JP7348749B2 - lighting equipment - Google Patents

Description

The present invention relates to a lighting device.

Generally, lighting devices are installed in tunnels through which vehicles and people pass. FIG. 7 is a cross-sectional view of a conventional lighting device (see Patent Document 1). This lighting device 300 includes a main frame 301 in the shape of a hollow rectangular tube, a pair of side frames that close the openings at both ends of the main frame 301, a cover 330 made of glass, and a fixing mechanism that fixes the cover 330 to the main frame 301. 350, a plurality of LED boards 321 fixed on the support wall 310 of the main frame 301 with a plurality of bolts N3, and a power supply unit 322 housed in the hollow part of the main frame 301.

The main frame 301 includes a support wall 310, a bottom wall 311 facing the support wall 310, and two side walls 312. Each side wall 312 has an extension extending above the support wall 310, and a cover 330 is attached between a pair of opposing extensions. Further, the main frame 301 is obtained by extrusion molding, and has a uniform cross-sectional shape in the direction of arrow Z except for bolt insertion holes formed after extrusion molding.

The fixing mechanism 350 includes a plurality of bolts N5 each passed through a plurality of insertion holes 331 formed in the cover 330, a plurality of washers 353, a plurality of spacers 351, and a plurality of buffer members 321, 322. has been done.

The spacer 351 is formed with a threaded portion 351a that is threaded into the support surface 110, and a threaded hole 351b into which the bolt N5 is threaded.

The buffer member 321 has a cylindrical shape with a flange, and the flange portion is positioned between the washer 353 and the cover 330, and the cylindrical portion is positioned within the insertion hole 331. Further, the shaft portion of the bolt N5 is passed through the insertion hole 331. Buffer member 322 is positioned between spacer 351 and cover 330.

The lighting device 300 is assembled using the following procedure. First, a plurality of LED boards 321 and a plurality of spacers 351 are fixed to the support wall 310 of the main frame 301, a buffer member 322 is attached to each spacer 351, and a power supply unit 322 is housed in the hollow part of the main frame 301. Next, side frames are fixed to the openings at both ends of the main frame 301. Subsequently, the buffer member 321 is attached to each insertion hole 331 of the cover 330, and the cover 330 is placed on the main frame 301. Then, the cover 330 is fixed to the main frame 301 by passing bolts N5 through each insertion hole 331 and screwing the bolts N5 into the spacer 351. The lighting device 300 is assembled through approximately the above steps.

Japanese Patent Application Publication No. 2018-190506

In the conventional lighting device 300 described above, the fixing mechanism 350 that fixes the cover 330 to the main frame 301 has a large number of parts and has a complicated configuration, leaving room for improvement.

An object of the present invention is to provide a lighting device that can reduce the number of parts of a fixing mechanism for fixing a cover to a main frame and simplify the configuration.

The present invention is a lighting device including a main frame, a light source housed in the main frame, a cover attached to the main frame, and a fixing mechanism that fixes the cover to the main frame, The fixing mechanism is installed in the main frame with a packing installed in an insertion hole formed in the cover, a cover fixing bolt passed through the insertion hole, and the cover fixing bolt can be screwed together. a metal fitting having a bolt hole formed therein; the packing has an annular flange portion that is in close contact with the outer surface of the cover; and a metal fitting that extends cylindrically from the inner edge of the flange portion and extends from the inner circumferential surface of the insertion hole. a cylindrical portion that is in close contact with the cylindrical portion; and a protruding portion that protrudes from the outer circumferential surface of the cylindrical portion and is positioned outside the insertion hole and in the internal space of the main frame, such that the shaft portion of the cover fixing bolt is in contact with the cylindrical portion. When the cover is turned downward in a state where the cover is passed inside and not screwed into the bolt hole, the cover fixing bolt is held in the cylindrical part by frictional force with the packing. .

According to the present invention, the number of parts of the fixing mechanism for fixing the cover to the main frame can be reduced and the configuration can be simplified.

1 is a perspective view of a lighting device according to an embodiment of the present invention. FIG. 2 is a perspective view of the lighting device of FIG. 1 with the cover and light source removed. 2 is a sectional view taken along line AA in FIG. 1. FIG. It is a figure of the bolt for cover fixation of FIG. 3, (a) is a top view, (b) is a side view. It is a figure of the packing of FIG. 3, (a) is a top view, (b) is a side view. FIG. 4 is a perspective view showing a state in which the cover fixing bolt of FIG. 3 is screwed into a bolt hole of a metal fitting. FIG. 2 is a cross-sectional view of a conventional lighting device.

A "lighting device" according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. The lighting device 1 shown in FIG. 1 illuminates the inside of a tunnel, and is also called a "tunnel light" or "tunnel lighting." Since this lighting device 1 is installed outdoors, waterproof specifications are required.

This lighting device 1 includes a main frame 2, a pair of brackets 13, a pair of side frames 3, a light source 5, a power supply unit 10, a cover 4, and a fixing mechanism for fixing the cover 4 to the main frame 2. It is equipped with a plurality of packings etc. to seal between these parts. The fixing mechanism for fixing the cover 4 to the main frame 2 includes a packing 8 attached to an insertion hole 41 formed in the cover 4, a cover fixing bolt 7 passed through the insertion hole 41, and a fixing mechanism inside the main frame 2. A plurality of metal fittings 6 attached to the.

As shown in FIGS. 2 and 3, the main frame 2 includes a bottom wall 21 in the shape of a rectangular plate, and a pair of side walls 22 erected from two long sides forming the outer edge of the bottom wall 21. Arrow Z in FIGS. 1 to 3 represents the long side direction of the bottom wall 21, arrow X represents the short side direction of the bottom wall 21, and arrow Y represents the thickness direction of the bottom wall 21. This main frame 2 is obtained by extrusion molding, which has a relatively low manufacturing cost, and has a uniform cross-sectional shape over the entire length in the direction of arrow Z (long side direction), except for the bolt insertion holes formed after extrusion molding. It has become. Further, in this example, the main frame 2 is made of an aluminum alloy.

As shown in FIG. 3, on the inner surface of each of the pair of side walls 22, there are grooves 23 for attaching the packing 12, bolt holes 24 for screwing side frame fixing bolts, and rails 25 for attaching the metal fittings 6. , is provided. These grooves 23, bolt holes 24, and rails 25 extend in the direction of arrow Z (long side direction). Furthermore, these grooves 23, bolt holes 24, and rails 25 are integrally molded together with the bottom wall 21 and the pair of side walls 22 when the main frame 2 is extruded. The groove 23 is provided at the end of the side wall 22 that is remote from the bottom wall 21 . Two bolt holes 24 are provided in each side wall 22; one is provided at the boundary between the side wall 22 and the bottom wall 21, and the other is provided near the groove 23. The rail 25 is provided at an intermediate portion between the groove 23 and the bottom wall 21 in the side wall 22.

The pair of brackets 13 are for fixing the lighting device 1 to the wall surface of the tunnel, and are fixed to the outer surface of both ends of the bottom wall 21, respectively. The lighting device 1 is fixed to the wall of the tunnel so that the cover 4 faces downward or diagonally downward.

The pair of side frames 3 are for closing the openings at both ends of the main frame 2. Each side frame 3 is fixed to the main frame 2 with four side frame fixing bolts. These four side frame fixing bolts are respectively screwed into the bolt holes 24 described above in the direction of arrow Z. Furthermore, a cable bush 14 is attached to one side frame 3, through which an electric wire (not shown) is passed. Furthermore, a packing (not shown) is attached between each side frame 3 and the main frame 2.

The light source 5 is housed between the bottom wall 21 and the cover 4, as shown in FIGS. 1 and 3. The light source 5 includes a support plate 51 facing the cover 4 and the bottom wall 21, and a plurality of LED boards 52 attached to the surface of the support plate 51 on the cover 4 side. Bolt insertion holes 53 through which the light source fixing bolts 15 are passed are formed at the four corners of the support plate 51. The light source 5 is fixed to the main frame 2 by threading each light source fixing bolt 15 passed through these bolt insertion holes 53 into a bolt hole 65 of each metal fitting 6. Further, a plurality of notches 54 are formed on the outer edge of the support plate 51 to avoid cover fixing bolts 7, which will be described later.

The power supply unit 10 supplies power to and controls the light source 5, and is housed between the light source 5 and the bottom wall 21, as shown in FIG. The power supply unit 10 and the plurality of LED boards 52 are connected by electric wires (not shown).

The cover 4 is for closing the opening of the main frame 2, and is fixed to the main frame 2 in a direction facing the bottom wall 21. The cover 4 is made of colorless and transparent glass, and is formed into a rectangular plate shape that is substantially the same as the bottom wall 21. The cover 4 has eight insertion holes 41 through which the cover fixing bolts 7 are passed. Further, as shown in FIG. 3, a packing 8 is attached to each insertion hole 41, respectively. However, the number of insertion holes 41 is just an example, and is not limited to eight.

Further, the above-described packing 12 seals between the pair of side walls 22 and the cover 4 and between the pair of side frames 3 and the cover 4.

The packing 8 is made of an elastic material such as silicone, and as shown in FIGS. 3 and 5, it includes an annular flange portion 81 that is in close contact with the outer surface of the cover 4, and a cylindrical shape that extends from the inner edge of the flange portion 81. , a cylindrical portion 82 that is in close contact with the inner circumferential surface of the insertion hole 41 , and a protrusion portion 83 that protrudes from the outer circumferential surface of the cylindrical portion 82 and is positioned outside the insertion hole 41 and in the internal space of the main frame 2 .

The protruding portion 83 prevents the packing 8 from coming off from the insertion hole 41 by being located on the outer periphery of the insertion hole 41 on the inner surface side of the cover 4 after the packing 8 is attached to the insertion hole 41 . Furthermore, the protrusion 83 is formed into a tapered shape in consideration of ease of insertion into the insertion hole 41.

As shown in FIGS. 3 and 4, the cover fixing bolt 7 has a hexagonal column-shaped head 71, a circular plate-shaped holding part 72 connected to one end surface of the head 71, and a head 71 on the holding part 72. A shaft portion 73 protrudes from the opposite surface.

The holding portion 72 is formed to be one size larger than the head portion 71 . The holding part 72 sandwiches the flange part 81 between it and the outer surface of the cover 4. Thereby, the space between the insertion hole 41 and the cover fixing bolt 7 is kept watertight. In addition, if the cover fixing bolt 7 does not include the holding part 72, the plurality of corners of the hexagonal columnar head 71 may hit the flange part 81 and damage the flange part 81. In order to prevent damage to the flange portion 81, it is necessary to interpose a washer between the head 71 and the flange portion 81, but this would lead to an increase in the number of parts, so in this example, the holding portion 72, which plays the role of a washer, is An integrated cover fixing bolt 7 is used. Note that the head 71 may have a round shape, and in that case, the holding portion 72 can be omitted.

The shaft portion 73 has a stepped shape including a cylindrical large diameter portion 73a located near the head 71 and a cylindrical small diameter portion 73b having a smaller diameter than the large diameter portion 73a. A male thread is cut on the outer peripheral surface of the small diameter portion 73b, but no male thread is cut on the outer peripheral surface of the large diameter portion 73a. As shown in FIG. 3, when the cover 4 is fixed to the main frame 2, the large diameter part 73a is located inside the cylindrical part 82 of the packing 8, and the small diameter part 73b is screwed into the bolt hole 65 of the metal fitting 6. It matches.

Further, the outer diameter of the large diameter portion 73a is set to be slightly larger than the inner diameter of the cylindrical portion 82. Therefore, when the cover 4 is turned downward with the large diameter part 73a of one cover fixing bolt 7 passed through the inside of the cylindrical part 82 and the small diameter part 73b not screwed into the bolt hole 65 (other The cover fixing bolt 7 is screwed into the bolt hole 65 so that the cover 4 itself does not fall.) The cover fixing bolt 7 is held in the cylindrical portion 82 by the frictional force with the packing 8.

As described above, the lighting device 1 is installed on the wall of the tunnel so that the cover 4 faces downward or diagonally downward. In this lighting device 1, there is an opportunity to loosen the cover fixing bolts 7 and remove the cover 4 during maintenance or the like. In this case, conventionally, every time one bolt was loosened, the bolt, washer, packing, etc. were collected to prevent these parts from falling, but in this example, even if the cover fixing bolt 7 is loosened, the bolt, washer, packing, etc. Since the cover fixing bolts 7 are held by the packing 8 without falling, and the packing 8 also remains attached to the insertion hole 41, the work efficiency when removing the cover 4 can be greatly improved. .

The metal fitting 6 is obtained by press working or the like on a metal plate, and is formed by bending a first plate part 61 and one end of the first plate part 61, as shown in FIGS. 3 and 6. A second plate portion 62 is provided. The first plate portion 61 is positioned within the rail 25 . The second plate portion 62 is positioned outside the rail 25 and parallel to the bottom wall 21 . A bolt hole 64 into which the fitting fixing bolt 11 is screwed is formed in the first plate portion 61 . Two bolt holes 65 are formed in the second plate portion 62 . These two bolt holes 65 have the same diameter, and both the cover fixing bolt 7 and the light source fixing bolt 15 can be screwed into them. The metal fitting 6 is slidable over the entire length of the rail 25, and is non-slidably fixed at a position corresponding to the insertion hole 41 by a metal fitting fixing bolt 11.

Further, in this example, as shown in FIG. 2, four metal fittings 6 are attached to each rail 25, and the cover 4 is fixed using a total of eight metal fittings 6. The light source 5 is fixed using four of these eight metal fittings 6. That is, the metal fittings 6 at the four corners of the main frame 2 are used for both fixing the cover 4 and fixing the light source 5, and the four metal fittings 6 at the center of the main frame 2 are used only for fixing the cover 4. ing.

Further, the inner diameter of the bolt hole 65 of the metal fitting 6 is set smaller than the outer diameter of the large diameter portion 73a of the cover fixing bolt 7. Further, the position where the stepped portion at the boundary between the large diameter portion 73a and the small diameter portion 73b abuts against the second plate portion 62, as shown in FIG. 3, is the normal assembly position of the cover fixing bolt 7. Therefore, when assembling the lighting device 1, the cover fixing bolt 7 can be positioned at the normal assembly position by tightening the cover fixing bolt 7 until it stops rotating. Further, even if a further rotational force is applied with the cover fixing bolt 7 in the normal assembly position, the large diameter portion 73a cannot pass through the bolt hole 65, so the cover fixing bolt 7 becomes too tight. This will be prevented.

As explained above, in the lighting device 1, the fixing mechanism for fixing the cover 4 to the main frame 2 is composed of eight packings 8, eight cover fixing bolts 7, and eight metal fittings 6. , the number of parts is reduced compared to the conventional product (see FIG. 7), and the configuration is significantly simplified.

Furthermore, in the above-described embodiments, a tunnel light was used as an example of the lighting device, but the lighting device of the present invention is not limited to tunnel lights, but can be applied to various lighting devices such as street lights and security lights. can.

Note that the embodiments described above merely show typical forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the gist of the invention.

1 Lighting device 2 Main frame 4 Cover 5 Light source 6 Metal fittings 7 Cover fixing bolt 8 Packing

Claims (3)

main frame and
a light source housed within the main frame;
a cover attached to the main frame;
A lighting device comprising: a fixing mechanism for fixing the cover to the main frame,
The fixing mechanism is
a packing installed in an insertion hole formed in the cover;
a cover fixing bolt passed through the insertion hole;
a metal fitting installed in the main frame and having a bolt hole into which the cover fixing bolt can be screwed ;
The packing includes an annular flange portion that tightly contacts the outer surface of the cover, a cylindrical portion that extends in a cylindrical shape from the inner edge of the flange portion and that contacts the inner peripheral surface of the insertion hole, and an outer peripheral surface of the cylindrical portion. a protrusion protruding from the insertion hole and positioned outside the insertion hole and in the internal space of the main frame;
When the cover is turned downward with the shaft portion of the cover fixing bolt passed through the inside of the cylindrical portion and not screwed into the bolt hole, the cover fixing bolt is subjected to frictional force with the packing. is held within the cylindrical part by
A lighting device characterized by: The lighting device according to claim 1 , wherein the cover fixing bolt includes a circular plate-shaped pressing portion that sandwiches the flange portion between the cover fixing bolt and the outer surface of the cover. The shaft portion of the cover fixing bolt has a stepped shape consisting of a large diameter portion near the head and a small diameter portion smaller than the large diameter portion,
The lighting device according to claim 1 or 2, wherein an inner diameter of the bolt hole is smaller than an outer diameter of the large diameter portion.

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