Device and method for strapping palletized packaged goods

Abstract

The invention relates to a device (1) for strapping palletized packaged goods (2), at least having a dispensing device (3) for providing a strapping band (4) and a band guiding device (5) for strapping the packaged goods (2) with the strapping band (4). According to the invention, the band guiding device (5) has at least one upper arm (6) and a lower arm (7) for guiding the strapping band (4), the upper arm (6) having an outlet region (6a) for guiding out a band end (4a) of the strapping band (4), the lower arm (7) having an inlet region (7a) for introducing the band end (4a), and the band guiding device (5) having an at least approximately vertical air gap (8) between the outlet region (6a) and the inlet region (7a). Furthermore, a weight element (9) of the band guiding device (5) can be detachably fastened to the strapping band (4) such that the strapping band (4) together with the weight element (9) can be fed to the inlet region (7a) of the lower arm (7) along the air gap (8) under the effect of gravity.

Description

[0001] Device and method for strapping palletized packages

[0002] The present application claims priority from German patent application No. 10 2024 121 263.2, the contents of which are incorporated herein in full by reference.

[0003] The invention relates to a device for strapping palletized goods.

[0004] The invention further relates to a method for strapping palletized goods with a strapping band.

[0005] For storage and / or transport, goods, merchandise, and / or building materials (hereinafter also referred to as "packaged goods") are frequently packed on pallets. Pallets can be advantageously stacked and moved as needed using pallet jacks or forklifts. A preferred method for securing the items on the pallets is strapping.

[0006] Boxes, cartons and / or packages can also be closed or tied using strapping tape.

[0007] One challenge when strapping goods arranged on pallets is that the strapping band must pass through a gap or space between the goods and the floor on which the goods and pallet are standing. The strapping band should then be guided around the goods with minimal, ideally no, manual effort.

[0008] Various strapping devices are known from the prior art. Previously known stationary solutions, especially those suitable for large packages, are mostly bulky and inflexible in terms of their positioning and application, but they do enable fast and automated strapping.

[0009] In the prior art, fully automatic, stationary strapping systems are particularly well-known, in which the goods are fed in by means of a conveyor belt. The belt guide, which guides the strapping band around the goods, is usually designed as a channel that surrounds the goods. The strapping band is then shot through the channel from the band roll and subsequently tensioned, welded, and cut fully automatically.

[0010] From EP 0 725 005 B1, a stationary strapping device is known in which the strapping band is shot around the packaged goods. The strapping band moves with the assistance of compressed air along at least one air path, meaning that it is not guided in a channel in certain sections. The strapping device known from EP 0 725 005 B1 is not suitable for strapping pallets. Stationary strapping devices known from the prior art enable fast and reliable strapping of packages, but they are not mobile and can therefore only be used for specific applications. Furthermore, the rigid channel makes stationary strapping devices not universally applicable enough. In addition, the channel under the pallet must be closed, which requires considerable space.

[0011] With mobile solutions, the strapping band must be guided around the package at least partially manually; that is, a closed loop cannot be formed around the package without further intervention or solely by the strapping device. Problems can arise particularly if the package is so tall that the operator can no longer easily reach the top.

[0012] A particularly advantageous mobile device for guiding a strapping band around packaged goods is known from EP 1 053 941 B1. A particularly advantageous further development of this device, which enables a higher strapping speed and optimizes the determination of the deflection point, is known from EP 3 877 267 B1.

[0013] EP 1 053 941 B1 describes a device for strapping or rebundling a palletized load, comprising a strap guide and at least one clamping device arranged at the front end of the strap guide for clamping an initial section or a front end of the strapping band. EP 1 053 941 B1 and the further development according to EP 3 877 267 B1 feature a back-rigid chain, a guide carriage, a deflection unit, and a length-limiting band, which interact such that the strapping band can be guided under the pallet, then deflected by approximately 90° and thus moved almost vertically upwards, and after reaching the top of the pallet, is deflected again and returned by a substantially vertical movement. After the strap guide has guided the strapping band around the packaged goods, the front end orThe front end of the strapping band is tensioned and then preferably welded to a section of the strapping band that is still connected to the remaining strapping band on the supply roll or reel. The welding device is connected to the strapping device via a guide.

[0014] Behind the weld, the strapping is cut, thus severing the connection to the remaining strapping on the roll. The resulting exposed end of the strap can then be used for another strapping operation.

[0015] The aforementioned devices, known from the prior art, have proven to be very advantageous, particularly for enabling mobile strapping of packages and minimizing manual labor. These devices are also especially useful for relatively tall packages.

[0016] The mobile strapping devices known from EP 1 053 941 B1 and EP 3 877 265 B1 enable advantageous mobile strapping, significantly reducing manual labor, such as walking around the pallet, bending, and / or manually joining the strap ends, compared to other mobile solutions. Furthermore, compared to other mobile strapping devices, the pallet can be strapped reliably and at a high speed.

[0017] Nevertheless, it would be desirable, especially when strapping particularly tall goods, if there were alternative solutions to those from EP 1 053 941 B1 and EP 3 877 265 B1, which are preferably also mobile and enable reliable strapping at a high strapping speed.

[0018] The present invention is based on the objective of creating an advantageous device for strapping palletized goods, which can be used for different pallet dimensions, in particular with different widths and heights, and enables high strapping speeds.

[0019] According to the invention, this problem is solved by a device having the features mentioned in claim 1.

[0020] The present invention further aims to provide a method for strapping palletized goods with a strapping band that can be used for different pallet dimensions, in particular with different widths and heights, and enables high strapping speeds.

[0021] According to the invention, this problem is solved by a method with the features mentioned in claim 19.

[0022] Advantageous embodiments of the device and method according to the invention are shown, among other things, in the respective dependent claims and in the following description.

[0023] The device according to the invention for strapping palletized goods comprises at least one dispensing device, preferably a strapping roll, for providing a strapping band and a strapping guide for strapping the goods with the strapping band. The strapping guide has at least one upper arm and one lower arm for guiding the strapping band, the upper arm having an exit area for dispensing one end of the strapping band and the lower arm having an entry area for inserting the end of the band, and the strapping guide having an approximately vertical air gap between the exit area and the entry area.It is further provided that a drop body of the band guide device can be detachably attached to the strapping band, so that the strapping band with the drop body can be fed to the entry area of ​​the lower arm by gravity along the air path.

[0024] The strapping band can be guided by gravity along the air path to the entry area of ​​the lower arm, controlled by the falling body.

[0025] The device according to the invention allows the packaged goods to be secured on the pallet in a particularly advantageous manner by preferably completely encircling them with the strapping band. At least the upper arm, the air gap, and the lower arm of the strapping guide work together to guide the strapping band around the packaged goods or the pallet.

[0026] The upper arm, the air section and the lower arm of the strapping device can interact with a vertical transport device or a return device described in more detail below to guide the strapping band around the packaged goods on all sides.

[0027] The inventor has recognized that by having the strapping guide device have an at least approximately vertical air gap and by allowing the strapping band with the falling body to be guided by gravity along the air gap, starting from the exit area of ​​the upper arm, to the entry area of ​​the lower arm, the strapping direction, as known from EP 1 053 941 B1 or EP 3 877 267 B1, can be reversed.

[0028] The solution according to the invention thus offers a particularly advantageous approach to strapping reliably and at a high strapping speed, with a strapping direction reversed compared to EP 1 053 941 B1 or EP 3 877 267 B1, which has proven advantageous in order to be able to use standardized strapping joining devices or closure devices or welding devices in the orientation or alignment intended for their handling.

[0029] This is made possible by the inventor's realization that movement of the front end of the strapping band on the side of the pallet or packaged goods, away from the dispensing device or the band roll, can be reliably achieved by using a drop body which pulls the strapping band behind it.

[0030] Furthermore, the use of the drop element in combination with the upper and lower arms eliminates the need for a closed channel for the strapping band, as described above in connection with fully automatic, stationary strapping systems according to the prior art. The drop element advantageously solves the challenge of guiding the band along the side of the packaged goods opposite the position of the device, strapping machine, or dispensing unit for the strapping band. While a (closed) vertical channel connecting the upper and lower arms would provide good guidance, it is not feasible or suitable for practical implementation. Such a vertical channel cannot be attached to the lower arm, which is guided under the packaged goods or through a gap in the pallet for extension.However, placing such a channel (with the necessary mechanics) on the upper arm would be too heavy, too large, too top-heavy, and not sufficiently stable.

[0031] The inventor solved this problem in the device according to the invention using the falling weight or the falling body.

[0032] The falling weight, together with the lower and upper arms, enables advantageous belt guidance from top to bottom on the opposite side of the packaged goods, without the need to create a vertical channel there.

[0033] Unlike the known strapping devices according to EP 1 053 941 B1 or the

[0034] EP 3 877 267 B1 states that the maximum height of the pallets that can be strapped by the device according to the invention is not limited. The strap guide with the drop body over the at least approximately vertical air gap can also be used with greater pallet heights and does not depend on a self-supporting strap guide element, for example, a back-rigid chain. Furthermore, the device according to the invention, due to its lower arm, which is preferably essentially free-floating or self-supporting, can also be used for pallets that have comparatively high pallet timbers, crossbeams, or other wooden or metal bracing between the pallet spaces.

[0035] It has been shown in particular that the device according to the invention is easy to operate and handle. Compared to mobile strapping devices from the prior art, and also compared to EP 1 053 941 B1 and EP 3 877 267 B1, it can be advantageous that the end of the strap is routed under the packaged goods, starting from the side of the pallet or the packaged goods facing away from the dispensing device or the strap roll.

[0036] The operator's workflow for tensioning and connecting the strap end to a strap section is modified compared to strapping devices known from EP 1 053 941 B1 and EP 3 877 267 B1, making it possible to use standardized strap splicing devices or welding machines. Standardized strap splicing devices are generally designed for right-handed operation, whereas the strapping direction according to EP 1 053 941 B1 and EP 3 877 267 B1 requires left-handed operation of such devices. This allows the strap end to be positioned as needed under another strap section connected to the dispensing device or the strap roll in order to connect the strap end to the section. With the device according to the invention, the standardized strap splicing devices can be operated in the right-handed manner as intended by reversing the strapping direction.

[0037] Palletized goods or palletized loads can consist of one or more items or goods of any kind, such as merchandise or building materials, on a pallet.

[0038] The pallet can be a Euro pallet or another type of pallet (load carrier). Palletized goods can also refer to goods that stand on wooden supports and are to be held together by strapping, for example, a stack of boards.

[0039] Preferably, the pallet or transport pallet has at least one, preferably at least two, lateral recesses or pallet gaps, which serve to lift and / or transport the pallet in a generally known manner using the forks or tines of a material handling device, in particular a forklift, pallet jack, or pallet truck. The pallet gaps are generally bounded at least partially on two sides, from above, and usually also from below by pallet timbers. Furthermore, the pallet gaps are generally recesses extending horizontally from one side of the pallet to the opposite side.

[0040] The dispensing device is preferably a tape reel or a supply reel from which the strapping tape can be unwound or on which the strapping tape is at least partially wound. For the sake of simplicity, the dispensing device will also be specifically referred to as a tape reel below. However, this is not to be understood as a limitation. Unless explicitly excluded, a tape reel can always also refer to a dispensing device in general. The disclosure is to be understood accordingly.

[0041] The end of the strap, which is guided around the packaged goods by means of the strap guide device, is a front end of the strapping band provided by the strap roll.

[0042] The strapping band may be partially unwound from the roll, with the strapping band having a free end. It is preferably provided that the strapping band is guided from the roll to the upper arm.

[0043] The strapping band may be guided along the upper and / or lower arm or the upper and / or lower lance by a suitable guide, for example, a guide rail. Preferably, the strapping band may be guided through the upper and / or lower arm, for example, through an internal channel.

[0044] Preferably, the strapping guide, in particular the upper arm and / or the lower arm, is configured to pull the strapping band at least partially around the packaged goods. The strapping band can be pulled by or during the extension and retraction of the arms. Alternatively, the strapping band can be pulled by a separate mechanism, optionally even when the arms are already extended.

[0045] The airspace is in particular a free space in a vertical direction, which is suitable for the falling body and the strapping band attached to it to pass through or fall through.

[0046] The exit area or headpiece of the upper arm for ejecting and / or dropping the falling object defines, in particular, the beginning of the air gap. Similarly, the entry area or headpiece of the lower arm for introducing and / or catching the falling object defines an end of the air gap. In other words, the air gap lies on the preferably at least approximately vertical connecting line between the exit area and the entry area.

[0047] The drop body preferably has a fastening device, and more preferably a clamping device, i.e. the drop body can be fastened to the strapping band preferably by clamps and / or a wedge.

[0048] To release the strapping band from the drop body, the clamping device may be provided with a retaining mechanism that releases the strapping band when the drop body moves against its direction of rotation. Alternatively, the clamping device may be designed to release the strapping band by manual action of the operator, either by releasing the clamping mechanism and / or wedge.

[0049] It can be particularly advantageous if the dropper can be detachably attached to a front end or band end of the strapping band, especially by clamping. In this case, the exit area is preferably designed and configured to expel the dropper with the attached band end. Likewise, in this case, the entry area is preferably designed and configured to insert the dropper with the attached band end, especially to catch the dropper.

[0050] In the context of this invention, "gravity-driven" means that the process is essentially driven by the downward force of gravity. The weight of the falling body attached to the strapping band allows the strapping band to be fed to the lower arm in a particularly advantageous manner. Specifically, the strapping band falls over an at least approximately vertical or perpendicular air path.

[0051] During air travel, the strapping band, which is weighted by the drop weight preferably attached to the end of the band, is driven or pulled at least predominantly by gravity. The entry area for inserting the end of the strapping band into the lower arm is preferably designed as a catch area, and more preferably as a funnel.

[0052] The falling body is preferably shaped and preferably has such a weight and / or weight distribution that it falls as rotationally stable as possible, i.e. without twisting and / or tilting, at least approximately vertically downwards and is deflected as little as possible from its vertical fall distance or air path by wind or other air currents.

[0053] Preferably, the device according to the invention is used such that the strapping band is guided on its path first at least approximately horizontally over the packaged goods, then at least approximately vertically laterally past the packaged goods, and finally at least approximately horizontally under the packaged goods, in particular through a pallet gap. The strapping band is preferably guided in a pulling manner, whereby the falling movement along the at least approximately vertical air path can also be understood as pulling.

[0054] It is not strictly necessary for the drop element to be permanently and / or continuously attached to the strapping band. However, it has proven particularly suitable if the drop element is attached to the strapping band, or at least to a leading section of the strapping band (viewed from the direction of rotation), preferably at the end of the band, to guide the strapping band over the air gap. The direction of rotation refers to the direction of the strapping process, i.e., the movement the strapping band makes during the strapping process. It is also possible for the drop element to be attached to the strapping band, or to remain attached, to guide the strapping band over the upper and / or lower arm.

[0055] It is sufficient if the strapping band is guided by the strapping guide at one point or section of the strapping band. The remaining strapping is then pulled or carried along by the guided section.

[0056] The tape roller and the tape guide device with the upper arm and the lower arm can be held in particular by a frame of the device.

[0057] It has proven advantageous if the upper arm and / or the lower arm is self-supporting. In particular, this allows the upper arm and / or the lower arm to be suspended freely.

[0058] It is particularly advantageous if the upper arm and / or the lower arm are extendable and retractable, respectively, with the upper arm and / or the lower arm preferably being designed as a telescopic arm. This allows the device to be particularly space-saving for storage and / or transport and also to be flexibly adapted for use with differently sized packages, especially with regard to the depth or width of the package.

[0059] Furthermore, this enables the strapping of pallets, allowing multiple strapping operations to be performed on the same pallet by moving the device parallel to the pallet. Unlike a possible embodiment with fixed arms, the device, particularly because the lower arm is retractable, does not need to be withdrawn from the pallet to disengage the lower arm from the pallet gaps. When the lower arm is retracted, the device can be moved parallel to the pallet without first having to increase the distance between the device and the pallet. Thus, the space and time required to perform multiple strapping operations on a pallet are significantly reduced when the arms, preferably at least the lower arm, are designed as telescopic arms.

[0060] Preferably, both arms should be extendable equally, especially to the same length.

[0061] When the upper and / or lower arm is extended, the air gap is formed, in particular, between the exit area of ​​the upper arm and the entry area of ​​the lower arm. Relative to the attachment point of the arms to the remaining components of the device or the device housing, which also accommodates the belt roller, the air gap is preferably located on the opposite side of the packaged goods or the pallet. Furthermore, when extended, the arms are preferably at least as long as the packaged goods are deep, so that the arms extend above or through the packaged goods.

[0062] The air gap is located, in particular, on the preferably at least approximately vertical connecting line between the exit area and the entry area when both arms are extended. It is specifically not intended that the strapping band or the band end be guided over the air gap when one or both arms are retracted.

[0063] The upper arm and / or the lower arm can be extendable or retractable, particularly telescopically. If the upper arm and / or the lower arm is designed as a telescopic arm or telescopic rail, it is preferably multi-stage, in particular with 2 to 10 stages. The arms can also be lances.

[0064] Preferably, the upper arm and / or the lower arm is motorized for extension and retraction, more preferably by an electric motor.

[0065] The device is preferably designed to counteract the resulting weight shift during extension or retraction.

[0066] To compensate for the retraction of the arms. For this purpose, a counterweight can be provided, which is preferably arranged on a side of the device opposite the extension direction of the arms.

[0067] In a preferred embodiment of the invention, it is provided that the falling body can be engaged or disengaged from an upper locking device of the upper arm and / or from a lower locking device of the lower arm.

[0068] This allows, in particular, the extension of the upper arm and / or the retraction of the lower arm to be used to guide the strapping band.

[0069] The guidance, in particular the carrying of the belt end during the extension of the upper arm and / or the retraction of the lower arm, can also be achieved differently, by a different mechanism. For example, a runner can be arranged on the upper arm and / or the lower arm that carries the belt end along, regardless of whether the respective arm is extending or retracting.

[0070] The upper locking device is preferably arranged at the exit area of ​​the upper arm. The lower locking device is preferably arranged at the entry area of ​​the lower arm.

[0071] The locking devices or latches are preferably designed to selectively hold or release the falling object. This can be achieved, for example, through suitable control or a self-regulating mechanism.

[0072] It may preferably be provided that the upper locking device has a spring-loaded folding mechanism and / or a magnetic latch for the drop body and / or that the lower locking device is designed as a backstop latch and / or one-way clamp for the drop body.

[0073] The term "locking device" should be understood to mean that while a locking and unlocking mechanism is preferred, the term is not limited to this. The connection to the dropper can generally be achieved by holding the dropper, carrying the dropper, or locking the dropper. The term "locking device" does not imply that the connection or release is only possible via locking or unlocking.

[0074] The locking device can also simply be a holding device that holds the falling body on the upper or lower arm. Within the scope of the invention, the term "locking device" can also be replaced by "holding device." The holding device can, in particular, also be a drive device or a locking device arranged as described above with regard to the locking device. The holding device can, in particular, also be a locking device. It has proven particularly suitable if a return mechanism is provided for guiding the falling body from the lower arm towards the upper arm, which preferably runs parallel to the air gap.

[0075] The return device serves in particular to transport the falling body, preferably from bottom to top over the entire length of the return device.

[0076] In particular, it may be provided that the return device is designed on a side of the package facing away from the air path.

[0077] The return mechanism can preferably be fixed to a housing of the device. The return mechanism can, for example, be designed in the form of a rail.

[0078] Preferably, the return device is designed and configured to bring the drop body into a position in which the new end of the strapping band, created by separating the section of the strapping band wrapped around the packaged goods, can be fed back into the fastening device, preferably the clamping device, in the drop body for the next strapping process, preferably automatically and / or manually.

[0079] It can be advantageous if the return mechanism, on a first section, particularly a lower section, transports the falling body with the attached strapping band or strap end, and / or if, on a second section, particularly an upper section, the return mechanism transports either only the falling body, i.e., without the strapping band, or the falling body with a new strap end that can be attached to it. In particular, it can be provided that the strapping band or the (original) strap end is separated or detached from the falling body between the first and second sections. From that point on, either only the falling body can be transported further by the return mechanism, or the new strap end can be attached to the falling body at that point, in particular by clamping it.It may also be possible to separate the strapping band from the falling body before it enters the return device, so that the return device transports or conveys only the falling body.

[0080] The transition between the first section and the second section of the return device is preferably located at the operator's working height, which can preferably be between 80 cm and 120 cm.

[0081] Preferably, the return device is designed as a circulating belt and / or circulating chain with at least one driver for the falling body.

[0082] This could, for example, be a toothed belt. Preferably, the return mechanism can transport the falling body from the lower arm to the upper arm, or from bottom to top, i.e., against gravity.

[0083] It may preferably be provided that the upper arm, the lower arm, the air gap and / or the return device together form an orbit for the falling body.

[0084] In particular, the upper arm can be positioned above the packaged goods, the lower arm below the packaged goods, and the air gap and return mechanism can be located on opposite sides of the packaged goods. This applies especially to the arms in their respective extended positions.

[0085] The upper arm, the lower arm, and the air gap together form the belt guide system. While the drop body moves along the air gap essentially autonomously under the influence of gravity, it is preferably provided that the drop body is carried along or moved with the upper arm when the lower arm extends or retracts, preferably by being locked onto the upper and / or lower arm by means of the upper or lower locking mechanism. If the locking mechanism is designed as a holding device, the drop body can be fixed accordingly. Thus, the drop body preferably does not move independently relative to or along the arms, but is carried along by the arms.

[0086] Together with the strap guide, the return device can create a circular path or circuit for the drop element, allowing it to be used or reused for successive strapping processes or for strapping multiple pallets, particularly without the need for manual feeding of the drop element to the newly formed end of the strap. Preferably, the direction of movement of the drop element, which further preferably corresponds to the strapping direction or circular direction of the strapping band, does not change; that is, the drop element moves in a circle on the circular path.

[0087] The direction of movement can be changed here to decouple the end of the belt from the falling body.

[0088] During its orbit, the falling body may be partially attached to the strapping band, particularly in the air section, but also possibly during the extension of the upper arm and / or the retraction of the lower arm. Conversely, particularly within the return mechanism, the falling body may also be detached from the strapping band.

[0089] It is advantageous if the lower arm is height-adjustable. This is particularly useful for varying or changing the distance of the lower arm from the ground. This makes the device adaptable to pallets with bottom boards of varying heights or with pallet gaps arranged at different levels. Adjusting the height of the lower arm may also be necessary if the pallet is placed on an elevated surface, such as another pallet, a stack of pallets, or some other raised platform.

[0090] When the lower arm is adjusted in height relative to the floor, the distance between the lower and upper arms can preferably remain constant; that is, the upper arm is preferably adjusted accordingly. A rigid connection between the lower and upper arms can be provided for this purpose. This rigid connection can optionally be implemented or supported by the return mechanism. Maintaining the distance between the arms can be advantageous for the function of the device, including, for example, the return mechanism.

[0091] It may also be intended that the upper arm is not height-adjustable.

[0092] In addition to the lower arm being height-adjustable, it may be advantageous if the upper arm is also height-adjustable independently of the lower arm and / or if the vertical distance between the exit area and the entry area is adjustable.

[0093] This allows the device to be adapted even more flexibly to the height of the packaged goods and / or the height of the pallet or the space between pallets.

[0094] The upper arm preferably has a minimum height of 2 meters to prevent the operator or other persons near the device from hitting their heads on it. Preferably, regardless of the upper arm's height, both palletized goods of relatively low height and those approximately equal to the upper arm's height can be strapped.

[0095] A particularly suitable embodiment of the invention is one in which an extension length of the upper arm and / or an extension length of the lower arm can be measured to ensure that the exit area and the inlet area are aligned at least approximately vertically to each other for the formation of the air gap.

[0096] This is particularly advantageous if the upper arm and / or the lower arm is extendable or retractable, and / or if the upper arm and / or the lower arm is designed as a telescopic arm. If this is not the case, measuring the extension length or the length of the respective arm is generally unnecessary, as the extension length or length is then constant. If the upper arm and / or the lower arm is extendable or retractable by an electric motor, the respective extension length or extension distance can preferably be measured and / or controlled by means of an encoder or coding device on the respective motor or electric motor, or on the telescopic arm itself.

[0097] As an alternative to measuring the extension length, a sensor element may be provided on the upper arm and / or the lower arm to detect whether the exit area and the inlet area are aligned at least approximately vertically to each other for the formation of the air gap.

[0098] The sensor elements on the upper and lower arms can also interact, for example, by at least one of the two sensor elements detecting the other sensor element and / or measuring the distance to the other sensor element. Optionally, a camera-monitored measuring device or an optical measuring device, such as a laser or measuring laser, can be arranged on one of the two arms, so that the laser radiation emitted by it can be detected by a sensor element on the other arm.

[0099] It has proven advantageous to have a sensor on the lower arm to detect when the lower arm emerges from below the packaged goods during extension.

[0100] This ensures, in particular, that the lower arm can catch the strapping band and the falling body when it is dropped from the upper arm.

[0101] If the maximum length is always used, a sensor can be dispensed with.

[0102] The sensor can also perform the function of detecting whether there is an obstacle in the air path or whether the air path is "clear".

[0103] The sensor could be, in particular, an ultrasonic sensor or a light barrier. However, it could also be another type of sensor.

[0104] Preferably, the lower arm can be designed and configured to be guided through a pallet gap below the packaged goods when extending.

[0105] This allows the packaged goods to be attached to the pallet in a particularly advantageous way.

[0106] For this purpose, the cross-section of the lower arm is preferably smaller than the cross-section of the pallet gap so that the arm can fit through it. The lower arm of the device is preferably positioned and / or oriented such that the lower arm is in line with the pallet gap, in particular so that the lower arm can penetrate the pallet gap when extended.

[0107] When used as intended, the sensor may in particular be designed to detect when the lower arm emerges from the pallet gap through which the lower arm is or was guided.

[0108] It can be advantageous if one end of the lower arm is angled upwards and / or downwards.

[0109] This prevents the lower arm from potentially getting caught on unevenness or interruptions in the surface over which the arm is moving, and / or on pallet wood that is in its way.

[0110] Preferably, the outlet area and / or the inlet area has a deflecting element.

[0111] The respective deflection element can be designed in particular to redirect the strapping band with the falling body from an at least approximately horizontal movement path to an at least approximately vertical movement path or vice versa.

[0112] Alternatively or additionally, the entry area can be at least partially funnel-shaped. This refers in particular to an entry area shape arranged at least predominantly in the approximately horizontal plane of the lower arm, which narrows in a funnel shape towards the lower arm or in the direction of rotation of the strapping band. A deflection element, as described above, can also be provided.

[0113] The entry area is preferably designed and configured in such a way that it is suitable for catching the falling object. In particular, the entry area should not be narrower than the falling object is wide.

[0114] The falling body can, for example, be designed as a chain segment.

[0115] The drop body can also be designed solely as a clamping device. Alternatively, it can be provided that the drop body is only a chain link or a drop weight with a clamping device for securing the end of the belt.

[0116] In a preferred embodiment of the invention, a strapping connection device is provided, which is configured to tighten the strapping band around the packaged goods and to join the band end and a section of the band together. The strapping connection device can be a hand-held device known to those skilled in the art or customary in the industry for this purpose. However, the strapping connection device can also have further and / or different features. The strapping connection device or the sealing head can preferably be connected to the device.

[0117] The strap section in question is specifically a section of the strapping band that differs from the end of the band. This strap section is designed to join the strapping band, which is wrapped around the packaged goods, to form a closed loop, thereby securing the packaged goods against slipping and / or falling off the pallet. Preferably, the strap section chosen for this purpose is one that rests on the end of the band when the strapping band forms a loop around the packaged goods.

[0118] Preferably, the strapping connection device is designed to separate the section of the strapping band wrapped around the packaged goods from the rest of the strapping band on or around the band roll after the strapping band has been tensioned and closed.

[0119] It has proven particularly suitable when the belt joining device is designed to join the belt end and the belt section together by welding.

[0120] The band joining device can be designed as a welding device.

[0121] Welding can involve, in particular, thermal welding and / or friction welding.

[0122] These designs of the strapping device are particularly suitable when the strapping band is made of thermoplastic material.

[0123] The strapping device and / or the strapping band may also be designed to connect the strap end and the strap section together by means of clamps or seals.

[0124] The tape connection device is preferably battery-operated. In particular, if a connection to the device is provided, the tape connection device can also be powered by a battery of the device according to the invention.

[0125] The belt joining device can be designed as part of the device according to the invention or constitute a part of the device according to the invention. However, the belt joining device can also be designed independently and used together with the device according to the invention. The return device can preferably be configured and designed to bring the belt end closer to the belt joining device or to transport the belt end at least to the vicinity of the belt joining device. This can be achieved in particular by ensuring that, during transport of the drop body via the return device, the belt end remains connected to or attached to the drop body at least via a, preferably lower, section of the return device.

[0126] It has proven advantageous if the upper arm, or at least the exit area of ​​the upper arm, is designed and configured to selectively release the strapping band.

[0127] Releasing or unfastening the strapping band from the upper arm serves in particular to tighten the strapping band around the packaged goods, as well as to be able to connect the end of the band with a section of the band in order to secure the packaged goods on the pallet.

[0128] "Targeted release" refers specifically to the release from the guide of the upper arm, particularly the exit area, so that the strapping band is no longer held at the level of the upper arm. This release can preferably be initiated by the strapping process and / or by the operator. If necessary, the release can be achieved, at least partially, by opening the upper locking device or, more generally, a holding device.

[0129] It may be provided that the strapping band is released by the upper arm under a specific tensile tension and / or by briefly reversing the direction of rotation of the strapping band. It may also be provided that the upper arm releases the strapping band in a controlled manner, for example, at a specific time or triggered by a signal.

[0130] When the device is used as intended for strapping palletized goods, it is preferably provided that the strapping band is guided by the upper arm until the lower arm has pulled the strapping band and the drop element under the goods, preferably as the lower arm retracts. Alternatively, it may be provided that the strapping band is guided by the upper arm until the return mechanism, if provided, has transported the drop element, preferably from the lower arm, to the working height.

[0131] Alternatively or additionally, it may be advantageous to have a lever device for lifting and / or pressing down the strapping band or the section of the band to be connected to the end of the band.

[0132] Lifting can also refer to pulling upwards, and pushing downwards can also refer to pulling downwards. When used as intended, the lever device, lever, or bracket is particularly suitable for bringing the belt end and belt section closer together and / or to a working height, so that the operator can easily grasp the belt end and belt section, overlap them, and feed them to the belt joining device to connect the belt end and belt section. Preferably, the lever device pushes or pulls the belt section downwards to approximately the operator's working height.

[0133] The lever mechanism can also be configured and designed to lift and / or push down the belt end, or a second lever mechanism can be provided for this purpose. If necessary, the lever mechanism or the second lever mechanism and the return mechanism can work together to bring the belt end and the belt section closer together and / or to the operator's working height.

[0134] Preferably, a feed device, preferably at least a pair of feed rollers, is provided to unwind or roll off the strapping band from the dispensing device or the band reel and thus fill a band storage area. Insofar as the dispensing device is referred to as a band reel within the scope of the invention, this is not to be understood restrictively. While it is preferably a band reel, it can also be any other dispensing device.

[0135] The feed device preferably consists of one or more pairs of feed rollers. However, the feed device can also be configured differently, for example, by comprising a pair of feed belts. The use of at least one pair of feed rollers has proven particularly advantageous. Below, the feed device is specified as a pair of feed rollers. However, the term "feed rollers" is to be understood as referring to any type of feed device.

[0136] It can be arranged that one of the feed rollers is located on each side of the strapping band, so that the strapping band is guided between the feed rollers, with the feed rollers movably clamping the strapping band between them for transport. For transport, the feed rollers can, in particular, rotate in opposite directions.

[0137] The strapping reservoir eliminates the need for rapid acceleration of the strapping reel to begin a strapping process. The reservoir allows the strapping reel to rotate relatively smoothly and at a constant speed, enabling the strapping reel to unwind the required length of strapping. For strapping, the necessary length of strapping can then be quickly and easily drawn or fed from the reservoir without requiring acceleration of the strapping reel. The reservoir is preferably formed by a space within the device through which the strapping is guided. When the reservoir is full, it contains an excess of strapping, or loose strapping.

[0138] The feed rollers can also unwind strapping tape from the tape roll independently of the tape storage unit to make it available for the tape guiding device.

[0139] It may be provided that the feed rollers, with or without a belt storage unit, unwind the strapping band from the belt roll at a speed that corresponds at least approximately to the speed at which the front end of the strapping band or the end of the band is moved downwards along the vertical air path by gravity using the drop body.

[0140] The feed rollers reduce the resistance caused by the band roller when the strapping band unwinds, which can unintentionally slow down the strapping band, especially in the air gap.

[0141] It has proven advantageous if the feed rollers are motorized or have a motor, preferably an electric motor.

[0142] Alternatively or preferably additionally, a control device, preferably at least a pair of control rollers, can be provided to guide the strapping band in a controlled manner into the upper arm of the strapping guide device and / or to pull the strapping band from the upper arm back into the strap storage.

[0143] The control device preferably consists of one or more pairs of control rollers. However, the control device can also be configured differently, for example, by comprising a pair of control bands. The use of at least one pair of control rollers has proven to be particularly advantageous. Below, the control device is specified as a pair of control rollers. However, the term "control rollers" is to be understood as referring to any type of control device.

[0144] It can be provided, in particular, that a guide roller is located on each side of the strapping band, so that the strapping band is guided between the guide rollers, the guide rollers movably clamping the strapping band between them for transport. For transport, the guide rollers can, in particular, rotate in opposite directions, especially in both directions depending on the desired transport direction of the strapping band.

[0145] The control rollers can be arranged, preferably behind the feed rollers and / or behind the strapping buffer, when viewed in the unwinding direction of the strapping roll or in the rotation direction of the strapping band. Furthermore, the control rollers can be arranged, preferably in front of the upper arm, when viewed in the rotation direction of the strapping band.

[0146] The control rollers are preferably designed and configured to brake and / or advance the strapping band, particularly when the falling body pulls or guides the strapping band across the air path. It can also be provided that the control rollers release the strapping band as the falling body descends, i.e., release the clamping mechanism to allow an unbraked or controlled free fall.

[0147] It is preferable to ensure that the rotation of the control rollers is synchronized with the falling speed of the strapping band and the falling body across the air path. This can be achieved through prior calculation and / or measurement during the fall.

[0148] It has proven particularly advantageous for the guide rollers to advance the strapping in the direction of travel by precisely the length by which the upper arm extends and by which the front end of the strap is preferably pulled along during extension. For this purpose, strapping is taken from the strapping reservoir, at least partially emptying it. When the strapping, with the dropper preferably attached to the front end, is then released from the exit area of ​​the upper arm and falls over the air gap, the guide rollers can preferably advance the strapping from the reservoir according to the falling speed. As soon as the strap end reaches the entry area of ​​the lower arm, the dropper preferably engages with the lower arm, so that the strapping is pulled along when the lower arm retracts.When the lower arm is retracted, the control rollers preferably push exactly the length of strapping band from the band storage in the direction of rotation by which the lower arm is retracted.

[0149] The speed of movement of the control rollers can be variable depending on the respective stage of the strapping process and is preferably adapted to the extension speed of the upper arm, the falling speed of the strapping band with the falling body on the air path or to the retraction speed of the lower arm.

[0150] The actual falling speed can preferably be regulated or controlled by means of the control rollers. For example, it can be advantageous to slow the falling body shortly before it impacts the entry point of the lower arm, especially if the fall height is relatively high or the air distance is relatively long. Slowing the falling body may also be necessary for safety reasons.

[0151] The control rollers are preferably also designed and configured to retract the strapping band from the upper arm in the direction of the band reel or against the actual direction of rotation of the strapping band, thereby filling the band storage. This can be used to prepare the device for another strapping operation after the completion of a previous one, or to return the device to its initial state.

[0152] Preferably, the control device may have a motor, or the control rollers may have a motor, which can be operated both forwards and backwards.

[0153] This makes it possible to select or adjust the conveying direction of the control device, so that it is not only possible to take strapping band from the band storage and feed this strapping band to the band guiding device, but it is also possible to convey excess dispensed strapping band back into the band storage or generally to move the strapping band against the direction of circulation.

[0154] The motor(s) of the control rollers are preferably designed as electric motors.

[0155] Both the feed mechanism (feed rollers) and the control mechanism (control rollers) can each be considered a drive unit. However, the drive units, especially the control mechanism, can also have a braking effect, for example to limit the falling speed.

[0156] It is advantageous if the belt storage unit is located between the feed device and the control device.

[0157] In other words, it is preferably provided that one of the drive units, in particular the feed unit, is arranged in front of the belt storage unit and the other drive unit, in particular the control unit, is arranged behind the belt storage unit. It can be provided, in particular, that the belt storage unit is bounded on one side by the feed rollers and on the other side by the control rollers.

[0158] Preferably, the strapping storage unit is arranged in front of the upper arm when viewed in the direction of rotation of the strapping band. Accordingly, the feed device or feed rollers and the control device or control rollers are also preferably arranged in front of the upper arm when viewed in the direction of rotation of the strapping band.

[0159] The feed rollers on the side of the strapping storage unit, where the dispensing device or the strapping roll is also located, preferably unwind strapping from the roll at a uniform or constant speed, thus sufficiently filling or refilling the strapping storage unit so that the control rollers on the other side of the strapping storage unit can always draw the required length of strapping from the strapping storage unit into the strapping guide device.

[0160] The upper locking device described above, which can also generally be a holding device, can also serve to prevent the drop body from falling out of the upper arm prematurely, i.e., when the drop body is not yet to be released into the air path and / or when the upper arm is not yet fully extended. However, this can also be prevented by the control device, which, during the extension of the upper arm, preferably releases or feeds into the strapping guide only as much strapping as is necessary for extending the upper arm. In this way, the drop body can be held at the level of the upper arm.

[0161] In a preferred embodiment, the device is mobile, and preferably has wheels and / or an accumulator.

[0162] In other words, the device is preferably designed as a mobile device, such that the device is mobile or movable.

[0163] The wheels or casters can be used, in particular, to move the device, for example to a new location. Preferably, four wheels are provided, with at least two of the wheels preferably being designed as swivel casters.

[0164] The wheels should preferably be lockable and / or lockable.

[0165] The accumulator can serve, in particular, to supply power to the device, i.e., for example, to provide the necessary energy to operate the motors or electric motors, sensor elements, and / or the sensor. The accumulator allows for wireless power supply, making the device portable.

[0166] The accumulator can also be used to power the wheels or rollers of the device in order to move the device.

[0167] Preferably, a control device is provided for controlling and / or monitoring the strapping process.

[0168] The control device is preferably designed and configured to read the sensors, to control the upper arm, the lower arm, the feed rollers and / or the control rollers, to monitor or control the belt storage and / or to control any safety systems that may be present, for example, to protect against impacts.

[0169] The control device is preferably communicatively connected to the aforementioned elements of the device that are controlled, monitored, or actuated. This communication can optionally be wireless. The control device and the aforementioned elements can also be electrically connected. The invention further relates to a method for strapping palletized goods with a strapping band, wherein, according to the invention, at least the following steps are provided:

[0170] (a) the strapping band is pulled at least approximately horizontally over the packaged goods, after which

[0171] (b) the strapping band is dropped laterally past the packaged goods over an at least approximately vertical air path by gravity, after which

[0172] (c) the strapping band is pulled at least approximately horizontally under the packaged goods, in particular through a pallet gap, and according to which

[0173] (d) the strapping band is stretched tightly around the packaged goods, and one end of the strapping band and one section of the strapping band are joined together.

[0174] The method according to the invention can be implemented independently of the device according to the invention. However, the method according to the invention can be carried out particularly advantageously using a device according to the invention, in particular a device according to the preceding description.

[0175] The advantages of the method according to the invention arise analogously from the advantages of the device according to the invention. Furthermore, variants and embodiments of the method result, among other things, from the preceding description of the device and its embodiments or further developments.

[0176] The aforementioned process steps can preferably be carried out in the stated order. Additional steps or intermediate steps may be included as needed.

[0177] It has proven particularly suitable if the strapping band is pulled over the packaged goods in step (a) by means of an extendable or retractable upper arm of a strapping guide device and / or under the packaged goods in step (c) by means of an extendable or retractable lower arm of a strapping guide device.

[0178] The strapping band can be pulled along by the extension of the upper arm and / or the retraction of the lower arm. Alternatively, the strapping band can be pulled by a separate mechanism, possibly even when the arms are already extended.

[0179] It may be provided in particular that the upper arm is extended for step (a) or is extended during step (a).

[0180] For the transition from step (a) to step (b) and again to step (c), it is preferably provided that an end region of the upper arm and an end region of the lower arm are aligned one above the other, the two end regions forming the air gap between them, and the vertical distance between the end regions defining the length of the air gap. The lower arm should be extended in this case.

[0181] Furthermore, it is preferably provided that the upper arm remains extended at least until the strapping band has overcome the air gap after step (b) and has been caught by the extended lower arm. During or after step (c), the lower arm can be retracted.

[0182] In step (b), the strapping band should fall at least approximately vertically downwards, primarily or largely driven by gravity, i.e., by the acting force of weight or gravity. However, other forces may also act, even unintentionally. For example, a possible deflection by wind or other air currents cannot be ruled out.

[0183] It is advantageous if the strapping band is weighted at its end, especially for step (b), by a falling weight which is caught at the end of the air gap or before step (c).

[0184] The end of the at least approximately vertical air path is naturally located at the bottom and is to be understood in the direction of fall.

[0185] It is preferably provided that the strapping band in step (c) is pulled through one of the pallet gaps of the pallet on which the packaged goods are located.

[0186] Furthermore, it can be provided that the strapping band is preferably deflected from the at least approximately vertical air path or fall path into an at least approximately horizontal direction when catching the optional falling body.

[0187] During or after the lower arm (optional to the process) catches the falling body, it preferably locks onto the lower arm. This can be assisted by the residual momentum of the fall and / or magnetically. Additionally, the lower arm can be designed to carry the strapping band along with the falling body during retraction, by having the falling body locked onto the lower arm.

[0188] Connecting the end of the strap and the section of strap in step (d) serves in particular to form a closed loop or sling around the packaged goods with the strapping band, which secures the packaged goods on the pallet.

[0189] Preferably, the strap end and the strap section are joined in step (d) by welding. To be able to join the strapping band into a closed loop by welding or heating, it is advantageous to use a strapping band made of thermoplastic material.

[0190] The described embodiments and further developments of the invention can be combined with each other as desired.

[0191] Features described in connection with one of the two subject matters of the invention, i.e., the device or the method for strapping palletized goods, can also be advantageously implemented for the other subject matter of the invention. Likewise, advantages mentioned in connection with one subject matter of the invention can also be understood as relating to the other subject matter of the invention.

[0192] It should also be noted that terms such as "comprehensive," "exhibiting," or "with" do not exclude other characteristics or steps. Furthermore, terms such as "a" or "the," which indicate a singular number of steps or characteristics, do not exclude a plurality of characteristics or steps—and vice versa.

[0193] In a purist embodiment of the invention, however, it may also be provided that the features introduced in the invention with the terms "comprising," "comprising," or "with" are exhaustively listed. Accordingly, one or more lists of features within the scope of the invention may be considered complete, for example, for each claim. The invention may, for instance, consist exclusively of the features mentioned in claim 1.

[0194] It should be noted that designations such as "first" or "second" etc. are primarily used for the purpose of distinguishing between the respective device or process features and are not necessarily intended to indicate that features are mutually dependent or related to each other.

[0195] An embodiment of the invention is described in more detail below with reference to the drawing.

[0196] The figures show a preferred embodiment in which individual features of the present invention are shown in combination. Features of the embodiment can also be implemented independently of the other features of the embodiment.

[0197] In the figures, functionally identical elements are provided with the same reference symbols.

[0198] The figures represent the invention only as an example and in a highly schematic way.

[0199] Figure 1 shows a schematic view of an embodiment of the device according to the invention in section from the side at the beginning of a strapping process, wherein the device is in a retracted state (basic position);

[0200] Figure 1 A shows a schematic view along line AA of Figure 1 in section from above;

[0201] Figure 2 shows a schematic view according to Figure 1 after the strapping band has been applied halfway around the packaged goods, with the device in an extended state;

[0202] Figure 3 shows a general view according to Figure 1 after the packaged goods have been almost completely encircled with the strapping band;

[0203] Figure 4 shows a schematic view based on Figure 1 during the closing of the strapping band to secure the packaged goods; and

[0204] Figure 5 shows a schematic view of a further embodiment of the device according to the invention in section from the side, wherein the device is in an extended state.

[0205] Figure 1 shows an embodiment of a device 1 according to the invention for strapping palletized goods 2, i.e., any goods, merchandise, and / or building materials on any pallet 12, comprising at least a dispensing device 3, preferably designed as a strapping roll 3, for providing a strapping band 4, and a strapping guide 5 for strapping the goods 2 with the strapping band 4, shown in a side section. The device 1 is shown in particular in its state at the beginning of a strapping operation or process. Figures 2 to 4, which will be referred to below, show further views of this embodiment of the device 1 according to the invention at other times during an exemplary strapping operation. First, the invention will be described in more detail with reference to Figure 1.

[0206] According to the invention, the strapping guide 5 has at least one upper arm 6 and one lower arm 7 for guiding the strapping band 4. The upper arm 6 has an exit area 6a for exiting a band end 4a of the strapping band 4, and the lower arm 7 has an entry area 7a for inserting the band end 4a. Between the exit area 6a and the entry area 7a, the strapping guide 5 has an approximately vertical air gap 8. It is further provided that a drop element 9 of the strapping guide 5 is detachably attached to the strapping band 4, or, in particular, is attached to the strapping band 4 for guiding it over the air gap 8, so that the strapping band 4, together with the drop element 9, can be fed by gravity along the air gap 8 to the entry area 7a of the lower arm 7.

[0207] The device 1 according to the invention allows the packaged goods 2 to be secured on the pallet 12 in a particularly advantageous manner.

[0208] In this embodiment, the output device 3 is designed as a tape reel 3 and will be referred to as such in the following. However, this is not to be understood as a limitation. Analogously, it could also be an output device designed in a different way.

[0209] The strapping device 5, in particular the upper arm 6 and / or the lower arm 7, can be designed in particular to pull the strapping band 4 at least partially around the packaged goods 2.

[0210] For a representation of the air distance 8 over which the strapping band 4 is pulled by the force of gravity, supported by the weight of the falling body 9, reference is made to Figure 2 described below.

[0211] It is preferably provided that the drop element 9 can be detachably attached to the end 4a of the strapping band 4. For this purpose, the drop element 9 preferably has a fastening device, and more preferably a clamping device. If the drop element 9 is attached to the end 4a of the strapping band, the exit area 6a is preferably designed and configured to guide the end 4a of the strapping band with the attached drop element 9. Likewise, in this case, the entry area 7a is preferably designed and configured to guide the end 4a of the strapping band with the attached drop element 9, in particular to catch the drop element 9.

[0212] To simplify the illustration, the strapping band 4 is guided in the illustrated embodiments such that it is guided along the outside of the upper arm 6 and / or the lower arm 7, although not all guide elements preferably provided for such a support, such as deflection rollers, are shown in the figures. Preferably, the strapping band 4 may be guided through the upper arm 6 and / or lower arm 7, for example through an internal channel.

[0213] Preferably, the upper arm 6 and / or the lower arm 7 is self-supporting. It has also proven advantageous if the upper arm 6 and / or the lower arm 7 is extendable and retractable, respectively, and preferably the upper arm 6 and / or the lower arm 7 is designed as a telescopic arm.

[0214] The retracted state of the arms 6, 7 is shown by way of example in Figure 1. For a further, more general view of the embodiment according to Figure 1 with the arms 6, 7 in an extended state, reference is made to Figure 2, in which Figure 2 shows the state after approximately half a rotation of the packaged goods 2 with the strapping band 4, and in which the falling body 9 is located on the air path 8 and pulls the strapping band 4 behind it.

[0215] In an advantageous embodiment of the device 1, the falling body 9 can be engaged or disengaged from an upper locking device 6b of the upper arm 6 and / or from a lower locking device 7b of the lower arm 7. The locking devices 6b, 7b can also be retaining devices, e.g., locking devices or drive devices. The exemplary embodiment is to be understood accordingly. The locking devices 6b, 7b fall under the general term "retaining devices".

[0216] The upper locking device 6b preferably comprises a spring-loaded latching mechanism and / or a magnetic latch for the drop body 9. The lower locking device 7b preferably comprises a return latch and / or a one-way clamp for the drop body 9. Preferably, after passing through the air gap 8 or upon impact with the entry area 7a of the lower arm 7, the drop body 9 automatically engages with, or is held or locked in place by, the lower locking device 7b.

[0217] It has proven particularly advantageous to provide a return device 10 for returning the drop body 9 from the lower arm 7 towards the upper arm 6, preferably running parallel to the air gap 8 as shown by way of example in Figure 2. The return device 10 can, for example, be designed as a circulating belt and / or circulating chain with at least one carrier 10a for the drop body 9. It is preferably provided that the return device 10 can transport the drop body 9 in the direction from the lower arm 7 to the upper arm 6. This is shown in Figure 3, where the strapping process is depicted at a point in time when the strapping band 4 has almost completely encircled the packaged goods 2.

[0218] It can be advantageous if the return device 10 transports the drop body 9 with the strapping band 4 or band end 4a attached to it on a first section, particularly a lower section, of the return device 10 (see Figure 3) and / or if the return device 10 transports the drop body 9 with a new band end 4a' that can be attached to it on a second section, particularly an upper section, of the return device 10 (see Figure 4). In particular, it can be provided that the strapping band 4 or the (original) band end 4a of the strapping band 4 is separated from the drop body 9 between the first and second sections of the return device 10. At this point, the new band end 4a' can then be attached to the drop body 9, in particular clamped in place.

[0219] After the (original) strap end 4a has been detached from the drop body 9, for example, when the drop body 9 is located between the first and second sections of the return device 10 described above and preferably at working height, this strap end 4a can be connected, preferably welded, to another strap section of the strapping band 4 by means of a strap joining device 13 described below, so that the strapping band 4 forms a tight loop around the packaged goods 2. To detach the strapping band 4 from the drop body 9, it is preferably provided that the drop body 9 is briefly transported backwards or against its actual direction of rotation, preferably by means of the return device 10 or the control rollers 17 described below, in order to trigger a retaining mechanism of the fastening device or clamping device of the drop body 9, so that the strapping band 4 is released.Alternatively, the strapping band 4 can also be manually detached from the drop body 9.

[0220] The closing of the strapping band 4 for securing the packaged goods 2 is shown schematically in Figure 4. When the section of the strapping band 4 wrapped around the packaged goods 2 is separated, in particular cut, from the remaining strapping band 4 connected to the band roll 3, a new band end 4a' is created, which can be used for a further strapping process. When using the embodiment of the device according to the invention shown in Figures 1 to 4 as intended, the new band end 4a' is attached to the drop body 9 immediately, i.e., before the drop body 9 is transported further by the return device 10. In Figure 4, the cut on the strapping band 4 where the new band end 4a' is created is marked with a short dashed line. The band section intended for connection lies, viewed in the direction of travel, directly in front of the new band end 4a'.Furthermore, arrows indicate that the section of strap intended for connection with the (original) strap end 4a is brought to the (original) strap end 4a for sealing on the now loose part of the strapping band 4, which is wrapped around the packaged goods 2. Then, using the sealing device 13, the strap 4 is tensioned around the packaged goods 2, welded, and cut. This creates the new strap.

[0221] The end of the strap 4a is then fed to the drop body 9. This completes the strapping of the packaged goods 2 and makes the device 1 ready for another strapping process.

[0222] When the device 1 is used as intended for strapping palletized goods 2, it is preferably provided that the strapping band 4 is guided by the upper arm 6 until the lower arm 7 has pulled the strapping band 4 with the drop element 9 under the goods 2, preferably during the retraction of the lower arm 7, and preferably also that the return mechanism 10, if provided, has transported the drop element 9 from the lower arm 7 to the working height. Between the snapshots of the strapping process shown in Figures 3 and 4, it is therefore preferably provided that the lower arm 7 retracts while the upper arm 6 is still fully extended. However, the sequence of retraction of the arms 6 and 7 can also be chosen differently; for example, the upper arm 6 and the lower arm 7 can retract simultaneously.

[0223] It should be noted that the strapping band 4 wrapped around the packaged item 2 in Figure 4 is shown at a certain distance from the packaged item 2 for illustrative purposes. This serves only to make the respective lines easier to distinguish. It is preferably intended that the strapping band 4 is stretched tightly around the packaged item 2 to secure it to the pallet 12 and, in particular, to prevent the packaged item 2 from slipping and / or falling off the pallet 12. The same applies analogously to the sections of the strapping band 4 already guided along the packaged item 2 at the depicted point in the strapping process shown in Figure 3.

[0224] Preferably, the upper arm 6, the lower arm 7, the air gap 8 and / or the return device 10 together form an orbit for the falling body 9. The falling body 9 can preferably move in a circle on this orbit without changing direction.

[0225] To adapt to different types of palletized goods 2, in particular to the floor height or the height of the pallet gaps 12a and / or the base timbers of the pallet 12, the lower arm 7 can preferably be height-adjustable.

[0226] To ensure that the outlet area 6a and the inlet area 7a are aligned at least approximately vertically to each other for the formation of the air gap 8, preferably an extension length of the upper arm 6 and / or an extension length of the lower arm 7 can be measured.

[0227] If the upper arm 6 and / or the lower arm 7 can be extended or retracted by an electric motor, the respective extension length or extension distance can preferably be measured and / or controlled by means of an encoder or a coding device on the respective motor or electric motor.

[0228] Alternatively, a sensor element 11a can be provided on the upper arm 6 and / or the lower arm 7 to detect whether the exit area 6a and the inlet area 7a are aligned at least approximately vertically to each other to form the air gap 8.

[0229] Preferably, a sensor 11b can be provided on the lower arm 7 to detect when the lower arm 7 extends below the packaged goods 2 and / or to detect whether there is an obstruction in the air path 8. This is particularly suitable if the lower arm 7 is designed and configured to be guided through a pallet gap 12a below the packaged goods 2 when extended. It can be advantageous if one end of the lower arm 7 is beveled upwards and / or downwards. The drawing shows an example of how the lower arm 7 can be beveled downwards or have a chamfer at its front end.

[0230] The outlet area 6a and / or the inlet area 7a preferably has a deflecting element or a deflecting area.

[0231] For a particularly advantageous catching of the strapping band 4 or the falling body 9 at the end of the air gap 8, the inlet area 7a of the lower arm 7 can also preferably be at least partially funnel-shaped (viewed from above or in a top view). This is not shown in the drawing.

[0232] The falling body 9 can, for example, be designed as a chain segment, as indicated in the drawing. It is advantageous to provide a strapping connection device 13, which is designed to tighten the strapping band 4 around the packaged goods 2 and to connect the band end 4a and a section of the band. The strapping connection device 13 is shown schematically and with dashed lines in Figure 1. The strapping connection device 13 can be a conventional hand-held device or welding tool, which is separate from the device 1. However, the strapping connection device 13 can also be connected to the device 1 or be part of the device 1.

[0233] Preferably, the strap joining device 13 is also designed to separate the section of the strapping band 4 wrapped around the packaged goods 2 or the closed loop formed by joining the band end 4a and the band section from the remaining strapping band 4 on or at the band roll 3.

[0234] According to a preferred embodiment, the strap joining device 13 is configured to join the strap end 4a and the strap section together by welding or heating. For this purpose, the strapping band 4 can be made of thermoplastic material.

[0235] To connect the (original) end 4a of the strapping band to the other section of the strapping band 4, the strapping band 4 must be released from the guide of the upper arm 6, in particular the guide at the exit area 6a. This corresponds approximately to the point in the strapping process shown in Figure 3. It has proven advantageous if the upper arm 6, or at least the exit area 6a of the upper arm 6, is designed and configured to release the strapping band 4 in a controlled manner.

[0236] To release the strapping band 4 from the guide of the upper arm 6, the upper arm 6 can be configured to release the strapping band 4, for example, under a specific tensile tension and / or by briefly reversing the direction of rotation of the strapping band. This is particularly useful when the strapping band 4 is initially guided in a channel in the upper arm 6, which preferably has an elongated opening at the bottom, which may optionally be loosely closed with a rubber lip. The tensile tension can optionally be applied by the control rollers 17 described below. Alternatively, the guide mechanism of the upper arm 6 can be configured to release the strapping band 4 in a controlled manner, for example, at a specific time or triggered by a signal, so that the strapping band 4 is ejected from the upper arm 6.If necessary, the release can be achieved at least partially by opening the upper locking device 6b.

[0237] It can be advantageous if, alternatively or additionally, a lever device 14 is provided for lifting and / or pressing down the strapping band 4 or the band section to be connected to the strap end 4a. This is shown by way of example in Figure 1. However, it should be noted that the lever device 14 can be designed in any way, provided it is suitable for lifting and / or pressing down the strapping band 4 or the band section. Preferably, the lever device 14 can make it easier for the operator to bring the strap end 4a and the band section closer together in order to insert them together into the strap connection device 13, so that by connecting them a closed loop can be formed from the strapping band 4 around the packaged goods 2 to secure the packaged goods 2 on the pallet 12.

[0238] Preferably a feed device with preferably at least one pair of feed rollers 15 is provided to unwind or roll off the strapping band 4 from the dispensing device or band roll 3 and thus fill a band storage 16.

[0239] In this exemplary embodiment, the feed device is designed as a pair of feed rollers 15. However, this is not to be understood as a limitation. It could just as easily be a differently designed feed device.

[0240] In the strap storage 16 there is preferably an excess of strapping band 4 or loose strapping band 4, which can be arranged loosely, for example in a serpentine or meandering manner, in the strap storage 16, as is shown by way of example in Figure 1, as well as in Figures 2 to 4.

[0241] It can be advantageous to have a control device, preferably at least a pair of control rollers 17, to guide the strapping band 4 in a controlled manner into the upper arm 6 of the strapping guide 5 and / or to pull the strapping band 4 back from the upper arm 6 into the strap storage unit 16 against the direction of rotation. The control device or the control rollers 17 preferably have a motor that can be operated both forwards and backwards. The motor is not shown in the drawing.

[0242] In this exemplary embodiment, the control device is designed as a pair of control rollers 17. However, this is not to be understood as a limitation. It could just as easily be a differently designed control device.

[0243] It has proven particularly suitable to arrange the strap storage unit 16 between the feed unit 15 and the control unit 17. For this purpose, the strap storage unit 16 can be limited on one side by the feed unit or the feed rollers 15 and on the other side by the control unit or the control rollers 17. Furthermore, it can be advantageous if the strap storage unit 16, as well as the feed rollers 15 and the control rollers 17, are arranged in front of the upper arm 6 when viewed in the direction of rotation of the strapping band 4. If necessary, the strapping band 4 can be guided from the strap storage unit 16 to the strap guide 5 and / or the return unit 10 through a channel nozzle or channel 21. Figure 5, described below, shows an alternative arrangement of the strap storage unit 16 compared to Figures 1 to 4. However, these two examples are not to be understood as limiting; the strap storage unit 16 can also be arranged differently.The direction of the strapping or direction of rotation of the strapping band 4 around the packaged goods 2 is symbolized by the arrow “X” in Figure 2 and the following figures. The strapping band 4 is preferably first guided along the top of the packaged goods 2, then pulled downwards through the drop body 9 and finally guided back under the packaged goods 2 through the pallet gap 12a.

[0244] The strapping storage unit 16 can essentially be formed by a free space in the device 1 through which the strapping band 4 is guided. To fill the strapping storage unit 16, strapping band 4 can preferably be unwound from the band reel 3 and / or strapping band 4 can be retracted from the band guide 5, in particular from the upper arm 6. An excess of strapping band 4, or loose strapping band 4, is arranged in the filled strapping storage unit 16, which, if required, can be drawn from the strapping storage unit 16 into the band guide 5, particularly with low resistance and high speed, for example, when the falling object 9 falls over the air gap 8, so that the falling object 9 is not slowed down by the resistance of the band reel 3.

[0245] The strapping storage 16 preferably has a volume or is preferably filled with an excess of strapping band 4 or loose strapping band 4 such that at least such a length of strapping band 4 is in the strapping storage 16 as is necessary to overcome at least 50% of the air gap 8, preferably 100% of the air gap 8.

[0246] The tape storage unit 16 can be located at any point in the device.

[0247] It has proven particularly suitable for the control rollers 17 to advance the strapping band 4 in the direction of rotation by precisely the length by which the upper arm 6 is extended and by which the front end of the band 4a is preferably pulled along during extension. For this purpose, the strapping band 4 is preferably taken from the band storage 16, and the latter is at least partially emptied. When the strapping band 4, with the drop element 9 preferably attached to the front end 4a of the band, is then released from the exit area 6a of the upper arm 6 and falls over the air gap 8, it can preferably be provided that the control rollers 17 advance the strapping band 4 from the band storage 16 according to the falling speed. As soon as the end of the band 16 has reached the entry area 7a of the lower arm 7, the drop element 9 preferably engages with the lower arm 7 or is held there.The lower arm 7 is locked in place so that the strapping band 4 is pulled along when the lower arm 7 is retracted. When the lower arm 7 is retracted, the control rollers 17 preferably push forward exactly the length of strapping band 4 in the direction of rotation, preferably from the band storage 16, by which the lower arm 7 is retracted.

[0248] The feed rollers 15 on the side of the strapping storage unit 16, on which the dispensing device or the strapping roll 3 is also located, preferably unwind strapping band 4 from the strapping roll 3 at a uniform or constant speed, thus sufficiently filling or refilling the strapping storage unit 16 so that the control rollers 17 on the other side of the strapping storage unit 16 can always draw the required length of strapping band 4 from the strapping storage unit 16 into the strapping guide 5. The speed of movement of the control rollers 17 can be variable depending on the respective stage of the strapping process and is preferably adapted to the extension speed of the upper arm 6, the falling speed of the strapping band 4 with the drop body 9 on the air path 8, or the retraction speed of the lower arm 7.

[0249] Premature falling of the falling body 9 from the exit area 6a can be prevented by the upper locking device 6b and / or by means of the control device 17, which preferably releases or pushes into the strapping device 5 only as much strapping band 4 as is necessary to extend the upper arm 6 during the extension of the upper arm 6.

[0250] In a preferred embodiment, the device 1 is mobile, wherein the device 1 may preferably have wheels 18 and / or an accumulator 19.

[0251] It can be advantageous to have a control device 20 for controlling and / or monitoring the strapping process. This is only shown schematically in the drawing.

[0252] Figure 1A shows a schematic view along line AA of Figure 1 in a top-down section. This shows, in particular, how the device 1 is preferably positioned in the horizontal plane relative to the pallet 12 with the pallet gap 12a and the packaged goods 2 arranged or palletized on the pallet 12, namely such that the pallet gap 12a is an extension of the lower arm 7. Not all components of the device 1 are clearly visible in Figure 1A and are therefore not labeled. For further information, please refer to Figure 1.

[0253] Figure 1 and Figure 2 differ essentially in that the upper arm 6 and the lower arm 7 are retracted in Figure 1, while both arms 6 and 7 are extended in Figure 2. The aspects not described in detail with respect to Figure 2 are analogous to those of Figure 1. Likewise, the aspects not described in detail with respect to Figures 3 and 4 are analogous to those of Figure 1.

[0254] Figure 2 shows how the device 1 is preferably set and aligned when used as intended, namely such that the upper arm 6, in its extended position, projects above the packaged goods 2 and the lower arm 7, in its extended position, projects below the packaged goods 2, with the lower arm 7 being located, in particular, at the level of the pallet gap 12a. Furthermore, the discharge area 6a and the inlet area 7a are preferably arranged on a vertical line. In other words, the discharge area 6a should be located vertically above the inlet area 7a.

[0255] To close the strapping band 4, in addition to the band section intended for joining, the band end 4a must also be fed to the band joining device 13. This can be done in various ways, for example using the return device 10, the lever device 14 and / or a second (not shown) lever device.

[0256] Preferably, the return device 10 is configured and designed to bring or transport the belt end 4a to a working height, generally approximately 80 cm to 120 cm, and preferably at least close to the belt section, so that the operator can grasp the belt end 4a and the belt section as easily as possible and insert them into the belt connecting device 13. This can be achieved in particular by ensuring that the belt end 4a remains connected to or attached to the dropping body 9 via at least one, preferably lower, section of the return device 10 during transport of the dropping body 9. This has already been described in more detail above.

[0257] In addition to its preferred function of lifting or pulling up and / or pushing down or pulling down the section of the belt to be connected to the belt end 4a, the lever device 14 can also be configured and designed to lift or pull up and / or push down or pull down the belt end 4a. Alternatively, a second lever device can be provided for lifting and / or pushing down the belt end 4a, analogous to the (first) lever device 14.

[0258] If necessary, the (first) lever assembly 14 or the second lever assembly and the return mechanism 10 can work together to bring the belt end 4a and the belt section as close together as possible, enabling the operator to grasp the belt end 4a and the belt section and feed them to the belt joining device 13. Alternatively, the belt end 4a can be guided towards the belt section by another mechanism. In the simplest case, this can be done manually, i.e., by the user or operator.

[0259] Figure 5 shows a further embodiment of the device 1 according to the invention in a side section, with the device 1 being in an extended state, similar to Figure 2. Aspects not described in detail before and / or after Figure 5 are analogous to those in Figures 1 to 4. A significant difference between the embodiment according to Figure 5 and the embodiment according to Figures 1 to 4 lies in the arrangement of the strap storage unit 16, which in Figure 5 is not located at a mid-level or working height, but rather higher up. With such an arrangement, the strapping band 4 does not need to be transported upwards from its exit point from the strap storage unit 16 to the upper arm 6, for example by means of the return device 10, as shown in Figure 1.Instead, it is preferably provided that the strapping band 4 is fed directly to the upper arm 6, with the control rollers 17 preferably arranged immediately in front of the upper arm 6 when viewed in the direction of rotation.

[0260] Figure 5 shows, in addition to the components of the device 1 already described above, an optional platform 22 which can prevent the falling body 9 from falling when the falling body 9 is not yet attached to the strapping band 4 by covering or closing the exit area 6a of the upper arm 6 when it is retracted. This can be particularly advantageous if the upper locking device 6b is not suitable, at least not on its own, for holding the falling body 9.

[0261] Furthermore, Figure 5 shows, in principle, how the strapping band 4 would approximately run after the upper arm 6 retracts, indicated by a dashed line and the reference numeral 4'. Preferably, the upper arm 6 remains extended at least until the strapping band 4, together with the drop element 9, has overcome the air gap 8 and has been caught by the extended lower arm 7. Preferably, the drop element 9 engages with the lower arm 7, in particular with the lower locking device 7b. When the upper arm 6 then retracts, the strapping band 4 wraps itself obliquely around the packaged goods 2 from above, specifically around the upper right edge of the packaged goods 2, as indicated by the dashed line with the reference numeral 4' in Figure 5.

[0262] An analogous path for the strapping band 4, as represented by the reference numeral 4', can also be achieved by the upper arm 6 releasing the strapping band 4, for example, under a specific tensile stress. This is particularly useful when the strapping band 4 is initially guided in a channel within the upper arm 6, which has an elongated opening at its downwards, optionally loosely closed with a rubber lip. It can also be provided that the guiding mechanism of the upper arm 6 releases the strapping band 4 in a controlled manner, for example, at a specific time or triggered by a signal, so that the strapping band 4 is ejected from the upper arm 6.

[0263] Provided that the strapping band 4 is routed as shown in Figure 5 with the dashed line or reference numeral 4', a section of the strapping band 4, or the section of the band to be joined to the band end 4a, can be particularly advantageously engaged by the lever device 14, for example, to push down or pull down the band section, and in particular to feed the band section to the band joining device 13 or to bring it close to it. This simplifies the process for the operator to lay the band end 4a and the band section on top of each other in order to join them using the band joining device 13. The lever device 14 can also be used analogously with the strapping band 4 route shown in Figure 3.

[0264] The lever device 14 is optional in the exemplary embodiments, but can be advantageous.

[0265] The arrows on arms 6 and 7 in Figures 1, 2, and 5 serve only to illustrate the operation of the device 1, particularly at the respective point in time shown during a strapping process, and their direction is not to be interpreted exclusively. For example, it is preferably provided that the upper arm 6 and / or the lower arm 7 are each extendable and retractable. Furthermore, Figures 2 and 5 each show several drop elements 9, each symbolizing different points in time during a strapping process and also serving only to illustrate the operation of the device 1. The device 1 preferably has only one drop element 9. The drop element 9 is preferably attachable to, or attached to, the end 4a of the strapping band 4, in particular by clamping it.When strapping palletized goods 2 using the device 1, the drop body 9 moves around the goods 2 when used as intended and is therefore located in different positions in the belt guide device 13 and / or the return device 10, depending on the time.

[0266] The drop body 9 does not need to be attached to the strapping band 4 at all times; however, the drop body 9 is preferably attached, particularly on the air gap 8, to the strapping band 4 or the band end 4a to support the gravity-driven guidance of the strapping band 4.

[0267] The described embodiments of the invention can be combined with each other as desired.

[0268] Figures 1 to 5 described above also serve to disclose a method according to the invention for strapping palletized goods 2 with a strapping band 4. At least the following steps are provided:

[0269] (a) the strapping band 4 is pulled at least approximately horizontally over the packaged goods 2, after which

[0270] (b) the strapping band 4 is dropped laterally past the packaged goods 2 by gravity over an at least approximately vertical air path 8, after which

[0271] (c) the strapping band 4 is pulled at least approximately horizontally under the packaged goods 2, in particular through a pallet gap 12a, and thereafter

[0272] (d) the strapping band 4 is stretched tightly around the packaged goods 2, and a strap end 4a of the strapping band 4 and a strap section of the strapping band 4 are joined together.

[0273] The method described above also discloses an advantageous use of the device 1 according to the invention for strapping palletized goods 2 with a strapping band 4, particularly in connection with the preferred variants of the method explained in more detail below. However, the method according to the invention can also be implemented independently of the device 1 according to the invention.

[0274] Preferably, in step (a), the strapping band 4 can be drawn over the packaged goods 2 by means of an extendable or retractable upper arm 6 of a strapping guide 5, and / or in step (c), it can be drawn under the packaged goods 2 by means of an extendable or retractable lower arm 7 of a strapping guide 5. This strapping guide 5 can, in particular, be such as the one described above in relation to the device 1 according to the invention. It has proven advantageous if the strapping band 4 is weighted at its end 4a, particularly for step (b), by a weight 9, which is collected at the end of the air gap 8 or before step (c). It is preferably provided that the end 4a and the section of the band are joined in step (d) by welding.

[0275] Further preferred variants and embodiments of the method result analogously from the above description of the exemplary embodiment of the device 1 with reference to Figures 1 to 5.

[0276] To illustrate a possible implementation of steps (a) and (b), reference is made in particular to Figures 2 and 5, as well as the accompanying description. Figure 3 shows an exemplary state after step (c). Figure 4 can be understood as a snapshot of a possible implementation of step (d).

[0277] Reference symbol list:

[0278] 1 Device

[0279] 2 Packaged goods

[0280] 3 Output device, tape reel

[0281] 4, 4' strapping band

[0282] 4a End of band

[0283] 4a' New end of band

[0284] 5 Belt guide device

[0285] 6 Upper arm

[0286] 6a Exit area

[0287] 6b Upper restraint device

[0288] 7 Lower arm

[0289] 7a Entrance area

[0290] 7b Lower restraint device

[0291] 8 air distance

[0292] 9 falling bodies

[0293] 10 Return device

[0294] 10a Driver

[0295] 11a Sensor element

[0296] 11 b Sensor

[0297] 12 pallets

[0298] 12a Pallet space

[0299] 13 Band connection device

[0300] 14 Lever device

[0301] 15 Feed device, feed rollers

[0302] 16 tape storage

[0303] 17 Control device, control rollers

[0304] 18 wheels

[0305] 19 Accumulator

[0306] 20 Control device

[0307] Channel 21

[0308] 22 Platform (Figure 5)

Claims

P a t e n t a n s p r ü c h e 1. Device (1) for strapping palletized goods (2) comprising at least a dispensing device (3) for providing a strapping band (4) and a band guiding device (5) for strapping the goods (2) with the strapping band (4), characterized in that the band guiding device (5) has at least one upper arm (6) and one lower arm (7) for guiding the strapping band (4), wherein the upper arm (6) has an exit area (6a) for exiting a band end (4a) of the strapping band (4) and the lower arm (7) has an entry area (7a) for inserting the band end (4a), wherein the band guiding device (5) has an at least approximately vertical air gap (8) between the exit area (6a) and the entry area (7a), and wherein a drop element (9) of the band guiding device (5) is detachably attachable to the strapping band (4),so that the strapping band (4) with the falling body (9) can be guided by gravity along the air path (8) to the entry area (7a) of the lower arm (7).

2. Device (1) according to claim 1, characterized in that the upper arm (6) and / or the lower arm (7) is each extendable or retractable, wherein the upper arm (6) and / or the lower arm (7) is preferably designed as a telescopic arm.

3. Device (1) according to claim 1 or 2, characterized in that the falling body (9) can be engaged or disengaged from an upper locking device (6b) of the upper arm (6) and / or from a lower locking device (7b) of the lower arm (7).

4. Device (1) according to claim 1, 2 or 3, characterized in that a return device (10) is provided for returning the falling body (9) from the lower arm (7) in the direction of the upper arm (6), which preferably runs parallel to the air gap (8).

5. Device (1) according to claim 4, characterized in that the return device (10) is designed as a circulating belt and / or circulating chain with at least one driver 10a for the falling body (9).

6. Device (1) according to claim 4 or 5, characterized in that the upper arm (6), the lower arm (7), the air gap (8) and / or the return device (10) together form an orbit for the falling body (9).

7. Device (1) according to one of claims 1 to 6, characterized in that the lower arm (7) is height-adjustable.

8. Device (1) according to one of claims 1 to 7, characterized in that an extension length of the upper arm (6) and / or an extension length of the lower arm (7) is measurable to ensure that the outlet area (6a) and the inlet area (7a) are aligned at least approximately vertically to each other for forming the air gap (8).

9. Device (1) according to one of claims 1 to 8, characterized in that a sensor (11 b) is provided on the lower arm (7) to detect when the lower arm (7) emerges below the packaged goods (2) during extension.

10. Device (1) according to one of claims 1 to 9, characterized in that an end of the lower arm (7) is inclined upwards and / or downwards.

11. Device (1) according to one of claims 1 to 10, characterized in that the falling body (9) is designed as a chain segment.

12. Device (1) according to one of claims 1 to 11, characterized in that a strap joining device (13) is provided which is configured to tighten the strapping band (4) around the packaged goods (2) and to join the band end (4a) and a band section together.

13. Device (1) according to one of claims 1 to 12, characterized in that a lever device (14) is provided for lifting and / or pressing down the strapping band (4) or the section of the band to be connected to the end of the band (4a).

14. Device (1) according to one of claims 1 to 13, characterized in that a feed device, preferably at least a pair of feed rollers (15) is provided to unwind the strapping band (4) from the dispensing device (3) and thereby fill a band storage unit (16).

15. Device (1) according to one of claims 1 to 14, characterized in that a control device, preferably at least one pair of control rollers (17), is provided to introduce the strapping band (4) in a controlled manner into the upper arm (6) of the strapping guide device (5) and / or to pull the strapping band (4) from the upper arm (6) back into the strap storage (16).

16. Device (1) according to claim 15, characterized in that the control device (17) has a motor which can be operated both forwards and backwards.

17. Device (1) according to claim 15 or 16, characterized in that the tape storage (16) is arranged between the feed device (15) and the control device (17).

18. Device (1) according to one of claims 1 to 17, characterized in that the device (1) is mobile, preferably has wheels (18) and / or an accumulator (19).

19. Method for strapping palletized goods (2) with a strapping band (4), characterized in that at least the following steps are provided: (a) the strapping band (4) is pulled at least approximately horizontally over the packaged goods (2), after which (b) the strapping band (4) is dropped laterally past the packaged goods (2) by gravity over an at least approximately vertical air path (8), after which (c) the strapping band (4) is pulled at least approximately horizontally under the packaged goods (2), in particular through a pallet gap (12a), and thereafter (d) the strapping band (4) is stretched tightly around the packaged goods (2), and a strap end (4a) of the strapping band (4) and a section of the strapping band (4) are joined together.

20. Method according to claim 19, characterized in that The strapping band (4) is pulled over the packaged goods (2) in step (a) by means of an extendable or retractable upper arm (6) of a strap guiding device (5) and / or under the packaged goods (2) in step (c) by means of an extendable or retractable lower arm (7) of a strap guiding device (5).

21. Method according to claim 19 or 20, characterized in that the strapping band (4) is weighted at its end (4a), in particular for step (b), by a drop body (9) which is caught at the end of the air gap (8) or before step (c).

22. Method according to claim 19, 20 or 21, characterized in that the strip end (4a) and the strip section are joined in step (d) by welding them together.

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