JPH08364U - O-ring removal prevention structure - Google Patents

Abstract

(57) [Summary] [Structure] A frame-shaped insertion groove 3 having a rectangular cross section for inserting the O-ring 5 is provided on one of the two planes to be joined, and the opening of the insertion groove 3 is formed. A plurality of retaining pins 4 are fixed by welding along the inner sides of the portion 31 at appropriate intervals. [Effect] Since the cross section of the insertion groove can be formed in a rectangular shape, it can be processed without the need for a specially shaped tool, such as when processing a square frame-shaped insertion groove on the joining plane, and it can be used as an O-ring even at high temperatures. It is possible to create a sealed state without applying excessive restraint force.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sealing structure of two flat joint surfaces using an O-ring.

[0002]

[Prior art]

 Conventionally, in order to prevent the O-ring from coming out from the insertion groove that inserts the O-ring provided on one surface of the joint surface, the cross-sectional shape of the insertion groove has a width at the bottom of the groove that is smaller than that of the opening. A wide, so-called dovetail groove is formed, or a recess is provided on the side surface of the insertion groove to insert a retaining pin therein (for example, Japanese Utility Model Publication No. 37-13913).

[0003]

[Problems to be solved by the device]

 However, if the insertion groove of the O-ring is circular, there is not much problem, but if the insertion groove is formed in a square frame shape on one of the two sliding planes, processing of the dovetail groove or the groove is performed. There is a drawback that a tool with a special shape is required to process the concave part on the side surface of the mold, and it is difficult to finish the bottom surface that becomes the sealing surface due to the narrow opening, and it takes a lot of time. In addition, as disclosed in Japanese Utility Model Publication No. 37-13913, when the temperature becomes high, the O-ring expands and the extension along the insertion groove is restricted, and the expansion occurs in the width direction of the groove, resulting in leakage and perfect sealing. Couldn't keep An object of the present invention is to provide an O-ring that does not require a specially shaped tool for machining the insertion groove and has a stopper for easy finishing of the seal surface.

[0004]

[Means for Solving the Problems]

 The present invention relates to an O-ring drop-out prevention structure of a sealing structure having an insertion groove for inserting an O-ring in one of two planes to be joined, the opening of the insertion groove having a rectangular cross section. Along the inside, a plurality of retaining pins are fixed at appropriate intervals. Further, the retaining pin is composed of a round bar fixed by welding.

[0005]

[Action]

 Since the cross section of the insertion groove is a simple rectangular shape, it is possible to process the insertion groove without the need for a special tool. Also, the O-ring inserted in the insertion groove is only prevented from protruding from the opening by the retaining pin, and there is no restraint in the direction along the insertion groove. It is not binding.

[0006]

【Example】

 The present invention will be described with reference to the embodiments shown in the drawings. FIG. 1 is a side sectional view showing an embodiment of the present invention, in which a rectangular protrusion 22 provided on a flat bottom surface 21 of a device 2 is inserted into an opening portion 12 provided on a flat portion 11 of a container 1. The bottom surface 21 around the protrusion 22 is provided with a rectangular frame-shaped insertion groove 3 having a rectangular cross section. As shown in FIG. 2, a plurality of round rod-shaped retaining pins 4 are joined to the opening 31 of the insertion groove 3 along the inner sides of the opening 31 by welding at appropriate intervals. The O-ring 5 is inserted while being deformed by being pushed into the insertion groove 3 while pressing it into the opening width A fitted by the retaining pin 4, and is held in the insertion groove 3. Therefore, when machining the insertion groove 3, a tool with a special shape is not required, and a tool for machining a normal rectangular groove is used, and then the retaining pin 4 is inserted so that it does not project to the surface of the bottom surface 21. It may be welded to the opening 31 of the groove 3. Further, the O-ring 5 inserted in the insertion groove 3 is merely prevented from protruding from the opening 32 by the retaining pin 4, and there is no restraint in the direction along the insertion groove. Therefore, even if the container or equipment becomes hot and the O-ring expands, it can freely extend along the insertion groove, so that the O-ring is not subjected to an unreasonable restraint force, and a perfect seal is provided. You can

[0007]

[Effect of device]

 As described above, according to the present invention, since the insertion groove has a simple rectangular cross section, it is possible to process the insertion groove without using a specially shaped tool, and the processing time can be reduced. As it becomes shorter, regular replacement of the O-ring can be easily performed. Further, since the processing tool can be selected relatively freely, the processing accuracy can be improved. Furthermore, since the O-ring is not unduly constrained even at a high temperature, there is an effect that a perfect sealed state can be created.

[Brief description of drawings]

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

FIG. 2 is a plan sectional view taken along the section shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 11 Plane part 12 Opening part 2 Equipment 21 Bottom surface 22 Projection part 3 Insertion groove 31 Opening part 4 Retaining pin 5 O-ring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Fukuda 12-1 Otemachi, Ogurakita-ku, Kitakyushu-shi, Fukuoka Yasukawa Electric Co., Ltd. Kokura factory

Claims (2)

[Scope of utility model registration request] 1. An O-ring drop-out prevention structure having a hermetically sealed structure having an insertion groove for inserting an O-ring in one of two flat surfaces to be joined, the opening of the insertion groove having a rectangular cross section. An O-ring dropout prevention structure characterized in that a plurality of retaining pins are fixed at appropriate intervals along both inner sides. 2. The O-ring falling prevention structure according to claim 1, wherein the retaining pin is formed of a round bar fixed by welding.