JP2589109Y2 - Closed switchboard shutter device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter device for a closed switchboard, and more particularly, to a shutter device for a closed switchboard which accommodates a circuit breaker for an up / down double bus bar.

[0002]

2. Description of the Related Art An elevating type double bus interrupting device is configured such that one circuit breaker is moved upward or downward to selectively connect and disconnect two different buses. FIG. 5 shows a closed switchboard containing a conventional circuit breaker for a double-barrel type double bus. In FIG. 5, 1 is a closed switchboard, 2 is a first bus, 3
Is a second bus, and 4 are cables, which are provided in rooms each partitioned by a partition. 5 is an equipment room, 6 is a partition wall between the equipment room 5 and the busbar and cable room, 7 to 9 are upper, middle, and lower fixed disconnecting portions provided on the partition wall 6, 10 to 12
Is an upper, middle, and lower shutter that shields the fixed disconnecting portions 7 to 9, 13 is a truck, and 14 is an up / down double-bus breaker that can be fixed to the upper or lower position of the truck 13 (hereinafter simply referred to as a breaker). When the circuit breaker 14 is drawn out of the closed switchboard 1 or cannot be moved up and down unless it is in the disconnection position, and is fixed at a predetermined upper or lower position. Can be inserted from the disconnection position to the connection position. 14a is a movable disconnecting portion of the circuit breaker 14, and FIG. 5 shows a state in which the circuit breaker 14 is at the lower connection position and the shutters 10 to 12 are open.

FIG. 6 is an explanatory view of a shutter portion. Since the shutters 10 to 12 have the same structure, only the shutter 10 will be described. The shutter 10 includes a shutter plate 10a and shutter arms 10b fixed to both ends of the shutter plate 10a. Reference numeral 15 denotes a bearing fixed to the partition wall 6, 15a,
Reference numeral 15b denotes a support shaft and a stopper protruding from the support bearing 15, and the shutter 10 is rotatably provided via the support shaft 15a. 16 is a connecting rod 21 and a shutter arm 10 to be described later.
6B, when the shutter bar 10b is pushed upward by the connecting rod 21, as shown by a two-dot chain line in FIG. 6B, the shutter 10 rotates clockwise about the support shaft 15a. When the shutter 10 is moved and opened, and then pulled downward, the shutter 10 rotates counterclockwise around the support shaft 15a, closes, and stops against the stopper 15b.

FIG. 7 is a view showing a conventional shutter device. The circuit breaker 14 is fixed to a lower position of the carriage 13 and is in a disconnection position. 14b is a roller protruding from one side of the circuit breaker 14, and 17 and 18 are rotatably provided by fitting one end into an upper supporting shaft 19 and a lower supporting shaft 20 projecting from the side wall of the equipment room 5, respectively. Shutter lever 21 and shutter 1
Connecting rods 22 and 23 connecting 0 to 12 are connecting rods connecting the other ends of the shutter levers 17 and 18 to the connecting rod 21 via joint pins 24, respectively.

When the circuit breaker 14 in the disconnecting position is inserted into the connection position shown by the two-dot chain line, the roller 14b pushes up the shutter lever 18, pushes up the connecting rod 21 via the connecting rod 23, and moves the shutters 10 to 12 at two points. Since the movable disconnecting portion 14a is opened as indicated by a chain line, the movable disconnecting portion 14a is
9, the second bus 3 and the cable 4 can be connected by turning on the circuit breaker 14.

When the circuit breaker 14 is pulled out from the connection position shown by the two-dot chain line to the disconnection position shown by the solid line, after the movable disconnecting portion 14a is pulled out from the shutters 11 and 12, the shutter lever 18 moves clockwise about the support shaft 20. And the connecting rod 2
3, the connecting rod 21 is pulled down, and the shutters 10 to 12
To close the fixed disconnecting portions 7 to 9 shown in FIG. When the circuit breaker 14 is fixed at the upper position of the cart 13,
The shutter 14 is driven by the roller 14b to open and close the shutters 10 to 12, so that the movable disconnecting portion 14a and the fixed disconnecting portions 7 and 8 can be brought into contact with or separated from each other. Shutter lever 1
7 and 18 are both connected to the connecting rod 21 by the connecting rods 22 and 23, so that when one of the shutter levers is driven, the other shutter lever performs the same operation.

[0007]

The shutters 10 to 12 of the shutter device of the closed switchboard described in the prior art are all opened and closed at the same time, except that the movable disconnecting portion of the circuit breaker comes and goes.
For example, when the shutters 11 and 12 in FIG. 5 are opened, the shutter 10 that shields the fixed disconnecting section 7 is also opened to expose the charging section.

Further, when a maintenance worker enters the equipment room and inspects the fixed disconnection portion, if any one of the shutters is opened, all the other shutters are opened, which is dangerous.

Further, since all shutters and shutter levers are connected by connecting rods, a large force is required to open and close the shutters.

The present invention has been made in view of the above points, and it is possible to automatically open and close only a fixed disconnection shutter to and from which a movable disconnecting portion of a circuit breaker comes and goes. It is an object of the present invention to provide a shutter device for an open / close switchboard that can easily open and close only a manual switch.

[0011]

Means for accomplishing the above object of the present invention is to provide a shutter device for a closed switchboard housing a circuit breaker for an up / down double bus bar, comprising: a lower portion of both right and left walls of the switchboard; One end is fitted into a support shaft protruding from the upper part and is rotatably provided. When the circuit breaker is at a lower part or an upper position of the bogie, rollers provided on both side surfaces of the circuit breaker protrude. The other end of the shutter lever to be driven is connected to the shutter lever on one lower side wall (right side) on one side (right side) of the lower shutter.
The shutter lever on the other lower side wall (left side) is on the other side surface (left side surface) of the intermediate shutter, the shutter lever on the upper side wall (right side) is on the right side surface of the intermediate shutter, and the other upper side shutter lever. The shutter lever on the side wall (left side) is connected to the left side surface of the upper shutter via a joint pin and a connecting rod, respectively.

Further, in order to make it easier to manually open and close the shutter, the length of each connecting rod is increased toward the shutter lever by the moving distance of the joint pin due to the rotation of the shutter lever. An elongated hole having a length equal to the extended length and capable of sliding the joint pin is provided in a longitudinal direction of the extension portion.

[0013]

When the circuit breaker is at the lower position of the bogie, a lower shutter connected to a shutter lever on one lower side wall (right side) driven by a roller of the circuit breaker by being inserted into and removed from the connection position; The intermediate shutter connected to the shutter lever on the other side wall (left side) automatically opens and closes, and the upper shutter remains closed.

When the circuit breaker is at the upper position of the bogie, an intermediate shutter connected to a shutter lever on the upper right wall driven by rollers of the circuit breaker by being inserted into and removed from the connection position; The upper shutter connected to the shutter lever automatically opens and closes, and the lower shutter remains closed.

Further, by extending the engagement portion of the connecting rod with the shutter lever to provide an elongated hole, manual opening / closing of each shutter moves only the shutter and the connecting rod connected to the shutter. Manual opening and closing can be easily performed with force.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. Note that the same parts as those in FIGS.

In FIG. 1 showing one embodiment of the present invention, 2
5a and 26a are support shafts protruding from the upper and lower portions of the right side wall as viewed from the front of the equipment room 5, 25b and 26a.
b is a support shaft protrudingly provided on the upper and lower portions of the left side wall,
27a, 28a and 27b, 28b
a, 26a and 25b, 26b, one ends of which are rotatably provided, and when the circuit breaker 14 is at the lower or upper position of the cart 13, the rollers 14c protrudingly provided on both side surfaces of the circuit breaker 14. The shutter lever is driven by the shutter lever. 32 is the other end of the lower right shutter lever 28a and one side of the lower shutter 12, 31 is the other end of the lower left shutter lever 28b and the left side of the intermediate shutter 11, and 30 is the upper right shutter lever. A connecting rod 29 connects the other end of 27a and the right side of the intermediate shutter 11, and 29 connects the other end of the upper left shutter lever 27b and the left side of the upper shutter 10 via joint pins 24 and 16, respectively.

When the circuit breaker 14 is fixed to the lower part of the carriage 13 and is inserted into or removed from the connection position, the shutter lever 28
a and 28b are driven by rollers 14c protruding from both sides of the circuit breaker 14, and connected to a lower right shutter lever 28a by a connecting rod 32, and a lower left shutter lever 28b. The shutter 11 automatically opens and closes together with the intermediate shutter 11 connected by the connecting rod 31. At this time, the upper right shutter lever 27a connected to the intermediate shutter 11 by the connecting rod 30 swings about the support shaft 25a with the opening and closing of the intermediate shutter 11, but the upper left shutter lever 27b Has no relation to the operation of the shutters 11 and 12, the upper shutter 10 remains closed.

When the circuit breaker 14 is fixed to the upper part of the carriage 13 and is inserted into or removed from the connection position, the shutter lever 27
a and 27b are driven by the roller 14c, and the middle shutter 11 connected to the upper right shutter lever 27a by the connecting rod 30 and the upper left shutter lever 27b.
The upper shutter 10, which is connected to the connecting rod 29, automatically opens and closes together. At that time, the connecting rod 31 is attached to the intermediate shutter 11.
Lower left shutter lever 28 connected by
b swings about the support shaft 26b with the opening and closing of the intermediate shutter 11, but the lower right shutter lever 28
Since a is independent of the operation of the shutters 10 and 11, the lower shutter 12 remains closed.

Therefore, when the circuit breaker is inserted and removed from the disconnection position to the connection position, only the shutter that blocks the fixed disconnection portion where the movable disconnection portion of the circuit breaker comes and goes is automatically opened and closed, and the other fixed disconnection portions are shielded. The shutter is closed and the charged part is not exposed.

The lower right shutter lever 28a
The lower shutter 12 is connected to the lower shutter lever 28b by a connecting rod 31 and the intermediate shutter 11 is connected to the upper right shutter lever 27a by a connecting rod 30. , Each shutter of the upper shutter 10 connected to the upper left shutter lever 27b by the connecting rod 29 is independent of the other shutters.
When entering the inside and checking the fixed disconnection part, only the shutter selected arbitrarily can be opened while the other shutters are closed, and the force required for opening and closing the shutters is all the shutters described in the related art, Unlike the one in which the connecting rod and the shutter lever are simultaneously moved, the manual opening and closing operation can be easily performed with a small force.

FIG. 2 is a view showing another embodiment of the present invention, in which the manual opening / closing operation of the shutter is further facilitated.

In FIG. 2, the connecting rods 33 to 36 are
The length of the connecting rods 29 to 32 at
a to 28b side, the moving distance of the joint pin 24 by the rotation of the shutter levers 27a to 28b driven by the roller 14c is increased, and the extended length of the connecting rods 29 to 32 is extended in the longitudinal direction. And long holes 33a to 36a in which the joint pin 24 can slide. 37a and 37b are upper shutter levers 2
Reference numerals 38a and 38b of 7a and 27b are lower position stoppers of the lower shutter levers 28a and 28b, and are fixed to both side walls of the equipment room 5.

In FIG. 2, in which the circuit breaker 14 is fixed to the lower part of the carriage 13 and inserted into the connection position, the support shaft 26 is provided by rollers 14c protruding from both sides of the circuit breaker 14.
The shutter levers 28a and 28b rotated counterclockwise around the a and 26b push up the connecting rods 36 and 35 to open the lower shutter 12 and the intermediate shutter 11, and the movable disconnecting portion 14a is not shown and is fixed. Insert and connect to disconnecting part. At this time, the connecting rod 34 connected to the right side of the intermediate shutter 11 moves upward with the opening of the intermediate shutter 11, but the joint pin 24 slides in the elongated hole 34a. 27a does not move.
Also, the connecting rod 33 is attached to the upper left shutter lever 27b.
The upper shutter 10 connected by the switch has no relation to the operation of the other shutters, and thus remains closed. When the circuit breaker 14 is pulled out from the connection position to the disconnection position,
The shutter levers 28a and 28b rotate clockwise and stop against the stoppers 38a and 38b, and the lower shutter 12 to which the connecting rod 36 is connected and the intermediate shutter 11 to which the connecting rods 34 and 35 are connected are supported by the support shaft 15a.
And is closed counterclockwise around and stops at the stopper 15b.

Next, when the circuit breaker 14 is fixed to the upper part of the carriage 13 and inserted into the connection position, as shown in FIG.
The shutter levers 27a and 27b rotated counterclockwise around the support shafts 25a and 25b by the rollers 14c push up the connecting rods 34 and 33 to open the intermediate shutter 11 and the upper shutter 10, and the movable disconnecting section 14a is illustrated. Is inserted and connected to the fixed disconnecting section where is omitted. At this time, the connecting rod 35 connected to the left side of the intermediate portion shutter 11 moves upward as the intermediate portion shutter 11 opens,
4 slides in the elongated hole 35a, so that the lower left shutter lever 28b does not move. The lower shutter 12 connected to the lower right shutter lever 28a by the connecting rod 36 is irrelevant to the operation of the other shutters and remains closed.

When the circuit breaker 14 is pulled out of the connection position to the disconnection position, the shutter levers 27a and 27b rotate clockwise and stop against the stoppers 37a and 37b, and the upper shutter 10 to which the connecting rod 33 is connected, the connecting rod 3
The intermediate shutter 11 to which the shutters 4 and 35 are connected rotates counterclockwise around the support shaft 15a, closes, and stops against the stopper 15b.

FIG. 4 is an explanatory view showing a case where the shutter is manually opened and closed, and shows a case where the intermediate shutter 11 is opened. When the intermediate shutter 11 is opened, the shutter 1
1 has one end connected thereto and the other end provided with elongated holes 34a, 35a, the connecting rods 34, 35 move upward, but the joint pin 24 slides in the elongated holes 34a, 35a to move the shutter levers 27a, 28b does not move. When the upper shutter 10 is opened, the connecting rod 33 moves upward, and when the lower shutter 12 is opened, the connecting rod 36 moves upward.
a, 36a, and slide in the shutter levers 27b, 28a.
Does not move.

That is, when the shutter is manually opened and closed, it is only necessary to move the connecting rod connected to the shutter, and it is not necessary to move the shutter lever. be able to.

[0029]

Since the present invention is configured as described above, the present invention has the following practical effects.

In the shutter device of the closed switchboard shown in FIG. 1, when the circuit breaker is fixed to the upper or lower part of the bogie and is inserted / removed to the connection position, the movable disconnecting portion of the circuit breaker blocks the fixed disconnecting portion to be separated / separated. Only the shutter that opens and closes automatically opens and closes the other shutters that block the fixed disconnecting section, and the charging section is not exposed to the equipment room.

When a maintenance person manually opens and closes a shutter to enter an equipment room and perform an inspection or the like, an arbitrary selected shutter is connected to the shutter while the other shutters are closed. It can be opened and closed by moving with the connecting rod and shutter lever that is described in the prior art,
Unlike opening and closing by simultaneously moving all shutter connecting rods and shutter levers, manual opening and closing operations of only the shutter selected arbitrarily can be easily performed with a small force.

The shutter device of the closed switchboard of FIG. 2 has the same automatic opening and closing function of the shutter as the shutter device of the closed switchboard of FIG. 1, and independently opens and closes the shutters independently of the other shutters. It is only necessary to move the shutter and the connecting rod connected to the shutter, and it is not necessary to move the shutter lever. Therefore, the manual opening and closing operation of the shutter can be more easily performed with a smaller force.

[Brief description of the drawings]

FIG. 1 is a side view of one embodiment of the present invention.

FIG. 2 is a side view of another embodiment of the present invention.

FIG. 3 is an explanatory side view when a circuit breaker is fixed to an upper part of a bogie in the other embodiment.

FIG. 4 is a side view for explaining manual opening and closing of a shutter in the above other embodiment.

FIG. 5 is an explanatory side view of a conventional closed switchboard.

FIG. 6 is an explanatory view of a shutter portion, (A) is a plan view,
(B) is a side view

FIG. 7 is an explanatory side view of a conventional shutter device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Closed switchboard 5 ... Equipment room 10 ... Upper shutter 11 ... Middle part shutter 12 ... Lower shutter 13 ... Truck 14 ... Lifting type double bus breaker 14c ... Roller 24 ... Joint pin 25a, 25b, 26a, 26b ... Support Shaft 27a Upper one side wall (right side) shutter lever 27b Upper side other side wall (left side) shutter lever 28a Lower side one side wall (right side) shutter lever 28b Lower lower side wall (left side) Shutter lever 29-36 ... Connecting rod 33a-36a ... Slot

Claims (2)

(57) [Scope of request for utility model registration] An intermediate disconnecting portion provided on a partition wall in a switchboard, and upper and lower disconnecting portions of a first bus and a second bus provided above and below the intermediate disconnecting portion, wherein the upper disconnecting portion and the intermediate disconnecting portion are provided. The movable disconnecting part of the circuit breaker can be selectively connected at the upper position and the lower position of the circuit breaker, and the lower disconnecting part and the intermediate disconnecting part can be selectively connected to the circuit breaker. An upper or lower disconnecting section and a movable disconnecting section are connected and disconnected, and the upper and lower shutters and the intermediate section shutter that shield the entire surface of the disconnecting section by this connection and disconnection are opened and closed. Rollers are protruded on the left and right sides of the switchboard, and support shafts are respectively provided on the upper and lower sides of the left and right side walls of the equipment room in the switchboard. Upper and lower shutter levers which are rotated in engagement with the rollers at the outer and lower positions, and the other ends of the upper and lower shutter levers on one side wall (right side) are the intermediate and lower shutter levers. One side (right side) of the shutter is connected via a connecting rod, and the other end of the upper and lower shutter levers on the other side (left side) is connected to the other side (left side) of the middle and upper shutters. ), Wherein the shutter is opened and closed by turning a shutter lever by connecting the shutter lever to a shutter via a connecting rod. 2. The shutter device for a closed switchboard according to claim 1, wherein the length of each connecting rod is increased toward the shutter lever by the moving distance of the joint pin due to the rotation of the shutter lever. A shutter device for a closed switchboard, characterized in that an elongated hole is provided in the extension portion longitudinal direction, the elongated hole being equal to the extended length and allowing the joint pin to slide.