JPH0139281B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a shutter locking device for an extraction type circuit breaker.

[Prior Art] A conventional shutter locking device uses two members, one of which is attached to the shutter device and the other to the extraction fixing frame. By locking these two members, the shutter device can be locked. The structure is such that the lock (closed position - exposure prevention state) and the breaker body are blocked at the initial stage of insertion.

By the way, since the conventional shutter locking device as described above uses two members, two members are always required for locking. Furthermore, when a shutter locking device is to be assembled into an already assembled fixed frame, it is necessary to attach members to the side plates of the fixed frame.

[Summary of the invention]

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional ones, and has a structure in which a lock plate is attached to the shutter device and a cut-out hole is made in the side plate of the fixed frame, so that the shutter device can be attached to the side plate of the fixed frame. The object of the present invention is to provide a shutter locking device that is inexpensive and easy to assemble by eliminating members.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1 to 10, 1 is the circuit breaker body, 5 is a fixed frame, 5a is a cutout hole in the fixed frame 5, 6 is a lock, 11 is an angle fixed to the fixed frame 5, and 12 is a fixed frame. A fixed terminal, 13 is an insulating member for fixing the fixed terminal 12, 14 is a lock plate, and a wave washer 15 and a pin 16 are attached to the interlocking plate 27 described below.
It is installed by. 21 is a fixing plate attached to the side plate of the fixing frame 5, 22 is a roller attached to the fixing plate 21, 23 is a pin for rotatably fixing the roller 22, and 24 is a sliding plate, and the roller 22 is connected to the elongated hole. Pin 2 is sandwiched between portions 24a and 24a.
The collar 23a of No. 3 prevents the bag from slipping out in the lateral direction. 25 is a horizontal compression spring, 26 is a spring 25
The spring 25 is fixed between the fixed plate 21 and the slide plate 24. 27
28 is an interlocking plate, 28 is a pin that rotatably fixes the interlocking plate 27 and the slide plate 24, 29 is a retaining link, 30 is a pin that rotatably fixes the retaining link 29 and the slide plate 24, 31 32 is a surface shutter, 33 is a movable shutter, 34 is a spring receiving plate, 35 is a spring pin,
Reference numeral 36 denotes a spring that presses down the shutter.The convex part of the interlocking plate 27 is inserted into the hole of the movable shutter 33, the spring 36 is inserted between the spring receiving plates 34, and the interlocking plate 27 and the movable shutter 33 are stopped by the spring pin 35. ing. The surface shutter 32 is sandwiched between the Z-shaped bent portion of the interlocking plate 27 and the movable shutter 33.

() First, the shutter operation in this embodiment will be explained. Since both the power supply side and the load side use the same mechanism, the load side will be explained. Normally, the sliding plate 2 receives the force of a compression spring 25 installed between the fixed plate 21 and the sliding plate 24.
4 is fixed between a roller 22 attached to a fixed plate 21 and an elongated hole 24a of a slide plate 24. At this time, the surface shutter 32 and the movable shutter 33 are connected to the spring 3 attached to the interlocking plate 27.
6 is subjected to compressive force, and the interlocking plate 27
Since the slide plate 24 is rotatably fixed by a pin 28, it protrudes forward from the fixed terminal 12. Since the movable shutter 33 is subjected to vertical force by the spring 31, the cutout hole of the front shutter 32 is covered by the movable shutter 33, and the fixed terminal 12 is not exposed from the surface of the drawer frame.

When inserting the main body When the main body 1 is moved to the right in FIG. This rotational force disengages the horizontal stopper portion 27c of the interlocking plate 27 from the roller 22, allowing the interlocking plate 27 to move in the horizontal direction. at this point
The main body 1 is pushing the entire surface of the L-bent portion 27a of the interlocking plate 27, and the movable shutter 33 is rotated by the rotation of the interlocking plate 27, and is in a state where it can pass through the cutout hole of the front shutter 32 (shutter open state). (See Figure 6). As the main body 1 is further inserted, it is moved in the horizontal direction by the linear portion 27b of the interlocking plate 27 and the roller 22. Since this roller 22 also fits into the elongated hole 24a of the slide plate 24, the slide plate 24 also moves in the horizontal direction along with the movement of the interlocking plate 27. When the interlocking plate 27 moves in the horizontal direction, the surface shutter 32 and the movable shutter 33 also move in accordance with the movement of the interlocking plate, exposing the fixed terminal 12. At the same time, main body 1
is inserted, so that the fixed terminal 12 and the terminal of the main body 1 can be connected (see FIG. 7).

When pulling out the main unit When pulling out the main unit, the operation is the opposite of when inserting the main unit. Briefly explaining the movement, as the interlocking plate 27 moves horizontally, the surface shutter 32 and movable shutter 33 move horizontally. Elongated hole 24a of slide plate 24
When the roller 22 moves horizontally to the position where it hits, the interlocking plate 27 rotates up and down about the pin 28 from that point. Due to this rotational movement, the movable shutter 33 covers the cutout hole of the surface shutter 32, so that the fixed terminal 12 is not exposed from the surface.

Shutter operation on only one side Shutter operation on only one side occurs during maintenance and inspection. In this case, the main body 1 is removed from the drawer frame. For example, when it is desired to inspect the fixed terminal 12 on the load side, it is necessary to hold the shutter mechanism on the load side in an open state. At this time, as shown in FIG. 8, by rotating the holding link 29, the interlocking plate 27 is rotated, and the dead center of the spring 31 is changed by rotating the holding link 29. The retaining link 29 stops at the point where it hits the roller 22, and the tension of the spring 31 causes the shutter 3 to
3 moved down (shutter open)
It is possible to hold the In addition, if the main body 1 is inserted with the shutter open, the retaining link 29 will be rotated by the roller 22, changing the dead center of the spring 31, and the retaining link 29 will be rotated by the roller 22.
Make yourself oblivious. This indicates that the shutter can be held open and is automatically released when the main body 1 is inserted.

() Next, the locking operation in the above embodiment will be explained. The lock plate 14 is the interlocking plate 2
7 and is subjected to frictional force by a wave washer 15. Normally, the lock plate 14 is housed in the interlocking plate 27 and is held in place by the frictional force of the wave washer 15, so that it does not interfere with the operation of the shutter device.

When it is desired to operate the lock plate 14, the lock plate 14 is rotated and pulled out from the interlocking plate 27 in the direction of arrow A, as shown in FIGS. let Then, the hole 27d made in the interlocking plate 27 and the hole 1 made in the lock plate 14
4d match, and the lock 6 can be placed there. Even if an attempt is made to insert the main body 1 in the direction of arrow B in this state, the side plate (dotted chain line in the figure) of the main body 1 hits the oblique edge 14a of the lock plate 14, and the main body 1 cannot be inserted any further.
In addition, the structure is such that the force acting when inserting the main body in this state is dispersed to the side plates of the fixed frame 5, so that no large impact force is applied to the pin 16.

In addition, in the above embodiment, a cutout hole 5 is provided in the side plate of the fixed frame 5.
Although the fixing frame side plate 14 is shown as having a convex shape and the lock plate 14 is concave, they may be engaged with each other.
Further, the oblique edge 14a of the lock plate 14 may be curved.

Further, in the above embodiments, the case of a disconnector or a disconnector has been described, but a disconnector or other switching device may be used, and the same effects as in the above embodiments can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, since the locking device is built into the shutter device, it is easy to modify and assemble, and a total of four locks can be attached.

[Brief explanation of drawings]

FIG. 1 is a sectional side view showing a shutter locking device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a shutter mechanism showing an embodiment of the invention, and FIG.
The figure is an exploded perspective view of the surface shutter and the movable shutter, Figure 4 is an exploded perspective view for installing the lock plate, Figures 5 to 8 are cross-sectional side views showing the operation of the shutter mechanism when the lock plate is stored. 9 and 10 are a sectional side view and a perspective view showing the state in which the lock plate is operated and locked. In the figure, 1 is the circuit cutter body, 5 is the fixed frame, 5a is the cutout hole, 6 is the lock, 11 is the angle, 1
2 is a fixed terminal, 13 is an insulating member, 14 is a lock plate, 15 is a wave washer, 16 is a pin, 21 is a fixed plate, 24 is a slide plate, 27 is an interlocking plate, 29 is a retaining link, 32 is a surface shutter, 33 is a movable shutter. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1 Two shutters are installed between the movable contacts on the power supply side and the load side provided on the circuit breaker body and the fixed contacts on the power supply side and load side provided opposite to these, respectively. , one of these two shutters is a common plate having cut-out holes corresponding to the power supply side contact and the load side contact, respectively,
The other one is separated corresponding to the power supply side contact and the load side contact, and each of these separated shutters moves on the fixed frame according to the insertion and extraction operation of the circuit and disconnector body. In a shutter device that is operated by a movable slide plate and an interlocking plate rotatably attached to the slide plate and which opens and closes the cutout hole by moving the separated shutter in a predetermined direction, the cutout hole is provided in the fixed frame. a lock plate having one end rotatably attached to the connecting plate, a projection on the other end of the lock plate being engaged with the cutout hole, and a lock locking the lock plate and the connecting plate. 1. A shutter locking device for an extraction type circuit breaker, characterized in that the circuit breaker main body is pushed by the lock plate and its insertion is prevented by fixing the shutter.