[0001]The present invention relates to a stapler.
Background technology
[0002]For staplers that bind paper bundles, a technique having a so-called boosting mechanism has been proposed in order to reduce the load required for operation (see, for example, Patent Document 1). In the conventional booster mechanism configuration, the load reduction rate (boost factor) is constant throughout the entire stroke of the steering wheel. Therefore, the amount of operation of the handle becomes large, and the dimension in the height direction of the device becomes large.
[0003]
　On the other hand, a stapler having a so-called variable boosting mechanism that suppresses an increase in the amount of operation of the steering wheel by changing the reduction rate of the load according to the load required for the operation has been proposed (for example). , Patent Document 2).
[0004]
　Further, a stapler that binds a bundle of paper by penetrating a pair of legs of staples through the bundle of paper and bending it inward is widely used (see, for example, Patent Document 2). The stapler includes a handle arm, a driver arm, a magazine, a clincher arm, and the like as main components. The handle arm, the driver arm, and the magazine are rotatably supported by, for example, a bearing portion provided on the clincher arm via the shaft portion.
[0005]
　Here, in the stapler, grease, which is a lubricant, is applied to the shaft hole and the shaft portion of the bearing portion in order to reduce the friction between the shaft portion and other parts such as the handle arm during rotation (sliding). May be done.
Prior art literature
Patent documents
[0006]
Patent Document 1: Japanese Patent Application Laid-Open No. 2002-288777
Patent Document 2: Japanese Patent Application Laid-Open No. 2013-230517
Outline of the invention
Problems to be solved by the invention
[0007]
　The stayer equipped with the variable boosting mechanism has a long hole shape in which the shaft hole provided on the handle side is closed in order to change the boosting factor, and the shaft hole and the shaft are engaged with the handle in the standby position. Because it fits, it cannot be configured to open the magazine by rotating the handle. Therefore, it has a configuration in which the magazine is slid forward of the staples. Therefore, the number of parts is large and the size of the device is increased.
[0008]
　Further, the stapler equipped with the variable boosting mechanism uses a stapler having a larger dimension than the stapler called JIS No. 10 needle. On the other hand, it is desired that staples called JIS 10 staples can be used, the number of staples that can be stored is increased, and the staples can be operated in the same manner as the conventional staples.
[0009]
　If the amount of grease applied to the bearing or shaft is small, or if the amount of grease applied is reduced due to repeated use of the stapler, the friction (sliding resistance) between the shaft and other parts will increase. , Sliding defects may occur. Even if you try to increase the amount of grease applied, the diameter of the shaft hole in the bearing and the diameter of the shaft are designed to be almost the same in the conventional stapler, so the amount of grease that can be applied to the bearing is limited to a certain amount. There was a problem that it would be done.
[0010]
　An object of the present invention is to provide a stapler having a variable boosting mechanism and capable of opening a magazine by rotating a handle, and a stapler having an increased number of staples called JIS No. 10 needle. ..
[0011]
　Another object of the present invention is to provide a stapler capable of suppressing the occurrence of sliding defects with other parts in the bearing portion.
Means to solve problems
[0012]
　According to the present invention, there is a clincher unit having a clincher portion for bending the leg portion of the staple on one end side, and a magazine loaded with a staple bundle to which the staples are connected, and the other end portion of the clincher unit. A magazine unit rotatably supported with respect to the clincher unit and a driver for ejecting staples from the magazine are provided on one end side with the fulcrum shaft as a fulcrum, and the other end side is the fulcrum shaft. The driver unit is rotatably supported with respect to the clincher unit, and the driver unit is connected to the driver unit by a transmission shaft provided between the fulcrum shaft and the driver, and the driver unit is opened and closed in a direction approaching the clincher unit. The handle unit to be moved, the cam shaft portion provided on either the clincher unit or the handle unit, and the cam shaft portion provided on either the clincher unit or the handle unit are provided, and the cam shaft portion is inserted and the clincher unit and the handle unit are separated from each other. The movement path of the handle unit to the clincher unit by opening and closing the cam groove part where one end along the direction is opened and the cam shaft part is inserted and removed, and the handle unit and driver unit with respect to the clincher unit and magazine unit. A stayer with a guide section that regulates is provided.
[0013]
　The cam groove that changes the boost power factor has a shape in which one end is open along the direction in which the clincher unit and the handle unit are separated. The shaft can be inserted and removed. Further, the operation of opening and closing the handle unit and the driver unit with respect to the clincher unit and the magazine unit regulates the movement path of the handle unit with respect to the clincher unit, and the operation of closing the handle unit can guide the cam groove portion to the cam shaft portion.
[0014]
　Further, it has a clincher unit having a clincher portion for bending a leg of a stapler on one end side and a magazine loaded with a staple bundle to which the staples are connected, and a fulcrum point on the other end side of the clincher unit. It has a magazine unit that is rotatably supported with respect to the clincher unit with the shaft as a fulcrum, and a driver that ejects staples from the magazine on one end side, and the other end side uses the fulcrum shaft as a fulcrum. A driver unit that is rotatably supported by the clincher unit, and a handle unit that is connected to the driver unit by a transmission shaft provided between the fulcrum shaft and the driver, and opens and closes the driver unit in a direction closer to the clincher unit. The magazine unit is provided with a pusher that is movable along the longitudinal direction of the magazine, a pusher spring that presses the pusher toward the magazine front wall of the magazine, and one end attached to the pusher and the other. The end is attached to the driver unit and has a pusher band that connects the pusher and the driver unit. The pusher band retracts the pusher by opening the handle unit and driver unit with respect to the clincher unit and magazine unit. When moved to the final retracted position, the length between the inner surface side of the front wall of the magazine and the pusher is 75 mm or more, the length of the magazine is 90 mm or more and 100 mm or less, the length of the pusher band is 51 mm or more and 61 mm or less, and the fulcrum. Provided are staples in which the length from the shaft portion to the mounting position of the pusher band with respect to the driver unit is 41 mm or more and 50 mm or less, and the total length of the stapler is 105 mm or more and 125 mm or less.
[0015]
　The length of the staple bundle to which the staples called JIS No. 10 needles are connected is about 25 mm, and three staple bundles can be loaded in the magazine.
The invention's effect
[0016]
　In a stapler equipped with a variable boosting mechanism, the magazine is opened in the same operation as the conventional stapler that rotates the handle, and the staple bundle can be loaded.
[0017]
　Further, in a stapler having a size that can be held and operated by hand, three staple bundles to which the staples of the JIS No. 10 needle are connected can be loaded, and the frequency of replacement of the staple bundles can be reduced.
A brief description of the drawing
[0018]
FIG. 1 is a side sectional view showing an example of a stapler according to the first embodiment of the present invention.
FIG. 2 is a side sectional view showing an example of a stapler.
FIG. 3 is a cross-sectional perspective view showing an example of a stapler.
FIG. 4 is a perspective view showing an example of a stapler.
FIG. 5 is an exploded perspective view showing an example of a stapler.
FIG. 6 is an exploded perspective view showing an example of a stapler.
FIG. 7A is a front view showing an example of staples used in a stapler.
FIG. 7B is a side view showing an example of staples used in a stapler.
FIG. 8A is a perspective view showing an example of a magazine unit.
FIG. 8B is a plan view showing an example of a magazine unit.
FIG. 8C is a cross-sectional view showing an example of a magazine unit.
FIG. 8D is a cross-sectional view showing an example of a magazine unit.
FIG. 9 is a side sectional view showing an operation of binding a bundle of paper with staples.
FIG. 10 is a side sectional view showing an operation of binding a bundle of paper with staples.
FIG. 11 is a side sectional view showing an operation of opening and closing the handle unit.
FIG. 12 is a side sectional view showing an operation of opening and closing the handle unit.
FIG. 13 is a side sectional view showing an operation of opening and closing the handle unit.
FIG. 14 is a side sectional view showing an operation of opening and closing the handle unit.
FIG. 15 is a side sectional view showing a modified example of the operation of opening and closing the handle unit.
FIG. 16 is a side sectional view showing an operation of opening and closing the handle unit and loading a staple bundle.
FIG. 17 is a side sectional view showing an operation of opening and closing the handle unit and loading a staple bundle.
FIG. 18 is a perspective view of a stapler according to a second embodiment of the present invention.
[Fig. 19] It is a side view of a stapler.
FIG. 20 is a cross-sectional view of a stapler (No. 1).
FIG. 21 is a side view of the stapler with the handle cover and the like removed (No. 1).
FIG. 22 is a cross-sectional view of a stapler (No. 2).
FIG. 23 is an exploded perspective view of the stapler (No. 1).
FIG. 24 is an exploded perspective view of the stapler (No. 2).
FIG. 25A is a side view of a stapler having a holding portion.
[Fig. 25B] It is an enlarged view of a main part of a holding part.
FIG. 26 is a perspective view of a bearing portion.
[Fig. 27] Fig. 27 is an operation diagram of the stapler (No. 1).
[Fig. 28] Fig. 28 is an operation diagram of the stapler (No. 2).
[Fig. 29] Fig. 29 is an operation diagram of the stapler (No. 3).
FIG. 30A is a perspective view of a bearing portion according to a first modification of the second embodiment of the present invention.
FIG. 30B is an enlarged view of a main part of a holding portion according to a first modification.
FIG. 31A is a side view of a stapler according to a second modification of the second embodiment of the present invention.
FIG. 31B is an enlarged view of a main part of a holding portion according to a second modification.
FIG. 32A is a side view of a stapler according to a third modification of the second embodiment of the present invention.
FIG. 32B is an enlarged view of a main part of a holding portion according to a third modification.
Mode for carrying out the invention
[0019]
　The first embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 17.

　FIGS. 1 and 2 are side sectional views showing an example of a stapler according to the present embodiment, FIG. 3 is a cross-sectional perspective view showing an example of a stapler, and FIG. 4 shows an example of a stapler. The perspective views, FIGS. 5 and 6, are exploded perspective views showing an example of the stapler. Further, FIG. 7A is a front view showing an example of staples used in the stapler, and FIG. 7B is a perspective view showing an example of staples used in the stapler.
[0020]
　First, the staple 10 will be described with reference to FIGS. 7A and 7B. As shown in FIG. 7A, the staple 10 includes a crown portion 10a and two leg portions 10b formed by being bent so as to be substantially parallel to one direction from both ends of the crown portion 10a. A plurality of staples 10 are bonded and integrated to form a staple bundle 11 as shown in FIG. 7B.
[0021]
　The staple 10 has a standard called JIS No. 10 needle, has a thickness of about 0.5 mm, and has a length L of a staple bundle 11 connecting a series of 50 standard staples of about 25 mm.
[0022]
　The stapler 1A described below uses the staple 10 called the JIS No. 10 needle and has a size that can be held and operated by hand, and reduces the load required for the operation of binding the paper bundle. It is provided with a boosting mechanism, and further has a configuration called a variable boosting mechanism in which the reduction rate of the load is switched so that the load is adjusted according to the operation in each step of the operation of binding the bundle of paper.
[0023]
　Further, the stapler 1A is a stapler having a variable boosting mechanism and having a size that can be held and operated by hand, and the staples can be loaded by opening and closing the handle unit.
[0024]
　Further, the stapler 1A is provided with a variable boosting mechanism and has a size that can be held and operated by hand so that three staple bundles of JIS No. 10 needle can be loaded.
[0025]
　The stapler 1A includes a clincher unit 2, a magazine unit 3, a driver unit 4, and a handle unit 5.
[0026]
　The clincher unit 2 includes a clincher arm 20 and a clincher arm cover 21 that covers the clincher arm 20.
[0027]
　The clincher arm 20 is formed into a predetermined shape by bending a plate-shaped metal material by, for example, punching and bending such as pressing. The clincher arm 20 is provided with a clincher portion 20a that bends the leg portion 10b of the staple 10 on the bottom surface portion 20b on the tip side, which is one end side along the extending direction of the clincher arm 20. In the clincher portion 20a, a groove portion that bends the leg portion 10b of the staple 10 into a predetermined shape is integrally formed with the bottom surface portion 20b of the clincher arm 20.
[0028]
　Further, the clincher arm 20 has a pair of side wall portions 20c in such a form that both side portions on the rear end side, which is the other end side along the extending direction of the clincher arm 20, are bent substantially perpendicular to the bottom surface portion 20b. Is formed.
[0029]
　The clincher arm 20 is provided with a fulcrum pin support portion 20d on the other end side into which a fulcrum pin 22 which is a fulcrum shaft portion is inserted through a pair of side wall portions 20c. The fulcrum pin support portion 20d is composed of a hole portion penetrating the pair of side wall portions 20c. Further, the clincher arm 20 includes a camshaft support portion 20e through which the camshaft 23, which is a cam shaft portion, is inserted through the pair of side wall portions 20c, between the clincher portion 20a and the fulcrum pin support portion 20d. The camshaft support portion 20e is composed of holes penetrating the pair of side wall portions 20c.
[0030]
　Further, the clincher arm 20 is provided with a regulation convex portion 20f that restricts the handle unit 5 from opening with respect to the clincher unit 2 between the clincher portion 20a and the camshaft support portion 20e. The regulation convex portion 20f is configured by providing convex portions having a predetermined shape on the outer surfaces of the pair of side wall portions 20c. Further, the clincher arm 20 is provided with a guide convex portion 20g for guiding the opening and closing of the handle unit 5 between the fulcrum pin support portion 20d and the camshaft support portion 20e. The guide convex portion 20g is an example of the guide portion, and is configured by providing a cylindrical convex portion on the outer surface of each of the pair of side wall portions 20c.
[0031]
　The clincher arm cover 21 is made of resin and has a shape that covers the bottom surface portion 20b of the clincher arm 20 and the pair of side wall portions 20c.
[0032]
　8A is a perspective view showing an example of a magazine unit, FIG. 8B is a plan view showing an example of the magazine unit, and FIGS. 8C and 8D are cross-sectional views showing an example of the magazine unit.
[0033]
　The magazine unit 3 has a magazine 30 loaded with the staples 10, a pusher 31 for pressing the staples 10 loaded in the magazine 30 in the line width direction orthogonal to the crown portion 10a, and a pusher guide for guiding the movement of the pusher 31. 32, a pusher spring 33 for urging the pusher 31, a pusher band 34 for moving the pusher 31 by opening and closing the handle unit 5, and a magazine return spring 35 for urging the magazine unit 3 in a direction away from the clincher unit 2. Be prepared.
[0034]
　The magazine 30 is formed into a predetermined shape by bending a plate-shaped metal material by, for example, cutting and bending such as pressing, and a space is provided in which the staple 10 can be loaded and the top surface is open. That is, the magazine 30 is formed with a pair of magazine side wall portions 30a in a form in which both side portions of the magazine bottom surface portion are bent substantially vertically in one direction so as to be erected from both side portions of the magazine bottom surface portion. ..
[0035]
　The magazine 30 is configured such that the inner width of the magazine side wall portion 30a facing the magazine 30 is substantially the same as the outer width of the crown portion 10a of the staple 10 to the extent that the staple bundle 11 can be inserted, and is between the magazine side wall portions 30a facing each other. The staple 10 can be loaded, and the position of the loaded staple 10 in the width direction is restricted.
[0036]
　Further, the magazine 30 has a form in which the tip ends of the pair of magazine side wall portions 30a, which are one end side along the longitudinal direction of the magazine 30, are bent inward to close the tips of the magazine side wall portions 30a facing each other. The magazine front wall portion 30b is formed by the above, and an opening 30c is provided in the lower portion of the magazine front wall portion 30b so as to allow the staple 10 separated into one to pass through.
[0037]
　Further, the magazine 30 is provided with a fulcrum pin support portion 30d through which the pair of magazine side wall portions 30a is inserted and into which the fulcrum pin 22 is inserted, on the rear end side which is one end side along the longitudinal direction of the magazine 30. .. The fulcrum pin support portion 30d is composed of a hole portion penetrating the pair of magazine side wall portions 30a.
[0038]
　The pusher 31 is made of a resin material such as plastic, and has a pressing portion 31a for pressing the staple 10, a pusher spring locking portion 31b for locking the pusher spring 33, and a band locking (not shown) for locking the pusher band 34. It has a part. The pressing portion 31a is configured to project forward from both left and right sides on the tip end side of the pusher 31 facing the magazine front wall portion 30b, and presses the two leg portions 10b of the staple 10. The pusher spring locking portion 31b is configured by providing a protrusion on the inside of one side surface of the pusher 31 on which one end of the pusher spring 33 is hooked.
[0039]
　The pusher guide 32 is made of a resin material such as plastic and extends along the longitudinal direction of the magazine 30. The width of the pusher guide 32 in the lateral direction is narrower than the inner width of the crown portion 10a of the staple 10, and there is a space between the pusher guide 32 and the magazine side wall portion 30a where the leg portion 10b of the staple 10 can be inserted. Provided.
[0040]
　The pusher guide 32 includes a staple guide portion 32a that presses the staple 10 separated into one against the magazine front wall portion 30b. The staple guide portion 32a has a width slightly shorter than the inner width of the crown portion 10a of the staple 10, and is integrally provided on the tip end side of the pusher guide 32 so as to face the magazine front wall portion 30b of the magazine 30.
[0041]
　The pusher guide 32 includes a pusher spring guide portion 32b that guides the pusher spring 33 and a pusher spring locking portion 32c to which the pusher spring 33 is locked. The pusher spring guide portion 32b is configured by providing a convex portion on the bottom surface side of the pusher guide 32 so that the pusher spring 33 is folded back in a U shape on the tip end side of the pusher guide 32. The pusher spring locking portion 32c is configured by providing a protrusion on one inner surface of the rear end side of the pusher guide 32 on which the other end of the pusher spring 33 is hooked.
[0042]
　Further, the pusher guide 32 includes a regulation unit 32d that restricts the magazine unit 3 from opening with respect to the clincher unit 2. When the pusher guide 32 is attached to the magazine 30, the regulating portion 32d can insert the camshaft 23 into the convex portion protruding from the bottom surface of the magazine in the clincher unit 2 direction, and the camshaft 23 can be inserted in the moving direction of the magazine unit 3 with respect to the clincher unit 2. It is configured by providing an elongated hole having a shape extending along the line.
[0043]
　The pusher spring 33 is composed of a tension coil spring. One end of the pusher spring 33 is locked to the pusher spring locking portion 31b of the pusher 31. Further, the pusher spring 33 is folded back in a U shape by the pusher spring guide portion 32b at the intermediate portion on the tip end side of the pusher guide 32. Further, the other end of the pusher spring 33 is locked to the pusher spring locking portion 32c of the pusher guide 32. As a result, the pusher spring 33 is extended by the action of moving the pusher 31 toward the rear end side of the magazine 30, and the pusher 31 is pressed toward the tip of the magazine 30 by the force of contraction of the pusher spring 33.
[0044]
　The pusher band 34 is made of a tape-shaped resin material, and one end thereof is attached to the pusher 31.
[0045]
　The magazine return spring 35 is composed of a compression coil spring and is attached between the magazine unit 3 and the clincher unit 2.
[0046]
　In the magazine unit 3, the pusher 31 and the pusher spring 33 are assembled to the pusher guide 32 in the above-described manner, and the pusher guide 32 to which the pusher 31 and the pusher spring 33 are assembled is attached to the inside of the magazine 30.
[0047]
　In the magazine unit 3, the movement of the pusher 31 is guided by the pusher guide 32. Further, the staples 10 loaded in the magazine 30 are guided by the pusher guide 32 in a state where the pusher 31 is retracted by the operation of loading or unloading the staple bundle 11 with respect to the magazine 30, and the remaining number is particularly small. The staple 10 is prevented from falling over. Further, the staples 10 separated into one and launched are guided by the staple guide portion 32a of the pusher guide 32.
[0048]
　The magazine unit 3 is attached to the clincher unit 2 by inserting the fulcrum pin 22 inserted into the fulcrum pin support portion 20d of the clincher arm 20 into the fulcrum pin support portion 30d of the magazine 30. Further, the camshaft 23 inserted into the camshaft support portion 20e of the clincher arm 20 is inserted into the regulating portion 32d protruding from the magazine bottom surface portion of the magazine 30. The magazine return spring 35 is attached between the magazine bottom surface portion of the magazine 30 and the bottom surface portion 20b of the clincher arm 20 in a state of being compressed by a predetermined amount.
[0049]
　As a result, the magazine unit 3 can rotate with respect to the clincher unit 2 with the fulcrum pin 22 as the fulcrum axis, and when the magazine unit 3 rotates in the direction approaching the clincher unit 2, the magazine return spring 35 is compressed. When the compressed magazine return spring 35 is restored, the magazine unit 3 rotates in a direction away from the clincher unit 2, and the rotatable range of the magazine unit 3 is the regulation portion into which the camshaft 23 is inserted. It is regulated by 32d, and a predetermined space is secured between the magazine 30 and the clincher portion 20a.
[0050]
　The driver unit 4 includes a driver arm 40, a driver arm return spring 41, a driver 42, and a staple cover 43.
[0051]
　The driver arm 40 is formed into a predetermined shape by bending a plate-shaped metal material by, for example, punching and bending such as pressing. In the driver arm 40, both side portions of the top surface portion 40a are bent substantially perpendicular to the top surface portion 40a to form a pair of side wall portions 40b.
[0052]
　In the driver arm 40, a driver 42 that separates and launches the staple 10 loaded in the magazine 30 into one is attached to a top surface portion 40a on the tip side, which is one end side along the extending direction of the driver arm 40. .. The driver 42 has a width substantially equal to the outer width of the crown portion 10a of the staple 10, and has a plate thickness substantially equal to the line width of the staple 10.
[0053]
　Further, in the driver arm 40, the fulcrum pin support portion 40c into which the fulcrum pin 22 is inserted through the pair of side wall portions 40b is placed on the rear end side, which is the other end side along the extending direction of the driver arm 40. Be prepared. The fulcrum pin support portion 40c is composed of a hole portion penetrating the pair of side wall portions 40b.
[0054]
　Further, the driver arm 40 is provided with a booster pin support portion 40d into which the booster pin 6 which is a transmission shaft portion is inserted between the fulcrum pin support portion 40c and the driver 42. The booster pin support portion 40d is composed of a hole portion penetrating a pair of side wall portions 40b.
[0055]
　The staple cover 43 is formed into a predetermined shape by bending a plate-shaped metal material by, for example, punching and bending such as pressing. The staple cover 43 is locked with the driver 42, and the magazine driver locking portion 43a, which is locked with the magazine front wall portion 30b of the magazine 30, is placed on one end side of the staple cover 43 along the extending direction. It is provided on the top surface portion 43b on the tip side. Further, in the staple cover 43, both side portions of the top surface portion 43b are bent substantially perpendicular to the top surface portion 43b to form a pair of side wall portions 43c.
[0056]
　The staple cover 43 includes a fulcrum pin support portion 43d supported by the fulcrum pin 22 on the rear end side, which is the other end side along the extending direction of the staple cover 43. The fulcrum pin support portion 43d is composed of recesses provided in a pair of side wall portions 43c. Further, the staple cover 43 is provided with an opening 43e through which the pusher band 34 is passed between the magazine driver locking portion 43a and the fulcrum pin support portion 43d. Further, the staple cover 43 includes a mounting portion 43f to which the pusher band 34 and the driver arm return spring 41 are locked between the magazine driver locking portion 43a and the opening 43e.
[0057]
　The driver arm return spring 41 is composed of a compression coil spring, and one end thereof is engaged with a mounting portion 43f provided on the upper surface of the top surface portion 40a of the driver arm 40. It is installed between.
[0058]
　The driver unit 4 is a clincher unit when the fulcrum pin 22 inserted into the fulcrum pin support portion 20d of the clincher arm 20 and the fulcrum pin support portion 30d of the magazine 30 is inserted into the fulcrum pin support portion 40c of the driver arm 40. Attached to 2. Further, the magazine driver locking portion 43a of the staple cover 43 is locked to the driver 42, and the fulcrum pin support portion 43d of the staple cover 43 is supported by the fulcrum pin 22. The driver arm return spring 41 is attached between the top surface portion 40a of the driver arm 40 and the top surface portion 43b of the staple cover 43 in a state of being compressed by a predetermined amount. Further, one end of the pusher band 34 is attached to the pusher 31, and the other end of the pusher band 34 passes through the opening 43e and is attached to the mounting portion 43f.
[0059]
　As a result, the driver unit 4 can rotate with respect to the clincher unit 2 and the magazine unit 3 with the fulcrum pin 22 as the fulcrum axis. When the driver unit 4 rotates in a direction away from the magazine unit 3, the pusher band 34 pulls the pusher 31, and the pusher 31 is guided by the pusher guide 32 and moves to the rear end side of the magazine 30. As a result, a space into which the staple 10 can be loaded is formed between the inner surface side of the magazine front wall portion 30b and the pusher 31.
[0060]
　When the driver unit 4 rotates in the direction approaching the magazine unit 3, the pusher 31 moves to the tip end side of the magazine 30 by the pusher spring 33. When the staple 10 is loaded in the magazine 30, the staple 10 is pressed against the magazine front wall portion 30b by the pusher 31.
[0061]
　Further, when the driver unit 4 rotates in a direction approaching the magazine unit 3, the magazine driver locking portion 43a is locked to the magazine front wall portion 30b of the magazine 30. When the driver unit 4 rotates in a direction closer to the magazine unit 3, the driver 42 projects into the magazine 30 along the inner surface side of the magazine front wall portion 30b, and the driver arm return spring 41 is compressed.
[0062]
　When the compressed driver arm return spring 41 is restored, the driver unit 4 rotates in a direction away from the magazine unit 3, and the driver 42 retracts from the magazine 30. Further, by restoring the compressed driver arm return spring 41, the range in which the driver unit 4 can rotate is regulated by locking the driver 42 to the magazine driver locking portion 43a.
[0063]
　The handle unit 5 includes a handle arm 50 and a handle arm cover 51. The handle arm 50 is formed into a predetermined shape by bending a plate-shaped metal material by, for example, punching and bending such as pressing.
[0064]
　In the handle arm 50, both side portions of the top surface portion 50a are bent substantially perpendicular to the top surface portion 50a to form a pair of side wall portions 50b. The handle arm 50 has a boost pin support portion 50c into which the boost pin 6 is inserted through the pair of side wall portions 50b on the rear end side, which is the other end side along the extending direction of the handle arm 50. Be prepared. The booster pin support portion 50c is composed of a hole portion penetrating a pair of side wall portions 50b.
[0065]
　Further, the handle arm 50 is provided with a cam groove portion 50d on the rear end side in which the cam shaft 23 is inserted through the pair of side wall portions 50b. The cam groove portion 50d is formed of a groove portion that penetrates the pair of side wall portions 50b and has an open end on the clincher unit 2 side, which is one end along the direction in which the clincher unit 2 and the handle unit 5 are separated from each other.
[0066]
　Further, the handle arm 50 includes a regulation recess 50e into which the regulation protrusion 20f of the clincher arm 20 is inserted. The regulation recess 50e penetrates a pair of side wall portions 50b and is composed of a rectangular opening along the moving direction of the handle unit 5 with respect to the clincher unit 2.
[0067]
　The handle arm cover 51 is made of resin and has a shape that covers the top surface portion 50a of the handle arm 50 and the pair of side wall portions 50b. The handle arm cover 51 includes a guide recess 51a into which the guide protrusion 20g of the clincher arm 20 is inserted. The guide recess 51a is an example of a guide portion, and is configured by providing a groove portion for guiding the handle unit 5 on the inner surface of the handle arm cover 51 by opening and closing the handle unit 5 with respect to the clincher unit 2. The groove portion forming the guide recess may be provided in the handle arm 50.
[0068]
　The handle arm 50 can be regarded as a rotational movement when the handle arm 50 is moved, depending on the shape of the cam groove portion 50d guided by the cam shaft 23 and the locus on which the booster pin 6 can move. A virtual fulcrum axis when the displacement of the handle arm 50 is regarded as a rotational motion is formed on the rear end side of the handle arm 50. The handle arm 50 presses the driver arm 40 via the boosting pin 6 by being displaced by a rotational operation with the virtual fulcrum axis as the fulcrum.
[0069]
　In the handle arm 50, the contact angle between the cam groove portion 50d and the cam shaft 23 is changed according to the rotational operation of the handle arm 50, so that the direction in which the cam groove portion 50d is guided by the cam shaft 23 is changed, and the handle arm 50 is used. Move the virtual fulcrum axis of the rotation operation of.
[0070]
　Therefore, the cam groove portion 50d is set with a section in which the contact angle with the cam shaft 23 is different depending on the portion of the cam shaft 23 that changes due to the rotational operation of the handle arm 50. In this example, the cam groove portion 50d is formed by a predetermined groove shape in which two sections of the first section 50d (1) and the second section 50d (2) are combined.
[0071]
　The handle arm 50 and the driver arm 40 are rotatably connected to the rear end side of the handle arm 50 and the rear end side of the driver arm 40 by a booster pin 6.
[0072]
　The booster pin 6, which is a connecting portion between the handle arm 50 and the driver arm 40, is provided in front of the fulcrum pin 22 that supports the rear end side of the driver arm 40 on the clincher arm 20, and the booster pin 6 can move. The locus is an arc centered on the fulcrum pin 22.
[0073]
　As a result, in the handle arm 50, the tip end side of the handle unit 5 becomes a force point to which a force is applied by the user, and the booster pin 6 which is a connecting portion with the driver arm 40 acts on the driver arm 40. It becomes a point, and the virtual fulcrum axis becomes the fulcrum of the rotation operation.
[0074]
　Further, in the driver arm 40, the boosting pin 6 which is a connecting portion with the handle arm 50 serves as a force point to which a force is applied by the handle arm 50, and the driver 42 serves as a force acting point on the staple 10 and serves as a fulcrum. The pin 22 serves as a fulcrum for the rotational operation.
[0075]
　The handle unit 5 connected to the driver unit 4 by the booster pin 6 opens and closes the driver unit 4 in the direction closer to and away from the clincher unit 2. The handle unit 5 and the driver unit 4 realize a boosting mechanism in which the load applied to the handle arm 50 is reduced by the ratio of the force point in the handle arm 50 and the driver arm 40 and the distance between the action point and the fulcrum.
[0076]
　Then, in the handle arm 50, the contact angle between the cam groove portion 50d and the cam shaft 23 is changed according to the rotational operation of the handle arm 50, so that the direction in which the cam groove portion 50d is guided by the cam shaft 23 is changed, and the handle is handled. By moving the virtual fulcrum shaft of the rotational operation of the arm 50, a variable boosting mechanism that changes the reduction rate of the load applied to the handle arm 50 is realized.
[0077]
　In this example, the handle unit 5 is an operation of sandwiching a paper bundle between the clincher portion 20a of the clincher unit 2 and the magazine 30 of the magazine unit 3 and an operation of the staple 10 penetrating the paper bundle and binding the paper bundle. Change the load applied to.
[0078]
　
　FIGS. 9 and 10 are side sectional views showing an operation of binding a bundle of paper with staples, and the action and effect of the variable boosting mechanism will be described.
[0079]
　From the standby state shown in FIG. 1, as shown by an arrow F in FIG. 9, when a force for pressing the tip side of the handle arm cover 51 of the handle unit 5 in the clincher unit 2 direction is applied, the tip side of the handle unit 5 is moved. The rotation operation with the virtual fulcrum axis as the fulcrum moves in the direction approaching the clincher unit 2. When the handle unit 5 moves in the direction approaching the clincher unit 2, the boosting pin 6 presses the driver unit 4 in the direction approaching the clincher unit 2, and the driver unit 4 presses the driver arm return spring 41 as shown in FIG. And the magazine unit 3 is pressed in the direction approaching the clincher unit 2 via the staple cover 43. As a result, the magazine unit 3 and the driver unit 4 move in the approaching direction of the clincher unit 2 by the rotational operation with the fulcrum pin 22 as the fulcrum.
[0080]
　The handle unit 5, the driver unit 4, and the magazine unit 3 move from the standby state shown in FIG. 1 to the state shown in FIG. 9, and the paper is placed between the clincher portion 20a of the clincher unit 2 and the magazine 30 of the magazine unit 3. In the operation of sandwiching the bundle, the first section 50d (1) of the cam groove portion 50d comes into contact with the cam shaft 23. Note that the bundle of paper is not shown in FIG. When the first section 50d (1) of the cam groove portion 50d is in contact with the cam shaft 23, the virtual fulcrum axis of the handle unit 5 is in the vicinity of the fulcrum pin 22.
[0081]
　From the state where the paper bundle is sandwiched between the clincher portion 20a of the clincher unit 2 and the magazine 30 of the magazine unit 3, the force that further presses the tip side of the handle arm cover 51 of the handle unit 5 in the clincher unit 2 direction is applied. When added, the movement of the magazine unit 3 is restricted by the paper bundle, and the driver unit 4 moves in the direction approaching the magazine unit 3.
[0082]
　When the driver unit 4 moves in the direction approaching the magazine unit 3, the driver 42 projects into the magazine 30 along the inner surface side of the magazine front wall portion 30b. As a result, one of the most advanced staples 10 of the staple bundle 11 loaded in the magazine 30 is separated from the staple bundle 11 and ejected from the magazine 30. The staple 10 ejected from the magazine 30 has a pair of legs 10b penetrating the paper bundle and being bent inward by the clincher portion 20a to bind the paper bundle.
[0083]
　In the operation in which the handle unit 5 and the driver unit 4 move from the state shown in FIG. 9 to the state shown in FIG. 10 and the staple 10 penetrates the paper bundle and binds the paper bundle, the cam shaft 23 has the cam groove portion 50d. Section 50d (2) of 2 touches. Note that the paper bundle is not shown in FIG. When the second section 50d (2) of the cam groove portion 50d is in contact with the cam shaft 23, the virtual fulcrum axis of the handle unit 5 moves in the direction approaching the boosting pin 6 from the vicinity of the fulcrum pin 22.
[0084]
　As a result, in the operation of sandwiching the paper bundle between the clincher portion 20a of the clincher unit 2 and the magazine 30 of the magazine unit 3, the movement amount of the handle arm 50 and the movement amount of the driver arm 40 are close to each other. Therefore, the reduction rate of the load is lowered, but the increase in the operating amount of the handle unit 5 is suppressed. Therefore, in the standby state shown in FIG. 1, the dimension between the clincher unit 2 and the handle unit 5 can be reduced as compared with the stapler which is provided with the boosting mechanism but is not provided with the variable boosting mechanism.
[0085]
　On the other hand, in the operation in which the staple 10 penetrates the paper bundle and binds the paper bundle, the movement amount of the handle arm 50 increases with respect to the movement amount of the driver arm 40, but the load reduction rate increases and the handle arm The load applied to 50 is reduced.
[0086]
　In the operation of sandwiching the paper bundle between the clincher portion 20a of the clincher unit 2 and the magazine 30 of the magazine unit 3, the load applied to the handle unit 5 is the reaction force of the force pressing the magazine return spring 35. Therefore, even if the load reduction rate is low, the load on the operator is not large. On the other hand, in the operation of binding the paper bundle, the leg portion 10b of the staple 10 penetrates the paper bundle and further bends the leg portion 10b, so that the load applied to the handle unit 5 becomes large. Therefore, in the operation of the staple 10 penetrating the paper bundle and binding the paper bundle, the load applied to the handle arm 50 is reduced by increasing the load reduction rate. The load on the operator can be reduced.
[0087]
　11, FIG. 12, FIG. 13 and FIG. 14 are side sectional views showing an operation of opening and closing the handle unit, and the action and effect of opening and closing the handle unit 5 in the stapler 1A provided with the variable boosting mechanism will be described.
[0088]
　When a force is applied in the direction in which the handle unit 5 is separated from the clincher unit 2 from the standby state shown in FIG. Depart from. Further, the cam groove portion 50d of the handle unit 5 is disengaged from the cam shaft 23. Further, the guide concave portion 51a of the handle unit 5 is guided by the guide convex portion 20 g of the clincher unit 2, so that the tip side of the handle unit 5 is separated from the clincher unit 2 in a state where the movement path of the handle unit 5 is restricted. Move to.
[0089]
　When the tip side of the handle unit 5 moves away from the clincher unit 2, the driver unit 4 connected to the handle unit 5 by the booster pin 6 rotates with the fulcrum pin 22 as the fulcrum, and moves away from the magazine unit 3. Move to. When the driver unit 4 moves away from the magazine unit 3, the pusher band 34 pulls the pusher 31, and as shown in FIG. 13, the pusher 31 is guided by the pusher guide 32 and moves toward the rear end side of the magazine 30.
[0090]
　When the handle unit 5 and the driver unit 4 move from the state shown in FIG. 11 to a state in which they are substantially horizontal to the clincher unit 2 and the magazine unit 3 as shown in FIG. 12, the pusher is as shown in FIG. 31 moves to the last retreat position. As a result, a space into which the staple bundle 11 can be loaded is formed between the inner surface side of the magazine front wall portion 30b and the pusher 31.
[0091]
　As shown in FIG. 12, when the handle unit 5 and the driver unit 4 are moved from the open state until they are substantially horizontal to the clincher unit 2 and the magazine unit 3 in the direction in which the handle unit 5 is raised, the handle unit 5 and the driver unit 4 are raised. The guide recess 51a of 5 is guided by the guide protrusion 20g of the clincher unit 2. As a result, the handle unit 5 moves in the rising direction with respect to the clincher unit 2 and the magazine unit 3 as shown in FIG. 11 in a state where the movement path of the handle unit 5 is restricted.
[0092]
　As shown in FIG. 11, when the handle unit 5 moves in a rising direction with respect to the clincher unit 2 and the magazine unit 3, the driver unit 4 connected to the handle unit 5 by the booster pin 6 uses the fulcrum pin 22 as a fulcrum. It moves in the rising direction with respect to the clincher unit 2 and the magazine unit 3 by the rotational operation.
[0093]
　When the driver unit 4 moves in a rising direction with respect to the clincher unit 2 and the magazine unit 3, the pusher 31 moves to the tip end side of the magazine 30 by the pusher spring 33.
[0094]
　As shown in FIG. 11, when the handle unit 5 and the driver unit 4 are moved from the standing state with respect to the clincher unit 2 and the magazine unit 3 in the direction approaching the clincher unit 2, the handle unit 5 is moved. The guide recess 51a is guided by the guide protrusion 20g of the clincher unit 2. As a result, the handle unit 5 moves in a direction approaching the clincher unit 2 and the magazine unit 3 while the movement path of the handle unit 5 is restricted.
[0095]
　When the handle unit 5 moves in a direction approaching the clincher unit 2 and the magazine unit 3, the driver unit 4 connected to the handle unit 5 by the booster pin 6 rotates with the fulcrum pin 22 as the fulcrum to perform the clincher. It moves in a direction closer to the unit 2 and the magazine unit 3.
[0096]
　When the driver unit 4 moves in a direction approaching the clincher unit 2 and the magazine unit 3, the pusher 31 moves to the tip end side of the magazine 30 by the pusher spring 33. When the staple 10 is loaded in the magazine 30, the staple 10 is pressed against the magazine front wall portion 30b by the pusher 31.
[0097]
　Then, when the handle unit 5 is further moved in the direction closer to the clincher unit 2, the guide concave portion 51a of the handle unit 5 is guided by the guide convex portion 20 g of the clincher unit 2, and the movement path of the handle unit 5 is restricted. In this state, the handle unit 5 moves in a direction approaching the clincher unit 2 and the magazine unit 3. As a result, the cam groove portion 50d of the handle unit 5 enters the cam shaft 23. Further, the regulation concave portion 50e of the handle unit 5 fits into the regulation convex portion 20f of the clincher unit 2.
[0098]
　The stayer 1A provided with the variable boosting mechanism moves the virtual fulcrum axis of the rotation operation of the handle arm 50 by changing the contact angle between the cam groove portion 50d and the cam shaft 23 according to the rotation operation of the handle arm 50. It is a configuration to make. The cam groove portion 50d is formed of a groove portion having an open end on the clincher unit 2 side, so that the cam groove portion 50d is removed from the cam shaft 23 by moving the handle unit 5 in a direction away from the clincher unit 2. .. Therefore, the handle unit 5 and the driver unit 4 can be opened with respect to the clincher unit 2 and the magazine unit 3.
[0099]
　In the handle unit 5, the handle arm 50 is connected to the driver arm 40 of the driver unit 4 by a booster pin 6, and the handle unit 5 can rotate with respect to the driver unit 4 with the booster pin 6 as a fulcrum.
[0100]
　Therefore, when the handle unit 5 and the driver unit 4 are moved from the open state with respect to the clincher unit 2 and the magazine unit 3 in the direction of moving the handle unit 5 closer to the clincher unit 2, the direction of the handle unit 5 is changed. If it is not determined, it becomes difficult to insert the cam groove portion 50d of the handle unit 5 into the cam shaft 23.
[0101]
　Therefore, the movement path of the handle unit 5 can be regulated by configuring the guide recess 51a provided in the handle unit 5 to be guided by the guide convex portion 20g provided in the clincher unit 2. As a result, the handle unit 5 moves in a direction closer to the clincher unit 2 and the magazine unit 3. The cam groove portion 50d of the handle unit 5 can enter the cam shaft 23. Therefore, in the stapler 1A provided with the variable boosting mechanism, the staple unit 11 can be loaded by opening the top surface side of the magazine 30 by opening and closing the handle unit 5. Therefore, a mechanism for sliding the magazine or the like is not required, the structure can be simplified, and the cost can be reduced.
[0102]
　FIG. 15 is a side sectional view showing a modified example of the operation of opening and closing the handle unit. As a guide portion that regulates the movement path in the operation of opening and closing the handle unit 5, a regulation convex portion 50f that comes into contact with the driver arm 40 of the driver unit 4 is provided on the inner surface of the handle arm 50 of the handle unit 5, and the driver unit 4 The direction of the handle unit 5 may be regulated with respect to the steering wheel unit 5.
[0103]
　16 and 17 are side sectional views showing an operation of opening and closing the handle unit to load the staple bundle. In the stapler 1A provided with the variable boosting mechanism, the staple bundle 11 of the JIS No. 10 needle is attached to the magazine 30. The action and effect of allowing three staples to be loaded will be described.
[0104]
　The length L of the staple bundle 11 to which the staple 10 called the JIS No. 10 needle is connected is about 25 mm. Therefore, in order to allow the three staple bundles 11 to be loaded into the magazine 30, as shown in FIG. 17, the pusher 31 is moved to the rearmost retracted position, and the pusher 31 is moved to the inner surface side of the magazine front wall portion 30b. A length of 75 mm or more is required between the pusher 31 and the pusher 31.
[0105]
　Therefore, as shown in FIG. 16, the length L1 of the magazine 30 is set to 90 mm or more and 100 mm or less. The length of the magazine 30 is the length from the inner surface side of the magazine front wall portion 30b to the fulcrum pin 22. As shown in FIG. 8D, with the pusher 31 moved to the rearmost retracted position, the pusher spring 33 is extended by the action of moving the pusher 31 toward the rear end side of the magazine 30, so that the pusher 31 and the rear end of the magazine 30 are extended. A space for accommodating the compressed spring is not required between the side and the pusher 31, and the amount of retreat of the pusher 31 can be increased. Therefore, it is possible to suppress an increase in the length of the magazine 30 capable of loading the three staple bundles 11.
[0106]
　Further, as shown in FIGS. 16 and 17, the length L2 of the pusher band 34 is set to 51 mm or more and 61 mm or less in order to move the pusher 31 by opening and closing the handle unit 5. The length of the pusher band 34 is the length from one end exposed from the pusher 31 to the other end exposed from the opening 43e of the staple cover 43. Further, the length L3 from the fulcrum pin 22 to the mounting position of the pusher band 34 with respect to the driver unit 4 is set to 41 mm or more and 50 mm or less.
[0107]
　Further, the ratio (L1: L2) of the length L1 of the magazine 30 and the length L2 of the pusher band 34 was set to 10: 5.7 to 6.1. Further, the ratio (L1: L3) of the length L1 of the magazine 30 to the length L3 from the fulcrum pin 22 to the mounting position of the pusher band 34 with respect to the driver unit 4 is set to 10: 4.6 to 5.0. ..
[0108]
　Then, in order to make the stapler 1A having a size that can be held and operated by hand, the length L4 of the stapler 1A is set to 105 mm or more and 125 mm or less. The length of the stapler 1A is the length from the tip of the clincher arm cover 21 of the clincher unit 2 to the rear end of the handle arm cover 51 of the handle unit 5 in the stapler 1A in the standby state as shown in FIG. ..
[0109]
　As a result, in the stapler 1A having a size that can be held and operated by hand, three staple bundles 11 of the JIS No. 10 needle can be loaded into the magazine 30. Therefore, the loading frequency of the staple bundle 11 can be reduced. Further, even if the amount of movement of the pusher 31 in the operation of opening and closing the handle unit 5 is equal to or more than the length of three staple bundles 11 of the JIS No. 10 needle, the movement of the pusher 31 in the operation of opening and closing the handle unit 5 is performed. Is not disturbed.
[0110]
　Then, three staple bundles 11 of JIS No. 10 needles can be loaded into the magazine 30, and the stapler 1A having a size that can be held and operated by hand is equipped with a variable boosting mechanism and is used in each step of binding the paper bundles. The reduction rate of the load can be switched so that the load matches the operation. Further, by providing the variable boosting mechanism, the dimension between the clincher unit 2 and the handle unit 5 can be reduced as compared with the stapler which is provided with the boosting mechanism but does not have the variable boosting mechanism. Further, the staple bundle 11 can be loaded into the magazine 30 by opening and closing the handle unit 5.
[0111]
　Further, the stapler 1A is usually used in such a form that the thumb rests on the tip side of the stapler 1A, which is the driving side of the staple 10. On the other hand, in an actual usage situation, contrary to normal, the stapler 1A is gripped with the rear end side facing up and the stapler 10 with the driving side facing down, and the handle unit 5 is held with the thumb against the rear end side. It is not uncommon to hold the stapler 1A with the so-called reverse holding and use it. Therefore, as shown in FIG. 4, a finger hook portion 51b may be provided on the rear end side of the handle arm cover 51 of the stapler 1A at a portion corresponding to the thumb when the stapler is used by holding it in the opposite hand. Since the finger hook portion 51b is formed of recesses and protrusions, it feels good and is easy to hold, so that it has good holdability. In addition, it is easy to apply force during the binding work, the operation feeling is good, and the workability is also improved.
[0112]
　The second embodiment of the present invention will be described in detail below with reference to FIGS. 18 to 32B.
[0113]
　FIG. 18 is a perspective view of the stapler 1100A according to the present embodiment. FIG. 19 is a side view of the stapler 1100A. FIG. 20 is a cross-sectional view when the side surface side of the stapler 1100A is cut. FIG. 21 is a side view of the stapler 1100A shown in FIG. 20 with the handle cover 1054 and the like removed. FIG. 22 is a cross-sectional view of the stapler 1100A when the central side is cut. 23 and 24 are exploded perspective views of the stapler 1100A.
[0114]
　[Structural example of
　fulcrum 1100A ] As shown in FIGS. 18, 19, 19 and 21, the fulcrum 1100A receives a handle unit (operating member) 1050 that is displaced by receiving an operator's force and a load from the handle unit 1050. It is provided with a binding member 1070 that receives and rotates relative to the handle unit 1050 with the fulcrum pin 1062 as the fulcrum. The binding member 1070 is a driver that is connected to the magazine unit 1020 on which the staples are loaded and the handle unit 1050 via a boosting pin (connecting portion) 1064, and separates the staples loaded on the magazine unit 1020 into one and launches the staples. The driver unit 1040 having the 1044, the magazine unit 1020 and the driver unit 1040 are rotatably supported, and the clincher unit 1010 that bends the staple penetrating the paper and the shaft hole (hole) 1122a provided in the clincher unit 1010. It has a cam shaft (shaft portion) 1060 that is supported and supports the handle unit 1050.
[0115]
　In the present embodiment, the clincher unit 1010 side is the lower side of the stapler 1100A, and the handle unit 1050 side on the opposite side is the upper side of the stapler 1100A. Further, the driver 1044 side provided in the driver unit 1040 is the front side of the stapler 1100A, and the opposite side is the rear side of the stapler 1100A.
[0116]
　[Structure Example of
　Clincher Unit 1010 ] The clincher unit 1010 includes a clincher arm 1012 that bends the legs of staples that penetrate the paper bundle inward, and a clincher cover 1014 that protects the clincher arm 1012.
[0117]
　As shown in FIGS. 21 to 23 and the like, the clincher arm 1012 is formed by bending a metal plate into a substantially U shape, and has a long base portion 1120 extending in the front-rear direction and a rear portion of the base portion 1120. It has bearing portions 1122 and 1124 that are on the side and are erected from the left and right side surfaces of the base portion 1120.
[0118]
　Behind the center of the base portion 1120, an opening 1120a that can be fitted to the convex portion 1142 formed on the clincher cover 1014, which will be described later, is formed.
[0119]
　Shaft holes 1122c and 1124c for supporting the fulcrum pin 1062 are formed at the rear ends of the bearing portions 1122 and 1124. Support portions 1122d and 1124d that rotatably support the handle cover 1054 are formed slightly in front of the shaft holes 1122c and 1124c of the bearing portions 1122 and 1124. The support portions 1122d and 1124d are formed so as to project in an annular shape from the outer surface of the bearing portions 1122 and 1124. Shaft holes 1122a and 1124a (see FIG. 23) that support the camshaft 1060 are formed in substantially the central portion of the bearing portions 1122 and 1124. Holding portions 1123a, 1125a (see FIG. 23) for storing grease as a lubricant for reducing friction between the camshaft 1060 and other parts such as the handle unit 1050 are provided around the shaft holes 1122a and 1124a. ing. The details of the holding portions 1123a and 1125a will be described later.
[0120]
　Further, the clincher arm 1012 has a clincher groove portion 1126 and a remover 1128.
[0121]
　As shown in FIGS. 22 and 23, the clincher groove portion 1126 is provided at the front end portion of the base portion 1120, and is attached to the attachment portion 1140 of the clincher cover 1014, which will be described later. The clincher groove portion 1126 binds the paper bundle with the staples by bending the pair of legs of the staples penetrating the paper bundle with the binding force into a spectacle-like shape. The bent shape of the staples is not limited to the shape of glasses, and may be a flat shape. As a mechanism for realizing a flat shape, a known technique can be adopted.
[0122]
　The remover 1128 is provided at the rear end portion of the base portion 1120, and projects outward from the rear end side of the clincher cover 1014. The remover 1128 is formed so as to have a tapered shape toward the rear side when viewed from the side surface, and is inserted between the crown portion of the staple and the paper bundle to remove the staple from the paper bundle.
[0123]
　As shown in FIG. 23 and the like, the clincher cover 1014 is formed by molding, for example, a resin material into a U-shaped cross section, and covers the back surface of the base portion 1120 of the clincher arm 1012 and the side surface portions of the bearing portions 1122 and 1124. It is attached to the clincher arm 1012 as described above. A mounting portion 1140 for attaching the clincher arm 1012 is provided at the inner front end portion of the clincher cover 1014. A convex portion 1142 into which the opening 1120a of the clincher arm 1012 is fitted is provided slightly behind the center of the inside of the clincher cover 1014.
[0124]
　[Structure example of
　magazine unit 1020 ] The magazine unit 1020 includes a pusher spring 1024, a pusher guide 1026, a pusher 1028, and a pusher band 1030 in addition to the magazine 1022 for loading staples.
[0125]
　As shown in FIGS. 20 to 23, the magazine 1022 has an elongated box shape with an open upper portion and a rear portion, and is arranged inside the clincher arm 1012. In the present embodiment, the magazine 1022 can be loaded with up to three connected staples formed by adhesively connecting 50 staples. At the front end of the lower surface of the magazine 1022, an outlet 1200 for ejecting the leading staple loaded in the magazine 1022 toward the paper bundle side is formed.
[0126]
　Shaft holes 1222a and 1224a are formed at the rear ends of the side wall portions 1222 and 1224 constituting the magazine 1022. The fulcrum pins 1062 supported by the bearing portions 1122 and 1124 of the clincher arm 1012 are inserted into the shaft holes 1222a and 1224a. As a result, the magazine 1022 can rotate relative to the clincher arm 1012 with the fulcrum pin 1062 of the clincher arm 1012 as a fulcrum.
[0127]
　As shown in FIGS. 22 and 23, a magazine return spring 1034 made of a compression spring is arranged between the rear portion of the clincher arm 1012 and the rear portion of the magazine 1022. The magazine return spring 1034 rotates and urges the magazine 1022 toward the driver unit 1040, and secures a gap for inserting a bundle of paper between the clincher groove portion 1126 and the outlet 1200 of the magazine 1022.
[0128]
　As shown in FIGS. 22 and 23, the pusher guide 1026 is composed of a plate-shaped member extending in the front-rear direction and is arranged in the magazine 1022. On the lower surface of the pusher guide 1026 on the rear side, a regulating portion 1260 is provided so as to project (expose) toward the clincher arm 1012 from an opening (not shown) formed on the lower surface of the magazine 1022. An elongated hole 1260a extending in the vertical direction is formed in the regulating portion 1260. A cam shaft 1060 supported by the clincher arm 1012 is inserted into the elongated hole 1260a of the regulating portion 1260, and the vertical movement range of the magazine 1022 is regulated by the elongated hole 1260a.
[0129]
　As shown in FIG. 23 and the like, the pusher 1028 is a member that presses the staples loaded in the magazine 1022 toward the outlet 1200 side, and is slidably engaged with the pusher guide 1026.
[0130]
　As shown in FIG. 23, the pusher spring 1024 is a U-shaped tension spring and is arranged between the magazine 1022 and the pusher guide 1026. The open side of the pusher spring 1024 faces backwards. One end of the pusher spring 1024 is attached to a mounting portion 1262 provided at the rear end of the pusher guide 1026, and the other end of the pusher spring 1024 is attached to a mounting portion (not shown) provided on the pusher 1028.
[0131]
　With such a configuration, the pusher 1028 is pressed toward the outlet 1200 by the pusher spring 1024 to urge the staples loaded in the magazine 1022 toward the outlet 1200 and move the staples toward the outlet 1200. Move.
[0132]
　As shown in FIGS. 22 and 24, the staple cover 1032 has a length substantially the same as the length in the front-rear direction of the magazine 1022, and covers the staple loaded in the magazine 1022. A mounting portion 1320 is provided on the front end side of the upper surface of the staple cover 1032. The other end of the pusher band 1030 and one end of the driver arm return spring 1046 made of a compression spring are engaged with the mounting portion 1320. The rear end of the staple cover 1032 is provided with engaging portions 1322, 1324 that rotatably engage with the fulcrum pin 1062 supported by the clincher arm 1012. An opening 1326 for attaching the pusher band 1030 to the mounting portion 1320 on the upper surface of the staple cover 1032 is provided slightly in front of the engaging portion 1322 and the like of the staple cover 1032.
[0133]
　As shown in FIG. 23, the pusher band 1030 is composed of, for example, a long film member. One end 1300 of the pusher band 1030 is attached to the pusher 1028, the pusher band 1030 passes through the opening 1326, and the other end 1302 of the pusher band 1030 is attached to a mounting portion 1320 provided on the staple cover 1032. ..
[0134]
　As shown in FIGS. 22 and 24, a driver arm return spring 1046 made of a compression spring is arranged between the staple cover 1032 and the driver arm 1042. The driver arm return spring 1046 rotates and urges the driver arm 1042 so that the driver 1044 waits at a predetermined position above the outlet 1200 of the magazine 1022.
[0135]
　[Configuration Example of
　Driver Unit 1040 ] The driver unit 1040 has a driver arm 1042 that receives a force from the handle unit 1050 by a boosting pin 1064 and is displaced by a rotational operation, and a head that is loaded into the magazine 1022 by the rotation of the driver arm 1042. It is equipped with a driver 1044 that presses the staples of the paper to penetrate the bundle of paper.
[0136]
　The driver arm 1042 is arranged between the inner surface of the clincher arm 1012 and the outer surface of the magazine 1022, and is rotatably attached to the bearing portion 1122, 1124 of the clincher arm 1012.
[0137]
　As shown in FIG. 24, the driver arm 1042 is formed by bending a metal plate into a substantially U shape, and is formed from a long top surface portion 1420 extending in the front-rear direction and a side surface of the top surface portion 1420 in the left-right direction. It has side surface portions 1422 and 1424 extending downward.
[0138]
　As shown in FIGS. 22 and 24, a mounting portion 1420a for mounting the driver 1044 is provided on the lower surface of the top surface portion 1420 on the front end side. Shaft holes 1422a and 1424a are formed at the rear ends of the side surface portions 1422 and 1424, respectively. The fulcrum pins 1062 supported by the bearing portions 1122 and 1124 of the clincher arm 1012 are inserted into the shaft holes 1422a and 1424a. As a result, the driver arm 1042 can rotate relative to the clincher arm 1012 with the fulcrum pin 1062 of the clincher arm 1012 as a fulcrum.
[0139]
　As shown in FIGS. 22 and 24, the driver 1044 is formed by bending a metal plate into a substantially inverted L shape, and has a mounting portion 1440 and a pressing portion 1442. An opening 1440a is formed in the mounting portion 1440, and the opening 1440a is fitted into the mounting portion 1420a of the driver arm 1042. The width of the pressing portion 1442 in the left-right direction is selected to be substantially the same as the dimension of the crown portion of the staple, and the plate thickness of the pressing portion 1442 is selected to be substantially the same as the needle wire width of one staple.
[0140]
　[Structure Example of
　Handle Unit 1050 ] The handle unit 1050 includes a handle arm 1052 that presses the driver arm 1042 and a handle cover 1054 that protects the handle arm 1052.
[0141]
　As shown in FIGS. 20, 21 and 24, the handle arm 1052 is formed by bending a metal plate into a substantially U shape, and has a long top surface portion 1520 extending in the front-rear direction and a top surface portion 1520. It has a side surface portion 1522, 1524 extending downward from the side surface in the left-right direction of the above.
[0142]
　A boost pin 1064 is inserted in the rear portion of the side surface portion 1522, 1524 of the handle arm 1052, and the handle arm 1052 is rotatably supported by the driver arm 1042 via the boost pin 1064. The booster pin 1064 is provided in front of the fulcrum pin 1062.
[0143]
　A slideable cam groove (guide portion) 1056 is formed on the cam shaft 1060 of the clincher arm 1012 at a portion protruding downward from the rear portion of the side surface portion 1522. The cam groove 1056 is configured with the lower end side open. As a result, in the opening operation of the handle unit 1050, the cam groove 1056 of the handle arm 1052 is disengaged from the cam shaft 1060 to open the upper side of the magazine 1022, and the staples can be loaded from the upper side of the magazine 1022. .. Although not shown in FIG. 20 and the like, since the side surface portions 1522 and 1524 of the handle arm 1052 are symmetrical and have a common configuration, the side surface portions 1524 also have the same functions and shapes as the cam groove 1056 described above. A cam groove is provided as a guide portion to be provided.
[0144]
　As shown in FIGS. 20 and 24, the handle cover 1054 is formed by bending a resin plate into a substantially inverted U shape, and is formed on the outer peripheral surface of the handle arm 1052, the rear portion of the driver unit 1040, and the magazine unit 1020. Cover each of the rear parts. The fulcrum pin 1062 supported by the bearing portion 1122, 1124 of the clincher arm 1012 is located in the groove portion 1544 provided inside the rear portion of the handle cover 1054, and the fulcrum pin 1062 moves up and down when the handle cover 1054 is opened and closed. Functions as a moving escape groove.
[0145]
　A groove-shaped guide portion 1540 that slidably engages with the support portion 1122d of the clincher arm 1012 is formed on the inner side surface of the rear portion of the handle cover 1054. Although only the guide portion 1540 on the left side surface side is shown in FIG. 20, a similar guide portion is provided on the right side surface side as well. The guide unit 1540 regulates the rotation locus of the handle unit 1050 when the handle unit 1050 is opened with respect to the clincher unit 1010 or the like. Further, when the handle unit 1050 is closed with respect to the clincher unit 1010 or the like, the guide unit 1540 guides the open side of the cam groove 1056 of the handle unit 1050 that is detached from the cam shaft 1060 to the cam shaft 1060.
[0146]
　[Explanation
　of Variable Boosting Mechanism] Next, the variable boosting mechanism in the stapler 1100A according to the present embodiment will be described with reference to FIGS. 20 and 21 and the like. In the following, since the side surface portions 1522 and 1524 of the handle arm 1052 are symmetrical and have a common configuration, only one side surface portion 1522 side will be described for the sake of simplification of the description.
[0147]
　In the present embodiment, the handle arm 1052 is made minute from the locus in which the booster pin 1064 can move by applying a force to the front end side of the handle unit 1050 and the shape of the cam groove 1056 guided by the cam shaft 1060. The movement when it is moved to can be regarded as a rotational movement. Under this condition, a fulcrum axis O, which is a virtual rotation fulcrum when the displacement of the handle arm 1052 is regarded as a rotation operation, is formed on the rear end side of the handle arm 1052. The handle arm 1052 presses the driver arm 1042 via the booster pin 1064 by being displaced by a rotational operation with the fulcrum axis O (indicated by a cross in FIG. 20) as a fulcrum.
[0148]
　Further, in the handle arm 1052, the contact angle between the cam groove 1056 and the cam shaft 1060 is changed according to the rotational operation of the handle arm 1052 based on the pressing operation of the handle unit 1050, so that the cam groove 1056 and the cam shaft 1060 are brought into contact with each other. By changing the contact direction, the fulcrum axis O of the rotational operation of the handle arm 1052 is moved.
[0149]
　As a means for moving the fulcrum shaft O, the cam groove 1056 is set with three sections according to the contact angle at the time of contact with the cam shaft 1060 during the rotational operation of the handle arm 1052. More specifically, the cam groove 1056 has a predetermined elongated hole shape in which three sections of the first section 1056 (1001), the second section 1056 (1002), and the third section 1056 (1003) are combined. Consists of.
[0150]
　The first section 1056 (1001) of the cam groove 1056 is a section that comes into contact with the cam shaft 1060 when the stayer 1100A is in the standby state, is located at the lower end of the cam groove 1056, and has a contact angle with the cam shaft 1060. It is tilted in a direction that is approximately orthogonal to the horizontal direction.
[0151]
　The second section 1056 (1002) of the cam groove 1056 is a section that comes into contact with the cam shaft 1060 when the stayer 1100A switches from the standby state to the boosting state, and is continuous above the first section 1056 (1001). , The contact angle with the camshaft 1060 is slightly inclined in the horizontal direction with respect to the first section 1056 (1001).
[0152]
　The third section 1056 (1003) of the cam groove 1056 is a section that comes into contact with the cam shaft 1060 when the clinching operation of the stayer 1100A is completed in the boosting state, and is the upper side of the second section 1056 (1002). The contact angle with the camshaft 1060 is inclined in the horizontal direction from the second section 1056 (1002).
[0153]
　The booster pin 1064 is provided in front of the fulcrum pin 1062 that supports the driver arm 1042. The locus on which the booster pin 1064 can move is an arc centered on the fulcrum pin 1062.
[0154]
　With such a configuration, as shown in FIG. 20, in the stay plastic 1100A, the front end side of the handle unit 1050 becomes a force point E1 to which a force is applied by the operator, and a boosting pin which is a connecting portion between the driver arm 42 and the handle arm 1052. 1064 is the point of action E2 of the force on the driver arm 1042, and the fulcrum axis O is the fulcrum of the rotational operation.
[0155]
　Further, in the stapler 1100A, the boosting pin 1064, which is a connecting portion between the driver arm 1042 and the handle arm 1052, becomes a force point E3 to which a force is applied by the handle arm 1052, and the driver 1044 becomes a force action point E4 on the staples. , The fulcrum pin 1062 serves as a fulcrum for the rotational operation.
[0156]
　The handle unit 1050 and the driver unit 1040 realize a variable boosting mechanism in which the load F applied to the handle arm 1052 is reduced by the ratio of the force point in the handle arm 1052 and the driver arm 1042 and the distance between the action point and the fulcrum. The reduction rate D (%) of the load F applied to the handle arm 1052 is obtained by the following equation (1).
[0157]
[Number 1]

[0158]
　Here, as shown in FIG. 20, in the handle unit 1050, the length from the force point E1 at which the force is applied to the handle arm 1052 to the fulcrum axis O which is the rotation fulcrum of the handle arm 1052 is L11, and the force is applied to the driver arm 1042. Let L12 be the length from the boosting pin 1064, which is the point of action E2, to the fulcrum axis O.
[0159]
　Further, in the driver unit 1040, the length from the boost pin 1064, which is the force point E3 on which the force is applied to the driver arm 1042, to the fulcrum pin 1062, which is the rotation fulcrum of the driver arm 1042, is L13, and the driver 44 is the action point E4. Let L14 be the length from to the fulcrum pin 1062.
[0160]
　In the above equation (1), when the ratio of the length L12 from the boosting pin 1064 to the fulcrum axis O, which is the point of action E2, to the length L11 from the force point E1 to the fulcrum axis O is reduced, the load applied to the handle arm 1052. The rate of decrease in F increases.
[0161]
　In the stayer 1100A according to the present embodiment, the cam groove 1056 is formed in an elongated hole shape having three sections, so that the fulcrum shaft of the handle arm 1052 can be adjusted according to the position of the handle arm 1052 in the operation of binding the paper bundle. O is moved from the vicinity of the fulcrum pin 1062 in the direction of the booster pin 1064. As a result, in the first section 1056 (1001) in which the paper bundle is sandwiched between the clincher arm 1012 and the magazine unit 1020, the movement amount of the handle arm 1052 and the movement amount of the driver arm 1042 come close to each other. Therefore, although the load reduction rate is low, the increase in the operating amount of the handle arm 1052 is suppressed. On the other hand, in the second section 1056 (1002) and the third section 1056 (1003) in which the staples penetrate the paper bundle and bind the paper bundle, the movement amount of the handle arm 1052 is large, but the load is increased. The reduction rate is increased and the load applied to the handle arm 1052 is reduced. In this way, in the desired process of binding the paper bundle, the load F applied to the handle arm 1052 is gradually reduced so that the load F is adjusted to the movement, and the load is applied at the stage where the staples penetrate the paper bundle. Make F lighter.
[0162]
　[About the holding portion 1123a]
　By the way, when the variable boosting mechanism is adopted in the stayer 1100A as described above, the cam groove 1056 of the handle arm 1052 slides while contacting the cam shaft 1060 every time the binding process is performed. The surface pressure between the cam groove 1056 and the cam shaft 1060 becomes high, and a large load is applied to the bearing portion 1122. Here, in the conventional stayer, since the diameter of the cam shaft 1060 and the diameter of the shaft hole 1122a are selected to be substantially the same, the amount of grease that can be applied to the gap between the cam shaft 1060 and the shaft hole 1122a is constant. It may be restricted. Therefore, if the amount of grease decreases due to repeated use of the stapler 1100A, there is a problem that sliding defects occur in the cam groove 1056.
[0163]
　Therefore, in the present embodiment, the cam groove 1056 and the cam shaft 1060 are provided around the shaft hole 1122a by providing a holding portion 1123a for storing the grease for reducing the friction between the cam groove 1056 and the cam shaft 1060. We are trying to suppress the occurrence of sliding defects between and.
[0164]
　FIG. 25A is a side view of the stapler 1100A, and FIG. 25B is an enlarged view of a main part of the holding portion 1123a. FIG. 26 is a perspective view of the bearing portion 1122 including the holding portion 1123a. The diameter D1 of the shaft hole 1122a and the diameter D2 of the cam shaft 1060 are substantially the same. In the present embodiment, although not shown in FIGS. 25A, 26, etc., the holding portion 1125a is also provided in the bearing portion 1124 facing the bearing portion 1122. Since the holding portion 1125a on the bearing portion 1124 side has the same function and configuration as the holding portion 1123a on the bearing portion 1122 side, detailed description thereof will be omitted.
[0165]
　The holding portion 1123a is a part around the shaft hole 1122a, and is provided on the side opposite to the direction H1 in which the cam shaft 1060 is applied to the shaft hole 1122a by the cam groove 1056 due to the load when the handle arm 1052 is slid. ing. As a result, the area of ​​the shaft hole 1122a on the side to which the cam shaft 1060 is applied can be secured, so that grease is applied in the vicinity of the shaft hole 1122a without affecting the surface pressure between the cam shaft 1060 and the shaft hole 1122a. Can be stored. Further, the holding portion 1123a is formed in a concave shape cut out in a substantially semicircular shape when viewed in a plane from the peripheral edge portion of the shaft hole 1122a toward the clincher groove portion 1126 (front) side in the radial direction.
[0166]
　The size of the holding portion 1123a can be arbitrarily designed according to the amount of grease held. Further, the shape of the holding portion 1123a is not limited to a semicircular shape when viewed in a plane, and may be, for example, a rectangular shape. Further, only one of the holding portions 1123a and 1125a may be provided, or two holding portions may be provided. Further, although the holding portion 1123a has a shape in which at least a part of the outer surface of the bearing portion 1122 is recessed, the holding portion 1123a may be formed so as to penetrate the bearing portion 1122 in the thickness direction (left-right direction).
[0167]
　[Example of Operation of Stapler 1100A]
　FIGS. 27 to 29 are diagrams showing an example of the operation of the stapler 1100A according to the present embodiment. In the present embodiment, for example, at the time of assembling the stapler 1100A at the manufacturing stage, grease is applied to the holding portion 1123a in advance so that a certain amount of grease is accumulated in the holding portion 1123a, and then the assembling is completed. The 1100A is sold to the operator. The timing of applying grease is not limited to the time of manufacture, and may be after the stapler 1100A is sold.
[0168]
　In the standby state of the stapler 1100A, as shown in FIG. 27, the cam groove 1056 of the handle arm 1052 is in contact with the cam shaft 1060 in the first section 1056 (1001). In a state where the cam groove 1056 of the handle arm 1052 is in contact with the cam shaft 1060 in the first section 1056 (1001), the movement when the handle arm 1052 is slightly moved can be regarded as a rotational movement. Therefore, the fulcrum axis O, which is the virtual rotation fulcrum of the handle arm 1052, is formed in the vicinity of the fulcrum pin 1062, which is the rotation fulcrum of the driver arm 1042.
[0169]
　In the standby state, a bundle of paper (not shown) is placed on the clincher arm 1012 by the operator.
[0170]
　When the handle cover 1054 is pressed from the standby state by the operator, the cam groove 1056 is guided by the cam shaft 1060, so that the handle arm 1052 and the handle cover 1054 form a fulcrum shaft O in the vicinity of the fulcrum pin 1062. It is displaced by the rotational operation as a fulcrum, and the contact portion of the cam groove 1056 with respect to the cam shaft 1060 moves.
[0171]
　When the handle arm 1052 is rotated by pressing the handle cover 1054, the position of the booster pin 1064 is also displaced accordingly. As a result, the driver arm 1042 connected to the handle arm 1052 via the booster pin 1064 is pressed, and both the driver arm 1042 and the magazine unit 1020 rotate around the fulcrum pin 1062.
[0172]
　As the magazine unit 1020 rotates, a bundle of paper (not shown) composed of a predetermined number of sheets is sandwiched between the clincher unit 1010 and the magazine 1022. Further, as shown in FIG. 28, the cam groove 1056 of the handle arm 1052 comes into contact with the cam shaft 1060 in the second section 1056 (1002). Grease constantly exudes from the holding portion 1123a, and the exuded grease is supplied to the edge of the shaft hole 1122a and the peripheral surface of the camshaft 1060, respectively.
[0173]
　In the second section 1056 (1002) of the cam groove 1056, the rotation of the handle arm 1052 changes the contact angle with the cam shaft 1060 in a direction smaller than that of the first section 1056 (1001). As a result, the fulcrum axis O of the handle arm 1052 moves from the vicinity of the fulcrum pin 1062 in the direction of the booster pin 1064.
[0174]
　When the fulcrum axis O of the handle arm 1052 moves from the vicinity of the fulcrum pin 1062 in the direction of the booster pin 1064, the length L11 from the force point E1 to the fulcrum axis O shown in FIG. The length L12 from to the fulcrum axis O decreases. Therefore, when the load F is calculated by substituting the lengths L11 and L12 into the above equation (1), the reduction rate of the load F applied to the handle arm 1052 increases, and the result is obtained that the load F gradually decreases.
[0175]
　When the handle cover 1054 is further pressed from the state where the paper bundle is sandwiched, the driver arm 1042 is pressed by the displacement of the booster pin 1064 due to the rotational operation of the handle arm 1052. At this time, the driver arm 1042 rotates with the fulcrum pin 1062 as the fulcrum while the rotation of the magazine 1022 is restricted. By the rotation of the driver arm 1042, the connecting staples are pressed against the driver 1044 to separate them into one staple, and the separated staples are ejected from the ejection port 1200 and penetrate the paper bundle P (not shown).
[0176]
　Subsequently, when the handle cover 1054 is further pressed and the handle arm 1052 rotates to a position where the staple penetrates the bundle of paper, the cam groove 1056 of the handle arm 1052 becomes a third section 1056 (1003) as shown in FIG. In contact with the cam shaft 1060. When the contact portion between the cam groove 1056 and the cam shaft 1060 moves from the second section 1056 (1002) to the third section 1056 (1003), the fulcrum axis O is intermediate between the fulcrum pin 1062 and the boosting pin 1064. It moves to the booster pin 1064 side from the point. Also in this case, grease exudes from the holding portion 1123a, and the exuded grease is supplied to the edge portion of the shaft hole 1122a and the peripheral surface of the camshaft 1060, respectively.
[0177]
　When the fulcrum axis O of the handle arm 1052 moves to the boosting pin 1064 side, the length L11 from the force point E1 to the fulcrum axis O shown in FIG. When the length L12 is further reduced and the lengths L11 and L12 are substituted into the above equation (1) to calculate the load F, the reduction rate of the load F applied to the handle arm 1052 is further increased, and the load F is a desired value. The result is obtained.
[0178]
　Subsequently, when the handle cover 1054 is further pressed by the operator, the driver arm 1042 is pressed by the displacement of the booster pin 1064 due to the rotational operation of the handle arm 1052, and the driver arm is restricted from rotating the magazine 1022. 1042 further rotates around the fulcrum pin 1062. Along with this, when the tip of the leg portion of the staple protrudes from the back surface of the paper bundle, the leg portion is bent inward by the clincher groove portion 1126, and the paper bundle is bound by the staple.
[0179]
　In this state, the third section 1056 (1003) of the cam groove 1056 is formed on the boost pin 1064 side from the intermediate point between the fulcrum pin 1062 and the boost pin 1064 by being guided by the cam shaft 1060. Rotate around the fulcrum axis O as the fulcrum. Here, the third section 1056 (1003) of the cam groove 1056 coincides with the center of the arc with the fulcrum axis O, so that when the third section 1056 (1003) is guided by the cam shaft 1060, the fulcrum axis O does not move.
[0180]
　As a result, the length L11 from the force point E1 to the fulcrum axis O and the length L12 from the boosting pin 1064 to the fulcrum axis O, which is the point of action E2, do not change. The reduction rate of the applied load F becomes constant, and the reduced load F is maintained to a desired value.
[0181]
　As described above, according to the present embodiment, since the holding portion 1123a for storing grease is provided around the shaft hole 1122a, grease can be supplied to the shaft hole 1122a and the cam shaft 1060. Therefore, even if the number of bindings increases, the grease is always supplied from the holding portion 1123a to the cam shaft 1060 and the like, so that it is possible to prevent sliding defects between the cam groove 1056 of the handle arm 1052 and the cam shaft 1060. It is possible to keep the cam groove 1056 sliding smoothly. As a result, the number of durability can be increased even in the stapler 1100A provided with the variable boosting mechanism in which a high load is applied to the cam shaft 1060 or the like.
[0182]

　Next, the holding portion 1123b, which is the first modification of the holding portion 1123a for storing the grease described above, will be described. Since the stapler 1100B according to the first modification has the same configuration and function as the stapler 1100A of the above-described embodiment, the same reference numerals are used for common configurations, and detailed description is omitted or simplified. do.
[0183]
　FIG. 30A is a perspective view of the bearing portion 1122 having the holding portion 1123b according to the first modification, and FIG. 30B is an enlarged view of a main part of the holding portion 1123b according to the first modification.
[0184]
　The holding portion 1123b is formed by cutting out the peripheral edge portion of the shaft hole 1122a on the outer surface of the bearing portion 1122 facing the cam groove 1056 of the handle arm 1052 in a stepped shape over the entire circumference. The inner diameter D3 of the holding portion 1123b is selected to be substantially the same as the diameter D1 of the shaft hole 1122a, and the outer diameter D4 of the holding portion 1123b is selected to be slightly larger than the diameter D1 of the shaft hole 1122a. As described above, the holding portion 1123b is formed of an annular groove (recess) that does not penetrate the bearing portion 1122 in the thickness direction and is viewed in a plane.
[0185]
　The depth of the holding portion 1123b in the thickness direction and the outer diameter D4 of the holding portion 1123b can be arbitrarily configured according to the amount of grease accumulated. Further, although the outer shape of the holding portion 1123b is a perfect circular ring, it may be an elliptical ring or a rectangular shape. Further, although the example in which the holding portion 1123b is provided over the entire circumference of the shaft hole 1122a has been described, the holding portion 1123b may be provided in a part of the shaft hole 1122a in the circumferential direction.
[0186]
　As described above, according to the first modification, since the holding portion 1123b for storing grease is provided as in the above-described embodiment, grease can be constantly supplied to the shaft hole 1122a and the cam shaft 1060. As a result, it is possible to prevent a sliding defect between the cam groove 1056 of the handle arm 1052 and the cam shaft 1060, and it is possible to keep the handle arm 1052 having the cam groove 1056 sliding smoothly. As a result, the number of durability can be increased even in the stapler 1100B provided with the variable boosting mechanism in which a high load is applied to the camshaft 1060 or the like.
[0187]

　Next, the holding portion 1123c, which is a second modification of the holding portion 1123a for storing the grease described above, will be described. Since the stapler 1100C according to the second modification has the same configuration and function as the stapler 1100A of the above-described embodiment, the same reference numerals are used for common configurations, and detailed description is omitted or simplified. do.
[0188]
　FIG. 31A is a side view of the stapler 1100C having the holding portion 1123c according to the second modification, and FIG. 31B is an enlarged view of a main part of the holding portion 1123c.
[0189]
　The holding portion 1123c is provided in a part around the shaft hole 1122a, and the side opposite to the direction H1 to which the cam groove 1056 of the shaft hole 1122a is applied is extended toward the radial clincher groove portion 1126 (front) side. It is formed by. More specifically, the holding portion 1123c is formed by a hole portion including an elliptical shaft hole 1122a having a long side D5 and a short side D6, excluding the shaft hole 1122a (cam shaft 1060).
[0190]
　As described above, according to the second modification, since the holding portion 1123c for storing the grease is provided as in the above-described embodiment, the grease can be constantly supplied to the shaft hole 1122a and the cam shaft 1060. As a result, it is possible to prevent a sliding defect between the cam groove 1056 of the handle arm 1052 and the cam shaft 1060, and it is possible to keep the handle arm 1052 having the cam groove 1056 sliding smoothly. As a result, the number of durability can be increased even in the stapler 1100C provided with the variable boosting mechanism in which a high load is applied to the camshaft 1060 or the like.
[0191]

　Next, the holding portion 1123d, which is a third modification of the holding portion 1123a for storing the grease described above, will be described. Since the stapler 1100D according to the third modification has the same configuration and function as the stapler 1100A of the above-described embodiment, the same reference numerals are used for common configurations, and detailed description is omitted or simplified. do.
[0192]
　FIG. 32A is a perspective view of the stapler 1100D having the holding portion 1123d according to the third modification, and FIG. 32B is a plan view of the holding portion 1123d according to the third modification.
[0193]
　The holding portion 1123d is provided in a part around the shaft hole 1122a, and the side opposite to the direction H1 to which the cam groove 1056 of the shaft hole 1122a is applied is extended toward the radial clincher groove 1126 (front) side. It is composed of holes. More specifically, the diameter D7 of the holding portion 1123d is set to have a diameter larger than the diameter D1 of the shaft hole 1122a, and the edge portion 1123de in the direction H1 of the holding portion 1123d and the edge portion 1122ae in the direction H1 of the shaft hole 1122a are overlapped. When configured, the holding portion 1123d is composed of a hole portion other than the shaft hole 1122a.
[0194]
　As described above, according to the third modification, since the holding portion 1123d for storing grease is provided as in the above-described embodiment, the grease can be constantly supplied to the shaft hole 1122a and the cam shaft 1060. As a result, it is possible to prevent a sliding defect between the cam groove 1056 of the handle arm 1052 and the cam shaft 1060, and it is possible to keep the cam groove 1056 sliding smoothly. As a result, the number of durability can be increased even in the stapler 1100D provided with the variable boosting mechanism in which a high load is applied to the camshaft 1060 or the like.
[0195]
　The technical scope of the present invention is not limited to the above-described embodiment, and includes various modifications to the above-described embodiment without departing from the spirit of the present invention. For example, in order to prevent sliding failure between the cam groove 1056 of the handle arm 1052 and the cam shaft 1060, an example in which the holding portion 1123a is provided around the shaft hole 1122a of the bearing portion 1122 has been described, but the present invention is limited to this. There is nothing. For example, it is possible to provide a holding portion for accumulating grease in the shaft holes 1122c, 1124c and the like of the bearing portion 1122 to prevent sliding failure between the fulcrum pin 1062 and the handle cover 1054 and the like. Further, in the above-described embodiment, as a means for realizing the variable boosting mechanism, the cam groove 1056 is provided in the first section 1056 (1001), the second section 1056 (1002), and the third section 1056 (1003). Although the example composed of three sections has been described, the present invention is not limited to this. For example, the cam groove 1056 may be composed of two sections, a first section 1056 (1001) and a second section 1056 (1002). In this case, for example, the third section 1056 (1003) is configured as the second section 1056 (1002).
[0196]
　At least the following inventions are described herein.
(1)
　A clincher unit having a clincher portion for bending a leg of a staple on one end side and
　a magazine loaded with a bundle of staples to which the staples are connected are provided on the other end side of the clincher unit. A magazine unit rotatably supported with respect to the clincher unit and a
　driver for ejecting staples from the magazine are provided on one end side with the fulcrum shaft as a fulcrum, and the other end side is the fulcrum shaft. A driver unit rotatably supported with respect to the clincher unit
　and a transmission shaft portion provided between the fulcrum shaft portion and the driver are connected to the driver unit with the portion as a fulcrum, and the driver unit is connected to the driver unit. A handle unit that opens and closes and moves in a direction approaching the clincher unit,
　a cam shaft portion provided on either one of the
　clincher unit and the handle unit, and a cam shaft provided on either the clincher unit or the handle unit. A cam groove portion in which one end of the clincher unit and the handle unit is opened along the direction in which the clincher unit and the handle unit are separated from each other and the cam shaft portion is inserted and removed,
　and the handle with respect to the clincher unit and the magazine unit.
　A stayer provided with a guide portion that regulates the movement path of the handle unit with respect to the clincher unit by opening and closing the unit and the driver unit .
(2)
　By opening the handle unit and the driver unit with respect to the clincher unit and the magazine unit, the cam shaft portion is pulled out from the cam groove portion, and the handle unit and the driver unit with
　respect to the clincher unit and the magazine unit. The stayer of
　(1) in which the movement path of the handle unit with respect to the clincher unit is restricted by the guide portion and the cam shaft portion enters the cam groove portion by the closing operation .
(3) The
　guide portion is provided on either one of the clincher unit and the handle unit, and a guide concave portion provided on either one of the clincher unit and the handle unit and into which the guide protrusion is inserted. with a
　stapler (1) or (2).
(4)
　A clincher unit having a clincher portion for bending a leg of a staple on one end side and
　a magazine loaded with a bundle of staples to which the staples are connected are provided on the other end side of the clincher unit. A magazine unit rotatably supported with respect to the clincher unit and a
　driver for ejecting staples from the magazine are provided on one end side with the fulcrum shaft as a fulcrum, and the other end side is the fulcrum shaft. A driver unit that is rotatably supported with respect to the clincher unit with the unit as a fulcrum,
　The
　magazine unit includes a handle unit that is connected to the driver unit by a transmission shaft portion provided between the fulcrum shaft portion and the driver and that opens and closes the driver unit in a direction approaching the clincher unit. A pusher that is movably provided along the longitudinal direction of the
　magazine, a pusher spring that presses the pusher toward the magazine front wall portion of the magazine,
　one end is attached to the pusher, and the other end is the driver. A pusher band attached to the unit and connecting the pusher and the driver unit is provided,
　and the pusher band retracts the pusher by opening the handle unit and the driver unit with respect to the clincher unit and the magazine unit. With the pusher moved to the final retracted position, the length between the inner surface side of the front wall of the magazine and the pusher is 75 mm or more,
　the length of the magazine is 90 mm or more and 100 mm or less, and the
　pusher band A 　stapler having a length of 51 mm or more and 61 mm or less, a length
　from the fulcrum shaft portion to a mounting position of the pusher band with respect to the driver unit of 41 mm or more and 50 mm or less, and a
total length of the
　stapler of 105 mm or more and 125 mm or less .
(5) A
　camshaft portion provided on either one of the clincher unit and the handle unit, and
　It is provided on either one of the clincher unit and the handle unit, and when the cam shaft portion is inserted, one end portion along the direction in which the clincher unit and the handle unit are separated is opened and the cam shaft portion is inserted and removed.
　The stayer of (4) provided with the cam groove part to be made .
(6)
　The ratio of the length of the magazine 30 to the length of the pusher band is 10: 5.7 to 6.1,
　the length of the magazine 30 and the attachment of the pusher band from the fulcrum shaft portion to the driver unit.
　The stapler of (4) or (5) having a length-to-position ratio of 10: 4.6 to 5.0 .
(7)
　An operating member that is displaced by receiving the force of an operator
　, a clincher unit having a clincher groove that bends a staple leg at a front end portion, and the operating member that
　is supported by a hole provided in the clincher unit. A 　stapler 　comprising a shaft portion that supports the stapler ,
　and the
hole portion has a holding portion for storing a lubricating material that reduces friction between the shaft portion and the operating member
.
(8) 　The stapler of (7),
　wherein the holding portion is provided at least in a part around the hole portion
.
(9) The
　holding portion is provided in a concave shape in the radial direction of the hole portion.
　Stapler of (8).
(10) 　The stapler according
　to
(8) or (9), wherein the holding portion is provided in a direction opposite to the direction in which the shaft portion is applied by the load of the operating member .
(11) It
　has a driver which separates and launches the fulcrum loaded into the loading portion, which is connected to the operating member via a connecting portion, and receives the force of the operating member at the connecting portion. A driver unit that is displaced by a rotational operation and
　a magazine unit loaded with staples are provided, the
　clincher unit rotatably supports the driver unit and the magazine unit at a rear end portion, and the
　operating member is the
　above- mentioned operating member. The
　operating member has a guide portion that is slidably engaged with the shaft portion , and the length of the part that receives the force and the fulcrum shaft of the rotational operation, and the length of the part that exerts the force and the fulcrum shaft are determined.
　The stayer according to any one of (7) to (10), which is changed by moving the fulcrum shaft with the operation to change the reduction rate of the load applied to the operating member .
(12) 　The stapler of (8),
　wherein the holding portion is provided in a stepped shape on a surface around the hole portion
.
(13) 　The stapler according to (8),
　wherein the holding portion is provided by expanding the circumferential portion of the hole portion in the radial direction
.
[0197]
　This application is based on Japanese Patent Application No. 2019-005955 filed on January 17, 2019 and Japanese Patent Application No. 2019-005956 filed on January 17, 2019, the contents of which are incorporated herein by reference. ..
Code description
[0198]
1A stapler
2 clincher unit
20 clincher arm
20a clincher part
20b bottom surface
20c side wall
20d fulcrum pin support
20e camshaft support
20f regulation convex part
20g guide convex part (guide part)
21 clincher arm cover
22 fulcrum pin (fulcrum shaft part) )
23 camshaft (camshaft
part) 3 magazine unit
30 magazine
30a magazine side wall portion
30b magazine front wall portion
30c opening
30d fulcrum pin support portion
31 the pusher
31a pressing portions
31b pusher spring locking portion
32 pusher guides
32a staple guide portion
32b pusher Spring guide part
32c Pusher spring locking part
32d Restriction part
33 Pusher spring
34 Pusher band
35 Magazine return spring
4 Driver unit
40 Driver arm
40a Top surface part
40b Side wall part
40c Supporting point pin support part
40d Booster pin support part
41 Driver arm Return spring
42 Driver
43 Staple cover
43a Magazine driver locking part
43b Top surface part
43c Side wall
43d Supporting point pin
43e Opening
43f Mounting part
5 Handle unit
50 Handle arm
50a Top surface
50b Side wall
50c Boosting pin support
50d Cam groove
50e Restricting recess
51 Handle arm cover
51a Guide recess (guide)
51b Finger hook part
6 booster pin (transmission shaft part)
10 Staple
11 Staple bundle
1010 Clincher unit
1012 Clincher arm
1020 Magazine unit
1022 Magazine
1040 Driver unit
1044 Driver
1050 Handle unit (operation member)
1052 Handle arm
1054 Handle cover
1056 Cam groove (guide part)
1060 Cam shaft (shaft part)
1064 times Force pin (connecting part)
1100A, 1100B, 1100C, 1100D Stapla
1122 Bearing part 1122a Shaft
hole (hole part)
1123a, 1123b, 1123c, 1123d Holding part

WE CLAIM

[Claim 1]A clincher unit having a clincher portion for bending the leg portion of the staple on one end side and
　a magazine loaded with a staple bundle to which the staples are connected are provided, and a fulcrum shaft is provided on the other end side of the clincher unit. A magazine unit rotatably supported with respect to the clincher unit and a
　driver for ejecting staples from the magazine are provided on one end side with the portion as a fulcrum, and the other end side has the fulcrum shaft portion as a fulcrum. In addition, a driver unit rotatably supported with respect to the clincher unit
　and a transmission shaft portion provided between the fulcrum shaft portion and the driver are connected to the driver unit, and the driver unit is attached to the clincher unit. A handle unit that opens and closes in an approaching direction,
　a cam shaft portion provided on either one of the clincher unit and the handle unit, and a cam shaft portion provided on either the
　clincher unit or the handle unit, and the cam shaft portion is inserted. At the same time, a cam groove portion in which one end portion along the direction in which the clincher unit and the handle unit are separated is opened and the cam shaft portion is inserted / removed,
　and the handle unit and the magazine unit with respect to the clincher unit and the magazine unit.
　A stayer provided with a guide portion that regulates the movement path of the handle unit with respect to the clincher unit by opening and closing the driver unit .
[Claim 2]
　By opening the handle unit and the driver unit with respect to the clincher unit and the magazine unit, the cam shaft portion is pulled out from the cam groove portion, and the handle unit and the driver unit with
　respect to the clincher unit and the magazine unit. The stayer according to
　claim 1, wherein the movement path of the handle unit with respect to the clincher unit is restricted by the guide portion by the closing operation, and the cam shaft portion enters the cam groove portion .
[Claim 3]
　The guide portion is provided with a guide convex portion provided on either one of the clincher unit and the handle unit, and a guide concave portion provided on either one of the clincher unit and the handle unit and into which the guide convex portion is inserted.
　The stapler according to claim 1 or 2.
[Claim 4]
　It has a clincher unit having a clincher portion for bending a leg of a stapler on one end side, and a
　magazine loaded with a bundle of staples to which the staples are connected, and a fulcrum shaft on the other end side of the clincher unit. A magazine unit rotatably supported with respect to the clincher unit and a
　driver for ejecting staples from the magazine are provided on one end side with the portion as a fulcrum, and the other end side has the fulcrum shaft portion as a fulcrum. In addition, a driver unit rotatably supported with respect to the clincher unit
　and a transmission shaft portion provided between the fulcrum shaft portion and the driver are connected to the driver unit, and the driver unit is connected to the clincher unit. The
　magazine unit includes a handle unit that opens and closes and moves in an approaching direction, and the magazine unit includes a pusher that is movably provided along the longitudinal direction of the
　magazine, a pusher spring that presses the pusher toward the front wall of the magazine of the magazine , and a pusher spring.
　One end is attached to the pusher, the other end is attached to the driver unit, and the pusher band for connecting the pusher and the driver unit is provided,
　and the handle for the clincher unit and the magazine unit. The length between the inner surface side of the magazine front wall portion and the pusher in a state where the pusher is retracted by the pusher band by the operation of opening the unit and the driver unit and the pusher is moved to the final retracted position 75 mm or more,
　the length of the magazine is 90 mm or more and 100 mm or less,
　The following 61mm is 51mm or more the length of the Pusshabando,
　length from the fulcrum shaft portion to the mounting position of the Pusshabando to said driver unit is 50mm or less than 41mm,
　the overall length of the stapler is 125mm or less than 105mm
　stapler ..
[Claim 5]
　A cam shaft portion provided on either one of the
　clincher unit and the handle unit and a cam shaft portion provided on either one of the clincher unit and the handle unit are inserted, and the clincher unit and the handle unit are inserted. The stayer according to
　claim 4, further comprising a cam groove portion in which one end portion along the direction of separation is opened and the cam shaft portion is inserted / removed .
[Claim 6]
　The ratio of the length of the magazine 30 to the length of the pusher band is 10: 5.7 to 6.1,
　and the length of the magazine 30 to the mounting position of the pusher band with respect to the driver unit from the fulcrum shaft portion.
　The stapler according to claim 4 or 5, wherein the length ratio is 10: 4.6 to 5.0