Floor conveyor

DE502022006282D1Active Publication Date: 2025-12-24STILL GMBH
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
DE502022006282
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-09-09
Filing Date
2022-08-03
Publication Date
2025-12-24
Estimated Expiration
2042-08-03

AI Technical Summary

Technical Problem

Existing forklift trucks face challenges in achieving uniform storage depth of loads in storage locations due to lateral bending of the lifting frame, leading to potential collisions and inefficiencies in load handling.

Method used

A sensor device measures the horizontal distance to a reference point of the storage location, and a control device adjusts the pushing device to achieve a predetermined storage depth, and a control device adjusts the pushing device to achieve a predetermined storage depth, ensuring a uniform storage depth, and a control device adjusts the pushing device to achieve a predetermined storage depth, regardless of the lifting frame's lateral bending, by controlling the pushing device based on the sensor's measurements.

Benefits of technology

Ensures uniform storage depth of loads, preventing collisions and improving handling efficiency by maintaining a consistent lateral safety distance, reducing manual intervention, and enhancing operator safety and productivity.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader
Need to check novelty before this filing date? Find Prior Art

Description

[0001] The invention relates to a forklift truck with a lifting frame, a load handling device for receiving a load and a push device for the load handling device, wherein the push device together with the load handling device can be raised and lowered on the lifting frame and wherein the push device is designed to move the load handling device relative to the lifting frame in a horizontal transverse direction of the forklift truck, wherein a control device, in particular an electronic control device, is provided which is operatively connected to a sensor device.

[0002] Industrial trucks of this type are frequently designed as narrow-aisle forklifts, specifically in the form of high-bay stackers or high-bay order pickers. The load-handling device, typically a load fork, can be moved laterally relative to the lifting mast by means of a push mechanism.

[0003] These types of industrial trucks are used in narrow-aisle racking systems, such as high-bay racking systems, for storing and retrieving pallets and loads in the racking bays, which form the corresponding storage locations. During operation, the industrial truck moves along a row of racking in a corresponding aisle of the racking system, for example, a narrow aisle. To store a pallet with a load on it, which is mounted on the truck's load handling device, the pallet and its load are pushed horizontally across the vehicle, i.e., perpendicular to the truck's direction of travel in the aisle, and thus laterally into the storage location formed by the racking bay, using the pusher device, such as a telescopic fork or a swiveling pusher. Removing a pallet with a load on it is done similarly, by using the swiveling pusher or...The telescopic fork pulls a pallet laterally out of the shelf compartment of the rack, transversely to the vehicle. The pushing device can have an electric or hydraulic drive, which generates the movement of the load-handling attachment relative to the lifting frame in a horizontal, transverse direction of the forklift truck.

[0004] These types of high-bay stackers or high-bay order pickers are used for storing loads from 0 kg to 1600 kg and are equipped with lifting masts that allow a maximum storage height of the loads in the range of 7m to 18m.

[0005] When storing a load in a storage location, such as a shelf compartment, the load-handling attachment of the forklift truck, along with the load on it, is lifted by the lifting mast together with the extension device. The load-handling attachment is then extended laterally across the vehicle using the extension device. Depending on the lifting height, the load weight, and the center of gravity of the load on the load-handling attachment, this results in varying lateral flexion of the lifting mast.

[0006] With a correspondingly high lateral bending of the lifting frame, it is necessary to manually control the extension process of the load using the extension device when pushing the load laterally, or, in the case of an assisted automatic extension process, to manually interrupt the extension process of the load in such a way that a uniform storage depth of the load in the storage location, for example a shelf compartment, is achieved.If this does not happen, with a sufficiently high lateral bending of the lifting frame, a pallet to be stored could be pushed too deep into the shelf compartment and not rest on both horizontal shelf beams of the rack and / or loads on the rack behind it could be shifted, and when the load is subsequently picked up automatically with a forklift, the load could not be completely lifted out of the shelf compartment up to the back of the fork tines of the forklift's load handling device.

[0007] Since a pallet that is stored too deep in the storage space, for example a shelf compartment, cannot be fully lifted up to the fork back of the forks of the forklift truck's load handling device when the load is picked up, a dangerous situation can even arise in that the necessary lateral safety distance between a load on the forklift truck and the rack is not maintained when the forklift truck is traveling in the narrow aisle, and contact could occur between loads in the rack and the moving load on the forklift truck.

[0008] A generic industrial truck with the features of the preamble of claim 1 is known from US patent 2014 / 072392 A1.

[0009] The present invention is based on the objective of providing a forklift truck of the aforementioned type which is improved with regard to the storage of loads in a storage area.

[0010] This problem is solved according to the invention by the sensor device being configured to measure a horizontal distance in the transverse direction of the vehicle from the pushing device to a reference point of a storage location, and the control device controlling the pushing device as a function of the distance detected by the sensor device in such a way that a predetermined storage depth of the load in the storage location is achieved when a load located on the load-handling device is placed in the storage location. The invention thus makes it possible for the load to always be pushed and placed into a storage location by the pushing device to a predetermined storage depth, regardless of the lateral bending of the lifting frame, so that a uniform storage depth of loads in the storage locations can be easily achieved and ensured.

[0011] According to a preferred embodiment of the invention, the control device controls the pushing device in such a way that the movement of the load-bearing element is stopped when the predetermined insertion depth is reached. This ensures in a simple manner that the load is pushed laterally out to the predetermined insertion depth and placed into the storage space at the predetermined depth, thereby reliably preventing the load from being placed too deep in the storage space.

[0012] According to an advantageous embodiment of the invention, the reference point is formed on a rack having at least one shelf compartment as a storage location, in particular on a horizontal rack beam and / or on a vertical upright of the rack. The control device actuates the pusher device depending on the distance detected by the sensor device such that, when a load located on the load-handling device is placed into the shelf compartment, a predetermined storage depth of the load in the shelf compartment is achieved. The reference point is advantageously formed by a horizontal rack beam and / or a vertical upright of the rack. The sensor device preferably measures the distance of the pusher device to the horizontal rack beam and / or to the vertical upright of the rack.This ensures that, regardless of the lateral flexion of the lifting frame, when a load is placed in a shelf compartment, the load is always extended by the pushing device to a predetermined storage depth in the shelf compartment. This allows for a simple and consistent storage depth of loads in shelf compartments. The predetermined storage depth of the load in the shelf compartment is preferably defined such that the load can be placed on both horizontal shelf beams without protruding into an aisle.

[0013] According to an alternative and equally advantageous embodiment of the invention, the reference point is located at a transfer station designed as a storage location, in particular a stationary transfer station or a roller conveyor. Thus, regardless of the lateral bending of the lifting frame during the storage and placement of a load onto a transfer station, the load can always be pushed and placed by the pushing device to a predetermined storage depth in the transfer station.

[0014] According to an advantageous embodiment of the invention, the load-handling device has a fork carrier on which at least one fork tine of a load fork is arranged.

[0015] The sensor device, in such a load-handling device comprising a fork carriage, is preferably designed to measure the distance of the fork carriage to the reference point of the storage location. Since a load must be lifted onto the load-handling device up to the back of the fork tines arranged on the fork carriage, the fork carriage can be easily selected as a reference point for measuring the distance of the load-handling device to the reference point of the storage location, in order to place the load into the storage location at the predetermined storage depth.

[0016] According to an alternative and also advantageous embodiment of the invention, the load-handling device has a telescopic fork with a telescopic fork table on which at least one telescopic tine is arranged.

[0017] The sensor device is preferably designed in such a load handling device having a telescopic fork table to measure the distance of the telescopic fork table to the reference point of the storage location.

[0018] The sensor device can be designed as an optical sensor system, in particular a laser sensor or camera, or as an acoustic sensor system.

[0019] The invention further relates to a system comprising a forklift truck according to the invention and at least one storage location, in particular a transfer station, preferably a stationary transfer station, or a rack having horizontal rack crossbeams and vertical uprights.

[0020] The invention further relates to a method for storing a load in a storage location using a forklift truck, wherein the forklift truck is equipped with a lifting frame, a load handling device for receiving a load and a push device for the load handling device, wherein the push device together with the load handling device can be raised and lowered on the lifting frame and the load handling device is moved by means of the push device in the horizontal transverse direction of the forklift truck relative to the lifting frame for storing the load in the storage location.The aforementioned problem is solved according to the invention by using a sensor device to measure a horizontal distance in the transverse direction of the vehicle from the pushing device to a reference point of the storage location, and by controlling the pushing device based on the distance detected by the sensor device such that a predetermined storage depth of the load in the storage location is achieved when a load located on the load-handling device is placed in the storage location. With such a method, regardless of the lateral deflection of the lifting frame, the load can always be pushed and placed into the storage location to a predetermined storage depth by the pushing device, thus ensuring a uniform storage depth of loads in the storage locations in a simple manner.

[0021] According to an advantageous embodiment of the invention, the reference point for the storage location is a reference point on a rack having at least one shelf compartment as a storage location, in particular on a horizontal rack beam and / or on a vertical upright of the rack. The pushing device is controlled based on the distance detected by the sensor device such that, when a load located on the load-handling device is placed into the shelf compartment, a predetermined storage depth of the load is achieved. This ensures that, regardless of any lateral flexion of the lifting frame, the load is always pushed by the pushing device to a predetermined storage depth in the shelf compartment, thus easily achieving and ensuring a uniform storage depth of loads in shelf compartments.

[0022] According to an alternative and equally advantageous embodiment of the invention, a reference point at a transfer station designed as a storage location, in particular a stationary transfer station or a roller conveyor, is used as the reference point of the storage location. Thus, regardless of the lateral bending of the lifting frame during storage and placement of a load onto a transfer station, the load can always be pushed and placed by the pushing device to a predetermined storage depth in the transfer station.

[0023] If, according to an advantageous embodiment of the invention, the pushing device comprises a fork carriage on which at least one fork tine of a load fork is arranged, the sensor device measures the distance of the fork carriage to the reference point of the storage location. This allows a predetermined storage depth of the loads in corresponding storage locations, for example, shelf compartments, to be achieved in a simple manner, thus ensuring a uniform storage depth of loads in storage locations, for example, shelf compartments.

[0024] If, according to an alternative and equally advantageous embodiment of the invention, the pushing device comprises a telescopic fork with a telescopic fork table on which at least one telescopic tine is arranged, the distance of the telescopic fork table to the reference point of the storage location is measured by the sensor device. This also allows a predetermined storage depth of the loads in corresponding storage locations, for example, shelf compartments, to be achieved in a simple manner, thus ensuring a uniform storage depth of loads in storage locations, for example, shelf compartments.

[0025] The invention has a number of advantages.

[0026] The predetermined and therefore uniform storage depth of loads in storage locations, for example shelf compartments of a shelf, prevents stored loads from protruding laterally from the shelf into the aisle and reducing the lateral safety distance in the aisle.

[0027] Furthermore, no additional setting down and picking up of loads stored too low is required when removing them from the storage location, for example a shelf compartment, in order to lift the loads right up to the fork back, resulting in a time saving that leads to an increase in the handling capacity of the industrial truck.

[0028] When using an assisted automatic ejection process, in which, upon manual input, the load handling device is automatically ejected into the storage location, for example a shelf compartment, lowered there, and the load is placed in the storage location, and if necessary, the load handling device is subsequently re-inserted, no manual interruption of the load ejection process and / or no manual correction of the load ejection process is required, resulting in time savings and increased comfort for the operator of the industrial truck.

[0029] Furthermore, the invention leads to an increase in safety, since a collision with loads protruding into the lateral safety distance from the storage locations, for example shelf compartments, is avoided, because with the specified, uniform storage depth of the loads in the storage locations, for example shelf compartments of a shelf, no loads protrude into the lateral safety distance.

[0030] Furthermore, the invention prevents loads from bumping into and / or shifting in the shelf behind when storing loads in a shelf compartment.

[0031] The predetermined storage depth of the load in the storage location, for example a shelf compartment, determines the extension depth and thus the extension distance by which the pushing device pushes the load laterally towards the vehicle. This increases safety and reduces damage to the load, the racking, and the material handling equipment.

[0032] Furthermore, the sensor device measures the distance of the pushing device, for example the fork carriage, to a reference point of the storage location, for example a horizontal shelf crossbeam and / or a vertical upright of a shelf, thereby achieving a high accuracy in determining the distance to the storage location, since a real situation is measured.

[0033] Further advantages and details of the invention are explained in more detail with reference to the exemplary embodiment shown in the schematic figures. Here, Figure 1 shows a side view of a forklift truck according to the invention, Figure 2 shows the forklift truck of the Figure 1 in a perspective view with the lifting frame extended upwards, Figure 3 shows a section of the Figure 2Figure 4 shows an enlarged view, a top view of a shelf with a forklift truck according to the invention located in a shelf aisle, Figure 5 shows a side view of a shelf with loads stacked according to a method according to the invention, Figure 6 shows a top view of a shelf with a forklift truck according to the invention located in a shelf aisle with a load in place, Figure 7 shows a side view of a shelf with loads stacked according to the prior art, and Figure 8 shows a top view of a shelf with a forklift truck of the prior art located in a shelf aisle with a load in place.

[0034] In the Figures 1 to 3 Figure 1 shows a forklift truck according to the invention, designed as a narrow aisle forklift in the form of a high-bay order picking forklift.

[0035] The industrial truck 1 has a body with a frame 2, in which a battery compartment is provided for accommodating, for example, a power supply unit 3 of a battery-electric drive system of the industrial truck, designed as a traction battery. The industrial truck 1 has a lifting mechanism formed by a lifting mast 4, on which a driver's platform 5, designed as a car or driver's cabin and forming a workstation F for an operator, is mounted and can be raised and lowered by means of a lifting drive (not shown in detail). The lifting movement that can be generated by the lifting mast 4 is indicated by an arrow H.

[0036] The industrial truck 1 is supported on a roadway FB by means of two non-steered and non-driven load wheels 8, which are arranged at a load-side end of the vehicle frame 2, and a steerable drive wheel 9, which is arranged at a drive-side end of the vehicle frame 2.

[0037] A push device 15 with a load-handling attachment 6, which can pick up a load, is attached to the lifting frame 4, for example, to the liftable and lowerable driver's platform 5. The load-handling attachment 6 can be moved relative to the lifting frame 4 in the horizontal transverse direction Q of the vehicle by means of the push device 15. The push device 15, together with the load-handling attachment 6, can be raised and lowered on the lifting frame 4.

[0038] The push device 15 comprises an electric or hydraulic drive with which the load-handling device 6 can be moved horizontally in the transverse direction Q of the industrial truck 1. In the illustrated embodiment, the push device 15 further comprises a swivel device 17 with which the load-handling device 6 can be pivoted about a vertical axis V. In the illustrated embodiment, an additional lifting device 7 is coupled to the swivel device 17, with which the load-handling device 6 can be raised or lowered relative to the operator's platform 5 and relative to the lifting frame 4.

[0039] In the illustrated embodiment, the pushing device 15 is thus designed as a pivoting fork, with which a horizontal pushing motion in the transverse direction Q of the vehicle and a pivoting motion about the vertical axis V can be generated as movement of the load-handling device 6. Alternatively, the pushing device 15 can be formed by a telescopic fork displaceable in the transverse direction Q of the vehicle, with which only a horizontal pushing motion in the transverse direction Q of the vehicle can be generated as movement of the load-handling device 6.

[0040] The operator's cab 5 contains the control and operating elements required for operating the order picking truck 1, for example in the form of an operating unit designed as a control panel B. The control panel B is equipped with corresponding operating elements for controlling the drive and load handling functions of the order picking truck 1, as well as a steering control element.

[0041] In the drive-side end of the vehicle frame 2, an electric drive system (not shown in detail) is further arranged, comprising an electric drive motor and a steering drive, for example an electric steering motor, for the steerable drive wheel 9, as well as an electrically operated hydraulic pump unit, which is provided for supplying the working hydraulics, which are formed by the lifting drive of the lifting mechanism 4, a lifting drive of the auxiliary lifting device 7, and hydraulic drives for the pivoting push fork provided in the illustrated embodiment as a load-bearing device 6.

[0042] The lifting mast 4 of the industrial truck 1 according to the invention is designed as a multi-stage lifting mast. In the illustrated embodiment and according to the Figure 2The lifting frame 4 is designed as a so-called triplex lifting frame with a support mast 4a arranged on the vehicle frame 2, a first extension mast 4b extendable upwards in the support mast 4a, and a second extension mast 4c extendable upwards in the first extension mast 4b, on which the push device 15 with the load-handling device 6 is arranged. In the Figure 2 The industrial truck 1 is shown with its lifting mast 4 fully extended upwards. A pallet with a load L is located on the load handling device 6. Figure 2 The push device 15 is arranged such that the load L is located centrally to the vehicle's longitudinal axis LA. In this position, the industrial truck 1 can be driven in a racking aisle and the load L can be transported.

[0043] To stack the load L into a - into the Figures 1 to 3The load L is pushed laterally out of the storage location (not shown in detail), for example a shelf compartment of a rack, by means of the push device 15 in the horizontal transverse direction Q of the vehicle. In the Figure 3 The pushing device 15 is shown in a position in which the load L is in a position extended laterally into the storage location, for example a shelf compartment of a shelf.

[0044] The pushing device 15 of the industrial truck according to the invention comprises a fork carriage 25 on which the load handling device 6 is arranged, which preferably comprises two fork tines 6a, 6b of a load fork.

[0045] Depending on the lifting height, the load weight, and the center of gravity of the load L located on the load handling device 6, a different lateral mast bending of the lifting mast 4 occurs in the industrial truck 1, which is described in the Figures 2 and 3 as illustrated by the arrows B.

[0046] In order to achieve a uniform and consistent storage depth of the loads L in storage locations, for example shelf compartments of a rack, despite this possible lateral bending of the lifting frame 4, the industrial truck 1 is provided according to the invention with a control device 30, for example an electronic control device 30, which is operatively connected to a sensor device 31, with which - as in the Figure 4As illustrated, a distance between the pushing device 15 and a reference point BP of the storage location EP can be measured. The sensor device 31 measures the horizontal distance Q in the transverse direction of the vehicle from the pushing device 15 to the reference point BP of the storage location EP. The control device 30 controls the pushing device 15, for example, the drive of the pushing device 15, depending on the distance detected by the sensor device 31, such that when a load L located on the load handling device 6 is placed in the storage location EP, a predetermined storage depth of the load L in the storage location EP is achieved, and thus the load L is pushed out into the storage location EP at the predetermined storage depth.

[0047] In the exemplary embodiment of the storage location EP as shelf compartment RF of a rack R, the reference point BP is formed on the rack R, for example on a horizontal rack beam RT or a vertical upright of the rack R. Preferably, the reference point BP is formed on the front rack beam RT of the rack R facing the forklift 1. The sensor device 31 preferably measures the horizontal distance Q in the transverse direction of the vehicle from the push device 15 to the horizontal rack beam RT.The control device 30 controls the push device 15, for example the drive of the push device 15, depending on the distance detected by the sensor device 31, such that when a load L located on the load handling device 6 is placed in a shelf compartment RF of the shelf R, a predetermined storage depth of the load L in the shelf compartment RF is achieved and thus the load L is pushed out into the shelf compartment RF with the predetermined storage depth.

[0048] The control device 30 controls the thrust device 15, for example the drive of the thrust device 15, preferably in such a way as to depend on the distance detected by means of the sensor device 31, that the movement of the load handling device 6 in the transverse direction Q of the vehicle is stopped when the predetermined storage depth is reached.

[0049] Preferably, the sensor device 31 is configured such that it measures the distance of the fork carriage 25 to the reference point BP, which is preferably located on the horizontal shelf crossbeam RT of the rack R. For this purpose, the sensor device 31 can be arranged directly on the fork carriage 25 and have a detection range E that is oriented laterally in the horizontal transverse direction Q of the vehicle and thus in the direction of movement of the push device 15. The sensor device 31 is preferably designed as a laser sensor, for example as a laser measuring instrument.

[0050] In the Figure 4The figure shows a top view of a rack R with a forklift truck 1 according to the invention located in a rack aisle RG. When a load L is stored in a storage location EP designed as a shelf compartment RF of the rack R, the sensor device 31 measures the horizontal distance of the fork carriage 25 to the front horizontal shelf crossbeam RT of the shelf compartment RF, which faces the forklift truck 1 and forms the reference point BP of the storage location EP designed as a shelf compartment RF. The drive of the extension device 15, which generates the extension movement of the load handling device 6 in the horizontal transverse direction Q of the vehicle, is controlled based on the distance detected by the sensor device 31 in such a way that a predetermined storage depth of the load L in the shelf compartment RF of the rack R is achieved when a load L is stored on the load handling device 6.The specified storage depth is such a specified horizontal distance of the fork carriage 25 from the front horizontal shelf beam RT that the load L, after being lowered, rests on the front horizontal shelf beam RT and the rear horizontal shelf beam RTH of the shelf R and has a distance to the load L in the shelf compartment RFH located behind the shelf compartment RF.

[0051] According to the invention, the horizontal distance from the fork carriage 25 of the pushing device 15 to the reference point BP of the storage location EP, for example the front horizontal shelf beam RT of the rack R, is measured by the sensor device 31, and this information is used to regulate the extension depth of the load L. The measured value makes it possible to store the load L evenly in the rack R, regardless of how far the lifting frame 4 is bent laterally.

[0052] The control device 30, which receives and processes the distance measurement from the sensor device 31, compares the distance measurement with the specified, for example, a preset, storage depth and calculates the required extension path of the load-handling device 6 in the transverse direction Q of the vehicle. Subsequently, the extension path of the load-handling device 6 is limited to this calculated extension path, or it is ensured that the placement of the load L in the shelf compartment RF does not occur before the determined extension path is reached.

[0053] In the Figure 5 is a shelf R, for example a section along lines AA of the Figure 4The system is shown with several storage locations EP designed as shelf compartments RF in several stacked shelf levels E1 to E4, into each of which a load L1 to L4 was stored according to the invention. The loads L1 to L4 are each stored to the predetermined storage depth ET in the corresponding shelf compartments RF, so that the loads L1 to L4 have a uniform and consistent storage depth ET.

[0054] In the Figure 6 Figure 1 shows a top view of a rack R with a forklift truck 1 according to the invention located in a rack aisle RG, wherein the loads L are each stored to the predetermined storage depth in the corresponding storage locations EP designed as rack compartments RF, so that the loads L have a uniform and consistent storage depth ET. If the forklift truck 1 is used – as shown in the figure 1 – the loads L are stored at a uniform storage depth ET. Figure 6As shown, when a load L stored in this way is removed from the rack compartment RF, the load handling device 6 can be moved in the transverse direction Q of the vehicle during removal of the load L, due to the predetermined storage depth of the load L in the rack compartment RF, such that the load to be removed rests against the back of the fork tines 6a, 6b before lifting. In the retracted position of the load handling device 6, which is shown in the Figure 6 As shown, a safety distance SA can thus be achieved between the load L located on the load handling device 6 and the loads L located in the rack R, so that collisions of the load L located on the load handling device 6 with the loads L located in the shelf compartments RF of the rack R are avoided when the industrial truck 1 travels along the rack aisle RG.

[0055] The invention is not limited to the illustrated embodiment of a forklift truck 1, which has a liftable driver's platform 5. Alternatively, the forklift truck 1 can have a driver's workstation on the vehicle frame 2, wherein the push device 15, equipped with the load-handling device 6, is arranged directly on the lifting frame 4 in a way that allows it to be raised and lowered.

[0056] Furthermore, the invention is not limited to the illustrated embodiment of the industrial truck 1 with a push device 15 designed as a pivoting push fork. Alternatively, the push device 15 can be formed by a telescopic fork arranged to be displaceable in the transverse direction Q of the vehicle, with which only a horizontal push movement in the transverse direction Q of the vehicle can be generated as the movement of the load-handling device 6.

[0057] Furthermore, the invention is not limited to the design of the storage location EP as a shelf compartment RF of a rack R. Alternatively, the storage location EP can be designed as a transfer station, for example as a roller conveyor, in which the reference point for the distance measurement of the sensor device 31 is located on a side of the transfer station facing the industrial truck.

[0058] In the Figure 7A rack R with several shelf compartments RF in several stacked levels E1 to E4 is shown, into each of which a load L1 to L4 has been stored according to the prior art, for example by manual control of the push device 15 which generates the extension movement of the load handling device 6 in the horizontal transverse direction Q of the vehicle. The loads L1 to L4 have different storage depths and are not uniform in depth. It can be seen that the load L3 in the left rack R and the loads L2 and L4 in the right rack R have insufficient storage depths and protrude into the corresponding rack aisle RG.

[0059] If, in the prior art, a load L that has been stored too deep in the shelf compartment RF is removed, a situation can arise which is described in the Figure 8The figure shows a top view of a rack R with a forklift truck 1 located in a rack aisle RG, the loads L having different storage depths and a non-uniform storage depth in the corresponding rack compartments RF. Figure 8 Figure 1 depicts a situation in which load L1 is stored too deep, loads L2 have insufficient storage depth, and loads L3 have the correct storage depth. If load L1, which is stored too deep in shelf RF, is removed from shelf RF using forklift 1, the removed load L does not rest against the back of the fork tines 6a, 6b, as shown in the figure 1. Figure 8 This is made clear. In the retracted position of the load-bearing device 6, which is shown in the Figure 8As shown, the load L picked up by the load handling device L may still be partially located in the shelf compartment RF or may be pulled out of the shelf compartment RF to such an extent that collisions occur between the load L on the load handling device 6 and the loads L2 located in the shelf compartments RF of the rack R when the industrial truck 1 travels along the rack aisle RG, especially if a load L2 stored in a shelf compartment RF protrudes from the shelf compartment RF into the rack aisle RG due to insufficient storage depth.

Claims

1. Industrial truck (1) having a lifting frame (4), a load-carrying means (6) for carrying a load (L) and an advancing device (15) for the load-carrying means (6), wherein the advancing device (15) can be lifted and lowered on the lifting frame (4) together with the load-carrying means (6) and wherein the advancing device (15) is designed to move the load-carrying means (6) relative to the lifting frame (4) in the horizontal truck transverse direction (Q) of the industrial truck (1), wherein a control device (30), in particular an electronic control device (30), is provided, which control device is in operative connection with a sensor apparatus (31), characterized in that the sensor apparatus (31) is designed to measure a horizontal distance in the truck transverse direction (Q) between the advancing device (15) and a reference point (BP) of a storage location (EP), and the control device (30) actuates the advancing device (15) depending on the distance detected by means of the sensor apparatus (31) in such a way that, when a load (L) located on the load-carrying means (6) is stored in the storage location (EP), a predefined storage depth (ET) of the load (L) in the storage location (EP) is achieved.

2. Industrial truck according to Claim 1, characterized in that the control device (30) actuates the advancing device (15) in such a way that the movement of the load-carrying means (6) is stopped when the predefined storage depth (ET) is reached.

3. Industrial truck according to Claim 1 or 2, characterized in that the reference point (BP) is formed on a shelf (R) having at least one shelf compartment (RF) as the storage location (EP), in particular on a horizontal shelf crossbeam (RT) of the shelf (R) and / or on a vertical rack of the shelf (R), and the control device (30) actuates the advancing device (15) depending on the distance detected by means of the sensor apparatus (31) in such a way that, when a load (L) located on the load-carrying means (6) is stored in the shelf compartment (RF) of the shelf (R), a predefined storage depth (ET) of the load (L) in the shelf compartment (RF) is achieved.

4. Industrial truck according to Claim 1 or 2, characterized in that the reference point is formed at a transfer station designed as the storage location, in particular a roller track.

5. Industrial truck according to any one of Claims 1 to 4, characterized in that the load-carrying means (6) comprises a fork carriage (25) on which at least one fork tine (6a; 6b) is arranged.

6. Industrial truck according to Claim 5, characterized in that the sensor apparatus (31) is designed to measure the distance between the fork carriage (25) and the reference point (BP) of the storage location (EP).

7. Industrial truck according to any one of Claims 1 to 4, characterized in that the load-carrying means (6) comprises a telescopic fork having a telescopic fork table on which at least one telescopic tine is arranged.

8. Industrial truck according to Claim 7, characterized in that the sensor apparatus (31) is designed to measure the distance between the telescopic fork table and the reference point (BP) of the storage location (EP).

9. Industrial truck according to any one of Claims 1 to 8, characterized in that the sensor apparatus (31) is designed as an optical sensor system, in particular a laser sensor, or as an acoustic sensor system.

10. System comprising an industrial truck (1) according to any one of the preceding claims and at least one storage location (EP), in particular a transfer station or a shelf (R) having horizontal shelf crossbeams (RT) and vertical racks.

11. Method for storing a load (L) in a storage location using an industrial truck (1), wherein the industrial truck (1) is provided with a lifting frame (4), a load-carrying means (6) for carrying a load (L) and an advancing device (15) for the load-carrying means (6), wherein the advancing device (15) can be lifted and lowered on the lifting frame (4) together with the load-carrying means (6) and, to store the load (L) in the storage location, the load-carrying means (6) is moved by means of the advancing device (15) relative to the lifting frame (4) in the horizontal truck transverse direction (Q) of the industrial truck (1), characterized in that a horizontal distance in the truck transverse direction (Q) between the advancing device (15) and a reference point (BP) of the storage location (EP) is measured using a sensor apparatus (31) and the advancing device (15) is actuated depending on the distance detected by means of the sensor apparatus (31) in such a way that, when a load (L) located on the load-carrying means (6) is stored in the storage location (EP), a predefined storage depth (ET) of the load (L) in the storage location (EP) is achieved.

12. Method according to Claim 11, characterized in that the reference point (BP) of the storage location (EP) used is a reference point on a shelf (R) having at least one shelf compartment (RF) as the storage location (EP), in particular on a horizontal shelf crossbeam (RT) of the shelf (R) and / or on a vertical rack of the shelf (R), and the advancing device (15) is actuated depending on the distance detected by means of the sensor apparatus (31) in such a way that, when a load (L) located on the load-carrying means (6) is stored in the shelf compartment (RF) of the shelf (R), a predefined storage depth (ET) of the load (L) in the shelf compartment (RF) is achieved.

13. Method according to Claim 11, in that the reference point of the storage location used is a reference point at a transfer station designed as a storage location, in particular a roller track.

14. Method according to any one of Claims 11 to 13, characterized in that the advancing device (15) comprises a fork carriage (25) on which at least one fork tine (6a; 6b) is arranged, wherein the distance between the fork carriage (25) and the reference point (BP) of the storage location (EP) is measured by the sensor apparatus (31).

15. Method according to any one of Claims 11 to 13, characterized in that the advancing device (15) comprises a telescopic fork having a telescopic fork table on which at least one telescopic tine is arranged, wherein the distance between the telescopic fork table and the reference point (BP) of the storage location (EP) is measured by the sensor apparatus (31).