JP3045883B2 - 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 in which circuit breakers such as a circuit breaker and a leakage breaker are assembled in a panel body, and more particularly to a distribution board which facilitates wiring work on a secondary side. About the board.

[0002]

2. Description of the Related Art In general, a distribution board used for power distribution of building equipment includes a main circuit breaker and a number of branch circuit breakers connected to the main circuit breaker via a bus bar in a panel body covered with a protective cover. They are arranged in a line, and at the installation site, the work of connecting the secondary side wiring to the lighting and the outlet is performed on the load side terminal of the branch circuit breaker. This secondary side wiring enters the panel body from the upper or lower part of the distribution board, and is normally connected to the terminal parts of the branch circuit breakers, which are divided into right and left parts in the panel, via crimp terminals attached to the wiring terminals. Screw.

[0003]

However, since such a wiring work in the conventional distribution board must be performed with the protective cover removed, foreign matter such as dust and wire scraps at the work site can be charged by a charged portion such as a bus bar. In addition, there is a possibility that contact reliability may be impaired due to adhesion to the wiring, and the wiring terminals must be screwed one by one, so that many man-hours are required for wiring work. SUMMARY OF THE INVENTION It is an object of the present invention to provide a distribution board which can perform a connection work of a secondary side wiring without opening the inside of the board and reduce the number of man-hours of the wiring work.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a panel main body which is closed except for a front surface, and a panel body.
Of consists of a protective cover for covering the front, screw the distribution board to a plurality of branch circuit breakers are arranged to branch wiring from the mains therein, the load-side terminal plate of the branch circuit breaker to the end
A terminal plate connection part to be connected is formed, and a pressing plate is
A connection with a wire connection that sandwiches the wire between the spring
A connecting plate is provided in the housing, and the housing is provided with electric wires.
Insert parallel to the load side terminal plate with respect to the electric wire connection part.
An electric wire insertion port is opened.
By inserting a wire, this wire can be
With connecting wire connecting device connectable with a touch to the load side terminal plate of the branch circuit breaker, before the wire receptacle
It shall peep outside through the sidewall of the serial board main body.

[0005]

Since the wire insertion port of the wire connection device connected to the branch breaker is viewed from the side of the panel body of the distribution board, the wires can be connected without removing the protective cover. Also, since the wire can be inserted and connected to the wire connection device with one touch,
The connection is extremely simple, and the number of wiring steps is reduced.

[0006]

FIG. 1 is a partially cutaway front view of a distribution board according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG.
FIG. 3 is a top view of FIG. The distribution board shown in the figure is roughly divided into a panel main body 1 having a groove-shaped cross section, a plate-like protective cover 2 (2a, 2b) divided into upper and lower portions covering the upper surface thereof, and a flat base 3 supporting the panel main body 1. , A duct cover 5 having an L-shaped cross section attached to both sides thereof by a hinge 4 so as to be openable and closable (the hinge 4 of the duct cover may be provided at an L-bent portion of the illustrated duct cover 5. A part of the base 3 is also added to the base body 1 so that it can have a U-shaped cross section and can be removably fitted from the side of the panel body 1). 6 and a lower cover 7.

A main circuit breaker 8 composed of a three-pole circuit breaker is fixed to the upper part of the panel body 1 with the power supply side terminal part facing upward, and a two-pole circuit breaker or earth leakage breaker is fixed below the main circuit breaker 8. Are fixed laterally in two rows on the left and right, with the load-side terminals facing outward. Window holes are provided in the protective covers 2a and 2b, and the opening / closing lever portions 8a and 9a of the circuit breakers 8 and 9 are respectively viewed from the window holes. The load side of the main circuit breaker 8 and the power supply side of the branch circuit breaker 9 are connected by a bus bar 10 (FIG. 2).

An electric wire connection device 11 described later in detail is integrally connected to each load side terminal of the branch circuit breaker 9.
The wire insertion port 12 is viewed outside through the side wall of the panel body 1. On both sides of the panel body 1 are the above-mentioned wire insertion ports 12
The electric wire duct 13 (FIG. 2) is defined by both ends of the base 3 and the duct cover 5 along. Then, as will be described later, the electric wires 14 of the secondary side wires whose terminal portions are inserted and connected to the electric wire insertion device 11 are gathered along the electric wire duct 13, and square holes 15 formed in the upper and lower covers 6 and 7.
(FIG. 3). The square hole 15
The square hole 16 for drawing in the trunk line is also flexibly closed by a rubber plate.

FIGS. 4 and 5 show the above-described configuration in more detail. FIG. 4 is an enlarged view of FIG. 2, and FIG. 5 is an enlarged perspective view of the main body of FIG. As shown in FIG. 4, the panel body 1 is fastened to the base 3 with screws 17 via the spacing pieces 18, and the protective cover 2 is easily fixed to the upper edge L bent portion of the panel body 1 by knurled screws 19. . On both sides of the base 3, duct covers 5
Of the duct cover 5 is fixed with screws.
The front end portion is easily closed and closed by a knurled screw 21 on the receiving metal 20.

On the other hand, as shown in FIG. 5, a notch 22 is formed in the side wall of the panel body 1 along the longitudinal direction.
The two electric wire insertion ports 12 of the electric wire connection device 11 peep outside. Empty space 2 at the upper end of notch 22
2a is left, and the trunk line is directly drawn out from this portion to another distribution board also serving as the main circuit breaker 8. Openings 23 at the upper and lower ends of the board body 1 are
And 25 are flexibly closed by a rubber plate 26 sandwiched between them.
FIG. 6 shows a connection diagram of the distribution board.

Next, referring to FIGS.
1 will be described. Here, FIG.
FIG. 8 is a front view of a main part viewed from the line VIII-VIII, and FIG. 9 is an exploded perspective view showing an electric wire connecting device 11 and a load-side terminal portion of a branch breaker 9 to which the electric wire connecting device 11 is connected. 10 is a perspective view showing a state in which these are integrally connected, and FIG. 11 is a diagram for explaining an operation when the electric wire 14 is removed from the electric wire connection device 11. 7 to 10, reference numeral 27 denotes a connection plate that relays between the terminal plate 28 of the branch circuit breaker 9 and the electric wire 14, and the terminal plate connection portion 27 a at the left end of FIG. A round hole 30 through which the terminal screw 29 passes is formed, and an inverted U-shaped support bracket 31 is joined to the right end wire connection portion 27b with which the wire 14 comes into contact by caulking at both leg ends.

A notch hole 32 for passing the electric wire 14 is formed in the right leg portion of the support fitting 31 in FIG. 7, and a rectangular window hole 33 is formed by cutting and bending the upper part toward the ceiling. I have. Inside the support bracket 31, a V-shaped retaining leaf spring 35 is provided similarly to an inverted J-shaped pressing leaf spring 34 made of a stainless steel plate for a spring. The pressing plate spring 34 has its base end bent in an L shape sandwiched and fixed between the left leg in FIG. 7 and the connection plate 27 when the support fitting 31 is crimped, and is bent in an arc shape. The tip is the wire 1 between the wire connecting portion 27b
4 are opposed to each other with a gap smaller than the diameter of the terminal portion 14a.

On the other hand, the retaining leaf spring 35 has a V-shaped bent portion with one leg extending along the ceiling surface of the support fitting 31 before the pressing leaf spring 34 is fixed.
3 and then fixed to the pressing leaf spring 34
The leg is sandwiched between the support bracket 31 and the ceiling of the support bracket 31, and is held in the state shown in FIG. In this state, the tip of the other leg of the retaining leaf spring 35 is opposed to the wire connecting portion 27b via a gap, similarly to the pressing leaf spring 34.

On the upper surface of the support fitting 31, a release button 36 made of a mold resin is slidably supported in a forward and backward direction (left and right in FIG. 7). The release button 36 is in the form of a block having substantially the same width as the support fitting 31 and has a rectangular operation concave portion 36a provided on the upper surface and a hook 36b integrally formed on the lower surface. On the other hand, support bracket 3
A slit 37 is provided in the ceiling of the hook 1 to allow the hook 36b to move in the front-rear direction, and a hole for fitting the hook 36b is formed in a leg of the retaining leaf spring 35 along the slit 37. Therefore, the release button 36 is fitted with the hook 36b into the hole of the retaining leaf spring 35 through the slit 37 as shown in the drawing, and slides integrally with the retaining leaf spring 35.

The connection plate 27, the support fitting 31, the pressing leaf spring 34, the retaining leaf spring 35, and the release button 3
6 is a terminal plate connecting portion 27a of the connecting plate 27.
Are covered with a housing 38 made of mold resin. A recess 39 is formed at two positions on the front surface of the housing 38 at the same phase interval as that of the terminal plate 28 of the branch circuit breaker 9. The assembly inserted into the recess 39 is provided in the width direction of the wire connection portion 7 b. A screw 40 screwed from the back of the housing 38 into a screw hole provided at an off-center position
It is fixed by. On the rear surface of the housing 38, the electric wire 5 is placed at a position facing the cutout hole 32 of the support fitting 31.
In parallel with the load side terminal plate 28 with respect to the wire connection portion 27b.
An electric wire insertion port 12 to be inserted is opened. The wire insertion port 12 has a large-diameter portion for accommodating the covering portion of the wire 14 and a tapered small-diameter portion for introducing the terminal portion 14a. A release button 3 is provided on the front of the housing 38.
An operation hole 41 is formed directly above the operation recess 36a of FIG.

In the electric wire connection device 11 having the above-described structure, the terminal plate connection portion 27a is integrally connected to the branch circuit breaker 9 as shown in FIG. As described above, the branch breaker 9 is fixed in the panel body 1 of the distribution board with the wire insertion port 12 being viewed outside. In order to connect the electric wire 14 to the branch circuit breaker 9, the knurled screw 21 (FIG. 4) is loosened, the duct cover 5 is opened as shown by a two-dot chain line in FIG. 14a is inserted from the electric wire insertion port 12 of the housing 38 through the cutout hole 32 of the support fitting 31, and between the pressing leaf spring 34 and the retaining leaf spring 35 and the electric wire connection portion 27b of the connection plate 27, the end face of the coating is inserted. Insert until it hits the small diameter part of mouth 12. The elastically deformed pressing leaf spring 34 presses the end portion 14a against the electric wire connection portion 27b at the tip of the arc-shaped portion to make contact with the required contact pressure, and at the same time, the retaining leaf spring 35 has It cuts into the surface of the portion 14a and acts as a stopper.

The electric wire 1 inserted and connected to the electric wire connection device 11
4 is pulled out, as shown in FIG.
Through the operation recess 36a, insert the tip of the driver 42 into the operation recess 36a, tilt the driver 42 to the left in FIG.
Slide to the right of the figure. Accompanying this, hook 36b
The retaining leaf spring 35 fitted to the
The bent head deeply enters the window hole 33 of the support fitting 31. As a result, the leg portion of the retaining leaf spring 35 that has bitten into the terminal portion 14a is pushed up by the lower edge 33a of the window hole 33 and rises from the terminal portion 14a, so that the electric wire 14 can be easily pulled out. When the driver 42 is removed, the release button 36 automatically returns to the state shown in FIG.

According to the configuration described above, the wire insertion port 1
2 can be connected to the load terminal of the branch circuit breaker 9 without removing the protective cover 2 because the connector 2 is looking outside through the side wall of the distribution board body 1. There is no fear that foreign matter such as dust adheres to a charged part such as the terminal and the terminal plate 28. The electric wire 14 is connected to the terminal 14
a can be connected with just one touch simply by inserting the wire plug 12 into the wire insertion port 12, so that the terminal screw 29 is loosened, the terminal portion 14a is sandwiched between the terminal plate 28, and the terminal screw 29 is tightened again while paying attention to the tightening torque. Wiring work becomes much simpler than work. Since the fastening between the terminal plate 28 and the connection plate 27 can be performed in the factory at the stage of shipment of the branch circuit breaker 9 by a screw tightening machine, there is no problem of complication as in manual work at a wiring site.

The distribution board shown in FIG. 1 shows a case where the wire insertion port 12 is viewed from both sides of the board body 1 in which the branch circuit breakers 9 are arranged in two rows on the left and right. FIG. Is horizontal 1
This is an embodiment in which the distribution boards are arranged in a row. In this case, the wire insertion port 12 is viewed from one side (lower side). Further, in the distribution board of FIG. 1, the connection plate 27 of the electric wire connection device 11 is directly fastened to the terminal of the branch breaker 9, but FIG.
As shown in (1), the branch circuit breaker 9 and the electric wire connection device 11 may be separated and fixed to the panel body 1, respectively, and the space therebetween may be connected. Further, FIG. 14 shows an embodiment in which a similar distribution board which also serves as the main circuit breaker 8 is added to the distribution board shown in FIG. 1, and a cutout space 22a on the side surface of the panel body 1 from the main circuit breaker 8 is provided.
(FIG. 5), the connecting terminal 43 is connected to the trunk line drawn out.
An additional distribution board is connected via the.

[0020]

According to the present invention, an electric wire connection device that allows one-touch insertion and connection of an electric wire is connected to the load terminal of the branch circuit breaker, and the electric wire insertion port of the electric wire connection device is connected to the outside through the side wall of the panel body. , It is possible to connect the secondary wiring wires to the branch circuit breaker without removing the protective cover of the panel body, and dust and wire debris on live parts such as busbars and circuit breaker terminals. There is no danger of foreign matter adhering. Further, since the screw connection work is not required for the connection of the above-mentioned electric wires, the man-hour for the wiring work is greatly reduced, and accidents such as breakage of the terminal screw due to excessive tightening force and heat generation due to insufficient tightening are eliminated. .

[Brief description of the drawings]

FIG. 1 is a front view of a distribution board showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

FIG. 3 is a top view of FIG. 1;

FIG. 4 is an enlarged view of FIG. 2;

FIG. 5 is an enlarged perspective view of a board main body in FIG.

FIG. 6 is a wiring diagram of the distribution board of FIG. 1;

FIG. 7 is a longitudinal sectional view of the electric wire connection device in FIG.

FIG. 8 is a front view of an essential part viewed from line VIII-VIII in FIG. 7;

9 is a perspective view of a terminal portion of the branch circuit breaker in FIG. 1 and the electric wire connection device of FIG. 7 connected thereto.

FIG. 10 is a perspective view of a state where the terminal portion of the branch circuit breaker in FIG. 1 and the electric wire connection device in FIG. 7 are connected.

FIG. 11 is a view for explaining an operation for removing an electric wire from the electric wire connection device of FIG. 7;

FIG. 12 is a schematic front view of the distribution board showing an embodiment in which the wire insertion port of the wire connection device is viewed from one side of the panel body.

FIG. 13 is a schematic front view of a distribution board showing an embodiment in which a terminal portion of a branch breaker and an electric wire connection device are separated and fixed to a panel body.

14 is a schematic front view of the distribution board showing an embodiment in which another distribution board that also serves as the main circuit breaker 8 is added to the distribution board shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel main body 2 Protective cover 3 Base 4 Hinge 5 Duct cover 6 Upper cover 7 Lower cover 8 Main circuit breaker 9 Branch circuit breaker 10 Bus bar 11 Electric wire connection device 12 Electric wire insertion port

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tatsuhiko Horiuchi 4-1-1-13 Honcho, Chuo-ku, Osaka City Inside Takenaka Corporation, Osaka Main Store (72) Ryoji Hayashi 4-1-1, Honmachi, Chuo-ku, Osaka-shi No. 13 Takenaka Corporation, Osaka Main Store (72) Inventor Yukio Nomoto 4-1-1, Honmachi, Chuo-ku, Osaka-shi Takenaka Corporation, Osaka Main Store (72) Inventor Shinji Takakawa 4-chome, Honmachi, Chuo-ku, Osaka No. 13 Takenaka Corporation Osaka Main Store (72) Inventor Seichi Ueki 4-7-45 Kami Shokakuji, Hirano-ku, Osaka City Inside Seiritsu Kogyo Co., Ltd. (72) Hiroaki Takenouchi Inventor Hiroaki Kamisho-shi, Osaka 4-7-45 Seiritsu Kogyo Co., Ltd. (72) Inventor Koiwana Meihichi 1-1-1 Tanabe Nitta, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Fuji Electric Co., Ltd. In-house (72) Inventor Yasutoshi Ide 1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. (56) References JP-A-4-295207 (JP, A) JP-A-4-295208 (JP) , A) JP-A-4-289708 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02B 1/40-1/42 H02B 1/20

Claims (1)

(57) [Claims] 1. A board body closed except for a front face, and a front face thereof
In a distribution board comprising a protective cover for covering a surface and a plurality of branch circuit breakers for branching wiring from a main line therein , one end is screw-connected to a load-side terminal plate of the branch circuit breaker.
Terminal plate connection part is formed, between the other end and the pressing leaf spring
How to connect the connection plate with the wire connection part that sandwiches the wire with
Wire in the housing
Wire difference to be inserted parallel to the load side terminal plate
The opening is opened, and the electric wire is inserted from this electric outlet.
By connecting the wire to the connection plate with one touch,
With connecting connection capable wire connecting device to the load side terminal plate <br/> of the branch circuit breaker, the electric wire insertion hole of the board main body
A distribution board characterized by being seen outside through the side wall .