JP3177276U - 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 formed in a rear surface 3a of an adjusting ring 3 for setting a tightening torque. The screw 5 is screwed into the screw hole 3b from the rear surface 3a side of the adjustment ring 3, and the hole 6 into which the distal end portion 5b of the screw 5 is inserted is formed on the end surface of the base end 1a of the wrench main body 1 and the shaft center of the wrench main body 1. A plurality of them are formed at equal intervals on a circumference centered at. After adjusting the tightening torque into the hole 6, the tip 5b of the screw 5 is inserted to prevent the adjustment ring 3 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 4 is a preset type torque wrench provided on the rear surface 3a side of the adjustment ring 3, and a screw hole 3b is formed in the rear surface 3a of the adjustment ring 3, and the adjustment ring 3 is provided in the screw hole 3b. A screw 6 is screwed from the side of the rear surface 3a, and a hole 6 into which a distal end portion 5b of the screw 5 is inserted is a circle centering on the axis of the wrench main body 1 at the end surface of the base end 1a of the wrench main body 1 described above. Duplicate at regular intervals on the circumference Is formed, in the hole 6, after adjusting 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).

  In the case of the present invention, the screw 5 preferably has a hexagonal hole 5c, a square hole or the like formed in the head 5a, but is not limited thereto, and the type thereof is arbitrary. The hole 6 may be bottomed or penetrating. The screw hole 3b is preferably formed in a shape that can accommodate the head 5a of the screw 5 in accordance with the shape of the screw 5.

Further, according to the present invention, a blindfold plate 8 for shielding the head 5a of the screw 5 and preventing the screw 5 from being pulled out is arranged between the lock screw 4 and the adjusting ring 3 so that the axis of the wrench body 1 is located. It is preferable that an opening 8a for rotating the screw 5 via the blindfold plate 8 is formed at the position of the blindfold plate 8 that is rotatably provided at the center and that corresponds to the head portion 5a of the screw 5. (Claim 2).
This is because the screw 5 can be operated via the opening 8a of the blindfold plate 8, and the head 5a of the screw 5 is normally hidden to prevent the screw 5 from being turned by mischief.

Further, in the present invention, a pin 9 for preventing the lock screw 4 from falling off is inserted into the rear surface 3a of the adjusting ring 3 through a through hole 8b formed in the blindfold plate 8, and this pin 9 is passed through. A plurality of through holes 8b are preferably formed in an arc shape on the same circumference around the center of the blindfold plate 8 corresponding to the axis of the wrench body 1 (Claim 3).
This is because according to this, the through-hole 8b has an arc shape, so that when the blindfold plate 8 is turned, the blindfold plate 8 is guided by the pin 9 and the head 5a of the screw 5 can be hidden. Further, in this case, since the plurality of through holes 8b are formed, it is easy to adjust the insertion position of the pin 9 in accordance with the turning angle of the lock screw 4.

In this case, in the present invention, it is preferable that the opening 8a for rotating the screw 5 via the blindfold plate 8 is formed on the same circumference as the through hole 8b (Claim 4).
This is because according to this, positioning of the screw hole 3b and the small hole 10 for inserting the pin 9 becomes easy.

  In the present invention, a screw hole is formed in the rear surface of the adjustment ring in this way, a screw is screwed into the screw hole from the rear surface side of the adjustment ring, and a hole into which the tip portion of the screw is inserted is formed in the wrench body. A plurality of equidistant holes are formed on the end face of the base end on the circumference centered on the axis of the wrench body. After adjusting the tightening torque, the tip of the screw is inserted into this hole to adjust the ring. Is formed so as to be able to prevent rotation.

  Therefore, according to the present invention, even if the lock screw 4 is loosened, the adjustment ring rotates and the tightening torque value is changed, or even if an on-site worker mischief the adjustment ring, the tightening torque value can be easily changed. It has an excellent practical effect that it cannot be performed.

It is a principal part disassembled perspective view of this invention product. It is a side view of this invention product. It is a front view of the base end part of a wrench body. It is a front view of a blindfold board. 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 screw, and B is a front view. It is sectional drawing of the screw and wrench in the VIII-VIII line of FIG. 7B. A is a perspective view of a screw, and B is a perspective view with a part of a wrench cut away. It is the front view seen from the rear surface side of the adjustment ring before rotation of a blindfold board. It is the front view seen from the rear surface side of the adjustment ring after rotation of a blindfold board.

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 adjustment 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 setting the tightening torque by rotating the adjustment screw 2 is provided at the base end 1 a of the wrench body 1. In the present invention, a lock screw 4 for fixing the adjustment ring 3 to the base end portion 1 a of the wrench body 1 is provided on the rear surface 3 a side of the adjustment ring 3. The lock screw 4 is provided on the rear surface 3 a side of the adjustment ring 3 such that the female screw 4 a is screwed into the male screw 2 a at the end of the adjustment screw 2.

  Further, according to the present invention, one screw hole 3b is formed in the adjusting ring 3 in this embodiment in a penetrating manner along the axis of the adjusting ring 3. The screw 5 is screwed into the screw hole 3b from the rear surface 3a side of the adjustment ring 3.

  As shown in FIGS. 1 and 7 to 9, the screw 5 is formed with a tip portion 5 b whose diameter is smaller than that of a male screw-shaped shaft portion on the opposite side of the head portion 5 a. A hexagonal hole 5c is formed in the head 5a of the screw 5, and a projection 5d is formed at the axial center position of the screw 5 in the hexagonal hole 5c.

11 (see FIGS. 8 and 9) is a wrench for rotating the screw 5. The wrench 11 is formed with a concave hole 11a into which the projection 5d enters at an end to be fitted into the hexagonal hole 5c.
The tip portion 5b of the screw 5 is formed to have a length of about 2 mm, and the tip portion 5b has no thread.

  In addition, as shown in FIGS. 1 and 3, in the present invention, the hole 6 into which the distal end portion 5 b of the screw 5 is inserted has an axial center of the wrench body 1 on the end face of the base end portion 1 a of the wrench body 1. A plurality are formed at equal intervals on the circumference of the center. In this embodiment, the holes 6 are formed in a bottomed shape, and a total of ten holes 6 are formed corresponding to the torque setting scale 7 (see FIG. 5). In the present invention, the adjustment ring 3 is prevented from rotating by allowing the tip 5b of the screw 5 to enter the hole 6 after adjusting the tightening torque.

  In addition, as shown in FIGS. 1, 4, etc., the present invention shields the head 5 a of the screw 5 and prevents the screw 5 from being pulled out. The blindfold plate 8 includes the lock screw 4 and the adjustment ring 3. Are provided so as to be rotatable around the axis of the wrench body 1. The blindfold plate 8 is formed in a disc shape, and a round hole 81 is fitted in and inserted into the male screw 2a at the end of the adjusting screw 2 protruding from the rear surface 3a of the adjusting ring 3, and can be rotated around the male screw 2a. Is provided. In the blindfold plate 8, an opening 8a for rotating the screw 5 is formed in a Dalma hole shape in this embodiment at a position corresponding to the head 5a of the screw 5.

  Further, according to the present invention, a pin 9 for preventing the lock screw 4 from falling off is inserted into the rear surface 3 a of the adjustment ring 3 via the blindfold plate 8. The blindfold plate 8 is formed with a through hole 8b through which the pin 9 passes. Two through holes 8 b are formed in an arc shape on the same circumference around the center of the blindfold plate 8 corresponding to the axis of the wrench body 1. Moreover, this through-hole 8b and said opening part 8a are formed on the same periphery in this embodiment.

  The pin 9 is inserted into a small hole 10 formed at an appropriate position on the rear surface 3 a of the adjustment ring 3. As shown in FIG. 1, FIG. 5, etc., the lock screw 4 is formed with a notch 4b on one side of its axis, and when rotated, the lock screw 4 rotates through a notch 4b by a predetermined angle, The side surface 4 c is formed so as to be engaged with the protruding end of the pin 9. As a result, the lock screw 4 can be turned only slightly when the blindfold plate 8 is loosened to prevent the lock screw 4 from falling off.

  Next, the operation of the inventive device will be described.

  First, when the operator turns the adjustment ring 3 to set the torque, the screw 5 is screwed into the adjustment ring 3 through the opening 8 a of the blindfold plate 8, and the tip portion 5 b enters the hole 6. Thereby, the adjustment ring 3 is prevented from rotating and is fixed.

  Next, the operator inserts the pin 9 into the small hole 10 through the through hole 8 b of the blindfold plate 8. And the blindfold board 8 is turned a little and the opening part 8a is shifted, and the head 5a of the screw 5 is hidden. In this case, since the through-hole 8 b has an arc shape, the blindfold plate 8 rotates without being stopped by the pin 9. Then, the operator screws the lock screw 4 into the male screw 2 a at the end of the adjustment screw 2, and fixes the blindfold plate 8 to the rear surface 3 a of the adjustment ring 3.

  Thereby, even if the lock screw 4 is loosened in the present invention, the adjustment ring 3 is fixed and the loosening is prevented. Further, according to the present invention, the head 5a of the screw 5 is hidden by the blindfold plate 8 so that it cannot be touched.

  When changing the tightening torque value, the operator first loosens the lock screw 4 and then shifts the blindfold plate 8 to expose the head 5a of the screw 5 from the opening 8a. Next, the operator loosens the screw 5 through the opening 8 a and removes the tip portion 5 b from the hole 6. As a result, the adjustment ring 3 can be rotated, and the tightening torque value can be changed.

DESCRIPTION OF SYMBOLS 1 Wrench main body 1a Base end part 2 Adjustment screw 3 Adjustment ring 3a Rear surface 3b Screw hole 4 Lock screw 5 Screw 5b Tip part 6 Hole

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 formed in the rear surface, a screw is screwed into the screw hole from the rear surface side of the adjustment ring, and a hole into which the tip end portion of the screw is inserted is formed on the end surface of the wrench main body at the end surface of the wrench main body. A plurality of holes are formed at equal intervals on the circumference centered on the shaft center. After adjusting the tightening torque, the tip of the screw is inserted into this hole to prevent the adjustment ring from rotating. With features Preset type torque wrench that.   2. The preset type torque wrench according to claim 1, wherein a blindfold plate for shielding the screw head and preventing the screw from being detached is disposed between the lock screw and the adjustment ring. And is provided with an opening for rotating the screw through the blindfold at the position of the blindfold corresponding to the head of the screw. A wrench.   3. The preset type torque wrench according to claim 2, wherein a pin for preventing the lock screw from falling off is inserted into the rear surface of the adjustment ring through a through hole formed in the blindfold plate, and this pin is passed through. The preset type torque wrench is characterized in that a plurality of through-holes are formed in an arc shape on the same circumference around the center of the blindfold plate corresponding to the axis of the wrench body.   4. The preset type torque wrench according to claim 3, wherein an opening for rotating the screw via a blindfold is formed on the same circumference as the through hole. .

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