JPH028485Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to the wiring structure of a harness that is wired between the body of an automobile and a door that can be opened and closed with respect to the body.

(Prior Art) A conventional wiring structure for an automobile door is shown in FIG. 4, for example. The structure shown in FIG. 4 is for wiring the rear wiper drive wiring to the back door when the rear wiper is attached to the back door that opens and closes the rear of the vehicle.

In FIG. 4, a back door 52 is attached to the rear opening of an automobile body 51 via a hinge so that it can be opened and closed. A through hole 53a is bored in the body panel 53 constituting the body 51, and a through hole 54a is also bored in the inner panel 54 constituting the back door 52, which faces the through hole 53a. Between the through holes 53a and 54a is a grommet 56 that expands and contracts as the back door 52 opens and closes.
has been erected. A harness 55 is inserted through the grommet 56 and wired. That is, the harness 55 is wired between the automobile body 51 and the back door 52, with its outer periphery protected by the grommet 56.

(Problem to be solved by the invention) In the above conventional wiring structure, the backdoor 5
The body 51 and the back door 52 are opened and closed by the opening/closing operation of 2.
When the grommet 56 fixed in between expands and contracts,
There is a problem that the grommet 56 may be twisted and torn, and rainwater may enter through the torn portion. Further, when the back door 52 is opened and closed, the grommet 56 may be pinched between the body 51 and the back door 52, and the harness 55 inside the grommet 56 may be severed.

(Means for solving the problem) The present invention was devised in view of the above problem, and its purpose is to provide a wiring structure in which the grommet will not be twisted or pinched when the door is opened or closed. , the gist of which is that a body side through hole is drilled in a panel of an automobile body, and a door side hole is drilled in a door panel that is attached to the body so as to be openable and closable opposite to the body side through hole. a harness wired between the body and the door through the through hole; a retractable cylindrical grommet surrounding the outer periphery of the harness and having both ends fixed to the through holes on the body side and the door side; The harness and one end of the resin rod are fixed to the grommet at one end of the grommet, and the harness and the resin are inserted at the other end of the grommet. The rod is configured to freely slide within the grommet, and when the door is opened and closed, the free end side of the resin rod reciprocates within one of the through holes, and the grommet expands and contracts along the resin rod. This is what we have configured.

(Function) A harness and a resin rod are inserted into a telescopic grommet whose both ends are fixed to a through hole on the body side and a through hole on the door side, and one end of the harness and the resin rod is inserted into one end of the grommet. Because it is fixed, when the grommet expands and contracts as the door opens and closes, the free end of the resin rod inserted into the grommet reciprocates within one of the through holes, and the grommet expands and contracts along this resin rod. I will do it. Therefore, since the grommet is guided by the resin rod and the direction of expansion and contraction of the grommet is fixed, there is no possibility that the grommet will be twisted or caught between the body and the door as in the conventional case.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

1 and 3 show an embodiment, and FIG. 1 is an enlarged view of the main part of the wiring structure. Figures 2 and 3
The figures are side sectional views showing the entire wiring structure, FIG. 2 shows the back door in a closed state, and FIG. 3 shows the back door in an open state.

That is, this example shows a wiring structure for supplying electricity to a back door wiper attached to a back door that opens and closes a rear opening of an automobile body.

In the figure, a back door 4 is provided at the rear end of a body 1 via a hinge H so that it can be opened and closed. An outer panel 2 constituting the rear end of the body 1 is provided with a body-side through hole 3 through which a harness is passed. On the other hand, a door-side through-hole 6 is bored in an inner panel 5 composing the back door 4 facing the body-side through-hole 3 . A cylindrical expandable grommet 8 is attached between the body side passage hole 3 and the door side passage hole 6, and a harness 7 constituting electrical wiring is inserted into the grommet 8. The harness 7 is inserted from the body 1 side. Electricity can be supplied to the back door 4 side. Also, a resin rod 9 is provided inside the grommet 8 to guide the direction of expansion and contraction of the grommet 8.
is inserted.

To explain this in detail with reference to FIG. 1, in FIG. 1, two flanges 8aa projecting outward are formed at the end of the grommet 8 on the side of the back door 4, and a groove 8ab is formed between the flanges 8aa. has been done.

This groove 8ab is fitted into the inner panel 5 forming the outer edge of the door side passage hole 6 of the back door 4,
The door side end 8a of the grommet 8 is attached to the inner panel 5.
It plays the role of fixing it to the surface. On the other hand, at the other end of the grommet 8, there are similarly two flanges 8ba.
A groove 8bb is formed between the flange portions 8ba. This groove 8bb is fitted into the outer panel 2 forming the outer edge of the body-side through hole 3 of the body 1, and serves to fix the body-side end 8b of the grommet 8 to the outer panel 2.

Furthermore, an expandable bellows portion 8c is formed in the center of the grommet 8. That is, the bellows portion 8c expands and contracts as the back door 4 opens and closes. The grommet 8 is made of a thin flexible material such as rubber or synthetic resin.

The harness 7 inserted into the grommet 8 along its longitudinal direction and the door-side end 9a of the resin rod 9 inserted into the grommet 8 along the harness 7 in the longitudinal direction are connected to the door-side end of the grommet 8. Part 8
A protruding piece 8d integrally protruded longitudinally outward from a.
is fixed to via a fixing member 10. That is,
This fixing member 10 is made of rubber or the like, and includes the outer periphery of the protruding piece 8d, the harness 7, and the door side end 9a of the resin rod 9.
The outer periphery of the wire is tied and fixed.

At the body side end 8b of the grommet 8, the harness 7 and the resin rod 9 are in a free state and can freely slide back and forth within the grommet 8. The resin rod 9 is made of a resin material having flexibility and considerable hardness and is formed into a rod or plate shape, and the body side end 9b is closer to the body side end 8b of the grommet 8. It is formed in a length shape with a considerable length protruding.

Next, the operation will be explained with reference to FIGS. 2 and 3. When the back door 4 is in the closed state shown in FIG. Therefore, there is a compressed state between the back door 4 and the body 1. In this state, the fixed end 9a of the resin rod 9 inserted into the grommet 8 is inserted into the grommet 8.
At the same time, it is pushed by the back door 4, and the body side end 9b, which is the free end side, passes through the body side through hole 3 of the body 1 and projects into the inside of the outer panel 2. Therefore, the grommet 8 is compressed in the direction of the resin rod 9.

On the other hand, in FIG. 3, when the back door 4 is opened, the grommet 8 extends, the fixed end 9a of the resin rod 9 moves together with the grommet 8, and the body side end 9b is connected to the body side through hole 3. Move to the back door 4 side. In this case, the harness 7 is moved through the body side through hole 3 following the resin rod 9. When the back door 4 is closed from this state, the body side end 9b of the resin rod 9 is again inserted into the outer panel 2 through the body side through hole 3, as shown in FIG. Grommet 8 is compressed in the direction of resin rod 9.

In this way, the wiring structure of this example has a simple structure in which the resin rod 9 is inserted into the conventional grommet 8 and one end of the resin rod 9 is fixed to one end of the grommet. Since the grommet 8 can expand and contract in a fixed direction while being guided by the grommet 9, the grommet 8 will not be twisted or pinched between the outer panel 2 and the inner panel 5 of the back door when the back door 4 is opened and closed.

In this example, the wiring structure in the back door 4 is shown, but the wiring structure can be similarly applied to the wiring structure between the body 1 and other side doors.

(Effects of the invention) The present invention has a through hole on the body side that is bored in a panel of the automobile body, and a door panel that is attached to the body so as to be openable and closable opposite to the through hole on the body side. A harness disposed between the body and the door through a through hole on the door side, and a retractable cylindrical shape that surrounds the outer periphery of the harness and has both ends fixed to the through holes on the body side and the door side. a grommet, and a resin rod inserted into the grommet along the harness, the harness and one end of the resin rod being fixed to the grommet at one end of the grommet, and the harness and one end of the resin rod being fixed to the grommet at the other end of the grommet. In this case, the harness and the resin rod are constructed so that they can freely slide inside the grommet, and when the door is opened and closed, the free end side of the resin rod reciprocates in one of the through holes, and the grommet moves along the resin rod. Since the grommet is expandable and retractable, the grommet will not be bent or twisted when the door is opened and closed, and the grommet will not be caught between the body and the door. Therefore, the internal harness is not cut, and the harness is effectively protected.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, and FIG. 1 is an enlarged partial cross-sectional view of the main part of the wiring structure of the present invention;
2 and 3 are side sectional views showing the wiring state, FIG. 2 is an explanatory diagram showing the back door in the closed state, FIG. 3 is an explanatory diagram showing the back door in the open state, and FIG. 4 is the conventional one. FIG. 3 is a perspective view showing a wiring structure. 1...Body, 3...Body side passage hole, 4...Back door, 6...Door side passage hole, 7...Harness,
8...Grommet, 9...Resin rod, 10...Fixing member.

Claims (1)

[Scope of utility model registration request] It passes through a body-side through hole drilled in a panel of the automobile body and a door-side through hole drilled in a door panel that is openably and closably attached to the body opposite to the body-side through hole. A harness disposed between the body and the door, a retractable cylindrical grommet that surrounds the outer periphery of the harness and has both ends fixed to the through holes on the body side and the door side; The harness and one end of the resin rod are fixed to the grommet at one end of the grommet, and the harness and the resin rod are inserted into the grommet at the other end of the grommet. is configured to be able to freely slide, and when the door is opened and closed, the free end side of the resin rod reciprocates within one of the through holes, and the grommet expands and contracts along the resin rod. Characteristic automotive wiring structure.