| 摘要 |
PURPOSE:To detach platen glass without detaching a platen and hold the platen glass and platen at an invariably constant interval by providing the platen glass in a free insertion state, and placing the platen on its top surface across plural balls. CONSTITUTION:A platen glass 9 is fitted to a ceiling board 8 of a housing 4 of a lighting mechanism A which is inserted freely along a couple of left and right guides 3, and a couple of front and rear balls 10 are provided on the left and right sides. The gap t1 between a platen 15 placed on the balls 10 and platen glass 9 is held invariably constant, and the ceiling plate 8 is drawn out easily together with the housing 4 because the balls 10 roll on the reverse surface of the platen 15 to eliminate damage to its reverse surface, and the platen glass 9 is detached without detaching the platen 15 to facilitate the maintenance operation of respective lighting members such as cleaning. |
