JP2009048785A - Sun tracking type sunlight illuminating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sun tracking type sunlight illuminating device capable of always irradiating reflected light of incident sunlight to an arbitrary position fixed in advance. <P>SOLUTION: The sun tracking type sunlight illuminating device includes a rotary shaft 3 rotatable around an axis arranged in parallel with the own rotating axis of the earth, a driving means 4 for making the rotary shaft 3 rotate at a speed synchronized with a movement of the sun, a driving arm 5 fixed on the rotary shaft, a mirror 6 coupled with the driving arm 5, and a mirror support arm 7 vertically fixed on the mirror 6. The mirror 6 is rotatably arranged on a tip of the driving arm 5, a guide member 10a is fixed on an imaginary circle S where a length between the axis line of the rotary shaft 3 and the rotating center 8 of the mirror is set to be a radius on the reference surface including the axis line of the rotary shaft 3 and the rotating center of the mirror 6, the mirror support arm 7 is connected with the guide members 10a, 12 and is movably supported in the extending direction of the same. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a solar tracking type daylighting apparatus capable of always reflecting incident sunlight toward a predetermined position while tracking the sun.

  Conventionally, for the purpose of irradiating sunlight, such as the bottom of a void formed inside a high-rise building, with the purpose of irradiating sunlight, the sunlight is reflected and irradiated while following the operation of the sun. Various sun tracking daylighting devices have been developed.

  In the following Patent Documents 1 and 2, the position of the sun is divided into two components of an azimuth angle and an altitude angle, and each is driven and controlled by a driving device such as a pulse motor by control means for tracking sunlight. Therefore, there has been proposed a solar lighting device or a solar tracking type lighting device in which a reflecting mirror is rotated around each drive axis to reflect sunlight directly below.

  However, in the above-described conventional solar lighting device and the like, the drive system including the control device is particularly complicated, and particularly when it is necessary to provide a large number of devices in order to obtain a wide lighting area, As a result, the drive control becomes complicated, and the installation cost of the entire apparatus becomes extremely high.

  Therefore, the inventors previously described in Patent Document 3 below, a rotating shaft installed in 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 the rotation described above. A sun-tracking daylighting device was proposed that includes a mirror member that is attached to the shaft at an inclination angle of 45 ° ± 2 ° and rotates integrally with the rotating shaft.

  According to the solar tracking type daylighting device having the above-described configuration, when the rotating shaft is set to be parallel to the rotation axis of the earth, and the mirror member attached to the rotating shaft at an inclination angle of 45 ° is directed to the sun, Since the incident angle from the sun to the mirror member is 45 °, the reflection from the mirror member rotating integrally with the rotary shaft by rotating the rotary shaft at a speed synchronized with the operation of the sun by the driving means. Light is always emitted parallel to the rotation axis.

For this reason, by placing a shadow part on the bottom of the void on the lower extension line of the rotating shaft, or by locating a reflecting mirror or the like and irradiating the reflected part with the reflected light. There is an advantage that it is possible to irradiate the reflected light of the sun at all times in synchronism with the operation of the sun by a simple device without requiring complicated control means.
JP-A-3-163703 JP-A-61-172108 JP 2006-338915 A

  However, the conventional solar tracking type daylighting apparatus is configured to reflect sunlight by a mirror member that rotates integrally with the rotating shaft and to irradiate the reflected light on the extended line of the rotating shaft at all times. Therefore, there is a problem that the installation position of the apparatus is restricted.

  On the other hand, in recent years, in addition to applications such as the irradiation of sunlight on the shaded part of the building described above, for large-scale condensing facilities such as condensing members such as parabolic mirrors and lenses, or photovoltaic panels. There has been an increasing demand for always reflecting sunlight intensively. However, in this type of application, it is often difficult to position the light collecting facility on the extension line of the rotation axis of the solar tracking daylighting device due to factors such as topography and installation location.

  The present invention has been made in view of such circumstances, and does not require complicated control means, and always reflects incident sunlight reflected light at an arbitrary predetermined position in synchronization with the operation of the sun. It is an object of the present invention to provide a sun-tracking daylighting device that can be irradiated.

  In order to solve the above-mentioned problems, a solar tracking type daylighting device according to the present invention as set forth in claim 1 is provided with a rotation shaft provided rotatably around an axis line arranged in parallel with the rotation axis of the earth, and the rotation Driving means for rotating the shaft at a speed synchronized with the operation of the sun, a driving arm having one end fixed to the rotating shaft and extending outward from the axis of the rotating shaft, and the other end of the driving arm And a mirror that is rotated about the rotation axis and reflects sunlight on the surface opposite to the rotation axis side, a mirror support arm fixed perpendicularly to the back surface of the mirror, and the mirror support A support member for supporting the arm, and a guide member for supporting the mirror support arm while guiding the bearing, and a bearing member is provided at the other end of the drive arm, and the guide member is attached to the support member. Guide member and above The mirror support arm is provided on a reference plane including the axis of the rotary shaft and the bearing member so as to be positioned on a virtual circle having a radius between the axis of the rotary shaft and the bearing member as a radius. One end of the mirror side is rotatably provided at the tip of the drive arm via the bearing member, and the other end is connected to the guide member and is movable in the extending direction of the mirror support arm. It is characterized by being supported by.

  According to a second aspect of the present invention, there is provided a sun-tracking daylighting device according to the present invention, comprising: a rotary shaft that is rotatably provided about an axis arranged in parallel with the rotation axis of the earth; A driving means for rotating at a synchronized speed, a driving arm having one end fixed to the rotating shaft and extending outward of the axis of the rotating shaft, and the rotation connected to the other end of the driving arm A mirror that rotates about the axis and reflects sunlight on the surface opposite to the rotation axis side, a mirror support arm that is fixed perpendicularly to the back surface of the mirror, and a support portion that supports the mirror support arm And a guide member that supports and supports the mirror support arm, the guide member is provided at the other end of the drive arm, and the bearing member is rotated with the bearing member at the support portion. Axis axis and above The mirror support arm is provided on a reference plane including a guide member so as to be positioned on a virtual circle having a radius between the axis of the rotation shaft and the guide member. One end portion is rotatably provided on the support portion via the bearing member, and the other end portion is coupled to the guide member, and is supported on the tip end portion of the drive arm so as to be movable in the extending direction of the mirror support arm. It is characterized by being.

  Furthermore, the invention according to claim 3 is the invention according to claim 1 or 2, wherein the angle between a line perpendicular to the axis of the rotation axis on the virtual circle and the drive arm is set to solar red. A seasonal adjustment member that can be adjusted in a range of ± 1/2 of the angular range due to the seasonal variation of the latitude is provided.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the drive arm is provided such that one end of the drive arm is pivotally adjustable on the rotary shaft via a pivot. The seasonal adjustment member is connected to the slide mechanism that converts the rotation of the drive means into a linear motion in the axial direction of the rotary shaft, and is connected to the slide mechanism and the drive arm. And a link mechanism that changes the angle of the drive arm with rotation.

  Furthermore, the invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the bearing member is a spherical bearing.

  In the invention according to any one of claims 1 to 5, the axis of the rotation axis is arranged in parallel with the rotation axis of the earth, and the reference includes the axis of the rotation axis, the rotation center of the guide member and the bearing member. An extension line to the mirror side of a line connecting the axis, the rotation center of the guide member and the bearing member in the planar direction from the axial direction of the surface to the outside of the mirror, that is, the axial direction, irradiates the sunlight. Install so that the orientation of the position you want. In addition, when the angle formed between the direction in which the sunlight is incident on the reference plane and the direction in which the sunlight is desired to be irradiated is θ, the diameter line perpendicular to the axis of the rotation axis in the circle in the reference plane Then, the guide member is positioned so that the angle formed by the mirror support arm is θ / 2.

  Then, when the mirror is directed to the sun side and the rotating shaft is rotated by the driving means at a speed synchronized with the operation of the sun, the mirror also rotates integrally through a driving arm fixed to the rotating shaft. As a result, sunlight incident parallel to the diameter line of the reference surface (strictly speaking, at the time of spring and autumn) is always in the above-mentioned direction by the mirror and twice the inclination angle of the reference surface with respect to the diameter line. Is reflected toward the position where it is desired to irradiate sunlight.

  Therefore, according to the solar tracking type daylighting device, the axis of the rotating shaft, the extending direction of the reference surface including the rotation center of the guide member and the bearing member, and the reference of the guide member or the bearing member provided with the support portion By appropriately setting the position on the virtual circle on the surface (that is, the inclination angle with respect to the diameter line of the mirror support arm), the reflection of incident sunlight is synchronized with the operation of the sun without requiring complicated control means. It is possible to irradiate light at any predetermined position at any time.

  The earth revolves around the sun once a day while rotating around its rotation axis once a year. The rotation axis has an inclination of about 23 ° 27 'with respect to the rotation axis. Therefore, the angle between the sun and the equatorial plane of the earth (solar declination) changes with the revolution of the earth, and as a result, what was 0 ° at the time of spring and autumn is + 23 ° 27 'at the summer solstice. And becomes -23 ° 27 'in the winter solstice.

  Therefore, as in the invention described in claim 3 or 4, the angle between the diameter line perpendicular to the axis of the rotation axis on the virtual circle and the drive arm is an angle range due to seasonal variation of solar declination. If a seasonal adjustment member that can be adjusted within a range of ± 1/2 is provided, the seasonal adjustment member tilts the mirror by an angle corresponding to the change in the solar declination as appropriate throughout the year. It is also possible to irradiate the reflected light from the mirror toward the position where it is desired to irradiate sunlight.

(First embodiment)
4 to 7 show a first embodiment of the solar tracking type daylighting apparatus according to the present invention, and FIGS. 8 to 10 show setting examples of the reflection direction.
4 and 5, reference numeral 1 in the drawings is a base 1 of the solar tracking type daylighting device, and a columnar column 2 is vertically erected on the base 1. The base 1 is installed so that the axis of the support column 2 is parallel to the rotation axis of the earth at any place on the earth. A rotating shaft 3 is provided on the support 2 so as to be rotatable about the axis of the support 2.

  A motor (driving means) 4 is fixed to the outer periphery of the support 2 located below the rotary shaft 3 with its output shaft 4 a parallel to the axis of the support 2. A gear 4 b fixed to the output shaft 4 a is meshed with a gear 3 a formed on the lower outer periphery of the rotary shaft 3. Here, the rotation speed of the motor 4 is set so as to rotate the rotation shaft 3 at a speed synchronized with the operation of the sun via the gears 4b and 3a, that is, one rotation in 24 hours.

  On the other hand, a drive arm 5 having one end fixed to the rotary shaft 3 and the other end extending outward in the radial direction of the support column 2 is provided on the outer periphery of the rotary shaft 3. A plate-like mirror 6 that reflects sunlight is connected to the tip. The mirror 6 is arranged so as to reflect sunlight on the surface 6a opposite to the rotary shaft 3 side, and one end of the mirror support arm 7 is fixed vertically at the center of the back surface 6b. . The mirror 6 is rotatably provided at the distal end portion of the drive arm 5 via a spherical bearing (bearing member) 8 provided at the one end portion of the mirror support arm 7.

  Further, an arm portion 9 having a length shorter than that of the drive arm 5 is integrally formed at the upper end portion of the support column 2 toward the radially outer side of the support column 2. The support portion 10 is provided in parallel to the axis of the support column 2. The support portion 10 is provided so as to be rotatable around an axis via a bearing 11, and a guide pin (guide member) 10 a is attached to an upper end portion thereof.

On the other hand, the mirror support arm 7 is formed with a guide groove 12 that is continuous over almost the entire length in the longitudinal direction, and a guide pin 10 a is inserted into the guide groove 12.
Here, the guide pin 10a has a rotation axis on a reference plane (the paper surface of FIG. 4) including the guide pin 10a, the axis of the rotation shaft 3, and the rotation center of the mirror 6, that is, the rotation center of the spherical bearing 8. 3 is arranged on an imaginary circle S having a radius of the length between the center of 3 and the rotation center of the mirror.

  Thereby, one end side of the mirror support arm 7 is rotatably connected to the tip end portion of the drive arm 5 by the spherical bearing 8, and the other end side is guided by the guide pin 10a so as to be relatively movable in the longitudinal direction. It is supported. Furthermore, as a result of the guide portion 10 provided with the guide pin 10a being rotatably provided around the axis thereof by the bearing 11, the mirror support arm 7 is rotated around the axis perpendicular to the longitudinal direction on the reference plane. It is supported so that it can rotate freely.

  In addition, at the mounting portion of the spherical bearing 8 provided at the tip of the drive arm, the vertical inclination angle of the mirror 6 in the reference plane is an angle between at least the maximum value and the minimum value of the solar declination. An adjustment screw (seasonal adjustment member) that can be adjusted in an angle range that is ½ of the range (similar to the adjustment screw 13 in FIG. 2 described later) is provided.

Next, the operation of the solar tracking type daylighting device having the above configuration will be described.
As shown in FIG. 1, Tokyo is located at 35 degrees north latitude and has directions of north, south, east, west, and north. For convenience of understanding, the case where the solar tracking type daylighting apparatus is installed in the north pole will be described. In this case, there is actually no east, west, south, and north in the North Pole, but the direction in which the direction in Tokyo is rotated to the North Pole around the center of the earth, that is, the direction of Tokyo is south (12 o'clock direction in solar operation) Assume that

  As shown in FIGS. 2 and 3, the axis of the support column 2 (that is, the axis of the rotating shaft 3) is aligned with the rotation axis A of the earth, and the guide pin 10a is mirror-supported on the virtual circle on the reference plane. The arm 7 is provided on a horizontal diameter line, and an extension line to the mirror 6 side of the line connecting the guide pin 10a and the center of the rotary shaft 3 in a plan view from the direction of the axis (= the rotation axis A of the earth) is provided. Install towards the south side.

Next, when the rotating shaft 3 is rotated by the motor 4 at a speed synchronized with the operation of the sun, the sunlight is always reflected toward the south direction regardless of the position of the mirror 6.
Therefore, when the sun tracking daylighting device is installed in Tokyo at 35 degrees north latitude, the axis of the rotary shaft 3 is similarly made parallel to the rotation axis A of the earth, and from the direction of the axis (= the rotation axis A of the earth). In the plan view, the extension line to the mirror 6 side of the line connecting the guide pin 10a and the center of the rotary shaft 3 is installed toward the south side, so that the sunlight can always be reflected toward the south side.

  Moreover, as shown in FIG. 4, sunlight is incident on the reference plane parallel to the diameter line L (see FIG. 7) orthogonal to the axis (strictly speaking, at the time of spring equinox and autumn equinox). Therefore, when the guide pin 10a is provided on the virtual circle S on the reference plane and at a position where the mirror support arm 7 and the diameter line form an angle of 30 °, sunlight is reflected at the mirror 6 at the inclination angle. Reflected across an angle of 60 °, which is twice 30 °.

  Then, when the rotating shaft 3 is rotated at a speed synchronized with the operation of the sun by the motor 4, that is, at a speed of one rotation in 24 hours, the mirror 6 is also rotated integrally with the rotating shaft via the drive arm 5, and as a result, As shown in FIG. 5, the reflected light from the mirror 6 is always reflected in the south direction and with a vertical inclination of 60 ° with respect to the diameter line on the reference plane.

  In FIG. 5, it appears that the reflected light from the mirror 6 does not always irradiate in a certain direction, but this shows a plane viewed from the axial direction. This is because the reflected light is a vector having an azimuth component in the plane and a vertical tilt angle component in the reference plane orthogonal to the plane.

  In FIG. 4, the guide pin 10 a and the center of the rotating shaft 3 are located in a plan view from the surface extending from the reference surface toward the mirror 6, that is, the direction of the axis of the rotating shaft 3 (= the rotation axis A of the earth). Although the case where the sunlight is always reflected toward the south side by installing the extension line to the mirror 6 side of the connecting line is shown, the direction of the extension surface of the reference plane toward the mirror 6 side is shown. By directing in an appropriate direction of east, west, south, and north, sunlight can be always reflected toward the direction.

  Further, with respect to the vertical inclination angle of the reference plane of the reflected light, the case where the guide pin 10a is provided on the virtual circle S at a position where the mirror support arm 7 and the diameter line form an angle of 30 ° is illustrated. However, by changing the position of the guide pin 10a on the virtual circle S and setting the tilt angle to an appropriate angle, it is possible to always irradiate reflected light in a predetermined tilt angle direction.

  This will be described in detail with reference to FIGS. 6 and 7. First, in the plan view in the axial direction shown in FIG. 6, the guide pin 10a is the origin, and the diameter line L direction passing through the origin is the Y axis (the O time direction is the normal direction). ). The orthogonal direction of the Y-axis guide pin 10a is defined as the X-axis (4 o'clock direction is positive), and the vertical line passing through the guide pin 10a of the reference plane orthogonal to the diameter line L direction is defined as the Z-axis ( The upper part is positive). Consider the case where the radius of the diameter line L is 1 and the time is T (0 to 24:00) and sunlight is reflected downward on the south side.

Then, if the inclination of the mirror support arm 7 with respect to the diameter line L is φ, the coordinates (x, y, z) of the rotation center of the mirror 6 (center of the spherical bearing 8) are:
(X, y, z) = (sin15T, cos15T-Yb, Zb)
It is.
Here, from FIG. 7, since φ = θ / 2,
Yb = 2 cos φ2-1 = cos θ
Zb = 2sinφcosφ = sinθ
It is.

And since the vector which goes to the rotation center of the mirror 6 from the guide pin 10a becomes the normal vector M of the mirror 6 at each time as it is,
M = (sin15T, cos15T-cosθ, -sinθ) (1)
On the other hand, when the incident light vector of sunlight is Lin and the reflected light vector is Lout,
Lin = (− sin15T, −cos15T, 0)
Lout = (0, −cos θ, −sin θ)
It is.

Theoretically, the normal vector Mt of the mirror 6 can be calculated from the above Lin and Lout as follows.
Mt = Lout−Lin
= (Sin15T, cos15T-cosθ, -sinθ) (2)

From the above formulas (1) and (2), it can be seen that the normal vector M of the mirror 6 obtained by drawing coincides with the normal vector Mt of the mirror 6 obtained from the theoretical formula.
Therefore, regardless of the position of the sun in the day, it is possible to always irradiate sunlight at a preset position.

  Further, by setting the installation position of the guide pin 10a at an appropriate location on the virtual circle S on the reference plane, sunlight incident in parallel to the diameter line S can be inclined with respect to the diameter line S. Can be reflected at an angle.

That is, as shown in the setting example shown in FIG. 8, when the guide pin 10a is provided at a position where the virtual circle S intersects the upper axis of the rotary shaft 3, φ = 45 ° and θ = 90 °. Sunlight can be reflected directly below by the mirror 6.
Further, as in the setting example shown in FIG. 9, if the guide pin 10 a is provided on the virtual circle S and at a position closer to the mirror 6 than the intersection with the axis of the rotating shaft 3, the diameter pin L On the other hand, sunlight apologized in parallel can be reflected downward with an angle θ of 90 ° or more.

  Furthermore, when the guide pin 10a is provided on the virtual circle S and at a position below the diameter line L as in the setting example shown in FIG. Can also be reflected upward.

  Thus, according to the solar tracking type daylighting device having the above-described configuration, the axis of the rotating shaft 3 is installed in parallel with the rotation axis A of the earth, and the axis of the rotating shaft 3, the guide pin 10a, and the mirror 6 are rotated. By appropriately setting the extending direction of the reference plane including the center (8) and the installation position on the virtual circle S on the reference plane of the guide pin 10a, it is synchronized with the operation of the sun without requiring complicated control means. Thus, it is possible to always irradiate reflected light of incident sunlight toward an arbitrary predetermined position.

(Second Embodiment)
FIG. 11 shows a second embodiment of the present invention. The same components as those shown in the first embodiment are denoted by the same reference numerals, and the description thereof is simplified.
As shown in FIG. 11, in this solar tracking type daylighting apparatus, a support column 2 is suspended from a base 1 so that the axis line is parallel to the rotation axis of the earth, and a lower portion of the support column 2 is rotated. A shaft 3 is provided by a motor 4 so as to be rotatable around the axis.

And the guide pin (guide member) 10a is attached to the front-end | tip part of the drive arm 5 extended toward the radial direction outward of this support | pillar 2. As shown in FIG.
On the other hand, a spherical bearing (bearing member) 8 is provided at the lower end of the support portion 10. Here, the spherical bearing 8 is configured such that the center of the rotating shaft 3 and the guide pin 10a are on a reference plane (the paper surface of FIG. 11) including the rotation center of the spherical bearing 8, the axis of the rotating shaft 3, and the guide pin 10a. Are arranged on a virtual circle S having a radius between them.

  The mirror support arm 7 is rotatably connected to the lower end portion of the support portion 10 by a spherical bearing 8 at one end side on the mirror 6 side, and a guide pin 10a is inserted into the guide groove 12 at the other end side. By doing so, it is supported while being guided so as to be relatively movable in the longitudinal direction.

The same effect as that of the first embodiment can also be obtained by the solar tracking daylighting device having the above configuration.
In addition, in the first embodiment, the mirror 6 rotates along the circumference of the virtual circle S at a position separated from the rotation shaft 3, whereas the sun tracking shown in the second embodiment is performed. According to the daylighting device, since the mirror 6 rotates around the spherical bearing 8 provided on the support portion 10, the irradiation position does not fluctuate, so that sunlight is constantly reflected at a fixed point with higher accuracy. The effect that it can be obtained.

(Third embodiment)
FIG. 12 shows a third embodiment in which a synchronous seasonal adjustment member is provided in the solar tracking type daylighting apparatus shown in the first embodiment.
As shown in FIG. 12, in this solar tracking type daylighting device, one end of the drive arm 5 is connected to the rotary shaft 3 by a pivot 20 so that the spherical bearing 8 at the tip can freely rotate along a virtual circle. Is provided.

A motor 4 for rotating the rotary shaft 3 is provided at the lower portion of the support column 2, and a male screw portion 21 is formed on the outer periphery of the elongated output shaft 4a.
On the other hand, a rail 22 is provided on the lower side surface of the column 2 in parallel with the axis, and a frame-like slider 23 is provided so as to be movable in the axial direction along the rail 22 and the outer periphery of the lower portion of the rotary shaft 3. It has been. And the nut 24 fixed to this slider 23 is screwed by the external thread part 21 formed in the outer periphery of the output shaft 4a.

  Further, one end portion of the link rod 25 is rotatably connected to the upper portion of the slider 23, and the other end portion of the link rod 25 is rotatably connected to the intermediate portion of the drive arm 5. Yes. The male screw portion 21, the slider 23, and the nut 24 constitute a slide mechanism that converts the rotation of the motor 4 into a linear motion in the axial direction, and the link rod 25 has an angle with respect to the diameter line L of the drive arm 5 The link mechanism which changes is comprised.

  And since the rotational speed of the rotating shaft 3 is set so as to rotate at a speed synchronized with the operation of the sun, that is, at a speed of one rotation in 24 hours, the sliding shaft and the link mechanism have the rotating shaft 3 In one rotation, the angle of the drive arm 5 with respect to the diameter line L is set to change by an angle corresponding to the solar declination that changes in the 24 hours.

  In the solar tracking daylighting device having the above configuration, in addition to the operational effects of the first embodiment, when the output shaft 4a of the motor 4 is further rotated, the rotating shaft 3 is rotated, and accordingly the nut 24 is rotated. As a result, the slider 23 is moved upward in the figure, and as a result, the drive arm 5 is rotated clockwise by the link rod 25, whereby the angle with respect to the diameter line L is increased by an angle corresponding to the seasonal variation.

  Therefore, according to this solar tracking type daylighting apparatus, as shown in FIG. 15, if the slider 23 is set at the lowermost part of the support column 2 at the winter solstice, the reflection of sunlight by the mirror 6 is performed in parallel. Then, the drive arm 5 is gradually rotated in the clockwise direction in the figure, and the tilt angle of the mirror 6 is automatically finely adjusted by an angle corresponding to the change in solar declination until the summer solstice shown in FIG. Therefore, the reflected light from the mirror 6 can always be irradiated toward the position where it is desired to irradiate sunlight.

(Fourth embodiment)
FIG. 13 shows a fourth embodiment in which a synchronous seasonal adjustment member is similarly provided in the solar tracking daylighting device shown in the first embodiment, and also in this solar tracking daylighting device, One end of the drive arm 5 is connected to the rotary shaft 3 by the pivot 20, so that the spherical bearing 8 at the tip is provided to be rotatable along a virtual circle.

  In this solar tracking type daylighting device, a worm gear 30 is provided on the output shaft 4 a of the motor 4, and a scotch choke large gear 31 comprising a large gear 31 and a slider 32 is screwed to the worm gear 30. . In addition, one end portion of the link rod 33 is rotatably connected to the upper end side portion of the slider 32, and the other end portion of the link rod 33 is rotatably connected to the intermediate portion of the drive arm 5. Yes.

  Accordingly, the worm gear 30 and the scotch choke constitute a slide mechanism that converts the rotation of the motor 4 into a linear motion in the axial direction, and the link arm 33 rotates the motor 4 with the diameter of the drive arm 5. A link mechanism that changes the angle with respect to the line L is configured.

  According to the solar tracking type daylighting device having the above configuration, similarly, the rotation of the output shaft 4a of the motor 4 is converted into a vertical linear motion by the worm gear 30 and the scotch choke, and the linear motion is converted by the link rod 33. Since the drive arm 5 can be rotated, the same effects as those shown in the third embodiment can be obtained.

  Further, in this solar tracking type daylighting device, the slider 32 can be reciprocated in the vertical direction by continuous rotation in one direction of the motor 4, so that the winter solstice shown in FIG. 15 and the summer solstice shown in FIG. Again, until the winter solstice shown in FIG. 15, the tilt angle of the mirror 6 can be finely adjusted continuously and automatically by an angle corresponding to the change of the solar declination, and therefore the reflection from the mirror 6 throughout the year. It is possible to irradiate light toward a position where it is desired to constantly irradiate sunlight.

It is a schematic diagram which shows the positional relationship between the rotation axis of the earth and Tokyo, and the incident direction of sunlight. It is a sun tracking type daylighting device concerning the present invention, and is a front view showing a case where a mirror support arm is located on a diameter line of a reference plane. It is a top view which shows the incident and reflection direction of sunlight at the time of installing the lighting apparatus of FIG. 2 in the north pole, and rotating it synchronizing with the operation | movement of the sun. 1 is a front view showing a first embodiment of a solar tracking daylighting device according to the present invention. It is the top view seen from the rotation axis direction which shows the state which acted the lighting apparatus of FIG. 4 synchronizing with operation | movement of the sun, and the direction of reflected light. It is a top view which shows the coordinate axis set in order to demonstrate the principle of the solar tracking type daylighting device of FIG. It is a schematic diagram which shows the positional relationship of each component of FIG. It is a schematic diagram at the time of positioning the guide pin of FIG. 7 on a rotating shaft line. FIG. 5 is a schematic view when the guide pin of FIG. 4 is positioned on the mirror side with respect to the rotation axis. It is a schematic diagram at the time of positioning the guide pin of FIG. 4 below the diameter line. It is a front view which shows the 2nd Embodiment of this invention. It is a front view which shows the 3rd Embodiment of this invention. The 4th Embodiment of this invention is shown, (a) is the whole front view, (b) is an enlarged view of the principal part. It is a schematic diagram which shows the positional relationship of each component at the time of the summer solstice by the 3rd or 4th solar tracking type daylighting device. It is a schematic diagram which shows the positional relationship of each component at the time of the winter solstice by the 3rd or 4th solar tracking type daylighting device.

Explanation of symbols

3 Rotating shaft 4 Motor (drive means)
DESCRIPTION OF SYMBOLS 5 Drive arm 6 Mirror 6a Mirror surface 6b Mirror back surface 7 Mirror support arm 8 Spherical bearing (bearing member)
10 Supporting part 10a Guide pin (guide member)
11 Bearing 12 Guide groove 13 Adjustment screw (seasonal adjustment member)
21 Male thread portion 22 Rail 23, 32 Slider 24 Nut 25, 33 Link rod 30 Worm gear 31 Large gear A A rotation axis on the earth L Diameter line on the reference surface S Virtual circle on the reference surface

Claims (5)

A rotating shaft provided rotatably around an axis arranged in parallel with the rotation axis of the earth, driving means for rotating the rotating shaft at a speed synchronized with the operation of the sun, and one end portion are fixed to the rotating shaft. And a driving arm extending outwardly of the axis of the rotating shaft, and connected to the other end of the driving arm and rotated about the rotating shaft, and on the surface opposite to the rotating shaft. A mirror that reflects light; a mirror support arm that is vertically fixed to the back surface of the mirror; a support portion that supports the mirror support arm; and a guide member that supports and supports the mirror support arm. ,
A bearing member is provided at the other end of the drive arm, and the guide member is provided on the support portion on a reference plane including the guide member, the axis of the rotary shaft, and the bearing member. The mirror support arm is provided so as to be positioned on an imaginary circle having a radius between the bearing member and a radius, and one end of the mirror side is connected to the tip of the drive arm via the bearing member. A sun-tracking daylighting device, wherein the solar tracking-type daylighting device is provided so as to be rotatable, and is supported so as to be movable in the extending direction of the mirror support arm with the other end connected to a guide member. A rotating shaft provided rotatably around an axis arranged in parallel with the rotation axis of the earth, driving means for rotating the rotating shaft at a speed synchronized with the operation of the sun, and one end portion are fixed to the rotating shaft. And a driving arm extending outwardly of the axis of the rotating shaft, and connected to the other end of the driving arm and rotated about the rotating shaft, and on the surface opposite to the rotating shaft. A mirror that reflects light; a mirror support arm that is vertically fixed to the back surface of the mirror; a support portion that supports the mirror support arm; and a guide member that supports and supports the mirror support arm. ,
The guide member is provided at the other end of the drive arm, and the bearing member is disposed on the support portion on a reference plane including the bearing member, the axis of the rotary shaft, and the guide member. The mirror support arm is provided so as to be positioned on an imaginary circle having a radius between the guide member and a radius, and the mirror-side end portion rotates to the support portion via the bearing member. A sun-tracking daylighting device, wherein the solar tracking-type daylighting device is provided freely, and has the other end connected to a guide member and supported at the tip of the drive arm so as to be movable in the extending direction of the mirror support arm.   A seasonal adjustment member that allows an angle between a line perpendicular to the axis of the rotation axis on the virtual circle and the drive arm to be adjusted within a range of ± 1/2 of an angular range due to seasonal variation of solar declination. The solar tracking type daylighting device according to claim 1, wherein the solar tracking type daylighting device is provided.   One end of the drive arm is pivotably provided on the rotary shaft via a pivot so that the angle can be adjusted, and the seasonal adjustment member rotates the drive means in the axial direction of the rotary shaft. A slide mechanism that converts the linear movement into a linear motion, and a link mechanism that is connected to the slide mechanism and the drive arm to change the angle of the drive arm as the drive means rotates. The solar tracking type daylighting device according to claim 3, wherein   The solar tracking type daylighting apparatus according to any one of claims 1 to 4, wherein the bearing member is a spherical bearing.

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