JPS6130866B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an O
O for fitting the ring into the O-ring groove of the shaft hole.
The present invention relates to a ring inserter.

In order to prevent fluid from leaking, it is recommended to fit a rubber O-ring into a groove in the inner wall of the shaft hole of a movable shaft installed in a place where air or oil fluid is generally used. It's being done.

Conventionally, in such cases, fitting the O-ring into the groove was done manually using a wire or the like.

However, this type of conventional method has disadvantages in that the O-ring is easily damaged during fitting, is time-consuming, and the work varies from person to person, resulting in poor workability. Furthermore, if the groove is deep in the hole, the work is very difficult.

The present invention has been made in order to eliminate the above-mentioned drawbacks in work, and it prevents damage to O-rings during fitting, eliminates individual differences in work, shortens work time, and improves work efficiency. The purpose of this invention is to improve this, and also to allow easy fitting into grooves located deep in the hole.

Embodiments of the invention will now be described with reference to the accompanying drawings.

FIG. 1 is a plan view showing one embodiment of the O-ring inserter of the present invention, and FIG. 2 is a longitudinal sectional view when the O-ring is set.

The main body 3 includes a hollow cylinder 1 whose one end is a thin cylinder.
is formed on the outer periphery of the hollow cylinder 1, and an adjustment screw 12 is formed concentrically with the hollow cylinder 1 at a distance from the front end surface 1a of the thin-walled cylinder, and a depth adjustment collar 3a is screwed onto the adjustment screw 12. In this case, a side wall portion 2 is provided around the outer periphery of the thin cylinder at a distance from the front end surface 1a, and a tightening screw 12a is implanted in the side wall,
By changing the engagement length of the adjustment screw 12, the front end surface 1a
After adjusting the distance between the
The depth adjustment collar 3a is fixed to the main body 3 by a. Further, a piston 5 is slidably provided in the hollow cylinder 1, and a pressing member 6 is integrally formed coaxially with the piston 5 so as to penetrate through the main body 3 having the hollow cylinder 1. A knob 6a is fixed to the end, and a restoring spring 13 is provided between the main body 3 and the knob 6a.

On the other hand, an O-ring guide shaft 4 is slidably provided penetrating the center axis of the piston 5, and the O-ring guide shaft 4 has a diameter equal to the outer diameter of the thin-walled cylinder at the tip of the guide shaft 4, facing the front end surface 1a. An O-ring guide 7 having a slightly smaller outer diameter is provided, and a guide positioning member 8 for orienting the position of the guide 7 is provided at the rear end. The vertical groove 10 is fitted in the vertical groove 11 provided in the longitudinal direction, and is provided in the longitudinal groove 10 on the opposite side of the front end surface 1a of the main body 3, or is provided at the rear end of the vertical groove perpendicular to the vertical groove. It is designed so that it can be fitted into any of the horizontal grooves 9 formed therein.

Note that the O-ring guide shaft 4 and the guide positioning member 8
It is advantageous to adjust the position of the O-ring guide 7 if it is screwed together with the threaded portion 4a of the guide shaft and fixed with the fixing screw 8a.

In order to insert the O-ring into the O-ring groove formed in the inner wall of the shaft hole using the O-ring inserter of the present invention, as shown in FIG. 10, pull out the O-ring guide 7 as shown in FIG.
After the ring O is inserted through the guide 7, it is pushed into the hollow cylinder 1 so as to surround the guide shaft 4. Next, as shown in FIGS. 3 and 7, after positioning the localization member 8 at the rear end of the vertical groove 10,
As shown in FIG. 8, it is rotated in the direction of the hour hand from the position shown in FIG. 7 to be positioned within the horizontal groove 9.

Note that FIG. 6 shows a sectional view taken along line AA in FIG. 3, FIG. 7 similarly shows a sectional view taken along line BB, and FIG. 8 shows a sectional view taken along line CC in FIG. 4, which will be described later. When the positioning member 8 is inserted into the horizontal groove 9 and positioned, the distance between the side wall portion 2 of the depth adjusting collar 3a and the O-ring guide 7 is determined by
Adjustment can be made by changing the relative position of the main body 3 and the depth adjustment collar 3a depending on the position of the ring groove, that is, the depth from the shaft hole opening. Also,
In the above case, the gap between the front end surface 1a and the O-ring guide 7 may be any distance as long as it is larger than the thickness of the O-ring, but between the O-ring groove of the instrument and the opening of the shaft hole into which the O-ring is to be fitted. When another groove is recessed in the groove, it is necessary to set the distance between the front end surface 1a and the side wall part 2 so that the O-ring does not fit into the other groove by mistake.

FIG. 4 shows the state when the O-ring O is fitted into the O-ring groove V of the shaft hole H. That is, as shown in FIG. 3, an O-ring inserter housing an O-ring O in a hollow cylinder 1 is inserted into the opening of a shaft hole H provided in a device X, as shown in FIG. After fitting the O-ring guide 7 and the thin-walled cylindrical part so that the side wall parts 2 of The shaft hole H is guided by the side surface 7' and is fitted into a groove V formed in the inner wall of the shaft hole H.

After that, the pressure on the knob 6a is released, and the O-ring guide 7 and the thin-walled cylindrical portion that have been fitted are pulled out.

Note that FIG. 5 shows a plan view of only the O-ring inserter when the positioning member 8 is positioned and the knob 6a is pressed. Further, in the embodiment, the side surface of the O-ring guide 7 for guiding the O-ring is formed into a low conical shape, but it may be flat.

Furthermore, although the above embodiment shows an O-ring inserter used when the O-ring groove V is recessed in the middle part of the shaft hole H, FIGS. This shows an O-ring inserter used for the O-ring groove recessed in the end of the.

In the figure, a main body 3 is formed with a hollow cylinder 1 whose one end is a thin cylinder, and a front end surface 1 of the thin cylinder.
A side wall portion 2 is provided around the outer periphery of the thin cylinder at a distance from a, and a piston 5 is slidably provided within the hollow cylinder 1, and a front end surface 1a is provided at the tip of the piston 5 on the central axis. The tip toward the side is the front end surface 1a
An O-ring guide shaft 4 is implanted to protrude slightly, and a pressing member 6 is integrally formed coaxially with the piston 5 through the main body 3, and a knob is provided at the rear end of the pressing member 6. 6a is fixed, and a restoring spring 13 is provided between the main body 3 and the knob 6a.

To fit the O-ring into the groove formed in the dead end of the shaft hole using this O-ring inserter, first insert the O-ring O into the main body 3 as shown in Fig. 9. The O-ring guide shaft 4 is inserted into the hollow cylinder 1 so as to surround it. Next, as shown in FIG. 10, after fitting the thin cylindrical part into the shaft hole Ha provided in the instrument X so that the opening of the shaft hole and the side wall part 2 of the inserter collide, the knob 6a is pressed. When the piston 5 is moved forward, the tilted O-ring O
first, its front end is the dead end Hc of the shaft hole Ha.
Then, the other end of the O-ring is pushed out by the piston 5, and the O-ring O is fitted into the groove V by being guided to the dead-end end Hc. Thereafter, the pressure on the knob 6a is released and the thin cylindrical portion fitted into the shaft hole is pulled out. In the figure, Hb is a small hole that is continuous with the shaft hole Ha and serves as a relief for the O-ring guide shaft 4.

The O-ring inserter shown in FIGS. 9 and 10 has a fixed length of the thin-walled cylindrical part, but the length of the main body 3 and the hollow cylinder 1 is fixed as in the above-mentioned embodiment. By screwing them together, the distance between the front end surface 1a of the hollow cylinder 1 and the side wall portion 2 can be adjusted.

As is clear from the above description, the O-ring inserter according to the present invention solves the operational disadvantage of manually inserting the O-ring into the O-ring groove of the shaft hole using a wire. Of the two types shown in the example, the O-ring inserter has only the O-ring guide shaft implanted in the piston at the insertion part into the hollow cylinder of the O-ring, and the O-ring inserter has only the O-ring guide shaft implanted in the piston at the insertion part into the hollow cylinder of the O-ring. By using a dead-end wall to guide the O-ring when fitting it into the O-ring groove recessed in the groove, it is possible to easily insert the O-ring into this type of O-ring groove with an extremely simple structure. On the other hand, an O-ring inserter of the type that has an O-ring guide facing the front end surface of a hollow cylinder at the tip of a guide shaft that can freely slide on a piston has the effect of being able to insert a It is easy to insert and install the O-ring into the hollow cylinder, and when fitting the O-ring into the O-ring groove recessed in the middle part of the shaft hole, the O-ring guide guides the O-ring to ensure and easily. This has the effect that an O-ring can be fitted into the O-ring groove. Moreover, these two types of O-ring inserters do not damage the O-ring during insertion, and
Easy operation eliminates individual differences in work and reduces work time, and improves work efficiency by using the two types of O-ring inserters mentioned above depending on the type of O-ring groove position. It has an effect on Furthermore, by making the thin cylindrical portion longer, there is an effect that it can be easily fitted into the deep groove of the hole.

[Brief explanation of the drawing]

The drawings show an embodiment of the O-ring inserter according to the present invention. Fig. 1 is a plan view showing one embodiment of the O-ring inserter, and Fig. 2 shows the O-ring guide being pulled out and the M-ring set. Figure 3 is a vertical cross-sectional view when the O-ring guide is pulled into the fixed position, and Figure 4 is when the O-ring is fitted into the groove of the shaft hole after the positioning member has been positioned in the horizontal groove. FIG. 5 is a plan view of only the inserter when the positioning member is positioned and the knob is pressed; FIGS. 6 and 7 are AA and BB cross-sectional views of FIG. 3; 8th
The figure is a cross-sectional view taken along the line C--C in Figure 4, Figure 9 is a vertical cross-sectional view when the O-ring is inserted into the inserter of another embodiment, and Figure 10 is a cross-sectional view of the O-ring inserted into the inserter shown in Figure 9. It is a longitudinal cross-sectional view when fitting an O-ring into the groove of a hole. 1...Hollow cylinder, 1a...Front end surface of thin cylinder,
2... Side wall, 3... Main body, 3a... Depth adjustment collar, 4... O-ring guide shaft, 5... Piston,
6... Pressing member, 6a... Knob, 7... O-ring guide, 8... Guide localization member, 9... Horizontal groove of main body, 10... Vertical groove of main body, 11... Vertical groove of pressing member, 12 ...adjustment screw, 13...restoration spring.

Claims (1)

[Scope of Claims] 1. An inserter main body 3 having a hollow cylinder 1 whose one end is a thin-walled cylinder, a side wall portion 2 circumferentially provided at a distance from the front end surface 1a of the thin-walled cylinder, and the hollow cylinder 1
A pressing member 6 includes a piston 5 that is slidably disposed inside the main body 3 and has an O-ring guide shaft 4 on the central axis, and also slides through the main body 3.
By pressing the pressing member, the O-ring inserted into the hollow cylinder 1 through the opening through the O-ring guide shaft 4 is fitted into the O-ring groove recessed in the inner wall of the circular hole. An O-ring inserter characterized by: 2. The O-ring inserter according to claim 1, wherein the distance between the front end surface 1a of the thin cylinder 1 and the side wall 2 provided around the cylindrical portion is adjustable. 3. A restoring spring 13 is provided between the knob 6a of the pressing member 6 and the inserter body 3 so that the piston 5 can be restored to its normal position within the hollow cylinder 1. O-ring inserter according to item 2. 4. An inserter main body 3 having a hollow cylinder 1 whose one end is a thin-walled cylinder, and a side wall portion 2 circumferentially provided at a distance from the front end surface 1a of the thin-walled cylinder, and the hollow cylinder 1.
a pressing member 6 having a piston 5 slidably provided therein and slidingly penetrating the main body 3; and a pressing member 6 slidably penetrating the main body 3; It has a ring guide 7,
A vertical groove 10 or vertical groove is fitted into a vertical groove 11 provided in the longitudinal direction of the pressing member 6 at the rear end portion, and is provided in the longitudinal direction of the inserter main body 3 on the opposite side of the front end surface 1a. It consists of an O-ring guide shaft 4 having a guide positioning member 8 fitted into a transverse groove 9 for orthogonal to the O-ring guide 7, and the O-ring guide shaft 4 is inserted by the pressure of the pressing member. An O-ring inserter characterized in that an O-ring inserted into a hollow cylinder 1 through an opening is fitted into an O-ring groove recessed in an inner wall of a circular hole. 5. The O-ring inserter according to claim 4, wherein the distance between the front end surface 1a of the thin cylinder 1 and the side wall 2 provided around the cylindrical portion is adjustable. 6. Claim 4 or 6, characterized in that a restoring spring 13 is provided between the knob 6a of the pressing member 6 and the inserter body 3 so that the piston 5 is restored to its normal position within the hollow cylinder 1. O-ring inserter according to item 5.