JP2012255515A - Gasket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gasket fitted into an cutout recess and sealing the cutout recess, and capable of being fitted into the cutout recess without damaging a seal surface.SOLUTION: The gasket 4 fitted into the cutout recess 12 formed so as to communicate to an opening in one wall 11A of a box-like member 1 having the opening 10 in at least one face and sealing the cutout recess has a rubber exterior part 6 formed so as to match with a shape of the cutout recess and having a seal surface 60 elastically contacting the cutout recess, a core body 5 having higher rigidity than the rubber exterior part and covered with the rubber exterior part, and further has pushing operating parts 52a, 61 constituted of a part of the or body capable of protruding in a thickness direction and pushing and pressing the rubber exterior part from the opening side in a pushing into direction to the cutout recess.

Description

  The present invention relates to a gasket that is fitted into a notch recess of a cylinder head for mounting a camshaft or a notch recess formed in one wall portion of a case that houses a power control unit, and seals the notch recess. .

A dedicated gasket for sealing the notch recess is used for the notch recess as described above formed in the cylinder head of the internal combustion engine (see, for example, Patent Document 1).
Recently, the demand for hybrid vehicles using an electric motor as an internal combustion engine for automobiles has increased, and such a hybrid engine has an electric power control unit such as an inverter, converter, or transformer for controlling the operation of the electric motor. Used. The power control unit described above is housed in a case. The case holds a refrigerant supply pipe and an electric wire for suppressing heat generation, and is fitted in a notch recess formed in the case wall. A plug member (hereinafter also referred to as a gasket) that seals the recess is used. In patent document 2, in order to ensure the waterproofness of the electric circuit accommodated in a case and an electrical component, an airtight container is used and waterproofing is provided in introduction parts, such as a cable for the connection with the exterior. A waterproof structure for such an electrical device is disclosed.

JP 2009-264666 A JP 2000-101265 A

  Patent Document 1 discloses a cylinder head gasket including an annular gasket body portion made of a molded rubber body and a plug portion formed integrally with the gasket body portion. The plug portion is fitted into a notch recess formed in the cylinder head, and the gasket main body portion is interposed between the cylinder head and the cylinder head cover to be joined together. In this case, when the plug portion is fitted into the notch recess, the gasket main body existing on the upper surface of the plug portion is pressed toward the notch recess. For this reason, when the sealing surface of the gasket main body is pressed by the gripping means of the assembling apparatus, or when the sealing surface of the gasket main body is pressed by a finger or a tool, the gasket main body may be damaged. When such a damage occurs, the sealing performance between the cylinder head and the cylinder head cover is lowered.

  Moreover, in the waterproof structure of the electric equipment shown in Patent Document 2, a notch is formed in the lower case constituting the hermetic container, and has a shape slightly larger than the shape of the notch and is introduced into the case. A bush formed integrally around the cable is pressed into the notch. In this case, the upper surface of the bush is added with a pressure input when being pressed into the notch, and constitutes a seal surface between the upper case and the waterproof packing. Although the material of the bush is not clearly described in Patent Document 2, the top surface of the bush serving as a seal surface by a finger, a press-fitting tool, or a gripping means of an assembling apparatus when applying pressure input. Is expected to be damaged, and this damage will affect the sealing performance between the upper case and the case.

  An object of the present invention is to provide a gasket that is fitted into a notch recess and seals the notch recess so that the gasket can be fitted into the notch recess without damaging the seal surface.

  A gasket according to the present invention is a gasket that is fitted into a notch recess formed to communicate with the opening in one wall portion of a box-shaped member having an opening on at least one surface, and seals the notch, A rubber exterior part formed so as to match the shape of the notch recess, and having a seal surface part elastically contacting the notch recess, and a core configured to have higher rigidity than the rubber exterior part and covered with the rubber exterior part And a pressing action part that is configured by a part of the core body and protrudes in the thickness direction and is capable of pressing the rubber exterior part into the notch recess from the opening side. Features.

  The gasket of this invention WHEREIN: The said press action part is good also as what is provided in the both sides on both sides of the said seal surface part in the thickness direction. In the gasket of the present invention, the core body is made of a metal material and includes a tongue piece formed by cutting and raising a part of the core, and the tongue piece is covered with the rubber exterior portion. You may make it have 1 press action part. In this case, it is desirable that the tongue piece is cut and raised so as to be substantially parallel to the pushing direction. Moreover, the tongue piece part is good also as what is bent so that the front side may cross | intersect the said thickness direction. In the gasket according to the present invention, the core includes a lateral wall portion formed so as to be aligned with the notch recess along the thickness direction, and a part of the lateral wall portion is extended in the thickness direction. It is good also as what has a 2nd press action part.

  The gasket of the present invention is fitted into a notch recess formed in one wall portion of a box-shaped member having an opening on at least one surface so as to communicate with the opening, and seals the notch recess. Further, since the rubber exterior portion is reinforced by the core body, the shape of the rubber exterior portion formed so as to match the shape of the notch recess is maintained. And since it has a pressing action part formed so as to protrude in the thickness direction and configured to be able to press the rubber exterior part in the direction of fitting into the notch recess from the opening side, pressing the pressing action part Thus, the rubber exterior part can be fitted. Moreover, since this pressing action part is constituted by a part of the core body having higher rigidity than the rubber exterior part, even if a strong pressing force is applied, the pressing force can be received without being deformed. Moreover, since the pressing action part protruding in the thickness direction is separately provided, there is no fear of damaging a part other than the pressing action part such as a seal part at the time of pressing.

Since the pressing action part is provided on both sides of the sealing surface part in the thickness direction, the pressing action part provided on both sides can be pressed simultaneously. Then, by simultaneously pressing the pressing action portions provided on both sides and fitting the rubber exterior portion into the notch recess, the entire seal surface portion can be easily brought into elastic contact with the notch recess.
The core body is made of a metal material, includes a tongue piece portion formed by cutting and raising a part of the core body, and has a first pressing action portion that is covered with a rubber exterior portion. Even if the pressing portion is constituted by a tongue piece that is a part of the body, the core is not exposed. Therefore, the tongue piece portion can be protected from moisture such as washing water by the rubber exterior portion, and the tongue piece portion can be prevented from being rusted.
When the tongue piece portion is cut and raised so as to be substantially parallel to the pushing direction, for example, compared to the tongue piece portion cut and raised so as to cross the pushing direction, the pressing action portion may be pressed. It is difficult to bend and can receive a larger pressing force.
In addition, when the tongue piece portion is bent so that the tip side intersects the thickness direction, the pressable portion is prevented from protruding excessively in the thickness direction, and the pressable region is expanded. it can.
The core includes a lateral wall portion formed so as to be aligned with the cutout recess along the thickness direction, and has a second pressing action portion in which a part of the lateral wall portion is extended in the thickness direction. If this is the case, the pressing action part can be composed of a part of the lateral wall part of the core extending in the thickness direction. Is simple.

1 is a schematic overall perspective view showing an embodiment of a gasket according to the present invention together with a first member to be sealed. It is the partially broken front view and partial enlarged view which show the state which fitted the gasket to the 1st member to be sealed. It is a perspective view which shows one Embodiment of the core used for the gasket. It is an expansion perspective view of the A section in FIG. FIG. 3 is a cross-sectional view taken along line B-B of the gasket in FIG. 2. It is the side view seen from the C line direction of the gasket in FIG. FIG. 3 is a cross-sectional view taken along line DD in the enlarged view of FIG. 2. It is the top view seen from the E line direction of the gasket in FIG. FIG. 3 is a view similar to the enlarged view of FIG. 2 in a use state in which the gasket is interposed between two members to be sealed.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic overall perspective view showing an embodiment of a gasket of the present invention together with a first member to be sealed, and FIG. 2 is a partially broken front view showing a state in which the gasket is fitted into the first member to be sealed. It is a figure and a partial enlarged view.
The first member 1 to be sealed may be a box-shaped member having an opening 10 on at least one surface. In FIGS. 1 and 2, the opening 10 is formed on one surface of a substantially rectangular parallelepiped made of a hexahedron (the upper surface in the illustrated example). And a box-shaped member having a bottom on the side opposite to the opening 10 with the peripheral wall 11 in between. And the upper end surface 11a of the surrounding wall part 11 surrounding the opening part 10 is made into the seal | sticker object part. That is, as described later, the second member 2 as another member to be sealed such as a cylinder head cover or a lid is combined with the upper end surface 11a via another annular gasket 3 (see FIGS. 5 and 7). The
One wall portion 11A of the peripheral wall portion 11 is U-shaped (notched from the opening 10 side, that is, from the upper end surface 11aa of the one wall portion 11A toward the depth direction of the box-shaped first member 1 ( A semi-oval or semi-elliptical cutout recess 12 is formed. The notch surface 12 a of the notch recess 12 is continuous with the upper end surface 11 a of the peripheral wall portion 11. Further, a chamfering process of a flat slope is performed on the opening side corner (a boundary portion between the notch surface 12a and the upper end surface 11a of the peripheral wall portion 11) 12b as a corner of the notch recess 12.

As shown in FIG. 5, the gasket 4 has a rubber exterior portion 6 having a seal surface portion 60 that elastically contacts the cutout recess 12, and is configured to have higher rigidity than the rubber exterior portion 6 and is covered with the rubber exterior portion 6. The core 5 is provided.
The rubber exterior portion 6 is made of a vulcanized molded body made of a rubber material such as FKM, NBR, H-NBR, EPDM, CR, ACM, AEM, VMQ, and FVMQ. Specifically, the core 5 formed in advance by sheet metal processing is placed in a mold having a cavity with a predetermined shape, and the unvulcanized rubber material is injected into the mold, By vulcanization, a molded body as shown in the figure integrated with the core body 5 is obtained. In the illustrated gasket 4, the outer surfaces of the longitudinal wall portion 50 and the first lateral wall portion 51 of the core body 5 are completely covered by the rubber exterior portion 6, and the outer shape of the rubber exterior portion 6 is the notch recess 12. It is formed to match. Further, the whole tongue pieces 53 and 53 are also completely covered in a state of being embedded in the rubber exterior portion 6. The portions where the rubber exterior portion 6 covers the tongue pieces 53 and 53 are formed as protrusions 61 and 61 as first pressing action portions that are symmetrical in series when viewed from the front. The protrusions 61, 61 are formed so as to protrude from the other portions of the rubber exterior portion 6 to the outer side in the thickness direction of the gasket 4 (core body 5). The surface portion of the rubber exterior portion 6 that covers the outer surface of the first lateral wall portion 51 is the seal surface portion 60, and a plurality of bead portions 60 a along the bending direction are substantially parallel to the seal surface portion 60. Raised (see FIGS. 1, 4 and 6). In addition, a thin rubber coating layer 62 is formed by a part of the rubber exterior portion 6 on the outer surface of the second lateral wall portion 52, and the second lateral wall portion 52 around the rubber coating layer 62 is formed. A part of the outer surface of is exposed. Of the second lateral wall portion 52, an extension portion 52a facing inward of the first member 1 protrudes inward in the thickness direction from the other portion of the core body 5, and this extension portion 52a is the second pressing portion. It is set as an action part (refer also to Drawing 7 and Drawing 8). In this way, if the extended portion 52a serving as the second pressing action portion is configured by a part of the lateral wall portion 52 of the core body 5 extended in the thickness direction, there is no need to separately perform cutting and raising processing, welding processing, or the like. Since it is good, manufacture of a 2nd press action part is easy.
Although three bead portions 60a are formed in the illustrated example, the number is not limited to this, and may be one, two, or four or more. Providing such a bead portion 60a is effective in terms of sealing properties, but it is not essential to provide it.

The core body 5 only needs to be configured to have higher rigidity than the rubber exterior portion 6, and may be formed, for example, by drawing a steel plate. The core body 5 has a shape corresponding to the shape of the notch recess 12, and when the core body 5 is formed of a steel plate, an iron-based steel plate, a stainless steel plate, or the like is employed. As shown in FIGS. 3 and 5, the core body 5 has a vertical wall portion 50 whose front shape is substantially similar to the shape of the notch recess 12 when viewed from the front (viewed from a direction orthogonal to the peripheral wall portion 11), The first and second lateral wall portions 51 and 52 are formed around the longitudinal wall portion 50 and face inward of the first member 1. It is made into a shape. The first and second lateral wall portions 51 and 52 are aligned with the notch recess 12 along the thickness direction of the gasket 4 (core body 5). The thickness direction of the gasket 4 (core body 5) is an arrow Y shown in FIG. 5 and corresponds to a direction substantially parallel to the second lateral wall portion 52. The gasket 4 is a notch recess. In the state of being fitted in 12, it corresponds to the thickness direction of the one wall portion 11A. The first lateral wall portion 51 is bent in a U shape so as to conform to the shape of the notch surface 12 a of the notch recess 12, and the second lateral wall portion 52 is an upper edge of the first lateral wall portion 51. When the gasket 4 is fitted in the notch recess 12, it is formed flat so as to be substantially parallel to the upper end surface 11 a of the peripheral wall portion 11. A pair of tongue pieces 53 are formed on the vertical wall portion 50 by cutting and raising. That is, the pair of tongue pieces 53 and 53 are formed by cutting and raising a part of the vertical wall portion 50 so as to be separated from each other. And this pair of tongue piece parts 53 and 53 bend | fold 90 degree | times so that the front side of the cut-and-raised piece part (cut-and-raised part) 53a and 53a perpendicular | vertical to the vertical wall part 50 may face each other in the opposite direction. Thus, the tip side of the pair of tongue pieces 53, 53 is in a state orthogonal to the thickness direction of the gasket 4 (core body 5).
The pair of tongue pieces 53 and 53 are cut and raised in the vicinity of the upper edge of the first lateral wall portion 51 so as to be substantially parallel to the pushing direction a (see FIG. 1) described later. Cut-and-raised piece portions 53a and 53a, which are the base portions of the tongue piece portions 53 and 53, are formed so as to be substantially parallel to the pushing direction a.

As shown in FIG. 2, both upper end portions of the U-shaped seal surface portion 60 are formed so as to protrude in the opposite directions in the surface area direction of the one wall portion 11A, and the protruding portions serve as protruding portions 63 and 63. . The lower surface 63a of the protrusions 63 and 63 has a shape along the chamfered surface of the notched corners 12b and 12b that have been chamfered. The tongue pieces 53 and 53 are formed so as to extend in the vicinity of the projecting portions 63 and 63. As shown in FIG. 5, the protrusion 61 that is the first pressing action portion and the extended portion 52 a that is the second pressing action portion are located on the outside in the thickness direction (arrow Y direction) with the seal surface portion 60 interposed therebetween. It is provided on both sides. Thus, if the protrusion 61 and the extension part 52a are provided on both sides with the seal surface part 60 interposed therebetween in the thickness direction, the protrusion 61 and the extension part 52a can be pressed simultaneously. If the rubber exterior portion 6 is fitted into the notch recess 12 by simultaneously pressing the protrusion 61 and the extension 52a, the entire seal surface 60 can be easily brought into elastic contact with the notch recess 12 without any deviation. Further, a cover portion 64 that extends in the surface area direction of the one wall portion 11 </ b> A extends from the outer peripheral edge portion of the rubber exterior portion 6 that covers the vertical wall portion 50 of the core body 5. The cover portion 64 is formed so as to protrude also from the peripheral edge portions of the protruding portions 63 and 63. Further, an inner flange 65 is formed at the inner surface of the first member 1 in the seal surface portion 60 so as to spread in the surface area direction of the one wall portion 11A.
In the illustrated example, the outer surface of the core body 5 is covered with the rubber exterior portion 6, but the inner surface may also be covered. Alternatively, the longitudinal wall portion 50 of the core body 5 and The space surrounded by the lateral wall portions 51 and 52 may be filled with the rubber exterior portion 6 and formed into a block shape. Further, in the present specification, the terms “vertical” and “horizontal” refer to the former in the direction along the depth direction of the first member 1, the latter orthogonal to the one wall portion 11 </ b> A of the first member 1, and the first member 1. Means a direction perpendicular to the depth direction.

Next, a usage example of the gasket 4 having the above-described configuration will be described. The gasket 4 is fitted into the notch recess 12 of the first member 1 along the arrow a in FIG. Here, the protrusion 61 of the gasket 4 is formed so that the direction perpendicular to the thickness direction of the gasket 4 and the depth direction of the first member 1 is long, and a finger or a simple tool can be applied. There is enough space available. Therefore, when the gasket 4 is fitted into the notch recess 12, as shown by the white arrows b and c shown in FIGS. The gasket 4 can be fitted by pushing the extension portion 52a along the arrow a by applying a finger or a simple tool. Therefore, this arrow a is the pushing direction. A bead portion 60a is formed on the seal surface portion 60, and the fitting is accompanied by a compression elastic deformation of the bead portion 60a, so that a strong pressing force is required. However, if it is pushed in as indicated by the white arrows b and c, the rubber coating layer 62 and the like (the projecting portion 61 and the extension portion 52a) and the sealing surface with the second member 2 (see FIG. 5). There is no concern of hurting parts that are different from each other). Moreover, the pressing force can be applied uniformly to the gasket 4 in the thickness direction by pressing the protrusion 61 and the extension portion 52a at the same time. Therefore, when the gasket 4 is fitted in the notch recess 12, it is possible to prevent elastic contact with the notch surface 12a in a state where the seal surface portion 60 is offset. Furthermore, since the extension part 52a and the tongue piece part 53 are comprised by a part of the core body 5, rigidity becomes higher than what consists only of rubber materials, and a strong pressing force can be made to act. Further, since the cut-and-raised piece portion 53a which is the base portion of the tongue piece portion 53 is formed by being cut and raised so as to be substantially parallel to the pushing direction a, for example, it is cut and raised so as to intersect the pushing direction a As compared with, it is difficult to bend even when pressed in the pressing direction a, and a larger pressing force can be received. Therefore, even if the gasket 4 is applied to the protrusion 61 with a strong pressing force, the protrusion 61 is not deformed, so that the work of fitting the gasket 4 into the notch recess 12 can be reliably performed.
Further, when the tongue 53 is bent so that the tip side thereof intersects the thickness direction as shown in FIG. 3, the protrusion 61 (first pressing action portion) is extremely in the thickness direction. The region that can be pressed can be expanded while suppressing the protrusion (see FIG. 4).
In a state where the gasket 4 is fitted in the notch recess 12, the one wall portion 11A in the vicinity of the notch recess 12 is sandwiched from the inside and outside by the cover portion 64 and the inner flange portion 65 (see FIG. 5). The first member 1 is, for example, a cylinder head of an automobile engine or an inverter case. In the case of the inverter case, a refrigerant supply pipe or an electric wire for suppressing heat generation is held from the front portion of the gasket 4. A holding hole (not shown) is provided therethrough.

  As described above, after the gasket 4 is fitted into the notch recess 12, the annular gasket 3 is placed on the upper side 4a of the gasket 4 including the upper end surface 11a of the peripheral wall 11 and the rubber coating layer 62 as shown in FIG. Position it so that it rests on it. The annular gasket 3 may be a molded body made of a single rubber or a molded body of a rubber compound containing inorganic or organic fibers. The shape of the annular gasket 3 is not limited to a flat belt, and a bead portion along the circumferential direction is used. It may be provided. Further, the second member 2 to be sealed is placed on the first member 1 via the annular gasket 3, and the first member 1 and the second member 2 are tightened and joined by a bolt (not shown). The bead portion 60a is further compressed by the tightened joint, and the annular gasket 3 is also compressed in the thickness direction. As a result, the interface between the seal surface portion 60 of the gasket 4 and the notch surface 12a of the notch recess 12 is sealed. In addition, the interface between the second member 2 and the upper end surface 11aa of the one wall portion 11A and the upper side portion 4a of the gasket 4 is sealed through the annular gasket 3. Then, as shown in FIG. 9, the protrusion 63 is compressed together with the annular gasket 3 between the notch corner 12b of the notch recess 12 chamfered and the second member 2, and the notch corner 12b Elastically deforms so as to fill the chamfered space. As a result, the so-called three-surface mating portion is securely sealed without using an auxiliary sealant such as a liquid gasket. Incidentally, when the notched corner portion 12b is not chamfered in this way, the gap between the notched recess portion 12 and the notched corner portion 12b due to the dimensional tolerance of the gasket 4 is not filled with the gasket 4, and the sealing performance is maintained. There is a concern that it will disappear.

  Moreover, the side part located in the outer side of the 1st member 1 in the said interface is covered by the cover part 64 extended around the rubber exterior part 6 which covers the vertical wall part 50 of the said core 5, For example, even when high-pressure cleaning water acts, intrusion into the interface of cleaning water is prevented. In addition, in the vicinity of the three-surface mating portion (notched corner portion 12b), the tip side of the tongue piece 53 as a part of the core body 5 is bent so as to intersect the thickness direction. Since the tongue piece portion 53 extends to the vicinity in a state where it is embedded in the protrusion 61 by the rubber exterior portion 6, the cover portion 64 in the three-surface mating portion is not crushed by the high-pressure washing water, and the sealing property in the three-surface mating portion is improved. Maintenance is preferably done. Further, since the tongue piece portion 53 constituted by a part of the core body 5 is covered with the rubber exterior portion 6, for example, the protrusion portion 61 is not exposed to the high-pressure washing water, so that the tongue piece portion 53 is rusted. Can be prevented.

In addition, although the example of the flat slope shape was given as a chamfering shape of the notch corner | angular part 12b, a convex curve shape and a concave curve shape may be sufficient. Moreover, although the example which formed the pair of protrusions 61 and 61 as one side of an action part in series was shown, you may form the said gasket 4 in a reverse C shape in front view, or a center part One may be formed. Further, the example in which the tongue piece portion 53 is formed by cutting and raising a part of the core body 5 has been described, but the tongue piece portion 53 is formed by welding a separately produced tongue piece portion to the longitudinal wall portion 50 of the core body 5. It is also possible to do. Alternatively, the vertical wall portion 50 may be drawn to cause a part of the vertical wall portion 50 to protrude in the thickness direction, and the protruding portion may constitute the pressing action portion. Furthermore, as an object to which the gasket 4 of the present invention is applied, a cylinder head and an inverter case for automobiles are exemplified, but they are fitted into a recess formed in a wall portion of a box-shaped member to seal the notch surface. If it is a thing, the thing of another field is also the object. Moreover, the notch recessed part 12 in which the gasket 4 is fitted should just be formed in the notch shape and the concave shape so that it may lead to the opening part 10 of a box-shaped member, and is not restricted to what is notched after a box-shaped member is shape | molded. For example, when the box-shaped member is made of a resin material, a notch recess 12 as shown in FIG. 1 may be formed at the time of molding.
Further, the cover portion 64 may be omitted if the three-surface mating portion can be sufficiently sealed only by the protruding portion 63. Moreover, it is also possible to integrally mold the rubber exterior portion 6 in the gasket 4 of the present invention and the annular gasket 3 shown in FIG. Further, the core body 5 that reinforces the gasket 4 is not limited to the above-described iron-based steel plate or stainless steel plate. For example, a core body made of a resin material, a rubber material, or the like may be used as long as the core body has higher rigidity than the rubber exterior portion 6. Further, the shape of the core body 5 may be changed. For example, the longitudinal section may have a substantially I shape (not shown). Furthermore, the shape of the core body 5 is not limited to the shape matching the notch recess 12, and may be changed as appropriate as long as the shape of the rubber exterior portion 6 can be maintained. Further, if the gasket 4 and each of the box-shaped members to which the gasket 4 is applied can be manufactured with high accuracy so that no gap is generated in the three-surface mating portion, the cover portion 64 is omitted, and the notch angle It is not necessary to chamfer the portion 12b. Further, the gasket 4 does not necessarily include both the protrusion 61 as the first pressing action part and the extension part 52a as the second pressing action part, and has at least one of the pressing action parts. Also good.

1 First member (box-shaped member)
DESCRIPTION OF SYMBOLS 10 Opening part 11A One wall part 12 Recessed part 12a Notch surface 4 Gasket 5 Core body 52a Extension part (2nd press action part)
53 Tongue piece part 53a Cut and raised part 6 Rubber exterior part 60 Seal surface part 61 Projection part (first pressing action part)
a Pushing direction

Claims (6)

A gasket that is fitted into a notch recess formed to communicate with the opening in one wall of a box-shaped member having an opening on at least one surface, and seals the notch recess,
A rubber exterior portion having a seal surface portion that is elastically contacted with the notch recess, and is configured to be higher in rigidity than the rubber exterior portion, and is covered with the rubber exterior portion. With a core,
A gasket comprising a part of the core, and having a pressing action part that protrudes in the thickness direction and can press the rubber exterior part in the direction of pressing into the notch recess from the opening side. The gasket according to claim 1,
The gasket, wherein the pressing portion is provided on both sides of the seal surface portion in the thickness direction. The gasket according to claim 1 or 2,
The core body is made of a metal material, includes a tongue piece portion formed by cutting and raising a part of the core body, and has a first pressing action portion that is covered with the rubber exterior portion. A gasket characterized by. The gasket according to claim 3,
The said tongue piece part is cut and raised so that it may become substantially parallel to the said pushing direction. The gasket according to claim 4,
The gasket, wherein the tongue piece is bent so that a tip side thereof intersects the thickness direction. In the gasket according to any one of claims 1 to 5,
The core includes a lateral wall portion formed so as to align with the cutout recess along the thickness direction,
A gasket having a second pressing action portion in which a part of the lateral wall portion is extended in the thickness direction.

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