JP2807104B2 - Contact 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 contact breaker used for remote control of a load, such as emergency lighting, which requires constant charging of a storage battery.

[0002]

2. Description of the Related Art Emergency lighting is a load that requires constant charging of a storage battery. The emergency lighting always charges the storage battery and lights up in an emergency. Some emergency lights of this type can be controlled to be turned on by remote control.

[0003]

By the way, in order to remotely control this type of load, a path for supplying power to the load for constant charging and a path for supplying power for controlling the operation of the load are required. Is required. The present invention has been made in view of the above points, and an object of the present invention is to provide a contact breaker that can remotely control a load that needs to constantly charge a storage battery such as an emergency light. It is in.

[0004]

According to the present invention, in order to attain the above object, there is provided an interruption mechanism unit for interrupting an electric circuit in conjunction with operation of a steering wheel or operation of an abnormal current detection unit. A first load terminal to which a pole is provided with a breaking mechanism and a remote opening / closing mechanism for closing and breaking an electric circuit in response to a remote control signal, a first load terminal to which a load is connected via the breaking mechanism, a breaking mechanism and a remote switching mechanism And a second load terminal to which a load is connected via both parts. The breaking mechanism of each of the poles is interlocked, and the contact of the remote opening / closing mechanism is a normally-excited b-contact.

[0005]

The present invention has the above-described structure,
A path through the cutoff mechanism of each pole can be used as an electric path for constantly charging a storage battery provided with a load,
In addition, as a path for remotely controlling the operation of the load, a path through the remote opening / closing mechanism of one pole and the other pole can be remotely controlled for a load such as an emergency light which needs to constantly charge a storage battery. It is like that.

[0006]

1 and 7 show an embodiment of the present invention. As shown in FIG. 1A, the contact breaker according to the present embodiment is formed by integrally connecting three housings 10 each having substantially the same shape.
As shown in FIG. 3, a remote opening / closing mechanism B for housing an interrupting mechanism A for interrupting an electric circuit and opening and closing the electric circuit in another housing 10 in response to a remote control signal.
There is a structure containing.

[0007] First, a contact breaker having a basic structure used for forming the contact breaker will be described. Note that this contact breaker
One housing 10 of the contact breaker of the present embodiment
And a blocking mechanism A and a remote opening / closing mechanism B. In this contact breaker, a power supply terminal 25 for connecting a power supply line, a load terminal 9 for connecting a load line, and a remote input terminal 26 for connecting a signal line for inputting a remote control signal are arranged at both ends of a housing 10, respectively. is there. Note that each terminal 26 is a screw terminal.

As shown in FIG. 7, a handle 1 protrudes from the upper surface of the housing 10. When the handle 1 is turned in a solid line state in FIG. The movable contact 3 to which is fixed is rotated counterclockwise. When the handle 1 is rotated clockwise, the movable contact 3 is rotated clockwise. The contact breaker includes a bimetal 21 for detecting an overcurrent.
The abnormal current detection unit 2 is composed of an overcurrent detection unit that uses an electromagnet device 22 that detects a short-circuit current, and an overcurrent detection unit that uses an electromagnet device 22 that detects a short-circuit current.

The bimetal 21 is deformed toward the breaking mechanism A when an excessive load current flows, and presses the upper part of the latch link 13 of the breaking mechanism A, so that the breaking mechanism A
Is tripped. When a short-circuit load current flows through the coil 11, the electromagnet device 22 pulls the output shaft 12 to the left in FIG. 7, and forcibly moves the movable contact 3 counterclockwise at the tip of the output shaft 12. And the lower end of the latch link 13 of the shutoff mechanism A is pushed leftward in the figure by the base end of the output shaft 12 (not shown) to trip the shutoff mechanism A.

The breaking mechanism A is not shown in detail, but when the latch link 13 is rotated clockwise by the bimetal 21 or the electromagnet device 22 as described above, the latch link 13 is tripped by the latch piece. The latched state with the link is released, and the trip link and the connecting link 16 connecting the trip link and the movable contact 3 by the return force of the opening spring (not shown).
Is driven, and the cutoff mechanism A trips. At this time, the movable contact 3 rotates clockwise as shown by the broken line in FIG.

When the shut-off mechanism A trips as described above, the handle 1 is returned clockwise by a return spring (not shown). However, the rotation of the handle 1 by the return spring at this time is such that the handle 1 is in the neutral state (FIG. 7).
It is structured to stop when standing upright inside.
When the handle 1 in the neutral state is pivoted to fully tilt clockwise, the shut-off mechanism A is reset. When the handle 1 is pivoted to fully tilt counterclockwise, the shut-off mechanism A is turned off. Part A is set.

Next, the remote opening / closing mechanism B is provided with an electromagnet device 6 that performs bistable operation according to a remote control signal.
And a remote contact 5 which is connected to the electromagnet device 6 via a driving plate 7 and is driven to rotate. Here, the upper end of the remote contact 5 and the hanging piece 7a of the drive plate 7
And a contact pressure spring 8 for applying a contact pressure to the remote movable contact 44 fixed to the remote contact 5. The remote contact 5 is supported by the driving plate 7 so as to be capable of seesaw movement.

Now, when a remote control signal for interrupting the electric circuit is input to the electromagnet device 6, the movable iron core 6a of the electromagnet device 6 moves upward, whereby the drive plate 7 moves counterclockwise about the shaft 7a as a fulcrum. The remote contact 5 fixed to the driving plate 7 rotates counterclockwise as shown by a broken line in FIG. Conversely, when a remote control signal for closing the electric circuit is sent, the movable iron core 6a moves downward, and the driving plate 7 rotates clockwise in the opposite direction to that described above by the contraction force of the return spring 20, The remote contact 5 also rotates clockwise.

In this contact breaker, a display device 5 for displaying the open / closed state of the electric circuit by the remote operation is provided.
0, and a display piece 5 that rotates with the rotation of the driving plate 7 from a display window 51 formed on the upper surface of the housing 10.
1a, the remote control state can be identified. The structure of the contact portion, which is a feature of this contact breaker, will be described. In this contact breaker, a fixed contact plate is interposed between the movable contact 3 and the remote contact 5, and a movable contact 4 fixed to the movable contact 3 is provided.
A fixed contact 42 that contacts and separates 1 and a remote fixed contact 43 that contacts and separates a remote movable contact 44 fixed to the remote contact 5 are fixed to the front and back of the fixed contact plate.
Note that the arc traveling plate 17a of the arc extinguishing device 17 is used as the fixed contact plate so as to save space. Here, the arc extinguishing device 17 extinguishes an arc generated when the movable contact 41 and the fixed contact 42 are separated.

Therefore, the electric circuit inside the contact breaker is composed of the power supply terminal 25 and the coil 22 of the electromagnet device 22.
a, a bimetal 21, a conductive frame 24 incorporating the above-described members of the breaking mechanism A, a movable contact 3, a contact 4 (a movable contact 41, a fixed contact 42, an arc traveling plate 17a, a remote fixed contact 43). , Remote movable contact 4
4), formed by the path of the remote contact 5 and the load terminal 9. In the electric circuit, members that are not in contact with each other are connected by a braided wire 28 or the like. A signal line for giving a remote control signal to the remote opening / closing mechanism B is connected to a remote input terminal 26, and the input terminal 26 is connected to the coil 6 b of the electromagnet device 6 by a lead wire 27.

By the way, as described above, the arc traveling plate 17
When a is interposed between the movable contact 41 and the remote contact 44, the substantial insulation distance between the movable contact 41 and the remote contact 44 can be increased. When the fixed positions of the fixed contacts 42 and 43 fixed to the arc traveling plate 17a are shifted up and down, the direction of the current flowing through the movable contact 3 and the arc traveling plate 17a is reversed. Therefore, a magnetic repulsive force is generated between the movable contact 41 and the fixed contact 42, and the moving operation of the movable contact 41 and the fixed contact 42 can be performed well.

Moreover, in the case of this contact breaker, the directions of the currents flowing through the movable contact 3 and the remote contact 5 are also opposite, so that the magnetic repulsive force for rotating the remote contact 5 counterclockwise when the load is short-circuited. This causes the movable fixed contact 41 and the fixed movable contact 42 to be separated when the load is short-circuited.
All 4 are separated. For this reason, the increase in the insulation distance described above,
By increasing the magnetic drive of the movable contact 41 and the cooperative operation when the remote movable contact 44 is short-circuited, it is possible to realize a high limit current blocking performance of the contact breaker.

In the case of the contact breaker, since the shut-off mechanism A is housed at one end of the housing 10 and the remote opening / closing mechanism B is housed at the other end, only the shut-off mechanism A can be housed. Alternatively, only the remote opening / closing mechanism B can be stored. For example, in the case of a structure including only the shut-off mechanism A in FIG. 3, the remote opening / closing mechanism B may be removed as shown in FIG. In this case, the braided wire 28 connects between the load terminal 9 and the arc traveling plate 17a. Hereinafter, this is called a breaker part.

In the case where only the remote opening / closing mechanism B shown in FIG. 3 is provided, as shown in FIG. Here, only the arc traveling plate 17a is left as a fixed contact plate, and the ground traveling plate 17a and the power supply terminal 25 are connected by a braided wire 28. Hereinafter, this is called a relay unit. In this case, the housings 10 having the same shape and dimensions are connected sideways as shown in FIG. 1A or FIG.
Can be configured. The body constituting the housing 10 may be one without an opening such as the handle 1 or the display window 22, but the opening is closed by post-processing according to the type of breaker to be manufactured. You may do so.

The handles 1 of the respective breaker sections are connected by a connecting plate 32, whereby the breakers of the respective poles are interlocked and shut off. By the way, between the breaker unit and the relay unit located at the center, it is necessary to connect the remote opening / closing mechanism unit B of the relay to the path via the breaking mechanism A of the breaker. Therefore, as shown in the right side of FIG. 4, an arc traveling plate 17a used as a central fixed contact plate has a connecting piece 30 extending laterally from an upper end, and a remote fixed contact 43 is fixed to a tip end of the connecting piece 30. I have.
Then, as shown in FIG. 1B, an insertion hole 31 through which the connecting piece 30 is inserted is formed in a side surface of the housing 10 facing the connecting piece 30, and the housing 10 in which the remote opening / closing mechanism B is accommodated. An insertion hole (not shown) through which the connection piece 30 passes is formed on the side surface.

In this way, when the breaker portion and the relay portion are connected in series, the remote fixed contact 42 fixed to the connecting piece 30 comes into contact with the remote movable contact 44 of the remote contact 5 as shown in FIG. 3 can be formed. According to the structure of the present embodiment, there is obtained an advantage that a contact breaker for easily remotely controlling a load that always needs to constantly charge a storage battery such as an emergency light can be formed. Further, since the contact of the remote opening / closing mechanism B of this embodiment is a normally-excited b-contact, when the load is an emergency light,
When the remote control signal is not input, the electromagnet device 6 is in a non-excited state, and at this time, the remote contact is closed, so that the illumination is preferably turned on.

[0022]

As described above, according to the present invention, one pole is provided with a shutoff mechanism for shutting off the electric circuit in conjunction with the operation of the steering wheel or the operation of the abnormal current detector, and the other pole is provided with the shutoff mechanism and the remote control. A remote opening / closing mechanism that closes and cuts off an electric circuit in accordance with a signal; a first load terminal to which a load is connected via the breaking mechanism; and a load connected via both the breaking mechanism and the remote opening / closing mechanism. And the interlocking mechanism of each pole is interlocked, so that a path via the intercepting mechanism of each pole can be used as an electric path for constantly charging the storage battery provided with the load, Also, the path through the remote opening / closing mechanism of one pole and the other pole can be used as an electric path for remotely controlling the operation of the load. It can be manipulated. Further, since the contact of the remote opening / closing mechanism is always a contact b of the excitation type, the load can be driven when a remote control signal is not input, and this is effective when the load is emergency lighting or the like.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are a perspective view showing an external appearance of an embodiment of the present invention, and an exploded perspective view showing a connection structure of the same.

FIG. 2 is a side view as seen from the direction of the line AB in FIG. 1 (a).

FIG. 3 is a circuit diagram showing an internal circuit configuration of the above.

FIG. 4 is a perspective view showing a structure of an arc traveling plate as a fixed contact plate used in the embodiment.

FIG. 5 is a sectional view taken along line CD of FIG.

FIG. 6 is a sectional view taken along line EF of FIG.

FIG. 7 is a cross-sectional view of a basic contact breaker used to configure the present embodiment.

[Explanation of symbols]

 A shut-off mechanism B remote open / close mechanism 1 handle 2 abnormal current detector 9 load terminal 32 connecting plate 43 remote fixed contact 44 remote movable contact

Claims (1)

(57) [Claims] An electric pole is provided with a cut-off mechanism for interrupting an electric circuit in response to operation of a steering wheel or an operation of an abnormal current detecting section. A first load terminal that includes a remote opening / closing mechanism that performs cutoff and is connected to a load via the blocking mechanism; and a second load terminal that is connected to a load via both the blocking mechanism and the remote opening / closing mechanism. A contact breaker, wherein the contact mechanism of the remote opening / closing mechanism is configured as a normally-excited b-contact, by interlocking the blocking mechanism of each of the poles.