Paper bill conveying device and paper bill handling device

Abstract

The present invention prevents the occurrence of anomalous events due to the generation of motor heat. This paper bill conveying device 1 includes a reading unit 20 that has a reading side temperature sensor 29 and that reads a feature quantity of a paper bill P, a conveying motor 110A that drives a pair of conveying rollers 14, and a control means 200 that drives and controls the conveying motor. The paper bill conveying device includes a motor-side temperature sensor 140 that measures the temperature of the conveying motor, and a heat conduction member 141 filling the space between the motor-side temperature sensor and the conveying motor. The control means stops the motor for x1 seconds each time one paper bill is conveyed until the motor temperature drops to ta1 or therebelow when the motor temperature reaches ta2 or above, stops the motor for x2 seconds each time one paper bill is conveyed until the motor temperature drops to ta3 or therebelow when the motor temperature reaches ta4 or above, stops the motor until the temperature drops to ta4 or therebelow when the motor temperature reaches ta6 or greater, and stops the motor until the read sensor temperature drops to tb1 or therebelow when the read sensor temperature reaches tb2 or above (tb1 < tb2 < ta1 < ta2 < ta3 < ta4 < ta6, and x1 < x2).

Description

Paper sheet transport device and paper sheet handling device

[0001] The present invention relates to a paper sheet transport device that transports paper sheets such as banknotes, and a paper sheet handling device equipped with the paper sheet transport device.

[0002] Conventionally, banknote handling devices such as banknote deposit machines, various vending machines, and currency exchange machines are provided with a banknote transport device that transports banknotes (one example of paper sheets) in a storing direction or a dispensing direction. In recent years, banknote transport devices have become smaller and faster, and various heat countermeasures have been devised.

[0003] Patent Document 1 describes a banknote storage device that can accurately process banknotes regardless of the temperature of the installation environment. In Patent Document 1, the amount of heat generated by the motor is controlled by changing the amount of current or resistance value flowing through the motor without driving the motor when the motor is stopped, thereby responding to changes in environmental temperature. That is, when the environmental temperature is low, the amount of current or resistance value flowing through the motor is increased to increase the amount of heat generated by the motor and prevent operational delays caused by temperature drops. Conversely, when the environmental temperature is high, the amount of current or resistance value flowing through the motor is decreased to reduce the amount of heat generated by the motor and prevent motor overheating. Patent Document 1 achieves a banknote storage device that has high operational reliability even when the device is made smaller and faster.

[0004] JP 2000-67302 A

[0005] As paper sheet transport devices become smaller, the space available for mounting each component becomes limited. As a result, heat-sensitive components may have to be placed close to heat-generating components such as motors. Furthermore, as paper sheet processing speeds increase, motors are more likely to become hot. Furthermore, as the capacity of a paper sheet storage unit located downstream of a paper sheet transport device increases, the motor may operate continuously for long periods of time, making it more likely to become hot.

[0006] In order to reduce the size of paper sheet transport devices, increase the processing speed, and increase the capacity of paper sheet storage units, it is necessary to take measures to prevent problems caused by heat generated by motors.

[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a novel paper sheet transport device that prevents problems caused by heat generated by a motor.

[0008] In order to solve the above-mentioned problems, the present invention provides a paper sheet transport device including a transport path along which paper sheets are transported, transport means for transporting the paper sheets along the transport path, a reading unit having a reading sensor for reading feature quantities of the paper sheets transported along the transport path, a motor unit having a motor for driving the transport means, and control means for driving and controlling the motor, wherein the motor unit has a motor-side temperature sensor for measuring the temperature of the motor, and a heat-conductive member filled between the motor-side temperature sensor and the motor, and the reading unit has a reading-side temperature sensor for measuring the temperature inside the reading unit, and the control means controls the motor-side temperature sensor to measure a temperature t when the motor-side temperature sensor detects a temperature t a2 or higher. a1 or less, alternately repeating control to stop the motor for x1 seconds and control to drive the motor to transport n1 sheets, when the motor-side temperature sensor detects a temperature of ta4 or more, alternately repeating control to stop the motor for x2 seconds and control to drive the motor to transport n2 sheets until the motor-side temperature sensor detects a temperature of ta3 or less, when the motor-side temperature sensor detects a temperature of ta6 or more, control to stop the motor until the motor-side temperature sensor detects a temperature of ta4 or less, when the reading-side temperature sensor detects a temperature of tb2 or more, where temperatures tb1<tb2<ta1<ta2<ta3<ta4<ta6 and time x1<x2.

[0009] According to the present invention, it is possible to prevent problems caused by heat generation from the motor.

[0010] 1 is a longitudinal sectional view showing the internal configuration of a banknote transport device according to an embodiment of the present invention; FIG. 2 is a transverse sectional view showing the positional relationship between a motor and a reading unit; FIG. 3 is a side view of a transport motor unit; FIG. 4 is a perspective view of a transport motor unit; FIG. 5 is a block diagram of a banknote transport device showing the configuration related to motor control; FIG. 6 is a diagram showing an example of a control method in the form of a table; and FIG. 7 is a graph showing an example of temperature change of the motor when the control shown in FIG. 6 is executed.

[0011] The present invention will be described in detail below using the embodiments shown in the drawings. However, unless otherwise specified, the components, types, combinations, shapes, relative positions, etc. described in these embodiments are merely illustrative examples and do not limit the scope of the present invention.

[0012] Hereinafter, embodiments of the present invention will be described in detail. [First Embodiment] Fig. 1 is a vertical cross-sectional view showing the overall internal configuration of a banknote transport device according to one embodiment of the present invention. Fig. 2 is a horizontal cross-sectional view showing the positional relationship between a motor and a reading unit. Note that the vertical cross-sectional view is a view of the banknote transport device cut in a direction along the transport path, and the horizontal cross-sectional view is a view of the banknote transport device cut in a direction perpendicular to the transport path. Fig. 2 is a view of the interior of the banknote transport device observed from the front (front) side, and the code wheel 121 is not shown.

[0013] The banknote transport device (paper sheet transport device) 1 comprises a banknote inlet (paper sheet inlet) 12 that receives banknotes (paper sheets) P ​​from the outside, a transport path 10 along which the banknotes received inside are transported, a plurality of transport roller pairs 14 (transport means) that are sequentially arranged at appropriate positions on the transport path 10 and transport the banknotes along the transport path 10, reading units 20 (lower reading unit 20A, upper reading unit 20B) that are arranged at appropriate positions within the transport path 10 and have reading sensors that read the characteristics of the banknotes transported along the transport path 10, a transport motor unit 100A (motor unit 100) that has transport motors 110A (motors 110) that drive each transport roller pair 14, and control means 200 that drive and control the transport motors 110A.

[0014] The transport motor unit 100A includes a transport motor-side temperature sensor 140A (motor-side temperature sensor 140) that measures the surface temperature of the transport motor 110A, and a heat-conducting member 141 filled between the motor-side temperature sensor 140 and the motor 110. The lower reading unit 20A includes a lower reading-side temperature sensor 29A (reading-side temperature sensor 29) that detects the temperature inside the lower reading unit. The upper reading unit 20B includes an upper reading-side temperature sensor 29B (reading-side temperature sensor 29) that detects the temperature inside the upper reading unit. The control means 200 controls the motor 110 to intermittently drive the motor 110 when the motor-side temperature sensor 140 detects a predetermined high temperature (temperatures ta2 and ta4), and to stop the acceptance of banknotes P when the motor-side temperature sensor 140 detects an even higher temperature (temperature ta6). Furthermore, the control means 200 controls the motor 110 to stop the acceptance of banknotes P when the reading-side temperature sensor 29 detects a predetermined high temperature (temperature tb2).

[0015] <Banknote transport device> The internal configuration of the banknote transport device will be described with reference to Fig. 1. In this example, banknotes are shown as an example of paper sheets, but this device can also be applied to transport paper sheets other than banknotes, such as securities, coupons, tickets, etc.

[0016] The banknote transport device 1 is attached to and used in a banknote handling device main body (paper handling device main body) such as a banknote deposit machine, various automatic vending machines, currency exchange machines, etc. (not shown), and the banknotes P received by the banknote transport device 1 are identified for authenticity and denomination based on information read by a reading sensor, and then stored one by one in a cash box (banknote storage section) within the banknote handling device main body. The banknote handling device (paper handling device) is composed of the banknote handling device main body and the banknote transport device 1.

[0017] The banknote transport device 1 comprises a lower unit 3 and an upper unit 4 supported so as to be freely opened and closed relative to the lower unit 3, and when each unit shown in Figure 1 is in a closed state, a banknote transport path (transport path) 10 is formed between the opposing surfaces of each unit.

[0018] At one end of the transport path 10, there is provided a banknote inlet 12 for introducing banknotes P into the banknote transport device 1, and further inside than the banknote inlet 12, there are arranged along the transport path 10 a plurality of transport roller pairs 14, 14..., a reading unit 20 that reads information from the banknotes to identify the denomination and authenticity of the banknotes, and a banknote outlet (paper sheet outlet) 16 that discharges banknotes to a banknote storage vault (paper sheet storage vault, external device) 300. Furthermore, at appropriate positions within the banknote transport device 1, there are arranged a transport motor unit 100A including a transport motor 110A that drives each transport roller pair 14 for transporting banknotes, and control means (CPU, MPU, ROM, RAM) 200 that determines the denomination and authenticity of the banknote based on the identification information from the reading unit 20, and controls the transport motor 110A and other controlled objects based on banknote detection signals from each paper passage sensor (not shown).

[0019] The banknote transport device 1 includes an external output gear 150 that outputs driving force to the outside, and a storage motor unit 100B (motor unit 100) that includes a storage motor 110B (motor 110, second motor) that drives the external output gear 150. The storage motor 110B is drive-controlled by control means 200.

[0020] Each conveying roller pair 14 is composed of a drive roller arranged on the lower unit 3 side and a driven roller arranged on the upper unit 4 side, and is configured to nip both sides of the banknotes to convey them.

[0021] The banknote transport device 1 comprises a lower reading unit 20A located below the transport path 10 and an upper reading unit 20B located above the transport path 10. The lower reading unit 20A reads information from the lower side (one side) of a banknote, and the upper reading unit 20B reads information from the upper side (other side) of the banknote. The reading unit 20 is, for example, a contact image sensor (CIS) that reads the optical pattern of a banknote. The reading unit 20 comprises a sensor control board 27 on which a light receiving element 25 is mounted. A reading-side temperature sensor 29 that detects the temperature inside the reading unit is mounted on the sensor control board 27 of the reading unit 20.

[0022] As the reading unit, a magnetic sensor that recognizes the magnetic pattern (magnetic feature) of a banknote can be used in addition to a sensor that recognizes the optical pattern (optical feature) of the banknote.

[0023] A banknote storage vault 300 having a banknote storage section (paper sheet storage section) therein (not shown) is connected to the banknote transport device 1. The banknote outlet 16 communicates with a banknote receiving port (paper sheet receiving port) 301 of the banknote storage vault 300. The banknote storage vault 300 stores banknotes received from the banknote transport device 1 via the banknote receiving port 301 in the banknote storage section. The banknote storage vault 300 includes a driven gear 303 that meshes with the external output gear 150 to obtain driving force from the storage motor 110B. By obtaining driving force from the outside, the banknote storage vault 300 operates various gears and the like provided inside the banknote storage vault 300 to store banknotes in the banknote storage section.

[0024] The control means 200 is composed of a unit equipped with a CPU (Central Processing Unit), ROM (Read Only Memory), and RAM (Random Access Memory), or an MPU (Micro Processing Unit) that incorporates these and other necessary modules into a single chip, etc. The CPU reads out a program from the ROM, expands it into the RAM, and executes it, thereby realizing various functions and means.

[0025] The above-described configuration of the banknote transport device 1 is merely an example, and various modifications are possible. For example, various changes and component selections are possible, such as the number of motors used, the arrangement of the roller pairs and transport belt, and the type of reading unit.

[0026] <Motor unit> Fig. 3 is a side view of the motor unit. Fig. 4 is a perspective view of the motor unit. The transport motor unit 100A and the storage motor unit 100B have the same basic configuration, although the arrangement of some of the components differ. The following description will be given without making any particular distinction between the transport motor unit 100A and the storage motor unit 100B.

[0027] The motor unit 100 comprises a motor 110, a pinion gear 115 fixed to one end 113a of a motor shaft 113 of the motor 110, an encoder unit 120 attached to the other end of the motor 110 to detect the rotation of the motor shaft 113, and a motor-side temperature sensor 140 (a transport motor-side temperature sensor 140A, a storage motor-side temperature sensor 140B) to measure the temperature of the motor 110.

[0028] <<Motor and Pinion Gear>> The motor 110 includes a generally cylindrical housing 111 that houses a rotor and a stator and has closed end faces, and a motor shaft 113 that rotates integrally with the rotor and has both axial ends protruding from axial end faces 111a, 111b of the housing 111. As an example, the housing 111 includes a cylindrical motor case with a closed bottom, one axial end face 111a of which is closed and the other axial end face 111b of which is open, and an end bell that closes the other end face of the motor case. The housing 111 is conductive.

[0029] A pinion gear 115 is fixed to one axial end 113a of the motor shaft 113 so as to be coaxial with and rotate integrally with the motor shaft 113. The pinion gear 115 is made of resin and transmits driving force to a downstream gear, roller, belt, or the like.

[0030] <<Encoder Unit>> The encoder unit 120 includes a code wheel 121, an optical element (rotation detection means) 129 that detects the teeth 125 (slits 127) of the code wheel 121, processing means 131 that processes the electrical signal output by the optical element 129, and a motor board 133 on which the optical element 129 and processing means 131 are mounted.

[0031] The code wheel 121 is fixed to the other axial end 113b of the motor shaft 113 and rotates coaxially and integrally with the motor shaft 113. The code wheel 121 includes a disk portion 123 fixed to the motor shaft 113, and a plurality of teeth 125 (slits 127) that protrude from the outer periphery of the disk portion 123 along the axial direction of the motor shaft 113 toward the motor 110 (toward the motor board 133) and are arranged at predetermined intervals along the circumferential direction of the disk portion 123. The teeth 125 and the slits 127 function as a scale that is read by an optical element 129 to detect the rotation of the motor 110.

[0032] The motor board 133 is disposed between the code wheel 121 and the motor 110. The other axial end 113b of the motor shaft 113 passes through the surface of the motor board 133, and one surface 133a faces the other axial end surface 111b of the housing 111 at a predetermined distance. The code wheel 121 is fixed to the other end 113b of the motor shaft 113, which protrudes from the other surface 133b of the motor board 133.

[0033] The motor board 133 is disposed parallel to the code wheel 121. An optical element 129 and processing means 131 are mounted on the other surface 133b of the motor board 133. The optical element 129 is a photointerrupter including a light-emitting element and a light-receiving element arranged to sandwich each tooth 125 (each slit 127) of the rotating code wheel 121 between them. The processing means 131 includes at least an output terminal that outputs an electrical signal to the outside. The processing means 131 may also include an A / D converter, a signal processing IC, etc. The gap between the motor board 133 and the housing 111 prevents short-circuiting of various electrical components via the housing 111 and solder, etc. exposed on the one surface 133a of the motor board 133.

[0034] By bending the tooth portion 125 of the code wheel from the disk portion 123 (by bending it at a right angle), the motor unit 100 can be easily assembled. By assembling the motor 110 and the encoder unit 120 into a unit (assembly), the maintenance of the parts around the motor is improved. In addition, the motor unit 100 can be configured compactly.

[0035] <<Motor-side temperature sensor>> A motor-side temperature sensor 140 is mounted on one surface 133a of the motor board 133. The motor-side temperature sensor 140 is, for example, a packaged temperature sensor IC. Because the motor-side temperature sensor 140 is disposed in the gap between the motor board 133 and the housing 111, it does not result in an increase in size of the motor unit 100 or the banknote transport device 1 equipped with it.

[0036] A heat conducting member 141 is disposed between the motor-side temperature sensor 140 and the other axial end face 111b of the motor 110. The heat conducting member 141 is in close contact with both the motor 110 and the motor-side temperature sensor 140. The heat conducting member 141 transfers heat from the housing 111 to the motor-side temperature sensor 140. The motor-side temperature sensor 140 measures the temperature of the outer surface of the motor 110 via the heat conducting member 141.

[0037] The heat conducting member 141 preferably covers the entire surface of the motor-side temperature sensor 140 that faces the motor 110. The heat conducting member 141 is set to a size equal to or larger than the surface of the motor-side temperature sensor 140. An example of the heat conducting member 141 is a flexible or pliable heat conducting sheet, but is not limited to this.

[0038] <<Motor Unit Arrangement>> The motor units 100A and 100B are located below the conveying path 10. The entire motor shaft 113 overlaps the conveying path 10 in the vertical direction. The motor units 100A and 100B are located below the reading units 20A and 20B. The motor units 100A and 100B are positioned so as to overlap at least a portion of the reading units 20A and 20B in the vertical direction.

[0039] As shown in Fig. 1, the motor units 100A and 100B are arranged so that the motor shaft 113 extends in the longitudinal direction of the transport path 10 (the direction in which banknotes are transported). Also, as shown in Fig. 2, the motor units 100A and 100B are arranged side by side in the width direction intersecting (orthogonal to) the longitudinal direction of the transport path 10. A portion of the motor shaft 113, which becomes the hottest in the motor 110, is positioned so as to overlap the reading units 20A and 20B in the vertical direction. For this reason, the lower reading unit 20A in particular is susceptible to heating due to the heat rising from the two motors 110A and 110B.

[0040] <Functional Configuration> Fig. 5 is a block diagram of a banknote transport device showing the configuration related to motor control. Motor-side temperature sensors 140A, 140B and reader-side temperature sensors 29A, 29B are connected to the input terminals of the control means 200. A transport motor 110A and a storage motor 110B are connected to the output terminals of the control means 200. The control means 200 limits the drive time of the transport motor 110A and the storage motor 110B according to the temperatures of each part detected by the temperature sensors 140, 29.

[0041] <<Control Example>> Fig. 6 is a diagram showing an example of a control method in the form of a table. As shown in control (1) in the table, when the motor-side temperature sensor 140 detects a temperature of ta2 or higher, the control means 200 alternately repeats control to stop the motor 110 for x1 seconds and control to drive the motor 110 to transport one banknote (n1 banknotes) until the motor-side temperature sensor 140 detects a temperature of ta1 or lower. As shown in control (2) in the table, when the motor-side temperature sensor 140 detects a temperature of ta4 or higher, the control means 200 alternately repeats control to stop the motor 110 for x2 seconds and control to drive the motor 110 to transport one banknote (n2 banknotes) until the motor-side temperature sensor 140 detects a temperature of ta3 or lower.

[0042] As shown in control (3) in the table, when the motor-side temperature sensor 140 detects a temperature of ta6 or higher, the control unit 200 controls the motor 110 to stop until the motor-side temperature sensor 140 detects a temperature of ta4 or lower. As shown in control (4) in the table, when the reading-side temperature sensor 29 detects a temperature of tb2 or higher, the control unit 200 controls the motor 110 to stop until the reading-side temperature sensor 29 detects a temperature of tb1 or lower. However, temperatures tb1<tb2<ta1<ta2<ta3<ta4<ta6, time x1<x2, and number of sheets n1≧n2.

[0043] Here, the set temperatures ta1 to ta6 are set so as to protect the pinion gear 115. For example, temperature ta2 is set so that the pinion gear 115 does not exceed its normal heat resistance temperature. Temperature ta4 is set so that the pinion gear does not exceed its maximum operating temperature. Temperature ta6 is set so that the pinion gear does not exceed its softening temperature. However, it is difficult to directly detect the temperature of the pinion gear 115 or the motor shaft 113. For this reason, the set temperatures ta1 to ta6 are set based on the correlation between the surface temperature of the motor 110 and the temperature of the pinion gear 115. Furthermore, the set temperature tb2 is set so as to protect the reading unit 20. Temperature tb2 is set so that the reading unit 20 does not exceed the upper limit of the allowable operating temperature.

[0044] 7(a) and (b) are graphs showing examples of motor temperature changes when the control shown in Fig. 6 is executed. (a) shows an example when control (1) and control (2) are executed, and (b) shows an example when only control (1) is executed. P1 to P6 in Fig. 7(a) and Q1 to Q9 in Fig. 7(b) indicate the number of sheets passed.

[0045] In FIG. 7A, the motor temperature rises sharply up to the number of sheets passed P1, at which point neither control is performed. When the motor-side temperature sensor detects temperature ta2, control (1) is executed. Even when control (1) is executed, the motor temperature does not fall below temperature ta1, so control (1) is repeatedly executed. As control (1) is executed, the motor temperature fluctuates slightly up and down, continuing to rise gradually. When the motor-side temperature sensor detects temperature ta4, control (2) is executed. As control (2) is executed, the motor temperature falls below temperature ta3, so control (1) is executed. In this way, by repeatedly executing controls (1) and (2), the motor temperature fluctuates between temperatures ta2 and ta4, and remains below temperature ta6.

[0046] In FIG. 7B, the motor temperature rises sharply until the number of sheets passed reaches Q1, at which point no control is performed. When the motor-side temperature sensor detects temperature ta2, control (1) is executed. Because execution of control (1) causes the motor temperature to fall below temperature ta1, control (1) is released. After control (1) is released, control (1) is executed again when the motor-side temperature sensor detects temperature ta2. In this way, the motor temperature rises and falls as control (1) is repeatedly executed and not executed. In this example, the motor temperature remains below temperature ta6 even when control (2) is not executed.

[0047] [Summary of Embodiments, Actions, and Effects of the Present Invention] <First Embodiment> A paper sheet transport device (banknote transport device 1) according to this embodiment includes a transport path 10 along which paper sheets (banknotes P) are transported, transport means (a pair of transport rollers 14) for transporting paper sheets along the transport path, a reading unit 20 having a reading sensor (a light-receiving element 25) for reading feature quantities of paper sheets transported along the transport path, a motor unit (transport motor unit 100A) having a motor (transport motor 110A) for driving the transport means, and control means 200 for driving and controlling the motor. The motor unit includes a motor-side temperature sensor 140 for measuring the temperature of the motor, and a heat-conducting member 141 filled between the motor-side temperature sensor and the motor. The reading unit includes a reading-side temperature sensor 29 for measuring the temperature within the reading unit.

[0048] When the motor-side temperature sensor detects a temperature of ta2 or higher, the control means alternately repeats control to stop the motor for x1 seconds and control to drive the motor to transport n1 sheets (1 sheet) until the motor-side temperature sensor detects a temperature of ta1 or lower. When the motor-side temperature sensor detects a temperature of ta4 or higher, the control means alternately repeats control to stop the motor for x2 seconds and control to drive the motor to transport n2 sheets until the motor-side temperature sensor detects a temperature of ta3 or lower. When the motor-side temperature sensor detects a temperature of ta6 or higher, the control means controls the motor to stop until the motor-side temperature sensor detects a temperature of ta4 or lower. When the reader-side temperature sensor detects a temperature of tb2 or higher, the control means controls the motor to stop until the reader-side temperature sensor detects a temperature of tb1 or lower. However, the temperatures are tb1<tb2<ta1<ta2<ta3<ta4<ta6, and the times are x1<x2.

[0049] According to this aspect, when the motor reaches a predetermined high temperature, the operating time of the motor is limited to reduce the heat generated by the motor, thereby making it possible to prevent problems caused by heat generated by the motor.

[0050] <Second embodiment> In a paper sheet transport device (banknote transport device 1) according to this aspect, a motor (transport motor 110A) includes a housing 111 that accommodates a rotor, and a motor shaft 113 that rotates integrally with the rotor and has both axial ends 113a, 113b protruding from axial end faces 111a, 111b of the housing. The motor unit (transport motor unit 100A) includes a motor board 133 that has the other axial end 113b of the motor shaft 113 penetrating within a plane and one face 133a facing the other axial end face 111b of the housing 111 at a predetermined interval, a code wheel 121 that is fixed to the other end 113b of the motor shaft that protrudes toward the other face 133b of the motor board and has a scale (tooth portion 125, slits 127) formed along the circumferential direction, and a rotation detection means (optical element 129) that is mounted on the other face of the motor board and detects the scale of the code wheel. The motor-side temperature sensor is characterized by being mounted on one side of the motor board.

[0051] The code wheel, rotation detection means, and motor board constitute an encoder unit. The motor board is used as the mounting location for the motor-side temperature sensor. A gap is provided between the motor board and the housing to prevent short-circuiting of various electrical components through the housing. The motor-side temperature sensor is, for example, a temperature sensor IC, and is placed in the gap between the motor board and the housing. A thermally conductive member 141 is filled in the gap between the motor-side temperature sensor and the housing, and the motor-side temperature sensor detects the motor temperature via the thermally conductive member.

[0052] According to this aspect, the motor, encoder unit, and temperature sensor are assembled, which makes the motor unit easy to maintain and compact. The motor-side temperature sensor is located in the gap between the motor board and the housing, utilizing the motor board, so the device does not become larger.

[0053] <Third embodiment> In the paper sheet transport device (banknote transport device 1) according to this embodiment, the motor (transport motor 110A) is arranged below the reading unit 20 in a position where it overlaps with at least a part of the reading unit 20 in the vertical direction.

[0054] When the reading unit becomes too hot, problems such as distortion of the read image may occur. In this aspect, the reading unit is disposed above the motor, which is a heat-generating component, and is in a position where it is susceptible to the effects of a rise in the motor's temperature. According to this aspect, when the motor reaches a predetermined high temperature, the operating time of the motor is limited to reduce heat generation from the motor, or the motor is stopped to prevent heat generation, thereby preventing problems caused by overheating of the reading unit.

[0055] <Fourth embodiment> The paper sheet transport device (banknote transport device 1) according to this embodiment is characterized in that it includes a second motor (storage motor 110B) that is arranged adjacent to the motor (transport motor 110A) below the reading unit 20 and outputs driving force to an external device (banknote storage vault 300), and the second motor is positioned so as to overlap at least a portion of the reading unit in the vertical direction.

[0056] The second motor functions as a drive source when, for example, a non-powered banknote storage vault performs a banknote storage operation. The reading unit is located above the two motors, and is in a position where it is susceptible to the effects of temperature increases from both motors. According to this aspect, when the motors reach a predetermined high temperature, the operating time of the motors is limited to reduce heat generation from the motors, or the motors are stopped to prevent heat generation, thereby preventing problems caused by overheating of the reading unit.

[0057] <Fifth embodiment> In the paper sheet transport device (banknote transport device 1) according to this aspect, the code wheel 121 includes a disk portion 123 arranged parallel to the motor board 133, and a plurality of teeth 125 that protrude from the outer periphery of the disk portion toward the motor board along the axial direction of the motor shaft 113 and are arranged at predetermined intervals along the circumferential direction of the disk portion. The rotation detection means (optical element 129) is a photointerrupter including a light-emitting element and a light-receiving element that are arranged to sandwich each tooth of the rotating code wheel in sequence therebetween.

[0058] The motor unit can be easily assembled by bending the tooth portion of the code wheel at a right angle to the disk portion. Combining the motor and encoder unit into a single unit (assembly) improves the ease of maintenance of the parts around the motor. The motor unit can also be configured compactly.

[0059] <Sixth embodiment> In the paper sheet transport device (banknote transport device 1) according to this embodiment, the motor (transport motor 110A) includes a housing 111 that accommodates a rotor and a motor shaft 113 that rotates integrally with the rotor and has both axial ends 113a, 113b protruding from the axial end faces 111a, 111b of the housing. A resin pinion gear 115 that transmits driving force to the transport means (transport roller pair 14) is fixed to one axial end 113a of the motor shaft. Temperature ta2 is set so that the pinion gear does not exceed its normal heat-resistant temperature. Temperature ta4 is set so that the pinion gear does not exceed its maximum operating temperature. Temperature ta6 is set so that the pinion gear does not exceed its softening temperature. Temperature tb2 is set so that the temperature does not exceed the upper limit of the allowable operating temperature of the reading unit 20.

[0060] A resin pinion gear may soften at high temperatures and become unable to transmit driving force. Temperatures ta2, ta4, and ta6 are set so as to protect the pinion gear. This aspect can prevent problems such as the pinion gear softening and spinning freely. A reading unit may cause problems such as distorted read images at high temperatures. Temperature tb2 is set so as to protect the reading unit. This aspect can prevent problems such as distorted read images, making it impossible to properly identify transported paper sheets.

[0061] Seventh Embodiment This embodiment is a paper sheet handling device characterized by including a paper sheet transport device. The paper sheet handling device according to this embodiment enjoys the effects of the paper sheet transport device (banknote transport device 1).

[0062] P...banknote (paper sheet), 1...banknote transport device (paper sheet transport device), 3...lower unit, 4...upper unit, 10...transport path, 12...banknote inlet (paper sheet inlet), 14...transport roller pair (transport means), 16...banknote outlet (paper sheet outlet), 20...reading unit, 20A...lower reading unit, 20B...upper reading unit, 25...light receiving element (reading sensor), 27...sensor control board, 29...reading side temperature sensor, 29A...lower reading side temperature sensor, 29B...upper reading side temperature sensor, 100...motor unit, 100A...transport motor unit, 100B...storage motor unit, 110...motor, 110A...transport motor, 110B...storage motor (second motor), 111...housing, 111a ...One end surface, 111b...other end surface, 113...motor shaft, 113a...one end, 113b...other end, 115...pinion gear, 120...encoder unit, 121...code wheel, 123...disk portion, 125...tooth portion (scale), 127...slit (scale), 129...optical element (rotation detection means), 131...processing means, 133...motor board, 133a...one surface, 133b...other surface, 140...motor side temperature sensor, 140A...transport motor side temperature sensor, 140B...storage motor side temperature sensor, 141...heat conduction member, 150...external output gear, 200...control means, 300...banknote storage vault (paper sheet storage vault, external device), 301...banknote receiving slot (paper sheet receiving slot), 303...driven gear

Claims

1. A paper sheet transport device comprising: a transport path along which paper sheets are transported; transport means for transporting the paper sheets along the transport path; a reading unit having a reading sensor for reading feature quantities of the paper sheets transported along the transport path; a motor unit having a motor for driving the transport means; and control means for driving and controlling the motor, wherein the motor unit has a motor-side temperature sensor for measuring the temperature of the motor, and a heat-conducting member filled between the motor-side temperature sensor and the motor, and the reading unit has a reading-side temperature sensor for measuring the temperature inside the reading unit, and the control means alternately repeats, when the motor-side temperature sensor detects a temperature of ta2 or higher, control to stop the motor for x1 seconds and control to drive the motor to transport n1 sheets of the paper sheets until the motor-side temperature sensor detects a temperature of ta1 or lower, a control unit for alternately repeating, when the motor-side temperature sensor detects a temperature of ta4 or higher, a control for stopping the motor for x2 seconds until the motor-side temperature sensor detects a temperature of ta3 or lower and a control for driving the motor to transport n2 sheets, when the motor-side temperature sensor detects a temperature of ta6 or higher, a control for stopping the motor until the motor-side temperature sensor detects a temperature of ta4 or lower, and when the reader-side temperature sensor detects a temperature of tb2 or higher, a control for stopping the motor until the reader-side temperature sensor detects a temperature of tb1 or lower, where temperatures tb1<tb2<ta1<ta2<ta3<ta4<ta6 and time x1<x2.

2. The paper sheet transport device described in claim 1, wherein the motor comprises a housing that accommodates a rotor, and a motor shaft that rotates integrally with the rotor and has both axial ends protruding from each axial end face of the housing, and the motor unit comprises a motor board that has the other axial end of the motor shaft penetrating within a surface and one face that faces the other axial end face of the housing at a predetermined distance, a code wheel that is fixed to the other end of the motor shaft that protrudes from the other face of the motor board and has a scale formed along the circumferential direction, and rotation detection means that is mounted on the other face of the motor board and detects the scale of the code wheel, and the motor-side temperature sensor is mounted on one face of the motor board.

3. The paper sheet transport device according to claim 2, wherein the motor is disposed below the reading unit in a position where it overlaps at least a portion of the reading unit in the vertical direction.

4. A paper sheet transport device as described in claim 3, characterized in that it is provided with a second motor arranged adjacent to the motor below the reading unit and outputs driving force to an external device, and the second motor is positioned so as to overlap at least a portion of the reading unit in the vertical direction.

5. The paper sheet transport device described in claim 2, characterized in that the code wheel comprises a disk portion arranged parallel to the motor board, and a plurality of teeth that protrude from the outer periphery of the disk portion along the axial direction of the motor shaft toward the motor board and are arranged at predetermined intervals along the circumferential direction of the disk portion, and the rotation detection means is a photointerrupter that includes a light-emitting element and a light-receiving element that are arranged to sandwich each of the teeth of the rotating code wheel in sequence between them.

6. The paper sheet transport device described in claim 1, characterized in that the motor comprises a housing that accommodates a rotor and a motor shaft that rotates integrally with the rotor and has both axial ends protruding from each axial end face of the housing, a resin pinion gear that transmits driving force to the transport means is fixed to one axial end of the motor shaft, the temperature ta2 is set so that the pinion gear does not exceed its normal heat resistance temperature, the temperature ta4 is set so that the pinion gear does not exceed its maximum operating temperature, the temperature ta6 is set so that the pinion gear does not exceed its softening temperature, and the temperature tb2 is set so that it does not exceed the upper limit of the allowable operating temperature of the reading unit.

7. A paper sheet handling device comprising the paper sheet transport device according to any one of claims 1 to 6.

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