JPH07114100B2 - Interlock device for insertion type circuit breaker - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement in an interlock device for an insertion type circuit breaker.

[Prior Art] FIG. 3 shows an interlock device for an insertion type circuit breaker according to the prior art. In the figure, a circuit breaker 1 is connected to a disconnecting device 2 mounted on a mounting plate 11. Between the disconnecting device 2 and the mounting plate 11, an end bent into an L-shape
Two clasps 7 with 7A are attached.

The handle 1A for opening and closing the circuit breaker 1 is adapted to rotate in the direction indicated by arrow A. A plate-shaped slide plate 5 having elongated parallel holes 5A and 5B is slidably supported by two pins 10 on the front surface 1B of the circuit breaker 1. This circuit breaker 1 has a long hole 5A in the slide plate 5.
Since 5 and 5B are mounted vertically, the slide plate 5 moves downward by its own weight. Slide plate 5 is contact part 5C
When the handle 1A is rotated in the direction of arrow A, it moves up and down in the figure. In FIG. 3, the handle 1A is moved upward and the circuit breaker 1 is closed. At this time, slide plate 5
Is being pushed upward by the handle 1A and the rib 5D of the slide plate 5 is engaged with the L-shaped end 7A of the stopper plate 7.

The circuit breaker 1 has a connector (not shown) at its base 1C, and is connected to a connector receiving portion (not shown) of the disconnecting device 2 in the state shown in FIG. When removing the circuit breaker 1 from the disconnecting device 2, the circuit breaker 1
Can be separated from the connector receiving portion of the disconnecting device 2 by moving in the direction of arrow B. However, it is dangerous to separate the circuit breaker 1 from the connector receiving portion when the circuit breaker 1 is closed because it may cause an electrical accident. Therefore, when the handle 1A is in the closed position, the rib 5D of the slide plate 5 is engaged with the end 7A so that the circuit breaker 1 cannot be moved in the direction of arrow B. . Such a device is called an interlock device.

FIG. 4 shows a state in which the handle 1A is turned downward and the circuit breaker 1 is opened. At this time, the slide plate 5 moves downward by its own weight, and the engagement between the rib 5D and the end 7A of the stopper 7 is released. As a result, the circuit breaker 1 can be moved in the direction of the arrow B and separated from the disconnecting device 2.

[Problems to be Solved by the Invention] In the configuration according to the above-mentioned conventional technique, as shown in FIG. 5, the clasp 7 is erroneously excessive in the direction of arrow C during the work of mounting or removing the circuit breaker 1. When an appropriate force is applied, the stopper 7 is deformed in the direction of the arrow C, and the end 7A of the stopper 7 has the rib 5D even when the slide plate 5 is in the position moved upward.
Does not engage. As a result, the stopper plate 7 does not lose its function as an interlock mechanism, and there is a risk that the circuit breaker 1 can be removed from the disconnecting device 2 regardless of the position of the handle 1A.

[Means for Solving the Problems] The interlock device for an insertion-type circuit breaker according to the present invention comprises:
A slide plate, which is provided on the front surface of the insertion-type circuit breaker and moves on the front surface of the insertion-type circuit breaker in conjunction with the operation of a handle for opening and closing, is measured in the moving direction of the slide plate. One end was provided with a bent portion substantially perpendicular to the slide plate and was fixed to the disconnecting device into which the insertion type circuit breaker was inserted, and the insertion type circuit breaker was closed. At this time, at the moving position of the slide plate, there is provided a stopper plate having a concave portion that engages with the slide plate inside the bent portion.

[Operation] By engaging the concave portion of the stopper plate with the bent portion of the slide plate, the stopper plate is restrained by the bent portion.

[Embodiment] FIG. 1 shows an embodiment of an interlock device for an insertion type circuit breaker according to the present invention. In the figure, a circuit breaker 1 is connected to a disconnecting device 2 fixed to a mounting plate 11 by a connector (not shown). On the front face portion 1B of the circuit breaker 1, a plate-like slide plate 15 having elongated holes 15A and 15B is supported by respective pins 10 so as to be movable along the elongated holes 15A and 15B. Circuit breaker 1 is front part 1B
It is opened and closed by rotating the handle 1A provided in the direction of arrow A, is closed when the handle is rotated upward, and is opened when it is rotated downward. When using this circuit breaker 1, the long holes 15A and 1 of the slide plate 15
5B can be mounted vertically, so slide plate 15
Moves downward by its own weight, and the handle 1A
Is in contact with. Therefore, when the handle 1A is rotated upward, the slide plate 15 moves upward, and when the handle 1A is rotated downward, it moves downward due to its own weight.
In addition, the slide plate 15 has a bent portion whose end is bent into an L shape.
15F is provided.

Two stoppers 17 are fixed to the bend of the disconnecting device 2 and the mounting plate 11, and a recess 17C is provided at the tip 17B thereof. The width of the recess 17C is larger than the thickness of the slide plate 15, and the rib 15D of the slide plate 15 is engaged with the recess 17C when the slide plate 15 moves upward.

In the state shown in FIG. 1, the handle 1A is rotating downward and the slide plate 15 is also moving downward. As a result, the rib 15D is not engaged with the recess 17C, and the circuit breaker 1 can be removed from the disconnecting device 2.

Next, when the handle 1A is rotated upward to close the circuit breaker 1, the slide plate 15 moves upward. As a result, the second
As shown in the figure, the rib 15D of the slide plate 15 is engaged with the recess 17C. When the rib 15D is engaged with the recess 17C, the circuit breaker 1 cannot be removed from the disconnecting device 2 even if it is moved in the direction of the arrow B.

According to the configuration shown in this embodiment, the tip portion 17B of the stopper 17 is used in the work of mounting or removing the circuit breaker 1.
Even when a force indicated by an arrow C is applied to the stopper plate 17, the stopper plate 17 is held by the bent portion 15F of the slide plate 15.

[Advantages of the Invention] As described above, according to the present invention, the tip portion 17B of the stopper 17 is
Is held by the bent portion 15F of the slide plate 15, no matter which direction the force is applied to the stopper 17, the engagement between the two does not disengage. Therefore, the reliable interlock function can always be maintained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which an interlock device of an insertion type circuit breaker according to an embodiment of the present invention is released, and FIG. 2 is a perspective view showing a state in which the interlock device of this embodiment is working. FIG. 3 is a perspective view showing a state in which the interlock device operates in the interlock device of the conventional insertion type circuit breaker, and FIG. 4 shows the interlock device released in the interlock device of the conventional insertion type circuit breaker. FIG. 5 is a perspective view showing a state where the stopper plate is bent, and FIG. 5 is a perspective view showing a state where the stopper plate is bent in the interlock device of the insertion type circuit breaker according to the conventional technique. In the figure, 1 is an insertion type circuit breaker, 1A is a handle, 2 is a disconnecting device, 15 is a slide plate, 15F is a bent portion, 17 is a clasp, 1
7C is a recess.

Claims (1)

[Claims] 1. A slide plate that moves on the front surface of the insertion-type circuit breaker in association with the operation of a handle provided on the front surface of the insertion-type circuit breaker for opening and closing, and in the moving direction of the slide plate. On the other hand, a bent portion provided at a side end substantially at right angles to the slide plate, a clasp fixed to a disconnecting device into which the insertion type circuit breaker is inserted, the insertion type circuit An interlock device for an insertion-type circuit breaker, comprising: a stopper having a recess that engages with the slide plate inside the bent portion at the moving position of the slide plate when the circuit breaker is closed.