JPH061923U - Seal stopper - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a sealing plug capable of reliably preventing liquid leakage from a cylinder hydraulic chamber or the like and entry of foreign matter into the hydraulic chamber. A sealing plug used as a plug of a hole, the sealing plug being inserted into the hole, and being elastically deformed and pressed against an inner wall of the hole with the main body inserted in the hole. A protrusion formed on the outer periphery of the body of the main body, a flange portion formed on the end portion of the main body, and a lip formed on the outer peripheral portion of the flange portion and elastically deformed and pressed against the outer peripheral surface of the end portion of the hole. It is composed of

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sealing plug used as a plug for an oil filling hole of a hydraulic actuation mechanism.

[0002]

[Prior art]

 Conventionally, as shown in FIGS. 6 to 9, a sealing plug of an oiling hole for a cylinder of a hydraulic operating mechanism such as a master cylinder or a brake cylinder has been used. A conventional example will be briefly described below with reference to the drawings. FIG. 6 is a plan view and a sectional view of a sealing plug used to close an oiling hole of a brake cylinder or the like, and the sealing plug 10 is made of elastic material such as rubber. It is formed as a material. The sealing plug 10 is constructed so as to have a certain tightening margin with respect to the inner diameter 12 of the hole to be fitted, and has a flange portion 11 formed therein, which is fitted into the hole as shown in FIG. Therefore, the flange portion 11 can perform a sealing function.

In addition, as shown in FIG. 8, a hexagonal bolt 15 made of plastic or the like is screwed to the pipe thread portion 14 of the brake cylinder 13 and used as a sealing plug. In this structure, the hexagonal portion 15 is used for tightening, and the seat surface formed by the lower surface of the hexagonal portion 16 and the upper surface of the pipe screw portion 14 and the screw portion prevent the fluid in the cylinder from flowing out. Can be prevented. Further, the sealing plug shown in FIG. 9 is an improved product of the one shown in FIGS. 6 to 8 and is fitted into the body portion 18 having a substantially U-shaped cross section and a substantially U-shaped concave portion on the outer peripheral surface. It is constructed by integrally forming a core 19 that pushes the body portion outwardly through a connecting portion, thereby improving the sealing performance of the sealing plug, and preventing liquid leakage from the cylinder hydraulic chamber. It is said that foreign matter can be effectively prevented from entering the hydraulic chamber.

[0004]

[Problems to be solved by the device]

 However, any of the above sealing plugs has the following drawbacks, and is still insufficient as a practical product. That is, the seals shown in FIGS. 6 and 7 perform sealing only by using the elastic force due to the contraction of the shaft of the sealing plug. Therefore, the sealing performance is not sufficient, and after the performance test of the brake cylinder, etc. When a plug is used, the oil liquid remaining in the cylinder often oozes from this sealing plug fitting part, and as a result, the brake pad is contaminated and the function as a sealing plug is insufficient. In addition, although the seal shown in FIG. 8 maintains the sealability, the workability in attaching and detaching the sealing plug is poor. Further, in the structure shown in FIG. 9, since it is necessary to fit the sealing plug into the hole and further insert the core into the recess of the sealing plug, the mounting work is troublesome. Further, there is a problem that the sealing plug may come off if something is caught in the connecting portion.

In view of this, the present invention forms a sealing projection at an appropriate position on the outer circumference of the main body of the sealing plug, forms a lip on the outer circumference of the flange portion of the sealing plug, and when the sealing plug is fitted in the hole, The protrusion and the lip are intended to ensure the improvement of the sealing property, and thereby solve the above problems.

[0006]

[Means for Solving the Problems]

 Therefore, the present invention provides a sealing plug used as a hole plug, wherein the sealing plug is elastically deformed and pressed against the inner wall of the hole while the body is inserted into the hole. The protrusion formed on the outer periphery of the body of the main body, the flange portion formed on the end portion of the main body, and the elastic deformation on the outer peripheral surface of the end portion of the hole formed on the outer peripheral portion of the flange portion. It is composed of a lip portion that is pressed by the lever, and this is used as a means for solving the problem.

[0007]

[Action]

 The sealing plug 1 is used by being fitted and assembled in a hole of a cylinder or the like. At this time, the protrusion 4 formed on the outer circumference of the body of the main body 2 of the sealing plug comes into contact with the inner surface of the hole formed in the cylinder to be deformed, and the lip portion 6 formed on the outer peripheral end of the flange is elastically deformed. As a result, a sufficient sealing property can be secured.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a top view, a sectional view and a bottom view of a sealing plug according to a first embodiment of the present invention, and FIG. 2 is an external view of the sealing plug of FIG. FIG. 3 is a sectional view of the attachment thereof. In FIG. 1, reference numeral 1 denotes a sealing plug, and this sealing plug 1 has a bottom portion 3 and a main body 2 having a shape (cylindrical shape in this embodiment) suitable for a fitting hole. The main body 2 includes a protrusion 4 formed on the outer periphery of the body portion, a flange portion 5 formed on the upper end of the main body 2, and a lip portion 6 formed on the outer peripheral tip of the flange portion. In this embodiment, the protrusion 4 formed on the entire outer periphery of the body portion is illustrated as having only one step, but a plurality of annular steps may be formed if necessary. Further, the number of the lip portions 6 formed at the tip of the outer periphery of the flange is not limited to one, and a plurality of concentric circles may be formed.

The sealing plug is made of an elastic material such as rubber, and the sealing force is ensured by the elastic force of the sealing plug. That is, the sealing plug 1 has an external shape as shown in FIG. 2, and is used by being fitted and assembled in the hole of the brake cylinder as shown in FIG. At this time, the projection 4 comes into contact with the inner surface of the hole formed in the cylinder to be elastically deformed, and the lip portion 6 is also elastically deformed as shown in the drawing, whereby sufficient sealing performance can be secured.

Next, a sealing plug according to a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3 is a top view, a sectional view, a bottom view and an external view of the sealing plug. FIG. 4 is a sectional view of the sealing plug of FIG. Similar to the first embodiment, the sealing plug 21 is also formed with a cylindrical main body 22 having a bottom portion 23, a protrusion 24 formed on the outer periphery of the body of the main body 22, and an upper end of the main body 22. The flange portion 25 and a lip portion 26 formed at the outer peripheral tip of the flange portion 25. In this embodiment, a knob 27, which is convenient for removing the sealing plug, is formed so as to rise from the bottom 23, and the bottom 23 is also formed thinner than the wall thickness of the upper cylinder in order to increase the elasticity of the protrusion 24. In addition, the projection formed on the outer circumference of the cylindrical portion is divided, and in addition to the projection 4 formed on the outer circumference of the body, an annular projection 4'which is sealingly engaged with the hole is formed. This is different from the first embodiment. Further, although only one lip 6 is illustrated in the embodiment, the number of the lip 6 formed at the outer peripheral tip of the flange is not limited to one, and a plurality of concentric circles may be formed.

Similar to the first embodiment, this sealing plug is also made of elastic material such as rubber, and the sealing force is ensured by the elastic force of the sealing plug. Then, as shown in FIG. 4 and FIG. 5, it is fitted and assembled in a hole of a brake cylinder or the like. At this time, the protrusion 24 comes into contact with the inner surface of the hole formed in the cylinder and is deformed, and the protrusion 4'and the lip portion 26 are elastically deformed as shown in the figure, thereby ensuring a sufficient sealing property. You can Further, when removing the sealing plug, it is possible to easily remove the sealing plug from the hole simply by holding the knob portion 27 and pulling out from the hole.

As described above, according to the present invention, the protrusion for sealing is formed at an appropriate position on the outer circumference of the main body of the sealing plug, and the lip is formed on the outer circumference of the flange portion of the sealing plug to fit the sealing plug into the hole. When they are combined, the protrusion and the lip are intended to ensure the improvement of the sealing property, so that it is possible to surely solve the problems such as the liquid leak of the conventional sealing plug. The projections 4 and 24 and the lip portions 6 and 26 in each of the above embodiments are not limited to the shapes shown in the figures, and may be of any type as long as they have the same function. Of course, it may be configured by combining the one with the all-around type or by providing a plurality of stages with the dividing positions of the divided type shifted. Further, the main body does not necessarily have to have a hollow shape, and if the material used has elasticity, a solid one can also perform the same function.

[0013]

[Effect of device]

 As described in detail above, according to the present invention, since the protrusion is formed on the outer periphery of the sealing plug and the lip portion is formed on the outer periphery of the flange portion, the sealing performance of the sealing plug is further improved and the cylinder hydraulic chamber This has an excellent effect that it is possible to reliably prevent liquid leakage and foreign matter from entering the hydraulic chamber.

[Brief description of drawings]

FIG. 1 is a top view of a sealing plug according to an embodiment of the present invention,
It is a sectional view and a bottom view.

FIG. 2 is an external view of the sealing plug of FIG. 1 and an assembled sectional view thereof.

FIG. 3 is a top view, a cross-sectional view, a bottom view and an external view of a sealing plug according to another embodiment of the present invention.

FIG. 4 is a sectional view and an enlarged view of an essential part of the sealing plug of FIG.

FIG. 5 is an explanatory view in which the sealing plug according to the present invention is used for a hole of a disc brake.

FIG. 6 is a top view and a sectional view of a conventional sealing plug.

FIG. 7 is a mounting view of a conventional sealing plug.

FIG. 8 is a mounting view of another conventional sealing plug.

FIG. 9 is a side view of another conventional sealing plug and its mounting view.

[Explanation of symbols]

 1, 21 Sealing plug holder 2, 22 Sealing plug main body 3, 23 Main body bottom part 4, 24 Protrusion 5, 25 Flange 6, 26 Lip part 27 Knob part

Claims (3)

[Scope of utility model registration request] 1. A sealing stopper used as a stopper for a hole, comprising:
The sealing plug includes a main body inserted into the hole, a protrusion formed on an outer periphery of a body of the main body which is elastically deformed and pressed against an inner wall of the hole when the main body is inserted into the hole, and A sealing plug comprising: a flange portion formed at an end portion; and a lip portion formed at an outer peripheral portion of the flange portion and elastically deformed and pressed by an outer peripheral surface of an end portion of the hole. 2. The sealing plug according to claim 1, wherein the protrusion formed on the outer periphery of the body of the main body has a plurality of steps. 3. The sealing plug according to claim 1, wherein the protrusion formed on the outer circumference of the body of the main body is divided into a plurality of pieces in the circumferential direction.