FI67332C - ANORDNING FOER ATT UTSTOETA ETT VIRKESKNIPPE ELLER LIKNANDE LAT FRAON ETT FORDON - Google Patents

Description

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Device for dropping a bundle of timber or a similar load from a vehicle

The present invention relates to a device for dropping a load of timber or a similar load of round timber, in particular bundled round timber, from a vehicle at the place of unloading.

At the beginning of the round timber transport route, the timber is usually bundled into bundles corresponding to the full load of the vehicle, such as a truck, for the next transport period. The bundles are transferred by vehicles to the waterway, where they are dropped off the vehicle at special unloading points, either directly into the water or on ice in winter. Larger centralized unloading sites usually have cranes efficient enough to lift the timber bundles from the vehicle into the water or a similar receiving site.

However, it makes sense to place the unloading points at several different points along the route, so that it does not make sense to install large bundle cranes at these, often temporary unloading points, but to have the bundles dropped from vehicles by other means.

In practice, it has been shown that a fresh, round bundle of timber falls quite easily off the vehicle after the load-retaining side posts have been triggered out of the way. Namely, the fresh and relatively heavy logs move quite easily at the top of the bundle, from which the side support has been removed, relative to each other in the direction of fall, causing the bundle's center of gravity to shift over the drop edge of the vehicle and fall off the vehicle.

67332

Instead, problems at this drop stage are caused by relatively dry and light logs that do not roll or slide significantly relative to each other, even if the lateral support on one side is removed. The simplest solution to this problem would be to unpack the bundle and roll the logs separately down from the load, possibly utilizing a winch-driven wire used to lift the logs onto the load and to tie the load during transport, as explained e.g. In SU patent publication 410 994. However, unloading a bundle ready for swimming just at the edge of the swimming route cannot be considered meaningful, and the bundle should be dropped as a whole.

Purkauskaikoille is therefore built in the direction of travel, unilateral raised edges to which the second side of the vehicle wheels can be driven. In this case, the vehicle is tilted in the direction of fall, which helps the bundle to fall off the top of the vehicle.

This method has also been found to be insufficient in some cases, or the tilting ramps have to be made so high that the vehicles are damaged during use. Especially in winter, there is a risk that the vehicle's axles will break due to frost brittle axle material.

To solve this problem, lifting devices have been installed in the vehicles, with which the bundle of timber can be lifted to such an inclined position that it rolls under its own weight from the top of the vehicle.

Such a device usually consists of a hydraulic cylinder-piston device mounted on one side of the vehicle or in its vicinity, fixed at one end to the vehicle body and at the opposite end to a beam acting as a bundle-raising member extending substantially transversely to the vehicle. The other end of the beam is articulated to or in the vicinity of the drop side of the vehicle. With such a device, it is possible to provide the vehicle with a tilting platform for tilting the bundle in the direction of fall, along which the bundle rolls or slides out of the vehicle when the tilting becomes sufficiently large.

This device is sure to get an awkward bundle off the top of the vehicle, but the device has its own drawbacks due to the way the device works. First, when operating such a device, it is essential that the device be able to lift a substantial portion of the total bundle weight n 3 67332 quite high before the device is sufficiently tilted into the bundle support and the bundle rolls or slides along the support from the vehicle. The lifting device and the tilting lever or tilting arm connected to it must thus be made quite strong and the lifting device also has a high lifting capacity.

Disadvantages of such a known device can be substantially reduced by the device according to the invention, in which the rigid tilt lever or tilt arm is replaced by a flexible lifting member attached at one end to the vehicle and at the opposite end to the lifting end of the hydraulic cylinder-piston device.

With the device according to the invention, when lifting a bundle of timber or a similar load, the lifting member bends according to the shape of the curved lower edge of the rising bundle. In this case, as the lifting progresses, the lifting member pulls the hydraulic cylinder-piston device which is fixed to be tilted towards the lowering direction, and the device provides a considerable lowering force component in addition to the lifting force. The device thus tends to rotate the bundle in the lowering direction, whereby the required lifting force and, correspondingly, the lifting distance for lowering the bundle remain substantially smaller for lowering the bundle from the load than if the lifting member 3 were rigid. As a result, the drop device can be made much lighter than previously used

The device according to the invention is characterized by what is clear from the characterizing part of the claim.

The invention is clarified on the basis of the accompanying schematic diagram, in which the device is shown in its initial position, i.e. in its transport position with solid lines and in the drop phase with broken lines.

The drop device consists of a hydraulic cylinder-piston device 1 articulated to the car, its trailer or _ -. r- 4 67332 to the longitudinal frame beam 2 of the corresponding transport device. The fastening joint 7 allows the cylinder to turn substantially in the transverse direction of the transport device. The lugs of the joint 7 are part of a mounting bracket 6 which can be detachably attached to the frame beam 2. The opposite end of the hydraulic cylinder piston device is attached to a flexible lifting member 3, which may be a chain or a wire. . This fastening 8 is also preferably detachable, so that the device can be moved in the longitudinal direction of the vehicle to a suitable place according to the length of the timber in the bundle.

In the drawing, the device is shown in its transport position in solid lines, whereby the end of the retracted piston is located substantially below the outer edge of the bundle to be transported. Bundles of dropping is triggered side posts drop side (not shown in the drawing) out of the way and hydraulisylinte-bis- one pressurized. In this case, the end attached to the lifting member 3 of the piston starts to rise and rises along a curved path determined by the direct distance between the attachment points of the lifting member 3. This distance decreases immediately from the initial stage of lifting as the weight of the bundle is pressed by the arc of the lifting member. As a result of this deflection, the rising end of the piston tends more strongly in the direction of fall than if the lifting member 3 were rigid. Thus, immediately at the initial stage of the lifting movement, the drop-side lifting force component becomes substantially larger than when the rigid lifting member 3 is used, resulting in a kind of rotational movement in the bundle 9, in its drop direction,

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In the embodiment shown, the hydraulic cylinder-piston device X is shown attached to the bracket 6 so that the lower end of the cylinder is somewhat below the body and somewhat in the direction of fall from the edge opposite the drop edge of the vehicle. The cylinder-piston device is thus at an angle of approximately 45 ° to the vertical, inclined away from the direction of fall. With this initial position of the cylinder-piston device, it has been found that the lifting and horizontal forces develop in a ratio favorable to the fall as the lifting progresses. However, it is entirely within the scope of the invention that the hydraulic cylinder piston device 1 is fixed to an initial position similar to, for example, the side post 5, whereby the lifting member 3 provides a parallel scrolling and pushing effect on the bundle 9.

The hydraulic cylinder-piston device is preferably double-acting, so that the piston can be pressed hydraulically to its initial position after dropping. However, this is not necessary, and the piston can be pushed to its initial position by hand even after the pressure has been released from the cylinder.

Kohotuselimen alternative 3 point of attachment may also be, for example, attaching it to the edge of the drop-side of the vehicle, such as poikittaispankoon two or four transverse pankoa connecting the longitudinal beam.

Claims (1)

67332 Claim: A device for dropping a bundle of timber or a similar batch of goods from a vehicle by lifting the bundle, the device comprising a hydraulic cylinder piston device (1) for lifting and a coupled member (3) for lifting the bundle freely pivoting into the vehicle body (2), extending below it, in the direction of fall from a distance opposite the falling edge of the vehicle so that the opposite end of the retracted hydraulic cylinder piston device is substantially below the opposite edge of the timber bundle or similar batch 1) is in its retracted position approximately 45 * inclined away from the vertical in relation to the vertical plane; and at its other end to a bundle lifting member (3), which member is further articulated to the vehicle in the dropping direction at a distance from the attachment point of the hydraulic cylinder piston device, characterized in that the lifting member (3) the lifting member (3) pulls the end of the hydraulic cylinder-piston device (1) to which the lifting member is attached in the dropping direction, providing a rotating effect on the bundle in the dropping direction.