JP2007109495A - Manufacturing device and method of shield wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing device and a manufacturing method of a shield wire which is easy to process and capable of providing excellent shield performance. <P>SOLUTION: A plurality of wires 13 and a drain wire 14 with both ends held by holding parts 2 are moved along the longitudinal direction thereof; a pair of strip-like ALSs (aluminum laminate sheet) 17 are fed along the longitudinal direction of the wires 13 and 14 to sandwich the wires 13 and 14 between them by feed units 3 and 4; and both ends in the width direction of the pair of ALSs 17 which are superposed on each other by sandwiching the wires 13 and 14 are joined with each other by an ultrasonic joining machine 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus and a method for manufacturing a shielded electric wire having a shielding function against noise.

  In a car as a moving body, a wire harness is routed to supply electric power from a power source such as a battery to a mounted electronic device such as various lamps and various motors or to send a control signal from a control device. ing. The wire harness includes a plurality of electric wires and terminal fittings attached to the ends of the electric wires. A shielded electric wire may be used as the electric wire constituting the wire harness described above (see FIGS. 3 and 4, for example, see Patent Document 1).

  The shielded electric wire 101 illustrated in FIG. 3 includes a plurality of covered electric wires 102, one drain wire 103, a metal foil 104, and a sheath 105. Each of the covered electric wires 102 includes a conductive core wire 110 and a covering portion 111 that covers the core wire 110. The core wire 110 has a round cross section and includes copper or a copper alloy. The covering portion 111 is made of an insulating synthetic resin. The drain line 103 has a round cross section and is made of a conductive metal such as copper or a copper alloy. The metal foil 104 is made of a conductive metal such as copper, a copper alloy, or aluminum, and is formed in a foil shape. The metal foil 104 covers all the covered electric wires 102 and the drain wires 103 and is in contact with the drain wires 103. The sheath 105 is made of an insulating synthetic resin, and covers the outer periphery of the bundle of wires in which the covered electric wire 102 and the drain wire 103 are covered with the metal foil 104. The sheath 105 is formed on the outer periphery of these electric wire bundles by extrusion molding.

  Further, the shielded electric wire 201 illustrated in FIG. 4 includes a plurality of covered electric wires 102, one drain wire 103, and a conductive thin film sheet 106. The covered electric wire 102 and the drain wire 103 are the same as those shown in FIG. The conductor thin film sheet 106 includes a thin conductor layer 107 and an insulating layer 108 laminated on the conductor layer 107 and is formed in a thin sheet shape. The conductor layer 107 is made of a conductive metal such as copper, a copper alloy, or aluminum. The conductor thin film sheet 106 covers all the covered electric wires 102 and the drain wires 103 and is in contact with the drain wires 103. In addition, the conductor thin film sheet 106 is covered in a manner that the other end is overlapped with one end in the width direction and the surface of the insulating layer 108 at the one end and the surface of the conductor layer 107 at the other end are in contact with each other. 102 and the drain line 103 are covered.

In the shielded wires 101 and 201 described above, when noise from the outside tries to enter the core wire 110 of each covered wire 102, this noise is transmitted to the metal foil 104 or the conductor layer 107. The noise is released outside the shielded electric wires 101 and 201 through the drain wire 103. Thus, the metal foil 104 of the shielded electric wire 101 and the conductor layer 107 of the shielded electric wire 201 prevent external noise from entering the core wire 110 of each covered electric wire 102.
JP 2001-057114 A

  When the terminal treatment was performed on the shielded electric wire 101 described above, a sheath strip for stripping the required length of the metal foil 104 and the sheath 105 at both ends was performed, and terminal fittings were attached to both ends of the covered electric wire 102 and the drain wire 103. . However, these processes have many man-hours, are complicated, and are not suitable for automation because they easily damage the wire, resulting in an increase in processing time and processing cost. Furthermore, since the portion peeled off by the sheath strip is discarded, there is a problem that the material is wasted and is not desirable from the viewpoint of environmental protection.

  In addition, since the shielded electric wire 201 described above has the conductor thin film sheet 106 covered on the outer periphery after the terminal metal fittings are attached to the covered electric wire 102 and the drain wire 103, a sheath strip becomes unnecessary, and the man-hour is less than the shielded electric wire 101. I'll do it. However, the shielded electric wire 201 causes the conductive thin film sheet 106 to be vertically attached to the electric wires 102 and 103 while the electric wires 102 and 103 and the conductive thin film sheet 106 are pulled over the entire length in the longitudinal direction. Since the conductive layer 107 at the other end is brought into contact with the insulating layer 108 at one end in the width direction, a large manufacturing facility having the same length as the conductive thin film sheet 106 is required. Therefore, there is a limit to the length of the shielded electric wire 201. On the other hand, when the conductor thin film sheet 106 is gradually wound from the front end to the rear end in the longitudinal direction of the electric wires 102 and 103, wrinkles are offset. It is conceivable to divide the conductive thin film sheet 106 so as to prevent the wrinkles from coming close. However, in this case, there is a problem that man-hours increase, and a wasteful overlapping margin occurs at the joint of the conductive thin film sheet 106. Problems such as enlargement will arise.

  In addition, although not shown, a shielded electric wire in which a conductor thin film sheet is spirally wound around the outer periphery of a covered electric wire and a drain wire in a state in which terminal fittings are attached in advance has been devised. However, this shielded electric wire has a problem that the electric wire is enlarged and weighted due to a wasteful overlap margin generated when the conductive thin film sheet is spirally wound. Further, since this shielded wire is formed by winding the conductive thin film sheet in a spiral shape, there is a problem that a gap is easily formed at the seam, and noise is likely to leak from the gap, that is, the shielding performance is lowered.

  Therefore, an object of this invention is to provide the manufacturing apparatus and manufacturing method of a shielded electric wire which manufactures the shielded electric wire which is easy to process and can obtain favorable shielding performance.

  In order to solve the above problems and achieve the object, the invention described in claim 1 holds both ends of a plurality of electric wires, and a holding portion movable along the longitudinal direction of the electric wires, and both holding portions. And a strip-shaped conductor thin film sheet having a conductor layer and an insulating layer laminated on one side of the conductor layer, and being fed along the longitudinal direction of the wire in a state of being vertically attached to the wire A second supply unit that feeds another conductive thin film sheet in a state of being opposed to each other, and the conductive thin film sheet and the electric wire sandwiching each other, and the supply unit from the supply unit An apparatus for manufacturing a shielded electric wire, comprising: fixing means for fixing both ends in the width direction of the conductive thin film sheets arranged on the downstream side in the conveyance direction of the conductive thin film sheet and overlapped with each other. is there.

  According to a second aspect of the present invention, a plurality of electric wires are sandwiched between a pair of strip-like conductor thin film sheets each having a conductor layer and an insulating layer laminated on one side of the conductor layer, and the wires are arranged in the longitudinal direction. It is a manufacturing method of the shielded electric wire characterized by fixing both ends of the width direction of the pair of above-mentioned conductor thin film sheets piled up mutually while moving in the direction.

  According to the invention described in claim 1, since the shielded wire manufacturing apparatus can sandwich the wire in which the terminal metal fitting is previously attached to the pair of conductive thin film sheets, it is not necessary to apply the sheath strip, and the processing can be performed. It is possible to provide a shielded wire manufacturing apparatus that is easy and is environmentally friendly and does not waste material. Further, since both ends of the conductor thin film sheet are fixed while moving the electric wire sandwiched between the pair of conductor thin film sheets, it is only necessary to provide the fixing means at one place on the tip side in the moving direction of the electric wire. Can be simplified and downsized. Furthermore, since both ends of the conductive thin film sheet are fixed from the front end to the rear end while moving the electric wire sandwiched between the pair of conductive thin film sheets, the conductive thin film sheet is divided even for a long shielded electric wire. Therefore, it is possible to provide a shielded wire manufacturing apparatus with a reduced diameter and weight that has good shielding performance without generating a seam and has no unnecessary overlap margin. .

  According to the second aspect of the present invention, since the electric wire with the terminal fittings attached in advance can be sandwiched between the pair of conductor thin film sheets, it is not necessary to apply a sheath strip, the processing is easy and the material is wasted. It is possible to provide a method for manufacturing a shielded electric wire in consideration of the environment in which no occurrence occurs. In addition, since both ends of the conductor thin film sheet are fixed while moving the electric wire sandwiched between the pair of conductor thin film sheets, the fixing means for fixing the both ends is provided at one position on the tip side in the moving direction of the electric wire. The manufacturing apparatus can be simplified and reduced in size only by providing. Furthermore, since both ends of the conductive thin film sheet are fixed from the front end to the rear end while moving the electric wire sandwiched between the pair of conductive thin film sheets, the conductive thin film sheet is divided even for a long shielded electric wire. Therefore, it is possible to provide a method for manufacturing a shielded electric wire having a reduced diameter and a reduced weight, which has a good shield performance without generating a seam and has no unnecessary overlap margin. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an explanatory view showing a shielded wire manufacturing apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a shielded wire manufactured by the manufacturing apparatus shown in FIG.

  As shown in FIG. 2, the shielded electric wire 10 sandwiches a plurality of covered electric wires 13 and one drain wire 14 between a pair of aluminum laminated sheets (hereinafter referred to as ALS) 17 as a pair of conductive thin film sheets opposed to each other. It consists of

  The covered electric wire 13 is formed in a round cross section having a core wire 11 and a covering portion 12 covering the core wire 11. The core wire 11 is formed by twisting a plurality of conductive wires made of conductive metal such as copper or copper alloy, and has a round cross section. That is, the core wire 11 is a stranded wire. Moreover, the coating | coated part 12 consists of synthetic resin which has insulation, and coat | covers the core wire 11 keeping an insulation state.

  The drain line 14 has a round cross section and is made of a conductive metal such as copper or a copper alloy. Further, terminal fittings 18 for wiring (shown in FIG. 1) are attached to both ends of the drain wire 14 and the covered electric wire 13.

  The ALS 17 has a flexible and thin conductor layer 15 and a thin insulating layer 16 laminated on the conductor layer 15 and is formed in a relatively thin strip shape. The conductor layer 15 is made of a conductive metal containing aluminum or an aluminum alloy. The insulating layer 16 is made of a synthetic resin having insulation properties such as polyvinyl chloride (PVC), and is laminated on one surface of the conductor layer 15.

  Further, the shielded electric wire 10 is overlapped with a pair of ALSs 17 with the conductor layer 15 positioned on the inner side and the insulating layer 16 positioned on the outer side. The conductor layers 15 are metal-bonded to each other at both ends in the width direction of the pair of ALSs 17 by ultrasonic bonding. Further, in the shielded electric wire 10, the drain wire 14 and the conductor layer 15 described above are in contact with each other, and the drain wire 14 in contact with the conductor layer 15 is connected to a desired ground circuit or the like. Such a shielded electric wire 10 is used as an electric wire constituting a wire harness or the like, and noise that is about to enter the core wire 11 of the covered electric wire 13 is passed through the conductor layer 15 and the drain wire 14 in contact with the conductor layer 15. The ground circuit, that is, the shielded electric wire 10 is escaped.

  Next, the structure of the manufacturing apparatus of the shielded electric wire 10 described above will be described. The shielded electric wire 10 is manufactured by the manufacturing apparatus 1 shown in FIG. The manufacturing apparatus 1 is installed on a factory floor or the like, holds both ends of a plurality of electric wires 13 and 14, and a pair of holding portions 2 that are movable along the longitudinal direction of the electric wires 13 and 14, A supply unit 3 as a supply unit that is positioned between the holding units 2 and sends out one ALS 17 in a state of being vertically attached to the electric wires 13, 14, opposite the supply unit 3 and the electric wires 13, 14; A second supply unit 4 serving as a second supply unit for sending out the other ALS 17 in a state where the one ALS 17 and the electric wires 13 and 14 are overlapped with each other, and on the downstream side in the transport direction of the ALS 17 from the supply units 3 and 4 An ultrasonic bonding machine 5 is provided as a fixing means for fixing both ends in the width direction of the pair of ALSs 17 arranged and superposed on each other. In the present specification, the “electric wire” means a general term for the plurality of covered electric wires 13 and one drain wire 14.

  As shown in FIG. 1, the holding portion 2 includes a main body portion 2a and a chuck 2b that is connected to the main body portion 2a and holds the electric wires 13 and 14 one by one. The chuck 2b is provided according to the number of the electric wires 13 and 14. A slider and driving means (not shown) are attached to the main body 2a, and the holding part 2 is movable in a linear direction along a rail (not shown) provided on the ceiling side of the electric wires 13 and 14. And when this holding | maintenance part 2 moves, the electric wires 13 and 14 are conveyed along the longitudinal direction. In the illustrated example, the electric wires 13 and 14 to which the terminal fittings 18 are attached in advance are held by the holding portion 2, but the holding portion 2 holds the electric wires 13 and 14 to which the terminal fittings 18 are not attached. It is also possible.

  The supply unit 3 measures one ALS 17 wound in a roll shape for each product line length and feeds it in a direction crossing the longitudinal direction of the electric wires 13 and 14, and the measured ALS 17 is cut. And a conveying roller 33 that changes the direction of the ALS 17 fed from the ALS reel 31 so as to be parallel to the longitudinal direction of the electric wires 13 and 14 and sends the ALS 17 vertically attached to the electric wires 13 and 14. Has been. In the present specification, “the ALS 17 is vertically attached to the electric wires 13, 14” means that the ALS 17 is overlapped on the outer surfaces of the electric wires 13, 14 along the longitudinal direction of the electric wires 13, 14.

  The second supply unit 4 has the same configuration as the supply unit 3, and measures the other ALS 17 wound in a roll shape for each product line length in a direction crossing the longitudinal direction of the electric wires 13 and 14. The ALS reel 41 that is fed out, the cutter 42 that cuts the measured ALS 17, and the direction of the ALS 17 that is fed out from the ALS reel 41 are changed so as to be parallel to the longitudinal direction of the wires 13 and 14 and It is configured to be provided with a transport roller 43 and the like for sending out to the attached state, that is, sending out the other ALS 17 so as to overlap each other with the one ALS 17 and the wires 13 and 14 interposed therebetween.

  As shown in FIG. 1, the ultrasonic bonding machine 5 includes a chip (also referred to as a tool horn) 51, an anvil 52 opposed to the chip 51, an oscillator (not shown), a vibrator, a cone, a horn, and the like. It has. The ultrasonic bonding machine 5 positions the pair of ALSs 17 in which both ends are overlapped with each other between the tip 51 and the anvil 52 so that the overlapping margin of both ends contacts the tip 51 and the anvil 52, In a state where the tip 51 and the anvil 52 are pressurized in a direction to approach each other, the vibrator is vibrated by an oscillator, and this vibration is transmitted to the chip 51 via a cone and a horn. Then, the ultrasonic bonding machine 5 applies ultrasonic vibration to the pair of ALSs 17 sandwiched between the chip 51 and the anvil 52 to bond the overlapping margins at both ends.

  Next, a method for manufacturing the shielded electric wire 10 using the manufacturing apparatus 1 described above will be described. When manufacturing the shielded electric wire 10, first, the both ends of the covered electric wire 13 and the drain wire 14 having the terminal fittings 18 attached to both ends are sandwiched and held by the chucks 2 b of the pair of holding portions 2. Subsequently, the pair of ALSs 17 sent out from the supply units 3 and 4 are overlapped with each other so that the conductor layer 15 is positioned on the side of the wires 13 and 14 and sandwich the wires 13 and 14. Then, the pair of ALSs 17 are conveyed toward the ultrasonic bonding machine 5, and vibration is applied between the tip 51 and the anvil 52 with the overlapping margins of both ends of the pair of ALSs 17 between the conductor layers 15 in the overlapping margins. Are metal-bonded to each other. The shielded electric wire 10 is obtained by performing such a process from the front end to the rear end of the electric wires 13 and 14 in the conveying direction.

  According to the manufacturing apparatus 1 and the manufacturing method of the shielded electric wire 10 of the present embodiment, since the electric wires 13 and 14 to which the terminal fittings 18 are previously attached can be sandwiched between the pair of ALSs 17, it is not necessary to apply a sheath strip. It is possible to provide a manufacturing apparatus 1 and a manufacturing method for a shielded electric wire 10 that are easy to process and are environmentally friendly so as not to waste material. Further, since both ends of the ALS 17 are fixed while moving the electric wires 13 and 14 sandwiched between the pair of ALSs 17, the fixing means such as the ultrasonic bonding machine 5 is attached to the front end side in the moving direction of the electric wires 13 and 14. The manufacturing apparatus 1 can be simplified and reduced in size only by being provided at one place. Further, since both ends of the ALS 17 are fixed from the front end to the rear end while the electric wires 13 and 14 sandwiched between the pair of ALS 17 are moved, the ALS 17 is not divided even if the long shielded electric wire 10 is used. It can be integrated with the electric wires 13 and 14, and for this reason, the manufacturing apparatus 1 and the manufacturing method of the reduced-diameter / light-weight shielded electric wire 10 which has a good shield performance without generating a joint and has no wasteful overlap allowance. Can be provided.

  In the above-described embodiment, both end portions in the width direction of the ALS 17 are joined (fixed) using the ultrasonic bonding machine 5, but the present invention is not limited to this, and both end portions of the pair of ALS 17 are joined together. You may make it stick with an adhesive agent or the adhesive agent which has electroconductivity. The “conductive adhesive” is obtained by blending conductive particles such as gold, silver, nickel, and carbon in a synthetic resin such as epoxy, urethane, and acrylic.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

It is explanatory drawing which shows the manufacturing apparatus of the shielded electric wire concerning one embodiment of this invention. It is a perspective view which shows the shielded electric wire manufactured by the manufacturing apparatus shown by FIG. It is a perspective view which shows the conventional shielded electric wire. It is a perspective view which shows the other conventional shielded electric wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus 2 Holding part 3 Supply unit (supply part)
4 Second supply unit (supply unit)
5 Ultrasonic bonding machine (fixing means)
10 Shielded wire 13 Covered wire (wire)
14 Drain wire (electric wire)
15 Conductor Layer 16 Insulating Layer 17 ALS (Conductor Thin Film Sheet)

Claims (2)

Holding both ends of the plurality of electric wires, and a holding part movable along the longitudinal direction of the electric wires;
Along the longitudinal direction of the electric wire, a belt-like conductive thin film sheet positioned between both holding portions and having a conductive layer and an insulating layer laminated on one side of the conductive layer is vertically attached to the electric wire. Supply section
A second supply unit that feeds another conductive thin film sheet in a state of being opposed to the supply unit and the electric wire, and overlapping the conductive thin film sheet and the electric wire;
The shield comprising: a fixing means for fixing both ends in the width direction of the conductive thin film sheets disposed on the downstream side in the conveying direction of the conductive thin film sheet from the supply unit and overlapped with each other. Electric wire manufacturing equipment.   The plurality of electric wires are sandwiched between a pair of strip-like conductor thin film sheets having a conductor layer and an insulating layer laminated on one side of the conductor layer, and the wires are overlapped with each other while moving in the longitudinal direction. A method for manufacturing a shielded electric wire, comprising fixing both ends of a pair of conductor thin film sheets in the width direction.

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