JP3703702B2

JP3703702B2 - Annular packing

Info

Publication number: JP3703702B2
Application number: JP2000288211A
Authority: JP
Inventors: 昭博清水
Original assignee: Mitsubishi Plastics Inc
Current assignee: Mitsubishi Chemical Corp
Priority date: 2000-09-22
Filing date: 2000-09-22
Publication date: 2005-10-05
Anticipated expiration: 2020-09-22
Also published as: JP2002098274A

Description

【０００１】
【発明の属する技術分野】
本発明は、Ｔ字或いはＹ字継手等の受口に設けられたパッキン装着溝に嵌め込んで使用する環状パッキンに関する。
【０００２】
【従来の技術及びその問題点】
従来からも、Ｔ字或いはＹ字継手等の受口に設けたパッキン装着溝に、ゴム製の環状パッキンを嵌め込んで、当該継手受口に合成樹脂管等を伸縮及び角度自在に接続して接合部からの流体の漏洩を防止していた。
また、複数の受口を有するＴ字継手等において、その受口の一つを使用しない場合は、この受口のパッキン装着溝に環状パッキンを嵌め込ん後、当該パッキン内に閉塞用キャップを装着して閉塞することも行われていた。
【０００３】
これらに使用されるパッキンの構造としては、例えば図４に断面図で示す如く、環状のパッキン本体５と、当該パッキン本体の内周に軸中心方向に傾斜したリップ部６とからなり、かつ当該リップ部６の先端外周面に環状突起６１を設けることによりパッキンのシール効果を高めた環状パッキンが知られている。
【０００４】
この環状パッキンの本体５を、例えば、図３に断面図で示す如くＴ字継手３のパッキン装着溝３１に嵌め込んだ後、閉塞用のキャップ４を環状パッキン内に装着すると、リップ部６は図４に二点鎖線で示した状態に変形して環状突起６１が継手３の内壁に圧接される。
そして、継手３の内壁とリップ部６及び突起６１の外面によって密封室Ｒ−２が形成され、その結果キャップ４を抜き取ってもリップ部６がその弾性力では実線の前の状態に戻ることなく依然として密封室Ｒ−２が形成された密閉状態で維持されることがある。
したがって、この状態でリップ部６の内面に接続すべき管体の差口を挿入すると、リップ部６の内面と接続すべき管体の差口外面との圧接力が弱くなりパッキンの漏洩防止効果の性能が低下する原因になっていた。
【０００５】
【課題を解決する手段】
本発明は、上記問題を解決した環状パッキンを提供しようとするものでその要旨は、（１）環状のパッキン本体と、当該パッキン本体の内周の一端部から折り返され軸中心方向に傾斜したリップ部とからなる環状パッキンであって、リップ部の先端外周面には周方向に分割された環状突起を設けたことを特徴とする環状パッキンである。
（２）環状のパッキン本体と、当該パッキン本体の内周の一端部から折り返され軸中心方向に傾斜したリップ部とからなる環状パッキンであって、リップ部の先端外周面に環状突起を設け、該環状突起に凹凸を設けたことを特徴とする環状パッキンである。
【０００６】
【発明の実施の形態】
以下、本発明の実施例を図面に基づいて詳細に説明する。
図１は本発明の環状パッキンの断面図、図２は図１のII−II矢視図、図３は本発明の環状パッキンの使用状態図である。
【０００７】
図１において、１はゴム製よりなる環状のパッキン本体であり、当該パッキン本体１はＴ字継手３のパッキン装着溝３１に装着される。
２はパッキン本体１の内周の一端から折り返され軸中心方向に傾斜したリップ部であり、このパッキン本体１及びリップ部２の両部材によって本発明の環状パッキンが構成されている。
そして、リップ部２の先端外周面には周方向に分割された環状突起２１が設けられている。
この環状突起２１は図２に示す如く、１本〜複数本のスリット２２によって周方向に分割されてリップ部２の先端外周面に設けられている。
なお当該環状突起２１は、接続工程において、リップ部２と当該リップ部２に挿入された接続管との圧接力を高めるために設けるものである。
【０００８】
次に、本発明の環状パッキンをＴ字継手に装着して使用する手順を図１に基づいて詳述する。
環状のパッキン本体１を、Ｔ字継手３のパッキン装着溝３１内に嵌め込んだ後、閉塞用キャップ４を環状パッキン内に挿入すると、リップ部２は二点鎖線の状態に変形して環状突起２１は継手３内壁に圧接され、この圧接力によってリップ部２を内側に押し戻そうとする反力が生じる。
その結果、リップ部２の内面とキャップ４の外面との圧接力が増して、この接触面からの流体等の漏洩防止効果が向上する。
【０００９】
また、継手３の内壁とリップ部２及び突起２１の外面によって区画室Ｒ−１が形成されるが、この区画室Ｒ−１はスリット２２を介して継手３内と連通しているので密封状態にはならない。
したがって、区画室Ｒ−１は密封状態に維持されないのでキャップ４を抜き取る場合に、リップ部２がその弾性力で徐々に縮径しも区画室Ｒ−１内にスリット２２を通して空気が流入し、当該区画室は真空状態になることがなくリップ部２は完全に前の実線の状態に戻る。
再度、この受口に差口管を挿入しても、リップ部２の内面と差口管の外面との圧接力が弱まることがないのでパッキン性能の低下は生じない。
【００１０】
上記の実施例では、区画室Ｒ−１が密封状態となるのを防止するために、リップ部２の先端外周面に周方向に分割された環状突起２１を設けたものを示したが、この環状突起２１を周方向に分割する代わりに当該環状突起２１が継手３の内壁と圧接する面に周方向に等分布に凹凸を設けても同様の効果を得ることが出来る。
【００１１】
図３に、Ｔ字継手３のパッキン装着溝３１内に本発明の環状パッキンを嵌め込んで使用し、更に閉塞用キャップ４を当該環状パッキン内に挿入する場合の態様を示した。
【００１２】
【発明の効果】
本発明の環状パッキンは、伸縮及び角度自在な管継手用のパッキンとして最適であり、受口部と差口部との接合部分に介在された本発明の環状パッキンの内・外周面は、リップ部の先端外周面に周方向に分割された環状突起またはリップ部の先端外周面に環状突起と当該環状突起に凹凸を設けることにより、常に高い圧接力が得られるので管同士の伸縮及び接合角度の変化の際に管内の流体が漏洩することがない等優れた効果を有している。
【図面の簡単な説明】
【図１】本発明の環状パッキンの断面図。
【図２】図１のII-II矢視図。
【図３】本発明の環状パッキンの使用状態図。
【図４】従来の環状パッキンの断面図
【符号の説明】
１環状のパッキン本体
２リップ部
２１環状突起
２２スリット[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an annular packing that is used by being fitted in a packing mounting groove provided in a receiving port such as a T-shaped or Y-shaped joint.
[0002]
[Prior art and its problems]
Conventionally, a rubber annular packing is fitted into a packing mounting groove provided in a T-shaped or Y-shaped joint receiving port, and a synthetic resin pipe or the like is connected to the joint receiving port in an expandable and angular manner. The fluid leakage from the joint was prevented.
In addition, when one of the receiving ports is not used in a T-shaped joint having a plurality of receiving ports, an annular packing is fitted in the packing mounting groove of the receiving port, and then a closing cap is mounted in the packing. Then it was also blocked.
[0003]
For example, as shown in a sectional view in FIG. 4, the packing structure used for these includes an annular packing body 5 and a lip portion 6 inclined in the axial center direction on the inner periphery of the packing body. An annular packing in which the sealing effect of the packing is enhanced by providing an annular protrusion 61 on the outer peripheral surface of the tip of the lip portion 6 is known.
[0004]
When the annular packing main body 5 is fitted into the packing mounting groove 31 of the T-shaped joint 3, for example, as shown in a cross-sectional view in FIG. The ring-shaped protrusion 61 is pressed against the inner wall of the joint 3 by being deformed into a state indicated by a two-dot chain line in FIG.
And the sealing chamber R-2 is formed by the inner wall of the joint 3 and the outer surface of the lip 6 and the protrusion 61. As a result, even if the cap 4 is pulled out, the lip 6 does not return to the state before the solid line by its elastic force. The sealed chamber R-2 may still be maintained in a sealed state.
Therefore, if the tube outlet to be connected to the inner surface of the lip portion 6 is inserted in this state, the pressure contact force between the inner surface of the lip portion 6 and the outer surface of the tube outlet to be connected is weakened, and the gasket leakage preventing effect It was causing the performance of the.
[0005]
[Means for solving the problems]
The present invention is intended to provide an annular packing that solves the above-mentioned problems. The gist of the present invention is as follows: (1) An annular packing body, and a lip that is folded back from one end of the inner periphery of the packing body and is inclined in the axial center direction. An annular packing comprising a plurality of annular projections, wherein an annular protrusion divided in the circumferential direction is provided on the outer peripheral surface of the tip of the lip portion.
(2) An annular packing comprising an annular packing body and a lip portion that is folded back from one end of the inner periphery of the packing body and is inclined in the axial center direction, and an annular protrusion is provided on the outer peripheral surface of the tip of the lip portion; An annular packing characterized in that the annular projection is provided with irregularities.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of the annular packing of the present invention, FIG. 2 is a view taken in the direction of arrows II-II of FIG. 1, and FIG.
[0007]
In FIG. 1, reference numeral 1 denotes an annular packing body made of rubber, and the packing body 1 is mounted in a packing mounting groove 31 of a T-shaped joint 3.
Reference numeral 2 denotes a lip portion which is folded back from one end of the inner periphery of the packing body 1 and is inclined in the axial center direction. The ring packing of the present invention is constituted by both the packing body 1 and the lip portion 2.
And the annular protrusion 21 divided | segmented into the circumferential direction is provided in the front-end | tip outer peripheral surface of the lip | rip part 2. As shown in FIG.
As shown in FIG. 2, the annular protrusion 21 is divided in the circumferential direction by one to a plurality of slits 22 and is provided on the outer peripheral surface of the lip portion 2.
The annular protrusion 21 is provided to increase the pressure contact force between the lip portion 2 and the connection pipe inserted into the lip portion 2 in the connection step.
[0008]
Next, a procedure for using the annular packing of the present invention mounted on a T-shaped joint will be described in detail with reference to FIG.
After the annular packing body 1 is fitted into the packing mounting groove 31 of the T-shaped joint 3, when the closing cap 4 is inserted into the annular packing, the lip portion 2 is deformed into a two-dot chain line state to form an annular protrusion. 21 is pressed against the inner wall of the joint 3, and a reaction force is generated by this pressing force to push the lip portion 2 back inward.
As a result, the pressure contact force between the inner surface of the lip portion 2 and the outer surface of the cap 4 increases, and the effect of preventing leakage of fluid and the like from this contact surface is improved.
[0009]
Moreover, although the compartment R-1 is formed by the inner wall of the joint 3 and the outer surface of the lip 2 and the protrusion 21, the compartment R-1 is in a sealed state because it communicates with the inside of the joint 3 through the slit 22. It will not be.
Therefore, since the compartment R-1 is not maintained in a sealed state, when the cap 4 is pulled out, air flows into the compartment R-1 through the slit 22 even if the lip portion 2 is gradually reduced in diameter by its elastic force. The compartment is not evacuated and the lip 2 is completely returned to the previous solid line.
Even if the insertion tube is inserted into the receiving port again, the pressure contact force between the inner surface of the lip portion 2 and the outer surface of the insertion tube is not weakened, so that the packing performance does not deteriorate.
[0010]
In the above embodiment, in order to prevent the compartment R-1 from being sealed, the outer peripheral surface of the tip of the lip portion 2 is provided with the annular projection 21 divided in the circumferential direction. The same effect can be obtained even if the annular protrusion 21 is provided with unevenness in the circumferential direction on the surface where the annular protrusion 21 is in pressure contact with the inner wall of the joint 3 instead of dividing the annular protrusion 21 in the circumferential direction.
[0011]
FIG. 3 shows an embodiment in which the annular packing of the present invention is fitted in the packing mounting groove 31 of the T-shaped joint 3 and the closing cap 4 is inserted into the annular packing.
[0012]
【The invention's effect】
The annular packing of the present invention is most suitable as a packing for an expansion and contraction and an angleable pipe joint, and the inner and outer peripheral surfaces of the annular packing of the present invention interposed at the joint portion between the receiving portion and the outlet portion are lip An annular protrusion divided in the circumferential direction on the tip outer peripheral surface of the section or an annular protrusion on the tip outer peripheral surface of the lip section and providing unevenness on the annular protrusion, so that a high pressure contact force can always be obtained, so that the expansion and contraction and joining angles of the tubes It has an excellent effect such that the fluid in the pipe does not leak at the time of change.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an annular packing according to the present invention.
FIG. 2 is a view taken in the direction of arrows II-II in FIG.
FIG. 3 is a view showing a usage state of the annular packing of the present invention.
FIG. 4 is a sectional view of a conventional annular packing.
1 Annular packing body 2 Lip part 21 Annular protrusion 22 Slit

Claims

An annular packing composed of an annular packing body and a lip portion that is folded back from one end portion of the inner periphery of the packing body and is inclined in the axial center direction. An annular packing provided with a protrusion.

An annular packing comprising an annular packing body and a lip portion that is folded back from one end portion of the inner periphery of the packing body and is inclined in the axial center direction. An annular protrusion is provided on the outer peripheral surface of the tip of the lip portion. An annular packing characterized by having unevenness on the surface.