JP3821959B2 - Steering column dust cover structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dust cover structure for a steering column.
[0002]
[Prior art]
As shown in FIG. 6, a hole cover 7 is fixed to the opening of the floor that penetrates the steering column of the vehicle by bolting through a waterproof seal member 11, and the hole cover 7 is also shown in FIG. 7. Further, a dust seal member 13 having a hole 12 penetrating the steering column is attached by screws. As shown in FIG. 8, the waterproof seal member 11 has a structure in which a lip 11 a is formed around the bolt and a bolt hole 14 is formed through a bolt for fastening the hole cover 7 to the floor.
[0003]
[Problems to be solved by the invention]
In the above conventional structure, the waterproof seal member 11 and the dust seal member 13 are separate from each other, and the dust seal member 13 is screwed into the hole cover 7. A mounting seat for the dust seal member 13 must be formed, which is expensive. Further, since the waterproof seal member 11 is penetrated by a bolt for fastening the hole cover 7 to the floor, the pressure contact force of the lip 11a through which the bolt passes is obtained, but the pressure contact force of the lip 11a between the bolts is weak. A uniform pressure contact force cannot be obtained over the entire circumference, and the waterproof seal function is not sufficiently achieved.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a dust cover structure for a steering column that has both functions of a waterproof seal and a dust seal with a single member and that can sufficiently obtain a waterproof seal function.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention has a notch recess for passing a bolt for fastening the hole cover to the floor at the four corners, and the periphery of the opening formed in the floor for penetrating the steering shaft. A rubber plate integrally formed with a dust seal part that opens a hole penetrating the steering shaft and closes the opening, and is formed on the floor of the hole cover. Clamps formed to fasten the hole cover to the floor with the bolts at the four corners corresponding to the notch recesses on the outer periphery of the rubber plate sandwiched between the periphery of the opened opening and the hole cover consists of a biasing seat, said waterproof sealing portion includes a lip pressed against the floor at a site spaced from the clamping seat surface of the hole cover, The rubber plate interposed pinched between the hole cover and the floor by serial bolting of the clamping seat surface, it is characterized in that it has pressed the lip to the floor by the compressive force.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a rubber plate, and as shown in FIGS. 2, 4, and 5, notch recesses 2 through which bolts 10 for fastening the hole cover 7 to the floor 6 are formed at the four corners. Has been.
[0007]
The rubber plate 1 includes a waterproof seal 3 that is sandwiched between the hole cover 7 and the periphery of the opening 6 a provided in the floor 6 so as to penetrate the steering shaft 15, and the steering shaft 15. Is formed integrally with a dust seal 5 that closes the opening 6a.
[0008]
Further, the waterproof seal portion 3 is provided with a lip 9 that presses against the floor 6 at a portion separated from the fastening seating surface 8 of the hole cover 7, and the rubber plate 1 is compressed by the compression force of the hole cover 7 by bolting. In this structure, the hole cover 7 and the floor 6 are interposed.
[0009]
Since the present invention has the structure described above, the hole cover 7 and the floor 6 are separated by the waterproof seal portion 3 formed on the rubber plate 1 interposed between the hole cover 7 and the floor 6. This prevents intrusion of water from the space and closes the opening 6a for penetrating the steering shaft 15 provided in the floor 6 by the dust seal portion 5 to prevent intrusion of dust. Therefore, unlike the prior art, the waterproof seal member and the dust seal member are not separate, reducing the number of assembly steps and reducing the cost.
[0010]
Further, the rubber plate 1 is interposed between the hole cover 7 and the floor 6 where the bolt 10 passes through the notch recesses 2 formed at the four corners thereof and is fastened to the floor 6. By the force, the lip 9 of the waterproof seal part 3 is evenly pressed over the entire periphery, so that the waterproof seal function is sufficiently achieved.
[0011]
Further, since the lip 9 of the waterproof seal portion 3 is provided in a part separated from the tightening seat surface 8 of the hole cover 7, the lip 9 rides on the tightening seat surface 8 when the hole cover 7 is tightened. 9 is prevented from being damaged or forming a gap between the fastening seat surface 8 and the floor 6.
[0012]
【The invention's effect】
As described above, according to the present invention, a single rubber plate prevents water from entering between the hole cover and the floor, and closes an opening for penetrating the steering shaft provided on the floor to allow dust to enter. Therefore, the number of parts and assembly man-hours can be reduced, and the cost can be reduced. Further, the lip of the waterproof seal portion does not run over the tightening seating surface of the hole cover, and has an advantage that the waterproof seal function can be sufficiently achieved because the lip of the waterproof seal portion is evenly pressed over the entire periphery.
[Brief description of the drawings]
FIG. 1 is a plan view of a rubber plate according to the present invention.
FIG. 2 is a cross-sectional view of a dust cover structure for a steering column according to the present invention.
FIG. 3 is a rear view of a rubber plate according to the present invention.
4 is a cross-sectional view taken along line BB in FIG.
FIG. 5 is a view taken in the direction of arrow A in FIG.
FIG. 6 is a cross-sectional view of a conventional structure.
7 is a view taken in the direction of arrow C in FIG. 6;
FIG. 8 is a view taken in the direction of arrow D in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rubber plate 2 Notch recessed part 3 Waterproof seal part 4 Hole 5 Dust seal part 6 Floor 6a Opening part 7 Hole cover 8 Fastening seat surface 9 Lip 10 Bolt 15 Steering shaft

Claims (1)

Cutout recesses that allow bolts to fasten the hole cover to the floor are formed at the four corners, and are sandwiched between the hole cover and the periphery of the opening formed in the floor to penetrate the steering shaft. A rubber plate formed integrally with a waterproof seal portion and a dust seal portion that opens a hole penetrating the steering shaft and closes the opening;
The hole cover is fastened to the floor by the bolts at the four corners corresponding to the notch recesses on the outer periphery of the rubber plate sandwiched between the hole cover and the opening provided on the floor of the hole cover. A fastening seat surface formed to
The waterproof seal is provided with a lip that presses against the floor at a portion spaced from the fastening seat surface of the hole cover, and the rubber plate is interposed between the hole cover and the floor by bolting the fastening seat surface. A dust cover structure for a steering column, wherein the lip is pressed against the floor by the compression force.

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