| 摘要 |
PURPOSE:To increase the effective area of an opening, by coupling a front panel and a canvas top disengageably and making a canvas mountable/ dismountable onto/from a guide rail. CONSTITUTION:A canvas 25 is coupled disengageably to a front panel 11 and a rear cover 6, and a guide shoe 33 provided to a hood bone member 14 at the hooking side of the canvas 25 is fitted slidably in a groove 21 of a guide rail 20. A lead in/out section opening upward is notched at the rear end section of said guide rail 20. Consequently, when the canvas 25 is pulled rearward, the guide shoe 33 can be separated from the guide rail 20. Since the canvas 25 can be removed from the front panel 11, the effective area of an opening 4 can be enlarged correspondingly.
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