JPH09130928A - Position displaying switch device of draw-out type circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate mounting, wiring and maintenance and surely perform operation by moving an operating member provided in a circuit breaker main body when the circuit breaker main body is moved and following it to rotate a lever. SOLUTION: When a circuit breaker main body is in a connected position, a microswitch 20 is in the state of being operated. When the circuit breaker main body is moved toward a test position from that state, a lever 9 is rotated counterclockwise by following the movement of a fixed shaft 8 by the action of a coil spring 15, and a guide pin 10 is rotated clockwise together with a lever 11 along the edge of the guide groove 9a of the lever 9. A lever 13 is rotated clockwise through a link member 14 by following the rotation of the lever 11, the engagement of an actuator 20 with a projection 17a is released, and the microswitch 20 is brought into the unoperated state. Thus, the sure display of a position can be realized without making complicated adjustment and also increasing the width and the depth of a circuit breaker.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position indicating switch device for electrically indicating the position of a breaker body of a drawer type circuit breaker.

[0002]

2. Description of the Related Art A drawer type circuit breaker is one in which a mounting frame is mounted on a fixed frame such as a switchboard, and a main body of the circuit breaker is housed in the mounting frame. It can be pulled out and inserted. The main body of this draw-out circuit breaker is used for relatively large circuit breakers because the main body of the circuit breaker can be removed and maintenance can be performed without removing the electric wire of the main circuit. Done.

The main body of the circuit breaker of the drawer type circuit breaker often has a "connection position" test position "and a" disconnection position "by moving the mounting frame. The "connection position" is the position where the main circuit terminal of the mounting frame and the main circuit terminal of the circuit breaker body are connected together, and the control circuit terminal of the mounting frame and the control circuit terminal of the circuit breaker body are both connected. This is the position where the main circuit, which is a normal function as a circuit breaker, can be opened and closed and energized. The "test position" is a position where only the control circuit terminals are connected, and the circuit breaker body can be electrically operated for inspection of the control circuit, etc., but the main circuit terminals are not connected so that power is not supplied. It is a position that cannot be done. "Disconnect position"
Is a position where neither the main circuit terminal nor the control circuit terminal is connected, and is a position where the circuit breaker main body is in an electrically disconnected state and safe maintenance and inspection can be performed without fear of electric shock.
The circuit breaker body can be removed from the mounting frame by further pulling it out from the “disconnection position”.

Such a draw-out type circuit breaker is often provided with a position indicating switch device for electrically indicating the position of the breaker body, and the conventional technique thereof is shown in FIGS. It is shown in FIG.

In FIG. 6, the circuit breaker main body 51 is housed in the mounting frame 50, and the main circuit side main circuit terminal 52 is mounted in the mounting frame side main circuit terminal 5.
3 is shown in a "connection position" in which the mounting frame 50 and the control circuit terminals of the circuit breaker main body 51 are also connected to each other through the pull-out contactor 54, which is not shown. It shows a state in which the main circuit terminal 52 and the mounting frame side main circuit terminal 53 are separated, and the control circuit terminal is also separated (not shown) in a "disconnection position". The "test position" is located between the "connection position" and the "disconnection position", but the drawing is omitted.

The position display switch device 55 is attached to the rear bottom portion of the mounting frame 50, and the inside of the position display switch device 55 corresponding to the "disconnection position" in FIG. 7 is shown in FIG. In FIG. 8, a box body 56 and an operation plate 57 that inserts through the guide holes 56a and 56b formed in the opposing walls of the box body 56.
And the projection 5 housed in the box 56 and formed on the operating plate 57.
The microswitches 58 and 59 that operate at the “connection position”, the “test position”, and the “disconnection position” depending on 7a.
60, and a coil spring 61 that is stretched between the box body 56 and the operating plate 57 and biases the operating plate 57 in the direction in which the circuit breaker main body 51 is pulled out. In FIG. Engage and micro switch 60
Is operating.

In this conventional technique, the circuit breaker main body 51
Is inserted from the “disconnection position” to the “test position”, the operating plate 57 is pushed rearward by the rear part of the circuit breaker main body 51. Therefore, the actuator of the micro switch 60 and the operating plate 5 are inserted during the insertion.
The engagement with the projection 57a of 7 is released and the micro switch 6
0 becomes inoperative, and then the actuator of the microswitch 59 engages with the protrusion 57a, so that only the microswitch 59 is activated in the “test position”. When the circuit breaker main body 51 is further inserted from the “test position” to the “connection position”, the engagement between the actuator of the micro switch 59 and the protrusion 57a is released in the middle of the operation, the micro switch 59 becomes inoperative, and the micro switch 58 becomes inoperative. The actuator is engaged with the protrusion 57a, and only the microswitch 58 is operated at the "connection position", and the two-dot chain line in FIG.

When the circuit breaker main body 51 is pulled out from the "connection position" to the "test position" and from the "test position" to the "disconnection position", the action plate 57 moves in the pulling direction by the acting force of the coil spring 61, Contrary to the insertion, the microswitch 59 and the microswitch 60 are in a state of sequentially operating.

[0009]

In the conventional position indicating switch device for the draw-out type circuit breaker, the coil spring 61 acts so as to bias one side (rear side) of the operating plate 57 downward, and also the shut-off state. When the container body 51 pushes the operating plate 57, it does not always push the operating plate 57 horizontally.
The operating plate 57 may move diagonally by the amount of play between the guide holes 56a and 56b of FIG. Operating plate 5
Since the operation timing of the micro switch is different between the case where 7 moves horizontally and the case where it moves diagonally, it is necessary to accurately assemble and adjust so that the operation plate 57 can operate normally regardless of how it moves, and productivity is good. There wasn't. Also,
This problem can be solved by adopting a structure in which the above play is restricted to an extremely small value, but when the breaker main body 51 is pulled out, the action force of the coil spring 61 operates due to the frictional force between the guide holes 56a and 56b and the operating plate 57. There is a possibility that the plate 57 will not move in the pull-out direction, and it was difficult to adopt it.

Further, providing this unitized conventional position display switch device in the side surface space between the circuit breaker body 51 and the mounting frame 50 makes the overall width dimension when viewed from the front too large. As shown in FIG. 6 and FIG. 7, it is inevitable to attach it to the rear portion of the attachment frame 50. However, although it is preferable that an appropriate mounting space is formed in the rear portion of the mounting frame 50 as shown in these figures, the lead-out contact 54 is omitted and the main body side main circuit terminal 52 and the mounting frame side main circuit terminal are provided. 5
In the drawer type circuit breaker proposed in Japanese Patent Application No. 5-24222 by the applicant of the present invention, which is designed so that parts corresponding to No. 3 are in direct contact with each other, such an appropriate space is not formed. There is a problem that the position display switch device cannot be attached.

Further, since this conventional device is mounted on the rear bottom portion of the mounting frame 50, there is a problem that wiring and maintenance are difficult.

Therefore, the main object of the present invention is to provide a position indicating switch device for a draw-out type circuit breaker which is easy to install, wire and maintain, operates reliably and does not require a large external size of the circuit breaker. is there.

[0013]

A mounting frame is provided with a first lever and a second lever, and when the circuit breaker body moves in the pull-out or insertion direction, an operating member provided in the circuit breaker body moves, and Following this, the first lever rotates. A guide groove is formed in either one of the first lever and the second lever, and a guide member that engages with the guide groove is provided in the other,
When the first lever rotates, the guide member is guided along the guide groove to rotate the second lever. By providing the mounting frame with a switch that opens and closes according to the rotation angle of the second lever, the position of the breaker body is electrically displayed.

[0014]

In the position indicating switch device for the drawer type circuit breaker according to the present invention, the linear motion of the circuit breaker body is converted into the rotary motion by the first lever. That is, the rotation angle of the first lever from the reference position is determined according to the position of the circuit breaker body. Since the second lever is linked to the first lever,
The rotation angle of the second lever from the reference position is determined according to the rotation angle of the first lever. Therefore, the position can be electrically displayed by arranging the switch that operates at the rotation angle of the second lever corresponding to each position of the circuit breaker body.

With such a structure, a smooth operation is possible without causing harmful friction that restricts the operation of the first lever or the second lever. Also, the engagement angle between the operating member of the circuit breaker body and the first lever or the first
By changing the engagement angle between the second lever and the second lever
Since the rotation angle of the lever of can be freely changed,
The rotation angle of the second lever, that is, the operation timing of the switch can be automatically set according to a predetermined moving distance of the circuit breaker main body. In addition, since the first and second levers can be configured by plate-shaped members, they can be arranged in a small gap between the circuit breaker body and the mounting frame, and the thick switch portion can be used for the first lever and the second lever. It can be freely placed in an appropriate place by connecting the above.

[0016]

1 to 6 are views showing an embodiment of a position indicating switch device for a draw-out type circuit breaker according to the present invention, and FIGS. 1 and 2 show a draw-out type circuit equipped with this position indicating switch. FIG. 3 is a side cross-sectional view showing a front view of the circuit breaker and a side plate of a mounting frame with a side plate removed, and FIG. 3, FIG. 4, and FIG. 5 are “connection position”, “test position”, and “disconnection”, respectively. It is a figure which shows the principal part of this position display switch in a "position."

The drawer type circuit breaker to which the position indicating switch device is attached is composed of a mounting frame 1 and a circuit breaker body 2.
A terminal 3 for connecting an external electric wire of the main circuit is attached to the attachment frame 1. The circuit breaker main body 2 includes a first contactor 4 operated by an opening / closing mechanism (not shown) and a second contactor 5 that comes into contact with and separates from the first contactor 4, and extends in the left-right direction in FIG. 2 along a rail (not shown) provided on the mounting frame 1. The second contact 5 comes into contact with and separates from the terminal 3 of the mounting frame 1 by this movement. The second contact 5 is biased by a spring toward the first contact 4 at one end and the terminal 3 at the other end.

Further, control circuit disconnecting devices 6 and 7 for connecting an electric control device having a built-in opening / closing mechanism of the circuit breaker body 2 to an external circuit are provided in the mounting frame 1 and the circuit breaker body 2 as a pair, respectively. . Although not shown in detail, the control circuit disconnecting devices 6 and 7 are configured by sliding contacts, and are in contact when the circuit breaker body 2 is between the “connection position” and the “test position”, and the “test It is disconnected during the movement from "position" to "disconnection position".

The position indicating switch device provided in this drawer type circuit breaker has a fixed shaft 8 provided outside the side plate of the circuit breaker main body 2 and a side plate of the mounting frame 1 engageable with the fixed shaft 8. Is rotatably supported inside the guide and has a guide groove 9 at the tip.
a first lever 9 having a formed therein, a guide pin 10 engageable with the guide groove 9a at one end, and a second lever 11 rotatably supported inside the side plate of the mounting frame 1; Switch unit 12 mounted on the upper part of the first switch 1, and a third lever 1 pivotally supported by the switch unit 12
3, a link member 14 connecting the second lever 11 and the third lever 13, and a coil spring 15 stretched between the second lever 11 and the mounting frame 1 to bias the second lever 11 clockwise. Is equipped with.

The switch unit 12 has a "connection position",
Cams 17, 18 and 1 having partial units 12a, 12b and 12c corresponding to the "test position" and the "disconnection position", and rotating together with the rotating shaft 16 of the third lever 13, respectively.
9 and microswitches 20, 21, 22. The micro switches 20, 21, 22 are provided with actuators 20 a, 21 a, 22 a, respectively, and the cam 1
Protrusions 17a, 18 formed on 7, 18, 19 respectively
When a, 19a engages with the actuators 20a, 21a, 22a, the respective microswitches are activated.
In this embodiment, when viewed from the axial direction of the rotating shaft 16, the space between the protrusion 17a and the protrusion 18a and between the protrusion 18a and the protrusion 19a.
And 45 ° are formed between them.

The operation of pulling out the above-mentioned drawer type circuit breaker from the "connection position" will be described with reference to FIGS. 2, 3, 4 and 5. In addition, (a) of each figure shows the whole position display switch device, and (b) shows partial units 12a, 12b, 1 of the switch unit 12, respectively.
It is a figure which shows the inside of 2c.

When the circuit breaker main body 2 in FIG. 2 is in the "connecting position", the terminal 3 and the second contactor 5 contact each other, and the sliding contactors of the control circuit disconnecting device 6 and the control circuit disconnecting device 7 contact each other. This shows a general use state in which the electric circuit can be opened and closed by electrically operating the circuit breaker body 2. In the position display switch device at the "connecting position", the second lever 11 is biased clockwise by the action of the coil spring 15 in FIG. 3, and the guide pin 10 causes the left edge of the guide groove 9a of the first lever 9 to move. Is pressed to bias the first lever 9 in the counterclockwise direction so that the left edge of the first lever 9 is the main body 2 of the circuit breaker.
The stationary shaft 8 is pressed to stand still. At this time, cam 1
The protrusion 17a of No. 7 is engaged with the actuator 20a, and the microswitch 20 is in an operating state.

From this state, the breaker body 2 is moved to the "test position".
Direction, that is, to the left, the first lever 9 is moved by the action of the coil spring 15 following the movement of the fixed shaft 8.
Rotates counterclockwise, and the guide groove 9a of the first lever 9
The guide pin 10 rotates clockwise with the second lever 11 along the edge of the third lever 1 via the link member 14 following the clockwise rotation of the second lever 11.
3 rotates clockwise, and the protrusion 17a and the actuator 2
The engagement of 0a is released, and the microswitch 20 becomes inoperative. Further, when the circuit breaker main body 2 is moved to the left, the first lever 9 rotates counterclockwise and the second lever 11 and the third lever 13 rotate clockwise, and the circuit breaker is rotated. Immediately before the main body 2 reaches the "test position", the engagement between the protrusion 18a of the cam 18 and the actuator 21a starts, and when the circuit breaker main body 2 reaches the "test position", the micro switch 21 is in the operating state. Becomes When the circuit breaker main body 2 is in this "test position", although not shown, the terminal 3 and the second contact 5 are separated, and the sliding contacts of the control circuit disconnecting device 6 and the control circuit disconnecting device 7 come into contact with each other. In this state, the circuit breaker body 2 can be electrically operated, but the main circuit is always open.

When the circuit breaker main body 2 is moved from this "test position" in the "disconnection position" direction, that is, to the left, the same operation as when moving from the "connection position" to the "test position" is performed, and the circuit breaker main body is moved. When 2 is the "disconnection position", the engagement between the protrusion 18a of the cam 18 and the actuator 21a is released and the micro switch 21 is in an inoperative state, and the protrusion 19a of the cam 19 and the actuator 22a are engaged with each other. The switch 22 is in an operating state.
At this “disconnection position”, although not shown, the terminal 3 and the second
Contact 5 and control circuit disconnecting device 6 and control circuit disconnecting device 7
Both of the sliding contacts are open, and the breaker body 2 is completely electrically disconnected.

When inserting the circuit breaker body 2 from the "disconnection position" to the "test position" and from the "test position" to the "connection position",
By rotating the first lever 9 in the clockwise direction against the acting force of the link member 14 by the fixed shaft 8, the operation reverse to the case of the above-described pull-out operation is performed, and the micro switch 20, 21 and 22 operate to electrically indicate the position of the circuit breaker body 2.

In the rotary type switch unit 12 used in this embodiment, the larger the rotation angle of the rotary shaft 16 corresponding to the moving distance of the circuit breaker body 2 between the respective positions, the more reliable the display can be. If the turning angles between the positions are the same, the switch assembly can be simple and accurate. In this embodiment, the moving distance of the circuit breaker main body 2 is different between the “connection position” and the “test position” and between the “test position” and the “disconnection position”. The rotation angles of 16 are set equal to each other, and are set to 45 degrees, which is a sufficient rotation angle for reliable display.

The setting of such a rotation angle is performed by setting the positions of the rotation shafts of the first lever 9 and the second lever 11 and the first lever 9 and the operation shaft 8 and the first lever 9 at each position. The engagement angle of the second lever 11 is changed depending on the factors such as calculation, and the preferred rotation angle can be set by a method such as drawing.

Further, in the present embodiment, the second lever 11 and the third lever 13 are connected by the link member 14, but if the space for installing the switch unit 12 is near the first lever 9, Lever 13 and link member 1
4 is omitted, and the same effect occurs even when the rotary shaft 16 of the switch unit 12 is used as the rotary shaft of the second lever 11, and the interlocking of the first lever 9 and the second lever 11 is the first.
Guide groove 9a formed in the lever 9 and the second lever 1
Although it is done by the guide pin 10 provided in 1,
On the contrary, a guide groove is formed in the second lever 11 and the first lever 9
May be provided with an engaging pin.

[0029]

The position indication switch device for the drawer type circuit breaker according to the present invention is a position indication switch device capable of performing reliable position indication without complicated adjustment.
It can be realized without increasing the width and depth of the circuit breaker. Also, since the switch portion can be arranged on the upper portion or the front portion of the mounting frame, wiring and maintenance can be easily performed.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a drawer type circuit breaker to which a position display switch device according to the present invention is attached.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a side view of the main part of the embodiment of the position indicating switch device for the drawer type circuit breaker according to the present invention at the “connection position”.

FIG. 4 is a side view of FIG. 3 in a “test position”.

FIG. 5 is a side view in the “disconnection position” of FIG.

FIG. 6 is a side cross-sectional view at the “connection position” of the drawer-type circuit breaker to which the conventional position display switch device is attached.

FIG. 7 is a side cross-sectional view at the “disconnection position” in FIG.

FIG. 8 is a diagram showing the inside of a conventional position display switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting frame 2 Circuit breaker main body 6, 7 Control circuit disconnecting device 8 Fixed shaft 9 1st lever 9a Guide groove 10 Guide pin 11 2nd lever 13 3rd lever 14 Link member 15 Coil spring 16 Rotating shaft 17, 18,19 Cam 20,21,22 Micro switch

Claims (1)

[Claims] 1. A position indicating switch device for displaying the main body position of the circuit breaker of a drawer type circuit breaker comprising a mounting frame and a circuit breaker main body that horizontally moves inside the mounting frame,
A first lever that is provided with an operating member in the circuit breaker main body and rotates following the movement of the operating member; a second lever that engages with the first lever and rotates; A switch that opens and closes according to the turning angle of the lever of the first lever is provided in the attachment frame, and the engaging means of the first lever and the second lever is a guide groove formed in one of the levers and the guide groove. A position indication switch device for a drawer type circuit breaker, characterized in that it is constituted by a guide member provided on the other lever that engages with the.