NL2022895B1

NL2022895B1 - Dock leveler with adjustable side-elements, docking station and distribution center provided therewith and method there for

Info

Publication number: NL2022895B1
Application number: NL2022895A
Authority: NL
Inventors: Hoekstra Hains
Original assignee: Stertil Bv
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2020-10-15
Also published as: FR3094705B1; GB2584784A; FR3094705A1; GB2584784B; GB202005152D0; DE102020109838A1

Abstract

The present invention relates to a dock leveler with adjustable side-elements, docking station and distribution center provided therewith, and method for loading and/or unloading goods 5 to/from a vehicle. The dock leveler according to the invention comprises: — a platform that can be positioned for adjustment to the height of a cargo space of the vehicle, wherein the platform comprises a main platform and a lip that is configured for partly moving into the cargo space of the vehicle; — a lifting drive for positioning the platform in height and a lip extension drive for 10 positioning the platform between a resting state and a loading state wherein goods can be loaded and/or unloaded to/from the cargo space of the vehicle; wherein the lip of the platform comprises a central lip element and one or more side-elements that are configured for moving over an adjustable distance.

Description

DOCK LEVELER WITH ADJUSTABLE SIDE-ELEMENTS, DOCKING STATION AND

DISTRIBUTION CENTER PROVIDED THEREWITH AND METHOD THERE FOR The present invention relates to a dock leveler for a docking station. Such docking station is often part of a distribution center that is configured to receive a truck, a (delivery) van and/or a trailer for loading and/or unloading goods including packages, parcels, consumable materials and finished products.

Conventional dock levelers are often provided in a pit or recess of the docking station. Such dock levelers are capable of carrying loads, including fork lift trucks that are used for moving these loads in and out of the cargo space of a truck, for example. A dock leveler is disclosed in WO 2016/1373 15 that specifically discloses a dock leveler with a rolling cover.

To position a dock leveler correctly, the platform of the dock leveler is often raised and an extendable part, also referred to as lip or tip, is (partly) positioned in the cargo space of the truck or other vehicle. This extendable part often comprises plates that are capable of sliding relative to each other.

Conventional distribution centers, and therefore the docking stations and dock levelers thereof, are more and more confronted with different vehicle types loading and/or unloading goods. More specifically, (delivery) vans of different types and dimensions are used to deliver goods from a distribution center directly to consumers. Therefore, the dock levelers have to be capable of handling different transport means such as forklift trucks, ride-on pallet trucks, electric pallet trucks, manual pallet trucks and manual (hand-held) loading/unloading in combination with dealing with different vehicle types. In practice, this causes accidents leading to personal injuries and/or it causes damage to goods.

An object of the present invention is to obviate or at least reduce some of the above problems and to provide a flexible and safe dock leveler.

This object is achieved with the dock leveler for loading and/or unloading goods to/from a vehicle, with the dock leveler according to the invention comprising: - a platform that can be positioned for adjustment to the height of a cargo space of the vehicle, wherein the platform comprises a main platform and a lip that is configured for partly moving into the cargo space of the vehicle; - a lifting drive for positioning the platform in height and a lip extension drive for positioning the platform between a resting state and a loading state wherein goods can be loaded and/or unloaded to/from the cargo space of the vehicle, wherein the lip of the platform comprises a central lip element and one or more side-elements that are configured for moving over an adjustable distance.

The dock leveler according to the invention is configured for enabling loading and/or unloading goods to/from a vehicle by bridging the floor of the docking station with the cargo space of the vehicle. These vehicles may include a truck, a (delivery) van and/or a trailer. Goods can be loaded/unloaded with the aid of transport means, such as fork lift trucks, ride-on pallet trucks, electric pallet trucks, manual pallet trucks, and even manual/hand-held delivery of goods to/from the vehicle. Such dock leveler is implemented in a docking station that is often part of a distribution center having a numbers of these docking stations. Such docking station is also referred to as a dock or dock house and can be provided with a (insulating) dock shelter.

The dock leveler according to the invention comprises a platform enabling loading and/or unloading to and/or from a vehicle. The platform comprises a main platform and a lip that is configured for partly moving into the cargo space of the vehicle. Such vehicle may relate to a truck, a (delivery) van and/or a trailer. Such vehicles may have different heights of the cargo space floor. For example, in case of a truck this height is typically in the range of 1000-1200 mm, and in case of a van typically in the range of 350-400 mm. This illustrates the desired flexibility for the dock leveler according to the invention. The platform is positioned with the lifting drive and a lip extension drive to bring the lip (partly) into the cargo space of the vehicle and adjust the position of the leveler to the height of the cargo space floor. Preferably, the platform is hingedly connected to a frame or other structural element, for example a part of the dock. The platform is moveable with the lifting drive. The lip extension drive is configured for extension of the lip of the platform at least partly into the cargo space of the vehicle. The lifting drive and the lip extension drive are configured for moving the platform between a resting state in which the leveler is preferably retracted, and a loading state in which goods can be loaded and/or unloaded to/from the cargo space of the vehicle. In the loading state transport means, such as a fork lift truck, use the platform to bridge the floor of the dock with the cargo space floor of the vehicle. The lifting drive and/or lip extension drive may use translational and/or rotational movement(s) for positioning the platform using an electrical, pneumatic, hydraulic cylinder or any other suitable means to position the platform or its components. The dock leveler according to the invention is provided with main platform and a lip that comprises a central lip element and one or more side elements that are configured for moving over an adjustable distance in the direction to and from the vehicle. In a presently preferred embodiment the central lip element is provided with a width such that the central lip element can be positioned into the cargo space of a wide range of vehicles, typically in the range from a trailer/truck to a (delivery) van. In such a presently preferred embodiment on both sides of the central lip element there is provided a side-element. The side-element or elements are configured for moving over an adjustable distance. In case of loading/unloading a truck the side-elements may fully extend and provide a lip with its maximum width, i.e. the sum of widths of the central lip element and side elements.

The central lip element and side-elements can be (jointly) positioned into the cargo space of the truck.

In case of a smaller (delivery) van, having a cargo space with a relatively smaller width as compared to the truck, the side-clements are not fully extended.

Preferably, only the central lip element is positioned into the cargo space.

This provides the flexibility to the dock leveler according to the invention for being used in combination with different types of vehicles.

A further advantage of providing side-clements that are configured for moving over an adjustable distance is that the gap between the leveler and the sidewalls of the vehicle can be substantially closed.

This gap is present in a loading state of the platform when the central lip element is positioned in the cargo space of the vehicle and the side-elements are fully retracted.

The dimensions of this gap are partly determined by the configuration of the vehicle.

For example, vehicle doors that are opened over a rotation angle of about 180° require more space as compared to vehicle doors that can be opened over about 270°. Also the absence or presence of a tow bar and/or the position of the brake lights can be relevant, for example.

Providing side-elements that are configured for moving over an adjustable distance allows significant closure of the gap between the leveler and the vehicle.

This closure significantly reduces the risks of injuries and damaging of goods and transport means.

Therefore, the capability of moving the side-clements over an adjustable distance in the direction to and from the vehicle enables sufficient closing of the gap between the leveler and the vehicle.

For example, in a loading state of the leveler, the lip of a leveler extends over a distance of 19-15 cm into the cargo space of the vehicle.

The use of adjustable side-elements limits the gap between the vehicle and the leveler to about 10 cm or less.

It will be understood that other dimensions can also be envisaged in accordance to the invention.

For example, these dimensions may depend on the specific type of vehicle.

In a presently preferred embodiment the dock leveler relates to a so-called telescopic tip/lip leveler having a telescopic lip that can be positioned into the cargo space of the vehicle.

The central lip element and the side-elements preferably extend from below the main platform in a sliding movement to enable positioning the lip relative to the cargo space of the vehicle.

The use of side-elements could alternatively be applied to other type of dock levelers, including so-called swing tip or swing lip levelers having a rotatable lip part that can be (partly) positioned into the cargo space of a vehicle and is configured for maintaining the transition surface between the platform and the cargo space substantially horizontal.

It will be understood that also other types of levelers or combinations thereof can be provided with the side-elements that are configured for moving over an adjustable distance.

In a presently preferred embodiment the dock leveler according to the invention further comprises a side-element drive mechanism that is configured for enabling movement of the one or more side-elements relative to the main platform.

Providing a side-element drive mechanism enables movement of the side-elements relative to the main platform. This movement may involve a fully extension of the side-elements into the cargo space of the vehicle and fully retracting the side-elements in a resting state of the dock leveler. Preferably, this movement can be performed jointly with the central lip part. In addition, and in accordance to the present invention, these side-elements can be moved over an adjustable distance. This adjustable distance enables sufficient closing of the gap between the leveler and the vehicle as a precautionary measure to prevent injuries and damage. The presently preferred side-element drive mechanism can be selectively coupled to the lip extension drive. This has the advantage that a single drive is capable of moving the central lip element and the side- elements jointly or separately.

In a first configuration, the gap/distance between the side-elements and the van or truck is determined or measured. In this configuration, preferably, central lip element moves over a distance equal to the gap/distance. Then, side-elements are unlocked and movement of side- elements is coupled to movement of central lip element. After correctly positioning central lip element into the cargo space, the side-elements substantially cover the gap/space between the leveler and the van or truck.

In a second configuration, central lip element and side-elements start extending jointly. When it is detected that the side-elements approach the vehicle too closely movement of side- elements is stopped, while central lip element is positioned into the cargo space of the van or truck.

In a presently preferred embodiment according to the invention the side-element drive mechanism comprises a locking device and locking elements that are configured for locking and/or unlocking the one or more side-elements with the central lip element to selectively couple movement of these one or more side-elements with the central lip element.

Enabling a selective coupling and/or uncoupling between the movement of the side- elements and the central lip part provides an effective and efficient extendable lip. In fact, this enables effective closing of the gap between the leveler and the vehicle in case of vehicles having a smaller width as compared to the maximum width of the leveler. In addition, this selective coupling is achieved with a cost effective dock leveler that is relatively simple, thereby limiting maintenance and/or the risk of malfunctioning.

In a presently preferred embodiment the locking drive comprises a cylinder acting on the locking elements with the locking elements being configured for engaging the one or more side- elements. In a locking state the locking elements engage the side-elements and may prevent movement of the side-elements. In this locking state the central lip element can be extended independently from the side-elements. When the locking elements disengage, the side-clements preferably move jointly with the central lip element. It will be understood that during extension of the central lip element the side-elements can be locked over a part of this extending movement and can be unlocked over the remaining part of the extending movement, as in the aforementioned first configuration. This means that the side-elements are moveable into positions between a fully retracted and a fully extended position, thereby significantly closing the gap between the leveler and the vehicle under substantially all circumstances. Preferably, the cylinder of this locking drive 5 is attached to the rear hinged part of the leveler platform.

In a presently preferred embodiment the dock leveler further comprises a catch or cam element that is configured for moving the one or more side-elements jointly with the central lip element. These catch or cam elements may involve pens, pawls, plates and other suitable elements. Preferably, this catch or cam element is adjustable to limit the stroke of the side element(s). This IO can be achieved by flexible positioning of the catch or cam elements relative to the moveable side- elements. For example, the position of the catch or cam elements can be chosen in relation to the vehicle that is expected to be loaded/unloaded. This adjustment can be done automatically or manually.

Alternatively, or in combination, the side-element drive mechanism comprises a side- element drive for moving the one or more side-elements. This enables independent controlling and/or monitoring of movement of these side-elements.

In a further preferred embodiment of the invention the one or more side-elements comprise a distance sensor configured for measuring the distance between the one or more side- elements and the vehicle.

Providing a distance sensor enables monitoring of the gap between the side-elements and the vehicle. Optionally, the sensor is used to control the movement of the side-clements. This control can be achieved by the use of independent/separate drives for the side-elements and/or selectively coupling/uncoupling movement of the side-clements with the central lip element with the use of the measurement information. This may enable operation in the aforementioned second configuration. This improves the overall safety of the dock leveler according to the invention and further reduces the risk of injuries and/or damage.

In a presently preferred embodiment of the invention the dock leveler further comprises a dock leveler controller that is configured for detecting and/or selecting a platform condition enabling or disabling the use of the side-elements.

Providing a dock leveler controller enables effective control and/or monitoring of the actual use of the dock leveler. This may involve selecting the appropriate settings of the dock leveler, such as the distance of movement of the side-elements in relation to the (expected) vehicle that requires loading and/or unloading. Preferably, the controller comprises a selector, such as a selector switch or button, wherein the selector is configured for selecting a platform condition enabling or disabling the use of the side-elements. When a user or operator notices/confirms the presence of a truck, van or other vehicle at the dock, this person puts the selector in the correct position thereby enabling or disabling the use of the side-elements such that the width of the platform is adjusted to the vehicle type. Alternatively, or in addition thereto, this selection is automated, for example by using a detector that determines the vehicle type when a vehicle is docking at the dock.

In another preferred embodiment the dock leveler is provided with a vehicle detector that is configured for detecting the vehicle type. For example, when extending the leveler the vehicle detector may detect the sides of a van such that the side-elements are retracted or simply stop extending. This may obviate the use of a separate selector or selector switch and provide the dock teveler with information about the required platform conditions.

In a presently preferred embodiment the controller of the dock leveler further comprises a support detector that is configured for detecting whether the lip of the leveler is being supported by the vehicle. In use, in the loading state of the dock leveler, the dock leveler rests with its lip on the floor of the cargo space of the vehicle. The support detector detects this support and may provide a signal to the controller. Optionally, this provides a clearance signal that generates an unlock signal such that the leveler is ready for use. Optionally, the dock leveler further comprises a lock configured for locking or unlocking the leveler in response to a lock or unlock signal. Providing the leveler with a lock preferably requires unlocking the leveler for its use. This enables control of the use of the dock leveler. The lock or unlock signal can be generated by the controller of the dock leveler, either automatically or manually. Optionally, this signal is generated by a central controller. This lock may involve a so-called software lock disabling activation of the dock leveler and/or a hardware lock such as control valves, clamps etcetera that lock the leveler against undesired/unauthorized use.

In a further preferred embodiment the controller is configured for detecting an overload and/or presence of unauthorized transport device on the platform.

By detecting an overload an unsafe situation may be obviated or is monitored such that appropriate actions can be taken. In addition, or as an alternative thereto, the use of unauthorized transport devices can be detected such that warnings or other suitable actions can be taken. This contributes to the overall safety when working with the dock leveler for loading and/or unloading goods from/to the vehicle. This measurement can be performed using one or more sensor, such as an inclination sensor, a load sensor and/or an infrared sensor for the vehicle. It will be understood that other suitable sensors can also be envisaged in accordance with the present invention.

In a further preferred embodiment of the invention the leveler comprises an inclination sensor that is configured for measuring the angle of inclination of the platform. Such inclination sensor may measure the angle with respect to a horizontal position such as the floor using different measurement principles, such as capacitance differences that can be converted into a measurement signal, using sensors that are based on so-called mems technology and/or hall principles. It will be understood that other suitable sensor types can also be applied in the dock leveler of the invention.

The inclination sensor measures the angle of inclination of the platform relative to the horizontal/floor. In case of trucks or trailers this angle is often positive such that transport means pass over the ascending platform into the cargo space. In case of (delivery) vans the transport means are usually confronted with a declining platform when moving into the cargo space. This is caused by the different heights of the cargo space above the ground surface.

In a presently preferred embodiment of the invention the sensor is a so-called inclinometer. These inclinometers have proven to be generally robust and may provide an effective means to measure the angle of inclination of the platform. The sensor is preferably attached to the platform. As a further advantage this also enables a stand-alone application of the leveler with a minimum of disturbance acting on the measurement signal. Furthermore, in combination with the controller and warning system this sensor also enables the application to a conventional dock leveler. This increases the applicability of the leveler.

The dock leveler according to the invention further comprises a controller with a warning system. This controller with a warning system is configured for receiving a measurement from the inclination sensor and determines the type or types of transport means that are allowed (authorized) to be used in the loading state of the platform. The controller with a warning system compares the measured angle of inclination of the platform with the specifications for the individual transport means. A warning (information) signal is provided to a user or operator to wam/inform this user or operator of the transport means what transport means are allowed for use with the leveler in the specific loading state for loading and/or unloading goods to/from the cargo space of vehicle. This prevents the use of undesired or unauthorized transport means that could result in situations that are unsafe. Therefore, the controller with warning system improves the overall safety when working with the dock leveler according to the invention by preventing personal injuries and/or damaging the goods.

In a preferred embodiment of the invention the warning system comprises a display. Such display gives the possibility to provide the user/operator with a warning or information signal about the transport means that can be used in the specific loading state of the dock leveler. This display can be provided on a monitor that is provided in the vicinity of the dock leveler and/or in an operator room and/or on a smart watch or tablet of the driver/user of the transport means. This assures that the user/operator is provided with the appropriate warming or information when intending to use the dock leveler of the invention. This display can be used with other audio or visualizing sub-systems. The display can also be used to visualize the distance between the leveler and the vehicle.

The present invention also relates to a docking station comprising such dock leveler, and a distribution center comprising at least one docking station.

Such docking station and/or distribution center provide similar effects and advantages as described in relation to the dock leveler.

Optionally, the dock may comprise a dock monitoring system that comprises the dock leveler in an embodiment of the invention.

For example, the monitoring system may comprise a dock door controller that is configured for partially opening a dock door, positioning the platform, and then further opening the dock door.

Preferably, this enables partially opening the door and then correctly positioning the platform of the dock leveler before further opening, such that the dock door controller enables an improved sealing of the dock conditions against the outside environment.

This is especially relevant for cold storage, for example.

The invention further also relates to a method for loading and/or unloading goods to/from a vehicle, the method comprising the steps of: - providing a dock leveler according to an embodiment of the invention; - moving the leveler into a loading state; and - loading and/or unloading the cargo space of the vehicle.

The method provides similar effects and advantages as described in relation to the dock leveler, dock monitoring system, docking station and/or distribution center.

Further advantages, features and details of the invention are elucidated on the basis of preferred embodiments thereof, wherein reference is made to the accompanying drawings, in which: - Fig. 1 illustrates a docking station with a dock leveler according to the invention; - Fig. 2 A-C illustrates the dock leveler of Fig. 1 with fully extended lip (Fig. 2A), partly extended lip (Fig. 2B). and a detailed view of the gap between the leveler and the vehicle (Fig. 2C); and - Figs. 3-6 illustrate a presently preferred embodiment of the dock leveler according to the invention with a side-element drive mechanism.

The following description is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

While the disclosure is described as having exemplary attributes and applications, the present disclosure can be further modified.

This application is therefore intended to cover any variations, users, or annotations of the disclosure using its general principles.

Further, this application is intended to cover such departures from the present disclosure as commonly known or customary practice of the skilled in the art to which this disclosure pertains and which fall within the limits of the appended claims.

Accordingly, the following description of certain embodiments and examples should be considered merely exemplary and not in any way limiting. With reference to the figures, alike element numbers refer to the same or similar elements between drawings.

Distribution center 2 (Figure 1) comprises a number of docks or docking stations 4. In the illustrated embodiment each dock is provided with shelter 6, door 8, seals 10, barrier 12 and bumper 14. In the illustrated embodiment dock 4 further comprises dock leveler 16. Dock leveler 16 is provided with load cell 18 for measuring the loads that are loaded and/or unloaded, inclination sensor 20 to measure the (angular) position of leveler 16, vehicle detector 19 to detect the vehicle type at the dock, support detector 21 to detect that the leveler rests on the floor of the vehicle's cargo space, and transport means detector 23 that detects the presence of transport means IO on leveler 16. Door 8 is provided with one or more door position sensors 22 to detect the position of door 8. Barrier 12 is provided with status sensor 24.

In the illustrated embodiment dock 4 is provided with vehicle locking system 26 that comprises guide track 28, carriage 30 guided by guide track 28, wherein carriage 30 is provided with locking means 32 for blocking wheel 34 of truck 36. Locking member 38 is provided on carriage 30 for releasably locking carriage 30 relative to guide track 28. Displacing means 40 are provided for displacing carriage 30 relative to guide track 28. Preferably, locking system status sensor 41 is provided to detect the status of locking system 26. LED lights 42 of truck docking assistance system 44 assist a driver of truck 36 when docking truck 36. In the illustrated embodiment assistance system 44 further comprises camera 51 for detecting truck positions and/or vehicle type, signaling light 48 for further assisting the driver of truck 36, and projector 47 for projecting signals, such as arrows 49, on the ground surface assisting the truck driver. Camera 51 is preferably remotely controlled and used for identification/recognition of truck 36 when entering the premises of distribution center 2. After identifying truck 36 the driver is provided with a message or signals to direct truck 36 to the assigned dock 4. This significantly improves the docking process.

Optionally, camera 51 provides information about the type of vehicle, such as truck 36, to central and/or dock controller 50 enabling controller 50 to adjust the settings of dock components, such as leveler 16 preferably involving dock leveler controller 52 and/or use vehicle specific information for debiting the user of dock 4 for the docking operation that is performed. More specifically, in one of the presently preferred embodiments the vehicle type information is used to control the optional side edges of the leveler 16.

Leveler 16 (Figure 2 A-B) comprises platform 54. In the illustrated embodiment platform 54 is schematically illustrated and comprises main platform 56 that is hingedly provided between side plates 57 of the frame of leveler 16. In addition, in the illustrated embodiment leveler 16 comprises extendable lip 58 having central lip element 59 that can be extended into the cargo space of vehicle 36 in a loading state of leveller 16. Platform 56 has length L, maximum width W and can be positioned at an angle a relative to the horizontal or ground surface of the dock with cylinder 62. In the illustrated embodiment platform 56 is capable of rotation around axis 64. Maximum width W is the sum of the widths of the central lip element W‚, and the individual side- elements Wy. (Figure 20).

In the illustrated embodiment central lip element 59 can be extended with a sliding movement in direction B in the length direction of platform 56, while side-elements 66 can be extended with a sliding movement in direction D that is substantially parallel to direction B. Side- elements 66 can be fully extended (Figure 2A) for use in cooperation with a truck, for example. In addition, side-elements 66 can be (partly) retracted (Figure 2B) for in cooperation with a (delivery) van 36a, for example, leaving open gap 68 having length d,,, (Figure 2C). In a loading state of leveler 16 central lip element 59 protrudes over distance dppon into vehicle 36a. In the illustrated embodiment doors 36b of van 36a are open and are rotated over an angle of about 270° with hinge 36c. In the illustrated embodiment dy. amounts to about 12 cm and d,,, amounts to about 8 cm. It will be understood that dimensions may depend on vehicle and/or leveler type. Optionally, distance sensor 37 is provided. For example, distance sensor 37 can be attached to side-element 66 and/or can be provided on another suitable location. Alternatively, or in combination with distance sensor 37, other sensors can be used to determine gap 68, such as camera 51.

The illustrated embodiment shows that leveler 16 comprises a telescopic lip 58. Schematically it is shown that leveller 16 may also comprise an alternative lip 58 that can be rotated around axis 60 in direction A to bring lip 58 at an angle p relative to platform 56. This relates to a so-called hinged tip or lip leveller. It will be understood that also combinations of different types of leveller can be envisaged. Lip 58 can be moved using drive cylinder 70, for example.

In the illustrated embodiment locks 72 are schematically illustrated to enable and/or disable the use of side-elements 66. Also schematically illustrated are locks 74 that enable locking or unlocking movement of platform 54 around axis 64. Locks 72, 74 may relate to software locks preventing a motor and/or pump to operate, a valve to open or close, and/or a hardware lock, such as a clamp lock.

In a presently preferred embodiment of the invention side-element drive mechanism 104 (Figure 3) comprises locking cylinder 106 that is connected to locking elements 107. Locking elements 107 are configured for engaging guiding strip 108 comprises engagement rib 110. Strip 108 is connected to moveable side-element 66 by arm/strip 109. Retracting cylinder 106 locks movement of side-element 66 as a result of locking elements 107 engaging ribs 110 (Figure 4A). Extension of cylinder 106 in direction E (Figure 4A) releases the engagement between locking elements 107 and ribs 110. Cylinder 106 is attached to frame 112 of leveler 16, more preferably to a stationary part thereof.

In the illustrated embodiment there is provided sub-plate 114 (Figures 3-6) that is located substantially below side-element 66. Sub-plate 114 is provided with catch elements 116 that are configured for engaging side-element 66. Preferably, the position of catch elements 116 is adjustable. In the illustrated embodiment catch elements 116 comprise a number of bolts or screws that are moveable in groove 117 (Figure 6) that is provided in sub-plate 114. It will be understood that other embodiments of catch elements 116 can also be envisaged in accordance to the present invention. Sub-plate 114 is configured for moving jointly with central lip element 59 (Figure 4B) by disengaging locking elements 107 and ribs 110.

Controller 52 (Figure 2A-B) is capable of controlling operation of leveler 16. It will be understood that controller 52 can be applied to different embodiments of leveller 16, including all illustrated embodiments in this application. In the illustrated embodiment(s) selector button or switch 75 is provided to enable a user to enable or disable the use of side-elements 66. Controller 52 receives measurement information 76 from one or more of the sensors 22, 24, 41, 51, 18, 20, 19, 21 and/or other suitable sensors. In addition, controller 52 optionally exchanges information with central controller 50. This may also involve other information and/or authorization of a user or operator to use dock leveler 16.

In a first configuration, controller 52 determines the selected distance dp between side- elements 66 and van 36a or truck 36. In this configuration, preferably, central lip element 59 is moved over a distance equal to selected distance dg, (Figure 5A). Then, side-elements 66 are unlocked and movement of side-elements 66 is coupled to movement of central lip element 59 (Figure 5B). After correctly positioning central lip element 59 into the cargo space, side-elements 66 substantially cover the space between leveler 16 and van 36a only leaving open a small space with distance dp. This is applied when loading/unloading a delivery van, for example.

In a second configuration, controller 52 starts moving central lip element 59 and side- elements 66 (optional in Figure 4A). When distance sensor 37 detects that side-elements 66 approach vehicle 36a too closely controller 52 stops movement of side-elements 66, while central lip element 59 is positioned into the cargo space of van 36a.

In case of loading/unloading a truck, side elements 66 move jointly with central lip element 59 (Figure 4B) to enable positioning inside the cargo space of the truck.

In the illustrated embodiment, warning system 77 determines the transport means that are allowed/authorized for use in combination with the actual angle of inclination o. Warning system 77 is preferably integrated in controller 52. Controller 52 determines control actions 78 that may involve steering cylinders 62, 70 and/or the schematically illustrated drive 80 for side-elements 66. Control actions 78 can be determined automatically and/or manually using operator input.

Optionally, controller 52 generates warning signals 82 to visualization system 84 such as a traffic light/lamp and/or warning signal 86 to display 88 that can be integrated into controller 52 and/or can be provided as a separate display. For example, display 88 can be provided on central controller 50, a smart watch and/or tablet of a user and other suitable displays 88. In one of the presently preferred embodiments display 88 presents a table indicating the different transport means with pictograms of lifting truck 90, ride-on pallet truck 92, electric pallet truck 94, manual pallet truck 96 and manual/hand-held loading 98. For each individual transport means an authorization symbol 100 or unauthorization symbol 102 is shown on display 88. In the illustrated embodiment, manual/hand-held transport and transport with lifting truck is authorized while the other transport means are unauthorized. Loading/unloading goods starts with the arrival of vehicle 36. The vehicle type can be registered using camera 51 or detector 19, for example. Alternatively, the vehicle type can be set by the user using selector button 75, for example. Door 8 is opened, or in case of cold storage preferably partly opened such that leveler 16 can be positioned with lip 58 extending into the cargo space of the vehicle 36, 36a. After seals 16 have been arranged, door 8 can be opened. When movement of platform 54 is approved by a user or operator, locks 74 are unlocked such that cylinders 62, 70 can be operated. Side-elements 66 are may be positioned using detector 19 and drive 80 in accordance with a first or second configuration, for example. After positioning platform 54 correctly, a support signal can be provided to controller 52 by sensor 21. Inclination sensor 20 provides the angle of inclination to controller 52. Controller 52 comprises warning system 77 that determines the transport means that can be used in the loading state of leveler 16. This may involve providing a signal to “traffic light” 84 and/or display 88. Loading/unloading vehicle 36, 36a may start. Undesired and unauthorized use of leveler 16 can be detected by load sensor 18 and/or transport means detector 23. This may activate locks 74, for example, and/or may generate a warning signal to light 84, display 88 and/or central controller 50.

The present invention is by no means limited to the above described preferred embodiments thereof. The rights sought are defined by the following claims within the scope of which many modifications can be envisaged.

CLAUSES I. Dock leveler for loading and/or unloading to/from a vehicle, the leveler comprising: - a platform that can be positioned for adjustment to the height of a cargo space of the vehicle, wherein the platform comprises a main platform and a lip that is configured for partly moving into the cargo space of the vehicle; - a lifting drive for positioning the platform in height and a lip extension drive for positioning the platform between a resting state and a loading state wherein goods can be loaded and/or unloaded to/from the cargo space of the vehicle, wherein the lip of the platform comprises a central lip element and one or more side-elements that are configured for moving over an adjustable distance.

2. Dock leveler according to clause 1, further comprising a side-element drive mechanism that is configured for enabling movement of the one or more side-elements relative to the main platform.

3. Dock leveler according to clause 2, wherein the side-element drive mechanism comprises a locking drive and locking elements that are configured for locking and/or unlocking the one or more side-elements to enable selectively coupling and/or uncoupling movement of the one or more side-elements with the central lip element.

4. Dock leveler according to clause 3, wherein the locking drive comprises a cylinder acting on the locking elements that are configured for engaging the one or more side-elements.

5. Dock leveler according to one of the foregoing clauses, further comprising a catch or cam element that is configured for moving the one or more side-elements jointly with the central lip element.

6. Dock leveler according to clause 5, wherein the catch or cam element is adjustable to adjust the adjustable distance.

7. Dock leveler according to one of the foregoing clauses 2-6, wherein the side-element drive mechanism comprises a side-element drive for moving the one or more side-elements.

8. Dock leveler according to one of the foregoing clauses, wherein the one or more side- elements comprising a distance sensor configured for measuring the distance between the one or more side-elements and the vehicle.

9. Dock leveler according to one of the foregoing clauses, further comprising a dock leveler controller that is configured for detecting and/or selecting a platform condition enabling or disabling the use of the side-elements.

10. Dock leveler according to any of the foregoing clauses, wherein the controller is IO configured for detecting an overload and/or presence of unauthorized transport means on the platform.

11. Dock leveler according to any of the foregoing clauses, further comprising an inclination sensor configured for measuring the angle of inclination of the platform.

12. Dock leveler according to clause 11, further comprising a warning system configured for receiving a measurement from the inclination sensor and determining the type or types of transport means that are allowed to be used in the loading state of the platform.

13. Docking station comprising a dock leveler according to any of the foregoing clauses.

14. Distribution center comprising at least one docking station according to clause 13.

15. Method for loading and/or unloading goods to/from a vehicle, the method comprising the steps of: — providing a dock leveler according to any of the foregoing clauses 1-12; - moving the leveler to a loading state; and - loading and/or unloading goods to/from the cargo space of the vehicle.

Claims

CONCLUSIONS

Dock leveler for loading and / or unloading goods to / from a vehicle, the leveler comprising: - a platform that is positionable for adjustment to the height of a loading space of the vehicle, the platform comprising a base platform and an end that is configured for partial movement in the cargo space of the vehicle; - a lifting drive for positioning the platform in height and an end drive for positioning the platform between a rest condition and a loading condition in which goods can be loaded and / or unloaded to / from the loading space of the vehicle, in which the end of the platform comprises a central end member and one or more side members adapted to move an adjustable distance.

The dock leveler of claim 1, further comprising a side member drive mechanism configured to allow movement of the one or more side members relative to the base platform.

A dock leveler according to claim 2, wherein the side element drive mechanism comprises a blocking drive and blocking elements arranged to block and / or release the one or more side elements to selectively engage and / or release movement of the one or more allow more side elements with the central end element.

Dock leveler according to claim 3, wherein the blocking drive comprises a cylinder acting on the blocking elements arranged to engage the one or more side elements.

Dock leveler according to any of the preceding claims, further comprising a driver element adapted to move the one or more side elements together with the central end element.

Dock leveler according to claim 5, wherein the driver element is adjustable for adjusting the adjustable distance.

Dock leveler according to any of the preceding claims 2-6, wherein the side element drive mechanism comprises a side element drive for moving the one or more side elements.

Dock leveler according to any of the preceding claims, wherein the one or more side elements comprise a distance sensor adapted to measure the distance between the one or more side elements and the vehicle.

Dock leveler according to any one of the preceding claims, further comprising a dock leveler controller adapted to detect and / or select a platform condition that makes it possible to block the use of the side elements.

Dock leveler as claimed in any of the foregoing claims, wherein the controller is adapted to detect an overload and / or the presence of unauthorized transport means on the platform.

Dock leveler according to any of the preceding claims, further comprising an angle sensor adapted to measure the angle of the platform.

Dock leveler according to claim 11, further comprising a warning system arranged to receive a measurement from the angle sensor and determine the type or types of transport means allowed to be used in the loading state of the platform.

Dock comprising a dock leveler according to any one of the preceding claims.

Distribution center comprising at least one dock according to claim 13.

Method for loading and / or unloading goods to / from a vehicle, comprising the steps of: - providing a dock leveler as claimed in any of the claims 1-12; - bringing the leveler into a charging state; and - loading and / or unloading goods to / from the loading space of a vehicle.