JPH06198571A - Wrench - Google Patents

Abstract

PURPOSE:To handle various sizes of bolts or the like by a single wrench by providing a wrench for screw-driving a bolt and a nut, which comprises a main body wrench and a required number of socket wrenches which are built inside the main body wrench in such a manner as to freely move forward and backward and are gradually decreased in their diameters. CONSTITUTION:A wrench is provided with screw-driving parts 4,4 disposed on both sides of a bar-like part for forming the central grip part. Each screw- driving part 4 comprises a main body wrench 1 integral with the bar-like part and socket wrenches 2 built in the main body wrench through a spring 5 in such a manner as to move forward and backward. At this time, two socket wrenches 2 are built in the left side large screw-driving part 4, and one socket wrench 2 is built in the right side small screw-driving part 4. The respective socket wrenches 2 are formed like a hexagonal cylinder in such a manner that the rear ends thereof are provided with an extended part as a stopper and they have sequential different sizes. Thus, the right and left main body wrenches 1 and socket wrenches 2 are used properly to screw-drive bolts and nuts of five sizes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrench capable of screwing various sizes of bolts and nuts.

[0002]

2. Description of the Related Art Conventionally, there are wrenches in which large and small wrenches are arranged at both ends and a set of several wrenches of different sizes are gradually set.

[0003]

In the past, one wrench could only turn bolts and nuts of two sizes, large and small. The only way to find a wrench that was the same size as the head of a bolt or nut was to actually try multiple wrenches. If the size of the wrench is large, it is too loose, and if it is small, it cannot be inserted and cannot be screwed. A wrench
It took a lot of time to check each book, and it often took more time to find a wrench than a screwdriver, and the work efficiency was very poor.

Since a number of wrenches must be put in the tool box, it is bulky and heavy, and it is inconvenient to carry. It was easy to lose, and the wrench that was frequently used was particularly dangerous.

An object of the present invention is to provide a wrench for solving the above-mentioned problems of the conventional wrench.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a wrench for screwing a bolt or a nut is composed of a main body wrench and a required number of socket wrenches which are internally retracted therein and have a successively smaller diameter. The present invention relates to a wrench characterized by being made.

[0007]

With the wrench according to the present invention, not only the main body wrench 1 but also the required number of socket wrenches 2 with a successively smaller diameter, which are installed inside the main body wrench, can be used to screw the heads 3 of bolts and nuts. The greatest feature is where you can.

The wrench according to the present invention may be arranged at one end or at one end.

The method of use is simple. First, the screwdriver 4 of the wrench is pressed against the head 3 of the bolt or nut. Then, if there is a socket wrench 2 smaller than the size of the head 3 of the bolt or nut, only the socket wrench 2 moves backward, and the head 3 of the bolt or nut 3
Can be screwed into a socket wrench 2 or a body wrench 1 having an inner diameter corresponding to the size, and screwed.

In the case of a bolt or nut having a size corresponding to the smallest diameter socket wrench 2, the socket wrench 2 does not retract, and the innermost smallest diameter socket wrench 2 fits the head 3 of the bolt or nut, A screwdriver can be used. For example, it is as shown in FIG.

In the case of a bolt or nut having a size corresponding to the intermediate diameter socket wrench 2, a part of the internally installed socket wrench 2 is retracted so that the intermediate diameter socket wrench 2 moves the head 3 of the bolt or nut. It can be inserted and screwed. For example, it is as shown in FIG.

In the case of a bolt or nut having a size corresponding to the maximum diameter main body wrench 1, all the socket wrench 2 installed therein are retracted so that the outermost maximum diameter main body wrench 1 is the head 3 of the bolt or nut. Can be inserted and screwed. For example, it is as shown in FIG.

Socket wrench 2 installed inside the body wrench 1
The number of can be any number as long as it is 1 or more. The number of body wrench 1 and socket wrench 2 arranged on the entire wrench determines how many types of bolts and nuts can be screwed.

The mechanism for retracting and restoring the socket wrench 2 is not particularly limited. There could be springs, rubber, screw type, and other devices. If the heads 3 of the bolts and nuts are always facing upward, the weight of the socket wrench 2 can be restored naturally.

[0015]

Embodiments of the present invention will be described with reference to the accompanying drawings, but it goes without saying that the present invention should not be limited to these embodiments.

FIG. 1 is a sectional view showing a first embodiment of the present invention. This embodiment is a hexagonal wrench. The central bar is the grip. Screwdrivers 4 on both ends of the rod,
4 are arranged. Reference numeral 1 in the figure denotes a main body wrench integrally formed with a rod-shaped portion on the outermost side of the screwdriver portion 4.
Reference numeral 2 in the figure is a socket wrench that is inserted from the inside of the main body wrench 1 and is internally installed so as to be retractable and recoverable. Socket wrench 2
Has a hexagonal tube shape and an enlarged portion is formed at the rear end as a stopper. The large screwdriver 4 on the left side of FIG. 1 is provided with two socket wrenches 2 and the small screwdriver 4 on the right side is internally provided with one socket wrench 2.

The small screwdriver portion 4 on the right side of FIG. 1 has a body wrench 1 having an inner diameter of 19 mm and a socket wrench 2.
Has an inner diameter of 15 mm. Regarding the size of the large screwdriver 4 on the left side of FIG. 1, the inner diameter of the main body wrench 1 is 21 mm, the inner diameter of the middle socket wrench 2 is 17 mm, and the inner diameter of the innermost socket wrench 2 is 10 mm.

Reference numeral 5 in the drawing denotes a spring for restoring the retracted socket wrench 2.

FIG. 4 is a sectional view of a screwdriver portion 4 showing a second embodiment of the present invention. Reference numeral 6 in the drawing denotes a rubber attached to restore the retracted socket wrench 2.

FIG. 5 is a side view of a screwdriver portion 4 showing a third embodiment of the present invention. Reference numeral 7 in the drawing denotes a knob for retracting and restoring the socket wrench 2. A screw is cut on the inner circumference of the knob 7 and the outer circumference of the socket wrench 2, and a mechanism for retracting and restoring the socket wrench 2 by turning the knob 7 is shown. Is.

[0021]

As described above, the wrench according to the present invention has the following unique effects.

A single wrench can be used to screw various sizes of bolts and nuts. Therefore, there is no need to search for a wrench that matches the size. The work efficiency is very high, and the time required to turn the bolts and nuts can be greatly reduced.

It is sufficient to put only one wrench in the tool box, which is easy to organize and easy to carry. Easy to check and less risk of loss.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a plan view showing a large screwdriver and a small screwdriver according to the embodiment.

FIG. 3 is an explanatory diagram showing an example.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a side view showing a third embodiment of the present invention.

[Explanation of symbols]

 1 body wrench 2 socket wrench.

Claims (1)

[Claims] 1. A wrench for screwing a bolt or a nut, which comprises a main body wrench and a socket wrench of a required diameter that is retractably installed inside the main body and has a successively smaller diameter.