JPH0323770Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a closed switchboard device containing a drawer-type circuit breaker.

[Conventional technology]

Conventional closed switchboard devices of this type are shown in Figures 6 to 1.
Figure 1 will be explained. In the figure, 1 is a closed switchboard, 2 is its primary terminal, 3 is a drawer type circuit breaker,
4 is its primary connector, and 5 is a secondary connector unit installed on the top of the circuit breaker 3.
It is composed of a fixed frame 5a fixed to the fixed frame 5a and a movable frame 5b slidably inserted into the fixed frame 5a.
6 is a movable-side secondary connector attached to the movable frame 5b, 7 is a secondary connector attached to the closed switchboard 1, and 8 is a butterfly bolt for fixing the movable frame 5b to the fixed frame 5a. It is screwed into the stopper 10 of the movable frame 5b through the hole 9. 11 has one end connected to the movable frame 5b and the other end connected to the fixed frame 5
A manually operated rod protrudes forward from the front hole 12 of a, and is connected by a connecting pin 13 so that the middle part thereof is bent.

In FIGS. 6 to 9, the secondary connectors 6 and 7 are also attached and detached by inserting and removing the circuit breaker 3. In other words, when the primary connector 4 is disconnected and connected, the two movable connectors 6 are automatically disconnected and connected. Therefore, the movable frame 5b is fixed to the fixed frame 5a by wing bolts 8, and the manual operation rod 11 is folded at the connecting pin 13 and fixed to the front surface of the fixed frame 5a by a clamper (not shown). FIG. 6 shows the state in which the circuit breaker 3 is inserted. In this state, the primary connector 4 is connected to the primary terminal 2 and becomes energized, and the movable secondary connector 6 is connected to the secondary connector 7.
is connected to constitute a secondary side control circuit. Note that FIGS. 7 to 9 show the state in which the circuit breaker 3 is pulled out.

Next, at the disconnection position of the primary connector 4 with the circuit breaker 3 pulled out as shown in FIGS. 7 to 9, the movable secondary connector 6 is
When connecting, first remove the butterfly bolt 8 to free the movable frame 5b, then remove the manual operation rod 11 from the clamper and extend it straight. In this state, the manual operation rod 11 is pushed in to move the movable frame 5b, and the movable side secondary connector 6 is connected to the secondary connector 7 as shown in FIGS. 10 and 11.

[The problem that the idea aims to solve]

Since the conventional closed switchboard device is configured as described above, when the movable side secondary connector 6 is connected at the disconnection position of the circuit breaker 3 and an opening/closing test is performed on the circuit breaker 3, the movable frame 5b is connected to the fixed frame 5a. Since the movable side secondary connector 6 gradually comes off from the secondary connector 7 due to vibrations during the opening/closing test of the circuit breaker 3, the control circuit is cut off, and the circuit breaker 3 is remotely controlled by electrical operation. become unable to
There were problems such as interfering with the test and delaying or erroneously determining abnormality detection due to the circuit breaker 3 not operating.

This idea was devised to solve the above-mentioned problems, and by preventing the movable secondary connector from coming off due to circuit breaker switching vibrations, it is possible to improve the reliability of circuit breaker switching tests by remote control. The purpose is to obtain an improved closed switchboard device.

[Means to solve the problem]

The closed switchboard device according to this invention is provided with a stopper spring consisting of a substantially U-shaped wire spring that engages with a fixed frame and prevents the axial movement of the manually operated rod, and a A manual operation lever is provided for pushing in and initially pulling out.

[Effect]

In this device, when the movable secondary connector is pushed in by the manual operation rod, the spring passes through the front hole against the spring force, and when it is in the connected state, it returns due to the spring force and engages with the fixed frame. Prevents the operating rod from moving forward. Further, since the final push and the initial pull-out can be performed using a manual operation lever, the final push-in and the initial pull-out, which require a great deal of force, can be easily performed.

〔Example〕

1 to 5 show an embodiment of this invention, and in the figures, numerals 1, 5 to 7, and 9 to 13 are the same as those of the conventional device. 14 is a slit provided in the middle part of the manual operation rod 11, and a recess 14a is formed in the front part. 15 is approximately U inserted into the slit 14
A wire spring in the shape of a letter U, with outward chevron-shaped protrusions 15a and 15 respectively located in the middle of both sides of the U-shape.
The U-shaped folded portion is supported by pins 16 so that a protrudes from the surface of the manual operation rod 11, and both ends of both sides of the U-shape are inserted into the recesses 14a and held within the slit 14. . 17 is a shaft inserted into the manual operation rod 11 so as to protrude from its surface; 18 is a manual operation lever provided on the front surface of the fixed frame 5a; the intermediate portion is supported by a support shaft 19; and the tip is engaged with the shaft 17. It has a matching recess 20. 2
1, the manual operation lever 18 is inserted into the front piece 20a of the recess 20.
Only this is a torsion spring that biases the fixing frame 5a so that it comes off the shaft 17 and stands up in front of the fixed frame 5a.

When connecting the movable secondary connector 6 at the disconnection position of the circuit breaker, first push in the manual operation rod 11. The movable side secondary connector 6 is the secondary connector 7
The shaft 17 hits the rear piece 20b of the recess 20, and from this point the manual operating lever 18 is tilted in the direction of the arrow 22 against the twist spring 21. At this time, since the shaft 17 engages with the recess 20 of the manual operation lever 18, the manual operation rod 11 is pushed in against the wire spring 15, and the movable side secondary connector 6 is connected to the secondary connector 7. At that time, the two chevron-shaped protrusions 15a, 15a of the wire spring 15 are pressed by the front hole 12, inserted into the slit 14, passed through, and then returned by the spring force, as shown in FIGS. 1 and 3. Since it engages with the fixed frame 5a, the manual operation rod 11 is prevented from moving forward, and the movable side secondary connector 6
can't be removed.

Next, when returning the movable side secondary connector 6 to the disconnected position, first move the manual operation lever 18 to the arrow 2 in FIG.
Raise it in direction 3. At this time, the manual operation lever 18
The shaft 17 is driven by the recess 20, and the manual operating rod 11 is moved forward against the wire spring 15. When the wire spring 15 passes through the front hole 12, the shaft 1
7 is released from the front piece 20a of the recess 20. In this state, the manual operation lever 18 is erected by the twist spring 21. After that, all you have to do is pull the manual operation rod 11 forward.

By providing the manual operation lever 18 in this way, the movable side secondary connector 6 can be connected to the secondary connector 7.
It can be reliably and easily connected to the connector 7 and can be easily pulled out from the connector 7. In other words, when the lever-type manual operating lever 18 is used to perform the final push-in and initial withdrawal of the manual operating rod 11, sufficient force is obtained through the application of the lever, so that the large force acting against the wire spring 15 can be avoided. The necessary final push-in and initial pull-out of the manual operating rod 11 can be accommodated.

[Effect of idea]

As explained above, this device has a simple structure in which a stopper spring is provided on the manual operation rod to prevent the movable side secondary connector from coming off due to circuit breaker opening/closing vibrations, thereby making it possible to conduct circuit breaker opening/closing tests by remote control. This improves reliability, and since the manual operating lever performs the final push-in and initial withdrawal of the manual operating rod, the final push-in and initial withdrawal of the manual operating lever, which requires a large amount of force against the wire spring, can be avoided. The effect is that it can be performed reliably and easily without any impact.

[Brief explanation of the drawing]

Fig. 1 is the same plan view as Fig. 10 showing an embodiment of this invention, Fig. 2 is a partially enlarged view of Fig. 1 seen from the left, Fig. 3 is a sectional view taken along the line - in Fig. 2, 4
The figure is a partial side view of the manual operation rod, Figure 5 is a plan view of the wire spring, Figure 6 is a side view showing the connected state of the conventional device, Figure 7 is a side view showing the disconnected state, and Figure 8 is the side view of the wire spring. Figure 9 is a cross-sectional view along line - in Figure 8, Figure 10 is the same view as Figure 8 in the connected state, Figure 11 is a cross-sectional view along line XI-XI in Figure 10. FIG. In the figure, 1 is a closed switchboard, 2 is a primary terminal,
3 is a drawer type circuit breaker, 4 is a primary connector, 5a
is a fixed frame, 5b is a movable frame, 6 is a movable side secondary connector, 7 is a secondary connector 11 is a manual operation rod, 12 is a front hole, 14 is a slit, 15 is a wire spring, 15a, 15a are chevron-shaped protrusions, 16 is a pin,
17 is a shaft, 18 is a manual operation lever, and 20 is a recess. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] A secondary connector that connects a control circuit of a drawer-type circuit breaker housed in a closed switchboard and a control circuit of the closed switchboard is capable of disconnecting and disconnecting the primary connector when the circuit breaker is inserted or removed. A closed switchboard device that is automatically disconnected and connected when connected, and that can manually connect the secondary connector at the pulled-out position of the circuit breaker, comprising: a fixed frame attached to the circuit breaker; a movable frame that is slidably attached to the frame and moves the movable side secondary connector between a disconnection position and a connection position; one end is connected to the movable frame and the other end protrudes forward from a front hole of the fixed frame; and a manual operation rod, wherein the manual operation rod is provided with a stopper spring that engages with the fixed frame to prevent it from moving in the axial direction, and the manual operation rod operates the movable side secondary connector. When the spring is pushed in, the spring passes through the front hole against the spring force, and in the connected state, the spring force engages the fixing frame, and the stopper spring is inserted between both sides of the U-shape. A substantially U-shaped wire spring having an outwardly facing chevron-shaped protrusion at each intermediate portion is provided, and a slit for inserting the wire spring is provided in the intermediate portion of the manual operation rod, and the wire spring is inserted into the slit. The folded portion of the letter shape is supported by a pin, and both ends of both sides of the U letter are held within the manual operation rod, so that both chevron-shaped protrusions of the wire spring can sink into the surface of the manual operation rod. A closed switchboard device, characterized in that it projects and further comprises a manual operating lever provided on the front surface of the fixed frame for final pushing in and initial pulling out of the manual operating rod.