Lighting fixtures

Abstract

We provide lighting fixtures that improve the ease of installation and removal. [Solution] This is a lighting fixture 10 installed on a ceiling bar 11 of a system ceiling. The lighting fixture 10 comprises a fixture body 20 positioned on the upper side of the ceiling bar 11, and a mounting member 22 positioned on the lower side of the ceiling bar 11, which is attached to the fixture body 20 with the ceiling bar 11 interposed between it and the fixture body 20.

Description

Technical Field

[0001] Embodiments of the present invention relate to lighting fixtures.

Background Art

[0002] Conventionally, in a suspended ceiling system, a ceiling bar is installed by a hanger or the like on a suspension bolt hanging down from a ceiling slab or the like of a building, and a lighting fixture is arranged between the ceiling bars facing each other in parallel.

[0003] Since this lighting fixture for a suspended ceiling system is configured to be attached to the ceiling bar on the back side above the ceiling, it takes time and effort to attach or remove the lighting fixture to / from the ceiling bar from below the ceiling, and there is room for improvement.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The problem to be solved by the present invention is to provide a lighting fixture that can improve the workability of construction and removal.

Means for Solving the Problems

[0006] An embodiment is a lighting fixture installed on a ceiling bar of a suspended ceiling system. The lighting fixture includes a fixture body disposed on the upper surface side of the ceiling bar, and a mounting member disposed on the lower surface side of the ceiling bar and attached to the fixture body with the ceiling bar interposed therebetween.

Effects of the Invention

[0007] According to the embodiment, it can be expected to provide a lighting fixture that can improve the workability of construction and removal. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of a lighting fixture installed on a ceiling bar, illustrating one embodiment of the fixture. [Figure 2] This is a front view of the lighting fixture installed on the ceiling bar shown above. [Figure 3] This is a cross-sectional view of a lighting fixture installed on the ceiling bar shown above. [Figure 4] This is a front view showing the installation procedure for the same lighting fixture. [Figure 5] This is a front view showing the installation procedure following Figure 4 of the same lighting fixture. [Figure 6] This is a front view showing the installation procedure following Figure 5 of the same lighting fixture. [Modes for carrying out the invention]

[0009] One embodiment will be described below with reference to the drawings.

[0010] Figures 1 to 3 show the lighting fixture 10. The lighting fixture 10 is a lighting fixture for a system ceiling, which is installed in a system ceiling, such as one used in the ceiling of an office.

[0011] In a system ceiling, ceiling bars 11 called T-bars are installed by hangers or the like on suspension bolts that hang down from the building's ceiling slab, and lighting fixtures 10 are placed across the space between parallel, opposing ceiling bars 11. The ceiling bar 11 has a vertical section 12, a suspension section 13 provided on the upper end of the vertical section 12, and a support section 14 provided horizontally perpendicular to the lower end of the vertical section 12, and is formed in a roughly inverted T-shape in cross-section. The suspension section 13 is formed in a roughly rectangular frame shape in cross-section that protrudes from both sides of the vertical section 12 and is suspended at multiple points along its longitudinal direction by hangers or the like on suspension bolts that hang down from the building's ceiling. In this way, the ceiling bar 11 is suspended from the building's ceiling slab. The lighting fixtures 10 are then installed on the ceiling bars 11 through openings 15 that open between a pair of parallel, opposing ceiling bars 11 (between the opposing support sections 14 of the pair of ceiling bars 11).

[0012] The lighting fixture 10 comprises a fixture body 20, a light source unit detachably attached to the underside of the fixture body 20, and support members (mounting brackets) 21 and mounting members 22 for attaching the fixture body 20 to the ceiling bar 11. Note that the support member 21 is not mandatory.

[0013] The fixture body 20 is made of sheet metal, for example, and is provided in a long length. The fixture body 20 has an upper central main body portion 25 provided along the longitudinal direction, reflective surface portions 26 that are inclined to expand downward from the lower ends on both sides in the short direction of the main body portion 25, and end surface portions 27 provided at both ends in the longitudinal direction.

[0014] The main body 25 is formed in a roughly U-shape with its cross-section in the shorter direction opening downwards. The main body 25 is equipped with a terminal block 28 for connecting power supply lines, a power supply unit 29 for lighting the light source, and a pair of spring-loaded mounting brackets 30 which are mounting parts for detachably attaching the light source unit.

[0015] The lower end of the end face portion 27 is provided with an edge portion 31 that is bent outward in a roughly L-shape and protrudes. A metal receiving plate 32 for screwing the mounting member 22 to the upper surface of this edge portion 31 is positioned. The receiving plate 32 is provided with a plurality of mounting holes 33, including screw holes, and the edge portion 31 is provided with a plurality of through holes for screw insertion at a position coaxial with the mounting holes 33.

[0016] The width of the fixture body 20 in the shorter direction is wider than the width of the opening 15 between the opposing ceiling bars 11, so that both sides of the fixture body 20 in the shorter direction can be positioned on the support parts 14 of the opposing ceiling bars 11, straddling the opening 15 (see Figure 2).

[0017] Further, the light source unit is provided in a long shape, attached along the lower surface side of the main body portion 25 of the fixture main body 20, and disposed within the fixture main body 20. A light source module in which a plurality of light emitting elements such as LEDs are mounted on a substrate is used as the light source of the light source unit. The light source unit has a pair of mounting springs which are attachment portions to the fixture main body 20, and by engaging the pair of mounting springs with a pair of spring receivers of the fixture main body 20, it is attached to the fixture main body 20 by the spring force of the pair of mounting springs.

[0018] Further, the support member 21 is attached near both ends in the longitudinal direction on the upper surface of the fixture main body 20. The support member 21 has an arm portion 35 that is long along the short side direction of the fixture main body 20 attached to the upper surface of the fixture main body 20, leg portions 36 bent downward from both ends of the arm portion 35, and an engaging portion 37 provided at the lower ends of the leg portions 36. The engaging portion 37 is disposed at the upper end portion of the ceiling bar 11, and has a horizontal placement portion 38 that can be placed on the upper surface of the ceiling bar 11, an inner engaging portion 39 disposed in a region facing the inner surface of the ceiling bar 11, and an outer engaging portion 40 disposed in a region facing the outer surface of the ceiling bar 11. By engaging the engaging portions 37 on both sides with the upper end portions of the ceiling bars 11 on both sides, the position of the fixture main body 20 in the short side direction with respect to the ceiling bar 11 is positioned. In a state where the position of the fixture main body 20 in the short side direction with respect to the ceiling bar 11 is positioned, both side portions in the short side direction of the fixture main body 20 are disposed on the upper surfaces of the support portions 14 of the ceiling bars 11 on both sides.

[0019] Further, the attachment member 22 is disposed along the lower side of the edge portion 31 of the fixture main body 20 with a sandwiching member 43 which is a space interposed therebetween, and is attached to the edge portion 31 of the fixture main body 20 by a screw 44 which is a fixture.

[0020] The mounting member 22 is a long metal plate that is long in a direction intersecting the longitudinal direction of the ceiling bar 11. A clamping member 43 is disposed on the upper surface of the central region in the longitudinal direction. Both ends in the longitudinal direction are disposed below the support portion 14 of the ceiling bar 11. In this disposed state, it is attached to the edge portion 31 of the appliance body 20 with screws 44. The screws 44 are inserted through the mounting member 22, the clamping member 43, and the edge portion 31 of the appliance body 20 and screwed into the mounting holes 33 of the receiving plate 32 to fasten and connect them.

[0021] The clamping member 43 is a long plate along the mounting member 22. The dimension in the longitudinal direction is shorter than that of the mounting member 22 and also shorter than the width of the opening 15 between the opposing ceiling bars 11. The thickness dimension is larger than the thickness of the support portion 14 of the ceiling bar 11. Further, the dimension between the end portion in the longitudinal direction of the clamping member 43 and the end portion in the short direction of the appliance body 20 is smaller than half of the gap obtained by subtracting the longitudinal dimension of the clamping member 43 from the width dimension of the opening 15 of the support portion 14 of the ceiling bar 11.

[0022] Therefore, when the mounting member 22 is being mounted, the clamping member 43 enters the opening 15 between the ceiling bars 11 and is disposed on the lower surface side of the edge portion 31 of the appliance body 20, and the mounting member 22, the clamping member 43, the edge portion 31 of the appliance body 20, and the receiving plate 32 are fastened with the screws 44.

[0023] In the state fastened with the screws 43, since the thickness of the clamping member 43 is larger than the thickness of the support portion 14 of the ceiling bar 11, the mounting member 22 is opposed to the lower surface of the support portion 14 of the ceiling bar 11 with a slight gap, and is configured to prevent the appliance body 20 from floating with respect to the ceiling bar 11. Note that the thickness of the clamping member 43 may be the same as or smaller than the thickness of the support portion 14 of the ceiling bar 11, and the support portion 14 of the ceiling bar 11 may be sandwiched and held between the appliance body 20 and the mounting member 22. Also, the appliance body 20 moves in the short direction, for example, to one side with respect to the ceiling bar 11, and in a state where one end side in the longitudinal direction of the clamping member 43 abuts against the support portion 14 of the ceiling bar 11, the other side of the appliance body 20 is configured to be disposed on the support portion 14 of the ceiling bar 11.

[0024] Next, the installation procedure for the lighting fixture 10 will be explained with reference to Figures 2, 4, and 5.

[0025] As shown in Figure 4, the lighting fixture 10 is positioned at an angle with one side in the shorter direction raised and the other side lowered. The lighting fixture 10 is then inserted from below into the opening 15 between opposing ceiling bars 11, starting from one side in the shorter direction, and pushed upward above the ceiling bars 11 (see Figure 5).

[0026] As shown in Figure 5, the lighting fixture 10 is positioned horizontally above the ceiling bar 11, and the lighting fixture 10 is lowered so that the fixture body 20 enters between the opposing ceiling bars 11.

[0027] As shown in Figure 6, the engaging portions 37 on both sides of the support member 21 are engaged with the upper ends of the opposing ceiling bars 11, and the lower sides of the fixture body 20 in the short direction are positioned on the upper surfaces of the support portions 14 of the opposing ceiling bars 11. At this time, the position of the lighting fixture 10 in the short direction relative to the ceiling bars 11 is determined by the support member 21 that engages with the ceiling bars 11, so that the lower sides of the fixture body 20 in the short direction are always positioned on the upper surfaces of the support portions 14 of the opposing ceiling bars 11.

[0028] Subsequently, as shown in Figure 2, the mounting member 22 and the clamping member 43 are positioned along the edge 31 of the fixture body 20, and the screws 44 are screwed into the receiving plate 32 through the mounting member 22, the clamping member 43, and the edge 31 of the fixture body 20 to secure them in place.

[0029] By attaching the mounting member 22 to the fixture body 20, the mounting member 22 prevents the fixture body 20 from lifting up. Furthermore, since the clamping member 43 is positioned to enter the opening 15 between opposing ceiling bars 11, even if the fixture body 20 moves in the shorter direction relative to the ceiling bar 11, the clamping member 43 will contact the support portion 14 of the ceiling bar 11, preventing both sides of the fixture body 20 in the shorter direction from coming off the support portion 14 of the ceiling bar 11, and maintaining its attached state to the ceiling bar 11. Therefore, even if the support member 21 is not provided, the fixture body 20 will not come off the support portion 14 of the ceiling bar 11.

[0030] On the other hand, when removing the lighting fixture 10, the procedure should be the reverse of the installation procedure. That is, loosen the screws 44 to detach the mounting member 22 and the clamping member 43 from the edge 31 of the fixture body 20, push the lighting fixture 10 upwards above the ceiling bar 11, and position it at an angle in the direction of its shorter side, then pull it downwards through the opening 15 between the opposing ceiling bars 11 to remove it.

[0031] Generally, to prevent the lighting fixture 10 from floating up, a hooking member was used that hooked onto the lower side of the ceiling bar 11 on a support member 21 placed on the ceiling bar 11. Therefore, it was difficult to push up the lighting fixture 10 and detach the hooking member from the lower side of the ceiling bar 11. Consequently, when installing or removing the lighting fixture 10, the support member 21 and the fixture body 20 had to be separated, and the fixture body 20 had to be attached to or detached from the support member 21 installed on the ceiling bar 11, which made the installation and removal work time-consuming and laborious.

[0032] In the lighting fixture 10 of this embodiment, the mounting member 22, which is positioned on the lower side of the ceiling bar 11, is attached to the fixture body 20, which is positioned on the upper side of the ceiling bar 11, via the ceiling bar 11. This mounting structure improves the ease of installation and removal.

[0033] The mounting member 22 is long in a direction that intersects the longitudinal direction of the ceiling bar 11, and both ends are positioned on the underside of the ceiling bar 11, thereby preventing the fixture body 20 from floating up relative to the ceiling bar 11.

[0034] When a clamping member 43 is provided between the mounting member 22 and the fixture body 20, the clamping member 43 is positioned in the opening 15 between opposing ceiling bars 11, allowing the degree to which the ceiling bar 11 is clamped between the mounting member 22 and the fixture body 20 to be set, and also restricting the movement of the fixture body 20 in the short direction, thereby preventing the fixture body 20 from falling off the ceiling bar 11.

[0035] If a support member 21 is provided that engages with the upper end of the ceiling bar 11, the position of the fixture body 20 in the short-side direction can be positioned.

[0036] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of symbols]

[0037] 10 Lighting fixtures 11 Ceiling Bar 20 Main body of the device 21 Support member 22 Mounting components

Claims

1. A lighting fixture installed on a ceiling bar of a system ceiling, The fixture body is positioned on the upper side of the ceiling bar; A mounting member is positioned on the lower side of the ceiling bar and attached to the fixture body with the ceiling bar in between; A lighting fixture characterized by having the following features.

2. The mounting member is elongated in a direction intersecting the longitudinal direction of the ceiling bar, with both ends positioned on the underside of the ceiling bar. The lighting fixture according to feature 1.

3. The fixture body includes a support member that is attached to the upper end of the ceiling bar. The lighting fixture according to feature 1.

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