| 摘要 |
PROBLEM TO BE SOLVED: To facilitate attaching work/manufacture and to easily absorb manufacture errors. SOLUTION: Pillars 3 provided on both left and right sides of an upper horizontal shaft part 2 are constituted of upper side vertical shaft parts 4 almost vertically bent on both left and right sides of the horizontal shaft part 2, lower side vertical shaft parts 5 provided on the lower part of the upper side vertical shaft parts 4 with a left-to-right interval narrower than the upper side vertical shaft parts 4 and inclined parts 6 provided at least between the upper side vertical shaft parts 4 and the lower side vertical shaft parts 5. At the time, to bent parts between one of the upper side vertical shaft part 4 and the lower side vertical shaft part 5 and the inclined part 6, fitting grooves 12 on both left and right sides of a connection body 10 separately formed of synthetic resin are fitted.
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