JPS6348751B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a loading platform device for a vehicle.

Conventionally, in a truck that has a structure in which a vertical wooden joist installed at the bottom of the loading platform is mounted on a chassis frame, the lower end of the center pillar of the torii installed at the front of the loading platform is connected to the vertical joist by bolts, etc. They are simply connected via a fastening member. For this reason, the bonding force between the torii and the vertical joist is weak, and if a truck loaded with cargo on its platform collides head-on with another vehicle while driving, the cargo will move toward the torii due to the inertia force generated in the cargo, causing the torii to move toward the torii. There was a risk that the cargo would be pushed toward the front of the vehicle and collide with the cab, causing injury to the cab occupants.

Moreover, in Japanese Utility Model Application Publication No. 50-83712, a vertical joist and a torii are connected via a first energy absorption device,
Furthermore, a technique is disclosed in which an L-shaped front plate is provided to partition the loading platform, and is connected via a second energy absorbing device to a floor plate whose one side is fixed to a torii gate and the other side is fixed to a vertical joist.

In this case as well, when the vehicle collides head-on while traveling, the cargo collides with the torii, and the torii moves forward of the vehicle, so that the inertial energy of the cargo is absorbed by the first and second energy absorption devices. In order to protect the cab, it is necessary to leave a sufficient gap between the cab and the torii gate, and if the gap is made large, there is a problem that the loading platform space becomes smaller in general trucks where the overall length of the vehicle is regulated.

The present invention has been devised for the purpose of solving the above-mentioned problems. Reinforcing members with mounting bolt through holes drilled in the bottom wall of the same cross-sectional shape are attached to both sides of the front part of the vertical joist via bolts, and the front part of the loading platform is formed at the front end of each of the reinforcing members. The lower ends of the torii center pillars are fixed, lumber is attached to the loading platform side of each of the torii middle pillars, one end is brought into contact with the cargo loaded on the loading platform, and the other end is connected to the timber via bolts. The gist of this article is ``a loading platform device for a vehicle that is characterized by being equipped with a shock absorber in the form of a hollow cone that can easily buckle under the moving load of cargo.''

Next, the present invention will be specifically explained based on examples. First, in the first and second figures, reference numeral 1 is a chassis frame, 2 is a floor plate of a loading platform, 3 is a horizontal joist,
4 is a wooden vertical joist installed at the bottom of horizontal joist 3;
Reference numeral 5 indicates a steel central pillar of a torii gate 6 which forms part of the loading platform and is provided at the rear of the cab (not shown); 7 indicates a steel reinforcing member attached by bolts 8 to both sides of the front part of the vertical joist 4; and the lower end of the middle pillar 5 are welded to each other. Further, reference numeral 9 denotes a reinforcing bracket that is connected to the center column 5 side through a bolt 10 and to the reinforcing member 7 side through a bolt 11, respectively. Reference numeral 12 denotes a shock absorbing device provided on the back surface of the central column 5, and as shown in FIGS. Four elongated holes 16, which are long in the direction orthogonal to the longitudinal axis of the base body 15, are bored in parallel at intervals on each side of the base body 15, and the width of the elongated holes 16 is narrowest at the longitudinal center portion 16'. , are formed so as to gradually increase toward both ends.

Further, the longitudinal edges 18 near the top of each long hole 16 are arranged so as to protrude inward from the side surfaces, such as a plate 19 between each long hole 16 on each side surface, a plate 20 located above the uppermost long hole 16, and a plate 20 located above the uppermost long hole 16, and a plate 20 located above the uppermost long hole 16 and a plate 20 located above the uppermost long hole 16, A plate 21 located below the elongated hole 16 is bent at a predetermined angle with respect to each side. This shock absorber 12 is connected to the bolts 2 through timbers 22, 23, and 24 that have a shock absorbing effect.
5 is attached to the middle pillar 5. In this way, the cargo 25 is loaded onto the floor plate 2 while coming into contact with the base plate 13 of the shock absorber 12.

In addition, between the chassis frame 1 and the vertical joist 4, a V-shaped locking member or a U-bolt, which is a known means per se, is appropriately installed, so that the relative relationship between the two 1 and 4 during normal use is Constrain displacement.

Since the device of this embodiment is configured as described above, when a vehicle loaded with cargo on the floor plate 2 collides with the vehicle, the cargo 25 is displaced forward due to inertia, causing the shock absorber 12 to move in the direction of the arrow G to a value greater than or equal to a predetermined value. When an impact force is applied, the device 12 buckles and absorbs some of the inertial energy. Due to the remaining inertial energy that could not be absorbed due to this buckling deformation, the cargo 25 further moves forward toward the torii gate 6.
Even if the torii gate 6 collides with the torii gate 6, the torii gate 6 can be effectively prevented from being pushed down in the direction of the cab because the middle pillar 5 is fixed to the vertical joist 4 via the reinforcing member 7.

Therefore, in the present invention, when absorbing collision energy,
Since the loading platform does not move, the shock absorber only needs to absorb the inertial energy of the cargo, which allows the shock absorber to be made smaller and makes it easier to calculate the set energy absorption amount of the shock absorber, making it more effective. This has the effect of making it easier to create a shock absorber.

In addition, as described above, in the present invention, the reinforcing member 7 is attached to the vertical joist 4, and the center column of the torii gate is connected to this to strengthen the bonding force, so even if cargo collides with the torii gate, the reinforcement member 7 is attached to the vertical joist 4.
A situation in which the torii gate tilts toward the cab side can be smoothly avoided, and the safety of the cab occupants can be ensured. Furthermore, the present invention provides, upon absorption of collision energy,
Since the cargo platform does not move, the gap between the rear end of the driver's seat and the front end of the cargo platform can be reduced.

This is because the length of the loading platform can be increased by the amount that the gap between the rear end of the driver's seat and the front edge of the loading platform is reduced. This has the effect of ensuring a loading capacity close to that of a general loading platform that is not equipped with a loading platform.

[Brief explanation of the drawing]

FIG. 1 is a side view of one embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is an energy absorber 21.
FIG. 4 is a sectional view taken along the - line in FIG. 3. 1: Chassis frame, 4: Vertical joist, 5: Center column, 7: Reinforcement member.

Claims (1)

[Claims] 1. In a vehicle in which a wooden vertical joist installed at the bottom of a loading platform is fixed on a chassis frame, a reinforcing member formed with a substantially U-shaped cross-section and having mounting bolt through holes drilled in the bottom wall of the same cross-section. are attached to both sides of the front part of the vertical joist via bolts, and the lower end of the torii center pillar forming the front part of the loading platform is fixed to the front end of each of the reinforcing members, and A hollow cone shaped body is attached with a piece of lumber, and one end touches the cargo loaded on the loading platform, and the other end is connected to the lumber via a bolt, making it easy to buckle and deform under the moving load of the cargo. A loading platform device for a vehicle, characterized in that it is equipped with a shock absorbing device.