Patent Publication Number: US-2023138937-A1

Title: Wire harness exterior body, and wire harness with exterior body

Description:
TECHNICAL FIELD 
     The present invention relates to a wire harness sheath and a sheathed wire harness. 
     BACKGROUND ART 
     A wire harness is adapted to be laid in a vehicle or the like, and is formed by combining a bundle of a plurality of wires for power supply and signal communication with connectors and terminals. In order to ensure that these connectors and terminals are positioned at appropriate locations in a vehicle or the like, it is necessary to properly regulate a path for the wire harness. 
     Conventionally, a path for a wire harness is regulated by bundling the wires together with a resin rod made of polypropylene or other material, or by passing the wire harness through a hollow space inside a corrugated tube produced by extrusion molding or a cylindrical protector produced by injection molding (see, for example, Patent Document 1).
     Patent Document 1: Japanese Unexamined Patent Application, Publication No. 2019-13106   

     DISCLOSURE OF THE INVENTION 
     Problems to be Solved by the Invention 
     However, in the case in which a resin rod and wires are bundled together as described above, it is difficult to deform the resin rod into a shape fittable to a path having a complicated shape such as curved shape, and further, the cross-sectional area of the wire harness increases by the volume of the resin rod. For these reasons, such a wire harness with a resin rod is not suitable for application to a path in a narrow space, and may make it impossible to sufficiently regulate the path for the wire harness. In the case of the corrugated tube and the protector, which have a constant cross-sectional area, dead space tends to be created therein when its three-dimensional shape, such as a cylindrical shape, is flattened, thereby making it difficult to save space in a vehicle or the like in which a wire harness with the corrugated tube or the protector is laid. 
     The present invention has been achieved in view of the above circumstances, and it is an object of the present invention to provide a wire harness sheath and a sheathed wire harness that make it possible to suitably regulate a path for the wire harness and to reduce dead space so as to save space in a vehicle or the like in which the wire harness is laid. 
     Means for Solving the Problems 
     The present inventors have conducted studies to attain the above-described object. As a result of the studies, the present inventors have achieved the present invention based on the following findings: suitable regulation of a path for a wire harness, reduction of dead space, and space saving in a vehicle or the like in which the wire harness is laid can be achieved by a wire harness sheath for a wire harness having a wire bundle as a bundle of a plurality of wires, the wire harness sheath including at least one flat plate member made of a resin material and forming the wire harness sheath, and having a planar portion that is adapted to be in contact with and support one surface of the wire bundle forming part of the wire harness or one surface of a wire assembly including divisional wire bundles branching off and extending from the wire bundle, and thereby regulates a path for the wire harness. More specifically, the present invention provides the following. 
     (1) A wire harness sheath for a wire harness having a wire bundle as a bundle of a plurality of wires, the wire harness sheath including: 
     at least one flat plate member made of a resin material and forming the wire harness sheath,
 
the wire harness sheath having a planar portion that is adapted to be in contact with and support one surface of the wire bundle forming part of the wire harness or one surface of a wire assembly including divisional wire bundles branching off and extending from the wire bundle, and thereby regulates a path for the wire harness.
 
(2) The wire harness sheath according to (1) above, wherein the resin material is a foamed resin.
 
(3) The wire harness sheath according to (1) or (2) above, wherein the planar portion is formed of one flat plate member.
 
(4) The wire harness sheath according to (1) or (2) above, wherein the planar portion is formed of a plurality of flat plate members coupled to each other.
 
(5) The wire harness sheath according to any one of (1) to (4) above, wherein the planar portion has width dimension conforming to changes in a cross-sectional shape of the wire assembly in a longitudinal direction.
 
(6) The wire harness sheath according to any one of (1) to (5) above, the wire harness sheath being bendable in a thickness direction of the planar portion.
 
(7) The wire harness sheath according to any one of (1) to (6) above, the wire harness sheath having a surface positioned to hold the wire assembly between the surface and an installation surface on which the wire assembly is laid, thereby protecting the wire assembly.
 
(8) A sheathed wire harness including:
 
a wire harness; and
 
the wire harness sheath according to any one of (1) to (7) above, wherein
 
the wire harness sheath includes at least one flat plate member made of a resin material and forming the wire harness sheath, and
 
the wire harness sheath has a planar portion that is in contact with and supports one surface of the wire bundle forming part of the wire harness or one surface of a wire assembly including divisional wire bundles branching off and extending from the wire bundle, and thereby regulates a path for the wire harness.
 
     Effects of the Invention 
     The present invention makes it possible to suitably regulate a path for a wire harness, and enables reduction of dead space to achieve space saving in a vehicle or the like in which the wire harness is laid. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS.  1 A and  1 B  illustrate a wire harness sheath according to an embodiment of the present invention in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly of a wire harness, wherein  FIG.  1 A  is a schematic planar view of the wire harness sheath seen in a direction in which its surface, which is in contact with and supports the one surface of the wire assembly, faces the viewer, and  FIG.  1 B  is a schematic planar view of the wire harness sheath seen in a direction in which a surface opposite to the surface, which is in contact with and supports the one surface of the wire assembly, faces the viewer; 
         FIGS.  2 A,  2 B and  2 C  illustrate a wire harness sheath according to an embodiment of the present invention in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly of a wire harness, wherein  FIG.  2 A  is a perspective view,  FIG.  2 B  is a cross-sectional view taken along line A-A in  FIG.  2 A , and  FIG.  2 C  is a cross-sectional view taken along line B-B in  FIG.  2 A ; 
         FIG.  3 A  is a perspective view illustrating a wire harness sheath formed of one flat plate member, and  FIG.  3 B  is a perspective view illustrating a wire harness sheath formed of a trapezoidal flat plate member and a rectangular flat plate member, which are originally separate from each other, are coupled to each other to form the wire harness sheath; 
         FIG.  4 A  is a schematic planar view of a wire harness sheath according to another embodiment of the present invention, and  FIG.  4 B  is a schematic planar view of a wire harness in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly; 
         FIG.  5 A  is a schematic planar view of a wire harness sheath according to another embodiment of the present invention, and  FIG.  5 B  is a schematic planar view of a wire harness in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly; 
         FIG.  6 A  is a schematic planar view of a wire harness sheath according to another embodiment of the present invention, and  FIG.  6 B  is a schematic planar view of a wire harness in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly; 
         FIG.  7 A  is a schematic planar view of a wire harness sheath according to another embodiment of the present invention, and  FIG.  7 B  is a schematic planar view of a wire harness in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly; 
         FIG.  8 A  is a schematic planar view of a wire harness sheath according to another embodiment of the present invention, and  FIG.  8 B  is a schematic planar view of a wire harness in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly; 
         FIG.  9 A  is a schematic planar view of a wire harness sheath according to another embodiment of the present invention, and  FIG.  9 B  is a schematic planar view of a wire harness in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly; 
         FIG.  10    is a schematic perspective view of a wire harness sheath according to another embodiment of the present invention; 
         FIG.  11    is a schematic perspective view of a wire harness sheath according to another embodiment of the present invention; 
         FIG.  12    is a schematic perspective view of a wire harness sheath according to another embodiment of the present invention; 
         FIG.  13 A  is a schematic perspective view of a wire harness sheath according to another embodiment of the present invention, and  FIG.  13 B  is a schematic perspective view of a wire harness in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly; 
         FIG.  14 A  is a schematic perspective view of a wire harness sheath according to another embodiment of the present invention, and  FIG.  14 B  is a schematic perspective view of a wire harness in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly; 
         FIG.  15    is a schematic perspective view of an installation example in which a sheathed wire harness according to an embodiment of the present invention is laid on an installation surface; 
         FIG.  16    is a schematic perspective view of a sheathed wire harness according to an embodiment of the present invention; and 
         FIG.  17    is a perspective view for explaining a method of regulating a path for a wire bundle B 8  of a wire harness by way of a combination of wire harness sheaths according to two or more embodiments of the present invention. 
     
    
    
     PREFERRED MODE FOR CARRYING OUT THE INVENTION 
     Preferred embodiments of the present invention will be descried in detail. Note that the present invention is not limited to the following embodiments. 
     1 Wire Harness Sheath 
     A wire harness sheath of the present invention is a sheath for a wire harness including a wire bundle as a bundle of a plurality of wires. The wire harness sheath is formed of at least one flat plate member made of a resin material, and has a planar portion that is adapted to be in contact with and support one surface of the wire bundle forming part of the wire harness or one surface of a wire assembly including a plurality of divisional wire bundles branching off and extending from the wire bundle, and thereby regulates a path for the wire harness. 
     A specific description will be provided below, with reference to the drawings.  FIGS.  1 A and  1 B  illustrate a wire harness sheath according to an embodiment of the present invention in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly of a wire harness.  FIG.  1 A  is a schematic planar view of the wire harness sheath seen in a direction in which its surface, which is in contact with and supports the one surface of the wire assembly, faces the viewer, and  FIG.  1 B  is a schematic planar view of the wire harness sheath seen in a direction in which a surface opposite to the surface, which is in contact with and supports the one surface of the wire assembly, faces the viewer. The wire harness sheath  1  is a sheath for a wire harness including a wire bundle B 1  as a bundle of a plurality of wires L 1 , L 2 , L 3 , L 4 , L 5 , and L 6 . Here, the wire harness sheath  1  is formed of at least one flat plate member made of a resin material, and has a planar portion  11  that is adapted to be in contact with and support one surface of a wire assembly including the wire bundle B 1  forming part of the wire harness, and thereby regulates a path for the wire harness. For the sake of convenience, the example illustrated in  FIGS.  1 A and  1 B  includes the six wire harnesses arranged on the wire harness sheath  1 . However, usually, more wire harnesses are gathered into a bundle and densely arranged. 
     For the wire harness sheath  1  having the configuration described above, since a planar portion of the wire harness sheath  1  is in contact with and supports one surface of the wire assembly, the path for the wire harness is regulated firmly. Furthermore, since the wire harness sheath  1  is formed of a two-dimensional flat plate member, dead space is less likely to be created when the wire harness sheath  1  is flattened, in comparison with, for example, a corrugated tube with a three-dimensional structure and a protector with a cylindrical shape. Therefore, using the wire harness sheath  1  to lay a wire harness in a vehicle or the like makes it possible to save space, thereby contributing to, for example, downsizing the vehicle or increasing the space inside the vehicle. 
     The resin material forming the wire harness sheath  1  is not limited to any material, as long as it is plastically deformable and shape-fixable by melting or dissolving and solidifying. The resin material may be composed of either a thermoplastic resin or a thermosetting resin. Specifically, the resin material may be one or more selected from, for example, polyethylene, polypropylene, polyvinyl chloride, polystyrene, AS resin, ABS resin, polyethylene terephthalate, methacrylate resin, polyvinyl alcohol, vinylidene chloride resin, polycarbonate, polyamide, polyimide, acetal resin, polybutylene terephthalate, fluorocarbon resin, phenol resin, melamine resin, urea resin, polyurethane, epoxy resin, and unsaturated polyester resin. From the viewpoint of weight reduction, the resin material is preferably a foamed resin. 
     The resin material forming the wire harness sheath  1  is not limited to the foamed resin, but is preferably a lightweight resin. From this viewpoint, although the resin material may have any density, the density is preferably 1000 kg/m 3  or lower, more preferably 700 kg/m 3  or lower, and further more preferably 500 kg/m 3  or lower. The density of the resin material may be 200 kg/m 3  or higher. 
     In the case where a foamed resin is used as the resin material, a foamed resin sheet may be punched into a piece having a shape suitable for being in contact with and supporting one surface of a wire assembly of a wire harness, and then, the punched piece is used as the wire harness sheath  1 . In the case where the wire harness sheath  1  is produced by the punching process, it is possible to employ, for example, inexpensive Thomson dies, and flat plate members of various shapes can be manufactured inexpensively by using a wide variety shape of dies. 
     The resin material may optionally be coated with a coating containing one or more of various additives that are added to ordinary resin materials, according to applications. The additive may be one or more selected from a filler, an antioxidant, a stabilizer, a metal deactivator, a UV absorber, a light stabilizer, a plasticizer, a colorant, a flame retardant, a nucleating agent, a compatibilizer, a transparency agent, an antistatic agent, a lubricant, etc., but is not limited to the foregoing. 
     The thickness of the wire harness sheath  1  is not particularly limited, but is preferably 0.5 mm to 5.0 mm, and more preferably 0.5 mm to 3.0 mm, for example. 
     The method of making the wire harness sheath  1  be in contact with and support one surface of a wire assembly is not particularly limited. For example, the wire harness sheath  1  and the wire assembly can be fastened together by tapes T 1  to T 3  wound therearound. Alternatively, a tie or an adhesive may be used to make the wire harness sheath  1  be in contact with and support one surface of a wire assembly. 
     The wire harness sheath  1  is preferably configured to be bendable in a thickness direction of the planar portion  11  (a direction perpendicular to the surface of the page of  FIG.  1 A  or  FIG.  1 B ). Configuring the wire harness sheath  1  to be bendable makes it possible for the wire harness to flexibly correspond to a complicated wiring path in a vehicle, and thus, the provided wire harness has excellent workability such as processability and installability (e.g., fastening with tapes). 
       FIGS.  2 A,  2 B and  2 C  illustrate a wire harness sheath according to an embodiment of the present invention in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly of a wire harness.  FIG.  2 A  is a perspective view of the wire harness sheath.  FIG.  2 B  is a cross-sectional view taken along line A-A.  FIG.  2 C  is a cross-sectional view taken along line B-B. The wire harness sheath  2  is for a wire harness that includes a divisional wire bundle B 2  as a bundle of a plurality of wires L 7  and L 8 , a divisional wire bundle B 3  as a bundle of a plurality of wires L 9  and L 10 , and a divisional wire bundle B 4  as a bundle of a plurality of wires L 11  and L 12 . The wire harness sheath  2  is formed of at least one flat plate member made of a resin material, and has a planar portion  21  that is adapted to be in contact with and support one surface of a wire assembly including the plurality of divisional wire bundles B 2 , B 3 , and B 4  branching off and extending from a wire bundle as a bundle of the plurality of wires L 7  to L 12 , and thereby regulates a path for the wire harness. In the non-limiting example illustrated in  FIGS.  2 A,  2 B and  2 C , six wires are arranged on the wire harness sheath  2 , but the number of wires is not limited to six. In the non-limiting example illustrated in  FIGS.  2 A,  2 B and  2 C , the wires are divided into the divisional wire bundles B 2 , B 3 , and B 4 , but the wires may be arranged side by side at regular intervals in a plane direction. 
     Preferably, the planar portion  21  of the wire harness sheath  2  has a width dimension conforming to changes in the cross-sectional shape of the wire assembly in the longitudinal direction. For example, the six wires L 7  to L 12  on the wire harness sheath  2  are gathered in a right portion of the page, but branch off into the divisional wire bundles B 2 , B 3 , and B 4  in a left portion of the page. As the divisional wire bundles B 2 , B 3 , and B 4  separate from one other after branching off in this manner, the cross-sectional shape of the wire assembly increases in width in the longitudinal direction. Thus, it is more preferable to vary and increase the width dimension of the planar portion  21  of the wire harness sheath  2  in conformity with the cross-sectional shape of the wire assembly. This configuration makes it easier to regulate and guide the wire bundles B 2 , B 3 , and B 4  in the respective branching directions. The cross-sectional shape of the wire assembly in the longitudinal direction can be defined as the shape of a cross section orthogonal to the direction in which the wire assembly extends. 
     The planar portion  21  of the wire harness sheath  2  may be formed of one flat plate member. On the other hand, the planar portion  21  of the wire harness sheath  2  may be formed of a plurality of flat plate members coupled to each other. Here, reference is made to  FIG.  3 A , which is a perspective view illustrating a wire harness sheath  2   a  formed of one flat plate.  FIG.  3 B  is a perspective view illustrating a wire harness sheath  2   b  formed of a plurality of flat plate members coupled to each other, namely, a trapezoidal flat plate member and a rectangular flat plate member coupled to each other. In the wire harness sheath  2   b  illustrated in  FIG.  3 B , the plurality of flat plate members are bonded to each other to form planar portions  21   b  and  22   b  of one wire harness sheath  2   b.    
     As illustrated in  FIG.  3 B  as an example, according to the embodiment of the present invention, flat plates of various basic shapes, such as a trapezoidal flat plate, a rectangular flat plate, a flat plate of a special shape other than the rectangular shape, and a polygonal flat plate with an angle larger than 180°, can be prepared as preformed parts to be used as flat plate members, and two or more of such flat plate members can be combined as appropriate to form a wire harness sheath. By preparing the materials as preformed parts in this way, sufficient wire harness sheaths of various shapes can be produced in accordance with the intended use, and the yield rate can be improved when punching or other similar process is performed. In addition, because wire harness sheaths of various shapes can be produced by combining such relatively simple shapes, it is no longer necessary to provide various types of punching dies (Thomson dies). 
     On the other hand, from the viewpoint of the above-mentioned bendability, it is preferable to form the wire harness sheath from one flat plate member, as in the case of the wire harness sheath  2   a  illustrated in  FIG.  3 A . 
     The shape of the wire harness sheath can be designed as appropriate according to the branching directions of wire bundles or the space in which the wire bundles are laid. In the following, modifications of the wire harness sheath of the present invention will be specifically described. 
     In each of  FIGS.  4  to  9   ,  FIGS.  4 A to  9 A  are schematic planar views of a wire harness sheath according to other embodiments of the present invention, and  FIGS.  4 B to  9 B  are schematic planar views of a wire harness in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly. The wire harness sheaths illustrated in  FIGS.  4  to  9    all have a flat plate shape. 
     The wire harness sheath  3   a  illustrated in  FIGS.  4 A and  4 B  is formed of one flat plate member and has a T-shaped planar portion  31   a . A wire bundle B 5   a  extends from a bottom portion of the page and branches in two directions, namely a horizontal right direction and a horizontal left direction. 
     The wire harness sheath  3   b  illustrated in  FIGS.  5 A and  5 B  is formed of one flat plate member and has a Y-shaped planar portion  31   b . A wire bundle B 5   b  extends from a bottom portion of the page and branches in two directions, namely an upper right direction and an upper left direction. 
     The wire harness sheath  3   c  illustrated in  FIGS.  6 A and  6 B  is formed of one flat plate member and has an X-shaped planar portion  31   c . Wire bundles B 5   c  extend from a lower right portion and a lower left portion of the page, respectively, and each branch in two directions, namely, an upper right direction and an upper left direction. 
     The wire harness sheath  3   d  illustrated in  FIGS.  7 A and  7 B  is formed of one flat plate member and has a cruciform planar portion  31   d . Wire bundles B 5   d  extend from right and left portions of the page, respectively, and each branch in two directions, namely, an upward direction and a downward direction. 
     The wire harness sheath  3   e  illustrated in  FIGS.  8 A and  8 B  is formed of one flat plate member and has a K-shaped planar portion  31   e . Wire bundles B 5   e  extend from upper and lower portions of the page, respectively, and each branch in two directions, namely, an upper right direction and a lower right direction. 
     The wire harness sheath  3   f  illustrated in  FIGS.  9 A and  9 B  is formed of one flat plate member and has a planar portion  31   f  extending from a bottom portion of the page and branching in three directions, namely, an upper left direction, an upward (vertical) direction, and an upper right direction. A wire bundle B 5   f  is arranged along the planar portion whereby it extends from the bottom portion of the page and branches in three directions, namely, the upper left direction, the upward (vertical) direction, and the upper right direction. 
     The wire harness sheath  3   f  illustrated in  FIGS.  9 A and  9 B  can be used to divide one wire bundle into two or more divisional wire bundles (three divisional bundles in the figures) or to bundle two or more divisional wire bundles into one bundle, just like the wire harness sheath  3  illustrated in  FIGS.  2 A,  2 B and  2 C . In a case where a wire bundle branches in the same manner, the wire harness sheath  3   f  illustrated in  FIGS.  9 A and  9 B  regulates the branching directions more specifically than the wire harness sheath  3  illustrated in  FIGS.  2 A,  2 B and  2 C , because the wire harness sheath  3   f  allows the wire bundles to extend along the branches of the wire harness sheath  3   f  and enables each of the wire bundles to be fastened to an associated one of the branches with tapes, for example. On the other hand, the wire harness sheath  3  illustrated in  FIGS.  2 A,  2 B and  2 C  is more effective in preventing external shocks, etc. because the wire harness sheath  3  has a larger area, and accordingly, the possibility that the wire bundles to be subjected to external shocks, etc. is reduced. 
     As mentioned above, the wire harness sheath may be formed by combining two or more members, which have been prepared as the preformed parts. In the following, such examples will be described by referring to the drawings. 
     For example,  FIGS.  10  to  12    are each a schematic perspective view of a wire harness sheath according to another embodiment of the present invention. 
     The wire harness sheath  3   g  illustrated in  FIG.  10    is formed of two rectangular flat plate members  31   g  and  32   g  and has a cruciform planar portion that is similar to the planar portion  31   d  of the wire harness sheath  3   d  illustrated in  FIGS.  7 A and  7 B . 
     The wire harness sheath  3   h  illustrated in  FIG.  11    is formed of three rectangular flat plate members  31   h ,  32   h , and  33   h  and has a planar portion that is similar to the planar portion  31   f  of the wire harness sheath  3   f  illustrated in  FIGS.  9 A and  9 B . 
     The wire harness sheath  3   i  illustrated in  FIG.  12    is formed of one rectangular flat plate member  31   i  and trapezoidal flat plate members  32   i  and  33   i.    
     All the wire harness sheaths described above per se have a flat plate shape. In order to regulate the path of the wire harness and to significantly enhance space saving and bendability, the wire harness sheaths preferably have a flat plate shape. 
     However, the wire harness sheaths are not limited to such a flat plate shape. In each of  FIGS.  13  and  14   , (a) is a schematic perspective view of a wire harness sheath according to another embodiment of the present invention, and (b) is a schematic perspective view of a wire harness in a state in which the wire harness sheath is in contact with and supports one surface of a wire assembly. 
     For example, as illustrated in  FIGS.  13 A and  13 B , it is conceivable to form a wire harness sheath  4  from two rectangular flat plate members  4 A and  4 B that are orthogonally joined at their respective long edges. 
     As illustrated in  FIGS.  14 A and  14 B , it is conceivable to form a wire harness sheath  5  from one rectangular flat plate member  5 A and elongated rectangular flat plate members  5 B and  5 C that are orthogonally joined to two edges of the flat plate member  5 A. 
     These non-flat sheaths are effective, for example, in preventing contact with other objects from two or more directions. 
     2 Sheathed Wire Harness 
     A sheathed wire harness according to the present embodiment includes a wire harness and the wire harness sheath described above. The wire harness sheath is formed of at least one plate shape material made of a resin material, and has a planar portion that is in contact with and supports one surface of a wire bundle forming part of the wire harness or one surface of a wire assembly including a plurality of divisional wire bundles branching off and extending from the wire bundle, and thereby regulates a path for the wire harness. 
     The wire harness sheath may have a surface positioned to hold a wire assembly between the surface and an installation surface on which the wire assembly is laid, and thereby protect the wire assembly. 
       FIG.  15    is a schematic perspective view of an installation example in which a sheathed wire harness according to an embodiment of the present invention is laid on an installation surface. The wire harness sheath  6  illustrated in  FIG.  15    has a surface positioned to hold a wire assembly B 6  between the surface and an installation surface  71  on which the wire assembly B 6  is laid, and thereby protects the wire assembly B 6 . Here, the installation surface  71  on which the wire assembly B 6  is laid may be, for example, an inside wall of a vehicle. 
     The wire assembly of the wire harness may be held between two (unjoined) sheaths.  FIG.  16    is a schematic perspective view of a sheathed wire harness according to an embodiment of the present invention. The sheathed wire harness  20  illustrated in  FIG.  16    includes a wire bundle B 7  held between two wire harness sheaths  8  and  9  arranged parallel to each other and having respective planar portions  81  and  91  facing each other. In this case, one surface of the wire bundle B 7  only has to be in contact with and supported by either one of the planar portions  81  and  91 , and may be in contact with and supported by both the planar portions  81  and  91 . 
     A technique for arranging a wire assembly of a wire harness is constituted by making a planar portion of a wire harness sheath be in contact with and support one surface of the wire assembly. Specific examples of the technique are illustrated in  FIGS.  1  to  11   . 
     In an actual vehicle, a wire assembly of a wire harness is arranged three-dimensionally in respective directions. The wire harness sheath may be a combination of two or more of the embodiments described above so as to regulate a path for the wire harness into a desired shape.  FIG.  17    is a perspective view for explaining a method of regulating a path for a wire bundle B 8  of a wire harness by way of a combination of wire harness sheaths according to two or more of the embodiments of the present invention. In the embodiment illustrated in  FIG.  17   , the wire bundle B 8  is divided into three parts by means of the wire harness sheath  2 , and the divisional three parts of the wire bundle  8 B are arranged, on a one-to-one basis, in three wire harness sheaths  4  aligned in the vertical direction of the page. 
     EXPLANATION OF REFERENCE NUMERALS 
     
         
           1 ,  2 ,  2   a ,  2   b ,  3   a ,  3   b ,  3   c ,  3   d ,  3   e ,  3   f ,  4 ,  5 ,  6 ,  8 ,  9 : Wire harness sheath 
           7 : Wall surface 
           10 ,  20 : Sheathed wire harness 
           21 ,  31   a ,  31   b ,  31   c ,  31   d ,  31   e ,  31   f ,  81 ,  91 : Planar portion 
           31   g ,  32   g ,  31   h ,  32   h ,  33   h ,  4   a ,  4   b ,  6   a ,  6   b ,  6   c : Flat plate member 
         B 1 , B 5   a , B 5   b , B 5   c , B 5   d , Bye, B 6 , B 7 , B 8 : Wire bundle 
         B 2 , B 3 , B 4 : Divisional wire bundle 
         L 1  to L 12 : Wire 
         T 1  to T 6 : Tape