JPS6082549A - Detecting and processing device for continuously transported half-overlapped thin material - Google Patents

Abstract

PURPOSE:To control the operation timing of a processing unit according to the transport amount per unit time by disposing a free roller where a thin material runs on conically and passes in the midway of a conveyer for conveying thin materials such as newspaper or the like in a half-overlapped manner, and by providing an optical detector. CONSTITUTION:A free roller 2 projected over the conveying surface is disposed at a newspaper detecting point in a conveyer 1 for conveying newspaper P in a half-overlapped manner. An optical detector 4 is adapted to detect a wedge- shaped gap 3 between adjacent newspapers, which is produced when the newspaper P runs on the free roller 2. Newspaper detection signals (c) of the detector 4 are counted in a fixed period by the first counter 9, and pulses little smaller than the above period are counted by the second counter 16 operated in response to the detection signal (c). When the count value of the counter 16 amounts equal to a preset value set according to an output of the counter 9, an output is generated from a comparator 13 to obtain an operation timing signal.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a detection and processing device for processing thin half-stacked objects that are being continuously conveyed by a conveyor, such as picking out the required number of copies from a newly opened sheet of paper for inspection. Regarding.

Conventionally, an automatic sampling device has been used to sample the newspaper, but when the conveyance speed is high and fluctuates, the operation timing of the sampling device has not been automatically adjusted according to the conveyance amount per unit time. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a detection processing device that automatically adjusts the operation timing of a processing device for processing semi-overlapping thin objects that are continuously transported in accordance with the transport amount per unit time.

The present invention provides a free roller on which the thin objects pass in a mountain-like manner during the conveyance of a conveyor that conveys the thin objects in a half-stacked state, and during the running of the thin objects, the front side generated between the front and rear thin objects is An optical detector that transmits light from the side of the conveyor through the open wedge-shaped gap detects the passage of each of the thin objects, and a first counter intermittently counts the detection signals at regular intervals. This count value is proportional to the amount of thin material conveyed within a unit time.

Using this count value as an address signal, a preset numerical signal is generated from the memory in response to the count value, and on the other hand, a second counter that starts operating in response to the detection signal counts pulses with a period much smaller than the above-mentioned fixed period. When the count value of the second counter and the numerical signal are compared by a comparator, the output of the comparator lags behind the detection signal by an appropriate amount of time depending on the amount of conveyance per unit time.Using this, the output of the comparator is The present invention is characterized in that an operation/timing signal for processing the thin object being conveyed is obtained according to the amount of transport of the thin object per unit time.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, newspapers P are conveyed by a chain conveyor 1 in a half-stacked state in the direction of the arrow.

The conveyor 1 has a plurality of chains spaced apart from each other,
Ili! A free roller 2 projecting upward from the chain is provided at a newspaper detection point during feeding. When the newspaper P gets over the free roller 2, a wedge-shaped gap 3 is created between the newspaper P1, which has already gotten over most of it, and the following newspaper P]2 that is on the way up. When the newspaper P2 advances further and the first half hangs down, the gap 3 disappears.

Therefore, as shown in FIG. 2, a fiber-type reflective phototube 4, for example, is provided as an optical detector on an example of the conveyor 1, and its light emitting element 5 and light receiving element 6 are directed toward the gap 3. At this time, if the gap 3 is generated by the passage of the newspaper P, there is no reflected light, and if the gap 3 disappears, the reflected light enters the light receiving element 6, so a detection signal is obtained from the phototube 4 for each part of the newspaper P. It will be done.

FIG. 3 shows the speed of the conveyor 1 or the unit time Il! of the newspaper extracting device provided at a predetermined position of the conveyor 1. ! A block diagram of a starting circuit that operates with appropriate starting timing according to the amount of feed is shown. To explain below with reference to the timing chart of FIG. 4, the pulse generator 7 is 0.511z
pulse a of
and pulse a, and the first counter 9 inputs the pulse C while the AND gate 8 is in the pulse a for 1 second at a 2 second cycle. This count value is the number of newspapers conveyed per second.

The delay circuit 10 provides the latch circuit 11 with a launch pulse d having a period of 2 seconds, which is generated at the falling edge of the pulse a, as a clock input, and thereby the latch circuit 11 inputs the signal of the count value of the counter 9 and converts it into 2 seconds. Hold for a latch period of seconds. The counter 9 is cleared by a pulse e generated from the delay circuit 10 several microseconds later than the latch pulse d.

The memory 12 inputs the number of newspapers per second signal n held by the latch circuit 11, and stores the number of newspapers signal as an address.
is output to the comparator 13. The newspaper signal n indicates the speed of the conveyor 1 or the amount of conveyance per unit time, and the operating timing of the newspaper extraction device must be earlier as the speed of the conveyor 1 or the amount of conveyance per unit time increases. Therefore, the numerical signal m indicates that the signal n is It is determined experimentally in consideration of n, the characteristics of the sampling device, etc., so that the larger the value, the smaller the value.

When the newspaper detection signal C is input to the flip-flop 14 and its set output f is input to the AND gate 15,
The pulse b is counted by the second counter 16. The count signal g of the counter 16 is compared with the numerical signal m in the comparator 13, and when the two are equal, the timer 17
operates and outputs a pulse h of approximately 10 m5.

The pulse h serves as a signal to start the operation of the newspaper extraction device, clears the counter 16, and also clears the flip-flop 1.
Reset 4. The pulse width of pulse h is approximately 10m5
This is because the period of the detection signal C is about 45 ms at maximum, and during that time the flip-flop 14 and the counter 1
This is to make 6 to 7 soto or cre-1. Therefore, if the reset or clear is possible, 45 rn s
The pulse width may be set to the following appropriate pulse width.

When the present invention is actually operated, the detection signal C is being counted for one second after the power is turned on, so the pulse h is not generated.
When the operator presses the newsprint removal push button one second later, the newspaper is removed.

The present invention has the above-mentioned configuration, and the conveyor conveys 11 sheets continuously in a half-overlap state! Thin objects being fed can be reliably and easily detected without disturbing the flow, even if the thickness of the thin object or the per-step feeding speed changes, and the thin object can be processed according to the number of thin objects detected within a unit time. This has the effect of automatically adjusting the timing at which the device starts operating.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partial side view showing the behavior of a thin object that falls on a thin object detection point, FIG. 2 is a perspective view for explaining the arrangement of an optical detector, and FIG. 3 is a block circuit. Figure, 4th
The figure is a timing chart diagram of the various signals in FIG. 3'. 1... Conveyor 2... Free roller 3... Wedge-shaped gap 4... Optical detector 9... First counter 12
...Memory 13...Comparator 16...Second
Counter P... Thin agent Patent attorney Yuyoto - 1 other person

Claims (1)

[Claims] During the conveyance of the conveyor, which conveys the thin objects in a half-stacked state, a free roller is provided on which the thin objects pass in a mountain shape, and a wedge-shaped gap is provided between the thin objects in front and behind each other during the picking up. The optical detector emits light and the detection signal of the optical detector is detected at a certain period. ζ Instead of intermittently repeating the count, a preset numerical signal is generated for the count value of the first counter and the first counter. a second counter that is activated by the detection signal and counts pulses whose period is much smaller than the certain period; and an output when the count value of the second counter becomes equal to the set numerical signal. a comparator, and obtains an operation timing signal for processing the thin object being transported according to the amount of transport per unit time of the thin object from the output of the comparator,
Detection and processing device for half-stacked thin objects during continuous conveyance.