JPH0441576Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The present invention relates to a pole board constituting a centralized wiring connector that branches multiple terminal side electric wires from a power supply side cable, and is particularly concerned with a pole board that semi-permanently holds connected electric wires. This invention relates to a terminal board for a type of connector.

<Prior Art> According to an example of a proposal made for the purpose of easily branching from the power supply side cable, a plurality of socket-shaped terminals are arranged vertically and ring-shaped from the horizontal surface of a disc-shaped molded body, and these terminals are There is a structure in which a plug-type connector is detachably inserted from the vertical direction (for example, see Japanese Patent Publication No. 52-21199).

Furthermore, as another type of conventional proposal, several connecting terminals are arranged radially on the circumference of the same plane on the horizontal plane of the disk,
Some of these terminals have a structure in which electric wires are screwed in from the vertical direction.
(see publication).

<Problem to be solved by the invention> In the former technique of the prior art, since the terminals are installed upright from the horizontal surface of the disk, it is not possible to stack the same-shaped distribution structures one above the other, In addition to being difficult to increase the number of branches from the terminal, there was a risk that the connector could easily separate from the terminal.

In the case of the latter conventional technology, in addition to the above-mentioned problems, there is also a risk of abnormally high voltage being applied to the terminal equipment (particularly when two wires are taken out in a single-phase three-wire circuit) due to the loosening of the screws and variations in the tightening pressure. In addition to this, there was the complexity of having to remove the cover when adding branches from the joint box.

The present invention was developed in view of various problems in the prior art, and its purpose is to allow the pole plates that connect the power supply side cable and the plurality of terminal side power lines to be stacked in multiple stages via insulating members, and to Connections can be made by simply inserting cables, etc. into the pole plate horizontally from the outer circumferential side toward the center.
To provide a pole board for a centralized wiring connector having a configuration in which two or more power supply side cables can be connected to one pole board.

<Means for Solving the Problems> The configuration of the present invention for achieving the object will be explained using drawings corresponding to embodiments. A plurality of electrically conductive terminal fittings that hold the electrical wire so that they cannot be pulled out by a rotating blade that bites into the electrical wire are attached to an annular substrate made of an insulating material with a hole in the center with their respective inner ends close to each other. and at least one terminal assembly having a configuration such that the annular substrate has a contour shape to be fitted into the central hole, and an arbitrary combination of terminals located at the inner end of the terminal fitting on the outer peripheral surface thereof. a terminal connection body made of an insulating material and having at least two contacts that are electrically conductive at the terminal, and the direction of extension of the terminal fitting from the inner end to the outer end is parallel to the annular substrate. This configuration is characterized in that a wire insertion port included in a common plane and located at the outer end is open along the extension direction and in a direction opposite to the inner end.

One of the elements constituting the pole board according to the present invention, that is, the terminal assembly, has a structure in which a plurality of conductive terminal fittings are attached to an insulating annular substrate so as to be located substantially on the same plane. The direction of the wire insertion port facing outward along the extension direction is substantially included in the plane, and the rotary blade is pressed by a spring toward the wire receiving and supporting wall of the terminal fitting that forms this wire insertion port. This is a structure that is provided on the terminal fitting in such a manner that it cooperates with a band-like spring near the terminal fitting to allow the insertion of the electric wire but prevent its removal.

In order to stabilize the pressing of the wire against the wire receiving support wall, it is desirable that each terminal fitting is provided with one or more strip-shaped springs that cooperate with the rotary blade in addition to the rotary blade.

It is desirable that the rotary blade described above has a structure in which hard teeth that bite into the inserted electric wire are arranged in rows on a deformed arcuate surface centered on the pivot axis of the rotary blade.

Further, the other elements constituting the pole plate of the present invention, that is, the terminal connectors may or may not be provided with special fixing means to the insulating case housing them. An example of this fixing means is a hole formed in the center of the terminal connection body so as to be fitted onto a hollow post erected from the case.

In short, a terminal connector has a structure in which two or more contacts are insulated from each other in order to distinguish a plurality of terminals located at the inner end of a terminal fitting into at least two or more terminal groups that are electrically connected to each other. Must.

<Function> The pole board referred to in the present invention is an annular substrate with an insulating bottom surface of each terminal assembly, and the bottom surface of the central terminal connection body is also insulating except for the exposed contact area, so that the terminal assembly can be Insulation between each element is automatically achieved by simply stacking the required number of stages and inserting terminal connectors into the vertically aligned holes.

Since the insulating substrate also extends to the bottom surface of each terminal fitting that is housed in the protruding part of the insulating case, when a cover plate is placed on the terminal after a predetermined number of terminal assemblies are housed, Each terminal assembly and the central terminal connection body are fixed inside the insulating case so that they cannot swing and are insulated both from the outside and from each other.

The important point is that the connection state between the component terminal fittings in each terminal assembly can be arbitrarily changed by simply replacing the insulating terminal connectors as appropriate.

The centralized wiring connector assembled in this manner, for example, a three-layer terminal assembly type, is installed, for example, in the ceiling at a location where power line branching is required in the house. Then, the three single wires R, S, and T of the single-phase three-wire cable on the power supply side are inserted one wire at a time into each terminal assembly, and at the same time as they are inserted, they are automatically connected to each other by the terminal connection body. A strong connection to the terminal fittings on the terminal electrical equipment side of the first group is completed.

However, in the case of the pole board of the present invention, as mentioned above, one or more power supply side cables (2-wire type, 3-wire type,
(regardless of the wire type) can be connected to other terminal fittings in the same terminal assembly, so one connector can be used to branch in two or more ways.

In this state, the rotary blades are strongly biting into each of the single wires, and the strip spring presses the single wires R, S, and T with a uniform and constant force against the wire receiving and supporting wall of the terminal fitting. Therefore, once the cable is inserted, it is almost impossible to remove it.

On the other hand, regarding the two-wire power line on the power equipment side,
When the rated voltage is 100V, for example, the single wire R is inserted into the terminal assembly to which the single wire S is connected, and the single wire S is inserted into the terminal assembly to which the single wire S is connected, and similarly, a strong connection is made with one touch. Further, in the case of 200V, the terminal assembly of the single wire R and the terminal assembly of the single wire T are inserted and connected in the same way (when the single wire S is a neutral wire). The wire fixing action by the strip spring and the rotary blade is the same as that for the power supply cable, so it will not be described again.

After the initial branch setting is done in this way, if it becomes necessary to add a branch at a later date due to the addition of electrical equipment, etc., you can use the wire insertion port on the outer side of the connector without removing the connector cover in the same way as above. It is only necessary to insert additional wiring material or wires.

<Examples> Examples of the present invention will be described below based on the drawings.

In FIG. 1, a lower terminal assembly A1, a middle terminal assembly A2, and an upper terminal assembly A3 are of the same shape and size, and are attached to an annular substrate 1 made of an insulating material, such as heat-resistant plastic. , each having six conductive terminal fittings 3 attached radially from the central hole 2 at regular intervals and on the same horizontal plane.

As shown in FIG. 3, each terminal fitting 3 is fixed to the annular substrate 1 by rivets, spot welding W, or the like.

In the case of each terminal fitting 3, one side wall that defines a wire insertion opening 5a that opens outward on the same horizontal plane as the annular substrate belongs serves as a wire receiving and supporting wall 5b for the entire length of the fitting. It has been extended for.

Further, a side wall extending parallel to the support wall and integral with the support wall via the bottom 5c connects the bases of the strip springs 6a, 6b and the base of the coil spring 8 for biasing the rotary blade 7. Installed spring mounting wall 5
It is d.

A pivot 9 that supports the rotary blade 7 so as to be rotatable within a certain range is implanted in the bottom 5c on the side opposite to the coil spring 8 and closer to the wire insertion port 5a.

The strip springs 6a and 6b are curved so that their free ends are directed toward the inner end of the terminal fitting 3, that is, in a state that corresponds to the insertion direction of the electric wire, so that they do not interfere with the insertion of the electric wire, and once they are After insertion, apply sufficient pressing force to the wire.

On the side receiving the action of the coil spring 8, the surface of the rotary blade 7 facing the wire receiving support wall 5b is a partial arc deformed about the pivot 9, and hard teeth 7a carved here are inserted. It is meant to bite into electrical wires. When a pulling force is applied to the wire, it tries to bite into the wire more and more, but it cannot cut into the wire supported by the supporting wall 5b any further, and therefore,
This will prevent the wire from being pulled out.

Each terminal assembly A1, A configured in this way
The annular substrate 1 on which the terminal fittings 3, 3, . When the lowermost one A1 is first accommodated in the recess 10 of the same shape, the extension portion carrying the terminal fitting is also accommodated in the case extension portion 14 of the same shape in a tightly fitted state. .

Furthermore, after accommodating the middle stage terminal assembly A2 and the top stage terminal assembly A3, the terminal connecting body 4c is inserted into the holes 2, 2... of the annular bases 1, 1... whose positions are aligned.
is inserted. As a result, in the example shown in FIG. 1, the two terminal fittings on the front side have their inner end terminals 3a bent by leaf springs connected to the contact piece 4b on the front side, and the four terminal fittings on the back side are end terminal 3
a will be connected to the contact 4b on the back side.

Therefore, the two terminal fittings on the front side in this case function as mere "extension" connectors rather than branches, while the four terminal fittings on the back side connect three output branches from one input line. It functions as a connector that can be taken out.

Next, a cover plate 4d that completely covers these terminal assemblies and terminal connectors in a plan view and substantially seals the whole is placed thereon.

Central post 11 erected in the center of case 4a
is inserted into the center hole 4e of the terminal connection body, and the center hole 13 of the cover plate 4d is tightly fitted into the small diameter portion 11a at the top end thereof.

The connector thus assembled is in the state shown in FIG. 2, and is used by fixing it with bolts to a bracket screwed to a beam in the ceiling, for example, or by fixing the cover plate to the case with bolts and nuts.

To connect the power cable C to this connector,
After peeling off the outer coating and taking out the constituent single wires R, S, and T, and peeling off the coating of each wire, case 4
Three wire holes 16 are vertically arranged in the frame 15 on the outer surface of the overhanging portion 14 corresponding to each terminal fitting in a.
You only need to insert it into the

Although FIG. 2 shows an example in which the power line D on the terminal electrical equipment side is three wires r, s, and t, it is naturally possible to branch it to connect to any two poles on the power source side as described above.

Various modifications may be made to the embodiments described above within the scope of the utility model registration claims of the present invention.

In the example shown in Figure 4, two contacts 4 with equal arc lengths are used to divide the terminal fittings into two groups of three.
This example is the same as the above example except that b and 4b are provided.

In Fig. 5, the terminal fittings are also divided into two groups of three, but the contacts do not follow the circumferential surface of the terminal connection body, but are Y-shaped, which penetrate through it or are fixed to the surface layer. It is something. In this case, hole 4 above
Since the cover plate lacks e, it is necessary to fix both by a method other than the above, for example, by tightening the cover plate to the case at the overhanging portion.

In the example shown in FIG. 6, the terminal fittings are divided into three groups of two each, and the structure is such that three substantially linear contacts penetrate the terminal connecting body or are fixed to the surface layer.

Figure 7 has two arc-shaped contacts and one through contact, but the terminal fittings are divided into three groups of two, and the hole 4e mentioned above is missing. This is common to the example shown in FIG.

In addition to the above modifications, it goes without saying that in the configuration of the terminal assembly, the number of strip springs and the number of rotary blades included in one terminal fitting can be set to any appropriate number of one or more. be.

Further, the number of terminal fittings included in one terminal assembly is not limited to six as in the above example, but is completely arbitrary, and it is natural that the number can be 3 to 5 or 7 or more. Also, regarding the arrangement method, the outer circumferential line (envelope) formed by the electric wire insertion port may be any other shape such as an ellipse instead of a circle as described above. In that case, the terminal fittings may not be radial but may have a "ch" shape or the like. Alternatively, a metal fitting arrangement in which the outer circumferential line is rectangular can also be considered.

Finally, the number of terminal assemblies accommodated in one connector is not three as in the above example, but two for single-phase two-wire circuits, or six or eight as multiples of these. etc., and one connector has two
For example, it is possible to connect more than one power supply side cable and perform an extremely large number of circuit branches at one location.

<Effects of the Invention> As is already clear from the above description, according to the pole board of the centralized wiring connector of the present invention, the above-mentioned problems can be solved, and the following advantages can also be obtained.

That is, the complexity of incorporating a fairly complicated assembly of conductive members into a non-conductive material such as synthetic resin and integrally molding (insert molding) can be avoided. This is because, according to the present invention, a desired connector can be manufactured simply by preparing a large number of terminal assemblies and terminal connectors with the required configuration in advance and storing them in a matching case as needed. This is because it is extremely easy to manufacture (in addition to the two publications mentioned above, Utility Model Publication No. 54-25010, Special Publication No. 1983-
Both publications (No. 9402) propose connectors that require integral molding with inserts.

Another advantage of the present invention is that two connectors can be connected to one connector.
Since it is possible to input more than one power cable,
This makes it easier to meet diversified demands for branching work, and makes it possible to perform concentrated branching from one location.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of the present invention, Fig. 2 is a central vertical sectional view after assembly, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Figs. 4 to 7 are FIG. 6 is a plan view schematically showing main parts of a modified example. In the figure, A1 and A2 are terminal aggregates, 1 is a board, and 2
is a hole, 3 is a terminal fitting, 3a is a terminal, 4b is a contact, 4c is a terminal connection body, 5a is a wire insertion port, 6
Reference numerals a and 6b are band-shaped springs, and reference numeral 7 is a rotary blade.

Claims (1)

[Scope of utility model registration request] The strip springs 6a, 6b and the rotary blade 7 that bites into the electric wire hold the hole 2 in the center so that the plurality of conductive terminal fittings 3, which hold the electric wire so that they cannot be pulled out, have their respective inner ends close to each other. at least one terminal assembly A1, A2... configured to be attached to an annular substrate 1 made of an insulating material having a
It has a contour shape that fits into the central hole 2 of the annular substrate 1, and has at least one on its outer peripheral surface that electrically connects the terminals 3a located at the inner ends of the terminal fittings 3 in any combination. two contacts 4b,
4b and a terminal connector 4c made of an insulating material, the extension direction of the terminal fitting from the inner end to the outer end is included in a common plane parallel to the annular substrate 1, and the outer end Wire insertion port 5 located in the
A pole board of a centralized wiring connector, characterized in that a is opened along the extension direction and in a direction opposite to the inner end.