JPH01252368A - Torque induction type rotary tool - Google Patents

Abstract

PURPOSE:To make it possible to recognize visually the torque induction value and to avoid an overtorque by gearing the side surface of the base of a restoration arm which is pivoted rotatable at a handle for turning a torque wrench to the end surface of a neck grip, and linking an anticontraction spring to the tip of the restoration arm. CONSTITUTION:To the neck grip 4 of a torque wrench, the tip of a handle 1 for turning is linked along the wrench, and a restoration arm 2 which is a projection to the side from the tip of the handle 1 is pivoted rotatable. The side surface 2'' of the base of the restoration arm 2 and the end surface 4' of the neck grip 4 are made in a gearing condition, and an anticontraction spring 3 is provided between the tip of the restoration arm 2 and a spring receiver 13 which projects from the handle 1 to the side. In such a composition, when the handle 1 is turned in the arrow direction, the handle 1 and the neck grip 4 are operated integrally through an induction device (a) which consists of the restration arm 2 and the anticontraction spring 3, to fasten a nut 7. In this case, when the torque exceeds the regulated torque value, the tip of the restoration arm 2 contracts the anticontraction spring 3 in the arrow direction and is restored, and when it moves to a specific position, the turning is stopped because it reaches the regulated torque.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a torque-sensitive rotary tool such as a torque wrench or torque spanner having a torque-sensitive mechanism for tightening bolts, nuts, etc. to a predetermined torque value. be.

[Conventional technology]

Most conventional wrenches with a torque sensitive mechanism use a pipe as a handle member of the main body, and the torque sensitive mechanism is installed in the hollow portion of the pipe.

[Problem to be solved by the invention]

Conventional torque-sensitive rotary tools in which a torque-sensitive mechanism is installed in a pipe have the following problems.

■ Hand tools were originally made from forged steel, and when a strong torque was required for use, the handle was hit with a hammer to tighten.

Because of this habit, the pipe structure has the drawback that when it is struck with a hammer, the pipe deforms and the internal torque sensing device becomes inoperable.

■ Embodiment of the present invention In tools that require a china for bolt hole alignment at the end of the handle as shown in Figure 1, if the handle is a pipe, the china is connected to the pipe by some means. However, screws cannot withstand heavy use, and welding has the disadvantage that it is impossible to inspect the internal torque-sensitive device.

■ Since the torque sensing device is housed in the hollow space of the pipe, its component parts are limited in size and must be designed small, so the change over time of the torque sensing value (torque regulation value) due to wear of the parts1. big.

■ It is difficult for foreign objects such as pebbles and sand to enter the pipes, but once foreign objects enter the pipes or rust occurs, it is difficult for the user to repair the pipes.

Therefore, it is not suitable for civil engineering, construction, and outdoor work.

■ When the torque approaches the set value, there is no change in appearance, and the structure is such that a tactile sensation in the hand indicates that the torque value has been reached, but individual differences in reflexes on the workbench and operating speed Depending on the size, overtorque due to inertia cannot be avoided.

■ It is not possible to commercialize torque-sensitive rotary tools using forging technology equipment.

In order to solve all of the above problems, the present invention has the following features: (1) The main body is made of an integral forged product, and no blades are used.

The mouth and torque sensitive devices are all exposed to the outside.

C. As a means of conveying the set torque to the operator, it is recognized visually rather than by the feel of the hand or by the regulation sound.

The present invention has been completed focusing on the three points A, C, and C.

[Means to solve the problem]

The details are as follows with reference to the accompanying drawings.

A neck 11) 1i4 connected to the main body part 5 is connected with the tip of a rotational grip 1, and a reciprocating arm 2 whose tip protrudes laterally is rotated on this rotational grip 1. 2° of the proximal side surface of the reciprocating arm 2 is brought into contact with the distal end surface 4° of the neck handle 4, and a spring protruding from the tip of the reciprocating arm 2 and the side of the rotating grip handle 1 is attached. It is characterized in that a carded cotton thread 3 is provided between the receiving part 13 and the receiving part 13.

[For production]

In FIG. 1, when the grip handle 1 is gripped and rotated in the direction of the arrow, the grip handle 1 and neck handle 4 are activated integrally via a sensing device a consisting of a reciprocating arm 2 and a carding spring 3. Therefore, in the case of the drawing of the main body part 5, the wrench barrel 6 tightens the nut 7 held inside the wrench barrel 6.

When the nut 7 is tightened to the point where it is no longer necessary to tighten it any further, a torque-sensitive rotary tool is able to sense the regulated torque, but in the case of the present invention, the rotational force exceeds the regulated torque. When the force is applied, the tip of the reciprocating arm 2 will contract the carding spring 3 in the direction of the arrow and move backward, and when the tip of the reciprocating arm 2 moves to a predetermined position as shown in FIG. When the inner surface 2° of the tip of the movable arm 2 becomes approximately perpendicular to the grip handle 1 (positioned on the Y imaginary line), the rotation is stopped as the regulation torque is reached. In this case, the resistance of the carding spring 3 is adjusted in advance so that the regulating torque is reached when the inner surface 2° of the tip of the reciprocating arm 2 becomes approximately perpendicular to the handle l.

In this way, it is confirmed that the regulated torque has been reached visually by the movement of the reciprocating arm 2, but a stopper 8 is provided to prevent excessive torque from being applied to the sensitive part, and the resistance of the carding spring 3 is By providing an adjustment device 9 that can adjust the amount, the magnitude of the regulating torque can be adjusted.

〔Example〕

It is preferable that the proximal side surface 2' of the reciprocating arm 2 and the distal end surface 4° of the neck handle 4 be in a meshing state, and the drawings show a case where they are designed in a gear meshing state.

In addition, the base of the reciprocating arm 2 is pivoted by installing a pivot plate 10 protruding below the grip handle 1 in a vertically opposed manner, and inserting the reciprocating arm 2 therein and attaching it by the shaft 11. is illustrated.

Fukudo 1i again! A spring receiver P is attached to the tip of the spring receiver 2 with a shaft 11', and a spring receiver 12° is screwed to the spring receiver 13 on the opposite side so that it can be adjusted forward and backward. 3 is shown in the figure.

In the figure, numeral 14 is a set screw, 15 is a stopper clearance, 16 is a stop washer, 17 is a part of the cover, and 17 is a part of the bolt.

FIG. 6 shows a case where the present invention is applied to a spanner, and in the figure, reference numeral 19 is a pivot joint, and numeral 6 is a pivot shaft.The scope of application of the present invention is not limited to the embodiment. Of course, this also applies to ratchet wrenches, pipe wrenches, etc.

〔Effect of the invention〕

Since the present invention is configured as described above, it exhibits the following practicality.

■ The grip handle is not a pipe structure, but can be called an integral type, and the structural design of the end part can be freely designed, for example, it is possible to form an integral sinew.

■ Conventional products could only be used for tightening screws due to their torque-sensitive structure, but the product of the present invention does not change the torque sensitivity value even when used for loosening screws, making it a basic wrench. Don't limit functionality.

■ Since it is not made of pipe, there is no need to worry about deformation if used roughly, and it is durable enough to be used as a regular forged tool.

■ Since there is a large degree of freedom in the installation space of the sensing device a, the parts can be made larger accordingly, and there is little deterioration in accuracy.

■ Since the adjustment device is partially exposed, even if mud, pebbles, or sand gets in it, it can be easily washed off with water, and since the details can be visually confirmed, repairs are easy and maintenance can be performed by the user.

■ Since it is visually recognized that the regulated torque has been reached, there are no individual differences in the recognition, it is easy to stop work at the regulated value point, and over-torque tightening can be avoided.

■ Single production is possible with the technical know-how of the forging manufacturer.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a front view of the present invention, FIG. 2 is a partially cutaway side view, and FIG. 3 is a side view of the present invention.
- A sectional view taken along line A, Figure 4 is a sectional view taken along line B-B, Figure 5 is a partially cutaway front view of the state in which the regulated torque has been reached, and Figure 6 is a sectional view taken along line A.
The figure is a front view of a part of the spanner. 1...grip handle, 2...reciprocating arm, 2°...base side,
3 ・Wolding yarn, 4... Neck pattern, 4'... End surface, 5
... Main body part, 13... Spring receiving part.

Claims (1)

[Claims] The tip of a rotating grip handle is connected to the neck handle that is connected to the main body, and a reciprocating arm whose tip projects laterally is rotatably attached to the rotating grip handle. The proximal side surface of this reciprocating arm is brought into contact with the distal end surface of the neck handle, and an anti-squeezing strip is provided between the tip of the reciprocating arm and the spring receiving part protruding from the side of the rotating grip handle. A torque-sensitive rotary tool with special features.