JPS6239576Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is an operating device for a circuit breaker, particularly a circuit breaker operating device equipped with a locking mechanism that locks the operating handle on the closing operation side of the circuit breaker. It is related to.

[Conventional equipment and its problems]

In this type of circuit breaker operating device, when the circuit breaker interrupts an overcurrent and is tripped, it is desirable to display that it is in a trip state on the display of the operating device. Due to the following reasons, it is necessary to use a circuit breaker with special operating force characteristics and it is expensive, so conventionally, most circuit breaker operating devices with a locking mechanism are not equipped with a trip display mechanism. Not yet.

Next, the reason why it is difficult to provide a trip display mechanism in a circuit breaker operating device equipped with a locking mechanism will be explained. Figures 1, 2, and 3 show the basic configuration of an operating device for a circuit breaker equipped with a locking mechanism. Consisting of:
This operating device is connected to the circuit breaker CB by a base S, and the operating end P of the operating device is connected to the circuit breaker CB.
When the circuit breaker operating part Q of the CB is grasped and the operating handle HD is rotated, this operating force is transmitted to the operating end P via the link device M, and the rotation of the operating end P causes the breaker operating part to rotate. The operating force in the vertical direction is transmitted to Q.
As shown in Fig. 2, when the circuit breaker CB is in the closed state, the circuit breaker operating part Q remains at the closed position, when the circuit breaker CB is in the trip state, it remains at the trip position, and when the circuit breaker CB is in the open state, it remains at the trip position. Comes to rest in the open position.

Now, if the circuit breaker CB cuts off the overcurrent and is tripped when the circuit breaker is locked, and the circuit breaker operating part Q moves to the trip position, the operating handle HD will rotate to the trip display point as shown in Figure 1. A case will be described in which the locking hole of the locking device L into which the locking pin (not shown) is inserted is fan-shaped (see FIG. 1h) so that the locking pin (not shown) of the locking device L is inserted. By configuring like this,
When the circuit breaker CB interrupts an overcurrent and is tripped, the operating handle HD can rotate to the trip display point to indicate that the circuit breaker CB is tripped, but it cannot be locked. If the operation handle HD is accidentally rotated to the trip display point, the trip display will be displayed even though the circuit breaker CB is closed. To explain this further,
Generally, in a circuit breaker CB, when operating the circuit breaker operating part Q in the closing direction or opening direction, when the operating force is stopped midway, the circuit breaker CB automatically returns to the closing direction depending on the current position of the operating part Q. There is a range and a range in which the circuit automatically returns to the open direction, and the boundary point between these two ranges, that is, the switch point in the return direction, is the closed circuit indicating point in a general circuit breaker, as shown by line A in Figure 4. and the trip display point. If the return direction switching point is located between the trip display point and the open circuit display point as shown in line B in Figure 4, even if the operating handle HD is accidentally rotated in the trip direction when locking, The operating handle HD automatically returns to the closed circuit indicating point, but in general circuit breakers, the return direction switching point is located midway between the closed circuit indicating point and the trip indicating point, as shown in line A, as described above. Therefore, if the operating handle HD is erroneously operated as described above, the operating handle HD will stop at the trip display point and display an incorrect display.

Therefore, if a trip display mechanism is applied to a special circuit breaker in which the return direction switching point is located between the trip display point and the open circuit display point as described above, it is possible to accidentally trip the operating handle HD when locking the circuit breaker. Even if the display is rotated in this direction, the display immediately returns to its normal state, but circuit breakers with special operating force characteristics as described above have the disadvantage that the operating mechanism is complicated and expensive.

[Purpose of invention]

Therefore, the general object of the present invention is to provide a circuit breaker operating device equipped with a locking mechanism that locks the operating handle to the closing operating side of the circuit breaker, which is capable of tripping when the circuit breaker is tripped during locking. To provide a circuit breaker operating device that can accurately display information, has a simple configuration, and can be applied to general circuit breakers having normal operating force characteristics.

[Means to achieve the purpose]

In order to achieve this purpose, in this invention,
An operating handle that is rotatably operated; the shaft of the operating handle is rotatably supported, and the surface indicates that the circuit breaker is in the open, tripped, and closed states depending on the rotational position of the operating handle. a board having a display section for display; a locking device that limits the rotation range of the operation handle to a range between a closed circuit state display point and a trip state display point when the lock is locked; An operating lever having a protruding lever pin at an end thereof and rotating together with the operating handle; a spring member biasing the operating lever toward a closed circuit state display point; a base mounted on the board at a predetermined interval; a drive lever having one end pivotally attached to the base and the other end having an engagement hole into which the lever pin is inserted; a gripping member fixed to the drive lever and gripping the operating portion of the circuit breaker; ; the size of the engagement hole of the drive lever is such that when the drive lever is in the closed state position of the circuit breaker, the lever pin inserted into the engagement hole is in the closed state of the display section; It is characterized by having a size that allows it to move freely between the display point and the trip state display point.

[Example of idea]

Next, embodiments of the circuit breaker operating device according to the present invention will be described in detail below with reference to the accompanying drawings.

In FIGS. 5 to 7, reference numeral 10 indicates an operating handle, and a shaft portion 10a of the operating handle 10 is rotatably fitted into a through hole 14 formed in a base plate 12. A disk-shaped operating lever 16 is integrally fixed to the shaft end surface. Furthermore, a display plate 18 is attached to the board 12, which indicates whether the circuit breaker is in an open state, a trip state, or a closed state, depending on the pointing point at the tip of the operating handle 10. Further, the operating handle 10 is equipped with a locking device 20, and when the operating handle 10 is locked on the closing operation side of the circuit breaker, the locking pin 20a of the locking device 20 is pushed in against the spring 20c with a screwdriver or the like.
When the protrusion 20b is rotated half a turn to lock the protrusion 20b to the step on the distal end side of the locking mechanism 20, the distal end of the lock pin 20a comes into contact with the fan-shaped locking hole 2 formed in the base plate 12.
2 to prevent the operating handle 10 from rotating to the open circuit display point (however, since the locking hole 22 is fan-shaped, the range from the closed circuit display point to the trip state display point is (It is rotatable.)
Configure it to do so.

A lever pin 24 is provided protruding from the end of the operating lever 16, and a hole 26 is provided in the operating lever 16 adjacent to the base of the lever pin 24, and a protrusion 28 is provided protruding from the end of the base plate 12. A spring member 30 is stretched over the circuit breaker, and when the circuit breaker is in the closed state, a holding force is applied to the operating lever 16 in the direction of closing the circuit breaker, so that the operating handle 10 always points toward the closed state display point. .

A base 34 having four protrusions 32 for connecting a circuit breaker is attached to the board 12 with a spacer tube 36 interposed therebetween so that a space is formed between the base 34 and the base 12. 34 is provided with an arcuate relief hole 38 through which the lever pin 24 is inserted and through which the lever pin 24 can freely move.

A flat drive lever 40 is rotatably attached to the base 34 via a support pin 42, and the drive lever 40 is provided with an engagement hole 44 that engages with the tip of the lever pin 24. The distal end of the lever pin 24 is inserted into the engagement hole 44 to form an engagement portion. The size of the engagement hole 44 is determined by the display nameplate 1.
The lever pin 24 moves into the engagement hole 4 by the stroke between the closed circuit state display point 8 and the trip state display point 8.
4 (see Figure 7).

Further, a channel-shaped gripping member 46 is integrally fixed to the drive lever 40, so that when the base 34 is attached to the circuit breaker, the gripping member 46 grips the operation part (not shown) on the circuit breaker side. It is configured to be gripped (see Figure 8).

Next, the operation of the device of the present invention constructed as described above will be explained. First, when the locking device 20 is not locked, the lock pin 2 of the locking device 20 is
0a is not inserted into the locking hole 22 of the board 12, the operating handle 10 can freely perform circuit opening and closing operations.
Due to the rotation of
The gripping member 46 provided on the drive lever 40 drives the operation part (not shown) of the circuit breaker to open or close the circuit breaker.

Further, when the operating handle 10 is rotated to the closing display point to close the circuit breaker and the locking device 20 is locked in this state, the locking pin 20a (not shown) of the locking device 20 locks the circuit breaker 12. It is inserted into the opening 22 and the operation handle 10 is prevented from rotating to the open state display point. In this case, since the locking hole 22 is formed in a fan shape, the operating handle 1
0 can be rotated in the range from the closed circuit state display point to the trip state display point, but when the operating force applied to the operating handle 10 is stopped, the holding force in the closing direction is applied to the operating lever by the spring member 30. , the operating handle 10 is held at the closed circuit state display point.

In the above state, if the operation handle 10 is accidentally rotated to the trip state display point, if the engagement hole 44 of the drive lever 40 is not set to the above-mentioned size and the lever pin 24 is inserted. When the operating force of the lever pin 24 is transmitted to the drive lever 40 via the grip member 46, the operation part of the circuit breaker is set to the trip position (see FIG. 2). Driven. and,
As mentioned above, in a general circuit breaker, the switching point of the return direction of the operating force is between the closing position and the trip position. It resists the tension and stops at the trip status display point, resulting in an erroneous display. On the other hand, in the device of the present invention, the engagement hole 44 of the drive lever 40 is designed such that the operating force will not be transmitted to the link member 40 even if the operating handle 10 is accidentally rotated to the trip state display point during locking. Since the size is set, even in the case of an erroneous operation as described above, the operating handle 10 immediately returns to the closed circuit state display point due to the tension of the spring member 30, and a correct display can be performed.

In addition, if the circuit breaker is tripped due to overcurrent when the lock is locked, the operation part of the circuit breaker moves to the trip position (see Figure 2), so the gripping member 4
6, the drive lever 40 is rotated in the trip direction. This acting force is transmitted to the operation lever 16 through the engagement portion between the engagement hole 44 and the lever pin 24, and the operation handle 10 is rotated to the trip state display point against the tension of the spring member 30. An indication that the circuit breaker is tripped will be displayed.

[Effect of idea]

According to the device of the present invention, when the circuit breaker is tripped when the circuit breaker is locked while the circuit is closed, it is possible to accurately display a trip, and the device is simple in configuration and can be used in general circuits with normal operating force characteristics. It can be applied to circuit breakers and has an extremely large effect in improving performance and reducing equipment costs.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the configuration of a conventional circuit breaker operating device, FIG. 2 is a partially cutaway side view of the device shown in FIG. 1, and FIG. 3 is a rear view of the device shown in FIG. FIG. 4 is an explanatory diagram showing the relationship between the position of the operating handle of the device shown in FIG. 1 and the switching point of the return direction of the circuit breaker, and FIG. 5 shows the configuration of the circuit breaker operating device according to the present invention. 6 is an exploded perspective view of the inventive device shown in FIG. 5, FIG. 7 is a rear view of the inventive device shown in FIG. 5, and FIG. 8 is a partially cutaway side view of the inventive device. be. 10... Operating handle, 12... Board, 14... Through hole, 16... Operating lever, 18... Display name plate, 2
0... Locking device, 22... Lock hole, 24...
...Lever pin, 26...Small hole, 28...Protrusion,
30...Spring member, 32...Protrusion part, 34...Base, 36...Space tube, 38...Escape hole part, 40...
... Drive lever, 42 ... Support pin, 44 ... Engagement hole, 46 ... Grip member.

Claims (1)

[Scope of utility model registration request] An operating handle that is rotatably operated; the shaft of the operating handle is rotatably supported, and the surface indicates that the circuit breaker is in the open, tripped, and closed states depending on the rotational position of the operating handle. a board having a display section for display; a locking device that limits the rotation range of the operation handle to a range between a closed circuit state display point and a trip state display point when the lock is locked; and a locking device fixed to the shaft end of the operation handle; A lever pin protrudes from the end,
an operating lever that rotates together with the operating handle; a spring member that biases the operating lever toward the closed circuit state display point; a base that is mounted on the board at a predetermined distance; one end is pivoted to the base; a drive lever having an engagement hole at the other end into which the lever pin is inserted; a gripping member fixed to the drive lever and gripping an operating portion of the circuit breaker; The size of the mating hole portion is determined such that when the drive lever is in the closed state position of the circuit breaker, the lever pin inserted into the engaging hole is between the closed state display point and the trip state display point of the display section. 1. A circuit breaker operating device characterized by having a size that allows movement between the circuit breakers.