To transfer a dropping-off transportation object of a return side belt to a head chute without separately providing a driving device.

An upper part of an endless capturing belt 23 becoming a cylindrical shape in which both end edges are superposed in a width direction when external force is not applied is clamped between a return side belt receiving roller 8a and the return side belt 3b in the flat state and a lower part is wound on cylindrical guide rollers 24a, 24b rather at a tail side than the return side belt receiving roller 8a and a flat guide roller 25 in the head chute 6. The flat guide roller 25 is provided with a press roller 28 for flattening the capturing belt 23. After the dropping off transportation object 9 from the return side belt 3b is received on the capturing belt 23 circulated by imparting rotation force by the conveyor belt 3, it is enveloped in the capturing belt 23 becoming the cylindrical shape and is transferred into the head chute 6. It is dropped off and discharged into the head chute 6 when the capturing belt 23 is opened to width direction near the flat guide roller 25.