JP2000130591A - Cover gasket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve handleability and sealability by composing a cover gasket of an elastic body and an insert member in a sealing member which seals a portion between a cover member of an engine and an attaching member. SOLUTION: A cover gasket 3 is composed of a sealing member and a beam member. A projection 3a is formed on an outer side surface of the elastic cover gasket 3. The projection 3a is surrounded by a reinforcing beam 4 for integration. The form of the cover gasket 3 is accurately kept for improving handlability. In assembling line, the cover gasket 3 can be automatically mechanically attached to a cover member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing material for sealing a cover member and a mounting member in an engine mounted on an automobile or the like, and more specifically, to a cover gasket formed of the elastic body and an insert material. Related to shape improvement.

[0002]

2. Description of the Related Art Conventionally, a gasket for sealing a cover member such as a cylinder head cover or an oil pan of an engine mounted on an automobile or the like has a square or round shape made of an elastic material such as synthetic rubber, cork or synthetic resin. Is known. These annular gaskets are tightened and press-fitted between the cover member and the mounting member by a tightening tool such as a bolt or the like, and are brought into close contact with each other due to their compression elastic deformation to exert a required sealing action.

[0003]

However, such an annular gasket cannot meet the recent demands for weight reduction and various demands for easy mounting. That is, the gasket made of a material having a sufficient mass and improved deformation adhesion does not maintain an accurate shape due to its softness, and has a great difficulty in handling properties, for example, workability in transporting or mounting to a cover member. In the assembly line, the gasket is easily displaced because the cover member is turned upside down after mounting on the cover member, and it is easy to cause gasket misalignment. A secure mounting structure was required. Further, in recent years, there has been a demand for an automatic assembly of a gasket to a cover member using a robot or the like in an engine assembly line. Hereinafter, this will be described in detail with reference to the drawings.

[0004] Under such circumstances, in order to improve the handleability of the gasket main body (31) as shown in FIG. A gasket in which 3b) is embedded to give a certain degree of rigidity has been proposed. However, this gasket does not have the insert member (3b).
The insert material (3), which does not have a useful effect other than increasing the rigidity and maintaining the shape by embedding the gasket, and depending on the shape, leads to the inside of the gasket body (31).
b) had a major disadvantage that adversely affected the sealing action. The present invention has been made in view of the above-described drawbacks, and has as its object to provide a cover gasket that has improved handleability and improved sealing performance.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. As shown in FIGS. 1 to 5, a cover member (1) for covering a cylinder head or a cylinder block of an automobile engine and a mounting member (FIG. 1). 2), a cover gasket made of a sealing material such as an elastic material such as synthetic rubber or synthetic resin and a rod material made of a synthetic resin material for sealing the cover member (1) and the mounting member (2). (3) A projection (3a) having a shape with a thicker end protruding from the outer surface of the cover gasket (3), and an appropriate distance from the outer surface of the cover gasket (3). The reinforcing rod (4) formed so as to enclose the thick protrusion (3a) is integrally disposed.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention has the following excellent functions with the above structure. As described above, the cover gasket (3) of the present invention is provided with a reinforcing rod (3) that wraps the thick protrusion (3a) at an appropriate distance from the front surface (3a) projecting from the outer surface. 4) is provided,
The reinforcing rod (4) gives a great advantage in handling and mounting work to the cover member, and in an automobile assembly line, the reinforcing rod (4) located on the outer surface obtains sufficient rigidity to maintain an accurate shape. It has a sealing material structure that shows its properties and can be automated 100%.

More specifically, in mounting the cover gasket (3), as shown in FIG. 2, the cover gasket (3) is inserted between the cover member (1) and the mounting member (2) and tightened. The cover gasket (3) tightened by the member (1) and the mounting member (2) is compressed and forced to deform laterally. However, the elastic portion of the body portion of the cover gasket (3) is an independent portion which is not affected at all by other portions since the reinforcing rods (4) are arranged with a certain distance therebetween. Rarely cause irregular distortion.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to carry out the present invention, in FIG. 2, a reinforcing rod (4) is arranged in a state sandwiched between a cover member (1) and a mounting member (2). When formed from a hard synthetic resin, it becomes a clear striking material that can regulate the tightening dimension, and can appropriately maintain the surface pressure of the elastic portion of the cover gasket (3). As a means for enhancing the size control action, a pin or a collar (shown as a collar 6 in the figure) penetrating up and down into the positioning hole (5) as shown in FIG. 3 can be buried. This results in a secure tightening interval.

On the other hand, as shown in FIG. 5, it is possible to arrange the reinforcing rod (4) so as not to be sandwiched between the cover member (1) and the mounting member (2). Later, a flexible elastic projection (3a) is pulled out of the reinforcing rod (4) and disassembled, and the reinforcing rod (4) is recovered, so that it can be used repeatedly from molding to carrying.

As shown in FIG. 1, the positioning hole (5) is provided in a mounting portion of the reinforcing rod (4) with the cover member (1) or the mounting member (2), or as shown in FIG.
As shown in (1), a positioning hole (5) can be provided between the thick portion of the projection (3a) and the gasket main body, and any structure has no effect on the elastic portion of the cover gasket (3). It is important that the arrangement is not given.

In the formation of the cover gasket (3) and the reinforcing rod (4), an elastic portion made of a sealing material is previously formed together with the projection (3a), and thereafter, from the outer surface of the elastic portion. It is a desirable shaping method to form the reinforcing rod (4) so as to enclose the protruding portion (3a) in a mold arrangement with an appropriate spacing, in which a material formed at a high temperature is formed into a material formed at a low temperature. This makes the manufacturing method easy to integrate.

[0012]

According to the present invention, the reinforcing rod (4) is excellent in handleability to accurately maintain the shape of the cover gasket (3) due to an appropriately spaced mounting position and its rigidity. Grabbing (4) facilitates automatic mechanical assembly to the cover member (1) in the engine assembly line. And such a shape maintaining property does not exert any deformation effect on the elastic portion, and the sealing performance of the sealing material is not neglected. In addition, its dimensional control action relaxes the permanent compression set of the elastic body and promises good sealing for a long period of time.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view showing a mounted state of the present invention.

FIG. 3 is a cross-sectional view showing another mounting state of the present invention.

FIG. 4 is a schematic sectional view showing another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing another mounting state of the present invention.

FIG. 6 is a sectional view of a conventional structure not using the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover member 2 Mating member 3 Cover gasket 3a Projection 4 Reinforcement rod 5 Positioning hole 6 Collar

Claims (5)

[Claims] 1. A cover gasket mounted between a cover member and a mounting member to seal the two members, wherein the cover gasket made of an elastic body protrudes from an outer surface of the cover gasket with a thicker end. A cover gasket, wherein a protrusion is formed, and a reinforcing rod formed so as to surround the protrusion by being spaced apart from an outer surface of the cover gasket is disposed. 2. The cover gasket according to claim 1, wherein a positioning hole is provided in a mounting portion of the reinforcing rod with a mounting member. 3. The positioning hole according to claim 1, wherein a pin or a collar penetrating vertically is buried in the positioning hole.
Or cover gasket according to any one of the above (2) 4. The cover gasket according to claim 1, wherein the reinforcing rod is disposed between the cover member and the mounting member. 5. A cover gasket mounted between a cover member and a mounting member for sealing the two members,
The gasket portion of the cover gasket integrated with the reinforcing rod by the protrusion is attached to a portion between the cover member and the mounting member, and then the reinforcing rod is disassembled and removed. 2. A cover gasket according to any one of 2 to 3 or 4.