JP2008089184A - Connector of water flow pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector of a water flow pipe which can prevent a connecting end part from being damaged or failing while facilitating connecting work of the water flow pipe. <P>SOLUTION: A connector body 13 constituting the connector 12 is equipped with an insertion tubular part 17 externally fitted with the water flow pipe 11. A synthetic resin sleeve 14 is fitted on the outer circumference of the water flow pipe 11, and has a small size part 14a and a large size part 14b each having a different diameter. The movable sleeve 15 is formed in a nearly cylindrical shape by a metal material, and the inner diameter of the gripped part 15c is formed smaller than the outside diameter of the large diameter part 14b. The large diameter part 14b is tightened by the movable sleeve 15 by externally fitting the movable sleeve 15 on the larger diameter part 14b. As a result, the water flow pipe 11 and the connector 12 are connected by gripping the connecting end part 11a and the large diameter part 14b between the inner circumference face of the gripped part 15c and the outer circumference face of the interpolated tubular part 17. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a connection tool for connecting a water pipe made of synthetic resin such as a water supply pipe, and more particularly to a water pipe connection tool capable of simplifying connection work with the water pipe.

  Conventionally, a connector has been used to connect, for example, a header and a water-conducting pipe made of cross-linked polyethylene or cross-linked polybden such as a water supply pipe. As this connection tool, for example, one disclosed in Patent Document 1 has been proposed. As shown in FIG. 12, the connector 51 includes a connector main body 52 formed in a substantially cylindrical shape with a metal material, and a cylinder formed with a metal material. The moving sleeve 54 is movable along the direction.

  The connector main body 52 is threaded with a header (not shown) at one end and a threaded portion 52a that can be screwed, and at the other end is an insertion tube portion 52b that is inserted inside the connection end portion 53a of the water conduit 53. Projected. The outer diameter of the inner tube portion 52 b is formed to be slightly larger than the inner diameter of the water pipe 53. The moving sleeve 54 has an inner diameter slightly larger than the outer diameter of the water flow pipe 53.

  And in order to connect a header and the water flow pipe 53 using the said connecting tool 51, first, as shown in FIG. 12, the screw part 52a is screwed to a header and the connecting tool main body 52 is connected. Next, the moving sleeve 54 is extrapolated and attached to the water pipe 53, and the moving sleeve 54 is moved from the connection end 53a to the center side of the water pipe 53.

  Subsequently, by using a diameter expanding tool, the diameter of the connection end 53a is increased from the inside so that the outer diameter of the connection end 53a is larger than the inner diameter of the moving sleeve 54, and the expanded connection end 53a is formed into the insertion tube portion 52b. Fits outside. Next, as shown in FIG. 13, the moving sleeve 54 is moved to the connection end 53a side, and the moving sleeve 54 is externally fitted to the enlarged diameter portion of the connection end 53a.

As a result, when the diameter of the connection end 53a is expanded, the inner diameter of the moving sleeve 54 becomes smaller than the outer diameter of the connection end 53a, so that the outer peripheral surface of the connection end 53a is tightened by the inner peripheral surface of the moving sleeve 54. It is done. Then, the connection end portion 53a is sandwiched between the outer peripheral surface of the insertion tube portion 52b and the inner peripheral surface of the movable sleeve 54, the water pipe 53 is connected to the connector 51, and the water pipe 53 is used as a header. Connected.
JP 2000-2384 A

  However, in the conventional connector 51, in order to tighten the connection end portion 53a by the moving sleeve 54, the diameter of the connection end portion 53a must be increased so as to be larger than the inner diameter of the moving sleeve 54. Here, it is conceivable that the inner diameter of the moving sleeve 54 is made smaller than the outer diameter of the connecting end 53 a without expanding the connecting end 53 a, but in this case, the moving sleeve 54 is passed through the water pipe 53. Cannot be extrapolated. Therefore, in the method in which the connection end 53a is sandwiched between the insertion tube portion 52b and the movable sleeve 54 and the connection tool 51 and the water pipe 53 are connected, the diameter of the connection end 53a needs to be increased.

  However, the diameter expansion operation requires a diameter expansion tool and is a very troublesome operation. Further, since the connection end 53a is reduced in diameter from the expanded state to the original state, the work of externally fitting the connection end 53a to the insertion tube portion 52b must be performed immediately before the diameter reduction. . Therefore, there has been a problem that the operation of connecting the water conduit 53 to the connector 51 is very complicated.

  Further, since the diameter of the connection end 53a is forcibly increased using a diameter expansion tool, the thickness is reduced, and the connection end 53a is further reduced by the external fitting of the moving sleeve 54. As a result, there is a problem that the connection end portion 53a may be broken or cracked to be damaged.

  The present invention has been made paying attention to the problems existing in the above-described prior art. The purpose of the present invention is to provide a water pipe connecting tool that can easily connect the water pipe and prevent the occurrence of a problem that the connection end is damaged. .

  In order to solve the above-mentioned problem, the invention according to claim 1 is a connecting tool for connecting a water pipe made of synthetic resin, and is an insertion tube part inserted into a connection end of the water pipe. A connector main body comprising: a synthetic resin extrapolation sleeve that is extrapolated to the connection end of the water conduit; and an extrapolated sleeve that is extrapolated to the water conduit and moves along the axial direction of the extrapolation sleeve. The outer sleeve and a moving sleeve that is externally fitted to the extrapolated sleeve so as to crush the connecting end, and an outer peripheral state of the movable sleeve with respect to the extrapolated sleeve; The gist is that the water conduit is connected to the connector main body by sandwiching the connecting end and the outer sleeve between the outer peripheral surface of the inner cylindrical portion.

  According to a second aspect of the present invention, in the water pipe connecting device according to the first aspect, the outer sleeve has a small-diameter portion formed so that an outer diameter of the outer sleeve is smaller than an inner diameter of the movable sleeve. A large-diameter portion formed larger than the inner diameter of the moving sleeve, and the moving sleeve moves from the small-diameter portion to the large-diameter portion along the axial direction of the extrapolation sleeve. The gist is that the connection pipe and the large-diameter portion are sandwiched between the inner peripheral surface of the moving sleeve and the outer peripheral surface of the insertion tube portion by being fitted, and the water pipe is connected to the connector main body. And

  According to a third aspect of the present invention, in the water pipe connecting device according to the first or second aspect, the outer sleeve includes an inner circumferential surface of the outer sleeve and an outer circumferential surface of the inner tube portion. The gist of the present invention is that the connecting end body is integrally assembled in a state in which the insertion space of the connecting end portion is formed between the connecting end portion and the connecting end portion.

The gist of a fourth aspect of the present invention is that, in the water pipe connecting device according to the first or second aspect, the moving sleeve is integrally assembled with the outer sleeve.
According to a fifth aspect of the present invention, in the water pipe connecting device according to the first or second aspect, the extrapolated sleeve comprises an inner peripheral surface of the extrapolated sleeve and an outer peripheral surface of the inserted cylindrical portion. The insertion end of the connection end portion is formed between the connecting tool body and the moving sleeve is integrally assembled with the outer insertion sleeve.

  According to a sixth aspect of the present invention, in the water pipe connecting tool according to any one of the first to fifth aspects, the connecting tool main body has an extrapolated sleeve contact with which an end face of the extrapolated sleeve abuts. A contact portion is provided, and the connection end portion of the water pipe is inserted to the insertion tube portion beyond the end surface of the insertion sleeve from the contact portion of the insertion sleeve to the depth of the connector body. The gist is that a confirmation hole for visually confirming whether or not is formed.

  A seventh aspect of the present invention is the water pipe connecting device according to any one of the first to sixth aspects, wherein the water pipe is formed of a synthetic resin material excluding a crosslinked body. And

  The gist of an eighth aspect of the present invention is that, in the water pipe connector according to any one of the first to seventh aspects, the moving sleeve is formed of a metal material.

  As described above in detail, according to the invention described in claim 1, the connection work of the water pipe can be easily performed, and the occurrence of the trouble that the connection end is damaged can be prevented. it can.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, when a stress is exerted to bend the water pipe in the connected state of the water pipe, the small diameter portion does not exist. Compared to, the water pipe can be made difficult to bend.

According to the invention described in any one of claims 3 to 5, in addition to the effect of the invention described in claim 1 or 2, the operation of connecting the water pipe can be quickly performed.
According to the invention described in claim 6, in addition to the effects of the invention described in any one of claims 1 to 5, the connection end of the water pipe exceeds the end surface of the extrapolation sleeve by the confirmation hole. Thus, it can be visually confirmed whether or not it is extrapolated to the insertion tube portion.

  According to the invention described in claim 7, in addition to the effects of the invention described in any one of claims 1 to 6, since the connection can be performed without expanding the diameter of the water pipe, the shape is restored. It is possible to connect a water pipe having a small physical force and physical properties.

  According to the invention described in claim 8, in addition to the effect of the invention described in any one of claims 1 to 7, both the connection end portion and the extrapolation sleeve are pushed by approximately the same degree by the moving sleeve. Can be crushed. Therefore, unlike the case where the extrapolation sleeve is formed of a metal material and only the connection end portion is crushed and thinned, the thickness of the connection end portion can be secured to prevent problems such as breakage and damage.

(First embodiment)
Hereinafter, a first embodiment of a water pipe connecting tool embodying the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the connection tool 12 for connecting a water pipe 11 made of synthetic resin such as a water supply pipe is composed of a connection tool body 13, an extrapolation sleeve 14, and a moving sleeve 15. ing. In addition, the water flow pipe 11 may be used for a hot water supply pipe, a drain pipe, an oil supply pipe, or the like.

  The water pipe 11 is formed in a cylindrical shape by a synthetic resin material made of a polymer or a copolymer, that is, polybutene as a synthetic resin material excluding a crosslinked body. Since the water flow pipe 11 is made of polybden, for example, even if the diameter is increased, the water return pipe 11 has a physical property with a small force to return to the original shape before the diameter expansion. And the connection end part 11a for connecting with the connection tool 12 is formed in the one end part (right end part in FIG. 1) of the water flow pipe 11. As shown in FIG.

  The connector main body 13 made of a metal material has a substantially cylindrical shape, and a screw portion 16 is threaded at one end (right end in FIG. 1) of the connector main body 13. Is formed to be able to be screwed to the steel pipe P. The other end portion (the left end portion in FIG. 1) of the connector main body 13 has a cylindrical shape, and is provided with an insertion tube portion 17 that is inserted into the connection end portion 11a.

  In the connector main body 13, ribs 17 a extending along the circumferential direction of the insertion tube portion 17 are provided at a plurality of locations on the outer peripheral surface on the proximal end side of the insertion tube portion 17. Further, on the outer periphery of the proximal end side of the insertion tube portion 17, when the connection end portion 11 a is extrapolated to the insertion tube portion 17, a movement preventing surface that forms an annular shape so that the end surface of the connection end portion 11 a abuts 18 is provided around. On the outer periphery of the movement preventing surface 18, an annular rib 18 a that protrudes in a direction in which the water conduit 11 is extracted from the connector main body 13 is provided.

  As shown in FIG. 2, a tube insertion space 18 b is formed between the outer peripheral surface of the insertion tube portion 17, the movement preventing surface 18, and the inner peripheral surface of the annular rib 18 a. The annular rib 18a has a receiving space 18c that receives the synthetic resin material of the outer sleeve 14 and the connecting end portion 11a pushed out by fitting the movable sleeve 15 to the outer sleeve 14 and the tube insertion space 18b. It communicates and is recessed at a plurality of locations.

  As shown in FIG. 4, the extrapolation sleeve 14 is formed in a substantially cylindrical shape by cross-linked polyethylene or polybden, and the movable sleeve 15 is fitted on the outer sleeve 14. The extrapolation sleeve 14 is crushed to the same extent as the connection end portion 11a when the movable sleeve 15 is fitted, so that the thickness of the connection end portion 11a and the thickness of the extrapolation sleeve 14 become the same extent. It is preferable to use the same material as the water pipe 11.

  The inner diameter of the outer sleeve 14 is slightly larger than the outer diameter of the water conduit 11. The extrapolation sleeve 14 is extrapolated to the connection end 11 a of the water conduit 11, is attached to the outer periphery of the connection end 11 a, and is formed to be movable along the axial direction of the water conduit 11.

  The outer sleeve 14 is formed with a small diameter portion 14a and a large diameter portion 14b having different outer diameters, and is extrapolated from the outer diameter of the large diameter portion 14b formed on one side (right side in FIG. 4) of the outer sleeve 14. The outer diameter of the small diameter portion 14a formed on the other side (left side in FIG. 4) of the sleeve 14 is formed to be small.

  As shown in FIGS. 2 and 4, a locking surface 14 c extending in the radial direction is provided around the outer peripheral surface of the outer sleeve 14 so as to extend perpendicularly to the axis of the outer sleeve 14. Yes. Further, a tapered surface 14d whose outer diameter gradually increases as it goes from the locking surface 14c to the large diameter portion 14b is formed at a position where the small diameter portion 14a is connected to the large diameter portion 14b via the locking surface 14c. Has been. An engaging claw 14e that inclines from the large diameter portion 14b side to the small diameter portion 14a side and projects into the outer sleeve 14 extends in the circumferential direction of the outer sleeve 14 on the inner peripheral surface on the large diameter portion 14b side. Is formed.

  The moving sleeve 15 is formed in a substantially cylindrical shape from brass as a metal material, and is directed from the center of the moving sleeve 15 toward the right end on the inner periphery of one end edge (right end edge in FIG. 4) of the moving sleeve 15. Accordingly, an enlarged diameter portion 15a is formed in which the inner diameter gradually increases. On the other hand, an annular locking portion 15 b that protrudes inward of the moving sleeve 15 is formed on the inner periphery of the other end edge portion (left end edge portion in FIG. 4) of the moving sleeve 15. The inner diameter of the annular locking portion 15b is slightly larger than the outer diameter of the small diameter portion 14a.

  Between the said enlarged diameter part 15a and the cyclic | annular latching | locking part 15b, the clamping part 15c which has a fixed internal diameter is formed. The outer diameter of the small diameter portion 14a is smaller than the inner diameter of the clamping portion 15c, and the outer diameter of the large diameter portion 14b is larger than the inner diameter of the clamping portion 15c. In a state where the moving sleeve 15 is mounted on the small diameter portion 14a and is not externally fitted on the large diameter portion 14b, an annular gap is formed between the inner peripheral surface of the holding portion 15c and the outer peripheral surface of the small diameter portion 14a. . On the inner peripheral surface of the clamping portion 15c, an engaging claw 15e that protrudes into the moving sleeve 15 so as to be inclined from the enlarged diameter portion 15a side to the annular locking portion 15b side extends in the circumferential direction of the moving sleeve 15. Is formed.

  Now, to connect the connector 12 and the water pipe 11, first, as shown in FIG. 2, the connector body 13 and the steel pipe P are connected by the screw portion 16. Next, as shown in FIG. 3, the moving sleeve 15 is fitted to the water pipe 11 so that the enlarged diameter portion 15a is located on the connection end portion 11a side, and then the large diameter portion 14b is connected to the connection end portion. The extrapolation sleeve 14 is extrapolated and attached to the water pipe 11 so as to be positioned on the side of the portion 11a. Next, as shown in FIG. 4, the connection end 11 a is extrapolated to the insertion tube portion 17, the connection end 11 a is inserted into the tube insertion space 18 b, and the end surface of the connection end 11 a is made the movement preventing surface 18. Make contact. At this time, since the diameter of the connection end 11a is not increased by the diameter expansion tool, no load is applied to the connection end 11a.

  Subsequently, as shown in FIG. 1, the outer sleeve 14 is slid along the axial direction of the water pipe 11 toward the movement preventing surface 18. Subsequently, the moving sleeve 15 is slid along the axial direction of the outer sleeve 14 toward the movement preventing surface 18 and moved from the small diameter portion 14a toward the large diameter portion 14b.

  At this time, since the diameter-expanded portion 15a gradually increases in the direction in which the moving sleeve 15 moves, the end surface of the moving sleeve 15 is prevented from being locked to the tapered surface 14d. Furthermore, when the inner peripheral surface of the clamping part 15c moves while slidingly contacting the tapered surface 14d, the clamping part 15c is gradually fitted onto the large diameter part 14b. At this time, the material of the connection end portion 11a pushed out by the movement of the moving sleeve 15 is received in the receiving space 18c, and the material of the large diameter portion 14b is received in the receiving space 18c and the enlarged diameter portion 15a.

  As shown in FIG. 1, the end surface on one end side of the moving sleeve 15 abuts on the annular rib 18a, and when the annular locking portion 15b is locked to the locking surface 14c, the holding portion 15c is fitted on the large diameter portion 14b. Then, the movable sleeve 15 is fitted on the extrapolated sleeve 14. Then, the large-diameter portion 14b and the connection end portion 11a are each tightened in the inner circumferential direction by the sandwiching portion 15c and pressed toward the inner tube portion 17 side.

  As a result, the connecting end portion 11a and the large-diameter portion 14b are sandwiched between the outer peripheral surface of the inner cylindrical portion 17 and the inner peripheral surface of the clamping portion 15c in a state where the movable sleeve 15 is fitted to the outer insertion sleeve 14. . At this time, the large diameter portion 14b and the sandwiching portion 15c are each formed in a cylindrical shape. Therefore, the connection end portion 11a is uniformly clamped by the large diameter portion 14b and the clamping portion 15c from the entire circumference side.

  Further, since both the connection end portion 11a and the large diameter portion 14b are formed of a synthetic resin material, the connection end portion 11a and the large diameter portion 14b are almost crushed by the outer fitting of the movable sleeve 15 respectively. It approaches an integrated state. Further, the connection end portion 11a and the large diameter portion 14b try to return to the shapes before being crushed, and press each other, and the outer peripheral surface of the large diameter portion 14b is in pressure contact with the inner peripheral surface of the sandwiching portion 15c. The inner peripheral surface of the end portion 11 a is in pressure contact with the outer peripheral surface of the insertion tube portion 17.

  Furthermore, the rib 17a bites into the inner peripheral surface of the connection end portion 11a, and the water conduit 11 is difficult to come out of the connection tool main body 13. Further, since the engaging claw 14e engages with the outer peripheral surface of the connection end portion 11a, the engagement claw 14e is moved by the connection end portion 11a even if a force is applied to the outer insertion sleeve 14 in the direction of coming out of the connection tool 12. Engaging firmly, it is possible to prevent the extrapolation sleeve 14 from moving easily. In addition, since the engaging claw 15e is engaged with the outer peripheral surface of the large-diameter portion 14b, the engaging claw 15e is moved by the large-diameter portion 14b even if a force in the direction of coming out of the connection tool 12 acts on the moving sleeve 15. It is firmly engaged and the moving sleeve 15 is prevented from easily moving.

  Accordingly, the passage of the water pipe 11 from the connector 12 is restricted, and the water pipe 11 is connected to the connector 12. In this connected state, a small-diameter portion 14a is mounted on the center side of the water conduit 11 from a portion sandwiched between the large-diameter portion 14b and the inner cylindrical portion 17, and the connection end portion 11a is protected by the small-diameter portion 14a. Has been.

According to the connector 12 of the first embodiment, the following features can be obtained.
(1) The water conduit 11 and the connection tool 12 can be connected by externally fitting the clamping part 15c to the large diameter part 14b attached to the connection end part 11a that has not been expanded. Therefore, it is possible to connect the water conduit 11 and the connector 12 without increasing the diameter of the connection end portion 11a with the diameter expansion tool, and the connection work between the water conduit 11 and the connector 12 can be easily performed. Moreover, compared with the conventional case where the diameter of the connecting end 11a is forcibly increased by the diameter expanding tool, the load applied to the connecting end 11a can be reduced, and the connecting end 11a is damaged due to the load. The risk of being received or damaged can be reduced.

  (2) Further, unlike the conventional case where the connecting end portion must be mounted on the inner tube portion in the expanded diameter state, the connection work of the water conduit 11 does not require early urging. Therefore, the connection work between the water pipe 11 and the connector 12 can be performed with a margin.

  (3) Since the extrapolation sleeve 14 and the water pipe 11 are made of a synthetic resin material, both the connection end portion 11a and the large diameter portion 14b can be crushed by approximately the same extent by the external fitting of the moving sleeve 15. . Therefore, unlike the case where the extrapolated sleeve 14 is made of a metal material and only the connecting end portion 11a whose diameter is enlarged and thinned is further crushed and thinned, the thickness of the connecting end portion 11a is secured and fractured. It is possible to prevent the occurrence of troubles such as damage.

  In addition, the crushed connection end portion 11a and the large diameter portion 14b are brought into an integrated state by being pressed against each other, and the large diameter portion 14b is regarded as the connection end portion 11a and the thickness of the connection end portion 11a is increased. Can be secured. Therefore, even if bending stress or the like acts on the connection portion between the water conduit 11 and the connector 12, it is possible to prevent the occurrence of problems such as deformation, breakage, damage, etc. of the connection end portion 11a. Further, the connection end portion 11a is moved between the outer peripheral surface of the insertion tube portion 17 and the inner peripheral surface of the clamping portion 15c by a force for returning to the shape before the connection end portion 11a and the large diameter portion 14b are crushed. Can be firmly clamped. In addition, when the water flow pipe 11 and the extrapolation sleeve 14 are formed of the same synthetic resin material, the amount by which the connection end portion 11a and the large diameter portion 14b are crushed can be made almost the same, and can be further pressed against each other. The said effect can be exhibited effectively.

  (4) The enlarged diameter portion 15a can prevent the end surface of the moving sleeve 15 and the large diameter portion 14b from being locked. Therefore, the moving sleeve 15 can be smoothly moved to the large-diameter portion 14b side, and the connection work between the water conduit 11 and the connector 12 can be easily performed.

  (5) By the sliding contact between the tapered surface 14d and the sandwiching portion 15c, the sandwiching portion 15c can be externally fitted while gradually crushing the large diameter portion 14b. Therefore, the taper surface 14d is not formed, and the force required for the movement of the movable sleeve 15 can be reduced to facilitate the external fitting operation, compared with the case where the clamping portion 15c is directly externally fitted to the large diameter portion 14b. And can be done promptly.

  (6) The engagement claws 14e and 15e can prevent the extrapolation sleeve 14 and the moving sleeve 15 from moving toward the central portion of the water pipe 11. Accordingly, it is possible to maintain the connection state between the water pipe 11 and the connection tool 12 while maintaining the connection end portion 11a sandwiched by the inner insertion tube portion 17, the outer insertion sleeve 14, and the moving sleeve 15.

  (7) The small-diameter portion 14 a is mounted from the portion sandwiched between the inner peripheral surface of the sandwiching portion 15 c and the outer peripheral surface of the insertion tube portion 17 to the center side of the water conduit 11. Therefore, when the stress which is going to bend the water flow pipe 11 acts on the water flow pipe 11, compared with the case where the small diameter part 14a does not exist, the water flow pipe 11 can be made difficult to bend. Therefore, compared with the case where the water pipe 11 having a reduced thickness due to the external fitting of the movable sleeve 15 is bent directly, the water pipe 11 can be made less likely to be damaged. In particular, in the water conduit 11, it is difficult to bend the position near the distal end edge of the insertion tube portion 17 that is a boundary between the portion sandwiched between the large diameter portion 14 b and the insertion tube portion 17 and the portion not sandwiched. The fear that the water pipe 11 is bent or cracked can be eliminated.

  (8) The connection tool 12 can be connected without expanding the diameter of the water pipe 11. Therefore, when connecting the water pipe 11 and the connection tool 12, unlike the conventional case where the shape return of the water pipe is used, the water pipe 11 such as polybden having a physical property with a small force for returning the shape is connected to the connection tool 12. can do. Therefore, the types of water pipes 11 that can be connected to the connection tool 12 can be increased to widen the range of uses of the connection tool 12.

  (9) Since the outer sleeve 14 is made of a synthetic resin material, the movable sleeve 15 can be easily fitted on the outer sleeve 14, and the connection work between the water conduit 11 and the connector 12 can be performed quickly. It can be carried out. In particular, unlike the case where the outer sleeve 14 is made of a metal material, a very large force is not required for fitting the movable sleeve 15 to the outer sleeve 14, and the water pipe 11 and the connection tool are not required. 12 can be quickly connected. Further, unlike the case where the extrapolation sleeve 14 is formed of a metal material, it is not necessary to form a threaded portion on the extrapolation sleeve 14 and the moving sleeve 15 in order to tighten the extrapolation sleeve 14, and the configuration of the connection tool 12. Can be simplified.

  (10) When the sandwiching portion 15c is externally fitted to the large diameter portion 14b, the synthetic resin material forming the extruded connection end portion 11a is received in the receiving space 18c, and the synthetic resin material forming the large diameter portion 14b. Is received in the receiving space 18c and the enlarged diameter portion 15a. Therefore, the crushed synthetic resin material jumps outward on the end face side of the connection end portion 11a to prevent the movement sleeve 15 from being restricted from moving, and the movable sleeve 15 is securely attached to the extrapolation sleeve 14. The water conduit 11 can be connected to the connector 12 by fitting.

  (11) Since the large-diameter portion 14b and the sandwiching portion 15c are each formed in a cylindrical shape, when the movable sleeve 15 is externally fitted to the outer sleeve 14, the large-diameter portion 14b extends over the entire circumference by the sandwiching portion 15c. The connection end portion 11a is clamped almost uniformly over the entire circumference. Therefore, unlike the case where the portions spaced in the circumferential direction of the connection end 11a are intensively clamped, the load is distributed over the entire circumferential direction of the connection end 11a, and the connection end 11a is damaged. Occurrence of inconvenience can be prevented.

(Second Embodiment)
Hereinafter, a second embodiment of a water pipe connector embodying the present invention will be described with reference to FIGS. In addition, since 2nd Embodiment is a structure which only changed the connector main body 13, the extrapolation sleeve 14, and the movement sleeve 15 of 1st Embodiment, the detailed description is abbreviate | omitted about the same part. .

  As shown in FIG. 7, when the connection end 11 a is extrapolated to the outer periphery of the base end side of the insertion tube portion 17 of the connector body 13, the end surface of the connection end portion 11 a is contacted. An annular movement preventing surface 18 is provided so as to be in contact with each other. On the outer periphery of the movement preventing surface 18, an annular outer peripheral portion 19 that protrudes in the direction in which the water conduit 11 is extracted from the connector main body 13 is provided. On the peripheral surface of the annular outer peripheral portion 19, confirmation holes 19 a are formed through the annular outer peripheral portion 19 at four positions at equal intervals.

  The annular rib 18a having an inner diameter larger than the inner diameter of the annular outer peripheral portion 19 is provided around the outer periphery of the annular outer peripheral portion 19, and a locking protrusion 20 is provided on the inner periphery of the distal end of the annular rib 18a. It is formed to extend in the circumferential direction of the annular rib 18a. Further, an outer sleeve contact portion 21 that can contact the end surface of the connection end portion 11a is formed on the inner periphery of the center of the annular rib 18a so as to extend in the circumferential direction of the annular rib 18a. The confirmation hole 19 a is formed in the depth of the connector main body 13 from the outer sleeve contact portion 21. The tube insertion space 18 b is formed between the outer peripheral surface of the inner cylindrical portion 17, the movement preventing surface 18, and the inner peripheral surface of the annular outer peripheral portion 19.

  The extrapolated sleeve 14 formed in a substantially cylindrical shape by cross-linked polyethylene or polybden has the large diameter portion 14b formed on one side (right side in FIG. 7) and the small diameter portion on the other side (left side in FIG. 7). 14a is formed. As shown in FIG. 5, in the outer sleeve 14, locking projections 23 are formed on the outer peripheral surface on the distal end side from the large diameter portion 14 b at four locations at equal intervals in the circumferential direction of the outer sleeve 14. Yes. In the outer sleeve 14, mounting projections 24 are formed at four positions at equal intervals in the circumferential direction of the outer sleeve 14 on the outer peripheral surface at the tip on the small diameter portion 14 a side. In addition, as shown in FIG. 7, an annular groove 25 is formed on the inner periphery of the other end edge portion (left end edge portion in FIG. 7) of the moving sleeve 15 formed in a substantially cylindrical shape with brass. It is recessed along the circumferential direction.

  As shown in FIGS. 6 and 7, the connector 12 of the second embodiment is integrally formed by assembling an extrapolation sleeve 14 and a moving sleeve 15 to the connector body 13. Specifically, the locking projection 23 side of the extrapolation sleeve 14 is inserted inside the annular rib 18a, the end surface of the extrapolation sleeve 14 is brought into contact with the extrapolation sleeve contact portion 21, and the latch projection 23 Then, the locking protrusion 20 is locked, and the extrapolation sleeve 14 is assembled to the connector body 13 integrally. In this assembled state, between the end surface of the outer sleeve 14 and the distal end surface of the annular outer peripheral portion 19, the outer sleeve 14 and the connecting end portion 11a pushed out by the outer fitting of the movable sleeve 15 to the outer sleeve 14 are connected. A receiving space 18c for receiving the synthetic resin material is formed. Further, an insertion space S for the connecting end portion 11 a is formed between the inner peripheral surface of the outer insertion sleeve 14 and the outer peripheral surface of the inner insertion cylinder portion 17.

  Further, the movable sleeve 15 is extrapolated from the small diameter portion 14a side of the extrapolated sleeve 14, and moved to the large diameter portion 14b side to lock the mounting projection 24 and the annular recess 25, and the movable sleeve 15 is extrapolated. 14 is assembled integrally. As a result, the connecting tool 12 is formed by assembling the extrapolation sleeve 14 and the moving sleeve 15 integrally with the connecting tool body 13.

  In order to connect the connector 12 and the water pipe 11, first, the connector body 13 and the steel pipe P are connected by the screw portion 16 as shown in FIG. 6. Next, as shown in FIG. 7, the connection end portion 11 a is inserted into the insertion space S, and the insertion tube portion 17 is inserted into the connection end portion 11 a. Further, the connection end 11 a is inserted into the tube insertion space 18 b, and the end surface of the connection end 11 a is brought into contact with the movement preventing surface 18. At this time, since the extrapolation sleeve 14 is assembled to the connector body 13 and the movable sleeve 15 is assembled to the extrapolation sleeve 14, the extrapolation sleeve 14 is extrapolated to the connection end portion 11a, and the movable sleeve 15 passes through. Extrapolated to the water tube 11.

  Subsequently, as shown in FIG. 8, the moving sleeve 15 is slid along the axial direction of the outer sleeve 14 toward the movement preventing surface 18 and moved from the small diameter portion 14a toward the large diameter portion 14b. Then, the clamping part 15c is gradually fitted over the large diameter part 14b. At this time, the material of the connection end portion 11a pushed out by the movement of the moving sleeve 15 is received in the receiving space 18c, and the material of the large diameter portion 14b is received in the enlarged diameter portion 15a.

  When the end face on one end side of the moving sleeve 15 comes into contact with the annular rib 18 a, the holding portion 15 c is externally fitted to the large diameter portion 14 b, and the moving sleeve 15 is externally fitted to the extrapolating sleeve 14. Then, the large-diameter portion 14b and the connection end portion 11a are each tightened in the inner circumferential direction by the sandwiching portion 15c and pressed toward the inner tube portion 17 side.

  As a result, the connecting end portion 11a and the large-diameter portion 14b are sandwiched between the outer peripheral surface of the inner cylindrical portion 17 and the inner peripheral surface of the clamping portion 15c in a state where the movable sleeve 15 is fitted to the outer insertion sleeve 14. . Further, the material of the connection end 11a and the extrapolation sleeve 14 pushed out by the movement of the movable sleeve 15 is received in the receiving space 18c, and the material of the extrapolation sleeve 14 is also received in the enlarged diameter portion 15a. The material does not enter the confirmation hole 19a. Therefore, it is possible to visually recognize whether or not the end surface of the connection end portion 11a is in contact with the movement preventing surface 18 through the confirmation hole 19a. That is, since the confirmation hole 19a is formed in the depth of the connection tool main body 13 from the outer sleeve contact portion 21 with which the end surface of the outer sleeve 14 abuts, the connection end portion of the water pipe 11 is formed by the confirmation hole 19a. It can be visually confirmed whether or not 11a has been extrapolated to the inner cylindrical portion 17 beyond the end surface of the outer sleeve 14.

  Therefore, according to the second embodiment, the effects (1) to (5) and (7) to (11) of the first embodiment can be exhibited, and the following effects can be exhibited. . The extrapolation sleeve 14 and the moving sleeve 15 are integrally assembled to the connector main body 13. Therefore, when connecting the water conduit 11 and the connector 12, the operation | work which mounts the extrapolation sleeve 14 and the movement sleeve 15 to the water conduit 11 can be abbreviate | omitted. Further, when the extrapolation sleeve 14 and the moving sleeve 15 are provided separately from the connector main body 13, if the water pipe 11 is tilted, the extrapolation sleeve 14 and the movable sleeve 15 move along the water pipe 11. It is possible to prevent the occurrence of inconvenience. Accordingly, the connection work between the water pipe 11 and the connection tool 12 can be performed quickly.

In addition, you may change each said embodiment as follows.
In each embodiment, the enlarged diameter portion 15a of the moving sleeve 15 may be omitted. Further, the tapered surface 14d of the extrapolation sleeve 14 may be omitted.

  In each embodiment, the rib 17a is provided around the insertion tube portion 17, but the rib 17a is formed in a tapered shape that gradually inclines outward from the distal end side to the proximal end side of the insertion tube portion 17. Alternatively, the outer peripheral surface of the insertion tube portion 17 may be formed in a stepped shape by the ribs 17a. Further, the rib 17a may be omitted.

  In the first embodiment, the engaging claw 14e is formed on the extrapolation sleeve 14 and the engaging claw 15e is formed on the moving sleeve 15. However, the following changes may be made. For example, at least one of the engaging claws 14 e and the engaging claws 15 e may be interspersed on the inner periphery of the extrapolation sleeve 14 and the moving sleeve 15. Alternatively, the engaging claws 14e and 15e may be omitted. The engaging claw 14e may be formed on the extrapolation sleeve 14 of the second embodiment, and the engaging claw 15e may be formed on the moving sleeve 15.

  -In 1st Embodiment, the end surface of the annular rib 18a may be used as the extrapolation sleeve contact part 21, and the confirmation hole 19a may be formed in the surrounding surface of the annular rib 18a. In the second embodiment, the confirmation holes 19a are provided at four locations, but the positions and number of the confirmation holes 19a may be arbitrarily set.

  In each embodiment, the extrapolation sleeve 14 is made of a synthetic resin material and the moving sleeve 15 is made of a metal material. However, the extrapolation sleeve 14 and the moving sleeve 15 may be made of a synthetic resin material, respectively. Further, the moving sleeve 15 may be formed of an alloy, soft copper, iron, stainless steel, or the like, and the extrapolating sleeve 14 may be formed of cross-linked polybuden or the like.

  -In each embodiment, although the water pipe 11 made from polybden was used, you may use the water pipe 11 formed with polyethylene, a polypropylene, etc. as a synthetic resin material except a crosslinked body. Alternatively, a water pipe 11 made of cross-linked polybutene or cross-linked polyethylene may be used.

  In each embodiment, the small diameter portion 14a and the large diameter portion 14b are formed in the extrapolation sleeve 14 so as to have different outer diameters, but may be modified as follows. As shown in FIGS. 9 and 10, the small diameter portion 14a of the extrapolation sleeve 14 may be omitted, and the extrapolation sleeve 14 may be configured with only the large diameter portion 14b. At this time, the annular locking portion 15b of the moving sleeve 15 may be omitted.

  Then, as shown in FIG. 10, the moving sleeve 15 is extrapolated and attached to the connection end 11a side of the water conduit 11, and subsequently, the extrapolation sleeve 14 is extrapolated and attached to the connection end 11a side. Subsequently, as in the first embodiment, the connecting end portion 11a is extrapolated to the insertion tube portion 17, the outer insertion sleeve 14 is slid to the connecting end portion 11a side, and the extrapolation is performed as shown in FIG. The moving sleeve 15 is fitted on the large diameter portion 14 b of the sleeve 14.

  As a result, when the clamping portion 15c is externally fitted to the large diameter portion 14b, the connection end portion 11a and the large diameter portion 14b are clamped between the outer peripheral surface of the insertion tube portion 17 and the inner peripheral surface of the clamping portion 15c. Is done. Therefore, in addition to the effects (1) to (4) and (8) to (11) of the embodiment, the material of the extrapolation sleeve 14 can be saved by omitting the small diameter portion 14a.

  In the second embodiment, the outer sleeve 14 is assembled to the connector main body 13 and the moving sleeve 15 is assembled to the outer sleeve 14 so as to be integrally formed. However, the following modifications may be made. The connecting tool body 13 and the extrapolation sleeve 14 are assembled, and when the water pipe 11 and the connecting tool 12 are connected, the moving sleeve 15 provided separately from the connecting tool body 13 is extrapolated to the water pipe 11, You may make it move to the connector main body 13 side, and may externally fit in the extrapolation sleeve 14. FIG. Alternatively, the moving sleeve 15 is assembled to the extrapolated sleeve 14 and formed integrally with the outer sleeve 14 so as to be separate from the connector main body 13. Then, when the water pipe 11 and the connector 12 are connected, the extrapolation sleeve 14 to which the movable sleeve 15 is assembled is extrapolated to the water pipe 11 and moved to the connector main body 13 side so that the extrapolation sleeve 14 is moved to the connector main body. 13 is assembled. Thereafter, the movable sleeve 15 may be fitted on the extrapolated sleeve 14.

Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.
(1) An engaging claw that engages with the outer peripheral surface of the water conduit is formed on the inner peripheral surface of the outer sleeve, and the inner peripheral surface of the movable sleeve is engaged with the outer peripheral surface of the outer sleeve. 9. An engagement claw is formed, and each engagement claw is formed so as to be inclined from the connection end side to the center side of the water pipe, respectively. The water pipe connector as described in 1. When configured in this way, when a force in the direction of pulling out from the connector body is applied to the extrapolation sleeve and the moving sleeve, the engaging claw is firmly engaged by the connecting end and the extrapolation sleeve, and the extrapolation sleeve and the movable sleeve Is prevented from easily moving toward the center of the water pipe. Therefore, it is possible to maintain the connection state of the water pipe while maintaining the connection end portion sandwiched by the inner insertion tube portion, the outer insertion sleeve, and the moving sleeve.

  (2) The water conduit according to any one of claims 1 to 8 and the technical idea (1), wherein the extrapolated sleeve is formed of the same synthetic resin material as the water conduit. Connection tool. When comprised in this way, when a movement sleeve is externally fitted by the extrapolation sleeve, both a connection end part and an extrapolation sleeve can be crushed to the same extent.

  (3) The connector main body is formed with a receiving space for receiving a connection end portion pushed out by an external fitting of the movable sleeve to the extrapolation sleeve and a synthetic resin material forming the extrapolation sleeve. The water pipe connecting device according to any one of claims 1 to 8, and the technical ideas (1) and (2). When comprised in this way, the malfunction which the movement of a movement sleeve is inhibited by the synthetic resin material which forms the crushed connection end part and an extrapolation sleeve can be prevented.

  (4) The inner diameter of the edge of the one end of the moving sleeve is formed with a diameter-expanding portion whose inner diameter gradually increases from the central portion toward the one end side. The water conduit connector according to any one of claims 1 to 8 and the technical ideas (1) to (3). When configured in this way, it is possible to prevent the end face of the moving sleeve and the extrapolation sleeve from being locked, and the moving sleeve can be smoothly moved to the extrapolation sleeve side to facilitate the connection work with the water conduit. Can do.

  (5) The technically characterized in that the enlarged-diameter portion receives a synthetic resin material that forms an extrapolation sleeve pushed out by an external fitting of the movable sleeve to the extrapolation sleeve in cooperation with the acceptance space. The water pipe connector as described in Idea (4). When comprised in this way, the malfunction which the movement of a movement sleeve is inhibited by the synthetic resin material which forms the crushed extrapolation sleeve can be prevented.

  (6) A tapered surface in which an outer diameter gradually expands toward the large diameter portion is formed at a position connecting the small diameter portion to the large diameter portion. The water pipe connector according to claim 8. When configured in this way, as the moving sleeve moves, the large-diameter portion can be gradually crushed by the moving sleeve, and the force required for moving the moving sleeve can be reduced to easily and quickly perform the external fitting operation. It can be carried out.

The sectional side view which shows the connection state of the connection tool of 1st Embodiment, and a water flow pipe. The disassembled perspective view which shows the connection tool of 1st Embodiment. The perspective view of the state which attached the extrapolation sleeve and the movement sleeve to the water flow pipe. FIG. 4 is a side sectional view showing a state before the moving sleeve is fitted on the extrapolation sleeve. The disassembled perspective view which shows the connection tool of 2nd Embodiment. The disassembled perspective view which shows the connection tool and water pipe of 2nd Embodiment. FIG. 4 is a side sectional view showing a state before the moving sleeve is fitted on the extrapolation sleeve. The sectional side view which shows the connection state of the connection tool of 2nd Embodiment, and a water flow pipe. The disassembled perspective view which shows the connection tool of another example. The sectional side view which attached the extrapolation sleeve and the movement sleeve to the water flow pipe. Side sectional drawing which shows the connection state of the connection tool of another example, and a water flow pipe. The sectional side view which shows the conventional connection tool. The sectional side view which shows the connection state of the conventional connector and a water pipe.

Explanation of symbols

  S ... insertion space, 11 ... water pipe, 11a ... connection end, 12 ... connection tool, 13 ... connection tool body, 14 ... extrapolation sleeve, 14a ... small diameter part, 14b ... large diameter part, 15 ... moving sleeve, 17 ... Inserted cylinder part, 19a ... Check hole, 21 ... External sleeve contact part.

Claims (8)

A connector for connecting a water pipe made of synthetic resin,
A connector main body having an insertion tube portion inserted into a connection end portion of the water pipe;
A synthetic resin extrapolation sleeve extrapolated to the connection end of the water conduit;
The movable sleeve is extrapolated to the water conduit and is moved along the axial direction of the extrapolated sleeve to be externally fitted to the extrapolated sleeve so as to crush the extrapolated sleeve and the connecting end. When the movable sleeve is externally fitted to the extrapolated sleeve, the connecting end portion and the extrapolated sleeve are sandwiched between the inner peripheral surface of the movable sleeve and the outer peripheral surface of the inner cylindrical tube portion. Is connected to the connector main body. The extrapolation sleeve is formed with a small diameter portion formed so that an outer diameter of the extrapolation sleeve is smaller than an inner diameter of the movable sleeve, and a large diameter portion formed larger than an inner diameter of the movable sleeve. The outer sleeve moves from the small diameter portion to the large diameter portion along the axial direction of the outer insertion sleeve, and the moving sleeve is fitted on the larger diameter portion, whereby the inner peripheral surface of the moving sleeve and the outer peripheral surface of the inner insertion cylindrical portion are The connecting pipe connecting device according to claim 1, wherein the connecting end portion and the large-diameter portion are sandwiched between the connecting pipe main body and the connecting pipe main body. The extrapolation sleeve is integrally assembled to the connector main body in a state where an insertion space of the connection end portion is formed between the inner peripheral surface of the extrapolation sleeve and the outer peripheral surface of the insertion tube portion. The water pipe connecting tool according to claim 1 or 2, wherein the water pipe connecting tool is provided. The water pipe connecting tool according to claim 1 or 2, wherein the moving sleeve is integrally assembled with the extrapolation sleeve. The extrapolation sleeve is integrally assembled to the connector main body in a state where an insertion space of the connection end portion is formed between the inner circumferential surface of the extrapolation sleeve and the outer circumferential surface of the insertion tube portion, The water pipe connecting tool according to claim 1 or 2, wherein the moving sleeve is integrally assembled with the extrapolation sleeve. The connection tool main body is provided with an extrapolation sleeve abutting portion with which an end face of the extrapolation sleeve abuts, and a connecting end portion of a water pipe is provided at the depth of the connection tool main body from the outer insertion sleeve abutting portion. 6. A confirmation hole for visually confirming whether or not the outer sleeve has been extrapolated to the inner cylindrical portion beyond the end surface of the outer sleeve is formed. The water pipe connector as described in 1. The said water pipe is formed of the synthetic resin material except a crosslinked body, The connection tool of the water pipe as described in any one of Claims 1-6 characterized by the above-mentioned. The water pipe connecting tool according to any one of claims 1 to 7, wherein the moving sleeve is formed of a metal material.

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