WO2020031650A1 - 配線部材の固定構造 - Google Patents

配線部材の固定構造 Download PDF

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Publication number
WO2020031650A1
WO2020031650A1 PCT/JP2019/028284 JP2019028284W WO2020031650A1 WO 2020031650 A1 WO2020031650 A1 WO 2020031650A1 JP 2019028284 W JP2019028284 W JP 2019028284W WO 2020031650 A1 WO2020031650 A1 WO 2020031650A1
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WO
WIPO (PCT)
Prior art keywords
melt adhesive
hot melt
linear transmission
adherend
hot
Prior art date
Application number
PCT/JP2019/028284
Other languages
English (en)
French (fr)
Inventor
大地 福嶋
平井　宏樹
東小薗　誠
芳正 水野
心優 荒巻
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Priority to US17/265,340 priority Critical patent/US11850839B2/en
Priority to CN201980051748.5A priority patent/CN112534666B/zh
Priority to JP2020536418A priority patent/JP7042423B2/ja
Publication of WO2020031650A1 publication Critical patent/WO2020031650A1/ja

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H01B7/0846—Parallel wires, fixed upon a support layer

Definitions

  • the present disclosure relates to a fixing structure of a wiring member.
  • Patent Document 1 discloses a technique for bonding an electric wire to an adherend via hot melt adhesives provided on both surfaces of a base.
  • Patent Document 1 since the base is a resin sheet, it is necessary to externally heat the hot-melt adhesive by hot pressing or the like to melt the hot-melt adhesive. When it is necessary to heat, the amount of heating of the electric wire may be increased.
  • the fixing structure of the wiring member according to the present disclosure includes a planar base having conductivity, a first hot-melt adhesive provided on one main surface of the base, and a second base provided on the other main surface of the base.
  • An adhesive member including: a hot melt adhesive; a linear transmission member that is bonded to the first hot melt adhesive on one main surface side of the base with respect to the adhesive member; and the adhesive member. And an adherend adhered to the second hot melt adhesive on the other main surface side of the base.
  • the hot-melt adhesive is heated in a state where the linear transmission member is in contact with the hot-melt adhesive, the amount of heating for bonding can be suppressed.
  • FIG. 1 is a perspective view illustrating a fixing structure of a wiring member according to the embodiment.
  • FIG. 2 is an explanatory view showing a state of manufacturing the wiring member fixing structure according to the embodiment.
  • the fixing structure of the wiring member of the present disclosure is as follows.
  • a linear transmission member that is bonded to the first hot melt adhesive on one main surface side of the base with respect to the bonding member, and the other of the base with respect to the bonding member An adherend adhered to the second hot melt adhesive on the main surface side, and a wiring member fixing structure.
  • the substrate can be selectively heated by high-frequency induction heating. At this time, the first and second hot melt adhesives are heated by heat transmitted from the base. For this reason, even when the hot melt adhesive is heated in a state where the linear transmission member is in contact with the hot melt adhesive, the amount of heating for bonding can be suppressed.
  • the linear transmission member may be an electric wire including a metal linear core wire and an insulating coating covering the core wire.
  • a linear core wire is less likely to be heated by high-frequency induction heating than a planar substrate. Therefore, even when the linear transmission member is an electric wire, it is possible to suppress an increase in the amount of heating of the insulating coating due to heat conduction from the core wire.
  • the first hot melt adhesive may be easier to adhere to the linear transmission member than the second hot melt adhesive. Thereby, the fixing strength between the adhesive member and the linear transmission member can be increased.
  • the first hot melt adhesive and the coating of the linear transmission member may be formed using the same type of resin as a material. This facilitates setting of a compatible combination between the first hot melt adhesive and the coating of the linear transmission member.
  • the second hot melt adhesive may be easier to adhere to the adherend than the first hot melt adhesive. Thereby, the fixing strength between the adhesive member and the adherend can be increased.
  • the second hot melt adhesive and the adherend may be formed of the same resin. This facilitates setting of a compatible combination between the second hot-melt adhesive and the adherend.
  • the plurality of linear transmission members are bonded to the first hot-melt adhesive, and when the high-frequency induction heating is performed, the bonding between the second hot-melt adhesive and the adherend is performed.
  • the state may be formed so as to be more easily resolved than the state of adhesion between the first hot melt adhesive and the linear transmission member. This makes it easy to collectively remove the plurality of linear transmission members together with the base from the adherend when the vehicle is scrapped or repaired.
  • FIG. 1 is a perspective view showing a wiring member fixing structure 1 according to the embodiment.
  • FIG. 2 is an explanatory diagram illustrating a state of manufacturing the wiring member fixing structure 1 according to the embodiment.
  • the wiring member fixing structure 1 includes an adhesive member 10, a linear transmission member 20, and an adherend 30.
  • the linear transmission member 20 and the adherend 30 are bonded and fixed by the bonding member 10.
  • the bonding member 10 includes the base 12, the first hot melt adhesive 16, and the second hot melt adhesive 18.
  • the base 12 becomes a heating element by induction heating.
  • the material of the base 12 is not particularly limited as long as it has conductivity and can generate heat by induction heating.
  • a conductive resin is also used. be able to.
  • the base 12 is a material having high heat generation efficiency by induction heating, such as a material having conductivity and a high magnetic permeability.
  • the material of the base 12 is preferably iron, nichrome, aluminum, copper, or the like.
  • the base 12 is formed in a planar shape.
  • a conductor foil or the like can be used as the base 12.
  • the width, length, and thickness of the base 12 can be set as appropriate.
  • the width dimension of the base 12 may be a width dimension on which the linear transmission members 20 can be placed, and may be set according to the number of the linear transmission members 20, the interval between the linear transmission members 20, and the like.
  • the length of the base 12 may be a size corresponding to the length of the linear transmission member 20.
  • the end of the linear transmission member 20 may be set so as to extend outside the base 12, or may be set so as to be located on the base 12.
  • the thickness of the base 12 may be set according to the layout of the adhesive member 10, the amount of heat generation, the frequency of the alternating current, and the like. For example, if the base 12 is thin, the adhesive member 10 may be broken when it is handled. On the other hand, when the base 12 is thick, there is a possibility that the amount of heat generated may decrease due to a decrease in resistance or a difficulty in flowing a current inside the base 12 due to the skin effect. If the base 12 is thick, the adhesive member 10 may be hard. In view of these, for example, the thickness dimension of the base 12 is considered to be between 1 micrometer and 3 millimeters.
  • the first hot melt adhesive 16 is provided on one main surface 13 of the base 12.
  • the first hot melt adhesive 16 may be provided only on a part of the one main surface 13 of the base 12, but is preferably provided on the entire surface of the one main surface 13 of the base 12. Since the first hot melt adhesive 16 is provided on the entire surface of the one main surface 13 of the base 12, direct heat radiation from the one main surface 13 of the base 12 to the outside air is suppressed, and the first hot melt adhesive The agent 16 can be more efficiently heated.
  • the second hot melt adhesive 18 is provided on the other main surface 14 of the base 12.
  • the second hot melt adhesive 18 may be provided only on a part of the other main surface 14 of the base 12, but is preferably provided on the entire surface of the other main surface 14 of the base 12. Since the second hot-melt adhesive 18 is provided on the entire surface of the other main surface 14 of the base 12, direct heat radiation from the other main surface 14 of the base 12 to the outside air is suppressed, and the second hot-melt bonding is performed.
  • the agent 18 can be more efficiently heated.
  • the thickness of the first and second hot melt adhesives 16 and 18 is not particularly limited, and depends on the adhesive force between the linear transmission member 20 and the adherend 30 to be bonded, the work efficiency, and the like. It should just be set appropriately. For example, if the hot melt adhesive is thin, there is a possibility that a sufficient adhesive force cannot be obtained between the base 12 and the bonding partner. Further, for example, when the hot melt adhesive is thick, it takes time for the hot melt adhesive to be heated and softened, which may take a long time to manufacture. In view of these, for example, it is considered that the thickness of the first and second hot melt adhesives 16 and 18 is 50 micrometers to 200 micrometers. The thicknesses of the first and second hot melt adhesives 16 and 18 may be the same, the first hot melt adhesive 16 may be thicker, and the second hot melt adhesive 16 may be thicker. 18 may be thicker.
  • the materials of the first and second hot melt adhesives 16 and 18 are not particularly limited as long as they can be used as hot melt adhesives.
  • a polyolefin hot melt adhesive, a polyester hot melt adhesive, a polyamide hot melt adhesive, a synthetic rubber hot melt adhesive, or the like may be used. it can.
  • Such an adhesive member 10 is formed, for example, by forming the first and second hot melt adhesives 16 and 18 into a sheet shape and fusing the same to the sheet-shaped substrate 12 by laminating or the like. can do. Further, for example, the adhesive member 10 can also be formed by applying a solvent containing a material to be the first and second hot melt adhesives 16 and 18 to the sheet-like base 12 and drying it.
  • the bonding member 10 may be used by being cut out to a predetermined size from a large-sized base material.
  • the linear transmission member 20 is bonded to the first hot melt adhesive 16 on the one main surface 13 side of the base 12 with respect to the bonding member 10.
  • One or more linear transmission members 20 (three in the example shown in FIG. 1) are bonded to the first hot melt adhesive 16.
  • the linear transmission member 20 is a member that is connected to a component mounted on a vehicle and transmits electricity and / or light to and / or from the component.
  • the linear transmission member 20 may be a linear member that transmits electricity or light.
  • the linear transmission member 20 may be a general electric wire having a core wire and a coating around the core wire, or may be a bare conductor, a shielded wire, an enameled wire, a nichrome wire, an optical fiber, or the like.
  • the linear transmission member 20 for transmitting electricity may be various signal lines or various power lines.
  • the linear transmission member 20 that transmits electricity may be used as an antenna, a coil, or the like that sends or receives a signal or power to or from a space.
  • the linear transmission member 20 is an electric wire 22 including a metal linear core wire 24 and an insulating coating 26 covering the core wire 24.
  • the core wire 24 includes one or a plurality of strands.
  • the strand is formed of a conductive material such as copper, copper alloy, aluminum, and aluminum alloy.
  • the core wire 24 is composed of a plurality of strands, the plurality of strands are preferably twisted.
  • the diameter of the core wire 24 is appropriately set according to the use of the electric wire 22 and the like. At this time, the diameter of the core wire 24 may be the same as the thickness of the base 12, may be smaller than the thickness of the base 12, or may be larger.
  • the insulating coating 26 is formed by extruding a resin material around the core wire 24.
  • the resin material constituting the insulating coating 26 is not particularly limited as long as it is used as a coating material for a vehicle electric wire, and for example, PVC (polyvinyl chloride) or PE (polyethylene) can be used. .
  • the linear transmission member 20 is arranged in a straight line, but the path of the linear transmission member 20 may be set as appropriate, and may be on the adhesive member 10 or on the adherend 30. It may be arranged in a bent shape. Further, in the example shown in FIG. 1, the plurality of linear transmission members 20 are disposed so as to extend in parallel, but the paths of the plurality of linear transmission members 20 may be appropriately set, and the adhesive member They may be arranged on different paths so as to branch or intersect on 10 or on the adherend 30. Further, in the example shown in FIG. 1, a plurality of the same linear transmission members 20 are provided on one adhesive member 10, but the diameter, application, structure, and the like of the plurality of linear transmission members 20 are appropriately set. The linear transmission members 20 having different diameters, applications, structures, or the like may be bonded to the same bonding member 10.
  • the adherend 30 adheres to the second hot melt adhesive 18 on the other main surface 14 side of the base 12 with respect to the adhesive member 10.
  • the part of the adherend 30 to which the adhesive member 10 adheres is described as being made of resin.
  • the adherend 30 include various resin parts mounted on an automobile, such as trims, molded ceilings, instrument panels, interior members (design members) such as floor carpets, soundproof members such as silencers, and various parts of a resin body. Can be employed.
  • the surface of the adherend 30 to which the bonding member 10 is bonded is preferably equal to or larger than the bonding member 10.
  • the bonding member 10 is preferably formed to be the same as or smaller than the surface of the adherend 30 to be bonded.
  • the portion of the adherend 30 to which the adhesive member 10 adheres has a flat surface shape, but this is not an essential configuration.
  • the shape of a portion of the adherend 30 to which the bonding member 10 is bonded may be a shape having steps or irregularities, a bent shape, or the like.
  • the width direction of the bonding member 10 (the width direction of the linear transmission member 20; a plurality of linear transmission members 20 are arranged).
  • Direction may be adhered so as to bend along the adherend 30, or a portion of the adhesive member 10 extending in the longitudinal direction (the longitudinal direction of the linear transmission member 20) may be attached to the adherend 30. It may be adhered so as to bend along.
  • the resin material constituting the portion of the adherend 30 to which the adhesive member 10 adheres is not particularly limited, and examples thereof include polyolefin, polyester, polyamide, polyurethane, polyvinyl chloride, various elastomers, and fiber-reinforced plastic. It can be appropriately selected from resin materials used for vehicles and the like.
  • the portion of the adherend 30 to which the adhesive member 10 adheres may be a fibrous material such as a knitted fabric, a woven fabric, a nonwoven fabric, or a non-fibrous material.
  • the non-fibrous material may be a foamed material, or a solid material having a uniform cross section instead of the foamed material.
  • the insulating coating 26 of the linear transmission member 20 and the portion of the adherend 30 to which the bonding member 10 is bonded are formed of different resin materials.
  • different hot melt adhesives are employed here as the first and second hot melt adhesives 16 and 18. Then, the first hot melt adhesive 16 is more easily bonded to the linear transmission member 20 than the second hot melt adhesive 18. Further, the second hot melt adhesive 18 is easier to adhere to the adherend 30 than the first hot melt adhesive 16.
  • one of the two hot-melt adhesives is more likely to adhere to the bonding partner than the other means that the two hot-melt adhesives have the same thickness dimension, and have a heating temperature suitable for each. It means a case where one of the adhesive strengths is higher than the other when heat-bonded.
  • the first hot-melt adhesive 16 and the insulating coating 26 of the linear transmission member 20 are formed of the same type of resin, the first hot-melt adhesive 16 becomes the second hot-melt adhesive. It is easier to adhere to the linear transmission member 20 than the melt adhesive 18.
  • the second hot melt adhesive 18 and the adherend 30 are formed using the same type of resin as the material, so that the second hot melt adhesive 18 becomes the first hot melt adhesive. 16 is easier to adhere to the adherend 30.
  • hot melt adhesives have compatibility with some materials. Therefore, even when the hot melt adhesive and its bonding partner are of different systems, due to this compatibility, the first hot melt adhesive 16 adheres to the linear transmission member 20 more than the second hot melt adhesive 18. It is also conceivable that the second hot melt adhesive 18 becomes easier to adhere to the adherend 30 than the first hot melt adhesive 16.
  • the bonding state between the second hot melt adhesive 18 and the adherend 30 is changed to the first hot melt adhesive. 16 is formed so as to be more easily released than the bonded state between the linear transmission member 20 and the linear transmission member 20.
  • This configuration is achieved, for example, by setting the softening point of the first hot melt adhesive 16 higher than the softening point of the second hot melt adhesive 18.
  • the first hot melt adhesive is heated by heating the adhesive member to a temperature lower than the softening point of the first hot melt adhesive 16 and higher than the softening point of the second hot melt adhesive 18.
  • the bonding state between the second hot melt adhesive 18 and the adherend 30 is more easily released than the bonding state between the adhesive 16 and the linear transmission member 20.
  • the adhesive strength between the first hot melt adhesive 16 and the linear transmission member 20 is higher than the adhesive strength between the second hot melt adhesive 18 and the adherend 30. It is done by things. In this case, it is not essential that the softening point of the first hot-melt adhesive 16 is higher than the softening point of the second hot-melt adhesive 18, but it is preferable that the softening point is the same or higher. Regarding the adhesive strength, the thickness of the first and second hot melt adhesives 16 and 18 may be changed, or the first and second hot melt adhesives 16 may be changed in consideration of compatibility with the linear transmission member 20 and the adherend 30. , 18 can be appropriately set.
  • the heating of the bonding member 10 can be performed by the induction heating device 80.
  • An example of such an induction heating device 80 will be described first.
  • the induction heating device 80 includes a coil 82, a main body 84 that houses the coil 82, and an AC current generating mechanism 86 that allows an AC current to flow through the coil 82.
  • the main body portion 84 is provided with a proximity surface 85 for approaching the counterpart member.
  • the proximity surface 85 is a surface through which many lines of magnetic force pass.
  • the AC current generating mechanism 86 is not particularly limited, and may be configured according to the power supply.
  • the AC current generating mechanism 86 includes a transformer that reduces the voltage of the commercial power supply, a rectifier that rectifies AC to DC, a high-frequency generator that generates high frequency from DC, and the like. It can be composed. The frequency of the alternating current is appropriately set depending on the type of metal constituting the base 20.
  • the transformer and the rectifier can be omitted.
  • the proximity surface 85 of the induction heating device 80 is brought close to the bonding member 10, and an alternating current is supplied to the coil 82.
  • the proximity surface 85 of the induction heating device 80 is closer to the base 12 from the one main surface 13 side (the side of the linear transmission member 20). It may be approached from the side (the adherend 30 side) or may be approached from both sides.
  • the induction heating is performed in a state where both the linear transmission member 20 and the adherend 30 are in contact with the adhesive member 10.
  • the proximity surface 85 is pressed against the linear transmission member 20, but the pressing need not be performed. The same applies to the case where the proximity surface 85 of the induction heating device 80 is brought closer to the base 12 from the other main surface 14 side (the adherend 30 side).
  • the induction heating is ended by turning off the power supply or separating the induction heating device 80, and the first and second hot melt adhesives 16 and 18 are cooled by natural cooling, forced cooling, or the like, whereby the first heating is performed. Then, the second hot melt adhesives 16 and 18 adhere to the linear transmission member 20 and the adherend 30.
  • the linear transmission member 20 is the electric wire 22, and the core wire 24 is made of a conductor.
  • the linear core wire 24 has a smaller area through which the lines of magnetic force pass than the base 12, eddy current is less likely to occur than the base 12, and the heat generation efficiency is poor. For this reason, even when induction heating is attempted by the induction heating device 80 in a state where the adhesive member 10 and the linear transmission member 20 are in contact with each other, heat generation of the core wire 24 can be suppressed, thereby suppressing melting of the insulating coating 26. be able to.
  • the principle that the eddy current loss of the linear transmission member 20 is smaller than that of the planar base member 12 is that when an iron core is provided in a coil in a transformer, the iron core is formed by a laminated iron plate. This is considered to be similar to the principle of reducing the eddy current.
  • eddy current loss is actively generated in the base 12 by using the planar base 12 having an area larger than that of the linear transmission member 20, and the core is formed by a laminated iron plate.
  • the effect of the present invention is to use the effect opposite to the effect that can reduce the eddy current generated in the above.
  • the bonding state between the second hot melt adhesive 18 and the adherend 30 is changed to the first state.
  • the hot melt adhesive 16 and the linear transmission member 20 are more easily formed than the adhesive state.
  • the base 12 can be selectively heated by high-frequency induction heating.
  • the first and second hot melt adhesives 16 and 18 are heated by the heat transmitted from the base 12. For this reason, even when the first hot melt adhesive 16 is heated in a state where the linear transmission member 20 is in contact with the first hot melt adhesive 16, the amount of heating for bonding can be suppressed.
  • the linear core wire 24 is less likely to be heated by high-frequency induction heating than the planar substrate 12. For this reason, even when the linear transmission member 20 is the electric wire 22, it is possible to suppress an increase in the amount of heating of the insulating coating 26 due to heat conduction from the core wire 24. Therefore, since the linear transmission member 20 is heated mainly by heat conduction from the first hot melt adhesive 16, the linear transmission member 20 can be suppressed from being heated by the first hot melt adhesive 16. Becomes
  • the first hot melt adhesive 16 is more easily bonded to the linear transmission member 20 than the second hot melt adhesive 18, the fixing strength between the adhesive member 10 and the linear transmission member 20 can be increased. .
  • the first hot melt adhesive 16 and the insulating coating 26 of the linear transmission member 20 are formed of the same type of resin as a material, it is easy to set a compatible combination between these members. .
  • the bonding state between the second hot melt adhesive 18 and the adherend 30 is higher than the bonding state between the first hot melt adhesive 16 and the linear transmission member 20. Since it is easily formed, it is easy to collectively remove the plurality of linear transmission members 20 together with the base 12 from the adherend 30 when the vehicle is scrapped or repaired.
  • the portion of the adherend 30 to which the bonding member 10 is bonded has been described as being made of resin, but this is not an essential configuration. It is also conceivable that the portion of the adherend 30 to which the bonding member 10 is bonded is made of metal.
  • various metal members mounted on the vehicle such as various parts of a metal body, various reinforcements for instrument panels, scuff plates, and slide rails for seats, can be adopted.
  • the metal material constituting the portion of the adherend 30 to which the bonding member 10 is bonded is not particularly limited.
  • metal materials used for vehicles such as iron, aluminum, copper, and various alloys, may be appropriately used. Can be selected.
  • the adherend 30 to which the bonding member 10 is adhered is made of metal and has a large area (an area viewed from the normal direction of the base 12), the adherend 30 is subjected to high-frequency induction heating. 30 can also directly generate heat, so that the bonding state between the second hot-melt adhesive 18 and the adherend 30 is more easily released than the bonding state between the first hot-melt adhesive 16 and the linear transmission member 20. .
  • a portion of the adherend 30 to which the bonding member 10 is bonded is formed to be more easily heated by the induction heating than the base 12.
  • the amount of heat transmitted from the adherend 30 to the second hot melt adhesive increases, and the state of adhesion between the second hot melt adhesive 18 and the adherend 30 changes with the first hot melt adhesive 16 and the wire. It is easier to dissolve than the state of adhesion with the shape transmission member 20.
  • a material constituting the portion of the adherend 30 to which the adhesive member 10 is adhered Is a material having a high magnetic permeability such as iron, and a material forming the base 12 is a material having a lower magnetic permeability than iron such as copper and aluminum.
  • a portion of the adherend 30 to which the bonding member 10 is bonded is formed of a conductive material having a larger area than the base 12. In this case, the amount of heating of the adherend 30 can be increased by performing induction heating using the induction heating device 80 having the proximity surface 85 having a larger area than the base 12.
  • the bonding state between the second hot-melt adhesive 18 and the adherend 30 is set to the first state.
  • the hot-melt adhesive 16 and the linear transmission member 20 need not be formed so as to be more easily released than the bonded state.
  • the adherend 30 has been described as a member originally attached to a portion of the vehicle where the linear transmission member 20 is provided, this is not an essential configuration. It is also conceivable that the adherend 30 is a member other than the member originally attached to the portion where the linear transmission member 20 is provided in the vehicle. That is, the adherend 30 may be a member newly adopted for assembling and protecting the linear transmission member 20 in the vehicle.
  • the adherend 30 may be a sheet material. Such a sheet material is used, for example, as a member for keeping the plurality of linear transmission members 20 flat, as a member for regulating the path of the linear transmission members 20, or for connecting the linear transmission members 20 to the vehicle. It may be used as a member to which a fixing component for fixing the fixing member is attached. Further, for example, it is conceivable that the adherend 30 is a protection component of the linear transmission member 20 such as a protector.
  • linear transmission member 20 and the adherend 30 have been described as being simultaneously bonded to the bonding member 10 in one bonding step, this is not an essential configuration.
  • the linear transmission member 20 and the adherend 30 may be bonded to the bonding member 10 at different times in different bonding steps. In this case, it is preferable that the softening point of the one of the first hot melt adhesive 16 and the second hot melt adhesive 18 that is first bonded and fixed to the counterpart member is low. .
  • the bonding member 10 and the adherend 30 are fixed after the linear transmission member 20 and the bonding member 10 are fixed first.
  • an intermediate product after the linear transmission member 20 and the adhesive member 10 are fixed and before the adherend 30 is fixed can be regarded as a wiring member with an adhesive member. Then, in a state where the wiring body with the adhesive member is placed along the adherend 30, induction heating is performed to form the wiring member fixing structure 1.
  • the adhesive member 10 and the linear transmission member 20 are fixed.
  • the intermediate product after the adherend 30 and the adhesive member 10 are fixed and before the linear transmission member 20 is fixed can be regarded as the adherend with the adhesive member. Then, in a state where the linear transmission member 20 is placed along the adherend with the adhesive member, induction heating is performed to form the wiring member fixing structure 1.
  • the induction heating is performed in a state where both the linear transmission member 20 and the adherend 30 are in contact with the adhesive member 10, this is not an essential configuration.
  • the bonding member 10 is induction-heated, and the first hot-melt adhesive 16, the second hot-melt adhesive 18 or the same is used.
  • the linear transmission member 20 and / or the adherend 30 may be brought into contact with the bonding member 10 to be bonded.
  • first hot-melt adhesive 16 has been described as being easier to adhere to the linear transmission member 20 than the second hot-melt adhesive 18, this is not an essential configuration.
  • the second hot-melt adhesive 18 may be more easily adhered to the linear transmission member 20 than the first hot-melt adhesive 16, or both may be equally easily adhered to the linear transmission member 20.
  • the second hot melt adhesive 18 has been described as being easier to adhere to the adherend 30 than the first hot melt adhesive 16, but this is not an essential configuration.
  • the first hot melt adhesive 16 may be easier to adhere to the adherend 30 than the second hot melt adhesive 18, or both may be equally likely to adhere to the adherend 30.
  • first hot-melt adhesive 16 and the second hot-melt adhesive 18 have been described as being different types of hot-melt adhesives, this is not an essential configuration.
  • the first hot melt adhesive 16 and the second hot melt adhesive 18 may be the same type of hot melt adhesive.
  • the portion of the linear transmission member 20 and the adherend 30 to which the first hot melt adhesive 16 and the second hot melt adhesive 18 are bonded may be formed of the same material. In this case, the first hot melt adhesive 16 and the second hot melt adhesive 18 may be of the same type or different types.

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Abstract

線状伝送部材がホットメルト接着剤に接した状態でホットメルト接着剤を加熱する場合でも、接着のための加熱量を抑えることができる技術を提供することを目的とする。配線部材の固定構造は、接着部材と、線状伝送部材と、被着体と、を備える。接着部材は、導電性を有する面状の基体と、前記基体の一方主面に設けられた第１のホットメルト接着剤と、前記基体の他方主面に設けられた第２のホットメルト接着剤と、を含む。基体は、誘電加熱装置による誘電加熱によって発熱可能である。線状伝送部材は、前記接着部材に対して前記基体の一方主面側で前記第１のホットメルト接着剤と接着している。被着体は、前記接着部材に対して前記基体の他方主面側で前記第２のホットメルト接着剤と接着している。

Description

配線部材の固定構造
　本開示は、配線部材の固定構造に関する。
　特許文献１は、基体の両面に設けられたホットメルト接着剤を介して電線を被着体に接着させる技術を開示している。
特開２００２－１１２４４０号公報
　しかしながら、特許文献１では、基体が樹脂シートであるため、熱プレスなどによって外部から加熱してホットメルト接着剤を溶かす必要が有り、電線がホットメルト接着剤に接した状態でホットメルト接着剤を加熱する必要が有る場合、電線の加熱量も多くなる恐れがあった。
　そこで、線状伝送部材がホットメルト接着剤に接した状態でホットメルト接着剤が加熱される場合でも、接着のための加熱量を抑えることができる技術を提供することを目的とする。
　本開示の配線部材の固定構造は、導電性を有する面状の基体と、前記基体の一方主面に設けられた第１のホットメルト接着剤と、前記基体の他方主面に設けられた第２のホットメルト接着剤と、を含む接着部材と、前記接着部材に対して前記基体の一方主面側で前記第１のホットメルト接着剤と接着している線状伝送部材と、前記接着部材に対して前記基体の他方主面側で前記第２のホットメルト接着剤と接着している被着体と、を備える配線部材の固定構造である。
　本開示によれば、線状伝送部材がホットメルト接着剤に接した状態でホットメルト接着剤が加熱される場合でも、接着のための加熱量を抑えることができる。
図１は実施形態に係る配線部材の固定構造を示す斜視図である。 図２は実施形態に係る配線部材の固定構造を製造する様子を示す説明図である。
　［本開示の実施形態の説明］
　最初に本開示の実施態様を列記して説明する。
　本開示の配線部材の固定構造は、次の通りである。
　（１）導電性を有する面状の基体と、前記基体の一方主面に設けられた第１のホットメルト接着剤と、前記基体の他方主面に設けられた第２のホットメルト接着剤と、を含む接着部材と、前記接着部材に対して前記基体の一方主面側で前記第１のホットメルト接着剤と接着している線状伝送部材と、前記接着部材に対して前記基体の他方主面側で前記第２のホットメルト接着剤と接着している被着体と、を備える配線部材の固定構造である。高周波誘導加熱によって基体を選択的に加熱することができる。このとき、第１、第２のホットメルト接着剤が基体から伝わる熱によって加熱される。このため、線状伝送部材がホットメルト接着剤に接した状態でホットメルト接着剤が加熱される場合でも、接着のための加熱量を抑制することができる。
　（２）前記線状伝送部材が金属製の線状の芯線と前記芯線を覆う絶縁被覆とを含む電線であってもよい。線状の芯線は、面状の基体よりも高周波誘導加熱によって加熱されにくい。このため、線状伝送部材が電線である場合でも、芯線からの熱伝導によって絶縁被覆の加熱量が多くなることを抑制できる。
　（３）前記第１のホットメルト接着剤は、前記第２のホットメルト接着剤よりも前記線状伝送部材に接着しやすくてもよい。これにより、接着部材と線状伝送部材との固定強度を高めることができる。
　（４）前記第１のホットメルト接着剤と前記線状伝送部材の被覆とが同系統の樹脂を材料として形成されていてもよい。これにより、第１のホットメルト接着剤と線状伝送部材の被覆との間で相性の良い組合せの設定が簡易となる。
　（５）前記第２のホットメルト接着剤は、前記第１のホットメルト接着剤よりも前記被着体に接着しやすくてもよい。これにより、接着部材と被着体との固定強度を高めることができる。
　（６）前記第２のホットメルト接着剤と前記被着体とが同系統の樹脂を材料として形成されていてもよい。これにより、第２のホットメルト接着剤と被着体との間で相性の良い組合せの設定が簡易となる。
　（７）前記第１のホットメルト接着剤に前記線状伝送部材が複数接着されており、高周波誘導加熱が行われたときに、前記第２のホットメルト接着剤と前記被着体との接着状態が、前記第１のホットメルト接着剤と前記線状伝送部材との接着状態よりも解消されやすく形成されていてもよい。これにより、車両の廃車時や修理時などに、被着体から複数の線状伝送部材を基体ごと一括して取り外すことが容易となる。
　［本開示の実施形態の詳細］
　本開示の配線部材の固定構造の具体例を、以下に図面を参照しつつ説明する。なお、本発明はこれらの例示に限定されるものではなく、請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。
　｛実施形態｝
　以下、実施形態に係る配線部材の固定構造について説明する。図１は、実施形態に係る配線部材の固定構造１を示す斜視図である。図２は、実施形態に係る配線部材の固定構造１を製造する様子を示す説明図である。
　配線部材の固定構造１は、接着部材１０と、線状伝送部材２０と、被着体３０と、を備える。配線部材の固定構造１において、接着部材１０によって線状伝送部材２０と被着体３０とが接着固定されている。
　接着部材１０は、基体１２と、第１のホットメルト接着剤１６と、第２のホットメルト接着剤１８と、を含む。
　基体１２は、誘導加熱によって発熱体となる。基体１２の材料は導電性を有し、誘導加熱によって発熱可能なものであれば、特に限定されるものではなく、鉄、ニクロム、アルミニウム、銅などの金属の他、導電性樹脂なども採用することができる。好ましくは、基体１２は、導電性を有する材料であって透磁率の大きい材料など誘導加熱による発熱効率の良い材料であるとよい。特に線状伝送部材２０に金属材料が用いられる場合、それと同じかそれよりも発熱効率の良い材料であることが好ましい。例えば、線状伝送部材２０にアルミニウム、銅などが用いられる場合、基体１２の材料は、鉄、ニクロム、アルミニウム、銅などであることが好ましい。
　基体１２は、面状に形成されている。例えば、基体１２として導体箔などを用いることができる。基体１２の幅寸法、長さ寸法、厚み寸法は、適宜設定可能である。例えば、基体１２の幅寸法は、線状伝送部材２０を載せられる幅寸法であればよく、線状伝送部材２０の本数、線状伝送部材２０間の間隔等に応じて設定されるとよい。また例えば、基体１２の長さ寸法は、線状伝送部材２０の長さ寸法に応じた寸法であればよい。このとき、線状伝送部材２０の端部が基体１２の外方に延出するように設定されていてもよいし、基体１２上に位置するように設定されていてもよい。また例えば、基体１２の厚み寸法は、接着部材１０の取り回し、発熱量、交流電流の周波数等に応じて設定されるとよい。例えば基体１２が薄いと、接着部材１０の取り回し時に破れたりする恐れがある。一方、基体１２が厚いと、抵抗が小さくなったり、表皮効果の影響によって基体１２の内部に電流が流れにくくなったりすることによって発熱量が小さくなる恐れがある。また基体１２が厚いと、接着部材１０が硬くなってしまう恐れがある。これらに鑑みて、例えば基体１２の厚み寸法は、１マイクロメートル乃至３ミリメートルの間であることが考えられる。
　第１のホットメルト接着剤１６は、基体１２の一方主面１３に設けられている。第１のホットメルト接着剤１６は、基体１２の一方主面１３の一部にのみ設けられていてもよいが、基体１２の一方主面１３の全面に設けられていることが好ましい。第１のホットメルト接着剤１６が基体１２の一方主面１３の全面に設けられていることにより、基体１２の一方主面１３から外気への直接の放熱が抑えられ、第１のホットメルト接着剤１６のより効率的な加熱が可能となる。
　第２のホットメルト接着剤１８は、基体１２の他方主面１４に設けられている。第２のホットメルト接着剤１８は、基体１２の他方主面１４の一部にのみ設けられていてもよいが、基体１２の他方主面１４の全面に設けられていることが好ましい。第２のホットメルト接着剤１８が基体１２の他方主面１４の全面に設けられていることにより、基体１２の他方主面１４から外気への直接の放熱が抑えられ、第２のホットメルト接着剤１８のより効率的な加熱が可能となる。
　第１、第２のホットメルト接着剤１６、１８の厚みは特に限定されるものではなく、接着相手となる線状伝送部材２０、被着体３０との間の接着力および作業効率等に応じて適宜設定されていればよい。例えば、ホットメルト接着剤が薄いと、基体１２と接着相手との間で十分な接着力が得られなかったりする恐れがある。また例えば、ホットメルト接着剤が厚いと、ホットメルト接着剤が加熱されて軟化するまでに時間がかかり、製造に時間がかかる恐れがある。これらに鑑みて、例えば、第１、第２のホットメルト接着剤１６、１８の厚みは、５０マイクロメートル乃至２００マイクロメートルであることが考えられる。なお、第１、第２のホットメルト接着剤１６、１８の厚みは同じであってもよいし、第１のホットメルト接着剤１６の方が厚くてもよいし、第２のホットメルト接着剤１８の方が厚くてもよい。
　第１、第２のホットメルト接着剤１６、１８の材料は、ホットメルト接着剤として使用できるものであれば、特に限定されるものではない。例えば第１、第２のホットメルト接着剤１６、１８としては、ポリオレフィン系ホットメルト接着剤、ポリエステル系ホットメルト接着剤、ポリアミド系ホットメルト接着剤、合成ゴム系ホットメルト接着剤などを用いることができる。
　係る接着部材１０は、例えば、第１、第２のホットメルト接着剤１６、１８がシート状に成形され、同じくシート状に成形された基体１２と、ラミネート加工などによって融着されることによって形成することができる。また例えば、接着部材１０は、シート状の基体１２に、第１、第２のホットメルト接着剤１６、１８となる材料を含む溶剤を塗布、乾燥させて形成することもできる。
　また係る接着部材１０は、大寸に形成された母材から所定の大きさに切り出されて使用されてもよい。
　線状伝送部材２０は、接着部材１０に対して基体１２の一方主面１３側で第１のホットメルト接着剤１６と接着している。第１のホットメルト接着剤１６に線状伝送部材２０が１本又は複数本（図１に示す例では３本）接着されている。
　線状伝送部材２０は、車両に搭載された部品につながれて、当該部品に及び／又は当該部品から電気及び／又は光を伝送する部材である。線状伝送部材２０は、電気又は光等を伝送する線状の部材であればよい。例えば、線状伝送部材２０は、芯線と芯線の周囲の被覆とを有する一般電線であってもよいし、裸導線、シールド線、エナメル線、ニクロム線、光ファイバ等であってもよい。
　電気を伝送する線状伝送部材２０としては、各種信号線、各種電力線であってもよい。電気を伝送する線状伝送部材２０は、信号又は電力を空間に対して送る又は空間から受けるアンテナ、コイル等として用いられてもよい。
　ここでは線状伝送部材２０は、金属製の線状の芯線２４と、芯線２４を覆う絶縁被覆２６とを含む電線２２であるものとして説明する。
　芯線２４は、１本又は複数本の素線を含む。素線は、例えば銅、銅合金、アルミニウム、アルミニウム合金等の導電材料によって形成される。芯線２４が複数本の素線で構成される場合、複数本の素線は撚られていることが好ましい。芯線２４の径は、電線２２の用途等に応じて適宜設定される。このとき芯線２４の径は、基体１２の厚みと同じであってもよいし、基体１２の厚みより小さくてもよいし、大きくてもよい。
　絶縁被覆２６は、樹脂材料が芯線２４の周囲に押出成形されるなどして形成される。絶縁被覆２６を構成する樹脂材料は、車両用電線の被覆材料として使用されるものであれば特に限定されるものではなく、例えばＰＶＣ（ポリ塩化ビニル）又はＰＥ（ポリエチレン）などを用いることができる。
　なお図１に示す例では、線状伝送部材２０が直線状に配設されているが、線状伝送部材２０の経路は適宜設定されていればよく、接着部材１０上又は被着体３０上で曲がって配設されていてもよい。また図１に示す例では、複数本の線状伝送部材２０が並行に延びるように配設されているが、複数本の線状伝送部材２０の経路は適宜設定されていればよく、接着部材１０上又は被着体３０上で分岐したり、交差したりするように異なる経路で配設されていてもよい。また図１に示す例では、一の接着部材１０に同じ線状伝送部材２０が複数本配設されているが、複数本の線状伝送部材２０の径、用途、構造等は適宜設定されていればよく、径、用途、又は構造等の異なる線状伝送部材２０が同じ接着部材１０に接着されていてもよい。
　被着体３０は、接着部材１０に対して基体１２の他方主面１４側で第２のホットメルト接着剤１８と接着している。
　被着体３０のうち接着部材１０が接着する部分は、樹脂製であるものとして説明する。係る被着体３０として、トリム、成形天井、インストルメントパネル、フロアカーペットなどの内装部材（意匠部材）、サイレンサなどの防音部材、又は樹脂ボディの各部分等、自動車に搭載される各種樹脂部を有する部材を採用できる。
　被着体３０のうち接着部材１０が接着する面は、接着部材１０と同じかそれよりも大きいとよい。接着部材１０は、被着体３０のうち接着対象となる面と同じかそれよりも小さく形成されるとよい。
　図１に示す例では、被着体３０のうち接着部材１０が接着する部分の形状は、平坦面形状であるが、このことは必須の構成ではない。例えば、被着体３０のうち接着部材１０が接着する部分の形状は、段差又は凹凸のある形状、或いは曲がっている形状などであってもよい。被着体３０のうち接着部材１０が接着する部分の形状が曲がっている形状である場合、接着部材１０のうち幅方向（線状伝送部材２０の幅方向、複数の線状伝送部材２０が並ぶ方向）に延びる部分が被着体３０に沿って曲がるように接着されていてもよいし、接着部材１０のうち長手方向（線状伝送部材２０の長手方向）に延びる部分が被着体３０に沿って曲がるように接着されていてもよい。
　被着体３０のうち接着部材１０が接着する部分を構成する樹脂材料は、特に限定されるものではなく、例えば、ポリオレフィン、ポリエステル、ポリアミド、ポリウレタン、ポリ塩化ビニル、各種エラストマー、繊維強化プラスチックなど、車両に使用される樹脂材料などから適宜選択可能である。
　また被着体３０のうち接着部材１０が接着する部分は、編地、織地、不織布などの繊維材であってもよいし、非繊維材であってもよい。非繊維材として、発泡成形材であってもよいし、発泡成形材ではなく断面が一様充実な充実材であってもよい。
　ここでは線状伝送部材２０の絶縁被覆２６と、被着体３０のうち接着部材１０が接着する部分とが異なる樹脂材料で形成されている。このとき、ここでは第１、第２のホットメルト接着剤１６、１８として異なるホットメルト接着剤が採用されている。そして、第１のホットメルト接着剤１６は、第２のホットメルト接着剤１８よりも線状伝送部材２０に接着しやすい。また第２のホットメルト接着剤１８は、第１のホットメルト接着剤１６よりも被着体３０に接着しやすい。
　ここで２つのホットメルト接着剤のうち一方が他方よりも接着相手に接着しやすいとは、２つのホットメルト接着剤が、同程度の厚み寸法で、かつそれぞれに適した加熱温度で接着相手と加熱接着された際に、一方の接着強度が他方の接着強度よりも高い場合のことを言うものとする。
　ここでは第１のホットメルト接着剤１６と線状伝送部材２０の絶縁被覆２６とが同系統の樹脂を材料として形成されていることによって、第１のホットメルト接着剤１６は、第２のホットメルト接着剤１８よりも線状伝送部材２０に接着しやすくなっている。同様にここでは第２のホットメルト接着剤１８と被着体３０とが同系統の樹脂を材料として形成されていることによって、第２のホットメルト接着剤１８は、第１のホットメルト接着剤１６よりも被着体３０に接着しやすくなっている。
　このほか、通常、ホットメルト接着剤には、材料によって相性があることが知られている。従って、ホットメルト接着剤とその接着相手とが異系統である場合でも、この相性によって、第１のホットメルト接着剤１６が、第２のホットメルト接着剤１８よりも線状伝送部材２０に接着しやすくなっていたり、第２のホットメルト接着剤１８が、第１のホットメルト接着剤１６よりも被着体３０に接着しやすくなっていたりすることも考えられる。
　また配線部材の固定構造１が形成された状態で、高周波誘導加熱が行われたときに、第２のホットメルト接着剤１８と被着体３０との接着状態が、第１のホットメルト接着剤１６と線状伝送部材２０との接着状態よりも解消されやすく形成されている。
　当該構成は、例えば、第１のホットメルト接着剤１６の軟化点が第２のホットメルト接着剤１８の軟化点よりも高いことによってなされる。この場合、第１のホットメルト接着剤１６の軟化点よりも低く、第２のホットメルト接着剤１８の軟化点よりも高い温度となるように接着部材を加熱することによって、第１のホットメルト接着剤１６と線状伝送部材２０との接着状態よりも第２のホットメルト接着剤１８と被着体３０との接着状態が解消されやすくなる。
　また例えば当該構成は、平常状態で、第１のホットメルト接着剤１６と線状伝送部材２０との接着強度が、第２のホットメルト接着剤１８と被着体３０との接着強度よりも高いことによってなされる。この場合、第１のホットメルト接着剤１６の軟化点が、第２のホットメルト接着剤１８の軟化点よりも高いことは必須ではないが、同程度かそれよりも高いことが好ましい。接着強度に関し、第１、第２のホットメルト接着剤１６、１８の厚みを変えたり、線状伝送部材２０、被着体３０との相性に鑑みて第１、第２のホットメルト接着剤１６、１８の種類を変えたりすることによって適宜設定可能である。
　＜製造方法＞
　接着部材１０の加熱は、誘導加熱装置８０によって行うことができる。係る誘導加熱装置８０の一例について先に説明する。
　誘導加熱装置８０は、コイル８２と、コイル８２を収容する本体部８４と、コイル８２に交流電流を流すための交流電流の発生機構８６とを備える。本体部８４には、相手側部材に近づける近接面８５が設けられている。誘導加熱装置８０において、コイル８２に交流電流が流れると、コイル８２の周りに磁力線が生じる。近接面８５はこの磁力線が多く通過する面である。交流電流の発生機構８６は、特に限定されるものではなく、電源に応じて構成されていればよい。例えば、誘導加熱装置８０が商用電源を利用する場合、交流電流の発生機構８６は、商用電源の電圧を下げる変圧器、交流から直流に整流する整流器、直流から高周波を発生させる高周波発生器などで構成されることが考えられる。交流の周波数は、基体２０を構成する金属の種類によって適宜設定される。誘導加熱装置８０がバッテリの電源を利用する場合は、変圧器、整流器は省略可能である。
　接着部材１０の加熱するに当たって、誘導加熱装置８０の近接面８５を接着部材１０に近づけると共に、コイル８２に交流電流を流す。図２に示す例では、誘導加熱装置８０の近接面８５を、基体１２に対して一方主面１３側（線状伝送部材２０側）から近づけているが、基体１２に対して他方主面１４側（被着体３０側）から近づけてもよいし、両側から近づけてもよい。また図２に示す例では、線状伝送部材２０及び被着体３０の両方が接着部材１０に接した状態で誘導加熱を行っている。このとき図２に示す例では、近接面８５を線状伝送部材２０に押し当てているが、押し当てなくてもよい。誘導加熱装置８０の近接面８５を、基体１２に対して他方主面１４側（被着体３０側）から近づける場合も同様である。
　コイル８２に交流電流が流れて、コイル８２の周りに生じた磁力線は、接着部材１０の基体１２を通過する。このとき基体１２に渦電流が流れることによって、基体１２に渦電流損に応じたジュール熱が生じる。これによって基体１２が発熱し、これにより基体１２に接する第１、第２のホットメルト接着剤１６、１８が加熱され、軟化する。そして軟化した第１、第２のホットメルト接着剤１６、１８層がそれぞれ線状伝送部材２０、被着体３０にくっつく。その後、電源を落としたり、誘導加熱装置８０を離したりして誘導加熱を終えると共に、第１、第２のホットメルト接着剤１６、１８を自然冷却、強制冷却などによって冷却することによって、第１、第２のホットメルト接着剤１６、１８が線状伝送部材２０、被着体３０に接着した状態となる。
　ここで渦電流損による発熱に関し、材料の透磁率が高くなると、磁束を強めることができ、発熱効率が良くなる。また、材料の電気抵抗が大きくなると、ジュール熱が大きくなり、発熱効率が良くなる。このため、鉄は、銅、アルミニウムと比べて発熱効率が良くなる。銅、アルミニウムについては、交流の周波数を高くすることによって、表皮効果に基づく浸透深さが浅くなり、十分な発熱量を得ることが可能となる。
　なお基体１２が透磁率の高い材料で形成されている場合、ヒステリシス損による発熱も大きくなる。このため、銅、アルミニウムに比べて透磁率が高い材料である鉄で基体１２が形成されていると、発熱効率の向上を図ることができる。
　ここでは線状伝送部材２０が電線２２であり、その芯線２４は導体を材料としている。しかしながら、線状の芯線２４は、基体１２よりも磁力線の通過する面積が小さいため、基体１２よりも渦電流が生じにくく発熱効率が悪い。このため、接着部材１０と線状伝送部材２０とが接した状態で誘導加熱装置８０によって誘導加熱を試みた場合でも、芯線２４の発熱を抑制でき、これによって絶縁被覆２６が融けることを抑制することができる。特に、絶縁被覆２６のうち芯線２４に対して接着部材１０とは反対側の外面に近接面８５を押し当てた場合でも、当該外面が融けて絶縁被覆２６の厚みが薄くなるといった事態が生じにくい。
　なお面状の基体１２に比べて線状伝送部材２０の渦電流損が小さくなることの原理は、変圧器においてコイル内に鉄心が設けられる際、鉄心が積層鉄板にされることによって鉄心に生じる渦電流が小さくなる原理と同様のものであると考えられる。この際、ここでは線状伝送部材２０に比べて面積の大きい面状の基体１２を用いることによって、積極的に基体１２に渦電流損を生じさせており、鉄心を積層鉄板にすることによって鉄心に生じる渦電流を小さくできる作用効果と逆の作用効果を利用するものである。
　＜動作＞
　次に、配線部材の固定構造１が形成された状態で、高周波誘導加熱を行った場合について考える。例えば、車両の廃車時又は修理時など、被着体３０から複数の線状伝送部材２０を取り外す必要が有る際に、高周波誘導加熱を用いて取り外す場合などが想定される。
　上述したようにここでは配線部材の固定構造１が形成された状態で、高周波誘導加熱が行われたときに、第２のホットメルト接着剤１８と被着体３０との接着状態が、第１のホットメルト接着剤１６と線状伝送部材２０との接着状態よりも解消されやすく形成されている。これにより、配線部材の固定構造１が形成された状態で、高周波誘導加熱が行われたときに、接着部材１０の基体１２と被着体３０との間で剥がすことができ、被着体３０から複数の線状伝送部材２０を基体１２ごと一括して取り外すことができる。
　このことは、被着体３０に対する接着部材１０の位置の手直しが必要な場合、又は製品が不良品だったときに被着体３０から複数の線状伝送部材２０を取り外す場合などにも応用できる。
　上記のように構成された配線部材の固定構造１によると、高周波誘導加熱によって基体１２を選択的に加熱することができる。このとき、第１、第２のホットメルト接着剤１６、１８が基体１２から伝わる熱によって加熱される。このため、線状伝送部材２０が第１のホットメルト接着剤１６に接した状態で第１のホットメルト接着剤１６が加熱される場合でも、接着のための加熱量を抑制することができる。
　また線状の芯線２４は、面状の基体１２よりも高周波誘導加熱によって加熱されにくい。このため、線状伝送部材２０が電線２２である場合でも、芯線２４からの熱伝導によって絶縁被覆２６の加熱量が多くなることを抑制できる。従って、線状伝送部材２０は、主として第１のホットメルト接着剤１６からの熱伝導によって加熱されるため、線状伝送部材２０が第１のホットメルト接着剤１６より加熱されることが抑制可能となる。
　また第１のホットメルト接着剤１６は、第２のホットメルト接着剤１８よりも線状伝送部材２０に接着しやすいため、接着部材１０と線状伝送部材２０との固定強度を高めることができる。このとき第１のホットメルト接着剤１６と線状伝送部材２０の絶縁被覆２６とが同系統の樹脂を材料として形成されているため、これらの部材間で相性の良い組合せの設定が簡易となる。
　また第２のホットメルト接着剤１８は、第１のホットメルト接着剤１６よりも被着体３０に接着しやすいため、接着部材１０と被着体３０との固定強度を高めることができる。このとき第２のホットメルト接着剤１８と被着体３０とが同系統の樹脂を材料として形成されているため、これらの部材間で相性の良い組合せの設定が簡易となる。
　また高周波誘導加熱が行われたときに、第２のホットメルト接着剤１８と被着体３０との接着状態が、第１のホットメルト接着剤１６と線状伝送部材２０との接着状態よりも解消されやすく形成されているため、車両の廃車時や修理時などに、被着体３０から複数の線状伝送部材２０を基体１２ごと一括して取り外すことが容易となる。
　｛変形例｝
　実施形態において、被着体３０のうち接着部材１０が接着する部分が、樹脂製であるものとして説明してきたが、このことは必須の構成ではない。被着体３０のうち接着部材１０が接着する部分が、金属製であることも考えられる。係る被着体３０として、金属製ボディの各部分、インパネ用などの各種リインフォースメント、スカッフプレート、座席用のスライドレールなどの自動車に搭載される各種金属部材を採用できる。
　被着体３０のうち接着部材１０が接着する部分を構成する金属材料は、特に限定されるものではなく、例えば、鉄、アルミニウム、銅、各種合金など、車両に使用される金属材料などから適宜選択可能である。
　被着体３０のうち接着部材１０が接着する部分が金属製であり、その面積（基体１２の法線方向から見た面積）が大きい場合、高周波誘導加熱が行われたときに、被着体３０も直接発熱しうるため、第２のホットメルト接着剤１８と被着体３０との接着状態が、第１のホットメルト接着剤１６と線状伝送部材２０との接着状態よりも解消されやすい。線状伝送部材２０が電線２２である場合でも、被着体３０のうち接着部材１０が接着する部分の面積が電線２２よりも大きい場合、被着体３０の直接加熱される量が、電線２２の芯線２４が加熱される量も大きくなるため、第２のホットメルト接着剤１８と被着体３０との接着状態が、第１のホットメルト接着剤１６と線状伝送部材２０との接着状態よりも解消されやすい。
　この場合、被着体３０のうち接着部材１０が接着する部分が誘導加熱によって基体１２よりも加熱されやすく形成されていることが好ましい。これにより、被着体３０から第２ホットメルト接着剤に伝わる熱量が大きくなり、第２のホットメルト接着剤１８と被着体３０との接着状態が、第１のホットメルト接着剤１６と線状伝送部材２０との接着状態よりもより解消されやすくなる。被着体３０のうち接着部材１０が接着する部分が誘導加熱によって基体１２よりも加熱されやすく形成されている例として、例えば、被着体３０のうち接着部材１０が接着する部分を構成する材料が鉄などの透磁率の高い材料であり、基体１２を構成する材料が銅、アルミニウムなどの鉄よりも透磁率の低い材料であることが考えられる。また例えば、被着体３０のうち接着部材１０が接着する部分が導電性を有する材料によって基体１２よりも面積が大きく形成されていることが考えられる。この場合、基体１２よりも面積の大きい近接面８５を有する誘導加熱装置８０を用いて誘導加熱することによって、被着体３０の加熱量を多くすることができる。
　もっとも上記実施形態又は上記変形例において、配線部材の固定構造１は、高周波誘導加熱が行われたときに、第２のホットメルト接着剤１８と被着体３０との接着状態が、第１のホットメルト接着剤１６と線状伝送部材２０との接着状態よりも解消されやすく形成されていなくてもよい。
　またこれまで被着体３０は、車両において線状伝送部材２０が配設される部分にもともと組付けられる部材であるものとして説明してきたが、このことは必須の構成ではない。被着体３０は、車両において線状伝送部材２０が配設される部分にもともと組付けられる部材以外の部材であることも考えられる。つまり被着体３０は、車両において線状伝送部材２０の組み付け、保護などのために新たに採用された部材であることも考えられる。係る被着体３０として、例えば、シート材であることが考えられる。係るシート材は、例えば複数の線状伝送部材２０を偏平に保つための部材として用いられたり、線状伝送部材２０の経路規制を行うための部材として用いられたり、線状伝送部材２０を車両に固定するための固定部品が取付けられる部材として用いられたりすることが考えられる。また例えば、係る被着体３０として、プロテクタなどの線状伝送部材２０の保護部品であることも考えられる。
　またこれまで、接着部材１０に対して線状伝送部材２０と被着体３０とが一の接着工程において同時に接着されるものとして説明してきたが、このことは必須の構成ではない。接着部材１０に対して線状伝送部材２０と被着体３０とが別々の接着工程において時間をずらして接着されてもよい。この場合、第１のホットメルト接着剤１６と、第２のホットメルト接着剤１８とのうち先に相手部材と接着固定される方のホットメルト接着剤の軟化点が低くされていることが好ましい。
　例えば線状伝送部材２０と接着部材１０とが先に固定された後に、接着部材１０と被着体３０とが固定されることが考えられる。この場合、線状伝送部材２０と接着部材１０とが固定された後であって、被着体３０が固定される前の中間製造物について、接着部材付配線体とみなすことができる。そしてこの接着部材付配線体を被着体３０に沿わせた状態で、誘導加熱を行って配線部材の固定構造１と成すことができる。
　また例えば被着体３０と接着部材１０とが先に固定された後に、接着部材１０と線状伝送部材２０とが固定されることも考えられる。この場合、被着体３０と接着部材１０とが固定された後であって、線状伝送部材２０が固定される前の中間製造物について、接着部材付被着体とみなすことができる。そしてこの接着部材付被着体に線状伝送部材２０を沿わせた状態で、誘導加熱を行って配線部材の固定構造１と成すことができる。
　またこれまで線状伝送部材２０及び被着体３０の両方が接着部材１０に接した状態で誘導加熱が行われているものとして説明したが、このことは必須の構成ではない。線状伝送部材２０、被着体３０又はその両方が接着部材１０から離れた状態で、接着部材１０を誘導加熱し、第１のホットメルト接着剤１６、第２のホットメルト接着剤１８又はその両方が軟化した状態で、線状伝送部材２０、被着体３０又はその両方を接着部材１０に接触させて接着させるものであってもよい。
　またこれまで第１のホットメルト接着剤１６は、第２のホットメルト接着剤１８よりも線状伝送部材２０に接着しやすいものとして説明してきたが、このことは必須の構成ではない。第２のホットメルト接着剤１８が、第１のホットメルト接着剤１６よりも線状伝送部材２０に接着しやすい場合、または両者が同等に線状伝送部材２０に接着しやすい場合もあり得る。同様に第２のホットメルト接着剤１８は、第１のホットメルト接着剤１６よりも被着体３０に接着しやすいものとして説明してきたが、このことは必須の構成ではない。第１のホットメルト接着剤１６が、第２のホットメルト接着剤１８よりも被着体３０に接着しやすい場合、または両者が同等に被着体３０に接着しやすい場合もあり得る。
　またこれまで第１のホットメルト接着剤１６、第２のホットメルト接着剤１８が異なる種類のホットメルト接着剤であるものとして説明してきたが、このことは必須の構成ではない。第１のホットメルト接着剤１６、第２のホットメルト接着剤１８が同じ種類のホットメルト接着剤であることもあり得る。
　またこれまで線状伝送部材２０、被着体３０のうち第１のホットメルト接着剤１６、第２のホットメルト接着剤１８が接着される部分が異なる材料で形成されているものとして説明してきたが、このことは必須の構成ではない。線状伝送部材２０、被着体３０のうち第１のホットメルト接着剤１６、第２のホットメルト接着剤１８が接着される部分が同じ材料で形成されている場合もあり得る。この場合、第１のホットメルト接着剤１６、第２のホットメルト接着剤１８が同じ種類である場合もあり得るし、異なる種類である場合もあり得る。
　なお、上記実施形態及び各変形例で説明した各構成は、相互に矛盾しない限り適宜組み合わせることができる。
　１　配線部材の固定構造
　１０　接着部材
　１２　基体
　１３　一方主面
　１４　他方主面
　１６　第１のホットメルト接着剤
　１８　第２のホットメルト接着剤
　２０　線状伝送部材
　２２　電線
　２４　芯線
　２６　絶縁被覆
　３０　被着体

Claims (7)

  1. 　導電性を有する面状の基体と、前記基体の一方主面に設けられた第１のホットメルト接着剤と、前記基体の他方主面に設けられた第２のホットメルト接着剤と、を含む接着部材と、
    　前記接着部材に対して前記基体の一方主面側で前記第１のホットメルト接着剤と接着している線状伝送部材と、
    　前記接着部材に対して前記基体の他方主面側で前記第２のホットメルト接着剤と接着している被着体と、
    　を備える、配線部材の固定構造。
  2. 　請求項１に記載の配線部材の固定構造であって、
    　前記線状伝送部材が金属製の線状の芯線と前記芯線を覆う絶縁被覆とを含む電線である、配線部材の固定構造。
  3. 　請求項１又は請求項２に記載の配線部材の固定構造であって、
    　前記第１のホットメルト接着剤は、前記第２のホットメルト接着剤よりも前記線状伝送部材に接着しやすい、配線部材の固定構造。
  4. 　請求項３に記載の配線部材の固定構造であって、
    　前記第１のホットメルト接着剤と前記線状伝送部材の被覆とが同系統の樹脂を材料として形成されている、配線部材の固定構造。
  5. 　請求項１から請求項４のいずれか１項に記載の配線部材の固定構造であって、
    　前記第２のホットメルト接着剤は、前記第１のホットメルト接着剤よりも前記被着体に接着しやすい、配線部材の固定構造。
  6. 　請求項５に記載の配線部材の固定構造であって、
    　前記第２のホットメルト接着剤と前記被着体とが同系統の樹脂を材料として形成されている、配線部材の固定構造。
  7. 　請求項１から請求項６のいずれか１項に記載の配線部材の固定構造であって、
    　前記第１のホットメルト接着剤に前記線状伝送部材が複数接着されており、
    　高周波誘導加熱が行われたときに、前記第２のホットメルト接着剤と前記被着体との接着状態が、前記第１のホットメルト接着剤と前記線状伝送部材との接着状態よりも解消されやすく形成されている、配線部材の固定構造。
PCT/JP2019/028284 2018-08-08 2019-07-18 配線部材の固定構造 WO2020031650A1 (ja)

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