JP3160506B2 - 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 distribution board applied to general households and the like.

[0002]

2. Description of the Related Art FIG. 15 shows a conventional example. That is, this distribution board is provided at an intermediate portion 101 of an L-shaped feed bar 100 that connects a main breaker (not shown) and a main bar (not shown) connected to a branch breaker (not shown). A plane is formed perpendicularly to the bottom of the box (not shown) as shown in the figure, one end 102 is connected to the output terminal of the main breaker, and the other end 103
Is connected to the main bar. Also feed bar 10
An insulation cover 104 is attached to insulate between the intermediate portions 101 of the “0”.

[0003]

In this distribution board, the plane of the intermediate portion 101 of the feed bar 100 is perpendicular to the bottom of the box. However, if the interval is reduced, an insulating cover for insulating the feed bars 100 from each other is provided. There was a drawback that 104 was required.
Further, when the interval between the intermediate portions 101 of the feed bar 100 is increased, there is a disadvantage that the box itself becomes larger.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a distribution board which can provide a sufficient spacing between the feed bars without increasing the size of the box and without requiring an insulating cover. is there.

[0005]

According to a first aspect of the present invention, there is provided a distribution board having a box and three-pole input / output terminals at both ends, which is attached to the bottom of the box, and a central input terminal is provided with an electric circuit. A main breaker connected to a neutral line and input terminals on both sides connected to a voltage line of an electric circuit, a plurality of branch breakers attached to the bottom of the box alongside the main breaker, and an arrangement of these branch breakers A main bar connected to an input terminal of the branch breaker and arranged three at the bottom of the box along the direction, and a feed bar connecting the output terminal of the main breaker and the main bar, Among the feed bars, the feed bar on the voltage side connected to the output terminals on both sides of the main breaker has a middle plane perpendicular to the bottom of the box, and is connected to the center output terminal of the main breaker. The neutral feed bar is Plane The inter is characterized in that it is located away from the bottom than the feed bar of the voltage-side parallel to the bottom of the box body.

According to the power distribution board of the first aspect, the main breaker and the branch breaker are connected through the feed bar and the main bar. In this case, the plane of the middle part of the feed bar on the voltage side is perpendicular to the bottom of the box, and the plane of the middle part of the feed bar on the neutral side is parallel to the bottom of the box and is higher than the feed bar on the voltage side. Is also separated from the bottom, so that the insulation interval between the intermediate portions of the feed bar can be wider than before, and the box can be reduced in size, and unnecessary members such as an insulating cover are unnecessary. .

According to a second aspect of the present invention, there is provided a switchboard according to the first aspect.
The box body is provided with an insulating portion that partitions an intermediate portion of the voltage-side feed bar and an intermediate portion of the neutral-side feed bar. According to the distribution board of the second aspect, in addition to the effect of the first aspect, the insulation between the feed bars can be more reliably achieved by the insulating portion.

According to a third aspect of the present invention, in the first or second aspect, an upper portion of the intermediate portion of the voltage-side feed bar is covered with an intermediate portion of the neutral-side feed bar. According to the distribution board of the third aspect, in addition to the effects of the first or second aspect, even if an operator attempts to touch the intermediate portion of the feed bar, the distribution board is connected to the central output terminal of the main breaker. Only the neutral side feed bar can be touched, and it is hard to receive an electric shock, so safety can be achieved.

According to a fourth aspect of the present invention, there is provided a distribution board according to the third aspect.
The height of the insulating portion is higher than the height of an intermediate portion of the feed bar on the voltage side. According to the distribution board of claim 4, in addition to the effect of claim 3, even if the neutral side feed bar is deformed to the voltage side feed bar side, the neutral side feed bar hits the insulating part, The contact of the feed bar on the side becomes difficult, and the possibility of a short circuit is reduced.

[0010] The distribution board according to claim 5 is based on claim 3,
The insulating portion is in contact with the center side feed bar. According to the distribution board of the fifth aspect, in addition to the effect of the third aspect, the feed bar on the neutral side is less likely to be deformed toward the feed bar on the voltage side.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. That is, the distribution board includes a main breaker 1, main bars 2a to 2c, branch breakers 3, feed bars 4a to 4c, and a box 8.
First, the box body 8 includes the bar support members 1 of the main trunk bars 2 to 2c.
In order to mount 9, a main breaker 1 and a branch breaker 3 are mounted and mounted on the wall of a building. This box 8
Has a pair of locking portions 71 and 72 whose bases are protruded from the bottom and whose tips protrude in opposite directions. The locking portion 71 is provided integrally with the mounting portion 62 of the branch breaker 3. The mounting table 62 is formed in a streak shape in the horizontal direction of the bottom portion 7 of the box body 8, has a plurality of fitting recesses 70 formed on its side surface, and has a locking portion 71 formed inside these fitting recesses 70. ing. Locking part 72
Is formed by forming a protruding portion on the bottom portion 7 of the box body 8 facing the locking portion 71 and forming a recess on the surface facing the locking portion 71.

In order to support the branch breaker 3, there are provided substantially L-shaped hooks 51 and 52 projecting upward from the bottom 7 of the box 8 and extending upward (in the direction of the arrow). Mounting portions 59 and 62 projecting from the
Has a mounting hole 63 (FIG. 11) formed in the hole. Hook 5
The hooks 51 and 52 have a plurality of guide tapers 53 on the bottom 7 side for guiding hooks 54 and 57 to be described later. In addition, the mounting portions 59 and 62 are
52, a plurality of mounting portions 59 are formed in a conical trapezoidal shape, and a mounting hole 63 is formed in the center. The mounting hole 63 may be formed with a female screw in advance, or may be formed by tapping by screwing the screw 27. The mounting portion 62 is formed integrally with the pair of hook portions 52.

The box 8 is formed such that a wiring opening 10 is formed in the upper part and the bottom part 7 by breaking a knockout plate. Reference numeral 11 denotes a mounting hole, and 12 denotes a cover locking portion for locking the cover 9 detachably. The cover 9 for covering the box 8 has a hole 43 through which the handles 1a, 3a of the main breaker 1 and the branch breaker 3 pass.

The main breaker 1 has three input / output terminals 5,
6 are attached to the bottom 7 of the box body 8 at both ends, and the central input terminal 5 is connected to the neutral line of the electric circuit, and the input terminals 5 on both sides are connected to the voltage line of the electric circuit. The main breaker 1 is disposed on the left side of the box 8 as viewed from the front,
The mounting plate 13 is mounted on the box body 8 with screws 15. The three-pole input terminal 5 of the main breaker 1 is provided at the upper end near the wiring opening 10, and the three-pole output terminal 6 is provided at the lower end.

Three main bars 2a to 2c are arranged at the bottom 7 of the box 8 along the direction in which the branch breakers 3 are arranged, and are connected to the input terminals 23 of the branch breakers 3. That is, three main bars 2a to 2c are arranged on the side of the main breaker 1 so as to be orthogonal to the side surface 16 of the main breaker 1 and extend in the longitudinal direction of the mounting portion 62. The central bar 2b of the main bars 2a to 2c is the other bar 2a,
2c, it is arranged higher in the direction away from the bottom 7 and the bars 2a, 2c on both sides are stepped from each other,
c is lower than the center bar 2b but higher than the bar 2a. The bars 2a and 2c are voltage bars and are formed in a strip shape. The bars 2b are neutral bars and are formed in a flat waveform strip shape. A terminal screw 17 is provided at a position facing the branch breaker 3. The connection piece 18 is connected to the screw 17.

The bar support member 19 has a non-elastic locking piece 73 that locks to the locking portion 72 and an elastic locking piece 74 that locks to the locking portion 72, and is mounted on the bottom 7 so as not to come off. Have been. The non-elastic locking piece 73 protrudes from one side surface of the bar support member 19, has a guide taper 75 having a tapered end on the upper surface, and locks so as to fit into the recess of the locking portion 72, and The bars 2a to 2c are also used for positioning in the longitudinal direction.
The elastic locking piece 74 has a base portion 74a protruding from the side surface of the bar support member 19, and an intermediate portion 74b positioned parallel to the side surface of the bar support member 19, and a claw 74 locked to the locking portion 71 at the distal end portion.
c, and the intermediate portion 74b is fitted in the fitting concave portion 70 of the locking portion 71 (FIG. 10).

The main bars 2a to 2c are connected to a bar holding body 19.
The bars 2a and 2c are fixed to the above-mentioned stepped structure on both sides of the bottom of the bar holding body 19, and the bars 2b
Is held by a claw 21 on a support 20 at the center of the bar holder 19 and is higher than the other bars 2a and 2c. 22
Is a cover plate mounting post, 40 is a cover plate,
Reference numeral 46 denotes a holding claw for holding the cover plate 40.

The plurality of branch breakers 3 are main breakers 1
And is attached to the bottom 7 of the box 8. That is, the plurality of branch breakers 3 are disposed on the upper side along the main bars 2a to 2c, and the input terminals 2 are connected to the main bars 2a to 2c.
3 are connected by connecting pieces 23. The side surface 24 of the branch breaker 3 on the side of the main breaker 1 is located on the other end 30b side of the later-described central feed bar 4b, that is, on an extension of the bar connection side.

The mounting plate 25 is for mounting the branch breaker 3 and has hooking pieces 54 and 57 for temporary fixing to be hooked on the hooking sections 51 and 52, and is mounted on the mounting sections 59 and 62 and mounted. It is screwed to the hole 63 by the screw 27. The hooking piece 57 is formed by cutting and raising a hook-like hooking claw that hooks on the hooking section 52, and the hooking piece 54 is bent toward the bottom 7 of the mounting plate 25 and fitted into the hooking section 51. A fitting hole 55 is formed, and the tip 56 of the hooking piece 54 is in contact with the bottom 7 of the box 8. 58 is a positioning portion of the branch breaker 3 formed by cutting and bending, and 64 is a screw hole for mounting the branch breaker 3.

The branch breaker 3 is mounted on a mounting plate 25 with screws 26, and the mounting plate 25 is mounted on the box 8 with screws 27. On the other hand, the input terminal 23 of the branch breaker 3
Have a neutral bar 2b and a voltage bar 2
100 V is input by connecting the connecting piece 18 of the a or 2c, or 200 V is input by connecting the connecting piece 18 of the bars 2a and 2c.

The feed bars 4a to 4c connect the output terminal 6 of the main breaker 1 and the main bars 2a to 2c. Among the feed bars 4a to 4c, the feed bars 4a and 4c on the voltage side connected to the output terminals 6 on both sides of the main breaker 1 have a middle plane perpendicular to the bottom 7 of the box 8, and the main breaker. The feed bar 4b on the neutral side connected to the output terminal 6 at the center of the box 1 has an intermediate plane parallel to the bottom 7 of the box 8 and located farther from the bottom 7 than the feed bars 4a, 4c on the voltage side. Have been. Further, an insulating section 4 for separating an intermediate portion between the voltage-side feed bars 4a and 4c and an intermediate portion between the neutral-side feed bars 4b.
5 is provided on the box body 8, and the insulating portion 45 is in the form of a wall plate and is erected on the bottom portion 7 so as to be higher than the height of the intermediate portion between the voltage-side feed bars 4a and 4b. Further, the middle part of the voltage-side feed bars 4a and 4b and the upper part of the insulating part 45 are covered by the middle part of the neutral-side feed bar 4b.

Each of the three feed bars 4a to 4c has one end 29.
a to 29c are connected to the output terminal 6 of the main breaker 1, and the other ends 30a to 30c extend along the side surface 16 of the main breaker 1, and the ends 28a to 28c of the main bars 2a to 2c are provided.
, And cross the intersection to feed bars 4a-4c and bars 2
The connection portions 31a to 31c with the 2c. These feed bars 4a to 4c are formed by bending a flat plate, and have a substantially L-shape including one piece 32 and another piece 33 as shown in FIG. 4, and the feed bars 4a and 4c form an intermediate portion. The plane of one piece 32 is formed in a vertical posture and the plane of the other piece 33 is formed in a horizontal posture.
6 and along the feed bars 4a to 4c,
The feed bar 4c is longer than the feed bar 4c.
a is longer. Also, the feed bar 4b is formed so that both the one piece 32 and the other piece 33 forming the intermediate portion have a flat horizontal plane, and the one piece 32 is one piece 32 of the feed bars 4a and 4c.
And the other piece 33 has an intermediate length between the other pieces 33 of the feed bars 4a and 4c. And each feed bar 4
a to 4c are connected to the output terminal 6 by step bending portions 4a to 4c.
Notches are formed through 1a-41c, and the other ends of the feed bars 4a, 4b are formed with step bending portions 42a, 42b in opposite directions so as to overlap the main bars 2a-2c, and the connecting portions 31a- A hole is formed to pass the connection screw 31c. A hole matching this hole is also formed at the ends 28a to 28c of the main bars 2a to 2c.

According to this embodiment, the feed bars 4a to 4a
4c and the main breaker 1 through the main bars 2a to 2c.
And the branch breaker 3 are connected. In this case, the plane of the middle part of the feed bars 4a, 4c on the voltage side is perpendicular to the bottom 7 of the box 8, and the plane of the middle part of the feed bar 4b on the neutral side is parallel to the bottom 7 of the box 8. Feed bars 4a, 4c on the voltage side
Since it is arranged farther from the bottom 7 than before, the insulation interval between the intermediate portions of the feed bar can be made wider than before, the box 8 can be downsized, and extra members such as an insulating cover are unnecessary. Required.

Further, an insulating portion 4 for partitioning an intermediate portion between the voltage side feed bars 4a and 4c and an intermediate portion between the neutral side feed bars 4b.
Since the box 5 is provided on the box 8, the insulation between the feed bars 4 a to 4 c can be more reliably achieved by the insulating portion 45. Further, since the upper part of the intermediate part of the feed bars 4a and 4c on the voltage side is covered by the intermediate part of the feed bar 4b on the neutral side, even if an operator tries to touch the intermediate part of the feed bars 4a and 4c, the main breaker can be used. Only the neutral feed bar 4b connected to the center output terminal 6 of the first unit 1 can be touched, and it is difficult to receive an electric shock, so that safety can be achieved.

The insulating part 45 is connected to the voltage-side feed bars 4a,
4c, the neutral side feed bar 4b is deformed to the voltage side feed bars 4a and 4c side even if the neutral side feed bar 4b is deformed to the voltage side feed bars 4a and 4c side. It becomes difficult to contact the feed bars 4a and 4c, and the possibility of short circuit is reduced. FIG. 14 shows a second embodiment of the present invention. That is, in this distribution board, in the first embodiment, the insulating portion 45 is in contact with the middle portion of the feed bar 4b on the center side.

According to this embodiment, the feed bar 4b on the neutral side hardly deforms toward the feed bars 4a and 4c on the voltage side. Others are the same as in the first embodiment.

[0027]

According to the distribution board of the first aspect, the plane of the intermediate portion of the feed bar on the voltage side is perpendicular to the bottom of the box,
Since the plane of the middle part of the neutral side feed bar is parallel to the bottom of the box and is located farther from the bottom than the voltage side feed bar, the insulation interval between the middle parts of the feed bars is smaller than in the conventional case. There is an effect that it can be widely taken, the box can be miniaturized, and an extra member such as an insulating cover is unnecessary.

According to a second aspect of the present invention, in the first aspect of the present invention, the box is provided with an insulating portion for partitioning an intermediate portion of the voltage side feed bar and an intermediate portion of the neutral side feed bar. In addition to the effects of the first aspect, the insulation between the feed bars can be more reliably achieved by the insulating portion. According to the distribution board of claim 3, in claim 1 or claim 2, the upper part of the intermediate part of the feed bar on the voltage side is covered by the intermediate part of the feed bar on the neutral side. In addition to the effect of claim 2, even if an operator attempts to touch the intermediate portion of the feed bar, only the neutral feed bar connected to the central output terminal of the main breaker is touched, and electric shock is difficult. Can be safe.

According to a fourth aspect of the present invention, in addition to the third aspect, the insulating portion is higher than the intermediate portion of the feed bar on the voltage side. Even if the feed bar is deformed toward the voltage-side feed bar, the neutral-side feed bar hits the insulating portion, making it difficult to contact the voltage-side feed bar, thereby reducing the possibility of short circuit. Claim 5
According to the power distribution board of claim 3, in claim 3, the insulating portion is in contact with the feed bar on the center side. Therefore, in addition to the effect of claim 3, the feed bar on the neutral side is connected to the feed bar on the voltage side. It is difficult to deform.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention. It is the fragmentary sectional view which looked at the branch breaker from the right side.

FIG. 2 is a partial sectional view of the branch breaker as viewed from the right side.

FIG. 3 is a partial plan view of the distribution board.

FIG. 4 is a plan view with a cover removed.

FIG. 5 is a perspective view of the mounting plate as viewed from the back side.

FIG. 6 is a partial sectional view of a branch breaker of the distribution board as viewed from the left side.

FIG. 7 is a partially enlarged view of FIG.

FIG. 8 is a horizontal sectional view of a distribution board.

FIG. 9 is a cutaway perspective view of a bar.

FIG. 10 is a partial plan view thereof.

FIG. 11 is a plan view of a box.

FIG. 12 is a perspective view showing a state where a cover is removed.

FIG. 13 is a perspective view showing a state in which a cover is closed.

FIG. 14 is a partial cross-sectional view illustrating an insulating unit according to the second embodiment.

FIG. 15 is an explanatory view showing a conventional feed bar.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main breaker 2a-2c Main bar 3 Branch breaker 4a-4c Feed bar 5 Input terminal 6 Output terminal 7 Bottom 8 Box 23 Output terminal 45 Insulation part

────────────────────────────────────────────────── (5) References JP-A-54-30444 (JP, A) JP-A-1-61808 (JP, U) JP-A-56-126107 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) H02B 1/20 H02B 1/40-1/44

Claims (5)

(57) [Claims] 1. A box, having a three-pole input / output terminal at both ends, mounted on the bottom of the box and having a central input terminal connected to the neutral line of the electric circuit and input terminals on both sides connected to the electric circuit. A main breaker connected to the voltage line, and a plurality of branch breakers attached to the bottom of the box alongside the main breaker;
Three main bars are arranged at the bottom of the box body along the direction in which these branch breakers are arranged and connected to the input terminals of the branch breakers, and the output terminals of the main breakers are connected to the main bar. A feed bar connected to output terminals on both sides of the main breaker, wherein the plane of the middle part of the feed bar is perpendicular to the bottom of the box, and The neutral-side feed bar connected to the central output terminal is characterized in that the plane of the intermediate portion is parallel to the bottom of the box and is located farther from the bottom than the voltage-side feed bar. Distribution board. 2. The distribution board according to claim 1, wherein an insulating portion that partitions an intermediate portion of the feed bar on the voltage side and an intermediate portion of the feed bar on the neutral side is provided in the box. 3. The distribution board according to claim 1, wherein an upper portion of an intermediate portion of the voltage-side feed bar is covered by an intermediate portion of the neutral-side feed bar. 4. The distribution board according to claim 3, wherein the insulating portion is higher than a height of an intermediate portion of the feed bar on the voltage side. 5. The distribution board according to claim 3, wherein said insulating portion is in contact with said center side feed bar.