US 11,932,119 B2
Electric trolley
Hiroyuki Uematsu, Osaka (JP); and Hidekatsu Ozeki, Gifu (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Dec. 22, 2021, as Appl. No. 17/559,630.
Application 17/559,630 is a continuation of application No. PCT/JP2020/028822, filed on Jul. 28, 2020.
Claims priority of application No. 2019-143747 (JP), filed on Aug. 5, 2019.
Prior Publication US 2022/0111738 A1, Apr. 14, 2022
Int. Cl. A61G 5/04 (2013.01); B60L 15/20 (2006.01); B60T 7/12 (2006.01)
CPC B60L 15/2009 (2013.01) [B60T 7/12 (2013.01); B60L 2200/24 (2013.01); B60L 2200/30 (2013.01); B60L 2200/34 (2013.01); B60L 2240/12 (2013.01); B60L 2240/647 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An electric trolley that travels by controlling a motor fitted to a driving wheel of the electric trolley using a motor driver of the electric trolley, the electric trolley comprising:
a safety controller that determines whether or not to stop driving of the driving wheel;
a driving commander that outputs, to the motor driver, (i) an operation permission signal for permitting the motor to be operated and (ii) a control signal for controlling an operation of the motor.
an operation blocker that is provided between the driving commander and the motor driver, and blocks the operation permission signal based on an operation blocking signal input from the safety controller; and
a control blocker that is provided between the driving commander and the motor driver, and blocks the control signal based on a control blocking signal input from the safety controller, wherein
when the safety controller determines to stop the driving of the driving wheel, the safety controller outputs the operation blocking signal to the operation blocker to stop input of the operation permission signal to the motor driver and outputs the control blocking signal to the control blocker to stop input of the control signal to the motor driver.