JP4428625B2 - Reinforcement structure at the connection part of the resin header - Google Patents

Description

  The present invention relates to a connection of a resin header that connects a main water supply pipe or a main hot water supply pipe and a plurality of branch pipes and branches the main water supply pipe or the main hot water supply pipe into a plurality of branch pipes in a piping system of a water supply / hot water supply system. It is related with the reinforcement structure in a part.

Conventionally, a header is used to branch a main water supply pipe or a main hot water supply pipe to each water supply device in a house. As a connection structure between the header and the joint, the following structure is known (for example, see Patent Document 1). The header is made of synthetic resin for weight reduction, and a flange is provided at the tip of the branch pipe. The metal joint connected to the branch pipe part is provided with an insertion part and a flange, and the insertion part is inserted into the branch pipe so that the flanges face each other. Then, a band is attached to the flange portion with the flanges butted together, and the branch pipe portion (branch pipe) of the header and the joint member are connected.
Japanese Patent Laid-Open No. 2002-147678 (Section 3, Page 5, and FIG. 6)

  By the way, in a water supply / hot water supply piping system, for example, when a water hammer (water hammer) that occurs when a faucet is suddenly closed occurs repeatedly, the connection between the flange of the header branch pipe and the flange of the joint member Force acts to allow the joint member to escape from the branch pipe, and this force is transmitted to both flanges via the band. The force greatly affects the flange on the header side of the synthetic resin, which is insufficient in strength compared to the metal, and the flange portion made of the synthetic resin may be damaged. There was a problem that the connection strength with the member was lowered. The same problem occurs when the main water supply pipe or the main hot water supply pipe is connected via the joint member at the opening end of the header body.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose is to reinforce the connection part of the header body or branch pipe in the resin header and improve the connection strength of the connection part between the header body or branch pipe and the joint member. It is in providing the reinforcement structure in.

In order to achieve the above object, the reinforcing structure in the connecting portion of the resin header according to the first aspect of the present invention includes a cylindrical header body and a branch pipe projecting from a side portion of the header body. The header body is formed by connecting a flange formed by a synthetic resin to a flange of a joint member made of metal with a flange projecting from the opening end of the header body or the opening of the branch pipe. Alternatively, a reinforcing member made of metal is fitted into the annular groove formed on the back side of the flange of the branch pipe so as to reinforce the header body or the flange of the branch pipe, and the connecting member is attached to the flange via the reinforcing member. It is, that the header flanges projecting from the opening of the open end or the branch pipe of the main body is configured so that formed thicker than the flange of the joint member It is an feature.

  According to a second aspect of the present invention, there is provided the reinforcing structure in the connecting portion of the resin header according to the first aspect, wherein the reinforcing member is formed in an L-shaped cross section, and one side piece thereof is an inner bottom surface of the annular groove. The other side piece is configured to engage with the back surface of the header body or the flange of the branch pipe.

  The reinforcing structure in the connecting portion of the resin header according to claim 3 is the invention according to claim 1 or 2, wherein the reinforcing member is formed in a substantially C shape having an opening. .

According to the present invention, the following effects can be exhibited.
According to the reinforcing structure of the connecting portion of the resin header according to the first aspect of the present invention, a metal reinforcing member reinforces the header body or the flange of the branch pipe in the annular groove on the back side of the flange of the header body or the branch pipe. Therefore, it is possible to reinforce the connection part of the header body or the branch pipe in the resin header, and to improve the connection strength of the connection part between the header body or the branch pipe and the joint member. it can.

  According to the second aspect of the present invention, one side piece of the reinforcing member formed in an L-shaped cross section is engaged with the inner bottom surface of the annular groove, and the other side piece is on the back surface of the header body or the flange of the branch pipe. Since it is engaged, the other side piece of the reinforcing member receives the force applied to the flange, and the one side piece can support it. Therefore, the effect of the invention according to claim 1 can be enhanced.

  According to the third aspect of the invention, since the reinforcing member is formed in a substantially C shape having an opening, the reinforcing member is easily fitted into the header body or the annular groove of the branch pipe from the opening. In addition to the effects of the invention according to claim 1 or 2, the reinforcing member can be easily attached to the annular groove.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, the header body 11 has a substantially cylindrical shape, and a flow path 12 having a circular cross section extending in the length direction of the header body 11 is formed therein. A first flange 13 having an annular shape is provided on the outer peripheral surface of both opening end portions of the header body 11, and a first annular groove 14 is provided on the back side of the first flange 13. The main pipe 53 is connected to one open end through a tubular joint member 15, and the other closing member is connected to the other end.

  On the side of the header body 11, a plurality of branch pipes 16 having a cylindrical shape and communicating with the flow path 12 of the header body 11 are provided so as to extend in a direction orthogonal to the header body 11. An annular first flange 13 is provided around the opening of the branch pipe 16, and a first annular groove 14 is provided on the back side of the first flange 13. A branch pipe 17 extending from a faucet device such as a sink and a vanity not shown inside the house is connected to the branch pipe 16 via a joint member 15. The header body 11 and the branch pipe 16 are integrally injection-molded with a synthetic resin to form a resin header 18. As the synthetic resin, engineering plastic is used, and specific examples include polyacetal (POM), polyphenylene sulfide (PPS), polyamide (PA), cross-linked polyethylene, or polyphenylene sulfone (PPSU).

  As shown in FIG. 4, the opening end of the header body 11 and the opening of the branch pipe 16 are formed in an annular shape extending in parallel from the opening end and the inward inward direction to the rounded surface 19 and the axis of the branch pipe 16. A straight surface 20 and a tapered surface 21 that is reduced in diameter as it goes inward of the branch pipe 16 from the straight surface 20 are formed. In addition, a seal surface 22 is provided on the inner side.

  As shown in FIG. 2, the first annular groove 14 is fitted with a reinforcing member 23 formed in a ring shape with an L-shaped cross section by a metal having a spring property. In order to fit the reinforcing member 23 in the first annular groove 14 formed on the back end of the first flange 13 of the opening end of the header body 11 and the opening of the branch pipe 16, the outer diameter of the first annular groove 14 is increased. It is formed together. It is preferable that the metal having the spring property forming the reinforcing member 23 is stainless steel having a plate thickness of 0.1 to 1.0 mm and a type of SUS301, SUS304, SUS316, or the like.

  As shown in FIG. 3, the reinforcing member 23 is formed by cutting a reinforcing material 24 bent into an L-shaped cross section into a predetermined length and then bending it into a C-shape in the direction indicated by the arrow in FIG. 3. Is done. As shown in FIG. 2, an opening 25 is formed in the reinforcing member 23, and the opening 25 is expanded and fitted into the first annular groove 14 of the branch pipe 16. The opening 25 of the reinforcing member 23 is formed in such a size that the reinforcing member 23 does not fall off from the first annular groove 14 and is designed in a range that does not exceed approximately one third of the circumference. One side piece 26 of the reinforcing member 23 engages with the inner bottom surface of the first annular groove 14, and the other side piece 27 bent at a right angle from the side edge of the one side piece 26 is formed on the back surface of the first flange 13 ( It is fitted so as to engage with the back surface.

  As shown in FIG. 1, the joint body 28 constituting the joint member 15 is formed of a metal such as an alloy (brass, bronze, etc.), and a cylindrical projecting portion 29 is formed at the base end of the joint body 28. Is provided. A pair of receiving grooves 30 are recessed in the circumferential direction on the outer peripheral surface of the projecting portion 29, and a seal ring 31 made of a rubber material and having a circular cross section is fitted into each receiving groove 30. Further, the outer peripheral surface of the tip of the protruding portion 29 is a circular arc surface 32. A second flange 33, a second annular groove 34, and a nut portion 35 are formed in order from the protruding portion 29 toward the distal end side. An inner screw 36 is threaded on the inner peripheral surface of the nut portion 35, and a push ring 37 having a substantially cylindrical shape is screwed together with a metal like the joint body 28. An annular contact surface 38 extending to the inner center of the joint body 28 is formed on the inner peripheral surface on the proximal end side of the joint body 28. Annular grooves 39 are provided at two locations on the inner peripheral surface of the joint body 28 from the contact surface 38, and a synthetic rubber seal ring 40 is fitted in each annular groove 39. It is worn. An engagement surface 41 is formed on the inner peripheral surface on the tip side from these annular grooves 39 so as to extend in the circumferential direction.

  On the engagement surface 41, a pair of lock rings 42 are disposed as restricting means for preventing the branch pipe 17 from coming out of the joint body 28. Both lock rings 42 are made of a base ring made of a metal such as stainless steel and project from the base ring with the same length, and are inclined in the insertion direction of the branch pipe 17 toward the inside of the base ring. It is composed of a plurality of restricting pieces. A spacer 43 made of metal such as stainless steel is interposed between the lock rings 42. Then, in a state where the lock ring 42 is accommodated in the joint main body 28, the push ring 37 is screwed and connected to the joint main body 28, thereby restricting the lock ring 42 from being extracted from the joint main body 28. As the branch pipe 17 connected to the joint member 15, a resin pipe formed from a polyolefin such as crosslinked polyethylene or polybuden is generally used. In connecting the branch pipe 17 to the joint member 15, a cylindrical incore 50 is inserted at the tip of the branch pipe 17. The in-core 50 is for preventing the tip of the branch pipe 17 from being deformed by heat or pressure. The joint member 15 includes the joint body 28, the protruding portion 29, the second flange 33, the second annular groove 34, the push ring 37, and the like.

  As shown in FIGS. 6A and 6B, the flange 13 of the resin header 18 and the flange 33 of the joint member 15 are connected by a quick fastener 44 as a connecting member formed in a substantially C ring shape. The quick fastener 44 is formed by bending a plate made of a metal having a spring property symmetrically. There is an opening between the front ends of the quick fastener 44, and hinges 45 are bent at a substantially equal interval on the circumference of the quick fastener 44. It is bent and formed so as to spread toward the direction. Further, sandwiching holes 48 are formed in both side walls 47 of the quick fastener 44 so as to extend in the circumferential direction so as to avoid the hinge portion 45. The widths of the first flange 13 and the second flange 33 are set to be approximately the same as the interval between the inner walls 49 that form the holding holes 48.

  In order to connect the branch pipe 16 of the resin header 18 and the joint member 15, first, as shown in FIG. 1, first, the base end of the joint body 28 is connected to the opening end of the header body 11 or the opening of the branch pipe 16. The protrusion 29 provided in the part is inserted. At this time, insertion of the protrusion 29 is facilitated by the arc surface 32 provided on the outer peripheral surface of the tip of the protrusion 29 and the rounded surface 19 provided at the opening end of the header body 11 or the opening of the branch pipe 16. . Then, the seal ring 31 fitted in the receiving groove 30 on the outer peripheral surface of the protruding portion 29 is inserted into the seal surface 22 provided inside the opening end of the header body 11 or the opening of the branch pipe 16 while sliding. Is done. The protrusion 29 of the joint body 28 is inserted until the first flange 13 formed on the resin header 18 and the second flange 33 formed on the joint member 15 are abutted.

  And the quick fastener 44 is pressed from the guide part 46 provided in the opening part to the connection part by which the 1st flange 13 and the 2nd flange 33 were faced | matched. Then, the opening of the quick fastener 44 is expanded by the elastic force, and the first flange 13 and the second flange 33 are mounted so as to be sandwiched in the sandwiching hole 48. The widths of the first flange 13 and the second flange 33 are set to be approximately the same as the interval between the inner side walls 49 that form the holding holes 48, and the first flange 13 and the second flange 33 are connected and fixed by the quick fastener 44. .

  As shown in FIG. 5, when the connection is made by the quick fastener 44, both side walls 47 that form the holding holes 48 of the quick fastener 44 are connected to the first annular groove 14 in which the reinforcing member 23 is fitted and the joint member 15. It is accommodated in the two annular grooves 34. At this time, one side piece 26 of the reinforcing member 23 is engaged with the inner bottom surface of the first annular groove 14 formed on the back side of the first flange 13 of the resin header 18, and the other surface is engaged with the back surface of the first flange 13. The side piece 27 is engaged. For this reason, the first flange 13 is reinforced, and the one side piece 26 of the reinforcing member 23 receives the force received from the inner wall 49 forming the holding hole 48 of the quick fastener 44 together with the first flange 13, and the other side piece 27 receives it. Can support.

The effects exhibited by the above embodiment will be described below.
In the embodiment, the reinforcing member 23 has an L-shaped cross section, one side piece 26 engages with the inner bottom surface of the first annular groove 14 of the header body 11 or the branch pipe 16, and the other side piece 27 has the header body. 11 or the rear surface of the first flange 13 of the branch pipe 16 is engaged. And while the other side piece 27 of the reinforcement member 23 receives the force added to the 1st flange 13 integrally with the 1st flange 13, the one side piece 26 can support it. For this reason, the connection part of the header main body 11 or the branch pipe 16 in the resin header 18 can be reinforced, and the connection strength of the connection part between the header main body 11 or the branch pipe 16 and the joint member 15 can be improved.

  In addition, since the reinforcing member 23 is formed in a substantially C shape having an opening, the reinforcing member 23 can be easily fitted into the first annular groove 14 of the header body 11 or the branch pipe 16 from the opening. Can do. For this reason, the reinforcing member 23 can be easily attached to the first annular groove 14 of the header body 11 or the branch pipe 16.

In addition, this embodiment can also be changed and embodied as follows.
7A, the reinforcing member 23 is formed in a U-shaped cross section, that is, the one side piece 26 and the other side piece 27 of the embodiment are further extended in parallel with the other side piece 27. 54 may be provided so as to be fitted into the first annular groove 14 of the header body 11 or the branch pipe 16. In this case, since the other side piece 54 can be engaged with the inner side surface forming the first annular groove 14, the connection portion of the header body 11 or the branch pipe 16 can be reinforced more strongly. Or the connection strength of the connection part of the branch pipe 16 and the coupling member 15 can be improved further.

  As shown in FIG. 7B, the reinforcing member 23 is formed so that the other side piece 27 has a substantially C shape similar to that of the embodiment, and a plurality of locations on the inner periphery thereof (four locations in this example) Further, the reinforcing piece 51 can be provided so as to protrude perpendicularly to the other side piece 27.

  -It is also possible to comprise the reinforcement member 23 only with the other side piece 27 of the said embodiment. In this case, the other side piece 27 can be bonded to the rear surface of the header 13 or the flange 13 of the branch pipe 16 with an adhesive.

  The reinforcing member 23 can be configured to be integrally formed at the same time as the header body 11 is formed by the insert molding method. Alternatively, when the reinforcing member 23 is fitted into the first annular groove 14 of the header body 11 or the branch pipe 16, it can be adhered and fixed using an adhesive.

The thickness of the other side piece 27 of the reinforcing member 23 can be made thicker than that of the one side piece 26 so that the reinforcing effect of the first flange 13 can be enhanced.
The branch pipe 16 is formed of a trifurcated cheese joint, the first flange 13 and the first annular groove 14 are formed in each joint, the reinforcing member 23 is fitted in each first annular groove 14, and the joint member 15 May be configured to be connected by a quick fastener 44.

-The opening end of the header main body 11 may be screwed with a screw for screwing a joint for piping.
One of the opening end portions of the header main body 11 may be sealed when the header main body 11 is molded.

Furthermore, the technical idea which can be grasped from the embodiment or another example will be described below.
The reinforcing structure in the connecting portion of the resin header according to any one of claims 1 to 3, wherein the reinforcing member is integrally formed by bending a plate material. When comprised in this way, a reinforcement member can be easily shape | molded as an integral thing.

  The reinforcing structure in the connecting portion of the resin header according to claim 1, wherein the reinforcing member is formed in a U-shaped cross section and is configured to be fitted into an annular groove of the header body or the branch pipe. When comprised in this way, the connection part of a header main body or a branch pipe can be reinforced more firmly, and the connection strength of the connection part of a header main body or a branch pipe and a coupling member can be improved further.

  A cylindrical header body and a branch pipe projecting from the side of the header body are formed of synthetic resin, and a flange projecting from an opening end of the header body or an opening of the branch pipe The reinforcing member made of metal is fitted into the annular groove formed on the back side so as to reinforce the header body or the flange of the branch pipe, and is used for the reinforcing structure in the connecting portion of the resin header according to claim 1. Resin header, characterized in that When comprised in this way, the connection part of the header main body in a resin-made header or a branch pipe can be reinforced.

The partially broken top view which shows the connection state of a header main body or a branch pipe, and a coupling member. The perspective view which shows a reinforcement member. The perspective view which shows the reinforcement raw material for forming a reinforcement member. The partial expanded sectional view which shows the state which attached the reinforcement member to the 1st flange. The partial expanded sectional view which shows the state which attached the connection member to the 1st flange and the 2nd flange. (A) is a perspective view which shows a quick fastener, (b) is the 6b-6b sectional view taken on the line of Fig.6 (a). (A) is sectional drawing which shows another example of a reinforcement member, (b) is a perspective view which shows another example of a reinforcement member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Header main body, 13 ... 1st flange, 14 ... 1st annular groove, 15 ... Joint member, 16 ... Branch pipe, 18 ... Resin header, 23 ... Reinforcement member, 25 ... Opening part, 26 ... One side piece, 27 ... Other side piece, 33 ... Second flange, 44 ... Quick fastener as a connecting member.

Claims (3)

A cylindrical header body and a branch pipe projecting from the side of the header body are formed of synthetic resin, and a flange projecting from the opening end of the header body or the opening of the branch pipe is made of metal. When connecting both flanges by connecting the flanges of the joint member made of the metal, a reinforcing member made of metal is formed in the annular groove formed on the back side of the flange of the header main body or the branch pipe. The connecting member is attached to the flange via the reinforcing member, and the flange projecting from the opening end of the header body or the opening of the branch pipe is the flange of the joint member. reinforcing structure at the connecting portion of the resin header, characterized in that it is configured to so that is formed thicker. The reinforcing member has an L-shaped cross section, and one side piece is engaged with the inner bottom surface of the annular groove, and the other side piece is engaged with the back surface of the header body or the flange of the branch pipe. The reinforcement structure in the connection part of the resin-made headers of Claim 1. The reinforcing structure in the connecting portion of the resin header according to claim 1 or 2, wherein the reinforcing member is formed in a substantially C shape having an opening.

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