JP2000268696A - Automatic closing device for molded-case circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic closing device for a molded-case circuit breaker, not requiring a large-sized solenoid, enabling space for installation to be reduced, and less liable to cause failured operation. SOLUTION: A molded-case circuit breaker 11 is vertically disposed so that a handle 12 is operated in the vertical direction, and a solenoid 13 is disposed on the side thereof with its opening part for a plunger 14 downward oriented, A link mechanism is provided between an operating arm 17 for moving the handle 12 and the plunger 14, and the operating arm 17 is driven as the stroke of the solenoid 13 is enlarged. The link mechanism may be made up of link members only or may be made up of first and second links.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic closing device for a circuit breaker for wiring. 2. Description of the Related Art As a conventional automatic circuit breaker for a wiring breaker, a solenoid 2 is arranged in series with a wiring breaker 1 as shown in FIG. The thing which connected the handle 4 of the circuit breaker 1 with the link 5 is known. 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] Further, in such a conventional circuit breaker, as shown in FIG. 10, the solenoid 2 must be provided with a stepped structure in order to be installed at the same height as the handle 4 of the circuit breaker 1 for wiring. There is a problem that the distance from the first mounting surface 6 becomes large and the space efficiency is poor. In addition, since the mechanical section such as the link 5 comes on the wiring of the circuit breaker 1, there is a problem in terms of insulation. [0004] The present invention solves the above-mentioned conventional problems, does not require a large-sized solenoid, can reduce the installation space, and is less likely to cause malfunctions. The purpose of the present invention is to provide an automatic dispensing device for containers. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. According to the present invention, a plunger is provided at the side of a wiring breaker which is vertically arranged with the operating direction of a handle vertically. A solenoid having an opening facing downward is arranged, and the plunger and the operating arm of the handle are connected by a link mechanism. An automatic closing device for a circuit breaker according to the present invention comprises:
Since the solenoid is installed on the side of the wiring breaker and the operating arm of the handle is driven via the link mechanism,
The stroke of the solenoid may be short. Further, since the solenoid and the circuit breaker can be mounted on the same surface, the installation space can be reduced. Further, since the opening of the plunger of the solenoid is directed downward, rainwater and dust are less likely to enter, and malfunctions are less likely to occur. Preferred embodiments of the present invention will be described below. 1 to 3 are views showing a first embodiment of the present invention, in which 10 is a vertical base fixed to a wall surface, and 11 is a circuit breaker for wiring arranged vertically on the base 10. is there.
The wiring breaker 11 is arranged such that the operation direction of the handle 12 is up and down (upside is on, lower side is off). A solenoid 13 of the automatic closing device of the present invention is installed on the side of the circuit breaker 11 with the opening of the plunger 14 facing downward. An L-shaped bracket 15 is attached to a side surface of the solenoid 13 on the side of the circuit breaker 11, and an operating arm 17 is pivotally supported by a pin 16 at a lower portion thereof. The operation arm 17 has a horizontal arm 18 at an upper portion, and is located below the handle 12 so that the handle 12 at the off position of the circuit breaker 11 can be moved to the on position. A connecting member 19 for driving the operation 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, and forms a link mechanism for driving. The connecting member 19 is formed by bending a metal plate as shown in FIG.
4 is connected to a tip of the operation arm 17 by a pin 20 and the other end is pivotally connected to an intermediate portion of the operation arm 17 by a pin 21. However, a sufficient clearance is formed between the pin 21 and the operation arm 17 so that the linear movement of the connecting member 19 can be converted into the swinging movement of the operation arm 17. 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 reduce the impact on the handle 12. 4 and 5, the operation electronic circuit board 22 and the solenoid 13 are stacked,
It is preferable to reduce the installation space and reduce the size. In the automatic loading device of the first embodiment configured as described above, the plunger 14 always hangs downward due to its own weight, and the connecting member 19 also moves downward. Is also in the lower position. In this state, since the opening of the plunger 14 is directed downward, there is an advantage that rainwater and dust hardly enter, and an operation failure hardly occurs. Further, since the horizontal arm 18 is located at a position away from the handle 12 of the circuit breaker 11 for wiring, there is no possibility that the handle 12 is prevented from moving to the off position due to an overcurrent. In addition to this, a return spring that causes the plunger to hang down by a spring force and move the connecting member downward may be used. Next, when the wiring breaker 11 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 through the connecting member 19. Along with this, the handle 12 of the circuit breaker 11 with the horizontal arm 18 at the off position can be moved to the on position, and automatic closing can be performed. At this time, since the stroke of the plunger 14 is enlarged by the operation arm 17, the solenoid 13 having a long stroke is unnecessary, and the solenoid 13 can be mounted on the same base 10 beside the circuit breaker 11 for wiring. Thus, the overall size can be reduced. FIGS. 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 between the operating arm 17 and the plunger 14 of the solenoid 13 through the first link 3.
They are connected by a link mechanism including the first and second links 32. The first link 31 can slide up and down along the bracket 15, and the upper end thereof has the operation arm 1.
7 and a pin 33. The second link 32 is pivotally supported at the center by a shaft pin 37 on a U-shaped bracket 34 erected on the base 10 and swings in a vertical plane. It is connected to the lower end of the first link 31 by the pin 35,
The other end of the plunger 1 of the solenoid 13 is
4 is connected to the tip. The automatic loading device according to the second embodiment is also in a state where the plunger 14 always hangs down due to its own weight, and the tip of the operating arm 17 is moved to the lower position via the link mechanism. In this state, it is difficult for rainwater or dust to enter because the opening of the plunger 14 is downward, as in the first embodiment. When the wiring breaker 11 is automatically turned on, the plunger 14 of the solenoid 13 is moved upward, so that the second link 32 swings around the shaft pin 37 and the position shown in FIG. Since the first link 31 is moved downward with this, the tip of the operation arm 17 is swung upward. Along with this, the handle 12 of the circuit breaker 11 with the horizontal arm 18 at the off position can be moved to the on position, and automatic closing can be performed. At this time, plunger 1
Since the stroke of No. 4 is expanded by the link mechanism, a long-stroke solenoid 13 is not required, and the solenoid 13 can be mounted on the same base 10 beside the circuit breaker 11 for wiring, so that the overall size is small. This is also the same as the first embodiment in that it can be implemented. As described above, the automatic closing device for a circuit breaker of the present invention does not require a large solenoid since the stroke of the solenoid can be expanded by the link mechanism. Also, since the solenoid is installed on the side of the circuit breaker, the installation space can be reduced. Moreover, since the opening of the plunger is downward, it is difficult for rainwater and dust to enter and malfunctions occur.In addition, when the solenoid is not energized except during operation, the operating arm is in the off position of the handle. There are many advantages, such as that there is no possibility that the handle is prevented from being moved to the off position due to an overcurrent.

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 operation electronic circuit boards. FIG. 5 is a side view of FIG. 4; FIG. 6 is a front view showing a second embodiment. FIG. 7 is a bottom view of FIG. 6; FIG. 8 is a side view of FIG. 6; FIG. 9 is a plan view showing a conventional example. FIG. 10 is a front view showing a conventional example. DESCRIPTION OF SYMBOLS 1 Wiring circuit breaker 2 solenoid 3 Plunger 4 Wiring circuit breaker handle 5 Link 6 Mounting surface 10 Base 11 Wiring circuit breaker 12 Wiring circuit breaker handle 13 Solenoid 14 Plunger 15 Bracket in prior art 16 pin 17 operating arm 18 horizontal arm 19 connecting member 20 pin 21 pin 22 operating 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 (1)

Claims 1. A solenoid having an opening of a plunger facing downward is disposed on a side of a wiring breaker vertically arranged with an operating direction of a handle vertically, and the plunger and the handle are disposed. An automatic closing device for a circuit breaker for wiring, characterized in that a link mechanism is connected to the operation arm of the wiring breaker. 2. The automatic closing device for a circuit breaker for wiring according to claim 1, wherein the operation electronic circuit board and the solenoid are stacked. 3. The automatic closing device for a circuit breaker according to claim 1, wherein the solenoid is de-energized except during operation, and the operating arm is at an off position side of the handle. 4. The automatic closing device for a circuit breaker for wiring according to claim 1, wherein a cushioning material is provided on the operation arm to reduce an impact on the handle. 5. The operation arm according to claim 1, wherein the operation arm is pivotally supported by the bracket, and the link mechanism slides along a side surface of the solenoid, and comprises a connecting member that directly drives the operation arm vertically by a plunger. Automatic closing device for wiring breaker. 6. An operating arm pivotally supported by a bracket, wherein a link mechanism drives the operating arm in a vertical direction, one end is connected to the first link, and the other end is connected to a plunger. The automatic closing device for a circuit breaker according to claim 1, further comprising a second link that swings in a vertical plane.