JPH079526Y2 - Interlock device for drawer type switchgear - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a drawer switchgear, and more particularly to improvement of a drawer type switchgear equipped with an interlock in consideration of safety. [Prior Art] Generally, a high voltage is applied to a drawer-type switchgear, and various interlocking means are taken as a safety measure. As one of them, the door interlock of the present invention has a drawer type opening / closing device installed on the storage board, and the main body cannot be stored in the drawer when the door is open. This means that if there is a coupler terminal to which a high voltage is applied on the drawer side and there is no door interlock, or if the control circuit is used to store the main body, it will become close to the main body if it comes close to the coupler terminal of the drawer. An arc may be generated between the terminals, resulting in damage to the equipment or personal injury. To prevent this from happening, door interlocks are generally provided by electrical or mechanical means. However, in the former method, there are some places where reliability is poor, such as a contact failure of the limit switch or a power failure of the control circuit. Further, in the latter case, since a link pin or the like is used to connect the movement direction of the door to the operation prevention, there is a tendency that the device becomes complicated and becomes large in size. Comparing these two, each has advantages and disadvantages, but mechanical means do not require at least electricity, so there is no contact failure and no power failure of the control circuit, which is superior to electrical means. ing. [Problems to be Solved by the Invention] However, as described above, the device tends to be complicated and large in size, and there are various problems with respect to storing the device in a storage board having a limited area. The present invention was created in view of the above-mentioned problems, and an object thereof is to provide an interlock device for a drawer-type switchgear that simplifies and downsizes the interlock device. [Means for Solving the Problem] The means for achieving the purpose are the rod 7 and the blocking pin 11.
An interlock device for a drawer-type switchgear which has a rotating plate 12, and can move the drawer-type switchgear to a connecting position and a disconnecting position in a state where the door 3 is closed by a handle for loading and unloading. A push rod 6 for the door 3 that pops out when the door 3 is open and retracts when the door 3 is closed is provided on one side, and is formed in a substantially V shape bent from the same direction as the moving direction of the push rod 6, Blocking pin 11
Is a slidable member provided with a V-shaped portion 7a of the rod 7 which is provided with a guide 11a acting in a V shape for opening and closing the door 3, and the rotary plate 12 has a handle for taking in and out,
The guide pin 11a is rotated by rotating the handle for taking in and out.
Is at the inclined position of the V-shaped portion 7a, and the blocking pin 1
When 1 is protruding, it prevents the drawer type switchgear from moving,
This allows movement when not in a tilted position and not protruding. Next, the operation of the interlock device configured as above will be described. [Operation] The main action of the interlock device of the present invention is to transmit the action in the Y-axis direction in the X-axis direction. As described above, as described above, the V-shaped portion 7a provided on the rod 7 is used. That is, when the V-shaped portion 7a is in the front-rear direction of the rod 7 and on the Y-axis side, the other side is bent at an angle to the X-axis at a predetermined angle. A push rod 6 for a door, which operates by opening and closing the door 3, is fixed to the rod 7, and when the door 3 is opened and closed, the rod 7 moves back and forth in the Y-axis direction. Guide 1 accordingly
1a moves the V-shaped portion 7a in a V shape, and the blocking pin 11 moves in the X-axis direction so as to be able to move back and forth. Such stick 7
Further, in the action of the blocking pin 11, since the guide 11a is positioned on the Y-axis side of the V shape when the door 3 is closed, the blocking pin 11 is retracted and the rotary plate is rotatable. This makes it possible to pull out the main body from the pulling device in a safe state in which the door 3 is closed. on the other hand,
When the door is opened, the guide 11a is located at the bent end portion of the V shape, so that the blocking pin 11 projects and blocks the rotation of the rotary plate. Therefore, it becomes impossible to store the main body in the drawer with the door open. Hereinafter, an embodiment of the interlock device of the present invention will be described in detail with reference to the drawings. [Examples] FIG. 1 is an overall schematic configuration diagram showing an example of the drawer type switchgear of the present invention, and FIG. 2 is an explanatory view of an interlock device when the door showing the main part of the present invention is opened. Is. First
In the drawing, the drawer opening / closing device has a main body 2 housed in a drawer device 1, and these are installed on a storage board 4 equipped with a door 3. The interlock device of the present invention has a rod 7, a blocking pin 11, and a rotary plate 12, and is a pull-out type that can move a pull-out type switchgear to a connecting position or a disconnecting position with a door 3 closed by a pull-in / out handle. An interlock device for a switchgear, in which a rod 7 pops out when the door 3 is open and retracts when the door 3 is closed.
The push pin 6 is provided on one side and is formed in a substantially V shape bent from the same direction as the moving direction of the push rod 6, and the blocking pin 11 is formed on the V shaped portion 7 a of the V rod 7. It is a slidable member provided with a guide 11a that acts in a dogleg shape for opening and closing the door 3, and the rotating plate 12 has a handle for taking in and out, and the guide pin 11a is rotated by rotating the handle for taking in and out. When the blocking pin 11 is in the inclined position of the V-shaped portion 7a and the blocking pin 11 is projecting, the drawer type switchgear is prevented from moving, and when it is not in the projecting position and is not projecting, it is possible to move. Here, 13 is a coupler terminal provided in the drawing device 1, 14 is a terminal provided in the main body 2, 15 and 16 are connecting fittings for transmitting the movement of the main body 2 to the rotating plate, and 17 is the blocking pin 11 which can be moved forward and backward. It is a bearing that supports so that it can operate. Although the rotating plate 12 is provided with a handle for taking in and out the main body 2, its illustration and description are omitted because it is not directly related to the present invention. next,
An interlock device of the present invention constructed as described above will be described with reference to FIG. First of all, the functions of the door interlock are roughly classified as follows. A) When the drawer-type switchgear is in operation (referred to as operating position) The door 3 of the storage cabinet 4 cannot be opened due to the interlock. (B) When the coupler terminal 13 of the drawer device 1 of the drawer type switchgear and the terminal 14 of the main body 2 are opened (referred to as a disconnection position), the interlock is released and the door 3 can be opened. C) If the door 3 is not closed when shifting from the disconnection position to the driving position, the interlock is applied and the main body 2 cannot be stored in the drawer 1. In the interlock device having such a function, FIG. 1 shows an operating position. That is, referring to FIG. 2 in which the interlock is not applied, in the state of each part which is interlocked, since the door 3 is closed, the push rod 6 is retracted, and the rod 7 is also in the same state. . On the other hand, the guide 11a is located on one side a of the rod 7 on the Y-axis, so that the blocking pin 11 is retracted. At this time, the rotary plate 12 is rotatable and the spring 8 is compressed. When shifting from such a state to the disconnection position shown in FIG. 2, with the door 3 closed, the power supply of the control circuit of the main body 2 is cut off to disconnect the main circuit of the high voltage system and disconnect the lamp. After confirmation, the main body 2 is pulled out from the pull-out device 1 to the disconnection position by operating from the front of the door with the above-mentioned handle for pulling out the main body 1. At this time, since the interlock device is provided on the drawer device side, the push rod 6 is in a retracted state. Then, when the door 3 is opened, the push rod 6 pops out forward by the spring 8 and the blocking pin 11 also pops out.
At the disconnection position thus performed, the guide 1
1a moves to the position of the V-shaped portion 7a, and the blocking pin 1
Reference numeral 1 projects to prevent rotation of the rotary plate 12. next,
When shifting from the disconnection position to the driving position, the door 3 is closed. Then, when the rotating plate 12 is rotated in the direction of arrow A by the handle for taking in and out, the connecting fitting 15, shown in FIG.
The main body 2 is housed in the drawer 1 by 16. Then, the control circuit power is turned on to bring the main circuit into conduction. In this way, the interlock device configured as described above does not require a large space and can be easily attached to the existing drawer-type switchgear. [Effect of the Invention] As described above, according to the present invention, the action in the Y-axis direction is
Since it can be transmitted in the X-axis direction by the rod 7 that is bent in a V shape, it does not require complicated elements such as a link mechanism that has been used in the past, and has a simple structure so that it can be easily assembled. , It can be installed, and even if I accidentally want to store the main body 2 without closing the door 3,
Since it is blocked by the blocking pin 11, there is no possibility of damaging the device or causing personal injury. further,
It was also possible to reduce the size, which was one of the original purposes. Therefore, the interlock device of the drawer type switchgear of the present invention is
It is extremely useful in practical use.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall schematic configuration view showing an embodiment of a drawer-type switchgear of the present invention, and FIG. 2 is an interlock device when the door is open showing the main part of the present invention. Explanatory drawing of. 1 ... drawing device, 2 ... main body, 3 ... door, 6 ... push rod, 7 ... rod, 11 ... blocking pin, 12 ... rotating plate, 7
Letter-shaped part to a ……, 11a …… Guide.

Claims (1)

[Claims for utility model registration] Having a rod (7), a blocking pin (11), and a rotating plate (12), a drawer type switchgear is connected with the door (3) closed by a handle for taking in and out. An interlock device for a drawer type switchgear capable of moving to a position or a disconnection position, wherein the rod (7) pops out when the door (3) is open,
Push rod (6) for door (3) retracting when closed
Is provided on one side and is formed in a substantially V-shape bent from the same direction as the moving direction of the push rod (6), and the blocking pin (11) is a V-shaped portion of the rod (7). 7a is a slidable member provided with a guide 11a acting in a dogleg shape for opening and closing the door (3). The rotary plate (12) has a handle for taking in and out. By rotation, when the guide pin 11a is in the inclined position of the V-shaped portion 7a and the blocking pin (11) is protruding, the movement of the drawer-type switchgear is blocked, and when it is not in the inclined position, it can be moved. An interlock device for drawer-type switchgear that is made up of