Lifting device with lifting column and vertically movable lifting carriage

Abstract

Lifting device (10) for a handling and / or palletizing device or the like, which is in particular part of a packaging line, with a lifting column (12) which has a vertical guide (14) for a lifting carriage (22) which is vertically movable by motor on one side of the column (16) via a rolling bearing (18) with at least three rolling elements (20), which lifting carriage has a handling, conveying, stacking and / or gripping element (26), in particular for handling articles, piece goods, containers or the like.carries, wherein the rolling elements (20) are each formed by rollers (28) which are rotatably mounted on the vertically movable lifting carriage (22) about horizontal axes (30), wherein the rollers (28) roll with their respective circumferential sides (34) on guide rails (32) which are anchored to the lifting mechanism column (12) and extend along at least one column side (16) in the vertical direction, wherein the rollers (28) each have profiles (36) on their outer circumferences (34) which correspond to the cross-sectional contours (38) of the guide rails (32), and wherein the lifting carriage (22) is kinematically determined in its suspension by the rolling bearing (18), characterized in that the rollers (28) which form the rolling elements (20) each have outer running surfaces (34) with a V-shaped notched cross-section (40), wherein each roller (28) is provided with its V-shaped notched cross-section (40) rolls on one of the outer edges (42) of the rectangular guide rails (32).

Description

[0001] The present invention relates to a lifting device for a handling and / or palletizing device, with a lifting column which has a vertical guide for a lifting carriage which is vertically movable by a motor on one side of the column via a roller bearing.

[0002] In the field of beverage production, filling, and packaging technology, beverage containers are combined to form bundles consisting of several combined beverage containers. These bundles are then assembled into palletizable bundle layers and stacked layer by layer on pallets. For this purpose, the containers or bundles pass through various conveyor stations. In order to stack or palletize these full-layer bundle layers, there are a variety of devices that are generally known as palletizing devices. Such palletizing devices usually consist of a lifting mechanism and an attached handling device such as a loading station, loading gripper, loading plate, louvered gripper head, or similar. In conventional palletizing devices, the lifting mechanisms consist of at least one lifting mechanism column, which can be formed by a tubular or shaft-shaped column with vertical guides arranged on one side.The hollow space within the tubular or shaft-shaped column provides sufficient space for a counterweight, which is connected by a belt and a driven pulley to the loading station or handling device mounted vertically on one side of the hoist on its guides. These devices focus on rapid lifting movements within a defined range of motion, which should be as precise and trouble-free as possible. Vertically moving hoists are usually driven by electric motors and are typically mounted on roller bearings to ensure smooth vertical movement.

[0003] As an example, DE 200 21 010 U1 is mentioned, which shows a lifting column with a lifting carriage mounted thereon. The lifting column consists of a supporting part and a guide part attached to it in the vertical direction, along which the lifting carriage is guided by means of a plurality of rollers arranged at different levels. The rollers roll on the flat outer surfaces of the supporting part and the guide part, respectively.

[0004] AT 508 172 A1 describes a movable lifting column with a pallet truck. Guide elements are attached to the lifting column, which can be triangular or rectangular in shape. The guide wheels of the pallet truck roll along the flat sides of the column at various angles and heights, depending on the design of the guide elements.

[0005] The subject of DE 74 13 713 U is a lifting column with a pallet truck. Metal bands of varying lengths are attached to the inside and / or outside of the lifting column to dampen the vibrations of the lifting column and pallet truck caused by the movement of the pallet truck.

[0006] AT 57 249 E discloses a dry ash conveying system for a waste incineration furnace, in which a cart is used for the horizontal removal of hot ash. The cart is moved by means of notched wheels on iron angle rails welded to a base plate. The wheels also have a flat surface, allowing the wheel to be moved independently of the rails.

[0007] Similar to the palletizing device just described, the situation is also apparent with a so-called intermediate layer inserter. An intermediate layer inserter is used to insert an intermediate layer, usually made of a flat piece of cardboard, between the individual stacked bundle layers. This intermediate layer inserter is used in alternating sequences, so that an intermediate layer can be placed after each layer of bundles. This intermediate layer inserter is basically constructed almost identically to the previously described palletizing device. However, instead of a loading plate or loading station, a gripper arm or similar handling device is attached, which has suitable gripping means for picking up or grasping intermediate layers at one end.When we talk about "identical construction," this refers to the basic structure, not the other design details, which can, of course, also differ in size. The interlayer inserter usually has the same components, such as a tubular or shaft-shaped column, guides, counterweight, welded or bolted base plate, motor drive, belt or toothed belt, connecting lines (pneumatic, electric), and a handling device.

[0008] Both devices also require smooth-running and trouble-free rolling bearings or rolling pairs for the vertical mobility of the lifting carriage or the handling and / or palletizing devices over the longest possible operating period.

[0009] These rolling pairs have occasionally presented problems in practice because, on the one hand, they require very precise installation and relatively complex adjustment. Nevertheless, bearing failures frequently occur, which can lead to high maintenance costs.

[0010] A primary aim of the present invention is therefore to provide a lifting device, e.g. for a palletizing and / or intermediate layer insertion device or also for partially or fully automatic packing and / or sorting machines, which comprises a lifting column with a vertically movable lifting carriage which is connected to the lifting column via a vertical suspension and guide which is as simple and stable as possible, is easy to move and works as robustly and smoothly as possible.

[0011] This object is achieved with the subject matter of independent claim 1. Features of advantageous developments of the invention can be found in the dependent claims. To achieve this object, the invention proposes a lifting device with the features of claim 1 for a handling and / or palletizing device or the like, which can in particular be part of a packaging line. The lifting device according to the invention comprises, as an essential support element, a lifting column which has a vertical guide for a lifting carriage which is vertically movable by a motor on one side of the column via a rolling bearing with at least three rolling elements and which carries a handling, conveying, stacking and / or gripping element, in particular for handling articles, piece goods, containers or the like. The rolling elements are each formed by rollers which are mounted on the vertically movable lifting carriage so as to be rotatable about horizontal axes.The rollers roll with their respective circumferential sides on guide rails that are anchored to the lifting mechanism column and extend vertically along at least one column side. According to the invention, the rollers each have profiles on their outer circumferences that correspond to the cross-sectional contours of the guide rails. Furthermore, the lifting carriage is kinematically determined by the roller bearing in its suspension. Both the rollers that form the rolling elements and the guide rails on which the rollers roll are preferably made of metal, in particular steel, resulting in a stable and low-wear rolling and friction pairing that delivers the desired operating characteristics for trouble-free continuous operation.

[0012] It should be noted that the present invention is described below by way of example using a palletizing device. However, this should not be understood as limiting the invention to a palletizing device only. The invention is equally applicable to any device that has the same or approximately the same basic structure as a palletizing device described below. Thus, the invention is also applicable to an intermediate layer inserter that has the same basic structures or components.

[0013] The lifting device according to the invention with the supporting lifting column can comprise a rolling bearing with at least four rolling elements, each formed by rollers, and preferably at least two guide rails, wherein two rolling elements each interact with a guide rail to form a rolling pair. In order to be able to securely support and vertically guide the lifting carriage, two rollers of the rolling bearing are expediently rotatably mounted on the lifting carriage at a common horizontal height level. Furthermore, for a suspension and guidance of the lifting carriage that can be subjected to high loads, it is expedient if the at least one upper roller is supported on the rear of the lifting carriage against one of the at least two guide rails. It is also expedient if the at least one lower roller is supported on the front of the lifting carriage against one of the at least two guide rails.

[0014] Since at least two rollers are normally used for the upper guide and two further rollers for the lower guide, it is advisable for the two lower rollers, which are arranged at a common first height level and at a horizontal distance from one another, to be supported at the front with respect to the lifting carriage on the two parallel, vertically aligned guide rails, and for the two upper rollers, which are arranged at a common second height level above the first height level with the lower rollers and at a horizontal distance from one another, to be supported at the rear with respect to the lifting carriage on the two guide rails. These rear and front guides of the respective roller pairs ensure optimal load support for the lifting carriage, which can accommodate high loads.At the same time, the rollers in conjunction with the guide rails ensure a low-wear and resilient rolling bearing of the vertically adjustable lifting carriage, so that the above-mentioned aim of the invention can be implemented in an optimal manner.

[0015] The guide rails can in particular each be formed by steel strips with a rectangular cross-section, which are also preferably anchored to the lifting column over a large area and / or via a plurality of fixing points, so that they are as far as possible not subject to any elastic deformation, even when the lifting carriage is subjected to a high load.

[0016] In the inventive design of the lifting device or lifting column, the rollers which form the rolling elements each have outer running surfaces with a V-shaped notched cross-section. These notches in the outer running surface of the rollers can in particular be formed by 90° notches in the cross-section, which allow the rollers to roll almost positively on the correspondingly contoured guide rails. According to the invention, each roller rolls with its V-shaped notched cross-section on one of the outer edges of the rectangular guide rails. Since the guide rails also preferably have edges with a 90° cross-section, the correspondingly notched rollers can each rest on and roll there, thereby providing not only longitudinal guidance for the rollers, but also transverse guidance which forces the rollers into a precise vertical path and which is capable of absorbing relatively high transverse forces which, for example,This can occur due to uneven or changing loads on the lifting carriage, or particularly due to a transversely projecting lifting carriage. Since the lifting carriage, depending on its design, may have a crossbeam with a relatively wide cantilever area, uneven transverse forces can act on the rolling bearings of the lifting carriage. These forces can be ideally absorbed by the roller design, which is adapted to the contours of the guide rails.

[0017] Some of the rollers may be lubricated to increase long-term stability and reduce wear on the rolling pairs. Preferably, at least the upper rollers are permanently or permanently lubricated with a friction-reducing lubricant, so that the lower rollers can be supplied with distributed lubricant. Such lubrication of the rolling pairs is useful for many materials used, especially for the preferred steel pairings of the rollers and guide rails.

[0018] It should be noted at this point that, in addition to the lifting device described above in various embodiments, the present invention also comprises a lifting column with a vertically guided and motor-driven lifting carriage, in which the vertically movable lifting carriage is held and guided on guide rails via a rolling bearing with at least three rolling elements formed by rollers. This lifting column is, in particular, part of a lifting device according to the embodiment described above.

[0019] In the following, exemplary embodiments will explain the invention and its advantages in more detail with reference to the accompanying figures. The relative sizes of the individual elements in the figures do not always correspond to the actual sizes, as some shapes are simplified and others are enlarged relative to other elements for better illustration. Fig. 1 shows a schematic side view of a part of the lifting device according to the invention. Fig. 2 shows a perspective detailed view of the lifting device according to Fig. 1. Fig. 3 shows a further perspective detailed view of the lifting device according to Fig. 1. Fig. 4 shows a detailed view of a rolling pair which is part of a vertical guide of the lifting device according to Fig. 1 is. Fig. 5 shows a schematic plan view of a part of the lifting device according to Fig. 1. Fig. 6 shows a further perspective detailed view of the lifting device according to Fig. 1.

[0020] Identical reference numerals are used for identical or equivalently functioning elements of the invention. Furthermore, for the sake of clarity, only reference numerals necessary for the description of the respective figure are shown in the individual figures. The illustrated embodiments merely represent examples of how the lifting device according to the invention can be configured and do not represent a definitive limitation.

[0021] The Fig. 1 to 6 show various schematic detailed views of the lifting device 10 according to the invention, which can in particular be a component of a packaging line not shown in detail here. Within this packaging line, the lifting device 10 can be arranged as part of a handling and / or palletizing device. The essential task of this lifting device 10, in conjunction with such a packaging line, is to lift, pick up, and / or set down piece goods, in particular stackable layers of piece goods, or also to handle intermediate layers or similar flat objects that can, for example, be inserted between stacked layers of piece goods.The lifting device 10, shown only in part, comprises as an essential support element a lifting column 12 which has a vertical guide 14 for a lifting carriage 22 which is vertically movable by motor on one side 16 of the column via a roller bearing 18 with at least three rolling elements 20 and which can carry a handling, conveying, stacking and / or gripping element, in particular for handling articles, piece goods, containers or the like. In the exemplary embodiment shown, the . Fig. 1 to 3, 5, and 6, a handling element 26 projecting horizontally from the front column side 16 is anchored to the lifting carriage 22, which is vertically adjustable in the direction of arrow 24. This handling element 26 can be formed, for example, by a louvre gripper head, a vertically adjustable transfer surface, or the like. The handling element 26 can optionally also be formed by a suitable gripping device for receiving and handling flat intermediate layers or other elements.

[0022] The rolling elements 20, which connect the lifting carriage 22 to the lifting column 12 in a vertically adjustable manner in the direction of arrow 24, are each formed by rollers 28, which are mounted on the vertically movable lifting carriage 22 so as to be rotatable about horizontal axes 30. As can be seen in particular from the detailed view of the Fig. 1, the rollers 28 are rotatably mounted on the lifting carriage 22, wherein the rotation axes 30 are each aligned horizontally, so that the rollers 28 each rotate within vertical planes (not shown).

[0023] The four rollers 28 roll with their respective circumferential sides on two guide rails 32, which are anchored to the lifting column 12 and extend vertically along the front column side 16. The two guide rails 32 are located on the lateral vertical edges of the front column side 16, so that each guide rail 32 can serve as a sliding guide for two rollers 28. As the detailed top view of the Fig. 4 with the rolling bearing 18 and an exemplary rolling element 20, the rollers 28 each have profiles 36 on their outer circumferences 34, which correspond to the rectangular cross-sectional contours 38 of the guide rails 32. The Fig. Figure 4 also reveals the special design of the outer running surfaces 34 of the rollers 28, which in the illustrated embodiment provide a V-shaped notched cross-section. These notches 40 in the outer running surface 34 of the rollers 28 have a flank angle of approximately 90° according to the illustrated embodiment, so that, in conjunction with the rectangular cross-sections 38 of the guide rails 32, an almost positive rolling of the rollers 28 on the correspondingly contoured guide rails 32 is ensured. Thus, each roller 28, with its V-shaped notched cross-section 40, rolls precisely on one of the outer edges 42 of the rectangular guide rail 32.Since the guide rails 32 each have edges 42 with a 90° angle, the correspondingly notched rollers 28 can each sit on and roll there, whereby not only a longitudinal guide for the rollers 28, but equally a transverse guide is provided, which forces the rollers 28 into an exact vertical path and which is able to absorb relatively high transverse forces, which are caused, for example, by an uneven or changing load on the lifting carriage 22 or in particular by a transversely projecting handling device 26 which is attached to the lifting carriage 22 (cf. Fig. 1 and Fig. 3). Since the lifting carriage 22, depending on its design, can have a crossbeam with a relatively wide boom range, uneven transverse forces can act on the roller bearing 18 of the lifting carriage 22, which can be ideally absorbed by the roller design, to which the contours of the guide rails 32 are adapted.

[0024] As the detailed view of the Fig. 4, the vertical outer edges 42 of the guide rails 32 can each have a chamfer, which can correspond in particular to a corresponding basic contour of the V-shaped notched cross-section 40 of the roller running surface 34, which is easier to realize in terms of manufacturing technology than an exactly V-shaped contour of the roller running surface 34 with a pointed notch base. Both the rollers 28, which form the rolling elements 20, and the guide rails 32, on which the rollers 28 roll and together with them form the rolling bearing 18, are preferably made of metal, in particular steel, so that a stable and low-wear rolling and friction pairing is produced, which can provide the desired operating properties for trouble-free continuous operation. The guide rails 32 can also preferably be anchored to the lifting column 12 over a large area and / or via a plurality of fixing points or screw connections 52 (cf. Fig. 6) so that they are not subject to any elastic deformation, even when the lifting carriage 22 is subjected to a high load.

[0025] As the schematic and perspective detail views of the Fig. 2 and Fig. 3, the lifting carriage 22 is kinematically determined and clearly defined by the roller bearing 18 in its suspension and vertical guide 14 as well as the vertical mobility in the lifting direction 24. The lifting device 10 shown as an example with the supporting lifting column 12 comprises a roller bearing 18 with a total of four rolling elements 20 each formed by rollers 28 and two vertically extending, parallel to the front column side 16 (not visible in the Fig. 2 and Fig. 3) arranged guide rails 32, wherein two rolling elements 20 or rollers 28 cooperate with one of the two guide rails 32 to form the respective rolling pair. In order to securely support and vertically guide the lifting carriage 22, two rollers 28 of the rolling bearing 18 are rotatably mounted on a common horizontal height level 44 or 46 on the lifting carriage 22. This first height level 44 of the two lower rollers 28 and the second height level 46 of the two upper rollers 28 of the rolling bearing 18 are in the Fig. 1 and Fig. 2 are each indicated by broken lines, each of which is at the same level as the rotation axes 30 of the rollers 28.

[0026] The perspective view of the Fig. 2 only reveals the right side surface 48 of the lifting mechanism column 12, while the front column side 16, on which the lifting carriage 22 is raised and lowered in the vertical direction of movement 24, is concealed. However, as this view clearly shows, the upper rollers 28 of the upper second height level 46 are supported on the rear of the lifting carriage 22 on the respective guide rails 32, which is useful for the suspension and guidance of the lifting carriage 22, which can be subjected to high loads, while the two lower rollers 28 of the lower first height level 44 are supported on the front of the lifting carriage 22 on the two guide rails 32. This means that each of the four rollers 28 of the roller bearing 18 runs on its own outer edges 42 of the guide rails 32, which have a rectangular cross-section 38 (cf. Fig. 4). Of each of the two guide rails 32, only the two outer edges 42 with respect to the front column side 16 serve as running surfaces for the rollers 28 rolling thereon, while the respective inner edges 42 are not used as running or supporting surfaces or edges.

[0027] Due to the arrangement of the rollers 28 on the lifting carriage 22 in relation to the adjacent vertical edges 42 of each guide rail 32, their axes of rotation 30 are oriented exactly at right angles 50 to each other, although it should be noted that the top view of the Fig. 5, in which this angle 50 is indicated, does not reveal the vertical distance between the height levels 44 and 46, at which the respective axes 30 are located. This top view of the vertical guide 14 of the lifting carriage 22 particularly clearly shows the play-free suspension of the lifting carriage 22, which is suitable for high vertical and transverse loads in all conceivable directions.Since two rollers 28 are used for the upper guide and two further rollers 28 for the lower guide, it is advisable if they support the two lower rollers 28, which are arranged at a common first height level 44 and at a horizontal distance from one another, on the front with respect to the lifting carriage 22 on the edges 42 of the two parallel, vertically aligned guide rails 32, and if the two upper rollers 28, which are arranged at a common second height level 46, which is arranged above the first height level 44 with the lower rollers 28, and at a horizontal distance from one another, are supported on the rear of the two guide rails 32 with respect to the lifting carriage 22. These rear and front guides of the respective roller pairs ensure optimal load support of the lifting carriage 22, which can be subjected to high loads.At the same time, the rollers 28 in conjunction with the guide rails 32 ensure a low-wear and resilient rolling bearing 18 of the vertically adjustable lifting carriage 22.

[0028] Optionally, the rollers 28 can be lubricated to increase long-term stability and reduce wear on the rolling pairs. Preferably, at least the upper rollers 28 are provided with a permanent or loss lubrication system 54 with a friction-reducing lubricant, so that the lower rollers 28 can be supplied with distributed lubricant. Such lubrication of the rolling pairs is useful for many materials used, particularly for the preferably used steel pairs of the rollers 28 and the guide rails 32. Such loss lubrication 54 of the upper rollers 28 is described in the Fig. 1 to 3. A small lubricant reservoir is located above the rollers 28, which can ensure the desired lubrication of the roller 28 through regular lubricant release, e.g., through a dropper, a sponge resting on the roller 28, or the like. The vertical movements 24 of the lifting carriage 22, with the associated rotation of the rollers 28 about their respective axes of rotation 30, then ensure the desired distribution of the lubricant over the roller running surface 34 onto the edges 42 of the guide rails 32 supporting the rollers 28.In the illustrated embodiment, only the two upper rollers 28 are equipped with such a loss lubrication system 54, while it can be assumed that the lower rollers 28 and the edges 42 of the guide rails supporting them are also supplied by the continuous vertical movements 24 of the lifting carriage 22 and the resulting distribution of the lubricant over the entire length of the guide rails 32. If necessary, the two lower rollers 28 can also be equipped with separate loss lubrication systems 54 and associated lubricant reservoirs.

[0029] Another optional feature is a safety device 56, by which the vertical movement 24 of the lifting carriage 22, together with the handling element 26 anchored thereto and projecting forward, can be blocked if necessary. This safety device 56 is shown in the illustration of the Fig. 2. It comprises a perforated rail 58 anchored laterally to the lifting column 12 with regularly spaced recesses 60 into which a motor-driven bolt 62 can be moved horizontally, the drive of which is fixed to a lateral extension plate 64 or retaining plate of the lifting carriage 22. Upon activation of the bolt 62, which engages in one of the recesses 60, a load-induced vertical lowering of the lifting carriage 22 and the handling element 26, as well as any load located thereon, is excluded. Such an undesirable lowering could occur, for example, in the event of a failure of the motor-driven vertical drive for the lifting carriage 22 or, for example, in the event of a failure of a belt or chain establishing the pulling connection, which, however, can be reliably prevented by the safety device 56. The perforated rail 58 with the recesses 60 is also shown in the illustration of the Fig. 6 recognizable.

[0030] Especially the Fig. 3, Fig. 5 and Fig. 6 also show a cross member 68 which is displaceable on the lifting carriage 22 in the horizontal direction and transversely to the lifting and lowering direction 24 of the lifting carriage 22 in the direction of arrow 66 and which is connected to the lifting carriage 22 via a further roller guide 70 which allows movements in the horizontal direction transversely to the vertical longitudinal direction of the column axis of the lifting mechanism column 12. The roller guide 70 comprises at least one horizontal cross rail 72 at the upper edge of the lifting carriage 22, on which at least two rollers 74 of the roller guide 70 of the cross member 68 are guided. These rollers 74 can expediently be designed and dimensioned in the same way as the rollers 28 of the vertical guide 14, i.e. with a V-shaped notch in the running surface, etc. (cf. Fig. 5). The arrangement of the crossbeam 68, its mobility 66 in the horizontal direction, and the wide projection of the handling device 26 make the special loads and the potentially strongly changing load directions that can act on the vertical guide 14 on the lifting column 12 plausible, so that the special advantages of this vertical guide 14 according to the illustrated embodiment with the four rollers 28 of the roller bearing 20 and the rails 32 supporting and guiding the rollers 28 could be clarified.

[0031] Only in Fig. 6, lower support rollers 76 of the roller guide 70 of the cross member 68 are visible, which roll on a horizontally aligned guide rail with a vertical running surface 78 arranged on the lifting carriage 22. The two lower support rollers 76 thus have vertically aligned axes of rotation. Depending on the width of the cross member 68, it may be useful to provide several such support rollers 76 or pairs of support rollers 76, which are preferably arranged at a sufficient horizontal distance from one another. As the Fig. 3, Fig. 5 and Fig. 6, the upper rollers 74 of the roller guide 70 must hold the cross member 68 and guide it in several load directions, while the lower support rollers 76 only have to be supported on the running surfaces 78, since the load direction does not change.

[0032] It should be noted that the present invention has been described above using a palletizing device as an example. However, this should not be understood as limiting the invention to a palletizing device only. The invention is equally applicable to any device that has the same or approximately the same basic structure as a previously described palletizing device. Thus, the invention is also applicable to an intermediate layer inserter or similar handling device that may have the same basic structures or components.

[0033] The invention has been described with reference to a preferred embodiment. However, it is conceivable to a person skilled in the art that modifications or variations of the invention can be made without departing from the scope of the following claims. List of reference symbols 10 Lifting device 12 lifting column 14 Vertical guide 16 Column side, front column side 18 Rolling bearings 20 rolling element 22 lifting carriages 24 vertical movement direction, vertical movement possibility (of the lifting carriage), lifting direction 26 Handling element, handling device, handling, conveying, stacking and / or gripping element 28 rolls 30 axis, horizontal axis of rotation (of the roller) 32 guide rail 34 Outer circumference (of the roller), outer running surface (of the roller), roller running surface, circumferential sides 36 Profiling (of the roll or its outer circumference) 38 Cross-sectional contour, rectangular cross-sectional contour (of the guide rail), rectangular cross-section 40 Notch, notched cross-section (of the roller running surface) 42 Edge, outer edge, vertical edge (of the guide rail) 44 first height level (of the lower rollers) 46 second height level (of the upper rollers) 48 right side surface (of the lifting column), right column side 50 Alignment of the rollers to each other, right angle (of the rollers of a guide rail) 52 Fixation, screw connection, fixation point 54 Lubrication, loss lubrication, permanent or loss lubrication 56 Safety device 58 safety rail, rail, perforated rail 60 recess 62 bolts, locking bolts 64 boom plate, retaining plate 66 horizontal movement direction, horizontal movement possibility (of the crossbeam) 68 Crossbeam 70 roller guide 72 Cross rail 74 roll 76 support roller 78 tread

Claims

[1] Lifting device (10) for a handling and / or palletising device or the like, which is in particular part of a packaging line, with a lifting column (12) which has a vertical guide (14) for a lifting carriage (22) which is vertically movable by motor on one side of the column (16) via a rolling bearing (18) with at least three rolling elements (20), which has a handling, conveying, stacking and / or gripping element (26), in particular for handling articles, piece goods, containers or the like.carries, wherein the rolling elements (20) are each formed by rollers (28) which are mounted on the vertically movable lifting carriage (22) so as to be rotatable about horizontal axes (30), wherein the rollers (28) roll with their respective circumferential sides (34) on guide rails (32) which are anchored to the lifting mechanism column (12) and extend along at least one column side (16) in the vertical direction, wherein the rollers (28) each have profiles (36) on their outer circumferences (34) which correspond to the cross-sectional contours (38) of the guide rails (32), and wherein the lifting carriage (22) is kinematically determined in its suspension by the rolling bearing (18), . characterized by that the rollers (28) forming the rolling elements (20) each have outer running surfaces (34) with a V-shaped notched cross-section (40), each roller (28) rolling with its V-shaped notched cross-section (40) on one of the outer edges (42) of the rectangular guide rails (32). [2] Lifting device according to claim 1, wherein the rolling bearing (18) comprises at least four rolling elements (20) and at least two guide rails (32), wherein two rolling elements (20) each interact with a guide rail (32) to form a rolling pair. [3] Lifting device according to claim 2, in which two rollers (28) are rotatably mounted on the lifting carriage (22) at a common horizontal height level (44, 46). [4] Lifting device according to one of claims 1 to 3, in which at least one upper roller (28) is supported on the rear side of one of the at least two guide rails (32) with respect to the lifting carriage (22). [5] Lifting device according to one of claims 1 to 4, in which at least one lower roller (28) is supported on the front side on one of the at least two guide rails (32) with respect to the lifting carriage (22). [6] Lifting device according to claim 4 or 5, in which the two lower rollers (28) arranged at a common first height level (44) and at a horizontal distance from one another are supported on the front side on the two guide rails (32) with respect to the lifting carriage (22), and in which the two upper rollers (28) arranged at a common second height level (46) which is arranged above the first height level (44) with the lower rollers (28) and at a horizontal distance from one another are supported on the rear side on the two guide rails (32) with respect to the lifting carriage (22). [7] Lifting device according to one of claims 1 to 6, wherein the guide rails (32) are each formed by steel strips with a rectangular cross-section (38). [8] Lifting device according to one of claims 1 to 7, in which at least the upper rollers (28) are assigned a permanent or loss lubrication (54) with a friction-reducing lubricant. [9] Lifting mechanism column (12) with a lifting carriage (22) which is vertically guided thereon and is movable by motor and which is held and guided on guide rails (32) via a rolling bearing (18) with at least three rolling elements (20) formed by rollers (28), wherein the lifting mechanism column (12) is part of a lifting device (10) according to one of claims 1 to 8.

Images