JPH0624117Y2 - External operation handle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an improvement of an external operation handle for operating a circuit breaker housed in a box without opening a door.

(Prior Art) An external operation handle equipped with a handle protruding outward from the door of the box is installed above the circuit breaker installed in the box, and the arm on the back of the handle is engaged with the knob of the circuit breaker. A device that allows the circuit breaker to be operated while the door is closed is known in the related art. However, since this type of conventional external operation handle has a structure that directly operates the knob of the circuit breaker, various types of external operation handles with different effective strokes can be used depending on the model stroke of the circuit breaker knob. There was a drawback that had to be made.

(Problems to be Solved by the Invention) The present invention aims to solve the above conventional problems and to provide an external operation handle that can be commonly used for various circuit breakers having different strokes. It has been completed.

(Means for Solving the Problem) The present invention provides a handle which is rotated around a first shaft on the surface of a flat plate supported on the front surface of a circuit breaker, and separates the handle from the first shaft on the back surface of the flat plate. The external operation handle is provided with a swing arm that swings around the second axis to move the knob of the circuit breaker, and a plurality of pin insertion holes are provided in a radial direction on the back surface of the handle. While a cam is provided, a long hole is formed at the tip of the swing arm, and the pin inserted into this pin insertion hole penetrates the opening of the flat plate to engage with the long hole. To do.

(Embodiment) The present invention will be described in detail below with reference to the illustrated embodiment. In FIGS. 1 and 2, (1) is a flat plate with legs (2) attached to the front of the circuit breaker (50). Yes, this slab
The surface of (1) is provided with a handle (4) which can be rotated within a predetermined angle about the first shaft (3). Also, on the back surface of the flat plate (1), the second shaft separated by several cm from the first shaft (3)
A swing arm (6) swinging around (5) is provided. The swing arm (6) has a hole (7) that engages with the knob (51) of the circuit breaker (50), and has a long hole (9) at its tip portion (8).

On the other hand, a cam (10) that rotates together with the handle (4) is provided on the back surface of the handle (4). This cam (10) has a plurality of pin insertion holes (1
1) is transparently installed, and one of them has a pin insertion hole (1
Opening in which the pin (12) inserted in (1) is formed in the flat plate (1)
It penetrates through (13) and engages with the long hole (9) of the swing arm (6). Therefore, as shown in FIG. 3, even if the turning angle of the handle (4) and the cam (10) is a constant angle of, for example, 90 °,
When the pin (12) is inserted in the innermost pin insertion hole (11), the swing angle of the swing arm (6) is small, for example, 24 °, and the pin is inserted in the outermost pin insertion hole (11). When the (12) is inserted, the swing angle of the swing arm (6) becomes large, for example, 42 °. As a result, the amount of movement of the hole (7) of the swing arm (6) also changes, and it can be used for circuit breakers (50) of various strokes.

An interlock mechanism is incorporated in the external operation handle of the present embodiment, and its contents will be described below. The interlocking action is performed by a substantially L-shaped hook (14). That is, the hook (14) is pivotally attached to the back surface of the flat plate (1) by the third shaft (15), and is given a counterclockwise rotation moment in FIG. 17) project from the end face of the flat plate (1) and open the box door.
It is always engaged with a stopper plate (31) protruding from the back surface of (30). When the door (30) is closed as described above, the swing arm (6) is turned on by turning the handle (4) as shown in FIG. 4 (the position where the circuit breaker is turned on) and as shown in FIG. It can be moved freely to the shown off position (position to turn off the circuit breaker). Further, when the handle (4) is further rotated clockwise from the position shown in FIG.
The protruding part (18) of the cam (10) on the back surface of (4) presses the bent part (19) at the tip of the hook (14) against the spring (16),
Rotate (14) clockwise about the third shaft (15) as shown in the drawing to move the tip (17) of the hook (14) from the clasp (31) of the door (30) as shown in FIG. remove. Therefore, in this state, the door (30) can be opened, and the circuit breaker (50) is always off at this time. That is, the door (30) cannot be opened unless the circuit breaker (50) is turned off.

Next, when the door (30) is removed from the stopper plate (31), the hook (14) is moved further downward than the state shown in FIGS. 4 to 6 by the force of the spring (16) as shown in FIG. . In this state, the protrusion (21) above the hook (14) moves further to the left in the drawings than in FIGS. For this purpose tentatively
Even if the (4) is rotated in the ON direction, the base portion (20) of the swing arm (6) hits the protruding portion (21) and prevents the rotation in the ON direction. Therefore, the circuit breaker (50) cannot be turned on when the door (30) is open.

(Effect of the Invention) As described above, the present invention is used for operating the circuit breaker inside the box from the outside without opening the box door, and is inserted into the pin insertion hole. The swing angle of the swing arm can be changed by changing the position of the pin, and the same external operation handle can be used for various circuit breakers having different strokes. Therefore, according to the present invention, there is an advantage that it is not necessary to manufacture various kinds of external operation handles having different strokes as in the conventional case. Therefore, the present invention has an extremely great practical value as an external operation handle that solves the conventional problems.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a rear view (lid for explaining changes in the swing angle of a swing arm depending on a pin insertion position). Is a front view (viewed from the back side direction of the lid) for explaining the operating state, and FIG. 4 to FIG.
4 is a state in which the handle is turned to the on position, FIG. 5 is a state in which the handle is turned to the off position, FIG. 6 is a state in which the handle is turned to the door open position, and FIG. Explain the state where the door is opened. (1): Flat plate, (3): 1st axis, (4): Handle, (5): 2nd
Axis, (6): Swing arm, (9): Long hole, (10): Cam, (1
1): pin insertion hole, (12): pin, (13): opening, (50): circuit breaker, (51): knob.

Claims (1)

[Scope of utility model registration request] 1. A flat plate supported on the front surface of a circuit breaker (50).
A handle that is rotated around the first axis (3) on the surface of (1)
(4) is provided, and on the back surface of this flat plate, the circuit breaker (5) is swung about the second shaft (5) separated from the first shaft (3).
It is an external operation handle provided with a swing arm (6) for moving the knob (51) of (0), and a plurality of pin insertion holes (11) are radially provided on the back surface of the handle (4). Came cam (1
(0) is provided, a long hole (9) is formed at the tip of the swing arm (6), and the pin inserted into this pin insertion hole (11)
An external operating handle characterized in that the opening (13) of the flat plate (1) penetrates the (12) and is engaged with the elongated hole (9).