# US 12,759,646 B2 · Vehicle body floor structure

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- Number: US 12,759,646 B2
- Document ID: US12759646B2
- Status: Granted
- Kind: B2
- Application number: 18/964,914
- Filed: 2024-12-02
- Published: 2025-03-20
- Granted: 2026-10-13
- Earliest claimed: 2023-03-29
- Assignees: Subaru Corporation
- Applicants: Subaru Corporation
- Inventors: Hiroyasu Ito; Yuya Mukainakano; Masaharu Noguchi; Shohei Kanemitsu
- Web page: https://patentgrep.com/patent/US12759646B2

## CPC

- B62D 29/043: {Superstructures (B62D25/161 takes precedence)}
- B62D 25/20: Floors or bottom sub-units {(sub-frames for mounting engine or suspensions B62D21/11; drip trays F16N31/006)}
- B62D 27/065: {using screwthread (connection of crossbeam to A- pillars B62D25/147; mounting load bearing surfaces B62D21/09; securing mudguards B62D25/163; connections for synthetic parts B62D29/048)}
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)

## Abstract

A vehicle body floor structure includes a panel base member made of a fiber-reinforced resin composite material, and continuous fiber-reinforced resin bands. Each of the resin bands is provided with coupling portions at ends and include a continuous fiber sewn onto the panel base member. The coupling portions are individually coupled to other structural members of the panel base member. The resin bands include at least one longitudinal band disposed along a vehicle longitudinal direction, at least one widthwise band disposed along a vehicle width direction, and at least one inclined band disposed in a direction partially or entirely intersecting the vehicle longitudinal direction and the vehicle width direction. The inclined band includes a part disposed along the vehicle longitudinal direction or the vehicle width direction, and another part bent from the first part and disposed in a direction intersecting the vehicle longitudinal direction and the vehicle width direction.

## Claims

### Claim 1

A vehicle body floor structure made of a fiber-reinforced resin composite material, the vehicle body floor structure comprising:
a panel base member made of a fiber-reinforced resin composite material; and
continuous fiber-reinforced resin bands, each of which is provided with a first coupling portion and a second coupling portion at respective ends and includes a continuous fiber sewn onto the panel base member, the first coupling portion and the second coupling portion being individually coupled to other structural members of the panel base member, wherein
the continuous fiber-reinforced resin bands comprise:
at least one longitudinal band disposed along a vehicle longitudinal direction;
at least one widthwise band disposed along a vehicle width direction; and
at least one inclined band disposed in a direction partially or entirely intersecting the vehicle longitudinal direction and the vehicle width direction, and
the at least one inclined band comprises:
a first part disposed along the vehicle longitudinal direction or the vehicle width direction; and
a second part bent from the first part and disposed in a direction intersecting the vehicle longitudinal direction and the vehicle width direction.

### Claim 2 (depends on 1)

The vehicle body floor structure according to claim 1, further comprising:
a winding member provided to each of the first coupling portion and the second coupling portion, and around which the continuous fiber is wound, wherein
the continuous fiber is wound around the winding member provided to each of the first coupling portion and the second coupling portion, and is disposed in such a way as to move back and forth between the first coupling portion and the second coupling portion multiple times.

### Claim 3 (depends on 2)

The vehicle body floor structure according to claim 2, wherein the winding member is used in a coupling structure that couples the vehicle body floor structure to the other structural members.