JP2021071151A - Gasket and sealing structure - Google Patents

Abstract

To provide a gasket that can improve workability, and to provide a sealing structure.SOLUTION: A metal gasket 100 for sealing a gap between opposed surfaces of a first member 200 and a second member 300 is provided with a bent part 130 curved toward the first member 200 in at least part of a side wall surface of an outer periphery along the side wall surface.SELECTED DRAWING: Figure 2

Description

The present invention relates to a metal gasket and a sealing structure for sealing a gap between facing surfaces of two members.

As a gasket for sealing the gap between the facing surfaces of the two members, a gasket composed of a metal plate-shaped member is known. A metal gasket according to a conventional example will be described with reference to FIG. 8 is a schematic view of the gasket according to the conventional example, FIG. 8A is a plan view of the gasket according to the conventional example, and FIG. 8B is a sectional view taken along line BB in FIG. 8A.

The gasket 500 is composed of a metal plate-shaped member, through which a through hole 510 forming a part of a sealing region (sealing region) and a shaft portion such as a bolt for fixing two members (not shown) are inserted. A plurality of prepared holes 520 are provided. When the gasket 500 configured in this way is incorporated between the two members, for example, after the operator carries the gasket 500 and places it on one of the two members in a positioned state, the gasket 500 is placed on the gasket 500. Place the other member on the gasket and fix the two members with bolts or the like.

Here, in the case of the gasket 500 made of a metal plate-shaped member, the boundary portion between the side wall surface and the front surface of the outer periphery and the boundary portion between the back surface are generally formed of sharp corner portions E. Therefore, when the gasket 500 is large and heavy, the operator must carry the gasket 500 so that the fingertips do not hit the corners E, which causes a decrease in workability. Further, since both sides of the gasket 500 are formed of flat surfaces, positioning of the gasket 500 and the two members may have to rely on the visual inspection of an operator, and the positioning work may be troublesome.

Japanese Unexamined Patent Publication No. 2006-266099 Jikkenhei 6-67961

An object of the present invention is to provide a gasket and a sealing structure capable of improving workability.

The present invention employs the following means to solve the above problems.

That is, the gasket of the present invention is
A metal gasket that seals the gap between the facing surfaces of two members.
At least a part of the outer peripheral side wall surface is provided with a bent portion that curves toward at least one of the one member side and the other member side of the two members along the side wall surface. It is characterized by being.

Further, the sealed structure of the present invention is
2 members and
A metal gasket that seals the gap between the facing surfaces of these two members, and
It is a sealed structure with
At least a part of the side wall surface on the outer periphery of the gasket has a bent portion that curves toward at least one of the one member side and the other member side of the two members along the side wall surface. It is characterized in that it is provided.

According to these inventions, since a curved bent portion is provided on at least a part of the side wall surface on the outer periphery of the gasket, the gasket can be carried while holding the bent portion.

Further, it is preferable that the bent portion is provided in a region outside the contact surface with the two members.

As a result, the bent portion can be used as a positioning reference with the two members.

Further, the gasket includes a plurality of laminated metal plate-like members.
Of the plurality of plate-shaped members, the one-side plate-shaped member that is in close contact with one of the two members is provided with a bent portion that is curved toward the one member.
Of the plurality of plate-shaped members, the other side plate-shaped member that is in close contact with the other member of the two members may be provided with a bent portion that is curved toward the other member.

As a result, the bent portion of the one-side plate-shaped member can be used as a positioning reference for one of the two members, and the bent portion of the other side plate-shaped member can be used as a positioning reference for the other member of the two members. It can be used.

In addition, each of the above configurations can be adopted in combination as much as possible.

As described above, according to the present invention, workability can be improved.

FIG. 1 is a schematic view of a gasket according to a first embodiment of the present invention. FIG. 2 is an explanatory view of the work of assembling the gasket according to the first embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of the sealed structure according to the first embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of the gasket according to the second embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of the gasket according to the third embodiment of the present invention. FIG. 6 is a plan view of the gasket according to the fourth embodiment of the present invention. FIG. 7 is a plan view of the gasket according to the fifth embodiment of the present invention. FIG. 8 is a schematic view of the gasket according to the conventional example.

Hereinafter, embodiments for carrying out the present invention will be described in detail exemplarily based on examples with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in this embodiment are not intended to limit the scope of the present invention to those, unless otherwise specified. ..

(Example 1)
The gasket and the sealing structure according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. 1 is a schematic view of the gasket according to the first embodiment of the present invention, FIG. 1A is a plan view of the gasket according to the first embodiment, and FIG. 1B is a sectional view taken along line AA in FIG. 1A. Is. FIG. 2 is an explanatory view of the gasket assembling work according to the first embodiment of the present invention, and shows the configuration of each member in cross section. FIG. 3 is a schematic cross-sectional view of the sealed structure according to the first embodiment of the present invention. The cross-sectional view of the gasket in FIG. 3 corresponds to the cross-sectional view of AA in FIG. 1 (a).

<Sealed structure>
In particular, the entire sealing structure will be described with reference to FIG. The sealing structure according to this embodiment includes two members and a metal gasket 100 that seals a gap between the facing surfaces of the two members. Hereinafter, one of the two members will be referred to as a first member 200, and the other member will be referred to as a second member 300.

The first member 200 includes a hole 210 forming a part of a sealed space (sealed space), and the second member 300 also includes a hole 310. For example, when the gap between the tubular members is sealed by the gasket 100, holes 210 and 310 are provided in both the first member 200 and the second member 300, respectively, as described above. Further, in the case of a sealing structure in which the case and the lid that closes the opening of the case are sealed with a gasket, for example, a hole 310 (corresponding to the inside of the case) is provided for the second member 300 as the case. In some cases, the first member 200 as a lid is not provided with a hole.

Then, the gasket 100 has a surface facing the second member 300 in the first member 200 (referred to as the first facing surface 220) and a surface facing the first member 200 in the second member 300 (the second facing surface 320). It plays a role of sealing the gap between it and (referred to as). That is, with the gasket 100 sandwiched between the first facing surface 220 and the second facing surface 320, the first member 200 and the second member 300 are fixed to the first facing surface 220. The gap between the second facing surface 320 is sealed by the gasket 100.

<Gasket>
The gasket 100 according to this embodiment will be described in more detail. The gasket 100 according to this embodiment is composed of a metal plate-shaped member. The gasket 100 has a plurality of prepared holes through which a through hole 110 forming a part of the sealing region (sealing region) and a shaft portion such as a bolt for fixing the first member 200 and the second member 300 are inserted. 120 is provided.

Then, on the side wall surface of the outer periphery of the gasket 100 according to the present embodiment, a bent portion 130 that curves toward the first member 200 is provided along the side wall surface. In this embodiment, the bent portion 130 is provided over the entire circumference of the side wall surface on the outer periphery of the gasket 100. Further, the bent portion 130 is provided in a region outside the contact surface with the first member 200. In FIG. 1, the dotted line 200X indicates the position of the outer periphery of the first member 200 when the first member 200 is in close contact with the gasket 100. If the gap (clearance) between the dotted line 200X and the tip of the bent portion 130 is narrowed, the positioning accuracy between the gasket 100 and the first member 200 is improved. Further, as shown in FIG. 3, the bent portion 130 is configured to protrude outward from the outer peripheral surface 230 of the first member 200 and the outer peripheral surface 330 of the second member 300.

<Gasket installation work>
In particular, with reference to FIG. 2, the work of assembling the gasket 100 according to this embodiment will be described. First, the operator places the gasket 100 on the second facing surface 320 of the second member 300 in a positioned state. At this time, the bent portion 130 of the gasket 100 is in a state of protruding outward from the outer peripheral surface 330 of the second member 300. Next, the operator places the first member 200 on the gasket 100. At this time, if the position of the first member 200 is slightly displaced, a part of the first facing surface 220 of the first member 200 is in a state of riding on the bent portion 130 of the gasket 100. In this case, by sliding the first member 200 until it hits the bent portion 130 near the side opposite to the riding portion (moving in the direction of arrow X in the figure), the first member 200 is moved to an appropriate position. Can be moved to. As a result, the first member 200 can be positioned. That is, the bent portion 130 can be used as a positioning reference.

After that, by fixing the first member 200 and the second member 300 with bolts or the like, the assembling work is completed.

<Excellent points of gasket and sealing structure according to this embodiment>
A curved bent portion 130 is provided on the side wall surface on the outer periphery of the gasket 100 according to the present embodiment. As a result, when the operator carries the gasket 100, there is no problem even if the finger touches the side wall surface (bent portion 130) on the outer periphery thereof, so that the carrying work can be easily performed. Therefore, the work of assembling the gasket 100 can be improved.

Further, in this embodiment, the bent portion 130 is configured to be curved toward the first member 200, and is provided in a region outside the contact surface with the first member 200. As a result, the bent portion 130 can be used as a positioning reference with the first member 200. Therefore, since the positioning of the gasket 100 and the first member 200 becomes easy, the work of assembling the gasket 100 can be further improved.

In this embodiment, the case where the bent portion 130 adopts a configuration in which the bent portion 130 is curved toward the first member 200 is shown. However, the bent portion 130 may be configured to be curved toward the second member 300 and to be provided in a region outside the contact surface with the second member 300. That is, in FIGS. 2 and 3, the gasket 100 can be used as an inside-out state. As a result, the bent portion 130 can be used as a positioning reference with the second member 300. Therefore, since the positioning of the gasket 100 and the second member 300 becomes easy, the work of assembling the gasket 100 can be further improved.

(Example 2)
FIG. 4 shows Example 2 of the present invention. In the first embodiment, the case where the metal gasket is composed of one metal plate-shaped member is shown. On the other hand, in the second embodiment, a case where the metal gasket is composed of two metal plate-shaped members is shown. Since the basic configuration and operation are the same as those in the first embodiment, the same components are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

FIG. 4 is a schematic cross-sectional view of the gasket according to the second embodiment of the present invention. The plan view of the gasket according to this embodiment is the same as that of FIG. 1 (a) shown in the first embodiment, and FIG. 4 corresponds to the AA cross-sectional view of FIG. 1 (a).

The gasket 100S according to this embodiment is composed of two metal plate-shaped members. One of these two plate-shaped members is referred to as a first gasket constituent member 100a, and the other is referred to as a second gasket constituent member 100b. The first gasket constituent member 100a and the second gasket constituent member 100b themselves have the same configuration as the gasket 100 shown in the first embodiment, respectively. The first gasket component 100a and the second gasket component 100b are fixed by welding or the like.

With such a configuration, among the plurality of plate-shaped members, the first gasket constituent member 100a as the one-side plate-shaped member that is in close contact with the first member 200 is provided with a bent portion 130 that curves toward the first member 200. become. The bent portion 130 of the first gasket constituent member 100a is provided in a region outside the contact surface with the first member 200. Further, among the plurality of plate-shaped members, the second gasket constituent member 100b as the other side plate-shaped member that is in close contact with the second member 300 is provided with a bent portion 130 that is curved toward the second member 300. The bent portion 130 of the second gasket constituent member 100b is provided in a region outside the contact surface with the second member 300.

In the gasket 100S and the sealed structure according to the second embodiment as described above, as in the case of the first embodiment, when the operator carries the gasket 100S, the side wall surface (bent portion 130) on the outer periphery thereof is carried. Since there is no problem even if the finger touches the), the carrying work can be easily performed. Therefore, it is possible to improve the assembling work of the gasket 100S.

Further, in the present embodiment, the bent portion 130 (bent portion 130 of the first gasket constituent member 100a) curved toward the first member 200 and the bent portion 130 (second gasket configuration) curved toward the second member 300. A bent portion 130) of the member 100b is provided. As a result, the bent portion 130 of the first gasket constituent member 100a can be used as a positioning reference with the first member 200, and the bent portion 130 of the second gasket constituent member 100b can be used with the second member 300. It can be used as a positioning reference. Therefore, the positioning of the gasket 100S and the first member 200 and the positioning of the gasket 100 and the second member 300 are facilitated, so that the work of assembling the gasket 100S can be further improved.

(Example 3)
FIG. 5 shows Example 3 of the present invention. In the first embodiment, the case where the metal gasket is composed of one metal plate-shaped member is shown. On the other hand, in the third embodiment, a case where the metal gasket is composed of four metal plate-shaped members is shown. Since the basic configuration and operation are the same as those in the first embodiment, the same components are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

FIG. 5 is a schematic cross-sectional view of the gasket according to the third embodiment of the present invention. The plan view of the gasket according to the present embodiment is the same as that shown in FIG. 1 (a) shown in the first embodiment, and FIG. 5 corresponds to the AA cross-sectional view of FIG. 1 (a).

The gasket 100T according to this embodiment is composed of four metal plate-shaped members. Of these four plate-shaped members, the plate-shaped member provided on one surface side is referred to as a first gasket constituent member 100a, and the plate-shaped member provided on the other surface side is referred to as a second gasket constituent member 100b. Further, the two plate-shaped members provided between the first gasket constituent member 100a and the second gasket constituent member 100b are referred to as a third gasket constituent member 100c and a fourth gasket constituent member 100d, respectively.

The first gasket constituent member 100a and the second gasket constituent member 100b themselves are the same as those shown in the second embodiment, and each has the same configuration as the gasket 100 shown in the first embodiment. The third gasket constituent member 100c and the fourth gasket constituent member 100d have the same configuration as the gasket 100 shown in the first embodiment, except that they are not provided with a bent portion.

Then, the third gasket component 100c and the fourth gasket component 100d are sandwiched between the first gasket component 100a and the second gasket component 100b, and the adjacent gasket components are welded to each other by welding or the like. It is fixed.

With such a configuration, among the plurality of plate-shaped members, the first gasket constituent member 100a as the one-side plate-shaped member that is in close contact with the first member 200 is provided with a bent portion 130 that curves toward the first member 200. become. The bent portion 130 of the first gasket constituent member 100a is provided in a region outside the contact surface with the first member 200. Further, among the plurality of plate-shaped members, the second gasket constituent member 100b as the other side plate-shaped member that is in close contact with the second member 300 is provided with a bent portion 130 that is curved toward the second member 300. The bent portion 130 of the second gasket constituent member 100b is provided in a region outside the contact surface with the second member 300.

In the gasket 100T and the sealed structure according to the third embodiment as described above, as in the case of the first embodiment, when the operator carries the gasket 100T, the side wall surface (bent portion 130) on the outer periphery thereof is carried. Since there is no problem even if the finger touches the), the carrying work can be easily performed. Therefore, it is possible to improve the assembling work of the gasket 100T.

Further, in the present embodiment, the bent portion 130 (bent portion 130 of the first gasket constituent member 100a) curved toward the first member 200 and the bent portion 130 (second gasket configuration) curved toward the second member 300. A bent portion 130) of the member 100b is provided. As a result, the bent portion 130 of the first gasket constituent member 100a can be used as a positioning reference with the first member 200, and the bent portion 130 of the second gasket constituent member 100b can be used with the second member 300. It can be used as a positioning reference. Therefore, the positioning of the gasket 100S and the first member 200 and the positioning of the gasket 100 and the second member 300 are facilitated, so that the work of assembling the gasket 100S can be further improved.

As described above, in the case where the gasket includes a plurality of stacked metal plate-shaped members, the first member is the one-side plate-shaped member that is in close contact with the first member 200 among the plurality of plate-shaped members. A configuration may be adopted in which a bent portion 130 curved on the 200 side is provided, and a bent portion 130 curved on the second member 300 side is provided on the other side plate-shaped member that is in close contact with the second member 300. Therefore, even when the gasket is composed of three or five or more plate-shaped members made of laminated metal, the same effect as in the second and third embodiments can be obtained.

(Other Examples)
In the above embodiment, the configuration in which the bent portion 130 is provided over the entire circumference of the side wall surface on the outer periphery of the gasket 100 is shown. However, the bent portion 130 does not necessarily have to be provided over the entire circumference of the side wall surface on the outer periphery of the gasket 100, and a configuration in which the bent portion 130 is provided on at least a part of the side wall surface on the outer periphery can be adopted.

For example, as in the gasket 100U according to the fourth embodiment shown in FIG. 6, the bent portion 130 may be provided only on the opposite pair of sides, or as in the gasket 100V according to the fifth embodiment shown in FIG. 7, the bent portion 130 may be provided. Bending portions 130 may be provided only at the four corners. In FIGS. 6 and 7, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

That is, the bent portion provided on the gasket may be provided at a position where a finger touches when carrying the gasket in order to improve workability when carrying the gasket, and a positioning reference is provided in order to improve positioning workability. It may be provided at the position where it should be. Therefore, the bent portion needs to be provided only at a necessary position. It is desirable to provide the bent portion at a position where the workability when carrying the gasket can be improved and the workability of positioning can be improved, but the bent portion can be provided at a position where the workability of only one of them can be improved. May be provided.

100, 100S, 100T, 100U, 100V Gasket 110 Through hole 120 Pilot hole 130 Bent part 200 First member 210 Hole part 220 First facing surface 230 Outer surface 300 Second member 310 Hole 320 Second facing surface 330 Outer surface

Claims (6)

A metal gasket that seals the gap between the facing surfaces of two members.
At least a part of the outer peripheral side wall surface is provided with a bent portion that curves toward at least one of the one member side and the other member side of the two members along the side wall surface. A gasket characterized by being present. The gasket according to claim 1, wherein the bent portion is provided in a region outside the contact surface with the two members. With multiple stacked metal plate-like members,
Of the plurality of plate-shaped members, the one-side plate-shaped member that is in close contact with one of the two members is provided with a bent portion that is curved toward the one member.
Claim 1 is characterized in that, of the plurality of plate-shaped members, the other side plate-shaped member that is in close contact with the other member of the two members is provided with a bent portion that is curved toward the other member. Or the gasket according to 2. 2 members and
A metal gasket that seals the gap between the facing surfaces of these two members, and
It is a sealed structure with
At least a part of the side wall surface on the outer periphery of the gasket has a bent portion that curves toward at least one of the one member side and the other member side of the two members along the side wall surface. A sealed structure characterized by being provided. The sealing structure according to claim 4, wherein the bent portion is provided in a region outside the contact surface with the two members. The gasket comprises a plurality of superposed metal plate-like members.
Of the plurality of plate-shaped members, the one-side plate-shaped member that is in close contact with one of the two members is provided with a bent portion that is curved toward the one member.
4. The fourth aspect of the plurality of plate-shaped members, wherein the other side plate-shaped member that is in close contact with the other member of the two members is provided with a bent portion that is curved toward the other member. Alternatively, the sealing structure according to 5.

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