JPS603084A - Coin selector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a coin sorting device that determines and sorts the thickness and diameter of coins thrown into a coin orbit.

[Prior art]

Conventionally, as this type of coin sorting device, the
As disclosed in Publication No. 96, the side walls on both sides of the coin passage are inclined at a predetermined angle with respect to the vertical plane so that the coin surface comes into contact with the side wall on one side. Sorting coils of different thicknesses and diameters, each driven by an oscillation signal of a different frequency, are arranged on the side wall for each type of coin to be sorted, and when an input coin reaches the coin orbit where each sorting coil is arranged, , there is one that extracts a signal corresponding to the difference in thickness and diameter of the inserted coin and, based on this signal, determines and sorts the authenticity of the inserted coin for each type of coin.

However, in this conventional device, it is necessary to continuously arrange a sorting coil along one side wall to sort out the thickness and diameter of each type of authentic coin, so the coin passage for sorting is difficult. There is a drawback that the length increases, and the overall shape increases accordingly. Furthermore, since a sorting coil and an oscillation circuit are required for each type of authentic coin, the number of parts increases, resulting in high cost. Furthermore, when inserting coins, it is necessary to drive all the sorting coils and oscillation circuits for each type, and since the sorting coils are arranged continuously along the coin trajectory, it is necessary to determine the authenticity of the inserted coins. In order to do this, the sorting coil and the oscillation circuit must be driven for a relatively long time, which has the disadvantage of increasing power consumption. Also, there are signals related to both the thickness and diameter of coins!
(Because it judges false (7), it is not possible to judge only the thickness or diameter, and there is a risk of misjudgment due to the synergistic effect of thickness and diameter. .

[Object and structure of the invention]

The present invention was made to solve the above-mentioned drawbacks, and its purpose is to provide a compact, inexpensive, and highly reliable
Another object of the present invention is to provide a coin sorting device that consumes less power.

To this end, the present invention arranges a thickness screening coil on the side wall of the coin track that is inclined at a predetermined angle to the vertical plane, on the side that does not contact the coin surface, and applies a harmonic magnetic field to the coin track space toward one side wall. The thickness sorting coil outputs an output voltage corresponding to the impedance change that occurs depending on the gap between the coin and the opposing surface, and the thickness of the coin is determined and sorted based on this output voltage. This is what I did. Further, a diameter sorting coil is arranged on the side wall on the coin surface contact side opposite to the thickness sorting coil to form a harmonic magnetic field in the coin orbit space in the diametrical direction of the coin. The output voltage corresponding to the impedance change that occurs depending on the diameter of the coin is extracted from the coin, and the diameter of the coin is determined and sorted based on this output voltage.

〔Example〕

FIG. 1 is a diagram showing an example of a coin trajectory in a seven-day public telephone to which the present invention is applied, and a coin trajectory 3 extending from a coin slot 1 to a storage section 2 includes a coin insertion detection sensor 4. Material sorting device 5. A thickness sorting coil 6, a diameter sorting coil 7, and an accumulation lever 8 are arranged, and a coin input slot 1 is arranged.
After the coin CN inserted from the input sensor 4 is detected by the input detection sensor 4, the material is sorted by the material sorting device 5, and then it is passed through a thickness sorting coil 6 and a diameter sorting coil 7.
When the coins are determined to be genuine, the storage lever 8 is driven to the storage side (the side shown by the broken line) and the coins are stored in the storage section 2. (7) If the currency is determined to be a counterfeit currency, the storage lever 8 is not activated and the currency is returned to the return unit 9.

By the way, the thickness sorting coil 6 and the diameter sorting coil tC1 are arranged opposite to each other with the coin track 3 interposed therebetween.

Figure 2: Detailed f1 of these coils 6 and γ
2 is a cross-sectional view taken along line A-A in FIG.
．． The coin is tilted by 'L-' and the coin 5jli'cN inserted from the coin input tXJ1 rolls to the first flow side while contacting one side wall (C4R is configured. A winding coil 6 for selecting 1/+:1 movement is arranged on the wall 3A.

On the other hand, a diameter selection coil 1 wound around a bobbin 11 having a diameter slightly larger than the diameter of the coin CN is disposed on the side wall 3B on the side where the coin surface comes into contact. .

FIG. 3 is a block diagram showing an embodiment of the overall configuration of a coin sorting device including sorting coils 6 and 7. In the same figure, 12 is an oscillation circuit that applies a high-frequency oscillation signal of a predetermined frequency to the coil 6 for thickness ju, 13 is an oscillation circuit that applies a high-frequency oscillation signal of a predetermined frequency to the diameter selection coil 7, and 14 and 15 are filter circuits that output low frequency signals of a predetermined frequency or higher from the output signals between the terminals of coils 6 and 7 that vary depending on the thickness and diameter of the inserted coin; 16 and 17 are filter circuits 14 and 15; A rectifier circuit rectifies each output signal, 18 is an AD converter that selectively converts each rectified output voltage of the rectifier circuits 16 and 17 into a corresponding digital signal, and 19 is an AD converter that causes coils 6 and 7 to detect genuine coins. A read-on memory (ROM) 20 stores thickness data and diameter data of authentic coins for each type of authentic coin, as well as a processing program for determining authenticity; The digital signal regarding the thickness and diameter of the inserted coin is read in and compared with the thickness data and diameter data stored in the ROM19 in advance to determine the authenticity of the inserted coin.
It is a computational processing unit (CPS).

Next, the operation of the coin sorting device constructed as above J5 will be explained based on the flowchart shown in FIG.

First, after the power is turned on, the CPLI 20 monitors whether a coin insertion detection signal is generated from the insertion detection sensor 4 due to the insertion of a coin. The subsequent processing is executed every time a coin is inserted. That is, when a coin is inserted, the CPU 20 goes to step 101, turns on the power to the oscillation circuits 12 and 13, and applies high frequency oscillation signals to the 2N thickness sorting coil 6 and the diameter sorting coil 7, respectively. Then, the thickness screening coil 6 forms a high frequency magnetic field in the direction shown by the dashed line X in FIG. 2, and the diameter screening coil 7 forms a high frequency magnetic field as shown by the broken line y. Thereafter, in step 102, the CPU 20 executes a material sorting process using the material sorting device 5, and if the material is determined to be appropriate, in the next step 104, the CPU 20 selects the thickness of the inserted coin from the AD converter 18. Read the digital signal for height and diameter. That is, when the inserted coin is transferred to the orbit where the thickness sorting coil 6 and the diameter sorting coil 7 are arranged, the impedance of the high frequency magnetic circuit formed by these coils 6 and 7 changes. These coils 6 vary depending on the thickness and diameter of the coin.
The output voltage between terminals 7 and 7 changes according to changes in impedance, and after removing high frequency signal components by a filter circuit 14.15, the output voltage is rectified by a rectifier circuit 16.17, as shown in FIG. 5(a).

As shown in (b), rectified output voltages R and R having peak levels corresponding to the thickness and diameter of the inserted coin cannot be obtained. Therefore, the CPU 20 switches the input of the AD converter 1B to the rectifier circuit 16 side and the rectifier circuit 17 side at a predetermined period, and pumps the rectified output voltage according to the primary color and diameter of the inserted coin at a predetermined period. A digital signal is read from the output of this AD converter 18.

After reading the digital signals corresponding to the thickness and diameter of the inserted coin in this way, the CPU 20 proceeds to step 105.
2, the diameter data for each type of authentic coin recorded in advance in the ROM 19 is read out, and the maximum value of the diameter data of each type and the digital signal regarding the diameter of the inserted coin read from the AI) converter 1B is read out. compared with the digital signal indicating

As a result, the value of the digital signal indicating the maximum value is indicated by the diameter data of any genuine coin. If the value is within the range of 5'-161, it is determined that the diameter of the inserted coin at this time is appropriate. That is, as shown in the waveform diagram of FIG. 5, if the rectified output voltage R corresponding to the diameter of the inserted coin is between the peak value RP indicated by the diameter data of any type of genuine coin and RP2, The diameter of the inserted coin at this time is determined to be suitable.

The CPL 120 then performs step 1 as before.
At 06fC, the digital signal indicating the maximum value among the digital signals regarding the thickness of the inserted coin is compared with the thickness data for each type of genuine coin, and the digital signal indicating the maximum value is indicated by one of the thickness data. If the value is within the allowable range, it is determined that the thickness of the inserted coin at this time is appropriate. In other words, as shown in the waveform diagram of FIG. 5, if the rectified output voltage corresponding to the thickness of the inserted coin is between the peak value DPI and DP2 indicated by the thickness data of any type of authentic coin, then , it is determined that the thickness of the inserted coin at this time is suitable.

The CPU 20 determines the material, diameter, and thickness of the inserted coin in this way, and if all of them are found to be suitable, the CPU 20 determines that the coin inserted at this time is a genuine coin,
In order to accumulate these coins, the coin detection process of step 107 is executed, and here the accumulation lever 8 is driven to the accumulation side. As a result, the inserted coins are accumulated in the accumulation section 2. Thereafter, the CPU 20 turns off the power to the oscillation circuits 12 and 13 in step 108, and returns to the initial state.

Therefore, the oscillation circuit 12.13 and the screening coil 6.7
will operate for a predetermined time t until the processing shown in FIG. 4 is completed.

In this embodiment, the rectified output voltage obtained by the rectifier circuit 16, IT is converted into a digital signal and the thickness of the authentic coin is compared with data and diameter data. A peak hold circuit may be provided on each side, and the peak value output of each peak hold circuit may be compared with a reference signal regarding the thickness and diameter of a genuine coin by analog signal processing.

〔Effect of the invention〕

Above explanation 12. /Thus, the present invention provides a thickness screening coil that is inclined at a predetermined angle to a vertical plane, and a thickness sorting coil is disposed on the side of the side wall of the coin track that is not in contact with the coin surface. A harmonic magnetic field is formed between the coins, and an output voltage is taken out from this thickness selection = 1 blade in response to the impedance change that occurs depending on the gap between the coin and the opposing surface, and based on this output voltage. In order to judge and sort the thickness of the coin, a diameter sorting coil is placed on the side wall on the side that contacts the coin surface, facing the force sorting coil, A harmonic magnetic field is formed in the coin orbit space toward which the coin is heading, and an output voltage corresponding to the impedance change that occurs depending on the diameter of the coin is extracted from this diameter sorting coil, and the diameter of the coin is determined and sorted based on this output voltage. This is what I did.

Therefore, there is no need to provide a sorting coil for each type of coin, the coin passage for sorting can be shortened, and the overall shape can be made smaller.

Furthermore, the number of parts is reduced, making it possible to reduce costs and power consumption at the same time. Furthermore, since only the thickness or diameter can be determined, reliability is high and there is no risk of erroneous sorting. Therefore, it is extremely effective when used in public telephones powered by a central office, where the coin trajectory cannot be long and power consumption is regulated.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a coin trajectory in a public telephone to which the present invention is applied, FIG. 2 is a sectional view showing the detailed configuration of a thickness sorting coil and a diameter sorting coil, and FIG. 3 is a diagram showing an example of a coin trajectory in a public telephone set according to the present invention. FIG. 4 is a flowchart showing the procedure of the coin sorting process, and FIG. 5 is a diagram showing the rectified output voltage waveform obtained according to the thickness and diameter of the coin. be. 1... Coin slot, 3... Coin track, 3A, 3
n... Side wall, 6... Coil for thickness selection, 7...
... Koinope for diameter selection 8 ... Accumulation lever, 10
, 11j--Bobbin, 12゜13--Oscillation circuit, 14.15--Filter circuit, 16,1γ--Fist rectifier circuit, 18--AD converter, 19...・・R
OM, 20・Conflict・CPU. Patent applicant: Tamura Electric Manufacturing Co., Ltd. Representative: Masaki Yamakawa (and one other person) Figure 4 Figure 5

Claims (1)

[Claims] (1) In a coin sorting device in which the side walls on both sides of a coin passage are inclined so that the coin surface comes into contact with the side wall on one side, and a coin sorting coil is arranged along the coin passage, the coin surface non-contact side A thickness sorting coil is arranged on the side wall of the coin and is driven by an oscillation signal of a predetermined frequency so that the voltage between the terminals changes according to the thickness of the coin. A storage means for storing the thickness signal of the genuine coin obtained, and a determination means for comparing the output voltage of the thickness sorting coil and the thickness signal of the genuine coin to determine the authenticity of the coin. Coin sorting device. In a coin sorting device, the side walls on both sides of a coin passage are inclined so that the coin surface comes into contact with the side wall on one side, and a coin sorting coil is arranged along the coin passage. A thickness sorting coil is placed on the side wall and is driven by an oscillation signal of a predetermined frequency so that the voltage between the terminals changes depending on the thickness of the coin, and a thickness selection coil is placed on the side wall on the side that contacts the coin surface and is driven by an oscillation signal of a predetermined frequency. A diameter sorting coil that is driven by a signal and whose terminal voltage changes according to the diameter of the coin, and a genuine coin thickness signal obtained by having the thickness sorting coil and the diameter sorting coil detect genuine coins in advance. and a storage means for storing the diameter signal, and a determination means for comparing each output voltage of the J thickness sorting coil and the diameter sorting coil with the thickness signal and the diameter signal to determine whether the hardness 9i is true or false. Coin sorting device equipped with