JP6281322B2 - Explosion-proof lighting equipment - Google Patents

Description

  The present invention relates to an explosion-proof lighting fixture having an explosion-proof cylinder portion.

  2. Description of the Related Art Conventionally, an explosion-proof illumination device in which a light source is built in a cylinder and both ends of the cylinder are supported by a cylinder holder is known (for example, see Patent Document 1). In this type of explosion-proof lighting device, in order to ensure the explosion-proof performance between the cylinder and the cylinder holder, a sticking agent is poured between the cylinder holder and the outer peripheral surface of the cylinder portion to cure the sticking agent, Explosion-proof performance is provided between the holder and the outer peripheral surface of the cylinder portion.

JP 2007-227305 A

However, in the above-described conventional configuration, it takes time to cure the sticking agent itself, and in order to prevent the sticking agent from flowing down, it is necessary to stand the cylinder on the cylinder holder and harden the sticking agent. Explosion-proof performance must be provided one by one, and work takes time. In addition, when a moisture-curing type adhesive that cures by reacting with moisture in the air is used as the fixing agent, moisture is required for the fixing of the fixing agent, especially in the winter season when it is dried. It becomes complicated.
This invention is made | formed in view of the situation mentioned above, and it aims at providing the explosion-proof type lighting fixture which can implement | achieve the explosion-proof structure of a cylinder part easily.

In order to achieve the above-described object, the present invention provides an explosion-proof lighting apparatus in which a light source is housed in a cylinder and both ends of the cylinder are closed with a cylinder holder, the cylinder holder being an opening having a stepped hole. The cylinder is fitted in the opening, and an explosion-proof packing for securing explosion-proof performance is disposed between the side surface of the cylinder and the cylinder holder, and is fixed to the cylinder holder, A compression member for compressing the explosion-proof packing against the cylinder holder is provided , and a positioning packing for positioning the end face of the cylinder is provided between the end face of the cylinder and the cylinder holder. A bottom portion interposed between an end surface of the cylinder and a stepped portion of the opening of the cylinder holder; and A side portion extending between the outer circumferential surface of the cylinder and the inner wall of the opening, and extending in the axial direction of the cylinder, contacting the explosion-proof packing, and the explosion-proof packing and the positioning packing. The total length is set to be longer than the length from the opening edge to the step portion of the opening, and the explosion-proof packing is attached to the cylinder holder with the compression member screwed into the cylinder holder. It is characterized by being compressed in the axial direction .

In the configuration of the above mentioned, the compression member side of the packing for the explosion-proof performance, may be provided to suppress packing suppress packing for the explosion-proof performance.
In the above-described configuration, a light shielding member for shielding light from entering the explosion-proof packing may be provided on a side surface of the cylinder.

  According to the present invention, since the explosion-proof packing for securing the explosion-proof performance is disposed between the side surface of the cylinder and the cylinder holder, and the compression member for compressing the explosion-proof packing against the cylinder holder is provided, the cylinder portion The explosion-proof structure can be easily realized.

It is a figure which shows the flameproof explosion-proof type lighting fixture which concerns on embodiment of this invention, (A) is a top view, (B) is a front view, (C) is a bottom view, (D) is a side view. It is a perspective view which shows the explosion-proof type lighting fixture which removed the protective cover from upper direction. It is a perspective view which shows the explosion-proof type lighting fixture which removed the protective cover from the downward direction. It is a longitudinal cross-sectional view which shows a pressure-proof explosion-proof lighting fixture. It is a figure which shows the one end side of the explosion proof type lighting fixture which removed the protective cover, (A) is a top view, (B) is AA sectional drawing of (A). It is a disassembled perspective view which shows the cylinder holder of one end side. It is a disassembled perspective view which shows the cylinder holder of the other end side. It is a perspective view which shows the light source unit of the state pulled out from the cylinder part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, a flameproof explosion-proof lighting fixture will be described as an example of an explosion-proof lighting fixture.
FIG. 1 is a view showing a pressure-proof explosion-proof lighting device according to this embodiment, FIG. 1 (A) is a plan view, FIG. 1 (B) is a front view, FIG. 1 (C) is a bottom view, and FIG. ) Is a side view. 2 is a perspective view showing the explosion-proof luminaire with the protective cover removed from above, and FIG. 3 is a perspective view showing the explosion-proof luminaire with the protective cover removed from below.
As shown in FIGS. 1 to 3, the pressure-proof explosion-proof lighting device 1 includes a device 10, and the device 10 is supported on an installation surface S such as a ceiling surface via a pair of hanging tools 2 and 3. Yes.

  The instrument 10 is configured by supporting the cylinder portion 20 on the lower surface of the reflecting plate 12 and providing a protective cover 13 on the upper surface of the reflecting plate 12. The cylinder part 20 is a cylindrical case that houses the light source unit 30 (FIG. 4), and two cylinder parts are provided in this embodiment. The reflection plate 12 is a long plate-like member, and a cylinder portion 20 is provided inside the reflection plate 12 along the longitudinal direction of the reflection plate 12. A terminal box 40 is disposed on the upper surface of the reflecting plate 12, and the terminal box 40 is accommodated in the protective cover 13. The cable 4 (FIG. 5) is connected to the terminal box 40, and the cable 4 from the terminal box 40 passes through the one hanging tool 3 and is exposed from the upper end of the one hanging tool 3. The protective cover 13 is a cover that protects the cable 4 and the terminal box 40. The protective cover 13 extends above the reflecting plate 12 in the longitudinal direction of the reflecting plate 12, and impacts on the cable 4 and the terminal box 40 due to falling objects or the like. To prevent. An external ground 14 is provided on one side wall of the protective cover 13. The position of the external ground 14 is not limited to the protective cover 13.

  The pair of suspending tools 2 and 3 are hollow pipes that are connected to the upper surface of the protective cover 13 while being spaced apart from each other. More specifically, two fixing tools 15 for screwing the suspending tools 2 and 3 are attached to the upper surface of the protective cover 13 so as to be spaced apart from each other. Is fixed to the protective cover 13 by being screwed to the fixture 15. The upper end of one hanging tool 3 is fixed to the installation surface S using a connection box 16, and the upper end of the other hanging tool 2 is fixed to the installation surface S using a hanging metal fitting 17. On the installation surface S, a conduit (not shown) through which a power line such as a commercial power supply is passed is fixed, and the suspension fitting 17 is fixed on the installation surface S so as to straddle the conduit. The cable 4 is connected to a power line of a commercial power source in a connection box 16.

  FIG. 4 is a longitudinal sectional view showing the explosion-proof luminaire 1. FIG. 5 is a view showing one end side of the explosion-proof luminaire 1 with the protective cover 13 removed, FIG. 5 (A) is a plan view, and FIG. 5 (B) is an AA cross section of FIG. 5 (A). FIG. 6 is an exploded perspective view showing the cylinder holder 6 on one end side, and FIG. 7 is an exploded perspective view showing the cylinder holder 7 on the other end side. FIG. 8 is a perspective view showing the light source unit 30 in a state of being pulled out from the cylinder portion 20. In FIG. 4, the central portion of the explosion-proof luminaire 1 is omitted.

As shown in FIG. 4, the cylinder portion 20 includes a cylindrical cylinder 21 and cylinder holders 6 and 7 provided at both ends of the cylinder 21. The cylinder 21 is formed of a material having strength and light transmittance, such as hard glass. The cylinder 21 is supported by the reflecting plate 12 by fixing both ends to the cylinder holders 6 and 7.
A rod-shaped light source unit 30 is accommodated in the cylinder portion 20. The light source unit 30 is a straight tube lamp in which a light emitting element unit (light source) 31 and a power source 32 are built in a cylindrical tube 33, and has plugs 34 and 35 at both ends of the tube 33.

  The light emitting element unit 31 is configured by arranging a plurality of LEDs (light emitting elements) 31B on the surface of the base 31A having excellent thermal conductivity, and the back surface of the base 31A is fixed to a fixing plate 36 attached to the plugs 34 and 35. As a result, the tube 33 is supported. The fixed plate 36 is made of a material having excellent thermal conductivity.

The power source 32 is disposed at both ends of the tube 33. In the present embodiment, the power source 32 is disposed on the back side of the base 31 </ b> A and supported by the fixed plate 36.
Each plug 34, 35 is provided with two pins 34 A, 35 A, and a power supply 32 is electrically connected to the pin 34 A of the plug 34 located on one end side of the tube 33. That is, the light source unit 30 is configured as a one-sided power supply type, the pin 35A of the plug 35 on the other end side of the tube 33 is not used for electrical connection, and the plug 35 supports the other end of the light source unit 30. It functions as a supporting member.

  The cylinder holders 6 and 7 are provided with a cylinder holder body 50 made of a material excellent in thermal conductivity and impact resistance, which is fixed to the reflection plate 12 via screws 22. One opening 51A connected to the hollow portion 51 of the cylinder holder body 50 is closed by screwing the lid member 52, and the cylinder 21 is fitted in the other opening 51B. The opening 51B is a stepped hole having a step portion 51B1 on the hollow portion 51 side.

Conventionally, in order to ensure the explosion-proof performance between the cylinder and the cylinder holder, the fixing agent is poured between the cylinder holder and the outer peripheral surface of the cylinder part, and the fixing agent is cured, so that the cylinder holder and the outer peripheral surface of the cylinder part are Explosion-proof performance was provided during the period.
However, the sticking agent takes time to cure itself, and in order to prevent the sticking agent from flowing down, it is necessary to stand the cylinder on the cylinder holder and harden the sticking agent. In fact, it takes time to work. In addition, when a moisture-curing type adhesive that cures by reacting with moisture in the air is used as the fixing agent, moisture is required for the fixing of the fixing agent, especially in the winter season when it is dried. It becomes complicated.

Therefore, in the present embodiment, as shown in FIGS. 4 to 6, the cylinder 21 is fitted into the other opening 51 </ b> B via the annular packings 54 and 53.
The packing 53 is an explosion-proof packing that is provided between the outer peripheral surface of the cylinder 21 and the inner wall of the opening 51B to ensure explosion-proof performance. For example, the packing 53 is formed of a stretchable material such as rubber.

  The packing 54 is a positioning packing that positions the end face of the cylinder 21 in the axial direction of the cylinder 21. The positioning packing 54 includes a bottom 54A interposed between the end surface of the cylinder 21 and the stepped portion 51B1 of the opening 51B, and an outer peripheral surface (side surface) of the cylinder 21 and an inner wall of the opening 51B in contact with the packing 53. A side portion 54B interposed therebetween is provided. Thus, in this embodiment, the positioning packing 54 for positioning the end surface of the cylinder 21 is provided between the end surface of the cylinder 21 and the cylinder holders 6 and 7. With this configuration, it is possible to prevent the end surface of the cylinder 21 from biting into the positioning packing 54 by configuring the positioning packing 54 with a material having relatively high hardness. The explosion-proof packing 53 and the positioning packing 54 may be integrated.

The cylinder holder main body 50 includes a compression member 55 that closes the opening 51 </ b> B and compresses the explosion-proof packing 53 against the cylinder holder main body 50. The total length of the packings 54 and 53 is set longer than the length of the opening 51B (the length from the opening edge to the stepped portion 51B1). By screwing the compression member 55 into the cylinder holder body 50, the explosion-proof packing 53 is compressed in the axial direction with respect to the cylinder holder body 50 and expands in the radial direction of the cylinder 21. As a result, the explosion-proof performance packing 53 and the inner wall of the opening 51 </ b> B and the explosion-proof performance packing 53 and the outer peripheral surface of the cylinder 21 are in close contact with each other. As described above, in this embodiment, the explosion-proof packing 53 is disposed between the side surface of the cylinder 21 and the cylinder holders 6 and 7, and the compression for compressing the explosion-proof packing 53 with respect to the cylinder holders 6 and 7 is performed. The member 55 is provided. With this configuration, the explosion-proof packing 53 can be provided without using a sticking agent that takes time and labor for curing, so the explosion-proof structure of the cylinder portion 20 can be easily realized.
The compression member 55 also functions as a pressure-resistant member that holds the pressure transmitted to the explosion-proof packing 53. The compression member 55 is made of a material having excellent heat conductivity, and the compression member 55 and the cylinder holders 6 and 7 are heat radiators because of excellent heat conductivity. The compression member 55 may be fixed to the cylinder holder main body 50 by fixing means such as screws.

  The explosion-proof packing 53 needs to prevent deterioration from light. Therefore, in this embodiment, the light shielding member 56 is provided on the outer peripheral surface of the cylinder 21, and the light shielding member 56 prevents the explosion-proof packing 53 from being deteriorated by light. The light shielding member 56 is made of a light shielding material such as a light shielding tape wound around the outer peripheral surface of the cylinder 21 or a light shielding paint applied to the outer peripheral surface of the cylinder 21.

  Further, a joint sheet 57 is disposed between the compression member 55 and the explosion-proof packing 53. The joint sheet 57 is a suppressing packing that suppresses the explosion-proof packing 53, and has an inner diameter substantially equal to the outer diameter of the cylinder 21 and an outer diameter that is greater than or equal to the outer diameter of the explosion-proof packing 53. The joint sheet 57 can prevent the pressure outside the cylinder part 20 from being directly transmitted from the compression member 55 to the explosion-proof packing 53 and can suppress the explosion-proof packing 53 against the pressure inside the cylinder 20. . The joint sheet 57 is made of a light shielding material, and the joint sheet 57 can also prevent deterioration of the explosion-proof packing 53 due to light. The joint sheet 57 prevents friction of the explosion-proof packing 53 due to the rotation of the compression member 55. In FIG. 7, the compression member 55 and the joint sheet 57 are omitted.

  In the hollow portion 51, sockets 58 and 59 having protrusions 58A and 59A on one end surface are arranged. When the projection 52A of the lid member 52 is brought into contact with the ends of the projections 58A and 59A and the lid member 52 is screwed into the one opening 51A of the cylinder holder body 50, the plugs 34 and 35 are inserted. It is clamped between the sockets 58 and 59.

  Further, the light source unit 30 is configured to be a one-side power feeding type that is fed from one end side, and is configured to be removable from the cylinder holder 7 on the other end side that is the non-power feeding side, as shown in FIG. During maintenance of the light source unit 30, the lid member 52 of the cylinder holder 7 is removed and the light source unit 30 is pulled out.

The sockets 58 and 59 include pin connection portions 58B and 59B to which the pins 34A and 35A (FIG. 4) of the plug 34 are connected as shown in FIGS. The pin connection portion 59B of the socket 59 disposed in the cylinder holder 7 on the other end side that is the open / close side is formed in a round hole shape into which the pin 34A of the plug 34 is inserted and clamped.
In the one-side drawer structure, as the length of the light source unit becomes longer due to assembly errors, dimensional errors of parts, etc., the pin connection of the socket placed on the cylinder holder on the one end side that becomes the closing side of the plug on the insertion side It becomes difficult to connect to the part. Therefore, conventionally, in order to easily connect the pin connection portion of the socket and the pin of the plug, the pin connection portion of the socket on the closing side is formed in a flat plate shape having an urging means. However, in this configuration, since the tip of the pin contacts the flat pin connection portion at one point, there is a possibility that contact failure may occur.

  Therefore, the pin connection portion 58B of the closing side socket 58 is formed in a hole shape for inserting and pinching the pin 35A, like the pin connection portion 59B of the opening / closing side socket 59. Thereby, since the pin 34A of the light source unit 30 can be reliably brought into contact with the pin connection portion 58B of the socket 58, contact failure of the pin 34A can be prevented. In addition, since the hole shape of the pin connection portion 58B is formed as a long hole, the positional deviation of the pin 34A due to the length of the light source unit 30 is allowed, and the pin 34A can be reliably inserted into the pin connection portion 58B. A guide groove 58C for guiding the pin 34A is formed around the pin connection portion 58B. Similarly, a guide groove 59C that guides the pin 35A is formed around the pin connection portion 59B.

  Further, an annular lamp support 37 is provided on the light source unit 30 side of the socket 58 as shown in FIG. The inner diameter of the lamp support 37 is formed substantially the same as the outer diameter of the plug 34, and the lamp support 37 functions as a guide for positioning the light source unit 30 in the radial direction of the cylinder 21. With the lamp support 37, the plug 34 can be easily and accurately positioned in the radial direction of the cylinder 21 when the light source unit 30 is mounted in the cylinder 21. As a result, electrical contact between the pin 34A of the light source unit 30 and the pin connection portion 58B of the socket 58 can be ensured.

As shown in FIGS. 6 and 7, the cylinder holder 6 is formed with a through hole 61 that exposes the hollow portion 51 on the mounting surface of the cylinder holders 6 and 7 with the reflection plate 12. In this embodiment, in order to make the cylinder holders 6 and 7 common, the cylinder holder 7 is also formed with a through hole 61, but the through hole 61 is closed.
A cable (wiring) 8 electrically connected to the pin 34 </ b> A is connected to the socket 58, and the cable 8 is drawn out of the cylinder holder 6 from the through hole 61 of the cylinder holder 6.

  In the conventional configuration, the wiring portion for guiding the wiring from the power source is arranged in the cylinder holder, the wiring extending from the light source and the wiring extending from the wiring portion are connected outside the cylinder holder, and the connected wiring is placed in the cylinder holder. Was housed. However, in this configuration, in order to connect the wiring of the light source and the wiring of the wiring section outside the cylinder holder, it is necessary to lengthen these wirings, and the work of housing the wiring in the cylinder holder is complicated. there were.

  Therefore, a cable gland 60 for holding the cable 8 is built in the cylinder holder 6. The cable gland 60 includes the above-described through hole 61, and a gland packing 62, a packing land 63, and a washer 64 disposed in the through hole 61. As shown in FIG. 6, the through hole 61 is a stepped hole having a step portion 61A on the hollow portion 51 side, and the end surface of the gland packing 62 abuts on the step portion 61A. The gland packing 62 is a cylindrical member formed of a stretchable material such as rubber, and the cable 8 is passed through the inner surface. The packing land 63 is a cylindrical member having a flange 63A. The washer 64 is disposed between the gland packing 62 and the packing land 63.

The total length of the gland packing 62, the packing land 63, and the washer 64 is set to be longer than the length of the through hole 61. The packing land 63 and the through hole 61 are formed with threaded portions, and the gland packing 62 is pushed and compressed by the packing land 63 by compressing the packing land 63 into the through hole 61 in the radial direction of the through hole 61. Inflates. Thereby, between the gland packing 62 and the through-hole 61 and between the gland packing 62 and the cable 8 are brought into close contact, and the cable 8 is held. Between the cylinder holder 6 and the reflecting plate 12, a packing 23 surrounding the through hole 61 is disposed.
As described above, since the cable gland 60 for guiding the cable 8 of the socket 58 to the outside is provided in the cylinder holder 6, the cable 8 can be easily connected to the cable 4 outside the cylinder holder 6. Further, unlike the conventional configuration, it is not necessary to provide a wiring portion for guiding wiring from the power source in the cylinder holder, and it is not necessary to accommodate the wiring of the light source and the wiring portion in the cylinder holder. Can be simplified.

  With respect to the through hole 61, the explosion-proof performance of the cylinder holder 6 is ensured by the length of the gland packing 62. Further, the explosion-proof performance of the cylinder holders 6 and 7 is ensured by the screw depth of the lid member 52 for the opening 51A and the screw depth of the compression member 55 and the length of the packing 53 for explosion-proof performance for the opening 51B. Thereby, the cylinder part 20 is comprised by the explosion-proof structure. Since the light emitting element unit 31 and the power source 32 of the light emitting element unit 31 are housed in the cylinder part 20 having the explosion-proof structure in this way, the cylinder part 20 may be made to have an explosion-proof structure. It can be simplified.

  A terminal box 40 is fixed to the reflector 12 above the cylinder holder 6. An introduction hole 41 that guides the cable 8 extending from the cable gland 60 is formed on the bottom surface of the terminal box 40. A packing 42 surrounding the introduction hole 41 is arranged between the terminal box 40 and the reflection plate 12. As described above, since the terminal box 40 is connected to the cylinder holder 6, a member for protecting the cable 8 extending from the cylinder holder 6 is not required, so that the number of parts can be reduced. In addition, since the light source unit 30 is a single-side power feeding type, the configuration of the cylinder part 20 can be simplified, and the terminal box 40 and the cable gland 60 need not be provided on both sides of the cylinder part 20, so that the number of parts can be reduced.

  A connection portion 43 for connecting a cable ground 70 is provided on the side surface of the terminal box 40, and the cable ground 70 is connected to the connection portion 43 via an O-ring 44. The cable gland 70 is a pressure-resistant packing type cable including a main body 71 fitted into the connecting portion 43, a packing 72 disposed in the main body 71, and a gland 73 fitted into the main body 71 to compress the packing 72. The ground. The cable 4 is held by the cable gland 70, led into the terminal box 40 through the connection portion 43, and connected to the cable 8 extending from the cylinder holder 6 in the terminal box 40. The terminal box 40 has a safety explosion-proof structure. In the present embodiment, two connection portions 43 and two cable glands 70 are provided, but one connection portion 43 and one cable gland 70 may be provided.

  As described above, according to the present embodiment, the explosion-proof packing 53 is disposed between the side surface of the cylinder 21 and the cylinder holders 6 and 7, and the explosion-proof packing 53 is attached to the cylinder holders 6 and 7. And a compression member 55 for compressing. With this configuration, the explosion-proof packing 53 can be provided without using a sticking agent that takes time and labor for curing, so the explosion-proof structure of the cylinder portion 20 can be easily realized.

  Further, according to the present embodiment, the positioning packing 54 for positioning the end surface of the cylinder 21 is provided between the end surface of the cylinder 21 and the cylinder holders 6 and 7. With this configuration, it is possible to prevent the end surface of the cylinder 21 from biting into the positioning packing 54 by configuring the positioning packing 54 with a material having relatively high hardness.

  Further, according to the present embodiment, the joint sheet 57 for holding the positioning packing 54 is provided on the compression member 55 side of the positioning packing 54. The joint sheet 57 can prevent the pressure outside the cylinder part 20 from being directly transmitted from the compression member 55 to the explosion-proof packing 53 and can suppress the explosion-proof packing 53 against the pressure inside the cylinder 20. .

  Further, according to the present embodiment, since the light shielding member 56 that shields the light incident on the explosion-proof packing 53 is provided on the side surface of the cylinder 21, the light-proof deterioration of the explosion-proof packing 53 by the light shielding member 56. Can be prevented.

However, the above-described embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
For example, in the above-described embodiment, two light source units 30 are provided, but the number of light source units 30 is not limited to this, and may be one, or three or more.
In the above-described embodiment, the light source is a light emitting element. However, the light source is not limited to the light emitting element, and may be a lamp such as a fluorescent lamp.

In the above-described embodiment, the light source is configured as the power source built-in light source unit 30 including the power source 32. However, the light source and the power source 32 may be provided separately.
In the above-described embodiment, the power source 32 is provided in the cylinder 21, but the power source 32 may be provided in the cylinder holder 6.

In the above-described embodiment, the light source unit 30 is a single-sided power supply type, but may be a double-sided power supply type. In this case, the terminal box 40 may be disposed also on the cylinder holder 7 side. Further, the terminal box 40 may not be close to the cylinder holders 6 and 7.
In the above-described embodiment, the cable gland 70 is connected to the terminal box 40, but the cable gland 70 may be integrated with the terminal box 40.

  In the above-described embodiment, the explosion-proof explosion-proof luminaire 1 is fixed to the installation surface S such as the ceiling surface by the pipe-shaped hanging tools 2 and 3, but the configuration of the hanging tools 2 and 3 is the same. It is not limited to. For example, the explosion-proof luminaire 1 may be configured to be fixed to the installation surface S by a fixture such as a stand or a bracket.

  In the above-described embodiment, the explosion-proof illuminating device used in a special environment has been described. However, the present invention can be applied to a safety-explosion-proof illuminating device or a sealed illuminating device. Here, the explosion-proof illuminating device includes a pressure-proof explosion-proof type, a safety explosion-proof type or a sealed type lighting fixture used in a special environment.

1 Explosion-proof lighting fixtures 6, 7 Cylinder holder 21 Cylinder 31 Light emitting element unit (light source)
53 Explosion-proof packing 54 Positioning packing 55 Compression member 56 Light shielding member 57 Joint sheet (pressing packing)

Claims (3)

In an explosion-proof lighting fixture in which a light source is housed in a cylinder and both ends of the cylinder are closed with a cylinder holder,
The cylinder holder includes an opening that is a stepped hole having a step, and the cylinder is fitted into the opening.
While arranging an explosion-proof packing between the side surface of the cylinder and the cylinder holder to ensure explosion-proof performance,
A compression member fixed to the cylinder holder and compressing the explosion-proof packing against the cylinder holder ;
Between the end face of the cylinder and the cylinder holder, a positioning packing for positioning the end face of the cylinder is provided,
The positioning packing includes a bottom portion interposed between an end surface of the cylinder and a step portion of the opening of the cylinder holder, and extends in the axial direction of the cylinder from the bottom portion, and contacts the explosion-proof packing. A side portion interposed between the outer peripheral surface of the cylinder and the inner wall of the opening,
The total length of the explosion-proof packing and the positioning packing is set to be longer than the length from the opening edge of the opening to the stepped portion, and the compression member is screwed into the cylinder holder. An explosion- proof lighting apparatus, wherein an explosion-proof packing is compressed in the axial direction with respect to the cylinder holder . The explosion-proof to the compression member side performance for packing, explosion-proof luminaire according to claim 1, characterized in that a suppressed packing suppress packing for the explosion-proof performance. The explosion-proof illuminating device according to claim 1 or 2 , wherein a light shielding member that shields light from entering the explosion-proof packing is provided on a side surface of the cylinder.

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