Patent ID: 8071909

Claim:
A three-dimensional laser beam machining apparatus for a long workpiece, which performs three-dimensional laser beam machining on the long workpiece, comprising: a base disposed in the lengthwise direction; a three-dimensional laser beam machine disposed in the central part of the base; an automatic loading device for a large variety of materials; a common conveyer having a plurality of receiving members configured to move in a horizontal direction and configured to commonly convey a first type material supplied in a bundle form and having a cross-sectional shape such that the posture around the axis line is aligned automatically during the conveyance, and a second type material which has a cross-sectional shape such that the posture around the axis line is not aligned automatically during the conveyance; and an unloading device for unloading a machined workpiece; wherein the automatic loading device and the unloading device are disposed with the three-dimensional laser beam machine being held therebetween, the automatic loading device includes: a bundle type material loading device configured to load a plurality of the first type materials onto a conveyor included in the automatic loading device; the conveyor configured to send the plurality of first type materials in the horizontal direction to a stopper and through a two-tier stack preventive device, each included in the automatic loading device; the stopper configured to regulate the forefront position of the sent first type material; the two-tier stack preventive device disposed on the upstream side of the stopper to prevent the sent first type material from being stacked in two or more tiers; an adjuster configured to adjust a horizontal position of the stopper and a height position of the two-tier stack preventive device; a swing arm configured to send out a front one of the plurality of first type materials one by one over the stopper onto an inclined conveyor included in the automatic loading device; and the inclined conveyor configured to align two or more of the plurality of first type materials in a line and send the two or more first type materials to the common conveyor.