JP2506388Y2 - Switch - Google Patents

Description

[Detailed description of the device]

[0001]

This invention relates to a switch, especially
The present invention relates to improvement of a mounting structure of a switch used in an electric circuit such as a power circuit.

[0002]

2. Description of the Related Art When a switch used in an electric circuit such as a power circuit is to be maintained and inspected, it is necessary to prevent a voltage from being applied to the switch. For this reason, a technique of providing a disconnecting function inside the switch to be inspected for maintenance has been proposed in Japanese Patent Application No. 2-188497 by the present inventor.

FIG. 4 is an external view of the above-mentioned proposed switch. Referring to FIG. 4, in the switch, the switch main body 1 and the power source side terminal block 2 are integrally formed. In addition to overload protection and short circuit protection, this switch can open and close the circuit by opening and closing the contacts inside the switch using an electromagnet. These functions are base 3, covers 4 and 5
It is included in the switch main body 1 having a housing. A control handle 15 for switching the switch body 1 to a mode such as "AUTO" or "TEST" is provided.

[0004]

In the switch shown in FIG. 4, if the disconnecting mechanism provided in the power supply side terminal is set to the disconnecting state, the operation of the switch can be confirmed without sending electricity to the load circuit. Alternatively, simple maintenance inspection such as measuring the insulation resistance value can be performed. However, in the case of maintenance / inspection that requires removal of the switch body, such as replacement of the internal contacts of the switch body, the disconnect switch separately placed on the power supply side must be disconnected. However, in the case of a motor control center in which multiple circuits are centrally controlled, a single disconnector requires a power outage of multiple circuits in order to inspect one circuit. Therefore, a complicated extraction disconnecting mechanism is often provided for each circuit instead of the disconnecting switch for each circuit, resulting in a large control panel.

On the other hand, as a simple disconnecting structure for a normal switch, there is a plug-in type as shown in FIG.
When the terminal portion 31 is separable from the switch body portion 1, the terminal portion 31 is arranged in the switch body 1 and attached to the attachment angle 32, so that a deep installation space is required.

Therefore, the main object of the present invention is to perform a simple inspection without removing the switch main body, and even when removing the switch main body, it is not necessary to turn off the power supply, and the switch can be installed in a small volume. Is to provide.

[0007]

This invention has a disconnecting mechanism between a power source side terminal portion and a switch body portion, and a power source side in which the relative position of the power source side terminal portion and the switch body portion does not change during disconnection operation. The terminal portion and the switch body portion are configured to be separable from each other.

[0008]

In the switch according to the present invention, the switch main body can be disconnected from the power source by the internal disconnecting mechanism, and the power source side terminal portion can be separated from the switch main body portion as the power source side terminal block. Only the switch body can be removed from the mounting surface. Moreover, since the extraction mechanism is not required, the overall size can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 are views showing an embodiment of the present invention, and FIG. 1 is a partial front and side sectional view showing a main part of a power source side terminal portion, Disconnection mechanism 6
Shows the state of being connected. 2 shows a state in which the disconnecting mechanism 6 of FIG. 1 is disconnected, and FIG. 3 shows a power source side terminal block 2
FIG. 3 is a front view and a side sectional view of FIG.

Next, one embodiment of the present invention will be specifically described with reference to FIGS. 1 to 3. Similar to the description of FIG. 4, the switch is composed of the switch main body 1 and the power source side terminal block 2. In addition to overload protection and short circuit protection, the switch can also open and close the contacts inside the switch using an electromagnet to open and close the circuit, and these functions have a base 3, covers 4 and 5 Included in. The switch body 1 also includes a control handle 15, and FIG. 1 shows a state in which the control handle 15 is set to “AUTO”. Switch body 1 and power supply side terminal block 2
The switch main body 1 includes a disconnecting mechanism 6 for electrically disconnecting the switch main body 1 from the power source side terminal block 2 in a state where the switch main body 1 is connected.

The disconnecting mechanism 6 is operated by the control handle 15, and the lever 7 of the disconnecting mechanism 6 and the three-pole interlocking disconnecting lever 8 made of an insulating material, which is engaged with the tip of the lever 7.
And a pair of connecting conductors 9 are attached to the three-pole interlocking disconnecting lever 8 for each pole. The connection conductor 9 electrically connects the first blade 10 which is the power source side end of the switch body 1 and the second blade 12 which is the blade portion of the power source side terminal plate 11 attached to the power source side terminal block 2. be able to. The first blade 10, the second blade 12 and the connecting conductor 9 are thin copper plates, and a leaf spring 14 is provided outside each connecting conductor 9 so that contact pressure can be obtained at the time of connection.
Is provided.

As shown in FIG. 3, the power source side terminal block 2 is a three-pole integrated type, and the power source side terminal plate 11, the terminal screw 16, the nut 17, and the insulating block 1 common to each pole for each pole.
3 and has a mounting plate 10 with a mounting screw 18.
It is attached to 0. On the other hand, the switch body 1 is screwed into the mounting hole 19 provided on the power supply side of the switch body 1 and the mounting hole 21 provided on the load side, which correspond to the mounting holes 20 provided on the power supply side terminal block 2. It is attached to the attachment plate 100.

Therefore, the flow of electricity is such that the electric wire from the power source is connected to the power source side terminal board 11 by the terminal screw 16, and the second blade 12, the connecting conductor 9 and the first blade 1 are connected.
After passing through 0, it enters the inside of the switch body 1 and is guided from the load side terminal 22 to the load.

In order to operate the disconnecting mechanism of the switch 6, the control handle 15 is operated to select "ISOL" or "T".
EST ”. In this setting process, lever 7
Moves upward, and the connecting conductor 9 also moves upward together with the 3-pole interlock disconnecting lever 8 engaged with the lever 7. After this, the connecting conductor 9 is disconnected from the first blade 10 and the second blade 12 in a disconnected state.

The control handle 15 is "AUTO".
If it is set to "TEST", the contact of the switch can be opened and closed by the electromagnet, and if it is set to "ISOL" and "OFF", the contact of the switch can not be opened and closed by the electromagnet. Has become. Therefore,
If it is an inspection to confirm the opening / closing function of the contact without sending electricity to the load circuit, the control handle 15 is set to “TE
It is sufficient to set to "ST" to operate the disconnecting mechanism to disconnect and to operate the electromagnet, and it is not necessary to remove the switch main body 1. On the other hand, when the switch body 1 is to be removed, the control handle 15 may be set to "ISOL" and the screws attached to the mounting holes 19 and 21 may be removed.

[0016]

As described above, according to the present invention, it is possible to perform a simple inspection simply by activating the disconnecting function inside the switch without removing the switch body, and even when it is necessary to remove the switch. Since it can be easily removed without turning off the power, there is no need to install another disconnecting switch or a complicated extraction mechanism on the power supply side of the switch, so it is inexpensive, has a small mounting area, and has a small depth dimension. It becomes possible to produce such as.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a front surface and a side surface showing a main part of a power supply side terminal portion, showing a state in which a disconnecting mechanism is connected.

FIG. 2 is a diagram showing a state in which the disconnecting mechanism of FIG. 1 is disconnected.

FIG. 3 is a front view and a side sectional view of a power supply side terminal block.

FIG. 4 is an example of a conventional technique and is a diagram corresponding to FIG. 1.

FIG. 5 is a side view of an ordinary switch, which is another example of the conventional art.

[Explanation of symbols]

 1 Switch Main Body 2 Power Supply Side Terminal Block 3 Base 4, 5 Cover 6 Disconnection Mechanism 7 Lever 8 3 Pole Interlocking Disconnection Lever 9 Connection Conductor 10 First Blade 11 Power Supply Side Terminal Plate 12 Second Blade 13 Insulation Block 14 Leaf Spring 22 Load side terminal

Claims (1)

(57) [Scope of utility model registration request] 1. A disconnecting mechanism is provided between the power source side terminal portion and the switch body portion so that the relative position of the power source side terminal portion and the switch body portion does not change during disconnection operation, and the power source side terminal portion and the switch body are provided. A switch, characterized in that it can be separated from the switch body.