Temporary fastening method for wire harness assemblies

Abstract

This invention provides a method for temporarily fastening a wire harness assembly to improve the efficiency of wire harness routing work when attaching the wire harness assembly to the back door of a vehicle. [Solution] A method for temporarily fixing a wire harness assembly 20 to an inner panel 11c that constitutes the back door 10 of a vehicle 1, the assembly 20 comprising a wire harness 24 and a sound-insulating assembly member 21 having two flexible laminated members, a base material 22 and a cover material 23, which are laminated while sandwiching a portion of the wires 25 of the wire harness 24, wherein a locking piece such as a first locking piece 13a is formed on the inner panel 11c when the inner panel 11c is press-molded, and before routing the wires 25 exposed from the assembly member 21 to the back door 10, the edge of the assembly member 21 positioned in a predetermined mounting area 11d on the inner panel 11c is supported by a plurality of locking pieces, thereby holding the assembly member 21 to the inner panel 11c.

Description

Technical Field

[0001] The present invention relates to a temporary fixing method for a wire harness assembly.

Background Art

[0002] Conventionally, in the manufacturing process of vehicles such as automobiles, there is a process of attaching a backdoor module having a wire harness to the inner panel of the backdoor. In this process, generally, an operation may occur in which an operator lifts the backdoor module upward with respect to the backdoor that is in an upwardly open state. Patent Document 1 discloses a technique related to a method of carrying a vehicle backdoor module from the outdoor side into the room through an opening surrounded by a window frame portion of a closed backdoor and attaching it to the inner panel on the indoor side of the backdoor in order to reduce the physical burden on the operator.

[0003] On the other hand, as a structure assumed to be attached to the inner panel of the backdoor, a wire harness assembly having a panel-shaped assembly member excellent in sound insulation is mentioned separately from the backdoor module shown in Patent Document 1. Patent Document 2 discloses a technique related to a wire harness assembly provided with a sound insulation member having a porous body and a sheet-like body integrally provided on one surface side of the porous body, and a wire harness is disposed between the porous body and the sheet-like body.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Let's consider a case where the mounting method for a vehicle back door module disclosed in Patent Document 1 is used to attach the wire harness assembly disclosed in Patent Document 2 to the inner panel of the back door. In this case, during the wire harness assembly mounting process, for example, it is not necessarily the case that the rear glass is not attached to the window frame of the back door, nor is it necessarily the case that all the wires of the wire harness can be routed through the opening in the window frame. Therefore, it is practically difficult to attach the wire harness assembly to the back door based on such assumptions.

[0006] On the other hand, consider a scenario where a worker lifts the wire harness assembly disclosed in Patent Document 2 upwards to install it on a back door that is open upwards. In this case, if the worker attempts to route the multiple wires of the wire harness to the back door, the assembly member will be suspended in mid-air in an unstable position. Such a suspended assembly member can hinder the worker's wiring work and therefore requires improvement.

[0007] This invention has been made in view of the problems of the prior art. The object of this invention is to provide a method for temporarily fastening a wire harness assembly to improve the work efficiency related to the routing of wire harnesses when attaching a wire harness assembly to the back door of a vehicle. [Means for solving the problem]

[0008] An aspect of the present invention is a method for temporarily fastening a wire harness assembly to an inner panel constituting the back door of a vehicle, the assembly comprising a wire harness and a sound-insulating assembly member having two flexible laminated members laminated while sandwiching a portion of the wires of the wire harness, wherein a plurality of locking pieces are formed on the inner panel during press molding of the inner panel, and the assembly member is held to the inner panel by supporting the edge of the assembly member, which is positioned in a predetermined mounting area on the inner panel, with the plurality of locking pieces before routing the wires exposed from the assembly member to the back door. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a method for temporarily fastening a wire harness assembly to the back door of a vehicle, thereby improving the efficiency of the work involved in routing the wire harness. [Brief explanation of the drawing]

[0010] [Figure 1] This figure shows the temporary fastening state of the wire harness assembly according to the first embodiment. [Figure 2] This figure shows the back door in temporary fastening in the first embodiment. [Figure 3] This is a diagram of the back door in the first embodiment. [Figure 4] This is a perspective view of a wire harness assembly. [Figure 5] This figure shows the temporary fastening process for a wire harness assembly according to the first embodiment. [Figure 6] This figure shows the back door in temporary fastening in the second embodiment. [Figure 7] This is a diagram of the back door in the second embodiment. [Figure 8] This figure shows the temporary fastening process for a wire harness assembly according to the second embodiment. [Modes for carrying out the invention]

[0011] The temporary fastening methods for wire harness assemblies according to each embodiment will be described in detail below using the drawings. Note that the dimensional ratios in the drawings are exaggerated for illustrative purposes and may differ from the actual ratios.

[0012] (First Embodiment) Figure 1 is a perspective view showing the temporarily fastened state of the wire harness assembly 20 according to the temporary fastening method of the wire harness assembly 20 according to the first embodiment.

[0013] The wire harness assembly 20, which will be described in detail below, is attached to an inner panel 11c that constitutes a back door 10 of a vehicle 1 such as an automobile. Here, in the present embodiment, when the vehicle 1 is in a product state, that is, when the manufacturing process of the vehicle 1 is completed, the state of the wire harness assembly 20 is defined as the final fixing state of the wire harness assembly 20.

[0014] On the other hand, during the manufacturing process of the vehicle 1, in the attachment process of the wire harness assembly 20 to the inner panel 11c, there is an operation of laying each electric wire 25, which is a part of the wire harness assembly 20, on the inner panel 11c. And in the present embodiment, the state in which the attachment member 21, which is a part of the wire harness assembly 20, is held by the inner panel 11c during the wiring operation of the electric wire 25 is defined as the temporary fixing state of the wire harness assembly 20. Note that when the wire harness assembly 20 is in the final fixing state, the temporary fixing state may be released and the final fixing may be performed by adopting an attachment structure different from the attachment structure at the time of temporary fixing, or the attachment structure at the time of temporary fixing may be maintained as it is.

[0015] Also, in the present embodiment, the wiring operation of the electric wire 25, including the temporary fixing operation of the wire harness assembly 20, is assumed to be performed by an operator with the back door 10 open upward as shown in FIG. 1. The specific structure of the vehicle 1 including the back door 10 and the structure for maintaining the open state of the back door 10 are not particularly limited. That is, these structures shown in FIG. 1 are an example.

[0016] FIG. 2 is a plan view showing the back door 10 in a state where the wire harness assembly 20 is temporarily fixed, as viewed from below the back door 10 in the open state shown in FIG. 1. In FIG. 2, the illustration of the structure of each part of the vehicle 1 other than the back door 10 is omitted. FIG. 3 is a plan view of the back door 10 in a state where the wire harness assembly 20 has not yet been temporarily fixed.

[0017] The back door 10 includes a back door main body 11 and a rear glass 12. The back door main body 11 is a structure composed of an inner panel 11c manufactured by subjecting a metal plate material to various processes and an outer panel (not shown) and the like. The back door main body 11 includes, for example, an upper structure portion 11a and a lower structure portion 11b.

[0018] The upper structure portion 11a is a structure portion located above the lower structure portion 11b in the back door main body 11 when the back door 10 is in a closed state. The upper structure portion 11a has a window frame portion 11e as an opening for assembling the rear glass 12. Further, in the present embodiment, since the back door 10 has a structure that opens upward, a plurality of hinge portions 16 for supporting the back door 10 to be openable and closable with respect to the vehicle 1 are attached to a connection portion of the upper structure portion 11a to the ceiling portion of the vehicle 1.

[0019] The lower structure portion 11b is a structure portion located at the lowest position near the ground surface in the back door main body 11 when the back door 10 is in a closed state. The mounting member 21 included in the wire harness assembly body 20 is attached to a mounting region 11d preset on a portion of the inner panel 11c that exists in the lower structure portion 11b. Further, as shown in FIG. 1, when the back door 10 is in an open state, the lower structure portion 11b is inclined so that the side continuous with the upper structure portion 11a in the opening and closing direction is higher from the ground surface than the back door tip portion 11f on the opposite side in the opening and closing direction.

[0020] Further, the inner panel 11c has a plurality of openings 13 so as to straddle at least the outer peripheral portion of the mounting region 11d. The opening 13 is a through portion that communicates with the door inner space formed between the inner panel 11c and the outer panel from the outside of the inner panel 11c. For example, the opening 13 may be used when an operator connects electric wires to each other or inserts a tool from the outside when various electric wires are routed in the door inner space.

[0021] Furthermore, a first locking piece 13a having a shape added to the opening 13 is formed in one of the multiple openings 13 provided in the inner panel 11c. Here, the addition of the first locking piece 13a to the opening 13 means, for example, assuming the opening shape of an opening 13 where no locking piece is formed, a first locking piece 13a is newly provided that protrudes so as to cover a part of the opening shape. The shape of the first locking piece 13a is, as an example, a long plate shape with one end being a free end and the other end being a fixed end. Also, the edge of the tip portion 13b of the first locking piece 13a is curved or semicircular.

[0022] In this embodiment, a pair of first locking pieces 13a constituting one set are arranged to align with the left and right ends of the mounting area 11d. Here, the left and right ends of the mounting area 11d refer to the two opposing ends in the mounting area 11d along the width direction perpendicular to the opening and closing direction of the back door 10. In this embodiment, two such pairs of first locking pieces 13a are formed. In other words, in this embodiment, there are four openings 13 on which the first locking pieces 13a are formed.

[0023] In the example shown in Figure 3, the inner panel 11c is provided with four openings 13, each having a first locking piece 13a formed therein. However, in addition to these openings 13, there may be other openings 13 where the first locking piece 13a is not formed. Furthermore, the number of pairs of first locking pieces 13a on the left and right sides is not limited to two; three or more pairs may be provided.

[0024] Figure 4 is a perspective view of the wire harness assembly 20. The wire harness assembly 20 is attached to the back door 10 as described above and is applied to the wire harness 24 routed through the back door 10. The wire harness assembly 20 comprises the wire harness 24 and the assembly member 21.

[0025] The wire harness 24 is arranged in a predetermined shape inside the assembly member 21, which is assembled integrally with it. The wire harness 24 comprises a plurality of electric wires 25 and a plurality of connectors 26.

[0026] The electric wire 25 is, for example, a coated electric wire in which the outer circumference of a core wire made of a conductive material is covered with an insulating coating. Alternatively, the electric wire 25 may be a flat cable in which multiple core wires are arranged in parallel and their outer circumference is covered with an insulating coating. The multiple electric wires 25 are arranged such that one end of each is concentrated at one location relative to the assembly member 21, and the other ends branch out to each other.

[0027] In this embodiment, the wire harness 24 has, for example, four wires 25: a first wire 25a, a second wire 25b, a third wire 25c, and a fourth wire 25d. Of these, the first wire 25a, the second wire 25b, and the third wire 25c are branch wires, so-called branch lines. On the other hand, the fourth wire 25d is a so-called main line, which combines the first wire 25a, the second wire 25b, and the third wire 25c.

[0028] The connector 26 comprises a housing made of an insulating material such as synthetic resin, and terminals (not shown) made of a conductive material. The housing mates with the mating housing of a mating connector (not shown) that is electrically connected to an electrical component mounted on the back door 10. The terminals are electrically connected to the end of the electric wire 25 and housed in the housing. The terminals are electrically connected to the mating terminal housed in the mating housing when the housing and the mating housing are mated.

[0029] Since the connector 26 is connected to the terminals of multiple electric wires 25, in this embodiment there are four connectors corresponding to four electric wires 25. The connector 26 connected to the terminal of the first electric wire 25a is the first connector 26a. The connector 26 connected to the terminal of the second electric wire 25b is the second connector 26b. The connector 26 connected to the terminal of the third electric wire 25c is the third connector 26c. The connector 26 connected to the terminal of the fourth electric wire 25d is the fourth connector 26d. The fourth connector 26d is connected to a mating connector routed from the vehicle body that supports the back door 10 in the vehicle 1.

[0030] The assembly member 21 comprises a base material 22 and a cover material 23, which are flexible and stacked together as laminated members.

[0031] The base material 22 is a sheet-like member formed from a sound-insulating material such as urethane foam, polypropylene fiber, polyethylene terephthalate fiber, or polyester fiber nonwoven fabric. The base material 22 is a long plate with its longitudinal direction aligned with the width direction of the back door 10. The thickness of the base material 22 is set to, for example, about 10 to 15 mm. On the inner surface of the base material 22 facing the cover material 23, portions of the multiple wires 25 of the wire harness 24 are arranged in a predetermined shape. The terminal ends of each wire 25 connected to the connector 26 are positioned outside the base material 22.

[0032] The cover material 23 is a sheet-like member formed from a sound-insulating material such as a film made of polyvinyl chloride or polyethylene, or closed-cell or continuous foam made of polyethylene, polypropylene, polystyrene, or elastomer. The planar shape of the cover material 23 is the same as the planar shape of the base material 22. The thickness of the cover material 23 is set to, for example, about 2 mm, which is thinner than the thickness of the base material 22. Adhesive is applied to the surface of the cover material 23 that faces the base material 22, and the cover material 23 is attached to the inner surface of the base material 22 so as to sandwich a portion of the multiple electric wires 25 between the cover material 23 and the base material 22.

[0033] In the assembly member 21, multiple electric wires 25 arranged in a predetermined shape are held between the base material 22 and the cover material 23 which are attached to each other. Therefore, the assembly member 21 can protect the electric wires 25 of the wire harness 24 and maintain the arrangement shape of the electric wires 25.

[0034] Furthermore, the assembly member 21 has sound-insulating properties because at least one of the base material 22 or the cover material 23 is made of a material as exemplified above. Such an assembly member 21, having sound-insulating properties, may also be referred to as a sound-absorbing material.

[0035] Next, a method for temporarily fastening the wire harness assembly 20 according to the first embodiment will be described.

[0036] Figure 5 is a perspective view illustrating the temporary fastening process corresponding to the temporary fastening method for the wire harness assembly 20 according to this embodiment. Hereinafter, the temporary fastening process will be performed when the back door 10 is open upward in the vehicle 1.

[0037] First, four first locking pieces 13a are formed on the inner panel 11c of the back door during press forming, with a shape that allows them to be added to the opening 13. Each of the first locking pieces 13a is used to support the assembly member 21 of the wire harness assembly 20, which is located in the mounting area 11d, as shown in the following steps. Therefore, each of the first locking pieces 13a is positioned so that, when it is raised to protrude outward from the inner panel 11c as shown in Figure 5, it can face the edge of the assembly member 21 in close proximity to it.

[0038] Next, the wire harness assembly 20 illustrated in Figure 4 is prepared. Then, before the assembly member 21 is positioned in the mounting area 11d, the worker raises each of the first locking pieces 13a formed on the inner panel 11c as shown in Figure 5.

[0039] Next, before routing the electric wires 25 exposed from the assembly member 21 to the back door 10, the worker positions the assembly member 21 in the mounting area 11d such that the outer surface 22a of the base material 22 faces the mounting area 11d.

[0040] Then, the worker holds the assembly member 21 to the inner panel 11c by supporting the edge of the assembly member 21 with each first locking piece 13a. Specifically, before supporting the assembly member 21, when the assembly member 21 is positioned in the mounting area 11d, each first locking piece 13a is in an upright position near the edge of the assembly member 21. Therefore, as shown in Figures 1 and 2, the worker bends the tip 13b of each first locking piece 13a so that it collapses against the outer surface 23a of the cover material 23, thereby pressing the edge of the assembly member 21 against each first locking piece 13a.

[0041] As a result of this temporary fastening process, the assembly member 21 is temporarily fixed to the inner panel 11c, and thereafter, the worker can route each of the electric wires 25 to the predetermined positions on the back door 10 without being hindered by the assembly member 21. For example, after temporarily fastening the assembly member 21, the worker may route the fourth electric wire 25d, which is a main line having a fourth connector 26d connected to the mating connector on the vehicle body side at its end, along a predetermined path using multiple clips 30, as shown in Figure 2. After that, the worker may route the first electric wire 25a, the second electric wire 25b, and the third electric wire 25c, which are branch lines, along predetermined paths.

[0042] In this embodiment, after the assembly member 21 is positioned in the mounting area 11d, the first locking piece 13a presses against the edge of the assembly member 21 by bending its tip portion 13b from its pre-raised position. In contrast, the first locking piece 13a may not be pre-raised, for example, but rather has a shape that elastically presses against the outer surface 23a of the cover material 23 by elastic deformation in part or in whole.

[0043] Next, the effects of the temporary fastening method for the wire harness assembly 20 according to the first embodiment will be described.

[0044] The temporary fastening method involves temporarily fastening a wire harness assembly 20 to an inner panel 11c that constitutes the back door 10 of a vehicle 1. The wire harness assembly 20 comprises a wire harness 24 and a soundproof assembly member 21 having two flexible laminated members that are laminated while sandwiching a portion of the electric wires 25 of the wire harness 24. In this temporary fastening method, multiple locking pieces are formed on the inner panel 11c during press molding of the inner panel 11c. Before routing the electric wires 25 exposed from the assembly member 21 to the back door 10, the assembly member 21 is held in place by the multiple locking pieces supporting the edge of the assembly member 21 positioned in a pre-set mounting area 11d on the inner panel 11c.

[0045] Here, the two laminated members correspond to a base material 22 and a cover material 23, respectively, which are made of a flexible material, in the above example. Also, the multiple locking pieces formed on the inner panel 11c are the first locking piece 13a in the above example.

[0046] Let's consider a scenario where a worker lifts the wire harness assembly 20 upwards to install it onto the back door 10, which is open upwards. In this case, the worker can temporarily secure the assembly member 21 to the inner panel 11c by supporting the edge of the assembly member 21, which is positioned in the installation area 11d, with multiple locking pieces formed on the inner panel 11c. Therefore, the worker can efficiently route the wires 25 of the wire harness 24 without being obstructed by the assembly member 21.

[0047] As described above, according to this embodiment, it is possible to provide a method for temporarily fastening a wire harness assembly 20 that improves the work efficiency related to the routing of the wire harness 24 when attaching the wire harness assembly 20 to the back door 10 of the vehicle 1.

[0048] Furthermore, in the temporary fastening method for the wire harness assembly 20, the locking piece may be a first locking piece 13a having a shape that is attached to one of the multiple openings 13 provided in the inner panel 11c.

[0049] According to this temporary fastening method, an opening that is pre-provided in the inner panel of a typical back door can be set as the opening 13 to which the first locking piece 13a in this embodiment is added. Therefore, for example, there is no need to secure a location for the first locking piece 13a in the inner panel 11c other than the pre-provided opening, which is advantageous in that it reduces the complexity of the structure of the inner panel 11c.

[0050] Furthermore, in the temporary fastening method for the wire harness assembly 20, the back door 10 may be supported so as to be able to open and close vertically by the hinge portion 16. The inner panel 11c may have at least two pairs of first locking pieces 13a formed thereon, which are arranged to match the left and right ends facing each other along the width direction perpendicular to the opening and closing direction of the back door 10 in the mounting area 11d. The first locking pieces 13a may also press down on the edges of the assembly member 21.

[0051] According to this temporary fastening method, each first locking piece 13a presses against the edge of the assembly member 21, so that the assembly member 21 and, consequently, the wire harness assembly 20 are firmly held against the inner panel 11c. Here, when the worker routes the electric wire 25, the mounting area 11d is inclined such that the side closer to the hinge portion 16 is higher from the ground than the side closer to the back door tip portion 11f in the opening and closing direction. Even in such a case, the assembly member 21 is firmly held, which prevents it from sliding down towards the back door tip portion 11f.

[0052] Furthermore, in the temporary fastening method for the wire harness assembly 20, the edge of the tip portion 13b of the first locking piece 13a may be curved.

[0053] As described above, the opening 13 in which the first locking piece 13a is provided is intended to be used by workers when connecting wires together or inserting tools from the outside. With this temporary fastening method, since the edge of the tip portion 13b that is exposed to the opening 13 is curved, for example, it is less likely for workers to injure their hands, which is advantageous in terms of safety.

[0054] (Second Embodiment) In the temporary fastening method for the wire harness assembly 20 according to the first embodiment, an example was given in which the first locking piece 13a is formed in an opening that is expected to be provided in advance in the inner panel 11c. In contrast, in the temporary fastening method for the wire harness assembly 20 according to the second embodiment, the locking piece for supporting the assembly member 21 is formed on the inner panel 11c in a location that is not an opening as described above.

[0055] Figure 6 is a plan view of the back door 10 in a state in which the wire harness assembly 20 of this embodiment is temporarily fastened, drawn in accordance with Figure 2 of the first embodiment. Figure 7 is a plan view of the back door 10 in this embodiment in a state in which the wire harness assembly 20 has not yet been temporarily fastened, drawn in accordance with Figure 3 of the first embodiment. Figure 8 is a perspective view for explaining the temporary fastening process corresponding to the temporary fastening method of the wire harness assembly 20 according to this embodiment, drawn in accordance with Figure 5 of the first embodiment. The temporary fastening process according to this embodiment is also performed when the back door 10 is open in the vehicle 1.

[0056] First, during press forming, four second locking pieces 14a are formed on the inner panel 11c of the back door, replacing the first locking piece 13a in the first embodiment. These second locking pieces 14a have their outer edge shapes defined by notches 14 provided in the inner panel 11c. In this embodiment, the shape of the second locking pieces 14a is, for example, a strip shape with one end being a free end and the other end being a fixed end.

[0057] In this embodiment, a pair of second locking pieces 14a constituting one set are arranged to align with the upper and lower ends of the mounting area 11d. Here, the upper and lower ends of the mounting area 11d refer to the two ends of the mounting area 11d that face each other along the opening and closing direction of the back door 10. In this embodiment, two such pairs of second locking pieces 14a are formed. In other words, in this embodiment, there are four notches 14 that form the second locking pieces 14a. Note that the upper and lower pairs of second locking pieces 14a are not limited to two sets, but may be provided in three or more sets.

[0058] Furthermore, similar to the four first locking pieces 13a in the first embodiment, each second locking piece 14a is used to support the assembly member 21 of the wire harness assembly 20 located in the mounting area 11d. Therefore, each second locking piece 14a is positioned so that it can face the edge of the assembly member 21 in close proximity when it is raised to protrude outward from the inner panel 11c, as shown in Figure 8, from the state in which it is formed on the inner panel 11c immediately after press molding.

[0059] Next, the wire harness assembly 20 illustrated in Figure 4 is prepared. Then, before the assembly member 21 is positioned in the mounting area 11d, the worker raises each of the second locking pieces 14a formed on the inner panel 11c, as shown in Figure 8.

[0060] Next, before routing the electric wires 25 exposed from the assembly member 21 to the back door 10, the worker positions the assembly member 21 in the mounting area 11d such that the outer surface 22a of the base material 22 faces the mounting area 11d.

[0061] Then, the worker holds the assembly member 21 to the inner panel 11c by supporting the edge of the assembly member 21 with each second locking piece 14a. Specifically, before supporting the assembly member 21, when the assembly member 21 is positioned in the mounting area 11d, each second locking piece 14a is in an upright position near the edge of the assembly member 21. Therefore, as shown in Figure 6, the worker bends the tip of each second locking piece 14a so that it folds down against the outer surface 23a of the cover material 23, thereby pressing the edge of the assembly member 21 against each second locking piece 14a.

[0062] Even with the temporary fastening process according to this embodiment, the assembly member 21 is temporarily fastened to the inner panel 11c, so thereafter, the worker can route each electric wire 25 to the predetermined position on the back door 10 without being hindered by the assembly member 21.

[0063] Thus, in the temporary fastening method for the wire harness assembly 20 according to this embodiment, the locking piece may be a second locking piece 14a whose outer edge shape is defined by a notch 14 provided in the inner panel 11c.

[0064] According to this temporary fastening method, for example, the position in which the second locking piece 14a is formed is not limited to the position of an opening provided in advance in the inner panel 11c, so the second locking piece 14a can be provided in a position more suitable for supporting the assembly member 21.

[0065] Furthermore, in the temporary fastening method for the wire harness assembly 20 according to this embodiment, the back door 10 may be supported so as to be able to open and close vertically by the hinge portion 16. The inner panel 11c may have at least two pairs of second locking pieces 14a formed thereon, which are arranged to match the upper and lower ends that face each other along the opening and closing direction of the back door 10 in the mounting area 11d. The second locking pieces 14a may either press down on the edge of the assembly member 21 or be bent into a hook shape to hook onto the edge of the assembly member 21.

[0066] According to this temporary fastening method, if each second locking piece 14a presses against the edge of the assembly member 21, the assembly member 21 and thus the wire harness assembly 20 are firmly held against the inner panel 11c, thus achieving the same effect as in the first embodiment.

[0067] On the other hand, in this embodiment as well, when a worker routes the electric wire 25, the mounting area 11d is inclined such that the side closer to the hinge portion 16 in the opening and closing direction is higher from the ground than the side closer to the back door tip portion 11f. In contrast, the pair of second locking pieces 14a are positioned to match the upper and lower ends of the mounting area 11d that are opposite each other along the opening and closing direction of the back door 10. Therefore, the pair of second locking pieces 14a can prevent the assembly member 21 from sliding down toward the back door tip portion 11f by simply hooking onto the edge of the assembly member 21 by bending it into a hook shape, without having to firmly hold the assembly member 21.

[0068] Although each embodiment has been described above, the embodiments are not limited to these, and various modifications are possible within the scope of the gist of the embodiments. [Explanation of symbols]

[0069] 1 vehicle 10 Back door 11c Inner Panel 11d Mounting area 13 Opening 13a First locking piece 13b Tip 14 Notches 14a Second locking piece 16. Hinge section 20 Wire harness assembly 21 Assembly components 22 Base material 23 Cover material 24 Wire Harness 25 Electric wire

Claims

1. A method for temporarily fastening a wire harness assembly to an inner panel constituting the back door of a vehicle, the assembly comprising a wire harness and a sound-insulating assembly member having two flexible laminated members that are laminated while sandwiching a portion of the wires of the wire harness, During the press molding of the inner panel, a plurality of locking pieces are formed on the inner panel. A method for temporarily securing a wire harness assembly, wherein, before routing the exposed wires from the assembly member to the back door, the edge of the assembly member, which is positioned in a predetermined mounting area on the inner panel, is supported by a plurality of locking pieces, thereby holding the assembly member to the inner panel.

2. The method for temporarily fastening a wire harness assembly according to claim 1, wherein the locking piece is a first locking piece having a shape attached to one of a plurality of openings provided in the inner panel.

3. The aforementioned back door is supported by a hinge that allows it to open and close vertically. The inner panel has at least two sets of the first locking pieces formed thereon, which are arranged to align with the left and right ends facing each other along the width direction perpendicular to the opening and closing direction of the back door in the mounting area. The method for temporarily fastening a wire harness assembly according to claim 2, wherein the first locking piece presses against the edge of the assembly member.

4. The temporary fastening method for a wire harness assembly according to claim 2 or 3, wherein the edge of the tip of the first locking piece is curved.

5. The method for temporarily fastening a wire harness assembly according to claim 1, wherein the locking piece is a second locking piece whose outer edge shape is defined by a notch provided in the inner panel.

6. The aforementioned back door is supported by a hinge that allows it to open and close vertically. The inner panel has at least two sets of the second locking pieces formed thereon, which are arranged to match the upper and lower ends facing each other along the opening and closing direction of the back door in the mounting area. The method for temporarily fastening a wire harness assembly according to claim 5, wherein the second locking piece presses against the edge of the assembly member or is bent into a hook shape to hook onto the edge of the assembly member.

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