JP2002049952A - Automatic change dispensing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic change dispersing device capable of preventing sticking of dust to the operation part of an optical sensor for detecting a coin by simple constitution. SOLUTION: When the dust, etc., is heaped near the operation part of the optical sensor 26, an air feeding part 36 is pressurized to reduce a capacity to jet air from the tip of a tube 37. Thus, the dust heaped near the operation part of the sensor 26 can be blown away completely, and it is possible to prevent sticking of the dust to the operation part of the sensor 26 for detecting the coin C by simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an automatic change dispensing apparatus.

[0002]

2. Description of the Related Art Conventionally, a plurality of coin storage sections divided for each denomination are arranged in parallel, and these coin storage sections are arranged in a number of 1, 5, 10, 50, 100, 500 yen. POS (Point O), which stores coins and is a product sales registration data processing device
There is an automatic change dispensing device for dispensing coins in a coin storage unit to a coin payout exit by a belt when there is a change according to a command from a f Sales) terminal or an ECR (Electronic Cash Register).

In such an automatic change dispensing device, the operation of each section is controlled by detecting the quality of the coin being transported.
In order to count the number of coins stored in the coin storage unit or the number of coins paid out from the coin storage unit, an optical sensor is arranged in the coin transport path.

One example is shown in FIG. In this example, in order to pay out the coin C in the coin storage unit 101 storing coins C by denomination to a coin payout port (not shown), the coin storage unit 1 is used.
Payout belt 10 extending from the bottom of 01 to the coin payout exit
2 are provided. The payout belt 102 is suspended around a driving roller 103 and a driven roller 104, respectively. At the exit of the coin storage unit 101, a separation roller 105 for separating the coins C one by one is provided. At the downstream side of the separation roller 105, the coins C are temporarily stopped for each denomination and necessary. The coin shutter 106 whose operation is controlled to feed out the number of coins C is
7, and is supported rotatably. These coin shutters 106 hold the leading coin C on the payout belt 102 at one end 106a, but rotate around the support shaft 107 when the shutter solenoid 108 connected to the other end is driven to specify the coin. It is configured to pay out coins C by the number of coins. Further, immediately after each coin shutter 106, a payout sensor 109 as an optical sensor for counting the number of paid out coins C is provided for each denomination. The payout sensor 109 includes a light receiving element 109a and a light emitting element 10
9b is a transmission-type sensor in which the light-receiving sensor 9b is disposed to face. And
A through hole 111 is formed in the guide plate 110 which supports the payout belt 102 and defines the transport path of the coin C. The light receiving element 109a and the light emitting element 109 are formed with the through hole 111 interposed therebetween.
b are vertically opposed to each other.

Accordingly, the coin C in the coin storage unit 101 is
By rotating the payout belt 102, the coin is conveyed until it comes into contact with one end 106a of the coin shutter 106, waits for payout, and is paid out when the shutter solenoid 108 is driven to open the coin shutter 106.
The coins paid out at this time are detected by the payout sensor 109, and the number of coins paid out is counted by incrementing the counter each time the selection signal is output.

In such a change automatic dispensing apparatus, dust such as wear debris generated by the rubbing of coins C and dust or the like adhering to the conveying path or conveying member of the coins C adheres to the coins C. Dust is coin C or payout belt 102
And fall from the through-hole 111. For this reason, the light emitting element 109b located below the through hole 111 may become dirty, and the coin C may not be detected if left unattended.

Therefore, in such an automatic change dispensing apparatus, a cleaning member 112 for cleaning the light emitting element 109b disposed below the guide plate 110 is provided for each denomination. The cleaning member 112 shown in FIG. 6 is rotatably supported by a support shaft 113, and is configured to wipe off dust adhering to the surface of the light emitting element 109b by swinging the cleaning member 112. Further, the cleaning member 112 is provided with a spring 114 for urging the cleaning member 112 in one direction so as to separate from the light emitting element 109b when the hand is released, and the cleaning member 112 performs cleaning against the urging force of the spring 114. A stopper (not shown) for contacting the cleaning member 112 for stabilizing the member 112 at a fixed position is provided.

[0008]

However, in the automatic change dispensing apparatus provided with the cleaning member 112 as described above, the structure of the cleaning member 112 is complicated and a plurality of cleaning members 112 are provided for each denomination. Because of the necessity, there is a problem that the number of parts of the apparatus increases and the manufacturing cost increases.

It is an object of the present invention to provide an automatic change dispensing apparatus which can prevent dust from adhering to a working portion of an optical sensor for detecting coins with a simple structure.

[0010] It is an object of the present invention to provide an automatic change dispensing apparatus capable of simultaneously blowing off dust and the like deposited near the action portions of a plurality of optical sensors.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic change dispensing apparatus capable of cleaning the vicinity of an operation section of an optical sensor without requiring an operation for cleaning the optical sensor.

[0012]

According to the first aspect of the present invention,
A coin transport unit that transports the coin inserted into the coin insertion slot to the coin sorting position, a coin storage unit that stores the coins transported to the coin sorting position and sorted by denomination, and a coin in the coin storage unit. A coin dispensing unit that conveys and pays out the coin to a coin payout port, and an automatic change dispensing apparatus that includes at least one or more optical sensors for optically detecting coins on a coin transport path. Air injection means for injecting air toward the action section is provided.

Therefore, when dust or the like accumulates in the vicinity of the working portion of the optical sensor, air is sprayed to the working portion of the optical sensor by the air ejecting means, thereby accumulating near the working portion of the optical sensor. It is possible to blow off the dust and the like by air. This makes it possible to prevent dust from adhering to the working part of the optical sensor that detects coins.

According to a second aspect of the present invention, in the automatic change dispensing apparatus of the first aspect, the air injection means reduces the volume by receiving the pressure and discharges the internal air from the discharge port. Restoring means for restoring the pressed air supply unit to the state before pressing, and a position where one end is connected to the discharge port of the air supply unit and the other end faces the working unit of the optical sensor. And a hollow tube arranged at

Therefore, when dust or the like accumulates near the action section of the optical sensor, the volume is reduced by pressing the air supply section with a finger, and air is injected from the tip of the tube. This makes it possible to blow away dust and the like accumulated near the action section of the optical sensor and clean it. This makes it possible to prevent dust from adhering to the operating portion of the optical sensor that detects coins with a simple structure.

According to a third aspect of the present invention, in the automatic change dispensing apparatus of the second aspect, the tube is branched into a plurality of tubes.

Therefore, only by pressing the air supply unit once, it becomes possible to simultaneously blow off the dust and the like deposited near the working parts of the plurality of optical sensors.

The invention described in claim 4 is the first to third aspects of the present invention.
In the automatic change dispensing device according to any one of the above, the optical sensor includes a sensor cover having a light transmitting property and being electrically insulated.

Therefore, even if the electrostatically charged dust and the like are floating, the dust and the like do not adhere to the working portion of the optical sensor.

The invention according to claim 5 is the invention according to claims 2 to 4
In the automatic change dispensing device according to any one of the above, a drawer that can be stored and opened is provided below the coin payout unit, and the air supply unit is pressed by the drawer in accordance with the storing operation of the drawer. Be prepared for.

Therefore, when the drawer is stored, the air supply unit is pressed by the drawer, so that air is ejected from the tube, and dust and the like accumulated near the working part of the optical sensor are blown away. Become. Thus, for example, when the drawer is opened in response to the operation of the POS terminal, the cashier does not need to perform an operation for cleaning the optical sensor, and cleans the vicinity of the working portion of the optical sensor each time the drawer is stored. Therefore, the burden on the cashier can be greatly reduced.

[0022]

FIG. 1 shows a first embodiment of the present invention.
A description will be given with reference to FIG. The automatic change dispensing device of the present embodiment is applied to an automatic change dispensing device used by connecting to a POS terminal (not shown). Here, FIG. 1 is an external perspective view schematically showing the automatic change dispensing device 1, and FIG. 2 is a plan view showing the internal structure of the automatic change dispensing device 1.

As shown in FIG. 1 and FIG.
A coin insertion slot 2 having an upper opening into which coins C (see FIG. 3) are collectively inserted is provided in front of the right side of a. The coin insertion slot 2 is provided with a plurality of sets of insertion sensors 3 that photoelectrically detect the presence or absence of the coin C. And coin slot 2
The input roller 4 is provided at one end of the roller.
The coin insertion slot 2 and the coin insertion slot 2 form an insertion section 5. The input rollers 4 are arranged directly above the input belt 6 that conveys the coins C in a row with a gap through which one coin C passes. Further, the input roller 4 is connected to an input belt 6.
The direction of rotation is determined so that coins C other than the lowermost coin C are returned to the coin slot 2 when coins C are superimposed.

The feeding belt 6 has a transporting speed of the coins C which is increased so that the coins C can be transported at predetermined intervals by increasing the feeding speed.
Are connected. Further, another conveyor belt 8 is connected to the conveyor belt 7.

The conveyor belt 7 is provided with an outer diameter check section 9 having an optical sensor for checking the outer diameter of the coin C, and a denomination determining section (not shown) for determining the denomination of the coin C. ing. A reject overflow section 10 is provided ahead of the outer diameter check section 9. The reject overflow section 10 interrupts coin transport and removes the transported coin C when the transported coin C is not a genuine coin or when a coin storage section described later is full. . Further, a transport belt 11 that converts the transport direction to a right angle and transports the coins C to the coin sorting position is provided at the end portion of the transport belt 8. Then, the input roller 4, the input belt 6, and the transport belts 7, 8, 11
Thus, a coin transport unit that transports the coin C inserted into the coin insertion slot 2 to the coin sorting position is configured.

Next, a sorting hole 12 is provided for each denomination whose hole width dimension is sequentially increased along the conveyor belt 11, and is located at a coin sorting position where coins for sorting the conveyed coins by denomination are provided. A sorting unit 13 is formed. Sorting hole 12
2, six are provided from the right in FIG. 2 so as to correspond to respective denominations of 1 yen, 50 yen, 5 yen, 100 yen, 10 yen, and 500 yen. Each sorting hole 12 is provided with a counting sensor 14 for each denomination, and a coin C for each denomination.
Is counted.

Here, FIG. 3 is a perspective view showing the coin storage section 16 and the coin payout section 28 incorporated in the automatic change dispensing apparatus 1, and FIG. 4 is a longitudinal left side view thereof. The automatic change dispensing device 1 is connected to each of the sorting holes 12 to
Coin storage section 16 with an upper opening partitioned by denomination by 5
Is provided. At the bottom of each coin denomination of the coin storage unit 16, a payout belt 17, which is a transport belt connected to and driven by a motor (not shown), is provided so as to be suspended between a driving roller 19 and a driven roller 18. ing. The payout belt 17 is constituted by a pair of long and short endless belts, and is disposed so as to form an ascending surface whose height increases toward the downstream side in the coin transport direction. A separation roller 20 for separating the coins C one by one is provided at the outlet of the coin storage unit 16.
However, the coins are arranged at intervals so that one coin C can pass through the payout belt 17, and are arranged so as to cross the exits of all denominations for each denomination.

Further, at the exit of the coin storage section 16, a coin standby section 21 is provided for each denomination, in which a predetermined number of coins C are arranged in a line and made to stand by. The longer one of the payout belts 17 also extends to the coin standby unit 21 and reaches the coin payout position through the coin standby unit 21. Further, the coin holding unit 21 has a presser plate 2 sized so that two or more coins C do not overlap the payout belt 17.
2 are provided.

A guide plate 33 that supports the payout belt 17 and defines a transport path for the coins C is provided on the payout belt 17.
Are provided for each denomination. The guide plate 33 has through holes 34 formed therein.

In addition, as shown in FIG. 4, operation control is performed on the upper portion near the tip of each payout belt 17 so as to temporarily stop coins C by denomination and to send out a required number of coins C. The coin shutter 23 to be made is the spindle 2.
4 is supported so as to be freely rotatable. These coin shutters 23 hold the leading coin C on the payout belt 17 at one end 23a, but rotate around the support shaft 24 when the shutter solenoid 25 connected to the other end is driven to specify the coin. It is configured to pay out coins C by the number of coins. Further, immediately after each coin shutter 23, the payout sensor 26, which is an optical sensor for counting the number of coins paid out for each denomination, and the material of the coins C paid out for each denomination are inspected. And a payout check sensor (not shown) for checking whether the coin is a genuine coin. These payout check sensors are a type of magnetic sensor such as a proximity switch that reacts to metal. Here, a coin payout unit 28 having a conveyor belt structure configured to convey coins C stored in the coin storage unit 16 by denomination and drop them to a coin payout position is configured.

As shown in FIG. 4, the aforementioned payout sensor 2
Reference numeral 6 denotes a transmission type optical sensor having a light receiving element 26a and a light emitting element 26b.
4, the light receiving element 26a and the light emitting element 26b are vertically opposed to each other. That is, the optical axes of the light receiving element 26a and the light emitting element 26b coincide with the through hole 34,
The position of the optical axis is set at a position deviated from the center of coins C to be dispensed in a line. Note that, in the light receiving element 26a and the light emitting element 26b, the portions forming the optical axis as described above are each set as an action portion.
Further, the light emitting element 26b which is disposed on the lower side and on which dust and the like are liable to deposit is covered with a cup-shaped sensor cover 35 which transmits infrared rays and is electrically insulated, and has an upper surface and a periphery.

Further, the payout belt 17 of the coin payout section 28
As shown in FIGS. 1 and 2, a housing-shaped coin outlet 29 having an open upper surface is disposed at the coin payout position where the coin C is dropped by denomination. The drawer 3 that constitutes a drawer for storing bills and the like is provided in the space formed below the payout belt 17 and the coin payout port 29 which are components of the coin payout section 28 inside the main body case 1a.
0 is provided so as to be able to move back and forth in the front-rear direction (opening and closing direction) with respect to the main body case 1a under the control of the POS terminal. Further, a display 3 is provided on the left side of the main body case 1a.
1 and various operation units 32 are provided.

In addition, near the drawer 30, there is provided an air supply section 36 having a predetermined volume for storing air, and the bottom surface portion 36a is connected to the main body case 1 in FIG.
It is exposed on the left side of a. The air supply section 36 is formed in a bellows shape whose side surfaces can be freely extended and contracted. When the pressing of the bottom portion 36a is released, the air is naturally sucked into the bottom portion 36a, and the bottom portion 36a has a restoring means for restoring to a state before the pressing.
Note that the air supply unit 36 is not limited to the illustrated one, and various types such as a spherical one can be considered.

One end of a hollow tube 37 is connected to the outlet 36b of the air supply unit 36. The tube 37 is formed of a flexible synthetic resin or the like. On the other hand, the other end of the tube 37 is not particularly shown, but in the present embodiment, is branched into six from the middle, and each is located near the sensor cover 35 that covers the light emitting element 26b provided for each denomination. It is arranged. That is, by connecting the tube 37 to the discharge port 36b of the air supply unit 36, the air in the air supply unit 36 can be sent to various parts in the main body case 1a without taking up space. Therefore, the air supply unit 36 and the tube 37 constitute an air injection unit.

In such a configuration, when a coin C is inserted into the coin insertion slot 2, the insertion sensor 3 detects the coin C, and based on the detection signal, the input roller 4, the input belt 6, and the transport belts 7,8. , The conveyor belt 11 is driven.
The coins C inserted into the coin insertion slot 2 are separated and conveyed one by one between the input roller 4 and the input belt 6, and are conveyed by the conveying belt 7 with the interval between the coins C widened. You. In the process, the inserted coin C is determined by the outer diameter check unit 9 or a denomination determining unit (not shown) to be a genuine coin or a false coin. In the section 10, the coin conveyance is selectively interrupted and the coins C are dropped and removed. Further, even when the counting sensor 14 determines that one of the denominations stored in the coin storage unit 16 is full and a new coin C cannot be stored,
In the reject overflow section 10, the transport of coins is selectively interrupted, and the coins C are dropped and removed. The coin (reject overflow coin) dropped from the reject overflow unit 10 is stored in a reject overflow coin storage unit (not shown) below the coin.

If the coin C is a genuine coin and the coin storage section 16 is not full, the coin C is changed in direction from the conveyor belt 8 to the conveyor belt 11 and conveyed, and is sorted by the coin sorter 13 for each denomination. Is made. That is, the coin C falls from the sorting hole 12 according to the denomination, and is stored in the coin storage unit 16 for each denomination. The number of coins C dropped from the sorting hole 12 is counted by the counting sensor 14.

When there is no coin C in the coin standby unit 21, the operation is controlled so that the payout belt 17 is driven and a predetermined number of coins C are always present in the coin standby unit 21.

Next, when the closing process is performed at the POS terminal and a coin C payout command is issued from the POS terminal, the payout belt 17 is driven, and the coin shutter 23 is driven by the shutter solenoid 25 for each denomination. Therefore, the required number of coins C are sent out. The coin C thus sent out is paid out to the coin payout port 29.

The coin C paid out in this manner is detected as having passed through the output of the light receiving element 26a every time the optical axis between the light receiving element 26a and the light emitting element 26b is blocked. In this case, the light receiving element 26a and the light emitting element 26b
Is set at a position deviated from the center of coins C to be dispensed in a line, so that even if a plurality of coins C continuously pass in contact with each other, the light receiving element 26a Outputs pulses corresponding to the number of sheets passed. Since this output is incremented by a counter (not shown) or the like, the number of coins C paid out is counted.

In this case, dust and the like adhering to the coin C and the payout belt 17 are carried along the surface of the guide plate 33 and
4 and may accumulate near the working portion (sensor cover 35) of the light emitting element 26b. In such a case, the cashier operating the POS terminal is the main body case 1
a bottom surface portion 36 of the air supply portion 36 exposed on the left side of FIG.
By pressing a with a finger and injecting air from the tip of the tube 37, dust and the like accumulated near the operating portion (sensor cover 35) of the light emitting element 26b can be blown off and wiped off.

The working portion of the light emitting element 26b is covered with a cup-shaped sensor cover 35 that transmits infrared rays and is electrically insulated. Even if dust carrying dust is floating, the dust does not adhere to the operating portion (sensor cover 35) of the light emitting element 26b.

Further, the tube 37 is branched into six from the middle, and the light emitting element 26b provided for each denomination is provided.
Are disposed in the vicinity of the sensor cover 35 that covers the action portion of
By only pressing once with a finger, the payout sensors 26 of all denominations can be cleaned at the same time.

Next, an automatic change dispensing apparatus according to a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment described above are denoted by the same reference numerals, and description thereof will be omitted. The automatic change dispensing device of the present embodiment is different from the automatic change dispensing device 1 of the first embodiment in the position where the air supply unit 36 is provided.

FIG. 5 is a vertical sectional left side view showing the automatic change dispensing device 50. As shown in FIG. As shown in FIG. 5, the air supply unit 36 of the present embodiment is provided at a position where the bottom surface portion 36 a is pressed against the back surface 30 a of the drawer 30 when the drawer 30 is stored. It expands and contracts in accordance with the storing operation. That is, when the drawer 30 is stored, the bottom surface portion 36 a of the air supply unit 36 is pressed against the back surface 30 a of the drawer 30, and the volume of the air supply unit 36 is temporarily reduced. Is injected from the tube 37.

Therefore, when the cashier stores the drawer 30 opened in response to the operation of the POS terminal, the bottom portion 36 a of the air supply unit 36 is pressed by the drawer 30 and the air is ejected from the tube 37. become.
This allows the cashier to operate the light emitting element 26b (the sensor cover 3) without the need for a cleaning operation.
5) Since dust and the like accumulated near the area can be blown off and wiped off, the load on the cashier can be greatly reduced.

In each embodiment, the light receiving element 26a of the payout sensor 26 is provided above the light emitting element 26b.
Is provided below, but the invention is not limited to this. The light receiving element 26a may be provided below and the light emitting element 26b may be provided above. In that case, the light receiving element 26a is covered with the sensor cover 35 on the upper surface and the periphery.

In each embodiment, the payout sensor 26 is a transmissive optical sensor having the light receiving element 26a and the light emitting element 26b. However, the present invention is not limited to this.
It may be a reflection type.

Further, in each of the embodiments, the tube 37 is branched into six parts from the middle, and the tubes 37 are arranged in the vicinity of the sensor cover 35 covering the light emitting element 26b provided for each denomination. However, the present invention is not limited to this. The function of increasing the number of branches and discriminating a denomination between the coin slot 2 and the coin storage unit 16 where dust may adhere due to contact with the coin C (optical sensor) (For example, the outer diameter check section 9 or the like).

[0049]

According to the first aspect of the present invention, a coin transporter for transporting coins inserted into a coin insertion slot to a coin sorting position, and coins transported to the coin sorting position and sorted are classified by denomination. And a coin dispensing section that conveys the coins in the coin storing section and pays out the coins to a coin payout port, and that transports at least one or more optical sensors for optically detecting the coins. In the automatic change dispensing device provided on the path, by providing air injection means for injecting air toward the operation portion of the optical sensor, when dust or the like is deposited near the operation portion of the optical sensor, By injecting air into the working part of the optical sensor by air injection means, dust and the like deposited near the working part of the optical sensor can be blown off by air, so that the working part of the optical sensor that detects coins It is possible to prevent the adhesion of dust.

According to the second aspect of the present invention, in the automatic change dispensing apparatus according to the first aspect, the air ejecting means reduces the volume by receiving the pressure and discharges the internal air from the discharge port. A supply unit, a restoring unit that restores the pressed air supply unit to a state before the press, and one end is connected to the discharge port of the air supply unit, and the other end faces the working unit of the optical sensor. And the hollow tube arranged at the position where the air supply unit is pressed by a finger to reduce the volume when dust or the like is accumulated near the working part of the optical sensor. By spraying air from the tip of the tube, dust accumulated near the working part of the optical sensor can be blown away and wiped out, so that dust adheres to the working part of the optical sensor that detects coins The simple structure In can be prevented.

According to the third aspect of the present invention, in the automatic change dispensing apparatus according to the second aspect, since the tube is branched into a plurality of portions, the tube only needs to press the air supply portion only once, so that a plurality of tubes are provided. Dust and the like accumulated near the working part of the optical sensor can be blown off at the same time.

According to a fourth aspect of the present invention, in the automatic change dispensing apparatus according to any one of the first to third aspects, the optical sensor has a light-transmitting and electrically insulated sensor cover. With the provision, even if dust or the like charged with static electricity is floating, it is possible to prevent the dust or the like from adhering to the operating portion of the optical sensor.

According to a fifth aspect of the present invention, in the automatic change dispensing apparatus according to any one of the second to fourth aspects, a drawer capable of being freely stored and opened is provided below the coin dispensing section, and the air supply is provided. The portion is provided at a position pressed by the drawer in accordance with the storing operation of the drawer, so that when the drawer is stored, the air supply unit is pressed by the drawer, so that air is ejected from the tube. Since the dust accumulated near the working part of the optical sensor is blown away, for example, when the drawer is opened in response to the operation of the POS terminal, the cashier needs an operation for cleaning the optical sensor. In addition, each time the drawer is stored, the vicinity of the action section of the optical sensor can be cleaned, and the load on the cashier can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is an external perspective view schematically showing an automatic change dispensing apparatus according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the internal structure of the automatic change dispensing device.

FIG. 3 is a perspective view showing a coin storage unit and a coin dispensing unit built in the automatic change dispensing apparatus.

FIG. 4 is a longitudinal left side view thereof.

FIG. 5 is a vertical sectional left side view showing an automatic change dispensing apparatus according to a second embodiment of the present invention.

FIG. 6 is a vertical sectional left side view showing a conventional automatic change dispensing apparatus.

[Explanation of symbols]

 1,50 Automatic change dispensing device 2 Coin slot 4,6,7,8,11 Coin transport unit 9,26 Optical sensor 16 Coin storage unit 28 Coin dispensing unit 29 Coin dispensing port 30 Drawer 35 Sensor cover 36 Air supply unit Air injection means 36b Discharge port 37 Tube, air injection means C coin

Claims (5)

[Claims] 1. A coin transporter for transporting coins inserted into a coin slot to a coin sorting position, a coin storage unit for storing coins transported to the coin sorting position and sorted by denomination, and the coins A coin dispensing unit that conveys the coins in the storage unit and pays out the coins to a coin dispensing port, wherein at least one or more optical sensors for optically detecting the coins are provided on the coin conveying path. An automatic change dispensing device, comprising: air injection means for injecting air toward an operation section of the optical sensor. 2. An air supply unit for reducing the volume by receiving a pressure to discharge the internal air from an outlet, and restoring the pressed air supply unit to a state before the pressing. And a hollow tube, one end of which is connected to the outlet of the air supply unit, and the other end of which is disposed at a position facing the operation unit of the optical sensor. The automatic change dispensing device according to claim 1. 3. The automatic change dispensing device according to claim 2, wherein the tube is branched into a plurality of tubes. 4. The automatic change dispensing device according to claim 1, wherein the optical sensor includes a sensor cover having a light transmitting property and being electrically insulated. 5. A drawer which can be stored and opened freely is provided below the coin payout section, and the air supply section is provided at a position pressed by the drawer in accordance with a storing operation of the drawer. The automatic change dispensing device according to any one of claims 2 to 4.