JP2000341811A - Drawer type circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To alarm by sound when a main breaker reaches a given position in a drawer type circuit breaker. SOLUTION: A pot-shaped spring 32 is mounted on a trapezoid recessed part 29 of a rail at a given position. When a roller 25 moved together with a main breaker reaches the recessed part 29 of the rail 19, the roller 25 becomes free from a bent part of the spring 24 and dislocated at high speed by the spring 24 to collide with a bottom 29c and generate a sound. When the roller 25 is moved from the recessed part 29 to a projected part 30, the spring 32 is bent and the roller 25 is slid along a slanted face 29b of the recessed part 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for notifying that a breaker body of a draw-out type circuit breaker has reached a predetermined position.

[0002]

2. Description of the Related Art A circuit breaker body of a draw-out type circuit breaker has a predetermined position in a drawer frame, that is, a connection position where a main circuit contact and a control circuit contact of the drawer frame and the breaker body are in contact with each other. It can move linearly between the test position where only the circuit contacts make contact and the disconnect position where both contacts disconnect. The operator needs to be able to recognize that the breaker body has reached each position during the moving operation.
As disclosed in Japanese Unexamined Patent Publication No. 169416, a lock mechanism is automatically operated when a predetermined position is reached, and any further movement cannot be performed unless the lock is released.

In the prior art, when moving from the connection position to the disconnection position or in the reverse direction, the lock mechanism must be operated once at the test position during movement to release the lock and perform the further movement operation. However, there is a problem that the operation of releasing the lock mechanism is troublesome, and there is a problem that the operation mechanism is broken by the operator continuing the operation brute force without releasing the lock by mistake.

[0004] In order to solve the above-mentioned problems of the prior art, there has been proposed a position display mechanism capable of visually ascertaining that the breaker body has reached a predetermined position without using a lock mechanism. Japanese Patent Application No. 10 by applicant
143216.

FIG. 5 shows a state in which the breaker main body 1 of the draw-out type circuit breaker to which the display mechanism is mounted is located at a connection position in the drawer frame 2. The main circuit terminal 3 and the body side control circuit terminal 4 are in contact with the frame side main circuit terminal 5 and the frame side control circuit terminal 6 provided on the drawer frame 2, respectively. Operation handle 1 in this state
8 operates the drawer operating mechanism 7 to operate the breaker body 1
Moves to the left, and reaches the test position where the main circuit terminals are separated and only the control circuit terminals are in contact. When further operated, the control circuit terminal also reaches the disconnection position where it is opened. In addition,
The draw-out operation mechanism 7 is provided on the draw-out frame 2 by operating the operation handle 18 and moves the breaker main body by changing the engagement amount between the screw 8 and the male screw 9 provided on the breaker main body 1. However, since it is not the main part of the present invention, its detailed description is omitted.

FIG. 6 is a diagram showing the position display mechanism 10 when the circuit breaker main body 1 is at the disconnection position, and the configuration and operation will be briefly described with reference to FIG. An operation plate 12 urged downward by a spring (not shown) is provided on a substrate 11 of the position indicating mechanism 10 attached to the bottom of the circuit breaker body 1. The movement plate 12 is prevented from being displaced by a stopper 13 provided on the draw-out frame 2 so that the operation plate 12 is not displaced even when the circuit breaker main body 1 moves between the connection position and the disconnection position.

A pointer 14 for indicating a position is provided so as to be displaced right and left by rotation of a lever 15, and the lever 15 is rotated by driving a pin 16 provided on the lever 15. The pins 16 are fitted in guide grooves 12b formed in the operation plate 12, and when the substrate 11 moves downward in the connection position direction, the pins 16 are moved to the lower left along the guide grooves 12b of the operation plate 12 in a stationary state. By moving in the direction, the lever 15 rotates clockwise and the hand 14 is displaced rightward, so that it can be recognized that the circuit breaker main body has reached the test position or the connection position. The reverse operation is performed when moving from the connection position to the disconnection position.

In FIGS. 6 and 7, utilizing a part of the display mechanism, a rail 51 provided on the operation plate 12 and having a concave portion, and a lever 53 provided on the substrate 11 are provided. , A roller 52 provided on one arm of a lever 53 and an interlock link 1 connected to the other arm.
The circuit breaker is provided with an interlock mechanism 50 for preventing the closing operation of the circuit breaker body 1 when the circuit breaker main body 1 is not at a predetermined position. That is, the rollers 52 which are urged to move along the rails 51 are located in the recesses 51a, 51b and 51c of the rail 51 when the circuit breaker body 1 is in the connection, test and disconnection positions, respectively. When the roller 52 is located on the convex portion of the rail 51, the interlock link 17 cannot close the circuit breaker main body 1 when the roller 52 is located on the convex portion of the rail 51. It is connected to a trip member not shown.

[0009]

In the display mechanism described above, the pointer 14 is not displaced proportionally with respect to the amount of movement of the circuit breaker main body. The device is devised so as to be greatly displaced even if moved slightly, so that the operator can surely know that the predetermined position has been reached.

[0010] On the other hand, some customers desire not only to visually check the moving operation of the breaker body but also to confirm that the breaker has reached a predetermined position by some other method just in case.

[0011] Therefore, the present invention responds to the above-mentioned customer's demands, and provides a sound when the circuit breaker body reaches a predetermined position while moving with a simple structure, so that a more reliable moving operation can be performed. An object of the present invention is to realize a drawer-type circuit breaker that can be used.

[0012]

In order to solve the above problems, the present invention relates to a drawer type circuit breaker comprising a drawer frame and a breaker body moving in the drawer frame. A roller that moves on the rail following the movement of the rail, biasing means for pressing the roller against the rail surface, and a concave portion formed in a predetermined portion on the moving surface of the roller of the rail, the opening end of which A concave portion having a slope in a direction in which a roller connecting the bottom portion moves, and a free end having a roller moving surface continuous with the rail surface at a position protruding from an opening end of the concave portion in a free state, and an inclined surface of the concave portion. An operating member that is inclined and has an inclined surface that intersects the inclined surface of the concave portion, biasing means for urging the operating member in a direction in which a free end of the operating member projects from an opening end of the concave portion, and a roller including the concave portion Displaced toward the bottom of It is set to be provided with a collision member that emits sound by colliding with can the roller.

With such a configuration, when the roller moves from the rail to the free end of the operating member just before the roller reaches the position corresponding to the predetermined position on the outward path of the moving operation, and reaches the predetermined position. The roller leaves the free end. The detached roller does not move along the inclined surface because the free end of the operating member is located at a position protruding from the inclined surface of the concave portion of the rail surface, and the inclined surface of the operating member is opposite to the moving direction of the roller. Since it is inclined in the direction, it does not move along this inclined surface. That is, the roller is in a free state, and suddenly moves toward the bottom of the concave portion by the urging force and collides with the collision member to emit a sound.

On the other hand, on the return path of the moving operation for returning the roller from the position at the bottom of the recess to the original position, the roller moves along the bottom and the inclined surface of the recess and returns to the rail. At this time, the roller moves while displacing the operating member against its urging force, and when the roller moves from its free end to the rail, the operating member automatically returns to the original state. There is no need to provide a reset or perform a reset operation.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to an embodiment shown in FIGS. Note that the schematic overall configuration of the drawer-type circuit breaker of this embodiment is the same as that described in “Prior Art” including a position display mechanism by visual observation, so that the description is omitted, and different parts are described below. explain. In addition, components that are substantially the same as those described in “Prior Art” are given the same reference numerals and described.

1 and 2, the operating plate 12 is provided with a rail 19 having a concave portion, and a support plate 20 attached to the substrate 11 holds a lever 21 and a lever 22 by a shaft 23. . The lever 21 is rotationally urged clockwise by a coil spring 24 having a relatively large urging force, and a roller 25 attached to one arm can move on the rail 19. Lever 22
An interlock link 17 is connected to one of its arms, and the arm is rotationally urged clockwise by a torsion spring 26 having a relatively small urging force and pressed against the lever 21.

The roller 25 fits into the recesses 27, 29 and 31 formed in the rail 19 when the circuit breaker main body 1 is in the connection, test and disconnection positions, respectively. Are arranged on the projections 28 and 30 which are relatively projections.

The recess 2 corresponding to the test position of the circuit breaker body 1
Reference numeral 9 denotes a trapezoid having an upper base longer than the lower base, and a wire spring 32 formed by bending into a pot with a narrow opening and a wide bottom along the rail 19 is attached to the concave portion 29.
The bottom portion 32a of the spring 32 is held by a holding plate 34 and a spacer 35 bent in an L-shape and variously fastened to the rail 19 by screws 33 so that the spring 32 can flex freely. Further, the spring 32 has an inclined portion 32 b and an inclined portion 32 c formed by the inclined surface 29 a of the concave portion 29.
32d and both free ends 32d
And 32e act on the spacer 35 so as to protrude from the opening of the recess 29 of the rail. Further, the free end 32d and the free end 32e of the spring are formed to be bent outward so as to form a rail substantially connected to the projection 28 and the projection 30 of the rail, respectively.

The operation of moving the breaker body 1 of the draw-out type circuit breaker according to the embodiment configured as described above from the connection position to the test position will be described below. When the substrate 11 moves in the test position direction together with the breaker body 1 at the connection position, the roller 25 moves along the slope of the concave portion 27 while rotating the lever 21 counterclockwise from the bottom of the concave portion 27 of the rail 19 to project. It reaches the unit 28. Further, when the roller 25 moves, the roller 25 moves from the convex portion 28 to the free end 32d of the spring,
As shown in FIG. 3, the free end 32d is separated from the bent portion.
The lever 25 detached from the bent portion rotates around the shaft 23 clockwise in a free state. That is, the roller 25 displaced at this time does not follow the inclined portion 32b of the spring during rotation because the spring 32 has a pot shape with a narrower opening, and the bending point of the free end 32d is The inclined surface 29 of the concave portion because it is located at a portion protruding from the opening.
There is no displacement along a. Thus, the roller 25
Is in a free state, and as shown in FIG. 1, it rotates clockwise at high speed by the action of the spring 24 and collides with the bottom surface 29 c of the concave portion to generate an impact sound. I understand.

When the circuit breaker body 1 is further moved from the test position to the disconnection position, the roller 25 moves while rotating the lever 21 counterclockwise from the bottom surface 29c of the concave portion 29 along the inclined surface 29b. During this movement, the roller 25 engages with the inclined portion 32c or the free end 32e of the spring 32, and deflects the spring 32 so that the free end 32e is displaced rightward as shown in FIG. Reach. When the roller 25 is further moved, the roller 25 reaches the concave portion 31 corresponding to the disconnection position from the convex portion 30.

Conversely, when the circuit breaker main body 1 is moved from the disconnection position to the connection position, the roller 25 moves from the concave portion 31 to the convex portion 30, and from the convex portion 30 to the free end 32 e of the spring 32. And the roller 25 is released from the bent portion to be in a free state, and the roller 25 collides with the bottom surface 29c to generate an impact sound. Further, when the breaker body 1 is moved, the roller 25 deflects the spring 32 so that the free end 32d is displaced to the left, moves along the inclined surface 29a, and moves from the convex portion 28 to the concave portion 2.
Reach seven. During such an operation, since the lever 22 rotates together with the lever 21, the interlock function is not impaired.

In the above embodiment, the spring 32 is made of a wire-like material. However, if the spring 32 has a free end and an inclined portion having the same function as described above, it is attached by a torsion spring or a coil spring. It may be a pair of levers that are urged. Further, it may be provided not only at the test position but also at the connection position or disconnection position. Further, the roller 25 is also mounted on the rail 19.
Although a simple structure is used to generate easily audible sound using metal, a means for generating a special sound may be further provided to collide the rollers.

The embodiment of the present invention has been described above. However, the embodiment of the present invention disclosed above has the following features.
This is merely an example, and the scope of the present invention is not limited to the above embodiment of the present invention. The scope of the present invention is defined by the appended claims, and is intended to include all modifications within the scope and meaning equivalent to the appended claims.

[0024]

The present invention is embodied in the above-described embodiment, in which a roller that moves following the movement of the circuit breaker main body extends from a bent portion of a spring that is provided to protrude into a concave portion formed at a predetermined position on the rail. Since it is in a free state and moves at a high speed and emits a sound, the operator can easily recognize the operation state, so that there is an effect that it is safer.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of an embodiment of a drawer type circuit breaker according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view illustrating the operation of the present embodiment.

FIG. 4 is a side view illustrating the operation of the present embodiment.

FIG. 5 is an overall side view of a conventional draw-out type circuit breaker.

FIG. 6 is a plan view showing the position display mechanism of FIG.

FIG. 7 is a side view showing an interlock mechanism operating member included in the position display device of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Breaker main body 2 Draw-out frame 10 Position display mechanism 11 Substrate 12 Operation plate 17 Interlock link 19 Rail 21, 22 Lever 24, 26, 32 Spring 25 Roller 27, 29, 31 Concave part 28, 30 Convex part 34 Holding plate 35 Spacer

Claims (1)

[Claims] 1. A drawer-type circuit breaker comprising a drawer frame and a circuit breaker body moving in the drawer frame, a rail, and a roller moving on the rail following movement of the circuit breaker body. Urging means for pressing the roller against the rail surface, and a concave portion formed in a predetermined portion on the moving surface of the roller on the rail, the direction in which the roller moves connecting an opening end and a bottom portion thereof A concave portion having an inclined surface, and in a free state, a free end having a moving surface of the roller continuous with the rail surface at a position protruding from an opening end of the concave portion, and an inclined surface opposite to the inclined surface of the concave portion, An operating member having an inclined surface that intersects the inclined surface of the recess;
Urging means for urging the operating member in a direction in which the free end of the operating member projects from the opening end of the recess, and colliding with the roller when the roller is displaced toward the bottom of the recess to generate sound. A drawer-type circuit breaker, comprising: a collision member that emits.