JPS6410292B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention allows for easy, quick and safe roll change by allowing all rolls for forming to be pulled out of or inserted into the forming line together. The present invention relates to a roll changing device for an electric resistance welded tube forming device.

An example of a conventional electric resistance welding tube forming apparatus will be explained with reference to FIGS.
Housings 3a and 3b having housing windows 2a and 2b are arranged upright, and lower roll axle boxes 4a and 4b are arranged at the lower ends of the housing windows 2a and 2b, and a lower roll 5 is attached to and detached from the lower roll axle boxes 4a and 4b. A lower roll shaft 6 is fitted so as to be able to drive, and a nut 7 is screwed to the working side end of the lower roll shaft 6 to prevent the lower roll shaft 6 from coming off. The lower roll drive can be connected via a coupling. Further, the housing 3a is fitted into the lower surface of the housing 3a through a groove so as to be able to slide on a guide rail 8 with a stopper 8a mounted on the common bed 1 in a direction perpendicular to the forming line.

Worm jacks 9a, 9b for raising and lowering the upper roll are attached to the upper portions of the housings 3a, 3b. The worm jacks 9a, 9b are rotated by a worm (not shown), but do not move up or down, and are fitted into the worm wheels 10a, 10b so that they can rotate integrally with the worm wheels 10a, 10b. Hollow spacers 11a, 11b, hollow spacer 1
The screw shafts 12a, 12b are screwed into the female screw portions of the hollow spacers 11a, 11b and can be moved up and down by the rotation of the hollow spacers 11a, 11b.
The lower end of 12b is connected to upper roll shaft boxes 13a, 13 which are fitted into housing windows 2a, 2b so as to be movable up and down.
It is connected so that it can be engaged with and detached from b.

The upper roll shaft boxes 13a and 13b contain the upper roll 1.
4 and spacers 15 and 16 are removably fitted on the outside, and a nut 18 is installed at the working end of the upper roll shaft 17 to prevent the upper roll shaft 17 from slipping out. The upper roll drive device can be connected to the drive end via a coupling.

The shafts 19a, 19b to which the worms meshing with the worm wheels 10a, 10b are fixed are fitted with coupling rings 20 on their opposing parts, and are adapted to transmit power from the shafts 19b to 19a. The fitting portion between the coupling ring 20 and the coupling ring 20 has a polygonal shape, and the shaft 19a can be removed from the coupling ring 20. Further, a lowering motor 22 is connected to the outer end of the shaft 19b via a coupling ring 21.

In addition, in the figure, 23 is a bolt for fixing the housing 3a to the common bed 1, 24 is an engaging member fixed to the base of the housing 3a, and 25 is a rear end flange portion 26 that engages with the end of the common bed 1, and a rod tip. This is a portable fluid pressure cylinder for roll exchange, in which a flange portion 27 can engage with an engaging member 24.

When forming a pipe using the above-mentioned electric resistance welding pipe forming apparatus, the worm jack 9 is moved by the reduction motor 22.
a, 9b, and the worm wheels 10a, 1
By rotating the hollow spacers 11a and 11b, the screw shafts 12a and 12b are lowered, and the upper roll shaft boxes 13a and 13b are lowered, thereby creating a gap between the upper and lower rolls 14 and 5 as shown in FIG. The upper and lower rolls 14 and 5 are rotated by adjusting and driving the upper and lower roll shafts 17 and 6, and the material sent from the electric resistance welding pipe forming device on the upstream side of the forming line is passed through the gap between the upper and lower rolls 14 and 5. Board. Therefore, the material is formed into a predetermined radius of curvature by the upper and lower rolls 14 and 5, and then fed to the electric resistance welded tube forming device downstream of the forming line.

When exchanging the upper and lower rolls 14 and 5 of the electric resistance welding tube forming device, first drive the lowering motor 22 to replace the screw shafts 12a and 12b of the worm jacks 9a and 9b.
, thereby raising the upper roll shaft box 13a, 1
3b, the upper roll 14 via the upper roll shaft 17,
The upper roll 14 is raised until its lower end is above the upper end of the lower roll 5, the nuts 18 and 7 are removed from the upper and lower roll shafts 17 and 6, and the bolts 23 fixing the housing 3a to the common bed 1 are loosened.

Next, the portable hydraulic cylinder 25 is installed at a predetermined position on the common bed 1, and the rear end flange part 26 is engaged with the end part of the common bed 1. With the rod protruding, the rod tip flange part 27 is engaged with the housing 3a. It is engaged with the mating member 24 to supply pressure fluid to the rod side of the portable hydraulic cylinder 25. Therefore, the housing 3a is pulled by the portable hydraulic cylinder 25 and slides along the guide rail 8 in the roll axis direction to a predetermined position, and the upper and lower roll shaft boxes 13a, 4a and the worm jack 9a also move together with the housing 3a. As shown in FIG. 4, the upper and lower roll shaft boxes 13a, 4a are removed from the upper and lower roll shafts 17, 6, and the shaft 19a is attached to the coupling 20.
deviate from When housing 3a slides, bolt 2
Since the hole 3 into which the housing 3a is inserted has a cutout shape as shown in FIG. 3, there is no problem in sliding the housing 3a.

Even if the housing 3a slides to the position shown in FIG. 4, in this state it will get in the way of replacing the upper and lower rolls 14, 5, so the portable hydraulic cylinder 25 is removed from the common bed 1 with the rod protruding. , the housing 3a is connected to the upper and lower roll shaft boxes 13a, 4
a. Lift the worm jack 9a from the common bed 1 with a crane and transport it to another location. Housing 3a etc. are common bed 1
Even when removed from the common bed 1, the housing 3b, upper and lower roll shaft boxes 13b and 4b, upper and lower rolls 14 and 5, worm jack 9b, etc. remain on the common bed 1.

When the housing 3a is transported from the common bed 1 to another location, the spacer 15, upper roll 14, and spacer 16 are pulled out from the upper roll shaft 17 either manually by a worker or using a crane, and the lower roll 5 is removed.
is pulled out from the lower roll shaft 6. If a spacer is provided on the lower roll shaft 6, the spacer is also pulled out.

The old upper and lower rolls 14, 5, etc. are replaced by the upper and lower roll shaft 1.
7 and 6, fit and position a new lower roll 5 onto the lower roll shaft 6, fit and position the spacer 16, upper roll 14, and spacer 15 onto the upper roll 17, and use a crane to remove the housing 3a.
is placed in a predetermined position on the common bed 1 so that the lower surface groove fits into the guide rail 8, and the portable hydraulic cylinder 25 is set on the common bed 1, and the rod tip flange portion 27 is engaged with the engaging member 24, and the upper and lower After aligning the roll shaft boxes 13a, 4a with the upper and lower roll shafts 17, 6, and aligning the shaft 19a with the coupling 20, the portable hydraulic cylinder 25 is operated to move the housing 3a along the guide rail 8 to the stopper 8a. Slide it until it touches, tighten the bolt 23, and screw the nuts 18, 7 onto the working side ends of the upper and lower roll shafts 17, 6. With this, the replacement of new upper and lower rolls 14, 5 is completed.

However, the above-mentioned electric resistance welded tube forming apparatus has the following problems when replacing the rolls.

(i) After removing the housing 3a, remove the upper and lower rolls 1.
4, 5 and spacers 15, 16 one by one from the upper and lower roll shafts 17, 6.
5 and 16 one by one, aligning the upper and lower roll shafts 17 and 6, the upper and lower roll shaft boxes 13a and 4a, the shaft 19a and the coupling 20, and then pushing the housing 3a to the set position, making it easy to replace the rolls. It takes time, and the molding line stops for a long time, reducing production efficiency.

(ii) To hang the housing 3a with a crane,
A sling is required to hang heavy objects, and the work is dangerous.

(iii) The ERW pipe forming equipment shown in Figures 1 to 4 is relatively small and does not have left and right side rolls, but if it is large and has side rolls, the left and right side rolls must also be replaced. As a result, the time required to change the rolls becomes longer and the production efficiency further decreases.Also, when the side rolls on the drive side are pulled out horizontally, they must be taken out to the outside of the drive side, so it is difficult to replace the rolls for power transmission. The shaft and electric motor get in the way, making the work difficult and even more dangerous.

In view of the above-mentioned circumstances, the present invention has been made for the purpose of making it possible to replace each roll easily, quickly, and stably.Outer housings 33a and 33b are erected on both the left and right sides of the molding line. , an inner housing 45 that can be moved in a direction perpendicular to the molding line is removably fitted into the window 32 portion of the outer housings 33a, 33b, and an upper and lower roll shaft box 74 is disposed in the inner housing 45 so as to be movable up and down. , 53 rotatably support the upper and lower rolls 76, 55, or the upper and lower rolls 76, 55 are supported on a beam 90 that is movably disposed on the inner housing 45 and a lower roll shaft box 53 located below the beam 90. The side roll 60 is rotatably supported, and if necessary, the side roll 60 is rotatably supported by the side roll axle box 59 of the width adjusting device 65 that can be raised and lowered and is disposed between the upper and lower roll axle boxes 74 and 53. Alternatively, the side roll axle box 59 of the width adjusting device 65 that can be raised and lowered is disposed between the beam 90 and the lower roll axle box 53.
The side rolls 60 are rotatably supported by the outer housings 33a and 33b, and the lower portions of the outer housings 33a and 33b have rail surfaces capable of supporting the inner housings 45 in a vertically movable manner, and the drive side is removably connected to the lower roll shaft 54. A worm jack 3 that supports rail-shaped brackets 40a and 40b including a bracket 41 that can also support a coupling ring 57 and a lower roll shaft box 53 in a vertically movable manner.
8, a liftable hook 37 for suspending the upper roll shaft box 74 or the beam 90 is provided on the upper part of the outer housing, and an upper roll shaft 75 is provided on the drive side of the upper part of the outer housings 33a, 33b.
The inner housing 45 has a support portion 45a capable of supporting the lower roll shaft box 53 during roll replacement.
A stopper 50 is provided on the inner housing 45 so as to be movable in the roll axis direction, or to support the lower surface of the beam 90 when the rolls are replaced. When the stopper 50' is fixed and the side rolls 60 are provided, a screw shaft 63 that supports the side roll shaft box 59 and is movable up and down is provided in the lower roll shaft box 53.

When pulling out the rolls of an apparatus in which the upper roll 76 is connectable to the coupling ring 57 and is equipped with the side rolls 60, the upper roll shaft box 74 is first pulled up together with the upper roll 76 by the hook 37, the arm 43 is closed, A coupling ring 79 is supported by the arm 43.

Next, the stopper 50 is moved toward the center of the forming line and positioned below the upper roll shaft box 74, and the rail-shaped brackets 40a and 40b are raised. As a result, the inner housing 45 and the stopper 5
0 also rises, the stopper 50 comes into contact with the lower surface of the upper roll shaft box 74, the upper roll shaft box 74 is raised by the stopper 50, a gap is created between the engagement part of the upper roll shaft box 74 and the hook 37, and the upper roll shaft The box 74 can be removed.

When the inner housing 45 rises, the lower roll axle box 53 is placed on the worm jack 38, and the width adjustment device 65 is supported by a screw shaft 69 provided on the lower roll axle box 53 so as to be able to rise and fall.
Initially, the lower roll axle box 53 and the width adjustment device 65 slide relative to the inner housing 45 and do not rise. However, when the inner housing 45 rises by a predetermined amount, the support portion 45a of the inner housing 45 supports the lower roll axle box 53, so as the inner housing 45 rises thereafter, the lower roll axle box 53 moves away from the worm jack 38.
The lower roll shaft box 53 and the width adjustment device 65 also rise, and after the rail-shaped brackets 40a, 40b have risen by a predetermined amount, the rail-shaped brackets 40a, 40b stop rising.

As a result, the inner housing 45 can be pulled out of the molding line with the upper and lower roll axle boxes 74 and 53, the upper and lower rolls 76 and 55, the side roll axle box 59 of the width adjustment device 65, and the side roll 60 mounted thereon, and can be pulled out by appropriate means. Inner housing 45
By moving the upper and lower roll axle boxes 74, 53, upper and lower rolls 76, 55, side roll axle box 59 of the width adjustment device 65, and side roll 65 out of the forming line together, It will be destroyed.

At this time, the inner housing 45 is connected to the housing windows 32 of the outer housings 33a and 3b.
It is pulled out through.

When the upper roll 76' is not connected to the coupling ring 57 and is supported by the beam 90, the arm 4
3 is not opened or closed, and the beam 90 is pulled out of the line while being supported by the stopper 50'.

When replacing the rolls of an apparatus without the width adjustment device 65, when the inner housing 45 is raised by a predetermined amount by raising the stepped brackets 40a and 40b, the lower roll axle box 53 is moved up to the inner housing 45.
The upper roll shaft box 53 or beam 90 is supported by a stopper 50 movable in the roll axis direction or a fixed stopper 50'.

Inner housing 4 equipped with new roll
5 into the forming line, the upper roll shaft box 74 or beam 90 fitted with new upper rolls 76, 76' is inserted into the stopper 5 outside the forming line.
0 or 50', and a new lower roll 55
The lower roll shaft box 53 fitted with the width adjustment device 6 is supported by the support portion 45a of the inner housing 45.
5, a new side roll 60 is attached to the screw shaft 69 provided in the lower roll shaft box 53.
A width adjustment device 65 equipped with a side roll shaft box 59 fitted with the inner housing 4 is installed.
5 in the direction perpendicular to the molding line and inserted into the molding line. At this time, the inner housing 45
passes through the housing windows 32 of the outer housings 33a, 33b, and the housing windows 3
2 and set at a predetermined position in the molding line.

Next, by lowering the rail-shaped brackets 40a and 40b, each roll and roll axle box or beam are also lowered together with the inner housing 45, and the lower roll axle box 53 is moved to the worm jack 3.
8. Therefore, after this point, even if the inner housing 45 is lowered, the lower roll axle box 53 will not be lowered. If the width adjustment device 65 is provided, the width adjustment device 65 also does not descend. Also, the upper roll axle box 74 or the beam 90 engages with the hook 37 by lowering the inner housing 45, and the upper roll axle box 74
is supported by arm 43.

When the inner housing 45 is lowered by a predetermined amount and each axle box or beam is separated from the stopper 50, 50' and positioned at a predetermined position, the upper roll 76
If it is the upper roll axle box 74 that supports the upper roll 76', the arm 43 is opened and the hook 37 is lowered to lower the upper roll axle box 74 together with the upper roll 76 to a predetermined position. In this case, the hook 37 is lowered to lower the beam 90 together with the upper roll 76' to a predetermined position.

Embodiments of the present invention will be described below with reference to the drawings.

5 to 13 show an embodiment of the present invention, which is an embodiment of a 4-roll fin pass stand corresponding to the invention set forth in claim 1. It should be noted that the invention described in claim 2 is obtained by excluding the width adjustment device of this embodiment.

Housing window 32 on common bed 31
A pair of left and right outer housings 33a,
33b is erected, and the outer housings 33a, 3
At the top of 3b, a worm jack 35 is installed to move the screw down screw 36 up and down by a screw down motor 34 that can be switched between high and low speeds, and a hook 37 for eliminating the rattling of the screw screw 36 is installed using a fluid pressure (not shown). A motor-driven worm jack 38 is provided at the bottom of the outer housings 33a and 33b to adjust the height direction position of the lower roll shaft box 53 set in the inner housing 45, which will be described later. At the same time, a vertical fluid pressure cylinder 39 is arranged,
Rail-shaped brackets 40a and 40b having bifurcated sides are attached to the fluid pressure cylinder 39 so as to support wheels 46 of an inner housing 45, which will be described later. A V-shaped bracket 41 capable of supporting a coupling 57 of a universal spindle 56, which will be described later, is fixed to the bracket 40b, and the outer housings 33a, 33b are fixed to the bracket 40b.
A hook-shaped arm 43 that can be opened and closed by a fluid pressure cylinder 42 is pivotally attached to the upper part of the outer housing 33b on the drive side, so that the arm 43 can support a coupling 79 of a universal spindle 78, which will be described later. A fixed rail 44 is disposed between the outer housings 33a and 33b so that its longitudinal direction is perpendicular to the direction in which the tube travels.

Inner housings 45 are disposed inside the outer housings 33a, 33b, and extend through the housing windows 32 of the outer housings 33a, 33b in a direction perpendicular to the tube traveling direction. 33b is placed in close contact with the inner side of the housing window 32 so as not to move relative to the pipe traveling direction when the inner housing 45 is in the line, and at the bottom of the inner housing 45 so as to be able to move in a direction perpendicular to the pipe traveling direction. A wheel 46 is attached, and the inner housing 4 is attached via the wheel 46.
5 is placed on the rail-shaped brackets 40a and 40b, and a seventh
As shown in the figure, a keeper plate 47 having a U-shaped side surface is fixed, and a protrusion 48 whose side surface size fits into the groove of the keeper plate 47 is provided on the drive side of the inner housing 45.
As shown in the figure, a groove is provided between the protrusions 48 and 48 so that the thick part of the keeper plate 47 fits into the inner housing 45.
a, 40b, the keeper plate 47 fits into the groove between the protrusions 48, 48, so that the inner housing 45 does not move in a direction perpendicular to the direction of tube movement. Upper required position (keeper plate 4
8 and 9) at approximately the same height as the mating part of 7).
As shown in FIG. 10, a fluid pressure cylinder 49 whose axis is perpendicular to the direction of pipe travel is disposed, and the groove of the inner housing 45 is inserted into the rod tip of the fluid pressure cylinder 49 in the direction of travel of the pipe. A stopper 50 is disposed to slide in a direction perpendicular to the upper roll shaft box 74, which will be described later.
A hook 51 having a concave groove for pulling out the inner housing 45 is fixed to the working side end of the inner housing 45.

A guide portion 52 facing inward is provided near a position where the inner housing 45 comes into contact with the inner side of the housing window 32 of the outer housings 33a, 33b when the inner housing 45 is located at a required position within the line. At 52,
A lower roll shaft box 53 rotatably supporting a horizontal lower roll shaft 54 is arranged so as to be able to slide in the vertical direction, a lower roll 55 is fixed to the lower roll shaft 54, and is arranged in the inner housing 45. Lower roll shaft box 5
When the lower surface of 3 is supported by the upper surface of the worm jack 38 disposed below the outer housings 33a and 33b during tube forming, and when the inner housing 45 is raised, as shown in FIG. The lower roll shaft 54 on the drive side is made to protrude laterally from the lower roll shaft box 53 so that the end of the lower roll shaft 54 can be supported by a stepped support section 45a at the lower part of the inner housing 45, and the end of the lower roll shaft 54 is connected to the universal The lower roll 55 can be rotated by fitting into a coupling ring 57 at the end of the spindle 56 and rotating the universal spindle 56 with a drive motor (not shown).

A side roll frame 58 is disposed above the lower roll shaft box 53 and is capable of sliding vertically along the guide portion 52 of the inner housing 45. The side roll shaft box 59 with the side roll 60 pivotally attached thereto is fitted so as to be slidable in a direction perpendicular to the direction of tube movement, and the inner housing 45
A worm 61 is placed at the front and rear positions with respect to the traveling direction of the
A width adjustment device 65 consisting of a worm wheel 62, a screw shaft 63, a nut 64, etc. is attached, and the tip of the screw shaft 63 is brought into contact with the rear of the side roll axle box 59 to push the side roll axle box 59 toward the center of the line. Do it like this. Note that the width adjustment device 65
The screw shaft 63 may be rotated by a motor or manually.

A shaft 66 whose axis extends in the direction of the tube axis and can be rotated with a tool such as a ratchet spanner is disposed on the side of the lower roll shaft box 53, and a worm 67 is fixed to the front and rear of the shaft 66, and the lower roll Axle box 53
A worm wheel 68 is rotatably disposed at a required position as shown in FIG.
7 and the worm wheel 68 are engaged with each other.
A vertically oriented screw shaft 69 is screwed into the center of the worm wheel 68.
The upper end head portion 70 of the side roll frame 5
The side roll frame 58 is inserted into the hollow part 71 provided at the lower part of the screw shaft 69, and the side roll frame 58 is supported by the upper end head part 70 of the screw shaft 69. 1
As shown in detail in Figure 3, a spacer 73 with an L-shaped cross section and a handle 72 having a U-shaped groove is inserted to maintain the distance between the center of the lower roll 55 and the side roll 60 at a predetermined dimension during normal work. I'm starting to get it.

An upper roll axle box 74 is disposed above the side roll frame 58 and the side roll axle box 59 and is slidable in the vertical direction along the guide portion 52 of the inner housing 45. An upper roll shaft 75 to which a horizontal upper roll 76 is fixed is rotatably fitted to the upper roll shaft box 74.
A protrusion 77 that can be supported by the hook 37 is fixed above 4, and the lower end of the lowering screw 36 is brought into contact with the upper center of the upper roll shaft box 74 so that the upper roll 76 can be lowered, The upper roll shaft 75 on the drive side can be rolled down, the end of the upper roll shaft 75 on the drive side projects laterally from the upper roll shaft box 74, and the end of the upper roll shaft 75 is connected to the end of the universal spindle 78. Cup ring 79
By rotating the universal spindle 78 with a drive motor (not shown),
The upper roll 76 is allowed to rotate.

Next, the roll exchange cart will be explained with reference to FIGS. 14 to 16. As shown in FIG. A rail 80 extending in a direction parallel to the pipe traveling direction is laid on the working side foundation of these ERW pipe forming equipment group, and a hydraulic cylinder 81 is installed on the rail 80 in a direction parallel to the pipe traveling direction. A movable trolley 82 is mounted on the trolley 82, and a rail 83 extending in a direction perpendicular to the tube traveling direction is attached to the trolley 82 so that the inner housing 45 of the ERW tube forming apparatus can be transferred thereto.
Another rail 84 is installed between 3 and 83 so that the inner housing 45 incorporating a new roll to be replaced can be placed thereon, and each of the above-mentioned ERW tube forming apparatuses M
A transfer rail 85 parallel to the rails 83 and 84 is laid between the carriage 82 and the carriage 82, and a fluid pressure rail 85 whose axis extends perpendicularly to the direction of movement of the pipe is provided on a side further away from the center of the pipe than the carriage 82. 1 cylinder 86
A hook 87 is attached to the rod end of the fluid pressure cylinder 86 so as to be able to engage with the hook 51 of the inner housing 45. A rail 89 of the same rail gauge as the rails 83, 84, and 85 is laid between the cylinders 86 so that wheels 88 supporting the weight of the rod can run.

To explain how to replace each roll, when the tube forming apparatus finishes forming the tube, a keeper plate 47 is installed in the groove between the protrusions 48 and 48 of the inner housing 45 as shown in FIG.
are fitted together, whereby the inner housing 45
is prevented from moving in a direction perpendicular to the pipe traveling direction, and the fitting portions of the inner housing 45 to the outer housings 33a, 33b are in a state where they are in contact with the inside of the housing window 32 of the outer housings 33a, 33b. Once inserted, the stopper 50 is retracted from the upper roll shaft box 74, and the universal spindles 78, 56 and the upper and lower roll shafts 75, 54 are connected.

On the other hand, the rail 84 (on the right side in FIG. 15) adjacent to the rail 83 from which the inner housing 45 to be replaced is pulled out by an appropriate means such as a crane in advance.
Inner housing 4 with new roll
5 is placed on the trolley 82 by the fluid pressure cylinder 81.
rail 8 in a direction parallel to the pipe traveling direction.
3 is aligned with the rails 85 and 89, and the hydraulic cylinder 86 is operated to project the rod toward the molding line. Then, the wheel 88 supporting the rod is run on the rails 89, 83, and 85 in sequence, and the hook 87 attached to the tip of the rod is placed above the hook 51 of the inner housing 45 to be replaced, as shown in FIGS. 5 and 15. It will come to the position and stop.

In an inner housing equipped with new rolls placed on the rail 84, each roll is preset to a predetermined position using a roll shop or the like before being placed in the forming lie. That is, a lower roll axle box 53 equipped with a lower roll 55 is provided at the stepped portion of the new inner housing 45.
A side roll frame 58 is supported on the lower roll axle box 53 by a screw shaft 69 adjusted to a required protrusion amount, and the side roll frame 58 and the side roll axle box 59 is positioned at the required height, and the width adjustment device 65
The distance between the left and right side rolls 60, 60 is adjusted to a predetermined distance. Also, the upper roll 76
The lower surface of the upper roll shaft box 74 is placed on a stopper 50 projected by the hydraulic cylinder 49.

Hook 5 of inner housing 45 to be replaced
When the hook 87 is positioned above 1, the lowering motor 3
4 drives the worm jack 35 to raise the reduction screw 36 to the upper limit, operates a hydraulic cylinder for pullback (not shown), and uses the hook 37 to move the upper roll shaft box 74 and the upper roll 7.
6. Pull up the upper roll shaft 75, etc. to the upper limit position (this is the upper roll rearrangement position and is always constant), operate the fluid pressure cylinder 42, rotate the arm 43 to the state shown on the left side of FIG. Coupling 79 on the upper roll shaft 75 side of the spindle 78
is fixed by an arm 43. Upper roll shaft box 74
The reason why is raised to the upper limit position is as follows.

In other words, when replacing the roll, the coupling 7
9 needs to be supported by an arm 43 attached to the outer housing 33b, and the arm 43 is provided above the outer housing 33b. Note that the coupling ring 79 is attached to the arm 43.
By supporting the upper roll shaft 75 in the coupling ring 79, positioning is not required when fitting the upper roll shaft 75 into the coupling ring 79, and fitting can be easily performed.

When the upper roll shaft box 74 etc. are pulled up to the uppermost position and the coupling ring 79 is supported by the arm 43, the hydraulic cylinder 49 shown in FIGS. 8 and 10
is activated to project the stopper 50 toward the center of the forming line and positioned below the lower surface of the upper roll shaft box 74, and the fluid pressure cylinder 39 is activated to raise the inner housing 45 together with the rail-shaped brackets 40a and 40b. Then, the upper surface of the stopper 50 of the inner housing 45
4, the upper roll axle box 74 rises slightly, and as shown in FIG. 17, the upper roll axle box 74
A gap is created between the lower surface of the projection 77 and the upper surface of the hook 37, and the upper roll shaft box 74 can be pulled out. As shown in FIG. 17, the reduction screw 36 has been raised to the upper limit, so it does not come into contact with the upper surface of the upper roll shaft box 74.

Further, when the inner housing 45 rises, the lower roll axle box 53 is placed on the upper end of the worm jack 38, and the side roll frame 58 of the width adjustment device 65 is attached to the lower roll axle box 5 via the screw shaft 69.
3, and initially the lower roll shaft box 53,
Side roll frame 58, side roll axle box 5
9 slides relative to the inner housing 45 and does not rise, but the inner housing 45
rises to a certain extent, the stepped support portion of the inner housing 45 shown in FIG.
3, the inner housing 4
5 further rises, the lower roll shaft box 53
is separated from the upper end of the worm jack 38, the lower roll axle box 53, side roll frame 58, and side roll axle box 59 also rise, and the rail-shaped bracket 40
When the upper surfaces of rails 44 and 85 coincide with the upper surfaces of rails 44 and 85, the fluid pressure cylinder 39 stops operating and the inner housing 45 also stops rising, and the hook 51 of the inner housing 45 stops moving the fluid as shown in FIG. The pressure cylinder 86 engages with the hook 87 of the rod.

When the inner housing 45 stops rising, the V-shaped bracket 41 attached to the drive-side fluid pressure cylinder 39 is connected to the universal spindle 5.
The line side end coupling ring 57 of No. 6 is supported as shown on the left side of FIG. 7, and the projection 48 of the inner housing 45 is also at a height that allows it to pass through the groove of the keeper plate 47 as shown on the left side of FIG.

When the inner housing 45 is raised to a predetermined position, each roll and its accessories (roll unit) are loaded on the inner housing 45, and the hooks 51 and 87 are also engaged with each other, as described above. When the hydraulic cylinder 86 is operated to move the rod backward, the inner housing 45 is pulled out through the rail 85 onto the rail 83 of the truck 82. Inner housing 4
5, the upper and lower roll shafts 75, 54 are connected to the coupling rings 5 of the universal spindles 56, 78.
Get out of it more smoothly than 7,79. Also, the coupling rings 57, 7 of the universal spindles 56, 78
9 is an arm 43 on the outer housing 33b side.
Since it is supported by the V-shaped bracket 41, no misalignment occurs.

When the inner housing 45 is pulled out onto the truck 82, the fluid pressure cylinder 81 is operated to move the truck 82 in a direction parallel to the tube traveling direction at a distance of 1/2 of the arrangement pitch L of the ERW tube forming device. the rail 84 on which the new inner housing 45 is placed is aligned with the rail 85 of the series from which the inner housing 45 was pulled out. Due to the movement of the truck 82 in a direction parallel to the pipe traveling direction, the hook 51 of the pulled-out inner housing 45 comes off from the hook 87 of the hydraulic cylinder 86 rod.
If you move by L/2, a new inner housing 4
5 becomes engaged with the hook 87 of the hydraulic cylinder 86 rod.

Once the new inner housing 45 is in place, the rod of the hydraulic cylinder 86 is pushed out to push the inner housing 45. Then, the inner housing 45 passes over the rail 85 and enters the line, and the outer housing 33a,
33b, and the rail-shaped bracket 40
a, 40b via wheels 46.

When the inner housing 45 is inserted into the required position of the rail-shaped brackets 40a, 40b, the ends of the upper roll shaft 75 and the lower roll shaft 54 automatically fit into the holes of the coupling rings 79, 57. The end cross-sectional shapes of the upper and lower roll shafts 75, 54 and the cross-sectional shapes of the holes of the coupling rings 79, 57 are both oval-shaped, so as long as they fit together, there will be no problem with power transmission.
No special keys are required.

Once the inner housing 45 is positioned on the rail brackets 40a, 40b, the hydraulic cylinder 39 is actuated to lower the inner housing 45 together with the rail brackets 40a, 40b. Then, first, the lower surface of the protrusion 77 of the upper roll axle box 74 placed on the stopper 50 hangs from the hook 37 on the outer housing 33a, 33b side, the stopper 50 separates from the lower surface of the upper roll axle box 74, and further the inner housing 45 As it descends, a gap is created between the stopper 50 and the upper roll axle box 74, and the lower surface of the lower roll axle box 53, on which the side roll frame 58 etc. are mounted via the screw shaft 69, is located at the upper end of the worm jack 38. The lower roll 55 and the side roll 60 are positioned integrally with the side roll frame 69 and the like. In addition, a gap is created between the lower roll shaft box 53 and the step-shaped support portion of the inner housing 45, and the groove portion of the protrusion 48 is also fitted so as to completely sandwich the keeper plate 47, so that the inner housing 45 is perpendicular to the direction of pipe movement. It will not move in that direction. The inner housing 45 stops when it is lowered by a predetermined amount. Also, the upper roll shaft box 74
When the stopper 50 and the stopper 50 are separated, the stopper 50 is moved back by the hydraulic cylinder 49.

When the inner housing 45 falls to the lower limit,
As described above, the fluid pressure cylinder 49 is operated to retract the stopper 50 to the position shown in FIG.
is lowered at high speed while watching the digital counter.
Then, the lower end of the screw-down screw 36 comes into contact with the upper surface of the upper roll axle box 74 and pushes the upper roll axle box 74 down to a predetermined position. During this descent, hook 37
The lifting force of the hydraulic cylinder is the reduction screw 36.
Therefore, when the screw-down screw 36 lowers the upper roll shaft box 74, the hook 37 also lowers together.

This completes the insertion of the new inner housing 45 into the line and the positioning of the rolls.The pulled out inner housing is transported to the roll shop by a crane, etc., and the rolls are replaced, bearings are replaced, oil is supplied, etc. . When the positioning of the rolls installed in the forming line is completed, the drive motor (not shown) is driven to rotate the universal spindles 56, 78, and the spindles 56, 78 are rotated.
78 rotates the lower roll 55 and the upper roll 76.
is rotated to continuously feed the material being formed into a tubular shape from the upstream side to the downstream side, and the forming is performed as shown in Fig. 5.

FIGS. 18 and 19 show another embodiment of the present invention, which is an embodiment of a four-roll breakdown stand corresponding to the invention set forth in claim 3. It should be noted that the invention described in claim 4 is obtained by excluding the width adjustment device of this embodiment.

A beam 90 that can slide vertically is attached above the side roll frame 58 and side roll shaft box 59 of the inner housing 45, and a narrow horizontal upper roll is attached to a bracket 91 attached to the lower surface of the center of the beam 90. 76' is installed rotatably,
A fixed stopper 50' is fixed slightly below the beam 90 of the inner housing 45. The upper roll 76' is a free roll and is not driven. Note that in the drawings, the same reference numerals as those shown in FIGS. 5 and 6 indicate the same components.

When replacing a roll in a device configured in this way:
As in the previous example, each roll unit is set in the inner housing and the entire inner housing is replaced, but at this time, the beam 90 is attached to the fixed stopper 5.
It is placed on 0'. The reason why this is called a fixed type is as follows.

That is, in the one shown in FIG. 5, since the width adjustment device 65 has to move up and down for both the upper roll 76 and the upper roll axle box 74 in accordance with the pipe diameter, the width adjustment device 65 for both the upper roll 76 and the upper roll axle box 74 has to be moved up and down in accordance with the pipe diameter. If the lifting amount of the device 65 becomes large and the stopper 50 is of a fixed type, the upper roll shaft box 74 and the width adjusting device 65 will interfere with the stopper 50 during molding. However, in this embodiment, since the upper roll 76' is inserted into the pipe and presses down the thick part of the plate, the distance between the axes of the upper and lower rolls depends only on the thickness of the plate. This is because the amount of elevation of 65 is small, and therefore there is no risk that beam 90 or width adjustment device 65 will interfere with stopper 50' during molding.

FIGS. 20 and 21 show still another embodiment of the present invention, which is an embodiment of a two-roll breakdown stand corresponding to the invention set forth in claim 5, in which side rolls are unnecessary. be. Also in this example, the stopper 50' is of a fixed type. The reason is the same as shown in FIGS. 18 and 19.
Roll replacement is also carried out in the same manner as in the previous embodiment. In the drawings, the same reference numerals as those shown in FIGS. 18 and 19 indicate the same components.

In the embodiments of the present invention, the lower roll and side rolls are performed outside the line during roll positioning, and after insertion into the line, only the upper roll is lowered at high speed for positioning. If the universal spindle can be raised and lowered, the upper roll can be positioned outside the line in addition to the lower roll and side rolls, that is, all the rolls can be positioned outside the line, and other features of the present invention Of course, various changes may be made without departing from the gist of the invention.

The roll changing device for the electric resistance welded tube forming device of the present invention includes:
By setting the upper and lower molding rolls and side rolls in the inner housing, and pulling out or inserting the inner housing into the molding line when replacing the rolls, all rolls can be replaced, and the inner housing can be replaced easily. Since there is no need to align the upper and lower rolls and the coupling ring when inserting them into the molding line, the rolls can be replaced easily, quickly, and safely.As a result, the molding line can be stopped for a short time, reducing production. Various excellent effects such as improved efficiency can be achieved.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional front view of the conventional device, and Figure 2 is the 1st
- direction arrow view of figure, figure 3 is figure 2 -
4 is a front view of the electric resistance welded tube forming apparatus shown in FIG. 1 with the housing on the working side taken out of the forming line; FIG. 5 is a view showing an embodiment of the apparatus of the present invention. , a front view of the 4-roll impass device, FIG. 6 is a left side view of FIG. 5, FIG. 7 is a right side view of FIG. 5, and FIG. 8 is a view from near the width adjustment device of FIG. 9 is a side view showing the relationship between the upper roll shaft box and the stopper of the ERW pipe forming apparatus in FIG. 5, and FIG.
Figure 1 is a side view of the inner housing of the electric resistance welding tube forming device shown in Figure 5 supporting the lower roll shaft box, Figure 12 is a side view of the mechanism that supports the width adjustment device of the equipment shown in Figure 5; Figure 13 is a plan view of the spacer used in the mechanism that supports the width adjustment device in Figure 12;
FIG. 4 is a plan view of the roll exchanging device of the present invention, FIG. 15 is a view taken from the direction arrow in FIG. 14, FIG. 16 is a view taken from the direction arrow shown in FIG. 14, and FIG. 14 to 16 are side views of the relationship between the upper roll shaft box and the hook when the inner housing is raised when attempting to change rolls, and FIG. Fig. 19 is a left side view of Fig. 18;
FIG. 20 shows another embodiment of the device of the invention,
Front view of the device for two-roll breakdown, second
FIG. 1 is a left side view of FIG. 20. In the figure, 32 is a housing window, 33a, 33
b is an outer housing, 37 is a hook, 38 is a worm jack, 40a, 40b are roll brackets, 41 is a bracket, 43 is an arm, 4
5 is an inner housing, 50 and 50' are stoppers, 53 is a lower roll shaft box, 54 is a lower roll shaft, 5
5 is the lower roll, 57, 79 is the coupling, 58
is a side roll frame, 59 is a side roll shaft box, 60 is a side roll, 65 is a width adjustment device, 7
4 is the upper roll shaft box, 75 is the upper roll shaft, 76, 7
6' indicates the upper roll.

Claims (1)

[Claims] 1. Outer housing 33 disposed on both left and right sides of the molding line and having housing windows 32
a, 33b; an inner housing 45 that is removably fitted into the outer housing window 32 and movable in a direction perpendicular to the molding line; Upper and lower rolls 76 and 55 are rotatably supported by upper and lower roll axle boxes 74 and 53, and a width adjustment device 65 is disposed in the inner housing 45 so as to be movable up and down so as to be located between the upper and lower roll axle boxes 74 and 53. a side roll 60 supported by a side roll shaft box 59; a rail surface disposed at the lower part of the outer housings 33a, 33b and capable of supporting the inner housing 45 in a vertically movable manner; A bracket 41 that can also support a coupling ring 57 that is detachably connected.
a worm jack 38 disposed at the lower part of the outer housings 33a, 33b and capable of supporting the lower roll axle box 53 in a vertically movable manner; a liftable hook 37 for suspending the upper roll shaft box 74; and a coupling ring 79 disposed on the upper driving side of the outer housing 33b and detachably connected to the upper roll shaft 75; an arm 43 that can be opened and closed; a support portion 45a that is fixed to the inner housing 45 and that can support the lower roll shaft box 53 during roll replacement; A stopper 5 capable of supporting the box 74 and movable in the roll axis direction
0; and a screw shaft 69 that is provided on the lower roll shaft box 53 and supports the side roll shaft box 59 in a vertically movable manner. 2 Outer housing 33 disposed on both left and right sides of the molding line and having housing windows 32
a, 33b; an inner housing 45 that is removably fitted into the outer housing window portion 32 and movable in a direction perpendicular to the molding line; It has upper and lower rolls 76 and 55 rotatably supported by upper and lower roll shaft boxes 74 and 53, and a rail surface that is disposed at the lower part of the outer housings 33a and 33b and can support the inner housing 45 in a vertically movable manner. A bracket 41 that can also support a coupling ring 57 that is detachably connected to the lower roll shaft 54.
a worm jack 38 disposed at the lower part of the outer housings 33a, 33b and capable of supporting the lower roll axle box 53 in a vertically movable manner; a liftable hook 37 for suspending the upper roll shaft box 74; and a coupling ring 79 disposed on the upper driving side of the outer housing 33b and detachably connected to the upper roll shaft 75; an arm 43 that can be opened and closed; a support portion 45a that is fixed to the inner housing 45 and that can support the lower roll shaft box 53 during roll replacement; A stopper 5 capable of supporting the box 74 and movable in the roll axis direction
A roll changing device for an electric resistance welded tube forming device, characterized in that it is provided with: 0 and 0. 3 Outer housing 33 disposed on both left and right sides of the molding line and having housing windows 32
a, 33b; an inner housing 45 that is removably fitted into the outer housing window 32 and movable in a direction perpendicular to the molding line; A beam 90 that can be raised and lowered, and upper and lower rolls 76' and 55 that are rotatably supported by a lower roll shaft box 53 that can be raised and lowered and arranged below the beam 90, and between the beam 90 and the lower roll shaft box 53. a side roll 60 supported by a side roll shaft box 59 of a width adjusting device 65 which is disposed on the inner housing 45 so as to be movable up and down; A bracket 41 has a rail surface that can be supported so as to be movable up and down, and the drive side can also support a coupling 57 that is detachably connected to the lower roll shaft 54.
a worm jack 38 disposed at the lower part of the outer housings 33a, 33b and capable of supporting the lower roll axle box 53 in a vertically movable manner; a hook 37 that is provided and capable of suspending the beam 90; a support portion 45a that is fixed to the inner housing 45 and capable of supporting the lower roll axle box 53 at the time of roll replacement; A stopper 50' capable of supporting the beam 90 during roll replacement; and a screw shaft 69 provided on the lower roll shaft box 53 and supporting the side roll shaft box 59 in a vertically movable manner. Roll changing device for ERW pipe forming equipment. 4 Outer housing 33 disposed on both left and right sides of the molding line and having housing windows 32
a, 33b; an inner housing 45 that is removably fitted into the outer housing window 32 and movable in a direction perpendicular to the molding line; A beam 90 that can be raised and lowered, upper and lower rolls 76' and 55 that are rotatably supported by a lower roll shaft box 53 that can be raised and lowered and arranged below the beam 90; A bracket 41 has a rail surface capable of supporting the inner housing 45 in a vertically movable manner, and also supports a coupling ring 57 which is detachably connected to the lower roll shaft 54 on the drive side.
a worm jack 38 disposed at the lower part of the outer housings 33a, 33b and capable of supporting the lower roll axle box 53 in a vertically movable manner; A hook 37 that is provided and can be raised and lowered to hang the beam 90; a support portion 45b that is fixed to the inner housing 45 and that can support the lower roll shaft box 53 during roll replacement; A roll changing device for an electric resistance welded tube forming device, comprising: a stopper 50' capable of supporting the beam 90 during changing. 5 Outer housing 33 disposed on both left and right sides of the molding line and having housing windows 32
a, 33b; an inner housing 45 that is removably fitted into the outer housing window 32 and movable in a direction perpendicular to the molding line; Upper and lower rolls 76 and 55 are rotatably supported by a lower roll shaft box 53 that can be raised and lowered and are arranged below the upper and lower roll shaft boxes 74 and 53, and an inner housing 45 that is arranged below the outer housings 33a and 33b. The bracket 41 has a rail surface that can support the rollers in a vertically movable manner, and also supports a coupling ring 57 that is detachably connected to the lower roll shaft 54 on the driving side.
a worm jack 38 disposed at the lower part of the outer housings 33a, 33b and capable of supporting the lower roll axle box 53 in a vertically movable manner; a liftable hook 37 for suspending the upper roll shaft box 74; and a coupling ring 79 disposed on the upper driving side of the outer housing 33b and detachably connected to the upper roll shaft 75; an arm 43 that can be opened and closed; a support portion 45a that is fixed to the inner housing 45 and capable of supporting the lower roll axle box 53 during roll replacement; and a support portion 45a that is fixed to the inner housing 45 and that supports the upper roll axle box 53 when the roll is replaced. 74. A roll changing device for an electric resistance welded tube forming device, characterized in that a stopper 50' capable of supporting a stopper 74 is provided.