JP5966975B2 - Hot press mold and wire harness manufacturing method - Google Patents

Description

  The present invention relates to a technique for protecting a wire harness body while maintaining a predetermined path shape.

  Conventionally, as in Patent Document 1, a technique has been proposed in which an electric wire bundle is hot-pressed in a state of being covered with a nonwoven fabric to form an electric wire protection member to protect and control the path. In the electric wire protection member disclosed in Patent Document 1, along the path of the electric wire bundle, a path regulation part and a bending allowable part that is easier to bend than the path regulation part are formed.

JP 2011-160611 A

  However, in the technique disclosed in Patent Document 1, if an attempt is made to provide a sufficient protection function for the wire protection member, the outer peripheral surface thereof becomes hard. If the outer peripheral surface of the electric wire protection member becomes hard, the electric wire protection member interferes with peripheral components, and sound is likely to be generated. In order to suppress this, it is necessary to take measures such as winding a tape (also referred to as a soft tape) in which an adhesive layer is formed on one main surface of a flexible belt-like substrate around a wire protective member. However, since the belt-like substrate is attached to the wire protection member via the adhesive layer, the belt-like substrate may be displaced from the wire protection member when the wire harness is assembled to the vehicle. is there.

  Therefore, an object of the present invention is to suppress the displacement of the contact sound countermeasure portion with respect to the route restriction portion formed by the non-woven member.

The hot-press mold according to the first aspect is formed with a groove-shaped first mold surface surrounded by a bottom portion and a pair of side portions, and from the distal end side edge portion of one of the side portions to the proximal end side A lid that can close the side opening in a state where a gap is provided between the first mold in which the side opening is formed to be recessed toward the bottom and the bottom of the side opening, And a second mold formed with a second mold surface that closes an opening facing the bottom of the first mold surface.

A second aspect is a hot pressing mold according to the first aspect, wherein a bottom surface of the first mold surface has an arc shape, and a bottom portion of the side opening is formed of the first mold surface. Located on the side edge of the bottom.

A 3rd aspect is a shaping | molding die for hot press which concerns on a 1st or 2nd aspect, Comprising: The edge part which opposes the bottom part of the said side opening part among the said cover parts is gradually toward the front end side. It is formed into a thin shape.

A 4th aspect is a manufacturing method of the wire harness using the shaping | molding die for hot presses which concerns on any one 1st- 3rd aspect, Comprising: (a) At least one part of a wire harness main body is a non-woven member A step of winding the first region portion of the wire harness body, (b) a step of disposing the first region portion wound around at least a part of the wire harness body in the first mold surface, Extending a second region portion integrally formed at the winding end of the first region portion of the woven member through the side opening, and (d) the side opening. And (e) closing the opening facing the bottom of the first mold surface with a second mold surface; and (f) the first mold surface and the second mold. Heating the surface.

According to the first aspect, the first region portion of the nonwoven member is hot between the first mold surface and the second mold surface in a state where the first region portion of the nonwoven member is wound around the wire harness body. Can be pressed. At this time, the second region portion integrally formed with the first region portion is extended outward through the gap between the bottom portion of the side opening and the lid portion, so that the second region portion is It can be kept in a state where it is not hot pressed. Moreover, since the side opening is closed by the lid, the first region can be hot-pressed as much as possible.

According to the second aspect, the thickness of the bottom of the side opening can be reduced, and the second region portion extending outward through the gap between the bottom of the side opening and the lid is heated as much as possible. You can avoid it.

According to the 3rd aspect, the contact area of a cover part and a 2nd area | region part can be made as small as possible, and it can avoid heating a 2nd area | region part as much as possible.

According to the 4th aspect, a 1st area | region part can be wound around a non-woven member with respect to a wire harness main body, and this part can be mainly hot-pressed easily. At this time, it is possible to prevent hot pressing as much as possible by pulling out the second region portion integrally formed at the winding end portion of the first region portion of the non-woven member.

It is a schematic perspective view which shows the wire harness which concerns on embodiment. It is a schematic sectional drawing in the II-II line of FIG. It is a schematic sectional drawing which shows the wire harness which concerns on a modification. It is explanatory drawing which shows the manufacturing process of a wire harness. It is explanatory drawing which shows the manufacturing process of a wire harness. It is explanatory drawing which shows the shaping | molding die for hot presses. FIG. 3 is a schematic cross-sectional view of a hot pressing mold during hot pressing. It is explanatory drawing which shows the manufacturing process of a wire harness.

  Hereinafter, the wire harness which concerns on embodiment is demonstrated. FIG. 1 is a schematic perspective view showing a wire harness 10 according to the embodiment, and FIG. 2 is a schematic cross-sectional view showing the wire harness 10.

  The wire harness 10 includes a wire harness body 12 and a protection member 20.

  The wire harness body 12 includes at least one electric wire. Here, the wire harness body 12 is configured by bundling a plurality of electric wires. The electric wire is a wiring material for electrically interconnecting various electric devices in a vehicle body or the like. An optical cable or the like may be included in the wire harness body 12.

  The protection member 20 includes a path restriction portion 30 and a contact sound countermeasure portion 40, which are constituted by the same single non-woven member 26.

  Here, as the non-woven member, one that can be hardened through a heating step can be used. As such a non-woven member, a material including a basic fiber and an adhesive resin (also called a binder) intertwined with the basic fiber can be used. The adhesive resin is a resin having a melting point (for example, 110 ° C. to 115 ° C.) lower than the melting point of the basic fiber. When the nonwoven member is heated to a processing temperature lower than the melting point of the basic fiber and higher than the melting point of the adhesive resin, the adhesive resin melts and penetrates between the basic fibers. Thereafter, when the nonwoven member has a temperature lower than the melting point of the adhesive resin, the adhesive resin is solidified in a state where the basic fibers are bonded to each other. Thereby, the nonwoven member becomes harder than the state before heating, and is maintained in the molded shape at the time of heating. Further, in a portion where the nonwoven members are in contact with each other, the molten adhesive resin is also infiltrated into the contact portion and solidifies. Thereby, the contact part of nonwoven members is joined.

  However, the basic fiber may be any fiber that can maintain the fiber state at the melting point of the adhesive resin, and various fibers can be used in addition to the resin fiber. As the adhesive resin, thermoplastic resin fibers having a melting point lower than that of the basic fiber can be used. The adhesive resin may be granular or fibrous. Alternatively, an adhesive resin layer may be formed on the outer periphery of the core fiber to form a binder fiber, which may be entangled with the basic fiber. As the core fiber in this case, the same material as the basic fiber can be used.

  Examples of the combination of the basic fiber and the adhesive resin include an example in which the basic fiber is a resin fiber of PET (polyethylene terephthalate) and the adhesive resin is a copolymer resin of PET and PEI (polyethylene isophthalate). In this case, the melting point of the basic fiber is approximately 250 ° C., and the melting point of the adhesive resin is 110 ° C. to 150 ° C. For this reason, when the nonwoven member is heated to a temperature of 110 ° C. to 250 ° C., the adhesive resin is melted and soaked between the basic fibers that keep the fiber shape without melting. And when a nonwoven member becomes temperature lower than melting | fusing point of adhesive resin, adhesive resin solidifies in the state which couple | bonded basic fibers, The maintenance of the said shaping | molding shape and joining of nonwoven members are performed.

  The path restricting portion 30 is formed by hot pressing in a state where the first region portion 22 which is a part of the non-woven member 26 is wound around at least a part of the wire harness main body 12. The route restricting portion 30 may cover substantially the entire longitudinal direction of the wire harness body 12, or may cover a part of the wire harness body 12.

  Here, the hot press refers to performing a heat treatment on the non-woven member and a process of pressing the non-woven member against a mold to form a predetermined shape. The heat treatment and the forming process into a predetermined shape may be performed simultaneously, or may be performed separately continuously. For example, after heating a non-woven member in a compressed state, the non-woven member can be maintained in the bent shape by being pressed against a predetermined mold and bent before being solidified by cooling. An example of hot pressing suitable for manufacturing the protective member 20 according to this embodiment will be described in detail later.

  The entire outer peripheral surface of the path regulating portion 30 is sufficiently compressed and cured by hot pressing to have a hardness that can protect the wire harness body 12 and a shape maintaining property that can maintain the path. Yes. And when this path | route control part 30 is formed in the shape (it may be linear form and may be curved) according to the installation path | route in the vehicle etc. of the wire harness main body 12, the wire harness main body 12 is formed. The path shape is maintained. Here, the path restricting portion 30 is configured such that the cross-sectional shape in a direction orthogonal to the axial direction is formed in a circular shape, but is formed in a cross-sectional elliptical shape, a cross-sectional polygonal shape, or the like. May be.

  The contact sound countermeasure portion 40 includes a second region portion 24 integrally formed at a winding end portion of the first region portion 22 of the non-woven member 26 and is wound around the route restricting portion 30, and an outer peripheral exposed portion thereof. At least a part of is kept in a state where it is not hot pressed.

  Here, the entire outer peripheral exposed portion of the contact sound countermeasure portion 40 is kept in a state where it is not hot pressed. However, there is no problem even if a part of the outer peripheral exposed portion of the contact sound countermeasure portion 40 is hot pressed. For example, in a state where the wire harness 10 is disposed in a vehicle, only a part assumed to contact peripheral parts of the wire harness 10 is maintained in a soft state without being hot pressed, and the other part is hot pressed. May be.

  Further, the contact sound countermeasure portion 40 is partially provided in the extending direction of the route restricting portion 30. That is, the second region portion 24 is partially provided in the extending direction of the end of winding of the first region portion 22, and the second region portion 24 is wound around the route restriction portion 30. Thereby, it can be set as the structure by which the contact sound countermeasure part 40 was partially provided in the longitudinal direction of the protection member 20, and the path | route control part 30 is exposed except the part in which the said contact sound countermeasure part 40 was provided. It can be set as a comparatively small diameter structure.

  Here, the contact sound countermeasure portion 40 is provided at one place in the extending direction of the route restricting portion 30, but the contact sound countermeasure portion is provided at a plurality of locations at intervals in the extending direction of the route restricting portion. It may be. Moreover, the contact sound countermeasure part may be provided in the whole extending direction of the route restriction part.

  Here, the wound state of the second region portion 24 with respect to the route restricting portion 30 is maintained by an adhesive tape. More specifically, a double-sided tape 28, which is a type of adhesive tape, is applied to the inner surface side of the end of winding of the second region portion 24, and the double-sided tape 28 is attached to the wound portion of the second region portion 24. By sticking on the outer surface, the winding state of the second region portion 24 is maintained.

  In addition, after winding the 2nd area | region part 24, the winding state of the 2nd area | region part 24 may be made | formed by winding an adhesive tape around the outer periphery. In addition, like the wire harness 10B according to the modified example illustrated in FIG. 3, the wound state of the second region portion 24 may be maintained by the welded portion 28B. For example, after the second region portion 24 is wound, the welding portion 28B presses the heating member, the ultrasonic vibration applying head 29B, or the like to the end portion of the winding, so that the end portion of the second region portion 24 is wound. For example, the second region portion 24 is melted partially and fixed to the outer surface of the wound portion of the second region portion 24.

  According to the wire harness 10 configured as described above, the route restriction of the wire harness main body 12 can be performed by the route restriction portion 30. In addition, since at least a part of the outer periphery exposed portion of the contact sound countermeasure portion 40 is kept in a state where it is not hot pressed, the hot press of the contact sound countermeasure portion 40 is not performed when the wire harness 10 is laid on a vehicle or the like. When the soft part comes into contact with its peripheral parts, it is possible to effectively suppress the interference sound caused by the contact with other parts. Further, since the second region portion 24 constituting the contact sound countermeasure portion 40 is integrally formed at the end of winding of the first region portion 22 of the non-woven member 26 constituting the route restriction portion 30, the route restriction portion is formed. Therefore, the positional deviation of the contact sound countermeasure portion 40 with respect to 30 can be effectively suppressed.

  In addition, when a soft tape or the like is separately wound around the wire protection portion formed to be relatively hard, a material management, a storage place, and the like that are separate from the non-woven member 26 are required. In particular, if it is necessary to change the width, thickness, etc. of the soft tape according to the situation of the installation location of the wire harness, it is necessary to manage and store many types of soft tape, increasing the manufacturing cost, and the soft tape. This was a factor that caused incorrect installation of the machine. On the other hand, in the said wire harness 10, what is necessary is just to manage and store one component as the non-woven member 26, and can manage material management and storage cost low. Further, even if there is a design change, it can be handled relatively easily by changing the width, length, etc. of the second region portion 24.

  Moreover, in the said wire harness 10, since the whole outer periphery exposed part of the contact sound countermeasure part 40 is kept in the state which is not hot-pressed, a contact sound countermeasure can be taken in the whole outer periphery exposed part.

  Further, since the contact noise countermeasure portion 40 is partially provided in the extending direction of the route restriction portion 30, the contact noise countermeasure can be partially applied to the route restriction portion 30. Moreover, in the area | region where the contact sound countermeasure part 40 is not provided among the path | route control parts 30, it can be kept at a comparatively thin outer diameter.

  Further, the contact sound countermeasure portion 40 can easily maintain the winding state of the second region portion 24 around the route restriction portion 30 by an adhesive tape (for example, double-sided tape 28), a partial welded portion 28B, or the like. it can.

  A method example for manufacturing the wire harness 10 will be described.

  First, as shown in FIGS. 4 and 5, the first region portion 22 of the non-woven member 26 is wound around at least a part of the wire harness body 12. Here, as the non-woven member 26, one having a configuration in which a band-shaped second region portion 24 is integrally formed at the center of one side of the first region portion 22 having a rectangular shape (a portion serving as a winding end portion) is used. Then, the first region portion 22 of the non-woven member 26 is wound around the wire harness body 12 one or more times. The second region portion 24 extends from the end of winding of the wound first region portion 22.

  Next, the first region portion 22 of the non-woven member 26 is hot pressed to form the path restriction portion 30. Here, a configuration example of a hot press mold will be described. FIG. 6 is an explanatory view showing a hot press mold 60, and FIG. 7 is a schematic cross-sectional view of the hot press mold 60 during hot press processing.

  The hot press mold 60 includes a lower mold 62 as a first mold, an upper mold 72 as a second mold, and a lid 80.

  The lower mold 62 is a long member formed of a metal or the like having excellent thermal conductivity, and a lower mold surface (first mold surface) 63 is formed on one main surface (upper surface) thereof. The lower die surface 63 is roughly a groove surrounded by a bottom portion 64 having a semi-cylindrical surface shape and a pair of side portions 65 extending in a planar shape from both side portions of the bottom portion 64 and opening upward. It is formed into a shape. The length of the lower mold surface 63 in the longitudinal direction is formed substantially the same as the length of the protection target portion (portion to be covered by the protection member 20) in the wire harness body 12. Further, the lower mold surface 63 is formed in a shape extending according to a route when the protection target portion in the wire harness body 12 is disposed on the vehicle body (in FIG. 6, it may be linear or curved).

  Further, a side opening 66 is formed in the one side portion 65 so as to be recessed from the distal end side edge portion of the side portion 65 toward the proximal end side.

  The opening width of the side opening 66 is set to be the same as the width of the second region portion 24. The position of the bottom 66a of the side opening 66 is set to the position of the side edge of the bottom 64 having an arc shape, that is, the position of the lowermost portion of the lower mold surface 63 where the width is the largest. Yes. Thereby, the thickness dimension (thickness between the lower mold surface 63 side and the outer portion) of the bottom portion 66a of the side opening 66 is reduced, and the second region portion disposed through the side opening 66 is provided. 24 and the bottom 66a of the side opening 66 can be made as small as possible. Note that the position of the bottom 66a of the side opening 66 may be adjusted within a range necessary to ensure a gap for allowing the nonwoven member 26 to pass therethrough.

  In addition, lid housing recesses 67 are formed in portions on the lower mold surface 63 side of both side portions of the side opening 66. The bottom 66 a of the side opening 66 is recessed through the step portion from the bottom 67 a of the lid housing recess 67. Then, when both sides of the lid 80 are fitted into the lid accommodating recess 67 and the lid 80 is set in the side opening 66, both ends of the edge 82 on the bottom side of the lid 80 are connected to the bottom 67a. The state is maintained in contact with each other, and a state in which a gap is provided between the edge portion 82 of the lid portion 80 and the bottom portion 66a of the side opening portion 66 is maintained. The width of the gap is preferably equal to or smaller than the thickness of the non-woven member 26 (small in a range that allows passage through in a compressed state).

  Further, a concave portion 66h that is recessed from the inner portion is formed in the outer portion of the bottom portion 66a of the side opening 66. Also by the recess 66h, the contact between the lower mold 62 and the second region portion 24 drawn out through the side opening 66 is suppressed as much as possible.

  The lid 80 is configured to be able to close the side opening 66 in a state where a gap is provided between the lid 80 and the bottom 66 a of the side opening 66. Here, as described above, the bottom 66a of the side opening 66 is recessed from the bottoms 67a at both ends thereof, so that the gap between the edge 82 of the lid 80 and the bottom 66a of the side opening 66 is reduced. A gap is provided. However, in other configurations, for example, protrusions are provided at both ends of the bottom edge of the lid, and the intermediate portion of the edge of the lid is lifted from the bottom of the side opening by the protrusion. Also good. Moreover, the bottom part of the side opening part and the bottom part of the both ends may correspond, and it is good also as a structure by which a cover part is mounted on the 2nd area | region part which passes a side opening part.

  Further, the edge portion 82 of the lid portion 80 that faces the bottom portion 66a of the side opening 66 is formed in a shape that gradually becomes thinner toward the tip side. More specifically, the entire surface of the lower mold surface 63 in the lid portion 80 is formed in a planar shape. Further, of the outward surface of the lid portion 80, a portion on the edge portion 82 side is formed on a surface (here, a curved surface) that is inclined inward toward the tip side.

  When the lid 80 is attached to the side opening 66, the inward surface of the lid 80 continues to be flush with the lower mold surface 63. Further, a gap is provided between the edge portion 82 of the lid portion 80 and the bottom portion 67 a of the side opening 66. The gap is formed in a shape that gradually widens toward the outside by processing the edge of the lid 80 gradually thin as described above. Therefore, on the extension of the lower mold surface 63, the first region portion 22 can be heated and processed as firmly as possible, while the second region portion 24 is prevented from being heated and pressurized as far as possible from the lower mold surface 63. Can be.

  The upper die 72 is a long member formed of a metal or the like having excellent thermal conductivity, and an upper die having a groove shape that is open on the one main surface (lower surface) of which the upper portion has a semi-cylindrical surface shape. A surface (second mold surface) 73 is formed. The upper mold surface 73 is formed to have a width that can be disposed in the lower mold surface 63 while closing the upper opening (opening facing the bottom portion 64) of the lower mold surface 63. Further, the upper mold surface 73 is formed in a shape extending according to the bent shape of the lower mold surface 63.

  Then, the upper mold surface 73 is disposed in the lower mold surface 63 in a state where the side opening 66 is closed with the lid 80, so that the upper mold surface 73, the lower mold surface 63, and the lid 80 are separated. A space in which the path restriction portion 30 can be formed is formed. The lower mold 62 and the upper mold 72 are provided with a heating unit 68 such as a heater.

  Then, the first region portion of the non-woven member 26 wound around the wire harness body 12 is disposed in the lower mold surface 63. At this time, the second region portion integrally formed at the end of winding of the first region portion 22 is extended outward through the side opening 66.

  Thereafter, the side opening 66 is closed with the lid 80. Specifically, both sides of the lid 80 are inserted into the lid accommodating recess 67 from above the side opening 66. When both end portions of the edge portion 82 of the lid portion 80 are in contact with the bottom portion 67a of the lid portion accommodating recess 67, a gap is provided between the edge portion 82 of the lid portion 80 and the bottom portion 66a of the side opening 66. The second region portion 24 is pulled out through the gap.

  Then, the upper mold surface 73 of the upper mold 72 is inserted into the lower mold surface 63, and the upper opening of the lower mold surface 63 is closed by the upper mold surface 73.

  In this state, when the lower die 62 and the upper die 72 are heated and hot pressing is performed, the first region portion 22 of the non-woven member 26 is heated between the lower die surface 63 and the upper die surface 73 in a compressed state.

  Thereafter, when the first region portion 22 is cooled, the surface of the first region portion 22 is cured in a shape corresponding to the shapes of the lower die surface 63 and the upper die surface 73, thereby forming the path regulating portion 30. Is done. The first region portion 22 may be cooled in the hot press mold 60 or may be taken out from the hot press mold 60.

  Next, as shown in FIG. 8, the second region portion 24 is wound around the route restriction portion 30 one or more times. In addition, when it is only necessary to take a soundproofing measure for only a part of the outer periphery of the route restricting portion 30, the second region portion may be wound around the route restricting portion less than one turn. And if the winding state of the 2nd area | region part 24 is maintained by the double-sided tape 28 etc., the contact sound countermeasure part 40 will be formed. Thereby, the protection member 20 is formed in the outer periphery of the wire harness main body 12, and the wire harness 10 is completed.

  According to the hot press mold 60 and the method of manufacturing the wire harness 10 using the hot press mold 60, the first region portion 22 of the non-woven member 26 is wound around the wire harness body 12, The first region portion 22 of the nonwoven member 26 can be hot pressed between the mold surface 63 and the upper mold surface 73. At this time, the second region portion 24 is made to extend outward through a gap between the bottom portion 66a of the side opening 66 and the edge portion 82 of the lid portion 80, thereby making the second region portion 24 hot. It can be kept in a non-pressed state. Further, since the side opening 66 is closed by the lid 80, both sides of the lid 80 are accommodated in surface contact with the lid accommodating recess 67. The heat is transmitted enough. For this reason, the 1st area | region part 22 can be heated and hot-pressed also by the inner surface of the cover part 80, and the 1st area | region part 22 can be hot-pressed over the whole as much as possible.

  Further, since the bottom 64 of the lower mold surface 63 has an arc shape, and the bottom 66a of the side opening 66 is located at the side edge of the bottom 64 of the lower mold 63, the bottom of the side opening 66 The thickness of 66a can be made as small as possible. Accordingly, the contact area between the lower mold 62 and the second region portion 24 disposed through the gap between the bottom portion 66a of the side opening 66 and the edge portion 82 of the lid portion 80 can be reduced. The second region portion 24 can be kept in a soft state as much as possible.

  Further, since the edge portion 82 of the lid portion 80 is formed in a shape that becomes gradually thinner toward the tip side, the contact area between the lid portion 80 and the second region portion 24 can be made as small as possible. Also from this point, the second region portion 24 can be kept as soft as possible as much as possible without being heated as much as possible.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Wire harness 12 Wire harness main body 20 Protection member 22 1st area | region part 24 2nd area | region part 26 Non-woven member 28 Double-sided tape 28B Welding part 30 Path | route control part 40 Contact sound countermeasure part 60 Hot press shaping | molding die 62 Lower mold 63 Lower Mold surface 64 Bottom portion 65 Side portion 66 Side opening 66a Bottom portion 72 Upper mold 73 Upper mold surface 80 Lid portion 82 Edge portion

Claims (4)

  A groove-shaped first mold surface surrounded by the bottom portion and the pair of side portions is formed, and a side opening is formed so as to be recessed from the distal end side edge portion of one of the side portions toward the proximal end side. The first type,
  In a state where a gap is provided between the bottom of the side openings, a lid that can close the side openings,
  A second mold formed with a second mold surface that closes an opening facing the bottom of the first mold surface;
  A hot press mold.   A hot press mold according to claim 1,
  A mold for hot pressing, wherein a bottom surface of the first mold surface has an arc shape, and a bottom portion of the side opening is located at a side edge of the bottom surface of the first mold surface.   A hot press mold according to claim 1 or claim 2,
  The edge part which opposes the bottom part of the said side opening part among the said cover parts is a hot press shaping | molding die currently formed in the shape which becomes thin gradually toward the front end side.   It is a manufacturing method of the wire harness using the hot-press mold according to any one of claims 1 to 3,
  (A) winding the first region portion of the nonwoven member around at least a part of the wire harness body;
  (B) disposing the first region portion wound around at least a part of the wire harness body in the first mold surface;
  (C) a step of extending the second region portion integrally formed at the end of winding of the first region portion out of the non-woven member through the side opening, and
  (D) closing the side opening with the lid;
  (E) closing the opening facing the bottom of the first mold surface with a second mold surface;
  (F) heating the first mold surface and the second mold surface;
  A method of manufacturing a wire harness comprising:

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