JP5520634B2 - Roll screen device - Google Patents

Description

  The present invention relates to a roll screen device having a power generation function in a screen portion.

  Conventionally, roll screen devices used at the side of walls and windows have been mainly used for light shielding, but in recent years, a solar cell has been provided on the screen to perform both light shielding and power generation. (For example, see Patent Document 1).

  This roll screen device has a sheet-like solar cell module having flexibility and a take-up drum capable of winding the solar cell module. The solar cell module can be taken up by a take-up drum when it is used after being pulled out and is not used for power generation.

  The solar cell module used for such a roll screen device is mainly composed of a film-like solar cell unit cell and a covering portion that covers the surface of the solar cell unit cell in order to protect the solar cell unit cell.

  The covering portion is preferably made of a transparent or translucent resin so that sunlight is received by the power generation element. Moreover, this coating | coated part has an area larger than a power generation element so that the whole power generation element can be covered.

Japanese Patent Laid-Open No. 11-145503

  In the above roll screen device, since the coating is a transparent or translucent resin and has a larger area than the power generation element, a transparent or translucent part is present in a part other than the part covering the power generation element. it can. For this reason, sunlight is transmitted from a transparent or translucent resin portion that does not cover the power generating element, and the light shielding function, which is the original purpose of the roll screen device, is reduced.

  This invention is made | formed in view of such a situation, and makes it a subject to provide the roll screen apparatus which fully combines a power generation function and a light-shielding function.

The present invention is to solve the above-described problem, and includes a roll screen having a screen portion configured in a sheet shape and a holding portion that holds the screen portion so that the state of the screen portion can be changed between a use state and a storage state. in the device, the screen unit includes a solar cell unit cell, and a cover portion covering both sides of the solar cell unit cell is provided with shielding means on the back side opposite to the power generation surface of the solar cell unit cells, shielding It means is a light shielding member having a predetermined area provided in the covering portion of the back side of the solar cell unit cell, the light shielding member, Ru is configured to a size to cover the whole of the covering portion provided on a rear surface side of the solar cell unit cell It is characterized by that.

  According to such a configuration, the light shielding can be reliably performed by providing the light shielding means on the back surface side of the solar cell unit cell. And since the light-shielding means is not provided in the electric power generation surface side of a solar cell, sufficient electric power generation can be performed.

Moreover, by providing a light shielding member on the covering portion on the back surface side of the solar cell, it is possible to reliably shield the light and perform sufficient power generation by the power generation surface of the solar cell.

Moreover, according to the roll screen apparatus which concerns on this invention, it is desirable for the said light-shielding member to be comprised by the fiber base material or the resin base material.

Moreover, according to the roll screen apparatus which concerns on this invention, it is desirable that the light-shielding rate of the said light-shielding member is 40 to 95%.

Moreover, according to the roll screen apparatus which concerns on this invention, the structure which has the design layer provided in the outer surface of the said light-shielding member is employable.

  Moreover, as for the roll screen apparatus which concerns on this invention, it is desirable for the said solar cell unit cell to be an amorphous silicon type solar cell.

  According to such a configuration, the solar cell unit cell can be made as thin as possible to manufacture a screen portion that is lightweight and highly flexible.

  Moreover, as for the roll screen apparatus which concerns on this invention, it is desirable for the said coating | coated part to be comprised with the vinyl chloride resin.

  According to this structure, a highly flexible screen part can be manufactured.

  According to the present invention, it is possible to provide a roll screen device that has both a power generation function and a light shielding function.

It is a front view of the roll screen apparatus which concerns on 1st Embodiment. It is a perspective view of a roll screen device similarly. It is a fragmentary sectional view of a screen part. It is a fragmentary sectional view concerning the example of a reference of a screen part. It is a fragmentary sectional view concerning the example of a reference of a screen part. It is sectional drawing of a holding | maintenance part. It is sectional drawing of a holding | maintenance part. It is a front view which shows the modification of the roll screen apparatus which concerns on 1st Embodiment. It is a front view which shows the modification of the roll screen apparatus which concerns on 1st Embodiment. It is a front view which shows the modification of the roll screen apparatus which concerns on 1st Embodiment. It is a front view which shows the modification of the roll screen apparatus which concerns on 1st Embodiment. It is a front view which shows the modification of the roll screen apparatus which concerns on 1st Embodiment. It is a front view of the roll screen apparatus which concerns on 2nd Embodiment. It is a perspective view of a roll screen device similarly.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. 1 to 12 show a first embodiment of a roll screen device according to the present invention.

  As shown in FIGS. 1 and 2, the roll screen device 1 mainly includes a screen unit 2 and a holding unit 3 that holds the screen unit 2. An attachment member 15 having a latching hole 16 is provided on the upper outer surface of the holding unit 3, and hooks and protrusions provided on a ceiling material, window frame, beam, wall surface, etc. of the building are inserted into the latching hole 16. Thus, the roll screen device 1 can be hooked. In addition, as the holding part main body 11, what is generally used for latching roll screen apparatuses, such as an angle and a mounting bracket, is applicable.

  In the present embodiment, the screen unit 2 is configured as a rectangular sheet having flexibility. The screen portion 2 has an upper end portion in the longitudinal direction connected to the holding portion 3 and an anchor portion 4 provided at the lower end portion. The anchor part 4 has a built-in weight bar (not shown) made of a heavy object, and applies a force in the direction of pulling the screen part 2 downward, and applies tension to the screen part 2 to provide flatness. It has the effect of enhancing. The weight bar can be selected from a heavy object that can give a suitable weight, such as a metal such as iron, stainless steel, or aluminum, or a resin material such as plastic or rubber.

  As shown in FIG. 3, the screen unit 2 includes a solar battery unit cell 5 that is a power generation element, a sealing material 6 that seals the solar battery unit cell 5, and a solar battery unit via the sealing material 6. It has the coating | coated part 7 which covers both surfaces 5a and 5b of the cell 5, and the light-shielding means 8 provided in the back surface 5b side of the solar cell unit cell 5. FIG.

  Examples of the solar cell unit cell 5 include an amorphous silicon type as exemplified in JP2009-066502A and JP2009-135544A, and as exemplified in JP2008-186663A. A dye-sensitized type is adopted. Amorphous silicon solar cells are more flexible than crystalline solar cells and have the advantage that their thickness can be reduced to about 1/200. Is possible. In addition, the amorphous silicon solar cell unit cell 5 can generate power efficiently even at low illuminance, and is also suitable for power generation indoors because it has high conversion efficiency even with a fluorescent lamp having a wavelength of 400 nm to 700 nm (visible light region). Yes. For this reason, when this invention is used also indoors, it can be used conveniently. Furthermore, since it is resistant to heat, it can be used even at high temperatures in summer.

  The thickness of the solar cell unit cell 5 including the sealing material 6 is preferably, for example, 0.01 mm to 1.5 mm, and more preferably about 0.02 mm to 0.2 mm. As the sealing material 6 of the solar cell unit cell 5, for example, ethylene evalate is used.

  In the solar battery unit cell 5, the size of the unit unit 5c is, for example, 207 mm × 832 mm (not limited to this size), and by connecting a plurality of the unit units 5c in parallel or in series, The roll screen device 1 can be set to various sizes according to the size of the construction site and the required power generation.

  In the present embodiment, as shown in FIG. 1, the solar cell unit cell 5 in which eight unit units 5 c are connected is built in the screen portion 2. When the solar cell unit cell 5 is configured by connecting a plurality of unit units 5c, each unit unit 5c is arranged with a predetermined interval from the other unit units 5c.

  In the example of FIG. 1, the unit units 5c are arranged so that the longitudinal direction of the rectangular unit units 5c is along the vertical direction. In this example, eight unit units 5c are arranged in 2 rows and 4 columns. As another modified example, for example, unit units 5c are arranged in 2 rows and 2 columns as shown in FIG. 8, or unit units are arranged in 2 rows and 6 columns as shown in FIG. Regardless of the number of 5c, free arrangement is possible. Thus, by changing the arrangement of the plurality of unit units, the screen unit 2 can be made different without changing the configuration of the unit units. This makes it easy to manufacture according to the size of the window to which the size of the roll screen device 1 is attached. In addition, it is possible to use a general-purpose solar cell unit cell in which it is difficult to change the size of the unit unit.

  As a further modification, for example, as shown in FIG. 10, the longitudinal direction of the rectangular unit unit 5 c is set along the horizontal direction, and a plurality of (four in the illustrated example) unit units 5 c are vertically arranged. It is also possible to arrange them. Furthermore, as a modification, as shown in FIG. 11, a plurality (8 in the example) of unit units 5c are arranged in 4 rows and 2 columns, or as shown in FIG. 12, a plurality (12 in the example) ) Unit units 5c may be arranged in 6 rows and 2 columns. As described above, by changing the direction of the unit units, it is possible to widen the range of the shape change of the screen unit 2 composed of unit units of the same size. Such a method can be used particularly effectively when a general-purpose solar cell unit cell in which it is difficult to change the size of the unit unit is used.

  As shown in FIG. 3, the solar cell unit cell 5 is covered with a covering portion 7 (7a, 7b) on the power generation surface (light receiving surface, front surface) 5a side and the opposite back surface 5b side. A sheet-shaped light shielding member 8 a having a predetermined area is provided as a light shielding means 8 on the outer surface of the covering portion 7 b that covers the back surface 5 b side of the solar battery unit cell 5.

  As for the coating | coated part 7, it is desirable for the part 7a which covers the electric power generation surface 5a of the solar cell unit cell 5 to be comprised with transparent or translucent resin. Thereby, light permeate | transmits the coating | coated part 7 and reaches | attains the electric power generation surface 5a, and can perform desired electric power generation.

  The covering portion 7 is made of a resin such as PTFE, and is integrally formed so as to sandwich the solar battery unit cell 5 by laminating as exemplified in Japanese Patent Application Laid-Open No. 2009-59897. This coating | coated part 7 is comprised by the size (area) larger than the solar cell unit cell 5 so that the whole solar cell unit cell 5 can be coat | covered. The covering portion 7 can employ various sizes according to the size of the construction site of the roll screen device 1 such as 460 mm (horizontal) × 1730 mm (vertical), 920 mm × 1730 mm, 1380 mm × 1730 mm, and the like.

  The gap between the unit units 5c of the solar cell unit cell 5 and the hole formed in the amorphous silicon type solar cell unit cell (not shown: exemplified in JP2009-0665022A and JP2009-135544A). As a result of light leakage from the openings, etc., the light shielding performance as a roll screen cannot be ensured. When viewed indoors, the form and color tone are not visually stable. There was a problem such as lack of quietness. The present invention solves these problems by providing a solar power generation roll screen having a light shielding property and a light diffusion function by providing the light shielding member 8a.

  In the embodiment of FIG. 3, the light shielding member 8 a is fixed to the covering portion 7 b on the back surface side of the screen portion 2 with an adhesive. In this way, by adopting a configuration in which the light shielding member 8a is fixed to the covering portion 7b, many types of light shielding members can be used relatively easily.

  The thickness of the light shielding member 8a is determined in consideration of light shielding properties, flexibility and durability required for the screen portion 2, and is usually preferably 50 μm or more and 800 μm or less. The light shielding member 8a is preferably configured to have the same size as the covering portion 7 so that the entire covering portion 7b on the back surface side of the screen portion 2 can be covered, for example. In this case, since the difference in translucency due to the solar battery unit cell 5 is alleviated, the user of the present invention can obtain a visually stable state with respect to form and color tone when viewed from the room. . Further, the observation from outside can be prevented by the shielding property.

  As another example, for example, the light shielding member 8a may be provided only in a portion that does not cover the solar battery unit cell 5 in the covering portion 7b on the back surface side. In this case, since the user of the present invention can see the back side of the solar battery unit cell 5 from the room, it can be visually confirmed that the solar power generation function is incorporated in the screen unit 2.

  When used on the north, northwest, and northeast sides where daylighting is important, the degree of shading is used in the south, southwest, and southeast areas where the shading rate is important within the range of 40 to 60%. In such a case, it is preferable to select the light shielding rate within a range of 70 to 95%. If further finer light shielding adjustment is required, a plurality of screen portions 2 having different light shielding rates can be simultaneously applied. It is. Further, when the installation position is not specified, it is preferable to set the light shielding rate within a range of 50 to 80%. By setting such a light shielding rate, it is possible to appropriately take in external light and to ensure visual stability and shielding properties with respect to form and color tone.

  As the base material of the light shielding member 8a, for example, a fibrous fiber base material including a nonwoven fabric, a knitted fabric, a woven fabric, a resin base material using a resin as a base material, or the like is used. When the light shielding member 8a is formed of a fiber base material, for example, various organic and inorganic fibers such as natural fibers, chemical fibers, metals, and glass can be used. For example, natural fibers such as cotton and hemp, polypropylene fibers, polyester fibers, nylon fibers, acrylic fibers, rayon fibers, polyamide fibers, and synthetic fibers such as polyvinylidene chloride fibers can be used alone or in combination. As the fiber material, glass fiber is preferably used from the viewpoints of durability, weather resistance, form stability, flame retardancy, waist strength, and the like. By using it as a fiber base material, it is excellent in texture, and natural light shielding and light diffusion due to the fiber can be performed. Therefore, the light shielding member 8a having excellent visual and design can be obtained. In addition, the resin base material has a high degree of freedom in parameters such as layer thickness, flexibility, light shielding properties, and diffusibility, and can be manufactured at a relatively low cost.

  When the light shielding member 8a is made of a fiber base material, the weave structure is preferably the above-described diagonal weave from the viewpoints of weaving property, texture, transparency, and form stability. Or a coarse texture such as a knit structure or a net structure, and the density of the structure and the thickness of the thread used can be arbitrarily selected as necessary.

  When the light shielding member 8a is formed of a resin base material, for example, plastics such as polyvinyl chloride, polystyrene, polyethylene, polypropylene, polyester, acrylic, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, triacetyl cellulose, and polyvinylidene fluoride A film can be appropriately selected and used. As the base resin of the resin base material, a vinyl chloride resin, a flame retardant polypropylene resin, or the like is preferable in consideration of flame retardancy or flame resistance required for the screen portion 2 and flexibility. The resin base resin preferably contains one or both of carbon black and titanium oxide for the purpose of improving light shielding properties. Carbon black and titanium oxide are desirably blended in a total blending amount of 0.1 wt% to 30 wt% with respect to the base resin, and 0.5 wt% to 10 wt%. The following ranges are more preferable, and the optimal range is 1% by weight or more and 3% by weight or less. If the blending amount is less than 0.1% by weight, the light-shielding property required for the light-shielding layer may be insufficient. The required flexibility may be insufficient. This blending amount can be appropriately set according to the light shielding property and flexibility required for the screen.

  Further, by providing the design layer 9 on the outer surface of the light shielding member 8a, it is possible to impart color tone and design properties suitable for the indoor environment. The design layer 9 may be a fibrous material having a design, a resin material, or a printing film or a colorant. As the fibrous material, colored and colored woven yarns coated with thermoplastic synthetic resin can be used. By selecting the weaving pattern, color selection, and color scheme, color tone and design suitable for the indoor environment should be attached. Can do. Further, in the case of a resin-based material, it is possible to provide a color tone and design properties suitable for the indoor environment by providing a resin layer having a design. As a suitable resin, for example, plastic films such as polyvinyl chloride, polystyrene, polyethylene, polypropylene, polyester, acrylic, polycarbonate, polymethyl methacrylate, polyethylene terephthalate, triacetyl cellulose, and polyvinylidene fluoride can be used.

  In order to protect the design layer 9, a protective layer 10 made of a resin having a transparent or colored transparent or design such as UV resin or vinyl chloride resin may be formed on the design layer 9 (see FIG. 3). .

  The design layer 9 and the protective layer 10 are configured to be integrally fixed to the outer surface of the light shielding member 8a through an adhesive such as polyester, polyurethane, or acrylic. As the adhesive, it is preferable to use a polyester-based adhesive from the viewpoint of weather resistance that does not cause yellowing.

  In addition, the design layer 9 desirably contains 0.1% by weight or more of titanium oxide in order to improve the concealability, and the content thereof is desirably 30% by weight or less. If it is less than 0.1% by weight, the effect of improving the concealing property due to the addition is poor, while if it exceeds 30% by weight, the effect of improving the concealing property does not increase. The optimum range is from 2% by weight to 7% by weight.

  Moreover, you may comprise the light shielding member 8a by forming the light shielding layer by a metal vapor deposition layer in the at least one surface of the said resin base material. A metal vapor deposition layer is comprised by vapor-depositing an aluminum film on the single side | surface of a polyester sheet, for example. Since the metal vapor deposition layer has a high light shielding effect even in a thin film, it can be effectively used when it is desired to reduce the thickness of the screen portion 2.

FIG. 4 shows a reference example of the light shielding means 8. In this example, the light shielding means 8 is provided between the back surface 5b of the solar cell unit cell 5 and the covering portion 7 on the back surface 5b side. With such a configuration, the light shielding means 8 can be made relatively thin, and the entire screen portion 2 can be made thin. If the screen part 2 is thinned, flexibility will be improved and winding will become easy. Further, since the covering portion 7 also serves as a protective layer, there is an advantage that the light shielding means 8 is sufficiently protected. Since the light shielding means 8 is disposed between the layers, it is necessary to reduce the thickness of the light shielding means 8. Therefore, it is desirable to use the resin base material that is relatively easy to reduce the film thickness. desirable. In addition, the design layer 9 may be provided on the surface of the light shielding means 8 on the covering portion 7b side.

FIG. 5 shows a reference example of the light shielding means 8. In this example, the light shielding means 8 is made of a resin material in which the covering portion 7b itself covering the back surface 5b side of the solar cell unit cell 5 has light shielding properties. More specifically, this can be achieved by blending light-shielding particles such as carbon and titanium oxide in the covering portion 7b. By comprising in this way, the screen part 2 whole can be made still thinner, the flexibility of the screen part 2 can be improved, and winding can be made still easier. Moreover, you may provide the design layer 9 in the surface of the coating | coated part 7b. Carbon black and titanium oxide to be blended in the coating portion 7b are desirably blended in a total blending amount of 0.1 wt% to 30 wt% with respect to the resin of the coating portion 7b. More preferably, the range is from 5% by weight to 10% by weight, and the optimal range is from 1% by weight to 3% by weight. If the blending amount is less than 0.1% by weight, the light-shielding property required for the light-shielding layer may be insufficient, and if it exceeds 30% by weight, there is almost no improvement in the light-shielding property even if it is added more than that. The required flexibility may be insufficient. This blending amount can be appropriately set according to the light shielding property and flexibility required for the screen. In addition, since the solar cell unit cell 5 needs insulation, it is desirable to mainly use titanium oxide with high insulation.

  FIG. 6 is a partial cross-sectional view schematically illustrating the internal structure of the holding unit 3 according to the first embodiment. The holding unit 3 has a mechanism for holding the screen unit 2 so that the state of the screen unit 2 can be changed between a use state and a storage state. More specifically, the holding unit 3 includes a holding unit body 11 having a predetermined space inside which is generally called a curtain box, and a winding mechanism 12 for the screen unit 2.

  The holding part main body 11 has an opening 11a at its lower end, and is configured such that the screen part 2 can be taken in and out from the opening 11a. Moreover, the holding | maintenance part main body 11 has the attachment member 15 which can be easily attached to the ceiling and wall part of a building in the outer surface upper part. With this attachment member 15, the holding unit main body 11 is fixed to a ceiling material, window frame, beam, wall surface, or the like of the building.

  The winding mechanism 12 includes a long frame 21 called a set frame that is fixed to the inner surface of the holding body 11, two side plates 22 that protrude downward from each longitudinal end of the frame 21, 2 A support shaft 23 fixed between the two side plates 22, a winding pipe 24 rotatably supported by the support shaft 23, a lock means 25 for locking and unlocking the rotation of the winding pipe 24, and a winding And an operation member 26 for performing a winding operation of the take-up pipe 24.

  FIG. 7 is a cross-sectional view illustrating a schematic configuration of the holding unit main body 11. As shown in FIG. 7, one end 2 </ b> A of the screen portion 2 is fixed to the fitting groove 24 a provided in the winding pipe 24 by a locking member 34. The take-up pipe 24 is rotatably supported around the support shaft 23 with the support shaft 23 inserted through the take-up pipe 24. The take-up pipe 24 can take up the screen portion 2 on its outer surface by rotating in a predetermined rotation direction.

  As shown in FIG. 6, a coil spring 33 is provided at a substantially central portion in the longitudinal direction (axial direction) of the winding pipe 24. The coil spring 33 has a support shaft 23 inserted into the coil spring 33, one end thereof is fixed to the take-up pipe 24, and the other end is fixed to the support shaft 23. The take-up pipe 24 is always urged by the coil spring 33 in the rotational direction in which the screen portion 2 is taken up.

  As shown in FIG. 6, the locking means 25 is provided inside both ends of the winding pipe 24 in the longitudinal direction. As shown in FIG. 7, the lock means 25 includes a clutch spring 27 and a stopper case 28 provided so as to cover the clutch spring 27.

  The clutch spring 27 is configured to allow the winding pipe 24 to rotate such that the screen unit 2 is sent out of the holding unit main body 11. Further, in the normal state, the clutch spring 26 is configured such that the rotation of the winding pipe 24 in the direction of winding the screen portion 2 is restricted, and the restriction is released when the operation member 26 is operated.

  The operating member 26 employs a pull cord in this embodiment. One end portion of the operation member 26 is fixed to the outer surface side of one end portion in the longitudinal direction of the winding pipe 24, and the other end portion is exposed from the holding portion main body 11. More specifically, one end portion of the operation member 26 is wound around a winding portion 29 provided on the outer peripheral surface of one end portion of the winding pipe 24. The winding portion 29 has an annular concave portion (or groove) 30 continuous in the circumferential direction of the winding pipe 24, and the operation member 26 can be wound through the concave portion 30.

  The direction in which the operation member 26 is wound around the winding pipe 24 is opposite to the direction in which the screen unit 2 is wound around the winding pipe 24. As a result, the operation member 26 operates in reverse to the operation of the screen unit 2. More specifically, when the operation member 26 is pulled downward and pulled out from the holding portion main body 11, the screen portion 2 is wound by the rotation of the winding pipe 24. At this time, the rotation restriction of the winding pipe 24 by the clutch spring 27 is released, and the screen portion 2 can be wound up without requiring a large force due to the biasing by the coil spring 33. A pull handle 26 a is provided at the tip of the operation member 26, and is configured to be easily pulled by the operator when the operation member 26 is pulled downward. Further, when the screen portion 2 is pulled downward and pulled out from the holding portion main body 11, a part of the operation member 26 is taken up by the take-up pipe 24.

  With the structure of the holding part 3 as described above, when the anchor part 4 provided at the lower end part of the screen part 2 is pulled and pulled out from the holding part 3 and released, the lock means 25 causes the winding pipe 24 to rotate. The screen portion 2 is restricted and held in a state of being exposed from the holding portion 3. At this time, by pulling out the screen portion 2, a force in the direction of pulling up the screen portion 2 is accumulated in the coil spring 33. Note that a pull cord or a pulling hand may be provided at the lower part of the anchor portion 4 in order to facilitate the operation of pulling down the screen portion 2 by the operator. Also,

  Hereinafter, a state in which the screen unit 2 is pulled out and held from the holding unit 3 in this way is referred to as a use state of the screen unit 2. In this use state, it is possible to use the screen portion 2 by exposing the screen portion 2 to the middle portion thereof or by pulling out the entire screen portion 2 from the holding portion 3 and exposing it.

  When the operating member 26 is pulled downward and pulled out from the holding unit main body 11, the lock of the screen unit 2 is released by the locking means 25, and the winding pipe is taken up by the rotational force generated by pulling out the holding unit main body 11 and the accumulated force of the coil spring 33. 24 rotates and the screen part 2 is wound up. When the winding of the screen unit 2 is completed, the screen unit 2 exposed from the holding unit 3 is stored in the holding unit 3.

  Further, the operation member 26 can be omitted by increasing the accumulated force of the coil spring 33. In that case, when the screen portion 2 in use is slightly lowered downward, the lock of the screen portion 2 by the lock means 25 is released, and the action of the coil spring 33 that urges the winding pipe 24. Only by this, the winding pipe 24 completely winds the screen portion 2. With this configuration, the screen unit 2 exposed from the holding unit 3 without the winding operation by the operation member 26 can be stored in the holding unit 3.

  Hereinafter, the state in which the screen unit 2 is stored in the holding unit 3 in this way is referred to as a stored state. In addition to the above-described storage method, the roll screen device 1 can also bring the screen unit 2 into the storage state by pulling the operation member 26 downward.

  According to the roll screen device 1 according to the present embodiment described above, the light shielding means 8 can be reliably shielded by providing the light shielding means 8 on the back surface 5b side of the solar cell unit cell 5 in the screen portion 2. And since the light-shielding means 8 is not provided in the electric power generation surface 5a side of the solar cell unit cell 5, sufficient electric power generation can be performed. Thereby, the roll screen apparatus 1 which has sufficient electric power generation function and light-shielding function is realizable.

  In this case, the light shielding means 8 is a light shielding member 8a having a predetermined area provided on the covering portion 7 on the back surface 5b side of the solar cell unit cell 5, or the back surface 5b of the solar cell unit cell 5 and the covering on the back surface 5b side. The light shielding member 8a having a predetermined area provided between the light shielding unit 8 and the light shielding means 8 may be configured by the light shielding member 8a including the covering portion 7 that covers the back surface 5b side of the solar cell unit cell 5. It is possible to configure a simple screen unit 2.

  In addition, the roll screen device 1 according to the present invention is configured such that the solar cell unit cell 5 is an amorphous silicon solar cell, thereby reducing the thickness of the solar cell unit cell 5 as much as possible and reducing the weight. A highly flexible screen 2 can be manufactured.

  Further, by forming the covering portion 7 of the screen portion 2 with a vinyl chloride resin, the highly flexible screen portion 2 can be manufactured.

  13 and 14 show a second embodiment of the roll screen device 1. In the first embodiment, the configuration in which the screen unit 2 is stored by being wound around the winding pipe 24 in the holding unit 3 has been described. However, in the present embodiment, the configuration of the screen unit 2 and the storage thereof are described. Is different from the first embodiment.

  The screen unit 2 is composed of a plurality (six in the illustrated example) of structural bodies 2a, 2a. Each structure 2a, 2a ... is formed as a rectangular plate-shaped member. The screen portion 2 is integrally configured by connecting the long side portions of the respective structural bodies 2a, 2a... By connecting means such as a hinge or a flexible film. Thereby, the screen part 2 is comprised so that it can be bent with the connection part of the structure 2a as a base point. In particular, a method in which the solar battery unit cells 5 are covered with a laminate film and the resin film between the solar battery unit cells 5 is configured to be highly flexible is desirable, and easily has excellent durability and waterproofness. It can be.

  Each structure 2a, 2a ... is comprised by covering the surface 5a, 5b of the both sides of the solar cell unit cell 5 with the coating | coated part 7, similarly to 1st Embodiment. Each of the structural bodies 2a, 2a... Has one solar battery unit cell 5 built therein. In the second embodiment, since it is not necessary to give the solar cell unit cell 5 flexibility in particular, in addition to those having flexibility such as amorphous type and dye-sensitized type, single crystal silicon type, polycrystalline silicon Type crystalline silicon solar electronic devices, Group 3 to 5 compound semiconductor solar electronic devices such as gallium arsenide and indium phosphorus, Group 2 to 6 compound semiconductor solar electronic devices such as cadmium tellurium and copper indium selenide, etc. A hard type can also be used, and those hybrid elements can also be used.

  A through hole 31 penetrating in the thickness direction is formed at each longitudinal end of each of the structural bodies 2a, 2a. A support string 32 wound around a take-up pipe 24 provided in the holding unit 3 is inserted into the through hole 31. One end portion of the support string 32 is wound around the winding pipe 24 in the holding portion 3, and the other end portion is fixed to the structure 2 a constituting the lower end of the screen portion 2.

  A light shielding means 8 (light shielding member 8a) is provided on the back surface of each component 2a, 2a ... (the outer surface of the covering portion 7b of the back surface 5b opposite to the power generation surface 5a of the solar cell unit cell 5). The light shielding means 8 is the same as in the first embodiment.

  The holding part 3 has a pull cord as an operation member 26 for operating the screen part 2 as in the first embodiment. One end of the pull cord is wound around a winding pipe 24 in the holding unit 3. In the pull cord and the support string 32, the winding direction with respect to the winding pipe 24 is reversed. Accordingly, when the portion of the pull cord wound around the winding pipe 24 is pulled out from the holding portion 3 by pulling the pull cord, the support string 32 is wound around the winding pipe 24 in conjunction with this.

  When the support cord 32 is wound around the take-up pipe 24 by pulling the pull cord, the end portion of the support cord 32 is fixed to the lower end portion of the screen portion 2. Lift up. Then, as shown in FIG. 14, the screen portion 2 is folded while the lower end portion thereof is raised by bending the connecting portions of the respective structural bodies 2 a, 2 a.

  As described above, when the lower end of the screen unit 2 rises to a position near the holding unit 3, the screen unit 2 is completely folded (unused) at a position below the holding unit 3. . In the first embodiment, the screen unit 2 is wound into the holding unit 3 and is in the storage state. However, in the present embodiment, a state folded outside the holding unit 3 is referred to as a storage state.

  According to the roll screen device 1 according to the second embodiment, the screen unit 2 is used by dividing the screen unit 2 into a plurality of structural bodies 2a, 2a,. The state can be changed between the state and the storage state.

  Other configurations of the present embodiment are substantially the same as those of the first embodiment, and elements common to the first embodiment are denoted by common reference numerals and description thereof is omitted. Also in this embodiment, there exists an effect similar to 1st Embodiment.

  In addition, this invention is not restricted to said embodiment, A various deformation | transformation or change is possible.

  For example, in the above-described embodiment, an example in which an amorphous silicon type is used for the solar cell unit cell 5 is shown. However, the solar cell unit cell 5 is not limited to this, and a highly flexible solar cell such as a dye-sensitized type or an organic thin film type. May be applied to the present invention.

  In said embodiment, although the example which comprised the coating | coated part 7 of the screen part 2 with the vinyl chloride resin was shown, ETFE, PVC, an acrylic resin, an olefin resin excellent in a weather resistance and flexibility, You may comprise the coating | coated part 7 with thermoplastic resins, such as PET and a thermoplastic elastomer.

  In the first embodiment, the example in which the winding pipe 24 is configured to wind the screen portion 2 by the urging force of the coil spring has been described. However, the winding pipe 24 is rotated using an electric motor or the like. By doing so, you may comprise so that the screen part 2 may be wound up.

  In the above embodiment, the pull cord wound around the take-up pipe 24 is illustrated as the operation member 26 of the take-up mechanism 12, but is not limited thereto. For example, an annular ball chain wound around the winding pipe 24, a resin belt, a braided string, or the like can be used as the operation member 26.

  In the above embodiment, an example in which the light is completely blocked by the light blocking means has been described, but the present invention is not limited to this. The light shielding according to the present invention is not only a case where light is completely blocked, but also a concept that allows some light transmission. That is, the light shielding means includes, for example, light that passes through the back side of the screen portion 2 from a portion (hole portion) penetrating in the thickness direction provided in the solar cell unit cell 5 without a solar unit cell. Allow the same amount of light to pass.

  That is, the covering portion 7 has a portion that overlaps with the solar battery unit cell 5 and a portion that does not overlap, and there is a large difference in light passing through both. More specifically, when the covering portion 7 is made of a transparent resin, the portion where the covering portion 7 overlaps the solar cell unit cell 5 (the portion to be covered) is because the solar cell unit cell 5 blocks light. In the portion that does not transmit light and does not overlap with the solar cell unit cell 5, almost no light is transmitted because there is no solar cell unit cell 5.

  For this reason, when this screen part 2 is seen from the back side, that is, the indoor side, the part where the covering part 7 overlaps the solar battery unit cell 5 does not feel dazzling, but the part which does not overlap the solar battery unit cell 5 is more It feels strong and dazzling. Due to such a difference in transmitted light, the user inside the room feels uncomfortable and reduces visual stability. This phenomenon becomes more conspicuous, especially when the solar cell unit cell is configured by arranging a plurality of unit units, since the non-overlapping portions increase.

  For this reason, the light-shielding means according to the present invention is such that only the portion (the non-overlapping portion) where the covering portion 7 does not cover the solar cell unit cell 5 in order to reduce such transmitted light. May be provided. At this time, the light shielding means has a transmittance that is comparable to the light passing through the portion of the solar cell unit cell 5 where the light shielding means is not provided, or a hole formed in the solar cell unit cell 5 ( You may use the light-shielding member in which the hole similar to a hole part was formed.

  As described above, the light shielding in the present invention means that the difference in transmitted light is reduced to a level that does not cause a sense of incongruity to the user on the indoor side, and the same level of light as the light that passes through the solar cell unit cell 5. It is a concept that includes the ability to allow passage.

  Examples of the present invention will be described below. However, the present invention is not limited to the following examples.

Example 1
In the first embodiment described above, a roll screen device in which the screen unit 2 has the cross-sectional structure illustrated in FIG. The screen unit 2 of the roll screen device according to the first embodiment includes an amorphous silicon type solar cell unit cell 5 composed of eight unit units 5c, and both surfaces thereof are covered with a covering unit 7 together with a sealing material 6. It is constituted by. Transparent vinyl chloride resin was adopted for the covering portion 7.

  Further, a film-like light shielding member 8a as a light shielding means 8 was attached to the entire surface of the covering portion 7b on the back surface 5b side of the solar battery unit cell 5 using a polyester-based adhesive. The size of the screen unit 2 is 920 mm wide × 1730 mm long. Various design printing was applied to the light shielding member 8a as the design layer 9, and a transparent protective film was attached to the design layer by this printing to form the protection layer 10.

  The roll screen device according to Example 1 configured as described above was attached to the ceiling of an indoor window, and a power generation test was performed with the power generation surface 5a of the solar cell unit cell 5 facing outdoors. As a result, the roll screen device according to Example 1 was able to reliably perform desired power generation by the solar cell unit cell 5 of the screen unit 2.

  In addition, when the degree of light shielding was confirmed from the rear surface side on the screen unit 2 of Example 1 indoors, the difference in transmitted light that the outdoor light transmitted through the screen unit 2 is on the indoor side by the light shielding by the light shielding member 8a. It was visually confirmed that the visual stability was ensured by reducing it to a level at which the user does not feel uncomfortable.

(Example 2)
In the first embodiment described above, a roll screen device in which the screen portion 2 has the cross-sectional structure illustrated in FIG. In Example 2, the screen part 2 was configured with the same dimensions using the same solar cell unit cell 5, sealing material 6 and covering part 7 as in Example 1. The second embodiment is different from the first embodiment in that the light shielding member 8a is provided between the back surface 5b of the solar battery unit cell 5 and the covering portion 7b on the back surface 5b side.

  About Example 2 comprised in this way, the electric power generation test was done on the same conditions as Example 1. FIG. As a result, the roll screen device according to Example 2 was able to reliably perform desired power generation by the solar cell unit cell 5 of the screen unit 2.

  In addition, when the degree of light shielding is confirmed indoors on the screen portion 2 from the back side, the difference in transmitted light that the outdoor light passes through the screen portion 2 due to the light shielding by the light shielding member 8a is uncomfortable to the user inside the room. It was confirmed by visual observation that the visual stability was ensured by reducing the level to a level at which no occurrence occurred.

(Example 3)
In the first embodiment, a roll screen device in which the screen unit 2 has the cross-sectional structure illustrated in FIG. In Example 3, the screen unit 2 was configured with the same dimensions using the same solar cell unit cell 5, sealing material 6, and covering unit 7 as in Example 1. However, the configuration of the covering portion 7b on the back surface 5b side of the solar battery unit cell 5 is different from that of the first embodiment. In this covering portion 7b, 1% by weight of titanium oxide is blended so that light can be reflected and absorbed to constitute the light shielding means 8.

  About Example 3 comprised in this way, the electric power generation test was done on the same conditions as Example 1,2. As a result, the roll screen device according to Example 3 was able to reliably perform desired power generation by the solar cell unit cell 5 of the screen unit 2.

  In addition, when the degree of light shielding is confirmed indoors on the screen portion 2 from the back side, the difference in transmitted light that the outdoor light passes through the screen portion 2 due to the light shielding by the covering portion 7b as the light shielding means 8 is placed indoors. It was confirmed by visual observation that the visual stability was ensured by reducing the level to a level at which the user does not feel uncomfortable.

  DESCRIPTION OF SYMBOLS 1 ... Roll screen apparatus, 2 ... Screen part, 2a ... Structure of screen part, 3 ... Holding part, 4 ... Anchor part, 5 ... Solar cell unit cell, 5a ... Power generation surface, 5b ... Back surface of solar cell unit cell, 5c: Unit unit, 6: Sealing material, 7: Covering part, 8: Shading means, 8a ... Shading member, 9 ... Design layer, 10 ... Protective layer, 11 ... Holding part body, 11a ... Opening part, 12 ... Winding Take-up mechanism, 15 ... mounting member, 16 ... retaining hole, 21 ... frame, 22 ... side plate, 23 ... support shaft, 24 ... take-up pipe, 24a ... fitting groove, 25 ... locking means, 26 ... operating member, 26a ... Puller, 27 ... Clutch spring, 28 ... Stopper case, 29 ... Winding part, 30 ... Recess, 31 ... Through hole, 32 ... Support string, 33 ... Coil spring, 34 ... Locking member

Claims (6)

In a roll screen device having a screen portion configured in a sheet shape and a holding portion that holds the screen portion in a usable state and a storage state so that the state can be changed.
The screen unit includes a solar cell unit cell and a covering unit that covers both sides of the solar cell unit cell,
A light shielding means is provided on the back side opposite to the power generation surface of the solar cell unit cell ,
The light-shielding means is a light-shielding member having a predetermined area provided on the covering portion on the back surface side of the solar cell unit cell, and the light-shielding member is configured to cover the entire covering portion provided on the back surface side of the solar cell unit cell. A roll screen device. The roll screen device according to claim 1, wherein the light shielding member is configured by a fiber base material or a resin base material . The roll screen device according to claim 1, wherein the light shielding member has a light shielding ratio of 40 to 95% . The roll screen apparatus of any one of Claim 1 to 3 which has a design layer provided in the outer surface of the said light-shielding member .   The roll screen device according to any one of claims 1 to 4, wherein the solar cell unit cell is an amorphous silicon solar cell.   The roll screen device according to any one of claims 1 to 5, wherein the covering portion is made of a vinyl chloride resin.

Images