摘要 |
A projector ( 1 ) enabling the extension/retraction of a column even when the column is rotated, including the telescopic column ( 4 ) installed on a carrier ( 6 ) as a base, a lifting and lowering device ( 21 ) installed in the column ( 4 ), a lighting apparatus ( 2 ) installed at the tip of the column ( 4 ), and a power supply ( 5 ) for supplying power to the lighting system ( 2 ). The column ( 4 ) is formed of circular tubes and rotated in conjunction with the lifting and lowering device ( 21 ). Also, the column ( 4 ) is formed by loosely fitting, to each other, a first column ( 13 ) fixed to the carrier ( 6 ) and second and third columns ( 4 a) and ( 4 b) having outer diameters reduced in that order less than that of the first column ( 13 ). The second and third columns ( 4 a) and ( 4 b) are loosely fitted to each other so as to be moved in the vertical direction and rotated in conjunction with each other.
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