JP2021173295A

JP2021173295A - Seal member

Info

Publication number: JP2021173295A
Application number: JP2020075461A
Authority: JP
Inventors: 圭森谷; Kei Moriya; 基寛額田; Motohiro Nukada
Original assignee: Uchiyama Manufacturing Corp
Current assignee: Uchiyama Manufacturing Corp
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2021-11-01
Anticipated expiration: 2040-04-21
Also published as: JP7411221B2

Abstract

To provide a seal member which can inhibit a seal member from being assembled to a space between two members in an inclined state to achieve a seal function in a reliable manner.SOLUTION: A body part 11 is disposed in a groove part 21, compressed by two members, and seals a space between the two members. Falling prevention projections 12 are provided on one side surface side of the body part 11 in a state that a dimension in a height direction is smaller than the body part 11. Further, a tip of the falling prevention projection 12 contacts with a wall surface of the facing groove part 21 when the falling prevention projection 12 is disposed in the groove part 21. A pressing part 13 is provided protruding from one portion of the falling prevention projection 12 in the height direction and is pressed when the falling prevention projection 12 is disposed in the groove part 21.SELECTED DRAWING: Figure 2

Description

本発明は、二部材のうちの一方の部材の被シール面に設けられた溝部に装着され、当該二部材間をシールする環状のシール部材に関する。 The present invention relates to an annular sealing member that is mounted in a groove provided on the surface to be sealed of one of the two members and seals between the two members.

従来、シール部材としてＯリング等が広く使用されている。このようなシール部材を介在させて二部材を組み付ける際に、溝部を備える部材を移動させる必要がある場合、単なるＯリング等を使用すると、部材を傾けたときに溝部に装着したＯリングが脱落してしまう。このような課題を解決するため、溝部内に装着されたときに、対向する側面に先端が当接することで溝部内にシール部材を一時的に固定させる脱落防止用突起を備えたシール部材が提案されている（例えば、特許文献１−４）。シール部材において、このような脱落防止用突起は、溝部内に収容可能な状態にまで弾性変形により形状を変形された後、溝部内に配置される。溝部内に配置された脱落防止用突起は弾性変形により復元し、シール部材が溝部の側面間に挟まる状態となる。その結果、溝部からのシール部材の脱落を防止することができる。 Conventionally, an O-ring or the like is widely used as a sealing member. When it is necessary to move the member provided with the groove when assembling the two members with such a seal member interposed therebetween, if a simple O-ring or the like is used, the O-ring attached to the groove will fall off when the member is tilted. Resulting in. In order to solve such a problem, a seal member having a protrusion for preventing falling off, which temporarily fixes the seal member in the groove by contacting the tip with the opposite side surface when mounted in the groove, has been proposed. (For example, Patent Documents 1-4). In the seal member, such a drop-out prevention protrusion is arranged in the groove after being deformed by elastic deformation to a state where it can be accommodated in the groove. The drop-out prevention protrusions arranged in the groove are restored by elastic deformation, and the seal member is sandwiched between the side surfaces of the groove. As a result, it is possible to prevent the seal member from falling off from the groove.

特開平２−１５０５７５号公報Japanese Unexamined Patent Publication No. 2-150575 実開平３−７２１５６号公報Jikkenhei 3-72156 Gazette 特開２００３−１４８６２２号公報Japanese Unexamined Patent Publication No. 2003-148622 特開２００９−２１００４９号公報Japanese Unexamined Patent Publication No. 2009-210049

しかしながら、脱落防止用突起を備えるシール部材は、上述のようにシール部材が溝部の側面間に挟まる状態となって脱落を防止する構成であるため、脱落をより確実に防止しようとすると、脱落防止用突起が溝部の側面を押す力をより高める必要がある。その結果、溝部に挿入し難く、シール部材が溝部に傾いた状態で二部材間に組み付けられてしまう場合がある。 However, since the seal member provided with the protrusion for preventing falling off is configured to prevent the sealing member from falling off by being sandwiched between the side surfaces of the groove portion as described above, it is possible to prevent the sealing member from falling off more reliably. It is necessary to increase the force with which the protrusion pushes the side surface of the groove. As a result, it is difficult to insert the seal member into the groove portion, and the seal member may be assembled between the two members in a state of being tilted toward the groove portion.

本発明は、上記実情に鑑みなされたもので、シール部材が傾いた状態のまま二部材間に組付けられてしまうことを抑制して、シール機能を確実に発揮させることができるシール部材を提供することを目的としている。 The present invention has been made in view of the above circumstances, and provides a sealing member capable of reliably exerting a sealing function by suppressing the sealing member from being assembled between two members in an inclined state. The purpose is to do.

上述の目的を達成するために、本発明は以下の技術的手段を採用している。まず、本発明は、二部材のうちの一方の部材の被シール面に設けられた溝部に装着され、二部材間をシールする環状のシール部材を前提としている。そして、本発明に係るシール部材は、本体部、脱落防止用突起、及び押圧部を備える。本体部は、溝部内に配置されるとともに、二部材によって圧縮されて二部材間をシールする。脱落防止用突起は、本体部の一側面側に、本体部よりも高さ方向の寸法が小さい状態で複数設けられるとともに、溝部内に配置された際に、対向する溝部の壁面に先端が当接する。押圧部は、脱落防止用突起の一部分から高さ方向に突出する状態で設けられ、溝部内に脱落防止用突起を配置する際に押圧される。 In order to achieve the above object, the present invention employs the following technical means. First, the present invention is premised on an annular sealing member that is mounted in a groove provided on the surface to be sealed of one of the two members and seals between the two members. The seal member according to the present invention includes a main body portion, a protrusion for preventing falling off, and a pressing portion. The main body is arranged in the groove and is compressed by the two members to seal between the two members. A plurality of drop-out prevention protrusions are provided on one side surface side of the main body portion in a state where the dimension in the height direction is smaller than that of the main body portion, and when arranged in the groove portion, the tip of the protrusion hits the wall surface of the opposite groove portion. Get in touch. The pressing portion is provided so as to project in the height direction from a part of the fall-out prevention protrusion, and is pressed when the fall-out prevention protrusion is arranged in the groove portion.

このシール部材では、シール部材を溝部に装着する際に、押圧部を押すという簡便な作業で、溝部内に脱落防止用突起を適切に配置することができる。その結果、シール部材が溝部内で傾いて配置された状態のまま二部材間に組付けられることを防止でき、確実にシール機能を発揮させることができる。 With this seal member, when the seal member is mounted on the groove portion, the protrusion for preventing falling off can be appropriately arranged in the groove portion by a simple operation of pushing the pressing portion. As a result, it is possible to prevent the sealing member from being assembled between the two members in a state of being tilted and arranged in the groove portion, and it is possible to reliably exert the sealing function.

以上のシール部材において、押圧部と本体部との間に間隔を有する構成を採用することもできる。この構成では、溝部内の空間に占めるシール部材の割合（溝部に対するシール部材の充填率）をより低減することができ、溝部内でシール部材がボリューム過多になることを回避して容易に設計を行うことができる。 In the above sealing member, it is also possible to adopt a configuration in which a space is provided between the pressing portion and the main body portion. In this configuration, the ratio of the sealing member to the space in the groove (the filling rate of the sealing member with respect to the groove) can be further reduced, and the design can be easily performed by avoiding the excessive volume of the sealing member in the groove. It can be carried out.

以上のシール部材において、押圧部が脱落防止用突起の中央部に設けられる構成を採用することもできる。この構成では、溝部内の空間に占めるシール部材の割合をより低減することができるとともに、押圧部に付与された外力により、脱落防止用突起をよりスムーズに溝部内に配置することができる。 In the above sealing member, it is also possible to adopt a configuration in which the pressing portion is provided in the central portion of the protrusion for preventing falling off. In this configuration, the ratio of the sealing member to the space in the groove can be further reduced, and the dropout prevention protrusion can be more smoothly arranged in the groove by the external force applied to the pressing portion.

以上のシール部材において、押圧部の形状が円錐台状である構成を採用することもできる。この構成では、溝部内の空間に占めるシール部材の割合をより低減することができるとともに、押圧部に付与された外力により、脱落防止用突起をよりスムーズに溝部内に配置することができる。 In the above sealing member, it is also possible to adopt a configuration in which the shape of the pressing portion is a truncated cone shape. In this configuration, the ratio of the sealing member to the space in the groove can be further reduced, and the dropout prevention protrusion can be more smoothly arranged in the groove by the external force applied to the pressing portion.

以上のシール部材において、押圧部が脱落防止用突起の高さ方向の両面に設けられる構成を採用することもできる。この構成では、溝部内へシール部材を挿入する向きに関わらず、上述の効果を奏することができる。 In the above sealing member, it is also possible to adopt a configuration in which the pressing portions are provided on both sides in the height direction of the protrusion for preventing falling off. In this configuration, the above-mentioned effect can be obtained regardless of the direction in which the seal member is inserted into the groove.

以上のシール部材において、脱落防止用突起が本体部の高さ方向の中央部に設けられる構成を採用することもできる。この構成では、溝部内への装着性と、脱落防止用突起による脱落防止機能とをバランスよく実現することができる。 In the above sealing member, it is also possible to adopt a configuration in which a protrusion for preventing falling off is provided in the central portion in the height direction of the main body portion. With this configuration, it is possible to achieve a good balance between the mountability in the groove and the drop-out prevention function by the drop-out prevention protrusion.

以上のシール部材において、押圧部の高さ方向の上端の位置と、本体部の高さ方向の上端の位置とは同じ位置である構成を採用することもできる。この構成では、押圧部に外力を容易に付与することができる。 In the above sealing member, it is also possible to adopt a configuration in which the position of the upper end of the pressing portion in the height direction and the position of the upper end of the main body portion in the height direction are the same. In this configuration, an external force can be easily applied to the pressing portion.

本発明によれば、シール部材が傾いた状態のまま二部材間に組付けられてしまうことを抑制して、シール機能を確実に発揮させることができるシール部材を提供することができる。 According to the present invention, it is possible to provide a seal member capable of reliably exerting a sealing function by suppressing the sealing member from being assembled between the two members in an inclined state.

本発明の一実施形態に係るシール部材の一例を模式的に示す平面図である。It is a top view which shows typically an example of the seal member which concerns on one Embodiment of this invention. （ａ）は同シール部材の脱落防止用突起部分を模式的に示す拡大平面図である。（ｂ）は（ａ）に示すシール部材の内周面を示す図である。（ｃ）は（ｂ）に示すシール部材の中央縦断面図である。(A) is an enlarged plan view schematically showing a protrusion portion for preventing the seal member from falling off. (B) is a figure which shows the inner peripheral surface of the seal member shown in (a). (C) is a central vertical sectional view of the seal member shown in (b). （ａ）は同シール部材を溝部に装着する途中の状態を模式的に示す断面図である。（ｂ）は同シール部材を溝部に装着した状態を模式的に示す断面図である。(A) is a cross-sectional view schematically showing a state in which the seal member is being mounted in the groove portion. (B) is a cross-sectional view schematically showing a state in which the seal member is mounted in the groove portion. （ａ）は同シール部材を二部材間に組み付ける途中の状態を模式的に示す断面図である。（ｂ）は同シール部材を二部材間に組み付けた状態を模式的に示す断面図である。(A) is a cross-sectional view schematically showing a state in which the seal member is being assembled between the two members. (B) is a cross-sectional view schematically showing a state in which the seal member is assembled between two members. （ａ）は比較例に係るシール部材を溝部に装着する途中の状態を模式的に示す断面図である。（ｂ）は同シール部材を溝部に装着した状態の一例を模式的に示す断面図である。(A) is a cross-sectional view schematically showing a state in which the seal member according to the comparative example is being mounted in the groove portion. (B) is a cross-sectional view schematically showing an example of a state in which the seal member is mounted in the groove portion. （ａ）は本発明の一実施形態に係るシール部材の他の例における脱落防止用突起部分を模式的に示す拡大平面図である。（ｂ）は（ａ）に示すシール部材の内側面を示す図である。（ｃ）は（ｂ）に示すシール部材の中央縦断面図である。(A) is an enlarged plan view schematically showing a protrusion for preventing falling off in another example of the seal member according to the embodiment of the present invention. (B) is a figure which shows the inner side surface of the seal member shown in (a). (C) is a central vertical sectional view of the seal member shown in (b). （ａ）は本発明の一実施形態に係るシール部材の他の例における脱落防止用突起部分を模式的に示す拡大平面図である。（ｂ）は（ａ）に示すシール部材の内側面を示す図である。（ｃ）は（ｂ）に示すシール部材の中央縦断面図である。(A) is an enlarged plan view schematically showing a protrusion for preventing falling off in another example of the seal member according to the embodiment of the present invention. (B) is a figure which shows the inner side surface of the seal member shown in (a). (C) is a central vertical sectional view of the seal member shown in (b). （ａ）は本発明の一実施形態に係るシール部材の他の例における脱落防止用突起部分を模式的に示す拡大平面図である。（ｂ）は（ａ）に示すシール部材の内側面を示す図である。（ｃ）は（ｂ）に示すシール部材の中央縦断面図である。(A) is an enlarged plan view schematically showing a protrusion for preventing falling off in another example of the seal member according to the embodiment of the present invention. (B) is a figure which shows the inner side surface of the seal member shown in (a). (C) is a central vertical sectional view of the seal member shown in (b). （ａ）は本発明の一実施形態に係るシール部材の他の例における脱落防止用突起部分を模式的に示す拡大平面図である。（ｂ）は（ａ）に示すシール部材の内側面を示す図である。（ｃ）は（ｂ）に示すシール部材の中央縦断面図である。(A) is an enlarged plan view schematically showing a protrusion for preventing falling off in another example of the seal member according to the embodiment of the present invention. (B) is a figure which shows the inner side surface of the seal member shown in (a). (C) is a central vertical sectional view of the seal member shown in (b). （ａ）は本発明の一実施形態に係るシール部材の他の例における脱落防止用突起部分を模式的に示す拡大平面図である。（ｂ）は（ａ）に示すシール部材の内側面を示す図である。(A) is an enlarged plan view schematically showing a protrusion for preventing falling off in another example of the seal member according to the embodiment of the present invention. (B) is a figure which shows the inner side surface of the seal member shown in (a). （ａ）は図１０（ｂ）に示すシール部材の中央縦断面図である。（ｂ）は同シール部材を溝部に装着した状態を模式的に示す断面図である。(A) is a central vertical sectional view of the seal member shown in FIG. 10 (b). (B) is a cross-sectional view schematically showing a state in which the seal member is mounted in the groove portion. （ａ）は本発明の一実施形態に係るシール部材の他の例における脱落防止用突起部分を模式的に示す拡大平面図である。（ｂ）は（ａ）に示すシール部材の内側面を示す図である。（ｃ）は（ｂ）に示すシール部材の中央縦断面図である。(A) is an enlarged plan view schematically showing a protrusion for preventing falling off in another example of the seal member according to the embodiment of the present invention. (B) is a figure which shows the inner side surface of the seal member shown in (a). (C) is a central vertical sectional view of the seal member shown in (b).

以下、本発明の実施形態について、図面を参照しながらより詳細に説明する。本発明に係るシール部材は、例えば、インテークマニホールドとシリンダヘッドとの間等の二部材間を密封するシール構造に使用される。本発明に係るシール部材は、当該二部材の一方の部材の被シール面に設けられた環状かつ凹状の溝部に装着される。特に限定されないが、ここでは、平面視において円形状の溝部に装着されるシール部材により本発明を具体化している。 Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. The seal member according to the present invention is used in a seal structure that seals between two members, such as between an intake manifold and a cylinder head. The sealing member according to the present invention is mounted in an annular and concave groove provided on the surface to be sealed of one of the two members. Although not particularly limited, here, the present invention is embodied by a seal member mounted on a circular groove in a plan view.

図１は、本発明の一実施形態に係るシール部材の一例を模式的に示す平面図である。図１に示すように、本実施形態のシール部材１０は、環状の本体部１１と、本体部１１の内周側に適当な間隔をおいて設けられた脱落防止用突起１２とを備える。シール部材１０の全体形状は、装着される溝部に対応する環状に形成される。上述のとおり、シール部材１０は平面視において円形状の溝部に装着されるため、本体部１１の全体形状は円形状になっている。 FIG. 1 is a plan view schematically showing an example of a seal member according to an embodiment of the present invention. As shown in FIG. 1, the seal member 10 of the present embodiment includes an annular main body portion 11 and a dropout prevention protrusion 12 provided on the inner peripheral side of the main body portion 11 at an appropriate distance. The overall shape of the seal member 10 is formed in an annular shape corresponding to the groove to be mounted. As described above, since the seal member 10 is mounted in the circular groove portion in a plan view, the overall shape of the main body portion 11 is circular.

図２（ａ）は、シール部材１０の脱落防止用突起１２部分を模式的に示す拡大平面図である。図２（ｂ）は、図２（ａ）に示すシール部材１０の内周面を示す図である。図２（ｃ）は、図２（ｂ）に示すシール部材１０の中央縦断面図である。シール部材１０は、ＦＫＭ、ＮＢＲ、Ｈ−ＮＢＲ、ＥＰＤＭ、ＣＲ、ＡＣＭ、ＡＥＭ、ＶＭＱ及びＦＶＭＱ等のゴム材による加硫成型体により構成される。上述のとおり、シール部材１０の全体形状は円形状である。本明細書では、当該円形状のシール部材１０の中心軸に沿う方向を高さ方向と呼称し、当該円形状の半径に沿う方向を径方向と呼称する。図２（ｃ）は、径方向に沿う断面図に対応する。図２（ｂ）及び図２（ｃ）では、図中の上下方向が高さ方向に対応する。また、図２（ａ）及び図２（ｃ）では、図中の左右方向が径方向に対応する。 FIG. 2A is an enlarged plan view schematically showing a portion of the sealing member 10 for preventing the protrusion 12 from falling off. FIG. 2B is a diagram showing an inner peripheral surface of the seal member 10 shown in FIG. 2A. FIG. 2 (c) is a central vertical sectional view of the seal member 10 shown in FIG. 2 (b). The seal member 10 is composed of a vulcanized molded body made of a rubber material such as FKM, NBR, H-NBR, EPDM, CR, ACM, AEM, VMQ and FVMQ. As described above, the overall shape of the seal member 10 is circular. In the present specification, the direction along the central axis of the circular sealing member 10 is referred to as the height direction, and the direction along the radius of the circular shape is referred to as the radial direction. FIG. 2C corresponds to a cross-sectional view along the radial direction. In FIGS. 2 (b) and 2 (c), the vertical direction in the figure corresponds to the height direction. Further, in FIGS. 2 (a) and 2 (c), the left-right direction in the figure corresponds to the radial direction.

図２（ａ）から図２（ｃ）に示すように、シール部材１０の本体部１１は円形状の断面形状を有している。本体部１１の高さ方向の厚みは、後述のように、被シール面の溝部の深さよりも大きく設定されている。したがって、溝部に配置されたシール部材１０は、当該溝部が形成された一方の部材と、溝部が形成されていない他方の部材とを組み付けた際、両部材の間で圧縮され、当該二部材間をシールする。 As shown in FIGS. 2 (a) to 2 (c), the main body 11 of the seal member 10 has a circular cross-sectional shape. The thickness of the main body 11 in the height direction is set to be larger than the depth of the groove on the surface to be sealed, as will be described later. Therefore, the seal member 10 arranged in the groove is compressed between the two members when the one member in which the groove is formed and the other member in which the groove is not formed are assembled. To seal.

脱落防止用突起１２は、本体部１１よりも高さ方向の寸法が小さい状態で複数（ここでは３つ）設けられる。本実施形態のシール部材１０では、脱落防止用突起１２は、高さ方向において、本体部１１の高さ方向の厚みの半分程度の厚みを有し、本体部１１の高さ方向の中央部から内周面側に突出している。図２（ａ）に示すように、脱落防止用突起１２は平面視において概ね半楕円状の形状を有している。また、脱落防止用突起１２と本体部１１との接続部分である脱落防止用突起１２の基部（本体部１１の近傍）の内周面は、強度を高める観点から、本体部１１に近づくほど徐々に本体部１１の内周面における円周方向の幅が次第に大きくなる凹曲面により構成されている。 A plurality of (three in this case) protrusions 12 for preventing falling off are provided in a state where the dimension in the height direction is smaller than that of the main body 11. In the seal member 10 of the present embodiment, the dropout prevention protrusion 12 has a thickness of about half the thickness of the main body 11 in the height direction in the height direction, and is from the central portion of the main body 11 in the height direction. It protrudes toward the inner peripheral surface. As shown in FIG. 2A, the dropout prevention protrusion 12 has a substantially semi-elliptical shape in a plan view. Further, from the viewpoint of increasing the strength, the inner peripheral surface of the base portion (near the main body portion 11) of the fall prevention protrusion 12 which is the connection portion between the fall prevention protrusion 12 and the main body portion 11 gradually approaches the main body portion 11. It is composed of a concave curved surface whose width in the circumferential direction on the inner peripheral surface of the main body 11 gradually increases.

また、シール部材１０は、径方向において、脱落防止用突起１２が設けられた部分の内周端から外周端までの寸法、すなわち、脱落防止用突起１２の内周側端部１２ａから本体部１１の外周側端部１１ａまでの寸法が、シール部材１０が装着される溝部の開口幅よりもわずかに大きく設定されている。したがって、シール部材１０を溝部内に適切に配置した場合、脱落防止用突起１２は、対向する溝部の壁面（後述の内周側壁面２１ｂ）に先端が当接することになる。 Further, the seal member 10 has a dimension from the inner peripheral end to the outer peripheral end of the portion provided with the fall prevention protrusion 12 in the radial direction, that is, from the inner peripheral side end portion 12a of the fall prevention protrusion 12 to the main body portion 11. The dimension up to the outer peripheral side end portion 11a is set to be slightly larger than the opening width of the groove portion on which the seal member 10 is mounted. Therefore, when the seal member 10 is appropriately arranged in the groove portion, the tip of the dropout prevention protrusion 12 comes into contact with the wall surface of the opposite groove portion (the inner peripheral side wall surface 21b described later).

脱落防止用突起１２は、溝部内に脱落防止用突起１２を配置する際に押圧される押圧部１３をそれぞれ備えている。押圧部１３は、脱落防止用突起１２の一部分から前記高さ方向に突出する状態で設けられる。シール部材１０では、円錐台形状の押圧部１３が、平面視における各脱落防止用突起１２の中央部、すなわち、図２（ｂ）において、脱落防止用突起１２の突出幅方向（長手方向）の中央部に設けられている。また、特に限定されないが、本実施形態では、図２（ａ）に示すように、円錐台状の押圧部１３の底部１３ａが、脱落防止用突起１２の本体部１１側の端部に接する状態で配置されている。さらに、図２（ｃ）に示すように、本実施形態では、押圧部１３は、脱落防止用突起１２の高さ方向の両面に設けられており、高さ方向において、押圧部１３の先端（図２（ｃ）における、押圧部１３の上端及び下端）の位置は、本体部１１の対応する先端（図２（ｃ）における、本体部１１の上端及び下端）の位置と同じ位置になっている。 The dropout prevention protrusion 12 includes a pressing portion 13 that is pressed when the dropout prevention protrusion 12 is arranged in the groove portion. The pressing portion 13 is provided so as to project in the height direction from a part of the dropout prevention protrusion 12. In the seal member 10, the truncated cone-shaped pressing portion 13 is located at the center of each of the fall prevention protrusions 12 in a plan view, that is, in FIG. 2B, in the protrusion width direction (longitudinal direction) of the fall prevention protrusions 12. It is provided in the center. Further, although not particularly limited, in the present embodiment, as shown in FIG. 2A, the bottom portion 13a of the truncated cone-shaped pressing portion 13 is in contact with the end portion of the dropout prevention protrusion 12 on the main body portion 11 side. It is arranged in. Further, as shown in FIG. 2C, in the present embodiment, the pressing portion 13 is provided on both sides of the dropout prevention protrusion 12 in the height direction, and the tip of the pressing portion 13 (in the height direction). The positions of the upper and lower ends of the pressing portion 13 in FIG. 2 (c) are the same as the positions of the corresponding tips (upper and lower ends of the main body 11 in FIG. 2 (c)) of the main body 11. There is.

図３（ａ）は、シール部材１０を被シール面２０ａに設けられた溝部２１に装着する途中の状態を模式的に示す断面図である。図３（ｂ）は、シール部材１０を溝部２１に装着した状態を模式的に示す断面図である。また、図４（ａ）は、シール部材１０を二部材２０、３０間に組み付ける途中の状態を模式的に示す断面図である。図４（ｂ）は、シール部材１０を二部材２０、３０間に組み付けた状態を模式的に示す断面図である。上述のように、シール部材１０の内周側端部１２ａから外周側端部１１ａまでの径方向における寸法は、溝部２１の開口幅ｄよりもわずかに大きく設定されている。そのため、シール部材１０を溝部２１の開口部上に配置しただけでは、図３（ａ）に示すように、シール部材１０において脱落防止用突起１２が設けられている部分が溝部２１内に進入せず、開口部に係止された状態で留まることになる。当該状態で、本体部１１及び押圧部１３を同時に押下、あるいは、順次押下すると、図３（ｂ）に示すように、シール部材１０が溝部２１内に適切に装着された状態を容易に実現することができる。ここで、適切に装着された状態とは、溝部２１の底面２１ａと、当該底面２１ａと対向する本体部１１の先端１１ｂ（下端１１ｂ）とが確実に当接する状態、かつ、溝部２１の底面２１ａと、当該底面２１ａと対向する押圧部１３の先端１３ｂ（下端１３ｂ）とが確実に当接する状態を意味する。 FIG. 3A is a cross-sectional view schematically showing a state in which the seal member 10 is being mounted on the groove portion 21 provided on the surface to be sealed 20a. FIG. 3B is a cross-sectional view schematically showing a state in which the seal member 10 is mounted on the groove portion 21. Further, FIG. 4A is a cross-sectional view schematically showing a state in which the seal member 10 is being assembled between the two members 20 and 30. FIG. 4B is a cross-sectional view schematically showing a state in which the seal member 10 is assembled between the two members 20 and 30. As described above, the dimension in the radial direction from the inner peripheral side end portion 12a to the outer peripheral side end portion 11a of the seal member 10 is set to be slightly larger than the opening width d of the groove portion 21. Therefore, if the seal member 10 is simply arranged on the opening of the groove 21, as shown in FIG. 3A, the portion of the seal member 10 provided with the dropout prevention protrusion 12 can enter the groove 21. Instead, it stays locked in the opening. In this state, when the main body portion 11 and the pressing portion 13 are pressed at the same time or sequentially, as shown in FIG. 3 (b), a state in which the seal member 10 is appropriately mounted in the groove portion 21 is easily realized. be able to. Here, the properly mounted state is a state in which the bottom surface 21a of the groove portion 21 and the tip end 11b (lower end 11b) of the main body portion 11 facing the bottom surface 21a are surely in contact with each other, and the bottom surface 21a of the groove portion 21 is in contact with each other. Means a state in which the front end 13b (lower end 13b) of the pressing portion 13 facing the bottom surface 21a is surely in contact with the bottom surface 21a.

また、当該状態では、シール部材１０の外周側端部１１ａが、対向する溝部２１の外周側壁面２１ｃに圧接され、かつ、シール部材１０の内周側端部１２ａが、対向する溝部２１の内周側壁面２１ｂに圧接された状態となる。すなわち、シール部材１０は、溝部２１の外周側壁面２１ｃと内周側壁面２１ｂとの間に挟持された状態となる。したがって、例えば、溝部２１を備える部材２０を上下反転させたとしても、シール部材１０が溝部２１から離脱して落下することはない。 Further, in this state, the outer peripheral side end portion 11a of the seal member 10 is pressed against the outer peripheral side wall surface 21c of the facing groove portion 21, and the inner peripheral side end portion 12a of the seal member 10 is inside the facing groove portion 21. It is in a state of being pressed against the peripheral side wall surface 21b. That is, the seal member 10 is sandwiched between the outer peripheral side wall surface 21c and the inner peripheral side wall surface 21b of the groove portion 21. Therefore, for example, even if the member 20 including the groove portion 21 is turned upside down, the seal member 10 does not separate from the groove portion 21 and fall.

このように、本実施形態のシール部材１０では、シール部材１０を溝部２１に装着する際に、押圧部１３を押すという簡便な作業で、溝部２１内に脱落防止用突起１２を適切に配置することができる。その結果、シール部材１０が溝部２１内で傾いて配置された状態のまま二部材２０、３０間に組付けられることを防止でき、確実にシール機能を発揮させることができる。 As described above, in the seal member 10 of the present embodiment, when the seal member 10 is mounted on the groove portion 21, the drop-out prevention protrusion 12 is appropriately arranged in the groove portion 21 by a simple operation of pushing the pressing portion 13. be able to. As a result, it is possible to prevent the seal member 10 from being assembled between the two members 20 and 30 while being tilted and arranged in the groove 21, and the seal function can be reliably exerted.

以上のように、シール部材１０が溝部２１内に適切に配置された状態で、図４（ａ）に示すように、相手方の部材３０が溝部２１と対向する状態で配置され、部材２０と部材３０とが締結等により接合・固定される。このとき、シール部材１０は、図４（ｂ）に示すように、溝部２１の底面２１ａと部材３０の被シール面３０ａとの間で圧縮される。シール部材１０が高さ方向に圧縮されると、脱落防止用突起１２を設けた部分では、本体部１１、脱落防止用突起１２、及び押圧部１３は弾性変形し、溝部２１の底面２１ａ、内周側壁面２１ｂ、外周側壁面２１ｃ、及び部材３０の被シール面３０ａを所定のシール圧で押圧する状態で溝部２１内に収容される。 As described above, with the seal member 10 appropriately arranged in the groove portion 21, as shown in FIG. 4A, the mating member 30 is arranged in a state of facing the groove portion 21, and the member 20 and the member are arranged. 30 is joined and fixed by fastening or the like. At this time, as shown in FIG. 4B, the seal member 10 is compressed between the bottom surface 21a of the groove 21 and the surface to be sealed 30a of the member 30. When the seal member 10 is compressed in the height direction, the main body portion 11, the dropout prevention protrusion 12, and the pressing portion 13 are elastically deformed in the portion provided with the dropout prevention protrusion 12, and the inside of the bottom surface 21a of the groove portion 21. The peripheral side wall surface 21b, the outer peripheral side wall surface 21c, and the surface to be sealed 30a of the member 30 are housed in the groove 21 in a state of being pressed with a predetermined sealing pressure.

ここで、シール部材１０の効果をより具体的に説明するため、上述の押圧部１３を具備しない比較例に係るシール部材１００について説明する。図５（ａ）は、シール部材１００を溝部２１に装着する途中の状態を模式的に示す断面図である。図５（ｂ）は、シール部材１０を溝部２１に装着した状態を模式的に示す断面図である。なお、押圧部１３を具備しない点を除いてシール部材１００の構成はシール部材１０と同様であるため、対応する構成要素についてはシール部材１０と同一の符号を付している。 Here, in order to more specifically explain the effect of the seal member 10, the seal member 100 according to the comparative example not provided with the above-mentioned pressing portion 13 will be described. FIG. 5A is a cross-sectional view schematically showing a state in which the seal member 100 is being mounted on the groove portion 21. FIG. 5B is a cross-sectional view schematically showing a state in which the seal member 10 is mounted on the groove portion 21. Since the structure of the seal member 100 is the same as that of the seal member 10 except that the pressing portion 13 is not provided, the corresponding components are designated by the same reference numerals as those of the seal member 10.

シール部材１０と同様に、シール部材１００の内周側端部１２ａから外周側端部１１ａまでの径方向における寸法は、溝部２１の開口幅ｄよりもわずかに大きく設定されている。そのため、シール部材１００を溝部２１の開口部上に配置しただけでは、図５（ａ）に示すように、シール部材１００において脱落防止用突起１２が設けられている部分が溝部２１内に進入せず、開口部に係止された状態で留まることになる。当該状態で、本体部１１及び脱落防止用突起１２を同時に押下、あるいは、順次押下しても、押圧部１３を具備しないシール部材１００では、例えば、図５（ｂ）に示すように、弾性体である脱落防止用突起１２が溝部２１の内周側壁面２１ｂの上端のコーナー部と当接した場合に発生する反発力（弾性力）に阻害され、脱落防止用突起１２を溝部２１内に容易に進入させることができない。このような状態では、例えば、溝部２１を備える部材２０を上下反転させた場合、シール部材１００は溝部２１から離脱して落下してしまう。また、このような状態で部材３０を組み付けると、二部材２０、３０の間にシール部材１００が挟まれる噛み込みが発生することになる。このような噛み込みが発生すると、所望のシール性能を得ることができなくなる。 Similar to the seal member 10, the radial dimension of the seal member 100 from the inner peripheral side end portion 12a to the outer peripheral side end portion 11a is set to be slightly larger than the opening width d of the groove portion 21. Therefore, if the seal member 100 is simply placed on the opening of the groove 21, as shown in FIG. 5A, the portion of the seal member 100 provided with the dropout prevention protrusion 12 can enter the groove 21. Instead, it stays locked in the opening. In this state, even if the main body 11 and the dropout prevention protrusion 12 are pressed at the same time or sequentially, the seal member 100 that does not have the pressing portion 13 is an elastic body, for example, as shown in FIG. 5 (b). The dropout prevention protrusion 12 is hindered by the repulsive force (elastic force) generated when the dropout prevention protrusion 12 comes into contact with the upper end corner portion of the inner peripheral side wall surface 21b of the groove portion 21, and the dropout prevention protrusion 12 is easily inserted into the groove portion 21. Cannot enter. In such a state, for example, when the member 20 including the groove portion 21 is turned upside down, the seal member 100 separates from the groove portion 21 and falls. Further, if the member 30 is assembled in such a state, the seal member 100 is sandwiched between the two members 20 and 30, and biting occurs. When such biting occurs, the desired sealing performance cannot be obtained.

一方、脱落防止用突起１２に押圧部１３を備える本実施形態のシール部材１０では、簡便な作業で、溝部２１内に脱落防止用突起１２を適切に配置することができ、溝部２１からのシール部材１０の脱落を防止できるとともに、所望のシール性能を確実に得ることができる。 On the other hand, in the seal member 10 of the present embodiment in which the drop-out prevention protrusion 12 is provided with the pressing portion 13, the drop-out prevention protrusion 12 can be appropriately arranged in the groove portion 21 by a simple operation, and the seal from the groove portion 21 can be sealed. The member 10 can be prevented from falling off, and the desired sealing performance can be surely obtained.

以上説明したように、シール部材１０では、シール部材１０を溝部２１に装着する際に、押圧部１３を押すという簡便な作業で、溝部２１内に脱落防止用突起１２を適切に配置することができる。その結果、シール部材１０が溝部２１内で傾いて配置された状態のまま二部材２０、３０間に組付けられることを防止でき、確実にシール機能を発揮させることができる。 As described above, in the seal member 10, when the seal member 10 is mounted on the groove portion 21, the pressing portion 13 is pushed, and the drop-out prevention protrusion 12 can be appropriately arranged in the groove portion 21. can. As a result, it is possible to prevent the seal member 10 from being assembled between the two members 20 and 30 while being tilted and arranged in the groove 21, and the seal function can be reliably exerted.

また、シール部材１０は、特に好ましい形態として、脱落防止用突起１２の中央部に押圧部１３を備えている。このような構成を採用することで、押圧部１３に付与された外力を脱落防止用突起１２に効率よく伝えることができ、脱落防止用突起１２をよりスムーズに溝部２１内に配置することができる。また、脱落防止用突起１２の一部に押圧部１３を設ける構成であるため、脱落防止用突起１２の全体に押圧部を設ける場合に比べて溝部２１内の空間に占めるシール部材１０の割合（溝部に対するシール部材の充填率）をより低減することができる。なお、脱落防止用突起１２に配置される押圧部１３の位置及び数は本実施形態に限定されず、他の構成を採用することも可能である。 Further, the seal member 10 is provided with a pressing portion 13 at the center of the drop-out prevention protrusion 12 as a particularly preferable form. By adopting such a configuration, the external force applied to the pressing portion 13 can be efficiently transmitted to the dropout prevention protrusion 12, and the dropout prevention protrusion 12 can be arranged in the groove portion 21 more smoothly. .. Further, since the pressing portion 13 is provided in a part of the falling-out prevention protrusion 12, the ratio of the seal member 10 to the space in the groove portion 21 is larger than that in the case where the pressing portion is provided in the entire fall-out preventing protrusion 12. The filling rate of the seal member with respect to the groove portion) can be further reduced. The position and number of the pressing portions 13 arranged on the drop-out prevention protrusions 12 are not limited to this embodiment, and other configurations may be adopted.

また、シール部材１０は、特に好ましい形態として、円錐台状の押圧部１３を備えている。このような構成を採用することで、押圧部１３に付与された外力により、脱落防止用突起１２をよりスムーズに溝部２１内に配置するという機能を損なうことなく、押圧部１３の体積を減少させることができる。したがって、溝部２１内の空間に占めるシール部材１０の割合をより低減することができるとともに、脱落防止用突起１２をよりスムーズに溝部２１内に配置することができる。なお、押圧部１３の形状は本実施形態に限定されず、他の形状を採用することも可能である。例えば、円柱状や角柱状の押圧部を採用することも可能である。また、押圧部と本体部との間に空間を設けることも必須ではなく、押圧部と本体部とが一体的に形成された構成を採用することも可能である。 Further, the seal member 10 is provided with a truncated cone-shaped pressing portion 13 as a particularly preferable form. By adopting such a configuration, the volume of the pressing portion 13 is reduced without impairing the function of arranging the dropout prevention protrusion 12 more smoothly in the groove portion 21 due to the external force applied to the pressing portion 13. be able to. Therefore, the ratio of the seal member 10 to the space in the groove portion 21 can be further reduced, and the dropout prevention protrusion 12 can be arranged in the groove portion 21 more smoothly. The shape of the pressing portion 13 is not limited to this embodiment, and other shapes may be adopted. For example, it is also possible to adopt a columnar or prismatic pressing portion. Further, it is not essential to provide a space between the pressing portion and the main body portion, and it is also possible to adopt a configuration in which the pressing portion and the main body portion are integrally formed.

また、シール部材１０は、特に好ましい形態として、脱落防止用突起１２の高さ方向の両面に押圧部１３を備え、高さ方向で線対称となる形状を採用している。このような構成を採用することで、溝部２１内へシール部材１０を挿入する表裏の向きに関わらず、上述の効果を得ることができる。なお、脱落防止用突起１２の高さ方向の両面に押圧部１３を設けることは必須ではなく、脱落防止用突起１２の高さ方向の一方面にのみ押圧部１３を設ける構成を採用することも可能である。 Further, as a particularly preferable form, the seal member 10 is provided with pressing portions 13 on both sides of the drop-out prevention protrusion 12 in the height direction, and adopts a shape that is line-symmetrical in the height direction. By adopting such a configuration, the above-mentioned effect can be obtained regardless of the front and back directions in which the seal member 10 is inserted into the groove portion 21. It is not essential to provide the pressing portions 13 on both sides of the falling prevention protrusion 12 in the height direction, and it is also possible to adopt a configuration in which the pressing portions 13 are provided only on one surface of the falling prevention protrusion 12 in the height direction. It is possible.

また、シール部材１０は、特に好ましい形態として、本体部１１の高さ方向の中央部に設けられた脱落防止用突起１２を備えている。このような構成を採用することで、脱落防止用突起１２が本体部１１の高さ方向の中央部と異なる位置に設けられる構成に比べて、溝部２１内への装着性と、脱落防止用突起１２による脱落防止機能とをバランスよく実現することができる。なお、本体部１１の高さ方向の中央部に脱落防止用突起１２を設けることは必須ではなく、本体部１１の高さ方向の他の位置に脱落防止用突起１２を配置する構成を排除するものではない。 Further, as a particularly preferable form, the seal member 10 includes a drop-out prevention protrusion 12 provided at the center of the main body 11 in the height direction. By adopting such a configuration, as compared with the configuration in which the dropout prevention protrusion 12 is provided at a position different from the central portion in the height direction of the main body portion 11, the fitability in the groove portion 21 and the dropout prevention protrusion 12 are provided. It is possible to realize the dropout prevention function according to 12 in a well-balanced manner. It is not essential to provide the fall-prevention protrusion 12 at the center of the main body 11 in the height direction, and the configuration in which the fall-prevention protrusion 12 is arranged at another position in the height direction of the main body 11 is eliminated. It's not a thing.

また、シール部材１０は、特に好ましい形態として、本体部１１の高さ方向の上端の位置と同じ位置に、高さ方向の上端の位置が配置された押圧部１３を備えている。このような構成を採用することで、押圧部１３に外力を容易に付与することができる。なお、本体部１１の高さ方向の上端の位置と押圧部１３の高さ方向の上端の位置を同じ位置に配置することは必須ではない。押圧機能を実現でき、かつシール性能に影響を及ぼさない範囲において、本体部１１の高さ方向の上端と押圧部１３の高さ方向の上端とを同一の位置に配置してもよく、異なる位置に配置してもよい。 Further, as a particularly preferable form, the seal member 10 includes a pressing portion 13 in which the position of the upper end in the height direction is arranged at the same position as the position of the upper end in the height direction of the main body portion 11. By adopting such a configuration, an external force can be easily applied to the pressing portion 13. It is not essential that the position of the upper end of the main body 11 in the height direction and the position of the upper end of the pressing portion 13 in the height direction are arranged at the same position. As long as the pressing function can be realized and the sealing performance is not affected, the upper end of the main body 11 in the height direction and the upper end of the pressing portion 13 in the height direction may be arranged at the same position, or at different positions. May be placed in.

続いて、図面に基づいて、本発明に係るシール部材の他の事例について説明する。図６（ａ）は本発明の一実施形態に係る他のシール部材４０における脱落防止用突起４２部分を模式的に示す拡大平面図である。図６（ｂ）は図６（ａ）に示すシール部材４０の内側面を示す図である。図６（ｃ）は図６（ｂ）に示すシール部材４０の中央縦断面図である。また、図７（ａ）は本発明の一実施形態に係る他のシール部材５０における脱落防止用突起４２部分を模式的に示す拡大平面図である。図７（ｂ）は図７（ａ）に示すシール部材５０の内側面を示す図である。図７（ｃ）は図７（ｂ）に示すシール部材５０の中央縦断面図である。図６（ｂ）、図６（ｃ）、図７（ｂ）、及び図７（ｃ）では、図中の上下方向が高さ方向に対応し、図６（ａ）、図６（ｃ）、図７（ａ）、及び図７（ｃ）では、図中の左右方向が径方向に対応する。また、上述のシール部材１０と同様の機能を有するシール部材４０、５０の構成要素には、シール部材１０と同一の符号を用いている。 Subsequently, other examples of the sealing member according to the present invention will be described with reference to the drawings. FIG. 6A is an enlarged plan view schematically showing a portion of a protrusion for preventing falling off 42 in another seal member 40 according to an embodiment of the present invention. FIG. 6B is a diagram showing an inner surface of the seal member 40 shown in FIG. 6A. FIG. 6 (c) is a central vertical sectional view of the seal member 40 shown in FIG. 6 (b). Further, FIG. 7A is an enlarged plan view schematically showing a portion of a protrusion for preventing falling off 42 in another seal member 50 according to the embodiment of the present invention. FIG. 7B is a diagram showing an inner surface of the seal member 50 shown in FIG. 7A. FIG. 7 (c) is a central vertical sectional view of the seal member 50 shown in FIG. 7 (b). In FIGS. 6 (b), 6 (c), 7 (b), and 7 (c), the vertical direction in the figure corresponds to the height direction, and FIGS. 6 (a) and 6 (c) , 7 (a) and 7 (c), the left-right direction in the figure corresponds to the radial direction. Further, the same reference numerals as those of the seal member 10 are used for the components of the seal members 40 and 50 having the same functions as the seal member 10 described above.

上述のシール部材１０では、例示として、円錐台状の押圧部１３が脱落防止用突起１２から直接突出する事例について説明したが、このような構成は必須ではない。例えば、図６（ａ）から図６（ｃ）に示すように、円錐台状の押圧部４３と脱落防止用突起４２との間に台座１４が設けられていてもよい。 In the above-mentioned seal member 10, as an example, a case where the truncated cone-shaped pressing portion 13 directly protrudes from the dropout prevention protrusion 12 has been described, but such a configuration is not essential. For example, as shown in FIGS. 6A to 6C, a pedestal 14 may be provided between the truncated cone-shaped pressing portion 43 and the dropout prevention protrusion 42.

このシール部材４０では、脱落防止用突起４２の高さ方向の厚みをシール部材１０の半分程度とし、当該厚みの減少分に対応する高さ方向の厚みを有する台座１４を、脱落防止用突起４２の高さ方向の両面に配置している。なお、特に限定されないが、この例では、高さ方向において、押圧部４３の両端の位置が、本体部１１の両端の位置よりも外側に位置する構成を採用している。 In the seal member 40, the thickness of the fall-prevention protrusion 42 in the height direction is about half that of the seal member 10, and the pedestal 14 having the thickness corresponding to the decrease in the thickness is the fall-prevention protrusion 42. It is placed on both sides in the height direction of. Although not particularly limited, in this example, a configuration is adopted in which the positions of both ends of the pressing portion 43 are located outside the positions of both ends of the main body portion 11 in the height direction.

図６（ａ）に示すように、台座１４は、平面視において、押圧部４３の底部４３ａの半径よりも数ｍｍ程度大きい半径を有する半円部１４ａを先端に有し、当該半円部１４ａの直径と同一の幅を有する矩形部１４ｂが半円部１４ａから延出された形状を有する。そして、半円部１４ａの頂点が、シール部材４０の内周側端部４２ａと重なる位置に配置されている。このような構成を採用することで、溝部２１内の空間に占めるシール部材４０の割合をシール部材１０に比べてより低減することができる。また、溝部２１内の空間に占めるシール部材１０の割合をさらに低減する観点では、図７（ａ）から図７（ｃ）に示すように、図６（ａ）から図６（ｃ）に示すシール部材４０の台座１４を採用することなく、脱落防止用突起４２から直接突出する円錐台状の押圧部５３を備える構成を採用することも可能である。なお、特に限定されないが、この例では、高さ方向において、押圧部５３の両端の位置が、本体部１１の両端の位置よりも内側に位置する構成を採用している。 As shown in FIG. 6A, the pedestal 14 has a semicircular portion 14a at the tip having a radius several mm larger than the radius of the bottom portion 43a of the pressing portion 43 in a plan view, and the semicircular portion 14a A rectangular portion 14b having the same width as the diameter of the semicircular portion 14a has a shape extending from the semicircular portion 14a. The apex of the semicircular portion 14a is arranged at a position where it overlaps with the inner peripheral side end portion 42a of the seal member 40. By adopting such a configuration, the ratio of the seal member 40 to the space in the groove 21 can be further reduced as compared with the seal member 10. Further, from the viewpoint of further reducing the ratio of the seal member 10 to the space in the groove 21, as shown in FIGS. 7 (a) to 7 (c), FIGS. 6 (a) to 6 (c) are shown. Instead of adopting the pedestal 14 of the seal member 40, it is also possible to adopt a configuration including a cone-shaped pressing portion 53 that directly protrudes from the dropout prevention protrusion 42. Although not particularly limited, in this example, a configuration is adopted in which the positions of both ends of the pressing portion 53 are located inside the positions of both ends of the main body portion 11 in the height direction.

また、図８（ａ）は本発明の一実施形態に係る他のシール部材６０における脱落防止用突起６２部分を模式的に示す拡大平面図である。図８（ｂ）は図８（ａ）に示すシール部材６０の内側面を示す図である。図８（ｃ）は図８（ｂ）に示すシール部材６０の中央縦断面図である。また、図９（ａ）は本発明の一実施形態に係る他のシール部材７０における脱落防止用突起７２部分を模式的に示す拡大平面図である。図９（ｂ）は図９（ａ）に示すシール部材７０の内側面を示す図である。図９（ｃ）は図９（ｂ）に示すシール部材７０の中央縦断面図である。図８（ｂ）、図８（ｃ）、図９（ｂ）、及び図９（ｃ）では、図中の上下方向が高さ方向に対応し、図８（ａ）、図８（ｃ）、図９（ａ）及び図９（ｃ）では、図中の左右方向が径方向に対応する。また、上述のシール部材１０と同様の機能を有するシール部材６０、７０の構成要素には、シール部材１０と同一の符号を用いている。 Further, FIG. 8A is an enlarged plan view schematically showing a portion of a protrusion 62 for preventing falling off in another seal member 60 according to the embodiment of the present invention. FIG. 8B is a diagram showing an inner surface of the seal member 60 shown in FIG. 8A. FIG. 8 (c) is a central vertical sectional view of the seal member 60 shown in FIG. 8 (b). Further, FIG. 9A is an enlarged plan view schematically showing a portion of a protrusion 72 for preventing falling off in another seal member 70 according to the embodiment of the present invention. 9 (b) is a view showing an inner side surface of the seal member 70 shown in FIG. 9 (a). 9 (c) is a central vertical sectional view of the seal member 70 shown in FIG. 9 (b). In FIGS. 8 (b), 8 (c), 9 (b), and 9 (c), the vertical direction in the figure corresponds to the height direction, and FIGS. 8 (a) and 8 (c). , 9 (a) and 9 (c), the left-right direction in the figure corresponds to the radial direction. Further, the same reference numerals as those of the seal member 10 are used for the components of the seal members 60 and 70 having the same functions as the seal member 10 described above.

上述のシール部材１０では、例示として、脱落防止用突起１２が、平面視において概ね半楕円状の形状を有し、その長径の寸法が概ね押圧部１３の底部１３ａの直径の３倍程度である事例について説明したが、このような構成は必須ではない。例えば、図８（ａ）から図８（ｃ）に示すように、平面視において、押圧部１３の底部１３ａの周囲を数ｍｍ程度の幅で取り囲む状態とした形状（あるいは、押圧部１３の底部１３ａと整合する形状）を有する脱落防止用突起６２を採用することもできる。なお、本態様においても、本体部１１との接続部分である、脱落防止用突起６２の基部（本体部１１の近傍）の内周面は、強度確保の観点から、本体部１１に近づくほど徐々に本体部１１の内周面における円周方向の幅が次第に大きくなる凹曲面により構成されている。 In the seal member 10 described above, as an example, the dropout prevention protrusion 12 has a substantially semi-elliptical shape in a plan view, and the major axis dimension thereof is approximately three times the diameter of the bottom portion 13a of the pressing portion 13. Although the case has been explained, such a configuration is not essential. For example, as shown in FIGS. 8 (a) to 8 (c), in a plan view, the shape (or the bottom of the pressing portion 13) is such that the circumference of the bottom 13a of the pressing portion 13 is surrounded by a width of about several mm. It is also possible to adopt a drop-out prevention protrusion 62 having a shape (shape consistent with 13a). Also in this embodiment, the inner peripheral surface of the base portion (near the main body portion 11) of the dropout prevention protrusion 62, which is the connection portion with the main body portion 11, gradually approaches the main body portion 11 from the viewpoint of ensuring strength. It is composed of a concave curved surface in which the width of the inner peripheral surface of the main body 11 in the circumferential direction gradually increases.

このような構成を採用することで、脱落防止用突起６２の先端６２ａと溝部２１の内周面との接触面積が減少して脱落防止機能がやや低下することになるが、溝部２１内の空間に占めるシール部材６０の割合をシール部材１０に比べてより低減することができる。また、溝部２１内の空間に占めるシール部材１０の割合をさらに低減する観点では、図９（ａ）から図９（ｃ）に示すような、シール部材４０と同様の台座１４を押圧部１３と脱落防止用突起７２との間に設けた構成を採用することも可能である。 By adopting such a configuration, the contact area between the tip 62a of the dropout prevention protrusion 62 and the inner peripheral surface of the groove 21 is reduced, and the dropout prevention function is slightly reduced, but the space inside the groove 21 The ratio of the seal member 60 to the seal member 60 can be further reduced as compared with the seal member 10. Further, from the viewpoint of further reducing the ratio of the seal member 10 to the space in the groove portion 21, a pedestal 14 similar to the seal member 40 as shown in FIGS. 9 (a) to 9 (c) is used as the pressing portion 13. It is also possible to adopt a configuration provided between the protrusion for preventing falling off 72.

さらに、図１０（ａ）は本発明の一実施形態に係る他のシール部材８０における脱落防止用突起８２部分を模式的に示す拡大平面図である。図１０（ｂ）は図１０（ａ）に示すシール部材８０の内側面を示す図である。図１１（ａ）は図１０（ｂ）に示すシール部材８０の中央縦断面図である。図１１（ｂ）は図１０（ｂ）に示すシール部材８０を溝部２１に装着した状態を模式的に示す断面図である。図１０（ｂ）、図１１（ａ）、及び図１１（ｂ）では、図中の上下方向が高さ方向に対応し、図１０（ａ）、図１１（ａ）及び図１１（ｂ）では、図中の左右方向が径方向に対応する。また、上述のシール部材１０と同様の機能を有するシール部材８０の構成要素には、シール部材１０と同一の符号を用いている。 Further, FIG. 10A is an enlarged plan view schematically showing a portion of a protrusion for preventing falling off 82 in another seal member 80 according to the embodiment of the present invention. FIG. 10B is a diagram showing an inner surface of the seal member 80 shown in FIG. 10A. FIG. 11A is a central vertical sectional view of the seal member 80 shown in FIG. 10B. FIG. 11B is a cross-sectional view schematically showing a state in which the seal member 80 shown in FIG. 10B is mounted on the groove portion 21. In FIGS. 10 (b), 11 (a), and 11 (b), the vertical direction in the figure corresponds to the height direction, and FIGS. 10 (a), 11 (a), and 11 (b) Then, the left-right direction in the figure corresponds to the radial direction. Further, the same reference numerals as those of the seal member 10 are used for the components of the seal member 80 having the same function as the seal member 10 described above.

上述のシール部材１０では、例示として、押圧部１３の形状が、円錐台状である事例について説明したが、上述のとおり、押圧部１３の形状は任意である。例えば、図１０（ａ）、図１０（ｂ）、図１１（ａ）、及び図１１（ｂ）に示すように、円弧状の先端部を有する台形状の押圧部８３を採用することもできる。このような構成を採用することで、押圧部８３の面積が大きくなるため、ユーザはより容易に脱落防止用突起８２を押下することができる。なお、特に限定されないが、この事例では、押圧部８３を大きくしたことにより、溝部２１内の空間に占めるシール部材８０の割合が大きくなることを抑制するため、押圧部８３を脱落防止用突起８２の高さ方向の一方面のみに設けている。 In the above-mentioned seal member 10, the case where the shape of the pressing portion 13 is a truncated cone shape has been described as an example, but as described above, the shape of the pressing portion 13 is arbitrary. For example, as shown in FIGS. 10 (a), 10 (b), 11 (a), and 11 (b), a trapezoidal pressing portion 83 having an arcuate tip portion can also be adopted. .. By adopting such a configuration, the area of the pressing portion 83 becomes large, so that the user can more easily press the drop-out prevention protrusion 82. Although not particularly limited, in this case, in order to prevent the ratio of the seal member 80 to occupy the space in the groove 21 from being increased by increasing the pressing portion 83, the pressing portion 83 is provided with a protrusion for preventing falling off 82. It is provided on only one side in the height direction of.

このように、押圧部８３を脱落防止用突起８２の高さ方向の一方面のみに設けた構成であっても、シール部材１０と同様に、溝部２１の開口部に係止された状態で、本体部１１及び押圧部８３を同時に押下、あるいは、順次押下すると、図１１（ｂ）に示すように、シール部材１０が溝部２１内に適切に装着された状態を容易に実現することができる。なお、ここでは、適切に装着された状態とは、溝部２１の底面２１ａと、当該底面２１ａと対向する本体部１１の先端１１ｂ（下端１１ｂ）とが確実に当接する状態、かつ、溝部２１の内周側壁面２１ｂと、当該内周側壁面２１ｂと対向する脱落防止用突起８２の内周側端部８２ａとが確実に当接する状態を意味する。 In this way, even if the pressing portion 83 is provided on only one surface of the dropout prevention protrusion 82 in the height direction, the pressing portion 83 is locked in the opening of the groove portion 21 as in the seal member 10. When the main body portion 11 and the pressing portion 83 are pressed at the same time or sequentially, as shown in FIG. 11B, a state in which the seal member 10 is appropriately mounted in the groove portion 21 can be easily realized. Here, the properly mounted state is a state in which the bottom surface 21a of the groove portion 21 and the tip end 11b (lower end 11b) of the main body portion 11 facing the bottom surface 21a are surely in contact with each other, and the groove portion 21 is in contact with each other. It means a state in which the inner peripheral side wall surface 21b and the inner peripheral side end portion 82a of the dropout prevention protrusion 82 facing the inner peripheral side wall surface 21b are surely in contact with each other.

また、図１２（ａ）は本発明の一実施形態に係る他のシール部材９０における脱落防止用突起１２部分を模式的に示す拡大平面図である。図１２（ｂ）は図１２（ａ）に示すシール部材９０の内側面を示す図である。図１２（ｃ）は図１２（ｂ）に示すシール部材９０の中央縦断面図である。図１２（ｂ）及び図１２（ｃ）では、図中の上下方向が高さ方向に対応し、図１２（ａ）及び図１２（ｃ）では、図中の左右方向が径方向に対応する。また、上述のシール部材１０と同様の機能を有するシール部材９０の構成要素には、シール部材１０と同一の符号を用いている。 Further, FIG. 12A is an enlarged plan view schematically showing a portion of a protrusion 12 for preventing falling off in another seal member 90 according to the embodiment of the present invention. FIG. 12B is a diagram showing an inner surface of the seal member 90 shown in FIG. 12A. 12 (c) is a central vertical sectional view of the seal member 90 shown in FIG. 12 (b). In FIGS. 12 (b) and 12 (c), the vertical direction in the figure corresponds to the height direction, and in FIGS. 12 (a) and 12 (c), the left-right direction in the figure corresponds to the radial direction. .. Further, the same reference numerals as those of the seal member 10 are used for the components of the seal member 90 having the same function as the seal member 10 described above.

上述のシール部材１０では、例示として、円錐台状の押圧部１３の底部１３ａが、脱落防止用突起１２の本体部１１側の端部に接する状態で配置された事例について説明したが、押圧部１３の配置位置は任意に設定可能である。例えば、図１２（ａ）から図１２（ｃ）に示すように、円錐台状の押圧部９３の底部９３ａの内周側の端部が、シール部材９０の内周側端部１２ａと重なる状態とすることで、本体部１１と押圧部９３との間に隙間９４（連結部９４）を設ける構成を採用することもできる。このような構成を採用することで、溝部２１内の空間に占めるシール部材９０の割合をより低減することができ、溝部２１内でシール部材９０がボリューム過多になることを回避して容易に設計を行うことができる。 In the above-mentioned seal member 10, as an example, the case where the bottom portion 13a of the truncated cone-shaped pressing portion 13 is arranged in contact with the end portion of the falling-out prevention protrusion 12 on the main body portion 11 side has been described. The arrangement position of 13 can be arbitrarily set. For example, as shown in FIGS. 12 (a) to 12 (c), a state in which the end of the bottom portion 93a of the truncated cone-shaped pressing portion 93 on the inner peripheral side overlaps with the inner peripheral side end portion 12a of the sealing member 90. Therefore, it is possible to adopt a configuration in which a gap 94 (connecting portion 94) is provided between the main body portion 11 and the pressing portion 93. By adopting such a configuration, the ratio of the seal member 90 to the space in the groove 21 can be further reduced, and the seal member 90 can be easily designed by avoiding an excessive volume in the groove 21. It can be performed.

以上説明したように、本発明によれば、シール部材が傾いた状態のまま二部材間に組付けられてしまうことを抑制して、シール機能を確実に発揮させることができる。 As described above, according to the present invention, it is possible to prevent the seal member from being assembled between the two members in an inclined state, and to reliably exert the seal function.

なお、上述の実施形態は本発明の技術的範囲を制限するものではなく、既に記載したもの以外でも、本発明の範囲内で種々の変形や応用が可能である。例えば、上述の実施形態では、脱落防止用突起を本体部の内周面に設けた構成について説明したが、脱落防止用突起は、本体部の外周面に設けた場合でも同様の効果を奏することができる。また、上述の実施形態では、平面視における溝部の形状が円形状である事例について説明したが、溝部の形状は環状であれば任意の形状を採用することができる。加えて、上述の実施形態で説明した各構成要素の形態を適宜組み合わせてシール部材を構成することも可能である。 It should be noted that the above-described embodiment does not limit the technical scope of the present invention, and various modifications and applications other than those already described can be made within the scope of the present invention. For example, in the above-described embodiment, the configuration in which the drop-out prevention protrusion is provided on the inner peripheral surface of the main body portion has been described, but the drop-out prevention protrusion has the same effect even when it is provided on the outer peripheral surface of the main body portion. Can be done. Further, in the above-described embodiment, the case where the shape of the groove portion in the plan view is circular has been described, but any shape can be adopted as long as the shape of the groove portion is annular. In addition, it is also possible to form the seal member by appropriately combining the forms of the respective components described in the above-described embodiment.

１０、４０、５０、６０、７０、８０、９０シール部材
１１本体部
１２、４２、６２、７２、８２脱落防止用突起
１３、４３、５３、８３、９３押圧部
２０部材（二部材の一方の部材）
２０ａ被シール面
２１溝部
２１ａ底面
２１ｂ、２２ｂ壁面
３０部材（二部材の他方の部材）
３０ａ被シール面 10, 40, 50, 60, 70, 80, 90 Sealing member 11 Main body 12, 42, 62, 72, 82 Falling prevention protrusion 13, 43, 53, 83, 93 Pressing part 20 member (one of the two members) Element)
20a Sealed surface 21 Groove 21a Bottom surface 21b, 22b Wall surface 30 Member (the other member of the two members)
30a Sealed surface

Claims

二部材のうちの一方の部材の被シール面に設けられた溝部に装着され、前記二部材間をシールする環状のシール部材であって、
前記溝部内に配置されるとともに、前記二部材によって圧縮されて前記二部材間をシールする本体部と、
前記本体部の一側面側に、前記本体部よりも高さ方向の寸法が小さい状態で複数設けられるとともに、前記溝部内に配置された際に、対向する前記溝部の壁面に先端が当接する脱落防止用突起と、
前記脱落防止用突起の一部分から前記高さ方向に突出する状態で設けられ、前記溝部内に前記脱落防止用突起を配置する際に押圧される押圧部と、
を備えるシール部材。 An annular sealing member that is mounted in a groove provided on the surface to be sealed of one of the two members and seals between the two members.
A main body that is arranged in the groove and is compressed by the two members to seal between the two members.
A plurality of pieces are provided on one side surface side of the main body portion in a state where the dimension in the height direction is smaller than that of the main body portion, and when arranged in the groove portion, the tip abuts on the wall surface of the groove portion facing the main body portion and falls off. With preventive protrusions
A pressing portion that is provided so as to protrude in the height direction from a part of the fall prevention protrusion and is pressed when the fall prevention protrusion is arranged in the groove portion.
A seal member comprising.

前記押圧部と前記本体部との間に間隔を有する、請求項１記載のシール部材。 The seal member according to claim 1, wherein there is a gap between the pressing portion and the main body portion.

前記押圧部が前記脱落防止用突起の中央部に設けられる、請求項１又は請求項２記載のシール部材。 The seal member according to claim 1 or 2, wherein the pressing portion is provided at a central portion of the dropout prevention protrusion.

前記押圧部の形状が円錐台状である、請求項１から請求項３のいずれか１項に記載のシール部材。 The seal member according to any one of claims 1 to 3, wherein the pressing portion has a truncated cone shape.

前記押圧部が前記脱落防止用突起の高さ方向の両面に設けられる、請求項１から請求項４のいずれか１項に記載のシール部材。 The seal member according to any one of claims 1 to 4, wherein the pressing portion is provided on both sides of the drop-out prevention protrusion in the height direction.

前記脱落防止用突起が前記本体部の前記高さ方向の中央部に設けられる、請求項１から請求項５のいずれか１項に記載のシール部材。 The seal member according to any one of claims 1 to 5, wherein the drop-out prevention protrusion is provided at the center of the main body in the height direction.

前記押圧部の前記高さ方向の上端の位置と、前記本体部の前記高さ方向の上端の位置とは同じ位置である、請求項１から請求項６のいずれか１項に記載のシール部材。 The seal member according to any one of claims 1 to 6, wherein the position of the upper end of the pressing portion in the height direction and the position of the upper end of the main body portion in the height direction are the same. ..