JPH0638129B2 - Solar collector - Google Patents

Description

The present invention relates to a solar light collecting device, and more particularly, to a solar light collecting device in which a light receiving surface of a lens system that focuses the solar light is made to follow the movement of the sun to constantly collect the solar light efficiently. In the device,
The following movement unit including the lens system can be efficiently rotated with a small torque.

FIG. 1 is a perspective view showing an example of a solar light collecting device separately proposed by the present applicant, in which 1 is a cylindrical base portion, 2 is a transparent dome-shaped head, and The capsule 3 for the collecting device is configured, and in the use state, the solar collecting device 10 is housed in the capsule 3 as illustrated. The sunlight collecting device 10 includes a large number (for example, 7 or 19) of lenses 11 for converging sunlight.
Sunlight direction sensor 12 for detecting the direction of the sun, support frame 13 that integrally holds these, support frame 13
A first rotating shaft 14 for rotating the rotating shaft, a supporting arm 16 for rotatably supporting the rotating shaft 14, and the supporting arm 1
6 has a second rotation shaft 17 for rotating the first rotation shaft 14 around an axis orthogonal to the first rotation shaft 14, and the sunlight direction sensor 12 detects the direction of the sun. The first rotation axis and the second rotation axis are controlled so that the lens 11 always faces the sun.
The sunlight thus focused is introduced into an optical conductor cable (not shown) whose light receiving end is arranged at the focal position of the lens, and is transmitted to any desired location through the optical conductor cable. Thus, in the solar collecting device as described above, conventionally, since the driving force is applied coaxially with the motors that drive the first rotating shaft and the second rotating shaft, the bending of these rotating shafts is caused. Was large and the drive was not smooth. In particular, in the case of a device that follows a minute movement of the sun, such as the solar light collecting device, a pulse motor (including a DC pulse motor) is used to follow the minute movement of the sun. When this pulse motor is driven, an impact is applied and the rotating shaft bends as shown by R and S in FIG. 2, and further, the rotating portion including the lens system and the like shows T in FIG. 3 due to its inertia. In addition, the reaction force is added and the rotational force is not transmitted smoothly to these rotating shafts, and in the worst case, the rotating part hunts and the sunlight is efficiently collected. There were drawbacks such as not being performed.

The example shown in FIG. 1 was made in order to solve the above-mentioned drawbacks, and FIG. 2 shows an enlarged rear view of the main part of the solar light collecting device shown in FIG. The figure shows the side view. In FIG. 2, reference numeral 19 denotes a sunlight collecting unit, and a light receiving end of a light guide (not shown) is inserted into the hole P of the sunlight collecting unit 19 to move the sunlight collecting unit 19 in the X direction and the Y direction. The light receiving surface of the light guide is adjusted to match the focal position of the lens, and the sunlight focused by the lens is introduced into the light guide body and transmitted to any desired position through the light guide. 2 and 3, 18 and 22 are pulse motors, 20 and 23 are small gears, 21 and 24 are large gears, the large gear 24 is a substantially semicircular gear, and the gear 24 is a rotating shaft. Both ends are attached to a member integrally attached to the rotating shaft 14 with the center of rotation 14 as the support frame 13, and its teeth are on the back side of the lens (in other words, the surface of the lens). Motor 22 for driving the gear 24 is mounted on the support arm 1
The rotation of the motor 22 is transmitted to the large gear 24 via the small gear 23 to drive the first rotation shaft. Further, the large gear 21 is attached to the second rotating shaft 17, and the small gear 20 is attached to
Driven through.

Thus, according to the above-mentioned solar light collecting device, the first rotating shaft and the second rotating shaft are driven via the large-diameter gear that is concentric with the rotating shaft. It is possible to suppress the bending and the bending of the rotating part, and therefore the recoil due to the bending and bending is also eliminated, and a stable follow-up operation can be performed. In the example shown above, in order to drive the first rotating shaft 14, a substantially semicircular large-diameter gear 24, a small-diameter gear 23 that meshes with the gear 24, and the gear 23 are driven. 1 for the motor 22
Although a set is used, a driving mechanism having the same structure as these is symmetrically arranged in the axial direction of the rotary shaft 14 in FIG.
It is also possible to provide two sets (one pair) symmetrically with respect to the line Y ', and by doing so, it is possible to more stably support and rotate the rotating part including the lens system 11. It will be possible. In addition, the second rotary shaft 17 has a hollow structure,
If the light guide cables attached to the respective sunlight collecting portions 19 are arranged along the support arm 16 and then arranged through the hollow portion of the second rotating shaft 17, the light guide cables are The optical conductor cable is free to rotate with respect to the rotation of the first rotary shaft 14 and the second rotary shaft 17, that is, even if the first rotary shaft 14 and the second rotary shaft 17 rotate. It can be arranged so that it is not entangled.

However, since the above-mentioned solar light collecting device uses the gears 23 and 24 to transmit the rotation of the motor 23 to the rotating shaft 14, there is a drawback that the transmission of the rotation is not always smooth due to the backlash and rattling of the gears. .

The present invention has been made to solve the drawbacks that occur when the above-described gear is used, and one embodiment thereof is the fourth embodiment.
Shown in the figure.

FIG. 4 is a rear view showing an embodiment of the present invention. In this embodiment, a roller 34 is used in place of the substantially semicircular gear 24 shown in FIG. By using the roller 33, by doing so, it is possible to eliminate backlash, backlash, etc. which occur when a gear is used,
The lens system 11 can be rotated more smoothly. Note that 34a, 33a, and 32a are rollers and motors provided symmetrically with the rollers 34 and 33 and the motor 32 in the axial direction of the first rotating shaft 14, and thus drive the first rotating shaft 14 in this manner. It is also possible to provide a pair of driving mechanisms that are symmetrical with respect to the axial direction of the first rotation shaft, and when the pair of driving mechanisms is provided symmetrically with respect to the axial direction of the first rotation shaft 14, the lens system The rotating part including 11 can be supported and rotated more stably. Further, when the drive rollers 33, 33a are made of an elastic body, the impact of the rotating portion when the pulse motor is driven can be absorbed by the elastic roller. Also,
It is also possible to provide a support roller (idle roll) for supporting the rollers 34, 34a separately from the drive roller.
When this support roller is provided, the drive rollers 23, 2
It is not necessary to give a supporting function to the rollers 3a and the like to the rollers 3a and the like, and therefore, even when an impact or the like occurs in the rotating portion, the rotating portion can be stably driven.
Further, in the present invention, the gears 20, 2 shown in FIG.
Although rollers 30 and 31 are used in place of No. 1, either gears or rollers may be used in this portion, but the use of rollers allows more stable driving. On the street. In FIG. 4, reference numeral 40 denotes a light guide cable, and in the figure, an example is shown in which the light guide cable is arranged along the support arm 16 and then provided through the hollow portion of the second rotating shaft 17. However, in this way, the light guide cable can be arranged irrespective of the rotation of the rotating portion, that is, the light guide cable is not entangled by the rotation of the rotating portion. At that time, the diameter of the second rotary shaft 17 is changed to the fourth
If it is made large as shown in the figure, the bending of the second rotating shaft can be eliminated, which is convenient.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram for explaining an example of the solar light collecting device previously proposed by the applicant, and FIG. 2 is an enlarged rear view of the solar light collecting device shown in FIG. FIG. 4 is a side view, and FIG. 4 is a rear view showing an embodiment of the solar light collecting device according to the present invention. DESCRIPTION OF SYMBOLS 10 ... Solar collector, 11 ... Lens, 12 ... Sunlight direction sensor, 13 ... Support frame, 14 ... 1st rotating shaft, 16
... Support arm, 17 ... Second rotating shaft, 19 ... Sunlight collecting section, 18, 22 ... Pulse motor, 20, 23 ... Small gear, 21, 24 ... Large gear, 30, 3
1, 33, 33a, 34, 34a ... Roller, 40 ... Optical conductor.

Claims (1)

[Claims] 1. A large number of lens systems for concentrating sunlight, a sun collecting unit configured integrally with the lens system and for collecting the sun focused by the lens system, and the sun. A light guide for transmitting sunlight collected by the light collecting unit to a desired location, a first rotation shaft for rotatably supporting the lens system and a member integrally configured with the lens system, A first rotating shaft, the supporting arm supporting a first rotating shaft and a second rotating shaft supporting the supporting arm rotatably around an axis orthogonal to the first rotating shaft. And the second rotation axis is controlled so that the light receiving surface of the lens system faces the direction of the sun, so that sunlight is introduced into the light guide body and transmitted to any desired location through the light guide. In the collecting device, the first rotating shaft is rotated about the first rotating shaft. A substantially semicircular large-diameter roller, both ends of which are fixed to the member integrally attached to the rotary shaft and arranged on the back side of the lens system, is engaged with the roller, and is attached to the support arm. A solar light collecting device, the rotation of which is controlled by a driving roller having a small diameter which is rotated by a pulse motor provided.