JPH07139670A - Packing for pipe fitting - Google Patents

Abstract

PURPOSE:To shorten extension length of a valve part when a spigot is inserted, and improve sealing function by forming a protruded part to prohibit elongation to the depth side integrally at a root part of the valve part protruded semicircularly to the depth side. CONSTITUTION:In performing pipe connection by inserting an insertion mouth 5 to a socket 1 on which a packing 2 for a pipe fitting, the packing 2 for the pipe fitting is compressed between the receiving mouth 1 and an outer circumferential surface 5a of the spigot 5 to achieve expected sealing function. A valve part 2B is pulled to be elongated toward the depth side when the spigot 5 is inserted, where an inclined protruded part 2C positioned on the elongated side prohibits elongation of the valve part 2B, and elongation length 1 is shortened. Deterioration of compression ratio of the valve part can thus be prevented, thereby the sealing function (watertight performance) can be maintained high.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、挿口の外周面と受口の
内周面との間で圧縮されることによりシール機能を発揮
し、たとえば配管用継ぎ手に使用されるところの管継ぎ
手用パッキンに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention exhibits a sealing function by being compressed between the outer peripheral surface of an insertion opening and the inner peripheral surface of a receiving opening, and is used for pipe fittings, for example. It is related to packing.

【０００２】[0002]

【従来の技術】従来、この種の管継ぎ手用パッキンとし
ては、たとえば図７に示す構造が提供されている。すな
わち受口10の内周面10ａに固定されるリング状の管継ぎ
手用パッキン11はゴムなどからなり、止水ならびに抜け
止め用のヒレ部11Ａが管端面側に形成されるとともに、
奥側に水密性向上のためのバルブ部11Ｂが形成されてい
る。このバルブ部11Ｂは、その外面11ｂが断面で半円状
に形成され、そして外面11ｂの内周面10ａへの奥側付け
根点12に対して、外面11ｂの最奥点13が奥部側に位置す
るように、奥部側へ膨らみ状に突出させることで、つぶ
し代を形成している。2. Description of the Related Art Conventionally, as a packing for a pipe joint of this type, for example, a structure shown in FIG. 7 has been provided. That is, the ring-shaped pipe joint packing 11 fixed to the inner peripheral surface 10a of the receiving port 10 is made of rubber or the like, and the fins 11A for preventing water and coming off are formed on the pipe end face side, and
A valve portion 11B for improving water tightness is formed on the back side. The outer surface 11b of the valve portion 11B is formed in a semicircular shape in cross section, and the innermost point 12 of the outer surface 11b to the inner peripheral surface 10a is the innermost point 13 of the outer surface 11b on the innermost side. The squeezing margin is formed by projecting in a bulge shape toward the inner side so that the crushing margin is located.

【０００３】このような管継ぎ手用パッキン11を固定し
た受口10に対して、図８に示すように挿口15を差し込ん
で接合したとき、この管継ぎ手用パッキン11が、変形し
ながら挿口15の外周面15ａに圧縮されることになって、
所期のシール機能を発揮する。When the insertion port 15 is inserted and joined to the receiving port 10 to which the packing 11 for the pipe coupling is fixed as shown in FIG. 8, the packing 11 for the pipe coupling is deformed while being inserted. To be compressed to the outer peripheral surface 15a of 15,
Demonstrate the desired sealing function.

【０００４】[0004]

【発明が解決しようとする課題】しかし、上記した従来
構成によると、奥側付け根点12に対して最奥点13が奥部
側に位置するように、バルブ部11Ｂを奥部側へ膨らみ状
に形成してあることから、挿口15を差し込んだときにバ
ルブ部11Ｂが引っ張られ、かなりの長さＬで引き伸ばさ
れることになり、これによりバルブ部11Ｂの圧縮率が低
下してシール機能（水密性能）が低くなるという問題が
あった。However, according to the above-mentioned conventional structure, the valve portion 11B is bulged toward the rear side so that the innermost point 13 is located on the rear side with respect to the rear side root point 12. Therefore, when the insertion port 15 is inserted, the valve portion 11B is pulled and stretched by a considerable length L, which lowers the compression rate of the valve portion 11B and reduces the sealing function ( There was a problem that the watertight performance) was low.

【０００５】本発明の目的とするところは、挿口を差し
込んだときにバルブ部が引き伸ばされる長さを短くし得
る管継ぎ手用パッキンを提供する点にある。An object of the present invention is to provide a packing for a pipe joint which can shorten the length of extension of the valve portion when the insertion opening is inserted.

【０００６】[0006]

【課題を解決するための手段】上記目的を達成すべく本
第１発明の管継ぎ手用パッキンは、奥部側へ半円状に突
出するバルブ部の付け根に、奥部側への伸びを阻止する
突起部分を一体に形成している。In order to achieve the above object, the packing for a pipe joint according to the first aspect of the present invention prevents extension to the back side at the root of a valve portion protruding semi-circularly toward the back side. The protruding portion is formed integrally.

【０００７】そして本第２発明の管継ぎ手用パッキン
は、奥部側へ半円状に突出するバルブ部は、その外面の
最奥点から直線状に突出して、奥側付け根点の前部に、
奥部側への伸びを阻止する伸び阻止部分を一体に形成し
ている。According to the packing for pipe joints of the second aspect of the present invention, the valve portion protruding semi-circularly to the inner side protrudes linearly from the innermost point on the outer surface of the valve portion to the front of the inner root point. ,
A stretch-preventing portion that prevents extension to the back side is integrally formed.

【０００８】[0008]

【作用】上記した本第１発明の構成によると、管継ぎ手
用パッキンを固定した受口または挿口に対して、挿口ま
たは受口を相互に差し込んで管接合を行うとき、この管
継ぎ手用パッキンが、挿口の外周面または受口の内周面
との間で圧縮されることになって、所期のシール機能を
発揮する。その際にバルブ部は、挿口または受口を差し
込んだときに引っ張られ、奥側に引き伸ばされようとす
るが、このとき引き伸ばされる側に位置する突起部分が
バルブ部の引き伸ばしを阻止することになる。According to the structure of the first aspect of the present invention described above, when pipes are joined by inserting the insertion ports or the receiving ports into the receiving ports or the insertion ports to which the packing for the pipe couplings is fixed, this pipe coupling is used. The packing is compressed between the outer peripheral surface of the insertion opening or the inner peripheral surface of the receiving opening, thereby exerting an intended sealing function. At that time, the valve part is pulled when the insertion port or the receiving port is inserted, and tends to be extended to the back side, but the protruding part located on the extended side at this time prevents the extension of the valve part. Become.

【０００９】そして上記した本第２発明の構成による
と、受口に対して挿口を差し込んで管接合を行う際にバ
ルブ部が奥側に引き伸ばされようとするが、このとき引
き伸ばされる側に位置する伸び阻止部分がバルブ部の引
き伸ばしを阻止することになる。According to the second aspect of the present invention described above, when the insertion portion is inserted into the receiving opening to join the pipes, the valve portion tends to be extended to the back side. At this time, the valve portion is extended to the extended side. The stretch-preventing portion located prevents the valve portion from being stretched.

【００１０】[0010]

【実施例】以下に本発明の第一の実施例を図１〜図３に
基づいて説明する。図１、図２において、たとえば受口
１の内周面１ａに固定されるリング状の管継ぎ手用パッ
キン２は、止水ならびに抜け止め用のヒレ部２Ａが管端
面側に形成されるとともに、奥部側に水密性向上のため
のバルブ部２Ｂが形成されている。このバルブ部２Ｂは
ゴムなどからなり、その奥側の外面２ｂが断面で半円状
に形成され、そして付け根には、奥部側への伸びを阻止
する傾斜形突起部分２Ｃが一体に形成されている。ここ
で傾斜形突起部分２Ｃは、外面２ｂの巻き込み中間位置
から奥部側へ傾斜して突出しており、そして内周面１ａ
への奥側付け根点３を、外面２ｂの最奥点４とほぼ同じ
位置としている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. In FIG. 1 and FIG. 2, for example, in a ring-shaped pipe joint packing 2 fixed to the inner peripheral surface 1a of the receiving port 1, a fin portion 2A for preventing water and coming off is formed on the pipe end face side, and A valve portion 2B for improving water tightness is formed on the inner side. The valve portion 2B is made of rubber or the like, an outer surface 2b on the inner side thereof is formed in a semicircular shape in section, and an inclined projection portion 2C for preventing extension to the inner side is integrally formed at the base. ing. Here, the inclined projection portion 2C is inclined and protrudes from the winding intermediate position of the outer surface 2b toward the inner side, and the inner peripheral surface 1a.
The base point 3 on the back side is substantially the same as the innermost point 4 on the outer surface 2b.

【００１１】このような管継ぎ手用パッキン２を固定し
た受口１に対して、図３に示すように挿口５を差し込ん
で管接合を行うとき、この管継ぎ手用パッキン２が、挿
口５の外周面５ａとの間で圧縮されることになって、所
期のシール機能を発揮する。その際にバルブ部２Ｂは、
挿口５を差し込んだときに引っ張られ、奥側に引き伸ば
されようとするが、このとき引き伸ばされる側に位置す
る傾斜形突起部分２Ｃがバルブ部２Ｂの引き伸ばしを阻
止することになり、以て引き伸ばされる長さｌが短くな
ってバルブ部２Ｂの圧縮率は低下せず、シール機能（水
密性能）は低くならない。As shown in FIG. 3, when the pipe joint is performed by inserting the insertion port 5 into the receiving port 1 to which the pipe coupling packing 2 is fixed, the pipe coupling packing 2 is inserted into the insertion port 5. By being compressed with the outer peripheral surface 5a, the desired sealing function is exhibited. At that time, the valve portion 2B is
When the insertion port 5 is inserted, it is pulled and tends to be extended to the back side. At this time, the inclined projection portion 2C located on the side to be extended prevents the valve portion 2B from being extended, and thus the extended portion is extended. The length l to be shortened is not shortened, the compression rate of the valve portion 2B is not lowered, and the sealing function (watertight performance) is not lowered.

【００１２】図４、図５は本発明の第二の実施例を示す
もので、バルブ部２Ｂは、その奥側の外面２ｂが断面で
半円状に形成され、そして付け根には、奥部側への伸び
を阻止する矩形突起部分２Ｄが一体に形成されている。
この矩形突起部分２Ｃは、外面２ｂの巻き込み中間位置
から奥部側へ突出しており、そして内周面１ａへの奥側
付け根点３を、外面２ｂの最奥点４とほぼ同じ位置とし
ている。FIG. 4 and FIG. 5 show a second embodiment of the present invention. The valve portion 2B has an outer surface 2b on the inner side thereof formed in a semicircular shape in cross section, and the inner portion of the valve portion 2B is formed at the base. The rectangular protrusion portion 2D that prevents extension to the side is integrally formed.
The rectangular protrusion 2C projects from the winding intermediate position of the outer surface 2b toward the inner side, and the rear side root point 3 to the inner peripheral surface 1a is substantially the same as the innermost point 4 of the outer surface 2b.

【００１３】この第二の実施例において、受口１に対し
て挿口５を差し込んで管接合を行うとき、この管継ぎ手
用パッキン２が、挿口５の外周面５ａとの間で圧縮さ
れ、その際にバルブ部２Ｂは奥側に引き伸ばされようと
するが、このとき引き伸ばされる側に位置する矩形突起
部分２Ｄがバルブ部２Ｂの引き伸ばしを阻止することに
なる。In the second embodiment, when the insertion port 5 is inserted into the receiving port 1 to join the pipes, the pipe joint packing 2 is compressed between the outer peripheral surface 5a of the insertion port 5. At that time, the valve portion 2B tries to be stretched to the back side, but the rectangular protrusion portion 2D located on the stretched side at this time prevents the valve portion 2B from being stretched.

【００１４】図６は本発明の第三の実施例を示すもの
で、バルブ部２Ｂは、その奥側の外面２ｂが断面で半円
状に形成され、そして、外面２ｂの最奥点４から直線状
に突出させて、奥側付け根点３の前部に、奥部側への伸
びを阻止する伸び阻止部分２Ｅが一体に形成されてい
る。ここで内周面１ａへの奥側付け根点３は、最奥点４
とほぼ同じ位置となる。FIG. 6 shows a third embodiment of the present invention. In the valve portion 2B, the outer surface 2b on the inner side is formed in a semicircular shape in cross section, and from the innermost point 4 of the outer surface 2b. An extension preventing portion 2E is formed integrally with the front portion of the rear-side base point 3 so as to project in a straight line shape and to prevent extension to the rear side. Here, the root side base point 3 to the inner peripheral surface 1a is the innermost point 4
It is almost the same position as.

【００１５】この第三の実施例において、受口１に対し
て挿口５を差し込んで管接合を行うとき、この管継ぎ手
用パッキン２が、挿口５の外周面５ａとの間で圧縮さ
れ、その際にバルブ部２Ｂは奥側に引き伸ばされようと
するが、このとき引き伸ばされる側に位置する伸び阻止
部分２Ｅがバルブ部２Ｂの引き伸ばしを阻止することに
なる。In the third embodiment, when the insertion port 5 is inserted into the receiving port 1 to join the pipes, the pipe joint packing 2 is compressed with the outer peripheral surface 5a of the insertion port 5. At that time, the valve portion 2B tends to be stretched to the back side, but at this time, the stretch blocking portion 2E located on the stretched side blocks the stretch of the valve portion 2B.

【００１６】上記した各実施例では、管継ぎ手用パッキ
ン２を受口１の内周面１ａに固定しているが、これは継
ぎ手用パッキン２を挿口５の外周面５ａに固定し、バル
ブ部２Ｂを、受口１の内周面１ａとの間で圧縮させる形
式であってもよい。In each of the above-mentioned embodiments, the packing 2 for the pipe joint is fixed to the inner peripheral surface 1a of the receiving port 1, but the packing 2 for the joint is fixed to the outer peripheral surface 5a of the insertion port 5, The part 2B may be compressed with the inner peripheral surface 1a of the receiving port 1.

【００１７】[0017]

【発明の効果】上記構成の本第１発明によると、挿口と
受口を相互に差し込んで管接合を行うとき、バルブ部が
引っ張られて奥側に引き伸ばされようとすることを、引
き伸ばされる側に位置する突起部分で阻止することがで
き、引き伸ばされる長さが短くなって、バルブ部の圧縮
率の低下を防止できるとともに、シール機能（水密性
能）を高く維持できる。According to the first aspect of the present invention having the above-described structure, when the insertion port and the receiving port are inserted into each other to join the pipes, the valve portion is pulled so that the valve portion tends to be extended to the back side. It is possible to prevent it by the protruding portion located on the side, the length to be stretched is shortened, it is possible to prevent the compression ratio of the valve portion from being lowered, and it is possible to maintain a high sealing function (watertight performance).

【００１８】そして上記構成の本第２発明によると、バ
ルブ部が引っ張られて奥側に引き伸ばされようとするこ
とを、引き伸ばされる側に位置する伸び阻止部分で阻止
することができ、さらに直線状形状により全体成形を容
易に行うことができる。Further, according to the second aspect of the present invention having the above-mentioned structure, it is possible to prevent the valve portion from being pulled and extended toward the back side by the extension preventing portion located on the stretched side, and further the straight line shape. Due to the shape, the entire molding can be easily performed.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の第一の実施例を示し、管接合前の要部
の断面図である。FIG. 1 is a cross-sectional view of a main part before pipe joining, showing a first embodiment of the present invention.

【図２】同管接合前の管継ぎ手パッキンの断面図であ
る。FIG. 2 is a cross-sectional view of a pipe joint packing before joining the pipes.

【図３】同管接合時の要部の断面図である。FIG. 3 is a cross-sectional view of a main part when joining the pipes.

【図４】本発明の第二の実施例を示し、管接合前の要部
の断面図である。FIG. 4 is a cross-sectional view of a main part before pipe joining, showing a second embodiment of the present invention.

【図５】同管接合前の管継ぎ手パッキンの断面図であ
る。FIG. 5 is a cross-sectional view of a pipe joint packing before joining the pipes.

【図６】本発明の第三の実施例を示し、管接合前の要部
の断面図である。FIG. 6 is a sectional view of an essential part before pipe joining, showing a third embodiment of the present invention.

【図７】従来例を示し、管接合前の要部の断面図であ
る。FIG. 7 is a cross-sectional view of a main part before joining pipes, showing a conventional example.

【図８】同管接合時の要部の断面図である。FIG. 8 is a cross-sectional view of a main part at the time of joining the pipes.

【符号の説明】[Explanation of symbols]

１ 受口 １ａ 内周面 ２ 管継ぎ手用パッキン ２Ａ ヒレ部 ２Ｂ バルブ部 ２ｂ 外面 ２Ｃ 傾斜形突起部分 ２Ｄ 矩形突起部分 ２Ｅ 伸び阻止部分 ３ 奥側付け根点 ４ 最奥点 ５ 挿口 ５ａ 外周面 ｌ 引き伸ばされる長さ 1 Receptacle 1a Inner peripheral surface 2 Packing for pipe joint 2A Fin part 2B Valve part 2b Outer surface 2C Inclined protrusion part 2D Rectangular protrusion part 2E Expansion prevention part 3 Innermost root point 5 Innermost point 5 Insertion port 5a Outer peripheral surface l Stretched Length

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 挿口の外周面と受口の内周面との間で圧
縮されることによりシール機能を発揮する管継ぎ手用パ
ッキンであって、奥部側へ半円状に突出するバルブ部の
付け根に、奥部側への伸びを阻止する突起部分を一体に
形成したことを特徴とする管継ぎ手用パッキン。1. A packing for a pipe joint, which exhibits a sealing function by being compressed between the outer peripheral surface of the insertion opening and the inner peripheral surface of the receiving opening, the valve protruding semi-circularly toward the rear side. A packing for a pipe joint, characterized in that a projection portion for preventing extension to the back side is integrally formed at the base of the portion. 【請求項２】 挿口の外周面と受口の内周面との間で圧
縮されることによりシール機能を発揮する管継ぎ手用パ
ッキンであって、奥部側へ半円状に突出するバルブ部
は、その外面の最奥点から直線状に突出して、奥側付け
根点の前部に、奥部側への伸びを阻止する伸び阻止部分
を一体に形成したことを特徴とする管継ぎ手用パッキ
ン。2. A packing for a pipe joint, which exhibits a sealing function by being compressed between the outer peripheral surface of the insertion opening and the inner peripheral surface of the receiving opening, the valve protruding semi-circularly toward the back side. For pipe joints, the part protrudes linearly from the deepest point on the outer surface, and an extension preventing part that prevents extension to the back side is integrally formed at the front part of the rear side root point. Packing.