JP2737888B2 - Method of conveying sheared sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shearing sheet on a delivery conveyor of a shearing machine for unwinding a metal strip such as a steel strip or an aluminum strip from a coil and conveying the sheet cut to a predetermined length by a shearer to a piler. And a method of transporting the same.

[0002]

2. Description of the Related Art First, the structure of a metal strip shearing line according to the present invention will be described with reference to FIGS. FIG. 5 is a plan view of a main part of the shearing line, and FIG.
Is a front view, 1 and 3 are pinch rolls, 2 is a leveler, 4 is a shearing machine, 5, 6, and 7 are belt conveyors, S is a steel strip, and C is a sheet after shearing. The steel strip S unwound from the coil by a rewinding machine (not shown) is sent rightward by pinch rolls 1 and 3 and straightened by a leveler 2 and sheared by a shearing machine 4 to form a sheet C, which is a belt conveyor 5 or 6. , 7 are stacked on a piler (not shown), packed and shipped for each lot.

Here, the shearing in the shearing machine 4 is generally performed by a flying shear system in which the steel strip S is moved at a constant speed, and the sheet C after shearing is separated from the steel strip in the rear. The outlet conveyor of the shearing machine is set at a speed slightly higher than the moving speed of the steel strip at the rear. Similarly, the belt conveyors 5, 6, 7 are used to widen the interval of the sheet C for the convenience of downstream inspection and classification. Is usually set to increase sequentially.

[0004] Usually, a single knife (one inclining blade) is used as a shear knife, and shearing is performed in the width direction of the steel strip S from one end to the other end. The sheet on the sheared side is about to be conveyed to the exit conveyor, the remaining side is still connected to the steel strip at the rear, and the separated sheet C is always inclined in the same direction with respect to the line direction and conveyed. (Hereinafter, also referred to as meandering) in this specification. On the other hand, conventionally, for example, a side guide device 9 as shown in FIG. 7 is provided on the exit side of the conveyor to forcibly correct the inclination and perform the piling. When the sheet is guided in a contact manner, a flaw or a surface break occurs on the sheet, which is not preferable in quality.

Therefore, according to Japanese Patent Application Laid-Open No. 50-114777, a suction device 10 such as a magnet is provided on the back surface of a conveyor (for example, the belt conveyor 6 in FIGS. In the example of FIG. 5, it has been proposed to adsorb A (for B on the delay side) and forcibly synchronize with the conveyor to correct meandering. In the meandering correction device, since the suction device 10 itself does not move in synchronization with the conveyor, even if the sheet C is instantaneously sucked onto the conveyor surface by suction, the suction force acting on the sheet C is small. Yes, the speed difference between the belt conveyors 5 and 6 is very large, the center of gravity of the sheet C is still on the rear belt conveyor 5, and only the stage where the moving speed of the sheet C is synchronized with the speed of the belt conveyor 5 is effective. There was a problem that it did not work.

[0006]

SUMMARY OF THE INVENTION The present invention solves such a problem and reliably corrects the inclination of a sheet on a conveyor to feed the sheet in a correct direction. The purpose is to eliminate the occurrence.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a shearing line for shearing a metal strip into a predetermined length to form a sheet. One belt conveyor is constituted by a pair of belt conveyors which are divided into two in the width direction and driven independently of each other, and a sheet suction device is provided on the back surface of each of the two divided conveyor belts in the width direction. A pair of detectors provided on both sides of the advancement of the sheet detect passage of the leading end of the sheet, and decelerate the belt conveyor on the side of the pair of belt conveyors that first detects passage of the leading end of the sheet. A method for conveying a sheared sheet, wherein the meandering of the sheet is corrected by increasing the suction force of the suction device on the decelerated side.

[0008]

According to the present invention, the leading end of a sheet conveyed at an angle is detected separately on the left and right sides, and the preceding conveyor is decelerated, and is pressed against the conveyed conveyor belt by the suction device. As a result, the inclination can be forcibly corrected, and can be sent to the piler in the correct direction on the conveyor, so that generation of flaws due to the side guides can be prevented.

[0009]

【Example】

Embodiment 1 A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view showing the vicinity of a conveyor in a steel strip shearing line of this embodiment, and FIG. 2 is a front view likewise. The same reference numerals are used for the same components as those described above, and 5, 6 and 7 are belt conveyors, 9 is a side guide device, 10 is a suction device, and 11 is a detector. Each belt conveyor, particularly the belt conveyor 7 including the suction device 10, is divided into two in the width direction with respect to the center of the line, and is constituted by a pair of independently driven belt conveyors 7a and 7b. The driven belt pulleys 71a and 71b are independently controlled. Belt conveyors 6, 7
A pair of left and right detectors 11a and 11b for detecting the presence or absence of a sheet C passing therethrough are provided in the middle of the pair. As the detector 11, an optical detector using a laser, natural light, or the like is generally used. Since the shearing target is a steel strip, an electromagnet is most suitable as the suction device 10, but a vacuum method or the like may be used. The suction devices 10 are also provided in a pair on the left and right.

When the sheared sheet C moves on the belt conveyor 6 in a meandering manner as shown in FIG. 1 and reaches the belt conveyor 7, it is detected by the detectors 11a and 11b. The leading side of the leading ends A and B of the sheet C is detected first, and the conveyor on the previously detected side is decelerated, the suction force of the suction device 10 is increased, and the leading side is braked. Correct the meander. Therefore, even if the sheet C enters the side guide device 9 as it is, the edge portion of the sheet C contacts the side guide very little and scarcely occurs.

In a line where the inclination is not so large, the deceleration of only one side of the conveyor has a certain correction effect, and the generation of flaws is reduced. Performing both the suction by the apparatus can surely correct the meandering of the sheet regardless of the inclination of the line. Embodiment 2 A second embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a plan view showing the vicinity of the conveyor in the steel strip shearing line of this embodiment, and FIG. 4 is a front view likewise. The same reference numerals are used for the same components as those described above. Reference numeral 8 denotes a belt conveyor called a magnet conveyor provided above a transition portion between the belt conveyors 6 and 7. When the moving sheet C transfers to the next conveyor (belt conveyor 7), the leading end of the sheet C hangs down. It serves to lift the leading end of the sheet upward so that the sheet does not fall below the conveyor or hit the conveyor. In this embodiment, the magnet conveyor 8 is divided into two right and left conveyors 8a and 8b in the traveling direction, and the suction device 10a,
10b, and belt pulleys 81a and 81b for driving the respective conveyors are also controlled independently. Belt conveyors 5, 6
Detector 11 for detecting the presence or absence of sheet C passing therethrough
a and 11b are provided. The suction device 10 is an electromagnet.

When the sheared sheet C moves on the belt conveyor 5 in a meandering manner as shown in FIG. 3 and reaches the belt conveyor 6, it is detected by the detectors 11a and 11b. The leading side of the leading ends A and B of the sheet C is detected first, and the magnet conveyor 8 of the previously detected side is detected first.
The speeds of a and 8b are reduced, and the suction force of the suction devices 10a and 10b is increased to apply a brake to the leading side to correct meandering. Even if the sheet C enters the rear side guide device 9 in this state, the edge of the sheet C contacts the side guide very little, and scars are hardly generated.

[0013]

According to the present invention, the meandering of the sheet is reliably corrected on the conveyor and the sheet is sent out in the correct direction, and the occurrence of flaws at the sheet edge by the side guide device or the like is eliminated.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a front view showing the embodiment of the present invention.

FIG. 3 is a plan view showing another embodiment of the present invention.

FIG. 4 is a front view showing another embodiment of the present invention.

FIG. 5 is a plan view showing a conventional technique.

FIG. 6 is a front view showing a conventional technique.

FIG. 7 is a perspective view showing a conventional technique.

[Explanation of symbols]

 1, 3 pinch roll 2 leveler 4 shearing machine 5, 6, 7 belt conveyor 8 belt conveyor (magnet conveyor) 9 side guide device 10 adsorption device 11 detector S steel strip C sheet

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-57-67444 (JP, A) JP-A-55-96821 (JP, U) JP-B-57-20221 (JP, B2)

Claims (1)

(57) [Claims] In a shearing line in which a metal strip is sheared into a predetermined length to form a sheet, at least one of the belt conveyors that convey the sheet that has been sheared from the output side of the shearing machine to a piler has a width of at least one. A pair of belt conveyors that are divided into two in the direction and driven independently of each other, and a sheet suction device is provided on the back surface of the conveyor belt that is divided into two in the width direction. A pair of detectors provided on both sides detect the passage of the leading edge of the sheet, and among the pair of belt conveyors, the belt conveyor on which the leading edge of the sheet is detected first is decelerated, and the suction on the decelerated side is performed. A method for conveying a sheared sheet, comprising: increasing a suction force of an apparatus to correct meandering of the sheet.