JP2018040431A - Jig for press-fitting and mounting seal material - Google Patents

Abstract

An object of the present invention is to provide a sealing material press-fitting mounting jig having a configuration capable of easily press-fitting and mounting a sealing material in an appropriate position when the sealing material is press-fitted to an annular groove provided on an inner peripheral wall of a rod head. It is to provide. A sealing material press-fitting mounting jig 1 includes a plate-like portion 11 that comes into contact with a rigid portion 21 of the sealing material 20 from one side in the axial direction, and an inner side of the annular sealing material 20 from the plate-like portion 11. When the sealing material 20 is press-fitted and fitted into the annular groove 42g using the sealing material press-fitting fitting jig 1 including the cylindrical portion 12 that extends so as to pass and has an outer diameter substantially the same as the inner diameter of the inner peripheral wall 42. Is a state in which the sealing material press-fitting mounting jig 1 is pushed in while the plate-like portion 11 is in contact with the rigid portion 21 of the sealing material 20 and the cylindrical portion 12 is passing through the inside of the elastic member 22. It becomes. [Selection] Figure 3

Description

  The present invention relates to a structure of a sealing material press fitting jig.

  In a rod head having a cylindrical inner peripheral wall on which a rod slides, a dust seal material or other sealing material is press-fitted into an annular groove recessed in the radial direction provided on the inner peripheral wall. In the sliding surface, the outside and the inside are separated from each other to prevent dust from entering the outside or leakage of sliding oil from the inside to the outside. Such a dust seal material is disclosed in, for example, Japanese Unexamined Patent Application Publication No. 2006-045068 (Patent Document 1) and Japanese Unexamined Patent Application Publication No. 2009-257376 (Patent Document 1).

JP, 2006-045068, A JP 2009-257376 A

  When such a dust seal material is press-fitted into an annular groove provided on the inner peripheral wall of the rod head, the annular groove is normally open to the outside on one side in the axial direction of the rod head. It was gradually press-fitted while hitting with a hammer.

  However, it is a relatively skillful operation to press-fit the annular seal into the annular groove while maintaining the dust seal material in an appropriate posture (parallel to a plane orthogonal to the axial direction). In addition, in order to maintain the posture of the dust seal material and apply a pressure input evenly, a metal disk-shaped member is brought into contact with the dust seal material, and the disk-shaped member is hit with a hammer or the like. However, the metal disk-like member is heavy and needs to be handled with care. This metal disk-shaped member was used, and it was not possible to ensure that the dust seal material maintained an appropriate posture.

  An object of the present invention is to solve the above-described problem, and when a sealing material is press-fit into an annular groove provided on the inner peripheral wall of the rod head, it can be easily press-fitted to an appropriate position. An object of the present invention is to provide a sealing material press fitting jig having such a structure.

  This sealing material press-fit mounting jig is a resin sealing material press-fit mounting jig used when press-fitting an annular sealing material onto a rod head having a cylindrical inner peripheral wall extending in the axial direction. The sealing material is press-fitted into an annular groove provided in the inner peripheral wall and recessed outward in the radial direction, and the annular groove is open to the outside on one side in the axial direction. Includes an annular rigid portion on the outer side in the radial direction and an annular elastic member on the inner side of the rigid portion.

  The sealing material press-fitting mounting jig passes from the one side in the axial direction to a plate-like portion that comes into contact with the rigid portion of the sealing material, and from the plate-like portion to the inside of the annular sealing material. And a cylindrical portion having an outer diameter substantially the same as the inner diameter of the inner peripheral wall.

  When the sealing material is press-fitted and installed in the annular groove using the sealing material press-fitting jig, the disk-shaped portion is in contact with the rigid portion of the sealing material, and the cylindrical portion is the elastic member. In a state of passing through the inside of the member, the sealing material press fitting jig is pushed.

  In another embodiment, the cylindrical portion has a hollow portion extending from the end opposite to the disc-like portion toward the disc-like portion.

  In another form, the elastic member of the sealing material has an extending region that protrudes from the rigid portion in the axial direction, and the axial direction is provided on the side of the plate-like portion where the cylindrical portion is provided. A relief recess is provided for receiving the extension region when the disc-shaped portion abuts on the rigid portion.

  In another embodiment, an attachment portion for attaching a slide hammer is provided on the surface of the disc-like portion opposite to the side where the cylindrical portion is provided.

  According to this sealing material press fitting jig, when the sealing material is press fitted to the annular groove provided on the inner peripheral wall of the rod head, it can be easily press fitted and mounted at an appropriate position. It is possible to provide a jig for fitting and fitting a seal material.

FIG. 3 is a diagram showing an external configuration of a sealing material press fitting jig in the first embodiment. FIG. 3 is a schematic cross-sectional view before press-fitting a sealing material using the sealing material press-fitting mounting jig in the first embodiment. FIG. 3 is a schematic cross-sectional view showing a press-fitted state of a sealing material using the sealing material press-fitting mounting jig in the first embodiment. FIG. 4 is an enlarged perspective cross-sectional view before press-fitting a sealing material using the sealing material press-fitting mounting jig in the first embodiment. FIG. 3 is an enlarged perspective cross-sectional view showing a press-fit state of a seal material using the seal material press-fitting mounting jig in the first embodiment. FIG. 10 is a diagram showing an external configuration of a sealing material press fitting jig according to a second embodiment. 10 is an overall perspective view showing a press-fitted state of a sealing material using a sealing material press-fitting attachment jig in Embodiment 2. FIG.

  A sealing material press fitting jig in each embodiment based on the present invention will be described below with reference to the drawings. In each embodiment described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. The same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated.

(Embodiment 1: Jig 1 for sealing material press fitting)
With reference to FIG. 1 and FIG. 2, the structure of the sealing material press fitting jig 1 in the present embodiment will be described. FIG. 1 is a diagram showing an external configuration of a sealing material press-fitting / mounting jig 1, and FIG. 2 is a schematic cross-sectional view before the sealing material 20 is press-fitted using the sealing material press-fitting / mounting jig 1.

  As shown in FIG. 1, a sealing material press-fitting mounting jig 1 according to the present embodiment has a plate-like portion 11 and a lower portion in the drawing along a direction in which an axis AL passing through the center of the plate-like portion 11 extends. The cylindrical part 12 extended in the side is included. The seal material press fitting jig 1 is a resin molded product. A more detailed configuration will be described below with reference to FIG.

  This sealing material press fitting jig 1 is used when the annular sealing material 20 is press fitted to a rod head 40 having a cylindrical inner peripheral wall 42 extending in the axis AL direction. The inner peripheral wall 42 is provided with an annular groove 42g that is recessed outward in the radial direction. The annular groove 42g is open to the outside on one side (the upper side in the drawing) in the axis AL direction. The sealing material 20 is press-fit into the annular groove 42g.

  The sealing material 20 includes an annular rigid portion 21 on the outer side in the radial direction and an annular elastic member 22 on the inner side of the rigid portion 21. The rigid portion 21 is made of a metal material such as aluminum or steel, and the elastic member 22 is made of natural rubber, synthetic rubber, resin rubber, or the like.

  The elastic member 22 of the sealing material 20 is provided with a lip portion 22b as an extended region protruding from the rigid portion 21 in the axis AL direction.

  The sealing material press-fitting mounting jig 1 passes through a disc-like portion 11 that comes into contact with the rigid portion 21 of the sealing material 20 from one side in the axial direction, and passes through the inside of the annular sealing material 20 from the disc-like portion 11. A cylindrical portion 12 that extends and has an outer diameter substantially the same as the inner diameter of the inner peripheral wall 42.

  The cylindrical part 12 has a hollow part 15 extending from the end opposite to the disk-shaped part 11 toward the disk-shaped part 11. The hollow portion 15 has a cylindrical shape with one end side opened.

  On the side of the plate-like portion 11 where the cylindrical portion 12 is provided, there is provided a relief recess 14 that is recessed along the axial direction and that receives the lip portion 22b when the plate-like portion 11 contacts the rigid portion 21. In the present embodiment, the escape recess 14 is provided so as to surround the root region of the cylindrical portion 12.

(Press fit into the annular groove 42g of the sealing material 20)
With reference to FIGS. 3 to 5, the case where the sealing material 20 is press-fitted and mounted in the annular groove 42 g by hitting the sealing material press-fitting mounting jig 1 using the hammer 100 will be described. FIG. 4 is a schematic cross-sectional view showing a press-fitted state of the sealing material 20 using the material press-fitting mounting jig 1, FIG. 4 is an enlarged perspective cross-sectional view before press-fitting the sealing material 20 using the sealing material press-fitting mounting jig 1, FIG. 5 is an enlarged perspective sectional view showing a press-fitted state of the sealing material 20 using the sealing material press-fitting mounting jig 1.

  When the sealing material 20 is press-fitted and attached to the annular groove 42g using the sealing material press-fitting mounting jig 1, the hammer 100 is used to strike the plate-like portion 11 of the sealing material press-fitting mounting jig 1. At this time, as shown in FIG. 4, since the outer surface of the cylindrical portion 12 moves along the inner peripheral wall 42, the sealing material press-fitting mounting jig 1 is driven straight along the axis AL. . As a result, the sealing material 20 is also press-fitted straight into the annular groove 42g.

  As shown in FIGS. 4 and 5, the sealing material 20 of the present embodiment has a lip portion 22 b, but the inner surface 13 of the plate-like portion 11 is provided with a relief recess 14 that receives the lip portion 22 b. Therefore, the lip 22b is not crushed by the sealing material press fitting jig 1.

  As described above, in the press-fitting mounting of the sealing material 20 into the annular groove 42g using the sealing material press-fitting mounting jig in the present embodiment, the sealing material 20 is inserted into the annular groove provided on the inner peripheral wall 42 of the rod head 40. When press-fitting to 42g, it has a configuration that can be easily press-fitted to an appropriate position.

  After press-fitting and mounting the sealing material 20 on the inner peripheral wall 42, the sealing material press-fitting mounting jig 1 is removed from the rod head 40 by tapping the back surface side of the disk-shaped portion 11 from the hollow portion 15 using a rod-shaped member or the like. be able to. By providing the hollow portion 15 in the cylindrical portion 12 of the sealing material press-fitting mounting jig 1, the position where the back surface side of the disk-shaped portion 11 is hit is fixed, and the sealing material press-fitting mounting jig 1 can be easily attached to the rod. It can be removed from the head 40.

(Embodiment 2: Sealing material press fitting jig 1A)
With reference to FIG. 6 and FIG. 7, the structure of the sealing material press fitting jig 1A in the present embodiment will be described. FIG. 6 is a view showing an external configuration of the sealing material press-fitting / mounting jig 1A, and FIG. 7 is an overall perspective view showing a press-fitting state of the sealing material using the sealing material press-fitting / mounting jig.

  The basic configuration of the seal material press-fitting / mounting jig 1A in the present embodiment is the same as that of the seal material press-fitting / mounting jig 1 in the first embodiment. As shown in FIG. 6, the difference is that a female screw 1 h as an attachment portion for attaching the slide hammer is provided at the center position of the plate-like portion 11. As a result, as shown in FIG. 7, the shaft portion 201 of the slide hammer 200 can be screwed into the female screw 1 h of the plate-like portion 11.

  In this way, by connecting the slide hammer 200 to the disk-shaped part 11, the hammer part 202 can be moved along the shaft part 201 located at the center of the disk-shaped part 11, and the disk-shaped part 11 can be hit. . By using the slide hammer 200, it is possible to always hit the center position of the plate-like portion 11, so that the sealing material press-fitting / mounting jig 1A can be advanced efficiently and the sealing material 20 can be press-fitted and mounted. Other operational effects are the same as those of the sealing material press-fitting mounting jig 1 in the first embodiment.

  In each of the above embodiments, since the sealing material 20 is provided with the lip portion 22b, the configuration in which the relief recess 14 is provided in the disk-like portion 11 is adopted. However, the sealing material 20 has the lip portion 22b. If it is not provided, it is not necessary to provide the relief recess 14 in the plate-like part 11.

  In each of the above-described embodiments, the case where the hollow portion 15 is provided in the cylindrical portion 12 has been described, but it is not always necessary to provide it.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1,1A Sealing material press fitting jig, 1h female screw, 11 disk-shaped portion, 12 cylindrical portion, 13 inner surface, 14 relief recess, 15 cavity portion, 20 sealing material, 21 rigid portion, 22 elastic member, 22b lip Part, 40 rod head, 42 inner peripheral wall, 42g annular groove, 100 hammer, 200 slide hammer, 201 shaft part, 202 hammer part, AL shaft.

Claims (4)

A resin sealing material press fitting jig used for press fitting an annular sealing material to a rod head having a cylindrical inner peripheral wall extending in the axial direction inside,
The sealing material is press-fitted into an annular groove recessed in the radial direction provided on the inner peripheral wall,
The annular groove is open to the outside on one side in the axial direction,
The sealing material includes an annular rigid portion on the outer side in the radial direction, and an annular elastic member on the inner side of the rigid portion,
The sealing material press fitting jig is
A disc-shaped portion that comes into contact with the rigid portion of the sealing material from the one side in the axial direction;
A cylindrical portion extending from the disc-shaped portion so as to pass through the inside of the annular sealing material, and having an outer diameter substantially the same as the inner diameter of the inner peripheral wall,
When press-fitting and mounting the sealing material in the annular groove using the sealing material press-fitting mounting jig,
The sealing material press-fitting mounting jig is pushed in while the disk-shaped portion is in contact with the rigid portion of the sealing material and the cylindrical portion passes through the inside of the elastic member. , Fixing tool for press fitting of sealing material.   The said cylindrical part is a jig | tool for sealing material press fit mounting of Claim 1 which has a cavity part extended toward the said disk-shaped part from the edge part opposite to the said disk-shaped part. The elastic member of the sealing material has an extending region that protrudes from the rigid portion in the axial direction,
On the side of the disk-shaped part where the cylindrical part is provided, a relief recess is provided which is recessed along the axial direction and receives the extension region when the disk-shaped part comes into contact with the rigid part. 3. A sealing material press-fitting mounting jig according to claim 1 or 2.   The attachment part for attaching a slide hammer is provided in the surface on the opposite side to the side in which the said cylindrical part of the said board-shaped part is provided, The any one of Claims 1-3. Jig for fitting the seal material.

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