| 摘要 |
PROBLEM TO BE SOLVED: To install a side fence on the bottom side even in a bed by detachably constituting the side fence on a side frame. SOLUTION: This side fence 2 is detachably installed on the back bottom 3a by a holding mechanism 4. The side fence 2 is an ordinary inserting type side fence, and has a pair of leg parts 2a, 2a and a fence part 2b. The holding mechanism 4 has a base frame member 6 having the prescribed length detachably installed in a width directional end part of the back bottom 3a, and the base frame member 6 is provided with holding members 7a to 7d for holding the side fence 2 in a desired position by selectively inserting a pair of leg parts 2a, 2a of the side fence 1, and the base frame member 6 is detachably fastened by a bolt on the under surface side of the back bottom 3a via a support frame member.
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