JPH0753245Y2 - Alarm device for earth leakage breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a configuration of an alarm device that is built in an earth leakage circuit breaker and that transmits the occurrence of a breaking operation of the earth leakage circuit breaker to the outside.

[Conventional technology]

This type of alarm device is usually built in a three-pole earth leakage circuit breaker, and the part inside the earth leakage circuit breaker is the width of the earth leakage circuit breaker (hereinafter simply referred to as circuit breaker) as shown in FIG. One side of the opening / closing mechanism 101 having a small width direction dimension, which is located in the central portion of the direction and drives the movable contacts to open / close collectively, and is arranged on the other side to receive a zero-phase current and enter the closed state. An earth leakage trip unit 102 that separates the engagement of a certain opening / closing mechanism 101 and the engagement of a display piece that mechanically displays the breaking operation.
The opening and closing mechanism 101 is sandwiched between and and the alarm device 100 is operated by the opening and closing mechanism 101 . 7 and 8 show the structure of the opening / closing mechanism 101 .

A holder 12 which is driven to rotate around a drive shaft (not shown) integrally with a movable contactor 11 (Fig. 7) of the circuit breaker is connected to a handle 1 via toggle links 13 and 14 (Fig. 8),
A connecting point 15 of the toggle links 13 and 14 and a claw 3 rotatably attached around a pin 2 which inserts the side plate 20 in a direction perpendicular to the paper surface are connected via a U-shaped connecting pin 17. There is. FIG. 7 shows the closed state of the circuit breaker. In this state, the tip of the claw 3 is engaged with the catch 18, and the breaker spring is stretched between the side plate 20 (FIG. 8) and the connecting pin 21. 22 (Fig. 7) has been stretched to its maximum tension. Now, when a large current passes through the circuit breaker, the overcurrent trip magnet 23 operates and the armature 24 is attracted in the direction of the arrow, the other end of the armature 24 pushes the catch 18 and catches it counterclockwise. By rotating the claw 3 and the catch 18, the engagement between the claw 3 and the catch 18 is released,
It is driven to rotate clockwise through (Fig. 8), the toggle links 13 and 14 bend to the state shown in Fig. 8, and the connecting pin 21 slides inside the elongated hole to move up the holder 12 (Fig. 7). The holder 12 is pulled to rotate the holder 12 in the clockwise direction, and the movable contact 1 is driven to open and close.

At the time of loading, prior to loading, when the handle 1 is rotated clockwise to move the connecting pin 16 to the upper left along the inside of the arcuate elongated hole, the toggle links 13 and 14 are extended and the connecting point 15 is formed. After moving to the right, the claw 3 rotates counterclockwise through the U-shaped connecting pin 17, and the tip 18 is engaged with the catch 18 to reset the opening / closing mechanism.

When the handle 1 is rotated counterclockwise in this state, the connecting pin 16 moves the connecting point 15 through the toggle link 14 in an arcuate direction counterclockwise around the engagement point between the claw 3 and the connecting pin 17. Then, the connecting pin 21 slides inside the elongated hole downward to drive the holder 12 (FIG. 7) in the closing direction.

By the way, an alarm device which is actuated at the time of the breaking operation of the circuit breaker by the opening / closing mechanism configured as described above is not particularly illustrated here, but for example, when the circuit breaker is closed, the rear surface 3a of the pawl 3 is right-sided from the right side. An actuator that has a strip-shaped arm that is pressed by the spring force and that is perpendicular to the paper surface, and that is erected at the other end of the arm to hang down below the paper surface and turn its lower end around a spindle. The side plate of the opening / closing mechanism is configured as a unit in which the on / off state of the internal contact is switched by the actuator and the microswitch main body and the return spring that applies the spring force to the arm of the actuator are integrated on a common base. Attached to. When the circuit breaker is closed, the contact of the micro switch is in the off state. When the circuit breaker performs the breaking operation and the claw 3 rotates clockwise, the arm moves to the left due to the force of the return spring. The actuator rotates counterclockwise, the contact of the micro switch is turned on, and an electric signal is output via this turned on contact.
Occurrence of the breaking operation is transmitted.

[Problems to be solved by the device]

The problems with the conventional alarm device configured as described above are as follows. That is, in a conventional alarm device, a support shaft for rotatably supporting an actuator having a long arm, and a return spring wound around the support shaft to apply a force for pressing the arm to the claw of the opening / closing mechanism are provided. , A microswitch main body, and the like have a base forming a relatively large-sized structure, and a space of about one pole of the circuit breaker is required to install the alarm device. If this is applied to a two-pole circuit breaker, there is a problem that the width of the circuit breaker needs to be widened and the circuit breaker becomes large.

An object of the present invention is to provide a configuration of an alarm device that can be installed in a two-pole circuit breaker without increasing the width and height of the circuit breaker.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention has a shaft hole into which a shaft whose axial position is fixed is inserted, and rotates around the shaft from the closing position toward the closing position at the time of blocking, and automatically moves to the closing position. An alarm device having a member that does not recover as a constituent member of an opening / closing mechanism for transmitting the occurrence of a breaking operation of an earth leakage breaker is formed by forming a rod into a U shape, and one of two opposing sides of the member is the member. It is inserted into the shaft hole and is coupled with another member at the tip end, and the other end is inserted into a hole formed in a member different from the shaft hole of the member, and the rotation of the member is transmitted to the outside through the different member. It shall be configured with U-shaped pins.

[Action]

In this way, the alarm device uses a U-shaped pin in which one of the opposite sides is inserted into the shaft hole of the member (claw) that rotates around the fixed axis line, and the other is inserted into the hole of a different part from this shaft hole. With this configuration, the rotation of the member at the time of interruption can be transmitted to the outside through the U-shaped pin, and a strip-shaped actuator, for example, at a right angle to this side, can be provided at the tip of one side through which the shaft hole is inserted. By installing the device with the micro switch body directly attached to the side plate of the opening / closing mechanism as well as the installation, the only space required for the alarm device installation is the space where the micro switch body can be installed. The alarm device can be installed without increasing the width of the breaker.

〔Example〕

1 shows an embodiment of the configuration of an alarm device according to the present invention in FIG.
As shown in FIG. 4, one end of the U-shaped pin 10 constituting the alarm device is formed to be longer than the other end, and the tip end thereof is cut off in a half-moon shape. To facilitate relative non-rotational coupling with another member about the axis. This one side 10a is inserted by removing the linear pin 2 into the shaft hole into which the conventional simple linear pin (Fig. 9) was inserted, and the other short side 10b is attached to the claw 3.
A hole 3b (Fig. 3) is formed in the hole, and the claw 3 is rotated around the fixed axis from the back side of the paper surface via the U-shaped pin 10 (side of the earth leakage trip unit 102 , Fig. 6). Please refer to)). On the front side of the paper, one side of the U-shaped pin 10
Insert the top 6 into the half-moon shaped notch at the end of a
A leaf spring 8 which is connected to the side 10a in a non-rotatable manner and extends obliquely downward to the right from the top 6 is used as an actuator to push the button portion of the microswitch.

FIG. 2 shows a state in which the alarm device configured as described above is incorporated in the earth leakage breaker. The alarm device 103 is built in the earth leakage trip unit 102 on the opening / closing mechanism side without increasing the width of the circuit breaker. Reference numeral 9 in the figure is a display piece for mechanically displaying the breaking operation of the circuit breaker, and the engagement trip is made by the earth leakage trip unit 102 to project from the case surface of the circuit breaker to display the breaking operation.

FIG. 3 is a view showing a portion of the hole 3b of the claw 3 into which one of the opposite two sides 10b of the U-shaped pin 10 (FIG. 4) constituting the alarm device is inserted. Since the hole 3b can be formed in one place of the plate material without changing the conventional shape of the claw and without impairing the strength of the claw, it does not increase the cost of the alarm device.

[Effect of device]

As described above, the present invention is provided with the shaft hole through which the shaft whose axial position is fixed is inserted, and is rotated around the shaft from the closing position toward the closing position and automatically returns to the closing position when the shaft is closed. An alarm device for transmitting the occurrence of the breaking operation of the earth leakage breaker having a member not included as a constituent member of the opening / closing mechanism to the outside is made by forming a rod into a U shape, and one of two opposing sides of the alarm device is the shaft of the member. U which is inserted through the hole and is coupled to another member at the tip end, and the other end is inserted into a hole formed in a portion different from the shaft hole of the member to transmit the rotation of the member to the outside through the another member Since the configuration is provided with the shape pin, the rotation of the member that rotates in the direction of the breaking position around the axis whose position is fixed and stays in the breaking position during the breaking operation of the circuit breaker is inserted through the shaft hole of the member. Transmitted to the outside through one of the two opposite sides of the U-shaped pin By attaching an actuator to this side, an alarm device in which the microswitch body is directly attached to the side plate of the opening / closing mechanism and the members are arranged in a distributed manner can be provided. Since the alarm device is formed without the need for an integral structure in which the return spring is integrally mounted on the base, the circuit breaker with a two-pole structure can be built in without increasing the width or height of the circuit breaker. It will be possible. Of course, this configuration can be applied to a three-pole circuit breaker, and since the cost does not require a base that requires many processing steps as in the conventional case, there is a merit that it is not so large but reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of an alarm device according to an embodiment of the present invention, and FIG.
FIGS. 2A and 2B are a top view and a side view of the earth leakage breaker showing a state in which the alarm device having the configuration shown in FIG. 1 is incorporated in the earth leakage breaker, and FIG. 3 is an alarm of the present invention. FIG. 4 is a perspective view showing a structural example of the U-shaped pin according to the present invention, and FIG. 4 is a side view of the main part of the opening / closing mechanism showing the hole portion of the claw into which one of the two opposite sides of the U-shaped pin constituting the device is inserted. 5 and 5 are explanatory views showing a built-in portion of an alarm device in a conventional three-pole circuit breaker, FIG. 6 is an explanatory view showing a built-in portion of a two-pole circuit breaker of an alarm device according to the present invention, and FIG. FIG. 8 is a side view showing an example of a conventional configuration of an earth leakage circuit breaker to which the present invention is applied, FIG. 8 is a side view of a main part of an opening / closing mechanism of the earth leakage circuit breaker shown in FIG. 7, and FIG. 9 is a conventional alarm device. It is a perspective view which shows the structure of the pin penetrated by the shaft hole of a nail. 3: Claw (member), 6: Top (separate member), 10: U-shaped pin, 100 , 1
03 : Alarm device.

Claims (1)

[Scope of utility model registration request] 1. An opening / closing mechanism comprising a shaft hole through which a shaft whose axial position is fixed is provided and which rotates around the shaft in the direction from the closing position to the closing position when shutting off and does not automatically return to the closing position. An alarm device for transmitting to the outside the occurrence of a breaking operation of an earth leakage breaker as a member, wherein a bar material is formed in a U shape, and one of two opposite sides thereof is inserted into a shaft hole of the member. A U-shaped pin is provided which is connected to another member at the tip end and the other end is inserted into a hole formed in a portion different from the shaft hole of the member to transmit the rotation of the member to the outside through the another member. An alarm device for an earth leakage breaker, which is characterized in that