JP7107641B2 - Wiring material, method for manufacturing wiring material, and connection structure of wiring material - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wiring member, a method for manufacturing the wiring member, and a connection structure for the wiring member.

For example, in a rear battery vehicle, a long battery cable is required to carry power from the rear to the front. Round or flat thick electric wires for automobiles are generally used as battery cables. In many of these electric wire manufacturing methods for thick electric wires, an insulating coating (polyvinyl chloride or the like) is extruded on a conductor (copper strands twisted together) as a wiring material. In the extrusion molding of the insulating coating, the insulating material is melted by heating and extruded from a die together with the linear conductor to coat the outer circumference of the conductor with the insulating material. Therefore, it is a necessary condition for the extrusion molding of the insulating coating that the conductor is twisted and soft, or if it is hard, there is no bending.

As a method for manufacturing an insulated conductor, a method for manufacturing an electric conductor made into a thin plate using an insulating pottery insert in Patent Document 1, a method for manufacturing an oxide superconducting wire in Patent Document 2, and the like are known. .

JP-A-58-142708 JP-A-2000-268649

By the way, when wiring materials such as battery cables in the vehicle interior, it is required to route them along the body panel and to reduce the thickness of the cables in accordance with the need to expand the living space in the vehicle interior. In order to route the wiring material along the body panel, it is necessary to bend the wiring material according to the shape of the body panel.
However, it is difficult to bend the thick electric wire according to the shape of the body panel. In addition, it is difficult to extrude an insulating coating on a hard conductor such as a busbar that is bent along the body panel. Therefore, there is a demand for a wiring material in which an insulating coating is formed on a thin, bent conductor that can be laid along a body panel.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wiring material that can be made lighter and thinner than conventional electric wires and that can reduce the wiring space, a method for manufacturing the wiring material, and wiring. To provide a connection structure for materials.

The above objects of the present invention are achieved by the following configurations.
(1) A plurality of flat conductors stacked in the plate thickness direction, an insulating sheet material interposed between the adjacent flat conductors to electrically insulate the flat conductors, and the insulating sheet material. an insulating layer formed around the plurality of flat conductors sandwiched and stacked; a shield layer covering the periphery of the plurality of flat conductors covered with the insulating layer; and a shield layer provided outside the shield layer. and another insulating layer , wherein each of the plurality of flat conductors exposes only a pair of connection portions located at both ends in the longitudinal direction of the plurality of flat conductors, and The plurality of connection portions positioned at one end in the longitudinal direction are offset in the width direction of the flat conductor so as not to overlap each other when viewed in the plate thickness direction, and the connection portions are offset in the plate thickness direction. are arranged so that the position of each of the connecting portions in the width direction moves from one side to the other side in the width direction as the position of the plate moves from one side to the other side in the plate thickness direction, and the plurality of flat The plurality of connection portions positioned at the other end portion in the longitudinal direction of the shaped conductor are offset in the width direction so as not to overlap each other when viewed in the plate thickness direction, and the plate thickness of each connection portion is It is arranged so that the position of each of the connecting portions in the width direction moves from the other side to the one side in the width direction as the direction position moves from the one side to the other side in the plate thickness direction. A wiring material characterized by being

According to the wiring member having the configuration of (1) above, flat conductors are used for the wiring member, an insulating sheet material is interposed between the plurality of flat conductors, and the flat conductors are arranged in the plate thickness direction. By stacking, it is possible to configure a wiring material for multiple circuits while suppressing the height compared to conventional thick electric wires. In this case, it is not necessary to arrange a plurality of flat conductors in a direction perpendicular to the plate thickness direction, unlike conventional thick electric wires, so it is possible to suppress the expansion of the wiring space in the width direction of the wiring material. can.

Furthermore, according to the wiring member having the configuration ( 1 ) above, it is possible to suppress the emission of noise and prevent the influence of external noise.

(2) an insulating step of interposing an insulating sheet material between adjacent flat conductors among the plurality of flat conductors so that the plurality of flat conductors are electrically insulated from each other; a lamination step of laminating a flat conductor together with the insulating sheet material in a plate thickness direction; an insulating layer forming step of forming an insulating layer around the laminated flat conductors; and a plurality of flat conductors covered with the insulating layer. and another insulating layer forming step of providing another insulating layer outside the shield layer , wherein each of the plurality of flat conductors , only a pair of connecting portions located at both ends in the longitudinal direction of the flat conductor are exposed, and the plurality of connecting portions located at one end of the plurality of flat conductors in the longitudinal direction are The flat conductors are offset in the width direction so that they do not overlap each other when entwined, and as the positions of the connection portions in the plate thickness direction move from one side to the other side in the plate thickness direction, The plurality of connecting portions arranged so that the positions of the connecting portions in the width direction move from one side to the other side in the width direction, and positioned at the other ends in the longitudinal direction of the plurality of flat conductors , offset in the width direction so as not to overlap each other when viewed from the thickness direction, and positions of the connection portions in the thickness direction move from the one side to the other side in the thickness direction. A method for manufacturing a wiring member, wherein the position of each of the connection portions in the width direction moves from the other side in the width direction to the one side in the width direction .

According to the method of manufacturing the wiring member having the configuration ( 2 ), when a plurality of flat conductors are laminated in the plate thickness direction, an insulating sheet material is interposed between adjacent flat conductors to electrically insulate them. Therefore, it is possible to easily and reliably insulate the flat conductors.
Furthermore, according to the method of manufacturing the wiring member having the configuration (2), after forming the insulating layer around the plurality of flat conductors laminated with the insulating sheet material interposed therebetween, the insulating layer is made conductive A shield layer is formed by covering with a braided wire, foil material, or the like. Furthermore, by providing an insulating layer on the outer side, it is possible to easily manufacture a wiring member having a shielding function using the same equipment.

( 3 ) The method for manufacturing a wiring member according to ( 2 ) above, characterized by including a bending step of bending the plurality of laminated flat conductors into a predetermined shape before forming the insulating layer.

According to the wiring member manufacturing method having the configuration ( 3 ) above, the plurality of laminated flat conductors are bent in advance into a shape or the like along the body panel. In other words, a plurality of flat conductors laminated by interposing a flexible insulating sheet material can be collectively bent into a shape that conforms to a body panel or the like. The bent flat conductors are further covered with an insulating layer. In general, the surface of a body panel such as a floor panel along which a wiring member is laid has a complex uneven surface due to cross members, reinforcing ribs, and the like. When a thick electric wire is routed along this body panel, the thick electric wire is arranged on the convex portion. Therefore, the space between the body panel and, for example, the interior material provided thereon must be at least as large as the accommodation height of the thick wires. In addition, since it is difficult to bend the thick electric wire along the convex portion, the height of the interior material cannot be lowered even in the concave portion due to the restrictions on the position of the thick electric wire. On the other hand, in the wiring member of this configuration, since a plurality of flat conductors laminated with insulating sheet materials interposed therebetween are bent, they can be easily processed into a shape that conforms to the uneven surface of a complex body panel or the like. becomes possible. As a result, in the recess, restrictions such as a thick electric wire that cannot be bent are eliminated, and the height of the interior material can be reduced. Further, an insulating layer is formed by, for example, powder coating on the surface of the wiring member, which is formed by laminating and bending the plurality of flat conductors with insulating sheet materials interposed therebetween. Powder coating can form an insulating layer with a thickness of, for example, 0.1 to 0.2 mm, whereas the insulating layer in conventional extrusion has a thickness of 1 to 2 mm. As a result, the wiring material having the above configuration can reduce the wiring space, and for example, the distance between the body panel and the interior material can be reduced.

(4) In the plurality of wiring members according to (1) above, the connecting portions where the connecting portions of the plurality of flat conductors are electrically connected to each other have an installation height between the connecting portions A connection structure for wiring members, characterized in that a spacer is interposed to absorb a gap due to a difference in thickness.

According to the connection structure for wiring members having the configuration ( 4 ) above, even when there is a difference in installation height between the installation locations of the plurality of wiring members to be connected, the connection portions of the flat conductors are connected. By inserting the spacer in the connecting portion, it is possible to absorb the gap due to the difference in installation height between the two connecting portions and secure the contact area, thereby ensuring the connection reliability.

(5) In the plurality of wiring members according to (1) above, the connecting portions where the connecting portions of the plurality of flat conductors are electrically connected to each other have an installation height between the connecting portions A connection structure for wiring members, wherein a bent portion for absorbing a gap due to a difference in thickness is formed in each of the connection portions of at least one of the flat conductors.

According to the wiring member connection structure having the configuration ( 5 ) above, even if there is a difference in installation height at each installation location of the plurality of wiring members to be connected, the connecting portion of at least one of the flat conductors By forming the bent portion, it is possible to absorb the gap due to the difference in installation height between the two connection portions and secure the contact area, thereby ensuring the connection reliability.

(6) Between each connection portion of the plurality of flat conductors in the wiring member according to (1) above and each connection piece of the branch connection member electrically connected to each connection portion is a connection structure for wiring members, characterized in that a spacer is interposed to absorb a gap due to a difference in installation height between both members.

According to the wiring member connection structure having the configuration ( 6 ) above, even if there is a difference in installation height between the installation location of the branch connection member and the installation location of the wiring member, the connection piece and the connection portion By inserting the spacer between the two members, it is possible to absorb the gap due to the difference in installation height between the two members, secure the contact area, and secure the connection reliability.

(7) At least one of the connection portions of the plurality of flat conductors in the wiring member according to (1) above and the connection pieces of the branch connection members electrically connected to the connection portions. is formed with a bent portion for absorbing a gap due to a difference in installation height between both members.

According to the wiring member connection structure having the above configuration ( 7 ), even if there is a difference in installation height between the installation location of the branch connection member and the installation location of the wiring member, the connection piece and the connection portion By forming a bent portion on at least one side, it is possible to absorb the gap due to the difference in installation height between the two members, to secure the contact area, and to secure the connection reliability.

( 8 ) A connection structure for cable members, wherein the branch connection member according to ( 6 ) or ( 7 ) is accommodated in an insulating branch box.

The wiring material according to the present invention can be made lighter and thinner than conventional electric wires, and can reduce the wiring space.
According to the wiring material manufacturing method of the present invention, the insulating layer is formed on the wiring material that is thinner than the conventional extruded coated wire and is bent along the body panel or the like. becomes possible.
According to the wiring member connection structure according to the present invention, it is possible to absorb the gap due to the difference in the installation height between the two members, secure the contact area, and secure the connection reliability.

The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the following detailed description of the invention (hereinafter referred to as "embodiment") with reference to the accompanying drawings. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole perspective view of the wiring material which concerns on 1st Embodiment of this invention. FIG. 2 is a cross-sectional view of the wiring material shown in FIG. 1 taken along line II-II. It is a front view of the left end part in the wiring material shown in FIG. It is a top view of the left end part in the wiring material shown in FIG. It is a cross-sectional view of the wiring material which concerns on 2nd Embodiment of this invention. It is a whole perspective view of the wiring material which concerns on 3rd Embodiment of this invention. It is a whole perspective view which shows the wiring material based on the modification of 3rd Embodiment of this invention. FIG. 10 is a perspective view showing an example of wiring in a vehicle using multiple types of wiring members; FIG. 7 is a process chart showing the procedure of the method for manufacturing the wiring member shown in FIG. 6; It is process drawing showing the procedure of the electrostatic coating method. It is a process drawing showing the procedure of the fluidized immersion method. FIG. 11 is a perspective view showing an example of wiring in a vehicle using a thick electric wire; (a), (b) is a perspective view showing the 1st wiring material and the 2nd wiring material which divided|segmented and comprised the wiring material shown in FIG. FIG. 14 is a perspective view showing a connecting portion of the first wiring member and the second wiring member shown in FIG. 13 having the wiring member connection structure according to the fourth embodiment of the present invention; FIG. 15 is a cross-sectional view of a main part showing a connecting portion between the wiring members shown in FIG. 14; FIG. 11 is a perspective view showing a connecting portion of a first wiring member and a second wiring member having a wiring member connection structure according to a fifth embodiment of the present invention. FIG. 17 is a cross-sectional view of a main part showing a connecting portion between the wiring members shown in FIG. 16; FIG. 2 is an external perspective view of a branch box in which a branch connection member for electrically connecting a plurality of wiring members is accommodated; FIG. 19 is a perspective view of a branch connection member and a wiring member accommodated in the branch box shown in FIG. 18 for explaining a wiring member connection structure according to a sixth embodiment of the present invention; FIG. 20 is a cross-sectional view of a main part showing a connection portion between the connection portion and the connection piece shown in FIG. 19; FIG. 20 is a perspective view of a wiring member and a branch connection member having a connecting portion having a different configuration from that of the wiring member shown in FIG. 19 for explaining the connection structure of the wiring member according to the seventh embodiment of the present invention; . FIG. 22 is a cross-sectional view of a main part showing a connecting portion between the connecting portion and the connecting piece shown in FIG. 21;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall perspective view of a vehicle wiring member 100 according to a first embodiment of the present invention, and FIG. 2 is a II-II cross-sectional view of the vehicle wiring member 100 shown in FIG.
A vehicle wiring member 100 according to the first embodiment is a wiring member having a plurality of flat conductors 11A to 11D (see FIG. 2), an insulating sheet member 13, and an insulating layer 15.

A plurality of flat conductors 11A to 11D according to the first embodiment are laminated in the plate thickness direction. Various conductive materials such as copper alloys and aluminum alloys can be used for the flat conductors 11A to 11D. In this embodiment, a flat conductor made of an aluminum alloy will be described as an example.

The insulating sheet material 13 is interposed between adjacent flat conductors to electrically insulate the flat conductors. As the insulating sheet material 13, a flexible resin sheet material such as PET (polyethylene terephthalate) or PEN (polyethylene naphthalate) can be used. These insulating sheet materials 13 are provided over the entire front and back surfaces of the flat conductors 11A to 11D except for the connection portions 17 thereof. Therefore, in the case of the rectangular flat conductors 11A to 11D, the end faces on the four sides do not have to be covered with the insulating sheet material 13. FIG. The end faces on these four sides are covered with an insulating layer 15 . Therefore, only the connecting portions 17 of the laminated flat conductors 11A to 11D are exposed.

The insulating layer 15 is formed around the plurality of flat conductors 11A to 11D laminated with the insulating sheet material 13 interposed therebetween. This insulating layer 15 is formed by powder coating, which will be described later, for example.

The vehicle wiring member 100 according to the first embodiment is capable of supporting multiple circuits by stacking a plurality of flat conductors 11A to 11D with an insulating sheet member 13 interposed therebetween. In this embodiment, the vehicle wiring member 100 made up of four layers of flat conductors 11A to 11D is exemplified, but the number of layers (number of sheets) is not limited to this.

The connecting portions 17 of the respective flat conductors 11A to 11D can be formed with widths obtained by dividing the total width of the vehicle wiring member 100 by the number of layers. As illustrated, the connection portion 17 is provided with a bolt fixing hole 19 .
When the vehicle wiring member 100 according to the first embodiment is used, for example, as a power cable, as shown in FIG. The wiring member 100 for a vehicle can be configured by laminating the flat conductors 11A to 11D in the order of the plus of 12V and the minus of 12V. In this case, adjacent layers are preferably of the same polarity. In the vehicle wiring member 100 of the illustrated example, "48V plus" and "12V plus" are adjacent to each other on the second and third layers. The vehicle wiring member 100 in which multiple circuits are laminated can improve the noise resistance performance by arranging the same poles adjacent to each other.

As shown in FIG. 2, the vehicle wiring member 100 uses flat conductors 11A to 11D made of an aluminum alloy having a thickness (t) of 0.8 mm and a width (W1) of 70 mm, for example. Therefore, each of the aluminum plate flat conductors 11A to 11D corresponds to an electric wire of 56 sq. In addition, the laminated four-layered flat conductors 11A to 11D are interposed between adjacent flat conductors with an insulating sheet material 13 having a thickness (t1) of, for example, 0.2 mm, and a thickness (t2) of 0. It is surrounded by an insulating layer 15 of 0.2 mm. Therefore, the distance between laminated conductors is 0.2 mm. Therefore, the total width (W) of the vehicle wiring member 100 is 70.4 mm, and the total thickness (T) is 4.2 mm. Therefore, the thickness of the vehicle wiring member 100 can be reduced to half or less compared to the case of using a 50 sq aluminum electric wire with a standard finished outer diameter of 12.0 mm.

3 and 4 are a front view and a plan view of the left end of the wiring member 100. FIG.
As shown in FIG. 3, in the vehicle wiring member 100, the width (w) of each connection portion 17 of the flat conductors 11A to 11D is 16.0 mm. Moreover, the interval (d) between the adjacent connecting portions is set to 2.0 mm. The width (w) of the connection portion 17 is designed to prevent interference between the outer diameter of the tool used to fasten the nut to the bolt inserted through the bolt fixing hole 19 drilled in the connection portion 17 and the fastened nut. It is the minimum dimension necessary to avoid it.

Here, the plate thickness (t) of each of the flat conductors 11A to 11D in the vehicle wiring member 100 is the number of circuits (n), and the width of the connection portion 17 at both ends of each of the flat conductors 11A to 11D (w ), the interval between the adjacent connecting portions 17 is (d), and the cross-sectional area (electric wire sq) of the required wiring material is (S), the following equation (A) can be used.
t≧S/(n×w+d(n−1)) (A)
That is, according to the above formula (A), according to the electric wire sq of the conventional electric wire (corresponding to the required cross-sectional area (S) of each wiring member), the plate of each of the flat conductors 11A to 11D required The thickness (t) can be calculated, and the vehicle wiring member 100 can be easily replaced from conventional electric wires.

FIG. 5 is a cross-sectional view of a vehicle wiring member 200 according to a second embodiment of the present invention.
As shown in FIG. 5, the vehicle wiring member 200 includes a shield layer 16 around a plurality of flat conductors 11A to 11D covered with an insulating layer 15. As shown in FIG. As the shield layer 16, for example, a braided wire or a foil material can be used. The outer circumference of the shield layer 16 is further covered with an insulating layer 15 . According to the vehicle wiring member 200 provided with the shield layer 16, the emission of noise can be suppressed and the influence of external noise can be prevented.

FIG. 6 is an overall perspective view of a vehicle wiring member 300 according to a third embodiment of the present invention.
A vehicle wiring member 300 according to the third embodiment is bent into a shape that conforms to, for example, a vehicle floor panel (body panel) 21 (see FIG. 8). As will be described later, the vehicle wiring member 300 includes a plurality of flat conductors 11A to 11D laminated with a flexible insulating sheet material 13 interposed therebetween before forming the insulating layer 15 into a predetermined shape. can be folded into The vehicle wiring member 300 is configured by forming an insulating layer 15 around the plurality of bent flat conductors 11A to 11D.

The vehicle wiring member 300 is formed with a concave bent portion 22 that straddles the tunnel portion 24 of the floor panel 21 . In this vehicle wiring member 300, four layers (four sheets) of flat conductors 11A to 11D laminated with an insulating sheet material 13 interposed are covered with an insulating layer 15 formed by powder coating. It has one connecting portion 17 .

FIG. 7 is an overall perspective view showing a vehicle wiring member 400 according to a modification of the third embodiment of the invention.
As with the vehicle wiring member 300 , the vehicle wiring member 400 includes a plurality of elongated layers laminated with flexible insulating sheet members 13 interposed before the insulating layer 15 is formed. A flat conductor is bent into a predetermined shape. The vehicle wiring member 400 is configured by forming the insulating layer 15 around the bent long flat conductors.

The vehicle wiring member 400 is formed with a plurality of bent portions 29, 31, 33, etc. along the floor panel 21, as well as a plurality of concave bent portions 35, 37 straddling the cross members of the floor panel 21. there is In this vehicle wiring member 400, four layers (four sheets) of long flat conductors laminated with insulating sheet materials 13 interposed are covered with an insulating layer 15 by powder coating. It has one connecting portion 17 .

FIG. 8 is a perspective view showing an example of wiring in a vehicle using multiple types of vehicle wiring members.
When used as a power supply cable, for example, the pair of vehicle wiring members 400 extend along the floor panel 21 across the front cross member 23 on the front (Fr) side and the rear cross member 25 on the rear (Rr) side of the vehicle. It is routed in the longitudinal direction of the vehicle. In addition, the vehicle wiring member 300 is routed in the lateral direction of the vehicle along the floor panel 21 across the tunnel portion 24 of the vehicle, and is electrically connected to the pair of vehicle wiring members 400 via the branch box 27. Connected. Furthermore, the vehicle wiring member 100 is electrically connected to the vehicle wiring member 400 via the branch box 27 .

These vehicle wiring members 100, 300, and 400, which are wired along the floor panel 21 over the front (Fr) side and the rear (Rr) side of the vehicle and are interconnected, connect the vehicle battery to the vehicle. Power can be supplied to various devices.

These vehicle wiring members 100, 300, and 400 are composed of a plurality of flat conductors laminated with insulating sheet members 13 interposed therebetween, and are covered with a thin powder-coated insulating layer 15. It can be made thinner and lighter than an electric wire. By reducing the thickness of these vehicle wiring members 100, 300, and 400, the vehicle wiring space can be reduced. As a result, the vehicle wiring members 100, 300, and 400 can be routed even in a space-saving portion (for example, a gap between the floor panel 21 and the floor mat, etc.) where the wiring space is desired to be minimized due to the need to expand the living space in the vehicle interior. becomes possible.

Next, a method for manufacturing the vehicle wiring member according to each of the above embodiments will be described.
FIG. 9 is a process diagram showing the steps of the method for manufacturing the vehicle wiring member 300 shown in FIG.
The method for manufacturing the vehicle wiring member 300 according to the present embodiment includes a lamination step of laminating a plurality of flat conductors 11A to 11D in the plate thickness direction, and an insulating sheet material 13 interposed between adjacent flat conductors. and an insulating layer forming step of forming an insulating layer 15 around the laminated flat conductors 11A to 11D.

In the lamination step of laminating a plurality of flat conductors 11A to 11D in the plate thickness direction, as shown in FIG. . The plurality of flat conductors 11A to 11D are electrically insulated by interposing an insulating sheet material 13 between adjacent flat conductors before bending, and the laminated flat conductor shown in FIG. 43.

Before the insulating layer 15 is formed on the outer circumference of the laminated flat conductor 43, the laminated flat conductor 43 is bent into a shape along the vehicle floor panel 21 and the like in a bending process, as shown in FIG. 9(c). In particular, in the bending of the laminated flat conductor 43, the deformation is slightly restored due to springback after processing, so this should be taken into account.

After the bending process has been completed, the laminated flat conductor 43 is powder-coated on the outer periphery, thereby forming a vehicle wiring member 300 having an insulating layer 15 formed on the surface thereof, as shown in FIG. 9(d). becomes.
At this time, the method for manufacturing the vehicle wiring member 300 according to the present embodiment can include a masking process before the painting process. In the masking process, the surfaces of the portions to be the connecting portions 17 at both ends of the laminated flat conductor 43, for example, are masked by using a masking tape 45 or the like (see FIG. 9C). At both ends of the masked laminated flat conductor 43, bolt fixing holes 19 are bored in advance by drilling. The insulating layer 15 is not formed on both ends of the masked laminated flat conductor 43 . Therefore, the exposed portions at both ends of the laminated flat conductor 43 can be used as connection terminals. The connection terminal can be directly conductively connected to a mating harness, a battery electrode, an alternator terminal, or the like by fastening bolts using the bolt fixing holes 19 described above.

An insulating layer 15 is formed on the surface of the bent laminated flat conductor 43 by powder-coating an insulating resin material. There are mainly two types of powder coating: an "electrostatic coating method (spray coating)" and a "fluidized immersion method (immersion coating)".

FIG. 10 is a process chart showing the procedure of the "electrostatic coating method".
The "electrostatic coating method" is a method in which the paint is charged with a spray gun 48 and applied to a grounded object using static electricity.
In the "electrostatic coating method" shown in FIG.

Next, in the powder coating booth 51 , the powder coating from the powder coating supply tank 53 is sprayed by compressed air from the compressor 55 . At this time, a high voltage generator 57 is connected to the spray gun 48 to charge the paint. On the other hand, by grounding the laminated flat conductor 43, the surface of the laminated flat conductor 43 is covered with a powder coating film. A recovery device 59 is connected to the powder coating booth 51 .

After the application of the powder coating, it is heated in a baking drying oven 61 to form a coating film, and after cooling, a coated laminated flat conductor 63 is obtained. The coated laminated flat conductor 63 becomes the vehicle wiring member 300 through post-processing such as removal of the masking tape 45 . Although it is difficult to control the film thickness by the "fluidization dipping method" to be described later, the "electrostatic spray method" makes it easy to control the coating film with a thin film of about 50 microns.

The thermosetting paint used in the "electrostatic spray method" undergoes a chemical change (crosslinking) by applying heat, changing its properties. Since various performances can be added by cross-linking reaction, the paint can be selected according to the application. Base resins used are generally polyester resins, acrylic resins, epoxy resins, hybrid (epoxy/polyester) resins, and the like.

FIG. 11 is a process diagram showing the procedure of the "fluidization immersion method".
In the “fluidization dipping method”, first, the laminated flat conductor 43 is washed in the pretreatment bath 47 and preheated in the preheating furnace 65 .

Next, in the fluidized bath 67, immersion is performed. For the immersion, a perforated plate is arranged at the bottom of the fluidized immersion bath 67, and compressed air 69 is sent from the perforated plate to flow the paint, and the preheated laminated flat conductor 43 is immersed in the flowing paint. do. The paint in the fluidized bath 67 is fused to the laminated flat conductor 43 by heat to form a thick coating film.

After that, it may be passed through a post-heating bath 71 for improving smoothness. Thus, a coated laminated flat conductor 63 is obtained. The coated laminated flat conductor 63 becomes the vehicle wiring member 300 through post-processing such as removal of the masking tape 45 . In the "fluidized dip coating method", a film thickness of usually 200 to 500 microns can be applied.

Resins such as vinyl chloride, polyethylene, and nylon can be mainly used for the thermoplastic powder coating used in the "fluidization dipping method". Thermoplastic paints are characterized by the fact that they soften and change shape when heat is applied, and the shape stabilizes when cooled. Thermoplastic powder coatings do not undergo chemical changes due to heat, so when heat is applied again, they repeatedly soften and change shape. Therefore, it is not a baking process like a thermosetting paint.

The method of manufacturing the vehicle wiring member according to the present embodiment includes a shield layer forming step of forming a shield layer around the powder coated laminated flat conductor 63. good too. In this shield layer forming step, the periphery of the coated laminated flat conductor 63 is covered with a braided wire or foil material as a shield layer. After that, if necessary, the outer circumference is further covered with an insulating layer 15 formed by powder coating. According to the vehicle wiring material provided with the shield layer, it is possible to suppress the emission of noise and prevent the influence of external noise.

Next, the operation of the configuration described above will be described.
In the vehicle wiring members 100, 200, 300, and 400 according to the above embodiments, the flat conductors 11A to 11D are used as the wiring members, and the insulating sheet material 13 is interposed between the plurality of flat conductors. By stacking the flat conductors 11A to 11D in the plate thickness direction, it is possible to configure a vehicle wiring member for multiple circuits while suppressing the height compared to conventional thick wires. In this case, the plurality of flat conductors 11A to 11D do not have to be arranged in the direction orthogonal to the plate thickness direction, unlike conventional thick electric wires, so that the wiring space in the width direction of the wiring material is expanded. can be suppressed.

Moreover, according to the wiring member 200 provided with the shield layer 16, the emission of noise can be suppressed and the influence of external noise can be prevented.

In the method of manufacturing the vehicle wiring members 100, 200, 300, and 400 according to the present embodiment, when the plurality of flat conductors 11A to 11D are laminated in the plate thickness direction, the insulating sheet material 13 is placed between the adjacent flat conductors. is interposed to electrically insulate, the flat conductors can be easily and reliably insulated.

Further, in the method of manufacturing the vehicle wiring members 300 and 400, the plurality of laminated flat conductors 11A to 11D are bent in advance into a shape along the floor panel . That is, the plurality of flat conductors 11A to 11D (that is, the laminated flat conductor 43) laminated by interposing the flexible insulating sheet material 13 are collectively bent into a shape along the floor panel 21. can be processed. The periphery of the bent laminated flat conductor 43 is covered with the insulating layer 15 .

In general, the surface of the floor panel 21 along which the wiring material is laid has a complicated uneven surface due to the front cross member 23, the rear cross member 25, and the like.
For example, as shown in FIG. 12, in order to connect the front alternator 41 and the like to the fuse box 39 connected to the rear battery 38, when the floor panel 21 is wired along with the thick electric wire 73, the front cross The thick electric wire 73 is arranged on the convex portions of the member 23, the rear cross member 25, and the like. Therefore, the space between the floor panel 21 and, for example, the interior material provided thereon must be at least as large as the accommodation height of the thick electric wire 73 . In addition, since it is difficult to bend the thick electric wire 73 along the convex portions of the front cross member 23 and the rear cross member 25, the position of the thick electric wire 73 is restricted even in the concave portion, and the height of the interior material is restricted. cannot be lowered.

On the other hand, in the vehicle wiring members 300 and 400 configured as described above, the plurality of flat conductors 11A to 11D (laminated flat conductors 43) laminated with the insulating sheet material 13 interposed therebetween are bent in advance. It becomes possible to easily process the shape along the uneven surface of the complicated floor panel 21 . As a result, restrictions such as the thick electric wire 73 that cannot be bent in the recess are eliminated, and the height of the interior material can be reduced (see FIG. 8). An insulating layer 15 is formed by, for example, powder coating on the surface of the wiring member obtained by laminating and bending the plurality of flat conductors A to 11D with the insulating sheet material 13 interposed therebetween. Powder coating can form the insulating layer 15 with a thickness of, for example, 0.1 to 0.2 mm, whereas the insulating layer 15 formed by conventional extrusion has a thickness of 1 to 2 mm. As a result, the vehicle wiring members 300 and 400 can reduce the vehicle wiring space, and for example, the distance between the floor panel 21 and the interior material can be reduced.

Further, in the method for manufacturing the vehicle wiring member 200, after the insulating layer 15 is formed around the plurality of flat conductors 11A to 11D laminated with the insulating sheet material 13 interposed therebetween, the insulating layer 15 is surrounded by a shield. By covering with the layer 16 and further providing the insulating layer 15 by powder coating on the outer side if necessary, the vehicle wiring material 200 having a shielding function can be easily manufactured using the same equipment (for example, powder coating equipment). can be manufactured to

Therefore, according to the vehicle wiring members 100, 200, 300, and 400 according to the above embodiments, the weight and thickness can be reduced as compared with the conventional thick electric wire 73, and the wiring space can be reduced.
In addition, according to the method of manufacturing the vehicle wiring members 100, 200, 300, and 400 according to the above-described embodiments, the wires are thinner than the conventional extruded coated wires, and are bent along the floor panel 21. It becomes possible to form the insulating layer 15 on the wiring material.

The present invention is not limited to the above-described embodiments, and it is also possible for those skilled in the art to combine each configuration of the embodiments with each other, modify and apply based on the description of the specification and well-known technology. It is intended by the invention and falls within the scope for which protection is sought.

For example, the insulating layer formed around the flat conductor is not limited to the powder coating described above, and various forming methods such as a method of dipping in paint (dip coating) can be employed. In the above configuration example, the plurality of vehicle wiring members 100, 300, and 400 are electrically connected via the branch box 27. Needless to say, it is also possible to have a configuration in which it is routed to Furthermore, in the above-described embodiments, the vehicle wiring members 100, 200, 300, and 400 used for vehicle power cables have been described as wiring members, but the wiring members of the present invention are not limited thereto. , it goes without saying that it can be applied to various wiring materials.

13(a) and 13(b) are perspective views showing a first wiring member 410 and a second wiring member 430 which are configured by dividing the vehicle wiring member 400 shown in FIG. 7, and FIG. 14 is a perspective view showing a connecting portion 450 of a first wiring member 410 and a second wiring member 430 shown in FIG. 13 having a wiring member connection structure according to a fourth embodiment of the present invention; FIG.
The vehicle wiring member 400 is made with a structure that matches the installation location as described above. That is, the vehicle wiring member 400 has a highly rigid structure due to the laminated four layers (four sheets) of the flat conductors 11A to 11D. For this reason, for example, in the case of a length longer than half in the vehicle front-rear direction, such as the vehicle wiring member 400, the first wiring member 410 shown in FIG. and the second wiring member 430 shown in FIG. 3(b). In this case, it is necessary to electrically connect the first wiring member 410 and the second wiring member 430 at the connecting portion 450 . The components of the first wiring member 410 and the second wiring member 430 that are the same as those of the vehicle wiring member 400 are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 14, at the connecting portion 450 between the first wiring member 410 and the second wiring member 430, each connecting portion 17 of the flat conductors 11A to 11D of the first wiring member 410 bundled by the clamp 123 and each connection portion 17 of the flat conductors 11A to 11D of the second wiring member 430 bundled by the clamp 123, a spacer for absorbing a gap due to a difference in installation height between the connection portions 17. 420 are interposed, and both connecting portions 17 are fastened and fixed by bolts 452 and fixing nuts 451 .

That is, as shown in FIG. 15, the installation location (installation surface) of the first wiring member 410 installed on the mounting surface 500 of the vehicle body panel or the like and the installation location (installation surface) of the second wiring member 430 There may be a difference in installation height (step) between them. Even if the mounting surface 500 itself does not have a step, due to the assembly tolerance of the first wiring member 410 and the second wiring member 430, each connection portion 17 of the first wiring member 410 and the second wiring member A gap may occur between each connection portion 17 of 430 . If the connection portions 17 having such gaps are forcibly connected and fixed by bolting or the like, a sufficient contact area cannot be secured, resulting in a decrease in connection reliability or a thickness at the connection portion of the connection portions 17. A bending load in the vertical direction may cause deformation or damage.

Therefore, if there is a difference in installation height between the installation location of the first wiring member 410 installed on the mounting surface 500 such as a vehicle body panel and the installation location of the second wiring member 430, the first A spacer 420 having a predetermined thickness capable of absorbing a gap due to a difference in installation height between the wiring member 410 and the second wiring member 430 is interposed. By inserting the spacer 420, the contact area can be secured by absorbing the gap due to the difference in installation height between both wiring members. In addition, when the connecting portions 17 are connected and fixed by bolting, a bending load in the thickness direction is less likely to be applied to the connecting portions of the connecting portions 17, and deformation and damage can be prevented.

The spacer 420 is made of a rectangular plate-like conductive material, and has through holes 421 through which bolts 452 pass. Since the spacer 420 absorbs the gap due to the difference in installation height between both members, a plurality of types of spacers having different thicknesses are appropriately used.

FIG. 16 is a perspective view showing a connection portion 450A between a first wiring member 410A and a second wiring member 430 having a wiring member connection structure according to a fifth embodiment of the present invention, and FIG. It is a principal part sectional view which shows 450 A of connection parts of wiring materials.
As shown in FIG. 16, at the connection portion 450A between the first wiring member 410A and the second wiring member 430, each connection portion 17 of the flat conductors 11A to 11D of the first wiring member 410A bundled by the clamp 123 A bent portion 18 is formed in the second wiring member 430 to absorb a gap caused by a difference in installation height from the installation locations of the flat conductors 11A to 11D.

That is, as shown in FIG. 17, when there is a difference in installation height between the installation location of the first wiring member 410A installed on the mounting surface 500 and the installation location of the second wiring member 430, , so that each connection portion 17 of the first wiring member 410A absorbs the gap due to the difference in installation height and can come into surface contact with each connection portion 17 of the second wiring member 430, so that the crank shape is formed in advance according to the gap. A bent portion 18 is formed by bending each connection portion 17 of the first wiring member 410A.
Each connecting portion 17 of the first wiring member 410A is formed with the bent portion 18, so that the gap between the connecting portion 17 of the second wiring member 430 can be absorbed and a contact area can be secured. In addition, when the connecting portions 17 are connected and fixed by bolting, a bending load in the thickness direction is less likely to be applied to the connecting portions of the connecting portions 17, and deformation and damage can be prevented.

In addition, since each connecting portion 17 is bent into a crank shape by the bending portion 18, it is possible to release the stress from the linear direction in which the connected first wiring member 410A extends, thereby preventing damage to the connecting portion 17. can be suppressed.
The bent portions 18 are not limited to the connecting portions 17 of the first wiring member 410A, and may be formed by bending the connecting portions 17 of the second wiring member 430. Both of the connecting portions 17 of the wiring member 430 may be bent. Further, each connecting portion 17 of the first wiring member 410A may be connected to each connecting portion 17 of the second wiring member 430 by welding or soldering.
Further, these first wiring members 410, 410A and second wiring member 430 are a plurality of flat conductors 11A to 11D covered with an insulating layer 15 like the vehicle wiring member 200 shown in FIG. A shield layer 16 may be provided around the perimeter.

FIG. 18 is an external perspective view of a branch box 511 housing a branch connection member 513 for electrically connecting a plurality of vehicle wiring members 100, 300, 400, and FIG. FIG. 20 is a perspective view of the branch connection member 513 and the vehicle wiring member 400 housed in the branch box 11 shown in FIG. 18 for explaining the connection structure of the cable members, and FIG. FIG. 11 is a cross-sectional view of a main part showing a connecting portion 450B of first to fourth connecting pieces 535, 537, 539, 541;
The branch box 511 is an insulating housing case that houses a branch connection member 513 that electrically connects the vehicle wiring members 100, 300, and 400 according to this embodiment. The branch box 511 has a housing box 515 and a lid case 517 , and the housing box 515 and the lid case 517 cover the branch connection member 513 . The branch box 511 is formed of a substantially flat hexahedron. A total of four connection openings 519 are formed in each side of the branch box 511 so as to protrude from each side. Each connection opening 519 has a plurality (four in the illustrated example) of connection ports 521 . At each connection port 521, first to fourth connection pieces 535, 537, 539, 541, which will be described later, are arranged. Each connection piece arranged in each connection port 521 is connected to each flat conductor (conductor) 11A to 11D of the vehicle wiring member 400, which will be described later.

As shown in FIG. 19, the branch connection member 513 accommodated in the branch box 511 is formed by laminating a plurality of flat plate portions 523A to 523D made of a conductive material. The number of laminated flat plate portions 523A to 523D is the number of flat conductors 11A to 11D of the vehicle wiring member 400 to be connected. In this embodiment, since the number of flat conductors 11A to 11D of the vehicle wiring member 400, which will be described later, is four, the number of flat plate portions 523A to 523D is four.

In the present embodiment, each of the flat plate portions 523A to 523D, which is square in plan view, has first to fourth connections projecting side by side from the outer peripheral edge 525 of each of the stacked flat plate portions 523A to 523D so as not to overlap in the stacking direction. It has strips 535,537,539,541. These first to fourth connection pieces 535, 537, 539, 541 are connected to the flat conductors 11A to 11D of the vehicle wiring member 400, respectively. The first to fourth connection pieces 535, 537, 539, 541 form a plurality of groups of connection portions. The branch connection member 513 of the illustrated example has a first group of connection portions 527, a second group of connection portions 529, a third group of connection portions 531, and a fourth group of connection portions 533 on each side. , are provided. First to fourth connection pieces 535, 537, 539, 541 are arranged in the connection portions 527, 529, 531, 533 of the first to fourth groups, respectively. Each connecting piece is provided with a bolt fixing hole 543 for connecting the flat conductors 11A to 11D of the vehicle wiring member 400 by bolting.

A stud bolt 549 is implanted in the bottom of each connection port 521 in the connection opening 519 of the housing box 515 . The stud bolts 549 are inserted through the bolt fixing holes 543 of the first to fourth connecting pieces 535, 537, 539, 541, respectively. A fixing nut 551 is screwed onto the stud bolt 549 passing through the bolt fixing hole 543 . As a result, the flat conductors 11A to 11D having the bolt fixing holes 19 can be fastened to the first to fourth connection pieces 535, 537, 539 and 541, respectively. At the same time, the stud bolt 549 also serves to fix the branch connection member 513 to the housing box 515 . In this way, the branch connection member 513 fixed to the housing box 515 is housed in the branch box 511 and mostly covered by fixing the lid case 517 to the housing box 515 with the case fixing screw 553. .

The branch connection member 513 has an insulating layer 555 between the plurality of flat plate portions 523A to 523D for electrically insulating the flat plate portions. The insulating layer 555 can be formed by powder coating, for example, on at least one of the front surface and the back surface of each of the flat plate portions 523A to 523D.

Then, as shown in FIG. 19, each connecting portion 17 of the flat conductors 11A to 11D of the vehicle wiring member 400 bundled by the clamp 123 and the outer peripheral edge 525 of each of the flat plate portions 523A to 523D are overlapped in the stacking direction. Spacers 420 are interposed between the first to fourth connection pieces 535, 537, 539, 541 projecting side by side so as not to It is

That is, as shown in FIG. 20, at the connection portion 450 between the vehicle wiring member 400 and the branch connection member 513, each connection portion of the flat conductors 11A to 11D of the vehicle wiring member 400 bundled by the clamp 123 is connected. 17 and first to fourth connection pieces 535, 537, 539, 541 projecting horizontally from the outer peripheral edge 525 of each of the flat plate portions 523A to 523D so as not to overlap in the stacking direction. A spacer 420 is interposed to absorb the gap due to the difference in installation height.

Therefore, as shown in FIG. 20, a branch box 511 accommodates a branch connection member 513 in which a vehicle wiring member 400 is installed on an installation surface 500 such as a vehicle body panel, and a branch connection member 513 in which flat plate portions 523A to 523D are laminated. If there is a difference in installation height between the two members, a spacer 420 having a predetermined thickness is interposed to absorb the gap due to the difference in installation height between the two members. By inserting the spacer 420, the contact area can be secured by absorbing the gap due to the difference in installation height between the two members. In addition, when connecting and fixing, a bending load in the thickness direction is less likely to be applied to the connecting portion 17 and the connecting portions of the first to fourth connecting pieces 535, 537, 539, 541, and deformation and damage can be prevented. .

FIG. 21 shows a vehicle wiring member having a connection portion 17A having a configuration different from that of the vehicle wiring member 400 shown in FIG. 400A and a perspective view of the branch connection member 513, and FIG. 22 is a cross-sectional view of a main part showing a connection portion 450C between the connection portion 17A and the first to fourth connection pieces 535, 537, 539, 541 shown in FIG. .
As shown in FIG. 21, first to fourth connection pieces 535, 537, 539, and 541 are attached to the connection portions 17A of the flat conductors 11A to 11D of the vehicle wiring member 400A bundled by the clamp 123. A bent portion 18 is formed to absorb a gap due to a difference in installation height from the installation location.

That is, as shown in FIG. 22, there are the installation location of the vehicle wiring member 400A installed on the mounting surface 500 and the installation location of the branch box 511 accommodating the branch connection member 513 in which the flat plate portions 523A to 523D are laminated. If there is a difference in the installation height between and , a bent portion 18 is formed in advance in a crank shape according to the gap. By forming the bent portion 18, each connection portion 17A can absorb the gaps with respect to the first to fourth connection pieces 535, 537, 539, 541 and secure the contact area. In addition, when connecting and fixing, a bending load in the thickness direction is less likely to be applied to the connection portion 17A and the connection portions of the first to fourth connection pieces 535, 537, 539, and 541, and deformation and damage can be prevented. .

In addition, since each connecting portion 17A is bent in a crank shape by the bending portion 18, it becomes possible to release the stress from the straight line direction in which the connected vehicle wiring member 400A extends, thereby preventing damage to the connecting portion 17A. can be suppressed.
The bent portion 18 is not limited to the connection portion 17A, and may be formed by bending the first to fourth connection pieces 535, 537, 539, and 541. , 537, 539, 541 may be bent. Also, the connection portions 17A of the flat conductors 11A to 11D may be connected to the first to fourth connection pieces 535, 537, 539 and 541 by welding or soldering, respectively.

Here, the characteristics of the embodiments of the wiring member, the manufacturing method of the wiring member, and the connecting structure of the wiring member according to the present invention described above are briefly summarized in [1] to [10] below.
[1] A plurality of flat conductors (11A to 11D) laminated in the plate thickness direction,
an insulating sheet material (13) interposed between the adjacent flat conductors to electrically insulate the flat conductors;
A wiring member (vehicle wiring member 100, 200, 300) characterized by comprising an insulating layer (15) formed around the plurality of flat conductors laminated with the insulating sheet material interposed therebetween. , 400).
[2] The wiring member (vehicle wiring member 200) according to the above [1], further comprising a shield layer (16) covering the periphery of the plurality of flat conductors (11A to 11D).
[3] A lamination step of laminating a plurality of flat conductors (11A to 11D) in the plate thickness direction;
an insulating step of interposing an insulating sheet material (13) between the adjacent flat conductors to electrically insulate them;
an insulating layer forming step of forming an insulating layer (15) around the laminated flat conductors (11A to 11D);
A method for manufacturing a wiring member (vehicle wiring member 100, 200, 300, 400), comprising:
[4] The method according to [3], characterized by including a bending step of bending the laminated flat conductors (11A to 11D) into a predetermined shape before forming the insulating layer (15). A method for manufacturing a wiring member (vehicle wiring member 300, 400).
[5] The wiring material according to [3] or [4] above, characterized by including a shield layer forming step of forming a shield layer (16) around the plurality of flat conductors (11A to 11D). (200) production method.
[6] Each connection of the plurality of flat conductors (11A to 11D) in the plurality of wiring members (the first wiring member 410 and the second wiring member 430) according to the above [1] or [2] A spacer (420) is interposed in a connection portion (450) where the portions (17) are electrically connected to each other to absorb a gap due to a difference in installation height between the two connection portions. The connection structure of the wiring material.
[7] Each connection of the plurality of flat conductors (11A to 11D) in the plurality of wiring members (the first wiring member 410A and the second wiring member 430) according to the above [1] or [2] At the connection portion (450A) where the portions (17) are electrically connected to each other, at least one of the flat conductors is provided with a bent portion (18) for absorbing a gap due to a difference in installation height between the two connection portions. A wiring member connection structure, characterized in that it is formed at a connection portion of a wiring member.
[8] The connecting portion (17) of the plurality of flat conductors (11A to 11D) in the wiring member (vehicle wiring member 400) according to [1] or [2] above, and the connecting portion Between the connection pieces (first to fourth connection pieces 535, 537, 539, 541) of the branch connection member (513) to be electrically connected, a gap is provided due to the difference in installation height between both members. A connection structure for wiring members, characterized in that a spacer (420) for absorption is interposed.
[9] The connecting portion (17A) of the plurality of flat conductors (11A to 11D) in the wiring member (vehicle wiring member 400A) according to the above [1] or [2], and the connecting portion At least one of the connection pieces (first to fourth connection pieces 535, 537, 539, 541) of the branch connection member (513) to be electrically connected has a gap due to the difference in installation height between both members. A connection structure for wiring members, characterized in that a bent portion (18) is formed for absorbing the .
[10] A wiring member connection structure, wherein the branch connection member (513) according to the above [8] or [9] is accommodated in an insulating branch box (511).

11A to 11D... Flat conductor 13... Insulating sheet material 15... Insulating layer 16... Shield layer 100, 200, 300, 400... Vehicle wiring material (wiring material)

Claims (8)

a plurality of flat conductors laminated in the plate thickness direction;
an insulating sheet material interposed between the adjacent flat conductors to electrically insulate the flat conductors;
an insulating layer formed around the plurality of flat conductors stacked with the insulating sheet material sandwiched therebetween;
a shield layer covering the periphery of the plurality of flat conductors covered with the insulating layer;
another insulating layer provided outside the shield layer;
with
In each of the plurality of flat conductors, only a pair of connecting portions located at both ends in the longitudinal direction of the flat conductor are exposed;
The plurality of connection portions positioned at one end in the longitudinal direction of the plurality of flat conductors are offset in the width direction of the flat conductors so as not to overlap each other when viewed in the plate thickness direction, and As the position of each connection portion in the plate thickness direction moves from one side to the other side in the plate thickness direction, the position of each connection portion in the width direction moves from one side to the other side in the width direction. , is placed,
The plurality of connection portions positioned at the other ends in the longitudinal direction of the plurality of flat conductors are offset in the width direction so as not to overlap each other when viewed in the plate thickness direction, and each of the connection portions As the position in the plate thickness direction of moves from the one side in the plate thickness direction to the other side in the plate thickness direction, the position in the width direction of each connection portion moves from the other side in the width direction to the one side A wiring material characterized in that it is arranged in . an insulating step of interposing an insulating sheet material between adjacent flat conductors among the plurality of flat conductors so that the plurality of flat conductors are electrically insulated from each other;
A lamination step of laminating the plurality of flat conductors together with the insulating sheet material in a plate thickness direction;
an insulating layer forming step of forming an insulating layer around the plurality of stacked flat conductors;
a shield layer forming step of covering the periphery of the plurality of flat conductors covered with the insulating layer with a shield layer;
another insulating layer forming step of providing another insulating layer outside the shield layer;
including
In each of the plurality of flat conductors, only a pair of connecting portions located at both ends in the longitudinal direction of the flat conductor are exposed;
The plurality of connection portions positioned at one end in the longitudinal direction of the plurality of flat conductors are offset in the width direction of the flat conductors so as not to overlap each other when viewed in the plate thickness direction, and As the position of each connection portion in the plate thickness direction moves from one side to the other side in the plate thickness direction, the position of each connection portion in the width direction moves from one side to the other side in the width direction. , is placed,
The plurality of connection portions positioned at the other ends in the longitudinal direction of the plurality of flat conductors are offset in the width direction so as not to overlap each other when viewed in the plate thickness direction, and each of the connection portions As the position in the plate thickness direction of moves from the one side in the plate thickness direction to the other side in the plate thickness direction, the position in the width direction of each connection portion moves from the other side in the width direction to the one side A method for manufacturing a wiring material, characterized in that it is arranged in 3. The method of manufacturing a wiring member according to claim 2, further comprising a bending step of bending the plurality of laminated flat conductors into a predetermined shape before forming the insulating layer. 2. A gap due to a difference in installation height between the connecting portions is provided in the connecting portions where the connecting portions of the plurality of flat conductors in the plurality of wiring members are electrically connected to each other. A connection structure for wiring members, characterized in that a spacer is interposed to absorb the 2. A gap due to a difference in installation height between the connecting portions is provided in the connecting portions where the connecting portions of the plurality of flat conductors in the plurality of wiring members are electrically connected to each other. A connection structure for wiring members, wherein a bent portion for absorbing a is formed in each of the connection portions of at least one of the flat conductors. Between each connection portion of the plurality of flat conductors in the wiring member according to claim 1 and each connection piece of the branch connection member electrically connected to each connection portion, both members A connection structure for wiring members, characterized in that a spacer is interposed to absorb a gap due to a difference in installation height between the wiring members. At least one of the connection portions of the plurality of flat conductors in the wiring member according to claim 1 and each connection piece of the branch connection member electrically connected to each connection portion has both A connection structure for wiring members, characterized in that a bent portion is formed to absorb a gap due to a difference in installation height between members. 8. A wiring member connection structure, wherein the branch connection member according to claim 6 or 7 is accommodated in an insulating branch box.

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