JP6573772B2 - Sealing device - Google Patents

Sealing device Download PDF

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JP6573772B2
JP6573772B2 JP2015071776A JP2015071776A JP6573772B2 JP 6573772 B2 JP6573772 B2 JP 6573772B2 JP 2015071776 A JP2015071776 A JP 2015071776A JP 2015071776 A JP2015071776 A JP 2015071776A JP 6573772 B2 JP6573772 B2 JP 6573772B2
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gasket
groove
members
narrow space
width dimension
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JP2016191425A (en
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隆之 堀本
隆之 堀本
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Nok Corp
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Nok Corp
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Description

本発明は、シール技術に係る密封装置に関する。本発明の密封装置は例えば、燃料電池用ガスケットとして用いられる。 The present invention relates to a sealing device according to a sealing technique. The sealing device of the present invention is used, for example, as a fuel cell gasket .

従来から図５（Ａ）に示すように、互いに対向する２部材１１，２１のうちの一方の部材１１の対向面１２に設けた装着溝１３にガスケット３１を装着し、このガスケット３１を他方の部材２１の対向面２２に密接させることにより２部材１１，２１間をシールする密封装置１が知られている。装着溝１３は断面長方形状に形成されている。   Conventionally, as shown in FIG. 5A, a gasket 31 is mounted in a mounting groove 13 provided on the facing surface 12 of one member 11 of the two members 11 and 21 facing each other, and the gasket 31 is mounted on the other side. There is known a sealing device 1 that seals between two members 11 and 21 by closely contacting an opposing surface 22 of a member 21. The mounting groove 13 has a rectangular cross section.

ところで昨今、燃料電池の分野では、燃料電池スタックの反応面の平面積を大きく確保するため、ガスケット３１を装着する装着溝１３の溝幅寸法ｗ１が縮小化される傾向にある。一方、燃料電池の作動に係る発電時からその後の放置時へかけての温度変化に伴ってシール組み付け部のクリアランスｃの変化が大きい場合には、図５（Ｂ）に示すようにガスケット３１の断面形状を縦長形状とする必要がある。したがって溝幅寸法ｗ１の小さな装着溝１３に縦長形状のガスケット３１を装着することから、ガスケット３１はその幅寸法ｗ２が随分と小さなものとなる。 Recently, in the field of fuel cells, the groove width dimension w 1 of the mounting groove 13 in which the gasket 31 is mounted tends to be reduced in order to ensure a large plane area of the reaction surface of the fuel cell stack. On the other hand, when the change in the clearance c of the seal assembling portion is large due to the temperature change from the time of power generation related to the operation of the fuel cell to the time when the fuel cell is left standing, as shown in FIG. The cross-sectional shape needs to be a vertically long shape. Accordingly, since mounting the gasket 31 of the elongated shape in a small mounting groove 13 of the groove width w 1, the gasket 31 is its width w 2 is much small.

しかしながらこのような縦長形状のガスケット３１には、ゴム硬度が低い場合にガスケット３１が装着溝１３内で倒れやすいと云う不都合があり、反対にゴム硬度が高い場合にはガスケット３１の反発力が大きくなり過ぎることがある。   However, such a vertically long gasket 31 has a disadvantage that the gasket 31 is liable to fall in the mounting groove 13 when the rubber hardness is low. On the contrary, when the rubber hardness is high, the repulsive force of the gasket 31 is large. It may become too much.

また、ガスケット３１が装着溝１３内で倒れるのを抑制するため、図６に示すようにガスケット３１の側面に倒れ防止用の突起４１を設け、この突起４１を装着溝１３の溝側面部１３ｃに接触する技術が開発されている（特許文献１参照）。   In order to prevent the gasket 31 from falling in the mounting groove 13, as shown in FIG. 6, a protrusion 41 for preventing the falling is provided on the side surface of the gasket 31, and this protrusion 41 is provided on the groove side surface portion 13 c of the mounting groove 13. The technique which contacts is developed (refer patent document 1).

特開２００２−３４０１９０号公報（図４）JP 2002-340190 A (FIG. 4)

しかしながらこの図６の技術によると、ガスケット３１の側面に突起４１を一体に設けるため、ガスケット３１を成形するゴム金型のキャビティ内面に突起４１を成形するための凹部形状を設けなければならない。したがってゴム金型のキャビティ形状が複雑になる不都合がある。   However, according to the technique of FIG. 6, in order to integrally provide the protrusion 41 on the side surface of the gasket 31, it is necessary to provide a concave shape for forming the protrusion 41 on the inner surface of the cavity of the rubber mold for forming the gasket 31. Therefore, there is a disadvantage that the cavity shape of the rubber mold becomes complicated.

本発明は以上の点に鑑みて、ガスケットの断面形状を縦長形状としなくてもシール組み付け部のクリアランスの変化に対応することができ、また、ガスケットの側面に倒れ防止用の突起を設けなくてもガスケットが装着溝内で倒れることがない密封装置を提供することを目的とする。   In view of the above points, the present invention can cope with a change in the clearance of the seal assembly portion even if the cross-sectional shape of the gasket is not a vertically long shape, and there is no need to provide a protrusion for preventing the collapse on the side surface of the gasket. Another object of the present invention is to provide a sealing device in which the gasket does not fall in the mounting groove.

本発明は上記目的を達成するために以下の手段を採用した。
本発明の密封装置は、互いに対向する２部材のうちの一方の部材に設けた装着溝に装着されるガスケットが他方の部材に密接することにより前記２部材間をシールする密封装置であって、前記装着溝の内面における溝側面部にテーパー形状を備える絞り部を設けるとともに前記絞り部よりも溝底部側に幅狭空間部を設け、前記ガスケットの幅寸法を前記絞り部の最小溝幅寸法よりも大きく設定し、前記ガスケットは、前記２部材間のクリアランスが大きく前記ガスケットが低圧縮の状態に置かれるときと、前記２部材間のクリアランスが小さく前記ガスケットが高圧縮の状態に置かれるときとで前記ガスケットの装着状態を異にするよう設定され、前記２部材間のクリアランスが大きく前記ガスケットが低圧縮の状態に置かれるとき、前記ガスケットは前記２部材の組み付け荷重によって前記絞り部のテーパー形状に押し付けられることによりシール面圧を発生し、このとき前記ガスケットは前記幅狭空間部に圧入されず、前記２部材間のクリアランスが小さく前記ガスケットが高圧縮の状態に置かれるとき、前記ガスケットはその一部が前記幅狭空間部に圧入されることを特徴とする（請求項１）。 In order to achieve the above object, the present invention employs the following means.
The sealing device of the present invention is a sealing device that seals between the two members by bringing a gasket mounted in a mounting groove provided in one of two members facing each other into close contact with the other member, A throttle part having a taper shape is provided on the groove side surface on the inner surface of the mounting groove, and a narrow space part is provided on the groove bottom side of the throttle part, and the width dimension of the gasket is made smaller than the minimum groove width dimension of the throttle part. The gasket has a large clearance between the two members when the gasket is placed in a low compression state, and when the gasket is placed in a low compression state with a small clearance between the two members. When the gasket is mounted in a different state and the clearance between the two members is large, the gasket is placed in a low compression state. The ket is pressed against the tapered shape of the throttle portion by the assembly load of the two members to generate a seal surface pressure. At this time, the gasket is not press-fitted into the narrow space portion, and the clearance between the two members is small. When the gasket is placed in a highly compressed state, a part of the gasket is press-fitted into the narrow space portion (Claim 1).

本発明によれば、２部材間のクリアランスが比較的大きくてガスケットが低圧縮の状態に置かれるときに、ガスケットが２部材の組み付け荷重によって絞り部のテーパー形状に押し付けられる。したがってこのようにガスケットが絞り部のテーパー形状に押し付けられることにより、シール面圧が発生するので、シール性が成立する。   According to the present invention, when the clearance between the two members is relatively large and the gasket is placed in a low compression state, the gasket is pressed against the tapered shape of the throttle portion by the assembly load of the two members. Therefore, since the gasket is pressed against the tapered shape of the throttle portion in this way, a sealing surface pressure is generated, and thus sealing performance is established.

一方、２部材間のクリアランスが比較的小さくてガスケットが高圧縮の状態に置かれるときには、ガスケットがその一部において幅狭空間部に圧入される。したがってこのようにガスケットの一部が幅狭空間部に圧入されることにより、反発力が低減されるので、反発力が大きくなり過ぎることがない。   On the other hand, when the clearance between the two members is relatively small and the gasket is placed in a highly compressed state, the gasket is partially pressed into the narrow space. Therefore, since a part of the gasket is press-fitted into the narrow space portion in this way, the repulsive force is reduced, so that the repulsive force does not become too large.

また、ガスケットの一部が幅狭空間部に圧入されることにより、ガスケットが装着溝内で倒れるのが防止される。   In addition, the gasket is prevented from falling in the mounting groove by press-fitting a part of the gasket into the narrow space portion.

幅狭空間部の形状としては、絞り部側から溝底部側へかけて溝幅寸法を一定に設定するが、これに限らず、絞り部から溝底部へかけて溝幅寸法を漸次狭く設定しても良い（請求項２，３）。   As the shape of the narrow space part, the groove width dimension is set to be constant from the throttle part side to the groove bottom part side, but not limited to this, the groove width dimension is set to gradually narrow from the throttle part to the groove bottom part. (Claims 2 and 3).

本発明においては、２部材間のクリアランスが比較的大きくてガスケットが低圧縮の状態に置かれるときと、２部材間のクリアランスが比較的小さくてガスケットが高圧縮の状態に置かれるときとで、ガスケットの装着状態が異なることになるので、ガスケットの断面形状を縦長形状としなくてもシール組み付け部のクリアランスの変化に対応することができる。また、ガスケットの一部が幅狭空間部に圧入されるため、ガスケットの側面に倒れ防止用の突起を設けなくてもガスケットが装着溝内で倒れるのを防止することができる。   In the present invention, when the clearance between the two members is relatively large and the gasket is placed in a low compression state, and when the clearance between the two members is relatively small and the gasket is placed in a high compression state, Since the mounting state of the gasket is different, it is possible to cope with a change in the clearance of the seal assembling portion even if the sectional shape of the gasket is not a vertically long shape. In addition, since a part of the gasket is press-fitted into the narrow space portion, it is possible to prevent the gasket from falling in the mounting groove without providing a protrusion for preventing the collapse on the side surface of the gasket.

本発明の第１実施例に係る密封装置を示す図で、（Ａ）はガスケット低圧縮時の状態を示す断面図、（Ｂ）はガスケット高圧縮時の状態を示す断面図BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the sealing device based on 1st Example of this invention, (A) is sectional drawing which shows the state at the time of gasket low compression, (B) is sectional drawing which shows the state at the time of gasket high compression 本発明の第２実施例に係る密封装置を示す図で、（Ａ）はガスケット低圧縮時の状態を示す断面図、（Ｂ）はガスケット高圧縮時の状態を示す断面図It is a figure which shows the sealing device based on 2nd Example of this invention, (A) is sectional drawing which shows the state at the time of gasket low compression, (B) is sectional drawing which shows the state at the time of gasket high compression 本発明の第３実施例に係る密封装置を示す図で、（Ａ）はガスケット低圧縮時の状態を示す断面図、（Ｂ）はガスケット高圧縮時の状態を示す断面図It is a figure which shows the sealing device which concerns on 3rd Example of this invention, (A) is sectional drawing which shows the state at the time of gasket low compression, (B) is sectional drawing which shows the state at the time of gasket high compression 本発明の第４実施例に係る密封装置を示す図で、（Ａ）はガスケット低圧縮時の状態を示す断面図、（Ｂ）はガスケット高圧縮時の状態を示す断面図It is a figure which shows the sealing device which concerns on 4th Example of this invention, (A) is sectional drawing which shows the state at the time of gasket low compression, (B) is sectional drawing which shows the state at the time of gasket high compression （Ａ）および（Ｂ）とも従来例に係る密封装置の断面図(A) And (B) is sectional drawing of the sealing device which concerns on a prior art example 他の従来例に係る密封装置の断面図Sectional drawing of the sealing device which concerns on another prior art example

つぎに本発明の実施例を図面にしたがって説明する。   Next, embodiments of the present invention will be described with reference to the drawings.

第１実施例・・・・
図１は、本発明の実施例に係る密封装置１を示している。当該実施例に係る密封装置１は、互いに対向する２部材１１，２１のうちの一方の部材１１の対向面１２に設けた装着溝１３にガスケット３１を装着し、このガスケット３１が他方の部材２１の対向面２２に密接することにより２部材１１，２１間をシールするものであって、装着溝１３およびガスケット３１が以下のように構成されている。一方の部材１１は例えば、燃料電池スタックを構成するセパレータであり、他方の部材２１は例えば、セパレータと組み合わされるＭＥＡ（膜電極複合体）やＧＤＬ（ガス拡散層）などである。 First embodiment ...
FIG. 1 shows a sealing device 1 according to an embodiment of the present invention. In the sealing device 1 according to this embodiment, the gasket 31 is mounted in the mounting groove 13 provided on the facing surface 12 of one member 11 of the two members 11 and 21 facing each other, and this gasket 31 is the other member 21. The two members 11 and 21 are sealed by being in close contact with the facing surface 22 of the first and second mounting grooves 13 and the gasket 31 are configured as follows. One member 11 is, for example, a separator constituting a fuel cell stack, and the other member 21 is, for example, MEA (membrane electrode assembly) or GDL (gas diffusion layer) combined with the separator.

装着溝１３は、溝開口部１３ａを有し、この溝開口部１３ａに連続してその溝底部１３ｂ側に、テーパー形状１５を備える絞り部１４が設けられている。テーパー形状１５は装着溝１３の両溝側面部１３ｃに対称的に設けられている。テーパー形状１５におけるテーパーの向きは、溝開口部１３ａ側から溝底部１３ｂ側へかけて溝幅寸法が徐々に狭くなる向きとされている。   The mounting groove 13 has a groove opening 13a, and a throttle part 14 having a tapered shape 15 is provided on the groove bottom 13b side of the groove opening 13a. The tapered shape 15 is provided symmetrically on both groove side surfaces 13 c of the mounting groove 13. The taper direction of the taper shape 15 is such that the groove width dimension gradually decreases from the groove opening 13a side to the groove bottom 13b side.

また、上記絞り部１４のテーパー形状１５に連続してその溝底部１３ｂ側に、溝開口部１３ａよりも溝幅寸法が小さな幅狭空間部１６が設けられている。幅狭空間部１６は、テーパー形状１５側から溝底部１３ｂ側へかけて溝幅寸法ｗ３が一定に設定され、ストレート形状とされている。 Further, a narrow space portion 16 having a groove width smaller than that of the groove opening portion 13a is provided on the groove bottom portion 13b side continuously from the tapered shape 15 of the throttle portion. The narrow space portion 16 has a straight groove shape with a groove width dimension w 3 set to be constant from the tapered shape 15 side to the groove bottom portion 13b side.

一方、ガスケット３１は、ゴム状弾性体によって断面略円形状に成形されている。ガスケットの幅寸法ｗ４は、溝開口部の溝幅寸法ｗ５すなわち絞り部１４の最大溝幅寸法より小さく、かつ絞り部１４の最小溝幅寸法すなわち幅狭空間部１６の溝幅寸法ｗ３より大きく設定されている。 On the other hand, the gasket 31 is formed in a substantially circular cross section by a rubber-like elastic body. Width of the gasket w 4, the groove width of the groove opening w 5 i.e. narrowed portion smaller than the maximum groove width of 14, and the diaphragm portion 14 the groove width w 3 of the minimum groove width dimension or narrow space 16 of the It is set larger.

図１（Ａ）は、２部材１１，２１間のクリアランスｃが比較的大きく、よってガスケット３１が低圧縮の状態に置かれたときを示している。この低圧縮の状態で、ガスケット３１は２部材１１，２１の組み付け荷重によって絞り部１４のテーパー形状１５に押し付けられる。したがってこのようにガスケット３１が絞り部のテーパー形状１５に押し付けられことにより、シール面圧が発生するので、ガスケット３１および一方の部材１１間がシールされ、良好なシール性が確保される。   FIG. 1A shows a case where the clearance c between the two members 11 and 21 is relatively large, and thus the gasket 31 is placed in a low compression state. In this low compression state, the gasket 31 is pressed against the tapered shape 15 of the throttle portion 14 by the assembly load of the two members 11 and 21. Therefore, since the gasket 31 is pressed against the tapered shape 15 of the throttle portion in this way, a seal surface pressure is generated, so that the gasket 31 and the one member 11 are sealed, and a good sealing property is secured.

図１（Ｂ）は、２部材１１，２１間のクリアランスが比較的小さく（図面では、ほぼ零である）、よってガスケット３１が高圧縮の状態に置かれたときを示している。この高圧縮の状態では、２部材１１，２１の組み付け荷重が大きくなることにより、ガスケット３１の溝底部１３ｂ側の一部が幅狭空間部１６に圧入される。したがってこのようにガスケット３１の一部が幅狭空間部１６に圧入されることにより、ガスケット反発力が低減されるので、反発力が大きくなり過ぎることがなく、よって良好なシール性が持続する。   FIG. 1B shows a case where the clearance between the two members 11 and 21 is relatively small (in the drawing, it is almost zero), so that the gasket 31 is placed in a highly compressed state. In this high compression state, the assembly load of the two members 11 and 21 is increased, so that a part of the gasket 31 on the groove bottom portion 13 b side is pressed into the narrow space portion 16. Therefore, since a part of the gasket 31 is press-fitted into the narrow space portion 16 in this manner, the gasket repulsive force is reduced, so that the repulsive force does not become too large, and thus good sealing performance is maintained.

ガスケット３１は、断面略円形状とされ、低圧縮の状態（図１（Ａ））において幅方向両側で絞り部１４のテーパー形状１５に着座するよう押し付けられ、高圧縮の状態（図１（Ｂ））の状態において一部が幅狭空間部１６に圧入されるため、装着溝１３内で倒れることがない。   The gasket 31 has a substantially circular cross section and is pressed so as to be seated on the tapered shape 15 of the narrowed portion 14 on both sides in the width direction in a low compression state (FIG. 1A). In the state of)), a part thereof is press-fitted into the narrow space portion 16, so that it does not fall down in the mounting groove 13.

また、上記したように高圧縮の状態で、ガスケット３１の一部が幅狭空間部１６に圧入されるため、装着溝１３に対するガスケット３１の充填率についても、充填率過多となることがない。   Further, as described above, a part of the gasket 31 is press-fitted into the narrow space portion 16 in a highly compressed state, so that the filling rate of the gasket 31 with respect to the mounting groove 13 does not become excessive.

装着溝１３およびガスケット３１は、以下のような構成であっても良い。   The mounting groove 13 and the gasket 31 may have the following configurations.

第２実施例・・・・
図２に示す例では、ガスケット３１の幅寸法ｗ４が、溝開口部の溝幅寸法ｗ５すなわち絞り部１４の最大溝幅寸法より大きく設定され、そのうえで、絞り部１４の最小溝幅寸法すなわち幅狭空間部１６の溝幅寸法ｗ３より大きく設定されている。また、ガスケット３１の断面形状が断面真円形状とされている。 Second embodiment ...
In the example shown in FIG. 2, the width dimension w 4 of the gasket 31 is set larger than the groove width dimension w 5 of the groove opening, that is, the maximum groove width dimension of the throttle section 14, and then the minimum groove width dimension of the throttle section 14, It is set larger than the groove width dimension w 3 of the narrow space portion 16. Further, the cross-sectional shape of the gasket 31 is a perfect cross-sectional shape.

第３実施例・・・・
図３に示す例では、ガスケット３１の幅寸法ｗ４が、溝開口部の溝幅寸法ｗ５すなわち絞り部１４の最大溝幅寸法と同等に設定され、そのうえで、絞り部１４の最小溝幅寸法すなわち幅狭空間部１６の溝幅寸法ｗ３より大きく設定されている。また、ガスケット３１の断面形状が、一方の部材１１側の断面長方形状の台座状部位３２に他方の部材２１側の断面台形状のリップ状部位３３を組み合わせた断面多角形状（六角形状）とされている。 Third embodiment ...
In the example illustrated in FIG. 3, the width dimension w 4 of the gasket 31 is set to be equal to the groove width dimension w 5 of the groove opening, that is, the maximum groove width dimension of the throttle section 14, and then the minimum groove width dimension of the throttle section 14. That is, it is set larger than the groove width dimension w 3 of the narrow space portion 16. The cross-sectional shape of the gasket 31 is a polygonal cross-sectional shape (hexagonal shape) in which a pedestal portion 32 having a rectangular cross section on one member 11 side and a lip-shaped portion 33 having a trapezoidal cross section on the other member 21 side are combined. ing.

第４実施例・・・・
図４に示す例では、ガスケット３１の幅寸法ｗ４が、溝開口部の溝幅寸法ｗ５すなわち絞り部１４の最大溝幅寸法と同等に設定され、そのうえで、絞り部１４の最小溝幅寸法ｗ３より大きく設定されている。また、ガスケット３１の断面形状が、一方の部材１１側の断面長方形状の台座状部位３２に他方の部材２１側の断面台形状のリップ状部位３３を組み合わせた断面多角形状（六角形状）とされている。また、溝底部１３ｂの溝幅寸法ｗ６が絞り部１４の最小溝幅寸法ｗ３よりより小さく設定され、これにより幅狭空間部１６が絞り部１４側から溝底部１３ｂ側へかけて溝幅寸法が漸次小さくなる先細状に設定されている。 Fourth embodiment ...
In the example illustrated in FIG. 4, the width dimension w 4 of the gasket 31 is set to be equal to the groove width dimension w 5 of the groove opening, that is, the maximum groove width dimension of the throttle section 14, and then the minimum groove width dimension of the throttle section 14. It is set to be larger than w 3. The cross-sectional shape of the gasket 31 is a polygonal cross-sectional shape (hexagonal shape) in which a pedestal portion 32 having a rectangular cross section on one member 11 side and a lip-shaped portion 33 having a trapezoidal cross section on the other member 21 side are combined. ing. The groove width w 6 of the groove bottom portion 13b is set smaller than than the minimum groove width w 3 of the throttle section 14, thereby over the narrow space 16 is squeezed portion 14 side to the groove bottom portion 13b side groove width The taper is set so that the dimension gradually decreases.

上記各実施例においても、第１実施例と同等の作用効果を発揮することができる。   In each of the above embodiments, the same operational effects as those of the first embodiment can be exhibited.

１ 密封装置
１１ 一方の部材
１２，２２ 対向面
１３ 装着溝
１３ａ 溝開口部
１３ｂ 溝底部
１３ｃ 溝側面部
１４ 絞り部
１５ テーパー形状
１６ 幅狭空間部
２１ 他方の部材
３１ ガスケット
３２ 台座状部位
３３ リップ状部位 DESCRIPTION OF SYMBOLS 1 Sealing device 11 One member 12,22 Opposite surface 13 Mounting groove 13a Groove opening part 13b Groove bottom part 13c Groove side part 14 Throttle part 15 Tapered shape 16 Narrow space part 21 Other member 31 Gasket 32 Base part 33 Lip shape Part

Claims (3)

互いに対向する２部材のうちの一方の部材に設けた装着溝に装着されるガスケットが他方の部材に密接することにより前記２部材間をシールする密封装置であって、
前記装着溝の内面における溝側面部にテーパー形状を備える絞り部を設けるとともに前記絞り部よりも溝底部側に幅狭空間部を設け、
前記ガスケットの幅寸法を前記絞り部の最小溝幅寸法よりも大きく設定し、
前記ガスケットは、前記２部材間のクリアランスが大きく前記ガスケットが低圧縮の状態に置かれるときと、前記２部材間のクリアランスが小さく前記ガスケットが高圧縮の状態に置かれるときとで前記ガスケットの装着状態を異にするよう設定され、
前記２部材間のクリアランスが大きく前記ガスケットが低圧縮の状態に置かれるとき、前記ガスケットは前記２部材の組み付け荷重によって前記絞り部のテーパー形状に押し付けられることによりシール面圧を発生し、このとき前記ガスケットは前記幅狭空間部に圧入されず、
前記２部材間のクリアランスが小さく前記ガスケットが高圧縮の状態に置かれるとき、前記ガスケットはその一部が前記幅狭空間部に圧入されることを特徴とする密封装置。 A sealing device that seals between the two members by bringing a gasket mounted in a mounting groove provided in one of the two members facing each other into close contact with the other member,
Providing a narrowed portion having a tapered shape on the groove side surface on the inner surface of the mounting groove and providing a narrow space on the groove bottom side of the narrowed portion;
The width dimension of the gasket is set larger than the minimum groove width dimension of the throttle part,
The gasket is mounted when the gasket has a large clearance between the two members and the gasket is placed in a low compression state, and when the gasket has a small clearance between the two members and the gasket is placed in a high compression state. Set to a different state,
When the clearance between the two members is large and the gasket is placed in a low-compression state, the gasket is pressed against the tapered shape of the throttle portion by the assembly load of the two members, thereby generating a seal surface pressure. The gasket is not press-fitted into the narrow space part,
When the gasket is placed in a highly compressed state with a small clearance between the two members, a part of the gasket is press-fitted into the narrow space portion. 請求項１記載の密封装置において、
前記幅狭空間部は、前記絞り部側から溝底部側へかけて溝幅寸法が一定に設定されていることを特徴とする密封装置。 The sealing device according to claim 1.
The sealing device according to claim 1, wherein the narrow space portion is set to have a constant groove width dimension from the narrowed portion side to the groove bottom side. 請求項１記載の密封装置において、
前記幅狭空間部は、前記絞り部側から溝底部側へかけて溝幅寸法が漸次小さく設定されていることを特徴とする密封装置。 The sealing device according to claim 1.
The narrow space portion has a groove width dimension set gradually smaller from the throttle portion side to the groove bottom portion side.
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