WORK CONVEYOR DEVICE

PURPOSE:To make a carrier arm compact and change the switching strokes and timing of clamp fingers easily by supplying clamp finger driving force from outside by an inner shaft enclosed in the carrier arm, and switching the clamp fingers by means of cams. CONSTITUTION:When an inner shaft 38 rotatably supported inside the outer shaft of a carrier arm A is rotated, an intermediate gear 64 connected to one end of a link 61 with its other end brought into contact with cams 581, 582 rigidly secured at the inner shaft 38 is rotated. This rotation is transmitted to parallel rack guide bars 551, 552 through a pinion 68 so as to drive clamp fingers 71, 72 to be switched. As this driving force is transmitted from outside the carrier arm A by the inner shaft 38, the measure of the carrier arm A can be made compact, as well as the switching strokes and timing of the clamp fingers 71, 72 can be changed easily only by exchanging the cams 581, 582 provided at the inner shaft 38.