JPS6019460Y2 - Closed switchboard interlock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an interlock device for a drawer-type closed switchboard.

As shown in Figure 1 of the attached drawings, a conventional drawer-type closed switchboard has a frame body 1 with double doors or double double doors 2 on the front thereof, and a trolley 3 attached to each door inside the frame body 1. It is provided so that it can be pulled out using wheels 4.

Further, the built-in device 5 placed on the trolley 3 is provided with a protective cover 6 on the trolley 3 to prevent danger caused by a human body or the like touching the built-in device 5 when the power supply side is being charged. They are screwed together, and the temperature of the liquid between the built-in device 5 and the external power source when the trolley 3 is moved is controlled by the temperature of the main circuit connector 7, for example, the main circuit junction.

The carriage 3 is moved by a handle 9 provided on a decorative panel 8 provided on the front surface thereof.

Since the conventional device is configured in this way, the built-in equipment 5
When inspecting, etc., first pull out the trolley 3 completely to the position where the main circuit connector 7 is disconnected, that is, to the position A indicated by the dashed line, then open the door 2 and remove the protective cover 6 from its screws. The lock is released, removed, and inspected.

However, in this conventional device, the trolley 3
If you do not install the protective cover 6 or forget to install it because there is no interlock device for safety between the protective cover 6 or the door 2, the built-in device 5 may By opening the door 2 while the battery is in a charged state, or by moving the trolley 3 to the position where the main circuit connector 7 is connected with the door 2 open,
The built-in device 5 was charged by the power source, and therefore there was a risk of accidental electric shock.

The object of the present invention is to provide an interlock device for a closed switchboard that eliminates such conventional drawbacks.

Hereinafter, the present invention will be explained based on the accompanying drawings showing one embodiment thereof.

In FIGS. 2 to 5, when the trolley 3 is placed in the position where the main circuit connector 7 is connected and the power supply side is charged, the trolley 3 is located behind the decorative panel 8 and the door is closed. A protrusion 11 is provided at the bottom of the door 2 to prevent the door 2 from rotating.

Furthermore, when the trolley 3 is pulled out and the main circuit connector 7 is disconnected so that the power supply side is not charged, the part of the decorative panel 8 on the movement trajectory of the protrusion 11 due to the opening and closing of the door 2 A notch 12 is formed through which the protrusion 11 can pass.

That is, the relationship between the decorative panel 8 and the protrusion 11 is as follows.
In the state shown in the figure, that is, in the state in which the trolley 3 is placed and the power supply side is charged, the decorative panel 8 and the protrusion 1
1 and the door 2 cannot be rotated in the direction of arrow B, and in the state shown in FIG. The notches 12 of 8 and the loci of movement of the protrusions 11 overlap, and therefore, the door 2 is arranged such that the protrusions 11 can pass through the notches 12 and rotate.

Note that the structure other than the above is the same as that of the conventional device.

The present invention is constructed as described above, and its operation and effects will be explained next.

In the device of the present invention, when inspecting the built-in equipment 5 placed on the trolley 3, first move the trolley 3 by the handle 9.
As shown in FIG. 4, the protrusion 11 provided on the door 2 will It is caught on the decorative panel 8 attached to the trolley 3 and cannot be rotated in the direction of arrow B.

In addition, when opening the door 2, pull out the trolley 3 and wait until after the power supply side of the built-in device 5 has released the charge.
When the door 2 is rotated after being in the state A shown in the figure or the state shown in FIG. , the notch 12 of the decorative panel 8 overlaps the moving trajectory C of the protrusion 11, and therefore the protrusion 11 passes through the slit 12 and opens the door 2 as it is, so the door is closed. 2 is opened, the power supply side of the built-in device 5 is not already being charged.

In addition, to prevent the danger of the trolley 3 while the door 2 is open, there is a mechanism installed near the hinge of the door 2 that moves in and out in conjunction with the opening and closing of the door 2, and when the trolley 3 is pulled out. The rotating piece or protruding piece that locks the truck 3 to the frame body 1 allows the truck 3 to enter the vehicle while the door 2 is open.

Furthermore, although the present embodiment has been described with respect to the protrusion provided directly or indirectly fixed to the door 2, the opening of the door 2 and the insertion of the trolley 3 while the door 2 is open are limited to the drawer of the trolley 3 and the main The protrusion can also be configured to be moved in and out by means of a linking device or an electromagnetic device, as is only possible by disconnecting the circuit connector.

The present invention is constructed as described above, and unless the trolley is pulled out and the main circuit connector is disconnected, the protrusion attached to the door gets caught on the decorative panel and the door cannot be opened. When the main circuit connector is disconnected, the protrusion is configured so that the door can be opened through the cutout in the decorative panel, even if the protective cover is not installed or is not installed. This has the effect of providing an interlock device for a closed switchboard that can completely eliminate the risk of accidental electric shock due to opening the door 2 while the built-in device is being charged, even if the device is forgotten.

[Brief explanation of drawings]

Fig. 1 is a right side sectional explanatory view of a conventional drawer-type closed switchboard, Fig. 2 is a front view of an embodiment of the present invention, Fig. 3 is a right side sectional explanatory view thereof, and Fig. 4 is an explanatory view of the right side of Fig. 3. FIG. 5 is a cross-sectional view taken along the line IV--IV of the cart in its extended state, and FIG. 5 is a cross-sectional view of the cart in its pulled-out state. 1...Frame body, 2...Door, 3
...Truck, 4...Wheels, 5...
・Built-in equipment, 6...Protective cover, 7...
・Main circuit connector, 8... Decorative panel, 9...
...Handle, 11...Protrusion, 12...
...Notch, A...Dolly 3 (built-in equipment 5 and protective cover 6) pulled out, B...Turning direction of door 2, C...Protrusion Movement trajectory of part 11,
D...Door 2 is open.

Claims (1)

[Scope of utility model registration request] Built-in equipment loaded on a removable trolley is pushed into and pulled out of the frame body of the trolley, and the main circuit connector connected to the external power supply is heated, and the front side of the frame body shields the built-in equipment. Or a door with double doors on one side,
In addition, in a drawer-type closed switchboard in which a decorative panel is provided on the front of the cart, a protruding portion that is arranged to protrude to the back from the decorative panel is provided directly or indirectly on the door, and the decorative panel is , at the position of the trolley where the built-in equipment is connected to the main circuit connector, there is a decorative panel on the movement trajectory of the protrusion due to opening and closing of the door, and where the built-in equipment is disconnected from the main circuit connector. An interlock device for a closed switchboard, characterized in that at the position, a notch is formed on the locus of movement of the protrusion through which the protrusion can pass.