JP4739740B2 - Resin film coated building - Google Patents

Description

  The present invention relates to a resin film-covered structure suitable for, for example, an agricultural house, and more particularly to a structure in which moisture condensed on the inner surface of a resin film can be effectively discharged to the outside of the building.

  2. Description of the Related Art Conventionally, as an agricultural house for horticultural horticulture, a structure is known in which a metal pipe, an angle material, and the like are connected to form a frame, and a resin film is stretched on the frame. In this agricultural house, the warm air inside the house comes into contact with the inner surface of the resin film whose temperature has dropped due to contact with the outside air, and the moisture falls along the inner surface of the film. Therefore, there was a tendency to make the house humid. When the inside of the house becomes humid as described above, an environment in which pathogenic bacteria are likely to spread is formed. Therefore, it is desired that dew condensation water be discharged to the outside of the house.

  For this purpose, a bowl-shaped water receiver that extends in the horizontal direction in contact with the inner surface of the film of the house is provided, and water that is condensed and dropped is received by this water receiver and connected to the end of the water receiver. There has been known a dew removing device which is made to flow out of a house through a drain pipe.

  In addition, in Patent Document 1 below, an agricultural vinyl film is opened with a plurality of holes at appropriate intervals with a water drainage / ventilation hole having a diameter of 2 mm or more and 5 mm or less as a single hole or an average diameter of 3 mm or more, A film having a working edge on both longitudinal and lateral longitudinal sides of the film to form a curtain film is disclosed.

Further, in Patent Document 2 below, at least the inside of the house of the part A in the joint part (part A) of the material in which two or more covering materials (materials) for the house for horticulture are superimposed on the inside and the outside Disclosed is a house equipped with a drip water drainage mechanism characterized in that the upper end portion of the material is covered with a material so as to set a constant interval portion (part B) without completely adhering to the outer material. ing.
JP-A-11-42023 JP-A-6-205613

  However, the dew removing device provided with a bowl-shaped water receiver in contact with the inner surface of the film of the house has a problem that the structure becomes large and the cost is high.

  Moreover, in the structure which opens a hole like the said patent document 1, since the air inside and outside a house distribute | circulates through this hole, there existed a problem that the heat retention effect etc. by a house would reduce.

  Further, in a house in which a double film is stretched on the frame to form a bag-like space between the films and the air in the house is blown into the bag-like space to enhance the heat retaining effect, as described above. When a simple hole is formed, air escapes from the hole, and there is a problem that the film cannot be held in a tensioned state.

  On the other hand, in the house described in Patent Document 2, the upper end portion of the material inside the house covers the material so as to set a constant interval portion without completely adhering to the outer material. When the air is ventilated from the part and the heat insulation effect is weakened, and the double film is stretched to form a bag-like space between the films, the air in the bag-like space escapes from the gap part. Therefore, there is a problem that the film cannot be held in a tensioned state.

  In addition, the covering material on the inside of the house and the covering material on the outside are overlapped so as to set a certain interval portion. Therefore, when the portion is fixed to the frame, the holding strength of the fixed portion is reduced, and the building There was a problem that the wind resistance strength of the steel was reduced.

  Accordingly, an object of the present invention is to provide a resin film-covered building that can release condensed water generated on the inner surface of the film to the outside without impairing the heat retaining effect.

In order to achieve the above object, the present invention provides a resin film-covered building in which a resin film is stretched on a frame constituting a skeleton of a building to form a roof and / or a wall. A water permeable sheet made of a mesh sheet made of stranded wires, and a lower end portion of the water permeable sheet positioned on the inner surface side of the resin film. The present invention provides a resin film-covered building that is inserted as described above.

According to the said invention, the water | moisture content which condensed on the film inner surface flows along the film inner surface, and when it reaches | attains the lower edge part, the said water-permeable sheet is impregnated. Since the water-permeable sheet is pressed together with the film by the pressing portion, the absorbed moisture can be moved from the inside of the building to the outside by a capillary phenomenon and discharged to the outside of the building. In addition, since the water-permeable sheet is made of a mesh-like sheet made of twisted wires, when the water-permeable sheet is pressed together with the resin film by the pressing member, a fine gap is formed without breaking the twisted wires. The phenomenon can be generated satisfactorily, and moisture flowing down the inner surface of the resin film can be effectively discharged to the outside of the building.

  According to a preferred aspect of the present invention, the presser portion is provided in a portion overlapping the top and bottom of the resin film, and the lower edge portion of the resin film disposed above is the top of the resin film disposed below. The water permeable sheet is disposed on the outer side of the edge portion and overlaps, and the upper end portion of the water permeable sheet is located on the inner surface side of the resin film disposed above, and the lower end portion of the resin film disposed on the lower side. It is inserted between both resin films so as to be positioned on the outer surface.

  According to the above aspect, when moisture condensed on the inner surface of the resin film disposed above falls, it is impregnated into the upper end portion of the water permeable sheet, and moves to the lower end portion of the water permeable sheet by capillary action, Since it flows down to the outer surface of the resin film disposed below, the condensed moisture can be effectively discharged to the outside of the building.

  According to a further preferred aspect of the present invention, the resin film is formed of a double film having a bag-like interior, and has a structure for allowing air to flow inside the double film. The water permeable sheet is provided in a portion that presses the lower edge of the double film, and the upper end of the water permeable sheet is located inside the double film, and the lower end is located outside the building. It is inserted between the double films.

  According to the said aspect, a double film will be in a tension | tensile_strength with the air distribute | circulated to a double film, and the heat retention of a building can be improved. Further, moisture that is condensed and dropped on the inner surface of the double film is impregnated at the upper edge of the water permeable sheet at the lower edge of the double film, and is transferred to the lower edge of the water permeable sheet by capillary action. It can flow out of the heavy film.

  According to a further preferred aspect of the present invention, the mesh size of the mesh-like sheet is 1 to 50 mm.

  According to the said aspect, even if a water-permeable sheet is pinched | interposed strongly with a pressing member, the gap | interval between wires is not crushed and it can produce a capillary phenomenon favorably and can permeate | transmit moisture.

  According to the preferable aspect of this invention, a resin film consists of a transparent resin film.

  According to the said aspect, in the use which requires the light transmission of a resin film, the light transmittance can be favorably maintained.

  According to the present invention, moisture condensed on the film inner surface of the resin film-covered building flows downward along the film inner surface, and when it reaches the lower edge, the water-permeable sheet is impregnated and becomes water-permeable by capillary action. Since it reaches the lower end of the sheet and can be moved from the inside of the building to the outside to be discharged, the condensed water generated on the inner surface of the film is effectively discharged to the outside with a simple structure without impairing the heat retaining effect. be able to. In addition, since water is discharged by the water-permeable sheet, there is no need to provide a space for drainage between the films that overlap one another, and the lower edge of the film can be pressed against the frame and fixed. It is possible to achieve both the holding strength of the film in the part and the good water dischargeability.

  1 to 7 show an agricultural house (greenhouse) which is an embodiment of a resin film-covered building according to the present invention.

  As shown in FIGS. 1-3, this house 10 has the flame | frame 11 formed with the metal pipe, the metal angle material, etc. As shown in FIG. The frame 11 has a roof portion composed of purlins 11a, eaves girders 11b, rafters 11c and the like, and a wall portion composed of pillars 11d, studs 11e, trunk edges 11f, joists 11g and the like. And the transparent resin film 20 is stretched around the outer periphery of this frame 11, and the house 10 is comprised. Further, in the case of a continuous building type as shown in FIG. 1, a valley portion 13 is formed between the roof 12 and the roof 12. Below the roof 12 is a wall 14. The frame 11 is not limited to one having the gable roof as described above, and may have a known arched roof, for example.

  Examples of the resin film include a PVC (polyvinyl chloride) film, a PE (polyethylene) film, a PET (polyethylene terephthalate) film, a fluororesin-based film, and a PVAc (polyvinyl acetate) film. Among them, a PVC film, A PET film and a fluorine-containing resin film are preferable, and a fluorine-containing resin film is particularly preferable.

  Here, the “fluorinated resin” is a generic term for synthetic resins obtained by polymerization of fluorine-containing olefins. In the present invention, those having a fluorine content of generally 45% by mass or more, particularly 50% by mass or more are suitable. Used for. Examples of such a fluororesin include ethylene-tetrafluoroethylene copolymer, ethylene-chlorotrifluoroethylene copolymer, hexafluoropropylene-tetrafluoroethylene copolymer, perfluoroalkyl vinyl ether-tetrafluoroethylene. Examples of the copolymer include polyvinylidene fluoride, polyvinylidene fluoride, and polyvinyl fluoride. In the present invention, any of these can be used, and among them, an ethylene-tetrafluoroethylene copolymer is preferable.

The ethylene-tetrafluoroethylene-based copolymer is mainly composed of ethylene and tetrafluoroethylene (the molar ratio of ethylene / tetrafluoroethylene is generally 40/60 to 60/40), and if necessary, a small amount (usually) 10 mol% or less) of a third comonomer component, and in the present invention, the ethylene / tetrafluoroethylene content molar ratio is 40/60 to 60/40, preferably 45/55, in the range of 55/45, and the formula _{CH 2 = CH-C n F} 2n + 1 ( wherein, n represents an integer of 2 to 10) perfluoroalkyl vinyl monomer unit (e.g. represented by, CH ₂ = CH-C ₄ H ₉ or CH ₂ = content of units) derived from CH-C ₆ H ₁₃ 0.1 to 10 mol%, preferably in the range of 0.3 to 5 mole% eT Len - tetrafluoroethylene copolymer is suitably used.

  This ethylene-tetrafluoroethylene copolymer is known per se and can be produced, for example, by the method described in JP-B-59-50163, and is commercially available from Asahi Glass Co., Ltd. What is marketed with the brand name "COP" can also be used. The film formation from the fluororesin described above can be performed according to a method known per se, for example, by an extrusion molding method, an inflation molding method, or the like.

  10-700 micrometers is preferable, as for the thickness of a resin film, 20-500 micrometers is more preferable, and 40-300 micrometers is still more preferable.

  The transparent resin film 20 is, for example, an eaves girder 11 b that moves from the roof 12 to the wall 14, and the seams of the upper and lower films 20 a and 20 b are fixed by a pressing member 30. Further, the lower end edge of the lower film 20 b is fixed by the presser member 30 in the joist 11 g at the lower end of the wall 14.

  4 and 5, the pressing member 30 includes a fixing plate 31 fixed to the eaves beam 11 b, and the fixing plate 31. It is comprised with the presser plate 32 fitted. The fixed plate 31 includes a substrate portion 31a having an elongated plate shape, both side portions 31b bent in a U-shape, and end portions 31c obtained by further bending the end portions of the both side portions 31b inward. ing. The presser plate 32 has an elongated plate-like substrate portion 32a, one side portion 32b that is rounded into an edge shape, and another side portion 32c that is bent into an L shape. The other side portion 32c is bent at an acute angle on one surface side of the substrate portion 32a, and then bent again toward the outside in parallel to the substrate portion 32a. The edges are rounded so as to protrude to the opposite side.

  And the water-permeable sheet 40 is pinched | interposed between the lower edge part of the upper film 20a, and the upper edge part of the lower film 20b, and these three sheets are pinched | interposed by the said fixing board 31 and the pressing board 32. Fix it. In this case, it arrange | positions so that the lower edge part of the upper film 20a may be located in the outermost side, the water-permeable sheet 40 may be located in the inner side, and the upper edge part of the lower film 20b may be located in the inner side. Moreover, as for the water-permeable sheet 40, the upper end part is located in the inner surface side of the upper film 20a, and a lower end part is located in the outer surface side of the lower film 20b.

The holding plate 32 abuts the one side 32b on the inner side of the bent portion of the one side portion 31b of the fixing plate 31, and the back side of the bent portion of the other side 31c. The other side part 31 b is brought into contact with the pressing plate 32 and can be fitted into the fixing plate 31.
At this time, the upper and lower films 20 a and 20 b and the water permeable sheet 40 are sandwiched and fixed between the fixing plate 31 and the presser plate 32.

  As shown in FIG. 5, the water permeable sheet 40 has an upper end positioned on the inner side of the upper film 20 a, that is, on the indoor side of the house 10, and a lower end thereof on the outer side of the lower film 20 b, that is, a chamber of the house 10. Located on the outside. As a result, the moisture W that is condensed and dropped on the inner surface of the upper film 20 a is absorbed from the upper end portion of the water permeable sheet 40, penetrates by capillary action, and falls from the lower end portion of the water permeable sheet 40. Since the lower end of the water-permeable sheet 40 is located on the outdoor side of the house 10 as described above, the condensed moisture can be discharged outside the room. In the case of this embodiment, it is preferable that the water-permeable sheet 40 is disposed in a belt shape over the entire length of the pressing member 30.

  The water-permeable sheet 40 is not particularly limited as long as the water-permeable sheet 40 has a function of allowing moisture to permeate and release to the outdoor space while being pressed by the pressing member 30. ), Woven fabrics, non-woven fabrics and the like formed of glass fibers, carbon fibers, and the like can be preferably used, and a net-like sheet formed of stranded wires of a synthetic resin wire is particularly preferably used. As such a sheet, a windbreak net for agriculture, for example, “Morica windbreak net” (trade name, manufactured by Morishita Co., Ltd.) can be used.

  As shown in FIG. 6, the water-permeable sheet 40 has a tangled line 42 formed by a synthetic resin wire 41 having a thickness of about 0.05 to 0.7, and a clear dimension (interval between adjacent twisted lines). This is a mesh sheet raschel knitted (entangled knitted) at about 1 to 50 mm. Even if the water-permeable sheet 40 composed of such twisted wires 42 is strongly sandwiched between the pressing members 30, the gaps between the wire materials 41 are not crushed, and the capillary phenomenon can be generated satisfactorily and moisture can be transmitted. A more preferable clear dimension is 1 to 25 mm.

  FIG. 7 shows a structure in which the lower edge portion of the transparent resin film 20 stretched on the roof 12 is fixed by the pressing member 30 in the valley portion 13 formed between the roof 12 and the roof 12. . In this case, a trough 15 is disposed in the valley portion 13. And the lower edge part of the transparent resin film 20 which covers the roof 12 is being fixed by the pressing member 30 arrange | positioned at the both sides of this collar 15. FIG. At this time, the water permeable sheet 40 is disposed on the inner side of the film 20, the upper end of the water permeable sheet 40 protrudes above the presser member 30 and is disposed on the indoor side, and the lower end protrudes below the presser member 30. It is arranged on the ridge 15.

  Accordingly, in the embodiment of FIG. 7, moisture that is condensed and dropped on the inner surface of the film 20 stretched on the roof 12 is absorbed by the water permeable sheet 40 above the presser member 30, and the inside of the water permeable sheet 40 is capillary action. And is discharged from the lower end of the water-permeable sheet 40 onto the ridge 15. As a result, moisture condensed on the inner surface of the film 20 of the roof 12 of the house 10 can be moved to the outdoor side and released onto the ridge 15. In addition, the water | moisture content collected by the ridge 15 moves in any direction along the ridge 15, and is discharged | emitted through the drain pipe arrange | positioned at the edge part of the ridge 15. FIG.

  The water permeable sheet 40 is also inserted into the portion of the holding member 30 disposed along the joist 11g, and moisture that is condensed and dropped on the inner surface of the transparent resin film 20 stretched on the wall 14 is removed from the joist. Through the water-permeable sheet 40 inserted into the pressing member arranged along 11g, it can be discharged outside the room.

  FIGS. 8 to 11 show another embodiment in which the present invention is applied to an agricultural house covered with a double film.

  In this agricultural house 10 a, double films 21 and 22 are stretched outside the frame 11. The double films 21 and 22 are pressed by the pressing member 30 at their edges, and a bag-like space 23 is formed between them.

  As shown in FIG. 11, a blower 50 is installed in the house 10 a, and the blower 50 is connected to a pipe 52 via a hose 51. A plurality of air supply pipes 53 are connected to the pipe 52 at some points, and the tips of the air supply pipes 53 are inserted into the bag-like space 23 through the film 22 on the indoor side. As shown in FIG. 8, an exhaust pipe 54 that discharges the supplied air to the indoor side is connected to the film 22 on the indoor side.

  Accordingly, the air (warm air) in the house 10 a blown by the blower 50 is blown into the bag-like space 23 between the double films 21 and 22 through the hose 51, the pipe 52 and the air supply pipe 53, and double After the films 21 and 22 are inflated in tension, the films 21 and 22 are returned to the house 10a through the exhaust pipe 54. By stretching such double films 21 and 22, it is possible to further enhance the heat retaining effect in the house 10a.

  However, in such a house 10a, there is a problem that dew condensation occurs particularly on the inner surface of the outer double film 21, and the moisture accumulates at the lower edges of the double films 21 and 22. Furthermore, algae are generated in the film by the accumulated water, and when the double films 21 and 22 are transparent resin films, there is a possibility that light transmission may be hindered.

  Therefore, in the present invention, strip-shaped water-permeable sheets 40 are sandwiched between the lower edges of the double films 21 and 22 at a predetermined interval. That is, as shown in FIG. 9, for example, in the eaves girder 11 b, the upper double films 21 a and 22 a and the lower double films 21 b and 22 b are pressed and fixed by the pressing member 30. At this time, the upper double films 21a and 22a are overlapped so that the lower edges of the upper double films 21a and 22a are located outside the upper edges of the lower double films 21b and 22b. The water-permeable sheet 40 is sandwiched in the gap, and they are sandwiched and fixed by the fixing plate 31 and the pressing plate 32 of the pressing member 30. As a result, the upper end portion of the water-permeable sheet 40 is disposed between the upper double films 21a and 22a, and the lower end portion escapes from the upper double films 21a and 22a, and the lower double films 21b and 22b. It is located outside.

  Therefore, when moisture that has condensed and dropped inside the upper double films 21a and 22a, particularly the inner surface of the film 21a, reaches the lower end of the double films 21a and 22a, the water is absorbed by the upper end of the water permeable sheet 40. The water-permeable sheet 40 is permeated into the water-permeable sheet 40 by a capillary phenomenon and discharged from the lower end of the water-permeable sheet 40 to the outside of the house 10a. In this case, if the condensed moisture accumulates to some extent at the lower ends of the double films 21a and 22a, the water permeable sheet 40 does not need to be disposed over the entire length of the holding member 30 because this spreads in the lateral direction. As shown in the form, it is only necessary to arrange the strips at predetermined intervals.

  In addition, the said water-permeable sheet 40 is also arrange | positioned also at the pressing member 30 arrange | positioned in the part of the joist 11g. And the water | moisture content condensed in the double films 21b and 22b of the wall 13 can be discharge | released from those lower end parts.

Example 1
In the agricultural house 10 a having the double films 21 and 22 shown in FIGS. 8 to 11, 30 cm square water permeable sheets 40 were sandwiched between the eaves 11 b and the joists 11 g at intervals of 200 cm.

  The water-permeable sheet used is “Morica windbreak net” (trade name, manufactured by Morishita Co., Ltd.), using polyethylene yarn having a thickness of 330 dtx (300 denier), and having two warp yarns and three weft yarns. A warp yarn 17 course / inch (size: 1.5 mm), and a mesh sheet raschel knitted.

  When 1 liter of water was poured into the double films 21 and 22 in the compartment with the house 10a, the water flowed out of the room through the water-permeable sheet 40 disposed at the lower end of the film, and only for 10 seconds. It was possible to drain.

Comparative Example 1
The same agricultural house 10a as described above, in which the water-permeable sheet 40 is not disposed, is used to cultivate weeds in the house 10a. As a result, moisture condensed in the double films 21 and 22 accumulates at the lower end, and the height becomes about 5 to 10 cm. From there, algae and molds are generated, the sun rays are gradually cut off, which hinders cultivation, and the quality of the weeds declines and decreases.

Comparative Example 2
As in Comparative Example 1, the same agricultural house 10a as described above, which does not have the water-permeable sheet 40, is used to grow strawberries in the house 10a. As a result, as in Comparative Example 1, moisture condensed in the double films 21 and 22 accumulates at the lower end, and algae and fungi are generated from the water, and the sun rays are gradually cut off. Decrease in sales.

  The present invention can be applied to a building covered with a resin film such as an agricultural house or an exhibition hall.

It is a perspective view showing one embodiment which applied the present invention to an agricultural house. It is a front view of the agricultural house. It is a side view of the agricultural house. It is a perspective view which shows the film pressing structure by the pressing member in the agricultural house. It is sectional drawing of the film press structure. It is explanatory drawing which shows an example of the water-permeable sheet pinched | interposed between films in the pressing member. It is a perspective view which shows the structure of the trough part in the agricultural house. It is a front view which shows other embodiment which applied this invention to the agricultural house. It is sectional drawing which shows the film pressing structure by the pressing member in the agricultural house. It is a side view of the agricultural house. It is explanatory drawing which shows the air blowing apparatus in the double film of the agricultural house.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 10a Agricultural house 11 Frame 20, 20a, 20b, 21a, 21b, 22a, 22b Transparent resin film 30 Holding member 31 Fixing plate 32 Holding plate 40 Water-permeable sheet 41 Yarn 42 Strand

Claims (5)

In a resin film-covered building in which a roof and / or walls are formed by stretching a resin film on a frame constituting the skeleton of the building,
A water permeable sheet made of a mesh-like sheet made of stranded wires is attached to the press part that fixes the lower edge of the resin film to the frame, the upper end of the sheet is located on the inner surface side of the resin film, and the lower end is A resin film-covered building, which is inserted so as to be located outside the building.   The resin film-covered building according to claim 1, wherein the resin film is a transparent resin film.   The presser portion is provided in a portion overlapping the top and bottom of the resin film, and the lower edge portion of the resin film disposed above is disposed outside the upper edge portion of the resin film disposed below and overlapped. The water permeable sheet is positioned so that its upper end is located on the inner surface side of the resin film disposed above and its lower end is located on the outer surface of the resin film disposed below. The resin film-covered building according to claim 1 or 2, which is inserted between resin films.   The resin film is formed of a double film having a bag shape inside, and has a structure for circulating air inside the double film, and the presser portion has a lower edge portion of the double film. Provided in the pressing part, the water-permeable sheet is sandwiched between the double films so that the upper end portion is located inside the double film and the lower end portion is located outside the building. The resin film-covered structure according to claim 1 or 2, wherein the resin film-covered structure is inserted. The resin film-covered building according to any one of claims 1 to 4, wherein a mesh size of the mesh sheet is 1 to 50 mm.

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