Gasket and manufacturing method therefor

Abstract

To facilitate installation of a gasket.SOLUTION: A gasket 30A comprises a first constituent part 41 including a first end part 411, a second constituent part 42 including a second end part 421, and a connection part 61 connecting the first end part 411 and the second end part 421. The first constituent part 41 and the second constituent part 42 each include a base material formed of a metal material, and an elastic body covering the base material. The connection part 61 is a self-crosslinked elastomer connecting the elastic body in the first end part 411 and the elastic body in the second end part 421.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to gaskets and methods of making the same. [Background technology]

[0002] Gaskets that are placed between a pair of opposing structures have been proposed. For example, Patent Document 1 discloses a gasket having a structure in which gaps between multiple divided pieces are sealed with a liquid gasket. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-76467 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the technology of Patent Document 1 has a problem that the liquid gasket needs to be applied at the stage of assembling the gasket, and the management of the liquid gasket, such as storage, is cumbersome. A similar problem is expected in a configuration in which multiple divided pieces are bonded with, for example, a liquid adhesive. In consideration of the above circumstances, one aspect of the present disclosure aims to facilitate the assembly of the gasket. [Means for solving the problem]

[0005] A gasket according to one embodiment of the present disclosure comprises a first component including a first end, a second component including a second end, and a connecting portion connecting the first end and the second end, wherein each of the first component and the second component includes a base material formed of a metal material and an elastomer covering the base material, and the connecting portion is a self-crosslinking elastomer connecting the elastomer at the first end and the elastomer at the second end.

[0006] A method for manufacturing a gasket according to one embodiment of the present disclosure is a method for manufacturing a gasket having a first component including a first end and a second component including a second end, each of the first component and the second component including a base material formed of a metal material and an elastomer covering the base material, the method including a step of preparing the first component and the second component, and a step of connecting the elastomer at the first end and the elastomer at the second end with a connecting part formed of a self-crosslinking elastomer. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a side view of the sealing mechanism according to the first embodiment. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 11 is an explanatory diagram of a punching process in a comparative example. [Diagram 5] FIG. 2 is an explanatory diagram of a punching process in the first embodiment. [Figure 6] FIG. 4 is an enlarged plan view of the vicinity of the connecting portion. [Figure 7] 7 is a cross-sectional view taken along line VII-VII in FIG. 6. [Figure 8] FIG. 4 is a plan view of the connecting portion in an initial state. [Figure 9] FIG. 4 is an explanatory diagram of a manufacturing process of a gasket. [Figure 10] FIG. 11 is a plan view of a gasket according to a second embodiment. [Figure 11] FIG. 11 is an enlarged plan view of the vicinity of a connecting portion in the second embodiment. [Figure 12] 12 is a cross-sectional view taken along line XII-XII in FIG. 11. [Figure 13] FIG. 4 is a cross-sectional view of the sealing mechanism with a gasket installed therein. [Figure 14] 10A to 10C are explanatory views of a manufacturing process of a gasket in the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] A: First embodiment Fig. 1 is a cross-sectional view of a sealing mechanism 100 according to a first embodiment of the present disclosure. As illustrated in Fig. 1, the sealing mechanism 100 of the first embodiment includes a first member 10, a second member 20, and a gasket 30A. For convenience, Fig. 1 illustrates a state in which the first member 10 and the second member 20 are separated from each other.

[0009] The first member 10 is a hollow member having an opening 12 formed in a joining surface 11. Similarly, the second member 20 is a hollow member having an opening 22 formed in a joining surface 21. The first member 10 and the second member 20 are fixed to each other by a fastener (not shown) such as a bolt. The internal space of the first member 10 and the internal space of the second member 20 are in communication with each other.

[0010] The gasket 30A is an annular sealing member disposed between the first member 10 and the second member 20. Specifically, the gasket 30A is sandwiched between the joint surface 11 of the first member 10 and the joint surface 21 of the second member 20. In the above configuration, the internal space of the sealing mechanism 100 is sealed by the gasket 30A.

[0011] FIG. 2 is a plan view of the gasket 30A. As illustrated in FIG. 2, the gasket 30A has a generally rectangular ring shape (i.e., a rectangular frame shape). The gasket 30A of the first embodiment includes a plurality of constituent parts 40 and a plurality of connecting parts 61. Each of the plurality of constituent parts 40 is a long part formed in a straight line, a folded line, or a curved line. The constituent parts 40 are connected to each other by the connecting parts 61 to form the ring-shaped gasket 30A. Specifically, two adjacent constituent parts 40 are connected to each other by the connecting parts 61.

[0012] Fig. 3 is a cross-sectional view of each component 40. As illustrated in Fig. 3, each component 40 includes a base material 51 and an elastic body 52. ​​The base material 51 is a hard plate-like member, and is formed, for example, from a metal material. Specifically, the base material 51 is formed, for example, from a stainless steel plate, a cold-rolled steel plate, a galvanized steel plate, or an aluminum plywood.

[0013] The elastic body 52 is an elastic film formed of an elastic material and covering the base material 51. The elastic body 52 of the first embodiment includes a first elastic body 521 and a second elastic body 522. The first elastic body 521 covers one surface of the base material 51. The second elastic body 522 covers the other surface of the base material 51. That is, each component 40 is a laminate in which the base material 51 is interposed between the first elastic body 521 and the second elastic body 522. Note that a surface treatment may be performed on the surface of the base material 51 to ensure adhesion with the elastic body 52.

[0014] The elastic body 52 is made of a synthetic rubber sheet (for example, foamed rubber) containing one or more kinds of rubber compounds selected from, for example, nitrile rubber, styrene butadiene rubber, fluororubber, acrylic rubber, and silicone rubber.

[0015] Each of the components 40 exemplified above is manufactured by partially punching out a plate-like material (hereinafter referred to as the "base member") with a press (punching process). The base member is a laminated substrate in which both sides of a metal plate are covered with elastic films.

[0016] Fig. 4 is an explanatory diagram of punching in a form (hereinafter referred to as "Comparative Example") in which a gasket 81 having an outer shape similar to that of the gasket 30A of the first embodiment is formed from a single member. As illustrated in Fig. 4, in the Comparative Example, the area of ​​the base member 80 located outside and inside the gasket 81 is discarded. As described above, in the Comparative Example, a large base member 80 is required, and moreover the number of gaskets 81 produced from the base member 80 is small, making it difficult to reduce the manufacturing cost. In addition, since a large portion of the base member 80 is discarded, improvements are required from the viewpoint of environmental protection.

[0017] Fig. 5 is an explanatory diagram of the punching process in the first embodiment. As illustrated in Fig. 5, in the first embodiment, a plurality of components 40 having similar shapes are manufactured from a base member 80 in a state in which they are close to each other. Therefore, the size required for the base member 80 is reduced compared to the comparative example, and the area of ​​the base member 80 that is discarded is reduced. According to the above configuration, the number of gaskets 30A manufactured from the base member 80 is increased compared to the comparative example, thereby reducing manufacturing costs, and the effective use of resources can also contribute to environmental protection.

[0018] Fig. 6 is a plan view focusing on any one of the connecting portions 61 of the gasket 30A of the first embodiment. Any two adjacent components 40 of the multiple components 40 of the gasket 30A are illustrated in Fig. 6 as a first component 41 and a second component 42. That is, for each pair of two adjacent components 40, the configuration illustrated in Fig. 6 is adopted.

[0019] As illustrated in FIG. 6, the first component 41 includes a first end 411, and the second component 42 includes a second end 421. The first end 411 is an end of the first component 41 that is closer to the second component 42. The second end 421 is an end of the second component 42 that is closer to the first component 41. The first end 411 includes a first end face 412, and the second end 421 includes a second end face 422. The first end face 412 and the second end face 422 face each other. In the first embodiment, the first end face 412 and the second end face 422 contact each other without any gap.

[0020] The connecting portion 61 connects the first end portion 411 and the second end portion 421. The connecting portion 61 in the first embodiment is made of a self-crosslinking elastomer. The self-crosslinking elastomer is a polymer material in which crosslinking occurs at room temperature (for example, 1°C to 30°C). Examples of materials for the connecting portion 61 include various ion-crosslinked rubbers such as silicone-based, acrylic-based, and polyurethane-based rubbers.

[0021] Specifically, the connecting portion 61 connects the elastic body 52 at the first end 411 to the elastic body 52 at the second end 421. That is, the elastic body 52 at the first end 411 and the elastic body 52 at the second end 421 are joined to the connecting portion 61 by cross-linking of the connecting portion 61. Therefore, the first end 411 and the second end 421 are connected via the connecting portion 61. The self-crosslinking elastomer constituting the connecting portion 61 not only functions as an element that connects the respective components 40, but also functions as a seal member that seals the internal space of the sealing mechanism 100 together with the respective components 40.

[0022] Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 6. As illustrated in Fig. 7, the outer surfaces of each of the first component 41 and the second component 42 include a first surface S1, a second surface S2, an inner wall surface S3, and an outer wall surface S4. The first surface S1 and the second surface S2 are main surfaces facing in opposite directions. As illustrated in Fig. 1, the first surface S1 faces the joining surface 11 of the first member 10, and the second surface S2 faces the joining surface 21 of the second member 20.

[0023] The inner wall surface S3 and the outer wall surface S4 are side surfaces between the first surface S1 and the second surface S2. The inner wall surface S3 is a side surface that constitutes the inner circumference of the annular gasket 30A. That is, the inner wall surface S3 is located on the inner space side of the sealing mechanism 100. On the other hand, the outer wall surface S4 is a side surface that constitutes the outer circumference of the annular gasket 30A. That is, the inner wall surface S3 is located on the outside (atmosphere side) of the sealing mechanism 100.

[0024] 6, the connecting portion 61 partially surrounds the boundary surface B between the first end surface 412 and the second end surface 422. Specifically, the connecting portion 61 is formed in a U-shape in contact with the first surface S1, the second surface S2, and the inner wall surface S3, as illustrated in FIG. 7. On the other hand, the outer wall surface S4 of each component 40 is exposed from the connecting portion 61. Therefore, the outer wall surface S4 comes into contact with the atmosphere around the sealing mechanism 100.

[0025] Fig. 8 is a plan view of the connecting portion 61 in an initial state before installation (hereinafter referred to as "initial state"). As illustrated in Fig. 8, the connecting portion 61 in the initial state is formed in an elongated shape. The length L of the connecting portion 61 is set to a dimension that is twice or more the width W of the connecting portion 61 (L ≥ 2W). The thickness of the connecting portion 61 is set to, for example, 0.1 mm or more and 1 mm or less.

[0026] As described above, in the initial state, the flat connecting portion 61 is joined to the first component portion 41 and the second component portion 42 in a state where it is bent at two points (Q1, Q2) in the longitudinal direction. Specifically, the connecting portion 61 includes a portion 611 covering the first surface S1 of each component portion 40, a portion 612 covering the second surface S2 of each component portion 40, and a portion 613 covering the inner wall surface S3 of each component portion 40. The outer wall surface S4 of the component portion 40 is exposed from the connecting portion 61 between the portion 611 and the portion 612 of the connecting portion 61.

[0027] 9A to 9C are diagrams illustrating the manufacturing process of the gasket 30A described above. The manufacturing process of Fig. 9 is one example of a "gasket manufacturing method".

[0028] 9, in step P1, a plurality of components 40 are prepared. Specifically, as described with reference to FIG. 5, a plurality of components 40 are manufactured by punching a base member 80.

[0029] In step P2 after execution of step P1, the elastic body 52 at the first end 411 of the first component 41 and the elastic body 52 at the second end 421 of the second component 42 are connected by a connecting portion 61. As described above, each connecting portion 61 is formed of a self-crosslinking elastomer. The gasket 30A is formed by connecting a plurality of components 40 in an annular shape by the connecting portions 61.

[0030] As described above, in the first embodiment, the first end 411 of the first component 41 and the second end 421 of the second component 42 are connected by the connecting portion 61 made of a self-crosslinking elastomer. Therefore, in the stage of assembling the gasket 30A to the sealing mechanism 100, the liquid gasket of Patent Document 1 or the work of applying a liquid adhesive that connects the components 40 is not necessary. This makes it possible to facilitate the assembly of the gasket 30A.

[0031] In the first embodiment, the boundary surface B between the first end surface 412 and the second end surface 422 is surrounded by the connecting portion 61. Therefore, compared to the embodiment in which the connecting portion 61 is provided between the first end surface 412 and the second end surface 422, the first end surface 411 and the second end surface 421 can be connected more firmly.

[0032] In the first embodiment, the connecting portion 61 contacts the first surface S1, the second surface S2, and the inner wall surface S3, and the outer wall surface S4 is exposed from the connecting portion 61. The connecting portion 61 can be installed by bending the flat connecting portion 61 in the initial state so as to contact the first surface S1, the second surface S2, and the inner wall surface S3. Therefore, compared to a form using an annular connecting portion 61 that surrounds the first component 41 and the second component 42 over the entire circumference, for example, the work of installing the connecting portion 61 is easier. On the other hand, the inner wall surface S3 of each component 40 that is close to the internal space of the sealing mechanism 100 is covered by the connecting portion 61, so that the sealing property of the internal space is sufficiently maintained. That is, according to the first embodiment, it is possible to both facilitate the work of installing the connecting portion 61 and ensure the sealing property.

[0033] B: Second embodiment 10 is a plan view of a gasket 30B in the second embodiment. In the sealing mechanism 100 of the second embodiment, the gasket 30A in the first embodiment is replaced with the gasket 30B in FIG.

[0034] The gasket 30B of the second embodiment has a generally rectangular ring shape (i.e., a rectangular frame shape). The gasket 30B of the second embodiment includes a plurality of components 40, a plurality of connecting portions 62, and a plurality of holding members 70. The structure of each component 40 is similar to that of the first embodiment. The components 40 are connected to each other by the connecting portions 62 and the holding members 70 to form the ring-shaped gasket 30B.

[0035] Fig. 11 is a plan view focusing on one connecting portion 62 of the gasket 30B of the second embodiment. As in Fig. 5, the first component portion 41 and the second component portion 42 adjacent to each other are shown in Fig. 11. The connecting portion 62 of the second embodiment connects a first end portion 411 of the first component portion 41 and a second end portion 421 of the second component portion 42. The connecting portion 62 is made of a self-crosslinking elastomer like the connecting portion 61 of the first embodiment.

[0036] Fig. 12 is a cross-sectional view taken along line XII-XII in Fig. 11. As illustrated in Figs. 11 and 12, the first end 411 in the second embodiment is a portion bent at a right angle to a portion of the first component part 41 other than the first end 411. That is, the first end 411 protrudes vertically from the surface of the first component part 41. Similarly, the second end 421 is a portion bent at a right angle to a portion of the second component part 42 other than the second end 421. That is, the second end 421 protrudes vertically from the surface of the second component part 42.

[0037] The first end 411 includes a first end surface 412, and the second end 421 includes a second end surface 422. The first end surface 412 and the second end surface 422 face each other with a gap therebetween. As illustrated in FIG. 11 and FIG. 12, the connecting portion 62 of the second embodiment is disposed between the first end surface 412 and the second end surface 422. Specifically, the elastic bodies 52 of the first end 411 and the second end 421 are joined to the connecting portion 62 by bridging the connecting portion 62. With the above configuration, the first end 411 and the second end 421 are connected via the connecting portion 62.

[0038] Moreover, the gasket 30B of the second embodiment includes a plurality of holding members 70. A holding member 70 is provided for each pair of the first end portion 411 and the second end portion 421. The holding member 70 is an annular member formed of an elastic material. For example, the holding member 70 is formed of various resin materials such as nitrile rubber, styrene butadiene rubber, fluororubber, acrylic rubber, and silicone rubber.

[0039] As illustrated in FIG. 11 and FIG. 12, the holding member 70 surrounds the first end 411 and the second end 421. Specifically, the inner circumferential surface of the holding member 70 contacts the first end 411 and the second end 421. The holding member 70 maintains the state in which the first end 411 and the second end 421 are connected by the connecting portion 62. As described above, in the second embodiment, in addition to the configuration in which the first end 411 and the second end 421 are connected by the connecting portion 62, the holding member 70 surrounding the first end 411 and the second end 421 is installed. Therefore, compared to a form in which the holding member 70 is not installed, the first end 411 and the second end 421 can be firmly connected. The holding member 70 may be omitted.

[0040] FIG. 13 is a cross-sectional view of the gasket 30B installed in the sealing mechanism 100. As illustrated in FIG. 13, an accommodation space 13 is formed in the joint surface 11 of the first member 10. An accommodation space 13 is formed for each pair of the first end 411 and the second end 421. The accommodation space 13 is a recess that accommodates the first end 411, the second end 421, the connecting portion 62, and the holding member 70. The outer peripheral surface of the holding member 70 contacts the inner wall surface of the accommodation space 13. That is, the holding member 70 functions as a seal member that seals between the first end 411 and the second end 421 and the first member 10.

[0041] 14 is an explanatory diagram of a manufacturing process for the gasket 30B in the second embodiment. The manufacturing process in FIG. 14 is an example of a "gasket manufacturing method".

[0042] As in the first embodiment, in step P1, a plurality of components 40 are prepared. In step P2 after the execution of step P1, the elastic body 52 at the first end 411 of the first component 41 and the elastic body 52 at the second end 421 of the second component 42 are connected by a connecting portion 62. As described above, each connecting portion 62 is formed of a self-crosslinking elastomer. In step P3 after the execution of step P2, a holding member 70 is installed so as to surround the first end 411 and the second end 421.

[0043] The second embodiment also achieves the same effects as the first embodiment. Moreover, in the second embodiment, the connecting portion 62 is provided between the first end face 412 of the bent first end 411 of the first component part 41 and the second end face 422 of the bent second end 421 of the second component part 42. Therefore, it is easy to sufficiently secure the areas (first end face 412, second end face 422) of the first component part 41 and the second component part 42 that are joined to the connecting portion 62.

[0044] C: Modification Specific modified embodiments added to each of the above-mentioned embodiments are exemplified below. Two or more embodiments selected from the following examples may be appropriately combined as long as they are not mutually contradictory.

[0045] (1) In the first embodiment, the connecting portion 62 contacts the first surface S1, the second surface S2, and the inner wall surface S3 of the component 40, and the outer wall surface S4 of the component 40 is exposed from the connecting portion 62. However, the shape of the connecting portion 62 is not limited to the above example. For example, in the first embodiment, the connecting portion 62 may be formed in a ring shape. Specifically, the connecting portion 62 may contact the first surface S1, the second surface S2, the inner wall surface S3, and the outer wall surface S4 of the component 40.

[0046] (2) The laminated structure of each component 40 is not limited to the examples in the above-mentioned embodiments. For example, a base film may be formed between the base material 51 and the elastic body 52 in each component 40 to improve adhesion between them. In addition, the base material 51 or the elastic body 52 may be formed by laminating multiple layers made of different materials.

[0047] (3) The planar shape of the gasket 30 (30A, 30B) is not limited to the examples in the above-mentioned embodiments. For example, the above-mentioned embodiments are similarly applied to a gasket 30 having a circular or polygonal shape. In addition, the number of components 40 constituting the gasket 30 is not limited to the examples in the above-mentioned embodiments. For example, the gasket 30 may be composed of two components 40.

[0048] (4) The term "nth" (n is a natural number) in this application is used only as a formal and convenient label to distinguish each element in the description and does not have any substantial meaning. Therefore, there is no room for restrictive interpretation of the position of each element or the order of production, etc., based on the term "nth".

[0049] D: Notes From the above-described exemplary embodiments, the following configurations can be understood, for example.

[0050] A gasket according to one embodiment (embodiment 1) of the present disclosure is a gasket including a first component including a first end, a second component including a second end, and a connecting part connecting the first end and the second end, each of the first component and the second component including a base material formed of a metal material and an elastomer covering the base material, and the connecting part is a self-crosslinking elastomer connecting the elastomer at the first end and the elastomer at the second end. In the above embodiment, the first end of the first component and the second end of the second component are connected by the connecting part made of the self-crosslinking elastomer. Therefore, in the stage of assembling the gasket to the sealing mechanism, it is not necessary to apply the liquid gasket of Patent Document 1 or a liquid adhesive that connects each component. Therefore, it is possible to facilitate the assembly of the gasket.

[0051] In a specific example (Aspect 2) of Aspect 1, the first end includes a first end surface, the second end includes a second end surface that contacts the first end surface, and the connecting portion surrounds the boundary surface between the first end surface and the second end surface. In the above aspect, the boundary surface between the first end surface and the second end surface is surrounded by the connecting portion. Therefore, the first end surface and the second end surface can be more firmly connected than in an embodiment in which the connecting portion is provided between the first end surface and the second end surface.

[0052] In a specific example (aspect 3) of aspect 2, each of the first component and the second component includes a first surface, a second surface opposite to the first surface, an inner wall surface between the first surface and the second surface, and an outer wall surface between the first surface and the second surface, and the connecting portion contacts the first surface, the second surface, and the inner wall surface, and the outer wall surface is exposed from the connecting portion. In the above aspect, the connecting portion contacts the first surface, the second surface, and the inner wall surface, and the outer wall surface is exposed from the connecting portion. Therefore, in the initial state before installation, the connecting portion can be installed by bending the flat connecting portion so that it contacts the first surface, the second surface, and the inner wall surface. Therefore, the work of installing the connecting portion is easier than, for example, a form using a ring-shaped connecting portion that surrounds the first component and the second component over the entire circumference. On the other hand, the inner wall surfaces of the first component and the second component that are close to the internal space to be sealed are covered by the connecting portion, so that the sealing property of the internal space is sufficiently maintained. In other words, it is possible to facilitate the installation of the connecting portion while ensuring a good seal.

[0053] In a specific example (Aspect 4) of Aspect 1, the first end is a portion of the first component bent relative to a portion other than the first end and includes a first end face, the second end is a portion of the second component bent relative to a portion other than the second end and includes a second end face facing the first end face, and the connecting portion is disposed between the first end face and the second end face. In the above aspect, the connecting portion is disposed between the first end face of the bent first end of the first component and the second end face of the bent second end of the second component. Therefore, it is easy to ensure a sufficient area (first end face, second end face) of each of the first component and the second component that is joined to the connecting portion.

[0054] In a specific example (Aspect 5) of Aspect 4, a holding member surrounding the first end and the second end is further provided. In the above aspect, in addition to the configuration in which the first end and the second end are connected by a connecting portion, a holding member surrounding the first end and the second end is provided. Therefore, the first end and the second end can be connected more firmly than in a configuration in which a holding member is not provided.

[0055] A method for manufacturing a gasket according to one embodiment (embodiment 6) of the present disclosure is a method for manufacturing a gasket having a first component including a first end and a second component including a second end, each of the first component and the second component including a base material formed of a metal material and an elastomer covering the base material, the method including a step of preparing the first component and the second component, and a step of connecting the elastomer at the first end and the elastomer at the second end with a connecting part formed of a self-crosslinking elastomer. [Explanation of symbols]

[0056] 100...sealing mechanism, 10...first member, 11...joint surface, 12...opening, 13...accommodation space, 20...second member, 21...joint surface, 22...opening, 30A, 30B...gasket, 40...constituent part, 41...first constituent part, 411...first end, 412...first end face, 42...second constituent part, 421...second end, 422...second end face, 51...base material, 52...elastic body, 521...first elastomer, 522...second elastomer, 61, 62...connecting part, 70...retaining member, 80...base member.

Claims

1. A first component including a first end; a second component including a second end; a connecting portion connecting the first end portion and the second end portion; A gasket comprising: Each of the first component and the second component is A substrate formed of a metal material; and an elastic body covering the base material, The connecting portion is a self-crosslinking elastomer that connects the elastic body at the first end portion and the elastic body at the second end portion. gasket.

2. the first end includes a first end surface; the second end includes a second end surface in contact with the first end surface; The connecting portion surrounds a boundary surface between the first end surface and the second end surface. The gasket of claim 1.

3. Each of the first component and the second component is The first page and a second surface opposite the first surface; an inner wall surface between the first surface and the second surface; an outer wall surface between the first surface and the second surface, the connecting portion contacts the first surface, the second surface, and the inner wall surface; The outer wall surface is exposed from the connecting portion. The gasket of claim 2.

4. the first end portion is a portion of the first component portion that is bent with respect to a portion other than the first end portion, and includes a first end surface; the second end portion is a portion of the second component portion that is bent with respect to a portion other than the second end portion, and includes a second end surface that faces the first end surface; The connecting portion is disposed between the first end surface and the second end surface. The gasket of claim 1.

5. A holding member surrounding the first end and the second end The gasket of claim 4 further comprising:

6. A method for manufacturing a gasket having a first component including a first end and a second component including a second end, the method comprising: Each of the first component and the second component is A substrate formed of a metal material; and an elastic body covering the base material, preparing the first component and the second component; connecting the elastic body at the first end and the elastic body at the second end with a connecting portion formed of a self-crosslinking elastomer; A method for manufacturing a gasket comprising the steps of:

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