JP3013163B2 - Branch connector for single line opening and closing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a VVF cable in which a plurality of core wires, each of which is generally used as a power line and is insulated and coated with a single conducting wire, are arranged in parallel, and the outer periphery thereof is coated with an insulating sheath. When a branch line for connecting a load from a trunk line of such a VVF cable and a single-line branch line for a switch for turning on / off from a place away from the connected load are temporarily connected to a trunk line. The present invention relates to a connector that unifies the polarities of the current-carrying lines of the trunk line and each branch line and connects them without error even when the VVF cable is energized, and also enables a branch connection with a very simple operation.

[0002]

2. Description of the Related Art Conventionally, when such a VVF cable is connected to another VVF cable for branching, generally, first, the insulation at a branch point in the middle of the VVF cable on the trunk side is removed, and then the positive conducting wire and the negative electrode are connected. After exposing the energizing line and exposing the energizing line by removing the insulation of each VVF cable on the branch line side in the same manner, one of the energizing line of the main VVF cable and the one-branch VVF cable for the switch are connected. One energizing line, the other energizing line of the trunk VVF cable and one energizing line of the load branching VVF cable, and the other energizing line of the load branching VVF cable and the other energizing line of the switch single-branch VVF cable. , And one set each, insert the conducting wire of each combination into the metal sleeve inside the closed end insulating cap, press it over it with a press tool, and press the metal Crimp connecting sleeve by pressure variations, it has been or wound insulating tape as necessary.

[0003]

In the former method as described above, when the main line is a live line, the power supply must be stopped before the electric wire connection work because of the necessity of electric shock prevention. In the meantime, a power outage is unavoidable, and since the combination of the core wires of the cables to be connected to each other is specified in the wire connection work, the work is very troublesome, and as a result, the construction time However, there is a problem to be solved such that the work efficiency is poor due to a long working time.

Accordingly, the present invention has been made to solve the above-mentioned problems associated with the conventional method of connecting a switching cable and a load connecting cable, and to remove the covering of the VVF cable without removing the coating of the VVF cable. Whenever work is required, erroneous connection of polarity and the like can be eliminated by using a simple connector with a small number of parts and a branch connection work can be performed safely and quickly even if the trunk cable is energized. An object of the present invention is to provide a branch connector for opening and closing a single line.

[0005] The branch connector for opening and closing a single line according to the present invention for achieving the above object will be described with reference to symbols used in the description of the appearance and structure of the embodiment. A connector used for branch connection between a cable 3 'and a single-branch switch VVF cable 3'', comprising three contacts 1 and a main body 2 made of synthetic resin. When the contact 1 is made of a highly conductive material and cuts the insulating outer skin 31 and the insulating inner skin 32 of each of the VVF cables 3 and comes into contact with the conducting wire 33 to be connected to the cables ,
The contact area is equal to or larger than the cross-sectional area of the conducting wire 33.
The cut write <br/> viewed portion 11 cuts the width of the narrower dimension than the diameter of the current supply line 33, while being formed to be inclined to the insertion direction at both ends, and back shape a悌形 insulation The main body 2 is composed of half-shaped main body components 2a and 2b connected by a folding part 24 and a cover body 26 connected to the main body component 2a by a connection band 25, The main body 2a has a groove 21 having a width for inserting the trunk VVF cable 3 approximately equal to the maximum width of the VVF cable 3, and a width for accommodating the end of the load branching VVF cable 3 '. A groove 21 approximately equal to the maximum width of the VVF cable 3 'and one end of which is terminated by a shielding wall 28;
And a groove in which the end portion of the switch single-branch VVF cable 3 ″ is substantially equal to the maximum width of the switch single-branch VVF cable 3 ″, and one end of the groove ends at the shielding wall 28. 21 ″ are formed in parallel, and among the VVF cables arranged in parallel in order to insert the contacts 1 and make the cutout portions 11 contact the predetermined conducting wires 33, One energizing line 33 of the main VVF cable 3 and one energizing line 33 of the switch single-branch VVF cable 3 ″, and one of the other energizing line 33 of the main VVF cable 3 and one of the load branching VVF cables 3 ′. Inserting the contacts 1... Over the energizing line 33 and the other energizing line 33 of the load branching VVF cable 3 ′ and the other energizing line 33 of the switch single-branch VVF cable 3 ″, respectively.
Insertion holes 23, 23 ', 2 for regulating the insertion direction and the insertion position
3 '' is perforated.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In implementing a single-wire opening / closing branch connector having such a configuration, a contact 1 is used.
It is preferable to use a material having higher hardness and superior conductivity than soft copper used for the conducting wire 33 of the VVF cable 3 such as a hard copper alloy plate. Although the contact 1 may be a single flat plate, the cross-sectional shape when viewed from the side is substantially inverted U-shaped, and has a shape having two parallel pieces, so that the contact 1 comes into contact with the energizing wire 33 at two places. As a result, the connection state is stable both electrically and mechanically. In this case, the insulating sheath 3 is provided near the cut portion 11.
The work is facilitated if the cutting blades 13 are cut and inserted between the insulating inner skins 32, 32 of the adjacent core wires to form cutting blades 13 for separating the cores.

The cut width of the cut portion 11 of the contact 1 is determined by pressing the contact 1 against the VVF cable 3 and cooperating with the cutting blade 13 to cut off the insulating sheath 31 and the insulating inner skin 32 of the cable. The width is slightly narrower than the thickness of the conducting wire 33, and the conducting wire 33 is firmly pressed from both sides while being plastically deformed by the pressing force. Let it do. The thickness of the contact 1 and the width of the cutout 11 are related to the amount of plastic deformation of the conducting wire 33 received by the pressing force. It is preferable to set the area so as to have the above area. Also, by inclining the notch 11 with respect to the insertion direction, the positive and negative energizing wires in one cable act so as to separate from each other when the energizing wire is pressed and clamped, thereby causing an accident such as a short circuit. Can be prevented.

In order to maintain the contact state between the contact 1 and the pressing tool during the pressing operation, the upper surface of the contact 1 is covered with an insulating resin plate 14 made of a relatively strong resin such as nylon.

The connector body 2 is composed of two body parts 2a, 2b of substantially the same shape and a half-shape and a cover body 26. The shape of the body connected by the fold 24 and the connection band 25 is nylon, polyethylene, or the like. The whole is integrally molded with a resin material such as polypropylene. The grooves 21, 21 ′, 21 ″ formed in the main body constituting body 2 a are arranged in parallel at an appropriate interval from the center of each groove.
1, 21 'and 21''may be provided also in the main body structure 2b when the main body structures 2a and 2b are formed in substantially the same half-shape. Alternatively, a groove having a depth capable of accommodating the VVF cable may be formed only in the main body structure 2a, and the main body structure 2b may be shaped like a simple cover.

[0010] Of the three grooves, the load branching VV
The groove in which the F cable 3 'and the single-branch switch VVF cable 3''are housed is terminated by a shielding wall 28 to protect the inside from external factors that cause accidents such as rainwater intrusion. This shielding wall 28 may be formed integrally with the main body constituting body 2a. However, a fitting groove 28a is formed at a predetermined position inside the groove, for example, near the end of the groove, and the separately formed shielding wall 2a is formed therein.
8 may be fitted and attached.

As described above, the contact 1 is inserted into the main body structure 2a, and one of the conducting wires 33 of the main VVF cable 3 and one of the conducting wires 33 of the single-branch VVF cable 3 ″ for the switch, and the main wire are connected. The other energizing line 33 of the VVF cable 3 and one energizing line 3 of the load branching VVF cable 3 '
3, and the other energizing line 33 of the load branching VVF cable 3 'and the other energizing line 33 of the single-branch switch VVF cable 3'', respectively. For this purpose, insertion holes 23, 23 ', 23''are formed so as to straddle the corresponding conducting wires. The width of the insertion holes 23, 23 ', 23''is the same as that of the contact 1
Is a dimension in which the contact 1 having a length corresponding to the interval between each pair of the conducting wires 33 determined by the combination of the conducting wires can be inserted.

The length of the insertion hole, in other words, the length of the contact 1 is related to the interval between the cuts 11 provided at both ends of the contact 1, and the interval between the cuts 11 is connected. Since the distance corresponds to the distance between the power supply lines and the power supply lines, the distance between the above-mentioned three cables arranged inside the main body 2, the arrangement order of the cables, and the distance between the two core wires parallel to each other in the cable. It goes without saying that it is determined by The arrangement order of the three cables will be described in detail in the embodiment section. As an example, the trunk VVF cable 3 and the load branching VVF cable 3 ′ are provided in three grooves provided in parallel. Among them, in the grooves on both sides, for example, the groove 21 and the groove 21 ″, the polarities of the core wires are respectively arranged so as to be in the same direction.
It is most reasonable to arrange the VF cable 3 ″ in the middle groove 21 ′ in terms of standardization of contacts.

As a work of mounting the connect, the main line VVF cable 3, the load branching VVF cable 3 'and the switch single-side branching VVF cable 3' are inserted into the grooves 21, 21 'and 21''of the main body structure 2a. Are placed according to the above example. At this time, the main line VVF cable 3 penetrates through the inside of the main body 2 and is continuous. However, the load branching VVF cable 3 ′ and the switch single-side branch VVF cable 3 ″ are branched at the connector. The cut end face is placed in contact with the shielding wall 28. Then the main body 2
When the contact 1 is inserted from the insertion holes 23, 23 ', 23''and pressed by the crimping tool A, the cut portion 11 cooperates with the cutting blade 13. The cable is moved to the insulation sheath 31 and insulation sheath 3
2 is cut to supplement the energizing line 33, and the energizing line 33 is firmly pressed from both sides while being plastically deformed by the pressing force. After the contact 1 is inserted, the cover body 26 is placed from behind the main body component 2a to prevent rainwater or the like from entering from the three insertion holes.

[0014]

1 to 11 show a first embodiment of the present invention.
1 and 2 are perspective views showing the internal structure of the main body in a mounted state by expressing a part of the main body by virtual lines, and wiring diagrams for explanation showing connection relations with cables, and FIGS. 3 to 6 show the same embodiment. 7 to 9 are work process explanatory diagrams showing the mounting operation stepwise, and FIG. 10 is a cross-sectional view showing a contact state between a contact and a conducting wire when the mounting operation is completed. 11 is an external perspective view after the assembly is completed.

In the first embodiment, as shown in FIGS. 3 and 4, the contact 1 is made of a hard copper alloy plate such as phosphor bronze and has excellent electrical conductivity, and has a sectional shape viewed from the side. It is substantially inverted U-shaped and has a shape having two parallel pieces. By doing so, the conductive wire 33 is brought into contact with the conductive wire 33 at two places, and there is an effect that a stable connection state is obtained both electrically and mechanically.

The cut width of the cut portion 11 of the contact 1 is determined by pressing the contact 1 against the VVF cable 3 and cutting the outer and inner coatings of the cable by the pressing force. The width is a little narrower than the thickness of the conducting wire 33 because it is firmly pressed and clamped from both sides while being pressed. Contact 1
And the distance between the cuts 11 are related to the amount of plastic deformation of the conducting wire 33 received by the pressing force, and in the state of contact with the conducting wire 33, the contact area is larger than the cross-sectional area of the conducting wire 33. <br/> product and Do Ri, the contact resistance is extremely small, connected mutually
Current capacity between current line is set to be substantially contiguous with Do so that.

Further, in this embodiment, a cutting blade 13 is provided near the cut portion 11 of the contact 1 so as to cut the insulating sheath 31 and enter between the insulating inner cores 32 of the adjacent core wires to separate them. However, this is characterized in that the work is facilitated by cutting the insulating sheath 31 existing in the gap between the two parallel surfaces of the inverted U-shape in the longitudinal direction. Further, the cut portion 11 is formed to be slightly inclined so as to widen the interval between the two core wires of the VVF cable.

Although not shown in the drawings, a modification of the contact 1 having the same front shape as that of the contact 1 of the first embodiment and having a structure composed of only one metal plate can be considered. As in the case of the original contact 1, the edge (the side opposite to the cuts 11, 11) that receives the pressing force at the time of insertion is covered with an insulating material 14. This modification is characterized in that it can be manufactured at low cost.

In the first embodiment, the main body 2 is formed in a half-split shape, and grooves 21, 21 ′ and 21 ″ for accommodating three VVF cables are formed in the main body constituting body 2 a. A groove having the same structure as that formed in the structure 2a is also formed in the body structure 2b, and has a vertically symmetrical structure when combined. As an embodiment of the present invention, in addition to this structure, a groove having a depth capable of accommodating the VVF cable may be formed only in the main body 2a, and the main body 2b may be shaped like a simple cover.

Further, of the three grooves, the load branching VV
The shielding wall 2 is provided at the end of the grooves 21 'and 21 "in which the F cable 3' and the switch single-branch VVF cable 3" are stored.
8 is provided, and this shielding wall 28 is
a, but as shown in some of the shielding walls 28 in FIG. 5, a fitting groove 28a is formed at a predetermined position inside the groove, for example, near the end of the groove. A separately manufactured shielding wall 28 may be fitted and attached thereto. By forming such fitting grooves 28a in all the grooves, the three VVF cables 3, 3 ', 3''and the grooves 21, 21', 2
It has the feature that the degree of freedom of mutual correspondence with 1 ″ is increased.

The main VVF cable 3 and the VV of other branch lines
The connection work with the F cables 3 ', 3 "is performed by first opening and closing the main VVF cable 3 in the groove 21 of the main body structure 2a, the load branching VVF cable 3' in the groove 21 ', and opening and closing the groove 21". The dexterous single-branch VVF cables 3 '' are stored respectively. At this time, the polarity of the load branching VVF cable 3 'is changed to the main line VVF.
In order to match the polarity of the cable 3, the polarity of the switch single-branch VVF cable 3 ″ may be arbitrary,
At least the main line VVF cable 3 and the load branching VV
The F cable 3 'is arranged such that the polarity indication mark 34 of the cable is on the same side.

Next, the main body 2b is replaced with the main body 2a.
The hook 27a is hooked on the hook ring 27b so as to be combined, and the three contacts 1 are inserted through the insertion holes 23, 23 'and 23'', respectively (FIG. 8).
When pressed by the crimping tool A (FIG. 9), the cut portion 11 cooperates with the cutting blade 13 to cut off the insulating outer cover 31 and the insulating inner cover 32 of the cable to supplement the conducting wire 33, and to plastically deform the conducting wire 33. While pressing firmly. Contact 1
After the insertion, the cover body 26 is put on the main body constituting body 2a, and the hook 29a is hooked and fixed on the hook ring 29b to protect the inside from the external environment. FIG. 11 and FIG. 1 show the appearance after the work is completed and the internal state in which a part of the main body is represented by a virtual line. FIG. 10 shows a cross section taken along line XX in FIG. In the figure, L is a load, and S is a switch.

The arrangement of the three cables inside the connector of the present invention may be arbitrary without being limited to the above arrangement, but the first cable shown in FIGS. 1 and 2 and FIGS. The cable arrangement of the embodiment is considered to be most rational in that two of the three contacts need to have the same shape. That is, when the arrangement of the three cables is different from the embodiment, the two
The mutual positions of the current-carrying wires may change, and correspondingly, the lengths of all three contacts may be different from each other, resulting in a situation in which the production management of parts is troublesome. However, it goes without saying that the pull-out direction of the switch single-branch VVF cable 3 ″ and the load branch VVF cable 3 ′ is arbitrary as long as the polarity is taken into account at that time.

Although the embodiments which 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. The invention achieves the object of the invention and can be carried out with appropriate modifications within a range having the following effects.

[0025]

As described above, since the single-branch opening / closing branch connector of the present invention is constructed as described above, the contacts are connected to VV.
Each branch for safe and secure connection of load and opening / closing from a load away from the load by simple operation of just press-fitting into F cable, without interrupting electricity even if the main line is a live line. Lines can be branched and connected. Also, the contact area between the contact and the conducting wire is
Greater than the cross-sectional area of the wire, so the contact resistance is very low
Current capacity between mutually connected power lines is almost continuous.
Causes troubles such as heat generation at the connection.
Never. Furthermore, since the cut portions of the contacts act to separate the conducting wires in one cable from each other, the insulation between the positive and negative conducting wires is complete and safety can be improved.

Since the ends of the cables on the respective branch sides are in contact with the shielding walls, the conducting wires are electrically isolated from the surroundings, so that accidents such as short-circuits and short-circuits can be reliably prevented.

Furthermore, the number of components is small, and the main body has a simple structure integrally molded, so that it can be provided at a low cost, and the wiring work is simple, so that there is an effect that the cost for the construction can be reduced. It was reached.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an internal structure of a main body in a mounted state, in which a part of the first embodiment of the present invention is represented by a virtual line.

FIG. 2 is an explanatory wiring diagram showing a connection relationship between the first embodiment and a cable.

FIG. 3 is an external perspective view of the contact.

FIG. 4 is an external perspective view of the contact.

FIG. 5 is a perspective view of the outer shape before assembling the main body.

FIG. 6 is a perspective view of the outer shape before assembling the main body viewed from another direction.

FIG. 7 is an exploded perspective view at the start of a connection mounting operation.

FIG. 8 is an exploded perspective view during a connection mounting operation.

FIG. 9 is a perspective view showing a crimping step.

FIG. 10 is a cross-sectional view showing a contact state between a contact and a conducting wire.

FIG. 11 is an external perspective view after assembly is completed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact 2 Main body 2a Main body structure 2b Main body structure 21 Groove 21 'Groove 21 "Groove 23 Insert hole 23' Insert hole 23" Insert hole 24 Folding part 25 Connecting band 26 Cover body 28 Shielding wall 3 VVF on main line side Cable 3 'VVF cable on branch side 3' VVF cable on branch side 31 Insulation sheath 32 Insulation endothelium 33 Conducting wire A Crimping tool L Load S Switch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-130409 (JP, A) JP-A-8-124605 (JP, A) JP-A-51-140187 (JP, A) 14367 (JP, U) Japanese Utility Model Showa 54-99559 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 4/24

Claims (1)

(57) [Claims] 1. A main line VVF cable (3) to a load branching VVF cable (3 ') and a switch single-branch VVF cable.
(3 '') is a connector used to make a branch connection with the three contacts (1) ... and a synthetic resin body
(2) wherein the contact (1) is made of a highly conductive material and the contact (1) is connected to each of the VVF cables (3)
When the insulation sheath (31) and the insulation inner sheath (32) of the cable are cut and come into contact with the conducting wire (33) to be connected to the cable , the connection is made.
Energize so that the contact area is equal to or larger than the cross-sectional area of the energizing wire (33).
Cut part (1 ) with a cut width smaller than the diameter of the line (33)
1) are formed at both ends in an inclined manner with respect to the insertion direction , and the back shape is a tapered shape and is covered with an insulating material (14), and the main body (2) has a folded portion ( Half-shaped body components (2a) and (2b) connected by 24) and connecting band (25)
And a cover body (26) connected to the main body structure (2a). The width of the main body structure (2a) for inserting the trunk VVF cable (3) is equal to that of the VVF cable (3). Groove (21) almost equal to the maximum width and VVF cable for load branch (3 ')
The groove in which the end of the VVF cable (3 ') is substantially equal to the maximum width of the VVF cable (3') and one end of the groove terminates at the shielding wall (28)
(21 ') and single-branch VVF cable for switch (3 ")
The width at which the end of the cable is housed is substantially equal to the maximum width of the single-branch VVF cable (3 ″) for the switch, and the end is a shielding wall.
(28) is formed in parallel with the groove (21 '') which terminates at the cutout (1).
One of the VVF cables arranged in parallel so that 1) comes into contact with each of the predetermined conducting wires (33), one of the conducting wires (33) of the trunk VVF cable (3) and the one-branch switch VVF for the switch. One energizing line (33) of the cable (3 ''), the other energizing line (33) of the main VVF cable (3) and one energizing line (33) of the load branching VVF cable (3 '), and The other conducting wire (33) of the load branching VVF cable (3 ') and the single-branch switch VV
Straddling the other conducting wire (33) of the F cable (3 '')
A one-way open / close branch connector having insertion holes (23), (23 '), and (23'') for regulating the insertion direction and insertion position of the contacts 1 .