JP2017084641A - Wire harness and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness not generating excessive taping and unevenness in dimensional measurement, and excellent in an assembly operation in the case of having a plurality of branch portions, and a method for manufacturing the same.SOLUTION: In a wire harness W, a branch part binding sheet 41 having a trunk line part Wt and a plurality of adhesive branch side sheet parts 45 wound around branch line parts b1 and b2 is mounted on a branch part Wb of a wire bundle Wa. The branch part binding sheet 41 is formed of a main sheet part 44 in a first radius R1 from a portion where a center hole 43 corresponding to a flexure inside center location Po of wires in the branch part Wb, and a plurality of branch side sheet parts 45 connected thereby. The plurality of branch side sheet parts 45 have a base end part 45a extending in the outside direction of radiation from the main sheet part 44, and a widened part 45b widened in the circumferential direction of the main sheet part 44 to the base end part 45a on a second radius side larger than the first radius R1, and the main sheet part 44 is positioned on one surface side of the branch part Wb.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a wire harness and a method for manufacturing the same, and more particularly to a wire harness for fixing a main wire portion and a group of wires at a branch portion with a branch fixing tape at a branch portion of an electric wire bundle and a method for manufacturing the same.

  2. Description of the Related Art For manufacturing a wire harness mounted on an automobile or the like, an assembly apparatus has been used in which a plurality of assembly jigs are erected along a wiring pattern on a drawing board. A fork-shaped jig having a U-shaped portion or the like at the upper end of the support shaft is frequently used at a branch position where a plurality of wires constituting the wire harness are branched from the trunk portion to the branch portion of the wire bundle. Has been.

  As this kind of assembling apparatus and jig, for example, as shown in FIG. 8, a plurality of base members 2 arranged on the drawing board 1 along the routing route and fixed to the drawing board 1, and the base member 2, respectively. Is known to have a column member 3 projecting on the drawing board 1 and a wire receiving member 4 supported at a predetermined height position on the drawing board 1 by the column member 3 (for example, Patent Document 1, 2).

  Also known is a wire harness in which a trunk portion and a branch portion of a branch portion of an electric wire bundle are bound by an adhesive branch portion binding sheet in which a plurality of folded surface portions are formed by a plurality of slit-like cuts in different directions. (For example, refer to Patent Documents 3 and 4).

JP 7-105758 A JP 2000-164054 A Japanese Patent Laid-Open No. 9-117034 JP-A-8-163742

  However, in the conventional wire harness using the branching unit binding sheet and the manufacturing method thereof, not only the number of branch wires and the bundle diameter are different for each branching location even in the same wire harness, but depending on the specifications of the wire harness. Since the difference in the branch shape and size at each branch point is further enlarged, when a single branch portion binding sheet is used, excessive tape winding may occur in the branch portion.

  On the other hand, it is conceivable to use a plurality of types of branch unit binding sheets or to use a plurality of types of branching jigs, but the workability of the assembly work of the wire harness is reduced.

  Furthermore, if the branch shape of the wire bundle of the wire harness becomes complicated, it will be difficult to specify the center position (branch point) of the branch, resulting in variations in the dimension measurement of the wire harness with respect to the required specifications, and accurate dimension measurement becomes difficult. There was a case.

  The present invention has been made in order to solve such a conventional problem, and while using the same branching unit binding sheet, excessive tape winding or dimensional measurement does not occur, and An object of the present invention is to provide a wire harness with good workability in assembly work even when it has a plurality of branch points, and a method for manufacturing the same.

  In order to achieve the above object, the wire harness according to the present invention has a branch part in which an electric wire bundle including a plurality of electric wires branches from a main line part to at least one branch line part, and the branch part of the electric wire bundle includes the branch part. A wire harness to which a branch unit binding sheet having a plurality of adhesive branch side sheet units that wrap around each of a main line unit and the branch unit is mounted, wherein the branch unit binding sheet is the branch of the wire bundle A central hole corresponding to the center position of the inner side of the electric wire bent at the portion is formed, and a main sheet portion having a substantially circular shape with a first radius from the center of the central hole is connected to each other by the main sheet portion. A plurality of branch side sheet portions, the plurality of branch side sheet portions extending from the main sheet portion in a radially outward direction at equal angular intervals, and a center of the center hole. Each widened portion widened in the circumferential direction of the main sheet portion with respect to the base end portion on the second radius side that is larger than the first radius, and the main portion of the branch portion binding sheet The sheet part is located on one side of the branch part of the wire bundle.

  With this configuration, in the present invention, depending on the shape of the branch portion of the wire bundle, any branch side sheet portion adjacent to each branch line portion or main line portion is partially adhered, and the branch side sheet portion Each branch line portion or main line portion can be bound by the widened portion. Further, the unused branch side sheet portion can be folded back so as to entirely wrap the branch portion together with the main sheet portion. Therefore, even if the number of branches at the branch portion of the wire bundle changes, and even when the angle between the branch line portion and the trunk line portion or the angle between the branch line portions changes, the branch is made by the same branch portion binding sheet. It will be possible to bind the parts accurately.

  The wire harness of this invention WHEREIN: The said branch part binding sheet | seat is good to have comprised the circular shape in which the said some branch side sheet | seat part was provided four or more.

  The method for manufacturing a wire harness according to the present invention includes a branch portion in which an electric wire bundle including a plurality of electric wires branches from the main wire portion into at least one branch wire portion, and the main wire portion and the branch portion of the electric wire bundle include A method of manufacturing a wire harness having a branch unit binding sheet having a plurality of branch side sheet units wound around each of the branch line units, wherein the wire harness is perpendicular to a support surface that supports the branch unit of the wire bundle. A center guide pin projecting from the center guide pin, a plurality of wire guide pins spaced parallel to each other on the circumference of the first radius from the center axis of the center guide pin, the support surface, and a circle of the first radius And a support plate portion having a plurality of guide insertion holes formed at equal angular intervals on the circumference, the guide guide holes being detachably attached to the guide guide holes, and the center guide pin. A main hole portion that is formed with a central hole to be inserted and has a substantially circular shape with a first radius from the center of the central hole, and a plurality of branch side sheet portions that are connected to each other by the main sheet portion. The plurality of branch side sheet portions are spaced apart from each other in the circumferential direction of the main sheet portion with gaps corresponding to the plurality of guide insertion holes, and extend radially outward from the main sheet portion at equal angular intervals. Each base end portion and each widened portion widened in the circumferential direction of the main sheet portion with respect to the base end portion on a second radius side larger than the first radius from the center of the center hole, An adhesive sheet having a single-sided adhesive is prepared as the branch part binding sheet, and the assembly is performed while the branch part binding sheet is positioned by the center guide pin and the plurality of wire guide pins. And then bending a part of the wires of the wire bundle along the periphery of the central guide pin, and arranging the plurality of wires of the wire bundle by the plurality of wire guide pins. The branch portion and the branch portion of the branch portion are formed so as to form the trunk portion and the branch portion of the branch portion while adhering the branch portion binding sheet to the plurality of electric wires in the guide state. Wrapping a part of the plurality of branch side sheet portions of the branch portion binding sheet to each of the branch portion binding sheets while positioning the main sheet portion of the branch portion binding sheet on one side of the branch portion of the wire bundle The plurality of electric wires constituting the branch portion of the electric wire bundle are fixed to a predetermined branch shape by a binding sheet.

  With this configuration, in the present invention, in a state where the branch unit binding sheet is positioned on the assembly jig, a part of the electric wires of the electric wire bundle is bent along the center guide pin or in the wiring direction by the electric wire guide pin. When guiding, the branch part binding sheet is adhered to a plurality of electric wires, and a part of the branch side sheet part of the branch part binding sheet is wound around the main line part and the branch line part near the branch part, and the main sheet part is Affixed to one side of the branch part, a plurality of electric wires constituting the branch part are fixed to a predetermined branch shape by the branch part binding sheet. At this time, according to the shape of the branch part, the branch line part or the trunk line part can be bound by any branch side sheet part adjacent to each branch line part or the trunk line part. Further, the unused branch side sheet portion can be folded back so as to entirely wrap the branch portion together with the main sheet portion. Therefore, even if the number of branches at the branch portion of the wire bundle changes, and even when the angle between the branch line portion and the trunk line portion or the angle between the branch line portions changes, the branch is made by the same branch portion binding sheet. It will be possible to bind the parts accurately.

  In this method of manufacturing a wire harness, a plurality of pre-adhesion sheets each having a release sheet bonded to the adhesive surface side are laminated on the support plate portion of the assembly jig, and the plurality of sheets Forming the adhesive sheet by peeling the release sheet of the uppermost pre-adhesion sheet of the pre-adhesion sheet, and forming the branch part of the wire bundle by the branch part binding sheet made of the adhesive sheet After fixing the electric wire in a predetermined branch shape, the adhesive sheet corresponding to the next electric wire bundle is released by peeling off the release portion of the pre-adhesion sheet directly below the branch portion of the wire bundle and the uppermost pre-adhesion sheet. Is preferably arranged on the jig.

  According to the present invention, while using the same branch portion binding sheet, excessive tape winding or dimensional measurement does not occur, and the assembly workability is improved even when there are a plurality of branch points. A good wire harness and a manufacturing method thereof can be provided.

(A) is a schematic perspective view of the jig | tool used for the assembly of the wire harness which concerns on one embodiment of this invention, (b) is a top view of the jig | tool. FIG. 2 is a state explanatory diagram of an assembly preparation stage in which a plurality of branch unit binding sheets with release sheets are stacked on the jig illustrated in FIG. 1. (A) is the top view which shows an example of the branch part binding sheet arrange | positioned on the jig | tool of FIG. 2, (b) is the top view which shows the other example of the branch part binding sheet. It is a schematic cross section which shows the layer structure of each branch part binding sheet shown to Fig.3 (a), (b). It is explanatory drawing of the general | schematic procedure of the branch part binding stage in the manufacturing method of the wire harness which concerns on one embodiment of this invention. (A) is a top view of the principal part of the wire harness which concerns on one embodiment of this invention, (b) is a bottom view of the principal part of the wire harness. It is process explanatory drawing of the manufacturing method of the wire harness which concerns on one embodiment of this invention. It is a perspective view which shows the general | schematic structure of the figure board for an assembly of a prior art example, and assembly.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(One embodiment)
The wire harness and the manufacturing method thereof according to an embodiment shown in FIGS. 1 to 7 are for manufacturing an automobile wire harness using an assembly drawing board with a jig.

  The wire harness assembling jig 10 shown in FIGS. 1A and 1B is disposed at any one of a plurality of wire harness support positions in the wiring pattern on the drawing board.

  The jig 10 includes a base member 11 fixed on a drawing board 1A (see FIG. 2) for assembling a wire harness having a wiring area, and a support member supported by the base member 11 so as to protrude onto the drawing board 1A. 12 and an electric wire receiving member 13 that supports and guides a part of the wire harness W (see FIG. 6) to a specific support position on the drawing board 1A while being supported by the support member 12.

  As shown in FIGS. 6A and 6B, the part of the wire harness W referred to here is holding for each predetermined length section of the trunk portion Wt of the wire bundle Wa that is a bundle of wire groups. The vicinity of the position, the vicinity of the branch part Wb where the branch line parts b1 and b2 branch and other branch parts, the base end part of the branch line parts b1 and b2, etc., the terminal part to which the connector and the terminal are attached, and the like.

  The base member 11, the support member 12, and the wire receiving member 13 are made of, for example, metal, but may be formed of a hard resin or other material or composite material, or may be composed of a combination of a plurality of different materials. May be.

  The wire harness W includes a branch portion Wb in which a wire bundle Wa including a plurality of wires w1 to w4 branches from the main line portion Wt to at least one branch line portion, for example, branch line portions b1 and b2, and the branch portion Wb The branch portion binding sheet 41 (see FIG. 3A) having a plurality of branch side sheet portions 45 wound around each of the trunk portion Wt and the branch portions b1 and b2 is mounted.

  The figure board 1A is comprised by the plate-shaped body used as an assembly work table similarly to the figure board 1 of the prior art example shown in FIG. 8, and a plurality of jig mounting holes corresponding to a plurality of wire harness support positions are arranged in the thickness direction. It is formed so as to penetrate, and is made of, for example, a wooden board such as plywood. However, the figure board 1A may be comprised with the porous metal plate, and the wiring pattern may be drawn on the upper surface of the figure board.

  A base member 11 of a wire harness assembling jig 10 is erected and fixed to the drawing board 1A using an arbitrary one of a plurality of jig mounting holes.

  The base member 11 has, for example, a mounting bolt (not shown) projecting vertically downward from the lower surface of the base main body portion having a substantially disc shape toward the drawing plate 1A, and the nut is screwed to the mounting bolt. It is fastened and fixed to the plate 1A. The support member 12 has a bar shape extending from the base member 11 side to the upper side of the drawing board 1A, for example, a round bar shape, and the base member 11 is integrally coupled to the lower end portion of the support member 12.

  The electric wire receiving member 13 cooperates with a substantially disc-shaped support plate portion 31 supported by the support member 12, a center guide pin 32 extending in the vertical direction near the center of the support plate portion 31, and the center guide pin 32. A plurality of, for example, four or more wire guide pins 33 that guide and hold the branching portion Wb (for example, corresponding to Wb2 in FIG. 8) of the wire harness W are configured.

  The support plate 31 includes a support surface 31a that supports the branch portion of the wire harness W, a center hole 31b having a predetermined depth that opens on the support surface 31a so that the center guide pin 32 can be inserted, and a plurality of guide insertion holes. A plurality of, for example, eight guide insertion holes 31c having a predetermined depth are formed on the support surface 31a so as to be selectively inserted into the support surface 31a.

  While the insertion position of the center guide pin 32 with respect to the support plate portion 31 is fixed, the insertion position and the number of insertions of the plurality of wire guide pins 33 with respect to the support plate portion 31 are in the shape of the branch portion Wb of the wire harness W. It is selectively set accordingly.

  As shown in FIG. 6 (a), the branch portion Wb of the wire harness W makes the branch line portions b1 and b2 orthogonal to the main line portion Wt, or at least one of the branch line portions b1 and b2 from the main line portion Wt. When forming the electric wires w1 and w2 that bend 90 degrees to the side, the insertion positions of the plurality of electric wire guide pins 33 are set at, for example, four positions at intervals of 90 degrees.

  When the bending angle of the branch line part b1 or the branch line part b2 with respect to the main line part Wt is not 90 degrees but is inclined so as to correspond to the branch part Wb1 in FIG. The insertion position and the number of insertions of the guide pin 33 can change.

  However, in any case, the plurality of wire guide pins 33 are parallel to each other and to the center guide pin 32 on the circumference of the first radius R1 from the center position Po through which the center axis of the center guide pin 32 passes. It will be in the state spaced apart in parallel. Therefore, the center hole 31b and the plurality of guide insertion holes 31c having a predetermined depth are formed so as to have axes parallel to each other.

  In the wire harness assembling jig 10, at least a part of the plurality of electric wires of the wire harness W is bent so as to be bent at a predetermined radius around the center guide pin 32.

  As shown in FIG. 2, a plurality of pre-adhesion sheets 40, for example, about 100 pre-adhesion sheets 40 are stacked on the support plate portion 31 of the jig 10 prior to assembly work.

  As shown in FIG. 4, each pre-adhesion sheet 40 comprises a single-sided adhesive binding sheet 41 by laminating an adhesive layer L2 on a base material layer L1 made of, for example, PCV tape, and an adhesive surface on the adhesive surface 41a side. A release sheet 42 is bonded as a release layer L3 that can be easily released from 41a.

  When the plurality of pre-adhesion sheets 40 are stacked on the support plate portion 31 of the wire harness assembling jig 10, the pre-adhesion sheets 40 are faced by the center guide pins 32 and the plurality of electric wire guide pins 33. It is positioned at a predetermined position in the direction.

  Specifically, as shown in FIG. 3A, the binding sheet 41 of each pre-adhesion sheet 40 is cut into a circular shape, and the release sheet 42 is also cut into the same shape as the binding sheet 41.

  The binding sheet 41 of each pre-adhesion sheet 40 is formed with a central hole 43 into which the central guide pin 32 is inserted and a main sheet portion 44 having a substantially circular shape with a first radius R1 from the center of the central hole 43. The plurality of branch side sheet portions 45 are connected to each other by the main sheet portion 44.

  The plurality of branch side sheet portions 45 are spaced apart from each other in the circumferential direction of the main sheet portion 44 with a substantially circular gap 45c corresponding to the plurality of guide insertion holes 31c, and are equiangularly spaced from the main sheet portion 44 in the radially outward direction. Each of the base end portions 45a extending in the circumferential direction of the main seat portion 44 with respect to the base end portion 45a on the radially outer side from the center of the center hole 43 to the second radius R2 greater than or equal to the first radius R1. And a widened portion 45b. The gap 45c may be a non-circular shape such as a sector shape or a square shape.

  As shown in FIG. 3A, in the binding sheet 41, a radial slit 46 extending radially outward from the substantially circular gap 45 c is provided between the adjacent widened portions 45 b of the plurality of branch side sheet portions 45. It may be formed. Alternatively, as shown in FIG. 3 (b), between the adjacent widened portions 45b of the plurality of branch side sheet portions 45, linear cuts or perforations extending radially outward from the substantially circular gap 45c are provided. The cutting part 47 may be formed, and the adjacent widened parts 45b of the plurality of branch side sheet parts 45 may be joined so as to be easily split by an external force.

  In the jig 10 for assembling the wire harness, after the center guide pin 32 is inserted into the center hole 43 of each pre-adhesion sheet 40, the plurality of wire guide pins 33 are inserted into the plurality of substantially circular gaps 45c. As described above, the protruding height of the center guide pin 32 on the support surface 31 a may be larger than the protruding height of the plurality of wire guide pins 33.

  Next, the manufacturing method of the wire harness which concerns on one Embodiment of this invention is demonstrated.

  First, the insertion position and the number of insertions of the plurality of wire guide pins 33 with respect to the support plate portion 31 of the jig 10 are set according to the shape of the branch portion Wb of the wire harness W. A plurality of insertion positions and the number of insertions corresponding to the shape of the branching portion Wb of the wire harness W are provided on the circumference of the first radius R1 from the central axis of the center guide pin 32 protruding to the center of the support surface 31a. The wire guide pins 33 are arranged and separated from each other in parallel.

  Next, a plurality of pre-adhesion sheets 40 are stacked on the support plate portion 31 of the jig 10 in the same posture with the respective adhesive surfaces 41a facing upward. At this time, the plurality of pre-adhesion sheets 40 are positioned by the center guide pins 32 and the plurality of wire guide pins 33.

  In this state, on the support plate portion 31 of the jig 10, the plurality of branch side sheet portions 45 are arranged in the circumferential direction of the main sheet portion 44 with a substantially circular gap 45c corresponding to the plurality of guide insertion holes 31c. The base ends 45a that are spaced apart from each other and extend radially outward from the main seat portion 44 at equal angular intervals, and the base ends at the second radius R2 that is larger than the first radius R1 from the center of the center hole 43 Each of the wide portions 45b is widened in the circumferential direction of the main sheet portion 44 with respect to the portion 45a.

  As described above, in the manufacturing method of the present embodiment, in the preparation step before assembly, first, the wire harness assembling jig 10 and the plurality of branch unit binding sheets 41 are prepared, and then the plurality of sheets are assembled. By stacking the branch portion binding sheet 41 on the support surface 31a of the jig 10, the branch portion binding sheet 41 is placed on the assembly jig 10 while being positioned by the center guide pin 32 and the plurality of wire guide pins 33. Put.

  Next, as shown by a two-dot chain line in FIG. 7A, the electric wires w1 and w2 which are a part of the electric wire bundle Wa are bent along the periphery of the center guide pin 32 to the lower side in FIG. The plurality of electric wires w1, w2, w3, and w4 of the bundle Wa are guided in the wiring direction by the center guide pin 32 and the plurality of electric wire guide pins 33. FIG. 5A shows a schematic shape at that time in a perspective view. In addition, in FIG.7 (b)-FIG.7 (g), illustration of the electric wires w1 and w2 is abbreviate | omitted for convenience.

  Next, as shown in FIGS. 7B and 7C, after the branch portion binding sheet 41 is adhered to the plurality of electric wires w1 to w4 on the jig 10, on or above the jig 10, A part of the plurality of branch side sheet portions 45 of the branch portion binding sheet 41 on each of the trunk portion Wt and the branch portions b1, b2 so as to form the main portion Wt and the branch portions b1, b2 of the branch portion Wb. Wrap.

  Next, as shown in FIGS. 5B and 7D to 7G, the main portion on the center side of the main sheet portion 44 on the upper side of the jig 10 is the branch portion Wb of the wire bundle Wa. The remaining portion of the plurality of branch side sheet portions 45 and a portion of the peripheral side of the main sheet portion 44 are folded back to the other one side of the branch portion Wb while being positioned on one side of the branch portion binding sheet 41. The plurality of electric wires w1 to w4 constituting the branch portion Wb of the electric wire bundle Wa are fixed to a predetermined branch shape.

  In the present embodiment, a plurality of pre-adhesion sheets 40 are laminated on the support plate portion 31 of the jig 10 in this manner, and the uppermost pre-adhesion sheet 40 among the plurality of pre-adhesion sheets 40. The release sheet 42 is peeled to form a branch portion binding sheet 41 made of an adhesive sheet, and the branch portion binding sheet 41 forms a plurality of wires w1 to w4 constituting the branch portion Wb of the wire bundle Wa into a predetermined branch shape. After fixing, the branch sheet Wb of the electric wire bundle Wa and the release sheet 42 of the pre-adhesion sheet 40 immediately below the uppermost branch part binding sheet 41 are peeled off, and the next electric wire bundle Wa to be subjected to the next branch part binding An adhesive sheet corresponding to the above is disposed on the jig 10.

  Next, the operation will be described.

  In the wire harness according to the present embodiment configured as described above and the method for manufacturing the same, depending on the shape of the branch portion Wb of the wire bundle Wa, any of the branch wire portions b1 and b2 or the main wire portion Wt is in close proximity. The branch side sheet portion 45 is partially adhered, and the branch line portions b1 and b2 or the main line portion Wt can be bound by the widened portion 45b of the branch side sheet portion 45. Moreover, the unused branch side sheet | seat part 45 can be return | folded so that the branch part Wb may be entirely wrapped with the main sheet | seat part 44. FIG.

  Therefore, even if the number of branches of the branch line parts b1, b2, etc. in the branch part Wb of the wire bundle Wa changes within a predetermined number of the set number (division number) of the branch side sheet part 45, the branch line Even if the angle formed by the part Wt and the trunk line parts b1 and b2 and the angle formed by the branch line parts b1 and b2 are changed, the different branch parts Wb can be accurately bound by the same branch part binding sheet 41.

  The center hole 43 is disposed near the center position Po of the bending position of the branch lines b1 and b2 that are bent with respect to the trunk line part Wt, or the bending center of the electric wires w1 and w2 with the center position of the main sheet part 44 being bent. Furthermore, since a wide adhesive region on the folding position side of the branch portion binding sheet 41 is formed between the trunk portion Wt and each branch portion b1, b2, the center position of the branch portion Wb and the branch portion b1, Since the branch position of b2 is clear, the branch position accuracy can be improved and the branch line length can be easily measured.

  Further, in the wire harness W of the present embodiment, the branch portion binding sheet 41 has a circular shape in which a plurality of substantially T-shaped branch side sheet portions 45 are provided at equal angular intervals, for example, eight. Therefore, it has no directionality and is easy to handle. Moreover, since the pre-adhesion sheet 40 can be accurately positioned while arranging the plurality of wire guide pins 33 in accordance with the shape of the branch portion Wb, the workability is further improved.

  As a result, in this embodiment, while using the same branch portion binding sheet 41, excessive tape winding or dimensional measurement of the branch portions b1, b2, etc. does not occur, and a plurality of branches Even in the case where there are portions, the wire harness W is excellent in workability of assembly work.

  Further, in the method of manufacturing the wire harness according to the present embodiment, a part of the electric wires w1 and w2 of the electric wire bundle Wa are used as the central guide pins 32 in a state where the branch portion binding sheet 41 is positioned on the assembling jig 10. When bending along the wire or guiding the wires w1 to w4 in the wiring direction by the plurality of wire guide pins 33, the branch portion binding sheet 41 is adhered to the plurality of wires w1 to w4, and the trunk line of the branch portion Wb A part of the branch side sheet portion 45 of the branch portion binding sheet 41 is wound around the portion Wt and the branch line portions b1 and b2, and the main sheet portion 44 is adhered to one side of the branch portion Wb of the electric wire bundle Wa, thereby branching. The plurality of electric wires w1 to w4 constituting the branch portion Wb of the wire bundle Wa are fixed to a predetermined branch shape by the partial binding sheet 41.

  At this time, as described above, each branch line portion b1 is formed by any branch side sheet portion 45 adjacent to each branch line portion b1, b2 or main line portion Wt according to the shape of the branch portion Wb of the wire bundle Wa. , B2 or the trunk portion Wt can be easily bundled. Further, the remaining branch side sheet portion 45 and the main sheet portion 44 can envelop the branch portion Wb as a whole.

  As a result, even if the number of branches in the branch portion Wb of the wire bundle Wa changes, the angle between the branch line portions b1 and b2 and the trunk line portion Wt and the angle between the branch line portions b1 and b2 also change. The same branch portion binding sheet 41 can accurately bind the branch portions Wb having different branch shapes. Therefore, the jig 10 can be used regardless of the branch shape of the branch part Wb, and the manufacturing cost of the wire harness W can be reduced by increasing the versatility of the jig 10.

  In particular, for a plurality of types of branch portions in the same wire harness W, a plurality of jigs 10 arranged on the drawing board 1A can be used to bind and fix all the branch portions, and the shape of each branch portion can be changed. An optimal guide arrangement that can be fixed to a stable shape is possible. That is, the jig 10 is a flexible tool that can accurately cope with different types of branch portions Wb, and is excellent in management and workability.

  Furthermore, in the method for manufacturing the wire harness of the present embodiment, a plurality of pre-adhesion sheets 40 each having a release sheet 42 bonded together are laminated on the support plate portion 31 of the assembly jig 10. The release sheet 42 of the upper pre-adhesion sheet 40 is peeled to form a branch portion binding sheet 41 made of an adhesive sheet, whereby a plurality of wires w1 to w4 constituting the branch portion Wb of the wire bundle Wa are formed into a predetermined branch shape. After being fixed to the branch portion Wb of the wire bundle Wa and the release sheet 42 of the pre-adhesion sheet 40 directly below the uppermost pre-adhesion sheet 40, the branch portion made of the adhesive sheet corresponding to the next wire bundle Wa The binding sheet 41 is disposed on the jig 10.

  Therefore, it is possible to continuously fix the wiring and the branch shape without newly arranging the branch portion binding sheet 41 on the jig 10 for fixing the binding of the branch portion Wb of the next wire bundle Wa. Greatly improved. As a result, while using the same branch part binding sheet 41, excessive tape winding or dimensional measurement does not occur, and the assembly workability is good even when there are a plurality of branch points. It becomes a manufacturing method of a wire harness.

  In the above-described embodiment, the electric wires w1 to w4 have been described as having a right-angled branch shape as a whole, but it goes without saying that the direction of branching and the number of branching line portions to be branched are arbitrary. . Of course, the support height of the wire bundle Wa by the jig 10 on the drawing board 1A can also change. The plurality of electric wire guide pins 33 may not be attached to and detached from the support plate portion 31, but may be held so as to be able to protrude and retract upward with respect to the support plate portion 31, or may be capable of switching the projection height in stages. .

  As described above, according to the present invention, while using the same branch portion bundling sheet, it is difficult to cause excessive variations in tape winding and dimension measurement, and the wire has good assembly workability even when it has a plurality of branch portions. A harness and a manufacturing method thereof can be provided, and is useful for a wire harness that fixes a main wire portion and a wire group of a branch wire portion at a branch portion of a wire bundle with a branch fixing tape, and a manufacturing method thereof in general.

DESCRIPTION OF SYMBOLS 10 Jig for wire harness assembly 13 Electric wire receiving member 31 Support plate part 31a Support surface 31b Center hole 31c Guide insertion hole 32 Center guide pin 33 Electric wire guide pin 40 Pre-adhesion sheet 41 Branch part binding sheet (adhesive sheet)
41a Adhesive surface 42 Release sheet 43 Center hole 44 Main sheet portion 45 Branch side sheet portion 45a Base end portion 45b Widened portion 45c Gap 46 Slit b1, b2 Branch line portion Po Bending inner center position (center axis of center guide pin)
R1 1st radius R2 2nd radius w1, w2, w3, w4 Electric wire Wa Wire bundle Wb Branching portion Wt Trunk portion

Claims (4)

The wire bundle including a plurality of electric wires has a branch portion that branches from the main line portion to at least one branch line portion, and adhesiveness that is wound around each of the main line portion and the branch line portion on the branch portion of the electric wire bundle. A wire harness to which a branch unit binding sheet having a plurality of branch side sheet units is mounted,
The branch portion binding sheet is formed with a center hole corresponding to the center position of the inner side of the electric wire bent at the branch portion of the wire bundle, and has a substantially circular shape with a first radius from the center of the center hole. A main sheet portion, and the plurality of branch side sheet portions connected to each other by the main sheet portion;
Each of the plurality of branch side sheet portions extends from the main sheet portion in a radially outward direction at equiangular intervals, and on the second radius side larger than the first radius from the center of the center hole. Each widened portion widened in the circumferential direction of the main sheet portion with respect to the base end portion, and
The wire harness, wherein the main sheet portion of the branch portion binding sheet is located on one side of the branch portion of the wire bundle.   2. The wire harness according to claim 1, wherein the branch portion binding sheet has a circular shape in which four or more of the plurality of branch side sheet portions are provided. A wire bundle including a plurality of electric wires has a branch portion that branches from the main line portion into at least one branch line portion, and a plurality of wires that are wound around each of the main line portion and the branch line portion on the branch portion of the electric wire bundle. A method of manufacturing a wire harness to which a branch unit binding sheet having a branch side sheet unit is mounted,
A central guide pin projecting perpendicularly to a support surface supporting the branch portion of the bundle of wires, and a plurality of electrical wire guide pins spaced from each other on a circumference of a first radius from the central axis of the central guide pin, And a support plate having a plurality of guide insertion holes formed at equiangular intervals on each of the circumferences of the first radius and the wire guide pins. While preparing the jig,
A main sheet portion formed with a center hole into which the center guide pin is inserted and having a substantially circular shape with a first radius from the center of the center hole, and a plurality of branch side sheets connected to each other by the main sheet portion And the plurality of branch side sheet portions are spaced apart from each other in the circumferential direction of the main sheet portion with gaps corresponding to the plurality of guide insertion holes and radially outward from the main sheet portion. Respective base end portions extending at equiangular intervals, and each widened in the circumferential direction of the main sheet portion with respect to the base end portion on the second radius side larger than the first radius from the center of the center hole. A one-sided adhesive sheet having a widened portion is prepared as the branching unit binding sheet,
After placing the branch portion binding sheet on the assembly jig while positioning with the center guide pin and the plurality of wire guide pins,
Bending a part of the wires of the wire bundle along the periphery of the center guide pin, and guiding the plurality of wires of the wire bundle in the wiring direction by the plurality of wire guide pins,
The branch portion is formed on each of the trunk portion and the branch portion so as to form the trunk portion and the branch portion of the branch portion while adhering the branch portion binding sheet to the plurality of electric wires in the guide state. Winding a part of the plurality of branch side sheet portions of the binding sheet,
While the main sheet portion of the branch portion binding sheet is positioned on one side of the branch portion of the wire bundle, the plurality of electric wires constituting the branch portion of the wire bundle by the branch portion binding sheet have a predetermined branch shape. A method of manufacturing a wire harness, characterized by being fixed to a wire harness. On the support plate portion of the assembly jig, a plurality of pre-adhesion sheets each having a release sheet bonded to the adhesive surface side are laminated and arranged,
The adhesive sheet is formed by peeling the release sheet of the uppermost pre-adhesion sheet among the plurality of pre-adhesion sheets, and the branch part of the wire bundle is configured by the branch part binding sheet made of the adhesive sheet After fixing the plurality of electric wires in a predetermined branch shape,
The adhesive sheet corresponding to the next wire bundle is disposed on the jig by peeling off the release sheet of the pre-adhesion sheet directly below the branch portion of the wire bundle and the uppermost pre-adhesion sheet. The manufacturing method of the wire harness of Claim 3.

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