JPS5828626B2 - Miscount prevention device for paper sheet counting machines - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for preventing erroneous counting of paper sheet counters.

Conventional machines have the disadvantage that when starting to count paper sheets, an extra pulse signal may be generated and input to the counter due to reasons described below, resulting in erroneous counts.

The present invention has been made with the aim of eliminating this drawback.

First, the general structure and operation of the conventional machine, especially the above-mentioned drawbacks of the counting mechanism, will be explained with reference to FIGS. 1 and 2.

FIG. 1 is a plan view of the main parts such as the rotary cylinder 1, the holding device 2, and the counting mechanism 3.

The rotary cylinder 1 is driven by a motor (path shown) and rotates about a shaft 6 in the direction of force indicated by an arrow A during counting.

Five suction shafts 43 to 4 are arranged on the same circumference on the upper surface of the rotating cylinder 1.
e is arranged to be able to rotate in the direction of arrow X during counting.

At a position corresponding to each of the suction shafts 4a to 4e, in the illustrated example, at the outer circumference of the rotary cylinder 1 in the axial direction of the shaft 6, and at each suction shaft 43.
Five iron pieces 5a to 5e are fixed near the bottom of 4e.

These iron pieces 5a to 5e constitute a counting pulse generation mechanism 3 together with a non-contact switch 7 fixed at a position where each iron piece 5a to 5e can be detected.

Further, a holding device 2 is provided beside the rotating cylinder 1 and the counting pulse generating mechanism 3.

This holding device 2 consists of a holding plate 8 and a holding member 9,
When the bundle of paper sheets 10 is set between the holding plate 8 and the presser member 9, this set state is detected by a photoelectric detector (the path shown in the figure), and the holding plate 8 is moved to the presser member 9 side by this detection signal. A paper bundle 10 is held between a holding plate 8 and a pressing member 9.

At this time, the free end 10a of the bundle of paper sheets 10 comes into close contact with the suction port (path shown) of the suction shaft 4b in the illustrated example, and as a result, the pressure of the vacuum pump (path shown) connected to the suction shaft 4b increases. When the pressure becomes negative, the vacuum switch 11 (Fig. 2) is turned on.
The rotary cylinder 1 begins to rotate in response to this ON signal, and counting begins.

Next, the configuration of the counting circuit of the conventional device will be explained with reference to FIG. 2. The output signal (2) of the vacuum switch 11 is sent to a gate circuit 13 consisting of an AND gate.

In addition, the output signal of the counting sensor 12 consisting of the iron pieces 5a to 5e and the non-contact switch 7 (when the rotary cylinder 1 rotates and each of the iron pieces 5a to 5e is located at a sensing position immediately in front of the non-contact switch 7) The output signal of the contact switch 7 (hereinafter this output signal will be referred to as counting pulse P) is also sent to the gate circuit 13.

That is, the counting pulse P passes through the gate circuit 13 when the vacuum switch 11 is on.

The counting pulse P that has passed through this gate circuit 13 is input to a counter 14 and counted.

Further, the count value of the counter 14 is sent to the display unit (as shown) and displayed.

By the way, in the conventional device described above, the holding device 2 holding the bundle of paper sheets 10 comes into contact with the suction shafts 4a to 4e, and the stopper (as shown) immediately before counting starts simultaneously with the forward rotation of the rotating cylinder 1.
Normally, the rotary cylinder 1 is separated from the rotary cylinder 1 and the rotary cylinder 1 is placed in a state of interaction with the force.

Therefore, as shown in FIG.
If the bundle of paper sheets 10 held between them is, for example, a used circulation ticket, unlike a new ticket, it may bulge due to bending, etc. In the example, the corner 4b' of the suction shaft 4b of the rotary cylinder 1 is connected to the suction shaft 4.
Push in the arrow direction Y opposite to the rotation direction X of b, and rotate the rotating cylinder 1.
is reversed in the direction of the arrow Z, and the counting iron piece 5a provided on the circumference of the cylinder 1 moves to a position where it can be detected by the non-contact switch 7 and stops. As shown in the operation waveform diagram, at the start of normal counting operation (
Time T.

), the output signal (2) of the switch 7 becomes a binary logic level 11" signal.

If the counter 14 has a function of performing a counting operation at the falling edge of the output signal (counting pulse) of the switch 7, the normal counting operation will not start until the rotary cylinder 1 starts rotating in the direction of arrow A from the above state. Figure, time T.

), when the iron piece 5a is disconnected from the non-contact switch 7 and the output signal ■ of the switch 7 falls from the "1" signal to the "O" signal (time T), the counter 14 operates and its contents are XX1", resulting in one extra sheet being counted and an erroneous counting situation occurring.

Further, the belt (as shown) wrapped around the rotating shaft of the motor and the shaft 6 of the rotating tube 1 may generate heat when the sheet counting machine is used for a long time.

While the use of the paper sheet counting machine was interrupted due to a motor failure, the belt cooled down, and a portion of the belt that came into contact with the rotating shaft of the motor and the shaft 6 of the rotating cylinder 1 became distorted. At the start of the operation, the rotary cylinder 1 may rotate backwards, causing the same erroneous counting condition as described above.

This invention prevents erroneous counting by providing a counting prohibition means so that even if the rotary cylinder rotates in reverse due to the above-mentioned reason, the pulse signal generated at that time will not be counted before the normal counting operation of the paper counting machine starts. It is characterized by what it did.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

The configuration of the paper sheet counter of this embodiment is the same as that of the conventional device shown in FIGS. 1 and 2, except for the delay circuit 15 and gate circuit 16 shown in FIG.

Therefore, the paper sheet counting machine of the present invention is similarly provided with the rotary cylinder 1, the holding device 2, and the counting pulse generating mechanism 3 shown in FIG.

Furthermore, the configurations of the vacuum switch 11, counting sensor 12, and counter 14 are also the same, and are given the same numbers in FIG.

The output signal (2) of the vacuum switch 11 is input directly to the gate circuit 16, and also is input to the gate circuit 16 via the delay circuit 15 as a delayed signal DV.

The output signal (count pulse P) of the counting sensor 12 is also input to the gate circuit 16 .

The gate circuit 16 is constituted by an AND gate.

Further, as the delay time of the delay circuit 15, a time t1 as shown in FIG. 3A is selected.

That is, in FIG. 3, time T.

is the time when the vacuum switch 11 is turned on at the start of normal counting operation, time T1 is the time when the counting pulse P falls after the start of normal counting operation because the non-contact switch 7 is turned on due to the reverse rotation of the rotary cylinder 1, and time T2 is The output signal ■ after the start of the counting operation of the vacuum switch 11 is the delay circuit 1.
The time T3, which is the time first output from 5 as the delay signal DV, is the time when the counting pulse P that is first output after the rotary cylinder 1 starts rotating without reverse rotation and the first output count pulse P falls. A time is selected between time T1 and time T3 at which the output signal DV of the delay circuit 15 begins to be output.

By selecting such a time t1, it is possible to correspond to the first sheet actually sucked after the start of the counting operation, regardless of whether the rotary tube 1 rotates backwards before the start of the normal counting operation. The counter 14 counts the counting pulses P only after they pass through the gate circuit 16. Therefore, the extra counting pulses P generated due to the reverse rotation of the rotary cylinder 1 are not counted.

Also, after the output of the counting pulse P for the last sheet, the vacuum switch 11 is turned off and the vacuum switch 11 is turned off.
When the output signal ■ becomes the 'XO' signal, the gate circuit 16 closes immediately, so even if a counting pulse P is generated for some reason after the vacuum switch 11 is turned off, this counting pulse P will not be input to the counter 14, resulting in erroneous counting. This is designed to prevent this from occurring.

Next, the operation of the above embodiment will be explained.

First, a case will be described in which the counting operation is normally started without the rotary cylinder 1 rotating in reverse due to the above-mentioned causes.

In this case, when the bundle of paper sheets 10 is set on the holding device 2, this set state is detected by a photoelectric detector (path shown), and the holding plate 8 is moved toward the presser member 9. As a result, the bundle of paper sheets 10 In the example of FIG. 1, the free end 10a of the suction shaft 4b is
When the vacuum switch 11 is brought into close contact with the suction port, the vacuum switch 11 is turned on, and the output signal ■ of the switch 11 is output at time T in FIG.

The signal becomes ``1''.

This signal (2) is input to a delay circuit 15 and a gate circuit 16.

Also, when the vacuum switch 11 is turned on (time T).

), the rotating cylinder 1 begins to rotate in the direction of arrow A, the force.

Time T. Delay circuit 1 at time T2 after time t1 has elapsed from
5, the signal DV (1" signal) begins to be output, and the gate circuit 16 is ready for operation.

When the counting pulse P for the first sheet is output, the counting pulse P passes through the gate circuit 16 and is counted by the counter 14, and the counted value is displayed on the display section.

Then, the counting pulse P for the last first paper sheet is output, and then when the vacuum switch 11 is turned off, the signal ■ becomes "O", so the gate circuit 16 is immediately closed and the subsequent input signal to the counter 14 is is prohibited, the counting operation of the counter 14 is completed, and therefore the count value of the counter 14 matches the number from the first sheet to the last sheet of the sheet bundle 10. .

Next, what happens when the rotary tube 1 rotates in the opposite direction in the direction of the arrow Z for the reasons listed above before the counting operation starts, for example, because an old and curly paper sheet bundle 10 is set in the holding device 2. Explain.

In this case, the counting pulse P is in the 51" signal state before the vacuum switch 11 is turned on, and is inverted to the 0" signal immediately after the start of the counting operation (time T1).

However, since the gate circuit 16 is closed until time t1 has elapsed after the start of the counting operation, input of this counting pulse P to the counter 14 is prohibited.

Therefore, the extra counting pulses P generated due to the reverse rotation of the rotary barrel 1 are not counted by the counter 14.

The operation after time t1 has elapsed is exactly the same as the normal operation described above.

Therefore, erroneous counting will not occur in this case as well.In the above embodiment, the counter has a function of performing a counting operation at the falling edge of the counting pulse, but of course, this function of the counter is It may be replaced with one that performs counting operations at times.

In this case, it is necessary to change the design of the delay circuit in accordance with the delay time.

As explained above, the present invention provides a paper sheet counter that prevents erroneous counting by providing a prohibition means that prohibits extra pulse signals generated by reverse rotation of a rotary tube from being input to the counter and counted. Since a device for preventing erroneous counting of a machine is provided, reliable counting can be carried out at all times, and since the above-mentioned inhibiting means is realized by an electronic circuit with an extremely simple configuration, it is extremely effective in practice.

[Brief explanation of drawings]

FIG. 1 is a plan view of the main parts of a paper sheet counter common to a conventional device and an embodiment of the present invention, FIG. 2 is a block diagram of the counting circuit of the conventional device, and FIG. 3 is a diagram of the conventional device and the present invention. FIG. 4 is a waveform diagram illustrating the operation of an embodiment of the present invention, and FIG. 4 is a configuration diagram of a counting circuit according to an embodiment of the present invention. 1...Rotating tube, 2...Holding device, 3.
...Counting pulse generation mechanism, 4a to 4e...
・Suction shaft, 10... Paper sheet bundle, 11...
・Vacuum switch, 140. . ... Counter, 15, 16 ... Prohibition means.

Claims (1)

[Claims] 1 The suction shaft attached to the rotary tube sucks up the paper sheets one by one and turns them over, and the counting pulse generation mechanism generates a number of pulse signals corresponding to the number of paper sheets suctioned by the suction shaft. In a paper industry counting machine which counts the number of paper sheets by inputting a pulse signal to a counter, the pulse signal generated by the counting pulse generation mechanism is counted when the rotary cylinder reverses rotation before counting starts. An erroneous counting prevention device for a paper industry counting machine, characterized in that a prohibition means is provided to prevent erroneous counting.