JPS61105275A - Joint-part structure of floor panel - Google Patents

Abstract

PURPOSE:To improve the sealing effect by forming a sealing guide bead at the chassis rear edge of a front floor in the direction of car width and superposing a rear floor onto the bead concaved part, projecting the chassis front flange, thus increasing the sealing area. CONSTITUTION:At the rear edge of the chassis of a front floor 1, a sealing guide bead 2 projecting under the chassis so as to shield the axis line in the direction of splash approaching under the chassis is formed in the direction of car width. Said guide 2 is formed from the bead concaved part 2a opened above the chassis and the bead projection part 2b projecting under the chassis, and the projecting width of the bead projection part 2b is set to the value sufficiently shielding the axis line L1 in the direction of splash approaching to the undersurface of the floor. While, the front flange 3a of the chassis of a rear floor 3 is superposed onto the rear edge of the chassis on the upper surface of the front floor 1 so as to project into the bead concaved part 2a, and the inside seam between the both floors 1 and 3 is sealed by a sealer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application λ) The present invention relates to a joint structure of an automobile floor panel, particularly a sealing structure at a joint between panel members such as a front floor and a rear floor. In general, the joints of panel members are prone to damage due to inadequate pretreatment and painting, and the end surfaces of panel members in particular are prone to shrinkage due to surface tension and thinning of the paint film during cracking or baking of the paint film. There was a tendency for rust to develop from this part.

Therefore, in the conventional example shown in FIG.
The outside seam of the rear floor 30 is structured so that it does not face the direction of water splashing, and the seam 240 is applied to the inside seam using a sealing gun 50 to make it dustproof and waterproof. 20 in the figure is a sealing guide bead extending in the vehicle width direction formed on the rear edge of the front floor 10, and protruding upward from the upper surface of the floor. A seam 240 is attached along the line 20.Another conventional example is Utility Model Application No. 57-66965.
There are some things described in the No.

(Problems to be Solved by the Invention) However, according to the structure of the conventional example described above, the front floor 10 and the rear floor 30 are joined in a horizontal wrap type9, and furthermore, the seven lunges of the rear floor 30 are flat. Since the sheet 40 was placed on the front 70a 10, even if the sheet 40 was attached along the sealing guide bead 20, only the plate edge of the rear floor 30 could be sealed, which caused problems in terms of waterproof performance. When hard particles such as pebbles and sand that are blown away by the tires hit the outer seam along the direction of the axis of the splash force, the paint film peels off (chipping) and rusts in a short period of time. Another problem was that corrosion progressed locally from the outer surface to the inner surface.

Therefore, the object of the present invention is to
To improve the waterproof performance by ensuring the sealing of the seam of the two members, and to improve the rust prevention performance by effectively preventing chipping from occurring at the outer seam between the two members.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a bead protruding portion on the rear edge of the vehicle body of the front floor, which protrudes downward from the floor surface, and a bead recess. A rear floor is stacked on the upper surface of the front floor so that a sealing guide bead is formed in the vehicle width direction so that a portion thereof opens upwardly, and the seven lunges in front of the vehicle body of the rear floor protrude to the molded portion of the bead recess. It is constructed by joining together.

(Examples) The present invention will be explained below based on illustrated examples.
In Fig. 11 and Fig. 2, reference numeral 1 denotes a front floor that constitutes the floor surface of the car body, and a lower blade of the car body is attached to the rear edge of the car body of this front 70a1 so as to block the axis in the splash direction adjacent to the lower part of the car body. A sealing guide bead 2 protruding to the side is formed in the vehicle width direction. The above-mentioned sealing guide bead 2 consists of a bead recess 2a that opens upward and a bead protrusion 2b that protrudes toward the lower blade side of the vehicle body. The splash direction axis L1 is set to a value sufficient to cover the splash direction axis L1 which is close to the splash direction axis L1. Reference numeral 3 denotes a rear floor that is interconnected to the front 70a1 by spot welding or the like to constitute a single floor surface, and the front flange 3a of the rear floor 3 is placed on the rear edge of the vehicle body on the upper surface of the front floor 1 to the above-mentioned sealing guide. - The molded part of the bead recess of the door 2, in this embodiment, the rear floor 3 is overlapped from above so that it especially protrudes into the bead recess 2a circle, and the outer seam of both floors is in the direction of the splash. The structure is oriented in the opposite direction to prevent water from entering. 4 is a sheet that seals the inner seam of the front floor 1 and the rear floor 3, and is filled in the bead recess 2a to seal the bead recess 2a.
A seal is provided between the seven langes 3a of the rear floor 3 projecting inward and the front floor 1 in the vehicle width direction.

3 and 4 show another embodiment of the present invention, and the same components as those in the embodiment of FIGS. 1 and 2 are designated by the same reference numerals and will be described below. In Fig. 2, the 7 langes 3a of the beam file 0A 3 are bent downwardly, whereas the 7 langes 3b of the rear floor 3 in Fig. 3 extend to the molded part of the bead recess. death,
The difference is that the flange 9 protrudes upward at right angles, while the 7 langes 3C of the rear floor 3 shown in FIG. 4 protrude upward in a curved manner.

Thus, in the embodiments of FIGS. 3 and 4,
Since the 7 lunges 3b and 3c of the rear floor 3 protrude upward, they can be used as locators when pasting the Melsheet 5 on the floor consisting of the 70ton 70a1 and the rear floor 3, thereby preventing the Melsheet from shifting. This has the advantage that the clearance of plugs and brackets fixed to the floor can be reduced and sound insulation performance can be improved.

In the above configuration, when the sheet 4 is filled into the bead recess 2a of the front floor 1 using the sealing gun 6, the seven flange 3a, 3b, 3c of the jab lower 3 protrude above the bead recess 2a. Therefore, the opposing joint surfaces of the front floor 1 and rear floor 3 can be completely sealed, and the sealing area can be dramatically increased. Also front 70
Since the bead protruding portion 2b of A1 protrudes toward the lower side of the vehicle body so as to meet the splash direction axis L1t adjacent to the lower surface of the floor, when the vehicle is running, pebbles or Even if solid objects such as sand fly, you can get rid of them before they hit the outer seams of the floor. In addition, there may be cases where pebbles, sand particles, etc. that fly along the axis of the tin rush direction away from the bottom of the floor hit parts other than the joints on the bottom of the floor; In comparison, since it can be completely painted, rusting will not be a problem.

(Effects of the Invention) Since the present invention has the above-described structure and operation, the sealing area by the sear 2 can be increased, and the seams of the floor can be reliably sealed, so that the waterproofness can be improved.

In addition, while the vehicle is running, pebbles may appear along the axis of the tin rush direction.
Even if particles of sand fly, it is possible to prevent them from hitting the seams of the floor, thereby effectively preventing chipping from occurring near the seams.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing the joint structure of a floor panel according to the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIGS. 3 and 4 show other embodiments of the present invention. Also shown in Figure 1A
-A! 5 is a sectional view showing the structure of a conventional example. Explanation of symbols 1... Front floor 2... Ceiling guide bead 2a... Bead recessed part 2b - Bead protrusion part 3... Rear floor 3a, 3b
, 3c...7 Lange Patent Applicant Nissan Motor Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] On the rear edge of the front floor, a sealing guide bead is formed in the single width direction, with a bead protrusion projecting downward from the floor surface and a bead recess opening upward. A floor panel joint structure characterized in that a rear floor is overlapped and joined to the upper surface of the front floor so that the front flange of the vehicle body protrudes to the molded part of the bead recess.