Roll screen device

Abstract

To provide a roll screen device with improved heat insulation properties.SOLUTION: A roll screen device 10 includes a sheet-like screen section 12, guide rails 22 provided at both left and right ends of the screen section 12, a bottom rail 18 provided at a lower end of the screen section 12, and end tabs 30 attached to both left and right ends of the bottom rail 18 to close a gap between the bottom rail 18 and each guide rail 22.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a roll screen device, and more particularly to a roll screen device provided with solar cells.

Background Art

[0002] Conventionally, a roll screen device having solar cells provided in a screen portion has been known (see, for example, Patent Document 1).

[0003] In the roll screen device disclosed in Patent Document 1, guide rails for guiding the raising and lowering of the screen portion are arranged at both left and right ends of the screen portion. This guide rail is configured to sandwich the end portion of the screen portion. By arranging the guide rail, heat transfer from the lateral side of the screen portion can be prevented, so that the heat insulation property can be improved.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a roll screen device, a bottom rail is usually provided at the lower end of the screen portion. In the roll screen device disclosed in Patent Document 1, since this bottom rail is not guided by the guide rail, a gap may occur between the bottom rail and the guide rail. Heat transfer may occur through this gap, and there is a risk of deterioration of the heat insulation property.

[0006] The present disclosure has been made in view of such problems, and an object thereof is to provide a roll screen device with improved heat insulation property.

Means for Solving the Problems

[0007] In order to solve the above problems, a roll screen device according to an aspect of the present invention includes a screen portion configured in a sheet shape, guide rails provided at both left and right ends of the screen portion in the left-right direction, a bottom rail provided at the lower end of the screen portion, and end tabs attached to both left and right ends of the bottom rail in the left-right direction for closing the gap between the bottom rail and the guide rail.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0009] Hereinafter, the present invention will be described with reference to the drawings based on preferred embodiments. The following configurations are for the purpose of exemplification for understanding the present disclosure, and the scope of the present disclosure is determined only by the appended claims. The same or equivalent components and members shown in each drawing are denoted by the same reference numerals, and repeated explanations are omitted as appropriate. Also, the dimensions of the members in each drawing are shown enlarged or reduced as appropriate for easy understanding. In addition, some of the members that are not important for explaining the embodiments in each drawing are omitted from the display. Further, when terms indicating directions such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. are used in the present disclosure, they mean the directions in the posture when the roll screen device is attached to a building.

[0010] The roll screen device 10 shown in FIG. 1 is attached to and used in an opening of a building. In the example shown in FIG. 1, an opening of the building is formed by frame members such as vertical frames (vertical frames) 101 and 102 extending in the vertical direction and horizontal frames (horizontal frames) 103 and 104 extending in the horizontal direction.

[0011] A glass panel (not shown) is arranged on the outdoor side of the opening of the building. The glass panel may be attached to the vertical members 101, 102 and the flush members 103, 104 by predetermined supporting means such as a structural sealant. The roll screen device 10 is arranged on the indoor side of the opening of the building.

[0012] The roll screen device 10 includes a screen part 12 and a holding part 14 for suspending and holding the screen part 12.

[0013] The holding part 14 includes a winding drum 16 for winding up the screen part 12 and an upper frame 15 provided above the winding drum 16. The upper frame 15 is a member having a U-shaped cross section perpendicular to the longitudinal direction, and is arranged so that the longitudinal direction is parallel to the longitudinal direction of the winding drum 16. The upper frame 15 is fixed to the upper flush member 103 via a bracket 13. The upper frame 15 may be fixed to a blind box. The upper frame 15 may be a hollow square bar. Support members 17 are provided at both left and right ends of the upper frame 15. The winding drum 16 is supported by the upper frame 15 via the support members 17. A tubular motor (not shown) for rotating the winding drum 16 is arranged inside the winding drum 16. By driving the tubular motor, the screen part 12 can be raised and lowered.

[0014] Inside the upper frame 15, a motor control board (not shown) for controlling the tubular motor, an AC / DC conversion board (not shown) for converting the AC voltage input from a power outlet via a power line into a DC voltage, etc. are accommodated.

[0015] The screen part 12 is formed of a flexible rectangular sheet-like body. The upper end part in the longitudinal direction of the screen part 12 is connected to the winding drum 16, and a bottom rail 18 is provided at the lower end part. The bottom rail 18 applies a force in the direction of pulling down the screen part 12 and exerts an action of applying tension to the screen part 12 to enhance flatness.

[0016] The roll screen device 10 according to this embodiment further includes a pair of guide rails 22 that guide the lifting of the screen unit 12 at both left and right (horizontal) ends of the screen unit 12. The guide rails 22 are members that extend in the vertical direction. As shown in FIG. 2, the guide rails 22 are configured to sandwich the left and right ends of the screen unit 12. A recess 22a that extends in the vertical direction is formed in the guide rail 22, and the left and right ends of the screen unit 12 are inserted into the recess 22a. When the screen unit 12 moves up and down, the ends of the screen unit 12 slide within the recess 22a of the guide rail 22. The gap between the guide rail 22 and the screen unit 12 may be filled with mohair or the like. By providing the guide rail 22, heat transfer from the side of the screen unit 12 can be prevented, so the heat insulation can be improved. Also, light leakage from the side of the screen unit 12 can be prevented, so the light shielding property can be improved. Furthermore, an effect of suppressing wrinkles in the screen unit 12 can also be expected.

[0017] The screen unit 12 includes a fabric layer and a plurality of solar cell cells 20 provided on the fabric layer. The fabric layer may be formed of fibers or plastics (synthetic resins) such as polypropylene, polyethylene, and polyester. In another embodiment, the screen unit 12 may be a skeleton type that does not include a fabric layer and includes, for example, an ETFE film.

[0018] In the embodiment shown in FIG. 1, a plurality of square solar cell cells 20 in plan view are arranged in a matrix, but the size, shape, and arrangement method of the solar cell cells 20 are not particularly limited, and free sizes, shapes, and arrangements are possible. For example, a plurality of rectangular solar cell cells in plan view may be arranged side by side in the vertical direction of the screen unit 12. Generally, matrix arrangement is frequently used in crystalline silicon solar cell cells. In another embodiment, it may be in a state where perovskite or the like is applied to the entire light-receiving surface or printed. The solar cell cell 20 is configured to utilize the photovoltaic effect and convert light energy into electric power.

[0019] Each solar cell 20 is formed with a positive and a negative extraction electrode. The positive extraction electrodes formed on each solar cell 20 are connected to each other by a positive electrode ribbon wire (not shown). Similarly, the negative extraction electrodes formed on each solar cell 20 are connected to each other by a negative electrode ribbon wire (not shown). The plurality of solar cells 20 are thus connected to each other by the positive electrode ribbon wire and the negative electrode ribbon wire. The wiring form can be arranged regardless of series or parallel, and here, it is not limited thereto.

[0020] At the lower end of the screen portion 12, a positive electrode lead wire 23 and a negative electrode lead wire 24 are respectively connected to the positive electrode ribbon wire and the negative electrode ribbon wire. The positive electrode lead wire 23 and the negative electrode lead wire 24 are drawn out to the outside from the lower end of the screen portion 12. The lower end of the screen portion 12 is recessed only into the bottom rail 18, and the bottom frame 18 is suspended by a holding member provided at the lower end of the screen portion 12. As shown in FIG. 3, the positive electrode lead wire 23 and the negative electrode lead wire 24 are connected to the control board 26 within the bottom frame 18.

[0021] As shown in FIG. 3, the bottom rail 18 may be a hollow rod-shaped body. The outer cross-section perpendicular to the longitudinal direction of the bottom rail 18 may be rectangular or circular. The hollow rod-shaped body may be configured by combining two divided members, for example, by fitting.

[0022] A control board 26 for controlling the power generated by the solar cell 20 may be accommodated within the bottom rail 18.

[0023] The control board 26 may include an MPPT (Maximum Power Point Tracking) control board, a charge and discharge control board, and a power supply board. These control boards control the power input via the positive electrode lead wire 23 and the negative electrode lead wire 24.

[0024] The MPPT control board is a control board for following the maximum operating point during power generation in real time according to changes in weather conditions. The charge and discharge control board is a control board for controlling the charging and discharging of the power generated by the solar cell 20. The power supply board is a board for controlling the supply of power to the outside via the power supply port.

[0025] The bottom rail 18 may be provided with a power supply port 28 for outputting power to the outside. The power supply port 28 may be, for example, a USB port or a DC jack. By inserting the connector of the charging cable into the power supply port 28, it is possible to charge a portable terminal such as a smartphone.

[0026] Since the bottom rail 18 is formed thicker than the screen portion 12, it cannot be inserted into the recess 22a of the guide rail 22. Further, since the bottom rail 18 moves up and down between the pair of guide rails 22, it is formed shorter than the distance between the pair of guide rails 22. Therefore, a gap 32 may be formed between the bottom rail 18 and the guide rail 22. If there is such a gap 32, heat transfer from the gap 32 may occur, and the heat insulation property may be reduced.

[0027] Therefore, in the roll screen device 10 according to the present embodiment, as shown in FIG. 3, end tabs 30 for closing the gap 32 between the bottom rail 18 and the guide rail 22 are attached to both left and right ends of the bottom rail 18 in the lateral direction. A part of the end tab 30 is sandwiched by the guide rail 22. That is, a part of the end tab 30 is inserted into the recess 22a of the guide rail 22. When the bottom rail 18 moves up and down as the screen portion 12 moves up and down, a part of the end tab 30 slides in the recess 22a of the guide rail 22.

[0028] By providing the end tabs 30 at both ends of the bottom rail 18 and closing the gap 32, heat transfer from the gap 32 can be prevented, so that the heat insulation property can be improved. Further, since light leakage from the gap 32 can be prevented, the light shielding property can be improved.

[0029] In FIG. 3, the end tab 30 has an L-shaped cross-section, but the shape is not particularly limited. Also, the method of attaching to the bottom rail 18 is not particularly limited, and it may be screwed or attached by an adhesive or the like. In the embodiment shown in FIG. 3, the end tab 30 and the bottom rail 18 are separate members, but the end tab 30 may be integrally formed with the end cover of the bottom rail 18, or the end tab 30 may be integrally formed with the bottom rail 18.

[0030] Since a part of the end tab 30 is sandwiched by the guide rail 22, the rotation and out-of-plane movement of the bottom rail 18 are restricted. Thereby, the heat insulation and light shielding properties can be further improved. Also, since the rotation and movement of the bottom rail 18 are restricted, it becomes easy to insert and remove the connector with respect to the power supply port 28.

[0031] Furthermore, according to the roll screen device 10 according to the present embodiment, by providing the end tabs 30 at both ends of the bottom rail 18, in the on-site installation work, it is not necessary to bring the bottom rail 18 as close as possible to the guide rail 22 to fill the gap 32, and the workability can be improved.

[0032] As described above, the present invention has been described based on the embodiments. This embodiment is an example, and it is understood by those skilled in the art that various modifications and changes are possible within the scope of the claims of the present invention, and such modifications and changes are also within the scope of the claims of the present invention. Therefore, the descriptions and drawings in this specification should be treated as illustrative rather than restrictive.

Explanation of Reference Numerals

[0033] 10 roll screen device, 12 screen part, 14 holding part, 15 upper frame, 16 winding drum, 18 bottom rail, 20 solar cell, 22 guide rail, 26 control board, 28 power supply port, 30 end tab.

Claims

1. A screen portion configured in a sheet shape, Guide rails provided at both left and right ends of the screen portion in the horizontal direction, A bottom rail provided at the lower end of the screen portion, End tabs attached to both left and right ends of the bottom rail in the horizontal direction to close the gap between the bottom rail and the guide rail, A roll screen device comprising the above.

2. The roll screen device according to claim 1, wherein a part of the end tab is sandwiched by the guide rail.

3. Solar cells provided on the screen portion, A power supply port provided on the bottom rail for outputting the power generated by the solar cells to the outside, The roll screen device according to claim 2, further comprising the above.

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