JP7418254B2 - Laminated gasket - Google Patents

Description

The present invention relates to a laminated gasket formed by laminating a plurality of metal plates.

2. Description of the Related Art Laminated gaskets formed by laminating a plurality of metal plates have been known. Such laminated gaskets are installed, for example, at the joint between the cylinder block and cylinder head of an automobile engine, etc., to ensure internal pressure within the cylinder and to prevent fluids such as cooling water and engine oil from entering the cylinder. It is used as a gasket to prevent water from flowing into the air (for example, see Patent Documents 1 to 3).

Japanese Unexamined Patent Publication No. 8-178073 Japanese Patent Application Publication No. 2007-147031 Japanese Patent Application Publication No. 2008-144794

As means for fastening a plurality of metal plates, there are well known methods using fastening parts such as eyelets and rivets, methods using press working with a press machine, and methods using spot welding with a welding machine. However, in the method using fastening parts, it is necessary to prepare the fastening parts separately, and in addition, special equipment and tools for fastening with the fastening parts are required, which is expensive. Furthermore, in the method using press working, the shape of the bead responsible for the sealing performance of the gasket may be distorted during the press working, which may affect the sealing performance. Furthermore, in the method using spot welding, spatter is likely to occur around the welding location, which can lead to product defects. Although it is possible to remove the spatter, a separate removal operation is required, which may reduce productivity. In particular, if the number of welding points increases, the drop in productivity cannot be ignored.

In producing a laminated gasket by fastening a plurality of metal plates in this manner, further ingenuity is required.

In view of the above circumstances, the present invention realizes a laminated gasket that can be fastened with a simple configuration while suppressing the influence on sealing performance.

In order to solve the above problems, the present invention provides the following laminated gasket.

[1] A laminated gasket in which a plurality of metal plates each having a passage hole, which is a through hole serving as a fluid passage, are stacked in a state where the passage holes communicate with each other,
Each of the plurality of metal plates has an elongated through hole extending in one direction, and two or more convex portions that protrude in the stacking direction and are lined up along the one direction. It is formed at one end away from the passageway,
Any two metal plates adjacent to each other among the plurality of metal plates have an elongated through hole that one metal plate has in the other metal plate. A laminated gasket in which two or more convex portions are laminated together in a manner that they fit together.

[2] Two or more convex portions of two metal plates laminated on both sides of one metal plate having the elongated through hole among the plurality of metal plates are They are inserted and fitted into the same elongated through hole of the metal plate from opposite sides,
One of the two or more convex portions of one of the two metal plates laminated on both sides of the one metal plate is one of the two or more convex portions of the elongated through hole in the one direction. One end of the elongated through hole is fitted into the elongated through hole, and one of the two or more convex portions of the other metal plate is attached to the other end of the elongated through hole in the one direction. The laminated gasket according to [1], which fits into the elongated through hole.

[3] The width of the elongated through hole in the direction perpendicular to the one direction is the width of the two or more convex portions that fit into the elongated through hole in the direction perpendicular to the one direction. The laminated gasket according to [1] or [2], wherein the maximum diameter of the convex portion is approximately the same as the maximum diameter of the convex portion.

[4] The two or more convex portions of the other metal plate have a tapered shape that becomes thicker as the distance from the other metal plate increases. Laminated gasket.

In the laminated gasket of the present invention, two or more metal plates adjacent to each other have two or more protrusions of the other metal plate fitted into elongated through-holes of one of the metal plates. They are stacked on top of each other in such a manner. In this way, two metal plates are fastened together simply by fitting two or more protrusions into the elongated through-holes, so the structure required for fastening is extremely simple, easy to work with, and provides additional functionality. No parts or equipment are required, and costs are low. In addition, the elongated through-hole and two or more protrusions required for fastening are formed at the end remote from the channel hole, and are not formed near the channel hole where beads are normally formed. Not yet. Therefore, when two or more convex portions or elongated through holes are formed, the shape of the bead portion is not distorted, and the influence on sealing performance is suppressed. In particular, since the through holes of the mating partners of two or more convex parts are elongated, the structure allows the distortion that tends to occur in fastening parts to escape easily, and this also has no effect on sealing performance. It's suppressed. As a result, the present invention realizes a laminated gasket that can be fastened with a simple configuration while suppressing the influence on sealing performance.

It is a schematic diagram showing the laminated type gasket of this embodiment formed by laminating a 1st metal plate, a 2nd metal plate, and a 3rd metal plate. FIG. 2 is a plan view of the first metal plate of FIG. 1; FIG. 2 is a plan view of the second metal plate of FIG. 1; FIG. 2 is a plan view of the third metal plate in FIG. 1; 3 is a side view showing a convex portion formed on the first metal plate of FIG. 2. FIG. FIG. 2 is a cross-sectional view of the laminated gasket in a plane perpendicular to the Y direction in FIG. 1, including a straight line AA' in the X direction passing through the convex portion in FIG. 1; FIG. 2 is a cross-sectional view of the laminated gasket on a plane perpendicular to the X direction in FIG. 1, including a straight line BB' in the Y direction passing through the convex portion in FIG. 1; FIG. 3 is a side view showing a convex portion having a tapered shape that becomes thicker as it gets farther from the first metal plate.

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the present invention is not limited to the following embodiments, and it is understood that changes and improvements in the design may be made as appropriate based on the common knowledge of those skilled in the art without departing from the spirit of the present invention. It should be.

The laminated gasket of this embodiment is a laminated gasket formed by laminating a plurality of metal plates. Such laminated gaskets are installed, for example, at the joint between the cylinder block and cylinder head of an automobile engine, etc., to ensure internal pressure inside the cylinder while allowing fluids such as cooling water and engine oil to flow inside the cylinder. One example is a multilayer gasket that prevents water from flowing in.

In the following, from the viewpoint of clarifying the explanation, a case in which the laminated gasket of the present embodiment is formed by laminating three metal plates will be specifically explained. However, this is just an example, and the present invention is not limited to the case where the number of metal plates is three as described above. For example, the laminated gasket of the present invention may include five metal plates. It may be formed by laminating layers.

FIG. 1 is a schematic diagram showing a laminated gasket 1 of this embodiment, which is formed by laminating a first metal plate 10, a second metal plate 20, and a third metal plate 30. 2 is a plan view of the first metal plate 10 in FIG. 1, FIG. 3 is a plan view of the second metal plate 20 in FIG. 1, and FIG. 4 is a plan view of the third metal plate 20 in FIG. 3 is a plan view of a metal plate 30. FIG.

In FIG. 1, in order to clearly show the laminated structure consisting of three metal plates 10, 20, and 30, three metal plates 10 are shown in the lamination direction (direction perpendicular to both the X direction and the Y direction in FIG. 1). , 20, 30 are shown with the positions of the metal plates 10, 20, 30 slightly shifted. As shown in FIG. 1, the laminated gasket 1 has a laminated structure in which metal plates are laminated in this order: a third metal plate 30, a second metal plate 20, and a first metal plate 10. Each of the three metal plates 10, 20, and 30 has one first passage hole 15, 25, and 35, which is a through hole serving as a passage for a first fluid (for example, exhaust gas). Furthermore, four second passage holes 16, 26, and 36 are formed in each of the three metal plates 10, 20, and 30, which serve as passages for a second fluid (for example, cooling water, etc.). When the three metal plates 10, 20, 30 are stacked, the first channel holes 15, 25, 35 communicate with each other, and the second channel holes 16, 26, 36 communicate with each other. Three metal plates 10, 20, and 30 are stacked so that all four sets of two channel holes communicate with each other. Here, in the three metal plates 10, 20, 30, in the vicinity of the first flow passage holes 15, 25, 35 and the second flow passage holes 16, 26, 36, the first passage holes 15, 25, 30, 35 and the second flow passage holes 16, 26, and 36 are formed, and during lamination, the beads of each metal plate come into pressure contact with each other and the first fluid and the second This prevents fluid leakage and maintains sealing performance.

Here, each of the three metal plates 10, 20, and 30 has a long hole-shaped through hole that spreads in one direction, and two or more convex portions that protrude in the stacking direction and are lined up along that one direction. One of them is formed at one end portion away from the first channel holes 15, 25, 35 and the second channel holes 16, 26, 36.

Specifically, as shown in FIG. 2, the first metal plate 10 has two metal plates arranged along the Y direction perpendicular to the X direction at the right end when the X direction in the figure is the right direction. It has convex parts 11 and 12, and two convex parts 13 and 14 arranged along the Y direction at the left end (the four convex parts 11, 12, 13, and 14 are shown in the figure). (See also 1). As can be seen from the dotted lines in FIGS. 1 and 2, these four convex portions 11, 12, 13, and 14 are located on the back side of the figure, that is, on the second metal plate 20 and It protrudes toward the third metal plate 30 side.

FIG. 5 is a side view showing the convex portion 11 formed on the first metal plate 10 of FIG. 2. As shown in FIG.

The convex portion 11 is a button-shaped convex portion having a low height and a flat, cylindrical shape, and FIG. 5 shows a side view of the convex portion 11 . Here, the remaining three convex portions 12, 13, 14 in FIG. 2 and convex portions 31, 32, 33, 34 of the third metal plate 30 in FIG. 4, which will be described later, are also formed at different locations. It has the same shape as the convex portion 11 except for.

On the other hand, the second metal plate 20 in FIG. 3 has an elongated through hole 21 that extends in the Y direction at the right end, and an elongated through hole 22 that extends in the Y direction at the left end. have. Furthermore, the second metal plate 20 has an elongated through hole 23 that extends in the X direction at the upper end when the Y direction in the figure is the upper direction, and a long hole-shaped through hole 23 that extends in the X direction at the lower end. It has a widening elongated through hole 24 (see also FIG. 1 for the elongated through hole 21 on the right side and the elongated through hole 24 on the lower side).

Further, the third metal plate 30 in FIG. 4 has two protrusions 31 and 32 arranged along the Y direction at the right end, and two protrusions 31 and 32 arranged along the Y direction at the left end. It has protrusions 33 and 34 (see also FIG. 1 for the protrusions 31 and 32 on the right side). As can be seen from the fact that these four convex portions 31, 32, 33, and 34 are indicated by solid lines in FIGS. 1 and 2, they are located on the front side of the figure, that is, on the first metal plate 10 and It protrudes toward the second metal plate 20 side.

Here, the protrusions 11 and 12 in FIG. 2 located at the right end and 31 and 32 in FIG. 4 are the same in the X direction as the elongated through hole 21 in FIG. 3 located at the right end. It is located in the same range in the Y direction as the elongated through hole 21 extends. Similarly, the protrusions 13 and 14 in FIG. 2 located at the left end and 33 and 34 in FIG. 4 are the same in the X direction as the elongated through hole 22 in FIG. 3 located at the left end. It is located in the same range in the Y direction as the elongated through hole 22 extends.

In the laminated gasket 1, the protrusions 11 and 12 on the right side in FIG. 2 and the protrusions 31 and 32 on the right side in FIG. It fits into the elongated through hole 21 on the right side. Furthermore, the protrusions 13 and 14 on the left side of FIG. 2 and the protrusions 33 and 34 on the left side of FIG. Fits into hole 22. Through such fitting, the three metal plates 10, 20, and 30 are fastened to each other. This fastening mechanism will be explained in more detail below.

FIG. 6 is a cross-sectional view of the laminated gasket 1 on a plane that includes a straight line AA′ in the X direction passing through the convex portion 31 in FIG. 1 and is perpendicular to the Y direction in FIG.

In FIG. 6, in order to clearly show the laminated structure consisting of three metal plates 10, 20, and 30, three metal plates 10, 20, and 30 are stacked in the lamination direction (direction perpendicular to the X direction in FIG. 6). Three metal plates 10, 20, and 30 are shown with their positions slightly shifted. As shown in FIG. 6, the convex portion 31 of the third metal plate 30 is located at the same position as the elongated through hole 21 of the second metal plate 20 in the X direction, and the three metal plates 10, 20 , 30 are stacked, the protrusion 31 enters and fits into the elongated through hole 21. Although not shown in FIG. 6, another convex portion 32 on the right side of the third metal plate 30 in FIG. 4 also fits into the elongated through hole 21 in the same manner as the convex portion 31 in FIG. match. Furthermore, the two protrusions 11 and 12 on the right side of the first metal plate 10 in FIG. 2 also fit into the elongated through-hole 21 in the same manner as the protrusion 31 in FIG.

A similar fitted state is established between the elongated through hole 22 on the left side of FIG. 3 and the protrusions 13 and 14 on the left side of FIG. 2 and the protrusions 33 and 34 on the left side of FIG. 4.

FIG. 7 is a cross-sectional view of the laminated gasket 1 on a plane perpendicular to the X direction in FIG. 1, including a straight line BB' in the Y direction passing through the convex portions 13 and 14 in FIG.

In FIG. 7, in order to clearly show the laminated structure, the positions of the three metal plates 10, 20, and 30 are slightly shifted in the lamination direction (direction perpendicular to the Y direction in FIG. 7). Plates 10, 20, 30 are shown. As shown in FIG. 7, the two convex portions 13 and 14 of the first metal plate 10 are within the same range as the elongated through hole 22 extending in the Y direction. Furthermore, the plane that includes the straight line BB' in FIG. 1 and is perpendicular to the X direction in FIG. , 34 are also within the same range in the Y direction as the elongated through hole 22 extends. When the three metal plates 10, 20, 30 are stacked, the two protrusions 13, 14 of the first metal plate 10 and the two protrusions 33, 34 of the third metal plate 30 form elongated through holes. 22 and fit.

The same fitted state as in FIG. 7 is also established between the elongated through hole 21 on the right side of FIG. 3 and the convex portions 11 and 12 on the right side in FIG. do.

As explained in FIGS. 6 and 7 above, in the laminated gasket 1 of this embodiment, the first metal plate 10 and the second metal plate 20 that are adjacent to each other are connected to the elongated holes of the second metal plate 20. The convex portions 11, 12 and convex portions 13, 14 of the first metal plate 10 are stacked on each other in such a manner that they fit into the through holes 21, 22, respectively. Similarly, the third metal plate 30 and the second metal plate 20 that are adjacent to each other have the convex portion 31 of the third metal plate 30 and the elongated through holes 21 and 22 of the second metal plate 20 32 and the convex portions 33 and 34 are stacked on each other in a manner that they fit into each other.

In this way, in the laminated gasket 1 of this embodiment, the protrusions 11, 12, 13, 14, 31, 32, 33, and 34 are only fitted into the elongated through holes 21 and 22, respectively, and the adjacent Since two metal plates are fastened together, the configuration required for fastening is extremely simple. Therefore, it is easy to work with, requires no additional parts or equipment, and is inexpensive. In addition, the elongated through holes 21, 22 and the convex portions 11, 12, 13, 14, 31, 32, 33, 34 required for fastening are the first passage holes 15, 25, 35 and the second passage holes. Since it is formed at the end portion away from 16, 26, and 36, it is not formed near the channel hole where a bead is normally formed. Therefore, when forming the convex parts 11, 12, 13, 14, 31, 32, 33, 34 and the elongated through holes 21, 22, the shape of the bead part is not distorted, and the sealing performance is improved. The impact is suppressed. In particular, the through-holes to which each protrusion is mated are elongated, making it easy for the distortion that tends to occur in fastening parts to escape, and this also reduces the effect on sealing performance. ing. As a result, in this embodiment, a laminated gasket that can be fastened with a simple configuration while suppressing the influence on sealing performance is realized.

Here, as shown in FIG. 7, the first metal plate 10 and the third metal plate 30, which are laminated on both sides of the second metal plate 20 having the elongated through hole 22, each have a convex portion 13. , 14 and the protrusions 33, 34 are inserted into and fitted into the elongated through hole 22 from opposite sides, and when the Y direction in FIG. 7 is set to the right, the first The protrusion 14 of the metal plate 10 fits into the elongated through hole 22 at the left end of the elongated through hole 22, and the protrusion 33 of the third metal plate 30 fits into the elongated through hole 22. It is preferable that the right end of 22 be fitted into the elongated through hole 22.

According to such a configuration, the second metal plate 20 is less likely to be misaligned in the Y direction or in the opposite direction to the Y direction relative to the first metal plate 10 and the third metal plate 30. , the fastening state is stabilized.

Note that a similar positional relationship is established between the elongated through hole 21 and the convex portions 11, 12, 31, and 32 in FIG. That is, when the Y direction in FIG. 1 is set upward, the convex portion 11 of the first metal plate 10 fits into the elongated through hole 21 at the upper end of the elongated through hole 21. However, the convex portion 32 of the third metal plate 30 fits into the elongated through hole 22 at the lower end of the elongated through hole 22 . This also makes it difficult for the second metal plate 20 to be misaligned in the Y direction or in the opposite direction to the Y direction relative to the first metal plate 10 and the third metal plate 30, and the fastened state is stabilized. become

Further, as shown in FIG. 6, the width of the elongated through hole 21 in the X direction of FIG. It is preferable that the maximum diameter in the X direction of the convex portion 31 in FIG. 6 that fits into the hole-shaped through hole 21 is approximately the same.

According to this embodiment, the convex portion 31 fits snugly into the elongated through hole 21 and the fitted state is strengthened, so that the second metal plate 20 having the elongated through hole 21 and the convex portion The fastened state with the third metal plate 30 having the portion 31 is stabilized.

In the above explanation, each convex part was explained as having a flat cylindrical button shape with a low height as shown in FIG. 5, but in the present invention, each convex part is It may have a tapered shape that becomes thicker as the distance from each metal plate is increased.

Below, embodiments of such modifications will be briefly described. In the embodiment of this modification, the first metal plate 10 and the third metal plate 30 having the convex portions in the shape of FIG. 5 in the embodiment of FIGS. This is the same as the embodiment of FIGS. 1 to 7 described above, except that the two metal plates having the same shape are replaced. Therefore, the embodiment of this modification will be briefly described below, focusing on this change.

FIG. 8 is a side view showing a convex portion 11' having a tapered shape that becomes thicker as the distance from the first metal plate 10' increases.

As shown in FIG. 8, the protrusion 11' has a tapered shape that becomes thicker as the distance from the first metal plate 10' increases. It has a tapered shape that inclines toward the first metal plate 10' as it moves away from the metal plate 10'. In such a form, when the convex portion 11' is fitted into the elongated through hole 21 of the second metal plate 20 to which it is fitted, the tapered side surface acts as a kind of barb. This makes it difficult for the convex portion 11' to come out of the elongated through hole 21. As a result, in the embodiment of this modification, the fitted state between each elongated through hole and each convex portion is stabilized, and thereby two adjacent metal plates (for example, the first metal plate 10' and The fastening state between the second metal plates 20) is also stabilized.

The above is the description of this embodiment.

In the above, from the viewpoint of clarifying the explanation, the laminated gasket 1, which is formed by laminating three metal plates 10, 20, and 30, has been described as an example. However, as described above, in the present invention, the number of metal plates is not limited to three, and may be a laminated type gasket made by laminating, for example, five metal plates. For example, a new fourth metal plate and a new fourth metal plate are placed between the first metal plate 10 and the second metal plate 20 and between the third metal plate 30 and the second metal plate 20, respectively. It is conceivable to arrange a fifth metal plate. These fourth metal plate and fifth metal plate may have, for example, two or more convex portions that fit into the elongated through holes 23 and 24 of the second metal plate 20 in FIG. Elongated through holes that fit with the protrusions 11, 12, 13, 14 of the first metal plate 10 in FIG. 2 and the protrusions 31, 32, 33, 34 of the third metal plate 30 in FIG. You can adopt what you have.

INDUSTRIAL APPLICABILITY The present invention is useful for realizing a laminated gasket that can be fastened with a simple configuration while suppressing the influence on sealing performance.

1: Laminated gasket,
10: first metal plate,
10': first metal plate,
11: Convex portion,
11': convex part,
12: Convex portion,
13: Convex portion,
14: Convex portion,
15: first channel hole,
16: second channel hole,
20: second metal plate,
21: Long hole-shaped through hole,
22: Long hole-shaped through hole,
23: Long hole-shaped through hole,
24: Long hole-shaped through hole,
25: first channel hole,
26: second channel hole,
30: third metal plate,
31: Convex portion,
32: Convex portion,
33: Convex portion,
34: Convex portion,
35: first channel hole,
36: Second channel hole.

Claims (3)

A laminated gasket in which a plurality of metal plates each having a flow path hole, which is a through hole serving as a fluid flow path, are stacked in a state where the flow path holes communicate with each other,
Each of the plurality of metal plates has an elongated through hole extending in one direction, and two or more convex portions that protrude in the stacking direction and are lined up along the one direction. It is formed at one end away from the passageway,
Any two metal plates adjacent to each other among the plurality of metal plates have an elongated through hole that one metal plate has in the other metal plate. Two or more convex portions are stacked on each other in a manner that they fit together,
The two or more convex portions of the two metal plates stacked on both sides of the one metal plate having the elongated through hole among the plurality of metal plates are They are inserted and fitted into the same elongated through-hole from opposite sides,
One of the two or more convex portions of one of the two metal plates laminated on both sides of the one metal plate is one of the two or more convex portions of the elongated through hole in the one direction. One end of the elongated through hole is fitted into the elongated through hole, and one of the two or more convex portions of the other metal plate is attached to the other end of the elongated through hole in the one direction. A laminated gasket that fits into the elongated through hole . The width of the elongated through hole in the direction perpendicular to the one direction is the maximum width of the two or more convex portions that fit into the elongated through hole in the direction perpendicular to the one direction. The laminated gasket according to claim 1, wherein the diameter is approximately the same. The laminated gasket according to claim 1 or 2 , wherein the two or more convex portions of the other metal plate have a tapered shape that becomes thicker as the distance from the other metal plate increases.

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