JPH08148202A - Terminal block - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a terminal block that does not short-circuit a plurality of terminals when an external power supply of another system is connected and can short-circuit when one external power supply is connected. A terminal block having a plurality of terminals 4 and 5 is provided with a cover 3 for preventing electric wires from being connected, and a spring switch 6 for opening and closing the connection between the terminals, and the spring switch when the cover 3 is attached. 6 is closed and the terminals are short-circuited,
This is a terminal block that opens the spring switch 6 when the cover 3 is removed. Then, when the external power supply of another system is connected, the plurality of terminals are not short-circuited, and when the one external power supply is connected, the plurality of terminals can be short-circuited, so that the power supply can be prevented from being erroneously short-circuited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block for connecting an electric wire from the outside by using a screw.

[0002]

2. Description of the Related Art When inputting a plurality of power supplies from the outside or switching distribution to a plurality of systems with one external power supply,
A shorting piece may be installed between the terminals of the power input terminal block. That is, when connecting different external power supplies to each power supply system of the device, separate wiring to each terminal block, and when using a common power supply for multiple power supply systems of the device, externally connect only to specific terminals. Connect the power supply and attach a shorting piece between the common terminals.

[0003]

However, in the conventional terminal block, it is possible to connect different power supplies to the respective terminals which are erroneously short-circuited while the short-circuit piece is attached, and in that case, the power supply is short-circuited. , There was a possibility of a big accident.

The present invention has been made in view of the above circumstances, and an object thereof is not to short-circuit a plurality of terminals when an external power supply of another system is connected and short-circuit when a single external power supply is connected. It is to provide a terminal block that can.

[0005]

In order to achieve the above object, the present invention provides the following terminal block. (1) A cover for preventing an external line from being connected and a switch for opening and closing the connection between terminals are provided. (Claims 1 and 2) (2) A terminal and a short-circuit piece for short-circuiting the terminals are incorporated and an insulating cover is provided to cover the terminals so that an external wire cannot be connected.
(Claim 3) (3) A terminal and a short-circuit piece that short-circuits the terminal are configured to close at least one of the terminal screw holes. (Claims 4 and 5) (4) A short-circuit piece having a shape in which an electric wire cannot be connected unless a short-circuit piece that short-circuits the terminals is removed. (Claims 6 and 7) (5) A fuse is built in a short-circuit piece that short-circuits terminals. (Claim 8)

[0006]

In the terminal block according to claims 1 and 2, when the cover is removed, the switch of the terminal block opens and the terminals are not connected, and when the cover is attached, the electric wires cannot be connected, and at the same time, the switch between the terminals. Is closed and the terminals are short-circuited.

In the terminal block according to the third aspect, when the cover is removed, the terminals are not connected, and when the cover is attached, the electric wires cannot be connected, and at the same time, the terminals are short-circuited.

In the terminal block according to claims 4 and 5, at least one of the terminal screw holes is closed by the short-circuit piece. Therefore, when connecting the electric wire to the terminal, the short-circuit piece must be removed.

In the terminal block according to claims 6 and 7, when connecting an electric wire to the terminal, the short-circuit piece is removed. In the terminal block according to claim 8, when an external wire is connected to the two terminals without removing the short-circuit piece and an overcurrent flows, the fuse is blown and the short-circuit state can be avoided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. The figure shows a cross-sectional view of a terminal block having two terminals. The shaded portions are terminals 1 and 2 and the material is a conductor. The cover 3 at the top of the figure is an insulator. Terminals 4 and 5 when the cover 3 is not attached
Is not connected because the spring switch 6 is opened, and the wires can be connected to the terminals 4 and 5. Although not shown in the figure, the terminals 1 and 2 are assumed to be connected to different circuits by a printed circuit board. When the cover 3 is attached, the spring switch 6 is closed, the terminals 4 and 5 are short-circuited, and the terminal 4 cannot be connected to the electric wire.

Next, a second embodiment will be described with reference to FIG. The figure shows one terminal block 15a and an insulating frame 18.
In the case of two fixed terminals, terminals 11 and 12 are assumed to be connected to separate circuits. As in the case of the first embodiment, when the cover 13 is attached, the switch 16 is closed and the terminals 11 and 12 are short-circuited, so that the electric wire cannot be connected to the terminal block.

Next, a third embodiment will be described with reference to FIG. The figure shows a cover 23 in which a short-circuit piece 29 is incorporated in an insulating cover 23, and the cover 23 and two-pole terminals 24, 2
5 is also provided with a connector socket 30. When the cover 23 is attached, the terminals 24 and 25
Is short-circuited through the short-circuit piece 29 inserted in the connector socket 30, and the terminal 24 cannot be connected to the electric wire.

Next, a fourth embodiment will be described with reference to FIG. The figure shows that the connector socket 40 is provided below the screw hole 44b on the terminal 44 side, and the short-circuit piece 39 is attached to the socket 40.
, The terminal block 44b is closed so that the electric wire cannot be connected.

Next, a fifth embodiment will be described with reference to FIG. The figure shows the movable short-circuit piece 59 screwed into the terminal 54.
Therefore, the state in which the wire cannot be connected to the terminal 54 unless the short-circuit piece 59 is removed is shown.

Next, a sixth embodiment will be described with reference to FIG. In FIG. 6A, the short-circuit piece 69 on the electric wire connection side of the terminal 64 has a downward bent portion 69a that is bent upward from the terminal 64 and then downward from the terminal 64. Figure 6
(B) has an upward bent portion 79a that is bent downward from the terminal and then bent upward. With the short-circuit pieces 69, 79 connected, the short-circuit pieces 69, 79 on the terminals 64, 74 side
Wires cannot be connected to the upper or lower side.

Next, a seventh embodiment will be described with reference to FIG. In the figure, convex portions 89a are provided on the upper and lower portions of the short-circuit piece 89 on the terminal 84 side, and when the short-circuit piece 89 is connected, electric wire connection cannot be made to the upper side or the lower side of the short-circuit piece 89 on the terminal 84 side.

Next, an eighth embodiment will be described. The short-circuit piece that short-circuits the two terminals is made of a fuse, and the fuse is designed to be blown when an overcurrent flows, such as when connecting different power supplies without removing the short-circuit piece.

[0018]

According to the present invention, a plurality of terminals are not short-circuited when an external power supply of another system is connected, and a plurality of terminals can be short-circuited when one external power supply is connected. Can be prevented from being short-circuited.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention,

FIG. 2 is a configuration diagram showing a second embodiment of the present invention,

FIG. 3 is a configuration diagram showing a third embodiment of the present invention,

FIG. 4 is a configuration diagram showing a fourth embodiment of the present invention,

FIG. 5 is a configuration diagram showing a fifth embodiment of the present invention,

FIG. 6 is a configuration diagram showing a sixth embodiment of the present invention,

FIG. 7 is a configuration diagram showing a seventh embodiment of the present invention.

[Explanation of symbols]

4, 5, 14, 15, 24, 25, 34, 35, 45,
54, 55, 64, 65, 74, 75, 84, 85 ...
Terminals, 3, 13, 23 ... Cover, 6 ... Spring switch, 16 ... Switch, 30, 40 ... Connector socket, 39, 59, 69, 79, 89 ... Short-circuit piece.

Claims (8)

[Claims] 1. A terminal block having a plurality of terminals, comprising a cover for preventing electric wires from being connected, and a switch for opening and closing the connection between the terminals, and when the cover is attached, the switch is closed and the terminals are short-circuited. The terminal block is characterized by opening the switch when the cover is removed. 2. A cover for preventing an electric wire from being connected, and a switch for opening and closing the connection between the terminal and another terminal, the switch being closed when the cover is attached,
A terminal block that opens the switch when the cover is removed. 3. A terminal block having a plurality of terminals, comprising an insulating cover for covering the terminals so that an electric wire incorporating a short-circuiting piece for shorting the terminals cannot be connected, and short-circuiting the terminals when the cover is attached. A terminal block featuring. 4. A terminal block having a plurality of terminals, comprising a screw hole of the terminal and a connector socket provided below the screw hole and connected to the terminal, and between the terminals connected to the socket through the terminal screw hole. A terminal block characterized in that the electric wire cannot be screwed to the terminal without removing the short-circuit piece. 5. A terminal block having a plurality of terminals, comprising a short-circuit piece which can be screwed into a screw hole of one terminal and can be connected to the other terminal by a movable piece connected by a nut. The terminal block is characterized in that the electric wire cannot be screwed to one of the terminals unless the short-circuit piece connected to the terminal is removed. 6. In a terminal block having a plurality of terminals, the shape of a short-circuit piece for short-circuiting terminals is bent above and below a screw terminal on the wiring direction side of the terminal, and the short-circuit piece must be removed. A terminal block characterized in that the wires cannot be screwed to the terminals. 7. In a terminal block having a plurality of terminals, the shape of the short-circuit piece for short-circuiting the terminals is such that the thickness of the portion other than the screw is larger than the thickness of the screw portion of the terminal, and the short-circuit piece must be removed. The terminal block is characterized in that it cannot be screwed in. 8. In a terminal block having a plurality of terminals, a fuse is built in a short-circuit piece that short-circuits the terminals, and an electric wire is connected to two terminals without removing the short-circuit piece and an overcurrent flows. A terminal block characterized by a blown fuse.