JP3034136B2 - Circuit breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker and, more particularly, to an accessory for the circuit breaker.

[0002]

2. Description of the Related Art FIGS.
FIG. 24 is a diagram showing a conventional circuit breaker disclosed in Japanese Patent No. 9853, FIG. 24 is a sectional view of a main part showing an ON state of the circuit breaker, and FIG.
5 is a sectional view of a main part showing a trip state of the circuit breaker, FIG. 26 is a diagram showing the accessory device of FIG. 24, FIG. 27 is a diagram of FIG. 26 viewed from the right, and FIG. 28 is an exploded perspective view of FIG. is there.

In FIGS. 24 and 25, reference numeral 1 denotes a circuit breaker case, 2 a fixed conductor having a fixed contact 2a, and 3 a movable contact 3.
A movable element 4 having a (a), a crossbar 4, a latch 5 that moves from the position shown in FIG. 24 to the position shown in FIG.

The attachment device 6 will be described with reference to FIGS. In the drawing, reference numeral 7 denotes a mounting base which is mounted by inserting the mounting foot 7a into the side groove 8 of the circuit breaker case 1, 9 denotes an alarm switch for displaying a trip operation of the circuit breaker, and 10 denotes an actuator of the alarm switch 9. Transmission unit 10a
Engages with the latch 5. Reference numeral 11 denotes an auxiliary switch for indicating that the circuit breaker is turned on, and reference numeral 12 denotes an actuator of the auxiliary switch 11, which is engaged with the crossbar 4. Reference numerals 13 and 14 are covers for holding the switches 9 and 11 between the mounting base 7 and the switches 9 and 11.

As shown in FIG. 24, when the circuit breaker is on, the transmission portion 10a of the actuator 10 is engaged with the latch 5 and the alarm switch 9 is opened and no alarm is issued. 12 is spring 1
The auxiliary switch 11 is closed by being energized by the switch 2a to notify the closing (ON state) of the circuit breaker.

As shown in FIG. 25, when the circuit breaker trips, the latch 5 moves and the transmitting portion 10a of the actuator 10 is released from the latch 5, whereby the actuator 10 is urged by the spring 10b and the alarm switch 9 is activated. Is closed, and an alarm is issued. However, the actuator 12 which comes into contact with the cross bar 4 and is operated against the spring 12a is separated from the auxiliary switch 11 and the auxiliary switch 11 is turned off.

Although not shown, when the circuit breaker is off, as shown in FIG. 25, the actuator 12 is actuated by the crossbar 4 to turn off the auxiliary switch 11, and the latch 5 does not move. Similarly, the alarm switch 9 is turned off by engaging with the transmission portion 10a of the actuator 10.

[0008]

As described above, the conventional circuit breaker has the actuator 10 of the switch 9 of the attached device.
Is engaged with the latch 5 on the main body side, so that when the accessory device 6 is incorporated into the circuit breaker case 1, the actuator 10
Must be assembled so as to engage with the latch 5, the latch 5 hinders the assembling at the time of assembly, and the endless latch 5 is operated unnecessarily to cause the mistrip. The actuator 10 of the switch 9 is closed.
Since the loss bar 4 is urged in the direction to close the contact,
The circuit breaker operates due to abnormal current, etc., and opens the contacts
When the urging force of the actuator 10 is
Hinders rotation and reduces the separation distance of the contacts, resulting in a decrease in breaking performance
There was a problem that invited.

[0009] The present invention has been made to solve such a problem, by placing the actuator of the accessory device over the crossbar, and easily can be incorporated as from above, also breaker abnormal current such as Included when shutting off by
The urging force of the actuator of the device does not prevent
An object of the present invention is to obtain a circuit breaker that does not cause a decrease in disconnection performance .

[0010]

SUMMARY OF THE INVENTION A circuit breaker according to the present invention is designed to directly operate an actuator with a crossbar.
To engage with the operation projection provided on the crossbar.
Change the bias direction of the black switch actuator to open the circuit breaker.
Off and trip positions of the crossbar in the same direction as
When the actuator biasing force is applied to the
It does not hinder the rotation of.

[0011]

[Action] In the invention of this, to the circuit breaker of the abnormal current, etc.
When the shut-off operation is performed, the biasing force of the attached actuator is
Does not hinder the rotation of the crossbar, reducing the distance between contacts
I will not reduce it.

[0012]

【Example】

Embodiment 1 FIG. One embodiment of the present invention will be described with reference to FIGS. 1 is an exploded perspective view, FIG. 2 is a side view showing the attachment device of FIG. 1, FIG. 3 is a top view of FIG. 2, FIG. 4 is an exploded perspective view of FIG. 2, and FIG. , FIG. 6 is a diagram of a circuit breaker off state showing an auxiliary switch, FIG. 7 is a diagram of a circuit breaker off state showing an alarm switch, and FIG. 8 is a diagram of a circuit breaker trip state showing an alarm switch. The same or corresponding parts are denoted by the same reference numerals and description thereof will be omitted.

In FIG. 1, 1A is a circuit breaker case including a base 1a and a main cover 1b detachably fixed to the base 1a, and 15 is formed on a surface 151 of the main cover 1b opposite to the base 1a. Recesses 17 for accommodating the accessory device 16 are auxiliary covers for closing the recess 15 and are detachably attached to the main cover 1b. Reference numeral 18 denotes an actuator insertion hole formed in the bottom surface of the recess 15, reference numeral 19 denotes an operation handle, reference numeral 20 denotes a mounting base of the attachment device 16, reference numeral 21 denotes a mounting frame which is juxtaposed on both sides of the mounting base 20 to form a switch storage space 22, Reference numeral 23 denotes a protrusion provided on the upper inner surface of the mounting frame 21, and reference numeral 24 denotes an alarm switch composed of a micro switch, which has two upper and lower mounting holes 24a. Reference numeral 25 denotes an auxiliary switch composed of a microswitch, which has two upper and lower mounting holes 25a. Reference numeral 26 denotes a support shaft for holding the actuator protruding from both sides of the mounting base 20, and 27 denotes an actuator of the alarm switch 24, which is inserted and held on the support shaft 26 together with a spring 28. An actuator 29 of the auxiliary switch 25 is inserted and held on the support shaft 26 together with the spring 30.

When the accessory device 16 assembled as shown in FIGS. 2 and 3 is inserted into the recess 15 from above to below in the direction of the arrow 31 as shown in FIG. 27 and 29 are circuit breaker cases 1
Each of them protrudes into A and is located above the cross bar 4.

Therefore, the auxiliary switch 25 of the auxiliary device 16
When the circuit breaker is turned on, the actuator 29 does not engage with the cross bar 4 as shown in FIG.
As shown in (2), the actuator 29 is engaged with the crossbar 4 and switched to perform on / off display. Next, when the circuit breaker is turned on (not shown) and the circuit breaker is turned off, the alarm switch 24 causes the actuator 27 not to engage with the cross bar 4 as shown in FIG. 27 is engaged with the crossbar 4 to be switched and an alarm is issued. In this way, the accessory device 16 can be easily assembled into the circuit breaker case 1A simply by assembling the accessory device 16 from the top down, so that it can be easily attached to the customer.

Embodiment 2 FIG. In the first embodiment, if the shapes of the actuator 27 of the alarm switch 24 and the actuator 29 of the auxiliary switch 25 are different, for example, as shown in FIG.
5 can be switched reliably, the mounting positions of the alarm switch 24 and the auxiliary switch 25 can be made substantially the same, and a small accessory device can be configured. The operation is shown in FIG.
As shown in FIG. 10 is shown in FIG. 5, FIG. 11 is shown in FIG.
2 corresponds to FIG. 7, and FIG. 13 corresponds to FIG.

Embodiment 3 FIG. If the actuator support shafts 26 are provided symmetrically on both surfaces of the mounting base 20 as shown in the first embodiment, two alarm switches 24 or two auxiliary switches 25 can be provided by changing the actuators 27 and 29. Combination becomes possible.

Embodiment 4 FIG. In the first embodiment, by changing the shapes of the actuators 27 and 29, different rotation directions of the crossbar 4 can be used for the alarm switch and the auxiliary switch. For example, as shown in FIGS. 14 to 23, when the actuator 29A of the auxiliary switch 25 is engaged with the operating projection 4a of the cross bar 4, when the circuit breaker is turned on, as shown in FIGS. 29A is a spring 30 and the operating projection 4 of the cross bar 4
When the circuit breaker is off, the actuator 29A is separated from the operation convex portion 4a and switched on and off, as shown in FIGS.

As shown in FIGS.
When the actuators 27 and 29 of the auxiliary switch 25 operate in the same rotation direction of the crossbar 4, the auxiliary device 16
Are mounted on the right and left sides of the circuit breaker, for example, in a trip state, a total of four actuators engage with the crossbar 4, and the rotation of the crossbar 4 is prevented by the spring force, so that the movable contact is pushed down. There is a possibility that the contact distance is reduced and the performance such as interruption is reduced. On the other hand,
In Example 4, as shown in FIGS.
The actuator 29A of the auxiliary switch 25
An operating projection 4a is provided on the attachment device side of the crossbar 4
And the actuator 29A is centered on the support shaft 26.
The circuit is cut off because it is biased by the spring 30 in the clockwise direction.
When the vessel is in the ON state (FIGS. 16 and 20), the operating projection 4a is closed.
Counteracts the actuator 29A against the urging force of the spring 30
Direction, but the circuit breaker turns off and trips.
Counterclockwise during cross operation (Figs. 17 and 21).
The rotation is in the same direction as the urging direction of the actuator 29A.
Actuator 29A switches auxiliary switch 25
When the actuator 29 stops, the operating projection 4a is
Since it is released from A and does not hinder the rotation of the crossbar,
The movable contact is pushed by the urging force of the actuator 29A.
It will not be lowered, and it will be blocked by the decrease in the distance between the contacts.
A reduction in disconnection performance is prevented.

[0020]

As described above, according to the present invention, the cross
The spring does not prevent the bar from turning off and turning to trip
Then, the movable contact is pushed down and the distance between the contacts decreases,
This has the effect of preventing the blocking performance from being reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a side view showing the attachment device of FIG. 1;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is an exploded perspective view of FIG. 2;

FIG. 5 is a diagram illustrating an auxiliary switch in a circuit breaker ON state.

FIG. 6 is a diagram showing an auxiliary switch in a circuit breaker off state.

FIG. 7 is a view of a circuit breaker off state showing an alarm switch.

FIG. 8 is a diagram of a breaker trip state showing an alarm switch.

FIG. 9 is a view of an actuator showing a second embodiment of the present invention.

FIG. 10 is a diagram corresponding to FIG. 5;

FIG. 11 is a diagram corresponding to FIG. 6;

FIG. 12 is a diagram corresponding to FIG. 7;

FIG. 13 is a diagram corresponding to FIG. 8;

FIG. 14 is a side view of an attachment device according to a fourth embodiment of the present invention.

FIG. 15 is an exploded perspective view of FIG.

FIG. 16 is a diagram showing an auxiliary switch in a circuit breaker ON state.

FIG. 17 is a diagram showing an auxiliary switch in a circuit breaker off state.

FIG. 18 is a diagram showing a circuit breaker off state showing an alarm switch.

FIG. 19 is a diagram of a circuit breaker trip state showing an alarm switch.

FIG. 20 is a diagram corresponding to FIG. 16;

FIG. 21 is a diagram corresponding to FIG. 17;

FIG. 22 is a diagram corresponding to FIG. 18;

FIG. 23 is a diagram corresponding to FIG. 19;

FIG. 24 is a cross-sectional view of a main part of a conventional device in a circuit breaker ON state.

FIG. 25 is a sectional view of a main part showing a trip state of the circuit breaker.

FIG. 26 is a diagram showing the attachment device of FIG. 24;

FIG. 27 is a view of FIG. 26 as viewed from the right.

FIG. 28 is an exploded perspective view of FIG. 26;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1A Breaker case 1a Base 1b Main cover 2 Fixed conductor 2a Fixed contact 3 Mover 3a Movable contact 4 Crossbar 15 Depression 16 Attached device 17 Auxiliary cover 18 Actuator insertion hole 20 Mounting base 24 Alarm switch 25 Auxiliary switch 27 Actuator 29 Actuator

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shiro Murata 1-8 Midoricho, Fukuyama City, Mitsubishi Electric Corporation Fukuyama Works (72) Inventor Shigeru Kaneo 1-8 Midorimachi, Fukuyama City Mitsubishi Electric Fukuyama Works ( 56) References JP-A-1-206536 (JP, A) JP-A-1-13717 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 73/12

Claims (1)

(57) [Claims] 1. An on / off device housed in a circuit breaker case.
The crossbar of the opening / closing mechanism that has different stop positions on trips,
An auxiliary device comprising an alarm switch micro switch, an auxiliary switch micro switch, and a housing portion provided above the crossbar of the circuit breaker case for housing the auxiliary device, wherein the micro switches are mounted on both sides, respectively. that the both surfaces of the mounting base to provide a shaft in contrast, an actuator for each micro switch provided on the respective axes, said Mai
A black switch actuator is directly operated by the crossbar, and an operation projection provided on the crossbar is provided.
Of the actuator for the microswitch engaged with the portion
At least one biasing direction is the same as the opening of the breaker.
To rotate the crossbar to the off and trip positions.
On the other hand, the urging force of the micro switch actuator
The circuit breaker does not hinder the rotation of the crossbar .