JP2840826B2 - Watertight 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 method of disposing two insulated single energizing wires (single wires, which are not stranded fine wires), which are generally used as power lines, and arranging them in parallel. For VVF cables further insulated
A watertight connector used when wiring such a two-wire VVF cable or when connecting another VVF cable to an already-wired existing wiring to obtain a branch line, wherein the branch part maintains a watertight state. About.

[0002]

2. Description of the Related Art It is often necessary to connect such a VVF cable to another VVF cable to obtain a branch line. In the case of such branch wiring, when the main line is a consolidation line, after turning off the power to eliminate the danger, generally, as shown in FIG. Then, the respective outer coatings 31 are removed to take out the positive-electrode-side coating wire and the negative-electrode-side coating wire, respectively. Further, the respective inner coatings 32 are removed to expose the conducting wires 33. Similarly, for the VVF cable 3 ′ on the branch side, the outer covering 31 and the inner covering 32 on the positive electrode side and the negative electrode side are removed to expose the energizing line 33, and the energizing line 33 on the main live line and the branch side are connected. Are inserted into the metal sleeve 5 provided inside the closed end insulating cap 51, and the metal sleeve 5 is pressurized and deformed under pressure by a pressing tool from above. I was connected.

As another means, a VVF cable is taken out of the energizing line as described above, these are divided into a positive electrode side and a negative electrode side, respectively, and the energizing lines are twisted and connected with a tool. Alternatively, a method has also been used in which a copper sleeve is placed on them and crimped and connected, and an insulating tape is wound around each surface to cover them.

[0004]

However, in these conventional means, the outer conductor and inner skin of the VVF cable must be removed to expose the energizing wires, and then the electrical connection between the energizing wires must be performed. In the case of wires, it is necessary to stop the power supply before the branching work because of the necessity of electric shock prevention, and during that time a power outage state is inevitable, and the work is very troublesome Therefore, there is a problem that the construction time is long and the work efficiency is poor, and it is difficult to maintain the watertight state, and there is a risk of electric leakage in various construction sites and outdoor construction sites. .

[0005] Therefore, in order to fundamentally solve the above-mentioned conventional problems, the present invention omits the VVF cable branch connection work without performing the complicated work of removing the insulation coating. It is an object of the present invention to provide a watertight connector that can safely and easily perform a branch connection operation of an electric wire in a short time by eliminating a risk of electric leakage or a risk of an electric shock accident.

[0006]

The structure of the watertight connector according to the present invention, which has been adopted to achieve the object, will be described with reference to the reference numerals used in the description of the embodiments.
A connector for branch-connecting a two-core VVF cable 3 'for branching from a core VVF cable 3; a contact 1 made of a highly conductive metal plate; a main body 2 made of a synthetic resin rich in insulation; 4, the contact 1 cuts the insulating outer skin 31 and the insulating inner skin 32 of the two VVF cables 3 and 3 ', and makes two cuts 11 and 11 which are in electrical contact with the internal conducting wire 33 at a predetermined distance D. The main body 2 has two parallel grooves 21 and 22 formed at a predetermined interval E for inserting the two VVF cables 3 and 3 ′ therethrough, and an insertion hole for the contact 1. 23 and two half-structured main body components 2a, 2b each having a relative fitting fixing portion 24, 20.
2 are formed to have substantially the same width as the width w on the narrow side of the two VVF cables 3 and 3 '.
b Grooves 21, 21, 22, 22, in a folded position
22 are formed so as to have substantially the same width as the width W of the two VVF cables 3 and 3 ′ on the side of the conducting wires in parallel, and the distance E between the two grooves 21 and 22 and the contact 1 The outer cover 4 is formed at an interval substantially equal to the interval D between the two cuts 11, 11. The outer cover 4 is provided with a small hole 43 for injecting a watertight hardener in a part of the peripheral wall. It has a slightly larger space, and has a structure that covers the entire peripheral surface of the main body 2 with a space 42 for watertight sealing between the main body 2 and the main body 2.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In implementing a watertight connector having such a structure, it is assumed that the two grooves 21, 22 extend through the entire width of the main body components 2a, 2b, respectively. Of the VVF cable 3 ′ protruding from the insertion groove 22 on both sides, the cables 3 ′ protruding on both sides are respectively used as branch lines.
A groove 22 for inserting the VVF cable 3 ′ on the branch side may be provided on one end side of the shielding wall 28.
And the VVF cable 3 'on the branch side.
By contacting the cut end of this with the shielding wall 28 and protruding only in one direction, it is possible to obtain a configuration in which only one branch line is obtained.

In forming the watertightly closed space 42 in the cover 4, a plurality of interval forming projections 41 are formed on the inner peripheral surface of the cover 4 or the outer peripheral surface of the connector body 2. And a space 42 for hermetic sealing between the connector body 2 and the space 42 through the space forming protrusion 41.
By injecting a liquid watertight curing agent into the watertight sealing space 42 from the small hole 43 and curing it, the branch connection portion of the electric wire can be maintained in a watertight state. .

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. This contact 1 is used to connect one line, for example, the line on the positive electrode side.
It is not limited to one flat plate, and two or more sheets may be used. Also, it is not limited to only a flat plate, for example, a U-shape in side view or It may be bent into a U-shape. In short, it suffices that two notches 11, 11 that are in electrical contact with the conducting wire 33 are formed at two places on the flat plate portion at an interval D corresponding to the interval between the two VVF cables. .

The cut interval (slit interval) of the cut portion 11 is determined by pressing the contact 1 against the VVF cable 3 so that the outer coating (outer skin) 31 and the inner coating (endothelium) 32 of the cable are torn. Since the energization line 33 is energized on the inner surface facing the portion 11, the width is preferably slightly smaller than the thickness of the energization line 33. 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 such 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. Needless to say, when two or more contacts 1 are used to connect one of the wires, the sum of the contact areas of all the used sheets should be equal to or larger than the cross-sectional area of the conducting wire 33. By doing so, the electrical resistance of the contact portion between the contact 1 and the conducting wire 33 can be kept low, accidents such as heat generation can be prevented, and a connector that can be used safely can be obtained. it can.

[0012]

1 to 8 show a first embodiment of a watertight connector according to the present invention. FIG. 1 shows the relationship between a state in which a cable is attached to a connector body and a watertight cover. FIG. 2 is an explanatory view showing the inner shape of the connector main body and the VVF cable, FIG. 3 is a perspective view showing the outer shape of the connector main body and the contacts, and FIG. 4 is the outer surface showing a state where the contacts are mounted. 5 is a perspective view showing a state where a cable is inserted into the connector main body, FIG. 6 is a perspective view showing a state where the connector main body is relatively fitted, and FIG. 7 is a perspective view showing a state where a contact is press-fitted. FIG. 8 is an external view showing a state in which a watertight cover is attached to the connector body.

First, the structure of the connector main body 2 shown in the embodiment will be described. The contact 1 used for the connector body 2 is a VVF cable 3,
A brass plate having a hardness higher than 3 ′ is press-formed in a flat plate shape. As shown in FIG. 3, two U-shaped cut portions 11 are formed at a predetermined interval D. is there. The lower end portion is formed in a V-shape like a cutting blade. The cutting blade cuts the outer skin 31 and the inner skin 32 of the VVF cables 3 and 3 ′, and reaches the inner conducting wire 33. Are pressed and deformed from both sides while being pressed. The thinner contact 1 has the advantage that it can be easily mounted since a thinner one does not require a strong force for press-fitting, but a certain thickness is required to obtain a predetermined strength. The thickness of the notch 11 is as follows.
Is selected in consideration of the width of
The one having about 0.8 mm is used.

The thickness of the contact 1 and the cut 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 includes two main body components 2a and 2b of substantially the same shape and two cover bodies 26,
26, and each of the main body components 2a, 2
b, two grooves 21 and 22 for inserting and fitting the two-core VVF cable 3 on the consolidation side (branched side) and the two-core VVF cable 3 ′ for branching are separated by a predetermined interval E. It is formed in parallel, is provided with an insertion hole 23 for the contact 1, is foldably connected at one side by a foldable portion 24, and has a structure in which the other side is fitted to each other by fitting portions 20 a and 20 b. The bodies 26, 26 extend outward from the folded portions 25, 25 that are connected to the other sides of the two main body components 2a, 2b, and include hook portions 27, 27 on the distal end side. , 2b so as to be freely foldable.

The width of each of the grooves 21 and 22 is substantially equal to the width w of the narrow side of each of the VVF cables 3 and 3 '. The facing width (the sum of the depths of the opposed grooves) of the grooves 21, 21, 22, and 22 in the folded position in which the main body components 2a and 2b are fitted to each other is determined by the respective VVF.
The widths of the cables 3 and 3 'are substantially the same as the width W of the power supply line parallel side (wide side), and are formed to have a width that allows the cables to be sandwiched without gaps. These two grooves 2
The interval between the center lines 1 and 22, that is, the interval E between the center lines, is formed to be substantially equal to the interval between the two cut portions 11, 11, that is, the interval D between the center lines. Also,
As shown in FIGS. 4 and 6, the insertion hole 23 for inserting the contact 1 is formed in a size suitable for inserting and temporarily holding the lower half of the contact 1.

The folded portion 24 between the two main body components 2a, 2b and the folded portions 25, 25 between the two cover members 26, 26 and the main body components 2a, 2b are formed in a W-shape in side view. The lower bottom part is formed thin. Thus, the contact 1 is, as seen in FIG.
The lower half is inserted into the respective insertion holes 23, 23 of the main body components 2a, 2b and temporarily held.

The connector main body 2 in this embodiment is a connector for obtaining only one branch line from the VVF cable 3 on the branch line side.
Shielding walls 28, 28 for closing the grooves are formed at one end of the grooves 22, 22 on the side through which the F cable 3 'is inserted, and the cut end of the VVF cable 3' on the branch side is applied to the shielding wall 28. It can be made to protrude only in one direction.

As shown in FIG. 1, the outer cover 4 covering the outer peripheral surface of the connector main body 2 has a space portion 44 in which the entirety of the connector main body 2 is housed, and the two outer cover portions 4 in the axial direction of the cable. Opening portions 47, 47 in contact with the outer peripheral surfaces of the VVF cables 3, 3 ', and are connected by a bendable connection portion 45 on one side, and are mutually engageable on the other side. This is a structure constituted by split bodies 4a and 4b having 46a and 46b.

The main body interior space 44 is provided with a plurality of space forming small projections 41 for forming a space 42 as a gap for injecting a chemical solution for watertight sealing between the main body interior space 44 and the connector main body 2. It has a structure provided with a small hole 43 for injecting a watertight hardening agent at the center portion of one of the two split bodies 4a, and a liquid watertight material is introduced from the small hole 43 into the space 42 for watertight sealing. By injecting a curing agent and curing the same, the entire branch connection portion of the electric wire is maintained in a watertight state. As described above, the gap space 42 can be similarly formed even when the protrusion 41 for forming the space is formed so as to protrude on the outer peripheral surface of the connector main body 2.

In order to branch an electric wire using the connector body 2 configured as described above, the double-core VVF cable 3 on the wired side (branch line side / branched line side) is subjected to any processing. As shown in FIG. 5 in the state of covering without any of the components, either one of the main body components 2a and 2b (here, 2
a) Inserting the two-core VVF cable 3 ′ into the adjacent groove 22 so that the cross section is in a vertical posture.
Is inserted with its cut end face against the shield plate 28, and then the other component (here, 2) as shown in FIG.
b) is folded from the folding part 24, put on it and pressed, and the fitting parts 20a and 20b are mutually fitted on the other side.

Next, the upper end surface of the contact 1 is pressed by a pressing tool, and is pushed into the contact insertion hole 23 so that the entire contact 1 is buried, as shown in FIG. 7, and finally as shown in FIG. Then, the respective cover members 26, 26 are bent from the folded portions 25, 25 connected to the main body components 2a, 2b so as to cover the outer side surface of the contact 1, and the hook portions 27 formed on the respective distal end sides thereof are removed. Engaging portion 27 formed on main body components 2a, 2b
a.

By doing so, the contact 1 cuts the outer skin 31 and inner skin 32 of the two parallel cables 3 and 3 'and makes electrical contact with the inner conducting wires 33 and 33. The external shape of the connector body 2 thus configured is as shown in the upper part of FIG.

In order to cover the connector body 2 in a watertight manner with the jacket cover body 4, the entire connector body 2 is divided into one half of the jacket cover body 4 as shown by arrows in FIG. An engaging portion which is inserted into the space portion 44 of the body 4b, and which is covered with the other split body 4a by folding it from the connecting portion 45 on one side which can be freely bent, and on the other side being freely engageable with each other. By engaging the 46a and 46b with each other, the engaged state is maintained as shown in FIG.

After the above operation, the upper two spaces are formed in the watertight sealing space 42 formed between the connector main body 2 and the plurality of space forming projections 41 projecting into the space portion 44. A commercially available liquid foaming liquid-tight hardening agent is injected through the small hole 43 for injecting the watertight hardening agent formed in the central portion of the split body 4a, and is foamed and cured.
By doing so, the entire outer peripheral surface of the connector, to which the electric wires are branched and connected, is kept in a watertight state.

FIGS. 9 and 10 show the second structure of the connector body 2.
In the connector body of this embodiment, the contact 1 has an inverted U-shape in side view, has two contact flat plates, and each of the body components 2a constituting the connector body 2. , 2b are formed with two contact insertion holes 23, 23, respectively. Then, the contact insertion holes 23, 23 of this embodiment
The recess 2 into which the connecting bottom portion 12 of the letter-shaped contact 1 fits
3a. Further, the connector main body 2 of this embodiment is constituted by only two main body components 2a and 2b, and has a structure without the two covers 26 and 26 shown in the first embodiment. Other points are the same as those in the first embodiment.

The connector main body 2 thus constructed has the same structure as the outer cover 4 shown in the first embodiment.
In other words, the outer casing is covered by an outer cover body in which only the depth of the main body interior space portion 44 is reduced by the thickness of the cover body 26,
It is used as a watertight structure as described above.

As another embodiment of the outer cover 4,
Although not shown, one of the cover members 4b constituting the cover member 4 is formed in a box shape having a main body interior space portion 44 having a depth such that the entire connector main body 2 fits into the connector, and the other cover member 4a can be embodied as a substantially flat plate having a U-shape having a side wall for closing only the upper part of the electric wire.

Further, as still another embodiment structure, one box-shaped cover member 4b in the outer cover member 4 is provided.
Is formed at the lower part of the outer periphery of the component 4b, and the other component 4a is formed as a substantially L-shaped cover body. May be formed, and the side wall on the side where the engaging portion is formed may be a double wall. For other structures, the first
What is necessary is just to carry out similarly to an Example.

FIGS. 11 to 13 show a third embodiment of the connector main body 2. The connector 2 of this embodiment has two branch lines from the VVF cable 3 on the bundled line side. The second embodiment shown in FIG.
As shown in FIG. 11, the grooves 21 and 22 are penetrated over the entire width of the main body components 2a and 2b, respectively, and as shown in FIGS. 12 and 13, the VVF cable 3 'on the branch side. Are protruded outward from both sides of the insertion groove 22, so that the respective protruding lines of the cable 3 'protruding on both sides are used as branch lines to obtain two branch lines.

As shown in FIG. 13, the outer cover body 4 that covers the connector main body 2 is provided with two VVs on both sides of the cover members 4a and 4b.
It has two openings 47, 47 in contact with the outer peripheral surfaces of the F cables 3, 3 '.

Although the embodiments and modifications that are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of these embodiments and modifications, and the present invention is not limited thereto. The present invention has the structural requirements, achieves the object of the present invention, and can be appropriately modified and implemented within a range having the following effects.

[0033]

In the watertight connector according to the present invention, the width of the two grooves formed in the connector main body is substantially the same as the width w on the narrow side of the VVF cable to be used. The opposing widths of the opposing grooves in a state where they are fitted to each other are formed so as to be substantially equal to the width W of the VVF cable on the side of the conducting wire, and the interval E between the two grooves and the two cuts of the contact Since the space D is formed so as to substantially coincide with the interval D between the parts, a small connector body is formed, and the entire outer peripheral surface is covered with a watertight cover body so as to keep a space for watertight sealing. There is a remarkable effect that the entirety of the wire branching portion by the contact main body can be reliably maintained in a watertight state by utilizing the watertight sealing space.

Therefore, even in the branching work of an outdoor electric wire at various construction sites or outdoor construction sites where watertightness is particularly required, it is necessary to perform the complicated work of removing the insulation coating, and furthermore, to avoid the electric shock. This has a remarkable effect that the branch connection of the electric wire can be performed in a state where there is no danger of causing an accident, and an electric wire branch having no danger of a leak or an electric shock can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded explanatory view of a main part showing a first embodiment.

FIG. 2 is an overall perspective view of the inner surface side of the connector main body.

FIG. 3 is a perspective view of a main body rear side of FIG. 2 before a contact is mounted.

FIG. 4 is a perspective view of the rear side of the main body of FIG. 2;

FIG. 5 is a perspective view of a state where a cable is inserted into the groove of FIG. 2;

FIG. 6 is a perspective view of the cable fitting state of FIG. 5;

FIG. 7 is a perspective view of the contact press-fit state of FIG. 6;

FIG. 8 is an external perspective view of the watertight cover body inserted state.

FIG. 9 is a perspective view of a portion corresponding to FIG. 3 showing a second embodiment of the connector main body.

FIG. 10 is a perspective view of a portion corresponding to FIG. 4 in FIG. 9;

FIG. 11 is a perspective view of a portion corresponding to FIG. 2 showing a third embodiment of the connector main body.

FIG. 12 is a perspective view of a portion corresponding to FIG. 5 in FIG. 11;

FIG. 13 is a perspective view of a portion corresponding to FIG. 1 in FIG. 11;

FIG. 14 is an explanatory perspective view showing a conventional branch line forming means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact 11 Notch part 2 Main body 2a Main body constituent body 2b Main body constituent body 20 Fixed part 21 Groove 22 Groove 23 Contact insertion hole 24 Fitting part 28 Shielding plate 3 Hot wire side VVF cable 3 'Branch side VVF cable 31 Insulation sheath 32 Insulation Endothelium 33 Conducting wire 4 Outer cover 41 Space forming projection 42 Space 43 Small hole D Notch spacing E Groove spacing W Width of parallel side of conducting wire w Width of narrow side of conducting wire

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 4/24 H01R 4/70 H01R 31/02 H01R 31/08

Claims (3)

(57) [Claims] A connector for branching and connecting a two-core VVF cable (3 ') for branching from a two-core VVF cable (3) of a main line, wherein the connector is insulated from a contact (1) made of a highly conductive metal plate. Synthetic resin body (2) and outer cover (4)
The contact (1) cuts the insulating outer cover (31) and the insulating inner cover (32) of the two VVF cables (3) and (3 ') and makes electrical contact with the inner conductive line (33). Notches (11), (1
1) is formed at a predetermined interval (D), and the main body (2) is
Insertion of the two parallel grooves (21), (22) formed at a predetermined interval (E) for inserting the two VVF cables (3), (3 ') and the contact (1). Hole (23) and relative mating fixing part (24),
(20) Two main body components (2a) and (2b) of a half-split type having
And the two grooves (21) and (22) are formed to be substantially the same width as the narrow side width w of the two VVF cables (3) and (3 ′), respectively. ), (2b) the width of the groove (21), (21), (22), (22) in the folded position between the two VVF cables (3), (3 ') is the width of the conducting wire parallel side W are formed so as to have substantially the same width as W.
(21), the interval (E) between (22) and the interval (D) between the two cuts (11) and (11) of the contact (1) are formed at intervals that substantially match, and the outer cover body ( 4) has a small hole (43) for injecting a watertight curing agent in a part of the peripheral wall, and has a space slightly larger than the main body (2), and is used for watertight sealing with the main body (2). A watertight connector structured to cover the entire peripheral surface of the main body (2) with the space (42). 2. A connector for branch-connecting a two-core VVF cable (3 ') for branching from a two-core VVF cable (3) of a main line, wherein the connector is insulated from a metal plate contact (1) rich in electrical conductivity. Synthetic resin body (2) and outer cover (4)
The contact (1) cuts the insulating outer cover (31) and the insulating inner cover (32) of the two VVF cables (3) and (3 ') and makes electrical contact with the inner conductive line (33). Notches (11), (1
1) is formed at a predetermined interval (D), and the main body (2) is
Insertion of the two parallel grooves (21), (22) formed at a predetermined interval (E) for inserting the two VVF cables (3), (3 ') and the contact (1). Hole (23) and relative mating fixing part (24),
(20) Two main body components (2a) and (2b) of a half-split type having
And the two grooves (21) and (22) are formed to be substantially the same width as the narrow side width w of the two VVF cables (3) and (3 ′), respectively. ), (2b) the width of the groove (21), (21), (22), (22) in the folded position between the two VVF cables (3), (3 ') is the width of the conducting wire parallel side W are formed so as to have substantially the same width as W.
The interval (E) between (21) and (22) and the interval (D) between the two cut portions (11) and (11) of the contact (1) are formed so as to substantially coincide with each other. 2) The two grooves (21) and (22) of which two grooves (22) for inserting the two-core VVF cable (3 ') on the branch side are provided with a shielding wall (28) at one end. The outer cover body (4) is provided with a small hole (43) for injecting a watertight curing agent in a part of the peripheral wall, and has a space slightly larger than the main body (2), and the main body (2) A watertight connector having a structure for covering the entire peripheral surface of the main body (2) with a space (42) for watertight sealing between the main body (2). 3. A connector for branch-connecting a 2-core VVF cable (3 ') for branching from a 2-core VVF cable (3) of a main line, wherein the connector is insulated from a contact (1) made of a metal plate rich in electrical conductivity. Synthetic resin body (2) and outer cover (4)
The contact (1) cuts the insulating outer cover (31) and the insulating inner cover (32) of the two VVF cables (3) and (3 ') and makes electrical contact with the inner conductive line (33). Notches (11), (1
1) is formed at a predetermined interval (D), and the main body (2) is
Insertion of the two parallel grooves (21), (22) formed at a predetermined interval (E) for inserting the two VVF cables (3), (3 ') and the contact (1). Hole (23) and relative mating fixing part (24),
(20) Two main body components (2a) and (2b) of a half-split type having
And the two grooves (21) and (22) are formed to be substantially the same width as the narrow side width w of the two VVF cables (3) and (3 ′), respectively. ), (2b) the width of the groove (21), (21), (22), (22) in the folded position between the two VVF cables (3), (3 ') is the width of the conducting wire parallel side W are formed so as to have substantially the same width as W.
(21), the interval (E) of (22) and the interval (D) of the two cut portions (11) and (11) of the contact (1) are formed at intervals substantially matching, and the outer cover body ( 4) is provided with a small hole (43) for injecting a watertight curing agent in a part of the peripheral wall, and for forming a plurality of intervals on the inner peripheral surface of the cover body (4) or the outer peripheral surface of the main body (2). Protrusion
(41), and a space (42) for watertight sealing is provided between the projection (41) and the main body (2) to cover the entire peripheral surface of the main body (2). Has a watertight connector.