JPS6118571Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an explosion-proof lighting fixture used in a dust-free room in a gas/vapor hazardous area.

<Problem to be solved by the invention> Lighting equipment used in gas vapor hazardous areas must have one of the explosion-proof structures specified by JIS to prevent it from becoming a source of explosion.

The airtight structure of conventional explosion-proof lighting equipment is
It is constructed to keep everything inside the container that houses the lamp, ballast, etc. airtight, and the front of the lighting equipment is translucent to prevent the airtightness from being compromised by objects flying in from the outside. To prevent damage to the board, a guard or transparent protective panel was installed in front of it. These guards or protective panels are attached to the front translucent plate and its frame, which contribute to the airtightness of the lighting equipment, and are removed as a whole when replacing the lamp. Therefore, it is very heavy, and when reinstalling it, the work must be done with sufficient care so as not to impair the airtight performance before removal, which poses the problem of requiring skilled skills. Ta.

Therefore, an object of the present invention is to provide an explosion-proof lighting fixture that has a simple structure, is lightweight, and allows lamps to be easily replaced even by non-skilled technicians without impairing the explosion-proof properties of the lamp socket. It is.

<Means for solving the problem> The explosion-proof lighting fixture of the present invention has a structure in which the outer periphery of the lamp is covered with a translucent lamp protection cover, and the lamp can be attached and removed in the axial direction at the end of the lamp protection cover. A lamp socket is provided, and a lamp device comprising the lamp, the lamp protection cover, and the lamp sockets at both ends thereof has an airtight structure, and one end of the lamp device is provided with a hinge, and the other end is rotatably supported so that it can be lowered. , the lamp device, the reflector, and the ballast are housed in a container having a flange portion formed around the bottom opening for attachment to construction materials, and the bottom opening is closed with a removable container protection cover; It is characterized by a packing being interposed between the frame of the container protective cover and the construction material or the flange portion and the construction material.

Further, one side of the container protection cover frame and the flange portion of the container can be connected by a chain.

<Function> Since the lamp device consisting of the lamp, lamp protection cover, and lamp socket has a small volume, it is easy to make this part explosion-proof, and when replacing the lamp, the lamp can be taken out by simply removing the end cap. Simply tightening the cap restores the original explosion-proof structure.

The space around the lamp device formed by the container and the container protective cover only needs to have a closed structure to prevent dust, dust, etc. from entering.

When replacing the lamp, remove the container protective cover, lower the other end of the lamp unit, tilt it, and restore the lamp to its original state by performing the reverse operation, making lamp replacement easy. . At that time, if the frame of the container protection cover is connected with a chain, the removed container protection cover can be suspended from the chain, so even in places where lighting equipment is installed at a high place, the container protection cover can be extended above the floor. This saves you the trouble of lowering it and lifting it up again.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a side partial cross-sectional view of an embodiment of the present invention, FIG. 2 shows a cross-sectional view thereof, and FIGS. 3 and 4 show detailed views of the parts shown in FIG. 2.

The directly operated fluorescent lamps 1, 1 are protected by circumferential lamp protection covers 2, 2 made of Pyrex glass, and the space between the lamp sockets 3, 3 and the lamp protection covers 2, 2 is airtight and safe. It satisfies the increased explosion-proof structure.

To explain this airtight structure in detail, as shown in FIG. 1, the electrode terminal 20 of the lamp 1 is arranged around the outer periphery of the end of the lamp, and the lamp socket 3 has a socket main body 21, an end cap 22, and an intermediate cap 23.
A type of lamp is used in which the lamp 1 can be pulled out in the axial direction by removing the end cap 22. The intermediate cap 23 maintains the airtightness between the lamp protection cover 2 and the socket 3, and the end cap 22 maintains the airtightness of the entire lamp device including the lamp protection cover 2 and the sockets 3, 3 at both ends of the lamp 1. Prevents it from falling off. These two lamp devices and their reflectors 4,
The ballast 5 is housed in a container body 6 made of a steel plate, and a terminal box 7 is provided thereon. As shown in FIG. 1, the two lamp devices and the reflector 4 are
One end is rotatably supported by a hinge 18,
The other end is adapted to be displaced downward as shown by the two-dot chain line. Incidentally, upon this displacement, the relationship between the lamp sockets 21, 21 bodies and the reflecting plate 4 does not change at all, and therefore, the connection wire of the lamp socket also expands and contracts only slightly due to the play on the back side of the reflecting plate 4.

At the lower edge of the container body 6, a flange portion 8 is formed with bolt holes drilled at appropriate intervals for attachment to construction materials such as a ceiling. The lower opening surface of the container body 6 is sealed with a removable container protection cover 9. The container protective cover 9 consists of a glass plate 10 and a frame 11, and one side of the frame 11 is connected to one side of the flange portion 8 of the main body 6 and a set screw 1, as shown in FIG.
4, and the other side of the frame 11 is connected to the other side of the flange portion 8 of the main body 6 and the chain 1, as shown in FIG.
2 and fixed with a set screw 13. Note that the set screw 13 in FIG.
The frame body 11 is fixed to the flange portion of the main body 6 in exactly the same way as shown in the figure, but the chain 1
2 is shown, illustrations regarding fixation are omitted. Further, in both FIGS. 3 and 4, bolts for fixing the flange portion 8 of the container body 6 to construction materials are omitted from illustration. The outer periphery of the frame body 11 is bent upward, and a packing 15 is provided on the upper edge of the frame 11 so as to tightly contact the construction material 17.A packing 16 is also provided on the upper surface of the main body flange portion, and a packing 15 is provided on the upper edge of the frame 11 to secure the construction material 17.
It has come to be closely attached to

Therefore, by removing the setscrews 13 and 14, the container protective cover 9 can be removed from the main body 6 and left hanging from the main body 6 by the chain 12. Then, in this state, the lamp device is tilted around the hinge 18,
The lamp 1 can be pulled out from the lamp protection cover 2, as shown by the two-dot chain line in FIG.

<Effects> According to the present invention, since the inside of the container body is sealed from the outside world by the container body 6, the container protection cover 9, and the gaskets 15 and 16, there is no risk of dirt, dust, etc. entering. The lamp and lamp socket chamber, which can serve as an ignition source, have an airtight structure with the lamp protection cover 2 and the lamp sockets 3, 3, so that explosion-proof properties are maintained as in the conventional structure. Moreover, the volume of the parts that require airtightness has been significantly reduced compared to conventional structures.
The airtight performance required for safety-enhancing structures is further improved, increasing safety.

Furthermore, when replacing the lamp in the present invention, with the container protection cover 9 removed, simply tilt the lamp device around the hinge, remove the end cap of the lower lamp socket, and immediately move the lamp in the axial direction. Since the lamp can be pulled out, lamp replacement work can be done quickly and easily.
Moreover, only the lamp unit is required to have an explosion-proof structure; after replacing the lamp, the explosion-proof structure can be restored by simply tightening the screws on the end cap. Failures due to mistakes are less likely to occur, increasing safety.

In addition, according to the present invention, the container protection cover is lighter than the conventional guard type, making it easier to handle at high places, and by providing a chain, the container protection cover can be suspended in the air for lamp replacement. Since the work can be carried out, work efficiency is further improved.

Further, when attaching the container protective cover, it is sufficient to simply restore the sealed structure, so that the skilled skills required in the past are not required.

Furthermore, according to the present invention, the metal plate that makes up the container body can be made thinner than conventional products, making it lighter and easier to attach to construction materials. This has the effect of reducing the amount of water and improving the aesthetic appearance of the room.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of a side view showing an embodiment of the present invention, Fig. 2 is a transverse sectional view of the above embodiment, Fig. 3 is a detailed view of the part shown in Fig. 2, and Fig. 4 is a partial sectional view of the part shown in Fig. 2. FIG. 1... Fluorescent lamp, 2... Lamp protective cover, 3... Lamp socket, 4... Reflector, 5...
... Ballast, 6... Container body, 7... Terminal box, 8...
...Flange part, 9...Container protection cover, 10...
Glass plate, 11... Frame, 12... Chain, 1
5, 16... Patsukin.

Claims (1)

[Claims for Utility Model Registration] (1) The outer periphery of the lamp is covered with a translucent lamp protection cover, and a lamp socket is provided at the end of the lamp protection cover with a structure that allows the lamp to be attached and detached in the axial direction. A lamp device consisting of a lamp protection cover and the above-mentioned lamp sockets on both ends of the lamp device has an airtight structure, a hinge is provided at one end of the lamp device, the other end is supported rotatably so that it can be lowered, and a flange is provided for attachment to construction materials. The lamp device, the reflector, and the ballast are housed in a container formed around the bottom opening, the bottom opening is closed with a removable container protection cover, and the container protection cover frame and An explosion-proof lighting fixture comprising a construction material or a packing material interposed between the flange portion and the construction material. (2) The explosion-proof lighting device according to claim 1, wherein one side of the frame of the container protective cover and the flange are connected by a chain.