JP2012043676A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of preventing fire spread when a fire breaks out by using a translucent member having a prescribed translucency.SOLUTION: The lighting device 10 is provided with a fixture body 11 composed of a nonflammable material, and a plurality of light source bodies 12 are arranged on the fixture body. Translucent members 14 made of synthetic resin individually cover the light source bodies, and are arranged at prescribed intervals so that each light source body may not be exposed, to prevent fire spread.

Description

  Embodiments described herein relate generally to a lighting device capable of responding to a fire accident such as a vehicle.

  In this type of lighting device for rail vehicles, for example, when a fire accident occurs, there is a risk of igniting a glove made of synthetic resin in particular and spreading one after another to a glove long attached along the ceiling. Yes, the burning standards for railcar lighting cover materials are strictly determined. For this reason, glass cloth-based light-transmitting incombustible sheets have been developed as railcar lighting covers.

JP 2007-197854 A JP 2002-221609 A JP 2001-55646 A JP 2009-40186 A

  However, this type of light-transmitting incombustible sheet has a lower total light transmittance than conventional optical materials used in lighting devices, making it difficult to take advantage of, for example, the characteristics of high-efficiency light-emitting diodes. In addition, it is difficult to maintain the shape of the non-combustible sheet by itself, resulting in poor processability of the instrument and an increase in cost.

  The present invention has been made in view of the above-described problems, and intends to provide a lighting device that uses a translucent member having a predetermined translucency and can prevent the spread of fire when a fire occurs. is there.

  The illuminating device in embodiment of this invention has an instrument main body comprised with an incombustible material, and a some light source body is provided in an instrument main body. The translucent member made of synthetic resin covers each of the plurality of light source bodies and is disposed so as not to expose each light source body with a predetermined interval so as not to spread fire.

  According to this embodiment, it can be expected to provide an illuminating device that uses a translucent member having a predetermined translucency and can prevent the spread of fire when a fire occurs.

BRIEF DESCRIPTION OF THE DRAWINGS The illuminating device which concerns on 1st Embodiment is shown, (a) is a front view, (b) is a side view, (c) is sectional drawing cut | disconnected and expanded along the cc line of this (a) figure . The front view of the illuminating device which concerns on Example 5 in 1st Embodiment. The modification in 1st Embodiment is shown, (a) is a front view, (b) is a side view which shows a part in cross section. The illuminating device which concerns on 2nd Embodiment is shown, (a) is a front view, (b) is a side view, (c) is sectional drawing cut | disconnected and expanded along the cc line of this (a) figure .

  Hereinafter, an embodiment of a lighting device will be described with reference to the drawings.

First embodiment

  The illuminating device of this embodiment constitutes a long baselight-type illuminating device 10 for a railway vehicle, and as shown in FIGS. 1 (a) and 1 (b), an appliance body 11 made of a noncombustible material. , A plurality of light source bodies 12 provided on the instrument body, a support member 13 provided on the instrument body, made of a non-flammable and thermally conductive member, and individually covering the plurality of light source bodies so that no fire spread occurs. The synthetic resin translucent member 14 is disposed at a predetermined interval, is supported so as to be capable of conducting heat to the support member, and is disposed so that each light source body is not exposed. Constitute.

  The instrument main body 11 is configured by pressing a non-combustible material, which is a white color steel plate made of a thin plate in the present embodiment, and has a trapezoidal shape with a shallow cross-sectional shape, and an upper surface portion (a lower surface portion when the instrument is installed on the ceiling). ) Is configured to be a long box. In this embodiment, the instrument body 11 is configured such that the total length L1 is about 1250 mm, the width dimension W1 is about 150 mm, and the height dimension H1 is about 80 mm.

  As shown in FIG. 1C, the light source body 12 includes a solid light emitting element 12a and a circuit board 12b on which the solid light emitting element is mounted. The solid-state light emitting element is configured by a light emitting diode (hereinafter referred to as “LED”) in this embodiment, and the plurality of LED chips are white (day white, daylight, light bulb color) by a phosphor excited by the LED chip. A COB-shaped circular light-emitting portion that emits light. In addition, you may be comprised in the SMD type light emitting module comprised by several LED.

  The circuit board 12b is made of a metal having good thermal conductivity, which is aluminum having a flat plate shape in this embodiment, and copper (copper) on its surface (upper surface in FIG. 1C) via an electrical insulating layer. A wiring pattern made of foil is formed, and a plurality of LED chips 12a are mounted in a matrix on the wiring pattern and filled with phosphors, thereby forming a light source body 12 made of a substantially circular COB type light emitting module. Is done. Each light source body 12 is connected in series to a lighting device 15 including a DC power source and is lit. The lighting device 15 is built in the instrument body 11. The lighting device may be installed separately from the appliance body.

  The support member 13 is a nonflammable and thermally conductive member, and in this embodiment, the support member 13 is made of a metal or ceramic having a thickness dimension t1 of about 1 mm or more, and can close the open upper surface portion of the instrument body 11. Thus, it is formed in a long flat plate shape. The support member 13 is formed with a plurality of support holes 13a for supporting the light source body 12 with predetermined intervals at substantially equal intervals. The support hole 13a forms a screw thread (female screw) on the inner surface of the hole.

  Then, the circuit board 12b is fixed to the back surface side of the support member 13 by a fixing means such as a screw so that the circular light emitting part of the light source body 12 faces the support hole 13a. At this time, a sheet having thermal conductivity and electrical insulation, such as silicone resin, is interposed, and the circuit board and the support member are electrically insulated and fixed. Thereby, the light source body 12 is arranged on the support member 13 with a predetermined interval, and the heat generated by the LED 12a is effective from the support member 13 having thermal conductivity and the steel plate body 11 to the outside. Heat is released.

  The translucent member 14 is made of translucent synthetic resin, in this embodiment, milky white PC (polycarbonate) resin that is also widely used as a glove material for lighting fixtures. Transparent PMMA (acrylic) resin may be used. The translucent member 14 is formed by projecting in a bowl shape integrally with the translucent portion 14a formed in a circular dome shape so as to individually and independently cover the light source bodies 12, and the opening of the translucent portion. It consists of a mounting part 14b. In this embodiment, the diameter dimension φ1 of the translucent member 14 exposed to the outside is the outer diameter dimension of the mounting portion 14b. Further, the mounting portion is formed with a screw (male screw) that can be screwed into a screw thread formed in the support hole 13a of the support member 13 on the outer peripheral surface thereof.

  The translucent member 14 configured as described above individually covers the plurality of light source bodies 12 and has a predetermined interval so that the fire spread does not occur, and is disposed so that each light source body 12 is not exposed. And supported so that heat conduction is possible with respect to the support member 13. That is, the attachment portion 14b of the translucent member 14 is screwed into the support hole 13a and fixed to each support hole 13a of the support member 13 on which the plurality of light source bodies 12 are supported. Thereby, the plurality of light source bodies 12 are individually covered by the translucent member 14 and arranged so that each light source body is not exposed. At the same time, the mounting portion 14b is screwed into the support hole 13a, so that the translucent member 14 is thermally in close contact with the support member 13 and the heat of the translucent member 14 (heat during combustion) is increased. The support member 13 made of a conductive metal is supported so as to be able to conduct heat to the instrument body 11 via the support member.

  Further, the interval dimension a between adjacent translucent members 14 (in this embodiment, the dimension between the outer diameters of the mounting portions 14b of the adjacent translucent members 14) is φ1 or more when φ1 is 40 mm or less. When φ1 is 40 mm or more, it is configured to be 40 mm or more. This interval dimension a is set by the interval dimension of each support hole 13a.

  As described above, the long baselight-type lighting device 10 for a railway vehicle is configured. This illuminating device is configured as an illuminating device using a LED as a light source, which can obtain FL40W1 of a fluorescent lamp fixture or a luminous flux for two lamps with a total luminous flux. And this illuminating device is used by connecting and installing two or more units | sets along the longitudinal direction with respect to the ceiling surface of a vehicle.

  In this embodiment, the support member 13 is made of an aluminum plate (thermal conductivity: 236 W / m · K) in the lighting device configured as described above. The thickness dimension t1 of the aluminum plate is about 2 mm, the diameter dimension φ1 of the translucent member 14 is about 40 mm, and the interval dimension a between the adjacent translucent members 14 is about 40 mm. went. That is, when a PC-made translucent member 14 was subjected to a combustion test using an ethanol-based igniting agent (1 g), the fire spread to the adjacent PC-made translucent member 14 and resin drip (melting dripping) phenomenon. Was not recognized. Furthermore, there was no continuation of combustion, and the fire was extinguished quickly when the ignition agent burned out.

  This is because a plurality of light source bodies 12 are arranged on a nonflammable aluminum support member 13 and a light transmissive member 14 is provided independently of each light source body and with a predetermined interval. Even if a single translucent member is ignited, the heat is transmitted to the support member 13 made of aluminum having good thermal conductivity and further to the instrument main body 11, and between the adjacent translucent members is non-combustible. Therefore, it is possible to prevent the spread of light to the adjacent translucent member. At the same time, since the heat escape to the support member 13 narrows the range of the molten resin temperature, the resin drip phenomenon does not occur. In addition, the continuity of combustion is lost. Further, the thermal conductivity of the support member 13 and the instrument body 11 greatly depends on the continuity of combustion, and these phenomena are less likely to occur when the aluminum plate thickness is increased. Even when non-flame retardant PMMA resin was used instead of PC resin, there was no fire spread to adjacent translucent members, resin drip, and continuity of combustion.

  In this embodiment, in the lighting device configured as described above, the support member 13 is formed of a white color steel plate (thermal conductivity: 84 W / m · K) made of a thin plate similar to the instrument body 11. The combustion test was performed by setting the thickness t1 of the steel sheet to about 2 mm, the diameter dimension φ1 of the translucent member 14 to about 40 mm, and the interval dimension a between the adjacent translucent members 14 to about 50 mm. That is, when the combustion test of the translucent member 14 made of PC was performed using an ethanol-based igniting agent (1 g), as in Example 1, the spread of fire to the adjacent translucent member 14 made of PC, resin The drip phenomenon and continuity of combustion were not observed. The same was true when non-flame retardant PMMA resin was used instead of PC resin.

  In addition, the illuminating device in a present Example makes the upper surface part of the instrument main body 11 itself which consists of a color steel plate as a supporting member, without comprising a special supporting member, and covers the light source body 12 and this light source body separately. The translucent member 14 can be disposed, and a lighting device using a steel plate that is advantageous in terms of cost can be configured as a whole.

  In the present embodiment, in the lighting apparatus configured as described above, the support member 13 is formed of a ceramic plate made of aluminum nitride (thermal conductivity: 150 W / m · K). The combustion test was performed with the thickness t1 of the ceramic plate being about 2 mm, the diameter dimension φ1 of the translucent member 14 being about 40 mm, and the spacing dimension a between the adjacent translucent members 14 being about 45 mm. That is, when the combustion test of the translucent member 14 made of PC was performed using an ethanol-based igniting agent (1 g), as in Example 1, the spread of fire to the adjacent translucent member 14 made of PC, resin The drip phenomenon and continuity of combustion were not observed. The same was true when non-flame retardant PMMA resin was used instead of PC resin.

  In this embodiment, the supporting member 13 is formed of a copper plate (thermal conductivity: 398 W / m · K) in the lighting device configured as described above. The thickness t1 of the copper plate is about 1 mm thinner than those of Examples 1 to 3, the diameter dimension φ1 of the translucent member 14 is about 30 mm, and the interval dimension a between adjacent translucent members 14 is about 30 mm. went. That is, when the combustion test of the translucent member 14 made of PC was performed using an ethanol-based igniting agent (1 g), as in Example 1, the spread of fire to the adjacent translucent member 14 made of PC, resin The drip phenomenon and continuity of combustion were not observed. The same was true when non-flame retardant PMMA resin was used instead of PC resin.

  As is clear from each of the above-described embodiments, the translucent member 14 does not have non-flammability, and is a translucent member made of PC resin or PMMA resin that has been widely used in the glove of a lighting device. However, if the distance a between the adjacent translucent members 14 is equal to or larger than the diameter dimension φ1 of the translucent member 14, the possibility of spreading to the adjacent translucent members is extremely low, and the resin drip phenomenon It was found that continuity of combustion did not occur. This is considered to be because heat is easily conducted to the support member 13 when the diameter dimension φ1 is 40 mm or less, and the temperature rise of the translucent member 14 is suppressed. In addition, it is preferable to use aluminum as the support member 13 in consideration of heat conduction performance, the weight of the entire apparatus, cost factors, etc., in this type of lighting device, and the distance dimension a is about 40 mm or more. It is preferable to do.

  Moreover, if the thickness dimension of a support member is about 1 mm or more, the temperature rise of the translucent member 14 can be suppressed, and about 2 mm or more is preferable when heat conduction performance, the intensity | strength of the whole instrument, etc. are considered. It turned out to be. Further, the upper limit is about 5 mm, and about 4 mm is a preferable upper limit considering the heat conduction performance, the weight of the entire instrument, cost factors, and the like.

  In this embodiment, as shown in FIG. 2, in the illumination device configured as described above, the diameter dimension φ1 of the translucent member 14 is about 150 mm, and the distance dimension a between the adjacent translucent members 14 is about 40 mm. Configured. This diameter dimension is a dimension equivalent to the width dimension of the instrument body 11, and in this embodiment, the diameter dimension φ1 of the translucent member 14 is 40 mm or more, and the interval dimension between the adjacent translucent members 14 is. a is separated by 40 mm or more.

  In the above lighting device, similarly to Examples 1 to 4 described above, the support member 13 was a color steel plate, a ceramic plate, an aluminum plate, and a copper plate, and the same combustion test was performed. As in Example 1, Continuity of fire spread and combustion to the adjacent translucent member 14 made of PC was not recognized. The same was true when non-flame retardant PMMA resin was used instead of PC resin.

  This is because even if one translucent member burns, the flame does not reach the translucent member that is separated by 40 mm or more and is radiated to the instrument body side even if heat is transmitted. it is conceivable that.

  As described above, according to the present embodiment, the use of a translucent member having a predetermined translucency such as PC resin or PMMA resin eliminates the spread of fire in the event of a fire, the drip phenomenon of the resin, and the continuity of combustion, and the expansion damage For example, it is possible to provide a lighting device suitable for vehicles such as railways and buses. Further, it is possible to provide a lighting device capable of dissipating heat generated from a light source body using a support member having thermal conductivity during normal lighting, and capable of suppressing a decrease in luminous efficiency. Can do.

  In addition, it is possible to use PC resin, PMMA resin, and the like that have been widely used without using a light-transmitting incombustible sheet having a low total light transmittance as a light-transmitting member constituting a globe. It becomes possible to make full use of the characteristics of the efficient light-emitting diode. In addition, the incombustible sheet itself was difficult to maintain its shape, and it was a factor that pushed up costs due to poor processability to equipment. However, these processability and cost problems could be solved at once and the degree of freedom in design. Therefore, it is possible to provide a lighting device that is high in cost, advantageous in cost, and excellent in safety even in the event of a fire.

  In this embodiment, as described in Example 2, the translucent member 14 may be disposed on the instrument body 11 itself without being disposed on a special support member. Moreover, you may comprise a light source body with the lamp | ramp with a bulb | ball shape which used LED as the light source. In the lighting device shown in FIG. 3, a lamp 30 with a base having an outer diameter φ2 of about 43 mm is arranged with respect to an aluminum support member 13 so that an adjacent interval dimension a is about 40 mm. The lower surface of the globe 31 is supported in close contact with the support member 13, and the same operational effects as those of the first embodiment can be achieved. In FIG. 3, 32 is a socket for mounting the lamp 30 with the cap, and is supported by the bottom plate of the instrument body 11, and by screwing the cap of the lamp with the cap into the socket 32, the lower surface of the globe 31 has a mortar shape. It is attached in close contact with the formed support hole 13a.

  Furthermore, in this embodiment, the light source of the light source body is composed of LEDs, so that it generates less heat than incandescent bulbs and mini-krypton bulbs, spreads fire in the event of a fire, resin drip phenomenon, and continuity of combustion. However, the light source body is not limited to the LED, and is likely to be restricted in height and the like, but is composed of an incandescent bulb or a mini-krypton bulb. Also good. Further, the light source body may be constituted by a solid light emitting element such as a semiconductor laser or an organic EL instead of the LED. The shape of the light source body may be a polygonal shape such as a quadrangle or an elliptical shape instead of a round shape.

  In addition, the support member 13 is configured to easily transmit heat generated from the LED, so that it is possible to improve heat conduction performance for preventing fire spread in a fire and heat radiation performance of the LED during normal lighting. . For example, the heat conductivity and heat radiation performance may be further improved by processing the surface of the support member 13 into a wave shape to form a heat radiation fin or coating with a high heat radiation paint having a high infrared absorption rate.

  Moreover, although the translucent member 14 was comprised so that a single light source body might be covered independently each other, when a several light source body was grouped and comprised as a single light source body, as a group, You may comprise so that the comprised light source body may be covered independently, and the number of the light source bodies covered with a translucent member is not limited to the specified number. Furthermore, although the translucent member was arrange | positioned linearly along the longitudinal direction, for example, you may arrange | position in zigzag form etc. and is not limited to the arrangement | positioning specified regularly. In addition, it is preferably arranged at substantially equal intervals, but may be arranged at different intervals as long as it has a predetermined interval dimension.

Embodiment 2

  In the present embodiment, instead of the translucent member 14 constituting the globe of the first embodiment, a translucent member made of a block-shaped light guide 20 made of a transparent or translucent synthetic resin is used. It is an illuminating device that is provided on the support member so as to cover the light source bodies individually and have a predetermined interval so that the spread of fire does not occur so that each light source body is not exposed. Hereinafter, the configuration will be described with reference to FIG. 4 with the same reference numerals assigned to the same portions as those in the first embodiment and the detailed description of the common portions omitted.

  The instrument main body 11, the light source body 12, and the support member 13 have the same configuration as in the first embodiment, and the light guide 20 has a block width dimension x of about 20 mm or less and is inclined with respect to the longitudinal direction of the instrument main body 11. The support member 13 is fixed to the support hole 13a. In this case, the light guide 20 and the support hole 13a are bonded using an adhesive made of silicone resin or epoxy resin having good thermal conductivity so that the heat of the light guide 20 can be transmitted to the support member 13 satisfactorily. It is good to configure. In this embodiment, the overall length L1 of the instrument body 11 is about 1250 mm, the width dimension is about 150 mm, and the height dimension H1 is about 50 mm.

  In the lighting device configured as described above, the light guide 20 is configured in a block shape with non-flame retardant PMMA resin having a block width dimension x of about 20 mm and a longitudinal dimension of about 250 mm. A similar combustion test was conducted. That is, the supporting member is made of an aluminum plate having a thickness of about 2 mm, the distance a between adjacent light guides is set to about 40 mm (Example 6), and the supporting member is made of a color steel plate having a thickness of about 2 mm. The spacing dimension a between the light guides is about 50 mm (Example 7), the supporting member is a ceramic plate having a thickness of about 2 mm, and the spacing dimension a between adjacent light guides is about 45 mm (implemented) Example 8), the supporting member is a copper plate having a plate thickness of about 1 mm, and the interval dimension a between adjacent light guides is set to about 30 mm (Example 9), respectively, and an ignition agent (1 g) is used. As a result of the combustion test, as in Examples 1 to 4, the spread of fire to the adjacent PMMA translucent member 14, the resin drip phenomenon, and the continuity of combustion were not observed.

  Thereby, even if it is a light guide made of PMMA that does not have nonflammability, if the block width is about 20 mm or less, the resin drip phenomenon and the continuity of combustion do not occur, and the interval dimension a is set to 40 mm or more. Thus, the possibility of fire spread was found to be extremely low.

  Other configurations, operations, operational effects, modifications, and the like in this embodiment are the same as those in the first embodiment. As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to each above-mentioned embodiment, A various design change can be performed in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 10 Illuminating device 11 Instrument main body 12 Light source body 13 Support member 14 Translucent member

Claims (3)

An instrument body composed of incombustible material;
A plurality of light source bodies provided in the instrument body;
A synthetic resin-made translucent member that individually covers a plurality of light source bodies and is disposed so as not to expose each light source body with a predetermined interval so as not to spread fire;
An illumination device comprising: An instrument body composed of incombustible material;
A plurality of light source bodies provided in the instrument body;
A support member provided on the instrument body and made of a non-combustible and thermally conductive member;
A plurality of light source bodies are individually covered, and the exposed portion has a diameter dimension of 40 mm or less, and is disposed with an interval equal to or greater than the diameter dimension so that heat can be conducted to the support member. A synthetic resin-made translucent member disposed so as to be supported so that each light source body is not exposed;
An illumination device comprising: The lighting device according to claim 1, wherein the translucent member has an interval between adjacent translucent members of about 40 mm or more.

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