JP3150005U - Preset torque wrench - Google Patents

Abstract

[PROBLEMS] Even if a lock screw is loosened, the adjustment ring rotates and the set tightening torque value changes, or even if a worker on the site mischief the adjustment ring, the adjustment ring cannot be easily turned. A preset torque wrench is provided. A screw hole (3b) is opened in a rear surface (3a) of an adjustment ring (3). The screw 5 is screwed into the screw hole 3b from the rear surface 3a side of the adjustment ring 3. A locking recess 6 through which the distal end portion 5 b of the screw 5 enters and exits is formed in the pipe end 1 b of the base end portion 1 a of the wrench body 1. After adjusting the tightening torque, the front end portion 5b of the screw 5 is inserted into the locking recess 6 so that the adjustment ring 3 can be prevented from rotating. [Selection] Figure 1

Description

  The present invention relates to a torque wrench, and more particularly, to a preset type torque wrench configured to release torque when a set tightening torque value is reached.

Conventionally, as this type of torque wrench, for example, the one described in Patent Document 1 is known.
This conventional product includes an adjustment screw for setting a tightening torque at the axial center of the pipe-shaped wrench body, and an adjustment ring for rotating the adjustment screw to set a torque value is provided at the base end of the wrench body. A lock screw (lock screw) for fixing the adjustment ring to the rear end of the wrench body is provided on the rear surface side of the adjustment ring.

  By the way, in this type of wrench, the lock screw may come into contact with a surrounding workpiece or the like during operation to loosen it. In addition, since the operator grips and operates the portion from the base end portion of the wrench body, it is inevitable that the hand touches the adjustment ring. For this reason, with this type of wrench, the tightening torque value may change due to the adjustment ring turning without the operator's knowledge.

Also, depending on the worker on site, the adjustment torque may be turned without permission and the tightening torque value may be mischievously changed.
Therefore, this type of wrench is designed so that the initial tightening torque value that has been set does not change even if the lock screw is loosened, and that the adjustment ring cannot be turned easily even if the operator is mischievous. desirable.

JP 2000-202780 A

The present invention has been proposed in view of such problems of conventional products.
Therefore, the technical problem to be solved by the present invention is that even when the lock screw is loosened, the adjustment ring rotates and the set tightening torque value is changed, or the operator in the field mischief the adjustment ring. It is an object of the present invention to provide a preset type torque wrench formed so that the adjustment ring cannot be turned easily.

The present invention adopts the following technical means in order to solve the above problems.
That is, in the torque wrench of the present invention, as shown in FIG. 1 and the like, an adjusting screw 2 for setting a tightening torque is provided along the axis of the wrench body 1 at the axial center position of the pipe-shaped wrench body 1. An adjustment ring 3 for rotating the adjustment screw 2 to set a tightening torque is provided at the base end 1a of the wrench body 1, and this adjustment ring 3 is fixed to the base end 1a of the wrench body 1. The lock screw 7 is a preset type torque wrench provided on the rear surface 3a side of the adjustment ring 3. A screw hole 3b is opened on the rear surface 3a of the adjustment ring 3, and the adjustment ring 3 is inserted into the screw hole 3b. A screw 5 is screwed in from the rear surface 3a side, and a locking recess 6 into which the tip portion 5b of the screw 5 enters and exits is formed in the pipe end 1b of the base end 1a of the wrench body 1, and the locking recess 6 Adjust the tightening torque Characterized in that the rotation of the adjusting ring 3 by invading the tip portion 5b of the screw 5 is prevented it can be formed (claim 1).

  Here, the screw 5 includes a bolt. In the case of the present invention, the screw 5 preferably has a hexagonal hole, a square hole or the like formed in the head 5c, but is not limited thereto, and the type thereof is arbitrary. Further, the screw 5 may be omitted from the screw 5 by a predetermined length (for example, about 2 mm) on the side of the tip portion 5b inserted into the locking recess 6. The screw hole 3b is preferably formed in a shape that can be accommodated up to the head 5c of the screw 5 in accordance with the shape of the screw 5. Moreover, the latching recessed part 6 is implement | achieved by forming in a notch shape, a hole shape, or a groove shape, for example.

Further, according to the present invention, the locking recess 6 extends in the circumferential direction of the pipe end 1b in correspondence with the torque setting scale 4 in which the outer surface on the front side of the adjustment ring 3 is annularly provided around the axis of the adjustment ring 3. It is preferable that a plurality of screw holes 3b are formed at equal intervals, and one screw hole 3b is formed corresponding to the torque setting scale 4 (Claim 2).
Because, according to this, when the adjustment ring 3 is rotated on the scale 4 by fitting the torque setting scale 4 and the locking recess 6 to the base end 1a of the wrench body 1, This is because the screw hole 3 b is disposed at the position of the scale 4 and the alignment between the screw hole 3 b and the locking recess 6 can be facilitated. Further, according to this, since there is a single screw hole 3b, it is easy to form the screw hole 3b and the processing cost can be reduced accordingly.

Further, the present invention is formed with a blindfold plate 8 that is pressed against the rear surface 3a of the adjustment ring 3 by the lock screw 7 to shield the head 5c of the screw 5 and prevent the screw 5 from being pulled out. (Claim 3).
This is because according to this, since the screw 5 can be concealed, mischief of the screw 5 can be prevented, and the screw 5 can be prevented from falling off.

Further, in this case, according to the present invention, the blindfold plate 8 is passed through the shaft 7a of the lock screw 7 so as to be rotatable about the shaft 7a, and at the position corresponding to the head 5c of the screw 5, the blindfold plate 8 is provided. It is preferable that an opening 8a for rotating the screw 5 is formed through the screw (claim 4).
This is because the screw 5 can be concealed, and the screw 5 can be easily and quickly tightened and loosened by turning the blindfold plate 8 as necessary to align the opening 8a with the head 5c of the screw 5. Because it can.

In the present invention, the screw hole is thus opened on the rear surface of the adjustment ring, the screw is screwed into the screw hole from the rear surface side of the adjustment ring, and the locking recess into which the tip portion of the screw enters and leaves is the base of the wrench body. It is formed at the pipe end of the end portion, and after adjusting the tightening torque, the tip end portion of the screw is inserted into the locking recess so as to prevent the adjustment ring from rotating.
Therefore, according to the present invention, even if the lock screw is loosened, the adjustment ring rotates and the tightening torque value is changed, or even if a worker on the site mischief the adjustment ring, the tightening torque value is easily changed. There is an excellent practical effect that it is impossible.

It is a principal part disassembled perspective view of this invention product. It is a principal part disassembled side view of this invention product. It is a principal part longitudinal cross-sectional view of this invention product. A is a side view of the main part of the product of the present invention, and B is a right side view of A. A is a plan view of the adjustment ring, and B is a bottom view of A. FIG. A is a side view of the blindfold, and B is a right side view of A. FIG. It is a top view of this invention product. It is a side view of this invention product.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
In the product of the present invention, an adjusting screw 2 for setting a tightening torque is provided along the axis of the wrench body 1 at the axial center position of the pipe-shaped wrench body 1.

  Reference numeral 3 denotes an adjustment ring for setting the tightening torque by rotating the adjustment screw 2. The adjustment ring 3 is provided at the base end 1 a of the wrench body 1. Further, in the present invention product, a screw hole 3 b is opened on the rear surface 3 a of the adjustment ring 3. One screw hole 3b is formed around the axis of the adjustment ring 3 at a position facing the pipe end 1b of the wrench body 1 in this embodiment. Further, in this embodiment, the screw hole 3b corresponds to a torque setting scale 4 (see FIG. 2, FIG. 5A, etc.) provided on the outer surface of the adjustment ring 3 in an annular shape around the axis of the adjustment ring 3. The scale 4 is formed at the position “0”.

  Reference numeral 5 denotes a screw that is screwed into the screw hole 3b from the rear surface 3a side of the adjustment ring 3. The screw 5 is formed by a shaft portion 5a having a thread and a tip portion 5b having a diameter reduced from that of the shaft portion 5a. The head 5c of the screw 5 is provided with a hexagonal hole for screwing operation, the tip portion 5b is formed to be about 2 mm, and the screw thread is omitted from the tip portion 5b.

  Further, in the product of the present invention, a locking recess 6 through which the distal end portion 5b of the screw 5 enters and exits is formed in the pipe end 1b of the base end portion 1a of the wrench body 1 described above. In the product of the present invention, the adjustment ring 3 is prevented from rotating by allowing the tip 5b of the screw 5 to enter the locking recess 6 after adjusting the tightening torque. In this embodiment, the locking recess 6 is formed in a notch shape, and a plurality of the locking recesses 6 are formed at equal intervals along the circumferential direction of the pipe end 1 b corresponding to the torque setting scale 4.

  Reference numeral 7 denotes a lock screw for fixing the adjustment ring 3 to the base end 1 a of the wrench body 1. The lock screw 7 is formed so that the shaft 7 a can be screwed into the end 2 a of the adjustment screw 2, and is provided on the rear surface 3 a side of the adjustment ring 3.

  The product of the present embodiment of this embodiment also includes a blindfold plate 8 that is pressed against the rear surface 3a of the adjusting ring 3 by the lock screw 7 to shield the head 5c of the screw 5 and prevent the screw 5 from being pulled out. Is formed. The blind plate 8 is formed in a ring shape that is passed through the shaft 7a of the lock screw 7 and is rotatable about the shaft 7a. The blindfold plate 8 is formed with an opening 8 a for rotating the screw 5 via the blindfold plate 8 at a position corresponding to the head 5 c of the screw 5. In the present embodiment, a total of four openings 8a are formed in a cutout shape every 90 degrees in this embodiment.

Next, the operation of the inventive device will be described.
The adjustment ring 3 is fixed by the operator screwing the screw 5 and allowing the tip portion 5 b to enter the locking recess 6. In this case, in this embodiment, the blindfold plate 8 is turned slightly to align the opening 8a with the head 5c of the screw 5, and a screw or other tool is inserted through the opening 8a to tighten the screw 5. When the screw 5 is screwed in, the tip portion 5b enters the locking recess 6 and the adjustment ring 3 is prevented from rotating. After the screw 5 is tightened, the blindfold plate 8 is turned slightly to displace the opening 8a, the head 5c of the screw 5 is concealed, the lock screw 7 is screwed in, and the blindfold plate 8 is attached to the rear surface 3a of the adjustment ring 3. Fix it.
The tightening torque value can be changed by operating in the reverse direction to the above example, loosening the screw 5 and extracting the tip portion 5b from the locking recess 6.

DESCRIPTION OF SYMBOLS 1 Wrench main body 1a Base end part 1b Pipe end 2 Adjustment screw 3 Adjustment ring 3a Rear surface 3b Screw hole 5 Screw 5b Tip part 6 Locking recessed part 7 Lock screw

Claims (4)

  An adjusting screw for setting the tightening torque is provided along the axis of the wrench main body at the axial center position of the pipe-shaped wrench body, and an adjusting ring for rotating the adjusting screw to set the tightening torque is a wrench. A preset type torque wrench provided at the base end of the main body, and a lock screw for fixing the adjustment ring to the base end of the wrench main body is provided on the rear surface side of the adjustment ring. A screw hole is opened on the rear surface, a screw is screwed into the screw hole from the rear surface side of the adjustment ring, and a locking recess into which the distal end portion of the screw enters and exits is formed in the pipe end at the base end portion of the wrench body. The preset type torque wrench is formed so that the adjustment ring can be prevented from rotating by allowing the tip of the screw to enter the locking recess and then adjusting the tightening torque.   2. The preset type torque wrench according to claim 1, wherein the locking recess is formed on the outer surface of the front side of the adjustment ring so as to correspond to a torque setting scale that is annularly provided around the axis of the adjustment ring. A preset type torque wrench, wherein a plurality of screw holes are formed at equal intervals in the circumferential direction, and one screw hole is formed corresponding to a torque setting scale.   3. The preset type torque wrench according to claim 1, wherein the preset type torque wrench is provided with a blindfold plate that is pressed against the rear surface of the adjustment ring by a lock screw to shield the head of the screw and prevent the screw from being pulled out. Preset type torque wrench characterized by   The preset type torque wrench according to claim 3, wherein the blindfold plate is formed to be rotatable about the shaft through the shaft of the lock screw, and the blindfold plate is provided at a position corresponding to the head of the screw. A preset type torque wrench, wherein an opening for rotating the screw is formed.

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