DE102019135616A1 - Transport device - Google Patents

Abstract

The present invention relates to a transport device for pallet goods, such as a packaging material supply in particular made of paper, in particular a packaging material supply stack, comprising a chassis and a clamping mechanism arranged thereon, which is set up to clamp the pallet goods by means of a vertical clamping force of at least 1 N, in particular at least 10 N or at least 20 N, and in particular at most 2,000 N or at most 1,000 N, to jam.

Description

The present invention relates to a transport device for pallet goods, such as a packaging material supply, in particular made of paper and / or in the form of a fan-fold stack, in particular for loading a transport pallet with pallet goods and for unloading the transport pallet.

When handling goods in transit, one of the challenges is to ensure that the goods in transit do not tip over or fall over in an undesired manner. This has proven to be difficult in particular in the packaging industry, since the packaging materials used there are very light and thus react sensitively to external influences, such as for example wind influences, and lose their desired structure. Packaging material supplies, in particular in the form of a fanfold stack, for example from a paper web, are generally to be set up close to a packaging material processing machine. Before the packaging material supplies reach their place of use, however, they must be transported in order to set them up, for example, in a storage facility and / or on a transport pallet. It must be ensured that the respective supply of packaging material, in particular the fan-fold stack, remains dimensionally stable and is also not damaged.

Out WO 2018/209210 A1 a packaging material supply station is known in which the packaging material is folded into a fanfold stack and is stored in a frame which is intended to prevent the stack from tipping over to the side. A holding element is also mounted on the frame, which is vertically movably guided in a rail and is set up to exert a holding force from above on the Leporello stack according to its weight in order to secure it on the frame against the effects of the wind. The force that can be applied to the Leporello stack is at WO 2018/209210 A1 on the one hand very low and on the other hand limited to the level of the weight of the holding element. It is therefore not possible, for example, to reliably secure different transport goods for which different clamping forces are to be used.

It is the object of the present invention to overcome the disadvantages from the known prior art, in particular to provide a more effective transport device and / or better securing the pallet or transport goods.

This object is achieved by the features of claims 1, 20 and 21, respectively.

Then a transport device for pallet goods or transport is provided. The pallet goods can, for example, be a supply of packaging material, in particular made of paper. The packaging material supply can be designed, for example, as a packaging material supply stack. For example, the packaging material supply stack can be produced from a web-shaped packaging material and folded in a zigzag manner to form a so-called fan-fold stack. The packaging material web can be made of paper, such as recycled paper, in particular waste paper and / or 100% recyclable paper, which can be produced without chemical ingredients. Recycled paper is in particular paper materials with a low proportion (less than 50%) of fresh fiber-containing paper material. For example, paper materials that contain 70% to 100% waste paper are used. The recycling paper in the context of this invention can be paper material which can have a tensile strength index in the machine direction of at most 90 Nm / g, preferably a tensile strength of 15 Nm / g to 60 Nm / g, and a tensile strength index transverse to the machine direction of at most 60 Nm / g may have, preferably a tensile strength of 5 Nm / g to 40 Nm / g. A standard can be used to determine the tensile strength or the tensile strength index DIN EN ISO 1924-2 or DIN EN ISO 1924-3 can be used. Additionally or alternatively, a recycled paper property or waste paper property can be characterized by the so-called burst resistance. A material in this sense is recycled paper with a bursting index of at most 3.0 kPa * m ^ 2 / g, preferably with a bursting index of 0.8 kPa * m ^ 2 / g to 2.5 kPa * m ^ 2 / g. The DIN EN ISO 2758 standard is used to determine the bursting index. Furthermore, the packaging material has a mass per unit area of in particular 40 g / m2 to a maximum of 140 g / m2. According to the invention, the starting packaging material can be in the form of a roll of material web or a zigzag-folded packaging material stack, which is also referred to as a fan-fold stack.

The transport device comprises a chassis and a clamping mechanism arranged thereon, in particular for vertically clamping the palletized goods. According to one aspect of the present invention, the clamping mechanism is set up to clamp the pallet goods by means of a vertical clamping force of at least 1 N, in particular at least 1N, in particular at least 10 N or at least 20 N, and in particular at most 2,000 N or at most 1,000 N. It should be understood that the clamping force is to be understood in relation to a counterforce directed by the pallet goods against the clamping.

This provides a transport device in which the securing of the palletized goods on the transport device is improved. By the increased vertical clamping force on the transported goods compared to the prior art, the pallet goods are secured more reliably against tilting or even falling off the transport device. The clamping mechanism according to the invention also protects the pallet goods against external influences, such as wind influences, and ensures that the pallet goods, designed for example as a paper packaging material supply stack, remain dimensionally stable in order to be able to be fed to a packaging material processing machine according to their function.

In an exemplary embodiment of the transport device according to the invention, the clamping mechanism has a base for reaching under the pallet goods and a support for placing on the pallet goods. At least one of the base and / or support is arranged on the chassis in such a way that it can be moved relative to the other. In particular, the base and / or support are arranged to be movable towards one another, so that a vertical clamping force can be communicated to the pallet goods, in particular from above and below. It should be clear that the component consisting of the base and the support actively communicates the vertical clamping force which is arranged movably on the chassis, and that component of the base and / or support provides a passive counter-clamping force which is arranged stationary on the chassis. According to the exemplary embodiment, at least one of the support and / or support provides an active clamping force, while the other of the support and / or support provides the passive counter-clamping force. For example, both the base and the support are movably arranged on the chassis in such a way that the base and support can each communicate an active clamping force to the palletized goods.

According to a further exemplary embodiment of the transport device according to the invention, the clamping mechanism has a base for reaching under the pallet goods, a support for placing on the pallet goods and an auxiliary energy source. By means of the auxiliary energy source, a vertical auxiliary force can be communicated to the pallet goods in addition to the weight of the support. For example, the support is arranged or mounted on the chassis so that it can be moved such that it can press on the goods on the pallet under the action of gravity. In addition, the auxiliary energy source can act on the support in such a way that an additional vertical auxiliary force can be exerted on the pallet goods in order to increase the vertical clamping force. For example, the vertical auxiliary force additionally provided by the auxiliary energy source can be controlled or adjusted so that, for example, depending on the pallet goods to be transported and clamped, an additional clamping force of different strength can be applied and communicated to the pallet goods. Particularly in the case of injury-sensitive pallet goods, such as is the case with packaging material supplies, especially made of paper, it has been found that it is advantageous to be able to use different clamping forces in order to be able to reliably secure the different pallet goods without damaging them.

In a further exemplary embodiment of the present invention, the clamping mechanism has a base for reaching under the pallet goods and a support for placing on the pallet goods. Furthermore, the clamping mechanism is set up to communicate a vertical clamping force to the pallet goods, which is independent of the weight of the support. The level of the clamping force to be communicated to the pallet goods can accordingly be freely selectable or adjustable in such a way that the resulting force on the pallet goods is not influenced by the weight of the support.

According to an exemplary development of the transport device according to the invention, the clamping mechanism can be controlled in such a way that the clamping force to be communicated to the pallet goods can be adjusted. Furthermore, the clamping mechanism can be designed in such a way that the clamping force can be adjusted by means of a vertical clamping path of the support and / or the base, depending on which component of the support and base is arranged to be movable relative to the chassis. The clamping path can be understood as the vertical distance from the first contact between support or base and pallet goods, in which the pallet goods are still in an undeformed, non-jammed state, up to that vertical height of the support or base, up to this has displaced the support or the base vertically in order to clamp the pallet goods vertically, in particular to compress and / or compress them.

In a further exemplary embodiment of the transport device according to the invention, the clamping mechanism has a power machine, for example a potential energy store, such as a pretensionable spring, or a motor, such as a hydraulic motor or an electric motor. The power machine can be assigned to the support and / or the support in order to move the support and / or the support vertically. For example, the potential energy store can be in an initial position in which potential energy is stored before the pallet goods to be clamped are on the transport device. As soon as the goods on the pallet have been picked up by the transport device, the potential energy for applying the vertical clamping force to the goods on the pallet can be generated by means of the energy store be released. This can be done, for example, by pretensioning a spring and holding it in the pretensioned position. As soon as it is desired that the vertical clamping force is exerted on the pallet goods, the spring preload can be released or canceled so that the spring force is transmitted indirectly to the pallet goods via the clamping mechanism.

In an exemplary development of the present invention, the base and / or the support are / is mounted on the chassis so that they can be moved in such a way that a vertical clamping path of the supports and / or the support is less than 25 cm, in particular less than 15 cm, less than 10 cm or less than 5 cm. For example, the motor, which is in particular a lifting motor, can be set up to move the base and / or the support by less than 25 cm, in particular less than 15 cm, less than 10 cm or less than 5 cm. According to the invention, it was found that the aforementioned vertical clamping path of a maximum of 25 cm is sufficient to reliably secure the pallet goods and at the same time ensure that the pallet goods, in particular a sensitive supply of packaging material, are not damaged.

In a further exemplary embodiment, the support is implemented as an essentially flat plate, in particular with a rectangular basic shape. Furthermore, the support can have an essentially flat or convexly curved support surface for placing on the pallet. The support surface can be at least 1% and / or at most 100%, in particular at least 10% and / or at most 50%, for example about 15% to 20%, of a base area of the palletized goods. A flat support surface has proven to be advantageous for the uniform transmission of the vertical clamping force, especially with sensitive pallet goods. However, it is also conceivable that the support is designed as an elongated rod with a cylindrical or angular cross-section, which extends, for example, along the full width of the pallet. According to the invention, it has been found that targeted clamping of the pallet goods is sufficient for reliable securing of the pallet goods without having to cover the entire base area of the pallet goods.

In an exemplary development of the present invention, the base and / or the support are / is mounted on the chassis such that they can be moved vertically by means of a linear guide. The linear guide can be designed in such a way that only a translational displacement of the support and / or the base is possible. The support can be firmly connected to a rail that can be moved vertically relative to the chassis. A guide body which is permanently coupled to it and which interacts with the rail in order to move the support vertically relative to the chassis can be arranged on the chassis. For example, the rail is columnar and / or elongated and can have an essentially rectangular cross section. It is clear that other cross-sectional areas are also possible. It should also be clear that the guide body is to be dimensioned or designed as a function of the cross section of the rail.

According to an exemplary development of the transport device according to the invention, the guide body has a through opening in a frame rod of the chassis, which is shaped in particular to be complementary to an outer dimension of the rail. The rack rod can extend transversely to the direction of displacement of the support and / or the base, in particular in the manner of a bridge over the palletized goods. The support can be positioned in the vertical direction between the pallet goods and the rack rod and can be moved vertically.

In an exemplary embodiment, the linear embodiment is provided with a latching device in order to prevent the support from shifting. The latching device can have a passive state in which a displacement of the edition is permitted, and an active state in which a displacement of the edition is prevented. Switching between active and passive state can be done manually or electrically. The latching device can also be designed in such a way that the active state is automatically maintained. For example, the support no longer needs to be supplied with force when the support has assumed the vertical clamping position and has clamped the pallet goods vertically in order to communicate the vertical clamping force to them after the latching device has assumed the active state. The counterforce transmitted from the pallet goods to the support, in particular the deformation restoring force, is essentially completely absorbed by the latching device.

In a further exemplary embodiment of the transport device according to the invention, the latching device has at least two latching positions, the spacing of which from one another, in particular vertical spacing, defines a maximum clamping or travel path of the support. The latching positions can be assumed by latching means attached to one another on the rail side and a latching element on the chassis, such as, for example, a particularly spring-preloaded bolt. The latching positions can be, on the one hand, an initial or starting position of the support, in which the support releases the pallet goods, and, on the other hand, an active clamping position in which the support vertically clamps the pallet goods. For example, the initial or starting position can be a top vertical position and the active clamping position is a lowermost vertical position of the support. According to an exemplary development, the latching device has a plurality of latching positions which are preferably uniformly distributed in the vertical direction and which define travel increments for the support. A distance between two adjacent latching positions accordingly forms a travel increment. In the respective locking positions, the support is held vertically and secured against further displacement.

In a further exemplary embodiment of the transport device according to the invention, the latching positions are implemented by latching means attached to the rail and, on the other hand, by at least one latching element on the chassis. The latching element can, for example, be an in particular spring-preloaded bolt. Latching element and latching means work together to secure the support against further vertical movement after a desired clamping or travel path. To secure the support vertically, the latching element latches into the latching means on the rail.

According to a further exemplary development of the transport device according to the invention, the latching means are implemented as depressions in the linear guide. Alternatively or additionally, the latching element is designed as a reversibly movable projection between an active engagement position and a passive position, in which a displacement of the support relative to the chassis is possible. The projection can, for example, be a particularly spring-loaded bolt. In the active engagement position, the projection protrudes into the recess, in particular it engages.

According to an exemplary development of the transport device according to the invention, the support is implemented as an essentially flat plate and essentially positioned in the center of a base area of the chassis. Alternatively or additionally, the support can be arranged on the chassis in such a way that the plate can be placed centrally on the pallet in order to exert the clamping force. It can be provided that the support surface of the plate-shaped support is dimensioned smaller than the base surface of the pallet goods to be clamped. In particular, the support is arranged in such a way that the pallet goods can be placed on the pallet goods in the middle, both with regard to a length dimension and a width dimension of a base area. Furthermore, it can be provided that the support is arranged on the chassis in such a way that a bearing allowing the vertical movement of the support, in particular the linear guide, is positioned vertically above the support, in particular axially above a center of the support. This results in a compact, in particular narrow, construction of the transport device.

In a further exemplary embodiment of the transport device according to the invention, the chassis has at least two, in particular lockable, wheels. The wheels are arranged at a distance from one another in such a way that they lay parallel to the side of a transport pallet during a rolling movement of the transport device. Furthermore, the wheels are mounted on legs extending parallel to one another. A receiving space for the palletized goods is provided between the two legs of the chassis. With regard to the chassis, refer to the applicant's international patent publication WO 2016/070969 A1 , the entire content of which is incorporated herein by reference.

According to an exemplary development of the transport device according to the invention, a railing is connected to the chassis and / or attached to it. The railing is generally used to support the palletized goods. The railing has a rear support, for example a flat rear wall forming along the full width of the chassis, and two side supports each connected to the rear wall. The side supports can be designed as flat side walls extending perpendicularly away from the rear support or as elongated, for example substantially L-shaped, support struts. The side supports and the rear support together form a receiving space for the palletized goods. The base and / or the support are at least partially retractable into the receiving space and can be extended therefrom or are mounted on the chassis such that they can be moved in the receiving space.

According to an exemplary development of the present invention, an electrical control, which can in particular be manually operated, is provided for the base and / or the support. The control can be coupled to the motor for actuating and moving the support and / or the base. The controller can have a user interface and can use a user input that represents a command for a clamping or travel path to move the base and / or support. Alternatively or additionally, the controller can be set up in such a way that the base and / or the support is moved using a user input or a command stored in a memory of the controller for a clamping or travel path. For example, standard travel paths or increments can be stored in the memory, which, for example, are predefined and stored for a certain type of palletized goods. By actuating the control, the standard travel can be called up in order to relocate the support and / or the document according to the predefined travel path.

According to an exemplary development of the transport device according to the invention, the base comprises a tine arrangement of at least two tines with parallel extension for lifting the pallet goods from a transport pallet and for depositing the pallet goods, for example on the transport pallet or on another surface.

The transport device can be designed, for example, as a pallet lifting device for loading or unloading a pallet, such as a standard pallet, for example a Euro pallet. The standard pallet comprises a pallet support structure, usually made of wood, in particular made of braced wooden blocks, the pallet support structure usually having lateral free spaces below the pallet support, into which forklift tines can move in order to lift the standard pallet including the pallet goods. Furthermore, the standard pallet has a support forming the top of the pallet, on which the respective transport or pallet goods are to be placed and which are made up of several longitudinal panels, such as boards, arranged at a distance from one another, forming at least two, preferably four, longitudinal gaps that are parallel to one another consists. The longitudinal gaps are open towards the top of the pallet and have a minimum height based on a longitudinal or width strut of the thickness of the longitudinal panels. The number of prongs of the prong arrangement can correspond to the number of longitudinal gaps in the support. Furthermore, it can be provided that a tine parallel spacing of two tines is adapted to a longitudinal gap spacing of two longitudinal gaps and at least the at least two tines are adapted to the shape of the at least two longitudinal gaps in such a way that they can be retracted in the longitudinal direction of the longitudinal gaps, in particular without the retracted tine section over the pallets - Top protrudes. The prongs can be dimensioned in such a way that they can either be retracted horizontally in the longitudinal direction into the longitudinal gap when a transport item or a pallet item, such as a packaging material supply stack, is already on the support of the standard pallet. Also with regard to the tine arrangement, see International Patent Publication WO 2016/070969 A1 of Applicant, which is incorporated herein by reference in its entirety.

According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a method for transporting palletized goods, in particular for loading and unloading a transport pallet, is provided.

The pallet goods can, for example, be a supply of packaging material, in particular made of paper. The packaging material supply can be designed, for example, as a packaging material supply stack. For example, the packaging material supply stack can be produced from a web-shaped packaging material and folded in a zigzag manner to form a so-called fan-fold stack. The packaging material web can be made of paper, such as recycled paper, in particular waste paper and / or 100% recyclable paper, which can be produced without chemical ingredients. Recycled paper is in particular paper materials with a low proportion (less than 50%) of fresh fiber-containing paper material. For example, paper materials that contain 70% to 100% waste paper are used. The recycling paper in the context of this invention can be paper material which can have a tensile strength index in the machine direction of at most 90 Nm / g, preferably a tensile strength of 15 Nm / g to 60 Nm / g, and a tensile strength index transverse to the machine direction of at most 60 Nm / g may have, preferably a tensile strength of 5 Nm / g to 40 Nm / g. A standard can be used to determine the tensile strength or the tensile strength index DIN EN ISO 1924-2 or DIN EN ISO 1924-3 can be used. Additionally or alternatively, a recycled paper property or waste paper property can be characterized by the so-called burst resistance. A material in this sense is recycled paper with a bursting index of at most 3.0 kPa * m ^ 2 / g, preferably with a bursting index of 0.8 kPa * m ^ 2 / g to 2.5 kPa * m ^ 2 / g. The DIN EN ISO 2758 standard is used to determine the bursting index. Furthermore, the packaging material has a mass per unit area of in particular 40 g / m2 to a maximum of 140 g / m2. According to the invention, the starting packaging material can be in the form of a roll of material web or a zigzag-folded packaging material stack, which is also referred to as a fan-fold stack.

According to the invention, the goods on the pallet are at least partially clamped against tilting from above and from below. A vertical clamping force of at least 1 N, in particular at least 10 N or at least 20 N, and in particular at most 2,000 N or at most 1,000 N, is communicated to the pallet goods.

According to an exemplary embodiment of the method according to the invention, the method is characterized in accordance with the transport device according to an aspect or exemplary embodiment described above.

Preferred embodiments are given in the subclaims.

• 1-4 schematische Darstellungen zur Funktionsweise einer beispielhaften Ausführung einer erfindungsgemäßen Transportvorrichtung;
• 5 eine perspektivische Frontansicht einer beispielhaften Ausführung einer erfindungsgemäßen Transportvorrichtung;
• 6 eine perspektivische Rückansicht der Transportvorrichtung gemäß 5;
• 7 eine perspektivische Detailansicht eines Ausschnitts eines Klemmmechanismus der Transportvorrichtung gemäß den 5 und 6;
• 8 eine perspektivische Frontansicht der Transportvorrichtung gemäß den 5 bis 7, die mit einem Palettengut beladen ist;
• 9 eine Frontansicht der Transportvorrichtung gemäß 8;
• 10 eine Schnittansicht der Transportvorrichtung gemäß 9 entsprechend der Linie X-X;
• 11 eine weitere perspektivische Frontansicht der mit Palettengut beladenen Transportvorrichtung;
• 12 eine weitere perspektivische Detailansicht des Klemmmechanismus;
• 13 eine weitere Schnittansicht der Transportvorrichtung entsprechend 11; und
• 14-16 schematische Ansichten alternativer Ausgestaltungen von Auflagen eines Klemmmechanismus.

In the following, further properties, features and advantages of the invention will become clear by means of a description of preferred embodiments of the invention with reference to the accompanying exemplary drawings, in which:

• 1-4 schematic representations of the mode of operation of an exemplary embodiment of a transport device according to the invention;
• 5 a perspective front view of an exemplary embodiment of a transport device according to the invention;
• 6th a perspective rear view of the transport device according to 5 ;
• 7th a perspective detailed view of a section of a clamping mechanism of the transport device according to FIG 5 and 6th ;
• 8th a perspective front view of the transport device according to FIG 5 to 7th that is loaded with a pallet;
• 9 a front view of the transport device according to 8th ;
• 10 a sectional view of the transport device according to 9 corresponding to line XX;
• 11 a further perspective front view of the transport device loaded with pallet goods;
• 12th a further perspective detailed view of the clamping mechanism;
• 13th a further sectional view of the transport device accordingly 11 ; and
• 14-16 schematic views of alternative configurations of supports of a clamping mechanism.

In the following description of exemplary embodiments of the present invention, a transport device according to the invention is generally given the reference number 1 Mistake. The mode of operation and the structure of exemplary embodiments of a transport device according to the invention 1 is in the following with reference to a pallet 3 described, which is designed as a packaging material supply stack made of paper and in zigzag fold, ie in the so-called Leporello shape, stored and preformed.

Based on 1 to 4th , the schematic front views of a transport device according to the invention 1 will show the functioning of the vertical clamping of the packaging material supply stack 3 by means of the transport device according to the invention 1 described. Basically, the transport device comprises 1 a chassis 5 and a clamping mechanism arranged thereon 7th for vertical clamping of the packaging material supply stack 3 . From the chassis 5 is schematically a lower cross strut 9 shown which two side wheels 11 connects and stores. The cross brace 9 extends essentially in the horizontal direction H. On the cross strut 9 close on both lateral sides essentially in the vertical direction V extending side supports 13th on, which in turn by means of an upper cross strut or frame rod 15th are connected to each other. On chassis 5 and support frame or railing is referred to with reference to 5 ff. discussed in more detail.

The clamping mechanism 7th is set up to the packaging material supply stack 3 to be clamped by means of a vertical clamping force of at least 1 N. The clamping mechanism 7th includes a document 17th for at least partially reaching under the packaging material supply stack 3 . In the 1 to 4th is the document 17th as a tine arrangement with a total of four tines 19th parallel extension and formed substantially the same cross-section. This makes it possible to load and unload a transport pallet. The prongs 19th are set up to be able to engage or retract into longitudinal gaps formed on the top of the pallet between each two longitudinal plates forming the pallet support, around the stack of packaging material supply 3 to be lifted from or placed on a transport pallet. The clamping mechanism 7th also includes an edition 21 for placing on the packaging material supply stack 3 . Schematically in the 1 to 4th it is indicated that the edition 21 via a linear guide 23 movable on the chassis 5 is stored. The linear guide 23 is with the upper cross brace 15th connected.

1 represents an initial state in which the packaging material supply stack 3 from the transport device 1 recorded and on the pad 17th is placed or set up. As in 1 As can be seen, there is still no vertical clamping force by the clamping mechanism 7th onto the packaging material supply stack 3 upset. One of a top 25th of the packaging material supply stack 3 facing support surface 27 of the edition 21 is at a vertical distance from the top of the packaging material supply stack 25th arranged.

In 2 can be seen that the edition 21 by means of the linear guide 23 is moved downward in the vertical direction (indicated by the arrow with the reference numeral a ) so that the contact surface 27 with the packaging material supply stack top 25th is in contact. Already at this point in time cause conditions 21 and pad 17th a kind of tilt protection and a safeguard against external influences, such as Wind influences which could cause the packaging material supply stack to fan out.

In 3 is by means of the arrows with the reference number b indicated that for vertical clamping of the packaging material supply stack 3 the underlay 17th is moved vertically upwards. The edition 21 remains essentially at the same vertical height. Thus practice edition 21 and pad 17th one to the vertical traverse paths or clamping paths of support 21 and pad 17th proportional vertical clamping force on the packaging material supply stack 3 out.

In 4th is the vertical clamping of the preferably sensitive packaging material supply stack 3 made of paper: centered with respect to a width dimension of the packaging material supply stack 3 , that is, at the point where the edition 21 the packaging material supply stack 3 The packaging material supply stack is jammed from above 3 compressed or compressed in the vertical direction. On the lateral sides of the packaging material supply stack 3 This is accompanied by a minor jamming, since in these areas the counterforce in the form of the support 21 is missing. By vertically clamping the stack of packaging material 3 this can be reliably moved and transported without the packaging material supply stack 3 loses its shape. Via the vertical clamping or travel paths of the support 21 and pad 17th can also reduce the vertical clamping force exerted on the packaging material supply stack 3 exercised, be discontinued. It is thus possible to reliably clamp different types of material on the one hand and to ensure that the clamping force is not selected too high, so that the packaging material would be damaged, on the other hand.

In the 5 to 7th is the transport device 1 shown according to an exemplary embodiment, with no goods to be transported or palletized goods on the transport device 1 is located. The chassis 5 has a U-shape in plan view and comprises two lateral legs extending substantially parallel to one another 29 and the lower cross brace 9 on which the two legs 29 connects with each other. On both thighs 29 are two lockable wheels each 11 at the end portions of the legs 29 rotatably mounted, by means of which the transport device 1 can be moved freely. The four prongs that extend parallel to each other 19th the tine arrangement of the base 17th are mounted vertically movable on the chassis and in vertical slots 31 in the cross brace 9 of the chassis 5 recorded. The prongs can be in the vertical slots 31 be guided up and down.

With the chassis 5 connected is a railing 33 that is a back wall 35 possesses, which is essentially in the vertical direction V from the chassis 5 extends upwards, as well as two side supports 13th , which are strut-shaped and have a bow or U-shape in the side view. On the side supports 13th is a handle each 37 for handling the transport device 1 arranged. The back wall 35 forms together with the side supports 13th a receiving space for the palletized goods. This means that one of the transport device 1 Pallet goods carried or picked up on them 3 within the receiving space of the transport device 1 is received and at least partially through the rear wall 35 who have favourited the side supports 13th is limited and supported. As already mentioned, the pallet goods are removed from the base from below 17th supported and from above by the support 21 . The edition 21 is by means of a linear guide 23 vertically movable on the chassis 5 , especially on the cross brace 15th , stored. The support, which is essentially designed as a flat plate 21 is on a rail that is substantially rectangular in cross section 39 attached, extending from one of the supporting surface 27 opposite surface 41 extends vertically upwards and through a through opening formed in the cross strut 43 protrudes. The passage opening 43 forms a guide body with which the rail 39 cooperates to make the edition 21 to move vertically relative to the chassis, so that the pallet 3 can be jammed vertically.

Referring to 6th showing a rear view of the transport device 1 according to 5 represents, it can be seen that the railing 33 Is formed in several parts and is fastened to one another, for example, via screw connections. However, it is also conceivable that the chassis 5 and the railing 33 are formed integrally with one another and / or have other structures. Furthermore, in 6th an alternative arrangement of the handles 37 shown. While the handles in 5 in relation to the open receiving space of the transport device 1 as well as with regard to a longitudinal extension of the prongs 19th on the front on the side supports 13th are arranged are the handles 37 in 6th on the back approximately at the level of the rear wall 35 arranged. An operator can use the transport device 1 thus in a simple manner from the rear, that is to say from the side of the rear wall 35 , handle, slide and move.

Furthermore, in 6th a locking device 45 the linear guide 23 shown by means of a shifting of the edition 21 in the vertical direction V can be prevented. The locking device 45 has an active engagement state in which a displacement of the support 21 in the vertical direction V is avoided. Furthermore, the latching device 45 assume a passive state in which the support 21 Can be moved vertically to the pallet 3 to jam vertically.

On the linear guide 23 and the locking device 45 is explained in more detail with the 7th received. The essentially rectangular columnar rail 39 is, as already mentioned, firmly attached to the edition 21 connected and leads together with the edition 21 the vertical movement through. For guiding the rail 39 is in the bridge-like over the chassis and / or the picked up pallet 3 extending upper cross brace 25th a through opening 43 formed, the shape essentially complementary to an external dimensioning of the rail 39 is designed. On the rail side there are a plurality of latching means which are arranged at a vertical distance, in particular evenly from one another 47 in the form of indentations in the rail 39 brought in. The locking means 47 serve to provide vertical locking positions for the support 21 to be determined. A vertical distance between two adjacent locking means 47 sets a clamping / travel path in the form of travel increments for the support 21 firmly.

The locking means 47 act with a latching element on the frame 49 the locking device 45 together. With the latching element 49 it is, for example, a spring-loaded bolt that is transverse to the vertical displacement direction of the support 21 is movable. In addition to the through opening in the cross brace 9 can be a guide sleeve 51 firmly with the cross brace 9 be connected, which is hollow, through which the rail 39 extends through and in which the rail 39 is led. The latching element 49 is designed to assume a latching position and to prevent the support from moving 21 into the locking means designed as depressions 47 to click into place.

An electric motor not shown in detail 63 , for example a lifting motor, which can for example have an electrical control, is set up to the base 17th and / or the edition 21 to shift in such a way that the vertical clamping force on the transported goods or pallet goods 3 can be applied. The vertical clamping force is adjusted by controlling the vertical clamping or travel path of the support 21 or the document 17th .

In the 8th to 11 is again the transport device 1 according to the 5 to 7th shown, with a packaging material supply stack 3 of paper from the transport device 1 is worn. To avoid repetition, please refer to the previous description in relation to the 5 to 7th referenced. From a synopsis of the 8th to 11 it can be seen that the supporting surface 27 of the edition 21 Is dimensioned significantly smaller than a base area of the packaging material supply stack 3 . Furthermore, the edition 21 as well as its linear guide 23 so on the chassis 5 or the railing 33 positioned that edition 21 essentially centrally on the top of the packaging material supply stack 25th can be pressed or hung up. In the 8th to 11 is the edition 21 still at a certain vertical distance from the packaging material supply stack 3 so that there is still no clamping effect. The front shows the edition 21 a bent edge 53 on, essentially to protect the preferably sensitive packaging material supply stack 3 serves. In particular from 10 it can be seen that a width dimension of the railing 33 , that is, a distance in the horizontal direction between the two side supports 13th is chosen so that the side supports are 13th laterally on the packaging material supply stack sides 55 , 57 extend past. The packaging material supply stack 3 lies evenly on the surface 17th , that is, on the prongs 19th , on.

In the sectional view according to 11 running along the line XI-XI in 10 is to be understood, is a part of the power transmission mechanism for the vertical movement of the support 21 pictured. The back wall 35 is formed hollow and comprises one of the packaging material supply stack 3 facing inside 59 as well as one of the inside 59 opposite outside 61 . In between, a free space is formed in which at least partially the power transmission mechanism for actuating the support 21 and / or the document 17th is recorded. For example, seen vertically, there is an electric lifting motor at the bottom 63 that has a gearbox 65 , which is partially shown, with the linear guide 23 is coupled. Activation of the electric motor to move the support 21 and / or the document 17th takes place by means of a user interface 65 , for example a button or a push button switch on the outside 61 the back wall 35 . For example, actuation can take place as follows: Via a user input, that is to say actuation or pressing of the pressure switch 65 can the electric lift motor 63 activated to by means of the gearbox 65 a vertical method of support 21 relative to the railing 33 and the frame 5 causing a vertical clamping force between the base 17th and edition 21 is formed. Will the user interface 65 The electric lift motor is released again by the user 63 deactivated. Then the spring-loaded bolt of the locking device 45 in one of the rail-side locking means 47 snap into place, which is at least approximately at the same vertical height as the bolt 49 located to another method of edition 21 to prevent and to maintain the vertical clamping force on the packaging material supply stack.

In the 11 to 13th is the jammed state of the transport device 1 shown schematically. To avoid repetition, the preceding description with regard to the transport device is essentially referred to 1 referenced. As in particular from the 12th and 13th is the edition 21 move vertically downwards and make contact with the top of the packaging material supply stack 25th from the vertical clamping force on the packaging material supply stack 3 in cooperation with the document 17th to realize. In 12th is the vertical displacement of the rail 23 and the edition 21 can be seen from the fact that the rail 23 in comparison to 7th is shifted vertically downwards, which is particularly evident from the fact that the rail 39 less far vertically from the passage opening 43 protrudes and a larger number of locking means 47 below the locking bolt 49 are located.

The 14th to 16 show alternative versions of a support 21 the clamping mechanism 7th . The edition 21 in 14th has a flat top 41 and a convexly curved, part-spherical underside with one of the packaging material supply stack 3 facing support surface 27 . The edition 21 according to the 15th is designed, for example, as an elongated rod, which can have a round or angular cross-section, for example, and its bearing surface on the packaging material supply stack 3 about one percent of its footprint. The edition 21 out 16 differs from the edition according to the 1 to 13th Essentially in that their dimensions are chosen so that they cover the base of the packaging material supply stack 3 completely covered or even protrudes beyond it.

The features disclosed in the above description, the figures and the claims can be important both individually and in any combination for the implementation of the invention in the various configurations.

List of reference symbols

1

Transport device

3

Pallet goods

5

chassis

7th

Clamping mechanism

9

Cross brace

11

wheel

13th

Side support

15th

Cross brace

17th

document

19th

Prongs

21

Edition

23

Linear guide

25th

Pallet top side

27

Support surface

29

leg

31

Vertical slot

33

railing

35

Back wall

37

Handle

39

rail

41

Top

43

Through opening

45

Locking device

47

Locking means

49

Latching element

51

Guide sleeve

53

curved edge

55, 57

Side surfaces of the palletized goods

59

inside

61

Outside

63

engine

65

transmission

67

Actuation interface

a, b

Direction of movement

V

Vertical direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• WO 2018/209210 A1 [0003]
• WO 2016/070969 A1 [0023, 0027]

Non-patent literature cited

• DIN EN ISO 1924-2 [0006, 0029]
• DIN EN ISO 1924-3 [0006, 0029]

Claims (21)

Transport device (1) for pallet goods (3), such as a packaging material supply, in particular made of paper, in particular a packaging material supply stack, comprising a chassis (5) and a clamping mechanism (7) arranged on it, which is set up to clamp the pallet goods (3) by means of a vertical clamping force of at least 1 N, in particular at least 10 N or at least 20 N, and in particular at most 10,000 N or at most 2,000 N, to jam Transport device (1) after Claim 1 , wherein the clamping mechanism (7) has a base (17) for reaching under the pallet goods and a support (21) for placing on the pallet goods (3), the base (17) and / or the support (21) on the chassis ( 5) are arranged to be movable towards one another, so that a vertical clamping force can be communicated to the pallet goods, in particular from above and below. Transport device (1) according to one of the preceding claims, wherein the clamping mechanism (7) has a base (17) for reaching under the pallet goods, a support (21) for placing on the pallet goods (3) and an auxiliary energy source by means of which the pallet goods (3 ) in addition to the weight of the support (21), a vertical assistant can be communicated. Transport device (1) according to one of the preceding claims, wherein the clamping mechanism (7) has a base (17) for reaching under the pallet goods and a support (21) for placing on the pallet goods (3) and is designed to hold the pallet goods (3) to communicate a vertical clamping force that is independent of the weight of the support (21). Transport device (1) according to one of the preceding claims, wherein the clamping mechanism (7) is controllable in such a way that the clamping force to be communicated to the pallet goods (3) can be adjusted, in particular the clamping force by means of a vertical clamping path of the support (21) and / or the Pad (17) is adjustable. Transport device (1) according to one of the preceding claims, wherein the clamping mechanism (7) has a power machine, for example a potential energy store, such as a pretensionable spring, or a motor, such as a hydraulic motor or an electric motor, which supports the support (21) and / or is assigned to the base (17) in order to move the base (17) and / or the support (21) vertically. Transport device (1) according to one of the Claims 2 to 6th , wherein the base (17) and / or the support (21) are / is movably mounted on the chassis (5) in such a way that a vertical clamping path of the base (17) and / or the support (21) is less than 25 cm, in particular is less than 15 cm, less than 10 cm or less than 5 cm, and / or wherein the motor, in particular the lifting motor, is set up to move the base (17) and / or the support (21) by less than 25 cm, in particular to move less than 15 cm, less than 10 cm or less than 5 cm. Transport device (1) according to one of the Claims 2 to 7th , wherein the support (21) is implemented as a substantially flat plate, in particular with a rectangular basic shape and / or has a substantially flat or convexly curved support (21) surface for placing on the palletized goods (3), the support (21) in particular area is at least 1% and / or at most 100% of a base area of the palletized goods. Transport device (1) according to one of the Claims 2 to 8th , the support (17) and / or the support (21) being / is mounted on the chassis (5) so as to be vertically movable by means of a linear guide (23), the support (21) being fixed with a relative to the chassis (5) vertically movable rail (39) is connected, which cooperates with a guide body fixedly connected to the chassis (5) in order to move the support (21) vertically relative to the chassis (5), wherein in particular the rail (39) is columnar and / or has a substantially rectangular cross section. Transport device (1) after Claim 9 , wherein the guide body has a through opening in a frame rod of the chassis (5) which is in particular complementary to an outer dimension of the rail (39), the frame rod in particular being located transversely to the direction of displacement of the support (21) and / or the base (17) and / or extends like a bridge over the palletized goods (3). Transport device (1) according to one of the Claims 9 or 10 , wherein the linear guide (23) is provided with a latching device (45) in order to prevent the support (21) from shifting. Transport device (1) after Claim 11 , the latching device (45) defining at least two latching positions, the distance from one another defining a maximum clamping or travel path of the support (21), with the latching device (45) in particular defining several latching positions, in particular evenly distributed in the vertical direction, the travel increments for the support ( 21) define. Transport device (1) after Claim 11 or 12th , the latching device (45) defining at least two latching positions which can be assumed by interlocking latching means (47) attached on the rail side and a latching element (49) on the chassis, such as a particularly spring-preloaded bolt, in order to move the support (21) according to a desired To secure the clamping or travel path against further vertical movement. Transport device (1) after Claim 12 or 13th , wherein the latching means (47) are implemented as recesses in the linear guide (23) and / or the latching element (49) as reversible between an active engagement position and a passive position, in which a displacement of the support (21) relative to the chassis (5 ) is possible, a movable projection, such as, for example, a particularly spring-preloaded bolt, is formed. Transport device (1) according to one of the Claims 2 to 14th , wherein the support (21) is realized as a substantially flat plate and is positioned substantially in the center of a base area of the chassis (5) and / or is arranged on the chassis (5) in such a way that the plate is centered on the palletized goods (3 ) can be applied to exercise the clamping force. Transport device (1) according to one of the preceding claims, wherein the chassis (5) has at least two wheels which are arranged at a distance from one another in such a way that they pass a transport pallet when the transport device (1) rolls and are parallel to one another extending legs are mounted. Transport device (1) according to one of the preceding claims, wherein a railing is connected to the chassis (5) and / or attached to it, which has a rear support and two side supports each connected to the rear wall, so that a receiving space for the pallet goods (3) is formed is, in particular the base (17) and / or the support (21) are / is at least partially retractable into the receiving space and extendable therefrom. Transport device (1) according to one of the Claims 2 to 17th , wherein an in particular manually operable electrical control is provided for the base (17) and / or the support (21), wherein in particular the control has a user interface and / or is set up in such a way that on the basis of a user input or one in a memory of the control stored command for a clamping or travel path the base (17) and / or the support (21) is moved. Transport device (1) according to one of the Claims 2 to 18th wherein the base (17) comprises a tine arrangement of at least two tines with parallel extension for lifting the palletized goods from a transport pallet and for depositing the palletized goods. Method for transporting pallet goods, in which the pallet goods (3) are at least partially clamped from above and below against tilting, the pallet goods (3) having a clamping force of at least 1 N, in particular at least 10 N or at least 20 N, and in particular a maximum of 2,000 N or a maximum of 1,000 N. Procedure according to Claim 20 , which corresponds to a transport device (1) according to one of the Claims 1 to 19th is marked.

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