JP2980392B2 - Circuit breaker manual operation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker manual operation mechanism.

[0002]

2. Description of the Related Art For example, among operating mechanisms of a power circuit breaker, there is an electric spring operating mechanism for closing a main contact by using a return force of an operating spring pulled by a small-capacity electric motor. In this electric spring operating mechanism, a strong return spring is used to operate the movable main contact of the circuit breaker that cuts off the fault current of the power system and performs the re-closing operation at a high speed. At the time of release, a large force and impact is applied to the shaft and link that work together with the spring. In addition, the operating spring of this operating mechanism is always energized and kept on standby, regardless of whether the main contact is on or off, in order to perform the high-speed reclosing operation, which is the duty of the circuit breaker, so that it can be operated at any time. Has become.

[0003] Then, in the operating mechanism of such circuit breakers, push buttons for manual operation is attached to the front plate of the circuit breaker, when the main contacts of the circuit breaker is open, as can be turned manually A manual operation mechanism is provided. FIG.
Is located on the right side of the circuit breaker 20 provided with such a manual operation mechanism.
FIG . In the drawing, disconnecting portions 24A and 24B are vertically provided at the rear of the circuit breaker 20, a front plate 25 is provided at the front, and wheels 25b are provided at the lower and front and rear and left and right.

In the center of the front plate 25, a handle 25a is attached to the left and right as viewed from the left side (that is, the front side) of FIG. A section 26 is provided. Inside the operation mechanism section 26, a mechanism frame 21 indicated by a dotted line in the figure is mounted on the front side, and a manual operation mechanism 22 described later is mounted on the upper front end of the mechanism frame 21.

FIG. 6 is an enlarged detailed view of the manual operation mechanism 22, showing a state where the circuit breaker is in an open state. In the figure,
At the end after the support (not shown) fixed to the mechanism frame 21, shoulder pin 7 is inserted rotatably, the stepped pin 7
The intermediate part of the on / off indicator 23 is fixed to
At the front end of 23, a square hole (not shown) is formed in the mechanism frame 21 and the front plate 25. On the front of this on / off indicator 23,
An unillustrated nameplate indicating "OFF" on the upper portion 23a and "ON" on the lower portion 23b is attached.

A rotary shaft 20 of a circuit breaker closing toggle (not shown) is provided below the on / off indicator 23 in a direction perpendicular to the plane of the drawing. The rotary shaft 20 has a lever 6 bent in a <shape.
Is fixed by bolts 20a. On the other hand, the mounting plate 13 is provided on the mechanism frame 21 in a direction orthogonal to the plane of the drawing,
An inverted L-shaped stopper 12 is fixed in front of the lever 6 on the back surface of the mounting plate 13, and the front surface of the lever 6 is positioned above the stopper 12 by the return force of a spiral spring (not shown) wound around the rotating shaft 20. It is in contact with the end 12b.

[0007] Furthermore, the mounting plate 13, the axis 5a of the push button 5 is fitted Yu, this shaft 5a, the spacing tube 12a is inserted to the rear of the stopper 12, the rear end of the spacing pipe 12a is A retaining ring 12c is inserted, and a compression coil spring 14 is previously inserted between the back surface of the head 5b of the push button 5 and the front surface of the mounting plate 13.
Is inserted. Now, in the manual operation mechanism 22 configured as described above, by pushing the head 5b of the push button 5 from the front, the lower end of the lever 6 is pushed, the rotating shaft 20 is rotated to the left, and a catch (not shown) is removed. Then, the biased operation spring (not shown) is released to open the circuit breaker. At the same time, the rear end upper part 23a of the on / off indicator 23 is pushed downward by a lever (not shown) and swings right as shown by arrow A, and the front end lower part 23b of the on / off indicator 23 moves upward and is stepped. It is a substantially vertical surface located in front of the pin 7.

[0008]

However, in the manual operation mechanism of the circuit breaker constructed as described above, even when the main contact of the circuit breaker is closed, if the push button 5 is pressed by mistake, the urging is performed. The released operation spring is released. Then, the impact due to this release becomes large due to the so-called ramming, which is a return in a no-load state in which the main contact and a link mechanism for applying the main contact to the load of the operation spring are not connected. If they overlap, the connecting parts may shorten their life due to the impact.

Conventionally, a caution label is attached to the front surface of the front plate 25 at the side of the push button 5 so that the push button 5 is not pressed when the main contact is "on". Although described in the manual, this method can prevent erroneous operation to some extent, but cannot completely prevent erroneous operation of pressing the push button 5 without reading the caution label or the instruction manual. A method of strengthening a component that receives an impact by the return of the operation spring is also considered. However, since the component becomes heavier and heavier, the inertia increases, and there is a possibility that the throwing speed at the time of normal operation may decrease. SUMMARY OF THE INVENTION It is an object of the present invention to provide a circuit breaker manual operation mechanism that can prevent hitting due to erroneous operation of the circuit breaker manual operation mechanism and can prevent a reduction in the life of mechanical components.

[0010]

Means and operation for the present invention, there is provided a on-off indicator before end swings up and down input and switching operation of the circuit breaker,
In a manual operation mechanism of a circuit breaker provided with a push button for releasing a biased operation spring to operate a circuit breaker closing operation mechanism, an upper portion is connected to an on / off indicator via a link, and the on / off indicator is connected. engages the rear of the push button is lower moves downward by upward movement of the front end of the indicator, the upward movement under dynamic before end of on-off indicator
By then providing the interlock plate release the engagement by,
When the breaker is closed, the operation of the push button is disabled,
This is a manual operation mechanism of a circuit breaker, which prevents the breaker operating mechanism from hitting due to an erroneous operation of the push button and prevents the life of components of the operation mechanism from being shortened.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the manual operation mechanism of a circuit breaker according to the present invention will be described below with reference to the drawings. However, the same parts as those in FIGS. 5 and 6 are denoted by the same reference numerals, and description thereof is omitted. FIG.
In the right side view showing a manual operating mechanism of the circuit breaker of the present invention, the main contacts of the circuit breaker indicate when open, when 2 main contact is closed, and FIG. 3 is a left side magnified view of FIG. 2 Is shown.

In FIG. 1, a mounting plate 1 is fixed to a mechanism frame 21 in front of a stepped pin 7 vertically in a front-rear direction through a mounting hole 1a provided at an upper end of the mounting plate 1. . A stepped pin 15 is fixed to the center of the mounting plate 1 slightly forward with a nut 15a as shown in FIG. The intermediate portion of the triangular link 2 is rotatably provided on the right side of the stepped pin 15 when viewed from the front, and the rear end of the triangular link 2 is connected to the upper end of the oval link 9 via the pin 17. The lower end of the link 9 is connected to the center of the lower part of the on / off display 8 via the stepped pin 16 at a position slightly forward.

On the other hand, the upper end of an oval link 3 is connected to the front end of the triangular link 2 via a pin 18, and the lower end of the link 3 has an oval having a portion parallel to the longitudinal direction of the link 3. The hole 3a is formed as shown in FIG. Pin 19 to fit Yu This oval hole 3a, the pin in the pin 19
An E-shaped retaining ring, which is omitted in detail, is inserted so as to sandwich the link 3 penetrated by 19, and both ends of a spiral spring 10 having both ends substantially V-shaped are wound around the pin 19 and the stepped pin 15, so that the pin 19
Is constantly pressed downward by the return force of the spiral spring 10.

On the lower right side of the mounting plate 1, a vertically elongated strip-shaped groove 1b is formed vertically, as shown in FIG. In the upper part of the interlock plate 4, an oblong hole (not shown) that is long in the vertical direction is provided. This oval hole, leftmost Yu fitted by a pin 19 to the oblong hole 3a of the link 3 is fitted Yu the upper end in FIG. 1. On the right side of the interlock plate 4, a holding plate 11 having an inverted L-shape in FIG. 1 is provided, and the holding plate 11 is fixed to the mounting plate 1 with three small screws 6a.

[0015] In the manual operating mechanism thus constructed breaker, in Figure 1 the circuit breaker is shown an open state, pressing the push button 5, a conventional manually operated mechanism shows in FIG. 6
Similarly to 22 , the lever 6 is pushed as shown in FIG. 4, the rotating shaft 20 rotates to the left, the closing latch (not shown) is disengaged from the cam plate (not shown), and the breaker is closed by the return of the operating spring (not shown). You.

Then, the shaft 7 swings clockwise by a link (not shown), and the on / off indicator 8 also swings as shown in FIG. 2, so that the link 9 connected to the right end of the triangular link 2 As a result, the triangular link 2 is swung counterclockwise by the pin 17 as shown in FIG. This swing causes the front end of the triangular link 2 to descend, so that the link 3 is pushed downward by the pin 18 and
The fitted pin 19 is also pushed downward by the spring 10 and descends as shown in FIG. Then, this pin 19 has an upper oval hole
The fitted interlock plate 4 is lowered by the spring 10 and the pin 19, and the lower end thereof is the head 5 of the push button 5 as shown in FIG.
fitted Yu between the front of b of the rear surface and the mounting plate 13. Therefore, in this state, even if the push button 5 is inadvertently pressed, the head 5a does not retreat due to the interlock plate 4 at the rear thereof, and the closing mechanism does not operate. Can be prevented.

[0017]

Effect of the Invention] above, the present invention provides a on-off indicator that oscillates <br/> before end up and down in the input and switching operation of the breaker, breaker by Hozei the biased operated spring in the manual operating mechanism of the circuit breaker the push button is provided for operating the closing operation mechanism, the upper
Part engages the rear of the push button is lower and downward is connected to the on-off indicator in upward movement of the front end of the on-off indicator via the link, downward movement of the front end of the on-off indicator in upward to by providing the release to <br/> Ru interlock plate engagement, since the circuit breaker is impossible the operation of the push button in the closed state, color of the circuit breaker operating mechanism according to erroneous operation push button It is possible to obtain a manual operation mechanism of the circuit breaker that can prevent hitting and prevent the life of components of the operation mechanism from being shortened.

[Brief description of the drawings]

FIG. 1 is a right side view showing an embodiment of a manual operation mechanism of a circuit breaker of the present invention.

FIG. 2 is a right side view showing the operation of the manual operation mechanism of the circuit breaker of the present invention.

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a right side view showing an operation different from FIG. 2 of the manual operation mechanism of the circuit breaker of the present invention.

FIG. 5 is a right side view of a circuit breaker to which a conventional manual operation mechanism of the circuit breaker is attached.

FIG. 6 is a right side view showing a conventional manual operation mechanism of the circuit breaker.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mounting plate, 2 ... Triangle link, 3, 9 ... Link, 4 ... Interlock plate, 5 ..., Push button, 6 ... Lever, 7 ...
Stepped pin, 8 ... ON / OFF indicator.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-22033 (JP, A) JP-A-63-157138 (JP, U) JP-A-2-25142 (JP, U) JP-A-2,142 106637 (JP, U) Japanese Utility Model Showa 62-65732 (JP, U) Japanese Utility Model Showa 64-230 (JP, U) Japanese Utility Model Showa 63-43770 (JP, Y2) (58) Field surveyed (Int. ⁶ , DB name) H01H 33/46

Claims (1)

(57) [Claims] 1. A pushbutton previous edge in the input and switching operation of the breaker operating and on-off indicator that swings up and down, the closing operation mechanism of the circuit breaker by Hozei the biased operated spring in the manual operating mechanism of the circuit breaker which is provided, the lower is the push top moves downward by upward movement of the front end <br/> the on-off indicator connected to the entering switching display via link It engages the rear of the button, a manual circuit breaker, characterized in that a front interlocking plate fill moves upward under dynamic before end of the switching display you <br/> releases the engagement Operation mechanism.