Fall protection device, access and safety system comprising a fall protection device, storage system, method for securing an operator, method for entering a rack structure and use of the fall protection device and the access and safety system

Abstract

A fall protection device (1) for securing an operator (2) in a racking system which has parallel running rails (3) comprises at least two support devices (4) for storage in or on the running rails (3), wherein the support devices (4) are connected to each other via a frame part (5), and wherein the fall protection device (1) is configured to allow the connection of a safety device (6) for securing the operator (2).

Description

Technical area

[0001] The invention relates to a height safety device, an access and safety system comprising a height safety device, a storage system, a method for securing an operator, a method for entering a shelving structure and a use of the height safety device and the access and safety system according to the independent claims. State of the art

[0002] Some devices and methods for height safety are known from the state of the art.

[0003] EP 2 020 388 B1 discloses a mobile platform for troubleshooting an automated storage magazine.

[0004] DE 100 57 735 A1 discloses a system for picking items located in rack storage with a rail-mounted picker vehicle and a picker carrying device with all-round fall protection for pickers.

[0005] A passenger transport bench for storage and retrieval vehicles is known from DE 38 04 622 A1. Object of the invention

[0006] The object of the present invention is to overcome the disadvantages of the prior art. Solution to the task

[0007] The subject matter of the independent claims leads to the solution of the problem. Advantageous embodiments are described in the subclaims.

[0008] A fall arrest device according to the present invention is used to secure an operator in a shelving system with parallel rails. The fall arrest device comprises at least two support devices for storage in or on the rails. The support devices are connected to each other via a frame part. The fall arrest device is designed to allow the connection of a safety device for securing the operator.

[0009] The frame section can be adjustable in size, as explained in more detail below. The dimensions of a fall arrester without an adjustable frame section can advantageously be adapted to the track width of a pair of rails on which it is to be mounted or inserted.

[0010] The rails on which the fall arrest device is placed are primarily used by shuttles or similar vehicles during normal operation, and are therefore present in numerous known shelving systems. Thus, securing an operator at height using a fall arrest device according to the invention can be achieved in known shelving systems without any structural modifications.

[0011] Such a fall arrest device can advantageously allow for very simple securing of an operator within a shelving structure. Furthermore, the universal applicability of such a fall arrest device can be advantageous, particularly in a shelving structure that has rails for shuttles or the like, on which the fall arrest device can be placed. Another advantage can be the ability to move the fall arrest device along the rails, which allows for a large deployment radius without re-securing. The transportability of the compact fall arrest device can also be an advantage.

[0012] The height safety device can be designed as a safety carriage, which can in particular comprise running wheels, which are explained in more detail below.

[0013] Running wheels can allow the fall arrest device to be moved along the rails, i.e. in the longitudinal direction of the rails, in a particularly simple manner.

[0014] The racking structure can be a high-bay rack with several stacked rack levels. For example, it can be a channel storage system, particularly a pallet channel storage system. The racking structure preferably has rails on the rack levels, on which the fall arrest device can be placed by inserting or placing it into or onto the rails.

[0015] The racking structure can comprise a plurality of parallel rails arranged in pairs on one or more rack levels. The racking structure can additionally comprise a further plurality of parallel rails arranged in pairs, which run orthogonally to the aforementioned rails. These orthogonally running rails can intersect. The rails can, for example, allow shuttles to move within the rack levels of the racking structure. Four-way shuttles, particularly in conjunction with orthogonally arranged rails, can move horizontally as desired within the rack levels, for example to convey and store and retrieve load units. Pallet channel storage systems often comprise intersecting rails on which shuttles move to access storage channels and to store or retrieve pallets there.Rails, known as channel rails, often run within the storage channels. The shuttles can move on the channel rails as well as on the rails outside the channels. The channel rails can differ in design and / or track width from the rails outside the channels. Often, all the channel rails in a shelving system are arranged parallel to one another, with the channel rails and the rails outside the storage channels running parallel to the channel rails having the same track width. The rails outside the storage channels, which run orthogonally to the channel rails, preferably have a different track width. As described in more detail below, an adjustable height lifeline can be used on all rails, regardless of their track width.

[0016] The rails can be U-, L-, S-, or C-shaped in cross-section, particularly in the area of ​​a support surface for shuttles and the like. S- and C-shaped rails in particular can, in addition to the support surface for the wheels of a shuttle (or safety carriage according to the present invention), also offer a parking area for pallets or the like. Alternatively, the rails can also be constructed without side barriers in cross-section, which are present in most U-, L-, S-, or C-shaped rails. Rails without side barriers can, in the simplest case, resemble a horizontal line in cross-section.

[0017] The cross-section of the rails does not have to be strictly U-, L-, S-, C-, or line-shaped. On the one hand, one rail in each pair of rails is usually designed as a mirrored L, S, or C. Furthermore, for example, to provide the necessary strength and stability, sections of the rails can be made significantly widened, so that the aforementioned shapes are only vaguely recognizable, for example, through the contours of the surfaces of the respective rail. For example, a rail with a line-shaped cross-section can actually be described as having a rectangular cross-section, depending on its height. Alternative cross-sectional shapes are also conceivable.

[0018] A shelving system can have different rails, especially different pairs of rails. For example, channel rails, which will be described in more detail below, can have a different cross-sectional shape than the other rails. For example, the channel rails can be U-, L-, S-, or C-shaped, while the rails outside the storage channels can resemble a horizontal line in cross-section.

[0019] Usually, the running rails outside the storage channels do not include any continuous side barriers.

[0020] It should be mentioned here that channel rails are also travel rails, so shuttles can also move along channel rails and the height safety device according to the invention can be used both in channel rails and in or on other travel rails.

[0021] Furthermore, in alternative racking systems, all previously described track widths and cross-sectional shapes of the rails can be combined with each other, and all conceivable combinations can be considered as channel rails as well as as rails outside the storage channels.

[0022] The support devices can be plain bearings or comprise such a plain bearing. However, it is also conceivable for the support devices to comprise rollers, wheels, or the like, with wheels, particularly running wheels, being preferred. The support devices can also consist of rollers, wheels, or the like. The support devices are preferably arranged at the end or substantially at the end of the frame part.

[0023] In the simplest case, the frame part can be a beam, a rod or the like, on which the support devices are arranged, in particular, essentially at the end.

[0024] If the frame part is variable in size, the simplest option would be a telescopic rod.

[0025] In general, the frame part is a component or assembly for connecting the support devices, and preferably also for connecting the operator, for example via a snap hook or the like.

[0026] If the frame part is adjustable in size, “adjustable in size” preferably means that the distance between the support devices can be changed with the help of this adjustable frame part.

[0027] In order to limit the movement of a snap hook or the like, the frame part may include stops.

[0028] The safety device can, for example, comprise at least one safety rope, preferably with at least one snap hook.

[0029] The safety device can be attached anywhere on the fall arrester. This can be equipped with eyelets or other attachment points for the safety device. As already mentioned, the preferred option is for the safety device to be attached to the frame part.

[0030] If the frame component is adjustable in size and designed as a telescopic pole, the safety device can be attached directly to the telescopic pole using a snap hook. The same applies to a fixed frame component designed as a pole, beam, or similar.

[0031] The support devices can each comprise at least one impeller. In a simple embodiment, each support device can comprise a single impeller or consist of a single impeller.

[0032] Preferably, each support device comprises at least two running wheels, for example, exactly two running wheels. Within the scope of the present invention, support devices can thus, on the one hand, be simple bearings, for example, plain bearings, which are arranged, for example, essentially at the ends, on the frame part. It is also conceivable to provide two individual wheels as support devices, with the frame part serving as the axle of these wheels. On the other hand, the support devices can also comprise more complex structures, for example, several running and / or guide wheels, with the entire assembly being referred to as the "support device."

[0033] The height safety device may comprise at least one guide device, for example at least one guide wheel.

[0034] The guide device can be configured to contact a side barrier of the running rail. Contact preferably means, depending on the design of the guide device, either a continuous sliding, rolling, or similar movement of the guide device along the side barrier as soon as the retractable fall arrester moves along the running rails. Alternatively, contact can always occur when the retractable fall arrester has been undesirably displaced orthogonally to a longitudinal direction of the running rail. The guide device can therefore also limit the mobility or displacement of the retractable fall arrester orthogonally to the longitudinal direction of the running rails.

[0035] If a guide wheel is used, its wheel axis can be arranged orthogonally to the wheel axis of at least one of the running wheels. Instead of the guide wheel, sliding blocks or other components can also be used as a guiding device.

[0036] Preferably, each support device comprises at least one, for example exactly two, guide devices. The guide devices can come into contact with sections of the runway running vertically to a support surface of the runway rails and, for example, ensure centering of the retractable fall arrester on the runway rails. Alternatively or additionally, the guide devices can prevent any other undesired contact between the support devices and the aforementioned vertically running sections of the runway rails. If, for example, a larger surface section of the support device were to slide along a vertically running section of the runway rail, for example a side barrier, during lateral displacement, this could lead to undesired friction and, in the worst case, to tilting, which can be prevented by using the guide devices.

[0037] In particular, guide wheels can advantageously ensure that the height safety device is held and guided securely in the rails against slipping and falling, and prevent any friction with vertical sections of the rails.

[0038] The size-adjustable frame part can include a telescopic rod or consist of such a rod.

[0039] The resizable frame component, especially when designed as a telescopic rod, can advantageously ensure that the fall arrest device is particularly easy to install and adapts to different distances between the rails, i.e., to different track widths. Furthermore, when the telescopic rod is retracted, the fall arrest device can be very compact and easy to transport.

[0040] As described in more detail below, the size-adjustable frame part essentially provides at least three advantages: Firstly, it can allow the retractable fall arrester to be inserted into a substantially C-shaped rail.

[0041] Secondly, it can facilitate threading the fall arrester from below into a pair of rails located above the operator. The advantages of the resizable frame section become particularly apparent during threading when cross braces are present between the rails, which, together with the pair of rails, form openings through which the threading must occur.

[0042] Thirdly, the adjustable frame section allows the fall arrester to be adapted to rail pairs with different track widths. The fall arrester can thus be used for all rail pairs of a racking system, regardless of the track width, if the racking system in question includes rail pairs with different track widths. Furthermore, the fall arrester can be used in different racking systems that differ in the track width of their rail pairs.

[0043] A telescopic rod is preferably designed in at least two parts. The telescopic rod can comprise at least two rod parts that are arranged at least partially within one another and can be moved relative to one another. Alternatively, a telescopic rod can also comprise three or more rod parts.

[0044] The adjustable frame part can include a locking device. The locking device can, for example, fix the length of a telescopic rod-shaped adjustable frame part, and thus the width of the fall arrest device, by locking. Preferably, the locking is achieved by securing the rod parts relative to one another, for example, by snapping them into place or the like. To adapt the safety carriage to different track widths, the locking device can allow for multiple locking positions.

[0045] The fall arrester can include a locking mechanism for reversibly and positively securing the fall arrester to the guide rail. This locking mechanism can be used in fall arresters with or without a size-adjustable frame section.

[0046] The locking device is preferably designed to reversibly assume two positions: a locking position and a release position. In the locking position, the locking device positively secures the fall arrester against unwanted movement; in the release position, an operator can remove the fall arrester from the guide rails.

[0047] The height safety device can comprise two fixing devices in order to be reversibly and positively fixed to both rails of a pair of rails.

[0048] The locking device can be designed as a claw and grip the support surface of the guide rail. Such a locking device secures the fall arrester against unwanted movement, particularly against falling out of or lifting off the rail. This locking is performed orthogonally to the longitudinal direction of the rail, both horizontally and vertically. Outside of storage channels and using the usual directional designations, such a locking device secures the fall arrester against unwanted displacement and removal along the Z and Y axes.

[0049] The locking device can also be designed so that it does not engage under the support surfaces, but merely serves as a stop against unwanted horizontal movement of the fall arrester orthogonal to the longitudinal direction of the rail. In this case, the locking device can be rigidly mounted on the fall arrester.

[0050] Furthermore, the locking device can be designed in such a way that it can switch reversibly between a locking and a release position, whereby it engages under the support surfaces of the rails in the locking position, but is designed in such a way that it does not offer any positive locking against undesired horizontal movements.

[0051] The present invention also encompasses an access and safety system comprising a recovery vehicle with a receptacle for a fall arrester as described above, as well as such a fall arrester. The receptacle can be designed in the form of a preferably open "trunk" of the recovery vehicle, in which the fall arrester is stored.

[0052] The recovery vehicle is preferably configured to allow an operator to move along the rails of the shelving structure. The recovery vehicle preferably comprises wheels, which are preferably driven by a hand crank or the like, so that the operator can move around the shelving structure even in the event of a power failure or emergency shutdown. It is also possible for the recovery vehicle to be powered by an energy storage device, such as a battery or the like, for example, to drive the wheels.

[0053] In order to be able to move horizontally as desired on rails that run orthogonally to one another, the recovery vehicle can comprise two wheel sets that can be placed manually on the corresponding rails, for example by raising and lowering them with the aid of a suitable device. The aforementioned raising and lowering device can be manually operated or automatic, which is fed, for example, by the energy storage device, if present. The wheels of these wheel sets can allow travel in directions that run orthogonally to one another. Using these wheel sets, the recovery vehicle can be used, for example, on pairs of rails with different track widths. Instead of two wheel sets, the recovery vehicle can also comprise rotating wheels, in particular manually or at least purely mechanically rotating wheels, which allow travel in directions that run orthogonally to one another.

[0054] The recovery vehicle may include a seat for the operator controlling the recovery vehicle and a support area for the operator's feet.

[0055] The recovery vehicle can include an energy storage device with which an operator can charge a shuttle or the like that has become stuck within the rack levels.

[0056] The present invention further encompasses a storage system comprising a rack structure as described above with parallel rails and a height safety device as described above. The storage system can further comprise a recovery trolley as described above with a receptacle for the height safety device.

[0057] The storage system may include a first plurality of travel rails having a first track width and a second plurality of travel rails having a second track width.

[0058] For example, the racking system may include rails with a first track width and channel rails with a second track width. It may be possible for all channel rails to have the same track width, while some of the rails located outside the storage channels may have the same track width as the channel rails. This may particularly apply to those rails outside the storage channels that run parallel to the storage channels.

[0059] The channel rails can include storage areas for pallets or similar, but also support surfaces for the shuttle wheels. The travel rails can only include support surfaces, because there is usually no need to store loads there, i.e., outside the storage channels.

[0060] In principle, it is possible to consider that the canal rails and at least some of the other running rails differ in their construction and / or track gauge. A different track gauge may be particularly appropriate when using rectangular, but not square, shuttles with two wheelsets. Two wheelsets with different track gauges are typically used for changing direction at intersections and for entering storage channels if the shuttle in question approaches the storage channel from the side rather than head-on, i.e., travels orthogonally rather than parallel to the canal rails.

[0061] Instead of two sets of wheels, shuttles could also be designed with rotating wheels to allow for a change of direction. In particular, wheels with an axle that can rotate horizontally by 90° could be considered. Alternatively, omnidirectional wheels, also called omniwheels for short, could be considered to allow a change of direction. Mecanum wheels could also be considered to allow a change of direction.

[0062] The present invention further comprises a method for securing an operator with a height safety device as described above in a shelving structure with several shelf levels, which comprises the following steps: - Inserting or placing the support device into a rail of the shelving structure or onto a rail of the shelving structure - Securing the operator to the retractable fall arrester.

[0063] If the fall arrest device includes a size-adjustable frame part, the size of the size-adjustable frame part can be adjusted before inserting or attaching the support device.

[0064] Preferably, the size of the frame part is not only adjusted, but also locked. The preferred locking can be achieved by means of a locking device. The size of the frame part is preferably its length, for example, the length of a telescopic rod. The size of the frame part is preferably adjusted according to the distance between two parallel rails of a pair of rails, so that the support device rests on or in the rails.

[0065] The adjustment and insertion or placement can be carried out in any order, taking the shape of the guide rails into account. It is also possible to first insert or place one of the support devices, then make the adjustment, and then insert or place the other support device. If a size-adjustable frame part is used, it is possible to adjust the size before the support devices are inserted or placed in or on the guide rail. This is particularly useful if the distance between the rack levels is so large that the operator can no longer adjust the size after inserting or placing the support devices in or on the guide rails in the rack level above them, i.e. overhead. In addition or alternatively, aids for inserting or placing the safety carriage, i.e.the support devices in or on the rails.

[0066] The operator can be secured to the fall arrester by attaching a safety rope or other safety device to the fall arrester. This can be done via an eyelet or similar device on the fall arrester, or by means of a snap hook, or by other means. It is preferable that the operator's personal protective equipment (PPE) is attached to the fall arrester in such a way that the operator cannot fall.

[0067] This is particularly important when the operator gets out of the recovery vehicle and does not, for example, move on any existing gratings or the like, which are arranged in some rack levels and in some places between the pairs of rails.

[0068] Securing can be carried out overhead by inserting or placing the fall arrest device into or onto a rail located on a shelf level which in turn is located directly above the shelf level on which the operator is located.

[0069] It can be considered that the method for securing an operator with a height safety device with a size-adjustable frame part in a racking structure with rails that are essentially U-shaped, L-shaped or line-shaped in cross-section, and comprises the following steps: - Lifting the fall arrester over a pair of rails on which the fall arrester is to rest, - Setting a size of the adjustable frame part according to the distance between the running rails of the running rail pair - Placing the support devices on the rails.

[0070] A guide rail with a cross-section that is essentially U-, L-, or line-shaped, preferably has no undercut when viewed from above. It is therefore freely accessible from above. Limitation for, for example, a shuttle or recovery vehicle traveling on this guide rail is preferably provided only downwards by the support surface and, optionally, laterally by corresponding side limits provided by the legs of the U- or L-shape.

[0071] As already described, it is preferable not only to adjust but also to lock.

[0072] The adjustment is preferably carried out in such a way that the support devices lie on the rails.

[0073] Lifting and adjustment can be performed in the order listed. This order can also be reversed if the fall arrester can be pushed through from below between the pair of rails on which its support devices are to rest. This usually requires rotating the fall arrester accordingly.

[0074] Alternatively, it may be considered that the method for securing an operator with a height safety device with a size-adjustable frame part in a shelving structure with rails that are essentially C-shaped in cross-section, the method comprising the following steps: - Inserting a first support device into a C-shaped cross-section rail - Setting a size of the size-adjustable frame part according to the distance between the running rails of the running rail pair, and, during this setting - Inserting a second support device into another rail with a C-shaped cross-section.

[0075] A guide rail with a substantially C-shaped cross-section, viewed from above, preferably has an undercut. Therefore, it is not freely accessible from above.

[0076] As already described, it is preferable not only to adjust but also to lock.

[0077] The second support device is preferably inserted at the end of the adjustment, ie shortly before the desired size of the size-adjustable frame part, in particular the desired length of the telescopic rod, is reached.

[0078] If the height safety device includes a securing device, each variant of the method described above can include a positive-locking securing of the height safety device to the running rail using this securing device.

[0079] The present invention further comprises a method for safely entering a shelving structure using a system as described above, which comprises the following steps: - Driving into the shelving unit with the help of the recovery vehicle - Secure the operator with the retractable fall arrester as described above.

[0080] Before securing, the operator can stand up and, if necessary, exit the rescue vehicle. Securing can be achieved either by the operator standing on the rescue vehicle and inserting or placing the fall arrester in or on the rails in the racking level directly above them, or by the operator exiting the vehicle beforehand and, for example, by inserting or placing the fall arrester while standing on a section of the racking structure.

[0081] The recovery vehicle's seat can be designed as a folding seat, providing a standing surface for the operator to stand on when the safety vehicle is being lowered or lowered. Alternatively, another section of the recovery vehicle can serve as a standing surface.

[0082] The present invention further comprises a use of a height safety device as described above for securing an operator in a shelving structure.

[0083] The present invention further comprises a use of a system described above for entering a shelving structure and for subsequently securing an operator in the shelving structure. Character description

[0084] Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings described below.

[0085] The Fig. 1 and Fig. 2 shows a rescue vehicle 11 and a height safety device designed as a safety vehicle 1. Furthermore, a seat 16, a hand crank 17 and a support 12 of the rescue vehicle 11 are visible. Fig. 2, a first support device 4.1 and a second support device 4.2 can be seen, which together with the variable-size part 5 form the safety carriage 1. Fig. 2 shows an exploded view of the arrangement according to Fig. 1, in which the safety carriage 1 is not accommodated in the holder 12 of the recovery carriage 11.

[0086] The Fig. 3 and Fig. 4 each show a section of a racking structure 20, wherein the recovery vehicle 11 located on rails 3.1 can be seen, on which an operator 2 is sitting. Above the rails 3.1, on which the recovery vehicle 11 is located in the Fig. 3 and Fig. 4, further rails 3.2 of the shelf level above are visible. Fig. 4, the safety carriage 1 is placed on these overlying rails 3.2. The horizontal rails 3.1, 3.2 running parallel to each other in the same rack level each form a pair of rails 21, which in the figures is only shown for the lower rails 3.1 in Fig. 3 is indicated by the reference number 21. With regard to Fig. 4 also shows the X, Y and Z coordinates.

[0087] For the sake of clarity, bearing channels usually running in the Z-direction have been Fig. 3 and Fig. 4 not shown separately.

[0088] In Fig. 5 shows details of the safety carriage 1. The support devices 4.1, 4.2 each comprise two running wheels 7 and two guide wheels 8. The size-adjustable frame part 5 is designed as a two-part telescopic rod and therefore comprises a first rod part 10.1 and a second rod part 10.2. Furthermore, two stops 13 and a locking device 9 are shown.

[0089] In the Fig. 6 to 9, 11 to 12 and 14 to 16 schematically indicate how an operator 2 can be secured to the safety carriage 1 via at least one safety rope 19 and at least one snap hook 18.

[0090] In contrast to the perspective representation according to Fig. 6 are shown in the side views of the Fig. 7, Fig. 8, Fig. 9, Fig. 11, Fig. 12, Fig. 14, Fig. 15, Fig. 16 and Fig. 17 also the running rails 3 are indicated, whereby these in the variant according to Fig. 7 L-shaped, after Fig. 8 C-shaped, after Fig. 9 U-shaped, according to the Fig. 11, Fig. 14 and 15 S-shaped and in the variant according to the Fig. 12 and Fig. 16 are designed in cross-section as a horizontal line.

[0091] Regarding the Fig. 7 to 9 as well as 11 and 12 and 14 to 17 also indicate the Y and Z coordinates.

[0092] In the Fig. 9 and Fig. 11 it can be seen that the running rails 3 shown there each have two side limits 15. The L-shaped running rails 3 of the Fig. 7 each have only one page limit 15.

[0093] The horizontal sections of the running rails 3 in the Fig. 8 and Fig. 11 above the support surface 14 for the wheels 7 can provide storage areas 23 for pallets or the like.

[0094] The running rails 3 of the Fig. 12 and Fig. 17 have neither side boundaries 15 nor parking areas 23.

[0095] The Fig. 8 and Fig. The running rails 3 shown in Figure 11 are well suited as channel rails due to the storage areas 23.

[0096] In Fig. 10 shows that the safety carriage 1 essentially consists of the size-adjustable frame part 5 and the two support devices 4.1, 4.2.

[0097] In Fig. 13 shows an alternative version of a safety carriage 1.1. This differs from the one shown in Fig. 10 in that it does not comprise a size-adjustable frame part 5, but a rigid frame part 5.1.

[0098] The Fig. 14 to 16 show safety carriage 1 and running rails 3 similar to the Fig. 11 and Fig. 12, wherein each safety carriage 1 comprises two securing devices 26.1, 26.2 attached to a joint 27.

[0099] The Fig. 17 shows a safety carriage 1.1 and running rails 3 similar to those according to Fig. 12, wherein the securing carriage 1.1 comprises two guide grooves 28 for the fixing devices 26.3.

[0100] For the sake of clarity, not all features are provided with reference arrows and reference numbers in all figures.

[0101] Some details in the figures are only schematic and in particular not proportional. This applies in particular to the operator 2 in relation to the safety carriage 1 in the Fig. 6 to 9 and 11 and 12. Furthermore, the shapes of the running rails 3 and the fixing devices 26 are partly only indicated schematically.

[0102] Referring to the Fig. 1 to 17, the functioning of the device according to the invention is explained as follows: In normal operation, shuttles (not shown) drive into the racking structure 20. These shuttles are equipped with wheels, with the help of which they can move on and along the rails 3. The wheels of the shuttles (not shown) lie on the rails 3 as shown in the Fig. 7, Fig. 8, Fig. 9, Fig. 11, Fig. 12, Fig. 14, Fig. 15, Fig. 16 and Fig. 17 for the wheels 7 of the securing carriage 1. A load (also not shown) transported by the shuttles (not shown), for example a pallet, can be placed on the storage areas 23.

[0103] The racking structure 20 can be designed as a channel storage system. Typically, the travel rails 3 within the storage channels of the channel storage system, also referred to as channel rails, comprise the storage areas 23. Travel rails 3 outside the channels preferably do not comprise storage areas 23 and often also do not comprise side barriers 15. This is shown in the Fig. 3 and Fig. 4, where running rails 3.1, 3.2 running in the X-direction are shown, which are not channel rails and which do not include side boundaries 15 or parking areas 23.

[0104] If an operator 2 needs to move within the shelving structure 20, for example, for maintenance or repair work, they can secure themselves against falling with the aid of the safety carriage 1. The shelving structure 20 can comprise a plurality of, for example, over ten or even over 15 or more shelving levels, each of which has horizontally extending guide rails 3 arranged on it. These shelving levels often do not comprise a continuous floor, for example in the form of gratings or the like, so that the operator 2 can fall, for example, between the two guide rails 3 of a pair of guide rails 21. Due to the aforementioned number of shelving levels, the fall height within the shelving structure 20 can be considerable, making securing absolutely necessary.

[0105] In order to move safely, essentially horizontally, on foot on a given rack level, the operator 2 secures himself with the aid of the safety carriage 1 as follows: First, the safety carriage 1 is adjusted to a width of a pair of rails 21, measured in the z-direction, if it is a safety carriage 1 with a size-adjustable frame part 5. This is done by setting a size of the size-adjustable part 5. To do this, the locking device 9 is actuated and thus released, and then the first rod part 10.2 is pulled out of the second rod part 10.2 far enough that a distance between the two support devices 4 corresponds to a distance between the rails 3. The distance between the two support devices 4 is measured along the size-adjustable frame part 5.The distance is the shortest distance between the running rails 3, which is measured orthogonally to the longitudinal direction of the rails, i.e. the track width of the respective running rail pair 21.

[0106] By releasing the locking device 9, a spring-loaded bolt, for example, engages a corresponding recess in the first rod part 10.1 or in both rod parts 10.1, 10.2, to prevent relative displacement of the two rod parts 10.1, 10.2. Such locking devices 9 are generally known from the prior art; therefore, the previously described individual parts of the locking device 9 are not shown in the figures.

[0107] The above steps are not required for a safety trolley 1.1 with a rigid frame part 5.1.

[0108] After adjusting the size, if necessary, the support devices 4 are inserted or placed in or on the running rails 3 of a running rail pair 21.

[0109] The operator 2 is then secured by attaching the snap hook 18 between the two stops 13. The stops 13 limit the movement of the snap hook 18 along the (possibly size-adjustable) frame part 5.

[0110] The operator 2 can secure himself in the manner described above at any location within the shelving structure 20, provided he carries the safety trolley 1 with him or it is provided in another way at the place of use.

[0111] However, it can also be considered that the safety vehicle 1 is held in the holder 12 of the recovery vehicle 11 and is only removed from there when necessary. Fig. 1 and Fig. 2 is particularly easy to remove.

[0112] In principle, it can be envisaged that operator 2 first drives into the shelving structure 20 on the rails 3 with the aid of the recovery trolley 11, and then secures himself within the shelving structure 20 with the aid of the safety trolley 1, which will be explained in more detail below. Operator 2 drives the recovery trolley 11 manually via the hand crank 17, thus being independent of an external power supply in the event of a power failure.

[0113] If the operator 2 has arrived at the place of use within the racking structure 20, which in the view according to Fig. 3, the operator can prepare the safety trolley 1 as described above on the rails 3.2 of the rack level above. This situation is in Fig. 4. The operator 2 then secures himself to the safety carriage 1 using his personal protective equipment, in particular using a safety rope 19 with at least one snap hook 18. The overhead safety provided in this way is advantageous because the operator 2 falls into the safety rope 19 after only a very short fall height in the event of a fall.

[0114] If the running rails 3 on which the safety carriage 1 is to be placed are, for example, L-shaped, as shown in Fig. 7, the securing carriage 1 can be placed on the rails 3 in a simple manner. The operator 2, who is usually located below these rails 3, namely in the underlying shelf level, lifts the securing carriage 1 over the Fig. 7, then adjusts the size via the size-adjustable frame part 5 according to the distance between the rails 3 of the aforementioned pair of rails 21, comprising the two rails 3, and subsequently places the support devices 4 onto the rails 3. Before adjusting the size, the safety carriage 1 can be adjusted such that the distance between the support devices 4.1, 4.2 is as small as possible, and in particular, less than the distance between the rails 3.

[0115] It may also be considered to adjust the size according to the distance between the running rails 3 of the aforementioned running rail pair 21 before the lifting as described above, and then to rotate the safety carriage 1 accordingly in order to lift it overhead between the running rails 3 and then to place it on the running rails 3.

[0116] The operator 2 then secures himself with at least one snap hook 18 and at least one safety rope 19 by attaching the snap hook 18 between the stops 13 on the size-adjustable frame part 5. If the protective equipment of the operator 2 comprises two snap hooks 18, as shown in the Fig. 7 to 9 and 11, it may be considered to attach at least one of these snap hooks 18 to a safety eyelet 24 located there during a journey with the rescue vehicle 11. If the operator 2 then exits the rescue vehicle 11 to continue moving within the shelving structure, secured to the safety vehicle 1, the snap hook 18 is released from the connection to the safety eyelet 24. Both snap hooks 18 can then be attached between the stops 13 on the size-adjustable frame part 5 of the safety vehicle 1.

[0117] The above illustration for inserting the safety carriage 1 into L-shaped rails 3 also applies analogously to inserting the safety carriage 1 into U-shaped rails 3 according to Fig. 9 and in S-shaped rails 3 according to Fig. 11. The placement of the safety carriage 1 on a running rail 3 without side barriers, as shown in Fig. 12 is also carried out in an analogous manner.

[0118] If the running rails 3 into which the safety carriage 1 is to be inserted are, for example, C-shaped, as shown in Fig. 8, the insertion of the safety carriage 1 is also possible without great effort, provided it has a size-adjustable frame part 5. For this purpose, the first support device 4.1 is first inserted into one of the running rails 3 so that the running wheels 7 of the first support device 4.1 rest on the support surfaces 14 of this running rail 3. Before inserting the first support device 4.1, the safety carriage 1 is preferably adjusted such that the distance between the support devices 4.1, 4.2 is smaller than the distance between the running rails 3.

[0119] Subsequently, the size of the variable-size frame part 5 is adjusted according to the distance between the rails 3 of the pair of rails 21. During this adjustment, the second support device 4.2 is inserted into the opposite rail 3. Subsequently, the safety carriage 1 is in the Fig. 8, and the operator 2 can secure himself via at least one snap hook 18 on the size-adjustable frame part 5 between the stops 13.

[0120] In all of the aforementioned cases, the operator 2 can move at least a short distance along the rails 3 on or in which the safety carriage 1 has been loaded or inserted. This movement takes place outside the storage channels, i.e., along the X-direction, and within a storage channel, in the Z-direction. The safety carriage 1 travels along the support surfaces 14 of the rails 3 with the aid of its running wheels 7. If the rail 3 includes side barriers 15, these prevent unwanted movement of the safety carriage 1 transverse to the rails 3, i.e., in the Z-direction outside the storage channel and in the X-direction within the storage channel.The guide wheels 8 can rest against the side limits 15 of the guide rails 3, in order to ensure, together with the running wheels 7, both a secure hold of the safety carriage 1 within the guide rail 3 and to allow movement of the safety carriage 1 along the guide rail, i.e., in the X direction (or in the Z direction in the storage channel). The operator 2 is always secured against falling in the negative Y direction on the safety carriage 1.

[0121] The safety carriage 1, mounted overhead in this way and easily movable at least in sections along the rails 3, allows the operator 2 a large radius of action without the need for the previously frequently required re-securing. Re-securing here means that the operator 2 must frequently detach and re-secure their personal protective equipment, in particular the safety rope 19 and snap hooks 18, after moving a certain distance within the shelving structure 20. Such re-securing was frequently necessary in the prior art when the personal protective equipment of the operator 2, for example a safety rope 19 with snap hooks 18, was attached to corresponding eyelets mounted on the shelving structure 20.

[0122] A securing trolley 1 according to the present invention provides at least two advantages compared to securing on eyelets mounted on the shelf structure 20: Firstly, no eyelets need to be mounted on the shelving structure 20, since securing is possible with the help of the safety carriage 1 in the guide rails 3, which are present everywhere in the shelving structure 20.

[0123] Secondly, the use of the safety carriage 1 simultaneously allows the safety ropes 19 to be kept short, while still allowing the operator 2 a certain degree of mobility along the rails 3. With a known safety device using eyelets attached to the rack structure 20, the two aforementioned advantages usually exclude each other: Since the eyelets in the prior art are immovably mounted on the rack structure 20, greater mobility of the operator 2 along the rails 3 without re-securing always requires longer safety ropes 19, which in turn results in a greater fall height in the event of a slip.

[0124] Although cross braces 25 between the rails 3.2 can allow the operator 2 to move along the rails 3.2, i.e. parallel to the X-direction in Fig. 4, sometimes to a few meters or even to approximately one meter, for example. The reason for this is that a safety rope 19 attached to the safety carriage 1 for securing the operator 2, who is standing on the underlying rack level, for example, on the travel rails 3.1, passes through the gaps between the travel rails 3.2 and the cross braces 25. These gaps allow only limited mobility in the x-direction, which is due to Fig. 4. However, even a mobility of one meter along the rails 3.2 with a constant length of the safety rope 19 can significantly facilitate the work of an operator 2 in the rack assembly 20. Analogous considerations apply to the securing devices 26.1, 26.2, 26.3 described below, which also restrict the mobility of the safety carriage 1 along the rails 3 in the case of cross braces 25.

[0125] If the running rails 3 within the storage channels (not shown) also have cross braces 25, the above considerations also apply to securing by means of securing carriage 1 in the storage channel.

[0126] Regarding the Fig. 7 to 9, 11, and 14 to 15, it should be mentioned that the support surface 14 of the running rails 3 runs parallel to the xz-plane, while the side limitation 15 of the running rails 3 runs parallel to the xy-plane.

[0127] The locking devices 26.1 ensure a reversible locking of the safety carriage 1 relative to the running rails 3. Starting from the Fig. 15, the fixing devices 26.1 rotate around the joints 27 in order to Fig. 14. A comparison of the Fig. 14 and Fig. 15 it can be seen directly that the claw-like securing devices 26.1 prevent a movement of the safety carriage 1 in the Y-direction by gripping under the support surfaces 14. Fig. 14 Sections of the securing devices 26.1 running parallel to the Y-direction, which do not engage below the support surfaces 14, would come into contact with the support surfaces 14 during a movement of the safety carriage 1 in the Z-direction. This prevents unwanted displacement of the safety carriage 1 along the Z-direction. This is particularly advantageous when the safety carriage 1 is used on rails 3 without side stops 15.

[0128] Fig. 15 thus shows a release position with respect to the fixing devices 26.1, while Fig. 14 shows a fixing position.

[0129] The Fig. The fastening devices 26.2 shown in Fig. 16 cannot engage under the support surfaces 14 and therefore do not provide a reversible, positive locking in the Y-direction. In the folded-down state, which is shown on the left in Fig. 16, this locking device 26.2, like the locking device 26.1, effects a reversible, positive locking against an unwanted movement of the safety carriage 1 in the Z direction.

[0130] The Fig. The fixing devices 26.3 shown in Figure 17 are similar to the claw-like ones shown in Figures Fig. 14 and Fig. 15 shown locking devices 26.1. However, the locking devices 26.3 are arranged to be movable in a guide groove 28, which is rigidly connected to the safety carriage 1.1. The locking devices 26.3 are therefore movable in the Z-direction in order to reversibly change from the locking position to the release position. The locking devices 26.3 shown on the left in Fig. The locking device 26.3 shown in Figure 17 is in the locking position, which prevents unwanted movement of the safety carriage 1.1 in the Y-direction by positively engaging the support surface 14. The Fig. The locking device 26.3 shown in Figure 17 is in the release position, which allows the removal of the safety carriage 1.1 from the running rails 3. Fig. 17, particularly from the securing position shown on the left, it is immediately apparent that the securing device 26.3 does not provide a stop for the running surface 14 or the running rail 3 against undesired movement in the Z direction. A positive locking of the safety carriage 1.1 against undesired horizontal movements orthogonal to the longitudinal direction of the rail, i.e. along the Z direction, is therefore not achieved when the securing devices 26.3 are used. The distance measured in the Z direction between a horizontally running section of the securing device 26.3 and the running rail 3 or the running surface 14 is too large for this. The securing device 26.3 can therefore preferably be used when horizontal movement orthogonal to the longitudinal direction of the rail is unproblematic, or when the running rails 3 include lateral stops 15 that prevent the aforementioned movement.

[0131] Regarding the Fig. 16 and Fig. 17, it should be added that one of the locking devices 26.2, 26.3 is in the locking position and the other is in the release position. This illustration is for clarity only. Typically, both locking devices 26.2, 26.3 are moved to the same position, which can be done manually, for example, to either release the safety carriage 1, 1.1 or to secure it to the guide rails 3.

[0132] The locking devices 26.1, 26.2, and 26.3 therefore always prevent at least one undesired movement orthogonal to the longitudinal direction of the rail. These undesired movements, which are orthogonal to the longitudinal direction of the rail (X-direction), and which must therefore be prevented, can be vertical movements in the Y-direction and horizontal movements in the Z-direction.

[0133] Although only a few preferred embodiments of the invention have been described and illustrated, it is obvious that those skilled in the art can add numerous modifications without departing from the spirit and scope of the invention. In particular, the following modifications are contemplated.

[0134] Instead of the running wheels 7 and in particular instead of the guide wheels 8, sliding blocks or the like can be used.

[0135] Out of Fig. 10 shows that the safety carriage 1 preferably consists of the variable-size frame part 5 and the two support devices 4.1, 4.2. Alternatively, it can be considered that the safety carriage 1 merely comprises the frame part 5 and the support devices 4, i.e., consists of the aforementioned and additional components.

[0136] Wheel axles (not shown) of the wheels 7 preferably run parallel to the longitudinal direction of the variable-size frame part 5 and in the arrangement according to the Fig. 7 to 9 and 11 and 12 in the z-direction. The wheel axes of the guide wheels 8 are orthogonal to this, and thus in the arrangement according to the Fig. 7 to 9 and 11 in Y direction.

[0137] Securing the operator 2 using the snap hook 18 on the safety carriage 1, i.e., securing or fastening the snap hook 1, particularly to the size-adjustable frame part 5 between the stops 13, can be done at any time. It is also possible to attach the snap hook 18 to the safety carriage 1 before it is inserted into or placed on the guide rails 3.

[0138] The personal safety equipment of the operator 2 can always comprise two safety ropes 19, each with a snap hook 18, as shown in the Fig. 7 to 9 and 11. This allows for safe re-securing, since, for example, before removing one snap hook 18 from the securing trolley 1, the other snap hook 18 can be attached to, for example, an anchor point or the like on the shelf structure 20.

[0139] Such a securing arrangement can also be used immediately after the operator 2 has reached the scene with the rescue vehicle 11 and while they are placing the safety vehicle 1 onto or into the rails 3. In particular, the overhead insertion or insertion of the safety vehicle 1 can pose the risk of an accident if the operator 2 slips, for example. In this case, it can therefore be considered that the operator 2 secures himself to an anchor point or the like using one of the snap hooks 18. The other snap hook 18 can be permanently attached between the stops 13, or at the latest after the safety vehicle 1 has been installed on the rails 3.

[0140] The change in the size of the safety carriage 1 preferably always refers to a distance between the support devices 4. Alternatives to adjusting the size via a telescopic rod are conceivable, however, the size-adjustable frame part 5, which connects the support devices 4, can be designed differently than shown in the figures.

[0141] It is also possible to use a single wheel (not shown) as the support device instead of the illustrated support device 4 with wheels 7, for example, on both sides, so that the size-adjustable frame part 5 serves as the axle for these wheels. Other alternative designs of the support device are conceivable.

[0142] For the sake of clarity, the cross braces 25 are only shown in Fig. 4, but not in Fig. 3. The spacing of these cross braces 25 from one another can vary, as can their structure. Furthermore, shelving structures 20 without cross braces 25 can also be considered.

[0143] In the figures and the corresponding description, safety carriages 1 with variable-size frame parts 5 were primarily shown. However, it can always be considered to use a safety carriage 1.1 with a rigid frame part 5.1. A corresponding safety carriage 1.1 can be used in the same way as described for the safety carriage 1 with variable-size frame part 5. Only insertion into a C-shaped guide rail 3, which is in Fig. 8, requires a size-adjustable frame part 5. Furthermore, all statements concerning the safety carriage 1 also apply analogously to the safety carriage 1.1.

[0144] Although the safety carriage 1 preferably comprises two securing devices 26.1, 26.2, 26.3, depending on the nature of the storage structure 20 and in particular of the running rails 3, it may be sufficient to provide only one securing device 26.1, 26.2, 26.3 on the safety carriage 1. Furthermore, the Fig. The securing devices 26.1, 26.2, and 26.3 shown in figures 14 to 17 are optional. Therefore, safety carriage 1 can also be designed without securing devices 26.1, 26.2, and 26.3.

[0145] The reversible positive locking against undesired displacement in the Z direction is particularly important when using guide rails 3 which do not have side stops 15.

[0146] The fixing devices 26.1, 26.2, 26.3 can be used with all the running rails 3 shown, in particular with all the cross-sections shown.

[0147] On a safety carriage 1 with a size-adjustable frame part 5, one of the securing devices 26.1, 26.2, 26.3 can be fastened to a rod part 10.1, 10.2, as shown in the Fig. 14 to 16. Of course, the securing devices 26.1, 26.2, 26.3 can also be attached to a rigid frame part 5.1 of an alternative safety carriage 1.1.

[0148] The racking system can include pairs of rails 21 with different track widths. The track width of the Fig. 3 and Fig. 4 shown rails 3.1, 3.2 is measured in the Z direction, i.e. orthogonal to the longitudinal direction of the rail, which is not noted in the figures.

[0149] The securing of an operator 2 and, in general, the use of the securing carriage 1, 1.1 within a storage channel essentially proceeds in the same way as described above for securing outside such a storage channel.

[0150] Usually, for storage channels (not shown separately) running rails 3 with side barriers 15 are used in accordance with the Fig. 7, Fig. 8, Fig. 9 and Fig. 11, and in particular with parking areas 23 according to the Fig. 8 and Fig. 11. Outside the storage channels, however, the running rails 3 are preferably designed as shown in Fig. 12. However, the guide rails inside and outside the storage channels can be designed differently, either completely or partially, or in sections. Side barriers 15 and parking areas 23 can also be used outside the storage channels. Within storage channels, for example, guide rails 3 with parking areas 23 (often called "channel rails") can be dispensed with if separate parking areas 23 are provided for pallets or other loads.

[0151] Nevertheless, the Fig. 8 and Fig. 11 running rails 3, which are particularly preferred for use as channel rails.

[0152] The Fig. The securing devices 26.2 shown in Figure 16 can also be rigidly attached to the safety carriage 1; the joints 27 are thus optional. Preferably, only the securing devices 26.1, 26.3, which are intended to engage under the rails 14 to secure them against undesired movement in the Y direction, need to be arranged so as to be movable relative to the safety carriage 1.

[0153] For the sake of clarity, the Fig. 7 to 9, 11 to 12 and 14 to 17, the directions are chosen as if the rails were shown outside the storage channel. Fig. 3 and Fig. 4, it has already been mentioned that a longitudinal direction of the (not shown) storage channels is usually the Z-direction. The guide rails 3 of the Fig. 7 to 9, 11 to 12 and 14 to 17 show variants of the running rails 3.1, 3.2 of Figure 4. Dimensions of the running rails 3 in the schematic Fig. 7 to 9, 11 to 12 and 14 to 17 are not to scale. It should also be emphasized that, depending on the particular rack construction and the respective requirements, both the guide rails 3 inside the storage channels and the guide rails 3 outside the storage channels can be designed in the same way as each of the Fig. 3 to 4, 7 to 9, 11 to 12, and 14 to 17. It is merely preferred, but not mandatory, that side barriers 15 and parking areas 23 be used primarily in the storage channels and not outside the storage channels.

[0154] Alternatively or in addition to the hand crank 17, the recovery vehicle 11 can comprise a drive which is supplied with energy, for example, by a battery (not shown).

[0155] In all embodiments, the stops 13 are preferred but not mandatory.

[0156] The locking device 9 can be designed differently than shown in the figures in order to lock the rod parts 10.1, 10.2 relative to each other.

[0157] The arrangement of the securing device 26.1, 26.2, 26.3 on the safety carriage 1, 1.1 can be different from that shown in the figures. In addition to the rigid connection and a connection via a guide groove 28 or the like, or via a joint 27, other alternatives can be considered, resulting in a rigid or movable arrangement on the safety carriage 1, 1.1. Instead of the guide groove 28, alternative linear guides can be considered.

[0158] The locking device 9 allows several locking positions, for example, to adapt the safety carriage 1 to different track widths. List of reference symbols 1 security car 2 operators 3 running rails 4 support device 5 adjustable frame part (telescopic rod) 6 Safety device (safety rope) 7 Wheel 8 Guide wheel 9 Locking device 10 rod part 11 recovery vehicles 12 recordings 13 stop 14 Support surface of the running rail 15 Side limit of the running rail 16 seats 17 Hand crank 18 snap hooks 19 Safety rope 20 Shelving construction 21 pair of running rails 22 control panel / switch panel 23 parking space 24 safety eyelet 25 Cross brace 26 Fixing device 27 joint 28 guide groove

Claims

[1] Height safety device (1) for securing an operator (2) in a shelving structure (20) which has parallel running rails (3), wherein the height safety device (1) has at least two support devices (4) for storage in or on the rails (3), wherein the support devices (4) are connected to one another via a frame part (5), and wherein the height safety device (1) is designed to allow the connection of a safety device (6) for securing the operator (2), characterized by a fixing device (26) for the reversible, positive fixing of the height safety device (1) to a running rail (3). [2] Height safety device (1) for securing an operator (2) in a shelving structure (20) which has parallel running rails (3), wherein the height safety device (1) has at least two support devices (4) for storage in or on the rails (3), wherein the support devices (4) are connected to one another via a frame part (5), and wherein the height safety device (1) is designed to allow the connection of a safety device (6) for securing the operator (2), characterized by that the frame part (5) is variable in size. [3] Height safety device (1) according to claim 1 or 2, characterized by that the support devices (4) each comprise at least one impeller (7). [4] Height safety device (1) according to at least one of the preceding claims, characterized by at least one guide device (8) which is designed to come into contact with a side boundary (15) of the running rail (3). [5] Height safety device (1) according to at least one of the preceding claims, characterized bythat the frame part is variable in size, in particular comprises a telescopic rod (5) or consists of such a rod. [6] Access and safety system comprising a rescue vehicle (11) with a receptacle (12) for a height safety device (1) according to at least one of claims 1 to 5 and such a height safety device (1). [7] Storage system comprising a rack structure (20) with parallel running rails (3) and a height safety device (1) according to at least one of claims 1 to 5. [8] Storage system according to claim 7, characterized by a first plurality of running rails (3) with a first track width and a second plurality of running rails (3) with a second track width. [9] Storage system according to one of claims 7 or 8 comprising a recovery vehicle (11) with a receptacle (12) for the height safety device (1). [10] Method for securing an operator with a height safety device (1) according to at least one of claims 1 to 5 or 2 to 5 in a shelving structure (20) with several shelf levels, the method comprising the following steps: - Inserting or placing the support devices (4) into a guide rail (3) of the shelving structure (20) or onto a guide rail (3) of the shelving structure (20) - Securing the operator (2) to the height safety device (1). [11] Method according to claim 10 for securing an operator (2) with a height safety device (1) according to at least claim 3 in a shelving structure (20), the shelving structure (20) comprising rails (3) which are substantially U-shaped or L-shaped in cross-section and / or rails (3) which are substantially C-shaped in cross-section, the method comprising the following steps: - Lifting the fall arrest device (1) over a pair of U- or L-shaped rails on which the fall arrest device (1) is to rest, or inserting a first support device (4.1) into a C-shaped rail (3) - Setting a size of the variable-size frame part (5) according to the distance between the rails (3) of the pair of rails, - Placing the support devices (4) on the U- or L-shaped cross-section rails (3) or inserting a second support device (4.2) into another C-shaped cross-section rail (3). [12] Method according to one of claims 10 or 11, characterized by a positive fixing of the height safety device (1) to the running rail (3) by means of a fixing device (26). [13] Method for safely entering a shelving structure (20) using a system according to claim 6, characterized byfollowing steps: - Driving into the racking structure (20) with the help of the recovery vehicle (11) - Securing an operator (2) according to one of claims 10 to 12. [14] Use of a height safety device (1) according to at least one of claims 1 to 5 for securing an operator (2) in a shelving structure (20). [15] Use of a system according to claim 6 for entering a shelving structure (20) and for subsequently securing an operator (2) in this shelving structure (20).

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