JPH04159144A - Motor truck - Google Patents

Abstract

PURPOSE:To prevent the leap and fall of a lift frame off a body in a motor truck with its body possible to be down horizontally on the ground for loading by fixing a leap preventing 'device, engaged with the lift frame vertically, to the rear part of the body. CONSTITUTION:In the case of loading a load, for instance, an automobile, a lift cylinder 11 is contracted to slide a lift frame 3 backward on a hinge roller 7 as well as to tilt the lift frame 3 backward. At this time, even if the lower end of the bent part 6 of the lift frame 3 collides with an obstruction protruding on the ground, the lift frame 3 is prevented from being lifted in relation to a truck body since a leap preventing device 14 is engaged with the lift frame 3 vertically, so that the lift frame 3 is prevented from falling off the truck body. A hydraulic motor is then driven to run a driving sprocket provided at the front end of a body 5 so as to slide the body 5 backward and to lower the front end of the body 5 along the bent part 6. A tail gate 31 is then brought down into the horizontal state to load the automobile onto the body 5.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a truck whose body can be lowered horizontally onto the ground and loaded with cargo.

[Conventional technology]

As a freight vehicle, recently proposed by the applicant,
As shown in Figure 7.8.9, there is one in which the body is lowered horizontally to the ground and cargo is loaded thereon. First of all, this freight vehicle has a chassis frame 61 shown in FIG.
A lift frame 6 is mounted on a vehicle body consisting of a sub-frame 62 and has a downwardly bent bent portion 66 on the rear end side.
3 is attached to the rear end of the vehicle body by a lift frame drive means consisting of a lift cylinder 71 and a lift arm 68, so that the rear end is lowered while sliding backward with respect to the vehicle body, as shown in FIG. It is tilted using the hinge roller 72 as a fulcrum. Then, the bent portion 66 of the lift frame 63 comes into contact with the ground or is positioned very close to the ground. Thereafter, the tenon 65 is slid rearward along the lift frame 63 by a podium driving means (not shown) provided on the lift frame 63, and the front end of the podium 65 is moved along the bent portion 66 on the rear side of the lift frame 63. The POD 65 is lowered almost horizontally onto the ground as shown in FIG. 9. Next, the cargo is loaded onto the podium 65 which has been lowered horizontally onto the ground and secured. Thereafter, the body driving means is driven to raise the tenon 65 along the bent portion 66 of the lift frame 63, and further slide the podium 65 forward along the lift frame 63. Thereafter, the lift frame 63 is returned to a horizontal state by the lift frame driving means.

[Problem to be solved by the invention]

However, in the above truck, as shown in Fig. 7.8.9, the lift frame 63 is only connected to the vehicle body at the front side via the lift arm 68 and the lift cylinder 71, When there are irregularities on the road surface, the rear part of the lift frame 63 and the podium 65 fly up from the vehicle body, and then they collide with each other, causing damage to the lift frame 63, the vehicle body, and the podium 65 due to this impact. In addition, when the lift frame 63 is slid rearward and tilted to unload the cargo loaded on the podium 65, the lift frame 63
When the lower end of the bent portion 66 collides with a book on the ground, the stress applied to the lower end of the bent portion 66 causes the lift frame 63 to be lifted from the rear with respect to the vehicle body, causing the lift frame 63 to fall off from the vehicle body. There is also the issue of danger. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to allow the podey to be lowered horizontally to the ground to load cargo, and to prevent the lift frame from flying up or falling off the vehicle body while driving or loading/unloading cargo. The purpose is to provide a freight vehicle that can prevent such problems.

[Means to solve the problem]

In order to achieve the above object, a freight vehicle of the present invention includes a vehicle body, a vehicle mounted on the vehicle body so as to be tiltable and slidable,
A lift frame having a bent portion bent downward toward the rear end side, and a flap fixed to the rear of the vehicle body so as to vertically engage with the lift frame to prevent the lift frame from jumping upward. a climbing prevention device; a lift frame driving means for tilting and sliding the lift frame with respect to the vehicle body; The present invention is characterized by comprising a podium that becomes substantially horizontal when the podium is lifted, and a body driving means for sliding the podium relative to a lift frame.

[Effect]

The lifting prevention device fixed to the rear of the vehicle body engages the lift frame in the vertical direction to prevent the lift frame from lifting up, so the lift frame will not be lifted off the vehicle body due to uneven road surfaces while driving. The lift frame and podium will not be damaged by collision with the vehicle body. Furthermore, since the anti-jumping device and the lift frame are engaged in the vertical direction, when the lift frame is tilted while sliding backward, the lower end of the bending part of the lift frame touches the book on the ground. Even in the event of a collision, the lift frame is not lifted from the rear side relative to the vehicle body, and the lift frame is prevented from falling off from the vehicle body.

【Example】

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments. In Fig. 1.2, 1 is a shearn frame, 2 is a subframe, 3 is a lift frame, and 5 is a podium. The chassis frame 1 and the subframe 2 constitute a vehicle body. The lift frame 3 has a bent portion 6 bent diagonally downward on the rear end side. As shown in Figure 3,
The lift frame 3 can slide and tilt along a hinge roller 7 provided below the rear end of the subframe 2. In addition, the upper g self-soft frame 3
One end of the lift arm 8 is pivotally connected to the lower side of the subframe 2, and the other end of the lift arm 8 is pivotally connected to the front end side of the lift arm 8. The other end of the lift cylinder 11 is pivotally connected so that the lift frame 3 can be slid rearward along the hinge roller 7 and the rear end can be tilted downward by the operation of the lift cylinder II. . Since one end of the lift arm 8 is pivotally connected to a lower position of the sub-frame 2, the maximum inclination angle of the lift frame 3 and the body 5 can be reduced, and the tilting of the lift frame 3 and the body 5 can be made small. can be done safely. Further, as shown in FIG. 5, on the rear side of the subframe 2, there is a spring-up prevention device 14 that engages with the lift frame 3 in the vertical direction to prevent the lift frame 3 from springing up.
is fixed. As shown in FIG. 6, the spring-up prevention device 14 includes an engaging member 35 having a U-shaped cross section that engages with a portion of the lift frame 3 that has a U-shaped cross section;
It consists of a shock absorbing pad 36 fixed to the engagement surface of 5. Then, as shown in FIG. 3, the lift frame 3
The engagement surface of the anti-skipping device I4 is inclined downward from the front to the rear in accordance with the angle of inclination when the device is tilted backward to the maximum. As shown in FIG. 2, the lower end of the bent portion 6 at the rear end of the lift frame 3 is almost in contact with the ground when the lift frame 3 is slid backward to the maximum extent and tilted. The lift arm 8 and the lift cylinder II constitute a lift frame driving means. On the other hand, a body guide roller 12 is provided at the boundary between the bending part 6 and the horizontal part of the lift frame 3.
The body 5 is allowed to slide on the lift frame 3 while being guided by the rollers 12. The body 5 has a structure shown in FIG. 4 so as to be slidable. That is, one end is fixed to the front end of the lift frame 3, and the other end is fixed to the front end of the lift frame 3.
A chain 19 fixed to the rear end is connected to a driving sprocket 18 and an idler 2 provided at the front end of the body 5.
It is wound to 0.21. The sprocket I8 is driven by a hydraulic motor (not shown) fixed to the body 5. Therefore, by causing the sprocket 18 to travel along the chain 19 by driving the hydraulic motor, the body 5 can slide over the entire lift frame 3 including the bending portion 6. The above sprocket 18, idler 20, 21 and chain I
9 and the hydraulic motor constitute a body driving means. Moreover, as shown in FIG. 1.2, at the rear end of the body 5,
A chill gate 31 which also serves as a roller 29 and a footboard is provided. Further, a vertical plate 40 is provided at the front end of the body 5. The freight vehicle having the above configuration is loaded with cargo, such as a car, as follows. First, assuming that the truck is in the state shown in FIG. 1, the lift cylinder 11 is contracted, and the lift frame 3 is slid backward on the hinge roller 7 via the lift arm 8, and is also tilted backward. At this time, even if the lower end of the bending part 6 of the lift frame 3 collides with a paper object protruding from the ground, the spring-up prevention device 14 fixed to the rear part of the sub-frame 2 will prevent the lift frame
are engaged in the vertical direction, so the lift frame 3
The lift frame 3 is not lifted up relative to the vehicle body, and the lift frame 3 can be prevented from falling off the vehicle body. Next, the hydraulic motor is driven to cause the driving sprocket 18 provided at the front end of the body 5 to run along a chain 19 stretched along the lift frame 3, and the hydraulic motor and sprocket 18 are connected to the body. 5 is slid rearward along the lift frame 3, and the front end of the body 50 is lowered along the bending part 6. At this time,
The roller 29 at the rear end of the body 5 is in contact with the ground, and the body 5
smoothly retreat from the ground. Note that at this time, the chill gate 31 is standing. In this way, during the process of the body 5 sliding rearward, the rear end and center of the body 5 are supported by the roller 12 provided on the rear side of the lift frame 3. When the body 5 is lowered the most along the bent portion 6 of the lift frame 3, the state is as shown in FIG. 2. In this state, the body 5 is lowered almost horizontally onto the ground. Then, the chill gate 31 is laid down horizontally and the car is loaded onto the body 5. In this way, since the car is loaded onto the horizontal body 5, the driver does not have to worry about answering the questions.
It is possible to move the car forward to the very edge of the front end of 5.
A car can be easily mounted on the body. Further, when the driver gets out of the car, the body 5 is horizontal on the ground, so the driver can get out of the car without any danger. Furthermore, when a car or other cargo is loaded onto this horizontal body and secured, it is easy to secure the cargo because the body 5 is in a horizontal state, and there is no risk of the cargo coming loose. do not have. Furthermore, since the cargo is loaded onto the body in a horizontal state in this manner, the cargo can be easily loaded onto the body 5 not only from the rear but also from the side. Next, the hydraulic motor is driven to first raise the tenon 5 along the bent portion 6 via the sprocket 18 and chain 19, and then slide it forward along the lift frame 3. At this time, the lower end of the bent portion 6 of the lift frame 3 comes into contact with the ground due to the weight of the automobile, and the bent portion 6 of the lift frame 3 serves as a support member to prevent the vehicle from rolling backward. After moving the body 5 sufficiently forward onto the lift frame 3,
The lift cylinder 11 is extended to return the lift frame 3 to a horizontal state via the lift arm 8, and is slid forward with respect to the sub-frame 2 to bring it into the state shown in FIG. The spring-up prevention device 14 fixed to the rear part of the sub-frame 2 is connected to the lift frame 3.
Since the lift frame 3 is engaged in the vertical direction with the vehicle body, even if the lift frame 3 tries to jump up from the vehicle body due to unevenness of the road surface while driving, the lift frame 3 can be prevented from jumping up from the vehicle body, and the lift frame 3 and the vehicle body and It is possible to prevent damage caused by collision with the body 5, and also to prevent cargo loaded onto the body 5 from falling off. Furthermore, even if the bent portion 6 of the lift frame 3 collides with an obstacle on the ground when the lift frame 3 is slid and tilted backward, the anti-jump device 14 is connected vertically to the lift frame 3. Since they are engaged in the direction, the lift frame 3 can be prevented from being lifted from the rear side with respect to the vehicle body, and the lift frame 3 can be prevented from falling off from the vehicle body. Furthermore, the engagement surface of the anti-jumping device 14 is sloped downward from the front to the rear in accordance with the angle of inclination when the lift frame 3 is tilted backward to the maximum. The spring-up prevention device 14 can be most closely engaged with the lift frame 3 within a range that does not impede the sliding and tilting of the lift frame 3, thereby increasing the spring-up prevention effect. Further, since the pad 36 fixed to the engagement surface of the anti-jump device 14 absorbs the force of the collision transmitted from the lift frame 3 during the collision, it is possible to suppress the force from being transmitted to the vehicle body. In the above embodiment, the body driving means is a hydraulic motor. Chain 19. Although the body driving means is configured with the sprocket 18, etc., the body driving means is not limited to this, and may be configured with a lobe, a pulley, or the like. Further, in the above embodiment, the lift frame driving means is composed of the hydraulic cylinder '11 and the lift arm 8, but the lift frame driving means is not limited to this. It may be something. Further, although the lift frame 3 is made slidable onto the subframe 2, it may be made slidable onto the chassis frame l if the subframe 2 is not provided. Furthermore, although the hydraulic motor is attached to the body 5, it may be attached to the lift frame 3.

【Effect of the invention】

As is clear from the above explanation, in the freight vehicle of the present invention, the bounce-up prevention device fixed to the rear of the vehicle body engages with the lift frame in the vertical direction. The frame can be prevented from flying up from the vehicle body, and damage to the lift frame, body, and vehicle body can be prevented. Further, even if the lower end of the bent portion of the lift frame collides with an impact object on the ground when the lift frame is tilted while sliding rearward, a spring-up prevention device that engages with the lift frame in the vertical direction However, the lift frame can be prevented from being lifted from the rear with respect to the vehicle body, and the lift frame can be prevented from falling off from the vehicle body.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams of the operation of a freight vehicle according to an embodiment of the present invention, Figure 3 is an explanatory diagram of the operation of the lift frame of the above embodiment, and Figure 4 is an enlarged view of the main parts of the body drive means of the above embodiment. figure,
FIG. 5 is a view showing the spring-up prevention device that engages with the lift frame of the above embodiment and its surroundings, FIG. 6 is a sectional view of the spring-up prevention device that engages with the lift frame, and FIG.
Figure 8.9 is an explanatory diagram of the operation of a conventional freight vehicle. 1.61...Chassis frame, 2.62 Subframe, 3.63...Lift frame, 5.65...Body, 6
．． 66...Bending portion, 7.72...Changing roller, 8.
68・Lift arm, 14・Spring prevention device, 35・Engagement member, 36・
·pad.

Claims (1)

[Claims] (1) a vehicle body; a lift frame that is tiltably and slidably mounted on the vehicle body and has a downwardly bent bent portion on the rear end side; a rear portion of the vehicle body that is vertically engaged with the lift frame; a lifting prevention device that is fixed to the lift frame and prevents the lift frame from lifting upward; a lift frame driving means that tilts and slides the lift frame with respect to the vehicle body; , characterized by comprising a body that is raised and lowered by sliding along the bending portion and becomes substantially horizontal when lowered to the ground, and a body driving means that slides the body with respect to the lift frame. Freight car.