JPS5929822Y2 - Welding restraint jig - Google Patents

Description

[Detailed description of the invention] The present invention is a welding restraint jig consisting of an upper surface plate and a lower surface plate that restrains the material to be welded during welding. The present invention relates to a restraint jig for welding that can be performed efficiently.

In welding work, welding restraint jigs are often used to prevent deformation caused by welding, and welding restraint jigs for butting flat plates to restrain flat plates when welding are conventionally Structures as shown in FIGS. 1, 2, and 3 are used.

Fig. 1 is a side view, Fig. 2 is a plan view, and Fig. 3 is a front view. , 3' are the materials to be welded 2, 2'
The materials to be welded 2 and 2' are placed on top of the upper surface plate 1.
, 1', which directly presses down the welded materials 2, 2' when tightening them; 4 supports the welded materials 2.7 from below when tightening the welded materials 2, 2'; Board 1゜1'
It is also a lower surface plate that restrains the materials to be welded 2, 2'.

5.5' is a copper backing plate which is provided facing the lower surface plate 4 with a predetermined gap therebetween, and on which the welding side ends of the welding materials 2, 2' are placed. Gold 6 is a copper pipe having an inert gas blow-off hole which is provided at the lower part of the gap between the copper backing metal 5 and the joint, and which sprays inert gas onto the lower surface of the welding part of the welded materials 2, 2' during welding; 1' is inserted into a through hole drilled through the upper surface plates 1, 1' and the holding plates 3, 3', and its tip is screwed into a female thread provided in the through hole of the lower surface plate 40. Bolt, 8. &' is a bolt that is screwed into a female thread provided in a through hole in the center of the upper surface plates 1, 1' (16 places in the drawing) and presses down the holding plates 3, 3' toward the lower surface plate 4. .

With the conventional welding restraint jig having such a structure, the workpiece 2,
The following procedure is used to constrain 2'.

(1) The material to be welded 2. Place the material to be welded 2. The respective ends of the welding side of z are placed on the copper backing metals 5, 5, and the respective tips are brought into abutment between the copper backing metals 5 and 5'.

(2) Place the presser plate 3 on the material to be welded 2, and then place the upper surface plate 1 on top of it, and then insert the bolts 7 into the through holes at both ends of the upper surface plate 1 and the presser plate 30. The tip is screwed into the female thread of the lower surface plate 4, and the bolt 7 is lightly tightened to the extent that the material to be welded 2 moves when struck with a hammer.

(3) Next, place the holding plate 3' and the upper surface plate 1' on the workpiece 7 to be welded, and tighten them lightly with the bolts T in the same manner as in the case of placing them 2).

(4) After aligning the abutting surfaces of the materials to be welded 2 and 2' with the center of the gap between the copper backing metals 5 and 5', bolt 7
, 7' are firmly tightened to restrain the materials to be welded 2, 2', and also to tightly connect the upper surface plates 1, 1' and the lower surface plate 4.

(5) By sequentially tightening the pins 8 and 8' screwed into the female screws provided in the through holes in the center of the upper surface plates 1 and 1', and pressing down on the holding plates 3 and 3', the Welding material 2
．． Tightly restrain 7.

Welding is performed after the materials to be welded 2 and 2' are restrained in this way, and after the welding work is completed, the welded materials are taken out by following the above-mentioned restraining procedure in reverse. In order to perform butt welding, the materials to be welded 1, 1
It is necessary to raise and lower the two upper surface plates 1 and 1' twice, once when the welding material is restrained and when the welding material is taken out.
Moreover, each surface plate 1°1' is quite heavy, weighing approximately 15 kg, so raising and lowering it requires considerable effort and is inefficient, resulting in low productivity. In addition, in terms of safety, since the upper surface plates 1 and 1' are independent, there are problems such as falling as a potential danger.

The present invention solves this problem, and the upper surface plate and the lower surface plate, which restrain the material to be welded, are connected by a vertically rotatable column, and the upper surface plate is moved by the rotation of the column. A stopper that moves above the lower surface plate and stops the rotation of the column in order to stop the upper surface plate at a predetermined position is provided on the lower surface plate, and the upper and lower surface plates are stopped at a predetermined position. Sufficient clearance is created between the upper and lower surface plates to allow the material to be welded and the holding plate to be taken in and out, and a space is maintained between the upper and lower surface plates, allowing the upper surface plate to be lowered from above the lower surface plate to the work platform. It is an object of the present invention to provide a welding restraint jig that can efficiently perform restraint and release without the need for restraint, and is also excellent in terms of safety.

More specifically, in the present invention, each end of the support is rotatably attached to each side of an upper surface plate and a lower surface plate, which restrain the material to be welded during welding, by a fulcrum, so that the upper surface plate and the lower surface plate are connected to each other. The columns are connected to each other, and each column rotates around a fulcrum attached to the lower surface plate, and there are stoppers on both sides of the lower surface plate that stop the columns rotating in the opposite direction to the center of the lower surface plate at a predetermined position. The material to be welded and the material to be welded are installed between the upper surface plate and the lower surface plate, which are protruded from the upper surface plate and the lower surface plate, which move in the opposite direction to the center of the lower surface plate and stop at a predetermined position due to the rotation of each support. The present invention relates to a welding restraint jig characterized by having a structure in which a space is created between an upper surface plate and a lower surface plate by creating a gap through which a presser plate can be inserted and removed.

Hereinafter, the welding restraint jig according to the present invention will be explained in detail with reference to the drawings.

Fig. 4 is a side view showing one embodiment of the welding restraint jig according to the present invention, Fig. 5 is a front view thereof, and Fig. 6 is an embodiment of the strut of the welding restraint jig according to the present invention. FIG.

In the drawing, 1 and 1' are the materials to be welded 2. The upper surface plates 3 and 3' that tighten Z from above are placed on the materials to be welded 2 and 2', respectively, and are used when tightening the materials 2 and 2' to be welded through the upper surface plate 1°1'. A holding plate 4 directly presses down the welded materials 2, 2', and 4 is used to hold down the welded materials 2, 2' when tightening the welded materials 2, 2'.
, 2' from below and restrains the materials to be welded 2, 7 together with the upper surface plates 1, 1'.

Copper backings 5 and 5' are provided facing each other with a predetermined gap at approximately the center of the lower surface plate 4, and the respective welding side ends of the welding materials 2 and 2' are placed thereon. Reference numeral 6 denotes a copper pipe having an inert gas jetting hole which is provided at the lower part of the gap between the copper backing metals 5 and 5' and sprays inert gas to the welding parts of the welded materials 2 and 2' during welding. 7. T is a bolt that is inserted into a through hole drilled through the upper surface plates 1, 1' and the holding plates 3, 3', and whose tip end is screwed into a female thread provided in the through hole of the lower surface plate 40. , 8, 8' are screwed into female threads provided in the through holes in the center portions of the upper surface plates 1, 1' (eight holes in the illustrated embodiment), and are screwed into the retaining plates 3, 3' toward the lower surface plate 4. This is a bolt to hold it down.

The upper surface plates 1, 1' are rotatably attached at both ends to both sides of the upper surface plates 1, 1' and the lower surface plate 4, respectively.
The columns 10, 10', and 11.11' connecting the upper and lower surface plates 4 to each other are attached or fixed to both sides of the upper and lower surface plates 1, 1' and the lower surface plate 4 to connect the columns 9, 9'. For example, it is a fulcrum that supports rotatably, and is screwed into female threads drilled on both sides of the upper surface plate 1゜1' and the lower surface plate 4, so that both ends of the columns 9 and 9' are supported on the upper surface plate 1. .1' and lower surface plate 4
Any bolts that are connected to each other will suffice.

In the illustrated embodiment, a plurality of pillars 9° are attached at predetermined intervals, and rotate around a fulcrum 11° 11' attached to the lower surface plate 4.
, 9', the upper surface plates 1 and 11 move to the left and right above the lower surface plate 4, centering on the position where the respective ends of the materials to be welded 2 and 2' meet in the center of the lower surface plate 4. It has a structure.

Reference numerals 12 and 12' designate stoppers projecting from both sides of the lower surface plate 4, and are made of, for example, bolts whose tips are screwed into female threads drilled on both sides of the lower surface plate 40.

These stoppers 12, 12' are connected to the upper surface plate 1 from the end of the lower surface plate 4 when the upper surface plates 1, 1' are moved above the lower surface plate 4.
．． This is to stop the rotation of the columns 9, 9' in order to prevent the columns 9, 9' from falling, and when the upper surface plates 1, 1' are moved toward the center of the lower surface plate 4, the columns 9, 9' is in a position where it does not touch the stoppers 12, 12', and when the upper surface plates 1, 1' are moved in the direction opposite to the center of the lower surface plate 4 and opened to the left and right, the support columns 9. They are provided in a protruding position at a position where the support columns 9, 9' are stopped at a position inclined outwardly by 10 to 15 degrees from the vertical direction.

Figure 4 shows the state in which the plate-shaped materials to be welded 2, 2' are restrained by the upper surface plate 1°1' and the lower surface plate 4, and the restraint is released and the upper surface plates 1, 1' are lowered. When the upper surface plates 1, 1' are opened to the left and right by moving in the direction opposite to the center of the plate 4, the state shown by the broken line is obtained, and there is no space between the upper surface plates 1, 1' and the lower surface plate 4 to be welded. An appropriate gap is created that does not hinder the insertion and removal of the materials 2, 2' and the holding plate 3°3', and the struts 9, 9' and stoppers 12,
The structure is such that a space is maintained between the upper surface plate 1° 1' and the lower surface plate 4 by 12'.

Also, the supporting points 10°10' and 11 at both ends of the struts 9 and 9'
, 11' are circular in Fig. 4, but if the thickness of the welded materials 2, 2' varies, the mounting holes for inserting the supports 9, 9' may be used as shown in Fig. 6. If the mounting hole into which the fulcrum 10.10' that connects the plates 1 and 1' is inserted is made into a long hole, the gap between the upper surface plate 1°1' and the lower surface plate 4 can be adjusted. Therefore, it is possible to cope with variations in the plate thickness of the materials to be welded 2, 2'.

In addition, pillars 9, 9', fulcrums 10, 10', 11, 11'
And the stoppers 12 and 12' are attached to the upper surface plates 1 and 1 for strength reasons.
It is made of a material that can sufficiently withstand the weight of .

In order to restrain the materials to be welded 2, 2' with the welding restraint jig according to the present invention having such a structure, move the upper surface plate 1.1' in the direction opposite to the center of the lower surface plate 4 and move it from side to side. With the upper surface plates 1, 1' and the lower surface plate 4 in the open state, insert the materials 2, 2' to be welded into the gaps created between the upper surface plates 1, 1' and the lower surface plate 4, and place the materials 2, 2' on the lower surface plate 4. ′, and place the ends of the welding side of the workpieces 2 and 2′ on the copper backing metals 5 and 5′, and the respective tips are placed between the copper backing metals 5 and 5′. After aligning the upper surface plates 1, 1' and the lower surface plate 4, insert the presser plate 3゜3' onto the workpieces 2, 2' to be welded. ′, rotate the support 9 to move the upper surface plate 1 toward the center of the lower surface plate 4, and insert the bolts 7 into the through holes at both ends of the upper surface plate 1 and the holding plate 30. The tip end is screwed onto the female thread of the lower surface plate 40, and the bolt 7 is lightly tightened to the extent that the workpiece 2 to be welded moves when struck with a hammer.

Next, by the same operation as above, rotate the support 9' to move the upper surface plate 1' toward the center of the lower surface plate 4, and insert bolts into the through holes at both ends of the upper surface plate 11 and the holding plate 3'. 7', screw its tip onto the lower surface plate 40 female screw, and lightly tighten the bolt 7'.

Next, the butt surfaces of the materials to be welded 2 and 2' are precisely aligned with the copper backing 5.
Align it with the center of the gap between and 5', then pol) 7
, 7' are firmly tightened to restrain the materials to be welded 2, 2/, and the upper surface plates 1, 1' and the lower surface plate 4 are tightly connected. The materials to be welded 2, 2' are firmly restrained by sequentially tightening the pins 8 and 8' screwed onto the female threads of the welding plates 3 and 3', and pressing the holding plates 3 and 3' toward the lower surface plate 4. It is.

Welding is performed after restraining the materials 2 and 2' to be welded in this way, and after welding work is completed, loosen the bolts 8 and 8' and tighten the bolts. , 7', and then release the tightening of the upper surface plates 1, 1', and then rotate the columns 9, 9' in the opposite direction to the center of the lower surface plate 4, and rotate the upper surface plates 1, 1'. When moved and opened to the left and right, the columns 9 and 9' hit the stoppers 12 and 12' and stop rotating, so the upper surface plates 1 and 1' are stopped at a predetermined position, and the upper surface plates 1 and 1 Since there is a gap between the holding plates 3 and 3' and the lower surface plate 4, the welded material is removed after the holding plates 3 and 3' are removed.

In this way, when restraining the materials to be welded 2, 2' and when taking out the welded materials, the upper surface plates 1, 1' can be moved left and right simply by rotating the supports 9, 9'. This eliminates the need for lifting and lowering the heavy upper surface plates 1, 1', making it more efficient, and the upper surface plates 1, 1' stop at a predetermined position during movement, so they do not fall, making it safer. Moreover, by appropriately selecting the shape and material of the supports 9, 9', it is possible to restrain even the thick plates 2, 2' to be welded, and even the heavier upper surface plates 1, 1' can be moved. It is possible to force it.

As detailed above, in the welding restraint jig according to the present invention, the upper surface plate 1゜1' and the lower surface plate 4, which restrain the materials to be welded 2 and 2' during welding, are connected by the supports 9 and 9'. 9.
? When the upper surface plates 1, 1' move above the lower surface plate 4 due to the rotation of , and are stopped by the stoppers 12, 12' at a predetermined position, there is a space between the upper surface plate 1°1' and the lower surface plate. is the material to be welded 2. Since a gap is created through which the material to be welded 2.z and the holding plate 3.3' can be inserted and removed, When restraining and releasing z, the materials to be welded 2, 2' and the holding plates 3, 3' can be taken in and out from this gap. (1) Raise and lower the heavy upper surface plates 1, 1' onto the work platform. There is no need to operate, and the welded materials 2, 2' can be restrained and released efficiently.

(2) Even thick materials to be welded 2 and 7 can be restrained,
Further, even heavier upper surface plates 1 and 1' can be easily moved.

(3) Since the upper surface plates 1, 1' and the lower surface plate 4 are connected by the supports 9, 9', the potential danger of the upper surface plates 1, 1' falling is eliminated. Work can be carried out safely.

It has various excellent advantages such as, butt welding of flat plates, etc. can be carried out safely, and its practical value is great.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional welding restraint jig, Fig. 2 is a plan view thereof, Fig. 3 is a front view thereof, and Fig. 4 is a side view showing one embodiment of a welding restraint jig according to the present invention. FIG. 5 is a front view of the same, and FIG. 6 is a side view showing one embodiment of the support of the welding restraint jig according to the present invention. 1.1'... Upper surface plate, 2,2'... Material to be welded, 3゜3'... Holding plate, 4...
Lower surface plate, 5, 51... Copper backing metal, 6...
・Copper pipe, 1,7′... Bolt, 8,8′・
...Bolt, 9, 9'... Prop, 10,
10'...Fulcrum, i i, i 1'...
...Fully point, 12,12'...Stopper.

Claims (1)

[Claims for Utility Model Registration] 1. Upper surface plate 1゜1' that restrains the materials to be welded 2 and 7 during welding.
Both ends of the struts 9°γ are rotatably attached to both sides of the lower surface plate 4 through fulcrums 10, 10' and 11, 11', so that the upper surface plate 1°1' and the lower surface plate 4 are connected to each other. The support columns 9°γ rotate around the fulcrums 11 and 11' attached to the lower surface plate 4, and the lower surface plate 4
Stoppers 12 and 12' are provided on both sides of the lower surface plate 40 to stop the pillars 9 and 9' rotating in the opposite direction to the central part of the lower surface plate 40 at predetermined positions. Materials to be welded 2, 2' are placed between the upper surface plates 1, 1' and the lower surface plate 4, which have moved in the opposite direction to the center of the plate and stopped at a predetermined position.
and a structure in which a space is created between the upper surface plates 1, 1' and the lower surface plate 4 by creating a gap through which the presser plates 3, 3' that press down the materials 2, 7 to be welded can be inserted and removed. Restraint jig for welding. 2 Pillar 9. The welding restraining jig 3 according to claim 1 of the registered utility model, in which a plurality of rods are attached at predetermined intervals, respectively. Utility model registration claim No. 1, which is protrudingly provided at a position where it is stopped at a position tilted outward at an angle of 10 to 15 degrees.
The welding restraint jig according to item 1 or 2. 4 Pillar 9. Support points 10, 10' and 11 at both ends of ff
, 11', the welding restraint jig according to any one of claims 1 to 3, wherein the mounting hole into which the welding member is inserted is circular. 5. Any of the claims 1 to 3 for utility model registration, in which the mounting holes into which the fulcrums 10 and 10' of the support 92g are inserted are long holes, and the mounting holes into which the fulcrums 11 and 11' are inserted are circular. The welding restraining jig according to item 1.