JPS63158514A - Solar light collecting device - Google Patents

Abstract

PURPOSE:To improve the efficiency of turning of a follow-up moving part, by constituting the first revolving shaft so that its rotation can be controlled by a roughly semicircular and large diameter roller provided on the reverse side of a lens system, and a small diameter driving roller rotated by a pulse motor provided on a supporting arm. CONSTITUTION:A roughly semicircular and large diameter roller 34 provided on the reverse side of a lens system 11 in order to transfer a rotation of a pulse motor 32 to a revolving shaft 14, and a small diameter driving roller 33 which is engaged to said roller are used for the titled device. In such a way, a backlash, looseness, etc. generated at the time of using a gear are eliminated, and the lens system 11 can be turned smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar light collecting device, particularly a solar light collecting device in which the light-receiving surface of a lens system that focuses sunlight follows the movement of the sun to efficiently collect sunlight at all times. In the device,
This allows the following movement section including the lens system to rotate efficiently with a small torque.

FIG. 1 is a perspective view showing an example of a sunlight collecting device separately proposed by the applicant. A capsule 3 for a collecting device is constructed, and in use, a sunlight collecting device 10 is housed within the capsule 3 as shown. This sunlight collecting device 10 includes a large number of lenses 11 (for example, 7 lenses, 19 lenses) for converging sunlight;
A sunlight direction sensor 12 for detecting the direction of the sun; a support frame 13 that holds them together; The support frame 13
a first rotating shaft 14 for rotating the rotating shaft 14; a supporting arm 16 for rotatably supporting the rotating shaft 14; and a first rotating shaft 14 for rotating the rotating shaft 14;
6 around an axis perpendicular to the first rotation axis 14, etc., the direction of the sun is detected by the sunlight direction sensor 12, and the direction of the sun is detected by the detection signal. The first rotation axis and the second rotation axis are controlled so that the lens 11 always faces the direction of the sun, and the lens 11
The sunlight is focused by the lens and introduced into a light guide cable (not shown) whose light receiving end is disposed at the focal point of the lens, and is transmitted to any desired location through the light guide cable.

Therefore, in the solar light collection device as described above.

Conventionally, since the driving force is applied coaxially with the motor that drives the first rotation shaft and the second rotation shaft, the deflection of these rotation shafts is large and the driving is not performed smoothly. In particular, in devices that follow the minute movements of the sun, such as the solar collector, a pulse motor (DC
A pulse motor (including a pulse motor) is used to follow the minute movements of the sun, but when this pulse motor is driven, an impact is applied and the rotating shaft is bent as shown by R and S in Figure 2. Furthermore, the rotating part including the lens system etc. becomes as shown by T in FIG. 3 due to its inertia, and furthermore,
Due to the reaction, rotational force cannot be transmitted smoothly to these rotating shafts, and in the worst case, hunting occurs in the single rotating part, resulting in inefficient collection of sunlight.

The example shown in FIG. 1 was made to solve the above-mentioned drawbacks, and FIG. 2 shows an enlarged view of the back of the main part of the sunlight collecting device shown in FIG. 1.

FIG. 3 shows its side view. In FIG. 2, reference numeral 19 denotes a sunlight collecting section, and the light receiving end of a light guide (not shown) is inserted into the hole P of the sunlight collecting section 19.
9 in the X and Y directions to align the light-receiving surface of the light guide with the focal point of the lens, and introduce the sunlight focused by the lens into the light guide and transmit it to any desired position through the light guide. are doing. Now, in Figures 2 and 3.

18.22 is a pulse motor, 20.23 is a small gear, 21
．． 24 is a large gear, and the large gear 24 is a substantially semicircular gear, and the gear 24 is attached to the first rotating shaft 14 so that its teeth are on the back side of the lens (in other words, so that they do not come out on the surface of the lens). ) is attached to the motor 2 , which drives the gear 24 .
2 is fixed on the support arm 16, and the rotation of the motor 22 is transmitted to the large gear 24 via the small gear 23.
6. The rotating shaft of the machine is adapted to be driven. The large gear 21 is attached to the second rotating shaft 17 and is driven by the motor 18 via the small gear 20 .

According to the solar light collecting device, the first rotating shaft and the second rotating shaft are driven through a large-diameter gear that is concentric with the rotating shaft. The bending and bending of the rotating portion can be suppressed, and therefore, there is no reaction due to the bending and bending, and a stable follow-up operation can be performed. In the example shown above, the substantially semicircular large diameter gear 24. A small-diameter gear 23 that meshes with the gear 24 and a motor 22 that drives the gear 23 are connected to one another.
A drive mechanism having the same configuration as these is used symmetrically in the axial direction of the rotating shaft 14 in FIG.
It is also possible to provide two sets (one pair) symmetrically with respect to the ' line, and in this way, the rotating part including the lens system 11 can be more stably supported and rotated. becomes. Further, the second rotating shaft 17 has a hollow structure, and the optical conductor cables attached to each sunlight collecting section 19 are arranged along the support arm 16 and then through the hollow part of the second rotating shaft 17. By doing so, the optical conductor cable can be freely rotated with respect to the rotation of the first rotation shaft 14 and the second rotation shaft 17, that is, the first rotation shaft 14 and the second rotation shaft 17 can be rotated. Even if the light guide cable moves, the light guide cable can be arranged so as not to get entangled with the rotating part.

However, since the above solar collector uses 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 rotation is not necessarily smooth due to bumps, play, etc. of the gears. .

The present invention was made in order to solve the drawbacks that occur when using the above-mentioned gears, and one embodiment thereof is described in the fourth embodiment.
As shown in the figure.

FIG. 4 is a rear view showing one embodiment of the present invention. In this embodiment, a roller 34 is used in place of the substantially semicircular gear 24 shown in FIG. It uses roller 33.

By doing so, backlash, backlash, etc. that occur when using gears are eliminated, and the lens system 11 can be rotated more smoothly. In addition, 34a
, 33a, 32a are rollers and motors that are provided symmetrically with the roller 34, 33 and motor 32 with respect to the axial direction of the first rotating shaft 14.
It is also possible to provide a pair of drive mechanisms for driving the first rotation shaft 14 symmetrically with respect to the axial direction of the first rotation shaft 14. If the pair of drive mechanisms is thus provided symmetrically with respect to the axial direction of the first rotation shaft 14, The rotating part including the lens system 11 is supported more stably,
and can move once.

Furthermore, when the drive rollers 33, 33a are made of an elastic body, the impact generated on the rotating portion when the pulse motor is driven can be absorbed by the elastic rollers. It is also possible to provide a support roller (idle roll) that supports the roller 34.34a separately from the drive roller, and when this support roller is provided, the drive roller 23.23a
It is no longer necessary to provide a support function for supporting the roller 34a, etc., and therefore, even if an impact or the like occurs on the rotating portion, the rotating portion can be stably driven. Furthermore, in the present invention, rollers 30.31 are used in place of the gears 20.21 shown in FIG. As mentioned above, it is possible to drive more stably by using . In addition, in FIG. 4, 40 is a light guide cable, and the figure shows an example in which the light guide cable is arranged along the support arm 16 and then through the hollow part of the second rotating shaft 17. However, in this case, the optical conductor cable can be arranged regardless of the rotation of the rotating section, that is, the optical conductor cable can be arranged so that it will not become entangled due to the rotation of the rotating section. In this case, it is advantageous to increase the diameter of the second rotating shaft 17 as shown in FIG. 4, since this can eliminate the bending of the second rotating shaft.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic configuration diagram for explaining an example of a solar power collecting device previously proposed by the applicant, FIG. 2 is an enlarged rear view of the solar power collecting device shown in FIG. 1, and FIG. The figure is a side view, and FIG. 4 is a back view showing one embodiment of the solar light collecting device according to the present invention. 10... Solar collector, 11... Lens, 12.
... Sunlight direction sensor, 13... Support frame, 14...
- First rotation axis, 16... Support arm, 17... Second rotation axis. 19... Solar collector, 18.22... Pulse motor, 20.23... Small gear, 21.24... Large gear,
30°31.33.33a, 34, 34a...roller, 40...light guide.

Claims (6)

[Claims] (1) A large number of lens systems for concentrating sunlight, a solar light collection unit configured integrally with the lens system and for collecting sunlight focused by the lens system, and the sunlight a light guide for transmitting sunlight collected by a collection unit; a first rotation shaft that rotatably supports the lens system and the sunlight collection unit integrally configured with the lens system;
a support arm that supports the first rotation shaft; and a second rotation shaft that supports the support arm rotatably about an axis perpendicular to the first rotation shaft; The rotation axis and the second rotation axis are controlled so that the light receiving surface of the lens system faces the sun, sunlight is introduced into the light guide and transmitted to any desired location through the light guide. In the sunlight collecting device, the first rotating shaft engages with a substantially semicircular large diameter roller integrally attached to the rotating shaft and disposed on the back side of the lens system. and a small-diameter drive roller rotated by a pulse motor disposed on the support arm, the rotation of which is controlled by a sunlight collecting device. (2) The second rotating shaft is driven by a large-diameter gear or roller that is integrally attached to the rotating shaft, and a motor that meshes or engages with the gear or roller and is disposed on the fixed part. Claim No. 1, characterized in that the rotation is controlled by a small-diameter gear or roller that is rotated.
The solar light collection device described in section. (3) A pair of substantially semicircular large-diameter rollers, a small-diameter drive roller that engages with the rollers, and a motor that drives the small-diameter rollers are arranged symmetrically in the axial direction of the first rotating shaft. Claims (1) or (2) characterized in that:
2) The solar light collecting device according to item 2). (4) The substantially semicircular large diameter roller is supported by an idle roller and driven by the drive roller. The sunlight collection device according to any one of the items. (5) The sunlight collecting device according to any one of claims (1) to (4), wherein the drive roller and the idle roller are made of an elastic body. (6) The second rotating shaft has a hollow structure, and the light guide is disposed along the supporting arm and through the hollow part of the second rotating shaft. The sunlight collecting device according to any one of the ranges (1) to (5).