JP6938243B2

JP6938243B2 - Piping connection structure

Info

Publication number: JP6938243B2
Application number: JP2017124619A
Authority: JP
Inventors: 琢也天野; 得徳柳
Original assignee: Nok Corp
Current assignee: Nok Corp
Priority date: 2017-06-26
Filing date: 2017-06-26
Publication date: 2021-09-22
Anticipated expiration: 2037-06-26
Also published as: JP2019007568A

Description

本発明は、車両のインテークマニホールド、インタークーラやターボユニット等において互いに離間して配置される２つの配管流路を接続する配管接続構造に関し、詳しくは、例えば径の異なる２つの配管流路間の芯ずれを吸収して接続することができ、構成部品点数が削減され、また、製造及び組み付け作業が容易化された配管接続構造に関する。 The present invention relates to a pipe connection structure for connecting two pipe flow paths arranged apart from each other in a vehicle intake manifold, an intercooler, a turbo unit, etc., and more specifically, for example, between two pipe flow paths having different diameters. The present invention relates to a pipe connection structure capable of absorbing misalignment and connecting, reducing the number of component parts, and facilitating manufacturing and assembling work.

自動車関連の分野（インテークマニホールド、インタークーラやターボユニット等）や、その他の汎用機械の分野などにおいて、互いに離間して配置される２つの配管流路間の芯ずれを吸収して接続する配管接続構造としては、従来、図９に示すように、ゴムホース６０と金属バンド６３，６６とを組み合わせたものがある。 In the fields of automobiles (intake manifolds, intercoolers, turbo units, etc.) and other general-purpose machinery fields, pipe connections that absorb and connect the misalignment between two pipe flow paths that are arranged apart from each other. Conventionally, as a structure, as shown in FIG. 9, there is a combination of a rubber hose 60 and metal bands 63 and 66.

ゴムホース６０の一端側６１（図中下方）には、一方の配管流路６２を差し込み、外周面を金属バンド６３によって締め付ける。ゴムホース６０の他端側６４（図中上方）には、他方の配管流路６５を差し込み、外周面を金属バンド６６によって締め付ける。 One of the piping flow paths 62 is inserted into one end side 61 (lower part in the drawing) of the rubber hose 60, and the outer peripheral surface is tightened by the metal band 63. The other piping flow path 65 is inserted into the other end side 64 (upper part in the drawing) of the rubber hose 60, and the outer peripheral surface is tightened by the metal band 66.

この配管接続構造においては、分離された構成部品（ゴムホース６０及び２個の金属バンド６３，６６）の点数が多いために取扱いが煩雑であるとともに、組み付け作業が煩雑である。また、金属バンド６３，６６は高価である。 In this pipe connection structure, since the number of separated components (rubber hose 60 and two metal bands 63, 66) is large, the handling is complicated and the assembly work is complicated. Further, the metal bands 63 and 66 are expensive.

金属バンドを用いずに、２つの配管流路間の芯ずれを吸収して接続する配管接続構造としては、図１０に示すように、金属管７０の両端部近傍の外周面に、ゴム状弾性材料からなるシールリップ７１，７２を設けたものがある（特許文献１、２）。金属管７０の両端側は、一方及び他方の配管流路７３，７４に差し込まれて、これら配管流路７３，７４を接続させる。シールリップ７１，７２は、配管流路７３，７４の内周面に押接して、これら配管流路７３，７４と金属管７０との間をシールする。 As a pipe connection structure that absorbs and connects the misalignment between the two pipe flow paths without using a metal band, as shown in FIG. 10, rubber-like elasticity is provided on the outer peripheral surface near both ends of the metal pipe 70. Some are provided with seal lips 71 and 72 made of a material (Patent Documents 1 and 2). Both ends of the metal pipe 70 are inserted into one and the other pipe flow paths 73 and 74 to connect these pipe flow paths 73 and 74. The seal lips 71 and 72 are pressed against the inner peripheral surfaces of the pipe flow paths 73 and 74 to seal between the pipe flow paths 73 and 74 and the metal pipe 70.

この配管接続構造において、一方及び他方の配管流路７３，７４間の芯ずれを吸収するためには、金属管７０が配管流路７３，７４の軸に対して傾斜する。そのため、シールリップ７１，７２も配管流路７３，７４の軸に対して傾斜することになり、大きな芯ずれを吸収することは困難である。 In this pipe connection structure, the metal pipe 70 is inclined with respect to the axis of the pipe flow paths 73 and 74 in order to absorb the misalignment between the one and the other pipe flow paths 73 and 74. Therefore, the seal lips 71 and 72 are also inclined with respect to the axes of the piping flow paths 73 and 74, and it is difficult to absorb a large misalignment.

金属バンドを用いず、また、２つの配管流路間の大きな芯ずれを吸収して接続する配管接続構造としては、図１１に示すように、ゴム状弾性材料からなる筒状部材８０を有するものが提案されている（特許文献３）。筒状部材８０は、一端側８１（図中下方）に一方の配管流路８２が差し込まれ、他端側８３（図中上方）に他方の配管流路８４が差し込まれる。 As a pipe connection structure that does not use a metal band and absorbs and connects a large misalignment between two pipe flow paths, it has a tubular member 80 made of a rubber-like elastic material as shown in FIG. Has been proposed (Patent Document 3). In the tubular member 80, one pipe flow path 82 is inserted into one end side 81 (lower in the figure), and the other pipe flow path 84 is inserted into the other end side 83 (upper in the figure).

筒状部材８０の一端側８１には、金属等の硬質材料からなる埋設環状部材８５が埋設されている。また、筒状部材８０の一端側８１は、内周面に複数の内周リブ８６が形成され、外周面に複数の外周リブ８７が形成されている。 An embedded annular member 85 made of a hard material such as metal is embedded in one end side 81 of the tubular member 80. Further, on one end side 81 of the tubular member 80, a plurality of inner peripheral ribs 86 are formed on the inner peripheral surface, and a plurality of outer peripheral ribs 87 are formed on the outer peripheral surface.

また、筒状部材８０の他端側８３の外周面には、金属等の硬質材料からなる外周環状部材８８が設けられている。筒状部材８０の他端側８３の内周面には、複数の内周リブ８９が形成されている。 Further, an outer peripheral annular member 88 made of a hard material such as metal is provided on the outer peripheral surface of the other end side 83 of the tubular member 80. A plurality of inner peripheral ribs 89 are formed on the inner peripheral surface of the other end side 83 of the tubular member 80.

この配管接続構造においては、一端側８１の内周リブ８６が、一方の配管流路８２の開口端近傍に設けられた環状溝９０に嵌入する。また、他端側８３の内周リブ８９が、他方の配管流路８４の開口端近傍に設けられた環状溝９１に嵌入する。 In this pipe connection structure, the inner peripheral rib 86 on one end side 81 is fitted into the annular groove 90 provided near the open end of one pipe flow path 82. Further, the inner peripheral rib 89 of the other end side 83 is fitted into the annular groove 91 provided near the opening end of the other piping flow path 84.

さらに、一端側８１の外周リブ８７は、基材９２の開口部９３内に設けられた環状溝９４に嵌入する。 Further, the outer peripheral rib 87 on the one end side 81 is fitted into the annular groove 94 provided in the opening 93 of the base material 92.

このようにして、筒状部材８０は、配管流路８２，８４間の芯ずれを吸収して密封した状態で接続させる。 In this way, the tubular member 80 is connected in a sealed state by absorbing the misalignment between the piping flow paths 82 and 84.

特開２０１２−２５５４７０号公報Japanese Unexamined Patent Publication No. 2012-255470 特開２０１３−０７９６９６号公報Japanese Unexamined Patent Publication No. 2013-079696 特開２０１５−２２７７０１号公報Japanese Unexamined Patent Publication No. 2015-227701

ところで、前述のような筒状部材８０を用いた配管接続構造においては、両端側８１，８３のそれぞれに複数の内周リブ８６，８９を形成しなければならず、この筒状部材８０の形状が複雑であり、製造が煩雑である。この筒状部材８０を射出成形によって製造するには、少なくとも３つに分割される金型を用いる必要がある。 By the way, in the pipe connection structure using the tubular member 80 as described above, a plurality of inner peripheral ribs 86 and 89 must be formed on each of both end sides 81 and 83, and the shape of the tubular member 80 Is complicated and manufacturing is complicated. In order to manufacture the tubular member 80 by injection molding, it is necessary to use a mold divided into at least three parts.

さらに、この配管接続構造においては、一端側８１の複数の内周リブ８６のそれぞれを環状溝９０に嵌入させるとともに、他端側８３の複数の内周リブ８９のそれぞれを環状溝９１に嵌入させなければならず、組み付け作業が煩雑である。 Further, in this pipe connection structure, each of the plurality of inner peripheral ribs 86 on the one end side 81 is fitted into the annular groove 90, and each of the plurality of inner peripheral ribs 89 on the other end side 83 is fitted into the annular groove 91. Assembling work is complicated.

そこで、本発明の課題は、例えば径の異なる２つの配管流路間の芯ずれを吸収して接続することができ、構成部品点数が削減され、また、製造及び組み付け作業が容易化された配管接続構造を提供することにある。 Therefore, the subject of the present invention is, for example, a pipe that can absorb and connect the misalignment between two pipe flow paths having different diameters, reduce the number of component parts, and facilitate the manufacturing and assembling work. To provide a connection structure.

本発明の他の課題は、以下の記載によって明らかとなる。 Other problems of the present invention will be clarified by the following description.

上記課題は、以下の各発明によって解決される。 The above problems are solved by the following inventions.

１．
一方の配管流路（４）と他方の配管流路（５）とからなる２つの配管流路間をゴム状弾性材料からなる筒状部材（１）により接続する配管接続構造であって、
前記筒状部材（１）の一端側に配置され、該筒状部材（１）の一端側（１１）と前記一方の配管流路（４）の開口端近傍とを接続させる一端側シール部（２）と、
前記筒状部材（１）の他端側に配置され、該筒状部材（１）の他端側（１２）と前記他方の配管流路（５）の開口端近傍とを接続させる他端側シール部（３）とを備え、
該筒状部材（１）の一端側（１１）は、前記一方の配管流路（４）の開口端近傍（４１）に差し込まれると共に、他端側（１２）には、前記他方の配管流路（５）の開口端近傍（５１）が差し込まれ、
前記筒状部材（１）の一端側（１１）の外周面には、前記一端側シール部（２）が設けられ、該一端側シール部（２）は、前記筒状部材（１）の一端側（１１）に埋設された硬質の埋設環状部材（２１）と、前記一端側（１１）の外周面に膨出形成されたリップ部（２２）とからなり、
前記筒状部材（１）の他端側（１２）の内周面には、前記他端側シール部（３）が設けられ、該他端側シール部（３）は、前記筒状部材（１）の他端側（１２）の内周面に配置された硬質の内周環状部材（３１）と、該内周環状部材（３１）の内周面に配置されたＯリング（３２）とからなり、
前記一端側シール部（２）の前記リップ部（２２）が、前記一方の配管流路（４）の開口端近傍の内周面に押接され、前記他端側シール部（３）の前記Ｏリング（３２）が、前記他方の配管流路（５）の開口端近傍の外周面に押接される構造であることを特徴とする配管接続構造。
２．
前記他方の配管流路（５）の開口端近傍に外方に向けて突出形成された係合爪（５２）を有し、
前記係合爪（５２）は、前記筒状部材（１）の他端側（１２）に設けられた前記他端側シール部（３）の前記内周環状部材（３１）に係合することを特徴とする請求項１記載の配管接続構造。
３．
一方の配管流路（４）と他方の配管流路（５）とからなる２つの配管流路間をゴム状弾性材料からなる筒状部材（１）により接続する配管接続構造であって、
前記筒状部材（１）の一端側に配置され、該筒状部材（１）の一端側（１１）と前記一方の配管流路（４）の開口端近傍とを接続させる一端側シール部（２）と、
前記筒状部材（１）の他端側に配置され、該筒状部材（１）の他端側（１２）と前記他方の配管流路（５）の開口端近傍とを接続させる他端側シール部（３）とを備え、
該筒状部材（１）の一端側（１１）は、前記一方の配管流路（４）の開口端近傍（４１）が差し込まれると共に、他端側（１２）には、前記他方の配管流路（５）の開口端近傍（５１）が差し込まれ、
前記筒状部材（１）の一端側（１１）の外周面には、前記一端側シール部（２）が設けられ、該一端側シール部（２）は、前記筒状部材（１）の一端側（１１）の外周面に配置された硬質の外周環状部材（２３）と、該外周環状部材（２３）の外周面に埋設されたＯリング（２４）とからなり、
前記筒状部材（１）の他端側（１２）の内周面には、前記他端側シール部（３）が設けられ、該他端側シール部（３）は、前記筒状部材（１）の他端側（１２）の内周面に配置された硬質の内周環状部材（３１）と、該内周環状部材（３１）の内周面に配置されたＯリング（３２）とからなり、
前記一端側シール部（２）のＯリング（２４）が、前記一方の配管流路（４）の開口端近傍の内周面に押接され、前記他端側シール部（３）の前記Ｏリング（３２）が、前記他方の配管流路（５）の開口端近傍の外周面に押接される構造であることを特徴とする配管接続構造。
４．
一方の配管流路（４）と他方の配管流路（５）とからなる２つの配管流路間をゴム状弾性材料からなる筒状部材（１）により接続する配管接続構造であって、
前記筒状部材（１）の一端側に配置され、該筒状部材（１）の一端側（１１）と前記一方の配管流路（４）の開口端近傍とを接続させる一端側シール部（２）と、
前記筒状部材（１）の他端側に配置され、該筒状部材（１）の他端側（１２）と前記他方の配管流路（５）の開口端近傍とを接続させる他端側シール部（３）とを備え、
該筒状部材（１）の一端側（１１）は、前記一方の配管流路（４）の開口端近傍（４１）に差し込まれると共に、他端側（１２）には、前記他方の配管流路（５）の開口端近傍（５１）が差し込まれ、
前記筒状部材（１）の一端側（１１）の外周面には、前記一端側シール部（２）が設けられ、該一端側シール部（２）は、前記筒状部材（１）の一端側（１１）に埋設された硬質の埋設環状部材（２１）と、前記一端側（１１）の外周面に膨出形成されたリップ部（２２）とからなり、
前記筒状部材（１）の他端側（１２）の内周面には、前記他端側シール部（３）が設けられ、該他端側シール部（３）は、前記筒状部材（１）の他端側（１２）に埋設された硬質の埋設環状部材（３５）と、前記他端側（１２）の内周面に膨出形成されたリップ部（３６）とからなり、
前記一端側シール部（２）の前記リップ部（２２）が、前記一方の配管流路（４）の開口端近傍の内周面に押接され、前記他端側シール部（３）の前記リップ部（３５）が、前記他方の配管流路（５）の開口端近傍の外周面に押接される構造であることを特徴とする配管接続構造。
５．
一方の配管流路（４）と他方の配管流路（５）とからなる２つの配管流路間をゴム状弾性材料からなる筒状部材（１）により接続する配管接続構造であって、
前記筒状部材（１）の一端側に配置され、該筒状部材（１）の一端側（１１）と前記一方の配管流路（４）の開口端近傍とを接続させる一端側シール部（２）と、
前記筒状部材（１）の他端側に配置され、該筒状部材（１）の他端側（１２）と前記他方の配管流路（５）の開口端近傍とを接続させる他端側シール部（３）とを備え、
該筒状部材（１）の一端側（１１）は、前記一方の配管流路（４）の開口端近傍（４１）に差し込まれると共に、他端側（１２）には、前記他方の配管流路（５）の開口端近傍（５１）が差し込まれ、
前記筒状部材（１）の一端側（１１）の外周面には、前記一端側シール部（２）が設けられ、該一端側シール部（２）は、前記筒状部材（１）の一端側（１１）の外周面に配置された硬質の外周環状部材（２３）と、該外周環状部材（２３）の外周面に埋設されたＯリング（２４）とからなり、
前記筒状部材（１）の他端側（１２）の内周面には、前記他端側シール部（３）が設けられ、該他端側シール部（３）は、前記筒状部材（１）の他端側（１２）に埋設された硬質の埋設環状部材（３５）と、前記他端側（１２）の内周面に膨出形成されたリップ部（３６）とからなり、
前記一端側シール部（２）の前記Ｏリング（２４）が、前記一方の配管流路（４）の開口端近傍の内周面に押接され、前記他端側シール部（３）の前記リップ部（３６）が、前記他方の配管流路（５）の開口端近傍の外周面に押接される構造であることを特徴とする配管接続構造。 1. 1.
A pipe connection structure in which two pipe flow paths consisting of one pipe flow path (4) and the other pipe flow path (5) are connected by a tubular member (1) made of a rubber-like elastic material.
One end side seal portion (1 end side seal portion) arranged on one end side of the tubular member (1) and connecting one end side (11) of the tubular member (1) and the vicinity of the open end of the one piping flow path (4). 2) and
The other end side that is arranged on the other end side of the tubular member (1) and connects the other end side (12) of the tubular member (1) and the vicinity of the open end of the other piping flow path (5). Equipped with a seal part (3)
One end side (11) of the tubular member (1) is inserted into the vicinity (41) of the opening end of the one pipe flow path (4), and the other pipe flow is connected to the other end side (12). The vicinity of the open end (51) of the road (5) is inserted,
The one end side seal portion (2) is provided on the outer peripheral surface of the one end side (11) of the tubular member (1), and the one end side seal portion (2) is one end of the tubular member (1). It is composed of a hard buried annular member (21) embedded in the side (11) and a lip portion (22) bulging formed on the outer peripheral surface of the one end side (11).
The other end side seal portion (3) is provided on the inner peripheral surface of the other end side (12) of the tubular member (1), and the other end side seal portion (3) is the tubular member (3). A hard inner annular member (31) arranged on the inner peripheral surface of the other end side (12) of 1) and an O-ring (32) arranged on the inner peripheral surface of the inner annular member (31). Consists of
The lip portion (22) of the one end side seal portion (2) is pressed against the inner peripheral surface near the open end of the one piping flow path (4), and the other end side seal portion (3) is said. A pipe connection structure characterized in that the O-ring (32) is pressed against an outer peripheral surface near the opening end of the other pipe flow path (5).
2.
It has an engaging claw (52) formed so as to project outward in the vicinity of the open end of the other piping flow path (5).
The engaging claw (52) engages with the inner peripheral annular member (31) of the other end side seal portion (3) provided on the other end side (12) of the tubular member (1). The pipe connection structure according to claim 1.
3. 3.
A pipe connection structure in which two pipe flow paths consisting of one pipe flow path (4) and the other pipe flow path (5) are connected by a tubular member (1) made of a rubber-like elastic material.
One end side seal portion (1 end side seal portion) arranged on one end side of the tubular member (1) and connecting one end side (11) of the tubular member (1) and the vicinity of the open end of the one piping flow path (4). 2) and
The other end side that is arranged on the other end side of the tubular member (1) and connects the other end side (12) of the tubular member (1) and the vicinity of the open end of the other piping flow path (5). Equipped with a seal part (3)
One end side (11) of the tubular member (1) is inserted near the open end (41) of the one pipe flow path (4), and the other pipe flow is inserted into the other end side (12). The vicinity of the open end (51) of the road (5) is inserted,
The one end side seal portion (2) is provided on the outer peripheral surface of the one end side (11) of the tubular member (1), and the one end side seal portion (2) is one end of the tubular member (1). It is composed of a hard outer peripheral annular member (23) arranged on the outer peripheral surface of the side (11) and an O-ring (24) embedded in the outer peripheral surface of the outer peripheral annular member (23).
The other end side seal portion (3) is provided on the inner peripheral surface of the other end side (12) of the tubular member (1), and the other end side seal portion (3) is the tubular member (3). A hard inner annular member (31) arranged on the inner peripheral surface of the other end side (12) of 1) and an O-ring (32) arranged on the inner peripheral surface of the inner annular member (31). Consists of
The O-ring (24) of the one end side seal portion (2) is pressed against the inner peripheral surface near the opening end of the one piping flow path (4), and the O ring (24) of the other end side seal portion (3) is pressed against the inner peripheral surface. A pipe connection structure characterized in that the ring (32) is pressed against an outer peripheral surface near the opening end of the other pipe flow path (5).
4.
A pipe connection structure in which two pipe flow paths consisting of one pipe flow path (4) and the other pipe flow path (5) are connected by a tubular member (1) made of a rubber-like elastic material.
One end side seal portion (1 end side seal portion) arranged on one end side of the tubular member (1) and connecting one end side (11) of the tubular member (1) and the vicinity of the open end of the one piping flow path (4). 2) and
The other end side that is arranged on the other end side of the tubular member (1) and connects the other end side (12) of the tubular member (1) and the vicinity of the open end of the other piping flow path (5). Equipped with a seal part (3)
One end side (11) of the tubular member (1) is inserted into the vicinity (41) of the opening end of the one pipe flow path (4), and the other pipe flow is connected to the other end side (12). The vicinity of the open end (51) of the road (5) is inserted,
The one end side seal portion (2) is provided on the outer peripheral surface of the one end side (11) of the tubular member (1), and the one end side seal portion (2) is one end of the tubular member (1). It is composed of a hard buried annular member (21) embedded in the side (11) and a lip portion (22) bulging formed on the outer peripheral surface of the one end side (11).
The other end side seal portion (3) is provided on the inner peripheral surface of the other end side (12) of the tubular member (1), and the other end side seal portion (3) is the tubular member (3). It is composed of a hard embedded annular member (35) embedded in the other end side (12) of 1) and a lip portion (36) bulging formed on the inner peripheral surface of the other end side (12).
The lip portion (22) of the one end side seal portion (2) is pressed against the inner peripheral surface near the open end of the one piping flow path (4), and the other end side seal portion (3) is said. A pipe connection structure characterized in that the lip portion (35) is pressed against an outer peripheral surface near the opening end of the other pipe flow path (5).
5.
A pipe connection structure in which two pipe flow paths consisting of one pipe flow path (4) and the other pipe flow path (5) are connected by a tubular member (1) made of a rubber-like elastic material.
One end side seal portion (1 end side seal portion) arranged on one end side of the tubular member (1) and connecting one end side (11) of the tubular member (1) and the vicinity of the open end of the one piping flow path (4). 2) and
The other end side that is arranged on the other end side of the tubular member (1) and connects the other end side (12) of the tubular member (1) and the vicinity of the open end of the other piping flow path (5). Equipped with a seal part (3)
One end side (11) of the tubular member (1) is inserted into the vicinity (41) of the opening end of the one pipe flow path (4), and the other pipe flow is connected to the other end side (12). The vicinity of the open end (51) of the road (5) is inserted,
The one end side seal portion (2) is provided on the outer peripheral surface of the one end side (11) of the tubular member (1), and the one end side seal portion (2) is one end of the tubular member (1). It is composed of a hard outer peripheral annular member (23) arranged on the outer peripheral surface of the side (11) and an O-ring (24) embedded in the outer peripheral surface of the outer peripheral annular member (23).
The other end side seal portion (3) is provided on the inner peripheral surface of the other end side (12) of the tubular member (1), and the other end side seal portion (3) is the tubular member (3). It is composed of a hard embedded annular member (35) embedded in the other end side (12) of 1) and a lip portion (36) bulging formed on the inner peripheral surface of the other end side (12).
The O-ring (24) of the one end side seal portion (2) is pressed against the inner peripheral surface near the opening end of the one piping flow path (4), and the other end side seal portion (3) is said to be said. A pipe connection structure characterized in that the lip portion (36) is pressed against an outer peripheral surface near the opening end of the other pipe flow path (5).

本発明によれば、例えば径の異なる２つの配管流路間の芯ずれを吸収して接続することができ、構成部品点数が削減され、また、製造及び組み付け作業が容易化された配管接続構造を提供することができる。 According to the present invention, for example, a pipe connection structure capable of absorbing and connecting two pipe flow paths having different diameters, reducing the number of component parts, and facilitating manufacturing and assembling work. Can be provided.

本発明の第１の実施形態に係る配管接続構造の断面図Sectional drawing of the pipe connection structure which concerns on 1st Embodiment of this invention 本発明の第２の実施形態に係る配管接続構造の断面図Sectional drawing of the pipe connection structure which concerns on 2nd Embodiment of this invention 本発明の第２の実施形態に係る配管接続構造の要部断面図Cross-sectional view of a main part of the pipe connection structure according to the second embodiment of the present invention. 本発明の変形例の要部断面図Cross-sectional view of a main part of a modified example of the present invention 本発明の変形例の要部断面図Cross-sectional view of a main part of a modified example of the present invention 本発明の変形例の要部断面図Cross-sectional view of a main part of a modified example of the present invention 本発明の変形例の要部断面図Cross-sectional view of a main part of a modified example of the present invention 本発明の変形例における変形状態を示す図The figure which shows the deformation state in the modification of this invention 従来の配管接続構造の断面図Cross-sectional view of the conventional pipe connection structure 従来の配管接続構造の他の例の断面図Sectional view of another example of a conventional pipe connection structure 従来の配管接続構造のさらに他の例の断面図Sectional view of yet another example of a conventional pipe connection structure

以下、本発明の実施の形態について、図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

〔第１の実施形態〕
図１は、本発明の第１の実施形態に係る配管接続構造の断面図である。 [First Embodiment]
FIG. 1 is a cross-sectional view of a pipe connection structure according to a first embodiment of the present invention.

本発明の実施形態に係る配管接続構造は、図１に示すように、自動車関連の分野（インテークマニホールド、インタークーラやターボユニット等）や、その他の汎用機械の分野などにおいて、互いに離間して配置される２つの配管流路４，５間の芯ずれを吸収して接続する配管接続構造である。配管流路４，５は、合成樹脂材料や金属材料から円筒状に形成されている。 As shown in FIG. 1, the pipe connection structures according to the embodiment of the present invention are arranged apart from each other in automobile-related fields (intake manifold, intercooler, turbo unit, etc.) and other general-purpose machine fields. It is a pipe connection structure that absorbs and connects the misalignment between the two pipe flow paths 4 and 5. The piping flow paths 4 and 5 are formed in a cylindrical shape from a synthetic resin material or a metal material.

この配管接続構造においては、２つの配管流路４，５間を接続する筒状部材１を用いる。この筒状部材１は、ゴム状弾性材料によって筒状に成形されている。筒状部材１は、一端側１１（図中下方）が大径となされ、他端側１２（図中上方）が小径となされ、これら一端側１１及び他端側１２が漏斗状のベロー部を介して一体的に連設されている。 In this pipe connection structure, a cylindrical member 1 that connects two pipe flow paths 4 and 5 is used. The tubular member 1 is formed into a cylindrical shape by a rubber-like elastic material. The tubular member 1 has a large diameter at one end side 11 (lower part in the figure) and a small diameter at the other end side 12 (upper part in the figure), and these one end side 11 and the other end side 12 have a funnel-shaped bellows portion. It is integrally connected via.

筒状部材１は、一端側１１が一方の配管流路４の開口端近傍４１に差し込まれるとともに、他端側１２に他方の配管流路５の開口端近傍５１が差し込まれる。 In the tubular member 1, one end side 11 is inserted into the vicinity 41 of the opening end of one piping flow path 4, and the other end side 12 is inserted near the opening end 51 of the other piping flow path 5.

この実施形態においては、接続する配管流路４，５の径に応じて、一端側１１が他端側１２よりも大径に形成されている。しかし、一端側１１及び他端側１２は、接続する配管流路４，５の径が同一であれば、これら配管流路４，５の径に応じて、同一の径に形成されてもよい。 In this embodiment, the one end side 11 is formed to have a larger diameter than the other end side 12 according to the diameters of the pipe flow paths 4 and 5 to be connected. However, the one end side 11 and the other end side 12 may be formed to have the same diameter according to the diameters of the pipe flow paths 4 and 5 as long as the diameters of the pipe flow paths 4 and 5 to be connected are the same. ..

また、一端側１１及び他端側１２は、連結する配管流路４，５の位置に応じて、同軸に形成されてもよいし、異なる軸を有して形成されてもよい。一端側１１及び他端側１２が同軸に形成されている場合において、配管流路４，５間に芯ずれや傾きがあっても、筒状部材１のベロー部が弾性変形することにより、一端側１１の一方の配管流路４への差し込み及び他端側１２への他方の配管流路５の差し込みが可能である。このとき、筒状部材１の一端側１１は、一方の配管流路４の軸に対して傾斜することがなく、他端側１２は、他方の配管流路５の軸に対して傾斜することがない。 Further, the one end side 11 and the other end side 12 may be formed coaxially or have different axes depending on the positions of the pipe flow paths 4 and 5 to be connected. When the one end side 11 and the other end side 12 are formed coaxially, even if there is a misalignment or inclination between the piping flow paths 4 and 5, the bellows portion of the tubular member 1 is elastically deformed, so that one end is formed. It is possible to insert the other pipe flow path 5 into one pipe flow path 4 on the side 11 and the other pipe flow path 5 into the other end side 12. At this time, the one end side 11 of the tubular member 1 is not inclined with respect to the axis of one piping flow path 4, and the other end side 12 is inclined with respect to the axis of the other piping flow path 5. There is no.

筒状部材１の一端側１１の外周面には、一端側シール部２が設けられている。一端側シール部２は、筒状部材１の一端側１１に埋設された硬質の埋設環状部材２１と、一端側１１の外周面に膨出形成された円環状シール部材であるリップ部２２とからなる。 One end side seal portion 2 is provided on the outer peripheral surface of the one end side 11 of the tubular member 1. The one-end side seal portion 2 is composed of a hard embedded annular member 21 embedded in one end side 11 of the tubular member 1 and a lip portion 22 which is an annular seal member bulging and formed on the outer peripheral surface of the one end side 11. Become.

埋設環状部材２１は、金属や硬質の合成樹脂材料から円筒状に形成され、筒状部材１の一端側１１に埋設されている。この埋設環状部材２１は、筒状部材１が射出成形等により形成されるときに、いわゆるインサート成形によって筒状部材１内に埋設されることができる。 The embedded annular member 21 is formed in a cylindrical shape from a metal or a hard synthetic resin material, and is embedded in one end side 11 of the tubular member 1. The embedded annular member 21 can be embedded in the tubular member 1 by so-called insert molding when the tubular member 1 is formed by injection molding or the like.

リップ部２２は、筒状部材１に一体として筒状部材１とともに形成された膨出（突条）部であり、埋設環状部材２１の外周側となる位置に、円環状をなして形成されている。このリップ部２２の先端部（最外周部）は、平坦な円筒面となっている。リップ部２２の外径は、一方の配管流路４の開口端近傍４１の内径よりもやや大径となっている。リップ部２２は、一方の配管流路４の開口端近傍４１内に差し込まれたとき、開口端近傍４１の内周面４１ａに押圧されて弾性変形し、開口端近傍４１の内径に倣わされる。このときの弾性変形量が絞め代となる。 The lip portion 22 is a bulging (protruding) portion formed integrally with the tubular member 1 together with the tubular member 1, and is formed in an annular shape at a position on the outer peripheral side of the embedded annular member 21. There is. The tip portion (outermost peripheral portion) of the lip portion 22 has a flat cylindrical surface. The outer diameter of the lip portion 22 is slightly larger than the inner diameter of 41 near the opening end of one of the piping flow paths 4. When the lip portion 22 is inserted into the opening end vicinity 41 of one of the piping flow paths 4, it is pressed against the inner peripheral surface 41a of the opening end vicinity 41 and elastically deformed, and is imitated by the inner diameter of the opening end vicinity 41. NS. The amount of elastic deformation at this time serves as the throttle allowance.

なお、一方の配管流路４の開口端近傍４１には、筒状部材１の一端側１１の差し込みが想定される長さだけ先端部から差し込み方向前方側に、内周フランジ４１ｂが設けられている。この内周フランジ４１ｂは、一方の配管流路４に筒状部材１が十分に差し込まれたときに、筒状部材１の一端部に当接し、筒状部材１がそれ以上差し込まれないようにして、筒状部材１の位置決めを行う。 In addition, in the vicinity of the opening end 41 of one of the piping flow paths 4, an inner peripheral flange 41b is provided on the front side in the insertion direction from the tip portion by the length that the one end side 11 of the tubular member 1 is expected to be inserted. There is. When the tubular member 1 is sufficiently inserted into one of the piping flow paths 4, the inner peripheral flange 41b comes into contact with one end of the tubular member 1 to prevent the tubular member 1 from being further inserted. The cylindrical member 1 is positioned.

筒状部材１の他端側１２の内周面には、他端側シール部３が設けられている。他端側シール部３は、筒状部材１の他端側１２の内周面に配置された硬質の内周環状部材３１と、内周環状部材３１の内周面に配置された円環状シール部材であるＯリング３２とからなる。 The other end side seal portion 3 is provided on the inner peripheral surface of the other end side 12 of the tubular member 1. The other end side seal portion 3 is a hard inner peripheral annular member 31 arranged on the inner peripheral surface of the other end side 12 of the tubular member 1 and an annular seal arranged on the inner peripheral surface of the inner peripheral annular member 31. It is composed of an O-ring 32 which is a member.

内周環状部材３１は、金属や硬質の合成樹脂材料から円筒状に形成されている。この内周環状部材３１は、外周面が、筒状部材１の他端側１２の内周面に接合されている。この内周環状部材３１は、筒状部材１に対して、焼き付け接合され、又は接着されている。 The inner peripheral annular member 31 is formed in a cylindrical shape from a metal or a hard synthetic resin material. The outer peripheral surface of the inner peripheral annular member 31 is joined to the inner peripheral surface of the other end side 12 of the tubular member 1. The inner peripheral annular member 31 is baked and joined or adhered to the tubular member 1.

Ｏリング３２は、ゴム状弾性材料により断面円形の円環状（ドーナツ形状）に形成された一般的なものである。このＯリング３２は、他方の配管流路５の開口端近傍５１の外周面５１ａに形成された環状溝３３内に配置されている。環状溝３３は、開口端近傍５１の外周面５１ａに全周に亘って形成されている。なお、Ｏリング３２は、環状溝３３を設けずに、開口端近傍５１の外周面５１ａ上に配置してもよい。 The O-ring 32 is a general one formed of a rubber-like elastic material into an annular shape (doughnut shape) having a circular cross section. The O-ring 32 is arranged in the annular groove 33 formed on the outer peripheral surface 51a of the vicinity of the opening end 51 of the other piping flow path 5. The annular groove 33 is formed on the outer peripheral surface 51a in the vicinity of the opening end 51 over the entire circumference. The O-ring 32 may be arranged on the outer peripheral surface 51a near the opening end 51 without providing the annular groove 33.

Ｏリング３２の初期状態における内径は、他方の配管流路５の開口端近傍５１の外径（この実施形態においては環状溝３３の底面の外径）よりも小径となっている。環状溝３３内に配置されたＯリング３２は、初期状態よりも弾性的に伸ばされた状態となっており、環状溝３３の底面に圧着する。環状溝３３内に配置されたＯリング３２の外径は、内周環状部材３１の内周面３１ａの内径よりもやや大径となっている。環状溝３３内のＯリング３２は、他方の配管流路５の開口端近傍５１が内周環状部材３１内に差し込まれたとき、内周環状部材３１の内周面３１ａに押圧されて弾性変形し、内周環状部材３１の内径に倣わされる。このときの弾性変形量が絞め代となる。 The inner diameter of the O-ring 32 in the initial state is smaller than the outer diameter of 51 near the opening end of the other piping flow path 5 (in this embodiment, the outer diameter of the bottom surface of the annular groove 33). The O-ring 32 arranged in the annular groove 33 is in a state of being elastically stretched from the initial state, and is crimped to the bottom surface of the annular groove 33. The outer diameter of the O-ring 32 arranged in the annular groove 33 is slightly larger than the inner diameter of the inner peripheral surface 31a of the inner peripheral annular member 31. The O-ring 32 in the annular groove 33 is elastically deformed by being pressed against the inner peripheral surface 31a of the inner peripheral annular member 31 when the vicinity 51 near the opening end of the other piping flow path 5 is inserted into the inner peripheral annular member 31. Then, it is imitated by the inner diameter of the inner peripheral annular member 31. The amount of elastic deformation at this time serves as the throttle allowance.

他方の配管流路５の開口端近傍５１には、筒状部材１の他端側１２への差し込みが想定される長さだけ先端部から差し込み方向後方側に、外周フランジ５１ｂが設けられている。この外周フランジ５１ｂは、他方の配管流路５が筒状部材１に十分に差し込まれたときに、筒状部材１の他端部に当接し、他方の配管流路５がそれ以上差し込まれないようにして、他方の配管流路５の位置決めを行う。 In the vicinity of the opening end 51 of the other piping flow path 5, an outer peripheral flange 51b is provided on the rear side in the insertion direction from the tip portion by a length that is expected to be inserted into the other end side 12 of the tubular member 1. .. The outer peripheral flange 51b comes into contact with the other end of the tubular member 1 when the other piping flow path 5 is sufficiently inserted into the tubular member 1, and the other piping flow path 5 is not inserted any further. In this way, the other piping flow path 5 is positioned.

なお、この配管接続構造においては、他方の配管流路５の筒状部材１への差し込み量を長くすることにより、他方の配管流路５の筒状部材１からの抜け止めを図ることができる。 In this pipe connection structure, by increasing the amount of insertion of the other pipe flow path 5 into the tubular member 1, it is possible to prevent the other pipe flow path 5 from coming off from the tubular member 1. ..

この配管接続構造においては、筒状部材１の一端側１１が一方の配管流路４の開口端近傍４１内に差し込まれると、一端側シール部２のリップ部２２が、開口端近傍４１の内周面４１ａに押接されてシールする。また、筒状部材１の他端側１２に他方の配管流路５の開口端近傍５１が差し込まれると、他端側シール部３のＯリング３２が、他方の配管流路５の開口端近傍５１の外周面５１ａ（この実施形態においては環状溝３３の底部）及び内周環状部材３１の内周面３１ａに押接されてシールする。このようにして筒状部材１の一端側１１及び他端側１２においてシールがなされることにより、２つの配管流路４，５の間を密封した状態で接続することができる。 In this pipe connection structure, when the one end side 11 of the tubular member 1 is inserted into the opening end vicinity 41 of one of the pipe flow paths 4, the lip portion 22 of the one end side seal portion 2 is inside the opening end vicinity 41. It is pressed against the peripheral surface 41a to seal it. Further, when the vicinity 51 of the opening end of the other piping flow path 5 is inserted into the other end side 12 of the tubular member 1, the O-ring 32 of the other end side sealing portion 3 is near the opening end of the other piping flow path 5. The outer peripheral surface 51a of 51 (in this embodiment, the bottom of the annular groove 33) and the inner peripheral surface 31a of the inner peripheral annular member 31 are pressed and sealed. By sealing the tubular member 1 at one end side 11 and the other end side 12, the two piping flow paths 4 and 5 can be connected in a sealed state.

すなわち、この配管接続構造を用いると、筒状部材１の一端側１１を一方の配管流路４内に差し込み、筒状部材１の他端側１２内に他方の配管流路５を差し込むという簡便な組み付け作業だけで、２つの配管流路４，５の間の芯ずれを吸収して密封した状態で接続することができる。 That is, when this pipe connection structure is used, one end side 11 of the tubular member 1 is inserted into one pipe flow path 4, and the other pipe flow path 5 is inserted into the other end side 12 of the tubular member 1. It is possible to absorb the misalignment between the two piping flow paths 4 and 5 and connect them in a sealed state only by the proper assembly work.

そして、この配管接続構造に用いる筒状部材１は、埋設環状部材２１及び内周環状部材３１が筒状部材１に一体化されており、Ｏリング３２は予め他方の配管流路５に取り付けておけばよいので、分離された構成部品の点数が少なく、取扱いが容易である。 In the tubular member 1 used for this pipe connection structure, the buried annular member 21 and the inner peripheral annular member 31 are integrated with the tubular member 1, and the O-ring 32 is previously attached to the other piping flow path 5. Since it is sufficient, the number of separated components is small and the handling is easy.

さらに、この配管接続構造は、筒状部材１の形状が複雑ではなく、Ｏリング３２は一般的に使用される既製品でよいので、製造が容易である。この筒状部材１を射出成形によって製造するには、２つに分割される金型を用いればよい。 Further, in this pipe connection structure, the shape of the cylindrical member 1 is not complicated, and the O-ring 32 may be a generally used ready-made product, so that it is easy to manufacture. In order to manufacture the tubular member 1 by injection molding, a mold divided into two may be used.

〔第２の実施形態〕
図２は、本発明の第２の実施形態に係る配管接続構造の断面図である。図３は、本発明の第２の実施形態に係る配管接続構造の要部断面図である。 [Second Embodiment]
FIG. 2 is a cross-sectional view of a pipe connection structure according to a second embodiment of the present invention. FIG. 3 is a cross-sectional view of a main part of the pipe connection structure according to the second embodiment of the present invention.

本発明の実施形態に係る配管接続構造は、図２に示すように、他方の配管流路５の開口端近傍５１に、係合爪５２を設けて構成してもよい。また、筒状部材１の他端側開口端に外周フランジ１２ａを設けてもよい。この実施形態においては、係合爪５２及び外周フランジ１２ａが設けられていることの他については、第１の実施形態と同様であるので、説明を援用する。 As shown in FIG. 2, the pipe connection structure according to the embodiment of the present invention may be configured by providing an engaging claw 52 in the vicinity of the opening end 51 of the other pipe flow path 5. Further, the outer peripheral flange 12a may be provided at the other end side opening end of the cylindrical member 1. In this embodiment, the same as in the first embodiment except that the engaging claw 52 and the outer peripheral flange 12a are provided, so the description will be incorporated.

この係合爪５２は、他方の配管流路５の開口端に等間隔に複数突設されており、先端側が外方（外径側）に向けて突出形成されている。なお、この実施形態においては、他方の配管流路５を合成樹脂材料から形成することが好ましく、その場合には、係合爪５２は、他方の配管流路５に一体的に形成することができる。 A plurality of engaging claws 52 are projected at equal intervals at the open end of the other piping flow path 5, and the tip end side is formed so as to project outward (outer diameter side). In this embodiment, it is preferable that the other pipe flow path 5 is formed from a synthetic resin material, and in that case, the engaging claw 52 may be integrally formed with the other pipe flow path 5. can.

係合爪５２は、図３に示すように、他方の配管流路５の開口端近傍５１が内周環状部材３１に差し込まれたときに、内周環状部材３１に係合する。すなわち、係合爪５２は、開口端近傍５１の内周環状部材３１への差し込みの開始及び途中においては、内周環状部材３１の内周面３１ａに押圧されて、内方（軸方向）に弾性変形される。開口端近傍５１の内周環状部材３１への差し込みが完了すると、係合爪５２は、内周環状部材３１の内周面３１ａよりも差し込み方向前方側（図３中下方）の内周面３１ａに当接しない位置に至る。このとき、係合爪５２は、弾性力により外方（外径側）に復帰する。弾性力により復帰した係合爪５２は、内周環状部材３１の差し込み方向前方側（図３中下方）の端部に係合する。 As shown in FIG. 3, the engaging claw 52 engages with the inner peripheral annular member 31 when the vicinity 51 of the opening end of the other piping flow path 5 is inserted into the inner peripheral annular member 31. That is, the engaging claw 52 is pressed inward (in the axial direction) by the inner peripheral surface 31a of the inner peripheral annular member 31 at the start and during the insertion into the inner peripheral annular member 31 near the opening end 51. It is elastically deformed. When the insertion of the vicinity of the opening end 51 into the inner peripheral annular member 31 is completed, the engaging claw 52 has an inner peripheral surface 31a on the front side (lower in FIG. 3) in the insertion direction with respect to the inner peripheral surface 31a of the inner peripheral annular member 31. It reaches a position where it does not come into contact with. At this time, the engaging claw 52 returns to the outside (outer diameter side) by the elastic force. The engaging claw 52 returned by the elastic force engages with the end portion of the inner peripheral annular member 31 on the front side (lower in FIG. 3) in the insertion direction.

この配管接続構造においては、係合爪５２の内周環状部材３１に対する係合により、内周環状部材３１からの他方の配管流路５の抜けが防止される。この配管接続構造においては、係合爪５２が内周環状部材３１に係合するので、他方の配管流路５の筒状部材１への差し込み量を短くしても、他方の配管流路５の筒状部材１からの抜けを防止することができ、軸方向について小型化を図ることができる。 In this pipe connection structure, the engagement of the engaging claw 52 with the inner peripheral annular member 31 prevents the other piping flow path 5 from coming off from the inner peripheral annular member 31. In this pipe connection structure, since the engaging claw 52 engages with the inner peripheral annular member 31, even if the insertion amount of the other pipe flow path 5 into the tubular member 1 is shortened, the other pipe flow path 5 is used. Can be prevented from coming off from the tubular member 1 and can be miniaturized in the axial direction.

なお、内周環状部材３１の内周面３１ａには、係合爪５２が係合するための係合孔又は係合溝を設けてもよい。 The inner peripheral surface 31a of the inner peripheral annular member 31 may be provided with an engaging hole or an engaging groove for engaging the engaging claw 52.

また、係合爪５２は、筒状部材１の他端側１２が他方の配管流路５の開口端近傍５１に差し込まれる場合には、他方の配管流路５の開口端近傍５１に、内方に向けて設けてもよい。 Further, when the other end side 12 of the tubular member 1 is inserted into the vicinity of the opening end 51 of the other piping flow path 5, the engaging claw 52 is inside 51 near the opening end of the other piping flow path 5. It may be provided toward the side.

さらに、係合爪５２は、一方の配管流路４の開口端近傍４１に、筒状部材１の一端側１１に一方の配管流路４の開口端近傍４１が差し込まれる場合には、外方に向けて設けてもよいし、筒状部材１の一端側１１が一方の配管流路４の開口端近傍４１に差し込まれる場合には、内方に向けて設けてもよい。 Further, the engaging claw 52 is outward when the vicinity 41 of the opening end of one of the piping flow paths 4 is inserted into the vicinity 41 of the opening end of one piping flow path 4 and the vicinity of the opening end 41 of one piping flow path 4 is inserted into the one end side 11 of the tubular member 1. When the one end side 11 of the tubular member 1 is inserted into the vicinity of the opening end 41 of one of the piping flow paths 4, it may be provided toward the inside.

筒状部材１の他端側開口端には、外周フランジ１２ａを設けてもよい。外周フランジ１２ａを設けることにより、筒状部材１の他端側１２への差し込み作業をより容易にすることができる。 An outer peripheral flange 12a may be provided at the other end of the tubular member 1. By providing the outer peripheral flange 12a, it is possible to more easily insert the cylindrical member 1 into the other end side 12.

〔その他の実施形態〕
図４、図５、図６は、本発明の第１の実施形態及び第２の実施形態の変形例に係る配管接続構造の一例を示す要部断面図である。図示の例では、第１の実施形態に係る配管接続構造の変形例を示している。これらの形態において、第１の実施形態と同様であるものは、説明を援用して省略する。 [Other Embodiments]
4, 5 and 6 are cross-sectional views of a main part showing an example of a pipe connection structure according to a modification of the first embodiment and the second embodiment of the present invention. In the illustrated example, a modified example of the pipe connection structure according to the first embodiment is shown. In these embodiments, those similar to those in the first embodiment will be omitted with reference to the description.

図４において、一端側シール部２は、円環状シール部材であるＯリング２４を筒状部材１の一端側１１の外周面に配置して構成してもよい。すなわち、この一端側シール部２は、一方の配管流路４の開口端近傍４１の内周面４１ａに接する外周環状部材２３と、該外周環状部材２３と一方の配管流路４の開口端近傍４１の内周面４１ａとの間に配置されたＯリング２４とからなる。
外周環状部材２３には、外周環状部材２３の外周面２３ａに全周に亘って環状溝２５が形成されている。
そして、外周面２３ａに全周に亘って形成されている環状溝２５に、Ｏリング２４が配置されている。 In FIG. 4, the one-end side seal portion 2 may be configured by arranging the O-ring 24, which is an annular seal member, on the outer peripheral surface of the one end side 11 of the tubular member 1. That is, the one end side seal portion 2 has an outer peripheral annular member 23 in contact with the inner peripheral surface 41a of the opening end vicinity 41 of one piping flow path 4, and the outer peripheral annular member 23 and the vicinity of the opening end of one piping flow path 4. It is composed of an O-ring 24 arranged between the inner peripheral surface 41a of 41 and the inner peripheral surface 41a.
The outer peripheral annular member 23 is formed with an annular groove 25 over the entire circumference on the outer peripheral surface 23a of the outer peripheral annular member 23.
An O-ring 24 is arranged in an annular groove 25 formed on the outer peripheral surface 23a over the entire circumference.

なお、Ｏリング２４は、環状溝２５を設けずに、外周環状部材２３の外周面２３ａ上に配置してもよい。この場合、環状溝２５に代えて、配管流路４の開口端近傍４１の内周面４１ａに溝を設けることによって、Ｏリング２４を配置することもできる。 The O-ring 24 may be arranged on the outer peripheral surface 23a of the outer peripheral annular member 23 without providing the annular groove 25. In this case, the O-ring 24 can be arranged by providing a groove on the inner peripheral surface 41a near the opening end 41 of the piping flow path 4 instead of the annular groove 25.

また、図５に示すように、他端側シール部３は、円環状シール部材であるリップ部３６を、筒状部材１の他端側１２の内周面に膨出形成して構成してもよい。すなわち、この他端側シール部３は、筒状部材１の他端側１２に埋設された硬質の埋設環状部材３５と、他端側１２の内周面に膨出形成されたリップ部３６とからなる。 Further, as shown in FIG. 5, the other end side seal portion 3 is configured by forming a lip portion 36, which is an annular seal member, on the inner peripheral surface of the other end side 12 of the tubular member 1. May be good. That is, the other end side seal portion 3 includes a hard embedded annular member 35 embedded in the other end side 12 of the tubular member 1 and a lip portion 36 bulging formed on the inner peripheral surface of the other end side 12. Consists of.

リップ部３６は、筒状部材１に一体として筒状部材１とともに形成された膨出（突条）部であり、埋設環状部材３５の内周側となる位置に、円環状をなして形成されている。このリップ部３６の先端部（最内周部）は、平坦な円筒面となっている。リップ部３６の内径は、他方の配管流路５の開口端近傍５１の外径よりもやや小径となっている。リップ部３６は、他方の配管流路５の開口端近傍５１が差し込まれたとき、開口端近傍５１の外周面５１ａに押圧されて弾性変形し、開口端近傍５１の外径に倣わされる。このときの弾性変形量が絞め代となる。 The lip portion 36 is a bulging (protruding) portion formed integrally with the tubular member 1 together with the tubular member 1, and is formed in an annular shape at a position on the inner peripheral side of the embedded annular member 35. ing. The tip portion (innermost peripheral portion) of the lip portion 36 has a flat cylindrical surface. The inner diameter of the lip portion 36 is slightly smaller than the outer diameter of 51 near the opening end of the other piping flow path 5. When the lip portion 36 near the opening end 51 of the other piping flow path 5 is inserted, the lip portion 36 is pressed against the outer peripheral surface 51a of the opening end vicinity 51 and elastically deformed, and is imitated by the outer diameter of the opening end vicinity 51. .. The amount of elastic deformation at this time serves as the throttle allowance.

また、図６に示すように、一端側シール部２は、円環状シール部材であるＯリング２４を筒状部材１の一端側１１の外周面に配置して構成し、他端側シール部３は、円環状シール部材であるリップ部３６を、筒状部材１の他端側１２の内周面に膨出形成して構成してもよい。 Further, as shown in FIG. 6, the one end side seal portion 2 is configured by arranging the O-ring 24, which is an annular seal member, on the outer peripheral surface of the one end side 11 of the tubular member 1, and the other end side seal portion 3 May be formed by forming the lip portion 36, which is an annular seal member, on the inner peripheral surface of the other end side 12 of the tubular member 1.

〔耐高圧の配管接続構造の実施形態〕
図７は、本発明の変形例の要部断面図である。
この実施形態は、筒状部材１の内圧が高圧となる場合に特に好適な耐高圧性能を備えた実施形態である。耐高圧性能とは、筒状部材１の内圧が所定の高圧状態に達しても、この筒状部材１が接続される配管流路４，５から、筒状部材１が抜けないことをいう。 [Embodiment of High Pressure Resistant Piping Connection Structure]
FIG. 7 is a cross-sectional view of a main part of a modified example of the present invention.
This embodiment is an embodiment having high pressure resistance performance that is particularly suitable when the internal pressure of the cylindrical member 1 becomes high pressure. The high pressure resistance performance means that the tubular member 1 does not come out from the piping flow paths 4 and 5 to which the tubular member 1 is connected even if the internal pressure of the tubular member 1 reaches a predetermined high pressure state.

なお、この実施形態において、第１の実施形態と同様であるものは、説明を援用して省略する。 In this embodiment, those similar to those in the first embodiment will be omitted with reference to the description.

この実施形態における配管接続構造において、筒状部材１は、一端側１１（図７中下方）が大径となされ、他端側１２（図７中上方）が小径となされ、これら一端側１１及び他端側１２が漏斗状のベロー部１ａを介して一体的に連設されている。筒状部材１は、一端側１１が一方の配管流路４の開口端近傍４１に差し込まれ、他端側１２に他方の配管流路５の開口端近傍５１が差し込まれる。 In the pipe connection structure of this embodiment, the tubular member 1 has a large diameter at one end side 11 (lower in FIG. 7) and a small diameter at the other end side 12 (upper in FIG. 7). The other end side 12 is integrally connected via a funnel-shaped bellows portion 1a. In the tubular member 1, one end side 11 is inserted into the vicinity of the opening end 41 of one piping flow path 4, and the other end side 12 is inserted near the opening end 51 of the other piping flow path 5.

この実施形態においては、接続する配管流路４，５の径に応じて、一端側１１が他端側１２よりも大径に形成されている。一端側１１及び他端側１２は、連結する配管流路４，５の位置に応じて、同軸に形成されてもよいし、異なる軸を有して形成されてもよい。 In this embodiment, the one end side 11 is formed to have a larger diameter than the other end side 12 according to the diameters of the pipe flow paths 4 and 5 to be connected. The one end side 11 and the other end side 12 may be formed coaxially or have different axes depending on the positions of the pipe flow paths 4 and 5 to be connected.

筒状部材１の一端側１１の外周面は、一端側シール部２となっている。筒状部材１の一端側１１には、硬質の埋設環状部材２１が埋設されている。埋設環状部材２１は、金属や硬質の合成樹脂材料から円筒状に形成されている。この埋設環状部材２１は、筒状部材１が射出成形等により形成されるときに、いわゆるインサート成形によって筒状部材１内に埋設されることができる。 The outer peripheral surface of the one end side 11 of the tubular member 1 is the one end side seal portion 2. A hard embedded annular member 21 is embedded in one end side 11 of the tubular member 1. The embedded annular member 21 is formed in a cylindrical shape from a metal or a hard synthetic resin material. The embedded annular member 21 can be embedded in the tubular member 1 by so-called insert molding when the tubular member 1 is formed by injection molding or the like.

埋設環状部材２１は、筒状部材１の一端側１１に沿う円筒部分２１ｂと、円筒部分２１ｂの差し込み方向後端側が外周側に向けて屈曲形成されたフランジ部分２１ｃとからなる。円筒部分２１ｂとフランジ部分２１ｃとの間は屈曲部２１ａとなっており、この屈曲部２１ａが山折りとなっている側は凸アール状に形成されている。 The embedded annular member 21 includes a cylindrical portion 21b along one end side 11 of the tubular member 1 and a flange portion 21c formed by bending the rear end side of the cylindrical portion 21b in the insertion direction toward the outer peripheral side. A bent portion 21a is formed between the cylindrical portion 21b and the flange portion 21c, and the side where the bent portion 21a is mountain-folded is formed in a convex radius shape.

埋設環状部材２１は、屈曲部２１ａを、ベロー部１ａの一端側１１近傍に位置させている。屈曲部２１ａは、凸アール状となっている山折りとなっている側を、ベロー部１ａの側に向けている。ベロー部１ａの一端側１１近傍に、埋設環状部材２１の端部ではなく屈曲部２１ａの山折りとなっている側が位置していることにより、内圧が高圧となってベロー部１ａが外方側に膨満しても、応力集中が緩和され、応力歪み集中による破損が防止されるので、耐高圧性能が向上される。 The embedded annular member 21 has a bent portion 21a located near one end side 11 of the bellows portion 1a. In the bent portion 21a, the side of the convex rounded mountain fold is directed toward the side of the bellows portion 1a. Since the mountain-folded side of the bent portion 21a is located near one end side 11 of the bellows portion 1a instead of the end portion of the embedded annular member 21, the internal pressure becomes high and the bellows portion 1a is on the outer side. Even if it swells, the stress concentration is relaxed and the damage due to the stress strain concentration is prevented, so that the high pressure resistance performance is improved.

一端側１１の外周面には、円環状シール部となる複数の円環突条２２ａ、２２ｂを膨出形成してもよい。特に、一端側１１の外径の公差が大きい場合には、円環突条２２ａ、２２ｂを形成することが好ましい。各円環突条２２ａ、２２ｂは、筒状部材１に一体として筒状部材１とともに形成された膨出（突条）部であり、埋設環状部材２１の外周側となる位置に、円環状をなして形成する。円環突条２２ａ、２２ｂを形成すると、円環突条２２ａ、２２ｂがない場合に比較して、一端側１１の外径（円環突条２２ａ、２２ｂの高さ）を大きく変形（圧縮）させることが容易となるので、この変形量によって外径の公差を吸収することができる。 A plurality of annular protrusions 22a and 22b serving as an annular seal portion may be formed on the outer peripheral surface of the one end side 11 by bulging. In particular, when the tolerance of the outer diameter of the one end side 11 is large, it is preferable to form the annular ridges 22a and 22b. Each of the annular protrusions 22a and 22b is a bulging (protrusion) portion formed integrally with the tubular member 1 together with the tubular member 1, and an annular shape is formed at a position on the outer peripheral side of the embedded annular member 21. Form without doing. When the annulus protrusions 22a and 22b are formed, the outer diameter of the one end side 11 (the height of the annulus protrusions 22a and 22b) is greatly deformed (compressed) as compared with the case where the annulus protrusions 22a and 22b are not formed. Since it is easy to make the outer diameter, the tolerance of the outer diameter can be absorbed by this amount of deformation.

更に、この円環突条２２ａ、２２ｂの形状は、ゴム材の充填率が低い形状が好ましく、例えば、断面三角形状や断面半円形状とすることが好ましい。円環突条２２ａ、２２ｂは、充填率が低い形状であることにより、高さの変形（圧縮）がより容易となり、いわゆる嵌合ムシレを防止することができる。 Further, the shape of the annular ridges 22a and 22b is preferably a shape having a low filling rate of the rubber material, for example, a triangular cross section or a semicircular cross section. Since the annular ridges 22a and 22b have a shape having a low filling rate, the height of the ridges 22a and 22b can be easily deformed (compressed), and so-called fitting mussels can be prevented.

各円環突条２２ａ、２２ｂの外径は、一方の配管流路４の内周面４１ａの内径よりもやや大径とする。各円環突条２２ａ、２２ｂは、一方の配管流路４に差し込まれたとき、内周面４１ａに押圧されて弾性変形し、内周面４１ａの内径に倣わされる。このときの弾性変形量が絞め代となる。 The outer diameter of each of the annular protrusions 22a and 22b is slightly larger than the inner diameter of the inner peripheral surface 41a of one of the piping flow paths 4. When the annular ridges 22a and 22b are inserted into one of the piping flow paths 4, they are pressed against the inner peripheral surface 41a and elastically deformed to follow the inner diameter of the inner peripheral surface 41a. The amount of elastic deformation at this time serves as the throttle allowance.

円環突条２２ａ、２２ｂの高さ、幅及び本数は特に限定されない。各円環突条２２ａ、２２ｂの弾性変形量（絞め代）を大きくし、また、本数を増やすことにより、耐高圧性能の向上を図ることができる。 The height, width and number of the annulus protrusions 22a and 22b are not particularly limited. By increasing the amount of elastic deformation (squeezing allowance) of each of the ring ridges 22a and 22b and increasing the number of the ridges 22a and 22b, it is possible to improve the high pressure resistance performance.

筒状部材１の一端側１１の先端部近傍の外周面には、抜け止め突条２７が形成されている。この抜け止め突条２７は、一端側１１の外周面全周に亘って形成された円環状の突条である。この抜け止め突条２７は、一方の配管流路４に筒状部材１が十分に差し込まれたときに、内周面４１ａ内を通過して、差し込み方向の反対側に抜け、筒状部材１の一方の配管流路４からの抜け止めを行う。 A retaining ridge 27 is formed on the outer peripheral surface of the tubular member 1 in the vicinity of the tip end portion of the one end side 11. The retaining ridge 27 is an annular ridge formed over the entire outer peripheral surface of the one end side 11. When the tubular member 1 is sufficiently inserted into one of the piping flow paths 4, the retaining ridge 27 passes through the inner peripheral surface 41a and comes out to the opposite side in the insertion direction, and the tubular member 1 Prevents the pipe from coming off from one of the piping flow paths 4.

本実施形態において、一方の配管流路４の内周面４１ａには、筒状部材１が差し込まれる入口側に、拡径部４１ｃが形成されている。拡径部４１ｃの内径は、抜け止め突条２７の稜線部の外径にほぼ等しくなっており、抜け止め突条２７を内周面４１ａ内に挿入することが容易となっている。拡径部４１ｃは、面取り部（テーパ部）４１ｄを介して、内周面４１ａの他の部分に連続している。 In the present embodiment, a diameter-expanded portion 41c is formed on the inner peripheral surface 41a of one of the piping flow paths 4 on the inlet side into which the tubular member 1 is inserted. The inner diameter of the enlarged diameter portion 41c is substantially equal to the outer diameter of the ridgeline portion of the retaining ridge 27, so that the retaining ridge 27 can be easily inserted into the inner peripheral surface 41a. The enlarged diameter portion 41c is continuous with the other portion of the inner peripheral surface 41a via the chamfered portion (tapered portion) 41d.

この実施形態においては、抜け止め突条２７が筒状部材１の一方の配管流路４からの抜け止めを行うことにより、耐高圧性能の向上が図られている。 In this embodiment, the high pressure resistance is improved by preventing the retaining ridge 27 from coming off from one of the piping flow paths 4 of the tubular member 1.

また、筒状部材１の一端側１１には、一方の配管流路４への差し込みが想定される長さだけ先端部から差し込み方向後方側に、外周に向けてフランジ２８が設けられている。このフランジ２８には、埋設環状部材２１のフランジ部分２１ｃが埋設されている。このフランジ２８は、一方の配管流路４に筒状部材１の一端側１１が十分に差し込まれたときに、内周面４１ａの入口の周囲に当接し、筒状部材１がそれ以上差し込まれないようにして、筒状部材１の位置決めを行う。 Further, a flange 28 is provided on one end side 11 of the tubular member 1 from the tip end portion to the rear side in the insertion direction by a length expected to be inserted into one of the piping flow paths 4 toward the outer periphery. A flange portion 21c of the embedded annular member 21 is embedded in the flange 28. When the one end side 11 of the tubular member 1 is sufficiently inserted into one of the piping flow paths 4, the flange 28 comes into contact with the periphery of the inlet of the inner peripheral surface 41a, and the cylindrical member 1 is further inserted. Position the tubular member 1 so that there is no such thing.

このフランジ２８は、内圧が高圧となってベロー部１ａが外方側に膨満しようとするときに、このベロー部１ａを支えてベロー部１ａの変形を小さく抑えるので、耐高圧性能を向上させている。 When the internal pressure becomes high and the bellows portion 1a tries to expand outward, the flange 28 supports the bellows portion 1a and suppresses the deformation of the bellows portion 1a to a small extent, thereby improving the high pressure resistance performance. There is.

本実施形態では、耐高圧性能を向上させるために、内周環状部材３１の厚さ〔（外径−内径）／２〕は、できるだけ厚くなされている。これにより、他端側シール部３の負荷を減少させ、耐高圧性能を向上させることができる。 In the present embodiment, in order to improve the high pressure resistance performance, the thickness [(outer diameter-inner diameter) / 2] of the inner peripheral annular member 31 is made as thick as possible. As a result, the load on the other end side seal portion 3 can be reduced and the high pressure resistance can be improved.

Ｏリング３２は、ゴム状弾性材料により断面円形の円環状（ドーナツ形状）に形成された一般的なものである。このＯリング３２は、他方の配管流路５の開口端近傍５１の外周面５１ａに形成された環状溝３３内に配置されている。環状溝３３は、開口端近傍５１の外周面５１ａに全周に亘って形成されている。 The O-ring 32 is a general one formed of a rubber-like elastic material into an annular shape (doughnut shape) having a circular cross section. The O-ring 32 is arranged in the annular groove 33 formed on the outer peripheral surface 51a of the vicinity of the opening end 51 of the other piping flow path 5. The annular groove 33 is formed on the outer peripheral surface 51a in the vicinity of the opening end 51 over the entire circumference.

Ｏリング３２の初期状態における内径は、環状溝３３の底面の外径よりも小径となっている。環状溝３３内に配置されたＯリング３２は、初期状態よりも弾性的に伸ばされた状態となっており、環状溝３３の底面に圧着する。環状溝３３内に配置されたＯリング３２の外径は、内周環状部材３１の内周面３１ａの内径よりもやや大径となっている。環状溝３３内のＯリング３２は、他方の配管流路５の開口端近傍５１が内周環状部材３１内に差し込まれたとき、内周環状部材３１の内周面３１ａに押圧されて弾性変形し、内周環状部材３１の内径に倣わされる。このときの弾性変形量が絞め代となる。 The inner diameter of the O-ring 32 in the initial state is smaller than the outer diameter of the bottom surface of the annular groove 33. The O-ring 32 arranged in the annular groove 33 is in a state of being elastically stretched from the initial state, and is crimped to the bottom surface of the annular groove 33. The outer diameter of the O-ring 32 arranged in the annular groove 33 is slightly larger than the inner diameter of the inner peripheral surface 31a of the inner peripheral annular member 31. The O-ring 32 in the annular groove 33 is elastically deformed by being pressed against the inner peripheral surface 31a of the inner peripheral annular member 31 when the vicinity 51 near the opening end of the other piping flow path 5 is inserted into the inner peripheral annular member 31. Then, it is imitated by the inner diameter of the inner peripheral annular member 31. The amount of elastic deformation at this time serves as the throttle allowance.

なお、内周環状部材３１の内周面３１ａには、他方の配管流路５の開口端近傍５１が差し込まれる入口側に、面取り部（テーパ部）３１ｂが形成されている。この面取り部３１ｂにより、他方の配管流路５を内周面３１ａ内に挿入することが容易となっており、また、他方の配管流路５の挿入時のＯリング３２の損傷が防止されている。 A chamfered portion (tapered portion) 31b is formed on the inner peripheral surface 31a of the inner peripheral annular member 31 on the inlet side into which the vicinity 51 of the opening end of the other piping flow path 5 is inserted. The chamfered portion 31b makes it easy to insert the other piping flow path 5 into the inner peripheral surface 31a, and prevents damage to the O-ring 32 when the other piping flow path 5 is inserted. There is.

他方の配管流路５の開口端近傍５１には、係合爪５２が設けられている。この係合爪５２は、他方の配管流路５の開口端に等間隔に複数突設されており、先端側が外周側に向けて屈曲されて形成されている。他方の配管流路５を合成樹脂材料から形成する場合には、係合爪５２は、他方の配管流路５に一体的に形成することができる。 An engaging claw 52 is provided in the vicinity of the opening end 51 of the other piping flow path 5. A plurality of engaging claws 52 are provided at equal intervals at the open ends of the other piping flow path 5, and the tip end side is bent toward the outer peripheral side. When the other pipe flow path 5 is formed from a synthetic resin material, the engaging claw 52 can be integrally formed with the other pipe flow path 5.

係合爪５２は、他方の配管流路５が筒状部材１の他端側１２に差し込まれたときに、内周環状部材３１に係合する。すなわち、係合爪５２は、他方の配管流路５の内周環状部材３１への差し込みの開始及び途中においては、内周環状部材３１の内周面３１ａに押圧されて、内方（軸方向）に弾性変形される。他方の配管流路５の内周環状部材３１への差し込みが完了すると、係合爪５２は、内周環状部材３１の内周面３１ａよりも差し込み方向前方側（図７中下方）の内周面３１ａに当接しない位置に至る。このとき、係合爪５２は、弾性力により外方（外径側）に復帰する。弾性力により復帰した係合爪５２は、内周環状部材３１の差し込み方向前方側（図７中下方）の端部に係合する。 The engaging claw 52 engages with the inner peripheral annular member 31 when the other piping flow path 5 is inserted into the other end side 12 of the tubular member 1. That is, the engaging claw 52 is pressed inward (axially) by the inner peripheral surface 31a of the inner peripheral annular member 31 at the start and during the insertion of the other piping flow path 5 into the inner peripheral annular member 31. ) Is elastically deformed. When the insertion of the other piping flow path 5 into the inner peripheral annular member 31 is completed, the engaging claw 52 is on the inner circumference of the inner peripheral annular member 31 on the front side in the insertion direction (lower in FIG. 7) with respect to the inner peripheral surface 31a. It reaches a position where it does not abut on the surface 31a. At this time, the engaging claw 52 returns to the outside (outer diameter side) by the elastic force. The engaging claw 52 returned by the elastic force engages with the end portion of the inner peripheral annular member 31 on the front side (lower in FIG. 7) in the insertion direction.

この配管接続構造においては、係合爪５２の内周環状部材３１に対する係合により、内周環状部材３１からの他方の配管流路５の抜けが防止される。この配管接続構造においては、係合爪５２が内周環状部材３１に係合するので、他方の配管流路５の筒状部材１への差し込み量を短くしても、他方の配管流路５の筒状部材１からの抜けを防止することができ、耐高圧性能を向上させることができるとともに、軸方向について小型化を図ることができる。 In this pipe connection structure, the engagement of the engaging claw 52 with the inner peripheral annular member 31 prevents the other piping flow path 5 from coming off from the inner peripheral annular member 31. In this pipe connection structure, since the engaging claw 52 engages with the inner peripheral annular member 31, even if the insertion amount of the other pipe flow path 5 into the tubular member 1 is shortened, the other pipe flow path 5 is used. Can be prevented from coming off from the tubular member 1, the high pressure resistance performance can be improved, and the size in the axial direction can be reduced.

また、他方の配管流路５の開口端近傍５１には、筒状部材１の他端側１２への差し込みが想定される長さだけ先端部から差し込み方向後方側に、外周フランジ５１ｂが設けられている。この外周フランジ５１ｂは、他方の配管流路５が筒状部材１に十分に差し込まれたときに、筒状部材１の他端部に当接し、他方の配管流路５がそれ以上差し込まれないようにして、他方の配管流路５の位置決めを行う。 Further, in the vicinity of the opening end 51 of the other piping flow path 5, an outer peripheral flange 51b is provided on the rear side in the insertion direction from the tip portion by the length expected to be inserted into the other end side 12 of the tubular member 1. ing. The outer peripheral flange 51b comes into contact with the other end of the tubular member 1 when the other piping flow path 5 is sufficiently inserted into the tubular member 1, and the other piping flow path 5 is not inserted any further. In this way, the other piping flow path 5 is positioned.

この配管接続構造においては、筒状部材１の一端側１１が一方の配管流路４の開口端近傍４１内に差し込まれると、一端側シール部２の外周面が、開口端近傍４１の内周面４１ａに押接されてシールする。また、筒状部材１の他端側１２に他方の配管流路５の開口端近傍５１が差し込まれると、他端側シール部３のＯリング３２が、環状溝３３の底部及び内周環状部材３１の内周面３１ａに押接されてシールする。このようにして筒状部材１の一端側１１及び他端側１２においてシールがなされることにより、２つの配管流路４，５の間を密封した状態で接続することができる。 In this pipe connection structure, when the one end side 11 of the tubular member 1 is inserted into the opening end vicinity 41 of one of the pipe flow paths 4, the outer peripheral surface of the one end side seal portion 2 becomes the inner circumference of the opening end vicinity 41. It is pressed against the surface 41a to seal it. Further, when the vicinity 51 of the opening end of the other piping flow path 5 is inserted into the other end side 12 of the tubular member 1, the O-ring 32 of the other end side seal portion 3 becomes the bottom portion of the annular groove 33 and the inner peripheral annular member. It is pressed against the inner peripheral surface 31a of 31 to seal it. By sealing the tubular member 1 at one end side 11 and the other end side 12, the two piping flow paths 4 and 5 can be connected in a sealed state.

すなわち、この配管接続構造を用いると、筒状部材１の一端側１１を一方の配管流路４内に差し込み、筒状部材１の他端側１２内に他方の配管流路５を差し込むという簡便な組み付け作業だけで、２つの配管流路４，５の間の芯ずれを吸収して密封した状態で接続することができる。また、この実施形態においては、耐高圧性能が向上されており、筒状部材１の内圧が高圧となる場合に用いて特に好適である。 That is, when this pipe connection structure is used, one end side 11 of the tubular member 1 is inserted into one pipe flow path 4, and the other pipe flow path 5 is inserted into the other end side 12 of the tubular member 1. It is possible to absorb the misalignment between the two piping flow paths 4 and 5 and connect them in a sealed state only by the proper assembly work. Further, in this embodiment, the high pressure resistance performance is improved, and it is particularly suitable for use when the internal pressure of the cylindrical member 1 becomes high pressure.

図８は、本発明の変形例における変形状態を示す図である。 FIG. 8 is a diagram showing a deformed state in a modified example of the present invention.

この実施形態の配管接続構造においては、図８（ａ）に示す内圧が低いときに対して、図８（ｂ）に示す内圧が高いときには、筒状部材１のベロー部１ａが外方に向けて大きく変形（膨満）する。このようにベロー部１ａが変形しても、抜け止め突条２７が筒状部材１の一方の配管流路４からの抜け止めを行うので、筒状部材１が一方の配管流路４から抜けることがなく、耐高圧性能が向上している。 In the pipe connection structure of this embodiment, when the internal pressure shown in FIG. 8 (a) is low, when the internal pressure shown in FIG. 8 (b) is high, the bellows portion 1a of the tubular member 1 faces outward. It deforms (inflates) greatly. Even if the bellows portion 1a is deformed in this way, the retaining ridge 27 prevents the tubular member 1 from coming off from one of the piping flow paths 4, so that the tubular member 1 comes out of one of the piping flow paths 4. There is no such thing, and the high pressure resistance is improved.

また、各円環突条２２ａ、２２ｂを設けた場合には、各円環突条２２ａ、２２ｂの弾性変形（絞め代）により、ベロー部１ａが内圧により膨満しても筒状部材１が一方の配管流路４から抜けることがなく、耐高圧性能が向上する。 Further, when the annular protrusions 22a and 22b are provided, the tubular member 1 is on one side even if the bellows portion 1a is inflated by the internal pressure due to the elastic deformation (squeezing allowance) of the annular protrusions 22a and 22b. The high pressure resistance performance is improved without coming out of the piping flow path 4 of the above.

また、この実施形態においては、フランジ２８は、内圧が高圧となってベロー部１ａが外方側に膨満しようとするときに、このベロー部１ａを支えてベロー部１ａの変形を小さく抑えるので、耐高圧性能を向上させている。 Further, in this embodiment, when the internal pressure becomes high and the bellows portion 1a tries to expand outward, the flange 28 supports the bellows portion 1a and suppresses the deformation of the bellows portion 1a to a small extent. The high pressure resistance is improved.

さらに、この実施形態においては、埋設環状部材２１が、屈曲部２１ａの凸アール状となっている山折りとなっている側をベロー部１ａの側に向けていることにより、内圧が高圧となってベロー部１ａが外方側に膨満しても、応力集中が緩和され、応力歪み集中による破損が防止されるので、耐高圧性能が向上されている。 Further, in this embodiment, the buried annular member 21 has a convex rounded side of the bent portion 21a directed toward the bellows portion 1a, so that the internal pressure becomes high. Even if the bellows portion 1a bulges outward, the stress concentration is relaxed and damage due to the stress strain concentration is prevented, so that the high pressure resistance performance is improved.

さらに、この実施形態においては、内周環状部材３１が厚くなされていることにより、筒状部材１の他端側１２の剛性が高くなり、耐高圧性能が向上されている。 Further, in this embodiment, since the inner peripheral annular member 31 is made thicker, the rigidity of the other end side 12 of the tubular member 1 is increased, and the high pressure resistance performance is improved.

さらに、この実施形態においては、係合爪５２が内周環状部材３１に係合するので、ベロー部１ａの内圧が高くなっても、他方の配管流路５が筒状部材１から抜けることがなく、耐高圧性能が向上されている。 Further, in this embodiment, since the engaging claw 52 engages with the inner peripheral annular member 31, even if the internal pressure of the bellows portion 1a becomes high, the other piping flow path 5 may come out of the tubular member 1. The high pressure resistance is improved.

１筒状部材
１１一端側
１２他端側
２一端側シール部
２１埋設環状部材
２１ａ屈曲部
２１ｂ円筒部分
２１ｃフランジ部分
２２リップ部
２２ａ円環突条
２２ｂ円環突条
２３外周環状部材
２４Ｏリング
２５環状溝
２６内周環状部材
２７抜け止め突条
２８フランジ
３他端側シール部
３１内周環状部材
３１ａ内周面
３１ｂ面取り部
３２Ｏリング
３３環状溝
３４外周環状部材
３５埋設環状部材
３６リップ部
４一方の配管流路
４１開口端近傍
４１ａ内周面
４１ｃ拡径部
４１ｄ面取り部
５他方の配管流路
５１開口端近傍
５２係合爪 1 Cylindrical member 11 One end side 12 One end side 2 One end side Seal part 21 Embedded annular member 21a Bending part 21b Cylindrical part 21c Flange part 22 Lip part 22a Circular ridge 22b Circular ridge 23 Outer ring member 24 O-ring 25 Circular groove 26 Inner peripheral annular member 27 Retaining ridge 28 Flange 3 Other end side seal part 31 Inner peripheral annular member 31a Inner peripheral surface 31b Chamfered part 32 O-ring 33 Circular groove 34 Outer ring member 35 Buried annular member 36 Lip part 4 One piping flow path 41 Near the opening end 41a Inner peripheral surface 41c Enlarged part 41d Chamfered part 5 The other piping flow path 51 Near the opening end 52 Engagement claw

Claims

A pipe connection structure in which two pipe flow paths consisting of one pipe flow path (4) and the other pipe flow path (5) are connected by a tubular member (1) made of a rubber-like elastic material.
One end side seal portion (1 end side seal portion) arranged on one end side of the tubular member (1) and connecting one end side (11) of the tubular member (1) and the vicinity of the open end of the one piping flow path (4). 2) and
The other end side that is arranged on the other end side of the tubular member (1) and connects the other end side (12) of the tubular member (1) and the vicinity of the open end of the other piping flow path (5). Equipped with a seal part (3)
One end side (11) of the tubular member (1) is inserted into the vicinity (41) of the opening end of the one pipe flow path (4), and the other pipe flow is connected to the other end side (12). The vicinity of the open end (51) of the road (5) is inserted,
The one end side seal portion (2) is provided on the outer peripheral surface of the one end side (11) of the tubular member (1), and the one end side seal portion (2) is one end of the tubular member (1). It is composed of a hard buried annular member (21) embedded in the side (11) and a lip portion (22) bulging formed on the outer peripheral surface of the one end side (11).
The other end side seal portion (3) is provided on the inner peripheral surface of the other end side (12) of the tubular member (1), and the other end side seal portion (3) is the tubular member (3). A hard inner annular member (31) arranged on the inner peripheral surface of the other end side (12) of 1) and an O-ring (32) arranged on the inner peripheral surface of the inner annular member (31). Consists of
The lip portion (22) of the one end side seal portion (2) is pressed against the inner peripheral surface near the open end of the one piping flow path (4), and the other end side seal portion (3) is said. A pipe connection structure characterized in that the O-ring (32) is pressed against an outer peripheral surface near the opening end of the other pipe flow path (5).

It has an engaging claw (52) formed so as to project outward in the vicinity of the open end of the other piping flow path (5).
The engaging claw (52) engages with the inner peripheral annular member (31) of the other end side seal portion (3) provided on the other end side (12) of the tubular member (1). The pipe connection structure according to claim 1.

A pipe connection structure in which two pipe flow paths consisting of one pipe flow path (4) and the other pipe flow path (5) are connected by a tubular member (1) made of a rubber-like elastic material.
One end side seal portion (1 end side seal portion) arranged on one end side of the tubular member (1) and connecting one end side (11) of the tubular member (1) and the vicinity of the open end of the one piping flow path (4). 2) and
The other end side that is arranged on the other end side of the tubular member (1) and connects the other end side (12) of the tubular member (1) and the vicinity of the open end of the other piping flow path (5). Equipped with a seal part (3)
One end side (11) of the tubular member (1) is inserted near the open end (41) of the one pipe flow path (4), and the other pipe flow is inserted into the other end side (12). The vicinity of the open end (51) of the road (5) is inserted,
The one end side seal portion (2) is provided on the outer peripheral surface of the one end side (11) of the tubular member (1), and the one end side seal portion (2) is one end of the tubular member (1). It is composed of a hard outer peripheral annular member (23) arranged on the outer peripheral surface of the side (11) and an O-ring (24) embedded in the outer peripheral surface of the outer peripheral annular member (23).
The other end side seal portion (3) is provided on the inner peripheral surface of the other end side (12) of the tubular member (1), and the other end side seal portion (3) is the tubular member (3). A hard inner annular member (31) arranged on the inner peripheral surface of the other end side (12) of 1) and an O-ring (32) arranged on the inner peripheral surface of the inner annular member (31). Consists of
The O-ring (24) of the one end side seal portion (2) is pressed against the inner peripheral surface near the opening end of the one piping flow path (4), and the other end side seal portion (3) is said to be said. A pipe connection structure characterized in that the O-ring (32) is pressed against an outer peripheral surface near the opening end of the other pipe flow path (5).

A pipe connection structure in which two pipe flow paths consisting of one pipe flow path (4) and the other pipe flow path (5) are connected by a tubular member (1) made of a rubber-like elastic material.
One end side seal portion (1 end side seal portion) arranged on one end side of the tubular member (1) and connecting one end side (11) of the tubular member (1) and the vicinity of the open end of the one piping flow path (4). 2) and
The other end side that is arranged on the other end side of the tubular member (1) and connects the other end side (12) of the tubular member (1) and the vicinity of the open end of the other piping flow path (5). Equipped with a seal part (3)
One end side (11) of the tubular member (1) is inserted into the vicinity (41) of the opening end of the one pipe flow path (4), and the other pipe flow is connected to the other end side (12). The vicinity of the open end (51) of the road (5) is inserted,
The one end side seal portion (2) is provided on the outer peripheral surface of the one end side (11) of the tubular member (1), and the one end side seal portion (2) is one end of the tubular member (1). It is composed of a hard buried annular member (21) embedded in the side (11) and a lip portion (22) bulging formed on the outer peripheral surface of the one end side (11).
The other end side seal portion (3) is provided on the inner peripheral surface of the other end side (12) of the tubular member (1), and the other end side seal portion (3) is the tubular member (3). It is composed of a hard embedded annular member (35) embedded in the other end side (12) of 1) and a lip portion (36) bulging formed on the inner peripheral surface of the other end side (12).
The lip portion (22) of the one end side seal portion (2) is pressed against the inner peripheral surface near the open end of the one piping flow path (4), and the other end side seal portion (3) is said. A pipe connection structure characterized in that the lip portion (35) is pressed against an outer peripheral surface near the opening end of the other pipe flow path (5).

A pipe connection structure in which two pipe flow paths consisting of one pipe flow path (4) and the other pipe flow path (5) are connected by a tubular member (1) made of a rubber-like elastic material.
One end side seal portion (1 end side seal portion) arranged on one end side of the tubular member (1) and connecting one end side (11) of the tubular member (1) and the vicinity of the open end of the one piping flow path (4). 2) and
The other end side that is arranged on the other end side of the tubular member (1) and connects the other end side (12) of the tubular member (1) and the vicinity of the open end of the other piping flow path (5). Equipped with a seal part (3)
One end side (11) of the tubular member (1) is inserted into the vicinity (41) of the opening end of the one pipe flow path (4), and the other pipe flow is connected to the other end side (12). The vicinity of the open end (51) of the road (5) is inserted,
The one end side seal portion (2) is provided on the outer peripheral surface of the one end side (11) of the tubular member (1), and the one end side seal portion (2) is one end of the tubular member (1). It is composed of a hard outer peripheral annular member (23) arranged on the outer peripheral surface of the side (11) and an O-ring (24) embedded in the outer peripheral surface of the outer peripheral annular member (23).
The other end side seal portion (3) is provided on the inner peripheral surface of the other end side (12) of the tubular member (1), and the other end side seal portion (3) is the tubular member (3). It is composed of a hard embedded annular member (35) embedded in the other end side (12) of 1) and a lip portion (36) bulging formed on the inner peripheral surface of the other end side (12).
The O-ring (24) of the one end side seal portion (2) is pressed against the inner peripheral surface near the opening end of the one piping flow path (4), and the other end side seal portion (3) is said to be said. A pipe connection structure characterized in that the lip portion (36) is pressed against an outer peripheral surface near the opening end of the other pipe flow path (5).