JPS596563B2 - Extraction type circuit breaker shutter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shutter device for an extraction type circuit breaker, and particularly a means for preventing the exposure of the main circuit live parts so as to protect a worker from the main circuit live parts when the extraction type circuit breaker is extracted. The present invention relates to a shutter device that can be opened and closed between a movable main circuit connector and a fixed main circuit connector using the insertion/extraction stroke of a circuit breaker.

The shutter device of the conventional extraction type circuit breaker is designed to close the gap between the movable main circuit connector of the new circuit breaker body and the fixed side main circuit connector of the fixed terminal block when extracting the extraction type circuit breaker body. When inserting the circuit breaker body, one shutter is slid and the movable side main circuit connector passes through the matched cutout hole of both shutters and is connected to the fixed side main circuit connector. The cutout hole in the shutter through which the movable main circuit connector passes is quite large, and therefore the sliding stroke of the shutter must be large.

Therefore, an object of the present invention is to eliminate the drawbacks of the conventional circuit breaker by connecting a female movable side main circuit connector provided on the circuit breaker main body and a female type fixed side main circuit connector provided on the fixed terminal block. Two shutters are provided between the main circuit connectors, and when the cutout holes provided in these two shutters match, the fixed side main circuit connector is penetrated and the movable side and fixed side main circuits are connected. The two shutters are operatively connected to each other so that the connectors can be connected, and the two shutters are closed when the respective cutouts are shifted from each other, and the stroke of inserting and extracting the circuit breaker body is reduced. A shutter device for an extraction type circuit breaker that allows one shutter to slide vertically and also allows two shutters to integrally slide horizontally, with a small shutter stroke and a compact overall size. Our goal is to provide the following.

Other objects and features of the invention will become apparent from this detailed description, taken in conjunction with the accompanying drawings.

The drawing shows an embodiment of the shutter device of the extraction type circuit breaker of the present invention. Circuit connectors 2, 2' and shutter operating plates 3, 3' are provided on both sides of the circuit connectors 2, 2'.
Slanted edges 3a, 3'a are formed at the tip of 3'.

The fixed terminal block 5 made of insulating molded material of the mounting fixing frame 4 includes:
Fixed side main circuit connectors 6゜6 on the power supply side and load side corresponding to the movable side main circuit connectors 2, 2' of the circuit breaker main body 1
' is provided, and these fixed side circuit connectors 6゜6'
are fixed pieces 6a, 6by6'a, which are integrally attached, respectively.
, 6'b to the fixed terminal block 5.

Two shutters 7 and 7' made of insulating material are connected to the movable and fixed main circuit connectors 2 on the power supply side and load side of each pole.
, 2', 6, 6', and the movable side main circuit connector 2
, 2' with the fixed side main circuit connectors 6, 6', the cutout holes 78, 7L are provided in the shutter so that the fixed side main circuit connectors 6, 6' can protrude through the shutters 7, 7'. 7, cutout hole 7'S.

7'L are provided on each shutter 7'.

The shutter 7 has a shutter spring 8, a shutter guide pin 9, and a shutter guide tube 1 at its left and right ends.
It is elastically supported by the fixed terminal block 5 by screws 11 and washers 12.

Shutter spring 8 connects shutter 7 and fixed terminal block 5
The shutter guide pin 9 is attached to the fixed terminal block 5 so as to pass through the cylindrical coil of the shutter spring 80.

The shutter guide tube 10 is integrally fixed to the shutter 7 by suitable means such as caulking, and is slidably attached with the shutter guide pin 9 inserted therethrough.

In addition, a shutter 7 is attached to the tip of the shutter guide pin 9.
A washer 12 is fixed with a screw 11 for preventing removal.

Connecting tabs 13 and 13' having guide holes 14° and 14' are integrally fixed to the left and right sides of the shutter 7, and connecting pins 16 are implanted in side plates 15 provided on both sides of the shutter 7'. 16' are engaged with the guide holes 14, 14' of the connecting tabs 13 and 13', respectively.

Further, a shutter operating pin 17 is installed in the center of the side plate 15.

Therefore, the shutter 7' is connected to the connecting lug 13 of the shutter 7.
, 13' are connected to the shutter 7 so as to be able to slide up and down by connecting pins 16 and 16' which are loosely fitted into the guide holes 14 and 14'.

Further, the shutter actuation pin 17 corresponds to the shutter actuation plate 3 on the circuit breaker main body 1 side.

In the shutter device of the extraction type circuit breaker of the present invention constructed in this way, FIGS. 1 and 4 show a state in which the circuit breaker main body is extracted, and the connecting pin 16 is shown in FIG.
．． The two shutters 7 and 7' connected by the shutter 16' are in a position where they are pressed toward the circuit breaker body 1 side by the shutter spring 8, and the shutter 7' is connected to the connecting ears 13 and 13' of the shutter 7. Guide holes 14, 14
cutout holes 7S and 7L provided in the shutter 7 and the other shutter 7'
The cutout holes 7'S and 7'L provided in the are at mutually shifted positions, and there is no interference between the fixed side main circuit connectors 6, 6' and the movable side main circuit connectors 2, 2'. has been done.

When the circuit breaker main body 1 is inserted from this state, the inclined edge 3a at the tip of the shutter operating plate 3 first engages with the shutter operating pin 17 provided on the shutter 7', and the shutter operating pin 17 engages with the shutter operating pin 17. Actuation plate 30 bevel edge 3
a, and the connecting pin 16 of the shutter 7'
．． 16' moves upward until it touches the upper hole edge of the guide hole 14°14' of the connecting tabs 13, 13' of the shutter 7, and the cutouts 7S, 7L of the shutter 7 and the cutout hole 7'S of the shutter 7', 7'L match each other, resulting in the state shown in FIG. Start pushing ′ horizontally.

This pressing force is applied from the shutter 7' to the connecting pin 16.16'.
is transmitted to the shutter 7 via the shutter 7.7'
are moved in the horizontal direction guided by the shutter guide pin 9 while resisting the shutter spring 8, and the corresponding cutouts 7S, 7'S, 7' of the shutter 7.7' are moved horizontally.
7L, 7'L are moved through the fixed side main circuit connectors 6, 6', and finally the movable side main circuit connectors 2, 2' on the circuit breaker main body 1 side are moved through the fixed side main circuit connectors 6, 6'. (Figure 4).

The extraction operation of the circuit breaker body 1 is the opposite of the insertion operation described above.

In conventional extraction-type circuit breakers, the horizontal stroke of the insertion and extraction of the circuit breaker body is converted into the vertical direction via a lever, and a shutter is attached to this lever, and the cutout hole provided in the shutter is It opens and closes when connecting and closing the circuit connector, but the main circuit connector has a female-type and female-type insertion type connection function for automatic connection, and the connection on the side that passes through the cutout hole of the shutter If the child is female and large, the cutout hole of the shutter will be large and the stroke of the shutter will also have to be large, resulting in a large shutter structure.

Furthermore, providing a female connector with a complicated structure on the fixed side, which is always a live part, has disadvantages in terms of inspection and repair safety.

In contrast, the present invention has female movable main circuit connectors 2, 2' provided on the circuit breaker body 1, and a fixed terminal block 5.
Two shutters 7.7' are provided between the female fixed side main circuit connectors 6, 6' provided in the main circuit connectors 6 and 6', and cutout holes 7S are provided in these two shutters 7.7', respectively. 7L
, 7'S, and 7'L match, the fixed side main circuit connectors 6, 6' can be penetrated to connect the movable side and fixed side main circuit connectors 2, 2', 6, 6'. and cutout holes 78, 7L, and 7'S, respectively.

7'L is closed when the positions of the two shutters 7 and 7' are shifted from each other, and the two shutters 7 and 7' are operatively connected. .1 shutter 7' at the center of 7'
is slid vertically, and two shutters 7.7'
The cutouts 7S and 7L provided in the shutter 7゜7' can be slid together in the horizontal direction.
,? 'S, 7'L are female fixed side main circuit connectors 6, 6'
Since the vertical dimension of the cut-out hole may be the thickness C' dimension of the fixed side main circuit connectors 6, 6' or the larger dimension 5 as shown in Fig. 1, the shutter 7 .7
The upper and lower strokes of ' are 6 dimensions, which are slightly larger than the 5 dimensions, and can make the main circuit connections more flexible.

In other words, with conventional shutters that only move up and down, the female main circuit connector on the movable side must pass through the cutout hole in the shutter, which requires a cutout hole larger than 8 dimensions. In addition, the stroke of the shutter must be larger than 8 dimensions, but by using the method of this invention, the vertical stroke of the shutters 7 and 7' can be made small, which has the effect of making the entire shutter mechanism more compact. .

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially sectional side view showing the extracted state of the circuit breaker body with the shutter closed, and Fig. 2 shows the circuit breaker with the shutter open. Fig. 3 is a partially sectional side view showing the inserted state of the circuit breaker main body with the main circuit connector connected, and Fig. 4 is a partially sectional side view showing the process of inserting and extracting the main circuit breaker. FIG. In the figure, 1... circuit breaker body, 2... movable side main circuit contact, 3, 3'... shutter actuating plate, 5...
Fixed terminal block, 6, 6'...Fixed side main circuit contact, 7,
7'...Shutter, 7S, 7L, 7'S
, 7'L... Cutout hole, 8... Shutter spring, 9... Shutter guide pin, 13.13'...
- Connecting ear piece, 14, 14'... Guide hole, 15... Throat l plate, 16, 16'... Connecting pin, 17... Shutter operating pin.

Claims (1)

[Scope of Claims] 1. Two sheets between the female movable main circuit connector provided on the extractor type circuit breaker body and the female fixed side main circuit connector provided on the fixed terminal block. shutters are provided, and when the cutouts provided in these two shutters match, the fixed side main circuit connector is passed through the matched cutouts to connect the movable and fixed side main circuits. In a shutter device for an extraction type circuit breaker, in which the cutouts are mutually shifted and closed when the circuit breaker main body is extracted, the cutouts of the two shutters should match (one side The other shutter is slidably connected and supported with respect to the shutter, and both shutters are horizontally connected to the fixed terminal block so that the fixed side main circuit connector protrudes through the matching cutout hole of both shutters. A shutter actuating plate is provided on the circuit breaker body so that it can be slid integrally with the circuit breaker body, and it can be slid between both shutters when the circuit breaker body is inserted and extracted, and can also be slid integrally in the horizontal direction. A shutter device for an extraction type circuit breaker, characterized in that: 2. When the circuit breaker main body is inserted, the shutter plate is moved up and down by the sloped edge formed at the tip of the shutter actuating plate provided on the circuit breaker main body. The shutter device of the extraction type circuit breaker according to claim 1, wherein the shutter is slid in the horizontal direction and then the shutter is slid in the horizontal direction by the tip of the shutter operating plate. The shutters are loosely connected by a vertical guide hole provided on the connecting tab and a connecting pin, and the shutter is held horizontally by a shutter guide pin attached to the fixed terminal block and a shutter spring provided between the shutter and the fixed terminal block. A shutter device for an extraction type circuit breaker according to claim 1 or 2, wherein the shutter device is supported so as to be slidable in a direction, and at least one of the shutters is configured to be slidable in a vertical direction as well. .