Elevator car lighting system

Abstract

The present invention provides an elevator car lighting device that is less likely to cause gaps at the joints between frames and can reduce light leakage. [Solution] The elevator car lighting device 10 of the present invention comprises a light source 14 arranged on a car ceiling 60, a light-transmitting plate 13 arranged below the light source, and a rectangular frame attached to the car ceiling around the outer periphery of the light source and holding the light-transmitting plate, the frame including a rectangular inner frame 40 having a pair of first frames 45 and second frames 46 having striking plates 43 attached parallel to the car ceiling with a gap between them, and an outer cover 50 comprising a first cover 54 covering the first frame from the outside and a second cover 55 covering the second frame from the outside, the first cover being screwed 451 to the inner plate of the first frame, the first frame having an attachment plate 455 on the edge of the inner plate, and the second cover being screwed 456 to the attachment plate.

Description

[Technical field]

[0001] The present invention relates to a lighting device to be attached to the ceiling of an elevator car, and more particularly to a structure for improving light leakage from the frame of the lighting device. [Background technology]

[0002] The ceiling of an elevator car (car ceiling) is fitted with lighting devices that have light sources such as LEDs. The wiring for the light source's power supply and controls is located above the car since it is connected to the outside of the car, but it is desirable to be able to carry out regular maintenance work such as replacing and cleaning LEDs from inside the car.

[0003] Some lighting devices for car ceilings are configured to cover the light source from below with a light-transmitting plate that transmits light so that the light source is not directly exposed. For example, in Patent Document 1, the light-transmitting plate is attached by arranging four frames with a U-shaped cross section in a rectangular shape. Specifically, the upper piece of the U-shaped frame is attached to the ceiling so that it is concave inward, and the light-transmitting plate is placed and held on the lower piece. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-67449 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, if there is a bending error in the frame, the cross section of the U-shape may open up, creating a gap where the frames meet, causing light leakage and detracting from the aesthetic and design qualities.

[0006] An object of the present invention is to provide an elevator car lighting device that is less likely to cause gaps at the joints between frames and can reduce light leakage. [Means for solving the problem]

[0007] The elevator car lighting device of the present invention comprises: A light source disposed on the ceiling of the cage; a light-transmitting plate having light transmittance and arranged below the light source; A rectangular frame that is attached to the car ceiling around the outer periphery of the light source and holds the light-transmitting plate; An elevator car lighting device comprising: The frame is a rectangular inner frame including a pair of first frames each having an inner plate extending downward and attached to the car ceiling in parallel with a gap therebetween, and a second frame each having an inner plate extending downward and disposed between opposing ends of the first frames and adjacent to the first frames with a corner therebetween; An outer cover including a first cover that covers the first frame from the outside and a second cover that covers the second frame from the outside, the first cover and the second cover having an outer plate extending downward and covering the inner plate from the outside and a holding plate that is bent inward from a lower edge of the outer plate and holds the light-transmitting plate from the underside; Contains the first cover is screwed to the inner plate of the first frame, The first frame has a mounting plate provided on an edge of the inner plate, and the second cover is fixed to the mounting plate with screws.

[0008] The inner plate and the mounting plate may be configured to have blind nuts attached thereto for screwing the first cover and the second cover.

[0009] The mounting plate may include an angle protruding from a fixed plate in a direction perpendicular to the fixed plate, and the fixed plate of the angle may be fixed to the first frame.

[0010] The first frame and the second frame each have a pressing plate bent inwardly from a lower end of the inner plate, The light-transmitting plate may be configured to be sandwiched and held between the holding plate and the pressing plate. Effect of the Invention

[0011] In the elevator car lighting device of the present invention, the first cover and second cover constituting the outer cover are attached to one of the first frames, rather than to the first frame and second frame constituting the inner frame, respectively. Therefore, even if there is a bending error or the like in the first frame and second frame adjacent to each other across a corner, a gap is unlikely to occur where the first cover and second cover butt together, and light leakage can be reduced.

[0012] Furthermore, even if there is a bending error in the first frame or the second frame, the bending error can be corrected when aligning or attaching the frames, or by screwing the first cover and the second cover to the frames, respectively, or by adjusting the tightening strength of the screws. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a top view of an elevator car lighting device according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a right side view of the lighting device. [Diagram 3] FIG. 3 is a cross-sectional view taken along lines AA and BB in FIG. [Figure 4] FIG. 4 is a bottom view, a side view, and a front view showing the edge of the first frame. [Diagram 5] FIG. 5 is a bottom view, a side view, and a front view showing the edge of the second frame. [Figure 6] FIG. 6 is a bottom view of the inner frame of the circled portion C in FIG. [Figure 7] FIG. 7A is an oblique projection view of the first cover, and FIG. 7B is an oblique projection view of the second cover. [Figure 8] FIG. 8 is a bottom view showing a process of attaching the first cover (second cover) to the first frame (second frame). [Figure 9]FIG. 9 is a cross-sectional view showing a process of attaching the first cover (second cover) to the first frame (second frame). [Figure 10] 10A is a bottom view showing a state in which the first cover and the second cover are attached to the circled portion C in FIG. 1, and FIG. 10B is a side view of FIG. 10A as viewed from the direction of the arrow E. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] An elevator car lighting device 10 of the present invention will now be described with reference to the drawings.

[0015] 1 is a top view of an elevator car lighting device 10 according to one embodiment of the present invention. The lighting device 10 is installed on a car ceiling 60. The lighting device 10 can be, for example, in a rectangular or substantially square shape that is one size smaller than the car ceiling 60, and is attached to the car ceiling 60 from inside the car.

[0016] The illustrated lighting device 10 has a configuration in which a rectangular panel 11 made of a metal plate as shown in Fig. 1 is arranged inside a rectangular frame (an outer cover 50 described later) shown in Fig. 1 and Fig. 2. Four embedded LEDs are arranged as downlights 12 in the panel 11 to illuminate the inside of the car. There is a gap between the panel 11 and the outer cover 50, and a light-transmitting plate 13 is arranged between the panel 11 and the outer cover 50.

[0017] The light-transmitting plate 13 is located below the light source 14 (see FIG. 3) arranged in the lighting device 10, and transmits light from the light source 14 to illuminate the inside of the car. The light-transmitting plate 13 can be made of a light-transmitting resin material. In this embodiment, the light-transmitting plate 13 is formed long and thin, and goes around the outer periphery of the panel 11. By adopting a diffusion plate having light diffusing properties as the light-transmitting plate 13, it is possible to illuminate the inside of the car in an indirect manner.

[0018] The lighting device 10 is attached to the car ceiling 60 by a plurality of brackets, frames, etc. Fig. 3 is a cross-sectional view taken along lines AA and BB in Fig. 1. In Fig. 3, the left side of the paper is referred to as the inside, and the right side of the paper is referred to as the outside.

[0019] Reference numeral 20 denotes a main bracket that holds the panel 11 and also holds the light-transmitting plate 13. The main bracket 20 is a member having a U-shaped cross section, with a lower piece 22 formed longer than an upper piece 21. The upper piece 21 of the main bracket 20 is screwed 23 to the car ceiling so as to be outwardly concave, and the panel 11 is attached to the lower surface of the lower piece 22 by welding or adhesive. Furthermore, leaf springs 24 are attached to the upper surface of the lower piece 22 at equal intervals facing outward, approximately in the center, and the light-transmitting plate 13 placed on the upper surface of the lower piece 22 is pressed against the lower piece 22 from above by the leaf springs 24 and clamped.

[0020] Reference numeral 30 denotes a light source support bracket that supports the light source 14. The light source support bracket 30 is an L-shaped member with the inside bent downward, and the light sources 14 are attached to the underside of an upper piece 31 and the outer surface of a vertical piece 32. The light source 14 can be, for example, an LED tape light. The light source support bracket 30 is attached by fastening the upper piece 31 to the car ceiling 60 with screws 33.

[0021] 3, a bracket consisting of an inner frame 40 and an outer cover 50 is disposed on the outer side of the light source support bracket 30. The inner frame 40 is attached to the car ceiling 60 and holds the outer cover 50. The outer cover 50 is supported by the inner frame 40 and holds one edge of the light-transmitting plate 13, the other edge of which is held by the main bracket 20 described above.

[0022] The inner frame 40 can have a U-shaped cross section as shown in Fig. 3, and an upper piece 42 is screwed 41 to the car ceiling 60 so as to be concave inward. More specifically, as shown in Fig. 4 and Fig. 5, the inner frame 40 is made of frames 45, 46 in which an inner plate 43 extends downward from the upper piece 42 and has a pressing plate 44 bent inward from the lower end of the inner plate 43. The frames 45, 46 are made into a U-shape by bending, for example, a galvanized steel sheet.

[0023] In this embodiment, the frames 45, 46 are composed of two types of members. In Fig. 1, the frame in the short direction of the lighting device 10 is called the first frame 45, and the frame in the long direction is called the second frame 46. Fig. 6 is an enlarged view of the first frame 45 and the second frame 46 included in the circled area C in Fig. 1. In this embodiment, as shown in the figure, the second frames 46, 46 are disposed between the ends of a pair of parallel first frames 45, 45.

[0024] 4, at the end of the first frame 45, a screw hole 451 is formed in the inner plate 43. This screw hole 451 is a hole for screwing 543 the first cover 54 of the outer cover 50 (see FIGS. 1 and 2).

[0025] An angle 453 having screw holes 456 formed therein for screwing 553 (see Figs. 1 and 2) the second cover 55 of the outer cover 50 is attached to the inner plate 43 of the first frame 45. The angle 453 is L-shaped, and an attachment plate 455 is provided in a direction perpendicular to a fixing plate 454 fixed to the inner plate 43. The angle 453 can be attached by arranging the attachment plate 455 parallel to, and preferably flush with, the edge of the inner plate 43, and bonding or welding the fixing plate 454 to the inner plate 43.

[0026] These screw holes 451, 456 can be directly drilled into the inner plate 43 and the mounting plate 455, but in order to ensure the tap depth, it is preferable to use blind nuts 452, 457 (for example, Ebinuts (registered trademark)).

[0027] In the present invention, the outer cover 50 is positioned and fixed to the inner frame 40 by fastening the first cover 54 and the second cover 55 with screws 543, 553, respectively, into two screw holes 451, 456 provided at the end of the first frame 45. Details of the first cover 54 and the second cover 55 will be described later, but whether the first cover 54 and the second cover 55 can be butted together without any gap depends on the positions and angles of the screw holes 451, 456 of the first frame 45. In particular, the mounting angle and position of the angle 453. For this reason, it is desirable to ensure precision by previously mounting the angle 453 at the factory.

[0028] 3, the first frame 45 has screw holes 458 formed at equal intervals in the length direction for screwing 57 the first cover 54. The screw holes 458 can employ, for example, blind nuts.

[0029] 5, the second frame 46 paired with the first frame 45 is a U-shaped member including an upper piece 42, an inner plate 43, and a pressing plate 44, like the first frame 45, but the shape of the end is different from that of the first frame 45. In the second frame 46, the inner plate 43 is formed longer than the upper piece 42 and pressing plate 44 by the length of the upper piece 42 and pressing plate 44 of the first frame 45. This is because, when the corners of the first frame 45 and the second frame 46 are butted together as shown in FIG. 6, the inner plate 43 of the second frame 46 covers the end edge of the first frame 45.

[0030] Furthermore, the inner plate 43 of the second frame 46 has through holes 461 formed at its end side, which serve as through holes for screws when fastening 57 at positions facing the screw holes 456 (457) of the first frame 45 (mounting plate 455) as shown in Fig. 6 when the inner plate 43 is butted against the first frame 45. Furthermore, the inner plate 43 of the second frame 46 has screw holes 462 formed at equal intervals in the length direction at positions other than the end, for fastening 57 (see Fig. 3) the second cover 55 with screws. For the screw holes 462, for example, blind nuts can be used.

[0031] As shown in Fig. 6, the first frames 45, 45 and the second frames 46, 46 are arranged on the car ceiling 60 so that the ends of the inner plates 43 of the second frames 46 face the edges of the first frames 45. They are then screwed to the car ceiling 60 with screws 41 (see Fig. 3 and Fig. 8 described later) to form a square-shaped inner frame 40. Even if the second frame 46 has a bending error or the like, the bending error or the like of the second frame 46 can be corrected by covering the edge of the first frame 45 with the inner plate 43 of the second frame 46, aligning it, and screwing it in with the screws 41.

[0032] The outer cover 50 is composed of a first cover 54 that covers the first frame 45, and a second cover 55 that covers the second frame 46. As shown in Figures 3 and 7, the first frame 45 and the second frame 46 have an outer plate 51 that extends in the vertical direction and a holding plate 52 that is bent inwardly from the lower edge of the outer plate 51. The outer cover 50 can be produced, for example, by bending a decorative steel plate or a painted steel plate.

[0033] 3, the outer plate 51 of the outer cover 50 covers the inner plate 43 of the inner frame 40 from the outside, and the holding plate 52 plays a role of holding the light-transmitting plate 13. Note that it is preferable that the holding plate 52 has a cushioning material 53 (see FIG. 7) disposed on the upper surface thereof in order to support the light-transmitting plate 13 without any gaps and to prevent the plate from being scratched.

[0034] The first cover 54 and the second cover 55 have different end shapes. Specifically, as shown in Fig. 7(a), at the end of the first cover 54, the outer plate 51 extends longer than the holding plate 52 by the width of the holding plate 52 of the second cover 55. On the other hand, as shown in Fig. 7(b), in the second cover 55, the outer plate 51 and the holding plate 52 have the same length.

[0035] The inner frame 40 is formed so that the second frame 46 is positioned between the first frames 45 as shown in Fig. 6, but the outer cover 50 is formed to a length such that the first covers 54, 54 are positioned between the second covers 55, 55 as shown in Fig. 5. This is because the first frame 45 is formed with screw holes 451, 456 for screwing the first cover 54 and the second cover 55 together as shown in Fig. 5.

[0036] The first cover 54 and the second cover 55 are formed with through holes 541, 551 near the ends as through holes for screw fastening. The positions of the through holes 541, 551 are aligned with the screw holes 451 and 456 (overlapping with the through hole 461 as a through hole) when the covers 54, 55 are placed on the frames 45, 46 and fastened with screws 543, 553 as shown in FIG. 5. The first cover 54 and the second cover 55 are also formed with through holes 58 as through holes at positions facing the screw holes 458 formed in the frames 45, 46. The through holes 58 are preferably elongated as shown in FIG. 2 so that the screws 57 can be fastened after the frames 45, 46 are positioned at the ends.

[0037] The lighting device 10 is assembled using the above-mentioned components. Fig. 9 is a cross-sectional view of the lighting device 10 before the outer cover 50 is attached. As shown in the figure, the main bracket 20 with the panel 11 attached, the light source support bracket 30 with the light source 14 arranged thereon, and the first frame 45 and the second frame 46 that form the inner frame 40 are previously fastened to the car ceiling 60 with screws 23, 33, 41. Then, the light-transmitting plate 13 is sandwiched and held between the light source support bracket 30 and the leaf spring 24.

[0038] In this state, as shown by arrow D in Figures 8 and 9, the first cover 54 is brought close to the outside of the first frame 45, and the second cover 55 is brought close to the outside of the second frame 46, to be positioned. Specifically, the first cover 54 is disposed so that the through hole 541 faces the screw hole 451 of the first frame 45. The second cover 55 is positioned so that the through hole 551 of the second cover 55 faces the screw hole 456 of the mounting plate 455 of the first frame 45, which is located at a position overlapping with the through hole 461 of the second frame 46. As a result, the light-transmitting plate 13 is sandwiched and held between the cushion material 53 of the holding plate 52 and the pressing plate 44.

[0039] Next, screws 542, 552 are inserted into screw hole 451 and through hole 541, and screw hole 456 and through hole 551 to fasten screws 543, 553. This fastening work may be performed in a high place where there is a small gap between the car wall and the lighting device 10. Therefore, it is preferable that the screws 542, 552 be hand-tightened screws as shown in FIG.

[0040] When the screws 543, 553 are completed, the first cover 54 and the second cover 55 are attached to the first frame 45 with almost no gap at the butt joint 56, as shown in Fig. 10. Fig. 10(a) is a bottom view of the attached state of the first cover 54 and the second cover 55, and Fig. 10(b) is a side view in the direction of the arrow E in (a). Referring to the figure, it can be seen that the butt joint 56 is in contact with each other with no gap.

[0041] Then, the remaining screw holes 458 in the first frame 45 and the second frame 46 and the remaining through holes 58 in the first cover 54 and the second cover 55 are similarly screwed in place 57, thereby completing the installation of the lighting device 10 as shown in FIG. 1.

[0042] In this embodiment, both ends of the first cover 54 and the second cover 55 constituting the outer cover 50 are screwed 543, 553 to the first frame 45. One of the screw holes 451, 456 of the first frame 45 is formed in the inner plate 43, and the other is formed in the angle 453. These can be formed with high precision in advance in a factory, so that the relative positional deviation of the screw holes 451, 456 adjacent to each other across the corner can be reduced. Therefore, when the first cover 54 and the second cover 55 are screwed 543, 553, the gap at the butt portion 56 can be reduced.

[0043] Also, there may be bending errors in the first frame 45 and the second frame 46, or the U-shaped cross-sections of these frames 45, 46 may be open. Even in this case, the bending errors of the frames 45, 46 can be corrected by fastening the covers 54, 55 with screws 543, 553, or by adjusting the tightening strength of the screws 542, 552. As a result, the gap between the frames 45, 46 and the gap at the butt joint 56 between the covers 54, 55 (see FIG. 10) can be reduced.

[0044] In the lighting device 10 of the present invention, gaps are unlikely to occur at the butt joint 56 of the outer cover 50, so that light leakage from the light source 14 through the butt joint 56 can be reduced when the lighting is turned on.

[0045] In this embodiment, the outer cover 50 configured in a square shape is made up of four covers 54, 55, which are respectively screwed to the inner frame 40 by screws 543, 553, 57. Therefore, since the covers 54, 55 can be removed one by one, it is sufficient to remove only the necessary covers 54, 55 during normal maintenance work such as cleaning or replacing the light source 14, and deformation and damage can be suppressed compared to a structure in which the covers are connected together in a square shape, and handling is also easy.

[0046] The above description is for the purpose of explaining the present invention, and should not be interpreted as limiting the invention described in the claims or restricting the scope of the invention. Furthermore, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications are possible within the technical scope described in the claims. [Explanation of symbols]

[0047] 10. Lighting Equipment Panel 11 13 Translucent plate 14 Light source 40 Inner Frame 45 1st Frame 451,456 Screw holes 452,457 Blind nuts 453 Angle 455 Mounting plate 46 2nd Frame 50 Outer cover 54 First Cover 542,553 Screws 543,553 Screw fastening 55 Second Cover 56 Butt joint

Claims

1. A light source disposed on the ceiling of the cage; a light-transmitting plate having light transmittance and arranged below the light source; A rectangular frame that is attached to the car ceiling around the outer periphery of the light source and holds the light-transmitting plate; An elevator car lighting device comprising: The frame is a pair of first frames each having an inner plate extending downward and attached to the car ceiling in parallel with a gap therebetween; and a second frame each having an inner plate extending downward and disposed between opposing ends of the first frames, forming a rectangular inner frame in which the first frames and the second frames are adjacent to each other across a corner formed when the first frames and the second frames are assembled; An outer cover including a first cover that covers the first frame from the outside and a second cover that covers the second frame from the outside, the first cover and the second cover having an outer plate extending downward and covering the inner plate from the outside and a holding plate that is bent inward from a lower edge of the outer plate and holds the light-transmitting plate from the underside; Contains the first cover is screwed to the inner plate of the first frame, The first frame has a mounting plate provided on an edge of the inner plate, and the second cover is fixed to the mounting plate by screws. Elevator car lighting system.

2. The inner plate and the mounting plate are fitted with blind nuts for screwing the first cover and the second cover together.

2. An elevator car lighting system as claimed in claim 1.

3. The mounting plate is provided with an angle protruding from a fixed plate in a direction perpendicular to the fixed plate, and the fixed plate of the angle is fixed to the first frame.

3. An elevator car lighting system as claimed in claim 2.

4. The first frame and the second frame each have a pressing plate bent inwardly from a lower end of the inner plate, The light-transmitting plate is sandwiched and held between the holding plate and the pressing plate.

4. An elevator car lighting system according to claim 3.

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