lighting fixtures

Abstract

To simplify work for fall prevention.SOLUTION: A lighting fixture A1 includes a plurality of light source units 1, a connection member 4, a plurality of fastening parts 46 and a plurality of fixation parts 47. The plurality of light source units 1 each radiates illumination light. The connection member 4 connects the plurality of light source units 1 to each other. The plurality of fastening parts 46 each fastens the connection member 4 to each of the plurality of light source units 1. The plurality of fixation parts 47 are fixed to the plurality of light source units 1 respectively via the connection member 4. The plurality of fixation parts 47 each does not come into contact with the connection member 4 when the connection member 4 is at its home position, and comes into contact with the connection member 4 when the connection member 4 moves from its home position.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to lighting fixtures, and more particularly to lighting fixtures that are installed at elevated locations. [Background technology]

[0002] The lighting fixture described in Patent Document 1 is an example of a conventional lighting fixture installed at a high location. The lighting fixture described in Patent Document 1 (hereinafter referred to as the conventional example) is attached to a frame installed in a stadium such as a baseball field or a sports field, and projects light diagonally downward from above the spectator seats onto an area including the playing field. The conventional example comprises multiple light-emitting units that function as the fixture body, front covers provided on the front of each light-emitting unit, and an arm portion that supports these light-emitting units. The arm portion rotatably supports the multiple light-emitting units. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-27698 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional example, one end of a fall prevention wire is attached to each light-emitting unit.

[0005] However, the above-mentioned conventional example has a problem in that it is time-consuming to attach the fall prevention wire to the light projecting unit and the mounting base, etc.

[0006] An object of the present disclosure is to provide a lighting fixture that can simplify the work required to prevent it from falling. [Means for solving the problem]

[0007] A lighting device according to one aspect of the present disclosure includes a plurality of light source units, a connecting member, a plurality of fastening parts, and a plurality of fixing parts. Each of the plurality of light source units emits illumination light. The connecting member connects the plurality of light source units to each other. Each of the plurality of fastening parts fastens each of the plurality of light source units to the connecting member. The plurality of fixing parts are fixed to each of the plurality of light source units via the connecting member. Each of the plurality of fixing parts does not contact the connecting member when the connecting member is in a fixed position, and can contact the connecting member when the connecting member moves from the fixed position. [Effects of the Invention]

[0008] The lighting fixture of the present disclosure has the advantage of being able to simplify the work required to prevent it from falling. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is an exploded perspective view of the lighting fixture. [Figure 3] FIG. 3 is a left side view of the lighting fixture. [Figure 4] FIG. 4 is a rear view of the lighting fixture. [Figure 5] FIG. 5 is an exploded perspective view of the main part of the lighting fixture. [Figure 6] FIG. 6 is a cross-sectional view of a main part of the lighting fixture. DETAILED DESCRIPTION OF THE INVENTION

[0010] A lighting device according to an embodiment of the present disclosure will be described in detail with reference to the drawings. However, the drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components do not necessarily reflect the actual dimensional ratios. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0011] (1) Overview The lighting fixture A1 according to the embodiment includes a plurality of (two in the illustrated example) light source units 1, a connecting member 4, a plurality of fastening parts 46, and a plurality of fixing parts 47 (see FIG. 1). The lighting fixture A1 according to the embodiment includes two connecting members 4 having the same structure.

[0012] Each of the multiple light source units 1 emits illumination light. The connecting member 4 connects the multiple light source units 1 together. Each of the multiple fastening parts 46 fastens each of the multiple light source units 1 to the connecting member 4. The multiple fastening parts 46 are, for example, screws (hexagonal bolts). The multiple fixing parts 47 are fixed to each of the multiple light source units 1 via the connecting member 4. The multiple fixing parts 47 are, for example, shoulder screws, which will be described later. Each of the multiple fixing parts 47 does not come into contact with the connecting member 4 when the connecting member 4 is in a fixed position, but can come into contact with the connecting member 4 when the connecting member 4 moves from its fixed position.

[0013] Therefore, in the lighting fixture A1 according to this embodiment, the fixing parts 47 do not come into contact with the connecting member 4 when the connecting member 4 is in a fixed position, and therefore the connecting member 4 does not apply a load (the weight of the light source unit 1) to the fixing parts 47. Therefore, the fixing parts 47 are less likely to deteriorate or loosen over time than the fastening parts 46, which are constantly subjected to a load (the weight of the light source unit 1) from the connecting member 4.

[0014] Furthermore, in the lighting device A1 of the embodiment, even if at least one of the multiple fastening parts 46 becomes loose and causes the connecting member 4 to move, the movement of the connecting member 4 can be restricted by at least one of the multiple fixing parts 47 coming into contact with the connecting member 4.

[0015] As a result, lighting fixture A1 according to the embodiment can prevent light source units 1 from falling by connecting members 4 that connect multiple light source units 1, without using fall prevention wires as in conventional examples. Therefore, lighting fixture A1 according to the embodiment does not require the work of installing fall prevention wires, and can simplify the work required to prevent falling compared to conventional examples that use fall prevention wires.

[0016] (2) Details A lighting fixture A1 according to this embodiment (hereinafter simply referred to as lighting fixture A1) is a floodlight primarily used for illuminating (floodlighting) soccer stadiums, various sports fields, school playgrounds, etc. In the following description, unless otherwise specified, the up-down, front-back, left-right directions indicated by arrows in Fig. 1 are defined as the up-down, front-back, left-right directions of lighting fixture A1.

[0017] The lighting fixture A1 includes two light source units 1, a pair of connecting members 4, a plurality of fastening parts 46, and a plurality of fixing parts 47 (see FIG. 1). The lighting fixture A1 also includes a support member 3 that rotatably supports the two light source units 1, and a display member 5 that displays the angle by which the two light source units 1 have rotated relative to the support member 3 (see FIGS. 1 and 2). The lighting fixture A1 also includes a power supply unit 2 that turns on the two light source units 1, and a pair of connecting members 4 that connect the two light source units 1. However, the number of light source units 1 included in the lighting fixture A1 is not limited to two, and may be three or more.

[0018] (2-1) Light source unit The two light source units 1 have the same configuration. Each light source unit 1 includes an LED module (not shown), a cover 11, and a heat dissipation block 12.

[0019] The LED module is configured by mounting multiple LEDs (not shown) on the front surface of a rectangular substrate (not shown). Each LED is, for example, a packaged white LED for lighting. The substrate is, for example, a metal-based substrate with an aluminum plate as the base. The multiple LEDs are mounted on the front surface of the substrate, aligned at equal intervals in all directions (top, bottom, left, and right).

[0020] The heat dissipation block 12 has a base portion 120 and a plurality of heat dissipation plates 121 (see FIG. 4). The base portion 120 is formed, for example, from an aluminum alloy in the shape of a rectangular flat plate. An LED module is attached to the front surface of the base portion 120, thereby mechanically and thermally connecting the substrate of the LED module to the base portion 120. The plurality of heat dissipation plates 121 are formed, for example, from an aluminum alloy in the shape of a flat plate. These plurality of heat dissipation plates 121 are attached to the rear surface of the base portion 120 at regular intervals (see FIG. 4). The heat dissipation block 12 efficiently dissipates heat generated by the plurality of LEDs when they are lit, thereby suppressing a rise in temperature of the LED module and improving light-emitting efficiency, for example.

[0021] The cover 11 is formed in the shape of a flat box with an open rear surface and is made of a translucent synthetic resin material such as acrylic resin or polycarbonate resin. However, the material for the cover 11 is not limited to synthetic resin, and it may be made of inorganic glass such as quartz glass. The cover 11 is attached to the front surface of the base unit 120 so as to cover the LED module from the front. The gap between the cover 11 and the base unit 120 is sealed with a sealing member (not shown). Note that multiple lenses may be provided on the inner bottom surface (rear surface) of the cover 11. These multiple lenses are provided in one-to-one correspondence with the multiple LEDs and are configured to collect light (illumination light) emitted from each LED.

[0022] (2-2) Connecting member The pair of connecting members 4 have the same configuration. Each connecting member 4 has a main piece 40, a front piece 41, and a rear piece 42 (see FIGS. 1 to 5). The main piece 40 is formed in a rectangular flat plate shape. The front piece 41 is formed in a flat plate shape and protrudes in the thickness direction of the main piece 40 from one end (front end) along the longitudinal direction of the main piece 40. The rear piece 42 is formed in a trapezoidal flat plate shape and protrudes in the thickness direction of the main piece 40 from the other end (rear end) along the longitudinal direction of the main piece 40 (see FIG. 5). However, the main piece 40, the front piece 41, and the rear piece 42 are integrally formed by bending a single metal plate.

[0023] The main piece 40 has two circular first holes 401, two oval second holes 402, and two oval insertion holes 403 (see FIG. 5). The two first holes 401 are provided in the center of the main piece 40 in the longitudinal direction, lined up along the longitudinal direction of the main piece 40. The two second holes 402 are provided, one at each end of the main piece 40 in the longitudinal direction. The two insertion holes 403 are provided, one at each position between the first holes 401 and the second holes 402 in the longitudinal direction of the main piece 40.

[0024] The front piece 41 has a trapezoidal central portion in the longitudinal direction (see FIG. 5). The rear piece 42 has two fitting portions 420 (see FIG. 4). Each of the two fitting portions 420 is formed as an oval through-hole. These two fitting portions 420 are aligned along the longitudinal direction of the rear piece 42.

[0025] One connecting member 4 is fastened to the left side surfaces of the base portions 120 of two light source units 1 arranged vertically by two fastening parts (hexagon bolts) 46 on each side (four in total). Of the four fastening parts 46, one is inserted into each of the two first holes 401 and the two second holes 402 in the main piece 40. The two fastening parts 46, one each inserted into the first hole 401 and the second hole 402 on one side (upper side) in the longitudinal direction, are screwed one by one into two screw holes 1200 provided in the base portion 120 of the upper light source unit 1. Similarly, the two fastening parts 46, one each inserted into the first hole 401 and the second hole 402 on the other side (lower side) in the longitudinal direction, are screwed one by one into two screw holes 1200 provided in the base portion 120 of the lower light source unit 1. Similarly, the other connecting member 4 is fastened to the right side surfaces of the base portions 120 of the two light source units 1 arranged vertically with two fastening parts (hexagon bolts) 46 (four in total). Note that the two fitting portions 420 provided on the rear piece 42 fit into protrusions 1202 provided on the base portions 120 of the two light source units 1 (see FIG. 4).

[0026] Furthermore, one fixing part 47 is inserted into each of the two insertion holes 403 of each connecting member 4. The fixing part 47 is a hexagon bolt, a so-called shoulder screw, having a threaded portion 470, a head 471, and a cylindrical portion 472 (see FIG. 6). The cylindrical portion 472 is formed in a cylindrical shape with a diameter larger than the diameter of the threaded portion 470 and smaller than the maximum diameter of the head 471 (the length of the line segment connecting the opposing vertices of the hexagon). The threaded portion 470 of the fixing part 47 inserted into each insertion hole 403 is screwed into a threaded hole 1201 provided between two threaded holes 1200 in the base portion 120.

[0027] Thus, the two light source units 1 are connected by a pair of connecting members 4 in a state where they are arranged in two stages, one above the other.

[0028] Here, in each connecting member 4, the multiple insertion holes 403 through which the fixing parts 47 are inserted are each larger than the width of the cylindrical portion 472 and smaller than the width of the head portion (471) (see FIG. 6). Therefore, when the connecting member 4 is in a fixed position, the fixing parts 47 (cylindrical portion 472) and the connecting member 4 do not come into contact with each other (see FIG. 6). Note that the fixed position is the position when the connecting member 4 is fastened to the base portion 120 by the four fastening parts 46. On the other hand, if the connecting member 4 moves from the fixed position due to loosening or falling off of the fastening parts 46, the fixing parts 47 (cylindrical portion 472) can come into contact with the connecting member 4 (such as the inner circumferential surface of the insertion hole 403).

[0029] (2-3) Power supply unit The power supply unit 2 includes a power supply device (not shown) and a power supply case 20 that houses the power supply device.

[0030] The power supply device converts AC power supplied from a commercial power system into DC power, and operates to make the DC current supplied to the LED module of the light source unit 1 coincide with a target value (for example, the rated current value of the LED module). However, the power supply device may have a function (dimming function) to adjust the target value of the DC current supplied to the LED module to a value lower than the rated current value.

[0031] The power supply case 20 has a box-shaped case body 21 with one open side (rear side), and a case lid 22 that closes the open side (rear side) of the case body 21. Both the case body 21 and the case lid 22 are made of an aluminum alloy.

[0032] One mounting portion 23 is provided on each of the left and right side surfaces of the case body 21 (see FIG. 2). Each mounting portion 23 is formed in a cylindrical shape and is formed integrally with the case body 21 so as to protrude in the left-right direction from approximately the center in the up-down direction of both the left and right side surfaces of the case body 21.

[0033] A screw hole 230 is provided in the center of the bottom surface of each mounting portion 23 (see FIG. 2). Furthermore, three protrusions 231 are provided around the screw hole 230 on the bottom surface of one mounting portion 23 (left side). These three protrusions 231 are all formed in a cylindrical shape and are arranged at equal intervals on a concentric circle centered on the screw hole 230. Furthermore, a female screw portion 234 is provided between the two protrusions 231 on the bottom surface of one mounting portion 23 (left side) (see FIG. 2).

[0034] The power supply unit 2 is fixed to the two light source units 1 by a pair of fixing bases 6 (see FIGS. 1 to 4). Each fixing base 6 has a fixing plate 60 and a pair of side plates 61. The fixing plate 60 is formed in the shape of a roughly rectangular flat plate (see FIG. 3). However, the fixing plate 60 has a plurality of (four in the illustrated example) ventilation holes 600 (see FIG. 3). The fixing plate 60 is mechanically connected to the power supply unit 2 by fastening its rear end to the case body 21 with a plurality of (four in the illustrated example) screws 601 (see FIG. 4).

[0035] The pair of side plates 61 are formed integrally with the fixed plate 60 so as to protrude in the left-right direction from the upper and lower edges of the fixed plate 60, respectively. Each side plate 61 is mechanically connected to the light source unit 1 by fastening its front end to the base part 120 of the heat dissipation block 12 with a plurality of screws 602 (two in the illustrated example) (see FIG. 4). Thus, the power supply unit 2 is fixed to one light source unit 1 (heat dissipation block 12) by the pair of fixing bases 6.

[0036] (2-4) Display material The display member 5 is formed into a disk shape from a metal plate (see FIG. 2). A cylindrical recess 53 is provided in the center of the display member 5. The recess 53 is recessed from the front surface (display surface 50) of the display member 5 toward the back surface. A circular insertion hole 530 penetrates through the center of the circle in the bottom surface of the recess 53. Three positioning holes 531 penetrate around the insertion hole 530 in the bottom surface of the recess 53 so as to be aligned at equal intervals. Furthermore, a circular mounting hole 532 penetrates between the two positioning holes 531 in the bottom surface of the recess 53.

[0037] A plurality of first scales 51 and a plurality of second scales 52 are marked on a display surface 50 of the display member 5. The plurality of first scales 51 and the plurality of second scales 52 are represented by line segments along the radial direction of the display surface 50, and are, for example, engraved on the display surface 50. However, the display member 5 may print the plurality of first scales 51 and the plurality of second scales 52 on the display surface 50. Alternatively, the display member 5 may affix a sticker on which the plurality of first scales 51 and the plurality of second scales 52 are printed to the display surface 50.

[0038] A stopper 54 is provided on the periphery of the display member 5. The stopper 54 is cut and raised so as to protrude from the display surface 50 of the display member 5 toward the rear surface.

[0039] (2-5) Support member The support member 3, also called an arm, has a fixed part 30, a pair of arm parts 31 rising diagonally upward from both the left and right ends of the fixed part 30, attachment parts 32 provided at the tips (upper ends) of the pair of arm parts 31, and a support part 33 provided on the left arm part 31 (see FIG. 2). However, the support member 3 is formed by processing a metal plate, and the fixed part 30, the pair of arm parts 31, the pair of attachment parts 32, and the support part 33 are integrally formed.

[0040] The fixing portion 30 has a first insertion hole 301, a second insertion hole 302, a plurality of third scales 303, and a plurality of fourth scales 304 (see FIG. 2). The first insertion hole 301 is a circular hole that passes through approximately the center of the fixing portion 30 in the thickness direction (up and down direction) of the fixing portion 30. The second insertion hole 302 is a semicircular arc-shaped elongated hole that passes through the fixing portion 30 in the thickness direction, with the first insertion hole 301 as its center. Note that the second insertion hole 302, excluding both ends, is located behind the first insertion hole 301 (see FIG. 2). The fixing portion 30 is fixed to a stand (a facility for installing the lighting fixture A1) using a bolt that is inserted through the first insertion hole 301 and a bolt that is inserted through the second insertion hole 302. Furthermore, the fixing part 30 is rotatable around the bolts inserted through the first insertion holes 301 as fulcrums (rotation axes) when the nuts tightening the bolts are loosened.

[0041] A plurality of third scales 303 and a plurality of fourth scales 304 are marked on the display surface 300 of the fixed part 30. The plurality of third scales 303 and the plurality of fourth scales 304 are represented by line segments along the radial direction of the rotation axis (the bolt inserted into the first insertion hole 301) on the display surface 300, and are engraved on the display surface 300, for example. However, the fixed part 30 may print the plurality of third scales 303 and the plurality of fourth scales 304 on the display surface 300. Alternatively, the fixed part 30 may attach a sticker on which the plurality of third scales 303 and the plurality of fourth scales 304 are printed to the display surface 300. The plurality of third scales 303 and the plurality of fourth scales 304 are marked at equal intervals on the display surface 300 along the rotation direction of the fixed part 30 (the circumferential direction of the first insertion hole 301).

[0042] A pair of arms 31 rises obliquely upward and forward from both the left and right ends of the fixed part 30 (see FIG. 3). An attachment part 32 is integrally provided at the tip of each arm 31. Each attachment part 32 is semicircular, with a round hole 320 penetrating through its center (see FIG. 2).

[0043] The indicator 33 is formed in a substantially trapezoidal shape when viewed from the left-right direction, and protrudes rearward from the rear edge at the tip of the left arm 31 (below the left mounting portion 32) (see FIG. 3). The upper edge of the indicator 33 overlaps with the display surface 50 of the display member 5 in a plan view from the left (see FIG. 3). In other words, the indicator 33 can indicate the angle by which the light source unit 1 has rotated with respect to the support member 3 using the scales (first scale 51 and second scale 52) of the display member 5 that overlap with the upper edge of the indicator 33. Note that the indicator 33 has a mark 330 printed on its surface to clearly indicate the upper edge that should be aligned with the scales (first scale 51 and second scale 52) of the display member 5 (see FIG. 2).

[0044] The support member 3 has a locking mechanism 34 for locking the rotation of the display member 5. The locking mechanism 34 has a handle 340 and a fixing bracket 341 (see FIG. 4). The handle 340 is formed by bending a metal rod into an L-shape. A male screw 342 is integrally formed at the tip of the handle 340 (see FIG. 4).

[0045] Fixing metal fitting 341 is formed in a square gutter shape from a metal plate (see FIG. 4). Fixing metal fitting 341 has a through hole at one end in the longitudinal direction on the bottom surface, and has a protrusion 3410 for preventing rotation at the other end in the longitudinal direction.

[0046] The locking mechanism 34 accommodates a nut inside the fixing bracket 341, and after inserting and hooking a protrusion 3410 into a hole 331 provided in the indication portion 33, the male screw 342 of the handle 340 is inserted into the through-hole of the fixing bracket 341 through the hole provided in the indication portion 33. The locking mechanism 34 is then attached to the indication portion 33 (support member 3) by tightening a nut onto the male screw 342 protruding inside the fixing bracket 341. The nut is prevented from rotating by abutting against the inner surface of the fixing bracket 341. The display member 5 is inserted into the gap between the fixing bracket 341 and the indication portion 33 (see FIG. 4).

[0047] Thus, when the handle 340 is rotated clockwise (right), the locking mechanism 34 prevents the nut and the fixing bracket 341 from rotating, so that the fixing bracket 341 moves in a direction approaching the indicator portion 33, and the display member 5 is sandwiched and fixed between the fixing bracket 341 and the indicator portion 33. This allows the locking mechanism 34 to lock the rotation of the display member 5. On the other hand, when the handle 340 is rotated counterclockwise (left), the locking mechanism 34 moves the fixing bracket 341 in a direction away from the indicator portion 33, allowing the display member 5 to rotate.

[0048] (2-6) Assembly procedure for lighting fixtures Next, the assembly procedure for the lighting device A1 will be described. However, the assembly procedure described below is only an example, and the order of some steps may be changed.

[0049] First, the worker performing the assembly work lines up two light source units 1 in the short direction and connects them using two connecting members 4. Then, the worker attaches the power supply unit 2 to the back of one of the light source units 1 using a pair of fixing bases 6.

[0050] Next, the worker positions the display member 5 on the mounting portion 23 by inserting three protrusions 231 provided on one (left side) of the mounting portion 23 one by one into three positioning holes 531 that penetrate the bottom surface of the recess 53. Then, the worker attaches the display member 5 to the mounting portion 23 of the power supply case 20 by screwing the screws 55 inserted into the mounting holes 532 of the display member 5 into the female threads 234 of the mounting portion 23.

[0051] Next, the worker inserts the mounting screws 233, which have been inserted through the cylindrical spacers 232 (see FIG. 2), into the round holes 320 of the pair of mounting portions 32 of the support member 3, and screws them into the screw holes 230 provided in the mounting portions 23 of the power supply case 20. Thus, by sandwiching the spacers 232 between the heads of the mounting screws 233 and the bottom surfaces of the mounting portions 23, the support member 3 can rotatably support the two light source units 1 via the power supply case 20 and the pair of fixing bases 6.

[0052] The above steps complete the assembly of the lighting fixture A1.

[0053] (2-7) Advantages of the embodiment As described above, lighting fixture A1 has a plurality of fixing parts 47 fixed to each of two light source units 1 via connecting members 4 that connect the two light source units 1 (see FIG. 1). Each of the plurality of fixing parts 47 does not come into contact with connecting member 4 when connecting member 4 is in a fixed position, but can come into contact with connecting member 4 when connecting member 4 moves from the fixed position.

[0054] Therefore, in lighting device A1, when connecting member 4 is in a fixed position, the plurality of fixing parts 47 do not come into contact with connecting member 4, and therefore the connecting member 4 does not apply a load (weight of light source unit 1) to the plurality of fixing parts 47. Therefore, the plurality of fixing parts 47 are less likely to deteriorate or loosen over time than the plurality of fastening parts 46, which are constantly subjected to a load (weight of light source unit 1) from connecting member 4.

[0055] Furthermore, even if at least one of the multiple fastening parts 46 becomes loose and the connecting member 4 moves, the lighting device A1 can restrict the movement of the connecting member 4 by having at least one of the multiple fixing parts 47 come into contact with the connecting member 4.

[0056] As a result, lighting fixture A1 can prevent light source units 1 from falling by using connecting members 4 that connect multiple light source units 1, without using fall prevention wires as in conventional examples. Therefore, lighting fixture A1 does not require the work of installing fall prevention wires, and the work required to prevent falling can be simplified compared to conventional examples that use fall prevention wires.

[0057] Here, lighting fixture A1 uses a shoulder screw as fixing part 47. That is, fixing part 47 has a threaded part 470 that screws into a threaded hole 1201 provided in base part 120 of light source unit 1, a hexagonal prism-shaped head part 471, and a cylindrical part 472 that connects threaded part 470 and head part 471. Furthermore, connecting member 4 has a plurality of insertion holes 403 into which threaded part 470 and cylindrical part 472 are respectively inserted (see FIGS. 5 and 6). Each of the plurality of insertion holes 403 is larger than the width of cylindrical part 472 of fixing part 47 and smaller than the width of head part 471 (see FIG. 6). Therefore, when connecting member 4 is in a fixed position, a gap is generated between the inner circumferential surface of insertion hole 403 and cylindrical part 472 of fixing part 47, and fixing part 47 and connecting member 4 do not come into contact with each other. On the other hand, if the connecting member 4 moves from its fixed position, the inner peripheral surface of the insertion hole 403 and the cylindrical portion 472 of the fixed part 47 can come into contact with each other.

[0058] Thus, by using a general-purpose part (a shoulder screw) for the fixing part 47, the lighting fixture A1 can reduce manufacturing costs.

[0059] Furthermore, since the lighting device A1 has multiple insertion holes 403 each formed in an elongated (oval) shape, it is possible to prevent the fixing part 47 from coming into contact with the connecting member 4 when the connecting member 4 is in a fixed position due to dimensional errors (tolerances) of the connecting member 4 and the light source unit 1 (base portion 120).

[0060] Furthermore, the connecting member 4 has a main piece 40 that is fastened to the two light source units 1 by a plurality of fastening parts 46, and a pair of side pieces (front piece 41, rear piece 42) that protrude from both ends of the main piece 40 and sandwich the two light source units 1 (see FIGS. 1 to 4). In other words, since the lighting fixture A1 sandwiches the ends of the two light source units 1 from the front and rear directions with the connecting member 4 formed in a square gutter shape, it is possible to prevent the light source units 1 from tipping forward or backward if the fastening parts 46 fall off.

[0061] Furthermore, the lighting device A1 has a fitting portion 420 on the rear piece 42 of the connecting member 4, and a protrusion 1202 provided on the light source unit 1 (base portion 120) fits into the fitting portion 420 (see FIGS. 4 and 6). Therefore, the lighting device A1 can easily position the connecting member 4 with respect to the two light source units 1, thereby improving the workability of the connection work (assembly work) of the two light source units 1 using the connecting member 4. However, the lighting device A1 may have a protrusion on the connecting member 4, and a fitting portion (recess) that fits into the protrusion may be provided on the base portion 120.

[0062] (3) Summary A lighting fixture (A1) according to a first aspect of the present disclosure includes a plurality of light source units (1), a connecting member (4), a plurality of fastening parts (46), and a plurality of fixing parts (47). Each of the plurality of light source units (1) emits illumination light. The connecting member (4) connects the plurality of light source units (1) to each other. Each of the plurality of fastening parts (46) fastens each of the plurality of light source units (1) to the connecting member (4). The plurality of fixing parts (47) are fixed to each of the plurality of light source units (1) via the connecting member (4). Each of the plurality of fixing parts (47) does not come into contact with the connecting member (4) when the connecting member (4) is in a fixed position, and can come into contact with the connecting member (4) when the connecting member (4) moves from the fixed position.

[0063] In the lighting fixture (A1) according to the first aspect, even if at least one of the fastening parts (46) becomes loose and the connecting member (4) moves, at least one of the fixing parts (47) comes into contact with the connecting member (4), thereby restricting the movement of the connecting member (4). As a result, the lighting fixture (A1) according to the first aspect can prevent the light source units (1) from falling by using the connecting member (4) that connects the multiple light source units (1) without using a fall prevention wire as in the conventional example. Therefore, the lighting fixture (A1) according to the first aspect can simplify the work required to prevent the light source units (1) from falling, compared to the conventional example that uses a fall prevention wire.

[0064] A lighting fixture (A1) according to a second aspect of the present disclosure can be realized by combining it with the first aspect. In the lighting fixture (A1) according to the second aspect, each of the fixing components (47) preferably has a threaded portion (470) threaded into threaded holes (1201) provided in the light source units (1), a head (471), and a cylindrical portion (472) connecting the threaded portion (470) and the head (471). The connecting member (4) preferably has a plurality of insertion holes (403) through which the threaded portion (470) and the cylindrical portion (472) are inserted. Each of the plurality of insertion holes (403) preferably has a width greater than the width of the cylindrical portion (472) and smaller than the width of the head (471).

[0065] The lighting fixture (A1) according to the second aspect can reduce manufacturing costs by using a general-purpose part (a shoulder screw) as the fixing part (47).

[0066] A lighting device (A1) according to a third aspect of the present disclosure can be realized by combining it with the second aspect. In the lighting device (A1) according to the third aspect, it is preferable that each of the plurality of insertion holes (403) is formed in an elongated shape.

[0067] The lighting fixture (A1) according to the third aspect can prevent the fixing part (47) from coming into contact with the connecting member (4) when the connecting member (4) is in a fixed position due to dimensional errors (tolerances) of the connecting member (4) and the light source unit (1).

[0068] A lighting fixture (A1) according to a fourth aspect of the present disclosure can be realized by combining it with any one of the first to third aspects. In the lighting fixture (A1) according to the fourth aspect, the connecting member (4) preferably has a main piece (40) fastened to the plurality of light source units (1) by a plurality of fastening parts (46), and a pair of side pieces (front piece 41, rear piece 42) protruding from both ends of the main piece (40) and sandwiching the plurality of light source units (1).

[0069] The lighting fixture (A1) according to the fourth aspect can prevent the light source unit (1) from falling down from its fixed position when the fastening part (46) falls off.

[0070] A lighting device (A1) according to a fifth aspect of the present disclosure can be realized by combining it with the fourth aspect. In the lighting device (A1) according to the fifth aspect, it is preferable that at least one of the pair of side pieces (rear piece 42) has a fitting portion (420) that fits with recesses or protrusions (1202) provided on the plurality of light source units (1).

[0071] The lighting fixture (A1) according to the fifth aspect allows the connecting member (4) to be easily positioned relative to the plurality of light source units (1), thereby improving the workability of the connection work (assembly work) of the plurality of light source units (1) using the connecting member (4). [Explanation of symbols]

[0072] A1 Lighting fixture 1 Light source unit 4 Connecting members 40 main piece 41 Front piece (side piece) 42 Rear piece (side piece) 46 Fasteners 47 Fixing parts 403 Insertion hole 420 Fitting part 470 Threaded part 471 Head 472 Cylindrical part 1201 screw hole 1202 protrusion

Claims

1. a plurality of light source units each emitting illumination light; a connecting member that connects the plurality of light source units to each other; a plurality of fastening parts for fastening each of the plurality of light source units to the connecting member; a plurality of fixing components fixed to the plurality of light source units via the connecting members; Equipped with each of the plurality of fixing components does not come into contact with the connecting member when the connecting member is in a fixed position, and is capable of coming into contact with the connecting member when the connecting member is moved from the fixed position; Lighting fixtures.

2. each of the plurality of fixing components has a screw portion to be screwed into a screw hole provided in the plurality of light source units, a head portion, and a cylindrical portion connecting the screw portion and the head portion; the connecting member has a plurality of insertion holes through which the threaded portion and the cylindrical portion are inserted, and each of the plurality of insertion holes is larger than the width of the cylindrical portion and smaller than the width of the head portion; 2. The lighting fixture of claim 1.

3. Each of the plurality of insertion holes is formed in an elongated shape.

3. The lighting fixture according to claim 2.

4. The connecting member has a main piece that is fastened to the plurality of light source units by the plurality of fastening parts, and a pair of side pieces that protrude from both ends of the main piece and sandwich the plurality of light source units. A lighting fixture according to any one of claims 1 to 3.

5. At least one of the pair of side pieces has a fitting portion that fits into a recess or a protrusion provided on the plurality of light source units.

5. The lighting fixture of claim 4.

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