JP3523948B2 - Position display switch device of draw-out type circuit breaker - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position display switch device for electrically displaying the position of a breaker body of a draw-out type circuit breaker. 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 circuit breaker main body is housed in the mounting frame. For example, a rail and wheels are combined to form a circuit breaker main body. It can be pulled out and inserted from the mounting frame. The main body of this draw-out type circuit breaker is used for a relatively large circuit breaker because the main body of the circuit breaker can be removed or maintenance and inspection can be performed without removing the wires of the main circuit. Done. In many cases, the breaker body of the draw-out type circuit breaker has a “connection position“ test position ”and a“ disconnection position ”by moving a mounting frame. The `` connection position '' is a position where both the main circuit terminal of the mounting frame and the main circuit terminal of the circuit breaker main body and the control circuit terminal of the mounting frame and the control circuit terminal of the circuit breaker main body are connected together. This is a 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.Electrical operation of the breaker body can be performed to check the control circuit, etc., but since the main circuit terminals are not connected, power is not supplied. It is a position that cannot be done. "Disconnect position"
Is a position where neither the main circuit terminals nor the control circuit terminals are connected, and the circuit breaker main body is in a state of being electrically disconnected, so that maintenance and inspection can be performed safely 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 display switch device for electrically displaying the position of the circuit breaker main body. This is shown in FIG. FIG. 6 shows a circuit breaker main body 51 housed in a mounting frame 50, and a main circuit terminal 52 on the main body side is connected to the main circuit terminal 5 on the mounting frame side.
3 is connected to the control frame 3 via a draw-out contact 54, and although not shown, the mounting frame 50 and the control circuit terminals of the circuit breaker main body 51 are in a "connection position" where they are connected to each other. This shows a state in which the main circuit terminal 52 and the mounting frame side main circuit terminal 53 are separated from each other, and the control circuit terminal is also separated (not shown) at the “disconnected position”. Although the “test position” is located between the “connection position” and the “disconnection position”, the drawing is omitted. The position display switch device 55 is attached to the rear bottom 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 56 and an operation plate 57 inserted through guide holes 56a and 56b formed in opposing walls of the box 56.
And the projections 5 formed on the operation plate 57 housed in the box 56.
7a, the microswitches 58, 59 operating at the "connection position", "test position", and "disconnection position", respectively.
8, a coil spring 61 which is stretched between the box body 56 and the operation plate 57 and biases the operation plate 57 in a direction in which the circuit breaker main body 51 is pulled out. Engage the microswitch 60
Is operating. In this prior art, a circuit breaker body 51 is provided.
Is inserted from the “disconnection position” to the “test position”, the operation plate 57 is pushed backward at the rear of the circuit breaker main body 51, so that the actuator of the microswitch 60 and the operation plate 5
7 is released from engagement with the projection 57a, and the microswitch 6 is released.
0 is inactive, and then the actuator of the microswitch 59 is engaged with the protrusion 57a, and only the microswitch 59 is operated in the "test position". When the circuit breaker 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 projection 57a is canceled during the operation, and the micro switch 59 is in an inoperative state. 8 is engaged with the projection 57a, and at the "connection position", only the microswitch 58 is operated, and the state is indicated by the two-dot chain line in FIG. When the circuit breaker body 51 is pulled out from the "connection position" to the "test position" and from the "test position" to the "disconnection position", the operating plate 57 is moved in the pulling-out direction by the action force of the coil spring 61. The micro switch 59 and the micro switch 60 are sequentially operated in a state opposite to the insertion. In this conventional position indicating switch device for a drawer-type circuit breaker, the coil spring 61 acts to bias one side (rear side) of the operation plate 57 downward. In addition, when the circuit breaker body 51 pushes the operation plate 57, the operation plate 57 is not necessarily pushed horizontally.
The operation plate 57 may move diagonally by the amount of play between the guide holes 56a and 56b and the operation plate 57. Operating plate 5
Since the operation timing of the microswitch is different between the case where 7 moves horizontally and the case where it moves obliquely, it is necessary to accurately assemble and adjust so that the operation plate 57 operates normally no matter how the operation plate 57 moves. Did not. Also,
This problem can be solved by using a structure that restricts the above play to a very small extent. However, when the circuit breaker main body 51 is pulled out, the operation force of the coil spring 61 is reduced by the frictional force between the guide holes 56a and 56b and the operation plate 57. There is a possibility that the plate 57 does not move in the pull-out direction, and it is difficult to adopt the plate 57. Further, providing the unitized conventional position indicating switch device in the side space between the circuit breaker main body 51 and the mounting frame 50 results in an excessively large overall width when viewed from the front. As shown in FIGS. 6 and 7, it must be attached to the rear part of the attachment frame 50. However, if an appropriate mounting space is formed without difficulty at the rear of the mounting frame 50 as shown in these drawings, the drawer contact 54 is omitted, and the main frame side main circuit terminal 52 and the mounting frame side main circuit terminal 52 are omitted. 5
The drawer-type circuit breaker proposed by the applicant of the present invention in Japanese Patent Application No. 5-24222, which was designed so that the parts corresponding to 3 directly contact each other, does not have such a suitable space. There was a problem that the position display switch device could not be attached. Further, since this conventional device is mounted on the rear bottom of the mounting frame 50, there is also a problem that wiring and maintenance are difficult. Accordingly, it is a primary object of the present invention to provide a drawer-type circuit breaker position indicating switch device which can be easily and reliably mounted, wired, and maintained, and does not require a large external shape of the circuit breaker. is there. [0013] The above-mentioned problems are solved.
Therefore, the present invention provides a mounting frame and a connection position inside the mounting frame.
And a position display switch device for displaying a main body position of a breaker of a draw-out type circuit breaker comprising a circuit breaker body horizontally moving between a test position and a disconnection position , comprising an operating member on the circuit breaker body, A first member that rotates following the movement of the operating member;
A mounting lever, a second lever that rotates by engaging with the first lever, and a switch that opens and closes according to the rotation angle of the second lever. The lever engaging means is constituted by a guide groove formed on one of the levers and a guide member provided on the other lever engaged with the guide groove .
For each connection position, test position and disconnection position
Operate the provided switches and each switch
Having projections provided on a common rotation axis
A rotating shaft lever attached to the rotating shaft, and a rotating shaft lever.
Having a link member connecting the bar and the second lever
And In the position indicating switch device for the draw-out type circuit breaker according to the present invention, the linear movement of the circuit breaker main body is converted into the rotational movement 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 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. Connection position of the breaker body, test
A switch corresponding to each of the test position and the disconnection position,
Each switch operates on a common rotation axis
A cam having a projection provided on a rotating shaft.
A pivot shaft lever is provided, and the pivot shaft lever and the second lever are provided.
By connecting the bar with the link member, a switch that operates at the rotation angle of the second lever corresponding to each position of the breaker main body can electrically indicate the position of the breaker main body. [0015] With such a structure, harmful friction that restricts the operation of the first lever and the second lever is not generated, and smooth operation is possible. Further, the engagement angle between the operating member of the circuit breaker body and the first lever or the first angle
By changing the angle of engagement between the second lever and the second lever,
Since the rotation angle of the lever can be changed freely,
The rotation angle of the second lever, that is, the operation timing of the switch, can be automatically set in accordance with a predetermined moving distance of the breaker body. The first and second levers is capable of placement in a small gap of the breaker body and a mounting frame for it a plate-like member, the switch portion of the thickness a
1st lever, 2nd lever, link member and rotation axis lever
By appropriately forming and connecting the holes, it is possible to freely arrange them at appropriate places. 1 to 6 show an embodiment of a position indicating switch device of a drawer-type circuit breaker according to the present invention. FIGS. 1 and 2 show the position indicating switch attached thereto. FIG. 3, FIG. 4, and FIG. 5 are a "connection position" and a "test position", respectively, showing a front view of the draw-out type circuit breaker and a side sectional view showing a part of the inside of the breaker body by removing a side plate of the mounting frame. FIG. 4 is a diagram showing a main part of the position display switch at a "disconnect position". The drawer-type circuit breaker to which the position indicating switch device is mounted comprises a mounting frame 1 and a breaker main body 2,
A terminal 3 for connecting an external electric wire of the main circuit is mounted on the mounting frame 1. The circuit breaker main body 2 includes a second contact 5 that comes into contact with and separates from the first contact 4 that is operated by an opening / closing mechanism (not shown), and a left-right direction in FIG. 2 along a rail (not shown) provided on the mounting frame 1. The second contact 5 contacts 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 toward the terminal 3 at the other end. Furthermore, control circuit disconnecting devices 6 and 7 for connecting an external circuit to an electric control device or the like having a built-in opening / closing mechanism of the circuit breaker body 2 are provided as a pair in the mounting frame 1 and the circuit breaker body 2, respectively. . Although not shown in detail, the control circuit disconnecting devices 6 and 7 are constituted by sliding contacts, and are in contact with each other when the breaker body 2 is between the "connection position" and the "test position". The disconnection occurs during the movement from the “position” to the “disconnection position”. The position indicating switch device provided in this draw-out type circuit breaker has a fixed shaft 8 provided outside the side plate of the circuit breaker main body 2, and is capable of engaging with the fixed shaft 8 and is provided with a side plate of the mounting frame 1. The guide groove 9 is rotatably supported inside the
a second lever 11 having a guide pin 10 at one end, which is engageable with the guide groove 9a, the second lever 11 being rotatably supported inside the side plate of the mounting frame 1; 1, a switch unit 12 mounted on the upper part of the first lever 1, and a third lever 1 rotatably 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. It has. 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", respectively, and rotating together with the rotation shaft 16 of the third lever 13.
9 and microswitches 20, 21, 22. The microswitches 20, 21, and 22 include actuators 20a, 21a, and 22a, respectively, and
Projections 17a, 18 formed on 7, 18, 19 respectively
Each of the microswitches operates when a, 19a is engaged with an actuator 20a, 21a, 22a.
In this embodiment, when viewed from the axial direction of the rotation shaft 16, between the projections 17a and 18a and between the projections 18a and 19a.
Are arranged so that an angle of 45 degrees is generated between them. The operation of pulling out the drawer-type circuit breaker from the "connection position" will be described with reference to FIGS. 2, 3, 4 and 5. (A) of each figure shows the entirety of the position indicating switch device, and (b) shows partial units 12a, 12b, 1
It is a figure which shows the inside of 2c. When the circuit breaker body 2 shown in FIG. 2 is at the "connection position", the terminal 3 and the second contact 5 come into contact, and the sliding contacts of the control circuit disconnecting device 6 and the control circuit disconnecting device 7 come into contact. This indicates a general use state in which an electric circuit can be opened and closed by electrically operating the circuit breaker main body 2. In the position indicating switch device at the "connection position", in FIG. 3, the second lever 11 is biased clockwise by the action of the coil spring 15, and the guide pin 10 is moved to the left edge of the guide groove 9a of the first lever 9. , The first lever 9 is deflected counterclockwise, and the left edge of the first lever 9 is
The stationary shaft 8 is pressed to stand still. At this time, cam 1
7, the projection 17a is engaged with the actuator 20a, and the micro switch 20 is operated. In this state, the breaker body 2 is moved to the "test position".
When the lever is moved in the left or right direction, the first lever 9 is moved by the action of the coil spring 15 following the movement of the fixed shaft 8.
Is rotated counterclockwise, and the guide groove 9a of the first lever 9 is rotated.
The guide pin 10 pivots clockwise along 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 Oa is released, and the microswitch 20 enters a non-operating state. Further, when the circuit breaker main body 2 is moved to the left, the rotation of the first lever 9 in the counterclockwise direction and the rotation of the second lever 11 and the third lever 13 in the clockwise direction advance, and Immediately before the main body 2 reaches the "test position", the engagement between the projection 18a of the cam 18 and the actuator 21a starts, and when the circuit breaker main body 2 reaches the "test position", the microswitch 21 is in the operating state. It becomes. When the circuit breaker main body 2 is at the “test position”, the terminal 3 and the second contact 5 are opened, not shown, but 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 main body 2 can be electrically operated, but the main circuit is always open. When the circuit breaker main body 2 is moved from the "test position" in the "disconnection position" direction, that is, leftward, the same operation as when the circuit breaker main body 2 is moved from the "connection position" to the "test position" is performed. When the switch 2 is in the "disconnect position", the engagement between the projection 18a of the cam 18 and the actuator 21a is released, and the microswitch 21 is in a non-operating state. The switch 22 is operating.
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
Are open, and the circuit breaker body 2 is completely electrically disconnected. When inserting the breaker body 2 from the "disconnection position" to the "test position" and from the "test position" to the "connection position,
When the fixed shaft 8 rotates the first lever 9 in the clockwise direction against the acting force of the link member 14, the operation reverse to the case of the above-described pull-out operation is performed. 21 and 22 operate to electrically display the position of the breaker body 2. The rotation type switch unit 12 used in this embodiment can display more reliably as the rotation angle of the rotation shaft 16 corresponding to the moving distance of the breaker main body 2 between the respective positions becomes larger. When the rotation angle between the positions is equal, the assembly of the switch is simple and can be made without error. In the present 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 a sufficient rotation angle of 45 degrees to ensure display. The setting of such a rotation angle depends on the positions of the rotation axes of the first lever 9 and the second lever 11 and the first lever 9, the operating shaft 8 and the first lever 9 at each position. The preferable rotation angle can be set by a method such as calculation or drawing by changing the engagement angle of the second lever 11 or the like. Further, in this embodiment, the second lever 11 and the third lever 13 are connected by the link member 14. However, if the space for installing the switch unit 12 is near the first lever 9, 3 lever 13 and link member 1
4 is omitted, and the same operation occurs even when the rotation shaft 16 of the switch unit 12 is used as the rotation shaft of the second lever 11. Further, the interlock between the first lever 9 and the second lever 11
Guide groove 9a formed in the lever 9 and the second lever 1
Although it is performed by the guide pin 10 provided in 1,
Conversely, a guide groove is formed in the second lever 11 and the first lever 9
May be provided with an engagement pin. The position display switch device of the drawer-type circuit breaker according to the present invention is a position display switch device capable of displaying a reliable position without complicated adjustment.
This can be realized without increasing the width and depth of the circuit breaker. Further, since the switch part can be arranged at the upper part or the front part 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 indicating switch device according to the present invention is attached. FIG. 2 is a side sectional view of FIG. FIG. 3 is a side view at a “connection position” of a main part of one embodiment of the position indicating switch device of the drawer-type circuit breaker according to the present invention. FIG. 4 is a side view at a “test position” in FIG. 3; FIG. 5 is a side view at a “disconnection position” in FIG. 3; FIG. 6 is a side sectional view at a “connection position” of a drawer-type circuit breaker to which a conventional position indicating switch device is attached. FIG. 7 is a side sectional view at a “disconnection position” in FIG. 6; FIG. 8 is a diagram showing the inside of a conventional position display switch. [Description of Signs] 1 Mounting frame 2 Circuit breaker main body 6, 7 Control circuit disconnecting device 8 Fixed shaft 9 First lever 9a Guide groove 10 Guide pin 11 Second lever 13 Third lever 14 Link member 15 Coil spring 16 Rotating shafts 17, 18, 19 Cam 20, 21, 22 Micro switch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 61-84611 (JP, U) Japanese Utility Model Sho 63-198319 (JP, U) Japanese Utility Model Sho 57-74610 (JP, U) Japanese Utility Model Hei 2 44809 (JP, U) Fully open 1987-140814 (JP, U) Fully open 1987-152611 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02B 11/00-11 / 28

Claims (1)

(57) [Claim 1] A mounting frame, a connection position inside the mounting frame , a test position and a disconnection position
A position display switch device for displaying a main body position of the circuit breaker of a drawer-type circuit breaker including a circuit breaker main body that horizontally moves between , wherein an operation member is provided on the circuit breaker main body, and the operation member is moved. A first lever that rotates following the first lever, a second lever that rotates by engaging with the first lever, and a switch that opens and closes according to a rotation angle of the second lever. The first lever and the second lever are provided on a frame, and the engagement means of the first lever and the second lever is constituted by a guide groove formed on one of the levers and a guide member provided on the other lever engaging with the guide groove.
Of the connection position, test position and disconnection position of the breaker body
Said switch provided for each of said switches;
The switches are set on a common rotation axis to operate the switches.
A cam having a projected projection, and a cam attached to the rotation shaft.
A rotating shaft lever, the rotating shaft lever and the second lever.
A position indicating switch device for a drawer-type circuit breaker, characterized by having a link member for connecting to a circuit breaker.