JP3048770B2 - Circuit breaker wire connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for connecting an electric wire to a terminal of a circuit breaker or a switch used in low-voltage distribution equipment.

[0002]

2. Description of the Related Art FIG. 10 shows a conventional method for connecting an electric wire to a terminal of a circuit breaker. In FIG. 10 , 1
Is a circuit breaker such as a circuit breaker or a ground fault circuit breaker; 2 is a terminal plate disposed at a terminal portion thereof;
Reference numeral 4 denotes a terminal screw screwed into a, 4 denotes a washer integrally mounted on the terminal screw 3, and 5 denotes an electric wire connected to the terminal portion. Here, in order to connect the electric wire 5 to the terminal portion, conventionally, generally, the connection end portion 5a from which the insulating coating is removed is left as it is.
Alternatively, a crimp terminal (not shown) is attached, sandwiched between the terminal plate 2 and the washer 4, and the terminal screw 3 is tightened with a driver.

[0003]

However, the conventional method of tightening screws with a screwdriver requires a great deal of work by dropping and re-inserting terminal screws at a wiring site where working conditions are poor or paying attention to the tightening force. However, large panel equipment requiring a large number of electric wire connection operations required a large amount of man-hours. In particular, when changing wiring due to changes in load specifications after the panel is completed or after it has been put into operation, loosen the terminal screws, pull out the wires, and perform the connection work again. It was complicated and required a large number of work steps when the scale of change was large. In addition, the management of the tightening force of the terminal screws often depends on human intuition, and the terminal portion generates heat due to insufficient tightening force due to carelessness, which often leads to an accident. Therefore, the present invention provides an electric wire connection device for a circuit breaker that can perform one-touch connection and disconnection of an electric wire to and from a terminal portion of the circuit breaker, and that can always obtain a uniform contact pressure at the connection end of the electric wire. It is intended to provide.

[0004]

In order to achieve the above object, a wire connecting device according to the present invention has a terminal plate connecting portion which is fastened to a terminal plate of a circuit breaker at one end and a wire connection at the other end. wire connecting portion which the end contacts are formed, the
A short-circuit connected to the terminal board parallel to the operating surface of the circuit breaker
A book-shaped connection plate, a pressing leaf spring and a retaining leaf spring provided opposite to the electric wire connection portion of the connection plate, and covering these leaf springs and the electric wire connection portion of the connection plate. , parallel to the plate spring and the housing of the wire insertion insulator with a hole drilled for introducing connecting end portion of the wire between the wire connecting portion, and the connection plate in the housing
Is slidably accommodated in a part of the retaining plate
Contacts the housing, and shuts off the circuit of the housing.
Operation recess at the position facing the operation hole made on the operation panel side
And a release button part is provided, the Haujin
Through the wire insertion hole of the
The connection end of the inserted wire is
Ri pressed against the wire connecting portion and said retaining leaf spring
With blocking exit of the electric wire Mase write eating the connection end portion of the electric wire, the operation concave through the operation hole
Insert the tip of the tool into the
Slide the button to connect the wires
By deforming the retaining leaf spring that bites into the end,
Lines can be extracted (claim 1).

[0005] If a plurality of sets of leaf springs and electric wire insertion holes are provided for the connection plate of each pole, a plurality of loads can be easily connected to one circuit breaker. The electric wire connection device may be configured integrally with a plurality of poles or may be separately configured for each single pole. In this case, it is preferable to form an uneven portion on each housing to connect the housings of adjacent poles to each other. Good (claim 3).

[0006]

According to the present invention, there is provided a leaf spring for generating a contact pressure by pressing a connection end of an electric wire against the connection plate, the other end of which is fastened to a terminal plate of the circuit breaker, and a connection of the electric wire. A leaf spring that bites into the end to prevent the wire from coming off is provided, and a wire is inserted between the connection plate and the leaf spring through a wire insertion hole of the housing to perform connection. Since the connection is completed simply by inserting the wire, the work becomes one-touch, and the contact pressure of the electric wire against the connection plate is determined by the amount of deformation of the leaf spring, so there is no variation among persons. Turn the release button for the wire
Slide operation from the road circuit breaker operation surface
It can be easily pulled out by releasing the bite of the retaining leaf spring.
Wear.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Embodiment 1 FIGS. 1 to 5 show a basic embodiment of the present invention.
Figure 1 is a longitudinal sectional view, FIG. 2 is a fragmentary front view seen from the line II-II, FIG. 3 is wire connecting device connecting of Figure 1 of the wire connecting device
FIG. 4 is a side view of FIG. 3, and FIG.
Note that the same reference numerals are used for the portions corresponding to the conventional example. Here, the circuit breaker 1 of the embodiment is a two-pole type, and accordingly, the electric wire connection device 6 also has a structure in which two poles are integrally formed. 1 to 4, reference numeral 7 denotes a strip-shaped connection plate made of a copper plate.
A terminal plate connecting portion 7a to be fastened to the terminal plate 2 is formed at one end, and an electric wire connecting portion 7b to which the connecting end 5a of the electric wire 5 contacts is formed at one end. . The terminal plate connecting portion 7a is provided with a round hole or a U-shaped cutout groove through which the terminal screw 3 of the circuit breaker 1 passes.

An inverted U-shaped support fitting 8 made of a steel plate is connected to the electric wire connection portion 7b of the connection plate 7 by caulking at the ends of both legs. 1, a cutout hole 9 is formed in contact with the electric wire connection portion 7b, and a rectangular window hole 10 is formed in an upper portion of the support fitting 8 in a U-bend portion. ing. Reference numeral 11 denotes an inverted J-shaped pressing leaf spring provided to face the electric wire connection portion 7b of the connection plate 7, and reference numeral 12 denotes a V-shaped retaining leaf spring, both of which are formed of stainless steel springs. ing.
The pressing plate spring 11 has a base end bent in an L-shape and a left leg portion in FIG.
And the front end bent in an arc shape is opposed to the electric wire connecting portion 7b via a gap smaller than the diameter of the connecting end 5a of the electric wire 5.

On the other hand, before the retaining leaf spring 12 is fixed to the pressing leaf spring 11, the V-bend portion is formed so that one of the legs is along the ceiling surface of the support fitting 8, and the V-shaped bent portion is formed in the window hole 10.
Then, the leg is sandwiched between the pressing leaf spring 11 and the ceiling surface of the support fitting 8 which are fixed thereafter, and is held in the state shown in FIG. In this state, the tip of the other leg of the retaining leaf spring 12 faces the wire connecting portion 7b via a gap, similarly to the pressing leaf spring 11.

Reference numeral 13 denotes a housing made of a molded resin, and recesses 14 are formed at two positions on the front face at the same phase interval as the terminal plate 2 of the circuit breaker 1, and a connection plate 7, a support fitting 8, a pressing plate spring The connecting plate assembly including the retaining plate spring 11 and the retaining spring 12 is inserted into the concave portion 14 so as to be covered with the housing 13 except for the terminal plate connecting portion 7a of the connecting plate 7 as shown in FIG. A screw hole is provided at a position off the center in the width direction in the electric wire connection portion 7b of the connection plate 7, and the assembly is fixed from the back surface of the housing 13 by a screw 15 screwed into the screw hole. Further, on the back surface of the housing 13, a support fitting 8 is provided.
Wire insertion hole 1 for passing wire 5 at a position facing cutout hole 9
6 has been opened. The electric wire insertion hole 16 has a large diameter portion for accommodating the covering portion of the electric wire 5 and a tapered small diameter portion for introducing the connection end 5a.

Further, in FIG. 1, a space is provided above the support fitting 8 in the housing 13, and a lease button 17 made of a molding resin is provided in this space in parallel with the connection plate 7.
It is slidably housed in. Release button 17
Has a square operation concave portion 17a on the upper surface, and a hook 17b formed integrally with the lower surface. A rectangular operation hole 18 is formed at a position of the housing 13 facing the operation concave portion 17a. A slit 19 is formed in the ceiling of the support bracket 8 to escape the movement of the hook 17b in the front-rear direction, and a hole for fitting the hook 17b is formed in the leg of the retaining spring 12 along the slit. I have.

In order to combine the release button 17 as shown in the figure, before inserting the release button 17 into the housing 13, the hook 17 b is fitted into the hole of the retaining spring 12 through the slit 19 while the release button 17 is tilted to the front right in the figure. Combine. Thereafter, the connecting plate assembly is inserted and fixed in the housing 13, and the release button 17 is guided by the upper surface of the support fitting 8 and the wall surface of the housing recess 14 so as to slide integrally with the retaining spring 12.

The wire connection device 6 includes a terminal plate connection portion 7a.
Are mounted on the circuit breaker 1 in advance by being fastened to the terminal plate 2 with the terminal screws 3. At that time, the housing 13
3 and FIG. 4, the side surface and the upper surface coincide with the corresponding surfaces of the case of the circuit breaker 1, and are shaped so that a sense of unity can be obtained therebetween.

In order to connect the electric wire 5 to the circuit breaker 1 under such a configuration, the connection end portion 5a, which is removed by a specified size, is connected to the electric wire insertion hole 16 of the housing 13 and the notch hole of the support fitting 8. 9, the cover is inserted between the pressing leaf spring 11 and the retaining leaf spring 12 and the wire connecting portion 7 b of the connecting plate 7 until the end face of the covering comes into contact with the small diameter portion of the wire insertion hole 16. The elastically deformed pressing leaf spring 1
Reference numeral 1 denotes an arc-shaped portion at the tip, which presses the connection end 5a against the electric wire connection portion 7b to make contact with a required contact pressure. At the same time, the edge of the retaining leaf spring 11 bites into the surface of the connection end 5a. It acts as a retainer.

According to the illustrated configuration, the connection of the electric wire 5 is completed only by the insertion operation, so that the wiring operation becomes extremely simple.
Further, since the contact pressure with the electric wire connection portion 7b is constant depending on the amount of deformation of the pressing leaf spring 11, there is no fear of heat generation due to insufficient pressurization. Since the electric wire connection device 6 is mounted on the circuit breaker 1 at a factory stage, the connection plate 7 is quickly tightened by the terminal screw 3 with a predetermined torque by a screw machine, and manually tightened at a wiring site. The above-mentioned problems do not arise.

Next, the operation of the release button 17 will be described below. In FIG. 1, the retaining leaf spring 12 bites into the connection end 5a, and the electric wire 5 does not come off easily even if it is pulled. Therefore, when the electric wire 5 is pulled out, as shown in FIG.
7a, the tip of the driver 20 is inserted, the driver 20 is tilted to the left in the figure, and the release button 17 is slid to the right in the figure. Along with this, the retaining leaf spring 12 moves to the right together, and goes deeply into the window hole 10 of the support fitting 8. As a result, the retaining leaf spring 1 that bites into the connection end 5a
The two leg portions are pushed up by the lower edge 10a of the window hole 10 and float up from the connection end portion 5a. Thereby, the electric wire 5 can be easily pulled out. If you remove the driver 20,
The release button 17 automatically returns to the state of FIG. 5 by the restoring force of the retaining leaf spring 12.

The circuit breaker 1 is usually installed in the panel vertically or horizontally with the operation surface from which the open / close handle 1a (FIGS. 3 and 4) protrudes in the front, and the operator operates the handle from the near side. It is supposed to. Therefore, in the illustrated embodiment, the operability is improved by inserting the driver 20 from the same operation surface of the open / close handle 1a of the circuit breaker 1 as the release button 17 as well. By the way, if the driver 20 is inserted from the side where the electric wire 5 is inserted, for example, the handle portion is a panel panel, an attaching member,
It is difficult to operate when hitting other devices.

Embodiment 2 FIGS. 9 and 10 show an embodiment in which a plurality of sets of leaf springs and electric wire insertion holes are provided for the connection plates of each pole. FIG. 9 shows a main part of the electric wire connection device. FIG. 10 is a rear view of a cutaway plan view. In this embodiment, as shown in FIG. 9, two support fittings 8 arranged on the left and right are fixed to the electric wire connection portion 7b of the connection plate 7 of each pole, and a pressing leaf spring 11 (not shown in the drawing) and A retaining leaf spring 12 is mounted. The housing 13 is provided with two electric wire insertion holes 16 corresponding to each pole. According to such a configuration, even when a plurality of loads are connected to the load side of one circuit breaker, a contact pressure can be independently applied to each wire, and a plurality of wires can be connected with the same terminal screw. The contact reliability is increased as compared with the conventional method of fastening together.

Embodiment 3 Finally, FIGS. 11 and 12 show an embodiment in which the electric wire connecting device is separately configured for each single pole. FIG. 11 shows a state in which two single electric wire connecting devices are connected. FIG. 12 is a perspective view showing
FIG. 3 is a perspective view showing a state in which this is mounted on a circuit breaker. In the first to third embodiments, the two-pole connection plate 7 is integrally formed by one housing 13, but in this embodiment, the housing 13 is different for each connection plate 7. In each housing 13, a dovetail-shaped concave portion 13a and a convex portion 13b are integrally formed on the left and right side surfaces, and the adjacent poles are connected to each other as shown in the drawing by meshing these. According to such a configuration,
By simply preparing one type of wire connection device, an arbitrary number of poles can be freely configured according to the number of poles of the circuit breaker.

[0020]

As described above, according to the present invention, since the electric wires can be connected by one-touch operation, the number of wiring steps can be greatly reduced, and a constant contact pressure can be always obtained no matter who is connected. The contact reliability of the wiring is improved. Then, operate the release button from the operation side of the circuit breaker.
By being incorporated as much as possible, the removal operation of the electric wire is easy and one-touch, and the man-hour when changing the wiring is reduced. In addition, since a plurality of electric wires can be inserted for each pole, reliability in distributing power from one circuit breaker to a plurality of loads is improved. Furthermore, if a configuration is made so as to obtain an arbitrary number of poles by connecting components separately configured for each single pole, cost reduction can be achieved as compared to a case where production is performed separately for each pole, and management is easy. Productivity is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an electric wire connection device according to a first embodiment of the present invention.

FIG. 2 is a front view of an essential part taken along line II-II in FIG.

FIG. 3 is a plan view of a circuit breaker equipped with the wire connection device of FIG. 1;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a diagram showing a state when a release button in FIG. 1 is operated.

FIG. 6 is a plan view in which main parts of an electric wire connection device according to a second embodiment of the present invention are cut away.

FIG. 7 is a rear view of FIG. 7;

FIG. 8 is a perspective view of an electric wire connection device according to a third embodiment of the present invention.

FIG. 9 is a perspective view of a terminal portion of the circuit breaker to which the wire connection device of FIG. 8 is mounted.

FIG. 10 is a perspective view of a terminal portion of a circuit breaker for explaining a conventional electric wire connection method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Terminal board 3 Terminal screw 5 Electric wire 6 Connection board 7a Terminal board connection part 7b Wire connection part 7 Support bracket 11 Pressing leaf spring 12 Retaining leaf spring 13 Housing 16 Electric wire insertion hole 17 Release button 20 Driver

Continued on the front page (72) Inventor Tatsuhiko Horiuchi 4-1-1-13 Honcho, Chuo-ku, Osaka-shi Takenaka Corporation Osaka Main Store (72) Inventor Seiichi Ueki 4-7-17 Kami Shokakuji, Hirano-ku, Osaka-shi Inside Seiritsu Kogyo Co., Ltd. (72) Inventor Hiroaki Takenouchi 4-7-45 Kami Shokakuji, Hirano-ku, Osaka City Inside Seiritsu Kogyo Co., Ltd. (72) Meiji Koanaka 1-1 1-1 Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Inside Electric Co., Ltd. (72) Inventor Yasutoshi Ide 1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. (72) Inventor Yoshiaki Kawashima 1-1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Inside Electric Co., Ltd. (72) Inventor Shuichi Watanabe 1-1, Tanabe Nitta, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. (56) References JP-A-58-164178 (JP, A) JP-A-2- 201878 (JP, A) Fully open Showa 51-28489 (JP, U) Really open Showa 51-5991 (JP, U) (5 8) Field surveyed (Int.Cl. ⁷ , DB name) H01R 9/24 H01R 4/48

Claims (3)

(57) [Claims] 1. An operation surface of the circuit breaker , wherein one end has a terminal plate connection portion which is fastened to a terminal plate of the circuit breaker, and the other end has a wire connection portion with which a connection end of the wire contacts.
A strip-shaped connecting plate connected to the terminal plate in parallel with the terminal plate; a pressing leaf spring and a retaining leaf spring provided opposite to the electric wire connecting portion of the connecting plate; covering and said wire connecting portion of the plate, and the housing of the leaf spring and the wire connecting portion and the cable insertion insulator with a hole drilled for introducing connecting end portion of the wire between, in this housing Slidable parallel to the connection plate
It is housed and a part comes in contact with the retaining leaf spring.
Opened on the operation side of the circuit breaker of the housing
With an operation recess at the position facing the operation hole
A lease button, and operating the circuit breaker through a wire insertion hole of the housing.
Press the connection end of the wire inserted parallel to the
Te pressed by the leaf spring on the wire connecting portion, also with blocking exit of the exit said stop plate spring Mase write eating the connection end portion of the wire cable, through the operation hole
Insert the tip of the tool into the operation recess, and
Slide the release button
Detach the retaining spring that bites into the connection end of the wire.
A wire connection device for a circuit breaker, wherein the wire can be extracted . 2. A method according to claim 1, characterized in that a plurality of sets of the leaf springs and the wire insertion hole is provided for connection plate of each pole
An electric wire connection device for a circuit breaker according to the above. 3. is another configuration for each unipolar, to each of the housing, characterized in that the uneven portion for being connected to each other and the adjacent pole housing is formed according to claim 1 or claim
Item 3. An electric wire connection device for a circuit breaker according to Item 2 .