JPH06159574A - Pipe joint - Google Patents
Pipe jointInfo
- Publication number
- JPH06159574A JPH06159574A JP4306837A JP30683792A JPH06159574A JP H06159574 A JPH06159574 A JP H06159574A JP 4306837 A JP4306837 A JP 4306837A JP 30683792 A JP30683792 A JP 30683792A JP H06159574 A JPH06159574 A JP H06159574A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- joint body
- cylindrical
- joint
- cylindrical portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
- F16L19/028—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall
- F16L19/0283—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall and having a bell-mouthed shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/04—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with a swivel nut or collar engaging the pipe
- F16L47/041—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with a swivel nut or collar engaging the pipe the plastic pipe end being flared either before or during the making of the connection
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、管の端部を継手本体に
嵌合したのち、袋ナット等の管締付用円筒部材で上記管
の端部を継手本体に締め付けて管と継手本体との間のシ
ールを行う管継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe and a joint body by fitting the end portion of the pipe to the joint body and then tightening the end portion of the pipe to the joint body with a tubular member for tightening the pipe such as a cap nut. The present invention relates to a pipe joint that seals between
【０００２】[0002]
【従来の技術】従来、この種の管継手は種々の構造のも
のが知られている。例えば、図１１に示すように、例え
ばフッソ樹脂製管３０の端部を加熱加工処理によりフレ
ア状に広げたのちフッソ樹脂製継手本体３１に嵌合さ
せ、管３０を継手本体３１に嵌合させた部分に袋ナット
３２をかぶせて該袋ナット３２の内面の断面直角の角部
３２ａを管３１に押し付けて、この部分で管３０と継手
本体３１との密着を図るとともに、管３０が継手本体３
１から抜けないように構成したものがある（実開昭６１
−１４５１８３号）。2. Description of the Related Art Conventionally, various types of pipe joints of this type are known. For example, as shown in FIG. 11, for example, the end portion of the fluorine resin pipe 30 is flared by heat processing, and then fitted into the fluorine resin joint body 31, and the pipe 30 is fitted into the joint body 31. The cap nut 32 is put on the closed portion and the corner portion 32a of the inner surface of the cap nut 32 having a right angle in cross section is pressed against the pipe 31, and the pipe 30 and the joint body 31 are closely contacted at this portion, and the pipe 30 is attached to the joint body. Three
There is one that is configured so that it does not get out of 1 (Shokaisho 61
-145183).
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記構
造のものでは、管内の流体の温度により管の温度が上下
動すると、管の端部が加熱加工処理されたフレア状から
処理前の元の単なる円筒形に戻ろうとし、管と袋ナット
と継手本体との間に隙間が生じて、管が継手本体から抜
けてしまったり、管と継手本体との密着性が悪くなると
いった問題があった。従って、本発明の目的は、上記問
題を解決することにあって、管の温度の上下動にもかか
わらず管が継手本体から抜け出にくく、管と継手本体と
の密着性に優れた管継手を提供することにある。However, in the structure described above, when the temperature of the pipe moves up and down due to the temperature of the fluid in the pipe, the end portion of the pipe is changed from the flare shape obtained by the heat treatment to the original state before the treatment. When trying to return to a cylindrical shape, there were problems that a gap was created between the pipe, the cap nut and the joint body, the pipe came off from the joint body, and the adhesion between the pipe and the joint body deteriorates. Therefore, an object of the present invention is to solve the above-mentioned problems, in spite of the vertical movement of the temperature of the pipe, the pipe is difficult to come out from the joint body, and a pipe joint excellent in adhesion between the pipe and the joint body is provided. To provide.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、管の端部の内面に周方向に延びる凹部を
有する一方、継手本体に上記凹部に嵌合係止する凸部を
備えて、管の抜け止めを行えるように構成する。すなわ
ち、管の端部を継手本体に嵌合したのち管締付用円筒部
材で上記管の端部を上記継手本体に締め付けるようにし
た管継手において、上記管は、その端部に、径方向外側
に膨れた傾斜部と、該傾斜部に連続した円筒部と、該円
筒部の内面に形成されかつ周方向に延びる凹部とを有
し、上記継手本体は、上記管の傾斜部の内面が接触可能
な傾斜部と、上記管の円筒部の内面が接触可能な円筒部
と、上記凹部に嵌合係止可能な凸部と、ねじ部とを有
し、上記円筒部材は、その内面に、上記管の傾斜部の外
面に押圧接触して該傾斜部を上記継手本体の傾斜部に密
着させる傾斜部と、上記管の円筒部を上記継手本体の円
筒部に押圧接触させるとともに上記凹部に上記継手本体
の凸部を嵌合させる円筒部と、上記継手本体のねじ部に
螺合するねじ部とを有するように構成する。上記構成に
よれば、上記円筒部は、円筒部本体と、該円筒部本体に
連続して径方向外側に膨れるテーパ部とより構成し、該
テーパ部の内面に上記凹部が形成されるように構成する
こともできる。また、上記構成によれば、上記凸部は、
管の端部端面側に管軸方向と直交しかつ上記管の凹部内
面と面接触可能な垂直面を有するとともに、管の上記端
部とは反対側に管の端部を案内する傾斜面を有するよう
に構成することもできる。In order to achieve the above-mentioned object, the present invention has a concave portion extending in the circumferential direction on the inner surface of the end portion of a pipe, and a convex portion fitted and locked in the concave portion in a joint body. Is provided so that the pipe can be prevented from coming off. That is, in a pipe joint in which the end portion of the pipe is fitted to the joint body and then the end portion of the pipe is fastened to the joint body by the pipe fastening cylindrical member, the pipe has a radial direction at its end portion. The joint body has an inclined portion that bulges outward, a cylindrical portion that is continuous with the inclined portion, and a recess that is formed on the inner surface of the cylindrical portion and that extends in the circumferential direction. A contactable inclined portion, a cylindrical portion with which the inner surface of the cylindrical portion of the tube is in contact, a convex portion that can be fitted and locked in the concave portion, and a screw portion, and the cylindrical member has an inner surface thereof. An inclined portion that press-contacts the outer surface of the inclined portion of the pipe to bring the inclined portion into close contact with the inclined portion of the joint body; and a cylindrical portion of the pipe that is pressed into contact with the cylindrical portion of the joint body and is in the concave portion. A cylindrical portion into which the convex portion of the joint body is fitted, and a screw portion that is screwed into the thread portion of the joint body. Configured to have. According to the above configuration, the cylindrical portion includes the cylindrical portion main body and the tapered portion that continuously bulges outward in the radial direction of the cylindrical portion main body, and the concave portion is formed on the inner surface of the tapered portion. It can also be configured. Further, according to the above configuration, the convex portion is
An end face of the pipe has a vertical surface orthogonal to the pipe axial direction and capable of making surface contact with the inner surface of the recess of the pipe, and an inclined surface for guiding the end of the pipe on the side opposite to the end of the pipe. It can also be configured to have.
【０００５】[0005]
【発明の効果】本発明の構成によれば、管がその内部を
通る流体又は管周囲の環境等により温度変動が生じて、
管の端部が元の単なる円筒形に戻ろうとして継手本体の
接続端部から管の端部が抜け出ようとしても、継手本体
の凸部が管の凹部内に嵌合係止されているとともに円筒
部材の傾斜部により管の傾斜部が継手本体の傾斜部に押
圧されているので、管は継手本体に対して軸方向に移動
することができず、管の継手本体に対する抜け止めを効
果的に行うことができる。また、円筒部材の傾斜部によ
り管の傾斜部が継手本体の傾斜部に、面接触により、押
圧されて密着しているので、シール性が良い。また、上
記凸部が、管の端部端面側に管軸方向と直交しかつ上記
管の凹部内面と面接触可能な垂直面を有するとともに、
管の上記端部とは反対側に管の端部を案内する傾斜面を
有するようにすれば、継手本体の凸部が管の凹部に入り
込んだとき、凸部の垂直面が管の凹部の端部端面側の垂
直面に面接触するので、管を継手本体から効果的に抜け
出にくくすることができる。また、管の先端の円筒部に
テーパ部を有するようにすれば、継手本体の接続端部に
挿入するとき、継手本体の傾斜部と共働して管を円滑に
円筒部に案内するとともに、凸部を無理なく乗り越える
ことができ、作業性に優れたものとなる。According to the structure of the present invention, temperature fluctuation occurs due to the fluid passing through the pipe or the environment around the pipe,
Even if the end of the pipe tries to return to the original simple cylindrical shape and the end of the pipe comes out from the connecting end of the joint body, the convex portion of the joint body is fitted and locked in the concave portion of the pipe. Since the inclined portion of the pipe is pressed against the inclined portion of the joint body by the inclined portion of the cylindrical member, the pipe cannot move in the axial direction with respect to the joint body, which effectively prevents the pipe from coming off from the joint body. Can be done. Further, the inclined portion of the pipe is pressed and brought into close contact with the inclined portion of the joint body by the inclined portion of the cylindrical member due to the surface contact, so that the sealing property is good. Further, the convex portion has a vertical surface orthogonal to the pipe axial direction on the end facet side of the pipe, and having a vertical surface capable of surface contact with the inner surface of the concave portion of the pipe,
By providing an inclined surface that guides the end of the pipe on the side opposite to the end of the pipe, when the convex part of the joint body enters the concave part of the pipe, the vertical surface of the convex part becomes the concave part of the pipe. Since the end face comes into surface contact with the vertical face on the end face side, it is possible to effectively prevent the pipe from coming out of the joint body. Also, if the cylindrical portion at the tip of the pipe has a taper portion, when the pipe is inserted into the connecting end portion of the joint body, the pipe is smoothly guided in cooperation with the inclined portion of the joint body, It is possible to overcome the convex portion without difficulty, resulting in excellent workability.
【０００６】[0006]
【実施例】以下に、本発明にかかる実施例を図１〜図１
０に基づいて詳細に説明する。本実施例にかかる管継手
は、図１に示すように、フッソ樹脂製の管４の端部をフ
ッソ樹脂製の継手本体１に嵌合したのち、管締付用円筒
部材、例えばフッソ樹脂製袋ナット２で、上記管４の端
部を継手本体１に締め付けるようにしている。上記管４
は、その端部に、径方向外側に膨れた傾斜部４ａと、該
傾斜部４ａに連続した円筒部とを有している。上記円筒
部は、円筒部本体４ｂと、該円筒部本体４ｂに連続して
径方向外側に膨れるテーパ部４ｃとより構成し、該テー
パ部４ｃの内面に周方向に延びる凹部４ｅが形成され
る。該凹部４ｅは、好ましくは断面矩形であって、その
管軸方向の両端面は管軸方向と直交する垂直面とするの
が管４の抜け止めを図る上でより好ましい。管４の中心
を貫通する貫通穴４ｄは継手本体１の貫通穴１ｄに連通
して流体が流れる。なお、管４の円筒部本体４ｂの内径
寸法は継手本体１の円筒部１ｂの外径寸法と大略同一か
若干小さくして管４の円筒部本体４ｂの内周面が継手本
体１の円筒部１ｂの外周面により密着しやすくしてもよ
い。また、管４の円筒部本体４ｂの外径寸法は袋ナット
２の円筒部２ｂの内径寸法と大略同一か若干小さくして
管４の円筒部本体４ｂの外周面が袋ナット２の円筒部２
ｂの内周面により密着しやすくしてもよい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described below with reference to FIGS.
A detailed description will be given based on 0. As shown in FIG. 1, the pipe joint according to the present embodiment is obtained by fitting an end portion of a pipe 4 made of a fluororesin into a joint body 1 made of a fluororesin, and then a cylindrical member for fastening a pipe, for example, made of a fluororesin. The end portion of the pipe 4 is fastened to the joint body 1 with the cap nut 2. Above tube 4
Has an inclined portion 4a that bulges outward in the radial direction and a cylindrical portion that is continuous with the inclined portion 4a at its end. The cylindrical portion is composed of a cylindrical portion main body 4b and a tapered portion 4c which swells radially outwardly continuously from the cylindrical portion main body 4b, and a concave portion 4e extending in the circumferential direction is formed on the inner surface of the tapered portion 4c. . The recess 4e preferably has a rectangular cross section, and both end surfaces in the tube axis direction are preferably vertical surfaces orthogonal to the tube axis direction in order to prevent the tube 4 from coming off. The through hole 4d penetrating the center of the pipe 4 communicates with the through hole 1d of the joint body 1 and the fluid flows. The inner diameter of the cylindrical portion main body 4b of the pipe 4 is substantially the same as or slightly smaller than the outer diameter of the cylindrical portion 1b of the joint main body 1 so that the inner peripheral surface of the cylindrical portion main body 4b of the pipe 4 has a cylindrical portion of the joint main body 1. The outer peripheral surface of 1b may be easily adhered. The outer diameter of the cylindrical body 4b of the tube 4 is substantially the same as or slightly smaller than the inner diameter of the cylindrical portion 2b of the cap nut 2 so that the outer peripheral surface of the cylindrical body 4b of the pipe 4 has the cylindrical portion 2 of the cap nut 2.
The inner peripheral surface of b may be more easily adhered.
【０００７】上記継手本体１は、その接続端部におい
て、上記管４の傾斜部４ａの内面が接触可能な傾斜部１
ａと、上記管４の円筒部本体４ｂの内面及び上記テーパ
部４ｃの内面が接触可能な円筒部１ｂと、おねじ部１ｃ
とを連続して形成している。この円筒部１ｂには、該円
筒部１ｂより径方向外向きに突出して上記凹部４ｅに嵌
合係止可能で、かつ円周方向に延びる凸部１ｅが形成さ
れている。この凸部１ｅは図７に拡大してその断面を示
すように、管４の端部端面側には管軸方向と直交する垂
直面１ｆを有する一方、該垂直面１ｆに対向して管軸方
向の端部とは反対側には傾斜した傾斜面１ｇを形成して
いる。上記袋ナット２は、その内面に、上記管４の傾斜
部４ａの外面に押圧接触して該傾斜部４ａを上記継手本
体１の傾斜部１ａに密着させる傾斜部２ａと、上記管４
の円筒部本体４ｂ及びテーパ部４ｃを上記継手本体１の
円筒部１ｂに押圧接触させるとともに上記凹部４ｅに上
記継手本体１の凸部１ｅを嵌合させる円筒部２ｂと、上
記継手本体１のおねじ部１ｃに螺合するめねじ部２ｃと
を有する。なお、袋ナット２の傾斜部２ａと継手本体１
の傾斜部１ａの傾斜角度は大略同じにするのが好まし
い。その理由は、大略同じ角度とすることにより、両傾
斜部間で管４の傾斜部４ｃにより広い範囲で挟み付ける
ことができて、シール性をより向上させることができる
からである。The joint body 1 has an inclined portion 1 at its connecting end, which is in contact with the inner surface of the inclined portion 4a of the pipe 4.
a, a cylindrical portion 1b capable of contacting the inner surface of the cylindrical portion main body 4b of the pipe 4 and the inner surface of the tapered portion 4c, and a male screw portion 1c.
And are continuously formed. The cylindrical portion 1b is provided with a convex portion 1e which projects radially outward from the cylindrical portion 1b, can be fitted and locked in the concave portion 4e, and extends in the circumferential direction. As shown in the enlarged cross-section of FIG. 7, the convex portion 1e has a vertical surface 1f on the end face of the tube 4 that is orthogonal to the tube axis direction, while facing the vertical surface 1f. An inclined surface 1g is formed on the side opposite to the end in the direction. The cap nut 2 has, on its inner surface, an inclined portion 2a that presses and contacts the outer surface of the inclined portion 4a of the pipe 4 to bring the inclined portion 4a into close contact with the inclined portion 1a of the joint body 1, and the pipe 4
The cylindrical portion main body 4b and the tapered portion 4c of the joint main body 1 are pressed into contact with the cylindrical portion 1b of the joint main body 1 and the convex portion 1e of the joint main body 1 is fitted into the concave portion 4e. It has a female screw portion 2c that is screwed into the screw portion 1c. In addition, the inclined portion 2a of the cap nut 2 and the joint body 1
It is preferable that the inclination angles of the inclined portions 1a are substantially the same. The reason is that, by setting the angles to be approximately the same, the inclined portions 4c of the pipe 4 can be sandwiched between the inclined portions in a wide range, and the sealing performance can be further improved.
【０００８】上記管４は、図２に示すように、その端部
が予め加熱されたのち、フレア加工治具１０に差し込
む。フレア加工治具１０は、その外周面に、管４の内周
面に嵌合される円筒部１０ｄと、管４の上記傾斜部４ａ
を形成するための傾斜部１０ａと、管４の上記円筒部本
体４ｂを形成するための円筒部１０ｂと、管４の上記テ
ーパ部４ｃを形成するためのテーパ部形成部１０ｃとを
それぞれ連続して備えている。よって、図３に示すよう
に、加熱された管４の端部をフレア加工治具１０に差し
込むだけで、管４に、上記傾斜部４ａ、上記円筒部本体
４ｂ、上記テーパ部４ｃがそれぞれ形成できる。このよ
うにしてできた管４をフレア加工治具１０から取り外し
たのち、図４に示すように、管４のテーパ部４ｃの内面
に、円周方向に延びる上記凹部４ｅを図示しない治具を
使用して溝加工により形成する。この管４を図５に示す
ように継手本体１の接続端部に差し込む。このとき、管
４のテーパ部４ｃは継手本体１の傾斜部１ａの案内によ
り円筒部１ｂの外周面上にかぶさり、さらに、テーパ部
４ｃのテーパ内面により凸部１ｅの傾斜面１ｇに沿って
円滑に案内されて凸部１ｅを乗り越えて、凸部１ｅが管
４の凹部１ｅに少なくとも嵌合しかかる程度まで、管４
を継手本体１に差し込む。このとき、管４のテーパ部４
ｃは図５に示すように継手本体１の円筒部１ｂより浮い
た状態となっている。As shown in FIG. 2, the tube 4 is inserted into the flaring jig 10 after its end is preheated. The flaring jig 10 has, on its outer peripheral surface, a cylindrical portion 10d fitted to the inner peripheral surface of the pipe 4, and the inclined portion 4a of the pipe 4.
The inclined portion 10a for forming the cylindrical portion, the cylindrical portion 10b for forming the cylindrical portion main body 4b of the pipe 4, and the tapered portion forming portion 10c for forming the tapered portion 4c of the pipe 4 are respectively continuous. Are prepared. Therefore, as shown in FIG. 3, the slanted portion 4a, the cylindrical portion main body 4b, and the tapered portion 4c are formed in the pipe 4 by merely inserting the heated end portion of the pipe 4 into the flare processing jig 10. it can. After removing the tube 4 thus formed from the flare processing jig 10, as shown in FIG. 4, a jig (not shown) is provided on the inner surface of the tapered portion 4c of the tube 4 so that the recess 4e extending in the circumferential direction is not shown. It is used and formed by grooving. This pipe 4 is inserted into the connection end of the joint body 1 as shown in FIG. At this time, the tapered portion 4c of the pipe 4 covers the outer peripheral surface of the cylindrical portion 1b by the guide of the inclined portion 1a of the joint body 1, and further, the tapered inner surface of the tapered portion 4c smoothly moves along the inclined surface 1g of the convex portion 1e. To the extent that the convex portion 1e at least fits into the concave portion 1e of the pipe 4 by being guided by the pipe 4 and overcoming the convex portion 1e.
Is inserted into the joint body 1. At this time, the tapered portion 4 of the pipe 4
As shown in FIG. 5, c is in a state of floating above the cylindrical portion 1b of the joint body 1.
【０００９】次に、図１に示すように、管４に予め挿入
しておいた袋ナット２で管４の端部を覆い、袋ナット２
と継手本体１の接続端部との間に管４の端部を挟み込む
ようにして、袋ナット２を回転させて袋ナット２のめね
じ部２ｃを継手本体１のおねじ部１ｃにねじ込む。この
結果、図１に示すように、袋ナット２の傾斜部２ａによ
り管４の傾斜部４ａを継手本体１の傾斜部１ａに押圧接
触させて、両傾斜部２ａ，１ａが傾斜部４ａに密着して
シール効果を奏するようにする。また、袋ナット２の円
筒部２ｂにより管４の円筒部本体４ｂ及びテーパ部４ｃ
を継手本体１の円筒部１ｂに押圧接触させてシール効果
を奏するようにする。このとき、テーパ部４ｃは強制的
に袋ナット２の円筒部２ｂにより継手本体１の円筒部１
ｂに押し付けられるため、その後、袋ナット２を取り外
しても、図６に示すように、テーパ部４ｃが円筒部のよ
うに変形したままとなる。また、このとき、袋ナット２
の円筒部２ｂにより継手本体１の凸部１ｅが管４の凹部
４ｅ内に完全に嵌合係止した状態となる。よって、凸部
１ｅの垂直面１ｆが管４の凹部４ｅの端部端面側の垂直
面に面接触して係止され、管４を継手本体１から抜け出
にくくなる。Next, as shown in FIG. 1, the end portion of the pipe 4 is covered with the cap nut 2 previously inserted into the pipe 4, and the cap nut 2 is inserted.
The cap nut 2 is rotated so that the end of the pipe 4 is sandwiched between the end of the pipe 4 and the connecting end of the joint body 1, and the female screw portion 2c of the cap nut 2 is screwed into the male screw portion 1c of the joint body 1. As a result, as shown in FIG. 1, the slanted portion 2a of the cap nut 2 presses the slanted portion 4a of the pipe 4 into contact with the slanted portion 1a of the joint body 1 so that the slanted portions 2a, 1a are closely attached to the slanted portion 4a. To achieve the sealing effect. Further, the cylindrical portion 2b of the cap nut 2 allows the cylindrical portion main body 4b and the tapered portion 4c of the pipe 4 to be formed.
Is pressed against the cylindrical portion 1b of the joint body 1 so that a sealing effect is produced. At this time, the tapered portion 4c is forcibly forced by the cylindrical portion 2b of the cap nut 2 into the cylindrical portion 1 of the joint body 1.
Since it is pressed against b, even if the cap nut 2 is subsequently removed, the tapered portion 4c remains deformed like a cylindrical portion as shown in FIG. At this time, the cap nut 2
Due to the cylindrical portion 2b, the convex portion 1e of the joint body 1 is completely fitted and locked in the concave portion 4e of the pipe 4. Therefore, the vertical surface 1f of the convex portion 1e is brought into surface contact with the vertical surface of the concave portion 4e of the concave portion 4e on the end face side of the concave portion 4e to be locked, and the pipe 4 is less likely to come out of the joint body 1.
【００１０】上記実施例によれば、管４がその内部を通
る流体又は管周囲の環境等により温度変動が生じて、管
４のテーパ部４ｃが元の単なる円筒形に戻ろうとして
も、継手本体１の凸部１ｅが管４の凹部４ｅ内に嵌合係
止されているとともに袋ナット２の傾斜部２ａにより管
４の傾斜部４ａが継手本体１の傾斜部１ａに押圧されて
いるので、管４は継手本体１に対して軸方向に移動する
ことができず、管４の継手本体１に対する抜け止めを効
果的に行うことができる。また、継手本体１の凸部１ｅ
が管４の凹部４ｅに入り込んだとき、凸部１ｅの垂直面
１ｆが管４の凹部４ｅの端部端面側の垂直面に面接触す
るので、管４を継手本体１から効果的に抜け出にくくす
ることができる。また、袋ナット２の傾斜部２ａにより
管４の傾斜部４ａが継手本体１の傾斜部１ａに、面接触
により、押圧されて密着しているので、シール性が良
い。また、管４の先端にテーパ部４ｃを有するので、継
手本体１の接続端部に挿入するとき、継手本体１の傾斜
部１ａと共働して管４を円滑に円筒部１ｂに案内すると
ともに、凸部１ｅを無理なく乗り越えることができ、作
業性に優れたものとなる。According to the above-mentioned embodiment, even if the tapered portion 4c of the pipe 4 tries to return to the original simple cylindrical shape due to the temperature variation caused by the fluid passing through the pipe 4 or the environment around the pipe, etc. Since the convex portion 1e of the main body 1 is fitted and locked in the concave portion 4e of the pipe 4, and the inclined portion 4a of the pipe 4 is pressed against the inclined portion 1a of the joint main body 1 by the inclined portion 2a of the cap nut 2. The pipe 4 cannot move in the axial direction with respect to the joint body 1, and the pipe 4 can be effectively prevented from coming off from the joint body 1. In addition, the convex portion 1e of the joint body 1
Since the vertical surface 1f of the convex portion 1e comes into surface contact with the vertical surface of the end portion end surface side of the concave portion 4e of the pipe 4 when the concave portion 4e of the pipe 4 comes into contact with the concave portion 4e of the pipe 4, it is difficult to effectively remove the pipe 4 from the joint body 1. can do. Further, the slanted portion 2a of the cap nut 2 presses the slanted portion 4a of the pipe 4 to the slanted portion 1a of the joint main body 1 by surface contact so that the slanted portion 4a is brought into close contact with the slanted portion 4a. Further, since the tip of the pipe 4 has the tapered portion 4c, when the pipe 4 is inserted into the connection end portion of the joint body 1, the pipe 4 cooperates with the inclined portion 1a of the joint body 1 to smoothly guide the pipe 4 to the cylindrical portion 1b. Thus, the convex portion 1e can be easily overcome and the workability is improved.
【００１１】なお、本発明は上記実施例に限定されるも
のではなく、その他種々の態様で実施できる。例えば、
上記凸部１ｅ及び凹部４ｅは、円周方向全部に形成され
る必要はなく、その一部でもよいとともに、円周方向に
限らず、管軸方向と交差する任意の方向に延びるように
してもよい。また、その個数も１に限らず、任意の個数
でよい。また、上記凸部１ｅとしては図７の凸部に限ら
ず、図８に示すように断面矩形の凸部１２、図９に示す
ように断面三角形の凸部１３、図１０に示すように断面
半円形状の凸部１４でもよい。また、管４はテーパ部４
ｃを持たないものでもよく、この場合には凹部４ｅは円
筒部本体４ｂの内周面に形成する。The present invention is not limited to the above embodiment, but can be implemented in various other modes. For example,
The convex portion 1e and the concave portion 4e do not have to be formed in the entire circumferential direction, but may be a part thereof, and may extend not only in the circumferential direction but also in any direction intersecting the tube axis direction. Good. Also, the number is not limited to one, and may be any number. Further, the convex portion 1e is not limited to the convex portion of FIG. 7, and the convex portion 12 having a rectangular cross section as shown in FIG. 8, the convex portion 13 having a triangular cross section as shown in FIG. 9, and the cross section as shown in FIG. It may be a semi-circular convex portion 14. Further, the pipe 4 is the tapered portion 4
It may not have c, and in this case, the concave portion 4e is formed on the inner peripheral surface of the cylindrical body 4b.
【図１】 本発明の一実施例にかかる管継手であって袋
ナットで管を継手本体に締め付けた状態での要部拡大断
面図である。FIG. 1 is an enlarged cross-sectional view of a main part of a pipe joint according to an embodiment of the present invention in a state where a pipe is fastened to a joint body with a cap nut.
【図２】 図１の管の加工を行うため管の端部をフレア
加工治具に差し込み始める状態の説明図である。FIG. 2 is an explanatory view of a state in which the end portion of the tube for starting the processing of the tube of FIG. 1 is started to be inserted into a flare processing jig.
【図３】 図２において管の端部をフレア加工治具に差
し込んだ状態の説明図である。FIG. 3 is an explanatory diagram showing a state in which the end portion of the tube is inserted into a flare processing jig in FIG. 2.
【図４】 図３における加工が終了した管の内周面に溝
加工を施したのち、継手本体に対向させた状態を示す説
明図である。FIG. 4 is an explanatory view showing a state in which a groove is formed on the inner peripheral surface of the pipe after the processing in FIG. 3 and then the tube is opposed to the joint body.
【図５】 図１にかかる継手本体の接続端部に管の端部
を嵌め込んだ状態を示す断面図である。FIG. 5 is a cross-sectional view showing a state where the end portion of the pipe is fitted into the connection end portion of the joint body according to FIG.
【図６】 図５において袋ナットを取り外した状態での
断面図である。FIG. 6 is a cross-sectional view with the cap nut removed in FIG.
【図７】 図１の継手本体の凸部の拡大断面図である。7 is an enlarged cross-sectional view of a convex portion of the joint body of FIG.
【図８】 凸部の変形例を示す拡大断面図である。FIG. 8 is an enlarged cross-sectional view showing a modified example of the convex portion.
【図９】 凸部の他の変形例を示す拡大断面図である。FIG. 9 is an enlarged cross-sectional view showing another modified example of the convex portion.
【図１０】 凸部のさらに他の変形例を示す拡大断面図
である。FIG. 10 is an enlarged cross-sectional view showing still another modified example of the convex portion.
【図１１】 従来の管継手の断面図である。FIG. 11 is a cross-sectional view of a conventional pipe joint.
１…継手本体、１a…傾斜部、１b…円筒部、１c…おね
じ部、１d…貫通穴、１e，１ｆ…垂直面、１ｇ…傾斜
面、２…袋ナット、２a…傾斜部、２b…円筒部、２c…
めねじ部、４…管、４a…傾斜部、４b…円筒部本体、４
ｃ…テーパ部、４ｄ…貫通穴、４ｅ…凹部、１０…フレ
ア加工治具、１２，１３，１４…凸部。DESCRIPTION OF SYMBOLS 1 ... Joint body, 1a ... Inclined part, 1b ... Cylindrical part, 1c ... Male part, 1d ... Through hole, 1e, 1f ... Vertical surface, 1g ... Inclined surface, 2 ... Cap nut, 2a ... Inclined part, 2b ... Cylindrical part, 2c ...
Female thread part, 4 ... Pipe, 4a ... Inclined part, 4b ... Cylindrical part body, 4
c ... taper portion, 4d ... through hole, 4e ... concave portion, 10 ... flare processing jig, 12, 13, 14 ... convex portion.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 竹村 禎男 奈良県大和郡山市今国府町６番２号 東邦 化成株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sadao Takemura 6-2 Imakunifucho, Yamatokoriyama City, Nara Toho Kasei Co., Ltd.
Claims (3)
したのち管締付用円筒部材（２）で上記管の端部を上記
継手本体に締め付けるようにした管継手において、 上記管（４）は、その端部に、径方向外側に膨れた傾斜
部（４ａ）と、該傾斜部に連続した円筒部（４ｂ，４
ｃ）と、該円筒部（４ｂ，４ｃ）の内面に形成されかつ
周方向に延びる凹部（４ｅ）とを有し、 上記継手本体（１）は、上記管（４）の傾斜部（４ａ）
の内面が接触可能な傾斜部（１ａ）と、上記管（４）の
円筒部（４ｂ，４ｃ）の内面が接触可能な円筒部（１
ｂ）と、上記凹部（４ｅ）に嵌合係止可能な凸部（１
ｅ）と、ねじ部（１ｃ）とを有し、 上記円筒部材（２）は、その内面に、上記管（４）の傾
斜部（４ａ）の外面に押圧接触して該傾斜部を上記継手
本体（１）の傾斜部（１ａ）に密着させる傾斜部（２
ａ）と、上記管（４）の円筒部（４ｂ，４ｃ）を上記継
手本体（１）の円筒部（１ｂ）に押圧接触させるととも
に上記凹部（４ｅ）に上記継手本体（１）の凸部（１
ｅ）を嵌合させる円筒部（２ｂ）と、上記継手本体
（１）のねじ部（１ｃ）に螺合するねじ部（２ｃ）とを
有するようにしたことを特徴とする管継手。1. A pipe joint in which the end portion of the pipe (4) is fitted in the joint body (1) and then the end portion of the pipe is fastened to the joint body by a pipe fastening cylindrical member (2). The pipe (4) has an inclined portion (4a) bulging radially outward at its end and a cylindrical portion (4b, 4) continuous to the inclined portion.
c) and a concave portion (4e) formed on the inner surface of the cylindrical portion (4b, 4c) and extending in the circumferential direction, the joint body (1) includes the inclined portion (4a) of the pipe (4).
(1a) that can contact the inner surface of the cylindrical portion (1a) that can contact the inner surface of the cylindrical portion (4b, 4c) of the pipe (4).
b) and the convex portion (1) that can be fitted and locked in the concave portion (4e).
e) and a threaded portion (1c), the cylindrical member (2) presses and contacts the inner surface of the cylindrical member (2) with the outer surface of the inclined portion (4a) of the pipe (4). Inclined part (2) to be in close contact with the inclined part (1a) of the main body (1)
a) and the cylindrical portion (4b, 4c) of the pipe (4) are pressed into contact with the cylindrical portion (1b) of the joint body (1), and the convex portion of the joint body (1) is provided in the concave portion (4e). (1
The pipe joint is characterized in that it has a cylindrical portion (2b) into which e) is fitted and a screw portion (2c) screwed into the screw portion (1c) of the joint body (1).
体（４ｂ）と、該円筒部本体（４ｂ）に連続して径方向
外側に膨れるテーパ部（４ｃ）とより構成し、該テーパ
部（４ｃ）の内面に上記凹部（４ｅ）が形成されるよう
にした請求項１に記載の管継手。2. The cylindrical portion (4b, 4c) comprises a cylindrical portion main body (4b) and a tapered portion (4c) which swells radially outward continuously from the cylindrical portion main body (4b), The pipe joint according to claim 1, wherein the recessed portion (4e) is formed on the inner surface of the tapered portion (4c).
管軸方向と直交しかつ上記管の凹部内面と面接触可能な
垂直面（１ｆ）を有するとともに、管の上記端部とは反
対側に管の端部を案内する傾斜面（１ｇ）を有するよう
にした請求項１又は２に記載の管継手。3. The convex portion (1e) has a vertical surface (1f) on the end face of the end of the pipe, which is orthogonal to the pipe axial direction and is in surface contact with the inner surface of the recess of the pipe, and the end of the pipe. The pipe joint according to claim 1 or 2, wherein an inclined surface (1g) for guiding the end of the pipe is provided on the side opposite to the portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4306837A JPH07103949B2 (en) | 1992-11-17 | 1992-11-17 | Pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4306837A JPH07103949B2 (en) | 1992-11-17 | 1992-11-17 | Pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06159574A true JPH06159574A (en) | 1994-06-07 |
| JPH07103949B2 JPH07103949B2 (en) | 1995-11-08 |
Family
ID=17961857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4306837A Expired - Fee Related JPH07103949B2 (en) | 1992-11-17 | 1992-11-17 | Pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07103949B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11201363A (en) * | 1998-01-07 | 1999-07-30 | Nippon Kokan Pipe Fittings Mfg Co Ltd | Pipe joint |
| US6435570B1 (en) | 1998-11-06 | 2002-08-20 | Toho Kasei Co., Ltd. | Resin pipe joint |
| KR100526165B1 (en) * | 2001-03-13 | 2005-11-03 | 주식회사 우일하이테크 | Pipe Joint Body |
| US6971683B2 (en) * | 2003-07-23 | 2005-12-06 | Flowell Corporation | Joint for tubings |
| JP2011012691A (en) * | 2009-06-30 | 2011-01-20 | Nippon Pillar Packing Co Ltd | Resin pipe joint |
| ITBO20090535A1 (en) * | 2009-08-06 | 2011-02-07 | Kme Italy S P A | PIPE CONNECTION DEVICE |
| ITBO20090536A1 (en) * | 2009-08-06 | 2011-02-07 | Kme Italy S P A | CONNECTION DEVICE FOR TUBES |
| JP2011190832A (en) * | 2010-03-12 | 2011-09-29 | Nippon Pillar Packing Co Ltd | Resin pipe joint |
| US20160003391A1 (en) * | 2014-07-07 | 2016-01-07 | Smc Corporation | Pipe joint |
| JP2017015109A (en) * | 2015-06-29 | 2017-01-19 | 株式会社フジキン | Joint for resin tube |
| JP2021060057A (en) * | 2019-10-04 | 2021-04-15 | 三菱ケミカルインフラテック株式会社 | Structure and method for connecting pipe joint to pipe |
-
1992
- 1992-11-17 JP JP4306837A patent/JPH07103949B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11201363A (en) * | 1998-01-07 | 1999-07-30 | Nippon Kokan Pipe Fittings Mfg Co Ltd | Pipe joint |
| US6435570B1 (en) | 1998-11-06 | 2002-08-20 | Toho Kasei Co., Ltd. | Resin pipe joint |
| KR100526165B1 (en) * | 2001-03-13 | 2005-11-03 | 주식회사 우일하이테크 | Pipe Joint Body |
| US6971683B2 (en) * | 2003-07-23 | 2005-12-06 | Flowell Corporation | Joint for tubings |
| JP2011012691A (en) * | 2009-06-30 | 2011-01-20 | Nippon Pillar Packing Co Ltd | Resin pipe joint |
| ITBO20090535A1 (en) * | 2009-08-06 | 2011-02-07 | Kme Italy S P A | PIPE CONNECTION DEVICE |
| ITBO20090536A1 (en) * | 2009-08-06 | 2011-02-07 | Kme Italy S P A | CONNECTION DEVICE FOR TUBES |
| JP2011190832A (en) * | 2010-03-12 | 2011-09-29 | Nippon Pillar Packing Co Ltd | Resin pipe joint |
| US20160003391A1 (en) * | 2014-07-07 | 2016-01-07 | Smc Corporation | Pipe joint |
| US11174972B2 (en) | 2014-07-07 | 2021-11-16 | Smc Corporation | Pipe joint |
| JP2017015109A (en) * | 2015-06-29 | 2017-01-19 | 株式会社フジキン | Joint for resin tube |
| JP2021060057A (en) * | 2019-10-04 | 2021-04-15 | 三菱ケミカルインフラテック株式会社 | Structure and method for connecting pipe joint to pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07103949B2 (en) | 1995-11-08 |
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