JP4720539B2 - Explosion-proof lighting device - Google Patents

Description

  The present invention relates to an explosion-proof lighting device including a flameproof, safety-enhanced, or hermetic lighting fixture used in a special environment.

In general, as an explosion-proof illumination device used in a special environment, an illumination device in which a fluorescent lamp is housed in a space sealed by a cylinder is known (for example, Patent Document 1).
JP 11-53929 A

However, this type of fluorescent lamp is a diffusing type and leaks light. Even if a reflector is used, an efficient light distribution characteristic cannot be obtained, and so-called light loss occurs. In addition, since the fluorescent lamp has a short lamp life, it is not easy to maintain.
Therefore, an object of the present invention is an explosion-proof illumination device in which a light source is housed in a space sealed by a cylinder, which has excellent light distribution characteristics, low so-called light loss, and extremely good maintainability. The object is to provide a lighting device.

The present invention is an explosion-proof lighting device used in a special environment, and is held between a pair of cylinder holders (8, 9) made of a member having excellent thermal conductivity and a pair of cylinder holders (8, 9). A cylinder (11) and a support (13) made of a member having excellent thermal conductivity disposed in the cylinder (11), and the cylinder holder (8, 9) is connected to the cylinder holder body (22) and the cylinder holder. A lid member (25) screwed to the main body (22), and the support (13) is clamped from both sides by a lid member (25) screwed to the pair of cylinder holder main bodies (22). (11) is supported on the sealed space in this support (13) combined optical axis substantially radial direction relative to the center of the cylinder section mounting a plurality of LED light sources (15) Rutotomoni, lid member (25) Wherein the ED light source (15) a support (13) that has each drawable configured.

  In the present invention, since a light source is not a diffusion type such as a fluorescent lamp, but an LED is used, it is difficult for leakage light to occur, and this LED emits light in a substantially radial direction with respect to the center of the cylinder cross section. Since the axes are aligned, there is little irregular reflection of light passing through the cylinder, excellent light distribution characteristics are obtained, so-called light loss is low, and furthermore, the use of an LED light source has a long life and maintenance. Improves.

  In this case, the plurality of LED light sources may be narrow-angle LEDs, and wide-angle LEDs may be arranged on both sides and / or the center. Further, the number of narrow-angle LEDs may be approximately equal to or more than the number of wide-angle LEDs.

In this case, the support may have a V-shaped cross section, and the LED light source may be attached to each adjacent attachment surface.
According to this configuration, since the plurality of LED light sources are attached to the adjacent attachment surfaces of the support having a V-shaped cross section, the plurality of LED light sources can be connected to the center of the cylinder cross section simply by inserting the support into the cylinder. As a reference, it is possible to easily attach the optical axis in the radial direction so that the assemblability can be improved. In addition, since the support has a V-shaped cross section, the optical axes of the plurality of LED light sources are arranged at an appropriate angle with each other, so that an illumination device having excellent so-called light distribution characteristics is provided.

  Moreover, you may integrally form a radiation fin in the said support body. Furthermore, you may provide the reflector which diffuses the light of an LED light source in the said support body. Further, the support and the cylinder holder may be a heat radiator.

  According to the present invention, a support is disposed in a space sealed by a cylinder, and a plurality of LED light sources are attached to the support with the optical axis aligned substantially in the radial direction with respect to the center of the cylinder cross section. It is excellent in that it has a low so-called light loss and has improved maintainability.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1A and 1B show an explosion-proof illuminating device according to an embodiment of the present invention. Reference numeral 1 denotes an illuminating device main body, and the illuminating device main body 1 is supported by a ceiling 4 such as a tunnel via a pair of suspending tools 2 and 3. The mounting height is 2.5 m, the mounting interval of the instruments is 15 m, and the horizontal plane average illuminance is 1 lux. A connection box 5 is disposed on the hanging tool 3, and a power supply line (not shown) introduced into the connection box 5 is connected to the power supply device 6 of the illuminating device main body 1 by wiring not shown. .

  A reflector 7 is supported on the lower surface of the luminaire main body 1, and a pair of cylinder holders 8, 9 are disposed at both ends of the luminaire main body 1, located inside the reflector 7. The LED light source chamber 10 is supported between the nine.

  The LED light source chamber 10 according to the present embodiment is a so-called explosion-proof type, and is made of aluminum disposed in a cylindrical thick glass cylinder 11 and a space 12 (see FIG. 3) sealed by the cylinder 11. , And a plurality of LED light sources 15, 15... 15 attached to the support 13. The glass cylinder 11 is, for example, a protective tube for an LED light source having an outer diameter of 50 mm, an inner diameter of 40 mm, and a thickness of 5 mm, and having translucency, and is made of, for example, hard glass.

FIG. 2 is a cross-sectional view of the cylinder holder.
Since the pair of cylinder holders 8 and 9 have substantially the same structure, for convenience of explanation, one cylinder holder 9 will be described as an example. The cylinder holder 9 includes a cylinder holder body 22 made of a material having excellent thermal conductivity, which is fixed to the lighting apparatus body 1 via screws 21, and a power source device is provided in the hollow portion 23 of the cylinder holder body 22. 6 faces the wiring section 24 that guides the wiring from 6. One opening 23A connected to the hollow portion 23 is closed by screwing the lid member 25, and the support 13, the cylinder 11 and the annular packing 26 are provided in the other opening 23B from the opening center side. The fixing agent 27 is fitted between the cylinder 11 and the inner wall of the opening 23B.

  The end portion of the support 13 is fixed to the flange 28 </ b> A of the T-shaped holder 28 via a screw 29. When the protrusion 25A of the lid member 25 is brought into contact with the end of the T-shaped holder 28 and the lid member 25 is slowly screwed into the one opening 23A of the cylinder holder body 22, The support 13 is sandwiched from both sides by the lid members 25 of the pair of cylinder holders 8 and 9 and supported between the cylinder holder main bodies 22. Since the support body 13 and the cylinder holder 9 are excellent in thermal conductivity, they are heat radiators.

The wiring 31 extending from the plurality of LED light sources 15, 15... 15 attached to the support 13 has a connector 32 at the end, and the connector 33 connected to the connector 32 extends from the wiring section 24. Connected to the wiring 34.
During the maintenance of the LED light sources 15, 15... 15, the lid member 25 is removed, the connectors 32 and 33 are disconnected, and the support 13 is pulled out in one direction. This maintenance work has been reduced.

  As shown in FIG. 3, the metal support 13 has a V-shaped cross section, and attachment surfaces 13 </ b> A and 13 </ b> B are formed on each side having the same length. A plurality of LED light sources 15 are attached to the attachment surfaces 13A and 13B at substantially equal intervals in the longitudinal direction of the support 13. These LED light sources 15 are arranged mainly with narrow-angle LEDs. For example, a wide-angle LED may be partially arranged on both sides and / or the center, or all narrow-angle LEDs may be arranged. It is desirable that the number of narrow-angle LEDs in this arrangement is almost the same as or larger than the number of wide-angle LEDs. In general, since an LED light source has a small amount of light, it is desirable to increase directivity with a narrow-angle LED and irradiate a portion close to the light source, for example, a position directly under the illumination device, with a wide-angle LED over a wide range.

  In this case, each LED light source 15 is attached with the optical axis P aligned substantially in the radial direction with reference to the center O of the cylinder cross section, as shown. In this configuration, the angle (vertical angle) θ formed by the mounting surfaces 13A and 13B is 90 °, and the irradiation angle θ1 of the LED light source 15 is 45 °. Note that the LED light source 15 can be used by being attached only to the attachment surface 13A or 13B on one side, for example, depending on the intended use. The cylinder 11 is not limited to glass but may be made of resin, for example.

  The LED light source 15 is attached to a single plate 16 having excellent thermal conductivity, and is fixed by, for example, a screw 17. As another form, a plurality of LEDs may be molded on a single plate, and this plate may be arranged in the longitudinal direction of the support 13 and fixed to the mounting surfaces 13A and 13B with screws, for example. Good.

  The remaining side is curved in the cross section of the support body 13, and a plurality of heat radiation fins 13C are integrally formed on the curved side. The support 13 is provided with a pair of reflectors 13C and 13D. The reflectors 13C and 13D are coated with a white surface, reflect light from the LED light source 15, and transmit the light to the instrument. Diffuse in the direction of light irradiation.

  FIG. 4 shows another configuration. In this configuration, the angle (vertical angle) θ formed by the mounting surfaces 13A and 13B formed on the support 13 is 50 °, and the irradiation angle θ1 of the LED light source 15 is 65 °. In the present embodiment, the irradiation angle θ1 of the LED light source 15 can be determined by appropriately defining the apex angle θ of the support 13. Accordingly, accurate light distribution can be easily obtained by appropriately setting the apex angle θ in consideration of the light distribution of illumination.

5-7 shows another form of the support.
The support 113 in FIG. 5 has a substantially isosceles triangular cross-section, light source mounting surfaces 113A and 113B are formed on each equal side, and heat radiation fins 113C are integrally formed on the remaining sides. 6 has a substantially V-shaped cross section, light source mounting surfaces 213A and 213B are formed on each equal side, and heat radiation fins 213C are formed on the inner sides of these sides. The support body 313 in FIG. 7 has substantially the same structure as the support body 213 in FIG. 6, and is different in that the shape of the heat radiation fin 313C is a triangular tooth shape.
Regardless of which support is used, the optical axis P of the LED light source 15 fixed to the mounting surface is arranged in the sealed space of the cylinder so as to be aligned substantially in the radial direction with respect to the center O of the cylinder cross section. The point to support is common.

In the explosion-proof lighting fixture having the above configuration, since the LED light source 15 is used as a light source, the lifetime is remarkably improved as compared with a fluorescent lamp or the like. Therefore, maintainability is improved, and labor related to maintenance work can be reduced under a special environment. Moreover, since the LED light source 15 is a spot light source type (narrow angle type), there is little light leakage, light loss is reduced, and an excellent light distribution property is provided. Further, since the LED light source 15 is mounted with the optical axis P aligned substantially in the radial direction with the center O of the cylinder cross section as a reference, the light passing through the cylinder 11 travels straight, and irregular reflection is reduced. Loss is reduced.
Inside the hollow portion 23 of the cylinder holder main body 22, the wiring 31 extending from the narrow-angle LED light sources 15, 15,... 15 is connected to the wiring 34 extending from the wiring portion 24 via the connectors 32, 33. At the time of maintenance, the lid member 25 is removed, the connectors 32 and 33 are disconnected, and the support 13 can be pulled out in one direction, so that the maintenance work can be further reduced.

FIG. 8 shows another embodiment.
In this configuration, two LED light source chambers 10 and 10 having substantially the same structure as that of the above-described embodiment are supported in parallel inside the reflecting plate 7. In this case, the two LED light source chambers 10 and 10 may be illuminated together as shown in FIG. 9A according to the lighting conditions, and the outside of the two LED light source chambers 10 and 10 as shown in FIG. 9B. Only the direction may be illuminated, or only one side of the two LED light source chambers 10 and 10 may be illuminated in the same direction as shown in FIG. 9C.

  While the present invention has been described based on one embodiment, the present invention is not limited to this, and various modifications can be made. For example, in the above-described embodiment, the explosion-proof illuminating device used in a special environment has been described. However, the present invention can be applied to a safety-explosion-proof illuminating device or a sealed luminaire.

A is a front view showing an embodiment of the present invention, and B is an end view thereof. It is sectional drawing of a cylinder holder. It is sectional drawing of a lighting fixture. It is sectional drawing of the lighting fixture of another example similarly. It is sectional drawing of a support body. It is sectional drawing of a support body. It is sectional drawing of a support body. It is an end elevation figure showing another embodiment. A, B, and C are diagrams each showing an illumination state of the illumination device.

Explanation of symbols

8, 9 Cylinder holder 10 Lighting fixture 11 Cylinder 13 Support body 13A, 13B Mounting surface 15 LED light source

Claims (7)

Explosion-proof lighting equipment used in special environments,
A pair of cylinder holders (8, 9) made of a member having excellent thermal conductivity, a cylinder (11) held between the pair of cylinder holders (8, 9), and heat conduction disposed in the cylinder (11) And a support (13) made of a member having excellent properties,
The cylinder holder (8, 9) includes a cylinder holder body (22) and a lid member (25) screwed into the cylinder holder body (22),
The support (13) is supported in a space that is nipped from both sides by a lid member (25) screwed into a pair of cylinder holder bodies (22) and sealed by a cylinder (11) ,
The support (13) to the combined optical axis substantially radial direction relative to the center of the cylinder section mounting a plurality of LED light sources (15) Rutotomoni, a plurality of LED light sources to remove the cover member (25) (15) An explosion-proof illumination device characterized in that the support body (13) can be pulled out . The plurality of LED light sources are mainly narrow-angle LEDs,
2. The explosion-proof illumination device according to claim 1, wherein wide-angle LEDs are arranged on both sides and / or the center.   The explosion-proof illumination device according to claim 2, wherein the number of narrow-angle LEDs is substantially equal to or more than the number of wide-angle LEDs. The support has a V-shaped cross section;
The explosion-proof illumination device according to any one of claims 1 to 3, wherein the LED light source can be attached to each of adjacent attachment surfaces.   The explosion-proof illumination device according to any one of claims 1 to 4, wherein a radiation fin is integrally formed on the support.   6. The explosion-proof illumination device according to claim 1, further comprising a reflector that diffuses light from the LED light source on the support.   The explosion-proof illumination device according to any one of claims 1 to 6, wherein the support and the cylinder holder are heat radiators.

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