| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the generation of contaminants such as particle. SOLUTION: This work linear travelling device 10 is provided with a driving winding drum 14 and a driven winding drum 16 on the lower and upper sides of a work clamping unit 12. Driving belts 44, 46 are tightly-stretched between the winding drums 14, 16 and the work clamping unit 12. The circumferences of the driving winding drum 14 and the driven winding drum 16 are longer than the traveling distance of the work clamping unit 12 so that the driving belts 44, 46 wound by the winding drums 14, 16 may not overlap each other when the work clamping unit 12 moves to a lower limit or an upper limit. A synchronous belt 60 is wound and tightly-stretched between the driving winding drum 14 and the driven winding drum 16 in the opposite direction to the driving belts 44, 46. When the driving winding drum 14 rotates in such a direction that the driving belt 44 is unwound, the synchronous belt 60 wound around the driving winding drum 14 and rotates the driven winding drum 16 in the same direction as the driving winding drum 14 to wind the driving belt 46 around the driven winding drum 16, thus it is possible to move up the work clamping unit 12.</p> |
