JPS6145204B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention focuses sunlight by a lens system,
Improvement of a solar light collection device for introducing this focused sunlight into a light conductor cable and transmitting it to any desired location through the light conductor cable, more specifically, the light receiving end face of the light conductor cable is This invention relates to an improvement in an adjustment mechanism for aligning the focal point of a 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 pay attention to 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 a light conductor cable and illuminating with solar energy, there is no conversion loss, and the solar energy can be used most efficiently. Therefore, 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 point of the lens system, but if the positioning is done manually, a part of the worker's body may be at the focal point of the lens system. There was a risk of getting burned if you touched it.

The present invention has been made in view of the above-mentioned circumstances, and is a solar light collector that allows the light-receiving end face of a light conductor cable to be safely and accurately positioned at the focal point of a lens system without the risk of burns or the like. The aim is to provide equipment.

FIG. 1 is an overall configuration diagram for explaining an example of a sunlight collecting device to which the present invention is applied. , a frame 3 and a bottom plate 4 for holding the lens system 2, and a light guide cable 5 into which sunlight focused by the lens system 2 is introduced.
The sunlight focused by the lens system 2 is transmitted to a desired location through the optical conductor cable 5 for use. Therefore, in the sunlight collecting device as described above, the light-receiving end surface 5a of the light guide 5
If the focal point of the lens system 2 does not coincide with the focal point of the lens system 2, 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 firm, the positioning may shift due to vibration etc. during use, making the adjustment work difficult. . In addition, there was a risk that a part of the body would come into contact with the focus of the lens system during the adjustment process, resulting in burns.

The present invention has been made in view of the above-mentioned circumstances, and in particular, in the above-mentioned sunlight collecting device, it is possible to safely perform positioning work when aligning the light-receiving end face of the optical conductor cable with the focal position of the lens system. In addition, the above-mentioned drawbacks of the prior art are solved by ensuring locking after positioning.

FIG. 2 is a bottom view of the sunlight collecting device according to the present invention. The sunlight collecting device 1 has a hexagonal Fresnel lens 2 and a holding frame 3 for holding the Fresnel lens. The sunlight focused by
The light guide cable is guided to a hole 16a provided approximately at the center of the pedestal 16 for insertion of the optical conductor cable. As shown in FIG. 3, the optical conductor cable 5 is inserted through the hole 16a and its light receiving end face 5a is disposed, so that the sunlight focused by the Fresnel lens 2 Light is introduced into the light guide cable 5 and directed through the light guide cable 5 to a desired location for use, as described with reference to FIG. Therefore, in such a sunlight collecting device, as described above, the light receiving end face 5 of the optical conductor cable
It is necessary to align a with the focal point of the lens system 2, and the present invention enables this alignment work to be performed safely and reliably. Now, in FIG. 2, 10a and 10b are bolt shafts arranged parallel to each other at the bottom of the solar collector 1 .
These bolt shafts 10a, 10b are provided with cylindrical bodies 11a, 11b that are movable in the direction of arrow A on the bolt shafts 10a, 10b, respectively, and between these cylindrical bodies 11a, 11b, there are two bolt shaft 1
3a and 13b are arranged in parallel, and these bolt shafts 13a and 13b are also provided with cylinder bodies 14a and 14b that are movable in the direction of arrow B on the bolt shafts 13a and 13b, respectively. 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 cylinders 14a and 14b. Therefore, the cylinder 11
a, 11b in the direction of arrow A, and cylindrical bodies 13a,
By adjusting 13b in the direction of arrow B, the position of hole 16a of pedestal 16 can be adjusted to any position in the vicinity of the focal point of lens system 2 in a plane parallel to the plane of the paper. Accordingly, in the present invention, when moving these cylinders 11a, 11b in the direction of arrow A, loosen the nuts 12a, 12a' and 12b, 12b' on the bolt shafts 10a, 10b, and move the cylinders 11a, 11b. When moving the cylinders 14a and 14b in the direction of arrow A, loosen the nuts 15a, 15a' and 15b, 15b' on the bolt shafts 13a and 13b, and move the cylinders 14a and 14b in the direction of arrow B. , 14b are movable in the direction of arrow B, and in this way, the cylindrical bodies 11a, 11b and 1
4a and 14b are movable and the hole 16 of the pedestal 16 is
Adjust the position of a to the desired position, and then tighten the nuts 12a, 12a'; 12b, 12b'; 15a, 1
5a'; 15b, 15b', etc. to connect the cylinders 11a, 1
When 1b and 14b are tightened, each of these cylinders is fixed by two nuts, so that they are securely locked and there is no possibility of displacement after alignment.

FIG. 3 is a sectional view taken along the - line in FIG. 16 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 so as to be movable in the direction of arrow C. Threads are cut on the outer periphery of the cylinder body to engage with nuts 21 and 22. A groove 17a is cut in the axial direction to engage with the protrusion 16b of the base 16. Therefore, when the nuts 21 and 22 are loosened, the cylindrical body 17 is guided by the groove 17a and the protrusion 16b and becomes movable in the direction of arrow C. When the cylindrical body 17 is at the desired position, the nuts 21 and 22 are loosened. When tightened, the cylindrical body 17 is reliably fixed in that position, and there is little chance of any subsequent positional 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 to leave only the fiber portion 5b, and these fiber portions are fixed with a cylindrical fitting 18 to form the end portion of the optical conductor cable. A thread is cut on the outer periphery of this cylindrical metal fitting 18 to engage with a screw cut on the inner periphery of the cylindrical body 17, and after the cylindrical metal fitting 18 is attached to the fiber part of the optical conductor cable, the cylindrical metal fitting 18 The cylindrical body 17 is screwed onto the cylindrical body 17. At this time, a stepped portion 19 is provided on the outer diameter of the cylindrical metal fitting 18 and on the inner diameter of the cylindrical body 17 as shown in the figure, so that the stepped portion of the cylindrical body 17 is aligned with the stepped portion of the cylindrical metal fitting 18. By screwing the cylindrical body 17 into the cylindrical fitting 18 until it abuts against the cylindrical body 17, 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, the cylindrical body 17 is movable in the direction of arrow C as described above, so that the optical conductor cable 5
The light-receiving end surface 5a of the light guide 5 can be adjusted to any position in the direction of arrow C. Therefore, the light-receiving end surface 5a of the light guide 5
can be precisely 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 a 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 the light shielding plate 20. At the same time, the rotation of the nuts 21 and 22 is controlled by the light shielding plate 2.
This is done on the back side of the lens system so that part of the operator does not touch the focal point of the lens system during adjustment work. In addition, in that case, the light shielding plate 20
When a scale is marked on the outer periphery of the light shielding plate, 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 plate.

[Brief explanation of the drawing]

FIG. 1 is a schematic overall configuration diagram of a sunlight collecting device to which the present invention is applied, and FIG. 2 is a back view for explaining one embodiment of the sunlight collecting device according to the present invention.
FIG. 3 is a sectional view taken along the - line in FIG. 2. 1 ...Solar collection device, 2...Lens system, 5...
...Light conductor cable, 16...Pedestal, 17...Cylinder, 18...Light conductor fiber fixing fitting, 19...
Stepped portion, 20... light shielding plate, 21, 22... nut.

Claims (1)

[Scope of Claims] 1. A lens system for converging sunlight, a holding member for holding an optical conductor cable whose light-receiving end face is arranged at the focal position of the lens system, and a holding member that holds the light-receiving end face of the optical conductor cable at the focal position of the optical conductor cable. an adjustment mechanism for adjusting the focal position of the lens system, 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; and a second adjustment mechanism movable and adjustable in two mutually perpendicular directions, the solar light collecting mechanism being configured to introduce sunlight focused by the lens system into the light conductor cable. In the device, the first adjustment mechanism is configured to tighten and fix the holding member of the optical conductor cable from both sides with two nuts, and the first adjustment mechanism is configured to tighten and fix the holding member of the optical conductor cable from both sides, and the first adjusting mechanism is configured to tighten and fix the holding member of the optical conductor cable from both sides, and a nut on the light receiving end surface side of the optical conductor cable. A sunlight collecting device characterized in that a light shielding plate is integrally attached to the solar light collecting device. 2. The holding member consists of 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 has stepped portions on the outer periphery of the cylindrical metal fitting and the circumference of the cylindrical body. and when the cylindrical body is screwed onto the cylindrical metal fitting, the light-receiving end face 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 sunlight according to claim 1 or 2, wherein the cylindrical body has a threaded part on the outer periphery, and the nut is screwed into the threaded part. Collection device. 4 A pedestal having a hole through which the cylindrical body is inserted is integrated with the second adjustment mechanism, and the holding member is configured to be tightened and fixed to the pedestal from both sides by the two nuts. 3. A sunlight collecting device according to claim 1, 2, or 3, characterized in that: 5 The hole in the pedestal has a protrusion (or groove) extending in the axial direction of the hole, and the outer periphery of the holding member has a groove (or protrusion) extending in the axial direction of the holding member, and the groove and The sunlight collecting device according to any one of claims 1 to 4, wherein the holding member is movable in the front axis direction but not rotatable by a projection. . 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.