JP3380438B2 - 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 having a plug-in type circuit breaker for inserting and connecting conductive bars.

[0002]

2. Description of the Related Art Conventionally, in a distribution board of this type, a plug-in type circuit breaker to be inserted into a conductive bar of a mounting base is simply inserted into the conductive bar and connected, and then removed. .

[0003]

However, in the work of pulling out from the insertion direction, that is, the direction parallel to the conductive bar as it is, the elasticity of the receiving blade acts as the pulling resistance of the circuit breaker as it is, and it is difficult to remove the circuit breaker. There was a problem. Therefore, an object of the present invention is to provide a distribution board in which a circuit breaker can be easily removed.

[0004]

A circuit breaker according to claim 1, wherein a plurality of insertion grooves are provided in the vertical direction of the end face, and a receiving blade is provided inside each of these insertion grooves, and this circuit breaker. And a mounting base having a plurality of conductive bars which have a mounting portion for detachably mounting the circuit breaker and which are inserted into the insertion groove and come into contact with the receiving blade when the circuit breaker is mounted on the mounting portion. The mounting base is provided with a withdrawal fulcrum portion with which the end surface above the uppermost insertion groove of the circuit breaker contacts with the circuit breaker mounted to the mounting portion. It is a thing.

According to the circuit breaker of the first aspect, when the circuit breaker is detached from the mounting base, the mounting side of the circuit breaker is separated from the conductive bar with the fulcrum for pulling out the circuit breaker as a fulcrum. By rotating the circuit breaker in the direction, the circuit breaker is more easily removed from the conductive bar than in the conventional example, and the work of replacing the circuit breaker can be facilitated. The circuit breaker according to claim 2, wherein an insulating plate is provided between the plurality of conductive bars according to claim 1, and an insulating plate mounting portion sandwiching the insulating plate is provided between the insertion grooves of the circuit breaker. It was installed in.

According to the circuit breaker of the second aspect, in addition to the same effect as that of the first aspect, the insulating plate can be attached between the insulating plate mounting portions of the circuit breaker facing each other with the conductive bar interposed therebetween.
The space between the conductive bars can be narrowed to achieve compactness.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to FIGS. That is, this distribution board has the circuit breakers 1 and 2, the mounting base 3, and the extraction fulcrum 5. The circuit breakers 1 and 2 have a plurality of insertion grooves 7 in the up-down direction of the end face 6, and have receiving blades 8 inside these insertion grooves 7, respectively. Circuit breakers 1 and 2 of the embodiment
Each of them comprises a circuit breaker body 26 and an adapter 9 as shown in FIG. The circuit breaker body 26 is for branching. As shown in FIG. 3, the adapter 9 is an adapter case 1
3, an insertion groove 7 is formed in the front side wall, an insertion hole 10 is formed in the rear side wall, and a receiving blade 8 is provided inside. Adapter case 1
3, the front case 14 and the rear case 16 are combined in a fitted state, and the locking claws 17 and the receiving portions 20 are locked to be connected. The insertion groove 7 is formed to have a predetermined width and a divergent shape so that the circuit breakers 1 and 2 can be rotated with the conductive bar 30 inserted as will be described later. The receiving blade 8 is the insertion groove 7
The guide plate 11 includes two guide plates 11 disposed inside the
The elastic force is reinforced by a substantially U-shaped pressure contact member 12 so as to sandwich. A portion of the two guide plates 11 extending rearward from the receiving blade 8 is bent into a substantially Z shape, and intermediate portions thereof are overlapped and supported by the inner surface 18 of the rear side wall of the adapter case 13, and the extended end of the guide plate 11 is formed. In the state where two parts are stacked, they project to the outside through the insertion hole 10 and a U-shaped connection part 19 is formed at the tip thereof.
In the embodiment, the conductive plate 11 is formed by folding one strip-shaped conductor in two, and the connecting portion 19 is formed at the bent portion. This connecting portion 19 is connected to the terminal screw 15 of the circuit breaker body 8.
The adapter case 13 is detachably and electrically and mechanically connected.

An insulating plate mounting portion 21 is provided between the insertion grooves 7 of the adapter case 13. In the embodiment, it is formed in a groove shape parallel to the insertion groove 7. Reference numeral 22 is a cover portion that covers the terminal screw 15, 23 is a driver insertion hole thereof, 24 is a mounting recess of the circuit breaker main body 26, and 25 is a guide portion of the mounting recess 24. The mounting base 3 has a mounting portion 4 on which the circuit breakers 1 and 2 are detachably mounted. When the circuit breakers 1 and 2 are mounted on the mounting portion 4, the mounting base 3 is inserted into the insertion groove 7 and attached to the receiving blade 8. It has a plurality of conductive bars 30 in contact. The mounting base 3 of the embodiment is mounted on a pair of frames 36 with screws 31, and the frame 36 is mounted on a distribution board case 32 with bolts 3.
It is attached by 3. The frame 36 has a mounting base 3
In parallel with the above, the master mounting base 34 is attached by the screw 45, the master circuit breaker 35 is installed on the master mounting base 34, and the base ends of the plurality of conductive bars 30 are connected to the load side terminals of the master circuit breaker 35. The bent portion 31 is connected, and the tip end side of the conductive bar 30 is arranged so as to be aligned in the direction perpendicular to the mounting base 3 as shown in FIG. Further, an insulating plate 38 to be inserted into the insulating plate mounting portion 21 is arranged between the plurality of conductive bars 30.

The circuit breakers 1 and 2 are made up of conductive bars 3 respectively.
A plurality of conductive bars 30 are arranged on the both sides of 0 along the longitudinal direction of the conductive bar 30 on the mounting base 3. Mounting part 4 is mounting base 3
Fixed claw 40 that is attached to the mounting recess 24 on the front end side of the circuit breaker main body 26 and the mounting recess 24 on the rear end side.
Elastic claw 4 that is hooked by elastic deformation on the
It consists of 1. The circuit breaker main body 26 is attached by mounting the guide portion 25 on the fixed claw 40 and advancing it while moving the rear end side of the circuit breaker 1 like the circuit breaker 1 of FIG.
Of the fixed claw 40 and the elastic claw 41 so that the mounting recess 24 on the front end side is hooked on the fixed claw 40 and at the same time the elastic claw 41 is pushed to make the bent part of the mounting recess 24. Hook, which results in, for example, FIG.
The circuit breaker 2 is mounted as in the mounting state. On the other hand, when removing, the tip of the conductive claw 41 is pushed toward the mounting base 3 side, and the bent portion separates from the mounting recess 24, so the rear end side of the circuit breaker 1 is pulled up and pulled away from the conductive bar 30. From the fixed claw 40 to the mounting recess 2
4 can be removed.

The withdrawal fulcrum portion 5 is provided on the mounting base 3,
Circuit breaker 1 with the circuit breaker 1 attached to the mounting portion 4
The end surface 42 of the end surface 6 comes into contact with the insertion groove 7 at the highest position. In the embodiment, the conductive bar 30 is arranged on the uppermost conductive bar 30, and the conductive bar 30 and the mounting base 34 for the trunk are provided.
Also, it is also used as a cylindrical insulating member having a square cross section attached to the attachment base 3 via the frame 36.

According to this embodiment, when the circuit breaker 1 is detached from the mounting base 3, the mounting base of the circuit breaker 1 with the pulling fulcrum 5 as the fulcrum of the circuit breaker 1 as shown in FIG. Three
When the side is rotated in the direction away from the conductive bar 30, the circuit breaker 1 becomes easier to come off from the conductive bar than in the conventional example.
The replacement work of the circuit breaker 1 can be facilitated. The same applies to the circuit breaker 2.

Further, since the insulating plate 38 can be attached between the insulating plate mounting portions 21 of the circuit breakers 1 and 2 which face each other with the conductive bar 30 interposed therebetween, the space between the conductive bars 30 can be narrowed and the size can be reduced. Can be achieved. A second embodiment of the present invention is shown in FIG. That is, in this distribution board, the insulating member that also serves as the uppermost extraction fulcrum portion 5 of the conductive bar 30 of the first embodiment is removed, and the extraction fulcrum portion 5 is connected to the pair of circuit breakers 1 and 2. The uppermost end face 42 is also used, and the circuit breakers 1 and 2 are configured to contact each other at the end face 42.
Therefore, the circuit breakers 1 and 2 are brought close to each other. In addition, the distribution board can be made compact as a whole. Others
Since it is the same as that of the first embodiment, common parts are given the same reference numerals.

A third embodiment of the present invention is shown in FIGS. 6 and 7. That is, in this distribution board, the circuit breaker 1 is a single pole type and has a high capacity, the conductive plates 11 of the receiving blades 8 are formed in double, and the connecting portions 11 are formed in quadruple. . Therefore, the contact force with respect to the conductive bar 30 is large, and therefore the pulling-out resistance per one blade 8 is large.

Also in this embodiment, by utilizing the fulcrum portion 5 as a lever, the withdrawal becomes easier than in the conventional case. Others are the same as those in the first embodiment, and common parts are denoted by the same reference numerals. Although the adapter 9 and the circuit breaker main body 26 are separate bodies in the embodiment, the adapter 9
May be integrated with the circuit breaker body 26, that is, the receiving blade 8 itself may be integrally arranged in the circuit breaker body.

The receiving blade 8 has a structure in which the conductive bar 4 is inserted and sandwiched by a pair of conductive plates 3a and 3b.
Only one of 3b may be used. Although the circuit breakers 1 and 2 are arranged on both sides of the conductive bar 30, they may be arranged on only one side. Furthermore, only one circuit breaker may be used.

[0016]

According to the circuit breaker of the first aspect of the present invention, when the circuit breaker is removed from the mounting base, the circuit breaker is mounted on the side of the mounting base of the circuit breaker with the pull-out fulcrum as a fulcrum. When rotated in a direction away from the circuit breaker, the circuit breaker is more easily removed from the conductive bar than in the conventional example, and the work of replacing the circuit breaker can be facilitated.

According to the circuit breaker of the second aspect, in addition to the same effect as that of the first aspect, the insulating plate can be attached between the insulating plate mounting portions of the circuit breaker facing each other with the conductive bar interposed therebetween.
The space between the conductive bars can be narrowed to achieve compactness.

[Brief description of drawings]

FIG. 1 is a side view for explaining attachment of a circuit breaker according to a first embodiment of this invention.

FIG. 2 is a plan view of an open state of a distribution board.

FIG. 3 is a sectional view of an adapter of a circuit breaker.

FIG. 4 is a perspective view of the circuit breaker with the adapter separated.

FIG. 5 is a side view for explaining attachment of the circuit breaker according to the second embodiment.

FIG. 6 is a side view of the third embodiment.

FIG. 7 is a sectional view of the adapter.

[Explanation of symbols]

1 circuit breaker 2 circuit breakers 4 Mounting part 5 Extraction fulcrum 6 end faces 7 insertion groove 8 receiving edge 9 Adapter 10 insertion holes 11 guide plate 12 Pressure contact member 13 Adapter case 15 terminal screw 21 Insulation plate mounting part 26 Circuit breaker body 30 Circuit breaker body 38 Insulation plate 42 Upper end face

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiko Hirao 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Tomoyuki Sawada, 1048, Kadoma, Kadoma City, Osaka Matsushita Electric Works, Ltd. ( 72) Inventor Toshihiro Oido 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inventor, Yasuhiro Sumino 1048, Kadoma, Kadoma City, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) Inventor, Yasushi Futahata Matsuda Electric Works Co., Ltd. 1048, Kadoma 1048, Kadoma, Osaka Prefecture (56) Reference Japanese Unexamined Patent Publication No. 11-69529 (JP, A) Actual development 56-166706 (JP, U) Actual development 55-173056 (JP, U) U.S. Patent 3346777 (US, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02B 1/40-1/42 H01H 73 / 06,73 / 08,73 / 20

Claims (2)

(57) [Claims] 1. A circuit breaker having a plurality of insertion grooves in an up-down direction of an end face, each having a receiving blade inside each of these insertion grooves, and a mounting portion for detachably mounting the circuit breaker. A mounting base having a plurality of conductive bars that are inserted into the insertion groove and come into contact with the receiving blade when the circuit breaker is mounted on the mounting portion, and the circuit breaker is mounted on the mounting portion. A distribution board, wherein a pulling fulcrum portion with which the end surface above the uppermost insertion groove of the circuit breaker abuts is provided on the mounting base. 2. The power distribution according to claim 1, wherein an insulating plate is provided between the plurality of conductive bars, and an insulating plate mounting portion sandwiching the insulating plate is provided between the insertion grooves of the circuit breaker. Board.