JP2000340090A - Electric operation device for circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive electric operation device having a simple structure by integrating a driving device for charging a compression spring and a driving device for releasing the engagement of a latch into a single driving device. SOLUTION: When an OFF signal is inputted to an operation circuit 55, a driving device 13 for turning off a circuit breaker 50 is started, an operation arm 17 is rotated in a predetermined direction (OFF direction) to operate a handle 53 of the circuit breaker 50 to its OFF side while energizing an energy- storing spring 23 by the driving device 13, and this form is locked by a latch mechanism. Then, when an ON signal is inputted, the driving device 13 is restarted so that the latch mechanism is released, and the stored-energy force of the energy-storing spring 23 rapidly rotates the operation arm 17 in the ON-direction by the release.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating mechanism of an electric operating device for opening and closing a handle of a circuit breaker.

[0002]

2. Description of the Related Art FIGS.
FIG. 12 is a diagram showing a conventional circuit breaker electric operating device disclosed in JP-A-126147, and FIG.
FIG. 13 is a plan view showing a state in which the compression spring is charged in a state, and FIG. 13 is a plan view showing a state in which the compression spring is discharged when the circuit breaker shown in FIG. FIG. 14 is a perspective view showing a handle operation section and a latch mechanism section of the circuit breaker in FIG. In the drawing, reference numeral 1 denotes a handle operating portion of a circuit breaker, 1a denotes an opening / closing drive plate, 2 denotes a motor for charging a compression spring 6 described later, that is, a first drive device, 3 denotes a latch portion, and 3a denotes a latch portion 3. A roller that is rotatably supported,
Reference numeral 4 denotes a second drive unit for releasing the engagement of the latch unit 3, and is, for example, an electromagnet. 4a is a release part, 5 is a latch release part, 6 is a compression spring for closing the handle 7,
Is a well-known turning handle provided on the circuit breaker.

Next, the operation of a conventional circuit breaker electric operating device will be described. As shown in FIG. 12, when the circuit breaker is in the ON state and the compression spring 6 is in the discharged state, when an OFF signal is applied by an external switch, for example, a remote control switch (not shown), the first driving device 2
Operates to turn off the handle operation unit 1 and to compress the compression spring 6. In this middle stage, the latch unit 3 rotates in the direction of arrow A about the shaft 1b fixed to the opening / closing drive plate 1a of the handle operation unit 1, and the OFF operation is completed as shown in FIG. The completion of the OFF operation is determined by the roller 3 rotatably supported by the latch unit 3.
a is engaged with the engagement portion 5a of the latch release portion 5, and the latch is engaged, that is, the circuit breaker shown in FIG.
In the F state, the compression spring 6 maintains the charged state.

Next, when an ON signal is applied by an external switch (not shown) in a state where the circuit breaker shown in FIG. 12 is in an OFF state and the compression spring 6 is in a charged state, a second driving device 4 for releasing the latch is provided. Operates, the release unit 4a presses the surface 5b of the latch release unit 5, and the latch release unit 5 rotates in the arrow B direction. At this time, the engaging portion 5a of the latch release portion 5
The latch 3 is disengaged from the roller 3a, and the compression spring 6
When the circuit breaker shown in FIG. 13 is in the ON state, the compression spring 6 is turned on, and the handle operating portion 1 of the circuit breaker slides in the left direction (the direction shown by the arrow W), ie, the ON direction. Is in a discharged state.

[0005]

In the conventional electric operating device, the first drive device (motor) 2 for charging the compression spring and the first drive device (motor) 2 for turning off the circuit breaker as described above, and a latch. The second driving device (electromagnet) 4 for tripping the connection is required, and there is a problem that the configuration is complicated and the cost increases.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and the drive device for charging the compression spring and the drive device for releasing the engagement of the latch are the same drive device. It is intended to obtain an electric operating device for a circuit breaker.

[0007]

In the electric operating device according to the present invention, when an OFF signal is input to the operating circuit,
A driving device for turning off the circuit breaker is activated, and while the accumulating spring is being charged by the driving device, the operating arm is turned in a predetermined direction (OFF direction) to turn the handle of the circuit breaker to the OFF side. And the state is locked by the latch mechanism. Next, when an ON signal is input, the driving device is activated again to release the latch mechanism, and by this release, the energy stored in the energy storage spring causes the operating arm to rapidly rotate in the ON direction. .

[0008] Further, the above-mentioned cam for an operating arm is provided with an inclined surface which is pressed by a cam follower at the time of a manual operation so as to rotate the cam for an operating arm.

Further, by forming the tip of the sliding contact portion of the latch connecting plate with the frame as an arc-shaped contact portion, the friction of the sliding surface is reduced and the movement of the latch connecting plate is smoothly performed. It was made to become.

Further, a second engagement portion with an ON button for manual operation is provided on the latch connecting plate.

Further, a U-shaped latch in which the latch and the latch connecting plate are integrated is provided.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is an external perspective view of an electric operation device for a circuit breaker according to Embodiment 1 of the present invention. FIG. 2 is a side view showing a main part of an internal mechanism of the electric operation device according to the first embodiment of the present invention. FIG. 3-
FIG. 5 is a diagram showing a main part of an internal mechanism of the electric operating device, in which the circuit breaker is in an ON state and the compression spring is in a discharged state. Among them, FIG.
2 is a sectional view taken along line III-III, FIG. 4 is a sectional view taken along line IV-IV in FIG. 2, and FIG. 5 is a sectional view taken along line V-V in FIG. FIG. 6 shows that the circuit breaker shown in FIG.
The state during the transition from N to the OFF state is shown. 7 to 9
Fig. 7 is a view showing a main part of an internal mechanism of the electric operating device. Fig. 7 shows a state in which the circuit breaker shown in Fig. 3 is in an OFF state and a compression spring is in a charged state. Fig. 8 shows a state in which the circuit breaker shown in Fig. 4 is in an OFF state. 9 shows a state in which the compression spring is charged, and FIG. 9 shows a state in which the circuit breaker shown in FIG. 5 is in an OFF state and the compression spring is in a charged state.

1 to 9, reference numeral 50 denotes a circuit breaker;
Reference numeral 51 denotes a base of the electric operating device fixed to the circuit breaker 50;
N, an electric operation device for electrically operating the OFF operation, 54
Reference numeral 55 denotes a front panel for protecting the electric operation device 52, and reference numeral 55 denotes an operation circuit unit of the electric operation device 52. 56,5
Reference numeral 7 denotes a fixed contact and a movable contact of the circuit breaker 50.
In FIG. 1, Sa is an automatic / manual switch, and Sc is a charge lever for manually charging the energy storage spring.

Reference numeral 11 denotes a frame for supporting the components of the electric operation device 52, and a pair of parallel plates is mounted on the base 51 so as to be located around the upside down handle 53. Reference numeral 12 denotes a transmission shaft, which is transmitted at a reduced speed by a gear or the like (not shown) by a rotating power of a motor 13 as a driving device, and rotates in one predetermined direction. Reference numeral 14 denotes a switch switching cam fixed to the transmission shaft 12, and reference numeral 15 denotes a limit switch having a lever 15a. The switch switching cam 14 is configured to engage with the lever 15a to perform switching.

Reference numeral 17 denotes an operation arm, one end of which is rotatably supported by a first shaft 18 fixed to the frame 11, so as to be able to reciprocate within a predetermined rotation angle. Reference numeral 19 denotes a handle operation lever, which is rotatably supported by a second shaft 20 fixed to the other end of the operation arm 17. A pin 21 is fixed to a substantially central portion of the handle operation lever 19, and a roller 22 is rotatably attached to the pin 21. Further, the handle operation lever 19 is slid in the illustrated vertical direction (the direction indicated by the arrow ST) by the engagement of the roller 22 with the groove 11 a formed in the frame 11.

Reference numeral 23 denotes a compression spring for closing the handle 53. Both ends of the compression spring 23 are the first hook 24 and the second hook 2.
5 and the first hook 24 is
The second hook 25 is suspended on a spring retaining pin 27 fixed on the frame 11. That is, the compression spring 23 is stretched between the spring hook pins 26 and 27, and is configured to be compressed when the operation arm 17 rotates in a predetermined direction (OFF direction). Reference numeral 28 denotes a stopper pin fixed to the frame 11 and serves as a stopper for rotating the operation arm 17.

Reference numeral 29 denotes a third shaft fixed to the operation arm 17, and a pair of rollers 30 is rotatably supported at both ends thereof, and a flat surface which engages a latch 32 described later between the pair of rollers 30. A shaft engaging portion 29a is formed. Reference numeral 31 denotes a cam for an operation arm fixed to the transmission shaft 12, and has an inclined surface 31a. A latch 32 is rotatably mounted on a fourth shaft 33 fixed to the frame 11,
The operation arm 17 works so as to lock a state where the operation arm 17 is rotated in a predetermined direction (OFF direction). Therefore, latch 3
2, a latch engaging portion 32a that engages with the shaft engaging portion 29a of the third shaft 29 and an inclined surface 32b that is pressed by the third shaft 29 are formed.

Reference numeral 34 denotes a latch connecting plate, which is shown in FIGS.
As shown in the figure, the fourth shaft 33 fixed to the frame 11
It is rotatably supported on the shaft. This latch connecting plate 34
A first engagement portion 34a with which the latch release member 40 described later engages, a second engagement portion 34b with which the ON button 35 described later engages, and a predetermined interval with respect to the frame 11 A sliding contact portion 34c (also shown in FIG. 2) is formed. The sliding contact portion 34c is formed by bending the tip of the second engaging portion 34b, and is formed in an arc-shaped contact portion in order to reduce friction with the frame 11. (See Fig. 2)

Reference numeral 35 denotes an ON button for manual operation, which has a protruding portion 35a (shown in FIG. 2) which engages with the second engaging portion 34b of the latch connecting plate 34, and a plurality of grooves 35b and 35c. The grooves 35b and 35c are fitted on pins 36 and 37 fixed to the frame 11, so that the ON button 35 can slide. The pull spring 39 constantly urges in the direction of arrow U. Reference numeral 40 denotes a latch release member fixed to the transmission shaft 12 and has an engaging portion 40a that engages with the first engaging portion 34a of the latch connecting plate 34.

FIG. 10 shows an example of the operation circuit of the operation circuit unit 55. In the figure, Sa is an automatic / manual switch, Sb is a remote control switch, R1, R3, R4
Denotes a self-holding relay, and respective open / close contacts are indicated by the same reference numerals R1, R3a, R3b, and R4. Reference numeral 13 denotes a motor as a driving device, 15 denotes a limit switch, and 58 denotes a surge absorber.

Next, the operation will be described. 3 to 5 show the circuit breaker 50 in the ON state and the compression spring 23 in the discharged state. First, as shown in FIG. 3, the limit switch 15 is in an operating state in which the lever 15 a is pressed by the switch switching cam 14 fixed to the transmission shaft 12. That is, in the operation circuit of FIG. 10, the contact of the limit switch 15 is in contact with the NC. The contacts of the self-holding relays R1, R3, R4 are in a state where R1, R3a, R4 are open. As shown in FIG. 4, the operation arm cam 31 and the roller 30 supported by the third shaft 29 of the operation arm 17 are separated from each other.
The engaging portion 29a of the latch 32 and the engaging portion 32a of the latch 32 are also disengaged. Further, as shown in FIG. 5, the engaging portion 34a of the latch connecting plate 34 and the engaging portion 40a of the latch release member 40 are also in a disengaged state.

When the circuit breaker 50 is turned off (the compression spring is charged) from this state, the self-holding relays R1, R3, R4 are activated and the motor 13 is started. Accordingly, the transmission shaft 12 starts rotating, and the switch switching cam 14 fixed to the transmission shaft 12 rotates in the direction of arrow C (shown in FIG. 3). Further, the operating arm cam 31 rotates in the direction of arrow D (shown in FIG. 4). Further, the latch release member 4
0 rotates in the direction of arrow E (shown in FIG. 5).

FIG. 6 shows that the circuit breaker becomes O by the OFF operation.
It is a figure in the middle of the stage which becomes FF state. That is, when the operation arm cam 31 rotates in the direction of arrow D, the operation arm 17
The roller 30 supported by the roller 30 is pressed, and the operation arm 17 rotates about the first shaft 18 in the direction of arrow F. Due to the rotation of the operation arm 17, the handle operation lever 19 pivotally supported at one end of the operation arm 17 by the second shaft 20 moves in the direction of arrow G, and the handle 53 of the circuit breaker 50 moves in the direction of arrow G.
In the direction, and finally the OFF operation is completed. At this stage, the third shaft 29 fixed to the operating arm 17 is
The inclined surface 32b of the latch 32 is pressed, and the latch 32 is rotated by an arrow H about a fourth shaft 33 pivotally supported by the frame 11.
Rotate in the direction.

When the OFF operation is completed, as shown in FIGS. 7 to 9, the compression spring 23 is compressed and becomes charged, and the circuit breaker 50 is turned off. In this state, as shown in FIG. 7, the lever 15a of the limit switch 15 is engaged with the groove 14a of the switch switching cam 14, and the contact point of the limit switch 15 is changed from the NC side to the NO side in the operation circuit of FIG. Switch to By this switching, the contacts of the self-holding relays R1, R3, R4 are opened, and the motor 13 stops. Also,
As shown in FIG. 8, the engaging portion 32a of the latch 32 and the engaging portion 29a of the third shaft 29 fixed to the operating arm 17 are engaged, and the latch is engaged.
Is locked. At this time, the operation arm cam 31 and the roller 30 are separated from each other. Further, as shown in FIG. 9, the engaging portion 34a of the latch connecting plate 34 and the engaging portion 40a of the latch release member 40 are close to each other but not engaged.

In this state, when an ON signal is applied by an external switch to perform an ON operation, the motor 13 rotates and the transmission shaft 12 rotates. The rotation of the transmission shaft 12 causes the transmission shaft 1 to rotate.
The switch switching cam 14 fixed to 2 rotates in the direction of arrow J (shown in FIG. 7). Further, the operating arm cam 31 rotates in the direction of arrow K (shown in FIG. 8). Further, the latch release member 40 rotates in the direction of arrow L (shown in FIG. 9).
By this rotation, as shown in FIG.
0 engagement portion 40a engages with the engagement portion 34a of the latch connection plate 34, and when the rotation further proceeds, presses the engagement portion 34a, and the latch connection plate 34 is moved around the fourth shaft 33 in the direction of arrow M. To rotate. In accordance with the rotation of the latch connection plate 34, the latch 32 fixed to the same fourth shaft 33 also rotates about the first shaft 18 in the direction of arrow M as shown in FIG. The engaging portion 32a of the third shaft 29 fixed to the operating arm 17 is disengaged from the engaging portion 32a of the second arm 32. These actions are
Each of them is set to operate within a short time as compared with the operation of the OFF operation.

By the above-mentioned ON operation, the operating arm 17 is rapidly rotated in the direction of arrow N by the stored energy of the compression spring 23, and the handle operation lever 19 supported at one end of the operating arm 17 is moved in the direction of arrow P. . By this movement, the handle operation lever 19 of the circuit breaker 50 moves the handle 53 in the direction of the arrow P, and finally reaches the state shown in FIGS. 3 to 5, and the ON operation is completed. Note that the contact of the limit switch 15 comes into contact with the NC to receive the next OFF signal.

Next, the manual ON operation will be described. When the circuit breaker 50 shown in FIGS. 7 to 9 is manually turned ON by pushing the ON button 35 in the direction of arrow Q from the OFF state, the protrusion 35a of the ON button 35 is connected to the latch connecting plate. 34, the latch connecting plate 34 rotates about the fourth shaft 33 in the direction of arrow M, and the latch 3 fixed to the same fourth shaft 33 is pressed.
9 (shown in FIG. 9) also rotates in the direction of arrow M, and the third shaft 2 fixed to the engagement portion 32 a of the latch 32 and the operation arm 17.
9 is disengaged, and the operating arm 17 is connected to the compression spring 2.
3 is rapidly rotated in the direction of arrow N by the stored energy of the handle operation lever 1 which is pivotally supported at one end of the operation arm 17.
9 moves in the direction of arrow P.

At this time, the transmission shaft 12 is not rotating, but the roller 30 which is supported by the third shaft 29 fixed to the operating arm 17 moves along the orbit R line around the first shaft 18 as the center of rotation. Rotate. At this stage, the roller 30 presses the inclined surface 31a of the operating arm cam 31, and the operating arm cam 31 and the transmission shaft 12 rotate in the direction of arrow K (shown in FIG. 8). The rotation of the operating arm cam 31 rotates to a position tangent to the trajectory R of the roller 30, which is shown in FIG.
As shown in 〜4, the circuit breaker rotates to the same position as when the circuit breaker is turned ON by electric operation, and the ON operation is completed.

According to the configuration of the first embodiment, the driving device for charging the compression spring 23 of the electric operating device 52 of the circuit breaker 50 and the driving device for releasing the latch can be performed by the same driving device. The configuration of the electric operation device 52 is simple and can be manufactured at low cost.

The cam 31 for the operating arm has an inclined surface 31.
Since a is provided, the switching operation of the limit switch 15 at the time of manual and remote operation can be stabilized.

Since the sliding contact portion 34c of the latch connecting plate 34 which contacts the frame 11 is formed in an arcuate abutting portion, the friction of the sliding surface between the latch connecting plate 34 and the frame 11 is reduced, The movement of the latch connecting plate 34 becomes smooth.

Further, since the second engagement portion 34b with the ON button 35 for manual operation is provided on the latch connecting plate 34, the configuration of the manual operation portion is simplified.

Although the compression spring 23 is used as a means for rapidly rotating the operation arm 17 in the above embodiment, an urging force by a tension spring may be used depending on the structure. Further, the roller 30 may be a cam follower made of a material having low friction.

Embodiment 2 FIG. 10 is a main part side view showing an electric operation device according to Embodiment 2 of the present invention. That is, in the first embodiment, since the latch 32 and the latch connecting plate 34 operate integrally, they are formed as an integral part. In the figure, 60 is a latch,
The latch 32 and the latch connecting plate 34 shown in the first embodiment are formed in a united structure. According to the configuration of the second embodiment, the operation is stable and the electric operation device is inexpensive.

[0035]

According to the electric operating device of the circuit breaker of the present invention, the driving device for spring charging and the driving device for releasing the latch of the electric operating device are constituted by the same driving device. In addition, the configuration of the electric operation device is simple and can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an electric operating device of a circuit breaker according to a first embodiment of the present invention.

FIG. 2 is a side view showing a main part of an internal mechanism of the electric operating device according to the first embodiment of the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 2;

FIG. 5 is a cross-sectional view taken along line VV of FIG. 2;

FIG. 6 is a circuit breaker shown in FIG.
5 shows a state in which the state is being changed from the OFF state to the OFF state.

FIG. 7 shows a state where the circuit breaker shown in FIG. 3 is in an OFF state and the compression spring is in a charged state.

8 shows a state in which the circuit breaker shown in FIG. 4 is in an OFF state and the compression spring is in a charged state.

FIG. 9 shows a case where the circuit breaker shown in FIG. 5 is in an OFF state and the compression spring is in a charged state.

FIG. 10 is an operation circuit diagram of the operation circuit unit.

FIG. 11 is a side view showing a main part of an internal mechanism of the electric operating device according to the second embodiment of the present invention.

FIG. 12 is a plan view showing a conventional electric operating device of the circuit breaker, in which the circuit breaker is in an OFF state and a compression spring is in a charged state.

FIG. 13 shows a state in which the circuit breaker shown in FIG. 11 is in an ON state and the compression spring is in a discharged state.

FIG. 14 is a perspective view showing a circuit breaker handle operation unit and a latch mechanism unit in FIG. 11;

[Explanation of symbols]

11 frame, 12 transmission shaft, 13 motor (drive device), 14 switch switching cam, 15 limit switch, 17 operating arm, 19 handle lever, 2
3 compression spring, 24 first hook, 25 second hook, 26 spring hook pin, 27 spring hook pin, 30
Cam follower (roller), 31 cam for operating arm,
32 latch, 34 latch connecting plate, 35 ON button, 40 latch release member, 53 handle, 55 operation circuit unit.

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[Procedure amendment]

[Submission date] June 2, 1999 (1999.6.2)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 13 shows a state in which the circuit breaker shown in FIG. 12 is in an ON state and the compression spring is in a discharged state.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

14 is a perspective view of a handle operation portion and the latch mechanism portion of the circuit breaker in FIG. 12.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenichi Takahashi 2-6-2 Otemachi, Chiyoda-ku, Tokyo F-term in Mitsubishi Electric Engineering Co., Ltd. 5G030 AB02 FE30 XX05 YY15

Claims (5)

[Claims] 1. A frame formed so as to be mounted around an inverted handle of a circuit breaker, a driving device mounted on the frame, and supported by the frame to be rotated by the driving device. A conducting shaft, an operating arm pivotally supported by the frame and capable of reciprocating rotation within a predetermined rotation angle, and provided at one end of the operating arm, when the operating arm is rotated, A handle operating lever adapted to be engaged with the handle, a cam for an operating arm adapted to rotate in conjunction with the rotation of the transmission shaft, and a cam provided on the operating arm, Tension between a cam follower that moves to rotate a working arm in a predetermined direction (OFF direction) and a spring hook pin provided on the operating arm and a spring hook pin provided on the frame. A power storage spring that is energized when the operation arm rotates in a predetermined direction (OFF direction), a switch switching cam that rotates integrally with the operation arm cam, and a rotation of the switch switching cam. An operation circuit for starting or stopping the driving device via a limit switch that is activated by movement, a latch mechanism for locking a state in which the operation arm is rotated in a predetermined direction (OFF direction), and the operation arm A latch release mechanism for releasing the lock by the latch mechanism in conjunction with the rotation when the drive device is rotated in a state in which is locked, and when an OFF signal is input to the operation circuit. When the drive device is activated to accumulate the accumulating spring, the operating arm rotates in a predetermined direction (OFF direction) and is locked by the latch mechanism, and when an ON signal is input, Braking system is activated the latch mechanism is released, the electric operating device of the circuit breaker, characterized in that the prestressing force of the prestressing spring is so as to rapidly rotate the actuation arm ON direction by the release. 2. The cam for an operation arm is provided with an inclined surface which is pressed by a cam follower at the time of manual operation and serves to rotate the cam for an operation arm.
An electrical operating device for the circuit breaker as described. 3. The electric operation of a circuit breaker according to claim 1, wherein the tip of the sliding contact portion of the latch connecting plate with the frame is formed in an arc-shaped contact portion. apparatus. 4. The electric circuit breaker according to claim 1, wherein a second engaging portion is provided on the latch connecting plate for engaging the manual operation ON button. Operating device. 5. The electric operating device for a circuit breaker according to claim 1, further comprising a U-shaped latch in which the latch and the latch connecting plate are integrated.