JPS6349042Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a shutter device that operates in conjunction with drawer-type electrical equipment in a closed switchboard to open and close a connection port to an electric circuit in the electrical equipment panel.

This type of shutter device works in conjunction with electrical equipment to reliably open and close the connection port, and when closed, the gap between the opening and closing is as small as possible to prevent dust and foreign matter from entering, and it is easy to install, adjust, and maintain, and is safe. It is desirable to be a thing.

[Prior art and its problems]

FIG. 7 is a perspective side view of a drawer-type electrical device in a closed switchboard having a conventional shutter device. In the figure, reference numeral 1 denotes a drawer-type electrical device that is mounted on a moving trolley 2, moves over the ceiling of a switchboard 3, and is taken in and out of an equipment room 4. A connection port 6 through which the connection contact 5 of the electrical equipment 1 passes is provided in the switchboard partition wall 3a in the equipment room 4, and a fixed contact 7 is provided at the back of the connection port 6 to connect the connection contact 5 to the electrical circuit inside the panel. It is being A shutter plate 8 is provided on the front surface of the connection port 6 to open and close the connection port in conjunction with the pulling in and out of the movable trolley 2.

FIG. 8 shows a side view of a conventional shutter device.
The shutter plate 8 is fixed via a mounting member 9 to an elevating rod 11 attached to a guide 10 attached to the panel side wall on the side of the connection port 6 so as to be slidable up and down. The lower end of the lifting rod 11 is pin-coupled to a drive lever 13 that rotates around a fulcrum 12 provided on the side wall. The base end of the driving lever 13 on the rotational fulcrum side is fixed to a lever 16 which is provided with a roller 14 at the tip and rotates around the fulcrum 12 when the roller 14 contacts a striker 15 provided on the movable cart 2. has been done. When the electric device 1 is pulled in, the drive lever 13 rotates, and the lifting rod 11 is pushed up and the shutter plate 8 is pushed up.
When the operator opens the front side of the connection port 6 and pulls out the electrical device 1, the shutter plate 8 descends under its own weight and closes the connection port 6.

With this structure, there is a limit to the distance the shutter plate can move, and the front of the connection port cannot be opened wide.When an electrical device is pulled in and the connection port is opened, the shutter plate comes close to the contacts of the electrical device. must be constructed with an insulating plate, which is expensive, and when the connection port is closed, there is a large space between the ports, which generates dust and
There is a risk that foreign objects may enter the switchboard, and the position of the shutter plate may shift due to slight deformation of the striker, so it takes time and effort to adjust the position.

[Purpose of invention]

The object of this invention is to provide a shutter device for drawer-type electrical equipment in a closed distribution board, which has a shutter plate made of a metal plate, which opens and closes the front of the connection port widely in conjunction with the drawer-type electrical equipment, which has a small gap when the connection port is closed, and which is easy to adjust.

[Key points of the idea]

This invention uses a drive lever that connects a shutter plate made of a metal plate with a bent edge on its outer periphery via a turnbuckle to a lever that rotates in contact with a striker installed on a movable trolley of a drawer-type electric machine. The purpose is to open and close the connection port by moving it largely, and when it is closed, the bent edge of the shutter plate engages with the bent edge provided on the connection port, so that the gap between them becomes small.

[Example of idea]

Next, embodiments of the present invention will be described below based on the drawings. FIG. 1 is a perspective side view of a drawer-type electric device in a closed switchboard having a shutter device according to an embodiment of the present invention, and the same parts are designated by the same reference numerals as in FIG. 7. The drawer-type electrical equipment 1 mounted on the movable trolley 2 moves on the ceiling of the switchboard 3 and is taken in and out of the equipment room 4, and the connection contacts 5 of the electrical equipment 1 penetrate the connection ports 6 provided in the partition wall 3a of the panel. It is adapted to be attached to and detached from a connecting bushing 17 which is connected to an electric circuit in the panel. On the front surface of the connection port 6, there is a shutter plate 18 that opens and closes the connection port 6 in conjunction with the drawer-type electrical equipment.
is provided.

2 is a side view of the shutter device according to the embodiment of the present invention, FIG. 3 is a front view taken along the line A-A in FIG. 2, FIG. 4 is a front view taken along the line B-B in FIG. 2, and FIG. The figures are a plan view taken along the line CC in FIG. 3, and FIG. 6 is a plan view taken along the line D-D in FIG. 3. A guide rod 19 is vertically attached to the side wall of the equipment room on the side of the connection port 6 provided in the partition wall 3a of the panel, and a bent edge 18 is attached to the outer periphery of the guide rod 19.
One side end of the metal shutter plate 18 provided with a is attached so that it can slide up and down, and the other side edge is sandwiched between a guide plate 21 attached to the side wall of the equipment room via a slide plate 20 and slid up and down. I'm starting to do that. The lower end of the shutter plate 18 and the partition wall 3a
A spring 23 is suspended between the latch 22 and the latch 22 attached to the upper part of the holder. The lower end of the shutter plate 18 is pin-coupled to a drive lever 25 that rotates around a fulcrum 24 provided on the side wall of the equipment room.
The proximal end of 5 is provided with a roller 27 that comes into contact with the striker 15 of the movable trolley 2 of the pull-out electric equipment via a turnbuckle 26, and is pin-coupled to a lever 29 that comes into contact with the striker and rotates around a fulcrum 28. ing. In addition, in order to keep the connection port 6 open by pushing down the shutter plate 18 during maintenance and inspection, a latch 31 that engages a pin 30 connected to the drive lever 25 at the lower end of the shutter plate 18 is rotated about a fulcrum 32. A connecting rod 33 is pin-coupled to a spring-loaded push rod 34 attached to the side wall of the equipment room entrance.

When the electrical equipment 1 is pulled into the equipment room 4, it comes into contact with the striker 15 of the trolley 2, and the drive lever 25 rotates via the lever 29 and turnbuckle 26, and the shutter plate 18 is pushed down against the spring 23. to open the connection port 6, and the connection contact 5 of the electrical device 1 passes through the connection port 6 and connects the connection bushing 17.
connected to. When the electric device 1 is pulled out, the shutter plate 18 is pulled up by the spring 23 and closes the connection port 6. At this time, the folded edge 18a of the shutter plate 18 meshes with the folded edge 6a of the connection port 6, so that the gap therebetween is minimized to satisfy the closed panel power distribution standard IPH3 of the IEC standard. A cushioning rubber 35 is attached to the folded edge of the upper end of the shutter plate 18.

When pulling out an electrical device and inspecting the inside of the connection port, push the drive lever 25 by hand to push down the shutter plate 18, and push the push rod 34, the latch 31 rotates around the fulcrum 32 and closes the pin at the lower end of the shutter plate 18. 30, the connection port 6 is kept open. When the electrical equipment is pulled in after inspection, the striker 15 will latch 31.
Since the projection 31a is kicked, the latch is released and the push rod 34 is returned to its original position by the spring. By providing the push rod 34 near the entrance of the equipment room 4, it is possible to easily operate it from outside the equipment room 4.

The present invention can be applied to a shutter device for a draw-out type circuit breaker.

[Effects of the invention] According to the invention, by interposing a turnbuckle in the shutter drive device, it becomes possible to move the shutter plate over a large distance. By providing a bent edge around it, the gap when the connection port is closed is minimized to prevent dust, foreign matter, etc. from entering, and the turnbuckle allows the position of the shutter plate to be adjusted. This has the effect of improving reliability, safety, and maintainability.

[Brief explanation of the drawing]

FIG. 1 is a perspective side view of a drawer-type electric device in a closed switchboard having a shutter device according to an embodiment of the present invention, and FIG. 2 is a side view of a shutter device according to an embodiment of the present invention.
FIG. 3 is a front view taken along the line A-A in FIG. 2, FIG. 4 is a front view taken along the line B-B in FIG. 2, and FIG.
6 is a plan view taken along the line D-D in FIG. 3, FIG. 7 is a transparent side view of a drawer-type electric device in a closed switchboard with a conventional shutter device, and FIG. 8 is a plan view taken along line D-D in FIG. FIG. 3 is a side view of the shutter device. 1...Drawer-type electrical equipment, 2...Moving trolley, 3...
...Switchboard, 4...Equipment room, 5...Connection contact, 6...Connection port, 15...Striker, 17...
...Connection bushing, 18...Shutter plate, 19...
... Guide rod, 20 ... Slide plate, 21 ... Guide plate, 22 ... Latch, 23 ... Spring, 24 ... Fulcrum, 25 ... Drive lever, 26 ... Turnbuckle, 27 ... Roller, 28 ... Fulcrum, 29... lever, 30... pin, 31... latch, 32... fulcrum, 33... connecting rod, 34... push rod, 35... buffer rubber.

Claims (1)

[Scope of utility model registration request] In a shutter device that opens and closes the front surface of a connection port for the electrical device provided in a bulkhead of the panel in conjunction with a drawer-type electrical device of a closed switchboard, a guide rod provided on the side of the connection port has a bent edge on the outer periphery. A metal shutter plate provided with a metal shutter plate is attached so as to be able to slide up and down, and a spring is bridged between this shutter plate and the upper part of the partition wall, so that when the electric equipment is pulled out, the shutter plate is pulled up by the spring and its bent edge is pulled up. is engaged with a bent edge provided around the connection port to close the connection port, and when an electrical device is pulled in, a lever that rotates comes into contact with a striker provided on the trolley to turn a turnbuckle. A shutter device for a drawer-type electrical equipment of a closed switchboard, characterized in that the shutter plate is connected to a drive lever which is pressed down against the spring to open the connection port through the shutter plate.