JP6843705B2 - Gasket and engine - Google Patents

Description

The present invention relates to a gasket to which a liquid gasket is used in combination and an engine sealed by the gasket.

Conventionally, in an engine such as an automobile, a gasket that seals between a plurality of members constituting the engine has been used in order to prevent leakage of oil or the like. The gasket is formed of, for example, an elastic material such as rubber, is inserted into a groove formed in one of the two members, and is interposed between the gasket and the other member. This gasket is elastically deformed between the two members, and a reaction force is generated for each member to seal between the two members.

By the way, for example, in the case of an engine having a configuration in which a head cover is provided above a cylinder head and a chain cover, a portion where each surface of the three members is aligned (hereinafter, this portion is referred to as a "three-surface mating portion"). is there. A step may be formed in the three-sided mating portion due to a dimensional error of each member or the like. Therefore, when the three members are sealed with a rubber gasket, a gap is created between the gasket and the member due to this step, and the gasket does not generate a reaction force against the member. In order to improve the sealing performance of the three-faced mating portion, a method of using a liquid gasket (for example, FIPG (Formed In Place Gasket)) in combination with the region including the three-faced mating portion is known.

For example, Patent Document 1 discloses a gasket that seals between a head cover, a chain cover, and a cylinder head. This gasket has a body portion mounted in a groove provided in the head cover, a flat plate portion provided on one end side of the body portion, and a boundary portion of three members on a surface of the flat plate portion opposite to the body portion. It is provided with a liquid seal holding portion provided in the including area. The liquid seal holding portion is composed of a plurality of convex portions and a plurality of concave portions, and the plurality of convex portions are provided in a grid pattern diagonally with respect to the longitudinal direction of the gasket to form a mesh shape. The liquid seal holding portion having such a shape is filled with a liquid seal (liquid gasket).

JP-A-2007-24210

However, in the technique disclosed in Patent Document 1, since the liquid seal holding portion is formed on the lower surface of the flat plate portion with a width of about the width of the body portion, a large filling amount of the liquid gasket cannot be secured and the sealing performance is sufficient. May not be obtained. For example, when the engine operates, heat is generated, so that the above-mentioned three members each thermally expand, and the step may change due to the difference in thermal expansion between the three members. Even in such a case, in order to ensure the sealing performance, it is necessary for the liquid gasket to follow the change of the step. However, if the filling amount of the liquid gasket is small, the change cannot be followed and the sealing performance may deteriorate.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a gasket and an engine capable of improving the sealing performance by a liquid gasket.

The gasket according to the present invention is a gasket formed of an elastic material, extending between the members to be sealed, and filling at least a part of the region in the extending direction with a liquid gasket, which is interposed between the members to be sealed. A main body portion to be formed and a flat plate portion provided on the side surface of the main body portion along the extending direction are provided, and the flat plate portion is arranged in a region where the liquid gasket is filled in the extending direction and is filled with the liquid gasket. It is characterized in that a hole to be opened is formed on the surface on the side to be opened.

In the gasket according to the present invention, a hole is formed in the flat plate portion in the region where the liquid gasket is filled. By filling the liquid gasket between the flat plate portion and one of the members to be sealed in the area including this hole, the liquid gasket can be stored on the outside of the main body portion, so that the amount of the liquid gasket can be increased. Can be done. By increasing the amount of the liquid gasket, the followability of the liquid gasket can be improved. Further, when the liquid gasket is inserted into the hole formed in the flat plate portion and cured, the holding force against the liquid gasket filled on the outside of the main body portion can be improved. As a result, according to the gasket according to the present invention, the sealing performance of the liquid gasket can be improved.

In the gasket according to the present invention, the hole is preferably a through hole penetrating the flat plate portion. With this configuration, air can be supplied to the liquid gasket filled between the flat plate portion and one of the members to be sealed on the outside of the main body portion through the through hole. The moisture in the supplied air promotes the curing of the liquid gasket, and the curing time of the liquid gasket can be shortened.

In the gasket according to the present invention, it is preferable that the flat plate portions are provided on both side surfaces of the main body portion, and holes are formed in the flat plate portion provided on one side surface and the flat plate portion provided on the other side surface, respectively. With this configuration, the liquid gaskets can be held on both sides of the main body, so that the amount of the liquid gasket can be increased and the sealing performance of the liquid gasket can be improved.

In the gasket according to the present invention, it is preferable that a plurality of holes are provided at intervals in the extending direction. By entering the liquid gasket into each of the plurality of holes and curing the liquid gasket, it is possible to improve the holding force against the liquid gasket filled on the outside of the main body.

In the gasket according to the present invention, it is preferable that the gasket is provided at the end of the main body on the side where the liquid gasket is filled, and is provided with a liquid gasket holding portion for holding the liquid gasket. The liquid gasket holding portion provided at the end of the main body and the flat plate on the outside of the main body and one of the members to be sealed are filled with the liquid gasket and cured to improve the sealing performance of the liquid gasket. It can be improved further.

In the gasket according to the present invention, the region filled with the liquid gasket preferably includes a portion where the three members to be sealed are combined. Even if there is a step in the three-faced mating portion of the three members to be sealed, the area including the three-faced mating portion can be sealed by the liquid gasket. In particular, a large amount of liquid gasket can follow the change of the step, and the sealing property can be ensured.

The engine according to the present invention is an engine in which three members to be sealed are sealed by a gasket in which a liquid gasket is used in combination. The gasket is a gasket having the above-described configuration, and the liquid gasket is in the extending direction. It is characterized in that it is held between the flat plate portion and one of the members to be sealed in the region including the hole in the above. According to the engine according to the present invention, by using the gasket having the above-described configuration, the sealing performance by the liquid gasket used in combination can be improved.

According to the present invention, it is possible to improve the sealing performance of the liquid gasket.

It is a side view which shows typically the three members to be sealed of the gasket and the engine which concerns on 1st Embodiment. It is sectional drawing along the line II-II shown in FIG. It is a bottom view around the liquid gasket holding part of the gasket which concerns on 1st Embodiment. It is a side view around the liquid gasket holding part of the gasket which concerns on 1st Embodiment. It is sectional drawing of the gasket which concerns on 2nd Embodiment. It is sectional drawing which shows the other example of the through hole formed in the flat plate part of a gasket.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the figure, the same reference numerals are used for the same or corresponding parts. Further, in each figure, the same elements are designated by the same reference numerals, and duplicate description will be omitted.

(First Embodiment)
The gasket 1 according to the first embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is a side view schematically showing three sealed members 5, 6 and 7 of the gasket 1 and the engine 4 according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG. FIG. 3 is a bottom view of the vicinity of the liquid gasket holding portions 12 and 15 of the gasket 1 according to the first embodiment. FIG. 4 is a side view of the vicinity of the liquid gasket holding portions 12 and 15 of the gasket 1 according to the first embodiment. In FIGS. 2 to 4, the liquid gasket 3 is shown by a dot pattern.

The gasket 1 is used in an automobile engine 4 and is provided between three sealed members of the engine 4. The gasket 1 is mounted between the cylinder head 5 and the chain cover 6 and the head cover 7, for example, and extends along the lower end portion of the peripheral wall of the head cover 7 (the upper end portion of the cylinder head 5 and the chain cover 6). As shown in FIG. 4 and the like, a part of the region in the direction D1 in which the gasket 1 extends is filled with the liquid gasket 3. The liquid gasket 3 is filled in, for example, a region (two places) including a three-sided mating portion 8 to which the cylinder head 5, the chain cover 6 and the head cover 7 are aligned.

The chain cover 6 is fixed to the side of the cylinder head 5 by bolting or the like. The head cover 7 is fixed to the upper parts of the chain cover 6 and the cylinder head 5 by bolting or the like. As shown in FIG. 2, a groove 7b is formed on the lower surface 7a of the peripheral wall of the head cover 7 for mounting the gasket 1.

The gasket 1 is formed of an elastic material, for example, of rubber. The gasket 1 is formed in an annular shape corresponding to the shape of the lower end portion of the peripheral wall of the head cover 7 (the upper end portion of the peripheral wall of the chain cover 6 and the cylinder head 5). The gasket 1 includes a main body portion 10, a pair of flat plate portions 11, a liquid gasket holding portion 12, and a plurality of rib portions 13, and holes 14 are formed in each of the flat plate portions 11.

The main body portion 10 is a portion that is elastically deformed to seal between the cylinder head 5, the chain cover 6, and the head cover 7. The main body 10 is interposed between the cylinder head 5, the chain cover 6, and the head cover 7, and most of the main body 10 is inserted into the groove 7b of the head cover 7. The main body 10 is formed in an annular shape. As shown in FIG. 2, the cross-sectional shape of the main body 10 is such that the upper end (the end on the side inserted into the groove 7b) is substantially semicircular and the lower end thereof is substantially rectangular. The height of the main body 10 is a predetermined amount higher than the depth of the groove 7b of the head cover 7. The width of the main body 10 is slightly narrower than the width of the groove 7b of the head cover 7.

The pair of flat plate portions 11 are portions for externally confirming whether or not the gasket 1 is attached. When the main body portion 10 is inserted into the groove 7b, the flat plate portion 11 is interposed between the upper surface 5a of the peripheral wall of the cylinder head 5 and the upper surface 6a of the peripheral wall of the chain cover 6 and the lower surface 7a of the peripheral wall of the head cover 7. The flat plate portion 11 is provided on each side surface 10a, 10a of the main body portion 10 along the extending direction D1 of the gasket 1. The flat plate portion 11 is provided substantially perpendicular to the side surface 10a and projects from the side surface 10a. The flat plate portion 11 is formed in a flat plate shape having a predetermined thickness. The flat plate portion 11 is arranged on the side surface 10a of the main body portion 10 at a predetermined portion (particularly, a portion at a predetermined distance from the lower end portion 10b of the main body portion 10) where the main body portion 10 protrudes from the groove 7b. As shown in FIG. 2, the width of the flat plate portion 11 is substantially the same as the length from the side surface 10a of the main body portion 10 to the outer peripheral surface 7d of the peripheral wall of the head cover 7.

The liquid gasket holding portion 12 is a portion that holds the liquid gasket 3 at the lower end portion 10b of the main body portion 10. The liquid gasket holding portion 12 is provided at the lower end portion 10b (bottom surface) of the main body portion 10 in a region (a region including the three-sided mating portion 8) where the liquid gasket 3 is filled in the extending direction D1. As shown in FIG. 3, for example, the liquid gasket holding portion 12 is composed of a plurality of convex portions 12a, each convex portion 12a is formed in a substantially × shape, and the plurality of convex portions are in the extending direction D1 and the extending direction. They are arranged along the width direction D2 orthogonal to D1. A portion 12b is formed between the adjacent convex portions 12a and the convex portions 12a because of the substantially concave shape. Therefore, the liquid gasket 3 is filled in the portion 12b and the like, and the liquid gasket 3 is held. The liquid gasket holding portion 12 is arranged in a predetermined region extending in the extending direction D1 with the three-sided mating portion 8 substantially at the center, and is arranged in a region of about several cm in the extending direction D1, for example. For example, the number of convex portions 12a, the spacing between the convex portions 12a, and the like are appropriately determined according to the size of this region and the like.

The rib portion 13 is a portion provided for preventing the main body portion 10 from coming off from the groove 7b of the head cover 7 and preventing the main body portion 10 from falling over. When the main body portion 10 is inserted into the groove 7b, the rib portion 13 comes into contact with the side surface 7c of the groove 7b of the head cover 7. A plurality of rib portions 13 are provided on the side surfaces 10a and 10a of the main body portion 10, respectively. The plurality of rib portions 13 provided on each side surface 10a are arranged at predetermined intervals from each other along the extending direction D1 of the gasket 1. The rib portion 13 is formed in a convex shape on the side surface 10a of the main body portion 10, for example, and extends along the height direction of the main body portion 10. As shown in FIG. 2, the rib portion 13 is provided with the cross section of the main body portion 10 described above in a range from the upper portion of the rectangular portion to the flat plate portion 11 along the height direction of the main body portion 10. The width of the rib portion 13 is, for example, approximately half the difference between the width of the groove 7b of the head cover 7 and the width of the main body portion 10.

The hole 14 is formed in the flat plate portion 11 and holds the liquid gasket 3 to be filled between the lower surface 11a of the flat plate portion 11 and the upper surface 5a of the cylinder head 5 and the upper surface 6a of the chain cover 6, and the liquid gasket 3 is filled with air. It is a hole for supplying. The hole 14 is a through hole that penetrates the flat plate portion 11 in the thickness direction. The holes 14 are formed in the flat plate portion 11 on one side and the flat plate portion 11 on the other side, respectively. As shown in FIG. 3, the hole 14 is arranged in a region (a region on the side of the liquid gasket holding portion 12) filled with the liquid gasket 3 in the extending direction D1 in the flat plate portion 11. One end of the hole 14 is opened to the lower surface 11a of the flat plate portion 11 (the upper surface 5a of the cylinder head 5 and the surface of the chain cover 6 on the upper surface 6a side). The other end of the hole 14 is opened to the upper surface 11b (the surface of the head cover 7 on the lower surface 7a side) of the flat plate portion 11. The hole 14 is arranged, for example, in a substantially central portion (or a main body portion 10 side of the central portion) in the width direction D2 of the flat plate portion 11. The cross-sectional shape of the hole 14 is, for example, a circular shape.

The number of holes 14 may be one or a plurality. When one is provided, the holes 14 are arranged, for example, at a substantially central portion of the extending direction D1 in the above-mentioned region and a substantially central portion of the flat plate portion 11 in the width direction D2. When a plurality of holes 14 are provided, for example, as shown in FIG. 3, the plurality of holes 14 are arranged at substantially the center of the flat plate portion 11 in the width direction D2, and are spaced apart from each other in the extending direction D1 in the above-mentioned region. Is placed. For example, when one hole 14 is provided, the diameter of the hole 14 is increased, and when a plurality of holes 14 are provided, the diameter of the hole 14 is decreased. The diameter of the hole 14 is appropriately determined, for example, according to the size of the above-mentioned region and the like.

The region including the hole 14 between the lower surface 11a of the flat plate portion 11 and the upper surface 5a of the cylinder head 5 and the upper surface 6a of the chain cover 6 becomes the liquid gasket holding portion 15 that holds the liquid gasket 3 on the outside of the main body portion 10. .. The liquid gasket holding portions 15 are provided on both sides (outside) of the main body portion 10, and have substantially the same range as the liquid gasket holding portions 12 provided at the lower end portion 10b of the main body portion 10 in the extending direction D1. The liquid gaskets 3 are filled in the liquid gasket holding portions 15 and 15, respectively, and the liquid gasket 3 also enters the holes 14 and is cured, so that the lower surface 11a of the flat plate portion 11, the upper surface 5a of the cylinder head 5 and the chain cover 6 are formed. The liquid gasket 3 filled between the upper surface 6a and the upper surface 6a is held.

The liquid gasket 3 is filled in the liquid gasket holding portion 12 provided at the lower end portion 10b of the main body portion 10 of the gasket 1 and the liquid gasket holding portions 15 and 15 outside the main body portion 10. The liquid gasket 3 is, for example, FIPG. The liquid gasket 3 is a moisture-curable liquid gasket. The liquid gasket 3 is cured by the moisture in the air.

The assembly and operation of the gasket 1 having the above-described configuration will be described. The main body 10 of the gasket 1 is inserted into the groove 7b of the head cover 7. At this time, the upper end portion 10c of the main body portion 10 is inserted until it comes into contact with the bottom surface 7e of the groove 7b. When the main body portion 10 is inserted, the plurality of rib portions 13 are brought into close contact with the side surfaces 7c and 7c of the groove 7b, respectively. Due to the plurality of rib portions 13, each side surface 10a of the main body portion 10 and each side surface 7c of the groove 7b do not come into contact with each other. A part of the main body 10 on the lower end 10b side (particularly, a portion where the pair of flat plate portions 11 and the liquid gasket holding portion 12 are provided) protrudes from the groove 7b. There is a gap between the flat plate portion 11 and the lower surface 7a of the peripheral wall of the head cover 7.

The liquid gasket 3 is provided in the liquid gasket holding portion 12 provided at the lower end portion 10b of the main body portion 10 and the liquid gasket holding portions 15 and 15 outside the main body portion 10 (the lower surface 11a of the flat plate portion 11 and the upper surface 5a of the cylinder head 5 and the chain). The area including the hole 14 between the cover 6 and the upper surface 6a) is filled. The amount of the liquid gasket 3 to be filled is, for example, an amount sufficiently distributed over the entire liquid gasket holding portions 12 and the liquid gasket holding portions 15 and 15. However, the amount of the liquid gasket 3 filled in the liquid gasket holding portion 15 does not leak to the outside. Then, the head cover 7 with the gasket 1 attached is arranged on the cylinder head 5 and the chain cover 6, and is fixed to the cylinder head 5 and the chain cover 6 by bolting. As a result, the head cover 7 is assembled to the cylinder head 5 and the chain cover 6.

By this assembly, the gasket 1 is mounted between the cylinder head 5, the chain cover 6 and the head cover 7. As a result, the upper end portion 10c of the main body portion 10 is in close contact with the bottom surface 7e of the groove 7b, and the lower end portion 10b of the main body portion 10 is in close contact with the upper surface 5a of the cylinder head 5 and the upper surface 6a of the chain cover 6. Further, the liquid gasket 3 is filled and held in the liquid gasket holding portions 12 and the liquid gasket holding portions 15 and 15 of the gasket 1.

Air is supplied to the liquid gasket holding portions 12 and the liquid gasket holding portions 15 and 15 from the outside (outside of the liquid gasket 3 filled in the liquid gasket holding portions 15 and 15). The liquid gasket 3 held by the liquid gasket holding portions 12 and the liquid gasket holding portions 15 and 15 (particularly, held outside in the width direction D2) absorbs moisture in the air supplied from the outside. Further, air is supplied to the liquid gasket holding portions 12 and the liquid gasket holding portions 15 and 15 through the holes 14 from the gap between the upper surface 11b of the flat plate portion 11 and the lower surface 7a of the head cover 7. The liquid gasket 3 held by the liquid gasket holding portions 12 and the liquid gasket holding portions 15 and 15 (particularly, held inside in the width direction D2 where air from the outside is difficult to reach) is supplied through the holes 14. Absorbs moisture in the air. As a result, the curing of the liquid gasket 3 is promoted, and the liquid gasket 3 is cured in a short time. By curing the liquid gasket 3, the adhesion of the liquid gasket 3 to the cylinder head 5, the chain cover 6 and the gasket 1 is improved, and the sealing strength is improved.

When the liquid gaskets 3 are filled in the liquid gasket holding portions 15 and 15, the liquid gasket 3 also enters the holes 14. When the liquid gasket 3 in the hole 14 is cured, it functions as an anchor for the liquid gasket 3 filled between the lower surface 11a of the flat plate portion 11, the upper surface 5a of the cylinder head 5, and the upper surface 6a of the chain cover 6. The holding force of the liquid gasket 3 between the lower surface 11a and the upper surfaces 5a and 6a is improved. As a result, the sealing strength of the liquid gasket 3 is improved.

When the gasket 1 is attached, the main body 10 is sandwiched between the bottom surface 7e of the groove 7b of the head cover 7 and the upper surface 5a of the cylinder head 5 and the upper surface 6a of the chain cover 6, and is elastically deformed. Due to this elastic deformation, a reaction force is generated on the cylinder head 5 and the chain cover 6 on the main body 10, and a reaction force is generated on the head cover 6. The main body 10 seals between the cylinder head 5, the chain cover 6, and the head cover 7.

By the way, as shown in FIG. 4, when there is a step 8a in the three-sided mating portion 8 (particularly between the cylinder head 5 and the chain cover 6), there is a gap between the gasket 1 and the cylinder head 5 or the chain cover 6. C can be done. Since the gasket 1 is provided with the liquid gasket holding portions 12 and the liquid gasket holding portions 15 and 15 corresponding to the three-sided mating portion 8, the liquid gasket 3 is also filled in such a gap C. The liquid gasket holding portions 12 and the liquid gasket holding portions 15 and 15 are filled and cured, and the region including the three-sided mating portion 8 (particularly, the gap C) is sealed.

In particular, the liquid gasket holding portions 15 and 15 hold a large amount of the liquid gasket 3 on the outside of the main body portion 10. Therefore, the sealing performance of the liquid gasket 3 is improved. For example, even if the step 8a (gap C) changes due to the difference in thermal expansion between the cylinder head 5 and the chain cover 6 with respect to the heat generated by the engine 2 when the engine 2 is operating, the liquid gasket 3 follows the change. can do. Further, due to the anchor effect of the liquid gasket 3 in the hole 14, for example, even when vibration occurs in the engine 4, between the lower surface 11a of the flat plate portion 11 and the upper surface 5a of the cylinder head 5 and the upper surface 6a of the chain cover 6. It is possible to prevent the liquid gasket 3 from being displaced with respect to the three-sided mating portion 8, and it is possible to secure the sealing property.

According to the gasket 1 according to the first embodiment, a hole 14 is formed in each flat plate portion 11, and a liquid gasket holding portion 15 is formed in a region including the hole 14 between the flat plate portion 11 and the cylinder head 5 and the chain cover 6. By providing 15, the liquid gasket 3 can be filled on the outside of the main body 10, so that the filling amount (reservoir amount) of the liquid gasket 3 can be increased. By increasing the amount of the liquid gasket 3, the followability of the liquid gasket 3 can be improved, and the sealing performance of the liquid gasket 3 can be improved. In particular, even if a step 8a (gap C) is formed in the three-sided mating portion 8 between the cylinder head 5 and the chain cover 6 and the head cover 7, the sealing property can be ensured, and the step 8a (gap C) changes. Even if it is done, the sealing property can be ensured.

According to the gasket 1 according to the first embodiment, by forming a hole 14 in each flat plate portion 11, the liquid gasket 3 enters the hole 14 and is cured, so that the flat plate portion 11, the cylinder head 5, and the chain cover are formed. It is possible to improve the holding force of the liquid gasket 3 between the 6 and the liquid gasket 3. As a result, the sealing performance of the liquid gasket 3 can be improved.

According to the gasket 1 according to the first embodiment, by making the hole 14 of each flat plate portion 11 a through hole, the liquid gasket holding portion 12 and the liquid gasket holding portion 15 are provided by the air supplied through the hole 14. The curing of the liquid gasket 3 can be promoted from the inside of the liquid gasket 3 and the curing time of the liquid gasket 3 can be shortened. For example, in an automobile engine assembly line, even when an engine completion inspection is performed after the engine assembly is completed, the liquid gasket can be cured before the engine 4 is operated by the inspection.

According to the gasket 1 according to the first embodiment, when a plurality of holes 14 are formed in the flat plate portion 11, an anchor effect can be obtained at a plurality of locations and air can be supplied from the plurality of locations. The holding force of the liquid gasket 3 between the cylinder head 5 and the chain cover 6 with respect to the liquid gasket 3 can be further improved, and the curing time of the liquid gasket 3 can be further shortened.

According to the gasket 1 according to the first embodiment, the sealing performance of the liquid gasket 3 can be further improved by providing the liquid gasket holding portion 12 also at the lower end portion 10b (bottom surface) of the main body portion 10.

According to the gasket 1 according to the first embodiment, since the hole 14 is a through hole that penetrates from the lower surface 11a to the upper surface 11b of the flat plate portion 11 in a straight line, the hole 14 can be easily formed in the flat plate portion 11. it can.

(Second Embodiment)
Next, the gasket 2 according to the second embodiment will be described with reference to FIG. FIG. 5 is a cross-sectional view of the gasket 2 according to the second embodiment. The cross section shown in FIG. 5 is a cross section of a portion similar to the cross section shown in FIG.

The gasket 2 has a different hole 24 formed in the flat plate portion 11 as compared with the gasket 1 according to the first embodiment. Hereinafter, the hole 24 and the liquid gasket holding portion 25 provided in the area including the hole 24 will be described.

The hole 24 is a hole formed in the flat plate portion 11 for holding the liquid gasket 3 to be filled between the lower surface 11a of the flat plate portion 11 and the upper surface 5a of the cylinder head 5 and the upper surface 6a of the chain cover 6. The hole 24 is a bottomed hole. The holes 24 are formed in the flat plate portion 11 on one side and the flat plate portion 11 on the other side, respectively. The hole 24 is arranged at the same location as the hole 14 according to the first embodiment. The hole 24 is opened in the lower surface 11a of the flat plate portion 11. The hole 24 is, for example, a hole recessed in a substantially hemispherical shape. The number of holes 24 may be one or a plurality, as in the case of the holes 14 according to the first embodiment.

The region including the hole 24 between the lower surface 11a of the flat plate portion 11 and the upper surface 5a of the cylinder head 5 and the upper surface 6a of the chain cover 6 becomes the liquid gasket holding portion 25 that holds the liquid gasket 3 on the outside of the main body portion 10. .. The liquid gasket holding portions 25 are provided on both sides (outside) of the main body portion 10, and are arranged in the same region as the liquid gasket holding portion 15 according to the first embodiment. The liquid gaskets 3 are filled in the liquid gasket holding portions 25 and 25, respectively, and the liquid gasket 3 also enters the holes 24 and hardens, so that the lower surface 11a of the flat plate portion 11, the upper surface 5a of the cylinder head 5 and the chain cover 6 are cured. The liquid gasket 3 to be filled is held between the upper surface 6a and the upper surface 6a.

The operation of the gasket 2 having the above-described configuration will be described. Since the assembly of the gasket 2 is performed in the same manner as the assembly of the gasket 1 described in the first embodiment, the description thereof will be omitted. However, since the hole 24 is not a through hole, air is not supplied to the liquid gasket 3 through the hole 24.

Similar to the gasket 1 according to the first embodiment, the main body 10 of the gasket 2 seals between the cylinder head 5, the chain cover 6 and the head cover 7. Further, similarly to the gasket 1 according to the first embodiment, the region including the three-sided mating portion 8 (particularly, the liquid gasket 3 held by the liquid gasket holding portion 12 and the liquid gasket holding portions 25 and 25 of the gasket 2 respectively). , Gap C) is sealed.

In particular, similarly to the liquid gasket holding portions 15 and 15 according to the first embodiment, since the liquid gasket holding portions 25 and 25 hold a large amount of the liquid gasket 3 on the outside of the main body portion 10, the liquid gasket 3 is held. The sealing performance according to 3 is improved. Further, when the liquid gasket 3 enters the hole 24 formed in the flat plate portion 11 and is cured, the liquid gasket 3 between the lower surface 11a of the flat plate portion 11 and the upper surface 5a of the cylinder head 5 and the upper surface 6a of the chain cover 6 is formed. It functions as an anchor for the liquid gasket 3 and improves the holding force of the liquid gasket 3 between the lower surface 11a and the upper surfaces 5a and 6a. As a result, the sealing strength of the liquid gasket 3 is improved.

According to the gasket 2 according to the second embodiment, it has the same effect as the gasket 1 according to the first embodiment. However, since the hole 24 is not a through hole, the effect on the through hole is excluded.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified in various ways. For example, in the embodiment, an example is shown in which the gasket 1 in which the liquid gasket 3 is used is applied to the seal between the cylinder head 5 and the chain cover 6 of the automobile engine 4 and the head cover 7, but the seal is required at any place. For example, it may be applied between the other three members of the automobile, or may be applied to other than the automobile. In particular, it is suitable for a structure in which a step is formed in a three-sided mating portion where the faces of the three members are aligned.

In the above embodiment, the liquid gasket holding portion 12 is provided at the lower end portion 10b (bottom surface) of the main body portion 10, but the liquid gasket holding portion may not be provided at the lower end portion 10b of the main body portion 10. Further, in the above embodiment, as an example of the liquid gasket holding portion 12, a plurality of substantially × -shaped convex portions 12a are arranged in each direction D1 and D2, but the liquid gasket holding portion has another shape. For example, a convex portion may be formed in a mesh shape on the bottom surface of the main body portion, or a plurality of concave portions may be formed on the bottom surface of the main body portion.

In the above embodiment, an example in which holes 14 and 24 are provided in a row in each flat plate portion 11 in the width direction D2 (example shown in FIG. 3) is shown, but the arrangement of the holes 14 and 24 may be other arrangements, for example, holes. A plurality of rows 14 and 24 may be provided in the width direction D2.

In the above embodiment, the shapes of the holes 14 and 24 have a circular cross section, but the holes 14 and 24 may have other shapes, for example, an elliptical shape having a long cross section in the extending direction D1. Alternatively, it may be a rectangular shape having a long cross section in the extending direction D1.

In the first embodiment, the hole 14 is an example of a through hole penetrating from the lower surface 11a to the upper surface 11b of the flat plate portion 11, but the through hole penetrates from the lower surface 11a of the flat plate portion 11 to another surface. It may be a through hole. For example, as shown in FIG. 6, the hole 34 formed in the flat plate portion 11 may be a through hole penetrating from the lower surface 11a to the side surface 11c of the flat plate portion 11. By forming the hole 34 (through hole) opened in the side surface 11c of the flat plate portion 11 in this way, even if there is no gap between the upper surface 11b of the flat plate portion 11 and the lower surface 7a of the peripheral wall of the head cover 7, the hole 34 Air can be supplied through.

1, 2, Gasket 3 Liquid Gasket 4 Engine 5 Cylinder Head 6 Chain Cover 7 Head Cover 8 3 Face-to-face 10 Main Body 10a Side 10b Bottom 11 Flat Plate 11a Bottom 11b Top 11c Side 12, 15, 25 Liquid Gasket Holding 13 Ribs Part 14, 24, 34 holes

Claims (7)

A gasket that is formed of an elastic material, extends between members to be sealed, and is filled with a liquid gasket in at least a part of the region in the extending direction.
The main body interposed between the members to be sealed and
A flat plate portion provided on the side surface of the main body portion along the extending direction, and a flat plate portion.
With
A gasket characterized in that the flat plate portion is arranged in a region where the liquid gasket is filled in the extending direction, and a hole is formed on the surface on the side where the liquid gasket is filled. The gasket according to claim 1, wherein the hole is a through hole penetrating the flat plate portion. The flat plate portions are provided on both side surfaces of the main body portion, respectively.
The gasket according to claim 1 or 2, wherein the hole is formed in the flat plate portion provided on one side surface and the flat plate portion provided on the other side surface, respectively. The gasket according to any one of claims 1 to 3, wherein a plurality of the holes are provided at intervals in the extending direction. The invention according to any one of claims 1 to 4, wherein a liquid gasket holding portion is provided at an end portion of the main body portion on the side where the liquid gasket is filled and holds the liquid gasket. Gasket. The gasket according to any one of claims 1 to 5, wherein the region filled with the liquid gasket includes a portion where the three members to be sealed are combined. An engine in which three members to be sealed are sealed by a gasket that also uses a liquid gasket.
The gasket is the gasket according to claim 6.
An engine characterized in that the liquid gasket is held between the flat plate portion and one of the sealed members in a region including the hole in the extending direction.

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