| 摘要 |
PROBLEM TO BE SOLVED: To certainly remove a residual object adhered to the surface of a belt after conveyance belt without using a power force. SOLUTION: A collision member 30 is vertically movably supported on a back surface of a return belt 4q. A driving mechanism 40 of the collision member 30 has a rotation disc 41 of which an outer periphery surface is brought into pressure-contact with the back surface of the return belt 4q and a support mechanism 42 for supporting the rotation disc 41 such that the rotation disc 41 is rotated by a friction force between the outer periphery surface of the rotation disc 41 and the back surface of the belt 4. An arm 44 integrally rotated with the rotation disc 41 is provided on the rotation disc 41. An engagement portion 34 for dropping off the collision member 30 after raising up it is provided on the collision member 30 by engaging with and disengaging from the arm 44 at the time of a raising of the arm 44.
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