JPS586653B2 - Coil unwinding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an unwinding device for a coil wound with a steel plate.

Generally, a long steel plate is wound into a coil and stored, and then milled to undergo rolling or surface treatment.

At this time, the coil must be unwound.

A coil unwinding device is used at this time.

In conventional coil unwinding equipment of this type, the coil is attached to an unwinding reel called a payoff reel, and unwinding of the steel plate starts from the surface layer, but once unwinding is finished, the equipment is stopped. A new coil needs to be installed.

The time it takes to install a new coil is a total waste of time, and the availability of the device is significantly reduced.

Therefore, the next coil to be unwound is kept waiting,
A coil unwinding device has been proposed in which the next coil is unwound immediately after the previous coil is unwound.

However, even if such a structure is adopted, in the conventional device, it takes time to open the next new coil, and the problem of idle time has not been solved.

The present invention was made in view of the above circumstances,
To provide a coil unwinding device that does not take time to open a coil and can significantly shorten idle time.

Hereinafter, details of the present invention will be explained in conjunction with embodiments shown in the drawings.

1 and 2 explain the schematic structure of the apparatus of the present invention. In the figures, the reference numeral 1 indicates a chain conveyor, 22 indicates a bar that moves in the axial direction, and the coil C is located at the left end in FIG. The coil car 2, which has the role of conveying the coil to the limit position of the coil force -2, is arranged so as to be able to freely run via wheels 4 on a rail 3 provided at the end of the chain conveyor 1 and perpendicular thereto. has been done.

One of the wheels 4 is a driving wheel, and as is clear from FIG. It is also rotated in the direction.

Further, an elevating table 8 is arranged on the cart 5, and this elevating table 8 is equipped with a hydraulic cylinder 10 housed in a support frame 9 provided in a downwardly protruding state at the bottom of the cart 5.
It is raised and lowered by

A rotating arm 11 is rotatably supported on one end of the lifting platform 8, and this rotating arm 11 is connected to a rotating lever 12.
A motor 13 is mounted on the rotating lever 12, and a chain 15 is stretched between the motor 13 and a pressing roller 14 provided at the tip of the rotating arm 11.

The rotating lever 12 is rotated by a cylinder (not shown) or the like, and presses a pressing roller 14 against the back surface of the coil C to rotate the coil.

A pair of drive rollers 16 and 17 are rotatably supported on the lifting platform 8, and a chain 19 is stretched between these drive rollers via a group of chain wheels 18. , a chain 21 is stretched between the output shaft of a motor 20 provided on the lifting platform 8, and rotates the coil C in cooperation with the pressing roller 14.

The drive rollers 16, 17, motor 20, etc. constitute a coil unwinding drive device.

Since the coil car 2 is configured as described above, the center of rotation of the coil C is always maintained at the same position when the hydraulic cylinder 10 is operated to move the elevator platform 8 up and down.

Note that the driving rollers 16, 17 and the pressing roller 14 are
In FIG. 3, it moves between the positions indicated by the solid line and the two-dot chain line.

On the other hand, a coil transfer bar 22 having a V-shaped cross section is slidably provided on the same axis as the conveyor, facing the chain conveyor 1 with the coil car 2 in between. It is inserted between the chain conveyor 1 and the coil C, supports the coil C, moves backward, and is transferred onto the coil force-2 which is at the leftmost position in FIG.

By the way, in FIG. 2, what is indicated by the reference numeral 23 at the right end position of the movement of the coil force -2 is a payoff reel, and as is clear from FIG. 1, they are arranged facing each other on the same axis.
It is configured to be able to move in the axial direction so that it can fit into the center of the coil C.

A guide table 24 is provided on the side of this payoff reel 23.
is placed, and plays the role of peeling off and guiding the steel plate when the steel plate is opened.

Further, a straightening roll 25 is arranged above the unwinding preparation position of the coil car 2 shown in FIG.

The straightening roll 25 consists of three rollers 26 to 28 as shown in FIGS. 4 and 5, with two rollers 2 on the lower side.
6 and 27 are arranged, and one roller 28 is arranged above between both rollers 26 and 27.

These rollers 26 and 27 are suspended horizontally between frames 29, and the upper roller 28 is rotatably supported on a bearing 31 that can be raised and lowered by a hydraulic cylinder 30.

A shaft 32 that supports the bearing 31 is mounted so as to be finely adjustable in the vertical direction by a worm gear mechanism 33.

Further, the lower rollers 26 and 27 can be pulled out in the axial direction together with a movable trolley 36 provided with a motor 34 and a speed reducer 35 for rotating them.

That is, the movable trolley 36 is movably mounted on rails 38 laid on a base 37 via wheels 39, and is further mounted on a hydraulic cylinder rod 4 (not shown).
0 and can be pulled out in the axial direction.

A roller 41 for pressing the tip of the steel plate is arranged on the side of the straightening roll 25, and serves to press the steel plate coming out of the straightening roll 25 against the starting end of an id table 43, which will be described later.

Also, among the lower rollers, the roller 26 on the introduction side of the steel plate
On the side, there is a guide piece 4 that is coaxial with this and can be rotated idly.
2 is installed.

On the other hand, above the payoff reel 23 is a guide table 4.
3 is provided.

As shown in FIG. 6, this guide table 43 is provided in an inclined state with the straightening roll 25 side facing downward, and has an introduction part 44 on its starting end side and a guide part 45 on its rear end side. is provided.

The guide portion 45 is provided so as to be extendable and retractable by a hydraulic cylinder 46 provided below the guide table 43.

This guide table 43 is connected to the rollers 26 and 2.
Similarly to 7, by a hydraulic cylinder (not shown),
Together with the guide plate 47, it can be pulled out to the side in the axial direction of the payoff reel 23 and positioned outside the unwinding locus of the steel plate.

Furthermore, a pinch roller 48 and a magnet 49 are arranged at the tip of the guide part 45 of the guide table 43, and these can be lowered in the direction of the pinch roller 50 located below by a hydraulic cylinder (not shown) or the like. .

The magnet 49 is used to temporarily attract and hold the tip of the steel plate unwound from the coil C in the unwinding preparation position.

The reference numeral 51 is a mill that performs surface processing and rolling, such as a skin pass mill. 6 The steel plate that comes out of this mill passes through a group of guide rollers 52, and then the steel plate is bent in the opposite direction. The film passes through a curved roll 53 and is wound onto a take-up reel 54.

Next, the operation of this embodiment configured as above will be explained.

First, when a steel plate is unwound from the coil C attached to the payoff reel 23 and rolled by the mill 51 after passing through 50 vinyl rollers, the next coil C is conveyed by the chain conveyor 1. The coil force received by the bar 22 and traveling on the rail 3 -
Transfer coil C onto 2.

The coil force -2 that received the coil C moves to the unwinding preparation position, which is approximately the center of the rail 3, as shown in FIG.

At this position, the cropped end of the steel plate is connected to the driving roller 1.
6, and the back side of the coil C is pressed by the pressing opening 2 14, so the steel plate is smoothly unwound along the circumferential surface of the coil C by the action of the drive rollers 16 and 17. The steel plate is moved on the guide table 43 while being straightened by the straightening rolls 25, and is stopped with the tip of the steel plate positioned at the tip of the guide table 43.

At this time, the upper pinch roller 48 and magnet 49 are in the upper position.

Then, the magnet 49 descends and the guide table 43
Hold the tip of the steel plate above.

The preparation for the next coil C is now complete.

In this state, when the unwinding from the payoff reel 23 is completed, the payoff reel 23 is opened to both sides in the axial direction, and at the same time, the lower rollers 26 and 27 of the correction roll 25 and the guide table 43 are moved in the axial direction of the payoff reel 23. move it to the side and away from the traveling trajectory of the steel plate.

Next, lower the pinch roller 48 and magnet 49, lower the tip of the steel plate to 50 parts of the pinch roller, raise the magnet 49 a little to separate it from the steel plate, and then
At the same time as the coil car 2 is rotated, the coil car 2 is moved to the right in FIG. 2, and the steel plate of the coil C is sent out in the direction of the mill 51.

At this time, if the speed at which the steel plate is fed out by the vinch rollers 48, 50 and the forward speed of the coil car 2 are made the same, the unwound portion of the coil C will not sag, and the steel plate will be fed out in a taut state.

When the coil force -2 and the center position of the payoff reel 23 coincide, the payoff reel 23 moves in the axial direction and holds the coil C.

In this way, unwinding of the next coil continues.

After this, the coil force -2 is returned to the original position, and the pinch roller 48
, the magnet 49, the rollers 26, 27, the guide table 43, etc. are returned to their original states, and one cycle of operation is completed by waiting for the next cycle.

As is clear from the above description, according to the present invention, during the unwinding operation of one coil, the next coil can be brought into the unwinding preparation state. The time loss is extremely small, and the next coil can be unwound immediately, and the operating efficiency of coil winding work and rolling can be greatly improved with a relatively simple device.

In the present invention, since the coil is moved laterally using a coil car while maintaining the coil as it is, the coil is not damaged and the cropped end of the coil can be moved laterally while being kept at a constant position.

In addition, by matching the speed at which the unwound steel plate at the tip of the coil is moved forward between pinch rolls and the forward speed of the coil force, the coil can be moved to the unwinding position with the steel plate always kept taut. Because you can
You can immediately proceed to the next operation.

In addition, in the present invention, since a pressing roller that can press the back side of the coil is provided, even if the tip cropping position of the coil is immediately above and to the left of the driving roller in FIG. 3, the coil is unwound in the clockwise direction. Even if the coil is suddenly turned in the rotational direction, the cropped end of the coil smoothly enters the upper straightening roll along the outer circumferential surface of the coil.

Moreover, since there is no need to detect the position of the tip croft, automatic operation can be easily performed.

Furthermore, in the present invention, a straightening roll is provided above the coil winding position, and while straightening the bend of the unwound coil,
Since the unwound portion of the coil is sent onto the guide table, the unwound portion of the coil is sent onto the guide table with its curl straightened.

Therefore, unwinding the coil does not take up much space and is not dangerous, and the cropped end of the coil can be securely held by the magnet, and automatic operation can be easily performed.

Further, in the present invention, since a magnet that can be raised and lowered is provided at the tip of the guide table, the guide table can be moved backward while holding the steel plate with the magnet.

Therefore, the steel plate will not fall or twist sideways, and will not be scratched, generate noise, or interfere with subsequent rolling.

Of course, when moving the steel plate held above by the magnet to the pinch roll position below, the steel piece can be gently lowered while continuing to be held by the magnet.

[Brief explanation of the drawing]

1 and 2 are an overall plan view and a front view showing an embodiment of the present invention, FIG. 3 is a front view of the coil force unit, and FIGS. 4 and 5 are a front view of the straightening roll ( (partial cross section)
and a side view, and FIG. 6 is a longitudinal sectional view of the guide table. 1...-Chain conveyor, 2...Coil car, 3...Rail, 5...Dolly,
8... Lifting platform, 14... Pressing roller,
16, 17... Drive roller, 22...
Bar, 23...Payoff reel, 25...
・・Correcting roll, 36 ・・・Moving trolley, 43・・・
...Guide table, 48, 50... Vinci roller, 49... Magnet.

Claims (1)

[Claims] 1. It is movably provided between a position for receiving a coil wound with a steel plate, a coil unwinding preparation position and a position for installing the coil on a payoff reel and unwinding the coil, and is connected to the coil unwinding drive device and the coil unwinding position. A coil unit equipped with a pressing roller that can press the back surface, a straightening roll that corrects the bending of the coil that is placed above the coil unwinding preparation position, a guide table that is placed above the payoff reel, and a guide table that is placed above the payoff reel. A pinch roller and a magnet are provided above the tip part so as to be movable up and down, and a lower roller and a guide table constituting the coil straightening roll are provided so as to be movable in the axial direction of the payoff reel. Coil unwinding device.