STAPLER
BACKGROUND OF THE INVENTION

5 [0001]
The present invention relates to a stapler.

[0002]
10 A stapler includes a magazine to which staples are charged, a pusher for
pressing the staples, and a pusher-spring for urging the pusher.
[0003]
In the stapler disclosed in Patent Document 1 (JP-Y-36-014408), a tension coil
spring is used as a pusher-spring . In the stapler, a member for guiding the
15 pusher-spring is not provided, and, staples are guided by a magazine side wall of the
magazine. Accordingly, a number of components is reduced.
[0004]
In the stapler where a guide of the staples is not provided in the magazine,
there are cases where the staples roll in the magazine when the staples are charged.
20 In addition, if a few of staples are left in the magazine, there are cases where the left
staples roll in the magazine in an operation of retreating the pusher.
[0005]
In the stapler where the pusher-spring for urging the pusher is constituted by
the tension coil spring, when the pusher is retreated, the pusher-spring is exposed to a
25 space to which staples are charged. Therefore, it is difficult to remove staples in a
rolling ,state. In addition, if staples caught in the pusher-spring are to be removed,
there is a concern that the pusher-spring may extend exceeding an allowable stress,
and thus the pusher-spring may lose its function.
[0006]
30 On the other hand, a stapler using a compression coil spring as the
pusher-spring is also known. In the stapler where the pusher-spring for urging the
pusher is constituted by the compression coil spring, if the pusher is retreated, a shaft
which guides the pusher-spring is exposed to a space to which staples are charged.
-1-
F705
Therefore, it is difficult to remove staples in a rolling state.
[0007]
The stapler disclosed in Patent Document 2 (JP-,A-2009-012093) includes a
guide member for guiding a pusher, staples and a pusher-spring.
s [0008]
In the stapler of Patent Document 2, by the guide member, the staples are
prevented from rolling in the magazine. However, time is taken for a task of attaching
the pusher-spring constituted by a tension coil spring in a U shape.
[0009]
10 In the configuration of using a tension coil spring as a spring for urging the
pusher, typically, there is a necessity of a process where a hook at one end of the
spring is caught in the pusher and is tensioned, and a hook at the other end of the
spring is caught in the guide side. Thus, it takes time to attach the spring. In addition,
the tension coil spring is expensive as compared with the compression coil spring and
is causes high costs due to increases in a component price and assembling time.
[0010]
Further, a conventional stapler includes a metal link member for connecting the
pusher and the handle, in a mechanism for interlocking opening and closing of a
handle with a retreating of the pusher.
20 [0011]
On the other hand, the stapler of Patent Document 2 includes a resin
pusher-band as a member for connecting the pusher and the handle. By using a resin
made pusher-band, component costs can be reduced.
[0012]
25 When the pusher and the handle side are connected to each other using the
sheet-shaped pusher-band made of a resin material, the pusher-band is attached to
the pusher using a separate component, or the pusher-band is attached to a rear
surface side of the pusher as disclosed in Patent Document 2.
[0013]
30 However, if the separate component is used, component costs are increased.
On the other hand, if the pusher-band is attached to the rear surface side of the pusher,
a process of attaching the pusher-band is complicated, and thus costs due to the
process of the attaching the pusher-band are increased.
-2-
F705
[0014]
For these reasons, it has been difficult to provide a configuration of interlocking
opening and closing of the handle with retreating of the pusher.
s SUMMARY OF THE INVENTION
[0015]
Embodiments of the invention relate to a stapler in which an operation of
charging and extracting staples is easily and reliably carried out, and a configuration of
interlocking opening and closing of a handle with retreating of a pusher can be
io mounted at low costs.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016]
Fig. 1 is an exploded perspective view illustrating an example of the stapler
is according to a first embodiment.
Fig. 2 is a perspective view illustrating an example of the stapler according to
the first embodiment.
Fig. 3 is a plan view illustrating an example of the magazine assembly
according to the first embodiment.
20 Fig. 4 is a side view illustrating an example of the magazine assembly
according to the first embodiment.
Fig. 5 is a side cross-sectional view illustrating an example of the magazine
assembly according to the first embodiment.
Fig. 6 is a front cross-sectional view illustrating an example of the magazine
25 assembly according to the first embodiment.
Fig. 7 is a plan view illustrating an example of the guide member constituting
the magazine assembly according to the first embodiment.
Fig. 8 is a side view illustrating an example of the guide member constituting
the magazine assembly according to the first embodiment.
30 Fig. 9 is a side cross-sectional view illustrating an example of the guide member
constituting the magazine assembly according to the first embodiment.
Fig. 10 is a front view illustrating an example of the guide member constituting
the magazine assembly according to the first embodiment.
-3-
F705
Figs. 11(a) and 11(b) are diagrams illustrating an example of the entire
configuration of the pusher retreat mechanism according to the first embodiment.
Figs. 12(a) and 12(b) are diagrams illustrating an example of the pusher
according to the first embodiment.
s Figs. 13(a) and 13(b) are diagrams illustrating a configuration of main parts of a
driver according to the first embodiment.
Figs. 14(a) to 14(c) are perspective views illustrating an example of the process
of mounting a pusher-band in a pusher according to the first embodiment.
Figs. 15(a) to 15(c) are side cross-sectional views illustrating an example of the
10 process of mounting the pusher-band in the pusher according to the first embodiment.
Figs. 16(a) and 16(b) are perspective views illustrating an example of the
process of mounting the pusher-band in the driver according to the first embodiment.
Figs. 17(a) and 17(b) are broken perspective views illustrating an example of
the process of mounting the pusher-band in the driver according to the first
is embodiment.
Figs. 18(a) and 18(b) are diagrams illustrating a configuration of main parts of a
driver according to a modified example of the first embodiment.
Figs. 19(a) and 19(b) are diagrams illustrating a pusher and a pusher-band
according to a modified example of the first embodiment.
20 Fig. 20 is an exploded perspective view illustrating an example of the stapler
according to a second embodiment.
Fig. 21 is a plan view illustrating an example of the magazine assembly
according to the second embodiment.
Fig. 22 is a side view illustrating an example of the magazine assembly
25 according to the second embodiment.
Fig. 23 is a side cross-sectional view illustrating an example of the magazine
assembly according to the second embodiment.
Fig. 24 is a front cross-sectional view illustrating an example of the magazine
assembly according to the second embodiment.
30 Fig. 25 is a plan view illustrating an example of the guide member constituting
the magazine assembly according to the second embodiment.
Fig. 26 is a side view illustrating an example of the guide member constituting
the magazine assembly according to the second embodiment.
^4-
F705
Fig. 27 is a side cross-sectional view illustrating an example of the guide
member constituting the magazine assembly according to the second embodiment.
Fig. 28 is a front view illustrating an example of the guide member constituting
the magazine assembly according to the second embodiment.
5
DETAILED DESCRIPTI ON OF THE EMBODIMENTS
[0017]

Fig. 1 is an exploded perspective view illustrating an example of the stapler
io according to the first embodiment, and Fig. 2 is a perspective view illustrating an
example of the stapler according to the first embodiment. The stapler 1A includes a
magazine 2A in which staples 10 are charged.
[0018]
Each of the staples 10 charged in the magazine 2A includes a needle crown
is IOa, and two legs 1Ob which are bent so as to be approximately parallel to each other
in one direction from both ends of the needle crown 10a. A plurality of staples 10
integrally bond together and form a series of staples 10.
[0019]
The stapler 1A includes a pusher 3A which presses the staples 10 charged in
20 the magazine 2A in the line width direction perpendicular to the needle crown 1 Oa, and
a pusher-spring 4 which presses the pusher 3A.
[0020]
The stapler 1A includes a guide member 5A which is integrally formed with a
spring-guide 50A which guides the pusher-spring 4 and a pusher-guide 51A which
25 guides a movement of the pusher 3A and also guides charging and extracting of the
staples 10. The stapler 1A includes a driver 6 which separates and drives the staples
10 charged in the magazine 2A one by one, and an upper handle 7 provided with the
driver 6.
[0021]
30 The stapler IA includes a clincher 80 which bends the legs 10b of the staple 10
penetrating through paper sheets, and a lower handle 8 where the magazine 2A and
the upper handle 7 are rotatably supported by the shaft 81. The stapler 1A includes a
pusher-band 9 which transmits an opening operation of the upper handle 7 to the
-5-
F705
pusher 3A so as to retreat the pusher 3A.
[0022]
By attaching the guide member 5A inside the magazine 2A in a condition that
the pusher-spring 4 is attached to the spring-guide 50A and the pusher 3A is mounted
s at the pusher-guide 51A, a magazine assembly 11A is configured.
[0023]
The magazine assembly 11A is rotatably attached to the lower handle 8 through
the shaft 81. The upper handle 7 is also rotatably attached to the lower handle 8 and
the magazine assembly 11A through the shaft 81.
10 [0024]
The driver 6 is mounted in the upper handle 7. By an operation of holding the
upper handle 7 and the lower handle 8, paper sheets P are pinched between the
magazine 2A and the clincher 80 of the lower handle 8, and a single staple 10 is driven
from the magazine 2A by the driver 6.
is [0025]
The single staple 10 driven from the magazine 2A penetrates through the paper
sheets P pinched between the magazine 2A and the clincher 80 and is bent by the
clincher 80, thereby binding the paper sheets P.
[0026]
20 The pusher 3A is connected to the driver 6 on the upper handle 7 side via the
pusher-band 9. By an opening operation of the upper handle 7 around the shaft 81,
the pusher 3A is pulled and is retreated by the pusher-band 9 while compressing the
pusher-spring 4. Thereby, the staples 10 can be charged in the magazine 2A.
[0027]
25 The spring-guide 50A and the pusher-guides 51A are provided at both sides of
the pusher-spring 4. Thereby, the staples 10 are prevented from being caught in the
spring-guide 50A, the pusher-spring 4, or the like in an operation of charging or
extracting the staples 10 in or from the magazine 2A.
[0028]
30 In an operation of closing the upper handle 7 around the shaft 81, the pusher
3A is pressed by a restoring force of the pusher-spring 4, and, in turn, the staples 10
charged in the magazine 2A are pressed.
[0029]
-6-
F705
The upper handle 7 includes a main body portion 70 which is formed in a
predetermined shape through a bending process of a plate-shaped metal material such
as a press process, and covers 71a and 71b made of resin. The upper handle 7
includes a fixing mechanism (not shown) where the driver 6 is mounted at the lower
s surface of a main body portion 70. The upper handle 7 includes locking convex
portions 72 locked to the magazine 2A and a bearing portion (not shown) locked to the
shaft 81 at the facing side wall portions of the main body portion 70.
[0030]
The lower handle 8 includes a main body portion 82 which is formed in a
io predetermined shape through a bending process of a plate-shaped metal material such
as a press process and a cover 83 made of resin. The lower handle 8 includes the
clincher 80 at the front end side of the main body portion 82. The clincher 80 is
constituted by integrally forming a groove portion guiding the legs 1 Ob of the staple 10
with the main body portion 82.
is [0031]
The lower handle 8 includes a pair of side wall portions 84 at the rear end side
of the main body portion 82, and shaft hole portions 84a into which the shaft 81 is
inserted are formed so as to penetrate through the facing side wall portions 84. In the
lower handle 8, locking convex portions 84b which are locked to the magazine 2A are
20 formed so as to protrude inside of the facing side wall portions 84.
[0032]

Figs. 3 to 6 show an example of the magazine assembly constituting the stapler
according to the first embodiment, and, next, the magazine 2A constituting the
25 magazine assembly 11A according to the first embodiment will be described.
[0033]
`Fig. 3 is a plan view illustrating an example of the magazine assembly
according to the first embodiment , and Fig. 4 is a side view illustrating an example of
the magazine assembly according to the first embodiment . Fig. 5 is a side
30 cross-sectional view illustrating an example of the magazine assembly according to the
first embodiment , and Fig. 6 is a front cross -sectional view illustrating an example of
the magazine assembly according to the first embodiment.
[0034]
-7-
F705
The magazine 2A includes a magazine bottom 20a on which the staples 10 are
placed. The magazine 2A includes magazine side walls 20b which regulate a position
in the width direction along the needle crown 10a of the staple 10, and a magazine
front wall 20c which regulates a position in the front-back direction along the line width
s direction of the staples 10. The magazine 2A includes a staple cover 20d which
regulates a vertical position along the legs 10b of the staple 10.
[0035]
The magazine 2A is provided with a space which is formed in a predetermined
shape by being bent through shaping and bending processes of a plate-shaped metal
io material such as a press process, and an upper surface thereof is open such that the
staples 10 can be charged therein. In other words, in the magazine 2A, both side
portions of the magazine bottom 20a are bent in the upper direction which is one
direction, and thereby a pair of magazine side wall 20b is constituted in a form of
standing from both the side portions of the magazine bottom 20a.
15 [0036]
In the magazine 2A, the inner width of the facing magazine side walls 20b is
configured to be substantially the same as the outer width of the needle crown 10a of
the staple 10 such that the staples 10 can be inserted thereinto, and the staples 10 can
be charged between the facing magazine side walls 20b and a position in the width
20 direction of the charged staples 10 is regulated.
[0037]
The upper end portion on the front end side of each magazine side wall 20b is
bent inwardly, and thereby the staple covers 20d are formed in a form of protruding
inwardly from the magazine side walls 20b.
25 [0038]
The inner width of the facing staple covers 20d is configured to be smaller than
the outer width of the needle crown 10a of the staple 10. The magazine 2A is
configured such that a gap between the magazine bottom 20a and the staple covers
20d is configured to be substantially the same as the length of the legs 10b of the
30 staple 10 such that the staples 10 can be inserted therebetween.
[0039]
The length of the staple covers 20d is configured to be larger than that of a
series of connected staples 10. The size of the pusher 3A, the length of the magazine
F705
2A, and the like are set such that two series of staples 10 can be charged in a state
where the pusher-spring 4 is compressed and the pusher 3A is retreated up to the
most retreated position. For this reason, when two series of staples 10 are charged in
the magazine 2A, both ends in the width direction of the needle crown 10a of the first
5 series of staples 10 are regulated over the entire length, and a portion of the front end
side of the second series of staples 10 is regulated.
[0040]
Thereby, in the magazine 2A, the staples 10 can be charged between the
magazine bottom 20a and the staple covers 20d, and thus a vertical movement of the
10 charged staples 10 is regulated and the staples 10 are prevented from releasing
between the facing staple covers 20d. Even if two series of staples 10 are charged, a
vertical movement of the charged staples 10 is regulated without providing another
cover.
[0041]
is Further, in the magazine 2A, the front end side of each of the magazine side
walls 20b is bent inwardly, and thereby the magazine front wall 20c is constituted in a
form of closing the front ends of the facing magazine side walls 20b. An opening
portion 20e is provided with the dimension where a separate staple 10 passes
therethrough at the lower part of the magazine front wall 20c on the front end side of
20 the magazine bottom 20a.
[0042]
Thereby, in the magazine 2A, the front end in the line width direction of the
staples 10 is pressed against the magazine front wall 20c, thus a position in the
front-back direction of the staples 10 is regulated, and thereby a position of a single
25 staple 10 at the frontmost end is regulated.
[0043]
The magazine 2A includes locking convex portions 21 which hold the upper
handle 7 at a closed position. The locking convex portions 21 protrude outwardly from
the facing magazine side walls 20b, and are locked to the locking convex portions 72 of
30 the upper handle 7.
[0044]
The magazine 2A includes locking concave portions 22 which hold the lower
handle 8 at the closed position. The locking concave portions 22 are formed by
-9-
F705
providing openings at the facing magazine side walls 20b, and are locked to locking
convex portions 84b of the lower handle 8.
[0045]
The magazine 2A also includes opening portions 23 which adjust a load applied
s to the upper handle 7 in an operation of locking the upper handle 7 to the locking
convex portions 21. The opening portions 23 are formed by providing openings at the
facing magazine side walls 20b such that portions at which the locking convex portions
21 of the magazine side walls 20b are provided are deformed by a desired load. In
this example, the locking concave portions 22 and the opening portions 23 are
10 integrally formed.
[0046]
The magazine 2A includes checking windows 24 through which whether or not
the staples 10 are charged and how many staples 10 are left can be checked. The
checking windows 24 are formed by providing long hole-shaped openings in this
is example at the front end sides of the facing magazine side walls 20b such that the
staples 10 charged in the magazine 2A are viewed.
[0047]
The magazine 2A includes hole portions 25 into which the shaft 81 is inserted.
The hole portions 25 are formed by providing circular through-holes conforming to the
20 diameter of the shaft 81 at the rear end side of the facing magazine side walls 20b.
[0048]
The magazine 2A includes a first support portion 26a and a second support
portion 26b which support the guide member 5A. The first support portion 26a is
constituted in a form of standing from the magazine bottom 20a at the front end side of
25 the magazine 2A, and, in this example, is integrally formed with a rectangular piece
portion provided with a circular through-hole in a form of bending and raising the
magazine bottom 20a.
[0049]
The second support portion 26b is constituted in a form of standing from the
30 magazine bottom 20a at the rear end side of the magazine 2A, and, in this example, is
integrally formed with a rectangular piece portion provided with a circular through-hole
in a form of bending and raising the magazine bottom 20a.
[0050]
10-
F705
Figs. 7 to 10 show an example of the guide member according to the first
embodiment, and, next, the guide member 5A constituting the magazine assembly 11A
according to the first embodiment will be described. Fig. 7 is a plan view illustrating
an example of the guide member constituting the magazine assembly according to the
5 first embodiment, and Fig. 8 is a side view illustrating an example of the guide member
constituting the magazine assembly according to the first embodiment.
[0051]
Fig. 9 is a side cross-sectional view illustrating an example of the guide member
constituting the magazine assembly according to the first embodiment. Fig. 10 is a
to front view illustrating an example of the guide member constituting the magazine
assembly according to the first embodiment.
[00521
The guide member 5A is made of a resin material such as plastic, the
pusher-guides 51A are provided at both sides of the spring-guide 50A, and, the
15 spring-guide 50A and the pusher-guides 51A extend in the longitudinal direction of the
magazine 2A.
[0053]
In the guide member 5A, a pair of pusher-guides 51A are arranged in parallel
with a gap slightly shorter than the inner width of the needle crown 10a of the staple 10,
20 and the front end sides of the spring-guide 50A and the pusher-guides 51A are
integrally connected to each other by a first connecting portion 52a with a shape
connecting the left and right pusher-guides 51A. The rear end sides of the
pusher-guides 51A are integrally connected to each other by a second connection
portion 52b with a shape connecting the left and right pusher-guides 51A.
25 [0054]
The spring-guide 50A has the front end side supported by the first connecting
portion 52a in a columnar shape, a prismatic shape, or the like into which the
pusher-spring 4 can be inserted and is constituted by a compression coil spring which
receives the compressive load and extends with the restoring force against the elastic
30 deformation due to the compression.
[0055]
In the spring-guide 50A, a first shaft portion 53a inserted into the first support
portion 26a of the magazine 2A is provided in a form of protruding from the front side of
-11-
F705
the first connecting portion 52a. A second shaft portion 53h inserted into the second
support portion 26b of the magazine 2A is provided at the rear end part of the
spring-guide 50A.
[0056]
s The pusher-guides 51A include guide convex portions 54 which guide the
pusher 3A. The guide convex portions 54 have convex portions which protrude
outwardly from the side parts of the pusher-guides 51A and are provided in the
longitudinal direction of the pusher-guides 51A in accordance with a movable range of
the pusher 3A.
10 [0057]
The pusher-guides 51A include shaft contact portions 55a which fix the guide
member 5A to the magazine 2A. The shaft contact portions 55a are formed by
providing step portions 55b at the rear end side of the pusher-guides 51A.
[0058]
is The guide member 5A is formed in a shape which can be integrally molded
without using a slide mold, thus costs for the mold are reduced, and thereby it is
possible to decrease component costs.
[0059]
In the magazine assembly 11A, when the guide member 5A is mounted in the
20 magazine 2A, and the shaft 81 is inserted into the hole portions 25 of the magazine 2A,
the step portions 55b enter the lower side of the shaft 81 and the shaft contact portions
55a come into contact with the shaft 81. Thereby, the rear end side of the guide
member 5A is fixed to the magazine 2A.
[0060]
25
Figs. 11(a) to 13(b) show an example of the pusher retreat mechanism
according to the first embodiment, and, next, configurations of the pusher, the driver,
and the pusher-band constituting the pusher retreat mechanism according to the first
embodiment will be described.
30 [0061]
Figs. 11(a) and 11(b) show an example of the entire configuration of the pusher
retreat mechanism according to the first embodiment. Fig. 11(a) is a plan view
illustrating an example of the entire configuration of the pusher retreat mechanism
12-
F705
according to the first embodiment. Fig. 11(b) is a side cross-sectional view illustrating
an example of the entire configuration of the pusher retreat mechanism according to
the first embodiment.
[0062]
s Figs. 12(a) and 12(b) show an example of the pusher according to the first
embodiment. Fig. 12(a) is a plan view illustrating an example of the pusher according
to the first embodiment. Fig. 12(b) is a side cross-sectional view illustrating an
example of the pusher according to the first embodiment.
[0063]
10 Figs. 13(a) and 13(b) show an example of the configuration of the main parts of
the driver which is a portion to which the pusher-band is locked. Fig. 13(a) is a plan
view illustrating an example of the configuration of the main parts of the driver
according to the first embodiment. Fig. 13(b) is a side cross-sectional view illustrating
an example of the configuration of the main parts of the driver according to the first
1s embodiment.
[0064]
The pusher 3A includes pressing portions 30a which press the staples 10, a
spring pressing portion 30b which is pressed against the pusher-spring 4, and a guide
grooves 31 which are guided by the pusher-guides 51A of the guide member 5A.
20 [0065]
The pusher 3A includes a band locking portion 32 to which the pusher-band 9 is
locked, and a band falling-out preventing portion 33 which prevents the pusher-band 9
locked to the band locking portion 32 from releasing from the pusher 3A.
[0066]
25 The pressing portion 30a is formed in a shape which protrudes forward from
both the left and right sides of the front end side of the pusher 3A, and presses the two
legs 10b of the staple 10. The spring pressing portion 30b enters between a pair of
pusher-guides 51A inside of the pusher 3A covering the pusher-guides 51A, and is
formed by providing a hole portion inserted into the spring-guide 50A.
30 [0067]
The guide grooves 31 are fitted into the guide convex portions 54 of the
pusher-guides 51A at a portion opposite to the side part of the outside of each of the
pusher-guides 51A inside the pusher 3A covering the pusher-guides 51A, and is
-13-
F705
formed by providing depressed grooves in the movement direction of the pusher 3A.
[0068]
The band locking portion 32 includes a locking convex portion 32a, protruding
toward the upper surface of the pusher 3A, into which a first locking hole portion 90 of
5 the pusher-band 9 is inserted, and a falling-out preventing convex portion 32b which
protrudes forward from the upper end of the locking convex portion 32a and which
prevents the first locking hole portion 90 of the pusher-band 9 from releasing from the
locking convex portion 32a.
[0069]
10 The band falling-out preventing portion 33 includes a butting convex portion 33a
which protrudes toward the upper surface of the pusher 3A further on the front side
than the band locking portion 32 and butts against the pusher-band 9, and a falling-out
preventing convex portion 33b which protrudes backward from the upper end of the
butting convex portion 33a and prevents the front end of the pusher-band 9 from
1s releasing from the butting convex portion 33a.
[0070]
The driver 6 includes a driver portion 60 which drives the staples 10, a
magazine return spring 61a which restores the magazine 2A with respect to the upper
handle 7, and a lower handle return spring 61 b which restores the lower handle 8 with
20 respect to the upper handle 7 and the magazine 2A.
[0071]
The driver 6 includes a band locking portion 62 to which the pusher-band 9 is
locked, and a band falling-out preventing portion 63 which prevents the pusher-band 9
locked to the band locking portion 62 from releasing from the driver 6.
25 [0072]
The driver 6 is mounted on the lower surface of the upper handle 7, and the
driver portion 60 protrudes downwardly from the front end side of the upper handle 7.
The driver portion 60 has the width which are substantially the same as the outer width
of the needle crown 10a of the staple 10, has the plate thickness which is substantially
30 the same as the line width of the staple 10, and is inserted between the facing
magazine side walls 20b of the magazine 2A along the magazine front wall 20c.
[0073]
In the driver 6, the magazine return spring 61a and the lower handle return
-14--
F705
spring 61b protrude downwardly from the rear end side of the upper handle 7. The
magazine return spring 61a comes into contact with one of the magazine side walls
20b of the magazine 2A in a state of closing the upper handle 7, and is pressed in an
operation of holding the upper handle 7 and the lower handle 8. The lower handle
s return spring 61b comes into contact with one of the side wall portions 84 of the lower
handle 8 in a state of closing the lower handle 8, and is pressed in an operation of
holding the upper handle 7 and the lower handle 8.
[0074]
The band locking portion 62 protrudes toward the hole portion 64 penetrating
io through the driver 6 and to which a second locking hole portion 91 of the pusher-band
9 is fitted. The band locking portion 62 includes a locking piece portion 62a against
which the second locking hole portion 91 butts. The locking piece portion 62a forms a
step protruding from a surface of the driver 6 at the height equivalent to the plate
thickness of the driver 6.
1s [0075]
The band falling-out preventing portion 63 is provided on another side of the
hole portion 64, and forms a step protruding from the surface of the driver 6 at the
height equivalent to the plate thickness of the driver 6 at a portion further forward of the
band locking portion 62.
20 [0076]
The pusher-band 9 is made of a resin material with a sheet shape, a film shape,
or the like, and can be bent in any shape between the pusher 3A and the driver 6. A
length from the front end to the first locking hole portion 90 of the pusher-band 9 is
substantially equivalent to A length between the butting convex portion 33a of the band
25 falling-out preventing portion 33 of the pusher 3A and the locking convex portion 32a of
the band locking portion 32. The first locking hole portion 90 is formed in a long hole
shape into which the falling-out preventing convex portion 32b protruding from the band
locking portion 32 can be inserted.
[0077]
30 A length from the rear end to the second locking hole portion 91 of the
pusher-band 9 is substantially equivalent to the length between the band locking
portion 62 and the band falling-out preventing portion 63 of the driver 6. The second
locking hole portion 91 is formed in a shape into which the locking piece portion 62a
-15-
F705
protruding from the band locking portion 62 of the driver 6 can be inserted.
[0078]

5 An assembling process of the magazine assembly 11A according to the first
embodiment will be described.
[0079]
First, the pusher 3A is mounted at the pusher-guides 51A of the guide member
5A. The guide grooves 31 are fitted into the guide convex portions 54 of the
10 pusher-guides 51A, the spring pressing portion 30b is inserted into the spring-guide
50A of the guide member 5A, and thereby the pusher 3A is mounted so as to be
movable along the spring-guide 50A and the pusher-guides 51 A.
[0080]
Next, the pusher-spring 4 is mounted at the spring-guide 50A of the guide
15 member 5A. The pusher-spring 4 is inserted into the spring-guide 50A into which the
spring pressing portion 30b of the pusher 3A is inserted, and thereby the front end side
in the axial direction of the coil comes into contact with the pusher 3A.
[0081]
The guide member 5A mounted with the pusher 3A and the pusher-spring 4 is
20 mounted in the magazine 2A. First, the second shaft portion 53b of the spring-guide
50A of the guide member 5A is inserted into the second support portion 26b of the
magazine 2A. Next, the guide member 5A is retreated while the pusher-spring 4 is
compressed such that the first shaft portion 53a is aligned with the first support portion
26a of the magazine 2A.
25 [0082]
In addition, the guide member 5A is advanced, and thereby the first shaft
portiorr53a is inserted into the first support portion 26a of the magazine 2A. Thereby,
the first shaft portion 53a is supported by the first support portion 26a of the magazine
2A at the front end side of the guide member 5A, and the second shaft portion 53b is
30 supported by the second support portion 26b of the magazine 2A at the rear end side
thereof.
[0083]
In the configuration of using a tension coil spring in a spring pressing the pusher,
-16-
F705
typically, there is a necessity of a process where one end hook of the spring is caught
in the pusher and is tensioned, and the other hook of the spring is caught in the guide
side, and thus it takes time to mount the spring.
[0084]
5 In contrast, in the magazine assembly 11A according to the first embodiment,
the pusher-spring 4 may be simply inserted into the spring-guide 50A in a process of
mounting the pusher-spring 4 in the guide member 5A, and it is possible to reduce time
for the assembling as compared with the configuration of using the tension coil spring.
[0085]
10 The mounting of the guide member 5A in the magazine 2A can be performed in
a process equivalent to that of a stapler in the related art where a shaft-like
spring-guide is mounted at a support portion of the magazine, and thus can be
performed through the task equivalent to that in the related art without increasing time
for mounting in the magazine 2A even in the guide member 5A where the spring-guide
is 50A and the pusher-guides 51A are integrally molded.
[0086]

In the magazine assembly 11A assembled as described above, the shaft hole
20 portions 84a of the lower handle 8 are aligned with the hole portions 25 of the
magazine 2A, and the shaft 81 is inserted into the holes and is calked.
[0087]
When the shaft 81 is inserted into the hole portions 25 of the magazine 2A, the
step portions 55b of the guide member 5A enter the lower side of the shaft. 81, and the
25 shaft contact portions 55a come into contact with the shaft 81. Thereby, the rear end
side of the guide member 5A is fixed to the magazine 2A.
[00881-
In the magazine assembly 11A where the guide member 5A is mounted in the
magazine 2A, the spring-guide 50A is aligned in an approximate central line shape of
30 the magazine 2A, and the pusher-guides 51A are integrally disposed with the
spring-guide 50A at the spring-guide 50A and both the left and right sides of the
pusher-spring 4.
[0089]
-17-
F705
The height of the pusher-guides 51A is substantially equivalent to the
spring-guide 50A and is smaller than the length of the legs 10b of the staples 10. In
addition, a space larger than the line width of the staple 10 is formed between the
pusher-guides 51A and the magazine side walls 20b. Further, a space which is
s equivalent to or larger than the line width of the staple 10 is formed between the front
ends of the pusher-guides 51A and the magazine front wall 20c.
[0090]
In the stapler 1A, in an operation of opening the upper handle 7 using the shaft
81 as a supporting point, the pusher-spring 4 is compressed and the pusher 3A is
10 pulled to be retreated by the pusher-band 9, and then a space in which the staples 10
can be charged is formed between the pusher 3A and the magazine front wall 20c.
[0091]
In the configuration of using a compression coil spring as the pusher-spring 4,
since the pusher-spring 4 is compressed by retreating the pusher 3A, the pusher-spring
1s 4 is not exposed to a space in which the staples 10 is charged inside the magazine 2A.
In addition, the spring-guide 50A exposed to the space in which the staples 10 are
charged inside the magazine 2A is provided with the pusher-guides 51A at both sides.
[0092]
Thereby, in an operation of charging or extracting the staples 10 in or from the
20 magazine 2A, the legs 10b of the staples 10 are guided in a space between the
pusher-guides 51A and the magazine side walls 20b, and thus the staples 10 are
prevented from being caught in the spring-guide 50A, the pusher-spring 4, or the like.
[0093]
In addition, in the stapler 1A, in an operation of opening the upper handle 7
25 using the shaft 81 as a supporting point, when the pusher 3A is pulled by the
pusher-band 9, not only the force moving the pusher 3A along the pusher-guides 51A
but also the force in a direction of raising the pusher 3A from the pusher-guides 51A
are applied to the pusher 3A.
[0094]
30 Since the guide grooves 31 are fitted into the guide convex portions 54 of the
pusher-guides 51A, the pusher 3A is prevented from releasing from the pusher-guides
51A even if the force in the direction of raising the pusher 3A from the pusher-guides
51 A.
-18-
F705
[0095]
In addition, the front end sides of the pusher-guides 51A are fixed to the
magazine 2A since the first shaft portion 53a which is integrally molded with the first
s connecting portion 52a are supported by the first support portion 26a of the magazine
2A. In addition, as described above, the step portions 55b of the pusher-guides 51A
enter the lower side of the shaft 81, the shaft contact portions 55a come into contact
with the shaft 81, and thereby the rear end side thereof is fixed to the magazine 2A.
[0096]
10 Thereby, even if the force in the direction of raising the pusher 3A from the
pusher-guides 51A is applied, the guide member 5A having the pusher-guides 51A is
prevented from releasing from the magazine 2A, and the pusher-guides 51A are
prevented from being significantly deformed.
[0097]
15 In addition, since a space which is equivalent to or larger than the line width of
the staple 10 is formed between the front ends of the pusher-guides 51A and the
magazine front wall 20c, a separate staple 10 is prevented from falling backward.
[0098]
Generally, in a small-sized stapler in which staples with short legs are charged,
20 the staples are supported by the bottom of the magazine, and, thus, in a configuration
where a guide of the staples is provided in the magazine, the guide does not require
intensity. On the other hand, in a medium or large-sized staler in which staples having
long legs and staples having short legs can be charged, there are many configuration
where the needle crowns of the staples are supported by the guide. For this reason,
25 the guide requires intensity.
[0099]
in the stapler 1A according to the first embodiment, since the staple 10 is
supported by the magazine bottom 20a, a strong force is not applied to the guide
member 5A due to the driving of the driver 6. For this reason, in the guide member 5A,
30 the spring-guide 50A and the pusher-guides 51A can be integrally molded using a resin
material such as plastic.
[0100]

_19_
F705
Figs. 14(a) to 14(c) are perspective views illustrating an example of the process
of mounting a pusher-band in a pusher according to the first embodiment. Figs. 15(a)
to 15(c) are side cross-sectional views illustrating an example of the process of
mounting the pusher-band in the pusher according to the first embodiment. A process
5 of mounting the pusher-band 9 according to the first embodiment in the pusher 3A will
be described.
[0101]
In a state where the magazine assembly 11A assembled as described above,
the lower handle 8, and the upper handle 7 mounted with the driver 6 are integrally
io assembled via the shaft 81; when the upper handle 7 is opened, as shown in Fig. 11(a),
the band locking portion 32 and the band falling-out preventing portion 33 of the pusher
3A and the band locking portion 62 and the band falling-out preventing portion 63 of the
driver 6 are exposed.
[0102]
is When the pusher-band 9 is mounted in the pusher 3A, if a direction indicated by
the arrow F1 in Fig. 11(a) is the front side of the pusher 3A, a position of the
pusher-band 9 is adjusted with respect to the band locking portion 32 of the pusher 3A
in a state where the first locking hole portion 90 with a long hole shape is deviated
forward. In addition, as shown in Figs. 14(a) and 15(a), the band locking portion 32 of
20 the pusher 3A is inserted into the first locking hole portion 90 of the pusher-band 9. In
this state, the front end side of the pusher-band 9: is put on the band falling-out
preventing portion 33 of the pusher 3A.
[0103]
Next, as shown in Figs. 14(b) and 15(b), the pusher-band 9 is pulled backward.
25 When the pusher-band 9 is pulled backward, the first locking hole portion 90 with a
long hole shape is moved backward with respect to the band locking portion 32 of the
pusher 3A, and the front end of the first locking hole portion 90 butts against the locking
convex portion 32a of the band locking portion 32. In addition, the edge of the front
end side of the first locking hole portion 90 is pressed by the falling-out preventing
30 convex portion 32b of the band locking portion 32.
[0104]
Next, as shown in Figs. 14(c) and 15(c), the pusher-band 9 is pulled backward,
and the front end of the pusher-band 9 is pushed into the band falling-out preventing
-20-
F705
portion 33. When the front end of the pusher-band 9 is pushed in the band falling-out
preventing portion 33, the front end of the pusher-band 9 climbs over the falling-out
preventing convex portion 33b of the band falling-out preventing portion 33 and butts
against the butting convex portion 33a of the band falling-out preventing portion 33.
5 [0105]
Figs. 16(a) and 16(b) are perspective views illustrating an example of the
process of mounting the pusher-band in the driver according to the first embodiment.
Figs. 17(a) and 17(b) are broken perspective views illustrating an example of the
process of mounting the pusher-band in the driver according to the first embodiment.
10 Next, a process of mounting the pusher-band 9 according to the first embodiment in the
driver 6 will be described.
[0106]
When the pusher-band 9 is mounted in the driver 6, if a direction indicated by
the arrow F2 in Fig. 11(a) is the front side of the driver 6, a position of the pusher-band
is 9 is adjusted with respect to, the band locking portion 62 of the driver 6 in a state where
the second locking hole portion 91 is deviated forward. In addition, as shown in Figs.
16(a) and 17(a), the band locking portion 62 of the driver 6 is inserted into the second
locking hole portion 91 of the pusher-band 9. In this state, the rear end side of the
pusher-band 9 is put on the band falling-out preventing portion 63 of the driver 6.
20 [0107]
Next, as shown in Figs. 16(b) and 17(b), the pusher-band 9 is pulled backward
while the pusher-band 9 is pressed toward the hole portion 64 of the driver 6. When
the pusher-band 9 is pulled backward, the second locking hole portion 91 is moved
backward with respect to the band locking portion 62 of the driver 6, and thus the
25 second locking hole portion 91 butts against a portion formed in a plane or a curved
surface of the base of the locking piece portion 62a of the band locking portion 62. In
addition, the edge of the second locking hole portion 91 is pressed by the locking piece
portion 62a of the band locking portion 62.
[0108]
30 In addition, the rear end of the pusher-band 9 climbs over the band falling-out
preventing portion 63, and the rear end of the pusher-band 9 butts against the band
falling-out preventing portion 63.
[0109]
-21-
F705

Next, a description will be made of an operation of the pusher retreat
mechanism according to the first embodiment in which the pusher-band 9, the pusher
3A, and the driver 6 on the upper handle 7 side are connected to each other as
s described above.
[0110]
In an operation of opening the upper handle 7 using the shaft 81 as a
supporting portion, the force is applied in the direction where the pusher 3A is pulled by
the pusher-band 9, and the pusher 3A pushes the first locking hole portion 90 of the
10 pusher-band 9 against the locking convex portion 32a of the band locking portion 32.
In addition, the driver 6 pushes the second locking hole portion 91 of the pusher-band 9
against the band locking portion 62.
[0111]
Thereby, in an operation of opening the upper handle 7, the pusher-band 9
is receives the force at the second locking hole portion 91 and is pulled by the band
locking portion 62 provided in the driver 6. The pusher 3A receives the force at the
locking convex portion 32a of the band locking portion 32 and is pulled by the first
locking hole portion 90 of the pusher-band 9.
[0112]
20 In an operation of closing the upper handle 7 using the shaft 81 as a supporting
point, when the pusher-spring 4 presses the pusher 3A, the pusher 3A applies the
force to the pusher-band 9 so as to be pulled, and thereby the pusher-band 9 receives
the force at the first locking hole portion 90 and is pulled by the locking convex portion
32a of the band locking portion 32 of the pusher 3A. The upper handle 7 receives the
25 force at the band locking portion 62 provided in the driver 6 and is pulled by the second
locking hole portion 91 of the pusher-band 9.
[0113]-
When the staples 10 are charged in the magazine 2A, if the pusher 3A
advances up to a position where the pressing portions 30a of the pusher 3A come into
30 contact with the staples 10, the front end of the staples 10 is pushed against the
magazine front wall 20c, and thus the pusher 3A stops moving.
[0114]
In a state where the pusher 3A stops moving, when the upper handle 7 is
-22-
F705
further closed, the force pressing the pusher 3A forward is applied by the pusher-band
9. When the force pressing the pusher 3A forward is applied by the pusher-band 9 in
a state where the pusher 3A stops moving, the front end of the pusher-band 9 is
pushed against the butting convex portion 33a of the band falling-out preventing portion
5 33.
[0115]
Thereby, the movement of the pusher-band 9 is regulated and is thus prevented
from releasing from the pusher 3A, and the pusher-band 9 is bent in an operation of
closing the upper handle 7. When the pusher-band 9 is bent and the upper handle 7
10 is further closed, the force pressing the pusher-band 9 forward is applied on the driver
6 side as well, and thus the rear end of the pusher-band 9 is pushed against the band
falling-out preventing portion 63 of the driver 6. Thereby, the movement of the
pusher-band 9 is regulated and thus release from the driver 6 is prevented.
[0116]
15
The pusher-band 9 is configured such that the length from the front end thereof
to the first locking hole portion 90 is substantially equivalent to the length between the
butting convex portion 33a of the band falling-out preventing portion 33 of the pusher
20 3A and the locking convex portion 32a of the band locking portion 32.
[0117]
Thereby, when the pusher 3A is mounted with the pusher-band 9, a state where
the front end of the pusher-band 9 butts against the butting convex portion 33a of the
band falling-out preventing portion 33 and the front end of the first locking hole portion
25 90 butts against the locking convex portion 32a of the band locking portion 32 is
maintained. In addition, the edge of the front end side of the first locking hole portion
90 is pressed by the falling-out preventing convex portion 32b of the band locking
portion 32.
[0118]
30 Therefore, in operations of opening and closing the upper handle 7 and an
operation of moving the pusher 3A, the pusher-band 9 is prevented from moving in a
direction where the pusher-band 9 releases from the pusher 3A, and thus the
pusher-band 9 is prevented from releasing from the pusher 3A. In addition, the front
-23-
F705
end of the pusher-band 9 is pressed by the falling-out preventing convex portion 33b of
the band falling-out preventing portion 33, and thereby the front end of the pusher-band
9 is prevented from releasing from the band falling-out preventing portion 33.
[0119]
s As described above, the mounting of the pusher-band 9 at the pusher 3A is
performed through an operation where the band locking portion 32 of the pusher 3A is
inserted into the first locking hole portion 90 of the pusher-band 9, the pusher-band 9 is
pulled as indicated by the arrow al in Fig. 15, and the front end of the pusher-band 9 is
pushed as indicated by the arrow a2.
10 [0120]
Thereby, the pusher-band 9 can be mounted in the pusher 3A through
operations of pushing and pulling the pusher-band 9 to and from one surface side with
respect to the pusher 3A which is one mounting portion of the pusher-band 9, and thus
a task is facilitated and automation of the task is possible.
is [0121]
The pusher-band 9 is configured such that the length from the rear end thereof
to the second locking hole portion 91 is substantially equivalent to the length between
the band locking portion 62 and the band falling-out preventing portion 63 of the driver
6, and, at least in a state where the rear end of the pusher-band 9 butts against the
20 band falling-out preventing portion 63, the locking piece portion 62a of the band locking
portion 62 does not fall out from the second locking hole portion 91.
[0122]
Thereby, when the pusher-band 9 is mounted in the driver 6, second locking
hole portion 91 of the pusher-band 9 butts against the step portions of the; band locking
25 portion 62, and the edge of the second locking hole portion 91 is pressed by the locking
piece portion 62a of the band locking portion 62. In addition, even if the pusher-band
9 moves forward and backward, the rear end of the pusher-band 9 butts against the
band falling-out preventing portion 63 in a state where the edge of the second locking
hole portion 91 is pressed by the locking piece portion 62a of the band locking portion
30 62.
[0123]
Therefore, in operations of opening and closing the upper handle 7 and an
operation of moving the pusher 3A, the pusher-band 9 is prevented from moving in a
-24-
F705
direction where the pusher-band 9 releases from the driver 6, and thus the
pusher-band 9 is prevented from releasing from the driver 6.
[0124]
As described above, the mounting of the pusher-band 9 in the driver 6 is
5 performed through an operation where the band locking portion 62 of the driver 6 is
inserted into the second locking hole portion 91 of the pusher-band 9, the pusher-band
9 is pulled as indicated by the arrow b1 in Fig. 17, and the rear end of the pusher-band
9 is pushed as indicated by the arrow b2.
[0125]
10 Thereby, the pusher-band 9 can be mounted in the driver 6 through operations
of pushing and pulling the pusher-band 9 to and from one surface side with respect to
the driver 6 which is the other mounting portion of the pusher-band 9, and thus a task is
facilitated and automation of the task is possible. In addition, although in the present
embodiment the pusher-band 9 is mounted using an equivalent mounting structure in
is the pusher 3A and the driver 6 on the upper handle 7 side, different mounting
structures may be used. In addition, although the band locking portion 62 and the
band falling-out preventing portion 63 have steps provided on the surface of the driver
6, a coplanar configuration is possible as long as a space into which the pusher-band 9
can be inserted between the driver 6 and the upper handle 7 can be secured.
20 [0126]

Next, a description will be made of configurations of a driver and a pusher-band
constituting a pusher retreat mechanism according to a modified example of the first
embodiment.
25 [0127]
Figs. 18(a) and 18(b) are diagrams illustrating a configuration of main parts of a
driver to which a pusher-band is locked according to a modified example. Fig. 18(a) is
a plan view illustrating a configuration of the main parts of the driver according to the
modified example of the first embodiment. Fig. 18(b) is a side cross-sectional view
30 illustrating a configuration of the main parts of the driver according to the modified
example of the first embodiment.
[0128]
The driver 6 includes a band locking portion 62 to which the pusher-band 9 is
-25-
F705
locked, and a band falling-out preventing portion 63 which prevents the pusher-band 9
locked to the band locking portion 62 from releasing from the driver 6.
[0129]
The band locking portion 62 includes a locking piece portion 62a which
5 protrudes toward the hole portion 64 penetrating through the driver 6 and is inserted
into a second locking hole portion 91 of the pusher-band 9, and a receptor 62b which
butts against the second locking hole portion 91 of the pusher-band 9 into which the
locking piece portion 62a is inserted.
[0130]
to The locking piece portion 62a is provided with a step relative to the driver 6 at
the height equivalent to the plate thickness of the driver 6, and protrudes from the
surface of the driver 6. The receptor 62b is constituted by one side of the hole portion
64 at the rear end side of the locking piece portion 62a protruding from the hole portion
64.
1s [0131]
The band falling-out preventing portion 63 is constituted by another side of the
hole portion 64, is provided with a step relative to the driver 6 at the height equivalent
to the plate thickness of the driver 6, and protrudes further forward than the band
locking portion 62 from the surface of the driver 6.
20 [0132]
When the pusher-band 9 is mounted in the driver 6 according to the modified
example, a position of the pusher-band 9 is adjusted with respect to the band locking
portion 62 of the driver 6 in a state where the second locking hole portion 91 is
deviated forward. In addition, the band locking portion 62 of the driver 6 is inserted
25 into the second locking hole portion 91 of the pusher-band 9. In this state, the rear
end side of the pusher-band 9 is put on the band falling-out preventing portion 63 of the
driver 6.
[0133]
Next, the pusher-band 9 is pulled backward while the pusher-band 9 is pressed
30 toward the hole portion 64 of the driver 6. When the pusher-band 9 is pulled
backward, the second locking hole portion 91 is moved backward with respect to the
band locking portion 62 of the driver 6, and thus the second locking hole portion 91
butts against the receptor 62b of the band locking portion 62. In addition, the edge of
-26-
F705
the second locking hole portion 91 is pressed by the locking piece portion 62a of the
band locking portion 62.
[0134]
In addition, the rear end of the pusher-band 9 climbs over the band falling-out
s preventing portion 63, and the rear end of the pusher-band 9 butts against the band
falling-out preventing portion 63.
[0135]
In an operation of opening the upper handle 7 using the shaft 81 as a
supporting portion, the second locking hole portion 91 of the pusher-band 9 is pushed
io against the receptor 62b of the band locking portion 62 on the driver 6 side.
[0136]
Thereby, in an operation of opening the upper handle 7, the pusher-band 9
receives the force around the center of the second locking hole portion 91 and is pulled
by the receptor 62b of the band locking portion 62 provided in the driver 6.
is [0137]
In an operation of closing the upper handle 7 using the shaft 81 as a supporting
point, as described above, when the pusher-spring 4 presses the pusher 3A, the
receptor 62b of the band locking portion 62 provided in the driver 6 receives the force
and is pulled by the second locking hole portion 91 of the pusher-band 9 on the upper
20 handle 7 side.
[0138]
When the staples 10 are charged in the magazine 2A, as described above, if
the pusher 3A advances up to a position where the pressing portions 30a of the pusher
3A come into contact with the staples 10, and, in a state where the pusher 3A stops
25 moving, when the upper handle 7 is further closed, the pusher-band 9 is bent.
[0139]
When the pusher-band 9 is bent and the upper handle 7 is further closed, the
force pressing the pusher-band 9 forward is applied on the driver 6 side as well, and
thus the rear end of the pusher-band 9 is pushed against the band falling-out
30 preventing portion 63 of the driver 6. Thereby, the movement of the pusher-band 9 is
regulated and thus releasing from the driver 6 is prevented.
[0140]
In the pusher retreat mechanism according to the modified example of the first
-27-
F705
embodiment, the force is received by the receptor 62b of the band locking portion 62
around the center of the driver 6, and thereby the second locking hole portion 91 of the
pusher-band 9 and the driver 6 come into contact with each other on the plane with the
relatively large area as compared with the first embodiment. Thereby, a load applied
s to the pusher-band 9 can be reduced.
[0141]
Figs. 19(a) and 19(b) show a pusher and a pusher-band according to the
modified example of the first embodiment. Fig. 19(a) is a plan view illustrating the
pusher and the pusher-band according to the modified example of the first embodiment.
10 Fig. 19(b) is a side cross-sectional view illustrating the pusher and the pusher-band
according to the modified example of the first embodiment.
[0142]
The pusher 3A according to the modified example includes a band locking
portion 32 to which the pusher-band 9 is locked, a band falling-out preventing portion
is 33 which prevents the pusher-band 9 locked to the band locking portion 32 from
releasing from the pusher 3A, and a guide convex portion 34 which guides mounting of
the pusher-band 9.
[0143]
The guide convex portion 34 protrudes toward the upper surface of the pusher
20 3A from the rear side of the band locking portion 32 and is inserted into a guide hole
portion 92 of the pusher-band 9. Positions of the guide convex portion 34 of the
pusher 3A and the guide hole portion 92 of the pusher-band 9 are adjusted with each
other, and thereby positions of the pusher 3A and the pusher-band 9 can be more
reliably determined in a case where assembling is performed using an automatic
25 machine or the like.
[0144]

Fig. 20 is an exploded perspective view illustrating an example of the stapler
according to a second embodiment. In a stapler 1B according to the second
30 embodiment, a spring-guide 50B constituting a guide member 5B has a piece holding
structure, and thereby a shape of a magazine 2B is simplified.
[0145]
The entire configuration of the stapler 1B according to the second embodiment
-28-
F705
is the same as that of the stapler 1A according to the first embodiment, that is, the
stapler 1 B includes a magazine 2B in which the staples 10 are charged, a pusher 3B
which presses the staples 10 charged in the magazine 2B, and a pusher-spring 4
which presses the pusher 3B.
5 [0146]
The stapler 1B includes a spring-guide 50B which guides the pusher-spring 4,
and a guide member 5B which is integrally formed with a pusher-guide 516 which
guides a movement of the pusher 3B and guides charging and extracting of the staples
10. The stapler 1B includes a driver 6 which separates and drives the staples 10
10 charged in the magazine 2B one by one, and an upper handle 7 provided with the
driver 6.
[0147]
The stapler 1B includes a clincher 80 which bends the legs 10b of the staple 10
penetrating through paper sheets, and a lower handle 8 where the magazine 2B and
is the upper handle 7 are rotatably supported by the shaft 81. The stapler 1B includes a
pusher-band 9 which delivers an opening operation of the upper handle 7 to the pusher
36 so as to retreat the pusher 3B.
[0148]
In the stapler 113, the pusher-spring 4 is mounted at the spring-guide 50B, and
20 the guide member 5B where the pusher 3B is mounted at the pusher-guide 51B is
mounted inside the magazine 2B, thereby forming a magazine assembly 11 B.
[0149]
The magazine assembly 11B is rotatably mounted in the lower handle 8 by the
shaft 81. The upper handle 7 is rotatably mounted in the lower handle 8 and the
25 magazine assembly 11 B by the shaft 81.
[0150]
in the stapler 1 B, the driver 6 is mounted in the upper handle 7, paper sheets P
are pinched between the magazine 2B and the clincher 80 of the lower handle 8 in an
operation of holding the upper handle 7 and the lower handle 8, and a staple 10 is
30 driven from the magazine 2B by the driver 6.
[0151]
The single staple 10 driven from the magazine 2B penetrates through the paper
sheets P pinched between the magazine 2B and the clincher 80 of the lower handle 8
-29-
F705
and is bent by the clincher 80, thereby binding the paper sheets P.
[0152]
In the stapler 1 B, the pusher 3B is connected to the driver 6 of the upper handle
7 side via the pusher-band 9, the pusher 3B is pulled and is retreated in an opening
5 operation of the upper handle 7 using the shaft 81 as a supporting point while the
pusher-band 9 compresses the pusher-spring 4, and thereby the staples 10 can be
charged in the magazine 2B of the magazine assembly 11 B.
[0153]
In the magazine assembly 11 B, the spring-guide 50B and the pusher-guides
10 51 B at both the left and right sides of the pusher-spring 4 are provided, and the staples
10 are prevented from being caught in the spring-guide 50B, the pusher-spring 4, or
the like in an operation of charging or extracting the staples 10 in or from the magazine
2B.
[0154]
1s In the stapler 1B, in an operation of closing the upper handle 7 using the shaft
81 as a supporting point, the pusher 3B is pressed by the restoring force of the
pusher-spring 4, and, in turn, the staples 10 charged in the magazine 2B are pressed.
[0155]

20 Figs. 21 to 24 show an example of the magazine assembly constituting the
stapler according to the second embodiment. The magazine 2B constituting the
magazine assembly 11 B according to the second embodiment will be described.
[0156]
Fig. 21 is a plan view illustrating an example of the magazine assembly
25 according to the second embodiment. Fig. 22 is a side view illustrating an example of
the magazine assembly according to the second embodiment. Fig. 23 is a side
cross-sectional view illustrating an example of the magazine assembly according to the
second embodiment. Fig. 24 is a front cross-sectional view illustrating an example of
the magazine assembly according to the second embodiment.
30 [0157]
The magazine 2B includes a magazine bottom 20a is formed in a
predetermined shape by being bent through shaping and bending processes of a
plate-shaped metal material such as a press process, and the staples 10 are charged
-30-
F705
in. The magazine 2B includes magazine side walls 20b which regulate a position in
the width direction along the needle crown 10a of the staple 10, and a magazine front
wall 20c which regulates a position in the front-back direction along the line width
direction of the staples 10.
5 [0158]
The magazine 2B includes staple covers 20d which regulates a position in a
vertical direction along the legs 10b of the staples 10. In the magazine 2B, an
opening portion 20e is provided with the dimension where a separate staple 10 passes
therethrough at the lower part of the magazine front wall 20c on the front end side of
to the magazine bottom 20a.
[0159]
The magazine 2B includes locking convex portions 21 which hold the upper
handle 7 at a closed position. The locking convex portions 21 protrude outwardly from
the facing magazine side walls 20b, and are locked to the locking convex portions 72 of
1s the upper handle 7.
[0160]
The magazine 2B includes locking concave portions 22 which hold the lower
handle 8 at the closed position and holds the guide member 5B. The locking concave
portions 22 are formed by providing openings at the facing magazine side walls 20b,
20 and are locked to locking convex portions 84b of the lower handle 8 and the guide
member 5B.
[0161]
The magazine 2B includes opening portions 23 which adjust a load applied to
the upper handle 7 in an operation of locking the upper handle 7 to the locking convex
25 portions 21. The opening portions 23 are formed by providing openings at the facing
magazine side walls 20b such that portions at which the locking convex portions 21 of
the magazine side walls 20b are provided are deformed by a desired load. In this
example, the locking concave portions 22 and the opening portions 23 are integrally
formed.
30 [0162]
The magazine 2B includes checking windows 24 through which whether or not
the staples 10 are charged and how many staples 10 are left can be checked. The
checking windows 24 are formed by providing long hole-shaped openings in this
-31-
F705
example at the front end sides of the facing magazine side walls 20b such that the
staples 10 charged in the magazine 2B are viewed.
[0163]
The magazine 2B includes hole portions 25 into which the shaft 81 is inserted.
5 The hole portions 25 are formed by providing circular through-holes conforming to the
diameter of the shaft 81 at the rear end side of the facing magazine side walls 20b.
[0164]
The magazine 2B includes support portion 27 which supports the guide
member 5B. The support portion 27 is constituted in a form of standing from the
10 magazine bottom 20a at the front end side of the magazine 2B.
[0165]
Figs. 25 to 28 show an example of the guide member according to the second
embodiment, and, next, the guide member 5B constituting the magazine assembly 11 B
according to the second embodiment will be , described.. Fig. 25 is a plan view
as illustrating an example of the guide member constituting the magazine assembly
according to the second embodiment. Fig. 26 is a side view illustrating an example of
the guide member constituting the magazine assembly according to the second
embodiment.
[0166]
20 Fig. 27 is a side cross-sectional view illustrating an example of the guide
member constituting the magazine assembly according to the second embodiment:
Fig. 28 is a front view illustrating an example of the guide member constituting the
magazine assembly according to the second embodiment.
[0167]
25 The guide member 5B is made of a resin material such as plastic, the
pusher-guides 51B are provided at both the left and right sides of the spring-guide 50B,
and, the spring-guide 50B and the pusher-guides 51B extend in the longitudinal
direction of the magazine 2B.
[0168]
30 In the guide member 513, a pair of pusher-guides 51B are arranged in parallel
with a gap slightly shorter than the inner width of the needle crown I Oa of the staple 10,
and the rear end sides of the spring-guide 50B and the pusher-guides 51B are
integrally connected to each other by a bearing portion 56 supported by the shaft 81.
-32-
F705
The bearing portion 56 is provided with hole portions 56a into which the shaft 81 is
inserted. In addition, the bearing portion 56 is provided with locking convex portions
56b which are inserted into the locking concave portions 22 of the magazine 2B and
protrude toward the side portions.
5 [0169]
In the guide member 5B, the front end sides of the pusher-guides 51B are
integrally connected to each other by a connection portion 57 with a shape connecting
the left and right pusher-guides 51B. The connection portion 57 has a shape locked
to the support portion 27 of the magazine 2B.
30 [0170]
The spring-guide 50B has the rear end side supported by the bearing portion 56
in a columnar shape, a prismatic shape , or the like into which the pusher-spring 4 can
be inserted and is constituted by a compression coil spring which receives the
compressive load and extends with the restoring force against the elastic deformation
is due to the compression.
[01711
The pusher-guides 51B include guide concave portions 58 in which the pusher
3B is mounted. The guide concave portions 58 are formed by providing grooves
which extend in the height direction at a part of the pusher-guides 51 B.
20 [0172]
The pusher 3B includes pressing portions 30a which press the staples 10, a
spring pressing portion 30b which is pressed against the pusher-spring 4, and a guide
grooves 35 which are guided by the pusher-guides 51 B of the guide member 5B.
[0173]
25 The pusher 3B includes a band locking portion 32 to which the pusher-band 9 is
locked, and a band falling-out preventing portion 33 which prevents the pusher-band 9
lockedJo the band locking portion 32 from releasing from the pusher 3B.
[0174]
The pressing portion 30a is formed in a shape which protrudes forward from
30 both the left and right sides on the front end side of the pusher 3B, and presses the two
legs 10b of the staple 10. The spring pressing portion 30b enters between a pair of
pusher-guides 51B inside of the pusher 3B covering the pusher-guides 5113, and is
formed by providing a hole portion inserted into the spring-guide 50B.
-33-
F705
[0175]
The guide grooves 35 are fitted into the pusher -guides 51 B inside the pusher
3B covering the pusher-guides 51 B , and is formed by providing depressed grooves in
the movement direction of the pusher 3B. The pusher 3B is provided with grooves
s (not shown ) conforming to the shape of the guide concave portions 58 provided in the
pusher-guides 51 B at the lower part of the guide grooves 35 , and is configured so as to
be inserted into the pusher-guides 51 B from the upper side at the position of the guide
concave portions 58.
[0176]
10 The band locking portion 32 includes a locking convex portion 32a, protruding
toward the upper surface of the pusher 3B, into which a first locking hole portion 90 of
the pusher-band 9 is inserted , and a falling-out preventing convex portion 32b which
protrudes forward from the upper end of the locking convex portion 32a and which
prevents the first locking hole portion 90 of the pusher-band . 9 from releasing from the
is locking convex portion 32a.
[0177]
The band falling-out preventing portion 33 includes a butting convex portion 33a
which protrudes toward the upper surface, of the pusher 3B further on the front side
than the band locking portion 32 and butts against the pusher-band 9, and a falling-out
20 preventing convex portion 33b which protrudes backward from the upper end of the
butting convex portion 33a and prevents the front end of the pusher-band 9 from
releasing from the butting convex portion 33a.
[0178]

An assembling process of the magazine assembly 11 B according to the second
embodiment will be described.
[0179]
First, the pusher-spring 4 is mounted at the spring-guide 50B of the guide
30 member 5B. Next, the pusher 3B is mounted at the pusher-guides 51B of the guide
member 5B. The pusher 3B bends the front end side of the spring-guide 50B
upwardly, the spring pressing portion 30b is inserted into the spring-guide 50B into
which the pusher-spring 4 is inserted, and the guide grooves 35 are inserted into the
-34-
F705
pusher-guides 51B from the upper side so as to be aligned with the guide concave
portions 58 of the pusher-guides 51 B.
[0180]
Thereby, the pusher 3B is mounted so as to be movable along the spring-guide
s 50B and the pusher-guides 51 B. The front end side of the pusher-spring 4 in the axial
direction of the coil comes into contact with the pusher 3B.
[0181]
The guide member 5B mounted with the pusher 3B and the pusher-spring 4 is
mounted in the magazine 2B. First, the connection portion 57 on the front end side of
10 the guide member 5B is locked to the support portion 27 of the magazine 2B. Next,
the bearing portion 56 on the rear side of the guide member 5B is inserted between the
magazine side walls 20b of the magazine 2B, and the locking convex portions 56b of
the bearing portion 56 is inserted into the locking concave portions 22 of the magazine
2B so as to be locked thereto.
15 [0182]
Thereby, the connection portion 57 is supported by the support portion 27 of the
magazine 2B at the front end side of the guide member 513, and the locking convex
portions 56b is supported by the locking concave portions 22 of the magazine 2B at the
rear end side thereof. In the magazine assembly 11B according to the second
20 embodiment as well, the pusher-spring 4 may be simply inserted into the spring-guide
50B in a process of mounting the pusher-spring 4 in the guide member 5B, and it is
possible to reduce time for the assembling as compared with the configuration of using
the tension coil spring.
[0183]
25
In the magazine assembly 11B assembled as described above, the shaft hole
portions 84a of the lower handle 8 are aligned with the hole portions 25 of the
magazine 2B, and the shaft 81 is inserted into the holes and is calked.
30 [0184]
When the shaft 81 is inserted into the hole portions 25 of the magazine 2B, the
shaft 81 is inserted into the hole portions 56a of the bearing portion 56 of the guide
member 5B. Thereby, the rear end side of the guide member 5B is fixed to the
-35-
F705
magazine 2B.
[0185]
In the magazine assembly 11B where the guide member 5B is mounted in the
magazine 213, the spring-guide 50B is aligned in an approximate central line shape of
s the magazine 213, and the pusher-guides 51B are integrally disposed with the
spring-guide 50B at the spring-guide 50B and both the left and right sides of the
pusher-spring 4.
[0186]
The height of the pusher-guides 51B is substantially equivalent to the
io spring-guide 50B and is smaller than the length of the legs 1Ob of the staples 10. A
space larger than the line width of the staple 10 is formed between the pusher-guides
51B and the magazine side walls 20b. A space which is equivalent to or larger than
the line width of the staple 10 is formed between the front ends of the pusher-guides
51 B and the magazine front wall 20c.
is [0187]
In an operation of opening the upper handle 7 using the shaft 81 as a
supporting point, the pusher-spring 4 is compressed and the pusher 3B is pulled to be
retreated by the pusher-band 9, and then a space in which the staples 10 can be
charged is formed between the pusher 3B and the magazine front wall 20c.
20 [0188]
In the configuration of using a compression coil spring as the pusher-spring 4;
since the pusher-spring 4 is compressed by retreating the pusher 313, the pusher-spring
4 is not exposed to a space in which the staples 10 is charged inside the magazine 2B.
The spring-guide 50B exposed to the space in which the staples 10 are charged
25 inside the magazine 2B is provided with the pusher-guides 51 B at both sides.
[0189]
Thereby, in an operation of charging or extracting the staples 10 in or from the
magazine 2B, the legs 10b of the staples 10 are guided in a space between the
pusher-guides 51B and the magazine side walls 20b, and thus the staples 10 are
30 prevented from being caught in the spring-guide 5013, the pusher-spring 4, or the like.
[0190]
In an operation of opening the upper handle 7 using the shaft 81 as a
supporting point, when the pusher 3B is pulled by the pusher-band 9, not only the force
-36-
F705
moving the pusher 3B along the pusher-guides 51 B but also the force in a direction of
raising the pusher 3B from the pusher-guides 51 B are applied to the pusher 3B.
[0191]
Since the guide grooves 35 are fitted into the pusher-guides 51 B, the pusher 3B
5 is prevented from releasing from the pusher-guides 51 B even if the force in the
direction of raising the pusher 3B from the pusher-guides 51 B.
[0192]
The front end sides of the pusher-guides 51B are fixed to the magazine 2B
since the connection portion 57 is supported by the support portion 27 of the magazine
10 2B. The shaft 81 is inserted into the bearing portion 56 of the guide member 513, and
thereby the rear end side thereof is fixed to the magazine 2B.
[0193]
Thereby, even if the force in the direction of raising the pusher 3B from the
pusher-guides 51 B is applied, the guide member 5B having the pusher-guides 51 B is
is prevented from releasing from the magazine 213, and the pusher-guides 51B are
prevented from being significantly deformed.
[0194]
In accordance with the above embodiments and modified examples, a stapler
1A, 1B may include: a magazine 2A, 213; a pusher 3A, 3B for pressing staples 10 in the
20 magazine 2A, 2B; a pusher-spring 4 structured by a compression coil spring that
receives a compressive load and adapted to presses the pusher 3A, 313; a guide
member 5A, 5B that is formed by integrally molding a spring-guide 50A, 50B for
suppressing a bending of the pusher-spring due to a compression thereof and a
pusher-guide 51 A, 51B for guiding a movement of the pusher 3A, 3B and also guiding
25 a charging/extracting of the staples 10, and that is mounted inside the magazine 2A,
213; a driver 6 for separating the staples 10 in the magazine one by one and driving the
separated staple 10; an upper handle 7 to which the driver 6 is fixed; and a lower
handle 8 to which a clincher for bending legs 10b of a staple 10 penetrating through
paper sheets is provided and on which the magazine 2A, 2B and the upper handle 7
30 are rotatably supported.
[0195]
According to this structure, an upper surface of the magazine is open by
opening the upper handle. When the pusher is retreated, the pusher-guide is
-37-
F705
provided in a space inside the magazine in which staples are charged, and thus
charging and extracting of the staples are guided.
[0196]
According to this structure, since a compression coil spring is used as the
s pusher-spring pressing the pusher, a component price can be suppressed as
compared with a tension coil spring.
[0197]
In addition, since the guide member guiding charging and extracting of staples
is provided in the magazine, the staples are prevented from rolling in the magazine,
10 and thus it is possible to easily and reliably perform charging and extracting of the
staples.
[0198]
In addition, since the spring-guide guiding the pusher-spring and the
pusher-guide guiding the pusher and the staples are integrally formed and are provided,
15 a function of guiding the staples is added without increasing the number of components
as compared with staplers in the related art, and thus it is possible to provide a stapler
having the function at a low price.
[0199]
Moreover, In accordance with the above embodiments and modified examples,
20 a stapler 1A, 1 B may include: a magazine 2A, 213; a pusher 3A, 3B for pressing staples
10 in the magazine 2A, 213; a pusher-spring 4 for urging the pusher 3A, 313; a driver 6
for separating the staples 10 in the magazine 2A, 2B one by one and for driving the
separated staple 10; an upper handle 7 including the driver 6; a lower handle 8 to
which a clincher for bending legs 10b of a staple 10 penetrating through paper sheets
25 is provided and on which the magazine 2A, 2B and the upper handle 7 are rotatably
supported; and a pusher-band 9 for retreating the pusher 3A, 3B by transmitting an
operation of opening the upper handle 7 to the pusher 3A, 3B. At least one of the
pusher 3A, 3B and the upper handle 7 may include: a band locking portion 32, 62 to
which a locking hole portion 90, 91 provided on an end portion side of the pusher-band
30 9 is engaged so as to lock the pusher-band 9; and a band falling-off preventing portion
33, 63 against which an end portion of the pusher-band 9 locked to the band locking
portion 32, 62 butts so as to prevent the pusher-band 9 from releasing from the band
locking portion 32, 62.
-38-
F705
[0200]
According to this structure, mounting of the pusher-band on either the pusher or
the upper handle or both the pusher and the upper handle is performed through an
operation in which the band locking portion is inserted into the locking hole portion of
s the pusher-band so as to pull the pusher-band, and then the end portion of the
pusher-band is pushed into the band falling-out preventing portion provided in the
pusher.
[02011
According to this structure, the pusher-band can be mounted in the pusher
10 through operations of pushing and pulling the pusher-band to and from one surface
side with respect to either the pusher or the upper hand or both the pusher and the
upper handle which are mounting portions of the pusher-band, and thus a task is
facilitated and automation of the task is possible.
[0202]
1s Therefore, a separate component for mounting the pusher-band is not
necessary, costs occurring in a process of mounting the pusher-band can be reduced,
and thus it is possible to provide a stapler having a function of interlocking opening and
closing of the upper handle with retreat of the pusher, at a low price. In addition, the
present invention is not limited to mounting of the pusher-band of the stapler, and a
20 configuration of easily connecting a sheet-shaped band to a target can be realized at a
low price with a configuration of the locking hole portion, the band locking portion, and
the band falling-out preventing portion.
F705
What is claimed is:
1. A stapler (IA, 1 B) comprising:
a magazine (2A, 2B);
a pusher (3A, 3B) for pressing staples (10) in the magazine (2A, 2B);
5 a pusher-spring (4) structured by a compression coil spring that receives a
compressive load and adapted to presses the pusher (3A, 3B);
a guide member (5A, 5B) that is formed by integrally molding a spring-guide
(50A, 50B) for suppressing a bending of the pusher-spring due to a compression
thereof and a pusher-guide (51A, 51 B) for guiding a movement of the pusher (3A, 3B)
10 and also guiding a charging/extracting of the staples (10), and that is mounted inside
the magazine (2A, 2B);
a driver (6) for separating the staples (10) in the magazine one by one and
driving the separated staple (10);
an upper handle (7) to which the driver (6) is fixed; and
15 a lower handle (8) to which a clincher for bending legs (10b) of a staple (10)
penetrating through paper sheets is provided and on which the magazine (2A, 2B) and
the upper handle (7) are rotatably supported.
2. The stapler (1A, 1B) according to claim 1, wherein the pusher-spring (4) is
20 inserted into the spring-guide (50A, 50B), and
wherein the pusher-guide (51 A, 51B) is disposed at both left and right sides of
the spring-guide (50A, 50B), and a space into which the legs (10b) of the staples (10)
are inserted is formed between the pusher-guide (51 A, 51B) and a magazine side wall
(20b) of the magazine (2A, 2B).
25
3. The stapler (1A) according to claim 1 or 2, wherein a first shaft portion (53a) is
provided on a front end side of the spring-guide (50A) and a second shaft portion (53b)
is provided on a rear end side of the spring-guide (50A),
wherein a first support portion (26a) into which the first shaft portion (53a) is
30 inserted is provided on a front end side of the magazine (2A), and a second support
portion (26b) into which the second shaft portion (53b) is inserted is provided on a rear
end side of the magazine (2A), and
wherein the guide member (5A) is supported on the magazine (2A) at a front
-40-
F705
end side by the first support portion (26a) and at a rear end side by the second support
portion (26b).
4. The stapler (1 B) according to claim I or 2, wherein the guide member (5B) is
s supported on the magazine (213) by a shaft (81) for supporting the magazine (2B)
rotabtably about the upper handle (7) and the lower handle (8).
5. The stapler (1A, 1B) according to any one of claims 1 to 4, wherein the
pusher-guide (51A, 51B) guides a movement of the pusher (3A, 313) in a direction
so where the pusher (3A, 3B) is pressed by the pusher-spring (4), and regulates a vertical
movement of the pusher (3A, 3B).
6. The stapler (1A, 113) according to any one of claims 1 to 5, wherein at least a
space through which a separated staple (10) passes is provided between the
is pusher-guide (51A, 51B) and a magazine front wall (20c) of the magazine (2A, 2B).
7. The stapler (1A, 1B) according to any one of claims 1 to 6, wherein a
pusher-band (9) for retreating the pusher (3A, 3B) by transmitting an operation of
opening the upper handle (7) to the pusher (3A, 313) is provided.