JPH022013Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a shutter device for an extraction type circuit breaker, and in particular, a movable main circuit connector provided on the circuit breaker body and a movable main circuit connection. The present invention relates to a shutter device that shields a main circuit connector on a fixed side provided on a fixed frame side corresponding to a child.

BACKGROUND OF THE INVENTION Interesting shutter devices for extraction type circuit breakers include Japanese Utility Model Application Publication No. 166108/1982 and Japanese Utility Model Publication No. 18801/1989 filed by the same applicant as the present application. According to a shutter device for an extraction type circuit breaker disclosed in Japanese Utility Model Application Publication No. 55-166108, when the circuit breaker main body is inserted into a fixed frame, the shielding state of the shutter is released and the main disconnection section of the primary disconnection section is opened. Circuit connectors can be connected. On the other hand, when the circuit breaker main body is extracted from the fixed frame, the shutter is automatically placed in a shielding state. Furthermore, the shutter device shown in this Japanese Utility Model Publication No. 55-166108 is designed so that the shutter, which is in a shielded state after extracting the circuit breaker body, will not open due to careless human operation. It has a mechanism. This prevents the live part from being exposed due to careless manual operation.

The shutter locking device for an extraction type circuit breaker disclosed in Japanese Utility Model Publication No. 18801/1980 is designed to prevent the shutter from opening by locking, and to prevent insertion of the circuit breaker body due to erroneous operation. I have to.

Problems to be Solved by the Invention In each conventional shutter device, each component to be attached to the fixed frame side and each component to be attached to the shutter side are separately provided at specific positions. Therefore, there was a drawback that assembly processing was not easy and complicated. In addition, a device that has the function of preventing the shielded shutter from opening due to careless human operation and a device that prevents insertion of the circuit breaker body due to mistaken operation by locking it are installed separately. Therefore, there is also the disadvantage that assembly processing becomes even more complicated.

Therefore, the purpose of this invention is to have both the function of preventing the shielded shutter from being opened by human operation, and the function of preventing the insertion of the circuit breaker body due to erroneous operation by locking it. To provide a shutter device for an extraction type circuit breaker in which a shutter operating mechanism is integrated into a unit, thereby facilitating assembly and equipment.

Means for Solving the Problems The shutter device of the extraction type circuit breaker according to this invention has a movable main circuit connector provided on the circuit breaker body and a fixed frame corresponding to the movable main circuit connector. It includes a fixed side main circuit connector provided on the side, a shutter, a shutter spring, and a shutter operating unit body. The shutter is provided on the fixed frame side. This shutter shields the front surface of the fixed side main circuit connector when the circuit breaker body is extracted, and opens the front surface of the fixed side main circuit connector when the circuit breaker body is inserted into the fixed frame. It is said that it can be slid on. A shutter spring always restrains the shutter in the shielded position. The shutter actuating unit body is configured to be able to slide the shutter in response to insertion and extraction operations of the circuit breaker body, and is attached to the fixed frame.

The shutter actuating unit body has a mounting board fixed to the fixed frame, and a shutter lever rotatably mounted to the mounting board and having one end connected to the shutter. The shutter lever includes a pressing portion that is pressed by the circuit breaker body when the circuit breaker body is inserted into the fixed frame. When the pressing portion is pressed, the shutter lever rotates, and the shutter slides to release its shielding.

The shutter actuating unit body further includes a lock lever attached to the shutter lever so as to be able to rotate between a first position and a second position, and a lock lever that is configured to always return the lock lever to the first position. and a lock lever spring that biases the lock lever. When the circuit breaker body is extracted, the lock lever is in the first position.
On the other hand, when the circuit breaker body is inserted into the fixed frame, the lock lever is pushed by the circuit breaker body and rotates to the second position.

The shape of the lock lever is selected so as to satisfy the following conditions. That is, if the shutter is slid while the lock lever is in the first position, the lock lever engages with an engaging portion formed on the mounting board, thereby inhibiting the shutter from sliding. On the other hand, when the lock lever is in the second position, the engagement between the lock lever and the engaging portion of the mounting board can be released.

The shutter actuating unit body further includes a padlock plate which is attached to the mounting board so as to be rotatable between a first position and a second position and has a locking hole, and a padlock plate which is always arranged above the position. and a padlock plate spring that urges the padlock plate to return to the first position. When the padlock plate is in the first position, insertion of the circuit breaker body is permitted. On the other hand, when the padlock plate is in the second position, the presence of the padlock plate prevents insertion of the circuit breaker body. Then, when the padlock plate is rotated to the second position and the locking hole is locked, the lock and the shutter lever are engaged, thereby fixing the shielded state of the shutter.

Operation When the circuit breaker body is inserted into the fixed frame under normal conditions, the circuit breaker body presses the pressing part of the shutter lever during insertion and rotates the shutter lever. In response, the shutter slides to release its shield.

If an attempt is made to manually slide the shutter with the circuit breaker main body extracted, the lock lever will engage with the engaging portion of the mounting board. Therefore, rotation of the shutter lever is prohibited, and sliding of the shutter is prohibited.

If the locking hole of the padlock plate is locked with the circuit breaker body extracted, the presence of the padlock plate will prevent the circuit breaker body from being inserted into the fixing frame. Furthermore, even if an attempt is made to slide the shutter in this state, since the lock and the shutter lever are engaged, the shutter will not be able to slide.

Embodiment FIGS. 2A, 2B, and 2C are partially sectional side views of an extraction type circuit breaker to which an embodiment of the present invention is applied. Also, 3rd A
3B and 3C, there are shown partially sectional plan views of the extraction type circuit breaker of FIGS. 2A-2C. Figures 2A and 3A show the circuit breaker body in the disconnect position, Figures 2B and 3B show the circuit breaker body in the test position, and Figures 2C and 3C show the circuit breaker body in the test position. The circuit breaker body is shown in the connected position.

Referring to these figures, an extraction type circuit breaker main body 1 is provided with movable main circuit connectors 2 and 2' on the power supply side and load side, and a movable side control circuit connector 3. The extraction fixed frame 4 is provided with a terminal block 5 made of an insulating material. On this terminal block 5, 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' are attached. Also, as shown,
A fixed-side control circuit connector 9 corresponding to the movable-side control circuit connector 3 is provided on the fixed frame 4 via a fixed-side mounting plate 7 and a holder member 8 . In this way, the movable side main circuit connectors 2, 2' and the fixed side main circuit connectors 6, 6' form the primary disconnection section of the circuit breaker, and the movable side control circuit connector 3 and the fixed side control The circuit connector 9 forms the secondary disconnection part of the circuit breaker. FIG. 2A and FIG. 3A are extracted states in which both the primary disconnection section and the secondary disconnection section are not connected. Figures 2B and 3B are
This is a test position where the secondary disconnector is connected but the primary disconnector is not. 2C and 3C are connection positions where the primary disconnection section and the secondary disconnection section are both connected.

A control circuit connector shutter 10 is provided between the movable side control circuit connector 3 and the fixed side control circuit connector 9.
is placed. Shutter 1 for this control circuit connector
0, when the circuit breaker main body 1 is inserted into the fixed frame 4, an operation is performed in which the front surface of the fixed side control circuit connector 9 is automatically opened in accordance with the insertion operation.

Further, as shown in the figure, between the movable main circuit connector 2 on the power supply side and the fixed main circuit connector 6, there is a fixed shutter 11a formed of an insulating material.
and a movable shutter 11b are arranged. Similarly, a fixed shutter 11a' and a movable shutter 11b' made of an insulating material are arranged between the movable main circuit connector 2' on the load side and the fixed main circuit connector 6'. be done.

7 is a front view of the movable shutters 11b and 11b' shown in FIGS. 2 and 3, and FIG. 8 is a side sectional view of FIG. 7. Reference is made to these figures and to FIGS. 2 and 3. The fixed side shutters 11a and 11a' are fixed to the fixed frame 4. As shown in the figure, each of the fixed side shutters 11a and 11a' has vertically long rectangular cut-out holes 12a and 1 at positions corresponding to the fixed side main circuit connectors 6 and 6'.
2a' is formed. In addition, the fixed side shutter 1
The movable shutters 11b, 11b' located on the front side of the shutters 1a, 11a' are also formed with vertically long rectangular cut-out holes 12b, 12b', respectively.

As shown in FIGS. 7 and 8, an L-shaped support member 13 extending across the width of the fixed frame 4 is installed at the upper end of the fixed shutter 11a. Further, an L-shaped support member 13' extending across the width of the fixed frame 4 is also installed at the lower end of the fixed shutter 11a'.
Then, the upper end of the fixed side shutter 11a and the U
The letter-shaped guide member 15 is connected, for example, via a screw,
It is fixed to the L-shaped support member 13. Similarly, the fixed side shutter 11a' and the U-shaped guide member 15' are
For example, via a screw, the other L-shaped support member 1
3' is fixed. Upper and lower fixed side shutters 11a
A U-shaped support member 14 is disposed at the boundary between and 11a'. This U-shaped support member 14
As shown in the figure, there is a U-shaped guide member 16.
is fixed, for example, via screws. One movable shutter 11b is disposed between the U-shaped guide member 15 and the U-shaped guide member 16, and is capable of sliding laterally. The other movable shutter 11b' is arranged between the U-shaped guide member 16 and the U-shaped guide member 15', and is also capable of sliding laterally. In addition, the movable shutter 1
1b and 11b', the pair of ends of the U-shaped guide member 16 are bent upward and downward, respectively, as shown in FIG.

As shown in FIGS. 7 and 8, a connecting piece 18a is attached to the lower left end of the movable shutter 11b, and a shutter actuating unit body 17a is connected to this connecting piece 18a. The shutter actuating unit body 17a is fixedly attached to the side wall of the fixed frame 4 via screws. In addition, the movable shutter 1
A connecting piece 18b is provided at the upper right end of 1b',
The shutter operating unit body 17 is attached to this connecting piece 18b.
b are concatenated. Shutter operating unit body 17b
is fixedly attached to the side wall of the fixed frame 4 via screws. As shown in FIG. 7, a shutter spring 19 is disposed between the movable shutters 11b and 11b' located above and below. This shutter spring 19
7, the movable shutter 11b located above is always urged to move rightward in FIG.
1b' is always urged to move to the left in the figure.

The shutter actuating unit bodies 17a, 17b are configured to be able to slide the movable shutters 11b, 11b', respectively, in response to the insertion and extraction operations of the circuit breaker body 1.

The states shown in FIGS. 2A, 3A, and 7 show the circuit breaker body 1 being extracted from the fixed frame 4. In this state, as is clear from FIGS. 3A and 7, the cutout hole 12b of the movable shutter 11b on the power supply side and the cutout hole 12a of the fixed shutter 11a are in a positional relationship that is shifted from each other. . Therefore, the space between the fixed side main circuit connector 6 and the movable side main circuit connector 2, which serve as charging parts, is shielded. Similarly, the cutout hole 12b' of the movable shutter 11b' on the load side and the fixed shutter 11
Since the cutout holes 12' of a' are in a mutually shifted positional relationship, the space between the fixed side main circuit connector 6' and the movable side main circuit connector 2' is also shielded. The aforementioned shutter spring 19 acts to always constrain the movable shutters 11b and 11b' to this shielding position.

As shown in FIGS. 2B, 2C, 3B and 3C, when the circuit breaker body 1 is inserted into the fixed frame 4, the shutter actuating unit body 17a,
17b operates, and the movable shutters 11b, 11
Slide b′. And finally, the cutout hole 12a
and 12b are aligned, and the fixed side main circuit connector 6 and the movable side main circuit connector 2 are connected. Similarly, the cutout holes 12a' and 12b' are aligned, and the fixed side main circuit connector 6' and the movable side main circuit connector 2' are connected.

1A, 1B, and 1C show partial cross-sectional plan views of the shutter actuating unit body 17a, and FIG. 4 shows the shutter actuating unit body 17a.
An exploded perspective view of a is shown. Further, FIG. 5 shows a side view of the shutter actuating unit body 17a. Note that FIG. 1A shows the line -
This is also a view along the line. Since the shutter actuating unit bodies 17a and 17b shown in FIGS. 3 and 7 have substantially the same construction, only one shutter actuating unit body 17a will be explained below.

The shutter actuating unit body 17a is mounted on the mounting board 2.
0, shutter lever 21, and lock lever 22
, lock lever spring 23, and padlock plate 24
and a padlock plate spring 25.

The mounting board 20 is formed in a roughly U-shape, and has a bent engagement part 20 at one end thereof.
It has a. This mounting board 20 has screws 2
It is fixed to the fixed frame 4 via 6 and 27.

A shutter lever 21 whose overall shape is approximately U-shaped and a plate-shaped padlock plate 24 are rotatably attached to the mounting board 20 via a pin 28. The shutter lever 21 includes a long side 21a and a short side 21b defining parallel sides, and narrow sides 21c and 21d. Long side part 21a
is longer than the short side portion 21b. Pincer part 2
No wall is formed in the portion between 1c and 21d. Further, a pin 29 is attached to one end of the shutter lever 21. This pin 29 is positioned within the engagement recess 30 of the connecting piece 18a fixed to the shutter 11b. thus,
The shutter lever 21 and the shutter 11b are connected to each other via a pin 29 and a connecting piece 18a. The shutter 11b is always urged to move in the direction indicated by arrow A by the action of a shutter spring 19 shown in FIG.
The state shown in Figure 1A is the same as that shown in Figures 2A and 3.
This corresponds to the states shown in Figures A and 7. In other words, when the shutter lever 21 is in the position shown, the shutter 11b is in the shielding position.

Padlock plate 24 is rotatable between a first position shown in FIG. 1A and a second position shown in FIG. The padlock plate spring 25, which is a torsion spring arranged to wind the pin 28, has one end connected to the padlock plate 24, and the other end abuts against the pinched side 21d of the shutter lever 21. ing. This padlock plate spring 25 biases the padlock plate 24 to always rotate clockwise in the figure, that is, to always return the padlock plate 24 to the first position shown in FIG. 1A. There is. When the padlock plate 24 is in the first position shown in FIG. 1A, insertion of the circuit breaker body 1 into the fixing frame 4 is permitted. On the other hand, when the padlock plate 24 is in the second position shown in FIG. 6, the presence of the padlock plate 24 prevents the circuit breaker body 1 from being inserted.

The shutter lever 21 includes a pressing portion 21e formed in an arc shape approximately at the center thereof. This pressing portion 21e is pressed by a pressing plate 32 fixed to the circuit breaker body 1 when the circuit breaker body 1 is inserted into the fixed frame 4. Figure 1A, Figure 1B
As can be seen by following the figures and FIG. 1C in order, when the pressing portion 21e is pressed against the circuit breaker body 1, the shutter lever 21 resists the force of the shutter spring 19 (see FIG. 7). Rotate counterclockwise. In response, the shutter 11b slides to release its shielding.

The lock lever 22 is bent into a substantially U-shape, and is rotatably attached to the shutter lever 21 via a pin 33. The lock lever 22 has an arcuate surface 22a that partially overlaps the pressing portion 21e of the shutter lever 21, as shown in FIG. 1A.

The lock lever 22 also has a rotation restriction hole 34.
is provided. A stopper pin 35 fixedly attached to the shutter lever 21 is inserted through the rotation restriction hole 34 . The diameter of the stopper pin 35 is smaller than the diameter of the rotation restriction hole 34. Therefore, the lock lever 22 can be rotated only within the range in which the stopper pin 35 and the rotation restriction hole 34 can move relative to each other. Specifically, the lock lever 22 is rotatable between a first position shown in FIG. 1A and a second position shown in FIG. 1B. The lock lever spring 23, which is a torsion spring arranged around the pin 33, has one end engaged with the lock lever 22 and the other end engaged with the stopper pin 35. Thus, the lock lever spring 23 always urges the lock lever 22 to rotate counterclockwise in the drawings, that is, to always return the lock lever 22 to the first position shown in FIG. 1A.

The lock lever 22 is connected to the engaging portion 2 of the mounting board 20.
It has an engaging leg portion 22b that can be engaged with Oa.
The shapes of the engaging leg portion 22b of the lock lever 22 and the aforementioned arcuate surface 22a are selected so as to satisfy the following conditions. That is, if the shutter 11b is slid while the lock lever 22 is in the first position shown in FIG. 1A, the lock lever 2
The second engaging leg portion 22b abuts and engages with the engaging portion 20a of the mounting board. As a result, the shutter lever 2
1 is prohibited from rotating, so the shutter 11b
Sliding is prohibited. On the other hand, the lock lever 22 is pressed by the pressing plate 32 of the circuit breaker main body 1 and the first
When in the second position shown in Figure B, the engagement leg portion 22b of the lock lever 22 and the engagement portion 20a of the mounting board 20 are disengaged.

Next, the operation of the shutter actuating unit body 17a will be explained using FIG. 1A, FIG. 1B, FIG. 1C, and FIG. 6.

As shown in FIG. 1A, the circuit breaker main body 1 is
In the extracted state in which it is not in contact with the shutter operating unit body 17a, the movable shutter 11b is restrained to its shielding position by the action of the shutter spring 19 (see FIG. 7). And in that state,
When the shutter 11b is manually slid to release its shielding, the engaging leg portion 22b of the lock lever 22 comes into contact with the engaging portion 20a of the mounting board 20. Therefore, the shutter lever 21 is prohibited from rotating, and at the same time, the sliding movement of the shutter 11b is also prohibited. In this way, the shutter 11b in the shielded state will not open due to careless manual operation, and therefore safety is maintained without exposing the live part of the primary disconnection section.

When the circuit breaker body 1 is inserted into the fixing frame 4 from the state shown in FIG. 1A, first the circuit breaker body 1
The pressing plate 32 is the circular arc surface 22a of the lock lever 22.
comes into contact with. Then, when the circuit breaker body 1 is further pushed in, the lock lever 22
When pressed, it rotates clockwise as shown in FIG. 1B, and disengages from the engagement portion 20a of the mounting plate 20.

If the circuit breaker main body 1 is further inserted from the state shown in FIG. 1B, the pressing plate 3 of the circuit breaker main body 1
2 comes to press the pressing portion 21e of the shutter lever 21. As a result, the shutter lever 21
rotates counterclockwise about the pin 28 as a fulcrum. At the same time, the shutter 11b slides against the force of the shutter spring 19, and finally reaches the state shown in FIG. 1C. In the state shown in FIG. 1C, the cutout hole 12b of the movable shutter 11b and the cutout hole 12a of the fixed shutter 11a are aligned. That is, the state shown in FIG. 1C is a state in which the shutter 11b is unshielded. Therefore, if the circuit breaker body 1 is further inserted, the movable main circuit connector 2 and the fixed main circuit connector 6 will be connected.

When extracting the circuit breaker body 1 from the fixed frame 4, the operation opposite to that described above is performed.

Next, when trying to prevent the shutter 11b from opening due to careless manual operation while the circuit breaker main body 1 is being carried out from the fixed frame 4, the padlock plate 24 is It is rotated against the force of the spring 25 to the second position shown in FIG. In that state, the padlock plate 24
One end 24a of is in contact with the mounting board 20.
A lock 36 is then locked into the locking hole 31 formed at the other end of the padlock plate 24 as shown by imaginary lines in FIG. Then, this lock 36
The shutter lever 21 is engaged with the shutter lever 21 as shown in FIG. 6, and rotation of the shutter lever 21 is thereby prohibited. Therefore, even if an attempt is made to open the shutter 11b by manual operation, the presence of the lock 36 reliably prevents the shutter 11b from rotating.

Further, even if an attempt is made to insert the circuit breaker main body 1 into the fixed frame 4 in the state shown in FIG. 6, the presence of the padlock plate 24 prevents the insertion. Therefore, accidents caused by insertion during inspection can be prevented.

In the embodiment described above, the movable shutter 11
Although b and 11b' are of a mechanism that opens laterally, they may also be of a mechanism that opens vertically. Such examples are shown in FIGS. 9-14. That is, FIGS. 9A, 9B, and 9C show partially sectional side views of an extraction type circuit breaker to which another embodiment of the present invention is applied. Figure 9A shows the circuit breaker body 1 in the disconnected position, Figure 9B shows the circuit breaker body 1 in the test position, and Figure 9C shows the circuit breaker body 1 in the connected position. It shows the state in . Note that in each of these figures, the same reference numerals as those in the above-described embodiments indicate the same or corresponding elements, so the explanation thereof will be omitted.

As shown in the figure, in this embodiment, the movable shutters 11b, 11b' are vertically slidable. A shutter operating unit body 40 is provided which is configured to slide the shutters 11b, 11b' in accordance with the insertion and extraction operations of the circuit breaker body 1.

FIG. 10 shows a connecting portion between the shutter actuating unit body 40 and one movable shutter 11b. Further, FIGS. 11 and 12 show side views of the shutter actuating unit body 40. As shown in FIGS. Furthermore, FIG. 13 shows a bottom view taken along the center line - of FIG. 12.

With reference to FIGS. 9 and 10, the fixed side shutters 11a, 11a' and the movable side shutter 11
b, 11b' are provided with horizontally long rectangular cut-out holes 12a, 12a' and 12b, 12b', respectively. Cutout holes 12a, 12 of fixed side shutter
a' and the cutout holes 12b, 12b' of the movable shutter are vertically shifted from each other when the circuit breaker body 1 is extracted. This maintains the shutter in a shielded state. Then, when the circuit breaker body 1 is inserted into the fixed frame 4 from this state, the movable shutter 11
b and 11b' move in the vertical direction, and the cutouts 12b and 12b' of the movable shutter and the cutouts 12a and 12a' of the fixed shutter coincide and open. In this state, the primary disconnection section is connected.

As shown in FIG. 10, the movable shutter 11
A connecting plate 41 is fixed to one end of b, 11b'. The connecting plate 41 has two guide holes 42 and 43 extending in the vertical direction. This guide hole 4
Guide pins 44 and 45 implanted in the fixed frame 4 are inserted through the pins 2 and 43, respectively. And the presser plate 46
However, these guide pins 44 and 45 are connected via screws 47.
are attached so as to connect them to each other. thus,
The shutters 11b, 11b' have guide holes 42, 43
slides in the vertical direction while being guided by guide pins 44 and 45. Normally, the movable shutter 11b, 1
A shutter spring 19 is installed between 1b' and the fixed frame 4. This shutter spring 19 always restrains the movable shutters 11b, 11b' in the shielding position. In addition, in this embodiment, the movable shutters 11b, 1
Rather than disposing the shutter spring 19 between the shutter spring 1b' and the fixed frame 4, a pair of movable shutters 11
A shutter spring 19 is arranged between b and 11b'. This shutter spring 19 constrains the pair of movable shutters 11b and 11b' in opposite directions.

The shutter actuating unit body 40 includes a mounting board 48 and a shutter lever 4, as in the above-described embodiment.
9, 50, lock levers 51, 52, lock lever springs 53, 54, and padlock plates 55, 5.
6, and padlock plate springs 57, 58. The difference from the above-mentioned embodiment is that the pair of shutter levers 49, 50, etc. are mounted on one mounting board 4.
8. The padlock plates 55 and 56 are connected to the mounting board 4 via pins 59 and 60.
The padlock plates 55, 56 are rotatably attached to the padlock plate 8, and the pivot portions of the padlock plates 55, 56 are bent in a U-shape to form bent pieces 55c, 56c.
The shutter levers 49, 50 are housed in the bent pieces 55c, 56c with the pin 5
It is rotatably attached to the mounting board 48 via pins 9 and 60.

Further, as shown in FIG. 11, the pressing plate 61 provided so as to protrude from the back side of the circuit breaker body 1 is positioned in such a manner that it can be inserted into the space of the shutter actuating unit body 40. There is.

Next, the operation of the embodiment shown in FIGS. 9 to 14 will be explained.

As shown in FIGS. 9A and 11, when the circuit breaker main body 1 is extracted from the fixed frame 4, the movable shutters 11b and 11b' are constrained to each other by the action of the shutter spring 19, and The front surfaces of the main circuit connectors 6, 6' are shielded.

In this state, even if the movable shutters 11b, 11b' are slid by manual operation, the engaging portions 48 of the lock levers 51, 52 and the mounting board 48
a is engaged, so its sliding is prohibited.

Next, when the circuit breaker main body 1 is inserted from the state shown in FIG. 9A and FIG. Press. This pressing force causes the lock levers 51, 52 to rotate and disengage from the engagement portion 48a of the mounting board 48. This state is shown in FIG.
is shown above. When the circuit breaker main body 1 is further inserted, the shutter levers 49 and 50 are pressed by the pressing plate 61 and rotated. As the shutter levers 49, 50 rotate, the movable shutters 11b, 11b' slide to release their shielding state. This state is the 12th
In the figure, it is shown below the center line.

When attempting to prevent the circuit breaker body 1 from being inserted while the circuit breaker body 1 has been extracted from the fixed frame 4, the padlock plates 55 and 56 are rotated as shown in FIG. , lock 63 in lock hole 62
to be locked.

Effects of the invention As described above, according to this invention, there is a function to release the shutter when the circuit breaker main body is inserted into the fixed frame, and a function to release the shutter when the circuit breaker main body is extracted from the fixed frame. A shutter that has the function of returning to the shielded state, the function of preventing the shutter in the shielding state from being opened by human operation, and the function of locking the shutter to prevent insertion of the circuit breaker body due to erroneous operation. Since the operating mechanism is integrated into a unit, the shutter device can be easily installed and assembled.

[Brief explanation of the drawing]

Figures 1A, 1B, and 1C are partial sectional plan views of the shutter actuating unit body, which is the main component of this invention, and Figure 1A shows the circuit breaker body extracted. , FIG. 1B shows the circuit breaker body inserted and in the test position, and FIG. 1C shows the circuit breaker body further inserted and in the connection position. 2A, 2B, and 2C are partial cross-sectional side views showing an example of an extraction type circuit breaker to which an embodiment of this invention is applied, and FIG. 2A is a disconnection position of the circuit breaker body. FIG. 2B shows the test position of the circuit breaker body, and FIG. 2C shows the connection position of the circuit breaker body. Figure 3A, 3rd
Figures B and 3C are partial sectional plan views of the extraction type circuit breaker of Figures 2A to 2C, with Figure 3A showing the disconnection position of the circuit breaker body, and Figure 3B showing the circuit breaker. The test position of the body is shown, and FIG. 3C shows the connection position of the circuit breaker body. FIG. 4 is an exploded perspective view of the shutter actuating unit body 17a shown in FIG. 1A. FIG. 5 is a side view of the shutter actuating unit body 17a. 6th
The figure shows the padlock plate 24 shown in FIG. 1A.
It is a figure which shows the state after it was rotated to the 2nd position. FIG. 7 is a front view of the shutters 11b and 11b' shown in FIGS. 2 and 3. FIG. 8 is a side sectional view of FIG. 7. 9A, 9B, and 9C are partial cross-sectional side views showing examples of extraction type circuit breakers to which other embodiments of the present invention are applied, and FIG. 9A is a disconnection line of the circuit breaker main body. FIG. 9B shows the test position of the circuit breaker body, and FIG. 9C shows the connection position of the circuit breaker body. FIG. 10 is a perspective view showing a connecting portion between the shutter 11b and the shutter actuating unit body 40 shown in FIG. 9A. FIG. 11 shows a shutter operating unit body 40.
FIG. FIG. 12 is a side view of the shutter actuating unit body 40, in which the circuit breaker body presses and rotates the lock lever above the center line, and the part above the center line shows a state in which the lock lever is rotated;
The lower part shows a state in which the circuit breaker body presses the shutter lever and rotates it. 13th
The figure is a bottom view taken along the center line - of FIG. 12. FIG. 14 is a view showing the padlock plate shown in FIG. 11 after it has been rotated to the second position. In the figure, 1 is the extraction type circuit breaker main body, 2,
2' is the movable side main circuit connector, 4 is the extraction fixed frame,
6, 6' are fixed side main circuit connectors, 11b, 11
b' is a movable shutter, 17a and 17b are shutter operating unit bodies, 19 is a shutter spring, 20 is a mounting board, 21a is an engaging part of the mounting board, 21 is a shutter lever, 21e is a pressing part of the shutter lever,
22 is a lock lever, 23 is a lock lever spring,
24 is a padlock plate, and 25 is a spring for the padlock plate.

Claims (1)

[Scope of Utility Model Registration Claim] A movable side main circuit connector provided on the circuit breaker main body, a fixed side main circuit connector provided on the fixed frame side in correspondence with the movable side main circuit connector, On the fixed frame side, when the circuit breaker main body is in the extracted state, the front surface of the fixed main circuit connector is shielded, and when the circuit breaker main body is inserted into the fixed frame, the front surface of the fixed main circuit connector is shielded. a shutter provided so as to be slidable so as to open the circuit breaker; a shutter spring that always restrains the shutter in the shielding position; and a shutter that is slidable in response to insertion and extraction operations of the circuit breaker main body. A shutter device for an extraction type circuit breaker, comprising: a shutter actuating unit body configured as shown in FIG. , a shutter lever rotatably attached to the mounting board and one end of which is connected to the shutter, the shutter lever is configured to interrupt the circuit when the circuit breaker main body is inserted into the fixed frame. The shutter lever includes a pressing part that is pressed by the container body, and when the pressing part is pressed, the shutter lever rotates, and the shutter slides accordingly to release its shielding. , the shutter actuating unit body further includes a first
a lock lever attached to the shutter lever so as to be able to rotate between a position and a second position; a lock lever spring that biases the lock lever to always return the lock lever to the first position;
the locking lever is in the first position when the circuit breaker body is extracted, and the locking lever is in the first position when the circuit breaker body is inserted into the fixed frame. The lock lever is rotated to the second position by being pressed, and the lock lever is configured such that the shutter is slidably operated when the lock lever is in the first position. If the lock lever engages with an engaging portion formed on the mounting board, thereby inhibiting sliding of the shutter, while the lock lever engages with an engaging portion formed on the mounting board, and
The shape of the shutter actuating unit body is selected so that the engagement between the lock lever and the engaging portion can be released when the shutter actuating unit body is in the first position.
a padlock plate that is attached to the mounting board and has a locking hole so as to be rotatable between the first position and the second position; and the padlock plate is always rotated back to the first position. a padlock plate spring that biases the padlock plate so that when the padlock plate is in the first position, insertion of the circuit breaker body is allowed; and when the padlock plate is in the second position, insertion of the circuit breaker body is permitted; The presence of the padlock plate prevents insertion of the circuit breaker, and when the padlock plate is rotated to the second position and the locking hole is locked, the lock is locked. and the shutter lever engage with each other, thereby fixing the shielding state of the shutter.