JP2008043156A - Drawer-type circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drawer-type circuit breaker which does not require attachment of exact dimensions and delicate adjustment. <P>SOLUTION: The circuit breaker includes a guide rail 2, a sliding plate 24 having engaging holes 24b, 24d, a trip shaft 14, a stopper lever 6, a release lever 5 which releases the engagement of the stopper lever through a coupling means 9, a stopper 10 which stops the release lever and the stopper lever in an inverted state, a trip interlocking plate 11 which interlocks with the stopper lever, a trip lever 17, which rotates with the trip shaft, an interlocking lever 19, and a spring 20 which integrates the trip lever and the interlocking lever by a fitting/fixing means 21. The stopper lever includes fitting/fixing edges 6a, 6e, inclined sliding edges 6b, 6d, and an end 6c, and stops movement of the body, when engaged with the engaging holes. The interlocking lever rotates independently of the trip lever on the same shaft which is different from the trip shaft, following the trip interlocking plate, and the trip shaft is rotated in the off direction, when the body of the circuit breaker is moved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drawer-type circuit breaker comprising a drawer frame and a breaker body, and more particularly to a drawer-type circuit breaker provided with a safety device that prevents the breaker body from being turned on when the breaker body is moved.

The drawer-type circuit breaker includes a drawer frame and a breaker body that moves in the drawer frame. The drawer frame includes a main circuit terminal connected to a power source and a load and an auxiliary circuit terminal for control and display. The circuit breaker body includes a main circuit terminal and an auxiliary circuit terminal on the body side that automatically come into contact with and separate from the terminals of the drawer frame by moving in the drawer frame. This circuit breaker body has a connection position where both main circuit terminals and both auxiliary circuit terminals are in contact, a test position where only both auxiliary circuit terminals are in contact, and both main circuit terminals and auxiliary circuit terminals are both disconnected. Move between each position of disconnection position.
Such a pull-out type circuit breaker cannot be moved without turning off the circuit breaker body and the automatic stop device or circuit breaker body so that it can be accurately stopped at each position while moving the circuit breaker body. A safety device is provided to prevent this.

  A conventional technique of such a drawer type circuit breaker is disclosed in Patent Document 1. This prior art will be described with reference to FIG. The circuit breaker main body has a contactor and an opening / closing mechanism which are configured between the side plates facing each other and the side plates, which are not shown. The opening / closing mechanism includes a trip shaft 51 that trips the breaker body by turning counterclockwise to turn it off. On the outside of the side plate, a movable slide plate 50 and an operation pin 52 attached to the tip of a lever (not shown) that rotates with the trip shaft 51 are provided.

On the other hand, the drawer frame houses the circuit breaker body between opposed frame side plates (not shown), and is attached to the inside of the frame side plate, a guide rail 53, a stopper lever 55 supported by the shaft 54, and a shaft 56. Is provided with a release lever 57, a tension spring 58 attached between the stopper lever 55 and the release lever 57, and a trip interlocking plate 59.
The breaker body is movable in the left-right direction as the movable slide plate 50 is guided by the guide rail 53. The stopper lever 55 has a bifurcated arm 55a and an engaging piece 55b, and the release lever 57 is provided with an operation pin 60a and an operation pin 60.

  In FIG. 5A, the engaging piece 55 b of the stopper lever 55 urged counterclockwise passes through the cutout hole 53 b of the upper side surface 53 a of the guide rail 53 and corresponds to the connection position of the movable slide plate 50. The circuit breaker body is stopped at the connection position by being fitted into the fitting hole 50a. At this time, the operation pin 60 of the release lever 57 biased in the clockwise direction is fitted in the parallel groove of the bifurcated arm 55 a of the stopper lever 55. The trip interlocking plate 59 connected to the stopper lever 55 is located above the movement range. For this reason, although not shown in FIG. 5A, the operation pin 52 is separated from the trip interlocking plate 59.

In order to move the breaker body to the test position, the release lever 57 is rotated counterclockwise. By this rotation, the operation pin 60 pushes up the upper inner edge of the parallel groove of the bifurcated arm 55a, and the stopper lever 55 rotates in the clockwise direction. By this rotation, the tip of the engagement piece 55b of the stopper lever 55 is lifted, and is brought into a state of being shallowly fitted with the fitting hole 50a of the movable slide plate 50. This state is shown in FIG.
This state is a reverse state that exceeds the dead point that does not return to the state of FIG. 5A even if the hand is released from the release lever 57 and is in a free state. That is, the operation pin 60 is in contact with the inclined edge formed at the tip of the bifurcated arm 55 a of the stopper lever 55. The direction of the force of the pulling spring 58 acting on the operating pin 60 via this contact is the direction of biasing the release lever 57 counterclockwise, and the force biases the release lever 57 clockwise by the pulling spring 58. Greater than the power to do. For this reason, the release lever 57 comes into contact with the upper side surface 53a of the guide rail 53 serving as a stopping means and stops, and the state shown in FIG. 5B is maintained. At this time, the trip interlocking plate 59 is in a position where the operating pin 52 is pushed downward, the trip shaft 51 rotates counterclockwise, the circuit breaker body is turned off, and cannot be turned on.

  When the circuit breaker body is moved leftward from the state shown in FIG. 5B, at the initial stage, the right inclined edge of the engagement piece 55b is pushed by the right end edge of the fitting hole 50a of the movable slide plate 50, and the stopper The lever 55 rotates clockwise. By this rotation, the operating pin 60 moves from the inclined edge of the tip of the bifurcated arm 55a beyond the dead point to the parallel groove, and the inverted state is eliminated. By this movement, the release lever 57 rotates in the clockwise direction by the force of the tension spring 58. The tip of the engagement piece 55 b of the stopper lever 55 is pressed against the upper side surface of the movable slide plate 50. The trip shaft 51 is not in a state in which the circuit breaker body can be turned on by rotating counterclockwise.

FIG. 5C shows a state where the circuit breaker body is moved leftward from this state. In FIG. 5C, the tip of the engagement piece 55 b of the stopper lever 55 is in a position where it slides on the upper side surface of the movable slide plate 50. When further moved, the engagement piece 55b of the stopper lever 55 is fitted into the fitting hole 50b corresponding to the test position, and the circuit breaker body stops at the test position. In this state, the circuit breaker body can be turned on similarly to the connection position.
When moved in the disconnection position direction as in the case of moving from the connection position to the test position, the engagement piece 55b of the stopper lever 55 is fitted into the fitting hole 50c corresponding to the disconnection position, and the breaker body is in the disconnection position. Stop. The ON operation is possible even at this disconnection position.

  When the breaker body is moved rightward, for example, when moving from the test position to the connection position, the release lever 57 is operated so that the engagement piece 55b and the engagement hole 50b are shallowly engaged as described above. To the inverted state. When the breaker body is moved to the right, the left inclined edge of the engagement piece 55b is pushed by the left end edge of the fitting hole 50b and the stopper lever 55 rotates in the clockwise direction. Disappears. When further moved, the engagement piece 55b of the stopper lever 55 is fitted into the fitting hole 50a corresponding to the connection position and stops at the connection position.

  In addition, what is necessary is just to move to the left direction as said inversion state, when taking out a circuit breaker main body from a disconnection position. In addition, when the circuit breaker body taken out is attached to the drawer frame, the reverse state is canceled by sliding the right end portion of the movable slide plate 50 (not shown) on the left inclined edge of the engagement piece 55b. Then, the tip of the engagement piece 55b slides on the movable slide plate 50. When the circuit breaker body is to be attached in the ON state, the inclined edge 61 at the tip of the trip interlocking plate 59 pushes down the operation pin 52 at the ON position downward to automatically turn off the circuit breaker body.

When a drawer type circuit breaker as described above is used for many years, it is often replaced with a new type of breaker having a different size. For this replacement, it may be necessary to replace the conductive band connected to the drawer frame in accordance with the dimensions of the new model. In this case, it will be a major remodeling work of the switchboard, which requires excessive expenses and a long power outage time. In order to eliminate such problems, a withdrawal circuit breaker for retrofit is provided. This retrofit circuit breaker includes an existing drawer frame, a new circuit breaker main body, and an attachment member for matching the both.
Japanese Utility Model Publication No. 53-19944

  The trip shaft 51 of the draw-out type circuit breaker disclosed in the above-mentioned Patent Document 1 is rotated in the trip direction by an internal stopper and turned off the breaker main body for reasons of size. Some are limited to reduce extra rotation. Such a trip shaft 51 is damaged if it is urged to rotate even after contacting the stopper. For example, when the trip interlock plate 59 moves the operating pin 52 excessively when the operation of moving the circuit breaker body is performed as described above, the trip shaft 51 is energized even after contacting the stopper. It becomes.

In a drawer type circuit breaker in which the drawer frame and breaker body are produced as a pair, ensuring that the operating pin 52 does not move excessively ensures the safety and the production cost. In the production stage, it was possible to achieve the optimal configuration.
However, in retrofit circuit breakers, it is often impossible to obtain drawings of the existing drawer frame and design data for operation, and the necessary attachments must be manufactured and installed. I had to.
In particular, in order to prevent damage to the trip shaft 51, the trip interlocking plate 59 directly related to the rotation angle of the trip shaft 51, as well as members such as the movable slide plate 50, the guide rail 53, the stopper lever 55, and the release lever 57 are equivalent. It was necessary to manufacture the attachment to be made with extremely accurate dimensions and to perform fine adjustment after installation.
Accordingly, an object of the present invention is to provide a draw-out type circuit breaker mainly for retrofit, which does not require the manufacture of a precise sized attachment or the need for fine adjustment.

  In order to solve the above problems, the invention of claim 1 is characterized in that the drawer frame provided with the guide rail (2) and the fitting holes (24b, 24d) are provided at predetermined positions and can slide along the guide rail. A circuit breaker comprising a breaker body provided with a sliding plate (24), wherein the breaker body is a shaft for tripping the breaker body, and the rotation angle in the trip direction is limited. A provided trip shaft (14) and a lever formed with locking edges (6a, 6e) and biased in a direction to be fitted into the fitting hole, and when the fitting is realized, Fits through the stopper lever (6) attached to the drawer frame that engages the edge (24c, 24e) of the fitting hole to stop the movement of the circuit breaker body and the connecting means (9) when rotated. Drawer frame that rotates the stopper lever in the direction to cancel An attached release lever (5), a stopper (10) for stopping the rotation of the release lever in a reverse state where the connecting portion of the connecting means exceeds the center line formed by the release lever and the stopper lever, and in the reverse state Inclined sliding edge (6b, 6d) formed at a position facing the edge of the stopper lever fitting hole and trip interlock that rotates the trip shaft so that the circuit breaker body is turned off in conjunction with the stopper lever When the circuit breaker body is slid in the inverted state, the stopper lever rotates by sliding the edge of the fitting hole on the inclined sliding edge, and the inverted state is eliminated. Subsequently, the tip (6c) of the stopper lever slides on the slide surface on which the fitting hole of the slide plate is formed. -In a pull-out type circuit breaker in which the interlocking plate rotates the trip shaft in the trip direction when the tip of the slide is on the slide surface of the slide plate, the trip lever ( 17) and an interlocking lever (19) which is provided at a portion eccentric from the trip shaft of the trip lever so as to be independently rotatable on the same axis as the trip lever, and which rotates following the movement of the interlocking plate. And a spring (20) for urging the trip lever and the interlocking lever in opposite directions with respect to their rotational directions, and a latch for locking the trip lever and the interlocking lever biased by the spring in an integrated state. Stop means (21).

The drawer-type circuit breaker according to the first aspect of the present invention has a trip lever and an interlocking lever provided on the same axis and integrated in the rotational direction by a spring. And when operation which moves a circuit breaker main body is performed, a trip lever rotates following the movement of the interlocking | linkage board provided in the drawer frame via the interlocking | linkage lever. The trip lever, the interlocking lever, the trip shaft, and the members that limit the rotation angle of the trip shaft are all members that are attached to the circuit breaker body, so that they can be attached at an accurate position when manufacturing the circuit breaker body. . Therefore, when the circuit breaker body is attached to the drawer frame, the circuit breaker body is moved, and when the movement of the interlocking plate continues even after the rotation of the trip shaft is restricted, only the interlocking lever further rotates. For this reason, even if the movement of the interlocking plate is slightly larger when the circuit breaker body is attached to the drawer frame and the moving operation is performed, the constituent members of the circuit breaker body including the trip shaft are not damaged.
That is, according to the invention of claim 1, even when such a circuit breaker body is attached to a drawer frame in which the member dimensions and the assembly dimensions when the members are attached vary, the member can be processed with such a precise dimension. There is no need to make or fine adjustment during installation, and the circuit breaker body can be moved safely. In particular, it is suitable for application as a circuit breaker for retrofit.

Embodiments of the present invention will be described with reference to the examples shown in FIGS.
FIG. 2 is a drawing-type circuit breaker according to the present embodiment, and is a front view of the main part showing the left end when the breaker body is in the connected position and in the OFF state. FIG. It is a principal part side view seen from -A.
On the frame side plate 1 of the drawer frame, on the guide rail 2, the rotary shaft 3 and the rotary shaft 4 formed by combining two L-shaped bent plates 2a and L-shaped bent plates 2b with a gap in the horizontal direction. The release lever 5 and the stopper lever 6 that are rotatably supported, respectively, the return spring 7 and the return spring 8 that urge the release lever 5 and the stopper lever 6 counterclockwise and clockwise, respectively, and the release lever 5 and the stopper lever 6. Are attached to a link plate 9 for connecting the two, a stopper 10 for restricting the rotation of the release lever 5, and a trip interlocking plate 11 located in the gap between the frame side plate 1 and the L-shaped bending plate 2a in FIG. The trip interlocking plate 11 has a lower end connected to the stopper lever 6 by a pin 12, and is provided in the trip interlocking plate 11 and an elongated hole 2 c in the vertical direction formed at the tip of the L-shaped bending plate 2 a. It can be slid in the vertical direction by the guide means with the guide pin 13.

Inside the breaker body is a part of the opening / closing mechanism not shown in detail, and the trip shaft 14 that turns off the breaker body by rotating counterclockwise in FIG. And a cross bar 15 having different rotation angles when it is OFF and one end thereof projecting to the outside of the side plate 16 of the circuit breaker body.
When the circuit breaker body is in the ON state, the trip shaft 14 is biased counterclockwise by the force of the opening / closing mechanism inside the circuit breaker body, and the rotation is stopped by the internal locking means. When the trip shaft 14 is rotated by a predetermined angle by a trip button (not shown) or the like, the engagement of the locking means is released, the circuit breaker body is turned off, and when the trip button is restored, the trip button is restored. The spring is rotated back in the clockwise direction, and the above engagement state is realized again by the ON operation. Although the trip shaft 14 rotates excessively counterclockwise after the engagement of the locking means is released, this rotation is limited by a stopper member (not shown) so that the rotation angle becomes small. ing.

  A trip lever 17 is attached to a projecting portion of the trip shaft 14 from the side plate 16 so as to be rotatable together with the trip shaft 14. A pin 18 is attached to the end of one arm of the trip lever 17, and an interlocking lever 19 that can rotate on the pin 18 independently of the trip lever 17 is provided on the pin 18. Since both levers are attached to the end portions of both arms with an integrated spring 20 that urges them in the opposite direction with respect to their rotational directions, the engaging means 21 constituted by both levers is engaged. In this case, both levers are integrated.

  An OFF blocking lever 22 that rotates with the cross bar 15 is attached to the protruding portion of the cross bar 15, and an engagement pin 23 is attached to the tip of the arm of the OFF blocking lever 22. Further, a slide plate 24 having an L-shaped cross section is also attached to the outside of the side plate 16, and one side of the L-shape of the slide plate 24 is a horizontal gap formed by two L-shaped bent plates 2a and 2b. The circuit breaker body can be moved along the guide rail 2 by being fitted to the guide rail 2.

  Hereinafter, the operation of this drawer type circuit breaker will be described. First, referring to FIG. 1, both the release lever 5 and the stopper lever 6 are in a return state in contact with the lower surface of the L-shaped bent plate 2 b, and are engaging pieces formed at the tip of the arm of the stopper lever 6. The right locking edge 6 a faces the left end 24 a of the slide surface of the slide plate 24. For this reason, even if it is going to move a circuit breaker main body to the test position direction, the left direction in a figure, the left end edge 24a cannot engage with the right latching edge 6a, and can move. When a force for moving further to the right from the connection position is applied, the movement is blocked by the stopper means that omits detailed description.

  The trip interlocking plate 11 is positioned upward according to the rotation position of the stopper lever 6, and is between the roller 25 provided on the arm of the interlocking lever 19 and the lower surface of the L-shaped bent piece 11 a of the trip interlocking plate 11. There is a gap between the two and the rotation of the trip shaft 14 is not constrained.

  Further, since the engagement pin 23 of the OFF blocking lever 22 is far away from the L-shaped bent engagement plate 26 attached to the trip interlocking plate 11, the trip interlocking plate 11 can be moved downward. Yes. That is, it is possible to operate a release lever 5 described later. However, although not shown, when the circuit breaker body is in the ON state, the OFF blocking lever 22 rotates in the clockwise direction and the engagement pin 23 approaches the engagement plate 26 compared to the state of FIG. For this reason, the trip interlocking plate 11 cannot be moved downward. Therefore, when the circuit breaker body is in the ON state, an operation of operating the trip button or the like to turn off the circuit breaker body is necessary. That is, since the circuit breaker body cannot be moved without a step of confirming the consciousness of turning off the circuit breaker body, an unintended OFF operation can be prevented.

  When the release lever 5 is rotated clockwise with the circuit breaker body in FIG. 1 in the OFF state, the stopper lever 6 rotates counterclockwise via the link plate 9. Then, when the tip of the arm of the release lever 5 contacts the stopper 10, the rotation of both levers stops. One end of the link plate 9 is rotatably supported by the arm of the stopper lever 6 by a pin 27, and the other end of the link plate 9 is provided in the long hole 9 a formed in the other end and the arm of the release lever 5. The pins 28 are connected to each other. Therefore, as described above, when both levers rotate, the pin 28 relatively moves in the elongated hole 9a to the vicinity of the right end thereof, and the dead point where the pin 28 is located on the center line between the rotating shaft 3 and the pin 27. When both levers stop beyond this point, the reversal state is established below the center line. Therefore, when the release lever 5 is in the free state, the pin 28 is engaged with the right end of the long hole 9a and the reverse state is maintained as shown in FIG.

  Referring to FIG. 3, in this inverted state, stopper lever 6 is in a state where the right inclined sliding edge 6 b of the engagement piece faces left end edge 24 a of slide plate 24. Further, the trip interlocking plate 11 moves downward, the L-shaped bent piece 11a pushes the roller 25, and the trip lever 17 and the interlocking lever 19 are integrated and rotated counterclockwise. Due to this rotation, the trip shaft 14 rotates counterclockwise and the locking means inside the opening / closing mechanism cannot be engaged. Therefore, even if the ON operation is performed, the breaker body cannot be turned ON. This state is maintained during the movement of the circuit breaker body as will be described later. At the end of this rotation, the engaging means 21 formed by the trip lever 17 and the interlocking lever 19 may be disengaged, which will be described later.

  In the state of FIG. 3 described above, when the breaker body is moved in the direction of the test position, leftward in the figure, the left end edge 24a of the slide plate 24 slides on the right inclined sliding edge 6b of the stopper lever 6 to stop the stopper. The lever 6 is rotated counterclockwise. As the stopper lever 6 rotates, the pin 27 also rotates about the rotation shaft 4, and the release lever 5 also rotates counterclockwise via the link plate 9 and the pin 28. Then, the pin 28 exceeds the center line, the release lever 5 is further rotated counterclockwise by the acting force of the return spring 7, and the stopper lever 6 is also rotated clockwise, so that the reverse state is canceled.

When the sliding of the left end edge 24 a on the right inclined sliding edge 6 b is finished, the stopper lever 6 is brought into a state in which the distal end portion 6 c of the engagement piece comes into contact with the lower surface of the slide plate 24 by the urging force of the return spring 8. . In this state, when the breaker body is further moved in the left direction, the distal end portion 6 c relatively slides on the lower surface of the slide plate 24. This state is shown in FIG. In the state of FIG. 4, the trip interlocking plate 11 is located further below the state of FIG.
In FIG. 4, when the trip shaft 14 is in contact with a stopper (not shown) inside the circuit breaker body, the rotation of the trip lever 17 that has been rotated integrally with the interlocking lever 19 is stopped. For this reason, the engagement state of the engagement means 21 is canceled, and only the interlocking lever 19 is further rotated independently of the trip lever 17. That is, the engaging means 21 is composed of a window formed on the trip lever 17 and a protrusion formed on the interlocking lever 19 fitted to the window, and a gap is formed between the edge of the window and the protrusion. With such a configuration, even if the amount of downward movement of the trip interlocking plate 11 is somewhat large, the breaker body is not damaged. Thus, the action caused by the disengagement of the engaging means 21 may occur similarly in the state shown in FIG. 3 as described above.

When the breaker body is further moved from the state of FIG. 4, the engaging piece of the stopper lever 6 is fitted into the test position fitting hole 24b of the slide plate 24, and the breaker body automatically stops at the test position. Although the state where the test position has been reached is not shown, the rotation angle of the release lever 5 and stopper lever 6 and the vertical position of the trip interlocking plate 11 are the same as in FIG. 1, and the circuit breaker body can be opened and closed. is there.
If the test position is reached, the right end edge 24c of the test position fitting hole 24b faces the right locking edge 6a of the stopper lever 6, so that the disconnecting position can be achieved only by sliding the circuit breaker body. It cannot be moved in the direction. Further, since the left end edge 24e faces the left locking edge 6e, it cannot be moved in the direction of the connection position only by sliding the circuit breaker body.

  When the circuit breaker body is moved from the test position to the disconnection position direction, the reverse lever 5, the stopper lever 6, and the link plate 9 are formed in an inverted state, similar to the operation of moving from the connection position to the test position. The right end edge 24 c of the test position fitting hole 24 b faces the right inclined sliding edge 6 b of the stopper lever 6. Then, when it is moved in the disconnection position direction, the right end edge 24c of the test position fitting hole 24b relatively slides on the right inclined sliding edge 6b of the stopper lever 6 to rotate the stopper lever 6 counterclockwise. The aforementioned reverse state is eliminated, the tip 6c slides on the lower surface of the slide plate 24, the engagement piece of the stopper lever 6 is fitted into the disconnection position fitting hole 24d, and automatically stops at the disconnection position. When removing the circuit breaker body from the disconnect position, the same operation as moving from the test position to the disconnect position is performed.

  Next, when moving in the reverse direction, for example, when moving from the test position to the connection position, the reverse state by the release lever 5, the stopper lever 6 and the link plate 9 is the same as when moving from the test position to the disconnect position. To form. At this time, the right end edge 24c of the test position fitting hole 24b faces the right inclined sliding edge 6b of the stopper lever 6, and the left end edge 24e of the test position fitting hole 24b is the left inclined sliding edge 6d of the stopper lever 6. Opposite. When the circuit breaker body is moved in the direction of the connection position, the left end edge 24e of the test position fitting hole 24b relatively slides on the left inclined sliding edge 6d of the stopper lever 6, and the stopper lever 6 is counterclockwise. 1 is rotated, and the inverted state is canceled as described above, and the tip 6c slides on the lower surface of the slide plate 24 to be in the connection position state of FIG. The operation from the disconnect position to the test position is the same.

  Although not shown, when the removed breaker body is attached to the drawer frame, the right end of the slide plate 24 is guided after the release lever 5, the stopper lever 6 and the link plate 9 are reversed as described above. Fit into the gap of rail 2. At this time, the right end portion of the slide plate 24 slides on the left inclined sliding edge 6d of the engaging piece of the stopper lever 6, the stopper lever 6 rotates counterclockwise, and the inverted state is canceled, and the tip portion 6c is released. By relatively sliding on the lower surface of the slide plate 24, the engaging piece of the stopper lever 6 is fitted into the disconnection position fitting hole 24d to become the disconnection position. When the circuit breaker body is attached in the ON state, the roller 25 moves on the lower surface of the inclined piece 11b at the tip of the L-shaped bent piece 11a of the trip interlocking plate 11 while moving in the direction of the disconnection position. By doing so, the trip lever 17 and the interlocking lever 19 which are integrated rotate about the trip shaft 14 in the counterclockwise direction, and the circuit breaker body is turned off.

It is a principal part side view when the circuit breaker main body exists in a connection position of the drawer type circuit breaker of the Example by this invention. It is a principal part front view which shows the left end part of the drawer type circuit breaker of FIG. FIG. 2 is a view corresponding to FIG. 1 when a preparatory operation for moving the breaker body is performed. FIG. 2 is a view corresponding to FIG. 1 in the middle of moving the circuit breaker body. It is a principal part side view explaining the movement of the circuit breaker main body of the conventional drawer type circuit breaker.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame side plate 2 Guide rail 2a L-shaped bending plate 2b L-shaped bending plate 2c Long hole 3 Rotating shaft 4 Rotating shaft 5 Release lever 6 Stopper lever 6a Right latching edge 6b Right inclined sliding edge 6c Tip part 6d Left inclined sliding Edge 6e Left locking edge 7 Return spring 8 Return spring 9 Link plate 9a Long hole 10 Stopper 11 Trip interlocking plate 11a L-shaped bent piece 11b Inclined piece 12 Pin 13 Guide pin 14 Trip shaft 15 Crossbar 16 Side plate 17 Trip lever 18 Pin DESCRIPTION OF SYMBOLS 19 Interlocking lever 20 Integrated spring 21 Engagement means 22 OFF prevention lever 23 Engagement pin 24 Slide plate 24a Left end part 24b Test position fitting hole 24c Right end edge 24d Disconnection position fitting hole 24e Left end edge 25 Roller 26 Engagement board 27 Pin 28 pins

Claims (1)

It comprises a drawer frame provided with a guide rail (2) and a breaker body provided with a fitting plate (24b, 24d) at a predetermined position and a slide plate (24) slidable along the guide rail. A drawer type circuit breaker,
A trip shaft (14) provided on the breaker body, which is a shaft for tripping the breaker body, the rotation angle in the trip direction being limited;
A lever formed with a locking edge (6a, 6e) and biased in a direction to be fitted into the fitting hole, and when the fitting is realized, the locking edge and an edge of the fitting hole ( A stopper lever (6) attached to the drawer frame that engages 24c, 24e) and stops the movement of the circuit breaker body;
A release lever (5) attached to the drawer frame for rotating the stopper lever in a direction to release the fitting via a connecting means (9) when rotated;
A stopper (10) for stopping the rotation of the release lever in a reverse state in which the connecting portion of the connecting means exceeds the center line formed by the release lever and the stopper lever;
An inclined sliding edge (6b, 6d) formed at a position facing the edge of the fitting hole of the stopper lever in the inverted state;
A trip interlocking plate (11) that rotates the trip shaft so that the circuit breaker body is turned off in conjunction with the stopper lever;
With
When the breaker body is slid in the reverse state, the stopper lever is rotated by sliding the edge of the fitting hole on the inclined sliding edge, and the reverse state is canceled. The tip (6c) of the stopper lever slides on the slide surface of the slide plate in which the fitting hole is formed, and the tip of the stopper lever is the slide surface of the slide plate when in the inverted state. In a drawer type circuit breaker in which the interlocking plate rotates the trip shaft in the trip direction when it is on the top,
A trip lever (17) provided on the circuit breaker body to rotate with the trip shaft;
An interlocking lever (19) which is provided at a portion eccentric from the trip shaft of the trip lever so as to be independently rotatable on the same axis as the trip lever, and which rotates following the movement of the interlocking plate; ,
A spring (20) for urging the trip lever and the interlocking lever in opposite directions with respect to their rotational directions;
Locking means (21) for locking the trip lever biased by the spring and the interlocking lever in an integrated state;
A drawer type circuit breaker characterized by comprising:

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