JP2921630B2 - Waterproofing method for wire harness with grommet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved waterproofing method for a wire harness with a grommet.

[0002]

2. Description of the Related Art In a conventional wire harness, for example, a grommet is attached to a harness provided from an engine room to a cowl side and an instrument panel to protect and fix an electric wire to a through portion of a dashboard. I have. The grommet is an extremely important part in terms of waterproofing and soundproofing. When the grommet is attached to a harness, a tape is indispensable for waterproofing.

FIG. 3 shows an attached state of a wire harness 3 between an engine room 1 and an instrument panel 2 of an automobile, and a grommet 5 penetrated to a dashboard 4 is mounted at one end. The tape winding (double winding) for waterproofing of the wire harness 3 usually needs to be performed to the front (engine side) from the uppermost point t in FIG. When the taping 6 such as a manufacturing sign and the exterior part 7 are attached to the double winding portion as shown in FIG. 4, the operations (f) and (f) are performed after the grommet is fixed in the operation (d) as shown in the flowchart of FIG. The troublesome work as in (g) remains.

Next, a method for waterproofing a wire harness (W / H) with a grommet will be described in detail with reference to FIGS. The conventional waterproofing method includes the following five steps A to E.

Step A is a basic operation step on a wiring jig plate. This is the work (a) of arranging the electric wires with terminals along a plurality of fork pins (not shown) erected beforehand on the wiring jig plate, and the electric wires with terminals 8 in all sections a 'in FIG. Primary taping operation for half-wrapping the tape 9 (hereinafter simply referred to as wrapping) (b), and attaching general exterior parts such as clips and wire protectors to sections other than a '(c) Contains. The fork pin has a known structure in which a plurality of fork-shaped locking claws are provided at the upper end of the pin, and these locking claws are used to connect the intermediate portion of the terminal-attached electric wire 8. At the same time, the connector housing at the end of the electric wire 8 is hooked. The wire harness 3 between the engine room 1 and the instrument panel 2 shown in FIG. 3 is usually composed of a large number of about 50 to 100 electric wires.

After the basic work process A is completed, the harness intermediate product is removed from the wiring jig plate, the intermediate product is moved to a grommet opening / closing device (not shown) having a known configuration, and the grommet mounting process of B is performed. to go into. Specifically, this is a work (d) in which the diameter of the grommet 5 is increased by an opening / closing claw of a grommet opening / closing device, and a harness is penetrated there.

Next, the harness on which the grommet 5 is mounted is moved to the finishing jig plate for finishing again, and the quasi-finishing process C is started. Specifically, a waterproof taping (e) in which a wrap is double-wrapped on the primary taping in the a 'section performed in the basic work process A, and the corrugated tube 10 is placed on the waterproof taping in the a' section. A corrugated tube mounting operation (f) for covering, and wrapping and sealing from above (f), and an operation (g) for attaching the exterior component 7 and the like to the sealed corrugated tube 10. The finishing jig plate used here is an expensive fixture in which a plurality of fork pins are erected in accordance with the route of the wire harness, similarly to the wiring jig plate, and the above-mentioned parts to be attached to some fork pins 7 and the like are locked in advance. The corrugated tube 10 has a single slit 10a in its entirety. The tube 10 is easily expanded by the split 10a, and the terminal-attached electric wire 8 is inserted therethrough. Also,
In the waterproof taping operation (e), waterproof taping by double wrap winding is performed between the tape winding portion 5b at the tip of the bellows 5a of the grommet 5 and the primary taping portion of the electric wire 8. Further, in the corrugated tube mounting work (f) in the semi-finish process C using the split 10a of the corrugated tube 10, a group of terminal-attached electric wires 8 'serving as branch portions is previously pulled out from the middle (section b' in FIG. 5). And c ').

Next, in order to move to the continuity check step D, the completed harness is moved from the semi-finish step C to a checker jig (not shown). Here, continuity check work (h)
To confirm the quality, and then enter the final finishing step E. In the final finishing step E, an external appearance check of the completed harness product (whether or not various exterior parts are damaged, etc.), a check operation such as stopping options, and a packing operation are performed.

[0009]

According to the above-mentioned prior art, the waterproof taping work (e) in the semi-finish process C is performed.
After that, considerable work such as the mounting work of the exterior parts 7 (g) in addition to the work of mounting the corrugated tube (f), which requires an expensive finishing jig plate separately from the wiring jig plate. In addition, there is a problem that the number of work steps after mounting the grommet is large. The present invention has been made in view of the above-described problems, and has been made in view of the fact that the operation of mounting an exterior component on a sealing tape of a corrugated tube can be performed in a basic operation process, thereby reducing the number of work steps in a semi-finish process. Another object of the present invention is to provide a waterproofing method that can reduce the use of expensive finishing jig plates and reduce the use of expensive finishing jig plates.

[0010]

In order to achieve the above-mentioned object, the present invention provides a primary taping in which a tape is wound half-wrapped around a wire harness, then attaches a grommet and continuously doubles the grommet from the grommet. In a method of waterproofing a wire harness with a grommet in which a waterproof tape is wound around a half-wrap and a corrugated tube is attached to a portion of the waterproof taping, the corrugated tube attached on the waterproof taping is not attached to an exterior component attachment area. Divided into areas, waterproofing of the exterior parts mounting area
Taping is performed before the grommet is mounted, and waterproof taping of a portion corresponding to a non-mounting area continuous with the grommet and mounting of the corrugated tube are performed after the grommet is mounted.

[0011]

According to the present invention, since the corrugated tube following the grommet mounting portion of the wire harness is divided into an external component mounting area and a non-mounting area, the external component mounting is performed in the basic work process using the wiring jig plate. Work can be performed consistently, and the semi-finish process requires only waterproof taping and installation of corrugated tubes on the remaining non-mounting area on a normal work board, streamlining work and abolishing the finishing jig plate Can reduce equipment costs.

[0012]

FIG. 1 is a side view of a main part of a wire harness with a grommet according to the method of the present invention, and FIG. 2 is a flow chart showing its working steps. explain. According to the method of the present invention, the basic work process A ', the grommet mounting process B, the semi-finish process C', the continuity check process D and the finish process E are performed in the same manner as in the prior art.
Although the process is included, since the corrugated tube is divided into the external component mounting area and the non-mounting area, the operation contents of the basic operation step A ′ and the semi-finish processing step C ′ can be largely changed. As shown in FIG. 1, the mounting area a of the corrugated tube 10 to be mounted following the grommet 5 is divided into an exterior part mounting area b and a non-mounting area c following the grommet 5, and two corresponding sections are provided. Corrugated tube 1
Use 0A and 10B. That is, 1
One corrugated tube 10 is used in a form divided into two corrugated tubes 10A and 10B.

Therefore, in the basic operation step A ', first, as in the conventional art, an operation (1) of arranging the electric wires 8 with terminals on a wiring jig plate provided with a plurality of fork pins, followed by an electric wire. A primary taping operation (2) by wrapping the tape 9 around the entire surface is performed. In the method of the present invention, after the primary taping operation (2), a waterproof taping operation (3) is performed by double wrapping the tape 9 in the exterior component mounting area b, and the corrugated tube 10A is immediately placed on that portion. After the mounting operation (4) is performed and the corrugated tube 10A is waterproofed by half-wrap winding, an exterior component mounting operation (5) for mounting the exterior component is performed. This exterior part mounting work (5) is the mounting of the taping 6 and the parts 7 such as the production signs in FIG. 4 showing a conventional example, and is omitted in FIG. If necessary after the exterior component mounting operation (5), a general exterior component mounting operation (6) is performed as in the conventional example.

In the waterproof taping operation (3) in the exterior component mounting area b, the tape 9 is extended and doubled as shown in the area d in order to complete the waterproofing process with the non-mounting area c. The wrap winding 9 'is preferred.
At the end of the corrugated tube 10A, similarly to the conventional example, the terminal-attached electric wires 8 'serving as branch portions are bent and drawn out.

After the basic operation step A 'is completed, in the grommet mounting step B, the operation (7) of expanding the diameter of the grommet 5 and penetrating the harness is the same as the conventional example.

The harness to which the grommet 5 has been attached is subjected to a semi-finishing process C ', so that a normal work table (not shown) is used.
Moved to In the semi-finish process C ', in the non-attachment area c where the corrugated tube is not yet attached, both ends straddle the double wrap winding 9' portion and the tape winding portion 5b of the bellows portion 5a of the grommet 5. So that they overlap
After performing the waterproof taping operation (8) using double wrapping of the tape 9, another mounting operation (9) of the corrugated tube 10 </ b> B is immediately performed on the portion, and the waterproof treatment of the tube 10 </ b> A is performed by half-wrapping. Apply.

Continuity check step D following semi-finish step C '
Check work (10) and check work (11) and packing work (12) for finishing options in finishing process E
Is the same as the conventional example shown in FIG. 6, and the description is omitted.

In the above configuration, the corrugated tube continuously mounted on the grommet 5 is attached to the exterior part mounting area b.
And the two non-attached areas c, 10A and 10B. As a result, in the basic work process A 'using the wiring jig plate, regarding the exterior component mounting area b, the wiring work (1) of the terminal-attached electric wire 8 and the primary taping work (2) are started. It is possible to consistently perform the waterproof taping operation (3), the mounting operation of the corrugated tube 10A (4), the external component mounting operation (5), and the general external component mounting operation (6). Then, in the semi-finishing process following the grommet mounting process B, only the waterproof taping (8) in the non-mounting area c and the mounting work (9) for the corrugated tube 10B remain, and an expensive finishing jig plate is prepared. There is no need to perform the work, and the work can be easily performed on a normal work board.

In the above, an example in which the group of terminal-attached electric wires 8 'serving as branch portions is drawn from between the exterior component mounting area b and the non-mounting area c, that is, between the corrugated tubes 10A and 10B has been described. It goes without saying that the corrugated tube 10A or 10B may be pulled out from the middle as shown in the conventional example.

[0020]

As described above, according to the present invention, the wire harness is subjected to the primary taping for half-wrapping the tape, the grommet is attached, and the half-wrap is continuously double-wrapped from the grommet. Waterproofing tape, and attaching a corrugated tube to the waterproof taping portion. A waterproofing method for a wire harness with a grommet, comprising:
Performed before mounting the grommet, the corrugated tube mounted on the waterproof taping is divided into an exterior component mounting area and a non-mounting area, and a portion of the waterproof taping and corrugated tube corresponding to the non-mounting area that is continuous with the grommet is provided. Since the mounting is performed after the grommet is mounted, it is possible to consistently perform the exterior component mounting work in the conventional basic work process using the wiring jig plate,
In the semi-finishing process, the remaining non-mounting area only needs to be waterproofed and the corrugated tube installed, which reduces the number of work steps and simplifies the work, making it easy to use on a normal work board. And equipment costs can be reduced by eliminating finishing jig plates. Also,
Since the exterior parts are mounted on the same wiring jig plate on which the electric wires are routed, the reliability of the mounting position and the directionality is improved.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a wire harness obtained by a method of the present invention, which is longitudinally sectioned.

FIG. 2 is a flowchart showing working steps of the method of the present invention.

FIG. 3 is an explanatory diagram showing a state in which a wire harness with a grommet is attached to a vehicle.

4 is an essential perspective view of the wire harness of FIG. 3;

FIG. 5 is a side view of a part of the wire harness of FIG.

FIG. 6 is a flowchart showing working steps of a conventional processing method.

[Explanation of symbols]

 Reference Signs List 3 wire harness 5 grommet 5a bellows part 7 exterior part 8 wire with terminal 9 tape 10 corrugated tube 10A corrugated tube 10B corrugated tube 10a crack

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hironori Nomura 21117-1, Nishikata, Niimi-shi, Okayama Prefecture Inside Yazaki Parts Co., Ltd. (72) Inventor Norimasa Watanabe 21117-1, Nishikata, Niimi-shi, Okayama Prefecture Yazaki Parts Co., Ltd. (56) References JP-A-7-105742 (JP, A) JP-A 4-47332 (JP, U) JP-A 55-45657 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02G 3/22-3/28

Claims (1)

(57) [Claims] 1. A wire harness is subjected to a primary taping in which a tape is half-wrapped, a grommet is attached, and a waterproof taping in which the grommet is continuously double-wrapped in a half-wrap is provided from the grommet. In a method for waterproofing a wire harness with a grommet, in which a corrugated tube is mounted on a part, a corrugated tube mounted on the waterproof taping is divided into an external component mounting area and a non-mounting area, and the waterproofing of the external component mounting area is performed.
A waterproofing method , wherein taping is performed before the grommet is mounted, and waterproof taping of a portion corresponding to a non-mounting area continuous with the grommet and mounting of the corrugated tube are performed after the grommet is mounted.