JPS6318090Y2 - - Google Patents

Description

[Detailed description of the invention] (Purpose of the invention) The invention consists of an explosion-proof lighting fixture that is embedded between the main ceiling and the decorative ceiling, and a terminal box that connects the wiring inside the explosion-proof lighting equipment and the power line in an explosion-proof manner. This invention relates to an explosion-proof recessed lighting system consisting of an explosion-proof recessed lighting system, and its purpose is to improve work efficiency by making it possible to perform wiring work after installing a decorative ceiling board even when the space between the main ceiling and the decorative ceiling is narrow.

(Conventional Disadvantages) FIGS. 1 and 2 show a conventional explosion-proof recessed lighting device. In the figure, 1 is the main ceiling, 2
The decorative ceiling 3 is fixed to the main ceiling 1 through a desired space, and the explosion-proof lighting fixture is embedded between the decorative ceiling 2 and the main ceiling 1 and has a non-sealed structure and a breathable body. 4 is the explosion-proof lighting fixture. This is a terminal box for connecting the wiring 5 of the lighting fixture 3 and the power line 6 in an explosion-proof manner. Reference numeral 7 designates a conduit tube that houses the power supply line 6, and is connected to the terminal box 4 at one end and to the connection box 8 at the other end.

In this device, when the decorative ceiling 2 is installed first, the explosion-proof lighting equipment 3 is installed from below the decorative ceiling 2.
After that, go into the ceiling and install conduit 7.
Because the work is complicated because it requires piping work and connection work between the power line 6 and the wiring 5, the explosion-proof lighting fixture 3 is usually first fixed to the main ceiling 1, and the power line 6 and the power line 6 are connected in the terminal box 4. The wiring 5 is connected and then the decorative ceiling 2 is installed. However, even when such a procedure is taken, since the explosion-proof lighting fixtures 3 are installed before installing the decorative ceiling 2, variations occur in the mounting heights of the plurality of explosion-proof lighting fixtures 3, and the decorative ceiling 2
The drawback was that it was difficult to level the surface.

(Example) This invention was made in view of such drawbacks,
The embodiment shown in FIGS. 3 and 4 will be described below.

In the figure, 1...main ceiling, 2...decorative ceiling, 3...
Explosion-proof lighting equipment, 6... power supply line, 8... connection box are similar to those of the conventional example. Reference numeral 9 denotes a conduit tube for storing the power line 6, and a connection box 8 fixed to the main ceiling 1.
It hangs down from the main ceiling 1 and has a threaded portion 9a at its lower end. 10 is a terminal box main body which has an opening surface 10a for connection on the lower surface and a female threaded portion 10b on the upper surface to be screwed into the threaded portion 9a, and after connecting the power line 6 and the wiring 5 in the appliance inside,
A terminal box 12 is configured together with a lid 11 that is closed in an explosion-proof manner.

Such an explosion-proof lighting system is constructed using the following steps. First, the connecting box 8 and the electric conduit 9 are attached to the main ceiling 1, and then the decorative ceiling 2 is laid while keeping it level. Next, the main body 13 of the explosion-proof lighting fixture 3 is fixed to the main ceiling 1 with the flange 13a abutting against the decorative ceiling 2 via the packing 14 and further exposing the lower end of the electric conduit 9 inside. (The fixing means is omitted in the figure.) Furthermore, the terminal box main body 10 is pushed up from below and the threaded part 9 of the conduit 9 is inserted through the inside of the main body 13.
After screwing and attaching the wires to a, it is closed with a lid 11. Furthermore, after inserting the lamps 15, 15, 15, a cover 17 having a decorative frame 16 around the decorative frame 1 is attached.
6 is brought into contact with the packing 14 and covers the lower surface of the main body 13.

(Effects of the present invention) The present invention is constructed as described above, and includes an explosion-proof lighting fixture 3 embedded between the main ceiling 1 and the decorative ceiling 2.
and a terminal box 4 for connecting the wiring 5 inside the explosion-proof lighting fixture 3 and the power line 6 in an explosion-proof manner. By forming an opening surface 10a that opens downward and is closed with a lid 11 in the terminal box 4, the explosion-proof lighting equipment 3 can be installed and the wiring 5 and the power line 6 can be connected from below. So,
First, install the decorative ceiling 2, and then install the explosion-proof lighting equipment 3.
installation and connection of the wiring 5 and power line 6 can be done simultaneously from below, the decorative ceiling 2 can be easily leveled, and the work can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a ceiling-mounted explosion-proof recessed lighting device compared to the present invention, and FIG. 2 is a cross-sectional view of essential parts of the same. 3 and 4 show an embodiment of the present invention. FIG. 3 is a cross-sectional view showing the explosion-proof embedded lighting device attached to a ceiling, and FIG. 4 is a cross-sectional view of the main parts thereof. 1... Main ceiling, 2... Decorative ceiling, 3... Explosion-proof lighting equipment, 5... Wiring inside the equipment, 6... Power line, 10
... Terminal box body, 11 ... Lid, 12 ... Terminal box.

Claims (1)

[Scope of utility model registration request] In an explosion-proof recessed lighting device comprising an explosion-proof lighting fixture embedded between a main ceiling and a decorative ceiling, and a terminal box for connecting wiring inside the explosion-proof lighting fixture and a power line in an explosion-proof manner, the explosion-proof lighting 1. An explosion-proof recessed lighting device, characterized in that a terminal box is installed inside the device, and the terminal box has an opening surface that opens downward and is closed with a lid.