JP2015227701A

JP2015227701A - Pipe connecting structure and connecting member

Info

Publication number: JP2015227701A
Application number: JP2014113805A
Authority: JP
Inventors: 松弘奥田; Matsuhiro Okuda; 伸光岡崎; Nobumitsu Okazaki; 克則松木; Katsunori Matsuki; 隆介馬場; Ryusuke Baba
Original assignee: Uchiyama Manufacturing Corp; Toyota Motor Corp
Current assignee: Uchiyama Manufacturing Corp; Toyota Motor Corp
Priority date: 2014-06-02
Filing date: 2014-06-02
Publication date: 2015-12-17
Anticipated expiration: 2034-06-02
Also published as: JP6259357B2

Abstract

PROBLEM TO BE SOLVED: To provide a pipe connecting structure in which two pipes positioned at both sides of a wall member having an open hole are positively connected in a small space at the open hole while their misalignment between the open hole and each of the pipes is absorbed, and a connecting member used for the same.SOLUTION: This invention relates to a pipe connecting structure for use in connecting two pipes 2 and 3 positioned at both sides of a wall member 10 having an open hole 10a through a cylindrical connecting member 4 at the open hole 10a, and a connecting member used for the same. The connecting member 4 has: two holding parts 41 and 42 fitted to each of the two pipes 2 and 3; and a connecting part 43 connecting the two holding parts 41 and 42. One holding part 41 of the two holding parts 41 and 42 is outwardly fitted to one pipe 2 of the two pipes 2 and 3 in a close contacted state, and inwardly fitted into the open hole 10a in a close contacted state, the other holding part 42 is outwardly fitted to the other pipe 3 in a close contacted state and at the same time displacement thereof in a radial direction in respect to one holding part 41 can be performed through the connecting part 43 and a fastening ring 44 is outwardly fitted to the outer diameter part of the other holding part 42.

Description

本発明は、例えば、ケースの内外の配管をケースの壁体に形成された貫通孔において接続する配管接続構造及びこれに用いられる接続部材に関する。 The present invention relates to, for example, a pipe connection structure for connecting a pipe inside and outside a case in a through hole formed in a wall of the case, and a connection member used therefor.

自動車用インバータには、インバータケース内に冷却水流通用配管（内部配管）が組み込まれ、このケース内の内部配管には、ケースの壁体に設けられた貫通孔において、例えばコンバータに繋がる外部配管が接続される（特許文献１参照）。このような配管の接続構造においては、内部配管と外部配管、さらには貫通孔との芯ずれが生じることがあり、そのため、内部配管と外部配管との接続が的確になされないことがある。特許文献２には、インバータケースにおける内外の配管の接続構造を対象とするものではないが、ケースに固定される内外配管（上部パイプ及び下部パイプ）同士の芯ずれ、或はこれらと貫通孔とに芯ずれ（位置ずれ）があっても、パイプとケースとの間のシールを確実に行うことが可能なケースに対するパイプの接続構造が記載されている。本特許文献２では、内外の配管同士、或はこれら配管と貫通孔との芯ずれを吸収するため、貫通孔とこれに挿通されるパイプとの間に隙間を形成している。そして、パイプに形成されるフランジ部等とケースの内外壁体との間には、Ｏリング等のシール部材を介在させるようにしている。 In an inverter for an automobile, a cooling water distribution pipe (internal pipe) is incorporated in the inverter case, and the internal pipe in the case includes an external pipe connected to the converter, for example, in a through hole provided in the wall of the case. Connected (see Patent Document 1). In such a pipe connection structure, misalignment between the internal pipe and the external pipe or the through-hole may occur, and therefore the internal pipe and the external pipe may not be accurately connected. Patent Document 2 does not cover the connection structure of the internal and external piping in the inverter case, but the misalignment between the internal and external piping (upper pipe and lower pipe) fixed to the case, or these and the through holes Describes a connection structure of a pipe to a case that can reliably seal between the pipe and the case even if there is misalignment (positional deviation). In this patent document 2, in order to absorb the misalignment between the inner and outer pipes or between these pipes and the through hole, a gap is formed between the through hole and the pipe inserted therethrough. A seal member such as an O-ring is interposed between the flange portion formed on the pipe and the inner and outer wall bodies of the case.

特開２０１２−８２８８１号公報JP 2012-82881 A 特開２０１０−２７０８７１号公報JP 2010-270871 A

ところで、前記のようなインバータは、その内部に収納されるケースが小型化されることに伴い、インバータケース自体も小型化されるようになってきた。しかし、引用文献２に示されるような配管の接続構造を、インバータケースに適用しようとすると、ケースの壁体に前記シール部材によるシールスペースを確保する必要があるため、このスペースが障害となって、ケースの小型化は、充分になされ難い点が指摘される。しかも、壁体に設けられる貫通孔とパイプとには、前記位置ずれを吸収するための隙間を確保する必要があるため、この隙間と前記シールスペースとにより、一層ケースの小型化が難しくなる。また、フランジ部等とケースの内外壁体との間にシール部材を介在させた状態で、締め付け部材（固定具）によってパイプとケースとの締付け固定がなされるから、ケースの壁体にシール反力がかかり、当該壁体にこの強度に耐え得る厚みが必要とされ、ケースの重量が大となる。さらに、Ｏリング等のシール部材が必要とされるため、部品点数が多く、組付け工数も大となる。加えて、配管はケース壁体に対して限りなく直角に近い状態で取付けなければ、前記シール部材によるシール機能が充分に発揮されないので、設計精度の高度化が求められる。 By the way, as the case housed in the inverter as described above is downsized, the inverter case itself is also downsized. However, when the connection structure of the pipe as shown in the cited document 2 is applied to the inverter case, it is necessary to secure a seal space by the seal member on the case body, and this space becomes an obstacle. It is pointed out that the case is difficult to downsize sufficiently. In addition, since it is necessary to secure a gap for absorbing the displacement in the through hole and the pipe provided in the wall body, it is difficult to further reduce the size of the case due to the gap and the seal space. In addition, since the pipe and the case are fastened and fixed by the fastening member (fixing tool) in a state where the seal member is interposed between the flange portion and the inner and outer wall bodies of the case, the seal wall is not attached to the case wall body. A force is applied, the wall body needs to have a thickness that can withstand this strength, and the weight of the case increases. Furthermore, since a sealing member such as an O-ring is required, the number of parts is large and the number of assembling steps is also large. In addition, if the piping is not attached to the case wall as close as possible to a right angle, the sealing function by the sealing member cannot be fully exerted, so that higher design accuracy is required.

本発明は、上記実情に鑑みなされたもので、貫通孔を有する壁体の両側に位置する２本の配管を、貫通孔において、貫通孔と配管との芯ずれを吸収し、小スペースで的確に接続する配管接続構造とこれに用いる接続部材とを提供することを目的としている。 The present invention has been made in view of the above circumstances. Two pipes positioned on both sides of a wall body having a through hole absorb the misalignment between the through hole and the pipe in the through hole, and can be accurately obtained in a small space. It aims at providing the piping connection structure connected to this, and the connection member used for this.

本発明に係る配管接続構造は、貫通孔を有する壁体の両側に位置する２本の配管を、前記貫通孔において筒状の接続部材を介して接続する配管接続構造であって、前記接続部材は、前記２本の配管のそれぞれに嵌装される２個の把持部と、該２個の把持部を繋ぐ繋ぎ部とを有し、前記２個の把持部の一方の把持部は前記配管の一方の配管に密着的に外嵌されると共に前記貫通孔に密着的に内嵌され、且つ、他方の把持部は他方の配管に密着的に外嵌されると共に前記繋ぎ部を介し前記一方の把持部に対して径方向に変位が可能とされ、他方の把持部の外径部には締結リングが外装されていることを特徴とする。 The pipe connection structure according to the present invention is a pipe connection structure for connecting two pipes positioned on both sides of a wall body having a through hole through a cylindrical connection member in the through hole, and the connection member Has two gripping parts fitted to each of the two pipes, and a connecting part that connects the two gripping parts, and one gripping part of the two gripping parts is the pipe And the other gripping part is closely fitted to the other pipe and is connected to the one through the connecting part. The holding portion can be displaced in the radial direction, and an outer diameter portion of the other holding portion is externally provided with a fastening ring.

本発明によれば、貫通孔を有する壁体の両側に位置する２本の配管は、前記貫通孔において筒状の接続部材を介して接続される。一方の把持部は前記配管の一方の配管に密着的に外嵌されると共に前記貫通孔に密着的に内嵌されるので、貫通孔と把持部とには隙間が形成されず、貫通孔と一方の把持部との間、及び、一方の把持部と一方の配管との間が密封される。これによって、配管接続部に要するスペースがコンパクト化される。また、他方の把持部は他方の配管に密着的に外嵌されるから、他方の把持部と他方の配管との間も密封される。さらに、他方の把持部は前記繋ぎ部を介し前記一方の把持部に対して径方向に変位が可能とされているから、貫通孔の軸芯と他方の配管の軸芯とに芯ずれがあっても、この芯ずれが繋ぎ部によって吸収され、２本の配管の接続が的確になされる。従って、他方の配管と壁体との相対的位置において、高度な設計精度が求められることもない。加えて、他方の把持部の外径部には締結リングが外装されているから、他方の把持部の他方の配管に対する嵌合が強固に維持される。 According to the present invention, the two pipes positioned on both sides of the wall body having the through hole are connected to each other through the cylindrical connection member in the through hole. One gripping part is tightly fitted to one pipe of the pipe and is tightly fitted to the through hole, so that no gap is formed between the through hole and the gripping part. The space between the one grip portion and the space between the one grip portion and the one pipe are sealed. Thereby, the space required for the pipe connection portion is made compact. Further, since the other gripping part is closely fitted to the other pipe, the space between the other gripping part and the other pipe is also sealed. Further, since the other gripping portion can be displaced in the radial direction with respect to the one gripping portion via the connecting portion, there is a misalignment between the shaft core of the through hole and the shaft core of the other pipe. However, this misalignment is absorbed by the connecting portion, and the connection of the two pipes is made accurately. Therefore, high design accuracy is not required at the relative position between the other pipe and the wall. In addition, since the fastening ring is externally mounted on the outer diameter portion of the other gripping portion, the fitting of the other gripping portion to the other pipe is firmly maintained.

本発明の配管の接続構造において、前記接続部材の繋ぎ部が弾性体からなるものとしても良い。
これによれば、繋ぎ部の弾性によって、前記他方の把持部の一方の把持部に対する径方向の変位が好適になされ、繋ぎ部による前記芯ずれの吸収によって、２本の配管の接続がより的確になされる。 In the pipe connection structure of the present invention, the connecting portion of the connection member may be made of an elastic body.
According to this, due to the elasticity of the connecting portion, the radial displacement of the other holding portion with respect to the one holding portion is suitably performed, and the connection of the two pipes is more accurately connected by the absorption of the misalignment by the connecting portion. To be made.

本発明の配管接続構造において、接続部材の繋ぎ部が屈曲部を有しているものとしても良い。
これによれば、屈曲部の弾性変形によって前記把持部の径方向の変位が好適になされる。特に、繋ぎ部が弾性体からなる場合は、この弾性が相乗して径方向の変位がより好適になされる。
この場合、屈曲部が波形形状とされていても良い。これによれば、前記弾性変形がより的確になされる。 In the pipe connection structure of the present invention, the connecting portion of the connecting member may have a bent portion.
According to this, the displacement in the radial direction of the grip portion is suitably made by elastic deformation of the bent portion. In particular, when the connecting portion is made of an elastic body, this elasticity synergizes and the displacement in the radial direction is made more suitable.
In this case, the bent portion may have a wave shape. According to this, the elastic deformation is more accurately performed.

本発明の配管接続構造において、前記２個の把持部は互いに径が異なり、前記繋ぎ部はテーパ形状とされているものとしても良い。
これによれば、繋ぎ部がテーパ形状であることにより弾性変形がし易く、これによって、前記把持部の径方向の変位が好適になされる。特に、繋ぎ部が弾性体からなる場合は、この弾性が相乗して径方向の変位がより好適になされる。 In the pipe connection structure of the present invention, the two gripping portions may have different diameters, and the connecting portion may have a tapered shape.
According to this, since the connecting portion is tapered, it is easy to be elastically deformed, and thereby the displacement of the grip portion in the radial direction is suitably performed. In particular, when the connecting portion is made of an elastic body, this elasticity synergizes and the displacement in the radial direction is made more suitable.

本発明の配管接続構造において、前記一方の把持部が芯金を備えているものとしても良い。これによれば、一方の把持部が芯金を備えているから、一方の把持部が補強されると共に、一方の配管及び貫通孔に対する嵌装（外嵌及び内嵌）が強固且つ安定的になされる。 In the pipe connection structure of the present invention, the one gripping portion may include a cored bar. According to this, since one grip part is provided with the cored bar, the one grip part is reinforced, and the fitting (outer fitting and inner fitting) with respect to the one pipe and the through hole is strong and stable. Made.

本発明の配管接続構造において、前記一方の把持部の前記一方の配管に対する外嵌部及び前記貫通孔に対する内嵌部には環状リップ部が形成されているものとしても良い。これによれば、一方の把持部と一方の配管との間、及び一方の把持部と貫通孔との間に、それぞれ環状リップ部が介在し、これによって、一方の把持部と一方の配管との間、及び一方の把持部と貫通孔との間が的確に密封される。 In the pipe connection structure of the present invention, an annular lip portion may be formed on an outer fitting portion of the one gripping portion with respect to the one pipe and an inner fitting portion with respect to the through hole. According to this, the annular lip portion is interposed between the one grip portion and the one pipe, and between the one grip portion and the through hole, respectively. And between the one gripping portion and the through hole are accurately sealed.

本発明の配管接続構造において、前記他方の把持部の前記他方の配管に対する嵌装部には環状リップ部が形成されているものとしても良い。これによれば、他方の把持部と他方の配管との間に環状リップ部が介在し、これによって、他方の把持部と他方の配管との間が的確に密封される。 In the pipe connection structure of the present invention, an annular lip portion may be formed on the fitting portion of the other gripping portion with respect to the other pipe. According to this, the annular lip portion is interposed between the other gripping portion and the other pipe, and thereby, the gap between the other gripping portion and the other pipe is accurately sealed.

本発明に係る配管の接続部材は、前記いずれかの配管接続構造に用いられる筒状の接続部材であって、前記２本の配管のそれぞれに嵌装される２個の把持部と、該２個の把持部を繋ぐ弾性変形可能な繋ぎ部とを有していることを特徴とする。
これによれば、他方の把持部の一方の把持部に対する径方向の変位が弾性変形可能な繋ぎ部によってなされ、貫通孔と他方の配管とに、多少の芯ずれがあっても、コンパクト、且つ、的確に接続される。 The pipe connection member according to the present invention is a cylindrical connection member used in any one of the pipe connection structures, and includes two gripping portions fitted to each of the two pipes, It has the connection part which can be elastically deformed which connects each holding part, It is characterized by the above-mentioned.
According to this, the radial displacement of the other gripping portion with respect to one gripping portion is made by the elastically deformable connecting portion, and even if there is a slight misalignment between the through hole and the other pipe, Connected properly.

本発明の配管接続構造および接続部材によれば、貫通孔を有する壁体の両側に位置する２本の配管を、貫通孔において、貫通孔と配管との芯ずれを吸収し、小スペースで的確に接続することができる。 According to the pipe connection structure and the connection member of the present invention, two pipes positioned on both sides of a wall body having a through hole absorb the misalignment between the through hole and the pipe in the through hole, and can be accurately performed in a small space. Can be connected to.

本発明に係る配管接続構造及びこれに用いられる接続部材の第一の実施形態を示す要部の概略的断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing of the principal part which shows 1st embodiment of the piping connection structure which concerns on this invention, and the connection member used for this. 本発明に係る配管接続構造及びこれに用いられる接続部材の第二の実施形態を示す要部の概略的断面図である。It is a schematic sectional drawing of the principal part which shows 2nd embodiment of the piping connection structure which concerns on this invention, and the connection member used for this. 本発明に係る配管接続構造及びこれに用いられる接続部材の第三の実施形態を示す要部の概略的断面図である。It is a schematic sectional drawing of the principal part which shows 3rd embodiment of the piping connection structure which concerns on this invention, and the connection member used for this. 本発明に係る配管接続構造及びこれに用いられる接続部材の第四の実施形態を示す要部の概略的断面図である。It is a schematic sectional drawing of the principal part which shows 4th embodiment of the piping connection structure which concerns on this invention, and the connection member used for this. （ａ）（ｂ）（ｃ）（ｄ）は、第一〜第四の実施形態に共通する変形例を模式的に示す要部の断面図である。(A) (b) (c) (d) is sectional drawing of the principal part which shows typically the modification common to 1st-4th embodiment. （ａ）（ｂ）は、第一〜第四の実施形態に共通する別の変形例を模式的に示す要部の断面図である。(A) (b) is sectional drawing of the principal part which shows typically the another modification common to 1st-4th embodiment. （ａ）（ｂ）は、第一〜第四の実施形態に共通するさらに別の変形例を模式的に示す要部の断面図である。(A) (b) is sectional drawing of the principal part which shows the further another modification common to 1st-4th embodiment typically.

以下に、本発明の実施の形態について、図面を参照して説明する。図１は、自動車用インバータケース１における２本の配管２，３を、当該インバータケース１を構成する壁体１０に内外に連通するよう形成された貫通孔１０ａにおいて、筒状の接続部材４を介して接続する配管接続構造を示している。本実施形態において、前記２本の配管２，３のうち、一方の配管２は、インバータケース１の外部に位置し、他方の配管３は、インバータケース１の内部に配設される。接続部材４は、全体がゴム等の弾性体による筒状の成型体からなり、前記２本の配管２，３のそれぞれに嵌装される２個の把持部４１，４２と、該２個の把持部４１，４２を繋ぐ繋ぎ部４３とを有している。前記２個の把持部４１，４２の一方の把持部４１は前記一方の配管（以下、外部配管と言う）２の接続端部２０に密着的に外嵌されると共に前記貫通孔１０ａに密着的に内嵌される。また、他方の把持部４２は他方の配管（以下、内部配管と言う）３の接続端部３０に密着的に外嵌されると共に前記繋ぎ部４３を介し前記一方の把持部４１に対して径方向に変位が可能とされている。特に、繋ぎ部４３が、全体がゴム等の弾性体からなる接続部材４の一部を構成するから、繋ぎ部４３自体が弾性を保有し、これによって、他方の把持部４２の一方の把持部４１に対する径方向の変位が確実に可能とされる。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a cylindrical connecting member 4 in a through-hole 10a formed so that two pipes 2 and 3 in an inverter case 1 for an automobile communicate with a wall 10 constituting the inverter case 1 inside and outside. The piping connection structure connected via is shown. In the present embodiment, one of the two pipes 2 and 3 is located outside the inverter case 1 and the other pipe 3 is disposed inside the inverter case 1. The connection member 4 is entirely formed of a cylindrical molded body made of an elastic body such as rubber, and includes two gripping portions 41 and 42 fitted in the two pipes 2 and 3, and the two A connecting portion 43 that connects the grip portions 41 and 42 is provided. One gripping portion 41 of the two gripping portions 41 and 42 is closely fitted to the connection end 20 of the one pipe (hereinafter referred to as an external pipe) 2 and is tightly fitted to the through hole 10a. Fitted inside. Further, the other gripping portion 42 is closely fitted on the connection end 30 of the other pipe (hereinafter referred to as internal piping) 3 and has a diameter with respect to the one gripping portion 41 through the connecting portion 43. Displacement in the direction is possible. In particular, since the connecting portion 43 constitutes a part of the connecting member 4 made entirely of an elastic body such as rubber, the connecting portion 43 itself has elasticity, whereby one holding portion of the other holding portion 42 is obtained. The displacement in the radial direction with respect to 41 is reliably possible.

本実施形態では、外部配管２の接続端部２０の径が内部配管３の接続端部３０の径より大とされ、これに伴い、一方の把持部４１の径が他方の把持部４２径より大とされている。そして、両把持部４１，４２を繋ぐ繋ぎ部４３は、一方の把持部４１から他方の把持部４２に向け漸次縮径するテーパ形状とされている。繋ぎ部４３自体が保有する弾性とテーパ形状の形状特性とが相俟って、前記他方の把持部４２の一方の把持部４１に対する径方向の変位がより確実に可能とされる。内部配管３には、インバータケース１内に設置されるスイッチング素子（不図示）等の電子機器を冷却するための冷却水や冷却ガス等の冷媒が流通するように構成される。また、外部配管２は、例えば、コンバータ（不図示）に連結され、貫通孔１０ａにおいて接続部材４を介して内部配管３に接続されるように構成され、外部配管２と内部配管３との間で前記冷媒の流通が可能とされる。 In the present embodiment, the diameter of the connection end 20 of the external pipe 2 is made larger than the diameter of the connection end 30 of the internal pipe 3, and accordingly, the diameter of one gripping part 41 is larger than the diameter of the other gripping part 42. It is considered large. And the connection part 43 which connects both the holding parts 41 and 42 is made into the taper shape gradually diameter-reduced toward the other holding part 42 from the one holding part 41. As shown in FIG. The elasticity possessed by the connecting portion 43 itself and the shape characteristic of the tapered shape are combined, so that the radial displacement of the other gripping portion 42 with respect to the one gripping portion 41 can be more reliably performed. The internal pipe 3 is configured such that coolant such as cooling water or cooling gas for cooling electronic devices such as switching elements (not shown) installed in the inverter case 1 flows. The external pipe 2 is connected to, for example, a converter (not shown) and is connected to the internal pipe 3 via the connection member 4 in the through hole 10 a, and between the external pipe 2 and the internal pipe 3. Thus, the refrigerant can be circulated.

前記一方の把持部４１における外部配管２の接続端部２０に対する外嵌部（嵌合部）及び貫通孔１０ａに対する内嵌部（嵌合部）には、それぞれ、複数（図例では３個）の環状リップ部４１ａ，４１ｂが形成されている。また、他方の把持部４２における内部配管３の接続端部３０に対する外嵌部（嵌合部）には、複数（図例では３個）の環状リップ部４２ａが形成されている。これら環状リップ部４１ａ，４１ｂ，４２ａも、全体がゴム等の弾性体からなる接続部材４の一部を構成するから、弾性を保有する。環状リップ部４１ａ，４２ａは、外部配管２の接続端部２０及び内部配管３の接続端部３０の一方の把持部４１及び他方の把持部４２に対する後記するそれぞれの相対的な圧入関係において、圧入方向に倒れるように弾性的に変形し易い形状とされている。また、一方の把持部４１に形成される環状リップ部４１ｂは、ビード形状のリップ部とされている。環状リップ部４１ａの最小径は外部配管２の接続端部２０の外径より小とされ、また、環状リップ４１ｂの最大径は貫通孔１０ａの内径より大とされ、さらに、環状リップ部４２ａの最小径は内部配管３の接続端部３０の外径より小とされている。他方の把持部４２の外径部には、金属製等の締結リング４４が外装されている。外部配管２の接続端部２０には、貫通孔１０ａの径より径大のフランジ部２１が一体に形成されており、このフランジ部２１を不図示の固定具（ビス等）によって壁体１０の外側部に固着することにより外部配管２が壁体１０に固定される。 A plurality (three in the illustrated example) of outer fitting portions (fitting portions) with respect to the connection end portion 20 of the external pipe 2 and inner fitting portions (fitting portions) with respect to the through holes 10a in the one gripping portion 41 are provided. The annular lip portions 41a and 41b are formed. A plurality (three in the illustrated example) of annular lip portions 42 a are formed in the outer fitting portion (fitting portion) of the other gripping portion 42 with respect to the connection end portion 30 of the internal pipe 3. These annular lip portions 41a, 41b, and 42a also have elasticity because they constitute a part of the connecting member 4 made entirely of an elastic body such as rubber. The annular lip portions 41a and 42a are press-fitted in a relative press-fitting relationship described later with respect to one gripping portion 41 and the other gripping portion 42 of the connection end 20 of the external pipe 2 and the connection end 30 of the internal pipe 3. The shape is easily elastically deformed so as to fall in the direction. Further, the annular lip portion 41b formed on one gripping portion 41 is a bead-shaped lip portion. The minimum diameter of the annular lip portion 41a is smaller than the outer diameter of the connection end 20 of the external pipe 2, and the maximum diameter of the annular lip 41b is larger than the inner diameter of the through hole 10a. The minimum diameter is smaller than the outer diameter of the connection end 30 of the internal pipe 3. A fastening ring 44 made of metal or the like is provided on the outer diameter portion of the other gripping portion 42. A flange 21 having a diameter larger than the diameter of the through hole 10a is formed integrally with the connection end 20 of the external pipe 2, and this flange 21 is attached to the wall 10 by a fixing tool (not shown). The external pipe 2 is fixed to the wall body 10 by being fixed to the outer portion.

前記のように構成された接続部材４を用いて、２本の配管２，３を前記貫通孔１０ａにおいて接続する要領を説明する。先ず、接続部材４の他方の把持部４２を壁体１０の貫通孔１０ａに外部より挿通しながら、予めインバータケース１内に配設された内部配管３の接続端部３０に弾性的に外嵌させ、同時に、一方の把持部４１を貫通孔１０ａに弾性的に内嵌させる。この時、繋ぎ部４３が弾性を有して他方の把持部４２が一方の把持部４１に対して径方向に変位可能とされているので、貫通孔１０ａの軸芯Ｌと、内部配管３の軸芯Ｌ１とに多少の芯ずれがあっても、この芯ずれ分が繋ぎ部４３の弾性変形によって吸収される。特に、繋ぎ部４３はテーパ形状とされているから、繋ぎ部４３自体が弾性体からなることと相俟って、芯ずれ分の吸収が効果的になされる。従って、一方の把持部４１の貫通孔１０ａに対する内嵌及び他方の把持部４２の内部配管３に対する外嵌が的確になされる。次いで、外部配管２の接続端部２０を一方の把持部４１に圧入して、一方の把持部４１を外部配管２に弾性的に外嵌させる。最後に、前記フランジ部２１を、不図示の固定具によって壁体１０に固定し、２本の配管２，３の前記接続が完了する。 A procedure for connecting the two pipes 2 and 3 in the through hole 10a using the connecting member 4 configured as described above will be described. First, the other gripping portion 42 of the connection member 4 is inserted from the outside into the through hole 10a of the wall body 10 while being elastically fitted to the connection end portion 30 of the internal pipe 3 provided in the inverter case 1 in advance. At the same time, one holding portion 41 is elastically fitted into the through hole 10a. At this time, since the connecting portion 43 has elasticity and the other gripping portion 42 can be displaced in the radial direction with respect to the one gripping portion 41, the shaft core L of the through hole 10 a and the internal pipe 3 Even if there is a slight misalignment with the shaft core L 1, this misalignment is absorbed by the elastic deformation of the connecting portion 43. In particular, since the connecting portion 43 is tapered, the misalignment is effectively absorbed in combination with the connecting portion 43 itself being made of an elastic body. Accordingly, the inner fitting of the one gripping portion 41 with respect to the through hole 10a and the outer fitting of the other gripping portion 42 with respect to the internal pipe 3 are accurately performed. Next, the connection end 20 of the external pipe 2 is press-fitted into the one holding part 41, and the one holding part 41 is elastically fitted to the external pipe 2. Finally, the flange portion 21 is fixed to the wall body 10 by a fixture (not shown), and the connection of the two pipes 2 and 3 is completed.

この接続状態では、一方の把持部４１の外部配管２に対する外嵌部分、貫通孔１０ａに対する内嵌部分及び他方の把持部４２の内部配管３に対する外嵌部分には、それぞれ環状リップ部４１ａ，４１ｂ，４２ａが圧縮状態で介在される。このように、一方の把持部４１と外部配管２との嵌合部、及び他方の把持部４２と内部配管３との嵌合部に、それぞれ環状リップ部４１ａ，４２ａが圧縮状態で介在されることによって、各嵌合部が密着的な嵌合状態とされる。これによって、外部配管２と内部配管３との間を、前記冷媒が接続部材４を介して水密的或は気密的に流通可能とされる。また、一方の把持部４１と貫通孔１０ａとの間に環状リップ部４１ｂが圧縮状態で介在することによって、貫通孔１０ａを通じたインバータケース１の内外が密封され、貫通孔１０ａを通じて外部から塵埃等がインバータケース１内に侵入することが防止される。 In this connection state, the annular lip portions 41a and 41b are respectively provided on the outer fitting portion of the one holding portion 41 with respect to the external pipe 2, the inner fitting portion with respect to the through hole 10a, and the outer fitting portion of the other holding portion 42 with respect to the inner piping 3. , 42a are interposed in a compressed state. In this way, the annular lip portions 41a and 42a are interposed in the compressed state in the fitting portion between the one gripping portion 41 and the external pipe 2 and the fitting portion between the other gripping portion 42 and the internal piping 3, respectively. Thus, each fitting portion is brought into a close fitting state. As a result, the refrigerant can flow between the external pipe 2 and the internal pipe 3 in a watertight or airtight manner via the connecting member 4. Further, the annular lip portion 41b is interposed in a compressed state between the one gripping portion 41 and the through hole 10a, whereby the inside and outside of the inverter case 1 through the through hole 10a is sealed, and dust or the like is externally transmitted through the through hole 10a. Is prevented from entering the inverter case 1.

環状リップ部４１ａ，４２ａは、前記のように、外部配管２の接続端部２０及び内部配管３の接続端部３０の一方の把持部４１及び他方の把持部４２に対するそれぞれの相対的圧入方向に倒れるように弾性的に変形し易い形状とされている。これによって、各配管２，３の接続部材４に対する接続がし易くなり、一方、抜出し方向では環状リップ部４１ａ，４２ａの先端部が相手部材に対してカウンター気味に作用して抵抗が大きくなり、抜出しが抑制され接続状態が安定する。また、環状リップ部４１ａ，４２ａの弾性的変形に伴う弾性反力によって、前記密着的な嵌合関係が確実になされる。さらに、他方の把持部４２の外径部には、前記締結リング４４が外装されているので、他方の把持部４２の内部配管３に対する嵌合が強固に維持される。加えて、環状リップ部４１ｂがビード形状とされていることにより、一方の把持部４１と貫通孔１０ａとの嵌合強度が大となると共に、この嵌合部の気密性も的確に維持され、外部からインバータケース１内への塵埃等の侵入防止がなされる。
なお、図１において、環状リップ部４１ａ，４１ｂ，４２ａは、便宜上、変形前の原形状であることを示しているが、実際の前記接続状態では、相手部材の形状に沿って弾性変形して、各嵌合部に各相手部材との径差分だけ圧縮された状態で介在する。 As described above, the annular lip portions 41a and 42a are in the relative press-fitting directions with respect to the one gripping portion 41 and the other gripping portion 42 of the connection end portion 20 of the external pipe 2 and the connection end portion 30 of the internal pipe 3. The shape is easily elastically deformed so as to fall down. This makes it easy to connect the pipes 2 and 3 to the connecting member 4, while the leading ends of the annular lip portions 41 a and 42 a act counter to the other member in the pulling direction, increasing the resistance, Pull-out is suppressed and the connection state is stabilized. Further, the close fitting relationship is ensured by the elastic reaction force accompanying the elastic deformation of the annular lip portions 41a and 42a. Furthermore, since the fastening ring 44 is externally mounted on the outer diameter portion of the other gripping portion 42, the fitting of the other gripping portion 42 to the internal pipe 3 is firmly maintained. In addition, since the annular lip portion 41b has a bead shape, the fitting strength between the one gripping portion 41 and the through hole 10a is increased, and the airtightness of the fitting portion is accurately maintained, Intrusion of dust or the like into the inverter case 1 from the outside is prevented.
In FIG. 1, for convenience, the annular lip portions 41a, 41b, and 42a are shown to have an original shape before deformation. However, in the actual connection state, the annular lip portions 41a, 41b, and 42a are elastically deformed along the shape of the mating member. In each of the fitting portions, it is interposed in a compressed state by a difference in diameter with each mating member.

本実施形態の配管接続構造においては、繋ぎ部４３によって、貫通孔１０ａと内部配管３との位置ずれが吸収されるから、接続部材４と貫通孔１０ａとの間に芯ずれを吸収するための隙間を確保する必要がなく、インバータケース１のコンパクト化に寄与する。また、外部配管２はフランジ部２１を介して壁体１０に固定されるが、フランジ部２１と壁体１０との間にシール部材等を介在させる必要がないから、壁体１０をシール反力に耐え得る厚みとする必要もなく、インバータケース１の軽量化にも寄与する。さらに、Ｏリング等のシール部材が不要とされるため、部品点数が少なく、組付け工数も増大することがない。加えて、外部配管２のフランジ部２１と、壁体１０との固定部位をシールする必要がないから、外部配管２を壁体１０に対して限りなく直角に近い状態で取付ける必要もなく、この部分の設計精度の高度化が求められることもない。 In the pipe connection structure of the present embodiment, the connecting portion 43 absorbs misalignment between the through hole 10a and the internal pipe 3, and therefore absorbs misalignment between the connection member 4 and the through hole 10a. There is no need to secure a gap, which contributes to the compactness of the inverter case 1. Further, although the external pipe 2 is fixed to the wall body 10 via the flange portion 21, there is no need to interpose a seal member or the like between the flange portion 21 and the wall body 10. Therefore, the thickness of the inverter case 1 can be reduced. Furthermore, since a sealing member such as an O-ring is not required, the number of parts is small and the number of assembling steps does not increase. In addition, since it is not necessary to seal the fixing portion between the flange portion 21 of the external pipe 2 and the wall body 10, it is not necessary to attach the external pipe 2 to the wall body 10 in an almost nearly right angle. There is no need to improve the design accuracy of the parts.

図２は、本発明に係る配管接続構造及びこれに用いられる接続部材の第二の実施形態を示す。本実施形態も、自動車用インバータケース１における２本の配管２，３を、当該インバータケース１を構成する壁体１０に形成された貫通孔１０ａにおいて、接続部材４を介して接続する配管接続構造を示している。そして、接続部材４も、前記例と同様に、全体がゴム等の弾性体による成型体からなり、一方の把持部４１と、他方の把持部４２と、両把持部４１，４２を繋ぐ繋ぎ部４３とを有している。しかし、本実施形態では、内部配管３が一方の配管とされ、接続部材４の一方の把持部４１は内部配管３の接続端部３０に密着的に外嵌されると共に前記貫通孔１０ａに密着的に内嵌される。また、外部配管２は他方の配管とされ、接続部材４の他方の把持部４２は外部配管２の接続端部２０に密着的に嵌装（本実施形態では外嵌）されると共に前記繋ぎ部４３を介し前記一方の把持部４１に対して径方向に変位が可能とされている。さらに、内部配管３の接続端部３０の径が外部配管２の接続端部２０の径より大とされ、これに伴い、繋ぎ部４３は、一方の把持部４１から他方の把持部４２に向け漸次縮径するテーパ形状とされている。内部配管３の接続端部３０には、貫通孔１０ａより径大のフランジ部３１が一体に形成されており、このフランジ部３１を介し、不図示の固定具（ビス等）によって、内部配管３が壁体１０の内側部に固定される。そして、接続部材４には、環状リップ部４１ａ，４１ｂ，４２ａが前記と同様に形成され、また、他方の把持部４２の外径部には、金属製等の締結リング４４が外装されている。 FIG. 2 shows a second embodiment of a pipe connection structure according to the present invention and a connection member used therefor. Also in this embodiment, a pipe connection structure in which two pipes 2 and 3 in the inverter case 1 for an automobile are connected via a connecting member 4 in a through hole 10a formed in the wall body 10 constituting the inverter case 1. Is shown. Similarly to the above example, the connection member 4 is also made of a molded body made of an elastic body such as rubber, and has one gripping portion 41, the other gripping portion 42, and a connecting portion that connects both gripping portions 41, 42. 43. However, in the present embodiment, the internal pipe 3 is one pipe, and the one gripping portion 41 of the connection member 4 is tightly fitted to the connection end 30 of the internal pipe 3 and is in close contact with the through hole 10a. Is fitted internally. The external pipe 2 is the other pipe, and the other gripping portion 42 of the connection member 4 is closely fitted (externally fitted in the present embodiment) to the connection end 20 of the external pipe 2 and the connecting portion. A displacement in the radial direction is possible with respect to the one gripping portion 41 via 43. Further, the diameter of the connection end 30 of the internal pipe 3 is made larger than the diameter of the connection end 20 of the external pipe 2, and accordingly, the connecting portion 43 is directed from one gripping portion 41 to the other gripping portion 42. The taper shape gradually decreases in diameter. A flange 31 having a diameter larger than that of the through hole 10a is integrally formed at the connection end 30 of the internal pipe 3, and the internal pipe 3 is connected to the internal pipe 3 by a fixing tool (such as a screw) (not shown). Is fixed to the inner side of the wall 10. The connecting member 4 is formed with annular lip portions 41a, 41b and 42a in the same manner as described above, and a metal or other fastening ring 44 is externally provided on the outer diameter portion of the other gripping portion 42. .

本実施形態の接続部材４を用いて、２本の配管２，３を前記貫通孔１０ａにおいて接続する要領を説明する。先ず、一方の把持部４１を、予めフランジ部３１を介して壁体１０の内側部に固定された内部配管３の接続端部３０に弾性的に外嵌させ、同時に、貫通孔１０ａに弾性的に内嵌させる。次いで、外部配管２の接続端部２０を他方の把持部４２に圧入し、他方の把持部４２を外部配管２の接続端部２０に弾性的に外嵌させ、これによって、外部配管２及び内部配管３の接続部材４を介した貫通孔１０ａにおける接続が完了する。この接続状態においても、繋ぎ部４３が弾性を有して他方の把持部４２が一方の把持部４１に対して径方向に変位可能とされているので、貫通孔１０ａの軸芯Ｌと、外部配管２の軸芯Ｌ２とに多少の芯ずれがあっても、この芯ずれ分が繋ぎ部４３によって吸収される。特に、繋ぎ部４３はテーパ形状とされているから、芯ずれ分の吸収が効果的になされる。従って、本実施形態においても、接続部材４と貫通孔１０ａとに芯ずれを吸収するための隙間を確保する必要がなく、インバータケース１のコンパクト化に寄与する。また、内部配管３はフランジ部３１を介して壁体１０に固定されるが、フランジ部３１と壁体１０との間にシール部材等を介在させる必要がないから、壁体１０をシール反力に耐え得る厚みとする必要もなく、インバータケース１の軽量化にも寄与する。さらに、環状リップ部４１ａ，４１ｂ，４２ａ、及び締結リング４４による前記作用・効果も前記と同様に発揮される。その他の構成は、第一の実施形態と同様であるので、共通部分に同一の符号を付し、その構成及び作用・効果等の説明を省略する。 A procedure for connecting the two pipes 2 and 3 in the through hole 10a using the connection member 4 of the present embodiment will be described. First, one gripping portion 41 is elastically fitted to the connection end 30 of the internal pipe 3 fixed to the inner side of the wall body 10 via the flange portion 31 in advance, and at the same time, elastically fits into the through hole 10a. Fit inside. Next, the connection end 20 of the external pipe 2 is press-fitted into the other gripping part 42, and the other gripping part 42 is elastically fitted to the connection end 20 of the external pipe 2, whereby the external pipe 2 and the internal pipe The connection in the through hole 10a through the connection member 4 of the pipe 3 is completed. Even in this connected state, since the connecting portion 43 has elasticity and the other gripping portion 42 can be displaced in the radial direction with respect to the one gripping portion 41, the shaft core L of the through-hole 10a and the outside Even if there is a slight misalignment with the axis L2 of the pipe 2, this misalignment is absorbed by the connecting portion 43. In particular, since the connecting portion 43 has a tapered shape, the misalignment is effectively absorbed. Therefore, also in this embodiment, it is not necessary to secure a gap for absorbing the misalignment between the connecting member 4 and the through hole 10a, which contributes to the compactness of the inverter case 1. In addition, the internal pipe 3 is fixed to the wall body 10 via the flange portion 31, but there is no need to interpose a seal member or the like between the flange portion 31 and the wall body 10. Therefore, the thickness of the inverter case 1 can be reduced. Furthermore, the above-mentioned action and effect by the annular lip portions 41a, 41b, 42a and the fastening ring 44 are also exhibited as described above. Since other configurations are the same as those of the first embodiment, common portions are denoted by the same reference numerals, and descriptions of the configurations, operations, effects, and the like are omitted.

図３は、本発明に係る配管接続構造及びこれに用いられる接続部材の第三の実施形態を示す。本実施形態も、自動車用インバータケース１における２本の配管２，３を、当該インバータケース１を構成する壁体１０に形成された貫通孔１０ａにおいて、接続部材４を介して接続する配管接続構造を示している。接続部材４も、前記例と同様に、全体がゴム等の弾性体による成型体からなり、一方の把持部４１と、他方の把持部４２と、両把持部４１，４２を繋ぐ繋ぎ部４３とを有している。しかし、本実施形態では、接続部材４を構成する一方の把持部４１が、環状の芯金４５を備えている点で、前記第一及び第二の実施形態と異なる。芯金４５は、一方の把持部４１の厚み内に埋設されているが、芯金４５の一部は外向鍔状部４５ａとして一方の把持部４１から露出している。貫通孔１０ａにおける外側開口部は径大化されて段差部１０ｂとされ、一方の把持部４１が貫通孔１０ａに内嵌された際、この外向鍔状部４５ａが段差部１０ｂに当止するようになされている。このように、芯金４５が一方の把持部４１から露出する外向鍔状部４５ａを有していると、一方の把持部４１を貫通孔１０ａに圧入させる際、外向鍔状部４５ａに圧入工具を当てがうようにして操作することができ、一方の把持部４１を損耗させる懸念がない。また、図例では、外向鍔状部４５ａ及びその周辺の一方の把持部４１が段差部１０ｂによる空所に収容され、フランジ部２１に非接触の状態とされている。即ち、フランジ部２１と段差部１０ｂとの間に一方の把持部４１の一部が圧縮状態で介在されることがなく、これによって、圧縮反力が壁体１０に作用せず、壁体１０を圧縮反力に抗し得る厚みとする必要がない。そして、接続部材４には、環状リップ部４１ａ，４１ｂ，４２ａが前記と同様に形成され、また、他方の把持部４２の外径部には、金属製等の締結リング４４が外装されている。 FIG. 3 shows a third embodiment of a pipe connection structure according to the present invention and a connection member used therefor. Also in this embodiment, a pipe connection structure in which two pipes 2 and 3 in the inverter case 1 for an automobile are connected via a connecting member 4 in a through hole 10a formed in the wall body 10 constituting the inverter case 1. Is shown. Similarly to the above example, the connecting member 4 is entirely formed of a molded body made of an elastic body such as rubber, and includes one gripping portion 41, the other gripping portion 42, and a connecting portion 43 that connects both gripping portions 41 and 42. have. However, this embodiment is different from the first and second embodiments in that one holding portion 41 constituting the connection member 4 includes an annular cored bar 45. The cored bar 45 is embedded within the thickness of one gripping part 41, but a part of the cored bar 45 is exposed from the one gripping part 41 as an outward hook-shaped part 45 a. The outer opening of the through-hole 10a is enlarged to form a stepped portion 10b. When one gripping portion 41 is fitted in the through-hole 10a, the outward flange 45a is brought into contact with the stepped portion 10b. Has been made. Thus, when the metal core 45 has the outward hook-like portion 45a exposed from the one gripping portion 41, when the one gripping portion 41 is press-fitted into the through hole 10a, the press-fit tool is inserted into the outward hook-like portion 45a. Can be operated so as to be applied, and there is no fear of damaging one gripping portion 41. Further, in the illustrated example, the outward saddle-like portion 45a and one of the surrounding gripping portions 41 are accommodated in a space formed by the step portion 10b and are not in contact with the flange portion 21. That is, a part of one gripping portion 41 is not interposed in a compressed state between the flange portion 21 and the stepped portion 10b, whereby the compression reaction force does not act on the wall body 10 and the wall body 10 Is not required to have a thickness that can resist the compression reaction force. The connecting member 4 is formed with annular lip portions 41a, 41b and 42a in the same manner as described above, and a metal or other fastening ring 44 is externally provided on the outer diameter portion of the other gripping portion 42. .

このように、接続部材４が、芯金４５を備えていることにより、一方の把持部４１の形状保持性が維持されると共に、一方の把持部４１と外部配管２及び貫通孔１０ａとの嵌合が、強硬になされる。そして、芯金４５は繋ぎ部４３には及ばないので、繋ぎ部４３は芯金４５の影響を受けずに弾性を保有する。従って、前記と同様に、他方の把持部４２の一方の把持部４１に対する径方向の変位が可能とされ、貫通孔１０ａの軸芯Ｌと、内部配管３の軸芯Ｌ１とに多少の芯ずれがあっても、この芯ずれ分が繋ぎ部４３によって吸収される。特に、繋ぎ部４３はテーパ形状とされているから、芯ずれ分の吸収が効果的になされる。さらに、環状リップ部４１ａ，４１ｂ，４２ａ、及び締結リング４４による前記作用・効果も前記と同様に発揮される。
その他の構成は、第一の実施形態と同様であるので、共通部分に同一の符号を付し、その構成及び作用・効果等の説明を省略する。なお、図３では、図１に示す例と同様に、外部配管２が一方の配管、内部配管３が他方の配管とされているが、第二の実施形態と同様に、外部配管２が他方の配管、内部配管３が一方の配管とされる場合にも、本実施形態が適用可能である。 As described above, since the connecting member 4 includes the cored bar 45, the shape retaining property of the one gripping portion 41 is maintained, and the fitting of the one gripping portion 41 with the external pipe 2 and the through hole 10a is maintained. The match is made hard. Since the cored bar 45 does not reach the connecting part 43, the connecting part 43 retains elasticity without being affected by the cored bar 45. Accordingly, in the same manner as described above, it is possible to displace the other gripping portion 42 in the radial direction with respect to the one gripping portion 41, and there is a slight misalignment between the shaft core L of the through hole 10a and the shaft core L1 of the internal pipe 3. Even if there is, the misalignment is absorbed by the connecting portion 43. In particular, since the connecting portion 43 has a tapered shape, the misalignment is effectively absorbed. Furthermore, the above-mentioned action and effect by the annular lip portions 41a, 41b, 42a and the fastening ring 44 are also exhibited as described above.
Since other configurations are the same as those of the first embodiment, common portions are denoted by the same reference numerals, and descriptions of the configurations, operations, effects, and the like are omitted. In FIG. 3, as in the example shown in FIG. 1, the external pipe 2 is one pipe and the internal pipe 3 is the other pipe. However, as in the second embodiment, the external pipe 2 is the other pipe. The present embodiment can also be applied to the case where the internal pipe 3 and the internal pipe 3 are one pipe.

図４は、本発明に係る配管接続構造及びこれに用いられる接続部材の第四の実施形態を示す。本実施形態も、自動車用インバータケース１における２本の配管２，３を、当該インバータケース１を構成する壁体１０に形成された貫通孔１０ａにおいて、接続部材４を介して接続する配管接続構造を示している。接続部材４も、前記例と同様に、全体がゴム等の弾性体による成型体からなり、一方の把持部４１と、他方の把持部４２と、両把持部４１，４２を繋ぐ繋ぎ部４３とを有している。しかし、本実施形態では、接続部材４を構成する繋ぎ部４３が、波形形状の屈曲部４３ａを有している点で、前記各実施形態と異なる。図例の波形形状は一つの波形からなる形状であるが、複数の波形が繰り返す蛇腹形状であっても良い。また、図例では、外部配管２の接続端部２０と内部配管３の接続端部３０とが同径、即ち、一方の把持部４１と他方の把持部４２とが同径であるが、これらは互いに異径であっても良い。このように、繋ぎ部４３が屈曲部４３ａを有していることにより、他方の把持部４２の一方の把持部４１に対する径方向の変位がより効果的に発揮され、貫通孔１０ａの軸芯Ｌと、内部配管３の軸芯Ｌ１とに多少の芯ずれがあっても、この芯ずれ分が繋ぎ部４３によって吸収される。特に、屈曲部４３ａが波形形状とされているから、その形状的特性が相乗して、芯ずれ分の吸収が効果的になされる。
その他の構成は、第一の実施形態と同様であるので、共通部分に同一の符号を付し、その構成及び作用・効果等の説明を省略する。なお、図４では、図１に示す例と同様に、外部配管２が一方の配管、内部配管３が他方の配管とされているが、第二の実施形態と同様に、外部配管２が他方の配管、内部配管３が一方の配管とされている場合にも、本実施形態が適用可能である。さらに、第三の実施形態と同様に、接続部材４の一方の把持部４１が芯金４５を備えているものであっても良い。 FIG. 4 shows a fourth embodiment of a pipe connection structure according to the present invention and a connection member used therefor. Also in this embodiment, a pipe connection structure in which two pipes 2 and 3 in the inverter case 1 for an automobile are connected via a connecting member 4 in a through hole 10a formed in the wall body 10 constituting the inverter case 1. Is shown. Similarly to the above example, the connecting member 4 is entirely formed of a molded body made of an elastic body such as rubber, and includes one gripping portion 41, the other gripping portion 42, and a connecting portion 43 that connects both gripping portions 41 and 42. have. However, in this embodiment, the connection part 43 which comprises the connection member 4 differs from the said each embodiment by the point which has the waveform-shaped bending part 43a. The waveform shape in the example is a shape composed of one waveform, but may be a bellows shape in which a plurality of waveforms are repeated. Further, in the illustrated example, the connection end 20 of the external pipe 2 and the connection end 30 of the internal pipe 3 have the same diameter, that is, one grip 41 and the other grip 42 have the same diameter. May have different diameters. Thus, since the connecting portion 43 has the bent portion 43a, the radial displacement of the other gripping portion 42 with respect to the one gripping portion 41 is more effectively exhibited, and the axial center L of the through hole 10a. Even if there is a slight misalignment between the axial center L 1 of the internal pipe 3, this misalignment is absorbed by the connecting portion 43. In particular, since the bent portion 43a has a corrugated shape, the shape characteristics of the bent portion 43a are synergistic to effectively absorb the misalignment.
Since other configurations are the same as those of the first embodiment, common portions are denoted by the same reference numerals, and descriptions of the configurations, operations, effects, and the like are omitted. In FIG. 4, as in the example shown in FIG. 1, the external pipe 2 is one pipe and the internal pipe 3 is the other pipe. However, as in the second embodiment, the external pipe 2 is the other pipe. The present embodiment can also be applied to the case where the pipe and the internal pipe 3 are one pipe. Furthermore, as in the third embodiment, one gripping portion 41 of the connection member 4 may include a cored bar 45.

図５〜図７は、それぞれ、第一〜第四の実施形態に共通する変形例、別の変形例及びさらに別の変形例を模式的に示すものである。図５〜図７では、環状リップ部４１ａ，４１ｂ，４２ａの図示を省略している。
図５（ａ）（ｂ）（ｃ）（ｄ）に示す例は、第一の実施形態（図１）と同様に、外部配管２が一方の配管とされ、内部配管３が他方の配管とされている。これらの例は、いずれも外部配管２の接続端部２０の径が内部配管３の接続端部３０の径より大、即ち、一方の把持部４１の径が他方の把持部４２の径より大であり、繋ぎ部４３が、一方の把持部４１から他方の把持部４２に向け漸次縮径するテーパ形状とされている点で共通する。さらに、他方の把持部４２の外径部には、前記例と同様に締結リング４４が外装されている。そして、（ａ）〜（ｄ）は、外部配管２と一方の把持部４１、一方の把持部４１と貫通孔１０ａ、内部配管３と他方の把持部４２、のそれぞれにおける嵌合態様の違いを示している。 5 to 7 schematically show a modification, another modification, and still another modification common to the first to fourth embodiments, respectively. 5-7, illustration of the annular lip portions 41a, 41b, 42a is omitted.
In the example shown in FIGS. 5A, 5B, 5C, and 5D, similarly to the first embodiment (FIG. 1), the external pipe 2 is one pipe, and the internal pipe 3 is the other pipe. Has been. In any of these examples, the diameter of the connection end 20 of the external pipe 2 is larger than the diameter of the connection end 30 of the internal pipe 3, that is, the diameter of one gripping portion 41 is larger than the diameter of the other gripping portion 42. The connecting portion 43 is common in that the diameter gradually decreases from one gripping portion 41 to the other gripping portion 42. Further, a fastening ring 44 is externally mounted on the outer diameter portion of the other grip portion 42 as in the above example. And (a)-(d) shows the difference of the fitting mode in each of the external piping 2 and the one gripping portion 41, the one gripping portion 41 and the through hole 10a, and the internal piping 3 and the other gripping portion 42. Show.

図５における（ａ）は、外部配管２の接続端部と一方の把持部４１との嵌合部の長さが、一方の把持部４１と貫通孔１０ａとの嵌合部の長さより短いことを示している。さらに、２点鎖線部は、他方の把持部４２より内部配管３の接続端部３０が壁体１０側に突出している場合を示す。（ｂ）は、外部配管２の接続端部２０と一方の把持部４１との嵌合部の長さが貫通孔１０ａの軸芯Ｌに沿った長さ（壁体１０の厚み）より小さいことを示している。（ｃ）は、外部配管２の接続端部２０と一方の把持部４１との嵌合部の長さが貫通孔１０ａの長さ（同上）より大きいことを示している。さらに、（ｄ）は、外部配管２の接続端部２０と一方の把持部４１との嵌合部の長さが、一方の把持部４１と貫通孔１０ａとの嵌合部の長さが同一であるが、一方の把持部４１の長さがこれら嵌合部の長さより大であることを示している。これらの嵌合態様の違いは、インバータケース１内での不図示の機器及び内部配管２の配置レイアウトの関係や、設計公差等によって不可避的に生じる場合が考えられる。このような嵌合態様の違いによっても、弾性体からなるテーパ形状の繋ぎ部４３の存在によって、貫通孔１０ａの軸芯Ｌと、内部配管２の軸芯Ｌ１との芯ずれが吸収され、貫通孔１０ａにおける外部配管２と内部配管３との接続部材４を介した接続が的確になされる。特に、このような嵌合態様の違いが生じる場合でも、（ａ）〜（ｄ）に示すように繋ぎ部４３が各嵌合部に関与しないように、即ち、繋ぎ部４３の一部が嵌合部に介在しないように設計することによって、繋ぎ部４３の斯かる機能を充分に発揮させることができる。 5A, the length of the fitting portion between the connection end of the external pipe 2 and the one gripping portion 41 is shorter than the length of the fitting portion between the one gripping portion 41 and the through hole 10a. Is shown. Furthermore, a two-dot chain line part shows the case where the connection end part 30 of the internal piping 3 protrudes from the other grip part 42 to the wall body 10 side. In (b), the length of the fitting portion between the connection end 20 of the external pipe 2 and the one gripping portion 41 is smaller than the length along the axis L of the through hole 10a (the thickness of the wall body 10). Is shown. (C) has shown that the length of the fitting part of the connection end part 20 of the external piping 2 and one holding part 41 is larger than the length (same as above) of the through-hole 10a. Furthermore, (d) shows that the length of the fitting portion between the connection end 20 of the external pipe 2 and the one gripping portion 41 is the same as the length of the fitting portion between the one gripping portion 41 and the through hole 10a. However, it is shown that the length of one grip part 41 is larger than the length of these fitting parts. The difference in these fitting modes may be inevitably caused by the relationship between the layout of the equipment (not shown) and the internal piping 2 in the inverter case 1, the design tolerance, and the like. Even with such a difference in the fitting mode, the presence of the taper-shaped connecting portion 43 made of an elastic body absorbs the misalignment between the shaft core L of the through hole 10a and the shaft core L1 of the internal pipe 2, thereby penetrating. The connection between the external pipe 2 and the internal pipe 3 through the connection member 4 in the hole 10a is made accurately. In particular, even when such a difference in fitting mode occurs, as shown in (a) to (d), the connecting portion 43 is not involved in each fitting portion, that is, a part of the connecting portion 43 is fitted. By designing so that it does not intervene in a joint part, the function of the connection part 43 can fully be exhibited.

なお、図５（ａ）〜（ｄ）に示すような嵌合態様は、第二の実施形態（図２）のように、外部配管２が他方の配管とされ、内部配管３が一方の配管とされている場合でもあり得ることであり、接続部材４の形状を、嵌合態様に合せて設計することによって、同様の機能を発揮させることができる。また、第三の実施形態（図３）のように、一方の把持部４１が芯金４５を備えている場合も、図５（ａ）〜（ｄ）に示すような嵌合態様の違いにも対応し得るものとすることができる。 In addition, in the fitting mode as shown in FIGS. 5A to 5D, the external pipe 2 is the other pipe and the internal pipe 3 is the one pipe as in the second embodiment (FIG. 2). The same function can be exhibited by designing the shape of the connecting member 4 in accordance with the fitting mode. Further, as in the third embodiment (FIG. 3), even when one gripping portion 41 includes a cored bar 45, the difference in fitting mode as shown in FIGS. 5 (a) to (d). Can also be supported.

図６（ａ）（ｂ）に示す例は、いずれも、外部配管２の接続端部２０の径が内部配管３の接続端部３０の径より小さいことで共通する。（ａ）に示す例は、第一の実施形態（図１）と同様に、外部配管２が一方の配管であり、内部配管３が他方の配管であることを示している。この例では、一方の把持部４１が他方の把持部４２より径が小であり、両把持部４１，４２を繋ぐ繋ぎ部４３が、一方の把持部４１から他方の把持部４２に向け漸次拡径するテーパ形状とされている。また、（ｂ）に示す例は、第二の実施形態（図２）と同様に、外部配管２が他方の配管であり、内部配管３が一方の配管であることを示している。この例では、一方の把持部４１が他方の把持部４２より径が大であり、両把持部４１，４２を繋ぐ繋ぎ部４３が、一方の把持部４１から他方の把持部４２に向け漸次縮径するテーパ形状とされている。そして、（ａ）に示す例では、外部配管２の接続端部２０と一方の把持部４１との嵌合部の長さが貫通孔１０ａの長さ（同上）と同じとされている。また、（ｂ）に示す例では、内部配管３の接続端部３０と一方の把持部４１との嵌合部の長さが貫通孔１０ａの長さ（同上）より小とされている。さらに、他方の把持部４２の外径部には、前記例と同様に締結リング４４が外装されている。 The examples shown in FIGS. 6A and 6B are common in that the diameter of the connection end 20 of the external pipe 2 is smaller than the diameter of the connection end 30 of the internal pipe 3. The example shown to (a) has shown that the external piping 2 is one piping and the internal piping 3 is the other piping similarly to 1st embodiment (FIG. 1). In this example, one gripping portion 41 has a smaller diameter than the other gripping portion 42, and the connecting portion 43 that connects both gripping portions 41, 42 gradually expands from one gripping portion 41 toward the other gripping portion 42. The taper shape is a diameter. Moreover, the example shown to (b) has shown that the external piping 2 is the other piping and the internal piping 3 is one piping like 2nd embodiment (FIG. 2). In this example, one gripping portion 41 has a larger diameter than the other gripping portion 42, and the connecting portion 43 that connects both gripping portions 41, 42 gradually shrinks from one gripping portion 41 toward the other gripping portion 42. The taper shape is a diameter. And in the example shown to (a), the length of the fitting part of the connection end part 20 of the external piping 2 and one holding part 41 is made the same as the length (same as above) of the through-hole 10a. In the example shown in (b), the length of the fitting portion between the connection end 30 of the internal pipe 3 and the one gripping portion 41 is made shorter than the length of the through hole 10a (same as above). Further, a fastening ring 44 is externally mounted on the outer diameter portion of the other grip portion 42 as in the above example.

これらの例においても、（ａ）の例では、貫通孔１０ａの軸芯Ｌと、内部配管３の軸芯Ｌ１との芯ずれが繋ぎ部４３によって吸収され、（ｂ）の例では、貫通孔１０ａの軸芯Ｌと、外部配管２の軸芯Ｌ２との芯ずれが繋ぎ部４３によって吸収される。これによって、貫通孔１０ａにおける外部配管２と内部配管３との接続部材４を介した接続が、前記例と同様に的確になされる。
なお、第三の実施形態（図３）のように、接続部材４における一方の把持部４１が芯金４５を備えている場合も、図６（ａ）（ｂ）に示すような嵌合態様の違いに対応し得るものとすることができる。 Also in these examples, in the example of (a), misalignment between the axis L of the through hole 10a and the axis L1 of the internal pipe 3 is absorbed by the connecting portion 43, and in the example of (b), the through hole The misalignment between the axis L of 10a and the axis L2 of the external pipe 2 is absorbed by the connecting portion 43. Thereby, the connection through the connecting member 4 between the external pipe 2 and the internal pipe 3 in the through-hole 10a is made exactly as in the above example.
Note that, as in the third embodiment (FIG. 3), even when one gripping portion 41 of the connecting member 4 includes a cored bar 45, the fitting mode as shown in FIGS. 6 (a) and 6 (b). It is possible to cope with the difference.

図７（ａ）（ｂ）は、第一〜第四の実施形態に共通するさらに別の変形例を模式的に示すものである。これらの例は、いずれも、外部配管２の接続端部２０の径と内部配管３の接続端部３０の径とが同一、即ち、一方の把持部４１の径と他方の把持部４２の径とが同一である点で共通する。さらに、他方の把持部４２の外径部には、前記例と同様に締結リング４４が外装されている。また、図７（ａ）（ｂ）では、外部配管２が一方の配管、内部配管３が他方の配管とされているが、これらが、第二の実施形態（図２）のように逆であっても良い。（ａ）に示す例では、繋ぎ部４３が、一方の把持部４１及び他方の把持部４２と同径の直状体からなる。繋ぎ部４３は、直状体からなるが、弾性を保有しているので、他方の把持部４２が一方の把持部４１に対して変位が可能とされる。従って、前記例と同様に、貫通孔１０ａの軸芯Ｌと、内部配管３の軸芯Ｌ１とに多少の芯ずれがあっても、これらの芯ずれが吸収され、貫通孔１０ａにおける外部配管２と内部配管３との接続部材４を介した接続が的確になされる。また、（ｂ）に示す例では、繋ぎ部４３が径小部からなる屈曲部４３ｂを備えている。この屈曲部４３ｂは、一方の把持部４１に近接し、他方の把持部４２に向け漸次拡径するテーパ形状をなすように他方の把持部４２に連なっている。このような繋ぎ部４３は、屈曲部４３ｂによる形状的特性が相乗した弾性によって、他方の把持部４２の一方の把持部４１に対する径方向の変位がよりし易くなる。従って、前記例と同様に、貫通孔１０ａの軸芯Ｌと、内部配管３の軸芯Ｌ１とに多少の芯ずれがあっても、これらの芯ずれが吸収され、貫通孔１０ａにおける外部配管２と内部配管３との接続部材４を介した接続が的確になされる。
なお、図７（ｂ）に示す例においては、屈曲部４３ｂが、繋ぎ部４３の中間部辺りに設けられた形態であっても良い。また、第三の実施形態（図３）のように、一方の把持部４１が芯金４５を備えている場合も、図７（ａ）（ｂ）に示すような嵌合態様の違いに対応し得るものとすることができる。 FIGS. 7A and 7B schematically show still another modification example common to the first to fourth embodiments. In any of these examples, the diameter of the connection end 20 of the external pipe 2 and the diameter of the connection end 30 of the internal pipe 3 are the same, that is, the diameter of one grip 41 and the diameter of the other grip 42. And are common in that they are the same. Further, a fastening ring 44 is externally mounted on the outer diameter portion of the other grip portion 42 as in the above example. 7 (a) and 7 (b), the external pipe 2 is one pipe and the internal pipe 3 is the other pipe. However, these are reversed as in the second embodiment (FIG. 2). There may be. In the example shown to (a), the connection part 43 consists of a linear body of the same diameter as the one holding part 41 and the other holding part 42. FIG. The connecting portion 43 is formed of a straight body, but has elasticity, so that the other gripping portion 42 can be displaced with respect to the one gripping portion 41. Therefore, as in the above example, even if there is a slight misalignment between the shaft core L of the through hole 10a and the shaft core L1 of the internal pipe 3, these misalignments are absorbed and the external pipe 2 in the through hole 10a is absorbed. And the internal pipe 3 through the connection member 4 are made accurately. Moreover, in the example shown in (b), the connection part 43 is provided with the bending part 43b which consists of a small diameter part. The bent portion 43b is adjacent to the one gripping portion 41 and continues to the other gripping portion 42 so as to form a tapered shape that gradually increases in diameter toward the other gripping portion 42. Such a connecting portion 43 is more easily displaced in the radial direction with respect to one gripping portion 41 of the other gripping portion 42 due to elasticity in which the shape characteristics of the bent portion 43b are synergistic. Therefore, as in the above example, even if there is a slight misalignment between the shaft core L of the through hole 10a and the shaft core L1 of the internal pipe 3, these misalignments are absorbed and the external pipe 2 in the through hole 10a is absorbed. And the internal pipe 3 through the connection member 4 are made accurately.
In the example shown in FIG. 7B, the bent portion 43 b may be provided near the middle portion of the connecting portion 43. Further, as in the third embodiment (FIG. 3), even when one gripping portion 41 is provided with a cored bar 45, it corresponds to the difference in fitting mode as shown in FIGS. 7 (a) and 7 (b). Can be.

なお、前記実施形態では、いずれもインバータケース１に適用した例について述べたが、貫通孔を有する壁体の両側に位置する２本の配管を、前記貫通孔において筒状の接続部材を介して接続する場合であれば、他の配管接続構造にも本発明が同様に適用可能である。また、接続部材４の全体がゴムの成型体からなる例について述べたが、他方の把持部４２が繋ぎ部４３を介して一方の把持部４１に対して径方向に変位可能に構成されるものであれば、ゴムの成型体以外のもので構成されるものであっても良い。加えて、各嵌合部での密封性を確保するためには、例示のような環状リップ部４１ａ，４１ｂ，４２ａを設けることは有効であるが、これらリップ部に代え、他のシール機能部を設けることも可能である。また、環状リップ部４１ａ，４１ｂ，４２ａの個数も、例示のような各３個に限らず、密封性及び装着性等を考慮して適宜設定することができる。 In the above-described embodiment, the example in which both are applied to the inverter case 1 has been described. However, two pipes positioned on both sides of a wall body having a through hole are connected to each other through a cylindrical connection member in the through hole. In the case of connection, the present invention can be similarly applied to other pipe connection structures. Moreover, although the example which the whole connection member 4 consists of a rubber molding was described, the other holding part 42 is configured to be displaceable in the radial direction with respect to one holding part 41 via the connecting part 43. If so, it may be made of a material other than a rubber molded body. In addition, it is effective to provide the annular lip portions 41a, 41b, and 42a as illustrated in order to ensure the sealing performance at each fitting portion, but instead of these lip portions, other sealing function portions are provided. It is also possible to provide. Further, the number of the annular lip portions 41a, 41b, and 42a is not limited to three as illustrated, and can be set as appropriate in consideration of sealing performance and mounting properties.

２外部配管（一方の配管、他方の配管）
３内部配管（他方の配管、一方の配管）
４接続部材
４１一方の把持部
４１ａ，４１ｂ環状リップ部
４２他方の把持部
４２ａ環状リップ部
４３繋ぎ部
４３ａ，４３ｂ屈曲部
４４締結リング
４５芯金
１０壁体
１０ａ貫通孔 2 External piping (one piping, the other piping)
3 Internal piping (the other piping, one piping)
4 connecting member 41 one gripping portion 41a, 41b annular lip portion 42 other gripping portion 42a annular lip portion 43 connecting portion 43a, 43b bent portion 44 fastening ring 45 cored bar 10 wall body 10a through hole

Claims

A pipe connection structure for connecting two pipes located on both sides of a wall having a through hole via a cylindrical connection member in the through hole,
The connection member has two gripping parts fitted to each of the two pipes, and a connecting part that connects the two gripping parts,
One gripping part of the two gripping parts is tightly fitted to one pipe of the pipe and tightly fitted to the through hole, and the other gripping part is tightly fitted to the other pipe. Characterized in that it is externally fitted and can be displaced in the radial direction with respect to the one gripping part via the connecting part, and a fastening ring is externally mounted on the outer diameter part of the other gripping part. Piping connection structure.

In the pipe connection structure according to claim 1,
The connecting portion of the connecting member is made of an elastic body.

In the pipe connection structure according to claim 1 or 2,
The pipe connection structure, wherein the connecting portion of the connecting member has a bent portion.

In the pipe connection structure according to claim 3,
The pipe connection structure, wherein the bent portion has a corrugated shape.

In the pipe connection structure according to claim 1 or 2,
The pipe connection structure, wherein the two gripping portions have different diameters, and the connecting portion has a tapered shape.

In the pipe connection structure according to any one of claims 1 to 5,
The pipe connection structure characterized in that the one gripping portion includes a cored bar.

In the pipe connection structure according to any one of claims 1 to 6,
An annular lip portion is formed on an outer fitting portion of the one gripping portion with respect to the one pipe and an inner fitting portion with respect to the through hole.

In the pipe connection structure according to any one of claims 1 to 7,
An annular lip portion is formed in the fitting portion of the other gripping portion with respect to the other piping.

A tubular connection member used in the pipe connection structure according to any one of claims 1 to 8,
A connecting member comprising two gripping portions fitted to each of the two pipes and an elastically deformable connecting portion connecting the two gripping portions.