JP2018156878A - Method of forming wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of forming a wire harness capable of obtaining a wire harness having a required cordage-arranging shape with a highly versatile jig table.SOLUTION: The method includes: a first process of winding a sheet 5 containing a curable resin around an outer periphery of a plurality of electric wires 3 to form a wire bundle 7; a second process of arranging the wire bundle 7 onto a plurality of movable forks 9 movably arranged on a jig table 15; a third process of moving required movable folks 9 on the jig table 15 to form the wire bundle 7 into a required cordage-arranging shape; and a fourth process of curing the curable resin and holding a cordage-arranging shape of the wire bundle to form a wire harness 1.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a wire harness and a method of manufacturing a wire harness. Specifically, the present invention relates to a wire harness forming method in which a plurality of electric wires are integrated and solidified into a predetermined shape.

  Conventionally, as a wire harness forming method, both ends of a plurality of electric wires are fixed to a pair of flat alignment members, and one flat alignment member is moved to apply tension to the plurality of electric wires. Is wrapped in a sheet coated with hot melt adhesive, the sheet is sandwiched between the upper mold and the lower mold and heated to melt the hot melt adhesive, and the molten hot melt adhesive is cured to form a wire harness. Those are known (for example, see Patent Document 1).

  In this wire harness molding method, by applying tension to a bundle of wires in which a sheet is wound around the outer periphery of a plurality of wires fixed to a pair of flat alignment members, the wires are closely adhered to each other and arranged at high density. A wire harness can be obtained.

  On the other hand, as another wire harness forming method, an ultraviolet curable resin wound around an electric wire group by irradiating ultraviolet rays in a state where the electric wire group is arranged on an electric wire holding jig arranged according to the shape of the vehicle body panel. Is known, and a wire group is formed into a predetermined shape (for example, see Patent Document 2).

Japanese Patent Laid-Open No. 10-283857 JP-A-2015-42073

  By the way, in the wire harness forming method as in Patent Document 1, the wire bundle is formed in a straight line. However, depending on the arrangement of the wire harness in a vehicle or the like, the wire bundle is bent into a desired routing shape to wire. It is necessary to form the harness.

  In order to form a wire harness bent in such a desired wiring shape, it is necessary to sandwich and heat an electric wire bundle between an upper mold and a lower mold formed in the desired wiring shape. The mold had to be molded to the desired routing shape.

  On the other hand, in the wire harness forming method as in Patent Document 2, for each type of wire harness, a jig base must be provided in accordance with the wiring shape of the wire harness. The wiring work was complicated.

  Then, this invention aims at provision of the wire harness shaping | molding method which can obtain the wire harness of desired wiring shape with a highly versatile jig stand.

  The invention described in claim 1 includes a first step in which a sheet containing a curable resin is wound around the outer periphery of a plurality of electric wires to form an electric wire bundle, and a plurality of movable forks arranged to be movable on a jig base. A second step of arranging the wire bundle, a third step of moving the desired movable fork on the jig base to form the wire bundle in a desired routing shape, curing the curable resin, and And a fourth step of forming a wire harness while maintaining the wiring shape of the wire bundle.

  In this wire harness forming method, in the second step, the electric wire bundle is arranged on a plurality of movable forks arranged so as to be movable on the jig table. Therefore, in the third step, a desired movable fork is placed on the jig table. By moving it, the wire bundle can be formed in a desired wiring shape.

  For this reason, in the third step, it is not necessary to provide a mold according to a desired routing shape and a jig table on which a fork that cannot be moved according to the desired routing shape is provided. The wire bundle can be arranged in a desired wiring shape.

  Therefore, in such a wire harness forming method, the wire bundle can be formed in a desired routing shape by moving a plurality of movable forks arranged to be movable on one jig base. A wire harness having a desired routing shape can be obtained with a high jig base.

  Invention of Claim 2 is the wire harness shaping | molding method of Claim 1, Comprising: The said curable resin consists of hot melt, The said hot melt is heated and fuse | melted after the said 3rd process, Cured in the fourth step.

  In this wire harness molding method, since the curable resin is made of hot melt, it is only necessary to heat the bundle of wires arranged in the desired routing shape in the third step to melt the hot melt, and easily The wire harness formed in the wiring shape can be obtained.

  According to the present invention, it is possible to provide a wire harness forming method capable of providing a wire harness having a desired routing shape with a highly versatile jig base.

It is sectional drawing of the wire bundle in the wire harness shaping | molding method which concerns on embodiment of this invention. (A) is a perspective view of the braided sheet | seat in the wire harness shaping | molding method which concerns on embodiment of this invention. (B) is a perspective view of a topping type sheet in the wire harness forming method according to the embodiment of the present invention. It is a perspective view when an electric wire bundle is arrange | positioned to the shaping | molding jig | tool in the wire harness shaping | molding method which concerns on embodiment of this invention. It is a perspective view when operating the movable fork of the forming jig in the wire harness forming method according to the embodiment of the present invention. It is a perspective view when an electric wire bundle is heated with the heating means of the shaping | molding jig in the wire harness shaping | molding method which concerns on embodiment of this invention. It is a perspective view of the wire harness shape | molded with the wire harness shaping | molding method which concerns on embodiment of this invention. It is a flowchart which shows the wire harness shaping | molding method which concerns on embodiment of this invention.

  A wire harness forming method according to an embodiment of the present invention will be described with reference to FIGS.

  In the wire harness forming method according to the present embodiment, the first step of forming the wire bundle 7 by winding the sheet 5 containing a curable resin around the outer periphery of the plurality of wires 3 and the jig base 15 can be moved. A second step of arranging the wire bundle 7 on the plurality of movable forks 9 arranged, and a third step of moving the desired movable fork 9 on the jig base 15 to form the wire bundle 7 in a desired routing shape; And a fourth step of curing the curable resin to form the wire harness 1 while maintaining the wiring shape of the wire bundle.

  The curable resin is made of hot melt, and the hot melt is heated and melted after the third step, and is cured in the fourth step.

  As shown in FIGS. 1 to 7, the wire harness 1 includes a plurality of electric wires 3 and a sheet 5 wound around the outer periphery of the plurality of electric wires 3.

  The plurality of electric wires 3 are each composed of a covered electric wire in which the outer circumferences of the plurality of core wires are covered with an insulating coating made of an insulating material.

  For example, the electric wire 3 is disposed between a power source mounted on the vehicle and the device, or between the device and the device, and electrically connects the power source and the device or between the device and the device. .

  In such a state that a plurality of such electric wires 3 are bundled, a sheet 5 is wound around the outer periphery to constitute an electric wire bundle 7.

  The sheet 5 is made of a sheet containing a hot melt knitted with a hot melt as a curable resin (see FIG. 2A) or a topping type with a hot melt embedded (see FIG. 2B). .

  The sheet 5 is wound around the outer circumferences of the plurality of electric wires 3 to form the electric wire bundle 7, and when heated, the hot melt is melted and flows into the fibers constituting the plural electric wires 3 and the sheets 5. .

  The molten hot melt is cured by being air-cooled, and maintains a desired cross-sectional shape and a desired routing shape in the wire bundle 7 to form the wire harness 1.

  Such a cross-sectional shape and wiring shape of the wire harness 1 are formed by the forming jig 11.

  The forming jig 11 includes a jig base 15, a plurality of (here, five) movable forks 9, and a heating means 13.

  The jig base 15 is formed in a casing shape having a flat surface, and houses therein a drive source (not shown) that drives the plurality of movable forks 9 to be movable.

  Each of the plurality of movable forks 9 is provided so as to be movable in the plane direction with respect to the plane of the jig table 15, and a holding portion 17 is provided at an end opposite to the jig table 15.

  The holding | maintenance part 17 has the concave accommodating part provided so that the electric wire bundle 7 could be accommodated, and the cover part provided in this accommodating part so that opening and closing was possible via a hinge.

  This holding part 17 shape | molds the cross-sectional shape of the wire bundle 7 by accommodating the wire bundle 7 in an accommodating part, and hold | maintains the cross-sectional shape of the wire bundle 7 by obstruct | occluding a accommodating part with a cover part.

  Such a plurality of movable forks 9 hold the wire bundle 7 with the holding portion 17 and match the desired routing shape of the wire harness 1, for example, as shown by the arrows in FIG. Move 15 up.

  In this way, by moving the plurality of movable forks 9 holding the wire bundle 7 in the plane direction on the jig base 15 to obtain a desired wiring shape of the wire harness 1, It is not necessary to use a jig base on which a non-movable fork is arranged according to the wiring shape, and a single jig base 15 can correspond to various wiring shapes of the wire harness 1.

  The wire bundle 7 formed in a desired routing shape by the plurality of movable forks 9 moving on the jig table 15 is heated by the heating means 13.

  The heating means 13 is disposed in the vicinity of the plurality of movable forks 9, operates the plurality of movable forks 9, irradiates heat to the wire bundle 7 formed in a desired routing shape, and is contained in the sheet 5. The hot melt is melted.

  The hot melt melted by the heating means 13 is impregnated into the gaps between the plurality of electric wires 3 and the fibers constituting the sheet 5 and cured by air cooling to form a desired cross-sectional shape or a desired routing shape. The obtained wire harness 1 can be obtained.

  In the forming method of the wire harness 1 in such a forming jig 11, as shown in the flowchart of FIG. 7, first, the sheet 5 is wound around the outer periphery of the plurality of wires 3 to form the wire bundle 7 (first step ( S1)).

  Next, the wire bundle 7 is held by the holding portions 17 of the plurality of movable forks 9, and the wire bundle 7 is arranged on the plurality of movable forks 9 on the jig base 15 (second step (S2)).

  Next, according to a desired wiring shape, the several movable fork 9 is moved on the jig stand 15, and the wire bundle 7 is formed in a desired wiring shape (3rd process (S3)).

  Next, heat is irradiated by the heating means 13 with respect to the wire bundle 7 formed in the desired wiring shape, and the hot melt contained in the sheet 5 is melted (S4).

  And the heating by the heating means 13 is stopped, the electric wire bundle 7 is air-cooled, the hot melt melted is cured, and the wire harness 1 having a desired cross-sectional shape and a desired routing shape is formed (fourth step ( S5)).

  In such a wire harness forming method, since the wire bundle 7 is arranged on the plurality of movable forks 9 movably arranged on the jig table 15 in the second step, the wire bundle 7 is formed on the jig table 15 in the third step. Thus, by moving the desired movable fork 9, the wire bundle 5 can be formed in a desired wiring shape.

  For this reason, in the third step, there is no need to provide a mold adapted to a desired arrangement shape or a jig table on which a non-movable fork is arranged according to the desired arrangement shape. The electric wire bundle 9 can be arranged in a desired wiring shape.

  Therefore, in such a wire harness forming method, the wire bundle 7 can be formed in a desired routing shape by moving the plurality of movable forks 9 movably arranged on one jig base 15. The wire harness 1 having a desired wiring shape can be obtained with the highly versatile jig table 15.

  In addition, since the curable resin is made of hot melt, the hot melt can be melted by heating the wire bundle 7 arranged in the desired wiring shape in the third step. The formed wire harness 1 can be obtained.

  In the wire harness forming method according to the embodiment of the present invention, there are five movable forks arranged to be movable on the jig base. The number of movable forks may be set as appropriate according to the wire harness to be obtained.

  The curable resin is hot melt, but is not limited thereto, and may be an ultraviolet curable resin.

  When the curable resin is an ultraviolet curable resin, the heating means is an ultraviolet irradiation means, and the electric wire bundle formed in a desired wiring shape by moving the movable fork is irradiated with ultraviolet rays by the ultraviolet irradiation means, An ultraviolet curable resin may be cured.

  Furthermore, the movable fork can be moved in the plane direction on the jig base. However, the present invention is not limited to this, and in addition to the movement in the plane direction, the movable fork is moved in the height direction (vertical direction) of the jig base. It may be arranged as possible.

DESCRIPTION OF SYMBOLS 1 ... Wire harness 3 ... Electric wire 5 ... Sheet 7 ... Electric wire bundle 9 ... Movable fork 15 ... Jig stand

Claims (2)

  A first step of wrapping a sheet containing a curable resin around the outer periphery of a plurality of electric wires to form an electric wire bundle, and a second step of arranging the electric wire bundle on a plurality of movable forks arranged to be movable on a jig base. A third step of moving the desired movable fork on the jig base to form the wire bundle in a desired routing shape, and curing the curable resin to maintain the routing shape of the wire bundle And forming a wire harness, and a fourth step of forming the wire harness. The wire harness forming method according to claim 1,
The curable resin consists of hot melt,
The method of forming a wire harness, wherein the hot melt is heated and melted after the third step and cured in the fourth step.

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