JP3246633B2 - Box for storing electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a knockout hole for inserting and removing electric wires in a box for storing electric equipment for storing electric equipment.

[0002]

2. Description of the Related Art Conventionally, in a box for housing electrical equipment for housing electrical equipment, a knockout hole is formed in a bottom surface of a side plate of a box body 22 of the box 21 for electrical equipment as shown in FIG. Knockout hole 2 for circular metal tube / synthetic resin tube
3 were provided. The metal tube / synthetic resin tube knockout hole 23 was opened, and a metal tube or a synthetic resin tube was connected to the opening, and electric wires were input / output.

As shown in FIG. 5, a rectangular cable knockout hole 24 is provided in the back plate of the box body 22 of the box 21 for storing electrical equipment. The cable knockout hole 24 is opened, and the periphery of the opening is protected by a bushing made of rubber or the like, and then the electric wires are input and output.

[0004]

However, the conventional electric device housing box 21 shown in FIGS. 4 and 5 inserts and outputs electric wires in a place where a knockout hole 23 for a circular metal tube / synthetic resin tube is formed. In this case, there is a disadvantage that a knockout hole for a rectangular cable must be opened.

[0005] In addition, when electric wires are inserted / exited at a place where the rectangular cable knockout hole 24 is formed, there is a disadvantage that a circular metal pipe / synthetic resin pipe knockout hole must be opened at another place. there were.

Further, in order to increase the opening size of the knockout hole, there is a disadvantage that the knockout hole must be separately opened.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional box for accommodating electric equipment, an object of the present invention is to provide a knockout hole capable of accommodating both a metal tube / synthetic resin tube knockout hole and a cable knockout hole. The present invention provides an electric device storage box body including: a box body having at least an opening, and an electric device configured by a door body covering the opening of the box body. A box body for storing electrical equipment, wherein a first knockout hole is formed on at least one surface of a side plate or a back plate of the box body, and the same surface as the surface on which the first knockout hole is formed. A second knockout hole including a part or the entirety of the first knockout hole, and a width of a joint portion of the first knockout hole.
Of the width of the joint of the second knockout hole than the sum of
Is that it was formed larger .

[0008] In the box for storing electric equipment,
When the center of the first knockout hole and the center of the second knockout hole are the same, a straight line connecting the center and the center of the joint of the first knockout hole and the center of the joint of the center and the second knockout hole are formed. That is, the connecting straight line does not match.

[0009]

In the electric device storage box, when inserting and removing electric wires, a circular metal tube / synthetic resin tube knockout hole is opened at a first knockout hole, and a metal tube or a synthetic resin tube is inserted into the opening. Connect. In addition, a second knockout hole of the rectangular cable knockout hole is opened, and the periphery of the opening is protected by a bushing made of rubber or the like, and then the wire enters and exits.

[0010]

FIG. 1 shows a first embodiment of a box for storing electric equipment according to the present invention. Hereinafter, the present invention will be described with reference to the drawings.

The electric device housing box 1 is composed of a box body 2 having an opening and a door (not shown) covering the opening of the box body. The first knockout holes 3, 4, 5 are formed on the bottom surface of the side plate, and the first knockout holes 3, 4, 5 are formed on the same surface where the first knockout holes 3, 4, 5 are formed. The second knockout holes 6 and 7 are formed.

In the electric device housing box 1 having the above-described configuration, when electric wires are inserted and outputted, the first knockout holes 3, 4, and 5 of the circular metal tube / synthetic resin tube knockout holes are appropriately formed. An opening is formed, and a metal tube or a synthetic resin tube is connected to the opening. Also, the second knockout holes 6 and 7 of the rectangular cable knockout holes are appropriately opened, and the periphery of the openings is protected by a bushing made of rubber or the like, and then the electric wires are input / output.

Further, in the electric device housing box 1, the joints A, B, C, and C of the second knockout hole 6 are larger than the sum of the widths of the joints a and b of the first knockout hole 3.
The sum of the widths of D and E is larger. Also,
The sum of the widths of the joints c, d, e, f of the first knockout holes 4, 5 is larger than the joint F, of the second knockout hole 7,
The sum of the widths of G, H, I, J, K, and L is larger.

Further, in the electric device housing box 1, the center P of the first knockout hole 3 and the center P of the second knockout hole 6 are the same, but the center P and the first knockout hole are joined. A straight line connecting the centers of the parts a and b and the center P
Does not coincide with the straight line connecting the centers of the joints A, B, C, D, and E of the second knockout hole. Therefore, when only the first knockout hole 3 is opened, the shock is applied to the second knockout hole 6. Hardly transmitted to the joints A, B, C, D, E of
There is no chain opening.

The knockout hole of the box for storing electrical equipment according to the present invention is located at the box body 2 of this embodiment.
The present invention is not limited to the bottom surface, but may be formed on at least one surface of the side plate or the back plate, and can be appropriately changed without departing from the gist of the present invention.

Further, the number of the first knockout holes included in one second knockout hole is not limited to the present embodiment, and can be appropriately changed without departing from the gist of the present invention.

Further, the number of the joints of the knockout holes is not limited to the present embodiment, but can be appropriately changed without departing from the gist of the present invention.

FIG. 2 shows a second embodiment of a box for storing electric equipment according to the present invention. Hereinafter, the present invention will be described with reference to the drawings.

The box 11 for storing electrical equipment comprises a box body 12 having an opening and a door (not shown) covering the opening of the box body. The first knockout holes 13 and 14 are formed on the bottom surface of the side plate, and the second knockout hole 15 including the first knockout hole 13 is formed on the same surface as the surface on which the first knockout holes 13 and 14 are formed. A second knockout hole 16 including the first knockout hole 14 is formed on the same surface as the surface on which the first knockout holes 13 and 14 are formed.

In the electric equipment housing box 11 thus configured, the second knockout hole 15 is opened in order to increase the opening size of the first knockout hole 13. Further, in order to increase the opening size of the first knockout hole 14, the second knockout hole 16 is opened.

Further, in the electric device housing box 11, the joints 1A, 1A of the second knockout hole 15 are larger than the sum of the widths of the joints 1a, 1b of the first knockout hole 13.
The sum of the widths of 1B, 1C and 1D is formed larger. Also, the joints 1c, 1 of the first knockout hole 14
The sum of the widths of the joints 1E, 1F, 1G, 1H, 1I, 1J of the second knockout hole 16 is formed larger than the sum of the widths of d.

Further, in this electric equipment housing box 11, the center Q of the first knockout hole 13 and the center Q of the second knockout hole 15 are the same, but the center Q and the first knockout hole are joined. A straight line connecting the centers of the parts 1a and 1b, and the joints 1A and 1 between the center Q and the second knockout hole.
Since it does not match the straight line connecting the centers of B, 1C and 1D,
When only the first knockout hole 13 is opened, the impact is applied to the joints 1A, 1B, 1 of the second knockout hole 15.
It is difficult to be transmitted to C and 1D, and there is no chain opening.

Also, in the electric device housing box 11, the center R of the first knockout hole 14 and the center R of the second knockout hole 16 are the same, but the center R and the first knockout hole are joined. A straight line connecting the centers of the portions 1c and 1d, and a joining portion 1E, 1 between the center R and the second knockout hole.
F, 1G, 1H, 1I, and 1J do not coincide with the straight line connecting the centers thereof. Therefore, when only the first knockout hole 14 is opened, the impact is applied to the joint 1 of the second knockout hole 16.
E, 1F, 1G, 1H, 1I, and 1J are not easily transmitted, and do not open in a chain.

The place where the knockout hole of the box for storing electric equipment according to the present invention is formed is the box body 2 of the present embodiment.
The present invention is not limited to the bottom surface, but may be formed on at least one surface of the side plate or the back plate, and can be appropriately changed without departing from the gist of the present invention.

FIG. 3 shows a third embodiment of a box for storing electric equipment according to the present invention. Hereinafter, the present invention will be described with reference to the drawings.

The box 21 for storing electrical equipment comprises a box body 22 having an opening and a door (not shown) covering the opening of the box body. The first knockout holes 23, 24, 25 are formed on the bottom surface of the side plate, and the first knockout holes 23, 24, 25 are formed on the same surface as the surface on which the first knockout holes 23, 24, 25 are formed.
Forming second knockout holes 26, 27 including
Knockout holes 28 connected to these knockout holes
Is formed.

In the electric device housing box 1 having the above-described configuration, when electric wires are inserted and outputted, the first knockout holes 23, 24, and 25 of the circular metal tube / synthetic resin tube knockout holes are appropriately formed. An opening is formed, and a metal tube or a synthetic resin tube is connected to the opening. Also, the second knockout holes 26 and 27 and the knockout hole 28 of the rectangular cable knockout holes are appropriately opened, and the periphery of these openings is protected by a bushing made of rubber or the like, and then the electric wires are input / output.

Also, in the electric device housing box 21, the joints 2A, 2A of the second knockout hole 26 are larger than the sum of the widths of the joints 2a, 2b of the first knockout hole 23.
The sum of the widths of 2B, 2C, 2D, and 2E is larger. Also, the joints 2F, 2G, 2H, 2I, 2 of the second knockout hole 27 are larger than the sum of the widths of the joints 2c, 2d, 2e, 2f of the first knockout holes 24, 25.
The sum of the widths of J, 2K, and 2L is larger.

Further, in the electric device housing box 1, the center S of the first knockout hole 23 and the center S of the second knockout hole 26 are the same, but the center S is joined to the first knockout hole. A straight line connecting the centers of the portions 2a and 2b, and the joining portions 2A and 2 between the center S and the second knockout hole.
Since it does not coincide with the straight line connecting the centers of B, 2C, 2D, and 2E, when only the first knockout hole 3 is opened, the impact is applied to the joints 2A, 2 of the second knockout hole 26.
B, 2C, 2D, and 2E are not easily transmitted, and do not open in a chain.

The place where the knockout hole of the box for storing electric equipment according to the present invention is formed is the box body 2 of the present embodiment.
The present invention is not limited to the bottom surface of 2, but may be formed on at least one surface of the side plate or the back plate, and can be appropriately changed without departing from the gist of the present invention.

Further, the number of the first knockout holes included in one second knockout hole is not limited to the present embodiment, and can be appropriately changed without departing from the gist of the present invention.

Further, the number of the joints of the knockout holes is not limited to the present embodiment, but can be appropriately changed without departing from the gist of the present invention.

[0033]

As described above, the knockout hole of the box for housing electrical equipment according to the present invention is constituted by a box body having at least an opening and a door covering the opening of the box body. An electrical equipment storage box for storing the electrical equipment, wherein at least one of a side plate or a back plate of the box body is provided.
By forming a first knockout hole on a surface and forming a second knockout hole including a part or all of the first knockout hole on the same surface as the surface on which the first knockout hole is formed Since both the knockout hole for incoming and outgoing lines and the knockout hole for outgoing lines are provided, it is only necessary to open the knockout holes as required, and there is an effect that labor for processing can be omitted.

Further, the total width of the joints of the second knockout holes is larger than the total width of the joints of the first knockout holes, so that the knockout holes have desired strength. Also, since it has both a knockout hole for incoming and outgoing lines and a knockout hole for outgoing lines,
It is only necessary to open the knockout holes as required, and there is an effect that the labor for processing can be omitted.

The center of the first knockout hole and the second knockout hole
When the center of the knockout hole is the same, a straight line connecting the center and the center of the joint of the first knockout hole, and the center and the second
Since the straight line connecting the centers of the joints of the knockout holes does not coincide with each other, when only the first knockout hole is opened, the impact is hardly transmitted to the joint of the second knockout hole, and the knockout holes are opened in a chain. There is an effect that there is no.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a first embodiment of a knockout hole of a box for storing electrical equipment according to the present invention.

FIG. 2 is an explanatory view of a knockout hole of a box for storing electrical equipment according to a second embodiment of the present invention.

FIG. 3 is an explanatory view of a knockout hole of a box for storing electrical equipment according to a third embodiment of the present invention.

FIG. 4 is an explanatory view of a knockout hole of a conventional electric device housing box.

FIG. 5 is an explanatory view of a knockout hole of a conventional electric device housing box.

[Explanation of symbols]

1,11,21 ... Electric equipment storage box, 2,12,
22 ... box body, 3, 4, 5, 13, 14, 23,
24, 25... First knockout hole, 6, 7, 1
5, 16, 26, 27 ... second knockout hole, 2
8 ... Knockout hole.

Claims (2)

(57) [Claims] 1. A box body having at least an opening,
In an electric device storage box for storing an electric device constituted by a door that covers an opening of the box main body, at least one surface of a side plate or a back plate of the box main body includes a first plate. Forming a knockout hole, forming a second knockout hole including a part or all of the first knockout hole on the same surface as the surface on which the first knockout hole is formed ;
The sum of the widths of the joints of the knockout holes of the second knockout
An electric device housing box, wherein the total width of the joints of the out holes is formed larger . 2. The electric equipment storage box according to claim 1, wherein:
When the center of the knockout hole is the same as the center of the second knockout hole, a straight line connecting the center to the center of the joint of the first knockout hole and a straight line connecting the center to the center of the joint of the second knockout hole 2. The box for storing electrical equipment according to claim 1 , wherein