JPS6025806Y2 - External operating handle mechanism for circuit breakers and disconnectors - Google Patents

Description

[Detailed description of the invention] This invention is an external operation bundle mechanism for a circuit breaker, in particular, a circuit breaker installed in a housing such as a switchboard or control panel can be operated from the outside of a panel of the housing using an external operation bundle. This relates to an externally operated bundle mechanism.

The externally operated bundle mechanism of modern circuit breakers is generally O
A circuit breaker with N, OFF and reset positions is operated by an external operating bundle from an external force on the panel of the enclosure, so that the external operating bundle can remove or open the panel in the reset position and open the panel in the ON and OFF positions. The panel is locked so that it cannot be removed or opened, and a panel lock release knob is provided so that the panel can be unlocked and opened in case of an emergency while the panel is locked.
By operating this panel lock release knob, the panel is configured to be removed or opened for maintenance and inspection even when the external operation bundle is in the ON and OFF positions.Furthermore, unnecessary bundle operations can be performed on the external operation bundle. In order to prevent this, the bundle can be locked by locking the padlock.

However, the panel lock and bundle lock of the externally operated bundle mechanism as described above are provided independently of each other, and are used for devices such as distribution boards that are connected remotely to the load side of the circuit breaker operated by the externally operated bundle. Even if the panel is locked in the OFF position by an external operation bundle for maintenance and inspection of load-side equipment, and the bundle is locked with a padlock to prevent ON operation, a third party may be unable to open the panel release knob. If the panel was removed or opened by operating the circuit breaker and the circuit breaker was turned on, there was a risk of a fatal accident.

Therefore, the purpose of this invention is to eliminate such danger and maintain safe operation by turning off the external operating handle.
A protruding cover that rotates together with the external operating handle when the knob is in position covers the panel lock release knob and prevents the panel lock release from being removed or opened, and further locks the external operating handle with a padlock. To provide an external operation handle mechanism for a circuit breaker which can lock the handle and maintain reliable safe operation.

The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

The drawings show one embodiment of the external operating handle mechanism of the circuit breaker of this invention, and FIG. 1 shows a schematic device that is the background of this invention, including a switchboard and controls.

This circuit breaker 2 is ON. It has OFF and reset operation positions, and is operated from the outside by an external operation handle 3 provided on a handle seat 4 fixed on the panel 1 of the storage body.

That is, the external operating mechanism section 5 attached to the circuit breaker main body and the external operating knob 3 are connected by a connecting shaft 6,
By rotating the external operating handle 3, the rotational force is transmitted to the external operating mechanism section 5 via the connecting shaft 6, and the operating handle 7 of the circuit breaker 2 is moved by the external operating mechanism section 5 to complete the circuit. 2 and the disconnector 2 are opened and closed.

Figure 2 shows the case when the handle is locked, and Figure 3 shows the case when the handle is unlocked.
In the side sectional view of the part, a handle seat 4 is screwed around a cutout hole 1' provided in a panel 1, and a through hole 4a and counterbore holes 4b, 4c are provided in the handle seat 4 in a stepped manner. There is.

The shaft portion of an external operating handle 3 is rotatably fitted into the through hole 4a of the handle seat 4, and the external operating mechanism portion 5 of the circuit breaker 2 is connected and supported in the handle shaft hole 3a of the external operating handle 3. A connecting shaft boss 6a provided at one end of the connecting shaft 6 is inserted, and an operating pin 8 passing through the operating shaft boss 6a at right angles to the axial direction is integrally bottomed at the outer periphery of the handle shaft hole 3a. It is engaged and connected to the engagement groove 3b.

The handle lock lever 9 is rotatably supported by a shaft 10 so as to fit behind the handle of the external operating handle 3, and is normally placed in the ON position provided on the handle seat 4 as shown in FIG. Lock R1la, 11b in OFF position
Remove the handle lock lever spring 12 from the
The external operation handle 3 is biased so as not to interfere with the rotational operation of the external operation handle 3.

In order to prevent the external operation handle 3 from being operated, the handle lock lever 9 must be turned in the ON and OFF positions as shown in Figure 2.
is rotated as shown by arrow A from the state shown in FIG. By inserting and locking the lever 14 of the padlock 13 into the gap g created between the handle lock lever 9 and the handle lock lever 9, operation of the external operating handle 3 is prevented and the handle is locked. .

As shown in FIGS. 2 to 10, the external operating handle 3
A handle cam 15 is mounted on the back of the shaft of the handlebar, and a panel lock lever 16 is held between the shelf of the counterbore hole 4b of the handle seat 4 and the panel lock lever holding plate 17. One end of the panel lock lever 16 is fitted onto the square shaft portion 18a of the panel lock release knob 18 whose head is exposed on the surface of the handle seat 4, and is rotatably supported by the shaft, and a projection in the center At 16a, a panel lock lever spring 19 is elastically biased in the direction of the connecting shaft boss 6a.

Further, the panel lock lever 16 is provided with a guide groove 20, into which a guide pin 21 provided on the panel lock lever press plate 17 mounted on the shelf of the counterbore hole 4c is slidably fitted. There is.

Furthermore, the protrusion 16b at the other end of the panel lock lever 16 is adapted to engage and release the flange of the connecting shaft boss 6a.

Further, an operating pin 22 of the panel lock lever 16 is provided corresponding to the tooth-shaped protrusion piece 15a of the handle cam 15.

As shown in FIGS. 4 and 5, the shaft portion of the external operating handle 3 is provided with a protrusion cover 3c that integrally rotates along the surface of the handle seat 4. When the external operation handle 3 is in the OFF position, the panel lock release knob 18 exposed on the surface of the handle seat 4 is covered to prevent operation of the panel lock release knob, and in the ON position, the panel lock release knob 18 is exposed and the panel lock release knob 18 is exposed. It is formed so that the lock release knob 18 can be operated.

With this configuration, when the external operating handle 3 is in the ON position, the panel lock is such that when the external operation handle 3 is in the ON position, the protrusion 16b of the panel lock lever 16 is activated by the panel lock lever spring 19 to lock the circuit breaker. Operation mechanism section 5
The panel 1 is biased to the engagement position with the flange of the connecting shaft boss 6a of the connecting shaft 6 fixedly supported by the connecting shaft 6, so that the panel 1 cannot be removed or opened.

Furthermore, even if the external operation handle 3 is operated to the OFF position and the handle cam 15 is rotated, the panel lock lever 16 remains in the ON position as shown in FIG. The protrusion 16b is the connecting shaft boss 6a
The panel 1 cannot be removed or opened.

Further, when the external operating handle 3 is in the reset position, the toothed projection piece 15a of the handle cam 15 is moved to the panel lock lever 1 by operating the external operating handle 3, as shown in FIG.
Push up the operation pin 22 of 6 to lock the panel lock lever 16.
is rotated about the shaft 18a of the panel lock lever release knob 18, and the protrusion 1 of the panel lock lever 16 is rotated.
6b is disengaged from the flange of the connecting shaft boss 6a,
The panel 1 can be removed or opened to allow maintenance and inspection of the interior of the housing.

In addition, when the external operation handle 3 is in the ON position, the panel lock release knob 18 exposed on the surface of the handle seat 4 is rotated and held in the release position in case of an emergency.
At the position where the protrusion 16b of 6 and the flange of the connecting shaft boss 6a are disengaged, the panel 1 can be removed or opened for maintenance and inspection.

The external operation handle mechanism of the circuit breaker of this invention is as described above (the circuit breaker, which has ON, OFF and reset operation positions, can be operated from the external operation handle by external force from the panel of the storage body).
When the external operating handle 3 is in the reset position, the panel can be removed or opened, and turned ON and OFF.
In the case where the panel 1 is locked so that it cannot be removed or opened in the position, and in an emergency, the panel 1 can be removed or opened by operating the panel lock release knob 18, the external operation When the handle 3 is in the OFF position, the protrusion cover 3c, which rotates together with the external operating handle 3, prevents the panel lock release knob 18 from being operated. When the padlock is locked at -9, the operation of the external operation handle 3 and the opening of the panel 1 are completely prevented, so that safe operation is reliably maintained.

[Brief explanation of drawings]

Figure 1 is a side view of the schematic layout of the equipment that forms the background of this invention.
Figures 2 and 3 are side sectional views showing the external operation handle mechanism of this invention. Figure 2 shows the handle when the padlock is locked, and Figure 3 shows the handle when the handle is unlocked. 4 and 5 are front views showing the external operation handle mechanism of this invention, with FIG. 4 showing the ON position and FIG. 5 showing the OFF position. Figure 6 shows a rear view of the external operation handle mechanism of this invention in the ON position, Figures 7 and 8 are rear views of the main parts of the panel lock, Figure 7 shows the OFF position, and Figure 8 shows the reset. Show location. 9 and 10 are a back view and a side view illustrating the main parts of the panel lock lever. In the figure, 1...Panel, 2...Circuit breaker, 3...External operation handle, 3c...
...Protrusion cover, 5...External operation mechanism section, 6...
...Connection shaft, 9...Handle lock lever
111a, 11b=lock groove, 12...
Handle lock lever spring, 13... Padlock, 15... Handle cam, 16...
・Panel lock lever 17...Panel lock lever presser plate, 18...Song panel lock release knob, 2
0...Guide groove.

Claims (1)

[Claims for Utility Model Registration] An external operating bundle 3 provided on a bundle seat 4 fixed on a panel 1 of a storage body in which a circuit breaker 2 is provided, and a bundle shaft hole 3a of the external operating bundle 3. A connecting shaft 6 inserted and connected to the external operating mechanism section 5 of the circuit breaker 2
, a bundle cam 15 provided on the back side of the shaft of the externally operated bundle; a bundle cam 15 disposed between the bundle seat 4 and the panel lock lever presser plate 17; one end rotatably supported by the panel lock release knob 18; Panel lock lever 16 pressed in the direction of connecting shaft 6 by release spring 19
, a protrusion 6b1 provided at the other end of the panel lock lever 16 in order to be able to engage and release the flange of the connecting shaft 6; Projection piece 15a1 A cover portion 3c that is provided so as not to rotate together with the external operation bundle so as to cover the panel lock release knob 18 at the OFF position of the external operation bundle where panel lock is performed. An external operation bundle mechanism for a circuit breaker, characterized by comprising: