JP2871973B2 - 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 provided with auxiliary devices such as an alarm switch and an auxiliary switch.

[0002]

2. Description of the Related Art A conventional circuit breaker will be described with reference to FIGS. 15 is an external perspective view, FIG. 16 is an exploded perspective view of FIG. 15, FIG. 17 is a view showing an ON state in a section taken along line XVII-XVII in FIG. 15, and FIG. 18 is an OFF state in the same section as FIG. FIG. 19 is a view showing a trip state in the same cross section as FIG.

In the drawing, reference numeral 1 denotes a circuit breaker case comprising a base 1a and a main cover 1b detachably fixed to the base 1a, 2 denotes an auxiliary device such as an alarm switch and an auxiliary switch, and 3 denotes a base of the main cover 1b. A recess formed on the surface 101 opposite to 1a for accommodating the accessory 2 is attached to the main cover 1b in a detachable manner, and an auxiliary cover for closing the recess 3 is provided in the circuit breaker case 1. A movable element that performs opening and closing operations, and has a movable contact 5a. 6 is a movable contact 5a
And a stationary handle 7 that opens and closes the movable element 5 via a toggle link mechanism 8, and a rotating section 7a that rotates along the inner surface of the main cover 1b.
And a handle portion 7b protruding from the rotating portion 7a and protruding outside from the opening of the main cover 1b. Reference numeral 9 denotes a lever connected to the toggle link mechanism 8, and reference numeral 10 denotes a trip bar, which is connected to the lever 9 via a lip 11 and a latch 12. Reference numeral 13 denotes a tripping mechanism (bimetal type, electromagnetic type) connected to the load side terminal plate 14, and the flexible twisted wire 1
5 is connected to the mover 5.

Next, the operation will be described. 15 to 1
When the handle 7 is moved in the direction of arrow 16 from the on state shown in FIG.
Is pulled up and turned off as shown in FIG.
When the handle 7 is moved in the direction of arrow 17 from the off state in FIG.
Is pushed down to the ON state shown in FIG. FIG.
When an overcurrent flows in the ON state of the switch, the tripping mechanism 13
Operates to rotate the trip bar 10 in the direction of the arrow 18, and the lever 9 jumps up due to the release of the latch 11 and the latch 12, whereby the toggle link mechanism 8 is bent and the mover 5 is pulled up, as shown in FIG. 19. As a result, a trip state occurs.

[0005]

In the conventional circuit breaker, when the auxiliary cover 4 is opened as shown in FIG. 16 and the attachment device 2 is mounted in the recess 3, the circuit breaker is turned on as shown in FIG. In this case, there is a problem in that the mounting operation of the attachment device 2 involves danger because it is in a live state and an unnecessary trip operation occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and does not open the auxiliary cover when the circuit breaker is turned on, thereby increasing the safety of the attachment device mounting work and improving the reliability. The purpose is to obtain.

[0007]

In the circuit breaker according to the present invention, the auxiliary cover is not opened when the circuit breaker is turned on.

[0008]

In the present invention, since the auxiliary cover does not open when the circuit breaker is turned on, the attachment of the accessory can be performed when the circuit breaker is safely turned off and tripped.

[0009]

【Example】

Embodiment 1 FIG. One embodiment of the present invention will be described with reference to FIGS. 1 is a sectional view showing an ON state, FIG. 2 is a sectional view showing an auxiliary cover of FIG. 1, and FIG. 3 is a view of FIG. 2 viewed from below. And the description is omitted. In the drawing, reference numeral 19 denotes an auxiliary cover, which is a guide portion 1 for guiding the rotating portion 7a of the handle 7.
9a and an opening 19b which is formed therethrough to allow the handle portion 7b of the handle 7 to protrude to the outside. Reference numeral 20 denotes a concave portion formed on the inner surface of the auxiliary cover 19, and the end of the turning portion 7a of the handle 7 at the ON position is engaged with the concave portion.

When the recess 20 is provided in the auxiliary cover 19, when the handle 7 is set to the ON position, the end of the rotating portion 7a of the handle 7 engages with the recess 20 as shown in FIG. Therefore, in this circuit breaker ON state, the auxiliary cover 19 is engaged with the handle 7 and does not open.

Embodiment 2 FIG. Another embodiment of the present invention is shown in FIGS.
Referring to FIG. 4 is an exploded perspective view with the auxiliary cover removed, FIG. 5 is a cross-sectional view showing the auxiliary cover of FIG. 4, and FIG. 6 is a perspective view showing the handle of FIG. The same reference numerals are given and the description is omitted. In the figure, reference numeral 21 denotes a pin protruding from both sides of the intermediate portion of the opening 19b of the auxiliary cover 19, and reference numerals 22 denote cutouts provided on both sides of the hinge portion 7b of the handle 7 and have a width through which the pin 21 passes.

When the pin 21 is provided on the auxiliary cover 19 in this way, the pin 21 matches the notch 22 only when the handle 7 is at the trip position as shown in FIG. It can be opened only when the breaker is tripped. In the ON / OFF state of the breaker, the pin 21 engages with the edge of the rotating portion 7a of the handle 7 and the auxiliary cover 19 does not open. Since the auxiliary cover 19 is opened only when the breaker is tripped, the state of the circuit breaker becomes constant (always tripped) during the attachment of the accessory device.
Work becomes easier.

Embodiment 3 FIG. Another embodiment of the present invention will be described with reference to FIG. FIG. 7 is a cross-sectional view showing an off state.
The same or corresponding parts as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the figure, reference numeral 23 denotes an actuator mounted on the surface 101 of the main cover 1b so as to be able to advance and retreat, and is urged by a spring 24 in the locking direction. Reference numeral 25 denotes a locking portion formed on the inner surface of the auxiliary cover 19, so that the actuator 23 is locked.

When the actuator 23 is provided on the main cover 1b in this way, only when the handle 7 is at the off position as shown in FIG. As a result, the auxiliary cover 19 can be opened only when the circuit breaker is in the OFF state. In the circuit breaker ON and trip states, the actuator 23 is locked to the locking portion 25 by the spring 24 so that the auxiliary cover 19 can be opened. Does not open. Since the auxiliary cover 19 is opened only when the circuit breaker is in the off state, the state of the circuit breaker becomes constant (always off) in the attachment device attaching work, and the work becomes easy.

Embodiment 4 FIG. Another embodiment of the present invention is shown in FIGS.
Referring to FIG. 8 is a sectional view showing the ON state, FIG. 9 is a sectional view showing the auxiliary cover of FIG. 8, and FIG. 10 is a view of FIG. 9 viewed from below. The description is omitted here. In the figure, reference numeral 26 denotes an actuator rotatably mounted on the inner surface of the auxiliary cover 19, which is urged in a non-locking direction by a spring 27. Reference numeral 28 denotes a locking portion formed on the surface 101 of the main cover 1b, and the actuator 26 is locked.

When the actuator 26 is provided on the auxiliary cover 19, the handle 7 is pushed by the end of the rotating portion 7a of the handle 7 to resist the spring 27 only when the handle 7 is in the ON position as shown in FIG. Since the actuator 26 is engaged with the locking portion 28, the auxiliary cover 19 cannot be opened only when the circuit breaker is in the ON state.
The auxiliary cover 19 can be opened because it is rotated and disengaged from the locking portion 28 as shown in FIG.

Embodiment 5 FIG. FIG. 1 shows another embodiment of the present invention.
1 and FIG. FIG. 11 is a cross-sectional view showing the ON state, and FIG. 12 is a cross-sectional view showing the OFF state. The same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the figure, 29 is a mounting screw for detachably attaching the auxiliary cover 19 to the main cover 1b, and 30 is a slider that reciprocates together in the moving direction of the handle 7.
It has a shape that covers the mounting screw 29 only at the handle-on position.

When the slider 30 is provided on the handle 7 in this manner, the slider 30 covers the mounting screw 29 at the handle-on position as shown in FIG. 11, so that the auxiliary screw 19 is opened by removing the mounting screw 29. Since the slider 30 does not cover the mounting screw 29 at the handle off position as shown in FIG. 12, the mounting screw 29 can be removed to open the auxiliary cover 19. Similarly, the slider 30 can be opened even at the handle trip position. However, the auxiliary cover 19 can be opened without covering the mounting screw 29.

Embodiment 6 FIG. FIG. 1 shows another embodiment of the present invention.
3 and FIG. FIG. 13 is a cross-sectional view showing a trip state, and FIG. 14 is a perspective view of FIG. 13 with the auxiliary cover removed. The same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the figure, reference numeral 31 denotes an actuator rotatably mounted on the surface 101 of the main cover 1b, which is urged by a spring 32 in a locking direction. 33
Is a locking portion formed on the inner surface of the auxiliary cover 19, and the actuator 31 is locked.

As described above, the actuator 31 is provided on the main cover 1b.
As shown in FIG.
The actuator 31 is rotated against the locking part 33
, The auxiliary cover 19 can be opened.
When the circuit breaker is on, and when the circuit breaker is off, the rise of the mover 5 is small, so that the actuator 31 is not rotated. 19 does not open.

Since the auxiliary cover 19 is opened only when the circuit breaker is in the trip state, the state of the circuit breaker becomes constant (it is always in the trip state) in the attachment device attaching work, and the work becomes easy. Note that, depending on the circuit breaker, the mover 5 may be used.
Of it up there is a thing as during the trip time and off of the same, in this case will be the auxiliary cover 19 only at the time of on-does not open.

[0022]

As described above, according to the present invention, the auxiliary cover is not opened when the circuit breaker is turned on, so that the safety of the attachment device mounting work can be improved and the reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an ON state according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing an auxiliary cover of FIG. 1;

FIG. 3 is a view of FIG. 2 as viewed from below.

FIG. 4 is an exploded perspective view showing the second embodiment of the present invention with an auxiliary cover removed.

FIG. 5 is a sectional view showing the auxiliary cover of FIG. 4;

FIG. 6 is a perspective view showing the handle of FIG. 4;

FIG. 7 is a sectional view illustrating an off state according to a third embodiment of the present invention.

FIG. 8 is a sectional view illustrating an ON state according to a fourth embodiment of the present invention.

FIG. 9 is a sectional view showing the auxiliary cover of FIG. 8;

FIG. 10 is a view of FIG. 9 as viewed from below.

FIG. 11 is a sectional view illustrating an ON state according to a fifth embodiment of the present invention.

FIG. 12 is a sectional view showing an off state.

FIG. 13 is a sectional view illustrating a top state according to a sixth embodiment of the present invention.

FIG. 14 is a perspective view of FIG. 13 with an auxiliary cover removed.

FIG. 15 is an external perspective view showing a conventional apparatus.

FIG. 16 is an exploded perspective view of FIG. 15;

17 is a diagram showing an ON state in a cross section taken along line XVII-XVII in FIG. 15;

FIG. 18 is a view showing the off state in the same cross section as FIG. 17;

FIG. 19 is a diagram showing a trip state in the same cross section as FIG. 17;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Breaker case 1a Base 1b Main cover 101 Surface of main cover opposite to base 2 Auxiliary device 3 Recess 7 Handle 19 Auxiliary cover 20 Depression 21 Pin 22 Notch 23 Actuator 26 Actuator 31 Actuator 24 Spring 27 Spring 32 Spring 25 Locking part 28 Locking part 33 Locking part 29 Mounting screw 30 Slider

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinji Yamagata 1-8 Midoricho, Fukuyama City Mitsubishi Electric Corporation Fukuyama Works (72) Inventor Shinsaku Yamaguchi 1-8 Midoricho Fukuyama City Mitsubishi Electric Fukuyama Works (72) Inventor Tsukasa Iio 1-8 Midoricho, Fukuyama-shi Mitsubishi Electric Corporation Fukuyama Works (72) Inventor Yoshiaki Kobayashi 1-8 Midoricho Fukuyama-shi Mitsubishi Electric Corporation Fukuyama Works (72) Inventor Setsuo Hosokai Fukuyama 1-8, Midoricho, Ichiba Mitsubishi Electric Corporation Fukuyama Works (72) Inventor Hirohei Fujiwara 1-8 Midoricho, Fukuyama City Inside Mitsubishi Electric Corporation Fukuyama Works (72) Inventor Shiro Murata 1-8 Midoricho, Fukuyama City Mitsubishi (56) References JP-A-2-230629 (JP, A) U.S. Patent No. 58-8888 (JP, U) US Patent 4074091 US, A) (58) investigated the field (Int.Cl. ^6, DB name) H01H 71/00 - 83/22 H01H 9/22

Claims (6)

(57) [Claims] 1. A base and a main cover fixed to the base.
Circuit breaker case
Formed on the surface of the main cover opposite to the base.
A recess for accommodating an accessory of the blocking mechanism; and
It can only be approached and removed from the cover in the vertical direction, and the main cover is
An auxiliary cover is provided on the bar to close the recess.
Circuit breaker, wherein the breaking mechanism has a stator having fixed contacts and a movable contact.
Mover, toggle link mechanism connected to the mover,
Flip handle to activate the glue link mechanism, the toggle
A lever that supports the other end of the link mechanism.
To trip the toggle link mechanism
The bar and the trip bar are rotated when an overcurrent flows.
End of the turning part of the flip-up handle in the circuit breaker with a tripping mechanism
The auxiliary cover is provided with a recess that engages with
Move the handle from the circuit breaker on state to the circuit breaker off state.
To move the tip of the rotating part into engagement with the recess.
A circuit breaker characterized by being detached from the circuit breaker. 2. A base and a main cover fixed to the base.
Circuit breaker case
Formed on the surface of the main cover opposite to the base.
A recess for accommodating an accessory of the blocking mechanism; and
It can only be approached and removed from the cover in the vertical direction, and the main cover is
An auxiliary cover is provided on the bar to close the recess.
Circuit breaker, wherein the breaking mechanism has a stator having fixed contacts and a movable contact.
Mover, toggle link mechanism connected to the mover,
Flip handle to activate the glue link mechanism, the toggle
A lever that supports the other end of the link mechanism.
To trip the toggle link mechanism
The bar and the trip bar are rotated when an overcurrent flows.
In the case of a circuit breaker with a trip mechanism , a pin is cut between the rotating part of the
With the notch provided, the breaker trip state
The notch is aligned with the notch at the position and the pin is
The auxiliary cover can be opened by passing through the notch
A circuit breaker characterized by the above. 3. A base and a main cover fixed to the base.
Circuit breaker case
Formed on the surface of the main cover opposite to the base.
A recess for accommodating an accessory of the blocking mechanism; and
It can only be approached and removed from the cover in the vertical direction, and the main cover is
An auxiliary cover is provided on the bar to close the recess.
Circuit breaker, wherein the breaking mechanism has a stator having fixed contacts and a movable contact.
Mover, toggle link mechanism connected to the mover,
Flip handle to activate the glue link mechanism, the toggle
A lever that supports the other end of the link mechanism.
To trip the toggle link mechanism
The bar and the trip bar are rotated when an overcurrent flows.
In the circuit breaker having a trip mechanism , a locking portion is provided between the auxiliary cover and the main cover.
To maintain the auxiliary cover and the main cover integrally.
With an actuator, which is usually
A spring is attached to keep this engaged with the locking part.
And the upright handle is in the circuit breaker off state.
When the rotating part of the tilting handle comes into contact with the actuator,
Locking the actuator against the force of the spring
Characterized by being detached from the part
Road circuit breaker. 4. A base and a main cover fixed to the base.
Circuit breaker case
Formed on the surface of the main cover opposite to the base.
A recess for accommodating an accessory of the blocking mechanism; and
It can only be approached and removed from the cover in the vertical direction, and the main cover is
An auxiliary cover is provided on the bar to close the recess.
Circuit breaker, wherein the breaking mechanism has a stator having fixed contacts and a movable contact.
Mover, toggle link mechanism connected to the mover,
Flip handle to activate the glue link mechanism, the toggle
A lever that supports the other end of the link mechanism.
To trip the toggle link mechanism
The bar and the trip bar are rotated when an overcurrent flows.
In the circuit breaker having a trip mechanism , a locking portion is provided between the auxiliary cover and the main cover.
To maintain the auxiliary cover and the main cover integrally.
With an actuator, which is usually
A spring is attached to keep this from the locking part
Cage, wherein raisably handlebar is caused by the position of the circuit breaker turned on
When the rotating part of the inverted handle contacts the actuator,
Locking the actuator against the force of the spring
Circuit interruption characterized by engaging with
Breaker. 5. A base and a main cover fixed to the base.
Circuit breaker case
Formed on the surface of the main cover opposite to the base.
A recess for accommodating an accessory of the blocking mechanism; and
It can only be approached and removed from the cover in the vertical direction, and the main cover is
An auxiliary cover is provided on the bar to close the recess.
Circuit breaker, wherein the breaking mechanism has a stator having fixed contacts and a movable contact.
Mover, toggle link mechanism connected to the mover,
Flip handle to activate the glue link mechanism, the toggle
A lever that supports the other end of the link mechanism.
To trip the toggle link mechanism
The bar and the trip bar are rotated when an overcurrent flows.
A circuit breaker comprising a tripping mechanism, wherein the flexible handle slides as the tiltable handle moves.
Provide a slider and attach the auxiliary cover to the main cover.
At least one of the plurality of screws to be
When the rider turns the circuit breaker on the
A circuit breaker characterized in that the circuit breaker is provided. 6. A base and a main cover fixed to the base.
Circuit breaker case
Formed on the surface of the main cover opposite to the base.
A recess for accommodating an accessory of the blocking mechanism; and
It can only be approached and removed from the cover in the vertical direction, and the main cover is
An auxiliary cover is provided on the bar to close the recess.
Circuit breaker, wherein the breaking mechanism has a stator having fixed contacts and a movable contact.
Mover, toggle link mechanism connected to the mover,
Flip handle to activate the glue link mechanism, the toggle
A lever that supports the other end of the link mechanism.
To trip the toggle link mechanism
The bar and the trip bar are rotated when an overcurrent flows.
In the circuit breaker having a trip mechanism , a locking portion is provided between the auxiliary cover and the main cover.
To maintain the auxiliary cover and the main cover integrally.
An actuator is provided, and the actuator is usually provided with
A spring is attached to keep this engaged with the locking part.
When the breaker trips, the mover
Actuator against the force of the spring
That the lock is released from the lock.
Features a circuit breaker.