JPS6237375Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a drawer-type circuit breaker and, in particular, to a drawer-type circuit breaker and breaker with an improved fixing mechanism between the circuit breaker and a fixed frame.

Generally, the main drawer parts of a drawer-type circuit breaker include a circuit breaker or breaker, a side plate that covers both sides of the circuit breaker or breaker, a roller provided on the side plate, and a roller installed on the side plate. It is composed of a fixed frame having a movable first rail, and a second rail provided to extend the first rail.

In conventional circuit breakers and disconnectors configured in this way, the circuit breakers and breakers are always housed within the fixed frame, but can be pulled out of the fixed frame for maintenance and inspection as necessary. Sometimes. In this case, first, the connection between the connection conductor of the circuit or disconnector and the external connection conductor attached to the fixed frame opposite to this connection conductor is separated by mechanical operation. In this state, the drawer handle of the circuit breaker and disconnector attached to the side plate is exposed from the side wall of the fixed frame. After that, grasp the drawer handle and manually pull out the circuit breaker. Next, to store the circuit disconnector in the fixed frame, perform the above operation in reverse. Grasp the drawer handle and manually store the circuit disconnector in the fixed position in the fixed frame. Thereafter, the connecting conductor and the external connecting conductor are connected by mechanical operation. The circuit breakers and disconnectors housed in the fixed frame are in a position to operate the circuit opening/closing mechanism.
When an overcurrent exceeding a specified level flows through a circuit or disconnector, the circuit is immediately disconnected. However, the vibration when the circuit breaks is very large because the drawer-type circuit breakers have a large capacity, and therefore the circuit breakers and breakers move within the fixed frame due to the vibrations. In order to prevent this movement, conventionally a block was attached to the side plate, a female thread was drilled in the block, and a male screw passing through the fixing frame was used to fix the circuit or disconnector to the fixing frame.

However, the conventional configuration as described above requires components such as blocks and has drawbacks such as requiring work to attach the blocks.

The purpose of this invention is to eliminate the drawbacks of the above-mentioned conventional methods.

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 5. Fig. 1 is a perspective view showing an embodiment of the circuit and breaker according to this invention housed in a fixed frame, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a side view of Fig. 1.
FIG. 2 is an enlarged view of the main parts of FIG. In FIGS. 1 to 3, a circuit breaker 1 disconnects a circuit in response to an overcurrent exceeding a rated value. The protruding portion 2 is protruded from the front surface of the circuit breaker 1.
The operating handle 3 is provided to protrude from the protrusion 2 to the outside and is linked to the input mechanism. The front cover 4 has a through hole (not shown) inserted through the protrusion 2 to cover the main body surface of the circuit breaker 1. The dust plate 5 has a through hole (not shown) inserted into the protrusion 2 . The leaf spring 6 is installed between the front cover 4 and the dust plate 5.
It supports elastically. The top plate 7 is attached to the surface of the protrusion 2. The side plates 8 are attached to both sides of the circuit breaker 1. The roller 9 has a spool-shaped collar and a recess, and the side plate 8
It is rotatably supported on a shaft 10 attached to. The fixing frame 11 surrounds the circuit and disconnector 1 in a U-shape, and forms a first rail 11A on the side wall facing the side plate 8 that slides and engages with the recess of the roller 9, and is fixed in a U-shape. The support portion 11B is formed by bending the open end of the frame 11 into an L shape. Second
The rail 12 is provided in contact with the outer surface of the outer wall of the fixed frame 11, and its upper end surface is slidably engaged with the recessed portion of the roller 9. The long hole 13 is connected to the second rail 12
It is installed to penetrate in the axial direction.
The recess 14 shown in FIG. 5 is formed on the lower end surface of the second rail 12. As shown in FIG. The first pin 15 is installed in the fixed frame 11 and inserted into the long hole 1 of the second rail 12.
3, and always supports the second rail 12 together with the support portion 11B of the fixed frame 11. The stopper 16 has a mountain-shaped protrusion 16A formed on the upper end surface of an L-shaped material, and an L-shaped bent part 16 on the lower end.
B, is rotatably supported by the first pin 15, and when the circuit breaker 1 is housed in the fixed frame 11, the protrusion 16A is connected to the first and second rails 1.
The bent portion 16B protrudes from the upper end surfaces of the rails 1A and 12 and is locked in the recess 14 of the second rail 12.
One end of the helical spring 17 is fixed to a second pin 18 set on the fixed frame 11, and the other end is fixed to a third pin 19 set on the stopper 16. It is biased clockwise around pin 15 of. The guide pin 20 guides the second rail 12 when the second rail 12 is housed in the fixed frame 11. The drawer handle 21 is attached to the side plate 8 of the circuit disconnector 1 by a male screw 22, as shown in detail in FIG.
2, an attachment part 213 attached to the side plate 8 of the circuit breaker 1 by the male screw 22, and an attachment part 2
13 and the bent portion 21 formed between the grip portion 212
4 and a bent part 215 in which the tip of the grip part 212 is bent and brought into contact with the side plate 8 of the circuit cutter 1.
It is constructed so that it almost slides into contact with the inner surface of the side plate of the fixed frame 11 when it is stored. The male screw 23 passes through the side plate of the fixed frame 11 and is screwed into the female screw 211 of the drawer handle 21.

Next, the operation of the draw-out type circuit breaker and disconnector constructed as described above will be explained. 1 to 3 show a state in which the circuit breaker 1 is housed in the fixed frame 11 and the second rail 12 is housed on the outer surface of the side wall of the fixed frame 11. In FIGS. That is, the connection conductor 24 at the rear of the circuit breaker 1 shown in FIG. 5 is connected to the external connection conductor 25 shown in FIG. 2 provided on the fixed frame 11 opposite to this connection conductor 24. It indicates the condition. Note that the roller 9 is the first rail 1
1A, the second rail 12 is configured not to be slidably engaged with the rollers 9. In this situation, first, remove the male screw 23.
, disconnect the connecting conductor 24 and external connecting conductor 25 by mechanical operation, squeeze the drawer handle 21 and pull out the circuit disconnector 1 manually. The supported roller 9 slides on the first rail 11A and the projection 1 of the stopper 16
Touches 6A. When the drawer continues, the stopper 16 pressed by the roller 9 is moved by the helical spring 1.
7 and rotated counterclockwise around the first pin 15. Therefore, the bent portion 16B, which is locked in the recess 14 of the second rail 12, is separated from the second rail 12. This state is the fourth
As shown in the figure. In this state, the rollers 9 are configured to be slidably engaged with the first rail 11A, but not slidably engaged with the second rail 12.
When the first rail 11A and the stopper 16 are disengaged in this manner, the second rail 12 can be freely pulled out to the left in FIG. 4. The elongated hole 13 is pulled out to this length until the right end in FIG. 4 abuts the first pin 15. Next, the circuit breaker 1 is pulled out, but when the circuit breaker 1 is pulled out onto the second rail 12, the circuit breaker 1 and the second rail 12 are pulled out.
As shown in FIG. 5, this is supported by a first pin 15 inserted through the support portion 11B of the fixed frame 11 and the elongated hole 13.

Next, in order to store the circuit breaker 1 in the fixed frame 11, the above operation can be reversed. First, grasp the drawer handle 21 and manually remove the circuit breaker 1 as shown in FIG. Push it to the right to remove the circuit breaker 1 from the second position.
It is housed in a fixed frame 11 as shown in the figure. In this case, since the outer surface of the drawer handle 21 is configured to almost slide into contact with the inner surface of the side plate of the fixed frame 11, the circuit breaker 1 does not swing from side to side in FIG. is housed within the fixed frame 11. When the circuit breaker 1 is housed in a predetermined position within the fixed frame 11 in this manner, the connection conductor 24 and the external connection conductor 25 are connected by mechanical operation.
Subsequently, the male screw 23 is inserted through the side plate of the fixed frame 11 and screwed into the female screw 211 of the drawer handle 21 to fix the circuit breaker 1 and the fixed frame 11.

As described above, according to this invention, the outer surface of the drawer handle is configured so as to be in almost sliding contact with the inner surface of the fixed frame. The disconnector can be stored smoothly without shaking sideways. In addition, the drawer handle is provided with a female thread, and a male screw inserted through the side plate of the fixing frame is screwed into this female thread, so the circuit or disconnector can be fixed with fewer components and with simple operations. It has various effects such as being able to

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the circuit breaker and breaker according to this invention housed in a fixed frame;
The figure is a side view of FIG. 1, FIG. 3 is an enlarged view of the main parts of FIGS. 1 and 2, and FIGS. 4 and 5 are explanatory diagrams of the operation of this invention. In the figures, the same parts in each figure are given the same reference numerals, 1 is the circuit board and disconnector, 8 is the side plate, 9 is the roller, 11 is the fixed frame, 11A is the first rail, 11
B is a support part, 12 is a second rail, 13 is a long hole,
15 is the first pin, 21 is the drawer handle, 211
23 is a female thread, and 23 is a male thread.

Claims (1)

[Claims for Utility Model Registration] (1) A circuit board or disconnector with rollers on both sides, which is formed in a U-shape and is housed in such a way that the circuit board or disconnector is pulled out to the front side. A fixed frame having a first rail slidingly engaged with the roller on each of the two parallel sides and a support portion provided near the open end of each of the two parallel sides, the U-shaped fixed frame of the fixed frame pins planted on two parallel sides, and a second rail that is slidably supported by the pins and the support portion and housed in the fixed frame so that it can be pulled out in a direction that extends the first rail; , and a drawer type, comprising a drawer handle attached to the side plate of the circuit board and disconnector, the outer surface of the drawer handle being in almost sliding contact with the inner surface of the two U-shaped parallel sides of the fixed frame. Circuit break. (2) The drawer handle is provided with a screw hole that is screwed into the screwing material that is inserted through the two U-shaped parallel sides of the fixed frame. Drawer type circuit breaker.