JPH0414721Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field This invention focuses sunlight using 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 position of a system.

BACKGROUND OF THE INVENTION Recently, as we enter an era of energy conservation, interest in the use of solar energy has increased. The applicant was one of the first to pay attention to the effective use of solar energy and has already made various proposals. Alternatively, it can be used without converting it into other forms of energy such as 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.

FIG. 6 is a perspective view for explaining an example of a solar light collection device previously proposed by the applicant;
1 is a cylindrical base portion, 62 is a transparent dome-shaped head, and these constitute a capsule 63 for a solar collector.In use, the capsule 63 has a solar panel as shown in the figure. A light collection device 60 is housed. This sunlight collecting device 60 includes a large number of lenses 2, for example, 19 lenses, for concentrating sunlight.
Sun direction sensor 6 for detecting the direction of the sun
4. A support frame 65 that holds these together, a first motor 66 that rotates these in the direction of arrow A, a support arm 67 that supports the lens 2 to the motor 66, and a support arm 67 that supports the motor 66. A rotating shaft 68 disposed perpendicular to the rotating shaft.
The sunlight direction sensor 64 detects the direction of the sun, and the detection signal causes the lens 2 to always be aligned with the sun. The first
and a second motor, the sunlight focused by the lens 2 is introduced into a light guide cable (not shown), etc. whose light receiving end is arranged at the focal position of the lens, and an arbitrary light source is passed through the light guide cable. The information is transmitted to the desired location. As described above, although the sunlight collecting device 60 is controlled to face the sun as a whole, the positional relationship between the lens 2 and the light receiving end of the light guide is not accurately aligned. Otherwise, it will not necessarily be possible to receive light efficiently even if the entire surface is facing the direction of the sun.
That is, when the solar collector is facing the direction of the sun, the receiving end of each light guide for all lenses must be precisely aligned with the focal point. When alignment is achieved in this way, when sunlight energy is transmitted using a light conductor cable and illuminated with sunlight energy, there is no conversion loss, and the sunlight energy can be used most efficiently. Therefore, in a so-called multi-lens solar collector using a large number of lenses, it takes a lot of effort and time to align the focus.

FIG. 3 is a schematic configuration diagram of a lens system for explaining an example of a sunlight collecting device to which the present invention is applied. , a frame body 3 and a bottom plate 4 for holding the lens 2, and a light conductor cable 5 through which the sunlight focused by the lens 2 is introduced. It is introduced into the optical conductor cable 5 and transmitted to a desired location through the optical conductor cable 5 for use.
Therefore, in the sunlight collecting device as described above, if the light-receiving end surface 5a of the light guide 5 does not match the focal point of the lens 2, the sunlight focused by the lens 2 will not be efficiently absorbed into the light guide cable 5. In particular, in a so-called multi-lens type sunlight collecting device having a large number of lens systems as described above, the positioning work for this purpose is difficult.

FIG. 4 is a bottom view for explaining an example of a lens system in a sunlight collecting device previously proposed by the applicant. The lens system 1 includes a hexagonal Fresnel lens 2 and a Fresnel lens. Holding frame 3 to hold
The sunlight focused by the Fresnel lens 2 is guided to a hole 16a for inserting the optical conductor cable provided approximately at the center of the pedestal 16 in the same manner as shown in FIG. . As shown in FIG. 5, the optical conductor cable 5 is inserted through the hole 16a, and its light receiving end surface 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 in connection with FIG. Further, 10a and 10b are bolt shafts arranged parallel to the bottom of the lens system 1, and these bolt shafts 1
0a and 10b have the bolt shafts 10a and 10b, respectively.
a cylinder 11a movable in the direction of arrow A on 10b;
11b is arranged, and these cylindrical bodies 11a, 1
Two bolt shafts 13a, 13b are arranged in parallel between 1b, and these bolt shafts 13a,
13b is also provided with cylinders 14a and 14b which are movable in the direction of arrow B on the bolt shafts 13a and 13b, respectively. And the cylindrical bodies 14a, 14b
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 mount. Therefore, by adjusting the cylindrical bodies 11a and 11b in the direction of arrow A and the cylindrical bodies 13a and 13b in the direction of arrow B, the position of the hole 16a of the pedestal 16 can be set near the focal position of the lens system 1. It can be adjusted to any position in a plane parallel to the paper surface. That is, when moving these cylinders 11a, 11b in the direction of arrow A, the bolt shafts 10a, 1
Nuts 12a, 12a' and 12b, 12 on 0b
By loosening b', the cylinders 11a and 11b can be moved in the direction of arrow A, and the cylinders 14a and 14b can be moved in the direction of arrow B.
When moving in the direction, the bolt shafts 13a, 13
Nuts 15a, 15a' and 15b, 15 on b
By loosening b', the cylinders 14a, 14b can be moved in the direction of arrow B, and in this way, the cylinders 11a, 11
b, 14a, 14b are movable and the pedestal 16
Adjust the position of the hole 16a to the desired position, and then tighten the nuts 12a, 12a'; 12b, 12b';
5a, 15a'; 15b, 15b' etc.
If you tighten 1a, 11b, 14a, 14b,
Since each of these cylindrical bodies is fixed by two nuts, they are securely locked and will not be misaligned after alignment.

Figure 5 is a sectional view taken from the - line in Figure 4;
In other words, the hole 16a of the pedestal 16 shown in FIG.
As shown in the figure, the pedestal 16 is integrally attached to the cylinders 14a and 14b, and therefore the pedestal 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.
Threads are cut on the outer periphery of the cylindrical body to engage with the nuts 21 and 22, and a groove 17a is cut in the outer 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 2 as described above. The outer sheath is cut off at the end, leaving only the fiber portion 5b,
These fiber portions are fixed by a cylindrical metal fitting 18 to constitute an 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 the inner diameter of the cylindrical body 17 as shown in the figure.
If the cylindrical body 17 is screwed into the cylindrical fitting 18 until the stepped part of the cylindrical body 17 hits the stepped part of the cylindrical fitting 18,
The light-receiving end face of the light guide 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 the arrow C as described above, so the light receiving end surface 5a of the optical conductor cable 5 is fixed in the direction of the arrow C. It can be adjusted to any position in the C direction, so the light receiving end surface 5 of the light guide 5
a can be accurately aligned with the focal position of the lens system 1. When performing alignment as described above, the sunlight direction sensor 64 aligns the entire sunlight collecting device 60 with the direction of sunlight, as already explained with reference to FIG. With the nuts 12a, 12a'; 12b, 12
b'; 15a, 15a'; 15b, 15b', etc. are once loosened to adjust the position of the pedestal 16, and the light-receiving end face of the optical conductor cable is aligned with the focal axis of the lens, and then the pedestal is fixed with the nut, Thereafter, the nuts 21 and 22 are loosened to adjust the light-receiving end surface of the optical conductor cable in the direction of the focal axis of the lens, so that the light-receiving end surface of the optical conductor cable is aligned with the focal position of the lens, and then the nuts 21 and 22 are tightened. The light guide cable is fixed to the pedestal. This adjustment work is performed for all light-receiving end faces of the optical conductor cables for each lens. Therefore, in multi-lens type solar collectors that use a large number of lenses, the adjustment work is not only complicated, but also difficult and time-consuming as it is difficult to access the adjustment parts. It was something I needed.

Purpose The present invention was made in order to eliminate the drawbacks of the prior art as described above, and in particular, to automate the manual adjustment work as described above.
The aim is to improve work efficiency.

Configuration Fig. 1 is a bottom view of a lens system for explaining an embodiment of the solar light collection device according to the present invention, and Fig. 2 is a cross-sectional view taken from the - line in Fig. 1 (however,
(when the optical conductor cable is connected), the parts in the diagram that have the same effect as those in Figures 4 and 5 are shown in Figures 4 and 5.
The same reference numerals as in the figure are given, and detailed explanation thereof will be omitted.

Now, in FIG. 1, 31a is the bolt shaft 10
31b is a gear that is screwed to the bolt shaft 10b, 32a is a gear that is screwed to the bolt shaft 13a, 32b is a gear that is screwed to the bolt shaft 13b, and 31b is a gear that is screwed to the bolt shaft 13b. Therefore, the pedestal 16 is moved in the direction of arrow A, and the gear 32
a and 32b to move the pedestal 16 in the direction of arrow B to align the light-receiving end face of the optical conductor cable with the focal axis of the lens, and then screw it onto the gear 33, that is, the cylindrical body 17 shown in FIG. gear 3
3 moves the light-receiving end surface of the optical conductor cable 5 in the direction of arrow C, and aligns the light-receiving end surface of the optical conductor cable with the focal position of the lens. As mentioned above, according to the present invention, the bolt shafts 10a, 1
0b, 13a, 13b, the cylindrical body 17, etc., by rotating the gears in the forward and reverse directions, the light receiving surface of the optical conductor cable can be focused on the lens. By using a motor (not shown) mounted on the pedestal 16, the light receiving surface of the light guide cable can be quickly and accurately aligned. Since it acts as a load for rotation, the adjustment position will not shift after adjustment. When controlling the motor, it is conceivable to control it so that the amount of light from the light conductor cable is maximized when the entire solar collector is aligned with the direction of the sunlight, but the light receiving end in the optical axis direction Since the adjustment is related to the components of the output spectrum due to the chromatic aberration of the lens, simply controlling the amount of output light to the maximum is not necessarily a good idea. Therefore, a reference optical conductor cable is determined in advance, and its light receiving end is manually adjusted to the optimum position, and this is used as a reference optical conductor cable for detecting the state of the sky at that time. The motor is remotely operated or controlled to minimize the difference between the light from one reference light pipe cable positioned by manual operation. It is now possible to align the light-receiving end face with the focal point of the lens. Even in cases where it is difficult to get close to each other, the light-receiving end face of each optical conductor cable can be easily and accurately and quickly focused on the lens by remote control. Also, in some cases, it may be necessary to collect sunlight with a predetermined wavelength component.
In such a case, sunlight of any desired wavelength component can be collected by controlling the motor that drives the gear 33 and adjusting the movement of the light-receiving end face of the light guide cable in the optical axis direction. . Furthermore, in the above description, it has been explained that the shift after alignment is prevented using the load of the motor, but in order to more reliably prevent the shift after alignment, the bolt shafts 10a, 10b; ,13
b; Cut a groove in the axial direction of the holding member 17 etc.;
Cylindrical bodies 11a, 11b; 14a, 14 are inserted into these grooves.
Alternatively, the tip of the bolt may be engaged through a screw hole provided in the pedestal 16.

Effects As is clear from the above explanation, according to the present invention, the adjustment work for aligning the light receiving end face of the optical conductor cable with the focal position of the lens can be performed very quickly and accurately.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining one embodiment of the sunlight collecting device according to the present invention, and includes a back view of the lens system,
Figure 2 is a sectional view taken along the - line in Figure 1, and Figure 3 is a
A schematic configuration diagram of a lens system of a solar collector to which the present invention is applied, FIG. 4 is a back view of a lens system of a solar collector which is a prior art of the present invention, and FIG.
FIG. 4 is a sectional view taken along the - line, and FIG. 6 is a schematic overall configuration diagram of an example of a sunlight collecting device. 1... Lens system, 2... Lens, 5... Light conductor cable, 10a, 10b, 13a, 13b...
Bolt shaft, 16... Pedestal, 17... Holding member, 1
8... Light guide fiber fixing fitting, 31a, 31
b, 32a, 32b, 33... Gears with threads inside.

Claims (1)

[Scope of utility model registration request] a pedestal for holding a large number of optical conductor cables having a plurality of lenses for converging sunlight, a light receiving end face disposed at the focal position of each of the lenses; a first adjustment mechanism having a plurality of adjustment mechanisms for adjusting the focal position of each lens, each adjustment mechanism moving and adjusting the light-receiving end surface of the light guide cable in the optical axis direction of the lens; a second adjustment mechanism that moves and adjusts the pedestal in two directions that are perpendicular to the optical axis direction and mutually perpendicular to each other, so as to introduce sunlight focused by the lens into the optical conductor cable. In the sunlight collecting device, the first adjustment mechanism includes a hole bored in the base, a holding member that holds the light receiving end side of the optical conductor cable, and a side surface of the hole in the axial direction of the hole. a groove or protrusion provided on the outer circumferential surface of the holding member, a protrusion or groove provided on the outer circumferential surface of the holding member that engages with the groove or protrusion, a screw provided on the outer circumferential surface of the holding member, and an inner circumferential surface that is The second adjustment mechanism includes a gear that is screwed into a screw and has teeth on its outer peripheral surface, and a motor that rotates the gear.
The pedestal is slidable on a bolt shaft disposed in a direction perpendicular to the optical axis direction and perpendicular to each other, and the pedestal is attached to the bolt shaft via a gear screwed onto the bolt shaft. and a motor configured to rotate the gear; one light guide cable of the plurality of light guide cables is configured to be moved along the plurality of light guide cables and has a motor configured to rotate the gear; A solar light collecting device characterized in that the light receiving end face is positioned in advance at a reference position when aligning the focal point of each lens.