JPS5927329Y2 - Waterproof structure of vehicle underfloor box - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a waterproof structure for an underfloor box for a vehicle.

The underfloor box of a vehicle must be constructed to be dustproof and waterproof in order to protect the electrical equipment housed inside from the harsh environment, but it is desirable that the waterproof structure be durable and inexpensive.

FIG. 1 shows a partial sectional view of the lid attachment of a conventional box with a single-layer packing structure.

A packing support 2 is attached to a box body 1 by spot welding via a spot sealer 3, a packing 4 is fitted, and a lid 5 is tightened with its edge biting into the packing 4.

FIG. 2 shows a partial sectional view of a conventional box with a lid attached to a double gasket structure.

A packing support 6 is attached to the box body 1 by spot welding via a spot sealer 3, and the inner edge of this packing support 6 projects higher than the packing 4.

A gasket support 8 is provided on the lid 7, and a gasket 9 is attached to the lid 7, and the outer edge of the lid 7 is made to protrude higher than the gasket 9.

The outer edge of the lid 7 and the inner edge of the gasket support 6 of the box body 1 are tightened so as to bite into the gaskets on the opposing side, thereby forming a double gasket structure.

In the above single and double packing structures, if the spot sealer 3 deteriorates, water, moisture, etc. will enter the box through the gap between the box and the packing, causing harm to the electrical equipment.

Furthermore, since the box body and the packing support are spot welded, the packing support is weak in reinforcing the box, and there is a problem in terms of vibration resistance.

The object of the present invention is to eliminate the above-mentioned drawbacks and provide a waterproof structure for a vehicle underfloor box that is completely waterproof and strong.

FIG. 3 shows a front view of an underfloor box for a vehicle, which is an embodiment of the present invention.

A lid γ is attached to the front side of a sheet metal box body 1 so as to be openable and closable with a hinge 10, tightened with a keracher 11, and suspended from the lower part of the vehicle body by a support stand 12.

Depending on the application, a double packing or single packing waterproof structure is applied to the joint between the box body 1 and the lid 7.

FIG. 4 is a sectional view taken along the line AA of the double packing structure box shown in FIG. 3, and FIG. 5 is a sectional view taken along the line BB.

The edge of the box body 1 is bent in two steps so that a part of the edge is overlapped, and a packing support 13 is attached to the end of the box so that its inner edge projects higher than the packing groove 4, forming a packing groove. Patsukin 4 is stuffed inside it.

The lid 7 is the same as the lid of the conventional double Harakin structure box shown in FIG. The box body 1 and the lid 7 are tightened so that their mutually protruding edges engage with the opposing gasket.

FIG. 6 shows a sectional view of the double packing structure box shown in FIG. 3 along the line C-C.

A packing groove is formed by folding the edge of the box body 1 in three stages so that a part thereof overlaps, and a packing groove 4 is stuffed into the packing groove, but the inner edge of the packing groove is projected higher than the packing groove 4.

The lids 7 having the structure shown in FIG. 2 are fastened to this box body portion so that their protruding edges engage with the gaskets on the opposite side.

The single-layer packing structure is applied to boxes that do not require very strict waterproofness depending on the application, but in this case, the packing groove of the lid of the double-packing structure described above and the one without the packing can be directly attached to the box above the momme. Fit and install.

FIG. 7 shows a cross-sectional view of the section BB in FIG. 3 having a single packing structure.

It has a structure in which the packing support 8 and packing 9 are removed from the structure shown in Fig. 5.

According to the present invention, the packing support part of the box body is formed by a folding structure in which the periphery of the box body is partially folded over, making the box strong, improving vibration resistance, and ensuring long-term water efficiency. Moreover, since the heavy packing and double packing structure are separated into one piece using the same parts, there is an effect of reducing the cost by reducing the number of parts.

[Brief explanation of the drawing]

Figure 1 is a partial sectional view of the lid attachment of a conventional box with a single packing structure, Figure 2 is a partial sectional view of the lid attachment of a conventional box with a double packing structure, and Figure 3 is an embodiment of the present invention. Figure 4 is a front view of the underfloor box for a vehicle.
A section sectional view, FIG. 5 is the same <B-B section sectional view, FIG. 6 is the same <C-C section sectional view, and FIG. 7 is a B-B section sectional view of the single packing structure box in FIG. 3. It is. 1... Box body, 2... Packing support, 3... Spot shield, 4... Packing, 5... Lid, 6... Packing support, 7... Lid, 8...- Patchkin support, 9...
- Patchkin, 10... Hinge, 11... Keracha 12... Support stand, 13... Patchkin support.

Claims (1)

[Scope of utility model registration request] In a vehicle underfloor box formed by joining a sheet metal lid to a sheet metal box through a gasket, a portion of the periphery of at least one of the box and the lid is folded inward. A waterproof structure for an underfloor box for a vehicle, characterized in that the packing is supported by a packing supporting portion formed by bending the packing.