JP3561113B2 - Method for manufacturing wire harness and mold used for manufacturing wire harness - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a shape-maintaining wire harness including a plurality of electric wires and a mold used for manufacturing the wire harness.
[0002]
[Prior art]
FIG. 10 shows a mold 1 used in a conventional manufacturing of a wire harness, and an upper surface thereof is a molding surface 2. The molding surface 2 is divided into three molding portions 3 for molding three wire harnesses at a time. A plurality of ribs 4 are provided upright on each molded part 3, and a space between the opposing ribs 4 is a wiring recess 5. Further, each molding portion 3 is formed with a groove portion 6 surrounding the rib 4 standing portion.
[0003]
Reference numeral 7 denotes a press plate, and a punching blade 8 is provided on the lower surface. The punching blade 8 is opposed to the groove 6 of each forming part 3 of the mold 1, and enters the opposed groove 6 by lowering the press plate 7 to the mold 1.
[0004]
To manufacture a wire harness using the mold 1, a lower mold sheet is placed on the molding surface 2, and the lower mold sheet is drawn by vacuum to conform to the shape of the wiring concave portion 5. A plurality of electric wires are routed, the upper sheet is placed on the electric wires, and the upper sheet is joined to the lower sheet by vacuum suction to maintain the shape. Thereafter, by lowering the press plate 7, the punching blade 8 is caused to enter the groove 6, and the sheet around the electric wire is cut. Thereby, a wire harness whose shape is maintained is formed.
[0005]
[Problems to be solved by the invention]
However, in such manufacturing, it is necessary to provide the punching blade 8 of the press plate 7 in alignment with the groove 6 of the mold 1. For this reason, the press plate 7 and the mold 1 need to be paired, and there is an inconvenience that the press plate 7 and the mold 1 cannot be applied to another press plate 7 or the mold 1. In addition, it is necessary to maintain the shape by vacuum suction and to cut the sheet by lowering the press plate, so that the number of processes is large and workability cannot be improved, and furthermore, contact with the punching blade 8 during manufacture. Therefore, there is also a risk of damaging or cutting a hand or finger.
[0006]
Therefore, the present invention provides a method of manufacturing a wire harness that can reduce the number of steps and improve workability by eliminating the need for a dedicated press plate, and can perform safe work. The purpose is to: Another object of the present invention is to provide a mold that can be suitably used in this manufacturing method.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the manufacturing method according to the first aspect of the present invention is directed to a manufacturing method according to the present invention, wherein an electric wire is interposed between upper and lower sheets, and the electric wires are arranged in a routing recess of the mold, and the upper and lower sheets are sucked from the mold by vacuum suction. A cutter blade for cutting a sheet outside the wiring concave portion, and cutting at least one sheet with the cutter blade by the suction force of the vacuum suction. It is characterized by doing.
[0008]
In the present invention, the sheet is brought into contact with the cutter blade by using the vacuum suction force for holding the shape, and the sheet is cut. Therefore, the joining of the sheet for holding the shape and the cutting of the sheet are vacuum suctioned. Can be performed continuously. For this reason, it is not necessary to lower the press plate, and workability is improved. Further, since a press plate having a punching blade is not required, it is safe.
[0009]
The mold of the invention according to claim 2 has a routing concave portion for routing a wire harness composed of a plurality of electric wires on a predetermined path on a molding surface, and the electric wire is sandwiched between upper and lower sheets, and A mold, which is disposed in the wiring recess and connected to upper and lower sheets by vacuum suction, wherein the cutter blade, at least one of which is in contact with and cut by the suction force of the vacuum suction, It is characterized in that it is provided outside the cable recess.
[0010]
In this mold, the sheet is cut by contacting a cutter blade provided outside the wiring recess with a vacuum suction force for maintaining the shape. For this reason, it can be suitably used for a manufacturing method in which sheet joining and sheet cutting are performed continuously. Further, since a press plate is not required, the entire manufacturing apparatus can be simplified.
[0011]
A third aspect of the present invention is the invention according to the second aspect, wherein a groove is formed outside the wiring recess, and the cutter blade is provided in the groove.
[0012]
Since the cutter blade is provided in the groove provided outside the wiring concave portion, the cutter blade is not exposed, which is safe.
[0013]
The invention according to claim 4 is the invention according to claim 2 or 3, wherein the wiring recess is provided in a rib erected on the molding surface.
[0014]
Since the wiring concave portion is formed only by erection of the rib on the molding surface, it is not necessary to form the wiring concave portion by depressing the molding surface, and the wiring concave portion can be easily formed. Further, it is possible to easily change the wiring concave portion by replacing the rib or changing the rib standing position. Therefore, a versatile mold can be obtained.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
1 and 2 show a mold according to an embodiment of the present invention, and FIGS. 3 to 9 show the manufacture of a wire harness in the order of steps.
[0016]
The upper surface of the mold 11 is a molding surface 12. The mold 1 of this embodiment is for molding three wire harnesses at a time. For this reason, the molding surface 12 is divided into three molding portions 13, and each molding portion 13 has A recess 14 is formed.
[0017]
The wiring recess 14 is for wiring the electric wire 17 (see FIG. 4). The wiring recesses 14 are formed by erected a plurality of ribs 15 and 16 on each molding portion 13 so as to face each other. Has become. In the structure in which the wiring recesses 14 are formed by erecting the ribs 15 and 16 on the molding surface 12 as described above, it is not necessary to form the molding recesses 14 by forming the molding surface 12 into recesses. The recess 14 can be easily manufactured. Further, it is possible to easily change the wiring concave portion by replacing the ribs 15 and 16 or changing the rib standing position.
[0018]
In this embodiment, one rib 15 is continuous and long, while the other rib 16 is short and adjacent ribs 16 are separated. A predetermined electric wire is routed so as to branch off from between the separated ribs 16.
[0019]
In addition, a groove 18 is formed in each molded part 13. The groove 18 is provided outside the wiring recess 14. In this embodiment, the groove 18 is provided so as to surround the erected portions of the ribs 15 and 16 in each molded portion 13. The groove 18 is for sucking a sheet used for maintaining the shape, and a cutter blade 19 is disposed inside the groove 18 as shown in FIG.
[0020]
The cutter blade 19 cuts the sheet sucked by the groove 18. The cutter blade 19 stands upright from the bottom of the groove 18, but its tip does not protrude from the groove 18, and is entirely located in the groove 18. For this reason, the operator's hands and fingers do not come into contact with the cutter blade 19, which is safe.
[0021]
Although not shown, the mold 11 is provided with a suction hole that opens at the wiring recess 14 in order to depressurize the wiring recess 14, and this suction hole is connected to a suction device such as a decompression pump. Have been. The mold 11 and the ribs 15 and 16 can be heated by incorporating a heater or the like.
[0022]
Next, a procedure for manufacturing the wire harness 20 (see FIG. 9) using the mold 11 will be described with reference to FIGS. The lower mold sheet 21 made of a thermosetting resin is arranged in the wiring concave portion 14 of each molded portion 13. The lower mold sheet 21 is arranged so as to be bridged between the ribs 15 and 16 forming the wiring concave portion 14, and in this state, the mold 11 is vacuum-suctioned. Thereby, as shown in FIG. 3, the lower die sheet 21 comes into close contact with the routing concave portion 14. At this time, the mold 11 can be heated to cure the lower mold sheet 21.
[0023]
After the lower sheet 21 is in close contact, as shown in FIG. 4, a required number of electric wires 17 are placed and routed on the lower sheet 21 in the wiring recess 14. Then, the upper die sheet 22 is covered so as to cover the electric wires 17 and the ribs 15 and 16, and vacuum suction is performed.
[0024]
Since the air between the lower sheet 21 and the upper sheet 22 is sucked by this vacuum suction, as shown in FIG. Adhere to At the beginning of the vacuum suction, since the air between the sheets 21 and 22 is sucked, the suction force is weak, and the upper sheet 22 is in a state of simply covering the groove 18.
[0025]
Further, when the vacuum suction is continued and the air between the sheets 21 and 22 is suctioned and removed, the suction force is increased, and the peripheral portion of the upper die sheet 22 is sucked into the groove 18 as shown in FIG.
[0026]
Thereafter, by continuing the vacuum suction or increasing the suction force, the upper die sheet 22 is further sucked into the groove portion 18 and brought into contact with the cutter blade 19 in the groove portion 18 as shown in FIG. By the contact with the cutter blade 19, the peripheral portion of the upper die sheet 22 is cut.
[0027]
A heat-sensitive adhesive such as a pressure-sensitive adhesive or a hot melt is applied to one or both of the opposing surfaces of the lower mold sheet 21 and the upper mold sheet 22. In the case of a pressure-sensitive adhesive, the sheets 21 and 22 are bonded by the mutual contact of the sheets 21 and 22 by vacuum suction, and the sheets 21 and 22 are bonded. On the other hand, in the case of a heat-sensitive adhesive, the sheets 21 and 22 are adhered by heating the mold 11 and the ribs 15 and 16 to develop an adhesive force. The bonding is performed in parallel with the suction of the upper mold sheet 22. For this reason, in the state of FIG. 7 in which the upper die sheet 22 is cut, the upper die sheet 22 and the lower die sheet 21 are bonded, and the shape-maintaining wire harness 20 is formed.
[0028]
Thereafter, the vacuum suction is stopped, and the formed wire harness 20 is pulled up and taken out of the mold 11 as shown in FIG. In FIG. 8, reference numeral 23 denotes sheet waste separated by cutting. FIG. 9 shows a wire harness 20 formed and held in shape.
[0029]
In the manufacture of such a wire harness 20, the upper mold sheet 22 is cut by contacting the cutter blade 19 using a vacuum suction force for imparting the shape of the wire harness. The joining of the upper and lower sheets 22 and 22 and the cutting of the upper mold sheet 22 can be continuously performed by vacuum suction, and therefore, it is not necessary to lower the press plate for cutting the sheet, and the process is simplified. You. Therefore, workability is improved.
[0030]
【The invention's effect】
As described above, according to the manufacturing method of the first aspect of the present invention, the sheet is cut by bringing the sheet into contact with the cutter blade using the vacuum suction force for holding the shape. Sheet joining and sheet cutting can be performed continuously, and the number of steps is reduced. Further, it is unnecessary to lower the press plate for cutting the sheet. For this reason, workability can be improved.
[0031]
According to the mold of the second aspect of the present invention, the cutter blade provided outside the wiring recess cuts the sheet by a vacuum suction force for maintaining the shape, so that the joining of the sheet and the cutting of the sheet are continuously performed. Can be done Further, since a press plate for cutting is not required, the entire manufacturing apparatus can be simplified.
[0032]
According to the third aspect of the present invention, since the cutter blade is provided in the groove provided outside the routing concave portion, the cutter blade is not exposed, which is safe.
[0033]
According to the fourth aspect of the present invention, since the routing recess can be formed only by erection of the rib on the molding surface, the routing recess can be easily formed, and the change thereof can be easily performed.
[Brief description of the drawings]
FIG. 1 is a perspective view of a mold according to an embodiment of the present invention.
FIG. 2 is a sectional view of a mold.
FIG. 3 is a sectional view showing a lower mold sheet forming step.
FIG. 4 is a cross-sectional view showing an electric wire routing step.
FIG. 5 is a cross-sectional view showing a step of closely attaching an upper mold sheet and a lower mold sheet.
FIG. 6 is a cross-sectional view showing a step of sucking the upper die sheet into the groove.
FIG. 7 is a cross-sectional view illustrating a cutting step of the upper die sheet.
FIG. 8 is a cross-sectional view showing a step of taking out a wire harness.
FIG. 9 is a cross-sectional view of the manufactured wire harness.
FIG. 10 is a perspective view of a mold used for conventional manufacturing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Die 12 Molding surface 13 Molding part 14 Wiring concave part 15 Rib 16 Rib 17 Electric wire 18 Groove part 19 Cutter blade 20 Wire harness 21 Lower mold sheet 22 Upper mold sheet

Claims (4)

Disposed-installing recess of the mold in a state sandwiching the wire between the upper and lower sheets, by vacuum suction from the mold by joining the upper and lower sheet A method of manufacturing a wire harness,
A method for manufacturing a wire harness, comprising: providing a cutter blade for cutting a sheet outside the wiring recess, and cutting at least one sheet into contact with the cutter blade by the suction force of the vacuum suction. A forming recess for arranging a wire harness composed of a plurality of electric wires on a predetermined path is provided on a molding surface, and the electric wire is disposed in the arranging concave portion sandwiched between upper and lower sheets, and vacuum suction is performed. A mold that connects the upper and lower sheets by doing
A mold used for manufacturing a wire harness, wherein a cutter blade that is cut by contacting at least one sheet by the suction force of the vacuum suction is provided outside the wiring recess. 3. The mold according to claim 2, wherein a groove is formed outside the wiring recess, and the cutter blade is provided in the groove. 4. The mold according to claim 2, wherein the wiring recess is provided in a rib erected on the molding surface.

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