JPS6337712Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a vacuum shear breaker, and more particularly to a vacuum sheath breaker having a manual tripping mechanism for a trip hook and an opening/closing display mechanism configured using the same.

Vacuum breakers are always equipped with a trip hook mechanism that allows for electromagnetic tripping and manual tripping, but conventional mechanisms are complex and require multiple links and bearings, as well as manual tripping rods, guides, etc. It was hot. In addition, there was no opening/closing display means for externally identifying whether it was turned on or off.

Purpose of the invention The present invention has been made in view of the above-mentioned conventional problems, and it simplifies the structure of the trip hook for manual tripping, and provides an operation button for manual operation at one end of the trip hook. The purpose of this project is to propose a vacuum shutoff switch whose button also serves as a display for the on/off state.

Summary of the invention In order to achieve the above object, the vacuum interrupter according to the invention houses a vacuum interrupter in an insulating frame, and its movable lead rod is pivoted around a pivot point so as to be swingable. interlockingly connected to an insulated operation plate, connecting a shear and a cutting spring to the insulated operation plate, and pivotally supporting a roller for a charging cam, and press-contacting a charging cam rotated by a charging drive mechanism to the roller; Furthermore, the insulated operation plate is provided with a releasably disposed tip of a trip hook which is rotatably operated by a shear cutting solenoid via a roller, and which is pivoted on a shear shaft. A removal bracket is provided, and an operation button that also serves as an on/off display is fitted into the bracket, and the operation button is located in a window hole provided in the insulating frame, so that the position of the operation button can be identified from the outside. It is characterized by being configured so that it can be operated externally.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Figs. , Figure 6~
FIG. 8 is a diagram showing a manual trip hook and its associated mechanism.

As shown in FIG. 2, an operating plate 3 is rotatably attached via an operating shaft 2 to an insulating frame 1 constituting the main body of the vacuum shield disconnector. The operation panel 3
In this case, polyester brimics having insulating properties are used to also serve as an insulating member for maintaining insulation between the movable lead rod 6 and the input cam 15, etc., which will be described later. An arm 4 is formed on the top of the operation plate 3, and the upper end of the arm 4 is in contact with an auxiliary switch 9 fixed to the insulating frame 1.

On one side (left side in FIG. 2) of this operation panel 3, three vacuum interrupters 5 are arranged horizontally.
The end of each movable lead rod 6 is pressed into contact with a spring 7.
and a stud bolt 8, and the direction of the axis of the movable lead rod 8 substantially coincides with the rotating direction (horizontal direction) of the operating plate 3. These three vacuum interrupters 5 are attached to the insulating frame 1 via stays 10, and a fixed side terminal 11 and a movable side terminal 12 are arranged from each vacuum interrupter 5 to the outside of the insulating frame 1. (Figure 2).

And between these vacuum interrupters 5,
A crinkle spring is provided as a biasing means 13 for biasing the operation plate 3 toward the opposite side of the vacuum interrupter 5 and cleaving the vacuum interrupter 5. The biasing means 13 is provided between the stay 10 and the operating plate 3 by passing through a guide rod 14 fixed to the stay 10 to prevent deflection due to its own weight and as a guide.

On the other hand, on the other side of the operation plate 3 (on the right side in FIG. 2), there is a rotatable input cam 15 that presses the operation plate 3 toward the vacuum interrupter 5 side against the urging force of the urging means 13 to perform input. It is set in. As shown in FIG. 4, this input cam 15 has a sloped portion 16 on its side surface, and the side surface abuts against a roller 17 rotatably provided on the operation plate 3.

Since the vacuum interrupter 5 must be turned on at a certain speed, a power accumulating means 18 for storing energy for rotation of the closing cam 15 is connected to the closing cam 15. The energy storage means 18 is the second
In the figure, it is provided on the right side of the input cam 15, and its structure will be explained based on FIG. 3. A motor 19 is fixed to the insulating frame 1, and an eccentric cam 20 is integrally attached to the output shaft of the motor 19. On the other hand, the insulating frame 1 is provided with a rotating shaft 21 that is rotatable only in the direction of the arrow through a bearing 26, a thrust bearing 25, and a one-way clutch 24, and a rotating shaft 21 that is rotatable only in the direction of the arrow through a one-way clutch 28. The distal end of the swing arm 22, which is freely attached, engages with the eccentric cam 20.
That is, the eccentric cam 20 is rotatably fitted into a notch 23 formed at the tip of the swinging arm 22, and the swinging arm 22 swings around the rotation shaft 21 due to its rotation. It's summery.

Note that the one-way clutch 28 also has the function of rotating the rotating shaft 21 only in the direction of the arrow, like the other one-way clutch 26. In addition, an eccentric cam 27 is integrally attached to the rotating shaft 21,
The eccentric cam 27 is rotatably fitted into the closing spring hook 30 via a bearing 29. This closing spring hook 30 is used to hold the closing spring 31.
The closing spring 31 is attached to the insulating frame 1 via the closing spring 31, and a tensile force is always applied to the closing spring 31. The input cam 1 is attached to one end of the rotating shaft 21 configured as described above.
5 is attached.

Further, the closing operation mechanism section 32 of the vacuum chamber disconnector is constructed as follows. That is, as shown in FIG. 3, a closing latch 34 having a notch 33 is attached to the rotating shaft 21, and a closing hook 35 that comes into contact with the notch 33 to stop the rotation of the closing latch 34 is rotatably provided. It is being In the figure, 36
37 is a spring that urges the end of the closing hook 35 toward the notch 33; 37 is a closing solenoid that pulls off the notch 33 and the end of the closing hook 35 to close the vacuum interrupter 5; and 38 is a closing solenoid. This is a limit switch that stops the rotation of the motor 19 at the same time as the rotation of the rotating shaft 21 is stopped.

Furthermore, the shrinking operation mechanism of the vacuum interrupter 5 is constructed as follows. As shown in FIG. 3, a shaft 40 is rotatably provided on the other side of the operation plate 3, and one end of the shaft 40 engages with a roller 41 provided on the operation plate 3. A trip hook 42 is fixed, and a shear cutting solenoid 43 for rotating the shear cutting shaft 40 is attached to the other end. In the figure, 45 is a spring, and 46 is a stopper.

A manual tripping bracket 42a is integrally provided on the trip hook 42, and an operation button 42b which also serves as a loading/discharging display is fitted at the tip of the bracket 42a. This operation button 42b is located in a window hole 47 provided in the insulating frame 1 as shown in FIG. Depending on whether the button 42c is located above or below the window hole 47, the on or off state can be identified from the outside.

The operation button 42b is fitted onto the bracket 42a, and is provided through a cotter pin 48 so that it cannot be removed from the bracket 42a, as shown in FIG. In addition, the operation button 42
There is a concave part 42 on the bottom surface of b to make it easy to hold by hand.
It forms c. Furthermore, the outer end surface 50 of the operating button 42 is formed into an arc shape with the cutting axis 40 as the center and having a curvature equal to the curvature of the circumference drawn by the radius _R1 . When it moves up and down, the outer end surface 50 moves on the circumference of the radius _R1 and does not protrude from this point, so it is possible to eliminate the risk of accidentally bumping into something. In FIG. 6, a rotary arm 49 is fixed to the cutting shaft 40, and a pin 52 protruding from the side thereof is connected to a long hole 5 provided in the manual lever 43a at the tip of the cutting solenoid 43.
1 is fitted.

Note that 44 is a projection that comes into contact with a stopper (not shown) to stop the rotation of the operation plate 3.

Next, the operation of the vacuum shield disconnector will be explained. To turn on the vacuum interrupter 5, the motor 19 is rotated in advance to store energy. motor 19
When rotated, the eccentric cam 20 rotates, causing the swinging arm 22 to swing, and the action of the one-way clutches 28 and 24 decelerates the rotating shaft 21, causing it to rotate in the direction of the arrow. Then, in FIG. 4, the contact position of the roller 17 against the input cam 15 changes from A ₁ to B ₁ shown by the solid line (storage range), and at the position of B ₁ ,
The rotation of the closing cam 15 is stopped by the action of the closing latch 34 and the closing hook 35, and at the same time, the rotation of the motor 19 is stopped by the action of the limit switch 38. At this time, T of the eccentric cam 27
The point moves from the position of A ₂ shown in Figure 5 a to B ₂ shown in b
It rotates to the position (slightly to the left of C on the opposite side of A ₂ ), the closing spring 31 is pulled, and the energy storage is completed. After this, when the end of the closing hook 35 is removed from the notch 33 by the closing solenoid 37, the biasing force of the closing spring 31 moves the eccentric cam 27 from the _B2 position shown in FIG. Rotate to the _A2 position shown.

At this time, the contact position of the roller 17 against the input cam 15 is as shown by the broken line (release range) in FIG.
The state changes from B ₁ to A ₁ and the roller 17, that is, the operation plate 3 is pushed toward the vacuum interrupter 5 against the biasing force of the biasing means 13, and the application of the vacuum interrupter 5 is completed. When the roller 17 reaches the _A1 position of the input cam 15, there is no slope 16 at this position, so no force is exerted to press the operation plate 3, but the manual trip 42, which is biased by the spring 45, stops working.
contacts the roller 41 and locks the operation plate 3, so the closed state of the vacuum interrupter 5 is maintained.

Conversely, in order to break the vacuum interrupter 5, the break shaft 40 is activated by the break solenoid 43.
By rotating the lever in the direction of the arrow to disengage the manual trip 42 and the roller 41, the biasing means 13
The operation plate 3 is moved to the vacuum interrupter 5 by the urging force of
Rotate in the opposite direction to complete the shear cutting. If the shroud solenoid 43 cannot be used due to a malfunction, the manual trip 42 can be pushed from the outside in the direction of the arrow.

Note that the energy accumulating means is not limited to that shown in this embodiment, and various structures can be considered. Furthermore, the number of vacuum interrupters is not limited to three.

Effects of the Invention As explained above, according to the vacuum interrupter of the present invention, an insulated operating plate having a charging roller and connected to a movable lead rod of a vacuum interrupter is rotatably supported, and A shear spring acts on the insulated operation plate, and a rotatable input cam linked to the input drive mechanism is connected to the input roller and can be separated from the input roller to input or disconnect the vacuum interrupter. Therefore, the structure is of course significantly simpler than the conventional loading means using a complicated link mechanism, and in addition, a manual tripping bracket is provided at one end of the trip hook, and an operation button is fitted to the end of the bracket. The trip mechanism for manual tripping is significantly simpler than conventional mechanisms that use complicated links, bearings, manual tripping rods, guides, etc. In addition, since the operation button also serves as an on/off display, the open/closed state of the vacuum cutter can be identified at a glance from the outside, thereby eliminating the risk of malfunction.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a front view of a vacuum shield breaker, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Figs. 3, 4, and 5. 6 is a perspective view of the manual tripping mechanism of the trip hook, FIG. 7 is a sectional view of the operation button, and FIG. 8 is an explanatory diagram of the operation of the manual tripping mechanism. It is. 2... Operating shaft, 3... Operating plate, 5... Vacuum interrupter, 6... Movable lead rod, 13... Biasing means, 15... Closing cam, 18... Energy storage means, 32
... Closing operation mechanism section, 39 ... Shrinking operation mechanism section, 41 ... Roller, 42 ... Trip hook,
42a...Bracket, 42b...Operation button, 47
...Window hole.

Claims (1)

[Scope of utility model registration request] A vacuum interrupter is housed in an insulating frame, and its movable lead rod is interlocked and connected to an insulated operation plate that is swingably supported around a shaft support, and a scissors and a cutting spring are connected to the insulated operation plate. At the same time, the input cam roller is pivotally supported, and the input cam, which is rotatably operated by the input drive mechanism, is configured to be able to be pressed against and separated from the roller, and furthermore, the insulated operation plate is connected to the insulating operation plate by a shearing solenoid via the roller. The tip of a trip hook that is pivoted on a shaft that rotates is detachably provided, and a bracket for manual release is provided integrally with the trip hook, and the trip hook is inserted into the bracket. A feature is that an operation button that also serves as a cutout display is fitted, and the operation button is located in a window hole provided in the insulating frame, so that the position of the operation button can be identified from the outside and can be operated from the outside. Vacuum cutter.