JP2014204464A - Protective sheet for wire harness branch part and wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective sheet smoothly wound around a wire harness branch part with no gaps.SOLUTION: A protective sheet is formed from a rectangular resin sheet and has a T-shaped cut formed from one lateral slit extending from the intermediate point of one end in a length direction to an intermediate position in another length direction and a vertical slit extending from a cut end of the lateral slit to both sides in a width direction. The protective sheet has, at one side in the length direction, two branch wiring pieces separated in the width direction by the lateral slit and has, at the other side in the length direction, one main-line wiring piece in the length direction. The branch side end edge between the main-line wiring piece and each of the branch wiring pieces is divided by the vertical slit. A bonding face is provided along each of both end edges in the width direction. The main-line winding pieces is provided with the boding face on each of both edges in the width direction. Also, each branch wiring piece is provided with the bonding face on the outer edge opposite the lateral slit.

Description

  The present invention relates to a protective sheet for a wire harness branching portion and a wire harness around which the protective sheet is wound. Specifically, when a branch line branches from a trunk line of a wire harness into a T-shape or a Y-shape, one sheet of protection is provided. The sheet can protect the wire group of the wire harness without leaving a gap at the branching position.

  As a protective sheet for wrapping a protective sheet around the branch part of this type of wire harness to protect the electric wire at the branch part, in Japanese Patent Application Laid-Open No. 2011-199992, a square sheet having cuts as shown in FIGS. 100 is provided. The sheet 100 is provided with a pair of left and right lateral slits 101 and 102 from both ends in the lateral direction (X direction) at an intermediate position in the longitudinal direction (Y direction), and a lower half side portion 110 divided by the lateral slits 101 and 102. A pair of left and right vertical slits 103 and 104 are provided in the center portion of each. An adhesive surface 121 is provided along the lower edge of the lower half side portion 110, and an adhesive surface 122 is provided on the left edge of the upper half side portion 111.

  8A to 8F, the sheet 100 is folded at the portions divided by the slits 101 to 104, and the portions folded at the bonding surfaces 121 and 122 are bonded, so that the T-branch of the wire harness 200 is obtained. The trunk line 200A and the branch line 200B of the wire harness 200 are protected by the sheet 100.

JP 2011-199992 A

  In the sheet 100 of Patent Document 1, if the dimension between the ends of the vertical slits 103 and 104 and the horizontal slits 101 and 102 does not exactly match the wire diameter of the main line 200A, as shown in FIG. C is likely to occur. Therefore, it is necessary to wind the sheet so as not to generate a gap, and there is a problem that the sheet winding work is troublesome. In other words, it is necessary to accurately form the slits 101 to 104 provided in the sheet 100 in accordance with the dimensions of the branch portion of the wire harness around which the sheet 100 is wound. .

  Furthermore, if the branch line 200B is a T-shaped branch that branches in a direction substantially perpendicular to the main line 200A, the gap C can be kept small, but if the branch line 200B is inclined and becomes a Y-shaped branch, the branch line 200B becomes large. A gap C is generated.

  The present invention is intended to solve the above problem, and it is difficult to generate a gap at the branching portion, and can be shared even if the wire harness has a slightly different diameter, and can also be used for the T-shaped branch and the Y-shaped branch. It is an object of the present invention to provide a protective sheet for the wire harness branch used.

In order to solve the above-mentioned problems, the present invention comprises a resin-made rectangular sheet, one horizontal slit from an intermediate position at one end in the length direction to an intermediate position in the length direction, and a cut in the horizontal slit Provide a T-shaped incision consisting of a longitudinal slit from the end to both sides in the width direction,
Two branch wire-wound pieces divided in the width direction by the horizontal slits on one side in the length direction, and one main wire-wound piece on the other side in the length direction, the main wire-wound pieces and the A branching point side edge of each branch wire winding piece is divided by the vertical slit, and
Adhesive surfaces are respectively provided along both edges in the width direction, the main wire winding pieces are provided with the adhesive surfaces on both side edges in the width direction, and the branch wire winding pieces are opposite to the lateral slits. The adhesive surface is provided on the outer edge,
Wrapping both sides of the main wire winding piece around the main wire of the wire harness, and winding the branch wire winding piece around the branch wire from the edge side of the horizontal slit, and bonding the winding wire with the adhesive surface in a wound state. The protective sheet of the wire harness branching part is provided.

As described above, the protective sheet of the present invention has a horizontally long sheet with a T-shaped slit from the middle at one end in the length direction, and a pair of branch winding pieces by the horizontal slit of the T-shaped slit. Are provided separately, and the branch wire-wound piece and the main wire-wound piece are separated by a vertical slit at the branch position.
Put the trunk line on the trunk winding piece of the protective sheet, place the branch line on the branch winding piece, and wind each branch winding piece around the branch line from the edge on the side of the horizontal slit. Since it is separated by the winding piece side and the vertical slit, it can be wound without any twisting from the branch point with the trunk line. And it can adhere | attach and hold in a winding state by pressing the adhesion surface provided in the outer edge side of the branch wire winding piece after winding to the outer peripheral surface of the wound part. On the other hand, when winding a pair of branch wire winding pieces on both sides in the width direction, the main wire winding pieces are folded in two from the both ends in the width direction so that they can be wound with the main wire sandwiched between the upper and lower sides. .
In this way, a vertical slit is provided in a T-shape at the front end of the horizontal slit, and the branch wire winding pieces are separately provided, and the branch wire winding pieces and the main wire winding pieces are partially separated by the vertical slits at the boundary line. Because it is separated, the branch wire winding piece and the main wire winding piece can be smoothly wound from the branch point without causing twisting, and the gap where the electric wire is exposed to the outside including the branch point is not generated. Can be wrapped around.

  In addition, since each branch wire winding piece is separated from the other branch wire winding piece and the main wire winding piece by the vertical slit and the horizontal slit, after the branch wire winding piece is wound around the branch line, Opening at a desired angle without difficulty makes Y-branch and T-branch, and even when opened, no gap is generated at the branch point, and the exposure of the electric wire at the branch point can be prevented. That is, two branch lines can be branched from the trunk line with a Y-shaped branch, and one branch line is arranged in a substantially straight line with the trunk line, and the other branch line is arranged in a perpendicular direction to form a T-shape. It can be a branch.

The formation position of the horizontal slit is set so as to correspond to the outer diameter of the two branch lines branched from the trunk line, and to have a width around which the two branch line winding pieces are wound around the entire circumference of each branch line. ing.
Further, the length of the branch wire winding piece is a length required by the branch wire, and the length of the pair of branch wire winding pieces provided on both sides in the width direction can be easily made different. For example, when the branch wire winding piece is extended to the branch wire terminal, other exteriors such as tape winding and passing through the tube can be made unnecessary.

  The length of each vertical slit provided continuously at the top and bottom at the end of the horizontal slit is 30 to 50% of the width of the branch winding piece, and the width of the adhesive surface provided at both end edges in the width direction is outside. It is preferable that it is 30% or less from the edge, and the adhesive surface and the tip of the vertical slit are not brought into contact with each other.

  Moreover, it is preferable to provide a small-diameter circular hole for preventing cracks at the tip of the vertical slit.

  Furthermore, the present invention provides a wire harness in which the protective sheet is wound around a branch portion.

  As described above, according to the protective sheet for a wire harness branching portion according to the present invention, a rectangular protective sheet is provided with a transverse T-shaped slit from an intermediate portion at one end in the length direction, and each branch winding piece Since the branch winding portions are separated from each other at the branching portion, each branch winding portion and the main winding portion can be tightly wound without causing twisting at the branching portion. As a result, no gap occurs at the branching portion, the exposure of the electric wire can be prevented, and even if the branch lines and the branch line and the main line are bent at an arbitrary angle, the electric wire is not exposed at the branching portion, It can be used in common for Y-shaped branch and T-shaped branch.

It is a perspective view which shows the state which protected the Y-shaped branch part of the wire harness with the protection sheet of embodiment of this invention. It is a top view of the state which developed the protection sheet. (A)-(F) are drawings explaining the winding procedure of a protection sheet. (A) (B) is drawing which shows a 1st modification. It is a top view of the protection sheet of the 2nd modification. It is a top view of the protection sheet of the 3rd modification. It is a top view of the protection sheet of a prior art example. (A)-(F) is drawing which shows the winding procedure of the protection sheet of the said prior art example. It is drawing which shows the problem of the said prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
An embodiment is shown in FIGS.
In the present embodiment, the protective sheet 2 is wound around the Y-shaped branch portion P-1 of the wire harness 1 routed in the vehicle for protection.

  The protective sheet 2 has a shape shown in FIG. 2 and is made of a flexible rectangular sheet made of resin (in this embodiment, made of vinyl chloride). The sheet is cut into a strip-shaped continuous sheet and has a required length. It is said. The protective sheet 2 has a length La, a width Lb, and La> Lb.

  The protective sheet 2 has one lateral slit 5 in the length direction from the center position in the width direction (Y) at one end in the length direction (X) to a required position in the length direction (substantially the center position in the present embodiment). The length dimension of the horizontal slit 5 is s1, and s1 = 1/2 · La. Upper and lower vertical slits 6 and 7 in the figure are provided at the front end of the horizontal slit 5 toward both sides in the width direction. That is, a T-shaped cut is made in one half side of the protective sheet 2 from one end in the length direction of the protective sheet 2, and the half side 2a of the protective sheet 2 is divided into two in the width direction by the horizontal slit 5. . Thus, the two side wire wound pieces 10 and 11 having the width direction dimension s2 are provided on the half side portion 2a, and one main wire wound piece 12 including the other half side portion 2b of the protective sheet 2 is provided. Three winding pieces 10, 11, 12 are provided. The branch wire-wound pieces 10 and 11 have a length s1 and a width s2, and the main wire-wound piece 12 has a length s1 and a width 2s2 (Lb).

The branch wire winding piece 10 is connected to the branch wire 22 and the branch wire winding piece 11 is connected to the branch wire 23 with respect to the branch part P-1 where the branch wires 22 and 23 branch from the trunk line 21 of the wire harness 1 into a Y shape. The winding piece 12 is a winding piece to the main line 21.
In addition, the length s1 of the branch wire winding pieces 10 and 11 may be a length to be wound up to the ends of the branch wires 22 and 23. In that case, another armor (adhesive tape, round shape) is attached to the branch wires 22 and 23. Tube, corrugated tube, etc.) can be dispensed with. And when the winding length to the branch wires 22 and 23 differs, the length of the branch wire winding pieces 10 and 11 is made different.

  Moreover, the adhesive surfaces 8 and 9 which apply | coated the adhesive agent to the full length of the length direction are provided in the both ends edge of the width direction of one surface (inner surface) of the protective sheet 2. As shown in FIG. The bonding surface 8 extends to one end (upper end) of the branch wire winding piece 10, and the bonding surface 9 extends to the other end (lower end) of the branch wire winding piece 11 and is bonded to both ends of the main wire winding piece 12. Surfaces 8 and 9 are continuous. It is preferable to attach a release sheet (not shown) to these adhesive surfaces 8 and 9.

  A procedure for winding the protective sheet 2 around the branch portion P-1 where the two branch lines 22 and 23 branch from the trunk line 21 of the wire harness 1 in a Y shape will be described with reference to FIG.

  First, as shown in FIG. 3A, the protective sheet 2 is placed on a work table (not shown) with the adhesive surfaces 8 and 9 as the upper surface, and the trunk line 21 of the wire harness 1 is placed on the protective sheet 2. Is placed on the trunk winding piece 12, the branch line 22 is placed on the branch winding piece 10, and the branch wire 23 is placed on the branch winding piece 11.

  Next, as shown in FIG. 3 (B), the branch wire-wound piece 10 is separated by the trunk wire-wound piece 12 and the vertical slit 6, so that it is wound around the branch line 22 from the edge along the horizontal slit 5. The adhesive surface 8 is pressed against the outer surface of the winding portion and fixed. Thus, the branch wire 22 is protected by covering the entire circumference with the branch wire winding piece 10 from the branch portion P-1 to a required length position of the branch wire 22.

  One side in the width direction of the main wire winding piece 12 continuous at the edge in the width direction provided with the branch wire winding piece 10 and the adhesive surface 8 is continuous when the branch wire winding piece 10 is wound around the branch wire 22. Will be folded inward. Therefore, the upper part 12b folded back to the electric wire 21a branched to the branch line 22 in the electric wire group of the main line 21 is covered, and the adhesive surface 8 is pressed against the lower side part 12a in the center of the electric wire 21a or the main wire winding piece 12. To fix.

  Further, as shown in FIG. 3C, the other branch wire-wound piece 11 is separated from the main wire-wound piece 12 and the vertical slit 7, so that the edge from the edge along the horizontal slit 5 extends to the branch line 23. The adhesive surface 9 is pressed and fixed to the outer surface of the winding portion, and the branch wire 23 is wound around the branch wire winding piece 11 for protection.

  When the branch wire-wound piece 11 is wound around the branch wire 23, the other side in the width direction of the main wire-wound piece 12 continuous at the edge in the width direction provided with the branch wire-wound piece 11 and the adhesive surface 9 is When the winding piece 11 is wound around the branch line 23, the winding piece 11 is continuously folded back inward. Therefore, the upper portion 12c folded back to the electric wire 21b branched to the branch wire 23 in the electric wire group of the main wire 21 is covered, and the adhesive surface 9 is pressed against the lower portion 12a at the center of the electric wire 21b or the main wire winding piece 12. To fix. As a result, the state shown in FIG.

  As described above, the branch wire-wound piece 10 is wound around the branch wire 22 and the branch wire-wound piece 11 is wound around the branch wire 23. And as shown in FIG.3 (D), with respect to the trunk line 21, while inserting the electric wire 21a in the upper part 12b and the lower side part 12a, and fixing with the adhesive surface 8, the upper part in which the electric wire 21b is turned up 12c and the lower part 12a are pinched | interposed and it adheres with the adhesive surface 9. FIG.

Next, as shown in FIGS. 3 (E) and 3 (F), the trunk line 21 around which the trunk winding piece 12 is wound includes a portion covered with the upper portion 12b and a portion covered with the upper portion 12c in FIG. 3 (D). Fold it in half as shown by the arrow. In this overlapped state, the portion where the adhesive surfaces 8 and 9 are bonded to the lower side portion 12a is located on the inner side. In this state, the adhesive tape 18 is wound around the trunk winding piece 12. In this state, the bonded portion is hidden inward and covered with the adhesive tape 18, and the gap is not exposed to the outside.
In addition, it is good also as a state as it is, without folding up and overlapping the upper parts 12b and 12c covered on the trunk line 21.
Further, when winding the branch wire winding pieces 10 and 11 wound around the branch wires 22 and 23 to the root position of the connector connected to the branch wire terminal, as shown in the drawing, the branch wire winding pieces 10 and 11 are formed with an adhesive tape. The tip of is not wrapped. When the ends of the branch wire winding pieces 10 and 11 do not reach the base position of the connector, it is preferable to wind an adhesive tape.

Finally, the branch lines 22 and 23 wound with the branch wire-wound pieces 10 and 11, respectively, with respect to the trunk line 21 around which the trunk wire-wound piece 12 is wound, with the branch point P0 as a fulcrum, as shown in FIG. It opens at the required angle θ and branches into a Y shape. At that time, since the vertical slits 6 and 7 are provided at the leading end of the horizontal slit 5, the branch winding pieces 10 and 11 can be wound around the branch lines 22 and 23 up to the leading end of the branch point P0, respectively. Even if the branch lines 22 and 23 are opened at a large angle at the point P0, the branch line winding pieces 10 and 11 are reliably wound up to the branch point P0, so that there is no gap and the exposure of the branch line can be prevented. In addition, the trunk line 21 around which the trunk winding piece 12 is wound is also obtained by firmly bonding the folded upper part 12b, 12c of the trunk winding piece 12 to the lower part 12a up to the tip of the branch point P0. Do not expose by covering securely with the winding piece 12.
Therefore, it is not necessary to wrap the adhesive tape around the branch point P0 to prevent the exposure of the electric wire group. However, the adhesive tape 19 is wound around the branch point P0 corresponding to the intersection of the horizontal slit 5 and the vertical slits 6 and 7, and Prevents cracks.

  As described above, a single-line protective sheet 2 is provided with a T-shaped notch by continuously connecting the longitudinal slits 6 and 7 at the front end of the horizontal slit 5 and is wound around the branch lines 22 and 23. Since the attached pieces 10 and 11 are separated from the trunk-wound piece 12 wound around the trunk line 21, the branch-wound pieces 10 and 11 are not twisted in the protective sheet until the branch point P0. Can be wrapped around. And after winding the branch wire winding pieces 10 and 11 and the main wire winding piece 12 around the branch lines 22 and 23 and the trunk line 21, respectively, even if the branch lines 22 and 23 are expanded to a required angle with the branch point P0 as a fulcrum, Since the longitudinal slits 6 and 7 are provided, the branch line can be bent without causing the protective sheet 2 to be twisted, and a gap for exposing the electric wire at the branch point P0 does not occur even if the branch line is widened to a required angle.

4A and 4B show a first modification.
In the first modified example, the T-shaped branch portion P-2 is covered with the protective sheet 2 for protection.
In the T-shaped branch portion P-2, one of the branch lines 22 and 23 of the first embodiment, for example, the branch line 22 becomes a trunk line 21-A continuous with the trunk line 21 across the branch position. -A is placed on the branch wire winding piece 10 and the branch wire winding piece 10 is wound in the same manner as the branch wire 22 of the first embodiment.
After the winding, the branch wire 23 around which the branch wire winding piece 11 is wound is protruded from the branch portion P-2 of the trunk wires 21 and 21-A wound around the winding pieces 12 and 11 in a direction perpendicular to the trunk line. ing. Thereby, the protection sheet 2 is wound around the T-shaped branch part P-2 to protect the wire without exposure.

FIG. 5 shows a second modification.
In the second modification, the branch lines 22 and 23 branch from the trunk line 21 in a Y shape are different in thickness, and the branch line 22 is thicker than the branch line 23. Moreover, the length of the area | region protected with the protection sheet 2 differs, and the length of the branch wire winding piece 10 of the branch wire 22 is longer than the branch wire winding piece 11 of the branch wire 23. FIG.
In the protection sheet 2 of the second modified example, the positions where the horizontal slits 5 are inserted are different, and the width of the branch winding piece 10 wound around the branch line 22 is made larger than the width of the branch winding piece 11 wound around the branch line 23. And the length of the branch wire winding piece 10 is made longer than the branch wire winding piece 11.
Since the winding procedure and effects of the branch wire winding pieces 10 and 11 and the main wire winding piece 12 around the branch wires 22 and 23 and the main wire 21 are the same as those in the first embodiment, the description thereof is omitted.

FIG. 6 shows a third modification.
In the third modification, small-diameter round holes 6h and 7h are provided at the ends of the vertical slits 6 and 7 of the protective sheet 2 to prevent cracks from occurring at the ends of the slits. Since the other configuration and the procedure for winding the protective sheet around the branch portion are the same as those in the embodiment, the description thereof is omitted.

DESCRIPTION OF SYMBOLS 1 Wire harness 2 Protective sheet 5 Horizontal slit 6, 7 Vertical slit 8, 9 Adhesion surface 10, 11 Branch wire winding piece 12 Trunk winding piece 18, 19 Adhesive tape
22, 23 branch line

Claims (5)

It consists of a rectangular sheet made of resin, and consists of one horizontal slit from an intermediate position at one end in the length direction to an intermediate position in the length direction, and a vertical slit from the cut end of the horizontal slit toward both sides in the width direction. Provide a T-shaped cut,
Two branch wire-wound pieces divided in the width direction by the horizontal slits on one side in the length direction, and one main wire-wound piece on the other side in the length direction, the main wire-wound pieces and the A branching point side edge of each branch wire winding piece is divided by the vertical slit, and
Adhesive surfaces are respectively provided along both edges in the width direction, the main wire winding pieces are provided with the adhesive surfaces on both side edges in the width direction, and the branch wire winding pieces are opposite to the lateral slits. The adhesive surface is provided on the outer edge,
Wrapping both sides of the main wire winding piece around the main wire of the wire harness, and winding the branch wire winding piece around the branch wire from the edge side of the horizontal slit, and bonding the winding wire with the adhesive surface in a wound state. Protection sheet for wire harness branching section.   The formation position of the horizontal slit is set so as to correspond to the outer diameter of the two branch lines branched from the trunk line, and to have a width around which the two branch line winding pieces are wound around the entire circumference of each branch line. The protective sheet of the wire harness branch part of Claim 1.   The length of each vertical slit provided continuously at the top and bottom at the end of the horizontal slit is 30 to 50% of the width of the branch winding piece, and the width of the adhesive surface provided at both end edges in the width direction is outside. The protective sheet for a wire harness branching portion according to claim 1 or 2, wherein the protective surface is 30% or less from the edge, and the adhesive surface and the tip of the vertical slit are not in contact with each other.   The protective sheet of the wire harness branch part of any one of Claim 1 thru | or 3 which has provided the small diameter circular hole for crack prevention in the front-end | tip of the said vertical slit.   A wire harness in which the protective sheet according to any one of claims 1 to 4 is wound around the branch portion.

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