| 摘要 |
PURPOSE: A bookshelf supporting board is provided, which makes books perpendicularly stood even though small number of books are placed in the bookshelf supporting board. CONSTITUTION: A bookshelf supporting board comprises: a screwnut(30) of the bored lumber in which the lower part of the cylindrical shape is obstructed; a bolt(20) made of the lumber of the cylindrical shape; and an adsorption plate(10) in which the side spirally becomes unevenness to make coupling of the bolt and screwnut possible and which is attached to the obstructed lower part of the screwnut.
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