JP2012014975A - Insulating electric wire connection structure and connection method - Google Patents

Abstract

[PROBLEMS] To suppress the damage to a conductor as much as possible when twisting the conductor portions of each conductor to be connected together, and to damage the conductor even when the number of wires to be connected is large or the conductor cross-sectional area is large. To minimize.
In a first electric wire, a first overlapping covering portion in which first covering portions on both sides sandwiching the exposed first conductor portion overlap, and an exposed second electric wire in a second electric wire. The second overlapping coating portion 12 where the second coating portions 31 on both sides sandwiching the conductor portion overlap, the exposed first conductor portion and the second conductor portion are folded back, and the inside of the folded conductor portion The first conductor portion and the second conductor portion that are twisted together in a state where the other conductor portion is located on the second conductor portion and a part of the folded conductor portion intersects with the folded portion of the other conductor portion. Includes a cross-junction conductor portion 13 integrally ultrasonically bonded.
[Selection] Figure 1

Description

  The present invention relates to an insulated wire connection structure in which a plurality of insulated wires are twisted and electrically connected, and in particular, an insulated wire connection structure and connection capable of ensuring sufficient connection strength during the connection work. It is about the method.

  Conventionally, for example, when electrically connecting insulated wires having insulating coatings by twisting them, strip the insulating coating at a place to be connected to a predetermined length to expose the conductors, and solder the exposed conductors to each other. Various connection methods such as simply twisting together by hand are used (see, for example, Patent Documents 1 and 2).

  For example, as shown in FIG. 8, the connection method described in Patent Literature 1 includes a cylindrical housing having a widened inlet 101 and two holes 102 having an angle, and a rotating shaft 103. The rotary cord 100 is used to insert the two cords into the hole 102 and then rotate the rotating shaft 103, thereby rotating the two cords simultaneously and twisting them together for connection. .

  In addition, the connection method described in Patent Document 2 is a method of performing an interconnecting spiral torsion connection between two wires 203 and 204 as shown in FIG. After the wires 203 and 204 are positioned in a side-by-side relationship in the cavity means (not shown), a mutual rotation is performed between the two members 201 and 202 of the two-member connector. The cavity means has such a shape that the wires 203 and 204 can be introduced only in a side-by-side relationship with the cavity means when the wires 203 and 204 are in a specific direction with respect to the cavity means. Causing the jamming of each wire 203, 204 relative to the inner surface of the wire and the braking action of the wire 203, 204 to control the mutual longitudinal movement between the wires in continuous rotation and the two members 201, Both the forces in the proximity direction of 202 are maintained. In the figure, reference numerals 203A and 204A denote storage portions in the connector.

  Further, particularly in recent years, ultrasonic bonding is frequently employed from the viewpoint that the connection work is simple and reliable. For example, in the method shown in FIG. 10, the portions where the insulating coatings of the plurality of insulated wires 301 to 304 are stripped and the conductors 301 </ b> A to 304 </ b> A are exposed are simply arranged in parallel (including the meaning of overlapping in parallel). The conductors 301 </ b> A to 304 </ b> A are connected to each other by applying ultrasonic bonding to the portions arranged in a row.

  When ultrasonic bonding is performed by such a method, there is a problem in connection strength. Specifically, there is a problem that the conductor is partially broken due to insufficient connection strength.

  Therefore, for example, a method for connecting an insulated wire as described in Patent Document 3 has been proposed. That is, as shown in FIG. 11 and FIG. 12, the method for connecting the insulated wires is to expose the conductors 401A to 404A by stripping the insulation coating of the plurality of insulated wires 401 to 404 to a predetermined length. The conductors 401A to 404A are twisted together in the same direction, and the twisted portions are welded and connected by ultrasonic bonding. Thereby, when electrically connecting the plurality of insulated wires 401 to 404, sufficient connection strength can be secured even if the conductors 401A to 404A are connected by ultrasonic bonding.

Japanese Utility Model Publication No. 5-37227 Japanese Patent Laid-Open No. 2005-32544 Japanese Patent Laid-Open No. 2005-32544

  However, in these connection methods, for example, in the method described in Patent Document 1, there are problems such as that the cord is hard in material or that it is difficult to twist the cord well if the number of cords is large. Further, the method of the cited document 2 has a disadvantage that it is difficult to connect well with a twisted electric wire. It is also necessary to take measures such as preparing connectors according to the number and diameter of cords.

  Furthermore, in the method described in the cited document 3, when the exposed conductor is twisted, it is necessary to hold the conductor part with a jig or the like. Therefore, the conductor holding part causes damage to the conductor, such as scratches or disconnections. There is a risk of giving. Further, if the number of wires is large or the conductor cross-sectional area is large, the conductor damage due to the holding portion becomes large, so that there are cases where the connection cannot be made well.

  The present invention has been made in view of the above-described circumstances, and its purpose is to suppress the damage to the conductor as much as possible when twisting together the conductor portions of the respective conductive wires to be connected, and the wire to be connected. An object of the present invention is to provide an insulated wire connection structure and connection method capable of minimizing conductor damage even when the number of conductors is large or when the conductor cross-sectional area is large.

In order to achieve the above-described object, the insulated wire connection structure according to the present invention is characterized by the following (1).
(1) A connection structure of insulated wires in which conductor portions of each of a plurality of electric wires exposed by removing a part of the covering are twisted together and ultrasonically joined together,
A first overlapping coating portion on which the first coating portions on both sides sandwiching the exposed first conductor portion in the first electric wire overlap;
A second overlapping coating portion where the second coating portions on both sides sandwiching the exposed second conductor portion in the second electric wire overlap;
The exposed first conductor part and the second conductor part are folded back, the other conductor part is located inside the folded conductor part, and a part of the folded conductor part The first conductor portion and the second conductor portion twisted together in a state of intersecting the folded part of the other conductor portion, and a cross-junction conductor portion integrally ultrasonically bonded,
Be provided.

  According to the connection structure of the insulated wire described in (1) above, when forming the connection structure of the insulated wire, it is possible to hold the covering portion of the wire and entangle the conductor portions of the wire. When conductor parts of each conductor to be twisted are twisted together, the damage to the conductor is minimized, and conductor damage is minimized even when the number of wires to be connected and the conductor cross-sectional area are large. Can be suppressed.

Moreover, the connection method of the insulated wire of the meter apparatus which concerns on this invention is characterized by the following (2)-(3).
(2) removing a part of each covering of the two electric wires to expose the conductor;
The exposed conductor is folded back partly for each electric wire, the other conductor is located inside the folded conductor, and the part of the folded conductor is folded back by the other conductor. In a state of crossing the part, the process of overlapping the covering parts on both sides sandwiching the exposed conductor for each electric wire,
Twisting the folded conductors of each of the two electric wires by twisting one of the overlapping covering portions against the other covering portion; and
Ultrasonically bonding the twisted conductors;
Having
(3) In the method for connecting insulated wires according to (2) above,
Further comprising the step of processing the twisted conductors into a predetermined shape using a forming jig,
In the step of ultrasonic bonding, the conductor processed into a predetermined shape is ultrasonically bonded.

  According to the method for connecting insulated wires described in (2) above, since the conductor portions of the electric wires can be entangled while holding the covering portion of the electric wires, the conductor portions of the respective conductive wires to be connected are twisted together. Provides a method for connecting insulated wires that minimizes conductor damage and minimizes conductor damage even when the number of wires to be connected is large or when the conductor cross-sectional area is large. it can.

  According to the method for connecting an insulated wire described in (3) above, it is possible to prevent the occurrence of core breakage by avoiding local concentration on a part of the stress.

  According to the connection structure of the insulated wire of the present invention, when the conductor portions of the respective conductive wires to be connected are twisted together, damage to the conductor is suppressed as much as possible, and when the number of wires to be connected is large or the conductor cross-sectional area is large. Even in this case, conductor damage can be minimized.

  The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading through the modes for carrying out the invention described below with reference to the accompanying drawings.

It is a top view which shows the connection structure of the insulated wire to which the connection method of the insulated wire which concerns on embodiment of this invention was applied. (A) is one electric wire used for the connection structure of the insulated wire, (B) is explanatory drawing which shows the state which peeled the coating | cover. (A) is the other electric wire used for the connection structure of the insulated wire, (B) is explanatory drawing which shows the state which peeled the coating | cover. (A) is explanatory drawing which shows the work process when crossing and twisting a conductor which is one process in the connection method of the connection structure of the insulated wire, (B) is an alternative of the work process of (A) It is explanatory drawing which shows a method. It is explanatory drawing which shows 1 process of the connection method of the connection structure of the insulated wire. It is explanatory drawing which shows 1 process of the connection method of the connection structure of the insulated wire. It is explanatory drawing which shows 1 process of the connection method of the connection structure of the insulated wire. It is sectional drawing which shows the tool for electrically twisting and connecting the conventional insulated wires. It is sectional drawing which shows the method of twisting a cable using the other conventional connection tool. (A)-(D) are explanatory drawings which show the further conventional twisting method of another electric wire. (A), (B) is explanatory drawing which shows the conventional method of twisting another electric wire further, Comprising: It is the front view and side view which show the state before twisting. (A), (B) is the front view and side view which show the state in the middle of twisting in the twisting method of the conventional electric wire shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an insulated wire connection structure 10 according to an embodiment of the present invention, and this insulated wire connection structure 10 has a plurality of twisted connections (two in this embodiment, In particular, it is not limited to two, but may be three or more.) For the electric wires 20 and 30, a covering portion of a portion (referred to as an “intermediate portion”) that avoids the terminal end is provided. Conductors (hereinafter referred to as conductor portions; see FIGS. 2 and 3) 22, 32 (see FIGS. 2 and 3) constituting core wires that are peeled off by a predetermined length, removed, and exposed (stripped in the middle). By twisting and twisting each other so as to cross each other, they are twisted and integrally ultrasonically bonded to each other. The superposed coating portions 11 and 12, the cross-joining conductor portion 13, and Y Character conductor portions 14 and 15.

  As shown in FIG. 4 (A), the polymer coating portion 11 has a pair of coating portions 21 on the left and right sides of the covering of the electric wire 20 shown in FIG. It has a superposed configuration.

  Similarly, with respect to the superposed coating portion 12, as shown in FIG. 4A, a pair of coating portions 31 on both the left and right sides of the covering of the electric wire 30 shown in FIG. The structure is superposed in an aligned state.

  As shown in FIG. 4B, the crossed conductor portion 13 has the exposed conductor portions 22 and 32 folded back into two at the center folding point, and the folded conductor portion 22 (32). ), The other conductor portion 32 (22) is located. Further, the conductor portions 22 and 32 that are folded back are crossed so as to be crossed and twisted together to be twisted together. The mating conductor portions 32 and 22 crossed so as to cross each other are integrally joined by ultrasonic joining and have a predetermined shape (for example, a quadrangular prism).

  In the present invention, the twisting is performed before the ultrasonic machining is performed in this way because the interface between the conductor part (core wire) 22 and the conductor part (core wire) 32 varies in various directions depending on each part. This is because the welding strength can be increased in the subsequent ultrasonic treatment. In addition, in this case, since the covering portions 21 and 31 of the electric wires 20 and 30 are fixed and held so that the electric wires are entangled and multiplied, the stripped conductor portions (core wires) 22 and 32 are connected to each other. Damage can also be reduced.

  In addition, in the insulated wire connecting method of the present embodiment, which will be described later, forming processing is performed prior to ultrasonic processing, whereby the shape of the cross-joining conductor portion 13 is integrated into a predetermined shape. It is arranged together. The reason why the forming is performed before the ultrasonic machining is performed in this way is to prevent stress concentration and to prevent the breakage of the core wire.

  The Y-shaped conductor portion 14 (15) connects the superposed coating portion 11 (12) and the cross-joined conductor portion 13 of each electric wire 20 (30), and is composed of a conductor exhibiting a substantially Y-shape. Yes.

Next, a method for manufacturing the insulated wire connection structure 10 according to the present embodiment will be described with reference to FIGS.
First, a plurality of electric wires 20 and 30 (two in this embodiment) to be connected are prepared (see FIG. 2A and FIG. 3A), and portions where the electric wires 20 and 30 are not terminated. Stripping is performed on the (intermediate portion), that is, the portion that secures the minimum necessary extra length from the end. That is, the coverings of the electric wires 20 and 30 are peeled off by a predetermined length (L) and removed to expose the conductor portions 22 and 32 by a predetermined length (L) (see FIGS. 2B and 3B). ).

  Here, the edge portions of the covering portion 21 and the covering portion 31 that sandwich the conductor portion 22 and the conductor portion 32 of each electric wire from both sides are respectively referred to as “conductor edge portion 21A” and “conductor edge portion 31A”. "

  In this way, each electric wire 20, 30 is folded in two with the intermediate portion (L / 2) of each conductor portion 22, 32 exposed by a predetermined length (L) as a reference point for folding. The conductor portions 22 and 32 of 20 and 30 are formed in a loop shape (see FIG. 4). Each of the looped conductor portions 22 and 32 is referred to as a “crossing conductor portion α”.

  And it cross | intersects so that hole S 'of the other electric wire 30 may be entangled with the hole S formed by making the conductor part 22 of one electric wire 20 into a loop shape. That is, the other conductor part 32 (22) is located inside the hole S (S ′) of the folded conductor part 22 (32), and a part of the folded conductor part 22 (32) is the other. It intersects with a part of the folded conductor portion 32 (22).

  Here, as shown in FIG. 4A, in the electric wire 20, the covering portion 21 arranged on the left side so as to face the intersecting conductor portion α (the loop-shaped conductor portion 22) has a pair of conductor borders. The portions 21A are overlapped so as to be flush with each other. The covering portion 21 thus superposed constitutes the polymerization covering portion 11. Similarly, in the electric wire 30, the covering portion 31 disposed on the right side so as to face the crossing conductor portion α (the loop-shaped conductor portion 32) is also overlapped so that the pair of conductor edge portions 31 </ b> A are flush with each other. The superposition | polymerization coating | coated part 12 is comprised.

  Next, either one of the left and right overlapping coating portions 11 and 12 of the electric wires 20 and 30 (the left overlapping coating portion 11 in FIG. 4A) is fixed and held by a fixing means not shown. On the other hand, in FIG. 4A, the right superposed coating portion 12 is held by a rotating means not shown. Then, the two conductor portions 22 and 32 are simultaneously twisted together by turning the cross conductor portion α on one side (the right conductor portion 32 in FIG. 4A) to be twisted with respect to the other. As shown in FIG. 5, they are integrated so as to be integrated into one piece (called “twisted conductor portion β”).

  Note that the twisting operation by twisting here is as shown in FIG. 4 (B), in which both the left and right superposed coating portions 11 and 12 are held by rotating means not shown in the drawing and simultaneously opposite to each other. By turning in the direction, the two conductor portions 22, 23, that is, the crossing conductor portions α are twisted together and twisted together to be integrated into one to form a twisted conductor portion β. You may do it.

  Next, the twisted conductor portion β in which both the conductor portions 22 and 32 of the electric wires 20 and 30 are twisted together is illustrated while holding both the left and right overlapping coating portions 11 and 12 by a fixing and holding means (not shown). By applying pressure using a pair of upper and lower forming jigs and the like (by forming), a predetermined shape (for example, a substantially quadrangular prism shape, etc., as shown in FIG. 6). It is processed so that the outer shape is adjusted.

  Thereby, the site | part which faces the conductor adjacent edge part 21A (31A) of the conductor part 22 (32) of each twisted electric wire 20 (30) which is the twisted conductor part β is substantially Y-shaped, and is a polymerization coating part. 11 (12) and the forming conductor portion γ are formed with a Y-shaped conductor portion 14 (15).

  The forming conductor portion γ twisted and processed in this way constitutes an ultrasonic bonding means as shown in FIG. 7, for example, while holding both the left and right overlapping coating portions with a fixing holding means (not shown). The horn 41 and the anvil 42 are used for ultrasonic bonding by pressurizing and vibrating. Thereby, the cross-junction conductor part 13 which will be in the state by which the conductor parts 22 and 32 of both the electric wires were welded completely integrally from the forming conductor part (gamma) is formed.

  When the cross-joining conductor portion 13 is formed in this way, the cross-joining conductor portion 13 is taken out from the horn 41 and the anvil 42 and the left and right overlapping coating portions 11 and 12 are fixedly held. If the fixed holding means is removed, the connection structure 10 according to the embodiment of the present invention is completed.

  Therefore, according to the manufacturing method of the insulated wire connection structure 10 of the present embodiment, the conductor portions 22 and 32 are twisted, and therefore the damage to the conductor portions 22 and 32 is very small. In ultrasonic processing, since the interface between conductor part 22 and conductor part 32 which are core wires is arranged in various directions, an increase in welding strength can be realized. Therefore, when the conductor parts 22 and 32 which are core wires are twisted together to form the connection structure 10 of the present invention, the connection structure method of the present invention can be used even when the number of wires is large or the conductor electric area is large. Applicable.

  The present invention is not limited to the embodiment described above, and can be implemented in various forms without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Connection structure of an insulated wire 11, 12 Superposition coating part 13 Cross junction conductor part 14, 15 Y-shaped conductor part 20, 30 Electric wire 21, 31 Cover part 21A Conductor edge part 31A Conductor edge part 22, 32 Conductor part alpha crossing Conductor part β twisted conductor part γ forming conductor part S, S 'hole

Claims (3)

It is a connection structure of insulated wires in which conductor portions of each of a plurality of wires exposed by removing a part of the covering are twisted together and ultrasonically joined together,
A first overlapping coating portion on which the first coating portions on both sides sandwiching the exposed first conductor portion in the first electric wire overlap;
A second overlapping coating portion where the second coating portions on both sides sandwiching the exposed second conductor portion in the second electric wire overlap;
The exposed first conductor part and the second conductor part are folded back, the other conductor part is located inside the folded conductor part, and a part of the folded conductor part The first conductor portion and the second conductor portion twisted together in a state of intersecting the folded part of the other conductor portion, and a cross-junction conductor portion integrally ultrasonically bonded,
A structure for connecting an insulated wire, comprising: Removing a part of the covering of each of the two wires to expose the conductor;
The exposed conductor is folded back partly for each electric wire, the other conductor is located inside the folded conductor, and the part of the folded conductor is folded back by the other conductor. In a state of crossing the part, the process of overlapping the covering parts on both sides sandwiching the exposed conductor for each electric wire,
Twisting the folded conductors of each of the two electric wires by twisting one of the overlapping covering portions against the other covering portion; and
Ultrasonically bonding the twisted conductors;
A method for connecting an insulated wire, characterized by comprising: Further comprising the step of processing the twisted conductors into a predetermined shape using a forming jig,
The method for connecting insulated wires according to claim 2, wherein the conductor processed into a predetermined shape is ultrasonically bonded in the step of ultrasonic bonding.

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