JPH074126Y2 - Preset type torque wrench - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Use of the Invention] The present invention relates to a preset torque wrench having a main scale and a sub-scale for torque setting.

[Background of the Invention] The structure of a conventional preset type torque wrench of this type is, for example, as shown in FIG. An annular thrust ring 4 is screwed inside the tail end portion of a pipe-shaped torque wrench lever 3 connected to a torque wrench head 1 via a support shaft 2.
It is fixed integrally with the torque wrench lever 3 by screwing the taper screw 5. Reference numeral 6 denotes an annular slider fitted in the torque wrench lever 3 so as to be movable only in the thrust direction. A torque adjusting screw 7 is attached to a screw 6 ′ formed in a central hole of the slider 6.
Are meshed. A flange 8 is formed on the adjusting screw 7, and the flange 8 is in contact with the inner side surface of the thrust ring 4 so that the adjusting screw 7 is regulated so as not to be pushed outward. . Reference numeral 9 denotes a spring that elastically presses a torque adjusting mechanism such as a toggle.
The rear end is received by the slider 6. Reference numeral 10 is a guide that regulates the slider 6 so that it can move only in the thrust direction, that is, it does not rotate in the circumferential direction, and 11 is a torque adjustment scale that is provided in the generatrix direction of the circumferential surface of the slider 6. This is a window for reading. 12 is a knob attached to the tail end of the adjusting screw 7.
By turning 12, the adjusting screw 7 is rotated, the slider 6 moves in the thrust direction, and as a result, the elastic force of the spring 9 changes, and the set torque of the torque wrench can be adjusted. Reference numeral 13 denotes a flange which is provided corresponding to the knob 12 and is integral with the torque wrench lever 3, and a knob contact surface of the flange 13 has a sub scale (indicated by a scale) for displaying a rotating position of the knob 12. (Not shown) is applied.

As described above, in the conventional preset type torque wrench, the slider 6 is moved in the thrust direction and the elastic force of the spring 9 is adjusted by rotating the knob 12 while pinching the knob 12, thereby setting the torque wrench. Although the torque can be adjusted, the knob 12 is the torque wrench lever 3
When the preset torque wrench is used, the knob 12
There is a problem that the set torque value goes wrong due to the fact that the worker touches an operator or other object to rotate.

[Object of the Invention] The present invention has been made in order to solve the above-mentioned conventional problems. The adjustment unit for setting the torque is configured so as not to be projected to the outside of the torque wrench lever, and the conventional problems are solved. An object of the present invention is to provide a preset type torque wrench that can be used.

[Embodiment of the Invention] The present invention will be described in detail below with reference to an embodiment shown in FIGS.

Reference numeral 21 denotes a torque wrench lever of a preset type torque wrench, and an annular thrust ring 22 is screwed inside the tail end portion of the torque wrench lever 21. According to the combination, the torque wrench lever 3 is integrally fixed. Reference numeral 24 denotes an annular slider fitted in the torque wrench lever 21 so as to be movable only in the thrust direction.A female screw 25 formed in the center hole of the slider 24 is engaged with a torque value adjusting screw 26. There is. A collar 27 is formed on the adjusting screw 26, and the collar 27 is abutted against the inner side surface of the thrust ring 22 and is regulated so that the adjusting screw 26 is not pushed outward. . Reference numeral 28 denotes a spring that elastically presses a torque adjusting mechanism such as a toggle (not shown), and the rear end of this spring 29 is received by the slider 24. Reference numeral 29 is a guide that regulates the slider 24 so that it moves only in the thrust direction, that is, it does not rotate in the circumferential direction.
29 is fixed integrally with the torque wrench lever 21 by a mounting screw 30. Reference numeral 31 is a window for reading the main torque adjustment scale provided in the busbar direction on the peripheral surface of the slider 24. Reference numeral 32 denotes a ball interposed on the joint surface between the collar 27 and the thrust ring 22. By the ball 32, a sense of moderation at the time of adjusting the rotation of the adjusting screw 26 can be obtained. . 33 is on the outer end surface of the thrust ring 22,
The scale plate is integrally attached to the thrust ring 22 via the locking claws 34, and a sub scale 35 is provided in the surface circumferential direction of the scale plate as shown in FIG. Reference numeral 36 denotes a shield plate fitted and fixed to the serration 36 'formed on the tail end portion 26' of the adjusting screw 26, and the shield plate 36 hides the sub scale 35 applied to the scale plate 33. But
A sub-scale reading window 37 is provided in a part of the shielding plate 36, and any one of the sub-scales 35 can be read from this window 37. Reference numeral 38 denotes a handle made of, for example, rubber that is attached to the outside of the tail end portion of the torque wrench lever 21, and this handle has a window 39 that does not close the window 31.
The tail end portion 26 'of the adjusting screw 26 is projected to form a protection portion 38' for preventing contact with other objects.

The above is the configuration of the present embodiment. To describe the operation next, adjustment of the tightening torque with this torque wrench is as follows.
By rotating the adjusting screw 26, the slider 24 moves in the thrust direction, and the elastic force of the spring 28 changes, whereby the set torque value of the torque wrench can be adjusted. The tail end portion 26 'is a protection portion of the handle 38.
Because it is hidden in 38 ', it is not possible to directly grasp this tail end 26' and rotate the adjusting screw 26. Therefore,
In order to rotate the adjusting screw 26, as shown in FIG. 1, a tool 40 fitted to the serration of the tail end portion 26 'thereof is provided.
The adjustment screw 26 described above can be easily rotated by using, and the auxiliary scale and slider located in the window 37
It is possible to adjust to an appropriate set torque value while looking at the main scale on the 24th circumferential surface.

Therefore, according to this embodiment, the adjusting portion of the adjusting screw 26, that is, the tail end portion 26 'is located inside the handle 38 so as not to come into contact with other objects. In addition, there is an effect that it is possible to obviate the problem that the preset torque value is changed due to contact with another object.

[Outline of the Invention] As described above, in the present invention, the adjusting screw 26 for setting the tightening torque is provided inside the tail end of the torque wrench lever 21,
In the preset torque wrench having the slider 24 with the main scale that moves in the axial direction by the turning operation of the setting screw 26, in order to turn the adjusting screw 26 at the tail end of the torque wrench lever 21. A tail end portion 26 'is formed so as to project, and a shield plate 36 having a sub scale display window 37 is fixed to the tail end portion 26'. A sub-scale plate 33 is provided to be superposed on the inside of the plate 36, and the shield plate 36, the sub-scale plate 33 and the tail end portion 26 'do not protrude beyond the rear end of the torque wrench lever 21 and the tail end of the torque wrench lever 21 A preset type torque wrench characterized in that it is protected by a protection portion 38 'formed at the tail end of a handle 38 attached to the outside of the portion.

[Advantage of Invention] Therefore, according to this preset type torque wrench, the tail end portion 26 ', which is the adjusting portion of the adjusting screw 26, is positioned in the protecting portion 38' of the handle 38 and is protected from contact with other objects. Therefore, the tail end portion 26 'of the adjusting screw 26 suddenly comes into contact with another object and the preset torque value is deviated, or the scale plate
33, there is an effect that problems such as the shield plate 36 coming into contact with other objects and being damaged can be solved in advance.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the whole of a preset type torque wrench according to the present invention, FIG. 2 is an enlarged sectional view of the container portion, and FIG.
FIG. 4 is an end view thereof, and FIG. 4 is an explanatory view showing a conventional preset type torque wrench. 21 …… Torque wrench lever, 22 …… Thrust ring 23 …… Tapered screw, 24 …… Slider 25 …… Female thread, 26 …… Adjustment screw 27 …… Ball, 28 …… Spring 29 …… Guide, 30 …… Mounting Screw 31 …… Window, 32 …… Ball 33 …… Scale plate, 34 …… Locking pawl 35 …… Sub scale, 36 …… Shield plate 37 …… Window, 38 …… Handle 38 ′ …… Protection part, 39 ……window

Claims (1)

[Scope of utility model registration request] 1. A torque wrench lever (21) inside the tail end,
A preset type torque wrench provided with an adjusting screw (26) for setting the tightening torque, and having a slider (24) with a main scale that moves in the axial direction by rotating the adjusting screw (26), Torque wrench lever (21) above
A tail end portion (26 ') formed to rotate the adjusting screw (26) is provided at the tail end of the so as to project a sub scale display window (37) at the tail end portion (26'). Fix the shield plate (36) that has, and at the tail end of the torque wrench lever (21),
A sub scale plate (33) is provided which is superposed on the inside of the shield plate (36), and the shield plate (36), the sub scale plate (33) and the tail end portion (26 ') are arranged from the rear end of the torque wrench lever. A preset type torque wrench, which is protected by a protection portion (38 ') formed on the tail end of the handle (38) attached to the outside of the tail end of the torque wrench lever (21) so as not to project.