JPS5915468B2 - switchboard - Google Patents

Description

[Detailed description of the invention] This invention provides a switchboard with a fireproof structure.

Generally speaking, in a building where an unspecified number of people come in and out, when a fire breaks out, not only is the power cut off, resulting in darkness, but also various electrical devices, especially those used for evacuation, stop working, causing great damage. It is something.

For this reason, fire-resistant, or insulating, wiring has already been developed, but equipment such as insulators and fuses have not yet been sufficiently fire-resistant. , the above-mentioned circuit breakers and other equipment are installed on a power distribution board or distribution board (hereinafter the present invention is referred to as a power distribution board and is used in a broad sense to include a power distribution board).
The switchboard was housed in a fire-resistant structure, and there was a strong demand for a fire-resistant structure for this switchboard.

This invention was made based on these circumstances,
It has a double structure with an insulating box inside the metal casing.
The premise is to ensure fireproof protection by storing the necessary equipment in the above-mentioned heat-insulating box. By inserting the lower plate removably into the slide grooves formed between the upper and lower end surfaces of the insulating side plate of the insulating box, the lower plate can be easily installed in terms of heat insulation. The purpose is to provide a power distribution board in which the upper and lower plates can be easily fixed by fixing the upper and lower plates at the same time by fixing the heat insulating lid, and the structure is simple and the entire Hayabusa can be easily assembled. That is.

An embodiment of the present invention will be described below based on the drawings.

In the figure, reference numeral 1 denotes a casing, and the casing 1 is made of a metal plate and has a box-like shape with an open front.

A pair of fixing fittings 4 facing each other in the vertical direction are attached to both side surfaces of the housing 1 by means of welding or the like.

Are these fixing metal fittings 4... each in the shape of a cross section?
One side is fixed to the side of the housing 1, and the other side is a sliding surface 5.

The vertically spaced metal fittings 4 are arranged so that their sliding surfaces 5 face each other.

The heat insulating box 9 is provided inside the casing 1 as described above.

The heat insulating box 9 has a back plate 10, side plates 11 and 12, an upper plate 13, and a lower plate 14 each made of a heat insulating material such as perlite, which are connected to each other and assembled into a box shape.
The front is open.

The back plate 10 and both side plates 11.12 overlap the back side and both side plates of the housing 1, and the upper and lower end surfaces of these side plates 11.12 are the sliding surfaces of the fixing fittings 4. 5. Separate and face each other.

As shown in FIG. 3, a slide groove 20 is formed between the upper and lower end surfaces of the side plates 11, 12 and the slide surface 5. There is.

The respective ends of the upper plate 13 and the lower plate 14 are removably inserted into the slide grooves 20.

Therefore, the upper plate 13 and the lower plate 14 are connected to the slide groove 2.
0... and connected to the side plates 11, 12 and the back plate 10 to form a heat insulating box 9.

Predetermined electrical equipment necessary for power distribution and distribution is accommodated in such a heat insulating box 9.

In this embodiment, these devices include the terminal block 24, the heat-resistant molded circuit breakers 25, 26, 27, the fuse 28, and the transformer 29.
28 and 29 are attached to and integrated with the unit board 30.

Thus, the unit board 30 is fixed to the back surface of the heat insulating box 9.

The unit board 30 has an arm 33 extending toward the front side.
These arms 33... are provided with protruding legs.
A circuit breaker protection plate 34 is fixed to . . . through screws 35.

The operating handles of the circuit breakers 25, 26 and 27 fixed to the unit board 30 are exposed from the circuit breaker protection plate 34.

The heat insulating box 9 that accommodates each device in this way is
The front opening is closed by an inner lid 36 serving as a heat insulating lid.

This inner lid 36 has an inner frame 38 having an opening window 37 in the center.
and an inner door 39 that closes the opening window 37 so as to be openable and closable.

Incidentally, the inner lid 36 is attached to the front opening of the heat insulating box 9, and at this time, the back surface is brought into contact with the front edges of the upper plates 13 and 14 of the heat insulating box 9. ing.

That is, the upper plate 13 and the lower plate 14 are respectively the side plates 11.
Since the inner lid 36 is inserted into the slide groove 20 formed between the upper and lower end surfaces of the upper plate 12 and the fixing metal fitting 4, by fixing the inner lid 36 as described above, the upper plate 13 and It is possible to hold down the lower plate 14 so that it does not come out from the slide groove 20.

In front of the inner lid 36 is a front frame 45 that closes the opening of the housing 1.
A front cover 55 consisting of a front door 46 and a front door 46 is provided.

Further, 51 is a latch, and 53 is a pilot lamp, which are connected to the transformer 29 by a cord (not shown).

As mentioned above, in the case of the heat insulating box 9 fixed to the back of the housing 1 including the back plate 10 and side plates 11 and 12, the upper plate 13
And lower plate 14? Since it is attached removably, installation at the site is easy.

That is, the upper plate 13 and the lower plate 14 are respectively the side plates 11.
Since the housing 1 is removably inserted into the slide groove 20 formed between the upper and lower end surfaces of the housing 12 and the fixing fittings 4, the housing 1 can be attached to the wall of a building, etc. When attaching it to the embedding hole formed in , it can be fixed with the upper plate 13 and lower plate 14 and the hair removed.

That is, when the upper plate 13 and the lower plate 14 are removed, a large space is formed within the casing 1, which facilitates the work required to embed and fix the casing 1 into a wall surface.

Furthermore, prior to burying such a case 1, openings such as wiring introduction holes must be formed in the upper and lower plates of the case 1 on-site.
If these holes are removed, there will be no inconvenience such as inadvertent damage to the upper plate 13 and lower plate 14 made of these heat insulating plates during work.

After attaching the circuit breaker protection plate 34 to the unit board 30,
When the inner cover 36 is attached, the back surface of the inner frame 38 comes into contact with the upper plate 13 and the lower plate 14.

For this reason, the upper plate 13 and the lower plate 14 have slide grooves 20...
...An integral fixation is achieved without movement within the structure.

According to such a power distribution board, a heat insulating box 9 is configured inside the casing 1, and various devices are housed in the heat insulating box 9, so that the various devices are thermally protected and protected from the outside in the event of a fire. Even if the device is heated, it will continue to operate reliably without stopping its function.

As explained above, the present invention comprises a heat insulating box inside a metal casing, and various devices are housed in this heat insulating box, so that the devices are thermally protected.
Therefore, even if it is heated from the outside in the event of a fire, it can operate reliably, so the intended function can be fully demonstrated and damage can be kept to a minimum.

In addition, since the casing is made of metal, it has excellent mechanical strength, and the casing receives external forces from the outside.Also, the heat from the outside is received by the insulating box, so there is no deformation, and it is fireproof. It satisfies the function as a structure.

In particular, in the present invention, a slide groove is formed between a plurality of fixing metal fittings installed in the housing and the end face of the heat insulating side plate of the heat insulating box, so that it can be inserted into and removed from the slide groove on the lower plate in terms of heat insulation. Since it is inserted into the bottom plate, it provides good insulation and makes it easier to install the lower plate.

In addition, since the lower plate can be fixed integrally with the heat-insulating lid, the fixing structure becomes simple.

In addition, for insulation purposes, when the bottom plate is removed, there is a space inside the housing, which makes it easier to bury and secure the housing, and also makes it easier to carry the equipment stored in the insulation box up and down. Since the work can be done by removing the board, a large work space is secured and the work can be done easily, which has practical effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view of the assembled state, FIG. 2 is an exploded perspective view of the same, and FIG. 3 shows the state in which the upper and lower plates of the heat insulating box are attached. FIG. 4 is an exploded perspective view showing the inner lid installed, and FIG. 5 is a sectional view taken along the line v--v in FIG. 1. 1...Housing, 4...Fixing metal fittings, 9.
...Thermosensitive box, 10... Heat insulating back plate, 11.12... Heat insulating side plate, 13...
...Insulating upper plate, 14...Insulating lower plate, 20
......Slide groove, 30...Unit board, 36...Inner lid, 45...Front frame.

Claims (1)

[Scope of Claims] 1. A metal casing having an opening on the front, a pair of fixing fittings attached vertically apart from each other on both sides of the casing, and a metal casing along both sides of the casing. A heat insulating side plate provided between each pair of fixing metal fittings and having a slide groove formed between the upper and lower end faces and the fixing metal fitting, and a heat insulating upper plate, lower plate and back plate that are removably inserted into the slide grooves. an insulating box formed in the casing and having an open front; a device housed in the insulating box; an insulating lid covering the opening of the insulating box; A power distribution board characterized by comprising a lid body that covers an opening. 2. A metal casing with an opening on the front, and a pair of fixing metal fittings fixed at a distance inside the casing,
Both side plates are provided along both sides of the housing and between each pair of fixing metal fittings, and form a slide groove that is open to the front side between each upper and lower end face and the above-mentioned fixing metal fittings. an insulating box that is slidably inserted and has an upper, lower, and back plate that are opened at the front of the insulating box, equipment housed in the insulating box, and a device that is attached and fixed to the fixing bracket. A switchboard comprising: a heat insulating cover that covers the opening of the heat insulating box and whose back surface is in contact with the front edge of the lower plate; and a cover that covers the opening of the cover.