JPS5928770Y2 - Bolt driver with square hole - Google Patents

Description

[Detailed description of the invention] This invention relates to a square hole bolt driver that rotates and loosens and tightens square hole bolts such as hexagon socket bolts.The front end of the shaft is inserted into the square hole of the square hole bolt. A main insert body and a sub-insert body on the rear side of the main insert body are formed to extend the service life and reduce the cost.

Normally, an L-shaped hex wrench with a hexagonal cross section is used to rotate and loosen square socket bolts, such as hexagon socket bolts. , there is a drawback that the work is difficult.

Therefore, conventionally, a substantially spherical insert whose cut surface perpendicular to the shaft is hexagonal is formed at the front end of a shaft whose base is supported by a handle (a small diameter portion is formed at the rear of the insert). Only a hexagon socket head bolt driver is used, and by inserting the insert from an oblique direction into the hexagon hole of the hexagon socket head bolt, and rotating the handle and rotating the insert through the shaft, the hexagonal part on the outer periphery of the insert It engages with a hexagon socket and is designed to counteract the hexagon socket head bolt.

Therefore, since the insert at the front end of the shaft is almost spherical, it can be inserted into the hexagonal hole from any direction, making it easy to work even if there are obstacles nearby or in deep places. There are advantages.

However, this hexagon socket head bolt driver has only one insert at the front end of the shaft, so if the corners of the insert wear out over a long period of use, it may become difficult to tighten or loosen the hexagon socket head bolt. It becomes unusable and the insert must be discarded together with the shaft, which is extremely wasteful.

Furthermore, if the base of the shaft is fixed to the handle, the handle must also be discarded.

This idea was made with the above points in mind,
At the front end of the shaft, the base of which is supported by the handle, is formed a main insert whose cut surface perpendicular to the shaft is polygonal and approximately spherical and which is inserted into the square hole of the square socket bolt. A sub-insertion body having the same shape as the main insert body is formed on the rear side of the insert body via a small-diameter portion, and a small-diameter portion is formed on the rear side of the sub-insertion body.

Therefore, if each corner of the main insert at the front end of the shaft wears out, by cutting the main insert at the small diameter section on the rear side, the sub insert can be inserted into the square hole of the square hole bolt. The bolt with a square hole can be rotated in the same way as the main insert, the lifespan is twice as long as before, the cost is lower, and all you need to do is cut the small diameter part at the rear of the main insert. , and the work is simple.

Next, this invention will be explained in detail with reference to drawings showing one embodiment thereof.

, in the drawings, 1 is a substantially cylindrical handle; 2 is six protrusions in the axial direction provided at equal intervals on the outer periphery of the handle 1 and integrally formed with the handle 1;
This is to improve the grip of the handle 1 and the rotational operation of the handle 1.

Reference numeral 3 designates a shaft with a hexagonal cross section whose base is supported by the handle 1. Two wing-shaped detent pieces 4 are integrally formed in the base of the shaft 3, that is, the rear end thereof in the axial direction. 3 is integrally supported by the handle 1 by press-fitting its base into the handle 1 or by embedding it during molding of the handle 1.

A main insert body 5 is formed at the front end of the shaft 3 and has a regular hexagonal cut surface perpendicular to the shaft 3 and a substantially spherical shape, and is inserted into a hexagonal hole of a hexagon socket head bolt.

6 is a main small diameter portion formed on the rear side of the main insert body 5 and has a regular hexagonal cross section; I is formed on the back side of the main small diameter portion 6 and is a main small diameter portion of the main insert body 5;
A sub-insertion body 8 having the same shape as the sub-insertion body 7 is a sub-small diameter portion formed on the rear side of the sub-insertion body 7 and having a regular hexagonal cross section.

FIG. 3 shows an example of the state of use of the square hole bolt driver of this invention, where 9 is a base, 10 is an object to be attached on the base 9,
Reference numeral 11 denotes a hexagon socket head bolt for fastening the mounting object 10 onto the base 9 inside, and has a hexagon socket 12 formed in its head.

Then, when tightening or loosening the hexagon socket head bolt 11,
As shown in the figure; the shaft 3 of the square socket head bolt driver is inserted into the opening 13 of the object to be attached 10, and the main insert body 5 is inserted into the hexagon hole 12 of the hexagon socket head bolt 11.

At this time, since the main insert 5 is approximately spherical, the main insert 5 can be inserted into the hexagonal hole 12 from any direction, and the main insert 5 can be rotated through the shaft 3 by rotating the handle 1. By this, each corner of the outer periphery of the main insert body 5 has a hexagonal hole 1.
The hexagon socket head bolt 11 is engaged with each corner of the inner circumference of
is rotated.

As shown in the same figure, when the shaft 3 is inclined at a predetermined angle with respect to the hexagon socket head bolt 11, the main small diameter portion 6 comes into contact with the upper edge of the hexagon socket 12, and the main insertion portion inserted into the hexagon socket 12 The body 5 can be rotated more smoothly.

If the main insert body 5 at the tip of the shaft 3 is worn out due to long-term use, the main insert body 5 is removed from the main small diameter portion 6 on the rear side.
When the front end surface of the sub-insertion body 7 is polished, the sub-insertion body 7 can be inserted into the hexagon hole 12 of the hexagon socket head bolt 11, and the hexagon socket head bolt 11 can be rotated in the same manner as described above.

Therefore, according to the embodiment, even if the main insert 5 of the shaft 3 is worn out and cannot be used for bolt driving, the main insert 5 can be cut at the main small diameter portion 6, and the sub insert 7 can be removed.
can be used as a new bolt driver, and compared to the conventional type with only one insert at the front end of the shaft, it can have twice the lifespan and be cheaper. .

Note that this invention is not limited to the above-mentioned embodiments, and the cross-sectional shapes of the main insert body and the sub-insert body may be formed into other polygons other than regular hexagons. This is a bolt with a polygonal hole that can be rotated.

Moreover, if third, fourth, etc. inserts are further formed on the rear side of the sub-insert 7, the life can be further extended.

In addition, the base of the shaft may be detachably supported by the handle, and if an intermediate tool for extension is interposed between the handle and the shaft, it is possible to rotate square hole bolts in deeper locations. It is.

[Brief explanation of drawings]

The drawing shows one embodiment of the square hole bolt driver of this invention,
Figure 1 is a partially cutaway plan view, Figure 2 is a partial front view, and Figure 3 is a partially cutaway plan view.
The figure is a cross-sectional view of a portion showing the state of use. 1...Handle, 3...Shaft, 5...
... Main insert body, 6 ... Main small diameter part, 7 ...
... Sub-insertion body, 8... Sub-small diameter part, 11...
...Hexagon socket head bolt, 12...Hexagon socket.

Claims (1)

[Scope of utility model registration request] At the front end of the shaft, the base of which is supported by the handle, is formed a main insert whose cut surface perpendicular to the shaft is polygonal and approximately spherical and which is inserted into the square hole of the square socket bolt. A bolt driver with a square hole, in which a sub-insertion body having the same shape as the main insert body is formed on the rear side of the insert body through a small-diameter portion, and a small-diameter portion is formed on the rear side of the sub-insert body.