JP2005158408A - Lighting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting apparatus with continued mothproof effect and with reduced cost and labor. <P>SOLUTION: The lighting apparatus 1 comprises a discharge lamp 2, an apparatus main body 3 which houses the discharge lamp 2 and has an irradiation aperture for irradiating the light from the discharge lamp 2, and an optical filter 4 for cutting off the light of wavelength 410 nm or less. The optical filter 4 is installed at a position separated from the irradiation aperture on the optical path of the light irradiated from the irradiation aperture so that the air between the optical filter 4 and irradiation aperture may circulate with the outside of the lighting apparatus 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a luminaire with reduced attractivity.

Currently, there are discharge lamps such as mercury lamps, metal halide lamps, and high-pressure sodium lamps as light sources of lighting fixtures that are generally used. Among these, mercury lamps are widely used because they are inexpensive.
However, these discharge lamps have the property of attracting insects (insects), and mercury lamps in particular are highly attracting, and are often found around outdoor lamps and around windows in factories where room lights are installed. There is a problem of causing insects to fly.
It is already known that insects like light with wavelengths in the vicinity of 360 to 405 nm in particular as a cause of such insecticidal properties.

On the other hand, ultraviolet rays (wavelength of about 1 to 400 nm) have a wavelength range that is harmful to the human body and the like as described above. Etc. have been proposed (see, for example, Patent Document 1).
Japanese Patent Publication No. 6-3682

In order to solve the above-mentioned problem of attracting the discharge lamp, it is considered that the discharge lamp is provided with a film or a lamp cover containing an ultraviolet absorber to block the ultraviolet rays.
However, according to the study by the present inventors, it is necessary to have a certain level of brightness as in the case of outdoor lighting installed in parking lots of supermarkets and convenience stores, and lighting fixtures used for indoor lighting in factories, etc. When a conventional window pasting film, a fluorescent lamp lamp cover, or the like is used as it is for the lighting fixture, there are the following problems.
That is, unlike other light sources such as fluorescent lamps, the discharge lamp used in the lighting fixture as described above has a considerably high heat generation temperature due to the light emission. For this reason, the influence to the ultraviolet absorber contained in materials, such as a film, for an ultraviolet-blocking effect is large. Therefore, it is not simply necessary to provide a film or lamp cover on the discharge lamp, and it is necessary to suppress the temperature of heat applied to the material as much as possible.
However, until now, no examination has been conducted on the problems of deterioration of temperature and ultraviolet absorber as described above for conventional window pasting films and fluorescent lamp covers, and examples of lighting fixtures taking these problems into consideration. There is no.
Furthermore, due to the heat as described above, not only the UV shielding effect is deteriorated, but also the film and the cover itself are deformed. There is also a problem that it takes.

  The present invention has been made in view of the circumstances as described above, and it is an object of the present invention to provide an illuminating device that has a pesticidal reduction effect (hereinafter referred to as an insect-repellent effect) and has reduced costs and labor. It is said.

The present invention that solves the above-mentioned problems comprises a discharge lamp, a fixture body that contains the discharge lamp and emits light from the discharge lamp, and an optical filter that blocks light having a wavelength of 410 nm or less. And
The air between the optical filter and the radiation port is circulated to the outside of the lighting fixture at a position apart from the radiation port on the optical path of the light emitted from the radiation port. It is the lighting fixture characterized by being installed.

  In the present invention, the optical filter that blocks light having a wavelength of 410 nm or less is located between the optical filter and the radiation port at a position on the instrument body that houses the discharge lamp, away from the radiation port that emits light from the discharge lamp. With a simple configuration in which the air is circulated with the outside of the lighting fixture, the heat applied to the optical filter can be reduced, and the insect repellent effect can be maintained.

  In the lighting fixture, when used as an external light, it is preferable that a light transmitting plate is provided at the radiation port for the purpose of preventing rain water or the like from entering the fixture main body.

In the lighting apparatus, it is preferable that the discharge lamp is a mercury lamp, a metal halide lamp, or a high-pressure sodium lamp.
Since these discharge lamps are high-intensity discharge lamps having high luminance and are used for outdoor lights and indoor lamps in factories and the like, the effect of the lighting fixture of the present invention can be expected particularly.

  Moreover, in the said lighting fixture, when it is desired to further increase the insect-proof effect even if the illuminance is slightly reduced, it is preferable that a filter having a function of reducing the illuminance is stuck on the optical filter.

  The lighting fixture of the present invention has an insect-proof effect and is reduced in cost and labor.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<< First Embodiment >>
1 and 2 show a lighting fixture 1 according to a first embodiment of the present invention. 1, FIG. 2 (a)-(b) is the perspective view, side view, and front view of the lighting fixture 1, respectively.
The lighting fixture 1 of this embodiment basically has a structure including a discharge lamp 2, a fixture body 3 that houses the discharge lamp 2, and an optical filter 4 that blocks light having a wavelength of 410 nm or less. is there.
In the present embodiment, the optical filter 4 is attached to the instrument body 3 by four attachment fittings 5a to 5d (hereinafter, these may be collectively referred to as the attachment fitting 5). Here, an example in which the mounting brackets are provided at four positions has been shown, but the present invention is not limited to this, and may be one or more.

<Discharge lamp>
There is no restriction | limiting in particular as the discharge lamp 2, A commercially available thing can be used. Among these, high-intensity discharge lamps (HID lamps) such as mercury lamps, metal halide lamps, and high-pressure sodium lamps that are used for outdoor lamps and indoor lamps in factories and the like are preferably used.
A mercury lamp is a type of discharge lamp that utilizes light emission by discharge in mercury vapor. Depending on the pressure of mercury vapor, there are low-pressure mercury lamps (pressure of mercury during lighting is 0, 01 mmHg), high-pressure mercury lamps (about 1 atm (760 mmHg)), ultra-high pressure mercury lamps (10-200 atm), etc. In general, a high-pressure mercury lamp is used as an indoor lamp.
A metal halide lamp is a discharge lamp in which a luminescent material is added to a mercury lamp, and is superior in efficiency, life, and color rendering to a mercury lamp.
A high-pressure sodium lamp is a type of discharge lamp that utilizes light emission by discharge in sodium vapor.
Among these, mercury lamps have strong ultraviolet energy especially in the vicinity of 360 to 405 nm and high insect attractivity, and therefore the present invention is suitably applied.

<Apparatus body>
The instrument main body 3 has a substantially conical shape, and from the top side of the cone, a socket part 3a to which the discharge lamp 2 is mounted, a reflector part 3b that extends from the socket part 3a in a tapered shape, It consists of a substantially cylindrical shade portion 3c connected to the end of the reflector portion 3b, a radiation port 3d provided at the end of the shade portion 3c, and a translucent plate 3e that seals the radiation port 3d. The boundary portion between the shade portion 3c and the radiation port 3d is a tapered curved surface.
The light generated from the discharge lamp 2 attached to the socket part 3a is reflected by the reflector part 3b, radiates to the outside through the light transmission plate 3e, and radiates to the outside through the optical filter 4 from the radiation port 3d. Is done.

  Examples of the material of the socket portion 3a, the reflector portion 3b, and the shade portion 3 include materials that have high heat resistance and do not transmit light, such as metals such as aluminum and iron.

A glass plate is mentioned as the translucent plate 3e.
In the present embodiment, as shown in FIG. 3, the translucent plate 3e is provided so as to seal the radiation port 3d via a seal member 3f. Thereby, when using the lighting fixture 1 of this embodiment as an exterior light, for example, inflow of rainwater etc. can be prevented.

<Mounting bracket>
In FIG. 3, sectional drawing of the part of the attachment metal fitting 5 in the lighting fixture 1 is shown.
The mounting bracket 5 is newly developed as a result of studying a bracket suitable for mounting the optical filter 4 in the present invention, and fixes the special-shaped bracket body 51 and the bracket body 51 and the optical filter 4. A male screw 52, a bolt 53 for fixing the metal fitting main body 51 and the instrument main body 3, and a wing nut 54 screwed into the bolt 53.

FIG. 4 shows a top view (a), a front view (b), and a side view (c) of the metal fitting body 51.
The metal fitting body 51 is obtained by fixing two metal plates, and includes a side plate 56 having two female screw holes 55 a and 55 b that can be screwed with the male screw portion 53 a of the bolt 53, and a lower end of the side plate 56. The upper surface horizontal portion 57 bent substantially vertically, the vertical portion 58 bent substantially perpendicularly to the side surface portion 56 from the other end of the upper surface horizontal portion 57, and the upper surface horizontal portion from the other end of the vertical portion 58. A U-shaped member 60 comprising a lower surface horizontal portion 59 bent substantially perpendicularly in the same direction as 57, an upper surface portion 60a, a side surface portion 60b, and a lower surface portion 60c, and the side surface portion 60b is fixed to the lower end of the side surface plate 56; Consists of
The lower surface horizontal portion 59 is provided with a male screw insertion hole 61 into which the male screw 52 can be inserted. In addition, a female screw hole 62 for screwing the male screw 52 is provided in the lower surface portion 60c.

  In the present embodiment, the distance between the optical filter 4 and the translucent plate 3e is such a distance that the air between the optical filter 4 and the translucent plate 3e circulates outside the lighting fixture 1, The distance can be set by adjusting the width of the side surface portion 60 b of the U-shaped member 60.

<Optical filter>
The optical filter 4 may be any filter that can block light having a wavelength of 410 nm or less.

The optical filter 4 is a transparent clear type, but the present invention is not limited to this. For example, a filter having a function of reducing illuminance may be attached to the surface of the optical filter 4. In this case, the insect repellent effect is further enhanced.
Examples of the filter having such a function include a colored film colored in green or the like. However, as the color becomes darker, the insect repellent effect increases, but the transmittance of visible light decreases and the illuminance decreases, so the presence or absence of coloring, and the color intensity, the desired insect repellent effect and the illuminance. It is preferable to appropriately determine the balance.

<Attaching the optical filter>
In the present embodiment, the optical filter 4 is mounted on the optical path of light emitted from the radiation port 3d of the instrument body 3 by the mounting bracket 5 as follows.
First, holes were formed at positions corresponding to the positions of the male screw insertion hole 61 and the female screw hole 62 in the U-shaped gap formed by the lower surface portion 60c, the upper surface horizontal portion 57, the vertical portion 58, and the lower surface horizontal portion 59. The metal body 51 and the optical filter 4 are fixed by inserting the optical filter 4 and screwing the male screw 52 through the male screw insertion hole 61 and the optical filter 4 and screwing into the female screw hole 62.
Next, the radiation port 3d is disposed on the upper surface portion 60a, the bolt 53 is inserted into the female screw hole 55b of the side plate 56, and the insertion tip of the bolt 53 is a tapered curved surface at the boundary between the shade portion 3c and the radiation port 3d. The metal fitting main body 51 is attached to the instrument main body 3 by being screwed into the wing nut 54 so as to reach the upper side and sandwiching the radiation port 3d between the bolt 53 and the upper surface portion 60a.
On the contrary, the optical filter 4 may be attached to the attachment fitting 5 after attaching the attachment fitting 5 to the instrument body 3.

In the lighting fixture 1 to which the optical filter 4 is attached in this way, the optical filter 4 is installed at a distance of the width of the side surface portion 60b of the U-shaped member 60 from the light transmitting plate 3e of the radiation port 3d. In addition, the air between the optical filter 4 and the translucent plate 3 e circulates outside the lighting fixture 1.
Therefore, in the luminaire 1 of the present embodiment, even when the translucent plate 3e is heated by heat generated from the discharge lamp 2, the air between the optical filter 4 and the translucent plate 3e is always replaced with outside air. Since it functions as a buffer layer for diffusing heat from the translucent plate 3e and reduces the influence of heat on the optical filter 4, the optical filter is not deteriorated and the insect-proof effect is maintained. In addition, the optical filter 4 can be prevented from being thermally deformed, and is excellent in durability.

That is, in this invention, it is set as the structure which installs an optical filter in the position spaced apart and spaced apart from the instrument main body. With regard to the setting of this gap, considering that the higher the surface temperature of the optical filter, the more likely it is that the UV blocking effect deteriorates, and if the gap is too close, dust, dust, insects, etc. are caught in the gap. It is desirable to install them as far apart as possible, considering that there is a problem. On the other hand, when this lighting fixture is used outdoors at high altitudes, it should be as close as possible to improve safety and durability against wind and rain, reduce the weight of the mounting bracket, and improve the effect of low susceptibility. It is desirable to install.
Considering the above, there is a practically preferable range for the gap, and the size thereof is set in consideration of the above items, the type of discharge lamp to be used, the output, and the like.
Considering these, for example, when a mercury lamp of 400 W or less is used as a discharge lamp, the distance from the radiation port to the optical filter is considered to be set within a range of greater than 0 and 20 cm or less. In particular, in order to avoid the influence of heat in practical use, 0.1 cm or more is more preferable, and 0.3 cm or more is more preferable. Further, when considering a metal structure considering safety against wind and rain, durability, and cost-effectiveness combining these, 10 cm or less is more preferable, and 5 cm or less is more preferable.

In the present embodiment, it is possible to deal with various shapes of the instrument body 3 by selecting the positions of the female screw holes 55a and 55b into which the bolts 53 of the metal fitting 5 are screwed and adjusting the insertion distance.
A method of attaching the metal fitting 5 to the instrument body 3 may be a method of suspending the metal fitting 5 with a wire, a chain, or the like, but the attachment method in the present invention has the following characteristics.
(1) The structure is such that the optical filter will not come off or be damaged even if it receives wind during outdoor use.
(2) At the time of attachment, the optical filter has a structure in which no force is applied by the attachment.
If a force is applied at the time of attachment, the optical filter is deformed, and the interval between the light transmitting plate and the optical filter is reduced, so that it is easily affected by heat from the radiation port.
For example, as shown in FIG. 5, in the case of a structure in which the tip of the bolt 53 is applied and tightened to the position of the shade portion 3 c of the instrument body 3, the metal fitting 5 is inclined and a force is applied to the optical filter. The space between the light transmitting plate 3e and the optical filter 4 is reduced.
Therefore, as in the present invention, the optical filter can be prevented from applying force by sandwiching the radiation port 3d.

<< Second Embodiment >>
Hereinafter, based on FIG. 6, 2nd Embodiment of the lighting fixture which concerns on this invention is described.
Note that, in the embodiments described below, the same reference numerals are given to the components corresponding to the first embodiment shown in FIGS.
FIG. 6 is a perspective view of the lighting fixture 71 of the second embodiment.
The lighting fixture 71 of the present embodiment is different from the first embodiment in that the place to be used is limited to indoors, there is no translucent plate 3e, and the means for attaching the optical filter 4 is different.
In the present embodiment, a cylindrical cover portion 72 is installed on the outer periphery of the optical filter 4 in a direction perpendicular to the surface of the optical filter 4, and the cover portion 72 is arranged around the end of the cover portion 72. Four string-like attachment members 73a to 73d whose one ends communicate with each other, and the other ends of the attachment members 73a to 73d communicate with each other, and are arranged on the outer surface of the reflector portion 3b of the instrument body 3 The attachment member 74 is attached to the instrument body 3.

The inner diameter of the cover portion 72 is larger than the outer diameter of the radiation port 3d of the instrument body 3, and the end of the radiation port 3d and the optical filter 4 are separated from each other. The air in between is circulated with the outside of the luminaire 71.
Moreover, it is preferable to use the same material as the optical filter for the material of the cover portion 72. In this case, ultraviolet rays from between the end of the radiation port 3d and the optical filter 4 do not leak to the outside, and the insect-proof effect is further enhanced.
The materials of the attachment members 73a to 73d, 74 are not particularly limited, but are preferably materials having high heat resistance.
Moreover, the shape of the attachment members 73a to 73d is not limited to a string shape, and may be a chain shape, for example.
Further, the annular attachment member 74 may be an elongated thin plate, a wire or an annular ring.

It is a perspective view which shows the lighting fixture 1 of 1st Embodiment. It is the side view (a) of the lighting fixture 1, and a front view (b). It is sectional drawing of the attachment metal fitting 5 part of the lighting fixture 1. FIG. It is the top view (a), front view (b), and side view (c) of the metal fitting body 51 of the attachment metal fitting 5. It is a figure for demonstrating the advantage of the attachment method of the attachment metal fitting 5. FIG. It is the side view (a) of the lighting fixture 71 of 2nd Embodiment, and a front view (b).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lighting fixture, 2 ... Discharge lamp, 3 ... Appliance main body, 3a ... Socket part, 3b ... Reflector part, 3c ... Shade part, 3d ... Radiation port, 3e ... Translucent plate, 4 ... Optical filter, 5a-5d ... Mounting hardware

Claims (4)

A discharge lamp, a fixture main body that houses the discharge lamp and has a radiation port that emits light from the discharge lamp, and an optical filter that blocks light having a wavelength of 410 nm or less,
The air between the optical filter and the radiation port is circulated to the outside of the lighting fixture at a position apart from the radiation port on the optical path of the light emitted from the radiation port. A luminaire characterized by being installed.   The lighting fixture according to claim 1, wherein a light-transmitting plate is provided at the radiation port.   The lighting fixture according to claim 1 or 2, wherein the discharge lamp is a mercury lamp, a metal halide lamp, or a high-pressure sodium lamp. The lighting fixture according to any one of claims 1 to 3, wherein a filter having a function of reducing illuminance is attached to the optical filter in an overlapping manner.

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