JP2003039257A - Jig for fixing o-ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for fixing O-rings, by which work for fixing the O-rings to a plurality of grooves is efficiently carried out and an exact guiding position for the O-rings can be obtained. SOLUTION: When fixing O-rings r into a plurality of O-ring grooves m, n on an outer periphery of a shaft S, a jig body 2 is positioned by bringing a lower block 5 of the jig body 2 into contact with a bush B in a hollow portion of the shaft S. In such a state that a spring 12 elongates to its full length, an O-ring r is fitted into a lower groove n utilizing guide surfaces 10g, 11g of a guide member 3 (an upper guide 10, a lower guide 11). After that, another O-ring r is fitted into an upper groove m in such a state that a positioning pin 8 is engaged with a lower bent portion of an almost L-shape hole 10i by compressing the spring 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary jig for attaching O-rings to a plurality of grooves of a mission shaft in a mission assembly line of a vehicle engine, for example.

[0002]

2. Description of the Related Art Conventionally, for example, a shaft S of a vehicle engine mission has a plurality of grooves formed along the axial direction. ), As shown in FIG.
After covering the shaft S with the guide member 51 having the O-ring r in the lower groove, as shown in FIG. 3B, the guide member 52 of the fitting recess 52d having a shallow depth is covered. Then, the O-ring r is attached to the upper groove, and the plurality of guide members 51 and 52 are selectively used so as to avoid the groove in the middle.

[0003]

However, in the method in which the plurality of guide members 51 and 52 are selectively used as described above, two members are required, which is costly, and at the same time, a loss of work such as replacement occurs. There was a problem of doing.
Further, since the positioning reference of each guide member 51, 52 is the outer surface end portion of the work, it is possible to prevent O
There is also a problem that the position for guiding the ring is likely to vary.

Therefore, in the present invention, O is formed in each of the plurality of grooves.
It is an object of the present invention to provide an O-ring mounting jig that can efficiently perform work such as mounting a ring and that can accurately guide the O-ring.

[0005]

In order to achieve the above object, the present invention provides a jig main body which is positioned in contact with a predetermined portion of a work, and a guide which can be repositioned in multiple stages with respect to the jig main body. A member was provided, and the outer surface of this guide member was used as a guide surface for attaching the O-ring.

Then, the jig main body is brought into contact with a predetermined portion of the work to be positioned, and the position of the guide member is changed in a multistage manner so that the end portion of the guide member becomes a multistage O-ring mounting groove or the like. The O-ring is guided along the outer surface of the guide member so as to be aligned, and is mounted in each groove or the like. With this method, a single jig can be used to
Since the ring can be attached, it is possible to suppress the occurrence of work loss and reduce the chances of occurrence of troubles such as dropping.

Further, according to the present invention, a biasing member is interposed between the jig body and the guide member. By interposing the biasing member in this manner, the position changing operation can be performed easily, and the position of the guide member can be held in a more stable state after the position changing, etc. Guide position accuracy is stable.

Further, in the present invention, the portion where the jig body comes into contact with the work is in the recess of the work. As described above, when the jig main body is brought into contact with the inside of the concave portion of the work for positioning, the influence of burrs and the like is eliminated and the positioning reference is stabilized as compared with the case where the jig main body is brought into contact with the outer surface of the work.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a longitudinal sectional view of an O-ring mounting jig and an O-ring mounting portion according to the present invention, and FIG.
Is an action diagram.

The O-ring mounting jig according to the present invention enables a plurality of O-rings to be mounted on a shaft of a mission of a vehicle engine by a single jig when mounting a plurality of O-rings in multiple stages. Therefore, the work can be done efficiently.

Here, the shaft S of the mission is shown in FIG.
As shown in FIG. 3, the material is a hollow material, and the bush B is press-fitted into the hollow portion at a predetermined position, and the outer surface is
A plurality of stages of O-ring mounting grooves m and n are formed in the axial direction. The O-ring mounting jig 1 is provided with the bush B
The jig main body 2 described below is positioned by using the above, and the O-ring r is attached to each of the grooves m and n.

The O-ring mounting jig 1 includes a jig body 2, a guide member 3 whose position can be changed with respect to the jig body 2,
A spring 12 as an urging member interposed between the two is provided, and in this embodiment, the guide member 3 can be adjusted in position in two steps.

The jig body 2 includes a shaft member 4 and a lower block 5 connected to the lower end of the shaft member 4.
The shaft member 4 is provided with a knurled portion 6 integrated with the upper end portion thereof. A flange portion 7 is formed at an intermediate portion of the shaft member 4, and a positioning pin 8 is provided near the upper end portion of the shaft member 4. Is projected.

In the guide member 3, an upper guide 10 and a lower guide 11 are connected via a screw portion, and a through hole 10h into which the shaft member 4 can be inserted and a positioning pin 8 are inserted in the upper guide 10. A substantially L-shaped hole 10i which can be inserted is formed. Further, in the lower guide 11, the stepped hole 11d on the upper side and the fitting hole 11c on the lower side communicate with each other, and between the bottom surface of the stepped hole 11d and the flange portion 7 on the shaft member 4 side. Further, the spring 12 is interposed, and urges the jig body 2 and the guide member 3 in the extension direction. The outer surfaces of the upper guide 10 and the lower guide 11 are guide surfaces 10g and 11g that guide the O-ring r.

Then, due to the urging force of the spring 12,
The positioning pin 8 on the shaft member 4 side has a substantially L-shaped hole 10i.
From the state in which the positioning pin 8 is in contact with the upper end of the positioning pin 8, the locator pin 8 can be moved depending on whether the operator pushes down the knurled portion 6 to rotate it about the axis, or pushes up the guide member 3 to rotate it about the axis. The relative position can be changed in two steps by engaging with the bent portion at the lower end of the substantially L-shaped hole 10i.

Further, the fitting hole 11c of the lower guide 11 is provided.
Can be fitted to the outer peripheral portion of the end of the shaft S of the mission, and the lower block 5 can be inserted into the hollow portion of the shaft S of the mission so as to abut the upper end of the bush B. Has been

The operation of the O-ring mounting jig 1 as described above will be described with reference to FIG. As shown in FIG. 2A, the lower block 5 is inserted into the hollow portion at the end of the shaft S of the mission and brought into contact with the bush B to position the jig body 2. At this time, the jig body 2 and the guide member 3
Is in the most extended state by the spring 12,
The lower end of the lower guide 11 is located slightly above the lower O-ring mounting groove n.

In this state, the O-ring r is fitted from above the guide member 3 and pushed downward along the guide surfaces 10g and 11g on the outer surfaces of the respective guide portions 10 and 11, so that the O-ring r is in the lower groove n. Be attached to.

Next, the operator pushes up the guide member 3 while compressing the spring 12 and rotates it in a predetermined direction to engage the positioning pin 8 with the bent portion of the substantially L-shaped hole 10i. In this state, as shown in FIG. 2B, the jig body 2 and the guide member 3 are in the most contracted state, and the lower end portion of the lower guide 11 is positioned slightly above the upper O-ring mounting groove m. To do.

Then, from above the guide member 3, an O-ring r
The guide surface 1 on the outer surface of each guide portion 10, 11
By pushing it down along 0g and 11g,
The ring r can be mounted in the upper groove m. After the mounting work is completed, for example, if the knurled portion 6 is rotated to disengage the positioning pin 8 from the bent portion at the lower end of the substantially L-shaped hole 10i, the original force is automatically applied by the spring 12 force. It can be returned to the state.

According to the above procedure, the two O-rings r can be mounted with a single jig, the working efficiency is improved, and various troubles caused by dropping the jig are suppressed. Can be done. Further, since the location where the lower block 5 abuts and serves as a positioning reference is the bush B in the hollow portion, there is no problem that the positional accuracy becomes unstable due to burrs or the like as in the case of abutting the outer surface, In addition, when there is a large displacement or the like at the lower end of the lower guide 11, there is a secondary effect that a press-fitting defect of the bush B can be found.

The present invention is not limited to the above embodiment. Those having substantially the same configurations as those described in the claims of the present invention and exhibiting the same operational effects belong to the technical scope of the present invention. For example, the position adjustment of the guide member 3 is not limited to two steps,
Further, the type of work and the like are also arbitrary.

[0023]

As described above, in the O-ring mounting jig according to the present invention, the jig main body is brought into contact with a predetermined portion of the workpiece for positioning, and the position can be changed in multiple stages with respect to the jig main body. Since the guide member is provided and the outer surface of the guide member is used as the guide surface for mounting the O-ring, it is possible to mount the O-rings at a plurality of locations with a single jig.
It is possible to suppress the occurrence of work loss and reduce the chances of occurrence of troubles due to dropping or the like. Further, if a biasing member is provided between the jig body and the guide member, the position changing operation and the like can be performed easily and the O-ring guide position accuracy is stabilized. Further, by making the place where the jig body comes into contact with the work inside the concave portion of the work, the influence of burrs and the like caused by coming into contact with the outer surface of the work is eliminated, and the positioning reference is stabilized.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an O-ring mounting jig and an O-ring mounting portion according to the present invention.

[Fig. 2] Operation diagram of O-ring mounting jig

[Fig. 3] Operation diagram of conventional O-ring mounting

[Explanation of symbols]

1 ... O-ring mounting jig, 2 ... Jig body, 3 ... Guide member, 5 ... Lower block, 10 ... Upper guide, 10g ... Guide surface, 11 ... Lower guide, 11g ... Guide surface, 12 ...
spring.

Continued front page    F-term (reference) 3C030 BB14                 3J043 AA12 AA16 BA08 CA01 DA09                       DA10

Claims (3)

[Claims] 1. A jig main body which is brought into contact with a predetermined portion of a work to be positioned, and a guide member which can be repositioned in multiple stages with respect to the jig main body, and an outer surface of the guide member is
An O-ring mounting jig, which is a guide surface for mounting an O-ring. 2. The O-ring mounting jig according to claim 1, wherein a biasing member is interposed between the jig body and the guide member. 3. The O-ring mounting jig according to claim 1, wherein the jig main body is in contact with the work in a concave portion of the work. .