JPS5937419Y2 - vehicle floor structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in the floor structure of a vehicle, such as the rear floor of a pan.

In a cab-over type van truck, the engine, exhaust system, drive system, etc. are located under the floor such as the rear floor, and the radiant heat and noise of the engine enters the cabin through the large floor surface, so heat and sound insulation measures are required. is necessary.

Conventionally, heat shielding, sound shielding, etc., have been attached to the underside of floors such as the rear floor by screwing or welding, but this requires the work to install the components from under the floor, making the installation difficult. It is difficult to assemble, has poor workability, and is unfavorable for assembly work and mass production.

Furthermore, when the intermediate portion of the above-mentioned member is screwed, welded, etc., the peripheral portion of the member is not fixed to the lower surface of the floor panel, and a gap is generated in this portion, so that there is no sound insulation effect.

Further, the above members are installed independently of the reinforcing frame provided on the lower surface of the floor panel, and therefore do not contribute to reinforcing the floor panel.

Furthermore, in addition to the above-mentioned members, there are also
Although soundproofing material is installed, this increases the number of parts in addition to the above-mentioned members, and the installation work becomes troublesome and complicated.

If the frame is made thicker in order to increase the strength and rigidity of the floor panel, it will become a heavy object, making it impossible to reduce the weight of the entire floor structure, and the thick steel frame will need to be filled with sound absorbing material. It is difficult to deep draw the recessed part for this purpose.

This invention was developed to solve the above-mentioned problems in cab-over type van trucks.The purpose of this invention is to prevent engine radiant heat from being transmitted to the floor and into the passenger compartment, and to reduce noise. To provide a floor structure for a vehicle that prevents intrusion, reduces weight, simplifies processing, and improves ease of assembly, while increasing the strength and rigidity of the floor surface.

In order to achieve such an objective, the present invention forms the periphery of the opening provided in the reinforcing member of the sheet metal press-formed product to be joined to the lower surface of the floor panel in the flange portion, while forming the periphery of the opening provided in the reinforcing member of the sheet metal press-formed product separate from this. The periphery of the dish-shaped heat shielding member made of The flange part of the reinforcing member is joined to the bottom surface of the floor panel by interposing the flange part of the thermal member, and the sound-absorbing material is filled in the closed space formed between the floor panel and the dish-shaped heat shielding member. The summary is what was done.

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a cab-over type van truck 1.
The floor panel 3 forming the rear floor 2 of the truck 1 is constructed flat, and the cross section of the panel 3 has a corrugated shape with ribs 3a running longitudinally in the front and rear direction formed at predetermined intervals in the width direction, as shown in FIG. It has a reinforced structure.

An engine, a drive system, and an exhaust system are arranged under the panel 3 forming the rear floor 2.

FIG. 2 is an exploded perspective view of the floor panel and reinforcing member, and a frame 4, which is a reinforcing member, is attached to the lower surface of the panel 3.

The frame 4 is made of a press-molded sheet metal product, and has a channel-shaped cross section, with left and right front and rear portions 4a, 4a, and cross portions 4b, 4c, 4 that cross-connect these portions 4a, 4a.
The cross portions 4b, 4c, and 4d are spaced apart from each other in the front-rear direction, have a channel-shaped cross section, and are integrally molded from a single plate to form a planar ladder shape.

A rectangular opening 4c is formed in the center of the frame 4, a channel-shaped cross separate member 4f is horizontally welded to one end of the frame 4, and openings 4g and 4h are formed in front and behind the opening 4e. The openings 4e+4g, 4h are defined by cross portions 4b, 4c and a separate member 4f.

The upper end peripheries of the openings 4e+4g and 4h are each bent inward to form flange portions 4I...

5. Reference numerals 5 and 6 denote holding members which are heat shielding members, and are made of press-molded sheet metal.The holding members 5 and 5 have front and rear openings 4g formed by the frame 4 and the separate member 4f.
, 4h, and has outwardly bent flange portions 5a, 5a on the upper peripheral edge.

The holding member 6 has a dish shape that fits into the offset portion of the central opening 4e, and has a flange portion 6a bent outward at the peripheral edge of the upper end.

The length of the holding member 6 corresponds to the front-rear direction of the opening 4e, and the width thereof is sufficiently smaller than the width of the opening 4e.

On the other hand, a window 3b is provided at a suitable location in the floor panel 3, which fits in with the opening of the part excluding the member 6 disposed near the opening 4e. By opening the lid 7, the window 3b is opened so that the engine can be inspected, repaired, etc.

In the above, the central holding member 6 and the front and rear holding members 5, 5 are connected to the opening of the frame 4' g + 4 e p4
Fit the bottoms 5b, 6b, 5b onto the flange portion 5
a on the flange portion 41.4+ of this and lock it.

The flange portion 6a of the central holding member 6 is fitted and locked in a position offset to one side of the opening 4e, and the other side of the opening 4e remains open with a sufficiently large area.

Thus, between the lower surface of the floor panel 3 and the flange part 41 of the frame 4, the flange part 5a of the holding member 5, 5.6,
5a and 6a are sandwiched, and the flange portion 41 of the frame 4 is welded to the floor panel 3.

The flange portions 4j, 4j provided at the upper ends of the outer walls of the longitudinal portions 4a, 4a of the frame 4 are directly welded to the lower surface of the floor panel.

The frame holding members 5, 5.6 are installed in the same process in the process of joining the frame 4 to the floor panel 3, and the member 5
, 5 and 6 and the floor panel 3, a closed space S is formed.

The engine 8 is connected to the frame 4 on the floor panel 3 side through the brackets 9, 9, for example, to the front and rear portions 4a, 4.
It is suspended and supported by a.

Furthermore, the sound absorbing material 10 is inserted into the closed space S by, for example, injecting urethane that foams at room temperature and filling it with foam.

Figure 3 is a cross-sectional view of the assembled state taken along line 3-3 in Figure 2.0 In the illustrated example above, the closed space was filled with foamed urethane, but a sound absorbing material may be interposed instead. .

By the way, only a part of the central opening 4e of the frame 4 is provided with the member 6, and the other part is open, and this corresponds to the opening of the floor panel 3, and when the lid 7 is opened, the main parts of the engine are located under this. , open the lid and perform maintenance such as inspection and repair of the carburetor, spark plug, etc.

According to the present invention as described above, the dish-shaped heat shielding member is attached to the lower surface of the floor panel using the frame, which is a reinforcing member, so that the heat insulation effect of the dish-shaped heat shield member and the heat insulation effect due to the existence of the space are double. By providing insulation, it is possible to prevent engine radiant heat from entering the passenger compartment as much as possible.

In addition, by interposing sound absorbing material in this space, noise from the engine and drive system is attenuated and absorbed, and even if the space is connected, vibration and noise can be prevented from interfering with this part by welding the surrounding area. It is possible to attenuate the noise by the action or the like and obtain a noise suppressing effect.

The dish-shaped heat shielding member described above can be installed together with the frame installation process, and does not require separate installation work from the frame installation work from the bottom of the floor panel, simplifying the installation work and simplifying assembly. It has good properties and is convenient for mass production.

Furthermore, since the frame and the dish-shaped heat shielding member are commonly attached, this member also serves as a reinforcing member, increasing the strength of the floor panel.
In addition to increasing rigidity, it is easy to process, lightweight, and because of the structure described above, it has the effect of making the space highly waterproof, making it highly practical.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a transparent perspective view of a vehicle showing a floor panel, Fig. 2 is an exploded perspective view, and Fig. 3 is a cross section taken along line 33 in Fig. 2 in an assembled state. It is a diagram. In addition, 3 in the drawing is a floor panel, 4 is a reinforcing member, 4e, 4g
, 4h is an opening, 41 is a flange, 5.6 is a dish-shaped heat shielding member, and 5a and 6b are flange parts.

Claims (1)

[Scope of utility model registration request] A reinforcing member made of a sheet metal press-formed product and joined to the lower surface of the floor panel has an opening, the periphery of this opening is formed into a flange, and a separate sheet metal press-formed product with an open upper part is formed. A dish-shaped heat shielding member is provided, the peripheral edge of the dish-shaped heat shielding member is formed into a flange portion, and the dish-shaped heat shielding member is fitted into the opening of the reinforcing member from above with the top open. The flange part of the thermal member is placed on the flange part of the reinforcing member, and the flange part of the reinforcing member on which the flange part of the dish-shaped heat shielding member is placed is joined to the lower surface of the floor panel, and the dish-shaped heat shielding member is attached to the floor panel. A vehicle floor structure characterized in that the upper part of the member is closed off and a sound absorbing material is filled in the closed space formed by the floor panel and the dish-shaped heat shielding member.