JPH05294534A - Cut steel plate conveying device - Google Patents

Abstract

PURPOSE:To control the operational timing of a classifying gate with high accuracy by arranging a plurality of magnetic type object detecting sensors in a row along the carrying direction in the vicinity of the carrying surface of a conveyor, thereby executing continuous tracking of the respective positions of the cut steel plates. CONSTITUTION:After a metal strip 1 is uncoiled from the original coil, it is moved to a traveling shear (S) (cutter) and successively cut to make cut plates 2 of the specified length. In the preceding process of the shear (S), flaws of the strip 1 are detected by a flaw-detecting device, and gradation is made according to the degree of the flaws. Thus, the cut plates 2 after being cut are carried by a carrying conveyor 3, and classified into a first and a second carrying passages 9,10 through a classifying gate 8 according to the gradation. Where, a plurality of magnetic type object detecting sensors 7 are arranged in a row with the specified pitch on the lower side of the carrying conveyor 3, and continuous tracking of the position of the respective cut plates 2 is executed according to the detected signal, and the operational timing of the gate 8 is controlled thereby.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel plate cutting plate conveying apparatus suitable for use in a system for conveying a steel plate cutting plate by a conveyor.

[0002]

2. Description of the Related Art Generally, this type of steel plate cutting plate conveying apparatus is
A pulse generator such as a rotary encoder is attached to the drive shaft of the conveyer, and the amount of movement of each cutting plate, that is, the conveying position is tracked by counting the output pulses of the pulse generator. Then, the gate is switched in the route switching unit, and the attributes (good
It is configured to switch to a predetermined route (sampling, reject route, etc.) in accordance with defective products, grades depending on the degree of defects, etc.).

There is also known a configuration in which a proximity switch is provided in front of the path switching unit and the gate is switched by detecting the arrival of each cutting plate by turning the proximity switch on and off. Further, the position of each cutting board is also tracked by combining a pulse generator attached to the drive shaft and each output of a proximity switch provided near the path switching unit.

[0004]

In the above-mentioned conventional cutting plate conveying apparatus, since a cutting plate conveyed at high speed is conveyed while causing a phenomenon of jumping up due to vibration and stagnation due to friction on the conveyor, the pulse generator is used. In the position detection using the or proximity switch, a large error was sometimes involved. For this reason, if you control the transport path switching gate of the cutting plate only by the output of these sensors, you cannot pass the cutting plate to be rejected and pass it to the pass line side, or the operation timing does not match, Occasionally, there was a problem that the cutting board was caught in the entrance of the gate.

Such troubles may lead to serious troubles in quality control such that defective products are mixed into non-defective products, damage to the gate mechanism, stop of the entire transfer line, etc., resulting in great damage. There was something. On the other hand, there is a dilemma that if the line speed is reduced to prevent a reject error, the productivity is reduced.

Therefore, efforts have been made to reduce the error occurrence rate by finely adjusting the line transport speed and the switching gate operation timing, but this adjustment work takes time and causes a trouble occurrence rate. It didn't decrease sharply. As described above, there is a limit to the high precision of the gate control by the conventional device, and it is the current situation that it is not possible to meet the needs of the times such as high line speed and high quality control.

In view of the above points, the present invention is to provide a steel plate cutting plate conveying apparatus capable of always accurately tracking the conveying position of a cutting plate which may cause a position change on the conveyor. Has a purpose.

[0008]

In order to achieve the above object, a steel sheet cutting plate conveying apparatus of the present invention is provided with a plurality of magnetic object detection sensors in the vicinity of the conveying surface of a conveyor along the conveying direction. By arranging in rows, the positions of the steel plate cutting plates can be continuously tracked, and the operation timing of the switching gate can be controlled with high accuracy.

As the object detection sensor, a radiation type, a sound wave type, an optical type, etc. are known in addition to the magnetic type. However, the radiation type has a problem in safety management. Is too wide and inferior in accuracy. The optical system has a problem that it is difficult to attach it to the lower side of the conveyor. Therefore, the apparatus of the present application employs a magnetic object detection sensor.

[0010]

The steel plate cutting plate conveyed on the conveyor is sequentially detected by a plurality of magnetic object detection sensors arranged in the vicinity of the conveying surface of the conveyor along the conveying direction at predetermined intervals. At this time, the position of the steel plate cutting plate can be detected at least as accurately as the installation interval of each object detection sensor.

If the operation of the switching gate is controlled according to the position detection result, the transport path of the cutting plate can be surely switched at a precise timing.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the accompanying drawings. FIG. 1 is a principle diagram showing the overall configuration of a transport device for a steel plate cut plate of the present application, FIG. 2 is a flowchart of a tracking method for the steel plate cut plate of the present application, FIG. 3 is a block diagram showing a control system of the device of the present application, and FIG. 4 is a magnetic sensor. It is sectional drawing which shows an attachment state.

In FIG. 1, 1 is a strip (metal strip).
Then, the strip 1 is rewound from the original coil and then runs, is transferred to a shear (cutting machine) S, and is sequentially cut into a cut plate 2 having a predetermined length. The shear S
In the previous step, after detecting an internal or surface defect of the strip 1 by a flaw detector (not shown), the cutting plate attribute determination unit 20 performs grading according to the degree of the defect. There is. That is, the cut cutting plate 2 is classified into a good product (with a grade), a defective product, a sample plate, a scrap plate, and the like according to the inspection result, and the classification information is transmitted from the determination unit 20 to the controller 21. The appropriate processing according to the attribute can be received in the subsequent process (FIG. 3).

Reference numeral 3 designates a conveyer conveyor provided at the rear stage of the shear S. The conveyer 3 is composed of two conveyors 3a and 3b which link the area from the vicinity of the shear S to the distribution section 4, and the conveyer 3 Thus, the cutting plate 2 cut by the shear S can be transferred to the cutting plate distribution unit 4. Reference numeral 5 is a pulse generator provided on the drive shaft of the conveyor 3. The pulse generator 5 generates a pulse according to the number of rotations of the drive shaft, and the controller 21 counts the number of pulses to move the conveyed object (cutting plate in this embodiment) on the conveyor. The position can be indirectly determined. Pulse generator 5
As a specific configuration, a digital processing system using a rotary encoder is preferable, but a position detection system using a speed generator or the like may be used.

Reference numeral 6 is a proximity switch for directly detecting the cut plate on the conveyor.
It is provided on the upper side of the front of the distribution unit 4 (on the side of the shear S) so that it can be confirmed that the cutting plate 2 has approached the distribution unit 4. The output of the proximity switch is also transmitted to the controller 12 and used as auxiliary data for tracking together with the output of the pulse generator 5. As a specific configuration of the sensor 6, a non-contact type object detection sensor such as an optical type, an electrostatic type or a magnetic type is desirable, but a contact type sensor linked with a micro switch or the like may be used. The position detection accuracy of the cutting plate 2 of the conventional device using only the proximity switch 6 is about 40 mm.

Reference numeral 7 is a magnetic object detection sensor (hereinafter referred to as a magnetic sensor), and the magnetic sensor 7 is the conveyance conveyor 3
On the lower side, a plurality of pieces are arranged at regular intervals along the transport direction of the cutting plate 2. In this embodiment, the magnetic sensor 7
Are arranged in rows at a pitch of 10 mm, the position detection accuracy of the magnetic sensor 7 can be at least about 10 mm. Of course, the installation interval of the magnetic sensor 7 may be appropriately determined according to the desired detection accuracy.

Here, as shown in FIG. 4, the magnetic sensor 7 has a metal plate 11 on the lower side of the transfer surface of the transfer conveyor 3b.
Is fixed through. A horseshoe-shaped magnet 12 is provided on the metal plate 11 so that the magnetic sensor 7 is located at the center of both magnetic poles. This is to reduce the influence of magnetic disturbance by forming a magnetic closed path with the horseshoe-shaped magnet 12 and the metal plate 11, and to cut the plate 2 on the conveyor 3b.
This is for allowing the magnetic sensor 7 to detect with high sensitivity only the change in magnetic flux due to the presence or absence of.

Reference numeral 8 is a gate provided in the distribution unit 4, and the gate 8 is opened / closed by a command from the controller 21 via a distribution gate control unit 22 to move the cutting plate 2 into the first conveyance path. The route can be switched to either 9 (for example, a good product path) or the second transport path 10 (for example, a defective product path). R is a guide roller.

In the conventional device, the operation timing of the gate 8 is determined only by the signals of the pulse generator 5 and the proximity switch 6, but in the present embodiment, it is determined mainly by the signals of the plurality of magnetic object detection sensors 7. It is configured to be controlled based on the cut plate position information. That is, as shown in the flowchart of FIG. 2, the pulse generator 5 and the proximity switch 6 are used to refer to the approximate position of the cutting plate 2 (steps S1 and S2), while a plurality of magnetic sensors arranged in a line in the transport direction are arranged. 7, the movement of the cutting plate 2 is detected every 10 mm (step S3), and the operation timing of the gate 8 of the distribution unit 4 can be precisely determined (step S4).

In the above embodiment, the cutting plate 2 cut from the strip 1 by the shear S and its quality characteristics were determined.
Are sequentially conveyed to the distribution unit 4 by the conveyors 3a and 3b. While the outline position of each of the cut plates 2 conveyed is detected by the pulse generator 5 and the proximity switch 6, the cut plates 2 are sequentially detected by a series of magnetic object detection sensors 7 and each position is highly accurate within 10 mm. Is tracked. Then, the operation timing of the gate 8 in the distribution unit 4 is accurately determined based on the tracking information of each of the cutting plates 2.

For this reason, the timing adjustment of the gate 8 in the distribution unit 4 of the transfer line can have a margin by the amount of the error factor of the position detection, and the time required for the adjustment work can be greatly shortened. .. According to the operation test in the actual line, it was found that the adjustment work, which took about one week with the conventional device, can be shortened to about 3 to 4 days by introducing the device of the present application.

In the above embodiment, it goes without saying that the magnetic sensor 7 may be installed over the entire length of the conveyor so that the cutting plate 2 is constantly tracked.
By using the pulse generator 5 and the proximity switch 6 in an appropriate combination as in the present embodiment, the equipment cost can be reduced.

[0023]

As described above, according to the steel plate cutting plate conveying apparatus of the present invention, a plurality of magnetic object detection sensors are arranged in a row in the conveying direction near the conveying surface of the conveyor.
Each position of the steel plate cutting plate can be continuously tracked, and the operation timing of the distribution gate can be controlled with high accuracy.

As a result, the excellent effects of improving productivity by greatly shortening the adjustment work of the sorting apparatus and improving the reliability of the line by preventing troubles at the switching gate are simultaneously exhibited.

[Brief description of drawings]

FIG. 1 is a principle diagram showing an overall configuration of a steel plate cutting plate transporting apparatus of the present application.

FIG. 2 is a flowchart of a method for tracking a steel plate cutting plate of the present application.

FIG. 3 is a block diagram showing a control system of the device of the present application.

FIG. 4 is a cross-sectional view showing a mounted state of a magnetic object detection sensor.

[Explanation of symbols]

 1 Strip (Steel Plate) 2 Cut Plate 3 Conveyor Conveyor 4 Sorting Unit 7 Magnetic Object Detection Sensor 8 Gate 9 First Conveyance Path 10 Second Conveyance Path 11 Metal Plate 12 Horseshoe Magnet S Shear

Claims (1)

[Claims] 1. A conveying device for a steel plate cutting plate, comprising a plurality of magnetic object detection sensors arranged in a row in the conveying direction in the vicinity of a conveying surface of a conveyor.