JPH0929651A - Attachment mounting member in fastening tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely and surely prevent a connecting pin from being drawn out by providing a band-like elastic body having the width larger than a peripheral groove formed in a position to which a pin hole of an attachment opens and providing projectingly a projecting line integrally fitting the peripheral groove in the nearly central part of the inner circumferential surface of the band-like elastic body. SOLUTION: A socket 2 as an attachment mounted to the tip of a spindle 1 of a fastening tool is fitted in the spindle 1 of the fastening tool 5. By inserting a connecting pin 3 into overlapping pin holes formed in the spindle and socket 2, the socket 2 is mounted to the spindle. Then, the socket 2 is formed in a pin hole opening position of the socket 2 around the whole periphery of the socket 2 with a peripheral groove having the width nearly equal to the diameter of the pin hole 21. After inserting the connecting pin 3, a mounting member 4 made of a band-like elastic body having the width larger than the peripheral groove 22 is fitted in the peripheral groove 22 such that a projecting line 41 projectingly provided on the inner circumferential surface of the mounting member 4 engages the peripheral groove 22 to prevent the connecting pin 3 from being drawn out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting member for an attachment, such as an attachment, which is mounted on the tip of a main shaft of a tightening tool, and more particularly to insert a joining pin into a pin hole formed in the main shaft and the attachment of the tightening tool. The present invention relates to an attachment mounting member in a tightening tool in which an attachment is mounted on a spindle.

[0002]

2. Description of the Related Art Conventionally, as a method of attaching an attachment such as a socket in a tightening tool, as shown in FIG.
Pin hole 1 formed in the spindle 1 and socket 2 of the tightening tool
The socket 2 is attached to the spindle 1 by inserting the joining pin 3 into the pins 1 and 21, and the O-ring 4'is fitted into the circumferential groove 22 formed at the position where the pin hole 21 of the socket 2 is opened. A method of preventing the joining pin 3 inserted in the 11, 21 from coming off is adopted.

[0003]

By the way, in the attachment method of the attachment in the above-mentioned conventional tightening tool,
Since the O-ring 4'provided to prevent the joining pin 3 inserted into the pin holes 11 and 21 from coming off is made of an elastic body, it is possible to attach and detach the O-ring 4'to the circumferential groove 22 of the socket 2 very easily. For this reason, the socket 2 can be quickly attached and detached, and it has many advantages such as preventing invasion of dust and the like into the pin holes 11 and 21. Therefore, it is widely used at present. There is. By the way, in recent years, as the output of this type of tightening tool has increased, the impact force applied to the joining pin 3 has increased, and in proportion to this, the O-ring 4'provided to prevent the joining pin 3 from coming off. Since the impact force applied to the O-ring 4'is also large, the strength and durability of the O-ring 4'may be insufficient.
In order to deal with this, it is conceivable to increase the rigidity of the O-ring 4 ', but if the rigidity of the O-ring 4'is increased, it becomes difficult to mount and dismount the O-ring 4'in the circumferential groove 22 of the socket 2. In addition, there is a problem that durability is reduced.

According to the present invention, even when a large impact force is applied to the joining pin while maintaining good attachment and detachability of the attachment of the conventional O-ring to the circumferential groove,
An object of the present invention is to provide a mounting member for an attachment in a tightening tool, which can absorb the movement of the joining pin in the axial direction, prevent the joining pin from coming off safely and reliably, and has durability.

[0005]

In order to achieve the above object, the attachment member of the attachment in the tightening tool of the present invention has a main shaft formed by inserting a joining pin into the main shaft of the tightening tool and a pin hole formed in the attachment. An attachment mounting member in a tightening tool adapted to mount an attachment, which comprises a band-shaped elastic body having a width larger than a circumferential groove formed at a position where a pin hole of the attachment is opened, and an inner circumference of the band-shaped elastic body. It is characterized in that a ridge that fits into the circumferential groove is integrally provided substantially at the center of the surface.

By disposing the attachment mounting member in the tightening tool of the present invention having the above-mentioned structure around the peripheral groove of the attachment, a large impact force is applied to the joining pin so that the joining pin is axially moved. When trying to move, the end of the joining pin is received by the strip-shaped elastic body that integrally projects the ridge that fits into the circumferential groove in the approximate center of the inner peripheral surface, and absorbs the axial movement of the joining pin. Prevent the connecting pin from coming off. In this case, the band-shaped elastic body has a width larger than the circumferential groove formed at the position where the pin hole of the attachment is opened, so that the joining pin can be prevented from coming off safely and reliably.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of attachment members for attachments in a tightening tool according to the present invention will be described below with reference to the drawings.

In this embodiment, a socket 2 is attached to the tip of the main shaft 1 of the tightening tool 5 as an attachment. First, the socket 2 is fitted into the spindle 1 of the tightening tool 5, the joint pins 3 are inserted into the pin holes 11 and 21 formed in the spindle 1 and the socket 2, and the socket 2 is integrally attached to the spindle 1.

The socket 2 has a pin hole 21 of the socket 2.
The circumferential groove 22 around the entire circumference of the socket 2 at the position where the
The peripheral groove 22 is formed so as to have a width that is approximately the same as the diameter of the pin hole 21 and a depth that is approximately 1/2 the diameter of the pin hole 21.

A pin hole 1 formed in the spindle 1 and the socket 2.
With the joining pin 3 inserted into the pins 1 and 21, the mounting member 4 made of a band-shaped elastic body having a width larger than that of the circumferential groove 22 formed in the socket 2 is arranged so as to cover the entire surface of the circumferential groove 22. In this case, the protrusion 41 integrally provided at substantially the center of the inner peripheral surface of the mounting member 4 is arranged so as to fit into the circumferential groove 22 formed in the socket 2, and thus the mounting member 4 for the socket 2 is mounted. When a large impact force is applied to the joining pin 3 and the joining pin 3 tries to move in the axial direction, the end portion of the joining pin 3 is integrally received by the strip-shaped elastic body including the ridge. , Absorb the axial movement of the joining pin to prevent the joining pin from coming off.

Like the conventional O-ring, the mounting member 4 is made of an elastic material such as synthetic rubber. Therefore, the mounting member 4 can be attached to and detached from the socket 2 very easily. The mounting member 4 can be quickly attached and detached, and the mounting member 4 is made of a band-shaped elastic body having a width larger than that of the circumferential groove 22 formed at the position where the pin hole 21 of the socket 2 is opened. In addition, it is possible to prevent dust and the like from entering the pin holes 11 and 21.

The width of the mounting member 4 is not limited as long as it is wider than the circumferential groove 22. However, in consideration of mounting to the socket 2, releasability, strength, etc.
It is preferable to design the width to be about four times.

In the above embodiment, the attachment member of the attachment in the tightening tool of the present invention is used as the spindle 1 of the tightening tool 5.
Although the case where the socket 2 is attached to the tip of the above is described as an example, the present invention is not limited to this and can be widely applied to attachments of the same structure other than the socket.

[0014]

According to the attachment mounting member of the tightening tool of the present invention, when a large impact force is applied to the joining pin and the joining pin is about to move in its axial direction,
The end of the joining pin is received by a mounting member made of a band-shaped elastic body that integrally projects a ridge that fits into the circumferential groove in the approximate center of the inner peripheral surface, absorbs axial movement of the joining pin, and Since the mounting member made of an elastic body has a width larger than the circumferential groove formed at the position where the pin hole of the attachment is opened, it is durable, safe and sure to prevent the joining pin from coming off. it can. Further, the attachment mounting member in the tightening tool of the present invention can be applied as it is to the existing tightening tool using the O-ring, which is extremely practical.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of an embodiment using a mounting member of an attachment in a tightening tool of the present invention.

2A and 2B show a mounting member of an attachment in the tightening tool of the present invention, FIG. 2A is a front vertical sectional view, and FIG. 2B is a side view.

FIG. 3 is a diagram showing an embodiment using a mounting member of an attachment in the tightening tool of the present invention.

FIG. 4 is a cross-sectional view showing a method of mounting an attachment in a conventional tightening tool using an O-ring.

[Explanation of symbols]

 1 Spindle 11 Pin Hole 2 Socket (Attachment) 21 Pin Hole 22 Circumferential Groove 3 Joining Pin 4 Mounting Member (Band-shaped Elastic Body) 41 Projection 5 Tightening Tool

Claims (1)

[Claims] 1. A mounting member for an attachment in a tightening tool, wherein a joining pin is inserted into a pin hole formed in the main shaft and the attachment of the tightening tool to attach the attachment to the main shaft, wherein the pin hole of the attachment is A strip-shaped elastic body having a width larger than that of the circumferential groove formed at the opening position, and a protrusion that fits into the circumferential groove is integrally provided substantially at the center of the inner circumferential surface of the strip-shaped elastic body. Attachment mounting member for tightening tools.