JPH0139968Y2

JPH0139968Y2 -

Info

Publication number: JPH0139968Y2
Application number: JP1985092084U
Authority: JP
Priority date: 1985-06-18
Filing date: 1985-06-18
Publication date: 1989-11-30
Also published as: JPS62859U

Description

【考案の詳細な説明】（産業上の利用分野）本考案は、例えばピストンとシリンダ或はピス
トンロツドとシリンダカバの如く、互いに同芯に
組合わされて軸方向の相対運動をなす２部材間の
密封手段として使用されるパツキンに関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention is intended for sealing between two members, such as a piston and a cylinder, or a piston rod and a cylinder cover, which are assembled concentrically and move relative to each other in the axial direction. Concerning Patsukin used as a means.

（従来の技術）互いに同芯に組合わされて軸方向の相対運動を
なす２部材間の密封手段としては、一例を第２図
に示すように、軸方向に開口する環状溝２を備え
て略Ｕ字状の断面形状を呈する摺動部材１と、軸
方向に穿たれた通気孔５を配設されて環状溝２内
に挿入された補助リング４とよりなるパツキン
を、相対運動２部材の一方６に形成されたパツキ
ン装着溝９内に配置して相対運動２部材の他方７
の周面と密封摺動させるようになした密封手段が
広く使用されている。(Prior Art) As shown in FIG. 2, an example of a sealing means between two members that are assembled concentrically with each other and make relative movement in the axial direction is a sealing means that is provided with an annular groove 2 that opens in the axial direction. A packing consisting of a sliding member 1 having a U-shaped cross-section and an auxiliary ring 4 inserted into an annular groove 2 with a ventilation hole 5 bored in the axial direction, The other member 7 of the two members is arranged in the gasket mounting groove 9 formed in the one member 6 for relative movement.
Sealing means designed to sealably slide against the circumferential surface of are widely used.

摺動部材１の環状溝２内に挿入された補助リン
グ４は、摺動部材１の相対運動２部材６，７に対
する接触圧力をバツクアツプするもので、補助リ
ング４に配設された通気孔５は、摺動部材１と環
状溝２の底面との間に生起された背圧を逃がすた
めのものである。 The auxiliary ring 4 inserted into the annular groove 2 of the sliding member 1 backs up the contact pressure of the sliding member 1 against the relative movement 2 members 6 and 7. is for releasing back pressure generated between the sliding member 1 and the bottom surface of the annular groove 2.

（考案が解決しようとする問題点）上記した従来例のパツキンにおいては、補助リ
ング４が断面略円形状に形成されていることによ
り、相対運動２部材間の偏心、ステイツクスリツ
プ等により局部的なよじれを生じやすく、よじれ
の発生に伴つて通気孔５が塞がれるために、補助
リング４が環状溝２から脱出することができる。(Problems to be Solved by the Invention) In the conventional packing described above, since the auxiliary ring 4 is formed to have a substantially circular cross section, local movement may occur due to eccentricity between the two members, stick slip, etc. The auxiliary ring 4 can easily escape from the annular groove 2 because the vent hole 5 is blocked as the twist occurs.

本考案は、上記した従来例のパツキンにおける
問題点を解消することを目的とするものである。 The present invention aims to solve the problems in the conventional packing described above.

（問題点を解決するための手段）本考案は、上記した従来技術のパツキンにおけ
る問題点に鑑み、摺動部材の環状溝内に挿入され
る補助リングを、２個の略円形により形成される
略だるま型の断面形状を呈するように成形し、軸
方向の幅寸法を環状溝の深さと略同等に設定する
ものである。(Means for Solving the Problems) In view of the problems with the conventional gaskets described above, the present invention provides an auxiliary ring to be inserted into the annular groove of the sliding member, which is formed of two approximately circular shapes. It is formed to have a substantially potbell-shaped cross-sectional shape, and the width in the axial direction is set to be substantially equal to the depth of the annular groove.

（実施例）第１図の実施例においては、摺動部材１の環状
溝２内に挿入される補助リング４が、２個の略円
形が合体されて形成した略だるま型の断面形状を
呈し、かつ環状溝２の深さと略同等の軸方向幅寸
法を備えている。(Embodiment) In the embodiment shown in FIG. 1, the auxiliary ring 4 inserted into the annular groove 2 of the sliding member 1 has a substantially pot-shaped cross-sectional shape formed by combining two substantially circular parts. , and has an axial width dimension substantially equal to the depth of the annular groove 2.

（考案の効果）本考案のパツキンが、上記したように、摺動部
材の環状溝内に挿入されて摺動部材の弾発力をバ
ツクアツプする補助リングの断面形状を２個の略
円形の合体により形成される略だるま型に成形さ
れ、該補助リングの軸方向幅寸法を、環状溝の深
さと略同等に設定されていることにより、環状溝
内における補助リングの姿勢が、相対運動２部材
間の偏心或は摺動部材のステイツクスリツプが生
起された際においても正常に保たれ、従来のパツ
キンにおいて見られた補助リングの環状溝からの
脱出が完全に防止される。(Effects of the invention) As described above, the packing of the present invention combines the cross-sectional shape of the auxiliary ring, which is inserted into the annular groove of the sliding member and backs up the elastic force of the sliding member, into two approximately circular shapes. The width of the auxiliary ring in the axial direction is set to be approximately equal to the depth of the annular groove, so that the posture of the auxiliary ring within the annular groove is controlled by the relative movement of the two members. Even in the event of eccentricity between the seals or stick slip of the sliding member, it is maintained normally, and the auxiliary ring is completely prevented from slipping out of the annular groove, which is the case with conventional packings.

[Brief explanation of the drawing]

第１図は、本考案の一実施例の断面図、第２図
は、従来技術によるパツキンの断面図である。１……摺動部材、２……環状溝、４……補助リ
ング、５……通気孔、６，７……相対運動部材、
９……パツキン挿入溝。 FIG. 1 is a sectional view of one embodiment of the present invention, and FIG. 2 is a sectional view of a packing according to the prior art. 1...Sliding member, 2...Annular groove, 4...Auxiliary ring, 5...Vent hole, 6, 7...Relative movement member,
9...Packskin insertion groove.

Claims

[Scope of utility model registration request]

A sliding member 1 having an annular groove 2 opening in the axial direction and having a substantially U-shaped cross-sectional shape, and an auxiliary member having a ventilation hole 5 bored in the axial direction and inserted into the annular groove 2. The ring 4 is disposed in a gasket mounting groove 9 formed in one of the two members 6, 7 that are assembled concentrically with each other to make relative movement in the axial direction, so that the other of the two members 6, 7 moves relative to each other. In the packing that slides on the circumferential surface of the auxiliary ring 4,
1. A packing having a substantially pot-shaped cross-sectional shape formed by combining two substantially circular shapes, and having an axial width dimension substantially equal to the depth of the annular groove 2.