JPH0732039A - Device, attached with tip end detector, for straightening curl at tip end of sheet steel coil - Google Patents

Abstract

PURPOSE:To enable a pick finding with a magnet conveyor and to improve workability and productivity by detecting the tip end of a coil, positioning the tip end and then straightening the curl of the tip end of the coil. CONSTITUTION:A coil 3 is revolved clockwise by a cradle roller 2; the difference of the surface level at the tip end of the coil is detected by a coil tip end detector 8; and at the point where the tip end 1 of the coil is bitten in the cradle roller 2, the cradle roller 2 is stopped to position the tip end 1 of the coil. Then, a band for binding the coil is cut and removed by a band processing device. After that, a straightening roller 5 is retreated; and with a camber imparted to the tip end 1 of the coil in between a fixing roller 6 in the direction opposite to the curl, the cradle roller 2 is revolved to pull out the tip end of the coil. Consequently, the tip end 1 of the coil is squeezed and the curl at the tip end of the coil is completely removed. The advancing quantity of the straightening roller 5 is detected by a revolution counter attached to the revolving center of a swing arm 7 and is adjusted by the degree of the curl.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin steel coil tip curl correction device for correcting curl at the coil tip in various manufacturing processes for handling coils.

[0002]

2. Description of the Related Art A typical method of tapping a coil on the entry side of various manufacturing process lines that handle coils such as cold rolled steel sheet, hot rolled steel sheet, and plated steel sheet will be described with reference to FIGS. Coil 3 placed on the coil skid 15
Is transferred onto the cradle roll 2 by the coil car 14, the position of the coil tip is positioned by rotating the cradle roll 2, and then the coil binding band 16 is cut manually or by the band processing device 17, After attaching the coil to the pay-off reel 18,
The tip end 1 of the coil is attracted to the magnet conveyor 20 and is caught in the pinch roll 19.

However, in the magnetic conveyor type output device as shown in FIG. 5, the coil tip 1 of the coil supplied from the payoff reel 18 for winding the coil tip 1 is not attracted to the magnet conveyor 20 and is output. Since it is not possible, the tip of the coil may not be able to be caught in the pinch roll 19. Such a phenomenon is likely to occur in a relatively thick coil having a plate thickness of more than about 2 mm, and as an apparatus for correcting the winding curl at the tip of the coil, for example, it is disclosed in Japanese Utility Model Laid-Open No. 5-13609 as shown in FIG. There is a corrective device. This orthodontic device
On the cradle roll 2 on which the coil 3 for correcting the curl of the coil tip is placed, and on the carriage 12 moving in a direction perpendicular to the axial direction of the cradle roll, a coil tip opening knife 4 and a coil tip guide are provided. It is a thin steel plate coil tip winding curl straightening device comprising a guide 13 and a straightening device provided with a coil tip curling straightening roll 5.

[0004]

However, the above-mentioned conventional method has the following problems. (1) It is necessary for an operator to visually rotate the cradle roll until the coil tip is caught in the cradle roll so that the coil tip does not hang down when the coil binding band is cut. They go out and perform the above work, which is an obstacle to automatic operation and labor saving on the entry side of the line. (2) Since the stop position of the truck changes depending on the size of the coil diameter, it is difficult to keep the contact pressure between the coil tip opening knife and the coil low. When the coil is rotated by the cradle roll, the outer circumference of the coil is flawed. There was a fear of entry.

(3) In the conventional method, since the correction device is mounted on the trolley, the number of parts such as the drive device of the trolley, cable bear, wheels and rails, which are not shown in FIG. 3, is large and the equipment cost is high. The present invention is made to solve the above problems, and is a compact that detects the position of the coil tip, positions the coil tip, and then corrects the curling of the coil tip so that it can be taken out by a magnet conveyor. It is an object of the present invention to provide a thin steel plate coil tip winding curl correction device.

[0006]

SUMMARY OF THE INVENTION The present invention is a cradle roll with a tachometer on which a coil for correcting the curling of the tip of a coil is mounted, a curling straightening roll having a coil tip detector built-in, and this straightening roll. From an oscillating type straightening mechanism equipped with a coil tip opening knife having a center of rotation on the same axis as the axis and a straightening roll paired with the straightening roll, which gives curling in the opposite direction and curls in the opposite direction. It is a thin steel plate coil tip winding curl straightening device with a tip detector.

[0007]

The thin steel coil tip winding curl correction device of the present invention is a straightening roll having a tip detector built-in and a coil tip opening opening knife installed on a swing arm, and a straightening roll on a coil placed on a cradle roll. The coil is rotated in the state of being contacted with, the coil tip is detected by the tip detector, the rotation of the coil is stopped, and the coil tip is positioned.

Subsequently, after the coil binding band is cut and removed by a band processing device, the coil is rotated in the opposite direction,
Open the coiled tip with a coil tip opening knife and feed it out by the length of the coil tip to be straightened, then retract the swing arm and reverse the winding with the fixed roll. With the warp in the given direction, by rotating the cradle roll and pulling out the coil tip, the curl of the coil tip is completely removed, and therefore the curl of the coil tip can be corrected extremely smoothly. In addition, since it is not necessary for the worker to leave the operator's cab, it is effective in saving labor.

Further, the contact angle when the knife contacts the outer circumference of the coil is substantially constant regardless of the size of the coil diameter, and the contact pressure can be adjusted by the spring, so that there is no concern about flaws on the outer circumference of the coil. In addition, the movement of the straightening roll is a swing arm system, and coil tip detection and tip straightening
Since it is performed by the book straightening roll, the device can be simplified and the facility cost can be reduced.

[0010]

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a straightening device of the present invention. In the figure, the cradle roll 2 is a device for supporting and rotating the coil 3 for correcting the curling of the tip of the coil, and includes a tachometer (not shown) for detecting the rotational movement amount of the coil. The tachometer may be any one such as a tacho generator or a PLG (pulse generator).
The straightening roll 5 is mounted on a swing arm 7 having a rotation center parallel to the axial direction of the cradle roll 2,
The swing arm 7 is swung by a fluid pressure cylinder 9 arranged orthogonal to the center of rotation, so that the straightening roll 5 can be brought into contact with the outer circumference of the coil on the cradle roll.
The swing mechanism is not limited to the fluid pressure cylinder, but an electric cylinder or a fluid pressure motor may be used.

A fixed shaft 11 fixed to the swing arm 7.
The tip detector 8 is installed on the fixed shaft 11, and the straightening roll 5 rotatably attached to the fixed shaft 11 contacts the outer circumference of the coil. Therefore, regardless of the size of the coil diameter, a gap (detection distance) between the tip detector 8 and the outer circumference of the coil. Is always constant, and the detection surface of the tip detector is parallel to the outer circumference of the coil within a range of ± 5 °, so that the detection accuracy of the coil tip 1 is excellent. In the present embodiment, a magnetic step such as an eddy current sensor is used to detect a step on the outer circumference of the coil and recognize it as the coil tip, but it is also possible to recognize the coil tip by a stylus method or a reflection method.

Next, the coil 3 is rolled by the cradle roll 2.
Is rotated clockwise, the step of the coil tip is detected by the coil tip detector 8, and when the coil tip 1 is caught in the cradle roll 2, the cradle roll 2 is stopped and the coil tip 1 is positioned. After that, the coil binding band is cut and removed by a band processing device (not shown).

FIG. 2 shows a coil tip opening knife of the present invention. The coil tip opening knife 4 contacting the outer circumference of the coil is a device for pulling out the coil tip 1 from the outer circumference of the coil on the cradle roll by rotating the coil 3 counterclockwise by the cradle roll 2. The length is detected by a tachometer attached to the cradle roll 2. The contact angle when the knife 4 contacts the outer circumference of the coil is almost constant regardless of the size of the coil diameter,
The contact pressure can be adjusted by the spring 10.

After that, the straightening roll 5 is retracted, and the cradle roll 2 is rotated to pull out the coil tip while the warp in the opposite direction to the winding of the coil tip 1 with the fixed roll 6 is provided. As a result, the coil tip 1 is squeezed, and the curling of the coil tip is completely eliminated. The pushing amount of the straightening roll 5 is detected by a tachometer (not shown) attached to the center of rotation of the swing arm 7, and is adjusted by the size of the coil winding.

The coil tip curl correction device applied to a relatively thick coil has been described above. However, since a thin coil has less coil tip curl, it is often unnecessary to correct the coil tip. In that case, the straightening roll may be retracted when the positioning of the tip of the coil is completed, and when the coil is thin, the knife for opening the tip of the coil and the fixed roll are not necessary. Further, the coil tip detector does not have to be built in the straightening roll, but can be installed in a cradle roll or the like.

[0016]

According to the present invention, the positioning of the tip of the coil and the curl correction of the tip of the coil are fully automated, which saves labor in the line entry side work. In addition, since the winding of the tip of the coil is eliminated, the magnetic conveyor is smoothly exposed, and workability and productivity are improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a thin steel coil tip winding curl straightening device with a tip detector according to the present invention.

FIG. 2 is an explanatory view showing a coil tip opening opening knife of the present invention.

FIG. 3 is an explanatory diagram showing an example of a conventional thin steel plate coil tip winding curl straightening device.

FIG. 4 is a plan view showing a typical equipment arrangement on the entry side of various manufacturing process lines that handle coils.

FIG. 5 is a front view showing a typical equipment arrangement on the entry side of various manufacturing process lines that handle coils.

[Explanation of symbols]

 1 Coil Tip 2 Cradle Roll 3 Coil 4 Coil Tip Opening Knife 5 Straightening Roll 6 Fixed Roll 7 Swing Arm 8 Coil Tip Detector 9 Fluid Pressure Cylinder 10 Spring 11 Fixed Axis 12 Bogie 13 Induction Guide 14 Coil Car 15 Coil Skid 16 Band 17 Band processing device 18 Payoff reel 19 Pinch roll 20 Magnet conveyor

Claims (1)

[Claims] 1. A cradle roll with a tachometer on which a coil is mounted, a curling straightening roll having a built-in coil tip detector, and a coil tip opening knife having a rotation center on the same axis as the axis of the straightening roll. A thin steel coil coil tip winding with a tip detector, characterized by comprising an oscillating type straightening mechanism, and a straightening roll paired with the straightening roll, and a fixed roll giving a warp in the opposite direction. Straightening device.