Technical field
[0001] The present invention is, for example, either deformable hose or tube having flexibility formed of a soft material such as synthetic resin or rubber, or a tube, such as a non-deformable pipe about the pipe joint used for piping connection .
Background technique
[0002] Conventionally, as this kind of pipe fitting, comprising a nipple can be inserted a hose, and an upper shell and a lower shell semi-cylindrical can be fitted to the nipple, an elastic deformation ring for tightening the hose, and an upper shell by tightening the upper shell and a lower shell by inserting a bolt into the bolt hole of the end portion of the lower shell, uniformly bite into the outer circumference of the hose is deformed the elastic deformation ring, there is a hose connector to achieve leakage prevention (e.g. , see Patent Document 1).
In detail, the clamping starting upper shell and a lower shell by bolts, the upper shell and lower shell are spaced apart in the radial direction. Top shell and bottom shell gradually approaches moved radially so as to sandwich the elastic deformation ring by tightening the bolt, so as to diameter deform the elastic deformation ring along with the approaching movement of these upper shell and the lower shell It is configured.
CITATION
Patent literature
[0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2009-85275

Summary of the invention
Problems that the Invention is to Solve
[0004] By the way, by the tightening of the bolts when the upper shell and a lower shell is forced to reduce the diameter deformation of the elastic body deformation ring close move, at any position in the circumferential direction of the elastic body deformation ring, minutes only was reduced in diameter deformation meat more than the site occurs. This meat-odd sites, gradually increases in the radial direction and the axial direction along with the reduced diameter change shape of the elastic deformation ring.
However乍Ra, in such a conventional pipe joint, since just before exiting at the start tightening by bolt ends of the upper shell and lower shell are opened apart, with the reduced diameter change shape of the elastic deformation ring meat over part generated on the enters bulges toward the opening between the ends of the upper shell and the lower shell, thus bites therebetween.
Once caught the meat over the site of the elastic deformation ring, it can not be approaching move to it more than the upper shell and a lower shell by tightening the bolts. Therefore, bolts shut up the upper shell and a lower shell until a preset approaching end position (fully tighten) it can not be. In this situation, the clamping of the elastic deformation ring for hose, generally becomes uneven, especially loose meat over the site, there is a problem that leakage accident of the fluid tends to occur pull-out strength of the hose is reduced It was.
Further, when the elastic deformation ring in order to increase the clamping force of the hose be thicker, with the forced condensation diameter change shaped elastic deformation ring, bulged toward the opening between the ends of the upper shell and the lower shell the volume of meat over sites deformation increases. Thereby, the amount bite meat over part also increases, there is a problem that the pull-out strength of the hose is lowered more.
[0005] The present invention has an object to cope with such a problem, a plurality of divided holders to prevent the meat over part of the elastic sleeve is pinched between the peripheral end portions of the plurality of divided holders it is shut up in the fastening member, and it is an object like.
Means for Solving the Problems
[0006] The present invention in order to achieve the above object, provided so as to surround the nipple provided along the insertion space of the tube, the outer periphery of the insertion space of the tubular body formed along the outer peripheral surface of the nipple a deformable elastic sleeve radially to be, with the plurality of split holder which is provided to be separable outer surface of the elastic sleeve on the outside of the elastic sleeve covering the circumferential direction and the radial direction, it is provided over the plurality of divided holders is in the over the inner surface of the peripheral end portions of the plurality of divided holders said that a fastening member a plurality of split holder between the elastic sleeve to approach movement in the radial direction so as to diameter variations, adjacent in the circumferential direction comprising a stopper member provided to be opposed to said outer surface in a radial direction of the elastic sleeve, and the stopper member, the elastic sleeve has been reduced in diameter deformed along with the approaching movement of the plurality of divided holder by the fastening member characterized in that the meat over the site in a radial direction with a contact with the guide surface.
Effect of the invention
[0007] The present invention having the aforementioned features, by approaching moving a plurality of divided holders radially tightening member, the resilient sleeve wall over part occurs in diameter deformed. Meat over part with the reduced diameter change shape subsequent elastic sleeve, attempting to bulge toward between the peripheral end portions of the plurality of divided holders adjacent in the circumferential direction, the guide surfaces of the stopper member from the outside of the meat over the site There by abutting the radial direction, to suppress the bulging of the meat over the site, the meat over site not enter between the peripheral end portions of the plurality of split holder is guided in the circumferential direction.
Accordingly, it is possible to shut up by members fastening the plurality of divided holders to prevent the meat over part of the elastic sleeve is pinched between the peripheral end portions of the plurality of divided holders.
As a result, apart ends of the upper shell and a lower shell immediately before exiting at the start tightening by bolt, compared with the conventional one will bite the meat over part that occurred with the reduced diameter change shape of the elastic deformation ring , tightening of the elastic sleeve to the tube body, can be loosely overall uniformly not in the flesh over the site, improve the pull-out strength of the tubular body, excellent safety can reliably prevent the leakage accident of fluid.
Furthermore, regardless of the thickness of the resilient sleeve, since it becomes possible to prevent the biting of the meat over site for between peripheral edge portions of the plurality of divided holders, it can be tightened more strongly tube with an elastic sleeve thick to become. Thus, to further improve the pull-out strength of the tube can be reliably prevented over a leakage accident of the fluid-term.
Brief description of the drawings
[0008] [1] is an explanatory diagram showing the overall configuration of the pipe joint according to an embodiment of the present invention, the (a) is tightened before the side view, (b) in FIG. 1 (a) (1B) - (1B) it is a live up longitudinal front view of the line.
[Figure 2] is an explanatory view showing a state after the fastening, (2B) of (a) is a side view, (b) in FIG. 2 (a) - a (2B) live up longitudinal sectional front view in line.
[3] is a perspective view showing a method of connecting the tube by the tube joint according to an embodiment of the present invention, an exploded perspective view of the front connection (a), an external perspective of the start state assembling (b) Figure, an external perspective view before clamping is (c), is an external perspective view after tightening (d).
[Figure 4] is an explanatory view showing a modified example of the joint main body, (a) is an exploded perspective view before connection, external perspective view of the start state assembling (b), perspective before tightening (c) Figure is an external perspective view after tightening (d).
[5] is an explanatory view showing a modified example of the elastic sleeve, (a) is an exploded perspective view before connection, external perspective view of the start state assembling (b), perspective before tightening (c) Figure is an external perspective view after tightening (d).

DESCRIPTION OF THE INVENTION
[0009] Hereinafter, it will be described in detail with reference to embodiments of the present invention with reference to the drawings.
Pipe joint A according to an embodiment of the present invention, as shown in FIGS. 1 to 5, insert the connecting end Ba of the tube B between the nipple 1 and the elastic sleeve 2 of the joint body 10, the resilient sleeve 2 covered with a plurality of divided holder 3 on the outside is a connector for connecting to a cylindrical shape close move together with member 4 fastening a plurality of divided holder 3 between the radial direction.
By approaching move a plurality of divided holder 3 in the clamping member 4, the elastic sleeve 2 reduced in diameter deformation, all the peripheral to the outer surface B1 of the connection end Ba of the inner surface 2a of the elastic sleeve 2 the tube B over and to substantially uniformly contact. Along with this, is detachably pipe connecting the inner surface B2 of the tube B in close contact with the outer peripheral surface 1a of the nipple 1. Thereby, diameter even can be easily connected tubular body B of the relatively large large diameter, and assembly and disassembly can be easily cleaned.
In detail, the pipe joint A according to an embodiment of the present invention, a nipple 1 provided along the insertion space S of the tube Bs, insertion space S of the tube is formed along the outer peripheral surface 1a of the nipple 1 Bs the elastic sleeve 2 provided so as to surround the outer periphery, a plurality of split holder 3 which is provided to be separable outer surface 2b of the elastic sleeve 2 covering the circumferential direction and the radial direction, a plurality of over a plurality of split holder 3 a clamping member 4 which is provided with a split holder 3 together so as to close moving together in the radial direction, a stopper member 5 provided over the inner surface 3b of the circumferential end portion 3a of the plurality of divided holder 3 adjacent in the circumferential direction, a has as main components.
It should be noted that, as shown in FIGS. 1 to 5, the insertion direction N of the tube B with respect to the insertion space S "or less, the tube insertion direction N" is called, in the reverse direction U of tube insertion direction N "or less, the tube exit that direction U ".
[0010] Joint body 10, for example a rigid material such as rust difficult stainless steel, metal or hard synthetic resin such as brass, or the wall thickness is formed in a thick substantially cylindrical shape, or pressing or formed by other for the molding that. Joint body 10 includes a cylindrical nipple 1 has a connection 11 for connection to another tube (not shown) and the pipe connecting port of another device (not shown).
Nipple 1 is formed on the distal end side of the joint body 10, the connecting portion 11 is formed on the base end side of the joint body 10.
[0011] The outer diameter of the nipple 1 is greater than or or slightly smaller slightly than the substantially the same or greater and the inner diameter of which will be described later the tube B.
The outer peripheral surface 1a of the nipple 1, the predetermined position in the axial direction, the tube insertion space unevenness for the tube retaining arranged opposite to the inner surface 2a in the radial direction of the elastic sleeve 2 to be described later across the S and B and part 1 b, it is preferable to have a, and means 1c retained for immovable position regulation of a split holder 3 to be described later in the axial direction.
Specific examples of the nipple 1, as shown in FIG. 3 (a) ~ (d) , as uneven portion 1b for retained tube only the tip portion of the outer peripheral surface 1a (end of the tube exit direction U), continuously plurality of annular recess and the annular convex portion alternately in the axial direction are uneven formation. Between the base end side of the outer peripheral surface 1a (the back side of the pipe insertion direction N) and the connecting portion 11, as retaining means 1c divided holder 3, protrudes an engaging portion 1c1 which continuous annular circumferential direction doing.
Further, although not illustrated as another example, over substantially the entire length of the outer peripheral surface 1a of the nipple 1, as irregular portion 1b for preventing escape tube, formed in a bamboo shoot shaped annular recess and the annular convex portion in the axial direction are continuous alternately or, it is also possible to change or providing the annular seal member in pressure contact to the inner surface B2 and the radially of the tube B to the outer peripheral surface 1a of the nipple 1. Furthermore, the retaining means 1c divided holder 3, the engaging portion 1c1 which are divided in the circumferential direction or protrude, continuous in the circumferential direction or divided also change or form the engaging portion 1c1 of the concave possible it is.
[0012] Elastic sleeve 2, for example at and elastically deformable material excellent in heat resistance, such as rubber or soft synthetic resin, is formed to at least radially elastically deformable generally cylindrical, the outer peripheral surface 1a of the nipple 1 It is assembled so as to face in the radial direction across the insertion space S of the tube Bs. During the elastic sleeve 2 assembling thereof, abutting the inner surface 2a facing to the outer surface B1 and the radial direction of the connection end portion Ba of the mounted on the outside of the outer peripheral surface 1a of the nipple 1 tube Bs, the plurality of split holder for later has opposed to the outer surface 2b, and to 3 of the inner surface 3b and the radial direction.
The inner surface 2a of the elastic sleeve 2, the inner diameter of the enlarged diameter at the time is, is slightly larger outside diameter substantially the same or it than be described later the tube B, inner diameter in contraction径時is, the outside diameter of the tube B It is set to be smaller than.
Further, the outer surface 2b of the elastic sleeve 2, an outer diameter at the time of enlarged diameter is set to be larger than the inner diameter at approaching movement completion of a plurality of split holder 3 described later. In other words, close movement of the plurality of divided holder 3 is completed, at the time became more approaching movement impossible, is set to be larger than the inner diameter of the inner surface 3b of the plurality of split holder 3.
Further, the elastic sleeve 2, by forming the slits 2c for causing smoothly elastically deformed radially at predetermined intervals in a plurality respectively circumferentially, inside diameter sufficient difference in the time of enlarged diameter variations and during contraction diameter change shape it is preferred that the outer diameter difference is configured to generate the.
[0013] Split holder 3, for example, a cylindrical body formed of a rigid material such as metal or hard synthetic resin such as rust difficult stainless steel or brass, it is formed in a shape divided into a plurality in the circumferential direction.
The plurality of split holder 3, as shown in FIG. 3 (a) (b), assembled to surround the outer surface 2b of the elastic sleeve 2 from the outside. Has a this assembly a plurality of circumferential end portions 3a adjacent each circumferentially state, a plurality of inner surface 3b facing each to the outer surface 2b in the radial direction of the elastic sleeve 2, a.
Peripheral end portion 3a of the plurality of divided holder 3 is formed so as to protrude into at least one pair each radially outwardly with respect to each divided holder 3 has an end face 3c that is substantially parallel to the opposing in the circumferential direction.
Further, tightening will be described later over the peripheral end portion 3a of the plurality of divided holder 3 adjacent in the circumferential direction member 4 is provided. As shown in FIG. 3 (c), by operating the fastening member 4, close moving together the plurality of split holder 3 with each other in the radial direction, and a sleeve 2 so as to diameter variations. Inner surface 3b of the plurality of divided holder 3, at the time of completion of the approaching movement of the plurality of divided holder 3 by the fastening member 4, formed in an arcuate surface substantially becomes true circle inner surface 3b of the plurality of split holder 3 is continuously It is. On the inner surface 3b of each divided holder 3, it is preferable to provide a step portion 3d for positioning the elastic sleeve 2 in the axial direction.
Further, the all of one or split holder 3 one of a plurality of split holder 3 to form a locking portion 3e of immovable engaging the retaining means 1c and the axial direction of the nipple 1.
[0014] Specific examples of the plurality of divided holder 3, as shown in FIGS. 1 to 5, a cylindrical body is divided into two parts in the circumferential direction, and the first divided holder 31 formed in a semi-cylindrical symmetrical first It uses a two-piece holder 32. The first divided holder 31 and the second divided holder 32, the peripheral end portions 3a each have in pairs.
The base end portion of the first divided holder 31 and the second divided holder 32 (the rear side end of the tube insertion direction N), as the locking portion 3e, a hook for engaging the engaging portion 1c1 and the axial direction of the nipple 1 the protruding respectively.
Further, although not illustrated as another example, or the cylinder circumferential thirds or four divided to or by dividing it above to to approximate movement in the clamping member 4 will be described later, respectively to a plurality of radial, first it is also possible to change or to form a locking portion 3e on one of the base end portion of one split holder 31 and the second divided holder 32.
[0015] The tightening member 4, and the head 4a with a tool engagement portion 4a1 to engage a tool (not shown), such as a wrench or spanner, a shaft portion 4b continuous with the head 4a, formed at the distal end of the shaft portion 4b it is preferable to use a fastener such as a bolt having a threaded portion 4c to be. In the illustrated example, the tool engagement portion 4a1 is engaging recess, such as a hexagonal hole.
When using threaded fasteners as fastening member 4, a through hole 3f that is opened in one of the peripheral of a plurality adjacent in the direction dividing the holder 3 of the peripheral end portion 3a, in the screw hole 3g that is opened in the other It is inserted over. Engaged with a tool such as a wrench or spanner in the tool engagement portion 4a1 of the screw parts in the insertion state rotate operation.
Thereby, the first divided holder 31 and the second divided holder 32 of the pair is close move together in the radial direction, and the sleeve 2 is reduced in diameter deformed. In addition, since it is possible to tighten in the relatively small tool such as a wrench or spanner, it can also be easily connected to the pipe joint A for large diameter to connect the tube B of large diameter, and assembly and disassembly is suitable can be easily cleaned.
Although not shown other examples, the fastening member 4, or using the bolt tool engagement portion 4a1 formed the outer surface of the head 4a polygon such as hexagon, change or using fastening components other than threaded fasteners it is also possible to.
[0016] The stopper member 5, for example made of a material such as polyacetal resin or other sliding property and excellent heat resistance synthetic resin surface is the component for suppressing partial bulging deformation of the elastic sleeve 2 . The stopper member 5, as shown in FIGS. 1-5, are disposed a plurality respectively between a plurality of divided holder 3 of the circumferential end portion 3a adjacent the circumferential direction. The stopper member 5 has a fastening with the approaching movement of the plurality of divided holder 3 by the member 4 opposed to the reduced diameter deformation meat over part 2c in the radial direction of the elastic sleeve 2 abuts the guide surface 5a.
Guide surfaces 5a is a surface formed so as to be continuous with the inner surface (arcuate surface) 3b of the plurality of divided holder 3 on the inside of the stopper member 5. FIG 1 (a) (b) and as shown in FIG. 3 (c), is formed so as to be wider than the interval of the end face 3c of each other circumferential end portion 3a adjacent to the circumferential direction at the start tightening by the tightening member 4 ing. That is, in the beginning fastening by the fastening member 4 as shown in FIG. 1 (a) (b) and FIG. 3 (c), the a circumferential opposite ends of the guide surfaces 5a, the inner surfaces of the plurality of divided holder 3 (arcuate surface) 3b it is set so that there is no gap between the circumferential edge.
[0017] Specific examples of the stopper member 5, as shown in FIGS. 1-5, a plurality of split holder 3 (the first divided holder 31, the second divided holder 32) over the inner surface 3b of the circumferential end portion 3a , it is preferable to use a spacer 51 which is provided immovably in at least the circumferential direction. It is preferred for the inside of the spacer 51 for forming the arc-shaped guide surface 5a.
The spacer 51 preferably has a positioning means 5b of the spacer 51 for a plurality of split holder 3, the fastening member penetrating portion 5c which (threaded part) 4 passes, the.
The penetration portion 5c, a through hole and as shown in FIGS. 1-5, such as notches, such as "U-shaped" is used otherwise.
[0018] On the other hand, tube B, for example a soft material such as soft synthetic resin or a silicone rubber or other rubber such as vinyl chloride, it is preferred that in such elastically deformable shaped as for example a hose or tube with a flexible . In addition, the inner surface B1 and the outer surface B2 preferably has a flat in at least connecting end Ba of the tube B.
Specific examples of the tube B, and the illustrated example uses a hose with a single-layer structure.
Further, not illustrated as another example, but instead of the tubular body of the single layer structure as a tube B, and the like may be used a tube having a multilayer structure. Examples of various types of tube Bs, as an intermediate layer between the transparent or opaque outer layer and inner layer laminated to a plurality of or single book synthetic resin blade (reinforcing thread) is embedded in a spiral shape hose (blade hose) and, spiral reinforced hose linear reinforcing material, such as a belt-like reinforcement and a circular cross-section, such as synthetic resin or metal rectangular cross-section as an intermediate layer and integrated with spirally wound (Four run hose) and, such spiral reinforcement hose buried metal wire rod or a hard synthetic resin wire rod spirally and the like.
[0019] According to the pipe joint A according to the embodiment of the present invention as described above, first, as shown in FIG. 3 (a) (b), after inserting the connecting end portion Ba of the tube B to the elastic sleeve 2, along the outer peripheral surface 1a of the nipple 11 inserted into the tube insertion direction N. The outside, a plurality of split holder 3 so as to cover an outer surface 2b of the elastic sleeve 2 in the circumferential direction (the first divided holder 31, the second divided holder 32), assembling the stopper member 5.
Following this, as shown in FIG. 1 (a) (b) and FIG. 3 (c), the fastening member by causing (threaded part) 4 in close move together a plurality of divided holder 3 in the radial direction, elastic sleeve 2 meat over site 2c is generated reduced in diameter deformation.
This meat over the site. 2c, gradually increases in the radial direction and the axial direction with the subsequent shrinkage diameter change shape of the elastic sleeve 2, meat over the site 2c there are no more place to go is, of multiple adjacent to the circumferential direction split holder 3 we try to bulge toward between the peripheral end portion 3a. However, the guide surface 5a of the stopper member 5 from the outside of the meat over part 2c of the elastic sleeve 2 abuts the radial direction, to suppress the bulging of the meat over part 2c, the peripheral end portions of the plurality of divided holders 3 3a meat over site 2c can not enter between, it is induced in the circumferential direction.
Thereby, as shown in FIG. 2 (a) (b) and FIG. 3 (d), the that the meat over part 2c of the elastic sleeve 2 between a plurality of divided holder 3 of the peripheral end portion 3a is caught prevention, it is possible to shut up in the member 4 tightening a plurality of divided holder 3 (fully tighten).
Thus, tightening of the elastic sleeve 2 with respect to the tube B is, can generally uniformly not loose in the meat more than the site 2c, the pull-out strength is improved of the tube B to the tube exit direction U to the nipple 1 of the joint body 10 , excellent safety can reliably prevent the leakage accident of fluid.
Furthermore, regardless of the thickness of the elastic sleeve 2, it becomes possible to prevent the biting of the meat over part 2c with respect to between a plurality of split holder 3 of the peripheral end portion 3a, an elastic sleeve 2 thick a tube B it is possible to tighten stronger. As a result, missing to strength the further improvement of the tube B, it can be reliably prevented over the leak accident of fluid in the long term.
[0020] In particular, the stopper member 5, a spacer 51 which is provided immovably over the inner surface 3b of the plurality of split holder 3 of the peripheral end portion 3a in the circumferential direction, having an arcuate guide surface 5a to the inside of the spacer 51 it is preferred.
In this case, tightening with the approaching movement of the plurality of divided holder 3 by member 4, the elastic sleeve 2 reduced in diameter deformed toward between the peripheral end portions 3a each other of the plurality of split holder 3 adjacent in the circumferential direction , even if the bulging deformation meat over part 2c of the elastic sleeve 2 is radially outwardly, then the meat over part 2c abuts against the arcuate guide surface 5a of the spacer 51 serving as a stopper member 5 smoothly in the circumferential direction It is induced to slide.
Accordingly, it is possible to uniformly contracted deforming the elastic sleeve 2 in the circumferential direction.
As a result, it is possible to seal by uniformly adhered over the outer surface B1 the inner surface 2a of the elastic sleeve 2 the entire circumference of the tube Bs, it can be improved further sealing property.
Example 1[0021] Next, it is described with reference to each of the embodiments of the present invention with reference to the accompanying drawings.
The first embodiment, as shown in FIG. 2 (a) (b) and FIG. 3 (d), the stopper member 5, a stopper for a plurality of split holder 3 (the first divided holder 31, the second divided holder 32) as the positioning means 5b member 5 has an end surface 3c parallel to the projecting piece 5b1 of the plurality of split holder 3 of the circumferential end portion 3a adjacent the circumferential direction. Further, during the approaching movement end of the plurality of divided holder 3 by the member 4 clamped, the end surface 3c and projecting piece 5b1 of the peripheral end portion 3a is set so as to contact each other.
Projecting piece 5b1 is the stopper member 5 is protruded (spacer 51) outside the end surface 3c parallel to the plate-shaped mutually peripheral end portion 3a which adjacent in the circumferential direction of the.
[0022] Further, the stopper member 5, clamping member (threaded part) to 4 of the penetrating part 5c as radial and elongated hole 5c1 formed in the elongated, inner surface 3b and the circumferential direction of the plurality of split holder 3 of the peripheral end portion 3a it is preferred to have a sliding contact portion 5d in sliding contact with the.
Sliding contact portion 5d is a pair formed to sandwich the projecting piece 5b1 on the outside circumferential direction of the stopper member 5 (spacer 51), that each form gradually becomes thin tapered toward the circumferential end edge preferable.
Further, on the inner surface 3b of the plurality of split holder 3 of the peripheral end portion 3a, it is preferable to have a tapered inclined recesses 3b1 to become gradually thinner toward the circumferential edge in contact sliding portion 5d and the slide.
[0023] According to the pipe joint A according to Embodiment 1 of the present invention as described above, during the approaching movement end of the plurality of divided holder 3 by the member 4 fastening, since the end face 3c and the projecting piece 5b1 of the peripheral end portion 3a are brought into contact with each other, in tightening member 4 becomes impossible tightening any more.
Accordingly, it is possible to uniform the completion status fastening by the fastening member 4 regardless of the sense of the operator.
As a result, the fastening member 4 tightening eliminates the need for management of the torque due to, who has the advantage that it is possible to have a uniform piping connected to work.
[0024] Then, in Embodiment 1, as shown in FIGS. 1 to 3, the clamping member 4, is opened and the head 4a, in one of the peripheral of a plurality adjacent in the direction dividing the holder 3 of the peripheral end portion 3a a shaft portion 4b is inserted through hole 3f has a threaded part having a screw portion 4c of the screw holes 3g screwed which is opened in the other. The shaft portion 4b is formed in a diameter smaller than the outer diameter of the head 4a and the screw portion 4c. Than the minimum inner diameter of the through hole 3f for inserting the axial direction of the shaft portion 4b threaded parts are formed as towards the maximum outer diameter of the threaded portion 4c is increased.
In the example shown in FIGS. 1 to 3, a through hole 3f in the peripheral end portion 3a of the first divided holder 31 is Hiraki穿respectively, each through Hiraki穿the screw hole 3g on the peripheral end portion 3a of the second divided holder 32 It has opened or in a concave shape to.
In other words, the hole 3f and the screw hole 3g, clamping member (screw part) 4 of the threaded portion 4c and screwed to the female screw of the same inner diameter and is engraved, and the screw portion 4c to the female thread of the through-hole 3f by screwing the male screw comprising a shaft portion 4b is inserted through the through hole 3f. When the shaft portion 4b is inserted through the hole. 3f, head 4a and the screw portion 4c to the hole 3f is prevented from coming off strikes against the axial direction.
Accordingly, there is an advantage that it is possible to prevent the fastening member from the peripheral end portion 3a of the split holder 3 (threaded part) 4 fall out.
As a result, it is possible to deal with the contamination of the product, such as food factories and chemical factories to be used in severe industry excellent safety.
[0025] Particularly, when the split holder 3 and the clamping member (threaded part) 4 is made of metal, as shown in FIG. 1 (b) and 2 (b), a plurality of adjacent the circumferential direction of the split holder 3 either one hole 3f that has been opened in the (first split holder 31) of the peripheral end portion 3a and countersunk hole. The countersunk hole with the fastening member between the head 4a of the (screw part) 4, it is preferable to tighten sandwich the washer 4d made of superior synthetic resin to slip properties.
When configured in this manner, with the clamping fastening member (threaded part) 4, adhesive wear on the frictional heat of the head 4a is a through hole (counterbore) 3f (galling) is not generated, metal powder is not to occur in both the friction.
As a result, it is possible to deal with the contamination of the product, such as food factories and chemical factories to be used in severe industry excellent safety.
In addition, the tightening member (screw part) 4 and the contact portion of the through-hole 3f and the screw holes 3g, through portion 5c (long hole of the positioning means 5b of the shaft portion 4b and the stopper member 5 of the screw parts (projecting pieces 5b1) 5c1 ) the contact portion between, is preferably applied or filled with lubricants.
By excellent washer 4d and lubricants in sliding property, a torque tightening by the tightening member (screw part) 4 can be further reduced.
[0026] Further, the stopper member 5, sliding contact with the clamping elongated hole 5c1 formed in the elongated as a through portion 5c of the member 4 in the radial direction, the inner surface 3b and the circumferential direction of the plurality of split holder 3 of the peripheral end portion 3a sliding has a contact portion 5d, and having inner surface 3b of the plurality of split holder 3 of the peripheral end portion 3a, the slope recess 3b1 gradually become thinner toward the circumferential edge in contact sliding portion 5d and the slide It is preferred.
In this case, the fastening with the approaching movement of the plurality of divided holder 3 by member 4, tapered inclined recesses 3b1 slides along the sliding contact portion 5d of the stopper member 5. Thereby, with respect to the clamping member 4 moves smoothly stopper member 5 is directed radially inward along the elongated hole 5c1.
Therefore, it is possible to reduce the torque tightening by the tightening member 4.
As a result, excellent workability, for example, even a powerless workers, such as women, there is an advantage in that the tightening member 4 in a split holder 3 shut up (fully tighten) can be.
[0027] Long hole 5c1, at the time of the built-in stopper member 5, the fastening member (screw part) 4 of the shaft portion 4b and a screw portion 4c is inserted. However, after incorporation of the stopper member 5, the short direction of the inner diameter of the elongated hole 5c1, than the outer diameter of the clamping member (threaded part) less than the maximum outer diameter of 4 of the head 4a and the screw portion 4c and the shaft portion 4b It is larger.
In other words, the whole of the stopper member 5 is formed of an elastically deformable material, the short direction of the inner diameter of the elongated hole 5c1 is slightly smaller than the outer diameter of the threaded portion 4c, the long hole 5c1 during insertion of the threaded portion 4c It is formed so as to stretch deformation to the short direction. Elongated hole 5c1 In the illustrated example, formed slightly with a small diameter large circular portion than the outer diameter of the threaded portion 4c, was ligated with the small circular portion of an outer diameter substantially the same diameter of the shaft portion 4b "8-shaped" It is.
In addition, as another example, by engraving the clamping member (screw part) 4 of the threaded portion 4c and screwed to the female screw of the same inner diameter of a portion of the length hole 5c1, at the time of the built-in stopper member 5, fastening member or the (threaded parts) 4 of the screw portion 4c that is insertable structure, or change to other shapes such as oval instead of the large circular portion and the small circular sites were linked "8-shaped" it is also possible.
As a result, after the incorporation of the stopper member 5, the fastening member (screw part) 4 of the threaded portion 4c, long hole 5c1 of the stopper member 5 is prevented from coming out caught.
Accordingly, there is an advantage that it is possible to prevent the fall out that the stopper member 5 from the peripheral end portion 3a of the split holder 3.
As a result, it is possible to deal with the contamination of the product, such as food factories and chemical factories to be used in severe industry excellent safety.
In addition, tightening after multiple of approaching movement in or approaching movement of split holder 3 by the member 4, also act external force, such as vibration and shock with respect to such as split holder 3 and the tightening member 4, tightening the stopper member 5 by a member 4 but not positional shift in the axial direction.
Accordingly, it is possible to position the stopper member 5 in the axial direction with a simple structure.
As a result, unexpectedly the stopper member 5 is positioned displaced axially meat over part 2c of the elastic sleeve 2 can be prevented from being swollen with, at the same time excellent in completeness, it no become costly excellent in economic efficiency.
[0028] Additionally, in the example shown in FIGS. 1 to 3, the base end side of the joint body 10, are integrally formed a cylindrical part 11a, such as a ferrule or bush for connection to other tubular body as a connection portion 11 .
Further, in the example shown in FIGS. 1 to 3, is used a rubber sleeve 21 as an elastic sleeve 2. As notches 2c on the inner surface 2a of the rubber sleeve 21, as shown in FIG. 3 (a) ~ (d) , and concave formed at predetermined intervals concave groove 2c1 extending linearly in the axial direction into a plurality each of circumferentially ing.
On the surface of the elastic sleeve 2, the mark 2e for indicating between a plurality of slits 2c adjacent in the circumferential direction (concave groove 2c1) it is provided. In the illustrated example, has four arranged placemarks 2e on the outer surface 2b and the end surface of the elastic sleeve 2 to the circumferential elastic sleeve 2.
Although not illustrated other examples, as a modification of the cut 2c, or to form a concave groove 2c1 extending in a non-linear such as curve, either only a landmark 2e of the outer surface 2b or the end face of the elastic sleeve 2 arrangement or, it is possible to change or place the number of mark 2e in the circumferential direction three or less or five or more.
By the way, in the case of those in which the elastic sleeve 2 is excellent in particular the overall flexibility, such as the rubber sleeve 21, and reduced in diameter deformation to the point where notch 2c (concave groove 2c1) is filled at the time of contraction diameter change form, it more the outside of the meat over the site of the cut 2c (concave groove 2c1) is bulging deformation in the outer surface 2b of the elastic sleeve 2 by condensation diameter change shaped.
To prevent this, it is preferable to align between the plurality of divided holder 3 of the edge portion 3a which a mark 2e of the elastic sleeve 2, adjacent the circumferential direction. Thus, even approaching movement a plurality of split holder 3 by the fastening member 4 in the radial direction, outside the meat over part of the cut 2c (recessed groove 2c1) is, between the plurality of split holder 3 of the peripheral end portion 3a not bulging deformation toward.
[0029] On the outer surface 2b of the elastic sleeve 2 (rubber sleeve 21), it is preferable to provide a low friction portion 2d such that the inner surface of the split holder 3 contact area (frictional resistance) between the (arcuate surface) 3b is reduced. Thus, tightening the elastic sleeve 2 (rubber sleeve 21) reduced in diameter deformed smoothly accompanied by the member 4 to approach the movement of the plurality of divided holder 3, it is possible to reduce the tightening member of the tightening torque of the (screw parts) 4.
In the example shown in FIG. 3 (a) ~ (d) forming, as the low friction portion 2d throughout the axial part or all of the rubber sleeve 21, the cross-section serrated alternating ridges and grooves are axially It is.
Although not shown other examples, as a modification of the low-friction portion 2d, or formed in different uneven shapes between the ridges and the grooves cross serrated, inner surface (arcuate surface) of each divided holder 3 3b in or forms a low-friction portion also may be formed only low-friction portion on the inner surface of the split holder 3 in place of the low-friction portion 2d (arcuate surface) 3b of the outer surface 2b of the elastic sleeve 2.
Example 2[0030] The second embodiment, as shown in FIG. 4 (a) ~ (d) , shows a variation of the joint body 10, the base end side of the joint body 10, for connection to another tube as a connecting portion 11 the structure in which a nut portion 11b and the screw portion 11c is different from the first embodiment shown in FIGS. 1 to 3, and the other configuration is the same as the first embodiment shown in FIGS. 1 to 3 .
In the example shown in FIG. 4 (a) ~ (d) , as the threaded portion 11c, the outer screw engraved on the base end side outer peripheral surface of the joint body 10, the tube connecting port of another tube or other device and configured to screw screwed among which is engraved on the inner peripheral surface.
Although not shown other examples time, as the screw portion 11c, the outer peripheral surface of the joint inner screw engraved on the base end side inner peripheral surface of the main body 10, the other tubular body and other tube connecting port of the device it is also possible to configure so as to engaged with the set has been externally threaded.
Thus, the pipe joint A according to Embodiment 2 of the present invention as described above may be obtained the same effect as in Example 1 described above.
Example 3[0031] The third embodiment, as shown in FIG. 5 (a) ~ (d) , shows a modification of the elastic sleeve 2, the configuration and the resin sleeve 22 used as an elastic sleeve 2, shown in FIGS. 1 to 3 examples 1 and 4 (a) - unlike example 2 shown (d), the embodiment 1 and 4 the other configuration shown in FIGS. 1 to 3 (a) ~ (d) is the same as the second embodiment shown in.
FIG The 5 of 5 (a) example shown in ~ (d-), predetermined as a slit 2c in a resin sleeve 22, a slit (slit) 2c2 extending in the axial direction to be arranged in a zigzag pattern and straight to multiple respective circumferential directions It is notches formed in each interval.
Further, although not illustrated as another example, or multiple notches form a slit (slit) 2c2 in the circumferential direction extending axially from one axial end portion of the resin sleeve 22, over the axial length of the resin sleeve 22 or one of the slits (slit) and the notch formed on, it is also possible to form a slit (slit) extending in a non-linear such as curve.
[0032] Further, on the inner surface 2a of the resin sleeve 22 preferably frictional resistance between the outer surface B2 of the tube B is provided with a high friction portion 2f so as to increase. It improves the pull-out strength of the tube B.
5 In the example shown in (a) ~ (d), unevenness as the high-friction portion 2f over the axial part or all of the inner surface 2a of the resin sleeve 22, alternating annular projection and annular recess in the axial direction It is formed.
Thus, the pipe joint A according to Embodiment 3 of the present invention as described above also, the same effects as in Example 1 and Example 2 described above can be obtained.
[0033] Incidentally, in the illustrated example of previous shows embodiment uses the first divided holder 31 which is divided into two as a plurality of divided holder 3 in the circumferential direction and the second split holder 32 is not limited to this, the circumferential direction three the split holder 3 which are divided or split or quartered to or more than that may be used.
Description of the code
[0034] A tube Ji hand 1 niッpu Hikaru
1a outer circumferential surface 2 Tan of su an have STAB
2b outside 2c meat than ri site
3 divisionホHikaru the inter 3a peripheral end portion
3b inner surface 3b1 inclined recess
3c end surface 3f through hole
3g Neko ji hole 4 associative Circular pay ke member
4a head 4b of the shaft portion
4c Neko ji unit 5 su SuitesッAiluropodaーmember
51 pe have those su gaイドsurface 5a
5b location decision means 5b1 Circular tab
5c through a long hole section 5c1
5d fold tubular body contact portion B
Sのtube insertion space
The scope of the claims
[Claim 1] A nipple provided along the insertion space of the tube,
and the insertion space resilient sleeve deformable radially provided so as to surround the outer periphery of the tubular body formed along the outer peripheral surface of said nipple,
said elastic a plurality of split holder which is provided to be separable outer surface of the elastic sleeve on the outside of the sleeve to and radially covering the circumferential direction,
said elastic sleeve to each other the plurality of divided holder provided over the plurality of divided holder a fastening member is brought close move radially so as to diameter variations,
across the inner surface of the peripheral end portions of the plurality of divided holder adjacent the circumferential direction so as to oppose to said outer surface in a radial direction of said elastic sleeve comprising a stopper member provided, and
the stopper member has said tightening said plurality of meat over part abutting the guide surface in the radial direction of said elastic sleeve which is reduced in diameter deformed along with the approaching movement of the split holder according member pipe joint characterized in that.
[Claim 2] The stopper member, wherein a plurality of said spacers provided immovably in the circumferential direction over the inner surface of the peripheral end portion of the split holder, characterized in that it has an arc-shaped said guide surface on the inside of the spacer pipe joint according to claim 1,.
[Claim 3] The stopper member, a positioning means of the stopper member with respect to the plurality of split holder has an end face parallel to the projecting piece of the peripheral edge portion of the plurality of divided holder adjacent the circumferential direction, wherein by said fastening member during approaching movement end of the plurality of split holder, according to claim 1 or 2 pipe joint, wherein said end face and said projection piece of said peripheral edge portion is set so as to contact each other.
[Claim 4] The fastening member, head and, periphery and the shaft portion for inserting the have been through hole opened in one of the peripheral edge portion of the plurality of divided holders adjacent direction, screw and screw holes are opened in the other has a threaded portion which case, the claim 1 or 2 pipe joint according to, characterized in that than the minimum inner diameter of the through hole has a larger maximum outer diameter of the head and the threaded portion.
[Claim 5] The stopper member, and a long hole which is formed in the longitudinal radially as a through section of the fastening member, and a sliding portion slidably contacting to the inner surface and the circumferential direction of the peripheral end portion of the plurality of divided holders, having, claims the inner surface of the peripheral end portion of the plurality of divided holder, and having a slope recess gradually becomes thinner toward the circumferential end edge in sliding contact with the sliding contact portion 1 or 2 pipe joint according.
[6.] After incorporation of the stopper member, wherein the short direction inside diameter of the elongated hole, as well as smaller than the maximum outer diameter of the threaded portion of the fastening member, characterized in that larger than the outer diameter of the shaft portion the pipe joint of claim 5.