KR20060117575A - Automatic welding apparatus for connecting piles - Google Patents

Abstract

An automatic welding machine for connecting piles capable of automatically welding and connecting two or more piles, preventing safety accident even under poor working conditions, maintaining welding quality uniformly and excellently, carrying out welding operation even with limited manpower without a skilled worker, and simultaneously performing welding operation at various locations is provided. An automatic welding machine for connecting piles comprises: a guide(10) comprising a cylindrical body(12) externally inserted on an upper portion of a pile, a rail(14) having a rack(141) formed on an upper surface thereof, through holes(16) formed on the body in upper and lower parts of the rail, and clamps installed in the respective through holes to fix the body to the pile; a carriage comprising a front plate(21) having an opening(211) formed at the center thereof, an upper frame(22) that is formed on an upper portion of the front plate and has rollers(24) formed at both sides thereof, and a lower frame that is fixed to a lower portion of the front plate and has rollers(25) formed at both sides thereof; a drive unit(30) comprising a housing(31) having a fixing groove(32) formed on a side portion thereof, an actuator(33) embedded in the housing and inserted into the opening to move the carriage, and a drive rod(34) which is rotatably installed on the actuator and has a pinion(341) formed on an end thereof; and an adjusting device(40) comprising a first fixing member(41) fixed to the fixing groove of the housing, a first supporting rod(42) vertically movably fixed to the first fixing member, a second fixing member(43) fixed to an upper portion of the first supporting rod, a second supporting rod(44) of which one end is fixed to the second fixing member, a third fixing member(45) movably fixed to the second supporting rod, a bracket(46) installed on an upper portion of the third fixing member, and a torch fixing member(47) removably mounted on the bracket.

Description

Automatic welding apparatus for connecting piles}

1 is a side view showing a conventional file welding method.

Figure 2 is an exploded perspective view of an automatic welding machine for pile connection according to the present invention.

3A is a perspective view of the guide of the automatic welding machine of FIG. 2, and FIG. 3B is a cross sectional view of FIG. 3A.

3C is a longitudinal cross-sectional view of FIG. 3A with the clamp omitted.

4a to 4c are perspective, front and side views of the carriage of the automatic welding machine of FIG.

5 is a perspective view showing in detail the driving unit of the automatic welding machine of FIG.

Figure 6 is a perspective view showing a torch adjustment device of the automatic welding machine of Figure 2;

7 is a perspective view showing an automatic welding operation using an automatic welding machine according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: guide 12: body

14: rail 20: carriage

22: upper frame 23: lower frame

30: drive unit 33: actuator

34: drive rod 40: adjuster

41: first fixing member 42: first support rod

44: second support rod T: welding torch

The present invention relates to an automatic welding machine for pile connection for connecting each pile when the pile is bored for the foundation construction at the construction site, but in more detail, the upper, middle, and lower piles are automatically welded and connected in the field. The present invention relates to an automatic welding machine for pile connection, which can prevent a safety accident in a harsh working environment, maintain a uniform and excellent quality of welding, and reduce costs.

In general, in order to construct a variety of buildings or structures at the construction site or civil engineering site, it is necessary to establish a solid foundation so that they can be stably supported and maintained. In order to secure such a stable foundation or foundation, a work of type or perforation of a pile called a foundation pile is performed. This file type operation is performed so that even the rock existing in the ground can be typed so that the file can be stably fixed and supported.

This type of file is done as shown in FIG. In other words, after determining the placing position of the pile to determine one pile (lower pile) (1) and then hit it using the rudder 3 of the crane (2). At this time, when the depth of the rock S existing in the ground E is located at a depth greater than the length of the pile 1 of 15 m, for example, the other pile 1 'is placed on top of the pile 1. ) Should be connected. Welding is used to connect these piles (1,1 '). Most of such welding work is performed manually by a welder or an operator.

However, according to the conventional pile connection method, the welder manually welds in a poor working environment for the pile connection, the work is difficult, and this can lead to the phenomenon of avoiding the work, and always the skilled welder As it is difficult to secure, the welding quality may vary depending on the skill of the welder, which may lower reliability.

The present invention has been made in view of the above-described problems, an object of the present invention can be automatically connected to two or more piles directly at the foundation construction site, to prevent safety accidents in poor working environment, welding Automatic welding machine that can keep the quality of the machine uniformly and excellently, and can perform welding work with limited manpower without skilled workers, and can save the cost by welding several places at the same time by inputting multiple equipments To provide.

In order to achieve the above object, the present invention, the pile automatic welding machine for connecting the upper, middle, and lower piles during the pile work for the foundation construction in an industrial site or construction site, the cylindrical body and extrapolated to the upper end of the pile A rail formed integrally with the central outer side of the body and having a rack formed on the upper surface thereof; a through hole formed along a predetermined distance between upper and lower portions of the rail of the body; and installed in the respective through holes. A guide having a clamp for fixing the to the pile; A front plate movable along the guide and having an opening formed at a center thereof, an upper frame provided at an upper portion of the front plate and having rollers inserted at both sides of the guide in a cloudable manner, and the front plate A carriage having a lower frame fixed to the lower side and having rollers inserted into the lower side of the guide so as to be able to roll; A housing detachably mounted to the carriage and having a fixed groove formed at a side thereof, an actuator embedded in the housing for moving the carriage, and rotatably installed at the actuator, the rack formed at a rail of the guide at an end thereof. A drive unit having a drive rod having a pinion to be movablely engaged; And a first fixing member fixed to the fixing groove of the housing of the drive unit, a first supporting rod fixed to the first fixing member so as to be movable up and down, and a second fixing fixed to an upper end of the first supporting rod. A member, a second support rod having one end fixed to the second fixing member, a third fixing member movably fixed to the second supporting rod, a bracket installed on an upper portion of the third fixing member, and Removably mounted to the bracket and characterized in that it comprises an adjusting device having a torch fixing member is vertically fixed to the support is fixed to the welding torch connected to the welding source.

Hereinafter, with reference to the accompanying drawings, an automatic welding machine for file connection according to the present invention will be described in detail.

Figure 2 is a perspective view of the automatic welding machine for pile connection according to the present invention, Figures 3a, 3b and 3c is a perspective view, cross-sectional view and longitudinal cross-sectional view showing in detail the guide of the automatic welding machine for pile connection according to the invention, Figures 4a, 4b and 4c is a perspective view, a front view and a side view of a carriage of the automatic welding machine for pile automatic connection according to the present invention, and FIG. 5 is a perspective view showing the driving unit of the automatic welding machine for pile connection according to the present invention in detail. Figure 6 is a perspective view showing the adjusting device of the automatic welding machine for file connection according to the present invention, Figure 7 is a state diagram showing the welding operation using the automatic welding machine for file connection according to the present invention.

2 to 7, reference numeral 10 is a guide fixed to the pile P to be welded to each other. The guide 10 can be easily extrapolated to the pile P, and has a cylindrical body 12 having a circular cross section. On the center outside of the body 12 is provided with a rail 14 which can be coupled to move the adjustment device to be described later. The rail 14 is provided with teeth, ie, racks 141, which are continuous throughout the upper surface for smooth and accurate rotational movement of the adjusting device. In addition, the through hole 16 is spaced apart from the upper and lower parts of the body 12, that is, the upper and lower parts of the rail along a predetermined interval. Each through hole 16 is actually provided with a clamp 18 for fixing the body 12 to the pile P. The clamp 18 is composed of a support nut 181 installed inside the through hole, and an adjusting bolt 182 penetrating the through hole 16 and screwed to the support nut 181. The head of the adjustment bolt 182 is exposed to the outside of the body 12 so that the operator can tighten or release the adjustment bolt 182, the front end of the adjustment bolt 182 is actually supported in contact with the pile (P) The fixing piece 183 is provided.

In addition, the auxiliary bolt 184 is screwed to the adjustment bolt 182 in order to stably maintain each of the adjustment bolt 182 in a fixed state while the body 12 or the guide 10 is completely fastened. do.

Reference numeral 20 is a carriage coupled to the guide 10 and movable along the guide. The carriage 20 has a front plate 21 to which the adjustment device to be described later is detachably fixed. In the center of the front plate 21, an opening 211 into which the actuator of the adjustment device described later is inserted and fixed is drilled. A plurality of fixing holes 212 for mounting the driving unit to be described later are formed around the opening 211. An upper frame 22 is provided on an upper side of the front plate 21. In the center of the upper frame 22, an adjusting knob 221 is installed to adjust the degree of contact or separation with the guide 20.

In addition, the lower frame 23 is integrally formed under the front plate 21. On both sides of the upper frame 22 is provided with a pair of rollers 24 which are inserted and fastened to the upper side of the guide 20 in a cloudable manner, and the lower side of the guide 20 on both sides of the lower frame 23 likewise. Rollers 25 which are inserted and fastened to the sides in a rolling manner are also provided in pairs.

 In particular, each pair of rollers 24 and 25 provided on both sides of each of the frames 22 and 23 should be installed on the same gradient C as the gradient of the guide 10 for smooth rolling. On the other hand, the upper frame 22 may be detachably assembled to the upper side of the front plate (21). This is useful when the guide 10 and the carriage 20 are assembled in a completely separated state. Of course, in this case, the insertion hole 222 is formed at an appropriate position of the upper frame 22, the insertion hole 222 is installed so that the upper frame 22 to be released on the upper side of the front plate 21. The fastening bolt 223 is provided to. On the other hand, the roller 24 can also be installed detachably to the upper frame 22, in this case the roller 24 is provided with a bolt 241.

Reference numeral 30 denotes a drive unit mounted to the carriage 20. The drive unit 30 is actually provided with a housing 31 which is detachably fixed to the fixing hole 212 of the front plate 21 of the carriage 20 by a bolt 311. The side of the housing 31 is formed with a fixing groove 32 to which the adjustment device described later is detachably fixed. A fastening hole 312 for fastening the first fixing member to be described later is drilled around the fixing groove 32. On the other hand, an actuator 33 for actually generating a driving force is built into the housing. The actuator 33 may be formed of a motor or a reversible motor. The actuator 33 is provided with a driving rod 34 which rotates according to the operation of the actuator, and the end of the driving rod 34 is rotatably engaged with the rack 141 of the rail 14 of the guide 10. Pinion 341 is provided. On the other hand, the upper side of the housing 31 is connected to the cable 35, which is connected to a power source or a battery for supplying power to the actuator 33 by the anchor 36.

Reference numeral 40 is an adjusting device for adjusting the welding torch to perform actual welding while rotating around the pile according to the operation of the drive unit 30. The adjusting device 40 includes a first fixing member 41 fixed to a fixing groove 32 formed at one side of the housing 31 of the drive unit 30. The first fixing member 41 is provided with an insertion portion 411 inserted into the fixing groove 32, the fastening bolt 412 for locking the first fixing member 41 on the side of the insertion portion 411. It is provided to be able to tighten. The guide groove 413 penetrates through the first fixing member 41 in the vertical direction. In addition, a plurality of through holes 414 communicating with the guide grooves 413 are drilled in the side portions of the first fixing member 41, and the through holes 414 adjust for fixing the supporting rods to be described later in the proper positions. The bolt 415 is releasably fastened. In the guide groove 413 of the first fixing member 41, the first support rod 42 for adjusting the vertical height of the adjustment politics is inserted and fixed to be movable up and down. On the side of the first support rod 42, a rack-type tooth 421 is formed in the longitudinal direction for stable and accurate movement with respect to the first fixing member 41. The second fixing member 43 is detachably fixed to the upper end of the first support rod 42. One side of the second fixing member 43 is provided with a handle-type fastener 431 for fixing the second fixing member 43 to the upper end of the first support rod 42, the fixing knob 432 also on the upper surface ) Is fastened and loosened. On the other hand, one side of the second fixing member 43 is formed with a fixing groove 433 is detachably fixed to the second support rod to be described later. In addition, the other handle-type adjustment bolt 434 for fastening the second support rod to be described later is inserted into the fixing groove 433 is fastened and loosened to the upper end of the second fixing member 43. An end of the second support rod 44 is fixed to the fixing groove 433 of the second fixing member 43. On the side of the second support rod 44, a rack tooth 441 is formed in the longitudinal direction so that the third fixing member to be described later can be stably and accurately moved. The third fixing member 45 is movable to the second support rod 44. The third fixing member 45 is provided with a guide groove 451 inserted into the second support rod 44. A plurality of through holes 452 communicating with the guide groove 451 is drilled in the side portion of the third fixing member 45, and the second support rod 44 is fixed in the through holes 452 in the set position. The adjusting nut 453 is releasably fastened. The upper portion of the third fixing member 45 is provided with a bracket 46 for releasably fixing the welding torch fixing member to be described later. The bracket 46 is provided with a fastening bolt 461. The torch fixing member 47 for actually fixing the welding torch is fixed to the fastening bolt 461 of the bracket 46 so as to be releasable. The torch fixing member 47 is provided with a fastening hole 471 to be fixed to the fastening bolt 461 of the bracket 46. On the other hand, the fixing member 47 is provided with a support 48 for supporting the welding torch T, and the support 48 is a fixing piece 481 for actually attaching the welding torch T detachably. ) Is provided. Of course, the welding torch (T) is connected to the welding machine body (not shown) is configured to receive a welding source such as an arc to perform the actual welding.

Hereinafter, a welding method using a pile automatic welding machine configured as described above and an operation mode thereof will be described in detail.

For example, in order to carry out the foundation work at the construction site, one pile (P) is poured and the other pile (P1) at the top of the pile (P1) with a part of the upper portion of the pile (P) exposed to the outside. When connecting the worker, the operator installs the automatic welding machine on the top of one pile (P).

That is, the operator extrapolates the body 12 of the guide 10 from the upper end of the pile P to use the clamp 18 provided in the through holes 16 formed at regular intervals in the upper and lower portions of the body 12. To fix it. Here, when the adjustment bolt 182 of each clamp 18 is tightened with a tool by using a head exposed to the outside of the body, the adjustment bolt 182 is moved forward by the support nut 181 installed inside the through hole. The fixing piece 184 provided at the tip of the press is in contact with the outer surface of the pile P to complete the fixing of the guide 10. In addition, by using the auxiliary fastening piece 183 in the fully tightened control bolt 182 maintains the fastening relationship between the control bolt 182 and the support nut 181 more firmly and stably.

Thus, in the state which installed the guide 10 in the pile P, the worker installs the carriage 20 rotatably in the guide 10. FIG.

In the state where the worker first arranges the pair of rollers 25 provided on both sides of the lower frame 23 integrally provided in the front plate 21 of the carriage 20 on the lower side of the guide 10, The pair of rollers 24 provided on both sides of the upper frame 22 are coupled to the upper side of the guide 10 so as to enable rolling, and the fastening bolt 223 is inserted into the insertion hole 222 provided in the upper frame 22. By fastening to the upper side of the front plate 21, the carriage 20 is rotatably installed in the guide 10. At this time, each pair of rollers (24; 25) provided on both sides of each frame (22; 23) is installed in the same gradient as the body (12) of the guide (10) of the body (12) of the guide (10) It can be moved smoothly and stably along the upper and lower sides of the circle. Of course, when the carriage 20 is assembled or coupled to the guide 10 in advance, if the guide 10 is installed in the pile P while omitting the above-described process, the carriage 20 may be It can be installed.

Thereafter, the operator checks whether the carriage 20 can be smoothly rotated and then installs the driving unit 30 in the carriage 20.

That is, the operator inserts the drive rod 34 of the actuator 33 provided in the housing 31 through the opening 211 of the front plate 21 of the carriage 20 to guide the pinion 341 to the guide 10. Meshes with the rack 141 formed on the rail 14 of the rail 14 and the actuator 33 is fixed to the opening 211, and is fixed to the front plate 21 using the bolt 311 to drive the drive unit ( 30) is fixed to the carriage 20. Of course, the cable 35 for supplying electric power to the actuator 33 is fixedly held to an appropriate length or tension by using the anchor 36 installed on the upper portion of the housing 31.

Finally, in the state in which the drive unit 30 is installed in the carriage 20, the adjusting device 40 for actually adjusting and installing the position of the welding torch T is mounted.

That is, the operator first inserts the insertion portion 411 of the first fixing member 41 of the adjusting device 40 into the fixing groove 32 formed on the side of the housing 31 of the drive unit 30 and fastening bolt ( 412 to the fastening hole 312 around the fixing groove (32). Thus, the upper end of the pile (P) is provided with an automatic welding machine for welding the upper side of the pile (P) and the lower side of the other pile (PI).

As described above, in the state where the welding machine is installed at the upper end of the pile P1, the worker uses the crane (not shown) to match the lower side of the other pile P1 with the upper side of the pile P, The position of the welding torch T is adjusted using the adjusting device 40 so that the welding torch T is exactly matched to the joint portion.

That is, the worker guides the guide groove of the first fixing member 41 such that the height of the welding torch T coincides with the height of the joint portion where the lower side of the pile P and the upper side of the other pile P1 coincide with each other. After determining the height of the first support rod 42 inserted into the (413) using the adjusting bolt 415 provided in the first fixing member 41 to fix the first support rod 42 in the proper position. At this time, the rack-type teeth 421 formed on the side of the ground support rod 42 helps to finely and accurately adjust the height of the first support rod 42.

Subsequently, the operator moves the third fixing member 45 along the second support rod 44 in the front and rear directions so that the tip of the welding torch T has one pile different from the lower side of the pile P. Adjust the position so that the upper edge of P1) is close to the matching joint.

That is, the operator releases the adjustment bolt 453 of the third fixing member 45, and the end of the welding torch T is connected to the lower edge of the pile P and the upper edge of the other pile P1 coinciding with each other. When the fastening bolts 453 are tightened after moving until they are close to the part, the tip of the fastening bolts 453 is brought into contact with the second support rods 44 and fixed at an appropriate position of the second support rods 44, thereby welding. The torch T is fixed at the correct welding position. Of course, even in this case, the rack-shaped teeth 441 formed on the side of the support rod 44 helps to accurately set the position of the third fixing member 45.

As such, when the welder supplies the welding source to the welding torch T while the welding machine is completely fixed to the pile P, and supplies power to the actuator 33 of the driving unit 30, the welding torch T When a welding source, that is, an arc is provided at the connection portion of the lower side of the pile P and the upper side of the other pile P1 through the tip, the connection portion is melted to start mutual welding. At the same time, the actuator 33 is driven in accordance with a program commanded to the drive unit 30, and when the actuator 33 is driven, the drive rod 34 is rotated, and the pinion provided at the tip of the drive rod 34. 341 moves along the rack 141 of the rail 14 of the guide 10. Accordingly, the carriage 20 to which the drive unit 30 is mounted rotates along the guide 10, and at the same time, the drive unit 30 and the adjusting device 40 rotate the pile P. .

As such, as the adjusting device 40 rotates around the pile P, the front end of the pile P1 and the other side of the pile P1, which are different from the lower end of the pile P, which is followed by the tip of the welding torch T, are formed. By providing the arc continuously at the joint, the joint is continuously welded. At this time, each pair of rollers (24; 25) provided on both sides of each of the frames (22; 23) is installed in the same gradient as the body (12) of the guide (10) of the body (12) of the guide (10) Since it can be moved smoothly and stably along the upper and lower sides, uniform and accurate welding can be performed continuously.

On the other hand, when welding is repeatedly performed several times according to a situation, welding is performed again after completion | finish of welding once, ie, welding of 1 rotation of the carriage 20 or the adjusting device 40. FIG. At this time, the operator may be the first support rod 42 as described above, so that the tip of the welding torch T can be disposed at an appropriate position of the junction of the upper side of the other pile (P1) and the lower side of the pile (P1). And the position of the welding torch T using the third fixing member 45 is adjusted.

Thereafter, the welding torch T and the actuator 33 of the driving unit 30 are operated again to perform a continuous welding operation as described above. After that, of course, welding can be performed again in the same manner.

When welding is completed, the operator releases the adjusting device 40 from the driving unit 30, releases the driving unit 30 from the carrier 20, and then releases the carrier 20 from the guide 10. Thereafter, the clamp 18 provided in the body 12 of the guide 10 is released and separated from the pile P, and then separated through another pile P1 using a crane. Of course, after separating the guide 10 from the pile (P) and left on the ground as it is, it can be quickly used to remove or complete the subsequent connection to another file.

If there is no abnormality after inspecting the welding state in the state that the pile is connected as described above, the type work is continued by hitting the upper end of the other pile P1 in the upper part as in the initial pouring operation.

Therefore, it is possible to perform the pouring work by connecting the upper, middle and lower piles with uniform welding quality by using an automatic welding machine without the need of a welder for connecting piles.

In the embodiment of the present invention, but the connection of the pile for the foundation construction described as an embodiment, the automatic welding machine for the pile connection according to the present invention can automatically weld the water pipe, sewage pipe or common pipe that can be welded to each other. It will be fully understood by those skilled in the art.

As described above, according to the present invention, the pile welding machine according to the present invention can be connected to each other by using an automatic welding machine when connecting a pile to another pile when laying piles for foundation work, so that safety accidents may be prevented even in a harsh working environment. It is possible to prevent, to maintain a uniform and excellent quality of the welding, there is no need for skilled welders, and the welding can be performed at multiple locations at the same time has the effect of reducing the cost.

Claims (6)

In the pile automatic welding machine for connecting a plurality of piles (P; P1) in the pile work for foundation work in an industrial site or construction site, Cylindrical body 12, which is extrapolated to the upper end of the pile (P), the rail (14) is formed integrally protruding from the center outer side of the body 12, the rack 141 is formed on the upper surface, and the rail ( 14 and through holes 16 formed at predetermined intervals in the upper and lower bodies 12, and installed in the respective through holes 16, and fixing the body 12 to the pile P. A guide 10 having a clamp 18 therein; It is movable along the guide 10 from side to side, the front plate 21 having an opening 211 is formed in the center, and is provided on the upper side of the front plate 21 and the upper side of the guide 10 on both sides An upper frame 22 having a roller 24 inserted in a cloudable manner, and a roller 25 fixed to a lower portion of the front plate 21 and inserted in a lower side of the guide 20 on both sides in a cloudable manner; Carriage 20 having a lower frame 23 having a; A housing 31 detachably mounted to the carriage 20 and having a fixing groove 32 formed at a side thereof, and embedded in the housing 31 and inserted into the opening 211 of the carriage 20. An actuator 33 for moving the 20 and a pinion rotatably installed in the actuator 33 and movably engaged with the rack 141 formed at the rail 14 of the guide 10 at an end thereof. A drive unit 30 having a drive rod 34 having a 341 formed thereon; And A first fixing member 41 fixed to the fixing groove 32 of the housing 31 of the drive unit 30 and a first supporting rod fixed to the first fixing member 41 so as to be movable up and down ( 42, a second fixing member 43 fixed to the upper end of the first support rod 42, a second support rod 44 having one end fixed to the second fixing member 43, and the first The third fixing member 45, which is movably fixed to the support rod 44, the bracket 46 installed on the upper portion of the third fixing member 45, and the bracket 46 are detachably mounted. And an adjusting device 40 having a torch fixing member 47 to which the support 48 to which the welding torch T connected to the welding source is fixed is vertically fixed. . 2. The support nut 181 of claim 1, wherein the clamp 18 penetrates the support nut 181 installed inside the through hole 16 of the body 12 and the support nut 181. Adjusting bolt 182 is screwed to, and the automatic welding machine for pile connection characterized in that it is composed of a fixing piece (183) is provided at the front end of the control bolt 182 and supported in contact with the pile (P). According to claim 1, wherein each pair of rollers (24; 25) provided on both sides of the upper frame (22) and the lower frame (23) and the gradient of the body 12 of the guide 10 for smooth rolling Automatic welding machine for pile connection, characterized in that installed on the same gradient (C). According to claim 1, The upper frame 22 is detachably assembled to the upper side of the front plate 21, The upper frame 22 is formed with an insertion hole 222, the insertion hole 222 ) Has a fastening bolt 223 for releasably installing the upper frame 23 on the upper side of the front plate 21, automatic welding machine for pile connection. According to claim 1, The first fixing member 41 of the adjusting device 40 is provided with an insertion portion 411 that is inserted into the fixing groove 32 of the housing 31 of the drive unit 30, A fastening bolt 412 for fastening the first fixing member 41 is provided on the side of the insertion part 411 so as to be fastened, and the first support rod 42 is attached to the first fixing member 41. Automatic welder for connecting the file, characterized in that the vertical guide groove 413 is formed to be movable. According to claim 1 or 5, A plurality of through holes 414 communicating with the guide groove 413 is drilled in the side portion of the first fixing member 41, The through holes 414 in the first The adjusting bolt 415 for fixing the support rod 42 to the set position is releasably fastened, and a rack-type tooth 421 is formed at the side of the first support rod 42 in the longitudinal direction. A fixing groove 433 is formed at one side of the second fixing member 43 to be detachably fixed to the second support rod 44, and the fixing groove 433 is formed at an upper end of the second fixing member 43. The adjusting bolt 434 for fastening the second support rod 44 to be inserted and fixed is fastened and loosened, and the second support rod 44 has the correct movement of the third fixing member 45. The rack-shaped teeth 441 are formed along the longitudinal direction, and the third fixing member 45 is inserted into the second support rod 44. A guide groove 451 is formed, and a plurality of through holes 452 communicating with the guide groove 451 is drilled in the side portion of the third fixing member 45, and the second holes are formed in the through holes 452. The adjustment nut 453 for fixing the support rod 44 to the set position is releasably fastened, and the fastening bolt 461 for releasably mounting the welding torch fixing member 47 to the bracket 46. Automatic welding machine for pile connection, characterized in that is provided.

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