JP3179983B2 - Switchboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried type distribution board used in ordinary households.

[0002]

2. Description of the Related Art In general, this type of distribution board has a plurality of branch breakers arranged side by side with the terminals of each branch breaker oriented vertically. The applicant of the present application also discloses JP-A-6-153337.
As shown in the figure, an inner unit fixing plate in which a plurality of branch breakers are mounted so as to be arranged side by side in the horizontal direction is proposed which is fixed to both sides of an opening edge of a lower box.

[0003] In this device, an elongated hole provided in an inner unit fixing plate is aligned with screw holes provided on both sides in the horizontal direction of an opening edge of the lower box, and the inner unit fixing plate is fixed to the lower box by screws. And
The upper lid is attached to the inner unit fixing plate so that the window hole of the upper lid corresponds to the operation handle of each breaker. On the other hand, in the case of a distribution board used in factories, workshops, etc., an inner unit fixing plate in which a plurality of branch breakers are arranged vertically is attached to the bottom plate of the lower box,
An inner lid having a window for projecting the operation handle of each branch breaker is attached to the inner unit fixing plate. Then, the inner lid and the upper lid for closing the opening surface of the wall are attached to the lower box or the inner unit fixing plate.

[0004]

According to the distribution board for household use, the branch breakers are arranged side by side. Therefore, when the number of branch circuits increases, the number of branch breakers increases and the distribution board becomes horizontal. The width of the lower box becomes wider. For this reason,
When burying in a wall, there is a problem that pillars need to be cut and the relocation work is troublesome.

[0005] Further, in a distribution board used in a factory, a work place, or the like, the branch breakers are arranged vertically, so that even if the number of branch circuits is increased, the lower box is not widened. Can be accommodated by increasing the vertical width. However, in order to apply this as a distribution board used for ordinary households, an extra member called an inner lid was required. Furthermore, in order to make the inner lid a general household upper lid using this technology, the inner lid must be kept at a constant distance from the bottom plate of the lower box in order to cover the opening surface of the wall. When the distance to the direction is shifted, there is a problem that the inner lid cannot be attached.

Therefore, an object of the present invention is to reduce the necessity of shaving a pillar when embedding in a wall even if the number of breakers is increased, thereby facilitating the embedding work and displacing the distance of the lower box in the depth direction of the wall. It is another object of the present invention to provide a distribution board which makes it easy to attach an upper cover.

[0007]

According to a first aspect of the present invention, there is provided a power distribution panel, wherein a lower box for mounting on a wall having a screw hole formed at one of both side edges and one of upper and lower edges of an opening edge is overlapped with the opening edge. An inner unit fixing plate housed in the lower box having a mounting portion formed with a mounting hole aligned with the screw hole on the side, and screwed into the screw hole through the mounting hole to mount the mounting member. A screw for mounting the unit to the lower box, a plurality of branch breakers vertically arranged on the inner unit fixing plate, each terminal of which is oriented in a horizontal direction, and a window hole for projecting operation handles of these branch breakers. And an upper lid attached to the inner unit fixing plate so as to open and close the opening of the lower box.

According to a second aspect of the present invention, there is provided a switchboard according to the first aspect.
An input / output line portion is provided on the other side wall of the upper and lower edges of the lower box. According to a third aspect of the present invention, in the power distribution panel according to the first or second aspect, the mounting holes aligned with one of the screw holes on the upper and lower edges are elongated holes, and the mounting holes are aligned with the screw holes on both side edges. The hole is a slanted oblong hole that can rotate around the elongate hole.

[0009]

According to the distribution board of the first aspect, the lower box is disposed between the pillars of the wall, and the plurality of branch breakers are disposed on the inner unit fixing plate so as to be arranged in a vertical direction. Align the mounting holes of the inner unit fixing plate with the screw holes of the lower box and mount them with screws, and then attach the upper lid to the inner unit fixing plate. Therefore, even if the number of branch circuits increases, the number of branch breakers can be increased in the vertical direction, and the horizontal direction of the lower box is not widened. In addition, the embedding work becomes easier, and the upper lid can be easily attached even if the distance of the wall of the lower box in the depth direction is shifted.

According to the second aspect of the present invention, the input / output line portion is provided on the other side wall of the upper and lower edges of the lower box. Does not overlap with the mounting part of the inner unit mounting plate, so that the mounting part of the inner unit mounting plate does not interfere with the wiring operation of the wire conductor, thereby facilitating the wiring operation of the wire conductor. According to the distribution board of claim 3, in claim 1 or claim 2, the mounting hole matching one of the screw holes of the upper and lower edges is an elongated hole, and is matched with the screw holes of the both side edges. Since the mounting hole is a slanted oblong hole rotatable about the oblong hole, in addition to the operation of claim 1 or 2, an oblong hole of the inner unit fixing plate is provided in one of the screw holes on the upper and lower edges. In the temporary fixing state where the screw is screwed into the screw hole so that the head of the screw does not abut on the long hole by overlapping, the oblique long hole can be aligned with the screw hole of the lower box and fixed with the screw Therefore, the positioning of the inner unit fixing plate with respect to the lower box can be easily performed.

[0011]

An embodiment of the present invention will be described with reference to FIGS. That is, the distribution board includes the lower box 1, the inner unit fixing plate 2, the branch breaker 3, and the upper lid 4. The lower box 1 is embedded in a wall 10 as shown in FIG. 13, and has screw holes 7 and 8 formed in both side edges 5 at the opening edge and a lower edge 6 which is one of the upper and lower edges. . The lower box 1 of the embodiment is made of metal and is formed in a vertically long shape. The opening edge has a width capable of supporting the inner unit fixing plate 2 and forming the screw holes 7 and 8, and the inner end side thereof faces inward. To form a folded portion 11. Also, not only the input / output wire portions 9 'of the upper edge side plate facing the lower edge portion 6 having the screw holes 8 in the vertical direction of the lower box 1 but also the input / output wire portions 9 of all the other three side plates of the lower box 1 are provided. Is provided. The screw holes 7 and 8 are formed in pairs.

The inner unit fixing plate 2 is provided in the lower box 1 with mounting portions 14 and 14 ′ formed on the sides thereof and formed with mounting holes 12 and 13 which are overlapped on the opening edges and are aligned with the screw holes 7 and 8. Is housed. The inner unit fixing plate 2 of the embodiment includes a main unit unit 15,
It is composed of a branch unit 16. The main unit 15 has a substantially inverted U-shape as seen in FIG. 5 when viewed in plan, and the mounting portions 14 extend outward from both sides. The main unit 15 is provided with a main breaker mounting portion 1 on its bottom surface.
6 and electrical equipment mounting holes 17 are provided, and a branch unit connecting portion 18 is provided at the lower end of the bottom surface. A main breaker 19 is mounted on the main breaker mounting portion 16, and a metal mounting piece 20 is mounted on the electric device mounting hole 17. The mounting piece 20 is formed by bending the side plate 20b up and down, bending its tip outward, and engaging the edge of the electrical equipment mounting hole 17.
0c is formed, and is attached to a screw hole 20d formed at the edge of the electric device mounting hole 17 with a screw 20a through a hole formed in the engaging piece 20c. A wooden mounting plate 21 to which an electric device (not shown) such as a limiter is mounted is mounted on the inner bottom surface of the mounting piece 20. When a limiter or the like is mounted on the mounting plate 21, the input power supply line is connected to the electric equipment, and the input terminals 19'a to 19'c of the main breaker 19 are connected to the load side of the electric equipment. .

A holding frame 22 is provided at the upper end of the main unit 15. This holding frame 22 has a leg 24 at one end of the holding frame 22 hinged to a side plate 15 a of the main unit 15 by a hinge 23, and a leg 25 at the other end of the main unit 15 via a height adjusting member 26. Screw 22a on the bottom
It is screwed by. A retaining piece 57 is provided on the holding frame 22.
And a mounting hole 56 are formed.

Next, as shown in FIG. 4, the branching unit 16 comprises a pair of frames 29, a bar fixing base 30 located between the frames 29, and a lower end mounting portion 14 '. The frame 29 is formed of a vertically long rectangular plate and has mounting holes at the upper and lower ends, and the upper end is attached to the connecting portion 18 of the main unit 15 by connecting screws 31. The lower end of the frame 29 is connected to the mounting portion 14 ′ by a connecting screw 32. As shown in FIG. 10, a pair of voltage bars 38 are arranged side by side on the bar fixing base 30 in a vertical position.
A neutral bar 39 is disposed at a position higher than 0 in parallel with the voltage bar 38. Reference numeral 43 (for example, FIG. 7) denotes a bar cover that covers the voltage bar 38 and the like, which is retained by the fixing claws 30a (FIG. 6) of the bar fixing base 30. 30b is a bar support.

The mounting portion 14 of the inner unit fixing plate 2 which is mounted on both side edges of the opening edge of the lower box 1 has a rising portion 33 extending from the side plate 15a of the main unit unit 15, and the rising portion 33 It extends over the opening edge of the lower box 1 and engages with both side edges of the opening edge. The mounting portion 14 'of the inner unit fixing plate 2 which is mounted on the lower edge 6 of the opening edge of the lower box 1 is bent in a substantially Z-shape to connect the pair of frames 29 in one piece and to connect the other piece to the opening edge. The middle step portion is engaged with the lower edge portion 6 to form a rising portion 33. Further, the mounting portion 14 'is formed with a locking piece 57 for mounting the upper lid and a mounting hole 56 which are to be fixed to the upper lid 4 so as to face the fixed portion of the holding frame 22.

The mounting hole 13 of the mounting portion 14 'is a screw hole 8
In the embodiment, a large hole 13 ′ is formed continuously with the hole 13. Mounting hole 12 of mounting portion 14
Are a pair of long holes respectively aligned with the pair of screw holes 7, but are formed as oblique long holes 12a and 12b in which the inner unit fixing plate 2 can rotate around the mounting hole 13, and the pair of mounting holes 12 are on both sides. They are formed symmetrically with respect to the center of the edge. The oblong hole 12b forms a large-diameter hole 12 'continuous with the oblong hole 12b. As shown in FIG. 9, the screw 34 screwed into the screw holes 7, 8 has an outer shape whose head is smaller than the width of the mounting holes 12, 13 and has a neck portion larger than the width of the mounting holes 12, 13. A washer 36 is provided. The head of the screw 35 has an oblong slot 1
2b and holes 13 ', 1
It has a diameter smaller than the inner diameter of 3 '. Inner unit fixing plate 2
When fixing to the lower box 1, screw 3
4, the screw 35 is temporarily screwed, and the large-diameter holes 12 ', 13' of the inner unit fixing plate 2 are passed through the head of the screw 35, and at the same time, the mounting hole 13 and the inclined oblong hole 12a are screwed into the screw 34. Then, the inner unit fixing plate 2 is moved while the mounting hole 13 and the oblong elongated hole 12a are guided by the head of the screw 34 so that the head of the screw 35 is attached to the mounting hole 13 and the oblique length. After moving to the hole 12b, the screw 35 is tightened and fixed. FIG. 8 shows a temporarily fixed state, in which the inner unit fixing plate 2 is inclined.
Is pivoted on the fulcrum, and the oblong slot 12 is
a and 12b are moved to move the inner unit fixing plate 2 to the position shown in FIG.
Then, the screws 34 and 35 are tightened and the mounting portion 14 is mounted on the lower box 1 in a state where the posture is corrected as shown in FIG.

A plurality of branch breakers 3 are arranged in parallel in the vertical direction on the internal unit fixing plate 2, and each of the terminals 3a, 3b and the like is oriented in the horizontal direction. In the embodiment, each frame 29 has one
A number of branch breakers 3 are mounted in a row. Further, the voltage bar 38 and the neutral bar 39 of the bar fixing base 30 between the frames 29 and the input terminals 3 a ′ and 3 of the branch breaker 3.
b 'and is connected to the voltage bar 38 and the neutral bar 3
9 and the output terminals 19a to 19c of the main breaker 19.
19a is connected via feed bars 40-42. As shown in FIG. 6, the feed bars 40 to 42 are formed by bending both ends of a substantially U-shaped strip-shaped conductive plate in opposite directions to each other, and have step bending portions 40c at one ends 40a to 42a.
To 42c and one end 40a to 42a and the other end 40b.
, And one end 40a-42a is connected to the output terminal 19a-19c of the main breaker 19, and the other end 40b-42b is connected to the upper end of the voltage bar 38 and the neutral bar 39. They are connected by connection screws 38a and 39a. 3a and 3b are output terminals of the branch breaker 3.

The upper lid 4 has a window (not shown) through which the operating handle 44 of the branch breaker 3 projects, and is attached to the inner unit fixing plate 2 so that the opening of the lower box 1 can be opened and closed. The upper lid 4 of the embodiment is made of synthetic resin and has a door 4a for opening and closing a window hole.
The upper lid 4 has an attachment 58 and is attached to the attachment hole 56 and the locking piece 57. This attachment 58 is shown in FIG.
, A horizontal shaft 59 attached to the upper lid 4, an operation lever 60 rotatably attached to the horizontal shaft 59, a hook-shaped stopper piece 61 attached to the back side of the operation lever 60, And a locking hole 62 that engages with the locking piece 57. As shown by the imaginary line in FIG. 14, the locking hole 60 is fitted to the locking piece 57 with the operating lever 60 opened, and the locking piece 61 enters the mounting hole 56 by closing the operating lever 60. The key 61a at the tip of the retaining piece 61 is attached to the mounting hole 56.
Is locked to the back surface side of the hole edge portion, and becomes a retaining state, and thereby becomes an attached state. Reference numeral 60a denotes a locking hook for holding the closed state of the operation lever 60, which is elastically and removably locked in a locking hole 60a 'formed in the upper lid 4. Reference numeral 60b denotes a stopper that regulates the closing position of the operation lever 60.

According to this embodiment, the lower box 1 is arranged between the pillars (not shown) of the wall 10, and the plurality of branch breakers 3 are arranged on the inner unit fixing plate 2 in the vertical direction. The mounting holes 12, 13 of the inner unit fixing plate 2 are screw holes 7, 8 of the lower box 1.
Then, the upper cover 4 is attached to the inner unit fixing plate 2 by screws 34 and 35. Therefore, even if the number of branch circuits increases, the number of branch breakers 3 can be increased in the vertical direction, and the horizontal direction of the lower box 1 is not widened. There is little need to sharpen,
The embedding work becomes easy, and even if the distance to the depth direction of the wall of the lower box 1 is shifted, the upper lid 4 can be easily attached.

The input / output line portion 9 'is provided on the side wall of the upper edge of the lower box 1.
Is provided, the wire does not overlap with the mounting portion 14 'of the internal unit mounting plate 2 by passing through the input / output line portion 9'.
4 'does not become an obstacle, thereby facilitating the work of inputting and outputting the electric wire conductor. Further, the mounting holes 13 aligned with the screw holes 8 of the lower edge 6 are elongated holes, and the mounting holes 12 aligned with the screw holes 7 on both side edges are inclined oblong holes rotatable about the mounting hole 13. In the temporary fixing state, the screw 34 is screwed into the screw hole 7 so that the long hole of the inner unit fixing plate 2 is overlapped with the screw hole 8 of the edge 6 so that the head of the screw 35 does not contact the mounting hole 13. Since the mounting hole 12 of the oblong hole can be aligned with the screw hole 7 of the lower box 1 and fixed by the screw 35, the positioning of the inner unit fixing plate 2 with respect to the lower box 1 can be easily performed.

In addition, since wire conductors (not shown) for wiring are inserted from the input / output wire portions 9 and 9 'of one side plate of the lower box 1, and then the holding frame 22 is attached to the inner unit fixing plate 2, so that wiring work can be performed. It is easy and the wiring is held between the holding frame 22 and the bottom plate of the lower box 1 or the bottom plate of the internal unit fixing plate 2, and the upper lid 4 is on the opening side of the lower box 1 opposite to the wiring. Since the fixing tongue piece 57 and the mounting hole 56 of the fixing portion 22 are fixed, even if the wiring is bent, the lifting is restricted by the holding frame 22 and the upper lid 4 is less likely to be pushed up, so that the upper lid 4 is in a stable state. Can be installed with

Furthermore, since one end of the holding frame 22 is hinged and the other end is screwed, the holding frame 22 is rotated about one end of the holding frame 22 to break the wire conductor with the other end opened. After the connection, the holding frame 22 is fixed by screwing the other end, and the upper lid 4 can be fixed to the fixing portion of the holding frame 22, so that the attachment operation of the holding frame 22 is facilitated.

Further, since the feed bars 40 to 42 are formed of substantially U-shaped flat long plates, and both ends are bent in opposite directions in the plate thickness direction with the U-shaped portion as the center, the branch breaker 3 is formed.
Since the central portions of the feed bars 40 to 42 disposed on the side surfaces of the main plate are disposed in the thickness direction of the long plate, the space between the main breaker 19 and the branch breaker 3 can be reduced, and the size can be reduced.

At least two feed bars 40 to 42 are arranged side by side, and one end portions 40a to 42a and the other end portions 40b to 42b of adjacent feed bars 40 to 42 are respectively arranged in parallel with each other. Since the central portions are opposite to each other, when one end portions 40a to 42a of the feed bars 40 to 42 are connected to the main breaker 19,
Since the center portions of the feed bars 40 to 42 are bent in opposite directions, insulation between the center portions of one feed bar and the center portion of the other feed bar is secured without reducing the distance between them. However, the height of the central portion of the entire feed bars 40 to 42 can be reduced.

Further, one end 40a of the feed bars 40 to 42
To 42a are step bent portions 40c to 4 bent toward the center.
2c, the height of the central portion of the feed bars 40 to 42 can be reduced, and the feed bars 40 in the depth direction of the lower box 1 can be reduced.
The size of ~ 42 is reduced, and the size can be further reduced. An electric device mounting hole 17 is drilled in the inner unit fixing plate 2, and a mounting piece 20 having a mounting portion 20 c to be mounted on an edge of the electric device mounting hole 17 is inserted into the electric device mounting hole 17.
Mounting plate 2 having different heights
0 and a mounting piece 20 to be inserted into the electrical equipment mounting hole 17.
By selecting, various electric devices having different heights can be supported.

Although the main breaker 19 is fixed to the internal unit fixing plate 2 in this embodiment, the main breaker 19 may be provided separately from the internal unit fixing plate 2 in the present invention. In the embodiment, the screw 8 is provided on the lower edge 6 of the lower box 1, but may be provided on the upper edge.

[0027]

According to the power distribution board of the first aspect, the lower box is disposed between the pillars of the wall, and the plurality of branch breakers are disposed on the inner unit fixing plate so as to be arranged in a vertical direction. Then, the mounting holes of the inner unit fixing plate are aligned with the screw holes of the lower box, and the inner unit fixing plate is attached with screws. Therefore, even if the number of branch circuits increases, the number of branch breakers can be increased in the vertical direction, and the lower box is not widened in the horizontal direction.
When burying in the wall, there is little need to grind the pillars, so that the burying operation is easy, and even if the distance of the lower box in the depth direction of the wall is shifted, it is easy to attach the upper lid.

According to the power distribution board of claim 2, in claim 1, the input / output line portion is provided on the other side wall of the upper and lower edges of the lower box. Does not overlap with the mounting part of the inner unit mounting plate, so that the mounting part of the inner unit mounting plate does not interfere with the wiring operation of the wire conductor, thereby facilitating the wiring operation of the wire conductor. According to the distribution board of claim 3, in claim 1 or claim 2, the mounting hole matching one of the screw holes of the upper and lower edges is an elongated hole, and is matched with the screw holes of the both side edges. Since the mounting hole is an oblong hole that can rotate about the long hole, in addition to the effects of claim 1 or 2, a long hole of the internal unit fixing plate is provided in one of the screw holes on the upper and lower edges. In the temporary fixing state where the screw is screwed into the screw hole so that the head of the screw does not abut on the long hole by overlapping, the oblique long hole can be aligned with the screw hole of the lower box and fixed with the screw Therefore, the positioning of the inner unit fixing plate with respect to the lower box can be easily performed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a lower box is closed by an upper lid.

FIG. 3 is a front view of a state in which an upper lid is removed.

FIG. 4 is a perspective view showing a main unit unit and a branch unit unit.

FIG. 5 is an exploded perspective view showing a main unit of the inner unit fixing plate.

FIG. 6 is an exploded perspective view showing a main breaker, a bar connection table, and a feed bar.

FIG. 7 is a front view showing a state where a bar cover is attached.

FIG. 8 is a front view of the inner unit fixing stand in a temporarily attached state.

FIG. 9 is a sectional view of a mounting portion.

FIG. 10 is a front view showing a connection state of a feed bar.

FIG. 11 is a sectional view taken along line AA of FIG. 10;

FIG. 12 is a partially enlarged view of a connection portion between a feed bar and a branch breaker.

FIG. 13 is a partial sectional view of a state where the lower box is embedded in a wall.

FIG. 14 is a sectional view of a mounting structure of the upper lid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower box 2 Inner unit fixing stand 3 Branch breaker 3a ', 3b' Input side terminal 4 Upper lid 5 Both side edges 6 Lower edge 7,8 Screw hole 9 I / O wire 12,13 Mounting hole 14,14 'Mounting portion 34, 35 Screw 44 Operation handle

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02B 1/40-1/42

Claims (3)

(57) [Claims] 1. A wall mounting lower box having a threaded hole formed at one of both side edges and one of upper and lower edges of an opening edge, and a mounting formed with a mounting hole which is overlapped with the opening edge and is aligned with the screw hole. An inner unit fixing plate housed in the lower box having a portion on a side portion, a screw passing through the mounting hole and screwing into the screw hole to mount the mounting portion to the lower box, A plurality of branch breakers vertically arranged on the fixing plate, each terminal of which is oriented in the horizontal direction, and a window hole for projecting the operation handles of these branch breakers, so that the opening of the lower box can be opened and closed. A distribution board comprising an upper lid attached to an inner unit fixing plate. 2. The distribution board according to claim 1, wherein an input / output line is provided on the other side wall of the upper and lower edges of the lower box. 3. The mounting hole, which is aligned with one of the screw holes on the upper and lower edges, is an elongated hole, and the mounting hole, which is aligned with the screw holes on both side edges, is rotatable about the elongated hole. The distribution board according to claim 1 or 2, wherein the distribution board is a long hole.