JPH0219878Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a shutter safety device in a paper sheet counting machine.

As a conventional example of a paper sheet counting machine that counts paper sheets such as banknotes, there is a paper sheet holder into which a bundle of paper sheets is loaded, and a paper sheet counter that is in contact with the bundle of paper sheets loaded in this holder. Some paper sheet counters are equipped with a counting mechanism that sucks up paper sheets one by one and counts them as they are turned over.This paper sheet counting machine has a paper sheet counter that is equipped with a counting mechanism that absorbs paper sheets one by one and counts them while turning them over. A shutter covering the holder and counting mechanism is provided so that it can be opened and closed.

By the way, this shutter starts the closing operation from the open state after a certain period of time has elapsed after detecting that paper sheets have been loaded into the holder. If the operator takes time to do so, or if he or she attempts to correctly reload paper sheets that have been loaded into the holder, there is a risk that the operator's hand may get caught in the shutter. Although this accident is not particularly dangerous to the human body, it causes unnecessary psychological fear to the operator, and the operator rushes to load paper sheets and the paper sheets are not loaded correctly into the holder. This may cause trouble in counting operation. Another problem is that when the shutter is held with one's hand, the motor that drives the shutter remains overloaded.

Therefore, the applicant filed Japanese Patent Application No. 54-48595 (Japanese Unexamined Patent Publication No.
55-140982), a plate made of conductive material is attached to the shutter (soundproof cover),
We proposed a technology that activates a control circuit by touching this plate with a part of the human body to stop the closing operation of the shutter (soundproof cover). According to this technology, each of the above problems can be solved by stopping the shutter when a hand touches the plate attached to the shutter, but if the plate comes off from the shutter or is damaged, The problem remained as to how to repair the plate.

This idea was proposed in consideration of the above-mentioned circumstances, and involves coating a part of the shutter of a paper sheet counting machine with conductive resin, and detecting when a part of the human body comes into contact with this conductive resin. By stopping the closing operation of the shutter and opening the shutter, the object is to prevent the operator's hand from being caught in the shutter for a long time, and to facilitate maintenance of the detection section.

This invention will be explained below based on embodiments shown in the drawings.

1 to 4 show a first embodiment of this invention.

In Figures 1 and 2, paper sheet counter 1
In a recess 3 formed on the upper front side of the body 2, a known counting mechanism 5 comprising a holder 4, a suction shaft (not shown), etc. is provided. Further, a pair of shutters 6A and 6B are provided to the counting mechanism 5 so as to be openable and closable in the direction of the arrow AB in the figure. The shutters 6A and 6B are controlled by a control circuit, which will be described later, to start closing operation towards the center position of the fuselage 2 at the same time as the counting operation of the counting mechanism 5 starts, thereby covering and sealing the counting mechanism 5. At the same time, when the counting operation is completed normally, an opening operation is started in both the left and right directions of the machine body 2, so that the counted paper sheet bundle 7 can be taken out by hand from the holder 4.
Note that the holder 4 is connected to a holder motor HM (Fig. 1,
(not shown in FIG. 2), and the shutters 6A and 6B are driven by a shutter motor SM.

Here, the drive mechanism 8 for the shutters 6A, 6B, which includes a shutter motor SM, etc., will be explained with reference to FIG. A plurality of pulleys 10 are attached to the inner surface of the lower end portion 9 of the shutters 6A, 6B. A chain (not shown) is wound around this pulley 10, and a sprocket 11 attached to a motor shaft of a shutter motor SM is meshed with this chain. Further, a sliding block 12 is fixed on the outer surface of the lower end portion 9. A guide plate 13 that guides this sliding block 12 is attached to the fuselage 2.
is installed at the corresponding position inside the Further, a mounting plate 15 is attached to the upper end portion 14 of the shutters 6A, 6B, and a roller 16 is attached to this mounting plate 15. This roller 16 is guided along a guide shaft 17 fixed to the body 2 and is rotatable. and,
With the drive mechanism 8 configured in this manner, the shutters 6A and 6B are operated by the shutter motor SM to open and close in opposite directions. Note that symbols 18A and 18B in the figure are permanent magnets. The permanent magnets 18A, 18A are connected to the shutter 6
One each is fixed on the inner surface of the lower end portion 9 of each shutter A, 6B and near each contact end surface 19A, 19B of the shutter 6A, 6B. In addition, permanent magnet 18B
are fixed one by one on the inner surface of each upper end portion 14 of the shutters 6A, 6B and near the contact end surfaces 19A, 19B. And shutters 6A, 6
When B is closed, the permanent magnets 18A and 18A, 18B and 18B of the shutters 6A and 6B are attracted to each other, whereby the contact end surfaces 19A and 19B are brought into close contact with each other to enhance the soundproofing effect. .

As shown in FIG. 4, conductive layers 20A and 20B are formed on the entire surfaces of the contact end surfaces 19A and 19B, respectively, by applying a conductive resin. Further, the contact end surfaces 19A, 19B include
The surface is roughened to have an uneven shape so that the conductive layers 20A and 20B can be reliably attached. and,
As shown in FIGS. 3 and 4, the conductive layers 20A and 20B are conductors 21A and 21 formed by applying conductive resin to the lower surfaces of the shutters 6A and 6B.
B, screws 22 on these conductors 21A and 21B,
They are connected to connection cords 25A and 25B, respectively, through terminal plates 24 connected by nuts 23, and the connection cord 25A is connected to a power source of a predetermined voltage to apply voltage to the conductive layer 20A, and the connection cord 25B grounds the conductive layer 20B. In this way, the touch switch TS is formed by both conductive layers 20A and 20B. This touch switch TS functions as an obstacle detection mechanism. For example, when a conductive obstacle such as an operator's hand is sandwiched between the shutters 6A and 6B which are in the closing operation, both conductive layers 20A and 20B are activated. It becomes “ON” state by being short-circuited. Then, by sending this "ON" signal to the control mechanism shown in FIG. 5 and processing it, the shutters 6A, 6
The closing operation of shutter B is stopped, and the shutter motor SM is also reversed to close the shutters 6A and 6.
B is starting to open. Note that the touch switch TS may be an alternating current type instead of a direct current type.

Returning to FIG. 1, on the front surface of the machine body 2 above the counting mechanism 5, there are a main switch 26, a digital switch 27 for presetting the number of sheets to be counted, a number display section 28, a mode selection switch 29, and a shutter switch 30, respectively. It is provided. Further, numeral 31 in the figure is a touch plate type reset switch. Shutter switch 30 is shutter 6
This is a switch for controlling the opening/closing operation of shutters A and 6B. When this shutter switch 30 is turned on, the control circuit (Fig. 5) becomes effective and the shutter 6 is turned on.
On the other hand, if the shutter switch 30 is turned off, the control circuit becomes invalid and the soundproof covers 6A and 6B cannot be opened or closed, and remain open at all times. It is something.

Although not shown, a shutter position sensor PS is provided inside the body 2 to detect when the shutters 6A, 6B are completely closed. The output signal of this shutter position sensor is sent to the control circuit shown in FIG.

Next, referring to FIG. 5, the circuit configuration of this embodiment including the control circuit for controlling the opening and closing operations of the shutters 6A and 6B will be described. Paper sheet bundle 7 is in holder 4
This state is detected by the start detection circuit 3 when the
2, and a start detection signal is output. The start detection circuit 32 is constructed of, for example, a photo sensor, but may also be constructed of a manual switch. The start detection signal is sent to the holder motor HM and the delay circuit 33. At this time, the holder motor HM begins to rotate in the normal direction, closes the holder 4, and moves the sheet bundle 7 to the counting position, while the delay circuit 33 A signal obtained by delaying the start detection signal by a predetermined time (delayed start detection signal) is outputted from the gate circuit 34, and is sent to the gate circuit 34 as a control signal. The gate circuit 34 receives a detection signal from a comparator circuit 35 whose input signals are the output signals of the cover position sensor PS and touch switch TS.

The comparison circuit 35 detects an ON signal when the output signal of the cover position sensor PS is an OFF signal and the output signal of the touch switch TS is an ON signal (that is, when the operator's hand or the like is caught between the shutters 6A and 6B). is outputted and sent to the gate circuit 34 and the shutter motor SM, thereby disabling the gate circuit 34 to prevent passage of the delayed start detection signal from the delay circuit 33, and reversing the shutter motor SM. Shutter 6
After the closing operations of A and 6B are stopped, the opening operations are started. On the other hand, when the respective output signals of the shutter position sensor PS and the touch switch TS are both off signals (that is, during the normal closing operation of the shutters 6A and 6B), an off signal detection signal is output from the comparator circuit 35 and sent to the gate circuit. 34 and the shutter motor SM, whereby the gate circuit 34 becomes operational and the delayed start detection signal is passed and sent to the shutter motor SM. Therefore, the shutter motor SM is rotated in the normal direction, and the shutters 6A and 6B are closed.

When the counting mechanism 5 starts counting and turns over paper sheets one by one, a correspondingly output counting signal is input to the counting circuit 36 and counted, and a signal indicating the content of this counting is sent to the comparing circuit 37. is input to input terminal A of. The output of the digital switch 27 (number of sheets setting signal) is connected to the other input terminal B of the comparison circuit 37.
Therefore, the comparison circuit 37 compares both input signals and outputs a match signal when the contents of both input signals match. This coincidence signal is sent to the shutter motor SM and the holder motor HM, and at this time, the shutter motor SM starts to rotate in reverse direction and opens the shutters 6A and 6B, and the holder motor HM also starts to rotate in the reverse direction and opens the holder 4. has been done. In addition, the output signal of the reset switch 31 is input to the shutter motor SM, holder motor HM, and counting circuit 36, so that when the reset switch 31 is turned on, for example, in the case of a count mismatch, the shutter motor SM starts reverse operation. Start shutter 6A,
6B is opened, the holder motor HM is also rotated in reverse to open the holder 4, and the counting circuit 36 is reset so that its contents are set to zero.

Next, the operation of the first embodiment will be explained. Before starting the counting operation, first, the digital switch 27 is operated to set the number of sheets, for example, "100". As a result, the number of sheets "100" is input to the input terminal B of the comparator circuit 37.
A signal indicating the number of sheets is input, and the number of sheets is preset to 100. Also, turn on the shutter switch 25. Next, when the bundle of paper sheets 7 is placed on the holder 4, this state is detected by, for example, a photo sensor, and a start detection signal (on signal) is output from the start detection circuit 32, and the holder motor HM and delay circuit Sent to 33rd. As a result, the holder motor HM begins to rotate normally, and the holder 4 closes to move the sheet bundle 7 to the counting position, allowing it to be turned over by the suction shaft. On the other hand, after the start detection signal is delayed for a predetermined time (for example, one second) by the delay circuit 33, it begins to be output as a delayed start detection signal (on signal) and is sent to the gate circuit 34. In this state, since the shutters 6A and 6B are not completely closed yet, the output signal of the shutter position sensor PS is an ON signal, and if the operator's hand or the like is not touching the touch switch TS, the output signal of the touch switch TS is is also an off signal.
Therefore, the detection signal from the comparator circuit 35 is an OFF signal. Therefore, at this time, the gate circuit 34 becomes operational and passes the delayed start detection signal and sends it to the shutter motor SM. begins to rotate in the normal direction after inputting the delayed start detection signal, and therefore the shutters 6A, 6
B starts the closing operation. If the touch switch TS is not turned on during this closing operation, the detection signal from the comparator circuit 35 will not turn on during this period, and therefore the shutters 6A and 6B will be closed normally. In addition, the counting signal output when paper sheets are turned up one by one is input to the counting circuit 36 and counted, and when the counting is finished, the counted content becomes "100".
Then, a match signal (ON signal) is output from the comparator circuit 37.
is output and sent to the holder motor HM and shutter motor SM. Therefore, the holder motor
Both HM and shutter motor SM begin to rotate in reverse, holder 4 is opened, and shutters 6A,
6B is released. For this reason, shutters 6A and 6B
When the paper sheet bundle 7 is completely opened, the operator removes the sheet bundle 7 from the holder 4 and starts counting the next sheet bundle. On the other hand, when the content of the count does not become "100", the comparison circuit 37 does not output a coincidence signal, and therefore, neither the holder motor HM nor the shutter motor SM rotates in reverse, and therefore the holder 4 is not opened. Further, the shutters 6A and 6B do not open and remain closed. At this time, by turning on the reset switch 31, the holder motor HM,
The shutter motor SM is reversed to open the holder 4, and the shutters 6A and 6B are opened to take out the paper bundle 7, and the counting circuit 36 is reset. Furthermore, during the closing operation of the shutters 6A, 6B, the operator's hands are
When it is caught by 6B and the touch switch TS is turned on,
The detection signal from the comparator circuit 35 becomes an on signal,
Therefore, the gate circuit 34 becomes inoperable and blocks the passage of the delayed start detection signal, and the detection signal is sent to the shutter motor SM, so that the shutter motor SM starts to rotate in reverse. Therefore, the shutters 6A and 6B stop their closing operation and then start their opening operation. When the operator removes his hand, the touch switch TS turns off.
Therefore, the detection signal from the comparison circuit 35 becomes an OFF signal, and the delayed start detection signal passes through the gate circuit 34 again and is sent to the shutter motor SM. As a result, the shutter motor SM begins to rotate normally, causing the shutters 6A and 6B to perform the closing operation again.

Next, FIG. 6 shows a second embodiment of this invention. The shutter 38 of this second embodiment is
It is composed of a plurality of shutter plates 38a, 38b, 38c connected to each other so as to be slidable in the opening/closing direction, and these shutter plates 38a, 38b, 3
8c are stacked one after another, and the paper sheet counter 1
It is designed to be stored in a case 39 provided on the top surface of the . Further, the side surface of the shutter plate 38c at the tip is closed by a vertical shutter plate 38d. Then, the shutter plate 38
The end surface of the shutter plate 38c and the inner surface of the vertical shutter plate 38d each have the same function as the contact end surface of the first embodiment. A conductive layer is formed to perform the same function as the touch switch TS of the first embodiment.

Therefore, in this second embodiment, when the operator's hand is caught between the shutter plate 38c and the vertical shutter plate 38d, the touch switch TS becomes "ON" and this "ON" signal is transmitted to the first
By sending the signal to the control circuit and processing it in the same manner as in the embodiment, the closing operation of the shutter 38 is stopped, and the shutter motor SM is further reversed to open the shutter 38.

In each of the above examples, the conductive resin applied to the shutter when forming the conductive layer includes various synthetic resins such as acrylic, epoxy, phenol, and rubber, silver copper, nickel, and carbon. (For example, Fujikura Kasei Co., Ltd.'s product name "Dotite") mixed with conductor powder is used, and from among various synthetic resins, one with good adhesiveness is selected depending on the material of the shutter. It is desirable to do so.

In addition, in each of the above embodiments, a touch switch is used in which the conductive layer is made conductive by placing the hand between two shutters. It is also possible to stop the closing operation of the shutter simply by touching one of the shutters.

○A method in which a pair of conductive layers are provided on each of the contact end surfaces of the shutter with a small distance from each other, and conduction is established between the conductive layers when one of the contact end surfaces is touched by a hand or the like.

○B A method in which the conductive layer is kept in a charged state and activated by discharge when it comes in contact with a hand, etc.

○C A method in which the human body acts as an antenna for commercial power supply noise when a hand or other object comes into contact with it, and the system is activated by this noise.

As is clear from the above explanation, this invention involves applying a conductive resin to a part of the shutter of the paper sheet counting machine to form a conductive layer, and detecting when a part of the human body comes into contact with this conductive layer. This system is characterized by detecting this and stopping the closing operation of the shutter, as well as opening the shutter. B. It is possible to prevent the shutter motor from being overloaded due to a hand being held in the shutter for a long time.

○B Because the conductive layer is in close contact with the contact end surface of the shutter, it is difficult to peel off.

○C If the conductive layer peels off or wears out, it can be easily repaired by applying a conductive resin.

It has excellent effects such as

[Brief explanation of the drawing]

Figures 1 to 5 show the first embodiment of this invention. Figure 1 is a perspective view showing the external appearance of the paper sheet counter, and Figure 2 is a view taken along the - line in Figure 1. A sectional view, Figure 3 is a perspective view of the shutter from below,
Fig. 4 is a sectional view of the shutter, Fig. 5 is a circuit diagram of the control circuit, and Fig. 6 is a perspective view showing the appearance of the main parts of the paper sheet counter, showing the second embodiment of this invention. be. 1... Paper sheet counter, 3... Recess, 4... Holder, 5... Counting mechanism, 6A, 6B... Shutter,
7... Paper sheet bundle, 8... Drive mechanism, 19A, 19
B... Contact end surface, 20A, 20B... Conductive layer, 3
5... Comparison circuit, 38... Shutter, SM... Shutter motor, PS... Shutter position sensor, TS
...Tatsuchi switch.

Claims (1)

[Scope of utility model registration request] A counting mechanism provided in a recess of the machine body, which counts the number of sheets by suctioning and turning over a bundle of paper sheets loaded in a holder one by one with a suction shaft, and a shutter that opens and closes the recess. , a touch switch that detects whether an obstacle exists between the contact end surfaces of the shutter, a shutter position sensor that detects the position of the shutter, a shutter motor that opens and closes the shutter, and a shutter motor that opens and closes the shutter; and a comparison circuit that controls whether the shutter is closed or stopped, and the comparison circuit receives a detection signal from the touch switch that indicates the presence of an obstacle, and receives a detection signal from the shutter position sensor that indicates that the shutter is closed. In a shutter safety device in a paper sheet counting machine configured to switch the operating direction of a shutter motor to move the shutter in an opening direction on the condition that a detection signal indicating that the shutter is in a position other than the shutter position is input, the touch switch A safety device for a shutter in a paper sheet counter, characterized in that a conductive resin coated on the contact end surface is used as an electrode, and a detection signal is output when an obstacle comes into contact with the electrode.