JP3431106B2 - Side roll shaft box detachable structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side roll axle box attaching / detaching structure, and more particularly, it can reduce the time required for assembling and removing rolls, and can also be applied to a side roll axle box. It is inserted into the gap between the rod connecting part and the rod of the pressure side device, but the spacer for killing is unnecessary, and the accuracy of forming the electric resistance welded tube by the left and right side rolls can be improved. The present invention relates to a side roll shaft box attaching / detaching structure capable of improving the performance. [0002] For example, an electric resistance welded pipe such as a pipe for a water pipe or a gas pipe, a ventilation duct, or the like is formed by continuously bending a strip-shaped thin plate derived from an uncoiler into a circular cross section or a quadrangular cross section. It is manufactured by welding a butt portion in the width direction of a thin plate and cutting it to a predetermined length. In this ERW pipe production line, a predetermined number of ERW pipe forming machines, in which forming rolls such as upper and lower rolls and left and right side rolls for bending a thin plate are incorporated, are provided upstream and downstream of a welding device. I have. [0003] Incidentally, since the size and shape of ERW pipes manufactured by one ERW pipe production line vary widely, the forming roll incorporated in the ERW pipe forming machine is changed every time the type is changed. Must. When assembling the left and right side rolls to the molding stand and removing
"Yoke attaching / detaching structure of inner stand type rolling mill" disclosed in Japanese Utility Model Application Laid-Open No. 63-62217 filed by the present applicant.
And a claw-shaped rod connecting portion fixed to left and right side roll shaft boxes and loosely inserted into the rods, which are disposed on both sides of the forming stand, as disclosed in the specification of The worker who climbed on the molding stand manually inserted and removed the rattling spacer from above in the gap between the two. [0004] However, in the conventional electric resistance welded tube forming machine, in assembling and removing the assembled roll structure from the forming stand, the rod of the pressure side device and the left and right side roll shafts are used. Since the worker who climbed the molding stand inserted and removed the killing spacer in the gap between the box and the rod connection part, the number of workers was increased,
The work was time-consuming and dangerous. Also, if the degree of insertion of the spacer is insufficient, there is a possibility that inconvenience may occur when the right and left side rolls are moved to the forming position of the ERW pipe by moving the rod of the pressure side device in and out. Was. The present invention has been made in view of such circumstances, and can reduce the time required for assembling and removing a roll, and can be used to kill a roll inserted into a gap between a rod connecting portion of a left and right side roll shaft box and a rod of a compression side device. Spacer is unnecessary,
It is another object of the present invention to provide a side roll shaft box attaching / detaching structure capable of improving the forming accuracy of the electric resistance welded tube by the left and right side rolls and reducing the number of workers and improving the work safety. [0006] According to the present invention, there is provided a semiconductor device comprising:
The side roll axle box mounting and dismounting structure described above includes a molding stand,
Mounted on a mobile trolley that is put in and out of the molding stand
Upper and lower rolls, left and right
Id roll, left and right side rolls for the left and right side rolls
Axle box, and pressure side device for laterally pressing the left and right side roll axle boxes
Of an electric resistance welded tube forming machine provided with a set roll structure having
The left and right side row
A rotating clamp claw is mounted on the shaft box,
The tip of the pressing member is formed so that the clamp claw can be hooked.
The central part of the pressing member is taken in and out along the axis.
And an input rod for rotating the clamp pawl is provided.
It is configured. The electric resistance welded tube forming machine is mounted on a forming stand and a movable carriage which is inserted into and removed from the forming stand, and the rolls and the axle boxes are provided with the pair of pressure side devices. And an assembled roll structure incorporated in the inner stand. Further, the pressing member is put in and out from the tip end.
Possible input rods are provided with coupling operating means. According to the first aspect of the present invention, there is provided a side roll shaft box attaching / detaching structure.
When assembling the left and right side rolls into the electric resistance welded tube forming machine, the tip of the pressing member of the pressure side device is placed in contact with or near the connecting portion of the left and right side roll shaft box, and then one of the pressing member and the connecting portion By operating the connecting operation means provided on the other side and operating the pressing claw provided on the other of the pressing member and the connecting portion via the input rod , these pressing members and the connecting portion are connected, while assembling. When removing the left and right side rolls, the connection operation means is operated to release the connection state by the clamp claws that connected the pressing member and the connection part with the input rod , so the roll assembly removal time is shortened It is possible to securely connect the two members without rattling without using a spacer for rattling as in the past, which allows the right and left side rolls to form the ERW pipe precisely. It is possible to improve the, thereby improving the safety of the worker reduction and work. [0010] In particular, the input rod is moved in and out from the tip of the pressing member of the pressure side device , and is rotated to the left and right side roll shaft boxes .
The clamping member is clamped or unclamped by the clamp claws that are attached as possible, so that the large size of the shaft box, which tends to occur when connecting operation means is provided on the left and right side roll shaft boxes, can be eliminated, and the input rod can be used. The device can be made compact by embedding it in the pressing member so that it can be taken in and out. Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. In the drawings, the production line direction of the ERW pipe is defined as an X direction, a direction orthogonal thereto is defined as a Y direction, and a vertical direction is defined as a Z direction. FIG. 1 is an enlarged cross-sectional view of a main part of a side roll shaft box attaching / detaching structure according to an embodiment of the present invention. FIG. 2 is an entire inner roll type electric resistance welded tube forming machine to which the side roll shaft box attaching / detaching structure is applied. 3 is a front view of the inner roll type electric resistance welded tube forming machine, FIG. 4 is a side view including a partial cross-sectional view of the roll assembly, FIG. 5 is an exploded perspective view of the roll assembly, and FIG. FIG. 7 is an enlarged cross-sectional view of the essential part, and FIG. 7 is a cross-sectional view of S7-S7 in FIG. As shown in FIG. 2, an inner roll type ERW pipe forming machine 10 to which a side roll axle box attaching / detaching structure A according to one embodiment of the present invention is applied is installed on an ERW pipe manufacturing equipment line a. And a set roll structure 13 that is mounted on a movable carriage 12 that is inserted into and removed from the forming stand 11 and that curves and forms an ERW tube from a thin plate. An upper portion of the molding stand 11 is provided with a screw-down device 11a composed of a pair of front and rear screw jacks, and a lower portion of the molding stand 11 is provided with a screw-up device 11b of the same pair of front and rear screw jacks. A load cell 11c with a flange is attached to the tip of the rod of the screw-down device 11a.
A lifting rod 12a which is raised and lowered by inserting and removing the rod 11d of the lifting device 11b to lift or lower the lower roll axle box 26 is disposed at the front and rear portions of the lifting device 11b (see FIG. 3). The movable trolley 12 may be a self-propelled trolley or a trolley pushed and pulled by a traction device. The movable trolley 12 is pulled out from the front of the forming stand 11 along a take-in / out rail 14 extending in the Y direction, gets on the empty rail 17a of the rearrangement trolley 17, and then retracts the rod 16 of the hydraulic cylinder 15 long in the X direction. As a result, the other rail 17b of the rearrangement carriage 17 is connected to the access rail 14, and then the new movable carriage 12 on the other rail 17b moves to the forming stand 11 side, and the new roll assembly 13 is moved to the forming stand 11 Will be incorporated within. FIG. 3 shows the assembled state. [0014] As shown in FIGS.
Reference numeral 3 denotes an inner stand 18 serving as an exterior case, an upper roll 19 forming a forming roll, and left and right side rolls 2.
0, 21 and lower roll 22 and a pair of upper roll axle boxes 2
3, left and right side roll shaft boxes 24 and 25, and a pair of lower roll shaft boxes 26. A large-diameter ERW pipe insertion hole 18a is formed in the center of both side plates of the inner stand 18, and left and right side roll shafts are formed on the front and rear sides of the inner stand 18 when the ERW pipe is formed. Box 24, 2
Pressure-side devices 27 and 28, which are screw jacks having rods 27a and 28a for applying a constant lateral pressure to 5, are provided. As shown in FIG. 1, the pressure side devices 27, 28
Are threaded 27c of rods 27a, 28a in a large nut 61 rotatably supported by bearings 60,
28c is screwed into the shaft 6 of the drive motor 62.
A gear 64 fixed to the distal end of the gear 3 meshes with a gear portion integrally formed on the outer peripheral portion of the nut 61. On the other hand, the gear portion of the nut 61 has a rotating shaft 66 of the encoder 65.
A gear 67 fixed to the tip of the gear is meshed. When the drive motor 62 is rotated, the nut 61 is
Is rotated, whereby the rods 27a and 28a move in the Y direction. At this time, the rotation of the nut 61 with the rotation of the nut 61
Is rotated, and the encoder 65 counts the number of rotations of the rotating shaft 66, thereby detecting the insertion / removal position of the rods 27a and 28a. A rod 27 which is an example of a pressing member
Flanges 27b, 28b are formed at the tips of a, 28a, and one pressure side device 28 is a roll shaft 22 that protrudes long outside the lower roll 22 when the lower roll 22 is replaced.
The rod 28a is disposed outside of the other pressure side device 27 so that the rod 28a does not come into contact with one end of the rod 27a. This protruding portion is detachably connected in-line to a drive system (not shown) of the lower roller 22 provided outside. As shown in FIG. 5, on the inner surfaces of both side plates of the inner stand 18, a pair of upper and lower guides 30 of the upper roll axle box 23 extending in the Z direction are mounted on both upper sides thereof. Sliding guides 31 for left and right side roll shaft boxes 24 and 25 extending in the Y direction
And a lifting guide 32 extending in the Z direction of the lower roll axle box 26 is mounted on both lower sides of the inner surface. On the other hand, the guide grooves 2 corresponding to the elevating guides 30 and 32 are provided on both side surfaces of the upper and lower roll axle boxes 23 and 26.
3a and 26a are formed. In addition, upper roll shaft box 2
A pair of flange engaging portions 11e into which the flanges of the load cell 11c are inserted project from the upper surface of the load cell 3c.
Next, with reference to FIGS. 1, 6, and 7, the side roll shaft box attaching / detaching structure A according to the embodiment of the present invention will be described in detail. As shown in FIGS. 1, 6, and 7, the side roll shaft box attaching / detaching structure A includes a thick and horizontally long connecting portion fastened by bolts 67a to the outer surfaces of the left and right side roll shaft boxes 24 and 25. It has a substrate 68 as an example. On the front side of the substrate 68, a wide horizontal groove 68a and a vertical groove 68 that intersect at the center are provided.
b are formed, and flanges 27 of the rods 27a, 28a are provided on both sides of the lateral groove 68a via pins 69.
A clamp claw 70 capable of hanging on and off the b and 28b is mounted on the shaft . The clamp claw 70 is a substantially L-shaped thick plate member,
When rotated about the pin 69, the claw 70a at the tip of the arc can be hooked on the flanges 27b, 28b of the rods 27a, 28a. On the other hand, the base portions of both left and right clamp claws 70 are arranged so as to face each other at the center of the substrate 68. The base portions 70b of the respective clamp claws 70 are respectively provided with push-up protrusions 72 which are housed via a spring 71 so as to be able to be inserted into and retracted from a pair of cylindrical holes 68c formed at the intersections of the short vertical and horizontal grooves 68a and 68b. Accordingly, a pair of holding plates 73 for regulating the pushing width of the push-up projection 72 are fixed to both sides of the vertical groove 68b by bolts 74. At the center of the rods 27a and 28a, an elongated through hole 76 is formed along the axis so that an elongated input rod 75 as an operation input member of the clamp claw 70 is loosely inserted. A hydraulic cylinder 77, which is an example of a connecting operation means of the input rod 75, is attached to the end surfaces of the rods 27a and 28a on the base side. The tip of the rod 78 of the hydraulic cylinder 77 is fixed to the base of the input rod 75, and when the rod 78 is moved in and out by the hydraulic cylinder 77, the input rod 75 extends from the tips of the rods 27a and 28a.
Is pushed in and out, and the original part 70b pushed up by the pushing projection 72 of the clamp claw 70 is pushed in or released. When a pushing force is applied to the base portion 70b, the clamp claw 70 rotates inward about the pin 69, and the claw portion 70a is hooked from outside to the flanges 27b, 28b of the rods 27a, 28a. On the other hand, when the pushing of the base part 70b is released, the base part 70b is pushed outward from the back by the push-up projection 72, whereby the clamp claw 70 rotates outward around the pin 69, and the flange 27b, The claw portion 70a comes off from 28b. In FIG. 1, reference numerals 79 and 80 denote bearings, and in FIG. 3, reference numeral 81 denotes a cotter for slidably holding the left and right side roll shaft boxes 24 and 25 housed in the inner stand 18 from above. . Next, an operation of the inner roll type electric resistance welded tube forming machine 10 to which the side roll shaft box attaching / detaching structure A according to one embodiment of the present invention is applied will be described. At the time of roll exchange, as shown in FIG. 2, the assembled roll structure 13 is pulled out from the inside of the forming stand 11 via the movable carriage 12, and the new assembled roll structure 13 on the interchangeable carriage 17 is moved via the loading / unloading rail 14. After being replaced by the mounted movable cart 12 and returned to the forming stand 11, or exchanging the forming roll of the old set roll structure 13 outside, the extracted movable cart 12 is directly put into the forming stand 11. return. However, in any case, at the predetermined roll exchange stage, the roll exchange of the forming roll incorporated in the pulled-out roll assembly 13 is performed. As shown in FIGS. 4 to 7, a specific roll exchange operation is carried out by, for example, pulling up the upper roll 19 together with the upper roll axle box 23 along the elevating guide 30 by an overhead crane or the like, and then moving the respective hydraulic cylinders. When the rod 78 is retracted, the input rod 75 is pulled back from the distal ends of the rods 27a and 28a, and the base 70b of the clamp claw 70 is retracted.
Is released, the push-up protrusion 72 causes the clamp pawl 70 to pivot outward about the pin 69, and the pawl 70a comes off the flanges 27b, 28b. Thereafter, the cotter 81 is removed, and the left and right side rolls 20 and 21 together with the left and right side roll shaft boxes 24 and 25 are removed.
Then, the rods 27a and 28a of the pressure side devices 27 and 28 are retracted to a position where they do not contact the roll shaft 22a when the lower roll 22 is pulled up. 3
Pull up along 2 and take out. After that, the assembling of the new rolls 19 to 22 to be incorporated into the inner stand 18 and the assembling of the set roll structure 13 into the forming stand 11 are performed by removing the old rolls 19 to 22 and by removing the old set rolls. The operation of removing the structure 13 is performed in the reverse order. After the left and right side roll axle boxes 24 and 25 are stored in the inner stand 18, the left and right side roll axle boxes 2
4, 25 and rods 27a, 28a of the compression side devices 27, 28
In the operation of connecting the pressure-side devices 27 and 28, first, the rods 27 a and 28 a of the pressure-side devices 27 and 28 are made to protrude, and the distal end surfaces thereof come into contact with the holding plate 73. Subsequently, the input rod 75 is protruded by the hydraulic cylinder 77 so that the base 70
b, the clamp pawl 70 rotates and the pawl portion 70a
Firmly clamps the flanges 27b, 28b of the rods 27a, 28a, and the corresponding two members 24-27a, 25-
28a are connected. With the rods 27a, 28a of the pressure side devices 27, 28 in contact with the pressing plates 73 of the left and right side roll axle boxes 24, 25, the input rod 75 is moved in and out by the hydraulic cylinder 77, and clamped. Because the flanges 27b, 28b are hooked or unhooked by the claws 70, the worker climbs on the inner stand as in the related art, and connects the left and right side roll axle boxes with each other.
It is not necessary to insert or remove a spacer for rattling in the gap between the pressing member of the pressure side device, thereby shortening the roll assembling / removing time. Since the joints can be connected, the accuracy of the molded portion of the ERW pipe by the left and right side roll shaft boxes 24 and 25, and thus the accuracy of the entire ERW pipe, can be improved, and the number of operators and the safety of work can be improved. The hydraulic cylinder 77 is connected to the pressure side device 27,
Since it is provided on the 28 side, it is possible to eliminate the enlargement of the left and right side roll axle boxes 24 and 25 which occurs when the hydraulic cylinder 77 is provided on the left and right side roll axle boxes 24 and 25, for example. Further, the input rod 75 which is taken in and out by the hydraulic cylinder 77 is connected to the rod 27 of the pressure side device 27, 28.
a, 28a, the apparatus can be made compact. Although the present invention has been described with reference to the drawings, the present invention is not limited to this embodiment, and any change in design without departing from the scope of the present invention is included in the present invention. For example, in the embodiment, the screw jack for taking out and inserting the rod was shown as the pressure side device provided on both sides of the electric resistance welded tube forming machine. However, the present invention is not limited to this. Any other pressure side device may be used as long as it can be pressed by the molding pressure of the above. The connecting portions of the left and right side roll shaft boxes are
The connecting portion is not limited to the embodiment but may be any other structure. Further, in the embodiment, the clamp claw is
Although shown, the present invention is not limited to this, and any member may be used as long as the pressing member can be detachably connected to the connecting portion. Then, in the embodiment, the spring force of the spring provided on the left and right side roll shaft box side is used in order to spread the claws so that the pressing member of the pressure side device to be brought close can be engaged with the clamp claws and to stand by. Although not limited to this, other elastic members such as rubber, various cylinder structures such as an air cylinder, and a hook claw that engages an open clamp jaw with the side roll shaft box side, for example, are not limited to this. Similarly, widen the clamp claws by applying other measures such as various engagement structures such as the parts, and the rotation axis of the clamp claws are stopped and tightened to the side roll shaft box. be able to. Furthermore, in the embodiment, the hydraulic cylinder that moves the input rod in and out is shown as the connecting operation means. However, the present invention is not limited to this. For example, any means that can operate the engaging means such as an electric cylinder can be used. Good. [0029] In the embodiment, provided clamping claw to the left and right side roll shaft box side is provided with the connection operation means electric-resistance-welded pipe molding machine side, without limitation, those clan
The mounting side of the hook and the connecting operation means may be reversed.
Further, in the embodiment, the side roll shaft box attaching / detaching structure of the present invention is applied to an inner roll type electric resistance welded tube forming machine having an inner stand. However, the present invention is not limited to this. It can also be used for machines. Further, in the embodiment,
Although the one in which the forming roll is inserted and removed from above at the time of roll exchange is shown, the present invention is not limited to this, and may be adopted, for example, in the case where the forming roll is inserted and removed from the lateral direction. [0030] Claim 1 side roll shaft box detachable structure according according to the present invention, the pressing member of the compression side device to the left and right side roll axis and join those
Provided along the axis at the center of the pressing member in contact with it
Clamp jaws to pivot the out of the input rod, which is
Pressing member of pressure side device and left and right side roll shaft box
As a result, the worker climbs on the assembled roll as in the past, and the gap between the connection part of the left and right side roll shaft boxes and the pressing member of the pressure side device is There is no need to insert and remove the killing spacer, which can shorten the roll assembly removal time,
And can be connected is firmly both members without play, right Saidoro
In addition to improving the accuracy of the ERW pipe by the tool, it is possible to reduce the number of workers and improve the safety of work. [0031] Particularly, since the connecting operation unit was provided in the compression side apparatus, for example, connected to the left and right side roll shaft box-side
The enlargement of the left and right side roll axle boxes which occurs when the operation means is provided can be solved. In addition, since the input rod that is taken in and out by the connecting operation means is housed in the pressing member of the pressure side device, the device can be made compact.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged sectional view of a main part of a side roll axle box attaching / detaching structure according to one embodiment of the present invention. FIG. 2 is an overall perspective view of an inner roll type electric resistance welded tube forming machine to which a side roll shaft box attaching / detaching structure is applied. FIG. 3 is a front view of the inner roll type electric resistance welded tube forming machine. FIG. 4 is a side view including a partial cross-sectional view of the roll assembly. FIG. 5 is an exploded perspective view of the roll assembly. FIG. 6 is an enlarged sectional view of the main part. FIG. 7 is a sectional view taken along S7-S7 of FIG. 6; [Description of References] 10: Inner roll type electric resistance welded tube forming machine, 11: Forming stand, 11a: Press-down device, 11b: Press-up device, 11c:
Load cell, 11d: rod, 11e: flange hooking part, 12: movable carriage, 12a: press-up rod, 13: assembled roll structure, 14: take-out rail, 15: hydraulic cylinder, 16: rod, 17: rearranged carriage, 17a: empty rail, 17b: other rail, 18: inner stand, 1
8a: insertion hole, 19: upper roll, 20: left side roll, 21: right side roll, 22: lower roll, 22a:
Roll shaft, 23: upper roll shaft box, 23a: guide groove, 2
4: Left side roll axis box, 25: Right side roll axis box,
26: Lower roll axle box, 26a: Guide groove, 27: Compression device, 27a: Rod, 27b: Flange, 27c: Thread, 28: Compression device, 28a: Rod, 28b: Flange, 28c: Thread, 30: Elevating guide, 31: sliding guide, 32: elevating guide, 60: bearing, 61: nut, 62: drive motor, 63: shaft, 64: gear, 65: encoder, 66: rotary shaft, 67: gear, 6
7a: bolt, 68: substrate, 68a: lateral groove, 68b: vertical groove, 68c: cylindrical hole, 69: pin, 70: clamp pawl,
70a: claw portion, 70b: base portion, 71: spring, 7
2: push-up projection, 73: holding plate, 74: bolt, 7
5: input rod, 76: through hole, 77: hydraulic cylinder,
78: rod, 79: bearing, 80: bearing, 81: cotter, A: side roll shaft box attachment / detachment structure, a: ERW pipe manufacturing equipment line

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B21C 37/08 B21D 5/12

Claims (1)

(57) [Claims] [Claim 1] A molding stand and a projecting part inside the molding stand.
Is mounted on a moving carriage to be inserted into
Upper and lower rolls, left and right side rolls,
Left and right side roll axle boxes for the
Assembled roll structure having a pressure side device for laterally pressing the droll shaft box
Roll box mounting and dismounting structure of ERW pipe forming machine with body
, The left and right side roll shaft boxes are provided with rotating clamp claws.
The clamp claw is hooked at the tip of the pressing member of the pressure side device.
It is formed so that it can be taken in and out along the axis at the center of the pressing member,
An input rod for rotating the clamp pawl is provided.
A side roll shaft box attachment / detachment structure characterized by the above.