To provide a roller conveyor device of a simple constitution such that only the specified range such as the convergence part and separation part have a high conveying ability without adding any power source.
The roller conveyor device 6 is composed of a bunch BR of belt driving rollers driven by a power transmission belt 22, a bunch CR of chain driving rollers driven by an endless chain 25, and a rotational drive shaft 18 installed along the transport path, wherein the rotational drive shaft 18 is used as a common drive shaft to drive simultaneously the roller bunch BR in the specific range belonging to the roller conveyor device 6 and also the remaining roller bunch CR, which allows simplifying the construction, and it is possible to prevent the object being conveyed from stagnation in the branching part or the convergence part.
Hideo Shimizu
Yuichi Takagi
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