JPS58158112A - Method and apparatus for winding up and unwinding sheet in greenhouse - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and an apparatus for winding up or unwinding sheets such as vinyl films that are spread in a greenhouse in order to open and close these sheets.

In particular, the present invention allows the opening and closing of vinyl sheets for ventilation in greenhouses (such as sheets placed on the outermost side of roofs, etc., or vinyl films placed on the inside of glass with a certain space provided). A method and apparatus for winding and unwinding a sheet suitable for opening and closing an indoor curtain.

For example, in a conventional winding device or method for opening and closing sheets of indoor curtains, etc., a winding rod is mounted on a frame material on which a sheet is stretched, and the winding rod is mounted on a frame material on which the sheet is stretched. One end is fixed, and the winding rod is rolled on the frame material to wind up the sheet, or the rod is reversed to unwind the sheet wound around the rod. This is a book written by This device or method can be used, for example, in
-Compared with a rope or wire operation (-) curtain opening/closing device as disclosed in Japanese Patent Publication No. 21300 (2), the structure is simpler because a pulley used for operating a wire, etc. is not required, and the pulley and seat are connected to each other. It has been highly praised for its low wear and tear on the sheets, with no worries about them getting entangled.

This winding device and method operate smoothly when winding a narrow sheet, such as a width of 2 m or less, but when winding a wide sheet, various wrinkles and long windings occur on the sheet. There has been a drawback that the sheet cannot be wound smoothly due to the deflection of the take-up rod.Furthermore, in the above-mentioned apparatus and method, the sheet is rolled up while rolling the take-up rod on the frame material. It is necessary to always keep the sheet under some tension due to the weight of If the slope is small,
There was a drawback that winding was difficult.

An object of the present invention is to solve the above-mentioned drawbacks in the method and apparatus for winding or unwinding a sheet by rotating a winding rod on a frame material as described above. Provides a method and device that allows for smooth winding and unwinding of sheets even when the sheet is wound up without wrinkles and stretched over a frame material placed horizontally or in a near-horizontal state. It's about doing.

The following is a concrete explanation of the embodiment with reference to the drawings.
Fig. 2 schematically shows an opening/closing device for sheets such as indoor curtains using the method and device of the present invention, and in these figures, l is the inside (2 Frame members 1 are arranged at regular intervals, and each frame member 1 is supported at both ends by girder members 2 that also serve as valley gutters.

A transparent sheet (b) such as a vinyl film is stretched over the upper surface of the frame material 1, and a predetermined space C is formed between the roof (a) and the sheet (b). One end of the sheet b is fixed to the central part of the frame material 1 (the top member 3 installed on the top member 3) by an appropriate method, and the other end is placed on the frame material l in the vicinity of the girder material 2. If the sheet b is stretched while being fixed to the winding rod 4, but the length of the sheet b is long, C2 is
The sheet b is not fixed to the top member 3, but both ends of the sheet b are properly attached to the winding rod 4°4 on the same frame material l.

Each winding rod 4 is rotated twice manually or automatically by suitable means, so that the top of the frame material is When the sheet b is rolled up, it is rewound when it rolls in the opposite direction.

The above configuration is the same as that of the conventional device, but in the present invention, each winding bar 4 has a slit-shaped sheet passage hole 51 formed on one side for passing the sheet b, so that the entire winding rod 4 can be seen from the side. Approximately annular or cylindrical regulating frames 5 surrounding the rod 4 are attached at predetermined intervals, and each regulating frame 5 is supported by a spring 6.
By tensioning each rod 4 in the opposite direction of the winding rotation direction, that is, in the opposite direction of the arrow A, each winding rod 4 is constantly applied with a force weaker than the sheet winding force of the mosquito winding rod 4 by the regulating frame 5. It is constructed so that it can be pulled in the opposite direction to the winding rotation direction. The regulating frame 5 is preferably formed integrally with a plastic or metal plate, etc. In this embodiment, a metal plate is used that is formed into the shape shown in the figure and then coated with a resin on its surface. In addition, in this embodiment, as shown in detail in FIGS.
The front end 54 of the contact portion 53 is bent outward of the frame 5 by more than 90 pupils. A sheet passage hole 51 is formed between the tip 54 and the bottom 52.Furthermore, in this embodiment, the spring 6 is a clockwork spring as shown in FIG. is wound around a round bar 21 fixed on the girder 2, and its end is connected to the regulating frame 5. As described above, according to the method and apparatus of the present invention, which has two configurations, the winding rod 4 is pulled in the opposite direction to the winding rotation direction by the regulating frame 5, so that the winding rod b is always at a moderate level (:
being taut, and that the inner front part of the regulating frame 5 is in contact with the sheet b being wound around the winding rod 4;
(2) As a result, the sheet b is tightly wound, no wrinkles are formed on the sheet b during the winding operation, and there is no deflection of the winding rod 4 caused by the wrinkles, so even a wide sheet can be wound smoothly and neatly. Also, according to the present invention, since the winding rod 4 is pulled in the opposite direction to the winding rotation direction, the installation angle of the frame material l is small, or
Or, even if the device is installed horizontally, it can be smoothly wound up or rewound.

[Brief explanation of the drawing]

FIG. 5 is an enlarged side view showing an example of a spring, and FIG. 5 is a plan view of the main part of FIG. 3. In the main figure, the symbol l is the frame material, 4 is the winding rod, 5 is the adjustment frame, 51 is the sheet passage hole, 52 is the bottom, 53 is the contact part, 54 is the tip of the contact part, 6 is the spring, and b is the sheet. be. Patent applicant Yoshimi Hayakawa

Claims (5)

[Claims] (1) At a predetermined interval (: one end of the sheet stretched on the upper surface of the arranged frame material is fixed to a winding rod mounted on the frame material, and the winding rod is completely covered with the frame material. In the method for unwinding a material, the winding bar is
- A slit-shaped sheet passage hole formed on the side (= a predetermined interval E in which the sheet is passed through and the entire sheet surrounds the winding bar when viewed from the side). A greenhouse characterized in that the frame material can be rolled on the frame material under tension with a force smaller than the sheet winding force of the winding rod in (2) Rolling the sheet stretched at a predetermined interval (2) on the frame material with the winding rod (:) In a device for unwinding a material that has been taken up or wound up, (k) the winding rod (2) the generally annular or cylindrical regulating frame having a slit-shaped sheet passage opening formed on one side, as seen from the side; The sheets are passed through the sheet passage hole and the regulating frames are installed at predetermined intervals so as to surround the winding bar, and each regulating frame is used to wind the winding bar with a force smaller than the sheet winding force of the winding bar. A sheet winding/unwinding device for a greenhouse, characterized in that the sheet is pulled in a direction opposite to the winding direction. (3) Claim (2) in which the sheet is a transparent vinyl film. (4) The regulating frame has a flat bottom in the installed state c2, and the part that contacts the front side of the winding rod in the winding rotation direction is perpendicular or perpendicular to the bottom part c2, and has a two-sided state c2, and its tip Claim (21 +
= Sheet winding/unwinding device in the greenhouse described. (5) The means for pulling the regulating frame in the direction opposite to the winding rotation direction of the winding rod is a coil spring or a helical spring.Claim (2): Winding and unwinding of the sheet in the greenhouse according to item 2. Device.