JPH0340014Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a drawer-type switchgear, and in particular to an improvement of a drawer-type switchgear equipped with an interlock from safety considerations.

[Prior Art] Generally, a high voltage is applied to a drawer-type switchgear, and various interlock means are taken for safety reasons.

As one of them, the door interlock of the present invention has a drawer-type opening/closing device installed in a storage panel, and is structured so that 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 high voltage is applied on the drawer side and there is no door interlock, or if the main body is stored using the control circuit, if you approach the coupler terminal of the drawer, the main body An arc may occur between the terminals of the terminal, leading to equipment destruction or personal injury.

To prevent this from occurring, door interlocks are generally provided by electrical or mechanical means.

However, the former method suffers from poor reliability, such as contact failure of the limit switch or power outage of the control circuit.

Furthermore, in the latter case, a link pin or the like is used to connect the direction of movement of the door to the operation prevention, which tends to make the device complicated and large.

Comparing these two methods, each has its advantages and disadvantages, but mechanical means at least do not require electricity, so there are no poor connections or power outages in the control circuit, and in this respect it is better than electrical means. It's excellent.

[Problem that the invention attempts to solve]

However, as mentioned above, devices tend to become more complex and larger, and there are various problems in housing them in a storage board with a limited area.

The present invention was devised in view of the above-mentioned problems, and its purpose is to provide an interlock device for a drawer-type opening/closing device that simplifies and downsizes the interlock device. .

[Means for solving problems]

The means for achieving that purpose are a guide case 5, a pin 10, and a blocking pin 11.
and a rotary plate 12, and is an interlock device for a drawer-type opening/closing device when the door 3 is closed by a handle for putting in and taking out, and the guide case 5 pops out when the door 3 is open and when the door 3 is closed. A push rod 6 for the door 3 that is retracted when the door 3 is closed, and a guide hole 5a bent in the same direction as the movement direction of the push rod 6 and having a substantially V-shape are provided. The blocking pin 11 is a slidable member to which the pin 10 is fixed, and the rotary plate 12 has a handle for putting in and taking out, and the rotating plate 12 has a handle for putting in and taking out. When the pin 10 is in the inclined position of the guide hole 5a and the blocking pin 11 is protruding, the drawer-type opening/closing device is prevented from moving, and when it is not in the inclined position and is not protruding, the pull-out opening/closing device is allowed to move.

Next, the operation of the interlock device constructed as above will be explained.

[Effect]

The main function of the interlock device of this invention is:
The purpose is to transmit the action in the Y-axis direction to the X-axis direction.

As described above, this means is carried out by using the V-shaped guide hole bored in the guide case. That is, when one side of the F-shape is located in the front-rear direction of the guide plate, on the Y-axis side, the other side is bent diagonally at a predetermined angle with respect to the X-axis.

A door push rod is fixed to the guide case, which acts when the door is opened and closed, and the guide case moves forward and backward in the Y-axis direction when the door is opened and closed.

In the action of such a guide case and blocking pin, when the door is closed, the pin is located on the Y-axis side of the F-shape, so the blocking pin is retracted and the rotary plate can rotate. . This allows the body to be pulled out from the pull-out device in a safe state with the door closed.

On the other hand, when the door is open, the pin is located at the bent end of the V-shape, so the blocking pin protrudes and obstructs rotation of the rotary plate. Therefore, it is impossible to store the main body in the drawer with the door open.

Hereinafter, one embodiment of the interlock device of the present invention will be described in detail with reference to the drawings.

〔Example〕

Fig. 1 is an overall schematic configuration diagram showing one embodiment of the drawer type opening/closing device of the present invention, Fig. 2 is an explanatory diagram of the interlock device when the door is closed, and Fig. 3 is an illustration of the interlock device when the door is open. This is an explanation of the interlock device.

In FIG. 1, the drawer-type opening/closing device has a main body 2 stored in a drawer device 1, and these items are attached to a door 3.
It is installed on a storage panel 4 equipped with a.

Guide case 5 of the interlock device of the present invention
is provided in the drawer device on the back side of the door. A door push rod 6 is attached to the front of the guide case 5, and a rod 7 is attached to the rear as well. Then, as shown in Fig. 2, a spring 8 is attached to the rod 7.
is provided, and when the door 3 is opened, the push rod 6 jumps out to the door side by the action of the spring 8, and the door 3 is opened.
The push rod 6 and the rod 7 are supported by a metal fitting 9 so that the push rod 6 can be retracted when the door is closed. Furthermore, a guide hole 5a in the shape of a square is bored in the upper and lower parts of the guide case 5, and one side a of the square shape is in the Y-axis direction, that is, parallel to the push rod 6, and the other side b is in the X-axis direction. It is formed in a direction bent at a predetermined angle. A pin 10 is movably provided in the guide hole 5a, and the pin 10 is fixed to a blocking pin 11 which is disposed so as to be movable in a direction perpendicular to the Y-axis direction of the guide case 5. Further, when the guide case 5 is moved to release the blockage of the blocking pin 11 and the main body 2 is pulled out from the drawer device 1, the drawer device is provided with a rotary plate 12 that rotates as the guide case 5 moves.

Here, 13 is a coupler terminal provided on the drawer 1, 14 is a terminal provided on the main body 2, 15,
Reference numeral 16 represents a connecting fitting that transmits the movement of the main body 2 to the rotary plate 12, and reference numeral 17 represents a bearing that supports the blocking pin 11 so that it can move forward and backward. Note that the rotating plate 12
Although a handle for taking in and taking out the main body 2 is provided, illustration and explanation thereof are omitted because they are not directly related to the present invention.

Next, the interlock device of the present invention constructed as described above will be explained with reference to FIGS. 2 and 3.

First of all, the functions of the door interlock can be broadly classified as follows.

B. When the drawer type opening/closing device is operating (referred to as operating position) The interlock is stuck and the door 3 of the storage panel 4 cannot be opened.

(b) When the coupler terminal 13 of the drawer device 1 of the drawer-type opening/closing device and the terminal 14 of the main body 2 are open (referred to as the disconnection position). The interlock is released and the door 3
state in which it can be opened.

C. When moving from the disconnection position to the operating position: If the door 3 is not closed, the interlock will become stuck and the main body 2 cannot be stored in the drawer 1.

In an interlock device having such a function, FIG. 1 shows the operating position, and details of the interlock device are shown in FIG. 2.

In other words, to explain the state of each part that is interlocked, since door 3 is closed,
The push rod 6 is retracted and the guide case 5 is also in a similar state. On the other hand, the pin 10 is
It is located on one side of the axis, so that the blocking pin 11 is in a retracted state. At this time, the rotary plate 12 is in a freely rotatable state, and the spring 8 is compressed.

When moving from such a state to the disconnection position shown in FIG. 3, open the main body 2 with the door 3 closed.
After turning off the power to the control circuit and disconnecting the main circuit of the high-voltage system, and confirming the disconnection using a lamp etc., operate the handle for putting in and taking out the main body 1 from the front of the door, and move the main body 2 from the pull-out device 1 to the disconnected position. Pull it out. At this time, since the interlock device is provided on the drawing device side, the push rod 6 is in a retracted state. Then, when you open door 3,
The push rod 6 is pushed forward by the spring 8, and the blocking pin 11 is also pushed out.

At the disconnection position made in this way,
The pin 10 moves to the end of the other curved side b of the guide hole 5a, and the blocking pin 11 protrudes and locks the rotating plate 1.
It prevents the rotation of 2.

Next, when moving from the disconnection position to the operating position, the door 3 is closed.

When the rotary plate 12 is rotated in the direction of arrow A using the handle for loading and unloading, the main body 2 is housed in the drawer device 1 by the connecting fittings 15 and 16 shown in FIG. After that, the control circuit power is turned on and the main circuit is made conductive.

The interlock device constructed in this manner does not require a large space and can be easily attached to an existing drawer-type opening/closing device.

[Effect of idea]

As explained above, according to the present invention, the action in the Y-axis direction can be transmitted in the X-axis direction through the guide hole 5a drilled in a V-shape. Because it has a simple structure that does not require any complicated elements, it is easy to assemble and install, and even if you accidentally try to store the main unit 2 without closing the door,
Since it is obstructed by the blocking pin 11, there is no possibility of damage to the equipment or injury to persons. Furthermore, it has also become possible to downsize, which was one of the original objectives.

Therefore, the interlock device for a drawer-type opening/closing device of the present invention is extremely useful in practice.

[Brief explanation of the drawing]

Figure 1 is an overall schematic diagram showing an embodiment of the drawer type opening/closing device of the present invention, Figure 2 is an explanatory diagram of the interlock device when the door is closed, and Figure 3 is when the door is open. FIG. 2 is an explanatory diagram of an interlock device. 1...Drawer device, 2...Main body, 3...Door,
5... Guide case, 6... Tail pusher, 10... Pin, 11... Blocking pin, 12... Rotating plate, 5a...
...Guide hole.

Claims (1)

[Claims for Utility Model Registration] Guide case 5, pin 10, and blocking pin 11
The guide case 5 is an interlock device for a drawer-type opening/closing device, which has a rotary plate 12 and a rotating plate 12, and can move the drawer opening/closing device to a connected position and a disconnected position with the door 3 closed by a handle for loading and unloading. A push rod 6 for the door 3 that protrudes when the door 3 is open and retracts when the door 3 is closed, and a substantially V-shaped guide hole 5a bent in the same direction as the moving direction of the push rod 6 are provided. The pin 10 is the one that engages with the guide hole 5a of the guide case 5, the blocking pin 11 is a slidable one to which the pin 10 is fixed, and the rotary plate 12 is for loading and unloading. It has a handle, and when the pin 10 is in the inclined position of the guide hole 5a and the blocking pin 11 is protruding, the movement of the drawer-type opening/closing device is blocked by rotation of this handle for putting in and taking out, and the movement of the drawer type opening/closing device is prevented when the pin 10 is in the inclined position of the guide hole 5a and is not protruded. It made it possible to move around. Interlock device for drawer type opening/closing equipment.