| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a portable scaffold capable of quickly and safely changing a supporting height of a handrail frame in the portable scaffold used in the case of elevated place working on a platform of a station. <P>SOLUTION: A working floor 9 is formed on a supporting frame 1, vertical guides 23 are provided on legs 4 of four corners of the supporting frame, both right and left vertical materials 16 of the handrail frame 2 are provided to both right and left vertical guides in a vertically slidable manner, a fixed pin 26 is inserted into through-holes of both of the vertical guides and the vertical materials to decide the height of the handrail frame, and in the portable platform holding an insertion state of the fixed pin by a locking means 27, the locking means supports the fixed pin capable of being inserted into the through-holes, at the same time, the fixed pin is removably pushed into the through-holes by force of a spring 28, in order to release together with both right and left locking means, a string-like unlocking means 34 is tied to the fixed pins of the right and left locking means. Baseboards surrounding the circumference of the working floor are mounted to the upper end sections of the legs in a detachable manner, and each baseboard is separated from a vertical movement range of the handrail frame. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
