Lighting device and engagement tool attached to the same

Abstract

To provide a lighting device which is attached to a bar member forming a system ceiling by a worker and can be attached to bar members having different dimensions or shapes, and to provide an engagement tool attached to the lighting device.SOLUTION: A lighting device is attached to a bar member forming a system ceiling and having a head provided at an upper part. The lighting device includes: a lamp which emits light to a part to which light is radiated; an elongated light fitting attached with the lamp; attachment tools each having a holding part placed on the head of the bar member, and an engagement part engaged with a lower end of the head, each attachment tool attached to the light fitting; and engagement tools each of which is attached to the light fitting so as to engage with a lower end of a head of another bar member, having a different length dimension from an upper end to a lower end of the head from that of the bar member, when the light fitting is attached to the other bar member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a lighting device that is attached to a system ceiling and a fastener that is attached to the lighting device. [Background technology]

[0002] It has been known in the past to divide a single floor into multiple sections to allow multiple tenants to occupy it, with the aim of increasing the asset value of an office building (see, for example, Patent Document 1). In such a floor that employs a cell type divided into multiple sections, each section can be renovated (remodeled) in accordance with the wishes of the tenant, and the ceiling can also be renovated.

[0003] Furthermore, conventionally, system ceilings (also called ceiling systems) have been known as ceilings that are easy to maintain (see, for example, Patent Document 2). In a cell-type floor that employs such a system ceiling, it is possible to renovate each section, including the ceiling, and in this case, it is conceivable that the bar members (also called T-bars) that make up the system ceiling will be replaced with ones of different dimensions or shapes. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6991536 [Patent Document 2] Japanese Patent Publication No. 2021-173064 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the past, when a floor was mixed with bar members of different sizes or shapes and a renovation was carried out that involved the relocation of equipment such as lighting devices or air conditioning equipment that could continue to be used, there was a problem that the equipment might not fit the bar members to which it was being relocated, making it impossible to install the equipment.

[0006] The present disclosure is intended to solve such problems, and aims to provide a lighting device that can be attached by a worker to bar members that make up a system ceiling, and a fastening device that can be attached to the lighting device, which can be attached to bar members of different dimensions or shapes. [Means for solving the problem]

[0007] The lighting device according to the present disclosure is a lighting device that is attached to a bar member that forms a system ceiling and has a head provided at the top, and includes: a lighting fixture that emits light to an irradiated area; a long lighting fixture to which the lighting fixture is attached; a mounting device that is attached to the lighting fixture and has a holding portion that is placed on the head of the bar member and a locking portion that locks onto the lower end of the head; and a locking device that is attached to the lighting fixture so as to lock onto the lower end of the head of the other bar member when the lighting fixture is attached to another bar member whose length dimension from the upper end to the lower end of the head is different from that of the bar member.

[0008] Furthermore, the fastening device according to the present disclosure is a fastening device to be attached to a lighting device attached to a bar member that forms a system ceiling and has a head provided at the top, and includes: a lighting fixture that emits light to an irradiated portion; a long, shaped lighting fixture to which the lighting fixture is attached; and a mounting fixture that has a holding portion that is placed on the head of the bar member and a locking portion that locks to the lower end of the head and is attached to the lighting fixture.When the lighting fixture is attached to another bar member whose length dimension from the upper end to the lower end of the head is different from that of the bar member, the fastening device is attached to the lighting fixture so as to lock to the lower end of the head of the other bar member. [Effects of the Invention]

[0009] According to the present disclosure, the lighting device includes a fastener that is attached to the lighting device so as to engage with the lower end of the head of another bar member when the lighting device is removed from the bar member and attached to another bar member having a different length dimension from the upper end to the lower end of the head of the first bar member, thereby enabling the lighting device to be attached to bar members of different dimensions or shapes. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing an outline of an illumination device according to a first embodiment. [Figure 2] 1 is an exploded perspective view showing an outline of a lighting device according to a first embodiment. [Figure 3] 1 is a perspective view showing an outline of a fastener according to a first embodiment. [Figure 4] 1 is a front view showing an outline of a fastener according to a first embodiment. [Figure 5] FIG. 10 is a perspective view showing an outline of a fastener according to a second embodiment. [Figure 6] FIG. 10 is a perspective view showing an outline of a fastener according to a second embodiment, with the bar member omitted. [Figure 7] FIG. 10 is an exploded perspective view showing an outline of a locking device according to a second embodiment. [Figure 8] FIG. 10 is a front view showing an outline of a fastener according to a second embodiment. [Figure 9] FIG. 10 is a perspective view showing an outline of a first modified example of a fastener according to the second embodiment. [Figure 10] FIG. 10 is a perspective view showing an outline of a third modified example of the fastener according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of a lighting device 1 according to the present disclosure will be described below with reference to the drawings. In each drawing, identical or equivalent components are designated by the same reference numerals, and this applies throughout the entire specification. Furthermore, throughout the entire specification, the direction from the floor to the ceiling, i.e., the Z1 direction of the Z direction, may be referred to as the "upper direction," and the ceiling side may be referred to as the "upper side." Similarly, the perpendicular direction from the ceiling to the floor, i.e., the Z2 direction, may be referred to as the "downward direction," and the floor side may be referred to as the "lower side." The X and Y directions are perpendicular to the Z direction. Furthermore, in the following description, the terms "inside" and "outside" (including inside, outside, inner surface, and outer surface) may be used to describe positional relationships and directions. Unless otherwise specified, the central portion of the lighting device 1 is referred to as the "inside," and the outer side of the lighting device 1 is referred to as the "outside." Note that the relative dimensions or shapes of the components in each drawing may differ from those in the actual product.

[0012] Embodiment 1 FIG. 1 is a perspective view showing an outline of a lighting device 1 according to the first embodiment. FIG. 2 is an exploded perspective view showing an outline of the lighting device 1 according to the first embodiment. FIG. 3 is a perspective view showing an outline of a fastener 4 according to the first embodiment. FIG. 4 is a front view showing an outline of the fastener 4 according to the first embodiment. The configuration of the lighting device 1 will be described below with reference to FIGS. 1 to 4. The lighting device 1 according to the first embodiment is a lighting device for a system ceiling that is attached to a bar member 100 constituting a system ceiling (also referred to as a ceiling system) using a mounting fixture 3. The bar member 100 according to the first embodiment is an attachment portion of the lighting device 1, and is a T-bar having a substantially T-shaped cross section. As shown in FIG. 3, the bar member 100 has a plate-shaped main body 101, a head 102 provided on an upper part of the main body 101, and a flange 103 provided on a lower part of the main body 101, and the head 102 and the flange 103 are each formed integrally with the main body 101. The bar member 100 is generally available in types with different cross-sectional shapes.

[0013] 1 and 2, the lighting device 1 includes a lighting fixture (light source unit) 10 that emits light to an illuminated area when power is supplied from an external power source (not shown), a lighting fixture to which the lighting fixture 10 is attached, and a mounting fixture 3 that mounts the lighting device 1 to a bar member 100. The lighting fixture is made up of a fixture main body 20 and a frame 30, and the fixture main body 20 is attached to the frame 30 using fasteners 8 such as screws and washers.

[0014] <Lamp 10> As shown in FIG. 2, the lighting fixture 10 is elongated and emits light when power is supplied from an external power source (not shown). The lighting fixture 10 includes a base (not shown), a light-emitting source (not shown) arranged on the irradiated portion side of the base, a power source (not shown) arranged on the opposite side of the irradiated portion of the base, and a cover 12. The power supplied from the external power source is converted into lighting power by the power source, and the light-emitting source lights up (emits light) when the lighting power is supplied. The cover 12 is elongated and attached to the base so as to cover the light-emitting source. The cover 12 is molded using a translucent resin such as polycarbonate or acrylic. The power source may be provided in the fixture body 20 or external to the lighting device 1.

[0015] <Apparatus main body 20> 2, the fixture body 20 is elongated and has the lamp 10 detachably attached thereto. The fixture body 20 has a housing 21 to which the lamp 10 is attached, a reflecting portion 22 that reflects light emitted by the lamp 10, and end plates 23 attached to both ends of the housing 21 in the longitudinal direction X. An opening 29 is formed on the downward direction Z2 side of the housing 21.

[0016] The storage section 21 is where the lighting fixture 10 is attached. The storage section 21 is elongated and has a concave shape recessed upward in the Z1 direction. When the lighting fixture 10 is attached to the storage section 21, the opening 29 is covered by the lighting fixture 10. The lighting fixture 10 is attached to the storage section 21 via the opening 29, and is also removed from the storage section 21 via the opening 29.

[0017] The reflecting portions 22 are plate-shaped and reflect light emitted from the light source and transmitted through the cover 12, thereby improving the luminous efficiency of the lighting fixture 10. The reflecting portions 22 are provided at both ends of the opening 29 in the short-side direction Y. The reflecting portions 22 are also provided so as to become more spaced apart from each other in the short-side direction Y as they protrude downward in the Z2 direction. When the lighting device 1 is attached to the bar member 100, the ends of the reflecting portions 22 on the downward Z2 side are placed on the bar member 100.

[0018] The end plate portions 23 are plate-shaped and are attached to the reflecting portion 22 so as to cover both ends of the reflecting portion 22 in the longitudinal direction X.

[0019] <Frame part 30> As shown in FIG. 2, the frame portion 30 is frame-shaped, and the device main body portion 20 is attached to the frame portion 30 using a fixing device 8.

[0020] <Mounting fixture 3> 2 and 3, the mounting fixture 3 is attached to the outer surface 33 of the frame 30. As shown in FIG. 4, the mounting fixture 3 has a holding portion 3a that is placed on the upper end of the head 102 of the bar member 100, and a locking portion 3b that is locked to the lower end of the head 102. The lighting device 1 is held on the bar member 100 by being attached to the bar member 100 such that the holding portion 3a and the locking portion 3b of the mounting fixture 3 sandwich the head 102 of the bar member 100 from above and below. Therefore, there is no risk of the lighting device 1 falling off the bar member 100 even when vibration or impact is applied.

[0021] <Latching device 4> The fastener 4 is used when attaching the lighting device 1 to bar members 100 of different types having different cross-sectional shapes. The fastener 4 is suitable for attaching the lighting device 1 to bar members 100 having heads 102 with different shapes, more specifically, bar members 100 having heads 102 with different vertical dimensions H (see FIG. 4) in the vertical direction.

[0022] As shown in FIG. 3, the fastener 4 has a main portion 41 fixed to the frame portion 30 and an auxiliary fastener 42 that fastens to the lower end of the head portion 102, which has a different vertical dimension H (see FIG. 4) of the bar member 100. The main portion 41 is plate-shaped and has a substantially L-shaped cross section. In other words, the main portion 41 is made up of two flat portions that are substantially perpendicular to each other. For convenience, one flat portion of the bent main portion 41 is referred to as the first main portion 41a, and the other flat portion is referred to as the second main portion 41b. The auxiliary fasteners 42 are provided at the end of the main portion 41 opposite the bent portion 44, which is the boundary between the first main portion 41a and the second main portion 41b. For convenience, the auxiliary locking portion 42 provided at the end opposite the bent portion 44 in the first main portion 41a will be referred to as the first auxiliary locking portion 42a, and the auxiliary locking portion 42 provided at the end opposite the bent portion 44 in the second main portion 41b will be referred to as the second auxiliary locking portion 42b.

[0023] The first main portion 41a is provided with a screw hole 43a through which a screw serving as a fastener 8 used to connect (fix) the locking device 4 to the frame portion 30 is inserted. Similarly, the second main portion 41b is provided with a screw hole 43b through which a screw serving as a fastener 8 used to connect (fix) the locking device 4 to the frame portion 30 is inserted.

[0024] When the first auxiliary locking portion 42a is used to lock onto the lower end of the head 102 of the bar member 100, the second main portion 41b is fixed to the frame portion 30 using a fixing device 8 such as a screw. When the second auxiliary locking portion 42b is used to lock onto the lower end of the head 102 of the bar member 100, the first main portion 41a is fixed to the frame portion 30 using a fixing device 8 such as a screw. In the first embodiment, the first main portion 41a and the second main portion 41b are fixed to the lower surface portion 34 of the frame portion 30, but the present invention is not limited to this and they may be fixed to the upper surface portion 31 of the frame portion 30.

[0025] The position in the longitudinal direction of the frame 30 where the locking device 4 is attached can be selected arbitrarily during construction work, except for the position where the mounting device 3 is attached. For example, a tapping screw (self-tapping screw) can be used as the fixing device 8. The fixing device 8 may be screwed directly into the frame 30, or if the frame 30 has a through-hole (not shown), it may be screwed into the through-hole.

[0026] 3, the main portion 41 has a length dimension L1 from the bent portion 44 to the first auxiliary locking portion 42a, which is different from a length dimension L2 from the bent portion 44 to the second auxiliary locking portion 42b, and the length dimension L1 is shorter than the length dimension L2. In other words, the length of the first main portion 41a is shorter than the length of the second main portion 41b.

[0027] The first auxiliary locking portion 42a can be used when there is no need to add a light-blocking member or the like below the lighting device 1 and the lighting device 1 is attached to the bar member 100 with the frame 30 and the bar member 100 in close proximity. On the other hand, the second auxiliary locking portion 42b can be used when there is a need to add a light-blocking member or the like below the lighting device 1 and the lighting device 1 is attached to the bar member 100 with the frame 30 and the bar member 100 spaced apart.

[0028] The locking device 4 can be used when attaching the lighting device 1 to two types of bar members 100 with different cross-sectional shapes. For example, the first auxiliary locking portion 42a can be used when attaching the lighting device 1 to a bar member 100 with a head portion 102 that is small in size in the vertical direction. The second auxiliary locking portion 42b can be used when attaching the lighting device 1 to a bar member 100 with a head portion 102 that is large in size in the vertical direction.

[0029] At the beginning, he mentioned that in order to increase the asset value of office buildings, a single floor is divided into multiple sections to allow multiple tenants to occupy it, and that in so-called cell-type floors, each section can be renovated (remodeled) in accordance with the wishes of the tenant, and that ceilings can also be renovated.

[0030] In facilities such as office buildings, there are cases where the boundaries of sections (partitions, floor plans) are changed, or so-called cellular floors are changed to so-called open floors.

[0031] In this case, it is conceivable that bar members 100 of different shapes that make up the system ceiling, which have been renewed for each section in the cell-type floor, will coexist in the changed section or floor, and that the coexisting bar members 100 of different shapes will continue to be used.

[0032] The fastening device 4 also functions effectively when relocating an existing lighting device 1 or installing a newly manufactured lighting device 1 in a system ceiling where bar members 100 of different shapes coexist during renewal construction.

[0033] Furthermore, when relocating existing lighting devices 1 or installing newly manufactured lighting devices 1 in a changed section or floor, it takes a considerable amount of time to understand in advance the information on all of the bar members 100 that make up the system ceiling. For this reason, it is conceivable that the relocation of existing lighting devices 1 or the arrangement of new lighting devices 1 will be planned or new lighting devices 1 will be arranged based on the information on some of the bar members 100 that make up the system ceiling.

[0034] Even if it is discovered after the fact that the system ceiling of the section or floor to be constructed contains bar members 100 of different shapes that were not anticipated beforehand, the fastening device 4 functions effectively when relocating the existing lighting device 1 or installing a newly manufactured lighting device 1. Therefore, there is no risk of changes in plans such as modifying the lighting device 1, arranging additional parts for the modification, or returning the newly ordered lighting device 1, and there is also no risk of increases in construction costs and time due to changes in plans.

[0035] In this way, the fastening device 4 has the effect of achieving both quality and economy in the renewal construction of the lighting device 1. Note that a predetermined number of fastening devices 4 may be supplied (distributed) together with or attached to a newly manufactured lighting device 1, or the required number may be supplied (distributed) separately.

[0036] When the lighting device 1 is newly manufactured, a fixing mechanism (such as a screw hole into which a screw is screwed) for fixing the fixing device 8 used when attaching the locking device 4 to the frame 30 may be formed in advance. Here, the screw hole serving as the fixing mechanism may be subjected to burring. Furthermore, the screw hole may have a screw thread formed on its inner periphery.

[0037] As described above, the lighting device 1 according to embodiment 1 is a lighting device 1 that is attached to a bar member 100 that forms a system ceiling and has a head 102 provided at the top, and includes a lighting fixture 10 that emits light to an irradiated area, a long lighting fixture to which the lighting fixture 10 is attached, a mounting device 3 that has a holding portion 3a that is placed on the head 102 of the bar member 100 and a locking portion 3b that locks onto the lower end of the head 102 and is attached to the lighting fixture, and a locking device 4 that is attached to the lighting fixture so as to lock onto the lower end of the head 120 of the other bar member 100 when the lighting fixture is attached to another bar member 100 whose length dimension from the upper end to the lower end of the head 102 is different from that of the bar member 100.

[0038] Furthermore, the fastening device 4 of embodiment 1 is a fastening device 4 attached to a lighting device 1 attached to a bar member 100 that forms a system ceiling and has a head 102 provided at the top, and when the lighting device of the lighting device 1 includes a lamp 10 that emits light to an irradiated area, a long lighting fixture to which the lamp 10 is attached, and a mounting device 3 that has a holding portion 3a placed on the head 120 of the bar member 100 and a locking portion 3b that locks to the lower end of the head 102 and is attached to the lighting fixture, the fastening device 4 is attached to the lighting fixture so as to lock to the lower end of the head 102 of the other bar member 100 when the lighting fixture is attached to another bar member 100 whose length dimension from the upper end to the lower end of the head 102 is different from that of the bar member 100.

[0039] According to the first embodiment, the lighting device 1 includes a locking device 4 that is attached to the lighting device so as to lock onto the lower end of the head 102 of another bar member 100 when the lighting fixture is removed from the bar member 100 and attached to another bar member 100 having a different length dimension from the upper end to the lower end of the head 102 of the other bar member 100. Therefore, the lighting device 1 can be attached to bar members 100 having different dimensions or shapes.

[0040] Embodiment 2 Hereinafter, the second embodiment will be described, but the description of the same content as in the first embodiment will be omitted, and the same or corresponding parts as in the first embodiment will be denoted by the same reference numerals. The second embodiment will be described mainly focusing on the differences from the first embodiment.

[0041] The fastener 4 according to the first embodiment has been described as being fixed to the frame 30 of the lighting device 1 using fasteners 8 such as screws. For example, when relocating and continuing to use an existing lighting device 1 during renewal (remodeling) construction, additional work needs to be performed on the lighting device 1, which poses a problem from the perspective of maintaining construction efficiency and construction quality. Therefore, the fastener 400 according to the second embodiment is designed so that additional work is not required when continuing to use the existing lighting device 1.

[0042] Fig. 5 is a perspective view showing an outline of fastener 400 according to embodiment 2. Fig. 6 is a perspective view showing an outline of fastener 400 according to embodiment 2, omitting bar member 100. Fig. 7 is an exploded perspective view showing an outline of fastener 400 according to embodiment 2. The configuration of fastener 400 according to embodiment 2 will be described below with reference to Figs. 5 to 7.

[0043] The fastener 400 according to the second embodiment is used when the lighting device 1 is attached to bar members 100 of different types having different cross-sectional shapes. The fastener 400 is suitable for attaching the lighting device 1 to bar members 100 having heads 102 with different shapes, more specifically, bar members 100 having heads 102 with different vertical dimensions H in the vertical direction.

[0044] The fastener 400 is composed of a first fastener 410 and a second fastener 420. The first fastener 410 has a main portion 411 fixed to the second fastener 420, and an auxiliary fastener 412 that is fastened to the lower end of the head 102 of the bar member 100, which has a different dimension H in the up-down direction. The main portion 411 is plate-shaped and consists of two flat portions with a connecting portion 414 in between. The connecting portion 414 is rectangular, and the two main portions 411 are provided extending in opposite directions from opposing end sides of the connecting portion 414. The fastener 400 has a substantially Z-shaped cross section.

[0045] For convenience, one flat surface of the main portion 411 with the connecting portion 414 therebetween will be referred to as the first main portion 411a, and the other flat surface will be referred to as the second main portion 411b. An auxiliary locking portion 412 is provided at each end of the main portion 411 opposite the connecting portion 414. For convenience, the auxiliary locking portion 412 provided at the end of the first main portion 411a opposite the connecting portion 414 will be referred to as the first auxiliary locking portion 412a, and the auxiliary locking portion 412 provided at the end of the second main portion 411b opposite the connecting portion 414 will be referred to as the second auxiliary locking portion 412b.

[0046] The first main portion 411a is provided with a screw hole 413a into which a screw serving as a fixing device 8 used to connect (fix) the second locking device 420 to the first locking device 410 is screwed. The second main portion 411b is provided with a screw hole 413b into which a screw serving as a fixing device 8 used to connect (fix) the second locking device 420 to the first locking device 410 is screwed.

[0047] The second fastener 420 has an upper part 421 placed on the upper surface 31 of the frame 30, an inner part 422 arranged inside the frame 30, and an outer part 423 arranged on the outer surface 33 of the frame 30 and connected (fixed) to the first fastener 410. The outer part 423 of the second fastener 420 is provided with a screw insertion hole 424 through which a screw, which is a fastener 8 used when connecting (fixing) the second fastener 420 to the first fastener 410, is inserted.

[0048] Fig. 8 is a front view showing an outline of fastener 400 according to embodiment 2. As shown in Fig. 8, fastener 400 is attached to frame 30 so as to clamp (grasp, grip) frame 30. More specifically, in fastener 400, with first fastener 410 and second fastener 420 connected (fixed), an upper portion 421 of second fastener 420 is disposed on upper surface 31 of frame 30, a main portion 411 (first main portion 411a or second main portion 411b) of first fastener 410 and an inner portion 422 of second fastener 420 are disposed on inner surface 32 of frame 30, an outer portion 423 of second fastener 420 is disposed on outer surface 33 of frame 30, and a connecting portion 414 of first fastener 410 is disposed on lower surface 34 of frame 30. The first fastening device 410 and the second fastening device 420 surround the frame portion 30, and the fastening device 400 is attached to the lighting device 1 by wrapping around the frame portion 30. Therefore, when using the fastening device 400 to relocate and continue using an existing lighting device 1, there is no need to perform additional work on the lighting device 1, improving the efficiency of the installation work and enabling the maintenance of installation quality.

[0049] The position in the longitudinal direction of the frame 30 where the locking device 400 is attached can be selected arbitrarily during the installation work, except for the position where the mounting device 3 is attached.

[0050] 7, the main portion 41 has a length dimension L1 from the end of the connecting portion 414 on the first main portion 411a side to the first auxiliary locking portion 412a, which is different from a length dimension L2 from the end of the connecting portion 414 on the second main portion 411b side to the second auxiliary locking portion 412b, which is based on the connecting portion 414, and the length dimension L1 is smaller than the length dimension L2. In other words, the length of the first main portion 411a is shorter than the length of the second main portion 411b.

[0051] The first auxiliary locking portion 412a can be used when there is no need to add a light-blocking member or the like below the lighting device 1 and the lighting device 1 is attached to the bar member 100 with the frame 30 and the bar member 100 in close proximity. On the other hand, the second auxiliary locking portion 412b can be used when there is a need to add a light-blocking member or the like below the lighting device 1 and the lighting device 1 is attached to the bar member 100 with the frame 30 and the bar member 100 spaced apart.

[0052] The locking device 400 can be used when attaching the lighting device 1 to two types of bar members 100 with different cross-sectional shapes. For example, the first auxiliary locking portion 412a can be used when attaching the lighting device 1 to a bar member 100 with a head portion 102 that is small in size in the vertical direction. The second auxiliary locking portion 412b can be used when attaching the lighting device 1 to a bar member 100 with a head portion 102 that is large in size in the vertical direction.

[0053] (Variation 1) FIG. 9 is a perspective view showing an outline of a first modified example of locking device 400 according to embodiment 2. Locking device 400 according to embodiment 2 may have a positioning function relative to frame 30. Specifically, if a protrusion 35 that protrudes upward is provided on top surface 31 of frame 30 in an existing lighting device 1, fitting portion 425 such as a through hole that fits with protrusion 35 is provided on upper portion 421 of second locking device 420. This determines the position of second locking device 420 relative to frame 30, facilitating the work of connecting (fixing) first locking device 410 and attaching locking device 400. Furthermore, due to the positioning function, the attachment position of locking device 400 relative to frame 30 is fixed and movement is restricted. After the locking device 400 is attached to the frame 30, it is expected that the lighting device 1 will continue to be subjected to vibrations for a long period of time, but the positioning function prevents the locking device 400 from gradually moving from its original attachment position on the frame 30 or the attachment position of the locking device 400 from becoming misaligned. This makes it possible to prevent the locking device 400 from malfunctioning.

[0054] (Variation 2) The locking device 400 according to the second embodiment may have another positioning function relative to the frame 30. Specifically, if the existing lighting device 1 has a recessed portion or a through-hole (not shown) recessed downward from the upper surface 31 of the frame 30, a protrusion or the like (not shown) that fits into the recessed portion or the through-hole is provided on the upper portion 421 of the second locking device 420. This determines the position of the second locking device 420 relative to the frame 30, facilitating the work of connecting (fixing) the first locking device 410 and attaching the locking device 400. Furthermore, the positioning function of the locking device 400 fixes the attachment position relative to the frame 30 and restricts movement. After the locking device 400 is attached to the frame 30, it is expected that the lighting device 1 will continue to be subjected to vibrations for a long period of time, but the positioning function prevents the locking device 400 from gradually moving from its original attachment position on the frame 30 or the attachment position of the locking device 400 from becoming misaligned. This makes it possible to prevent the locking device 400 from malfunctioning.

[0055] (Variation 3) FIG. 10 is a perspective view illustrating an outline of a third modified example of the fastener 400 according to the second embodiment. The fastener 400 according to the second embodiment may be attached to a frame 30 that is provided with a movement restricting function that restricts movement of the fastener 400. Specifically, a pair of protrusions 35 that protrude upward is provided on the upper surface 31 of the frame 30 of the existing lighting device 1. The pair of protrusions 35 are provided at a distance in the longitudinal direction X of the frame 30 that is greater than the width of the fastener 400. Therefore, when attached to the frame 30, the fastener 400 is caught by the protrusions 35. Therefore, the frame 30 cannot move beyond the protrusions 35 in the longitudinal direction X. After the fastener 400 is attached to the frame 30, it is expected that the lighting device 1 will continue to be subjected to vibrations for a long period of time. However, the movement restricting function prevents the fastener 400 from moving from its original attachment position on the frame 30 and preventing the attachment position of the fastener 400 from becoming misaligned. Therefore, it is possible to prevent the locking tool 400 from malfunctioning.

[0056] As described above, in the lighting device 1 according to the second embodiment, the locking device 400 is attached to the frame portion 30 by clamping the frame portion 30.

[0057] According to the lighting device 1 of embodiment 2, when the fastening device 400 is used to relocate and continue using an existing lighting device 1, there is no need to perform additional work on the lighting device 1, which improves the efficiency of the installation work and makes it possible to maintain the installation quality.

[0058] Embodiment 3 Hereinafter, the third embodiment will be described, but the description of the same content as in the first and second embodiments will be omitted, and the same reference numerals will be used to denote the same or corresponding parts as in the first and second embodiments. The third embodiment will be described mainly focusing on the differences from the first and second embodiments.

[0059] In the above-mentioned renewal (remodeling) construction, if the mounting fixture 3 provided on the lighting device 1 becomes unusable, that is, if the mounting fixture 3 must be removed from the lighting device 1, the function of the mounting fixture 3 may be replaced by the above-mentioned locking device 4 or locking device 400.

[0060] Embodiment 4 Hereinafter, the fourth embodiment will be described, but the description of the same content as in the first to third embodiments will be omitted, and the same parts as or corresponding parts to the first to third embodiments will be denoted by the same reference numerals. The fourth embodiment will be described mainly with respect to the differences from the first to third embodiments.

[0061] The above-described fastening device 400 may be used for purposes other than attaching the lighting device 1 to a bar member 100 of a type having a different cross-sectional shape. For example, it may be used additionally for purposes such as improving the vibration resistance and impact resistance of a lighting device 1 that has been installed in the past and supplementing the strength of the mounting fixture 3. Furthermore, the fastening device 400 may be supplied (distributed) independently for purposes other than renewal (remodeling) construction.

[0062] Embodiment 5. Hereinafter, the fifth embodiment will be described, but the description of the same content as in the first to fourth embodiments will be omitted, and the same or corresponding parts as in the first to fourth embodiments will be denoted by the same reference numerals. The fifth embodiment will be described mainly focusing on the differences from the first to fourth embodiments.

[0063] Although not shown in the figures, the lighting device 1 according to the fifth embodiment has an identification means. The identification means functions as a means for identifying that the lighting device 1 is attached to a bar member so as to satisfy special installation conditions different from normal installation conditions. The identification means is, for example, an adhesive sticker attached to a position visible from the lighting space side, such as the reflecting portion 22. The identification means may have visibility that allows a worker to identify it, such as the presence or absence of the identification means, the shape or color of the identification means, or letters or symbols attached to the identification means. The identification means is provided on the lighting device 1 attached to the bar member so as to satisfy special installation conditions different from normal installation conditions, or in the vicinity of the lighting device 1.

[0064] The lighting devices 1 according to the first and second embodiments are attached to bar members having different cross-sectional shapes using a fastener. Furthermore, the lighting device 1 according to the third embodiment uses a fastener to replace the function of the fixture 3 when the fixture 3 becomes unusable, that is, when the fixture 3 must be removed from the lighting device 1. The lighting device 1 according to the fourth embodiment additionally uses a fastener for purposes other than renewal (remodeling) construction. In other words, the lighting devices 1 shown in the first to fourth embodiments are attached to bar members so as to satisfy special construction conditions that differ from normal construction conditions.

[0065] Such lighting device 1 needs to satisfy special installation conditions even during the next renewal (remodeling) work. Therefore, the above-mentioned identification means effectively functions as a means for a worker to recognize whether or not lighting device 1 has been attached to a bar member so as to satisfy the special installation conditions during the next renewal (remodeling) work.

[0066] The identification means is not limited to one that can be identified visually by an operator. For example, an identification system may be employed that can recognize whether the lighting device 1 is attached to the bar member so as to satisfy special installation conditions by reading the code attached to the identification means using a control terminal or the like with an imaging function.

[0067] The identification system may also store information regarding whether the lighting device 1 is attached to a bar member so as to satisfy special installation conditions in the lighting device 1 or in a server on a network. The information regarding whether the lighting device 1 is attached to a bar member so as to satisfy special installation conditions may include information such as the product model number and serial number for identifying the lighting device 1, the type and number of fasteners used to attach the lighting device 1, and the type of bar member to which the lighting device 1 is attached. The stored information contributes to improving the economy and efficiency of the next renewal (remodeling) construction.

[0068] Various aspects of the present disclosure are described below.

[0069] (Appendix 1) A lighting device that constitutes a system ceiling and is attached to a bar member having a head provided at an upper portion, a lighting fixture that emits light to an irradiated part; a lighting fixture having an elongated shape and to which the lighting device is attached; a mounting fixture that is attached to the lighting fixture and has a holding portion that is placed on the head of the bar member and a locking portion that is locked to a lower end of the head; and a locking device that is attached to the lighting fixture so as to lock onto the lower end of the head of another bar member when the lighting fixture is attached to another bar member having a length dimension from the upper end to the lower end of the head that is different from the bar member. Lighting equipment. (Appendix 2) The locking device is The lighting fixture has an auxiliary locking portion that is locked to the lower end of the head of the other bar member when the lighting fixture is attached to the other bar member. 10. The lighting device of claim 1. (Appendix 3) The locking device is The auxiliary locking portion has a plurality of 10. The lighting device of claim 2. (Appendix 4) The lighting fixture comprises: a frame-shaped frame portion to which the mounting fixture is attached; an appliance main body attached to the frame, The locking device is Attached to the frame 4. The lighting device according to claim 1, wherein the light source is a light source. (Appendix 5) The locking device is Attached to the frame using a fastener 5. The lighting device of claim 4. (Appendix 6) The locking device is The frame is attached by clamping the frame. 5. The lighting device of claim 4. (Appendix 7) The fastener is composed of a first fastener and a second fastener, the first fastening device has a main portion fixed to the second fastening device and the auxiliary fastening portion, The second fastener has an upper portion placed on the upper surface of the frame, an inner portion disposed inside the frame, and an outer portion disposed on the outer surface of the frame and connected to the first fastener. 10. The lighting device according to claim 6, which is dependent on claim 2 or claim 3. (Appendix 8) a protrusion that protrudes upward is provided on the top surface of the frame, The upper portion of the second fastening member is provided with a fitting portion that fits with the protrusion. 8. The lighting device of claim 7. (Appendix 9) A fixture attached to a lighting device attached to a bar member that constitutes a system ceiling and has a head provided at an upper part, a lighting fixture that emits light to an irradiated part; a lighting fixture having an elongated shape and to which the lighting device is attached; the lighting fixture of the lighting device includes a mounting fixture that has a holding portion that is placed on the head of the bar member and a locking portion that is locked to a lower end of the head, and is attached to the lighting fixture, When the head is attached to another bar member having a length dimension from the top end to the bottom end that is different from the bar member, the head is attached to the lighting fixture so as to be engaged with the bottom end of the head of the other bar member. Locking device. [Explanation of symbols]

[0070] REFERENCE SIGNS LIST 1 lighting device, 3 mounting fixture, 3a holding portion, 3b locking portion, 4 locking device, 8 fixing device, 10 lighting fixture, 12 cover, 20 fixture body portion, 21 housing portion, 22 reflecting portion, 23 end plate portion, 29 opening, 30 frame portion, 31 upper surface portion, 32 inner surface portion, 33 outer surface portion, 34 lower surface portion, 35 protruding portion, 41 main portion, 41a first main portion, 41b second main portion, 42 auxiliary locking portion, 42a first auxiliary locking portion, 42b second auxiliary locking portion, 43a screw hole, 43b screw hole, 44 bending portion, 100 bar member, 101 main body portion, 102 head portion, 103 flange portion, 120 head portion, 400 locking device, 410 first locking device, 411 Main portion, 411a first main portion, 411b second main portion, 412 auxiliary locking portion, 412a first auxiliary locking portion, 412b second auxiliary locking portion, 413a screw hole, 413b screw hole, 414 connecting portion, 420 second locking device, 421 upper portion, 422 inner portion, 423 outer portion, 424 screw insertion hole, 425 fitting portion.

Claims

1. A lighting device that constitutes a system ceiling and is attached to a bar member having a head provided at an upper portion, a lighting fixture that emits light to an irradiated area; a lighting fixture having an elongated shape and to which the lighting device is attached; a mounting fixture that is attached to the lighting fixture and has a holding portion that is placed on the head of the bar member and a locking portion that is locked to a lower end of the head; and a locking device that is attached to the lighting fixture so as to lock onto the lower end of the head of another bar member when the lighting fixture is attached to another bar member having a length dimension from the upper end to the lower end of the head that is different from the bar member. Lighting equipment.

2. The locking device is The lighting fixture has an auxiliary locking portion that is locked to the lower end of the head of the other bar member when the lighting fixture is attached to the other bar member. The lighting device according to claim 1 .

3. The locking device is The auxiliary locking portion has a plurality of 3. The lighting device according to claim 2.

4. The lighting fixture comprises: a frame portion having a frame shape and to which the mounting fixture is attached; an appliance main body attached to the frame, The locking device is Attached to the frame The lighting device according to claim 2 or 3.

5. The locking device is Attached to the frame using a fastener 5. The lighting device according to claim 4.

6. The locking device is The frame is attached by clamping the frame.

5. The lighting device according to claim 4.

7. The fastener is composed of a first fastener and a second fastener, the first fastening device has a main portion fixed to the second fastening device and the auxiliary fastening portion, The second fastener has an upper portion placed on the upper surface of the frame, an inner portion disposed inside the frame, and an outer portion disposed on the outer surface of the frame and connected to the first fastener.

7. The lighting device according to claim 6.

8. a protrusion that protrudes upward is provided on the top surface of the frame, The upper portion of the second fastening tool is provided with a fitting portion that fits with the protrusion.

8. The lighting device according to claim 7.

9. A fixture attached to a lighting device attached to a bar member that constitutes a system ceiling and has a head provided at an upper part, a lighting fixture that emits light to an irradiated area; a lighting fixture having an elongated shape and to which the lighting device is attached; the lighting fixture of the lighting device includes a mounting fixture that has a holding portion that is placed on the head of the bar member and a locking portion that is locked to a lower end of the head, and is attached to the lighting fixture, When the head is attached to another bar member having a length dimension from the top end to the bottom end that is different from the bar member, the head is attached to the lighting fixture so as to be engaged with the bottom end of the head of the other bar member. Locking device.

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