- Patent JPS4947459

Document Type and Number:

Japanese Patent JPS4947459

Kind Code:

B1

Abstract:

In a copying machine of the type having an endless belt on guide rollers for feeding copy sheets about a transparent printing cylinder, a system at one of the belt-driven guide rollers for detecting the slippage or stoppage of the endless belt, which system comprises a motor having an output shaft with a given rate of rotation which is lower than the rotation rate of the guide roller during normal operation, and two juxtaposed cam plates, one connected through a one-way clutch to the shaft of the guide roller and the other connected through a one-way clutch to the output shaft. The two plates are coupled for rotation together by a pin which projects from one into an arcuate slot in the other. When the roller is turning faster than the motor shaft, the roller clutch engages, causing the two cam plates to be driven in unison at the roller rotation rate by engagement of the pin with one end of the slot while the output shaft clutch is disengaged. If the rotation rate of the guide roller drops below that of the output shaft, relative rotation between the plates causes the pin to engage the opposite end of the slot, thereupon causing the output shaft clutch to engage to drive the plate system, while the roller clutch disengages. The periphery of each cam plate is provided with a recess, which recesses are out of register when the cam plate system is being driven through the guide roller clutch, but which are brought into register by the shifting of the pin in the slot when the output shaft clutch takes over the driving operation. A switch is provided having an actuator, riding on the outer periphery of the rotating cam plate, which drops into the recesses when indexed, giving a signal that indicates the slippage or stoppage of the belt on the roller and which can be used to operate associate components in the machine to deal with the condition.

WO/2020/228091	CONVEYING LINE AND CONVEYING LINE OUT-OF-STEP DETECTION METHOD
JP4784472	Sorting equipment