JP2002373529A - Flat cable, and wiring method with flat cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat cable, and wiring method by the flat cable which can carry out wiring so that both of the front-and-back sides may not be reversed by changing its course. SOLUTION: A bending part for the course change in a middle portion of the longer direction of the flat cable 20 has a front-and-back sides reversal preventing structure 1 by bending twice. Then, it is constituted that the both sides of the front-and-back sides of the flat cable 20 do not be reversed by course change of wiring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat cable used for wiring a vehicle or the like and a wiring method using the flat cable.

[0002]

2. Description of the Related Art Flat cables have been widely used as wiring harnesses for wiring of vehicles and the like.

For example, a flat cable 80 shown in FIG. 8A has two parallel conductor wires 80a and 80b covered with an insulating material 80c. A terminal 81 is attached to each end of the conductor wires 80a and 80b of the flat cable 80.
82 are connected to each other, and both terminals 81 and 82 are inserted into and held in the connector housing 83.

When the route is changed by the wiring using the flat cable 80, as shown in FIG. 8 (b), the flat cable 80 is folded at approximately 45 degrees in the longitudinal direction at the route change position P in the figure. Of the flat cable 80 is folded in the direction indicated by the arrow to change the route of the flat cable 80 in the direction of approximately 90 degrees.

When the route is changed by this method, the flat cable 80 is turned over and the arrangement of the terminals 81 and 82 is reversed. The array needs to be flipped accordingly.

Here, as a specific example of wiring using a flat cable using this method, a wire harness 90 shown in FIG. 9 will be described in detail.

The wire harness 90 has a wide flat cable 91 which is a trunk line and is provided with a predetermined length of branch slit along the longitudinal direction from one end of the flat cable 91 so as to be a branch cable. The flat cables 93 to 96 are bent at the path change positions A to G to form a desired harness shape and lead to connection points of the respective electrical components.

[0008] The flat cable 91 as a trunk line
Connector housing 75 is connected to the mating connector 65 for connection, and each flat cable 93 as a branch line is connected.
By connecting and connecting the connector housings 71 to 74 respectively connected to the ends of the components 96 to 96 to the mating connectors 61 to 64 such as electrical components, predetermined wiring can be performed.

As shown in FIG. 9, the flat cables 93, 94a, and 96a, which are branch lines, are turned upside down with respect to the flat cable 91, which is a trunk line, due to a route change. ing. For this reason,
The terminal arrangement of the mating connectors 61, 62, and 64 must be reversed in advance in accordance with the terminal arrangement of the connector housings 71, 72, and 74, respectively. It should be noted that the flat cable 95 as the branch line is in the same state as the flat cable 91 as the trunk line, so that the arrangement of the conductor wires is not inverted, so that the terminal arrangement of the mating connector 63 does not need to be inverted.

[0010]

As described above, when the flat cable is bent and the path is changed, the flat cable is inverted every time the path is changed, and the arrangement order of the conductors in the flat cable is changed. In the part where the terminal arrangement is inverted at the end of
It is necessary to reverse the terminal arrangement of the mating connector in advance in accordance with it, which may be inconvenient in designing a wiring circuit. In particular, when a wide flat cable, which is a trunk line, is branched into a plurality of branch lines, and the flat cable of each branch line is bent many times in accordance with the wiring path and the path is changed to perform wiring, the design of the wiring circuit is required. Because of the complexity, the above problem becomes apparent.

An object of the present invention is to solve such problems of the prior art, and an object of the present invention is to provide a flat cable and a wiring method using the flat cable, which can be wired so that the front and the back are not inverted due to a route change.

[0012]

SUMMARY OF THE INVENTION The present invention relates to a flat cable in which a plurality of parallel conductor wires are covered with an insulating material, wherein a bent portion for changing a path in a middle portion in the longitudinal direction of the cable is turned upside down by bending twice. Has a prevention structure.

[0013] According to this configuration, since the bent portion for changing the path has a structure for preventing front and back inversion by bending twice, the front and back of the flat cable return to the original position by bending twice at the bent portion. The change enables the wiring so that the front and back of the flat cable are not inverted.

Thus, even if the path is repeatedly changed by wiring with the flat cable, the flat cable does not turn over and the arrangement order of the conductors in the flat cable does not change. Is easily determined, which is convenient in designing a wiring circuit.

Further, since the arrangement order of the conductors in the wired flat cable can be ascertained, the work of confirming each signal line of the wiring by the flat cable becomes easy.

In the above-mentioned flat cable front / back reversal prevention structure, the cable is folded in two at a bent portion at a fold line of approximately 45 degrees with respect to the longitudinal direction, and the overlapping portion of the cable due to the two-folding is formed in the overlapping portion. A configuration in which the cable is bent so as to overlap the adjacent cable portion can be adopted. Note that the second bent portion may be appropriately set in a region near the first bent portion.

According to this configuration, it is possible to change the route of the flat cable at approximately 90 degrees, and it is possible to perform a desired wiring according to the wiring route in an orderly and simple manner.

Further, in the above-mentioned structure for preventing front and back inversion, the cable is folded in two at a bent portion at a predetermined angle with respect to the longitudinal direction, and the overlapping portion of the cable due to the folding is adjacent to the overlapping portion. A configuration may be adopted in which the boundary line with the cable portion is a folding line and the cable is bent so as to overlap the cable portion.

According to this configuration, it is possible to change the path of the flat cable to an arbitrary angle other than 90 degrees while minimizing the area of the bent portion. Then, the cable length before bending can be saved by the reduction in the area of the bent portion.

In the wiring method using a flat cable according to the present invention, one of the above flat cables is vertically stacked or another flat cable is superposed and the upper and lower conductors are electrically connected via a connecting member. Thus, a method of configuring an electric circuit by combining a plurality of flat cables according to a wiring path is provided.

According to this wiring method, the wiring path is changed by bending the flat cable twice, and the method of electrically connecting the conductors of the flat cable vertically stacked via the connecting member is appropriately combined. This makes it possible to easily respond to a change in the wiring route.

Further, the present invention relates to a wiring method using a flat cable in which a plurality of parallel conductor wires are covered with an insulating material, wherein the flat cable is folded in two directions in different directions at a path change position in a middle portion in the longitudinal direction of the cable. And a second step of bending an overlapped portion of the flat cable formed in the first step so as to overlap a cable portion adjacent to the overlapped portion. Are wired so as not to be inverted.

According to this wiring method, since the flat cable whose front and back are reversed in the first step is returned to its original state by being bent twice through the second step, the front and rear of the flat cable are not reversed due to the route change. Can be wired.

[0024]

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows an example of a method for wiring a flat cable according to the present invention.

The flat cable 20 shown in FIG.
Is formed by covering two parallel conductor wires 20a and 20b (for example, a rectangular conductor such as an aluminum wire or a copper wire) with an insulating material 20c such as a synthetic resin. A terminal 21 is provided at each end of the conductor wires 20a and 20b of the flat cable 20.
22 are connected to each other, and both terminals 21 and 22 are inserted and held in the connector housing 23.

When the route is changed by the wiring using the flat cable 20, the flat cable 20 is bent according to the procedure shown in FIGS. 1 (b) to 1 (d).

That is, first, as shown in FIG. 1B, the flat cable 20 is folded at the path change position P at a folding line of approximately 45 degrees with respect to the longitudinal direction in the direction indicated by the arrow in the figure. Then, the flat cable 20 is bent substantially in the direction of 90 degrees (first step).

As a result, although the wiring direction of the flat cable 20 is changed by approximately 90 degrees, the flat cable 20 is turned over as it is, and the arrangement of the terminals 21 and 22 is reversed as indicated by the reference numerals.

Then, next, as shown in FIG.
The flat cable 20 is folded such that the overlapping portion R of the flat cable 20 formed in the first step is a folding line at the boundary between the overlapping portion R and the cable portion adjacent to the overlapping portion R, and overlaps the cable portion on the front side. It is bent in the direction indicated by the arrow in the figure (second step).

As a result, as shown in FIG.
Since the flat cable 20 turned upside down in the step is returned by being bent twice through the second step, the wiring is rerouted in a state where the flat cable 20 is not turned upside down.

Therefore, the arrangement of the terminals 21 and 22 of the flat cable 20 whose path has been changed does not change in the same arrangement as before the path change, as indicated by reference numerals. 21 and 2
2 is a terminal 2 arranged in the mating connector 25 such as an electrical component.
6 and 27 can be connected to each other to perform predetermined wiring.

In the second step shown in FIG.
The flat cable 20 may be bent such that the overlapping portion R of the flat cable 20 formed in the first step overlaps with the cable portion adjacent to the overlapping portion R on the back side.

Further, in order to maintain the state of the bent portion as required, the flat cables 20 vertically overlapping at the bent portion are bonded and fixed, or the insulating material 20c of the flat cable 20 vertically stacked at the bent portion is provided.
Should be fixed by heat welding. As another alternative,
Each flat cable 2 that overlaps vertically at the bent part
0 may be fixed by being sandwiched between elastic clamp members having a “U” -shaped cross section made of synthetic resin, metal, or the like.

As shown in FIG. 1 (d), the flat cable 20 whose path has been changed by the above-described method has the front / back inversion prevention structure 1 in which the bent portion for changing the path is bent twice. This front / back inversion prevention structure 1 is
At the bent portion, the flat cable 20 is folded in two at a fold line of approximately 45 degrees with respect to the longitudinal direction.
The overlapping portion R of the flat cable 20 by folding is
It is configured to be bent so as to overlap the cable portion adjacent to the overlapping portion R.

According to this configuration, since the bent portion for changing the path forms the structure 1 for preventing front and back inversion by bending twice, the front and back of the flat cable 20 return to the original position by bending twice at the bent portion. In addition, wiring can be performed so that the front and back of the flat cable 20 are not inverted due to the change of the route.

Further, even if the route change is repeated with the wiring by the flat cable 20, the front and back of the flat cable 20 are not inverted, and each conductor wire 2
0a, 20b, the mating connector 2 for connecting the terminals 21, 22 of the flat cable 20 does not change.
The arrangement of the five terminals 26 and 27 is easily determined, which is convenient for designing a wiring circuit.

Here, as a specific example of wiring by a flat cable using this method, a method of manufacturing the wire harness 10 shown in FIG. 2 will be described in detail with reference to FIGS.

As shown in FIG. 2, each flat cable 13 is formed by branching a wide flat cable 11 which is a trunk line by a branch slit and cutting it into a predetermined length in accordance with a wiring path. ~ 16,
Each of the flat cables 12 to 16 whose path has been changed is guided face-to-face to a connection point of each electrical component or the like while being turned upside down, being bent twice at the path change positions A to G, respectively, to have a desired harness shape.

The flat cable 11 which is the trunk line
The connector housings 35 to 34 connected to the ends of the flat cables 13 to 16, which are branched branches, are connected to the connector housings 35 connected to the ends of the flat cables 13 to 16, respectively. By connecting and connecting to the mating connectors 41 to 44 of the respective electrical components and the like, a predetermined wiring is formed.

In manufacturing the wire harness 10, first, a wide flat cable in which a plurality of parallel conductor wires (for example, a rectangular conductor such as an aluminum wire or a copper wire) is covered with an insulating material such as a synthetic resin is prepared. I do.

Next, as shown in FIG. 3, branching slits 11a to 11c are formed in the insulating material between the conductor wires of the flat cable 11 from one end of the flat cable 11 along the longitudinal direction thereof in accordance with the wiring route. Then, the flat cables 13 to 16 branched by the branch slits 11a to 11c are cut into a predetermined length to preprocess into a predetermined shape.

Next, as shown in FIG. 4, each of the flat cables 12 to 16 branched by the branch slits 11a to 11c is moved at predetermined path changing positions A to G in the longitudinal direction in accordance with the wiring path. The cable is folded in two at approximately 45-degree folding lines, and the flat cables 12 to 16 are bent at approximately 90-degree directions at the respective path change positions A to G.

Specifically, the flat cable 11 is branched into flat cables 12 and 13 at a position A by a branch slit 11a shown in FIG.
Is further branched to a flat cable 14 at a position B by a branch slit 11b, and branched to a flat cable 15 and 16 at a position D by a branch slit 11c.
The flat cable 13 has a fold line of approximately 45 degrees
The flat cable 14 is folded in two at a position of approximately 45 degrees at two positions B and C, and folded in approximately 90 degrees. Also,
The flat cable 15 has a 45 degree fold line
The flat cable 16 is folded in two at a position of approximately 45 degrees at two positions E and F, and is folded in approximately 90 degrees.

Next, as shown in FIG. 4, the overlapping portions Ra to Rg of the flat cables 11 to 16 formed by the above-described steps are drawn so as to overlap the cable portions adjacent to the overlapping portions Ra to Rg. It is bent in the direction indicated by the arrow in the middle and processed into the shape shown in FIG.

More specifically, the overlapping portion Ra of the flat cable 11 is bent in the direction indicated by the arrow in the drawing so as to overlap the adjacent cable portion on the back side of the flat cable 11. Similarly, each of the flat cables 14 to 16
Are bent in the directions indicated by the arrows in the figure so that the overlapping portions Rb, Rd, and Re overlap with the adjacent cable portions on the front side of the flat cable 12. Furthermore, each overlapping portion Rg, Rc, Rf of each flat cable 13, 14, 16
Is bent in the direction shown by the arrow in the figure so as to overlap the cable portion adjacent to each of the flat cables 13, 14, 16 on the front side. Thereby, each of the branched flat cables 12 to 16 has a shape as shown in FIG.

Incidentally, in order to maintain the state of the bent portion as required, the flat cables which vertically overlap each other at the bent portions indicated by reference numerals A to G are fixed by bonding, or the flat cables which vertically overlap each other at the bent portions. It is preferable to fix the insulating material by heat welding. As still another method, the flat cables that are vertically overlapped at the bent portion may be fixed by being sandwiched between elastic clamp members having a “U” -shaped cross section made of synthetic resin, metal, or the like.

Here, each of the flat cables 13 to 16
Has the same configuration as the flat cable 20 described above with reference to FIG. 1, and two parallel conductor wires are covered with an insulating material. Similarly, the flat cable 11 has eight parallel conductor wires covered with an insulating material. Connector terminals are crimped to the conductor wires at the ends of the flat cables 11, 13 to 16, respectively.
The connector housings 35, 31 to 34 shown in FIG. The connector terminals are locked so as not to come out by engaging a locking lance with the terminal locking portion by a well-known locking mechanism provided in each of the connector housings 31 to 35. Thereby, the wire harness 10 shown in FIG. 2 is completed.

The connector housing 35 connected to the end of the flat cable 11 which is the main line of the wire harness 10 is connected to the mating connector 45 for connection, and the branched flat cables 13 which are the branch lines are connected.
Connector housings 31 to 34 respectively connected to the ends of the corresponding electrical components, etc.
By connecting to and connecting to each other, predetermined wiring can be performed.

In the manufacturing process of the wire harness 10, the order of the bending process and the terminal fixing process may be reversed. Further, the flat cables 12 to 16 may be bent when the wire harness 10 is actually wired to a vehicle body or the like without providing a bending step at the time of manufacturing.

As described above, the wire harness 10 described above is used.
Is designed to perform wiring in which the entire length of the flat cable is long and the path change is large. The front and back of the flat cables 12 to 16 are not inverted due to the change of the route.

Thus, even if the route change is repeated by the wiring using the flat cable, each of the flat cables 12 to
16 are not reversed, and each flat cable 12-16
, The arrangement order of the conductor wires does not change. For this reason, the mating connector 4 for connecting the terminals of the flat cables 13 to 16 inserted into the connector housings 31 to 34, respectively.
The terminal arrangement of 1 to 44 is easily determined, which is convenient for designing a wiring circuit.

Further, since the arrangement order of the conductor lines in each of the flat cables 11 to 16 can be grasped, the work of confirming each signal line of the wiring by each of the flat cables 11 to 16 becomes easy.

Further, at the bent portions indicated by reference numerals A to G, each of the flat cables 12 to 16 is folded in two at a folding line of approximately 45 degrees with respect to its longitudinal direction.
Each of the flat cables 12 to 1 is formed such that the overlapped portion of the cable by folding is formed on the boundary between the cable portion adjacent to the overlapped portion and the cable portion so as to overlap the cable portion.
6 is bent. For this reason, the flat cables 12 to 16 are connected to each other by approximately 9 while minimizing the area of the bent portion.
The route can be changed at 0 degrees, and a desired wiring matching the wiring route can be made orderly and easily.

The wire harness 1 shown in FIG.
0 may be the form of the wire harness 50 shown in FIG.

This wire harness 50 is a wire harness 50 shown in FIG.
By bending the flat cables 51 to 55 appropriately in accordance with the wiring route and overlapping a part of each of the flat cables 51 to 55 as appropriate, and electrically connecting the upper and lower conductors using a connecting member such as a metal pin. And a desired harness shape.

More specifically, the wide flat cable 51 which is the trunk line has four parallel conductor wires 51 a formed of insulating material 5.
1b. Flat cable 5 that is a branch line
2 to 55, two parallel conductor wires 52a to 55a are covered with insulating materials 52b to 55b, respectively. On the flat cable 51, the ends of the flat cables 52 and 53 are respectively superposed at the path change position A and the branch position H at the cable end, and the flat cable 51 is connected to each of the connecting portions Ja and Jh using metal pins or the like. With flat cable 5
2 and 53 are electrically connected to different conductor lines. This flat cable 52 is connected to a route change position E,
Each of the overlapping portions Re and Rf of F forms a structure for preventing front and back inversion by bending twice. The flat cable 53 has a structure in which the overlapping portion Rg of the route changing position G is bent twice to prevent the front and back from being inverted. Further, the ends of the flat cables 54 and 55 are respectively overlapped with the route change positions B and D in the middle part of the flat cable 52, and the connecting portions Jb and Jd are formed on the flat cable 52 using metal pins or the like. With flat cable 5
4 and 55 are electrically connected to different conductor lines, respectively. The flat cable 54 has a structure in which the overlapping portion Rc of the route change position C is bent twice to prevent the front and back from being inverted. In addition, when the upper and lower conductors of the stacked flat cables are electrically connected to each other using metal pins or the like, the reliability of the electrical connection can be improved by using ultrasonic welding.

Then, the flat cable 51 as a trunk line
The connector housing 35 connected to the end of the flat cable 52-55 is connected to the mating connector 45, and the connector housings 31-34 respectively connected to the ends of the flat cables 52-55, which are branch wires, are connected to the respective electrical components. It is configured such that a predetermined wiring can be formed by connecting and connecting to the mating connectors 41 to 44 of the product or the like.

As described above, the wire harness 5 shown in FIG.
In FIG. 2, the wide flat cable, which is the main line, is branched by the slit for branching in the wire harness 10 shown in FIG. 2, but the wide flat cable 51 and the branch flat cables 52 to 55 are appropriately stacked vertically. The conductors are electrically connected using metal pins or the like. The wire harness 50 has the same operation and effect as the wire harness 10 shown in FIG. In addition, in the wire harness 50, the wiring path is changed by a method of bending the flat cable twice and a method of electrically connecting the conductors of the flat cable vertically stacked via a connection member as appropriate. This makes it possible to easily cope with a change in the wiring route.

As described above, the flat cable according to the present invention and the wiring method using the flat cable are not limited to the specific configuration of each of the above-described embodiments, but may be modified, added, replaced, or modified as necessary. It goes without saying that the configuration may be deleted.

For example, in the above description, the cable is folded in two at the bent portion at a fold line of approximately 45 degrees with respect to the longitudinal direction, and the overlapped portion of the two-folded cable overlaps the cable portion adjacent to the overlapped portion. Although the example of bending and changing the path of the flat cable at approximately 90 degrees has been described, the present invention is not limited to this, and the bending angle of the flat cable in the first step and the second step may be appropriately changed. Thus, it is possible to change the route of the flat cable to an arbitrary angle other than 90 degrees.

Further, in the above description, the flat cable 11 which is an example of the flat cable of the present invention is divided into a wide flat cable 11 by a branch slit in accordance with a wiring path and cut into a predetermined length. 13 to 16 are respectively bent twice at the path change positions A to G to obtain a desired harness shape as shown in FIG. 2, but the present invention is not limited to this, and the present invention is not limited to this. Instead of the flat cable, a similar harness shape may be used by using four flat cables having a narrow width fixed together with a fixing tape.

[0063]

As described above, according to the flat cable of the present invention, since the bent portion for changing the path has a structure to prevent the front and back from being inverted by bending twice, the flat cable can be turned upside down at the bent portion. Since the cable is returned to its original state by bending twice, the cable can be wired so that the front and back of the flat cable are not inverted due to the path change.

As a result, even if the route is repeatedly changed by wiring with a flat cable, the flat cable does not turn over and the arrangement order of the conductors in the flat cable does not change. Is easily determined, which is convenient in designing a wiring circuit.

Further, since the arrangement order of the conductors in the wired flat cable can be ascertained, the work of confirming each signal line of the wiring by the flat cable becomes easy.

The above-described flat cable front / back inversion prevention structure is constructed such that the cable is folded in two at a bending portion at a fold line of approximately 45 degrees with respect to the longitudinal direction, and the overlapping portion of the cable due to the two-folding is formed in the overlapping portion. When the flat cable is bent so as to overlap with the adjacent cable portion, the route of the flat cable can be changed at approximately 90 degrees, and desired wiring matching the wiring route can be performed orderly and easily.

Further, in the above-mentioned structure for preventing inversion of the front and back, the cable is folded in two at a bent portion at a fold line at a predetermined angle with respect to the longitudinal direction, and the overlapping portion of the cable due to the folding is adjacent to the overlapping portion. If the cable is bent so that the boundary line with the cable portion is a fold line, and the cable is bent so as to overlap with the cable portion, the flat cable can be cut while minimizing the area of the bent portion.
The path can be changed to any angle other than 0 degrees. Then, the cable length before bending can be saved by the reduction in the area of the bent portion.

According to the flat cable wiring method of the present invention, the flat cable, which has been turned upside down in the first step, returns to the original state by being bent twice through the second step. Wiring can be performed so that the front and back are not inverted.

According to another wiring method using a flat cable according to the present invention, the wiring path can be changed by bending the flat cable twice, or by connecting the conductors of the flat cable vertically stacked via a connecting member. Electrical connection methods can be appropriately combined and performed, so that it is possible to easily cope with a change in a wiring route.

[Brief description of the drawings]

FIG. 1 is a plan view showing a flat cable and a wiring method using the flat cable according to the present invention.

FIG. 2 is a perspective view showing a configuration example of a wire harness using the flat cable according to the present invention.

FIG. 3 is a perspective view showing a state where a flat cable is subjected to slitting and cutting in a manufacturing process of the wire harness shown in FIG. 2;

FIG. 4 is a perspective view showing a state in which a flat cable is folded at a path changing position in a manufacturing process of the wire harness shown in FIG. 2;

FIG. 5 is a perspective view showing a state where an overlapping portion of the flat cable is bent so as to overlap an adjacent cable portion at a path change position in a manufacturing process of the wire harness shown in FIG. 2;

FIG. 6 is a perspective view showing another configuration example of the wire harness using the flat cable according to the present invention.

FIG. 7 is a plan view illustrating five flat cables used to manufacture the wire harness illustrated in FIG.

FIG. 8 is a plan view showing a conventional method when a route is changed by wiring using a flat cable.

FIG. 9 is a perspective view showing a configuration example of a wire harness using a conventional flat cable.

[Explanation of symbols]

 1 Front / Back Inversion Prevention Structure 11-16, 20, 51-55 Flat Cable 20a, 20b, 51a-55a Conductor Wire 20c, 51b-55b Insulating Material A-G, P Route Change Position (Bent) R, Ra-Rg Overlap part

Continuation of the front page (72) Inventor Hiroyuki Hayashi 1-7-10 Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture Inside Auto Network Engineering Laboratory Co., Ltd. (72) Inventor Toshio Yoneya 1-7-1, Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture No. Auto Network Engineering Laboratory Co., Ltd. F-term (reference) 5G309 AA11 5G311 CA05 CF05 5G357 CA06 CB10 CC01 5G363 AA16 BA05 DC02

Claims (5)

[Claims] 1. A flat cable in which a plurality of parallel conductor wires are covered with an insulating material, wherein a bent portion for changing a path in a middle portion in a longitudinal direction of the cable has a structure for preventing front and back inversion by bending twice. Flat cable. 2. In the above-mentioned structure, the cable is folded at a bent portion at a fold line of approximately 45 degrees with respect to the longitudinal direction, and the overlapping portion of the two-folded cable is adjacent to the overlapping portion. The cable is bent so as to overlap the cable portion to be formed.
The described flat cable. 3. The front / back inversion prevention structure according to claim 1, wherein the cable is folded at a bent portion at a folding line at a predetermined angle with respect to a longitudinal direction, and an overlapped portion of the cable due to the folded portion is adjacent to the overlapped portion. 2. The flat cable according to claim 1, wherein the cable is bent so that a boundary line with the cable portion is a fold line and overlaps the cable portion. 4. A flat cable according to any one of claims 1 to 3, which is vertically overlapped or another flat cable is overlapped, and the upper and lower conductors are electrically connected via a connecting member. A wiring method using a flat cable, comprising forming an electric circuit by combining a plurality of flat cables according to a wiring path. 5. A wiring method using a flat cable in which a plurality of parallel conductor wires are covered with an insulating material, wherein a first step of folding the flat cable in two different directions at a path change position in a middle portion in the longitudinal direction of the cable. And a second step of bending an overlapping portion of the flat cable formed in the first step so as to overlap a cable portion adjacent to the overlapping portion,
A wiring method using a flat cable, wherein the wiring is performed so that the front and the back of the flat cable are not inverted due to a route change.