JPH0248157B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to improvements in explosion-proof boxes.

[Prior Art] In devices such as refueling devices that handle flammable hazardous materials such as gasoline, explosion-proof boxes are used to house electronic components. However, according to the prior art, the electronic components and electric wires, ie, signal lines, power lines, etc., were connected one by one within a narrow box, which was extremely troublesome. In addition, as is well known, explosion-proof boxes must be virtually completely sealed, so flanges are formed around the periphery of both the main body and the cover, and the flange portions are firmly tightened with a large number of bolts. Always. Therefore, if it is necessary to open the box due to an internal dotted wire or malfunction, care must be taken to ensure that the electrical connections are not damaged or severed.

For example, Japanese Utility Model Publication No. 58-44631 discloses a technique for connecting parts provided in an explosion-proof box with a connector. However, since such known technology is of a screw type, when there are a plurality of connectors, a screw cover is required for each connector, and a considerable number of man-hours are required to attach the screw cover. Furthermore, since the connector and wires rotate when screwed in, there is a risk that the wires may become kinked or become entangled with other parts.

[Problems to be Solved] Therefore, it is an object of the present invention to provide an explosion-proof box in which the connector installation work is simple and the electrical connections are not damaged or cut during installation or internal inspection.

[Means for Solving the Problems] An explosion-proof box according to the present invention includes a cable flange provided with a plurality of connectors connected to electric wires, the electric wires are inserted through the cable flange through packing, and another connector connected to the connector is inserted into the cable flange through a packing. The connector is connected to an electronic component built into the explosion-proof box body, the cable flange is attached to the explosion-proof box body with bolts, and the explosion-proof box body is provided with a plurality of insertion holes into which the connectors can be inserted.

[Explanation of function and effect] Therefore, insert multiple electric wires with connectors attached in advance to the cable flange, insert the connectors through the insertion opening of the explosion-proof box body, and connect them to another connector inside the explosion-proof box body. . In some cases, the box cover may be removed and the two connectors may be connected.

Then, simply attach the cable flange to the explosion-proof box body with bolts.

Therefore, it is possible to easily perform the work when connecting a plurality of connectors, and it is possible to shorten the work time when connecting a plurality of connectors. Since the electric wire is inserted through the cable flange through the gasket, it has a sufficient explosion-proof structure, and the cable flange only needs to be attached with bolts.
This work is also easy.

As described above, according to the present invention, since it is only necessary to attach the cable flange, the connector and the electric wires do not rotate unlike screwing, and the electric wires do not become entangled with other parts.

[Examples] Examples of the present invention will be described below with reference to the drawings.

FIG. 1 shows the entirety of an explosion-proof box embodying the present invention.The explosion-proof box main body 1 (hereinafter referred to as the box main body) is formed into a box shape with one side open, and a flange F1 is formed around the open opening. has been done. Box cover C that closes this opening
is also provided with a flange F2 around the periphery, and both flanges F1 and F2 are fixed and sealed by a number of bolts B. On the other hand, the connector insertion cover (hereinafter referred to as cover), which will be described later, has a second
Electric wires 6a and 6b having connectors 5a and 5b are inserted therethrough. These connectors 5a and 5b can be inserted into the main body 1 through connector insertion holes (hereinafter referred to as insertion holes) 2a and 2b formed in the side wall 1b of the main body 1, and this cable flange 10 is fixed to the side wall 1b with bolts. It's becoming like that.

As shown in FIG. 2, electronic components 3a and 3b are installed inside the box body 1, and first connectors 4a and 4b are provided on one side of the box body 1. The second connectors 5a and 5b are connected.

As mentioned above, the cable flange 10 covering the insertion holes 2a, 2b is attached to the side wall 1b of the box body 1 with six bolts 11-11.

The cable flange 10 has insertion holes 2a,
Bulging portions 13, 13 are formed opposite to 2b, and each bulging portion 13 is provided with a wire holder 15. The wire holder 15 is formed with a cylindrical portion 16 that fits up to the middle of the stepped center hole 14 of the bulge 13 and a flange portion 17 having the same shape as the top surface of the bulge 13. De bolt 2
It is attached to the bulge 13 by 0,20.

Multiple wires 6a and 6b are inserted into the through hole 18 of the cylindrical portion 16 of the wire holder 15, respectively, and these wires 6a and 6b are connected to second connectors 5a and 5b, respectively. 6
b and the stepped center hole 14, there is a packing 1 for sealing the electric wire and the cable flange 10.
9 and 19 are interposed. In addition, the electric wires 6a, 6
A slack C is provided in b to facilitate connection of the connectors.

The present invention is constructed as described above, and the connector is first connected to the cable flange 10 and the second
Electric wires 6a, 6b connecting connectors 5a, 5b of
Assembly A (bolts 11 to 11 are removed from around the cable flange 10 in Figure 1) is assembled with the second connector 5a, 5b into the insertion hole 2a,
2b, and attach the assembly A to the box body 1 with bolts 11-11.

Next, the second connectors 5a, 5b are connected to the first connectors 4a, 4b, respectively. At this time, the above-mentioned slack C of the electric wire allows the connector to be easily connected.

Finally, attach the box cover C to the box body 1 with bolts B.

To maintain or replace electronic components and wires, first remove the box cover C from the box body 1, then connect the second connectors 5a, 5b to the first connectors 4a, 5b.
4b, and finally remove the bolts 11-11 and remove the assembly A from the box body 1 while passing the second connectors 5a, 5b through the insertion holes 2a, 2b.

FIG. 3 shows another embodiment of the present invention, in which the electronic components 3a, 3b are moved closer to the side wall 1b of the box body 1, and the first connectors 4a, 4b are inserted into the insertion holes 2.
a′, 2b′, and the insertion holes 2a′, 2b′ are formed to a size that allows connector connection and separation;
This is an example in which the slack C of the electric wires 6a and 6b is made long enough to enable connector connection and separation, and the other configurations are the same as in FIG. 1.

In this embodiment, without removing the box cover, the second connector 5a,
5b and connect it to the first connectors 4a and 4b, attach the cable flange 10 to the box body 1, and then remove the cable flange 10 from the box body 1 without removing the box cover, and then connect the second connector. 5a, 5b can be separated from the first connectors 4a, 4b.

FIG. 4 shows still another embodiment of the present invention, in which the electronic components 3a and 3b are located on the side wall 1 of the box body 1.
b, the first connectors 4a, 4b are provided facing the insertion holes 2a, 2b, and the second connectors 5a, 4b are provided facing the insertion holes 2a, 2b.
5b is provided in contact with the cable flange 10, and the other components are configured in the same manner as in FIG. 1.

In this embodiment, the connector can be connected and disconnected from the cable flange 1 without removing the box cover.
0 to and from the box body 1 at the same time.

[Effects of the Invention] As described above, according to the present invention, the following excellent effects are achieved.

(i) Even if there are multiple connectors, only one flange cover needs to be attached, making the work easy.

(ii) Installation time can be reduced.

(iii) Since the connector and wires do not rotate during installation, the wires will not get tangled with other parts, and there is no risk of damage or cutting the wires.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an explosion-proof box embodying the present invention, and FIGS. 2 to 4 are sectional views of essential parts showing first to third embodiments of the present invention, respectively. 1...Box body, 2a, 2a', 2b, 2b'...
Insertion hole, 3a, 3b...electronic component, 4a, 4b...first connector, 5a, 5b...second connector, 6
a, 6b...Electric wire, 10...Cable flange.

Claims (1)

[Claims] 1 A cable flange with a plurality of connectors connected to an electric wire is provided, the electric wire is inserted through the cable flange through a packing, and another connector connected to the connector is connected to an electronic component built in the explosion-proof box body. The explosion-proof box is characterized in that the cable flange is attached to the explosion-proof box main body with bolts, and the explosion-proof box main body is provided with a plurality of insertion openings into which connectors can be inserted.