| 摘要 |
PROBLEM TO BE SOLVED: To prevent an operator from losing sight of a light spot by mounting a laser emission source on a lift bracket or a fork, forming light beam emitting from the laser emission source long sideways via a lens and forming a straight line light spot over both left and right ends and a beam part at a center part in a pallet width direction. SOLUTION: At a position where the same plane as a fork tip part of a lift bracket can be irradiated on a straight line, an optical pallet detecting device 1 is mounted. The detecting device 1 has a connector 3 connected by an electric energy supplying source and electric wire 8, a laser emission source 4, a lens 5 and a lens fixing member 6 at the inside of a hollow cylinder body 10. Straight line light flux emitting from the light emission source 4 refracts at a cylindrical lens 5 and diffuses long sideways in a horizontal surface direction in a plane view fan shape, that is, an irradiation surface. A light spot of a prescribed length of the horizontal surface direction formed by laser beam becomes a long sideways shape when the pallet is irradiated and a wide range including an insertion hole of the pallet can be irradiated.
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