JP3909974B2 - Automatic circuit breaker device for wiring - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic closing device for a circuit breaker for wiring.
[0002]
[Prior art]
As shown in FIG. 9, a conventional automatic circuit breaker for a wiring breaker has a solenoid 2 arranged in series with a wiring breaker 1, a plunger 3 of the solenoid 2, a handle 4 of the wiring breaker 1, Are connected by a link 5. However, since the handle 4 is directly operated by the solenoid 2, there is a problem that a long stroke is required for the solenoid 2 and a large solenoid 2 is required.
[0003]
In addition, as shown in FIG. 10, such a conventional device must have a stepped structure in order to install the solenoid 2 at the same height as the handle 4 of the wiring breaker 1. There is a problem that the distance from the surface 6 increases and the space efficiency is poor. In addition, since the mechanism portion such as the link 5 comes on the wiring of the circuit breaker 1 for wiring, there is a problem in terms of insulation.
[0004]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-described conventional problems, and to provide an automatic closing device for a circuit breaker that does not require a large solenoid, can reduce the installation space, and is less prone to malfunction. Is.
[0005]
[Means for Solving the Problems]
The present invention, which has been made to solve the above-mentioned problems, has a solenoid with a plunger opening facing down on the side of a circuit breaker arranged vertically with the operating direction of the handle as the vertical direction. An automatic closing device for wiring breakers in which the plunger and the operating arm of the handle are connected by a link mechanism so that the solenoid is deenergized except during operation so that the operating arm is on the off position side of the handle it is characterized in that the.
[0006]
The automatic circuit breaker for a circuit breaker according to the present invention has a structure in which the solenoid is installed on the side of the circuit breaker and the operating arm of the handle is driven via the link mechanism, so the stroke of the solenoid may be short. . Moreover, since the solenoid and the circuit breaker for wiring can be mounted on the same surface, the installation space can be reduced. Furthermore, since the opening of the solenoid plunger faces downward, it is difficult for rainwater and dust to enter, and malfunction is unlikely to occur. Further, since the horizontal arm is located away from the handle of the circuit breaker except during operation, there is no possibility that the handle is prevented from moving to the off position due to overcurrent.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention are shown below.
1 to 3 are views showing a first embodiment of the present invention, wherein 10 is a vertical base fixed to a wall surface, and 11 is a circuit breaker arranged vertically on the base 10. is there. The circuit breaker 11 for wiring is arranged with the operation direction of the handle 12 in the vertical direction (the upper side is on and the lower side is off). At the side of the circuit breaker 11 for wiring, the solenoid 13 of the automatic closing device of the present invention is installed with the opening of the plunger 14 facing downward.
[0008]
An L-shaped bracket 15 is attached to the side surface of the solenoid 13 on the wiring breaker 11 side, and an operating arm 17 is pivotally supported by a pin 16 below the bracket. The operating arm 17 is provided with a horizontal arm 18 at the top, and is positioned below the handle 12 so that the handle 12 in the off position of the wiring breaker 11 can be moved to the on position.
[0009]
A connecting member 19 for driving the operating arm 17 in the vertical direction is provided on the side surface of the bracket 15 so as to be slidable in the vertical direction, thereby constituting a driving link mechanism. The connecting member 19 is formed by bending a metal plate as shown in FIG. 2. One end is connected to the tip of the plunger 14 by a pin 20, and the other end is connected to the intermediate portion of the operating arm 17 by a pin 21. It is pivotally attached. However, a clearance sufficient to convert the linear motion of the connecting member 19 into the swing motion of the operating arm 17 is formed between the pin 21 and the operating arm 17.
[0010]
The horizontal arm 18 of the operating arm 17 is preferably provided with a cushioning material on the contact surface with the handle 12 to weaken the impact on the handle 12. Also, as shown in FIGS. 4 and 5, it is preferable to stack the operation electronic circuit board 22 and the solenoid 13 to reduce the installation space and reduce the size.
[0011]
The automatic closing device of the first embodiment configured as described above makes the solenoid 13 non-energized except during operation, the plunger 14 hangs downward due to its own weight, and the connecting member 19 also moves downward. Therefore, the horizontal arm 18 at the tip of the operation arm 17 is also in the lower position , that is , the off position side of the handle . In this state, since the opening of the plunger 14 faces downward, rainwater and dust are less likely to enter, and there is an advantage that malfunction is unlikely to occur. Further, since the horizontal arm 18 is located away from the handle 12 of the wiring breaker 11, there is no possibility that the handle 12 is prevented from moving to the off position due to overcurrent .
[0012]
Next, when the circuit breaker 11 for wiring is automatically turned on, a signal is sent to move the plunger 14 of the solenoid 13 upward, and the operating arm 17 is swung upward via the connecting member 19. Along with this, the handle 12 of the wiring breaker 11 in which the horizontal arm 18 was in the off position can be moved to the on position, and automatic insertion can be performed. At this time, since the stroke of the plunger 14 is expanded by the operating arm 17, the long stroke solenoid 13 is unnecessary, and the solenoid 13 can be mounted on the same base 10 on the side of the circuit breaker 11 for wiring. The overall size can be reduced.
[0013]
6 to 8 are views showing a second embodiment of the present invention.
In the second embodiment, the operating arm 17 is pivotally supported by a pin 30 at an intermediate position thereof, and a link including a first link 31 and a second link 32 is provided between the lower end thereof and the plunger 14 of the solenoid 13. It is connected by a mechanism. The first link 31 is slidable in the vertical direction along the bracket 15, and its upper end is connected to the lower end of the operating arm 17 by a pin 33.
[0014]
The second link 32 has a central portion pivotally supported by a U-shaped bracket 34 erected on the base 10 by a shaft pin 37 and swings in a vertical plane. The first link 31 is connected to the lower end, and the other end is connected to the tip of the plunger 14 of the solenoid 13 by a pin 36.
[0015]
Also in this second embodiment, the solenoid 13 is not energized except during operation, the plunger 14 hangs downward due to its own weight, and the tip of the operating arm 17 is positioned at the lower position via the link mechanism. The handle is moved to the off position side . In this state, since the opening of the plunger 14 faces downward, rainwater and dust are unlikely to enter, as in the first embodiment.
[0016]
When the circuit breaker 11 is automatically turned on, if the plunger 14 of the solenoid 13 is moved upward, the second link 32 swings about the shaft pin 37 and takes the position shown in FIG. Accordingly, the first link 31 is moved downward, so that the tip of the operating arm 17 is swung upward. Along with this, the handle 12 of the wiring breaker 11 in which the horizontal arm 18 was in the off position can be moved to the on position, and automatic insertion can be performed. At this time, since the stroke of the plunger 14 is enlarged by the link mechanism, the long stroke solenoid 13 is unnecessary, and the solenoid 13 can be mounted on the same base 10 on the side of the circuit breaker 11. The point that the whole size can be reduced is the same as that of the first embodiment.
[0017]
【The invention's effect】
As described above, the automatic circuit breaker for a circuit breaker according to the present invention does not require a large solenoid because the stroke of the solenoid can be expanded by the link mechanism. Further, since the solenoid is installed on the side of the circuit breaker for wiring, the installation space can be reduced. Moreover, since the plunger opening is downward, rainwater and dust are difficult to enter, and it is difficult to cause malfunctions . There are many advantages, such as the possibility that an overcurrent does not prevent the handle from moving to the off position.
[Brief description of the drawings]
FIG. 1 is a front view showing a first embodiment.
FIG. 2 is a bottom view of FIG.
FIG. 3 is a side view of FIG. 1;
FIG. 4 is a front view showing a stacked state of the operation electronic circuit board.
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a front view showing a second embodiment.
7 is a bottom view of FIG. 6. FIG.
8 is a side view of FIG. 6. FIG.
FIG. 9 is a plan view showing a conventional example.
FIG. 10 is a front view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Circuit breaker for wiring 2 Solenoid 3 Plunger 4 Handle for circuit breaker 5 Link 6 Mounting surface 10 Base 11 Circuit breaker 12 Handle for circuit breaker 13 Solenoid 14 Plunger 15 Bracket 16 Pin 17 Operating arm 18 horizontal arm 19 connecting member 20 pin 21 pin 22 operation electronic circuit board 30 pin 31 first link 32 second link 33 pin 34 U-shaped bracket 35 pin 36 pin 37 axis pin

Claims (4)

A solenoid with the plunger opening facing downward is placed on the side of the circuit breaker that is vertically arranged with the handle operating direction as the vertical direction, and the plunger and handle operating arm are connected by a link mechanism. A circuit breaker automatic closing device, wherein the solenoid is de-energized except during operation, and the operating arm is on the handle off position side. . Operating arm automatic dosing device MCCB according to claim 1, wherein is provided a cushioning material to weaken the impact of the handle. 2. The circuit breaker according to claim 1, wherein the operating arm is pivotally supported by the bracket, and the link mechanism includes a connecting member that slides along a side surface of the solenoid and directly drives the operating arm vertically by a plunger . Automatic feeding device. A vertical link in which the operating arm is pivotally supported by the bracket, the link mechanism drives the operating arm in the vertical direction, one end is connected to the first link, and the other end is connected to the plunger. 2. The automatic circuit breaker for a circuit breaker according to claim 1, further comprising a second link which swings at a position .

Images