JPH07111861B2 - Circuit and breaker terminal block - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker or disconnector for connecting an external lead wire from an external device in a circuit breaker or a breaker and an internal lead wire from an internal accessory device of the circuit breaker or breaker. Regarding the terminal block.

[0002]

2. Description of the Related Art Conventionally, as a terminal block for circuits and circuit breakers,
There is one disclosed in Japanese Utility Model Publication No. 58-41565.
That is, as shown in FIG. 7, the lead wire terminal portion 2 is provided on the side surface portion 1a of the circuit breaker and the circuit breaker, and the external lead wire 3 is screwed to the lead wire terminal portion 2 and these lead wires 3
Is arranged so as to be parallel with the side surface portion 1a after being temporarily drawn out in a direction orthogonal to the side surface portion 1a of the circuit breaker 1 and then curved. According to this terminal block, the space for arranging the lead wire 3 on the side of the circuit breaker or the circuit breaker 1 becomes large, and the distance A between the adjacent circuit breakers or the circuit breaker 1 becomes large. When a large number of circuits and circuit breakers 1 are installed side by side, there is a problem that the switchboard becomes large.

In order to improve this, the inventor of the present application has previously proposed the one shown in Japanese Utility Model Application No. 61-142512. As shown in FIG. 8, a step-like lead wire terminal portion 4 is provided on the side surface portion 1 a of the circuit breaker 1 and the circuit breaker 1.
Then, the external lead wire 3 is connected to the terminal plate 5 of the lead wire terminal portion 4 by screwing and is drawn out so as to be parallel to the side surface portion 1a. According to this terminal block, the distance between adjacent circuits and the breaker 1 is determined by the lead wire terminal portion 4.
Since the width dimension B is sufficient, the distribution board can be downsized.
In this case, the lead wire (not shown) drawn out from the circuit breaker or the internal accessory device of the circuit breaker 1 is usually connected to the lower end portion of the terminal plate 5 in the lead wire terminal portion 4 by soldering.

[0004]

The terminal block of the circuit breaker or circuit breaker shown in FIG. 8 (Japanese Utility Model Application No. 61-142512) has an opening formed in the side wall of the circuit breaker or circuit breaker 1. The lead wire drawn out from the inside of the circuit breaker or the breaker 1 through this opening is connected to the lower end of the terminal plate 5, but the connecting work is a small space of width B, and also on the side wall. It must be carried out through the formed opening, and therefore, to ensure the reliability of the electrical connection of the connection, skilled technique is required, and it requires a lot of man-hours and special tools. Since it is necessary, there is a problem that the working time is long.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a terminal block for a circuit or a breaker which can easily connect internal lead wires and improve productivity. There is.

[0006]

A terminal block for a circuit breaker or circuit breaker according to the present invention is provided with an inner insulating barrier mounted on a side surface of the circuit breaker or the circuit breaker and an outer insulating barrier parallel thereto.
A lead wire terminal portion formed in a step shape is provided between the inner and outer insulating barriers, and an external lead wire terminal to which an external lead wire from an external device is connected to the lead wire terminal portion and a circuit breaker or a disconnector. An inner lead wire terminal to which an inner lead wire from an internal accessory is connected is attached, and the outer lead wire terminal is formed so that the attaching direction of the outer lead wire is parallel to the inner and outer insulating barriers, and A second opening is formed in a portion of the insulating barrier facing the lower space of the lead wire terminal portion, and a lower portion between the inner and outer insulating barriers is opened to be continuous with the first opening. Is formed, and the second opening is formed so as to be covered with a detachable cover.

[0007]

According to the circuit block or the breaker terminal block of the present invention, when an external lead wire from an external device is connected to the external lead wire terminal attached to the lead wire terminal portion, the external lead wire terminal is connected to the external lead wire. Since the mounting direction of the wire is formed so as to be parallel to the inner and outer insulating barriers, the space on the side of the circuit and the breaker can be reduced. When connecting the internal lead wire from the internal accessory device of the circuit breaker or the disconnector to the internal lead wire terminal of the lead wire terminal portion, the connecting work is not limited to the first opening formed in the inner insulating barrier. ,
Since it can be performed by using the second opening in the lower portion between the inner and outer insulating barriers, even if the width of the lead wire terminal portion is small, the operating range of the tool such as a screwdriver is wide and the operation is easy. This makes connection work easier.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will now be described with reference to FIGS.
Will be described with reference to. The circuit breaker 10 has a cover 11 and a case 12 made of an insulating material to form a box, and incorporates a breaking mechanism unit and an accessory device (not shown). The lead wire terminal portions 13 for constructing the terminal block are formed symmetrically in three steps in a symmetrical manner, and the lead wire terminal portions 13 are sandwiched on both side surfaces, that is, on the side of the circuit and the disconnector 10. An inner insulating barrier 14 is provided on the side surface, and an outer insulating barrier 1 parallel to the inner insulating barrier 14 is provided on the opposite side surface.
5 are provided. The inner insulating barrier 14 is formed with a first opening 16 having a stepped upper end surface facing the lower space of the lead wire terminal portion 13 from the central portion to both lower ends thereof, and two opening portions 16 are formed in the central portion. Locking claws 17 are projected. Six external lead wire terminals 18 are attached to the upper surface of the lead wire terminal portion 13, and crimp terminals 20 of external lead wires 19 from an external device are connected to these by screwing with screws 21 (see FIG. External lead wires 19 are arranged in parallel to the inner and outer insulating barriers 14 and 15 (see FIG. 6).

The six inner lead wire terminals 22 are formed integrally with the respective outer lead wire terminals 18, and are extended downward from the outer lead wire terminals 18 so as to face the inner insulating barrier 14. Further, the tip end portion is inclined toward the outer insulating barrier 15 side so as to retract (see FIG. 1), and the tip end portion is burred to form a screw hole 22a. Then, the internal lead wire 23 of the internal auxiliary device attached to the circuit breaker 10 is connected to the upper end 16a of the opening 16.
, And the crimp terminal 24 at the tip thereof is connected to the screw hole 22a of the internal lead wire terminal 22 by screws (see FIG. 4).

The terminal block cover 26 is detachably attached to the upper portions of the inner and outer insulating barriers 14 and 15 so as to cover the upper surface portions of the external lead wire terminals 18 of the lead wire terminal portion 13, and this is a board. Part 27, and two elastic legs 2 extending downward from both ends of the part 27
8 and 29 (see FIG. 3). Among these legs 28 and 29, engaging protrusions 28a and 28a are formed at the lower ends of the legs 28 and 28 on the outer insulating barrier 15 side. When attaching the terminal block cover 26, the leg portions 28 and 29 are lowered from above the lead wire terminal portion 13 so as to be inserted between the inner and outer insulating barriers 14 and 15, and the leg portion 28 elastically moves inward. The deformation progresses, and when the engagement protrusion 28a at the lower end matches the engagement notch 30 formed in the outer insulating barrier 15, it elastically returns to engage with the upper edge 30a thereof. In addition, when removing, insert a tool, for example, a driver 32 into one of the tool insertion holes 31, 31 formed in the board portion 27 so as to correspond to the legs 28, 28, and pry the driver 32 in the direction of arrow C. The engagement protrusion 28a may be disengaged from the engagement notch 30 (see FIGS. 2 and 3) and then pulled upward.

In the lower portions of the inner and outer insulating barriers 14 and 15, the lower portion of the lead wire terminal portion 13 is the inner insulating barrier 1.
The opening 34 is continuous with the fourth opening 16 and a detachable cover 34 is attached so as to cover the second opening 39. The cover 34 includes a substrate portion 35 and leg portions 36, 36 having elasticity extending upward from both end portions of the substrate portion 35, and an engaging hole 37 formed in the leg portion 36 leads. Projection 3 projecting from the wire terminal portion 13
8 (see FIGS. 2 and 3) is attached by being detachably engaged. Thus, the lead wire terminal portion 13 and the inner and outer barriers 14 and 15 configured as described above are provided.
Fits and locks the locking claws 17 of the inner insulating barrier 14 on both sides of the engaging notch 12a formed on the upper side of the case 12, and by mounting the cover 11 on the case 12, It is attached to the side surface of the circuit breaker and the circuit breaker 10 so as not to be pulled out.

According to the above embodiment, the following effects can be obtained.
That is, when connecting the internal lead wire 23 drawn from the circuit or the internal accessory device of the disconnector 1 to the internal lead wire terminal 22 of the terminal block, a tool such as a screwdriver is used to connect the internal lead wire 2
The crimp terminal 24 at the tip of 3 is screwed to the internal lead wire terminal 22 via the screw 25.

In this case, even if the connection surface of the inner lead wire terminal 22 is inclined, the opening 16 formed in the inner insulating barrier 14 and the inner and outer insulating barriers 14 and 15 so as to be continuous with the opening 16. The tool can be operated by utilizing the opening 39 formed in the lower part of the space. Therefore, even if the width dimension D (see FIG. 5) of the lead wire terminal portion 13 is small and the lower space portion of the lead wire terminal portion 13 is small, the operation range of the tool is widened and the work is facilitated. Since the lead wire 23 can be easily connected to the internal lead wire terminal 22, the working time can be shortened and the productivity can be improved. And the connection work is done with the cover 34.
Is attached to cover and protect the connection portion of the internal lead wire terminal 22. Further, since the external lead wire terminal 18 is formed such that the mounting direction of the external lead wire 19 is parallel to the inner and outer insulating barriers 14 and 15, the circuit breaker and the disconnector 10 are connected.
The space on the side of the can be reduced, and a large number of circuits and circuit breakers 1
The distribution board can be downsized even when 0 is installed side by side.

[0014]

According to the terminal block of the circuit breaker and circuit breaker of the present invention, the first opening is formed in a portion of the inner insulating barrier which faces the lower space of the lead wire terminal portion, and the inner insulating barrier is provided between the inner and outer insulating barriers. Since the second opening is formed by opening the lower part of the first opening and is continuous with the first opening, and the second opening is covered by the removable cover, the internal lead wire is connected to the lead wire terminal portion. When connecting to the internal lead wire terminal, it is possible to utilize the first and second openings, and it is possible to increase the operation range of the tool, facilitate the connection work, and improve the productivity.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line XX in FIG. 3 showing an embodiment of the present invention.

FIG. 2 is a side view of the terminal block seen from the outside with a part cut away.

FIG. 3 is an exploded perspective view of a terminal block with a part cut away.

FIG. 4 is a side view of the terminal block as viewed from the inside.

FIG. 5 is a top view with the terminal block cover removed.

FIG. 6 is a diagram corresponding to FIG. 5 showing a wiring state.

FIG. 7 is a top view of a conventional example in which a plurality of circuits and circuit breakers are arranged side by side.

FIG. 8 is a view corresponding to FIG. 7 of a different conventional example.

[Explanation of symbols]

In the figure, 10 is a circuit breaker or breaker, 13 is a lead wire terminal portion, 1
4 is an inner insulating barrier, 15 is an outer insulating barrier, 16
Is a first opening, 18 is an external lead wire terminal, 19 is an external lead wire, 21 is a screw, 22 is an internal lead wire terminal, 22
a is a screw hole, 23 is an internal lead wire, 25 is a screw, 26 is a terminal block cover, 34 is a cover, and 39 is a second opening.

Claims (1)

[Claims] 1. An inner insulating barrier mounted on a side surface of a circuit breaker or a circuit breaker, and an outer insulating barrier parallel to the inner insulating barrier.
A lead wire terminal portion formed between these inner and outer insulating barriers and formed in a step-like shape, and an external lead wire terminal and a circuit wire connected to the lead wire terminal portion and connected to an external lead wire from an external device. An internal lead wire terminal to which an internal lead wire from an internal accessory device of the disconnector is connected,
A first opening is formed in a portion of the inner insulating barrier facing the lower space of the lead wire terminal portion, and a lower portion between the inner and outer insulating barriers is opened to be continuous with the first opening. A second opening is formed and this second
A terminal block for circuits and circuit breakers, characterized in that the opening of is covered with a removable cover.