JPS6132773B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an external operating mechanism in a circuit or disconnector.

Conventionally, there have been the external operating mechanisms for this type of circuit and disconnector as shown in FIGS. 1, 2, and 3. In Figures 1 to 3, 1 is a circuit breaker installed in the panel, 2 is a circuit breaker that opens and closes 1, and 3 is a circuit breaker that opens and closes 2. An operation handle for performing operations from outside the panel; 4 is an operation plate fixed to the operation handle 3 and rotates together with the operation handle 3; 5 is a pin fixed to the operation plate 4; 6 is a handle for rotating operation. A slide plate 7 converts the rotational movement of the holder into a reciprocating movement via the operation plate 4 and a connecting mechanism consisting of a pin 5 and an elongated hole 6a. 10 is a lock lever that is always engaged with the hook 7a of the door lock fitting 7; 11 is a door lock fitting that holds the operating handle 3, slide plate 6, lock lever 10, etc., and A mounting frame 12 is fixed to the circuit breaker 1, and the door lock hook 7a and the lock lever 10 are connected to each other when the circuit breaker 1 is opened and closed.
is a return spring that engages the lock lever 10.
and is hung on the mounting frame 11.

Next, the operation will be explained. In FIGS. 1 and 2, when the operating handle 3 is rotated clockwise, the operating plate 4 fixed to the operating handle 3 also rotates clockwise, and the pin 5 fixed to the operating plate 4 is moved to the slide plate 6. The slide plate 6 is moved upward in FIG. 1 by sliding through the provided elongated hole 6a. Furthermore, a square hole 6b is provided in the center of the slide plate 6 to engage with the handle 2, and as the slide plate 6 moves, the handle 2 also moves upward in FIG. Close the container.

From the above state where the circuit or disconnector is closed,
When the operation handle 3 is rotated counterclockwise, the operation plate 4 is also rotated counterclockwise, and the pin 5 fixed to the operation plate 4 moves the slide plate 6 downward in FIG. 2 also moves downward in FIG. 1 to open the circuit breaker.

In normal opening and closing operations in Figure 2,
The lock lever 10 is engaged with the door lock hook part 7a and cannot open the door, but when opening the door for inspection or repair inside the panel, turn the operating handle 3 in the counterclockwise direction. Beyond the open position of the disconnector, the operation plate 4 comes into contact with the lock lever 10, displacing the lock lever 10, and as shown in FIG.
It is necessary to rotate the operating handle 3 until it comes off and hold the operating handle 3 in that state. When you release your hand from the handle 3, the return spring 12 acts on the circuit and the restoring force of the disconnector 1 to the open position and locks the door. Hook portion 7a of metal fitting 7
The lock lever 10 is engaged and the door cannot be opened.

The external operating mechanism of conventional circuits and disconnectors is configured as described above, so when opening the door, for example, hold the operating handle with your right hand while rotating it to the door open position, and hold it with your left hand. There was an inconvenience that one person could not open the door when two or more circuits or disconnectors were installed in the same panel.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional ones.A lock lever retaining pawl is fixed to a slide plate, and when the operating handle is operated to open the door, the aforementioned retaining pawl advances. By locking into the locking part provided on the lock lever and preventing the lock lever from returning to the engagement position with the door lock fitting, it is necessary to hold the operating handle in the door closed position when opening the door. To provide an external operating mechanism for circuits and disconnectors that allows one person to open the door even when there are no circuits and disconnectors installed in the same panel.

An embodiment of the present invention will be described below with reference to the drawings. 4, 5, 6, and 7, numerals 1 to 9 and 11 are exactly the same as those of the conventional device, and the lock lever 10 is provided with a lock lever protrusion 10a which is a locking portion. Reference numeral 13 designates a lock lever retaining pawl that holds the lock lever protrusion 10a when the operating handle 3 is rotated counterclockwise until the lock lever 10 is disengaged from the hook portion 7a of the door lock fitting 7; Fixed.

Since the circuit shield and disconnector external operating mechanism of the present invention is constructed as described above, in order to open the door, the operating handle 3 is turned counterclockwise until the lock lever 10 and the hook portion 7a of the door lock fitting 7 engage with each other. It is no different from the conventional method that it rotates to the state shown in Figure 5, where it comes off.
In this invention, at the same time as the above-mentioned engagement is released, the lock lever retaining pawl 13 fixed to the slide plate 6 is engaged with the lock lever protrusion 10a, and the lock lever 10 is prevented from returning to the engagement position with the door lock fitting 7. prevent. Therefore, even if the counterclockwise rotational force applied to the operating handle 3 is removed and the operating handle 3 returns to the open position due to the open position restoring force of the circuit and disconnector, the door lock fitting hook 7a and the lock lever 10 The engagement remains disengaged as shown in FIG. 6, and the door can be opened without holding the operating handle 3. Furthermore, when the interior of the panel is inspected or repaired, the door is closed, the operating handle 3 is turned clockwise to close the disconnector 1, and the slide plate 6 moves upward in FIG. , the lock lever latching pawl 13 fixed to the slide plate 6 also moves upward in FIG. The hook portion 7a of the lock lever 10 engages with the lock lever 10 to return to the normal state as shown in FIG.

As described above, according to this invention, once the operating handle is rotated to the door open position, the door lock remains unlocked even if the hand is released, making it possible to open the door with just one hand. Furthermore, even if there are many circuits and disconnectors in the same panel, one person can open the door.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional side view of a conventional circuit breaker external operating mechanism with the circuit breaker in the open position, Figure 2 is a plan view of Figure 1, and Figure 3 is a conventional circuit breaker. FIG. 4 is a plan view of the external operating mechanism in the door open position, FIG. 4 is a cross-sectional side view of the circuit breaker external operating mechanism according to an embodiment of the present invention with the circuit breaker in the open position, and FIG. FIG. 6 is a plan view of the circuit breaker in the open position according to an embodiment of the present invention; FIG. FIG. 7 is a plan view of the circuit breaker or breaker when it is returned to the open position by force, and FIG. 7 is a plan view of the circuit breaker or breaker in the closed position according to an embodiment of the present invention. In the figure, 1 is a circuit cutter, 2 is a handle, 3 is an operating handle, 4 is an operating panel, 5 and 6a are a connecting mechanism, and 6
is a slide plate, 7 is a door lock metal fitting, 7a is a door lock metal hook part, 8 is a door plate, 9 is a flash plate,
10 is a lock lever, 10a is a lock lever protrusion (locking portion), 11 is a mounting frame, 12 is a return spring, and 13 is a lock lever lock pawl. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. An operating handle that opens and closes circuits and disconnectors provided in the panel by rotational operation from outside the panel, an operating panel fixed to this operating handle, and an operating panel connected to the operating panel via a coupling mechanism. A sliding plate that performs reciprocating motion due to the rotational movement of the operation plate and opens and closes the opening and closing of the circuit and disconnector, and a door lock fitting having a hook portion at the tip attached to the door plate on the front of the panel; The lock lever engages with the hook of the door lock fitting when the operating handle is opened and closed, and is disengaged by rotating the rotational force of the operating plate when the door is opened, which is different from the opening and closing of the operating handle. a mounting frame that is fixed to the circuit switch or disconnector and holds the operating handle, slide plate, and lock lever; and a mounting frame that is hung between the mounting frame and the lock lever, and is engaged with the hook of the door lock fitting on the lock lever. a return spring that applies a spring force in the direction; and a lock that is fixed to the slide plate and is provided on the lock lever when the operating handle is operated to open the door and the hook of the door lock fitting engages and disengages the lock lever. An external operating mechanism for a circuit or disconnector, comprising a lock lever retaining pawl that is engaged with the lock lever and prevents the lock lever from returning to the engagement position with the door lock fitting.