JP3441837B2 - Switchgear operation mechanism - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating mechanism of an opening / closing device for opening / closing an opening / closing device such as a circuit breaker or a switch.

[0002]

2. Description of the Related Art FIGS. 16 to 18 are side sectional views showing an example of a conventional operating mechanism.
It is similar to that disclosed in Japanese Patent No. 30. Figure 16 shows how open state a and the closing spring is loaded state of the switchgear, FIG. 17 shows a state where the switchgear was closed state operating bias release is closing spring, Figure 18 is in the opening operation Each state is shown.

In the drawing, 1 is a fixed contactor, 2 is a movable contactor for contacting with and separating from the fixed contactor 1 to open and close an electric path, 3 is a pole shaft, and a pole lever 4 and a drive lever 5 are arranged at predetermined intervals on the axis thereof. Placed and fixed. Reference numeral 6 denotes an insulating rod that rotatably connects the pole lever 4 and the movable contact 2 to each other and transmits the opening / closing operation force from the pole shaft 3 to the movable contact 2, and 7 denotes one end of the pole lever 4. An open spring which is arranged between a portion and a frame (not shown) and urges the pole shaft 3 clockwise. One end of the open spring 8 is attached to the drive lever 5 through a pin 9 and the other. A main link having a roller 10 axially held via a pin 11 at an end thereof, a reference numeral 12 denotes a closing cam mounted on a crankshaft 13 and having an outer edge portion thereof in contact with the roller 10, and a reference numeral 14 denotes a fixed shaft 15 axially mounted on the fixing cam. Tripping cam, 16
Is a connecting link whose one end is axially attached to the trip cam 14 via a pin 17 and the other end is axially attached to the main link 8 via a pin 11, and 18 is attached to the trip cam 14 via a pin 19. The roller 20 is attached to the fixed shaft 21, and the latch 20 is engaged and disengaged with the roller 18 at one end thereof.
2 is attached to a fixed shaft 23, and one end thereof is the latch 20.
The trigger 24 is an electromagnet for a trip command, and its drive shaft 24a is provided so as to be engaged with one end of the trigger 22. Reference numeral 25 is a closing spring, one end of which is pivotally attached to a pin 12a fixed to the closing cam 12 in a rotatable manner.
The other end is rotatably attached to a frame (not shown) by a pin 26 to apply a biasing force to the closing cam. 27 is a closing latch, which is a latch roller 12b provided on the closing cam 12.
The pin 28 is rotatably attached to a frame (not shown) at a position where the pin 28 engages with and disengages from the frame.

Next, the operation of the above apparatus will be described.
FIG. 16 shows the closing spring energy storage state in the open circuit state. In FIG. 16 , when the closing command is output, the closing drive device (not shown) drives the crankshaft 13 and the closing cam 12 attached thereto in the counterclockwise direction. This insertion cam 1
With the rotation of 2, the roller 10 provided in contact with the outer edge portion of the closing cam 12 is driven in the direction away from the crankshaft 13, but the roller 10 is connected to the trip cam 14 via a connection link 16. Therefore, an arc motion is performed counterclockwise around the pin 17. Therefore, the driving force is transmitted to the pole shaft 3 via the main link 8 connected to the roller 10 and the drive lever 5, and the pole shaft 3 is rotated counterclockwise. This pole shaft 3
With the rotation of the pole counterclockwise, the movable contactor 2 is driven to the fixed contactor 1 side via the pole lever 4 fixed to the pole shaft 3 and the insulating rod 6 connected to the pole lever 4. The contacts 1 and 2 are closed. Along with this series of operations, the opening spring 7 attached to one end of the pole lever 4 is charged. FIG. 17 shows a state in which this closing operation is completed.

When an open command is given in FIG. 17 ,
The electromagnet 24 is excited and the drive shaft 24a is attracted upward. As a result, the trigger 22 provided in engagement with the drive shaft 24a is driven in the clockwise direction, and the engagement with the latch 20 is released. Latch 20 is engagement with the rollers 18 17
Since it is above the fixed shaft 21 at, the opening spring 7
Is constantly urged in the counterclockwise direction by a force caused by the force, and when the engagement with the trigger 22 is released, it is rotated in the counterclockwise direction, and the engagement with the roller 18 provided on the trip cam 14 is released. . By the way, since the pole shaft 3 is biased in the clockwise direction by the release spring 7, the roller 10 connected to the pole shaft 3 via the main link 8 is connected.
Is subjected to a rightward force in FIG. 17 due to the relative positional relationship between the pole shaft 3 and the closing cam 12. Therefore, the main roller 10 is connected via the connecting link 16.
The trip cam 14 connected to is constantly receiving counterclockwise rotational force when the circuit is closed, and rotates counterclockwise when the latch 20 is disengaged as described above. The tripping connecting portion or pin 17 of the connecting link 16 by the rotation of the cam 14 is rotated to the right in FIG. 17. As a result, the restraining force that restrains the main roller 10 at the position shown in FIG. 17 disappears, and the main roller 10 moves to the right.
Therefore, the pole shaft 3 connected to the main roller 10 via the main link 8 rotates clockwise, and as the pole shaft 3 rotates, it connects to the pole shaft 3 via the pole lever 4 and the insulating rod 6. The movable contactor 2 thus driven is driven in the opening direction. This state is shown in FIG. 18. By respective urging means (not shown) Then, the trip reset to the state shown in cam 14 and the latch 20 is rotated clockwise, respectively Figure 16.

[0006]

As described above, in the conventional operating mechanism of the opening / closing device, the closing mechanism is configured to perform the closing operation or the opening operation by temporarily holding the closing spring in the stored state. Therefore, it is possible to realize the first operation mode in which the closed spring state and the open state are maintained while the closing spring is stored in the energized state. However, it is not possible to realize the second operation mode in which the closing spring is not held in the energized state and is held only in the closed state and the opened state.

In order to correspond to the second operation mode in the conventional operating mechanism of the opening / closing device as described above, it is necessary to change many of the main parts and also add parts. As described above, in the conventional operating mechanism of the switchgear, the mechanism and the parts cannot be shared between the two types of operating mechanisms corresponding to the first and second operating modes, and the operating mode can be changed according to the operating mode. Since the assembly work of the operating mechanism must be changed, the price of the operating mechanism of the switchgear is reduced due to an increase in the number of parts including replacement parts, complicated parts management, and complicated assembly work. could not.

Therefore, the object of the present invention is to solve the above-mentioned problems, and it is possible to easily cope with both the first operation mode and the second operation mode, and to operate the operation. It is an object of the present invention to provide an operating mechanism for a switchgear that has a common mechanism, has a small number of parts, and can easily change the operating mode even after assembly of the operating mechanism.

[0009]

According to a first aspect of the present invention, there is provided an operating mechanism for an opening / closing device, wherein a closing cam and an energy storage cam rotatably mounted on a drive shaft and a rotatably mounted drive shaft. The trip lever operates to come into contact with and separate from the closing cam, the closing spring whose one end is fixed to the closing cam and the other end is fixed to the energy storing cam, and the closing spring The energizing latch that holds the energized state, the closing latch that causes the closing cam to rotate by the closing spring by releasing the engagement with the closing cam, and the closing spring that releases the engagement with the trip lever. And a trip latch for rotating the trip lever by means of a rotary lever, which is rotatably connected to one end of the trip lever, and which is driven by the rotation operation of the closing cam to rotate the spindle lever that opens and closes the contact of the switch. A moving lever and a blocking means provided on the energy storage latch and abutting against the outer peripheral edge of the closing cam to prevent the holding operation of the energy storage latch for holding the energy storage state of the closing spring. It is what

In the operating mechanism of the opening / closing device according to the second aspect of the present invention, the blocking means is detachably attached to the energy storage latch.

In the operating mechanism of the opening / closing device according to the third aspect of the present invention, the blocking means is formed integrally with the energy storage latch.

In the operating mechanism of the opening / closing device according to claim 4 of the present invention, the blocking means is provided at a predetermined position in the outer peripheral edge direction of the closing cam in accordance with the stored energy to be stored in the closing spring. It will be done.

In the operating mechanism of the opening / closing device according to a fifth aspect of the present invention, the blocking means has a notch portion for receiving the outer peripheral edge of the trip lever.

[0014]

In the operating mechanism of the opening / closing device according to the first aspect, the blocking means blocks the holding operation of the energy storage latch.
The energy of the closing spring is not retained, but returned to the open state and retained.

In the operating mechanism of the opening / closing device according to the second aspect of the invention, since the blocking means is detachable, it is not held in the closing spring energy storage state, but is held in the open state or the closed state. Alternatively, it is possible to easily switch to the operation mode in which the closing spring energy storage state is held and the open circuit state or the closed circuit state is maintained.

In the operating mechanism of the opening / closing device according to the third aspect, the blocking means is integrated with the energy storage latch.

In the operating mechanism of the opening / closing device according to the fourth aspect, the stored energy to be stored in the closing spring is determined by the position of the blocking means.

In the operating mechanism of the opening / closing device according to the fifth aspect, the cutout portion of the blocking means does not contact the outer peripheral edge of the trip lever.

[0019]

EXAMPLES Example 1. [Structure of Embodiment 1] Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. Figure 1
Exploded perspective view illustrating the operating mechanism of the switchgear according to Embodiment 1, FIG. 2 is reset state diagram of a switchgear operating mechanism (switch open), Figure 3 is the closing spring prestressed state diagram, FIG. 4 is turned state diagram (Switch closed circuit), FIG. 5 shows a trip state diagram (switch opened circuit), and FIGS. 6, 7, and 8 show outline views of the energy storage cam, the closing cam, and the trip lever in the reset state of FIG. 2, respectively. It is shown.

In the figure, 29 is a drive shaft that is the center of the operating mechanism, 29a is a boss that is rotatably mounted on the drive shaft 29, and 30 is affixed to the boss 29a through a hole 30f. A closing cam 31 that rotates together is a trip lever 31 that is rotatably attached to the boss portion 29a of the drive shaft 29 through a hole 31f. The spring hook pin 30a fixed to the closing cam 30 passes through the trip lever. Oval hole 31a that can be moved by
have. 32 is pin 3 on the trip lever 31
The drive lever rotatably connected to the roller 3
Is rotatably attached by a pin 34a, and the roller 34 is brought into contact with the outer edge portion 30S of the charging cam 30 to roll. Reference numeral 35 denotes a power storage cam that is rotatably attached to the drive shaft 29 and has an operation shaft 36 for operating from the outside fixed to a hole 35f, 37 is a closing spring, and one end is a closing cam 3
It is fixed to the spring hooking pin 30a fixed to 0, and the other end is fixed to the spring hooking pin 35a fixed to the energy storage cam 35. A spring guide 370 guides the closing spring 37 and is rotatably mounted on the boss portion 29a of the drive shaft.

Reference numeral 38 is a closing latch, which is a paragraph 38a.
Is pivotally attached to a frame (not shown) so as to engage and disengage with a notch 30b provided on the outer edge of the closing cam 30. Reference numeral 39 denotes a trip latch, which is pivotally attached to a frame (not shown) such that a paragraph 39a of the trip latch is separated from a notch 31b provided on the outer edge of the trip lever 31. Reference numeral 40 denotes an energy storage latch, and the paragraph 40a thereof is a cutout portion 35b provided on the outer edge of the energy storage cam 35.
It is rotatably attached to a frame (not shown) so as to be engaged with and separated from the frame. These three latches 38, 39, 40
Each of the closing latches 3 is provided by a biasing means (not shown).
8. The trip latch 39 is biased counterclockwise as shown (FIGS. 1 to 8) and the energy storage latch 40 is biased clockwise as shown. A blocking means 47, which will be described in detail later, is also detachably attached to the energy storage latch 40 by a screw 38.

Reference numeral 41 denotes a main shaft lever fixed to a main shaft 42, and a roller 43 is rotatably attached to a tip end of the main shaft 42 by a pin 44. 45 is a reset spring, one end of which is a closing cam 3
No. 0 is attached to the spring hooking pin 30a and the other end is fixed to a frame (not shown), and the closing cam 30 is biased counterclockwise via the spring hooking pin 30a. A stopper 46 is fixed to a frame (not shown) at a position where it abuts the trip lever 31.

In the operating mechanism of the switch according to the present invention, as shown in FIG. 9, the power accumulating latch 40 is detachably provided by a screw 48 and abuts against the outer peripheral edge 30c of the closing cam 30 to store the energy. The latch 40 is provided with a blocking means 47 that blocks the clockwise rotation in FIG. 9 and thus blocks the holding operation of the energy storage latch 40 for maintaining the energy storage state of the closing spring 37. Therefore, when the detachable blocking means 47 is not attached to the energy storage latch 40, as will be described later,
The first operation mode in which the closed spring state and the open circuit state are maintained while the closing spring is stored in the stored state. When the detachable blocking means 47 is attached to the energy storage latch 40,
As will be described later, since the energization state of the closing spring 37 is not held and returned to the open state, the energized spring 37 is not retained in the energized state of the closing spring, but is held only in the open state or the closed state. A second operating mode is obtained.

In the illustrated example, the blocking means 47 is provided with a screw 48 corresponding to a notch or a paragraph 40a formed at a position corresponding to the closing cam 30 and the trip lever 31 of the energy storage latch 40 by a screw 48. Is a member (hook) having an L-shaped cross section attached to the upper surface of the. The L-shaped short leg bends from the flat upper surface of the energy storage latch 40 at a substantially right angle,
An abutting end face 47b is formed at a position slightly above the bottom surface of the paragraph 40a and lowered. In FIG. 10, the contact end surface 47b is in contact with the outer peripheral edge 30c of the closing cam 30, and the biasing spring (not shown) prevents the biasing spring 40 from rotating clockwise in the figure. is doing.

The blocking means 47 is provided with a notch 47a in its abutting end face 47c for receiving the outer peripheral edge 31c of the trip lever 31 so that the blocking means 47 and the trip lever 31 do not come into contact with each other. The depth of the notch 47a is such that the notch 47a is the outer peripheral edge 31c of the trip lever 31.
It has a sufficient depth to prevent the contact with the trip lever 31 and prevents the blocking means 47 from being damaged by abrasion or bending due to the collision with the trip lever 31.

[First Operation Mode] The first operation mode of the operation mechanism of the switch according to the present invention (the blocking means 47 is not attached to the energy storage latch 40, and the closing spring is held in the energy storage state to close the circuit). The operation in the operation mode for holding the open state and the open state will be described with reference to FIGS. FIG. 2 shows the switch in the open state, the closing spring 37 is in the released state and the entire operating mechanism is in the reset state, and FIG. 3 shows the switch in the open state, the closing spring 37 is in the accumulated state and the trip latch 39 and the trip lever 31. 4 shows the engaged state, FIG. 4 shows the closing latch 38 operating, the switch is closed and the closing spring 37 is partially released, and FIG. 5 shows the trip latch 39 operating and the switch is open and closed. The spring 37 shows a completely released state.

In FIG. 2, the closing cam 30 is urged counterclockwise by a reset spring 45 hooked on a spring hook pin 30a, and the spring hook pin 30a is engaged with the elliptical hole 31a of the trip lever 31. The trip lever 31 is also urged counterclockwise, but the trip lever 3
Since 1 is locked at the position where it abuts on the stopper 46,
The closing cam 30 is also prevented from rotating counterclockwise by the contact between the elliptical hole 31a of the trip lever 31 and the spring hooking pin 30a.

At the biasing position in the counterclockwise direction, the notch 30b of the closing cam 30 and the stepped portion 38a of the closing latch 38 are engaged with each other to lock the clockwise rotation of the closing cam 30.
On the other hand, the energy storage cam 35 includes a spring hook pin 35 a and a closing spring 3.
By engaging with 7, the engaging cam 30 is locked with a fixed positional relationship. Further, the trip latch 39 is held in a state in which the trip latch 39 cannot engage with the cutout portion 31b of the trip lever 31 by the abutting portion 39a of the trip latch 39 against the outer edge portion of the energy storage cam 35. Further, the roller 34 provided on the drive lever 32 is fitted in the concave portion of the outer peripheral edge portion of the closing cam 30, and does not push the roller 43 of the spindle lever 41. Therefore, the movable contact 2 of the switch has an insulating rod. The open state is maintained by the opening spring 7 via 6.

The operating shaft 36 is rotated clockwise from the state shown in FIG. 2 so that the notch portion 35b of the energy storing cam 35 engages with the stepping portion 40a of the energy storing latch 40 as shown in FIG. By turning the closing spring 37 to the matching position, the closing spring 37 stores energy through the spring hooking pin 35a. At this time, since the other end of the closing spring 37 is locked by the spring hooking pin 30a of the closing cam 30, the closing cam 30 applies a clockwise urging force to the closing cam 30. Since 38a is engaged with the cutout portion 30b of the closing cam 30, the clockwise rotation is stopped.

On the other hand, the trip latch 39 rotates counterclockwise to engage with the notch 31b of the trip lever 31 because the step portion 39a of the trip latch 39 fits inside the notch 35b from the outer edge of the energy storage cam 35. The rotation of the trip lever 31 in the clockwise direction is stopped.

When the contacts 1 and 2 of the switch of FIG. 2 are in the open state and the closing spring 37 is in the released state, the energy storage cam 35 releases the engagement of the trip latch 39 and the trip lever 31. The reason why the trip latch 39 and the trip lever 31 are engaged with each other in the process of storing the closing spring 37 is that when the closing latch 38 is not engaged with the closing cam 30 in the reset state of the operating mechanism, it is incorrect. This is because even if the energy storage cam 35 is rotated, the trip lever 31 is set in a free state so that the contact opening / closing work is not performed (interlock function).

Next, when the closing latch 38 is rotated in the clockwise direction from the stored state of the closing spring 37 shown in FIG. 3, the closing portion 38a of the closing latch 38 and the notch portion 30b of the closing cam 30 are rotated.
Is disengaged, and the closing cam 30 is rotated clockwise by the energy stored in the closing spring 37 via the spring hooking pin 30a. Then, the roller 34 of the drive lever 32 fitted in the outer edge recess of the closing cam 30 is pushed out by the outer edge portion 30S of the closing cam 30 and moved in the direction in which the roller 34 moves away from the drive shaft 29.

At this time, one end of the drive lever 32 is pivotally attached to the trip lever 31 by the pin 33, and the trip lever 31 is locked in the clockwise rotation by the trip latch 39. Three
3 is rotated counterclockwise about the rotation center to rotate the spindle lever 4
1. Push down the roller 43 provided on the main spindle lever 4
By rotating 1 in the clockwise direction and rotating the main shaft 42 in the same direction, the movable contact 2 is rotated in the clockwise direction via the insulating rod 6, and the switch is closed as shown in FIG. . The rotation amount of the closing cam 30 in this case is locked at the position where the spring hooking pin 30a contacts the other end of the oval hole 31a of the trip lever 31, and the rotation amount of the closing spring 37 previously stored. The closing operation of the switch is completed when the number is small.

When the drive lever 32 is rotated counterclockwise and the outer edge portion 30S of the closing cam 30 and the roller 34 of the drive lever 32 are in contact with each other, the drive lever 3 is closed.
The second curved surface portion 32 a forms a concentric circle centered on the drive shaft 29 and is in contact with the roller 43 of the main shaft lever 41. For this reason, the drive lever 32 is driven from the load side opening force applied to the main shaft lever 41 from the open spring 7 and the fixed contact 1 and the movable contact 2 provided on the main shaft 42 via the main shaft 42.
A stable closed circuit state can be formed without generating a component force for rotating the.

Next, from the state shown in FIG.
When is rotated in the clockwise direction, the engagement between the stepped portion 39a of the trip latch 39 and the cutout portion 31b of the trip lever 31 is disengaged, and the trip lever 31 engages with the closing cam 30 and the spring hook pin 30a engaged with the closing spring 37. Through spring 3
The remaining stored energy of 7 rotates clockwise, and the drive lever 32 also moves the outer edge portion 30 of the closing cam 30 via the pin 33.
It rotates clockwise around the drive shaft 29 along S.

As a result, as shown in FIG.
Since the curved surface portion 32a of 2 and the roller 43 of the spindle lever 41 are disengaged from each other and the support of the spindle lever 41 is lost, the spindle 42 is rotated counterclockwise by the opening force of the opening spring 7 and the movable contact 2 is moved. Open the open / close switch.

When the trip lever 31 rotates in the clockwise direction, the trip lever 31 comes into contact with the step portion 40a of the energy storage latch 40 at its outer edge, and rotates the energy storage latch 40 counterclockwise to store the energy. The engagement of the bias cam 35 with the notch 35b is released.
As a result, the closing cam 30, the trip lever 31,
The energy storage cam 35 is rotated counterclockwise by the reset spring 45 in a state where a constant positional relationship is maintained by the closing spring 37 and the spring hooking pins 30a, 35a.
It returns to the reset position shown in FIG.

[Second Operation Mode] Next, a second operation mode of the operating mechanism of the switch according to the present invention will be described. The operation in the operation mode for holding the open state and the open state will be described with reference to FIGS. 9 to 14.

When the blocking means 47 is attached to the energy storage latch 40 as shown in FIG. 9, the energy accumulation cam 35 further rotates beyond the energy accumulation completion position in FIG. When it is advanced, the cutout portion 35b of the energy storage cam 35 is closed by the energy storage latch
It rotates clockwise beyond the paragraph 40a. In the first operation mode, the energy storage latch 40, which is biased in the clockwise direction due to the absence of the blocking means 47, falls into the cutout portion 35b of the energy storage cam 35, where the energy storage operation is stopped and the closing spring is closed. The stored state of 37 is held.

However, in the second operation mode, since the blocking means 47 is attached to the energy storage latch 40, the cutout portion 35b of the energy accumulation cam 35 crosses the stepped portion 40a of the energy accumulation latch 40. Even if it is rotated clockwise in this way, the contact end surface 47b of the blocking means 47 contacts the outer peripheral edge 30c of the closing cam 30 and the clockwise rotation of the energy storage latch 40 is blocked.
Therefore, even if the energy storage cam 35 continues to rotate in the clockwise direction beyond the energy storage completion position to continue the energy storage operation, or even if the energy storage operation is stopped midway, the closing spring 37 is closed unless the closing operation is performed. The stored state of the current is not held but returned to the open state, and is held in the original reset state, that is, the open state.

In FIG. 11, the energy storing cam 35 rotates clockwise when the energy storing operation is further advanced, so that it engages with the notch 30b of the closing cam 30 to stop the clockwise rotation. The cam slope 35d of the energy storage cam 35 approaches the closing latch 38, and eventually the paragraph 38a of the closing latch 38 is pushed up to resist the spring biasing force to rotate counterclockwise. Rotate 38 clockwise. Then, the notch 3 of the closing latch 38 and the closing cam 30.
The engagement with 0b is released, and the closing cam 30 rotates clockwise to be in the closing state, that is, the closed state.

When the closing cam 30 further rotates in the clockwise direction and the cutout portion 30c of the closing cam 30 passes the energy storing latch 40, the energy storing latch 40 is rotated in the clockwise direction by the spring biasing force, and the energy storing cam 35 moves. Inner peripheral edge 35 lower than the outer peripheral edge of
abut on c. Therefore, even if the clockwise rotation of the energy storage cam 35 is stopped, the stepped portion 40a of the energy storage latch 40 and the cutout portion 35b of the energy storage cam 35 are engaged with each other to maintain the closed state, that is, the closed state. can do.

Subsequent operations such as tripping and resetting are similar to those in the case of the first operation mode which does not use the blocking means 47 described above.

As is apparent from FIG. 10 and the above description, depending on the dimension L of the contact end surface 47a of the blocking means 47, that is, the thickness dimension or the position of the closing cam 30 in the outer peripheral edge direction, the closing spring energy storage completion position. Is determined, and the energy stored in the closing spring 37 is determined. This is because when the thickness dimension L of the abutting end face 47a of the blocking means 47 is increased, the energy is accumulated by the time the engaging portion 40a of the energy accumulating latch 40 and the cutout portion 35b of the energy accumulating cam 35 are engaged. This is because the angle at which the cam 35 rotates increases, and the spring energy stored in the closing spring 37 increases in proportion to this. Therefore, the energy stored in the closing spring 37 can be appropriately changed according to the size of the load by appropriately selecting the position of the closing means 47 in the direction of the outer peripheral edge of the closing cam 47, that is, the dimension L. The range that can be shared is expanded and labor is saved.

As is clear from the above description, since the blocking means blocks the holding operation of the energy storage latch, the energy of the closing spring is not retained and is returned to the open state and is retained. It is possible to obtain an operation mode in which it is held only in the open state or the closed state without being held by. Further, since this blocking means is detachably attached to the energy storage latch, it is also possible to use the first operation mode in which the closing spring and the open state are maintained in the closing spring energy storage state. It is possible to easily switch to the second operation mode in which the closing spring is not held in the energized state and is held only in the closed state and the open state, and the operation mechanism can be shared. Further, since the blocking means has the notch for receiving the outer peripheral edge of the trip lever and does not contact the outer peripheral edge of the trip lever, the removable blocking means is not damaged.
Further, since the blocking means is provided at a predetermined position in the outer peripheral edge direction of the closing cam in accordance with the stored energy to be stored in the closing spring, the closing cam outer peripheral edge direction position of the blocking means is appropriately selected. As a result, the energy stored in the closing spring can be changed according to the size of the load, the range in which the operating mechanism can be shared is expanded, and labor is saved.

Example 2. In FIG. 15, the abutment means is an integral part of the energizing latch, and the energizing spring is not retained in the energizing spring energizing state but is retained only in the closed state and the open state. The latch 50 is shown. Since the energizing latch 40 for the first operation mode, which holds the closed spring state and the open state respectively while holding the closing spring in the energized state, is prepared separately, and is replaced and used as necessary. is there. With this configuration, the number of parts as the abutment means is reduced, and two types of energy storage latches 4 are provided when the operating mechanism of the opening / closing device is assembled.
All you have to do is select 0 or 50 and assemble.
The assembly time of the switch operating mechanism is shortened, the price is low, and the operating mechanism is highly reliable.

[0047]

According to the operating mechanism of the opening / closing device according to the first aspect of the present invention, the closing cam and the accumulating cam rotatably mounted on the drive shaft, and the rotatably mounted on the drive shaft, A trip lever that can move toward and away from the closing cam, a closing spring whose one end is fixed to the closing cam and the other end is fixed to the energy storage cam, and the energy of the closing spring is stored by engaging the energy storage cam. The energizing latch that holds the state, the closing latch that causes the closing cam to rotate by the closing spring by releasing the engagement with the closing cam, and the trip by the closing spring that releases the engagement with the trip lever A trip latch that rotates the lever and a drive lever that is rotatably connected to one end of the trip lever and that rotates the spindle lever that is driven by the rotation operation of the closing cam to open and close the contacts of the switch. , A closing means provided on the energy storage latch and abutting against the outer peripheral edge of the closing cam to prevent the holding operation of the energy storage latch for holding the energy storage state of the closing spring. A second operation mode is obtained in which the open state or the closed state is maintained without holding the energized state.

According to the operating mechanism of the opening / closing device of the present invention, the abutment means is detachably attached to the energy storage latch, so that the abutment means can be attached and detached as necessary to make the closing spring. The first operation mode in which the closed state and the open state are held in the energy-accumulated state, and the second operation mode in which the closed spring is not retained in the energized spring energy state and is held only in the closed state and the open state It is possible to easily switch between the operation modes of and, and the operation mechanism can be shared.

According to the operating mechanism of the opening / closing device of the third aspect, since the abutting means is formed integrally with the energy storage latch, the number of parts can be reduced, the assembling time can be shortened, and the operating mechanism price can be reduced. Can be cheaper.

According to the operating mechanism of the opening / closing device of the fourth aspect, the contact means is provided at a predetermined position in the outer peripheral edge direction of the closing cam in accordance with the stored energy to be stored in the closing spring. Therefore, the energy stored in the closing spring can be changed according to the size of the load by appropriately selecting the position of the abutment means in the direction of the outer peripheral edge of the closing cam. Become

According to the operating mechanism of the opening / closing device of the fifth aspect, the abutting means has a notch for receiving the outer peripheral edge of the trip lever, so that the notch of the abutting means is provided at the outer peripheral edge of the trip lever. Does not come into contact with the accumulator latch, so that the detachable abutment means is not damaged.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an operating mechanism of a switchgear according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing a reset state (switch open circuit) of the operating mechanism in the first operating mode of the switchgear according to Embodiment 1 of the present invention.

FIG. 3 is a diagram illustrating a closing spring energy storage state in a first operation mode of the operation mechanism of the switchgear according to the first embodiment.

FIG. 4 is a diagram showing a closed state (switch closed circuit) in the first operation mode of the operation mechanism of the switchgear according to the first embodiment.

FIG. 5 is a diagram showing a trip state (switch open circuit) in the first operation mode of the operation mechanism of the switchgear according to the first embodiment.

FIG. 6 is an external view of the energy storage cam in the reset state of FIG.

FIG. 7 is an external view of the closing cam in the reset state of FIG.

8 is an external view of the trip lever in the reset state of FIG.

FIG. 9 is a partial perspective view showing a state (second operation mode) in which a detachable contact means is attached to the energy storage latch.

FIG. 10 is a diagram showing a relationship between a power storage latch and a contact means, a closing cam and a power storage cam in a second operation mode.

FIG. 11 is a diagram showing a relationship among a closing latch, a closing cam, and a charging cam in a second operation mode.

FIG. 12 is an outline view of the energy storage cam in a reset state in the second operation mode.

FIG. 13 is an external view of the closing cam in a reset state in the second operation mode.

FIG. 14 is an outline view of a trip lever in a reset state in a second operation mode.

FIG. 15 is a perspective view showing an integral type energy storage latch according to a second embodiment.

FIG. 16 is a view showing a closing spring energy storage state (switch open circuit) of a conventional switch operating mechanism.

FIG. 17 is a view showing a closed state (switch closed circuit) of a conventional switch operating mechanism.

FIG. 18 is a diagram showing a trip state (during a switch opening operation) of a conventional switch operating mechanism.

[Explanation of symbols]

29 drive shaft, 30 closing cam, 31 trip lever, 32 driving lever, 35 energy storing cam, 36 operation shaft, 37 closing spring, 38 closing latch, 39 trip latch, 40 energy storing latch, 41 spindle lever, 47
Blocking means, 47a abutting end face.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01H 33/40 H01H 3/30

Claims (5)

(57) [Claims] 1. A closing cam and an energy storage cam that are rotatably mounted on a drive shaft, and a trip lever that is rotatably mounted on the driving shaft and that is movable toward and away from the closing cam. A closing spring, one end of which is fixed to the closing cam and the other end of which is fixed to the accumulating cam, an energizing latch that holds the energized state of the closing spring by engaging the accumulating cam, and the closing A closing latch that causes the closing spring to rotate the closing cam by releasing the engagement with the cam, and a trip lever that releases the engagement between the trip lever and the closing lever causes the closing lever to rotate. A trip latch to be operated and one end of the trip lever are rotatably connected, and a drive lever for rotating a spindle lever which is driven by the rotation operation of the closing cam to open and close the contact of the switch. A bar, and a blocking means that is provided on the energy-storing latch and contacts the outer peripheral edge of the closing cam to block the holding operation of the energy-storing latch for holding the energy-storing state of the closing spring. An operating mechanism for a switchgear, which is characterized in that 2. The operating mechanism for a switchgear according to claim 1, wherein the blocking means is detachably attached to the energy storage latch. 3. The operating mechanism for a switchgear according to claim 1, wherein the blocking means is formed integrally with the energy storage latch. 4. The blocking means is provided at a predetermined position in the outer peripheral edge direction of the closing cam in accordance with the stored energy to be stored in the closing spring. Operating mechanism of the opening and closing device. 5. The operating mechanism for an opening / closing device according to claim 2, wherein the blocking means includes a cutout portion that receives an outer peripheral edge of the trip lever.