PURPOSE: To make the directional change of conveying jigs performable in an efficient manner with a simple structure, by installing a conveying belt of a conveying jig and a keeping belt as well as two pulleys on which both these belts are rolled at the specified interval and rotate as together as one body.

CONSTITUTION: A pulley 5 is locked to a shaft 1, while supported with a bearing 2, and constituted of a first pulley 5a on which a conveying belt 3 is rolled and a second pulley 5b on which a keeping belt 4 is rolled. With this constitution, a conveying jig 6 to be returned as emptied is conveyed by the conveying belt 3 driven by the pulley 5. If so, the conveying jig 6 is sandwiched between the pulley and the conveying belt 3 by the keeping belt 4. And, the conveying jig 6 goes round the pulley 5 as being left sandwiched intact and then it is delivered onto another conveying belt. With this constitution, the number of parts items is reduced and its structure can be so simplified, thus assembling and control or the like for a device are all facilitated.