JPH0317569B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a coil tip drawing device with an opening head.

[Prior art and its problems] As is well known, a strip coil is a strip rolled in a rolling mill and wound into a coil shape.
When such a coil is processed (pickling, plating, etc.) in a stripping facility, a coil tip drawing device is used to pull out the coil tip. That is, once the strip has been wound up, the tip of the strip coil is bent back by an opening head equipped with a nose bending device, and the tip of the strip is caught in a pinch roll and pulled out.

Conventionally, many proposals have been made for shortening the operation time and automating such a coil tip drawing device. For example, in Japanese Patent Publication No. 48-13231,
A band cutting device for cutting the band tied around the outer circumference of the strip coil is arranged so as to be able to move in and out of the front of the strip coil in the direction of movement so as to serve as a guide for the strip, and the cut band is sent out together with the strip while rotating the strip coil.
This is adsorbed to a magnet roll and pulled out using a band pinch roll, and the tip of the strip is pulled out from a horizontal table of a band cutting device using a strip pinch roll, thereby reducing the operation time for pulling out the tip of the strip. A shortened version is introduced.

However, in this proposal, the band cutting device has a structure with an opening knife at the tip of a horizontal table, so if the strip coil has a different diameter, it is difficult to pull it out reliably, and there are also difficulties in automation. be.

Furthermore, in Japanese Patent Application Laid-Open No. 59-19029, a slidable frame is suspended from a cart that reciprocates in the horizontal direction, and an opening head equipped with a strip coil tip detection device and a clamp device are attached to the lower end of the frame. A device has been introduced that is equipped with a nose bending device and a nose bending device to cause the cart to run and the frame to slide according to the difference in coil diameter, thereby automating the drawing out of the tip of the coil.

However, in this proposal, the strip coil on the payoff reel drum is pulled out and the opening head is placed on standby in front of the pinch roll, so that it is suitable for an entry side device that processes one coil at a time. During the payoff operation on the payoff reel drum,
After pulling out the leading end of the trailing strip coil on the coil car cradle in front of the payoff reel drum, it is difficult to do this because the opening head gets in the way when it is left waiting in front of the pinch roll for unwinding the leading strip coil. becomes.

[Means for Solving the Problems] Therefore, the present invention was created for the purpose of eliminating the problems of the prior art, and in particular, it aims to shorten the handling time of standby coils on the strip processing line. , which aims to automate the operation of pulling out the tip of the coil, and in which the tip of the succeeding coil is pulled out and put on standby in front of the preceding coil while the preceding coil is being unloaded. A cart that reciprocates in the direction of the coil pass line is provided with an opening head that can at least move up and down and is equipped with a clamp and a nose bending device, and a clamp device is provided in front of the pinch roll for discharging the preceding coil. An object of the present invention is to provide a coil tip drawing device with an opening head, characterized in that a table is provided at the front stage, which is extendable and retractable in the direction of the pass line of the coil, and which is retractable from the pass line.

[Example] The structure of the present invention will be explained in detail with reference to an example shown in the accompanying drawings together with its operation.

The leading strip coil 1 is pivotally supported by the payoff reel drum 2, and the pressure roll 3
The paper is rewound while its outer circumferential portion is pressed, and is delivered through the pinch rolls 4. Meanwhile, the subsequent strip coil 6 placed on the cradle roll 5 of a coil car (not shown) rises until it hits the snubber roll 7. The snubber roll 7 is driven by an electric motor 9 via a chain 8. Note that the cradle roll 5 is also driven by an electric motor (not shown).

Further, a table frame 10 is disposed at the front stage of a clamp device to be described later, that is, between the clamp device 16 and the snubber roll 7. The table frame 10 is guided by a table base 11 and is moved by a cylinder (not shown) in a direction perpendicular to the path line of the strip coil (in a direction perpendicular to the plane of the paper).
It is supported so that it can move forward and backward.

An entry table 13 and an exit table 12 are provided on the table frame 10.
The tables 12 and 13 are moved forward and backward toward the entrance and exit sides by cylinders 14 and 15, respectively, and are expandable and retractable. The clamp device 16 is arranged in front of the pinch roll 4 (on the entrance side). Furthermore, the trolley 17 has rails 18 attached to the pedestal 19.
The cylinder 20 runs on the strip coil in the direction of the path line of the strip coil. Note that the pedestal 19 is attached to the foundation or the frame of an adjacent machine.

The opening head 21 is guided by a cylinder 22 to a guide rod 28 and moves up and down in the range from A to C. The opening head 21 is provided with an opening knife 25 and a nose bending device 26 around a roller 29.
These are rotatable by a cylinder 27. The clamp 23 is guided by a guide rod 28 and moved up and down by a cylinder 24. Reference numeral 30 indicates a support frame for the pressure roll 3.

Next, its effect will be explained.

While the preceding strip coil 1 supported by the payoff reel drum 2 is being paid out, the following strip coil 6 placed on a cradle roll 5 provided on a coil car (not shown) rises until it hits the snubber roll 7 and stops. . In this state, the opening head 21 is lowered until point C or until the roller 29 hits the strip coil 6. At this time, the tables 12 and 13 are placed within the path line of the strip coil 6 in a contracted state.

Next, when the opening head 21 stops, the opening knife 2 is moved by the cylinder 27.
5 to bring the tip of the opening knife 25 into contact with the surface of the strip coil 6.

At this time, the tip of the coil is moved between the snubber roll 7 and the knife 25 in advance.

Next, the snubber roll 7 and cradle roll 5 are driven to rewind the tip of the coil 6 to a position past the roller 29. In this state, the clamp 23 is lowered and the tip of the coil 6 is clamped, and then the opening head 21 and the clamp 23
At the same time (while still clamped) raise to point B. At this position, the cylinder 27 is operated and the tip of the coil is bent by the nose bending device 26. When the opening head 21 reaches point B, the tables 12 and 13 are extended and the clamp device 16 is opened.

Next, the carriage 17 is run along the path line of the strip coil, the clamp 23 is released at point D, and the opening head 21 is moved from E to F and then to A. On the other hand, the tip of the strip coil 6 released at point D is connected to the entrance table 13.
The material is dropped onto the surface and is sent to the clamping device 16 via the output table 12 by the driving of the snubber roll 7 and cradle roll 5, where it is clamped by the clamping device 16 and put on standby.

In this state, the table frame 10 is retracted outside the strip coil pass line. When the preceding strip coil 1, which is pivotally supported on the payoff reel drum 2, is unwound, the clamping device 16 is released, and the pinch roll 4 is driven to send the tip of the strip coil 6 to the exit side while the coil car is moved to the center of the pay-off reel drum 2, the subsequent strip coil 6 is pivotally supported on the drum 2, and the pay-off of the strip coil 6 is started.

In this state, the strip coil 6 becomes the leading strip, and the coil car that passed the strip coil 6 to the payoff reel drum retreats to its original position, and the tip of the next succeeding strip coil is pulled out in the same process as described above.

[Effects of the Invention] While the preceding strip coil is being unloaded, the tip of the succeeding coil is pulled out by the opening head and is kept on standby in front of the pinch rolls, so that the handling time for the strip coil can be shortened. Of course, in such a coil tip drawing device, a table is provided on which the pulled out succeeding strip is placed to stabilize the movement of the coil, and the table is also capable of expanding and contracting along the pass line and retracting from the pass line. By extending and retracting the table, it is possible to freely move and adjust the position of the opening head, and even if the diameter of the strip coil is different, the tip can be reliably opened and clamped. The tip of the strip coil can be pulled out reliably to carry it to the top.

Furthermore, the table enters the path line of the strip coil only when necessary, and retreats when unnecessary, so it does not interfere with the movement of the coil car.

[Brief explanation of drawings]

The drawings show schematic illustrations of embodiments of the invention. 1, 6... Strip coil, 4... Pinch roll, 12, 13... Table, 16... Clamp device, 17... Dolly, 21... Opening head, 23... Clamp, 26... Nose bending device.

Claims (1)

[Claims] 1. In a coil tip pull-out device that pulls out the tip of a succeeding coil and waits in front of the preceding coil during unloading work of the preceding coil, a clamp and a nose bending device are attached to a cart that reciprocates in the direction of the coil pass line. In addition to providing an attached opening head that is movable at least vertically, a clamping device is provided in front of the pinch roll for discharging the preceding coil, and a clamping device is provided in front of the clamping device that is extendable and retractable in the direction of the coil pass line and is retracted from the pass line. A device for drawing out the tip of a coil with an opening head, characterized in that it is equipped with a table that can