JPH095340A - Sealing member mounting structure - Google Patents

Abstract

PURPOSE: To provide a sealing member mounting structure which can prevent the coming off, scratching, and deformation of a sealing member (packing). CONSTITUTION: A sealing member mounting structure seals a connecting section between a shaft 21 carrying an external thread and a hole 33 carrying an internal thread by putting a hollow discoid sealing member (packing) 42 between a first sealing surface 33b formed on the bottom of the hole 33 and second sealing surface 21b formed on the top of the shaft 21. A hollow discoid holder 41 which constrains the inner peripheral edge of the member 42 in the axial direction, rotatably holds the member 42, and has an outside diameter smaller than that of the member 42 is provided and a recessed holder fixing section 33c is formed on the first sealing surface 33b so that only the holder 41 can get in the section 33c and, when the holder 41 gets in the section 33c, the upper surface of the holder 41 can be flushed with the first sealing surface 33b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal member mounting structure for sealing a portion connected by a female screw forming hole and a male screw shaft.

[0002]

2. Description of the Related Art As an attachment structure of this type of seal member, there is one provided in a rotation detecting device 1 as shown in FIG. 10, for example. The rotation detection device 1 includes a rotation detection unit 2 provided in a transmission of an automobile and a speed sensor 3 connected to the rotation detection unit 2. The rotation detection unit 2 is configured to include a hollow male screw shaft 21 having a male screw 21a on the outer circumference of the tip portion, and a rotation transmission shaft 22 provided in the male screw shaft 21. The male screw shaft 21 has a second sealing surface 21b whose front end surface contacts a packing (sealing member) 34 described later. The rotation transmission shaft 22 is formed in a tubular shape, and has a key groove 22a extending axially from the tip thereof.

The speed sensor 3 is provided with a sensor portion 32 in a housing 31, and a female screw forming hole 33 for connecting with the rotation detecting portion 2 is formed at one end of the housing 31. . The female thread forming hole 33 has a female thread 33a that is screwed into the male thread 21a, and its bottom surface is a first seal surface 33b parallel to the second seal surface 21b. A packing 34 is fixed to the first sealing surface 33b with an adhesive. The packing 34 is made of rubber or the like in the shape of a hollow disk, and is compressed by the first seal surface 33b and the second seal surface 21b to form the seal surface 3
It is designed to seal 3b and 21b. That is, the connecting portion between the female screw forming hole 33 and the male screw shaft 21 is sealed to prevent rainwater and the like from entering the housing 3 and the like.

Further, the through hole 3 is formed in the housing 31 so as to communicate with the sensor portion 32 from the central portion of the female screw forming hole 33.
5 is provided, and a connecting shaft 36 is provided so as to project from the through hole 35 to the female screw forming hole 33 side.
The connecting shaft 36 connects the sensor unit 32 and the rotation transmitting shaft 22. A key 36a that fits into the key groove 22a of the rotation transmitting shaft 22 is formed on the outer peripheral portion of the connecting shaft 36.

In the rotation detecting device 1 configured as described above, the male screw shaft 2 provided on the transmission is provided.
1, the female thread forming hole 33 of the housing 30 is screwed and tightened to fix the speed sensor 3 to the rotation detecting portion 2.
Fixed to.

In the mounting structure of the seal member of the rotation detecting device 1, when the female screw forming hole 33 is screwed into the male screw shaft 21 and tightened, the second sealing surface 21b of the male screw shaft 21 is packed with the packing 34. And the packing 34 is compressed by a predetermined amount. As a result, the connecting portion between the female screw forming hole 33 and the male screw shaft 21 is sealed, and rainwater or the like is prevented from entering the housing 3 or the like.

[0007]

However, in the mounting structure of the seal member, the packing 34 fixed to the first seal surface 33b is fixed to the second seal surface 21.
Since b comes into close contact while rotating, the packing 34 is forcedly twisted by the second sealing surface 21b. Therefore, there is a problem that the packing 34 may be peeled off, scratched, or deformed from the first sealing surface 33b.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to prevent the packing (seal member) from being peeled off, damaged, or deformed as described above. An object of the present invention is to provide a seal member mounting structure that can be performed.

[0009]

In order to achieve the above object, the present invention provides a hollow disk-shaped seal member (42),
The first sealing surface (33b) formed on the bottom of the female screw forming hole (33) and the second sealing surface (33b) formed on the top of the male screw shaft (21).
And a sealing surface (21b) of the sealing member (42), which seals the portion connected by the female screw forming hole (33) and the male screw shaft (21). While restraining the peripheral edge in the axial direction,
The seal member (42) is rotatably held, and a hollow disk-shaped holder (41) having an outer diameter smaller than the outer diameter of the seal member (42) is provided in the female screw forming hole (33). Only the disc portion (41a) of the holder (41) is inserted into the first sealing surface (33b), and the holder (41)
Is characterized in that a concave holder fixing surface (33c) is formed so that the upper surface thereof is flush with the first sealing surface (33b).

The holder (41) may be fixed to the holder fixing surface (33c) with an adhesive. The bottom of the female screw forming hole (33) has a first
Of the through-hole (3
5) is provided, and the through hole (35) is provided in the holder (41).
A projection piece (41d) extending along the through hole (35) and press-fitted into the through hole (35).
The holder (41) may be fixed to the position of the holder fixing surface (33c) by press-fitting 1d) into the through hole (35). It is preferable that the protrusion piece (41d) is formed by cutting out a part of the holder (41) and bending it along the through hole (35). further,
The holder (41) may be formed in a dish shape so as to rise from the holder fixing surface (33c) from the inner peripheral portion toward the outer peripheral portion. The sealing member (42) is also preferably formed in a dish shape along the holder (41). Still further, the holder (41) has a tubular portion (41b) penetrating the inner peripheral edge portion of the seal member (42), and by bending an upper end portion (41c) of the tubular portion (41b) to the outside, Seal member (4
2) is restrained in the axial direction, and the seal member (4
2) is preferably configured to be rotatably held.

Further, a hollow disk-shaped seal member (42)
By sandwiching the first sealing surface (33b) formed at the bottom of the female screw forming hole (33) and the second sealing surface (21b) formed at the top of the male screw shaft (21),
A mounting structure of a sealing member for sealing a portion connected with an internal thread forming hole (33) and an external thread shaft (21), wherein a first sealing surface (33) is provided at a bottom portion of the internal thread forming hole (33).
The through hole (35) is provided so as to penetrate the central portion of b), and the through hole (35) of the first sealing surface (33b) is provided.
A tubular portion (33e) penetrating the inner peripheral edge portion of the seal member (42) is integrally formed from the end portion on the side, and the tubular portion (33) is formed.
By bending the upper end portion (33f) of e) outward, the seal member (42) is restrained in the axial direction, and the seal member (42) is rotatably held. It may be one. It is preferable that each of the seal members (42) is formed by integrally providing a seal body (42b) such as rubber on both surfaces of the base plate (42a).

[0012]

In the present invention, the outer peripheral portion of the seal member (42) is rotatably held on the first seal surface (33b) by fixing the holder (41) to the holder fixing surface (33c). It becomes a state. The second seal surface (21b) approaches the seal member (42) while rotating, and finally comes into close contact with the seal member (42) and is further compressed. At this time, the sealing member (42) is compressed with respect to the first sealing surface (33b) and the second sealing surface (21b) while being slightly displaced in the rotational direction. Therefore, as compared with the case where the seal member (42) is fixed to the first seal surface (33b) as in the conventional example, the force for twisting the seal member (42),
That is, since the shearing force acting on the seal member (42) can be reduced, it is possible to prevent the seal member (42) from being damaged or deformed. Moreover, since the seal member (42) is rotated by the holder (41) about the fixed center axis, a fixed portion of the seal member (42) is compressed. Therefore, it is possible to prevent the seal member (42) from being damaged or deformed by being rotated while being eccentric. Further, since the seal member (42) is rotatable both with respect to the first seal surface (33b) and the second seal surface (21b), the seal member (4
Of course, the problem of peeling off 2) can be solved.

In the case where the holder (41) is fixed to the holder fixing surface (33c) with an adhesive, the holder (41)
Can be easily and surely fixed to the holder fixing surface (33c). Further, in the case where the through hole (35) is provided at the bottom of the female screw forming hole (33) and the protrusion piece (41d) press-fitted into the through hole (35) is provided in the holder (41), the holder (41) is Fixing to the holder fixing surface (33c) becomes easier. In the case where the protruding piece (41d) is formed by bending the portion cut out from the holder (41), it is possible to obtain the protruding piece (41d) integrated with the holder (41) and excellent in strength. it can. Further, in the case where the holder (41) is configured in a dish shape, the holder (41) functions as a disc spring, so that the female screw forming hole (33) and the male screw shaft (21) are more firmly fastened. can do. In the case where the seal member (42) is also formed in a disc shape, the seal member (42) also functions as a disc spring and the spring force increases, so that the female screw forming hole (3
3) and the male screw shaft (21) can be connected more firmly.

Further, as the holder (41), a cylindrical portion (41b) penetrating the inner peripheral edge of the seal member (42) is provided, and the upper end portion (41c) of the cylindrical portion (41b) is bent outward. In the structure, the seal member (4
The holder (41) for axially restraining the second member (2) and rotatably holding the seal member (42) can be easily formed at low cost.

Further, a through hole (35) penetrating the central portion of the first seal surface (33b) is provided, and a seal is formed from the end portion of the first seal surface (33b) on the through hole (35) side. The cylindrical portion (3) penetrating the inner peripheral edge of the member (42).
3e) is integrally provided, and the upper end portion (33f) of the tubular portion (33e) is bent outward, whereby the seal member (4
2) is restrained in the axial direction, and the seal member (4
In the configuration in which 2) is rotatably held, the number of parts required for the holder (41) can be reduced, and the cost can be reduced. In the seal member (42) in which seal members (42b) such as rubber are integrally provided on both sides of the base plate (42a), the base plate (42a) provides rigidity for maintaining a flat surface. And the rigidity for rotating coaxially with the holder (41) increases. Therefore,
The seal member (42) can be prevented from being scratched or deformed, and the sealability can be improved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. In these figures, FIG. 1 is the first embodiment, FIGS. 2 to 5 are the second embodiments, FIG. 6 is the third embodiment, and FIG.
8 shows the fourth embodiment, and FIG. 9 shows the fifth embodiment.
However, in these embodiments, elements common to the constituent elements of the conventional example shown in FIG. 10 are designated by the same reference numerals to simplify the description.

First, a first embodiment of the present invention will be described with reference to FIG. In FIG. 1, 33b is a first sealing surface, and this first sealing surface 33b is formed on the bottom surface of the female screw forming hole 33. First sealing surface 33b
A concave holder fixing surface 33c for fixing the holder 41 is formed coaxially with the female screw forming hole 33. The holder fixing surface 33c is formed in a circular shape having a size that only the holder 41 can fit in, and is formed to a depth such that the upper surface of the holder 41 is flush with the first sealing surface 33b. An annular groove 33d is formed on the holder fixing surface 33c along the circumferential direction.

The holder 41 is formed by forming a cylindrical portion 41b which penetrates an inner peripheral edge of a packing (seal member) 42 described later from an inner peripheral edge of a disk portion 41a formed in a hollow disk shape. By bending the upper end portion 41c of the tubular portion 41b outward, the packing 42 is restrained in the axial direction and the packing 42 is rotatably held. The holder 41 is formed of, for example, a metal of aluminum, and the disc portion 41 is made of an adhesive.
a is fixed to the holder fixing surface 33c.

The packing 42 is formed by integrally molding a seal body 42b on both surfaces of a hollow disk-shaped base metal plate (base plate) 42a. The seal body 42b is made of rubber such as NBR or resin. Base metal plate 42
a is formed of, for example, a metal of aluminum. The packing 42 is formed to have an outer diameter larger than that of the disc portion 41a, and a portion protruding outside the disc portion 41a comes into contact with the first seal surface 33b.

In the mounting structure of the seal member in the rotation detecting device 1 constructed as described above, by fixing the holder 41 to the holder fixing surface 33c, the outer peripheral portion of the packing 42 is placed on the first sealing surface 33b. It will be rotatably held. The second sealing surface 21b approaches the packing 42 while rotating, and finally comes into close contact with the packing 42 and is further compressed. At this time, the packing 42 is compressed while being slightly displaced in the rotational direction with respect to both the first seal surface 33b and the second seal surface 21b. Therefore, as compared with the case where the packing 42 is fixed to the first sealing surface as in the conventional example, the twisting force of the packing 42, that is, the shearing force acting on the packing 42 can be reduced, and thus the packing 42 can be reduced. Can be prevented from being damaged or deformed. Moreover, since the packing 42 is rotated by the holder 41 about a fixed central axis, a fixed portion of the packing 42 is compressed. Therefore, it is possible to prevent the packing 42 from being damaged or deformed by being rotated while being eccentric. Further, since the packing 42 is rotatable both with respect to the first sealing surface 33b and the second sealing surface 21b, it is of course possible to solve the problem that the packing 42 comes off.

Further, the holder 41 can be securely fixed to the holder fixing surface 33c with an adhesive. And
At the time of adhesion, since the excess adhesive can be absorbed by the annular groove 33d, the holder 41 can be evenly adhered and fixed to the holder fixing surface 33c. Moreover, the holder 4
By simply bending the upper end portion 41c of the first tubular portion 41b outward,
Since the packing 42 can be easily assembled to the holder 41, it is possible to reduce the cost.

Furthermore, the packing 42 has a rigidity for maintaining a flat surface and a rigidity for rotating coaxially with respect to the holder 41 due to the base metal plate 42a. Therefore, if the packing 42 is damaged,
It is extremely effective in preventing deformation and can improve the sealing property for a long period of time.

Although the holder 41 is made of metal in this embodiment, it may be made of synthetic resin or may be heat-deformed for assembly.

Next, a second embodiment of the present invention will be described with reference to FIGS. However, elements common to the constituent elements of the first embodiment shown in FIG.
The description will be simplified. The second embodiment is different from the first embodiment in that the holder 41 is fixed to the holder fixing surface 33c by press fitting without using an adhesive.

That is, as shown in FIGS. 2 to 5, the holder 41 has a protruding piece 41d which extends along the through hole 35 and is pressed into the through hole 35. The projection piece 41d is a plate-like piece cut out from the disc portion 41a and bent along the through hole 35, and is provided at a position that divides it into three equal parts in the circumferential direction. And the projection piece 41d
Is formed in a trapezoidal shape toward the tip 41e, and the tip 41e is rounded. Further, the circle circumscribing the three projection pieces 41d is formed larger than the through hole 35 by the press-fitting margin, as shown in FIG. However, since the tip 41e of the projection piece 41d is formed narrow, there is a gap D between the tip 41e and the through hole 35.

In the mounting structure of the seal member constructed as described above, the protruding piece 41d of the holder 41 is inserted into the through hole 3
The holder 41 is fixed to the holder fixing surface 33c only by press-fitting it into the holder 5.
Can be fixed to. Moreover, when the press-fitting is started, the tip 41e of the protruding piece 41d is positioned inside the through hole 35,
In addition, since the tip 41e is formed round, press fitting can be easily performed. Therefore, the holder 41 can be easily fixed to the holder fixing surface 33c in a short time, and the cost can be reduced. Further, since the projection piece 41d is formed integrally with the holder 41, the projection piece 4d
It is possible to improve the strength of 1d.

Next, referring to FIG. 6, the third embodiment of the present invention will be described.
An embodiment will be described. However, elements common to the constituent elements of the second embodiment shown in FIGS. 2 to 5 are given the same reference numerals to simplify the description. The third embodiment differs from the second embodiment in that the holder 41 and the packing 42 are formed in a disc spring shape.

That is, the holder 41 has a disc portion 41.
It is formed so that a goes up from the holder fixing surface 33c as it goes from the inner peripheral portion to the outer peripheral portion. The packing 42 is also formed in a dish shape along the disc portion 41a.

In the mounting structure of the seal member constructed as described above, when the male screw shaft 21 is screwed in, the structure shown in FIG.
As shown in FIG. 5, the holder 41 and the packing 42 are bent to a flat state, and the packing 42 is attached to the first seal surface 33b and the second seal surface 33b.
The seal surface 21b and the seal surface 21b are compressed. At this time, since the holder 41 and the packing 42 serve as a disc spring, the female screw forming hole 33 and the male screw shaft 21 are formed.
The fastening state with can be made more solid.

In the third embodiment, either the holder 41 or the packing 42 may be formed in a disc spring shape. However, compared with the case where both the holder 41 and the packing 42 are formed in a disc spring shape, the spring force of the disc spring is reduced.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. However, elements common to the constituent elements of the first embodiment shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be simplified. The fourth embodiment differs from the first embodiment in that the holder fixing surface 33c and the holder 41 are not provided on the female screw forming hole 33 side.

That is, at the bottom of the female screw forming hole 33,
The first seal surface 33b is formed on one surface, and at the end portion of the first seal surface 33b on the side of the through hole 35, the cylindrical portion 3 protruding so as to penetrate the inner peripheral edge portion of the packing 42.
3e is formed. That is, the cylindrical portion 33e is integrally formed with the housing 31 by using aluminum metal. The cylindrical portion 33e is configured such that the upper end portion 33f is bent outward so as to restrain the packing 42 in the axial direction and rotatably hold the packing 42.

In the seal member mounting structure thus constructed, the cylindrical portion 31 is formed by aluminum die casting.
Since the housing 31 having d or the like can be integrally molded, the step of manufacturing the tubular portion 31d can be omitted. Moreover, the number of parts applied to the holder 41 can be reduced, and the holder 41 can be attached to the holder fixing surface 3
Since the step of adhering to 3c can be omitted, the cost can be largely reduced.

Next, referring to FIG. 9, the fifth aspect of the present invention will be described.
An embodiment will be described. However, elements common to the constituent elements of the fourth embodiment shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be simplified. The fifth embodiment is different from the first embodiment in that the housing 31 is integrally molded with resin.

That is, the housing 31 is made of, for example, PP.
It is integrally molded from a synthetic resin of S (polyphenylene sulfite) including the cylindrical portion 31d and the like. Then, by applying heat, the tubular portion 31d is bent outward.

In the mounting structure of the seal member thus constructed, since the housing is molded with resin, the manufacturing efficiency can be further improved and the cost can be reduced.

In each of the above embodiments, the seal member mounting structure is applied to the rotation detecting device. However, the seal member mounting structure has a male screw shaft-like structure at the pressure outlet having the female screw forming hole. It goes without saying that the present invention may be applied to a structural part to which the pressure pickup of (1) is attached or other structural parts similar to these.

[0038]

According to the present invention, the force for twisting the seal member, that is, the shearing force acting on the seal member can be reduced as compared with the case where the seal member is fixed to the first seal surface. It is possible to prevent the seal member from being damaged or deformed. Moreover, since the seal member is rotated by the holder about a certain central axis, a certain portion of the seal member is compressed. Therefore, it is possible to prevent the seal member from being damaged or deformed by being rotated while being eccentric. Further, since the seal member is rotatable with respect to both the first seal surface and the second seal surface, it is of course possible to solve the problem of peeling of the seal member.

When the holder is fixed to the holder fixing surface with an adhesive, the holder can be easily and surely fixed to the holder fixing surface. Further, in the case where the through hole is provided at the bottom of the female screw forming hole and the protrusion piece press-fitted into the through hole is provided in the holder, the holder can be more easily fixed to the holder fixing surface. Then, in the case where the protruding piece is formed by bending the portion cut out from the holder, the protruding piece integrated with the holder and having excellent strength can be obtained. Furthermore, in the case where the holder is configured in the shape of a dish,
Since this holder functions as a disc spring, the female screw forming hole and the male screw shaft can be more firmly fastened. Further, in the case where the seal member is also formed in a dish shape, the seal member also functions as a disc spring and the spring force is increased, so that the connection state between the female screw forming hole and the male screw shaft can be further solidified.

Further, in the case where the holder is provided with a cylindrical portion penetrating the inner peripheral edge of the sealing member and the upper end of the cylindrical portion is bent outward, the sealing member is constrained in the axial direction, Moreover, the holder that rotatably holds the sealing member can be easily formed at low cost.

Further, a through hole is formed so as to penetrate the central portion of the first seal surface, and a cylindrical portion that penetrates the inner peripheral edge portion of the seal member is integrally formed from the end portion of the first seal surface on the through hole side. And the upper end of the tubular portion is bent outward to constrain the seal member in the axial direction and to rotatably hold the seal member, the number of parts required for the holder is reduced. Therefore, the cost can be reduced. In addition, as each of the above-mentioned seal members, in which a seal member such as rubber is integrally provided on both sides of the base plate, the base plate increases rigidity for maintaining a flat surface, and rotates coaxially with the holder. The rigidity for doing so increases. Therefore, the seal member can be prevented from being scratched or deformed, and the sealability can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a seal member mounting structure shown as a first embodiment of the present invention.

FIG. 2 is a sectional view of a seal member mounting structure shown as a second embodiment of the present invention.

FIG. 3 is a plan view showing a holder in the seal member mounting structure.

FIG. 4 is a side view of a main part showing a holder in the mounting structure of the seal member.

FIG. 5 is a perspective view showing a holder in the seal member mounting structure.

FIG. 6 is a sectional view of a seal member mounting structure shown as a third embodiment of the present invention.

FIG. 7 is a sectional view of a seal member mounting structure shown as a fourth embodiment of the present invention.

FIG. 8 is an enlarged cross-sectional view of a main part of the mounting structure of the seal member.

FIG. 9 is a sectional view of the seal member mounting structure shown as the fifth embodiment of the present invention.

FIG. 10 is a cross-sectional view of a seal member mounting structure shown as a conventional example.

[Explanation of reference numerals] 21 male screw shaft 21b second sealing surface 33 female screw forming hole 33b first sealing surface 33c holder fixing surface 33e tubular portion 33f upper end portion 35 through hole 41 holder 41b tubular portion 41c upper end portion 41d protruding piece 42 seal Member (packing) 42a Base plate (base metal plate) 42b Seal body

Claims (9)

[Claims] 1. A hollow disk-shaped seal member is sandwiched between a first seal surface formed at the bottom of the female screw forming hole and a second seal surface formed at the top of the male screw shaft,
A seal member mounting structure for sealing a portion connected by a female screw forming hole and a male screw shaft, the inner peripheral edge portion of the seal member being axially constrained, the seal member being rotatably held, and having an outer diameter. A hollow disk-shaped holder having a smaller diameter than the outer diameter of the sealing member is provided in the female screw forming hole, and only the disk portion of the holder is inserted into the first sealing surface, and the upper surface of the holder is A mounting structure for a seal member, wherein a concave holder fixing surface is formed so as to be flush with the first seal surface. 2. The seal member mounting structure according to claim 1, wherein the holder is fixed to the holder fixing surface with an adhesive. 3. A state in which a through hole penetrating the central portion of the first sealing surface is provided at the bottom of the female thread forming hole, and the holder extends along the through hole and is press-fitted into the through hole. 2. The mounting of the seal member according to claim 1, wherein the holder is fixed to the position of the holder fixing surface by press-fitting the protruding piece into the through hole. Construction. 4. The seal member mounting structure according to claim 3, wherein the projection piece is formed by cutting out a part of the holder and bending the holder along the through hole. 5. The seal member according to claim 3, wherein the holder is formed in a dish shape so as to float from the holder fixing surface as it goes from the inner peripheral portion to the outer peripheral portion. Mounting structure. 6. The mounting structure for a seal member according to claim 5, wherein the seal member is formed in a dish shape along the holder. 7. The holder has a tubular portion that penetrates an inner peripheral edge portion of the seal member, and the upper end portion of the tubular portion is bent outward to constrain the seal member in the axial direction, and at the same time, to seal the seal member. It is adapted to be held rotatably, claim 1, claim 2, claim 3, claim 4,
The seal member mounting structure according to claim 5 or 6. 8. A hollow disk-shaped sealing member is sandwiched between a first sealing surface formed at the bottom of the female screw forming hole and a second sealing surface formed at the top of the male screw shaft,
A sealing member mounting structure for sealing a portion connected by a female screw forming hole and a male screw shaft, wherein a through hole is provided in a bottom portion of the female screw forming hole so as to penetrate a central portion of the first sealing surface. , A cylindrical portion that penetrates the inner peripheral edge portion of the seal member is integrally formed from the end portion of the first sealing surface on the side of the through hole, and the upper end portion of the cylindrical portion is bent outward to move the seal member A seal member mounting structure characterized in that the seal member is rotatably held while being restrained in a direction. 9. The seal member is formed by integrally providing a seal body made of rubber or the like on both sides of a base plate, as claimed in claim 1, claim 2, claim 3, claim 4, claim 4. 5,
The mounting structure for a seal member according to claim 6, 7, or 8.