| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensively produceable sheet-opening and closing apparatus for greenhouses, equipped with a guide mechanism having a simple structure. <P>SOLUTION: The guide mechanism is composed of a string-like member (a string-like member for guides) 50 and the one end is fixed through a screw member to the side end of the greenhouse and the other end is connected to the upper end of a mounting frame 23 of a drive mechanism 1. Since tension of the string-like member 50 for guides is applied to the drive mechanism 1, rotation of the drive mechanism 1 is restricted and the drive mechanism 1 can be operated following a winding pipe 70. The guide mechanism has a simple constitution of the string-like member 50 and can inexpensively be produced compared with a structure using a conventional guide pipe, or the like. <P>COPYRIGHT: (C)2004,JPO |
