JPH07130233A - Structure and method for binding wire harness - Google Patents

Abstract

PURPOSE:To position a specific electric wire in the sectional center of a wire harness by securing a general electric wire to a sheet, spirally winding the sheet around the specific electric wire positioned it in the center part. CONSTITUTION:A specific electric wire W1 is arranged in one end on a thin thickness sheet 11 of polychloride vinyl and secured to an upper surface of the sheet. One end of the sheet is wound so as to surround the electric wire W1 by the sheet, to bond the fellow sheets. Next, a general electric wire W2, after it is arranged on the rest of the sheet, is wound in a spiral shape with a part, surround by the sheet, serving as the nucleus, and finally separating paper, previously pasted to the other end face of the sheet, is peeled off and bonded to the outermost peripheral surface. By this constitution, the specific electric wire W1 is surely positioned in the sectional center. Even when provided interference between the outside and the specific electric wire W1, a wire breaking is first generated in the general electric wire W2, and abnormality of wire harness can be detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binding structure for a wire harness including a specific electric wire and a method for binding the wire harness, and more particularly, to a specific electric wire capable of positioning and holding the specific electric wire at the center of the general electric wire. is there.

[0002]

2. Description of the Related Art Conventionally, a wire harness for a vehicle is shown in FIG.
As shown in FIG. 3, the wiring jig 2 is projected and attached at a required position on the upper surface of the wire harness assembly drawing board 1, and the required electric wire W is inserted into the electric wire insertion portion 2 a of these wiring jigs 2. In this state, while the electric wire group is being lifted from the electric wire insertion portion 2a, the outer peripheral surface of the electric wire group is wrapped and bound with a binding material such as tape 3.

[0003]

In the wire harness formed by bundling a large number of electric wires as described above, it is absolutely necessary to avoid short-circuiting with the vehicle body panel, for example, a battery to which a constant voltage is applied. It is preferable that the power supply line directly connected to the power supply line is located in the central part of the cross section and not in the outer peripheral part of the bundled electric wire group. That is, since a large amount of current is flowing through the power supply line, it is preferable to position the power supply line at a central position where disconnection is less likely to occur due to interference from a vehicle panel or the like.

However, in the conventional wire harness binding method shown in FIG. 3, the wire insertion portion 2 of the wire laying jig 2 is used.
With respect to a, a large number of electric wires W are randomly inserted from the upper end opening, and there is no means for positioning and holding the specific electric wire to be positioned at the center position of the power supply line or the like at the center of the electric wire group. When laying wires, it is only necessary for the worker to bundle them while positioning the specific wires in the center, but if you do not know which wire is the specific wire, you cannot position these specific wires in the center. Absent. On the other hand, when recognizing the specific electric wires and positioning the specific electric wires at the central position when binding them with the tape 3, since the number of the specific electric wires is usually plural, while positioning the plural specific electric wires at the center. It is not easy to unite.

Therefore, conventionally, as shown in FIG. 4, it is possible to surely solve the problem that the specific electric wire WS which is desired to be located at the center of the cross section of the wire harness is located at the outer peripheral portion of the wire harness. There wasn't.

To solve the above problem, a binding tool 4 dedicated to positioning the constant electric wire has been proposed as shown in FIG. (Actually open flat 1-122574) The above-mentioned binding tool 4 is provided with three projections 4b radially extending on the outer periphery of the substantially annular holding member 4a, and the holding member 4a accommodates the particular electric wire W-S with a specific electric wire. While the other electric wire W is arranged on the outer peripheral surface of the holding member 4a for the specific electric wire, the outer circumference of these electric wires to be bound is bound with the tape 3 to form a wire harness.

When the above-mentioned binding tool is used, a plurality of protrusions 4b
Since the tape 3 is wound around the outer peripheral surface of the wire harness, the outer diameter of the wire harness to be focused needs to correspond to the outer diameter of the binding tool 4. Therefore, there is a problem in that a large number of tying tools 4 that are separate parts must be prepared according to changes in the outer diameter of the wire harness. Further, since the holding member 4a has a large opening and is opened outward, the specific electric wire W
-S is more likely to come out than the holding member 4a and cannot be positioned and held in the center of the wire harness, and since there is no means for holding the electric wire W arranged on the outer circumference, when winding the tape to bundle the entire electric wire group. There is a problem that it takes time.

The present invention has been made in view of the above-mentioned problems, and in the electric wire group, a specific electric wire is located at the center of the cross section of the wire harness and can be easily bundled while being surrounded by other general electric wires. An object of the present invention is to provide a binding method and a binding structure for a wire harness bound by the method.

[0009]

That is, according to the present invention, a plurality of sheets, to which a general electric wire is fixed, are spirally wound around a specific electric wire located in a central portion, and the general electric wire and the sheet are provided around the specific electric wire. The present invention provides a bundling structure of a wire harness including a specific electric wire having a configuration in which the above are alternately laminated.

Further, according to the present invention, the specific electric wires are arranged on one end side of the upper surface of the sheet having the entire surface coated with the adhesive and fixed to the upper surface of the sheet, and then the end portion of the sheet is wound so as to cover the specific electric wires. , The end of the sheet is fixed to the upper surface of the sheet, the outer periphery of the specific electric wire is surrounded by the sheet, then the general electric wires are arranged in parallel on the remaining upper surface of the sheet and fixed to the upper surface of the sheet, and then the specific electric wire is covered. To provide a method for binding a wire harness including a specific electric wire that holds a wound state by winding the other end of the wound sheet in a spiral shape from the sheet end and sticking the other end of the sheet to the outermost peripheral surface. is there.

As the above-mentioned sheet, a sheet which is made of polyethylene or polyvinyl chloride and has a thickness of 0.01 to 0.7 mm and is thin and flexible is preferably used. Therefore, even if there is a gap between the specific electric wire or the general electric wire adhered on the sheet, the sheet can be mixed into the gap to eliminate the occurrence of the gap between the electric wires.

[0012]

In the binding method according to the present invention, the specific electric wires are arranged on one end side of the sheet and fixed to the upper surface of the sheet, and the one end side of the sheet is wound so that the specific electric wire is surrounded by the sheet and the sheets are adhered to each other. Then, after arranging the general electric wires on the remaining sheet, the specific electric wire is wound in a spiral shape with the portion surrounded by the sheet as a core, and finally, the release paper which is attached in advance to the other end surface of the sheet. It is only necessary to peel off and adhere the sheet to the outermost peripheral surface which is sprinkled.

In the wire harness bound as described above, the specific electric wire can be easily and surely positioned at the center of the cross section, and the general electric wire and the sheet are alternately laminated on the outer periphery of the specific electric wire. Therefore, the protective function of the specific electric wire is excellent. In other words, even if there is external interference, the specific electric wire cannot reach the specific electric wire unless it breaks through the multilayered sheet and the general electric wire.Therefore, the general electric wire must be disconnected before the specific electric wire is disconnected due to the external interference. Becomes
Therefore, before the disconnection of the specific electric wire occurs due to the disconnection of the general electric wire, it is possible to know the abnormality of the wire harness.

Further, the binding tool used is a commercially available sheet having one surface coated with an adhesive, and does not require a dedicated binding tool and can be implemented at low cost.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in FIGS. In the wire harness 10 shown in FIGS. 1A and 1B, W1 is a specific electric wire, W2 is a general electric wire, and 11 is a binding sheet, and the specific electric wire W1 is located at the center of the cross section of the wire harness 10 and its outer periphery. In addition, the general electric wire W2 is spirally wound on the sheet 11 while being fixed to the sheet 11 without a gap. That is, the outer periphery of the specific electric wire W1 is alternately laminated and surrounded by the sheet 11 and the general electric wire W2 so that the specific electric wire W1 is protected.

The sheet 11 is made of polyethylene or polyvinyl chloride. The polyethylene sheet has a wall thickness of 0.01 to 0.03 mm, and the polyvinyl chloride sheet has a wall thickness of 0.3 to 0.7 mm. All sheets have flexibility. It is difficult to wind a thin polyethylene sheet, but there is an advantage that the diameter of the wire harness does not increase and when a gap is generated between the electric wires, it enters the gap and eliminates the gap. On the other hand, the polyvinyl chloride sheet has an advantage that the diameter of the wire harness is increased, but it is easy to wind and has a large protection function for the specific electric wire.
Therefore, it is appropriately selected and used according to the type of wire harness.

The sheet 11 has a rectangular shape, and the adhesive 12 is applied to the entire one surface (the upper surface in FIG. 2). The general electric wires W2 are fixed side by side on the sheet 11 without any gap, and in principle, the general electric wires W2 are fixed on the upper surface of the sheet 11 in a line without overlapping. In the case of a small-diameter electric wire, two electric wires may overlap and a part of each electric wire may be fixed to the adhesive 12 of the sheet 11.
Further, as shown in FIG. 2, a release paper 14 is attached to the sheet 11 along one edge thereof, and the release paper 14 is released when attached to the electric wire shown in FIG. The sheets 11 are fixed to each other with an adhesive 12 in order to maintain the winding state of the sheet 11.

A method of binding the wire harness having the structure shown in FIG. 1 will be described with reference to FIG. First, the specific electric wire W1 and the general electric wire W2 are inserted at random from the upper end opening into the electric wire insertion portion 2a of the wiring jig 2 protruding from the wiring drawing board (not shown). Then, as shown in FIG. 2A, the specific electric wire W1 is separated from the electric wire group held by the wiring jigs 2 on both sides and loosened between the wiring jigs 2 to the side. Pull out to. The specific electric wire W1 can be easily separated from the general electric wire W2 by roughly winding the specific electric wire with tape or partially fixing it before the wiring.

Between the wire arranging jigs 2 on both sides, the sheet 11 is placed on the seat base 22 installed below the wire arranging position of the electric wire.
With the adhesive 12 facing upward, and the side of the sheet 11 on which the release paper 14 is not attached is placed as the side of the specific electric wire W1 pulled out to the side. The specific electric wires W1 are pressed side by side on the upper surface of the sheet 11 with no space therebetween, and the specific electric wires W1 are fixed to the sheet 11 with the adhesive 12.

Then, as shown in FIG. 2B, one end 11a of the sheet 11 is wrapped around the specific electric wire W1 so that the one end 11a of the sheet 11 is adhered to the adhesive 1 of the sheet 11.
Press it against 2 and fix them together. In this state, the specific electric wire W2 is positioned and held in a state where the outer periphery is completely surrounded by the tubular sheet 11.

After that, all the general electric wires W2 are lined up in a line on the remaining upper surface of the sheet 11 without gaps, and the respective general electric wires W2 are fixed to the sheet by the adhesive 12. At this time, when the general electric wires W2 are overlapped with each other, they may not be fixed by the adhesive 12. Therefore, the electric wires W2 are arranged in a line as much as possible.
In the case of small-diameter electric wires, they may be overlapped and a part of them may be fixed by the adhesive 12.

After that, as shown in FIG. 2C, the sheet 1 is formed by using the bundle of the specific electric wires W1 wound around the sheet 11 as a core.
The remaining sheet 11 on which the general electric wires W2 are arranged side by side is wound in a spiral shape with the adhesive 12 side of No. 1 inside. At that time, the general electric wire W1 is strongly wound so as to come into pressure contact with the inner peripheral sheet 11 so that no gap is generated.
When the sheet 11 is completely wound, the release paper 14 is peeled off and the sheet winding end is fixed to the outer peripheral surface of the wound sheet with the adhesive 12, and the sheet 11 is fixed in the wound state.

[0023]

As is apparent from the above description, according to the binding method of the present invention, the specific electric wire such as the power supply wire is surely positioned at the center of the cross section of the wire harness, and its outer circumference is formed by the general electric wire and the sheet. It can be stacked and enclosed. Therefore,
In the binding structure of the present invention, the protective function of the specific electric wire is high, and even if the external member interferes with the wire harness, first, the outer peripheral side sheet → general electric wire → sheet → general electric wire ... Is protected. In addition, it is easy to find the damage before the specific wire is broken due to the damage or breakage of the general electric wire.

Further, in the binding method of the present invention, the sheets are completely wrapped around the outer periphery of the specific electric wire, and in this state, the sheets are adhered to each other so that the specific electric wire is hermetically sealed inside the tubular sheet. The specific electric wire does not spill to the general electric wire side, and is reliably positioned and held at the center of the cross section of the wire harness.

Further, according to the present invention, since the electric wires are simply arranged on the sheet and the sheet is wound, the binding work can be performed very easily, and the workability is good. And, even if the outer diameter of the specific electric wire portion to be focused differs depending on the diameter of the specific electric wire and the number of the specific electric wires, only by winding the sheet, it is possible to cope with the difference in the outer diameter,
Similarly, even if the number of general electric wires is different, it can be dealt with because only the sheet is wound. Moreover, as the sheet having an adhesive applied to one surface to be used, a commercially available sheet can be used, and therefore, there is an advantage that it is not necessary to use a special binding tool and can be carried out at a low cost.

[Brief description of drawings]

FIG. 1 shows a wire harness using a binding tool of the present invention, (A) is a perspective view, and (B) is a sectional view taken along line XX ′.

2A to 2C are process diagrams showing the wiring method of the present invention.

FIG. 3 is a perspective view showing a conventional wiring method.

FIG. 4 is a sectional view of a wire harness showing a conventional problem.

FIG. 5 is a cross-sectional view showing a conventional binding tool.

[Explanation of symbols]

 10 Wire Harness 11 Sheet 12 Adhesive 14 Release Paper W1 Specified Electric Wire W2 General Electric Wire

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H02G 3/04 J 9175-5G

Claims (2)

[Claims] 1. Around a specific electric wire to be positioned at the center,
Sheets with general electric wires fixed are wound in multiple spirals,
A binding structure of a wire harness including a specific electric wire, in which a general electric wire and a sheet are alternately laminated on the outer periphery of the specific electric wire. 2. A specific electric wire is arranged and fixed to the upper surface of the sheet on one end side of the upper surface of the sheet having an adhesive applied to the entire upper surface, and a sheet end is wound so as to cover the specific electric wire. Part to the upper surface of the seat, enclose the outer circumference of the specific electric wire with a sheet, and then arrange the general electric wires in parallel on the rest of the upper surface of the sheet and fix them to the upper surface of the seat, and then from the end of the sheet covering the specific electric wire. A method of binding a wire harness including a specific electric wire that holds a wound state by adhering the outermost peripheral sheet to the other end of the spirally wound and wound sheet.