JP5607396B2 - Branch protection sheet and branch protection method - Google Patents

Description

  The present invention relates to a branch protection sheet for protecting a T-shaped wire branch provided in a wire bundle such as a wire harness for automobiles, and a branch protection method using the branch protection sheet.

  An electric wire bundle such as a wire harness may be provided with an electric wire branching portion in which a part of electric wires branch in a T shape from a predetermined position. The wire branch portion needs to be bound and protected by, for example, winding an insulating tape, but the binding work is troublesome and causes variations in the work. Therefore, as disclosed in Patent Document 1, a branch sheet is devised in which a slit is formed in a rectangular sheet having flexibility by applying an adhesive to the surface and orthogonal to each side. After covering the wire branching portion with the branch sheet, the folding surface formed between the slits is folded in turn along the outer peripheral surface of the wire branching portion through other slits, thereby allowing the wire branching portion to be bundled. Is.

Japanese Patent Laid-Open No. 9-117034

In the above branch sheet, the adhesive is applied to the entire surface, and the folded surface is bonded through another slit when binding, so the procedure is wrong or the folded surfaces are self-aligned when binding It takes time and labor to bond and peel off.
Moreover, since positioning with respect to the electric wire branch part is difficult, unevenness is likely to occur in the winding amount of each folded surface, and the appearance may be deteriorated.

  Therefore, the present invention has an object to provide a branch protection sheet and a branch protection method that can easily perform a bundling operation with a simple procedure, have good variability in bundling, have good appearance, and are excellent in workability and reliability. It is a thing.

In order to achieve the above object, the invention according to claim 1 is directed to a branch portion for bundling and protecting a T-shaped electric wire branch portion comprising a main line portion and a branch portion that branches perpendicularly from the main line portion. It is a protective sheet, and a left or right pair of lateral slits that separate the sheet body into upper and lower lap parts are formed on the square or quadrangle sheet body, leaving the center part, and the left and right direction of either the upper or lower wrap part At the center of the side, a pair of vertical slits that are perpendicular to the horizontal slit and have an interval equal to or smaller than the width of the branching portion are formed, leaving the central part, and along the side that is orthogonal to the vertical slit in one lap part In addition, an adhesive surface having a width smaller than the length of the vertical slit is provided, and an adhesive surface having a width smaller than the length of the horizontal slit is provided along both sides orthogonal to the horizontal slit in the other wrap portion of the sheet body . Specially It is an.
In order to achieve the above object, the invention described in claim 2 is a method for bundling and protecting a T-shaped electric wire branching portion comprising a main line portion and a branching portion that branches perpendicularly from the main line portion. The main line part is set along the horizontal slit in one lap part on the branch part protective sheet according to claim 1, and the branch part is passed to the other wrap so as to pass between the horizontal slits on the extension of the vertical slit. Wrap the other wrap part around the branch part from the left and right direction and fix it using the adhesive surface, while wrapping one wrap part around the main line part from the top and bottom direction and fix it using the adhesive surface It is characterized by this.
The “orthogonal shape” of the electric wire branching portion includes not only strict orthogonality but also includes substantially orthogonality in which the branching portion is slightly inclined with respect to the main line portion.

According to the first and second aspects of the invention, the bundling work of the electric wire branching portion can be easily performed with a simple procedure, and there is no variation in the bundling and the appearance is good. Therefore, it becomes excellent in workability and reliability related to bundling of the wire branch portions.
In particular, since a pair of vertical slits orthogonal to the horizontal slits are formed at intervals equal to or less than the width of the branch portion, when the wrap portion formed between the vertical slits is wound around the wire branch portion and bonded, the wrap The part is deformed according to the surface of the branch part, and is adhered with a good appearance. Moreover, also when pulling out an electric wire from an electric wire branch part, it can pull out easily from the lap | wrap part between vertical slits.
And since the adhesive surface is provided along both sides orthogonal to the horizontal slit in the other lap part, one adhesive surface can be used for temporary fixing, and there is no risk of shifting or loosening during binding. Is better.

It is explanatory drawing of a branch part protection sheet. (A)-(F) are explanatory drawings of a branch part protection method. It is explanatory drawing of the example of a change of a branch part protection sheet.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
An example of a branch part protection sheet is shown in FIG. This branch part protective sheet (hereinafter simply referred to as “protective sheet”) 1 has a flexible square sheet body 2 made of an epoxy film, a polyimide film or the like, and is located in the middle of the sheet body 2 in the vertical direction. Is formed with a pair of lateral slits 3 and 3 orthogonally extending from the left and right sides, leaving a predetermined interval (for example, 20 to 25 mm) between the ends at the center of the sheet body 2.
Further, a pair of the lower part of the sheet body 2 separated vertically by the horizontal slits 3 and 3 is orthogonal to the center of the lower side at an interval equal to or less than the width of the branching part 22 of the electric wire branching part 20 described later. The vertical slits 4 and 4 are formed in such a length as to reach the substantially middle position of the lower portion, leaving the central portion of the sheet body 2.

Further, on the left side adjacent to the horizontal slit 3 in the upper part of the sheet body 2, an adhesive surface 5 made of double-sided tape is formed in the vertical direction with a predetermined width, while the lower part of the sheet body 2 Also on the lower side, an adhesive surface 6 made of double-sided tape is formed in a lateral direction excluding the vertical slit 4 with a predetermined width.
Thus, the protective sheet 1 is formed with an upper wrap portion 7 on the upper portion of the horizontal slits 3 and 3, while a lower wrap portion 8 is formed on the lower portion of the horizontal slits 3 and 3, and further lower wrap The portion 8 is separated into a left lower wrap portion 9 at the left end, a right lower wrap portion 10 at the right end, and a middle lower wrap portion 10 at the center by the vertical slits 4 and 4.

A method for protecting the T-shaped wire branch portion in the wire harness using the protective sheet 1 configured as described above will be described.
First, as shown in FIG. 2 (A), a T-shaped electric wire branch portion 20 composed of a main line portion 21 and a branch portion 22 that branches perpendicularly from the main line portion 21 is arranged with the branch portion 22 facing upward. In the inverted T-shape, the main line portion 21 is positioned along the horizontal slits 3 and 3 on the lower lap portion 8, and the branch portion 22 is between the horizontal slits 3 and 3 on the extension of the vertical slits 4 and 4. It is set on the protective sheet 1 so as to be positioned on the upper lap portion 7 so as to pass therethrough. At this time, the branch portion 22 is easily positioned by the vertical slits 4, 4 positioned below the branch portion 22.

  Next, as shown by the arrow in FIG. 2A, after winding the right side of the upper lap portion 7 not having the adhesive surface 5 around the branch portion 22, the left side of the upper lap portion 7 is wound from above. It is fixed by the adhesive surface 5. Then, the branch portion 22 is wrapped by the upper wrap portion 7 as shown in FIG.

  Subsequently, when the lower left wrap portion 9 is wound around the left side of the main line portion 21 from below and fixed by the adhesive surface 6, the left side of the main line portion 21 is wrapped by the lower left wrap portion 9 as shown in FIG. Thereafter, when the lower right wrap portion 10 is wound around the right side of the main line portion 21 from below and fixed by the adhesive surface 6, the right side of the main line portion 21 is wrapped by the lower right wrap portion 10 as shown in FIG. .

Then, the remaining small and medium wrap portions 11 are hung from the main line portion 21 to the branch portion 22 and wound from below, and fixed by the adhesive surface 6. Then, as shown to the same figure (E), the whole electric wire branch part 20 is wrapped by the protection sheet 1. FIG. Finally, when the entire protective sheet 1 is wound with the insulating tape 12, the bundling of the electric wire branch portion 20 is completed as shown in FIG.
In addition, when pulling out one or more electric wires from the electric wire branching portion 20, it can be pulled out from the winding portion of the small and medium wrap portion 11 from between the left and right lower wrap portions 8 and 9.

  Thus, the protective sheet 1 of the above embodiment forms a pair of left and right lateral slits 3 and 3 for separating the sheet body 2 into the upper and lower wrap parts 7 and 8 leaving the center part in the square sheet body 2, A pair of vertical slits 4, 4 that are perpendicular to the horizontal slits 3, 3 are formed at the center of the lateral side of the lower wrap portion 8 with a distance equal to or smaller than the width of the branch portion 22, leaving the central portion. Adhesive surfaces 5 and 6 are provided along the side perpendicular to the vertical slits 4 and 4 in the lower wrap part 8 and the side perpendicular to the horizontal slits 3 and 3 in the upper wrap part 7, respectively.

  And the branch part protection method of the said form sets the main line part 21 along the horizontal slits 3 and 3 in the lower lap | wrap part 8 of the protection sheet 1, and is horizontal slits 3 and 3 on the extension of the vertical slits 4 and 4 The branch portion 22 is set on the upper wrap portion 7 so as to pass between the two, and the branch portion 22 is wound from the left and right directions by the upper wrap portion 7 and fixed using the adhesive surface 5, while the main line is formed by the lower wrap portion 8. The portion 21 is wound from above and below and fixed using the adhesive surface 6.

Therefore, according to the protection sheet 1 and the branching portion protection method of the above embodiment, the bundling operation of the wire branching portion 20 can be easily performed with a simple procedure, the binding does not vary, and the appearance is good. It will be excellent in workability and reliability.
In particular, in the protective sheet 1, the longitudinal slits 4, 4 are formed at intervals equal to or smaller than the width of the branch portion 22, so that the middle / lower wrap portion 11 is wound when the middle / lower wrap portion 11 is wound around and bonded to the wire branch portion 20. Is deformed in conformity with the surface of the branching portion 22 and adhered with a good appearance.

In addition, in the said form, although the procedure which sets an electric wire branch part in a reverse T-shape and bundles is demonstrated, the same procedure will be carried out even if a protective sheet is turned upside down and an electric wire branch part is set in a T-shape It becomes. Further, the winding order of the upper wrap portion and the lower wrap portion may be changed as appropriate.
Further, the interval between the horizontal slits may be set to the diameter of the branching portion to be bound, but it is desirable to set it according to the assumed minimum diameter of the branching portion so that the parts having different diameters can be bound. . The same applies to the end position of the vertical slit. The distance from the horizontal slit may be set to the diameter of the main line part to be bound, but is preferably set according to the assumed minimum diameter of the main line part.
In addition, the protective sheet is not limited to a square but can be similarly applied to a square.

On the other hand, in the above embodiment, the adhesive surface is provided only on one side of the upper wrap portion of the sheet body, but the adhesive surfaces 5 and 5 may be provided on both sides of the upper wrap portion 7 as shown in FIG. Good. If provided on both sides in this way, one adhesive surface can be used for temporary fixing, and there is no possibility that the upper lap portion 7 will be displaced or loosened during binding, and workability will be improved.
In addition to using a double-sided tape, the adhesive surface may be formed by using a hook-and-loop fastener or by applying an adhesive to the side when binding.

  1 .... Branch protection sheet, 2 .... Sheet body, 3 .... Horizontal slit, 4 .... Vertical slit, 5,6 ... Adhesive surface, 7 .... Upper wrap, 8 .... Lower wrap, 9. -Lower left wrap part, 10-Right lower wrap part, 11-Middle lower wrap part, 12-Insulating tape, 20-Electric wire branch part, 21-Main line part, 22-Branch part.

Claims (2)

A branch part protective sheet for bundling and protecting a T-shaped electric wire branch part composed of a main line part and a branch part branched orthogonally from the main line part,
A square or quadrilateral sheet body is formed with a pair of left and right lateral slits that separates the sheet body into upper and lower wrap parts, leaving the center part, and at the center of the lateral side of either the upper or lower wrap part. , Forming a pair of vertical slits perpendicular to the horizontal slits with an interval equal to or less than the width of the branch part, leaving the central part,
Both sides perpendicular to the horizontal slit in the other wrap portion of the sheet body are provided along a side perpendicular to the vertical slit in the one wrap portion, and an adhesive surface having a width smaller than the length of the vertical slit is provided. A branch part protective sheet comprising an adhesive surface having a width smaller than the length of the lateral slit along the side . A method for bundling and protecting a T-shaped electric wire branching portion comprising a main line portion and a branch portion that branches perpendicularly from the main line portion,
The main line portion is set along the horizontal slit on the one wrap portion on the branch portion protection sheet according to claim 1, and the branch is passed between the horizontal slits on an extension of the vertical slit. A portion is set on the other wrap portion, and the other wrap portion is wound around the branch portion from the left and right direction and fixed using the adhesive surface, while the one wrap portion is vertically aligned with the main line portion. The method for protecting a branching portion is characterized in that it is wound around and fixed using the adhesive surface.

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