JPH11350472A - Welding holder, welding holding device and welding method for pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a welding holder, a welding holding device and a welding method for a pile capable of surely welding piles different in diameter and length together. SOLUTION: Three welding holders 1 are provided around a pile 10. Each welding holder 1 is fitted to the tip section of a shaft 4 so that an abutting section 5 is made freely oscillatable. Three welding holders 1 are interlockingly connected together by splines 30. When one of the contact sections 5 of three welding holders 3 is vertically rotated into contact with the barrel face of a first pile 10, the other two contact sections 5 are brought into contact with the barrel face of the first pile 10, and the first pile 10 keeps an erect attitude. A second pile 10' is connected above the fist pile 10, and they are welded together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile holding tool, a welding holding apparatus, and a welding method used for foundation piles of buildings.

[0002]

2. Description of the Related Art A pile used for a foundation pile or the like of a building is generally made of concrete, and a pile is welded and connected at a construction site or the like. In view of this, the present applicant has proposed a pile welding holder and a welding method capable of reliably welding the piles by inserting various lengths and short piles into the casing in a vertical posture (Japanese Patent No. 2684536). Gazette).

As shown in FIG. 1 and FIG. 2, a base 11 mounted on a flange 7 of a casing 6 buried in the ground (symbols are referred to in the same gazette, hereinafter the same). The rotary body 13 is mounted on the inner surface of the rotary body 13, and a contact body 15 is provided at the inner end of the rotary body 13 so as to contact the body surface of the first pile 1 inserted into the casing 6. Therefore, when the first pile 1 is inserted into the casing 6, the contact body 15 comes into contact with the body surface of the first pile 1 from three directions, and the first pile 1 is suspended in a vertical posture. Then, the lower surface of the second pile 2 is grounded to the upper surface of the first pile 1 and welded with the nozzle 4 or the welding rod 5 of the welding machine.
The first pile 1 is pulled straight out of a casing 6 and taken out.

[0004]

The diameter of the pile varies in size. However, the prior art has a problem in that if the diameter of the pile changes, the abutting body must be replaced accordingly, and the handling and management are troublesome. Generally, three abutment members are installed so as to surround the pile and support the pile from three directions.
Since the worker must individually contact and separate the three contact bodies with the pile, handling and work are troublesome.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pile welding holder, a welding holding apparatus, and a welding method capable of easily and surely welding piles having various diameters and various lengths. . It is another object of the present invention to provide a pile welding holder, a welding holding device, and a welding method that are easy and easy to handle and operate.

[0006]

According to the first aspect of the present invention,
A base portion, a shaft rotatably mounted on the base portion in a vertically rotatable manner, and a contact portion attached to a tip portion of the shaft,
A pile welding holder characterized in that the contact portion comprises a plurality of contact members that contact the body surface of the pile, and a holder that holds the contact members in a freely rotatable manner. is there.

According to a second aspect of the present invention, the shaft comprises:
It consists of a pipe axially mounted on the base and a threaded rod screwed into the pipe, the abutting part is attached to the tip of the threaded rod, and the threaded rod is taken in and out of the pipe. Thereby, the contact portion can be moved forward and backward with respect to the pile.

In the invention according to a third aspect, the abutting portion is mounted on the distal end portion of the shaft so as to swing vertically.

According to a fourth aspect of the present invention, the contact member has a contact member made of a plate-like body, and the contact members are provided in multiple stages in the vertical direction.

According to a fifth aspect of the present invention, there is provided a base, a shaft rotatably mounted on the base in a vertically rotatable manner, and a contact part mounted on a tip end of the shaft and abutting against a body surface of the pile. A plurality of interlocking connecting means for interlocking the shafts of a plurality of these welding holders installed around the pile, and providing any one of the plurality of welding holders. When the shaft is rotated in the up-down direction so that the abutment portion contacts or separates from the pile, another shaft is also rotated in the up-down direction by the interlocking connection means. It is a pile holding device for welding.

According to a sixth aspect of the present invention, the shaft comprises:
It consists of a pipe axially mounted on the base and a threaded rod screwed into the pipe, the abutting part is attached to the tip of the threaded rod, and the threaded rod is taken in and out of the pipe. Thereby, the contact portion can be moved forward and backward with respect to the pile.

According to a seventh aspect of the present invention, the abutting portion is mounted on the tip end of the shaft so as to swing vertically.

According to an eighth aspect of the present invention, the abutting portion comprises a plurality of abutting members abutting on the body surface of the pile, and a holding member for holding these abutting members rotatably horizontally.

According to a ninth aspect of the present invention, a pile is welded by joining a lower surface of a second pile upright to an upper surface of a first pile upright and welding a joint between the first pile and the second pile. In the method, a plurality of pile welding holders are disposed around the first pile, and one of the welding holders is attached to a tip end of a shaft of a welding holder. By rotating the shaft around the rotation axis and retracting the contact portion to the outside, the shafts of the other welding holders interlockingly connected by the interlocking connection means are rotated about the rotation axis, and these shafts are rotated. By retracting the contact portions at the distal end outward, and in this state, the first pile is positioned at the center of these contact portions in an upright posture, and then by rotating these contact portions downward, These abutments are brought into contact with the body surface of the first pile. Te first pile held in suspended state, and then the lower surface of the second pile is bonded to the upper surface of the first pile, a welding method of the pile, characterized in that the joint has to be welded.

According to a tenth aspect of the present invention, the first pile is held by a plurality of abutting members mounted on the abutting portion so as to be horizontally rotatable.

According to an eleventh aspect of the present invention, the contact portion is moved forward and backward with respect to the first pile in accordance with the diameter of the first pile, so that the first pile can be moved in the radial direction of the first pile. Adjust the position of the abutment.

[0017]

In the above construction, the first pile is held in an upright posture by bringing the contact portion into contact with the body surface of the first pile,
In this state, the lower surface of the second pile is joined to the upper surface of the first pile, and the joint is welded. In this case, since the plurality of abutting bodies held by the holding body can be freely rotated horizontally, regardless of the diameter of the first pile, the abutting body is firmly abutted on the body surface of the first pile. The first pile can be held in contact therewith.

[0018] Further, by forming interlocking connecting means for interlocking the shafts of the plurality of welding holders with each other, the contact portion of any one of the plurality of welding holders can be connected to the shaft. Is rotated up and down to contact and separate from the first pile, so that the abutting portions of other welding holders also contact and separate from the first pile in conjunction with this, so that the first The pile can be easily and reliably held and released.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view of a pile welding holder, FIG. 2 is a plan view of the same, FIG. 3 is a plan view of the pile welding holding device in use, FIG. 4 is a partially enlarged plan view of the same, and FIG. It is a side view in use.

First, the structure of a pile welding holder will be described with reference to FIGS. This welding holder 1 is
A base 2, a shaft 4 that is rotatably mounted on the base 2 so as to be rotatable in a vertical direction A about a rotation shaft 3, and mounted on a tip end of the shaft 4 so as to be vertically swingable (arrow B). Contact part 5
Consists of As described later, the welding holding device shown in FIG. 3 is configured by interlocking and linking a plurality (preferably three) of the welding holders 1 shown in FIGS. 1 and 2 so as to surround the pile 10. . Reference numeral 7 denotes a cradle on which the platform 2 is mounted.

In FIGS. 1 and 2, the shaft 4 is
It comprises a pipe 11 and a threaded rod 12 which is screwed into and out of the pipe 11. The rear end of the pipe 11 is the rotating shaft 3
The shaft is rotatably mounted in the up and down direction.
Is mounted on the metal fitting 13 at the tip of the screw rod 12 with the pin 6. Therefore, the contact portion 5 is rotatable (vertically swingable) about the pin 6 in the vertical direction B. 8 is the cradle 7
A stopper provided on the upper side, which defines a downward rotation limit of the pipe 11.

Nuts 14 and 15 are screwed to the threaded rod 12. When the screw rod 12 is rotated relative to the pipe 11, the contact portion 5 and the screw rod 12 advance and retreat in the longitudinal direction (radial direction of the pile 10) C. In FIG. 2, the contact portion 5 indicated by a solid line indicates a state of being advanced, and the contact portion 5 indicated by a chain line indicates a state of being retracted. The contact portion 5 advances and retreats according to the diameter of the pile 10 to adjust the position of the pile 10 in the radial direction.

Next, the structure of the contact portion 5 will be described. The contact portion 5 is configured such that two right and left contact members 21 are mounted inside a box-shaped holder 20 in plan view (FIG. 2). Contact body 2
Reference numeral 1 denotes a frame 22 in which a plurality of contact members 23 each formed of a substantially triangular plate are mounted in multiple stages in the vertical direction.
By providing the contact members 23 in multiple stages in the vertical direction, the heavy pile 10 can be firmly held in an upright state.

In FIG. 2, the distal end surface 24 of the contact member 23
Has an arc surface so as to fit the peripheral surface of the pile 10. The contact member 23 is made of an elastic material such as rubber or resin so that the pile 10 is hardly damaged and can be firmly contacted with the pile 10. The frame 22 on which the contact body 21 is mounted is mounted on a vertical rotating shaft 25 provided on the holding body 20 so as to be horizontally rotatable (arrow D). Therefore, as shown in FIG. 4, the contact body 21 is horizontally rotated in the direction of arrow D about the rotation axis 25 according to the diameter of the pile 10, so that the contact body 21 is firmly in contact with the body surface of the pile 10. Thus, the pile 10 can be held. 2
Reference numeral 6 denotes an inverted U-shaped handle mounted on the upper surface of the holder 20 so as to be able to undulate. In FIG. 4, the handle 26 is omitted.

FIG. 3 shows a welding holding device in which a plurality of (three in this embodiment) welding holders 1 having the above-described structure are interlockingly connected. The three welding fixtures 1 are pile 1
The rotating shafts 3 provided on the bases 2 are interlocked via splines 30 and joints 31 and 32. Therefore, when the holding portion 26 of any of the three welding holders 1 is held and the contact portion 5 is moved up and down (arrow E in FIGS. 1 and 5), the shaft 4 becomes The shaft 4 of the other two welding holders 1 rotates in the same direction (arrow A) by the same amount in the vertical direction (arrow A). That is, the spline 30 and the joint portions 31 and 32 are three welding holders 1.
And interlocking connection means for interlocking and connecting the shafts 4. As the interlocking connection means, a flexible shaft or the like can be applied.

In FIG. 5, reference numeral 40 denotes a movable enclosure unit installed at a work site, and an opening 42 is opened in a floor member 41 thereof. The welding holder 1 is disposed around the opening 42, is transported integrally with the surrounding wall unit 40, and is installed at the work site. Reference numeral 8 denotes a casing buried underground, the inside of which is an underground hole 9. The surrounding wall unit 40 may be omitted, and in this case, the welding holder 1 is installed on the ground.

Next, a pile welding method using the welding holder 1 will be described. First, as shown in FIG. 5, the surrounding wall unit 40 is installed at the work site. In this case, the opening 4
2 is aligned with the underground hole 9. In FIG. 5,
For convenience of explanation, the holder 1 for welding is shown in a different position. Next, a working vehicle such as a crane truck (not shown)
The pile 10 is positioned at the center of the three contact portions 5 and is inserted straight into the underground hole 9 in an upright posture (arrow F). At this time, the contact portion 5 is rotated upward and retracted so as to prevent the contact member 23 of the contact portion 5 from hitting the first pile 10 and obstructing its insertion (arrow A1). . FIG.
In FIG. 7, the contact portion 5 indicated by a solid line indicates this retracted state. This rotation operation is performed by an operator lifting one of the handles 26 of the three welding holders 1 by hand.

When the first pile 10 has been inserted into the underground hole 9 to a predetermined depth, the operator releases the handle 26.
Then, the contact portion 5 is moved downward in FIG.
(In two directions), and the contact member 23 of the contact portion 5 contacts the body surface of the first pile 10 as shown by a chain line. In this state, the pile 10 attempts to descend by its own weight. However, when the first pile 10 attempts to descend, the contact member 23 comes into contact with the body surface of the first pile 10 more strongly. The descent is prevented and the first pile 10 is
It will be held firmly in a suspended state inside.

As described above, when the contact portion 5 is rotated in the vertical direction to separate or contact the pile 10, the three welding holders 1 are interlocked by the interlocking connection means such as the spline 30. When the worker holds the handle 26 of any one of the three welding holders 1 and rotates the contact portion 5 in the up-down direction A, the other The contact portions 5 of the two welding holders 1 also move up and down in conjunction with this, and separate or contact with the pile 10. That is, by providing the interlocking connection means, the three contact portions 5 can be simultaneously brought into contact with and separated from the pile 10.
The holding release operation can be performed reliably.

The first pile 10 shown by a chain line in FIG.
Indicates a state of being suspended in the underground hole 9 in this way. The first pile 10 is made of concrete and is extremely heavy. Therefore, in this suspended state, the first pile 10 takes a completely vertical posture due to its own weight. Then, the second pile 10 ′ is positioned on the first pile 10 in an upright posture by a next crane truck or the like, and the lower surface of the second pile 10 ′ is joined to the upper surface of the first pile 10. Then, the joint between the two is welded by a welding machine. In this case, since the welding is performed inside the enclosure unit 40, the welding operation can be easily performed without being affected by the wind. In addition, welding can be safely performed on the flat floor member 41. Conventionally, since welding was performed on the ground with large irregularities, it was difficult to perform various operations such as tripping.

When the welding is completed, the first pile 10
And the second pile 10 ′ is pulled up straight, and the first pile 1 is taken out from the underground hole 9. In this case, in FIG. 5, the contact portion 5 can be freely rotated in the direction of arrow A1, that is, in the direction away from the body surface of the first pile 10, so that the first pile 10 can be taken out of the casing 6 without difficulty. Thus, a series of operations is completed. The first
The pile 10 and the second pile 10 'are handled and transported by a working vehicle such as a crane truck (not shown). In the above operation, the underground hole 9 is formed deeply and the first pile 1
Sufficient gap T between 0 and the bottom of the underground hole 9 (FIG. 5)
Is ensured, it is possible to cope with various piles of long and short lengths.

[0032]

As described above, according to the present invention, the pile can be held in an upright state, and the pile-to-pile welding operation can be performed easily and reliably.

[Brief description of the drawings]

FIG. 1 is a sectional view of a holder for welding a pile.

FIG. 2 is a plan view of a holder for welding a pile;

FIG. 3 is a plan view of the holding device for pile welding during use.

FIG. 4 is a partially enlarged plan view of the pile holding device during use.

FIG. 5 is a side view of the holding device for pile welding during use.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pile welding holder 2 Base part 3 Rotation shaft 4 Shaft 5 Contact part 6 Pin 9 Underground hole 10 Pile 11 Pipe 12 Screw rod 20 Holder 21 Contact body 22 Frame 23 Contact member 25 Rotating shaft 26 Handle 30 splines 31, 32 fittings

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[Procedure amendment]

[Submission date] March 4, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

In FIGS. 1 and 2, the shaft 4 is
It comprises a pipe 11 and a threaded rod 12 which is screwed into and out of the pipe 11. The rear end of the pipe 11 is the rotating shaft 3
Is rotatably solid wear in the vertical direction, also the contact portion 5
Is mounted on the metal fitting 13 at the tip of the screw rod 12 with the pin 6. Therefore, the contact portion 5 is rotatable (vertically swingable) about the pin 6 in the vertical direction B. 8 is the cradle 7
A stopper provided on the upper side, which defines a downward rotation limit of the pipe 11.

Claims (11)

[Claims] 1. A base, a shaft rotatably mounted on the base so as to be rotatable in a vertical direction, and a contact part mounted on a tip end of the shaft, wherein the contact part is a trunk surface of a pile. A pile welding holder, comprising: a plurality of abutting members that abut against the body; and a holding member that holds the abutting members in a horizontally rotatable manner. 2. The shaft comprises: a pipe pivotally mounted on the base; and a threaded rod screwed into the pipe. The contact part is attached to a tip of the threaded rod. The pile welding holder according to claim 1, wherein the contact portion is made to be able to move forward and backward with respect to the pile by taking the pipe into and out of the pipe. 3. The pile holder according to claim 1, wherein the contact portion is attached to a tip portion of the shaft so that the contact portion can swing vertically. 4. The contact member according to claim 1, wherein the contact member has a contact member made of a plate-like body, and the contact members are provided in multiple stages in a vertical direction. Pile welding retainer. 5. A pile welding support comprising: a base, a shaft rotatably mounted on the base in a vertically rotatable manner, and a contact part mounted on a tip end of the shaft and abutting against a body surface of the pile. And an interlocking connection means for interlocking the shafts of a plurality of these welding holders installed around the pile, and providing any one of the plurality of welding holders with an abutting portion. When the shaft is rotated in the vertical direction so as to contact and separate from the pile, the other shafts are also rotated in the vertical direction by the interlocking connection means, thereby holding the pile for welding. apparatus. 6. The shaft comprises a pipe axially mounted on the base and a threaded rod screwed into the pipe, and the abutting portion is attached to the tip of the threaded rod. 6. The pile welding holding device according to claim 5, wherein the contact portion is made to be able to move forward and backward with respect to the pile by taking the pipe into and out of the pipe. 7. The pile welding holding device according to claim 5, wherein the abutting portion is attached to a tip portion of the shaft so as to swing vertically. 8. The contact part comprises a plurality of abutting members that abut against the body surface of the pile, and a holding member that holds the abutting members so as to be horizontally rotatable. 5-7
The pile holding device according to any one of the above. 9. A pile welding method for joining a lower surface of an upright second pile to an upper surface of an upright first pile and welding a joint portion between the first pile and the second pile. A plurality of pile welding holders are provided around the pile, and the shaft is rotated by a contact portion attached to the tip of the shaft of any one of the welding holders. By rotating about the shaft and retracting outward, the shafts of the other welding holders interlockingly connected by the interlocking connection means are rotated about the rotation axis, and the contact portions of the tip portions of these shafts are rotated. The first pile is then retracted outward, and in this state, the first pile is positioned in the center of these abutting portions in an upright posture, and then these abutting portions are rotated downward, so that these abutting portions are moved downward. Hang the first pile in mid-air by abutting it on the torso of the first pile A method for welding a pile, comprising: holding a lower surface of a second pile on an upper surface of a first pile; and welding a joint portion. 10. The pile welding method according to claim 9, wherein the first pile is held by a plurality of abutting members mounted on the abutting portion so as to be horizontally rotatable. 11. The position of the contact portion in the radial direction of the first pile is adjusted by moving the contact portion forward and backward with respect to the first pile in accordance with the diameter of the first pile. The pile welding method according to claim 9, wherein the pile is adjusted.