KR20140055748A - Balance jig for manufacturing pipe arrangement - Google Patents

Abstract

The present invention relates to a balance jig for processing a pipe capable of easily manufacturing a large pipe and increasing a process precision by preventing vibration and inclination during the rotation of a pipe for manufacturing a large pipe. The balance jigs (100, 100a) for processing a pipe comprise a band part (110) having a band side fixing plate (120) and fastened to a processing target pipe (11); a weight part mounted in the band part (110); and a fastening part (140) fixing the weight part to the band part (110) by being fastened to the band side fixing plate (120). The balance jig for processing a pipe can maintain the balance of the pipe (11) when the pipe (11) is rotated by a rotator (30), by making the weight part to be placed opposite to a protrusion (20) of the pipe (11).

Description

{BALANCE JIG FOR MANUFACTURING PIPE ARRANGEMENT}

The present invention prevents the generation of vibration and tilting during rotation of a pipe by adjusting the center of gravity when rotating a large pipe for manufacturing a large pipe, thereby facilitating the production of a large pipe, And more particularly, to a balance jig for pipe-pipe processing.

Generally, in the case of manufacturing a large pipe, a large pipe welding and cutting operation is performed in a pipe factory. In this case, the pipe to be processed is rotated while being rotated by data.

Fig. 1 is a view showing a conventional pipe processing process.

As shown in FIG. 1, in order to manufacture the piping 10 in the piping plant, various types of pipes 11 such as a tubular, an elbow, and a T-type are welded to the pipeline. Then, a part of the manufactured piping is transferred to a piping installation place of a ship or the like, and then welded together, thereby manufacturing an entire pipeline.

At this time, in the case of a large pipe having a large load, which is difficult to work with a human force, as shown in Fig. 1, the pipe 11 as a part of the pipe 10 is placed on the rotator 30 and then the rotator 30 is rotated By fixing it to a certain position, a welding posture in which an operator can perform welding is made. Thereafter, the operator moves and performs pipe processing such as welding or cutting to the pipe.

However, as described above, when the pipe is rotated to rotate the pipe using the rotator 30 to perform a machining operation on the pipe, a protruding portion 20 such as a T-shaped pipe is attached and the bent portion 20a The center of gravity does not coincide with the center of rotation of the rotator 30 due to the load of the protruding portion 20 or the bent portion 20a so that the rotating pipe 11 is rotated by the protruding portion 20, An accident occurs in which a change in position, such as vibration, inclination, or the like occurs due to the load and the torque of the rotor 20a or when the rotor 20 is severely disengaged from the rotor 30.

Therefore, when the pipe 11 is rotated in the welding posture by using the rotator 30 in the conventional technique of FIG. 1, there is a problem that a large number of defects are generated in the welded surface or the cut surface .

1, the rotator 30 performs only the function of rotating the pipe 11 in order to make the welding posture of the worker. Therefore, So that the welding operation is delayed.

Further, in the conventional pipe processing apparatus using the rotator 30 of FIG. 1, when the pressing force is increased to fix the pipe, the pipe 11 is deformed.

1, the center of gravity of the pipe 11 does not coincide with the axis of rotation, so that a safety accident due to the disengagement of the pipe 11 from the rotator 11 can be prevented There is a problem that can occur.

Further, in the case of the prior art pipe machining apparatus using the rotator 30 shown in Fig. 1, since the worker moves and performs the pipe machining work such as welding, the problem of the possibility of the musculoskeletal disease of the worker due to the inconvenience of the work posture .

In addition, in the conventional pipe processing apparatus using the rotator 30 of FIG. 1, there is a problem that deformation may occur in the pipe 10 due to the mismatch of the center of gravity.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a pipe structure for a pipe, So that the rotating pipe can maintain a balance around the rotating shaft and the pipe can be easily machined such as welding or cutting and the quality of the processed surface of the pipe can be remarkably improved And to provide a balance jig for pipe pipe processing.

The present invention relates to a pipe jig for a pipe-pipe processing, comprising: a band portion 110 having a band-side fixing plate 120 and fastened to a pipe to be processed 11; And the engaging portion 140 coupled to the band side fixing plate 120 and fixing the weight portion to the band portion 110. The weight portion is connected to the projecting portion 20 of the pipe 11, So that the balance of the pipe 11 is maintained when the pipe 11 is rotated by the rotator 30. [

The band part 110 includes a band 111 having a first band 111a and a second band 111b separated and coupled to an outer diameter of an arc-shaped pipe, A hinge part 113 for rotatably coupling the first band 111a and the second band 111b to each other at one coupling part of the two bands 111b, A band coupling portion 114 coupled to fix the pipe 11 which is opened or inserted so as to be inserted into the pipe 11 on the opposite side of the hinge portion 113 of the first band 111a, And a band side fixing plate 120 protruding from the at least one of the first band 111a and the second band 111b in the outer diameter direction of the pipe 11.

A fixing plate through hole 123a is formed in the center of the band side fixing plate 120. The band portion 110 is inserted into the fixing plate through hole 123a and is engaged with the band side fixing plate 120 And a load body fixing pin (122) for fixing the load body (140).

The load body fixing pin 122 is a magnetic body fixing pin.

The weight portion 151a has a hollow portion formed with a through hole, a fixing bar 153a coupled to the band portion 110 and through which the weight 151a is inserted, And a fastener 153b coupled to an end of the fastening bar 153a protruding through the fastening portion 153a and fixing the weight 151a so as not to be detached from the fastening bar 153a.

And the weight portion is constituted by a magnet weight (151).

The engaging portion 140 is formed with an insertion opening 140c formed at a lower portion of the pipe 11 side in the circumferential direction of the pipe 11 so that the band side fixing plate 120 is inserted, (See FIG. 7) and the second engaging plate 140b (see FIG. 7) configured to be in close contact with both sides of the insertion opening 140c and a lock holder And a lock bar 141b coupled to receive a resilient force inserted into the lock holder 141a by a lock elastic body 141e at the other side of the lock holder 141a; And a locking bar portion 143 for fixing the locking portion 141 such that the locking portion 141 keeps the insertion opening 140c in an opened state.

The above-mentioned construction of the above-described pipe jig 100 for a pipe-pipe processing is further characterized in that one end portion is coupled to the engagement portion 140 and the other end portion is slidably engaged with the weight portion, And a length adjuster 130 for adjusting the length of the light emitting diode.

The length adjusting part 130 includes a sliding rail 131 formed with a plurality of length adjusting pinholes 133 in the longitudinal direction and coupled to the coupling part 140, And a rail plate hole 138 (see FIG. 2) is formed on one side of the rail guide 137 (see FIG. 7) to slide on the sliding rail 131 (See Fig. 2 and Fig. 7) coupled to the rail guide 137 (see Fig. 7) on the side where the weight plate (not shown) is coupled, and a support plate 157 (See FIG. 2 and FIG. 7) attached to the weight plate 131 (see FIG. 2) The length adjusting pins 133a and 133b are inserted into the sliding rail 131 to fix the position of the weight portion on the sliding rail 131, (See FIG. 2).

In the case of performing the pipe machining such as welding or cutting using the rotator 30 for machining a large pipe into piping parts, the balance jig 100 or 100a for pipe piping according to the present invention having the above- The center of gravity of the pipe is made to coincide with the center of rotation, thereby facilitating the pipe machining and improving the precision and quality of the pipe machined portion.

The balance jigs 100 and 100a of the present invention can adjust the center of gravity of the pipe 11 to the center of rotation by the weight portions 150 and 150a, The worker can perform welding or cutting work on the pipe while being fixed at a specific position, thereby providing an effect of significantly improving the welding speed.

In addition, in the case of a pipe jig 100 or 100a for pipe piping according to the present invention, when a work is performed on a pipe, when the projection 20 such as a T pipe is attached, the balance jig 100 or 100a is rotated by the load of the T pipe The pipe 11 does not vibrate or tilt due to the torque of the protruding portion 20 for each rotational position, and thus the pipe machining quality of the welded surface or the cut surface is remarkably improved.

The balance jigs 100 and 100a for pipe piping according to the present invention can position the center of gravity of the center of gravity of the center of gravity by the weight portions 150 and 150a on the rotary shaft of the pipe 11, It is possible to minimize the change in the shape of the pipe due to the pressing force for fixing the pipe during the pipe working.

In the pipe jig 100 and 100a of the present invention, since the center of gravity of the pipe 11 coincides with the rotation axis, the pipe 11 is prevented from disengaging from the rotator 30, Thereby providing an effect of preventing the occurrence of the problem.

In addition, since the balance jigs 100, 100a for pipe piping according to the present invention perform welding at a fixed position, the pipe can be machined in the most convenient posture, and the worker's musculoskeletal diseases And the like.

In addition, since the piping pipe processing balance jigs 100 and 100a of the present invention are provided by the engagement of the pins, it is possible to rapidly perform the work for maintaining the balance for the pipe working.

1 is a view showing a conventional pipe processing process,
2 is a perspective view of a piping pipe balance jig 100 (hereinafter referred to as a "balance jig 100") having a first weight portion 150 formed of a mark net weight 151 according to an embodiment of the present invention. Front view,
3 is a perspective view of the band portion 110 of the balance jig 100 of FIG. 2 in a state coupled to the pipe 11,
4 is a detailed view of a coupling portion 140 showing a state in which the insertion opening 140c of the coupling portion 140 of FIG. 2 is opened,
5 is a detailed view of a coupling portion 140 showing a closed state of the insertion opening 140c of the coupling portion 140 of FIG. 2,
6 is a side view of a balance jig 100a having a second weight portion 150a which can be controlled by a variable weight according to another embodiment of the present invention,
Fig. 7 is a use state diagram of the balance jigs 100 and 100a of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings showing embodiments of the present invention.

2 is a perspective view of a piping pipe balance jig 100 (hereinafter referred to as a "balance jig 100") having a first weight portion 150 formed of a mark net weight 151 according to an embodiment of the present invention. 3 is a perspective view of the band portion 110 of the balance jig 100 of Fig. 2 in a state coupled to the pipe 11. Fig.

2 and 3, the balance jig 100 includes a band portion 110 coupled to the pipe 101, a length adjusting portion 130 coupled to the band portion 110, The slide is also capable of being engaged in the groove 130 so as to provide a load in the opposite direction corresponding to the torque force by the protruding portion 20 formed in the pipe 11 or the bent portion 20a (see Figs. 1 and 7) And a coupling unit 140 coupling and fixing the first weight unit 150 and the length adjuster 130 or the first weight unit 150 to the band unit 110.

The band portion 110 includes a band 111 having a first band 111a and a second band 111b that are separated and coupled to be coupled to the outer diameter of the arc-shaped pipe. The first band 111a and the second band 111b are formed with a hinge portion 113 to which the first band 111a and the second band 111b are rotatably coupled to each other. A band coupling portion (not shown) coupled to fix the pipe 11 which is opened or inserted so as to be inserted into the pipe 11 at a side opposite to the hinge portion 113 of the first band 111a and the second band 111b 114 are formed.

2, the first band 111a and the second band 111b are opened and closed at the ends of the coupling band 114 and the coupling flange 112 And is tightly fixed to the outer peripheral edge of the pipe 11 by being configured to be engaged and fixed to the coupling flange 112 by bolts 117a and nuts 117b.

The band part 110 may protrude in at least one of the first band 111a and the second band 111b in the circumferential direction of the band 111 to form a length adjusting part 130 or a first weight part 150 Side fixing plate 120 is formed so as to be able to fix the band-side fixing plate 120. A fixing plate through hole 123a (see FIG. 3) is formed in the central portion of the band side fixing plate 120 so as to be inserted through the load fixing pin 122. The band portion 110 may include a fixing plate through hole 123a and a coupling portion 140 to be described later when the length adjusting portion 130 or the first weight portion 150 is coupled to the band side fixing plate 120. [ Side fixing plate 120 is inserted into the insertion opening 140c formed at the pipe side end portion of the first coupling plate 140a and the second coupling plate 140b of the first and second weight plates 140a and 140b, And a load body fixing pin 122 for fixing the body 150.

The coupling portion 140 is configured to couple the length adjusting portion 130 or the first weight portion 150 to the band portion 110.

4 is a detailed view of a coupling portion 140 showing a state in which the insertion opening 140c of the coupling portion 140 of FIG. 2 is opened. FIG. 5 is a view showing the insertion opening 140c of the coupling portion 140 of FIG. And a coupling unit 140 for indicating a closed state.

Hereinafter, the configuration of the coupling portion 140 will be described in detail with reference to FIGS. 2 to 5. FIG.

2 to 5, the coupling unit 140 includes a first coupling plate 140a which is inserted into and coupled with the band-side fixing plate 120 by forming a space into which the band-side fixing plate 120 can be inserted, 7), and a second coupling plate 140b (see Fig. 7).

7) and the second coupling plate 140b (see FIG. 7) are provided on the pipe 11 side in the circumferential direction of the pipe 11 so that the load body fixing pin 122 can be inserted into the pipe 11 side of the first coupling plate 140a And a lock portion 141 for locking the load body fixing pin 122 inserted into the insertion opening 140c so as not to be separated from the insertion opening 140c are formed.

2 to 5, the lock portion 141 includes a lock holder 141a, a lock bar 141b, a lock elastic body 141e, and a lock barrel portion 143 .

The lock holder 141a has an end portion of the lock bar 141b at one side of the insertion opening 140c formed in the first engagement plate 140a (see FIG. 7) and the second engagement plate 140b As shown in FIG.

The lock bar 141b is formed with a slide hole 141c in a central portion thereof so that the lock elastomer fixture 141f can be moved. The lock bar 141b is inserted into the insertion hole 141b at the opposite end of the end inserted into the lock holder 141a. And a lock bar knob 141g for moving the lock bar knob 140c to the open state. 7) (or a second engaging plate 140b (see FIG. 7)) is provided on the inner side of the slide hole 141c so as to fix the one end of the lock elastic body 141e. (141f). The other end of the lock elastic body 141e is fixed to the lock bar knob 141g so that the lock bar 141b is always urged to apply an elastic force to insert the lock bar 141b into the lock holder 141a. The lock bar knob 141g on the upper side of the lock bar 141b is moved in a direction perpendicular to the surface of the band side fixing plate 120 so that the lock bar 141b can maintain the opened state of the insertion opening 140c A lock bar stopper 141d is formed which is protruded by a predetermined width and is engaged with the locker 143c of the lock bar portion 143 to be described later.

The upper portion of the lock bar portion 143 forms a rocker lever 143a and the portion of the lock bar portion 143 that is bent in the horizontal direction is formed into a letter shape to function as a locker 143c engaged with the lock bar stopper 141d, The bent portion is rotatably mounted on the first engaging plate 140a (see FIG. 7) (or the second engaging plate 140b (see FIG. 7)). The locker 143c is engaged with the lock bar stopper 141d between the rocker lever 143a and the first engaging plate 140a (see FIG. 7) (or the second engaging plate 140b And a rocker elastic body 143d that applies an elastic force to the lever 143a.

The length adjuster 130 includes a sliding rail 131, a sliding rail reinforcement 139, a rail guide 137 (see FIG. 7), a rail plate 135 (see FIGS. 2 and 7) A supporting plate stiffener 155 (see Figs. 2 and 7), and a length adjusting pin 133a (see Fig. 2).

The sliding rail 131 is formed with a plurality of length-adjusting pinholes 133 (see FIG. 2) in the longitudinal direction thereof and the first weight portion 150 (see FIG. 2) Of the sliding rail 131 can be adjusted.

The sliding rail reinforcement 139 is attached to the sliding rail 131 to prevent the sliding rail 131 from being deformed by the load of the first weight portion 150 during rotation of the pipe 11. [

The rail guide 137 is configured to be coupled to the sliding rail 131 while sliding the sliding rail 131 to be slidable on the sliding rail 131.

The rail plate 135 (see FIGS. 2 and 7) is attached to the rail guide 137 (see FIG. 7) at one side of the sliding rail 131.

2 and 7) are formed at the ends of the rail plate 135 (see Figs. 2 and 7) in a direction perpendicular to the surface of the bottom rail plate 135 (see Figs. 2 and 7) So that the magnet weight 151 or the weight 151a can be mounted.

In FIGS. 2 to 5, the magnet weight 151 is applied as a weight (load body).

2) is formed in the rail plate hole 138 (see FIG. 2) formed in the length adjusting pinhole 133 (see FIG. 2) and the rail plate 135 (see FIGS. 2 and 7) So as to fix the position of the first weight part 150 on the sliding rail 131. The length adjusting pin 133a (see FIG. 2) is made of a magnetic material and attached to the length adjusting pinhole 133 (see FIG. 2) and the rail plate hole 138 (see FIG. 2) Or the like.

The first weight part 150 may be configured to mount a weight having a different load according to the protruding part 20 or the bent part 20a formed in the pipe 11.

2 to 5, the first weight unit 150 includes a magnet weight 151 that maintains a state in which the permanent magnet is attached to the base plate by the magnetic force due to the generation or disappearance of magnetism by the magnet switch 153, As shown in FIG. The magnet weights 151 and the plurality of mark net weights 151 can be added and removed so that the weight 151a or the magnet weights 151a, 151) to be added or reduced.

FIG. 6 is a side view of a balance jig 100a having a second weight portion 150a whose load can be adjusted by the variable weight 151a according to another embodiment of the present invention.

As shown in Fig. 6, the first weight portion 150 of Figs. 2 to 5 may be constituted by a second weight portion 150a configured to attach or detach a general weight body other than a magnetic body.

6, the configuration of the band portion 110 and the length adjusting portion 130 except for the second weight portion 150a is the same as that of FIG. 2 to FIG. 5, Only the second weight portion 150a will be described.

The second weight portion 150a includes a weight, a fixing bar 153a, and a fixture 153b.

The weight 151a is formed in a plate shape having a hollow portion formed with a through hole.

The fixing bar 153a is vertically fixed to the receiving plate 157, and the weight 151a is inserted through the through hole.

After the weight 151a of the desired load is mounted on the fixing bar 153a, the fixing member 153b is coupled to the end of the fixing bar 153a so that the weight 151a is separated from the fixing bar 153a .

Fig. 7 is a use state diagram of the balance jigs 100 and 100a of the present invention.

Hereinafter, the use states of the balancing jig 100 and 100a of the present invention will be described with reference to Figs. 2 to 7. Fig.

In the following description, the case where the first weight portion 150 and the second weight portion 150a are collectively referred to will be described as a weight portion.

In the case where a pipe machining operation such as welding or cutting is to be performed on the pipe 11 for manufacturing a component of the pipe 10 having the protruding portion 20 and the bent portion 20a as shown in Fig. 1, 7, the band portion 110 is mounted on the opposite side of the pipe 11 on which the projecting portion 20 or the bent portion 20a is formed and fixed.

After the load body fixing pin 122 is inserted into the through hole 123a of the band side fixing plate 120 (see FIG. 3), the length adjusting portion 130 or the weight portion 150 or 150a, (140). In this process, the engaging part 140 is mounted so that the load body fixing pin 122 is inserted through the insertion opening 140c. The load fixing pin 122 is also made of a magnetic material and is inserted into the band fixing plate 120 and the first coupling plate 140a (see FIG. 7) and the second coupling plate 140b, see FIG. 7) by a magnetic force so as not to require fixing for fixing, but it may be constituted by a bolt and a nut which are nonmagnetic.

At this time, the lock bar 141b is kept in a state where the locker 143c is caught by the lock bar stopper 141d as shown in FIG. 4, so that the insertion opening 140c is kept open.

5, the rocker lever 143d is rotated in the counterclockwise direction as shown in FIG. 5, after the engaging portion 140 is attached to the band side fixing plate 120 through the insertion opening 140c in the opened state, Thereby releasing the engagement of the locker 143c from the lock bar stopper 141d.

The lock bar 141b is moved to the lock holder 141a side by the lock elastic body 141e and the lock holder 141a of the lock bar 141b is released, Side end portion is inserted into the lock holder 141a so that the lock bar 141b supports the lower portion of the load body fixing pin 122 and is fixed so that the engaging portion 140 is not separated from the band side fixing plate 120. [

Next, as shown in Fig. 2, the torque of the weight portions 150 and 150a on the sliding rail 131 of the length adjusting portion 130 is canceled by the load of the protruding portion 20 or the bent portion 20a (See FIG. 2 and FIG. 7) at a proper position with the rail plate hole 138 (see FIG. 2) after the position of the weight supporting plate stiffener 155 The adjustment pin 133a (see FIG. 2) is inserted to fix the proper position of the weight portion. In this case, the length adjusting pin 133a (see FIG. 2) is also made of a magnetic material and does not require a separate fastener. However, it may be formed of a bolt and a nut which are spindle bodies like the load body fastening pin 122 described above.

After the center of rotation of the pipe 10 coincides with the center of rotation of the rotator 30 as described above, the operator rotates the pipe 10 using the rotator 30, To perform the pipe machining work such as welding or cutting to the pipes 11 of the pipe.

The present invention is not limited to the length adjusting part 130 in the configurations of the above-described Figs. 2 to 6, and the weight part (the first weight part 150 or the second weight part 150a) The torque applied to the protruding portion 20 or the bent portion 20a is canceled by adjusting the load of the weight portion.

100, 100a: (for piping pipe processing) Balance Jig
110: band part 111: band
113; Hinge portion 114:
115: Coupling flange
130: length adjuster 131: sliding rail
133: length adjusting pinhole 133a: length adjusting pin
135: Rail plate 138: Rail plate hole
140: engaging portion 141:
141a: Lock holder 141b: Lock bar
141c: Sliding hole 141d: Lock bar stopper
141e: Locking elastic body 141f: Locking elastic body fixing member
141g: lock bar handle 150: first weight part
151: Magnet weight 153: Magnet switch
150a: second weight portion 151a: weight
153a: Fixing bar 153b: Fixture
155; Weight support plate 157: support plate

Claims (9)

A band portion 110 having a band side fixing plate 120 and fastened to the pipe to be processed 11;
A weight portion mounted on the band portion 110,
And a coupling part (140) coupled to the band side fixing plate (120) and fixing the weight part to the band part (110). [2] The apparatus according to claim 1,
A band (111) having a first band (111a) and a second band (111b) detachably coupled to the outside diameter of the arched pipe,
A hinge part 113 for rotatably coupling the first band 111a and the second band 111b at one side of the first band 111a and the second band 111b,
And a band coupling portion 114 (not shown) coupled to fix the pipe 11 which is opened or inserted so as to be inserted into the pipe 11 at a side opposite to the hinge portion 113 of the first band 111a and the second band 111b );Wow,
And a band side fixing plate 120 protruding from the at least one of the first band 111a and the second band 111b in the outer diameter direction of the pipe 11, . The method of claim 2,
A fixing plate through hole 123a is formed in the center of the band side fixing plate 120,
The band portion 110 further includes a load body fixing pin 122 inserted into the fixing plate through hole 123a and fixing the coupling portion 140 coupled to the band side fixing plate 120 Features a balanced jig for pipe work. The method of claim 3,
Wherein the load body fixing pin (122) is a magnetic substance fixing pin. [2] The apparatus of claim 1,
A weight 151a formed with a hollow portion having a through hole,
A fixing bar 153a coupled to the band portion 110 to receive the weight 151a through the through hole,
And a fixture 153b coupled to an end of the fixing bar 153a protruding through the hollow portion to fix the weight 151a so as not to be separated from the fixing bar 153a. Balance jigs for pipe processing. The apparatus according to claim 1,
And a magnet weight (151). The connector according to claim 1, wherein the coupling portion (140)
Side fixing plate 120 is inserted into the lower portion of the side of the pipe 11 so as to be in close contact with the both side surfaces of the band side fixing plate 120. [ A first coupling plate 140a and a second coupling plate 140b,
A lock holder 141a formed on one side of the insertion opening 140c;
A lock part 141 having a lock bar 141b coupled to receive the elastic force inserted into the lock holder 141a by the lock elastic body 141e at the other side of the lock holder 141a;
And a locking bar portion (143) for fixing the locking portion (141) so that the locking portion (141) keeps the insertion opening (140c) in an opened state. The method according to claim 1,
And a length adjusting unit 130 coupled to the coupling unit 140 at one end and slidably coupled to the weight unit at the other end to enable adjustment of the length between the pipe 11 and the weight unit Wherein the first and second projections are formed in a substantially cylindrical shape. [8] The apparatus of claim 8, wherein the length adjuster (130)
A sliding rail 131 formed with a plurality of length-adjusting pinholes 133 in the longitudinal direction and coupled to the coupling portion 140,
A rail guide 137 slidably coupled to the sliding rail 131,
A rail plate 135 having a rail plate hole 138 formed at one side thereof and coupled to the rail guide 137 at a surface of the rail guide 137 where the sliding rail 131 is engaged;
A weight support plate stiffener 155 mounted on the rail plate 135 including a support plate 157 to which the weight portion is attached,
And a length adjusting pin 133a inserted into the length adjusting pin hole 133 and the rail plate hole 138 to fix the position of the weight portion on the sliding rail 131. [ Workable balance jig.

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