JPS6320640B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reversing device. More specifically, the present invention relates to a welding reversing device that inverts architectural and civil engineering steel materials to which joints and the like are welded so that downward welding can always be performed.

Conventionally, when welding ribs, plates, or joints to appropriate beams or columns such as H-beams or boxes, we would use a crane to weld the H-beams or boxes onto a table of other H-beams. Welding work is performed while turning the machine upside down. Therefore, reversing work was not only dangerous, but also difficult and inefficient.

In order to solve the above problems, a reversing device that can hold and rotate a main material such as an H-section steel has been developed. The conventional reversing device is, for example, Utility Model Publication No. 47-39457.
As shown in Japanese Utility Model No. 51-13476, it is common to use a hydraulic cylinder to fix the main material. Further, in the conventional reversing device, a lid portion formed on a part of the annular rotating body is configured to be openable and closable in order to take in and take out the main material.

In such a configuration, vibrations may occur when the main material is taken in and out using a crane or the like while the lid is open, or from accidental contact by a worker when fixing the main material. There was a risk that the lid member could suddenly close. Further, in the conventional structure, the reaction force when the main member is fixed is received by the lid, which tends to distort the rotating body and make it oval, which is not desirable. Furthermore, there is a risk that the lid may open due to the reaction force when it is fixed, and sparks during welding may scatter to the hydraulic hose.
There was a safety issue.

The present invention was invented in view of the conventional problems as described above, and one embodiment will be described in detail below with reference to the drawings.

As shown in FIG. 1, a reversing device 1 for welding according to an embodiment of the present invention has machine stands 3, 3' made of H-section steel.
Mounting frames 5, 5' spaced parallel to each other in a direction perpendicular to the longitudinal direction of the frame are placed in a position adjustable manner, and a reversing rotation is performed in which the main material M such as an H-shaped steel or a box is reversed on these frames 5, 5'. It is constructed by installing devices 7 and 7'. Although not shown, a plurality of mounting holes are provided in the longitudinal direction on the upper surface of the bases 3 and 3', and the frames 5 and 5' are mounted to the mounting holes as appropriate through fasteners such as bolts. Along with that,
The reversing and rotating devices 7, 7' are similarly attached to the frames 5, 5' via fasteners such as bolts. In the reversing rotation device 7, 7',
Since the reversing and rotating device 7' has substantially the same configuration as the reversing and rotating device 7, the configuration of the reversing and rotating device 7 will be explained in detail below using the drawings from FIG. 2 onwards. Incidentally, in the reversing and rotating device 7', the same members as those of each component of the reversing and rotating device 7 will be given the same reference numerals, and a description of the reversing and rotating device 7' will be omitted.

The reversing and rotating device 7 includes a machine base 9 attached to the pedestal 5, an annular rotating body 11 rotatably provided on the machine base 9, and a main member M located near the center of the rotating body 11. A fixing device 13 for fixing the main material M, a holding device 15 for holding the lid portion of the rotating body 11 that is opened and closed when loading and unloading the main material M into the fixing device 13, and the machine for rotationally driving the rotating body 11. It is composed of a rotary drive device 17 attached to a stand 9 and the like.

As shown in FIGS. 2, 3, and 4, the machine base 9 has substrates 21, 21' arranged side by side, each having a substantially semicircular arc-shaped notch 19 in its upper part.
Connecting members 23a, 23b, 23c... between 21'
..., reinforcing plates 25a, 25b, etc. are integrally welded. As shown in FIG. 3, a plurality of support rollers 29 having flanges 27, 27' on both sides are provided at appropriate locations along the edge of the semi-circular notch 19 between the substrates 21, 21'. is rotatably attached via a shaft pin 31.
Further, the rotation drive device 17, such as a geared motor, is appropriately mounted on the base plate 21 of the machine base 9 on the right side in FIG. This rotary drive device 17 is a drive device capable of forward and reverse rotation, and is appropriately interlocked and connected to a worm reduction device 35 attached to the base plate 21 via a plurality of fasteners 33 such as bolts. This rotary drive device 17 can be driven alone or simultaneously in conjunction with the rotary drive device 17 of the other reversing rotary device 7'. The rotary drive device 17 is provided so as not to be rotatable from the output side of the worm speed reducer 35, such as a rotary transmission member 37 such as a gear. And the rotation drive device 17 is
It is interlocked and connected to the rotary body 11 via the rotation transmission member 37 of the worm speed reduction device 35, etc., as will be described later.

That is, the rotating body 11 is fixedly attached to the machine base 9 at an appropriate rotating position.

The rotating body 11 is rotatably provided with the outer peripheral surface of the rotating body 11 being supported by the plurality of support rollers 29 . As shown in FIG. 2, the rotating body 11 has its outer peripheral edge in its original position, that is, the upper right portion in FIG.
It is composed of an arc-shaped first disc body 41 and a second disc body 43, each of which has one end pivotally connected via an arc 9. As shown in FIG.
The second disc body 43 occupies the remainder of the upper part, and together they form almost a full circle.

As shown in FIGS. 2 and 3, the first disc body 41 is integrally provided by welding arcuate plates 47 and 47' to both sides of an outer peripheral plate 45 curved in an arcuate shape. The first disk body 41 rotates with its outer circumferential surface, such as an outer circumferential plate 45, being supported by the plurality of support rollers 29. Further, on the outer surface of the arc plate 47 on one side, an arc-shaped rotation transmission member 4 such as an exterior gear that meshes with the rotation transmission member 37 is provided.
9 are attached via a plurality of fasteners 49' (see FIG. 4) such as bolts.

As shown in FIG. 2, a plurality of arcuate angle scales 51 for displaying the rotational position of the rotational body 11 are attached to a plurality of fasteners 53 such as bolts at appropriate locations on the rotational transmission member 49. It is installed. The plurality of angle scales 51 are each engraved with graduations 55 that indicate angles.

On the other hand, in FIG. 2, on the left side of the substrate 21, a base line 57 indicating a rotating plate of the rotating body 11 corresponds to the graduations 55 of the plurality of angle scales 51.
A pointer member 59 inscribed with is attached as appropriate.
Further, a bracket 61 is attached to the substrate 21 at approximately the center in FIG. 2 via a plurality of fasteners 63 such as bolts.

As shown in FIG. 4, a roller 65 that comes into contact with the inside of the rotation transmission member 49 is rotatably supported at the upper end of the bracket 61 via a pin 67. This roller 65 prevents the first disc body 41 and the like from moving upward.

Further, as shown in FIG. 2, a bracket 71 is fixed to the substrate 21 at an appropriate distance from the bracket 61. As shown in FIG. 5, a through hole 73 is bored substantially horizontally at the tip of the bracket 71 that protrudes toward the arcuate plate 47. As shown in FIG. The substrate 21' corresponds to the through hole 73.
As shown in FIG. 5, a through hole 75 is bored in the hole. On the other hand, the first disc body 41 has the following features as shown in FIG.
As shown in FIG. 5, a plurality of through holes 77 are bored at appropriate locations corresponding to the through holes 73 and 75.

Rotation of the first disc body 41 is prevented by inserting pinches 79 into the through holes 73, 77, and 75 when the rotation body 11 is in its original position.

As shown in FIG. 2, mounting portions 81 and 81' such as slightly semicircular base plates are provided on the inner side of the outer circumferential plate 45 so as to be appropriately spaced and facing each other in order to mount the fixing device 13 thereon. be. Each mounting portion 81, 18' is welded to the outer circumferential plate 45 at approximately the center between the arcuate plates 47, 47'.

A guide portion 85 for guiding an end portion of a presser rod, which will be described later, is formed in a vertical direction in FIG. 2 at a portion of each linear portion 83 of each of the mounting portions 81, 81'. Further, step portions 87, 87 are provided at one end of the straight portion 83, and a through hole 89 is bored substantially horizontally in each step portion 87.

Each stepped portion 8 of each of the mounting portions 81, 81'
On the 7 side, as shown in FIGS. 2 and 4, auxiliary plates 91 and 91' are fixed to each mounting portion 81 and 81' by sandwiching them therebetween. Note that a support member that supports one side of the main member M is inserted into the space surrounded by each of the mounting portions 81, 18' and the auxiliary plates 91, 91'. The auxiliary plates 91, 91' are provided with step portions 93, 93' whose upper ends are symmetrical and rectangular in FIG. 2, and are cut out into multiple steps. Further, as shown in FIG.
5,95' are drilled. Further, windows 97, 97' cut out in an oval shape are formed below each of the through holes 95, 95'.

The fixing device 13 includes a first fixing part 99 that clamps and fixes the main material M in the original position of the rotating body 11, that is, in the vertical direction in FIG.
The second fixing part 101 presses and fixes the
It is composed of etc.

The first fixing portion 99 includes the auxiliary plate 91,
One support member 103 is provided which is inserted between 91' and the like to place and support the main material M. Support member 1
03, as shown in Figures 2 and 4, the main material M
A plurality of step portions 105a, 105b, . Further, a plurality of through holes 107 are arranged in the support member 103 in the vertical direction in FIG. 2 at positions corresponding to the through holes 95 and 95' of the auxiliary plates 91 and 91'.

The support member 103 is attached to the auxiliary plate 9 via an appropriate number of fasteners 109 such as bolts.
It is detachably provided between 1 and 91' so that its position can be adjusted. The support member 103 has multiple steps 1.
05a, 105b...... and drilling a plurality of through holes 107 to provide the support member 103 on the rotating body 11 in a detachable and position-adjustable manner. It can be fixed close to the center of movement, and the rotation of the rotating body 11 that rotates together with the main material M can be made smooth.

A bracket 113 has forked portions 111 formed at the upper portions of both sides of the support member 103 or at the stepped portions 87 and 87 of each of the mounting portions 81 and 81'.
Each of the bases of 113 is a fastener 1 such as a bolt.
It is fixedly attached via 15. Further, the brackets 113, 113 are provided with through holes 113 in opposing directions. As shown in FIG. 2, one end of a screw rod 117 is screwed into the tip of each of the brackets 113, 113 on both sides.

A press member 119 for pressing the main material M downward in FIG. 2 is movably provided on the screw rods 117, 117. The presser member 119 is shown in FIG.
As shown in FIG. 6, a plurality of plate-like members 121 are connected to each other via connecting members 123, 123 at appropriate intervals. At the longitudinal end of the holding member 119, the above-mentioned mounting portions 81, 8 are provided.
The cross section is C to engage with the guide parts 85, 85 of 1'.
Shape guide members 125 are welded to each other.

A portion of the upper surface of the presser member 119 has a
As shown in FIG. 2, rack-shaped uneven portions 127 are provided with appropriate pitches. and presser member 119
is a pressing tool that engages with the screw rods 117, 117 so as to come into contact with the upper surface of the main material M placed on the gauge plate 103 in the original position of the rotating body 11, and then screws into the screw rods 117, 117. It is fixed via a nut member 129 that forms a. Further, a washer 131 is inserted between the presser member 119 and the nut member 129, and the washer 131 has a concave and convex portion formed on its lower surface to engage with the concave and convex portion 127 of the presser member 119.

Pressing bars 133, 133 for pressing both sides of the main material M are attached to the second fixing part 101 so as to be able to move in and out of the mounting parts 81, 81', facing each other.

That is, as shown in FIG. 2, the mounting portions 81, 81' are each formed with a notch 135 cut out in the center direction of the first disk body 41, and the notch 135, 135 and Oval cutouts 137 are respectively formed in orthogonal directions. Further, cylindrical members 139 and 141 are fixed to each of the notches 135 at appropriate distances from each other. Between the cylindrical members 139 and 141, a second
As shown in the figure, a handle 145 with a female screw hole 143 is rotatably provided.

The pressing bar 133 having a threaded portion 147 on its outer periphery is inserted into the cylindrical member 139, the female threaded hole 143 of the handle 145, and the cylindrical member 141. In addition, the pressing bar 133 has a groove 1 in the longitudinal direction.
49 is formed, and the tip of a rotation prevention member 151 such as a bolt screwed onto the cylindrical member 139 projects into this groove 149. Therefore,
By turning the handle 145 in an appropriate direction, the pressing bar 133 can be freely moved in and out of the mounting portion 81 toward the center of the rotating body 11.

The second disc body 43, as shown in FIG.
Arc plates 155, 15 are provided on both sides of the outer peripheral plate 153, which is curved into an arc in substantially the same manner as the first disc body 41.
5' are integrally welded to each other. A circular arc plate 155 corresponding to the circular arc plate 47 in the first circular plate body 41 has an arc-shaped rotation transmission member 157 attached to a fastener 1 such as a bolt.
57' (see Figure 7).

As shown in FIG. 2, this rotational transmission member 157 has an arcuate angle scale 159 connected to a plurality of fasteners 161 such as bolts, similar to the first disc body 41.
It is attached via. The angle scale 159 has graduations (not shown) that indicate the rotational position of the rotating body 11. and second disc body 4
3 is provided with a through hole 163 into which the pin 79 is inserted in order to prevent the rotating body 11 from rotating. On the inner side of the outer peripheral plate 153, a second
As shown in the figure, a crescent-shaped reinforcing plate 165
is welded to a position approximately in the center between the arcuate plates 155, 155'.

The second disc body 43 occupies the remaining portion of the first disc body 41 and configures the rotating body 11 in a disc shape, and attaches the main material M to the rotating body 11 in the original position of the rotating body 11. It forms the lid part when taking things in and out.

That is, at one end of the second disc body 43, the seventh
As shown in detail in FIG.
A circumferentially projecting connecting bracket 167 measuring 5,155' is attached via a plurality of fasteners 169, such as bolts. and connection bracket 1
67 is inserted between the arcuate plates 47 and 47' at one end of the first disc body 41, and is pivotally connected to the first disc body 41 via the connecting member 39. The second disc body 43 is rotatably provided around the connecting member 39, and
67 and the rotation transmission members 49, 157 between the first disc body 41 and the outer peripheral plate 45 and in the first and second disc bodies 41, 43, and the arc plates 47, 4
7', 155, and 155', a slight gap is provided between each of them.

Furthermore, a bomb 171 such as a torsion spring is attached to one end of each of the first disc body 41 and the second disc body 43. That is, the circular arc plates 47, 47' of the first disc body 41 include the seventh
As shown in FIG.
73' is provided protruding in the direction of the center of rotation of the rotating body 11, and an ammunition 171 such as a torsion spring is attached to the brackets 173, 173' via pins 175 whose both ends are pivotally connected. . As shown in FIG. 7, both ends of the ammunition 171 are connected to the first
It is supported by a bracket 177 suitably fixed near one end of the disc body 41 and one side of the connection bracket 167 on the second disc body 43 side.

The bullet 171 always urges the second disc body 43 upward in FIG. 2, and the biasing force of the bullet 171 is almost balanced with the weight of the second disc body 43. It is designed to give you the strength to do so. Therefore, the second disc body 43 can be rotated very easily and safely.

The other end of the second disc body 43 is detachably connected to the other end of the first disc body 41. That is, at the other end of the first disc body 41, there is a second
As shown in FIGS. 10 and 11, a base of a connecting lever 179 is rotatably provided via a pin 181 between the arcuate plates 47 and 47'. A through hole 183 is bored at the tip of the connecting lever 179, as shown in FIG. An eccentric portion 187 of an eccentric shaft 185 is rotatably inserted into this through hole 183. Both ends of the eccentric shaft 185 are connected to a lever 19 having a rectangular recess 189 formed at one end so as to engage with the tip of the connecting lever 179.
It is fixed at 1.

Near the other end of the lever 191, a long hole 193 is bored in the same direction as the longitudinal direction of the lever 191. Further, on one side of the lever 191, an arc-shaped recess 195 is formed in a direction perpendicular to the elongated hole 193. A locking member 197 for locking the other end of the lever 191 to the second disc body 43 is removably provided in the recess 195 . A circular arc portion 199 is formed in a part of the lock member 197 to engage with the recess 195, and a connecting member 20 such as a bolt is provided on the circular arc portion 199 side.
One end of 1 is screwed. The connecting member 201
The other end protrudes into a block 203 fixed to the arc plates 155, 155' of the second disc body 43 and the reinforcing plate 165, as shown in FIG.

That is, the block 203 has a recess 205 opened in one direction, and the other end of the connecting member 201 protruding into the recess 205 has a collar 201'. A bullet 207 such as a spring is loaded between the collar 201' and the bottom of the recess 205. Furthermore, bullet machine 207
The locking member 197 is always urged toward the center of the rotating body 11 via the connecting member 201. Therefore, the lever 191 is moved to the block 20.
3. In other words, the locking member 197 can be freely attached to and detached from the second disk body 43 by pulling the locking member 197 and turning it in an appropriate direction to align with the elongated hole 193 or orthogonally to it. It is.

Further, at the other end of the first disc 41, a tenth
As shown in FIG. 11, the connecting lever 17
Brackets 207 and 209 for restricting rotation of the rotating body 11 of 9 toward the center are attached by welding or in contact with each other via a plurality of fasteners 211 such as bolts. The brackets 207 and 209 are respectively formed with recesses 213 and 215 having a width substantially the same as the width of the connecting lever 179 and having a rectangular cross section. The bracket 209 includes a bracket 219 attached to the other end of the second disc body 43 via a plurality of fasteners 217 such as bolts.
A stepped portion 221 (see FIG. 10) is formed to engage with. Note that the bracket 219 is formed with a recess 223 similar to the brackets 207 and 209.

The holding device 15 holds the rotating body 1 in its original position.
Rotating body 1 that opens and closes when loading and unloading the main material M into 1
1, that is, the second disc body 43 is held.

As shown in FIG. 1 and FIG.
A support frame 225 fixed to the support frame 225 and the like extend upward. On one side of the support frame 225, that is, on the rotating body 11 side, there is a 12th
As shown in Fig. 13, a plate-shaped bracket 22
7 is attached via a plurality of fasteners 229 such as bolts. One end of each of plate-shaped support members 231a and 231b is welded to the bracket 227 at an appropriate distance from each other and is provided substantially horizontally.

At the other ends of the support members 231a and 231b,
As shown in FIG. 13, a rotation shaft 233 is rotatably mounted. One end of this rotation shaft 233, that is, the rotation transmission member 49 of the rotation body 11,
A plate-shaped arm member 23 is attached to the end protruding toward the 157 side.
The base of 5 is integrally fixed and rotatably provided. Further, the rotation shaft 233 is loaded with a bullet 237 such as a torsion spring.

As shown in FIGS. 12 and 13, one end of this ammunition 237 is connected to the supporting members 231a and 231b.
A bracket 239 welded horizontally between the parts and a fixture 24 such as a bolt screwed onto the support member 231b.
The other end of the bullet 237 is inserted into a through hole 245 formed in a bracket 243 appropriately fixed to the arm member 235. The ammunition 237 always urges the arm member 235 upward in FIG. 12, and the biasing force of the ammunition 237 is sufficient to support the weight of the arm member 235 and the like.

A roller support member 247 that protrudes upward in FIG. 12 is properly fixed to the tip of the arm member 235. This roller support member 24
At the base of 7, as shown in Figures 12 and 14,
A roller 249 that can freely roll by contacting the inner side of the rotation transmission members 49, 157 of the rotation body 11 is attached to the shaft 2.
It is attached via 51.

At the other end of the roller support member 247, a first
As shown in FIG. 4, a support portion 247' is provided which is bent into an approximately L shape and extends approximately horizontally toward the other side of the rotating body 11. This support part 247'
When the second disc body 43 is rotated around the connecting member 39, the outer peripheral surface of the second disc body 43 is supported to prevent the second disc body 43 from rotating due to its own weight or the like. It is what is being prevented. As shown in FIG. 14, a stopper member 253 for preventing the roller support member 247 and the like from detaching from the rotating body 11 is attached to the end of the support portion 247' via a plurality of fasteners 255 such as bolts. It is installed.

At the upper end of the support frame 225, as shown in FIG.
As shown in FIG. 15, when the second disc body 43 is rotated upward about the connecting member 39, the arc plate 155' in the second disc body 43
A fixing device 2 that fixes the second disk body 43 by pressing the outer surfaces of the rotation transmission member 157 and the rotation transmission member 157.
57 is provided.

That is, on both sides of the upper end of the support frame 255, arm parts 259, 259' are formed which are bent in a direction perpendicular to the longitudinal direction of the support frame 255, that is, to the left in FIG. And at the tip of each arm 259, 259',
As shown in FIG. 15, cylindrical members 261, 26
1' is fixed and placed almost horizontally. In addition, the screw holes 2 formed in the bodies of the cylindrical members 261, 261'
A screw shaft 265 is screwed into each of the holes 63.
Each screw shaft 265 has a lock nut 26.
7 are screwed together.

A bracket 271 that contacts the outer circumferential surface of the second disk body 43 on the rotating body 11 side is attached to the rising portion 269 between the arm portions 259 and 259' at both ends via a plurality of fasteners 273 such as bolts. It is mounted almost horizontally. Further, the rising portion 26
A reinforcing member 275 for reinforcing the rising portion 269 is welded to the base of the bracket 271 at the bottom of the bracket 271.

In the above configuration, the reversing rotation device 7,
H-shaped steel in each rotating body 11 at 7′,
To place and fix the main material M such as a box, move one or both of the reversing/rotating devices 7 and 7' to position it according to the longitudinal dimension of the main material M, and then tighten the fasteners. It is fixed on the bases 3, 3' via the bases 3 and 3'.

Next, the rotation drive devices 17 and 17 of the reversing rotation devices 7 and 7' are separately driven, and each rotation body 11 is , 11 to their original positions. After each rotating body 11 is rotated to its original position, the pin 79 is inserted into each through hole 7 of the bracket 71, the rotating body 11, and the substrate 21'.
3, 77, and 75 to prevent the rotating body 11 from rotating.

Then, pull the locking member 197 provided near the other end of each of the first and second disc bodies 41 and 43 outward, turn it in an appropriate direction, and align it with the long hole 193 of the second disc body. 43 and the lever 191 is inserted into the through hole 18 of the connecting bar 179 with the eccentric shaft 185 as the axis.
Rotate around 3. Eccentric portion 18 of eccentric shaft 185
7, the first disc body 41 and the second disc body 43
contact is released, and by further rotating the connecting lever 179 around the pin 181, the second disc body 43 can be freely rotated outward about the connecting member 39.

Next, when the other end of the second disc body 43 is lifted, the second disc body 43 is easily rotated outward by the action of the bullet 171 loaded on the pin 175. At this time, the arm member 235 in the holding device 15
The second
While contacting the inner side of the rotation transmission member 157 of the disc body 43, the disc body 43 is simultaneously rotated outward about the rotation shaft 233. Note that the arm member 235, the roller support member 247, etc. are urged outward by the action of the bullet 237 loaded on the rotation shaft 233, so there is no difficulty in rotating them.

The second disc body 43, arm member 235, etc. are rotated outward about the connecting member 39 and the rotation shaft 233, and come into contact with the bracket 271 provided on the rising portion 269 of the support frame 225 in the holding device 15. and stop. Thereafter, the screw shafts 265 of the arm members 261, 261' in the fixing mechanism 257 are rotated in appropriate directions, and the ends of the respective screw shafts 265 are connected to the rotation transmission member 157 of the second disc body 43 or the circular arc plate 155'. The second disc body 43 comes into contact with the side surface of the
Hold it fixed and turn the lock nuts 267, 267 to fix it more securely.

After the second disc body 43 is rotated outward about the connecting member 39 and fixedly held by the holding device 15, the nut members 129, 129 of the first fixing portion 99 in the fixing device 13 are attached to the respective threaded rods 117.
At the same time, remove the presser member 119 from the screw rod 11.
Remove from 7,117. Next, a support member 103 having stepped portions 105a, 105b, . . . corresponding to the dimensions of the main material M is inserted between the auxiliary plates 91, 91', etc. Then, appropriate through-holes 107 of the support member 103,
107 and the through holes 95 of the auxiliary plates 91, 91',
The support member 103 is fixed to the auxiliary plates 91, 91' via fasteners 109, 109 together with the auxiliary plates 95'.

After fixing the support member 103 of the first fixed part 99 between the auxiliary plates 91 and 91', the main material M is placed on the appropriate step of the support member 103 of each rotary body 11 using a crane or the like. At the same time, the presser member 119 is inserted into the screw rod 117, 117 and brought into contact with the side surface of the main material M, and then the nut members 129, 1 are inserted.
The main material M is clamped and fixed between the support member 103 and the presser member 119 via 29 or the like. If the main material M is a box or the like, the second fixing part 101
The ends of the press bars 133, 133 are brought into contact with the side surfaces of the main material M, and the main material M is fixed by turning the respective handles 145 in appropriate directions.

After fixing the main material M near the center of rotation of the rotating body 11 using the first fixing part 99 and the second fixing part 101 of the fixing device 13, the lock nut 267 and the screw shaft 265 of the fixing device 257 in the holding device 15 are fixed. Turn the second disc body 43 in an appropriate direction to release the pressure and fixation of the second disc body 43, and then attach the second disc body 43 etc. to the connecting member 39.
The first and second disc bodies 41, 43
abut the other ends of each. At this time, the first
A bullet 171 is provided at one end of the second disc body 41, 43.
Since it is loaded with bullets, the second disc body 43 will not fall due to its own weight.

Then, the connecting lever 179 is rotated around the pin 181, and the lever 191 is moved to the connecting lever 1.
It rotates around the through hole 183 of 79. Eccentric shaft 1
By rotating the lever 191 to which the lever 85 is integrally attached, the tip of the lever 191 presses the bracket 219 due to the action of the eccentric portion 187 and moves into the second position.
The other end of the disc body 43 is pressed against the first disc body 41, and the first and second disc bodies 41, 43 are securely fixed. Then, pass the lock member 197 through the elongated hole 193 of the lever 191, pull the lock member 197, and turn it in an appropriate direction to lock the recess 19 of the lever 191.
5, the other end of the lever 191 is fixed to the second disc body 43.

Each rotating body 11 of the reversing rotation device 7, 7'
After placing and fixing the main material M on the main material M, the pins 79, 79 are removed, and the respective rotary drive devices 17 are interlocked to rotate the rotating body 11 in an appropriate direction, so that the desired welding position on the main material M is set. When located on the upper surface, the rotation drive device 17 is stopped.

Then, after inserting pins 79 and 79 as necessary to prevent the respective rotating bodies 11 from rotating, a rib, plate, or joint, etc. is downwardly welded to the main material M using an appropriate welding device. .

As mentioned above, the main material M is rotated by the reversing and rotating device 7,
7', and after completing downward welding such as a joint, drive the rotary drive device 17 to return the rotary body 11 to its original position, insert the pin 79, The rotating body 11 is fixed to the machine base 9. After that, the locking member 197 is removed from the lever 191 in the opposite order as described above, and the lever 1 is removed.
91, connecting lever 179 through hole 183, pin 1
81. and second disc body 4
3 around the connecting member 39, and the screw shaft 26 of the fixing device 257 in the holding device 15.
5,265 or the like.

Next, the handle 14 in the second fixed part 101
5, 145 in the appropriate direction, press lever 13
3 is moved back from the side of the main material M to release the fixation of the main material M. Then, the nut members 129, 129 in the first fixing portion 99 are removed from the respective screw rods 117, and the presser members 119 are attached to the screw rods 11.
Remove from 7.

As mentioned above, the first in the fixing device 13,
After releasing the fixation of the main material M by the second fixing parts 99, 101, when the main material M is taken out from the rotary body 11 using a crane or the like, all welding work such as bonding to the main material M is completed.

As can be understood from the above description of the embodiments, the gist of the present invention is as described in the claims, and as is clear from the description, in the present invention, the main material is In order to do this, a part of the annular rotating body is provided so as to be openable and closable, and a slightly semicircular mounting portion is provided in opposition to the inside of this rotating body. A single support member supporting one side of the main material is attached to one end side of each of the above-mentioned mounting parts, and the position can be freely adjusted in the direction of approaching and away from the axis of the rotating body, and the position can be freely fixed mechanically. Each of the mounting portions is provided with a holding member that faces the support member and presses and supports the other side of the main material, the position of which is adjustable and mechanically fixable. .

That is, in the present invention, by adjusting the positions of the support member and the presser member, the center of gravity of the main material can be made to substantially coincide with the axis of the rotating body,
Since there is no large deviation, the unbalanced load is small and the rotating body can be rotated easily.

Further, when the main material is pressed and fixed by the support member and the presser member, the reaction force is received by the attachment part, so there is no possibility that the rotating body will be deformed into an oval shape. Moreover, there is no reaction force acting on the parts that can be opened and closed. Therefore, the openable and closable portion only needs to be opened and closed and the shape of the rotating body should be maintained in a circular shape, and there is no danger of it opening due to reaction force.

Further, according to the present invention, the support member and the presser member are fixed to the mounting portion mechanically, for example, by a screw mechanism, and not by a hydraulic mechanism such as a hydraulic cylinder, so that sparks are prevented during welding. There is no fear of fire caused by scattering.
Furthermore, even in the event of a power outage, the main material remains fixed without loosening, making it highly safe.

In addition, in the present invention, the rotary body can be opened and closed freely.
Of course, it can be fixed with the part facing upward, but the machine base is provided with a fixing device that can fix and hold the part opened upwards of the rotating body. .

Therefore, according to the present invention, when the first part of the rotary body is opened and the main material is taken in and out using a crane, or while the main material is being fixed, an operator or the like may accidentally touch the first part. Even if the first part comes into contact with the second part, the first part will not suddenly close, which further improves safety.

Note that this invention is not limited to the above-mentioned embodiments, but can be modified by making design changes.
It can also be implemented in various other embodiments.
For example, it is also possible to configure the lower side of the rotating body in FIG. 2 to be openable and closable.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view of the device according to the present invention, FIG. 2 is a front view of the main part, and FIGS. Omitted side explanatory views, Fig. 5, Fig. 6, Fig. 7,
Figures 8, 9, 10, and 11 are enlarged explanatory views of the main parts, Figure 12 is a front view of the main parts, and Figures 13, 14, and 15 are the main parts. It is an enlarged explanatory view of the section. 7, 7'... Reversing rotation device, 9... Machine base, 11
...Rotating body, 17...Rotating drive device, 41...First disc body, 43...Second disc body, 81, 81'...
... Attachment part, 99 ... First fixing part, 103 ... Support member, M ... Coverage, 119 ... Pressing member, 257
...fixing device.

Claims (1)

[Claims] 1 A part of a circular rotating body 11 rotatably supported on the machine base 9 is provided so as to be freely openable and closable, and the rotating body 11 is
A single support member 103 that supports one side of the main material M is attached to the axis of the rotating body 11 at one end side of each of the slightly semicircular mounting portions 81 and 81' that are provided facing each other inside. A holding member 119 is provided so as to be freely adjustable in position and mechanically fixed in the direction of approaching and separating from the support member 103, and presses and supports the other side of the main material M.
are provided in each of the mounting portions so as to be adjustable in position and mechanically fixable, and the rotating body 11 is provided in a freely fixable manner to the machine base 9 with the openable/closable part of the rotating body 11 facing upward, so that it can be opened upward. A reversing device for welding, characterized in that a fixing device 257 is provided on the machine base 9, which can fix and hold the first part of the rotating body 11 in an open state.