JPH028575Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a leveler mark adhering material detection device.

A device for supplying a strip material to a press machine or the like includes a group of straightening rolls, and a leveler that unwinds the strip material wound around a drum to correct curling curls and continuously feeds the strip material at a required speed; It is equipped with a feeding device that intermittently feeds the coil material sent from the leveler into a press machine or the like in a predetermined amount at a time. If the leveler stops due to a temporary stop of operation of the press machine after such a strip material supply device is driven, the pressing force caused by the leveler's straightening roll and the straightening roll and strip shape that occur when the leveler stops or starts driving will be affected. Due to slips between the materials, marks from the straightening rolls, or so-called leveler marks, are left on the strip material. Since this leveler mark is necessarily small, it has been very difficult to detect the mark itself.

This invention was made in view of the above circumstances, and it is possible to detect that material with a leveler mark has been sent to a predetermined position in a press machine without detecting the leveler mark itself. The present invention provides a leveler mark adhering material detection device.

The leveler/mark adhering material detection device according to this invention is equipped with a group of straightening rolls, and includes a leveler that unwinds the strip material wound around a drum to correct the curl, and sends out the strip material, and a leveler that feeds out the strip material. In a strip material supply device equipped with a feeding device that intermittently feeds a predetermined amount of coiled material to a press machine etc., the length of the strip material between the leveler and the press machine is memorized when the leveler stops. means for sequentially subtracting the predetermined amount from the stored length of the strip each time the strip is intermittently fed by the predetermined amount by the feeding device; The present invention is characterized by comprising means for detecting that a marked strip is fed into a press machine.

Since the leveler mark adhering material detection device according to this invention has the above-described configuration, the leveler mark attached part of the strip material is detected by the press machine without detecting the leveler mark itself. It is possible to detect that it has been sent to a predetermined position. Based on this detection, it is possible to detect that the workpiece with the leveler mark has reached a predetermined position on the workpiece conveyance line, and to remove the workpiece with the leveler mark.

Hereinafter, embodiments of this invention will be described in detail with reference to the drawings.

In FIG. 1, a strip W is wound around a rotatably supported drum 1. As shown in FIG. The leveler 2 is equipped with straightening rolls 3 arranged in two rows, upper and lower, in a straight line.
is sent out continuously. The feeding device 4 is located in front of the leveler 2 and includes a pair of upper and lower feeding rolls 5, whereby the strip material W sent from the leveler 2 is conveyed by a required constant amount S in synchronization with the operation of the press machine 6.
(hereinafter referred to as feed amount) is intermittently fed into the press machine 6. A pit 7 is provided at an intermediate position between the leveler 2 and the feeding device 4. This pit 7 loosens the strip material W in a semicircular arc shape so that the strip material W has play in response to a discrepancy in the instantaneous value of the feeding speed of the strip material W between the leveler 2 and the feeding device 4. It is for. Inside this pit 7,
A slack amount detector 8 is arranged to detect the position of the lowest end of the circular arc-shaped slack portion w of the strip material W. This detector 8 consists of five photoelectric detectors 8a, 8b, 8c, 8d, and 8e arranged vertically on the front and rear walls of the pit 7.
It becomes more.

In front of the press machine 6, a piler 9 holds the workpiece Wa cut into predetermined lengths by the press machine.
Alternatively, a processed product transport device 11 for transporting the processed product to the defective product collection case 10 is installed. The processed product transport device 11 includes a switching conveyor 12 provided in front of the press machine 6 and a defective product transport conveyor 13 provided in front of the switching conveyor 12. The switching conveyor 12 has two positions: a horizontal defective product feeding position (indicated by a chain line P2 in FIG. 1), and an inclined normal product feeding position (indicated by a chain line P2 in FIG. Solid line P1 in Figure 1
A conveyor tilting device (not shown) swings the conveyor between two positions (indicated by ). The piler 9 is installed at a lower position slightly forward of the switching conveyor 12, and the defective product collection case 10 is installed at a lower position at the front end of the defective product conveyor 13. When the switching conveyor 12 is at the normal product feeding position P1, the workpiece guide inclined chute 9a extends from a position immediately below the front end of the switching conveyor 12 to the piler 9. The switching conveyor 12 is normally located at the normal product feeding position P1.

FIG. 2 shows the control device for the switching conveyor tilting device.

This control device 20 includes a calculation device 21. Preferably, the arithmetic unit 21 is a microprocessor. The arithmetic device 21 has a storage device 22 . When the leveler 2 stops, a leveler stop signal is input to the calculation device 21 from the drive control device 3a of the straightening roll 3 of the leveler 2, and a leveler stop signal is inputted to the calculation device 21 from the drive control device 5a of the feed roll 5 of the feed device 4. A strip material feeding signal is input every time the belt is driven intermittently. In addition, each slack amount detector 8a~
The detection signal from 8e is also input. Arithmetic device 21
outputs a switching signal to be sent to the switching conveyor tilting device 12a. When this switching signal is sent, the tilting device 12a moves the switching conveyor 12 to position P1.
to P2 or from position P2 to P1.

The storage device 22 stores the feed amount S of the feed device 4, the length U of the strip material W between the rear end position A and the front end position B of the leveler 2, the front end position B of the leveler 2, and a predetermined position in the press machine 6. Areas are provided for storing the length L of the strip material W between the position, for example, the processing position C, and the number of times N of feeding by the feeding device 4 (the number of times the feeding roll 5 is driven). The length L of the strip material W is
Depending on the position of the lowest end of the slack part w of the strip material W
Five items, La, Lb, Lc, Ld, and Le, are determined and memorized in advance. The length U and feed amount S of the strip W are also determined and stored in advance.

FIG. 3 shows the processing procedure of the arithmetic device.

While the leveler 2, feeding device 4, press machine 6, and conveyors 12 and 13 are in operation (the switching conveyor 12 is in the normal product feeding position P1), the press machine 6 is stopped, and the leveler 2 It is also assumed that the feeding device 4 is also stopped. Then, the drive control device 3a of the straightening roll 3 outputs a leveler stop signal. When this stop signal is sent, data storage processing is performed. First, the length L of the strip material W located between positions B and C is selected from among La to Le based on the detection signals of the respective detectors 8a to 8e, and is stored in the storage device 22 (step 31).
Also, set the content N of the number of feeds to zero (Step 3)
2). Hereinafter, the part of the strip W that was inside the leveler 2 when the leveler stopped is referred to as the leveler mark attachment part.

Thereafter, when the operation of the press machine 6 is restarted and the leveler 2 and the feed device 4 are driven accordingly, and the strip material W is fed by the feed amount S, a strip material feed signal is output from the feed roll control device 5a. be done. When this sending signal is input, data calculation processing is performed. First, 1 is added to the content N of the number of times of sending (step 41). Then, the calculation L-{(N+1)·S} is performed, and it is determined whether the result of this calculation is smaller than zero or not (step 42). If the calculation result is greater than or equal to zero, a feed signal from the feed roll drive control device 5a that is outputted in conjunction with the next drive of the feed roll is input (step 43). When the feed signal is input (YES in step 43), step 41
Return to , add 1 to the content N of the number of feeds, and set this N
L-{(N+1)·S} is calculated again using , and it is determined whether the calculation result is smaller than zero. (Step 42). Then, the processes of steps 43, 41, and 42 are repeated until the calculation result becomes smaller than zero.

L-{(N+
1).S} becomes smaller than zero. When the calculation result becomes smaller than zero in step 42, a switching signal is sent to the conveyor tilting device 12a (step 44). As a result, the switching conveyor 1
2 is from the normal product feed position P1 to the defective product feed position P2
Move to.

After that, the feed roll 5 is driven and the strip material W is fed by the feed amount S, and when a feed signal is input from the drive control device a (YES in step 45), 1 is added to the content N of the number of feeds (step 45). 46).
Then, the calculation (L+U)-{(N+1)·S} is performed, and it is determined whether the result of this calculation is smaller than zero or not (step 47). If it is not smaller than zero, steps 45, 46, and 47 are repeated until the calculation result becomes smaller than zero in step 47, similar to steps 43, 41, and 42 described above.

After the switching conveyor 12 is switched to the defective product feeding position P2 in step 44, the strip material W is fed and the operation of the press machine is restarted, when the number of times the drive roll 5 is driven (the number of times it is fed) reaches ni. Assuming that the rear end of the leveler mark attachment part is sent forward from position C in )-{(N-1)·S} becomes smaller than zero. At this time, the processed product including the rear end of the leveler mark attachment area has already been sent to the switching conveyor 12 and transferred to the defective product conveyor 13.

When the content N of the number of feeds becomes n(i+1) and the calculation result in step 47 becomes smaller than zero, a switching signal is output to the tilting position 12a (step 48). As a result, the switching conveyor 12
It moves from the defective product sending position P2 to the normal product sending position P1.

After the switching conveyor 12 is switched to the defective product sending position P1 in step 44, the process starts in step 48.
By the time the strip material W is returned to the normal product feeding position P1, the part of the strip material W that includes the leveler mark attachment part has been pressed, and the processed product is sent to the defective product conveyor 13 by the switching conveyor 12. .
Therefore, all processed products with a leveler mark are transferred to the defective product collection case 10 by the conveyor 13.
sent to.

In this embodiment, in step 42, when the number of feeds N reaches a value satisfying L-{(N+1)・S}>0, the switching conveyor 12 is switched to the defective product feeding position P2. - A formula other than the above formula may be used as long as it is used to detect that the workpiece is not transferred to the processed product conveyor 12 including the front end of the mark attachment part. Similarly, in step 47, the number of feeds N is calculated using the formula (L+U)-
When the value that satisfies {(N-1)・S}<0 is reached, the switching conveyor 12 is returned to the normal product feeding position, but the processed product including the rear end of the leveler mark attachment part is not transferred to the switching conveyor 12. A formula other than the above formula may be used as long as it is used to detect that the defective product has been transported from the conveyor 12 to the defective product transport conveyor 13.

In addition, although the strip material supplying device in this embodiment is formed with a pit for keeping the strip material slack, the strip material supplying device without such a pit can also have a leveler mark according to this invention. It can also be applied to an adhering part detection device. In addition, a switching conveyor is used to store defective products in a defective product case, but when a magnetic conveyor is used and a defective product is transferred onto the defective product case, the excitation of the magnet is released. You can do it like this. Further, in consideration of the responsiveness of the switching operation of the switching conveyor, the press may be stopped for a predetermined period of time before switching. Furthermore, in this embodiment, the length of the strip material between the leveler and a predetermined position of the press machine is determined based on the photoelectric detector, but the length of the strip material is determined based on the feed amount of the leveler and the feeding device. Alternatively, the value may be calculated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the processing line of the press machine, FIG. 2 is a block diagram showing the control device of the conveyor tilting device, and FIG. 3 is a flow chart showing the processing means for the calculation results. 1... Drum, 2... Leveler, 3... Straightening roll, 4... Feeding device, 5... Feeding roll, 6...
Press machine, 7... pit, 8a to 8e... slack amount detector, 21... arithmetic unit, 22... storage device, 3a... straightening roll drive control device, 5a...
Feed roll drive control device.

Claims (1)

[Scope of utility model registration request] A leveler is equipped with a group of straightening rolls, which unwinds the strip material wound around the drum to straighten the curl, and sends out the strip material, and the coil material sent from this leveler is sent to a press machine, etc. in the required fixed amount. In a strip material feeding device equipped with a feeding device that feeds intermittently, there is a means for memorizing the length of the strip material between the leveler and the press machine when the leveler stops; Means for sequentially subtracting the predetermined amount from the stored length of the strip each time a predetermined amount is intermittently fed, and a strip with a leveler mark based on the subtracted value is fed into the press machine. A leveler mark adhering material detection device comprising means for detecting the presence of a leveler mark.