JPH09320407A - Breaker tripping unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the reliability of the breaker tripping unit by letting respective electromagnets be equally burdened when the two electromagnets are provided for safety, which drive a latch maintaining a hook at its charged position. SOLUTION: Two electromagnets 405A and 405B are disposed laterally in parallel, and the upper ends of the plungers 406A and 406B of the electromagnets 405A and 405B are brought into contact with the lower ends of thrust-up bars 410A and 410B. Driving pins 412A and 412B mounted onto the eccentric positions at both ends of a rotatably supported latch A03, are fitted in slots 411A and 411B provided for the thrust-up bars 410A and 410B. Either one of the electromagnets is excited and when the thrust-up bar 410A or 410B is thereby pushed up, the latch 403 is thereby rotated so as to be removed out of a hook 401.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating mechanism for a circuit breaker operating device which is maintained in a balanced state when the circuit breaker is closed when the circuit breaker is closed, and which is operated when a breaking command is given. The present invention relates to a circuit breaker tripping device that breaks the balance of the above and transmits the operating force to the circuit breaker.

[0002]

2. Description of the Related Art In many cases, an operating device for operating a circuit breaker is a disconnection drive source for generating an operating force for opening the circuit breaker and a closing drive source for generating an operating force for closing the circuit breaker. And the drive source for breaking the circuit breaker when the circuit breaker is in the closed state, receives the force generated by the circuit and holds the drive source in the energy storage state, and the drive source for breaking the circuit is generated when the circuit breaker is opened. The operating mechanism that transmits the operating force to the movable contactor of the circuit breaker and the operating mechanism that is kept in the balanced state when the circuit breaker is in the closed state, and the balanced state of the operating mechanism when the disconnection command is given. And a tripping device for breaking the circuit breaker. The operating mechanism releases the energy stored in the breaking drive source at a stroke when the balance state is broken, and transmits the operating force generated by the driving source to the movable contactor of the circuit breaker.

In many cases, a spring (hereinafter referred to as a cutoff spring) is used as a drive source for shutting off, and a spring (makeup spring) accumulated by an electric motor or the like and an air are used as drive sources for closing. A cylinder or the like is used.

An example of the construction of the main part of this type of operating device is shown in FIGS. FIG. 9 shows the state of the operating device when the circuit breaker is in the breaking state, and FIGS. 10 and 11 show the state of the operating device when the circuit breaker is in the closed state and the tripping free state, respectively.

In these figures, 1 is an air cylinder as a driving power source attached to a frame 2 of an operating device, 3 is an operating mechanism attached to the frame 2, and 4 is a tripping mechanism also attached to the frame 2. It is a device. The air cylinder 1 includes a piston 1b (see FIG. 11) slidably fitted in the cylinder 1a and a piston rod 1c coupled to the piston, and a tip of the piston rod 1c projects toward the operation mechanism 3 side. FIG. 9 and FIG.
The retracted position shown in FIG. 11 and the advanced position shown in FIG. 11 can be displaced.

The operating mechanism 3 includes a lever 6 whose central portion is fixed to a pin 5 which is loosely fitted in a long hole 4 (see FIG. 11) provided in the frame 2, and a central portion which is pinned to the frame 2 via a pin 7. Lever 8 rotatably supported by a lever 10, and a link 10 having one end supported by a pin 5 so as to be rotatable with respect to the lever 6 and the other end connected to one end of the lever 8 via a pin 9.
A lever 12 whose center portion is rotatably supported by the frame 2 via a pin 11; a roller 13 which abuts the lever 12 to regulate its rotation; and one end of which is fixed to the frame 2 via a pin 14. Lever 15 which is rotatably supported and is almost L
A latch lever 17 that is formed in a letter shape and whose corners are rotatably supported by the frame 2 by a pin 16 and a link 1 whose one end is connected via a pin 18 near the center of the lever 15.
9, a lever 21 whose one end is connected to one end of the lever 6 via a pin 20, and a link 22 whose one end is also connected to one end of the lever 6 via a pin 20.

The latch lever 17 is biased clockwise by a spring 23 in the drawing, and the lever 8 is biased clockwise by a return spring 24. The lever 15 is biased counterclockwise by a spring 25. A roller 26 is attached to the other end of the lever 6, and a notch 17a for engaging the roller 26 is formed at the tip of the latch lever 17. A roller 27 is attached to the other end of the lever 8,
A groove 15a (see FIG. 11) for engaging the roller 27 is formed in the intermediate portion of the lever 15. Further, a stopper 28 is formed on the frame 2, and the rotation range of the lever 8 in the clockwise direction in the drawing is limited by the stopper 28.
The other end of the link 19 is connected to a trip hook 401 provided on the trip device 4 via a pin.

In the operating device shown in FIGS. 9 to 11, the lever 21 is connected to a breaking spring (not shown), and when the lever 21 is displaced leftward in the drawing, the lever spring stores energy and the breaking spring is stored. Lever 2 when is released
1 and the link 22 are driven rightward in the drawing. The link 22 is connected to a movable contactor of a breaker (not shown) via an insulating operation rod, and the breaker is opened when the link 22 moves to the right in the drawing.

The hook 401 breaks the balance position when the operating mechanism 3 is closed and the position where the operating mechanism 3 is held in a balanced state when the circuit breaker is closed, and the operating force for breaking is transmitted to the circuit breaker. It is a lever provided so as to be rotatable between a trip position and a trip position that allows it to be moved. The hook 401 is normally urged toward the trip position by a spring, and is held at the loading position by a latch in the trip device 4.

The latch of the trip device 4 holding the hook 401 at the closing position is removed when the breaker is opened. When the latch in the trip device 4 is released, the hook 401 is rotated toward the trip position (clockwise in FIGS. 9 to 11), and the rotation of the hook 401 causes the link 1 to move.
9 is displaced clockwise in the drawing and the lever 15 is rotated clockwise.

When the breaker is in the cut-off state, the lever 8 is in a position where it abuts the stopper 28 and the roller 27 is in a state where it is engaged in the groove 15a of the lever 15, as shown in FIG. Also, since the blocking spring is released, the lever 6
Is a position rotated clockwise, and the roller 26 attached to the lever 6 is located away from the notch 17a at the tip of the latch lever 17. At this time, the hook 401 of the trip device 4 has returned to the closing position, and the roller 2
7 is in a state of being engaged in the groove 15a provided in the lever 15. Further, the pin 5 is the link 10, the lever 8 and the lever 1.
5, the link 19 and the hook 401 serve to make the long hole 4
Is abutted against the left end of the drawing.

When the circuit breaker is turned on, a solenoid valve (not shown) is opened to supply compressed air into the cylinder 1. As a result, the piston rod 1c moves forward in the right direction in FIG. The piston rod 1c moves forward while the roller 26
Press to rotate the lever 6 counterclockwise. Lever 6
Since the lever 21 moves leftward with the rotation of, the breaking spring is stored. Further, the link 22 moves to the left and the circuit breaker is closed. As shown in FIG. 10, the roller 26 engages with the notch 17a at the tip of the latch lever 17 to engage the lever 6 at the position where the movable contactor of the blocking portion reaches the closing position and the accumulation of the blocking spring is completed. Stop. In this state, the solenoid valve (not shown) is closed and the supply of compressed air into the cylinder 1 is stopped, so that the piston rod 1
c is retracted to the left in the drawing by the force of a return spring (not shown) and returns to the position shown in FIG. 10, and the closing operation is completed.

In the closed state shown in FIG. 9, the rotation of the lever 6 is prevented by the engagement of the roller 26 and the latch lever 17, and the link 10, the lever 8, the lever 15, and the link 1 are also provided.
9 and the hook 401 hold the pin 5 in contact with the left end of the elongated hole 4 and receive the operating force applied from a blocking spring (not shown). The force that receives the biasing force is kept in balance.

When the circuit breaker is opened from the state shown in FIG. 10, the latch in the trip device 4 is removed and the hook 401 is rotated to the trip position. The rotation of the hook 401 causes the lever 15 to rotate in the clockwise direction in the drawing via the link 19, so that the roller 27 causes the groove 1 of the lever 15 to rotate.
Deviates from 5a. Therefore, the balance of the operating mechanism 3 is lost and the lever 8 is rotated counterclockwise in the drawing by the biasing force of the blocking spring. At this time, the pin 5 moves in the elongated hole 4 toward the right end, so that the lever 6 loses its fulcrum and moves to the right by the urging force of the blocking spring, and at the same time, the link 22 moves to the right to move the blocking part of the blocking part. The movable contact is displaced to the cutoff position. The state of the operating mechanism at this time is the same as the free trip state shown in FIG. When the operation mechanism collapses to the state shown in FIG. 11, the biasing force of the return spring 24 causes the lever 8 to move.
Is rotated clockwise to return to the position shown in FIG. 9, the hook 401 of the trip device 4 is reset to the closing position, and is held in the closing position by the latch in the trip device.

When a breaking command is given during the closing operation of the circuit breaker, once the movable contactor of the breaking portion reaches the closing position, the hook 40 is operated as in the breaking operation.
1 rotates to the trip position. As a result, the lever 15 rotates in the clockwise direction to release the restraint of the lever 8, so that the breaking operation is immediately performed. This state is the free trip state shown in FIG. In this state, the repetitive action prevention relay operates to hold the electromagnetic valve for supplying the compressed air into the air cylinder 1 in the closed state, so that the closing action is not performed even if the closing command is continuously given. .

Conventionally, the tripping device 4 used in the above-mentioned circuit breaker operating device is constructed as shown in FIGS. 6 to 8. In these figures, 401 is a tripping hook, 402 is a frame of the tripping device, 403 is a rotatably supported frame 402, and a locking position for restraining the hook 401 at the insertion position and an unlocking for releasing the restraint of the hook 401. A latch that can be rotated between the positions and a latch drive mechanism 404 that drives the latch 403 using the first and second electromagnets 405A and 405B as drive sources.

As shown in FIG. 8, the trip hook 401 is composed of a lever having a latch contact portion 401a at its tip and a stopper projection 401b at its rear end.
The portion near the rear end is pinned to the frame 40 by the pin 407.
2 and is connected to the aforementioned link 19 by a pin 408.

In the state shown in FIGS. 6 and 7, the hook 4
01 is at the insertion position, and the position slightly rotated clockwise from the illustrated position is the hook trip position. The hook 401 is constantly biased toward the trip position side (clockwise in the drawing) by a torsion spring 409.

The latch 403 has a groove 403a having a width dimension capable of receiving the tip portion of the hook 401 at a position corresponding to the hook 401, and as shown in FIG. The hook contact portion 401a at the tip of the hook is brought into contact with the portion of
01 is restrained in the closing position, and the hook 40 is slightly rotated clockwise (until the unlocked position) from the position shown in FIG.
The tip of No. 1 is received in the groove 403a and the restraint of the hook is released.

The first electromagnet 405A has a first plunger 406A extending in the vertical direction and a first trip coil 407A which drives the first plunger 406A to be displaced upward when excited. First plunger 406
A push-up rod 410 is attached to the upper end of A. The push-up rod 410 is provided with a long hole 411, and the latch 40
A drive pin 412 fixed at an eccentric position on the end surface of one end side of 3 is loosely fitted in the elongated hole 411 so that the latch 403 can be rotated to the unlocked position when the push-up rod 410 is driven upward. It has become.

The second electromagnet 405B has a second plunger 406B extending in the vertical direction and a second trip coil 407B for driving the second plunger 406B to displace it upward when it is excited. The first electromagnet 40
It is arranged below 5A in a state of sharing an axis with the first electromagnet. The upper end of the second plunger 406B is the first
Of the second plunger 4 when the second trip coil 407B is excited by being brought into contact with the lower end of the plunger 406A of
05B pushes up the push rod 4 via the first plunger 406A.
The latch 10 is pushed up to rotate the latch 403 to the unlocked position. The push-up rod 410 is biased downward by the return spring 413, and when the first electromagnet and the second electromagnet are not excited, the push-up rod 410 is positioned at the lower limit position and the latch 403 is chained. It is designed to be held in the locked position. Further, in order to return the plunger 406B of the second electromagnet 405B to the lower limit position,
A return spring 414 for urging the plunger 406B downward.
Is provided. In this example, the first and second electromagnets 405A and 405B, the push-up rod 410, and the drive pin 41.
2 and the return springs 413 and 414.
04 is configured.

In the above trip device 4, in order to ensure reliability, the first electromagnet 405A and the second electromagnet 405B are provided in series in the vertical direction, and even if one electromagnet is damaged, the other electromagnet is broken. By exciting the electromagnet of (1), the hook 401 can be pulled out to open the circuit breaker.

Normally, the latch 403 is driven by the first electromagnet 405A to pull off the hook 401. When the trip coil 407A of the first electromagnet 405A is excited, the first plunger 406A is displaced upward and the push-up rod 41 is moved.
0 is pushed up and the latch 403 is rotated to the unlocked position via the drive pin 412. This makes the trip hook 401
Is disengaged from the latch 403 and rotated to the trip position. When the hook 401 rotates to the trip position, the link 1
9 is displaced in the clockwise direction to break the balanced state of the operating mechanism 3 and to perform the breaking operation.

When the first electromagnet 405A is damaged, the latch 403 is driven by the second electromagnet 405B to pull off the hook 401. When the trip coil 407B of the second electromagnet 405B is excited, the second plunger 406B pushes up the push-up rod 410 via the first plunger 406A to rotate the latch 403 to the unlocked position, and the hook. Rotate 401 to the trip position.

[0025]

In the conventional trip device 4 shown in FIGS. 6 to 8, the first electromagnet 405 is used.
Since A and the second electromagnet 405B were arranged in series, when the latch 403 is driven by the second electromagnet 405B and the hook 401 is pulled out, the plunger 406B of the second electromagnet is moved to the first electromagnet. It was necessary to drive the push-up rod 410 via the plunger 406A. Therefore, the load on the second electromagnet 405B is larger than the load on the first electromagnet 405A, and when the same rating is used as the first electromagnet 405A and the second electromagnet 405B, The first is the contact opening time of the circuit breaker when the hook is pulled out using the second electromagnet 405B (the time required to open the circuit breaker after the breaking command is given).
There is a problem that it takes longer than the contact opening time when the hook is pulled out by using the electromagnet 405A, and the reliability is reduced.

When it is attempted to make the contact opening times of the circuit breaker equal when the hook is pulled off using the first electromagnet 405A and when the hook is pulled off using the second electromagnet 405B, the second electromagnet 405B As the first electromagnet 40
It is necessary to use the one whose output is considerably larger than 5 A, and it is unavoidable that the cost becomes high.

An object of the present invention is to use the same rating as the first and second electromagnets so that the opening times of the circuit breakers can be made equal regardless of which electromagnet is used to pull the hook apart. It is to provide a circuit breaker trip device.

[0028]

SUMMARY OF THE INVENTION According to the present invention, a closing position, which is a position for holding an operating mechanism for transmitting an operating force to a circuit breaker in a balanced state when the circuit breaker is closed, and a balanced state when the operating mechanism is closed are broken. A trip hook which is provided so as to be rotatable between a trip position and a trip position, which is a position that allows the operation force for interruption to be transmitted to the circuit breaker, and is always biased to the trip position side. , Supported so that it can reciprocally rotate between the locking position and the unlocking position, restrains the hook in the closing position when in the locking position, and hooks when rotated toward the unlocking position Circuit breaker with a latch provided to release the restraint of the hook and allow the hook to rotate toward the trip position, and a latch drive mechanism for rotating the latch toward the unlock position. It relates to the removal device.

In the present invention, the latch driving mechanism is
A first electromagnet having a first trip coil and a first plunger that is driven to generate a displacement when the first trip coil is excited; a second trip coil; and a second trip coil. Second electromagnet having a second plunger that is driven to generate a displacement when the trip coil is excited, and the first plunger and the second plunger to rotate the latch toward the unlocked position. And a displacement transmitting mechanism for transmitting the displacement of each of the first and second plungers to the latch without transmitting the displacement of each of the first and second plungers to the latch. The second electromagnets were arranged in parallel with each other.

As described above, the first and second electromagnets are arranged in parallel, and the displacements of the first and second plungers are transmitted to the latch without passing through other plungers. Since the latches can be driven with the same operating force by each electromagnet, the first electromagnet and the second electromagnet having the same rating are used, and the hook is pulled after each electromagnet is driven. The time to be removed can be made equal. Therefore, it is possible to make the contact opening time of the circuit breaker the same regardless of which electromagnet is used to pull the hook off, and to enhance the reliability of the circuit breaker trip device.

The latch is arranged with its central axis oriented in the horizontal direction, and is supported so that it can reciprocate between the locking position and the unlocking position with the central axis as the center of rotation. It is normal.

In this case, the latch driving mechanism is provided vertically movable on one end side and the other end side of the latch in the axial direction, and moves the latch from the locking position to the unlocking position when displaced upward. First and second push-up rods having upper ends connected to one end and the other end of the latch via a first drive pin and a second drive pin, respectively, at positions eccentric to the central axis of the latch so as to rotate. And a first plunger whose upper end is in contact with the lower end of the first push-up rod and a first trip coil that drives the first plunger to be displaced upward when excited. A second trip coil for driving the first electromagnet and the second plunger whose upper end is in contact with the lower end of the second push-up rod to drive the second plunger to be displaced upward when excited. And a second electromagnet provided with.

With the above construction, the first and second electromagnets are arranged side by side in the lateral direction, so that the vertical dimension of the trip device can be reduced, and the longitudinal direction of the space for arranging the operating device can be reduced. When the dimensions are limited, the space efficiency in arranging the components of the operating device can be increased, and the operating device can be made compact.

Further, the latch drive mechanism is vertically movable at one end side of the latch in the axial direction, and is adapted to rotate the latch from the locking position to the unlocking position when it is displaced upward. A push-up plate whose upper end is connected to one end of the latch via a drive pin at a position eccentric from the central axis of the latch, and a push-up plate whose upper surface is abutted against the lower end of the push-up rod so as to be vertically movable. And a first trip coil having a first plunger whose upper end is in contact with the lower surface of the push-up plate and a first trip coil that drives the first plunger to be displaced upward when excited. And a second electromagnet having a second plunger whose upper end is in contact with the lower surface of the push-up plate and a second trip coil for driving the second plunger to displace it upward when it is excited. Can be configured with.

When the push-up bar is driven through the push-up plate as described above, it is preferable that the first and second electromagnets are arranged side by side in a direction perpendicular to the axial direction of the latch. By arranging the first and second electromagnets in this manner, the width dimension of the tripping device can be reduced when the tripping device is viewed from a direction perpendicular to the axial direction of the latch.

[0036]

1 and 2 show an example of the structure of a trip device 4 according to the present invention. FIG. 1 is a side view showing a part in section, and FIG. FIG. 3 is a front view showing a cross section, and FIG. 3 is an explanatory view showing a positional relationship between hooks and latches. 1 and 2, reference numeral 401 represents FIGS. 6 and 7.
As shown in FIG. 3, this hook has a latch contact portion 401a at its tip and a stopper projection 40 at its rear end as shown in FIG.
It consists of a lever with 1b.

Reference numeral 402 denotes a frame of the tripping device. The frame includes a base plate portion 402a whose plate surfaces are arranged in the horizontal direction, and a pair of vertical plates which are vertically erected from substantially the center of the base plate portion 402a. Parts 402b and 402c, and projecting parts 402d and 402e provided in a state of projecting outward in the horizontal direction from the upper ends of the vertical plate parts 402b and 402c,
The four corners are overlapped with the lower surface of the substrate portion 402a and the four bolts 4
Flat plate portion 402 fastened to the substrate portion 402a by 02f
g and the lower support frame 4 disposed below the flat plate portion 402g.
It consists of 02h. The lower support frame 402h includes a horizontal plate portion 402h1 arranged in parallel with the flat plate portion 402g and a bent portion 402h2 bent at a right angle downward from one end of the horizontal plate portion 402h1.
Are connected to the substrate portion 402a via bolts 402i. This frame 402 is shown in FIGS.
It is fixed to the frame 2 of the operation mechanism as shown in FIG.

The upper ends of the bolts 402i connecting the board portion 402a and the lower support frame 402h penetrate through the holes provided at the four corners of the flat plate portion 402g and are screwed into the screw holes provided in the board portion 402, respectively. A lock nut 402j screwed to the bolt 402i is fastened to the flat plate portion 402g. The lower end of the bolt 402i has a horizontal plate portion 402.
The bolts 402i and the horizontal plate portion 402h1 are coupled by the nuts 402k and 402m inserted into the holes provided at the four corners of h1 and screwed into the bolts 402i.

The hook 401 is the vertical plate portion 40 of the frame.
2b, 402c, and a portion near the rear end thereof is rotatably supported by the vertical plate portions 402b, 402c by a pin 407, and is supported by the pin 408 in FIG.
It is connected to the link 19 of the operating mechanism 3 shown in FIG. Plate-shaped spacers 420 and 421 are inserted between the hook 401 and the vertical plate portion 402b and between the hook 401 and the vertical plate portion 402c, respectively, and these spacers are fixed to the vertical plate portions 402b and 402c, respectively. There is. The hook 401 is rotated between the spacers 420 and 421 between a closing position for maintaining the balance when the operating mechanism is closed and a trip position for breaking the balance of the operating mechanism to perform the blocking operation. 1 and 2 show a state in which the hook 401 is in the insertion position.

A torsion spring 409 is attached to the pin 407. One end of the torsion spring 409 is fixed to the pin 408 and the other end is fixed to the hook 401. The torsion spring 409 constantly urges the hook 401 toward the trip position (clockwise in FIGS. 1 and 3).

Vertical plate portions 402b, 40 of the frame 402
2c has sleeve-shaped bearings 422 in the holes respectively provided
And 423 are attached, and a cylindrical latch 403 is rotatably supported inside these bearings. In the illustrated example, the latch 403 is halved at its central portion to facilitate assembly, and the first half 40 having a target shape is formed.
3A and a second half 403B. Each of these halves 403A and 403B has a separate bearing 42.
After being inserted inside 2 and 423, they are joined and integrated by a pin 424.

First half 403A of latch 403 and second half
Flanges 403A1 and 403B1 that are in sliding contact with the outer end surfaces of the bearings 422 and 423 are provided on the outer end portion of the half portion 403B, and these latches prevent the latch 403 from coming off.

As shown in FIG. 3, the latch 403 has a groove 403a having a size capable of receiving the hook 401 at a position facing the hook 401 at the center thereof.
As shown in FIG. 3, the latch 403 restrains the hook 401 at the insertion position by bringing the latch abutment portion 401a at the tip of the hook 401 into contact with a portion of the outer peripheral portion near the groove 403a, as shown in FIG. When it is slightly rotated clockwise (to the unlocked position) from the position shown in (1), the tip of the hook 401 is received in the groove 403a to release the constraint of the hook.

A first end extending in the axial direction of the latch 403 is located at a position eccentric from the central axis of the latch on each of the one end face and the other end face of the latch 403 in the axial direction.
Drive pin 412A and second drive pin 412B are attached. The first drive pin 412A and the second drive pin 412B are provided with their axes shared.

Overhanging portions 402d, 40 of the frame 402
Reference numeral 2e has a through hole extending vertically in positions corresponding to the drive pins 412A and 412B fixed to one end and the other end of the latch 403, respectively. The second guide fittings 430A and 430B are fitted together. Each of these guide metal fittings has a flange at the upper end thereof, and bolts 431 and nuts 43 are provided on the overhanging portions 402d and 402e of the frame.
By the pressing plates 433A and 433B fixed by 2, the respective flanges of both guide metal fittings 430A and 430B are fixed in a state of being pressed against the projecting portions 402d and 402e.

Further, the base plate portion 402a and the flat plate portion 402g of the frame are provided with through holes which share an axis line with the first and second guide fittings 430A and 430B, respectively. Second thrust bearings 434A and 434B are mounted. Inner holes of the first and second guide fittings 430A and 430B and the first and second thrust bearings 434A and 434B.
The first and second push-up rods 410A and 410, respectively.
The upper and lower ends of B are slidably fitted together. Enlarged diameter portions 410A1 and 410B1 are provided in the respective intermediate portions of the first push-up rod 410A and the second push-up rod 410B, and the long holes 4 provided in these enlarged diameter portions 4 respectively.
11A and 411B each have a first drive pin 412A
And the second drive pin 412B is loosely fitted. The first drive pin 412A and the second drive pin 412B are latches 4
Since it is provided at an eccentric position on the end face of 03, when the push-up rods 410A and 410B are vertically displaced, the latch 40
3 rotates. In the illustrated example, the push-up rods 410A and 4A
The mounting positions of the drive pins 412A and 412B are set so that the latch 403 rotates clockwise in FIGS. 1 and 3 when 10B is displaced upward.
The first and second push-up rods 410A and 410B are biased downward by return springs 413A and 413B, respectively, and the latches 403 are constantly locked by the biasing forces of the return springs 413A and 413B (shown in FIG. 3). Position)
Is biased to the side.

The first electromagnet 405A and the second electromagnet 4 are attached to the horizontal plate portion 402h1 of the lower support frame 402h of the frame.
And 05B are arranged side by side in the lateral direction.
The first electromagnet 405A has a first plunger 406A and a first trip coil 407A, and when the trip coil 407A is excited, the first plunger 40A.
6A is driven to be displaced upward. The second electromagnet 405B is connected to the second plunger 4
06B and a second trip coil 407B,
When the trip coil 407B is excited, the second plunger 406B is driven to be displaced upward.

The first electromagnet 405A is in a state in which the first plunger 406A is directed toward the first push-up rod 410A and the center axis of the first plunger 406A is the first axis.
Is attached to the horizontal plate portion 402h1 in a state of being aligned with the central axis of the push-up rod 410A of the first plunger 406
The upper end of A is in contact with the lower end of the first push-up rod 410A.

In the second electromagnet 405B, the second plunger 406B is directed to the second push-up rod 410B side, and the central axis of the second plunger 406B coincides with the central axis of the second push-up rod 410B. Horizontal plate part 40
Second plunger 406B attached to 2h1
Has an upper end abutted on a lower end of the second push-up rod 410B.

The first plunger 406A and the second plunger 406B are respectively provided with return springs 414A and 414.
B is urged downward (to the side opposite to the push-up rods 410A and 410B).

Vertical plate portions 402b and 4 of the frame 402
02c, a stopper pin 435 that abuts the stopper protrusion 401b at the rear end of the hook 401 is attached, and the abutment of the stopper protrusion 401b and the stopper pin 435 causes the hook 401 to rotate to the insertion position side. The range of motion is limited.

Further, the outer surface of the vertical plate portion 402b and 402
Stoppers 436A and 436B that bring the drive pins 412A and 412B into contact with the outer side surfaces of c are bolted, and the drive pins 412A and 412B are stopped by the stopper 436.
By touching the upper surfaces of A and 436B, the latch 40
3 is positioned at the locking position (the position shown in FIG. 3).

In the example shown in FIGS. 1 to 3, the first and second push-up rods 410A and 410B, and the first and second push-up rods 410A and 410B.
Drive pins 412A and 412B and return spring 413A
And 413B constitute a displacement transmission mechanism that transmits the displacements of the first plunger 406A and the second plunger 406B to the latch so as to rotate the latch 403 toward the unlocked position. The displacement transmission mechanism and the first And the second
Latch mechanism 4 by means of electromagnets 405A and 405B of
04 is configured.

In the trip device 4 shown in FIGS. 1 to 3, when the trip coil 407A of the first electromagnet 405A is excited, the first plunger 406A is displaced upward and the first push-up rod is moved. Push up 410A, latch 4
03 is rotated to the unlocking position side. This makes the hook 40
Since 1 rotates toward the trip position, the balance of the operating mechanism is broken and the shutoff operation is performed. Since the second push-up rod 410B and the plunger 407B of the second electromagnet are only in contact with each other and are not connected, the first push-up rod 410A is pushed up by the first electromagnet 405A to push the latch 403. When driven, the second electromagnet 405B does not become a load.

When the trip coil 407B of the second electromagnet 405B is excited, the second plunger 40 is
6B pushes up on the second push-up rod 410B and latches 403.
Rotate to the unlocked position side. As a result, the hook 401 rotates toward the tripping position to break the balance of the operating mechanism and cause the breaking operation. Since the first push-up rod 410A and the plunger 407A of the first electromagnet are not connected, the second push-up rod 4A is connected by the second electromagnet 405B.
The first electromagnet 405A does not become a load when pushing up 10B to drive the latch 403.

With the above configuration, the first electromagnet 4
Since it is possible to drive the latch 403 with the same movement when either the 05A or the second electromagnet 405B is driven, even if both electromagnets having the same rating are used, the latches can be driven by the respective electromagnets. The circuit breaker opening time when the hook is tripped can be made the same, and the reliability of the trip device can be improved.

Further, when the first and second electromagnets are arranged side by side in the lateral direction as described above, the height dimension of the trip device can be reduced, so that the operating device is arranged at a position where the height is limited. In this case, the space efficiency in arranging the parts can be improved, and the operating device can be compactly assembled.

In the example shown in FIGS. 1 and 2, the latch 403 is used.
1st and 2nd push-up rods 410A and 410B are arranged on both sides of, respectively, and these push-up rods are driven by the 1st and 2nd electromagnets 405A and 405B arranged side by side in the axial direction of the latch. However, in the present invention, at least the first and second electromagnets of the latch drive mechanism are provided in parallel with each other, and the displacement of each of the first and second plungers respectively provided in the first and second electromagnets is increased. Need only be transmitted to the latch without passing through another plunger, and the configuration of the latch drive mechanism is not limited to the above example.

4 and 5 show another example of the structure of the trip device according to the present invention. In this example, the latch 40 is provided.
3 is composed of a single cylindrical member having a flange 403A1 at one end, and the latch 403 is inserted into the bearings 422 and 423 from one bearing 422 side, and the latch 403 protruding outward from the bearing 423 side. The split pin 441 is inserted into the hole provided at the other end, and the latch 4 is inserted by the split pin.
It is designed to prevent 03 from coming off. Although not shown in FIGS. 4 and 5, the spacer 42 at the center of the latch 403 is provided.
At the position facing the gap between 0 and 421, the groove 4 shown in FIG.
A groove similar to the groove 03a is formed, and the tip of the hook 401 is received in the groove 403a so that the hook can be pulled off. A drive pin 412A is attached to an end surface of one end of the latch 403 at an eccentric position.

In the example shown in FIG. 1, the projecting portions 402d and 402e are provided at the upper end of the frame 402.
In the example shown in FIGS. 4 and 5, the protruding portion 402d on one side is
Only the bolt 43 is provided on the overhanging portion 402d.
The guide fitting 430A is attached by means of the No. 1 and the nut 432 and the holding plate 433A. Guide bracket 430A
The upper end of the push-up rod 410A is slidably fitted in the hole inside the frame, and the lower end of the push-up rod 410A is connected to the frame 402.
Bearing 4 mounted in a hole penetrating the substrate portion 402a of
It is slidably fitted to 34A. Push rod 41
The drive pin 412A is loosely fitted in the elongated hole formed in the enlarged diameter portion 410A1 provided in the middle portion of the push rod 410A.
When A is displaced upward, the latch 403 is turned from the locking position (the position that locks the hook 401 to the closing position) to the unlocking position (the position that allows the hook 401 to rotate to the trip position). It is designed to move.

The lower support frame 402h of the frame 402 is
The horizontal plate portion 402h1 is arranged such that the longitudinal direction of the horizontal plate portion 402h1 is oriented in a direction perpendicular to the axial direction of the latch 403, and the plurality of bolts 443 and the nuts 444 screwed into the bolts 443 cause the frame It is connected to the substrate portion 402a. Also, the horizontal plate portion 402h1 of the frame and the substrate portion 4
Two guide rods 445A and 4a whose upper and lower ends are fixed to 02a and extend vertically in parallel with each other.
45B is provided, and the push-up plate 446 is supported by these guide rods so as to be vertically movable. Push-up plate 446
In order to smoothly perform the vertical movement of the above, the thrust plate to which the guide rods 445A and 445B are slidably fitted is attached to the push-up plate 446.

In the illustrated example, the push-up plate 446 is the latch 403.
Of the push-up plate 446. The push-up bar 410A is formed at the center of the upper surface of the push-up plate 446.
Is in contact with the lower end.

The horizontal plate portion 402h1 of the lower support frame 402h has a first electromagnet 405A and a second electromagnet 405B.
Is attached with the first and second plungers 406A and 406B projecting upward, and the upper ends of these plungers 406A and 406B are attached to the push-up plate 44.
It is in contact with the lower surface of 6.

In the illustrated example, the first plunger 406A
The center axes of the push-up rod 410A and the second plunger 406B are located on the same vertical plane, and the first plunger 406A and the second plunger 406B are located.
Are arranged at symmetrical positions on both sides of the central axis of the push-up rod 410A so that the first and second electromagnets 405A and 405 are arranged.
The positions of B and the push-up rod 410A are set.

The first plunger 406A and the second plunger 406B are respectively provided with return springs 414A and 414.
B is urged downward (to the side opposite to the push-up plate 446),
The push-up rod 410A is biased downward (toward the push-up plate 446) by the return spring 413A. Other points are the same as the examples shown in FIGS. 1 and 2.

In the example shown in FIGS. 4 and 5, when either the first electromagnet 405A or the second electromagnet 405B is excited, the plunger of the excited electromagnet pushes up the push-up plate 446. Push rod 41
0A is pushed up and the latch 403 is driven. Other points are the same as the examples shown in FIGS. 1 and 2.

As shown in FIGS. 4 and 5, the drive pin 412A is provided only on one end side of the latch 403, and the drive pin 412A is provided.
When the latch 403 is driven by loosely fitting 12A into the long hole provided in the push-up rod 410A, the latch 40
Since it is not necessary to divide 3 into two, it is possible to simplify the structure of the latch. Further, since only one push-up rod is required, the overall structure of the latch driving mechanism can be simplified.

Further, as in the example shown in FIGS. 4 and 5,
When the two electromagnets 405A and 405B are arranged side by side in a direction perpendicular to the axial direction of the latch 403, the width of the device when the trip device is viewed from the direction orthogonal to the axial direction of the latch. The size can be reduced.

In the above example, the trip device according to the present invention is applied to the operating device having the operation mechanism constructed as shown in FIGS. 9 to 11. However, the trip device according to the present invention is applied. The applicable operating device is not limited to the one shown in FIG. 9 to FIG. 11, and the drive force generated by the drive source for interruption at the time of closing the circuit breaker and the force for receiving the drive force are balanced. When the hook is tripped, the balance state is broken to release the force accumulated in the breaking drive source at a stroke to give the breaker an operating force for breaking. It may have any configuration.

[0070]

As described above, according to the present invention, the first and second electromagnets are arranged in parallel, and the respective displacements of the first and second plungers are latched without interposing other plungers. Since it is configured to be transmitted to, the latch can be driven with the same operating force by each electromagnet. Therefore, it is possible to use the same rating as the first electromagnet and the second electromagnet, and to equalize the time from the driving of each electromagnet to the detachment of the hook. Even when the hook is pulled out, the contact opening time of the circuit breaker can be made the same to improve reliability.

[Brief description of drawings]

FIG. 1 is a side view showing a partial cross section of a configuration example of a trip device according to the present invention.

2 is a front view showing a cross section of a part of the trip device shown in FIG. 1. FIG.

3 is an explanatory view showing a relationship between hooks and latches used in the trip device of FIG. 1. FIG.

FIG. 4 is a side view showing a partial cross-section of another configuration example of the trip device according to the present invention.

5 is a front view showing a cross section of a part of the trip device shown in FIG.

FIG. 6 is a side view of a conventional trip device.

FIG. 7 is a front view showing a part of the trip device of FIG. 6 in a sectional view.

8 is an explanatory view showing the relationship between hooks and latches used in the trip device of FIG.

FIG. 9 is a diagram showing a configuration example of a main part of a circuit breaker operating device to which a trip device according to the present invention is applied. FIG. is there.

10 is a configuration diagram showing a state of the operating device of FIG. 9 when the circuit breaker is in a closing state.

11 is a configuration diagram showing a tripping-free state of the operating device of FIG. 9. FIG.

[Explanation of symbols]

 401 hook 402 frame 403 latch 405A first electromagnet 405B second electromagnet 406A first plunger 406B second plunger 407A first trip coil 407B second trip coil 410A first push-up rod 410B second Push-up bar 411A First long hole 411B Second long hole 412A First drive pin 412B Second drive pin 446 Push-up plate

Claims (4)

[Claims] 1. A circuit breaker for breaking the operating mechanism for transmitting an operating force to the circuit breaker by breaking the closing position, which is a position for holding the operating mechanism in a balanced state when the circuit breaker is closed, and the balanced state when the operating mechanism is closed. A trip hook that is provided so as to be rotatable between a trip position, which is a position that allows operation force to be transmitted, and is constantly biased toward the trip position; a locking position; and an unlocking position. The hook is supported so that it can reciprocate between the position and the lock position, and the hook is restrained in the closing position, and the hook is released when rotated toward the unlock position. And a latch provided to allow the hook to rotate toward the trip position, and a latch drive mechanism that rotates the latch toward the unlock position, a circuit breaker trip device, The latch drive mechanism includes a first trip coil and the first trip coil. A first electromagnet having a first plunger which is driven to generate a displacement when the release coil is excited; a second trip coil; and a second trip coil which is driven when the trip coil is excited. And a second electromagnet having a second plunger that causes displacement, and a displacement that transmits the displacement of each of the first plunger and the second plunger to the latch so as to rotate the latch toward the unlocked position. A transmission mechanism, so that respective displacements of the first and second plungers are transmitted to the latch without passing through other plungers,
At least a first electromagnet and a second electromagnet of the latch drive mechanism are arranged in parallel with each other, and a circuit breaker trip device is provided. 2. A circuit breaker for breaking the operating mechanism for transmitting an operating force to the circuit breaker, by breaking the closing position at which the operating mechanism is closed and the balance position when the operating mechanism is closed. A hook that is provided so as to be rotatable between a trip position, which is a position that allows operation force to be transmitted, and that is constantly urged toward the trip position, and the central axis line is oriented horizontally. Is supported in such a manner that it can be reciprocally rotated between the locking position and the unlocking position about the central axis as the center of rotation, and the hook is restrained in the closing position when in the unlocking position, and unlocked. A latch provided to release the restraint of the hook when rotated toward the position and allow the hook to rotate toward the trip position, and a latch for rotating the latch to the unlocked position. In a circuit breaker trip device having a drive mechanism, The latch driving mechanism is vertically movable at one end side and the other end side in the axial direction of the latch, and rotates the latch from the locking position to the unlocking position when displaced upward. First and second push-up rods, the upper ends of which are eccentric to the central axis of the latch and which are connected to one end and the other end of the latch via a first drive pin and a second drive pin, respectively. A first plunger having an upper end abutting on a lower end of the first push-up rod, and a first trip coil for driving the first plunger to be displaced upward when excited A first electromagnet, a second plunger whose upper end is in contact with the lower end of the second push-up rod, and a second pull that drives the second plunger to displace it upward when excited. And a second electromagnet having a removal coil. Breaker trip device. 3. A circuit breaker for breaking the operating mechanism for transmitting an operating force to the circuit breaker by breaking the closing position, which is a position for holding the operating mechanism in a balanced state when the circuit breaker is closed, and the balanced state when the operating mechanism is closed. A hook that is provided so as to be rotatable between a trip position, which is a position that allows operation force to be transmitted, and that is constantly urged toward the trip position, and the central axis line is oriented horizontally. Is supported in such a manner that it can be reciprocally rotated between the locking position and the unlocking position about the central axis as the center of rotation, and the hook is restrained in the closing position when in the unlocking position, and unlocked. A latch provided to release the restraint of the hook when rotated toward the position and allow the hook to rotate toward the trip position, and a latch for rotating the latch to the unlocked position. In a circuit breaker trip device having a drive mechanism, The latch driving mechanism is provided movably up and down on one end side in the axial direction of the latch, and when it is displaced upward, the center of the latch is rotated so as to rotate the latch from the locking position to the unlocking position. A push-up rod whose upper end is connected to one end of the latch via a drive pin at a position eccentric from the axis, and a push-up plate which is supported so as to be vertically movable and whose upper surface is in contact with the lower end of the push-up rod. A first electromagnet including a first plunger whose upper end is in contact with the lower surface of the push-up plate, and a first trip coil that drives the first plunger to be displaced upward when excited. A second plunger having an upper end in contact with the lower surface of the push-up plate, and a second trip coil that drives the second plunger to be displaced upward when excited. Circuit breaker tripping device, comprising: 4. The circuit breaker trip device according to claim 3, wherein the first and second electromagnets are arranged side by side in a direction perpendicular to the axial direction of the latch.