Lighting device

Abstract

To provide an illuminating device that can improve designability, can reduce machining work, and can improve construction workability.SOLUTION: An illuminating device 1A or 1B comprises a light emitting device 10, a holding member 20, and a supporting column having a hollow cylindrical shape. The holding member 20 comprises a first column contact part, a second column contact part whose plane size is smaller than that of the first column contact part, and a column attachment part whose plane size is smaller than that of the second column contact part. The supporting column is selected from a first supporting column 30, and a second supporting column 40 whose plane size is smaller than that of the first supporting column. When the supporting column is the first supporting column 30, the second column contact part and the column attachment part are arranged in the first supporting column 30, the first supporting column 30 is attached to the column attachment part, and an upper end surface of the first supporting column 30 is brought into contact with a lower surface of the first column contact part. When the supporting column is the second supporting column 40, the column attachment part is arranged in the second supporting column 40, the second supporting column 40 is attached to the column attachment part, and an upper end surface of the second supporting column 40 is brought into contact with a lower surface of the second column contact part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a lighting device, and particularly to a lighting device suitable for an outer structure.

Background Art

[0002] Conventionally, a lighting fixture is known that includes a spherical glass globe and a holder for fixing the globe, and the tip of a pole standing upright from the ground is inserted into the holder (for example, Patent Document 1). The lighting fixture described in Patent Document 1 includes a holder having a mounting portion for a large pole and a mounting portion for a small pole. Therefore, the lighting fixture described in Patent Document 1 can be attached to poles with two types of outer diameters, a pole with a large outer diameter and a pole with a small outer diameter.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the lighting fixture described in Patent Document 1, a cylindrical hole for inserting a large pole as a mounting portion for a large pole is formed in the lower end surface of the holder, and inside the mounting portion for a large pole, a pair of protruding portions protruding toward the globe side as a mounting portion for a small pole are formed. Since a common holder provided with a groove portion for inserting the small pole of this protruding portion is used, when the small pole is attached, the mounting portion for the large pole is exposed, and there is a problem that the design property deteriorates. In addition, the large pole and the small pole need to be screwed to the holder before attaching the globe, and there is also a problem that the workability of installing the lighting device deteriorates. Furthermore, since the screw holes for attaching the small poles are formed in the small pole mounting section and the screw holes for attaching the large poles are formed in the large pole mounting section, the screw hole processing work becomes complicated, and the screw fastening positions are also different, which reduces the efficiency of the installation process.

[0005] The object of the present invention is to provide a lighting device that can improve design aesthetics, reduce processing work, and improve installation efficiency. [Means for solving the problem]

[0006] The present invention provides a lighting device, a holding member for holding the lighting device, and a hollow cylindrical support column attached to the holding member, wherein the holding member comprises a first column contact portion, a second column contact portion formed continuously with the lower surface of the first column contact portion and having a smaller planar size than the first column contact portion, and a column mounting portion formed continuously with the lower surface of the second column contact portion and having a smaller planar size than the second column contact portion, and the support column comprises a first support column and a second support column having a smaller planar size than the first support column The support column is selected from a column and a support column, and if the support column is a first support column, the second column contact portion and the column mounting portion are located inside the first support column, the first support column is attached to the column mounting portion, and the upper end surface of the first support column is in contact with the lower surface of the first column contact portion. If the support column is a second support column, the column mounting portion is located inside the second support column, the second support column is attached to the column mounting portion, and the upper end surface of the second support column is in contact with the lower surface of the second column contact portion. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a lighting device that can improve design aesthetics, reduce processing work, and improve installation workability. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing the lighting device of the embodiment, where (A) is a perspective view showing the first lighting device using the first support column, and (B) is a perspective view showing the second lighting device using the second support column. [Figure 2] This is an exploded perspective view showing the main components of the first lighting device. [Figure 3] This is an exploded perspective view showing the main components of the first lighting device. [Figure 4] This is a cross-sectional view showing the main part of the first lighting device. [Figure 5] This is a perspective view showing the main components of the first lighting device. [Figure 6] This is an exploded perspective view showing the main components of the second lighting device. [Figure 7] This is an exploded perspective view showing the main components of the second lighting device. [Figure 8] This is a cross-sectional view showing the main part of the second lighting device. [Figure 9] This is a perspective view showing the main components of the first lighting device. [Modes for carrying out the invention]

[0009] Hereinafter, an embodiment of the present invention, the lighting device 1, will be described based on the drawings. As shown in Figure 1, the lighting device 1 comprises a light-emitting device 10, a holding member 20 for holding the light-emitting device 10, and a first support column 30 or a second support column 40 that can be selectively attached to the holding member 20. Specifically, the first support column 30 is a support column with a larger height dimension and planar size compared to the second support column 40. By using the first support column 30, a first lighting device 1A with a larger height dimension, as shown in Figure 1(A), can be constructed, and by using the second support column 40, a second lighting device 1B with a smaller height dimension, as shown in Figure 1(B), can be constructed. Furthermore, the light-emitting device 10 and the holding member 20 are the same components in both the lighting device 1A and the lighting device 1B.

[0010] [First lighting device] The first lighting device 1A will be described with reference to Figures 1(A), 2 to 5. The light-emitting device 10 is a plate-type light-emitting device, and as shown in Figures 2 and 3, it comprises a translucent plate 11 and a light-emitting unit 15 that irradiates light into the plate 11. In Figures 1 to 3, the direction along the long side of the plate 11 is the X-axis direction, the direction along the short side of the plate 11 is the Y-axis direction, and the height direction perpendicular to the X-axis and Y-axis directions, that is, the longitudinal direction of the first support column 30, is the Z-axis direction. Furthermore, in the Z-axis direction, the plate 11 side is defined as upward, and the anchors 36 and 46, which will be described later, are defined as downward.

[0011] Plate 11 is made of a light-transmitting material such as acrylic or glass, which is less prone to deterioration even when placed outdoors, so that it can transmit light incident from the light-emitting part 15. Plate 11 has a light-diffusing function that diffuses and transmits incident light, and is configured to diffuse and radiate light incident from the light-emitting part 15 to the outside. Plate 11 is a rectangular plate-like member formed in a plan view from the Z-axis direction along the longitudinal direction of the first support column 30. A through hole 12 is formed in one of the four corners of plate 11, penetrating through the plate in the thickness direction (Z-axis direction). A groove 13, which is continuous in the Z-axis direction, is formed on the outer circumferential surface of the corner portion of the plate 11 where the through hole 12 is formed. In addition, grooves 13 similar to the groove 13 are formed on the long side and the short side of the plate 11.

[0012] The light-emitting section 15 comprises a light source unit such as an LED, a power supply unit for driving the light source unit, and a light-emitting section cover that houses these units. In this embodiment, an LED is used as the light source, and the power supply unit is configured to include a circuit that converts alternating current to direct current. The internal wiring of the drive unit is electrically connected to the power supply cable 16. For this reason, the cable 16 extends from the light-emitting section 15. The end of the cable 16 is provided with a connector for connecting to other cables and a plug for plugging into an outlet, although these are not shown in the figure. The light-emitting part 15 is arranged in the through-hole 12 of the plate 11 and irradiates light radially from the LED toward the inner peripheral surface of the through-hole 12. The light irradiated into the plate 11 from the light-emitting part 15 is diffused in the plate 11 and radiated to the outside.

[0013] The holding member 20 includes a front surface cover 21 and a back surface cover 25. The front surface cover 21 is made of aluminum die-cast and includes a surface portion 211 formed in a rectangular shape in a plan view and two side surface portions 212 arranged orthogonally along the long side and the short side of the plate 11. A recess for housing the upper part of the light-emitting part 15 is formed on the back surface of the surface portion 211. Bulging portions 213 respectively arranged in the respective concave grooves 13 of the plate 11 are formed on the side surface portions 212. Thread holes are formed in each of the bulging portions 213 along the Z-axis direction. A surface resin material 22 is arranged on the back surface of the surface portion 211 so that the front surface cover 21 does not directly contact the front surface 11A of the plate 11.

[0014] The back surface cover 25 is also made of aluminum die-cast, and includes a first pillar contact portion 251 formed in a rectangular shape in a plan view, a second pillar contact portion 252 formed in a rectangular shape in a plan view and continuous with the back surface of the first pillar contact portion 251, and a pillar mounting portion 253 formed in a rectangular shape in a plan view and continuous with the back surface of the second pillar contact portion 252. The first pillar contact portion 251 is substantially the same size as the front surface cover 21 in a plan view, the second pillar contact portion 252 is sized slightly smaller than the first pillar contact portion 251, and the pillar mounting portion 253 is sized slightly smaller than the second pillar contact portion 252. Through-holes 2511 for inserting screws are formed along the Z-axis direction at three corner portions of the first pillar contact portion 251. Also, a back surface resin material 26 is arranged on the surface of the first pillar contact portion 251 so that the back surface cover 25 does not directly contact the back surface 11B of the plate 11, similar to the surface resin material 22. As shown in FIG. 4, the column attachment portion 253 has a substantially square tube shape, and a pair of corner portions arranged on the diagonal line are formed with a thick wall and screw holes 29 are formed therein. That is, screw holes 29 used for attaching the attachment 50 to the column attachment portion 253 with screws 56 are formed on two orthogonal surfaces of the column attachment portion 253, as shown in FIG. 2. Further, the other corner portions of the column attachment portion 253 are formed as concave portions 2531 that are recessed in a substantially arc shape.

[0015] The front cover 21 and the back cover 25 are joined by abutting the first column contact portion 251 and the side surface portion 212 and screwing the screw 27 from the through hole 2511 of the first column contact portion 251 into the screw hole of the side surface portion 212. At this time, the front cover 21 abuts on the front surface 11A of the plate 11 through the front surface resin material 22, the back cover 25 abuts on the back surface 11B of the plate 11 through the back surface resin material 26, and the plate 11 is sandwiched and held from the front surface side and the back surface side. Further, since the light emitting portion 15 is disposed in the through hole 12 of the plate 11 and the side surface portion 212 is provided along the side surface of the plate 11, the plate 11 is held so as not to be movable in the X-axis direction and the Y-axis direction orthogonal to the Z-axis direction.

[0016] A storage space 254 penetrating in the Z-axis direction is formed in the back cover 25, and the lower portion of the light emitting portion 15 and the cable 16 are stored in this storage space. The light emitting portion 15 is stored in the storage space and fixed to the back cover 25 with screws 17 or the like. Further, the wiring of the light emitting portion 15 and the wiring of the cable 16 are connected using an insulated covered closed-end connector or the like. An opening is formed in the lower surface of the column attachment portion 253, and a cable connector 28 for guiding the cable 16 is fixed thereto. Therefore, the cable 16 is disposed through the through hole of the cable connector 28.

[0017] The attachment 50 is made of an aluminum extruded profile and comprises a main body 51 formed in the shape of a rectangular tube, two connecting protrusions 52 formed on two sides of the main body 51, and guide protrusions 53 formed on the other two sides. The dimension of the attachment 50 in the Z-axis direction is approximately the same as the dimension of the column mounting portion 253 in the Z-axis direction. The main body 51 is formed so that a column mounting portion 253 can be inserted into it, and in plan view, the shape and size of the main body 51 are almost identical to those of the second column contact portion 252.

[0018] The connecting projection 52 is formed on one of the four sides of the main body 51, specifically on the side that does not align with the two sides of the plate 11 where the groove 13 is formed. Furthermore, the projection dimension of the connecting projection 52 from the main body 51 is greater than the projection dimension of the guide projection 53. In other words, as shown in Figure 4 and Figure 8 described later, the planar center position of the second column contact portion 252 is eccentric to the corner side where the groove 13 of the plate 11 is formed, relative to the planar center position of the first column contact portion 251. For this reason, when the attachment 50 is placed inside the hollow portion of the first column 30, the protruding dimension of the connecting ridge portion 52 is set to be larger than that of the guide ridge portion 53 so that the planar center position of the first column 30 coincides with the planar center position of the first column contact portion 251. Each connecting projection 52 has a screw hole 54 formed therein for fixing the first support column 30. On the two sides of the main body 51 where the connecting protrusions 52 are formed, through holes 55 are formed at positions corresponding to the screw holes 29, through which screws 56 are inserted.

[0019] As shown in Figures 3 and 4, the first support column 30 is formed in a rectangular tubular shape from an aluminum extruded profile. Screw holes are formed at each of the four corners of the internal space of the first support column 30. These screw holes are used, for example, when connecting a spike or the like to the lower end of the first support column 30. The first support column 30 is formed so that an attachment 50 can be inserted into it, and in plan view, the shape and size of the first support column 30 are approximately the same as those of the first column contact portion 251. The first support column 30 has a through hole 31 (see Figure 3) through which a screw 39 is inserted, and as shown in Figure 1(A), a ventilation hole 32, a drain hole 33, and a wiring slot 34. A hole is formed above the ventilation hole 32, and a grommet 35 is fitted into this hole for inserting a cable 16 when wiring on the ground. A rod-shaped anchor 36 is inserted through the lower end of the first support column 30. The elongated wiring hole 34 and the anchor 36 portion at the lower end of the first support column 30 are buried in the ground. Therefore, when routing the cable 16 underground, the cable 16 is routed through the elongated wiring hole 34.

[0020] Next, the assembly procedure for the first lighting device 1A will be described. First, the light-emitting device 10 and the holding member 20 are assembled. Specifically, the light-emitting unit 15 and cable 16 are attached to the back cover 25, the light-emitting unit 15 is placed in the through hole 12 of the plate 11, and the back cover 25 and the front cover 21 are fixed with screws 27 to hold the plate 11. At this time, the plate 11 is held with the front resin material 22 and back resin material 26 attached to the back cover 25 and the front cover 21, respectively. Next, the attachment 50 is attached to the column mounting portion 253 by screwing a screw 56 through the through hole 55 of the attachment 50 into the screw hole 29 of the column mounting portion 253 of the back cover 25. At this time, the upper end surface of the attachment 50 abuts against the lower surface of the second column contact portion 252, and the side surface of the main body 51 of the attachment 50 and the side surface of the second column contact portion 252 are almost flush. Next, the column mounting portion 253 is inserted into the upper end opening of the first support column 30, and the screw 39 is screwed into the screw hole 54 of the attachment 50 through the through hole 31 of the first support column 30, thereby fixing the first support column 30 and the column mounting portion 253 as shown in Figure 5. At this time, the upper end surface of the first support column 30 abuts against the lower surface of the first column contact portion 251, and the side surface of the first support column 30 is positioned substantially along the side surface of the first column contact portion 251.

[0021] [Second lighting device] Next, the second lighting device 1B will be described with reference to Figure 1(B) and Figures 6 to 9. The lighting device 1B comprises a light-emitting device 10, a holding member 20, and a second support column 40. Since the light-emitting device 10 and the holding member 20 are the same as those in lighting device 1A, they are given the same reference numerals and their description is omitted.

[0022] As shown in Figures 6 to 8, the second support column 40 is formed in a rectangular tubular shape using an aluminum extruded profile. The second support column 40 is formed so that a column mounting portion 253 can be inserted into it, and in plan view, the shape and size of the second support column 40 are approximately the same as those of the second column contact portion 252. The second support column 40 has a through hole 41 (see Figure 6) through which a screw 39 is inserted, and as shown in Figure 1(B), a ventilation hole 42, a drain hole 43, and a wiring slot 44. A rod-shaped anchor 46 is inserted through the lower end of the second support column 40. The wiring slot 44 and anchor 46 portion at the lower end of the second support column 40 are buried in the ground. Therefore, the cable 16 is routed underground through the wiring slot 44.

[0023] Next, the assembly procedure for the second lighting device 1B will be described. First, the light-emitting device 10 and the holding member 20 are assembled in the same manner as with the lighting device 1A. Next, the second support column 40 is attached to the column mounting portion 253 by screwing a screw 39 into the screw hole 29 of the column mounting portion 253 of the back cover 25 through the through hole 41 of the second support column 40. At this time, the upper end surface of the second support column 40 abuts against the lower surface of the second column contact portion 252, and the side surface of the second support column 40 and the side surface of the second column contact portion 252 are substantially flush.

[0024] [Effects of the Embodiment] The first support column 30 is fixed to the column mounting portion 253 of the back cover 25 via the attachment 50, and the second support column 40 is fixed directly to the column mounting portion 253. Therefore, there is no need to machine screw holes on the side of the second column contact portion 252. As a result, compared to the case where screw holes are machined in both the column mounting portion 253 and the second column contact portion 252, the amount of machining work can be reduced and the workability of the installation can be improved. When the second support column 40 is attached to form the second lighting device 1B, the side surface of the second column contact portion 252 is exposed to the outside, but since there are no screw holes or other processing, the aesthetic design of the second lighting device 1B can be improved. When the first support column 30 is attached to form the first lighting device 1A, the upper end surface of the first support column 30 abuts against the lower surface of the first column contact portion 251, and when the second support column 40 is attached to form the second lighting device 1B, the upper end surface of the second support column 40 abuts against the lower surface of the second column contact portion 252. Thus, continuity between the back cover 25 and the first support column 30 or the second support column 40 is ensured, improving the aesthetic appearance. Since the light-emitting device 10 and the holding member 20 are common to both lighting device 1A and lighting device 1B, manufacturing costs can be reduced compared to, for example, a case where the back cover connected to the first support column 30 and the back cover connected to the second support column 40 are each made from dedicated parts.

[0025] Since the first support column 30 has a hollow interior into which the second column contact portion 252 and the column mounting portion 253 can be inserted, it can be constructed with a thick support column whose planar size is about the same as that of the first column contact portion 251. As a result, the rigidity of the first support column 30 can be improved, and a first support column 30 with a large height dimension can be used, allowing the light-emitting device 10 to be placed at a higher position. Since the second support column 40 only needs to have a hollow interior into which the column mounting portion 253 can be inserted, it can be constructed as a thin support column with a small planar size. Therefore, a slim second support column 40 can be used, improving the aesthetic appearance.

[0026] When installing the first support column 30, an attachment 50 is attached to the column mounting section 253, and the first support column 30 is then attached to this attachment 50. Therefore, for example, it is not necessary to form the first support column 30 thickly from an aluminum extruded profile and attach it directly to the column mounting section 253, which reduces the amount of material required to manufacture the first support column 30 and lowers the manufacturing cost of the first support column 30. Furthermore, if the first support column 30 is directly screwed to the side surface of the second column contact portion 252 without using the attachment 50, the size of the second column contact portion 252 in plan view must be increased to match the size of the hollow portion of the first support column 30. As a result, when the second support column 40 is attached to the column mounting portion 253, the screw holes of the second column contact portion 252 are exposed, and the side surface of the second support column 40 and the side surface of the second column contact portion 252 cannot be made flush, resulting in a step difference and a decrease in the aesthetic appeal of the lighting device 1B. In order to prevent this decrease in aesthetic appeal, it is necessary to manufacture two types of aluminum die-cast back covers 25, one for lighting device 1A and one for lighting device 1B, which increases costs. In contrast, by attaching the first support column 30 using the attachment 50, screw holes are not required in the second column contact portion 252, and the planar size of the second column contact portion 252 does not need to be matched to the hollow portion of the first support column 30. It can be set to match the planar size of the second support column 40, improving the aesthetic design of the lighting device 1B, and since only one type of back cover 25 is needed, costs can also be reduced.

[0027] Since the screw holes 29 formed in the column mounting portion 253 are used for both attaching the attachment 50 and attaching the second support column 40, the number of screw holes to be processed in the column mounting portion 253 can be minimized to just two screw holes 29, thereby reducing the amount of processing work required. The main body 51 of the rectangular tube-shaped attachment 50 has connecting protrusions 52 formed on two orthogonal sides, and the first support column 30 is attached to the attachment 50 using screw holes 54 formed in the connecting protrusions 52. As a result, the first support column 30 can be fixed using screws 39 in a position where it is in contact with the connecting protrusions 52, and the first support column 30 can be stably and accurately attached to the specified position.

[0028] Whether the attachment 50 is attached to the column mounting section 253 with screws 56, the first support column 30 is attached to the attachment 50 with screws 39, or the second support column 40 is attached to the column mounting section 253 with screws 39, the work can be performed on the same side of the attachment 50 or the column mounting section 253, thus improving the efficiency of the construction work.

[0029] According to the lighting device 1 (1A, 1B), a back cover 25 is connected to the upper ends of the first support column 30 and the second support column 40, and light from the light-emitting part 15, which is covered by this back cover 25 and the front cover 21, can be irradiated to the outside through the translucent plate 11, so that the light can be diffused and irradiated from the plate 11. For this reason, if the back surface 11B of the plate 11 is pointed downwards, it can be used as a foot light. In addition, since light can be irradiated from the front surface 11A, back surface 11B and sides of the plate 11, light can be irradiated not only below the plate 11 but also above and to the sides, so that the area around the light-emitting device 10 can be widely illuminated. Furthermore, since light is irradiated through the translucent plate 11, the shape and size of the plate 11 can be freely selected, improving the design. In addition, since the cable 16 is routed from the cable connector 28 of the back cover 25 into the first support column 30 or the second support column 40, it is possible to prevent the cable 16 from being exposed to the outside of the back cover 25, the first support column 30 or the second support column 40. As a result, it is possible to provide lighting devices 1A and 1B with a simple and aesthetically pleasing design in which only the first support column 30 or the second support column 40, the front cover 21 and the back cover 25, and the plate 11 are exposed.

[0030] Furthermore, since the plate 11 is held in place by the back cover 25 to which the light-emitting unit 15 is attached and the front cover 21, the plate-type light-emitting device 10 can be easily assembled. In addition, since the light-emitting unit 15 is covered by the front cover 21 and the back cover 25, the light-emitting unit 15 is not exposed to the outside, improving the design of the lighting device 1.

[0031] The light-emitting unit 15 is placed in a through-hole 12 formed in the corner of the plate 11, and the light from the light-emitting unit 15 is diffused within the plate 11 and emitted to the outside. Therefore, even if the size of the light-emitting unit 15 is small, light can be emitted from a wide area on the front surface 11A and back surface 11B of the plate 11. Furthermore, since the planar size of the light-emitting section 15, the first support column 30, and the second support column 40 can be made smaller than that of the plate 11, a compact and aesthetically pleasing lighting device 1 can be constructed. The light-emitting device 10 is constructed by placing a light-emitting part 15 in a through-hole 12 of a plate 11 and holding the plate 11 with a surface cover 21 and a back cover 25, which are holding members 20. Therefore, the size and shape of the plate 11 can be set as appropriate. For this reason, a lighting device 1 with excellent design can be easily constructed according to the installation location.

[0032] [Differentiation] The first support column 30 and the second support column 40 are not limited to having a rectangular cross-sectional shape; they may also be polygonal, such as triangular or hexagonal, or have a circular cross-section. Furthermore, the planar shapes of the first column contact portion 251 and the second column contact portion 252 of the back cover 25 may be formed to match the shapes of the first support column 30 and the second support column 40, or they may have different shapes. Furthermore, since the first support column 30 is attached to the attachment 50, the cross-sectional shape of the first support column 30 can be set to a different shape from that of the column mounting portion 253 by appropriately setting the shape of the attachment 50. In other words, it is sufficient that the upper end surface of the first support column 30 can contact the lower surface of the first column contact portion 251, and the difference in shape between the column mounting portion 253 and the first support column 30 can be absorbed by the attachment 50. The plates 11 of the lighting devices 1A and 1B are not limited to the structure of the embodiments described above. For example, the shape of the plate 11 is not limited to a rectangular shape in plan view, but may be a polygon such as a triangle or pentagon in plan view, or it may be a circle, ellipse, star shape, etc. In particular, the design of the lighting device can be improved by matching the cross-sectional shape of the support column with the planar shape of the plate. Furthermore, although the plate 11 had a through hole 12 in which the light-emitting part 15 was positioned, it could also be a recess instead of a through hole 12, or the light-emitting part could be positioned along the side surface of the plate 11. In this case, a through hole may be formed in the plate 11 through which a screw 27 is inserted in order to hold the plate 11 with the holding member 20.

[0033] The first support column 30 may be directly fixed to the column mounting portion 253 without using the attachment 50. That is, the second support column 40 may be brought into contact with two orthogonal sides of the column mounting portion 253 and screwed in, and similarly, the first support column 30 may be brought into contact with two orthogonal sides of the column mounting portion 253 and screwed in. The configuration of the light-emitting device 10 and the holding member 20 is not limited to the above embodiment.

[0034] [Summary of the invention] The present invention provides a lighting device, a holding member for holding the lighting device, and a hollow cylindrical support column attached to the holding member, wherein the holding member comprises a first column contact portion, a second column contact portion formed continuously with the lower surface of the first column contact portion and having a smaller planar size than the first column contact portion, and a column mounting portion formed continuously with the lower surface of the second column contact portion and having a smaller planar size than the second column contact portion, and the support column comprises a first support column and a second support column having a smaller planar size than the first support column The support column is selected from a column and a support column, and if the support column is a first support column, the second column contact portion and the column mounting portion are located inside the first support column, the first support column is attached to the column mounting portion, and the upper end surface of the first support column is in contact with the lower surface of the first column contact portion. If the support column is a second support column, the column mounting portion is located inside the second support column, the second support column is attached to the column mounting portion, and the upper end surface of the second support column is in contact with the lower surface of the second column contact portion. According to the present invention, since both the first and second support columns are fixed to the column mounting portion, there is no need to machine screw holes on the side surface of the second column contact portion. This reduces processing work and improves workability during installation. Furthermore, when the second support column is installed, the side surface of the second column contact portion is exposed to the outside, but since there are no screw holes or other processing, the aesthetic appearance is improved. Moreover, when the first support column is installed, the upper end surface of the first support column contacts the lower surface of the first column contact portion, and when the second support column is installed, the upper end surface of the second support column contacts the lower surface of the second column contact portion, thus ensuring continuity between the holding member and the support column and improving the aesthetic appearance. Since the first support column has an internal hollow section into which the second column contact section and the column mounting section can be inserted, it can be constructed with a thick support column whose planar size is approximately the same as that of the first column contact section. This improves the rigidity of the first support column, allowing the use of a first support column with a larger height dimension, and enabling the light-emitting device to be placed at a higher position. The second support column only needs to have an internal hollow section into which the column attachment part can be inserted, so it can be constructed with a thin column with a small planar size. This allows for the use of a slim column, improving the aesthetic appeal.

[0035] In the lighting device of the present invention, if the support column is a first support column, it is preferable that an attachment, which is located inside the first support column, is attached to the column mounting portion, and the first support column is fixed to the attachment with screws. According to the present invention, even if there is a gap between the column mounting portion and the first support column, the gap can be filled by providing an attachment, so that the first support column can be fixed to the column mounting portion via the attachment. For this reason, there is no need to provide a thickened portion on the first support column and fix it to the column mounting portion, and the manufacturing cost of the first support column can be reduced.

[0036] In the lighting device of the present invention, screw holes are formed on the side surface of the column mounting portion, and it is preferable that the screw holes serve as both screw holes for attaching the attachment to the column mounting portion and screw holes for attaching the second support column to the column mounting portion. According to the present invention, since the screw holes for attaching the attachment and the screw holes for attaching the second support column are used interchangeably, the number of screw holes to be machined in the column mounting section can be minimized, thereby reducing the amount of machining work required.

[0037] In the lighting device of the present invention, the first support column and the second support column are formed in a rectangular tubular shape, the attachment comprises a main body formed in a rectangular tubular shape and two connecting protrusions formed on two mutually orthogonal sides of the main body, the main body is formed so that the column mounting portion can be inserted inside, screw holes are formed in each of the connecting protrusions, and the first support column is preferably attached to the attachment by screws that are screwed into the screw holes formed in the connecting protrusions. According to the present invention, connecting protrusions are formed on two orthogonal sides of the main body of the rectangular tube-shaped attachment, and the first support column is attached to the attachment using screw holes formed in these connecting protrusions. As a result, the first support column can be screw-fixed in a position where it abuts against the connecting protrusions, and the first support column can be stably and accurately attached to the specified position.

[0038] In the lighting device of the present invention, it is preferable that screw holes are formed on the side surface of the column mounting portion, and through holes are formed on the two sides of the attachment on which the connecting protrusions are formed, at positions corresponding to the screw holes formed in the column mounting portion, and the attachment is attached to the column mounting portion by screws that are screwed into the screw holes of the column mounting portion through the through holes. According to the present invention, whether the attachment is attached to the column mounting section with screws, the first support column is attached to the attachment with screws, or the second support column is attached to the column mounting section with screws, the work can be performed on the same side of the attachment and the column mounting section, thereby improving the work efficiency during construction.

[0039] In the lighting device of the present invention, the light-emitting device is preferably configured to include a light-transmitting plate and a light-emitting unit that irradiates light into the plate, and the holding member is preferably configured to include a surface cover that covers the surface of the light-emitting unit and a back cover that covers the back surface of the light-emitting unit and has a through hole for guiding a cable extending from the light-emitting unit into the support column. According to the present invention, a back cover is connected to the upper end of a hollow cylindrical support column, and light from the light-emitting part covered by this back cover and front cover can be irradiated to the outside through a translucent plate, allowing the light to be diffused and irradiated from the plate. As a result, light can be irradiated from two opposing surfaces of the plate, and by setting the orientation of the plate, light can be irradiated downwards and upwards, or forwards and backwards, allowing for broad illumination of the base and surroundings of the lighting device. Furthermore, because light is irradiated through a translucent plate, the shape of the plate can be freely selected, improving the design. [Explanation of Symbols]

[0040] 1...Lighting device, 1A...First lighting device, 1B...Second lighting device, 10...Light-emitting device, 11...Plate, 11A...Front surface, 11B...Back surface, 12...Through hole, 15...Light-emitting part, 16...Cable, 20...Holding member, 21...Front cover, 25...Back cover, 27...Screw, 29...Screw hole, 30...First support column, 31...Through hole, 39...Screw, 40...Second support column, 41...Through hole, 50...Attachment, 51...Main body, 52...Connecting projection, 53...Guide projection, 54...Screw hole, 55...Through hole, 56...Screw, 251...First column contact part, 252...Second column contact part, 253...Column mounting part, 2511...Through hole.

Claims

1. The system comprises a light-emitting device, a holding member for holding the light-emitting device, and a hollow cylindrical support column attached to the holding member. The retaining member comprises a first column contact portion, a second column contact portion formed continuously with the lower surface of the first column contact portion and having a smaller planar size than the first column contact portion, and a column mounting portion formed continuously with the lower surface of the second column contact portion and having a smaller planar size than the second column contact portion. The support column is selected from a first support column and a second support column having a smaller planar size than the first support column. If the support column is the first support column, the second column contact portion and the column mounting portion are arranged within the first support column, the first support column is attached to the column mounting portion, and the upper end surface of the first support column abuts against the lower surface of the first column contact portion. If the aforementioned support column is a second support column, the column mounting portion is located within the second support column, the second support column is attached to the column mounting portion, and the upper end surface of the second support column is in contact with the lower surface of the second column contact portion. A lighting device characterized by the following features.

2. In the lighting device according to claim 1, If the support column is the first support column, an attachment that is placed inside the first support column is attached to the column mounting portion, and the first support column is fixed to the attachment with screws. A lighting device characterized by the following features.

3. In the lighting device according to claim 2, Screw holes are formed on the side surface of the column mounting portion. The aforementioned screw hole serves as both a screw hole into which a screw for attaching the attachment to the column mounting portion is screwed, and a screw hole into which a screw for attaching the second support column to the column mounting portion is screwed. A lighting device characterized by the following features.

4. In the lighting device according to claim 2, The first support column and the second support column are formed in a rectangular tubular shape. The aforementioned attachment is, It comprises a main body formed in the shape of a rectangular tube, and two connecting protrusions formed on two mutually perpendicular sides of the main body, The main body is formed such that the column mounting portion can be inserted into it. Each of the aforementioned connecting protrusions has a screw hole formed in it. The first support column is attached to the attachment by a screw that is screwed into a screw hole formed in the connecting projection. A lighting device characterized by the following features.

5. In the lighting device according to claim 4, Screw holes are formed on the side surface of the column mounting portion. The two sides of the attachment on which the connecting protrusions are formed have through holes at positions corresponding to the screw holes formed in the column mounting portion, and the attachment is attached to the column mounting portion by screws that are screwed into the screw holes in the column mounting portion through the through holes. A lighting device characterized by the following features.

6. In the lighting device according to claim 1, The light-emitting device comprises a translucent plate and a light-emitting unit that irradiates light into the plate. The aforementioned retaining member is A surface cover that covers the surface of the light-emitting part, The system comprises a back cover that covers the back surface of the light-emitting part and has a through hole for guiding a cable extending from the light-emitting part into the support column. A lighting device characterized by the following features.

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