| 摘要 |
PROBLEM TO BE SOLVED: To provide a lifting type platform fence of which a drive mechanism is simplified while improving visibility.SOLUTION: When a motor 55 of a strut stationery part 50 is driven, a chain 62 is rotated via a chain sprocket 61. As the result, a strut lifting part 20 is elevated via a lifting shaft 31 with respect to the strut stationery part 50. In the strut lifting part 20, a wire 35 is wound around an upper part wire pulley 33 and a lower part wire pulley 34. A first wire stationery part 36 of the wire 35 is fixed to the strut stationery part 50. As the result, the wire 35 is rotated by elevation of the strut lifting part 20, a block 43 for a third bar is moved upwards in association of rotation of the wire, and further, the block 43 for the third bar pushes up a block 42 for a second bar.SELECTED DRAWING: Figure 9 |
