Abstract:
PROBLEM TO BE SOLVED: To wind or unwind a plurality of kinds of films having different functions with a simple structure, and to pull the films with a tension on some level without tightening by a mica wire. SOLUTION: There is provided a movable winding shaft 20 which is movable accompanied by the winding or unwinding operation of the films 210 and 220 with adjacent portions of a first film 210 and a second film 220 wound together therearound. A base end portion of the second film 220 is pivotably supported by a bearing member 30a, and supported by a fixed winding shaft 30 which is not moved by the winding or unwinding operation of the films 210 and 220. The tension in each film can be increased by winding the second film 220 by a predetermined quantity by the fixed winding shaft 30 in an arbitrary state irrespective of each winding quantity of the first film 210 and the second film 220. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus for opening and closing a ventilation film for a greenhouse, with which the drive load on the apparatus is reduced and sealability of the greenhouse is increased. SOLUTION: The apparatus for opening and closing the ventilation film for the greenhouse has a constitution that a combination of a sealing film part 11 and a netlike number 12 provided with hole parts 12d for ventilation is used as the ventilation film 10 for the greenhouse and the ventilation film is wound on winding shafts 21 and 22 in the adjacent direction of the sealing film part 11 and the netlike member 12. Consequently, since the whole hole parts 12d for ventilation formed on the netlike member 12 is closed by unwinding the whole netlike member 12, installation of a canopy-like platy member between the winding shaft and a stationary beam is not required. The driving load of the winding shaft is more reduced than that of a conventional apparatus. Since the installation of the canopy-like platy member is not required, an opening part 110 for ventilation is surely sealed even if the framework materials of the greenhouse cause meander shapes. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensively produceable drive mechanism of an opening and closing apparatus for a greenhouse having a simple structure. SOLUTION: A lever 41 of a toggle switch 40 which is a switch for motor driving is provided so as to be protruded to the outside of a support frame 20. When the lever 41 reaches a winding stop position or an unwinding stop position, the drive mechanism returns the lever 41 to a neutral state by a string member 60 for stopping driving as a drive stop member and directly controls on/off motion of a motor 10. As a result, when the lever 41 is returned to a neutral position in the winding stop position or the unwinding stop position and the motor 10 becomes off state once, the motor is free from fear causing restarting even if external force by the drive stop member is not continuously exerted. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To improve a ventilation function in a greenhouse having a plastic film as an outer cover. SOLUTION: The apparatus for opening and closing an outer cover film has constitution that an intermediate winding shaft 12 is arranged between the base end 21a and the tip 21b of a film 21 for ceiling ventilation functioning as a ventilation member and the film 21 for the ceiling ventilation is wound from the middle part of the film. Consequently, the base end 21a of the film 21 for the ceiling ventilation constituting the ventilation member is arranged in a fixed state. While the plastic film is used as the outer cover, an excessive gap countermeasure means is not needed in comparison with a conventional greenhouse and an opening for ventilation is formed at an arbitrary part such as a ceiling part A, etc., by taking ventilation efficiency into consideration. COPYRIGHT: (C)2004,JPO