JP5327970B2 - Electrical equipment storage box - Google Patents

Description

  The present invention relates to an electric device storage box for storing an electric device having a short-circuit breaking function such as a circuit breaker or an earth leakage breaker.

  An electric device having a short-circuit breaking function such as a circuit breaker or an earth leakage breaker may be stored in a relatively small electric device storage box having a door (for example, Patent Document 1). Such a relatively small electric device storage box usually does not have a sufficient capacity in the box. For this reason, the internal pressure of the box suddenly rises due to the high-temperature and high-pressure gas ejected when the built-in electric device cuts off the short-circuit current, and the door covering the opening of the box body may open. In this case, since high-temperature gas is blown out from between the box body and the door, there is a safety problem when a person is present near the electric equipment storage box.

JP 2006-230153 A

  An object of the present invention is to solve the above-described conventional problems, and to provide an electric equipment storage box that prevents a door from being opened by a gas generated when a short-circuit current is interrupted, and that also solves a safety problem. To do.

  The present invention made to solve the above problems comprises a box main body in which an electric device having a short-circuit breaking function is accommodated and a door covering the opening, and a joint with the door at the opening of the box main body; An electric equipment storage box having an outer side portion formed therein and an insulating partition higher than the outer side portion formed inside the outer side portion, the bottom surface of the groove portion between the outer side portion and the insulating partition wall This is characterized in that a gas discharge hole is provided. In addition, it is preferable that the gas discharge hole has a slit shape and is provided over the entire circumference of the box body, and it is preferable that the door locking portion is provided so as to engage with the gas discharge hole, and the thin plate portion that closes the gas discharge hole Is preferably provided.

  Since the electrical equipment storage box of the present invention is provided with a gas discharge hole in the bottom surface of the groove between the outer side and the insulating partition, it occurs when the built-in electrical equipment cuts off the short-circuit current. High-temperature and high-pressure gas is discharged from the gas discharge hole, and the door is not opened by the internal pressure. Moreover, since the gas passes between the outer side edge and the insulating partition and is ejected from the bottom surface of the groove portion to the side opposite to the door, that is, the wall surface side, there is no safety problem even if there is a person in the vicinity.

  If the gas discharge hole is formed in a slit shape over the entire circumference of the box body, the effective sectional area of the gas discharge hole can be increased, and the increase in internal pressure can be suppressed. In addition, since each gas discharge hole can be made small, no wire or the like is inserted from the outside. Moreover, if the latching | locking part of a door is provided so that it may engage with a gas exhaust hole, an engaging part will fit in the inside of a gas exhaust hole, and a door will be firmly engaged. Further, if a thin plate portion for closing the gas discharge hole is provided, it can be used outdoors as a waterproof box, and the gas can be discharged by breaking the thin plate portion with the gas generated when the short-circuit current is interrupted.

It is a perspective view which shows embodiment of this invention. It is a perspective view of the box main body except a door. It is sectional drawing of the principal part. It is a top view of the box main body except a door. It is a bottom view of a box body. It is explanatory drawing of a gas discharge path | route. It is sectional drawing of a latching | locking part in a door.

Preferred embodiments of the present invention are shown below.
As shown in FIG. 1, the electrical equipment storage box of this invention consists of the box main body 1 and the door 2 which can be opened and closed which covers the opening part. The box body 1 is made of resin, and is used for housing an electric device 3 having a short circuit cutoff function, for example, a breaker.

  In this embodiment, a daruma hole 11 is formed in the upper part of the bottom surface of the box body 1 so that it can be hung on the wall surface. The door 2 is also made of resin, and one side of the door 2 is pivotally attached to the opening of the box body 1 by a hinge 4 and has a structure that can be kept closed by the locking part 5. The electrical equipment 3 has a large capacity, and the volume in the box is sufficient to accommodate the electrical equipment 3 alone, and has a sufficient volume in the box, such as a distribution board or switchboard. is not.

  An outer side portion 6 is formed in the opening of the box body 1 over the entire circumference. As shown in FIG. 3, the outer side portion 6 is connected to the outer periphery of the opening of the box body 1 by the horizontal side portion 7, and the upper end surface of the outer side portion 6 becomes a joint portion 8 with the door 2. It has a structure to receive. Further, an insulating partition wall 9 that forms an opening of the box body 1 is formed inside the outer side portion 6. The insulating partition wall 9 is higher than the outer side portion 6, and even if a wire or the like is inserted from the joint portion 7 with the door 2 closed by this structure, the insulating partition wall 9 becomes a barrier and does not reach the internal electrical equipment. ing.

  In the present invention, the gas discharge hole 10 is provided in the horizontal side portion 7 which is the bottom surface of the groove portion between the outer side portion 6 and the insulating partition wall 9. The gas discharge hole 10 penetrates the horizontal side portion 7 as shown in FIGS. Although the shape and arrangement thereof are arbitrary, in this embodiment, in order to increase the effective cross-sectional area, it is formed into an elongated slit shape and is formed over the entire circumference of the box body 1.

  The electrical equipment storage box of the present invention formed in this way, as shown in FIG. 6, when the built-in electrical equipment 3 generates high-temperature and high-pressure gas when the short-circuit current is interrupted to increase the internal pressure of the box. The gas is guided along the back surface of the door 2, flows between the insulating partition wall 9 and the bottom surface of the groove portion, and is quickly discharged from the numerous gas discharge holes 10. For this reason, the door 2 is not opened by the internal pressure as in the prior art. Further, since the gas discharge direction is on the side opposite to the door 2, that is, on the wall surface side, there is no safety problem even if a person is present in the vicinity.

  In order to enhance the gas induction effect, it is preferable to form the corner portion of the door 2 in a circular arc shape as in the embodiment, but the shape of the door 2 is limited to this. is not.

  Moreover, FIG. 7 is sectional drawing of the latching | locking part of a door. A handle 12 that opens and closes the door 2 is provided so as to protrude from the end of the door, and a locking piece 13 that extends from the handle 12 and includes a locking portion 14 at the tip is provided. The locking piece 14 is engaged with the gas discharge hole 10, and when the handle 12 is pulled forward, the door 2 is elastically deformed and the locking portion 14 is detached from the gas discharge hole 10 to open the door 2. It can be done.

  With this structure, the engaging portion 14 is fitted inside the gas discharge hole 10, and the door-side locking piece 13 is engaged in the substantially U-shaped end portion of the box-side outer side portion 6, The door can be firmly engaged. 7 is provided with a thin plate portion 15 that closes the gas discharge hole 10 at an appropriate height position of the gas discharge hole 10, so that it can be used outdoors as a waterproof box, and the short circuit current can be reduced. The gas can be discharged by breaking the thin plate portion 15 with the generated gas when shut off.

DESCRIPTION OF SYMBOLS 1 Box main body 2 Door 3 Electric equipment 4 Hinge 5 Locking part 6 Outer side part 7 Horizontal side part 8 Joint part 9 Insulating partition 10 Gas discharge hole 11 Daruma hole 12 Handle 13 Locking piece 14 Locking part 15 Thin plate part

Claims (4)

  A box body in which electrical equipment having a short-circuit breaking function is housed and a door that covers the opening portion are formed, and an outer side portion that becomes a joint portion with the door is formed in the opening portion of the box body, and from the outer side portion, An electrical equipment storage box in which an insulating partition higher than the outer side is formed on the inner side, wherein a gas discharge hole is provided on the bottom surface of the groove between the outer side and the insulating partition. Storage box.   2. The electric equipment storage box according to claim 1, wherein the gas discharge hole has a slit shape and is provided over the entire circumference of the box body.   The electric device storage box according to claim 1, wherein a locking portion of the door is provided so as to engage with the gas discharge hole.   The electric device storage box according to claim 1, further comprising a thin plate portion that closes the gas discharge hole.

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