JP5480206B2

JP5480206B2 - Pipe connection structure

Info

Publication number: JP5480206B2
Application number: JP2011151885A
Authority: JP
Inventors: 成行石井
Original assignee: Musasino Co Ltd
Current assignee: Musasino Co Ltd
Priority date: 2011-07-08
Filing date: 2011-07-08
Publication date: 2014-04-23
Anticipated expiration: 2031-07-08
Also published as: JP2013019438A

Description

本発明は、管状の接続対象を互いに接続する構造に関するもので、特に、外径の拡大を抑制することができ、密封構造にすることも容易な管の接続構造に関するものである。 The present invention relates to a structure for connecting tubular connection objects to each other, and particularly to a tube connection structure that can suppress an increase in outer diameter and that can be easily sealed.

管状の接続対象を互いに接続する構造は、管継ぎ手として様々のものが既に知られている。管継ぎ手は目的に応じて構成を分類することができ、一つの分類に属するものとして、接続部分を密封構造にして、管の内部を気密あるいは水密に保つことができる管継ぎ手もある。接続部分を密封構造にすることができる従来の管継ぎ手の代表的なものとして以下の構造を挙げることができる。
１．双方の管を溶接によって接続する構造。
２．双方の管の接合端にフランジを設け、双方のフランジをボルトで締結する構造。双方のフランジの相対向する面に溝を設け、この溝に沿ってＯ（「オー」と読む：以下同じ）リングを介在させ、Ｏリングによって密封構造としている。
３．双方の管の接合端に箍を嵌めることができるフランジを設けて双方のフランジの外周をテーパー形にし、蝶番で連結された箍を上記フランジの外周に嵌め、箍の締め付け力で上記双方のテーパー形フランジに引き付け力を発生させるもの。この場合も、双方のフランジの相対向する面に溝を設け、この溝に沿ってＯリングを介在させると、Ｏリングによって密封構造とすることができる。 Various structures for connecting tubular connection objects to each other are already known as pipe joints. The pipe joints can be classified according to the purpose, and as one belonging to one class, there is a pipe joint that can keep the inside of the pipe airtight or watertight by making the connecting portion a sealing structure. The following structure can be given as a typical example of a conventional pipe joint in which the connecting portion can have a sealed structure.
1. A structure in which both pipes are connected by welding.
2. A structure in which flanges are provided at the joint ends of both pipes, and both flanges are fastened with bolts. Grooves are provided on the opposing surfaces of both flanges, and an O (read “O”: the same applies hereinafter) ring is interposed along the groove, and a sealing structure is formed by the O ring.
3. Provide flanges that can fit the flanges at the joint ends of both pipes, make the outer periphery of both flanges tapered, fit the flanges connected by hinges to the outer periphery of the flanges, and tighten both flanges with the tightening force of the flanges A type that generates an attractive force on a flange. Also in this case, when a groove is provided on the opposing surfaces of both flanges and an O-ring is interposed along the groove, a sealing structure can be formed by the O-ring.

上記１の溶接による接続構造によれば、双方の管が永久的に溶着されるため、メンテナンスなどのために分離することは事実上困難である。
上記２のボルトを用いてフランジを締結する構造によれば、双方の管の外径からフランジが外側に大きく突出する難点がある。また、Ｏリングを介在させる場合、Ｏリングを嵌める溝を高い精度で加工する必要があり、コスト高になる。
上記３のテーパー形フランジと箍によって双方の管を接続する構造によれば、上記２の構造と同様に、双方の管の外径からフランジが外側に大きく突出する難点がある。また、Ｏリングを介在させる場合、Ｏリングを嵌める溝を高い精度で加工する必要があり、コスト高になる。 According to the connection structure by welding described in 1 above, since both the pipes are permanently welded, it is practically difficult to separate them for maintenance or the like.
According to the structure in which the flange is fastened using the bolt 2 described above, there is a difficulty that the flange largely protrudes outward from the outer diameters of both pipes. Further, when an O-ring is interposed, it is necessary to process a groove for fitting the O-ring with high accuracy, resulting in an increase in cost.
According to the structure in which both the pipes are connected by the taper-shaped flange 3 and the flange described above, there is a difficulty in that the flanges largely protrude outward from the outer diameters of both the pipes as in the structure 2 above. Further, when an O-ring is interposed, it is necessary to process a groove for fitting the O-ring with high accuracy, resulting in an increase in cost.

上記３の構造に類するものとして特許文献１および特許文献２に記載されている接続構造がある。特許文献１記載の発明は、管状の接続対象双方の接続端にフランジを設け、これらのフランジの突き合わせ面は筒の軸線に対し垂直面、上記突き合わせ面と反対側の面はテーパー形断面となっていて、これらのフランジの外周をバンドで取り巻き、バンドの両端をボルトで締め込んでバンドを縮径させ、管状の接続対象双方の接続面同士を密着方向に押圧するようにしたものである。接続対象の接続面の一方に形成した凹溝にＯリングを装着し、上記接続面の他方に上記Ｏリングを密着させている。 As a structure similar to the above structure 3, there is a connection structure described in Patent Document 1 and Patent Document 2. In the invention described in Patent Document 1, flanges are provided at both connection ends of a tubular connection object, the butting surfaces of these flanges are perpendicular to the axis of the cylinder, and the surface opposite to the butting surface has a tapered cross section. In addition, the outer periphery of these flanges is wrapped with a band, both ends of the band are tightened with bolts to reduce the diameter of the band, and the connection surfaces of both tubular connection objects are pressed in the close contact direction. An O-ring is attached to a concave groove formed on one of the connection surfaces to be connected, and the O-ring is in close contact with the other of the connection surfaces.

特許文献２に記載されている発明は、接続対象双方の接続端に断面形状が半円形の管状溝を有してなるフランジを設け、接続対象双方の上記管状溝が対向することによって形成される断面がほぼ円形の環状の空間にパッキンを介在させ、断面形状が略コ字状のクランプで上記双方のフランジを締めつけるようにしたものである。双方のフランジは、半円形の円弧面がクランプで締め付けられることにより圧着され、上記パッキンが押圧されて上記接続端が密閉される。 The invention described in Patent Document 2 is formed by providing a flange having a tubular groove with a semicircular cross-sectional shape at the connection ends of both of the connection objects, and facing the tubular grooves of both of the connection objects. A packing is interposed in an annular space having a substantially circular cross section, and both the flanges are fastened by a clamp having a substantially U-shaped cross section. Both flanges are crimped by clamping a semicircular arc surface with a clamp, and the packing is pressed to seal the connection end.

特許文献１および特許文献２に記載されている接続構造も、前記３の構造と同様に、フランジを有することによって外径が大きくなる難点があり、Ｏリングを設ける場合、Ｏリングを配置するための溝を精度よく加工する必要があって製造コストが嵩む難点がある。 The connection structures described in Patent Document 1 and Patent Document 2 also have a difficulty in increasing the outer diameter by having a flange, as in the case of the above-described structure 3. When an O-ring is provided, the O-ring is arranged. It is necessary to process the grooves with high accuracy, and there is a drawback that the manufacturing cost increases.

特開２００３−１２６６６１号公報JP 2003-126661 A 特開２００４−２３２７７２号公報Japanese Patent Laid-Open No. 2004-232772

本発明は、前記従来の管の接続構造の技術課題を解決すること、すなわち、接続部の外径が大きくなることを抑制し、構造が簡単で接続作業も簡単な管の接続構造を提供することを目的とする。 The present invention solves the technical problem of the conventional pipe connection structure, that is, suppresses an increase in the outer diameter of the connection portion, and provides a pipe connection structure with a simple structure and easy connection work. For the purpose.

本発明に係る管の接続構造は、
管状の接続対象を互いに接続する構造であって、
上記接続対象はそれぞれ互いに当接する当接面を有するとともに上記当接面から上記接続対象の軸線方向に遠ざかるにしたがい半径方向外側への突出量が小さくなる傾斜突起を周方向の複数個所に有し、
上記接続対象の当接面が互いに当接している状態で上記双方の各傾斜突起に半径方向外側から窓孔が嵌ることにより上記双方の傾斜突起を互いに引き付ける向きの力を発生させる箍と、
上記箍の両端部を引き付けながら結合する結合部材を有することを最も主要な特徴とする。 The pipe connection structure according to the present invention comprises:
A structure for connecting tubular connection objects to each other,
Each of the connection objects has contact surfaces that contact each other, and has inclined protrusions at a plurality of locations in the circumferential direction in which the protrusion amount decreases radially outward as the distance from the contact surface in the axial direction of the connection object increases. ,
A hook that generates a force in a direction to attract the two inclined protrusions by fitting a window hole from the radially outer side to the two inclined protrusions in a state where the contact surfaces of the connection target are in contact with each other;
The main feature is to have a coupling member that couples the two ends of the ridge while attracting each other.

接続対象の当接面が互いに当接している状態で双方の接続対象の各傾斜突起に、接続対象の半径方向外側から箍の窓孔を嵌め、箍の両端部を引き付けながら結合部材で結合する。箍の両端部を引き付けることにより、双方の傾斜突起を互いに引き付ける向きの力が発生し、双方の接続対象が接続される。箍は傾斜突起の最大高さよりも低い位置に置くことができるため、接続部の外径が大きくなることを抑制することができる。構造が簡単で接続作業も容易であるという利点もある。 In the state where the contact surfaces of the connection target are in contact with each other, the ridge window holes are fitted to the respective inclined projections of both connection targets from the outside in the radial direction of the connection target, and are coupled by the coupling member while attracting both ends of the ridge. . By attracting both end portions of the heel, a force is generated in a direction that attracts the two inclined projections to each other, and both connection objects are connected. Since the scissors can be placed at a position lower than the maximum height of the inclined protrusion, it is possible to suppress an increase in the outer diameter of the connecting portion. There is also an advantage that the structure is simple and the connection work is easy.

本発明に係る管の接続構造の実施例を示す正面図である。It is a front view which shows the Example of the connection structure of the pipe | tube which concerns on this invention. 上記実施例において接続対象を接続する前の態様を示す正面図である。It is a front view which shows the aspect before connecting a connection target in the said Example. 上記実施例の要部を拡大して示す正面図である。It is a front view which expands and shows the principal part of the said Example. 図１中の線Ａ−Ａに沿う断面図である。It is sectional drawing which follows the line AA in FIG. 上記実施例中の箍を示す平面図である。It is a top view which shows the bag in the said Example. 上記箍の正面図である。It is a front view of the said ridge. 上記実施例中の結合部材を示す正面図である。It is a front view which shows the coupling member in the said Example. 上記結合部材の縦断面図である。It is a longitudinal cross-sectional view of the said coupling member. 本発明に係る管の接続構造の利用例を概略的に示す正面図である。It is a front view which shows roughly the usage example of the connection structure of the pipe | tube which concerns on this invention.

以下、本発明に係る管の接続構造の実施例を、図面を参照しながら説明する。 Hereinafter, embodiments of the pipe connection structure according to the present invention will be described with reference to the drawings.

まず、本発明に係る管の接続構造の実施例の概略を、図１乃至図４を参照しながら説明する。図１乃至図４において、符号１，２は互いに接続される円筒形状あるいは管状の接続対象を示している。接続対象１，２は、それぞれ互いに当接する当接面１４，２４を有するとともに、当接面１４，２４から接続対象１，２の軸線方向に遠ざかるにしたがい半径方向外側への突出量が小さくなる傾斜突起１３，２３を周方向の複数個所に有している。上記実施例に係る管の接続構造はまた、接続対象１，２の当接面１４，２４が互いに当接している状態で双方の各傾斜突起１３，２３に半径方向外側から窓孔３１が嵌ることにより双方の傾斜突起１３，２３を互いに引き付ける向きの力を発生させる箍３を有している。さらに、箍３の両端部を引き付けながら結合する結合部材４を有している。 First, an outline of an embodiment of a pipe connection structure according to the present invention will be described with reference to FIGS. 1 to 4, reference numerals 1 and 2 indicate cylindrical or tubular connection objects connected to each other. The connection objects 1 and 2 have contact surfaces 14 and 24 that contact each other, and the amount of protrusion outward in the radial direction decreases as the distance from the contact surfaces 14 and 24 in the axial direction of the connection objects 1 and 2 decreases. The inclined protrusions 13 and 23 are provided at a plurality of locations in the circumferential direction. In the pipe connection structure according to the above-described embodiment, the window holes 31 are fitted into the respective inclined projections 13 and 23 from the radially outer side in a state where the contact surfaces 14 and 24 of the connection objects 1 and 2 are in contact with each other. Thus, it has a hook 3 that generates a force in a direction to attract both the inclined protrusions 13 and 23 to each other. Furthermore, it has the coupling member 4 couple | bonded, attracting the both ends of the collar 3.

上記実施例をより詳細に説明する。図３、図４に示すように、接続対象１，２の互いに接続すべき端面にはそれぞれ第１接続リング１１と第２接続リング２１が適宜の固着手段によって結合されている。図示の実施例では、接続対象１と第１接続リング１１双方の結合面の外周縁部が溶着され、双方の結合面が密閉されている。符号６は溶着部を示している。接続対象２と第２接続リング２１双方の結合面の外周縁部も溶着され、双方の結合面が密閉されている。符号７は溶着部を示している。このように、本実施例では、製作の都合上、接続対象１、２にそれぞれ第１、第２接続リング１１，２１を結合しているが、双方の接続対象１，２の接続端部を直接加工して第１、第２接続リング１１，２１と同じ形状の接続端部を一体に形成してもよい。したがって、第１接続リング１１は接続対象１の一部である接続端部として扱い、第２接続リング２１は接続対象２の一部である接続端部として扱うものとする。 The above embodiment will be described in more detail. As shown in FIGS. 3 and 4, the first connection ring 11 and the second connection ring 21 are coupled to the end surfaces of the connection objects 1 and 2 to be connected to each other by appropriate fixing means. In the illustrated embodiment, the outer peripheral edge portions of the coupling surfaces of both the connection object 1 and the first connection ring 11 are welded, and both the coupling surfaces are sealed. Reference numeral 6 denotes a welded portion. The outer peripheral edge portions of the coupling surfaces of both the connection object 2 and the second connection ring 21 are also welded, and both the coupling surfaces are sealed. Reference numeral 7 denotes a welded portion. As described above, in this embodiment, the first and second connection rings 11 and 21 are coupled to the connection objects 1 and 2 for the convenience of production, but the connection ends of both connection objects 1 and 2 are connected to each other. The connection end portions having the same shape as the first and second connection rings 11 and 21 may be integrally formed by direct processing. Accordingly, the first connection ring 11 is treated as a connection end that is a part of the connection target 1, and the second connection ring 21 is treated as a connection end that is a part of the connection target 2.

双方の接続対象１，２の接続端部を構成している第１接続リング１１と第２接続リング２１の大部分の外径は、接続対象１，２の本体部分の外径よりも小さくなっている。これらの第１、第２接続リング１１，２１の小径部を図３においてそれぞれ符号１２，２２で示している。上記各小径部１２，２２に傾斜突起１３，２３が形成されている。各傾斜突起１３，２３は、接続対象１，２本体部分の外径以内に、したがって接続対象１，２本体部分を軸線方向から投影したときこの投影面から突出しない高さに形成されている。 Most of the outer diameters of the first connection ring 11 and the second connection ring 21 constituting the connection ends of the connection objects 1 and 2 are smaller than the outer diameters of the main body portions of the connection objects 1 and 2. ing. The small diameter portions of the first and second connection rings 11 and 21 are denoted by reference numerals 12 and 22 in FIG. Inclined protrusions 13 and 23 are formed on the respective small diameter portions 12 and 22. Each of the inclined protrusions 13 and 23 is formed within the outer diameter of the connection target 1 and 2 main body portions, and therefore, at a height that does not protrude from the projection plane when the connection target 1 and 2 main body portions are projected from the axial direction.

第１接続リング１１と第２接続リング２１は半径方向内外に嵌り合うように、図示の実施例では、第１接続リング１１の外周面に第２接続リング２１の内周面が嵌り合うように形成されている。一方の接続リングである第１接続リング１１は、第２接続リング２１との嵌め合い面１５の奥端に、第２接続リング２１の先端面が当接する段状の当接面１４を、第１接続リング１１の中心軸線に対し直交する方向に有している。第２接続リング２１の上記先端面は第１接続リング１１の上記当接面１４と当接する当接面２４となっている。 In the illustrated embodiment, the first connection ring 11 and the second connection ring 21 fit inward and outward in the radial direction, so that the inner peripheral surface of the second connection ring 21 fits in the outer peripheral surface of the first connection ring 11. Is formed. The first connection ring 11, which is one of the connection rings, has a stepped contact surface 14 with which the front end surface of the second connection ring 21 contacts the back end of the fitting surface 15 with the second connection ring 21. One connecting ring 11 has a direction perpendicular to the central axis. The tip surface of the second connection ring 21 is a contact surface 24 that contacts the contact surface 14 of the first connection ring 11.

上記当接面１４と上記嵌め合い面１５とで接続リング１１の周方向に形成されている角隅部には、この角隅部の全周を巡ってシール部材であるＯリング８が配置されている。第２接続リング２１は、第１接続リング１１の嵌め合い面１５の外周面に嵌る嵌め合い面２５を有するとともに、第２接続リング２１の中心軸線に対し直交する方向に形成された上記当接面２４を有している。第１接続リング１１の当接面１４と第２接続リング２１の当接面２４とが当接し、上記Ｏリング８が第２接続リング２１の当接面２４に押圧されて、内外に嵌り合っている接続リング１１，２１の内部を密閉している。 An O-ring 8 that is a seal member is disposed around the entire corner of the corner of the contact ring 14 and the fitting surface 15 formed in the circumferential direction of the connection ring 11. ing. The second connection ring 21 has a fitting surface 25 that fits on the outer peripheral surface of the fitting surface 15 of the first connection ring 11, and the abutment formed in a direction orthogonal to the central axis of the second connection ring 21. It has a surface 24. The abutment surface 14 of the first connection ring 11 and the abutment surface 24 of the second connection ring 21 abut, and the O-ring 8 is pressed against the abutment surface 24 of the second connection ring 21 to fit inside and outside. The connecting rings 11 and 21 are sealed.

第１接続リング１１の当接面１４に続いて外周の一部が第１接続リング１１の半径方向外側に突出し、この突出部は、当接面１４から接続リング１１の軸線方向に遠ざかるにしたがい半径方向への突出量が小さくなる前記傾斜突起１３を構成している。第２接続リング２１の当接面２４も、当接面２４に続いて外周の一部が第２接続リング２１の半径方向外側に突出し、この突出部は、当接面２４から接続リング２１の軸線方向に遠ざかるにしたがい半径方向への突出量が小さくなる前記傾斜突起２３を構成している。各接続リング１１、２１の傾斜突起１３、２３は、図４に示すように各接続リング１１、２１の周方向４箇所に等間隔で設けられている。双方の傾斜突起１３、２３が各接続リング１１、２１の軸線方向に重なった状態で各接続リング１１、２１の当接面１４，２４が当接するようになっている。双方の傾斜突起１３、２３が重なった状態における傾斜突起１３、２３の、接続リング１１、２１の軸線方向の断面形状は、図３に示すように２等辺三角形状になる。 A part of the outer periphery protrudes radially outward of the first connection ring 11 subsequent to the contact surface 14 of the first connection ring 11, and this protrusion is away from the contact surface 14 in the axial direction of the connection ring 11. The inclined protrusion 13 is configured to reduce the amount of protrusion in the radial direction. The abutment surface 24 of the second connection ring 21 also has a part of the outer periphery that protrudes outward in the radial direction of the second connection ring 21 following the abutment surface 24. The inclined protrusion 23 is configured such that the amount of protrusion in the radial direction decreases as the distance from the axial line increases. The inclined protrusions 13 and 23 of the connection rings 11 and 21 are provided at equal intervals in four circumferential directions of the connection rings 11 and 21 as shown in FIG. The contact surfaces 14, 24 of the connection rings 11, 21 are in contact with each other in a state where the both inclined projections 13, 23 are overlapped in the axial direction of the connection rings 11, 21. The cross-sectional shape in the axial direction of the connecting rings 11 and 21 of the inclined protrusions 13 and 23 in a state where both the inclined protrusions 13 and 23 are overlapped is an isosceles triangle as shown in FIG.

上記のように双方の接続リング１１、２１の当接面１４，２４が互いに当接している状態で、双方の接続リング１１、２１の各傾斜突起１３，２３に半径方向外側から箍３の窓孔３１が嵌められる。箍３は、図５、図６に示すように、弾性体、例えば板バネを、円弧の一部を切除した形に成形したもので、箍３の長さ方向換言すれば円弧方向両端部は結合部材４を接続するための折り返し端部３２となっている。したがって、箍３を平面方向から見ると、図５に示すように「Ω」字状になっている。箍３にはまた、周方向の４箇所に、かつ、各傾斜突起１３，２３に対応する位置に、箍３の周方向に長い長方形状の窓孔３１が形成されている。各窓孔３１の周方向の長さＬは、傾斜突起１３，２３の周方向の長さよりも長い。接続リング１１、２１の軸線方向における各窓孔３１の幅Ｗは、双方の接続リング１１、２１が接続されることによって互いに重なり合う双方の傾斜突起１３，２３を合わせた上記軸線方向の幅よりも狭い。 In the state where the contact surfaces 14 and 24 of both connection rings 11 and 21 are in contact with each other as described above, the window of the flange 3 is formed on the inclined projections 13 and 23 of both connection rings 11 and 21 from the outside in the radial direction. The hole 31 is fitted. As shown in FIG. 5 and FIG. 6, the flange 3 is an elastic body, for example, a leaf spring, which is formed into a shape in which a part of the arc is cut away. It is a folded end 32 for connecting the coupling member 4. Therefore, when the ridge 3 is viewed from the plane direction, it has an “Ω” shape as shown in FIG. In addition, rectangular window holes 31 that are long in the circumferential direction of the flange 3 are formed in the flange 3 at four positions in the circumferential direction and at positions corresponding to the inclined protrusions 13 and 23. The circumferential length L of each window hole 31 is longer than the circumferential length of the inclined protrusions 13 and 23. The width W of each window hole 31 in the axial direction of the connection rings 11 and 21 is larger than the width in the axial direction in which the inclined protrusions 13 and 23 that overlap each other when the connection rings 11 and 21 are connected are combined. narrow.

箍３の周方向（円弧方向）両端部は、この両端部に形成されている折り返し端部３２が結合部材４によって互いに引き付けられながら結合される。図７、図８は結合部材４を示している。図７、図８において、結合部材４は例えば金属板をプレス成形することによって製作することができ、両側縁部に、箍３の長さ方向両端部の折り返し端部３２に接続するための折り返し端縁部４１を有している。これらの折り返し端縁部４１は結合部材４の幅が連続的に変化する傾斜縁４２となっていて、箍３の長さ方向両端部の折り返し端部３２に結合部材４の折り返し端縁部４１をスライドさせながら掛け止めることにより、箍３の両端部を引き付けるように構成されている。結合部材４の平坦な面の中央部にはねじ孔４３が設けられている。 Both ends of the flange 3 in the circumferential direction (circular arc direction) are coupled while the folded end portions 32 formed at both ends are attracted to each other by the coupling member 4. 7 and 8 show the coupling member 4. 7 and 8, the coupling member 4 can be manufactured, for example, by press-molding a metal plate, and is folded at both side edges to be connected to the folded ends 32 at both ends in the length direction of the flange 3. An end edge portion 41 is provided. These folded end edges 41 are inclined edges 42 in which the width of the coupling member 4 continuously changes, and the folded end edges 41 of the coupling member 4 are connected to the folded ends 32 at both ends in the longitudinal direction of the flange 3. It is configured so as to attract both ends of the flange 3 by sliding the hook while sliding. A screw hole 43 is provided at the center of the flat surface of the coupling member 4.

片方の接続対象２の一部をなす第２接続リング２１の小径部２２の長さは、他方の接続対象１の一部をなす第１接続リング１１の小径部１２の長さよりも長くなっていて、上記小径部２２に、箍３の弾性を利用して箍３を暫定的に巻き付けることができるようになっている。図３において符号３Ａは上記小径部２２に暫定的に巻き付けられた箍３を示している。このように、第２接続リング２１の小径部２２に箍３を暫定的に巻き付けておき、第１、第２接続リング１１、２１の傾斜突起１３，２３が重なり合った状態で箍３を傾斜突起１３，２３の方に向かってスライドさせる。箍３は傾斜突起１３，２３の傾斜面に沿って箍３の径を広げられながらスライドし、箍３の窓孔３１が傾斜突起１３，２３の位置と合致することによって、箍３はその弾性力により径を縮小する。 The length of the small-diameter portion 22 of the second connection ring 21 that forms a part of the one connection object 2 is longer than the length of the small-diameter portion 12 of the first connection ring 11 that forms a part of the other connection object 1. Thus, the collar 3 can be temporarily wound around the small diameter portion 22 by utilizing the elasticity of the collar 3. In FIG. 3, reference numeral 3 </ b> A indicates the collar 3 that is temporarily wound around the small-diameter portion 22. In this way, the flange 3 is provisionally wound around the small-diameter portion 22 of the second connection ring 21, and the flange 3 is inclined with the inclined protrusions 13 and 23 of the first and second connection rings 11, 21 overlapped. Slide toward 13 and 23. The flange 3 slides along the inclined surfaces of the inclined protrusions 13 and 23 while expanding the diameter of the flange 3, and the window hole 31 of the flange 3 matches the position of the inclined protrusions 13 and 23. The diameter is reduced by force.

径を縮小するときの箍３の弾性力により、箍３の窓孔３１の幅Ｗ方向の縁が傾斜突起１３，２３の傾斜面に当たり、傾斜突起１３，２３を互いに圧接させようとする向きの分力が生じる。箍３の両端の折り返し端部３２には結合部材４の折り返し端縁部４１が掛け止められ、箍３の両端部が結合される。箍３の両端の折り返し端部３２に結合部材４を掛け止めるに際しては、上記折り返し端部３２に結合部材４の折り返し端縁部４１をスライドさせながら掛け止める。結合部材４の折り返し端縁部４１は結合部材４の幅が連続的に変化する傾斜縁４２となっているため、上記折り返し端縁部４１をスライドさせながら折り返し端部３２に掛け止めることにより、箍３の両端の折り返し端部３２が上記傾斜縁４２によって強力に引き付けられ、箍３の窓孔３１の縁が傾斜突起１３，２３の傾斜面に当たることによって生じる上記分力がより強力になる。 The edge in the width W direction of the window hole 31 of the flange 3 hits the inclined surface of the inclined protrusions 13 and 23 due to the elastic force of the flange 3 when the diameter is reduced, and the inclined protrusions 13 and 23 are pressed against each other. A component force is generated. The folded end edge portions 41 of the coupling member 4 are hooked on the folded end portions 32 at both ends of the collar 3, and both ends of the collar 3 are coupled. When the coupling member 4 is hooked on the folded end portions 32 at both ends of the flange 3, the folded end edge portion 41 of the coupling member 4 is latched while sliding on the folded end portion 32. Since the folded end edge 41 of the coupling member 4 is an inclined edge 42 in which the width of the coupling member 4 continuously changes, the folded end edge 41 is hung on the folded end 32 while sliding. The folded end portions 32 at both ends of the flange 3 are strongly attracted by the inclined edge 42, and the component force generated when the edge of the window hole 31 of the flange 3 hits the inclined surfaces of the inclined protrusions 13 and 23 becomes stronger.

上記分力により第１、第２接続リング１１、２１の当接面１４，２４が互いに押圧され、図１、図３に示すように、第１、第２接続リング１１、２１が接続され、結果的には、管状の部材である第１の接続対象１と第２の接続対象２が接続される。上記のように第１、第２接続リング１１、２１の当接面１４，２４が互いに押圧されることにより、シール部材であるＯリング８が第１、第２接続リング１１、２１間で押圧され、内外に嵌り合う第１、第２接続リング１１、２１の内部をＯリング８が密閉している。 The abutment surfaces 14 and 24 of the first and second connection rings 11 and 21 are pressed against each other by the component force, and the first and second connection rings 11 and 21 are connected as shown in FIGS. As a result, the first connection object 1 and the second connection object 2 which are tubular members are connected. As described above, the contact surfaces 14 and 24 of the first and second connection rings 11 and 21 are pressed against each other, so that the O-ring 8 that is a seal member is pressed between the first and second connection rings 11 and 21. The O-ring 8 seals the inside of the first and second connection rings 11 and 21 that fit inside and outside.

箍３の両端の折り返し端部３２を引き付ける力は結合部材４の両端の傾斜縁４２によって生じるため、結合部材４には箍３の両端の折り返し端部３２から抜け出る向きの分力が働く。そこで、結合部材４のねじ孔４３に止めねじ３０をねじ込み、止めねじ３０の先端を第１接続リング１１または第２接続リング２１の表面に突き当てることにより、結合部材４の抜け止めを行っている。 Since the force that attracts the folded end portions 32 at both ends of the flange 3 is generated by the inclined edges 42 at both ends of the coupling member 4, a component force that pulls out from the folded end portions 32 at both ends of the flange 3 acts on the coupling member 4. Therefore, the set screw 30 is screwed into the screw hole 43 of the coupling member 4 and the tip of the set screw 30 is abutted against the surface of the first connection ring 11 or the second connection ring 21 to prevent the coupling member 4 from coming off. Yes.

以上説明した管の接続構造の実施例は、接続対象１，２の互いに当接する当接面１４，２４から接続対象１，２の軸線方向に遠ざかるにしたがい半径方向外側への突出量が小さくなる傾斜突起１３，２３を周方向の複数個所に設け、これら傾斜突起１３，２３の半径方向外側から箍３の窓孔３１を嵌めることにより、双方の傾斜突起１３，２３を互いに引き付ける向きの力を発生させるように構成されている。そして、箍３の両端部を引き付けながら結合する結合部材４を有している。上記傾斜突起１３，２３は接続対象１，２の外径よりも半径方向内側に設けることができるため、接続部の外径が接続対象１，２の外径よりも増大することを回避することができる。 In the embodiment of the pipe connection structure described above, the amount of protrusion outward in the radial direction becomes smaller as the connection objects 1 and 2 come into contact with each other in contact with the contact surfaces 14 and 24 in the axial direction. By providing the inclined protrusions 13 and 23 at a plurality of locations in the circumferential direction and fitting the window holes 31 of the flange 3 from the radially outer side of the inclined protrusions 13 and 23, a force in a direction to attract both the inclined protrusions 13 and 23 to each other is obtained. It is configured to generate. And it has the coupling member 4 couple | bonded, attracting the both ends of the collar 3. FIG. Since the inclined protrusions 13 and 23 can be provided radially inward of the outer diameters of the connection objects 1 and 2, it is possible to avoid an increase in the outer diameter of the connection portion from that of the connection objects 1 and 2. Can do.

互いに接続される双方の接続対象１，２の接続端部は小径部１２，２２になっていて、片方の接続対象の小径部に箍３を暫定的に巻き付かせることができるように構成されているため、上記箍３を上記小径部に沿ってスライドさせながらその窓孔３１を双方の傾斜突起１３，２３に嵌めることができ、箍３を傾斜突起１３，２３に嵌める作業が容易になる。 The connection end portions of both connection objects 1 and 2 connected to each other are small-diameter portions 12 and 22, and are configured so that the collar 3 can be temporarily wound around the small-diameter portion of one connection object. Therefore, the window hole 31 can be fitted to both the inclined protrusions 13 and 23 while sliding the flange 3 along the small diameter portion, and the operation of fitting the flange 3 to the inclined protrusions 13 and 23 is facilitated. .

箍３から結合部材４を外し、箍３を傾斜突起１３，２３から外せば、接続対象１，２を分離することができる。箍３を傾斜突起１３，２３から外すとき、傾斜突起１３，２３の傾斜面に沿って箍３をスライドさせ、片方の接続対象の小径部に箍３を移動させておけば、再び接続対象１，２を接続するときの作業性が良くなるばかりでなく、箍３を無くしてしまう恐れもない。したがって、接続対象１，２に内蔵されている装置や回路などのメンテナンスが容易になる。 If the coupling member 4 is removed from the flange 3 and the flange 3 is removed from the inclined protrusions 13 and 23, the connection objects 1 and 2 can be separated. When the hook 3 is removed from the inclined protrusions 13 and 23, the hook 3 is slid along the inclined surface of the inclined protrusions 13 and 23, and the hook 3 is moved to the small diameter portion of one of the connection objects. , 2 not only improves the workability, but also eliminates the risk of losing the hook 3. Therefore, maintenance of devices and circuits incorporated in the connection objects 1 and 2 is facilitated.

弾性体によって円弧の一部が切除された形に形成された箍３の両端は結合部材４で結合され、かつ、結合部材４による箍３の両端の引き付け力で双方の接続対象１，２が接続される構造になっているため、接続対象１，２を接続するのに必要な箍３を装着するための作業性が向上する。 Both ends of the flange 3 formed in a shape in which a part of the arc is cut off by the elastic body are coupled by the coupling member 4, and the connection objects 1 and 2 are connected by the attractive force of the both ends of the collar 3 by the coupling member 4. Since the structure is connected, workability for mounting the rod 3 necessary for connecting the connection objects 1 and 2 is improved.

双方の接続対象１，２の接続端にはそれぞれ第１、第２接続リング１１，２１が固着され、第１、第２接続リング１１，２１を接続することによって接続対象１，２が接続されるようになっている。このような構成にすれば、接続対象１，２の接続端を直接加工するのではなく、第１、第２接続リング１１，２１を加工して接続対象１，２に接続すればよく、加工が容易である。また、第１、第２接続リング１１，２１の肉厚を厚くし、この肉厚内に小径部１２，２２を形成し、かつ、傾斜突起１３，２３を形成することができるので、接続構造部分の外径が拡大することを避けるための構造に適している。 First and second connection rings 11 and 21 are fixed to the connection ends of both connection objects 1 and 2, respectively, and the connection objects 1 and 2 are connected by connecting the first and second connection rings 11 and 21. It has become so. With such a configuration, the first and second connection rings 11 and 21 may be processed and connected to the connection objects 1 and 2 instead of directly processing the connection ends of the connection objects 1 and 2. Is easy. Further, since the thickness of the first and second connection rings 11 and 21 can be increased, the small diameter portions 12 and 22 can be formed in the thickness, and the inclined protrusions 13 and 23 can be formed. It is suitable for a structure that prevents the outer diameter of the portion from expanding.

本発明に係る管の接続構造の適用範囲は特に限定されないが、例えば、液体中に没した状態で使用する機器に適用することができる。図９はその一例である受圧式液面計の例を示す。図９において、符号１０は受圧式液面計、符号２０は液体が貯蔵されるタンクを示している。タンク２０の底面近くには液面計１０が設置され、液面計１０はタンク２０に貯蔵された液体に没している。液面計１０は前述のとおり第１、第２の管状の部材である接続対象１、２からなり、接続対象１、２は前述の接続構造によって接続されている。受圧式液面計は、センサ部分とこのセンサによる検出信号を処理して液面の高さを演算する回路部分からなる。図２において符号９は、上記センサ部分と回路部分を電気的に接続するケーブルコネクタを示している。ケーブルコネクタ９およびケーブルは、接続対象１、２が接続されることにより接続対象１、２内に密封される。 Although the application range of the pipe connection structure according to the present invention is not particularly limited, for example, it can be applied to a device used in a state of being immersed in a liquid. FIG. 9 shows an example of a pressure-receiving type liquid level gauge as an example. In FIG. 9, reference numeral 10 denotes a pressure-receiving type liquid level gauge, and reference numeral 20 denotes a tank in which liquid is stored. A liquid level gauge 10 is installed near the bottom surface of the tank 20, and the liquid level gauge 10 is immersed in the liquid stored in the tank 20. The liquid level gauge 10 includes the connection objects 1 and 2 which are the first and second tubular members as described above, and the connection objects 1 and 2 are connected by the connection structure described above. The pressure-receiving type liquid level gauge is composed of a sensor part and a circuit part for processing the detection signal from the sensor and calculating the height of the liquid level. In FIG. 2, reference numeral 9 denotes a cable connector for electrically connecting the sensor portion and the circuit portion. The cable connector 9 and the cable are sealed in the connection objects 1 and 2 when the connection objects 1 and 2 are connected.

１接続対象（第１の管）
２接続対象（第２の管）
３箍
４結合部材
８Ｏリング（シール部材）
１１第１接続リング
１２小径部
１３傾斜突起
１４当接面（段部）
１５嵌め合い面
２１第２接続リング
２２小径部
２３傾斜突起
２４当接面（先端面）
２５嵌め合い面
３０止めねじ
３１窓孔
３２折り返し端部
４１折り返し端縁部
４２傾斜縁
４３ねじ孔 1 Connection target (first pipe)
2 Connection target (second pipe)
3 ４ 4 Coupling member 8 O-ring (seal member)
11 First connection ring 12 Small diameter portion 13 Inclined protrusion 14 Contact surface (step portion)
15 Fitting surface 21 Second connection ring 22 Small diameter portion 23 Inclined protrusion 24 Contact surface (tip surface)
25 Fitting surface 30 Set screw 31 Window hole 32 Folded end 41 Folded end edge 42 Inclined edge 43 Screw hole

Claims

A structure for connecting tubular connection objects to each other,
Each of the connection objects has contact surfaces that contact each other, and has inclined protrusions at a plurality of locations in the circumferential direction in which the protrusion amount decreases radially outward as the distance from the contact surface in the axial direction of the connection object increases. ,
A hook that generates a force in a direction to attract the two inclined protrusions by fitting a window hole from the radially outer side to the two inclined protrusions in a state where the contact surfaces of the connection target are in contact with each other;
A pipe connection structure having a coupling member that couples both ends of the rod while attracting each other.

2. The pipe connection structure according to claim 1, wherein connection end portions of both connection objects are small-diameter portions, and inclined projections are formed on these small-diameter portions.

The pipe connection structure according to claim 2, wherein the inclined protrusion formed in the small diameter portion is formed within the outer diameter of the connection target main body portion.

The pipe connection structure according to claim 1, wherein the scissors are made of an elastic body having a shape in which a part of the arc is cut off, and both ends in the arc direction of the scissors are turned-up ends for connecting the coupling members.

The coupling member has a folded end edge for connecting to the folded end at both ends in the arc direction of the flange, and the folded end edge is an inclined edge in which the width of the coupling member continuously changes, The pipe connection according to claim 4, wherein both ends of the scissors are attracted by sliding and engaging the folded end edges of the coupling members to the folded ends of both ends in the arc direction of the scissors. Construction.

5. The pipe connection structure according to claim 4, wherein the connection end portions of both of the connection targets are small-diameter portions, and at least one of the connection-target small-diameter portions can be temporarily wound with a flange.

The pipe connection structure according to claim 1, wherein connection ends that fit inward and outward in the radial direction are fixed to end surfaces to be connected to each other, and inclined protrusions are formed on these connection rings.

One of the connection rings that fits inside and outside has a stepped contact surface that abuts the end surface of the other connection ring at the back end of the fit surface. The sealing member is arrange | positioned at the corner | angular corner part formed in the circumferential direction, This sealing member is pressed by the end surface of said other connection ring, and has sealed the inside of the connection ring which fits in the said inside and outside. Pipe connection structure.

The pipe connection structure according to claim 1, wherein the window hole formed in the flange has a longer circumferential length to be connected than a circumferential length of the inclined protrusion to be connected.

The window hole formed in the eaves has a width in the axial direction of the connection target that is narrower than the width in the axial direction of the two inclined projections that overlap each other when the connection targets are connected. 9. The pipe connection structure according to 9.