JP2008025659A - Joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint with a resin molded case having reinforced construction for preventing it from breaking up or being fractured. <P>SOLUTION: The joint comprises a joint body 1 having an inserted-into chamber 9 into which a pipe is inserted, and a cover body 10 covering the inserted-into chamber 9. The joint body 1 and the cover body 10 are connected to each other via annular connection cylinder parts 6, 13, and a holding ring 20 of a holder 19 is inserted into the outer peripheries of the connection cylinder parts 6, 13. When diameter enlarging force is given to the connection cylinder parts 6, 13, the holder 19 supports the diameter enlarging force to reinforce the connection cylinder parts 6, 13. The breakup or fracture of the joint case (the joint body 1 or the cover body 10) reinforced by the holder 19 is prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to, for example, a joint that connects between pipe ends in a water supply system or a hot water supply piping system, or a joint that connects a pipe end and a faucet device, and in particular, in a joint in which a case is formed of resin. The present invention relates to a structure for reinforcing the case.

Conventionally, in Patent Document 1 below, as shown in the drawings of the same publication (particularly FIGS. 2 and 6), the case of the pipe joint 12 includes a main body 14, an intermediate ring 18, and a sleeve 16, and a core into which the pipe 24 is inserted. The engagement release member 20, the lock ring 52, and the O-ring 22 are fitted into the portion 26.
JP 2005-188705 A

  In Patent Document 1, when the pipe 24 is subjected to a strong pulling force or a strong impact force due to a water hammer or the like and a diameter expansion force is generated in the case, in particular, the intermediate ring 18 sandwiching the lock ring 52 and There has been a risk that the case may be disassembled or destroyed due to a large impact force applied to the saw-tooth-like locking irregularities (engagement portion 42 and engaged portion 44) between the sleeve 16 and the sleeve 16. About this case, when it shape | molds with resin in order to make manufacture easy or reduce in weight, possibility that the decomposition | disassembly and destruction will arise becomes high.

  An object of the present invention is to reinforce the case and prevent it from being decomposed or broken.

The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 and 2) of the embodiments described later.
The joint according to the first aspect of the present invention includes the joint body 1 having the insertion chamber 9 into which the pipe 25 is inserted, and the lid body 10 that covers the insertion chamber 9, and the joint body 1 and the lid body 10. Are connected to each other by connecting portions 6 and 13, and a holding body 19 is inserted at least on the outer periphery of the connecting portions 6 and 13 between the joint body 1 and the lid body 10.

In the invention of claim 1, when a diameter expansion force is generated in the connecting portions 6, 13 between the joint body 1 and the lid body 10, the expansion force is received by the holding body 19, and the connecting portions 6, 13 are received. Can be reinforced.
In the invention of claim 2 premised on the invention of claim 1, the connecting portions 6 and 13 between the joint body 1 and the lid body 10 form an annular shape on the outer periphery of the insertion chamber 9. Has an opening 12 into which a pipe 25 is inserted. In the invention of claim 2, the pipe 25 can be inserted into the insertion chamber 9 from the opening 12 of the lid 10.

  In the invention of claim 3 premised on the invention of claim 2, the holding body 19 has a holding ring 20 that is fitted on the outer periphery of the connecting portions 6 and 13 between the joint body 1 and the lid body 10. ing. In the invention of claim 3, the diameter expanding force generated in the annular connecting portions 6, 13 can be received by the holding ring 20 of the holding body 19 and the reinforcing function for the connecting portions 6, 13 can be enhanced.

  In the invention of claim 4 based on the invention of claim 3, a center line 19 a is provided at the outer periphery of the connecting portions 6 and 13 between the joint body 1 and the lid body 10 by a holding ring 20 of the holding body 19. The distal end side inner peripheral edge portion 20a of the distal end side inner peripheral edge portion 20a which is the opening 12 side of the lid body 10 and the proximal end side inner peripheral edge portion 20b opposite to the opening 12 is formed on the distal end side inner peripheral edge portion 20a. A locking recess 24 into which the locking portion 21 is engaged is formed. In the invention of claim 4, the retaining ring 20 of the holding body 19 is positioned with respect to the outer periphery of the connecting portions 6 and 13 between the joint body 1 and the lid body 10, thereby further enhancing the reinforcing function for the connecting portions 6 and 13. Can be increased.

  In the invention of claim 5 premised on the invention of claim 3 or claim 4, the holding ring 20 of the holding body 19 is, for example, billed with respect to the connecting portions 6 and 13 between the joint body 1 and the lid body 10. As in the invention of item 6, it is inserted in a press-fitted state. In the invention of claim 5, the connecting portions 6, 13 can be tightened by the holding ring 20, and the reinforcing function for the connecting portions 6, 13 can be further enhanced.

  In the invention of claim 6 premised on the invention of claim 4, the inner diameter D22 of the inner peripheral surface 22 of the holding ring 20 of the holding body 19 is from the inner peripheral edge portion 20a on the proximal end side to the inner peripheral edge portion 20a on the proximal end side. The inner diameter D22 of the inner peripheral surface 22 of the retaining ring 20 is larger than the outer diameter D23 of the outer peripheral surface 23 of the connecting portions 6 and 13 between the joint body 1 and the lid body 10 as it goes toward the portion 20b. The holding ring 20 is enlarged on the proximal end side inner peripheral edge portion 20b side so that the holding ring 20 is a clearance fit with respect to the connecting portions 6 and 13, and the holding ring 20 is held smaller on the distal end side inner peripheral edge portion 20a side. The ring 20 is fit into the connecting portions 6 and 13. In the invention of claim 6, the connecting portions 6, 13 can be tightened by the holding ring 20 to further enhance the reinforcing function for the connecting portions 6, 13, and the holding ring 20 is inserted into the connecting portions 6, 13. easy.

Next, technical ideas other than the claims will be described with reference to the reference numerals in the drawings of the embodiments.
In the seventh invention based on the invention of any one of claims 1 to 6, in the insertion chamber 9, the pipe 25 is pulled out of the joint body 1 by tightening the pipe 25. The split ring 18 to be regulated is fitted.

  In the eighth invention based on the invention of any one of claims 1 to 6, the fitting chamber 9 is reduced in diameter when a pulling force is applied to the pipe 25, and the joint body. A retaining ring 17 that restricts the withdrawal of the pipe 25 from the pipe 1, and a split ring that regulates the withdrawal of the pipe 25 from the joint body 1 by reducing the diameter of the retaining ring 17 and tightening the pipe 25. 18 is fitted.

  In the seventh and eighth inventions, even if a pulling force acts on the pipe 25, the withdrawal of the pipe 25 from the joint body 1 can be restricted.

  In the present invention, the joint case (the joint main body 1, the lid body 10, etc.) can be reinforced by the holding body 19, and can be prevented from being decomposed or broken.

Hereinafter, a joint according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1 (a), in a joint body 1 (a part of a case) formed of a resin such as PPS, a partition tube portion 3 is formed at the center portion of the inner hole 2 in the direction of the center line 2a. A peripheral wall portion 4 is formed on both sides in the direction of the center line 2 a of the partition tube portion 3, and a recess 5 is formed between the peripheral wall portions 4. Further, in the joint body 1, the connecting tube portion 6 extends from the peripheral wall portions 4 along the direction of the center line 2 a of the inner hole 2, and the center line is formed inside the partition tube portion 3. A guide tube portion 8 extends from both sides of the connecting portion 7 formed in the center portion in the direction 2a along the direction of the center line 2a. The outer periphery of the guide tube portion 8, the partition tube portion 3, and the connecting tube An annular insertion chamber 9 is formed between the inner periphery of the portion 6.

  As shown in FIG. 1A, a lid 10 (a part of a case) molded from a resin such as POM has an opening 12 that covers the insertion chamber 9 and communicates with the insertion chamber 9. An end wall portion 11 and a connecting tube portion 13 formed on the outer periphery of the end wall portion 11 are provided. Sawtooth-shaped locking irregularities 14 formed between the inner periphery of the connecting tube portion 13 and the outer periphery of the connecting tube portion 6 of the joint body 1 are engaged with each other so that the connecting tube portions 6 and 13 are connected to each other. They are connected to each other on the outer periphery of the insertion chamber 9 as an annular connecting portion. Further, the intermediate cylinder portion 15 formed of a resin such as POM is applied to the inner periphery of the connecting cylinder portion 6 in the insertion chamber 9, and the end portion of the connecting cylinder portion 6 and the end wall of the lid body 10. It is sandwiched between the inside of the part 11. An O-ring 16 is fitted in the insertion chamber 9 along the inner periphery of the connecting cylinder part 6 between the intermediate cylinder part 15 and both sides of the partition cylinder part 3. A retaining ring 17 formed of a stainless steel plate is fitted into the insertion chamber 9 between the intermediate cylindrical portion 15 and the inside of the end wall portion 11 of the lid body 10. A wave-shaped regulating plate 17a is bent around the periphery. A split ring 18 whose diameter can be reduced is fitted into the insertion chamber 9 between the retaining ring 17 and the inside of the end wall portion 11 of the lid body 10.

  As shown in FIG. 1B, in the holding ring 20 of the holding body 19 formed of a stainless steel plate, the inner peripheral edge portion 20a on the distal end side on both sides in the direction of the center line 19a and the proximal end side opposite to the inner peripheral edge portion 20a. An annular locking portion 21 is bent inwardly at the distal end side inner peripheral edge portion 20a of the inner peripheral edge portion 20b. The inner diameter D22 of the inner peripheral surface 22 of the holding ring 20 gradually increases from the distal end side inner peripheral edge portion 20a toward the proximal end side inner peripheral edge portion 20b, as shown in FIGS. 2 (b) and 2 (c). The outer diameter D23 of the outer peripheral surface 23 of the connecting cylinder portion 13 of the lid body 10 is larger on the proximal end side inner peripheral edge portion 20b side of the retaining ring 20 and at the distal end inner peripheral edge portion 20a side of the retaining ring 20 It is getting smaller. Incidentally, the distal end portion of the connecting cylinder portion 13 abuts on the peripheral wall portion 4 of the joint main body 1, and the outer diameter D23 of the outer peripheral surface 23 gradually increases toward the distal end portion side away from the end wall portion 11. In the holding body 19, the holding ring 20 is fitted on the outer peripheral surface 23 of the connecting cylinder portion 13 from the opening 12 side of the end wall portion 11 on the outer periphery of the lid body 10, and the proximal end side inner peripheral edge portion of the holding ring 20. The holding ring 20 has a clearance fit with respect to the connecting cylinder portion 13 on the side of 20 b, and the holding ring 20 has an interference fit with respect to the connecting cylinder portion 13 on the tip side inner peripheral edge portion 20 a side of the holding ring 20. Yes. Therefore, the holding ring 20 is press-fitted into the outer peripheral surface 23 of the connecting cylinder portion 13. As shown in FIGS. 2 (b) and 2 (c), a locking recess 24 is formed in an annular shape on the outer peripheral surface 23 of the connecting tube portion 13 on the outer periphery of the distal end portion of the connecting tube portion 6 of the joint body 1. On the other hand, the engaging portion 21 of the holding body 19 is engaged, and the proximal end side inner peripheral edge portion 20 b of the holding ring 20 abuts on the peripheral wall portion 4 of the joint body 1.

  As shown in FIG. 2A, when a resin pipe 25 is inserted into the insertion chamber 9 of the joint body 1 from the opening 12 of the lid 10, the inner end of the pipe 25 is connected to the joint body 1. The inner peripheral surface 26 of the pipe 25 faces the outer periphery of the guide tube portion 8, and the outer peripheral surface 27 of the pipe 25 is the inner periphery of the O-ring 16 or the inner periphery of the regulating plate 17 a of the retaining ring 17. It faces the inner periphery of the split ring 18. A space between the outer peripheral surface 27 of the pipe 25 and the inner periphery of the connecting cylinder portion 6 of the joint body 1 is sealed by an O-ring 16. The restriction plate 17 a of the retaining ring 17 is pushed outward against the elasticity and is pressed against the outer peripheral surface 27 of the pipe 25. Although not shown, when a pulling force is applied to the pipe 25, the restricting plate 17a of the retaining ring 17 is bent in the direction of the pulling force and is reduced in diameter so that the outer peripheral surface 27 of the pipe 25 is difficult to be inserted, and the pipe 25 is prevented from being pulled out. . Further, as the diameter of the restricting plate 17a is reduced, the split ring 18 is pressed against the end wall portion 11 of the lid 10 by the restricting plate 17a being pushed in the direction of the pulling force, so the diameter of the split ring 18 is reduced. The outer peripheral surface 27 of the pipe 25 is tightened to prevent the pipe 25 from coming out.

  When a strong pulling force acts on the pipe 25 or a strong impact force due to a water hammer or the like, a saw blade-like engagement between the connecting tube portion 6 of the joint body 1 and the connecting tube portion 13 of the lid body 10 is achieved. There is a possibility that an impact force is applied to the concavo-convex portion 14 and a diameter expanding force may be generated in both the connecting cylinder portions 6, 13. And destruction can be prevented.

In addition to the above embodiment, the following configuration may be used.
* As long as the shape of the holding body 19 has a reinforcing function for both the connecting cylindrical portions 6 and 13, it may not be an annular strip, and may be a C-shaped strip, for example. Further, in the band plate, the cross-sectional shape, the width in the center line direction, and the thickness in the radial direction may be changed. Furthermore, you may abbreviate | omit the latching | locking part 21 engaged in the latching recessed part 24 of the outer peripheral surface 23 of the connection cylinder part 13. As shown in FIG.

* As long as the material of the holding body 19 has a reinforcing function for both the connecting tube portions 6 and 13, a metal such as iron other than stainless steel, or a rubber other than metal may be used.
* The material of the joint body 1 and the lid 10 as a case may be, for example, a metal other than the resin.

  * Regarding the shape of the joint body 1, the guide tube portion 8 formed separately from the partition tube portion 3 may be attached to the partition tube portion 3. Further, the intermediate cylinder portion 15 formed separately may be formed integrally with the joint main body 1 and the lid body 10.

* You may insert the connection cylinder part of the joint main body 1 in the outer periphery of the connection cylinder part of the cover body 10.
* The form of the joint is not limited to the socket type in which a pair of pipes 25 are connected on both sides as in the above embodiment, but the half joint type in which the pipe 25 is connected only on one side, or the cheese type in which the pipe 25 is connected on three sides. It may be.

  * In the above embodiment, the split ring 18 is reduced in diameter with the diameter of the retaining ring 17 and the pipe 25 is tightened. However, the retaining ring 17 is omitted, and the pipe 25 is reduced only by the reduced diameter of the split ring 18. Tighten.

  * In the above embodiment, sealing is performed on the outer peripheral surface 27 side of the pipe 25, but sealing is performed on the inner peripheral surface 26 side of the pipe 31.

(A) is a half sectional view showing a state before inserting a pipe into the joint according to the present embodiment, and (b) is an enlarged sectional view showing only the holding body of (a). (A) is a fragmentary sectional view which shows the state which inserted the pipe in the coupling of Fig.1 (a), (b) (c) is a partial expanded sectional view of Fig.1 (a) and Fig.2 (a). .

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Joint main body, 6 ... Connection cylinder part as a connection part in a joint main body, 9 ... Insertion chamber, 10 ... Cover body, 12 ... Opening of a cover body, 13 ... Connection cylinder part as a connection part in a cover body, 19 The holding body 19a is the center line of the holding body, 20 is the holding ring of the holding body, 20a is the inner peripheral edge on the distal end side of the holding ring, 20b is the inner peripheral edge on the proximal end side of the holding ring, and 21 is the locking of the holding body Part 22, inner circumferential surface of the retaining ring, D 22, inner diameter, 23, outer circumferential surface of the connecting cylinder part, D 23, outer diameter, 24, locking recess in the connecting cylinder part, 25 ... pipe

Claims (6)

In a joint comprising a joint body having an insertion chamber into which a pipe is inserted and a lid body covering the insertion chamber, and the joint body and the lid body are connected to each other by a connecting portion, at least the joint body and the lid body A holding member is inserted into the outer periphery of the connecting portion between the joint and the joint. 2. The joint according to claim 1, wherein a connecting portion between the joint main body and the lid body has an annular shape on an outer periphery of the insertion chamber, and the lid body has an opening into which a pipe is inserted. . The joint according to claim 2, wherein the holding body has a holding ring that is inserted into an outer periphery of a connecting portion between the joint body and the lid. On the outer periphery of the connecting portion between the joint body and the lid, there is an inner peripheral edge on the distal end side that is the opening side of the lid of both sides in the center line direction in the holding ring of the holder, and the opposite side to the opening The joint according to claim 3, wherein a locking concave portion into which a locking portion formed at the distal inner circumferential edge is engaged is formed. The joint according to claim 3 or 4, wherein the holding ring of the holding body is inserted in a press-fitted state into a connecting portion between the joint main body and the lid body. The inner diameter of the inner peripheral surface of the holding ring of the holding body gradually increases from the inner peripheral edge of the holding ring toward the inner peripheral edge of the proximal end, and the outer periphery of the connecting portion between the joint body and the lid. The inner diameter of the inner circumferential surface of the retaining ring is larger than the outer diameter of the surface on the inner peripheral edge side of the retaining ring so that the retaining ring is loosely fitted to the connecting portion, and the distal end side of the retaining ring 5. The joint according to claim 4, wherein the holding ring is fitted to the connecting portion by reducing the size on the inner peripheral edge side.

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