JPH11308714A - Distribution board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it unnecessary to pass wires through round holes, lay the wires and connect the wires to electrical apparatuses easily and, further, protect the wires drawn into a distribution board from damages. SOLUTION: A distribution board is composed of a box 1, support members 2 and attachment members 3 which are attached to the bottom part 11 of Line box 1, an inner device block 4 which is fixed to the support members 2 by screws to be attached to the bottom part 11 of the box 1, an inner door 5 which is attached to the attachment members 3 and covers the front surface of the inner device block 4, a frame 6 fixed to the box 1 by screws, a door frame 7 fixed to the frame unit 6 by screws and a cover 8 which is turnably supported by the door frame 7 through a support member 9. Among the side parts 12 and 13 of the box 1, one pair of facing side parts 12 are bent toward each other under the other pair of facing side parts 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power distribution board for ceiling installation, which is installed substantially flush with a ceiling material suspended from a ceiling base.

[0002]

2. Description of the Related Art Conventionally, as this kind of distribution board, for example, a ceiling-mounted distribution board described in Japanese Patent Application Laid-Open No. 7-298425 is known. The distribution board is provided with a box housing electric equipment, a U-shaped mounting bracket fixed to a back side of the box, and attached to a suspension bolt from a ceiling base, and a frame of the box. It is constituted by a door which is attached to open and close the opening of the box.

[0003]

However, in the above-described conventional distribution board, a plurality of round holes for inserting electric wires are provided in the side plate of the box, and the electric wires are inserted through each of the round holes and routed to open and close each branch. It has a structure for connection to a container, and requires wire insertion and routing operations, and these operations are particularly troublesome because they are performed at high places.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the need for a conventional operation of inserting an electric wire into a round hole, thereby facilitating the operation of routing the electric wire and connecting to an electric device, and preventing the electric wire from being damaged inside. It is to provide a distribution board that can be used.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a box having a bottom plate to which electric equipment is attached, a side plate standing upright from four rounds of the bottom plate, and a side plate of the box. In a power distribution panel including a frame attached to the front end side of the device and a lid openably and closably attached to the frame, the box includes a pair of opposed side plates of the side plates. One side plate is bent in a direction facing each other on the bottom plate side with respect to another pair of second side plates facing each other, and the frame is attached to the pair of second side plates.

[0006] In this structure, since the first side plate side is open, it is easy to draw the electric wire from the first side plate side to the inside, and it is also easy to route the electric wire and to connect to the electric equipment. Become. In addition, since each first side plate is bent, damage to the electric wire drawn inside can be prevented.

The frame has a flange protruding outward from the opening edge of the box on all sides and a leg connected to the flange and extending along the side plate of the box. A structure in which a pair of second legs corresponding to the pair of second side plates is formed to be longer than a pair of first legs corresponding to the pair of first side plates. May be. According to this structure, when the frame is screwed away from the box in accordance with the size of the electric device, the pair of the second leg and the second leg are used.
The side plates facilitate closing these surfaces.

[0008] The distal ends of the pair of first leg pieces may be bent in the same direction in parallel with the pair of first side plates. According to this structure, since the distal end side of each first leg is also bent, damage to the electric wire drawn into the inside can be more appropriately prevented.

The electric device comprises a main switch and a plurality of branch switches electrically connected to the main switch. Each of these branch switches has an output terminal connected to one of the pair of first side plates. It may be a structure arranged so as to face. According to this structure, the routing and connection of electric wires to the output terminal of each branch switch are facilitated.

Further, each of the second side plates is provided with an insertion hole for a nut to be screwed into a suspension bolt from the base of the ceiling, and communicates with the insertion hole for the nut. A structure in which a bolt insertion hole smaller than the outer diameter of the nut is provided in the bottom plate may be used. In this structure, if a nut screwed into a bolt is inserted into one of the nut insertion hole and the bolt insertion hole of one of the pair of second side plates, one of the second side plates of the box is temporarily fixed. Will be done. This facilitates the work of attaching the box to the suspension bolt.

[0011]

FIG. 1 is an exploded perspective view showing a distribution board according to an embodiment of the present invention, and FIG. 2 is one side (right side) of a pair of opposed sides of the distribution board shown in FIG. FIG. 3 is a cross-sectional view as viewed from one side (the upper side in FIG. 1) of the other pair of opposing sides, and the present embodiment will be described with reference to these figures. Will be described.

This distribution board is used by being installed almost flush with a ceiling material suspended from a ceiling base. The structure of the distribution board will be briefly described. As shown in FIG. 1, a bottom portion (bottom plate) 11 and side portions 12 (first side plate),
13 (second side plate) is formed of a metal plate material such as an iron plate. Note that the tip ends of the pair of side portions 13 are bent in directions facing each other to form a pair of bent portions 131, and each end of each bent portion 131 has a screw S4.
Screw hole 131a is formed. Also, the side 13
Has a through hole 132 for a nut (see N in FIG. 4) screwed into a suspension bolt (see B in FIG. 4 described below) from the ceiling base.
On the other hand, a bolt insertion hole 133 communicating with the insertion hole 132 and being larger than the outer diameter of the suspension bolt B and smaller than the outer diameter of the nut N is formed in the bottom portion 11.

A fixing plate 14 is provided on the inner surface of the bottom 11 of the box 1.
The supporting members 2 are screwed to the left and right ends of the fixed plate 14 with screws S1 (see FIGS. 2 and 3). An attachment member 3 is screwed to each end in the longitudinal direction on the outer surface of each of the support members 2 with a screw S2, and the left and right ends of the inner unit block 4 are respectively provided on the front surfaces of the left and right support members 2. Is screwed with a screw S3.

The inner unit block 4 includes, as electric equipment, a main switch 41 for a single-phase three-wire, for example, and a plurality of branch switches whose output terminals are electrically connected to input terminals via conductive bars. 42 is attached, and an unillustrated electric wire wired in advance is connected to the input terminal of the main switch 41 and the output terminal of each branch switch 42. As described above, in the present embodiment, the inner unit block 4 includes the fixing plate 14 and the support member 2.
And is attached to the bottom 11 of the box 1 via the. Each branch switch 42 is arranged so that this output terminal faces one of the pair of side parts 12.

The front surface of the inner unit block 4 is closed by a rectangular inner door 5, and the inner door 5 is formed with an engagement hole 51 at a position corresponding to each mounting member 3. The inner door 5 is detachably attached to the box body 1 by engaging the claw at the front end of the attachment member 3 corresponding to each of the engagement holes 51.

In the box 1 to which the inner unit block 4 and the inner door 5 are attached, a frame 6 is provided with screws S4 near each of the four corners.
It is structured to be screwed. That is,
The frame 6 has a flange 61 projecting outward from the opening edge of the box 1 on all sides, and is connected to the flange 61 to form the side 1 of the box 1.
And leg pieces 62 (first leg pieces) and 63 (second leg pieces) extending along the lines 2 and 13, respectively.
3, a pair of leg pieces 63 corresponding to the pair of side portions 13.
Are formed to extend longer than the pair of leg pieces 62 corresponding to the pair of side portions 12. Further, the distal ends of the pair of leg pieces 62 are bent in the directions facing each other to form a pair of bent portions 62.
1 are formed, and at each end of each bent portion 621, an insertion hole 621a for inserting the screw S4 is formed, and near the inside of both insertion holes 621a, a screw hole 621b for the screw S5 is formed. Have been.

The frame 6 screwed to the box 1 has
The door frame 7 is screwed to each bent portion 621 near each of the four corners by screws S5, and an edge piece extending to the box body 1 over substantially the entire periphery is formed at the right end of the door frame 7. Lid 8
Are pivotally supported by two pivot members 9.

Next, the operation of the structure of the distribution board will be described. Of the side portions 12 and 13 of the box 1, a pair of opposing side portions 12 is more than a pair of other opposing side portions 13. Since the bottom portion 11 is bent in a direction facing each other, each side portion 12 is opened as shown in FIGS. 1 and 2. This eliminates the conventional work of inserting wires into round holes, simplifies wiring and connection to electrical equipment, and prevents damage to wires drawn into the distribution board. The Rukoto.

Further, of the leg pieces 62 and 63, a pair of leg pieces 63 corresponding to the pair of side parts 13 is formed to extend longer than a pair of leg pieces 62 corresponding to the pair of side parts 12, FIG.
As shown in the figure, since each leg 63 covers a part of the outer surface of the corresponding side portion 13, when the frame 6 is screwed to the box 1, the frame 6 is attached to the box 1. On the other hand, since it does not shift in the left-right direction, the work of screwing the frame 6 to the box 1 becomes easy.

Further, since the tip ends of the pair of leg pieces 62 are bent in the direction facing each other to form a pair of bent portions 621, damage to the electric wire drawn into the distribution board is more preferably prevented. Is done.

Each branch switch 42 is arranged such that its output terminal faces one of the pair of side portions 12, so that
The routing and connection of electric wires to each branch switch 42 are facilitated.

Further, while an insertion hole 132 is formed in the side portion 13, a bolt insertion hole 133 communicating with the insertion hole 132 is formed in the bottom portion 11, so that the left and right side portions 13 of the box 1 are formed. The nut N screwed to the bolt B is inserted into any one of the insertion holes 132 and the bolt insertion holes 133.
Is inserted and hooked on each of these nuts N, so that one of the left and right side portions 13 of the box 1 is temporarily fixed. This facilitates the work of attaching the box 1 to the suspension bolts B.

FIG. 4 is a perspective view showing how the box 1 is mounted on the ceiling base. FIG. 5 is a view showing the distribution board installed almost flush with a ceiling material suspended from the ceiling base. With reference to the drawings, the construction procedure of the switchboard will be briefly described below with reference to these drawings. However, the bolt holes 1
It is assumed that the suspension bolt B is attached in advance to a position corresponding to 33.

First, nuts N are temporarily screwed into two suspension bolts B corresponding to the respective bolt insertion holes 133 on either one of the left and right sides 13 of the box 1.

Next, each of the temporarily screwed nuts N and the suspension bolts B is inserted into the corresponding insertion hole 132 and the corresponding bolt insertion hole 133 so that either one of the left and right side portions 13 of the box 1 is moved. Hook and temporarily fix.

Next, the corresponding suspension bolts B are inserted into the respective bolt insertion holes 133 on the other side of the left and right side portions 13, and the nuts N are temporarily screwed. As a result, the box body 1 is
Temporarily attached to G.

Next, the frame 6 is attached to the box 1 by four screws S4.
Then, as shown in FIG. 5, each nut N is screwed (mainly screwed) until the flange 61 of the frame 6 is substantially flush with the ceiling material CM. The inner unit block 4 may be attached to the box 1 via the support member 2 at any time before or after the main screwing. However, in the present embodiment, the support member 2 and the attachment are attached to the box 1. The member 3 is screwed in advance, and the inner unit block 4 is screwed in advance.

Next, the door frame 7 is screwed to the frame 6 near each of the four corners with screws S5.
The lid 8 is pivotally supported by two pivot members 9 at the right end of the frame.
As a result, the lid 8 is attached to the frame 6 via the door frame 7 and the pivot member 9 so as to be openable and closable, and as shown in FIG. 5, the installation of the main distribution board on the ceiling is completed.

As described above, according to the present embodiment, it is not necessary to insert a wire into a conventional round hole, thereby facilitating the routing of the wire and the connection to an electric device. Can be prevented.

[0030]

As is apparent from the above, according to the first aspect of the present invention, there is no need for the conventional operation of inserting an electric wire into a round hole, and the operation of routing the electric wire and connecting the electric wire to electric equipment, etc. Can be easily performed, and damage of the electric wire drawn into the inside can be prevented.

According to the second aspect of the present invention, the pair of second
The leg piece and the second side plate can facilitate closing of these surfaces.

According to the third aspect of the invention, it is possible to more suitably prevent damage to the electric wire drawn into the inside.

According to the fourth aspect of the present invention, it is possible to easily route and connect the electric wire to the output terminal of each branch switch.

According to the fifth aspect of the invention, it is possible to easily attach the box to the suspension bolt.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a distribution board according to an embodiment of the present invention.

2 is a cross-sectional view of one side of a pair of opposing sides of the distribution board shown in FIG.

FIG. 3 is a cross-sectional view of another side of a pair of opposite sides of the distribution board shown in FIG. 1 as viewed from one side.

FIG. 4 is a perspective view showing how a box is attached to a ceiling base.

FIG. 5 is a diagram showing a state of the distribution board installed substantially flush with a ceiling material suspended from a ceiling base.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box 11 Bottom part 12, 13 Side part 131 Bent part 131a Screw hole 132 Insertion hole 133 Bolt insertion hole 14 Fixed plate 2 Support member 3 Mounting member 4 Inner unit block 41 Main switch 42 Branch switch 5 Branch door 51 Mating hole 6 Frame body 61 Flange piece 62, 63 Leg piece 621 Folded part 621a Insertion hole 621b Screw hole 7 Door frame 8 Lid 9 Pivot member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiromitsu Takamoto 1048 Odakadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (5)

[Claims] 1. A box having a bottom plate to which an electric device is attached, a side plate standing upright from four sides of the bottom plate, a frame attached to a tip end of a side plate of the box, and this frame And a lid body openably and closably attached to the box body, wherein the box body is such that, of the side plates, a pair of opposed first side plates is a bottom plate more than another pair of opposed second side plates. A power distribution panel characterized by being bent in directions facing each other on the sides, and the frame body being attached to the pair of second side plates. 2. The frame body has a flange piece projecting outward from the opening edge of the box body in all directions, and a leg piece connected to the flange piece and extending along a side plate of the box body. A pair of second leg pieces corresponding to the pair of second side plates may be formed to be longer than a pair of first leg pieces corresponding to the pair of first side plates. The distribution board according to claim 1, characterized in that: 3. The distribution board according to claim 2, wherein the front ends of the pair of first leg pieces are bent in the same direction in parallel with the pair of first side plates. 4. The electric device includes a main switch and a plurality of branch switches electrically connected to the main switch. Each of the branch switches has an output terminal connected to the pair of first switches.
The distribution board according to any one of claims 1 to 3, wherein the distribution board is arranged so as to face one of the side plates. 5. Each of the second side plates is provided with an insertion hole for a nut to be screwed into a suspension bolt from a ceiling base, and communicates with the insertion hole for the nut, and is larger than an outer diameter of the suspension bolt. The distribution board according to claim 1, wherein a bolt insertion hole smaller than an outer diameter of the nut is provided in the bottom plate.