FI64086B - BAKKANTSLYFTANORDNING FOER LASTBIL - Google Patents

Description

64086

The present invention relates to a truck stern crane, in which the lifting platform is attached to the rear of the truck frame by means of a lifting and control arm arrangement and hydraulic equipment driving the equipment, whereby the lifting level of the stern crane can be lowered to the ground and the load can be lifted. -the level of the floor surface of the platform or other conventional load compartment of the car or adjustable to any height position between the above positions, and in addition 10 tiltable and pivotable during transport against the rear wall of the platform or other load compartment or as a rear wall.

Previously known and in use stern thrusters work well with conventional pallets as well as load compartments. However, there are 15 specially designed load compartments in which the bottom surface of the load compartment is higher than normal. Such load compartments are, for example, thermally insulated containers used in the transport industry. When the truck is equipped with such a load space, where the bottom surface is higher than normal, the rear-mounted crane of the nor-20 paint structure cannot rise high enough. In this case, in practice, it is necessary to use various loose ramps, which are placed between the lifting level and the bottom surface of the load compartment whenever the lifting platform of the tail lift is raised to the upper position.

The object of the present invention is to obviate the above-mentioned drawback, and the truck stern crane according to the invention is mainly characterized in that part of the stern crane lifting platform plate surface is adapted to be raised upwards and at the same time forward to the upper plane connected to the lifting platform and its part adapted to be lifted from the plate surface are connected to guide members, such as roller guide guides or lever mechanisms, and a drive device 35, such as a cylinder piston device.

With conventional pallets and loads of pleasures, the stern crane according to the invention works in the same way as the previously known stern cranes. Instead, when a lift to a higher level is required, a ramp according to the invention can be used as an additional structure with a ramp rising up and forward from its plate surface, which eliminates the need to use various loose ramp plates or ramp-5 arrangements.

The invention will become more apparent from the following description and the accompanying drawings, in which Figure 1 shows an axonometric truck with a stern crane, the bottom surface of the load compartment being higher than normal and with the stern crane slide arrangement up and raised, and Figure 2 shows the same as Figure 1 but .

Figures 1 and 2 outline the rear of the truck, in which the rear of the truck body 3 has a lifting platform 1 fixed by means of a lifting and 15 control arm arrangement 2 and hydraulic equipment driving the equipment. The lifting platform 1 is adapted to be lowered to the ground and lifted to the level of the bottom surface of the car platform or other normal shell space or adjustable to any height-20 position between the above positions. The lifting plane 1 can also be tilted, as can be seen from the dashed line in Figure 2. In addition, the lifting platform 1 can be turned against the rear wall of the pallet or other load space or into the rear wall during transport. Since a stern crane of the above-mentioned type 25 and equipped with the above-mentioned functions is completely conventional and commonly used, it is not necessary to describe its structure in more detail in this connection.

As can be seen from the figures, the bottom surface 5 of the load compartment is higher than the level of the normal load compartment located in the plate surface 6 of the lifting platform 1 in its upper position. Thus, a clear step is formed between the bottom surface 5 of the load space 4 and the plate surface 6 of the lifting platform 1. Furthermore, the bottom surface 5 of the load compartment 4 does not extend all the way to the rear end of the load compartment, but normally in special types of thermally insulated containers issa the thermally insulated structure in the load compartment doors requires the formation of said step at the rear of the load compartment 5. The step mentioned makes it considerably difficult to transfer the load 64086 3, for example on wheeled transport wagons, from the lifting platform 1 to the load space 4 and vice versa.

To eliminate the problem in the arrangement according to Figs. Thus, the plate surface part 7 forms a ramp leading from the plate surface 6 of the lifting platform 1 to the bottom surface 5 of the load space 4 10. As can be seen from Fig. 2, guide members are connected between the lifting platform 1 and the part 7 adapted to be lifted from its plate surface 6. In Fig. 2, roller guide guides 8, 9 are shown as an exemplary structure. The guides 8 are located in an oblique position in the base beams 12 of the lifting plane 1 according to Fig. 2. They are in a different inclined position to make the movement of the plate 7 desired. Below the plate part 7, rollers 9> are arranged, which move in said guides 8. In addition, a cylinder piston device 10 is connected as a drive device according to Fig. 2 between the lifting platform 1 and its part 7 to be lifted from the plate surface 6. As the cylinder piston device 10 the plate surface part 7 can be moved up and forward to the position of Figures 1 and 2 as a gangway and back to the plane of the plate surface. In Figures 25 1 and 2, the part 7 adapted to be lifted from the plate surface 6 is relatively narrow and is located in the middle of the front edge of the lifting platform 1. Of course, within the scope of the invention, the plate surface part 7 to be raised can be located equally well on one or both sides of the lifting platform 1 or can be, for example, the entire plate of the lifting platform. Instead of the roller guide arrangements 8, 9, the guide members connected between the lifting platform 1 and the part 7 adapted to be lifted from its plate surface 6 may consist of lever mechanisms or other devices suitable for this purpose.

In the truck-mounted crane structure according to the invention, the part 7 of the lifting platform 1 must always be in the lowered position, i.e. in the plane of the plate surface 6, during the lifting and lowering of the lifting platform 1. The load is therefore placed at the bottom

It solle Ϊ, the lifting platform 1 is raised to its upper position, the plate surface part 7 of the lifting platform 1 is lifted by the cylinder piston device 10 under the control of the guide members is moved from the lifting platform 1 to the load space 4} the plate surface part 7 is lowered by means of the cylinder piston device 10 and guided down by the guide members to the plate surface 6 of the lifting platform 1, after which the lifting platform 1 can be lowered to retrieve a new load or turned up during transport against the rear wall or as a rear wall.

Claims (1)

A stern crane for a truck, wherein the lifting platform (1) is attached to the rear of the truck frame structure (3) by means of a lifting and control arm arrangement (2) and hydraulic equipment driving the equipment, whereby the lifting platform (1) of the stern crane is lowerable to the ground and to be raised to the level of the floor of a lorry platform or other conventional load compartment or to a height between the above positions and also tiltable and pivotable during transport against or as a rear wall of a platform or other load compartment, characterized in that part (7) the ramp of the lifting platform (1) of the stern crane is adapted to be lifted upwards and at the same time forwards on a ramp leading to the level of the bottom surface (5) of the load compartment (4) 15 and above the lifting surface (1) control members are connected between the fitted part (7), e.g. such as roller-to-de-arrangements (8,9) or lever mechanisms and an actuator such as a cylinder piston device (10).