JPS6142702Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is based on the idea of elastically holding a support frame provided with a center electrode and upper and lower electrode pieces on the lower surface of the mounting frame, and deforming the joint part when joining frame materials, etc.
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a welding tool that can efficiently and accurately weld even when there is warpage and that can improve the efficiency and precision of joining work will be described below with reference to the drawings.

The figure shows the assembly of the welding tool 62 of the present invention to form a framework 2 of a construction panel used as a wall, floor, etc. in a prefabricated building, for example.
The case where the welding device 60 of the welding device 1 is adopted is illustrated, and the frame 2 is a vertical frame made of channel steel, with its groove facing inward, as illustrated in FIG. Between materials 3 and 3, horizontal frame materials 4 and 5
are arranged at both ends with the grooves facing inward, and the two inner frame members 6 and 6 that partition the vertical frame members 3 and 3 are arranged with the grooves facing each other. Frame members 9 and 9 on the side that cross the frame member 3 and the inner frame member 6 and frame members 10 and 11 for openings passing between the inner frame members 6 and 6 are provided, and vertical frame members 3, The inner frame material 6, the side frame material 9, and the opening frame materials 10 and 11 have narrow parts at both ends and are inserted into the grooves of the horizontal frame materials 4 and 5 and the inner frame materials 6 and 6. A temporary framework 13 is formed by mating the male and female parts together, and the joint 14 is welded to complete the framework 2. The welding tool 62 of the present invention is used to form the framework 2. It is used in the welding device 60 of the welding device 1. A U-shaped piece 12 is welded to the outer surface of the frame material 6, and one end of the frame material 9 on the side is fitted into the U-shaped piece 12, and a lip 15 facing outward is attached to the horizontal frame material 5. The positions of the vertical frame members 3, horizontal frame members 4 and 5, and inner frame member 6 that are perforated and form the grid-like body are constant for a construction panel of one standard size. On the other hand, the side frame material 9 and the opening frame material 31
The mounting position of 0 and 11 is variable depending on the type.

The assembly and welding device 1 includes a temporary assembly device 20, a transfer device 40, and a welding device 60 in which a welding tool 62 of the present invention is attached to a welding table 61 in parallel. The temporary assembly device 20 has rails 2 extending toward the transfer device 40.
1 to the original position A of the transfer device 40, a positioning tool 23 and a side support tool 2 are attached.
5.26. The positioning tools 23 are arranged at both end positions of the frame members 3, 4, 5, and 6 at certain positions among the frame members 3 to 11 for forming the framework, and the side support tools 25 and 26 2. Depending on the type of frame material 9 on the side whose position can be changed, frame material 10 for opening.
11, respectively.

As illustrated in FIG. 4, the positioning tool 23 has two pins 27 and 27 erected on the rotating arm 29 with an interval equal to or larger than the width of the frame members 3 to 6. The rotating arm 29 has a support shaft 2 installed below at its center.
9a is vertically pivoted on a bearing stand 30 fixed to the frame 22, while a lever 29b is extended from the support shaft 29a to the side and a rod of a cylinder 31 is pivoted to the tip thereof. The cylinder 31 has a support piece 31 at its rear end.
By attaching it to the frame 22 through a, the rotating arm 29 and therefore the pin 27 can be rotated via the lever 29b as it expands and contracts, and the frame members 3 to 6 inserted between the pins 27 and 27 are the center of rotation. can be positioned and grasped. The pin 27 can be of various shapes as long as it can hold the frame members 3 to 6 therebetween, such as a bent piece formed by bending both ends of the rotating arm 29.
It can also be driven using a rotating machine such as a rotary actuator.

The side abutting tools 25 and 26 are provided with a plurality of abutment pins 3 on a base frame 32, as shown in FIG.
3 are arranged side by side at intervals corresponding to the variable positions of the frame members 9, 10, and 11. The base frame 32 is attached to the frame 22 by leg pieces 32b provided on both sides of a relatively long horizontal piece 32a located at a lower position than the upper surface of the rotating arm 29, and the stopper pin 33 is attached to the lower surface of the horizontal piece 32a. It is inserted into the attached cylinder 34. The cylinder 34 consists of a two-split cylindrical body, and a stopper pin 33 is installed inside the cylinder.
Air chamber 34 in which a piston 35 attached to the lower end slides
a, and by inserting a spring 34b between the piston 35 and the upper end of the air chamber 34a,
While urging the pin 33 downward, the air chamber 34a
By introducing high pressure air from the hose 34d connected to the guide hole 34c on the lower surface, the piston 35,
Therefore, the abutting pin 33 can protrude from the upper surface of the horizontal piece 32a, and the protruding portion of the pin 33 can be brought into contact with one side of the frame members 9, 10, 11 and positioned accordingly. Also, the hose 34d has a stopper pin 3 to be used.
3, high pressure air can be selected and introduced, and therefore only the necessary abutment pins 33 can be operated. In order to position the frame members 10 and 11 together, the side support member 25 has a base frame 32 that is elongated and extends on the inner surfaces of the frame members 6 and parallel to the frame members 6 at both ends thereof. While the abutting pins 33 are provided, the base frames 32 of the side abutting tools 26 are set to have a length that slightly exceeds the variable length range of the side frame members 9.

Therefore, the temporary assembly device 20 includes a positioning tool 23 in which pins 27 and 27 are arranged perpendicularly to the longitudinal axes of the frame members 3 to 6.
Insert both ends of the frame members 3 to 6, respectively. In addition, the inner frame member 6 is so that one side thereof can be brought into contact with the side abutment tool 25 from which a predetermined abutment pin 33 is protruded.
The opening frame members 10 and 11 are positioned by sliding and moving the grooves 6, and one end is inserted into the groove of the vertical frame member 3 by the protruding stopper pin 33 of the side supporter 26, and the other end is inserted into the groove of the vertical frame member 3. Connect the end to the U-shaped piece 12
The frame member 9 supported by the frame member 9 can be positioned, and the rotating arm 29 of the positioning tool 23 can be rotated to grip the frame members 3 to 6. Both ends of a chain 35a that winds a chain wheel 35 that is pivotally supported at both central ends of the rail 21 are fixed to the frame 22 of the temporary assembly device 20, and as the chain wheel 35 rotates, the transfer device 40 is moved as described above. can be moved to its original position A.

As illustrated in FIG.
A lifting tool 39 consisting of a lifting frame 43 and a lifting frame 43 is attached. The running frame 41 has vertical frame members 41b spanning the upper portions of both ends of the side frame members 41a, and the side frame members 41a run on rails 49 that are continuously laid toward the welding table 61. You can move back and forth between the two. The height of the side frame members 41a is relatively large, while the vertical frame members 41b are formed to have a small thickness, so that the vertical frame members 41a are formed in front and rear thereof.
An inlet portion 41c that opens below b is formed. The lifting frame 43 has an L-shape consisting of a vertical piece 43a and a horizontal piece 43b extending inward at its upper end, and the lifting frame 43 has a cylinder 44 vertically fixed to the side frame member 41a. By fixing a projecting piece 45 formed on the back surface of the vertical piece 43a to the rod, the lifting frame 43 can be raised and lowered as the cylinder 44 expands and contracts. The length between the vertical pieces 43a and 43a is set to be larger than the width of the temporary frame assembly 20, so that the temporary frame assembly 20 enters the original position A from the entrance portion 41c and enters the traveling frame 41. It can be located.

The locking arm 42 of the lifting tool 39 is pivoted on a support shaft installed horizontally at the lower end of a bearing piece 46 opposite to the vertical piece 43a, and has a hook portion bent downward into an L-shape at the tip of its base 42a. 42b, and the base portion 42a is connected to a rod of a cylinder 47 which is pivotably supported between the bearing pieces 46, so that the hook portion 42 is formed by the extension of the cylinder 47.
b rotates outward and the pull-down frame 43 is in the lowered position, and its hook portion 42b can be inserted and locked into the groove of the horizontal frame members 4 and 5 of the temporary assembly device 20 that has entered. As the lifting frame 43 rises due to the extension of the cylinder 44, the temporary framework 13 consisting of the frame members 3, 4, 5, 6, 9, 10, and 11 temporarily assembled on the temporary assembly device 20 is pulled up. In addition, when pulling up, the positioning tool 23 reverses its pin 27 to open the frame members 3, 4, and 5, and the moving frame 41
is placed on the rail 49 extending to the welding table 61,
and a chain wheel 50 pivotally supported at the upper and lower ends of the rail 49.
By fixing both ends of the chain 50a wound around the chain 50a, it can reciprocate between the original position A and the welding table 61 as the chain wheel 50 rotates.

In this way, the transfer device 40 is constructed by moving the side frame members 41 of the traveling frame 41 as shown in FIG. 7 with the center omitted.
A lifting frame 43 is attached to the rod end of the cylinder 44 fixed to the inner surface of the cylinder 44, and the upper end of the lifting frame 43 is attached to the rod end of the cylinder 44.
In the lowered state, the frame material 4 on the temporary assembly device 20
5 can be locked by extension of the cylinder 47, and by raising the lifting frame 43, the frame members 4, 5 and thus the temporary framework 13 can be pulled up. As shown by the dashed line in FIG. 7, the inner surface of the lifting frame 43 has frame members 4 and 5
By lightly pressing the back surface of the frame 4 inward, the temporary frame 13 can be formed to prevent it from disassembling during lifting or transportation.
3 is placed close to the frame members 4 and 5 in advance, the lifting frame 43 can be configured to be able to hold the frame members 4 and 5 between it and the hook portion 42b.

The welding table 61 of the welding device 60 includes a positioning gripping tool 63, a positioning tool 64, and a positioning tool 6.
5 and the lifting frame 43 of the transfer device 40.
As shown in FIG. The positioning tool 23 is provided with pins 27 that are erected with an interval of more than 100 degrees, and has a rotary arm 29 that is rotatable by the expansion and contraction of the cylinder 31, and the positioning tool 2
3 and along the frame members 3, 4, 5, and 6.
9 is a receiving part 71 at the upper end of the lifting shaft 70 that is prevented from rotating.
The receiving part 71 has two guide pieces 74, for example, chord-shaped and curved outward, erected on both sides of a bottom piece 73 which is slightly narrower than the gap between the pins 27. The receiving portion 71 is formed in an inverted V shape that becomes wider toward the top. In this embodiment, the elevating shaft 70 is a square shaft rod with an inverted cylinder 76.
The lifting shaft 70 is prevented from rotating by engaging with the housing of the cylinder 76, and
Due to the extension of the bottom piece 73, the upper surface of the bottom piece 73 rises to a height exceeding the upper end of the pin 27, and due to the contraction, the upper surface of the bottom piece 73 sinks below the upper surface of the rotating arm 29, and the receiving part 71 is at the initial position of the rotating arm 29. Match the spacing between pins 27.

The positioning grip 63 is disposed on the workbench 66 and at both ends thereof in accordance with the arrangement of the frame members 3, 4, 5, and 6, and is attached to the receiving portion 71 of the guiding tool 69.
By raising the frame material 3, which is located above,
4, 5, and 6 are placed on the bottom piece 73 while being guided by the guide piece 74, and as they descend, the bottom piece 7
3 is formed to be slightly narrower than the distance between the pins 27, so that it can be inserted correctly between the pins 27 of the positioning tool 23, and can be positioned and gripped at the center by rotation of the rotating arm 29. .

As shown in FIG. 9, the positioning tool 64 is, for example, a slide plate 79 that can move the two positioning tools 23 and 23 back and forth, which has pins 27 implanted at both ends of the upper surface of the rotating arm 29 that can be rotated by a cylinder 31. Attach to. The slide plate 79 is slidably supported on a guide shaft 80 attached to both ends thereof, perpendicular to the opening frame members 10 and 11 on the workbench 66, and the slide plate 79 protrudes from the lower surface thereof. By connecting the mounting piece 81 to the cylinder 83 on the workbench 66, it moves back and forth as the cylinder 83 expands and contracts. A stopper piece 85 is attached to the slide plate 79.
is installed on the side. The corresponding stopper piece 85 has a hanging piece 86 hanging below its tip, and a plurality of adjustment pins 87 protrude from the workbench 66 and abut against the corresponding stopper piece 85 in the direction of movement of the slide plate 79. Installed in parallel. The adjustment pin 87 is made of, for example, a rod of a cylinder 89, and the positioning tool 23 is connected to the frame member 10.1.
They are arranged in advance on the workbench 66 at appropriate intervals so that they can be positioned at one variable mounting position.

Therefore, the positioning tool 64 positions the positioning tool 23 by selecting the cylinder 89 and protruding the adjustment pin 87, so that the abutment pieces 85 of the slide plate 79 abut against each other, and the positioning tool 23 is aligned with the frame members 10 and 11.
can be held in the correct position.

As illustrated in FIG. 10, the position adjustment tool 65 includes tilting arms 92 that tilt symmetrically to each other and can be freely raised and lowered.
The spine piece 93 is arranged directly below the U-shaped piece 12 welded with the groove portion horizontal. The tilting arm 92 is pivotally supported on an upright piece of an L-shaped base 95 with a gap approximately equal to that of the U-shaped piece 12, and gears 97 and 9 are mounted on the pivot arm 92.
Fix 7. A gear 97 is disposed therebetween and meshes with a rack 99 which has rack teeth on both sides and is movable up and down. The rack 99 is connected to a rod of a cylinder 100 erected on the base 95 and can be raised and lowered, and by raising and lowering the rack 99, the tilting arms 92 are raised and lowered symmetrically. Note that as long as the tilting arm 92 has a gap approximately equal to that of the U-shaped piece 12 at the contact portion with the U-shaped piece 12 when standing upright, its pivot support can be set to be wide or narrow, and it can be raised using a crank. Various things can be used, such as ones that make you fall.

Therefore, the position adjuster 65 causes the tilting arm 92 to stand upright by reducing the cylinder 100, and correctly positions the frame member 10 on the side that fits into the U-shaped piece 12 in the groove of the U-shaped piece 12.

The welding tool 62 of the present invention is attached to a horizontal frame 111 that is attached to a gate-shaped frame 110 installed across the welding table 61 so as to be movable back and forth. As shown in FIG. 11, the welding tool 62 elastically supports the support frame 116 below the mounting frame 114 attached to the horizontal frame 111. The support frame 116 has a U-shaped portion 119 at its upper end, and a guide shaft 121 hanging from the mounting frame 114 passes through a protrusion 120 in the U-shaped portion 119, and springs 115 are inserted between the upper and lower portions of the protrusion 120, respectively. By inserting the support frame 116 into the support frame 116, the support frame 116 is supported so as to be able to pulsate up and down.
A damping device 125 is interposed between the support frame 116 and the support frame 116 to prevent the support frame 116 from rotating. The support plate 126 provided below the U-shaped portion 119 has a middle upper chip 130.
a. A central electrode 130 with middle and lower chips 130b arranged on the upper and lower surfaces is fixed, and the center part of an upper electrode piece 132 having an outer upper chip 131 facing the middle and upper chips 130a is pivotally supported above the center electrode 130. Below that, a lower electrode 153 having an outer lower tip 133 facing the middle and lower tips 130b is pivotally supported. The upper electrode piece 132 and the lower electrode piece 135 are connected by a link 137 at the rear end, and a rod of a cylinder 139 that is tiltably attached to the U-shaped portion 119 is pivotally connected to the rear end of the upper electrode piece 132. Therefore, as the cylinder 139 expands and contracts, the outer upper tip 13
1. The outer and lower tips 133 alternately approach and move away from the middle and upper tips 130a and the middle and lower tips 130b. cylinder 13
The rear end of the rod 9 protrudes to both sides, and a contact piece 140 provided on the protrusion sequentially operates switches 142 and 143 arranged vertically in parallel at the rear end of the cylinder 139, and the switch approaches the center electrode 132. Electricity can be applied to the upper electrode piece 132 or the lower electrode piece 135.

The damping device 125 is composed of a plunger 145 and a fitting piece 146 that engages with the plunger 145.
A square shaft is used which is erected on a base piece 147 that is attached to the upper side of 19, and a locking part 150 consisting of a triangular groove is recessed in one side of the shaft. The fitting piece 146 has a hole 151 into which the plunger 145 is loosely inserted.
A cam piece 153 that can be fitted into the locking part 150 is attached when the two are spaced apart from each other at the correct distance. The cam piece 153 is urged forward toward the plunger 145 by a spring 156 inserted between the cam piece 153 and an adjustment screw 155 screwed into its back.

As shown in FIG.
9, 10, and 11 are inserted, and by driving the cylinder 139, for example, the outer upper tip 131 at the tip of the upper electrode piece 132 is lowered, and the middle upper tip 1 is lowered.
The joint portion 14 is held between the outer tip 131 of the tip 30a and energized to spot weld the joint portion 14. Also, frame material 3, 4, 5, 6, 9, 1
When the joint 14 is deformed upward due to warpage, distortion, etc., the upper electrode piece 132 rotates and the support frame 116, as shown by the dashed line,
Therefore, the center electrode 130 is pushed up, and the upper electrode piece 13
2. It is possible to reliably weld while preventing excessive force from being generated. Next, the cylinder 139 is extended and the lower joint 14 is similarly welded.

Further, in the damping device 125, when pulsation is generated by the spring 115 along with the vertical movement of the support frame 116, the plunger 145 moves up and down and the cam piece 153 engages with the locking portion 150 while moving back and forth, thereby damping the pulsation. and the locking portion 150 when stationary.
By pressing the support frame 116, the support frame 116 can be correctly positioned again, improving the efficiency of welding work.

In this way, the assembly and welding device 1 is assembled into the temporary assembly device 20.
The frame members 3, 4, 5, 6, 9, 10, and 11 can be temporarily assembled correctly at predetermined positions, and the temporary assembly device 2
0 movement, the transfer device 40 picks up the temporary framework 13, carries it in and transfers it to the welding table 61, and after gripping it,
The welding tool 62 can efficiently weld the joint 14 to form the framework 2.

As mentioned above, the welding tool of the present invention elastically holds the support frame on the underside of the mounting frame, and when excessive force is applied to the upper and lower electrode pieces, the center electrode escapes and absorbs the force. It also has many advantages such as enabling efficient welding, and can be suitably employed, for example, for forming frames for building panels and the like in houses using dry construction methods.

[Brief explanation of the drawing]

FIG. 1 is a plan view illustrating an assembly/welding device, FIG. 2 is a front view thereof, FIG. 3 is a perspective view illustrating an example of a framework, FIG. 4 is a perspective view illustrating a positioning tool, and FIG. 5 is a perspective view illustrating a positioning tool. FIG. 6 is a perspective view illustrating the transfer device, FIG. 7 is a sectional view illustrating its operation, FIG. 8 is a perspective view illustrating the positioning grip, and FIG. 9 is a perspective view illustrating the positioning device. FIG. 10 is a perspective view illustrating a positioning tool; FIG. 11 is a perspective view illustrating a welding tool of the present invention; FIG. 12 is a diagram showing its operation; FIG. 13 FIG. 2 is a perspective view illustrating an example of a damping section. 2...Framework, 3, 4, 5, 6, 9, 10, 11
... Frame material, 12 ... U-shaped piece, 13 ... Temporary framework, 1
4... Joint portion, 20... Temporary assembly device, 22... Frame base, 23... Positioning tool, 25, 26... Side support tool, 27... Pin, 29... Rotating arm, 32...
Retaining pin, 39...lifting tool, 41...travel frame,
41a... Side frame material, 42... Locking arm, 42b
... Hook portion, 43 ... Pulling frame, 44 ... Cylinder, 63 ... Positioning gripping tool, 64 ... Positioning tool, 65 ... Positioning tool, 66 ... Workbench, 69
...Guiding tool, 70...Elevating shaft, 71...Receptacle, 73...Bottom piece, 76...Cylinder, 79...
Slide plate, 92...Tilt arm, 93...Spine piece, 1
14...Mounting frame, 115...Spring, 116...
Support frame, 125... Attenuator, 130... Center electrode, 130a... Middle upper chip, 130b... Middle lower chip, 131... Outer upper chip, 132... Upper electrode piece, 133... Outer lower chip, 135... Lower electrode piece, 145... Plunger, 146... Fitting piece,
150...Locking portion, 153...Cam piece.

Claims (1)

[Scope of utility model registration request] A spring is interposed on the bottom surface of the mounting frame to make the support frame elastic.
At the same time, a central electrode having an upper middle chip and a lower middle chip arranged on the upper and lower surfaces is fixed to the support frame, and an upper electrode piece having an outer upper chip facing the upper middle chip is fixed to the supporting frame. A welding tool comprising a lower electrode piece having outer and lower tips facing the middle and lower tips so as to be able to approach and move away from the tips, and each of which is attached to the support frame so that the outer and lower tips can approach and move away from the middle and lower tips.