JPS5828627B2 - 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, particularly 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 rotating cylinder 1 is driven by a motor (as shown) and rotates about a shaft 6 in the direction of 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 4a.
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 (as shown), and the holding plate 8 is moved to the presser member 9 side by this detection signal. A bundle of paper sheets 10 is held between a holding plate 8 and a pressing member 9.

At this time, the free end 10a of the paper sheet bundle 10 comes into close contact with the suction port (as shown) of the suction shaft 4b in the illustrated example, and as a result, the pressure of the vacuum pump (as 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 I (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.
Usually, the rotary cylinder 1 is separated from the rotating cylinder 1 and the rotating cylinder 1 is placed in a free state.

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 sleeve 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 T2) Output signal of switch γ at previous time T1■
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) P 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. 3, time T2), the iron piece 5a comes off the non-contact switch 7, and this switch 7
When the output signal ■ falls from the 11" signal to the 10" signal (
At time T3), the counter 14 operates and its content becomes 1.
As a result, one extra sheet of paper is counted, resulting in an erroneous counting situation.

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 stores a pulse signal (counting pulse) generated at that time in a memory circuit even if the rotary cylinder rotates in reverse due to the above-mentioned reason before the normal counting operation of the paper sheet counter starts, and The present invention is characterized in that a control circuit is provided which starts normal counting operation by canceling the memorized state after the cylinder starts to rotate normally, thereby preventing erroneous counting.

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

The configuration of the sheet counting machine of this embodiment is the same as the configuration of the conventional device shown in FIGS. 1 and 2, except for the control circuit 20 shown in the counting circuit of FIG. 4.

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 1L counting sensor 12 and the counter 14 are the same, and the same numbers are given in FIG. 4.

The output signal ■ of the vacuum switch 11 is input to the first input terminal of the AND gate 16 via the inverter 15 in the control circuit 20, and is also directly input to the first input terminals of the AND gates 18 and 19. .

The output signal (count pulse) P of the counting sensor 12 is input to each second input terminal of the AND gates 16, 18, 19.

The output signal of the AND gate 16 is input to the reset input terminal Q of the flip-flop 17.

Also, the output signal of the AND gate 18 is the flip-flop 1
It is input to the set input terminal Q of No. 7.

The set output signal P' of this flip-flop 17 is a signal synchronized with the counting pulse P outputted during the normal counting operation of the counting pulse generating mechanism 3, and this signal P' is counted by the counter 14, and the counted value is is displayed on the display section.

It is assumed that the flip-flop 17 has a function of being driven at the rising edge of the counting pulse P.

It is also assumed that the counter 14 performs a counting operation at the falling edge of the counting pulse P, like the counter of the conventional device.

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

First, if the rotating cylinder 1 starts counting normally without rotating backwards due to the causes mentioned above,
This will be explained with reference to FIGS. 3A, B, and D.

When the bundle of paper sheets 10 is set on the holding device 2, this set state is detected by a photoelectric detector (as shown), and the holding plate 8 is moved toward the pressing member 9 side.

As a result, when the free end 10a of the bundle of paper sheets 10 comes into close contact with the suction port (not shown) of the suction shaft 5b in the example of FIG. The output signal ■ is sent to the ant gate 16 and the inverter 1
In addition to being input via 5, Antogame h18, 19
is also entered.

As a result. Even when the counting pulse P is input to the AND gate 16, its output signal remains at 10'' while the signal 2 is at the binary logic level of 11''.

Further, the AND gate 18 is deregulated by the signal ``2'' and is in an operable state.

Next, at time T4, when the first counting pulse P for the first paper sheet is input to the ant gates 18 and 19, the outputs of the ant gates 1 and 18 become 11",
As a result, the set output signal of flip-flop 17 is 11
“becomes.

This set output signal remains "1" until the output signal ■ of the vacuum switch 11 is inverted to a 10" signal after the counting operation is completed.
The signal is retained.

And gate 19, which was deregulated at time T4.
A pulse signal P synchronized with the first counting pulse P from
' starts to be output, so the counter 14 executes a counting operation at the falling edge of this pulse signal P' and its contents become 1.
becomes.

From now on, the AND gate 19 is deregulated while the output signal ■ of the vacuum switch 11 is 11" signal period, so the second and subsequent counting pulses P output for the second and subsequent sheets are It is input to the counter 14 as a pulse signal P' and counted.

Then, after the counting pulse for the last sheet of paper is output and this counting pulse P is counted by the counter 14, when the signal ■ is inverted to the "O" signal, the AND gate 18
, 19 are closed and their output signals both become "0".

At this time, the count value of the counter 14 is equal to the number of sheets in the paper bundle.

Next, we will explain the operation when, for example, an old and curly paper bundle 10 is set in the holding device 2, and the rotary cylinder 1 rotates in the opposite direction in the direction of the arrow Z for the reason described above before the start of the counting operation. Figure 3A.

This will be explained with reference to C and D.

In this case, the counting sensor output (counting pulse P) becomes the 11'' signal at time T1 before the vacuum switch 11 is turned on.

At this point (time T1), the output signal of the vacuum switch 11 is 10", so the output of the inverter 15 is 1".
1", and the restriction on Antgame-116 has been lifted.

Therefore, at time T1, the output of Antoge'-N6 becomes 1
”, and therefore a 1” signal is input to the reset input terminal S of the flip-flop 17.

Also, at this time, since the output of the AND gate 18 is 90'', a 10'' signal is input to the set input terminal S of the flip-flop 17.

As a result, the flip-flop 17 is put into a reset state,
The set output signal becomes "O", and the AND gate 1
9 remains regulated and closed.

Next, when the rotary cylinder 1 starts to rotate forward and the vacuum switch 11 is turned on at time T2 and its output signal becomes "1", the output of the inverter 15 becomes "O", and therefore the output of the ant gate 16 becomes "O". XXO", and the input signal at the reset input terminal S of the flip-flop 17 becomes "O".

However, at this time, the output of the ant gate 18 is also 0, and therefore the input signal at the set input terminal S of the flip-flop 17 is also 0, so the flip-flop 17 remains in the reset state, and its set The output signal is "O", so the AND gate 19 remains closed.

At time T3, the counting pulse P becomes an "O" signal, but the flip-flop 17 still remains in the reset state and therefore the AND gate 19 remains closed.

Therefore, the extra count pulse P generated between times T1 and T3 due to the reverse rotation of the rotary barrel 1 is not input to the counter 14, and therefore the count value of the counter 14 remains O and does not change.

Next, at time T5, the counting pulse P for the first sheet
When the output starts, the output of the ant gate 18 becomes "1" and the output of the ant gate 16 becomes "10".

Therefore, the flip-flop 17 is inverted to the set state and its set output signal becomes 11'', and as a result, the AND gate 19 is deregulated and the pulse signal P' is output.

This pulse signal P' is counted by a counter 14.

The subsequent operations are the same as in the normal operation described above.

In this way, even if the rotary cylinder 1 rotates in the reverse direction before the normal counting operation starts, the control circuit 20 prevents erroneous counting from occurring.

In the above embodiment, the counter has the function of performing a counting operation at the falling edge of the counting pulse, but it may also have a function of performing the counting operation at the rising edge of the counting pulse, and in this case, the control circuit The configuration needs to be redesigned accordingly.

As explained above, the present invention stores the generation state of the extra pulse signal that occurs when the rotary cylinder rotates in reverse, and cancels the memorized state after the rotary cylinder starts rotating normally, thereby achieving normal counting operation. Since we have provided an erroneous counting prevention device for a paper sheet counting machine that is equipped with a control circuit that starts the process to prevent erroneous counting, reliable counting can be performed at all times.

Furthermore, the control circuit described above can be realized by an electronic circuit having an extremely simple configuration, and is therefore 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, 14... Counter, 2
0...Control circuit.

Claims (1)

[Claims] 1. A suction shaft attached to a rotary tube sucks up paper sheets one by one and turns them over, and a 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 sheet counting machine that inputs this pulse signal into a counter to count the number of paper sheets, the generation state of the pulse signal generated by the counting mechanism when the rotating cylinder reverses rotation before starting counting is determined. A paper sheet counting machine characterized by comprising a control circuit that stores information and causes the counting mechanism to start a normal counting operation by canceling the memorized state after normal rotation of the rotary tube starts. Miscount prevention device.