JP2005214222A - Gasket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gasket in which the workability is improved in attaching to equipment, and the need to manufacture with higher dimensional accuracy is reduced. <P>SOLUTION: The gasket 1 has a reinforcement ring 2 formed with a rigid material and a seal body 3 of a rubber-like elastic body which is fixed to the reinforcement ring 2, extending in the circumferential direction of the reinforcement, and compressively sandwiched between two surfaces opposite to the equipment. Notches 2a, 2b, 2c are installed in the reinforcement ring 2 to discontinue the reinforcement ring 2 in the circumferential direction so that the reinforcement ring 2 can be deformed in the diameter expanding direction and the diameter reducing direction, etc. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a gasket that is mounted between two opposing surfaces of equipment and seals between them, and more particularly to a gasket that is suitable for construction as a large gasket that is mounted between an engine head cover of an automobile and an engine. Is.

  Conventionally, in a gasket, a reinforcing ring formed of a rigid material and a seal made of a rubber-like elastic body that is fixed to the reinforcing ring and extends annularly in the circumferential direction of the reinforcing ring and is compressed and sandwiched between two opposing surfaces of the device And a reinforcing ring formed from an annular body that is continuous in the circumferential direction (see, for example, Patent Document 1 and Patent Document 2).

JP 11-294593 A JP 2002-243042 A

  In the above prior art, since the rigidity of the reinforcing ring formed from the annular body continuous in the circumferential direction is too high, the workability when the gasket is mounted on the device is poor, and the dimensions of the gasket mounting portion of the device are also low. Therefore, there is a problem that the reinforcing ring must be manufactured with high dimensional accuracy. In particular, when the gasket has a large size, it is troublesome to manufacture a reinforcing ring having a large size with high accuracy.

  The problem to be solved by the present invention is to solve the above-mentioned problems of the prior art, improve the workability at the time of mounting the gasket, and reduce the need to manufacture the reinforcing ring with high dimensional accuracy.

  In order to solve the above-described problems, the gasket of the present invention includes a reinforcing ring formed of a rigid material, and a ring that is fixed to the reinforcing ring and extends in the circumferential direction of the reinforcing ring, and is compressed between two opposing surfaces of the device. In a gasket having a rubber-like elastic sealing body to be sandwiched, at least one portion of the reinforcing ring is provided with a cut portion that makes the reinforcing ring discontinuous in the circumferential direction.

  According to the present invention, since the cutout portion is provided in the reinforcing ring, the reinforcing ring can be deformed in the diameter expansion direction, the diameter reduction direction, and the like when the gasket is attached to the device. Therefore, the gasket can be mounted while being deformed in accordance with the state of the portion to be mounted, workability at the time of mounting is improved, and the necessity of manufacturing the gasket with high dimensional accuracy is reduced.

In a preferred embodiment of the present invention, the cut portions are provided at a plurality of locations of the reinforcing ring, and the reinforcing rings are constituted by a plurality of reinforcing ring portions separated from each other in the circumferential direction by the cut portions.
Moreover, the said sealing body has a protrusion part which consists of a rubber-like elastic body which plunges into the said excision part, and fills the excision part.

  1 and 2 show a gasket 1 according to an embodiment of the present invention. The gasket 1 includes a reinforcing ring 2 made of a rigid material, and a rubber-like elastic body that is fixed to the reinforcing ring 2 and extends annularly in the circumferential direction of the reinforcing ring 2 and is compressed and sandwiched between two opposing surfaces of the device. And a sealing body 3 made of metal. In the illustrated embodiment, the seal body 3 is integrally formed with the reinforcing ring 2 and is fixed to the inner peripheral portion of the reinforcing ring 2. The fixing position of the seal body 3 does not necessarily have to be the inner peripheral portion of the reinforcing ring 2, and it is provided on the outer peripheral portion of the reinforcing ring, or on one or both of the flat portions 2 'and 2 "of the reinforcing ring. The reinforcing ring may be provided across a plurality of portions of the inner peripheral portion, the outer peripheral portion, and the flat portion.

  The reinforcing ring 2 is provided with three cutout portions 2a, 2b, and 2c that make the reinforcing ring 2 discontinuous in the circumferential direction. The reinforcing ring 2 is separated from each other in the circumferential direction by the cutout portions 2a, 2b, and 2c. It is composed of a plurality of reinforcing ring portions 2A, 2B, 2C. The seal body 3 is formed with projecting portions 3a, 3b and 3c made of a rubber-like elastic body and projecting outward in the radial direction, and these projecting portions 3a, 3b and 3c enter the cut portions 2a, 2b and 2c. The cut portions 2a, 2b and 2c are filled. The reinforcing ring 2 is formed with insertion holes 4a, 4b and 4c for positioning members for positioning the gasket on the device. As the positioning member, a bolt and a pin are used.

  It is not always necessary to provide the projecting portions 3a, 3b and 3c on the seal body 3 so as to enter the cut portions 2a, 2b and 2c. However, the strength of the gasket can be increased by causing the protruding portions 3a, 3b, and 3c to enter the cut portions 2a, 2b, and 2c.

  The gasket 1 of the illustrated embodiment has the above-described configuration, and the reinforcing ring 2 has the cut portions 2a, 2b, and 2c, and therefore can be deformed in the diameter increasing direction, the diameter reducing direction, and the like. Therefore, for example, when mounting the gasket on the equipment, even if the insertion holes 4a, 4b and 4c and the holes provided on the equipment side are not perfectly aligned, the gasket is deformed to align them, It is possible to insert a positioning member into the insertion holes 4a, 4b and 4c and the hole on the device side to fix the gasket at a predetermined position of the device. Therefore, workability at the time of mounting the gasket on the equipment is improved, and the necessity for manufacturing the gasket with high dimensional accuracy is reduced.

  In the illustrated embodiment, the reinforcing ring 2 is provided with three cut portions 2a, 2b and 2c, and the reinforcing ring 2 is separated into three reinforcing ring portions 2A, 2B and 2C. The number of the cut-out portions is not necessarily three, but in order to make the reinforcing ring 2 sufficiently deformable, a configuration in which a plurality of cut-out portions are provided and the reinforcing ring 2 is separated into a plurality of reinforcing ring portions. It is preferable to make it. In particular, when a large gasket is manufactured, a large reinforcing ring is manufactured from a large plate-shaped material by pressing, which increases material loss, but the reinforcing ring 2 is separated into a plurality of reinforcing ring portions. If it is made, it becomes possible to manufacture each reinforcing ring part by press working with less material loss. Moreover, each reinforcement ring part is easier to transport than a large reinforcement ring.

  The number of excised parts is determined in consideration of the degree of deformability to be applied to the reinforcing ring, and the number of excised parts can be made one depending on the material and dimensions of the reinforcing ring. It is.

It is a top view of the gasket of an example of the present invention. It is the expanded sectional view which looked at FIG. 1 in the arrow AA direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gasket 2 Reinforcement ring 2a, 2b, 2c Cut part 2A, 2B, 2C Reinforcement ring part 3 Sealing body 3a, 3b, 3c Protrusion part 4a, 4b, 4c Positioning member insertion hole

Claims (4)

  A gasket having a reinforcing ring formed of a rigid material, and a seal body made of a rubber-like elastic body fixed to the reinforcing ring and extending annularly in the circumferential direction of the reinforcing ring and compressed and sandwiched between two opposing surfaces of the device The gasket according to claim 1, wherein a cut-out portion is provided in at least one location of the reinforcing ring so that the reinforcing ring is discontinuous in the circumferential direction.   2. The gasket according to claim 1, wherein the cut portions are provided at a plurality of locations of the reinforcing ring, and the reinforcing rings are constituted by a plurality of reinforcing ring portions separated from each other in the circumferential direction by the cut portions.   The gasket according to claim 1 or 2, wherein an insertion hole of a positioning member for positioning the gasket between the two surfaces is formed in the reinforcing ring. The gasket according to any one of claims 1 to 3, wherein the seal body has a protrusion made of a rubber-like elastic body that enters the cut portion and fills the cut portion.