JPS5821810Y2 - Vehicle floor structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle floor structure using an aluminum honeycomb sandwich panel as a floor plate.

Conventional vehicle floor structures generally consist of a floor finishing material 1, a floor plate 2, a floor plate support 3, and a deck plate 4, as shown in Figs. 1 and 2, and the load on the floor (passenger load) is It is transmitted from the material 1 to the deck plate 4.

Deflection of the floor plate 2 due to the load on the floor gives passengers a sense of anxiety, so this can be counteracted by increasing the rigidity of the floor plate 2 in the structure shown in Figure 1, and by narrowing the interval A between the floor plate supports 3 in the structure shown in Figure 2. I've been doing it.

Therefore, in any case, the conventional floor structure has disadvantages in terms of thickness and weight.

Furthermore, in the conventional structure, there is no space at all under the floorboards.
Even if there is, it takes up only a small amount of space, so it is not possible to install piping and wiring under the floor, and most of the equipment is installed outside the vehicle, making it easily affected by the external environment such as rain and snow. there were.

This invention is lightweight and has excellent rigidity by using aluminum honeycomb sandwich panel floorboards, and is soundproof, non-combustible, and
An object of the present invention is to provide a floor structure for a vehicle that has excellent heat insulation properties and effectively utilizes the middle part of the floor for girding, etc.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIG. 3, 1 is a floor finishing material, 2 is a floor plate, 3 is a floor plate support arranged in the longitudinal direction of the vehicle, and 4 is a deck plate.

The floor plate 2 has facing materials 2b on both sides of an aluminum honeycomb core 2a.
, 2b are bonded to an aluminum honeycomb sandwich panel.

The floor plate support 3 is preferably constructed of an aluminum extruded material.

The deck plate 4 is preferably made of a bent plate material such as aluminum alloy or steel.

As is well known, aluminum honeycomb sandwich panels have excellent specific strength (the ratio of weight to stiffness) (approximately 1/2 that of light alloy veneers).

Therefore, the floor structure of the present invention in which the aluminum honeycomb sandwich panel is used as the floor plate 2 and the floor plate supports 3 are arranged in the longitudinal direction of the vehicle allows the thickness of the floor plate 2 to be smaller than that of the conventional one.
Moreover, the number of floor plate supports 3 can be reduced, and therefore a large space 6 that is continuous in the longitudinal direction of the vehicle can be formed between the floor plate 2 and the deck plate 4.

Various equipment such as a wiring box 7 and piping can be placed in this space 6, and furthermore, the deck plate 4 is coated with a heat-insulating airtight material 5 to make the space 6 an airtight room, which improves heat insulation and sound insulation. This space 6 can also be used as an air duct.

According to the present invention, aluminum honeycomb sandwich panels are used as floor plates, and floor plate supports are arranged in the front and rear directions of the vehicle.
Furthermore, by providing a heat insulating and airtight material on the deck plate, a lightweight and highly rigid floor structure is obtained, and a wide space that is continuous in the longitudinal direction of the vehicle can be formed between the floor plate and the deck plate, so wiring can be wired in this space. , hydraulic and pneumatic piping, air conditioning air passages, motor cooling air passages, and other equipment can be installed, and these equipment can be protected from rain, snow,
Can be protected from external environment such as temperature.

Furthermore, aluminum honeycomb sandwich panels have low thermal conductivity (approximately 0.5 KCal/mh 'C) and
Since there is a space 6 between the floorboard 2 and the deck plate 4 that serves as an air layer, and a heat insulating airtight material is provided on the deck plate, not only the heat transmission rate of the entire floor structure is significantly reduced, but also the sound insulation performance is high. Improving dramatically.

According to experiments, the heat transfer rate of the floor structure of the present invention is 0.2 K.
Cal/rr? The value of h'C is shown, and the value of 0.
Heat loss was significantly reduced compared to 44-0°65 KCal med°C.

Also, the sound range in which the sounds generated by vehicles are significantly higher, that is, 300~
We were able to increase the transmission loss of 1,000 Hz sound by up to 8 dB compared to conventional floor structures.

[Brief explanation of the drawing]

1 and 2 are longitudinal sectional views of a conventional general floor structure, and FIG. 3 is a longitudinal sectional view along the width direction of a vehicle showing one embodiment of the floor structure according to the present invention. 1... Floor finishing material, 2... Floor board, 2a.
... Aluminum honeycomb core, 2b ... Face material, 3 ... Floor board support, 4 ... Deck plate, 5 ... Heat insulation airtight material, 6...Space.

Claims (1)

[Scope of utility model registration request] In a floor structure consisting of a floor finishing material, a floor plate, a floor plate support, and a deck plate, the floor plate is composed of an aluminum honeycomb sandwich panel, the floor plate support is arranged in the front-rear direction of the vehicle, and a heat-insulating airtight material is provided on the deck plate. A floor structure for a vehicle, characterized in that the space between the floor plate and the deck plate is made into an airtight chamber.