JPH07112211A - Method and apparatus for passing steel strip - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a method and an apparatus for stably performing striping at the entrance side of a process line for processing steel strips. [Structure] In the method of winding a coiled steel strip around a payoff reel and threading the strip into a processing line while straightening the tip of the strip through the payoff leveler, the payoff leveler is opened to remove the steel strip. The step of sending to the exit side, the step of closing the payoff leveler and correcting the steel strip and pulling back to the entrance side, opening the payoff leveler,
It is a steel strip threading method that consists of sending the tip of the steel strip to the exit side and then passing it through the processing line.The steel strip entry side of the payoff leveler can be expanded and contracted in parallel with the pass line. This is a steel plate passing device in which a telescopic cylinder is provided and a magnet attraction device is attached to the tip of the telescopic cylinder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for stably passing a strip at a process line for processing a strip steel strip or at an entrance side of a rolling mill.

[0002]

2. Description of the Related Art Conventionally, as a stripping apparatus installed on a process line for processing strip steel strips or on an inlet side of a rolling mill, an apparatus as shown in FIG. 2 has been generally used. That is,
When the coil 1 mounted on the pay-off reel 4 is wound and passed through the line, the steel strip 2 is fed into the pay-off leveler 5 while sliding on the strip-passing table 3.

In the payoff leveler 5, the steel strip 2 is flattened in the warp and bend at the tip by pressing down the tip thereof, thereby preventing the roll 7 from being caught in the processing line following the payoff leveler 5. It Regarding the operation of the payoff leveler 5, the payoff leveler 5 should be used at the time of boarding.
Open, the warped steel strip 2 is threaded into the payoff leveler 5, and when the tip of the steel strip 2 reaches the final straightening roll 5a of the payoff leveler 5, the striping is temporarily stopped, and FIG. As shown in (4), the threading is restarted with the payoff leveler 5 closed and rolled down.

[0004]

However, although most of the coils 1 can be passed through stably by the above-mentioned conventional method, when the warp of the tip of the coil 1 is large, the payoff leveler 5 as shown in FIG. 4 is used. There is a problem that the tip of the steel strip 2 gets into the gap between the inner straightening rolls 5a.

Even if the above-mentioned state occurs, there is a problem that the payoff leveler 5 is closed and the strip steel strip 2 is fed more and more by applying a pressure reduction. It is an object of the present invention to provide a steel strip threading method and apparatus for solving the above problems.

[0006]

SUMMARY OF THE INVENTION The present invention is a method of winding a steel strip wound in a coil around a payoff reel and straightening it through a payoff leveler while passing it through a processing line. A step of opening the payoff leveler and sending the steel strip to the exit side, and a step of closing the payoff leveler and straightening the steel strip back to the entry side,
The steel strip stripping method comprises the steps of opening the pay-off leveler, feeding the tip of the steel strip to the exit side thereof, and then stripping it through the processing line.

Further, in a plate passing device for passing a steel strip through a line having a pay-off reel, a plate passing table and a pay-off leveler, it is possible to extend and contract parallel to the pass line on the entrance side of the pay-off leveler. A steel strip passing device comprising a cylinder and a magnet attracting device attached to the end of the telescopic cylinder.

[0008]

[Operation] According to the present invention, in order to prevent the tip of the strip steel strip from being caught by the straightening roll in the payoff leveler, the strip steel strip can be expanded and contracted in parallel with the pass line of the steel strip installed on the entrance side of the payoff leveler. Since the magnet attraction device is installed at the tip of the telescopic cylinder, the tip of the steel strip is attracted by the magnet and forced to pass through the payoff leveler by the telescopic cylinder and taken to the payoff leveler exit side. There is no need to worry about getting stuck in the straightening roller.

Further, the tip of the steel strip is brought to the exit side of the payoff leveler, the magnet attracting device is pulled out of the payoff leveler, the payoff leveler is closed, the payoff reel and the payoff leveler are rotated in the reverse direction, and the inside of the payoff leveler is rotated. Since the steel strip is moved in the backward direction and the tip of the steel strip is straightened by the payoff leveler, the straightening roller in the payoff leveler does not get stuck.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing the configuration of the plate passing apparatus of the present invention. As shown in the figure, a telescopic cylinder 9 supported by a frame 10 is installed on the entrance side of the payoff leveler 5, and a magnet attraction device 8 is attached to the tip of the telescopic cylinder 9.

The magnet attracting device 8 attached to the tip of the telescopic cylinder 9 also extends to the exit side of the payoff leveler 5 when the telescopic cylinder 9 extends to the exit side of the payoff leveler 5 in parallel with the steel strip 2. When the telescopic cylinder 9 is movable, the magnet attracting device 8 is retracted to a position where it does not interfere with the steel strip 2.

First, when the magnet attracting device 8 advances by the telescopic cylinder 9 and reaches the entrance side of the payoff leveler 5, the steel strip 2 that has been threaded to the entrance side of the payoff leveler 5
Contact with. In this state, the magnet exciting device (not shown) is energized, the electromagnet of the magnet attracting device 8 is turned on, and the steel strip 2 is lifted.

Next, by holding the telescopic cylinder 9 to the extension limit with the magnet excitation device being excited,
The tip of the strip steel strip 2 can be carried to the exit side of the payoff leveler 5. When the telescopic cylinder 9 reaches the extension limit, the magnet exciting device is de-energized, the magnet is turned off, the telescopic cylinder 9 is contracted, and the magnet attracting device 8 is pulled outside the entrance side of the payoff leveler 5.

The magnet attracting device 8 is a payoff leveler 5.
When I retracted outside, press down with the payoff leveler 5,
The tip of the steel strip 2 is straightened. At this time, by rotating the pay-off reel 4 and the pay-off leveler 5 in reverse, the tip of the steel strip 2 is returned to the exit side of the pay-off leveler 5 and the tip of the steel strip 2 is caught by the straightening roll 5a. The tip can be straightened without

Furthermore, if the pay-off leveler 5 is opened and reversely rotated after the leading end is straightened to carry out the striping, the stripping can be performed without being stuck to the straightening roll 5a.

[0016]

As described above, according to the method and apparatus for passing a steel strip of the present invention, it is possible to surely pass a steel sheet of any steel type without sticking the leading end to the straightening roll. As a result, troubles such as facility stoppage due to the interruption are completely eliminated.

Further, the operator has conventionally performed monitoring work during strip passing, but since trouble does not occur, this monitoring work can be omitted and labor is saved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of a plate passing apparatus of the present invention.

FIG. 2 is an explanatory view showing a conventional strip passing device.

FIG. 3 is an explanatory diagram in which the leveler is in a closed state.

FIG. 4 is a schematic diagram showing a state in which the tip of a steel strip is caught on a straightening roller in a payoff leveler in a conventional apparatus.

[Explanation of symbols]

 1 coil 2 steel strip 3 threading table 4 payoff reel 5 payoff leveler 6 threading conveyor 7 roll 8 magnet attracting device 9 telescopic cylinder 10 frame 11 photo sensor

Claims (2)

[Claims] 1. A method of winding a steel strip wound in a coil shape on a payoff reel and passing the steel strip to a processing line while straightening the tip end of the steel strip through the payoff leveler. After sending the strip to the exit side, closing the payoff leveler and straightening the steel strip back to the entry side, opening the payoff leveler, and sending the steel strip tip to the exit side, A method for passing a steel strip, which comprises a step of passing the steel strip to a processing line. 2. A plate passing device for passing a steel strip through a line having a pay-off reel, a plate passing table, and a pay-off leveler, wherein the pay-off leveler can extend and contract in parallel with a pass line. A steel strip passing device comprising a cylinder and a magnet attraction device attached to the end of the telescopic cylinder.