This application claims priority of European Application No. 23204622.7, filed Oct. 19, 2023, which is hereby incorporated herein by reference in its entirety.
The present disclosure relates to a to a load handling system, and also to a vehicle comprising such a system. Specifically, the load handling system is adapted for loading and unloading different types of load carrying objects, e.g. ISO 668 containers, and flat-rack containers, to and from the vehicle from the rear end of the vehicle.
In the past, and even nowadays, most of the hooklift container handling units have been equipped with an assembly of support device or devices, at the rear end of the hooklift, having e.g. a set of rollers or skids that has allowed ISO 668 containers and other load carrying objects to be safely pulled up on the vehicle during loading or pushed down the ground from the vehicle during unloading. During the use, the device(s) is heavily loaded and this has forced the structure of the device to be quite big in comparison to the space that is available at the rear end of the vehicle chassis, the hooklift system and container. This has led to situations where certain types, or combinations of, of containers or flat-rack containers have been difficult or impossible to handle for an assembly of support devices(s). Also, from an operator point of view, the big, manually operated components are heavy and slow to use and cause a safety risk in particular as the assemblies often needs manual operation to prepare for unloading or loading of a load carrying object. Furthermore, in case of military use, the trucks may be operated in a hostile environment where leaving an armored truck cabin may involve a big risk.
ISO 668 containers are containers according to an international standard which classifies intermodal freight shipping containers nominally, and standardizes their sizes, measurements and weight specifications.
Flat-rack containers or simply flatracks may have the same dimensions as their standard container counterpart. However, since these load carrying objects are open structures, which may only have walls on the short ends, their dimensions are based on an imaginary volume placed between the internal dimensions of the container.
In a commonly used structure, the rear end device comprises a rigid middle beam or mounting consoles that are mounted on the chassis, the chassis side, or directly on the hooklift arrangement. The beam or console may then include a pivotable joint that is perpendicular with the longitudinal centerline of a truck and/or hooklift, that allows container beds to rotate. This known structure is disclosed in EP1288067B1 that relates to a vehicle provided with a load handling system of a hook-lift type that is capable of loading a freight container or a flat-rack onto the vehicle. A pair of support devices at the rear of the vehicle have a first configuration in which they extend outwards such that rollers can support the outer lower side regions of the container during loading. The support devices can be pivoted about pivots in order to adopt a second configuration in which they point inwards so that some further rollers spaced close together now face upwards for supporting the central rails on the underside of a flat-rack container during loading. In the second configuration, the structure used to support the container during loading is stowed inwardly and below the rollers and thus does not impede the loading of the flat-rack.
In DE102015113283A1 is disclosed an interchangeable frame that is intended to accommodate certain types of interchangeable containers and is intended to supplement different commercial vehicle chassis from different manufacturers and vehicle types for this purpose. A modular system with several interchangeable frame units is provided, which can be bolted to the support frame of a commercial vehicle to provide the necessary support, guidance and attachment options for the desired types of swap bodies. EP3141421A1 relates to a semi-trailer provided with a front gooseneck part. A folding bolster assembly comprises a pair of support arms pivotally mounted on the front gooseneck part for movement between a folded stored position inboard of sides of the trailer body and an in-use position projecting laterally outwardly of the trailer body for engagement with and support of a container mounted on the trailer body.
The object of the present invention is to make it possible to operate a wider range of different types of bodies (e.g. flat-rack containers and ISO 668 containers) where the loading/unloading operation preferably may be performed without the operator needing to manually (e.g. by hand) adapt the setup of the load handling device mounted at the vehicle.
The above-mentioned objects are achieved by the present invention according to the independent claims.
Preferred embodiments are set forth in the dependent claims.
According to the invention, a load handling system is provided, arranged to be mounted to a vehicle and further arranged for supporting loading and unloading of load carrying objects, such as containers and flat rack containers, onto and from, the vehicle from the rear of the vehicle.
The load handling system comprises a frame arrangement comprising a mounting assembly arranged to be fastened to a vehicle frame at a rear end of the vehicle, and a first support member and a second support member. The first and second support members are arranged for supporting the underside of a first type of load carrying objects during loading and unloading.
In addition, the load handling system comprises a first folding structure and a second folding structure respectively connecting the mounting assembly with the first support member and the second support member, and that the first and second folding structures are configured to be moved between an unfolded position, and a folded position. The first and second support members are configured to be folded towards a longitudinal symmetry axis A1 of the vehicle, wherein in the unfolded position, the first and second support members are in their active position, and arranged to support the underside of the first type of a load carrying object during a loading/unloading procedure, and wherein in the folded position, the first and second support members are in their passive position, being a stowed position. In the stowed position, use of third support members is enabled. The third support members are arranged at the mounting assembly for supporting the underside of a second type of load carrying objects during loading and unloading of the second type of load carrying object.
Preferably, the first type of load carrying object is an ISO 668 container, and the second type of load carrying object is a flat-rack container.
By applying the load handling system according to the present invention, the operation of a wider range of load carrying objects including containers, and flat-rack containers, are possible to handle and the operation may preferably be performed without the operator needing to manually set the rear end device to a certain setup. For example, the operator may change the load handling system's configuration from flat-rack mode to container mode automatically from the truck cabin.
The load handling system, and the vehicle, will now be described in detail with references to the appended figures. Throughout the figures the same, or similar, items have the same reference signs. Moreover, the items and the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
With references to the figures, a load handling system 2 is disclosed, arranged to be mounted to a vehicle 4 and further arranged for supporting loading and unloading of load carrying objects 6, such as containers and flat-rack containers, onto and from, the vehicle 4 from the rear of the vehicle.
Containers are e.g. ISO 668 containers, i.e. containers according to an international standard which classifies intermodal freight shipping containers nominally, and standardizes their sizes, measurements and weight specifications.
A flat-rack container is usually for the transportation or storage of cargo with unique dimensions. Flat racks are open structures and may only have sides on the short side of the container, so the cargo can stick out the side of the container during transportation.
The load handling system 2 comprises a frame arrangement comprising a mounting assembly 8 arranged to be fastened to a vehicle frame at a rear end of the vehicle 2. The mounting assembly 8 may have an elongated shape and is structured to be fastened to the vehicle such that the longitudinal axis of the mounted assembly is perpendicular to a longitudinal symmetry axis A1 of the vehicle, see e.g.
The load handling system 2 further comprises a first support member 10 and a second support member 12, wherein the first and second support members are arranged for supporting the underside of a first type of load carrying objects during loading and unloading, and a first folding structure 14 and a second folding structure 16 respectively connecting the mounting assembly 8 with the first support member 10 and the second support member 10.
The first and second folding structures 14, 16 are configured to be moved between an unfolded position, and a folded position, and that the first and second support members 10, 12 are configured to be folded towards the longitudinal symmetry axis A1 of the vehicle 4.
In the unfolded position, the first and second support members 10, 12 are in their active position, and are arranged to support the underside of the first type of a load carrying object 6 during a loading/unloading procedure, and naturally also to support the first type of load carrying object when it has been loaded to the vehicle.
In the folded position, the first and second support members 10, 12 are in their passive position, being a stowed position, thereby enabling use of third support members 18 arranged at the mounting assembly 8 for supporting the underside of a second type of load carrying objects 6 during loading and unloading of the second type of load carrying object 6. And also, for supporting the second type of the load carrying object when it has been loaded to the vehicle.
In one advantageous embodiment, the first type of load carrying object 6 is an ISO 668 container, and the second type of load carrying object is a flat-rack container.
In one embodiment, the folding/unfolding movement is achieved by moving the first and second folding structures 14, 16 about a first and a second folding axle 20, 22, respectively, wherein these axles are parallel (see
In the unfolded position, the longitudinal directions of the elongated support members are essentially parallel.
In a further embodiment, the first and second support members 10, 12 are respectively connected to the first and second folding structures 14, 16 via a first and a second pivot axle 24, 26 and being rotatable in relation to the first and second folding structures 14, 16 about pivot pivot axles.
In still another embodiment, blocking members 28 are provided structured to limit the rotation of the first and second support members 10, 12 about their pivot axles 24, 26 to approximately 90 degrees, between a position where the supporting surfaces of the first and second support members 10, 12 are essentially vertical and a position where the supporting surfaces are essentially horizontal when the support members are in their unfolded position. The blocking members are shown in
According to another embodiment, each of the folding axles 20, 22 are at an angle V1, where 0<V1<45 degrees, in relation to the longitudinal symmetry axis A1 of the vehicle 4, and that each of the pivot axles 24, 26 are at an angle V2, where 0<V2<45 degrees, in relation to a longitudinal symmetry axis A2 of the folding structure 14, 16.
In
The angles V1 and V2 are chosen such that the extensions of the first and second support members 10, 12 in the rear direction of the vehicle 4 are less when the folding structures 14, 16 are in their folded positions than when they are in their unfolded position. Compare the rear extensions of the support members e.g. in
In still another embodiment, the horizontal level of first and second support members 10, 12 when they are in the active position, i.e. the unfolded position, is at higher level than the horizontal level of the third support members 18. The parts of the folding structures 14, 16 and of the first and second support members 10, 12 facing upwards when they are in the folded position are at a lower level than the horizontal level of the third support members 18. This aspect is clearly illustrated in
In another embodiment, the folding and unfolding movements of each of the first and second folding structures 14, 16 are arranged to be actuated by a respective actuator 30 controlling the folding/unfolding movements, and that the loading handling system 2 further comprises a control unit 32 configured to control the movements via control signals 34. The control unit 32 is shown in the block diagram of
Preferably, the actuator 30 is a linear actuator controlling the folding/unfolding movements with linear extensions, and that the control unit 32 is configured to control the linear extensions of the linear actuator via the control signals 34. The control unit 32 is configured to receive input instructions 38, from an operator via an input interface unit 36, e.g. mounted in the cabin of the vehicle, or automatically from an external unit 36 of an autonomous system.
The folding and unfolding operation may be performed manually, but advantageously the rotating movement is done via the actuator that turns the folding structure from container position to flat-rack position and vice versa. An actuator 30 is provided for moving each of the folding structures, and may preferably comprises a hydraulic cylinder connected to a gear wheel that is in connection with another gear wheel that is mounted to the folding structure. The gear wheels are shown in
The present invention also relates to a vehicle 4 comprising a load handling system 2 as described above. The vehicle is illustrated in
The present invention is not limited to the above-described preferred embodiments. Various alternatives, and modifications may be used. Therefore, the above embodiments should not be taken as limiting the scope of the invention, which is defined by the appending claims.
Number | Date | Country | Kind |
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23204622.7 | Oct 2023 | EP | regional |