JP2014086304A - Wire harness, method for producing wire harness, and hollow forming fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness easily bendable and easy to be assembled to a vehicle, a method for producing the wire harness, and a hollow forming fixture.SOLUTION: The wire harness 11 comprises: a plurality of cables 13; a tape 17 wound around the outer circumference of the bundled cables 13; and winding-tightening relaxation spaces 19 formed among the cables 13 by removing a hollow forming shaft 15 tape-wound and bundled together with the cables 13 from the wire bundle of the cables 13.

Description

  The present invention relates to a wire harness.

  A wire harness used for automobiles or the like is formed by bundling a large number of electric wires, and a tape is wound around the bundled electric wires for bundling and protection (for example, see Patent Document 1). In such tape winding, as shown in FIG. 6, the side edges 503 of the tape 509 wound around the outer periphery of the bundled plural covered electric wires (electric wires) 501 are successively polymerized in small amounts (for example, half the tape width). Thus, half-wrapping is generally performed manually by winding in a spiral shape.

  In the wire harness 505, a plurality of bundled covered electric wires 501 are wound with a tape 509, and a jacket 507 is formed by the tape 509 wound around the outer periphery. As the tape 509, an adhesive tape is used, and a non-adhesive tape may be used because it is inexpensive and easy to wind. When non-adhesive tape is used, the winding start portion is wrapped with the non-adhesive tape, so the terminal at the beginning of winding is fixed at the second winding portion, but cannot be fixed at the terminal at the end of winding. Using an adhesive tape, the adhesive tape is wound around the outer periphery of the winding end of the non-adhesive tape to fix the terminal.

JP-A-8-249935

  However, when the vehicle production place is a cold region or in the winter season, the wire harness 505 becomes hard and difficult to bend, and the assembly property to the vehicle is not good. In particular, in the case of the wire harness 505 having a large diameter, the assemblability is remarkably lowered. The reason for this is that, in addition to the hardness of the resin coating being increased at low temperatures, the bundled plural covered electric wires 501 are tightly wound and closely adhered by the tape 509, and the relative movement at the time of bending is hindered by friction. For example, the bending resistance is increased. As a countermeasure for this, the wire harness 505 is warmed by a warming machine before being assembled to the vehicle, which contributes to an increase in manufacturing cost.

  This invention is made | formed in view of the said condition, The objective is to provide the manufacturing method of a wire harness and a wire harness which are easy to bend and to be assembled | attached to a vehicle, and a hollow formation jig | tool.

The above object of the present invention is achieved by the following configuration.
(1) A plurality of electric wires, a tape wound around an outer periphery of the bundled wires, and a hollow forming shaft that is bundled with the wires together with the tape are extracted from the wire bundle of the wires. A wire harness comprising: a tight tightening space formed between each other.

  According to the wire harness having the above configuration (1), the electric wires inside the electric wire bundle bundled with the tape can be easily separated from each other by the tightening relaxation space formed by the removed hollow forming shaft. Can do. That is, the tight tightening space formed inside the wire harness initially has an opening cross section substantially the same as the cross-sectional shape of the hollow forming shaft extracted from the wire bundle, but the electric wires gradually vary. By opening, it becomes an unspecified opening cross section. Therefore, the wire harness has a structure in which the electric wires are not in close contact with each other in a state in which the cross section is uniform with the outer cover of the tape wound around the outer periphery as a contour. When a bending moment is applied to such a wire harness, the outer side generates a tensile stress and expands, and the inner side generates a compressive stress and contracts. At this time, in the wire harness, since the relative movement between the separated electric wires is less likely to be hindered by friction due to winding, the bending resistance can be reduced. Thereby, the wire harness has a degree of freedom and is easy to bend.

(2) A step of bundling a plurality of electric wires on a hollow forming shaft, a step of winding a tape around the outer circumference of the bundle of electric wires of the bundled wires, and removing the hollow forming shaft from the electric wire bundle, Forming a winding tightening relaxation space to be spaced apart from each other.

  According to the method of manufacturing the wire harness having the configuration (2), the hollow forming shaft is bundled together with the plurality of electric wires, and the outer periphery of the electric wire bundle is wound with the tape to form the outer jacket. In this state, a plurality of electric wires and a hollow forming shaft are tightly bundled inside the outer jacket of the wound tape. When the hollow forming shaft is removed from the electric wire bundle, the portion becomes a cavity, and the electric wire that is in close contact with the hollow forming shaft is moved into the cavity. As a result, the electric wires are separated from each other, and an arbitrary gap newly formed between the electric wires becomes a tightening relaxation space. The total cross-sectional area of the tightening relaxation space is equal to the cross-sectional area perpendicular to the axis of the hollow forming shaft. Therefore, even when a plurality of wire harnesses are manufactured, the total cross-sectional area of the tightening relaxation space becomes equal, and a wire harness with the same bendability can be obtained with a uniform wire density.

(3) One end side of a plurality of electric wires is bundled on the hollow forming shaft portion, a tape is spirally wound around the outer peripheral side of the electric wire on the distal end side of the hollow forming shaft portion, and the winding end of the tape is the hollow forming shaft After reaching the base end side of the portion, the hollow forming shaft portion is shifted to the other end side of the electric wire, and the tape is spirally wound around the outer peripheral side of the electric wire at the distal end side of the hollow forming shaft portion. A method of manufacturing a wire harness, wherein the wire harness is repeated for a predetermined length.

  According to the method of manufacturing the wire harness having the configuration of (3) above, the hollow forming shaft portion shorter than the predetermined length of the electric wire is used, and the predetermined length of the electric wire is shifted while shifting the hollow forming shaft portion to the other end side of the electric wire. The tape winding operation of winding the tape spirally around the outer periphery of the electric wire bundled in the hollow forming shaft is repeated. Thereby, compared with the case where the long hollow forming shaft of the length substantially the same as an electric wire is used, the force at the time of extracting a hollow forming shaft part from an electric wire bundle can be made small, and workability | operativity becomes favorable.

(4) Formed in a substantially T shape by a hollow forming shaft portion in which a plurality of electric wires are bundled on the outer periphery and a grip portion extending orthogonally to one end of the hollow forming shaft portion. A hollow forming jig characterized by being made.

  According to the hollow forming jig having the configuration of the above (4), the hollow forming shaft portion can be prevented from moving up and down by gripping the grip portion, and the hollow forming shaft portion can be placed at the center of the electric wire bundle composed of a plurality of electric wires. Can be arranged. As a result, it is easy to form a uniform tightening relaxation space.

  According to the wire harness, the method for manufacturing the wire harness, and the hollow forming jig according to the present invention, it is possible to obtain a wire harness that can be easily bent and assembled to a vehicle.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

It is a principal part perspective view explaining the manufacturing method of the wire harness which concerns on 1st Embodiment of this invention, (a) shows before the hollow formation axis | shaft is extracted, (b) is the hollow formation axis | shaft extracted. Shown later. It is a principal part front view explaining the manufacturing method of the wire harness which concerns on 2nd Embodiment of this invention. It is a front view showing the usage method of the hollow formation jig | tool of this embodiment shown in FIG. It is a perspective view in the middle of manufacture of the wire harness using the hollow formation jig | tool shown in FIG. (A) is an AA cross section arrow view of FIG. 4, (b) is a BB cross section arrow view of FIG. It is a perspective view in the middle of manufacture of the conventional wire harness.

Embodiments according to the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the wire harness 11 according to this embodiment includes a covered wire 13 that is a plurality of wires, a tape 17 that is wound around the outer periphery of the bundled covered wires 13, and a hollow forming shaft 15 that is covered with wires. And a tightening relaxation space 19 formed between the electric wires by being extracted from the 13 electric wire bundles. The hollow forming shaft 15 is indispensable when forming the tightening / reducing space 19 in the process of manufacturing the wire harness 11, but is not present in the completed wire harness 11 that is removed before the completion of manufacture.

  The covered electric wire 13 has a conductor covered with a resin coating. As the hollow forming shaft 15, an elongated cylindrical body, a prismatic body or the like having a uniform cross section is used. As the tape 17, an adhesive tape or a non-adhesive tape is used.

  As shown in FIG. 1 (b), the wire harness 11 has a jacket 21 formed by a tape 17 wound spirally around the outer circumference of a plurality of bundled covered electric wires 13. The covered electric wire 13 on the inner side of the outer jacket 21 is separated by a tightening relaxation space 19. As will be described later in the method of manufacturing the wire harness 11, the tightening relaxation space 19 is extracted from the wire bundle of the covered wire 13 after the hollow forming shaft 15 bundled together with the covered wire 13 is formed with the outer sheath 21. Is formed between the electric wires.

Next, the effect | action of the wire harness 11 which has the said structure is demonstrated.
In the wire harness 11 of this embodiment, the electric wires bundled inside the outer jacket 21 are separated by a plurality of tightening relaxation spaces 19. That is, the tightening relaxation space 19 formed inside the wire harness 11 has an opening cross section that is substantially the same as the cross-sectional shape of the hollow forming shaft 15 that is initially removed from the wire bundle. Becomes an unspecified opening cross section. Therefore, the wire harness 11 has a structure in which each electric wire does not adhere to each other in a state in which the cross section is uniform with the outer cover 21 formed by the tape 17 wound around the outer periphery as a contour. Note that the structure that is not in close contact includes a structure that is in contact with the touching extent.

  When a bending moment is applied to such a wire harness 11, the outer side generates a tensile stress and expands, and the inner side generates a compressive stress and contracts. At this time, the wire harness 11 according to the present embodiment can reduce the bending resistance because the relative movement between the separated electric wires is hardly inhibited by the friction caused by the winding. Thereby, the wire harness 11 has a degree of freedom and is easily bent.

  Therefore, according to the wire harness 11 which concerns on the said embodiment, the wire harness which is easy to bend is obtained, without increasing cost, a heating machine is not required also in a cold region, and an assembly property becomes favorable. In addition, since a warmer is not required, it is possible to save space and power in a vehicle assembly plant.

Next, a method for manufacturing the wire harness 11 according to the first embodiment of the present invention will be described.
In the method of manufacturing the wire harness 11 according to the first embodiment, first, a step of arranging a plurality of covered electric wires 13 on the hollow forming shaft 15 and bundling them on the electric wire holder 25 on a jig plate (not shown). Have

  Further, as shown in FIG. 1 (a), a jacket 21 is formed in a process of winding a tape 17 around the outer circumference of the bundled covered electric wires 13 in a spiral manner. In this tape winding, like the conventional wire harness 505 shown in FIG. 6, the side edges 27 of the tape 17 wound around the outer circumference of the bundled plural covered electric wires 13 are sequentially polymerized little by little and wound in a spiral shape. Manual half-wrapping can be used.

  And as shown in FIG.1 (b), after the envelope 21 of predetermined length is formed, the hollow formation axis | shaft 15 is pulled out. The production of the wire harness 11 is completed through a process of forming the tight tightening space 19 for separating the wires by removing the hollow forming shaft 15 from the wire bundle.

According to the method for manufacturing the wire harness 11 according to the first embodiment, the hollow forming shaft 15 is bundled together with the plurality of covered electric wires 13, and the outer periphery of the electric wire bundle is wound with the tape 17 to form the outer cover 21. . In this state, the plurality of covered electric wires 13 and the hollow forming shaft 15 are tightly bundled inside the outer cover 21 formed by the wound tape 17. When the hollow forming shaft 15 is removed from the wire bundle, the portion becomes a cavity, and the covered electric wire 13 that is in close contact with the hollow forming shaft 15 is moved into the cavity. As a result, the electric wires are separated from each other, and an arbitrary gap newly formed between the electric wires becomes the tightening relaxation space 19.
The total cross-sectional area of the tightening relaxation space 19 is equal to the cross-sectional area perpendicular to the axis of the hollow forming shaft 15. Therefore, even if a plurality of wire harnesses 11 are manufactured, the total cross-sectional area of the tightening relaxation space 19 becomes equal, and the wire harness 11 having the same bendability can be obtained with a uniform wire density.

Next, the manufacturing method of the wire harness 11 which concerns on 2nd Embodiment of this invention is demonstrated.
In the method for manufacturing the wire harness 11 according to the second embodiment, as shown in FIGS. 2 and 3, a hollow forming jig 29 having a hollow forming shaft portion 31 shorter than a predetermined length of the covered electric wire 13 is used. Is done.
The hollow forming jig 29 of the present embodiment includes a hollow forming shaft portion 31 in which a plurality of covered electric wires 13 are bundled on the outer periphery, and a barrel extending orthogonally to one end of the hollow forming shaft portion 31. The grip portion 33 is formed in a substantially T shape. As shown in FIG. 3, the hollow forming jig 29 holds the grip portion 33 so that the hollow forming shaft portion 31 is sandwiched between the index finger 35 and the middle finger 37. Therefore, according to the hollow forming jig 29 of the present embodiment, it is possible to suppress the hollow forming shaft portion 31 from moving up and down by gripping the grip portion 33, and the hollow forming shaft portion 31 is an electric wire composed of the plurality of covered electric wires 13. It can be placed in the center of the bundle. As a result, it becomes easy to form a uniform tightening relaxation space 19.

  In the method of manufacturing the wire harness 11 according to the second embodiment using the hollow forming jig 29, first, as shown in FIG. Is inserted into one end side (left side in FIG. 2) of the covered electric wire 13 bundled at the tip of the hollow forming shaft portion 31 of the hollow forming jig 29, so that the outer periphery of the hollow forming shaft portion 31 is One end side of the plurality of covered electric wires 13 is bundled.

Next, the tape 17 is spirally wound around the outer peripheral side of the covered electric wire 13 on the distal end side of the hollow forming shaft portion 31. In this state, as shown in FIG. 5A, the plurality of covered electric wires 13 and the hollow forming shaft portion 31 are tightly bundled inside the outer cover 21 of the wound tape 17.
After the end of winding of the tape 17 reaches the insertion base end side of the hollow forming shaft portion 31, the hollow forming jig 29 is shifted in the removal direction (the other end direction of the covered electric wire 13) by substantially the entire length of the hollow forming shaft portion 31. The tape 17 is again spirally wound around the outer periphery of the covered electric wire 13 on the insertion tip side of the hollow forming shaft portion 31.

Then, as shown in FIG. 4, the wire harness 11 is obtained by repeating the tape winding operation for spirally winding the tape 17 around the outer periphery of the covered electric wire 13 on the insertion tip side of the hollow forming shaft portion 31 for a predetermined length of the covered electric wire 13. Is manufactured.
That is, the inner portion of the wire bundle from which the hollow forming shaft portion 31 has been removed after the outer sheath 21 is formed by the tape 17 becomes a cavity, and is in close contact with the hollow forming shaft portion 31 as shown in FIG. The covered covered electric wire 13 is moved into the cavity. As a result, the electric wires are separated from each other, and an arbitrary gap newly formed between the electric wires becomes the tightening relaxation space 19.

  According to the method for manufacturing the wire harness 11 according to the second embodiment, the hollow forming jig 29 including the hollow forming shaft portion 31 shorter than the predetermined length of the covered electric wire 13 is used. The tape winding operation of spirally winding the tape 17 around the outer periphery of the covered electric wire 13 in a state of being bundled with the hollow forming shaft portion 31 for a predetermined length of the covered electric wire 13 is repeated while shifting in the removal direction. Thereby, compared with the said 1st Embodiment using the long hollow formation shaft 15 of the length substantially the same as the covered electric wire 13, the force at the time of extracting the hollow formation shaft part 31 of the hollow formation jig 29 from an electric wire bundle is used. It can be made smaller and the workability becomes better.

  Further, the total cross-sectional area of the tightening relaxation space 19 is equal to the axial orthogonal cross-sectional area of the hollow forming shaft portion 31. Therefore, by manufacturing the long wire harness 11 while shifting the hollow forming jig 29 in the removing direction, the winding tightening relaxation space 19 has the same total cross-sectional area at any position along the longitudinal direction, and a uniform electric wire. It becomes density. As a result, the long wire harness 11 having the same easiness of bending can be obtained at any position in the longitudinal direction.

Therefore, according to the wire harness 11 which concerns on embodiment mentioned above, the wire harness which is easy to bend and can be easily assembled | attached to a vehicle can be obtained.
Moreover, according to the manufacturing method of the wire harness 11 according to the first and second embodiments, after forming the outer sheath 21 by bundling a plurality of covered electric wires 13, a certain tightening relaxation space 19 is easily provided. Thus, the covered electric wires 13 can be optimally separated from each other. As a result, a good wire harness 11 that is easy to bend can be provided.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

11 ... Wire harness 13 ... Coated wire (electric wire)
DESCRIPTION OF SYMBOLS 15 ... Hollow formation shaft 17 ... Tape 19 ... Winding tightening relaxation space 21 ... Outer cover 29 ... Hollow formation jig 31 ... Hollow formation shaft part 33 ... Grip part

Claims (4)

Multiple wires,
A tape wound around the outer circumference of the bundled wires;
A winding forming space formed between the electric wires by removing a hollow forming shaft bundled by being taped together with the electric wires from the electric wire bundle of the electric wires, and
A wire harness comprising: Bundling a plurality of wires on a hollow forming shaft;
Winding tape around the bundle of the bundled wires;
Forming a tightening relaxation space for separating the wires by removing the hollow forming shaft from the wire bundle;
The manufacturing method of the wire harness characterized by including this.   One end side of a plurality of electric wires is bundled on the hollow forming shaft portion, a tape is spirally wound around the outer peripheral side of the electric wire on the distal end side of the hollow forming shaft portion, and the winding end of the tape is the base of the hollow forming shaft portion After reaching the end side, the hollow forming shaft portion is shifted to the other end side of the electric wire, and the tape is spirally wound around the outer peripheral side of the electric wire at the distal end side of the hollow forming shaft portion. A method of manufacturing a wire harness, characterized by repeating for a predetermined length.   A hollow forming shaft portion in which a plurality of electric wires are bundled on the outer periphery and a grip portion extending perpendicularly to one end of the hollow forming shaft portion are formed in a substantially T shape. A hollow forming jig characterized by

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