JPH0985641A - O-ring removing jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an O-ring removing jig which can easily and safely remove an O-ring fitted in a groove formed on the outer periphery of a cylindrical part. SOLUTION: An O-ring removing jig is composed of casing members 5, 6 which are mutually connected at one end of each other and extendedly provided so as to gradually open as approaching the other end side, and a sandwichedly holding body 4 composed of abutting members 7, 8 which are attached to the casing members 5, 6 and mutually opposite. When the outer periphery of a cylindrical part 1 is put and pressed between the protrusive parts 7a, 8a of the abutting parts 7, 8, the O-ring 3 is elastically deformed to extend radially, and it is therefore partially forced out of the groove 2 to form a gap G between the cylindrical part 1 and its outer periphery, and then an inserting tool is inserted into the gap G to draw out the O-ring 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an O-ring removing jig used for removing an O-ring mounted in a groove of a cylindrical portion such as a choke provided in a hydraulic control device for a hydraulic elevator.

[0002]

2. Description of the Related Art Conventionally, in order to remove an O-ring mounted in a groove of a cylindrical portion such as a choke provided in a hydraulic control device for a hydraulic elevator, an operator presses the outer peripheral surface of the O-ring with a fingertip or the like to remove the O-ring. A part of the O-ring is protruded from the groove to form a gap between the O-ring and the outer peripheral surface of the cylindrical portion, and an insert such as a bamboo spatula is inserted into the gap, and the O-ring is entirely covered by the insert. It was supposed to be pulled out from the groove.

[0003]

By the way, in the above-mentioned prior art, since the operator's fingertip is slippery due to the hydraulic oil adhering to the cylindrical portion such as the choke, and the O-ring is mounted in the narrow groove, There is a problem that it is difficult for a worker to press the outer peripheral surface of the O-ring with a fingertip, so that it takes a considerable time to remove the O-ring.

Further, when the O-ring is small (for example, having a diameter of 5 mm or less), when the operator strongly presses the O-ring in the groove of the cylindrical portion with the fingertip, the fingertip may be damaged by the edge of the groove. was there.

The present invention has been made in view of the actual situation in the prior art as described above, and an object thereof is to easily and safely remove an O-ring mounted in a groove formed on an outer peripheral surface of a cylindrical portion. It is to provide an O-ring removing jig that can be used.

[0006]

In order to achieve the above object, the present invention provides an O mounted in a groove formed on the outer peripheral surface of a cylindrical portion.
In an O-ring removing jig for removing the ring, the jig is formed in a V shape and includes a holding body that holds the outer peripheral surface of the O-ring. The holding body holds the outer peripheral surface of the O-ring to press the O-ring. The O-ring is extended in the radial direction to form a gap between the O-ring and the outer peripheral surface of the cylindrical portion.

[0007]

Since the present invention is configured as described above, the O-ring is elastically deformed by pressing the outer peripheral surface of the O-ring mounted in the groove formed on the outer peripheral surface of the cylindrical portion with the holding member, and the O-ring is radially deformed. As a result, the O-ring partly protrudes from the groove on the outer peripheral surface of the cylindrical portion to form a gap with the outer peripheral surface of the cylindrical portion. Then, after inserting an insertion tool such as a bamboo spatula into this gap, the O-ring is pulled out from the groove over the entire circumference with this insertion tool. As a result, the O-ring mounted in the groove can be removed easily and safely as compared with the case where the operator presses the O-ring with his fingertip to remove it.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an O-ring removing jig of the present invention will be described below with reference to the drawings. 1 is a perspective view showing an embodiment of an O-ring removing jig of the present invention, and FIG. 2 is a perspective view showing a pair of jacket members provided in the O-ring removing jig of FIG.
FIG. 3 is a perspective view showing an abutting member provided in the O-ring removing jig of FIG. 1, and FIG. 4 is a view for explaining a work procedure when the O-ring is removed by the O-ring removing jig of FIG.

A groove 2 is formed along the circumferential direction on the outer peripheral surface of a cylindrical portion 1 such as a choke shown in FIG. 1, and an O-ring 3 is mounted in the groove 2.

The O-ring removing jig of this embodiment, as shown in FIG. 1, is formed in a V shape and comprises a holding body 4 for holding the outer peripheral surface of the cylindrical portion 1, and the holding body 4 is provided. Is a pair of outer cover members 5, 6 which are connected to each other and extend so as to gradually open toward the other end.
And attached to the pair of jacket members 5 and 6, respectively,
It is composed of a pair of contact members 7 and 8 facing each other.

The pair of jacket members 5, 6 described above are each made of a stainless steel material, have a U-shaped cross section as shown in FIG. 2, and the openings 5a, 6a are opposed to each other. The ends are welded together.

As shown in FIG. 1, one of the abutting members 7 described above is inserted into the opening 5a of the jacket member 5, and a part of the abutting member 7 faces the other jacket member 6 from the opening 5a. The abutting member 7 has one end 7b protruding from the end of the outer cover member 5, and as shown in FIG.
A protrusion 7a having a width dimension W equivalent to the thickness dimension of the ring 3.
It has. Similarly, the other contact member 8 is also made of wood that is inserted into the opening 6a of the outer covering member 6 and partly projects from the opening 6a toward the other outer covering member 5, and It has a protrusion 8a having a width W of one end, and one end 8b protrudes from the end of the jacket member 6.

In this embodiment, the O-ring 3 is removed from the groove 2 on the outer peripheral surface of the cylindrical portion 1 according to the work procedure described in FIG. That is, first, as shown in FIG. 4A, the cylindrical portion 1 is interposed between the contact members 7 and 8 of the holding body 4, and the cylindrical portion 1 is moved in the direction of the arrow shown in FIG. 4B, the outer peripheral surface of the O-ring 3 is sandwiched between the protrusions 7a and 8a of the contact members 7 and 8 as shown in FIG. 4B. When pressed, the O-ring 3 expands in the radial direction due to elastic deformation, and a part of the O-ring 3 protrudes from the groove 2. As a result, a gap G is formed between the O-ring 3 and the outer peripheral surface of the cylindrical portion 1. It is formed. Next, as shown in (c) of FIG. 4, an insertion tool 9 such as a spatula is inserted into the gap G, and in this state, the cylindrical portion 1 is separated from the holding body 4, and as shown in (d) of FIG. After pulling out the O-ring 3 from the groove 2 over the entire circumference with the insertion tool 9, the O-ring 3 is moved to the outside of the end of the cylindrical portion 1 to complete the removal work of the O-ring 3.

In the embodiment thus constructed, each of the protrusions 7a, 8a of the abutting members 7, 8 has a width dimension W equivalent to the thickness dimension of the O-ring 3, so that the inside of the groove 2 of the cylindrical portion 1 is Since the O-ring 3 attached to the can be reliably pressed by the projections 7a and 8a, and even when the hydraulic oil adheres to the cylindrical portion 1, the pressing work does not have any hindrance. The work for removing the O-ring 3 is quick. Further, even when the O-ring 3 is small, the O-ring 3 in the groove 2 of the cylindrical portion 1
Since it is not necessary for the operator to press the fingertip with the fingertip, it is possible to prevent an accident in which the fingertip is scratched by the edge of the groove 2.

Further, the holding body 4 has a pair of outer jacket members 5 and 6 having one ends welded to each other, and a pair inserted into the openings 5a and 6a of the pair of outer jacket members 5 and 6, respectively. This structure is relatively simple because it is composed of the contact members 7 and 8.

[0016]

Since the present invention is constructed as described above, the O-ring mounted in the groove formed on the outer peripheral surface of the cylindrical portion can be easily and safely removed, and therefore the work efficiency of O-ring removal can be improved. There is an effect that can improve.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an O-ring removing jig of the present invention.

2 is a perspective view showing a pair of jacket members provided in the O-ring removing jig of FIG. 1. FIG.

3 is a perspective view showing an abutting member provided in the O-ring removing jig of FIG. 1. FIG.

FIG. 4 is a diagram illustrating a work procedure when the O-ring is removed by the O-ring removing jig of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical part 2 Groove 3 O-ring 4 Clamping body (O-ring removing jig) 5, 6 Envelope member 5a, 6a Opening part 7, 8 Abutting member 7a, 8a Projecting part

Claims (4)

[Claims] 1. An O-ring removing jig for removing an O-ring mounted in a groove formed on an outer peripheral surface of a cylindrical portion, the O-ring removing jig having a V-shaped holding member for holding the outer peripheral surface of the O-ring, The O-ring is expanded in the radial direction by pressing the outer peripheral surface of the O-ring with the holding body, and a gap is formed between the O-ring and the outer peripheral surface of the cylindrical portion. O-ring removing jig. 2. The sandwiching body has a pair of outer cover members, which are connected to each other at one end and extend so as to gradually open toward the other end side, and which are attached to the pair of outer cover members and face each other. The O-ring removing jig according to claim 1, further comprising a pair of abutting members, wherein the pair of abutting members are respectively brought into contact with the outer peripheral surface of the O-ring. 3. The pair of abutting members each have a width dimension equivalent to the thickness dimension of the O-ring, and each of the pair of abutting members includes a protrusion that presses the outer peripheral portion of the O-ring. The O-ring removing jig according to claim 1 or claim 2. 4. The pair of outer cover members are made of stainless steel material having their respective ends welded to each other and having openings facing each other, and the pair of abutting members are respectively inserted into the openings of the outer cover members. 3. The wood according to claim 2, wherein each side portion is made of wood protruding from the opening.
The described O-ring removal jig.