| 摘要 |
<P>PROBLEM TO BE SOLVED: To inexpensively provide a curtain opening/closing device having an extremely simple structure to readily open or close a curtain for a hothouse or the like for warming the hothouse for example; and to provide a curtain opening/closing drum employed in the device. <P>SOLUTION: The curtain opening/closing drum comprises the following: a first drum winding or rewinding one end of a curtain opening/closing wire; a second drum independent from the first drum and winding or rewinding the other end of the curtain opening/closing wire; and a clutch allowed to be fixed to a driving axis with a fixing tool, allowed to be engaged/disengaged to/from the first drum and the second drum respectively, and comprising a clutch member provided with a first clutch part having an engaging/disengaging mechanism formed corresponding to the first drum, and a second clutch part having an engaging/disengaging mechanism formed corresponding to the second drum; so that the drum gets flexibly rotatable around the driving axis when the clutch is disengaged from the drum. <P>COPYRIGHT: (C)2008,JPO&INPIT |
