JPH088335Y2 - Washer seal mounting structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer seal mounted between a tightening tool and a fixing member, and specifically, an improved washer seal mounting structure having both good mounting workability and vibration damping property. Regarding

[0002]

2. Description of the Related Art Conventionally, to mount and fix a cover member such as an engine rocker cover or an oil pan,
Tightening tools are arranged in various places of the cover member and tightened together with the gasket mounted around it.
A seal washer made of an elastic body is mounted between the tightening tool and the cover member in order to prevent vibration of the tightening tool and sound of the cover member.

A detailed description will be given below with reference to the drawings. In most of these structures, as shown in FIG. 3, a ring-shaped elastic body (4) and a ring-shaped metal washer (7) are arranged and integrated above the elastic body (4) to form a washer seal (a). This is the cover member (2) together with the bolt (3).
The cover member (2) and the gasket (1) mounted on the cover member (2) were attached and fixed by applying a tightening force to the bolt (3).

[0004]

However, in such a mounting structure of the cover member (2), the elastic body (4) of the washer seal (a) and the gasket (1) are provided.
Since there is no means to adjust the elastic force of
It is not suitable for automated tightening in automobile engine assembly lines.

That is, the elastic rest (4) and the gasket (1), which are made of synthetic rubber or the like, have a certain width as the optimum tightening pressure for maintaining the performance even though there is a slight difference in hardness. Yes, generally tightening torque, 10 kgf · cm
It is considered that the range is up to 80 kgf · cm, and when a load larger than this is applied to the elastic body (4) and the gasket (1), the torque is reduced (stress relaxation) and excessive lateral flow deformation causes a failure. There is a risk.

Even with the elastic body (4) and the gasket (1) for which such a tightening pressure is required, it is difficult to adjust and tighten the respective tightening points in the automatic assembly line or the like. The tightening tool set to the required maximum tightening torque tends to process all tightening points, and the elastic body (4) and the gasket (1) are inevitably over-tightened. is the current situation. In view of such a serious drawback, the present invention has an object to provide a seal washer having a self-tightening regulating function that does not relax stress and having a good vibration-proof property that can withstand long-term use.

[0007]

As shown in FIG. 1, the present invention resides in a cover member (2) having a gasket (1) attached to its periphery, and a bolt (3) for attaching and fixing the cover member (2).
A washer seal (A) mounting structure comprising an elastic body (4) used together with a reinforcing plate (5), wherein the cover member (2) has a flange portion (21) for fastening the gasket (1). The washer seal (A) has a substantially U-shape that sandwiches the flange portion (21) from the outside, and through holes (41) through which the bolt (3) passes are arranged in the upper and lower portions thereof. The bolt (3) is characterized in that it is attached to the sealing member (6) by penetrating the through hole (41) and the bolt hole (22) formed in the flange portion (21).

Further, as shown in FIG. 2, the reinforcing plate (5) is a substantially U-shaped metal reinforcing plate (51).

[0009]

The present invention has the following excellent effects due to the above structure. As shown in FIG. 1, the washer seal (A) of the present invention has a flange portion (2) of the cover member (2).
1) is configured to be sandwiched by its substantially U-shape from the outside. When this is mounted together with a bolt (3) at a predetermined position of the flange portion (21) and the bolt (3) is tightened, the washer is first The substantially U-shaped upper portion of the seal (A) transmits the tightening pressure to the flange portion (21) to compress the sealing member (6) and the gasket (1) located between the flange portion (21), At the same time, the lower portion of the washer seal (A) having a substantially U-shape, that is, the portion sandwiched between the flange portion (21) and the sealing member (6) is also compressed. Therefore, in this state, the compressive force applied to the flange portion (21) is applied to the gasket (1) and the washer seal (A).
The washer seal (A) exerts a useful spacer action on the gasket (1) and gives an optimum tightening pressure to the gasket (1). .

[0010]

EXAMPLES To implement the present invention, in order to enhance the spacer action on the gasket (1), the hardness of the elastic body (4) of the washer seal (A) is made higher than that of the gasket (1), or It can be realized in any way by increasing its mass such as thickness, width, number of installations, etc. Moreover, as shown in FIG. On the other hand, it is also possible to obtain it by using a substantially U-shaped reinforcing plate (51) whose size can be regulated.

In the installation structure, in addition to the structure in which the bolts (3) are individually attached, a plurality of the bolts (3) arranged at appropriate intervals are formed in a laterally elongated shape. The shape of the through hole (41) for holding the bolt (3) may be a long hole or a deformed shape hole such as a notched hole which is partially cut out in the axial direction in consideration of the mountability. It is also possible to carry out.

[0012]

According to the present invention, with the above-described mounting structure, the gasket (1) sandwiched between the cover member (2) and the sealing member (6) is placed under an optimum tightening pressure, and the torque is reduced. It exerts a strong sealing force for a long period of time without stress relaxation. Therefore, it is possible to tighten an excessive torque in an automatic assembly line or the like, and greatly improve the work efficiency. In addition, the washer seal (A) has a structure that bundles the flange portion (21) of the cover member (2) from the lateral direction as described above, and this structure has a strong vibration damping action against lateral vibration.

[0013]

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a washer seal mounting structure of the present invention.

FIG. 2 is a sectional view showing another embodiment of the washer seal of the present invention.

FIG. 3 is a cross-sectional view showing a conventional structure without using the present invention.

[0014]

[Explanation of symbols] 1 gasket 2 cover member 21 flange portion 3 bolt 4 elastic body 41 through hole 5 reinforcing plate 51 substantially U-shaped reinforcing plate 6 sealing member A washer seal

Claims (2)

[Scope of utility model registration request] 1. A cover member (2) having a gasket (1) attached, which comprises an elastic body (4) used together with a bolt (3) for attaching and fixing the same and a reinforcing plate (5). In the mounting structure of the washer seal (A): the cover member (2) has a flange portion (21) for tightening the gasket (1), and the elastic body (2) of the washer seal (A ) is the flange portion. It has a substantially U-shape that sandwiches (21) from the outside, and through holes (41) through which the bolts (3) pass are arranged in the upper and lower parts thereof, and the bolts (3) are provided with the through holes ( washer seal mounting structure characterized by mounting et al is the sealing member (6) through the formed bolt holes (22) to 41) and the flange (21). 2. The washer seal mounting structure according to claim 1, wherein the washer seal (A) is provided with a substantially U-shaped reinforcing plate (51).