JPH08281483A - Device for welding pile and pile - Google Patents

Abstract

PURPOSE: To execute uniform and automatic welding and to specify welding conditions by installing a self-traveling welding machine having a means for letting off a welding rod and electric welding means to an annular body for guiding which encloses the weld zone of pile heads in proximity thereto. CONSTITUTION: The end plates 3, 4 of a upper pile 1 and a lower pile 2 are pressed and a tightening band 7 of the annular body 6 for guiding is mounted on the outer side of a band 5 connected to the end plate 3 of the upper pile 1. This tightening band 7 of the annular body 6 for guiding is longitudinally provided with a guide rail 9 via a connecting part 8. Driving wheels 12 mounted at the machine body 11 of the self-traveling machine 10 are installed at the upper and lower edges of the guide rail 9. The driving wheels 12 rotate and the machine body 11 moves when the circuit of a motor 17 is turned on. Weld metal is then built in the welding groove 39 of the upper and lower end plates 3, 4 by means of a welding wire 25 and welding is thus executed. The position of the welding wire 25 is adjusted by moving a supporting pipe 21 and a shaft rod 23. As a result, the homogeneous welding is efficiently executed without relying on specialized engineers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile-to-pile welding device for automatic electric welding of a pile head and a lower end of the pile.

[0002]

[Techniques of followers] Regarding electric welding of follower piles, a technique of welding a reinforcing bar to a pile head has been proposed (Japanese Patent Laid-Open No. 6-
170535).

[0003]

[Problems to be Solved by the Invention] Since electric welding of the end plate outer periphery between the subordinate pile head and the lower end of the pile was limited to a technician having specialized technology, the welding is required every time the piles are spliced. Therefore, not only must the technician be put on hold, but the work is prone to heavy labor, improving efficiency is difficult, and the quality of welding is good or bad due to individual differences (all cannot be welded best and evenly). There were various problems.

[0004]

SUMMARY OF THE INVENTION However, the present invention solves the above-mentioned problems of the slave by moving the self-propelled welding machine in the vicinity of the welded portion between the pile head and the pile end.

That is, the present invention comprises a guide ring body that can be circumferentially installed near a pile head weld, and a self-propelled welding machine that can be installed on the guide ring body. A welding rod is attached to the self-propelled welding machine. A pile-to-pile welding apparatus comprising means for feeding out while supporting at a predetermined position and electric welding means.

The guide ring is composed of a fixed ring which is fastened and fixed to the end of the pile, and a guide rail which is connected to the outside of the fixed ring. The guide ring is divided into two or one having a hinged portion. The guide rails are vertical rails on which the wheels of the self-propelled welding machine are vertically installed or horizontal rails on which the wheels of the self-propelled welding machine are installed on a flat surface.

Next, the self-propelled welding machine is provided with a drive wheel and a guide wheel, and a slip prevention means is added to the drive wheel.
The electric welding means is a removable electrode rod support.

In the above description, as the welding rod feed, the electric equipment and the like, commercially available products (or known techniques) are used, and in the present invention, especially the point that the self-propelled welding machine is moved around the pile head welding portion. Attention was paid to this point, and for that reason, the guide rail was attached and the self-propelled means of the self-propelled welding machine was modified.

In the above description, the drive wheels and the guide rails of the self-propelled welding machine are considered to prevent slipping (for example, rack and pinion, rubber or chain). Further, in order to prevent double welding, rotation control of drive wheels or stoppers are used to prevent the self-propelled welding machine from moving the pile more than once.

[0010]

According to the present invention, since the self-propelled welding machine is moved around in the vicinity of the pile head, uniform automatic welding can be always performed without depending on human power. Since the welding conditions can be kept constant, the reliability of the welding strength can be improved.

[0011]

[Example] The end plates 3 and 4 of the upper pile 1 and the lower pile 2 are brought into contact with each other, and the tightening band 7 of the guide ring 6 is attached to the outer side of the band 5 continuously provided to the end plate 3 of the upper pile 1. Then, the joint flanges 7a, 7a of the tightening band 7 are tightened with bolts and nuts to fix the tightening band 7. In the guide ring body 6, a guide rail 9 is vertically provided on the tightening band 7 via a connecting portion 8. The guide rail 9 is formed concentrically with the tightening band 7 and has an annular shape.

Drive wheels 12 and guide wheels 1 attached to a body 11 of a self-propelled welding machine 10 are provided on the upper and lower edges of the guide rail 9.
3 and 14 are vertically installed (drive wheel 12 and guide wheel 13
Gear 16 is fixed to the shaft 15 of the drive wheel 12, and a gear 18 of a motor 17 is engaged with the gear 16. The variable speed motor 17 is the bracket 1 of the machine body 11.
It is fixed at 9. At the bottom of the body 11, the support shaft 2
One end of 0 is fixed parallel to the axis of the variable speed motor 17, a support pipe 21 is slidably fixed to the other end of the support shaft 20, and a mounting pipe 22 is attached to the support pipe 21. It is provided in a right angle direction, and the shaft rod 23 is inserted and fixed to the mounting pipe 22 so as to be adjustable up and down (tightened by the knob 24), and the guide pipe 26 of the welding wire 25 is fixed to the lower end of the shaft rod 23 via the arm 28. I am doing it. In the figure, 27 is a knob for tightening the support tube 21.

The welding wire 25 is used for the chassis 3 of the self-propelled vehicle 29.
It is paid out from the wire feeding device 32 mounted on 0.
Further, power is sent from the welding device 33 mounted on the self-propelled vehicle 29 through the welding wire 25 and the cord 36. In the figure, 31 is an endless track, 34 is a gas cylinder, 35 is a crane,
Reference numeral 37 is a steering wheel of the self-propelled vehicle.

In the above embodiment, the welding device 33 is turned on.
N. And the circuit of the motor 17 is turned on. Then, the rotation of the motor shaft causes the drive wheels 12 to rotate via the gears 43, 18, 16 and the machine body 11 to move in the direction of the arrow 38 in FIG. 2 to weld the upper and lower end plates 3, 4 with the welding wire 25. Molten metal is placed in the groove 39 and welded. In this case, the welding wire 25 is pushed out in the direction of the arrow 40 with an appropriate pressure, and the gap between the welding wire 25 and the welding groove 39 is kept constant regardless of the welding of the end of the welding wire 25. The position of the welding wire 25 in the above is set by loosening the knobs 24 and 27, and
Then, it can be adjusted by moving the shaft rod 23 in the directions of the arrows 41 and 42, respectively.

In this way, just before the welding is completed, the welding is automatically stopped depending on the number of rotations of the stopper or the drive wheel, and the welding is completed.

The guide rail of the above embodiment is shown in FIG.
However, it may be horizontal as shown in FIG. 5 (b).

As shown in FIG. 6A, the guide ring 6 allows the two pieces 6a and 6b to be opened and closed in a hinge shape about the shaft 47, and the other end flange 44 is tightened with a bolt. There are cases where two flanges 45, 46 are fixed as two arc-shaped bodies 6a, 6b to the fastening pile with bolts and nuts as shown in 6 (b), and are appropriately used.

[0018]

According to the present invention, since the self-propelled welding machine is installed on the guide ring fixed to the pile, the welding of the upper pile and the lower pile is automated, and the homogeneity is excellent without relying on a specialist. There is an effect that welding can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a front view in which a part of the embodiment of the present invention is used in a state of being omitted.

FIG. 2 is a partially enlarged plan view of the same.

FIG. 3 is a front view in which a shaft rod is turned downward in FIG. 1 and a part thereof is omitted.

FIG. 4 is a front view of a part of the vehicle, which is also connected to a self-propelled vehicle, in which a part is omitted.

FIG. 5A is an enlarged end view of a part of the guide rail in a longitudinal section. (B) A partially longitudinal enlarged end view of the guide rail of another example.

FIG. 6A is a reduced plan view of the hinge-shaped guide rail. (B) Similarly, a reduced plan view of the split guide rail.

[Explanation of symbols]

 1 Upper pile 2 Lower pile 3, 4 End plate 5 Band 6 Guide ring 7 Clamping band 8 Connecting part 9 Guide rail 10 Self-propelled welding machine 11 Machine body 12 Drive wheel 13, 14 Guide wheel 15 Shaft 16, 18 Gear 17 Variable speed motor 19 Bracket 20 Support shaft 21 Support pipe 22 Mounting pipe 23 Shaft rod 24, 27 Pick 25 Nozzle 26 Guide pipe 28 Arm 29 Self-propelled vehicle 30 Chassis 31 Trackless track 32 Wire feeder 33 Welding device 34 Gas cylinder 35 Crane 36 Code 37 Handle 39 Welding groove 43 Gears 44, 45, 46 Flange 47 Shaft

Claims (5)

[Claims] 1. A guide ring body that can be circumferentially installed near a pile head weld, and a self-propelled welder that can be installed on the guide ring body. A welding rod is placed at a predetermined position on the self-propelled welder. A pile-to-pile welding apparatus comprising: a means for feeding while supporting the pile and an electric welding means. 2. The guide ring is composed of a fixed ring that is fastened and fixed to the end of the pile and a guide rail that is connected to the outside of the fixed ring, and is divided into two or one having a hinged portion. The pile-to-pile welding device according to claim 1, wherein 3. A pile-to-pile welding apparatus, wherein the guide rails are vertical rails on which the wheels of the self-propelled welding machine are vertically installed or horizontal rails on which the wheels of the self-propelled welding machine are installed on a flat surface. . 4. The pile-to-pile welding apparatus according to claim 1, wherein the self-propelled welding machine is provided with drive wheels and guide wheels, and slip prevention means is added to the drive wheels. 5. The pile-to-pile welding apparatus according to claim 1, wherein the electric welding means is a removable electrode rod support.