JP2009100697A - Thermal curtain and horticultural house - Google Patents

Abstract

A warming curtain that is easy to install and an agricultural and horticultural house equipped with the warming curtain are provided.
A heat retaining curtain 103 is provided that includes a covering material for covering a specific space in an agricultural / horticultural house 100 and a suspended portion that is detachably suspended from the agricultural / horticultural house 100. To do. The heat insulation curtain 103 is suspended from the agricultural and horticultural house 100 by a wire hook 104.
[Selection] Figure 6

Description

  The present invention relates to a heat insulating curtain and an agricultural and horticultural house using the same.

Agricultural and horticultural houses are usually formed by covering aggregates with materials for house exteriors. In facility horticulture using such an agricultural and horticultural house, representative techniques for maintaining the temperature in the house include heating equipment for heating the house and heat insulation for suppressing heat dissipation from the house. There is technology. However, since the heating equipment uses combustion of heavy oil, gas, etc., the adverse effects on the global environment and house work due to the generation of CO ₂ and the adverse effects on the cultivated crops due to the increase in humidity in the house due to the generation of H ₂ O. It has a problem that it may cause. On the other hand, there is no such problem in the heat insulation technology. Therefore, further development of heat insulation technology is strongly desired.

  As heat dissipation from the house, heat transfer through the material for the house outer covering and aggregate (through-flow heat transfer), heat transfer through the gap of the material for the house outer covering (gap ventilation heat transfer), and There is heat transfer to the ground (surface heat transfer). Of these, clearance ventilation heat transfer is very small compared to once-through heat transfer, and surface heat transfer causes heat storage from the house to the ground during the day, but heat dissipation from the house occurs during the night, so the amount of heat released by subtraction. There are few. Therefore, it is particularly important to suppress heat dissipation due to through-flow heat transfer.

  The once-through heat transfer can be suppressed, for example, by improving the material for the house exterior of the agricultural and horticultural house. Specific examples of the improvement method include a method of covering the coated surface with a heat insulating material, in addition to a method of adjusting the material, thickness, or the number of covered materials of the house outer covering material. In addition, a method is also used in which a coating material is a double membrane and air is sent inside using a blower. However, this method requires equipment such as a blower, and the material of the material for the house exterior to be used is limited to a soft film such as polyethylene.

  In addition, through-flow heat transfer can be suppressed by using a heat retaining curtain. Unlike the above-described method for improving the material for lining the house of an agricultural and horticultural house, the heat insulating curtain that can be opened and closed can adjust the heat insulating effect depending on the season and time zone. That is, for example, using a warming curtain only in winter (closing the warming curtain) to adjust the temperature in the house throughout the year, or opening the warming curtain in the daytime to obtain sufficient solar radiation During nighttime, you can make fine adjustments such as closing the insulation curtain to ensure sufficient insulation.

  Hereinafter, the heat insulation curtain which concerns on a prior art is demonstrated using drawing. FIG. 8 is a front view showing a schematic structure of an agricultural and horticultural house 900 having a heat insulation curtain according to the prior art, and FIG. 9 is a perspective view showing a schematic structure of the agricultural and horticultural house 900.

As shown in FIGS. 8 and 9, the agricultural and horticultural house 900 includes an aggregate 902, a heat insulating curtain 903, and a winder 904 inside the house outer surface 901. The heat retaining curtain 903 is supported by the aggregate 902 and opened and closed by the winder 904.
"Chapter 3 Temperature Control" Facility Horticulture Handbook (5th revised edition), Japan Facility Horticulture Association, p117-141, March 1, 2003

  However, a heat insulating curtain that is easy to install has not been obtained so far. As described above, since the heat insulation curtain according to the conventional technique requires an aggregate, a winder, etc., it takes time and effort for installation. Therefore, there has been a demand for a heat-insulating curtain that is easy to install.

  This invention is made | formed in view of the said subject, and sets it as the main objective to provide the heat insulation curtain which was easy to install, and the agricultural and horticultural house provided with this heat insulation curtain.

  A heat-insulating curtain according to the present invention is a heat-insulating curtain that is installed inside an agricultural and horticultural house to keep the inside of the agricultural and horticultural house warm, and covers a specific space in the agricultural and horticultural house. A covering material and a suspended portion for being detachably suspended from the agricultural and horticultural house are provided.

  According to said structure, since the heat insulation curtain which concerns on this invention is equipped with the coating | covering material, it can cover the specific space in the said agricultural and horticultural house, and can heat this space. Since the heat retaining curtain according to the present invention also includes a suspended portion, it can be easily installed in the agricultural house.

  In the heat retaining curtain according to the present invention, the suspended portion is preferably a structure having a through hole.

  Since the above structure can be suitably used for detachably hanging, it is suitable as the suspended portion.

  It is preferable that the heat retaining curtain according to the present invention includes a plurality of the suspended portions, and the plurality of suspended portions are arranged in a straight line.

  According to said structure, since the heat insulation curtain which concerns on this invention can be suspended from the said agricultural and horticultural house in the to-be-suspended part provided on the straight line, the slack of the said coating | covering material when it suspends Can be suppressed.

  In the heat retaining curtain according to the present invention, the interval between the hanging parts is preferably in the range of 50 to 100 cm.

  According to said structure, since the space | interval of suspension parts is not too wide, when the said thermal insulation curtain is suspended in the said agricultural and horticultural house, the slack of the said covering material can be suppressed, and this space | interval is narrow. Therefore, the amount of work for hanging can be suppressed.

  In the heat retaining curtain according to the present invention, the covering material is preferably symmetric with respect to a straight line formed by arranging a plurality of suspended portions.

  According to said structure, the said heat retention curtain can be suspended with good balance to the agricultural and horticultural house.

  In the heat retaining curtain according to the present invention, it is preferable that the suspended portion is provided with a reinforcing material.

  According to said structure, since the to-be-suspended part is reinforced, durability when it suspends from the said agricultural and horticultural house has improved.

  In the heat insulating curtain according to the present invention, the reinforcing material is strip-shaped, and when the heat insulating curtain is suspended from the agricultural or horticultural house, the length direction of the reinforcing material is parallel to the straight line, The width direction of the reinforcing material is preferably the gravity direction.

  According to said structure, since the said reinforcing material has the rigidity with respect to a bending in the direction of gravity, it can suppress suitably the sagging of the said covering material when the said heat retention curtain is suspended from the said agricultural and horticultural house. it can.

  In the heat retaining curtain according to the present invention, the reinforcing material and the covering material are preferably heat sealed.

  Since the reinforcing material and the covering material are heat sealed, the reinforcing material and the covering material can be bonded easily and firmly.

  In the heat retaining curtain according to the present invention, the difference between the melting point of the covering material and the melting point of the reinforcing material is preferably 30 ° C. or less.

  According to said structure, since melting | fusing point of the said covering material and melting | fusing point of the said reinforcing material are near, peeling etc. of a heat retention curtain can be suppressed.

  In the heat retaining curtain according to the present invention, the main component of the covering material and the main component of the reinforcing material are preferably the same.

  According to said structure, since the main component of the said covering material and the main component of the said reinforcing material are the same, it can adhere | attach suitably. It can also be easily recycled.

  In the heat retaining curtain according to the present invention, the covering material preferably contains an olefin resin or polyvinyl chloride.

  Olefin-based resins and polyvinyl chloride are excellent in transparency and heat insulation, and therefore can be suitably used as the composition of the coating material.

  The agricultural and horticultural house according to the present invention is characterized by including the heat insulation curtain according to the present invention.

  According to said structure, since the said agricultural and horticultural house is equipped with the heat insulation curtain which can be attached or detached easily, the temperature in a self-house can be adjusted easily.

  In the agricultural and horticultural house according to the present invention, it is preferable that the heat retaining curtain is suspended from the top of the agricultural and horticultural house.

  According to said structure, since the said heat retention curtain is suspended from the uppermost part of the said agricultural and horticultural house, the wide range in this agricultural and horticultural house can be heat-retained.

  In the agricultural and horticultural house according to the present invention, the distance from the uppermost part to the heat insulating curtain is preferably in the range of 1/10 to 4/10 of the distance from the uppermost part to the ground.

  According to said structure, since an appropriate air layer is formed between the outer surface of the said agricultural and horticultural house and the said heat retention curtain, a heat retention effect can be heightened.

  Since the heat retaining curtain according to the present invention has a suspended portion, it can be easily installed in an agricultural or horticultural house.

  Hereinafter, the present invention will be described in detail.

  In this specification, “weight” is treated as a synonym for “mass”, and “weight%” is treated as a synonym for “mass%”. Further, “A to B” indicating the range indicates that the range is A or more and B or less. Moreover, in this specification, the "main component" means containing 50 mass% or more.

(Heat insulation curtain)
The present invention provides a thermal curtain. In this specification, the heat insulation curtain means an article that is installed inside an agricultural and horticultural house, covers a specific space in the agricultural and horticultural house, and keeps the space warm. Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a schematic configuration of a heat retaining curtain 10 according to the present embodiment. FIG. 2 is a side view showing a part of the heat retaining curtain 10. FIG. 3 is a perspective view illustrating a usage mode of the heat retaining curtain 10.

  As shown in FIGS. 1 to 3, the heat insulating curtain 10 includes a sheet-shaped covering material 11 and a plate-shaped reinforcing material 12, and a grommet (suspended portion) 13 is provided on the covering material 11 and the reinforcing material 12. Is provided.

  The covering material 11 has a line-symmetric shape and is folded in two along the symmetry axis of the shape. And the reinforcing material 12 is pinched | interposed in the trough part side of the said folded location. While the reinforcing material 12 is bonded to the covering material 11, the portions of the covering material 11 that do not sandwich the reinforcing material 12 are not bonded to each other and are separated. In the direction along the axis of symmetry, the length of the covering material 11 and the length of the reinforcing material 12 are substantially the same.

  In addition, the heat insulation curtain 10 does not necessarily need to be configured by folding the covering material 11. For example, the heat-insulating curtain 10 may be configured by sticking two covering materials 11 to both surfaces of the reinforcing material 12, respectively.

  The eyelet 13 is provided in a portion of the covering material 11 that sandwiches the reinforcing material 12, and a plurality of eyelets 13 are provided at intervals of l along the axis of symmetry. Each eyelet 13 is hooked with a wire hook 20 and used as a suspended portion for hanging the heat retaining curtain 10. The interval 1 between the eyelets 13 may not be equal, but is preferably equal in order to suspend the heat retaining curtain 10 without sagging. A plurality of eyelets are not necessarily provided as long as the heat retaining curtain 10 can be suspended.

  As a material of the covering material 11, a known agricultural film used for an agricultural or horticultural house or a tunnel may be used, and a film mainly composed of an olefin resin or a film mainly composed of polyvinyl chloride is preferably used. Can be used. These substances are preferable because they are excellent in transparency and heat insulation.

  Examples of the olefin resin include homopolymers of α-olefins such as polyethylene and polypropylene, ethylene-propylene copolymers, ethylene-1-butene copolymers, ethylene-4-methyl-1-pentene copolymers, Ethylene-α-olefin copolymers such as ethylene-1-hexene copolymer and ethylene-1-octene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methyl methacrylate copolymer An ethylene-polar vinyl monomer copolymer such as a polymer, an ethylene-vinyl acetate-methyl methacrylate copolymer, or an ionomer resin can be used.

  Examples of the vinyl chloride resin include polyvinyl chloride and copolymers with other comonomers mainly composed of vinyl chloride. Examples of the comonomers include vinyl acetate, ethylene, propylene, alkyl vinyl ether, acrylic ester, Methacrylic acid ester, acrylonitrile and the like can be used. Also, a blend of the vinyl chloride homopolymer or copolymer and a polyolefin containing chlorine such as chlorinated polyethylene, chlorinated polypropylene, and chlorinated polyisoprene can be used.

  What is necessary is just to set the dimension of the coating | covering material 11 suitably according to the magnitude | size of the agricultural / horticultural house where the heat insulation curtain 10 should be installed. Details will be described later.

  The reinforcing material 12 is a reinforcing material for suppressing deformation of the covering material 11. When the heat-insulating curtain 10 is suspended from the agricultural / horticultural house, the most important point is the eyelet 13, and if these positions are shifted, the covering material 11 is also deformed. In order to prevent this, the reinforcing material 12 is arranged at a position connecting the eyelets 13 to each other.

  The material of the reinforcing material 12 is not particularly limited, but from the viewpoint of adhesion to the covering material 11 and recycling, it is preferable to use the same material as the covering material. The main component of the reinforcing material 12 and the covering material 11 are used. It is more preferable that the main component is the same. That is, if the two main components are the same, there is no need to separate them before recycling. Moreover, if it is the same kind of material, physical properties (elastic modulus, bending rigidity, etc.) are similar, and it can suppress peeling when deformed. Furthermore, when the reinforcing material 12 is bonded to the covering material 11 by heat sealing as will be described later, it is preferable to use the same type of material, particularly a material having a close melting point.

  That is, the difference in melting point between the covering material 11 and the reinforcing material 12 is more preferably 30 ° C. or less. If the difference in melting point between the covering material 11 and the reinforcing material 12 is 30 ° C. or less, heat sealing can be easily performed, and even if the ambient temperature changes, problems such as peeling are unlikely to occur. Here, the melting points of the covering material 11 and the reinforcing agent 12 are temperatures measured in accordance with JISK7121. When a plurality of melting point peaks are observed, the highest temperature is taken as the melting point.

  The dimensions of the reinforcing material 12 can be set as appropriate so that sagging of the covering material 11 can be suppressed. Details will be described later.

  The method for adhering the reinforcing material 12 to the covering material 11 is not particularly limited, but it is preferable to perform heat sealing from the viewpoint of ease of processing, cost, and sealing performance.

  The eyelet 13 can be provided by opening a circular through hole in the covering material 11 sandwiching the reinforcing material 12. Further, a ring-shaped resin having the same size as the through hole may be adhered to the through hole. The size of the through hole is not particularly limited, but may be in the range of 4 to 12 mm in diameter.

  In the present embodiment, the eyelet 13 is used to suspend the heat retaining curtain 10 from the agricultural and horticultural house, but the present invention is not limited to this. That is, any structure that can be removably suspended can be used as a suspended portion instead of the eyelet 13. As such a structure, for example, a through hole having a shape other than a circle, a hook, a hanging string, or the like can be used. FIG. 4 is a side view for explaining the above structure. As shown to Fig.4 (a), even if the shape of eyelet 13 is other than circular, the wire hook 20 can be hooked so that attachment or detachment is possible similarly. In addition, as shown in FIG. 4B, when a ring-shaped structure (for example, a string) is bonded instead of the eyelet 13 to form a suspended portion, a hook is inserted into the ring. Thus, the wire hook 20 can be detachably hooked on the suspended portion. Conversely, as shown in FIG. 4C, a hook-like structure may be provided on the heat retaining curtain 10 as a suspended portion. In this case, by using a wire having an annular structure at the tip instead of the wire hook 20, the wire can be removably hooked on the suspended portion. The hook-like structure refers to a structure having a protrusion for supporting a through hole or a ring at the tip.

  Further, the eyelet 13 is not necessarily provided along the symmetry axis. For example, eyelets may be provided at the four corners of the covering material 11, respectively. Even if it is such a heat-insulating curtain, if each eyelet is suspended from the agricultural and horticultural house with a wire hook, it can be easily installed in the agricultural and horticultural house.

  Furthermore, the covering material 11 may not have a line-symmetric shape. However, when the covering material 11 has an axisymmetric shape, the heat insulating curtain 10 can be suspended from the agricultural and horticultural house in a well-balanced manner.

  By the way, when the covering material 11 is suspended in the agricultural or horticultural house, the covering material 11 may sag (see FIG. 7). That is, sagging occurs when the covering material 11 is deformed without force being applied evenly between the eyelet 13 and another eyelet 13. The slack generated in this way tends to collect water droplets, and the collected water droplets may drop on the agricultural products and horticultural products present under the sagging to adversely affect the agricultural products. In order to solve this problem, the present inventors diligently studied and found that the above-described sagging can be suppressed by adjusting the dimensions of the reinforcing member 12, the distance between the eyelets 13, and the like.

  First, the reinforcing material 12 is preferably strip-shaped. The strip shape means a shape that is a rectangular parallelepiped, the length direction is defined by the longest side, the width direction is defined by the second longest side, and the thickness direction is defined by the shortest side. And when the thermal insulation curtain 10 is suspended from the agricultural and horticultural house, it is preferable that the length direction of the reinforcing material 12 is parallel to the symmetry axis and the width direction of the reinforcing material 12 is the gravity direction. Since the reinforcing material 12 as described above has rigidity against bending in the direction of gravity, sagging of the covering material 11 when the heat retaining curtain 10 is suspended from the agricultural and horticultural house can be suitably suppressed.

  Further, the interval l between the eyelets 13 is more preferably 50 cm to 100 cm. If the distance 1 between the eyelets 13 is 100 cm or less, sagging can be suppressed. In addition, when the space | interval l of eyelets 13 is 50 cm or more, it can prevent that the eyelets 13 increase too much and the installation effort becomes huge.

  In addition, the space | interval of eyelets 13 refers to the distance from the center of one eyelet 13 to the center of the adjacent eyelet 13, as shown in FIG. Further, as described above, when a through-hole, hook, strap, etc. having a shape other than a circle instead of the eyelet 13 is used as the suspended portion, as the interval l, one suspended portion is What is necessary is just to use the movement distance when it moves to the position which overlaps with the adjacent suspended part.

  Furthermore, it is more preferable that the dimensions of each member satisfy the following conditions. That is, the bending rigidity (A) of the reinforcing material 12, the width (B) of the reinforcing material 12, the thickness (C) of the reinforcing material 12, the distance (D) between the eyelets 13 and the thickness (E) of the covering material 11 More preferably, the width (F) of the covering material 11 in the direction perpendicular to the symmetry axis satisfies the following formula (1).

A (kg / cm ² ) × B (mm) × C (mm) ÷ D (cm)
> E (mm) × F (cm) (1)
When the above formula (1) is calculated assuming that the specific gravity of the heat insulating curtain 10 is 1, the left side represents the bending strength of the portion reinforced with the reinforcing material 11 (reinforcing portion), and the right side represents the load applied to the reinforcing portion. Can be considered. When the dimension of each member of the heat retaining curtain 10 satisfies the above formula (1), since the reinforcing portion has a bending strength that can sufficiently withstand the load applied to the reinforcing portion, sagging hardly occurs. .

  In this specification, the bending stiffness is measured according to ASTM 747-70.

  By appropriately adjusting the distance between the eyelets 13 and the dimensions of the covering material 11 and the reinforcing material 12 so as to satisfy the above conditions, the sagging of the covering material 11 when suspended from an agricultural or horticultural house is suppressed. Can do.

(House for agriculture and horticulture)
Next, the installation of the heat insulating curtain 10 in the agricultural and horticultural house will be described. FIG. 5 is a front view showing a schematic configuration of an agricultural and horticultural house 100 according to an embodiment of the present invention, and FIG. 6 is a perspective view of the agricultural and horticultural house 100.

  As shown in FIGS. 5 and 5, the agricultural and horticultural house 100 includes an aggregate 101, a house exterior material 102, a heat insulation curtain 103, a wire hook 104, and a packer 105. In the following description, the heat insulation curtain 103 is the same as the heat insulation curtain 10 described above. That is, the heat retaining curtain 103 includes a covering material having a line-symmetric shape, and a suspended portion such as an eyelet is provided on the covering material along the symmetry axis of the shape.

  7A and 7B are photographs showing the inside of the agricultural and horticultural house 100. FIG. 7A is a photograph of the heat insulation curtain 103 taken from below, and FIG. 7B is a photograph of the heat insulation curtain 103 taken from above.

  In the agricultural and horticultural house 100, the outer surface of the house is formed by the aggregate 101 and the material 102 for house covering, and the heat insulation curtain 103 is installed therein. The heat retaining curtain 103 is suspended from the agricultural and horticultural house 100 at the suspended portion by a wire hook 104 suspended from the top of the aggregate 101. The wire hook 104 does not necessarily have to be suspended from the uppermost part of the aggregate 101. However, by suspending the wire hook 104 from the uppermost part, the heat retaining curtain 103 can be installed at a higher position. 103 can cover a wider space.

  The heat retaining curtain 103 is coupled to the side of the agricultural / horticultural house 100 by a packer 105. As the packer 105, a commercially available house packer for agricultural and horticultural use may be used. Moreover, it can replace with a packer and can also use the fastener which can moor the thermal insulation curtain 103 in the agricultural / horticultural house 100, for example, a string.

  The length of the wire hook 104 is more preferably in the range of 1/10 to 4/10 of the distance from the top to the ground. If the length of the wire hook 104 is within the above range, the distance from the top of the agricultural and horticultural house 100 to the top of the thermal curtain 103 (the suspended part) (the shortest distance from the top to the thermal curtain 103) ) Can be in the range of 1/10 to 4/10 of the distance from the top to the ground. Thereby, an appropriate air layer can be provided between the house covering material 102 and the heat retaining curtain 103, and the heat retaining effect of the agricultural and horticultural house 100 can be further enhanced.

  As described above, the size of the heat insulating curtain 103 (actually, the size of the covering material of the heat insulating curtain) may be set as appropriate according to the size of the agricultural and horticultural house 100. For example, the width of the heat insulation curtain 103 along the axis of symmetry (referred to as “the length of the heat insulation curtain 103”) is preferably aligned with the length of the agricultural and horticultural house 100 or longer than the length. By aligning the length of the covering material 11 to the length of the agricultural and horticultural house, the entire interior of the agricultural and horticultural house 100 can be covered. Moreover, if the length of the covering material 11 is made longer than the length of the agricultural and horticultural house 100, it is possible to cover the end portion in the length direction by hanging down the extra portion of the covering material 11. is there. Further, the width of the covering material 11 in the direction perpendicular to the length direction (referred to as “the width of the heat insulating curtain 103”) is the width of the agricultural / horticultural house 100 and the central portion and the end of the heat insulating curtain 103 in a suspended state. What is necessary is just to set suitably by the height difference with a part.

  The agricultural and horticultural house 100 having the above-described configuration is provided with the heat insulation curtain 103, so that the heat insulation effect can be enhanced, and since the heat insulation curtain 103 is detachably suspended, the heat insulation can be easily performed. The curtain can be switched between installation and non-installation.

[Insulation test]
Agricultural / horticultural house equipped with a heat insulation curtain according to the present invention, an agricultural / horticultural house equipped with a heat insulation curtain according to the prior art, an agricultural / horticultural house equipped with a warming machine, and a normal agricultural / horticultural house Verified.

  Verification was conducted in Kitami City, Hokkaido. The same structure was used for the outer structure of the agricultural and horticultural house and the material for the house exterior. Agricultural and horticultural house frontage was 7.2 m, length was 50 m, height was 3.2 m, and a 100 μm thick polyolefin film for agriculture (commercially available) was used as the material for house exterior. In the period from 4/1 to 4/15, the average temperature at 4:00 and 6:00 inside the house was measured.

Example 1
The heat insulation curtain which concerns on this invention was installed in the inside of an agricultural and horticultural house. A 75 μm thick agricultural polyolefin film (commercially available) was used as a covering material for the heat insulation curtain.

(Comparative Example 1)
A heat insulation curtain (commercially available product) according to the prior art was installed inside the agricultural and horticultural house. A 75 μm thick agricultural polyolefin film (commercially available) was used as a covering material for the heat insulation curtain.

(Comparative Example 2)
A heavy oil heater (commercially available) was installed inside the agricultural and horticultural house. It was set to operate when it was below 5 ° C.

(Comparative Example 3)
Nothing was installed.

(result)
The results are shown in Table 1.

  As shown in Table 1, the heat retaining curtain according to the present invention had heat retaining properties comparable to those of the conventional heat retaining curtain and the warming machine without the preparation of prior aggregates or the consumption of heavy oil.

[Sag test]
The heat insulation curtain which concerns on this invention was installed in the inside of an agricultural and horticultural house. As the heat insulating curtain, a heat insulating curtain provided with a covering material, a reinforcing material, and a plurality of suspended portions as shown in FIGS. And in Examples 2-4 and Comparative Examples 4-6, the bending rigidity (A) of the reinforcing material, the width (B) of the reinforcing material, the thickness (C) of the reinforcing material, As shown in Table 2, the interval (D), the thickness (E) of the covering material, and the width (F) in the direction perpendicular to the straight line formed by arranging a plurality of suspended portions of the covering material were adjusted. And it was judged visually whether sagging was made. The results are also shown in Table 2. In the “sag” section, “◯” indicates that there was no sagging, and “x” indicates that sagging was achieved.

  As shown in Table 2, sagging was suppressed when the following formula (1) was satisfied (Examples 2 to 4). On the other hand, when the following formula (1) was not satisfied (Comparative Examples 4 to 6), sagging was formed.

A (kg / cm ² ) × B (mm) × C (mm) ÷ D (cm)
> E (mm) × F (cm) (1)
The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  Moreover, all the academic literatures and patent literatures described in this specification are incorporated herein by reference.

  The present invention can be used in the field of institutional horticulture.

It is a front view which shows schematic structure of the heat retention curtain which concerns on one Embodiment of this invention. It is a side view which shows schematic structure of a part of heat retention curtain which concerns on one Embodiment of this invention. It is a perspective view which shows schematic structure of the heat retention curtain which concerns on one Embodiment of this invention. It is a side view which shows the structure of the to-be-suspended part which concerns on various embodiment of this invention. It is a front view which shows schematic structure of the agricultural and horticultural house which concerns on one Embodiment of this invention. It is a perspective view showing a schematic structure of an agricultural and horticultural house according to an embodiment of the present invention. (A) is the photograph which image | photographed the heat insulation curtain which concerns on one Embodiment of this invention from the bottom, (b) is the photograph which image | photographed the heat insulation curtain which concerns on one Embodiment of this invention from the top. It is a front view which shows schematic structure of the agricultural and horticultural house which concerns on a prior art. It is a perspective view which shows schematic structure of the agricultural and horticultural house which concerns on a prior art.

Explanation of symbols

10 Thermal insulation curtain 11 Covering material 12 Reinforcement material 13 Eyelet (suspended part)
20 Wire hook 100, 900 Agricultural and horticultural house 101 Aggregate 102 House exterior material 103, 903 Insulation curtain 104 Wire hook 105 Packer 901 House outer surface 902 Aggregate

Claims (14)

A heat insulation curtain for installing inside the agricultural and horticultural house to keep the inside of the agricultural and horticultural house warm,
A covering material for covering a specific space in the agricultural and horticultural house;
A heat-insulating curtain, comprising: a suspended portion that is removably suspended from the agricultural and horticultural house.   The heat retaining curtain according to claim 1, wherein the suspended portion is a structure having a through hole. A plurality of the suspended parts,
The heat retaining curtain according to claim 1 or 2, wherein the plurality of suspended portions are arranged in a straight line.   The insulation curtain according to claim 3, wherein the interval between the hanging parts is in a range of 50 to 100 cm.   The heat insulation curtain according to claim 3 or 4, wherein the covering material is symmetrical with respect to a straight line formed by arranging a plurality of suspended portions.   The heat retaining curtain according to any one of claims 1 to 5, wherein a reinforcing member is provided in the suspended portion. The reinforcing material is strip-shaped,
The length direction of the reinforcing material is parallel to the straight line and the width direction of the reinforcing material is the direction of gravity when the heat retaining curtain is suspended from the agricultural or horticultural house. The heat insulation curtain as described in 6.   The heat retaining curtain according to claim 6 or 7, wherein the reinforcing material and the covering material are heat-sealed.   The heat retaining curtain according to any one of claims 6 to 8, wherein a difference between a melting point of the covering material and a melting point of the reinforcing material is 30 ° C or less.   The heat insulation curtain according to any one of claims 6 to 9, wherein the main component of the covering material and the main component of the reinforcing material are the same.   The heat insulation curtain according to any one of claims 1 to 10, wherein the coating material contains an olefin resin or polyvinyl chloride.   An agricultural and horticultural house comprising the thermal insulation curtain according to any one of claims 1 to 11.   The agricultural / horticultural house according to claim 12, wherein the heat-insulating curtain is suspended from the top of the agricultural / horticultural house.   14. The agricultural or horticultural house according to claim 13, wherein a distance from the uppermost part to the heat insulation curtain is in a range of 1/10 to 4/10 of a distance from the uppermost part to the ground.