JPH02260302A - Submersible lighting device - Google Patents

Abstract

PURPOSE:To illuminate the waterside of a construction effectively by disposing an optical fiber in the water near the waterside of a water area on which the construction fronts, and controlling the emitted light by an optical control lens. CONSTITUTION:On a construction 10, a light source device 20, and an optical fiber 30 having one end connected to the light source device 20 and the other end submerged and disposed in a water area 12 are provided. A light emitting part 40 is disposed on the other end side of the optical fiber 30 and in a position of the depth H of water from the water surface of the water area 12. Hence, the waterside of a construction disposed on the water area can be safely and certainly illuminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an underwater lighting device for illuminating the waterside of a structure placed facing a body of water.

[Prior Art] In recent years, development of waterfronts in water bodies such as rivers and the sea has been active, and plans are being advanced in particular for the construction of structures such as promenades and terrace seawalls that allow people to get closer to the waterside. There is.

It would be desirable to be able to use such facilities at night, but for this purpose it was common practice to install lighting equipment such as electric lights on the land where the facilities were located.

[Problem to be solved by the invention] When a lighting device is placed on land for night illumination of a promenade, etc. located near the water, the road surface of the promenade is illuminated; The waterfront cannot be effectively illuminated, and although it is a facility where you can get close to the water,
At night, its significance was halved due to lack of lighting.

In addition, for lighting on land, the waterfront of structures facing water,
In other words, since the boundary with the water body is not sufficiently illuminated, it becomes difficult to identify the boundary, which may lead to an accident.

Underwater lighting is desirable in order to effectively illuminate the water's edge, but if the light source itself is placed underwater, it is unreliable in terms of safety and reliability such as electric leakage, and furthermore, it is difficult to maintain. It was inferior and lacked practicality.

Therefore, it is an object of the present invention to provide safety and
Our objective is to provide an underwater lighting device that is excellent in terms of reliability and maintainability, and can reliably illuminate water areas and their boundaries.

[Means for Solving the Problems] The present invention includes a structure placed facing a water body, a light source attached to the structure, and a light source that enters the light from one end of the structure and illuminates the waterfront of the structure. An optical fiber that emits light from its other end that is submerged near the water surface, and a light control lens provided on the light emitting end side of this optical fiber, and is capable of illuminating the waterfront of the structure underwater. It is a feature.

[Function] Light emitted from a light source installed on the ground enters one end of an optical fiber, is guided into the water along the extension path of the optical fiber, and is exposed to the optical fiber near the water surface of the water body facing the structure. The light is emitted from the other end, is further bent by a light control lens, and is irradiated into the water.

Here, since the light source is placed outside the water body, there is no problem in terms of safety, reliability, and maintainability, and since the light source light is transmitted by optical fiber, it can be guided to the water with little loss of light. I can do it. Furthermore, since optical fibers are flexible, there are no restrictions on the position of the light source, and the light emitting end can be installed at any desired location. In addition, the direction of the light emitting end can be set as desired, for example, it is possible to spread the light from multiple optical fibers radially for illumination.The light from the optical fiber is diffused from its emitting end. Therefore, you can control the direction of the light with a light control lens, for example by narrowing down the light to improve its straightness, or - by not widening it after connecting the zero points, you can increase the width, spread, and illumination distance of the light. Set as desired - iJ function.

[Example] Hereinafter, an example of the present invention will be specifically described with reference to the drawings.

FIG. 1 schematically shows an example of the configuration of an underwater lighting device. In the figure, a structure 10 is placed facing a water area 12 such as a lake, a river, or the sea, and the structure 10 includes a road, a promenade, a terrace seawall 1 pier, etc., and its details are shown below. This will be discussed later.

A light source device 20 is provided on the structure 10, and an optical fiber 30 is provided, one end of which is connected to the light source device 20, and the other end of which is submerged in the water body 12. Further, a light emitting section 40 is arranged on the other end side of the optical fiber 30, and this light emitting section 40 is arranged at a position at a water depth H below the water surface of the water body 12.

This water depth H is preferably at a position of 10 to 30 cm, and this water depth H is based on the degree of pollution of the water area 12, etc.
It is set appropriately to provide optimal illumination.

As the light source device 20, the system shown in FIG. 2 may be adopted. The one shown in FIG. 2A has Fresnel lenses 2 and 4 arranged in the light irradiation area of the light source 22, and in front of this Fresnel lens 24, this lens 24
The light incident end 32 of the optical fiber 30 is placed at a focal length F of . Then, the parallel light from the light source 22 is bent by the Fresnel lens 24 and focused on the light input end 32 arranged at the focal length r, so that the light from the light source 22 can be efficiently input into the optical fiber 30. It becomes possible.

In the device shown in FIG. 2B, a curved reflecting mirror 26 is arranged behind the light source 22, and the light emitted from the light source 22 directly or the light irradiated from the light source 22 and reflected by the reflection [26] is reflected. Light incidence end 32 of the optical fiber 30
It was designed to lead to.

The one shown in FIG.
．． A Fresnel lens 24 is provided at a position facing the light incident end 32 and the light incident end 32, and a reflecting plate 28 made of, for example, aluminum is attached to the back side of the Fresnel lens 24.

The parallel light from the two light sources 22 and 22 enters the Fresnel lens 24 and is reflected by the reflection plate 28 on the back side of the Fresnel lens 24.
Since the light is guided so as to be focused on the light incidence end 32 located at the focal length F of 4, it is possible to similarly efficiently input light.

In addition, as the light source 22, for example, a high pressure sodium lamp,
Examples include multi-halogen lamps and mercury lamps.

Next, the light emitting section 40 will be explained with reference to FIG. 3.

In the case shown in FIG. 4A, inside a liquid-tight case 42,
The light emitting end 34 of the optical fiber 30 is connected and held, and a Fresnel lens (concave lens type) 44 as a light control lens is arranged opposite to this. Incidentally, the position of the light emitting end 34 is set at a position away from the Fresnel lens 44 by the focal length F of the lens 44.

Then, the light emitted from the light emitting end 34 of the optical fiber 30 is dispersed with an angle θ of, for example, 44″, but the Fresnel lens 4 at the focal length F
By making this light incident on 4, it becomes possible to irradiate the water as parallel light.

On the other hand, in the case shown in FIG. 2B, the distance between the light emitting end 34 and the Fresnel lens 44 is set to be shorter than the focal length F of the lens 44.

Then, the light bent by the Fresnel lens 44 is -
The light is first focused underwater and then irradiated in a diffused manner.

Incidentally, if the light emitting section 40 is configured as shown in FIG. 3(A),
Since it is irradiated as parallel light, it becomes possible to extend the illumination distance. On the other hand, if the configuration shown in FIG. 2B is used, the illumination distance will be shorter than that shown in FIG.

Here, if one optical fiber cable 30 is used to input light to one light source device 20, a large number of light source devices 20 must be arranged to illuminate a certain range. Therefore, it is preferable to configure one light source device l120 as an optical fiber group with several optical fibers 30 facing east.In this case, the arrangement of each light emitting part 40 of this optical fiber group is shown in FIG. I can list the following.

In the device shown in FIG. 5A, each light emitting section 40 has a different angle, and the light is emitted radially as shown in the figure.

In the device shown in FIG. 2B, the light emitting sections 40 are arranged in parallel at equal intervals, so that light from one light source device 20 can be irradiated over a predetermined area.

In addition, when the sea or a river on the downstream side flowing into the sea is defined as the water area 12, as shown in FIG.
It is preferable that the light emitting portion 40 of the optical fiber 30 be supported by the following. That is, the float 50 is supported so as to be movable up and down along a guide 52 attached to the structure 10, and the light emitting section 40 is supported in the water below the float 50. Further, a weight 54 is held in the middle of the optical fiber 30 placed in the water. Then, even if the water level of the water area 12 changes due to the ebb and flow of the tide, the light emitting part 40 supported by the float 50 can always be maintained at a constant water depth H above the changing water surface. . Therefore, when the light emitting part 40 is fixed at a constant water depth,
When the water level of the water area 12 falls, the light emitting section 40 floats above the water surface, or when the water level rises, the light emitting section 40 is placed deeper than the water surface, making it impossible to provide effective illumination. By adopting the structure shown in the figure, such inconveniences can be improved.

Next, the structures 10 will be specifically listed, and this structure 1
The underwater illumination device applied to 0 will be explained with reference to FIG. 6 and subsequent figures.

FIG. 6 shows an underwater lighting device applied to a pier 60 as the structure 10, and FIG.
FIG. In the same figure, the pier 60 is arranged on a horizontal structure 62 and on both ends of the horizontal structure 62, and its upper end supports the horizontal structure 62, and its lower end is buried in the bottom 14 of the water body 12. vertical structure 64
．． 64. The light source devices 20 are arranged at both ends of the horizontal structure 62, and
The optical fiber 30 from the light source device 20 is extended along the vertical structure 64, and the light emitting section 40 placed underwater is supported by the float 50 with the structure shown in FIG.

Here, when the light source 22 in the light source device 20 disposed on the pier 60 is turned on, the light from the light source 22 is efficiently transmitted to the optical fiber 30 by one of the methods shown in FIGS. 2(A) to 2(C). The light is guided to the light incident end 32 of the.

The incident light is guided along the extending direction of the optical fiber 30 and is emitted from the light emitting end 34. Furthermore, this light is bent by the Fresnel lens 44 using either of the methods shown in FIGS. 3(A) and 3(B), and is irradiated into the water. Furthermore, since the light emitting section 40 is supported by the float 50 in the manner shown in FIG. 5, even if the water level of the water area 12 changes, the light emitting section 40 will always irradiate the light at a depth of I■ below the water surface. It can be carried out.

Here, when the arrangement of the light emitting parts 40 is configured as shown in FIG. 4(A), the structure of the pier 60 is as shown in FIG. The light will be radiated from one location on both ends.By providing a large number of such underwater lighting devices at predetermined intervals in the longitudinal direction of the pier 60, as shown in FIG.
It becomes possible to illuminate the waterfront of this crosspiece a60 on both sides.

At this time, light? ! It is also possible to arrange the i, 20 inside the 7-shi mound 66 located on both sides of the pier 60. This makes it possible to illuminate the waterfront of the pier 60, which was previously difficult to do with only the streetlights 68, by highlighting the waterfront of the pier 60 and clearly distinguishing it from the surrounding area, thereby increasing safety. This will also help create a night view, allowing those who pass by the pier 60 at night to get closer to the water.

Furthermore, when the pier 60 shown in FIG. 7 is used as a fishing park, it can also have the effect of attracting fish.

In other words, fish with positive phototaxis, such as sardines, mackerel, and horse mackerel, relatively prefer bright places that are illuminated with light, so it is possible to attract many fish to the vicinity of the pier 60. Become. In particular, by using green or blue light as the light emitted from the light emitting section 40, the effect can be further enhanced. This can be achieved by, for example, using a Fresnel lens 44 disposed in the light emitting section 40 as a color lens having a color filter function. Alternatively, the Fresnel lens 24 in the light source device 20 for condensing the light from the light source 22 may be a colored lens.

Next, an embodiment in which the structure 10 is a terrace revetment and an underwater lighting device is applied to this terrace revetment will be described with reference to FIG.

In the figure, a terrace revetment 72 is provided on a revetment 70 facing the water area 12 so as to extend above the water area 12. This terrace seawall 72 serves as a promenade above the water area 12, and its negative part is made of tempered glass 72a, so that the water area 12 below can be viewed visually. Further, the free end side of the terrace seawall 72 is supported by a wave-absorbing plate 73, and the side of the wave-absorbing plate 73 on the seawall 70 side is secured as a relatively quiet area.

Further, a fish nest structure 74 is arranged in the water area 12 below the terrace seawall 72. This fish nest structure 74 has a partition wall 76 facing the seawall 70, and an air diffuser 78 is provided between the partition wall 76 and the seawall 70. By mounting a stone 80 above this air diffuser 78, a long path for the oxygen released from the air diffuser 78 to be dissolved in the water can be ensured. still,
Shield ring holes 79 are provided at two locations above and below the partition wall 76 to allow water to circulate on both sides of the partition wall 76, so that the amount of dissolved oxygen in the water area 12 can be maintained at a predetermined level at all times. I have to.

Upper terraces 82. Middle terrace 83. A lower terrace 84 is provided. A plurality of phytoplankton culture rods 85 are arranged in a supported manner between each terrace. On the other hand, the seawall 70 is provided with a light collector 86, and the sunlight collected by the light collector 86 is transmitted through an optical fiber 88 so that the light can be irradiated into the phytoplankton culture rod 85. There is.

In this way, by increasing the amount of dissolved oxygen in the water area 12 below the terrace seawall 72 through aeration with the air diffuser 78, and by irradiating light into the phytoplankton culture rod 85, photosynthesis there is promoted. Since food for fish is secured by becoming active and breeding plants, it becomes possible to attract many fish to this water area 12.

In order to apply an underwater lighting device to such a structure, a light source device 20 is installed on the overhanging end side of the terrace seawall 72.
The optical fiber 30 taken out from the light source device 20 is extended into the water along the wave-dissipating plate 73, and the light emitting part 40 is supported by a float 50 with a structure as shown in FIG. There is.

The underwater lighting devices provided on the terrace seawall 72 also function in the same way as the underwater lighting devices installed on the pier 60, and are provided at predetermined intervals along the long direction of the terrace seawall 72. This makes it possible to clearly highlight and illuminate the water edge of the terrace seawall 72, thereby improving safety and the like.

FIG. 9 shows a configuration in which an underwater reply I/run 90 is arranged on the side of a seawall 70 that has a terrace seawall 72 similar to that shown in FIG. For lighting inside the underwater restaurant 90, sunlight captured by the concentrator 86 is guided into the restaurant 90 through an optical fiber 88. Also, this underwater restaurant 90
A window made of tempered glass 92 is provided on the side facing the water area 12. A light emitting section 40 connected to the optical fiber 88 is disposed substantially above the tempered glass 92 and near the water surface of the water area 12,
This optical fiber 88 is connected to the condenser 86. Therefore, in [1], by illuminating the area above the tempered glass 92 from the light emitting part 40 and also using the illumination inside the underwater restaurant 90,
It becomes possible to visually observe the inside of the water area 12 outside the restaurant 90 at a predetermined brightness. Incidentally, an underwater illumination device similar to that of the embodiment shown in FIG. 8 is also provided on the projecting end side of the terrace seawall 72.

The underwater restaurant 90 can be illuminated at night by using other artificial lighting sources, and the light emitting section 40 located above the tempered glass 92 can also be supplied with light at night. If the light from the light source device 20 is guided through the optical fiber 30, the inside of the water body 12 can be visually observed through the tempered glass 92 even at night.

Although various specific examples of the structure 10 have been explained above, the effect of the underwater lighting device is to create a night view that highlights the waterfront of the structure 10, so when holding various events at the waterfront, this is useful. It is effective to use it as an event production.

Note that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention.

For example, a structure 10 to which the underwater lighting device of the present invention is applied
However, the present invention is not limited to the above-mentioned embodiments, and any type of lighting may be used as long as it can at least highlight the water edge of the structure 10 facing the water area 12 and provide underwater lighting. Such structure 1
0 can be applied to various other structures installed on land facing the water area 12, for example, the present invention can be applied to waterfront lighting near scaffolding at construction or civil engineering sites located at the waterfront. It is also possible to do so. In addition, water area 1
For example, as shown in FIG. For example, it may be supported by the float 50 or the like. By applying this type of boat 100 to a sightseeing boat, houseboat, fishing boat, etc. that sails at night, it is possible to improve the scenery during night sailing and further improve the effect of attracting fish in the vicinity of this boat 100. becomes.

In addition, various modifications can be made to the mounting position, mounting direction, and supporting means of the optical fiber, and even a light control lens provided at the light output end of the optical fiber does not necessarily have to be provided separately from the optical fiber. Not limited to
The output end of the optical fiber may be shaped to have a lens effect.

[Effects of the Invention] As explained above, according to the present invention, a light source provided outside a body of water enters the input end of an optical fiber, and the optical fiber is placed underwater near the edge of a body of water facing a structure, and By controlling the emitted light with a light control lens, the water edge of the structure can be effectively illuminated, and the water edge of the structure can be clearly illuminated to stand out from the surrounding area.
Safety can be increased. Furthermore, since the light source is located outside the water body and the optical fiber is almost maintenance-free, it is possible to realize highly reliable underwater lighting with excellent thermal stability and fewer breakdowns. Furthermore, by illuminating such waterfront areas at night, it is possible to enhance the effect of attracting fish. Further, since the present invention is effective in producing a night view, it is also useful to use such lighting when an event or the like is held.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram schematically showing the underwater illumination device of the present invention, and Figs. 2 (A), (B), and (C) illustrate light irradiation to the optical fiber input end by the light source device. 3(A) and (B) are schematic explanatory diagrams for
・Schematic explanatory diagram showing the structure of part 1, Figures 4 (A) and (B)
5 is a schematic explanatory diagram showing the arrangement of a plurality of optical fibers on the light output side, FIG. 5 is a schematic explanatory diagram showing a configuration in which the light output part of the optical fiber is supported by a float, and FIG.
Figure (A) is a schematic cross-sectional view of a structure in which underwater lighting devices are applied to a pier, Figure (B) is a schematic plan view of the pier, and Figure 7 shows a structure in which many underwater lighting devices are arranged on both sides of the pier. 8 is a schematic sectional view showing an example in which an underwater lighting device is applied to a terrace revetment structure as a structure; FIG. 9 is a schematic perspective view showing an example in which an underwater lighting device is applied to a terrace revetment structure having an underwater restaurant portion. 10 is a schematic cross-sectional view showing an embodiment in which the device is applied. FIG. 10 is a schematic explanatory diagram showing an embodiment in which an underwater lighting device is applied around a ship as a structure navigating in a sea area. 10... Structure part, 12... Water area, 22... Light source,
30... Optical fiber 40... Light output section, 44.
...Lens for light control (Fresnel lens) 50...Float, 60...Structure (pier) 72...Structure (terrace seawall), 100...Structure (ship). Agent Patent attorney Yuki Fu (2 others) Figure (A) (B) Figure (B) Figure IA) (B) TC) Figure (A) Pier 60 (B) Figure Figure diagram

Claims (4)

[Claims] (1) A structure placed facing a body of water; A light source attached to this structure; Light from this light source enters from one end, and light is emitted from the other end, which is submerged near the water surface of the structure at the water's edge. An underwater lighting device comprising: an optical fiber that emits light; and a light control lens provided on the light output end side of the optical fiber, and that illuminates the waterfront of the structure underwater. (2) The light emitting end side of the optical fiber is supported by a float floating in the water area adjacent to the structure, so that it can be constantly illuminated at a constant water depth even if the water level changes. The underwater lighting device described. (3) The underwater lighting device according to claim 1, wherein the light control lens is a colored lens. (4) The output ends of a plurality of optical fibers are supported at each location on the waterfront of the structure, and the light output ends of each optical fiber are oriented radially. The underwater lighting device according to any one of the items.