JPH0446120Y2

JPH0446120Y2 -

Info

Publication number: JPH0446120Y2
Application number: JP1985186502U
Authority: JP
Priority date: 1985-12-03
Filing date: 1985-12-03
Publication date: 1992-10-29
Also published as: JPS6293462U

Description

【考案の詳細な説明】（産業上の利用分野）本考案は、互いに同芯に組合わされて相対運動
をなす２部材間の隙間を遮断する密封装置に関す
る。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a sealing device that blocks a gap between two members that are concentrically assembled and move relative to each other.

（従来の技術）例えば、ピストンとシリンダ、ピストンロツド
とシリンダカバのように、互いに同芯に組合わさ
れて相対運動をなす２部材間には、圧力流体或は
潤滑油が両部材間の隙間を通つて反対側へ漏れな
いようにするために、一例を第２図に示すよう
に、弾性材料をもつて製せられたパツキンを有す
る密封装置が使用されている。(Prior art) For example, between two members that are concentrically assembled and move relative to each other, such as a piston and a cylinder, or a piston rod and a cylinder cover, pressurized fluid or lubricating oil flows through the gap between the two members. In order to prevent leakage to the opposite side, a sealing device having a gasket made of an elastic material is used, an example of which is shown in FIG.

同図の密封装置においては、相対運動２部材の
内方の部材１に設けられた環状溝３内に、耐摩耗
性及び低摩擦性を備える合成樹脂材料をもつて製
せられ、外方の相対運動部材２の内周面と弾性接
触する摺動リング６と、摺動リング６の材料より
も高い強度を示す材料をもつて製せられ、摺動リ
ング６の側面を支えるバツクアツプリング７と、
ゴム様弾性材料をもつて製せられ、摺動リング６
の内方に配置されて摺動リング６を外方の相対運
動部材２の内周面へ押圧するバツクリング８より
なるパツキン５が挿入されている。 In the sealing device shown in the figure, a sliding ring 6 made of a synthetic resin material with wear resistance and low friction and elastically contacting the inner peripheral surface of the outer relative moving member 2 is provided in an annular groove 3 provided in the inner member 1 of the relative moving member 2, a backup ring 7 made of a material showing a higher strength than the material of the sliding ring 6 and supporting the side surface of the sliding ring 6,
The sliding ring 6 is made of a rubber-like elastic material.
A packing 5 consisting of a backing ring 8 is inserted into the inner space of the bearing 1 and presses the sliding ring 6 against the inner peripheral surface of the outer relative moving member 2.

（考案が解決しようとする問題点）上記した従来技術による密封装置においては、
パツキン５を構成するバツクリング８と環状溝３
の接触面が円筒面に形成されているために、パツ
キン５に対し軸方向両側から交互に圧力が付加さ
れる場合或は２部材１，２間の相対運動が軸方向
の往復運動である場合には、バツクリング８と環
状溝３の間に相対的な滑りが生じ、該相対滑りの
繰返しによりバツクリング８が摩耗して密封機能
の低下をもたらすおそれがある。(Problems to be solved by the invention) In the above-mentioned conventional sealing device,
Back ring 8 and annular groove 3 forming packing 5
When the contact surface is formed into a cylindrical surface, pressure is applied alternately to the packing 5 from both sides in the axial direction, or when the relative motion between the two members 1 and 2 is a reciprocating motion in the axial direction. In this case, a relative slip occurs between the back ring 8 and the annular groove 3, and as a result of repeated relative slip, the back ring 8 may be worn out and the sealing function may deteriorate.

本考案は、上記した問題点を解消して長期間に
わたり正常な密封機能を持続する密封装置の構造
を提示することを目的とするものである。 The present invention aims to solve the above-mentioned problems and to provide a structure of a sealing device that maintains a normal sealing function for a long period of time.

（問題点を解決するための手段）本考案は、上記した従来の技術による密封装置
における問題点に鑑み、環状溝及びパツキンの接
合部に、互いに向い合つた円錐面よりなり、略山
型の断面形状を呈して互いに係合する環状突起及
び環状凹所を形成された構成となすものである。(Means for Solving the Problems) In view of the problems in the sealing devices according to the conventional technology described above, the present invention has been proposed to provide a substantially mountain-shaped structure in which the joint portion of the annular groove and the packing is provided with conical surfaces facing each other. It has a configuration in which an annular projection and an annular recess that have a cross-sectional shape and engage with each other are formed.

（作用）上記した構成を備えた本考案の密封装置におい
ては、環状溝及びパツキンの接合部に形成された
環状突起及び環状凹所が、軸方向のずれに伴う円
錐面の楔作用によつてパツキンの圧接力を強化さ
せる。(Function) In the sealing device of the present invention having the above-described configuration, the annular projection and the annular recess formed at the joint between the annular groove and the packing are caused by the wedge action of the conical surface due to the axial deviation. Strengthens the pressure contact force of the packing.

（実施例）第１図の実施例においては、内方の相対運動部
材１に設けられた環状溝３の底周面に、略山型の
環状突起１０が形成され、摺動リング６及びバツ
クアツプリング７とともにパツキン５を構成する
バツクリング８の内周面に、環状突起１０と係合
する環状凹所１１が形成されている。(Embodiment) In the embodiment shown in FIG. 1, a substantially mountain-shaped annular protrusion 10 is formed on the bottom peripheral surface of the annular groove 3 provided in the inner relative movement member 1, and the sliding ring 6 and back An annular recess 11 that engages with an annular projection 10 is formed on the inner circumferential surface of the back ring 8, which together with the apple ring 7 constitutes the packing 5.

環状突起１０を形成する両傾斜面の傾斜角度、
頂縁の軸方向の位置等は、パツキンに対し反対向
に作用する押力を対比させて適宜に設定される。 the angle of inclination of both inclined surfaces forming the annular protrusion 10;
The axial position of the top edge, etc. are appropriately set by comparing the pressing forces acting in opposite directions on the packing.

図示の実施例においては、パツキン５を装着す
るための環状溝３が内方の相対運動部材１側に設
けられているが、外方の相対運動部材２側に設け
た態様となすことも可能であり、又、環状突起１
０及び環状凹所１１が１条の組合せとして示され
ているが、複数条の組合せとすることもできる。 In the illustrated embodiment, the annular groove 3 for attaching the gasket 5 is provided on the inner relative movement member 1 side, but it may also be provided on the outer relative movement member 2 side. , and the annular projection 1
0 and the annular recess 11 are shown as a combination of one thread, but a combination of multiple threads is also possible.

（考案の効果）本考案の密封装置が、上記したように、環状溝
及びパツキンの接合部に、互いに向い合つた円錐
面よりなり、略山型の断面形状を呈して互いに係
合する環状突起及び環状凹所を形成されているこ
とにより、環状溝及びパツキンの接合部に形成さ
れた環状突起及び環状凹所が、軸方向のずれに伴
う円錐面の楔作用によつてパツキンの圧接力を強
化させるとともに、環状溝内におけるパツキンの
移動を抑止する。(Effects of the Invention) As described above, the sealing device of the present invention has an annular projection formed at the joint between the annular groove and the packing, which is composed of mutually facing conical surfaces, has a substantially chevron-shaped cross-sectional shape, and engages with each other. and an annular recess are formed, so that the annular protrusion and annular recess formed at the joint between the annular groove and the packing reduce the pressure contact force of the packing due to the wedge action of the conical surface due to the axial deviation. This strengthens the seal and prevents the packing from moving within the annular groove.

【図面の簡単な説明】[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、従来技術による密封装置の一例の断面図であ
る。１……内方の相対運動部材、２……外方の相対
運動部材、３……環状溝、５……パツキン、６…
…摺動リング、７……バツクアツプリング、８…
…バツクリング、１０……環状突起、１１……環
状凹所。 FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of an example of a sealing device according to the prior art. DESCRIPTION OF SYMBOLS 1... Inner relative movement member, 2... Outer relative movement member, 3... Annular groove, 5... Packing, 6...
...Sliding ring, 7...Backup spring, 8...
... back ring, 10... annular projection, 11... annular recess.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

互いに同芯に組合わされて相対運動をなす２部
材１，２の一方に設けられた環状溝３内に、前記
相対運動２部材１，２の他方の周面と摺動するパ
ツキン５を挿入されてなる密封装置において、前
記環状溝３及びパツキン５の接触部に、互いに向
い合つた円錐面よりなり、略山型の断面形状を呈
して互いに係合する環状突起１０及び環状凹所１
１を形成されていることを特徴とする密封装置。 Into an annular groove 3 provided in one of the two members 1 and 2 that are combined concentrically with each other to make a relative motion, a packing 5 that slides on the circumferential surface of the other of the two members 1 and 2 that move relative to each other is inserted. In this sealing device, an annular protrusion 10 and an annular recess 1 are provided at the contact portion between the annular groove 3 and the packing 5, and the annular protrusion 10 and the annular recess 1 are formed of conical surfaces facing each other, have a substantially chevron-shaped cross-section, and engage with each other.
1. A sealing device comprising: 1.