| 摘要 |
PROBLEM TO BE SOLVED: To provide a stepladder, the level of which can be easily adjusted even if an installation surface has a step. SOLUTION: In either of front legs of the stepladder, a telescopic inside pipe is inserted into an outside pipe, and the length of the inside pipe can be structurally adjusted to an arbitrary one by fastening a ring, attached to the outside pipe, by means of a screw. Thus, the expansion/contraction of the leg can be arbitrarily adjusted even in a stepped place, and a horizontal level can be easily secured. This enables the safe and rapid use of the stepladder. COPYRIGHT: (C)2007,JPO&INPIT
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