JPH0351895Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] The invention is a terminal block for flat electric wires.
A flat electric wire whose outer periphery is covered with an insulating coating is connected to other electric wires via terminal fittings at the end of the flat inner conductor, and multiple flat electric wires are pulled out in a stacked manner in the thickness direction. This invention relates to a terminal block for electric wires.

[Background Art] As shown in FIG. 9, a flat electric wire has a plurality of flat internal conductors 21 arranged in parallel at a distance from each other in the width direction, and the outer periphery of the internal conductor 21 is covered with an insulating coating 22 over the entire circumference. It is shaped like a flat sheet. A pair of adjacent internal conductors 21
Elongated holes 23 are formed in the insulating coating 22 at predetermined pitches in the longitudinal direction at both ends in the width direction.

However, when connecting another electric wire 5, such as a normal insulated electric wire, to the flat electric wire 2 formed in this way, a terminal fitting 1 is provided at the end of the flat electric wire 2, and a terminal fitting 1 is connected to the flat electric wire 2. The flat electric wire 2 and another electric wire 5 are electrically connected. As shown in FIG. 10, the terminal fitting 1 is a flat plate having a shape that can be folded in half. The shape is such that it can come into contact with both the front and back sides. A large number of contact claws 11c are provided on the surface of the terminal fitting 1 that comes into contact with the flat electric wire 2.
is cut and raised, and the terminal fitting 1 is connected to the flat wire 2.
By pressing into contact with the inner conductor 21, the contact claw 11c bites into the insulation coating 22 and is electrically connected to the internal conductor 21. The terminal fitting 1 is sandwiched between a base 3 made of an insulating material and a cover 4 to prevent the terminal fitting 1 from falling off the flat electric wire 2 and to prevent the terminal fitting 1 from being exposed to the outside. Provides insulation protection.

By the way, as shown in FIG. 11, the flat electric wire 2 wired through the underside of the flooring 8 is drawn into, for example, a cabinet 53 of a switchboard and connected to a breaker 52 etc. via the electric wire 5. If a large number of lines are connected to cabinet 5
You will be drawn into 3. When drawing a large number of lines into the cabinet 53 in this way, it is common practice to stack the flat wires 2 in the thickness direction. However, as mentioned above, since the board 3 and the cover 4 are required for one flat wire 2, there is a problem that the number of parts increases when a plurality of flat wires 2 are used. The thickness of the terminal block increases due to the overlapping of the cover 4, and if it is stacked in multiple stages, it will not fit inside the cabinet 53.
The terminal blocks are arranged at different positions in the longitudinal direction of the flat electric wire 2, so that the storage space for the terminal blocks in the longitudinal direction of the flat electric wire 2 is increased. Furthermore, since each terminal block is arranged offset in the longitudinal direction of the flat electric wire 2, in order to raise the terminal block from the flat electric wire 2 connected to other terminal blocks, as shown in FIG. , there is a problem that the mounting bracket 54 is required and the number of parts increases.

[Purpose of the invention] The present invention was made in view of the above points, and its main purpose is to develop a terminal block that is connected to flat electric wires that are wired in a layered manner in the thickness direction. The purpose is to reduce the number of constituent parts, and another purpose is to reduce the space occupied by a terminal block connected to a plurality of flat electric wires.

[Disclosure of the invention] (Example 1) As shown in FIG. 3, the terminal fitting 1 is formed into a substantially L-shape with a connecting piece 11b extending from one end of a wire holding piece 11a that can be folded into two. A terminal nut 1 includes a terminal plate 11, a terminal screw 12 inserted into a through hole 11d formed in a connecting piece 11b, and a screw hole 13a screwed into the tip of the terminal screw 12.
3, and a roof-shaped washer 14 sandwiched between the head of the terminal screw 12 and the connecting piece 11b,
A large number of contact claws 11c are cut and raised on the inner circumferential surface of the wire clamping piece 11a at a portion that comes into contact with the surface of the wire.

As shown in FIG. 4, the flat electric wire 2 includes a plurality of flat internal conductors 21 spaced apart in the width direction, and an insulating coating 22 covering the entire circumferential surface of the internal conductors 21.
The inner conductor 21 is covered with a flat sheet whose cross section is long in the direction in which the inner conductors 21 are arranged, and the insulating coating 22 is covered with the inner conductor 2 between a pair of adjacent inner conductors 21 and at both ends in the width direction.
A long elongated hole 23 is bored in the longitudinal direction. Wire clamping piece 11a in the terminal fitting 1
The width of the wire is approximately equal to the length of the long hole 23 of the flat electric wire 2, and when the wire holding piece 11a is inserted into the long hole 23 and folded in half, the contact claw 11c breaks the insulation coating 22. It is designed to come into electrical contact with the internal conductor 21 of the flat electric wire 2. The inner conductor 51 of the electric wire 5, such as a normal multicore insulated electric wire, is held between the connecting piece 11b and the washer 14, so that the flat electric wire 2 and the other electric wires 5 are connected electrically and mechanically. It is connected to the

The terminal fitting 1 is mounted on a flat electric wire 2 and is sandwiched between a base 3 and a cover 4 made of an insulating material. The base 3 and cover 4 are constructed as shown in FIG. That is, the base 3 is formed into an elongated flat plate shape, and a terminal receiving groove 31 is formed in the upper part of the surface of the base 3 in FIG. 1 at a position corresponding to the terminal screw 12 of the terminal fitting 1. The terminal receiving grooves 31 are formed according to the number of internal conductors 21 of the flat electric wire 2, and are formed at three locations in FIG. 1. A notch 32 is formed on the upper surface of the base 3 at a position corresponding to each terminal receiving groove 31 . At both ends of the base 3 in the longitudinal direction, coupling grooves 34 with mounting holes 33 formed in the bottom are recessed in the upper part of the surface, and at both ends of the base 3 in the longitudinal direction. A pair of positioning protrusions 35 are provided protruding from the lower part of the back surface. Further, coupling grooves 36 are formed in the lower part of the surface at both longitudinal ends of the base 3. On the other hand, the cover 4 is formed into an elongated flat plate, and is formed in the same shape as the upper part of the base 3. That is, notches 41 are formed at three locations on the top surface in FIG. 1, and coupling grooves 42 without attachment holes are formed at both ends of the surface of the cover 4 in the longitudinal direction. A positioning recess (not shown) is formed on the back surface of the cover 3 to correspond to the positioning projection 35 of the base 3, and when the cover 4 is attached to the surface of the base 3, the positioning recess 35 and the positioning recess are formed. The base 3 and the cover 4 are positioned by fitting into the recesses. A positioning recess is also formed on the back surface of the base 3. When the base 3 and the cover 4 are positioned, the coupling groove 36 of the base 3 corresponds to the coupling groove 42 of the cover 4, and the spring clip 6 formed in a substantially U shape is inserted into the coupling grooves 36, 42. By mounting the base 3 and the cover 4 so as to straddle them, and holding the base 3 and the cover 4 between the legs of the spring clip 6, the structure shown in FIG.
As shown in FIG. 2, the base 3 and the cover 4 are joined together. By connecting the base 3 and the cover 4 in this way, the lower part of the base 3 is covered by the cover 4, and the terminal screw 12 is exposed in the notch 41 formed on the upper surface of the cover 4. . Then, the insulated wire 5 can be connected to the terminal screw 12. Since the wire clamping piece 11a of the terminal fitting 1 is sandwiched between the base 3 and the cover 4 when the cover 4 is connected to the base 3, the wire clamping piece 11a does not open and the terminal fitting 1 This prevents the wire from falling off the flat wire 2. Also,
Since most of the terminal fitting 1 is covered between the base 3 and the cover 4, which are made of insulating material, and only the terminal screw 12 is exposed to the outside, the terminal fitting 1 is protected by insulation. .

By the way, when a plurality of flat wires 2 are laminated in the thickness direction, as shown in FIG. 2b,
Only the base 3 needs to be added. In other words, cover 4
The lower part of another base 3 formed in the same shape is placed on the back surface of the base 3 to which the terminal metal fitting 1 is attached, and the flat electric wire 2 to which the terminal fitting 1 is attached is sandwiched between both bases 3. It is. Here, when joining both bases 3, positioning protrusions formed on the surface of the newly added base 3 are inserted into positioning recesses (not shown) formed on the back surface of the original base 3. It is sufficient to fit the spring clips 35 and attach the spring clips 6 spanning the coupling grooves 34 and 36 of both bases 3. Base 3
Since a notch 32 similar to that of the cover 4 is formed on the top surface, the terminal screw 12 of the terminal fitting 1 sandwiched between both bases 3 can be exposed from the notch 32. The configuration can be the same as when the cover 4 is combined with the base 3. That is, the base 3 of the same shape is connected to the flat wire 2.
The wire clamping piece 11a is sandwiched between both bases 3 in a manner that is shifted in the longitudinal direction, and the connecting piece 11b is exposed at the stepped portion formed by both bases 3. In order to fix this terminal block to a mounting surface such as a cabinet, a mounting screw inserted through the mounting hole 33 of the base 3 may be used.

However, when one flat electric wire 2 is added, the thickness increases by an amount equivalent to the thickness of the base 3, and since there is no need to separately add a cover as in the conventional case, the thickness can be reduced. Further, since the flat electric wire 2 only needs to be extended by about half the width of the base 3 in the longitudinal direction, the length of the flat electric wire 2 can also be reduced in the longitudinal direction compared to the conventional one. Therefore, if the terminal block to which a plurality of flat electric wires 2 are connected as described above is housed in a cabinet 53 of a switchboard housing a breaker 52, etc., as shown in FIG. This saves space in both the thickness direction and the longitudinal direction of the cabinet 53, and the cabinet 53 can be made smaller.

(Example 2) In Example 1, a spring clip 6 was used to connect the base 3 and the cover 4, or the bases 3 to each other, but in this example, as shown in FIG.
Here is an example of combining using . Here, the terminal fitting 1 is formed in a shape in which a wire clamping piece 11a is integrally provided with a crimp terminal portion 11e, and the crimp terminal portion 11e is wound around the inner conductor 51 of the insulated wire 5. It is designed to be crimped onto the A shallow holding groove 37 that is open to the front and the bottom in FIG. 6 is formed on the surface side of the base 3, and the flat electric wire 2 is housed in this holding groove 37. The depth of the holding groove 37 in the front and back directions of the base 3 is set to a thickness such that the wire clamping piece 11a of the terminal fitting 1 is attached to the flat electric wire 2. A through hole 38 is formed in the upper part of both longitudinal ends of the base 2, and a screw hole 39 is formed in the lower part thereof. Further, the cover 4 has a vertical width that is large enough to cover the lower half of the base 3, and has through holes 43 formed at both ends in the longitudinal direction.

Therefore, the flat electric wire 2 to which the terminal fitting 1 is attached
Fit the end of the screw 7 into the holding groove 37 of the base 3, fit the cover 4 onto the base 3, and insert the screw 7 into the through hole 43 of the cover 4.
The base 3 and the cover 4 are connected by the screws 7 by screwing them into the screw holes 39 of the base 3 through the screws 7. Moreover, if the base 3 is stacked on the back side of the base 3 and the screw 7 is screwed into the screw hole 39 of the base 3 disposed later through the through hole 38 of the base 3 disposed before, Both bases 3 can be joined in such a manner that the upper part of the base 3 disposed later protrudes from the upper end of the base 3 disposed before. When the base 3 and the cover 4 or the bases 3 are connected together in this way, the crimp terminal portion 11e of the terminal fitting 1 is exposed to the outside, as shown in FIG. 1 to which the internal conductor 51 of another electric wire 5 is connected.

As described above, when adding flat electric wires 2, it is only necessary to add the base 3, and there is no need to add a cover or use mounting brackets, so multiple flat electric wires 2 can be added. When used, the number of parts is reduced compared to the conventional method, and the space occupied in the thickness direction and longitudinal direction of the flat electric wire 2 is reduced.

In the above two embodiments, one base 3 has a cover 4.
However, since the bases 3 can be connected to each other, the base 3 may be used in place of the cover 4, as shown in FIG. In this case, since the cover 4 is not required, the number of parts can be further reduced, mold costs can be reduced, and parts management can be facilitated.

[Effects of the invention] As described above, the present invention has a terminal fitting that integrally includes a wire clamping piece that overlaps the insulation coating and a connecting part that protrudes from the edge of the flat wire and is connected to an external wire. The piece has a protruding contact claw that bites into the insulation coating and is electrically connected to the internal conductor. Since the wire clamping piece is held between the two bases and the connection part is exposed on the staircase formed by both bases, the terminal metal fitting placed at the end of the flat wire between the pair of bases of the same shape is By sandwiching the bases, it is possible to stack the bases one after another to form a terminal block, and when adding flat wires when wiring flat wires in the thickness direction, it is possible to stack the bases one after another to form a terminal block. Since only the base needs to be added, it has the advantage that the number of components can be reduced compared to the conventional terminal block, which requires adding a base and a cover for each flat electric wire. In other words, since the bases are stacked so as to be shifted in the longitudinal direction of the flat wires, no matter how many flat wires are stacked, it is only necessary to add bases of the same shape. It becomes less. Moreover, since the wire clamping piece is held between the pair of bases, the terminal fitting and the flat electric wire are in close contact with each other, and the electrical connection state is stabilized. In addition, there are fewer components, and the thickness of the terminal block increases by only the thickness of the base in the thickness direction of one flat wire, so it occupies less space than conventional products. It has advantages.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing Embodiment 1 of the present invention;
Figures 2a and b are cross-sectional views showing usage examples of the same as above, Figure 3 is an exploded perspective view showing the terminal fittings used in the above, and Figure 4 shows how to connect the terminal fittings to the flat electric wire in the same as above. 5 is a schematic configuration diagram showing a switchboard using the same as above, FIG. 6 is an exploded perspective view showing Embodiment 2 of the present invention, FIG. 7 is a sectional view of the same, and FIG. 9 is an exploded perspective view showing a conventional example, FIG. 10 is an exploded perspective view showing a method of connecting the terminal fitting to a flat electric wire in the same manner as above, and FIG. It is a schematic block diagram showing a switchboard. 1 is a terminal fitting, 2 is a flat electric wire, 3 is a base, 4 is a cover, 11a is a wire clamping piece, 11b is a connecting piece,
11c is a contact claw.

Claims (1)

[Scope of utility model registration request] A flat electric wire in which the outer periphery of the flat internal conductor is covered with an insulating coating, and the end of the flat electric wire is connected to another electric wire via a terminal fitting, and multiple flat electric wires are pulled out in the form of overlapping each other in the thickness direction. In the terminal block, the terminal fitting integrally includes a wire clamping piece that overlaps the insulation coating and a connecting part that protrudes from the edge of the flat wire and is connected to another wire, and the wire clamping piece has a wire clamping piece that overlaps the insulation coating. A wire clamping piece is sandwiched between a pair of bases that are formed in the same shape and are shifted in the longitudinal direction of the flat wire, and a contact claw that bites in and is electrically connected to the internal conductor is provided protrudingly. A terminal block for flat electric wires, in which a connecting part is exposed at a staircase part formed by both bases.