JPH0122329Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a double-bus type closed switchboard, and especially when a drawer type or disconnector is carried into either the front or back side or the disconnection chamber, the other This invention relates to a closed switchboard equipped with an interlock device that prevents drawers and disconnectors from being brought into the disconnector chamber.

In general, a closed switchboard with a double busbar system is equipped with a front disconnection chamber and a disconnection chamber on the rear side, respectively, as shown in Figure 1, and these disconnection chambers are paired and either one A pull-out type or disconnector is brought in and only one of the double busbars is used.

In the figure, reference numeral 1 denotes a board, and the board 1 has a sheath disconnection chamber 2 on both sides of the front and back sides.
A busbar chamber 4 is integrally formed by partition plates 3, 3 that define a busbar chamber 4. Reference numeral 5 denotes a drawer type or disconnector, and the drawer type or disconnector 5 is connected to the door body 6 at the front of the disconnector chamber 2, 2,
6 can be opened to carry in and out, and when carried into the disconnector chamber 2, the connecting conductor 2a engages with the disconnecting section bushing 7, and the power supply is connected via the branch bus bar 8a connected to the disconnecting section bushing 7. Opens and closes the main circuits of the bus 8 and load bus 9. Note that 10 is a load cable, and the load cable 10 is connected to the load bus 9. Reference numeral 11 denotes a control circuit section, and the control circuit section 11 controls the operation of the drawer mold and the disconnector 5.

By the way, according to the above-mentioned double bus type closed switchboard, only one of the left and right power bus bars 8 is used, and the other is used as a backup or for switching the power supply, and either the drawer type or the disconnector 5 is used. In order to open and close one of the main circuits, one unit per board is sufficient. Therefore, one drawer shaper and disconnector 5,
If it is carried into either the front or back sheath disconnection chamber 2, the other sheath disconnection chamber 2 will be empty. Therefore, in the case of a combination of one panel body 1 and one drawer cutter or cutter 5, it is not possible to carry the drawer cutter or cutter 5 into both the drawer cutter chambers 2, 2 at the same time. Therefore, it is unlikely that an excessive current will be conducted to the load bus bar 9 and cause an accident such as damage to equipment on the load side. However, when a so-called row panel configuration in which a plurality of panels 1 are installed side by side in close proximity to each other, one drawer type or disconnector 5 is installed on each panel 1.
A stand is prepared, and when replacing the front side or the back side, there is a high risk of accidentally loading the panel 1 that has already been loaded on one side. If the container 5 is carried in, it has disadvantages such as damaging equipment on the load side.

However, in the current situation, there is a great possibility that the drawer mold and the cutter 5 will be carried in at the same time, and there is an urgent need to eliminate such a risk.

Therefore, in this invention, when a drawer type or disconnector is carried into either the front side or the back side of a closed switchboard of a double bus bar system or the disconnection chamber, the drawer type or disconnector is brought into the other side. The above-mentioned drawbacks are to be overcome by providing an interlock device that prevents the device from being put into general use. Therefore, in a closed switchboard with a double busbar system, in which drawers and disconnectors are carried in and out from the front and rear sides of the panel body, the present invention is designed to install a rotary circuit in a vertical plane on each of the front and rear sides and at the bottom of the disconnector chamber. A stopper that is movably supported on a shaft and has one end that can be freely collapsed, and a cam that is rotatably supported on a horizontal plane and has a roller at one end are respectively provided so as to be able to contact the drawer-shaped cutter and the disconnector. The other ends of the cam and the cam are interlockably connected as a set between the front and rear sides and the disconnection chamber, and a protrusion that can be engaged with and detached from the stopper is formed on the side surface of the drawer shape and the disconnection chamber. Provided is a double-bus type closed switchboard characterized by having an interlock device comprising:
As a result, when a drawer or disconnector is being carried into one of the shelves or the disconnection chamber, a stopper stands up in the other compartment to prevent the drawer or disconnector from being carried in. This makes it impossible to carry a drawer or disconnector into the front and back sides or the disconnector chamber at the same time.

An embodiment of the present invention will be described below based on the drawings. FIG. 2 is a side view of the main part, and FIG. 3 is a plan view of the main part. In the figures, the same parts as in FIG. 1 have the same reference numerals.

Reference numeral 12 denotes a stopper, and the stopper 12 is disposed on the upper surface of one of the guide rails 1b projecting from the bottom 1a of the board 1, and has the following configuration. That is,
As shown in FIGS. 4 and 5, the guide rail 1
A U-shaped bearing 16 is fixed to the upper part of the mounting plate 14, which has a hook-shaped cross section and is fixed on the top of b via a bolt 15 and a nut 15a, and a rotating plate-like member is attached to the bearing 16 via a shaft 17. A plate 13 is rotatably supported. The rotary plate 13 has an end surface 13a perpendicular to the direction in which the drawer and cutter 5 are carried in and out.
One end of the spring 18 is engaged near 3a. The other end of the spring 18 is attached to a fastening portion 14a formed on a part of the mounting plate 14, and the spring 18 is attached to the rotating plate 13.
provides a force to rotate counterclockwise about the shaft 17. On the other hand, the rotary plate 13 has one end of the coupling tool 19 fixedly attached to the side facing the vertical end surface 13a about the shaft 17. The connector 19 is made of, for example, a wire rope, and is fastened to the hole 13b of the rotary plate 13 by a bolt 20, a countersunk 20a, and a nut 20b inserted through one end of the connector 19.

Reference numeral 5a denotes a protruding portion, and the protruding portion 5a is a metal fitting having a hook-shaped cross section, and is protruded from a portion on one side of the drawer type or disconnector 5 that can be engaged with and detached from the vertical end surface 13a of the rotating plate 13. There is.

In FIGS. 2 and 3, a cam 21 is configured to be rotatable in a horizontal plane above the other guide rail 1c facing the guide rail 1b. That is, as shown in FIGS. 6 and 7, a seat plate 23 with a convex cross section is fixed onto the guide rail 1c through its mounting hole 23a via bolts 22 and nuts 22a, and the seat plate 23 is has a shaft 24 projecting vertically, and a lever 25 on the shaft 24.
is rotatably supported in a horizontal plane. A roller 26 is rotatably supported at one end of the lever 25, and a claw 25a is provided in an erect and protruding manner at the other end. Reference numeral 27 denotes a drive lever, and the drive lever 27 is rotatably supported on the shaft 24 in order to engage with the pawl 25a and interlock the lever 25. 2
Reference numeral 7a denotes a locking hole, and the locking hole 27a is connected to the connector 19.
It is attached at one end. 28 is a spring, and the spring 2
8 is engaged with the lever 25 and the drive lever 27, respectively, and is biased so that the claw 25a of the lever 25 is always in contact with the side surface of the drive lever 27.
Further, the lever 25 and the drive lever 27 are integrally rotatable about the shaft 24.

The stopper 12 and the cam 21 are respectively provided on the front (left side) and rear side (right side) of FIG. 1 and in the disconnection chamber 2, and as shown in FIG. It consists of a symmetrical arrangement. Therefore, the stopper 12 on the front and the cam 21 on the back are connected together by the connecting tool 18, and the cam 21 on the front and the stopper 12 on the back are connected together by the connecting tool 19.
They are each connected together.

Next, the operation of the present invention will be explained based on the above embodiment. When no drawer type or disconnector 5 is carried into either the front or rear side or the disconnector chambers 2, 2,
The rotating plate 13 of the stopper 12 is rotated to the left around the shaft 17 as shown by the phantom line in FIG. ing. On the other hand, cam 21
The rotary plate of the stopper 12 is moved so that the roller 26 enters the movement locus of the drawer and disconnector 5 and the lever 25 stops at a position orthogonal to the seat plate 23, as shown by the solid line in FIG. A connector 19 connected to 13 pulls one end of the lever 27 toward the stopper 12.
Therefore, in Fig. 3, the front side A and the disconnection chamber 2 are
When the drawer shape or cutter 5 is carried in, the protrusion 5a of the drawer shape or cutter 5 touches the vertical end 1 of the stopper 12.
3a, but the other side, which does not have the protrusion 5, contacts the roller 27 of the cam 21. Then, the lever 25 rotates about the shaft 24 in the direction in which the drawer and disconnector 5 are carried in. When the lever 25 rotates, its pawl 25a rotates the lever 27 about the shaft 24 in a direction opposite to the direction in which the drawer and disconnector 5 are carried in. Therefore, as shown by the phantom line in FIG. 7, when the roller 26 moves downward, the lever 27 rotates upward and its hole 27a moves upward, so that the coupling 19 rotates the stopper 12 on the back side B. Pull the moving plate 13 toward the cam 21. Therefore, the rotary plate 13 of the stopper 12 on the back side B rotates clockwise about the shaft 17 against the force of the spring 18, and the vertical end surface 13a rises, causing the protrusion 5a of the drawer-shaped cutter 5 (See the solid line diagram in Figure 5). Therefore,
Since the rotary plate 13 of the stopper 12 is erected in the back side B-side cutter chamber 2 where no drawer or cutter 5 has been carried in, the back side B-side cutter chamber 2 is in such a state. When the drawer shape or cutter 5 is carried in, the protrusion 5a collides with the vertical end surface 13a of the rotary plate 13, as shown by the solid line in FIG. It becomes impossible. On the other hand, front side A
When the drawer shape and cutter 5 are carried outward from the cutter 2, the roller 26 of the cam 21 separates from the drawer shape and cutter 5. That is, when the rotational restriction of the roller 26 by the drawer or the disconnector 5 is released, the spring 1 biasing the rotational plate 13 to the left rotates.
The force of 8 causes the coupling 19 to pull the lever 27.
Therefore, the rotary plate 13 returns to the state shown by the phantom line in FIG. 5 as described above, and the lever 2 of the cam 21
5 and 27 also return to the state shown by the solid line in FIG.

In this way, when a drawer or disconnector 5 is carried into the disconnector chamber 2 on either the front side A or the rear side B, the stopper 1 of the opposite disconnector chamber 2 is necessarily loaded.
2 operates, and the vertical end surface 13a of the rotary plate 13 enters the movement locus of the protrusion 5a of the drawer or disconnector 5, and the drawer or disconnector 5 is placed in the other side or disconnector chamber 2. cannot be imported. Thus, it is not possible to carry the drawer and disconnector 5 into both the front side A and rear side B disconnection chambers 2 at the same time.

The effects of the present invention described above are as follows.
A cam 21 that rotates in conjunction with the loading and unloading of the drawer and disconnector 5, and a stopper 1 that rotates in conjunction with the operation of the cam 21.
2 is installed in each of the front and back compartments, so if a drawer or disconnector 5 is carried into either compartment 2, it will be transferred to the other compartment. Even if the drawer type or disconnector 5 is brought into the stopper 12
prevents them from being carried in, and it is possible to completely eliminate the situation where the drawer type and the cutter 5 are carried into both the front and back cutter chambers 2 at the same time. Therefore, electric power is simultaneously supplied from the two power sources to the load device side, and it is possible to completely eliminate accidents in which twice the predetermined current flows and damages or destroys the load device.

[Brief explanation of drawings]

Fig. 1 is a schematic vertical sectional view showing a conventional double-bus type closed switchboard, Fig. 2 is a side view of the main part of an embodiment of the present invention, and Fig. 3 is a plan view of the main part of Fig. 2; Fig. 4 is a plan view showing the stopper of the present invention, and Fig. 5 is a plan view showing the stopper of the present invention.
6 is a partially sectional side view showing the cam of the present invention, and FIG. 7 is a plan view of FIG. 6. DESCRIPTION OF SYMBOLS 1...Disc body, 2...Shipping chamber, 5...Drawer-shaped cutter, 5a...Protrusion, 12...Stopper,
21...Cam, 26...Lola.

Claims (1)

[Scope of utility model registration request] In a closed switchboard with a double busbar system, in which drawers and disconnectors are carried in and out from the front and back of the panel, a shaft is installed at each of the front and back sides and at the bottom of the disconnector chamber 2, so that it can rotate freely in a vertical plane. Stopper 1 that is supported and can be freely lowered at one end
2 and a cam 21 which is rotatably supported in a horizontal plane and has a roller 26 at one end so as to be able to come into contact with the drawer shape and disconnector 5, and the stopper 12 and the other end of the cam 21. are interlockably connected as a set between each of the front and back sides and the disconnection chamber 2, and a protrusion 5a that can be engaged with and detached from the stopper 12 is formed on the side surface of the drawer shape and the disconnection chamber 5. A double bus type closed switchboard characterized by having an interlock device.