JPH10216986A - Welding stand for bar member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the man power and time for welding and to achieve high precision welding and improvement of safety by positioning/fixing a bar member to a stand body part, which is openable and has a holding part to hold the mount body rotatable in the circumferential direction and a detention means to deter rotation. SOLUTION: Stand body upper parts of all stands to be placed with a bar member W are opened, the bar member W is placed in the stand body part B by a crane and fixed by closing the stand body upper part and inserting a L shaped pin in an inserting hole of a opening part. The bar member W is fixed by pressing at abutted parts 11 by plural abutting jacks 11b arranged to a member fixing part in the stand body part B. Rotation of the stand body part B is deterred by a detention means F. Two bar members are abutted and parts to be welded are welded. After completing welding of an upper part of part to be welded, by releasing rotation detention of the detention means and rotating the stand body part B, the bar member is rotated. At the position the part to be welded except welded parts comes to an upperside, rotation is deterred and welding is conducted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding base used for welding and connecting rod-like members to be welded, such as long long columns, to be welded.

[0002]

2. Description of the Related Art Generally, when a long rod-like member such as a straight pillar is used, it is necessary to perform welding on site because the length of a member that can be transported is limited. When the rod-shaped members are connected by welding, the rod-shaped members are arranged in series on a horseback-shaped pedestal, a part of a contact portion of the rod-shaped members in contact with each other is first welded, and then the other parts are welded. Therefore, it was necessary to lift it with a crane, rotate it, install it on the gantry again, and perform welding work.

[0003]

However, the prior art has the following problems. (1) In order to complete the welding connection, it is necessary to lift and rotate the bar-shaped member several times with a crane, which requires a great deal of labor and time. (2) Since it is lifted and rotated by a crane before welding is completely completed, welding accuracy is reduced. (3) Since the lifting operation is performed using a wire or the like, there is a danger that the wire may be broken or a hand may be caught at the time of mounting on the gantry.

The present invention has been made in view of the above problems, and reduces the labor and time required for welding and connecting rod-shaped members at a work site or the like, and enables highly accurate welding. Another object of the present invention is to provide a gantry for improving safety when welding and connecting.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a welding frame used for connecting a rod-shaped member by welding. Locking means that is fixed with the part closed,
Positioning and fixing means provided on the inner periphery of the frame for positioning and fixing the rod-shaped member, a holder for rotatably holding the frame in the circumferential direction, and rotation of the frame. And a restraining means for restraining the bar-shaped member.

Further, the frame portion may be constituted by a frame upper portion and a frame lower portion, and the frame upper portion and the frame lower portion may be configured to be openable and closable about a support shaft. Further, the positioning and fixing means may include a guide portion for positioning the rod-shaped member and a member fixing portion for fixing the rod-shaped member. Further, the holding portion, a box portion having a hollow portion into which the frame portion is inserted, and a rotation support portion rotatably supporting the frame portion,
May be provided. Further, in the gantry for welding the rod-shaped member, the gantry may be configured to be movable on a track in the axial direction of the frame portion.

[0007]

Embodiments of the present invention will be described with reference to the drawings. 1 is a schematic front view of the gantry A, and FIG.
FIG. 3 is an enlarged view of the frame portion B (a).
Is a perspective view, (b) and (c) are left and right side views, and FIG.
9 is a schematic enlarged view of FIG. 9, (a) showing a state in which a hook is fixedly connected to an arm, (b) showing a state in which the hook is rotatably supported on the arm, and FIG. FIG. 6 is a schematic perspective view showing a holding portion C including a cross-sectional portion, and FIG.
Is a schematic view showing a state in which the bar-shaped member W is fixed to the gantry A.

In this embodiment, an example in which a cross H steel is used for the bar W will be described. However, the bar W is not limited to the cross H steel. The gantry A is composed of a frame portion B composed of a frame upper portion 1 and a frame lower portion 2, a holding portion C, a locking means D, a positioning fixing means E, and a restraining means F.

First, the frame portion B will be described. FIG. 3 shows a shaft pin 3 in which a frame upper part 1 and a frame lower part 2 are support shafts.
3 shows a state in which it is rotatably supported and can be opened and closed only in one direction. However, the bar-shaped member W may be openable and closable by another method as long as it does not hinder the mounting of the bar-shaped member W. For example, the frame body upper portion 1 may be configured to be openable at both ends, and two support shafts may be provided.

The frame portion B has an outer peripheral circular shape in which the upper frame portion 1 and the lower frame portion 2 are integrated. Further, the upper frame member 1 and the lower frame member 2 are fitted at the opening / closing portion 5, and are locked by an insertion hole 8 formed in the opening / closing portion 5 and an L-shaped pin 10 which is a detachable mounting member. D is formed and fixed by penetrating the L-shaped pin 10 into the insertion hole 8.

Further, the locking portion 10a of the L-shaped pin 10 can be incorporated into the groove 9 formed in the frame portion B,
When the frame portion B rotates, the protrusion of the locking portion 10a does not interfere. In the present embodiment, an example in which the L-shaped pin 10 is used has been described. However, if the opening / closing portion 5 can be fixed, and there is no problem in rotating the frame portion B, the locking means D can be replaced by another method. Good.

On the inner periphery of the integrated frame portion B, a positioning fixing means E comprising a guide portion 12 and a member fixing portion 11 and a cylindrical shape which is an engaging portion when the frame upper portion 1 is lifted. A part 4 is formed. That is, a guide portion 12 for positioning the rod-shaped member W is provided on the inner periphery of the frame body lower portion 2,
It can be placed and positioned according to the shape of the rod-shaped member W. Further, on the other inner periphery of the frame portion B, a contact portion 11a for contacting and fixing the rod-shaped member W to be welded from a plurality of places according to the shape, and a contact jack for pressing the contact portion 11a. The contact fixing portion 11 is constituted by the contact portion 11a and the contact jack 11b.

A holding portion C in which the frame portion B is rotatably held.
As shown in FIG. 5, the box body 6 has a hollow portion 6a into which the frame portion B is inserted, and a roller 7 serving as a rotation support portion provided in the hollow portion 6a. Roller 7
Are rotatably mounted along the outer circumference of the frame B to be inserted in order to support the frame B and support the rotation. Incidentally, the dotted line in FIG. 5 is a virtual diagram in which the frame portion B is inserted into the holding portion C.

The frame portion B may be formed in a gear shape having teeth on the outer periphery, and the roller 7 may be formed in a gear shape meshing with the teeth. In this case, for example, the rotation of the roller 7 is controlled.
By operating, the rotation of the frame portion B can also be indirectly operated.

Further, a wheel portion G is formed at the bottom of the box portion 6, and a wheel 16 is rotatably supported by a wheel shaft 17. The wheels 16 are engaged with the rails 21 forming the track, and enable the holding portion C to move in the axial direction of the frame body portion B.

Further, a lifting device H which is an opening / closing means for the frame portion B will be described with reference to FIG. The lifting device H includes an arm portion 18 including three links 18a, 18b, 18c and a pair 18d, 18e rotatably supporting each link.
4A, a hook 19 having one end 19a connected to the link 18c and the other end engaged with the cylindrical portion 4, and a pulling force and a pushing force of the arm portion 18. And a jack portion 20 for giving

Although one end 19a of the hook 19 is connected by a bolt 19c and a nut 19d in the present embodiment, the connection method is not limited to the above-mentioned connection method as long as the structure can withstand opening and closing of the upper frame 1. In addition, a gap 19e is formed so that the engagement portion 19b does not interfere with the rotation of the frame body B when no force is applied by the jack portion 20.

Further, the one end 19a of the hook 19 is not fixed and fixed, and a straight line perpendicular to the rotation axis of the frame B is used as the rotation axis by, for example, a hook shaft pin 19f as shown in FIG. 19a is rotatably supported by the link 18c, and the engaging portion 19b can be lifted with the hook shaft pin 19f as a fulcrum, so that the engagement can be released when the upper frame 1 is not opened or closed. .

The means F for suppressing the rotation of the frame B will be described. The inhibiting means F only needs to be able to inhibit the rotation after the bar-shaped member W is placed in the frame body B. Accordingly, for example, as shown in FIG. 2, the suppression grooves 13 are provided at a plurality of positions of the frame portion B, and the suppression members 15 are provided in the through holes 14 passing through the box body portion 6.
Can be penetrated, and the rotation of the frame body portion B can be suppressed by engaging with the suppression groove 13. Further, when the outer periphery of the frame portion B has a gear shape, the rotation of the frame portion B can also be suppressed by suppressing the rotation of the roller 7. Further, when opening and closing the frame body upper part 1 by using the lifting device H, it is possible to suppress by applying a pulling force of the jack part 20.

The operation of the welding gantry A configured as described above will be described. A plurality of frames A are set on the rail 21 as shown in FIG. The L-shaped pin 10 is pulled out from the insertion hole 8 so that the upper frame 1 and the lower frame 2 can be opened and closed (see FIG. 3). Link 1 is caused by the slider movement of jack portion 20.
8a, the pair 18e acts as a fixed fulcrum, the link 18b and the link 18c move in a leverage, and the hook 19
Is lifted. Then, the engaging portion 19b of the hook portion 19 engages with the cylindrical portion 4 of the upper portion 1 of the frame, and the upper portion 1 of the frame is
Is lifted so that the lid is opened with the fulcrum as a fulcrum (see FIG. 1). The above operation is performed on a plurality of mounts A set on the rails 21 so that the upper frame portions 1 of all the mounts A on which the bar-shaped members W are mounted are kept open.

Next, the bar-shaped member W is placed in the opened frame portion B by a crane (not shown).
The rod-shaped member W is placed on the guide section 12 and positioning is performed. Thereafter, the operation opposite to the operation of opening the frame upper portion 1 is performed, the frame upper portion 1 is closed, and the L-shaped pin 10 is inserted into the insertion hole 8 of the opening / closing portion 5 to fix the frame.

Next, a plurality of abutting jacks 11b provided on the member fixing portion 11 in the frame portion B make the abutting portion 11a
Is pressed to fix the placed bar-shaped member W. further,
The rotation of the frame portion B is suppressed using the suppression means F.

After the fixing and the rotation of the bar-shaped member W have been stopped, the gantry A on the rail is moved to abut the two bar-shaped members W, and the welding portion 22 is welded. FIG. 6 shows this contact state. Further, after the welding of the upper portion of the welded portion 22 shown in FIG. 6 is completed, the rotation suppression by the suppression means F is released, the frame B is rotated, and the rod-shaped member W is rotated. Then, at the position where the welded portion 22 other than the above welded portion comes to the upper portion, the rotation is suppressed again and welding is performed.

[0024]

Since the present invention is constructed as described above, the labor and time required for welding work can be reduced, and high-precision welding can be performed at a work site at the site, and safety can be improved. It has the effect of being able to do so.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a gantry A.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an enlarged view of a frame portion B (a) is a perspective view,
(B) and (c) are left and right side views.

4A and 4B are schematic enlarged views of the hook 19, in which FIG. 4A is a state in which the hook is fixedly connected to an arm, and FIG. 4B is a state in which the hook is rotatably supported by the arm;

FIG. 5 is a schematic perspective view showing a holding portion C partially including an internal cross section.

FIG. 6 is a schematic diagram showing a state where a gantry A is set on a rail 21 and a bar-shaped member W is fixed to the gantry A;

[Explanation of symbols]

 W: rod-shaped member A: gantry B: frame 1: upper frame 2: lower frame 3: shaft pin (supporting shaft) 4: cylindrical portion 5: opening / closing portion C: holding portion 6: box portion 6a : Hollow part 7: roller (rotation support part) D: locking means 8: insertion hole 9: groove part 10: L-shaped pin 10 a: locking part E: positioning fixing means 11: member fixing part 11 a: contact part 11 b: Jack for contact 12: Guide portion F: Suppression means 13: Suppression groove 14: Through hole 15: Suppression member G: Wheel portion 16: Wheel 17: Wheel shaft H: Lifting device 18: Arm portion 18a, 18b, 18c : Link 18d, 18e: Pair 19: Hook 19a: One end 19b: Engagement 19c: Bolt 19d: Nut 19e: Gap 19f: Hook shaft pin 20: Jack 21: Rail 22: Weld

Claims (5)

[Claims] 1. A welding frame used for connecting a rod-shaped member by welding, comprising: an outer peripheral circular frame portion configured to be openable and closable; locking means for fixing the frame portion in a closed state; Positioning and fixing means provided on the inner periphery of the frame for positioning and fixing the rod-shaped member; a holding portion for holding the frame so as to be rotatable in a circumferential direction; and suppressing rotation of the frame. A welding stand for a bar-shaped member, comprising: 2. The frame body portion includes a frame body upper part and a frame body lower part, and the frame body upper part and the frame body lower part are configured to be openable and closable about a support shaft as a fulcrum. A gantry for welding rod-shaped members according to claim 1. 3. The positioning and fixing device according to claim 1, wherein the positioning and fixing means includes a guide portion for positioning the rod-shaped member and a member fixing portion for fixing the rod-shaped member. Stand for welding rod-shaped members. 4. The holding part comprises a box part having a hollow part into which the frame part is inserted, and a rotation support part rotatably supporting the frame part. The welding gantry for rod-shaped members according to any one of claims 1 to 3. 5. The welding stand for the bar-shaped member, wherein the rod-shaped member is configured to be movable on a track in an axial direction of the frame portion. 2. A welding stand for a bar-shaped member according to claim 1.