JPS604348Y2 - switchgear switchgear - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a switching device for a switch.

A switchgear that is equipped with a locking mechanism that locks at a position beyond the dead center to lock the closed state requires a large amount of force to release it when the circuit is opened, so it is difficult to use a switchgear like a trip coil. If the capacity is small, it is impossible to remove it.

An object of the present invention is to provide a switching device for a switch that eliminates such problems.

Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In the drawing, 1 is a case of a switch, and a fixed electrode 5 is fixedly installed on the right side of the case.

Reference numeral 6 denotes a rotation shaft rotatably installed between the front and rear left portions of the case 1, and the upper end of the movable electrode 7, which can be inserted into and removed from the fixed electrode 5, is fixed via a support insulator. .

Reference numeral 8 denotes an interlocking lever whose upper end is fixed to the rotating shaft 6 as shown in FIG. A spring 10 is attached that biases it in the direction (direction).

Reference numeral 11 denotes an actuation shaft rotatably installed between the front and back of the right side of the case 1, and the upper end of the actuation lever 12 is fixed thereto.

Reference numeral 13 denotes a connecting link that connects the lower end of the operating lever 12 and the intermediate portion of the interlocking lever 8.

Therefore, when the operating shaft 11 is rotated counterclockwise,
Since the rotating shaft 6 is rotated counterclockwise via the actuating lever 12, the connecting link 13, and the interlocking lever 8, the movable electrode 7 comes into pinch contact with the fixed electrode 5, resulting in a closed circuit state, and the actuating Conversely, when the shaft 11 is rotated clockwise, the movable electrode 7 separates from the fixed electrode 5, resulting in an open circuit state.

Next, the configuration for opening and closing the movable electrode 7 will be explained with reference to FIGS. 2 to 6. As shown in FIG. As shown in the figure, the movable core 15
is in the left retracted position, and in the excited state projects to the right position as shown in FIG.

Reference numeral 16 denotes a first lever whose lower end is rotatably pivoted to a fixture 17 fixed to the right side of the electromagnetic solenoid 14, and a first connection is established between the intermediate portion thereof and the tip of the movable iron core 15. They are articulated by links 18.

Reference numeral 19 denotes an interlocking lever in the shape of an arrow, which is rotatably attached to the operating shaft 11 at its center, and is connected between its right end and the upper end of the first lever 16 by a second connecting link 20. ing.

Reference numeral 21 denotes a long hole transparently provided at the left end of the interlocking lever 19.

Reference numeral 22 denotes an operating lever whose upper end is rotatably fixed to the operating shaft 11, and a first link 24 connects the lower end of the operating lever to a support shaft 23 slidably attached to the elongated hole 21. It is connected.

A spring 25 is hung between the support shaft 23 and a locking pin 25a above the support shaft 23, and urges the support shaft 23 upward.

Therefore, when the interlocking lever 19 is rotated counterclockwise from the position shown in FIG.
2, the operating shaft 11 is rotated counterclockwise, that is, in the closing direction.

Reference numeral 26 denotes an operating shaft rotatably installed on the left side of the operating shaft 11 in parallel with the operating shaft 11, and the base end of the drive lever 27 is positioned so that its tip is above the support shaft 23. It is fixed as follows.

28 is a third connecting link that connects the tip of the drive lever 27 and the support shaft 23.

Therefore, when the operating shaft 26 rotates clockwise and the drive lever 27 rotates downward, the operating shaft 11 is rotated in the closing direction, and conversely, when the drive lever 27 rotates upward, the operating shaft 11 rotates. It is rotated in the opening direction.

Reference numeral 29 denotes a stopper fixed above the drive lever 27, which restricts the rotational limit of the drive lever 27 when the circuit is in an open state.

As shown in FIG. 6, 30 is a charging handle whose base end is fixed to the shaft end of the operating shaft 26 protruding outside the case 1, and when rotated downward, the operating shaft 26 is rotated clockwise, that is, It can be rotated in the input direction.

A spring 31 is hung between the base end of the input handle 30 and the locking pin 32, and biases the input handle 30 in the opening direction.

A clutch (not shown) is interposed on the operation shaft 26, and after the input handle 30 rotates the operation shaft 26 in the input direction, the handle 30 is returned to its original position by a spring 31, and the operation shaft The rotation of 26 is prevented from being reversely transmitted to the handle 30.

Reference numeral 33 is a substantially triangular release lever whose upper end is rotatably attached to the operating shaft 26, and a recess 33a is formed on the lower side, and the lower end surface on the left side is the lower end surface on the right side with respect to the recess 33a. It is formed in a shape closer to the operating shaft 26.

Reference numeral 34 denotes a second link that connects the lower right side of the release lever 33 with the support shaft 23, and when the left side of the interlocking lever 19 is in the upward movement position, that is, when the circuit is open, the first link 24 As shown in FIG. , A2 are slightly below the dead point XX, and together with the first link 24, it forms a downward mid-fold state.

35 is a stopper fixedly installed below the second link 34, and as shown in FIG. 24 and 34 to prevent downward rotation of both links 24 and 34.

36 is a fixing lever whose base end is rotatably attached to a fixing shaft 37 below the release lever 33, and 38 is a protrusion formed on the tip and side of the fixing lever 36, and a spring 39 which will be described later. Due to the biasing force, the release lever 33 is locked to the lower left side surface of the release lever 33 in the open state shown in FIG. 2, and is fitted into the recess 33a immediately after the opening operation shown in FIG. At this time, it is engaged with the right side edge of the recess 33a.

39 is a spring wound around the fixed shaft 37,
One end is attached to the stopper 35, and the other end is attached to the fixing lever 3.
6 to rotate the fixing lever 36 in the direction of the release lever 33.

Reference numeral 40 denotes a hook whose base end is fixed to the upper corner of the tip of the fixing lever 36.

41 is a fixed shaft 4 on the left side of the release lever 33.
A latch lever having an intermediate portion rotatably pivoted on the 2,
Its lower end forms a latching portion 41a with which a latching claw 40 of the fixing lever 36 is engaged.

43 is a spring wound around the fixed shaft 42,
One end is hooked to a stopper 44, which will be described later, and the other end is hooked to the left side edge of a locking lever 41, thereby urging the locking lever 41 to rotate in the direction of engagement with the locking pawl 40.

Reference numeral 44 denotes a stopper provided on the left side of the latch lever 41 to prevent the latch lever 41 from rotating counterclockwise from a position where it can engage with the latch claw 40.

Reference numeral 45 denotes a trip coil fixed to the left side of the upper part of the latch lever 41. When in the demagnetized state, the movable iron core 46 is in the retracted position to the left, and when in the energized state, the movable iron core 46 also protrudes to the right and is latched. The stop lever 41 is rotated in the direction in which the engagement is released.

Reference numeral 47 denotes a release lever whose upper end is fixed along the locking lever 41 to a shaft 48 rotatably provided above the trip coil 45, and which rotates counterclockwise around the same shaft 48. The fifth
As shown in the figure, the latch lever 41 is rotated in a direction away from the latch claw 40.

A spring 49 is hung between the intermediate portion of the tripping lever 47 and the locking pin 50 on the left thereof, and urges the tripping lever 47 in the clockwise direction.

Reference numeral 51 denotes a stopper that prevents the release lever 47 from separating from the position along the locking lever 41.

52 is an open handle whose base end is fixed to the shaft 48 outside the case 1.

Next, the operation of the switch constructed in this way will be explained.

Now, FIGS. 1a and 2b and FIG. 2 show the open circuit state.

In this state, the first and second links 24, 34 are bent upward, and the protrusion 38 of the fixing lever 36 is bent over the release lever 33 on the left side of the recess 33a.
A latching pawl 40 is engaged with the lower surface of the latching lever 41 and is located apart from the latching portion 41a of the latching lever 41.

Therefore, in this state, the release lever 33 can be rotated clockwise.

In this state, when the electromagnetic solenoid 14 is excited and the movable iron core 15 protrudes to the right, the first lever 16 and the second connecting link 20 approach 180°, and the interlocking lever 19 is rotated counterclockwise. , a support shaft 23 in the elongated hole 21
moves downward against the bias of the spring 25.

At this time, the operating shaft 11 is biased in the opening direction, that is, in the clockwise direction, by the spring 10 shown in FIG. 1, and the release lever 33 is rotatable in the clockwise direction.
As the support shaft 23 moves downward, the release lever 33 is rotated clockwise.

Then, as shown in FIG. 4, the protrusion 3 of the fixing lever 36
8 is once fitted into the recess 33a of the release lever 33 by the bias of the spring 39, and then moves to the right, that is, clockwise.

When the protrusion 38 comes to the right edge of the recess 33a of the release lever 33 that moves clockwise, the fixing lever 3
6 is pressed against the right side edge via the projection 38 and is then rotated counterclockwise.

As a result, the latching claw 40 of the fixing lever 36 moves downward and engages with the latching portion 41a of the latching lever 41, thereby preventing the fixing lever 36 from rotating counterclockwise.

Therefore, the release lever 33 is also fixed and cannot be rotated further clockwise.

The subsequent downward movement of the support shaft 23 is transmitted to the operating lever 22 via the first link 24.

That is, as the operating lever 22 moves downward, the operating lever 22 is rotated counterclockwise against the biasing force of the spring 10, thereby rotating the movable electrode 7 in the direction of closing the circuit.

Further, the support shaft 23 continues to move downward while resisting the bias of the spring 10.25, and the pivot point A on both sides of both links 24.34
1. When passing the put point XX passing through A2 (see Fig. 3), both the first and second links 24, 34 are bent downward, and the second link 34 is stopped by the stopper 35. Ru.

In this state, as shown in FIG. 7, the biasing force F1 of the spring 25 is applied almost upwardly to the support shaft 23, and the spring 25 is applied to the pivot point A1 of the operating lever 22 and the first link 24 via the operating shaft 11, etc. A biasing force F2 is acting diagonally upward to the left.

However, as mentioned above, the release lever 33 cannot be rotated to the left, that is, in the clockwise direction, so the pivot point A1
The biasing force F2 of the spring 10 acting on the first link 24 pushes the second link 34 toward the stopper 35, and both links 24 and 34 are locked in a downwardly bent state.

Thereby, the movable electrode 7 is locked in a closed circuit state.

Next, to perform manual loading, the loading handle 30 is rotated clockwise.

Then, the operating shaft 26 is rotated clockwise and the drive lever 27 fixed to the operating shaft 26 is moved down, so the support shaft 23 in the elongated hole 21 is moved down via the third connecting link 28. Ru.

Therefore, similarly to the above, both the first and second links 24, 34 are bent downward, and the movable electrode 7 is locked in the closed circuit state.

Next, to open the circuit, with the electromagnetic solenoid 14 demagnetized, the trip coil 45 is energized to cause the movable core 46 to protrude to the right.

Then, the latch lever 41 is rotated about the intermediate fixing shaft 42 in the direction of separating from the latch claw 40 against the bias of the spring 43, so that the lower end latch part 41a and the fixing lever are rotated. 36 is disengaged from the latching claw 40.

Therefore, the fixation to the release lever 33 is released, and the release lever 33 becomes rotatable as shown in FIG.

That is, since the shaft attachment part is in the fixed position on the outside of the second link 34 and can move to the left, both links 24
．． 34 is moved upward by the force of the spring 10 that urges the operating lever 22 in the opening direction and the force of the spring 25 that urges the supporting shaft 23 upward, and the operating lever 22 is rotated clockwise. Ru.

Therefore, rotation of the operating shaft 11 in the opening direction is allowed, and the movable electrode 7 is rotated in the opening direction by the spring 10.

When both links 24 and 34 are bent upward and the drive lever 27 is locked with the stopper 29, the support shaft 23
The upward movement of is stopped, and the movable electrode 7 is maintained in an open state.

Furthermore, as the support shaft 23 moves upward, the interlocking lever 19 is rotated clockwise, so that the second connecting link 20 and the first lever 16 become nearly perpendicular, and the movable iron core 15 of the electromagnetic solenoid 14 Immerse yourself in the left position.

After that, when the trip coil 45 is demagnetized, the latch lever 4
1 is rotated counterclockwise by the bias of the spring 43 and returns to the position shown in FIG.

Next, to manually open the circuit, turn the release handle 52 outside the case 1 counterclockwise to release the lever 4.
Rotate 7 counterclockwise.

Then, the lower end of the release lever 47 rotates the latch lever 41 clockwise, so that the latch portion 4 is rotated in the same manner as described above.
1a and the latch claw 40 are disengaged.

Therefore, in the same manner as described above, the fixation of the release lever 33 is released, the support shaft 23 is moved upward by the bias of the spring 10.25, and the movable electrode 7 is rotated in the circuit opening direction.

In this way, in the present invention, the first and second links 24,
34 to their dead center (AI, A2
In a switch that can be locked in the closing state by locking at a position slightly beyond the X-X line connecting , a fixing lever 36 that can engage with and fix the release lever 33; and a fixing lever 36 that is engaged with the release lever 33 to maintain the engaged state between the fixing lever 36 and the release lever 33. In addition, by providing a locking lever 41 that releases the lock in conjunction with the release operation, even if the lock is past the dead center, a large force is not required to release the trip coil. 45
It can be opened using a small capacity device such as.

Furthermore, since the release lever 33 is provided with a recess 33a that can be engaged with the protrusion 38 of the fixing lever 36, once the protrusion 38 is engaged with the recess 33a, the release lever 33 can be fixed at the side edge connected to the recess 33a. The locking lever 36 can be moved in the direction of engaging the locking lever 41, thereby providing an excellent effect that the initial movement of the release lever 33 to engage the fixing lever 36 can be performed smoothly.

[Brief explanation of the drawing]

Figure 1a is a sectional view of the road body of the switch;
The figure is a cross-sectional view of the opening/closing operation mechanism showing the open circuit state, FIG. 3 is a cross-sectional view of the same opening/closing operation mechanism showing the closed circuit state, FIG. 6 is a sectional view of the main part of the present invention when the trip coil is energized, FIG. 6 is a partial sectional view showing the input handle, and FIG. 7 is an explanatory view of the main part of the present invention. Fixed electrode...5, Movable electrode...7, Operating lever...22, Support shaft...23, First link...24 , release lever...3
3.Second link...34.Fixing lever...
...36, Latching claw...40, Latching claw...
...41, Trip coil...45°

Claims (1)

[Claims for Utility Model Registration] 1. Two levers 24 connected to each other by a support shaft 23.
34 at a position slightly beyond their dead center, the switch is equipped with a locking mechanism that locks the closed state, and the fixed shaft of one lever 34 has a shaft that can be released from the fixed shaft. The released lever 33 that has been attached, a fixing lever 36 whose part 38 engages with a recess 33a provided in the release lever 33 to fix it, and the fixing lever 36 is hooked and fixed. A switching device for a switch, characterized in that it is equipped with a locking means 41, etc., which maintains the engaged state of the lever 36 and the release lever 33, and releases the locking in conjunction with the opening operation. 2. The switching device for a switch according to claim 1, wherein the latching means 41 and the like are configured to be unlatched by excitation of the trip coil 45 or manual operation.