JPH0239829B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an abnormal coin holding device in a coin sorting and counting machine. In addition to coins of the denomination to be sorted, a coin sorting and counting machine may contain deformed coins, counterfeit coins, or coins from other countries, and these abnormal coins must be reliably removed. Conventional tilt-type coin sorting and counting machines detect abnormal coins by optically determining the diameter and determining the material using a magnetic sensor before the coins are moved to the sorting section. Sometimes there is a method of switching the passage and removing it to a redirect box. However, each time an abnormal coin is detected, the redirect box must be pulled out to confirm the abnormal coin, and a mechanism for switching the passage is also required, which has the disadvantage that coins may get stuck at the switching mechanism. It was hot. Furthermore, when using a solenoid to project a stop piece into the passageway, it is very difficult to determine the timing to stop the abnormal coin with the stop piece, and in some cases, the coin may get caught in the passage wall when the stop piece protrudes. There was this inconvenience. Therefore, an object of the present invention is to provide an abnormal coin holding device that can reliably stop an abnormal coin on a path when an abnormal coin is detected. This invention will be explained below. FIG. 1 shows an example in which the present invention is applied as a coin sorting device for sorting and classifying coins of multiple denominations. Located slightly backwards,
On the back side of the passage surface 1a, there is a back wall part 2 having a height of approximately half the outer diameter of the coin C. The front part remains open, and the upper edge 1b is cut to make it easier for the coin C to fall. It's been dropped. And coin aisle 1
On the front side, there are chute 3A, 3B, 3C, 3 that guides coins C by denomination sorted by size downward.
Coin stop scraping rollers 6A, 6B, 6C and 6D are arranged to be rotated by motor M2 in the direction of the arrow in FIG. 2, respectively. The coin stop scraping rollers 6A to 6D are tapered rollers whose outer diameter on the upstream side of the coin passage 1 is smaller than the outer diameter on the downstream side, and the taper, that is, the radius of the small diameter side and the large diameter side. The difference R is the error range of the outer diameter of the coins C to be sorted by the roller, and at least on the large diameter side, the distance between the coin passage 1 and the passage surface 1a is smaller than the outer diameter of the coin C. It is located in Furthermore, as shown in FIG. 2, it is effective to provide the axis of the shaft 5 on the extension of the passage surface 1a side of the back wall portion 2 in order to repel the upper end of the coin C forward. It is desirable that at least the peripheral surface of the housing 6 is made of an elastic material such as rubber. moreover,
A coin feeding device 7 is provided on the upstream side of the coin passage 1 to sequentially feed mixed coins onto the coin passage 1. This coin feeding device 7 has a rotating plate 8 that is rotated by a motor M1 in the direction of the arrow in a slightly backward-inclined posture. The notches 9, 9, . . . scoop up mixed coins from a hopper 10 storing the mixed coins and send them to the passage 1. On the other hand, a cover 11 that can be opened and closed is provided above the coin stopping scraping rollers 6A to 6D, and this cover 11 is opened and closed by a handle 12, and its open/closed state is detected by a limit switch 13. ing. Further, the coin passage 1 from the coin feeding device 7 to the coin stopping and scraping roller 6A, and the back wall portion 2 are provided with a coin collecting mechanism 20 for collecting coins into the hopper 10 at a predetermined time, and a coin collecting mechanism 20 for collecting coins into the hopper 10 at a predetermined time. A coin detection unit 30 for detecting the denomination, authenticity, etc. of the coin C to be used, and a coin holding mechanism 40 for holding the coin by sandwiching it between the back wall 2 and stopping rolling at a predetermined time. It is arranged. The coin collection mechanism 20, coin detection section 30, and coin holding mechanism 40 will be described later. Here, the manner of feeding coins will be explained. When mixed coins are put into the hopper 10 of the coin feeding device 7 and the coin stopping and scraping rollers 6A to 6D are rotated in the direction of the arrow, the coins C in the hopper 10 enter the notches 9, 9, etc. of the rotary plate 8. It is scooped up and sent onto the coin passage 1. The delivered coin C is transferred on the passage surface 1a of the coin passage 1, passes through the coin collecting section 20, the coin detecting section 30, and the coin holding section 40, and is then transferred to one of the chute 3A to 3D corresponding to the coin C. When the coin C reaches just above the chute, the upper end of the coin C hits the approximate midpoint between the small diameter side and the large diameter side of the circumferential surface of the coin stopping scraping rollers 6A to 6D provided corresponding to the chute, and the coin C is stopped. At the same time, the upper end of the coin C is kicked forward by the rotation of the roller.
As a result, the coin C is tilted forward with the lower end of the passage surface 1a acting as a fulcrum, so that the coin C comes off the front edge 1b of the passage surface 1a and falls into the chute 3. On the other hand, FIG. 3 is a diagram showing a schematic structure of the coin collecting mechanism 20, the coin detecting section 30, and the coin holding mechanism 40. The coin collecting mechanism 20 has a rectangular collecting window 21 opened in the back wall part 2. A collection piece 22 is provided which rotates about a shaft 23 so as to protrude from the collection window 21 during operation. The collection piece 22 is connected to a solenoid 24 via a plunger 25, and when the solenoid 24 is operated, the collection piece 22 is moved to the back wall portion 22 as shown by the broken line in normal operation.
When collecting coins C, they protrude from the collection window 21 of the back wall 2.
Coins C that roll due to collision with the side surface of the collection piece 22 are collected into the hopper 10. Further, the coin detection section 30 has an image sensor 31 having a structure as described later on the upper surface of the back wall section 2, and has a light source 32 such as a lamp on the rear surface of the back wall section 2 facing the image sensor 31. The light from the light source 32 reaches the image sensor 31 through a transmission hole 33 provided in the back wall portion 2. Further, near the transmission hole 33, a material sensor 34 for detecting the material of the rolling coin C is arranged on the rear surface of the back wall part 2, and near the light source 32 there is a cleaning sensor 34, which will be described later. A mechanism 50 is provided. Here, an embodiment using a one-dimensional image sensor as the photoelectric conversion means of the coin detection section 30 will be described with reference to the drawings. As shown in FIGS. 4 and 5, a coin C is tilted in the coin passage 1. It is released by the rotary plate 8 and rolled in the direction of arrow A. The back wall 2 has rectangular transparent holes 33A and 33B.
A light source 32 that emits parallel light PL is provided below the holes 33A and 33B. Further, above the holes 33A and 33B, a light source 3 is provided.
A pair of image sensors 31A, 31B receive the light coming out from the holes 33A, 33B through the holes 33A, 33B.
is provided. Image sensor 31A, 31
B are attached to the base plate 35, and are arranged so as to extend from the passage surface 1a toward the center of the back wall portion 2 in a direction perpendicular to the coin conveyance direction A, and to be aligned with each other. Note that the substrate 35 is attached to a retaining wall 36.
A, 36B, and the image sensor 3
1A and 31B are provided so as to avoid positions facing the center of the coin. This prevents light passing through the hole in the coin from being received by the image sensors 31A and 31B when a coin with a hole in the center passes, such as a 5 yen coin or a 50 yen coin. It's for a reason. Therefore, each of the image sensors 31A and 31B is a photodiode array (hereinafter referred to as PDA) in which, for example, 512 photodiodes are arranged in a linear manner.
Electrical signal according to the amount of light received by each photodiode,
That is, when the light is shielded, a signal of the "L" level, for example, and when the light is not shielded, a signal of the "H" level, for example, is outputted serially in the scanning order. Note that in this embodiment, the image sensors 31A, 3
Scanning is performed in the order from each end near the center of 1B toward the outer end. Further, the ends of the image sensors 31A and 31B are embedded within both ends of the back wall portion 2 so that at least eight photodiodes are illuminated by light when coins are conveyed. On the other hand, with respect to the flow direction of the coins C, a well-known material sensor 34 is arranged slightly upstream of the image sensors 31A and 31B, and this material sensor 34 is arranged, for example, in the direction of the passing coin. It has a primary coil and a secondary coil, and outputs a voltage signal that varies depending on the material (magnetic properties) of the passing coin and the area of the coin facing the primary coil and secondary coil. In other words, even if the coins are made of the same material, the area surrounded by the broken line 34 in FIG. 4 is completely occupied by the coin;
The output voltage value is different when the area is only partially occupied, and the area indicated by the dashed line 34 is entirely or partially occupied depending on the hole part of the coin such as a 5 yen coin or a 50 yen coin. The output voltage value also differs when the For this reason, the image sensor 31A,
The material of the coin is determined at the same time as the diameter of the coin is determined by 31B. This will be explained in detail later. Next, the cleaning mechanism 50 will be described. As shown in FIG. 6, it has an operating member 51 bent into an inverted L shape, and the lower surface of the horizontal piece is made of soft material such as sponge, cloth, or wool. A cleaning material 52 is attached, and the operating member 51 is illustrated with a shaft 53 disposed below the vertical piece as a fulcrum.
It is designed to rotate in the D1 and D2 directions. Further, an elongated engagement hole 51A is provided in the middle of the vertical piece, and a drive disk 55 on which a drive pin 56 that engages with this engagement hole 51A is disposed is connected to the motor M3.
It is adapted to be rotated via a drive shaft 57. When the drive disk 55 rotates in the direction shown in the figure, the actuating member 51 reciprocates in the directions D1 and D2 as shown in the figure due to the engagement with the drive pin 56 and the engagement hole 51A. In addition, at the lower part of the operating member 51, there is an engaging piece 51B bent in an L-shape.
A limit switch 54 is disposed so as to engage with this engagement piece 51B, and counts the number of reciprocating movements of the actuating member 51, that is, the number of cleanings. Furthermore, the coin holding mechanism 40 in this invention
has a pressing piece 41 for holding and pressing the front and back surfaces of the rolling coin C between the holding part 41A and the back wall part 2, and this pressing piece 41 is connected to the actuating piece via a shaft 42. 43, and the actuating piece 43 is adapted to be rotated about a shaft 44 as a fulcrum. Further, one end of the actuating piece 43 is connected to a plunger 46 of a push type solenoid 45, and the other end and the pressing piece 43 are connected to a plunger 46 of a push type solenoid 45.
1 by a spring 47.
This coin holding mechanism 40 is operated by a solenoid 45.
is not driven, the plunger 46 retracts as shown by the broken line and the actuating piece 43 rotates about the shaft 44, causing the actuating piece 43 and the shaft 42 to rotate.
By pushing up the pressing piece 41 coupled with the above, a gap is formed between the back wall part 2 and the holding part 41A, and the coin C is designed to roll in the gap. Further, when the solenoid 45 is driven, the holding part 41A is moved toward the back wall part 2, so that the coin C between the holding part 41A and the back wall part 2 is pressed and held. It's summery. On the other hand, FIG. 7 is a block diagram showing the control system of this invention, in which the CPU (Central
Processing Unit or Micro-Processor
Unit), ROM (Read Unit) that stores programs, etc.
Only Memory) 101 and RAM (Random
Access Memory) 102, and motors M1 to
M3 is adapted to be driven via a motor drive section 103. In addition, solenoids 24 and 45
is driven via a solenoid drive unit 104, and has an amount data display unit 105 for displaying the counted amount, etc., an alarm device 106 that issues an alarm when an abnormality or accident occurs, and includes a material sensor 34 and an image sensor. The signal from the light source 31 is processed by a discrimination processing section 200 shown in FIG. Furthermore, start switch 111,
Clear switch 112, stop switch 113
and switch group 1 of limit switches 13 and 54
10, each of which has a bus line 1
20 are interconnected. By the way, FIG. 8 is a block diagram showing the discrimination processing section 200. The basic clock generation circuit 201 outputs the basic clock signal CP, and the timing pulse generation circuit 202 outputs the basic clock signal CP to the image sensors 31A and 31B. Outputs four-phase clock signals φ1, φ2, φA, φB and start pulse SP. Furthermore, based on the basic clock signal CP, the CPU 100 writes data to or reads data from the RAM 102 and performs various arithmetic processing based on input signals from each input/output port, which will be described later, according to a program stored in the ROM 101. , various signals are output from the output port. Here, image sensor sections 31A, 31
B inputs the clock signals φ1, φ2, φA, φB and the start pulse SP from the timing pulse generation circuit 202 to detect the light reception of the photodiode, and the process will be explained with reference to the configuration diagram in FIG. do. The image sensor 31 used here is a self-scanning image sensor, and the shift register 31 serves as one scanning circuit driven by a start pulse SP and clock pulses φ1 and φ2.
1, a shift switch 312 that temporally shifts the scanning pulses generated at each stage of the shift register 311 using clock pulses φA and φB;
A capacitor 313 consisting of a MOS transistor for noise compensation, an address switch 314 and
It consists of a PDA315. Therefore, the operation is started by applying a start pulse to the shift register 311.
Each photodiode is automatically scanned by applying SP, and after converting the optical input into an electrical signal for each photodiode, it is extracted as a continuous pulse train to the video line VS and input to the differential amplifier 316. This differential amplifier 316 is for removing noise components from the pulse signal flowing through the video line VS and obtaining an appropriate signal level.The output of this differential amplifier 316 is the video signal VDS (or VDS').
These video signals VDS and VDS' are transmitted to the next stage light-shielded portion length measuring circuits 210A and 210B, respectively.
is input. However, these light-shielded portion length measurement circuits 210
A and 210B receive the video signals VDS and VDS' from the image sensors 31A and 31B and output a signal corresponding to the length of the portion of the image sensor 31A and 31B that is shielded from light by the coin, and has a circuit configuration. To explain specifically about the shaded portion length measuring circuit 210A, the counting circuit 212A counts the basic clock signal CP from the basic clock generating circuit 201. Further, the counting circuit 211A counts the "H" level video signal VDS from the image sensor 31A, and when the counted value reaches a predetermined value (for example, "8"), it generates a coincidence signal CUS indicating this, and the subsequent image The video signal VDS from the sensor 31A is not input, and the coincidence signal CUS is applied as a control input to the LD terminal of the latch circuit 213A via the OR circuit 214A. When the latch circuit 213A receives the coincidence signal CUS, the latch circuit 213A outputs the count value CUD of the counting circuit 212A at that time.
The output MCD of the latch circuit 213A is the output of the light-shielded portion length measuring circuit 210A, and the output signal MCD is a value obtained by adding, for example, "8" to the number of photodiodes in the light-shielded portion. ing. In principle, it is possible to recognize that the light-shielding part has ended when the first "H" level signal appears in each scan, but considering noise etc., the "H" level signal is Only when the output is input a predetermined number of times (eight times in this example) is it recognized that the light-shielding portion has ended.
Therefore, when one scan is completed, the counting circuit 211
A and 212A are reset by a reset signal RST from output port 203. Note that the shaded portion length measuring circuit 210B is also configured in the same manner as the circuit 210A. However, the image sensor 31
Since it does not pass directly between A and 31B, the circuit 210
The output MCD' of B is not exactly the same as the output MCD of circuit 210A. However, if the diameter of the coin is the same, the sum of the outputs of the measurement circuits 210A and 210B when the coin passes below the image sensors 31A and 31B changes according to the same pattern, and the maximum value thereof is also the same. . In addition, input ports 204, 20
5 inputs the outputs from the shaded portion length measuring circuits 210A and 210B, that is, the latch outputs MCD and MCD' from the latch circuits 213A and 213B, respectively;
It is designed to be sent to RAM102, etc. On the other hand, the material detection circuit 206 inputs the output signal MTS from the material sensor 34, amplifies it appropriately, performs half-wave rectification, integrates the half-wave signal, and generates a predetermined reference voltage for each denomination. Compares with level and outputs material signal MSD. In addition, this material signal
The MSD is output as a 4-bit signal, for example, as shown in Table 1 below.

[Table] Also, material sensor 34 and material detection circuit 206
can be constructed using known technology, and the material signal
The 4-bit configuration of the MSD is also not limited to this. And the material signal MSD is input port 2
The data is input to the RAM 102 and the like via 07. Then, the output port 208 outputs the denomination signal m1 (1
yen coin), m2 (50 yen coin), m3 (5 yen coin),
m4 (100 yen coin), m5 (10 yen coin), m6 (500 yen coin)
In addition to outputting yen coins) and m7 and m8 (counterfeit coins), it also outputs an abnormality signal AL and a foreign object detection signal FMS, and these input ports 204,
205, 207, output ports 203, 208,
The CPU 100, ROM 101, and RAM 102 each have an address bus AB, a data bus DB, and
Connected by control bus CB. Furthermore, foreign object detection circuits 220A and 220B are provided to detect foreign objects such as dirt and dust adhering to the image sensor 31 and the light source 32, and when a foreign object check signal FCS is output from the output port 203, foreign object detection circuits 220A and 220B are provided. People are starting to do this.
Since the foreign object detection circuits 220A and 220B have the same configuration, the foreign object detection circuit 220A and 220B are used here.
To explain A, the video signal VDS from the image sensor 31A is transmitted through a one-shot multivibrator (hereinafter referred to as one-shot multi) 2.
21, this one shot multi 221
The output MS is the clear terminal CLR of the counter 222.
It is now entered into . Further, the count output CV of the counter 222 is input to the AND circuit 223, and the foreign object check signal from the output port 203 is inputted to the AND circuit 223.
The FCS is input to the AND circuit 223 and also to the clear terminal CLR of the one-shot multi 221. The counter 222 counts the clock pulses CP from the basic clock generation circuit 201, and the output of the AND circuit 223 is It is designed to be input to an OR circuit 214A in the shaded portion length measuring circuit 210A. Foreign object detection circuit 220
The same is true for B. Next, the operation of the present invention will be explained. First, the principle of denomination discrimination and foreign object detection using an image sensor will be explained. By the way, in a MOS image sensor, photodiodes are arranged in a straight line, for example, in units of 28 [μm], and by irradiating the image sensor with a parallel beam of light and blocking the light with a slit, the light hits the image sensor. There will be some parts and parts that are not exposed to light. An image sensor temporally converts this one-dimensional positional information from light into an electrical signal.
One bit of this electrical signal corresponds to a length of 28 [μm]. The principle of measuring the diameter of a coin using such an image sensor will be explained with reference to FIGS. 4 and 5. In order to reduce the influence of dust and dirt, the image sensors 31A and 31B are provided with light receiving windows 37A and 3 at the top of the coin passage section (back wall section 2).
7B is placed facing down, and parallel light PL from the light source 32 is irradiated from below. Then, the coin C is inserted into the transmission holes 33A, 33 of the image sensors 31A, 31B.
By passing through B, the parallel light PL is blocked.
By determining the number of bits n1 and n2 of the video signal VDS in the portion where this light is blocked, the length l where the light is blocked is determined as l=a+28[μm]×(n1+n2)...(1) be able to. Then, the length l when n1+n2=maximum value MAX (2) can be regarded as the diameter of the coin. With this measurement method, the transmission holes 33A, 33 of the image sensors 31A, 31B
When the coin C passes through the line B, the denomination can be determined based on the diameter. Here, it is easier to calculate if both the diameter l and the length a are expressed in bit numbers, so in the following, the diameter l
and the length a is expressed as the number of bits L [bit] and A [bit], which are converted into 1 bit 28 [μm], and L [bit] = A [bit] + (n1 + n2) ... (3). By the way, regarding the A bit, the distance a between the image sensors 31A and 31B is attached to the substrate 35, and varies from device to device due to variations in assembly and variations in the arrangement of photodiodes in the image sensors 31A and 31B. , the value of the A bit must be determined before using the device. Therefore, how to determine the A bit will be explained below as a setting mode for the initial reference value BIAS. First, we poured eight 1 yen coins as samples,
Calculate the average value of (n1 + n2), which can be considered as the diameter. Here, since the diameter l of a 1 yen coin is 20 [mm], the number of bits corresponding to this diameter is 20 [mm] ÷ 28 [μ
m] = 714 bits, so A bit = L bit - (n1 + n2) = 714 - (n1 + n2) ...(4) Find the A bit, and store the A bit value in RAM 15.
is stored in the initial reference value memory BIAS. Then, if the A bit value stored in this initial reference value memory BIAS is determined and the maximum value MAX of equation (2) for each coin can be measured, then L [bit] = A value of BIAS + (n1 + n2) max
...(5) The diameter of the coin can be measured. In addition,
The coin shown here (1 yen) and the number of samples (8
times) can be changed arbitrarily. Here, the relationship between the basic number of bits of each coin and the denomination identification bit range is shown in Table 2 below.

[Table] The lower value (mm) of the basic bit value in Table 2 indicates the diameter of the coin, and the CN column is 5
Since the diameters of yen coins and 100 yen coins are close to each other, and it is difficult to distinguish between the two due to wear and other factors, the coins are distinguished by their materials. Regarding US coins, it is as shown in Table 3 below.

[Table] In addition, the CPU 100 calculates the amount of light blocking of the image sensors 31A and 31B by the coin C bit CAD (=n1+
n2) reaches the scanning start value "250", it is assumed that the coin is passing, and the maximum value of the light shielding amount bit CAD is measured, and the CAD decreases to the scanning end value "200". Number of scans up to
PFG is also measured. Therefore, this number of scans PFG
If PFG is 100 or more, the coin is not determined to be normal and an abnormal signal AL is output. If the number of scans PFG is 3 or less, it is not determined to be a normal coin and the process moves on to measuring the diameter of the next coin. On the other hand, image sensors 31A, 31
The scanning time of B is, for example, 512 [μs], and if the passing speed of the coin is 800 [mm/s], the distance that the coin moves in one scanning time is about 0.4 [mm]. The material signal MSD is the image sensor 31A, 3
Synchronized with the scanning time of 1B, at intervals of 512 [μs]
Always read by the CPU 100. In other words, the material signal MSD changes every time the coin moves 0.4 mm along the aisle.
It is read into the CPU 100. The read material signal MSD is then stored in the material detection memory n of the RAM 102.
1 to n15, and when a new material signal is written to the material detection memories n1 to n15, the nth previous material signal is erased. Here, the coin first passes over the material sensor 34, moves a certain distance, and then passes over the image sensor 31A,
It reaches the light receiving section line 31B. When the number of bits of the video signal VDS reaches "250" on the light receiving line of the image sensors 31A and 31B, the number of bits is the highest among the material signals stored in the 15 material detection memories n1 to n15. Material signal with many
The material of the coin is determined by max. By the way, the distance the coin travels from passing over the material sensor 34 until it reaches 250 bits on the light receiving lines of the image sensors 31A and 31B is as follows.
It can be regarded as approximately 6 [mm]. Therefore, the number of material detection memories n1 to n15 may be 15 (6/0.4=15). Next, an example of the memory map of ROM 101 is shown in the first example.
To explain with reference to Figure 0, the denomination identification bit range memory stores bit data corresponding to Table 2, and stores the minimum bit value and maximum bit value for each denomination. . The reason why the minimum value and maximum value are provided with an allowable range in this way is to cope with wear and variation of the coins. And image sensors 31A, 31
a scan start value memory for setting and storing the scan start bit value (“250” in this example) by B;
A scan end value memory that sets and stores the scan end bit value (“200” in this example), and stores the maximum value (“100” in this example) and minimum value (“3” in this example) of the number of scans PFG. It is equipped with a scanning number setting memory. In addition, as shown in FIG. 11, the RAM 102 includes a material detection memory, an initial reference value memory (BIAS), a light shielding amount memory (CAD), a scanning number memory (PFG), and an addition memory (MAD).
and maximum coin diameter memory (COL).
Material detection memory has 15 memory areas n1 to n15
It has an area for storing the maximum value n·max among these values. Furthermore, the RAM 102 includes batch memories p1 to pn for each denomination and count memories q1 to qn for each denomination.
It has a flag area for instructing each device to drive in the ON state. That is, a start flag SF commands the start of operation of the device,
Clear flag CF to initialize each device,
Motor M1~ for driving motors M1~M3
M3 flags M1F to M3F, solenoid 24 and 45 flags S1F and S2F for driving solenoids 24 and 45, foreign object display flag FMF that is turned on when a foreign object is detected, cleaning display flag for operating cleaning mechanism 50 Each area of CLF. Here, when the foreign object detection mode is activated, output port 2
A foreign object check signal FCS ("H" level) is outputted from 03, the one-shot multi 221 becomes operational, and the AND circuit 223 becomes operational. Then, the video signal VDS from the image sensor 31A is transmitted to the A of the one-shot multi 221.
When input to the terminal and receiving light normally, the video signal VDS sequentially outputs "H" level pulses at a predetermined period, so one shot multi 2
21 is the output of the one-shot multi 221 due to the fall of the "H" level pulses that are sequentially output.
MS is held at "H" level. However, if the light is blocked by a foreign object, the video signal VDS
is held at a constant potential of "L" level with no falling pulse, and the output of the one-shot multi 221
MS becomes "L" level, and the counter 222 receives the clock pulse from the basic clock generation circuit 201.
Count CP. Then, when the output MS is held at the "L" level and the count value of the counter 222 reaches "8", the output CV becomes the "H" level and is input to the latch circuit 213A via the AND circuit 223 and the OR circuit 214A. Ru. Note that the counter 22
If the output MS reaches the "H" level before the count value of 2 reaches "8", the output CV will not reach the "H" level either, assuming that the light shielding is not caused by a foreign object. Furthermore, when the counter 222 counts "8" or more and a foreign object is detected, a foreign object detection signal FMS is output from the output port 208. Next, the operation of the coin sorting and counting machine is shown in Figures 12 A to D.
This will be explained with reference to the flowchart. When the counting operation starts, the power is turned on and each part is reset (steps S1 and S2).
Flag M3F of RAM102 via CPU100
Turn on (step S3). As a result, the motor M3 is rotationally driven, and the driving disk 55 connected by the motor shaft 57 is rotated, so that the actuating member 51 that engages with the driving pin 56 is moved in the D1 direction using the shaft 53 as a fulcrum. moved in the D2 direction,
The surface of the light source 32 is cleaned by a cleaning material 52 attached to the upper part of the operating member 51. In this case, the number of times the actuating member 51 is driven is detected by the limit switch 54 that engages with the engagement piece 51B, and the light source 32 is
Flag M of RAM102 when cleaning is performed
Reset 3F (steps S4, S5). In this way, the cleaning of the light source 32 is completed, and by turning on the start switch 111 (step
S6), resets the amount data display section 105, resets the foreign object display flag FMF and cleaning display flag CLF of the RAM 102 (step S7), resets the solenoid flag S1F (step S8), and resets the motor flags M1F and M2F.
By turning on the motors M2 and M3 are driven (step S9). As a result, the rotary plate 8 shown in FIG. 1 is rotated, and the coin stopping and scraping rollers 6A to 6D are rotationally driven. Next, after checking whether the stop switch 113 is turned off (step S10),
A determination operation as shown in FIGS. 13A and B of the flowchart described later is performed (step S100), and if an abnormality is detected in the determination operation of step S100,
The process proceeds to the abnormality processing routine shown in FIG. 12B, and if no abnormality is detected, foreign object detection is performed (step S30). In this foreign object detection (step S30),
As mentioned above, the presence or absence of a foreign object is detected by outputting the foreign object check signal FCS from the output port 203. If a foreign object is detected, the process proceeds to a foreign object processing routine as shown in FIG. 12C, and if no foreign object is detected, corresponds to the corresponding denomination counting memory q in RAM102.
"+1" is counted from 1 to qn (step S40). If the count memories q1 to qn by denomination match the set number, the batch processing routine shown in FIG. Steps S50, S60), and if detected within a predetermined time, return to step S10. In addition, if no detection is detected for a predetermined period of time, a stop process is performed in step S70, and this stop process is performed first.
The motor flag M1F of the RAM 102 is reset (step S71), and the solenoid flag S1F is turned on to operate the solenoid 24 (step S72). As a result, as shown in FIG. 3, the collection piece 22 coupled to the plunger 25
When the collecting piece 22 rotates about the fulcrum and protrudes from the collecting window 21, the coins C rolling through the coin passage are collected into the hopper 10.
Then, after turning on the solenoid flag S1F,
After 2 seconds have passed (step S73), the motor flag M2F is reset (step S74). As a result, the rotation of the motor M2 is stopped, and the rotational drive of the coin stopping scraping rollers 6A to 6D is stopped. After the above-described stop processing (step S70) is completed and it is determined whether or not to restart (step S80), if it is a restart, the process returns to step S6, and if it is not a restart, the process returns to step S6. stops operation by turning off the power (step
S90). On the other hand, in the abnormality processing routine shown in FIG. 12B, the above-mentioned stop processing (step S70) is first performed (step S21), and the pressing piece 41 shown in FIG. 3 is activated by turning on the solenoid flag S2F of the RAM 102. The rolling coin C is held between the back wall portion 2 and the holding portion 41A, and the alarm 106 is activated (steps S22 and S23).
Then, it is determined whether or not the cover 11 is open (step S24), and if the cover 11 is open, the solenoid flag S2F of the RAM 102 is reset (step S25), and the back wall part 2 and the holding part 41A are connected again. A space is formed between the coin C and the coin C so that the coin C can roll. Then, the process returns to step S80 described above. In the foreign matter processing routine shown in FIG. 12C, first, the above-mentioned stop processing of step S70 is performed (step S31), and then the cleaning display flag CLF of the RAM 102 is turned on (step S32).
Motor M3 is driven by turning on motor flag M3F (step S33). As a result, the drive disk 55 coupled to the motor M3 is rotated,
As mentioned above, the light source 3 is removed by the cleaning material 52.
2 surface is cleaned twice (step
S34), then the motor flag M3F is reset (step S35), and the process returns to step S80.
Furthermore, in the batch processing routine shown in FIG. 12D, a stop processing is similarly performed (step S51),
Counting is performed in batch memories p1 to pn for each denomination in the RAM 102, and the denomination data display section 105
(step S52). Then, the process returns to step S80 described above. Here, the determination operation will be explained with reference to the flowcharts shown in FIGS. 13A and 13B. First, when the coin discrimination operation starts, the basic clock signal from the basic clock generation circuit 201 is
The image sensors 31A and 31B are driven by the CP, and 1-bit scanning is performed first (steps S101 and S102).
The video signals VDS, VDS' output from the counting circuits 211A, 211B are counted (step
S103). Further, the counting circuits 212A and 212B count the basic clock signal CP (step S104), and determine whether the count value of the counting circuits 211A and 211B is "8" (step S105). If the count values of the counting circuits 211A and 211B are not "8", a foreign object check signal FCS is output (step
S106), the above-mentioned operation is repeated, and when the count value is "8", the counting circuits 211A and 211B output coincidence signals CUS and CUS' (step S107), whereby the latch circuits 213A and 213B , 212B are latched (step S108). Further, the material of the coin is detected by the material sensor 34, and a material signal from the material detection circuit 206 is sent.
MSD via input port 207 and CPU10
0 to the material detection memory n1 of the RAM 102
n15 (step S109). moreover,
The count values MCD and MCD' latched in the latch circuits 213A and 213B are input to the input ports 204 and 205.
and is added to the addition memory MAD of the RAM 102 via the CPU 100 and stored (step S110), and it is determined whether the value of the addition memory MAD is "250" set in the scan start value memory of the ROM 101. (step S112), and if the scan start value is not “250”, the step described later is executed.
Proceed to S140. Then, the CPU 100 determines whether one scan is completed or not, and adds "+1" to the scan number memory PFG in the RAM 102 (step S113,
S114). Then, the material signal MSD with the highest frequency among the material detection memories n1 to n15 is stored in the memory n・max (step S114), and the light shielding amount CAD is the added value.
Determine whether it is greater than or equal to MAD (step
S115), if it is small, add the light shielding amount CAD
MAD (step S116). Next, the value of the scanning number memory PFG is set to ROM10.
1. Determine whether the number of scans is greater than the maximum value "100" stored in the memory for setting the number of scans (step 1).
S117), and if the maximum value is "100" or more, an abnormal signal AL is output from the output port 208 (step S119), and each part is reset (step S119).
S131). If the number of scans PFG is less than "100", it is further determined whether it is greater than or equal to the set minimum value "3" (step S118), and if it is greater than "3", the additional value MAD is is smaller than "200" stored in the scan end value memory of the ROM 101 (step S120). If the additional value MAD is ``200'' or more, the process proceeds to step S140, which will be described later. (n1+
n2) and the light shielding amount CAD indicating the length, and the added value is stored in a predetermined area of the RAM 102 as the coin diameter COL (step S121). The maximum and minimum values for each coin are stored in the ROM 101, and are compared with the maximum coin diameter COL stored in the RAM 102 (step S122). In this case, first CN
It is determined whether the value is in the column (step S123), and if this is not the case, it is determined whether or not there is a corresponding value in 1 yen coins to 500 yen coins (step S124), and if there is a corresponding denomination. Further, the denomination is compared with the denomination detected by the material sensor 34 (step S125). Then, when the identification by diameter and the identification by material match, the corresponding denomination signals m1 to m6 are output from the output port 208 (step S126), and when they do not match, a counterfeit coin signal m8 is output (step S130). ). Also,
In step S124, if there is no corresponding value, the counterfeit currency signal m7 is output from the output port 208. On the other hand, if the diameter in the CN column is determined in step S123, it is determined whether the material n・max in the material detection memory is a 5 yen coin (CuZn) or a 100 yen coin (CuNi). S128,
S129), if it is determined to be 5 yen or 100 yen,
The corresponding denomination signal m from the output port 208
3 or m4 is output (step S126). In addition,
If the material does not correspond to the material of 5 yen or 100 yen, a counterfeit currency signal m8 is output from the output port 208 (step S130). By the way, in step S140, the foreign object detection circuit 2
The count value CV of the counter 222 in 20A, 220B (220A will be described here) is "8"
If it is "8", an "H" level signal is output from the AND circuit 223 (step S141), and the process proceeds to step S108 described above.
After performing the processing in S110, it is determined whether MAD=8 or more (steps S142 and S143). If MAD is 8 or more, a foreign object detection signal FMS is output from the output port 208 (step S144),
If it is smaller than "8", each part is reset (step S115). Furthermore, if the count value of the counter 222 is not "8", the CPU 100 determines whether one scan (256 bits) has been performed (step
S140, S145), each part is reset when one scan is completed. As described above, according to the present invention, the pressing piece of the coin holding mechanism in the passage section presses and holds the abnormal coin against the back wall part and stops it, while the collecting piece of the collecting mechanism holds the abnormal coin next to the abnormal coin. Since the coins and subsequent coins are collected in the hopper, the coins do not become clogged in the passage, and since the abnormal coins are held under pressure by the pressing piece, there is an advantage that abnormal coins can be easily identified. In the above description, the coin holding mechanism is operated by driving a solenoid, but it is also possible to use a driving means such as a motor, and in this embodiment, the pressing piece is moved from the solenoid through a transmission mechanism. However, the present invention is not limited to this example, and the coin may be held by directly moving the pressing piece using a solenoid or a motor. In addition, although this example uses both an optical sensor and a magnetic material sensor, the sensor is not limited to this example. For example, depending on foreign coins such as the United States, only the outer diameter However, there are some materials that can be sufficiently selected, and in that case, the material determination using the material sensor may be omitted.

[Brief explanation of drawings]

Fig. 1 is a mechanical diagram showing an example of a coin sorting device to which this invention is applied, Fig. 2 is a sectional view thereof, and Fig. 3 is a schematic structural diagram of a portion including a coin holding mechanism to which this invention is applied. 4 is a schematic plan view of the coin detection section, FIG. 5 is a sectional view thereof, FIG. 6 is a schematic structural diagram of the cleaning mechanism, and FIG. 7 is a block diagram showing the control system of the coin sorting device to which the present invention is applied. 8 is a block diagram showing a control system for coin detection according to the present invention, FIG. 9 is a wiring diagram showing a configuration example of an image sensor used in this invention, and FIG. 10 is a block diagram showing a control system for coin detection according to the present invention.
FIG. 11 is a diagram showing an example of the contents of the RAM, FIG. 12 A to D, and FIG. 13 A.
B is a flowchart showing an example of the operation of the present invention. 1... Coin passageway, 2... Back wall section, 3A to 3D...
...Chute, 4...Bearing, 5...Shaft, 6A to 6D
... Coin stop scraping roller, 7 ... Coin feeding device, 8 ... Rotating plate, 9 ... Notch, 10 ... Hopper, 11 ... Cover, 12 ... Handle, 13 ... Limit switch, 20 ... Coin collection mechanism, 21...
... collection window, 22 ... collection piece, 24 ... solenoid, 25 ... plunger, 30 ... coin detection section,
31 (31A, 31B)...Image sensor, 3
2...Light source, 33 (33A, 33B)...Transmission hole, 34...Material sensor, 35...Substrate, 36
A, 36B... Retaining wall, 37A, 37B... Light receiving window, 40... Coin holding mechanism, 41... Pressing piece, 4
1A... Holding part, 43... Operating piece, 45... Solenoid, 46... Plunger, 47... Spring, 50... Cleaning mechanism, 51... Operating member, 51A... Engagement hole, 51B... Engagement piece, 52
... Cleaning material, 54 ... Limit switch, 55 ... Drive disk, 56 ... Drive pin, 10
0...CPU, 101...ROM, 102...
RAM, 103, 104, 107...driver, 1
05...Amount data display section, 106...Alarm device,
110...Switch group, 111...Start switch, 112...Clear switch, 113...Stop switch, 200...Discrimination processing section, 201
... Basic clock generation circuit, 202 ... Timing pulse generation circuit, 203, 208 ... Output port, 204, 205, 207 ... Input port, 2
10A, 210B...Shade portion length measurement circuit, 21
1A, 211B, 212A, 212B... Counting circuit, 213A, 213B... Latch circuit, 214
A, 214B...OR circuit, 220A, 220B
... Foreign object detection circuit, 221 ... One shot multi, 222 ... Counter, 223 ... AND circuit.

Claims (1)

[Claims] 1 Coins of multiple denominations stored in the hopper,
In a coin sorting and counting machine that sorts and counts coins by denomination by discharging them through a tilted disk to a sorting section for sorting by denomination, the coins discharged by the tilted disk are , a passage part that rolls and feeds to the shape sorting part while one side thereof is in contact with the back wall part, and a coin that is disposed in the passage part in order to detect abnormal coins that are rolled and sent through this passage part. and a pressing piece for pressing and holding the rolling and sent abnormal coin between the back wall part and the abnormal coin holding member disposed on the downstream side of the sensor in the passage part. a first drive unit for operating a pressing piece of the holding mechanism when the sensor detects the abnormal coin being rolled and sent;
disposed at a position upstream of the sensor in the passage section,
a collection mechanism having a collection piece that can protrude into the passage to collect the next coin after the abnormal coin detected by the sensor and the subsequent coins to the hopper;
An abnormal coin holding device in a coin sorting and counting machine, comprising: a second drive unit that operates a collecting piece of the collecting mechanism.