JPH0561917U - Downlight - Google Patents

Abstract

(57) [Abstract] [Purpose] Prevents the risk of a fire igniting the heat insulating material in the ceiling due to the heat of the downlight that is embedded in the ceiling, and the equipment and heat insulating material that were conventionally used. (EN) Provided is an improved downlight capable of omitting a complicated work such as a construction in which it is separated from each other. A downlight in which a heat insulating coating 9 made of heat resistant fiber is provided on a surface 8 of a body 2 that houses a lamp 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to the improvement of downlights (usually small lighting fixtures embedded in the ceiling) used in houses, buildings, stores, hotels, meeting rooms, etc.

[0002]

[Prior Art]

 Downlights, which have a relatively new history in Japan and began manufacturing after the Second World War, produced changes in the architectural structure and development of the architectural sense of the architectural space, as well as the production of light as part of the quality improvement of lighting. Due to demand for effects, etc., the amount used recently has been increasing. Initially, it was embedded in the ceiling with plenty of room and was dissipated into the ceiling, so no accidents caused by the downlight heat occurred. After that, from the viewpoint of construction, the structure with economical efficiency was adopted to narrow the space in the ceiling, and from the viewpoint of energy saving, the method of putting a heat insulating material inside the ceiling or inside the wall became common. For this reason, the downlight embedded in the ceiling overheated with the futon wrapped with the heat insulating material, and the flammable surface material of the heat insulating material ignited, resulting in a fire.

[0003] Manufacturers of lighting fixtures endeavor to familiarize themselves with construction instructions that require separation between fixtures and heat insulators by using instruction manuals, etc., or develop fixtures that do not overheat when covered with heat insulators. Etc. are being taken.

[0004]

[Problems to be solved by the device]

 Equipment that was developed as a measure to prevent fire accidents caused by downlights and that does not overheat even if covered with heat insulating material must use lamps with limited light intensity or light quality because it is necessary to suppress heat generation to a minimum. There is a real problem that we cannot meet the demand for various types of high quality lighting that has been demanded in recent years. On the other hand, fixtures that can meet the requirements for high-quality lighting are unavoidably overheated due to the use of lamps that generate a large amount of heat, and the fixtures and heat insulating materials must be installed apart from each other. Although the instructions warn the contractor, due to problems such as the quality of the contractor, it cannot be said that the precautions are always followed. For this reason, accidents due to overheating of downlights are still endless.

The present invention is a downlight in which a fixture is embedded in a ceiling, and when the fixture is overheated by the heat of the lamp, the risk of fire is high. It is an object of the present invention to provide an improved downlight that does not require the separation of the fixture and the heat insulating material at the time of construction, even though it is a type that requires the fixture and the heat insulating material to be installed separately.

[0006]

[Means for Solving the Problems]

 This invention consists of a downlight in which a heat-insulating coating made of heat-resistant fiber is provided on the surface of the housing that houses the lamp.

The heat-resistant fiber of the present invention is preferably a fiber that can withstand a high temperature of at least about 200 ° C. or higher, such as aramid fiber, carbon fiber, glass fiber, and ceramic fiber. Aramid fibers are known as trade names such as Conex Technora (both manufactured by Teijin Limited), Nomex Kevlar (both manufactured by DuPont), and Apiel (manufactured by Unitika Ltd.). Aramid fiber has excellent heat resistance at about 400 ° C, has low thermal conductivity, and has excellent processability such as spinnability and knitting and weaving properties. Felt processing using a needle punch is also easy. Carbon fibers, glass fibers, ceramic fibers, etc. have a slightly higher thermal conductivity than aramid fibers and are not as good in processability, but have good heat resistance and can be used in this invention.

The heat-insulating coating of heat-resistant fibers may be provided by covering fabrics such as textiles, knits, felts, etc. so as to cover the entire surface of the downlight body or the main part thereof, and the surface of the body may be heat-resistant. It is also possible to apply heat-resistant short fibers by applying the above adhesive to provide a heat-insulating coating. It is also possible to separately provide a sheath with a heat insulating coating and detachably cover the vessel to provide the heat insulating coating.

[0009]

【Example】

 FIG. 1 is a partially cutaway front view showing a first embodiment, and FIG. 2 is a plan view. FIG. 3 is a sectional view taken along the line AA of FIG. The downlight 1 has a structure in which a cylindrical metal body 2 and a shade 4 and a lamp 3 are housed inside. The lamp 3 is held in a socket 5 and connected to a power source (not shown) by a lead wire 6. The surface 8 of the body 2 is provided with a heat insulating coating 9 made of heat resistant fiber. The heat-insulating coating 9 in this example is formed of a tubular aramid fiber ridge knitted fabric. Since the ridge knitted fabric has a large elasticity, a force for tightening the body 2 is exerted, so that it can be covered and fixed to the body 2 without using any special means.

FIG. 4 shows a state in which a hole 11 is provided in the ceiling 10 and the downlight 1 of this embodiment is embedded therein, and the downlight 1 is covered with a mat-like glass wool heat insulating material 12 for construction. In this example, when the surface temperature (point A) of the body 2 is 220 ° C., the surface temperature of the heat insulating coating 9 (point B) is 185 ° C., and the inner surface temperature of the heat insulating material 12 (point C) is 180 ° C. Atsuta On the other hand, in the conventional technique in which the heat insulating coating 9 was not provided, the point C was 215 ° C. when the point A was 220 ° C. Since the flammable surface covering material 13 of the heat insulating material 12 undergoes thermal decomposition at about 200 ° C. and generates a flammable gas, there is an extremely high risk of fire in the prior art, and there is almost no risk of fire in the present invention. It can be said that the safety is high.

FIG. 5 is similar to FIG. 3 of the embodiment in which the heat insulating coating 9 is fixed to the body 2 by the hook 14 when the heat insulating coating 9 made of a woven fabric, knitted fabric, felt or the like having low elasticity is provided. FIG. FIG. 6 is an enlarged view of the circle in FIG. 5, in which the hook 14 is provided with two legs 16 and 16 on the head 15, and the legs 16 and 16 are provided on the heat insulating coating 9 and the body 2, respectively. The ends are bent and fixed through the holes 17 and 18.

FIG. 7 shows an embodiment in which the heat insulating coating 9 is fixed by covering the surface 8 of the body 2 with a fastener 19. FIG. 8 is an enlarged view of the circle in FIG. 7. The fasteners 19 are sewn to the left and right heat insulation coatings 9 by the sewing threads 20 and 20, and the left and right heat insulation coatings 9 are engaged by the engagement of the worms 21, 21 ... Are integrated.

FIG. 9 shows an embodiment in which the heat insulating coating 9 is fixed by covering the surface 8 of the body 2 with Velcro tapes 23. FIG. 10 is a partially enlarged view of a cross section taken along the line BB of FIG. 9, in which the hard portion 24 and the soft portion 25 of the magic tape 23 are attached on the heat insulating coating 9 with the joint 22 of the heat insulating coating 9 interposed therebetween. The hooks 26 ... Enclose the piles 27 ... and the hard portion 24 and the soft portion 25 are integrally fixed.

FIG. 11 is a plan view of the heat insulating coating 9 of the embodiment of the perspective view shown in FIG. The heat insulating coating 9 is composed of a cylindrical portion 31, a head portion 30, and a fitting margin 28. The head portion 30 is made up of a large number of trapezoids, and when 31 is rolled into a cylindrical shape, the head portion 30 is bent toward the crown portion side of the body 2 to form joints 33. The cylindrical portion 31 is formed by abutting the fitting margins 28, 28 on a plane and integrating the facing holes 29, 29 through the hooks 14. FIG. 13 is a partially enlarged view of a cross section taken along the line CC of FIG. In the drawing, 32 is a mating surface, 15 is a hook head, and 16 is a hook foot. The butt fixing of the mating margins 28, 28 can also be performed by using eyelets, velcro, etc., although not shown in the drawings other than the hook 14.

FIG. 14 shows an embodiment in which the heat-resistant fiber pile knitted fabric 34 is used as the heat insulation coating 9. FIG. 15 is a partially enlarged view of a cross section taken along the line DD of FIG. The pile knitted fabric 34 covers the body 2 with the pile portion 35 facing the surface 8 of the body 2 and the ground knitting portion 36 facing outward. In this embodiment, the heat insulating coating 9 contacts the surface 8 of the body 2 only at the tip of the pile portion 35, and since the pile portion 35 contains a large amount of air, the heat of the body 2 is prevented. The effect of blocking is great. Although illustration is omitted, contrary to this embodiment, the knitted fabric portion 36 of the pile knitted fabric 35 may contact the surface 8 of the container body 2 to cover the container body 2.

FIG. 16 shows still another embodiment. FIG. 17 shows a partially enlarged view of a cross section taken along the line EE of FIG. In this embodiment, the heat-resistant adhesive 38 is applied to the surface 8 of the container 2, and short fibers 37 made of heat-resistant fibers are planted to form the heat-insulating coating 9 through this. The short fibers 37 are flocked perpendicularly to the surface 8 by the electrostatic flocking method, and the occupancy of the area of the surface 8 by the cut surface of the short fibers 37 is adjusted to 10 to 30% so that the air content in the heat insulating coating 9 is small. Is preferably 70 to 90% in terms of the heat insulating effect. The length of the short fiber 37 is 0.3 to 2 mm, preferably 0.5 to 1.5 mm, and the material is preferably aramid fiber in view of workability and heat insulation.

FIG. 18 shows a sectional view similar to FIG. 3 of still another embodiment. A sheath 41 having a heat insulating layer 40 is separately prepared on a metal tube body 39 of a size that fits the body 2 completely, and the sheath 41 is used as a heat insulating coating 9 so that the body is detachable. It is something that is overlaid on 2.

[0018]

[Action]

 Since the downlight 1 has the heat-insulating coating 9 made of heat-resistant fiber on the surface 8 of the body 2 that houses the lamp 3, when the body 2 is overheated by the high heat generated by the lamp 3, the body 2 is Even if it is covered with the heat insulating material 12 installed in the ceiling, heat transfer to the heat insulating material 12 is suppressed due to the heat insulating effect of the heat insulating coating 9, and the flammable surface material 13 of the heat insulating material 12 has a thermal decomposition temperature. Can be prevented from rising.

[0019]

【effect】

 Since the present invention has the above-described configuration and operation, (1) even in the case of a downlight using a lamp that generates a large amount of heat, the surface 8 of the body 2 that has been overheated by the heat insulation coating 9 is shielded. Therefore, even if the body 2 is covered with the heat insulating material 12 installed in the ceiling, the heat transfer to the heat insulating material 12 is restrained, and the flammable surface covering material 13 is not thermally decomposed, so that a fire occurs. You can prevent the risk of. (2) A downlight that overheats must be installed separately from the heat insulating material 12 in the ceiling for construction, and if the heat insulating material 12 is mat-shaped, cut it out to a size that requires separation or blowing. For the cellulosic powder for the construction method, complicated work such as providing an enclosure apart from the body 2 by a specified dimension or more and blowing it was required. However, in the present invention, these can be omitted and the construction efficiency is high. There is an advantage to improve. (3) For downlights that need to be installed separately from the insulating material inside the ceiling and the US, the manufacturer always wrote down notes on the installation in the equipment or the instruction manual, but the manufacturer was thoroughly informed. These are no longer needed, and sales expenses can be reduced. (4) Due to the manufacturer's display error or the contractor's construction error, the heat of the downlight ignites the flammable surface material of the heat insulation material, causing a fire, resulting in damage to the building and, in some cases, human life. You can avoid the risk of serious accidents that you also lose.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

2 is a partially cutaway plan view of the embodiment of FIG. 1. FIG.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view showing a state in which the downlight of the embodiment of FIG. 1 is installed on a ceiling.

FIG. 5 is a sectional view similar to FIG. 1, showing another embodiment.

FIG. 6 is an enlarged view of a circle in FIG.

FIG. 7 is a partially cutaway front view showing still another embodiment.

FIG. 8 is an enlarged view of the inside of the circle in FIG. 7.

FIG. 9 is a partially cutaway front view showing still another embodiment.

10 is a partially enlarged view of a cross section taken along the line BB of FIG.

FIG. 11 is a development view of still another embodiment.

12 is a partially cutaway perspective view of the embodiment of FIG. 11. FIG.

13 is a partially enlarged view of a cross section taken along the line CC of FIG.

FIG. 14 is a partially cutaway front view of still another embodiment.

15 is a partially enlarged view of a cross section taken along the line DD of FIG.

FIG. 16 is a partially cutaway front view showing still another embodiment.

17 is a partially enlarged view of a cross section taken along line EE of FIG.

FIG. 18 is a sectional view showing still another embodiment.

[Explanation of symbols]

 1 Downlight 2 Body 3 Lamp 4 Shade 5 Socket 6 Lead wire 7 Edge 8 Surface 9 Insulation coating 10 Ceiling board 11 Mounting hole 12 Insulation material 13 Surface material 14 Hook 15 Head 16 Feet 17 Hole 18 hole 19 Fastener 20 Thread 21 Musi 22 Seam 23 Velcro 24 Hard part 25 Soft part 26 Hook 27 Pile 28 Mating allowance 29 Hole 30 Head 31 Cylindrical part 32 Mating surface 33 Seam 34 Pile knitted fabric 35 Pile part 36 Ground knitted part 37 Short fiber 38 Adhesion Agent 39 Tube 40 Heat insulation layer 41 Sheath

Claims (1)

[Scope of utility model registration request] 1. A downlight in which a heat-insulating coating made of heat-resistant fiber is provided on the surface of a body for housing a lamp.