JP2017112804A - Sheet for wire harness and outer packaging structure of wiring harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet having excellent wrapping workability for a wiring harness.SOLUTION: A sheet 1 is for being wound to an outer periphery of a wiring harness, is made of a resin or a rubber, and is formed in a rectangle shape and a flat state. In one surface of the sheet 1, dents 11 and 12 are provided at a position away by a dimension L1 from a central position of a width direction or/and the central position in a whole length of a longitudinal direction, and in one end of at least width direction of one surface to which the dents 11 and 12 are provided, an adhesion agent coating part 2 of a width L2 quadruple the dimension L1 is provided in the whole length.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wire harness sheet and an exterior structure of a wire harness around which the sheet is wound, and in particular, has a structure in which the sheet can be easily wound around the wire harness.

  When wiring a wire harness composed of an electric wire group connected to a connector or the like to a vehicle, the electric wire group is covered with an exterior material such as a tape, a sheet, or a tube in order to focus and protect the electric wire group. Of these exterior materials, resin-made sheets that are formed in a rectangular shape with a length that requires an exterior and a width that can be wound around an electric wire group change the type of sheet, making it heat resistant, flame retardant, and impact resistant Have been widely used in the past because they can meet various demands such as performance and vibration absorption.

A widely used sheet for a wire harness is usually made of vinyl chloride, has a thickness of 1 to 2 mm, and is provided with an adhesive coating surface having a full length in one end in the width direction of one surface of the sheet, or one surface of the sheet An adhesive coating surface is provided on the entire surface.
A foamed rubber sheet is used as a sheet for heat insulation protection, and a urethane sheet or the like is used as a sheet for waterstop. These sheets have a thickness of 3 mm to 5 mm.

  This type of wire harness sheet is disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-82341 related to the applicant's application, and as shown in FIG. As the winding method, sushi winding shown in FIG. 9 (B), worship winding in which both ends are overlapped and pasted as shown in FIG. 9 (C), and the worshiped portion shown in FIG. There is a winding method in which an adhesive tape (not shown) is wound around both ends in the length direction.

JP 2000-82341 A

  The sheet wound around the wire harness is cut into a flat rectangle having a predetermined length and width. This flat sheet is rolled around a wire harness and wound, and finally the adhesive applied to the winding end adheres to the already wound sheet surface, but the adhesive part always peels off due to the sheet's warping force. Directional load is applied, and peeling is likely to occur. In order to prevent peeling, a pressure force is applied to the adhesive portion twice and three times to increase the adhesive strength, or both ends of the wound sheet in the length direction are wound with an adhesive tape.

However, even if the adhesive tape is wound and fixed at both ends in the length direction, if the sheet winding area is long, the adhesive portion may peel off in the middle of the length direction, and the part of the adhesive tape to be wound The cost and the cost of winding the adhesive tape are high, and the cost becomes high.
In addition, even if the adhesive part at the winding end of the sheet is pressed twice to 3 degrees, the sheet always has a force to warp in the flattening direction, so the adhesive part will peel off over time. It becomes easy to do. In this case also, the number of work is increased and the cost is increased.

  Furthermore, when a sheet is wound around a wire harness in a long region, the sheet is easy to be wound in a state inclined with respect to the central axis of the wire harness in the length direction, and it is difficult to wind evenly in the length direction. There is room for.

The present invention is intended to solve the above problem, and prevents the sheet wound around the wire harness from being warped, so that the sheet is less likely to be peeled off when the adhesive applied to the sheet is applied once. The problem is to do.
Another object of the present invention is to make it easy to wind a sheet evenly and accurately around a wire harness.

  In order to solve the above-mentioned problem, as a first invention, a sheet wound around the outer periphery of a wire harness, which is a rectangular flat shape made of resin or rubber, and has a central position in the width direction or / and the one surface of the sheet. A depression is provided in the entire length in the length direction at a position separated from the center position by the dimension L1, and at least one end in the width direction of the surface on which the depression is provided has a width four times the dimension L1. The sheet | seat for wire harnesses characterized by the adhesive application part being provided over the full length by L2.

  Specifically, the sheet is made of vinyl chloride having a thickness of 1 to 3 mm, the depth of the recess is 10% to 50% of the thickness and the width is 50% to 200% of the thickness, The pressure-sensitive adhesive application portion is provided on one surface of the sheet that is an inner peripheral surface in contact with the outer peripheral surface of the wire harness, and the first recess including the recess is provided in the center in the width direction. It is preferable that the 2nd hollow is provided in the position away from the hollow by the dimension L1 in the opposite direction to the said adhesive application part.

The depression is formed by, for example, forming a sheet by continuous extrusion or the like, and pressing a roller against the upper surface of the sheet in a process in which the sheet is continuously conveyed from an extruder.
When one recess of the first recess or the second recess is provided, it is formed by one roller, and when two recesses of the first recess and the second recess are provided, they are simultaneously formed by two rollers. ing.

Furthermore, the sheet of the present invention may be provided with an identification line at a position facing the depression on the opposite surface (outer surface) to the one surface (winding side inner surface) provided with the depression and the adhesive application portion. .
If the dent is folded in half on the wire harness with the inside as the inner side, the position of the dent will be difficult to see from the outside. Can be the starting point of bending.

In the sheet of the present invention, since the depression is provided at the center in the width direction or at a position slightly offset from the center, a load is applied in the folding direction starting from the depression, and the warping force that returns to the flat shape from the folded state, that is, the sheet The reaction force can be greatly reduced.
Specifically, when the sheet is folded in two with the wire harness placed at the center position of the seat, when the dent is located at the folding start point, the folded upper seat portion is folded by the force of opening back flat. The force is applied in a direction in which the adhesive application portion at one end in the width direction adheres to the other end.
When the sheet is wound around a wire harness, if one end in the width direction where the pressure-sensitive adhesive application portion is located is wound as the inner surface side of the winding end, the pressure-sensitive adhesive application portion is curved toward the inner peripheral side by the force of opening to the outer peripheral side. As a result, the adhesive application portion can be firmly adhered to the outer surface of the sheet of the first winding portion at the end of the sushi winding.

An identification line may be added to the position where the dent is provided from the viewpoint that the reaction force to return to the original flat state is small when the sheet is relatively thin and folded in two, or from the viewpoint of improving the winding workability.
Therefore, as a second invention, the present invention is a sheet that is wound around the outer periphery of the wire harness, is a rectangular flat shape made of resin or rubber, and one surface or / and the other surface of the sheet has a central position in the width direction. At the position where the dimension L is separated, an identification line is provided over the entire length in the length direction, and an adhesive application portion is provided over the entire length at one end in the width direction of the sheet with a width twice as large as the dimension L. A sheet for a wire harness is provided.

Furthermore, the present invention provides an exterior structure of a wire harness that is wound around the wire harness with the depression of the wire harness sheet as a bending starting point.
That is, the sheet recess and the adhesive application part are wound on the outer peripheral surface of the wire harness with the inner side as the inner surface side and folded in half starting from the depression, and both ends in the width direction are overlapped and adhered by the adhesive application part. And the exterior structure of the wire harness by which the said sheet | seat is wound around the wire harness is provided.

When the wire harness is wrapped around a sheet, the first recess may be used as a first wrapping wound with the first dent as a starting point in which the sheet is folded in two directions and adhered at the adhesive application portion. As described above, a second worship structure having the second depression as a folding start point may be used.
That is, the folding start point of the sheet is a depression (second depression) at a position where the dimension L is separated from the center position in the width direction, the inner side in the width direction of the adhesive application part is the front adhesive part, and the outer side is the rear adhesive part. And
The other end in the width direction of the sheet placed on the wire harness is overlapped and adhered to the tip adhesive portion, and the portion sandwiching the wire harness in the state is further folded, and the outer surface of the folded portion is The rear adhesive part is adhered.

  In the second web winding, when the outer dimension of the wire harness is smaller than the width dimension of the sheet, a surplus width is generated in the sheet. Therefore, the other half is overlapped and adhered to the inner half of the adhesive application portion. With the wire harness sealed inside the tube folded in half, the wire harness is further folded to prevent the wire harness from rattling inside, and then the remaining half of the adhesive application part is folded back multiple times. Adhering to the outer surface of the part.

  As described above, when the second half-wrapping structure using the inner half of the adhesive application portion provided at one end in the width direction as the front adhesive portion and the outer half as the rear adhesive portion, the sheet width is considerably larger than the outer dimension of the wire harness. Even when the wire harness is large, all the electric wires constituting the wire harness can be wound around the sheet without backlash, and it is not necessary to wrap the adhesive tape after the sheet is wound to reduce the diameter of the worship winding portion of the sheet.

  In the wire harness sheet of the present invention, the depression is formed over the length direction at the center position in the width direction and / or at a position close to the center position. Therefore, when the sheet is folded over the wire harness from the depression, A load is applied in the direction, and the warping force of returning from the folded state to the flat state, that is, the reaction force of the sheet can be greatly reduced. Therefore, it is not necessary to press the adhesive part twice or three times to increase the adhesive force, and it is not necessary to wrap the adhesive tape. Thus, the number of work can be reduced and the cost can be reduced.

It is a perspective view which shows the sheet | seat of 1st Embodiment of this invention. (A) (B) is a schematic perspective view which shows the manufacturing process of the said sheet | seat. (A) is a side view of the said sheet | seat, (B) is a principal part expanded sectional view of (A). (A)-(D) is drawing which shows the process of winding a wire harness with the said sheet | seat first. (A)-(D) are drawings which show the process of winding a wire harness with the said sheet | seat second. (A) (B) is drawing which shows the process of winding a wire harness with the said sheet | seat. (A) (B) (C) is drawing which shows the modification of the sheet | seat of the said 1st Embodiment. The sheet | seat of 2nd Embodiment of this invention is shown, (A) is a side view, (B) is a bottom view, (C) is drawing which shows a 2nd enrollment process. (A)-(D) are drawings which show a prior art example.

  Hereinafter, the wire harness sheet of the present invention and the wire harness sheathed with the sheet will be described with reference to the drawings. 1st Embodiment is shown in FIG. 1 thru | or FIG.

  The wire harness sheet 1 of the first embodiment is made of a vinyl chloride resin, and is provided with two recesses including a first recess 11 and a second recess 12 continuous in the length direction X. The sheet 1 is cut at a length X1 around which the sheet material 1-1 shown in FIG. 2 is wound around the wire harness 10, and is formed into a rectangular sheet 1 having dimensions of the length and the width Y1. In addition, if the width dimension Y1 of the sheet | seat 1 is the range of 10% or more and 200% from the outer periphery dimension of the wire harness 10 to wind, it is used in common.

  The sheet material 1-1 is continuously extruded from a continuous extruder with a required width Y1. As shown in FIG. 2 (A), two rollers 51 and 52 are pressed against the upper surface of the sheet material 1-1 against the sheet material 1-1 continuously extruded from the continuous extrusion molding machine. Two depressions comprising a first depression 11 and a second depression 12 continuous in the direction are provided. Although the bottom surfaces of the first and second depressions 11 and 12 are thin, they are compressed by the rollers 51 and 52 to increase the strength.

  The first recess 11 is provided at the center (1/2) position of the width Y1 of the sheet 1, and the second recess 12 is provided at a position away from the first recess 11 by a dimension L1. The adhesive application part 2 is provided along the edge 1a opposite to the side where the second depression 12 is provided in the width direction. The application surface of the pressure-sensitive adhesive application unit 2 is the same as the surface 1 s of the sheet 1 provided with the first and second depressions 11 and 12. In addition, you may stick the release paper which peels at the time of use on the surface of this adhesive application part 2. As shown in FIG. The other end edge 1b of the sheet 1 is not provided with an adhesive application portion.

  The width L2 of the adhesive application part 2 is four times the offset dimension L1 of the first recess 11 and the second recess 12 (that is, L1 is 1/4 of L2). In this embodiment, L2 is 20 mm and L1 is 5 mm. In other words, the first recess 11 is provided at the center of the sheet 1 in the width direction, and the second recess 12 is provided at a position 5 mm away from the center.

  As shown in FIG. 3, the thickness (t) of the widely used sheet 1 made of vinyl chloride is 1 to 3 mm. In the sheet having a thickness of 1 to 3 mm, the depth (d) of the first recess 11 and the second recess 12 is 10% to 50% of the thickness (t), and the width S is 50 to 200 of the thickness (t). %. In the present embodiment, the sheet thickness (t) is 2 mm, the depth (d) of the first and second recesses is 0.3 mm, and the width (S) is 2 mm.

The sheet 1 is wound around the outer periphery of the wire harness 10 to bind a plurality of electric wires 10W constituting the wire harness 10 and protect them from an external interference material.
As a method of winding the sheet 1 around the wire harness 10, there are a first worship winding method shown in FIG. 4, a second worship winding method shown in FIG. 5, and a sushi winding method shown in FIG.

  The first worship winding method shown in FIG. 4 is a commonly used worship winding method, in which the sheet 1 is folded in two with the wire harness 10 sandwiched, and both end edges 1a and 1b in the width direction are overlapped and adhered. ing. Specifically, as shown in FIG. 4A, one surface 1s of the sheet 1 is the upper surface, and the wire harness 10 is placed along the first recess 11 in the center in the width direction. As shown in FIG. 2, the wire harness 10 is folded in half with the first recess 11 as a starting point. The half-width portion 1e provided with the pressure-sensitive adhesive application portion 2 is folded on the lower surface side, and the other half-width portion 1f is placed on the upper surface side so that the upper surface of the wire harness 10 is covered.

As described above, when the sheet 1 is folded in two with the wire harness 10 being sandwiched, the half-width portion 1f on the upper surface side acts as a reaction force to return to the opening direction in the conventional sheet without the depression, and the adhesive application portion 2 The edge 1b on the upper surface is bonded to the surface, and a load in the peeling direction is applied.
On the other hand, in the sheet 1 of the present invention, the first dent 11 is present at the folding start point and the second dent 12 is present in the half-width portion 1f on the upper surface side in the proximity position. The warping / returning force (sheet reaction force) that returns to the flat shape from the sheet is greatly reduced. Therefore, as shown in FIG. 4D, when the end portion 1b of the upper half width portion 1f is aligned with the end edge 2b of the adhesive application portion 2 on the lower surface side, a load in the peeling direction is applied. Instead, the sheet 1 can be securely adhered by a single bonding, and the sheet 1 can be wound around the outer periphery of the wire harness 10 by the first worship winding method to provide an exterior.
Therefore, a strong pressing operation of 2 to 3 times of the adhesive portion which has been conventionally performed is not necessary, and it is not necessary to wrap the adhesive tape at both ends in the length direction.
The first worship winding is preferably used when the electric wire group of the wire harness 10 is focused in the seat 1 with almost no backlash while the sheet 1 is wrinkled around the wire harness 10.

  In the second worship winding method shown in FIG. 5, the folding start point of the sheet 1 is the second recess 12, and as shown in FIG. 5 (A), an adhesive application portion provided at one end edge 1 a in the width direction of the sheet 1. 2, the inner half is the front adhesive portion 2i, and the outer half is the rear adhesive portion 2u.

  In the second worship winding, as shown in FIG. 5 (B), the other end edge 1b on the upper surface side is overlapped with the center position in the width direction of the adhesive application portion 2 of the edge 1a on the lower surface side, and the tip adhesion is performed. Adhering to the part 2i, the rear adhesive part 2u is projected outward. As described above, when the other end edge 1b on the upper surface side is overlapped with the center position in the width direction of the adhesive application portion 2, the starting point of the double fold automatically becomes the second depression 12. Even when the wire harness 10 is folded with two second dents 12 as the starting point, the second dent 12 is at the bending starting point, as in the case of the first worship winding. The warping force (sheet reaction force) that returns to a flat state from the state is greatly reduced. Therefore, if the edge 1b of the half-width part 1f on the upper surface side is aligned and bonded to the tip adhesive part 2i of the adhesive application part 2 on the lower surface side, a load in the peeling direction is not applied, and it is ensured by one bonding. Can be adhered.

  In the second worship winding, since the outer peripheral dimension of the wire harness 10 is smaller than the width dimension of the sheet 1, the wire harness is folded inside the sheet 1 into the cylindrical body 1 k by being folded in half and adhered to the tip adhesive part 2 i. Since 10 electric wires 10W are rattled, as shown in FIG. 5 (C), the cylindrical body 1k is bent so that the electric wire 10W does not rattle inside, and in this state, as shown in FIG. 5 (D), It sticks to the outer surface of the cylinder 1k which bent the outer adhesive part 2u protruded outward.

  In this way, by leaving the outer half of the adhesive application part 2 of the sheet 1 as the rear adhesive part 2u, after bending until the electric wire of the wire harness 10 does not rattle inside, the rear adhesive part 2u adheres. be able to. Therefore, in order to reduce the diameter of the sheet 1 wound around the wire harness 10, it is not necessary to wind a separate part of the adhesive tape, and the part cost and the work cost can be reduced. And even if the outer periphery length of the wire harness 10 differs, it can share and use with the sheet | seat 1, and a cost reduction can be aimed at also from this point.

  The sushi winding shown in FIG. 6 is a well-known winding method. As shown in FIG. 6 (A), the adhesive application portion 2 of the one end edge 1a in the width direction of the sheet 1 is used as the inner surface of the winding end, and the other end edge. 1b is wound around the outer periphery of the wire harness 10 with the winding start end. When the first dent 11 and the second dent 12 at the central portion in the width direction are wound around the outer periphery of the wire harness 10 in the wound state, a load in the wrapping direction is applied by the first dent 11 and the second dent 12. The reaction force in the rewinding direction is greatly reduced. Therefore, it can be reliably adhered only by strongly pressing the pressure-sensitive adhesive application part 2 on the inner surface of the winding end end against the outer surface of the sheet 1 that has been wound beforehand.

  As described above, when the sheet 1 provided with the first dent 11 and the second dent 12 is used, it is possible to select and wind the two folding points of the first worship winding and the second worship winding, and also sushi winding. In any winding method, the reaction force in the rewinding direction can be greatly reduced in the winding process, and the wire harness 10 can be reliably sheathed with the sheet 1 with a single adhesive.

7A, 7B, and 7C show a modification of the first embodiment.
The sheet of the first modification shown in FIG. 7A is not provided with the second depression, but only the first depression 11 is provided for the first worship winding and the sushi winding.
The sheet of the second modified example shown in FIG. 7B is not provided with the first dent but is provided with only the second dent 12 for the second worship winding and the sushi winding.
The sheet of the third modification shown in FIG. 7C is provided with the first depression and the second depression on one surface 1s as in the first embodiment, and corresponds to the first depression 11 on the other surface 1r of the sheet. A first identification line 21 is provided at a position, and a second identification line 22 is provided at a position corresponding to the second depression 12. As described above, when the first and second identification lines 21 and 22 are provided, the first and second identification lines 21 and 22 appear on the outer surface in a state in which the sheet 1 is folded in half. It can be bent accurately as a starting point.
Since the other configurations of the first to third modifications are the same as those of the first embodiment, and the winding method and the operational effects are also the same, description thereof will be omitted.

FIG. 8 shows a sheet 1-B of the second embodiment.
The sheet 1-B is thinner than the sheet 1 of the first embodiment, and has a smaller reaction force to return to a flat shape than the sheet of the first embodiment in a folded state. Therefore, the first and second depressions provided in the first embodiment are not provided, and only the identification line 30 is provided on the back side of the position where the dimension L is away from the center position corresponding to the second depression, and the first shown in FIG. Two worship rolls are made easy.
Similarly to the sheet of the first embodiment, the adhesive application part 2 having a width twice as large as the dimension L is provided along the one end edge 1a of the sheet 1-B, and the inner half of the adhesive application part 2 is used as the first adhesive part. 2i, the outer half is the rear adhesive portion 2u.
As shown in FIG. 8C, the sheet 1-B is wound around the wire harness 10 by the second worship winding similar to FIG.

  Note that an identification line may be provided at a position corresponding to the first recess 11, or an identification line may be provided at a corresponding position on the back surface side as in FIG.

  The present invention is not limited to the above-described embodiment, and is not limited to a sheet made of vinyl chloride, and a reaction force that returns to a flat state is generated when folded even in the case of a thick polyurethane sheet for a waterproof sheet and a thick foamed rubber sheet. Therefore, it is preferable to provide a dent that serves as a bending starting point.

DESCRIPTION OF SYMBOLS 1 Sheet 2 Adhesive application part 10 Wire harness 11 1st dent 12 2nd dent 21, 22, 30 Identification line

Claims (6)

  A sheet that is wound around the outer periphery of the wire harness, is a rectangular flat shape made of resin or rubber, and has a length on one surface of the sheet at the center position in the width direction and / or at a position separated from the center position by a dimension L1. A depression is provided in the entire length in the direction, and at one end in the width direction of one surface where the depression is provided, an adhesive application portion is provided over the entire length with a width L2 that is four times the dimension L1. A wire harness sheet characterized by the above.   The sheet is made of vinyl chloride having a thickness of 1 to 3 mm, the depth of the recess is 10% to 50% of the thickness, and the width is 50% to 200% of the thickness. The pressure-sensitive adhesive application portion is provided on one surface of the sheet that is in contact with the inner peripheral surface, and the first depression made of the depression is provided at the center in the width direction, and the pressure-sensitive adhesive is removed from the first depression. The sheet | seat for wire harnesses of Claim 1 with which the 2nd hollow is provided in the position away only the dimension L1 in the opposite direction to the application part.   The sheet | seat for wire harnesses of Claim 1 or Claim 2 which attached | subjected the line for identification to the position facing the said hollow on the surface opposite to the one surface which provided the said hollow and the adhesive application part.   A sheet that is wound around the outer periphery of the wire harness, is a rectangular flat shape made of resin or rubber, and in the length direction at a position where the dimension L is separated from the center position in the width direction on one surface and / or the other surface of the sheet For a wire harness, characterized in that an identification line is provided over the entire length of the sheet, and an adhesive application part is provided over the entire length at one end in the width direction of the sheet with a width twice the dimension L. Sheet.   An exterior structure of a wire harness in which the wire harness is wrapped around the dent of the wire harness sheet according to any one of claims 1 to 4. The folding start point of the sheet is a depression at a position where the dimension L is away from the center position in the width direction, the inner side in the width direction of the adhesive application part is the front adhesive part, and the outer side is the rear adhesive part,
The other end in the width direction of the sheet placed on the wire harness is overlapped and adhered to the tip adhesive portion, and the portion sandwiching the wire harness in the state is further folded, and the outer surface of the folded portion is The exterior structure of the wire harness according to claim 5, wherein the rear adhesive portion is adhered.

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