JP3156041B2 - connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single energizing line which is generally used as a power line, which is insulated and covered.
A two-core or three-core VVF cable in which three or three wires are arranged in parallel and the outer periphery of which is covered with an outer cover is targeted, and another VVF cable is used at the time of wiring such a VVF cable or at the existing wiring already wired. To obtain a branch line by connecting
The present invention relates to a connector suitable for connecting and branching a current-carrying line on a positive electrode side of an existing wiring and a current-carrying line on a positive electrode side of a branch line without error.

[0002]

2. Description of the Related Art Conventionally, it is often necessary to obtain a branch line by connecting another two-core or three-core VVF cable to such a two-core or three-core VVF cable. In this case, since it is necessary to distinguish the positive side and the negative side of the core wire when energizing various devices, VVF is generally used.
The color of the interior coating of the cable is a different color that is easy to identify. For example, in a two-core VVF cable, the core wire is formed in two colors, white and black.
Many are formed in three colors of red, white and black.
When a branch line is taken out from the main line, core lines of the same color having the same polarity as the main line and the branch line are connected to each other.

[0003] In such a branch line removal work, when the main line is a branch line, after turning off the power to eliminate the danger, generally, as shown in FIG. First, the VVF cable 3 on the main line side is cut at a required place, the respective outer coverings 31 are removed, the covering wires on the positive and negative sides are respectively taken out, and the inner coverings 32 are further removed to remove the core coverings. Expose 33. Similarly, for the VVF cable 3 ′ on the branch side,
1 and the inner cover 32 on the positive electrode side and the negative electrode side are respectively removed to expose the core wire 33, and then the positive electrode side core wire 3 of the main wire is removed.
3 and the positive-side core wire 33 of the branch wire are put together, inserted into the metal sleeve 6 provided inside the closed-end insulating cap 61, and pressurized from above by a press tool to deform the metal sleeve 6 under pressure. Then, the core wires on the negative electrode side were connected to each other in the same manner.

[0004]

In such a means,
If the main line, which is the branch line, is a branch line, the power must be turned off before the branching work because of the necessity of electric shock prevention. Since it is very troublesome, there is a problem that the construction time is long and the working efficiency is poor.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a connector capable of safely and quickly branching an electric wire without stripping the inner and outer coatings of a VVF cable as described above. Things.

[0006]

In order to achieve the above object, the present invention takes the following measures. That is, the connector of the present invention is a connector used for connecting and branching a 2-core or 3-core VVF cable 3 ′ for branching from the 2-core or 3-core VVF cable 3, and is a highly conductive metal. And two or three contacts 1 made of a plate, and a main body 2 made of synthetic resin having a high insulating property.
However, the cross-sectional shape viewed from the side is a substantially inverted U-shape, and the two VVF cables 3, 3 'are respectively attached to the parallel pieces 1a, 1a.
Are cut at predetermined intervals D so as to cut the insulating outer skin 31 and the insulating inner skin 32 of the cable and contact the current-carrying wires 33, 33 having the same polarity of each cable. Cutting blades 13, 13 for cutting the insulating outer skin 31, entering between the adjacent insulating inner skins 32, and dividing each of them into right and left are formed at the middle and one end of the two parallel pieces 1 a, 1 a. The main body 2 is formed at the lower end of a bent piece 14a bent inward at a right angle from the main pieces 2a.
Is provided with two parallel grooves 21 and 22 formed at a predetermined interval E and through which are inserted, and is formed by two half-shaped main body components 2a and 2a formed to be fittable with each other. A plurality of insertion holes 23 into which the contacts 1 are inserted are provided in one of the main body components 2a, and the width of the two grooves 21 and 22 corresponds to the length of the conducting wire 33 of the two VVF cables 3 and 3 '. The width W is formed to be substantially the same as the width W on the large diameter side arranged side by side, and the space E between these two grooves 21 and 22 and the space D between the two cut portions 11 and 11 of the contact 1 substantially match. And the insertion holes 23 are VVF
In this configuration, the positions of the energizing wires 33 in the cable are shifted by the horizontal pitch.

[0007]

The two grooves 21 and 22 are formed so as to penetrate the entire width of the main body components 2a and 2b, respectively. Each of the cables 3 ′ protruding on both sides may be used as a branch line to obtain two branch lines. The groove 22 for inserting the VVF cable 3 ′ on the branch side is formed with a shielding wall 28 at one end side. In this case, the cut end of the VVF cable 3 'on the branch side can be applied to the shielding wall 28 and protruded only in one direction, so that only one branch line can be obtained.

The contact 1 is made of a material having higher hardness and higher conductivity than soft copper used for the current-carrying wire of the VVF cable 3, such as a hard copper alloy plate having high hardness. preferable. The cut interval (slit interval) of the cut portion 11 of the contact is
Is pressed against the VVF cable 3,
Coating outer sheath (outer sheath) 31 of cable in cooperation with cutting blade 13
And the inner coating (endothelium) 32, and the cut portion 11
The width is slightly smaller than the thickness of the energizing line 33 because the energizing line 33 is energized with the energizing line 33 on the opposite inner surface. In this manner, it is preferable that the energizing wire 33 be firmly pressed and clamped from both sides while plastically deforming the energizing wire 33 by the pressing force during the energizing operation.

Further, the thickness (plate thickness) of the contact 1 and the interval between the cuts 11 are set so that the contact area is equal to or larger than the cross-sectional area of the conducting wire 33 in the state of contact with the conducting wire 33. It is good to keep.

[0011]

1 to 8 show an embodiment of a connector according to the present invention for a three-core VVF cable. Reference numeral 1 denotes a contact. The contact 1 is a substantially inverted U-shaped side view formed by press-molding a brass plate having high electrical conductivity and a hardness higher than the hardness of the three-core VVF cable 3, 3 'to be used.
a, 1a, the two cutouts 11, 11 which cut the insulating sheath 31 and the insulating inner skin 32 of the two VVF cables 3, 3 'and insert and contact one of the conducting wires 33 in the cable have a predetermined distance D. And a concave portion 12 for separating the cut portions 11 is provided at an intermediate portion. Further, the cutting blades 13, 13 for cutting the cable through the insulating outer cover 31, entering between the adjacent insulating inner coats 32, and dividing the cables into right and left parts are provided with two pieces 1 a, 1 a near the two cut parts 11, 11. Are formed along the direction connecting. The lower ends of the cut portions 11, 11 are formed in a V-shape like a blade, and the cutting blade cuts the outer skin 31 and inner skin 32 of the VVF cable 3, 3 ',
The current reaches the inner conducting wire 33, and the conducting wire 33 is sandwiched while being deformed by press contact from both sides. Further, a bent piece 14a bent inward at a right angle at the middle of the parallel pieces 1a, 1a and a bent piece 14b bent at a right angle outward at one end of the parallel pieces 1a, 1a, respectively. The cutting blades 13 are provided at the lower ends of the bent pieces. The other ends of the parallel pieces 1a, 1a are bent outward to form ear pieces 15.
The cut portions 11, 11 are formed so as to be slightly inclined upward so as to press in a direction in which a current-carrying wire to be connected in the cable is separated from other current-carrying wires when pushed into the cable. The contact 1 has an insulating resin plate 16 adhered to the upper surface of the connection bottom portion 12.

The thickness of the contact 1 and the notch 1
The width of 1 is set by calculation such that the area of the portion in contact with the energizing wires 3 and 3 ′ by pressure welding is substantially equal to or larger than the cross-sectional area of the energizing wire. Now, looking at two types of diameters of the conducting wire to be used, 1.6 mm and 2.0 mm, when the conducting wire diameter is 1.6 mm, the contact 1
Is 0.5 mm, the width of the cut portion 11 may be about 1.2 mm. If the thickness of the contact 1 is 0.6 mm when the diameter of the conducting wire is 2.0 mm, the width of the cut portion 11 may be about 1.5 mm.

The connector body 2 is integrally formed of a resin material such as nylon, polyethylene or polypropylene. The connector main body 2 is composed of two main body components 2a and 2b of substantially the same shape and a half body, and a cover body 26. Each of the main body components 2a and 2b is provided on the branch line side (branched side). Two grooves 21 and 22 for inserting and fitting the VVF cable 3 and the branching VVF cable 3 ′ are formed in parallel at a predetermined interval E. One main body 2a is provided with three insertion holes 23 for inserting the contacts 1 respectively, and is connected to the other body 2b by a foldable portion 24 on one side so as to be freely foldable. These main body components 2a, 2b are structured so as to be fitted to each other at the free end side through an engagement piece 20b and an engagement hole 20a. Further, the cover body 26 is extended outside on an extension line along the groove direction of the main body structure 2a through a flexible connecting band 25 and is foldably connected to a contact insertion surface of the main body structure 2a. ing. The cover body 26 is provided with engaging claws 27 that engage with engaging holes 27a provided on the side surface of the main body component 2a. Further, a hook portion 35 for hooking the connector is provided on the main body 2b.

The widths of the grooves 21 and 22 are the same as those of the three cores VV.
Large diameter (wide side) with F cable 3, 3 'conducting wires arranged side by side
Are formed to have widths substantially equal to the width W of each of the two main body components 2.
a, 2b Groove 2 in Folding Position with Fit
The opposing widths (the sum of the depths of the opposing grooves) between 1, 21, 22, and 22 are almost the same as the width w on the narrow side of each VVF cable 3, 3 ', and the cables are sandwiched without gaps. It is formed to a width that can be used. The space between these two grooves 21 and 22, that is, the space E between the center lines,
Are formed at intervals between the two cut portions 11 of the contact 1, that is, at intervals substantially matching the interval D between the center lines. Also, three insertion holes 2 for inserting the contacts 1
3 have a shape along the plane shape of the contact 1 as shown in FIGS. 1 and 4, and have a size suitable for inserting and temporarily holding the lower half of the contact 1. It is. That is, a rectangular hole 23a into which the main body of the contact is inserted and an ear hole 23b into which the bent piece 14b and the ear 15 are inserted at both ends are provided. The three insertion holes 23 are formed so as to be shifted from each other in the width direction of the groove by an interval of the horizontal pitch of the three conducting wires 33 in the VVF cable.

The folded portion 24 of the two main body components 2a and 2b is formed in a W-shape when viewed from the side, and the lower bottom portion thereof is formed thin. Thus, contact 1 is shown in FIG.
As can be seen in FIG.
And temporarily held in the respective insertion holes 23, 23.

The connector in this embodiment is a
A connector for obtaining only one branch line from the VF cable 3, wherein the configuration is such that a shielding wall for closing the groove at one end of the grooves 22, 22 on the side through which the branch-side VVF cable 3 ′ is inserted. 28, 28, and the VV on the branch side
The cut end of the F cable 3 'is applied to the shielding wall 28 so that it can protrude only in one direction. After the connector is attached to the cable 3 on the branch line as described above, the cable 3 'on the branch side is
The tip is a shield wall 2 from the opening made to the side by
By pushing in until it comes into contact with 8, the two cables 3, 3 'can be inserted into the connector in parallel.

In order to branch an electric wire using the connector constructed as described above, the three-core VVF cable 3 on the wired side (branch line side / branched line side) is kept covered with the cable as shown in FIG.
As shown in FIG. 3, one of the main bodies 2a and 2b (here, 2b) is inserted into the groove 21 so that the cross section is in the horizontal posture, and the three cores for branching are inserted into the adjacent groove 22. The line on the positive or negative side of the VVF cable 3 ′, which has been confirmed by the cut end face, is selected in a direction that matches the positive or negative line on the main line side, and the cut end face is connected to the shielding plate 2.
4, and then, as shown in FIG. 4, the other component (here, 2 a) is folded from the folded portion 24, placed over it and pressed, and engaged with the engaging claw piece 20 b on the other side. The insertion holes 20a are fitted to each other.
In this structure fitting state, the branch line side cable 3 ′
May be inserted through the opening.

Next, as shown in FIG.
Is pressed by a suitable pressing tool A so that the entire contact 1 is buried in the contact insertion hole 23 as shown in FIG. 6, and finally, as shown in FIG. 25, the outer surface of the contact 1 is covered, and the engaging claws 27 formed at the respective corners are engaged and connected to the engaging holes 27a formed in the main body constituting body 2a.

As shown in FIG. 8, the pressurized contact 1 cuts the outer skin 31 and inner skin 32 of the cables 3 and 3 'inside the connector body 2 and supplies the current-carrying wires 33 and 33 on the same pole side of both cables. Electrical contact with the cutting blade 1
By 3, the cable is divided right and left from between the current-carrying wire contacting the contact 1 and the other two current-carrying wires. At this time,
Each of the cuts 11, 11 is a respective cable 3,
The 3 ′ left and right energizing lines 33 are formed so as to be inclined in a direction that separates the left and right energizing lines. The safety can be improved by separating the energizing wire from the left and right. In this way, the branch line is branched from the existing wiring or the main line. Also, one of the cover members 2
The hook body 35 provided on the connector 6 allows the connector together with the cables 3 and 3 to be hung on a building or a building, which is convenient.

Since the three insertion holes 23 are formed so as to be shifted laterally by an interval of the horizontal pitch of the three conducting wires 33 in the VVF cable, the respective insertion holes 2 are formed.
3 can connect the same-polarity conducting wires of the left and right three-core VVF cables.

A bent piece 14b bent outwardly at right angles and an ear piece 15 are formed at the end of the contact 1, and three insertion holes 23 for inserting the contact 1 of the main body 2 are formed.
Are formed along the plane shape of the contact, so that the contact 1 can be stably temporarily held when the contact 1 is inserted into the insertion hole 23 of the main body, and can be smoothly pressed as a guide during press-fitting. In addition, by providing one of the cutting blades 13 on the bent piece 14b bent outward, the effective length of the cutting blade can be set longer, thereby cutting the insulating sheath of the cable. This can further promote the effect of separating adjacent left and right conducting wires.

In the present invention, the inverted U-shaped contact 1 can also be manufactured by coating a metal plate of a material for forming a contact with an insulating layer in advance, and then molding it into a predetermined shape. . The metal plate used as a material is the VVF cable 3, 3 ′.
Any material may be used as long as it is higher in hardness and relatively lower in electric resistance than the current-carrying wire, that is, a material excellent in conductivity, and may be a material other than a copper alloy plate.

In the above embodiment, the connector used for the three-core VVF cable has been described. However, the number of the connector 1 of the main body and the number of the contact insertion holes 23 of the main body are set to two to constitute a connector for the two-core VVF cable. It is also possible. In this case, it is needless to say that other configurations are the same as those in the above-described embodiment.

In the above embodiment, the bent piece 14 on the side end side is used.
b is bent outward at right angles from the parallel pieces 1a, 1a, but may be bent inward at right angles as shown in FIG. In this case, the ear piece 15 shown in the above embodiment is omitted.

Although the embodiments and modifications that are considered to be representative of the present invention have been described above, the invention is not necessarily limited to the structures of these embodiments and modifications. For example, in the above embodiment, the half-shaped components 2a and 2b of the main body 1 are integrally connected so as to be foldable by the folding portion 24. However, each of the components 2a and 2b is formed separately. Of course, it is also possible to configure so as to fit and connect with each other. In addition, the present invention has the above constitutional requirements, achieves the object of the present invention, and can be appropriately modified and implemented within a range having the following effects.

[0026]

Since the present invention is constructed as described above, it is possible to cut off the electric current even if the branch line is a bundled line, by simply pressing the contact into the 3-core VVF cable. And the special structure of the notch of the contact allows the left and right conducting wires with different poles in the same cable to be separated from each other to improve safety. Since the body has a simple structure of an integrally molded product, it can be provided at low cost.

[0027]

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a connector according to the present invention, and is an entire perspective view of a back side of a main body before a contact is inserted.

FIG. 2 is a perspective view of the inner surface side of the main body of FIG. 1 with a three-core VVF cable inserted into a groove.

FIG. 3 is an enlarged perspective view of a contact according to the present invention.

FIG. 4 is a perspective view of the rear surface of the main body, showing a state where only the tip portion of the contact is temporarily inserted.

FIG. 5 is a perspective view showing a process of press-fitting a contact with a press-fitting tool in a state where the left and right main body components are folded and the cable is fitted.

FIG. 6 is a perspective view showing a state where a contact is press-fitted.

FIG. 7 is a perspective view showing a state in which a cable is completed with the cover body covered.

FIG. 8 is an enlarged sectional view showing a contact insertion state.

FIG. 9 is a perspective view showing another embodiment of the present invention.

FIG. 10 is a perspective view showing an example of a conventional means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact 11 Cut part 13 Cutting blade 14 Bending piece 2 Main body 2a Main body structure 2b Main body structure 20a Fitting part 20b Fitting part 21 Groove 22 Groove 23 Contact insertion hole 3 Hot-side VVF cable 3 'Branch-side VVF cable Reference Signs List 31 Insulation outer skin 32 Insulation endothelium 33 Conducting wire D Notch spacing E Groove spacing W Width of parallel conducting wire w Width of narrow conducting wire

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeshi Kagida 1-3-5, Tsurumi, Tsurumi-ku, Osaka-shi Nichifu Terminal Industry Co., Ltd. (56) References JP-A 7-130409 (JP, A) Akira Mikai 56-44472 (JP, U)

Claims (1)

(57) [Claims] 1. A connector used for connecting and branching a 2-core or 3-core VVF cable (3 ') for branching from a 2-core or 3-core VVF cable (3), wherein the metal plate is rich in electrical conductivity. , And a main body (2) made of a synthetic resin rich in insulation, and the contact (1) has a substantially inverted U-shaped cross-sectional shape viewed from the side, Connect the two VVF cables to the two parallel pieces (1a) and (1a).
(3) and (3 ') cut the insulating sheath (31) and the insulating inner sheath (32), and cut into two notches (11) that respectively contact the conducting wires (33) and (33) to be connected to each cable. ) And (11) are formed at a predetermined interval (D), and cut the insulation sheath (31) of the cable and enter between the adjacent insulation inner sheaths (32) and (32) to divide them into right and left. The cutting blades (13), (13) that make up the two parallel pieces (1a),
At the middle part and one end of (1a), the parallel pieces (1a) and (1a) are formed at the lower ends of bent pieces (14a) which are bent inward at right angles from each other, and the main body (2) is Both VVF cables (3),
(3 ') is provided with two parallel grooves (21) and (22) formed at a predetermined interval (E) through which two grooves are formed, and two halves are formed so as to be fittable with each other. One of the main body components (2a) is composed of the main body components (2a) and (2b).
A plurality of insertion holes (23) for inserting (1) are provided, and the width of the two grooves (21) and (22) is equal to the width of the two VVF cables.
The widths (W) of the large diameter side where the conducting wires (33) of (3) and (3 ′) are arranged side by side are formed to be approximately the same width, respectively, and the distance between these two grooves (21) and (22) ( E) and two notches (11), (1) of the contact (1).
The insertion hole (23) is formed in the width direction of the groove by the distance of the horizontal pitch of each conducting wire (33) in the VVF cable. A connector that is staggered.