JPS6251688B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coil unwinding device capable of shortening the coil unwinding time in entrance equipment such as an electric resistance welded pipe production line, a pickling line, and a shear line.

For example, in conventional electric resistance welding pipe entrance equipment, it is usually a one-mandrel type, and when the supply of one coil strip is finished, a new coil is loaded and the supply continues intermittently, so the coil loading work Sometimes, the strips could not be supplied, resulting in production line downtime and lower operating rates. A method has also been developed in which two mandrels are arranged in series on the strip supply line, and while one mandrel is supplying strips, the other mandrel is loaded with a new coil. However, in this method, the distance between the second mandrel and the pinch roll that pulls out the strip becomes long, resulting in downtime.

The present invention has been developed in view of the above circumstances, and is provided with a shift cart movable in a direction perpendicular to the line in the inlet equipment of the strip supply line, and a method for unwinding the strip coil on the shift cart. A coil unwinding device, characterized in that two lines of coil unwinding mechanisms each comprising various devices such as a mandrel, a coil opener, and a pinch roll are arranged parallel to the line and facing each other. This is related.

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

FIGS. 1 and 2 show the inlet equipment for the electric resistance welded pipe, in which a leveler 1, shear 2, and welder 3 are installed in sequence on a strip supply line L.

A shift truck 5 is provided on the entry side of the leveler 1 so that it can move in a direction perpendicular to the line L by the expansion and contraction of a cylinder 4 mounted on a foundation 16. Pinch rolls 6a, 6b for guiding the strip coil 7, coil openers 8a, 8b for unwinding the strip coil 7, and mandrels 9a, 9 for loading and holding the transported coil 7.
B and B are installed facing each other at the required interval to form the line L.
The mandrels 9a, 9b are connected to the cylinders 10a, 10b.
It is constructed so that it can move toward and away from the line L in a direction perpendicular to the line L by expanding and contracting.

Further, the shift cart 5 has mandrels 9a and 9b.
Rails 12, 12 for moving the coil car 11, which will be described later, are laid on the side opposite to the pinch rolls 6a, 6b from the gap, and a band cutter frame 13 is constructed so as to straddle the rails 12, 12 close to the mandrels 9a, 9b. A movable band cutter (not shown) for cutting the coil winding band is provided on the top.

Also, on the foundation 16 on the side opposite to the leveler 1 of the shift truck 5, there are rails 15, 15 for transporting the coil 7 received from the unloader 14 by the coil car 11 so that the coil car 11 can move onto the rails 12, 12. are laid in a direction perpendicular to the rail 12.

As shown in FIGS. 3 to 5, the coil car 11 is engaged with a bottom coil car 17 and a top coil car 18 so that it can run on the rails 15, 15 and on the rails 12, 12 of the shift truck 5.・It is configured so that it can be separated.

That is, the bottom coil car 17 has the rails 15,
It has each wheel 20 that can move along 15, and
A pinion 22 that meshes with a rack 21 laid in parallel on the foundation 16 between the rails 15 and 15 and a travel motor 23 that drives the pinion 22 are provided on one side of the bottom coil car body 19 in the running direction, and At the top of the bottom coil car body 19,
Rail 2 extending perpendicular to rails 15, 15
4 and 24 are provided at the same spacing and at the same height level as the rails 12 and 12 of the shift truck 5.

Further, the top coil car 18 rides on the rails 24, 24 on the bottom coil car body 19 and is provided with wheels 27 driven by a travel motor 26. A lift frame 28 is fitted in the top coil car body 25 so that the car can travel in a direction perpendicular to the direction of the car. The cylinder 29 is supported by the side wall of the top coil car body 25 through a notch 30 provided in the side wall of the lifting frame 28 upward from the lower end, and the rod end of the cylinder 29 is connected to the upper part of the lifting frame 28. The elevating frame 28 is configured to be able to be moved up and down along the top coil car body 25 by the telescopic movement of the coil car body 25, and a coil gripper 31 is rotatably mounted on the elevating frame 28. Specifically, the coil gripping machine 31 has a base shaft 33 of a V-shaped arm 32 supported on the lifting frame 28, and a pinion 34 is mounted on the base shaft 33.
The cylinder 3 is equipped with a rack 35 mounted on the lifting frame 28, and a rack 35 that meshes with the pinion 34.
6, and the arm 32 can be rotated by the expansion and contraction movement of the cylinder 36 through the engagement of the rack 35 and the pinion 34, and the intermediate portions of gripping levers 37, 37 are pivotally connected to both ends of the arm 32. A cylinder 38 is provided between the lower ends of the gripping levers 37, 37, and the coil 7 can be gripped by opening and closing the gripping levers 37, 37 by extending and contracting the cylinder 38.

Now coil car 11, bottom coil car 17
The traveling motor 23 is driven to run on the rails 15, 15 in a direction perpendicular to the line L, and the unloader 14 is hooked with a band to prevent unwinding and is moved by a crane.
goes to receive the coil 7 that has been transported to. The coil car 11 that has traveled to the unloader 14 operates the cylinder 38 of the coil gripping machine 31 to grip the coil 7 with the gripping levers 37, 37. The coil car 11 holding the coil 7 moves to the rail 1
5, 15, the rails 24, 24 of the bottom coil car 17 are connected to the rails 12, 1 of the shift truck 5.
Stop at the position corresponding to 2. At this time, the shift truck 5 operates the cylinder 4 to position one rewinding mechanism (the side of the pinch roll 6a in FIG. 2) on the line L.

Next, the traveling motor 26 of the top coil car 18
drive the top coil car 18 to the rail 24,
24 onto the rails 12, 12 of the shift truck 5, and stops between the mandrels 9a, 9b. Subsequently, the cylinder 10a is extended, the mandrel 9a is inserted into the center of the coil 7, and the coil 7 is loaded onto the mandrel 9a. Coil 7 on mandrel 9a
After loading, return the mandrel 9a to its original position on line L. Furthermore, the band is cut with a band cutter on the pedestal 13, and the cut band is placed in a waste receptacle 39.

After that, open the coil 7 with the coil opener 8a.
The end of the strip is unwound and sent to a pinch roll 6a, and the strip pulled out by the pinch roll 6a is sent to a leveler 1, a shear 2, and a welder 3 in order.

Also, during the process, the coil 7 is rewound by the unwinding mechanism on the pinch roll 6a side, and the coil 7 is rewound to the leveler 1.
While being supplied to the subsequent line L, the top coil car 18 returns to the bottom coil car 17,
The same steps as above are carried out to unwind a new coil 7 using the unwinding mechanism on the pinch roll 6b side, and the coil 7 is kept on standby. When the supply of the strip from the unwinding mechanism on the pinch roll 6a side is completed, the cylinder 4 is contracted, the shift cart 5 is moved, and the strip is now supplied from the unwinding mechanism on the pinch roll 6b side. do.

In this way, by sequentially loading the coils 7 into the unwinding mechanisms on the pinch rolls 6a side and 6b side and supplying the strips alternately, it is possible to continuously supply the strips to the ERW tube manufacturing apparatus. Furthermore, since the shift cart 5 is moved in a direction perpendicular to the line L, the distance from the mandrel to the pinch roll is shorter than in the conventional two-mandrel system, making it more efficient.

It should be noted that the present invention is not limited to the above-mentioned embodiments. For example, a shift cart may be provided for each line of coil rewinding equipment, and the shift carts may be connected or fastened to form a coil rewinding device of two systems. It goes without saying that the lines may be moved simultaneously, that they may be moved one series at a time, and that various other changes may be made without departing from the gist of the present invention.

As described above, according to the present invention, (i) two series of coil unwinding mechanisms are provided on a shift truck that can move in a direction perpendicular to the strip supply line in parallel with said line, and one of the coil unwinding mechanisms is connected to one of the unwinding mechanisms; Since the other rewinding mechanism can prepare for supply while the other rewinding mechanism is supplying the strip, the rewinding time can be shortened.

(ii) The distance between the pinch roll and the mandrel is
Since it is shorter than the conventional two-mandrel method, downtime can be reduced and the degree of freedom in space can be increased.

Demonstrates excellent effects such as

[Brief explanation of the drawing]

Fig. 1 is a side view of the electric resistance welded pipe entrance equipment equipped with the device of the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a front view of the coil car, and Fig. 4 is a side view of Fig. 3. 5 is a detailed view of the V section in FIG. 4. L... Strip supply line, 4... Cylinder, 5...
...Shift trolley, 6a, 6b...Pinch roll, 7
...Coil, 8a, 8b...Coil opener,
9a, 9b...mandrel, 11...coil car, 12...rail.

Claims (1)

[Claims] 1. In the entrance side equipment of the strip supply line, a shift cart movable in a direction perpendicular to the line is provided,
On the shift truck, two lines of coil unwinding mechanisms each equipped with various devices such as a mandrel, a coil opener, and a pinch roll for unwinding the strip coil are arranged parallel to the line and facing each other. A coil unwinding device characterized by: