WO2013176108A1

WO2013176108A1 - Gasket

Info

Publication number: WO2013176108A1
Application number: PCT/JP2013/064024
Authority: WO
Inventors: 克則松木; 賢司濱野; 義彦山口; 宮崎　聡; 貴信荒川; 邦行土井; 三宅　孝志
Original assignee: 内山工業株式会社
Priority date: 2012-05-23
Filing date: 2013-05-21
Publication date: 2013-11-28
Also published as: JP6037543B2; JP2013242025A

Abstract

A gasket (1) that is interposed between two members (20, 30) in a state accommodated in grooves (34-38) formed in one member (30) of said two members (20, 30), and that seals between said two members (20, 30). The gasket (1) is characterized by: comprising a plurality of annular seal parts (2, 3, 4), and connecting parts (5, 6) that connect groups of said annular seal parts (2, 3, 4); and buffer parts (7, 8) being provided to the connecting parts (5, 6), said buffer parts (7, 8) enabling the adjustment of the relative positions of the annular seal parts connected to each other by the connecting parts (5, 6).

Description

gasket

The present invention relates to a gasket that is interposed between two members and seals between the two members, and includes a plurality of annular seal portions, and the annular seal portions are connected to each other.

When a plurality of annular seal target parts exist in the same plane, a single gasket is formed by connecting the annular seal parts for each seal target part (see, for example, Patent Documents 1 to 4). FIG. 6 of Patent Document 1 discloses a seal ring in which an annular portion (annular seal portion) that seals each cylinder in a rocker cover of an automobile engine is connected by a straight portion. Patent Document 2 discloses a gasket in which a plurality of gasket main bodies (annular seal portions) and a connecting portion for connecting these gasket main bodies are integrally molded. Further, FIG. 15 of Patent Document 3 shows an O-ring (annular seal portion) mounted in a seal mounting groove around the housing side cooling water outlet, the housing side cooling water inlet, the housing side oil outlet, and the housing side oil inlet. An integrated O-ring in which adjacent O-rings are connected by a connecting portion is disclosed. Furthermore, in Patent Document 4, an outer peripheral seal portion (annular seal portion) disposed at a joint portion between the outer peripheral wall of the cylinder head and the outer peripheral wall of the cylinder head cover and a mutual joint portion of the plug housing wall are disposed. A cylinder head cover gasket in which a plug seal portion (annular seal portion) is connected is disclosed.

Further, FIG. 5 of Patent Document 5 discloses a gasket in which a plurality of circular portions arranged at equal intervals in the circumferential direction around one gasket main body (annular seal portion) are connected to the gasket main body by a connecting portion. Has been.

Japanese Patent Laid-Open No. 8-246695 Japanese Patent No. 4400759 Japanese Patent No. 4425885 JP 2006-144654 A Japanese Utility Model Publication No. 63-135060

By the way, as described above, a gasket in which a plurality of annular seal portions are connected and integrated by a connecting portion is interposed between the two members in a state of being housed in a predetermined groove formed in the seal target portion. . In this case, a processing tolerance is inevitably generated between the relative position of each annular seal portion and the relative position of each annular groove formed in the seal target portion. Therefore, when the annular seal portions corresponding to the respective annular grooves are fitted and housed, the annular seal portions are in a state in which a tensile force acts in a direction in which the annular seal portions approach each other by the connecting portions, or in directions away from each other. The reaction force is interposed between the two members. In the state in which such a tensile force or reaction force is applied, the internal stress is generated only in the joint portion with the connecting portion in the annular seal portion. Therefore, the seal state is affected in this portion. become. For this reason, the uniform sealing state of the annular seal portion is disturbed, and the sealing performance (function) is affected. Further, since the interposition is performed in a state where internal stress is applied to the joint portion between the annular seal portion and the connecting portion, the internal stress is accumulated in long-term use, and the joint portion is broken. It is also expected that the sealing function will deteriorate.

The plurality of annular portions in the seal ring disclosed in Patent Document 1 seals each cylinder in the rocker cover, but the relative position between the annular portions and the relative position between the grooves into which these annular portions are fitted. No mention is made of the above-mentioned problems caused by deviations and solutions. Patent Document 2 focuses on the fact that a plurality of gasket bodies are easily displaced relatively by bending or twisting due to insufficient strength when the gasket bodies are connected by a string-like connecting portion. And in order to solve this problem, in patent document 2, while providing a bending part in a connection part, this bending part and the expansion part to which the cross-sectional area of the vicinity expands are provided, and a bending part and an expansion part are a gasket main body. It is configured to have bending elasticity that allows relative displacement. However, although the bent part and the enlarged part have bending elasticity, when the gasket body is positioned with this bending elasticity, stress is also accumulated at the joint between the gasket body and the connecting part, which is the sealing function. It may also affect the In particular, the portion having bending elasticity is an enlarged portion having an enlarged cross-sectional area. Thus, when positioning is performed with bending elasticity of a portion having a large cross-sectional area, It is sufficiently expected that a large stress is accumulated in the joint portion.

Further, the integrated O-ring disclosed in Patent Document 3 seals the inlet and outlet of cooling water and the inlet and outlet of oil in the housing, respectively, and adjacent O-rings are connected by a connecting portion. Yes. However, also in this patent document 3, like the patent document 1, the said problem and the solution by the shift | offset | difference of the relative position of each O-ring and the relative position between the groove | channel which these fit are mentioned. Absent. In the gasket disclosed in Patent Document 4, two kinds of annular seal portions (peripheral seal portion and plug seal portion) each include a connecting piece, and the cylinder head and the cylinder head cover are joined in a state where the connecting pieces are connected to each other. It is inserted in the part. Also in this case, the above-mentioned problem and the solution due to the deviation between the relative position of each seal portion and the relative position between the grooves into which they are fitted are not mentioned. And the several circular part arrange | positioned in the circumference direction at equal intervals around the periphery of one gasket main body in patent document 5 is either of the groove wall with respect to the circular groove formed in to-be-attached members, such as a cylinder head. The gasket main body is positioned at a predetermined position by being mounted in a pressure contact state. However, what corresponds to the annular seal portion is only one gasket body, and the plurality of circular portions are not involved in the sealing function, and the gasket is constituted by connecting the plurality of annular seal portions by the connecting portions. Is structurally different.

The present invention has been made in view of the above, and is a gasket in which a plurality of annular seal portions are connected and integrated with each other by a connecting portion, and has a simple configuration and has a predetermined configuration without affecting the sealing performance. An object of the present invention is to provide a gasket that can be easily attached to a site to be sealed.

A gasket according to the present invention is a gasket that is interposed between two members in a state of being accommodated in a groove formed in one member of the two members, and seals between the two members. And a connecting portion for connecting the annular seal portions to each other, and the connecting portion is provided with a buffer portion capable of adjusting a relative position of the annular seal portions connected to each other by the connecting portion. And gasket.

According to this, since the plurality of annular seal portions are connected by the connecting portion, it can be handled as a single gasket, and the assembly work stored in the groove can be made more efficient. Moreover, it can manufacture efficiently as one gasket which bundles the some annular seal part applied to a some seal | sticker object site | part. Since the buffer portion is provided in the connecting portion, a shift between the relative position of the annular seal portions connected to each other of the gasket and the relative position of the groove that accommodates these annular seal portions occurs due to processing tolerances or the like. In addition, the gasket is adjusted by the action of the buffer portion, so that the gasket is properly stored in the groove. And since the shift | offset | difference of these relative positions is received and adjusted flexibly by the buffer part in this way, the internal stress which arises in a junction part with a connection part can be made small in an annular seal part, and it exerts on an annular seal part. The influence can be reduced. Further, since the connecting portion does not directly relate to the sealing performance, there is no concern that the sealing performance due to the annular sealing portion is lowered even if a buffer portion is present in the connecting portion.

In the gasket according to the present invention, the buffer portion may be a bent shape portion or a wavy shape portion. According to this, since the buffer action is exhibited by opening and closing deformation of the bent shape portion or the waveform shape portion, the internal stress generated in the joint portion with the connecting portion can be reduced in the annular seal portion. In addition, a gasket including these buffer portions can be easily manufactured.

In the gasket according to the present invention, an alignment portion is formed in the groove, and the connecting portion between the buffer portion and the annular seal portion is provided with a deformed portion having a shape that matches the alignment portion. It is good as a thing.
According to this, since the connecting portion includes the deformed portion having a shape that matches the alignment portion formed in the groove, when the gasket is housed in the groove, the deformed portion is aligned with the alignment portion. The plurality of annular seal portions are correctly stored in the respective normal positions of the groove. As described above, since the position of the annular seal portion can be determined with priority, distortion due to positioning can be absorbed by position adjustment by the buffer portion, and a better sealing function can be obtained.

In the gasket according to the present invention, an alignment portion may be formed in the groove, and a deformed portion having a shape matching the alignment portion may be provided at a joint portion of the coupling portion with the annular seal portion. good.
According to this, since the alignment is performed at the joint portion between the connecting portion and the annular seal portion, the position of the annular seal portion can be determined more preferentially and accurately. In addition, almost all of the distortion caused by this is absorbed by the buffer portion, and a better sealing function can be obtained.

According to the gasket of the present invention, since the plurality of annular seal portions are connected and integrated by the connecting portion, the assembling work to be interposed between the two members is efficiently performed. And although it is simple structure, an annular seal part can be assembled | attached to a predetermined seal | sticker object site | part without a great influence, without affecting sealing performance by presence of a buffer part.

It is sectional drawing of the principal part which showed the state which interposes the gasket which concerns on the 1st Embodiment of this invention between two members to be sealed, and seals between the two members. FIG. 2 is a cross-sectional view taken along line AA in FIG. It is the same figure as FIG. 2 which shows the modification of the gasket of the embodiment. It is a figure similar to FIG. 2 which shows the gasket which concerns on the 2nd Embodiment of this invention. It is a figure similar to FIG. 2 which shows the gasket which concerns on the 3rd Embodiment of this invention. (A)-(d) is a figure which shows the various examples of the other form of the cross-sectional shape corresponding to FIG. 1 in the gasket of this invention. (A)-(e) is sectional drawing which shows the various shapes of the BB arrow directional part in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a gasket according to a first embodiment of the present invention. The gasket 1 of the present embodiment is a gasket that is interposed between two

members

20 and 30 and seals between the two

members

20 and 30. The two

members

20 and 30 in the illustrated example are composed of a cylinder block 20 of an engine and an oil cooler 30 combined with the cylinder block 20 by fastening. However, the present invention is not limited to this, as long as it has a plurality of seal target parts, a gasket is interposed between the two parts, and the gasket 1 is configured to be sealed between the two. These two members may be sufficient. The gasket 1 includes a plurality (three in the illustrated example) of

annular seal portions

2, 3, and 4, and connecting

portions

5 and 6 that connect the

annular seal portions

2 and 3 and the

annular seal portions

2 and 4, respectively. including. The gasket 1 of the present embodiment including the

annular seal portions

2, 3, 4 and the connecting

portions

5, 6 is constituted by an integrally molded body made of a rubber material. In the middle of the connecting

portions

5 and 6,

buffer portions

7 and 8 to be described later are formed.

The cylinder block 20 is formed with a cooling water (antifreeze) distribution bore 21 and two oil distribution bores 22 (one not shown). On the other hand, the oil cooler 30 is formed with cooling water circulation bores 31 and oil circulation bores 32 and 33 at positions corresponding to the bores of the cylinder block 20. Then, on the surface on the cylinder block 20 side around the

bores

31, 32, 33 on the oil cooler 30 side, annular concave grooves (grooves) 34, 35, 36 into which the

annular seal portions

2, 3, 4 are fitted are provided. Is formed. Further, a straight connecting groove (groove) 37 communicating with both

annular grooves

34, 35 is formed between the

annular grooves

34, 35, and both

annular grooves

34, 36 are disposed between the

annular grooves

34, 36. A straight connection concave groove (groove) 38 that communicates with each other is formed. The groove depth of the connecting

concave grooves

37 and 38 is formed shallower than the groove depth of the annular

concave grooves

34, 35 and 36.

The annular seal portion 2 is received by being fitted into the annular groove 34 formed around the cooling water circulation bore 31 of the oil cooler 30. The

annular seal portions

3 and 4 are fitted into and accommodated in the annular

concave grooves

35 and 36 formed around the oil circulation bores 32 and 33 of the oil cooler 30, respectively. Further, the connecting

portions

5 and 7 are accommodated in the connecting

concave grooves

37 and 38, respectively.

Recesses

37a and 38a that are substantially rectangular in a plan view are formed in one-side groove walls at positions substantially corresponding to the

buffer portions

7 and 8 in the longitudinal direction in the connecting

grooves

37 and 38, respectively. . By the

concave portions

37a and 38a, widening spaces 37a0 and 38a0 are formed in which the groove widths of the connecting

concave grooves

37 and 38 are increased.

In the present embodiment, the

buffer portions

7 and 8 formed in the middle of the connecting

portions

5 and 6 are mountain-shaped in plan view, and the width direction of the connecting portions 5 and 6 (grooves of the connecting concave grooves 37 and 38). It consists of bent-shaped

portions

7a and 8a bent so as to protrude to one side in the width direction). Since the

annular seal portions

2, 3, 4 and the connecting

portions

5, 6 are formed of a molded body made of a rubber material, and the

buffer portions

7, 8 are bent portions made of a material having elastic characteristics, the

buffer portions

7, 8 Is easily deformed in the direction indicated by the arrow a. As a result, when a tensile force or reaction force along the longitudinal direction is applied to the connecting

portions

5 and 6, the

buffer portions

7 and 8, that is, the

bent portions

7a and 8a behave so as to open and close along the arrow b direction. To do. Therefore, the

recesses

37a and 38a formed in the connecting

recess grooves

37 and 38 are formed so that the widening spaces 37a0 and 38a0 formed so that the groove width is expanded by the

recesses

37a and 38a are It is formed to have a size that allows the above behavior in the a direction and the b direction.
In this embodiment, the

bent shape portions

7a and 8a of the

buffer portions

7 and 8 may have a mountain shape protruding in the groove bottom direction of the connecting

concave grooves

37 and 38. In this case, the

concave portions

37a and 38a are formed at the groove bottom portions of the connecting

concave grooves

37 and 38.

The gasket 1 configured as described above is disposed between the cylinder block 20 and the oil cooler 30 in a state of being accommodated in the annular

concave grooves

34, 35, 36 formed in the oil cooler 30 and the coupling

concave grooves

37, 38. It is used to seal between the cylinder block 20 and the oil cooler 30. That is, the

annular seal portions

2, 3, and 4 are fitted in the annular

concave grooves

34, 35, and 36 of the oil cooler 30, and the

coupling portions

5 and 6 are fitted in the coupling

concave grooves

37 and 38, respectively. When the connecting

portions

5 and 6 are fitted into the connecting

concave grooves

37 and 38, the

buffer portions

7 and 8 are aligned with the widened spaces 37a0 and 38a0 by the

concave portions

37a and 38a of the connecting

concave grooves

37 and 38. Positioned to do. By the way, as described above, a processing tolerance is inevitably generated between the relative positions of the

annular seal portions

2, 3, 4 and the relative positions of the corresponding annular

concave grooves

34, 35, 36. Further, a processing tolerance is generated between the length of the connecting

portions

5 and 6 and the length of the connecting

concave grooves

37 and 38 corresponding to the connecting

portions

5 and 6, respectively. Therefore, when there is such a processing tolerance, a tensile force or a reaction force along the longitudinal direction acts on the connecting

portions

5 and 6 during the fitting. However, most of the tensile force or reaction force is absorbed by the behavior of the

buffer portions

7 and 8 in the a and b directions. Therefore, the

annular seal portions

2, 3, and 4 are fitted into the annular

concave grooves

34, 35, and 36 without difficulty and accurately. Further, the internal stress applied to the

joint portions

5a and 5b of the connecting portion 5 with the

annular seal portions

2 and 3 and the

joint portions

6a and 6b of the joint portion 6 with the

annular seal portions

2 and 4 is reduced. As a result, even if the fastening state between the cylinder block 20 and the oil cooler 30 to be described later is maintained for a long time, internal stress is not accumulated in the

joint portions

5a, 5b, 6a, and 6b, and a breakage occurs at these portions. It becomes difficult to occur, and the predetermined sealing function of the

annular seal portions

2, 3 and 4 is maintained.

The cylinder block 20 and the oil cooler 30 in which the gasket 1 is housed by fitting as described above are combined, and the cylinder block 20 and the oil cooler 30 are fastened with bolts (not shown) or the like. The

annular seal portions

2, 3 and 4 in the figure have an oval cross section and are formed so that the major axis thereof faces the fastening direction (the depth direction of the

annular grooves

34, 35 and 36). And in the said fastening, the dimension of each long diameter in the cross section of the cyclic | annular seal |

sticker parts

2, 3, and 4 is set so that it may compress between the cylinder block 20 and each cyclic | annular

concave groove

34,35,36. Moreover, the dimension of the short diameter of the

annular seal portions

2, 3, 4 is set smaller than the groove width dimension of each of the annular

concave grooves

34, 35, 36. FIG. 1 shows that the cylinder block 20 and the oil cooler 30 are in a predetermined fastening state. A two-dot chain line in FIG. 1 indicates the original shape of the

annular seal portions

2 and 3, and in this fastening state, the

annular seal portions

2 and 3 are compressed, and the annular

concave grooves

34 and 35 are formed as indicated by solid lines. It is in a state of being elastically deformed so as to be almost satisfied. In addition, the width dimension of the connecting portion 5 is smaller than the groove width dimension of the connecting recess groove 37, and the thickness is a dimension that is not compressed between the cylinder block 20 and the connecting recess groove 37 in the predetermined fastening state. Is set. In FIG. 1, the annular seal portion 4, the annular concave groove 36, the coupling portion 6, and the coupling concave groove 38 do not appear, but their dimensional relationships and the like are similarly set.

In addition to the function of the buffer portion described above, in the fastening state of the cylinder block 20 and the oil cooler 30 as described above, the

annular seal portions

2, 3, and 4 are compressed around the respective bores as the seal target portions. Since they are interposed, these parts to be sealed are sealed. Moreover, since the

connection parts

5 and 6 do not participate in the sealing function of the gasket 1 and are configured not to be compressed in the fastening state, the sealing function is exhibited by the compression of the

annular seal parts

2, 3 and 4. The long-term sealing function of the gasket 1 is maintained well. Furthermore, since the three

annular seal portions

2, 3, and 4 are connected and integrated by the connecting

portions

5 and 6, they are superior in storage and transportability compared to the case where these are individually manufactured, and Assembling work with respect to the cylinder block 20 and the oil cooler 30 is efficiently performed.

FIG. 3 shows a modification of the first embodiment. This example is different from the example shown in FIG. 2 in that the

buffer parts

7 and 8 are formed by

waveform shape parts

7b and 8b. That is, the

corrugated portions

7b and 8b are formed in two ridges in plan view, and the ridges protrude in both the width directions of the connecting portions 5 and 6 (the groove width directions of the connecting concave grooves 37 and 38). It is formed continuously. A pair of

recesses

37b and 38b are formed in each groove wall at portions corresponding to the

buffer portions

7 and 8 of the connecting

recess grooves

37 and 38, respectively. In the case of this example, the

buffer parts

7 and 8 are easily deformed in the direction indicated by the arrow a as in the above example, and this causes a tensile force or a reaction force along the longitudinal direction to act on the connecting

parts

5 and 6. The

buffer portions

7 and 8, that is, the

waveform shape portions

7b and 8b behave so as to open and close along the arrow b direction. However, since each

waveform shape part

7b, 8b consists of two chevrons which are opposite to each other, the deformation in the direction of arrow a is added, and the behavior in the direction of arrow b is greater than in the example shown in FIG. Expressed. Therefore, each of the pair of

recesses

37b and 38b formed in the connecting

recess grooves

37 and 38 has the widened spaces 37b0 and 38b0 formed by the

recesses

37b and 38b, respectively, in the a direction and b of the

buffer portions

7 and 8. It is formed to have a size that allows the behavior in the direction. In this example, since the behavior in the b direction of the

buffer parts

7 and 8 is larger than the example shown in FIG. 2, the absorbability when the tensile force or reaction force along the longitudinal direction acts on the connecting

parts

5 and 6. The fitting of the

annular seal portions

2, 3, 4 into the respective annular

concave grooves

34, 35, 36 is made more reasonably and accurately.
Since the other configuration is the same as that of the example shown in FIG. 2, the same reference numerals are given to common portions, and the description thereof is omitted.

FIG. 4 is a view similar to FIG. 2 showing a gasket according to the second embodiment of the present invention. The gasket 1A of this embodiment also includes the same three

annular seal portions

2, 3, 4 as described above, a connecting portion 5 that connects the

annular seal portions

2, 3, and a connecting portion that connects the

annular seal portions

2, 4. 6 is provided. The

annular seal portions

2, 3, 4 and the connecting

portions

5, 6 are respectively fitted into the annular

concave grooves

34, 35, 36 and the connecting

concave grooves

37, 38 formed in the oil cooler 30 as described above. Further, in the middle of the connecting

portions

5 and 6,

buffer portions

7 and 8 similar to the example shown in FIG. 2 are formed, and in the portions corresponding to the

buffer portions

7 and 8 in the connecting

concave grooves

37 and 38, Widened spaces 37a0 and 38a0 are formed by the

recesses

37a and 38a. In this embodiment, two

alignment portions

37c and 37d are formed in the connecting groove 37, and two

alignment portions

38c and 38d are formed in the connecting groove 38, respectively. In the connecting portion 5 between the buffer portion 7 and the

annular seal portions

2 and 3,

deformed portions

9 and 10 having a shape matching the

alignment portions

37c and 37d are formed. Further, the connecting portion 6 between the buffer portion 8 and the

annular seal portions

2 and 4 is formed with

deformed portions

11 and 12 having a shape matching the

alignment portions

38c and 38d. In the illustrated example, the

alignment portions

37c and 37d and the

alignment portions

38c and 38d are formed of concave portions formed in both groove walls of the connecting

concave grooves

37 and 38, and the

deformed portions

9 and 10 and the deformed portion 11 are formed. , 12 are convex portions projecting from both side portions of the connecting

portions

5, 6. The concavo-convex relationship between the alignment portion and the deformed portion may be opposite to that in the illustrated example, and is provided on one side groove walls of the connection

concave grooves

37 and 38 and one side portion of the

connection portions

5 and 6. It may be a thing.

When fitting the gasket 1A shown in FIG. 4 into the annular

concave grooves

34, 35, 36 and the connecting

concave grooves

37, 38, first, the

deformed portions

9, 10 and the

deformed portions

11, 12 are moved to the position. Alignment is performed with the

alignment portions

37c and 37d and the

alignment portions

38c and 38d. As a result, the

annular seal portions

2, 3, 4 are correctly stored in the respective normal positions of the

annular grooves

34, 35, 36. Thus, since the positions of the

annular seal portions

2, 3 and 4 can be determined with priority, the tensile force and reaction force due to processing tolerances at the connecting

portions

5 and 6 are determined by the positioning portions and the deformed portions. It will occur between the parts. Therefore, since the distortion due to positioning can be absorbed by the behavior of the

buffer portions

7 and 8, internal stress is generated in the

joint portions

5a and 5b in the connecting portion 5 and the

joint portions

6a and 6b in the connecting portion 6. It becomes difficult to do. As a result, there is little fear of causing breakage of the joint portion even in long-term use, and the sealing function by the

annular seal portions

2, 3, 4 is maintained well.
In this example as well, the

buffer portions

7 and 8 can be of the waveform shape shown in FIG. Since the other configuration is the same as that of the first embodiment, the same reference numerals are given to the common parts and the description thereof is omitted here.

FIG. 5 is a view similar to FIG. 2 showing a gasket according to the third embodiment of the present invention. Similarly to the gasket 1A (second embodiment) shown in FIG. 4, the gasket 1B of this embodiment also includes an alignment portion and a deformed portion in the connecting

concave grooves

37 and 38 and the connecting

portions

5 and 6. This is different from the gasket 1 of the first embodiment. However, the position where the alignment portion and the deformed portion are formed is different from that of the second embodiment. That is, in the gasket 1B of the present embodiment, two

alignment portions

37e and 37f are formed at the joining portion of the connecting groove 37 and the

annular grooves

34 and 35, and the connecting groove 38 and the

annular grooves

34 and 36 are joined. Two

alignment portions

38e and 38f are respectively formed at the joining portion. In the

joint portions

5a and 5b with the

annular seal portions

2 and 3 in the connecting portion 5,

deformed portions

13 and 14 respectively aligned with the

alignment portions

37e and 37f are formed. In addition,

deformed portions

15 and 16 that are respectively aligned with the

alignment portions

38e and 38f are formed in the

joint portions

6a and 6b of the coupling portion 6 with the

annular seal portions

2 and 4, respectively. In the illustrated example, the

alignment portions

37e and 37f and the

alignment portions

38e and 38f are formed of concave portions formed in both groove walls of the connecting

concave grooves

37 and 38, and the

deformed portions

13 and 14 and the deformed portion 15 are formed. , 16 are convex portions projecting from both side portions of the connecting

portions

concave grooves

37 and 38 and one side portion of the

connection portions

5 and 6. The thing which may be a thing is the same as that of 2nd Embodiment.

In the gasket 1B shown in FIG. 5, first, the

deformed portions

13 and 14 and the

deformed portions

15 and 16 are aligned with the

alignment portions

37e and 37f and the

alignment portions

38e and 38f, and then the annular groove 34 is formed. , 35, 36 and the connecting

concave grooves

37, 38 are stored. As a result, the

annular seal portions

2, 3, 4 are correctly stored in the respective normal positions of the

annular grooves

34, 35, 36. Thus, since the positions of the

annular seal portions

2, 3 and 4 can be determined with priority, the tensile force and reaction force due to processing tolerances in the connecting

portions

5 and 6 are the same as in the second embodiment. This occurs between the positioning portions by the respective alignment portions and the deformed portions. In this case, since the alignment is performed at the

joint portions

5a, 5b, 6a, 6b between the connecting

portions

5, 6 and the

annular seal portions

2, 3, 4, the positions of the

annular seal portions

2, 3, 4 are more preferential. It can be determined accurately. In addition, almost all of the strain due to the tensile force and reaction force is absorbed by the

buffer portions

7 and 8, and the

joint portions

5 a and 5 b in the connecting portion 5 and the

joint portions

6 a and 6 b in the connecting portion 6. Internal stress is less likely to occur. Thereby, even in long-term use, the uniform sealing state of the

annular seal portions

2, 3 and 4 is not disturbed. The sealing function by 4 is better maintained.
In this example as well, the

buffer portions

7 and 8 can be of the waveform shape shown in FIG. Since other configurations are the same as those of the first and second embodiments, the same reference numerals are given to the common portions, and the description thereof is omitted.

6 (a) to 6 (d) are views showing examples of other forms of the cross-sectional shape corresponding to FIG. 1 of the gasket of the present invention. These show various forms of the cross-sectional shape of the annular seal portion and various aspects of the connection position between the annular seal portion and the connection portion, and are applied to any of the first to third embodiments. It is. (A) In the example shown in the figure, the cross-sectional shape of the

annular seal portions

2 and 3 is substantially circular, and the connecting portion 5 is in the fastening direction of the cylinder block 20 and the oil cooler 30 with respect to the

annular seal portions

2 and 3. Are connected at a substantially intermediate position. Further, in the examples shown in FIGS. (B), (c), and (d), the cross-sectional shape of the

annular seal portions

2 and 3 is substantially rectangular, and the long sides thereof are formed so as to face the fastening direction. And in the example shown to (b) figure, the connection part 5 is connected with the

annular seal parts

2 and 3 in the substantially intermediate position of the said fastening direction of the said cylinder block 20 and the oil cooler 30. As shown in FIG. Further, in the example shown in FIG. (C), the connecting portion 5 is connected to the upper position in the fastening direction with respect to the annular seal portions 2 and 3 (the bottom side position of the annular grooves 34 and 35). Yes. Further, in the example shown in FIG. 4 (d), the connecting portion 5 is connected to the lower position in the fastening direction with respect to the annular seal portions 2 and 3 (opening side position of the annular grooves 34 and 35). ing. These various forms are appropriately selected and adopted in consideration of product specifications, ease of molding, and the like.
In addition, the cross-sectional shape of the annular seal portion is not limited to these examples, and may be, for example, a vertically or asymmetrical shape. Although the sectional shape of the annular seal portion is not shown in the drawing, it goes without saying that a similar shape can be adopted.

7A to 7E are cross-sectional views showing various shapes of the BB line arrow portion in FIG. 2, and are applied to any of the first to third embodiments. is there. These examples show examples of shapes that the cross-sectional shape of each connecting portion can take. Since the connecting portion is a portion not related to the sealing function of the gasket of the present invention, these shapes are appropriately selected in consideration of the connecting strength, the ease of molding, the handleability, and the like rather than the sealing performance.

In each of the above-described embodiments, the cylinder block 20 and the oil cooler 30 are taken as examples of the two members. However, the present invention is not limited to this, and the present invention is also applicable to other members having a plurality of seal target portions. Is done. In this case, the number of sites to be sealed is not limited to three as shown in the figure, but may be two or four or more. Moreover, although the example which the material which comprises a gasket is a rubber material was described, various elastomers containing a soft synthetic resin etc. may be sufficient. Furthermore, the

buffer portions

7 and 8 are not limited to the bent shape portion and the waveform shape portion as shown in the figure, but may be made by applying a material having a buffer action as described above from the constituent materials of the

connection portions

5 and 6. In addition, it is possible to use a material that provides buffering properties. Further, the shape of the

recesses

37a and 38a is not limited to the square shape as shown in the figure, but may be a trapezoidal shape (tapered shape with opposing side portions inclined). In addition, the shapes of the deformed portion and the alignment portion are not limited to those in the illustrated example, and other shapes are possible as well, and the concave and convex shapes of both can be formed along the depth direction of the connecting groove. is there.

1, 1A, 1B Gasket 20 Cylinder block (the other of the two members)
30 Oil cooler (one of two members)
34, 35, 36 Annular grooves (grooves)
37,38 Connecting groove (groove)
2, 3, 4

Annular seal portion

5, 6

Connection portion

5a,

5b Joint portion

6a,

6b Joint portion

7, 8

Buffer portion

7a, 8a

Bent shape portion

7b, 8b Waveform shape portion 9-16 Deformed portion 37c-37f Positioning 38c to

38f Positioning part

37e,

37f Positioning part

38e, 38f Positioning part

Claims

In a gasket that is interposed between the two members in a state of being housed in a groove formed in one member of the two members and seals between the two members,
Including a plurality of annular seal portions and a connecting portion for connecting the annular seal portions to each other;
The gasket is characterized in that the connecting portion is provided with a buffer portion capable of adjusting the relative position of the annular seal portions connected to each other by the connecting portion.
The gasket according to claim 1,
The gasket is characterized in that the buffer portion comprises a bent portion.
The gasket according to claim 1,
The gasket is characterized in that the buffer portion comprises a wave shape portion.
The gasket according to any one of claims 1 to 3,
The gasket is characterized in that an alignment portion is formed in the groove, and a deformed portion having a shape matching the alignment portion is provided in the connecting portion between the buffer portion and the annular seal portion.
The gasket according to any one of claims 1 to 3,
The gasket is characterized in that an alignment portion is formed in the groove, and a deformed portion having a shape matching the alignment portion is provided at a joint portion of the connecting portion with the annular seal portion.