PURPOSE: To prevent deformation of a formed part of a plate and effectively utilize a space of a plant by providing many projections of an elastic body on the supporting surface for supporting a plate of a first, a second and a third conveyors so that an interval between the second and the third conveyors can be adjusted freely.

CONSTITUTION: By adjusting a position of gear boxes provided in both ends of the lower base and the upper base in the forward and the backward directions by synchronizing them suitably, a before/behind interval is adjusted by moving forward and backward the second conveyor 101 and the third conveyor 103. Thereafter, when a suction state of a suction pad is released, a plate W is supported and stored on a belt 95 of the first conveyor 9, and also, both front and rear sides of the plate W are supported by the second and the third conveyors 101, 103. Subsequently, the plate W is supported by a work supporting member 97 of an artificial lawn, a brush, a finger, etc., and stored stably without falling down in the carrying direction under a vertical state.