JPH0937428A - Method for passing cables through bellows type grommet for wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for passing cables through a bellows type grommet for a wire harness capable of improving inserting and of preventing breakage to electric wires by a jig for enlarging the hole of the bellow type grommet. SOLUTION: This is related to a method for passing cables through a bellows type grommet 4, for which the hole is enlarged with an enlarging jig 5 on the outer periphery of non-taped section 3 formed to a predetermined length in the middle of a binding tape for half-lap winding on the outer periphery of a wire harness W/H. When a non-taped section 3 is bent, on the outer periphery of the non-taped section 3 of the wire harness W/H, a tentative tape 6 is roughly wound, a bellows type grommet with the hole enlarged with a jig 5 is inserted to the outer periphery of non-taped section 3, a jig 5 is shrunk and attached to the outer periphery of the tentative winding tape 6, thereafter, the jig 5 is pulled out in the length direction of wire harness along the outer periphery of the tentative winding tape 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working method of passing a bellows type grommet around the outer periphery of a wire harness, and more specifically, when the grommet is attached by a jig for expanding the diameter of the bellows type grommet and then the jig is removed. It is intended to prevent the electric wire from being damaged by being caught by the electric wire, and also to facilitate the threading workability.

[0002]

2. Description of the Related Art Generally, a wire harness W / H for an automobile is used.
As shown in FIG. 3 (A), the outer peripheries of a large number of electric wires 1 are bundled by, for example, half-wrapping (wrapping) with a binding tape 2, and the half-wrapped portion has poor flexibility. Can not bend freely. For this reason, for example, the wire harness W / H that is routed across the vehicle body and the door
Then, it is necessary to allow a part of the wire harness W / H to bend freely as the door is opened and closed.
As shown in (B), a tape non-winding section 3 having a predetermined length L is formed in the middle of the binding tape 2 so that the tape non-winding section 3 can be freely bent.

However, in the non-tape winding section 3 of the wire harness W / H, since the electric wire 1 is exposed between the vehicle body and the door, it is necessary to cover it with the bellows type grommet 4 for waterproofing and preventing damage. is there.

Therefore, a conical expansion / contraction diameter jig 5 divided into four as shown in FIGS. 4 and 5A is used.
As shown in FIG. 5B, the grommet 4 is fitted while being compressed in the axial direction, and each claw portion 5a of the jig 5 is fitted as shown in FIGS.
The inner circumference of the grommet 4 is expanded by expanding ~ 5d outwardly, and in this state, the grommet 4 is passed through the tape unwound section 3 of the wire harness W / H as shown in FIG. 5 (E). Then, the claw portions 5a to 5d of the jig 5 are reduced in diameter to bring the grommet 4 into contact with the outer circumference of the tape non-winding section 3, and then the jig 5 is moved along the outer circumference of the tape non-winding section 3. Is pulled out in the length direction of the wire harness W / H.

[0005]

However, the jig 5 is used.
When the claw portions 5a to 5d of No. 3 are inwardly reduced in diameter and brought into contact with the outer circumference of the tape non-winding section 3, since the electric wire 1 is exposed in the tape non-winding section 3, the claw section 5a of the jig 5 is There was a risk that the electric wire 1 would be caught in the parts 5d to 5d and that the electric wire 1 would be pulled when the jig 5 was removed and the electric wire 1 would be damaged. Further, when the electric wire 1 is bitten into the claw portions 5a to 5d of the jig 5, it is necessary to remove the bite, and the workability of passing the grommet 4 is poor.

The present invention has been made to solve the above problems, and provides a method for threading a bellows type grommet for a wire harness, which can prevent the electric wire from being damaged by a jig for expanding the bellows type grommet and improve the threading workability. It is intended to be provided.

[0007]

In order to achieve the above object, the present invention provides a tape unwound section having a predetermined length on a part of a wire harness in which a tape is wound around an outer circumference and bound in claim 1 according to the present invention. In the working method of passing the bellows type grommet whose inner circumference is expanded with a jig for expansion and contraction from the tip of the wire harness, and fitting the tape non-winding portion to the outside, A temporary winding tape that can be cut when the non-tape winding section is bent is roughly wound around the outer circumference, and a bellows type grommet whose inner circumference is enlarged by the jig is passed through the outer circumference of the non-tape winding section. Then, reduce the diameter of the jig to fit the grommet onto the non-tape winding section, and then remove the jig along the outer peripheral surface of the temporary winding tape in the length direction of the wire harness. Special There is provided a threading operations method of wire bellows type grommet harness to. The temporary winding tape is a vinyl chloride tape or a paper tape, and preferably has slits for cutting formed at regular intervals in the length direction. (Claim 2)

[0008]

According to the present invention, the temporary winding tape is roughly wound around the non-tape winding section of the wire harness, and the grommet whose inner circumference is expanded by the jig is passed through the outer circumference of the tape non-tapping section. When the diameter of the jig is reduced, the jig comes into contact with the outer circumference of the temporary winding tape. As a result, the electric wire is prevented from being caught in the jig, so that the electric wire can be prevented from being damaged, and the work of removing the electric wire from the jig is not required, so that the workability of inserting the grommet is improved.

Since the temporary winding tape can be cut when the non-tape winding section is bent, the tape can be cut by opening and closing the door after arranging the wire harness across the vehicle body and the door. The non-winding section is bent, the temporary winding tape is naturally cut, and thereafter, the tape non-winding section can be freely bent. The temporary winding tape may be a vinyl chloride tape or a paper tape, and the paper tape is easy to cut, but in the case of a vinyl chloride tape, if slits are formed at regular intervals in the length direction, Easy to cut.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail based on the illustrated embodiments. It should be noted that parts having the same configurations and functions as those of the prior art shown in FIG.

As shown in FIG. 1 (B), a non-tape winding section 3 formed with a predetermined length L in the middle of a binding tape 2 which is half-wrapped around the outer periphery of the wire harness W / H.
A thin temporary winding tape 6 is roughly wound around the outer periphery of the. The width of the temporary winding tape 6 is 19 times that of the bundling tape 2.
If it is mm, it is preferably about 5 to 10 mm, and the pitch of rough winding is appropriately about 20 to 30 mm.

The temporary winding tape 6 is naturally cut when the non-tape winding section 3 is bent. That is, by cutting the temporary winding tape 6, the non-tape winding section 3 becomes free so that traveling vibration and the like can be absorbed.

The temporary winding tape 6 is preferably a paper tape that can be easily cut. However, in the case of a vinyl chloride tape, as shown in FIG.
If the slits 6a, ..., 6a are formed in advance, the cutting becomes easy. As a method of forming the slit 6a,
As shown in FIGS. 2B and 2C, the slits 6a can be easily formed by making radial cuts on both end surfaces of the roll-shaped temporary winding tape 6 wound around the core material 7. it can.

As for the work of passing the bellows type grommet 4 around the outer circumference of the wire harness W / H, the grommet 4 is fitted into the expansion / contraction diameter jig 5 while axially compressing it as in the conventional case [see FIG. 5 (B)]. ], The inner circumference of the grommet 4 is expanded by expanding the diameter of each of the claw portions 5a to 5d of the jig 5 to the outside.
[See FIGS. 5C and 5D] In this state, the grommet 4 is passed through the non-tape winding section 3 of the wire harness W / H as shown in FIG. 1, and then the claw portions 5a to 5d of the jig 5 are attached. Reduce the diameter inward. At this time, the claw portions 5a to 5d of the jig 5 are moved to the outer circumference of the tape non-winding section 3, that is, the electric wire 1 as in the conventional case.
Of the temporary winding tape 6 in the non-tape winding section 3 is not contacted with the outer circumference of the tape.

Therefore, since the electric wire 1 is not caught in the claw portions 5a to 5d of the jig 5, the electric wire 1 can be prevented from being damaged, and the electric wire 1 is disengaged from the claw portions 5a to 5d of the jig 5. Since no work is required, the workability of passing the grommet 4 is improved. After that, the jig 5 is pulled out along the outer periphery of the temporary winding tape 6 in the length direction of the wire harness W / H, and the grommet 4 passed through the wire harness W / H is
As shown in FIG. 3A, the non-tape winding section 3 is covered.

When the wire harness W / H is installed over the vehicle body and the door and then the door is opened and closed, the non-tape winding section 3 covered with the grommet 4 is bent. Since the temporary winding tape 6 is naturally cut, and the non-tape winding section 3 is not restrained by the temporary winding tape 6 after the cutting, the temporary winding tape 6 can be freely bent. The cut temporary winding tape 6 is held in the grommet 4, but since it is flexible, it does not hinder the bending of the non-tape winding section 3.

[0017]

As is apparent from the above description, the method for threading the bellows type grommet of the present invention is such that the temporary winding tape is roughly wound around the non-tape winding section of the wire harness to form a jig. Since the electric wire does not bite, damage to the electric wire can be prevented, and the work of removing the electric wire from the jig is not required, so that the workability of inserting the grommet is improved.

The temporary winding tape can be cut when the non-tape winding section is bent. Therefore, after the wire harness is laid across the vehicle body and the door, the door is opened and closed to wind the tape. The blank section is bent, the temporary winding tape is naturally cut, and thereafter, the non-tape winding section can be flexed freely, so that the labor for cutting the temporary winding tape is unnecessary. If a slit is formed in the temporary winding tape, cutting will be easy.

[Brief description of drawings]

1A is a side sectional view of a grommet threading work structure of the present invention, and FIG. 1B is a side view of a wire harness before threading work.

2A is a front view of a tape, FIG. 2B is a side view of a roll-shaped tape, and FIG. 2C is a front view of FIG.

FIG. 3A is a side view of a wire harness through a grommet, and FIG. 3B is a side view of a conventional wire harness before a threading operation.

FIG. 4 is a perspective view of an expansion / contraction diameter jig.

5 (A), (B) and (C) are side views of a procedure for fitting a grommet into a jig and expanding the grommet.
(D) is a front sectional view of (C), and (E) is a side sectional view of a grommet threading work structure.

[Explanation of symbols]

 W / H wire harness 1 electric wire 2 bundling tape 3 tape no winding section 4 bellows type grommet 5 expansion / contraction diameter jig 6 temporary winding tape

Claims (2)

[Claims] 1. A bellows type grommet in which a tape non-winding section having a predetermined length is provided in a part of a wire harness in which a tape is wound around an outer circumference and bound, and an inner circumference is expanded by a expansion / contraction diameter jig. In a method of fitting the tape non-wound portion through the tip of the harness, the temporary winding tape that is cut around the outer circumference of the tape non-winding section of the wire harness when the tape non-winding section is bent Roughly winding, and passing the bellows type grommet whose inner circumference is expanded with the above jig to the outer circumference of the tape non-winding section, and then reducing the diameter of the jig to fit the grommet onto the non-tape winding section. Then, a method for threading a bellows type grommet for a wire harness, characterized in that the jig is removed along the outer peripheral surface of the temporary winding tape in the length direction of the wire harness. 2. The bellows type for wire harness according to claim 1, wherein the temporary winding tape is a vinyl chloride tape or a paper tape, and slits for cutting are formed at regular intervals in a length direction. Grommet through work method.