JPS6345716Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a catch mechanism for a switch having a trip mechanism.

In switches with a trip mechanism, the operating angle of the main shaft that drives the movable contact varies depending on the switch model, so when using catch mechanisms of the same design, there is a degree of freedom in setting the operating angle of the main shaft. There is a problem that there is not much left. Also,
Conventional switches have had the problem that the connection between the catch mechanism and the main shaft is complicated, making assembly work difficult.

The object of the present invention is to solve these conventional problems and provide a catch mechanism that allows freedom in setting the operating angle of the main shaft and is easy to assemble.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings. Figures 1 and 2 show the catch mechanism when the movable contact is in the on state, and a catch support shaft 2 is horizontally mounted on a catch frame 1 with a U-shaped cross section that is fixed inside the case of the switch. A first catch shaft 2A and a second catch shaft 2B are rotatably fitted through and loosely fitted to the catch support shaft 2.
The catch shaft 2A has an operating lever 4 and a cam 1 for rotating the main shaft 3 that drives the movable contact to open and close.
3 is fixed. Also, the second catch shaft 2
A catch base plate 5 is fixed to B, and rotatably supported by a catch support shaft 2. A first arm 6 and a second arm 7 are rotatably attached to the catch board 5 by shafts 8 and 9, respectively, and the first arm 6 is rotated counterclockwise in the drawing by a spring 6A. The second arms 7 are urged counterclockwise by springs 7A, and the roller 10 attached to the base end of the first arm 6 is locked to the locking part 11 at the base end of the second arm 7. The roller 12 attached to the tip of the first arm 6 is configured to be locked to a locking portion of a cam 13 fixed to the first catch shaft 2A. Further, a tripping electromagnet 14 is fixed to the catch frame 1, and the base end of a tripping plate 17, which is pivoted to the catch frame 1 side by a shaft 16 halfway, is connected to the tip of the movable core 15. ing. A roller 18 attached to the tip of this tripping plate 17
is opposed to the tip of the second arm 7,
Further, the tripping plate 17 is normally urged clockwise by a spring 19. A latch piece 20 is further pivoted to the shaft 16 and biased clockwise by a spring 21, and a roller 22 attached to the tip thereof is engaged with a locking part formed on the catch base plate 5. At the same time, the catch base plate 5 is prevented from rotating clockwise. Catch board 5
A movable iron core 24 of a charging electromagnet 23 that rotates the charging electromagnet 23 counterclockwise is connected to a connecting arm 25 whose base end moves within a long hole provided in a catch board 5, and the catch board 5 is always maintained by a reset spring 26. is biased clockwise. The operating lever 4 and the driving lever 27 fixed to the main shaft 3 are connected by a connecting rod 28. Catch board 5
When the main shaft 3 is rotated with the manual handle 31 and the contactor is inserted, the catch base plate 5 is rotated via the connecting rod 28, so the long hole allows the engagement between the catch base plate 5 and the connecting arm 25. It is designed to have some play.

Now, when the tripping electromagnet 14 is energized and the movable iron core 15 is attracted when the movable contact is in the on state shown in FIG.
rotates counterclockwise against the urging force of the spring 19, and the roller 18 at the tip of the tripping plate 17 pushes the tip of the second arm 7, causing the second arm 7 to rotate clockwise. make it move. Then, the engagement state between the locking part 11 at the base end of the second arm 7 and the base end roller 10 of the first arm 6 is released, and the first arm 6 is cut off as shown in FIG. The roller 12 is pushed by the cam 13 due to the urging force of the spring 29,
It rotates clockwise against the biasing force of the reset spring 6A, and the roller 12 at the tip of the cam 1
Remove from the locking part 3. Therefore, the first and second catch shafts 2A and 2B are released from the restraint between the locking portion of the cam 13 and the roller 12, and are rotated clockwise by the stored force of the cutoff spring 29, so that the first catch shaft By rotating the operating lever 4 attached to the shaft 2A, the main shaft 3 is operated in the direction of opening the movable contact. At the same time as this tripping operation, the tip of the first arm 6 pushes the roller 22 of the latch piece 20, and the roller 22 and the catch board 5
Since the catch base plate 5 is disengaged from the locking portion, the catch base plate 5 is rotated clockwise about the catch support shaft 2 by the restoring force of the reset spring 26. Since its rotation angle is set equal to the rotation angle of the catch shaft 2 during the trip operation, the tip roller 12 of the first arm 6 engages with the locking portion of the cam 13, as shown in FIG. As a result, the first arm 6 rotates counterclockwise about the shaft 8, and therefore the first arm 6 rotates counterclockwise about the shaft 8.
The roller 10 at the base end of the arm 6 is engaged with the locking portion 11 of the second arm 7. This is the OFF state of the switch. Therefore, if the tripping electromagnet 14 is energized, the tripping plate 17→second arm 7→
The first arm 6 → cam 13 → actuation lever 4 → connecting rod 28 → drive lever 27 → main shaft 3, and can be tripped independently of the catch board 5, and can be tripped even when the biasing force of the closing electromagnet 23 is applied. If the electromagnet 14 is energized, it will trip. In addition, if the tripping electromagnet 14 is energized, the closing electromagnet 2
Even if 3 is energized, the contact cannot be inserted.

Next, when closing the movable contact from this disconnected state, by energizing the closing electromagnet 23 and retracting the movable iron core 24, the connecting arm 25 moves to the right and the catch base plate 5 connects to the catch support shaft 2. The cam 13 is pushed by the roller 12 at the tip of the first arm 6, and the actuating lever 4 is rotated counterclockwise. The main shaft 3 rotates to close the movable contact. When loading is completed, the roller 22 at the tip of the latch piece 20 engages with the locking part of the catch board 5, as shown in FIG. 1, and the latch board 5 remains in the state shown in FIG. hold it.

The on/off operation of the switch is performed in this way, but since all such catch mechanisms are installed on the catch frame 1, the catch frame 1 is fixed inside the switch case 30 as shown in FIG. The assembly is completed by simply connecting the operating lever 4 and the connecting rod 28, and connecting the movable core 24 of the charging electromagnet 23 in the case 30 and the connecting arm 25. Also,
Even if the same catch mechanism unit is installed in a switch with a different spindle operating angle, it can be adapted by simply changing the length of the drive lever 27 and connecting rod 28, and conversely, the setting of the spindle operating angle is more flexible. It is something.

As described above, in the present invention, a catch support shaft is attached to the catch frame, and a first catch shaft and a second catch shaft are respectively attached to be rotatable around the catch support shaft. A cam is fixed to an operating lever for rotating a main shaft for operating a movable contact, and a catch board is fixed to the second catch shaft, and the cam and the catch board are fixed to the second catch shaft except during tripping operation. A first arm that engages when the cam is engaged between the first arm and a movable iron core of a tripping electromagnet attached to the catch frame, and an engagement between the first arm and the cam. A trip mechanism is installed to release the switch, and the connecting arm that rotates the catch board from the OFF position of the switch to the ON position is configured so that it can be connected to the movable core of the closing electromagnet. Compared to the conventional catch mechanism, there is more freedom in setting the operating angle of the main shaft, and assembly within the switch case can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the switch closing state in an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a side view showing the state at the moment of operation of the tripping electromagnet.
FIG. 4 is a side view showing the state during the trip operation, FIG. 5 is a side view showing the switch in the off state, and FIG. 6 is an explanatory diagram showing the state in which the switch is installed in the switch case. 1...Catch frame, 2...Catch support shaft, 2
A...First catch shaft, 2B...Second catch shaft, 3...Main shaft, 4...Operating lever, 5...Catch board, 6...First arm, 7...Second arm , 14... tripping electromagnet, 23... closing electromagnet, 25... connecting arm.

Claims (1)

[Scope of utility model registration request] A catch support shaft is attached to the catch frame, and a first catch shaft and a second catch shaft are attached rotatably around the catch support shaft, and a main shaft for operating a movable contact is rotated on the first catch shaft. A cam is fixed to an actuating lever for moving the catch, a catch board is fixed to the second catch shaft, and a first drive lever that engages the cam and the catch board at times other than the trip operation is fixed to the second catch shaft. a trip mechanism for pivotally mounting an arm and releasing the engagement state between the first arm and the cam between the first arm and a movable core of a tripping electromagnet attached to the catch frame; A catch mechanism for a switch, characterized in that a connecting arm for rotating a catch board from an off state position of the switch to an on state position can be connected to a movable iron core of a closing electromagnet. .