JPH04105267U - Metal laminated gasket - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the yield by eliminating the increase in the amount of sheet metal used and the waste associated with cutting by forming protrusions for fixing each metal plate on the metal plate constituting the gasket. . [Configuration] Outer plates 11, 12 and middle plate 13 made of metal plates
In a metal laminated gasket assembled by laminating three or more sheets, locking holes 14 are bored through the outer and middle plates at multiple locations within the gasket surface, and one of the outer plates 1
A protruding piece 12a is provided on the edge of the hole 2, and the protruding piece 12a is attached to the locking hole 1.
At step 4, the laminated plates were folded back onto the other outer plate 11 to fix the stacked plates together. [Effect] By forming the protruding piece 12a within the gasket surface, it is possible to avoid an increase in the amount of sheet metal used and the need for cutting the protruding piece 12a, which would be the case when forming the protruding piece 12a outward from the edge of the gasket. There is no waste and the yield is improved.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a metal laminated gasket, and more specifically, to internal combustion gaskets. A laminated metal gasket installed between an engine's cylinder block and cylinder head. This is related to the improvement of.

0002

[Conventional technology]

Traditionally, metal installed between the cylinder block and cylinder head of an internal combustion engine. As a laminated gasket, as illustrated in Figs. 6 and 7, it is made from multiple metal plates. The outer panels 1 and 2 and the middle panel 3 are laminated, and the middle panel 3 is wrapped between the upper and lower outer panels 1 and 2. At the same time, a projecting piece 2a is attached to a part of the outer periphery of one outer panel 2. There is also a structure in which the projecting piece 2a is fixed by folding it back onto the other outer plate 1. is known.

0003 However, the conventional metal laminated gasket described above has outer plates 1, 2 and middle plate 3. Since the protruding piece 2a for fixing the bundle was formed on the edge of the outer plate 2 so as to protrude outward, The area of the outer panel 2 increases by the amount of the protrusion 2a, which increases the amount of sheet metal used. However, the drawback is that it tends to cause waste when cutting sheet metal, and the yield rate is low. It was.

0004

[Problem that the idea aims to solve]

The problem with this invention is that the amount of sheet metal used increases due to the formation of protrusions, and that The aim is to eliminate waste and increase yield.

[0005]

[Means to solve the problem]

In order to solve the above problems, the present invention uses three or more inner and outer plates made of metal plates. In a metal laminated gasket assembled by laminating, multiple locations within the gasket surface Drill a locking hole that passes through the outer and middle plates, and attach a protruding piece to the edge of the hole on one outer plate. The laminated It is characterized in that each plate is fixed in a fixed manner.

[0006] The edge of the hole in the middle plate of the above gasket is cut slightly larger than the folded protrusion. A chipped part is provided, and the laminated thickness of the intermediate plate with the chipped part is made to be the same as the thickness of the protruding piece. It is desirable to form it slightly thicker than that.

[0007] In addition, in order to more firmly fix the laminated metal plates and prevent misalignment, It is preferable to form some of the protrusions in a direction different from that of other protrusions.

[0008]

[Effect]

A locking hole is drilled in the gasket surface, and a protrusion is formed on the edge of the locking hole. Therefore, the amount of sheet metal used to form the protrusion does not increase, and the There is no waste when cutting.

[0009]

【Example】

1 to 3 show examples of the metal laminated gasket according to the present invention. The multilayer gasket consists of upper and lower outer plates 11 and 12, and a middle plate enclosed between them. It is equipped with 13. The above gasket is used for combustion chamber hole seals and other hole seals. It is the same as the conventional gasket mentioned above in that it has a round part, but the following It has the characteristic configuration described below.

0010 That is, the above gasket has upper and lower parts at multiple locations within the gasket surface. A locking hole 14 is drilled through the outer panels 11, 12 and the middle panel 13, and the lower outer panel 12 is A protruding piece 12a is provided on the edge of the hole, and the protruding piece 12a is attached to the upper outer plate 11 in the locking hole 14. By folding it back, the stacked plates are fixed together. At this time, the above At the edge of the hole in the plate 13, there is a cutout 1 that is slightly larger than the folded protrusion 12a. 5 is provided, and when the protruding piece 12a is folded back, the upper outer plate 1 is 1 is depressed into the missing part 15 of the middle plate 13, and the surface of the outer plate 11 and the protruding piece 12a are They are molded and fixed so that the surfaces of the two surfaces are approximately in the same plane.

[0011] When fixing the laminated plate by folding back the protruding piece 12a, the laminated thickness T ₁ of the intermediate plate 13 provided with the cutout portion 15 is set to be the same as or slightly thicker than the thickness t ₁ of the protruding piece 12a. It is desirable that the gasket surface be made uniform despite the presence of the protruding piece 12a when the gasket is mounted on the engine and tightened. If each protruding piece 12a is formed to be located within the notch 16 of the cylinder block, it is not necessary to make the surface uniform.

0012 Furthermore, all of the protrusions 12a may be formed in the same direction, but 11, 12 and the middle plate 13 are securely engaged with each projecting piece 12a so that they do not shift relative to each other. In order to avoid this problem, it is necessary to form some protrusions in a different direction than other protrusions. is desirable. In this case, each projecting piece is connected to a plurality of glues with different directions in at least two directions. Although it is sufficient to provide the This is to form four groups with different orientations.

[0013] The location and density of the fixing holes 14 on the gasket are determined by the gas The rigidity of the entire gasket varies depending on the size of the entire gasket, the number of laminates, etc. The desired effects, such as improving the properties of the laminate and suppressing the occurrence of irregularities in the laminates, were not achieved. It is determined empirically to the extent that

[0014] In this way, the locking hole 14 is drilled in the gasket surface, and the hole edge of the locking hole 14 is protruded. By forming the piece 12a, the protruding piece 12a protrudes outward from the edge of the gasket. As in the case where the outer panel 12 is formed by extending it, the area of the outer panel 12 increases and the amount of sheet metal used increases. There is no need to cut or waste when cutting sheet metal, and the yield rate is reduced. improves.

[0015] Further, the outer plates 11, 12 and the middle plate 13 are completely fixed by the protrusion 12a. Therefore, problems such as irregularities in the outer peripheral edge of the gasket, deformation, and reduced accuracy can be eliminated. can be done. Therefore, uniform seal surface pressure can be obtained at the interface with the engine. This can increase the sealing effect.

A second embodiment of the present invention shown in FIG. 4 uses a plurality of middle plates 23, 24, 25, similarly provides a locking hole 26, and attaches a protrusion 22a to the hole edge of the lower outer plate 22. The projecting piece 22a is folded back onto the upper outer plate 21, and a cutout 27 is provided at the hole edge of some of the middle plates 23, 24, and the middle plate 23 with the cutout 27 is formed. , 24 is formed to be the same as or slightly thicker than the thickness _{t 2 of} the protruding piece 22a (see FIG. 5). In this case, in the cutout portion 27, a bead can be provided on the middle plate 25 that does not have the cutout portion 27 so that its tip touches the inner surface of the outer plate 21. This bead is effective for holding the outer plate 21 and the protruding piece 22a in the missing portion 27 in a predetermined position.

[0017] In addition, when using a plurality of middle plates 23, 24, 25 in this way, the above-mentioned missing part 2 7 can be formed on all the middle plates, and the protruding pieces 12a, 22a can be formed on the upper part. It is configured to be provided on the outer panels 11 and 21 and folded back onto the lower outer panels 12 and 22. You can also.

[0018]

[Effect of the idea]

According to the metal laminated gasket of the present invention described in detail above, Since a bundling hole is drilled and a protruding piece is formed on the edge of the bundling hole, the protruding piece is insulated with gas. Increased use of sheet metal, such as when forming a jacket that projects outward from the edge. There is no waste during cutting or cutting, and the yield is improved.

[0019] Moreover, by fixing the laminated outer and middle plates with the above-mentioned protrusions, the gas In addition to increasing the rigidity of the entire bracket, it eliminates inconveniences such as unevenness of the middle plate, and improves accuracy. It is possible to obtain a thin gasket, and it is also possible to obtain a gasket that is sandwiched between the cylinder block and cylinder head. Improves sealing performance by applying uniform surface pressure on joint surfaces that are pressed. be able to.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a first embodiment of the metal laminated gasket of the present invention.

FIG. 2 is an enlarged view of essential parts of the gasket.

FIG. 3 is an enlarged sectional view taken along line AA in FIG. 2;

FIG. 4 is a sectional view of a main part showing a second embodiment of the gasket of the present invention.

FIG. 5 is a sectional view of the gasket in FIG. 4 in a tightened state.

FIG. 6 is a plan view of a conventional example.

7 is a cutaway perspective view taken along line BB in FIG. 6. FIG.

[Explanation of symbols]

11, 12, 21, 22 Outer plate 13, 23, 24, 25 Middle plate 14, 26 Binding hole 15, 27 Missing part T ₁ , T ₂ Lamination thickness of middle plate with missing part t ₁ , t ₂ Thickness of protrusion

Claims (3)

[Scope of utility model registration request] Claim 1: In a metal laminated gasket assembled by laminating three or more outer plates and middle plates made of metal plates, locking holes penetrating the outer plate and the middle plate are drilled at multiple locations within the gasket surface. At the same time, a protruding piece is provided on the hole edge of one outer plate, and the protruding piece is folded back onto the other outer plate at the fixing hole, thereby fixing each laminated plate to the other plate. Metal laminated gasket. [Claim 2] Provide a notched part slightly larger than the folded protruding piece on the hole edge of the intermediate plate, and make the laminated thickness of the intermediate plate provided with the notched part the same as or less than the thickness of the protruding piece. 2. The metal laminated gasket according to claim 1, wherein the metal laminated gasket is formed to be slightly thicker. 3. The metal laminated gasket according to claim 1 or 2, wherein some of the protruding pieces are formed in a direction different from that of other protruding pieces.