JPS6253891B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch provided with a movable electrode that is detachable from a fixed electrode provided in a switch box.

An example of a switch with a conventional structure will be described with reference to FIG.
Then, the main circuit is opened and closed by inserting or removing the U-shaped movable electrode 5 from the fixed electrode 3b provided on the cable 4 lead-in side.

In the figure, 6 is a removable operating mechanism with a movable electrode 5.
Each time an opening/closing operation is performed, it is attached to an appropriate fixed part within the switch box 1. Further, 2a and 2b represent the generating lines of adjacent phases.

Before the operating mechanism 6 is attached to the switch box 1, a built-in spring is stored using an arbitrary winding handle (not shown), and the operating mechanism 6 is held in the stored power state by a stopper 6a. 7 is a release rod for removing the stop 6a.

The operating mechanism 6 is connected to the movable electrode 5 by a pin 8, and when the stop 6a is removed by the release rod 7, the stored force of the built-in spring is released at once, and the movable electrode 5 performs a circuit opening or closing operation.

In such a conventional example, it is necessary to once remove the operating mechanism 6 each time the movable electrode 5 is attached or detached, which is very inconvenient in terms of maintenance.

Furthermore, since the operating mechanism 6 is attached and operated in front of the movable electrode 5, there is also the drawback that the operating space becomes large.

In the present invention, a mechanism part is attached to the upper part of the switch box so that the movable electrode can be operated horizontally, and the movable electrode can be attached and detached without being obstructed by the mechanism part. Examples will be explained below.

In FIG. 2, parts that are the same as those in the conventional structure are designated by the same reference numerals, and redundant explanation will be omitted.

In the figure, reference numeral 9 denotes an operating mechanism attached to the upper part of the switch box 1, and a built-in spring is energized by the operating handle 10.

9a is the output shaft of the operating mechanism 9, and the output lever 11
is fixed. The output lever 11 has the role of horizontally driving the movable electrode 5 in cooperation with the guide rail 12.

The configuration of the output lever 11 and guide rail 12 is as follows:
This will be explained with reference to FIG. 3, which shows an enlarged view of the main body of the switch.

3A is a front view of the switch, FIG. 3B is a side view, and FIG. 3C is a plan view.

Here, FIG. 3a shows an AA view of FIG. 3b. In these figures, the switch box 1, the bus bars 2, 2a, 2b, and the operating mechanism 9 are omitted.

A connecting rod 13 passes through the movable electrodes 5 of each phase and connects them together. Arms 13a are provided on both sides of the connecting rod 13.
is provided, and a roller 14 attached to the arm 13a
It is slidably guided by a guide rail 12 having a U-shaped cross section.

The guide rail 12 is connected to the fixed part 1 inside the switch box 1.
It is attached and supported by a.

The output lever 11 has a cutout 11a at its tip, which is engaged with the connecting rod 13, and the output lever 1
As the movable electrode 5 rotates, the movable electrode 5
horizontally along the guide rail 12.

Next, the process of moving the movable electrode 5 to the closed circuit position, the open circuit position, and the detachable movable position by the output lever 11 will be explained with reference to FIGS. 4a, b, and c.

In FIG. 4a, the movable electrode 5 is connected to the fixed electrodes 3a and 3.
b, the connecting rod 13 of the movable electrode 5 is locked to the cutout 11a of the output lever 11, and the movable electrode 5 is held in the closed circuit position.

Reference numeral 15 denotes a lock pin having a semicircular cross section, and both ends of the lock pin are rotatably attached to appropriate locations in the mechanism section. Note that 15a is a release lever for rotating the lock pin 15, and 15b is a return spring.

In FIG. 4a, the lock pin 15 is in a free state. The lever 16 is the output lever 1
1 and their fulcrums are fixed to the output shaft 9a.

The lever 16 is connected to an arbitrary spring mechanism via a pin 17 and a rod 18. Note that 19 is fixed to the output shaft 9a or the output lever 11 with a stopper, and rotates around the output shaft 9a as the output lever 11 rotates.

In such a state, when the operating mechanism is activated and an upward force is applied to the rod 18, the lever 16,
The output lever 11 rotates counterclockwise via the output shaft 9a, and the connecting rod 1 sandwiched between the cut portion 11a
3 is guided by a guide rail 12 (not shown) and moves to the right in the drawing to assume the position shown in FIG. 4b. In this case, the stop 19 comes into contact with the lock pin 15, so that the output lever 11 cannot be moved any further. Connecting rod 13
The position of the movable electrode 5 is regulated by the cut portion 11a, and the movable electrode 5 is held at a first position in which it is impossible to remove the movable electrode 5 in an open state.

Next, when it becomes necessary to remove the movable electrode 5 to inspect the electrode section, the lock pin 15 will rotate counterclockwise by pulling the release lever 15a to the right in the figure, and the lock pin 15 will be unlocked from the stopper 19.
The output lever 11 can be further rotated counterclockwise from the position shown in FIG.
The movable electrode 5 can be removed from the switch box 1. This state is shown in FIG. 4c.

Next, to attach the removed movable electrode 5, it is sufficient to perform the operation opposite to that described above.

That is, after inserting the arm 13a of the connecting rod 13 and the roller 14 into the guide rail 12, the movable electrode 5 is pushed from the position shown in FIG. 4c to the position shown in FIG. 4b. Then, the connecting rod 13 engages with the cut portion 11a. At this position, the lock pin 15 is rotated clockwise by the action of the return spring 15b and is locked with the stop 19. In this way, the movable electrode 5 returns to its first, non-removable open position.

To perform the circuit closing operation from the first open position shown in FIG.
Since the movable electrode 5 is rotated clockwise, the movable electrode 5 is closed via the connecting rod 13.

In the embodiments described so far, the output lever 11
Although the cut portion 11a of FIG.
The cut portion can also be made into a dogleg shape as shown in the figure.

Furthermore, in order to make it easier to insert the connecting rod 13 of the movable electrode 5 in the second open position, one side of the two sides of the cut portion on the inner fixed electrode side can be bent into an L shape as shown in FIG. 5b. .

As explained above, according to the present invention, there is an advantage that the movable electrode can be easily attached and detached without removing the operating mechanism due to the simple structure, and it is also possible to easily and reliably lock the movable electrode to prevent it from falling off when there is no need to detach it. It has the advantage of being able to do

[Brief explanation of the drawing]

FIG. 1 is a side view showing a conventional example, FIG. 2 is a side view showing an embodiment of the present invention, and FIG. 3 is an enlarged view of the main body of the switch, in which a is a front view, b is a side view, c.
is a plan view. Figure 4 is a diagram showing the relationship between the output lever and the movable electrode, where a is the closed circuit position, b is the open circuit position,
c indicates the removable position. Figure 5 a, b
2A and 2B show second and third embodiments of the cutout portion of the output lever. In the figure, 1 is a switch box, 3a and 3b are fixed electrodes, 5 is a movable electrode, 9 is an operating mechanism, 11 is an output lever, 11a is a cutout, 12 is a guide rail, 13 is a connecting rod, and 13a is an arm , 15 is a lock pin.

Claims (1)

[Claims] 1 The operating mechanism installed at the top of the switch box allows
In a switch that is opened and closed by a fixed electrode by horizontally moving a movable electrode provided at the bottom of the operating mechanism, arms are provided on both sides of a connecting rod that collectively connects the movable electrodes of each phase, and the arms are connected to the switch. The movable electrode is supported by slidingly fitting into the guide rails provided on both sides, and a cutout that can be engaged with the connecting rod is provided at the tip of the output lever of the operating mechanism, so that the upper output lever and the connecting rod are engaged. The first movable electrode is released from the fixed electrode.
The switch has a lock pin that is stopped at the position, and is configured to be movable to a second position where the output lever and the connecting rod are disengaged at the position where the lock pin is released and the movable electrode can be attached and detached. .