JPS6337306Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a freight vehicle.

In the vehicle shown in FIG. 1, a horizontal loading platform 2 is mounted on a chassis frame 1 of a vehicle, and this horizontal loading platform 2 is connected to a hydraulic cylinder (not shown) disposed between the center of the lower surface of the horizontal loading platform 2 and the chassis frame 1. It moves back and forth by expansion and contraction, and a tilting platform 4 is connected to the rear edge of the horizontal platform with a hinge fitting 3 so as to be tiltable up and down.
The tilting loading platform 4 is mounted on the chassis frame 1 when the horizontal loading platform 2 is in the forward position,
Furthermore, when the horizontal loading platform 2 is in the reverse position, a conventionally known freight vehicle is provided with a tilting bridge between the ground G and a downwardly inclined part K provided at the rear end of the chassis frame 1 that tilts downwardly toward the rear. be.

In this freight vehicle, numeral 5 denotes a rail extending along the longitudinal direction of the chassis frame 1 and having a cross-section shaped like the letter 5, with its opening facing toward the side. 6
is a roller disposed on the lower surface of the horizontal loading platform 2 and rolls within the rail 5. 7 is horizontal loading platform 2
This is a winch device installed at the front end of the top surface.
Reference numeral 8 denotes a roller disposed on the lower surface of the tilting platform 4. The roller 8 rolls on the horizontal part and the downwardly inclined part K of the chassis frame 1, and the roller 8 rolls backward on the downwardly inclined part K. When the rear end portion of the tilting platform 4 moves to , the rear end portion of the tilting platform 4 lowers its position. When loading cargo onto the horizontal loading platform 2, the horizontal loading platform 2 is moved backward as shown in FIG. A hook block 10 that moves along with the movement of the rope 9 is hung on a self-propelled heavy machine or the like. Next, the self-propelled heavy machinery and the like are loaded onto the horizontal loading platform 2 by winding the rope 9 using the winch device 7.

When loading this cargo, the load acting on the winch device 7 is
Since the roller 6 is intended to be tilted upward with the hinge fitting 3 as the center of rotation, the roller 6 located furthest forward among the rollers 6 may come into pressure contact with the upper surface of the rail 5, causing the rail 5 to be deformed. It was hot.
In addition, when the center of gravity of a heavy object such as the self-propelled heavy machinery is located behind the roller 8 disposed on the bottom surface of the tilting platform 4, the tilting platform 4 uses the roller 8 as a fulcrum. Since the hinge fitting 3 tends to move upward due to the rotational force, the roller 6 closest to the hinge fitting 3 among the rollers 6 is pressed against the upper surface of the rail 5, and there is a risk that the rail 5 may be deformed. It was hot.

The purpose of the present invention is to prevent this type of deformation of the rail 5 from occurring, and is constructed as follows.

That is, the freight vehicle of the present invention has a horizontal loading platform in which a rail having a U-shaped cross section is disposed along the longitudinal direction on the chassis frame of the vehicle, and rollers that roll within the rail are disposed on the lower surface of the rail. is mounted on the chassis frame so as to be movable back and forth, and a tilting loading platform is connected to the rear end edge of the horizontal loading platform so as to be tiltable up and down using a hinge, and a tilting loading platform is mounted on the top surface of the tilting loading platform behind the rail. A roller is disposed that rolls on a downwardly inclined portion of a chassis frame which is tilted downwardly toward the rear, and when the horizontal loading platform is in the forward position, the tilting loading platform is mounted on the chassis frame and the horizontal When the loading platform is in the backward position, a tilting bridge is formed between the downward tilting part and the ground, and in this tilting bridge state, a rope is fed out rearward from a winch device provided on the top surface of the horizontal loading platform to the top of the tilting loading platform. In a freight vehicle for loading heavy objects such as self-propelled heavy machinery, slide plates are disposed in front and rear positions of the rollers disposed on the lower surface of the horizontal loading platform, the slide plates slidingly contacting at least the inner circumferential upper surface of the rail. It is configured as follows.

Next, the present invention will be explained in detail based on a specific embodiment shown in FIGS. 2 and 3. 2' is a horizontal joist extending in the horizontal direction, 2'' is a vertical joist extending vertically at right angles to this horizontal joist, and 2 is a horizontal joist 2'
This is a horizontal loading platform floor plate arranged on the upper surface, and the horizontal loading platform floor plate 2, the horizontal joist 2', and the vertical joist 2'' form the horizontal loading platform 2. 11 is a rectangular parallelepiped-shaped stride plate support. It is disposed on the vertical joist 2'' in a state facing the opening of the rail 5. Reference numeral 12 denotes slide plates fixed to the upper and lower surfaces of the slide plate support and the side surface facing the rail 5, respectively. As shown in FIG. 2, the slide plates 12 are disposed at the front and rear ends of the loading platform, sandwiching the rollers 6 therebetween. Note that 13 is a support for supporting the rail 5 on the chassis frame 1, and a plurality of supports are provided at a predetermined distance in the front-rear direction.

Next, the action will be explained.

In the state shown in FIG.
is driven in the winding direction. Then, a force sufficient to pull up the self-propelled heavy machinery, etc. acts on the winch device 7, and the front end of the horizontal loading platform 2 tries to lift upward about the hinge fitting 3. The slide plate 12 provided on the upper surface side of the slide plate support 11 is connected to the rail 5.
At this time, in the case of the previously known rollers mentioned above, the rollers are in line contact with the rail 5, so there is a problem that the contact pressure of the rail 5 is high and the rail 5 is deformed. However, in the present invention, since the slide plate 12 is used to support the load through surface contact, the contact pressure of the rail 5 is reduced, and the problem of deformation of the rail 5 does not occur.

Next, when the center of gravity of the heavy object such as the self-propelled heavy machinery is located behind the roller 8 disposed on the lower surface of the tilting platform 4, the tilting platform 4 has the roller 8 as a fulcrum. As a result of the rotational force acting on the hinge metal fitting 3, the hinge metal fitting 3 tends to lift upward. For this reason, the slide plate 12 provided on the upper surface side of the slide plate support 11 in the rail 5 and closer to the hinge fitting 3 is pressed against the inner circumferential upper surface of the rail 5, but the slide plate 12 supports the load by surface contact. As a result, the contact pressure of the rail 5 is reduced, and the problem of deformation of the rail 5 unlike in conventionally known roller supports does not occur.

As described in detail above, in the present invention, rollers are disposed on the lower surface of the horizontal loading platform, and slide plates are disposed in front and rear positions of the rollers so as to be in sliding contact with at least the inner circumferential upper surface of the rail. Since the plate moves on rails arranged along the longitudinal direction of the chassis frame, it ensures smooth movement back and forth of the horizontal loading platform, and the rails and slide plate move when loading cargo. This has the effect that the rail does not deform because the contact pressure with the rail is low. This effect is achieved.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventionally known truck, FIG. 2 is a side view of a truck showing an embodiment of the present invention, and FIG. 3 is a sectional view taken along line H--H in FIG. 1; Chassis frame, 5; Rail, 6; Roller, 2; Horizontal loading platform, 3; Hinge fittings, 8; Roller, 4; Tilting loading platform, K; Downward tilting portion, 7; Winch device, 9; Rope, 12; slide plate.

Claims (1)

[Scope of utility model registration request] A rail shaped like a cross section is arranged along the longitudinal direction on the chassis frame of the vehicle, and a horizontal loading platform with rollers arranged on the lower surface that rolls within the rail is moved back and forth on the chassis frame. A tilting loading platform is mounted movably and connected to the rear end edge of the horizontal loading platform so as to be tiltable up and down with a hinge, and a shear is provided on the underside of the tilting loading platform behind the rail and tilts backward and downward. A roller is installed that rolls on the downward slope of the frame, and this tilting loading platform is
mounted on a chassis frame when the horizontal loading platform is in the forward position, and providing a tilting bridge between the downward tilting part and the ground when the horizontal loading platform is in the backward position;
In this tilting bridge state, a freight vehicle is configured to load heavy objects such as self-propelled heavy machinery onto the tilting platform via a rope fed out rearward from a winch device provided on the top surface of the horizontal platform, A freight motor vehicle, characterized in that slide plates are disposed in front and rear positions of the rollers disposed on the lower surface of the horizontal loading platform, the slide plates slidingly contacting at least the inner circumferential upper surface of the rail.