JP2006338915A - Sun tracking type natural illumination device and natural illumination system of building using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sun tracking type natural illumination device capable of radiating reflection light of the sun in a certain direction by surely synchronizing it with the race of the sun with a simple device without needing a complicated control means, and resultantly capable of effectively improving a light environment of a building; and to provide a natural illumination system of a building using it. <P>SOLUTION: This sun tracking type natural illumination device is provided with: a rotating shaft 3 installed in parallel with the rotational axis of the earth (earth axis); driving means 4 and 5 for rotating the rotating shaft 3 at a speed synchronized with the race of the sun; and a mirror member 6 mounted to the rotating shaft 3 at a tilt angle of 45°±2° and rotating integrally with the rotating shaft 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a solar tracking type daylighting apparatus that tracks the sun and reflects the light in a certain direction, and a daylighting system for a building using the same.

Spaces that are not directly irradiated with sunlight are formed between adjacent buildings or below the voids formed in the buildings.
For this reason, in order to improve the light environment in the space, various solar tracking daylighting devices for reflecting sunlight while following the operation of the sun and irradiating sunlight to the originally shaded part are provided. Has been developed.

  For example, in Patent Document 1 below, a vertical rotating member is suspended on a support member by a horizontal rotating device having a drive motor driven by a control means, and a horizontal shaft is provided at the lower end of the vertical rotating member. In addition, there has been proposed a solar lighting device in which a reflecting mirror is provided on the horizontal axis so as to be rotatable by a vertical rotating device having a drive motor driven by a control device.

  The daylighting device having the above configuration tracks the sun by the control device, and drives and controls the drive motor of the horizontal rotation device to rotate the vertical rotation member in the horizontal direction by a predetermined angle so that the reflecting mirror faces the sun. At the same time, the drive motor of the vertical rotation device is driven and controlled to rotate by a predetermined angle in the vertical direction, and the reflecting mirror is tilted by a predetermined angle with respect to the horizontal plane so that the reflecting mirror reflects sunlight directly below. It is a thing.

  According to the above daylighting apparatus, the sunlight is always reflected by the reflector regardless of the altitude and direction of the sun by changing the vertical and horizontal rotation angles of the reflector every moment as the sun travels. It is said that it is possible to perform daylighting by reflecting directly below.

Patent Document 2 below discloses a daylighting apparatus for buildings using this type of solar tracking type daylighting apparatus.
Also in this daylighting apparatus, similar to the daylighting apparatus described in Patent Document 1, an azimuth angle control unit and an altitude angle control unit, a pulse motor driven and controlled by each of these control units, and an inclination angle by these pulse motors. A solar light tracking type reflection device having a movable reflecting mirror that can be changed as appropriate is used.

In this daylighting apparatus, the solar light tracking type reflection device is provided on the roof of the building on the north side of the shadow portion, and a fixed reflecting mirror is provided on the wall surface of the building that causes the shadow portion.
According to the above daylighting device, an arithmetic control unit such as a microcomputer calculates the altitude angle, the azimuth angle, etc. of the movable reflector based on the preset data of the sun in the south, the tilt angle data, etc. Based on the obtained results, the control unit drives each pulse motor to set the azimuth angle and altitude angle of the movable reflector, and reflects sunlight from the movable reflector to the opposing fixed reflector. Thus, the illumination state of the shadow portion can be changed by the reflected light from the fixed reflecting mirror.
JP-A-3-163703 JP-A-61-172108

  However, in the conventional solar tracking daylighting apparatus and the building daylighting system using the same, the sun position is divided into two components, an azimuth angle and an altitude angle, and each is pulsed by the control means. A drive device such as a motor is driven and controlled to rotate the reflecting mirror around each drive shaft.

  For this reason, the device of the solar tracking type lighting device becomes complicated, and particularly when it is necessary to provide a large number of solar tracking type lighting devices in order to obtain a wide success area, the drive control becomes complicated as a whole, There was a problem that the installation cost of the entire apparatus would be extremely high.

  This invention has been made in view of such circumstances, without requiring complicated control means, it is possible to irradiate the reflected light of the sun in a certain direction reliably synchronized with the operation of the sun by a simple device, As a result, it is an object of the present invention to provide a solar tracking daylighting device and a building daylighting system using the solar tracking daylighting device that can effectively improve the light environment of the building.

  In order to solve the above problems, a solar tracking type daylighting device according to the present invention as set forth in claim 1 is a rotating shaft installed in parallel to the earth's rotation axis (ground axis), and the rotation axis is used as a solar operation. Drive means for rotating at a synchronized speed, and a mirror member attached at an inclination angle of 45 ° ± 2 ° with respect to the rotating shaft and rotating integrally with the rotating shaft. is there.

  According to a second aspect of the present invention, in the first aspect of the invention, the mirror member is based on the tilt angle, and at least the maximum solar declination before and after the tilt angle. The angle of inclination is provided to be adjustable in an angle range of ½ of the angle range between the minimum value and the sun declination of each day based on the rotation of each day of the rotating shaft. The solar declination adjusting mechanism is provided so as to be inclined by an angle that is ½ of the change in the above.

  Furthermore, in the invention described in claim 3, the solar declination adjusting mechanism described in claim 2 converts a rotation of the rotating shaft of each day into a linear motion of a constant stroke, and the conversion mechanism and A crank rod connected to each of the mirror members in a pair of pairs. The crank rod causes the mirror member to be rotated by one of the constant declinations output from the conversion mechanism. The length is set to be inclined by an angle of / 2, and the connecting position is set.

  Next, the daylighting system for a building according to the present invention as set forth in claim 4 is configured such that the sun according to any one of claims 1 to 3 is placed on a roof on the north side of the building sandwiching a space in which a shadow portion is formed. The tracking-type daylighting device has the rotation axis positioned parallel to the rotation axis of the earth, the mirror member is arranged facing the sun, and is a wall surface on the south side of the building sandwiching the space, and the rotation axis A reflection member for irradiating sunlight reflected by the mirror member toward a desired location in the space is provided at a position on the extended line.

  In addition, in the invention described in claim 5, in the invention described in claim 4, the solar tracking type daylighting device provided on the roof on the north side of the building includes a plurality of mirror members in the horizontal direction and the vertical direction. And the one driving means rotates the plurality of mirror members.

  In the solar-tracking daylighting device according to any one of claims 1 to 3, as shown in FIG. 6A, the rotation axis R is installed so as to be parallel to the rotation axis P of the earth at the installation location. At the same time, when the mirror member M attached to the rotation axis R at an inclination angle of 45 ° is directed toward the sun, the incident angle from the sun to the mirror member M is 45 °. FIG. 6 illustrates the case where the solar tracking daylighting apparatus is installed at a location of 43 ° north latitude.

  Then, when the rotation axis R is rotated at a speed synchronized with the operation of the sun by the driving means D, the mirror member M also rotates integrally with the rotation axis R. As a result, the reflected light from the mirror member M is always shown in FIG. Irradiated parallel to the rotation axis R as indicated by the middle arrow.

  For this reason, according to the solar tracking type daylighting device, by arranging a reflecting member, a condensing member such as a parabolic mirror or a lens, or a photovoltaic power generation panel on the downward extension line of the rotation axis R, it is complicated. Without requiring a control means, it is possible to always irradiate the reflected light of the sun to the reflecting mirror or the like in a synchronized manner with a simple device without fail.

  Since the sun rotates around the rotation axis P of the earth relative to 360 ° in 24 hours, in order to rotate the rotation axis R at a speed synchronized with the operation of the sun, the rotation axis R is 15 ° / What is necessary is just to rotate at the rotational speed of time. At this time, the rotary shaft R may be continuously driven to rotate at the rotational speed for 24 hours, or after rotating at the rotational speed from the sunrise position to the sunset position, And may be rotated again at the above rotational speed from the time of sunrise.

  In addition, the inclination angle of the rotating shaft attached to the mirror member is set to 45 ° ± 2 ° because the rotating shaft is accurately placed in parallel with the rotation axis of the earth and the mirror member is accurately 45 with respect to the rotating shaft. Although it is most preferable to mount at 45 °, in consideration of the installation error of the rotating shaft or the mounting error of the mirror member, ± 2 ° with respect to the 45 ° so that the reflected light is irradiated substantially in parallel with the rotating shaft R. Is allowed.

  By the way, as shown in FIGS. 6A to 6C, the earth revolves around the sun once a year while rotating around its rotation axis P once a day. At this time, since the rotation axis P has an inclination of about 23 ° 27 ′ with respect to the revolution axis, the angle between the sunlight and the equatorial plane of the earth (solar declination) is accompanied by the revolution of the earth. What was 0 ° at the time of spring / autumn in the same figure (a) becomes + 23 ° 27 'in the summer solstice shown in the same figure (b), and -23 ° in the winter solstice shown in the same figure (c). 27 '.

  Therefore, as in the invention described in claim 2 or 3, the mirror member M is mounted at approximately 45 ° with respect to the rotation axis with reference to the spring / autumn time, and at least before and after the inclination angle. The tilt angle is adjusted within an angle range of 1/2 between the maximum value (+ 23 ° 27 ') and the minimum value (-23 ° 27') of the solar declination, that is, at least ± 11.75 °. If possible, the mirror member M is inclined by an angle corresponding to the change of the solar declination of the day based on the rotation of the rotation axis R every day by the solar declination adjustment mechanism, Without using a separate driving means, it is possible to irradiate the reflected light from the mirror member M through the year parallel to the rotation axis R toward the south side through the rotation of the daily rotation axis R.

Therefore, according to the daylighting system for a building according to claim 4 or 5, the solar tracking type daylighting device is placed on the rooftop on the north side of the building sandwiching the space where the shadow portion is formed, and the rotation axis is the earth. Since the mirror member is positioned so as to be parallel to the rotation axis and the mirror member is directed toward the sun, sunlight is always reflected on the extension line of the rotation shaft by the mirror member.
As a result, the reflected light can be irradiated toward a desired location in the space by the reflecting member provided on the south wall surface of the building sandwiching the space.

  At this time, by providing a plurality of the reflecting members and appropriately selecting an inclination angle or the like of each reflecting member, it is possible to obtain desired lighting throughout the day at various locations in the space that is originally a shadow portion. Therefore, it is possible to greatly improve the light environment in a high-rise building in which voids or the like are formed, or a building in which two buildings are constructed close to each other.

  In addition, the solar tracking type daylighting device has a simple structure and can reliably reflect sunlight on the extension line of the rotation axis only by rotating the rotation axis at the operating speed of the sun. In the above daylighting system, when the desired location requiring daylight becomes wide, as in the invention according to claim 5, a number of mirror members are arranged in the horizontal and vertical directions as the solar tracking daylighting device. If one of the mirror members is rotated by a single driving means, it is excellent in economic efficiency, and the light can be easily applied to the above-mentioned wide range by only operating one driving means. Can be irradiated.

1 to 4 show an embodiment of a solar tracking type daylighting apparatus according to the present invention, and reference numeral 1 in the figure denotes a support base placed at an arbitrary installation location.
As shown in FIGS. 1 and 2, an attachment member 2 of the lighting device body is provided at the upper end portion of the support base 1 through a pivot 1a so as to be swingable so that an inclination angle with respect to the vertical can be adjusted. It has been. And the rotating shaft 3 is rotatably supported by the upper part of this attachment member 2. As shown in FIG.

  Further, driving means including a stepping motor 4 and a reduction gear device 5 is attached to the back side in the swing direction of the attachment member 2, and an output gear 5 a of the reduction gear device 5 is a base end portion of the rotating shaft 3. Is engaged with a drive gear 3a integrated with each other. Here, the stepping motor 4 and the reduction gear device 5 are set to rotate the rotary shaft 3 at a rotation speed of 15 ° / hour, that is, a rotation speed of one rotation per day.

  On the other hand, the mirror member 6 is provided at the tip of the rotating shaft 3 with an inclination angle of 45 ° with respect to the rotating shaft 3. The mirror member 6 is connected to the tip of the rotary shaft 3 via the pivot 7 at the center of the back surface 6a, so that the tilt angle with respect to the rotary shaft 3 can be adjusted. In addition, a crank wheel 9 having 365 teeth 8 formed on the outer periphery thereof is rotatably provided at an intermediate portion in the longitudinal direction of the rotating shaft 3.

  A crank rod 10 is provided between the crank wheel 9 and the position of the mirror member 6 spaced from the pivot 7. Here, the crank rod 10 is connected to the crank wheel 9 and the mirror member 6 via pivots 11a and 11b disposed at both ends, respectively, by a pair of turns.

Further, a cylinder member 12 protruding in a radial direction from the rotary shaft 3 is integrally fixed to the outer periphery of the rotary shaft 3 positioned between the crank wheel 9 and the mounting member 2.
A piston rod 13 provided parallel to the rotary shaft 3 and projecting from both ends of the cylinder member 12 is moved to the cylinder member 12 in the axial direction with its tip 13 a facing the teeth 8 of the crank wheel 9. It is provided freely.

  The piston rod 13 is urged toward the mounting member 2 by a spring (schematically drawn outside in FIGS. 3 and 4) 14 provided inside the cylinder member 12. Inside, a stopper is provided for locking the movement of the piston rod 13 at a position where the base end portion 13 b of the piston rod 13 is close to the facing surface 2 a of the mounting member 2.

  On the other hand, a piston driving cam 15 protruding from the opposing surface 2a of the mounting member 2 is provided. As a result, when the rotating shaft 3 makes one rotation, the base end portion 13b of the piston rod 13 is pushed back to the left in the figure by the cam 14, and the tip end portion 13a ratchet-types the crank wheel 9 into one tooth 8. It is designed to rotate by the corresponding angle.

  The cylinder member 12, the piston rod 13, the spring 14, and the cam 15 constitute a conversion mechanism that converts one rotation of the rotary shaft 3 into a linear motion with a constant stroke. Further, the length dimension of the crank rod 10 and the length dimension between the pivot shafts 7 and 10 are such that when the crank wheel 9 is rotated by one tooth 8 by one stroke of the piston rod 13, the mirror member 6 is The dimension is set to be inclined by an angle (23 ° 27 ′ / 365) that is 1/2 of the change in sun declination.

  As a result, the cylinder member 12, the piston rod 13, the spring 14, the cam 15, the crank wheel 9 and the crank rod 10 constitute a solar declination adjusting mechanism in this solar tracking daylighting device.

  In the sun-tracking daylighting device having the above configuration, the rotating shaft 3 is installed so as to be parallel to the rotation axis of the earth at the installation location, and the mirror member 6 attached to the rotating shaft 3 at an inclination angle of 45 ° is provided. If it arrange | positions toward the sun, as shown to Fig.6 (a), the incident angle from the sun to the mirror member 6 will be 45 degrees.

  When the rotating shaft 3 is rotated at a speed synchronized with the operation of the sun by the driving means including the stepping motor 4 and the reduction gear device 5, the mirror member 6 is also rotated integrally with the rotating shaft 3, and as a result, the mirror member is always mirrored. Reflected light from the member 6 is irradiated in parallel with the rotation axis 3.

  As a result, according to the solar tracking type daylighting apparatus, a complicated control means is provided by arranging a condensing member such as a reflecting mirror, a parabolic mirror or a lens, or a solar power generation panel on the extension line of the rotating shaft 3. Therefore, it is possible to always irradiate the reflected light of the sun to the reflecting mirror or the like by surely synchronizing with the operation of the sun by a simple device.

  Further, when the rotating shaft 3 rotates once a day, the cylinder member 12 also rotates together with the rotating shaft 3 once a day. In this process, as shown in FIG. 4, the base end portion 13 b of the piston rod 13 is pressed against the urging force of the spring 14 by the cam 15, and the crank wheel 9 corresponds to the one tooth 8. Rotate only the angle. Thus, the mirror rod 6 connected to the crank wheel 9 causes the mirror member 6 to be additionally inclined by an angle that is ½ of the sun declination angle change of each day.

  Thereby, the mirror member 6 can always be kept at an angle of 45 ° with respect to the incident angle from the sun throughout the year. Therefore, the rotation of the rotating shaft 3 is utilized every day without using a separate driving means. Thus, the reflected light from the mirror member 6 can always be irradiated in parallel with the rotation axis 3.

Note that the solar declination adjustment mechanism in the solar tracking type daylighting device is not limited to the one shown in FIGS. 1 to 4, and various forms of solar declination adjustment mechanisms as shown in FIG. 5 can also be used. .
In other words, in the solar declination adjusting mechanism provided in the solar tracking type daylighting device, a pair of mounting members 21 that support the rotating shaft 3 are arranged opposite to each other on the base 20 of the daylighting device body. In addition, a worm wheel 22 is provided between the mounting members 21 so as to be rotatable around an axis 24.

  The worm wheel 22 has 365 teeth 23 formed on the outer periphery. A worm 25 that meshes with the teeth 23 of the worm wheel 22 is fixed to the outer periphery of the rotating shaft 3 facing the worm wheel 22. Here, the worm 25 is formed to rotate the worm wheel 22 by one tooth 23 when the rotation shaft 3 makes one rotation.

  On the other hand, the mounting member 21 on the mirror member 6 side is provided with a slider shaft 26 that protrudes toward the mirror member 6 in parallel with the rotation shaft 3. A crank slider 27 is movably provided on the slider shaft 26, and a mirror slider 28 is movably provided on the rotary shaft 3. The crank slider 27 and the mirror slider 28 are integrally formed by a connecting member 29. It is connected.

  The worm wheel 22 and the crank slider 27 are connected to each other by a crank rod 30 that is turned at both ends and is a pair. Similarly, the mirror slider 28 and the mirror member 6 are connected to each other by a crank rod 31 that is turned at both ends and is a pair.

  Even with the solar tracking type daylighting device having the solar declination adjusting mechanism having the above-described configuration, when the rotation shaft 3 makes one rotation per day, the worm 25 also makes one rotation, thereby causing the worm wheel 22 to rotate around the axis 24 by 1/365. It rotates by the amount of rotation. As a result, the crank rod 30 connected to the worm wheel 22 moves the crank slider 27 and the mirror slider 28 by a fixed stroke. It can be tilted by an extra half angle.

  Therefore, the solar tracking type daylighting device can obtain the same effects as those shown in FIGS. 1 to 4, and the solar declination adjustment mechanism always keeps the mirror member 6 in the sun throughout the year. 45 ° with respect to the incident angle from the light source, and the reflected light from the mirror member 6 is always rotated using the rotation of the daily rotating shaft 3 without using any separate driving means. Irradiation can be performed parallel to the axis 3.

7 to 9 show an embodiment of a daylighting system for a building according to the present invention, and the same components as those shown in FIGS. Simplify.
In FIG. 7, the code | symbol 30 is a building in which the void (space in which a shadow part is formed) 31 was formed in the center part.

  And the solar tracking type lighting device 33 is installed in the roof 32 of the building part 30a of the north side which pinches | interposes the void 31 of this building 30 in between. The building portion 30b located on the south side of the void 31 of the building 30 is provided with a staircase 34 along the void 31. A plurality of wall surfaces 34a facing the void 31 of the staircase 34 (in the figure, Reflecting mirrors (reflecting members) 35a to 35d having four stages in the vertical direction are attached.

  Here, as shown in FIGS. 7 to 9, the sun tracking type daylighting device 33 is provided with four sets of 16 solar tracking type daylighting devices 36 in the vertical and horizontal directions. Are attached to a grid-like mounting base composed of four column members 37 erected in the horizontal direction and horizontal members 38 that connect them in the horizontal direction at equal intervals in the vertical and horizontal directions.

  The sun-tracking daylighting device 36 is the same as that shown in FIGS. 1 to 4 except that each does not have the stepping motor 4 and the reduction gear device 5 and the shape of the support base 1 is different. The rotating shaft 3 is positioned parallel to the rotating shaft of the earth, and the mounting member 39 is fixed to the column member 37 of the mounting base with the mirror member 6 facing the sun side. ing.

  A stepping motor 40 and a cyclo reducer 41 that is connected to the output shaft of the stepping motor 40 and decelerates the number of rotations are attached to the lower part between the central column members 37. Further, above the cyclo reducer 41, rotation transmission devices 42 and 43 each having a built-in miter gear combined with a bevel gear having a conical angle of 90 ° and the same number of teeth are attached to each horizontal member 38. It has been.

  Here, the rotation transmission device 42 is provided with three constant-speed output shafts for one input shaft, and the rotation transmission device 43 has two outputs for one input shaft. A shaft is provided. Further, the rotation transmission device 43 is connected to the rotation shaft 3 of the solar light tracking type lighting device 36 attached to the adjacent column member 37. As a result, the output shaft 41a of the cyclo reducer 41 is connected to the rotating shaft 3 of all the solar tracking daylighting devices 36 at a constant speed by the transmission shaft 44 via the rotational transmission devices 42 and 43.

  On the other hand, the four reflecting mirrors 35a to 35d on the wall surface 34a facing the void 31 side of the staircase 34 are arranged on an extension line of the rotating shaft 3 of the solar light tracking type lighting device 36 provided in the four steps. Has been. Thereby, the sunlight reflected by the mirror member 6 of the solar tracking type daylighting device 36 of each stage is irradiated toward the reflecting mirrors 35a to 35d of each stage.

  Of the reflecting mirrors 35a to 35d, the uppermost reflecting mirror 35a, the second reflecting mirror 35b, and the third reflecting mirror 35c are respectively located on the third floor of the north-side building portion 30a, which is originally a shadow portion, The inclination angle is set so that light is emitted to the floor by the light shelves 45 provided on the second floor and the first floor. Here, the light shelf irradiates reflected light in an arbitrary direction using the refraction of the prism. Further, the lowermost reflecting mirror 35 d is set so as to irradiate the reflected light from the mirror member 6 of the sun tracking type daylighting device 36 toward the bottom of the void 31.

  According to the lighting system of the building 30 having the above-described configuration, the solar tracking type lighting device 33 is connected to each solar tracking type on the roof 32 of the north side building portion 30a sandwiching the void 31 where the shadow portion is formed. Since the rotating shaft 3 of the daylighting device 36 is positioned so as to be parallel to the rotating shaft of the earth, and the mirror member 6 is installed facing the sun side, sunlight is always transmitted to the rotating shaft 3 by the mirror member 6. Reflected on the extension line. Then, the reflected light is reflected by the reflecting mirrors 35a to 35d provided on the wall surface 34a of the staircase 34 of the south building part 30b with the void 31 therebetween, and the bottom of the void 31 and the void 31 that originally become the shadow portion. It can irradiate toward the 1st-3rd floor part which faces.

  As a result, desired light can be obtained all day at the bottom of the void 31 and the first to third floor portions facing the original, and the inclination angles of the reflecting mirrors 35a to 35d can be appropriately selected. Alternatively, by additionally installing a reflecting mirror, it is possible to obtain desired lighting throughout the day at various locations in the void 31 as well.

  Further, the rotating shaft 3 of the 16 sun tracking daylighting devices 36 is rotated synchronously by one stepping motor 40 and a cyclo reducer 41 by rotation transmission devices 42 and 43 and a transmission shaft 44 incorporating a miter gear. Since it can be driven, it is excellent in economic efficiency, and all mirror members 6 can be rotated in synchronism with the operation of the sun with high accuracy.

  In the above embodiment, the case where the building lighting system according to the present invention is applied only to the building 30 in which the void 31 is formed has been described. However, the present invention is not limited to this. For example, two buildings are close to each other. The same can be applied to a plurality of buildings constructed in this way.

It is a whole perspective view which shows one Embodiment of the sun tracking type daylighting apparatus of this invention. It is a perspective view of the principal part which shows the state which the solar tracking type daylighting device of FIG. 1 rotated 180 degrees. It is a schematic block diagram of FIG. It is a schematic block diagram which shows the state which the sun tracking type daylighting device of FIG. 3 rotated 180 degrees. It is a schematic block diagram which shows other embodiment of the solar declination adjustment mechanism of FIG. It is a figure which shows the relationship between the rotation axis of the earth at 43 degrees north latitude, the rotation axis of the sun tracking type daylighting device, and the incident angle of sunlight, (a) is the day of spring and autumn, (b) is the day of summer solstice, (c ) Is a diagram showing the day of the winter solstice. It is the schematic block diagram which looked at the longitudinal cross-section which shows one Embodiment of the lighting system of the building of this invention. It is a rear view which shows the solar tracking type daylighting device of FIG. It is a side view of FIG.

Explanation of symbols

3 Rotating shaft 4, 40 Stepping motor (drive means)
5. Reduction gear device (drive means)
6 Mirror member 9 Crank wheel 10, 30, 31 Crank rod 12 Cylinder member 13 Piston rod 14 Spring 15 Cam 22 Warm wheel 25 Warm 27, 28 Slider 30 Building 30a North building part 30b South building part 31 Void (shade part) Is formed space)
32 rooftop 33 solar tracking daylighting device 35a-35d reflecting mirror (reflecting member)
36 Solar tracking type lighting device 42 Cyclo reducer (driving means)
42, 43 Rotation transmission device 44 Transmission shaft D Driving means M Mirror member P Earth rotation axis R Rotation shaft

Claims (5)

  A rotating shaft installed parallel to the rotation axis of the earth, a driving means for rotating the rotating shaft at a speed synchronized with the operation of the sun, and an inclination angle of 45 ° ± 2 ° with respect to the rotating shaft A sun-tracking daylighting device comprising a mirror member that rotates integrally with the rotating shaft.   The mirror member is based on the tilt angle, and the tilt angle is at least a half of the angle range between the maximum and minimum sun declination around the tilt angle. And a solar declination adjusting mechanism that tilts the mirror member by an angle that is ½ of the change in solar declination on each day based on the rotation of the rotating shaft on each day. The solar tracking type daylighting device according to claim 1, wherein   The solar declination adjustment mechanism includes a conversion mechanism that converts the rotation of the rotating shaft of each day into a linear motion with a fixed stroke, and a crank rod that is coupled to the conversion mechanism and the mirror member in pairs. The crank rod is set to a length dimension and a connecting position for inclining the mirror member by an angle of ½ of the change in the solar declination of each day by the constant stroke output from the conversion mechanism. The solar tracking type daylighting device according to claim 2, wherein   The solar tracking daylighting device according to any one of claims 1 to 3, wherein the rotation axis is parallel to the rotation axis of the earth, on a roof on the north side of a building sandwiching a space where a shadow portion is formed The mirror member is arranged facing the sun side, and the sunlight reflected by the mirror member is placed on the south wall of the building sandwiching the space and on the extension line of the rotating shaft. A building daylighting system comprising a reflecting member for irradiating a desired location in a space.   The sun-tracking daylighting device provided on the roof on the north side of the building has a plurality of the mirror members in the horizontal direction and the vertical direction, and the one driving means rotationally drives the plurality of mirror members. The building daylighting system according to claim 4.

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