JP2011205790A - Sheet and method for branch protection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branch protection sheet excellent in workability that can also accommodate T-shaped and X-shaped wire branches and with which branch binding work can be easily performed through a simple procedure.SOLUTION: The branch protection sheet 1 is obtained by forming slits 3, 3, ..., extended on diagonal lines from the corners of a square sheet body 2 with the central part of the sheet body 2 left and thereby forming four wrapping portions 5, 5, ..., separated from one another by the slits 3 and tied with one another at the central part in the sheet body 2. Binding is enabled by setting a wire branch on the branch protection sheet 1, wrapping the wrapping portions 5 around a main line portion and a branch portion, and fixing an end portion by a tape.

Description

  The present invention relates to a branch protection sheet for protecting a wire branch provided in an electric 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 folded surface formed between the slits is folded back in turn along the outer peripheral surface of the wire branching portion through another slit, 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. Further, the branch sheet is easily broken from the slit, and once used, the branch sheet cannot be reused.
Furthermore, since it can be applied only to the T-shaped electric wire branching portion and cannot be applied to the X-shaped electric wire branching portion, it is limited in use. Even for the T-shaped electric wire branching portion, the entire branching portion is wrapped so that the branching line is fixed and lacks flexibility after bundling, and it is not possible to cope with further drawing of the branching line.

  Therefore, the present invention can be applied to T-shaped and X-shaped wire branching portions and further to wire branching portions having branching wires, and can be easily bundled in a simple procedure and has excellent workability, and can be reused. An object of the present invention is to provide a branching part protective sheet and a branching part protecting method that can be obtained and that can be obtained after being bundled.

To achieve the above object, the invention described in claim 1 binds and protects a T-shaped or X-shaped electric wire branching portion comprising a main line portion and a branch portion that branches perpendicularly from the main line portion. For a branch part protective sheet for forming a slit on a diagonal line, leaving a central part of the sheet body from the respective corners on a square or quadrilateral sheet body, and separating the neighbors by slits on the sheet body Thus, four winding portions that are coupled to each other at the central portion are formed.
The invention described in claim 2 is characterized in that, in the configuration of claim 1, chamfering is formed at both ends of each winding portion sandwiching the slit at the corner portion.
According to a third aspect of the present invention, in the configuration of the first or second aspect, a hole having a diameter larger than the width of the slit is continuously provided at the end of the slit.
In order to achieve the above object, the invention described in claim 4 is a method for bundling and protecting a T-shaped electric wire branching portion comprising a main line portion and a branching portion branched perpendicularly from the main line portion. A pair of the main line part set on the branch part protective sheet according to any one of claims 1 to 3 in parallel with the side, the branch part protective sheet is folded in half so as to sandwich the main line part, and the branch part is sandwiched. Each of the winding portions is wound around the branch portion and the end portion is fixed with tape, while the other winding portion receiving the main portion is wound around the main portion and the end portion is fixed with tape.
In order to achieve the above object, the invention described in claim 5 is a method for bundling and protecting an X-shaped electric wire branching portion comprising a main line portion and two branch portions branching orthogonally from the main line portion. The electric wire branch portion is set on the branch portion protection sheet according to any one of claims 1 to 3 so that the main line portion and the branch portion are orthogonal to the sides of the branch portion protection sheet, and wound. The turning portion is wound around a main line portion or a branch portion located above, and the end portion is tape-fixed.
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 inventions of claims 1 and 4 and 5, it can be widely applied to T-shaped and X-shaped wire branching portions and wire branching portions having branching wires, and bundling work can be easily performed with a simple procedure. Excellent workability. Moreover, since the flexibility after bundling is also obtained, a wire harness can be packed easily. Furthermore, since the tape is partially fixed, the branch protection sheet can be reused.
According to invention of Claim 2, in addition to the effect of Claim 1, it becomes easy to recognize a winding part by chamfering, it is excellent in workability | operativity, and a chamfer is located in the edge part fixed to a tape. This makes it easier to wind the tape.
According to the third aspect of the invention, in addition to the effect of the first or second aspect, the sheet main body is hardly broken from the slit portion, and the durability is improved. Moreover, the winding operation of the winding part is also facilitated.

It is explanatory drawing of a branch part protection sheet. (A)-(C) are explanatory drawings of the branch part protection method with respect to a T-shaped electric wire branch part. It is explanatory drawing of the branch part protection method with respect to the electric wire branch part which has a branch line. (A) (B) is explanatory drawing of the branch part protection method with respect to a X-shaped electric wire branch part. It is explanatory drawing of the branch part protection method with respect to the electric wire branch part which has a branch line.

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 protection sheet (hereinafter simply referred to as “protection sheet”) 1 has a flexible square sheet body 2 made of an epoxy film, a polyimide film or the like, and has four corners. Four slits 3, 3... Are formed diagonally from the portion, leaving the central portion of the sheet body 2. A hole 4 having a diameter larger than the width of the slit 3 is connected to the end of each slit 3. The distance S between the centers of the two holes 4 and 4 aligned along the side of the sheet body 2 is set to 1/2 to 1/3 of the circumference of the main line portion of the electric wire branching portion described later.

By the four slits 3, four trapezoidal winding portions 5, 5... Are formed in the sheet body 2, which are separated from each other by the slits 3 and joined to each other at the center.
Further, at each corner of the sheet body 2, chamfers 6 are respectively formed at the ends of the winding parts 5 and 5 adjacent to each other with the slit 3 interposed therebetween. The width of the chamfer 6 is substantially the same as the width of an insulating tape described later.

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 branching portion 10 comprising a main line portion 11 and a branch portion 12 branched from the main line portion 11 in an orthogonal shape, the main line portion 11 is a protective sheet 1. Is set on the protective sheet 1 so as to be parallel to a pair of opposite sides at the approximate center and so that the branched portion 12 is orthogonal to the other sides adjacent to the pair of sides.

Next, as shown in FIG. 5B, the protective sheet 1 is folded in two toward the branching portion 12 side with the electric wire branching portion 10 interposed therebetween. As a result, the branch portion 12 is sandwiched between the pair of upper and lower winding portions 5, 5, and both ends of the main line portion 11 sandwiching the branch portion 12 are respectively covered with the other winding portions 5 in a U shape.
Then, as shown in FIG. 3C, a pair of winding portions 5 and 5 sandwiching the branch portion 12 are wound around the outer periphery of the branch portion 12 and the end portions are fixed with the insulating tape 7. Similarly, at both ends of the main line portion 11, the winding portion 5 covering the main line portion 11 is wound around the outer periphery of the main line portion 11 as it is, and then the end portions are fixed with the insulating tape 7. Therefore, the bundling of the electric wire branching portion 10 ends as shown in FIG.

In addition, when a branch line is further drawn out from the electric wire branch part 10, the branch line 13 is pulled out between the winding parts 5 and 5 wound around the main line part 11 and the branch part 12, as shown in FIG. Then, each winding part 5 may be taped in a state where the branch line 13 is avoided.
2 and 3, since the protective sheet 1 can be removed from the electric wire branching part 10 by peeling off the insulating tape 7 of each winding part 5, another protective sheet 1 is used again. The electric wire branch part 10 can be bound.

Next, a method for protecting the X-shaped electric wire branch using the protective sheet 1 will be described.
First, as shown in FIG. 4 (A), an X-shaped electric wire branch portion 20 comprising a main line portion 21 and two branch portions 22 and 22 that branch from the main line portion 21 orthogonally in the opposite direction. The electric wire branch portion 20 is set on the protective sheet 1 so that the center of the electric wire branch portion 20 is located at the center of the protective sheet 1 and the main line portion 21 and the branch portion 22 are orthogonal to the side of the protective sheet 1. As a result, the main line portion 21 and the branch portion 22 are positioned orthogonally on each winding portion 5.

In this state, as shown in FIG. 5B, if each winding portion 5 is wound around the main line portion 21 or the branch portion 22 positioned above and the end portion is fixed with the insulating tape 7, the wire branch portion 20 The unity ends.
In this case as well, when a branch line is further drawn out from the electric wire branch part 20, as shown in FIG. 5, the branch lines 23 are pulled out from between the winding parts 5 and the branch line 23 is avoided. Then, each winding part 5 may be tape-fixed.
Moreover, since the protective sheet 1 can be removed from the electric wire branching portion 20 by peeling off the insulating tape 7 of each winding portion 5, another electric wire branching portion 20 can be bound again using the protective sheet 1. .

  Thus, according to the protection sheet 1 and the branching portion protection method of the above embodiment, the slits 3, 3... Are formed diagonally on the square sheet body 2, leaving the central portion of the sheet body 2 from each corner. In the sheet body 2, four winding parts 5, 5... That are separated from each other by the slit 3 and joined to each other at the center part are formed, and each winding part 5 is connected to the main line parts 11, 21. In addition, by wrapping around the branch parts 12 and 22 and fixing them with tape, it is widely applicable to the wire branch parts 10 and 20 having the T-shaped and X-shaped wire branch parts 10 and 20 and the branch lines 13 and 23. It can be done easily with a simple procedure, and workability is excellent. Moreover, since the flexibility after bundling is also obtained, a wire harness can be packed easily. Furthermore, since the tape is partially fixed, the protective sheet 1 can be reused.

In particular, here, since the chamfers 6 are formed at both ends of each winding part 5 sandwiching the slit 3 at the corners of the sheet body 2, the winding part 5 can be easily recognized and the workability is further improved. Since the chamfer 6 is located at the end where the tape is fixed, the tape can be easily wound.
In addition, since the hole 4 having a diameter larger than the width of the slit 3 is continuously provided at the end of the slit 3, the sheet body 2 is hardly broken from the slit 3 portion, and durability is improved. Moreover, the winding operation of the winding part 5 is also facilitated.

The shape of the chamfer provided on the sheet main body is not limited to the above form, and may be inclined with respect to the side of the sheet main body, or the chamfer itself may be omitted. The same applies to the hole at the end of the slit, and an ellipse or an ellipse may be adopted, or the hole itself may be omitted.
Further, the protective sheet is not limited to a square, and can be similarly applied to a square.
Furthermore, also in the branching part protection method, the winding procedure of each winding part of the main line part and the branching part is not limited to the above form, and may be appropriately changed.

  1 .... Branch protection sheet 2 .... Sheet body 3 .... Slit 4 .... Hole 5 .... Wound part 6 .... Chamfering 7 ... Insulating tape 10,20 ... Wire branch 11, 21... Main line portion, 12, 22... Branch portion, 13, 23.

Claims (5)

A branch part protective sheet for bundling and protecting a T-shaped or X-shaped electric wire branch part composed of a main line part and a branch part branched orthogonally from the main line part,
In the square or quadrilateral sheet main body, a slit is formed on the diagonal line leaving the central part of the sheet main body from each corner, and the sheet main body is separated from each other by the slit and is mutually separated in the central part. A branch protective sheet characterized in that four winding parts to be joined are formed.   2. The branch portion protective sheet according to claim 1, wherein chamfers are formed at both ends of each of the winding portions sandwiching the slit at the corner portion.   The branch part protective sheet according to claim 1, wherein a hole having a diameter larger than the width of the slit is continuously provided at an end of the slit. 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 said main line part is set on a branch part protection sheet in any one of Claims 1 thru | or 3 in parallel with a side, The said branch part protection sheet is folded in half so that the said main line part may be pinched | interposed, and the said branch part A pair of the winding portions sandwiching each other is wound around the branch portion and the end portion is tape-fixed, while the other winding portions that receive the main line portion are wound around the main line portion and the end portion is tape-fixed. The branch part protection method characterized by this. A method for bundling and protecting an X-shaped electric wire branching portion comprising a main line portion and two branch portions branching orthogonally from the main line portion,
The electric wire branch part is set on the branch part protective sheet according to any one of claims 1 to 3 so that the main line part and the branch part are orthogonal to the sides of the branch part protective sheet, A method for protecting a branching portion, characterized in that the winding portion is wound around the main line portion or the branching portion located above and the end portion is fixed with tape.

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