Abstract: A plate circulator includes a plurality of plates, chaining means forming a circular body by connecting the plates in a loop, an engagement groove provided to surfaces of each plate in the circular body, a guide member having a receiving groove, a frame to which a guide member is fixed so that the receiving groove faces the engagement groove, a plurality of balls disposed between the plates and the guide members so as to be brought into contact with the engagement groove and the receiving groove and support the circular body, a circulation groove for rotating and circulating the plurality of balls, and a power transmitting device for circulating the circular body. Therefore, the arrangement can be made simple, the plane formed by the plates can be made high accurate and the apparatus can be made small at the same time.

Abstract: A laser head device including a nozzle supporting shaft (11) which is formed in the shape of a pipe through which laser beams (LB) pass, characterized in that the shaft is vertically movably supported in a frame of a laser processing apparatus and is rotatable about its axis so that it acts both as a protecting pipe for the laser beams (LB) and as a rotary shaft. The object is to provide a laser head device which is simple, compact and lightweight in comparison with conventional ones.

Abstract: A device for transferring materials and product with respect to a worktable (13) of a processing machine (1), including stackers (5R, 5L) provided with a plurality of pallet shelves (3) to and from which material and product pallets are passed and discharged, and a pallet carrying elevator (75) disposed in a vertically movable manner with respect to the stackers, for supporting and moving the material and product pallets with respect to the shelves (3), the pallet carrying elevator (75) being provided at an upper portion with a work holding device (109) and at a lower portion with a supporting device (95) for supporting and releasing a processing pallet (Pk) to pass and discharge it (Pk) with respect to worktable (13) of the processing machine.