JPH0410770Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a heat-insulating coating material for a greenhouse used for cultivating plants such as agricultural products.

[Conventional technology]

As a thermal insulation covering material for a greenhouse, for example,
As disclosed in Japanese Utility Model Publication No. 8993 and Japanese Utility Model Publication No. 1989-8996, a double film structure with an air chamber is known, and the material thereof is usually a thermoplastic synthetic resin film.

[Problem that the invention attempts to solve]

The above-mentioned known sheathing materials do not have the function of actively heating the sheathing material itself to maintain the temperature inside the greenhouse at the required temperature, so they should not be used in cold regions unless a separate heating and heat retention means is provided. Moreover, when the outside temperature drops, the air temperature inside the covering material also drops, so there is a problem that the insulation effect cannot be obtained especially at night, which greatly affects the growth of crops, and a solution to this problem is desired. It was rare.

[Means to solve the problem]

The present invention was developed in view of the above points, and its purpose is to provide an improved thermal insulation covering material for a greenhouse that can heat the covering material itself and maintain the inside of the greenhouse at the required temperature at all times. There is a particular thing. Therefore, the above object of the present invention is to form a sealed bag-like sheet body, which is normally flattened, by welding two films made of thermoplastic synthetic resin on the front and back sides, and to form a sealed bag-like sheet body that is normally flat. Both films are welded in a discontinuous manner at their intermediate portions, and an air supply port and an air exhaust port are provided at opposite peripheral edge portions of the sheet body, respectively.

【Example】

Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, a sheet body 1 is formed by welding (heat sealing) two films 1a and 1b at the entire periphery 2 on the front and back sides, and is formed into a sealed bag shape that is normally flat, and the material is polyethylene or It is a thermoplastic synthetic resin such as ethylene-vinyl acetate copolymer. Both the front and back films 1a and 1b of the sheet body 1 are partially welded (heat-sealed) 3 in a discontinuous manner at their intermediate portions, and are also opposed to each other along opposite peripheral edge portions of the sheet body 1, preferably along diagonal lines. An air supply port 4 and an air exhaust port 5 are provided in the peripheral portion to form a covering material. In addition, the sheet body 1 has a width of 1 to 8 m and a length of 50 m to 50 m.
It is manufactured as a 100 m long product, and a large number of fixing holes 6 are bored at intervals on the welded periphery. The coating material with the above structure is applied to the hotbed 1 as shown in FIG.
The frame 12 constructed around the
While the covering material is tied and fixed to the frame 12 using It can be sent and circulated inside the body 1 as needed to maintain the inside of the temporary house at a required temperature.

[Effects of the invention] The present invention is as described above, and has a structure that allows the covering material itself to be heated at any time, and the inside of the temporary greenhouse can be maintained at the required temperature regardless of the outside air, so it is extremely effective for cultivating crops, etc. In addition, since the middle part of the sheet body is welded in a discontinuous manner, it not only allows hot air to circulate efficiently, but also has a strong and stable body, and the upper part has excellent wind and rain resistance. , its practical value is extremely great.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway plan view, and FIG. 2 is a schematic front sectional view of the device in use. In the figure, 1 is a sheet body, 1a and 1b are front and back films, 2 and 3 are welded parts, 4 is an air supply port, and 5 is an exhaust port.

Claims (1)

[Scope of utility model registration request] Two films made of thermoplastic synthetic resin, front and back, are welded around the entire periphery to form a sealed bag-like sheet that is normally flat, and the middle part of both the front and back films of this sheet is discontinuous. 1. A heat insulating covering material for a greenhouse, characterized in that the sheet body is welded with air, and an air supply port and an air exhaust port are respectively provided in opposing peripheral edge portions of the sheet body.