| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that an optional part sometimes cannot be fitted to an already installed writing board, as the optional part used on the writing board is often manufactured by a different manufacturer not related to the writing board and that, especially when the optional part is fitted to a copying board whose board face is scrolled, the board face is scrolled and therefore, the optional part cannot be installed on the board face. SOLUTION: The upper end part of a belt member 16 is mounted on the upper side edge part 23 of the writing board 2. In addition, the lower end part of the belt member 16 is also mounted on the lower wall face 22a of a dust receiving rail 22b of the writing board 2 through a tacky member 18. Further, a sensor 3 which is the optional part is made to stick to the planar parts 17b of the fitting parts 17 by adjusting an interval between the fitting parts 17.
|
