JPH11315926A - Laminated metal gasket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the detection of mistaken constitution by a plurality of different ranking constituting plates for a laminated metal gasket to be constituted of a plurality of identical ranking constituting plates. SOLUTION: A laminated metal gasket is constructed in such a manner that a plurality of constituting plates having ranking classes for the gasket are provided with notches corresponding in number to numbers in a ranking order and viewing signs 16 such as through-holes, and the viewing sings of the same ranking are arrayed in the same position and a position different from those of the viewing sings of the other ranks. Constituting plates having no ranking classes are formed to be viewed from all the positions of all the viewing signs of the respective ranks of the constituting plates having ranking classes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated metal gasket used as an engine cylinder head gasket or the like when the constituent plates of the gasket have ranks such as thickness. The present invention relates to a gasket in which lamination can be easily detected.

[0002]

2. Description of the Related Art A laminated metal gasket is known which is capable of easily detecting an erroneous lamination order of the constituent plates of a laminated metal gasket or an erroneous lamination such as a missing plate of a laminated plate by visual inspection or by using optical means. For example,
No. 6 and Japanese Patent Publication No. 8-30537.

On the other hand, since the gap between the piston and the cylinder head, the so-called top clearance, affects the output and exhaust gas of the engine, the top clearance is strictly controlled and gaskets of several ranks differing only in thickness are used. The so-called select assembly which is selectively assembled is adopted.

[0004]

As a gasket for select assembly, for example, there are an upper and lower two-layer surface plate having three thickness rank types and an intermediate plate having no thickness rank type and a constant thickness. And a laminated metal gasket in which both upper and lower surface plates have the same thickness rank may be used. As described above, in the laminated metal gasket in which the component plates having the rank types are included in two layers, and the two-layer component plates have the same rank, the two-layer component plates are erroneously determined to have different ranks. In such a case, this cannot be effectively detected by the conventional mis-lamination detecting means such as the means described in the above-mentioned publication.

[0005] The reason for this is that, as described above, the conventional erroneous lamination detecting means includes a component plate group that constitutes one gasket such as an error in the lamination order of component plates, a missing component plate, or an overlap of the same component plate. In this case, if the component plate is, for example, the first plate (upper plate), all the components have the identification sign of the first plate regardless of the type of the rank. Is not assumed and cannot be detected.

The above-mentioned rank types are not only applied to the thickness of a component plate as in a gasket for select assembly, but also, for example, the coating thickness of a sealing material layer such as fluoro rubber coated on the surface of the component plate. It is also applicable to the type of pod material.

The present invention has been made in view of the above points, and an object of the present invention is to provide a laminated metal in which at least two constituent plates having a certain rank are included, and these constituent plates must have the same rank. In a gasket, it is an object to easily detect erroneous lamination using constituent plates of different ranks on constituent plates that should have the same rank.

[0008]

A laminated metal gasket according to the present invention that achieves the above object comprises at least two component plates of the same rank among component plates having different ranks, or such a component plate is laminated. A laminated metal gasket comprising at least two layers of component plates and a component plate having no rank type, wherein the component plates of each rank are provided with transparent marks such as cutouts and through holes in a number corresponding to the rank order number. The see-through markers of the same rank are arranged at the same position and at positions different from the positions of the see-through markers of the component boards of other ranks. In addition, a component plate having no rank type is formed so as to be able to be seen through all positions of the transparent markers of each rank of the component plate having the rank type.

In the laminated metal gasket according to the present invention having the above-described structure, when all the constituent plates having a type of rank included in the gasket are correctly formed using the same rank constituent plate, these gaskets have the same structure. Since the positions of the transparent markers of all the constituent plates coincide, the transparent portions penetrating the gasket in the thickness direction (the laminating direction) are formed on the gasket by the number corresponding to the order number of the corresponding rank. Thereby, the rank and grade of the gasket can be displayed.

[0010] On the other hand, when one of the constituent plates of another rank is erroneously laminated in the constituent plates having the type of rank, the positions of the see-through markers do not overlap, and the see-through markers are not overlapped. Since it is closed by the rank component plate, no see-through portion penetrating the gasket in the thickness direction is formed.
Therefore, the detection light cannot be transmitted and the detection pin does not pass.
It can be easily determined by visual inspection that the see-through markers such as cutouts and through holes at all positions are closed. That is, according to the laminated gasket of the present invention, erroneous lamination in which component plates of different ranks are mixed in a laminated gasket to be composed of component plates of the same rank can be easily detected.

However, in the gasket of the present invention, for example, the upper and lower surface plates of the same rank are correctly formed by the upper and lower surface plates having the same rank, but the lamination order is incorrect, and An erroneous lamination in which the face plates are exchanged, that is, an erroneous lamination in a group of constituent plates constituting one gasket is not detected. Such mis-lamination detection is performed by a conventional mis-lamination detection means described in the above-mentioned publication or the like, which is installed on the gasket separately from the see-through mark in the gasket of the present invention, if necessary.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details and embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a cylinder head gasket G1 according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view illustrating the gasket G1. However, in both FIGS. 1 and 2, bolt holes other than the combustion chamber hole 15,
Illustration of a water hole, an oil hole, etc. is omitted. The gasket G1 of the first embodiment is formed by laminating two upper and lower surface plates 11 and 12 made of a stainless steel plate or the like so as to overlap each other.

The gasket G1 is a gasket for select assembly and has a different thickness depending on the rank. The surface plates 11 and 12 constituting this have also ranks having different thicknesses, and the gasket G1 is configured by the plate plates 11 and 12 of the same rank. That is, the rank 1 gasket G1 is constituted by the rank 1 face plates 11 and 12,
The second rank gasket G1 is the second rank face plate 11
And 12.

The surface plates 11 and 12 of each rank are notched in the peripheral portion thereof which does not affect the sealing performance and have a transparent mark 16 such as a through hole, and the number of the transparent marks 16 is equal to the ordinal number of the rank. . That is, the surface plates 11 and 12 of rank 1 are 1
Face plates 11 and 1 of rank 2
2 has two transparent markers 16. FIGS. 1 and 2 show a rank 2 gasket G in which rank 2 face plates 11 and 12 having two see-through markers 16 are stacked at the same position.
1 is shown.

As shown in FIG. 3, the perspective markers of each rank are arranged at positions that do not overlap with the perspective markers of different ranks. That is, as shown in FIG. 3 (a), one transparent marker is arranged at the position 1 on the surface plate of rank 1 and two transparent markers are provided on the surface plate of rank 2 as shown in FIG. 3 (b). 2 and 3, and three see-through markers are arranged at positions 4, 5, and 6 on the surface plate of rank 3, as shown in FIG. Perspective markers of the same rank are arranged at the same position.

Therefore, as shown in FIG. 2, when the gasket G1 is correctly constituted by the face plates 11 and 12 of the same rank, the transparent markers 16 of both face plates are arranged at the same position. Gasket G1 thickness direction
The number of see-through portions 17 penetrating in the (stacking direction) is formed by the number equal to the rank order number. Thereby, the rank of the gasket G1 is displayed.

On the other hand, when the gasket G1 is erroneously constituted by the surface plates 11 and 12 having different ranks, for example, when the gasket G1 is constituted by the surface plate 11 of rank 2 and the surface plate 12 of rank 3. As can be easily understood from FIG. 3, the see-through marker is closed by another surface plate having a different rank, and no see-through portion penetrating in the thickness direction of the gasket is formed. These correct / incorrect states can be easily determined by inspecting the transparent marker by optical means, by a detection pin, or by visual inspection, and an erroneous stack with an incorrect rank can be easily detected.

The case where the gasket G1 of the first embodiment has two upper and lower surface plates has been described above. However, even when the intermediate plate laminated between the upper and lower surface plates has the same rank as the surface plate, Misstacking can be detected in exactly the same manner as described above. In other words, the intermediate plate may be provided with the same transparent markers as the front plates 11 and 12. Further, it is not always necessary that the surface plates 11 and 12 have the same thickness, and it is sufficient that the ranks are the same.

FIG. 4 is an exploded perspective view illustrating a cylinder head gasket G2 according to a second embodiment of the present invention. The gasket G2 is also a gasket for select assembly, and includes upper and lower two-layer surface plates 11 and 12 and an intermediate plate 13 interposed between the surface plates 11 and 12.
They are stacked so as to overlap each other. Surface plates 11 and 1
2 has a rank type for thickness, and gasket G
The two surface plates 11 and 12 have the same rank. Intermediate plate 1
No. 3 has no rank type, and the thickness of the intermediate plate is constant.

The surface plates 11 and 12 of each rank are provided with the same number of see-through signs as the rank order numbers, similarly to the gasket G1 of the first embodiment. FIG. 5 (a), (b) and (c) show the number of see-through markers of each rank of the front plates 11 and 12 having the rank type and the positional relationship to be arranged. FIG. 3 illustrates the example gasket G1.
(B) The number and arrangement positional relationship of the see-through markers in (b) and (c) are the same. When an intermediate plate having the same type of rank as the surface plates 11 and 12 is further added, this intermediate plate is also provided with a transparent marker at each rank, similarly to the surface plates 11 and 12.

The gasket G2 includes an intermediate plate 13 having no rank type. As shown in FIG. 5 (d), the intermediate plate 13 has a transparent marker for each rank of the front plates 11 and 12 having a rank type. The intermediate plate 13 is completely neutral with respect to the see-through marker, because it has a see-through window 18 which can be seen through all arrangement positions, and is equivalent to absent. Therefore, in the same manner as described above for the gasket G1,
If the gasket G2 is correctly constituted by the faceplates 11 and 12 of the same rank, a number of see-through see-through portions equal to the order number of the rank is formed, whereby the gasket G is formed.
A rank of 2 is displayed. When the gasket G2 is erroneously constituted by the surface plates 11 and 12 of different ranks, the see-through portion penetrating in the thickness direction of the gasket is not formed. Therefore, an error can be easily detected. In addition,
Instead of the see-through window 18, the see-through marker 16 may be provided at all positions of the see-through markers of each rank of the surface plates 11 and 12.

FIG. 6 shows a cylinder head gasket G3 according to a third embodiment of the present invention. The gasket G3 is composed of upper and lower surface plates and a two-layer intermediate plate 1 interposed therebetween.
3 and 14. Contrary to the gasket G2 of the second embodiment, the intermediate plates 13 and 14 have a rank type, and the front plates 11 and 12 have no rank type. The intermediate plates 13 and 14 of the gasket G3 have the same rank.

In the gasket G3, the intermediate plates 13 and 14 are provided with see-through markers shown in FIGS. 5A, 5B and 5C according to their rank. That is, the intermediate plates 13 and 14 of rank 1 have one see-through marker at the position 1 shown in FIG. 5 (A), and the intermediate plates 13 and 14 of rank 2 have the transparent markers 2 and 3 shown in FIG. There are two see-through markers at positions, and the intermediate plate of rank 3 has three see-through markers at positions 4, 5, and 6 shown in FIG. FIG. 6 shows a rank 2 gasket G3 including rank 2 intermediate plates 13 and 14. FIG.

As shown in FIG. 5 (d), the front plates 11 and 12 having no rank type can be seen through all positions of the transparent markers of each rank of the intermediate plates 13 and 14, that is, the positions 1 to 6 in FIG. A possible viewing window 18 is provided. Accordingly, in the gasket G3, the front plates 11 and 12 are neutral with respect to the see-through marker 16. When the gasket G3 is correctly formed by the intermediate plates 13 and 14 of the same rank, a number of see-through portions penetrating in the thickness direction of the gasket equal to the ordinal number of the rank are formed to indicate the rank of the gasket; When G3 is erroneously formed by the intermediate plates 13 and 14 having different ranks, a see-through portion penetrating the gasket in the thickness direction is not formed, and therefore, it is easy to mistakenly stack the gasket G3 with the wrong rank. Is the same as that described in detail for the gasket G1 of the first embodiment.
It is also the same as the gasket G2 of the second embodiment that the transparent marker 16 may be provided at the entire position of the transparent marker of each rank instead of the transparent window 18.

Although the present invention has been described with reference to a cylinder head gasket exclusively, the present invention is not limited to a cylinder head gasket but can be widely applied to a laminated gasket having a rank type. Further, the type of rank is not limited to the thickness of the gasket and the thickness of the component plate.For example, regarding the coating thickness of the sealing material layer coated on the surface of the component plate of the laminated metal gasket or the type of the material type Is also applicable as described above. For example, in the same type of cylinder head gasket, the sealing material layer may be selectively used for fluoro rubber and silicone rubber depending on the magnitude of the output of the engine. In such a case, the present invention can be advantageously applied.

[0026]

According to the present invention, a laminated metal gasket to be formed by a plurality of component plates having the same rank is erroneously formed by a plurality of component plates having different ranks. Lamination can be easily detected. Further, when the gasket is correctly constituted by a plurality of constituent plates of the same rank, the rank of the gasket can be indicated by the number of transparent portions penetrating therethrough.

[Brief description of the drawings]

FIG. 1 is a plan view of a gasket according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view illustrating the gasket of the first embodiment.

FIG. 3 is an explanatory view of a see-through mark of the gasket of the first embodiment.

FIG. 4 is an exploded perspective view illustrating a gasket according to a second embodiment of the present invention.

FIG. 5 is an explanatory view of a see-through marker of a gasket of the second embodiment and the third embodiment.

FIG. 6 is an exploded perspective view illustrating a gasket according to a third embodiment of the present invention.

[Explanation of symbols]

 11, 12 Surface plate 13, 14 Intermediate plate 15 Combustion chamber hole 16 Transparent sign 17 Transparent part 18 Transparent window

Claims (5)

[Claims] 1. A laminated metal gasket formed by laminating at least two component plates of the same rank among component plates having a rank type, wherein the component plates of each rank have a number corresponding to the order number of the rank. A laminated metal gasket comprising a transparent mark such as a notch or a through hole, wherein the transparent marks of the same rank are arranged at the same position and different from the positions of the transparent marks of other ranks. 2. A laminated metal gasket comprising at least two layers of component plates of the same rank among component plates having a rank type and a component plate having no rank type, wherein the component plates of each rank are of a rank. A number of cutouts and through-holes, etc., corresponding to the ordinal numbers are provided, and see-through signs of the same rank are arranged at the same position and at positions different from the positions of the see-through signs of the component boards of the other ranks. A laminated metal gasket, characterized in that the component plate having no mark is formed so as to be able to be seen through all positions of the transparent markers of each rank of the component plate having a rank type. 3. The laminated metal gasket according to claim 1, wherein at least two of the at least two-layer component plates in which component plates of the same rank are laminated are surface plates. 4. The laminated metal gasket according to claim 2, wherein the at least two-layer component plates obtained by laminating component plates of the same rank are intermediate plates. 5. The laminated metal gasket according to claim 1, wherein the type of the rank is the type of the thickness of the component plate.