JP2000102148A - Method of arranging wire harness in automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To see that a wire harness and a connector at a terminal are not caught therebetween when mounting a fuel tank to the panel of the car body. SOLUTION: A hard tube 11 is attached outside from the terminal of a wire harness W/H, also an L-shaped guide plate 10 is attached at a distance S being a required interval, and the above section at the distance S is made a bendable part K, whereby a connector 17 can be temporarily placed on the topside of the car body floor 3 easily through a work hole 3c, locking the wire harness W/H to the floor 3 of the car body. In this condition, the wire harness W/H prevents the droop by the hard tube 11, so it does not interfere with a fuel tank, either, and dissolves the catch, too.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of wiring a wire harness in a motor vehicle, and more particularly, to a method of mounting a fuel tank on a vehicle body floor in a vehicle assembling process by improving a terminal portion and a wiring method of the wire harness. , And the connector and the wire harness are prevented from being caught between the vehicle body floor and the fuel tank.

[0002]

2. Description of the Related Art A fuel tank of an automobile is equipped with a fuel sensor for detecting the amount of fuel. In some cases, a wire harness is provided on the lower surface of a vehicle body floor and connected to the sensor from the upper surface of the fuel tank. In this case, when the fuel tank is mounted on the vehicle body floor in the vehicle assembling process, the wire harness routed on the lower surface of the floor hangs down due to its own weight. In some cases.

FIG. 6A shows a vehicle body floor 3 in the vicinity of a conventional fuel tank mounting portion. The wire harness W / H, which is routed through the grommet 5 to the underside of the vehicle body floor on the outside of the vehicle 1, has a corrugated tube as a protective material and connects the connector 7 to a terminal. The wire harness W / H is locked by a clamp 6 having a band by a reinforcing frame 3 a protruding from the lower surface of the vehicle body floor 3.

[0006] FIG. 6B shows a state in which the fuel tank 4 is connected to the vehicle body floor 3.
The terminal portion of the wire harness W / H and the connector 7 hang down due to their own weight, so that the terminal portion between the vehicle body floor 3 and the upper surface of the fuel tank 4
The connector 7 is sandwiched.

FIG. 7 (A) shows another conventional example, in which a work hole 3 for a connector connection work is formed in a vehicle body floor 3.
The terminal portion of the wire harness W / H is routed inside the vehicle 2 through C, and the connector 7 is temporarily placed on the upper surface of the vehicle body floor 3 so that the connector 7 does not hang down.

[0006]

As described above, even if the connector 7 is temporarily placed on the upper surface of the vehicle body floor 3, the wire harness W / H is bent by its own weight because the rigidity of the corrugated tube of the protective material is weak. As shown in FIG. 7B, there is a problem that the wire harness W / H is sandwiched between the vehicle body floor 3 and the upper surface of the fuel tank 4 when the fuel tank 4 is mounted, as shown in FIG. . At this time, if it is pinched tightly, the wire harness W / H
Corrugated tube and wire harness W
/ H may be damaged.

On the other hand, when the connector 7 is not temporarily placed on the upper surface of the vehicle body floor 3 as shown in FIGS. 6A and 6B, the connector 7 is sandwiched between the vehicle body floor 3 and the upper surface of the fuel tank 4. Therefore, there is a problem that the connector 7 may be damaged.

[0008] The present invention has been made in view of the above problems, and by increasing the rigidity near the end of the wire harness, even when the connector is temporarily placed, the wire harness W / H.
It is an object of the present invention to prevent the connector and the wire harness from being caught between the vehicle body floor and the fuel tank.

[0009]

To solve the above-mentioned problems, a method of arranging a wire harness connected to a sensor of a fuel tank mounted on a lower surface of a vehicle body floor, comprising a terminal connected to a connector of the wire harness. A hard tube having a required length is provided, and an L-shaped guide plate having a clamp protruding from the hard tube external position is attached to a wire harness, and the hard tube and the guide plate are bent. As a possible part,
An L-shaped guide plate attached to the wire harness is provided along a reinforcing frame protruding from the lower surface of the vehicle body floor at the fuel tank mounting position, and a clamp protruding from the guide plate is attached to the reinforcing frame. The connector of the wire harness terminal extending from the guide plate can be temporarily placed on the upper surface of the vehicle body floor through a work hole drilled in the vehicle body floor, and the wire harness can be hard tubing. After the fuel tank is fixed to the lower surface of the vehicle body floor, the bendable portion between the guide plate and the hard tube of the wire harness is bent so that the wire harness terminal is bent from the vehicle body upper surface. Take out the connector through the work hole to the lower surface of the vehicle body floor and connect it to the connector of the fuel sensor of the above fuel tank. It provides a routing method of a wire harness in an automobile that are.

[0010] By adopting the above method, the rigidity of the terminal portion of the wire harness is increased by coating the hard tube on the end side of the wire harness, the wiring direction is regulated upward by the guide plate, and the hanging down of the wire harness is eliminated. it can. On the other hand, since the bendable portion is provided between the hard tube and the guide plate, the terminal portion of the wire harness can be temporarily placed inside the vehicle through the work hole or moved in a required direction.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a wire harness W / H arranged on the lower surface of a vehicle body floor. As in the conventional case, a corrugated tube 20 is provided over the entire length, and a connector 17 for connection to a fuel gauge sensor is provided at a terminal. Connected. On the other hand, from the end of the wire harness W / H to which the connector 17 is connected, the hard tube 1 shown in FIG.
3 and at the required distance S,
The guide plate 10 shown in FIG.

The hard tube 11 shown in FIG. 2A is often formed of resin and has sufficient strength to maintain the wire harness W / H on a straight line. The inner diameter of the hard tube 11 is large enough to fit outside the wire harness W / H with the corrugated tube 20 being covered, and the length of the hard tube 11 is sufficient to cover a portion where the wire harness W / H hangs down. Is assured.
The hard tube 11 has a slit 11a in the axial direction continuously from one end to the other end. When the hard tube 11 is packaged in the wire harness W / H, the slit 11a is connected to the wire harness W / H.
The wire harness W / H is spread over the outside diameter, and the tape 8 is wound around both ends and fixed.

The hard tube 11 has a slit 11a.
In some cases, the hard tube 11 is not connected to the wire harness W / H before the connector 17 is connected.
Is externally fitted, and both ends are fixed by tape winding, and then the connector 17 is connected to the end of the wire harness W / H.

In place of the hard tube 11, FIG.
The reinforcing plate 12 shown in FIG.
Is usually made of resin and has sufficient strength to regulate the wire harness W / H on a straight line. Wire harness W /
H is attached to the terminal portion in such a manner that it is aligned with the axial direction of the wire harness W / H, and both ends are taped and fixed.

On the other hand, an L-shaped guide plate 10 shown in FIG.
Is usually formed of resin, has sufficient strength to regulate the direction of the wire harness W / H, and has a width suitable for the diameter of the wire harness W / H to be attached.
The lengths of the L-shaped horizontal portion 10a and vertical portion 10b are set in consideration of the shape and dimensions of the reinforcing frame 3a of the vehicle body floor 3 to be mounted. In addition, a clamp 10c is protruded from the upper surface of the horizontal portion 10a, and the band 1 is
0d is extended. Attachment to the wire harness W / H is performed by locking the band 10d around the wire harness W / H around the wire harness W / H.
Is fixed by winding.

The guide plate 10 may be separated into a clamp having a band and a guide plate.
After fixing both ends of the guide plate to the wire harness by tape winding, the clamp may be attached to the wire harness by winding the band together with the guide plate and the wire harness so that the clamp is on the upper side.

As shown in FIG. 1, the hard tube 11 and the guide plate 10 are attached to the wire harness W / H at an interval of a distance S, and the portion of the distance S is defined as a bendable portion K. I have. Since the bendable portion K is located only on the exterior of the corrugated tube 20, the wire harness W /
H can be bent freely at the bendable portion K, and the terminal portion of the wire harness W / H such as the connector 17 is bent at the bendable portion K.
Can move in any direction with the fulcrum as a fulcrum. In addition,
The distance S of the bendable portion K is determined by the wire harness W /
The dimensions of the wire harness W / H are appropriately set according to the diameter of the wire H so that the wire harness W / H can be bent freely.

FIG. 4 shows a state in which the wire harness W / H to which the hard tube 11 and the like are attached is locked and routed on the vehicle body floor 3, and from the indoor side 2 to the outdoor side 1 through the grommet 5. The protruding wire harness W / H is routed on the lower surface of the vehicle body floor 3. Next, the guide plate 10 extends along the reinforcing frame 3a protruding from the lower surface of the vehicle body floor, and the clamp 10c of the guide plate 10 is inserted into the clamp hole 3b of the reinforcing frame 3a.
/ H is locked to the vehicle body floor 3. By doing as above, the end side of the wire harness W / H is routed vertically upward.

Next, the guide plate 1 of the wire harness W / H
The connector 17 of the terminal extending from 0 is passed through a work hole 3 c formed in the vehicle body floor 3 and temporarily placed on the upper surface of the vehicle body floor 3. At this time, since the wiring direction of the connector 17 of the terminal of the wire harness W / H is regulated upward by the guide plate 10 and the connector 17 can move freely with the bendable portion K as a fulcrum, the connector 17 can easily be temporarily moved through the working hole 3c. Can be placed.

Further, in the above-mentioned temporary placement state, the guide plate 10
The wiring direction is regulated upward by the wire harness W / H due to the rigidity of the hard tube 11.
Does not sag and does not interfere at all with the mounting position of the fuel tank shown by the two-dot chain line in FIG.

Thereafter, as shown in FIG.
Is fixed to the vehicle body floor 3 and the connector 1 is
7, the terminal of the wire harness W / H is routed to the vehicle exterior 1 again through the work hole 3 c, and the connector 17 is connected to the fuel tank connector 4 a of the fuel gauge sensor on the upper surface of the fuel tank 4. I have. Also in this case, by bending the wire harness W / H at the bendable portion K, the terminal portion of the wire harness W / H can easily pass through the work hole 3c.

[0022]

As is apparent from the above description, by attaching the hard tube and the guide plate to the wire harness, even if the connector is temporarily placed on the upper surface of the vehicle body floor, the wire harness does not hang down and the fuel tank When the vehicle is mounted on the vehicle body floor, it does not interfere at all, so that pinching of the wire harness can be eliminated. Also, the connector can be prevented from being pinched since the fuel tank is temporarily placed on the upper surface of the vehicle body panel when the fuel tank is attached.

Further, by providing a bendable portion of the wire harness between the hard tube and the guide plate, the wire harness can be bent at the bendable portion, and can be passed through a work hole in a vehicle body floor to temporarily place the connector and to provide fuel. Connection to the connector on the upper surface of the tank can be easily performed.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a wire harness to which a hard tube and a guide plate according to the present invention are attached.

FIG. 2A is a perspective view showing a hard tube of the present invention, and FIG. 2B is a perspective view showing a reinforcing plate.

FIG. 3 is a perspective view showing a guide plate according to the present invention.

FIG. 4 is a diagram illustrating a wire harness wiring method according to the present invention;
It is the schematic which shows the temporary placement of the wire harness terminal before mounting a fuel tank.

FIG. 5 is a diagram illustrating a wire harness routing method according to the present invention;
It is a schematic diagram showing connection of a connector after fuel tank attachment.

FIG. 6 shows a conventional wiring harness routing method,
(A) is a schematic diagram showing a state before mounting a fuel tank,
(B) is a schematic diagram showing a state after mounting the fuel tank.

7A and 7B are schematic diagrams showing another conventional wiring harness wiring method, in which FIG. 7A is a schematic diagram showing a state before the fuel tank is mounted, and FIG. 7B is a schematic diagram showing a state after the fuel tank is mounted. is there.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 Body floor 3a Reinforcement frame 4 Fuel tank 4a Fuel tank connector 5 Grommet 7, 17 Connector 8 Tape 10 Guide plate 11 Hard tube K Bendable part W / H Wire harness

Claims (1)

[Claims] 1. A method of arranging a wire harness connected to a sensor of a fuel tank attached to a lower surface of a vehicle body floor, wherein a hard tube having a required length is externally provided from a terminal connected to a connector of the wire harness. An L-shaped guide plate provided with a clamp protruding at a required interval from the hard tube exterior position is attached to the wire harness, and a space between the hard tube and the guide plate is provided as a bendable portion. An L-shaped guide plate attached to the wire harness is arranged along a reinforcing frame projecting from a lower surface of a vehicle body floor, and a clamp projecting from the guide plate is inserted into a clamp hole of the reinforcing frame. Lock the connector of the wire harness terminal extending from the guide plate through the work hole drilled in the vehicle body floor. The wire harness should be able to be temporarily placed on the upper surface of the lower, and the wire harness should not be hung down by the hard tube. After the fuel tank is fixed to the lower surface of the vehicle body floor, the space between the wire harness guide plate and the hard tube is A wire harness wiring method for a vehicle connected to a connector of a fuel sensor of a fuel tank by bending a bendable portion of the vehicle body and extracting a connector of a wire harness terminal from a top surface of the vehicle body floor to a lower surface of the vehicle body floor through a work hole.