Paper sheet transport device and paper sheet handling device

A paper sheet transport device comprising a transport route on which paper sheets are transported, a transport unit that transports the paper sheets along the transport route, a reading unit that has a reading sensor, a motor unit that has a motor driving the transport unit, and a controller that executes driving control of the motor, wherein:

• the motor unit includes a motor-side temperature sensor that measures a temperature of the motor, and a thermally conductive member positioned between the motor-side temperature sensor and the motor;
• the reading unit includes a reading-side temperature sensor that measures a temperature at the reading unit;
• and
• a controller configured to:
• responsive to the motor-side temperature sensor detecting a second threshold temperature or a higher temperature, alternatively repeat control to stop the motor for a first pre-established number of seconds and drive the motor to transport a first pre-established number of the paper sheets until the motor-side temperature sensor detects a first threshold temperature or a lower temperature,
• responsive to the motor-side temperature sensor detecting a fourth threshold or a higher temperature, alternatively repeat control to stop the motor for a second pre-established number of seconds and drive the motor to transport a second pre-established number of the paper sheets until the motor-side temperature sensor detects a third threshold temperature or a lower temperature,
• responsive to the motor-side temperature sensor detecting a sixth threshold temperature or a higher temperature, executes control to stop the motor until the motor-side temperature sensor detects the fourth threshold temperature or a lower temperature, and
• responsive to a reading-side temperature sensor detecting a second reading-side threshold temperature or higher temperature, executes control to stop the motor until the reading-side temperature sensor detects a first reading-side threshold temperature or a lower temperature;
• and
• wherein the temperatures hold a relationship whereby the first reading-side threshold temperature is less than the second reading-side threshold temperature is less than the first threshold temperature is less than the second threshold temperature is less than the third threshold temperature is less than the fourth threshold temperature is less than the sixth threshold temperature and the times hold a relationship whereby the first pre-established number of seconds is less than the second pre-established number of seconds.

A method of preventing overheating of a motor-driven paper sheet transport device comprising:

• utilizing a motor-side temperature sensor to measure a temperature of the motor;
• positioning a thermally conductive member between the motor-side temperature sensor and the motor;
• utilizing a reading unit including a reading-side temperature sensor to measure a temperature at the reading unit;
• and
• configuring a controller for:
• responsive to the motor-side temperature sensor detecting a second threshold temperature or a higher temperature, alternatively repeating control to stop the motor for a first pre-established number of seconds and driving the motor to transport a first pre-established number of the paper sheets until the motor-side temperature sensor detects a first threshold temperature or a lower temperature,
• responsive to the motor-side temperature sensor detecting a fourth threshold or a higher temperature, alternatively repeating control to stop the motor for a second pre-established number of seconds and driving the motor to transport a second pre-established number of the paper sheets until the motor-side temperature sensor detects a third threshold temperature or a lower temperature,
• responsive to the motor-side temperature sensor detecting a sixth threshold temperature or a higher temperature, executing control to stop the motor until the motor-side temperature sensor detects the fourth threshold temperature or a lower temperature, and
• responsive to a reading-side temperature sensor detecting a second reading-side threshold temperature or higher temperature, executing control to stop the motor until the reading-side temperature sensor detects a first reading-side threshold temperature or a lower temperature;
• and
• wherein the temperatures hold a relationship whereby the first reading-side threshold temperature is less than the second reading-side threshold temperature is less than the first threshold temperature is less than the second threshold temperature is less than the third threshold temperature is less than the fourth threshold temperature is less than the sixth threshold temperature and the times hold a relationship whereby the first pre-established number of seconds is less than the second pre-established number of seconds.