JPS6145799Y2 - - Google Patents

Description

[Detailed explanation of the idea] In order to enhance the heat retention effect inside the greenhouse, a large number of wire rods are installed in the width direction of the greenhouse at a predetermined interval at a desired height inside the greenhouse. Curtains that can be opened and closed are laid on top of the book wires, and the curtains are opened during the day to make effective use of sunlight, and at night they are closed to blow hot air only into the limited space under the curtains. There is. Conventionally, galvanized iron wire, PVC coated iron wire, etc. have been used as wire materials, but galvanized iron wire,
PVC-coated iron wire is not the best wire material to use in a greenhouse atmosphere. In other words, the temperature inside a greenhouse is very high and condensation often occurs, as well as the spraying of disinfectant and fumigation, so if galvanized wire is used, rust will develop within two to three years. The curtains become slippery and become unusable. In addition, with PVC-coated iron wire, the surface layer of the coating becomes brittle due to evaporation and migration of the plasticizer in the PVC, and cracks appear in the coating, gradually making the curtain slippery and making it unusable. I can't stand it anymore.

The present invention was devised to eliminate such drawbacks, and as explained below with reference to the drawings, a large number of wire rods 2 are arranged at a predetermined interval at a desired height inside a greenhouse 1. In a greenhouse 1 with a curtain, which is installed in the width direction of the greenhouse 1 and has a curtain 3 that can be opened and closed on a large number of installed wire rods 2, the wire rods 2 are stretched uniaxially to reach a temperature of 70°C. The present invention relates to a greenhouse with curtains 1 characterized in that polyethylene terephthalate wire is used which shrinks by about 0.3 to 3% when heated.

In the greenhouse 1 with a curtain according to the present invention, a uniaxially stretched polyethylene terephthalate wire (hereinafter referred to as
The use of PET wire (PET wire) has the following advantages.

PET wire has excellent moisture resistance and pesticide resistance, and its surface does not change in slipperiness, so once it is installed in a greenhouse, there is no need to replace it and it can be used permanently.

PET wire has excellent cleaving properties and maintains a taut state without loosening, making it particularly suitable as a wire material for supporting curtains.

If you stretch the PET wire appropriately and give it heat shrinkability so that it will shrink by about 0.3 to 3% when heated to 70℃, even if there is some slack during the construction work, the temperature inside the greenhouse will be maintained at a later date. The PET wire can be made taut by rising.

When pulled out from the coil during construction work, iron wire tends to twist due to the curls and form knot-like kinks, requiring extreme care when working, but PET wire has low torsional rigidity and does not cause kinks. Therefore, the work is easy.

Unlike other plastic wires, PET wires do not leave bends when they are bent, so they are easier to bundle when installing them in a greenhouse.

The tensile strength of PET wire is approximately 45Kg/ ^mm2 ,
It is almost equivalent to iron wire and has sufficient tensile strength.

The polyethylene terephthalate wire that can be used in the present invention and shrinks by about 0.3 to 3% when heated to 70°C by being uniaxially stretched is uniaxially stretched by 3.5 to 5.5 times after extruding polyethylene terephthalate. Examples include linear bodies produced by stretching, and the cross section of the linear body may be circular with a diameter of 1.0 to 3.0 mm, or may have an area approximately equivalent to this. It may be oval.

To install the PET wire 2 in the width direction of the greenhouse 1,
For example, in a pipe installed along the side wall of greenhouse 1.
After tying one end of PET wire 2, stretch PET wire 2 in the width direction of greenhouse 1;
Place the PET wires 2 at intervals of 2 to 4 m on the pipes 6 hung from the hanging rings 5 suspended from the ridge 4 of the greenhouse 1, and then connect the other ends of the PET wires 2 to the pipes installed along the opposite side walls of the greenhouse 1. Just tie it together. Greenhouse 1
Generally, the interval between PET wires 2 installed in the width direction of
The length should be 30 to 100 cm. Further, it is preferable that the PET wire 2 is installed at a position slightly higher than the height of the plants cultivated in the greenhouse 1.

In order to lay the openable/closable curtain 3 on a large number of installed PET wires 2, for example, the following procedure may be performed. The inside of the greenhouse 1 is divided along the ridge 4 into two equal parts, and two curtains 3 are used to cover each part.
are placed on the PET wire 2, and the outer ends of the curtains 3 are fixed along the side walls of the greenhouse 1, respectively. A pipe 7 is hung on a hanging ring 5 suspended from a ridge 4 of a greenhouse 1. After fixing the end of the rope 9 to the pipe 7 with the rope band 8, the rope 9 is wound around the pipe 7 several times, and then the rope 9 is stretched in the width direction of the greenhouse 1. The rope and the curtain 3 are fixed with a clip 10 at a portion where the rope 9 crosses the inner end of one of the curtains 3. After a rope 9 is bent through a pulley 1 attached to a pipe provided along one side wall, the rope 9 is stretched in the direction of the opposite side wall and passed over the pipe 6. The rope 9 and the curtain 3 are fixed with a clip 10 at a portion where the rope 9 crosses the inner end of the other curtain 3. After the rope 9 is bent through a pulley 11 attached to a pipe provided along the opposite side wall, the rope 9 is stretched toward the pipe 7. Next, after wrapping the rope 9 around the pipe 7 several times, the rope 9 is wrapped around the pipe 7 using the rope band 8.
Fix the end of the pipe to the pipe 7. It is preferable that such ropes 9 are sequentially provided at intervals of 2 to 4 m in the depth direction of the greenhouse 1. In order to close the curtain 3 by drawing the inner ends of the curtain 3 to the center of the greenhouse 1, the pipe 7 is rotated by the carriage 12 provided at the end of the pipe 7, as shown in FIG. It is sufficient to move the rope 9 in the direction of the arrow A shown in FIG. The rope 9 may be advanced in the direction of arrow B shown in FIG. The curtain 3 that can be used in the present invention includes polyethylene film,
Examples include polyvinyl chloride film and cheesecloth.

In Figures 2 and 3, carriage 1
Although the pipe 7 is rotated by the carriage 12, the pipe 7 may be rotated by a motor instead of the carriage 12. Furthermore, in the greenhouse with curtains according to the present invention, another layer of curtains may be provided on top of such curtains, and the curtain may have a two-layer structure to further improve the heat retention effect in the greenhouse. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a greenhouse with curtains according to the present invention, FIG. 2 is a perspective view showing the greenhouse with curtains according to the present invention with the curtains attached, and FIG. FIG. 1 is a plan view showing a greenhouse with curtains according to the present invention with curtains attached. 1... Greenhouse, 2... Uniaxially stretched polyethylene terephthalate wire, 3... Curtain.

Claims (1)

[Scope of utility model registration request] A large number of wire rods 2 are installed in the width direction of the greenhouse 1 at a desired height at a predetermined interval within the greenhouse 1, and a curtain 3 that can be opened and closed is laid on the installed multiple wire rods 2. In the greenhouse 1 with a curtain, the wire 2 is made of polyethylene terephthalate wire that shrinks by about 0.3 to 3% when heated to 70°C by being uniaxially stretched. greenhouse.