| 摘要 |
A laser beam machining apparatus capable of eliminating a complicated unit arranged to vertically move pallets and adapted to a pallet storage unit for making the heights of upper and lower pallets to be constant so as to simplify the structure thereof and improve the working efficiency. A chain drive mechanism is mounted on a frame, and upper and lower machining pallets are connected to intermediate positions of a chain of the chain drive mechanism. When the lower-stage machining pallet has been moved to a lower machining position, a laser-beam machining head is moved downwards toward a work piece placed on the lower machining pallet to machine the lower work piece without vertical movement of the lower-stage machining pallet.
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