JPH0212125Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reinforcing structure for a seat belt attachment portion of a vehicle.

[Conventional technology]

Demand for double-deck cab type trucks, which are used to transport workers and equipment to remote construction sites, is limited, so the rear of a typical single cab has been expanded to include a rear seat. There is. Therefore, since many of the components are the same as those used in single-cab trucks, the tensile strength of the seat belt attachment portion of the rear seat is not sufficient.

Simply attaching a reinforcing plate of an appropriate thickness to the floorboard of the cab and fixing and supporting the seat belt at this location will not allow the safety belt to be pulled in the event of a collision, especially at the seat belt attachment point for the rear center seat, which seats three people. It may be deformed by the load or come off the floorboard.

Japanese Unexamined Patent Application Publication No. 127263/1983 proposes a T-shaped plate that is overlapped and joined to the inner surface of the floor tunnel and the lower surface of the floor of the rear seat.
This method aims to strengthen the entire floorboard using letter-shaped reinforcing plates to increase the support rigidity of the anchor bolts, which increases costs in terms of the amount of materials used and assembly.

[Problem that the invention attempts to solve]

In view of the above-mentioned problems, the purpose of the present invention is to provide a reinforcing structure for the seat belt attachment part of a vehicle, which compensates for the lack of strength by connecting the seat belt attachment part to a strong vehicle body part by adding simple parts. There is a particular thing.

[Means for solving problems]

In order to achieve the above object, the configuration of the present invention is to connect a horizontal member with a closed cross section to the lower surface of the seat belt attachment part of the floorboard of the cab, and to attach longitudinal plates to a pair of front and rear horizontal members that reinforce the cargo bed. Both ends of a shock absorbing member made of a U-shaped wire that spans and connects the board and straddle the board are fixed to the horizontal member of the floor board.

[Effect]

The impact load that acts on the seat belt at the time of a collision is supported by the horizontal members 12 and 13 of the cargo bed, which have high strength, from the horizontal member 9 of the floor plate 2 through the impact absorbing member 15.
The lack of strength of the floorboard 2 of the cab is resolved.

[Example of idea]

As shown in Fig. 1, the floor plate 2 that supports the rear seat of a double-deck cab type truck has a floor surface 2a that is raised one level in order to obtain an appropriate seat cushion height at the rear end. It is raised and the floor surface 2a
A seat (not shown) is placed directly on top of the seat.

Six holes 3 are provided on the floor surface 2a to support the anchor bolts of seat belts for three seats.
A rear end portion of the floor plate 2 is defined by a rear wall plate 4. A cargo box 20 is attached to the vehicle body behind the cab and independently of the cab.

As shown in FIG. 2, a reinforcing plate 5 bent into an inverted L-shaped cross section is provided on the back side of the rear floor surface 2a of the floor plate 2.
Then, a horizontal member 9 having a closed cross section formed by combining reinforcing plates 8 bent into an L shape and bonding them together is attached. The end portion of the seat belt 7 is fixed to the reinforcing plate 5 and the floor surface 2a with bolts 6.

The cargo box 20 has side wall plates including a front wall plate 11 and a bottom plate 10.
A horizontal member 12 called a bolster having a U-shaped cross section is connected to the lower surface of the bottom plate 10 at a predetermined interval in the front-rear direction.
2 is connected to the vehicle body.

A lateral member 13 made of a plate having a crank-shaped cross section is disposed at the rear front edge of the bottom plate 10 of the cargo box 20, and the front wall plate 11 is coupled to the floor plate 10 via the lateral member 13.

According to the present invention, the plate material 14 is stretched between the horizontal members 13 and 12 called bolsters of the packing box 20,
and are joined by welding or the like. As shown in FIG. 3, the board 14 is approximately L-shaped, and the vertical wall portion
4a are joined by overlapping the vertical wall surfaces of the horizontal member 13.

As shown in FIG. 2, a shock absorbing member 1 made of a wire bent into a substantially U-shape that straddles a plate 14
Brackets 18 are connected to both ends of 5. A bracket 18 is superimposed on the horizontal wall portion of the reinforcing plate 8 and is connected with bolts 19.

As shown in FIG. 4, the shock absorbing member 15 is made by bending both ends of the central bridging portion 17 that straddles the plate material 14 in parallel, bending it into a V-shape from the bending portion 16 in the middle, and attaching brackets 18 to both ends by welding. Constructed by combining.

Since the present invention is constructed as described above, the rear part of the floorboard 2 of the cab is reinforced by the horizontal member 9 which has a closed cross section and is composed of the reinforcing plate 5 and the reinforcing plate 8, and the load of the seat belt 7 is supported by the horizontal member 9. be done. When the horizontal member 9 is pulled up and deformed in the direction of arrow X due to the excessive load of the seat belt 7, the shock absorbing member 15
The central bridging portion 17 of the carrier hits the plate material 14 and is received by the horizontal members 13 and 12 of the loading platform.

Therefore, the amount of deformation of the cab floor plate 2 is determined by the distance between the bridge portion 17 of the shock absorbing member 15 and the horizontal and vertical walls 14a of the plate material 14, and the angle of the bent portion 16. Deformation of surface 2a is minimized.

Although a wire may be used for the shock absorbing member 15, using a bar eliminates the problem that the shock absorbing member 15 hits the plate material 14 due to vibrations of the vehicle body and generates noise.

It goes without saying that the present invention can also be applied to single cab type trucks.

[Effect of idea]

As mentioned above, the present invention connects the floorboard of the cab to the lower surface of the seat belt attachment part with a horizontal member that forms a closed cross section, and connects the floorboard of the cab by spanning a pair of front and rear horizontal members that reinforce the cargo bed. , both ends of a shock absorbing member made of a U-shaped wire that spans the board are fixed to the horizontal member of the floorboard, and the horizontal member of the cab floorboard and the horizontal member called the bolster of the loading platform are connected by the shock absorbing member. Therefore, the excessive load acting on the seat belt is ultimately supported by the cargo bed side, which has high rigidity and strength, and deformation of the floorboard is minimized.

In addition, it is easy to manufacture because it only requires fixing a shock absorbing member made of a bar or the like to the middle part of the horizontal member, which is structurally the weakest, and providing a plate material that engages with the shock absorbing member on the loading platform side. Costs are kept to a minimum.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the inside of a double deck cab to which the seat belt attachment part according to the present invention is applied;
Figure 2 is a side sectional view of the seat belt attachment part;
The figure is a perspective view of the plate material attached to the loading platform, and FIG. 4 is a perspective view of the shock absorbing member. 2: Floor plate, 2a: Rear floor surface, 3: Anchor bolt hole, 9, 12, 13: Lateral member, 14: Board material, 1
5: Shock absorbing member, 20: Packing box.

Claims (1)

[Scope of utility model registration request] Front and rear 1. A horizontal member with a closed cross section is connected to the underside of the seat belt attachment part of the cab floorboard to reinforce the cargo bed.
A seat belt for a vehicle, characterized in that plate members in the front and rear directions are spanned and connected to a pair of horizontal members, and both ends of a shock absorbing member made of a U-shaped wire rod that straddles the plate members are fixed to the horizontal members of the floor plate. Reinforced structure of the mounting part.