KR101529207B1 - Air Torque Wrench - Google Patents

Abstract

The present invention provides an air torque wrench having effects of ensuring safety when working in a high place and resolving the difficulty of bolting work at the same time by preventing a phenomenon that a wrench body is rotated by a reaction force that occurs when bolting work; improving the convenience of a user by maintaining a stable position of the user by rotating the angle of offset to a location convenient for working as the offset can be rotated at a predetermined angle with respect to a wrench body to correspond to a shape of a bolting object, a bolting location, or a working space, or the like. According to the present invention, the air torque wrench including a wrench body and offset connected through a connection part with the front end of the wrench body, and having a box for bolting work comprises: a reaction force support bracket installed in the offset, and to support the offset by one end of a bolting object so as not to rotate the wrench body around the box while the box of the offset is inserted into a bolt or a nut of the bolting object and mounted; a bracket position adjustment mechanism to move the reaction force support bracket in the longitudinal direction of the offset with respect to the offset; and an offset rotation mechanism installed between the wrench body and the offset, and to rotate the offset around a vertical direction perpendicular to the longitudinal direction of the wrench body with respect to the offset.

Description

Air Torque Wrench [0002]

The present invention relates to an air torque wrench, and more particularly, to an air torque wrench capable of blocking a reaction force transmitted to an operator during a bolting operation and adjusting an offset (off-set) of the wrench body according to a shape of a bolt object to be bolted or a bolt position The present invention relates to an air torque wrench that can provide safety and convenience for an operator during a bolting operation.

In general, an air torque wrench is a representative tool for easily performing a bolting operation by using air pressure when tightening or unscrewing a bolt object with bolts and nuts in various industrial phenomena.

1 and 2, the conventional air torque wrench is provided with a wrench body 1 formed to be long in the longitudinal direction so as to be grasped by hand, and air pressure is applied to the rear end of the wrench body 1 And a rotary drive unit 3 having a rotor (not shown) rotated by a strong air pressure supplied from a compressor is provided at the tip of the wrench body 1, , And an offset (4) for performing a bolting operation using the rotational force of the rotor is provided at a lower portion of the rotation driving unit (3).

The offset 4 is provided with a box 4a mounted on a bolt or nut for bolting and a rotational force is transmitted from the rotation driving part 3 through the rotary shaft 3a to the inside of the offset 4, And a gear train 4b for transmitting the gear train 4a.

Therefore, when a strong air pressure is supplied from the compressor to the wrench body 1, the rotor in the rotation drive section 3 rotates, and the rotor rotates through the gear train 4b in the offset 4 and the rotation shaft 3a, So that it is possible to easily carry out the bolting operation without being forced by the air pressure.

However, in the air torque wrench of the above-described conventional configuration, as shown in Fig. 2, the box 4a of the offset 4 is inserted into the bolt or the nut B of the object A to perform the bolting operation A phenomenon occurs in which the wrench body 1 gripped by the reaction force generated when the wrench 1 rotates in the direction opposite to the bolt working direction occurs and the conventional air torque wrench does not have any means corresponding to this reaction force, There is a problem that is delivered to the worker as it is.

That is, when the bolt or nut B is tightened, a large reaction force is generated between the bolt 4a of the offset 4 to be rotated and the bolt or nut B to be rotated at the end of the tightening operation and the wrench body 1 is tightened When the bolt or nut B is unscrewed, a large reaction force is generated in the direction opposite to the direction of initially unwinding because the bolt and nut are tightened in the reverse direction, and the wrench body 1 also rotates There is a phenomenon.

Therefore, the operator must apply a large force to prevent the wrench body 1 from rotating in response to the reaction force. In addition to this, there is a difficulty in the work. In particular, when the worker is vigilant and can not cope with the reaction force, There is a concern about safety and there is an urgent need to improve its safety.

Since the wrench body 1 and the offset 4 are fixed in a straight line in the longitudinal direction of the wrench body 1 in the conventional air torque wrench, The posture of the worker gripping the worker 1 may become unstable. Such an unstable posture is a problem in that the work posture of the worker is not free at the time of high altitude work, which makes the bolting work more difficult and difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and it is an object of the present invention to provide a braking device for braking a braking operation by providing a reaction force supporting function capable of preventing a wrench body from rotating due to a reaction force And to provide an air torque wrench that can secure safety during high-altitude operation.

Further, the present invention provides an offset rotation function capable of rotating an offset by a predetermined angle with respect to a wrench body, so that an angle of an offset with respect to a wrench body corresponding to a shape of a bolt object, a bolting position, The present invention provides an air torque wrench that can maintain a stable posture of an operator at all times and can further improve the convenience of work during a high altitude operation in which the work posture is not free.

According to an aspect of the present invention, there is provided an air torque wrench including a wrench body and an offset connected to a distal end of a wrench body through a connection portion and having a box for a bolting operation, Further comprising a reaction force supporting bracket for supporting the offset at one end of the object to be bolted so that the wrench body can not rotate about the vox while being mounted on a bolt or nut of an object to be bolted, Feature.

Further, the present invention is characterized in that the air torque wrench further comprises a bracket position adjusting mechanism for moving the reaction force supporting bracket in the longitudinal direction of the offset with respect to the offset.

Further, the present invention is characterized in that the bracket position adjusting mechanism comprises a plurality of fixing grooves arranged in the direction of movement of the reaction force supporting bracket at offsets, a fixing position inserted into the fixing groove of the offset, A resilient member provided between the fixing pin and the reaction force supporting bracket to elastically apply a resilient force to the fixing pin so that the fixing pin is always inserted into the fixing groove; The air torque wrench is characterized by a guide groove formed in the moving direction of the reaction force supporting bracket and a guide protrusion formed on the reaction force supporting bracket and guided in the guide groove.

The air torque wrench further includes an offset rotation mechanism installed between the wrench body and the offset to rotate the offset relative to the wrench body about a vertical direction orthogonal to the longitudinal direction of the wrench body.

The present invention is characterized in that the offset rotation mechanism includes a first rotary member which is provided around a connection portion connecting the wrench body and the offset and is fixed to the connection portion side of the wrench body and has a serrated projection at the lower end thereof, Like projecting portion of the first rotary member is formed at the upper end thereof and is provided with a serrated protrusion portion which is fixed to the upper side of the first rotary member and which is engaged with the serrated- A cover member for moving the second rotary member between a coupling position where the tooth-like projection of the first rotary member and a tooth-like projection of the second rotary member are engaged with each other, Like projection of the second rotary member is always engaged with the serrated projection of the first rotary member so that the toothed projection of the second rotary member is always engaged with the serrated projection of the first rotary member Air torque wrench comprising an elastic member for imparting seongryeok is characterized.

According to the present invention having the above-described characteristic features, since the reaction force supporting bracket is provided at the offset, it is possible to prevent the wrench body from rotating due to the reaction force generated during the bolting operation and to prevent the reaction force from being transmitted to the worker as it is. It is possible to more smoothly perform the bolting work and to prevent the risk of the worker falling due to the reaction force in the case of the high altitude operation in which the work posture is unstable.

The present invention provides an offset rotation mechanism capable of rotating an offset with respect to a wrench body so that the angle of the offset can be adjusted so that an operator can take a stable working posture corresponding to the shape of the object to be bolted, Thus, the worker can work while maintaining a stable working posture, thereby further enhancing the convenience of the operator in the case of a complaint which is not free of motion.

1 is a perspective view showing a conventional air torque wrench;
2 is a side view showing a state of use of a conventional air torque wrench;
3 is a perspective view of an air torque wrench according to the present invention;
4 is a perspective view showing the reaction force supporting bracket and the bracket position adjusting mechanism of the air torque wrench according to the present invention separated.
5 and 6 are partially enlarged perspective views showing a bracket position adjusting mechanism of an air torque wrench according to the present invention.
7 is a side view showing a state of use of a reaction force supporting bracket of an air torque wrench according to the present invention.
8 is a plan view of a main part showing a use state of a reaction force supporting bracket of an air torque wrench according to the present invention.
9 is a partially cutaway perspective view showing an offset rotating mechanism of an air torque wrench according to the present invention.
10A and 10B are cross-sectional views of essential parts showing the operating state of the offset rotation mechanism of the air torque wrench according to the present invention.
11A and 11B are partially cut-away perspective views showing an operating state of the offset rotation mechanism of the air torque wrench according to the present invention.
12A to 12C are perspective views showing the use state of the offset rotation mechanism of the air torque wrench according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a perspective view showing an air torque wrench according to the present invention. The air torque wrench according to the present invention includes a wrench body 10, A known air torque wrench including an offset 20 provided with a box 21 for the offset 20 has a box 21 of the offset 20 mounted on a bolt or nut B of the object A A reaction force supporting bracket 30 for supporting the offset 20 at one end of the bolt object A to prevent the wrench body 10 from rotating about the vox 21 in the state of the wrench body 10 And an offset rotation mechanism for rotating the offset 20 about the wrench body 10 about a vertical direction orthogonal to the longitudinal direction of the wrench body 10 is provided around the connection portion 11 connecting the wrench body 10 and the offset 20, (40).

The reaction force supporting bracket 30 is installed at the offset 20 and includes a fixing portion 31 provided at the lower portion of the offset 20 as shown in FIGS. And a support portion 32 which is continuously provided in the vertical direction from the bolt A and is supported at one end of the bolt object A.

As shown in FIGS. 7 and 8, the support portion 32 of the reaction force support bracket 30 is mounted on a nut B (or a bolt head) for bolting by fitting a box 21 of an offset 20 The wrench body 10 is positioned in the longitudinal direction of the wrench body 10 so that one side thereof is brought into contact with or close to one end of the object A to be bolted. Thus, the wrench body 10 is prevented from rotating about the center of rotation of the vane 21.

A "C" shaped beam (hereinafter, referred to as a "beam") for forming a skeleton of a building as a bolt object A will be described in more detail as an example.

The beam is a standardized building material, and the distance L between one end of the beam and the bolting position is determined. The nut B for bolting by setting the distance between the support portion 32 of the reaction force support bracket 30 and the box 21 to be equal to or slightly longer than the distance L between the one end of the beam and the bolting position, One side of the support portion 32 can be brought into contact with or brought into close contact with one end of the bolt object A in a state in which the box 20 of the offset 20 is fitted to the bolt head (or the bolt head).

Also, since the beam is manufactured in various sizes, the distance L between one end of the beam and the bolting position is set differently according to the standard. It is necessary to adjust the distance between the support portion 32 of the reaction force support bracket 30 and the box 21. To this end, the present invention is characterized in that the reaction force support bracket 30 is offset from the offset 20 by the length of the offset 20 And a bracket position adjusting mechanism 50 for adjusting the distance between the support portion 32 and the box 21. [

The bracket position adjusting mechanism 50 of the present invention is provided between the offset 20 and the reaction force supporting bracket 30 as shown in Figs. A groove 51 and a fixing pin 52 selectively inserted into and detached from the fixing groove 51 and an elastic member 53 for elastically operating the fixing pin 52.

The fixing groove 51 is arranged in the moving direction of the reaction force supporting bracket 30 and can be set corresponding to the change in the distance L between the bolting position and the one end of the normalized beam, The elastic member 53 is provided on the reaction force supporting bracket 30 so as to be movable between a fixed position inserted into the groove 51 and a fixed release position releasing from the fixing groove 51, The resilient force is applied between the support brackets 30 so that the resilient force is applied so that the fixing pin 52 is always in the fixed position to be inserted into the fixing groove 51.

The bracket position adjustment mechanism 50 further includes guide means for linearly moving the reaction force support bracket 30 along the plurality of fixing grooves 51. [ The guide means forms a guide groove 54 in the offset 20 in the moving direction of the reaction force supporting bracket 30 and the reaction force supporting bracket 30 is provided with guide protrusions 55 ) Can be formed.

9, 10A, and 10B, the offset rotation mechanism of the present invention connects the wrench body 10 and the offset 20 and transmits a rotational force to the wrench body 10 with the gear train of the offset 20, The first rotary member (11) is installed on the outer circumference of the connection portion (11) provided with the rotary shaft (11a) for fixing the wrench body (10) And a lower second rotating member 42 fixed to the offset 20 side.

The first and second rotary members 42 are cylindrically shaped and are provided on the outer circumference of the connection portion 11 and are rotatably supported at the lower end of the first rotary member 41 and at the upper end of the second rotary member 42 Like projections 41a and 42a, respectively.

A cover member 43 is provided on the outer side of the first rotating member 41 and the second rotating member 42 so that the cover member 43 is engaged with the serration projections 41a of the first rotating member 41 Shaped projecting portion 42a of the second rotary member 42 and the disengaged position at which the second rotary member 42 is separated from the second rotary member 42. The cover member 43 and the second rotary member 42 The elastic member 44 is elastically provided between the first rotary member 41 so that the serrated projection 42a of the second rotary member 42 is always engaged with the serrated projection 41a of the first rotary member 41 So that the elastic force is applied so as to be in the engaged position where it is engaged.

Hereinafter, the operation of the present invention will be described.

7 and 8, a nut 21 provided at an offset 20 of an air torque wrench is inserted into a nut B (or a bolt head) at a bolting position of the object A, The support portion 32 of the reaction force support bracket 30 comes into contact with or comes close to one end of the object A to be bolted.

In this state, when the air pressure of the compressor is supplied to the wrench body 10 to perform the bolting operation, the bolt 21 is rotated to perform the bolting operation.

At this time, when the nut B is tightened, a large reaction force is generated between the box 21 of the offset 20 to be rotated at the end of the nut B and the tightened nut B so that the wrench body 10 moves in the opposite direction of tightening When the nut B is rotated and the nut B is tightened, a large reaction force is generated in the direction opposite to the direction in which the nut B is initially tightened and the wrench body 10 is rotating in the opposite direction. A is in contact with or close to the support portion 32 of the reaction force support bracket 30, the rotation of the wrench body 10 can be prevented.

Therefore, it is possible to prevent the reaction force generated during the bolting operation from being transmitted to the worker as it is, so that the bolting work can be carried out more smoothly, and safety can be ensured especially from the risk of the worker falling down during the high-altitude work.

In addition, the present invention can adjust the position of the reaction force supporting bracket 30 according to the distance L between the bolting position and the one end of the object A to be bolted.

5 and 6, when the fixing pin 52 of the bracket position adjusting mechanism 50 is pulled to the fixing release position, the elastic member 53 is compressed and the end of the fixing pin 52 is fixed to the fixing groove The position of the reaction force supporting bracket 30 can be changed by the guide groove 54 and the guide protrusion 55. [

When the end of the fixing pin 52 is aligned with the fixing groove 51 of the moved position and then the fixing pin 52 that has been pulled is placed, the fixing pin 52 Is moved to the fixing position and inserted into the fixing groove 51 at the position where the end is moved, the reaction force supporting bracket 30 can be held in a fixed state at the moved position.

The offset rotation mechanism 40 is used to rotate the angle of the offset 20 relative to the wrench body 10 in correspondence with the shape of the object A to be bolted, .

10A and 10B, when the cover member 43 of the offset rotation mechanism 40 is moved downward, the elastic member 44 is compressed and the offset 20 and the second rotary member Like projecting portion 42a of the second rotary member 42 is separated from the serrated projection 41a of the first rotary member 41 so as to be disengaged from the connecting portion 11, It is possible to rotate the offset 20 about the wrench body 10 about the vertical direction orthogonal to the longitudinal direction of the wrench body 10 as in FIGS. 11A and 11B.

When the offset 20 is rotated to a desired position and then the cover member 43 is moved downward, the offset 20 is rotated by the elastic restoring force of the compressed elastic member 44 and the second rotation The member 42 is lifted and the upper and lower serrated projections 41a and 42a are engaged with each other, so that the offset 20 can be maintained in a fixed position at the rotated position.

This offset rotation function rotates the angle of the offset 20 with respect to the wrench body 10 in correspondence with the shape of the object A, the position of the bolt or the work space, as shown in FIGS. 12A to 12C, In particular, it can be used very usefully in a complaint operation in which a worker can not freely take a work posture, so that a stable posture can always be provided to an operator.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the present invention and not to be construed as limiting the scope of the present invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: wrench body 11: connection part
20: Offset 21: Vox
30: reaction force supporting bracket 40: offset rotation mechanism
41, 42: first and second rotary members 41a, 42a: tooth-
43: cover member 44, 53: elastic member
50: block position adjusting mechanism 51: fixing groove
52: fixing pin 54: guide groove
55: Guide protrusion A: Bolted object
B: Nut

Claims (6)

An air torque wrench comprising a wrench body and an offset connected via a connection to a distal end of the wrench body and having a box for a bolting operation,
A reaction force supporting bracket installed at the offset and supporting the offset at one end of the object to be bolted so that the wrench body can not rotate about the box while the vortex of the offset is fitted to the bolt or nut of the object to be bolted; ,
And a bracket position adjusting mechanism for moving the reaction force supporting bracket in the longitudinal direction of the offset with respect to the offset,

The bracket position adjusting mechanism includes:
A plurality of fixing grooves formed at offset positions in the moving direction of the reaction force supporting bracket,
A fixing pin provided on the reaction force supporting bracket so as to be movable between a fixing position inserted into the fixing groove of the offset and a fixing release position releasing from the fixing groove,
An elastic member provided between the fixing pin and the reaction force supporting bracket to elastically apply force to the fixing pin such that the fixing pin is always inserted into the fixing groove,
A guide groove formed in the offset direction in a moving direction of the reaction force supporting bracket,
And a guide protrusion formed on the reaction force supporting bracket and guided in the guide groove. delete delete delete The air torque wrench according to claim 1, further comprising an offset rotation mechanism installed between the wrench body and the offset to rotate the offset with respect to the wrench body about a vertical direction orthogonal to the longitudinal direction of the wrench body. . 6. The wrench according to claim 5, wherein the offset rotation mechanism comprises: a first rotary member, which is installed around a connection portion connecting the wrench body and the offset, and is fixed to the connection portion side of the wrench body and has a serration- Like lower protrusion of the first rotary member, and a serrated protrusion fixed to the offset side and engaging with the serrated serrated protrusion of the first rotary member at an upper end thereof; and a lower second rotating member fixed to the lower side of the first rotating member and the second rotating member The cover member being configured to move the second rotary member between a coupling position where the tooth-like projection of the first rotary member and a tooth-like projection of the second rotary member are engaged with each other, Like projections of the second rotary member are always engaged with the toothed projections of the first rotary member so that the toothed projections of the second rotary member are always engaged with the toothed projections of the first rotary member And an elastic member for applying an elastic force.

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