JP2005334916A - Welding device for steel pipe pile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a welding device for steel pipe piles which is excellent in flexibility and capable of welding the steel pipe piles of various outer diameters by one device. <P>SOLUTION: In the welding device 1 for steel pipe piles, a freely detachable annular guide rail 2 is mounted on an outer circumferential face close to the joint portion Ka between steel pipe piles K1 and K2 which are vertically joined. There is provided a self-advancing stand 3 which travels by itself with a wheel 3d along the guide rail 2. The self-advancing stand 3 is fitted with a welder 4 facing the joint portion Ka so that the joint portion Ka can be welded continuously by means of the welder 4 traveling along the guide rail 2. An auxiliary stand 3a equipped with a wheel 3d is mounted on the self-advancing stand 3 so that the rotation axes of the respective wheels 3d intersect on the welding side, and the self-advancing stand 3 and the auxiliary stand 3a are linked by a coupling 3c so that the intersection angle θ is changeable. The self-advancing stand 3 can travel along the guide rail 2 having curvatures matching with the steel pipe piles of different diameters by changing the intersection angle θ. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a welding apparatus that mechanically welds a joint portion of a steel pipe pile that is joined up and down.

  Conventionally, Patent Document 1 discloses a welding apparatus that mechanically welds a joint portion of a steel pipe pile joined up and down. This technology consists of a guide ring installed in the vicinity of the pile head weld and a self-propelled welder installed on the guide ring, while supporting the welding rod at a predetermined position on the self-propelled welder. By providing a feeding means and an electric welding means, the self-propelled welding machine is moved around the pile head in the vicinity of the pile head so that uniform automatic welding can be performed at all times without depending on human power.

By the way, in the said technique, the flame | frame which pivotally supports a wheel is previously bent to the angle match | combined with the curvature of the guide ring so that a self-propelled welding machine can self-run the guide ring smoothly. Therefore, welding of steel pipe piles with different outer diameters uses a dedicated guide ring with a curvature matched to the diameter, so a self-propelled welding machine with a frame bent according to the curvature must be prepared separately. However, there was a problem of inferior versatility.
JP-A-8-281383

  The problem to be solved by the present invention is to provide a steel pipe pile welding apparatus with excellent versatility that can solve these conventional problems and can weld various types of steel pipe piles with different outer diameters. is there.

The configuration of the present invention that solves this problem is as follows.
1) An annular guide rail that is detachably attached to the outer peripheral surface in the vicinity of the joint part of the steel pipe pile that is joined up and down is provided, and a self-propelled stand that self-propels by a wheel along the guide rail is provided. A steel pipe pile welding apparatus in which a welder is mounted toward a joint portion of a steel pipe pile, and the joint portion of the steel pipe pile can be continuously welded while turning along a guide rail with the welder. An auxiliary body with wheels is provided so that the rotation axis of each wheel crosses on the welding side, and the self-propelled base and the auxiliary body are connected to each other so that the crossing angle can be changed by a connecting tool, and the crossing angle is changed. Steel pipe pile welding equipment characterized by being able to self-propelled along a guide rail with a curvature adapted to steel pipe piles of different diameters 2) Guide rail by suspending the welding machine below the self-propelled platform The lower joint can be welded 1) Steel pipe pile welding device described in 1) The self-propelled pedestal is made of steel, a magnet is provided at the base end of the welder, and the welder is magnetically attached to the self-propelled pedestal with the same magnet 1) Or the welding apparatus 4 of the steel pipe pile as described in 2) The said 1) -3 which provided the supporting roller which touches the outer peripheral surface under the guide rail of a steel pipe pile and supports the attitude | position of a self-propelled base below the wheel of a self-propelled base. ) The steel pipe pile welding device 5 according to any one of the above 1) to 4), wherein the guide rail has a structure in which arc-shaped divided rails divided into two bodies are connected to each other so as to be formed into a ring shape by a connecting tool. It is in welding equipment for steel pipe piles.

  According to the present invention, since the auxiliary body provided with the wheels is connected to the self-propelled gantry for turning the welding machine so that the crossing angle of the rotation axis of each wheel can be changed, the crossing angle is changed to change the guide rails having different curvatures. By making it self-propelled, it is possible to weld steel pipe piles of various outer diameters with one unit, and it becomes a welding device with excellent versatility.

  The auxiliary body of the present invention may have a shape similar to a self-propelled gantry or a simple structure in which a wheel is pivotally supported on a stay. Generally, the welding machine is fixed to the upper surface of the self-propelled stand. However, if the structure is suspended from the lower surface of the self-propelled stand, the welding position is below and the guide rail mounting position and the self-propelled stand turn Even when space cannot be secured, welding is possible. Further, it is preferable that the self-propelled pedestal is made of steel and a magnet is provided at the base end portion of the welding machine, so that the welding machine can be detachably attached to the self-propelled pedestal with the magnet so that the welding interval can be easily adjusted.

  If a support roller that supports the posture of the self-propelled gantry in contact with the outer peripheral surface of the steel pipe pile below the guide rail is provided below the wheels of the self-propelled gantry, the balance is maintained and the turn is stabilized. It is desirable that the guide rail has a structure in which arc-shaped divided rails divided into two bodies are connected to each other so as to be formed into a ring shape by a connecting tool, and facilitates attachment to and removal from the steel pipe pile. Also, any welding machine such as gas or arc is selected. Embodiments of the present invention will be specifically described below with reference to the drawings.

  1 is a side view of the welding apparatus of the embodiment, FIG. 2 is a plan view of the welding apparatus of the embodiment, FIG. 3 is a perspective view of the welding machine of the embodiment, FIG. 4 is an explanatory view of the guide rail of the embodiment, and FIG. FIG. 6 is an explanatory view showing wheels of the embodiment, and FIG. 6 is an explanatory view showing turning of the self-propelled gantry of the embodiment.

  The welding apparatus 1 according to the present embodiment attaches an annular guide rail 2 to an outer peripheral surface in the vicinity of the joint portion Ka of the steel pipe piles K1 and K2 that are vertically joined, and is self-propelled along the guide rail 2. A self-propelled gantry 3 is provided, and a welding machine 4 is attached to the self-propelled gantry 3 so as to face the joint portion Ka so that the joint portion Ka can be continuously welded while turning along the guide rail 2 with the welding machine 4. Yes.

  The guide rail 2 is formed to have a curvature matching the diameter of the steel pipe piles K1, K2, and the ends of the arc-shaped divided rails 2a divided into two bodies are connected to each other so as to be formed in an annular shape by a connecting tool 2b made of a hinge, A hook 2c is formed on one split rail 2a, and a clamp 2d that engages with the hook 2c and holds an annular shape is attached to the other split rail 2a.

  A self-propelled pedestal 3 is formed with a steel mounting base 3b to which the welding machine 4 is attached, and an auxiliary body 3a is rotatably connected to the self-propelled pedestal 3 with a connecting tool 3c made of a hinge. Wheels 3d made of pulleys that run on the guide rails 2 are attached to the body 3a, motors 3e with inverters that drive one of the wheels 3d are attached, and the lower part of the self-propelled platform 3 is in contact with the outer surface of the steel pipe pile K1. A supporting roller 3g for holding the posture is attached. 3f is a holder for holding the crossing angle θ of the rotation axis of each axle 3d, and 3h is an O-ring for preventing slipping during traveling.

  The welding machine 4 inserts a socket 4c having two holes into a support column 4b having a cylindrical magnet 4a at the lower end portion through one of the holes, and attaches the socket 4e to the other end of the socket 4c. The provided support rod 4d is inserted, and a welding torch 4f for automatically supplying the welding wire 4g to the socket 4e of the support rod 4d is inserted.

  In this embodiment, after placing the steel pipe pile K1 with the contact pipe Kb welded to the pile head in advance on the ground G, the steel pipe pile K2 having the same diameter is inserted into the contact pipe Kb, and the formed joint portion Ka is formed below. A cradle 2e made of a magnet is magnetically attached to the outer peripheral surface of the steel pipe pile K1, and the guide rail 2 is placed on the cradle 2e and is crimped to the steel pipe pile K1 with a clamp 2d.

  The crossing angle θ of the rotation axis of each wheel 3d of the self-propelled gantry 3 and the auxiliary body 3a is fixed with a holder 3f according to the curvature of the guide rail 2, and the recess of each wheel 3d is hung on the upper end of the guide rail 2. At the same time, the lower support roller 3h is brought into contact with the outer peripheral surface of the steel pipe pile K1 to maintain the posture. The magnet 4a of the welding machine 4 is magnetically attached onto the mounting base 3b so that the welding torch 4f faces the steel pipe pile K1, and the vertical and horizontal positions and the welding interval and angle are adjusted.

  Then, a control device (not shown) of the welding apparatus 1 is operated to start welding with the welding machine 4, and simultaneously the motor 3e is operated to turn the self-propelled gantry 3 and the auxiliary body 3a along the guide rail 2 at a constant speed. The joint portion Ka is welded to form a homogeneous bead. When the welding is completed after one round, the motor 3e and the welding machine 4 are automatically stopped to complete the welding.

  Since the present embodiment is configured as described above, the auxiliary body 3a provided with the wheels 3d is connected to the self-propelled gantry 3 for turning the welding machine 4 so that the crossing angle θ of the rotation axis of each wheel 3d can be adjusted. Adjusting the angle θ and allowing the guide rails 2 with different curvatures to run on their own makes it possible to weld steel pipe piles K1 and K2 of various outer diameters with a single unit, making them versatile and easy to carry on site. Device 1 was obtained.

  FIG. 7 shows another example of the welding apparatus of the embodiment. FIG. 7 is a side view of a welding apparatus according to another example of the embodiment. The welding apparatus 1 shown in FIG. 7 is configured such that the mounting base 3b of the self-propelled gantry 3 is formed below the motor 3e so that the welding machine 4 can be fixed in a downward posture. This example is useful when the position of the joint portion Ka is below and the mounting position of the guide rail 2 and the turning space of the self-propelled gantry 3 cannot be secured. Other reference numerals and configurations are the same as those in the embodiment.

  The technology of the present invention is used when welding steel pipe piles having various outer diameters with one unit.

It is a side view of the welding apparatus of an Example. It is a top view of the welding apparatus of an Example. It is a perspective view of the welding apparatus of an Example. It is explanatory drawing of the guide rail of an Example. It is explanatory drawing of the wheel of an Example. It is explanatory drawing which shows turning of the self-propelled mount frame of an Example. It is a side view of the welding apparatus of the other example of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Welding device 2 Guide rail 2a Split rail 2b Connecting tool 2c Hook 2d Clamp 2e Receiving base 3 Self-propelled stand 3a Auxiliary body 3b Mounting base 3c Connecting tool 3d Wheel 3e Motor 3f Holding tool 3g Support roller 3h O-ring 4 Welding machine 4a Magnet 4b Post 4c Socket 4d Support rod 4e Socket 4f Welding torch 4g Welding wire G Ground K1, K2 Steel pipe pile Ka Joint part Kb Contact pipe

Claims (5)

  An annular guide rail that is detachably attached to the outer peripheral surface in the vicinity of the joint part of the steel pipe pile that is joined up and down is provided, and a self-propelled base that self-propels by a wheel along the guide rail is provided. Is attached to the steel pipe pile joint, and the steel pipe pile joint can be continuously welded while turning along the guide rail with a welding machine. By providing the auxiliary body provided so that the rotation axis of each wheel crosses on the welding side, and connecting the self-propelled base and the auxiliary body so that the crossing angle can be changed with a connecting tool, and changing the crossing angle. A steel pipe pile welding apparatus characterized by being capable of self-propelling along a guide rail having a curvature adapted to steel pipe piles having different diameters.   The steel pipe pile welding apparatus according to claim 1, wherein a welding machine is suspended below the self-propelled mount so that the joint portion under the guide rail can be welded.   The steel pipe pile welding device according to claim 1 or 2, wherein the self-propelled pedestal is made of steel, a magnet is provided at a base end portion of the welding machine, and the welding machine is magnetically attached to the self-propelled pedestal with the magnet.   The steel pipe pile welding apparatus according to any one of claims 1 to 3, wherein a support roller is provided below the wheel of the self-propelled frame so as to contact the outer peripheral surface of the steel pipe pile below the guide rail and support the posture of the self-propelled frame.   The steel pipe pile welding apparatus according to any one of claims 1 to 4, wherein the guide rail has a structure in which arc-shaped divided rails divided into two bodies are connected to each other so as to be formed in an annular shape by a connecting tool.

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