JPH0573081B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mounting structure for a vehicle antenna, and particularly to a mounting structure for an antenna rod storage pipe to a vehicle body panel.

(Prior Art) As a conventional mounting structure for a vehicle antenna, for example, as shown in FIGS. 2 and 3, a conductive ground pipe 102 is press-fitted onto the outer periphery of an antenna rod storage pipe 101 that stores an antenna rod 100. The antenna rod storage pipe 101 is fitted and fixed by an appropriate means, and the antenna rod storage pipe 101 is passed through a vehicle body panel 103 such as a fender panel from inside the vehicle, and a seal ring 104 made of synthetic resin is attached to the tip of the antenna rod storage pipe 101. From the outside, insert the nut 105 into the antenna rod storage pipe 1.
01, thereby protruding from the flange portion 102a at one end of the earth pipe 102 at an appropriate interval in the circumferential direction.
It is known that the antenna rod storage pipe 101 is fixedly held on the vehicle body panel 103 by sandwiching the vehicle body panel 103 between the ends of the antenna rods 6, 106 and the seal ring 104. For reference, please refer to the maintenance manual issued by Nissan Motor Co., Ltd. in June 1982.
The Y30 type has 465 pages.

(Problems to be Solved by the Invention) However, in such a conventional mounting structure, the ground pipe 102 fixed to the outer periphery of the antenna rod storage pipe 101 is directly and firmly crimped to the vehicle body panel 103. As a result, vibrations caused by the wind resistance of the antenna rod (not shown) that occur when the vehicle is running may propagate directly to the vehicle body panel 103 via the antenna rod storage pipe 101 and the ground pipe 102, or if the antenna is electrically operated as in the illustrated example. In this case, the vibration of the electric motor 107 that drives the antenna rod to extend and retract is also propagated to the vehicle body panel 103, causing unpleasant noise such as wind noise and motor vibration noise to be generated in the vehicle interior.

Therefore, the present invention was made by focusing on the above-mentioned conventional problems, and its purpose is to absorb the vibrations of the antenna rod or the electric motor when the vehicle is running, and to propagate the vibrations to the vehicle body panel. An object of the present invention is to provide a mounting structure for a vehicle antenna that can effectively prevent such problems.

(Means for solving the problem) In order to achieve the above object, in the present invention,
an antenna rod storage pipe inserted into a mounting hole drilled in a vehicle body panel; a fixing means for fixing the antenna rod storage pipe to the vehicle body panel;
The fixing means includes a ground pipe that is fitted and fixed to the outer periphery of the antenna rod storage pipe inside the vehicle body panel and has a flange portion on the vehicle body panel side, and the antenna rod storage pipe to which the ground pipe is fitted and fixed is fixed to the vehicle body panel. and a tightening member that is tightened toward the antenna rod storage pipe, and the tightening member is screwed onto the outer periphery of the antenna rod storage pipe on the outside of the vehicle body panel, and a seal ring that is fitted on the outer periphery of the antenna rod storage pipe on the outside of the vehicle body panel. A nut for tightening a seal ring toward the ground pipe, and a ring-shaped part interposed between the antenna rod storage pipe and the circumferential surface of the mounting hole, and a flange part of the ground pipe. and a conductive member that electrically connects the earth pipe and the vehicle body panel;
The conductive member includes a ground plate fixed to at least the surface of the annular portion on the vehicle body panel side, and a conductive material that electrically connects the ground plate and the ground pipe. The portion is made of an elastic member.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In FIG. On the outer periphery, a similarly conductive earth pipe 2 having a flange portion 2a on the vehicle body panel 3 side is fitted and fixed by a fixing means 11. The fixing means 11 is composed of an earth pipe 2 and a tightening member 12, which will be described later, and the tightening member 12 is composed of a seal ring 9 and a nut 10, which will be explained later. One end of the antenna rod storage pipe 1 extends from the inside of the vehicle body through a mounting hole 4 formed in a vehicle body panel 3 and extends to the outside, and a ground pipe 2 is fixed to the outer periphery of the antenna rod storage pipe 1.
An annular elastic member 5 for vibration isolation made of rubber or the like is interposed between the flange portion 2a and the vehicle body panel 3, and an annular elastic member 5 as a ring-shaped portion extending in the axial direction is provided on the inner circumference of the elastic member 5. A projection 5a is integrally formed, and the annular projection 5a is fitted into the mounting hole 4 of the vehicle body panel 3. At this time, the outer diameter of the annular projection 5a is
The annular projection 5a is formed to be slightly larger than the diameter of the mounting hole 4, and therefore the annular projection 5a is elastically engaged with the circumferential surface 4a of the mounting hole 4.

On both sides of the annular portion 5b of the annular elastic member 5, a pair of annular ground plates 6 and 7 made of a conductor such as metal are provided.
These ground plates 6 and 7 are electrically connected to each other by a flexible bonding wire 8, which is a conductive material made of a plain woven copper wire, etc., and one of the ground plates 6 (the upper side in FIG. ground plate) is
Approximately conical protrusions 6 are provided at appropriate intervals in the circumferential direction.
It consists of a plurality of protruding parts a, 6Aa.... Here, the conductive member 13 is constituted by the ground plates 6 and 7 and the bonding wire 8.

A seal ring 9 made of synthetic resin or the like is fitted to the end of the antenna rod storage pipe 1 that protrudes from the vehicle body panel 3, and a nut 10 is screwed from the outside of the seal ring 9, and this nut 10 is tightened. A conical projection 6 is formed on the lower end surface of the seal ring 9 and the upper ground plate 6 by
a, 6a, . . . are adapted to hold the vehicle body panel 3, thereby fixing and supporting the antenna rod storage pipe 1 to the vehicle body panel 3 via the earth pipe 2, the elastic material 5, and the seal ring 9. . At this time, the conical projection 6a of the upper ground plate 6,
The point of 6a... breaks through the paint film of the car body panel 3 whose surface is coated with anti-corrosion paint, and penetrates into the conductive car body panel 3.
Therefore, the antenna rod housing pipe 1 is connected to the vehicle body panel 3 via the ground pipe 2, the lower ground plate 7, the bonding wire 8, the upper ground plate 6, and the conical protrusions 6a, 6a... It is grounded.

Next, the operation of the above embodiment will be explained.

The vibration of antenna rod 0 generated by the wind resistance of antenna rod 0 while the vehicle is running is propagated to antenna rod storage pipe 1, and from there it is transmitted to earth pipe 2, lower earth plate 7, elastic material 5, and upper earth plate 6.
and the conical protrusions 6a, 6a, . In other words, it is possible to avoid a situation where wind noise is transmitted into the vehicle interior and causes discomfort to the occupants.

Also, it is a well-known fact and has been experimentally confirmed that the most effective way to ground is to connect the antenna rod 0 through the vehicle body panel 3. A pair of ground plates 6 and 7 are provided so as to sandwich them and surround the mounting hole 4 of the vehicle body panel 3, and these ground plates 6 and 7 are connected with a flexible bonding wire 8, which is a conductive material that does not easily transmit vibrations. Therefore, the most effective grounding can be achieved in the vicinity of the mounting hole 4 of the vehicle body panel 3, and the vibrations transmitted from the antenna rod 0 to the lower ground plate 7 are blocked by the flexible bonding wire 8. Vibration propagation to the ground plate 6 can be avoided.

In the above embodiment, the pair of ground plates 6 and 7 on both sides of the elastic member 5 are connected to the bonding wire 8.
However, if necessary, the lower earth plate 7 may be omitted and the upper earth plate 6 may be directly connected to the earth pipe 2 by the bonding wire 8.

(Effect of the invention) The present invention consists of the above structure and operation,
An elastic material inserted between the ground pipe fitted and fixed to the outer circumference of the antenna rod storage pipe and the vehicle body panel prevents vibrations caused by the wind resistance of the antenna rod when the vehicle is running or vibrations of the electric motor used to drive the power antenna's expansion and contraction. It can effectively prevent vibrations from being transmitted to the vehicle body panels, thereby preventing wind noise from the antenna rod, vibration noise from the motor, etc. from propagating into the vehicle interior and causing discomfort to the passengers. Never.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a vehicle antenna mounting structure according to the present invention, FIGS. 2 and 3 are conventional vehicle antenna mounting structures, and FIG. 2 is a perspective view of the entire structure, and FIG. Figure 3 is a longitudinal sectional view thereof. 1... Antenna rod storage pipe, 2... Earth pipe, 3... Vehicle body panel, 5... Elastic material, 6
... Upper ground plate as a ground plate, 9... Seal ring, 10... Nut.

Claims (1)

[Scope of Claims] 1. An antenna rod housing pipe 1 having an antenna rod housing pipe 1 inserted into a mounting hole 4 formed in a vehicle body panel 3, and a fixing means 11 for fixing the antenna rod housing pipe 1 to the vehicle body panel 3. The fixing means 11 is
Antenna rod storage pipe 1 inside the vehicle body panel 3
A ground pipe 2 that is fitted and fixed on the outer periphery and has a flange portion 2a on the side of the vehicle body panel 3, and an antenna rod storage pipe 1 to which the ground pipe 2 is fitted and fixed.
a tightening member 12 for tightening the antenna rod toward the vehicle body panel 3;
a nut 10 that is screwed onto the outer periphery of the outer antenna rod storage pipe 1 and tightens the seal ring 9 toward the ground pipe 2; An annular portion 5b sandwiched between the flange portion 2a of the earth pipe 2 and the vehicle body panel 3, and an electrical connection between the earth pipe 2 and the vehicle body panel 3. A conductive member 13 is connected to a ground plate 6 fixed to at least the surface of the annular portion 5b on the vehicle body panel side.
and a conductive material 8 that electrically connects the ground pipe 2, and the annular portion 5b is made of an elastic member.