JP3015143B2 - Distribution board branching device - 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 box containing a main breaker and a plurality of branch breakers.
The present invention relates to a distribution board branching device for efficiently arranging a conductive bar electrically connected to a load terminal of a main breaker and each branch breaker in a distribution board box.

[0002]

2. Description of the Related Art Generally, a distribution board is constructed by disposing a main breaker and a plurality of branch breakers in a distribution board box. Since there are many types of branch breakers used for the distribution board, it is necessary to select a type of branch breaker for each design specification of the distribution board and arrange it in the distribution board box.
When arranging branch breakers of a plurality of types in one distribution board box, one conductive bar electrically connected to the load-side terminal of the main breaker is provided for each line, and
At present, the conductive bar is shared by a plurality of types of branch breakers.

[0003]

By the way, the types of branch breakers stored in one distribution board box are at most several types. It is conceivable to attach them to the distribution board box collectively. However, since the conductive bar is shared by the branch breakers of each type, it is necessary to select a connection member for electrically connecting the conductive bar and each branch breaker according to the combination of the branch breaker types. Then, there arises a problem that the number of kinds of parts is increased.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by branching breakers having the same shape into a block and unifying branch breakers of different types into a distribution board box. Accordingly, it is an object of the present invention to provide a branching device for a distribution board in which the construction is labor-saving and a conductive bar is provided for each block to prevent an increase in the number of parts.

[0005]

In order to achieve the above object, according to the present invention, a pair of fixed-pitch mounting portions which are disposed substantially in parallel at fixed positions on both sides in a distribution board box are formed. A mounting frame, comprising a plurality of mounting plates that are held between the two mounting frames and are electrically connected to the load side terminals of the main breaker and a plurality of mounting plates each holding a plurality of branch breakers, and one mounting plate includes A branch breaker having a body of the same shape is arranged, and a breaker base for equalizing a distance from a back plate of the distribution board box to a front surface of the branch breaker between different mounting plates is provided on each mounting plate, and a conductive bar is provided. the mounting plate at both end portions of the conductive bars have been arranged in a direction parallel to the mounting frame
A connection portion protruding from both ends and connectable to a conductive bar held on another mounting plate is provided, and a support base for equalizing the distance from the back plate of the distribution board box to the connection portion between different mounting plates is provided. It is provided on the mounting plate.

[0006]

According to the above configuration, the branch breakers having the same shape of the body are arranged collectively on one mounting plate, and each mounting plate is formed of a pair of mounting frames provided on the distribution board box. Since it is installed between them, the branch breaker can be blocked by the mounting plate for each specification. In addition, since each mounting plate holds a conductive bar electrically connected to the load side terminal of the main breaker, a member for electrically connecting the conductive bar and the branch breaker is provided by the branch breaker. It suffices to prepare for each shape of the body, and it is not necessary to use different members for each design specification of the distribution board, so that it is possible to prevent an increase in the number of parts. In addition, the conductive bar of each mounting plate has a connecting portion protruding from both ends of the mounting plate and connectable to the conductive bars of the other mounting plates, and a connecting portion between different mounting plates from the back plate of the distribution board box. Since the support bases having the same distance to each other are provided on the mounting plate, the conductive bars provided on each mounting plate can be sequentially connected. Here, the adjacent mounting press
Each connection of the port protrudes from the end face of the mounting plate
So the insulation distance between each mounting plate and the connection of the conductive bar
Can be made sufficiently large. As described above, the branch breakers can be grouped into blocks according to the shape of the body. It can be arranged in a box, and as a result, the work of the distribution board can be saved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a pair of left and right mounting frames 2 are disposed in a distribution board box 1 having a door 1a.
A plurality of (here, five) mounting plates 3 are installed between the two mounting frames 2. In each mounting frame 2, mounting holes (not shown) as mounting portions are drilled at a constant pitch, and mounting screws are screwed into the mounting holes through both ends of the mounting plate 3, thereby mounting the mounting frame 2. The plate 3 is fixed. A main breaker 10, a one-pole branch breaker 20, a two-pole branch breaker 30, and a neutral switch 40 are attached to each mounting plate 3.

In FIG. 1, a main breaker 10 straddling the two mounting plates 3 is used.
May be used. Also,
Although the main breaker 10 is a single-phase three-wire main body having three-pole contacts in the body, three main-pole breakers 10 having one-pole contacts in the body may be used. The main breaker 10 is provided with three load-side terminals, and the load-side terminals are connected to the branch breakers 20, 30 and the neutral switch 40 via conductive bars 7a, 7b, 7c. Conductive bar 7
a and 7c are for power lines, and the conductive bar 7b is for neutral lines.

The branch breakers 20 and 30 having the same shape are arranged together on one mounting plate 3. In other words, one pole-type branch breaker 20 is attached to one of the two mounting plates 3 to which the branch breakers 20 and 30 are mounted, that is, four on each of the left and right sides, for a total of eight.
On the other hand, a total of six 2-pole branch breakers 30 are mounted, three on each of the left and right sides. Here, the branch breakers 20, 30
Needless to say, the configuration is not limited to the configuration of the embodiment.

As shown in FIG. 2, the unipolar branch breaker 20 is fixed to a breaker table 21 mounted on the mounting plate 3. That is, as shown in FIG. 3, the branch breaker 20 is attached while being floated from the mounting plate 3.
The conductive bars 7a, 7b, 7c are connected to the power supply side terminal of the branch breaker 20 via the connecting plate 22. Contact plate 22
Are fixed to the conductive bars 7a, 7b, 7c by connecting screws 23. That is, the conductive bars 7a, 7b, 7
c is supported by the branch breaker 20 via the connecting plate 22. Here, each conductive bar 7a, 7b, 7c
An insulating base 27 made of a synthetic resin molded product is provided to hold the conductive bars 7a, 7b, 7c apart from each other so that the conductive bars 7a, 7b, 7c do not short-circuit due to contact with each other. Insulating base 27 has conductive bars 7a, 7c for power lines.
And a pair of left and right holding frames 24 each having a substantially U shape for holding
A holding table 25 on which the neutral conductive bar 7b is placed is provided between the two holding frames 24 so as to protrude. Arrow-shaped positioning projections 26 are projected from the inside of each holding frame 24 and the tip end surface of the holding table 25. The positioning projections 26 are inserted into positioning holes 52 provided in the conductive bars 7a, 7b, 7c. The insulating base 27 is positioned with respect to the conductive bars 7a, 7b, 7c. Here, the insulating base 27
Are connected only to the conductive bars 7a, 7b, 7c, so that they are floating from the mounting plate 3. That is, the conductive bars 7a, 7
The distances to b and 7c are determined by the shape of the connecting plate 22, and the branch breaker 20 and the connecting plate 22 are connected to the conductive bars 7a, 7b and 7c from the bottom of the distribution board box 1.
It will function as a support that regulates the distance to.

As shown in FIGS. 4 and 5, the two-pole type branch breaker 30 has a mounting base 3 made of a synthetic resin molded product.
1 is connected to the mounting plate 3. As shown in FIGS. 8 and 9, the mounting base 31 has a breaker base 32 on both left and right sides, and is formed in a shape integrally having a concave groove-shaped support base 33 at the center. As shown in FIG. 8, three mounting protrusions 32 a for determining the position of the branch breaker 30 are provided on the breaker base 32 so as to protrude by three for each branch breaker 30, and are formed of tapping screws inserted into the branch breaker 30. One screw insertion hole 32b into which the mounting screw 34 (see FIG. 6) is screwed is formed for each branch breaker 30. That is, each branch breaker 30 is connected to the mounting base 31 by one mounting screw 34. The support 33 has three conductive bars 7a, 7b, 7c.
Is arranged. A plurality of positioning protrusions 33a protrude from the bottom of the support base 33. The conductive bars 7a, 7c for power lines are arranged between the positioning protrusions 33a that are paired on the left and right, so that the conductive bars 7a, 7c are arranged. 7c is restricted from moving left and right. A pair of insulating walls 35 spaced apart in the longitudinal direction of the conductive bars 7a, 7b, 7c protrude from the center of the support base 33, and a support pillar 36 protrudes between the insulating walls 35. Positioning projections 35a are projected from the front end surface of each insulating wall 35, and engage with positioning holes 52 formed in the conductive bar 7b for neutral wire to determine the position of the conductive bar 7b. In addition, as shown in FIGS. 6 and 7, the conductive bar 7b is fixed to the mounting base 31 by a fixing screw 59 screwed into the distal end surface of the support column 36 through the positioning hole 52 formed in the conductive bar 7b. Thus, the insulation distance between the conductive bars 7a, 7b, 7c can be secured.

On the other hand, as shown in FIG. 9, a plurality of hook pieces 37 which are engaged with a large number of holding holes 3a formed in the mounting plate 3 protrude from the back surface of the breaker base 32.
On the back surface at the center of each breaker table 32, a boss 3
8 are protruded. Further, a guide projection 39 to be inserted into the holding hole 3a is provided to project from the center rear surface of the support base 33.
Accordingly, by pressing the mounting base 31 against the mounting plate 3 as shown in FIG. 10 while controlling the relative position between the mounting base 31 and the mounting plate 3 by inserting the guide projection 39 into the holding hole 3a, the holding The hook pieces 37 are engaged with the holes 3a, so that the mounting base 31 can be fixed to the mounting plate 3. Thus, the guide projection 39
Is inserted into the holding hole 3a, positioning of the mounting base 31 and the mounting plate 3 becomes easy, and moreover,
After the mounting base 31 and the mounting plate 3 have been connected, it is possible to prevent displacement between the mounting base 31 and the mounting plate 3 due to an external impact or the like. Here, when increasing the bonding strength between the mounting plate 3 and the mounting base 31, the boss 3 is inserted through the mounting plate 3.
A screw 8 may be screwed.

In each breaker table 32, the conductive bars 7a,
At both ends of the side surface parallel to 7b and 7c, an electric wire 8 is provided.
Is formed in the wire holding groove 32c that can sandwich the wire. As shown in FIG. 11, the electric wire holding groove 32c is used to connect the electric wire 8 disposed on the back side of the mounting base 31 to the breaker base 3.
It is formed so that it can be pulled out to the front side of the mounting base 31 at both ends of the side surface of the second base. Therefore, the electric wire 8 can be sandwiched in the electric wire holding groove 32c in a state where the mounting base 31 is mounted on the distribution board box 1 via the mounting plate 3, so that the electric wire 8 is fixed and the operation of the electric wire 8 is reduced. Also, since the electric wires 8 can be fixed after the mounting plate 3 is mounted in the distribution board box 1, the operation of fixing the electric wires 8 can be easily performed.

The conductive bars 7a, 7b, 7c are formed in the same shape, and as shown in FIG. 12, screw holes 51 and positioning holes 52 are formed alternately in the longitudinal direction. Further, a connection portion having a connection hole 53 at the center is provided at both ends in the longitudinal direction of the conductive bars 7a, 7b, 7c, and one connection portion has a step 54 having a thickness of about the thickness of the conductive bars 7a, 7b, 7c. It is provided through. This step 5
The connection hole 53 provided through the hole 4 is a screw hole. Each of the conductive bars 7 a, 7 b, 7 c is arranged such that both connecting portions protrude from the edge of the mounting plate 3. One leg of a substantially U-shaped connecting plate 55 shown in FIG. 13 is fixed to the power line conductive bars 7a and 7c by rivets 56 (see FIG. 15) inserted into the screw holes 51. You. The communication plate 55 has a locking piece 55a at the tip of one leg fixed by the rivet 56 to abut on the edge of the conductive bars 7a, 7c to regulate the position with respect to the conductive bars 7a, 7c. A connection piece 55c connected to the power supply terminal of the branch breaker 30 is extended through a step 55b at the tip of the leg piece. Further, a screw hole 55d is formed in the other leg piece.

On the other hand, in order to connect the conductive bar 7b for the neutral wire to the power supply side terminal of the branch breaker 30, a connecting plate 57 having a shape as shown in FIG. 14 is used. A pair of through holes 57a and 57b into which the connection screw 58 is inserted are formed in the communication plate 57 so as to be spaced apart in the longitudinal direction (the direction orthogonal to the conductive bar 7b), and a step 57c is formed at one end in the longitudinal direction. Piece 57d connected to the power supply side terminal of branch breaker 30 through
Is extended. Further, a locking piece 57e is provided on the side edge of the communication plate 57 to abut on the edge of the conductive bar 7b to regulate the position of the communication plate 57 with respect to the conductive bar 7b.

Therefore, the voltage of the load side terminal of the branch breaker 30 is set to 100 V (the voltage between one of the conductive bars 7a and 7c for the power line and the conductive bar 7b for the neutral line).
When using the conductive bar 7 as shown in FIG.
The connection plate 57 is placed on the upper surface of the conductive bar 7b, and the connection screw 58 is screwed into the screw hole 51 of the conductive bar 7b through the through hole 57a. At this time, the positioning of the connecting plate 57 with respect to the conductive bar 7b is facilitated by the contact of the locking piece 57e with the side edge of the conductive bar 7b. At this time, the connection piece 57d of the communication plate 57 is positioned below the conductive bar 7b.

When the voltage of the load terminal of the branch breaker 30 is used at 200 V (the voltage between the conductive bars 7a and 7c for both power lines), the broken line in FIG.
As shown by a branch breaker 30 of a part (left row lower row, right row middle row), the connecting plate 5 passes below the conductive bar 7b.
5, the connecting plate 57 is superimposed on the leg piece on the side of the connecting piece 55c, and the connecting screw 58 is inserted through the through hole 57b.
Screwed into the screw hole 55d. Thus, the conductive bars 7a and 7c are electrically connected to the power supply side terminal of the branch breaker 30.

As described above, the connection between the power supply terminal of the branch breaker 30 and the conductive bars 7a, 7b, 7c is changed only by changing the mounting position of the communication plate 57, thereby changing the connection relationship to 100V.
And 200V can be used, and the same member can be used when setting to different voltage specifications. Therefore, the conductive bars 7a, 7b, 7c are formed in the same shape, and the conductive bars 7a,
7c, the connecting plate 55 is fixed, and the connection screw 58 is connected to one of the conductive bar 7b for neutral wire and the connecting plate 55.
If the contact plate 57 is attached, the 100V specification and 20
This makes it possible to cope with any of the 0V specifications, and the number of component types is small, leading to cost reduction. Further, the conductive bars 7a, 7b, 7c and the branch breaker 30 are mounted on the mounting plate 3 via the mounting base 31.
And the length of the conductive bars 7a, 7b, 7c is set to be slightly larger than the width of the mounting plate 3, so when using another type of branch breaker, the other type of branch breaker must be installed. The mounted mounting plate 3 is mounted on the mounting frame 2 and the conductive bars 7a, 7
After the connection portions b and 7c are overlapped with each other so that the connection holes 53 coincide with each other, the conductive bars 7a, 7b and 7c may be tightened through the connection holes 53 using connection screws (not shown). . That is, a plurality of branch breakers attached to each mounting plate 3 can be handled in blocks, and the branch breakers can be arranged in the distribution board box 1 in block units.

Further, as described above, the branch breaker 3
0 is placed on the breaker base 32, the distance from the back plate of the distribution board box 1 to the front of the branch breaker 30 is
The size of the breaker base 32 can be set to be the same as the branch breaker 20 attached to the other mounting plate 3, and the branch breakers 20 and 30 having different specifications can be arranged in the distribution board box 1. Regardless, each branch breaker 2
The front surfaces of 0 and 30 can be arranged on substantially one plane. As a result, the amount of protrusion of the branch breakers 20 and 30 from the inner lid provided in the distribution board box 1 becomes substantially constant, and beautifully finished. Also,
Since the conductive bars 7a, 7b, 7c are placed on the support 33, the conductive bars 7a, 7b, 7c are placed on the back plate of the distribution board box 1.
a, 7b, 7c so that the distance to the conductive bars 7a, 7b, 7c attached to the other mounting plate 3 is the same.
The dimensions of the support 33 can be set. As a result, the conductive bars 7a, 7b,
The positions of the conductive bars 7c can be unified.
a, 7b and 7c can be electrically connected.

By the way, as shown in FIG. 1, the conductive bars 7a, 7b, 7c of the mounting plate 3 to which the branch breakers 20, 30 are mounted, and the load-side terminals of the main breaker 10,
The connection is made via the conductive plate 12. On the other hand, the mounting plate 3 to which the neutral wire switch 40 is attached is electrically connected to the conductive plate 43 connected to the conductive bar 7b for neutral wire, and A branch bar (not shown) disposed in a direction orthogonal to the pair is provided so as to extend between a pair of insulating stands 42. A plurality of neutral wire switches 40 are arranged on this branch bar. Therefore, if a load is connected between the unipolar branch breaker 20 and the neutral switch 40, power can be supplied at 100V. Further, an electric wire 8 for detecting an open phase of a neutral wire is connected to a connection point between the conductive plate 43 and the branch bar. This electric wire 8 is connected to the neutral line open phase detecting circuit in the main breaker 10, and the middle part is the branch breaker 3.
0 is held in the electric wire holding groove 32c on the side of the mounting base 31 to which the mounting base 31 is attached. As a result, the electric wires 8 can be beautifully arranged.

[0021]

According to the present invention as described above, a pair branch breakers having a device body of the same shape, there is being arranged together on a single mounting plate, the mounting plate is provided on the distribution board box Since it is installed between the mounting frames of
The branch breaker can be blocked by the mounting plate for each specification. In addition, since each mounting plate holds a conductive bar electrically connected to the load side terminal of the main breaker, a member for electrically connecting the conductive bar and the branch breaker is provided by the branch breaker. Since there is no need to use a different member for each design specification of the distribution board, there is an advantage that an increase in the number of component types can be prevented. In addition, the conductive bars on each mounting plate protrude from both ends of the mounting plate.
Out a connection portion connectable to a conductive bar of the other mounting plate, provided with a support base to equal the distance to the connecting portion from the back plate of the distribution board box between the different mounting plate to the mounting plate Therefore, the conductive bars provided on each mounting plate can be sequentially connected. here
Each connecting part of the adjacent mounting plate is
Since it protrudes from the end face, each mounting plate and conductive bar
Can be made sufficiently long.
As described above, branch breakers can be grouped into blocks for each body shape, and if blocks are combined according to the design specifications of the distribution board, multiple types of branch breakers can be combined. It can be arranged in a box, and as a result, there is an effect that the construction of the distribution board is labor-saving.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment.

FIG. 2 is a schematic sectional view showing an embodiment.

FIG. 3 is an exploded perspective view of a main part showing the embodiment.

FIG. 4 is a perspective view showing a state in which a branch breaker is attached to a mounting plate according to the embodiment.

FIG. 5 is a side view showing a state where a branch breaker is attached to a mounting plate according to the embodiment.

FIG. 6 is a front view showing a state where a branch breaker is attached to a mounting plate according to the embodiment.

FIG. 7 is a cross-sectional view showing a state where a branch breaker is attached to a mounting base according to the embodiment.

FIG. 8 is an exploded perspective view showing a relationship between a mounting plate and a mounting base in the embodiment.

FIG. 9 is an exploded perspective view showing a relationship between a mounting plate and a mounting base in the embodiment.

FIGS. 10A and 10B are side views showing the relationship between the mounting plate and the mounting base in the embodiment, wherein FIG. 10A shows a state before connection and FIG. 10B shows a state after connection.

FIG. 11 is a side view showing a state where a branch breaker is attached to a mounting plate according to the embodiment.

FIG. 12 is a perspective view showing a conductive bar used in the embodiment.

FIG. 13 is a perspective view showing a communication plate used in the embodiment.

FIG. 14 is a perspective view showing a communication plate used in the embodiment.

FIG. 15 is a perspective view showing a state where a communication plate is attached to each conductive bar used in the embodiment.

FIG. 16 is a side view of a main part showing how to use the communication plate in the embodiment.

FIG. 17 is a perspective view of a main part showing a different use form in the embodiment.

[Explanation of symbols]

 Reference Signs List 1 distribution board box 2 mounting frame 3 mounting plate 7a conductive bar 7b conductive bar 7c conductive bar 20 branch breaker 21 breaker base 30 branch breaker 31 mounting base 32 breaker base 33 support base 53 connection hole

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hirokazu Hasegawa 737-12, Anata-cho, Seto-shi, Aichi Owarimatsu Shimo Electric Works Co., Ltd. -50611 (JP, U) Actually open 1981-113408 (JP, U) Actually open, 53-17737 (JP, U) Actually open, 1-159510 (JP, U) Actually open, 55-120209 (JP, U) ) Actually open 52-53333 (JP, U) Actually open 56-129112 (JP, U) Actually open 61-162207 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02B 1/40-1/42

Claims (1)

(57) [Claims] 1. A pair of mounting frames, which are disposed substantially parallel to fixed positions on both sides in a distribution board box and have mounting portions of a fixed pitch, and a load of a main breaker which is installed between the mounting frames. A conductive bar electrically connected to the side terminal and a plurality of mounting plates each holding a plurality of branch breakers, wherein a branch breaker having a body of the same shape is arranged on one mounting plate; A breaker base is provided on each mounting plate to make the distance from the back plate of the distribution board box to the front of the branch breaker equal to each other, and the conductive bars are disposed in a direction parallel to the mounting frame. Both ends of the mounting plate
A connection portion protruding from the end and connectable to a conductive bar held on another mounting plate is provided, and a support base for equalizing the distance from the back plate of the distribution board box to the connection portion between different mounting plates is provided. A distribution board branching device provided on a mounting plate.