JP2013065425A - Wire harness and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a branch appropriately in a wire harness having a branch, without complicating the manufacturing process, and to suppress the manufacturing error.SOLUTION: A wire harness 1 includes circuit wiring 10 having a linear protection part 12 formed by hot pressing in a state where a nonwoven fabric 12a covers a wire 11, and a first branch part branch line 20 having a substantially L-shaped protection part 22 and a second brach part branch line 30 having a substantially L-shaped protection part 32 formed by hot pressing in a state where a nonwoven fabric 23a covers a wire 21. An original branch line 2 is composed of the circuit wiring 10, one end side part of the first branch part branch line 20, and one end side part of the second branch part branch line 30, and a branch line 3 is composed of the other end side part of the first branch part branch line 20, and the other end side part of the second branch part branch line 30.

Description

  The present invention relates to a technique for protecting a branch portion of a wire harness.

  The wire harness is a wiring material that interconnects various electric devices mounted on a vehicle or the like, and a plurality of electric wires are branched and bound in a manner according to the arrangement positions and wiring paths of the various electric devices. In such a wire harness, the branch line branches off from the branch part in the middle of the branch source line, and the part other than the branch part of the wire harness is covered with vinyl tape, urethane, etc., and the branch part is wound with vinyl tape. To be protected.

  In addition, a technique for forming a protector by sandwiching a flat circuit body between two covering bodies made of a thermoplastic material and heating and compressing the two covering bodies has been conventionally known. (For example, patent document 1).

Japanese Patent Laid-Open No. 2003-197038

  However, when the technique of Patent Document 1 is adopted for the wire harness having a branching portion, from one end of the branching source line to the front of the branching unit, from the other end of the branching source line to the front of the branching unit, the branching line A protector is respectively formed from one end of the front end to the front of the branching portion. Further, since the vinyl tape is wound around the branch portion, the manufacturing process is complicated.

  In addition, the vinyl tape is wound by the cross tape winding in which the vinyl tape is alternately wound on both sides across the branch line from the branch portion, and further, the vinyl tape is wound around the end portion of the protector. The periphery is enlarged in a ring shape. Since the size of the branch portion and its peripheral portion changes depending on how the vinyl tape is wound, the size of the portion varies greatly depending on the operator. For this reason, there exists a problem that the manufacture error of a wire harness becomes large.

  Therefore, an object of the present invention is to appropriately protect a branching portion without complicating the manufacturing process and to suppress a manufacturing error in a wire harness having a branching portion.

  In order to solve the above-mentioned problem, the wire harness according to the first aspect is a wire harness in which a branch line branches off from a branch part in the middle of the branch source line, and is hot-pressed in a state where the non-woven member covers the electric wire. A first branching branch line and a second branching branch line having a protection part formed by hot-pressing the non-woven member in a state of covering the electric wire. The branch line is constituted by one end side portion of the circuit wiring, the first branch portion branch line, and one end side portion of the second branch portion branch line, and the other end side of the first branch portion branch line The branch line is constituted by the portion and the other end portion of the second branch portion branch line.

  A 2nd aspect is a wire harness which concerns on a 1st aspect, Comprising: The said 1st branch part branch line and the said 2nd branch part branch line are multiple types of 1st branch part branch lines and 2nd branch part branches. Each of the lines can be selected.

  A 3rd aspect is a wire harness which concerns on a 1st or 2nd aspect, Comprising: The protection part of the said circuit wiring and the said 1st, 2nd branch part branch line is substantially with respect to the extension direction of the said electric wire. Each of the orthogonal surfaces has a semicircular cross section.

  The manufacturing method of the wire harness which concerns on a 4th aspect is a manufacturing method of the wire harness which a branch line branches from the branch part in the middle of a branch original line, Comprising: (a) It is hot in the state in which the nonwoven member covered the electric wire. A step of forming a circuit wiring having a protective portion by pressing, and (b) a non-woven member being hot pressed in a state of covering the electric wire, thereby having a protective portion bent substantially at a right angle. The step of forming the die of the one branch portion branch wire, and (c) sharing the die used in the step (b), and hot pressing the non-woven member covering the electric wire, substantially perpendicular A step of forming a second branch portion branch line having a protection portion bent into a die; (d) one end side portion of the common circuit wiring, the first branch portion branch line, and the second branch portion branch line; The one end side part is assembled to produce the branch source line, and the first branch And a step of manufacturing the branch line assembling and the other end portion of said the other end portion of the branch line and the second branch section branch line.

  A method for manufacturing a wire harness according to a fifth aspect is a method for manufacturing a wire harness in which a branch line branches off from a branch part in the middle of a branch source line, and (e) hot in a state where the nonwoven member covers the electric wire. A step of forming a circuit wiring having a protective part by pressing, and (f) a plurality of types of first branch parts having a protective part by hot pressing the nonwoven member covering the electric wire. (G) forming a plurality of types of second branch branch lines having a protection part by hot pressing in a state where the nonwoven member covers the electric wire, h) selecting one kind of first branch part branch line and second branch part branch line from among the plurality of types of first branch part branch lines and second branch part branch lines; One end side portion of the branching portion branch line, and one end side portion of the second branching portion branch line; Assembling to produce the branch source line, and assembling the other end side part of the first branch part branch line and the other end side part of the second branch part branch line to produce the branch line; Prepare.

  According to the wire harness according to the first aspect, the branch wiring and the branch line are constituted by the circuit wiring having the protection part and the first and second branch part branch lines, without complicating the manufacturing process. The branch part of the wire harness can be appropriately protected by the protection part. Moreover, since circuit wiring, a 1st branch part branch line, and a 2nd branch part branch line can each be manufactured using a metal mold | die, the manufacturing error of a wire harness can be suppressed.

  According to the wire harness which concerns on a 2nd aspect, by combining a common circuit wiring and the 1st, 2nd branch part branch line selected from multiple types of branch part branch lines, it is in various circuit specifications. A combined wire harness can be easily manufactured.

  According to the wire harness which concerns on a 3rd aspect, since a common circuit wiring, a 1st branch part branch line, and a 2nd branch part branch line can be assembled | attached in the stable state, the quality of a wire harness improves.

  According to the wire harness according to the fourth aspect, the circuit wiring having the protection part and the first and second branch part branch lines constitute the branch source line and the branch line, so that the manufacturing process is not complicated. The branch part of the wire harness can be appropriately protected by the protection part. Moreover, since circuit wiring, a 1st branch part branch line, and a 2nd branch part branch line can each be manufactured using a metal mold | die, the manufacturing error of a wire harness can be suppressed.

  Since the first branch part branch line and the second branch part branch line have the same shape, the mold can be shared, productivity can be improved, and the manufacturing cost can be suppressed.

  According to the wire harness which concerns on a 5th aspect, by combining a common circuit wiring and the 1st, 2nd branch part branch line selected from multiple types of branch part branch lines, it is in various circuit specifications. A combined wire harness can be easily manufactured.

It is a schematic perspective view which shows the wire harness which concerns on embodiment. It is a schematic perspective view which shows common circuit wiring same as the above. It is a schematic perspective view which shows a 1st branch part branch line same as the above. It is a schematic perspective view which shows the 2nd branch part branch line same as the above. It is a schematic perspective view which shows the example of the shaping | molding die for hot press for manufacturing common circuit wiring same as the above. It is explanatory drawing which shows the manufacturing process of common circuit wiring using the shaping | molding die for hot press same as the above. It is explanatory drawing which shows the manufacturing process of common circuit wiring using the shaping | molding die for hot press same as the above. It is a schematic perspective view which shows the example of the shaping | molding die for hot press for manufacturing the 1st, 2nd branch part branch line same as the above. It is explanatory drawing which shows the manufacturing process of the 1st branch part branch line using the shaping | molding die for hot press same as the above. It is explanatory drawing which shows the manufacturing process of the 1st branch part branch line using the shaping | molding die for hot press same as the above.

{Embodiment}
Hereinafter, the wire harness 1 which concerns on embodiment is demonstrated. FIG. 1 is a schematic perspective view showing the wire harness 1, FIG. 2 is a schematic perspective view showing the common circuit wiring 10, and FIG. 3 is a schematic perspective view showing the first branch portion branch line 20, FIG. 4 is a schematic perspective view showing the second branch portion branch line 30.

  The wire harness 1 includes a branch source line 2 and a branch line 3 that branches from a branch part 4 in the middle of the branch source line 2. The branch source line 2 includes a common circuit line 10 as a circuit line, one end side portion of the first branch portion branch line 20, and one end side portion of the second branch portion branch line 30. The branch line 3 is composed of the other end side portion of the first branch portion branch line 20 and the other end side portion of the second branch portion branch line 30.

  The common circuit wiring 10 includes an electric wire 11 and a protective portion 12 that protects a part of the electric wire 11. As shown in FIGS. 6 and 7, the protective portion 12 includes a non-woven fabric 12 a (nonwoven member). It is formed by hot pressing in a state of covering. The protection part 12 is formed in a straight line shape, and is formed in a semicircular cross section on a surface substantially orthogonal to the extending direction of the electric wire. The surface corresponding to the chord having a semicircular cross section in the protection portion 12 is formed on the flat surface 13 to which the first branch portion branch line 20 and the second branch portion branch line 30 can be assembled. In addition, the protection part 12 may be bent at a part other than the branch part 4 or the branch part 4. Further, the protection unit 12 may protect the entire electric wire 11.

  The first branch portion branch wire 20 includes an electric wire 21 and a protective portion 22 that protects a part of the electric wire 21 and is bent at a substantially right angle. As shown in FIGS. The non-woven fabric 23a (non-woven member) is formed by hot pressing with the electric wire 21 covered. The protection part 22 is formed in a substantially L shape, and has a semicircular cross section in which a L-shaped inner side is isolated and a L-shaped outer side is a string on a surface substantially orthogonal to the extending direction of the electric wire 21. Is formed. The protection unit 22 includes a linear first protection unit 23 and a second protection unit 24 bent in a direction orthogonal to the first protection unit 23. The surface corresponding to the first protection part 23 on the outside of the L shape is formed on the flat surface 25 to which the common circuit wiring 10 can be assembled, and the surface corresponding to the second protection part 24 on the outside of the L shape is The second branch portion branch line 30 is formed on a flat surface 26 to which the second branch portion branch line 30 can be assembled. The protective portion 22 may have a shape other than a substantially L shape, for example, the first protective portion 23 may be bent, or the second protective portion 24 may be bent in a direction other than the orthogonal direction with respect to the first protective portion 23. Good. Moreover, the protection part 22 may protect all the electric wires.

  The second branch portion branch wire 30 includes an electric wire 31 and a protective portion 32 that protects a part of the electric wire 31 and is bent at a substantially right angle. The protection part 32 is formed by hot pressing a non-woven fabric (nonwoven member) covering the electric wire 31, and is formed in the same shape as the protection part 22 of the first branch part branch line 20. The protection part 32 is formed in a substantially L shape, and has a semicircular cross section in which a L-shaped inner side is isolated and a L-shaped outer side is a string on a surface substantially orthogonal to the extending direction of the electric wire 31. Is formed. The protection part 32 includes a linear first protection part 33 and a second protection part 34 bent in a direction orthogonal to the first protection part 33. The surface corresponding to the first protection portion 33 on the outside of the L shape is formed on the flat surface 35 to which the common circuit wiring 10 can be assembled, and the surface corresponding to the second protection portion 34 on the outside of the L shape is It is formed on a flat surface 36 to which the second branch portion branch line 30 can be assembled.

  The second branch part branch line 30 may have a shape different from that of the first branch part branch line 20, and the second protection for the first protection part 23 in the protection part 22 when the common circuit wiring 10 is linear. The shape may be such that the sum of the angle of the part 24 and the angle of the second protective part 34 with respect to the first protective part 33 in the protective part 32 is an angle of 180 degrees. When the common circuit wiring 10 is bent, the sum of the angle of the second protection part 24 relative to the first protection part 23 in the protection part 22 and the angle of the second protection part 34 relative to the first protection part 33 in the protection part 32. However, the common circuit wiring 10 may have a shape that matches the angle formed by the one end portion and the other end portion on the side where the first branch portion branch line 20 and the second branch portion branch line 30 are assembled. Further, the protection unit 32 may protect the entire electric wire 31. Furthermore, the 1st branch part branch line 20 and the 2nd branch part branch line 30 may be formed in the shape of a quarter circle in the surface substantially orthogonal to the extension direction of the electric wire 21 and the electric wire 31.

  As the electric wires 11, 21, and 31, those constituting the wire harness 1 that interconnects various electric devices in a vehicle or the like are assumed. But the protection object by the protection parts 12, 22, and 32 may be a bundle of wires in which a plurality of wires 11, 21, and 31 are bundled, or may be one wire 11, 21, and 31.

  As a nonwoven fabric, the nonwoven fabric which can be hardened by passing through a heating process can be used. As such a non-woven fabric, a material containing intertwined basic fibers and an adhesive resin (also called a binder) can be used. The adhesive resin is a resin having a melting point (for example, 110 ° C. to 115 ° C.) lower than the melting point of the basic fiber. Then, by heating the nonwoven fabric to a processing temperature lower than the melting point of the basic fiber and higher than the melting point of the adhesive resin, the adhesive resin melts and soaks between the basic fibers. Thereafter, when the nonwoven fabric has a temperature lower than the melting point of the adhesive resin, the adhesive resin is solidified in a state where the basic fibers are bonded to each other. As a result, the nonwoven fabric becomes harder than the state before heating and is maintained in the molded shape during heating.

  The adhesive resin may be granular or fibrous. An adhesive resin layer may be formed on the outer periphery of the core fiber to form a binder fiber, which may be entangled with the basic fiber. As the core fiber in this case, the same material as the basic fiber can be used.

  As said basic fiber, what is necessary is just to be able to maintain a fiber state with melting | fusing point of adhesive resin, and various fibers other than a resin fiber can be used. As the adhesive resin, thermoplastic resin fibers having a melting point lower than that of the basic fiber can be used. Examples of the combination of the basic fiber and the adhesive resin include an example in which the basic fiber is a resin fiber of PET (polyethylene terephthalate) and the adhesive resin is a copolymer resin of PET and PEI (polyethylene isophthalate). In this case, the melting point of the basic fiber is approximately 250 ° C., and the melting point of the adhesive resin is 110 ° C. to 150 ° C. For this reason, when the nonwoven fabric is heated to a temperature of 110 ° C. to 250 ° C., the adhesive resin melts and soaks between the basic fibers that keep the fiber shape without melting. And when a nonwoven fabric becomes temperature lower than melting | fusing point of adhesive resin, adhesive resin solidifies in the state which couple | bonded basic fibers, a nonwoven fabric becomes hard, and the shaping | molding shape at the time of a heating is maintained. Moreover, when the melted adhesive resin soaks into the contact portion between the nonwoven fabrics, the nonwoven fabrics are joined together by the adhesive resin.

  Hot press refers to molding a nonwoven fabric by sandwiching a nonwoven fabric, which is an object to be processed, between molds and applying pressure to the mold in a heated state. A more specific example of a hot press suitable for forming the protection parts 12, 22, and 32 will be described later.

  The first branch part branch line 20 and the second branch part branch line 30 can be selected from a plurality of types of first branch part branch lines 20 and second branch part branch lines 30, respectively. For example, three types of circuit specifications of “AUDIOLESS”, “AUDIO 6SP (6-speaker specification)”, and “NAVI etc (navigation specification)” are set as the first branching branch line 20. One type is selected from the circuit specifications and assembled. For example, two types of circuit specifications, “AUTO AC (automatic air conditioner specification)” and “MANUAL AC (manual air conditioner specification)”, are set as the second branch part branch line 30. One type is selected and assembled. In addition, as the circuit specifications of the first branch part branch line 20 and the second branch part branch line 30, other circuit specifications may be set, and various types of circuit specifications may be set. Various types of circuit specifications may also be set for the common circuit wiring 10.

  In a state where the flat surface 25 of the first protective portion 23 (one end side portion) of the first branch portion branch line 20 is in close contact with the one end portion of the flat surface 13 of the protective portion 12 of the common circuit wiring 10, The common circuit wiring 10 and the first branch portion branch line 20 are fixed by the binding portion 40 attached to the first protection portion 23 on the outer side in the longitudinal direction from the branch portion 4. As the binding unit 40, for example, a vinyl tape or a binding band is employed. The close contact portions of the protection portion 12 of the common circuit wiring 10 and the first protection portion 23 of the first branch portion branch line 20 are formed in a circular cross section in a plane substantially orthogonal to the extending direction of the electric wires.

  In a state where the flat surface 35 of the first protective portion 33 (the other end portion) of the second branch portion branch line 30 is in close contact with the other end portion of the flat surface 13 of the protective portion 12 of the common circuit wiring 10, the protective portion The common circuit wiring 10 and the second branch part branch line 30 are fixed by a binding part 41 attached to the outer side in the longitudinal direction of the branch part 4 in the 12 and the first protection part 33. As the binding part 41, for example, a vinyl tape or a binding band is employed. The close contact portions of the protection portion 12 of the common circuit wiring 10 and the first protection portion 33 of the second branch portion branch line 30 are formed in a circular cross section on a surface substantially orthogonal to the extending direction of the electric wires.

  The flat surface 26 of the second protection part 24 (the other end side portion) of the first branch part branch line 20 and the flat surface 36 of the second protection part 34 (the other end side part) of the second branch part branch line 30 are in close contact with each other. In this state, the first branch part branch line 20 and the second branch part are connected by the binding part 42 attached to the first branch part branch line 20 and the second branch part branch line 30 outside the branch part 4 in the longitudinal direction. The branch line 30 is fixed. As the binding part 42, for example, a vinyl tape or a binding band is employed. The close contact portions of the second protection part 24 of the first branch part branch line 20 and the second protection part 34 of the second branch part branch line 30 have a circular cross section in a plane substantially orthogonal to the extending direction of the electric wire. Is formed.

  According to the wire harness 1 configured as described above, the common circuit wiring 10 having the protection part 12, the first branch part branch line 20 having the protection part 22, and the second branch part branch line 30 having the protection part 32. Therefore, since the branch source line 2 and the branch line 3 are configured, the branch portions of the wire harness 1 can be appropriately protected by the protection portions 12, 22, and 32 without complicating the manufacturing process. Moreover, since the common circuit wiring 10, the 1st branch part branch line 20, and the 2nd branch part branch line 30 can each be manufactured using a metal mold | die, the manufacturing error of the wire harness 1 can be suppressed. .

  Combining the common circuit wiring 10 with the first branch part branch line 20 and the second branch part branch line 30 selected from a plurality of types of the first branch part branch line 20 and the second branch part branch line 30. Thus, the wire harness 1 adapted to various circuit specifications can be easily manufactured. Since the common circuit wiring 10, the first branch part branch line 20, and the second branch part branch line 30 can be assembled in a stable state, the quality of the wire harness 1 is improved.

  By manufacturing the wire harness 1 by assembling the common circuit wiring 10, the first branching part branch line 20, and the second branching part branch line 30, the electric wire that generates noise interference and the other electric wires are protected by the protection unit 12, Since the distance between the electric wires that are divided by 22 and 32 and cause noise interference and the other electric wires are increased, noise interference can be suppressed. Since the common circuit wiring 10 is commonly used regardless of the circuit specifications of the first branch part branch line 20 and the second branch part branch line 30 when the wire harness 1 is manufactured, the productivity of the common circuit wiring 10 is improved. improves. In addition, since the first branch portion branch line 20 and the second branch portion branch line 30 are different depending on the circuit specifications, the first branch portion branch line 20 and the second branch portion branch are formed on a production line different from the common circuit wiring 10. By manufacturing the line 30 and assembling the common circuit wiring 10, the first branch branch line 20, and the second branch branch line 30, the completion rate can be improved.

<Manufacturing method>
Embodiment which concerns on the manufacturing method of the wire harness 1 is described.

  The wire harness 1 includes a step (a) of forming the common circuit wiring 10 having the protection part 12 by hot pressing with the nonwoven fabric 12 a covering the electric wire 11, and the nonwoven fabric 23 a covering the electric wire 21. The mold used in the step (b) and the step (b) for forming the first branch portion branch line 20 having the protection portion 22 bent at a substantially right angle by being hot-pressed in step (b) are shared. The step (c) of forming the second branch portion branch wire 30 having the protection portion 32 bent at a substantially right angle by hot pressing the nonwoven fabric covering the electric wire 31, and the common circuit wiring 10 And the one end side part of the first branch part branch line 20 and the one end side part of the second branch part branch line 30 are assembled to produce the branch source line 2, and the other end side part of the first branch part branch line 20 Branch line by assembling the other end portion of the second branch part branch line 30 It can be produced by a production method and a step (d) of producing.

  A method for manufacturing the wire harness 1 will be described. First, the common circuit wiring 10, the first branch portion branch line 20, and the second branch portion branch line 30 are formed.

  FIG. 5 is a schematic perspective view showing an example of a hot pressing mold 50 for manufacturing the common circuit wiring 10. Note that the shape of the hot press mold 50 is determined according to the shape of the protection part to be manufactured, and FIG. 5 shows the hot part used to manufacture the protection part 12 having the shape illustrated in FIG. A pressing mold 50 is shown.

  The hot pressing mold 50 includes a lower mold 51 and an upper mold 54. The lower mold 51 is a long member formed of a metal or the like having excellent thermal conductivity, and a lower mold surface 52 is formed on one main surface (upper surface) thereof. The lower mold surface 52 generally includes a groove 53 having a circular cross section that opens at the top and both ends. The length of the groove 53 in the extending direction is formed substantially the same as the length of the portion to be protected in the electric wire 11 (the portion to be covered with the protective portion 12 in the electric wire 11).

  The upper die 54 is a long member formed of a metal or the like having excellent thermal conductivity. A convex portion 55 is formed on one main surface (lower surface), and the lower surface is formed on the upper die surface 56. . The upper mold surface 56 is formed in a rectangular shape capable of closing the upper opening of the lower mold surface 52, and is disposed in the lower mold surface 52, so that the upper mold surface 56 is located between the upper mold surface 56 and the lower mold surface 52. The non-woven fabric 12a is compression-molded into a semicircular cross section.

  The lower mold 51 and the upper mold 54 are provided with a heater 57 (see FIG. 6) as a heating device. The heater 57 heats the lower mold surface 52 and the upper mold surface 56 to a temperature lower than the melting point of the basic fiber and higher than the melting point of the adhesive resin. For example, the heater 57 may be embedded in the lower mold 51 and the upper mold 54, or may be attached to the outer surface of the lower mold 51 and the upper mold 54 in a form capable of transferring heat. Good.

  A method for manufacturing the common circuit wiring 10 using the hot pressing mold 50 will be described. After the electric wire 11 is wired along a predetermined wiring line, the nonwoven fabric 12a is wound around the electric wire. As shown in FIG. 6, the electric wire 11 and the nonwoven fabric 12 a are disposed on the lower mold surface 52 of the lower mold 51. Specifically, the portion surrounded by the nonwoven fabric 12 a in the electric wire 11 is placed along the extending direction of the groove 53 of the lower mold surface 52.

  Next, as shown in FIG. 7, in a state where the lower mold 51 and the upper mold 54 are heated by the heater 57, the lower mold 51 and the upper mold 54 are moved close to each other, and pressure is applied therebetween. Then, the nonwoven fabric 12a is compressed in a state where the electric wire 11 is covered. Thereby, the protection part 12 having a semicircular cross section is formed. Thereafter, the lower mold 51 and the upper mold 54 are moved away from each other, and the common circuit wiring 10 is taken out from both. Cooling after hot pressing may be performed in a state existing between the lower mold 51 and the upper mold 54, or may be performed in a state of being removed from between them.

  FIG. 8 is a schematic plan view showing an example of a hot pressing mold 60 for manufacturing the first branch part branch line 20 and the second branch part branch line 30. The shape of the hot press mold 60 is determined in accordance with the shape of the protection part to be manufactured. In FIG. 8, the protection parts 22 and 32 having the shapes illustrated in FIGS. 3 and 4 are manufactured. A hot press mold 60 used to do this is shown. Hereinafter, the case where the protection part 22 is manufactured will be described.

  The hot press mold 60 includes a lower mold 61 and an upper mold 64. The lower mold 61 is a long member formed of a metal or the like having excellent thermal conductivity, and a lower mold surface 62 is formed on one main surface (upper surface) thereof. The lower mold surface 62 generally has grooves 63 that open upward and at both ends. The groove 63 is formed in a substantially L shape in plan view, and the length in the extending direction of the groove 63 is formed substantially the same as the length of the portion to be protected in the electric wire 21 (the portion to be covered by the protective portion 22 in the electric wire 21). ing.

  The upper mold 64 is a long member formed of a metal or the like having excellent thermal conductivity, and an upper mold surface 65 is formed on one main surface (lower surface) thereof. When the upper mold surface 65 is arranged so as to be continuous with the lower mold surface 62, the upper mold surface 65 and the lower mold surface 62 are formed so as to have a semicircular cross section. The non-woven fabric 23a is compression-molded into a semicircular cross section between the upper mold surface 65 and the lower mold surface 62 by moving 64 close.

  The lower mold 61 and the upper mold 64 are provided with a heater 66 (see FIG. 9) as a heating device. The heater 66 heats the lower mold surface 62 and the upper mold surface 65 to a temperature lower than the melting point of the basic fibers and higher than the melting point of the adhesive resin. For example, the heater 66 may be embedded in the lower mold 61 and the upper mold 64, or may be attached to the outer surface of the lower mold 61 and the upper mold 64 in a form capable of transferring heat. Good.

  The manufacturing method of the 1st branch part branch line 20 using the shaping | molding die 60 for hot press is demonstrated. After wiring the electric wire 21 along a predetermined wiring line, the non-woven fabric 23 a is wound around the electric wire 21. As shown in FIG. 9, the electric wire 21 and the nonwoven fabric 23 a are disposed on the lower mold surface 62 of the lower mold 61. Specifically, the portion surrounded by the nonwoven fabric 23 a in the electric wire 21 is placed along the extending direction of the groove 63 of the lower mold surface 62.

  Next, as shown in FIG. 10, in a state where the lower mold 61 and the upper mold 64 are heated by the heater 66, the lower mold 61 and the upper mold 64 are moved close to each other, and pressure is applied therebetween. Then, the nonwoven fabric 23a is compressed in a state where the electric wire 21 is covered. Thereby, the protection part 22 with a semicircular cross section is formed. Thereafter, the lower die 61 and the upper die 64 are moved away from each other, and the first branch portion branch line 20 is taken out from both. Cooling after hot pressing may be performed in a state existing between the lower mold 61 and the upper mold 64, or may be performed in a state of being removed from between them. A plurality of types of first branch portion branch lines 20 are manufactured by the same method.

  Since the manufacturing method of the 2nd branch part branch line 30 is the same as that of the case of the 1st branch part branch line 20, description is abbreviate | omitted about the specific manufacturing method.

  Next, the common branch line 2 is manufactured by assembling the common circuit wiring 10, the one end side portion of the first branch portion branch line 20, and the one end side portion of the second branch portion branch line 30 to produce the first branch portion branch line. The other end side part of 20 and the other end side part of the 2nd branch part branch line 30 are assembled | attached, and the branch line 3 is manufactured. For example, one type of the first branch unit branch line 20 and the second branch unit branch line 30 are selected from the plurality of types of the first branch unit branch line 20 and the second branch unit branch line 30, and the common circuit wiring 10 In the state where the flat surface 25 of the first protective portion 23 of the first branching branch line 20 is in close contact with the one end side portion of the flat surface 13 of the protective portion 12, the branch portion 4 in the protective portion 12 and the first protective portion 23. The binding part 40 is attached to the outside in the longitudinal direction, and the common circuit wiring 10 and the first branch part branch line 20 are assembled.

  In the state where the flat surface 35 of the first protective portion 33 of the second branch portion branch line 30 is in close contact with the other end portion of the flat surface 13 of the protective portion 12 of the common circuit wiring 10, the protective portion 12 and the first protective portion. In 33, the binding part 41 is attached to the outside in the longitudinal direction from the branch part 4, and the common circuit wiring 10 and the second branch part branch line 30 are assembled. Finally, in a state where the flat surface 26 of the second protection part 24 of the first branch part branch line 20 and the flat surface 36 of the second protection part 34 of the second branch part branch line 30 are in close contact, the first branch part. By attaching the bundling portion 42 to the outside in the longitudinal direction of the branch line 20 and the second branch portion branch line 30 from the branch portion 4 and assembling the first branch portion branch line 20 and the second branch portion branch line 30, The harness 1 is manufactured.

  As described above, according to the method for manufacturing the wire harness 1, the first branch part branch line 20 and the second branch part branch line 30 have the same shape, so that the mold can be shared and productivity can be improved. In addition, the manufacturing cost can be suppressed. In addition, the common circuit wiring 10 is combined with the first branch branch line 20 and the second branch branch line 30 selected from a plurality of types of first branch branch lines 20 and second branch branch lines 30. Thereby, the wire harness 1 matched with various circuit specifications can be manufactured easily.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Wire harness 2 Branching source line 3 Branching line 4 Branching part 10 Common circuit wiring 12a, 23a Nonwoven fabric 20 1st branching part branch line 30 2nd branching part branch line

Claims (5)

A wire harness in which a branch line branches from a branch part in the middle of a branch source line,
Circuit wiring having a protective portion formed by hot pressing the nonwoven member covering the electric wire;
A non-woven member comprising a first branch part branch line and a second branch part branch line having a protective part formed by hot pressing in a state of covering the electric wire,
The branch wiring is configured by the circuit wiring, one end side portion of the first branch portion branch line, and one end side portion of the second branch portion branch line, and the other end side portion of the first branch portion branch line; The wire harness in which the branch line is configured by the other end portion of the second branch part branch line. The wire harness according to claim 1,
The wire harness in which the first branch part branch line and the second branch part branch line can be selected from a plurality of types of first branch part branch lines and second branch part branch lines, respectively. The wire harness according to claim 1 or claim 2,
The wire harness in which the protection part of the circuit wiring and the first and second branch part branch lines is formed in a semicircular cross section on a surface substantially orthogonal to the extending direction of the electric wire. A method of manufacturing a wire harness in which a branch line branches from a branch part in the middle of a branch source line,
(A) forming a circuit wiring having a protective part by hot pressing in a state where the non-woven member covers the electric wire; and
(B) forming a first branch portion branch having a protective part bent at a substantially right angle by hot pressing with the nonwoven member covering the electric wire;
(C) A second branch branch having a protective part bent substantially at right angles by sharing the mold used in the step (b) and hot pressing the non-woven member covering the electric wire. Forming a wire mold;
(D) manufacturing the branch source line by assembling the circuit wiring, the one end side portion of the first branch portion branch line, and the one end side portion of the second branch portion branch line; Assembling the other end side part of the branch line and the other end side part of the second branch part branch line to manufacture the branch line;
A method of manufacturing a wire harness comprising: A method of manufacturing a wire harness in which a branch line branches from a branch part in the middle of a branch source line,
(E) forming a circuit wiring having a protective part by hot pressing in a state where the nonwoven member covers the electric wire; and
(F) forming a plurality of types of first branch branch lines having a protective portion by hot pressing in a state where the nonwoven member covers the electric wire;
(G) forming a plurality of types of second branch branch lines having a protective part by hot pressing in a state in which the nonwoven member covers the electric wire;
(H) selecting one kind of first branch part branch line and second branch part branch line from the plurality of types of first branch part branch lines and second branch part branch lines; One end side portion of one branch portion branch line and one end side portion of the second branch portion branch line are assembled to produce the branch source line, and the other end side portion of the first branch portion branch line and the first portion Assembling the other end side part of the two branch part branch line and manufacturing the branch line;
A method of manufacturing a wire harness comprising:

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