JP2539276Y2 - Metal laminated gasket - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a metal laminated gasket.

[0002]

2. Description of the Related Art For example, there is known a type of a metal-laminated gasket mounted between a cylinder block and a cylinder head of an internal combustion engine, in which a plate composed of two metal plates is laminated. . This gasket is shown in FIG.
As shown in FIG. 1, a main plate 1 having a bore turn-back portion 4 for sealing around a combustion chamber hole 3 and a bead plate 2 having a bead 5 are provided. By folding back the projecting pieces 6 protruding at a plurality of places on the other plate 2, these plates 1 and 2 are folded.
Are fixed to each other.

However, if the protruding piece 6 is protruded from the outer peripheral edge of the plate 1, the area of the plate 1 is increased by the amount of the protruding piece 6, and not only the amount of sheet metal used is increased, but also
Since the sheet metal is easily wasted when it is cut, a protruding piece is provided at a position facing the outer peripheral edge of the plate 1 in order to improve the yield as much as possible. However, such a configuration tends to cause a displacement in the direction of the opposite side where no protruding piece is provided.

[0004] Such a problem is a problem in a gasket of the type in which the bead plate 2 is not narrowly inserted into the bore turn-up portion 4 of the main plate 1 as shown in the figure, since the two plates are particularly likely to be misaligned. Is required to be fixed.

[0005]

The problem to be solved by the present invention is that, in a metal-laminated gasket in which two metal plates are laminated, the respective plates are displaced during mounting work on an internal combustion engine such as an engine. The purpose is to prevent

[0006]

The present invention for solving the above problems SUMMARY OF THE INVENTION, in the metal laminate type gasket formed by laminating a plate made of two metal plates, four in the gasket surface
While drilling a fixing hole through both plates in the corner ,
Protrusions are provided on the edge of each fixing hole on one plate,
These protruding pieces are adjacent 90 degrees each other.
The two plates are fixed to each other by being formed in different directions, and by folding each protruding piece on the other plate in each fixing hole.

[0007]

In the metal-laminated gasket having the above structure, the edge of the fixing hole provided in the gasket surface has a projection.
The direction of the protruding pieces of the fixing holes located at the four corners
The plates are formed so as to differ from each other by 90 degrees, so that the plate is securely fixed by each protruding piece , and both plates are vertically and horizontally mounted when mounting to an internal combustion engine such as an engine. In addition, it is possible to prevent the positional deviation in the rotation direction and to solve problems such as irregularity of the outer peripheral edge of the gasket, deformation and reduction in accuracy.

[0008]

1 to 3 show a cylinder head gasket according to an embodiment of the present invention.
12. That is, the main plate 1 provided with the seal return bore portion 14 around the combustion chamber hole 13.
1 and a bead plate 12 having a bead (not shown) by laminating the bead plate 12 without sandwiching the bead plate 12 in the bore turn-up portion 14 of the main plate 11. The configuration is the same as the conventional one, but differs from the conventional one in the means for fixing the plates 11 and 12.

That is, both plates 11 and 12 are located at positions near the four corners in the gasket plane.
Are formed, and projecting pieces 16a to 16d are provided at the edge of each fixing hole 15a to 15d in one plate 11, and these projecting pieces 16a to 16d are provided.
Are formed so that the adjacent ones are oriented in directions different from each other by approximately 90 degrees, and each protruding piece 16a to 16d is folded back on the other plate 12 in each of the fixing holes 15a to 15d, so that the two plates 11 , 12 are fixed to each other. In the one shown in FIG.
6d are formed in four directions so that the directions are different from each other by approximately 90 degrees, and the projecting pieces 16a and 16
c and 16b and 16d are oriented in directions different from each other by approximately 180 degrees, and adjacent protruding pieces are approximately 90 degrees from each other.
They are facing different directions at different degrees.

In the metal-laminated gasket having the above structure, the fixing holes 15a to 15a provided at the four corners of the gasket are provided.
The directions of the protruding pieces 16a to 16d of the hole edge of 15d are adjacent to each other.
The two plates 11 and 12 are securely fixed by the respective projecting pieces by being formed so as to be different from each other by 90 degrees , and the two plates 11 and 12 are vertically attached at the time of mounting work to an internal combustion engine such as an engine. In addition, it is possible to prevent misalignment in the lateral direction and the rotating direction, and to solve problems such as irregularity of the outer peripheral edge of the gasket, deformation, and reduction in accuracy.

Further, by arranging the projections so as to be positioned in the notches 17 of the cylinder block, a uniform sealing surface pressure can be obtained at the joint surface with an internal combustion engine such as an engine.

Note that, at the positions of the fixing holes 15a to 15d ,
In this case , since each protruding piece 16a to 16d protrudes on the gasket surface, in order to eliminate the influence of the protruding,
As shown by a chain line in FIG. 1, it is desirable that each protruding piece be located in the notch 17 of the cylinder block.

[0013]

According to the metal laminated gasket of the present invention, as described in detail above, the fixing provided at the four corners of the gasket.
The direction of the protruding pieces on the edge of the hole is 90 degrees between adjacent ones
Since each plate is different, the fixing of the plate by each protruding piece is ensured, and when mounting work to an internal combustion engine such as an engine, etc., both plates are displaced in the vertical direction, the horizontal direction, and the rotational direction. This prevents problems such as irregularities in the outer peripheral edge of the gasket, deformation, and a decrease in accuracy.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the gasket of the present invention.

FIG. 2 is an enlarged view of a main part of the gasket.

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

FIG. 4 is a partially omitted sectional view of a conventional example.

[Explanation of symbols]

 11 Main plate 12 Bead plate 15a-15d Fixing hole 16a-16d Protrusion

Claims (1)

(57) [Scope of request for utility model registration] 1. A metal-laminated gasket in which plates made of two metal plates are stacked, wherein fixing holes penetrating both plates are formed at four corners in the gasket plane, and each of the fixing holes in one plate is formed . <br/> Protrusions are provided at the edge of the hole, and these protrusions
A metal-laminated gasket characterized in that both plates are fixed to each other by being formed in directions different from each other by 90 degrees and by folding each protruding piece on the other plate in each fixing hole.