JPS58116501A - Solar light collecting device - Google Patents

Abstract

PURPOSE:To position photodetecting end surfaces at focal points accurately by allowing an adjusting mechanism to clamp a photoconductive cable fixed with two nuts from both sides and fitting a light shielding plate to the nut of the photodetecting end surface side of the photoconductive cable in one body. CONSTITUTION:Bolt shafts 10a and 10b provided in parallel at the bottom part of a solar light collecting device 1 are provided with cylinder bodies 11a and 11b which are movable on the shafts 10a and 10b as shown by an arrow A, and two bolt shafts 13a and 13b are provided between those cylinder bodies 11a and 11b; and those bolt shafts 13a and 13b are also provided with cylinder bodies 14a and 14b which are movable on the shafts 13a and 13b as shown by an arrow B. To those cylinder bodies 14a and 14b, a pedestal 16 having a hole 16b where the photodetecting end surface side of the photoconductive cable is inserted is fitted in one body, and consequently the position of the hole 16a of the pedestal 16 is adjustable near the focal point of a lens system either by adjusting the cylinder bodies 11a and 11b as shown by the arrow A, or by adjusting the cylinder bodies 13a and 13b as shown by the arrow B.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for focusing sunlight by a lens system, introducing the focused sunlight into a light guide cable, and transmitting the sunlight to any desired location through the light guide cable. The present invention relates to an improvement in a collecting device, and more particularly, to an improvement in an adjustment mechanism for aligning the light-receiving end face of the light guide cable to the focal point of the lens system.

Recently, as we enter an era of energy conservation, interest in the use of solar energy has increased.

The present applicant was one of the first to focus on the effective use of solar energy and has already made various proposals, but in order to use solar energy most effectively, it is necessary to convert solar energy into light energy. That is, it is used without converting it into other forms of energy such as electricity or heat. Therefore, the present applicant has proposed that solar energy be focused and introduced into a light guide cable, and guided through the light guide cable to a location that requires illumination to provide illumination. In this way, by transmitting solar energy using one light guide and illuminating with solar energy, there is no conversion loss, and the solar energy can be used most efficiently. In order to introduce sunlight focused by the lens system into the optical conductor cable, it is necessary to accurately position the light receiving end face of the optical conductor cable at the focal position of the lens system. When this was done manually, there was a risk that part of the worker's body would come into contact with the focal point of the lens system, resulting in burns.

The present invention was made in view of the above-mentioned circumstances, and
It is an object of the present invention to provide a sunlight collecting device that can safely and accurately align the light-receiving end face of a light conductor cable to the focal point of a lens system without causing any danger of burns or the like.

FIG. 1 is an overall configuration diagram for explaining an example of a sunlight collecting device to which the present invention is applied. The sunlight collecting device 1 includes, as shown in the figure, a lens system 2 for concentrating sunlight; a frame 3 and a bottom plate 4 for holding the lens system 2, and
It has a light guide cable 5 into which sunlight focused by the lens system 2 is introduced, and the sunlight focused by the lens system 2 is transmitted to a desired location through the light guide cable 5 for use. Therefore, in the sunlight collecting device as described above, the light-receiving end surface 5a of the light guide 5 or the lens system 2
If the focal point does not match, the sunlight focused by the lens system 2 cannot be efficiently introduced into the optical conductor cable 5, and the positioning work for this purpose is difficult.

In addition, even if the positioning is performed accurately during assembly, if the lock after positioning is not firmly secured, the positioning may be misaligned due to vibration or the like during use, making the adjustment work difficult. In addition, there was a risk that a part of the body would touch the focal point of the lens system during adjustment work, resulting in burns.

The present invention has been made in view of the above-mentioned circumstances.
In particular, in the above-mentioned solar power collecting device, it is possible to safely perform alignment work when aligning the light receiving end face of a light guide cable to the focal position of a lens system, and to ensure locking after alignment. This eliminates the drawbacks of the prior art described above.

FIG. 2 is a bottom view of the sunlight collecting device according to the present invention, and the sunlight collecting device 1 includes a hexagonal Fresnel lens 2,
It has a holding frame 3 that holds the Fresnel lens, and the sunlight focused by the Fresnel lens 2 is passed through the light guide cable insertion provided approximately at the center of the pedestal 16 in the same manner as shown in FIG. It is guided to the common hole 16a. this hole 1
6a, as shown in FIG. 3, the optical conductor cable 5 is inserted and its light-receiving end face 5a is disposed, so that the sunlight focused by the Fresnel lens 2 is As explained with reference to FIG. 1, it is introduced into the light guide cable 5 and guided to a desired location through the light guide cable 5 for use. In such a sunlight collecting device, it is necessary to align the light-receiving end surface 5a of the optical conductor cable with the focal point of the lens system 2, as described above, but the present invention allows this alignment work to be performed safely. It is designed to ensure that this process can be carried out reliably. Now, in FIG. 2, 10a and 10b are bolt shafts arranged parallel to the bottom of the solar collector 1, and these bolt shafts 10a and 10b are respectively
Direction of arrow on 10b? This movable cylindrical body 11a, ],
1kl is arranged, and two bolt shafts 13a, 13b are arranged in parallel between these cylinders 11a, llb, and these bolt shafts 13a, 13b also have bolt shafts 13a, 13b, respectively. , 13b are provided with cylinders 14a and 14b which can be moved in the direction of arrow B. A pedestal 16 having a hole 16a through which the light-receiving end of the optical conductor cable is inserted is integrally attached to the cylinder 14a (1141). Therefore, the cylindrical bodies 11a, ll
b in the direction of arrow A and the cylindrical body 13a% 131) in the direction of arrow B.
can be adjusted to any position near the focal point of the lens system 2 in a plane parallel to the plane of the paper. (
Accordingly, in the present invention, when moving these cylindrical bodies 11a and llb in the direction indicated by the arrow, the bolt shaft 1oa1Jo
Natsu on b) 12a, 12a' and h 12b, 12b'
Loosen the cylinder II a.

11 b is movable in the direction of arrow A, and the cylindrical body 14
When moving a, 14 b in the direction of arrow B, use the bolts '1li13 a, 15a on the 1-3b
' and 1sb, tsb'' to loosen the cylinders 14a, 14.
Let b be movable in the direction of arrow B, like this? Then, cylinder bodies 11a, llb and 14a are obtained.

14 Make b movable and align the pedestal] hole 6 + 6 a to the desired position, then 1, Natsu) 12 a
, 12a1: 12b, 12 b': 15 a, +5
a': 15t), 15b' etc.
If a, Il b, and 14 b are tightened, each of these cylindrical bodies is fixed by two nuts, so they are securely locked and there is no possibility of misalignment after alignment. The figure is a sectional view taken along the line 11-111 in FIG. , pedestal 1
6 is integrally attached to the cylinders 14a and 14b, so that the base 16 is movable in the directions of arrows A and B shown in FIG. Reference numeral 17 denotes a holding member (cylindrical body) for holding the optical conductor cable 5 movably in the direction of arrow C, and the outer periphery of the cylinder body is threaded to engage with nuts 21 and 22. In the axial direction, there is a groove 17a which engages with the protrusion 16b of the base 16. When the nuts 21 and 22 are loosened, the cylindrical body 17 becomes movable in the direction of arrow C guided by #17& and the protrusion 16b. 21
, 22, the cylindrical body 17 is securely fixed in that position, and there is little chance of any subsequent displacement. A light guide cable is inserted into the cylindrical body 17, and its light receiving end face 5a is aligned with the focal point of the lens system 2 as described above. The outer sheath is cut off at the end, leaving only a portion of the fiber 5b, and this portion of the fiber is fixed with a cylindrical fitting 18 to form the end of the optical conductor cable. A thread is cut on the outer periphery of this cylindrical fitting 18 to engage with a thread cut on the inner periphery of the cylindrical body 17, and after the cylindrical fitting 18 is attached, The cylindrical body 17 is screwed onto the cylindrical metal fitting 18. At this time, a stepped portion 19 is provided on the outer diameter of the cylindrical metal fitting 18 and the inner diameter of the cylindrical body 17 as shown in the figure, so that the stepped portion of the cylindrical body 17 is formed into a cylindrical shape. By screwing the cylindrical body 17 into the cylindrical metal fitting 18 until it hits the stepped portion of the metal fitting 18, the light-receiving end surface of the optical conductor cable can be positioned in a predetermined positional relationship with respect to the cylindrical body 17.

When the end of the optical conductor cable is fixed to the cylindrical body 17 in this manner, since the cylindrical body 17 is movable in the direction of arrow C as described above, the light receiving end surface 5a of the optical conductor cable 5
can be adjusted to any position in the direction of arrow C, so that the light receiving end surface 5. of the light guide 5 can be adjusted to any position in the direction of arrow C. a can be accurately aligned with the focal position of the lens system 2. When performing alignment as described above, sunlight is received by the lens system, but in that case, if a part of the worker's body touches the focal point of the lens system, there is a risk of burns, etc. There is danger.

The present invention is designed to prevent such a risk of burns, and as shown in the figure, a light-shielding plate 20 is provided integrally with the nut 21, and the nut 21 is rotated by this light-shielding plate 20. In addition, the nuts 21 and 22 are rotated on the back side of the light shielding plate 20, thereby preventing a part of the operator from touching the focal point of the lens system during adjustment work.

In addition, in this case, when marking a scale on the outer periphery of the light shielding plate 20, the amount of adjustment in the C direction of the light receiving end surface of the optical conductor cable can be predicted from the amount of rotation of the light shielding plate1.

[Brief explanation of drawings]

FIG. 1 is a schematic overall configuration diagram of a sunlight collecting device to which the present invention is applied, FIG. 2 is a back view for explaining one embodiment of the sunlight collecting device according to the present invention, and FIG. 3 is a ■ in Figure 2
It is a sectional view taken along the line -■. ↓...Solar collector, 2...Lens system, 5...Light conductor cable, 16...Pedestal, 17...Cylinder, 18
... Light guide fiber fixing fitting, 19 ... Step part, 20
... Light shielding plate, 2I, 22...Natsuto. Patent applicant 5t-4, similar, No. 1
Figure 2 Figure 3

Claims (6)

[Claims] (1) a lens system for converging sunlight; a holding member for holding a light guide cable whose light receiving end face is arranged at the focal position of the lens system; a first adjustment mechanism having an adjustment mechanism for adjusting the focus position, the adjustment mechanism moving and adjusting the light-receiving end surface of the optical conductor cable in the optical axis direction of the lens system;
The second adjusting mechanism is configured to be movable and adjustable in two directions perpendicular to the optical axis direction and mutually perpendicular to each other, and is adapted to introduce the thick light focused by the lens system into the optical conductor cable. In the sunlight collecting device, the first adjustment mechanism is configured to tighten and fix the holding member of the light conductor cable from both sides with two nuts,
A sunlight collecting device characterized in that a light shielding plate is integrally attached to a nut on a light receiving end surface side of the optical conductor cable. (2) The holding member includes a cylindrical metal fitting that holds the fiber portion of the optical conductor cable, and a cylindrical body screwed onto the outside of the cylindrical metal fitting, and the outer periphery of the cylindrical metal fitting and the circumference of the cylindrical body. is provided with a stepped portion, and when the cylindrical body is screwed onto the cylindrical metal fitting, the light-receiving end surface of the optical conductor cable is positioned in a predetermined positional relationship with respect to the cylindrical body by the stepped portion. A sunlight collecting device according to claim (1). (3) The cylindrical body has a threaded portion on the outer periphery, and the nut is screwed into the threaded portion. ) The solar light collecting device described in item 1. (4) A pedestal having a hole through which the cylindrical body is inserted is integrated with the second adjustment mechanism, and the holding part is secured to the pedestal by tightening from both sides with the two nuts. Claim No. (13) characterized in that
3. The sunlight collecting device according to item 1 or item 2 or item 3. (5) a hole in the pedestal has a protrusion or groove extending in the axial direction of the hole; and a groove (or protrusion) in the outer periphery of the holding member extends in the axial direction of the holding member; Claim No. 1 is characterized in that the holding member is movable in the forward axis direction and cannot be rotated by the projection.
) to (4). (6) The sunlight collecting device according to any one of claims (1) to (5), characterized in that the light shielding plate has a scale on its outer periphery.