JPH02183927A - Opening/closing device - Google Patents

Abstract

PURPOSE:To invariably operate an opening/closing device at a fixed speed and make the structure simple and small-sized by operating an opening/closing cutoff section via a compression toggle spring at the time of the manual operation. CONSTITUTION:For the 'on' action by the manual operation, when a handle 3 is operated and a handle shaft 4 is rotated clockwise, a lever 9 is also rotated in the same direction, and a compression toggle spring 12 is excited. When the lever 9 is further rotated and the balance point with a driving lever 5 is exceeded, the lever 5 is rotated counterclockwise by the releasing force of the spring 12. The rotating force of the lever 5 is transmitted to a main shaft 2 via a link 6 and a lever 7, and an opening/closing cutoff section 1 is turned on. The 'off' operation is performed likewise. Opening/closing operations can be invariably performed at the fixed speed regardless of the speed of the shaft 4.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a switching device used for switching power distribution lines,
In particular, the present invention relates to an opening/closing device that can be operated both manually and automatically, and that is equipped with an operating mechanism that maintains a closed circuit state during automatic operation using a latch holding mechanism.

(Prior art) Conventionally, as this type of switchgear, for example,
As shown in Publication No. 16201, an operating handle is connected via a link mechanism to the opening/closing shaft that opens and closes the opening/closing breaker, and when the switching is done manually, the opening/closing shaft is directly connected to the opening/closing shaft by operating the operating handle. is driven to close the opening/closing section. In addition, a lever is engaged with an operating rod attached to the shaft of the operating handle, and a latch connected to this lever via a pivot is constantly biased to a roller connected to an opening/closing shaft via a link. A latch holding mechanism is configured to press the opening/closing section to maintain the closed state during manual operation as well as during automatic operation.

(Problem to be Solved by the Invention) However, in a switchgear with such a configuration, during the closing operation by manual operation, the opening/closing shaft of the opening/closing section is directly driven by the shaft part integrated with the operating handle, so the operation is difficult. The operating speed of the handle affects the opening/closing speed of the opening/closing section. Therefore, if the operation speed is slow when applying a load, problems such as contact welding may occur due to the repulsive force of the contacts, and there is a drawback that the load application state is unstable. In addition, even during manual operation, the same latch holding mechanism as during automatic operation is used to maintain the closed state of the opening/closing section, so in the unlikely event that the trip coil is energized by an electrical trip command while the circuit is closed due to manual operation. However, in order to prevent the opening/closing section from opening, a new interlock mechanism is required, resulting in a problem that the structure of the device becomes complicated and large.

SUMMARY OF THE INVENTION An object of the present invention is to provide an opening/closing device that can operate an opening/closing section at a constant opening/closing speed regardless of the operating speed of an operating handle, and can be made smaller by simplifying the structure. .

rStructure of the Invention] (Means for Solving the Problems) In order to achieve the objects set forth in item 2, the present invention includes an opening/closing breaker, and a main body connected to the opening/closing breaker and opening/closing the opening/closing breaker by its rotation. a shaft; a handle shaft that rotates when the operating handle is operated; a drive lever that is connected to the main shaft so as to be able to transmit driving force and that has one end rotatably attached to the handle shaft; one end that is connected to the handle shaft; A first lever is integrally attached to the shaft, and a pin is disposed at the other end of the first lever, and a pin is also disposed at the other end of the drive lever, so that the drive lever is connected between these pins. is movably connected to one of the pins by a rod, and further a spring force is applied to the rod according to the movement position of the pin at the other end of the first lever, which swings due to rotation of the handle shaft. A toggle mechanism includes a compression toggle spring that stores or releases energy, a second lever attached to the handle shaft, and the second lever is engaged with the drive lever to rotate the handle shaft. The second lever is provided with an engaging means that engages the drive lever so that the rotation of the handle shaft can be transmitted to the drive lever when a rotation range of a predetermined angle is exceeded, and a latch engagement roller is provided on the second lever, and the second lever is provided with a latch engagement roller. from a trip latch and a trip lever that engage the latch engagement roller when the trip coil is energized and operate to release the engagement and operate the toggle mechanism to interrupt the opening/closing section. a trip latch mechanism, and a rod engaging roller is provided on the second lever, and a plunger rod operated by the excitation of a closing coil is engaged with the rod engaging roller to operate the toggle mechanism and open/close the opening/closing section. The structure includes a charging mechanism for charging.

(Function) In a switchgear with such a configuration, when the operation handle is rotated by a certain angle during manual operation, the compression toggle spring of the toggle mechanism is stored, and then when the balance point of the toggle is exceeded, the compression toggle spring is released. This releasing force causes the drive lever to rotate at a constant speed, causing the opening/closing breaker to open/close. Therefore, the opening/closing section can be opened/closed without depending on the operating speed of the operating handle. Further, even if the handle shaft rotates by a predetermined angle during this manual operation, the second lever does not rotate relative to the drive lever due to the engagement play of the engagement means, and is in a state separated from the trip latch mechanism. Therefore, the trip latch mechanism does not operate, and the closed state during manual operation is maintained by the compression toggle spring force, so that the manually closed state can be maintained even if an electrical tripping command is received.

Furthermore, during automatic closing, the second lever is engaged by the engagement means in a state where the motion can be transmitted to the drive lever, and in this state, the closing coil is energized, and the second lever is operated by the movement of the plunger rod. Then, since the drive lever also operates, the opening/closing breaker section closes the circuit, and at the same time, the compression toggle spring of the toggle mechanism is energized. When the closing operation is completed, the latch engaging roller provided on the second lever is engaged with the trip latch of the trip latch mechanism, and when an electrical tripping command is input in this state, the trip coil is energized and the trip latch is activated. Since the engagement with the latch engagement roller is released by the operation, the drive lever is rotated by the releasing force of the compression toggle spring, and the opening/closing breaker section is brought into an open state. Therefore, opening/closing operation in manual operation and opening operation in automatic operation are possible using only the compression toggle spring.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an example of the configuration of the opening/closing device according to the present invention. As shown in FIG. 1, a frame-shaped main shaft 2 for driving the opening/closing breaker 1 is rotatably attached to the handle shaft 4 of the operating handle 3 by penetrating both sides of one end thereof. Drive lever 5 connects link 6 and lever ~7
The opening/closing breaker 1 can be opened/closed by rotating the drive lever 5. This drive lever 5
A pin 8 is attached between both side surfaces on the other end side, and one end portion of a pair of first levers 9 is attached to the handle shaft 4 existing between both side surfaces on the other end side. A pin 10 is attached to the opposite end of the lever 9. The pins 8 and 10 are connected by a rod 11, and a compression toggle spring 12 is provided to form a toggle mechanism. In this case, rod 11 is connected to pin 1
0, so that it can move freely with respect to the swinging of the first lever 9. Further, a second lever 13 is disposed close to one side of the drive lever 5 and attached to the handle shaft 4, and the drive lever is inserted into the elongated hole 14 provided at the other end of the second lever 13. 5
Insert the pin 15 attached to the corresponding side of the second
The lever 13 is engaged with the drive lever 5. A latch engagement roller 16 is provided on one end side of this second lever 13.
A trip latch 17 that engages with this latch engagement roller 16 is attached to a shaft 18, and this shaft 18
A trip latch mechanism in which a trip lever 19 is attached to the end of the trip lever 19, and the trip lever 19 is rotated by a plunger rod 21 operated by excitation of a trip coil 20 to release the engagement between the latch engagement roller 16 and the trip latch 17. It consists of In addition, the second lever 13
A rod engaging roller 22 is provided in parallel with the latch engaging roller 16, and the plunger rod 24, which is operated by the excitation of the closing coil 23, is engaged with the rod engaging roller 22 to operate the toggle mechanism. It consists of Note that this loading mechanism and the rod engaging roller 2
A spring 25 is stretched between the second lever 13 and the second support shaft, and provides a biasing force to rotate the second lever 13 clockwise about the handle shaft 4.

Next, the operation of the opening/closing device constructed as described above will be described with reference to FIGS. 1 to 4.

Figure 1 shows the "off" state of the opening/closing breaker 1, and from this state "on" operation by manual operation and "on" operation by automatic operation.
Figure 2 shows a front view of the opening/closing breaker 1 in Figure 1 in the 'off' state, Figure 3 is a diagram of the 'man' state with automatic operation, and Figure 4 is with manual operation. The "on" state diagrams are shown respectively.

First, the automatic "ON" operation from the "OFF" state shown in FIGS. 1 and 2 to FIG. 3 will be explained. In FIGS. 1 and 2, when the closing coil 23 is excited, the plunger rod 24 moves upward and engages with the rod engaging roller 22, and the second lever 13 is shown centered around the handle shaft 4. Rotate counterclockwise. Then, at the same time as this second lever 13 rotates, the drive lever 5 also rotates in the counterclockwise direction as shown in the figure about the handle shaft 4 via the pin 15 that engages with the elongated hole 14 of the second lever 13. do. When the drive lever 5 rotates counterclockwise, the main shaft 2 rotates clockwise in the drawing via the link 6 and the lever 7, and the opening/closing breaker 1 is closed and placed in the "on" state.

Further, at this time, the compression toggle spring 12 is charged with rotation of the drive lever 5 in the counterclockwise direction. At the same time, the second lever 1
Since the latch engaging roller 16 of No. 3 rotates upward of the trip latch 17, when the excitation of the closing coil 23 is released, the latch engaging roller 16 is locked to the trip latch 17, and the automatic operation shown in FIG. becomes “on” state due to
The input operation is completed.

Next, from the “human” state shown in Figure 3, the automatic operation turns the switch off.
Explain the operation. In FIG. 3, trip coil 20
When energized, the upward movement of the plunger rod 21 causes the trip lever 19 to rotate clockwise in the drawing, and the trip latch 17 coaxially therewith also rotates in the same direction. Then, this trip latch air and latch engagement roller 1
6 is released, and the release force of the compression toggle spring 12 causes the drive lever 5 to rotate clockwise in the drawing. The rotational force of the drive lever 5 is transmitted to the main shaft 2 via the link 6 and the lever 7, so the main shaft 2 rotates counterclockwise in the figure to trip the opening/closing section 1, thereby causing the second It will be in the "off" state as shown in the figure.

Next, we will explain the "on" operation by manual operation from the "OFF" state shown in FIG. 2 to FIG. 4. In FIG. The first lever 9 integrated with this also rotates in the same direction to store the compression toggle spring 12.Then, this first lever 9 rotates further, and the first lever 9 engages with the drive lever 5. When the equilibrium point is exceeded, the driving lever 5 rotates counterclockwise in the drawing due to the releasing force of the compression toggle spring 12.

When the rotational force of the drive lever 5 is transmitted to the main shaft 2 via the link 6 and the lever 7, the main shaft 2 rotates clockwise in the figure to close the opening/closing section 1, as shown in FIG. It becomes "on" state by manual operation as shown in the figure. In this case, the engagement state of the second lever 13 with the drive lever 1 is simply that the pin 15 on the drive lever 5 side moves downward in the elongated hole 14 of the second lever 13.
does not rotate.

Next, the operation from the manually operated "ON" state to the manually operated "OFF" state shown in FIG. 4 will be explained. In FIG. 4, when the operating handle 3 is operated to rotate the handle shaft 4 in the counterclockwise direction shown in the figure, the first lever 9 disposed on the opposite side also rotates in the same direction, and the compression toggle spring 12 is loaded. do. Then, when the handle shaft 4 is further rotated and the first lever 9 exceeds the balance point of the drive lever 5, the compression toggle spring 12
The driving lever 5 is rotated clockwise in the drawing by the releasing force. The rotational force of this drive lever 5 is applied to the link 6 and the lever 7.
When the signal is transmitted to the main shaft 2 through the main shaft 2, the main shaft 2 rotates counterclockwise in the figure to trip the opening/closing breaker 1, and enters the "off" state by manual operation as shown in FIG.

As described above, according to this embodiment, the closing or tripping operation of the opening/closing breaker 1 during manual operation is performed by operating the drive lever 5 by the releasing force of the compression toggle spring 12 stored by the rotation of the handle shaft 4, and linking. 6 and lever 7 to the main shaft 2, the opening/closing operation can always be performed at a constant opening/closing speed, regardless of the operating speed of the handle shaft 4. Also,
The compression toggle spring 12 is used to maintain the "to" state by manual operation.
Moreover, since the trip latch mechanism that maintains the closed circuit state during automatic operation is separated by the elongated hole 14 of the second L/bar 13, its operation will not occur even if an electrical trip command is received. is no longer transmitted to the drive lever 5, and there is no need to provide an interlock mechanism as in the prior art. Furthermore, since it is possible to perform the manually operated opening/closing operation and the automatically operated opening/closing operation using only the compression toggle spring 12, it is possible to achieve a simple structure and to downsize the entire device.

Next, other embodiments of the present invention will be described.

In the embodiment described above, the operation at the time of excitation of the closing coil 23 is transmitted to the drive lever 5 of the toggle mechanism during automatic operation, and the second lever 13 that engages with the latch mechanism that maintains the automatic "human" state is manually operated. Sometimes as a structure for separation,
The pin 15 attached to the side surface of the drive lever 5 is inserted into the elongated hole 14 provided in the second lever 13.
Although the drive lever 5 is engaged with the drive lever 5, this engagement means may have a structure as shown in FIG.

That is, as shown in FIG. 5, a ring-shaped convex boss 26 is attached to the portion of the drive lever 5 through which the handle shaft 4 passes, and a ring-shaped convex boss 26 is attached to the portion of the second lever 13 through which the handle shaft 4 passes. For angles, attach a convex boss 27 that fits with the convex boss 26, and each convex boss 26
．． 27 can be engaged.

Here, the operation of the drive lever 5 engaged with the second lever 13 by such engagement means will be explained with reference to FIGS. 6 to 8. FIG. 6 shows the "off" state, which is the same state as in FIG. 3, and FIG. 7 shows the automatic operation in the "on" state.

When the second lever 13 rotates in the counterclockwise direction shown in the figure from the "off" state shown in FIG.
rotates in the same direction and engages with the convex boss 26 on the drive lever 5 side. Therefore, the drive lever 5 also rotates in the same direction,
The state becomes "human" through automatic operation as shown in FIG.

Further, FIG. 8 shows the "human" state due to manual operation, and at this time, the convex boss 26 on the drive lever 12 side is the "human" state shown in FIG.
Therefore, in this state, only the convex boss 26 on the side of the drive lever 5 can rotate together with the drive lever 5 in the same direction, so that during manual operation is the second part that engages with the drive lever 5 side and the latch mechanism.
It is separated from the lever 13 side, and functions exactly the same as the relationship between the elongated hole 14 and the pin 15 described in the previous embodiment.

[Effects of the Invention] As described above, according to the present invention, a constant opening/closing speed is always transmitted to the opening/closing section by the compression toggle spring during manual operation, so the operation is stable regardless of the speed of the handle operation. In addition, the trip latch mechanism is disconnected from the second lever 13 during automatic operation, and the interlock mechanism is not used to maintain the "on" state by manual operation. There is no need to provide one. Furthermore, since the compression toggle spring alone can be used not only for opening and closing by manual operation but also as a closing spring during automatic operation, it is possible to provide an opening/closing device that has a simple structure and can reduce the size of the entire device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the opening/closing operation mechanism showing an embodiment of the opening/closing device according to the present invention, and FIGS.
FIG. 5 is a perspective view for explaining the structure of the engaging means in another embodiment of the present invention, and FIGS. 6 to 8 are for explaining the operation in the same embodiment. It is a diagram showing "on" and "off" states by manual and automatic operation. 1... Opening/closing breaker part, 2... Main shaft, 3...
Operation handle, 4... Handle shaft, 5... Drive lever 6... Link, 7... Lever 8,10
...Pin, 9...First lever 11...Rod, 12...Compression toggle spring, 13...Second lever 14...Elongated hole, 15...Pin, 16...・Latch engagement roller, 17... Tripura Sochi, 18...
- Shaft, 19... Trip lever 20... Trip coil, 21... Plunger rod, 22... Rod engagement roller, 23... Closing coil, 24... Plunger mouth door.

Claims (1)

[Claims] An opening/closing breaker, a main shaft connected to the opening/closing breaker and opening/closing the opening/closing breaker by rotation, a handle shaft that rotates when an operation handle is operated, and a main shaft connected to the main shaft so as to be capable of transmitting driving force. and a drive lever having one end rotatably attached to the handle shaft, a first lever having one end integrally attached to the handle shaft, and a pin at the other end of the first lever. At the same time, a pin is also provided at the other end of the drive lever, and these pins are connected movably relative to one of the pins by a rod. a toggle mechanism including a compression toggle spring that stores or releases spring force depending on the movement position of a pin at the other end of the swinging first lever;
a second lever attached to the handle shaft;
When the second lever is engaged with the drive lever and the rotation of the handle shaft exceeds a rotation range of a predetermined angle, the second lever is engaged with the drive lever so that the rotation of the handle shaft can be transmitted to the drive lever. an engaging means, and the second lever is provided with a latch engaging roller, which engages the latch engaging roller when in the closed state and operates to release the engagement when the trip coil is excited. A trip latch mechanism includes a trip latch and a trip lever that actuate a toggle mechanism to shut off the opening/closing section, and the second lever is provided with a rod engaging roller, and the plunger rod, which is operated by the excitation of the closing coil, is connected to the rod. An opening/closing device comprising a closing mechanism that engages an engagement roller to operate the toggle mechanism to close the opening/closing section.