JPS635380Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a shutter device for disconnecting contacts installed behind drawer-type electrical equipment housed in a switchboard.

This type of shutter device is provided to ensure safety when testing draw-out electrical equipment, and automatically intervenes between the disconnected main circuit contact points when the electrical equipment is pulled out to the test position. Therefore, it is important that the opening/closing operation is reliable, and it is desired that the opening/closing operation be performed smoothly, and that installation and adjustment within the switchboard be simple and inexpensive.

As a conventional shutter device of this type, the one shown in FIGS. 1 and 2, for example, is often used, and both figures show a state in which a drawer-type electric device 1 is pulled out to a test position in a switchboard 2. There is. In the figure, a device-side contactor 3a constituting a three-phase disconnection contact part 3 is attached to the back of the drawer-type electrical device 1, and a partition wall 4 provided at the back of the switchboard 2 from the front A panel-side contactor 3b of the disconnection contact portion 3 is attached to face the device-side contactor 3a and to be in contact with and separate from it, and the panel-side contactor 3b is connected to a power source, etc., although not shown. The front surface side of the panel side contactor 3b is attached to the panel side contactor 3 by reciprocating motion in the vertical direction.
A shutter 5 is attached to open or close the front surface of the partition wall 4.
, an interlocking rod 7 supported vertically freely through upper and lower guide holes 6a provided in each guide 6, and a shutter plate attached to bridge the left and right interlocking rods 7. 8, an operating rod 9 with one end rotatably supported on each of the left and right inner walls of the switchboard 2, and lower edges of the left and right operating rods 9 rotatably attached to both sides of the electrical equipment 1, respectively. The pin 11 connects the long hole 9a provided at the other end of the left and right operating rods 9 to the lower end of the interlocking rod 7. The operation of the shutter plate 8 is such that when the electrical equipment 1 is in the testing position, it closes the front surface of the panel side contactor 3b by its own weight, and in the process of moving from the testing position to the operating position, the operating rod 9 is pushed up by the roller 10. When the electrical equipment 1 reaches the operating position indicated by the chain line, it is pushed up until the disconnection contact portion 3 can be closed. However, in the case of this configuration, as is clear from the figure, the opening/closing operation of the shutter plate 8 as the electrical equipment 1 moves requires the rollers 10 attached to both sides of the electrical equipment 1 and the switch board because the shutter board has no width. This is achieved by the vertical movement of the operating rod 9 that is pivotally supported on both the left and right inner walls of the control rod 2, and the interlocking rod 7 that is connected to the tip of the operating rod 9. It is necessary to operate the left and right members uniformly. In order to perform this uniform operation, the left and right rollers 10
It is important that the engagement with the operating rod 9 is carried out at the same time, and since this is an engagement between two parts that are attached to each other as described above, it is troublesome to adjust the engagement. It takes time, and the left and right interlocking rods 7 have two guide holes 6 each.
Since it is supported by a, it is troublesome and time consuming to adjust it so that it slides uniformly, and this has the drawback of increasing the cost of the entire switchboard, so improvements have been desired. .

The object of this invention is to eliminate the above-mentioned conventional drawbacks and to provide a shutter device for a disconnection contact part for a drawer-type electric appliance, which is easy to install and adjust, and whose opening/closing operations are performed reliably and smoothly.

According to this invention, the above purpose consists of a disconnection contact for a drawer-type electrical device that is taken in and out of the panel, and a disconnection contact on the panel side that is provided in the panel so that it can be approached and separated from the disconnection contact. A disconnection contact part and a shutter plate that opens and closes the front surface of the disconnection contact on the panel side of the disconnection contact part in accordance with the insertion and removal of the drawer-type electrical equipment in and out of the panel, wherein each of the disconnection contacts is vertically connected to one side. They are arranged in rows and offset to one side from the center in the left-right direction of the board, a rail is provided horizontally above the disconnection contact on the board side, and the rolling element assembly is horizontally movable on this rail. A vertically elongated shutter plate covering the front surface of the panel-side disconnection contactor is suspended from the rolling element assembly, and a spring is provided to constantly bias the rolling element assembly in the closing direction of the shutter plate, and a spring is provided at one end. is connected to the rolling element assembly,
By providing a drive rod whose other end is rotatably fixed to the side wall of the panel and which is pressed by the drawer-type electric device inserted into the panel to drive the rotor assembly in the direction in which the shutter plate is opened. achieved.

Examples of this invention will be described below based on the drawings. In FIGS. 3 to 5, parts having the same functions as those of the conventional device shown in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted, and only the different parts will be explained. First, the difference from the conventional device is that the three-phase disconnection contact part 3 is arranged vertically and offset to one side of the left and right sides of the panel, and the shutter 12 is configured vertically and can be moved in the horizontal direction. The front side of the panel-side contactor 3b of the disconnection contact portion 3 disposed in the disconnection contact portion 3 is provided so as to be opened or closed. The shutter 12 is guided by a guide rail 13 with a rectangular cross section that is installed horizontally above the board-side contactor 3b of the partition wall 4. It is movably guided and supported by the mover assembly 14 along the guide rail, and the lower edge of the shutter plate 8 is deflected in the front and rear direction by a guide groove 15 with a U-shaped cross section provided so as to sandwich the lower edge of the shutter plate 8. is regulated. The shutter moving mechanism is the rolling element assembly 1.
One end of the spring 16 is movably connected to an operating pin 14a which acts as a driving part provided on the rolling element assembly 14, and the other end is movably connected to a spring 16 which acts on the shutter plate 8 to always bias the shutter plate 8 in the closing direction. It is composed of one drive rod 17 rotatably supported on the side inner wall. The rotor assembly 14 consists of two mounting plates 14b which are suspended by holding the upper edge of the shutter plate 8, and two mounting plates 14b which are hung by holding the upper edge of the shutter plate 8.
It is comprised of four cylindrical rollers 14c rotatably supported by a mounting plate 14b so as to vertically sandwich a guide rail 13 inserted between the rollers 14b. In the above configuration, the shutter plate 8 is connected to the spring 1 when the electrical equipment 1 is in the test position (the state shown in the figure).
The front surface of the panel side contactor 3b is closed by the spring force of 6, and the driving rod 17 is pressed in the direction of arrow A by the side of the electrical equipment 1 during the movement from the test position to the operating position, and this pressing At the same time, the rolling element assembly 14 is moved on the guide rail 13 in the opening direction of the shutter plate via the operation pin 14a that engages with a long hole provided at one end of the drive rod 17, and the electrical equipment 1 is moved. The shutter plate 8 is moved so that the disconnecting contact portion 3 can be closed before reaching the operating position shown by the chain line. In this configuration, the shutter plate 8
Since the shutter plate 8 is vertically long and wide, the opening/closing operation of the shutter plate 8 as the electrical equipment 1 moves presses one drive rod connected to the rolling element assembly on one side of the electrical equipment 1. Moreover, since all the members constituting the shutter device are attached to the power distribution board 2 side, installation and adjustment of the shutter device is easy. Since it has been lowered,
Although the shutter device is driven only on one side, it operates reliably and smoothly. In this embodiment, the rolling element assembly 14 is composed of four cylindrical rollers 14c, but the shutter may be suspended only by the upper cylindrical roller. It may be a sliding surface as long as the shutter can move smoothly in the horizontal direction. In addition, since the disconnection contact part is provided offset from the center to one side, the distance between the disconnection contact part and the shutter plate when opened can be increased without increasing the width of the board. can be made smaller.

Therefore, according to this invention, it is possible to obtain a shutter device in which the shutter operates reliably and smoothly, has a simple structure, and is easy to adjust when installed on the panel, and which uses the same mechanism even if the electrical equipment is different. It can contribute to reducing the cost of the board.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the essential parts of an example of a conventional shutter device for a disconnection contact part for draw-out electrical equipment;
FIG. 3 is a plan view of essential parts of an embodiment of a shutter device for a disconnection contact part for a drawer-type electric appliance according to this invention, FIG. 4 is a side view of FIG. 3, and FIG. It is an enlarged view of the figure seen from the B arrow direction. 1...Drawer-type electrical equipment, 2...Switchboard, 3...
Disconnection contact part, 3a... device side contact, 3b... panel side contact, 8... shutter plate, 12... shutter,
13... Guide rail, 14... Roller assembly, 1
4a... Operating pin, 14c... Cylindrical roller, 1
6... Spring, 17... Drive rod.

Claims (1)

[Scope of utility model registration request] A disconnection contact part consisting of a disconnection contact of a drawer-type electrical device that is taken in and taken out of the panel, and a disconnection contact on the panel side that is provided in the panel so that it can be brought into contact with and separated from it, and the disconnection contact part of this disconnection contact part. In the device having a shutter plate that opens and closes the front surface of the disconnection contact on the panel side in accordance with the insertion and removal of the drawer-type electrical equipment into and out of the panel, the disconnection contact for each phase on the equipment side and the panel side of the disconnection contact part is connected respectively. They are arranged vertically in a row and offset from the center in the left-right direction of the panel to one side, and a rail is provided horizontally above the disconnection contact on the panel side, and on this rail, the disconnecting contacts can be moved horizontally. Install the moving assembly,
A vertically long shutter plate that covers the front surface of the panel-side disconnection contactor is suspended from the rotor assembly, and a spring is provided that constantly biases the rotor assembly in the closing direction of the shutter plate. It is connected to the rotor assembly, the other end is rotatably fixed to the side wall of the panel, and is pressed by the drawer-type electrical equipment inserted into the panel to open the shutter plate. 1. A shutter device for a disconnection contact part of a draw-out type electric device, characterized in that it is provided with a drive rod that drives horizontally in the direction.