JP2010029166A - Curtain structure of greenhouse - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a curtain structure of a greenhouse which is foldable in an accordion form by evacuating the air, and excellent in opening and closing operation. <P>SOLUTION: This curtain structure is configured such that innumerable pores are formed in each of two films constituting a curtain body, and many connection parts are set in the horizontal and vertical directions of the two superposed films so that places of the connection parts are recessed to evenly bulge the curtain body when introducing gas. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a greenhouse curtain structure that is easy to open and close and has excellent heat retention.

Indoor temperature control is important for growing plants grown in greenhouses in a favorable environment. For this purpose, a mat-like object made of double upper and lower films is formed on the ceiling of the greenhouse so that the predetermined temperature is maintained, and air is blown into it to inflate the room when it is necessary to keep warm. Various curtain devices have been proposed that take into consideration that the temperature does not escape due to illusion (see, for example, Patent Documents 1 to 3).
JP 51-45033 A JP 2004-141017 A JP 2007-20492 A

  The thing of patent document 1 is conventionally known as a technique installed in the roof or a wall surface side using the film of the double structure which carried out the heat seal of the circumference | surroundings. In this technology, gas is encapsulated in a double film consisting of upper and lower films, and a gas layer that expands like a balloon is stretched on the ceiling or the like to keep the inside of the greenhouse warm. The double film is made by superimposing two pieces of polyethylene, vinyl chloride, etc., and the whole is inflated by sending gas from the inlet. This technology is different from the one with two flat structures, and it has a certain heat retaining property in that a double wall is formed by creating a gap between the upper and lower films by the pressure of the gas injected inside. Although it is thought that it can be maintained, of course, the bulge of the central part becomes large by putting gas, so it is unsuitable for implementation in a large house, and the air pressure at the place where the bulge becomes large becomes large and impact etc. When added, there are problems such as being easily broken like a balloon, and when the air is removed, moisture remains inside and the film cannot be folded in a well-balanced manner when it is contracted by moving in the opening direction.

  Thus, the technique described in Patent Document 2 is also common to Patent Document 1 in that air is sent into the film to expand the whole. This technology is intended to have a good effect on the work surface that it is easy to cover the film and can be attached to a conventional greenhouse without the need to build a scaffolding or troublesome work. Yes, the structure of the film itself does not have a particularly bulging shape at the center, but when it is contracted from the stretched state, especially when the air is vented, the two films adhere to each other due to moisture generated inside, and a smooth movement occurs. There is concern about the inconvenience of being unable to fold in order.

  Furthermore, as in Patent Document 3, there is a technology that prevents the heat from escaping from the outside to the outside by attaching an air mat to the ceiling and side walls of the greenhouse in a planar shape. Air mats are spread, and air mats are pre-filled, and the entire structure is configured by laying them in order. There is a contradiction such that it cannot be folded easily and indoor ventilation is not easy.

  The present invention is different from the prior art as described above, and adopts a means for sending gas into the interior, but the whole bulges on the average in the shape of a gymnastic mat, and the folding / extending operation is performed quickly and reliably. It is intended to provide a curtain structure of a greenhouse that can effectively incorporate the plant and can realize a favorable environment for plant growth.

  That is, the present invention is a greenhouse curtain structure in which the peripheral edges of two films are sealed and gas is sent into the interior to form a bulge as a whole, and each of the two films constituting the curtain body has innumerable fineness. A hole is formed, and a plurality of coupling portions are provided in the vertical and horizontal directions of the two overlapped films. When the gas is introduced, the coupling portion becomes a concave portion, and the curtain main body uniformly bulges.

  When the curtain body bulges, the inner and outer concave portions formed in the two films are separated from each other.

  Relative portions of the inner and outer recesses formed in the two films when the curtain body bulges are in close contact with each other.

  When gas is fed into the curtain body, a large number of recesses are formed at the joint of the two films, and the curtain body becomes a gymnastic mat with a uniform bulge as a whole, and the gas spreads evenly throughout the body. If the curtain body is arranged near the ceiling side or the side wall of the greenhouse, the indoor temperature can be kept at an appropriate temperature without leaking to the outside, and a suitable environment for growing plants in the greenhouse can be obtained.

  There are countless fine holes in the two films, so some gas leaks out of the curtain body, but the amount of air sent into the main body is much larger than that leaked out of the fine holes. There is no change in the bulging state of the curtain body, and the room is sufficiently warmed by the air layer in the curtain body. And the air function works by the gas slightly released from the micropores, the generation of moisture in the main body is suppressed, and therefore the two films do not adhere to each other when the curtain body is vented and contracted Moves smoothly.

  When the curtain body bulges, the connecting portion becomes a recessed portion, and when the entire body contracts, the recessed portion exerts the function of a fold, so that the curtain body is folded in an accordion shape. For this reason, unlike the conventional product, it can be operated quickly and reliably, and it does not operate excessively, so that the product life can be maintained, and the curtain body is extended not only at the time of contraction, but the room is closed. Even if it works smoothly.

  The embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows two films 10 and 10 having the same shape made of agricultural films. Each film 10 and 10 has innumerable fine holes 11. Is formed. The fine holes 11 have a diameter of about 2 mm and are arranged at intervals of about 10 cm in the vertical and horizontal directions. Both films 10 and 10 are hermetically sealed by heat-sealing their peripheral edges, and swell when gas is taken in from an inlet (not shown).

  FIG. 2 illustrates a state in which the curtain body 20 is configured by the two overlapping films 10 and 10 including the coupling portion 30. That is, (a) is a flat curtain body 20 before sending the gas, and the coupling part 30 has the bent end portions 32 of the synthetic resin rod-shaped body 31 on each inner surface of the films 10 and 10 as shown in (b). Attach and fix the bent piece 32 with the adhesive 33, or form the latching pieces 35 at both ends of the rod-like body 34 as shown in (c), and attach the latching pieces 35 to the outer surfaces of the films 10 and 10. Although it is configured by arranging on the outer surface of the circular reinforcing piece 36 attached to the film, the connecting portion 30 is merely an example, and in essence, the films 10 and 10 are connected at a predetermined interval or not illustrated. It can also be set as the coupling | bond part of the form which closes two films by welding.

  FIG. 3 shows an example in which the curtain body 20 is bulged by sending a gas. A concave portion 40 is formed in the coupling portion 30 on the inside and outside of the films 10 and 10, and the relative portion of the concave portion 40 is the rod-shaped body. They are spaced approximately equal to the length of 31 and 34. For example, if the length of the rod-like bodies 31 and 34 is 5 cm, the thickness of the inner and outer recessed portions 40 is about 5 cm, and in that case, the thickness of the curtain body 20 excluding the recessed portions 40 is about 10 cm when expanded. Of course, if the connecting portion 30 is formed by welding means, the inner and outer recessed portions 40 do not have a thickness greater than that of the film. The installation interval between the vertical and horizontal concave portions 40 is about 50 cm, and depending on the size of the installation location, the curtain body 20 has a side of several m to 10 m or more, so a large number of the concave portions 40 are also arranged. Thus, the curtain body 20 is a bulging body having a gym mat-like undulation.

  FIG. 4 shows an example in which the curtain body 20 is stretched over the greenhouse 50. In the figure, the curtain body 20 is installed on the ceiling 51 and the side wall 52, but it may be arranged only on either one depending on the case. When the curtain body 20 on the ceiling 51 side is formed in an inclined shape, it is convenient that the blower 60 can be attached immediately below the center. This is a mechanism in which gas is sent from the blower 60 into the curtain main body 20, and when the curtain main body 20 is attached to the side wall 52 side, it is effective to install a blower 60 'as a sub. The air supply means from the blowers 60 and 60 'to the curtain main body 50 is a general one and is not particularly conspicuous, and thus detailed description thereof is omitted.

  The curtain body 20 before the introduction of the gas has a flat shape with the inner and outer films 10 and 10 being close to each other. The ceiling body 51 and the side wall 52 serve as a shield because the curtain body 20 arranged on the inner surface side does not allow the room temperature to escape to the outside. A good environment is obtained. The gas sent to the curtain body 20 by the blower 60 slightly leaks from the fine holes 11 of the film 10, but the amount of leaked gas is very small compared to the amount of air sent, so the curtain body 20 is in a bulging state. On the other hand, since the micropores 11 exhibit the air circulation function, when the air supply is stopped, no excessive water retention occurs in the curtain body 20, and the inner and outer films 10 and 10 are in close contact with each other when they contract from the expanded state. Even if they do not adhere to each other.

  FIG. 5 shows an example in which the curtain body 20 is folded from the stretched state to release the ceiling 51 and the side wall 52 side. When the operation of the blower 60 is stopped and the air supply is stopped, the curtain body 20 that has been swelled up to that point is flattened due to the release of air, and is moved to a predetermined position in the greenhouse 50. Since the concave portion 40 is formed in the curtain body 20, this portion exhibits a bending function when contracted, and the whole can be folded like an accordion. And when it is in a stretched state, the one-sided one is easily pulled out, so that both opening and closing can be reliably and quickly operated.

  In the above embodiment, specific numerical values are shown for the fine holes 11 and the like, but these are reference examples and are not restricted by the numerical values, and the fine holes 11 of the inner and outer films 10 and 10 are, for example, the outer film. Air leakage from the film (located on the ceiling side and on the side wall side on the outdoor side) may be extremely less than that on the inside (the film on the ceiling side on the bottom side and the side wall side on the indoor side), Of course, there is no problem even if the hole diameters and the number of holes of the two films 10 and 10 are different, and the structure of the connecting portion 30 is not limited to that shown in the drawings unless it departs from the object and effect of the present invention.

It is explanatory drawing of two films. It is explanatory drawing of the curtain main body which provided the coupling | bond part. It is explanatory drawing of the bulging curtain main body. It is explanatory drawing which extended the curtain main body in the greenhouse. It is explanatory drawing which shrunk the curtain main body in a greenhouse.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Film 11 Fine hole 20 Curtain body 30 Joint part 40 Recessed part 50 Greenhouse

Claims (3)

  It is a greenhouse curtain structure in which the entire periphery of the two films is sealed and gas is sent into the inside to form a bulge shape, and innumerable fine holes are formed in each of the two films constituting the curtain body, A greenhouse curtain structure characterized in that a plurality of coupling portions are provided in the vertical and horizontal directions of the two overlapped films, and when the gas is introduced, the coupling portion becomes a concave portion and the curtain body uniformly bulges.   The greenhouse curtain structure according to claim 1, wherein relative portions of the inner and outer recessed portions formed in the two films are separated when the curtain body bulges.   2. The greenhouse curtain structure according to claim 1, wherein relative portions of the inner and outer recessed portions formed in the two films are in close contact with each other when the curtain body bulges.

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