JPH0537331Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a paper sheet counting machine that automatically counts paper sheets, particularly when detecting obstacles near the shutter using a non-contact detection mechanism. The present invention relates to a shutter safety device in a paper sheet counting machine suitable for use in a paper sheet counting machine.

[Prior Art] Conventionally, a paper sheet counting machine includes a holder into which a bundle of paper sheets is loaded, and a system that attaches to the holder and picks up the paper sheets one by one and turns them over. A device equipped with a counting mechanism for counting is known.
The counting machine is provided with a shutter that can be opened and closed to cover the holder and the counting mechanism for the purpose of dustproofing the counting mechanism and preventing noise during the counting operation. ``Soundproofing device for paper sheet counter'' (Japanese Unexamined Patent Application Publication No. 140982/1982) has already been proposed as this type of paper sheet counting machine, but this proposal does not require any soundproofing device that would interfere with the closing operation of the cover. When an obstacle is near the cover, a touch switch detects this and controls the closing operation to be stopped or to be fully opened once. In addition, as a touch-switch-type paper sheet counting machine similar to the above, we have also published ``Shutter Safety Device for Paper Sheet Counting Machine'' (Utility Model Publication No. 1988-88371) and ``Shutter Safety Device for Paper Sheet Counting Machine''. ” (Jitsukai 58-
179560) has been proposed.

[Problems to be solved by the invention] By the way, the above-mentioned conventional paper sheet counting machine had the following problems.

(i) Although the obstacle detection mechanism using a touch switch has a simple structure, the cover stops closing or opens fully when touched by the operator's fingers, which may cause discomfort to the operator. It is easy to use, and tends to be surprising, especially to those who operate it for the first time.

(ii) Paper sheet counting machines have been proposed that detect obstacles by arranging non-contact sensors such as beam sensors in an array near the cover opening/closing end face instead of touch switches, but the structure becomes complicated. However, there are drawbacks such as a possibility that a gap may be formed in the detection area.

The present invention effectively solves the above-mentioned problems, and provides a shutter safety device for paper sheet counters that is capable of detecting obstacles near the shutter using a simple non-contact detection mechanism. This is the purpose.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a counting mechanism that counts the number of paper sheets that are turned over one by one by a suction shaft from a bundle of paper sheets loaded in a holder; A shutter is arranged to be openable and closable with respect to the counting mechanism, and a wide-angle detection area for non-contact detection of whether or not an obstacle exists near the shutter is set. a detection mechanism that outputs a detection signal when the counting mechanism starts the counting operation, closes the shutter when the counting operation of the counting mechanism ends, and opens the shutter when the counting operation of the counting mechanism ends; A control mechanism is provided for stopping the opening/closing operation of the shutter and for opening the shutter when a detection signal is output from the detection mechanism.

[Operation] In the present invention, when an obstacle such as a finger hits the detection area, a detection signal indicating the presence of the finger is output from the detection mechanism. Further, in this control mechanism, when a detection signal indicating an obstacle such as a finger is output from the detection mechanism during the closing operation of the shutter, the opening/closing operation of the shutter is stopped and the shutter is further released. Therefore, the shutter can be stopped and opened before a finger touches the shutter, compared to conventional safety devices that stop and release the shutter only after touching the shutter. Increased safety when closing the shutter.

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2 are an external view and a cross-sectional view, respectively, showing the configuration of a paper sheet counter according to this embodiment. In these figures, a recess 2 formed on the upper front side of the machine body 1 is equipped with a well-known device consisting of a holder 4 for loading a bundle of paper sheets 3, a rotary cylinder equipped with a suction shaft (not shown), etc. Counting mechanism 5, arrows X1-X2 in Figure 1
A pair of shutters 6, 6 that can be opened and closed in both directions is provided. A human body detection sensor section (not shown), which will be described later, is disposed at the base near the holder 4,
Infrared rays emitted from the human body are detected within the area indicated by the broken line in FIG. A contact sensor section (not shown), which will be described later, is provided on each contact end surface 6a, 6a of the shutters 6, 6 to detect an obstacle between the contact end surfaces.

Next, the configuration of each part of the paper sheet counter will be explained based on FIG. 3. A start operation unit 10 provided at the end of the holder 4 and operated when starting counting of paper sheet bundles 3 is a holder motor drive control unit 1 that drives and controls a holder motor (not shown) that opens and closes the holder 4.
1, outputs a start signal accompanying the operation.
The holder motor drive control section 11 controls the shutter 6,
A holder close signal is output to a shutter drive control section 12 that drives and controls a shutter motor (not shown) that opens and closes the shutter 6. For example, it is composed of a pyroelectric infrared sensor with a wide viewing angle, and changes the amount of infrared energy based on the temperature difference between the temperature of an object that enters the field of view and the surrounding temperature (the wavelength of infrared rays emitted from the human body is approximately 7 μm, The human body detection sensor unit 13 that detects the detected infrared rays (within the response wavelength range of the sensor) converts the detected infrared rays into voltage and outputs it to the shutter drive control unit 12 as a human body detection signal. For example, it is composed of a conductor,
A touch sensor section 14 that detects an obstacle between the contact end surfaces of the shutters 6, 6 is connected to the shutter drive control section 1.
Outputs the touch signal to 2. The shutter drive control section 12 sends a pump operation signal to a vacuum pump drive section 15 that drives and controls a vacuum pump (not shown), and a counting motor drive control section 16 that drives and controls a counting motor (not shown) that rotates the rotating cylinder. It outputs a shutter close signal and an obstacle detection signal to the obstacle alarm section 17, respectively. The vacuum switch 18 is turned on when the vacuum pressure inside the suction shaft rises to a predetermined value or more.
A signal is output to a counting motor drive control section 16 and a counting section 20 that counts the number of paper sheets turned up by the suction shaft, and an OFF signal is output when the vacuum pressure falls below a predetermined value. The signal is output to the drive control section 12 and the comparison section 19, respectively.
Rotating cylinder position sensor 21 that detects the position of the rotating cylinder
outputs a counting pulse signal accompanying the passage of the suction shaft to the counting section 20, and outputs a rotating cylinder position signal to the counting motor drive control section 16 at the time of initial operation of the counting motor. The comparison section 19 includes the vacuum switch 18
At the end of counting when outputs the OFF signal, the counter 2
Compare the counted number signal output from 0 and the reference number signal output from the reference number setting section 22 provided on the upper front of the machine body 1 for setting the number of counted sheets, and when they match, send the matching signal to the holder motor. When there is a mismatch, a mismatch signal is output to the drive control section 11 and a mismatch alarm section 23, respectively. The reset operation section 24 provided on the upper front surface of the machine body 1 includes a holder motor drive control section 11, a discrepancy alarm section 23, and a counting section 20.
and a reset signal associated with the operation.

Next, the logical configuration of the shutter drive control section 12 will be explained in detail with reference to FIG. Start operation section 10
The start signal output from the RS flip-flop 31 is supplied to a one-shot multivibrator (hereinafter referred to as one-shot multi) 30, and then supplied to a set input terminal S of an RS flip-flop 31 as a pulse signal with a constant time width. The Q output of RS flip-flop 31 is supplied to a first input of AND gate 32. A holder closed position signal output from a holder position detection switch (not shown) when the holder 4 is closed is sent to the second input terminal of the AND gate 32, the first input terminal of the AND gate 33, and the delay circuit 34, respectively. Supplied. From the delay circuit 34, a delayed holder closed position signal obtained by delaying the holder closed position signal by a predetermined time (for example, 0.5 sec) is supplied to the second input terminal of the AND gate 33. Human body detection sensor section 13
The human body detection signal output from the inverter 35
are supplied to a third input terminal of the AND gate 32 and a first input terminal of the OR gate 36 through the respective terminals. The touch signal output from the touch sensor section 14 is
The fourth of the AND gate 32 via the inverter 38
and a second input terminal of the OR gate 36, respectively. The output of the OR gate 36 is connected to the third input terminal of the AND gate 33 and the first input terminal of the AND gate 37.
and the input terminals, respectively. A shutter open position signal output from a shutter position sensor (not shown) when the shutters 6, 6 are in an open state is transmitted to an inverter 44.
and the second input terminal of AND gate 37 via RS
and a reset input terminal R of flip-flop 39, respectively. A shutter closed position signal output from the shutter position sensor when the shutters 6, 6 are in the closed state is transmitted to the fifth input terminal of the AND gate 32 via the inverter 40, and to the fourth input terminal of the AND gate 33.
The signal is supplied to the input terminal and the third input terminal of the AND gate 37, and is output as a shutter close signal. After being supplied to the one-shot multi 41, a pulse signal of a constant time width, that is, a pump operation signal, and a counting motor are output. Output as an initial activation signal. Count end signal, vacuum switch 1
After the OFF signal of 8 is supplied to the one-shot multi 42, it is sent as a pulse signal with a fixed time width to the RS.
A reset input terminal R of the flip-flop 31,
The signal is supplied to the set input terminal S of the RS flip-flop 39, and is also output as a pump motor stop signal and a counting motor stop signal. and gate 3
The output of 7 is connected to the first input terminal of the OR gate 43 and the RS
The Q output of the flip-flop 39 is the OR gate 43.
are respectively supplied to the second input terminals of the. The shutter close drive signal is output from the AND gate 32, and the OR gate 4
3, the shutter open drive signal is output from AND gate 3.
Obstacle detection signals are output from 3.

Next, the operation of this embodiment having the above configuration will be described.

First, before starting the counting operation, the reference sheet number setting section 22
The reference number of sheets (the number of sheets to be counted) is set in advance. Next, when the operator loads the bundle of paper sheets 3 into the holder 4 and operates the start operation unit 10 to remove the hand from the recess 2, a start signal (“1”) is output to the holder motor drive control unit 11. The holder 4 is closed by driving the holder motor. As a result, the bundle of paper sheets 3 is set at the counting position, and the suction shaft can perform the suction flipping operation. At this time, the holder 4 is closed, but the shutters 6, 6 are not closed, so the "1" signal is supplied to the first, second, and fifth input terminals of the AND gate 32, and therefore the human body detection signal and If the touch signal is "0", that is, if the operator's hand or the like is not near the holder 4 or the shutters 6, 6 (area indicated by the broken line in FIG. 2), or if the operator's hand is not in contact with the contact end surfaces of the shutters 6, 6, As a result, the output of the AND gate 32 becomes "1", and as a result, a shutter close drive signal is output from the shutter drive control section 12, and the shutters 6, 6 start the closing operation.

In this case, when the operator holds the stack of paper sheets 3 until the holder 4 closes, the human body detection sensor unit 13 detects the human body, so the human body detection signal (“1” is sent to the third input terminal of the AND gate 33 ”) is supplied (“1” signal is also supplied to the 4th input terminal),
When the holder 4 is closed (the first point of the AND gate 33)
Since the delay holder closed position signal (“1”) delayed by about 0.5 seconds from the “1” signal supplied to the input terminal is supplied to the second input terminal of the AND gate 33, if you quickly remove the signal from the AND gate 33 No obstacle detection signal is output, and the warning from the obstacle warning section 17 is suppressed.

On the other hand, if the operator's hand, etc. remains within the broken line area even after the delay time has elapsed during the closing operation of the shutters 6, 6, the human body detection signal (“1”) is output from the human body detection sensor unit 13. An obstacle detection signal (“1”) is output from the AND gate 33 to the obstacle alarm unit 17 to alert the operator, while a shutter close drive signal is not output from the AND gate 32 (“0”). At the same time, the shutter open position signal and shutter closed position signal become “0”.
Therefore, the output of the AND gate 37 becomes "1", and the shutter opening drive signal ("1") is output from the OR gate 43. As a result, the shutters 6, 6 stop the closing operation and then start the opening operation. Then, when the operator removes his hand from within the broken line area, the output of the OR gate 43 becomes "0" and the output of the AND gate 32 becomes "1", so that the shutters 6, 6 start the closing operation again. Furthermore, when the operator's hand or the like comes into contact with the contact end surfaces 6a of the shutters 6, 6, the same shutter opening/closing control as described above is performed.

Next, when the shutters 6, 6 are completely closed and a shutter closed position signal (“1”) is output from the shutter position sensor, the shutter drive control section 1
A pump operation signal is supplied from 2 to the vacuum pump drive unit 15 to start the vacuum pump, and at the same time, a counting motor initial operation signal is supplied from the control unit 12 to the counting motor drive control unit 16, and the rotating cylinder is brought to the initial position ( (counting position). Then, when the vacuum pressure inside the suction shaft that the paper sheet comes into contact with rises to a predetermined value or more, an ON signal is supplied from the vacuum switch 18 to the counting motor drive control section 16, and the rotary cylinder rotates from the initial position. and holder 4
Begins suction-flipping operation of the upper paper sheet. Each time a counting pulse signal is output from the rotary tube position sensor 21 in conjunction with the peeling operation, the counting unit 20
counts the number of paper sheets that have been turned over.

After that, when all the paper sheet bundles 3 on the holder 4 are turned over and counting is completed, the vacuum pressure inside the suction shaft decreases to a predetermined value or less, the vacuum switch 18 is turned OFF, and the OFF signal is A counting end signal (“1”) is supplied to the shutter drive control section 12. This causes the RS flip-flop 39
As a result, the Q output becomes "1", a shutter open drive signal ("1") is output from the OR gate 43, the shutters 6, 6 in the closed state are opened, and the vacuum pump and counting motor are stopped. . When the number of sheets counted by the counting section 20 matches the reference number of sheets set by the reference number setting section 22, a matching signal is output from the comparison section 19 to the holder motor drive control section 11, and as a result, the holder 4 is opened. Then, the counting operation is completed. On the other hand, if the counted number of sheets does not match the reference number of sheets, the mismatch alarm section 23 issues a warning to the operator. Thereafter, the operator takes out the bundle of paper sheets 3 from the holder 4 and starts counting the next bundle of paper sheets.

However, according to the above embodiment, since one pyroelectric infrared sensor having a wide-angle detection area is used as the human body detection sensor section 13, non-contact detection is performed, so that the operator does not feel uncomfortable. Further, it is possible to simplify the structure and realize stable detection operation.

[Effects of the invention] As explained in detail above, the present invention has the following features: (i) If a finger is present within the detection area during the closing operation of the shutter, the opening/closing operation of the shutter is stopped, and the shutter is further closed. Since the shutter is opened, the shutter can be stopped and opened before a finger touches the shutter, which eliminates the conventional safety device that stops and opens the shutter only when the shutter is touched. Compared to the previous version, the safety when closing the shutter is increased, and the system does not cause discomfort or surprise to the operator.
It becomes possible to automatically stop and open the shutter.

(ii) Compared to conventional beam-shaped sensors, it is possible to eliminate the possibility of gaps occurring in the detection area, and the structure of the detection mechanism can be simplified. Thereby, stable detection operation can be performed, and cost reduction can be achieved by reducing the number of parts.

[Brief explanation of drawings]

Fig. 1 is an external view showing the configuration of a paper sheet counter according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a paper sheet counter according to the present embodiment. FIG. 4 is a block diagram illustrating the configuration of the analog counter, and FIG. 4 is a diagram illustrating the logical configuration of the shutter drive control section according to this embodiment. 3... Paper sheet bundle, 4... Holder, 5... Counting mechanism, 6... Shutter, 12... Shutter drive control section (control mechanism), 13... Human body detection sensor section (detection mechanism).

Claims (1)

[Scope of Claim for Utility Model Registration] A counting mechanism for counting the number of paper sheets by turning over a bundle of paper sheets loaded in a holder one by one using a suction shaft, and a counting mechanism arranged to be openable and closable with respect to the counting mechanism. a shutter; a detection mechanism that sets a wide-angle detection area for non-contact detection of whether or not an obstacle exists near the shutter and outputs a detection signal when an obstacle exists in the detection area; The shutter is closed when the counting operation of the counting mechanism starts, and the shutter is opened when the counting operation of the counting mechanism ends, and when a detection signal is output from the detection mechanism during the closing operation of the shutter. A shutter safety device for a paper sheet counting machine, comprising: a control mechanism for stopping the opening/closing operation of the shutter and for opening the shutter.