JPH0227504Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a terminal block used when wiring conductors, such as electric wires, are divided into two systems and connected.

(Prior art) Conventionally, for example, from the power supply connection terminal of an earth leakage breaker
When connecting electric wires for connecting the next feeding equipment, the wiring for the primary power feeding is done with the power terminal block installed separately, which makes the limited space inside the panel even smaller. When the primary power supply wire is connected to the power supply connection terminal of the device, it is not possible to obtain a sufficient connection condition because the power supply connection wire is relatively thick, and as a result, the connected part generates heat and may cause a fire, etc. There was a drawback that it could be dangerous.

In other words, the normal installation method is to attach one electric wire to one terminal that is tightened with one screw, but if two electric wires are attached to one terminal, the tightening becomes loose. Not only do the screws tend to loosen and the electric wires tend to come off from the terminals, but also many problems such as abnormal phenomena occur in electrical control due to poor contact due to loosening.

(Problem that the invention aims to solve) Therefore, when connecting two electric wires to a circuit at an arbitrary terminal, it is common to connect two wires by crossing over to another adjacent terminal. One wire is connected to each terminal.

Therefore, the number of terminals corresponding to the number of wires in the control panel increases, but since multiple terminals are lined up in a row to form a unit, when the number of terminal boards in the control panel increases, e.g. The number of terminal boards increases by one stage, and a considerable amount of space is required between each stage of the terminal board for wiring passages and wiring work, so increasing the number of terminals to accommodate the number of wires makes the control panel smaller. It is no exaggeration to say that this was a hindrance.

Also, due to the miniaturization of control panels, the number of spare terminals is small, and as a result, when the number of wires increases later, two or more wires must be attached to one terminal, which causes problems in wiring connections. There were drawbacks such as the risk of loosening and causing abnormalities in electrical control.

Therefore, the purpose of the present invention is to provide a terminal that can safely and easily connect a primary power supply wire to a single terminal, such as a power supply connection terminal, in a compact state with extremely low connection resistance, without requiring any special space. The purpose is to provide a platform.

(Means for Solving the Problem) That is, the present invention has a synthetic resin base on which a square terminal is attached so as to be movable up and down, and an insert terminal attached to the base by penetrating the wire insertion opening of the square terminal. and,
In order to connect and fix the insert terminal to an external wiring mounting terminal formed on an earth leakage breaker or the like by tightening a screw, an external wiring terminal formed on a protruding part of the insert terminal from the base, and an external wiring terminal formed on the back side of the insert terminal. A square terminal tightening screw is attached to the top surface of the square terminal so that the square terminal can be moved upwardly in order to make a press-contact connection by sandwiching an electric wire for external wiring between the terminal and the inner bottom surface of the square terminal, and The terminal block is provided with the square terminal tightening screw and a tightening screw attached to the upper surface of the insert terminal adjacent to each other in the direction of the electric wire insertion opening for connecting electric wires.

(Example) Next, the configuration of an example of the present invention will be described with reference to the drawings.

An insert terminal 5 is inserted into the synthetic resin base 2 on which the square terminal 1 is mounted so as to be movable up and down, with the external connection terminal 4 protruding from the base 2 through the wire insertion opening 3 of the square terminal 1. In this attached state, the insert terminal 5 is attached to the base 2 so as not to be able to move up and down, and the square terminal 1 is moved upwardly to form a terminal on the back surface of the insert terminal 5 and on both sides of the square terminal 1. The square terminal 1 is inserted through the slit-like elongated hole 6.
A tightening screw 9 for the square terminal 1 is attached to clamp the wiring conductor 8 between it and the wire presser 7, which is attached so as to be movable up and down, and to connect the wiring conductor 8 to the insert terminal 5. insert terminal 5
A synthetic resin terminal cover 11 is attached to the upper end of the base 2, and one protrusion 12 formed on the terminal cover 11 is provided with a keyhole-shaped groove formed on the upper end of the base 2. When the terminal cover 11 is in the closed state, the other protrusion 14 formed on the terminal cover 11 is attached to the upper end of the base 2. The terminal cover 11 is held in the closed state by fitting into the formed square hole 15 for the notch, and when the terminal cover 11 is opened 180 degrees from the closed state, one protrusion 12 formed on the terminal cover 11 is inserted into the keyhole-shaped slot. The terminal cover 11 can be removed from the base 2 along with the straight portion 16 of 13.

Next, the operation of this embodiment will be explained.

When the external connection terminal 4 protruding from the terminal block 17 configured as described above is connected to, for example, the power terminal 19 of the earth leakage breaker 18, the insert terminal 5 of the terminal block 17 applies contact resistance to the power terminal 19 of the earth leakage breaker 18. The insert terminal 5 connected in this way is connected in a negligible direct connection state, and the terminal cover 1 is attached to the insert terminal 5.
In the open state of 1, the conductor 6 of the power input wire is sandwiched between the insert terminal 5 and the wire holder 7 attached to the square terminal 5, and is connected via the tightening screw 9, and the earth leakage breaker 18 is connected. The conductor 6 of the power supply wire for supplying power to the primary feeding device without passing through the insert terminal 5 via the tightening screw 10
With the conductor 6 inserted in a stepped state, it can be directly attached very easily, and by closing the terminal cover 11 in this state, the power wiring of the two systems can be connected directly to the power terminal 19 of the earth leakage breaker 18. It is possible to reliably and easily connect two power supply lines in a state where the contact resistance can be virtually ignored, which is the same as in the case where the contact resistance is negligible.

(Effects of the invention) The present invention is a method of attaching an insert terminal to a synthetic resin base on which a square terminal is movably mounted by penetrating the wire insertion opening of the square terminal, and forming the insert terminal into an earth leakage breaker, etc. An external wiring terminal is formed on a portion of the insert terminal protruding from the base in order to connect and fix the external wiring mounting terminal with screws, and the terminal is connected between the back surface of the insert terminal and the inner bottom surface of the square terminal. A square terminal tightening screw is installed on the top surface of the square terminal to allow the square terminal to move upwardly in order to make a pressure weld connection by sandwiching the external wiring wire, and a square terminal tightening screw is installed in order to connect the external wiring wire to the insert terminal. and a terminal block having a tightening screw attached to the upper surface of the insert terminal adjacent to the wire insertion hole direction.

As a result, the present invention has a simple structure with a small number of parts, connects a primary power supply wire to one terminal, for example, a power supply connection terminal, with extremely low contact resistance, and is safe without requiring any particular space. The effect is that it can be easily connected.

In addition, the terminal block of the present invention does not directly connect the electric wires to the external wiring installation terminals formed on the earth leakage breaker, etc., but instead inserts the external wiring electric wires individually at the top and bottom positions of the front and back of the insert terminal. This is a completely new, easy-to-install terminal block with two terminals that can be connected in series arranged in the wire insertion direction, and has the effect of eliminating crossover wiring and also eliminating the need to connect multiple wires to one terminal. There is.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a cutaway front view thereof, FIG. 3 is a plan view of the terminal cover 11 removed, FIG. 4 is a left side view thereof, and FIG. Its right side view, Fig. 6 is an enlarged view of its dividing groove 13, Fig. 7 is its exploded perspective view, Figs. 8 and 9 are plan views showing its usage condition, and Fig. 10 is for its external wiring. FIG. 3 is a perspective view showing how to connect electric wires. 1... Square terminal, 2... Base, 4... External connection terminal, 5... Insert terminal, 8... Conductor, 9, 1
0...Tightening screw, 17...Terminal block.

Claims (1)

[Scope of utility model registration request] A synthetic resin base on which a square terminal is attached so as to be movable up and down, an insert terminal attached to the base by passing through the wire insertion opening of the square terminal, and an external part of the insert terminal formed on an earth leakage breaker, etc. A terminal for external wiring is formed on the protruding part of the insert terminal from the base in order to connect and fix it to the wiring installation terminal in a screwed state, and a terminal for external wiring is formed between the back surface of the insert terminal and the inner bottom surface of the square terminal. A square terminal tightening screw is attached to the top surface of the square terminal so that the square terminal can move upwardly in order to make a pressure weld connection by sandwiching the electric wire, and the square terminal tightening screw and the electric wire are attached to connect an external wiring electric wire to the insert terminal. and a tightening screw attached to the upper surface of the insert terminal adjacently in the direction of the insertion opening.