Wire harness fixing structure and wire harness

A wire harness fixing structure includes a plate-like member including a first layer and a second layer softer than the first layer, an electrical wire disposed along the plate-like member, and a fixing member attached to the electrical wire to fix the electrical wire to the plate-like member. The fixing member includes: a through locking piece formed to be able to pass through the first layer and locked to the first layer while passing through the first layer, a regulation piece provided with a space between the regulation piece and the through locking piece to stop the through locking piece from passing through a surface of the plate-like member, and a column connecting the through locking piece and the regulation piece.

TECHNICAL FIELD

The present invention relates to a technique of fixing a wire harness to a mounting object.

BACKGROUND ART

A technique of fixing a wire harness to a mounting object is described in Patent Documents 1 and 2, for example. Patent Document 1 discloses a technique of fixing a wire harness to a mounting object using a clamp (also referred to as a clip, for example). Patent Document 2 discloses a technique of fixing a roof harness to a roof lining (also referred to as a head lining or a roof trim, for example).

Herein, when the wire harness is fixed using the clamp as is the case for Patent Document 1, a hole for fixing the clamp needs to be formed in the mounting object. However, when the mounting object of the wire harness is a member exposed indoors such as the roof lining described in Patent Document 2, there is a possibility that the clamp may be exposed indoors in a case where a hole for fixing the clamp is formed in the member and the clamp is inserted into and locked to the hole. As described above, it may not be appropriate in some cases, depending on the mounting object, to apply the technique of forming the hole for fixing the clamp and fixing the clamp.

Thus, in Patent Document 2, the roof harness is fixed to the roof lining by an adhesive agent such as a pressure sensitive adhesive tape or a hot-melt material.

PRIOR ART DOCUMENTS

Patent Documents

SUMMARY

Problem to be Solved by the Invention

However, there is a possibility that the number of manufacturing processes in assembling a vehicle increases in a fixing method using the adhesive agent such as the pressure sensitive adhesive tape or the hot-melt material.

An object of the present invention is to provide a technique capable of simply fixing a wire harness in assembling a vehicle even to a mounting object which is not suitable for having a clamp hole to fix a clamp.

Means to Solve the Problem

In order to solve the above problem, a wire harness fixing structure according to a first aspect includes: a plate-like member including a first layer and a second layer and interiorly mounted on a vehicle, the second layer stacked on a first main surface of the first layer and softer than the first layer; and a wire harness including an electrical wire disposed along the plate-like member and a fixing member attached to the electrical wire to fix the electrical wire to the plate-like member, wherein the fixing member includes: a through locking piece in which a tip portion is formed into a shape of being able to pass through a portion in the first layer where a hole is not formed from a second main surface at an opposite side of the first layer from the first main surface and is locked to the first main surface while passing through the first layer; a regulation piece provided with a space between the regulation piece and the through locking piece to stop the through locking piece from passing through a surface of the plate-like member; and a column connecting the through locking piece and the regulation piece.

The wire harness fixing structure according to a second aspect is the wire harness fixing structure according to the first aspect, wherein the plate-like member further includes a third layer stacked on an opposite side of the second layer from the first layer and formed harder than the second layer.

The wire harness fixing structure according to a third aspect is the wire harness fixing structure according to the first or second aspect, wherein the electrical wire is disposed in a flat state.

The wire harness fixing structure according to a fourth aspect is the wire harness fixing structure according to the third aspect, wherein the wire harness further includes an electrical wire fixing sheet part which is formed into a sheet and the electrical wire is fixed to by sewing or welding.

The wire harness fixing structure according to a fifth aspect is the wire harness fixing structure according to any one of the first to fourth aspects, wherein the wire harness further includes a fixing member attaching sheet part which is formed into a sheet, the fixing member is attached to, and intervenes between the regulation piece and the first layer.

The wire harness fixing structure according to a sixth aspect is the wire harness fixing structure according to any one of the first to fifth aspects, wherein the fixing member includes: a first member including the through locking piece and the column, a hole formed in the column; and a second member including an insertion part which is inserted into the hole to maintain a state where the through locking piece is locked to the plate-like member.

The wire harness fixing structure according to a seventh aspect is the wire harness fixing structure according to any one of the first to sixth aspects, wherein the plate-like member and the fixing member have characteristics that the through locking piece of the fixing member can pass through a portion in the plate-like member where a hole is not formed and be locked to the portion.

A wire harness according to an eighth aspect includes: an electrical wire disposed along a plate-like member which includes a first layer and a second layer and is interiorly mounted on a vehicle, the second layer stacked on a first main surface of the first layer and softer than the first layer; and a fixing member attached to the electrical wire to fix the electrical wire to the plate-like member, wherein the fixing member includes: a through locking piece in which a tip portion is formed into a shape of being able to pass through a portion in the first layer where a hole is not formed from a second main surface at an opposite side of the first layer from the first main surface and can be locked to a side of the first main surface while passing through the first layer; a regulation piece provided with a space between the regulation piece and the through locking piece to stop the through locking piece from passing through a surface of the plate-like member; and a column connecting the through locking piece and the regulation piece.

Effects of the Invention

According to the first to eighth aspects, the fixing member can directly pass through the first layer in the plate-like member and be locked thereto as it is. At this time, the second layer is softer than the first layer, thus the through locking piece hardly passes through the second layer. Thus, the exposure of the through locking piece can be suppressed. According to the above configuration, the wire harness can be simply fixed, in assembling the vehicle, even to a mounting object which is not suitable for having a clamp hole to fix a clamp.

When the through locking piece does not pass through the second layer, it is considered that a portion in the second layer pressed by the through locking piece is raised. Also in this case, according to the second aspect, the third layer is harder than the second layer, thus the rise in the third layer is suppressed. Accordingly, when the third layer is located on the indoor side, the rise caused by the through locking piece is hardly specified from the indoor side. Even when the through locking piece passes through the second layer, the exposure of the through locking piece can be suppressed by the third layer. In this case, it is considered, for example, that the third layer is harder than the through locking piece, thus the passing of the through locking piece which has reached the third layer is directly suppressed. It is considered, for example, that the thickness of the third layer is larger than the length dimension of the tip portion of the through locking piece exposed from the second layer, thus suppressed is that the through locking piece passes through the third layer.

It is considered, for example, when the fixing members are formed into different shapes with the same material, there is nearly a conflicting relationship between a passing performance (the degree of passing through the first layer) and a locking performance (the degree of difficulty in getting out when the fixing member is locked after passing through the first layer) of the through locking piece. Also in this case, according to the third aspect, the electrical wires are disposed in the flat state, thus when the electrical wires vibrate due to a vibration of the vehicle, amplitude of vibration can be made small. Thus, even when the locking performance of the through locking piece is low, the fixing member hardly gets out of the plate-like member. Accordingly, both the necessary passing performance and locking performance can be easily achieved.

Particularly, according to the fourth aspect, the electrical wires can be disposed in the flat state. It is also possible to press and attach the fixing member to the electrical wire fixing sheet part.

Particularly, according to the fifth aspect, when the same type of fixing members are used in a plural types of plate-like members each including the first layer with the different thickness, the difference in thickness can be absorbed by the fixing member attaching sheet part.

Particularly, according to the sixth aspect, the insertion part is inserted into the hole, thus easily maintained is a state where the through locking piece is locked to the plate-like member. The through locking piece can be made small in a state where the insertion part is located before a position in the hole where the locking state of the through locking piece can be maintained. Accordingly, the through locking piece can easily pass through the plate-like member.

DESCRIPTION OF EMBODIMENT(S)

Embodiment

A wire harness fixing structure according to an embodiment is described hereinafter.FIG. 1is a schematic exploded perspective view illustrating a wire harness fixing structure1according to the embodiment and a vehicle body80to which the wire harness fixing structure1is to be assembled.FIG. 2is a schematic plan view illustrating the wire harness fixing structure1according to the embodiment.FIG. 3is a cross-sectional view of the wire harness fixing structure1cut along a line inFIG. 2.

The wire harness fixing structure1according to the embodiment includes a plate-like member10and a wire harness20fixed to the plate-like member10.

The plate-like member10is a member interiorly mounted on a vehicle. Specifically, the plate-like member10includes a first layer12and a second layer14. Herein, the plate-like member10further includes a third layer16.

The second layer14is formed softer than the first layer12. The third layer16is formed harder than the second layer14. In comparing the first layer12and the third layer16, the first layer12or the third layer16may be harder or they may have the same hardness.

The second layer14is stacked on a first main surface12aof the first layer12. The third layer16is stacked on an opposite side of the second layer14from the first layer12. Accordingly, the first layer12, the second layer14, and the third layer16are stacked in this order. In the description hereinafter, the plate-like member10is interiorly mounted so that a surface of the plate-like member10on a side where the second layer14is located with respect to the first layer12faces an indoor side, but may be interiorly mounted so that a surface of the plate-like member10on a side where the first layer12is located with respect to the second layer14faces the indoor side.

More specifically, the plate-like member10is described as a roof lining herein. Accordingly, the plate-like member10is attached to an inner surface of a ceiling part82in the vehicle body80. However, it is also considered that the plate-like member10is a member interiorly mounted on the other part, such as a door trim, in a vehicle. At this time, the wire harness fixing structure1is preferable in a case where one surface of the plate-like member10is exposed indoors.

Known as such a roof lining is a roof lining including a foam resin layer for purpose of sound absorption or thermal insulation and a reinforcement layer provided on both surfaces of the foam resin layer to reinforce the foam resin layer. In the description hereinafter, in the plate-like member10, the second layer14is the foam resin layer described above, and each of the first layer12and the third layer16is the reinforcement layer described above. Applicable to a resin which is a material of the foam resin layer are, for example, polyurethane series resin, polypropylene series resin, and modified polyphenylene ether series resin, for example. Considered as a configuration of the reinforcement layer is that a plate material provided separately from the foam resin layer is joined to a plate material constituting the foam resin layer. Considered in this case as the plate material constituting the reinforcement layer is, for example, a resin plate material, a plate material made of glass fiber, carbon fiber, basalt fiber, natural fiber, and organic fiber, or a non-woven cloth. A so-called skin layer is also considered as the reinforcement layer. The skin layer is a hard layer formed, at a time of forming the foam resin layer, of the same resin on the surface of the foam resin layer. Types of the first layer12and the third layer16may be the same or different from each other.

When the plate-like member10is the roof lining, considered is that a surface skin layer not shown in the drawings is stacked on an opposite side of the third layer16from the second layer14. The surface skin layer is formed of a material such as a non-woven cloth, a woven cloth, or a knitted cloth, for example. A main surface of the surface skin layer at an opposite side of the surface skin layer from the third layer16is defined as an indoor side surface of the plate-like member10, and is exposed indoors. Also considered is that a film, for example, is stacked as a rear surface layer on an opposite side of the first layer12from the second layer14. The first main surface12ain the first layer12or a main surface of the rear surface layer, in the case where the rear surface layer is stacked, at an opposite side of the rear surface layer from the first layer12is defined as a vehicle body80side surface in the plate-like member10. The indoor side surface in the plate-like member10is simply referred to as the front surface and the vehicle body80side surface in the plate-like member10is referred to as the rear surface in some cases hereinafter.

A thickness of each layer in the plate-like member10is appropriately set based on a specification required for the plate-like member10. There may be a case herein that the plate-like member10partially includes a portion having a different thickness. Considered, for example, is that the plate-like member10formed into a flat plate-like shape once is heated and cold-pressed, thereby being partially bent and deformed, and is molded into a desired shape. In this case, there may be a case where a thickness of a portion bent and deformed by heating and cold-pressing is smaller than that of a portion not bent and deformed.

An opening18is formed in the plate-like member10. The opening18is a part where an electrical component such as an illumination lamp is disposed, for example. Accordingly, the wire harness20is disposed on the plate-like member10to avoid the opening18.

FIG. 4is a schematic perspective view illustrating the wire harness20according to the embodiment.

The wire harness20includes electrical wires22and a fixing member50. Herein, the wire harness20further includes an electrical wire fixing sheet part30. Herein, the wire harness20further includes a fixing member attaching sheet part40.

The electrical wires22are disposed along the plate-like member10. More specifically, the electric wires22are disposed to have an overlap with the plate-like member10in at least a part of a region along a longitudinal direction. It is considered that insulated electrical wires each including a core wire and an insulating covering for covering the core wire, for example, are used as the electrical wires22. The core wire is made of a conductive material such as copper or aluminum. The core wire may be a single wire or a twisted wire. The insulating covering may be formed by extrusion molding, for example, a resin such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP) around the core wire or by applying, for example, varnish (also referred to as an enamel coating) around the core wire and baking the varnish.

The number of the electrical wires22may be at least one. Herein, the plurality of electrical wires22are included. The plurality of electrical wires22are disposed in a flat state on the plate-like member10. In the example described in the present embodiment, the plurality of electrical wires22extend from the outside of the plate-like member10toward the plate-like member10in a bundled form. At this time, the plurality of electrical wires22are halfway branched, and each of the branched electrical wires22extends toward a plurality of parts in the plate-like member10. At this time, each branch-line part23is branched in a position close to a rim of the plate-like member10, and extends through a path as short as possible to a position of a destination member90, which is the other party of connection, while avoiding portions inappropriate for the arrangement of the electrical wires22such as the opening18. In the example illustrated inFIG. 2, all terminal parts of the branch-line parts23are connected to the destination members90on the plate-like member10, however, some of the terminal parts may pass through the plate-like member and extend to a rear side of the vehicle. The destination member90is considered an illumination member, a sensor, and an antenna, for example.

Each branch-line part23is connected to the destination member90mounted on the vehicle via a connector24provided on an end of the branch-line part23.

The electrical wire fixing sheet part30is formed into a sheet. The electrical wires22are fixed to the electrical wire fixing sheet part30. A path of the electric wires22is thereby regulated. A material constituting the electrical wire fixing sheet part30is not particularly limited. For example, in the example illustrated inFIG. 4, the electrical wires22are sewn to the electrical wire fixing sheet part30with a thread32, thereby being fixed to electrical wire fixing sheet part30. Applicable is the electrical wire fixing sheet part30to which the electrical wires22can be sewn.

Applicable as a method of sewing the electrical wires22is a sewing using a sewing machine or a sewing by hand obviously. When the electrical wires22are sewn using the sewing machine, considered is a case where a needle thread and a bobbin thread in the sewing machine are prepared separately from the electrical wires22or a case where the electrical wires22are used as one of the needle thread and the bobbin thread in the sewing machine.

However, the method of fixing the electrical wires22to the electrical wire fixing sheet part30is not limited to the sewing. For example, the electrical wires22may be fixed to the electrical wire fixing sheet part30by welding as is a case for a wire harness120illustrated inFIG. 5. Applicable in this case is the electrical wire fixing sheet part30enabling the welding of the electrical wires22. Applicable as the welding method is ultrasonic welding, laser welding, or thermal welding, for example. The electrical wires22may be fixed to the electrical wire fixing sheet part30by an adhesive agent or a pressure sensitive adhesive tape, for example. It is also applicable that the electrical wire fixing sheet part includes a two-layered sheet material and the electrical wires22are sandwiched and fixed by the two-layered sheet material.

Herein, the sheet material constituting the electrical wire fixing sheet part30is separately provided for each branch-line part23, however, there may also be a case where the plurality of branch-line parts23are fixed to one sheet material.

In the example illustrated inFIG. 2, the electrical wires22are disposed in a straight line form on the electrical wire fixing sheet part30, however, there may be a portion halfway bent and disposed. For example, the branch-line part23ais bent and disposed to avoid the opening18, and the parts on either side of the bent portion are fixed to the different sheet materials, however, the bent portion and the either side thereof may be fixed to the same one sheet material. When an extension direction of the electrical wires22along the shortest path from the branch position and a fitting direction of the connector24provided on the end of the electrical wires22and a receiving connector provided on the destination member90are different from each other, it is considered that part of the electrical wires22around part extending from the connector24located on the end of the electrical wires22is bent. In this case, also considered is that the bent portion is fixed to the electrical wire fixing sheet part30.

The electrical wire fixing sheet part30includes one sheet material covering the electrical wires22from one side. The electrical wires22are disposed on one main surface of the electrical wire fixing sheet part30and fixed thereto. The wire harness20is disposed on the plate-like member10so that the sheet material is located on the side of the plate-like member10. However, the wire harness20is disposed on the plate-like member10so that the electrical wires22are located on the side of the plate-like member10. There may be a case where the electrical wires22halfway transfer from one main surface side to the other main surface side of the electrical wire fixing sheet part30.

FIG. 6is a schematic perspective view illustrating the fixing member50according to the embodiment.

The fixing member50is attached to the electrical wires22. The fixing member50is a member for fixing the electrical wires22to the plate-like member10. Specifically, the fixing member50includes a through locking piece52, a regulation piece54, and a column56. The fixing member50is formed of a resin or metal, for example, as a material. The fixing member50is considered an integrated molded component using molds, for example.

In the through locking piece52, a tip portion52ais formed to be able to pass through the first layer12from a second main surface12bat an opposite side of the first layer12from the first main surface12a. That is to say, the through locking piece52is formed to be able to pass through the plate-like member10from the rear surface of the plate-like member10. The through locking piece52can pass through a portion in the plate-like member10where a hole is not formed. The through locking piece52is locked to the first main surface12awhile passing through the first layer12. The through locking piece52is formed into a tapered shape, for example, (a cone shape herein). The through locking piece52is formed into the tapered shape, thus mold release can be easily performed when the fixing member50is integrally molded using molds. A bottom part52bof a cone is a part connected to the column56, and is a part locked to the first main surface12awhile passing through the first layer12. A vertex of the cone is the tip portion52ain the through locking piece52.

The regulation piece54is provided with a space between the regulation piece54and the through locking piece52. The regulation piece54stops the through locking piece52from passing through the surface of the plate-like member10. For example, the regulation piece54is hooked to and locked to the second main surface12bof the first layer12or the rear surface of the plate-like member10, thereby stopping the through locking piece52from proceeding forward in a passing-through direction any more. Accordingly, any shape and size of the regulation piece54are applicable as long as the through locking piece52can be hooked to a peripheral edge of a hole formed in the first layer12and a layer closer to the rear surface than the first layer12when the through locking piece52passes through the first layer12and the layer closer to the rear surface. Herein, the regulation piece54is formed into the disk shape having the same shaft center as the through locking piece52. In this case, the regulation piece54is preferably formed equal to or larger than the through locking piece52. As illustrated inFIG. 6, an outer periphery of the main surface at an opposite side of the regulation piece54from a surface connected to the column56(referred to as the bottom surface of the regulation piece54in some cases hereinafter) preferably has a chamfered shape as rounded shape.

The column56connects the through locking piece52and the regulation piece54. Herein, the column56is formed into a column shape (a cylindrical shape herein) thinner than the bottom part52bof the through locking piece52and thinner than the regulation piece54. A shaft center of the column56coincides with the shaft center of the through locking piece52and the shaft center or the regulation piece54. At least part of the column56is located in the first layer12in a state where the fixing member50is inserted into the plate-like member10. At least part of the column56is located in the fixing member attaching sheet part40in a state where the fixing member50is attached to the fixing member attaching sheet part40.

The fixing member attaching sheet part40is formed into a sheet. The fixing member attaching sheet part40is a part to which the fixing member50is attached. The fixing member attaching sheet part40intervenes between the regulation piece54and the first layer12. For example, the fixing member attaching sheet part40is considered the same sheet material as the electrical wire fixing sheet part30. In this case, in one sheet material, a part which is not used for fixing the electrical wires22, for example, a part to which the thread32is not sewn or a part which is not welded to the covering of the electrical wires22can be used as the fixing member attaching sheet part40. In the example illustrated inFIG. 2, the fixing member attaching sheet part40is provided on a lateral side of the electrical wires22, that is to say, a position where the fixing member50is attached is a position lateral to the electrical wires22, however, this configuration is not necessary. For example, as illustrated inFIG. 7, the fixing member50may be attached between the plurality of electrical wires22which are parallelly arranged. For example, as illustrated inFIG. 8, the fixing member50may be attached below the electrical wires22. In this case, it is considered, for example, that the fixing member50is attached to a part of one sheet material, which has an overlap with the electrical wires22but the electrical wires22are not fixed to, in a state where a part of a region in the electrical wires22along the longitudinal direction is not fixed to the one sheet material.

For example, as illustrated inFIG. 9, a fixing member attaching sheet part140may be provided separately from the electrical wire fixing sheet part30and joined to the electrical wire fixing sheet part30. Considered as a joining method are welding or a pressure sensitive adhesive double sided tape, for example, as well as an adhesive agent142. In the example illustrated inFIG. 9, the fixing member attaching sheet part140is joined to a main surface30bof the electrical wire fixing sheet part30at an opposite side of the electrical wire fixing sheet part30from a main surface30awhere the electrical wires22are disposed, but may be joined to the main surface30awhere the electrical wires22are disposed In this case, the electrical wires22may be sandwiched between the fixing member attaching sheet part140and the electrical wire fixing sheet part30.

In the same manner, as illustrated inFIG. 9, the fixing members50may be provided on both lateral sides of the electrical wires22. Needless to say, the fixing members50may be provided on both lateral sides of the electrical wires22also in a case where the fixing member attaching sheet part40and the electrical wire fixing sheet part30are made up of one sheet material as illustrated inFIG. 2.

When the fixing member50is attached to the fixing member attaching sheet part40, a hole through which the fixing member50is inserted may be or may not be previously provided in the sheet material constituting the fixing member attaching sheet part40. When the hole through which the fixing member50is inserted is previously provided, the hole may pass the through locking piece52or the regulation piece54. When the hole is passed through by the through locking piece52, it is considered that the hole is formed into a circular shape smaller than the bottom part52bof the through locking piece52, for example. For example, when the hole is passed through by the regulation piece54, it is considered that the hole is formed into a slit-like shape having substantially the same length dimension as a diameter of the regulation piece54. When the hole through which the fixing member50is inserted is not previously provided, it is considered that the through locking piece52is stuck into and passes through the fixing member attaching sheet part40.

Described herein is an operation of fixing the wire harness20to the plate-like member10using the fixing member50.FIG. 10is an explanation diagram illustrating the wire harness20fixed to the plate-like member10.

Firstly, prepared as illustrated inFIG. 3is the wire harness20in which the fixing member50is fixed to the electrical wires22. Then, the wire harness20is disposed in a form corresponding to an arrangement form on the plate-like member10.

Subsequently, as illustrated inFIG. 10, the tip portion52aof the through locking piece52in the fixing member50is directed to the rear surface of the plate-like member10. At this time, a part of the plate-like member10located in front of the through locking piece52is a part where the hole is not previously formed. In this state, the bottom surface of the regulation piece54is pressed to insert the through locking piece52into the plate-like member10from the rear surface.

Then, when the regulation piece54is hooked to the rear surface of the plate-like member10via the fixing member attaching sheet part40, the further pressing is stopped. Accordingly, as illustrated inFIG. 3, the through locking piece52passes through the first layer12, and the bottom part52bof the through locking piece52is locked to the first main surface12aof the first layer12. The bottom part52bof the through locking piece52may be locked to the first main surface12aof the first layer12while involving a part of the second layer14.

Herein, when the bottom part52bof the through locking piece52is locked to the first main surface12aof the first layer12, it is considered that the through locking piece52can be hooked by an occurrence of at least one of a first hooking state and a second hooking state described below, for example.

Firstly, the first hooking state is as follows. That is to say, when the through locking piece52is inserted into the first layer12, the through locking piece52is elastically deformed in a manner that a diameter of the bottom part52bdecreases under reaction force from the first layer12. When the through locking piece52passes through the first layer12in this state, the state where the through locking piece52is elastically deformed is reduced by reason that the second layer14is softer than the first layer12. Thus, the bottom part52bof the through locking piece52extends outside the hole formed in the first layer12in accordance with the passing of the through locking piece52, thus can be hooked to the peripheral edge of the hole.

The second hooking state is as follows. That is to say, when the through locking piece52is inserted into the first layer12, the first layer12is elastically deformed to be radially spread with respect to the through locking piece52under force from the through locking piece52. The hole formed in the first layer12in accordance with the passing of the through locking piece52in this state gets smaller than the bottom part52bof the through locking piece52in accordance with the reduction in the elastic deformation of the first layer12after the passing of the through locking piece52. Thus, the bottom part52bof the through locking piece52can be hooked to the peripheral edge of the hole.

At this time, it is preferable that the through locking piece52can pass through the first layer12to such a degree that a worker can make the through locking piece52pass through the first layer12by pressing the bottom surface of the regulation piece54with a finger WS as illustrated inFIG. 10. The degree of passing of the through locking piece52through the first layer12is considered to be changed in accordance with a shape of the through locking piece52, particularly a sharpness of the tip portion52aof the through locking piece52and properties (hardness and elasticity) of materials constituting the through locking piece52and the first layer12, for example.

It is preferable that the through locking piece52locked to the first main surface12aof the first layer12can hardly get out of the first layer12to such a degree that it does not get out during use of the vehicle. The degree of difficulty that the through locking piece52locked to the first main surface12aof the first layer12gets out of the first layer12is considered to be changed in accordance with a shape of the through locking piece52, particularly a degree of extension of the bottom part52bof the through locking piece52with respect to the hole formed in the first layer12after the through locking piece52has passed through the hole and a property (hardness and elasticity) of a material constituting the through locking piece52and the first layer12, for example.

Herein, a sum of a length dimension of the column56and a height dimension of the through locking piece52is preferably equal to or smaller than a sum of a thickness dimension of the fixing member attaching sheet part40and a thickness dimension of the plate-like member10, and is more preferably equal to or smaller than a sum of the thickness dimension of the fixing member attaching sheet part40and a thickness dimension from the second layer14to the rear surface in the plate-like member10. Accordingly, it can be suppressed more reliably that the through locking piece52passes through the plate-like member10to be exposed out of the front surface. When the sum of the length dimension of the column56and the height dimension of the through locking piece52is larger than the sum of the thickness dimension of the fixing member attaching sheet part40and the thickness dimension of the plate-like member10, it is considered that the third layer16is formed so that the fixing member50cannot pass through the third layer16for purpose of suppressing the through locking piece52passing through the plate-like member10and exposed out of the front surface.

The length dimension of the column56is preferably equal to or larger than a thickness dimension from the first layer12to the rear surface in the plate-like member10, and is more preferably equal to or larger than a sum of the thickness dimension of the fixing member attaching sheet part40and the thickness dimension from the first layer12to the rear surface in the plate-like member10. Accordingly, the through locking piece52can pass through the first layer12, and the bottom part52bof the through locking piece52can be hooked to the first main surface12aof the first layer12more reliably.

There may be a case where one plate-like member10includes a portion having a different thickness as described above. Also in this case, the fixing member attaching sheet part40intervenes between the regulation piece54and the first layer12, and is compressed in some cases, thus the fixing member attaching sheet part40can absorb the difference in the thickness dimension of the plate-like member10. Accordingly, one fixing member50can suffice for the portion having the different thickness in the plate-like member10.

Subsequently, all the fixing members50are pressed into and locked to the plate-like member10, thus the wire harness20can be fixed to the plate-like member10. When the plurality of branch-line parts23are included, it is applicable that one branch-line part23is disposed and the fixing member50provided on the branch-line part23is pressed into the plate-like member10, and subsequently, the other branch-line part23is disposed. It is also applicable that the operation of pressing the fixing member50into the plate-like member10is performed after all of the branch-line parts23are disposed.

According to the above configuration, the fixing member50can directly pass through the first layer12in the plate-like member10and be locked thereto as it is. At this time, the second layer14is softer than the first layer12, thus the through locking piece52hardly passes through the second layer14. Thus, the exposure of the through locking piece52can be suppressed. According to the above configuration, the wire harness20can be simply fixed, in assembling the vehicle, even to a mounting object which is not suitable for having a clamp hole to fix a clamp. The fixing member50can be previously attached to the electrical wires22, thus the number of manufacturing processes in assembling the vehicle can be reduced also on this point.

When the through locking piece52does not pass through the second layer14, it is considered that a portion in the second layer14pressed by the through locking piece52is raised. Also in this case, the third layer16is harder than the second layer14, thus the rise in the third layer16is suppressed. Accordingly, when the third layer16is located on the indoor side, the rise caused by the through locking piece52is hardly specified from the indoor side. Even when the through locking piece52passes through the second layer14, the exposure of the through locking piece52can be suppressed by the third layer16. In this case, it is considered, for example, that the third layer16is harder than the through locking piece52, thus the passing of the through locking piece52which has reached the third layer16is directly suppressed, or the third layer16is harder than the first layer12, thus the through locking piece52cannot pass through the third layer16with the force to pass through the first layer12. It is considered, for example, that the thickness of the third layer16is larger than the length dimension of the tip portion of the through locking piece52exposed from the second layer14, thus suppressed is that the through locking piece52passes through the third layer16.

It is considered, for example, when the fixing members50are formed into different shapes with the same material, there is nearly a conflicting relationship between a passing performance (the degree of passing through the first layer12) and a locking performance (the degree of difficulty in getting out when the fixing member50is locked after passing through the first layer12) of the through locking piece52. Also in this case, the electrical wires22are disposed in the flat state, thus when the electrical wires22vibrate due to a vibration of the vehicle, amplitude of vibration can be made small. Thus, even when the locking performance of the through locking piece52is low, the fixing member50hardly gets out of the plate-like member10. Accordingly, both the necessary passing performance and locking performance can be easily achieved.

The electrical wire fixing sheet part30is provided, thus the electrical wires22can be easily disposed in the flat state. It is also possible to press and attach the fixing member50in an empty space of the sheet material constituting the electrical wire fixing sheet part30.

When the same type of fixing members50are used in a plural types of plate-like members10each including the first layer12with the different thickness, the difference in thickness can be absorbed by the fixing member attaching sheet part40.

Modification Example

In the embodiment described above, the plurality of electrical wires22are disposed in the flat state on the plate-like member10, however, this configuration is not necessary. As illustrated inFIG. 11, the electrical wires22may be bundled. In the example illustrated inFIG. 11, the electrical wires22are bundled to have a circular cross section, but may be bundled to have the other cross-sectional shape.

In the embodiment described above, the through locking piece52in the fixing member50has the tapered shape, however, this configuration is not necessary. For example, as is the case for a fixing member150illustrated inFIG. 12, a through locking piece152may be formed into a shape that an outer edge of a bottom part152bprotrudes toward the side of the regulation piece54, in other words, a shape that a cone having a height lower than a cone with the bottom part152bis removed from the side of the bottom part152b. When the through locking piece152is formed into the shape illustrated inFIG. 12, the bottom part152bcan be elastically deformed easily in a direction in which a diameter decreases. The bottom part152bcan also be elastically deformed in a direction in which the diameter increases.

FIG. 13is a schematic front view illustrating a second modification example of the fixing member50. A fixing member250according to the second modification example is different from the fixing member50in that the fixing member250can maintain a locking state of the through locking piece. Specifically, the fixing member250includes a first member251and a second member260.

The first member251includes a through locking piece252, a regulation piece254, and a column256. The through locking piece252, the regulation piece254, and the column256are formed into shapes similar to through locking piece52, the regulation piece54, and the column56described above, respectively (the column256is slightly thicker than the column56herein). In the first member251, a hole257and a through hole258are formed in the column256.

The hole257extends from an opening in a bottom surface of the regulation piece254toward the through locking piece252. Herein, the hole257has a bottom, and a position of the bottom is set to a position of the through locking piece252. However, the position of the bottom of the hole257may not reach the position of the through locking piece252. It is also applicable that the hole257passes to a tip portion of the through locking piece252, thus the hole257does not have the bottom.

The through hole258is formed to reach, from one position in a side surface of the column256, an opposite position. The hole257and the through hole258communicate with each other. It is also applicable that the through locking piece252is not formed into the cone shape but a shape extending from the column256toward both lateral sides. In this case, the through locking piece may be formed in a position sandwiching the through hole258formed in the column256.

The hole257is formed in the first member251, thus as illustrated inFIG. 14, a bottom part of the through locking piece252is elastically deformed to be small easily when the through locking piece252passes through the plate-like member10. In the similar manner, the through hole258is formed, thus as illustrated inFIG. 14, the bottom part of the through locking piece252is elastically deformed to be small easily when the through locking piece252passes through the plate-like member10. The through hole258is formed, thus molds can be easily released when the first member251is molded using the molds at a time of forming a concave portion268described hereinafter in the hole257.

The second member260includes an insertion part262insertable into the hole257and an insertion regulation piece264preventing an excess insertion of the insertion part262into the hole257.

The insertion part262is formed into a rod-like shape. The insertion part262is inserted into the hole257, thus it can be suppressed that the through locking piece252in the locking state is elastically deformed to be small. Accordingly, the hole257and the insertion part262function as a maintaining part maintaining the locking state of the through locking piece252.

It is preferable that the first member251and the second member260can be locked to each other in a state where an insertion depth of the insertion part262inserted into the hole257is equal to a first depth. The first depth is a depth that the locking state of the through locking piece252locked to the plate-like member10can be maintained, and is a depth that the insertion part262reaches a back of the hole257.

Furthermore, it is more preferable that the first member251and the second member260can be locked to each other in a state where the insertion depth of the insertion part262inserted into the hole257is equal to a second depth. The second depth is set smaller than the first depth. The second depth is a depth that the insertion part262inserted into the hole257hardly prevent the elastic deformation of the through locking piece252when the first member251passes through the plate-like member10. For example, it is considered that a wire harness220has a configuration that the first member251in the fixing member250is attached to the fixing member attaching sheet part40and the second member260is locked to the first member251in a position of the second depth. In this case, the wire harness220is transported to a vehicle assembly plant, and after the through locking piece252passes through the plate-like member10and is locked thereto, the second member260is further inserted into the first member251. Then, the second member260is locked to the first member251in a position of the first depth, thereby constituting a wire harness fixing structure201.

As the configuration that the first member251and the second member260can be locked in the state where the insertion depth of the insertion part262inserted into the hole257is the first depth and the second depth, it is considered that a protrusion267is formed on one of an inner peripheral surface of the hole257and an outer peripheral surface of the insertion part262and the concave portion268to which the protrusion267is locked is formed in the other one of them. Herein, the concave portion268is formed in the inner peripheral surface of the hole257. The protrusion267is formed on the outer peripheral surface of the insertion part262. Herein, two concave portions268aand268bare formed with a space therebetween along a depth direction of the hole257. A state where the protrusion267is locked to the concave portion268aformed in a position close to the back of the hole257is a state where the insertion depth of the insertion part262inserted into the hole257is the first depth. A state where the protrusion267is locked to the concave portion268bformed in a position close to an entrance of the hole257is a state where the insertion depth of the insertion part262inserted into the hole257is the second depth.

At this time, in the protrusion267and the concave portion268, locking force acting backward in the insertion direction of the second member260with respect to the first member251is larger than locking force acting forward in the insertion direction. That is to say, the protrusion267and the concave portion268have further effect of preventing the second member269from getting out of the first member251. Herein, the insertion regulation piece264makes up for the regulation on the second member260moving forward in the insertion direction with respect to the first member251at the first depth.

The insertion regulation piece264is formed into a flat plate-like shape (circular plate-like shape herein) in the manner similar to the regulation piece254, for example. The insertion regulation piece264is formed smaller than the regulation piece254herein, but may be formed equal to or larger than the regulation piece254. The insertion regulation piece264can be hooked into a peripheral edge of the hole257in the state where the insertion part262is inserted into the hole257at the first depth. Accordingly, suppressed is the further insertion of the insertion part262into the hole257.

Herein, the shape of the inner peripheral surface of the hole257and the shape of the outer peripheral surface of the insertion part262are not particularly limited, thus a circular shape or a rectangular shape may also be applicable. The shape of the inner peripheral surface of the hole257and the shape of the outer peripheral surface of the insertion part262may be the same or different from each other.

The insertion part262may be formed equal to or larger than the hole257. When the insertion part262is formed larger than the hole257, also applicable is the configuration that the through locking piece252is spread by the insertion of the insertion part262. The insertion part262may be formed smaller than the hole257as long as the insertion part262can maintain the locking state of the through locking piece252.

Also considered is that the insertion part262and the hole257are formed so that a relative size thereof differs along a longitudinal direction. It is considered in this case that, for example, the insertion part is formed equal to or smaller than the hole in a corresponding part of the insertion part and the hole between a position where the insertion part is firstly inserted into the hole and the position of the second depth, and the insertion part is formed larger than the hole in a part corresponding to a part between the second depth and the first depth. In this case, the insertion part is equal to or smaller than the hole until the insertion part reaches the position of the second depth, thus insertion force can be reduced. The insertion part is larger than the hole between the position of the second depth and the position of the first depth, thus the insertion force can be increased, and an erroneous insertion of the insertion part before being locked to the plate-like member10can be suppressed. A part of the insertion part larger than the hole enables the extension of the through locking piece252after the insertion part is locked to the plate-like member10.

The electrical wires22is preferably fixed to the plate-like member10using the fixing member250described above in the following manner.

That is to say, the first member251in the fixing member250is attached to the fixing member attaching sheet part40. Then, the wire harness220in which the first member251is attached to the fixing member attaching sheet part40is transported to a vehicle assembly plant. At this time, the second member260is preferably transported in a state of being locked to the first member251in the position of the second depth as described above. However, the second member260may be transported in a state of not being locked to the first member251, that is to say, transported separately from the first member251.

Next, in the vehicle assembly plant, the first member251in the wire harness220passes through the plate-like member10in a state where the wire harness220is disposed along the plate-like member10. At this time, as described above, the hole257and the through hole258are formed, thus the through locking piece252is elastically deformed to be small easily. Thus, the first member251can pass through the plate-like member10easily.

After the first member251passes through the plate-like member10, the second member260is further inserted into the first member251and locked in the position of the first depth. According to the above configuration, as illustrated inFIG. 15, the fixing member250passes through the plate-like member10and is locked thereto, and furthermore, the locking state is maintained.

The configurations described in the embodiments and modification examples thereof can be appropriately combined as long as they are not contradictory.

Although the present invention is described in detail, the foregoing description is in all aspects illustrative and does not restrict the invention. It is therefore understood that numerous modifications and variations can be devised without departing from the scope of the invention.

EXPLANATION OF REFERENCE SIGNS