JP6350716B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture provided with a light emitting element as a light source.

  As a lighting fixture, a fixture using an LED, which is an example of a light emitting element, as a light source is known (see, for example, Patent Document 1).

JP 2005-93246 A

Conventional lighting fixtures are used in such a manner that they are fixed and illuminated at a high place such as a ceiling or a wall surface. However, a lighting fixture is installed at a predetermined installation location and is illuminated in a predetermined direction according to the installation location. Etc. are desired.
This invention is made | formed in view of the situation mentioned above, and aims at providing the lighting fixture which can change an irradiation direction.

In order to achieve the above-described object, the present invention provides a lighting fixture including a light-emitting element and a power supply circuit that generates lighting power for the light-emitting element in the fixture main body, wherein the fixture main body includes a light source container that houses the light-emitting element; A power supply container main body provided on the back side of the light source container for housing the power supply circuit; and a substantially flat plate provided between the light source container and the power supply container main body for connecting the light source container and the power supply container main body. And a support arm that rotatably supports the power supply container body is attached to attachment portions provided at both right and left ends of the member, and the center of gravity of the instrument body is the light source container and the member The pivot axis of the support arm extends to the left and right between the light emitting element and the power supply circuit.

  The present invention provides a lighting fixture including a light emitting element and a power supply circuit that generates lighting power for the light emitting element in the fixture body, wherein the fixture main body is separated from the light source container and the light source container. A power supply container body that houses a power supply circuit; and a support arm that rotatably supports the power supply container body, the light source container being provided on the front surface and a substantially flat plate member having the power supply container body provided on the back surface. The member is attached to attachment portions provided at both left and right ends of the member, and the member also serves as a power supply lid of the power supply container main body, and the center of gravity of the instrument main body is located between the light source container and the member. The pivot axis of the support arm extends to the left and right between the light emitting element and the power supply circuit.

  In the above-described configuration, the front end of the attachment portion may protrude forward from the front surface of the member.

  According to the present invention, since the power supply container is provided with the support arm that rotatably supports the power supply container, it can be illuminated in various directions.

It is a front view which shows the flameproof explosion-proof type lighting fixture which concerns on this embodiment of this invention. It is a rear view which shows a pressure-proof explosion-proof lighting fixture. It is sectional drawing which shows a flameproof explosion-proof type lighting fixture. It is a disassembled perspective view which shows an instrument main body. It is the perspective view which looked at the light source container from the top. It is a bottom view which shows a pressure-proof explosion-proof lighting fixture. It is a front view which shows a power supply cover body. It is the perspective view which looked at the explosion-proof type lighting fixture of the state which faced the instrument main body from the front. It is the perspective view which looked at the explosion-proof type lighting fixture of the state which turned the fixture main body upward. It is the perspective view which looked at the explosion-proof type lighting fixture of the state which faced the fixture main body from the front. It is the perspective view which looked at the explosion-proof type lighting fixture of the state which faced the fixture main body from the back.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a flameproof explosion-proof luminaire will be described as an example of an explosion-proof luminaire.
FIG. 1 is a front view showing an explosion-proof luminaire 1 according to this embodiment, and FIG. 2 is a rear view showing the explosion-proof luminaire 1. FIG. 3 is a cross-sectional view showing the explosion-proof luminaire 1. FIG. 4 is an exploded perspective view showing the instrument body 1A. In addition, the directions such as up and down, left and right, and front and back (front and back) described below indicate directions when viewed from the front side in a state where the explosion-proof luminaire 1 is installed.

The explosion-proof explosion-proof lighting device (explosion-proof lighting device) 1 is a lighting device used in a special environment such as a place where explosive gas exists. This explosion-proof luminaire 1 is a so-called explosion-proof structure that can withstand explosion pressure even if volatile gas enters the instrument and explodes inside, and does not ignite external explosive gas. have.
Specifically, as shown in FIG. 1 and FIG. 2, the explosion-proof explosion-proof lighting device 1 includes a device main body 1 </ b> A and a support arm 80. 1 A of instrument main bodies are equipped with the light source container 2, the power supply container 3 joined on this light source container 2, and the terminal box 4 joined on this power supply container 3, and each is as a container of an explosion-proof structure. It is configured. In addition to this, since the joint structure between the light source container 2, the power supply container 3, and the terminal box 4 has the same pressure resistance as the above-mentioned explosion-proof structure, the entire explosion-proof luminaire 1 is required for the explosion-proof. Is satisfied. Although the light source container 2, the power supply container 3, and the terminal box 4 can be formed by various methods, in this embodiment, they are formed by casting. A junction structure among the light source container 2, the power supply container 3, and the terminal box 4 will be described later.

The light source container 2 is a container that houses the LED module 8 that is a light source, and the power supply container 3 is a container that houses a power supply circuit 9 (FIG. 3) that generates lighting power of the LED module 8. Since the power supply circuit 9 is provided in the power supply container 3 that is separate from the light source container 2, the LED module 8 and the power supply circuit 9 are thermally separated. High output of 8 is possible. In addition, it is possible to easily cope with an increase in the size of the power supply circuit 9 accompanying the increase in the output of the LED module 8. In this explosion-proof luminaire 1, for example, a plurality of high-power LED modules 8 are housed in the light source container 2 so as to obtain the same amount of light as a conventional fixture using a 400 W class mercury lamp as a light source.
The terminal box 4 is a container for connecting the power supply circuit 9 and the external lead wire (power supply line) 29 (FIG. 3). The external lead wire 29 is an electrical wiring that is connected outside the explosion-proof luminaire 1 to a power supply line that supplies commercial power.

Next, each part of the explosion-proof luminaire 1 will be described.
As described above, the explosion-proof luminaire 1 is configured by connecting the light source container 2, the power supply container 3, and the terminal box 4.
As illustrated in FIGS. 3 and 4, the light source container 2 includes a light source container main body 10, a translucent member 11, and a guard 12.
The light source container body 10 includes a bottomed cylindrical light source housing portion 13 and a flange 19 formed so as to extend in the radial direction (the outward direction) around the entire periphery of the opening 16 of the light source housing portion 13. And is formed in a general tray (dish) shape having a circular shape in plan view. A plurality of mounting bases 15 are integrally formed on the bottom portion 13 </ b> A of the light source housing portion 13. The mounting bases 15 are provided at substantially equal intervals around the center O (FIG. 1) of the bottom portion 13 </ b> A, and the LED modules 8 are fixed to the respective mounting bases 15. Thereby, as shown in FIG. 1, the some LED module 8 is arrange | positioned around the center O at substantially equal intervals.

  The LED module 8 includes a COB type LED 8A. The COB type LED 8A has a high luminance and high output of a chip-on-board (COB) structure in which a large number of LEDs are densely arranged on an LED substrate to form a planar light emitting portion having a substantially circular shape (which may be a quadrangle). Light-emitting device. The explosion-proof explosion-proof luminaire 1 is provided with a plurality of COB-type LEDs 8A as a light source, thereby realizing high brightness and high output.

  As shown in FIGS. 3 and 4, the translucent member 11 is a transparent disk-shaped pressure-resistant member, and is fitted into the opening 16 of the light source container body 10 so as to cover the LED module 8. Specifically, a stepped portion 18 that is recessed toward the bottom portion 13 </ b> A is formed in the opening 16 of the light source container body 10, and the edge portion 17 of the translucent member 11 is supported by the stepped portion 18.

The guard 12 is a member that protects the translucent member 11 from collision of an external object, and is attached to the light source container body 10 so as to cover the translucent member 11.
More specifically, the guard 12 includes an annular portion (flange) 20 that is planarly joined to the flange 19 of the light source container body 10. As shown in FIG. 3, the annular portion 20 has a width W (length extending in the radial direction (direction toward the outside)) W at least as large as that of the flange 19, and the annular portion 20 includes a large number of bolts 21. Thus, the light source container body 10 is firmly fastened to the flange 19. Thereby, the guard 12 can be fixed to the light source container body 10 with sufficient strength. As shown in FIG. 1, the annular portion 20 includes an annular guard portion 22 disposed substantially at the center, and a rod-shaped guard portion extending radially from the annular guard portion 22 and coupled to the annular portion 20. The guard member 24 which has 23 integrally is provided. In the light source container body 10, the COB type LED 8A is disposed so as to be exposed from between the respective bar-shaped guard portions 23, and the shadow of the bar-shaped guard portion 23 is hardly generated in the irradiation field.

Further, as shown in FIG. 3, the annular step 20 of the guard 12 is formed with a holding step portion 25 and an annular recess 26 over the entire circumference on the surface of the light source container body 10 on the side in contact with the flange 19. Has been. The edge portion 17 of the translucent member 11 is engaged with the restraining step portion 25, and the translucent member 11 is firmly restrained as the annular portion 20 is fixed to the flange 19 with the bolt 21, so that the explosion-proof explosion-proof. A structured container is constructed. As described above, since the transparent member 11 is sandwiched between the guard 12 and the light source container body 10, the explosion-proof performance of the light source container 2 is enhanced. Moreover, the annular recessed part 26 is provided in the outer peripheral side rather than the control step part 25, and the space | interval between the light source container main body 10 and the guard 12 is sealed by the O-ring 27 being fitted.
As shown in FIG. 4, an annular plate-shaped packing 45 is sandwiched between the translucent member 11, the light source container body 10, and the guard 12.

FIG. 5 is a perspective view of the light source container 2 as seen from above.
As shown in FIG. 5, the light source container 2 is integrally formed with a large number of plate-like heat radiation fins 40 extending from the back surface 10 </ b> A of the light source container body 10 to the outer peripheral surface 10 </ b> B. These radiating fins 40 are members for radiating heat generated by the internal COB type LED 8A (FIG. 1). As a result, even when the COB type LED 8A, which is a high-intensity, high-power LED, is used as the light source, the temperature of the COB type LED 8A can be suppressed to a temperature at which proper operation is possible by these heat radiation fins 40.

Here, as described above, the step portion 18 into which the translucent member 11 is fitted is formed in the opening 16 of the light source container body 10. As shown in FIG. 3, the step portion 18 is recessed from the opening 16 by a depth α. Therefore, in this step portion 18, the thickness T of the flange 19 is reduced by the depth α of the step portion 18, and the strength is increased. become weak. For this reason, when an explosion occurs inside the light source container 2, the stepped portion 18 is easily broken and a predetermined pressure-proof explosion-proof performance cannot be obtained.
Therefore, in the light source container body 10, one end portion 40 </ b> A of some radiating fins 40 is extended to a position corresponding to the stepped portion 18, and the strength is compensated by these radiating fins 40.
More specifically, as shown in FIG. 5, on the back surface 10 </ b> A side of the flange 19 of the light source container body 10, convex portions 41 constituting receiving portions are provided at the fastening portions of the bolts 21. Some of the heat radiating fins 40 have one end portion 40A connected to the convex portion 41, so that the heat radiating fins 40 extend to a position corresponding to the stepped portion 18 described above, whereby the strength of the stepped portion 18 is reinforced. . Thereby, the explosion-proof performance of the light source container 2 is not lowered by the formation of the convex portion 30.

On the back surface 10A of the light source container main body 10, a convex portion 30 is provided at substantially the center. The convex part 30 has a flat substantially disk shape on the back surface 30 </ b> A, and forms a flat joint surface with the power supply container 3. The convex portion 30 protrudes to a position at least higher than the surrounding heat radiation fins 40, and the power supply container 3 is coupled to the back surface 10A side while extending the heat radiation fins 40 directly behind the back surface 10A, that is, the internal LED module 8. It is possible.
As shown in FIG. 3, a wiring through hole 31 is formed in the approximate center of the convex portion 30, and a bush 32 is press-fitted into the wiring through hole 31. It is firmly held down. Insertion holes 33 </ b> A and 33 </ b> B pass through the bush 32, and electrical wiring (not shown) extending from the power supply container 3 is passed through the insertion holes 33 </ b> A and 33 </ b> B and introduced into the light source container 2. An annular recess 35 is provided on the back surface 30A of the convex portion 30 over the entire circumference, and an O-ring 36 serving as a sealing member is fitted therein.

  By the way, as shown in FIG. 3, since the convex portion 30 is provided, the bottom portion 13A of the light source container body 10 is formed with a concave portion 43 that is slightly recessed toward the back surface 10A. It is easy to break when an internal explosion occurs. Therefore, as shown in FIG. 5, each of the radiating fins 40 has the other end portion 40 </ b> B connected to the outer peripheral surface 30 </ b> B of the convex portion 30, thereby reinforcing the strength of the convex portion 30. Thereby, the strength reduction by the step part 18 will be reinforced and the explosion-proof performance of the light source container 2 will be improved.

  3 and 4, the power supply container 3 includes a power supply container main body 50 and a power supply lid 51, and a gap δ (see FIG. 5) is formed between the front surface 51A of the power supply container 3 and the rear surface 10A of the light source container 2. 6). ing. The power container body 50 is integrally provided with a bottomed power circuit housing portion 52 that houses the power circuit 9 and a flange 53 that extends in the radial direction (outward direction). The power lid 51 is integrally provided with a housing recess 70 that is recessed corresponding to the power circuit housing 52 and a flange 71 that extends in the radial direction (the direction toward the outside), and the power container body 50 and the flange of the power lid 51. 53 and 71 are plane-joined and fastened with a large number of bolts 54 to constitute a power container 3 having a pressure-proof explosion-proof structure. The flange 71 of the power supply lid 51 is formed with a recess 56 (FIG. 3) over the entire circumference in the joint surface, and an O-ring 57 is fitted into the recess 56 and sealed.

  As shown in FIG. 3, the back surface 52 </ b> B of the power circuit housing portion 52 is configured to be a flat surface, and a through hole 78 for drawing wiring from the power circuit 9 is formed at the approximate center thereof. A fixing portion 58 for fixing the wiring is provided on the back surface 52 </ b> B corresponding to the through hole 78. The fixing portion 58 is a substantially cylindrical member having a communication hole 59 that communicates with the through-hole 78, and a bush 60 pressed by a screw-fastened bush presser 61 is press-fitted into the communication hole 59. The wiring is drawn through the bush 60.

  On the other hand, on the front surface 51A of the power supply lid 51, as shown in FIG. 4, a convex portion 72 having a circular shape in the back front view and a flat front surface 72A is integrally provided. The convex portion 72 constitutes a joint surface that is planarly joined to the convex portion 30 of the light source container 2. A wiring opening 73 is opened at the center of the front surface 72A of the convex portion 72 and communicates with the wiring through hole 31 of the convex portion 30 of the light source container 2, so that the wiring opening 73 and the wiring through hole are communicated. Through 31, electrical wiring (not shown) is routed from the power supply container 3 to the light source container 2.

  As shown in FIGS. 3 and 4, the terminal box 4 includes a bottomed cylindrical terminal box main body 62 and a flange 63. A ground cover (power line lead-out portion) 64 is planarly joined to the back surface 62A of the terminal box main body 62 and is firmly fastened by a large number of bolts 65 (FIG. 5). A support portion 66 that supports the external lead wire 29 is provided in the ground cover 64. The external lead wire 29 penetrates the back surface 62A of the terminal box main body 62 and is drawn out from the terminal box main body 62, and is drawn out through the support portion 66 and the ground cover 64 to the outside. The terminal box 4 is provided on the back surface 52 </ b> B of the power supply container 3 so that the fixing portion 58 is covered with the terminal box main body 62. In the terminal box 4, the end of the external lead wire 29 is the fixing portion 58 of the power supply container 3. Connected to the fixed wiring.

FIG. 6 is a bottom view showing the explosion-proof luminaire 1.
As shown in FIG. 6, the ground cover 64 includes a substantially cylindrical ground cover main body 68 and a connecting portion 69 formed on a side surface 68 </ b> A of the ground cover main body 68. As shown in FIGS. 2 and 6, the connecting portion 69 is provided so as to be inclined downward and obliquely downward D with respect to the rotation axis A of the support arm 80. The connection portion 69 is formed with a connection opening 69A for connecting a pressure-proof explosion-proof flexible fitting 79 (see FIG. 9). In other words, the connection opening 69 </ b> A is also provided below the rotation axis A of the support arm 80 and inclined obliquely downward D. The external lead wire 29 is passed through the flexible fitting 79 and wired outside the explosion-proof luminaire 1 and is connected to the power supply line.

Next, the support arm 80 and its mounting structure will be described.
FIG. 7 is a front view showing the power supply lid 51. FIG. 8 is a perspective view of the explosion-proof luminaire 1 with the fixture body 1A facing upward, and FIG. 9 shows the explosion-proof luminaire 1 with the fixture body 1A facing upward. It is the seen perspective view. FIG. 10 is a perspective view of the explosion-proof luminaire 1 with the fixture body 1A facing down, and FIG. 11 shows the explosion-proof luminaire 1 with the fixture body 1A facing down. It is the seen perspective view.

  The support arm 80 is a support member for fixing the explosion-proof luminaire 1 to the installation surface, and has a function of rotatably supporting the fixture body 1A. Specifically, as shown in FIG. 6, the support arm 80 includes a U-shaped support frame 81 attached so as to sandwich the instrument main body 1 </ b> A. Bolt holes 82A and swing slits 82B are provided on the bottom surface 82 of the U-shaped support frame 81, and the explosion-proof luminaire 1 is firmly fixed by fixing the installation surface through fixing bolts. Is done. The swing slit 82B is an arc-shaped slit centered on the bolt hole 82A, and thereby the irradiation direction can be adjusted by rotating the explosion-proof luminaire 1 along the swing slit 82B. .

  Since the center of gravity of the instrument body 1 </ b> A is located between the light source container 2 and the power supply container 3, the support arm 80 is preferably provided on the light source container 2 or the power supply container 3. Here, although the translucent member 11 is formed in a flat shape for manufacturing reasons, the light extraction amount is smaller than in the case of forming it in a convex shape, and therefore the opening 16 of the light source container body 10 needs to be formed larger. As a result, the diameter of the light source container 2 is larger than that of the power supply container 3. Moreover, since the radiation fin 40 is formed in the back surface 10A of the light source container main body 10, the shape of the light source container main body 10 is complicated. In the power supply container 3, the power supply lid 51 is small and the shape thereof is simple compared to the power supply container main body 50 that houses the power supply circuit 9, so that the design of the mold can be easily changed. Therefore, an attachment portion 83 for attaching the support arm 80 to the power supply lid 51 of the power supply container 3 is provided.

  The attachment portion 83 extends from the left and right sides of the power supply lid 51 to the left and right. More specifically, the edge portion 51B of the power supply lid 51 protrudes from the flange 53 of the power supply container body 50 to the left and right outside. Has been. Thereby, since the attachment part 83 can be provided without changing the joint surface between the power supply container main body 50 and the power supply cover body 51, or the internal volume of the power supply container 3, the change of an explosion-proof structure becomes unnecessary. As shown in FIG. 7, the edge portion 51B of the power cover 51 is connected to the front end 83A and the rear end 83B of the mounting portion 83 while drawing a gentle curve in a front view. Ribs 51 </ b> C that connect the front surface 51 </ b> A and the attachment portion 83 are formed. These curved edge portions 51B and ribs 51C reinforce the strength of the edge portions 51B so that they can withstand the load of the instrument body 1A.

Here, as shown in FIG. 6, the heat radiating fin 40 includes a long fin 42A having the other end portion 40B on the same plane as the back surface 30A, and a short fin 42B short on the front side of the long fin 42A. Yes. At least one long fin 42A is disposed at each of the positions corresponding to the COB type LEDs 8A (FIG. 1) (three in this embodiment), and at least one short fin 42B is provided between the COB type LEDs 8A (this embodiment). Then, one) is arranged. Thus, the heat of the COB type LED 8A is efficiently radiated and temperature unevenness is prevented from occurring in the light source container 2.
The attachment portion 83 is provided at a position corresponding to the short fin 42B, the rear end 83B is on the same plane as the flange 71, and the front end 83A projects forward from the front surface 51A of the power cover 51 and further from the front surface 72A. , Close to the short fin 42B. Thereby, compared with the case where the attachment part 83 is arrange | positioned on the outer side of the short fin 42B, the right and left length of the attachment part 83 can be lengthened, suppressing the protrusion of the right and left of the attachment part 83, and the intensity | strength of the attachment part 83 is improved. be able to. The distance between the left and right fixing surfaces 83C is a sufficient distance to allow the instrument body 1A to rotate.
As shown in FIG. 7, an escape portion 83D is formed at the front end 83A of the attachment portion 83 at a position corresponding to the short fin 42B, and the distance between the attachment portion 83 and the short fin 42B is taken. The heat dissipation of the fins 42B is ensured. The escape portion 83D may be omitted.

Further, the attachment portion 83 is formed with a relatively large thickness in the front-rear direction, and since the length of the attachment portion 83 in the front-rear direction is relatively long, the fixing surface 83C with the support frame 81 can be made large. The support frame 81 can be firmly fixed. Moreover, since the thickness (material) of the power supply cover body 51 increases by providing the attachment part 83, the intensity | strength of the power supply cover body 51 improves.
As shown in FIG. 6, end portions 81 </ b> A of the support frame 81 are pivotally supported by these attachment portions 83, and the power supply container 3 and the support frame 81 are rotatably coupled.

  Further, the support arm 80 includes a stopper mechanism 84 that makes the mounting portion 83 unrotatable in the support frame 81, and the stopper mechanism 84 can hold the power supply container 3 at a predetermined angle with respect to the support frame 81. In addition, the one attachment portion 83 (on the left side in the present embodiment) is provided with a scale 85 indicating a rotation angle around the rotation axis of the support frame 81, and the operator can support the support frame 81 during installation. The angle of the power supply container 3 can be accurately adjusted by using the scale 85. The explosion-proof luminaire 1 of the present embodiment can change the angle of the fixture body 1A from the horizontal state by 45 ° on the upper side (see FIGS. 8 and 9) and 60 ° on the lower side (see FIGS. 10 and 11). It is configured as follows. The upper and lower lengths of the support frame 81 are set to be relatively short in consideration of the moment due to the weight of the instrument main body 1A applied to the support frame 81, and are relatively short to allow the instrument main body 1A to rotate. Yes.

  For example, in a hanging-type explosion-proof lighting fixture suspended from a high place such as a ceiling surface or a wall surface, an external lead wire 29 is taken out to the end (rear end) of the terminal box cap (pipe connecting portion) An opening is provided. In this case, if the instrument body is configured to be rotatable up and down, when the instrument body 1A is turned upward (corresponding to FIGS. 8 and 9), the flexible fitting 79 comes into contact with the installation location. On the other hand, when the instrument body 1A is directed downward (corresponding to FIGS. 10 and 11), there is a problem that the flexible fitting 79 protrudes greatly upward. In the present embodiment, as described above, since the connecting portion 69 of the flexible fitting 79 is formed on the side surface 68A of the ground cover 64, the flexible fitting 79 can be taken out from the side of the terminal box 4, and thus the above-described problem. Can be avoided. Moreover, since the connection portion 69 is provided obliquely downward, it is possible to prevent water such as rain from entering the connection opening 69A of the connection portion 69.

  The other end of the flexible fitting 79 having one end connected to the side surface 68A of the ground cover 64 is connected to the opening 7A of the connection box 5 provided at the installation location, as shown in FIG. The junction box 5 supplies commercial power to the explosion-proof explosion-proof luminaire 1 and includes a plurality of fixed legs 6 that are firmly fixed to the fixed surface with bolts or the like. The casing of the connection box 5 is provided with a plurality of openings 7 </ b> A for drawing the external lead wire 29 through which the commercial power supply line or the flexible fitting 79 is passed. The power supply lines drawn from the respective openings 7A and the external lead lines 29 are connected in the connection box 5, whereby commercial power is supplied to the pressure-proof explosion-proof luminaire 1. The connection box 5 is provided with openings 7A in four directions so that a power supply line can be drawn from an appropriate opening 7A and a feed wiring to another explosion-proof luminaire 1 can be drawn. The unused opening 7A is closed with a plug or the like, for example.

Next, the assembly of the explosion-proof luminaire 1 will be described.
First, after assembling the light source container 2, the power supply container 3 is assembled on the light source container 2. Specifically, the convex portion 72 of the power supply lid 51 of the power supply container 3 is planarly joined to the convex portion 30 of the back surface 10A of the light source container 2, and both are firmly fastened with a large number of bolts 76 (FIG. 4). Assemble. By this planar joining and fastening with bolts 76, a pressure-explosion-proof container-to-container joint structure having a predetermined pressure resistance performance is formed. Then, the power supply circuit 9 is assembled to the power supply container body 50, and the power supply lid 51 is assembled to the light source container 2 and connected. Finally, the power supply container body 50 is put on the power supply lid 51 and firmly fastened with the bolts 54 to constitute the power supply container 3 having a pressure-proof explosion-proof structure.

Next, the terminal box 4 is assembled on the power supply container 3. Specifically, the external lead wire 29 is connected to the fixing portion 58 of the back surface 52B of the power supply container 3, and the flange 63 of the terminal box 4 is attached to the back surface 52B of the power supply container 3 so as to cover the fixing portion 58 with the terminal box body 62. And are firmly joined with a large number of bolts 67. By this planar joining and fastening with bolts 67, a pressure-explosion-proof container-to-container joint structure having a predetermined pressure resistance performance is formed. Then, the ground cover 64 is planarly joined on the terminal box body 62 and fastened with a large number of bolts 65. The ground cover 64 may be fastened before the terminal box 4 is assembled to the power supply container 3.
Through the above operation, each of the light source container 2, the power supply container 3, and the terminal box 4 is connected to assemble the instrument body 1A. By attaching the support arm 80 to the assembled instrument body 1A, the assembly of the pressure-proof explosion-proof lighting instrument 1 is completed.

As described above, in the explosion-proof luminaire 1 of the present embodiment, the pressure-proof explosion-proof containers of the light source container 2, the power supply container 3, and the terminal box 4 are joined to each other in a plane and fastened with a large number of bolts. Constructs a pressure-explosion-proof structure between the containers.
Conventionally, when a plurality of containers included in a lighting fixture are provided, a screwing structure (screw fitting) is generally used as a joining structure of these containers. However, in the screwed structure, if the thread grooves are not machined with high accuracy in each container, the pressure resistance as designed cannot be obtained, so that machining is difficult, and much labor is required for screwing the containers together during assembly. There is a problem.
In the present embodiment, the assembly is very simple as compared to the conventional joining structure in which the containers are joined by screw fitting by the flat joining and the fastening with a plurality of bolts. In addition, the design, processing, and assembly of each container are facilitated, and the productivity of the lamp is greatly enhanced.

Further, in the flat joint structure, the explosion-proof performance can be adjusted by the distance of the joint portion. Therefore, by designing the distance between the light source container 2 and the convex portions 30 and 72 of the power supply container 3 and the distance of the flange 63 of the terminal box 4 according to the desired explosion-proof performance, these light source container 2 and power supply container 3 and a desired explosion-proof performance can be obtained in the connecting structure between the terminal box 4.
As a result, a joining structure that is easier to design and process than conventional screw fitting, which requires high-precision design and processing of the thread groove, and the productivity of the lamp is increased.

Explaining the explosion-proof performance and the distance between the joints, the explosion test generally includes an explosion flammability test in addition to an explosion strength test, which is a strength confirmation test against an internal explosion. The explosion flammability test is a safety confirmation test against flame escape.
For example, in a recommended standard called an explosion-proof guideline, in order to prevent flame escape, the minimum distance that the joint portion should secure is determined according to the internal volume of the container and the gas grade. That is, the flame that has ignited in the container passes through the joint surface of the joint, is finally cooled, and only the nonflammable gas is discharged to the outside. At this time, if the distance through which the flame passes through the joint is insufficient, the flame is not completely cooled and is ignited by external gas.

Therefore, in the explosion-proof luminaire 1, between the light source container 2 and the power supply container 3, the openings (wiring through-hole 31, wiring opening 73) in the joint surface of the convex portions 30 and 72 are exposed to the outside. The desired explosion-proof flammability is ensured by adjusting the distance to reach.
Moreover, between the power supply container 3 and the terminal box 4, desired explosion-proof flammability is ensured by adjusting the width | variety (distance extended in radial direction) of the flange 63 which is a joint surface of both.
Note that the shape of the light source container 2, the power supply container 3, and the terminal box 4, the number of bolts as fastening metal fittings, and the pitch at which the bolts are tightened are also related to explosion-proof flammability performance and explosion-proof strength performance. In consideration of this, the distance between the joints is determined.

  As described above, according to the present embodiment, the explosion-proof light source container 2 containing the COB-type LED 8A and the explosion-proof structure containing the power supply circuit 9 of the COB-type LED 8A are provided on the back surface 10A of the light source container 2. The power supply container 3 is provided, and the power supply container 3 is provided with a support arm 80 that rotatably supports the power supply container 3. With this configuration, since the irradiation direction can be changed by rotating the instrument body 1A, illumination can be performed in various directions.

  According to the present embodiment, since the power supply container 3 is planarly bonded to the back surface 10A of the light source container 2 and fastened with a plurality of bolts 76, it is easier to manufacture and assemble than the conventional screw fitting structure, Productivity is increased.

  In addition, according to the present embodiment, the power supply container 3 is planarly bonded to the power supply container body 50 integrally having the flange 53 and the flange 53 of the power supply container body 50 to be closed, and is disposed facing the light source container 2. The power cover 51 is provided, and the edge portion 51B of the power cover 51 is protruded from the flange 53 to form the mounting portion 83 of the support arm 80. With this configuration, the mounting portion 83 can be formed while maintaining the explosion-proof structure, and the re-design of the explosion-proof structure surface is not required. Therefore, the existing suspended explosion-proof explosion-proof lighting fixture can be supported by a minimum design change. It can be easily changed to the arm-type explosion-proof luminaire 1 supported at 80.

  Further, according to the present embodiment, even when the gap δ is provided between the back surface 10A of the light source container 2 and the power source container 3 and the plurality of heat radiation fins 40 are provided on the back surface 10A of the light source container 2, the power source By providing the support arm 80 on the container 3, the attachment portion 83 can be formed while maintaining the cooling structure. Therefore, since the cooling structure does not need to be redesigned, the existing explosion-proof lighting fixture can be easily changed to the arm-type explosion-proof lighting fixture 1 with a minimum design change. In addition, by changing the design of the power supply container 3 that is relatively smaller than the light source container 2, the cost required for the design change (for example, the cost required for changing the mold) can be minimized.

  According to the present embodiment, the terminal box 4 for connecting the power supply circuit 9 and the external lead wire 29 is provided on the back side of the power supply container 3, and the external lead wire 29 is provided on the back side of the terminal box 4. A ground cover 64 is provided, and a connection opening 69A, which is a lead opening of the external lead wire 29, is provided on the side surface 68A of the ground cover 64. With this configuration, since the flexible fitting 79 (external lead wire 29) extends from the side of the instrument body 1A, the flexible fitting 79 (external lead wire 29) can be easily routed.

  Further, according to the present embodiment, the external lead wire 29 is covered with the flexible fitting 79, and the connection opening 69 </ b> A for connecting the flexible fitting 79 is provided below the rotation axis A of the support arm 80. . With this configuration, the upward extension of the flexible fitting 79 can be suppressed. Further, by directing the connection opening 69A downward, it is possible to more reliably suppress the upward extension of the flexible fitting 79, and it is possible to prevent the entry of water such as rain into the connection opening 69A.

  The above-described embodiments are merely illustrative of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

In the embodiment described above, the support arm 80 is provided on the power supply lid 51, but may be provided on the power supply container body 50.
In the above-described embodiment, the connecting portion 69 is provided so as to be inclined obliquely downward. However, the present invention is not limited to this.

  In the above-described embodiment, each of the light source container 2, the power supply container 3, and the terminal box 4 is configured to have the explosion-proof container by planar joining and bolt fastening. The container which has can be used.

  Moreover, in embodiment mentioned above, although COB type LED8A was illustrated as an example of a light emitting element, not only this but arbitrary light emitting elements can be used for a light source. Moreover, although the bolts 67 and 76 were illustrated as a fastening metal fitting which fastens a plane joining location, arbitrary fastening metal fittings can be used as long as desired explosion-proof performance is obtained.

  Moreover, this invention is applicable not only to a flame-proof type lighting fixture but various explosion-proof type lighting fixtures.

1 Explosion-proof lighting equipment (explosion-proof lighting equipment)
2 Light source container 3 Power supply container 4 Terminal box 8A COB type LED (light emitting element)
9 Power supply circuit 10A Rear side 29 External lead wire (power supply line)
40 Radiation fin 50 Power supply container body 51 Power supply lid 51B Edge 53 Flange 54 Bolt (fastening metal fitting)
64 Ground cover (power line lead-out part)
68A Side surface 69 Connection portion 69A Connection opening 79 Flexible fitting 80 Support arm 83 Mounting portion A Rotating shaft δ Gap

Claims (3)

In a lighting fixture provided with a light emitting element and a power supply circuit for generating lighting power of the light emitting element in the fixture body,
The instrument body is provided between a light source container that houses the light emitting element, a power container body that is provided on the back side of the light source container and houses the power circuit, and is provided between the light source container and the power container body. A substantially flat member for connecting the light source container and the power supply container body;
A support arm that rotatably supports the power supply container body is attached to attachment portions provided at both left and right ends of the member,
The center of gravity of the instrument body is located between the light source container and the member,
The lighting fixture characterized in that a pivot shaft of the support arm extends to the left and right between the light emitting element and the power supply circuit. In a lighting fixture provided with a light emitting element and a power supply circuit for generating lighting power of the light emitting element in the fixture body,
The instrument body includes a light source container that houses the light emitting element, a power container body that is separated from the light source container and houses the power supply circuit, the light source container on the front surface, and the power container body on the back surface. A flat member,
A support arm that rotatably supports the power supply container body is attached to attachment portions provided at both left and right ends of the member,
The member also serves as a power lid of the power container body,
The center of gravity of the instrument body is located between the light source container and the member,
The lighting fixture characterized in that a pivot shaft of the support arm extends to the left and right between the light emitting element and the power supply circuit. A front end of the mounting portion, the lighting device according to any of claims 1 or 2, characterized in that protrudes forward from the front surface of the member.

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