JP2011184902A - Blind shutter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blind shutter device which takes in sufficient solar radiation light in winter. <P>SOLUTION: The blind shutter device includes a plurality of slats 22. A mirror-finished surface 22A is provided on the concave side of the slat 22, and a light diffusion surface 22B is provided on the convex side. The opening of the slat 22 is automatically adjusted. During the daytime in winter, the slat 22 is horizontally held with the mirror finished surface 22A placed on the top side, and during the daytime in summer, the slat 22 is placed in an inclined state with the light diffusion surface 22B facing the outdoor side. At night, the slat is vertically held with the mirror finished surface 22A facing the indoor side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a blind shutter device.

  Patent Document 1 below discloses a blind shutter device including a shutter curtain configured by a plurality of slats. Specifically, the blind shutter device includes a capture member, a cam body, and a control plate, and is configured to rotate the slat by a predetermined angle to allow ventilation when the ventilation switch of the controller is pressed. There is a feature in that.

JP 2005-061138 A

  However, in the case of the above prior art, although ventilation is possible, the solar light is insufficiently captured in winter, and there is room for improvement in this respect.

  In view of the above facts, an object of the present invention is to provide a blind shutter device capable of sufficiently capturing sunlight in winter.

  The blind shutter device according to the present invention as set forth in claim 1 is installed on the upper edge side of an opening of a building and has an apparatus main body having a winding shaft therein, and is wound around the winding shaft, each of which has a strip shape. And a plurality of slats arranged in parallel with each other in the height direction of the opening and connected to each other, and a slat opening / closing mechanism for rotating the slats around the spindle. And at least one of the plurality of slats has a mirror surface on one side.

  A blind shutter device according to a second aspect of the present invention is the blind shutter device according to the first aspect of the invention, wherein the slat having the mirror surface is turned around the support shaft so that the mirror surface is directed to the upper edge side of the opening. It is characterized in that it can be held at a horizontal position and a vertical position where the mirror surface is opposed to the opening.

  A blind shutter device according to a third aspect of the present invention is the blind shutter device according to the second aspect, wherein the one surface of the slat is a concave surface.

  A blind shutter device according to a fourth aspect of the present invention is the blind shutter device according to any one of the first to third aspects, wherein the slat having the mirror surface is opposite to the one surface on which the mirror surface is provided. It has a light diffusing surface that diffuses and reflects light on the surface.

  A blind shutter device according to a fifth aspect of the present invention is the blind shutter device according to any one of the first to fourth aspects, wherein the driving means for applying a driving force to the slat opening / closing mechanism, date information and time And control means for driving the driving means so that the reflected light reflected by the mirror surface is incident on the indoor ceiling side based on the information.

  According to a sixth aspect of the present invention, there is provided a blind shutter device according to the fourth aspect of the present invention, wherein the light diffusing surface is based on driving means for applying a driving force to the slat opening / closing mechanism and date information and time information. And control means for driving the drive means so as to reflect the sunlight and shield the sunlight.

  A blind shutter device according to a seventh aspect of the present invention is the blind shutter device according to the fifth aspect, wherein the mirror surface is based on an incident angle detecting means for detecting an incident angle of solar light and a detection result of the incident angle detecting means. And control means for driving the drive means so that the reflected light reflected by the light is incident on the indoor ceiling side.

  According to the first aspect of the present invention, the take-up shaft is disposed inside the apparatus main body installed on the upper edge side of the opening of the building. When the winding shaft rotates in the winding direction, a plurality of slats are wound around the winding shaft, and conversely, when the winding shaft rotates in the feeding direction, the plurality of slats are fed out from the winding shaft.

  Here, in the present invention, since at least one of the plurality of slats has a mirror surface on one side, the slat is rotated around the support shaft by the slat opening / closing mechanism so that the mirror surface is arranged on the upper surface side. be able to. For this reason, for example, if the mirror surface is directed upward during the daytime in winter, the sunlight is reflected by the mirror surface to irradiate the ceiling in the room. If it does in this way, sunlight can fully be taken in indoors also in the winter when there is little sunshine time. This also has the advantage of saving electricity costs.

  According to the second aspect of the present invention, the slat can be held in the horizontal position and the vertical position. When the slat is held in a horizontal position, the mirror surface faces the upper edge of the opening of the building, which is effective for capturing sunlight in winter. On the other hand, when the slat is held in a vertical position, the mirror surface faces the opening of the building, so that the illumination light emitted from the room light is reflected on the mirror surface without leaking the room light to the outside at night. You can return to For this reason, indoor brightness can be secured even with weak illumination light.

  According to the third aspect of the present invention, since one surface on the mirror surface side of the slat is a concave surface, it is possible to collect sunlight in the winter in the concave surface and irradiate the ceiling in the room.

  According to the fourth aspect of the present invention, since the light diffusing surface is provided on the surface opposite to the mirror surface side of the slat, for example, when the sunlight in summer is strong and it is desired to shield the solar radiation, the light diffusing surface It can be used to adjust the angle to an angle that can block sunlight. If the mirror surface is used for solar radiation shielding, the reflected light may be inserted into the neighbor. However, in the present invention, since the light diffusion surface is provided on the surface opposite to the mirror surface side, such a situation can be avoided.

  According to the fifth aspect of the present invention, the control means drives the drive means based on the date information and the time information. For this reason, the slat opening / closing mechanism is operated, and the opening degree of the slat is adjusted so that the reflected light reflected by the mirror surface enters the indoor ceiling.

  According to the sixth aspect of the present invention, the control means drives the drive means based on the date information and the time information. For this reason, the slat opening / closing mechanism is operated, and the opening degree of the slat is adjusted so that the sunlight is reflected by the light diffusing surface and the sunlight is blocked.

  According to the seventh aspect of the present invention, when the incident angle of the sunlight is detected by the incident angle detecting means, the control means drives the driving means based on the detected incident angle. For this reason, the slat opening / closing mechanism is operated, and the opening degree of the slat is adjusted so that the reflected light reflected by the mirror surface enters the indoor ceiling.

  As described above, the blind shutter device according to the first aspect of the present invention has an excellent effect that sunlight in winter can be sufficiently captured.

  The blind shutter device according to the second aspect of the present invention has an excellent effect of being able to sufficiently capture sunlight in winter and to save energy at night.

  The blind shutter device according to the third aspect of the present invention has an excellent effect that the room can be effectively brightened.

  The blind shutter device according to the fourth aspect of the present invention has an excellent effect that the solar radiation shielding effect can be improved in a manner in which the neighboring house is not affected in the summer when the sunlight is strong.

  The blind shutter device according to the fifth aspect of the present invention has an excellent effect of being able to automatically capture sunlight in winter based on date information and time information.

  According to the sixth aspect of the present invention, the blind shutter device according to the present invention has an excellent effect that the sunlight can be automatically shielded in the summer based on the date information and the time information.

  The blind shutter device according to the seventh aspect of the present invention has an excellent effect that the sunlight can be automatically taken into the room automatically in accordance with the incident angle of the sunlight in winter.

It is a schematic elevation view which shows the usage condition of the daytime of the winter of the blind shutter device which concerns on this embodiment. It is a schematic elevation view corresponding to FIG. 1 which shows the use aspect of the daytime of the summer of the blind shutter apparatus which concerns on this embodiment. It is a schematic elevation view corresponding to FIG. 1 which shows the night use aspect of the blind shutter apparatus which concerns on this embodiment. It is a front view of the blind shutter device concerning this embodiment. It is a principal part expansion perspective view which shows the principal part of the slat opening / closing mechanism of the blind shutter apparatus which concerns on this embodiment. (A) is a top view which shows the case where a rack bar exists in a retracted position, (B) is a top view which shows the case where a rack bar exists in an advance position. It is a block diagram which shows the system outline | summary of the blind shutter apparatus which concerns on this embodiment. It is a flowchart for demonstrating how to use the blind shutter apparatus which concerns on this embodiment. (A) is a perspective view of a blind shutter showing a usage mode at night, (B) is a perspective view of a blind shutter showing a usage mode during daytime in winter, and (C) shows a usage mode during daytime in summer. It is a perspective view of a blind shutter. It is a schematic side view which expands and shows the usage condition of a blind shutter in the daytime of winter. It is a schematic side view which expands and shows the usage condition of a blind shutter in the daytime of summer. It is a schematic side view which expands and shows the usage condition of a blind shutter at night.

  Hereinafter, an embodiment of a blind shutter device according to the present invention will be described with reference to FIGS.

<Concept of Blind Shutter Device 10 According to this Embodiment>
First, the concept of the blind shutter device 10 according to the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 to 3, the blind shutter device 10 according to the present embodiment is installed on the upper edge side of the window 14 of a building 12 such as a house, used as a blind during the day, and as a shutter at night. It is like that.

  The blind shutter device 10 has an apparatus main body 16 disposed on the upper edge side of the window 14 and a winding shaft 18 (see FIG. 4) disposed in the apparatus main body 16 so as to be wound and fed out. And a blind shutter 20 having a fixed portion. The blind shutter 20 is configured by connecting a plurality of slats 22 each formed in a strip shape in the winding and feeding directions. Each slat 22 is configured to be rotatable, and the opening degree of the blind shutter 20 is adjusted (changed) by rotating a plurality of slats 22 synchronously.

  Each slat 22 is formed so that a cross-sectional shape when cut in a direction orthogonal to the longitudinal direction is an elongated elliptical shape, and both surfaces are formed by convex curved surfaces. One surface of the slat 22 is a mirror surface 22A, and the surface of the slat 22 opposite to the mirror surface 22A is a light diffusion surface 22B. The mirror surface 22A is provided by mirror-finishing one surface of the slat 22. The light diffusion surface 22B is provided by matte finishing the surface of the slat 22 opposite to the mirror surface 22A. However, as long as the method functions as the mirror surface 22A, a method other than the mirror finishing may be used. Further, as long as the method functions as the light diffusion surface 22B, a method other than the matte finishing may be used. The structure of the opening adjustment mechanism of the slat 22 will be described later.

  FIG. 1 shows how the blind shutter device 10 is used during the daytime in winter. At this time, the slat 22 is adjusted to an opening (about 90 degrees) that is substantially horizontal. Thereby, the direct sunlight P which is weak in winter is reflected by the slats 22, and the reflected light Q is guided to the ceiling surface 26 of the living room 24 to brighten the entire room.

  On the other hand, FIG. 2 shows how the blind shutter device 10 is used during the daytime in the summer. At this time, the slat 22 is adjusted to an opening degree (about 45 degrees to about 60 degrees) inclined by a predetermined angle so that the lower edge side of the slat is positioned on the outdoor side of the building with respect to the upper edge side of the slat. As a result, the strong direct sunlight P in the summer is reflected by the slats 22 but becomes diffused light R, so that strong sunlight is not directly incident on the living room 24, and strong reflected light is not irradiated to neighboring houses. It has become.

  Further, FIG. 3 shows a night usage mode of the blind shutter device 10. At this time, the slat 22 is adjusted to an opening degree (about 0 degree) that is perpendicular to the floor surface 28. Thereby, since the illumination light S by the night lighting fixture 30 is reflected by the mirror surface 22A and returns into the living room 24 throughout the year, the interior of the living room 24 can be brightened even with weak illumination light S.

<Detailed Structure of Blind Shutter Device 10 According to the Present Embodiment>
As shown in FIG. 4, the blind shutter device 10 includes a box-shaped device main body portion 16 having a window opening / closing direction (opening width direction) as a longitudinal direction at the upper end portion of the window. Elevating means such as an elevating motor 32 (see FIG. 7) and a take-up shaft 18 are accommodated inside the apparatus main body 16. In addition, a pair of left and right guide rails 34 extend in parallel from both longitudinal ends of the apparatus main body 16. A blind shutter 20 including a plurality of slats 22 each formed in a strip shape is supported between the guide rail portions 34 so as to be movable up and down.

  FIG. 5 shows a main part of a slat opening / closing mechanism 36 for opening / closing the slat 22 of the blind shutter 20 described above. As shown in this figure, a straight bar-like support member 38 is erected in the guide rail portion 34 along the longitudinal direction thereof. The support member 38 supports both ends of a rack bar 40 that is formed in a U shape in a side view.

  More specifically, the rack bar 40 includes a first rack portion 42 disposed along the longitudinal direction of the guide rail portion 34 and parallel to each other in the indoor direction from both longitudinal end portions of the first rack portion 42. And a pair of bent upper and lower second rack portions 44. First rack teeth 42 </ b> A are formed on the first rack portion 42, and second rack teeth 44 </ b> A are formed on the second rack portion 44. The first rack teeth 42A mesh with a first pinion gear 48 fixed to the output shaft of the first drive motor 46 as drive means via a reduction mechanism (not shown). Further, the second rack teeth 44A mesh with a second pinion gear 52 fixed to the output shaft of the second drive motor 50 as drive means. Further, the second rack portion 44 is formed with a long hole 54 whose longitudinal direction is the indoor / outdoor direction. The hole width of the long hole 54 is set to be slightly larger than the shaft outer diameter of the support member 38.

  Therefore, when the first drive motor 46 is driven to rotate, the rack bar 40 moves up and down along the support member 38, and when the second drive motor 50 is driven to rotate, as shown in FIGS. 6 (A) and 6 (B). The rack bar 40 is configured to move indoors and outdoors within the length of the long hole 54. The guide rail portion 34 is provided with guide means (not shown) for guiding the movement of the rack bar 40.

  On the other hand, the blind shutter 20 is composed of a plurality of slats 22 each formed in a strip shape. The configuration of each slat 22 is as described above, and is formed in a convex curved shape as a whole. The concave side is a mirror surface 22A, and the convex side is a light diffusion surface 22B.

  Each slat 22 includes a rod 56 as a support shaft. The rod 56 is formed in a straight bar shape, and is disposed so as to penetrate the central portion of the slat 22. In addition, the structure which makes the rod 56 longer than the longitudinal direction dimension of the slat 22 penetrate in the center part of the slat 22 may be taken, or the structure which makes a short rod project coaxially from the center of the both ends of the longitudinal direction of the slat 22 May be taken.

  Angle adjusting gears 58 that mesh with the first rack teeth 42A are coaxially fixed to both ends of the rod 56 in the longitudinal direction. Therefore, when the angle adjustment gear 58 rotates, the rod 56 and the slat 22 rotate together (that is, by the same rotation angle in the same rotation direction). Note that the outer diameter of the angle adjusting gear 58 is preferably set to be equal to or less than the thickness of the slat 22 because the slat 22 is wound around the winding shaft 18 in layers.

  If it supplements about the structure of a raising / lowering means, as FIG. 5 shows, the some slat 22 is connected by the tape-made resin 60 which is elongate and flexible. A cylindrical holding portion 62 is integrally formed on the tape 60 in accordance with the pitch of the rod 56, and the rod 56 is inserted into the holding portion 62 so as to be relatively rotatable. In addition, rectangular locking holes 64 are formed in the tape 60 at a predetermined pitch. A lifting motor 32 (see FIG. 4) is connected to the shaft end side of the winding shaft 18 stored in the apparatus main body 16 via a speed reduction mechanism (not shown). The take-up shaft 18 is provided with a sprocket (not shown) coaxially. When the lifting motor 32 is driven to rotate, the sprocket is rotated integrally with the take-up shaft 18 in the same direction by the same rotation amount. It has become. While the locking hole 64 formed in the tape 60 is engaged with the teeth of the sprocket, the tape 60 is taken up and fed out of the sprocket.

  Next, a system outline of the blind shutter device 10 will be described. As shown in FIG. 7, the blind shutter device 10 includes a control device 66 as control means. An incident angle detection sensor 68 as an incident angle detecting means for detecting the incident angle of the solar light is connected to the input side of the control device 66, and the incident angle of the solar light is constantly or every predetermined time. Is output. The incident angle detection sensor 68 is installed on the guide rail portion 34 of the blind shutter device 10 or the like. Further, the lifting / lowering motor 32, the first driving motor 46 and the second driving motor 50 are connected to the output side of the control device 66, and the operations of the lifting / lowering motor 32, the first driving motor 46 and the second driving motor 50 are connected. Is controlling.

(Action / Effect)
Next, the operation and effect of this embodiment will be described.

  FIG. 8 shows an operational flow of the blind shutter device 10 according to the present embodiment. Hereinafter, description will be made based on this flowchart. First, in step 100, when automatic control of the blind shutter device 10 is instructed using a remote controller (remote controller), in step 102, the direction and control angle of the blind shutter 20 are determined according to the season. In other words, the control device 66 includes a clock and acquires current date and time information. Of these, if it is determined from the date information that the current season is winter, it is a situation where the sunlight is weak and it is desired to capture solar radiation with the blind shutter 20, so the flow proceeds to step 104 and subsequent steps. On the other hand, if it is determined in step 102 that the current season is the summer, it is a situation where the sunlight is strong and it is desired to block the sunlight with the blind shutter 20, so the flow proceeds to step 114 and subsequent steps.

  If it is determined that it is winter, first in step 104, the elevating motor 32 is driven to rotate forward, and the blind shutter 20 is fed out from the winding shaft 18. When the blind shutter 20 is extended to the lowest position, the limit switch is turned on and automatically stopped. When the amount of the blind shutter 20 extended until the entire window 14 is covered is known in advance, the blind shutter 20 is automatically stopped at the lowest position by controlling the driving speed of the elevating motor 32. May be. Further, the blind shutter 20 is forcibly stopped even at an intermediate position when a stop button on the remote controller is pressed. Further, when the elevating motor 32 is driven, the rack bar 40 is held at the retracted position shown in FIG.

  When the blind shutter 20 is lowered to the lowest position, the direction of the slats 22 is in the state shown in FIG. 9A, and the concave surface provided with the mirror surface 22A faces the indoor (indoor) side, and the light diffusion is performed. The convex side provided with the surface 22B faces the outdoors.

  Next, the process proceeds to step 106, and the incident angle information of the solar radiation detected by the incident angle detection sensor 68 is captured. The CPU of the control device 66 calculates the solar altitude when the incident angle detection information is fetched. Then, the process proceeds to step 108, and the opening degree of the slat 22 of the blind shutter 20 is adjusted according to the solar altitude. Specifically, since the flow after step 104 is in the winter season, the slat 22 is kept in a substantially horizontal state (see FIG. 9B). Therefore, in step 108, the slat 22 in the vertical state is rotated 90 degrees clockwise as viewed in the state shown in FIG.

  Specifically, the second drive motor 50 is driven forward by a predetermined amount from the state shown in FIG. Thereby, the rack bar 40 is moved (moved forward) in the outdoor direction. When the support member 38 is positioned at the start end of the long hole 54, the second drive motor 50 is stopped. As a result, the first rack teeth 42A of the first rack portion 42 of the rack bar 40 are pressed against the angle adjusting gear 58 of the slats 22 and become engaged. Next, the first drive motor 46 is driven forward by a predetermined amount. The rotational speed of the first drive motor 46 at this time is the rotational speed until the opening degree of the slat 22 is changed from 0 degree to 90 degrees. As a result, as shown in FIGS. 9B and 10, the slat 22 is in a substantially horizontal state.

  Further, based on the solar radiation angle information captured in step 106, the first drive motor 46 is driven forward or reversely, and an angle that is optimal for reflecting solar radiation to the ceiling surface 26 with respect to the solar radiation angle at that time. The opening of the slat 22 is finely adjusted every predetermined time (for example, every 10 minutes) within a range of ± α degrees (for example, ± 20 degrees). However, it may be controlled to fix the opening degree of the slat 22 to 90 degrees when it is determined in step 102 that it is winter.

  By automatically adjusting the opening degree of the slats 22 in this way, as shown in FIG. 10, the sunlight reflected by the slats 22 is reflected by the ceiling surface 26 and taken into the room in addition to the sky light (step) 110). In particular, since the concave surface of the slat 22 of the present embodiment is a mirror surface 22A, weak sunlight in the daytime in winter can be effectively taken into the room, and the room light is not turned on when reading or performing light work. This saves energy (step 112).

  On the other hand, if it is determined in step 102 that it is summer, first, in step 114, the elevating motor 32 is driven to rotate forward, and the blind shutter 20 is fed from the take-up shaft 18. When the blind shutter 20 is extended to the lowest position, the limit switch is turned on and automatically stopped. When the lifting motor 32 is driven, the rack bar 40 is held at the retracted position shown in FIG.

  When the blind shutter 20 is lowered to the lowest position, the direction of the slats 22 is in the state shown in FIG. 9A, and the concave surface provided with the mirror surface 22A faces the indoor (indoor) side, and the light diffusion is performed. The convex side provided with the surface 22B faces the outdoors.

  Next, the process proceeds to step 116, where the incident angle information of the solar light detected by the incident angle detection sensor 68 is taken in, and the solar altitude is calculated by the CPU. Then, the process proceeds to step 118, and the opening degree of the slat 22 of the blind shutter 20 is adjusted in accordance with the solar altitude. Specifically, since the flow after step 114 is in the summer, the slat 22 is in a state where the convex surface (light diffusing surface 22B) faces the outdoor side and is inclined at a predetermined angle (see FIG. 9C). Kept. Therefore, in step 118, the slats 22 in the vertical state are rotated clockwise within a range of 30 degrees to 60 degrees as viewed in the state shown in FIG.

  Specifically, the second drive motor 50 is driven forward by a predetermined amount from the state shown in FIG. Thereby, the rack bar 40 is moved (moved forward) in the outdoor direction. When the support member 38 is positioned at the start end of the long hole 54, the second drive motor 50 is stopped. As a result, the first rack teeth 42A of the first rack portion 42 of the rack bar 40 are pressed against the angle adjusting gear 58 of the slats 22 and become engaged. Next, the first drive motor 46 is driven forward by a predetermined amount. At this time, the rotation speed of the first drive motor 46 is set to a rotation speed corresponding to an angle determined according to the solar altitude when the opening degree of the slat 22 is in a range of 0 to 30 degrees to 60 degrees. . Accordingly, as shown in FIGS. 9C and 12, the slat 22 is inclined at a predetermined angle so that the light diffusion surface 22B faces the outdoor side and the lower edge of the slat is on the outdoor side of the upper edge of the slat. It becomes a state.

  By automatically adjusting the opening degree of the slat 22 in this way, as shown in FIG. 9C and FIG. 11, the direct sunlight shielded by the slat 22 does not enter the room and the sky light is taken into the room. (Step 120). As a result, an increase in the room temperature can be suppressed, the operating time of the air conditioner can be reduced, and energy saving is achieved (step 122). In addition, since the convex surface of the slat 22 of the present embodiment is the light diffusion surface 22B, there is no problem that strong reflected light is inserted into the neighbor.

  On the other hand, for nighttime throughout the year, the flow after step 124 is executed. That is, in step 124, the slat 22 is fully closed (see FIG. 9A and FIG. 12). In this case, since the mirror surface 22A of the slat 22 is directed to the indoor side, the illumination light from the lighting fixture 30 reflected by the mirror surface 22A is returned to the room, and the reflected light remains in the room in addition to the illumination light (step 126). ). By preventing the illumination light from leaking to the outside in this way, the room can be brightened, and the brightness can be maintained even with a small amount of lighting, saving energy (step 128).

  In the above-described embodiment, the concave surfaces of all the slats 22 are mirror surfaces 22A. However, the present invention is not limited to this, and the concave surface of at least one slat may be a mirror surface. Even in this case, an effect corresponding to that can be obtained. For example, the mirror surface 22 </ b> A may be set only on the upper part of the blind shutter 10. Even in this case, since the concave surface of the slat 22 located near the ceiling surface 26 is the mirror surface 22A, the effect of capturing sunlight in winter is high.

  Moreover, in this embodiment mentioned above, although the slat 22 shown in FIG. 1 comprised from the combination of convex surfaces and the slat 22 shown in FIG. 10 comprised by the convex surface and the concave surface were demonstrated, not only this but a convex surface It may be a slat with a half-moon shaped cross section composed of a flat surface.

10 Blind shutter device 12 Building 14 Window (opening)
DESCRIPTION OF SYMBOLS 16 Apparatus main body part 18 Winding shaft 20 Blind shutter 22 Slat 22A Mirror surface 22B Light diffusing surface 26 Ceiling surface 36 Slat opening / closing mechanism 46 1st drive motor (drive means)
50 Second drive motor (drive means)
56 Rod (support shaft)
58 Angle adjustment gear (slat opening / closing mechanism)
66 Control device (control means)
68 Incident angle detection sensor (incident angle detection means)

Claims (7)

An apparatus main body installed on the upper edge side of the opening of the building and having a winding shaft inside;
A plurality of slats wound around the winding shaft, each formed in a strip shape and rotatable around the support shaft, juxtaposed in the height direction of the opening and interconnected;
A slat opening / closing mechanism for rotating the slat around a support shaft;
Have
Further, at least one of the plurality of slats has a mirror surface on one side,
Blind shutter device. The slat having the mirror surface can be held in a horizontal position in which the mirror surface is directed toward the upper edge side of the opening and a vertical position in which the mirror surface is opposed to the opening by being rotated around the support shaft.
The blind shutter device according to claim 1. The one surface of the slat is a concave surface,
The blind shutter device according to claim 2. The slat having the mirror surface has a light diffusion surface that diffuses and reflects light on the surface opposite to the one surface provided with the mirror surface.
The blind shutter device according to any one of claims 1 to 3, wherein the blind shutter device is provided. Driving means for applying a driving force to the slat opening and closing mechanism;
Control means for driving the drive means based on the date information and time information so that the reflected light reflected by the mirror surface is incident on the indoor ceiling side;
The blind shutter device according to claim 1, wherein the blind shutter device is provided. Driving means for applying a driving force to the slat opening and closing mechanism;
Based on date information and time information, control means for driving the driving means so as to reflect the sunlight and shield the sunlight from the light diffusing surface;
The blind shutter device according to claim 4, further comprising: An incident angle detecting means for detecting an incident angle of solar light;
Control means for driving the drive means based on the detection result of the incident angle detection means so that the reflected light reflected by the mirror surface is incident on the indoor ceiling side;
The blind shutter device according to claim 5, further comprising:

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