JP2007255671A - Gasket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gasket which can show a stable sealing performance, and also can reduce a resilient force in mounting it. <P>SOLUTION: The gasket 1 is mounted in a mounting groove 201 provided on one member 200 among two members 200, 300, and also seals the gap between the two members 200, 300 by being compressed by means of the two members 200, 300. In this case, the portion of the gasket 1 on the high-pressure side (H) is formed so as to be furthermore easily compressed than the portion on the low-pressure side (L). A side surface 13 is tilted so that the central portion of the gasket body is bent so as to project toward the low-pressure side (L) when the gasket is compressed by means of the two members 200, 300. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gasket that is compressed by two members to seal a gap between the two members.

  A gasket according to this type of conventional example will be described with reference to FIGS. FIG. 7 is a schematic cross-sectional view showing a state before the gasket according to the conventional example is mounted. FIG. 8 is a schematic cross-sectional view showing a state when the gasket according to the conventional example is mounted. FIG. 9 is a schematic plan view of a gasket according to a conventional example.

  The gasket 100 is used, for example, for an inlet manifold of an automobile engine, a filter blanket, a cylinder head cover, and the like, and is used to seal a gap between two members (the first member 150 and the second member 160). It is done. The gasket 100 is mounted in a mounting groove 151 provided in the first member 150. And the gasket 100 is compressed by the 1st member 150 and the 2nd member 160, and the upper end part 101 and the lower end part 102 closely_contact | adhere to each member surface. Thereby, the clearance gap between two members can be sealed.

  As shown in FIG. 8, the gasket 100 constructed in this manner has a substantially vertically long cross-sectional shape whose dimension in the height direction is longer than that in the width direction and is compressed by two members at the time of mounting. Curvature deformation occurs near the center of the trunk. As shown in FIG. 9, the planar shape of the gasket 100 is formed in an annular shape in which the straight portion S and the corner portion C are mixed. Therefore, in a gasket whose cross-sectional shape is symmetrical, the outer side (low pressure side (L)) The convex corner part C tends to bend outward (curvature so that the center of the body part protrudes outward), but in the straight line part S, the direction of deformation is not determined and the outward curve A portion to be deformed and a portion to be bent and deformed inward (high pressure side (H)) (curved so that the vicinity of the center of the body portion protrudes inward) coexist, and a twist occurs at a portion where the deformation direction is reversed. Since the gasket 100 does not sufficiently adhere to the first member 150 and the second member 160 at a place where such twisting occurs, the sealing function is not sufficiently exhibited.

  In recent years, engine members have been made of resin or aluminum for the purpose of weight reduction, and the rigidity of engine members has been reduced accordingly. A low one is required.

For example, Patent Document 1 and Patent Document 5 disclose a gasket in which protrusions are provided on the side surfaces to prevent inclination, refraction, curvature, etc., but the sealing performance is prevented by preventing the inclination, refraction, curvature, etc. of the gasket. Although it can be increased, the compression rate of the gasket at the time of mounting increases, so that the repulsive force of the gasket generated at the time of mounting becomes large.
Japanese Patent No. 3310547 Japanese Patent Laid-Open No. 10-184924 JP 2002-21635 A Japanese Patent Laid-Open No. 2002-71024 JP 2003-269613 A

The present invention has been made in order to solve the above-described problems of the prior art, and an object of the present invention is to provide a gasket that can exhibit stable sealing performance and reduce repulsive force during mounting. There is.

In order to achieve the above object, the gasket of the present invention comprises:
In the gasket that is mounted in the mounting groove provided in one of the two members and is compressed by the two members to seal the gap between the two members,
When the high pressure side of the gasket is compressed more easily than the low pressure side, and the two parts are compressed, the side surface is inclined to bend and deform so that the center of the fuselage protrudes toward the low pressure side region. It is characterized by.

  According to the configuration of the present invention, the gasket is curved and deformed so that the vicinity of the center of the body protrudes toward the low pressure side region. Accordingly, since the gasket bending direction does not vary, it is possible to prevent the gasket from being twisted. Further, since the high pressure side of the gasket is easily compressed, the repulsive force of the gasket at the time of mounting is reduced.

  The side surface may be a side surface on the high pressure side and may be inclined so that the width between the side surface on the low pressure side becomes narrower as it approaches the groove bottom of the mounting groove.

  By inclining the side surface on the high pressure side in this way, the high pressure side of the gasket can be easily compressed with respect to the compression of the two members, and the gasket can be curved and deformed so that the vicinity of the fuselage center protrudes toward the low pressure side region. it can.

Furthermore, the side surface on the low pressure side is also inclined so that the width between the side surface on the high pressure side becomes narrower as it approaches the groove bottom of the mounting groove,
The inclination of the side surface on the high pressure side may be larger than the inclination of the side surface on the low pressure side.

  By inclining the side surface on the low pressure side, the portion on the low pressure side of the gasket is also easily compressed, so that the repulsive force of the gasket at the time of mounting is further reduced. In addition, even if the low pressure side portion of the gasket is easily compressed, the high pressure side portion of the gasket is made larger than the low pressure side portion so that the high pressure side portion is inclined more than the low pressure side portion. It becomes relatively easy to compress, and it is possible to prevent the gasket from being bent and deformed in the opposite direction (that is, so that the vicinity of the center of the body protrudes toward the high pressure side).

  The side surface may be inclined at an angle of 1 ° to 5 ° with respect to a center line extending in the height direction of the gasket cross section.

  Here, the center line extending in the height direction of the gasket cross section refers to one end (the end on the groove bottom side of the mounting groove) and the other end (the other member side of the two members) in the gasket cross section. And a line passing through the center in the width direction of the gasket cross section.

The end of the other member side of the two members is
A flange that extends into the gap between the two members and expands the sealing surface with the other member;
When the gasket is curved and deformed so that the vicinity of the center of the body protrudes toward the region on the low pressure side, the structure may be in close contact with the other member in a planar shape.

  In addition, said each structure can be employ | adopted combining as much as possible.

As described above, according to the present invention, stable sealing performance can be exhibited, and the repulsive force at the time of mounting is reduced.

  The best mode for carrying out the present invention will be exemplarily described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. .

Example 1
With reference to FIGS. 1-4, the gasket which concerns on Example 1 of this invention is demonstrated. FIG. 1 is a schematic plan view of a gasket according to the present embodiment. FIG. 2 is a schematic cross-sectional view of the gasket according to the present embodiment, and is a cross-sectional view taken along AA in FIG. FIG. 3 is a schematic cross-sectional view illustrating a state when the gasket according to the present embodiment is mounted (before compression). FIG. 4 is a schematic cross-sectional view showing a state when the gasket according to the present embodiment is mounted (at the time of compression).

<Composition and outline of gasket>
As shown in FIG. 1, the gasket 1 according to the present embodiment is an annular member in which a straight portion S and a corner portion C are mixed in a planar shape. For example, as shown in FIG. 2, the cross-sectional shape has a longer dimension in the height direction than in the width direction. In addition, as a material of the gasket 1, rubber materials, such as acrylic rubber of the rubber hardness (durometer A: JISK6253) 40-70, nitrile rubber, a fluorine rubber, thermoplastic elastomer, etc. can be used, for example.

  Here, in the gasket 1, both end portions in the height direction (hereinafter referred to as the first end portion 11 and the second end portion 12, respectively) are portions that form seal surfaces. In this embodiment, in order to improve the sealing performance, the first end portion 11 and the second end portion 12 are formed with annular seal protrusions 11a and 12a, respectively.

  Further, both sides of the first end portion 11 protrude in a flange shape on the high pressure side (H) and the low pressure side (L) (flange portion 11b), and the sealing surface by the first end portion 11 is the second end portion. 12 is enlarged to the high pressure side (H) and the low pressure side (L).

  Further, the first end portion 11 is formed with seal projections 11c on the inner side and the outer side of the seal projections 11a (in the cross section, they are formed substantially symmetrically with respect to the seal projections 11a). The seal protrusion 11c has a height smaller than that of the seal protrusion 11a, and is disposed on the seal surface enlarged by the flange portion 11b.

  In the present embodiment, the side surface 13 (corresponding to the inner surface here) on the high pressure side (H) of the gasket 1 is inclined by an angle α with respect to the center line T0, and the high pressure side (H) The width of the gasket 1 (the width between the side surface 13 and the center line T0) becomes narrower from the first end portion 11 toward the second end portion 12.

  On the other hand, the side surface 14 extends substantially parallel to the center line T0. Therefore, the width of the gasket 1 on the high pressure side (H) increases from the width of the gasket 1 on the low pressure side (L) (between the side surface 14 and the center line T0) as it approaches the second end portion 12 from the first end portion 11. It is narrower than (width). In other words, the cross-sectional shape of the gasket 1 has a tapered shape in which the width between the side surface 13 and the side surface 14 becomes narrower from the first end portion 11 toward the second end portion 12.

The center line T0 is a center line extending in the height direction of the cross section of the gasket 1, that is, a line passing through the first end portion 11 and the second end portion 12 in the cross section of the gasket 1,
It is a line which passes along the center of the width direction in the cross section.

  Further, the side surface 13 is inclined over the entire side surface of the gasket 1, and the side surfaces 13 and 14 are surfaces that extend linearly from the first end portion 11 to the second end portion 12 in the cross section of the gasket 1.

  The gasket 1 configured as described above is used to seal a gap between two members (hereinafter referred to as a first member 200 and a second member 300). That is, the gasket 1 is mounted in the mounting groove 201 provided in the first member 200.

  The gasket 1 is compressed by the first member 200 and the second member 300, whereby the first end portion 11 (seal protrusions 11 a and 11 b) is in close contact with the surface of the second member 300, and the second end portion 12. The (seal protrusion 12a) is in close contact with the groove bottom surface of the mounting groove 201 provided in the first member 200. Thereby, the clearance gap between two members can be sealed.

  In addition, as a use application of the gasket 1 which concerns on a present Example, the use for the inlet manifold of an automobile engine, the filter blanket, the cylinder head cover etc. can be considered, but it cannot be overemphasized that it is not restricted to these uses.

<When gasket is installed (before compression)>
First, the gasket 1 is mounted in a mounting groove 201 provided in the first member 200 as shown in FIG. Here, in a state before being compressed by the first member 200 and the second member 300, the gasket 1 is in a straight state in the mounting groove 201. Further, the center line T0 is perpendicular to the groove bottom surface and is not curved in a state before being compressed by the first member 200 and the second member 300.

  Here, the seal protrusions 11a and 12a are formed on the center line T0 with respect to the first end portion 11 and the second end portion 12, respectively. Further, the flange portion 11b of the first end portion 11 protruding to the high-pressure side (H) and the low-pressure side (L) respectively has a length between the tips thereof larger than the width dimension of the mounting groove 201. It is configured.

<When gasket is installed (compressed)>
Next, when the second member 300 is attached to the first member 200, the gasket 1 is compressed by the first member 200 and the second member 300 as shown in FIG. In addition, the arrow P in the drawing indicates the direction of the compressive force applied by the second member 300.

  Here, in the gasket 1 according to the present embodiment, the side surface 13 (inner side surface) on the high pressure side (H) is inclined, and the width of the portion on the high pressure side (H) ( The width between the side surface 13 and the center line T1) is narrower than the width of the low pressure side (L) portion (the width between the side surface 14 and the center line T1).

  Therefore, when the gasket 1 is compressed by the first member 200 and the second member 300, the high pressure side (H) portion of the gasket 1 is compressed more easily than the low pressure side (L) portion, and the vicinity of the center of the fuselage is compressed. It is curved and deformed so as to protrude toward the low pressure side (L). Since the side surface 13 is inclined over the entire side surface of the gasket 1, the entire gasket 1 is curved and deformed as described above.

Further, as shown in FIG. 4, the center line T1 in the width direction of the gasket 1 during compression is curved. And the both ends (the 1st end part 11 and the 2nd end part 12) which form a sealing surface are inclined in the 2nd end part 12 toward the high voltage | pressure side (H), and a 1st end part is 2nd. It faces the surface of the member 300 substantially in parallel.

  As for the 1st end part 11 closely_contact | adhered to the 2nd member 300, a seal surface is expanded in the width direction by the flange part 11b which each protrudes in a high voltage | pressure side (H) and a low voltage | pressure side (L). Then, the seal protrusion 11b formed on the enlarged portion contacts the second member 300 on the inside and outside of the seal protrusion 11a. That is, in the initial stage of compression by the first member 200 and the second member 300, the first end portion 11 contacts the second member 300 at three points by the seal projection 11a and the seal projections 11b on both sides in the cross section. After that, it comes into close contact with the second member 300 in a substantially planar shape.

  On the other hand, in the initial stage of compression by the first member 200 and the second member 300, the second end portion 12 that is in close contact with the groove bottom surface of the mounting groove 201 is mounted at one point only by the seal protrusion 12a formed on the center line. It is configured to contact the groove bottom surface of the groove 201, and the gasket 1 is curved and deformed due to the compression of the first member 200 and the second member 300, so that the groove 201 is in close contact with the groove bottom surface of the mounting groove 201. .

  Further, when the gasket 1 is curved and deformed by the compression of the first member 200 and the second member 300, the low-pressure side (L) side surface 14 comes into contact with the side surface 201 a of the mounting groove 201.

  FIG. 4 shows the gasket 1 with respect to the dimension in the height direction from the groove bottom of the mounting groove 201 to the surface of the second member 300 when the first member 200 and the second member 300 are attached. This is a case where the interference of the dimension in the height direction is small. Therefore, when the interference is increased, the gasket 1 is refracted near the center of the body, and the flange portion of the first end portion 11 extends into the gap between the first member 200 and the second member 300. 11b is sandwiched between the surface of the first member 200 and the surface of the second member 300 outside the mounting groove 201 and is in close contact with each other.

<Excellent point of gasket according to this example>
According to the gasket 1 according to the present embodiment, the high pressure side (H) side portion 13 is inclined, so that the high pressure side (H) portion of the gasket 1 is more easily compressed than the low pressure side (L) portion. Therefore, when the gasket 1 is compressed by the first member 200 and the second member 300, the gasket 1 is curved and deformed so that the vicinity of the center of the trunk projects toward the low pressure side (L). Therefore, the gasket 1 does not vary in the bending direction, and thus it is possible to prevent the gasket 1 from being twisted.

  In addition, since the side surface 13 on the high-pressure side (H) is inclined, the gasket 1 is likely to be deformed with respect to the compression by the first member 200 and the second member 300. Therefore, the repulsive force of the gasket 1 against the compression is increased. Reduced.

  Further, the degree of inclination of the side surface 13 can be appropriately set according to the specifications of the gasket, the mounting groove, etc., but the angle α is within the range of 1 to 5 ° with respect to the center line T0 of the gasket 1. Is preferred. That is, when the angle is less than 1 °, the effect of reducing the repulsive force against compression by the first member 200 and the second member 300 is small, and when the angle exceeds 5 °, it becomes difficult to form a vertically long cross-sectional shape of the gasket. .

Further, the seal protrusion 11c is formed to be lower than the seal protrusion 11a, and the seal protrusion 11a abuts against the second member 300 on both sides of the seal protrusion 11a, thereby making the seal protrusion 11a perpendicular to the surface of the second member 300. Act to maintain. Further, since the seal protrusion 11a is formed to be higher than the seal protrusions 11b on both sides, the seal protrusion 11a is compressed more than the seal protrusion 11b, and at one point of the seal protrusion 11a. Surface pressure is increased. Thereby, the stable sealing performance with respect to the 2nd member 300 of the 1st end part 11 can be acquired.

  Further, the second end portion 12 is configured to be in close contact with the seal protrusion 12a at one point, and the surface pressure with respect to the mounting groove 201 is increased, so that the sealing performance is improved. Note that the second end portion 12 is inclined and in close contact with the groove bottom of the mounting groove 201, but is inclined to the high pressure side (H), so that a decrease in sealing performance is suppressed.

  In the present embodiment, the case where the planar shape of the gasket 1 is a non-circular shape in which straight portions and corner portions are mixed has been described as an example. However, the circular shape is not excluded from the shape of the gasket according to the present invention. Absent.

  Further, in the present embodiment, the side surface 13 is inclined over the entire side surface of the gasket 1, but a configuration in which a part of the side surface is inclined may be employed. That is, it is possible to incline only the side surface of the portion that may be bent in the direction opposite to the desired bending direction. In this embodiment, only the side surface of the straight line portion S in the gasket plan view of FIG. The structure which makes it incline may be sufficient.

  Furthermore, in the present embodiment, the side surface 13 is configured as one inclined surface that is inclined over the entire width in the height direction of the gasket 1. For example, the side surface 13 is inclined from the middle in the depth direction of the mounting groove. There may be. That is, it may be a side surface composed of two types of surfaces, a surface extending parallel to the center line T0 and a surface extending inclined with respect to the center line T0, and has a directivity in the curved deformation of the gasket 1. The side surface 13 may be formed from a plurality of types of surfaces as long as it can be applied.

  In the present embodiment, the side surfaces 13 and 14 are surfaces that extend linearly in the cross section of the gasket 1, but are not limited to such a surface shape. That is, as long as the curved deformation of the gasket 1 can be given directionality, for example, a curved surface extending between the first end portion 11 and the second end portion 12 can also be formed. Furthermore, it is also possible to make each of the surfaces have different shapes.

(Example 2)
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a schematic cross-sectional view of the gasket according to the present embodiment. Here, only differences from the first embodiment will be described, and the description of the configuration common to the first embodiment will be omitted.

  In the first embodiment, only the high pressure side (H) side surface 13 is inclined, but in this embodiment, the low pressure side (L) side surface 14 is also inclined. That is, in this embodiment, the side surface 14 of the gasket 1 is inclined by an angle β with respect to the center line T0, and the width of the gasket 1 on the low pressure side (L) (the width between the side surface 14 and the center line T0). Is also narrower as it approaches the second end 12. Therefore, the gasket 1 according to the present embodiment has a cross-sectional shape that is further tapered than the gasket of the first embodiment.

  However, the degree of inclination of the side surfaces 13 and 14 is set so that the side surface 13 on the high pressure side (H) is larger than the side surface 14 on the low pressure side (L) (that is, α> β). Therefore, the width of the gasket 1 on the high-pressure side (H) (the width between the side surface 13 and the center line T0) is the width of the gasket 1 on the low-pressure side (L) (the center between the side surface 14 and the center). It is relatively narrower than the width between the line T0.

In this manner, since the low pressure side (L) side surface 14 is also inclined, the low pressure side (L) portion of the gasket 1 is also easily compressed, so that only the high pressure side (H) side surface 13 is inclined. The repulsive force of the gasket 1 at the time of mounting is further reduced than 1.

  Further, by making the inclination angle α of the side surface 13 on the high pressure side (H) larger than the inclination angle β of the side surface 14 on the low pressure side (L), the gasket 1 has a portion on the high pressure side (H) on the low pressure side ( It becomes relatively easier to compress than part L).

  That is, in this embodiment, the side surface 14 is also inclined so that the low pressure side (L) portion of the gasket 1 is easily compressed against the compression by the first member 200 and the second member 300, but the high pressure side ( By making H easier to be compressed, it is possible to prevent the gasket 1 from undergoing a curved deformation in the opposite direction (that is, so that the vicinity of the center of the body protrudes toward the high pressure side (H)).

  As in the first embodiment, in this embodiment, the inclinations of the side surfaces 13 and 14 are preferably such that the angles α and β are within the range of 1 to 5 ° with respect to the center line T0 of the gasket 1. Needless to say, the relationship of α> β must be maintained.

<Comparison between Examples and Comparative Examples>
Here, the stability and low resilience of the sealing performance of the gasket according to each embodiment of the present invention will be described with reference to FIG. FIG. 6 is a table showing the results of a comparative experiment using a comparative example in which the configuration such as the inclination of the side surface is different from the gasket of each example of the present invention.

  The gasket used in the experiment is made of a rubber material having a rubber hardness of 60, the gasket height is 8.9 mm, the inside (high pressure side) inclination angle α is 0, 1.3, 2.5 °, and the outside (low pressure). Side) It has a cross-sectional shape composed of respective combinations of inclination angles β of 0, 1.3, and 2.5 °. This gasket was attached to a member having a groove having a depth of 5 mm and a width of 3 mm, and compressed by 3.1 mm with a member having a flat surface. The presence or absence of reversal of the deformation direction, the repulsive force, and the surface pressure obtained as a result are shown in the table of FIG.

  First, regarding the gasket according to Example 1 of the present invention, No. 1 to 4 and 7 will be described in comparison. The gasket according to Example 1 is a gasket in which the side surface on the high pressure side is inclined. 4 and 7 correspond.

  No. No. 1 is a gasket in which neither side is inclined. 2 to 4 and 7 are gaskets whose one side surface is inclined. As shown in the table, it is understood that the repulsive force of the gasket is reduced by inclining the side surface (3.4 → 2.3 to 2.6). No. 2 and No. 3 and no. 4 and no. 7 is compared with each other, it is understood that the repulsive force of the gasket is further reduced as the inclination angle is increased (2.6 (No. 2) → 2.5 (No. 3), 2.6 (No. 4). → 2.4 (No. 7)).

  In addition, No. in which the side surface on the low pressure side is inclined. 2, 3 and No. with the side surface on the high pressure side inclined. 4 and 7 (Example 1), No. 1 in which the side surface on the high pressure side is inclined. 4 and 7, it can be seen that the deformation direction is not reversed and the occurrence of twisting is prevented.

  That is, No. with the side surface on the low pressure side inclined. In the case of 2 and 3, since the portion on the low pressure side of the gasket is easily compressed against the portion on the high pressure side, a curved deformation occurs near the center of the gasket body so as to protrude toward the high pressure side in the straight portion. It becomes like this. However, since the corner portion is easily bent and deformed so as to protrude toward the low pressure side, the deformation direction of the gasket is reversed between the straight portion and the corner portion.

  On the other hand, no. In the case of 4 and 7, since it becomes easy to bend and deform so that the vicinity of the center of the trunk protrudes toward the low pressure side in both the straight part and the corner part, reversal of the deformation direction of the gasket is suppressed.

  Next, with respect to the gasket according to Example 2 of the present invention, No. 1, 5, 6, 8, and 9 will be described in comparison. The gasket according to Example 2 is a gasket in which both side surfaces on the high pressure side and the low pressure side are inclined, and the inclination of the side surface on the high pressure side is larger than the inclination on the side surface on the low pressure side. 8 corresponds.

  As in the case of Example 1, no side surface is inclined. The repulsive force of the gasket is reduced by inclining the side surface of the gasket 1 (3.4 → 2.2 to 2.4), and the repulsive force of the gasket is further reduced as the inclination angle increases. (2.4 (No. 5) → 2.3 (No. 6, 8) → 2.2 (No. 9)).

  No. As for the gaskets 5 and 9, both the high-pressure side and the low-pressure side are both provided at the same inclination angle, and the cross section has an axisymmetric shape. Therefore, the deformation direction of the gasket at the time of mounting is not fixed, and the deformation direction is reversed to cause twisting.

  No. In the gasket No. 6, the inclination angle of the side surface on the low pressure side is set larger than the inclination angle of the side surface on the high pressure side, and the low pressure side portion is easily compressed relative to the high pressure side portion of the gasket. Therefore, when the gasket is attached, the bending deformation is likely to occur so that the vicinity of the center of the trunk protrudes toward the high pressure side. However, since the corner portion of the gasket is easily bent and deformed so that the vicinity of the center of the body protrudes toward the low pressure side, the deformation direction of the gasket is reversed between the straight portion and the corner portion.

  On the other hand, the inclination angle of the side surface on the high pressure side is set larger than the inclination angle of the side surface on the low pressure side. In the case of 8 (Embodiment 2), since it is easy to bend and deform so that the vicinity of the center of the trunk protrudes toward the low pressure side in both the straight portion and the corner portion, reversal of the deformation direction of the gasket is suppressed.

  Finally, no. 4, 7 (Example 1) and 8 (Example 2), No. 8 in which only the side surface on the high pressure side is inclined. No. 4 and 7 in which both the high pressure side and the low pressure side are inclined. In the case of No. 8, the repulsive force of the gasket at the time of mounting is reduced.

  From the above, when the side of the high pressure side (inner side) is tilted, and when the side of the low pressure side (outside) is also tilted, the tilt angle of the side surface of the high pressure side is increased to prevent the gasket from twisting. It can be seen that there is no inversion of deformation direction. It can also be seen that the repulsive force is further reduced by inclining both side surfaces (gasket of Example 2 (No. 8)). Moreover, the surface pressure of the gasket (No. 4, 7, 8) of this example is substantially equal to the surface pressure of the comparative example (No. 1-3, 5, 6, 9), and the magnitude of the inclination angle. It can also be seen that stable sealing performance is exhibited regardless of the above.

It is a schematic plan view of the gasket which concerns on Example 1 of this invention. It is typical sectional drawing of the gasket which concerns on Example 1 of this invention. It is typical sectional drawing which shows the state at the time of mounting | wearing with the gasket which concerns on Example 1 of this invention (before compression). It is typical sectional drawing which shows the state at the time of mounting | wearing (compression) of the gasket which concerns on Example 1 of this invention. It is typical sectional drawing of the gasket which concerns on Example 2 of this invention. It is a table | surface which shows the result of the comparative experiment of the gasket which concerns on the Example of this invention. It is typical sectional drawing which shows the state before mounting | wearing with the gasket which concerns on a prior art example. It is typical sectional drawing which shows the mode at the time of mounting | wearing in the gasket which concerns on a prior art example. It is a schematic plan view of the gasket which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gasket 11 1st edge part 11a Seal protrusion 11b Flange part 11c Seal protrusion 12 2nd end part 12a Seal protrusion 13 Side surface 14 Side surface 200 1st member 201 Mounting groove 201a Side surface 300 2nd member T0, T1 Center line

Claims (5)

In the gasket that is mounted in the mounting groove provided in one of the two members and is compressed by the two members to seal the gap between the two members,
When the high pressure side of the gasket is compressed more easily than the low pressure side, and the two parts are compressed, the side surface is inclined to bend and deform so that the center of the fuselage protrudes toward the low pressure side region. A gasket characterized by having   2. The gasket according to claim 1, wherein the side surface is a side surface on a high-pressure side, and is inclined so that a width between the side surface and the side surface on the low-pressure side becomes narrower as it approaches the groove bottom of the mounting groove. Furthermore, the side surface on the low pressure side is also inclined so that the width between the side surface on the high pressure side becomes narrower as it approaches the groove bottom of the mounting groove,
The gasket according to claim 2, wherein an inclination of the side surface on the high pressure side is larger than an inclination of the side surface on the low pressure side.   The gasket according to any one of claims 1 to 3, wherein an inclination angle of the side surface is not less than 1 ° and not more than 5 ° with respect to a center line extending in a height direction of the gasket cross section. The end of the other member side of the two members is
A flange portion that extends into the gap between the two members and expands the sealing surface with the other member;
The gasket according to any one of claims 1 to 4, wherein when the gasket is curved and deformed so that the vicinity of the center of the body protrudes toward a region on the low pressure side, the gasket closely adheres to the other member in a planar shape. .

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