Lifting device for scaffolding with a swivel arm

Abstract

Lifting device with a pivot arm (100), wherein the pivot arm (100) has at least two fastening devices (28, 32) for fastening pivotably about a vertical axis to a vertical scaffolding component (34) of a building scaffold, in particular a leading scaffold, wherein the lifting device is in an operating position when all fastening devices (28, 32) are fastened to the vertical scaffolding component (34) of a building scaffold, characterized in that at least a first fastening device (28) is designed as a hook-shaped fastening device, with a shaft (281), a first end (285) on the shaft (281), which is connected to the pivot arm (100), and with a second free end orwith a tip (283) which is spaced from the pivot arm (100) and is arranged on an arcuate segment (282) of the hook-shaped fastening devices (28), so that an opening (284) for inserting the vertical scaffolding component (34) is formed between the first end (285) of the shaft (281) and the tip (283) of the arcuate segment (282) of the hook-shaped fastening device (28).

Description

[0001] The invention relates to a lifting device with a pivoting arm, wherein the pivoting arm has at least two fastening devices for pivoting about a vertical axis to a vertical scaffolding component of a building scaffold, in particular a leading scaffold, wherein the lifting device is in an operating position when all fastening devices are fastened to the vertical scaffolding component of a building scaffold, according to the preamble of patent claim 1.

[0002] Up to now it has been usual to pull up the scaffolding sections using a swivel arm and an attached winch when erecting scaffolding. The swivel arm is attached to the scaffolding that has already been erected. The swivel arm is shaped like a triangle and transmits the force into the scaffolding at two attachment points. These attachment points are either both implemented with clamps running around the scaffolding pole or at the bottom with a circumferential clamp and at the top with a closed tube attached to the scaffolding tube that is open at the top. The latter has the particular disadvantage that the scaffolding tube must be open at the top. When one level of the scaffolding is finished, the swivel arm has to be removed and reattached one level higher. With conventional swivel arms this is time-consuming and labor-intensive and usually requires at least two operators.Depending on the type of scaffolding, a pipe in front of it is necessary to attach the swivel arm, which must also be attached to the scaffolding.

[0003] Due to new scaffolding regulations and modified scaffolding designs, conventional lifting devices are more difficult to operate, particularly due to the additional fall protection required, which makes it almost impossible to reconstruct the swivel arm from level to level.

[0004] DE 38 06 599 C1 discloses a building crane comprising a swivel arm supporting a motor winch with swivel bearings that allow the swivel arm to be mounted at lifting height on a swivel bracket on the building or scaffold. The swivel arm is equipped with rollers in its upper section, and a rail-like guide beam is attached to the swivel arm, which is equipped with fastening devices for optional connection to scaffold tubes or to associated portal supports.

[0005] DE 692 48 53 U discloses a fastening device for the boom of a construction hoist to a scaffolding support. With such a device, the boom of a construction hoist is to be fastened to a scaffolding support used during construction, e.g. a pipe, pole or ladder scaffold, or to a pipe support between two storeys. In this case, two holes are provided at an inner end of the boom, offset in height, through which two holding hooks engage. One end of the holes has a screw thread with a toggle and the other end is bent over to form a hook that partially encloses the scaffolding support. However, this has the disadvantage that the boom cannot be pivoted relative to the scaffolding in the assembled position and, moreover, the entire boom must be manually secured against falling until both toggles are tightened. Therefore, at least two operators are required to assemble the boom and to move it to another location on the scaffold.

[0006] The invention is based on the object of adapting a lifting device of the above-mentioned type to scaffoldings and new scaffolding construction methods that have been modified due to new scaffolding regulations.

[0007] This object is achieved according to the invention by a lifting device of the above-mentioned type having the features characterized in claim 1. Advantageous embodiments of the invention are described in the further claims.

[0008] For this purpose, in a lifting device of the above-mentioned type, it is provided according to the invention that at least one first fastening device is designed as a hook-shaped fastening device, with a shaft, a first end on the shaft which is connected to the pivot arm, and with a second free end or with a tip which is spaced from the pivot arm and is arranged on an arcuate segment of the hook-shaped fastening devices, so that an opening for inserting the vertical scaffolding component is formed between the first end of the shaft and the tip of the arcuate segment of the hook-shaped fastening device.

[0009] This has the advantage that, for installation, the lifting device can first be temporarily suspended from the scaffolding using the hook-shaped fastening device, thereby preventing it from accidentally falling. This allows the remaining fastening devices to be attached to the scaffolding without having to manually secure the lifting device to prevent it from falling. Dismantling the lifting device and relocating it to another location on the scaffolding, for example, one level higher once the current level of the scaffolding has been fully assembled, can also be done very quickly and by a single operator, significantly reducing the risk of accidents during this conversion.

[0010] Simple assembly by a single operator is achieved by arranging the hook-shaped fastening device above at least one second fastening device in the direction of gravity. This has the advantage that the swivel arm is simply hooked onto the vertical scaffolding component of the scaffolding, thus preventing the swivel arm from falling due to gravity, which prevents the second fastening device(s) from being connected to the vertical scaffolding component.

[0011] A particularly functionally reliable fastening of the lifting device to the vertical scaffolding component is achieved in that the at least one second fastening device has a first fastening clamp with a tensioning screw, wherein the first fastening clamp, when fastened to the vertical scaffolding component of the scaffolding, completely encompasses the vertical scaffolding component.

[0012] Particularly simple assembly and release of the swivel arm is achieved by the fact that the first fastening clamp is designed as a clamp or tension clamp, with a clamp body, a tensioning screw and a tensioning nut, in particular a wing nut.

[0013] A simple and safe pivoting of the pivot arm about a vertical axis in the operating position of the lifting device is achieved in that the at least one second fastening device has a pivot bearing on which the pivot arm is supported in the direction of gravity.

[0014] A particularly functionally reliable embodiment with regard to pivotability is achieved by the pivot bearing being U-shaped and the first fastening clamp being arranged below the pivot bearing in the direction of gravity.

[0015] A particularly high load capacity and a simple pivoting function even with high loads are achieved in that the pivot bearing is formed from at least two superimposed, interconnected, U-shaped components, wherein a receiving space for receiving one end of the pivot arm is formed between the U-shaped components, and wherein the U-shaped component lying at the bottom in the direction of gravity has a support surface made of a sliding material on a surface facing the receiving space.

[0016] An additional fastening of the lifting device to the vertical scaffolding component with a function for adjusting a force counteracting the pivoting movement is achieved in that a second fastening clamp is arranged on the pivot arm in the direction of gravity above and adjacent to the second fastening device, wherein the second fastening clamp has a tensioning screw, wherein the second fastening clamp, when fastened to the vertical scaffolding component of the scaffolding, completely encompasses the vertical scaffolding component.

[0017] A particularly simple and functionally reliable adjustment of a force counteracting the pivoting movement is achieved by designing the second fastening clamp as a clamp or tensioning clamp, with a clamp body, a tensioning screw and a tensioning nut, in particular a wing nut.

[0018] A safeguard against unintentional detachment of the swivel arm from the vertical scaffolding component in an operating position of the lifting device is achieved in that a locking element is arranged and designed at the free second end of the hook-shaped fastening device in such a way that the hook-shaped fastening device can only be released from the vertical scaffolding component when the swivel arm is pivoted about a first horizontal pivot axis and / or tilted about a second horizontal axis relative to the vertical scaffolding component from the operating position of the lifting device.

[0019] Particularly effective protection against unintentional detachment of the hook-shaped fastening device from the vertical scaffolding element in the operating position of the lifting device is achieved in that the locking element rises from a plane of the hook-shaped fastening device and extends so far that a projection of the locking element into the plane of the hook-shaped fastening device at least partially covers the opening between the first and second ends of the hook-shaped fastening device. This arrangement and design of the locking element creates a spatial engagement around the vertical scaffolding element while simultaneously maintaining an opening for detachment from the vertical scaffolding element, whereby for this purpose the pivot arm must be tilted into a very specific position relative to the vertical scaffolding element.

[0020] A cable winch is attached to the swivel arm for lifting loads.

[0021] A particularly good introduction of force from the swivel arm into the vertical scaffolding element is achieved in that the swivel arm has a main beam, a boom and a support element, wherein the main beam and the boom are connected to one another at a first connection point at a predetermined angle and wherein the support element is connected to the main beam at a second connection point spaced from the predetermined angle and to the boom at a third predetermined point spaced from the predetermined angle, so that the support element, a section of the main beam and a section of the boom form a triangle.

[0022] A particularly stable construction is achieved by forming an angle of 90 degrees at the third connection point between the boom and the support element.

[0023] A particularly stable force triangle for transferring forces from the boom into the vertical scaffolding component or into the scaffolding is achieved in that the hook-shaped fastening device is arranged on a free end of the boom facing away from the first connection point or on a free end of the main beam facing away from the first connection point; and / or in that the second fastening device is arranged on a free end of the main beam facing away from the first connection point or on a free end of the boom facing away from the first connection point; and / or in that the second fastening clamp is arranged adjacent to a free end of the main beam or the boom facing away from the first connection point.

[0024] The invention is explained in more detail below with reference to the drawing, which shows Fig. 1 a preferred embodiment of a lifting device according to the invention in a perspective view; Fig. 2 the preferred embodiment of a lifting device according to the invention in a further perspective view; Fig. 3 the preferred embodiment of a lifting device according to the invention in an operating position in a side view; Fig. 4 shows a first fastening device of the preferred embodiment of a lifting device according to the invention in a perspective view in the state suspended from a vertical scaffolding component; Fig. 5 shows a second fastening device of the preferred embodiment of a lifting device according to the invention in a state fastened to a vertical scaffolding component in a perspective view; Fig. 6 a pivot bearing for the second fastening device according to Fig. 5 of the preferred embodiment of a lifting device according to the invention in a perspective view; Fig. 7 the swivel bearing according to Fig. 6 for the second fastening device according to Fig. 5 of the preferred embodiment of a lifting device according to the invention in a perspective view from a different angle; Fig. 8 shows a perspective view of the preferred embodiment of a lifting device according to the invention in an operating position; Fig. 9 the preferred embodiment of a lifting device according to the invention in an operating position, as in Fig. 8, in an enlarged perspective view; and Fig. 10 a boom with main support of the preferred embodiment of a lifting device according to the invention in a perspective partial view.

[0025] In the figures, an arrow 58 indicates a direction of gravity.

[0026] The Fig. A preferred embodiment of a lifting device according to the invention, as shown in Figures 1 to 3, comprises a pivot arm 100, wherein the pivot arm 100 is composed of a main beam 10, a boom 12, and a support element 14 connecting the boom 12 to the main beam 10. The main beam 10 and the boom 12 are connected to one another at a first connection point 16 at a predetermined angle 18. The support element 14 is connected to the main beam 10 at a second connection point 20 and to the boom 12 at a third connection point 22, such that the support element 14, a section of the main beam 10, and a section of the boom 12 form a triangle. In the present embodiment, this is a right-angled triangle, with the right angle 24 formed at the third connection point 22.

[0027] A first fastening device 28 is arranged at a free end 26 of the boom 12, remote from the first connection point 16. A second fastening device 32 is arranged at a free end 30 of the main support 10, remote from the first connection point 16. The free end 26 of the boom 12 is also spaced from the third fastening point 22, and the free end 30 of the main support 10 is also spaced from the second fastening point 20.

[0028] As can be seen from the Fig. 1 to 4, the first fastening device 28 is designed as a hook-shaped fastening device with an arcuate segment 282, a first free end or a shaft 281 and a second free end or a tip 283, wherein an opening 284 is formed between the tip 283 and the shaft 281. This opening is dimensioned such that a vertical scaffolding component 34 ( Fig. 3 and Fig. 4) so ​​that the hook of the first fastening device 28 can be hooked onto this vertical scaffolding component 34. The shaft 281 has a first end 285 of the hook of the first fastening device 28 at an end spaced from the arcuate segment 282 and is connected by this first end 285 to the free end 26 of the boom 12.

[0029] The first fastening device 28 additionally has a locking element 36 at the tip 283 of the arcuate segment 282, which extends from a two-dimensional plane of the hook-shaped fastening device 28 into the three-dimensional space. The locking element 36 is designed and arranged such that, as can be seen from Fig. 4, a projection 361 of the locking element 36 into the plane of the hook-shaped fastening device 28 partially covers the opening 284. In this way, the hook-shaped fastening device 28 can only be released from the vertical scaffolding component 34 if the pivot arm 100 is tilted into a specific position relative to the vertical scaffolding component 34, whereby this position can only be assumed manually and against the force of gravity (direction of gravity: arrow 58) by the pivot arm 100. In this way, once a hook-shaped fastening device 28 has been suspended from the vertical scaffolding component 34, it cannot release itself automatically, provided that only gravity (direction of gravity: arrow 58) acts on the pivot arm. This is independent of whether a second fastening device 32 is already connected to the vertical scaffolding component 34 or not. As can be seen directly from Fig. 4, in the illustrated embodiment, detachment of the hook-shaped fastening device 28 from the vertical scaffolding component 34 is only possible if the pivot arm 100 is tilted against gravity (direction of gravity: arrow 58) such that the boom 12 is arranged almost parallel to the vertical scaffolding component 34. Only then does the locking element 36 release the opening 284 such that the vertical scaffolding component 34 can be guided through the opening 284 and the hook-shaped fastening device 28 can be detachable from the vertical scaffolding component 34.

[0030] According to the invention, the first hook-shaped fastening device 28 is designed only for hanging and not for tightening or clamping to the vertical scaffolding component 34. In other words, a distance between the arcuate segment 282 and the first end 285 of the hook is fixed and cannot be changed. This distance is determined solely by the design of the shaft 281 and the arcuate segment 282. A screw clamp-like device for changing this distance is not provided. As a result, the hook-shaped fastening device 28 suspended from the vertical scaffolding component 34 remains movable relative to the vertical scaffolding component 34.In this way, at this point of the connection of the lifting device to the vertical scaffolding component 34, a degree of freedom for a pivoting movement of the pivot arm 100 relative to the scaffolding is maintained, while at the same time securing against an undesired, automatic release of this connection between the pivot arm 100 and the vertical scaffolding component 34 in the area of ​​the first hook-shaped fastening device 28 solely due to the effect of gravity (direction of gravity: arrow 58), even if the scaffolding vibrates, oscillates or moves in any other way, for example due to the influence of wind, due to people walking on the scaffolding, during an earthquake or due to a machine running on the scaffolding.

[0031] This allows the lifting device to be relocated and installed at a different location on the scaffold, for example, one level higher, by a single operator. Furthermore, this relocation can be carried out easily and reliably by a single operator, even if additional attachments, such as a railing or other fall protection devices, are mounted on the scaffold that make access to the area outside the scaffold difficult for the operator.

[0032] Starting with the lifting device in the operating position, the operator releases the second fastening device(s) 32 from the vertical scaffolding component 34, but leaves the first hook-shaped fastening device 28 hooked onto the vertical scaffolding component 34. The operator can now release the swivel arm 100, as it remains securely attached to the vertical scaffolding component 34 solely under the influence of gravity (direction of gravity: arrow 58). The swivel arm 100 merely slides downward along the vertical scaffolding component 34 slightly in the direction of gravity (arrow 58) until another scaffolding mounting element on the vertical scaffolding component 34 blocks this movement.Since extensive assembly elements are required for each level of the scaffolding on the vertical scaffolding components 34, for example for attaching walkways or railings, the swivel arm 100 with the first hook-shaped fastening device 28 suspended on the vertical scaffolding component 34 can only move downwards over a short distance along the vertical scaffolding component 34 in the direction of gravity (arrow 58).

[0033] The operator can now move to the next higher level on the scaffold without having to manually hold the swivel arm 100 to prevent it from falling. From there, manually pick up the swivel arm 100 again and tilt it relative to the vertical scaffold component 34 and against the force of gravity (direction of gravity: arrow 58) in such a way that the hook-shaped fastening device 28 can be released from the vertical scaffold component 34. The operator now holds the swivel arm 100 manually, lifts it to the next higher level of the scaffold, and from this higher position on the scaffold, can hook the swivel arm 100 up one level higher again by tilting the swivel arm 100 accordingly relative to the vertical scaffold component 34 and against the force of gravity (direction of gravity: arrow 58).Once this has been done, the operator can stop manually holding the swivel arm 100 against falling, and the suspended swivel arm 100 returns under the influence of gravity (direction of gravity: arrow 58) to a position suspended from the vertical scaffolding component 34 and secured against falling by the locking element 36, without the need to manually hold the swivel arm 100. The operator can now position the swivel arm 100 with his two free hands relative to the vertical scaffolding component 34 such that the or a second fastening device 32 rests against the vertical scaffolding component 34. In this position, the operator can fasten the second fastening device 32 to the vertical scaffolding component 34, for example with a tool in the form of a wrench, an open-end wrench, a ring wrench, or a socket with a ratchet, for example with a width across flats 22 (SSW 22).The relocation and assembly of the swivel arm 100 to another location on the scaffolding has now been completed and the lifting device is already in the operating position, as shown in . Fig. 8 and Fig. 9 shown.

[0034] Out of Fig. 5 to 7 show a preferred embodiment of the second fastening device 32. This has a pivot bearing 38 with an upper U-shaped component 381 and a lower U-shaped component 382, ​​which are arranged one above the other and connected to one another. The two U-shaped components 381 and 382 are designed and arranged such that a receiving space 383 is formed between them for receiving an end 30 of the main support 10. At this end 30 of the main support 10, a corresponding U-shaped component is formed, which fits into the receiving space 383. A surface of the lower U-shaped component 382 facing this receiving space 383 is provided with a sliding surface 384, on which the end 30 of the main support 10 or the U-shaped component formed there rests.The sliding surface 384 is made of a sliding material which is also pressure-resistant, since the weight of the pivot arm 100 and a load attached to it rests on this sliding surface 384.

[0035] To attach the second fastening device 32 to the vertical scaffolding element 34, a first fastening clamp 40 with a clamp body 401, clamping screws 402, and clamping nuts 403 is arranged below the pivot bearing 38 in the direction of gravity (arrow 58) and firmly connected to the latter. The clamp body 401 is composed, in a known manner, of two elements that can be pivoted relative to one another about a pivot axis. In this way, by loosening one of the clamping nuts 403, the clamp body 401 can be opened and placed around the vertical scaffolding element 34. After the clamp body 401 has been closed again, the clamping nuts 403 on the clamping screw 402 are then tightened with an appropriate tool. As a result, the pivot bearing 38 is firmly and immovably connected to the vertical scaffolding element 34, which simultaneously represents a fastening of the pivot arm 100 to the vertical scaffolding element 34.

[0036] The two U-shaped components 381 and 382 are connected to each other via three side plates 385, with the height of these three side plates 385 determining the height of the receiving space 383. The end 30 of the main beam 10 is designed as a sliding shoe 301 (the previously mentioned U-shaped component), which is arranged within the receiving space 383 and rests on the sliding surface 384. In this way, the pivot bearing 38 transfers the substantial portion of the force exerted by a load and the dead weight of the lifting device via the first fastening clamp 40 into the vertical scaffolding component 34 and thus into the scaffolding.

[0037] Furthermore, as can be seen from Fig. 5, a second fastening clamp 42 is provided in the direction of gravity (arrow 58) above the pivot bearing 38 and is fastened to the main support and at a distance from the pivot bearing 38 or not connected to it, so that this second fastening clamp 42 can move with the pivoting pivot arm 100 or main support 10. The second fastening clamp 42 is designed as a clamping clamp, with a clamp body 421, a tensioning screw 422 and a wing nut 423. During assembly of the lifting device, the second fastening clamp 42 grips the vertical scaffolding element 34 with its clamp body 421, wherein the wing nut 423 is initially tightened by hand by the operator on the tensioning screw 422 only far enough that the second fastening clamp 42 remains movable relative to the vertical scaffolding element 34.By tightening the wing nut 423 more or less firmly, the operator can continuously adjust the force counteracting the pivoting movement of the pivot arm 100 relative to the scaffold. This force is based on friction between the inside of the clamp body 421 and an outer surface of the vertical scaffold element 34. If necessary, for example, during the lifting of a heavy load using the lifting device, a pivoting movement of the pivot arm 100 can be completely blocked by firmly tightening the wing nut 423 in a position in which the first connection point 16 is as far away from the scaffold as possible, for example to prevent the load from striking the scaffold during lifting under the influence of wind or other influences, and possibly damaging the scaffold or causing damage itself.Once the lifting of the load is finished, the operator can simply loosen the wing nut 423 again slightly so that the pivot arm 100 can be pivoted relative to the scaffold into a position in which the first connection point 16 is close to the scaffold for safe and convenient removal of the load.

[0038] As is particularly evident from Fig. 3, Fig. 8 and Fig. 10, the lifting device has a first deflection pulley 44 and a second deflection pulley 46, over which a lifting rope 48 runs. The first deflection pulley 44 is fastened near the first connection point 16 to the boom 12 and the main beam 10. The second deflection pulley 46 is arranged on the main beam 10 between the second connection point 20 and the end 30 of the main beam 10. In this way, the lifting rope 48 is guided between the two deflection pulleys 44, 46 parallel to the main beam 10. With respect to the second deflection pulley 46, a winch (not shown) is arranged on the slack side 52, by means of which the lifting rope 48 is used to lift or lower a load attached to a load hook 50 ( Fig. 3) hanging load is either retrieved (wound up) or released (unwound).

[0039] In the exemplary embodiment shown, the hook-shaped fastening device 28 can be released from the vertical scaffolding component 34 when the pivot arm 100 is pivoted about a first horizontal pivot axis 54 ( Fig. 4) is pivoted relative to the vertical scaffolding component 34 until the boom 12 is aligned substantially or almost parallel to the vertical scaffolding component 34. However, the locking element can alternatively be designed such that, in addition or alternatively, a pivoting or tilting movement of the pivot arm 100 about a second vertical axis 56 ( Fig. 4) is necessary. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 38 06 599 C1

[0004] DE 692 48 53 U

[0005]

Claims

[1] Lifting device with a pivoting arm (100), wherein the pivoting arm (100) has at least two fastening devices (28, 32) for pivoting about a vertical axis to a vertical scaffolding component (34) of a scaffolding, in particular a leading scaffolding, wherein the lifting device is in an operating position when all fastening devices (28, 32) are fastened to the vertical scaffolding component (34) of a scaffolding, characterized bythat at least one first fastening device (28) is designed as a hook-shaped fastening device, with a shaft (281), a first end (285) on the shaft (281), which is connected to the pivot arm (100), and with a second free end or with a tip (283), which is spaced from the pivot arm (100) and is arranged on an arcuate segment (282) of the hook-shaped fastening devices (28), so that an opening (284) for inserting the vertical scaffolding component (34) is formed between the first end (285) of the shaft (281) and the tip (283) of the arcuate segment (282) of the hook-shaped fastening device (28). [2] Lifting device according to claim 1, characterized by that the hook-shaped fastening device (28) is arranged in the direction of gravity above at least one second fastening device (32). [3] Lifting device according to claim 2, characterized bythat the at least one second fastening device (32) has a first fastening clamp (40) with a clamping screw (402), wherein the first fastening clamp (40) completely surrounds the vertical scaffolding component (34) when fastened to the vertical scaffolding component (34) of the scaffolding. [4] Lifting device according to claim 3, characterized by that the first fastening clamp (40) is designed as a clamping clamp or tensioning clamp, with a clamp body (401), the tensioning screw (402) and a tensioning nut (403), in particular a wing nut. [5] Lifting device according to at least one of claims 3 or 4, characterized by that the at least one second fastening device (32) has a pivot bearing (38) on which the pivot arm (100) is supported in the direction of gravity (58). [6] Lifting device according to claim 5, characterized bythat the pivot bearing (38) is U-shaped and the first fastening clamp (40) is arranged below the pivot bearing (38) in the direction of gravity (58). [7] Lifting device according to claim 6, characterized by that the pivot bearing (38) is formed from at least two superimposed, interconnected, U-shaped components (381, 382), wherein a receiving space (383) for receiving an end (30) of the pivot arm (100) is formed between the U-shaped components (381, 382), and wherein the U-shaped component (382) lying at the bottom in the direction of gravity has a bearing surface (384) made of a sliding material on a surface facing the receiving space (383). [8] Lifting device according to at least one of claims 2 to 7, characterized bythat a second fastening clamp (40) is arranged on the pivot arm (100) in the direction of gravity above and adjacent to the second fastening device (32), wherein the second fastening clamp (40) has a clamping screw (402), wherein the second fastening clamp (40) completely encompasses the vertical scaffolding component (34) when fastened to the vertical scaffolding component (34) of the scaffolding. [9] Lifting device according to claim 8, characterized by that the second fastening clamp (40) is designed as a clamping clamp or tensioning clamp, with a clamp body (401), the tensioning screw (402) and a tensioning nut (403), in particular a wing nut. [10] Lifting device according to at least one of the preceding claims, characterized bythat a locking element (36) is arranged and designed at the free second end (283) of the hook-shaped fastening device (28) in such a way that the hook-shaped fastening device (28) can only be released from the vertical scaffolding component (34) when the pivot arm (100) is pivoted about a first horizontal pivot axis (54) and / or tilted about a second horizontal axis (56) relative to the vertical scaffolding component (34) from the operating position of the lifting device. [11] Lifting device according to claim 10, characterized by that the locking element (36) rises from a plane of the hook-shaped fastening device (28) and extends so far that a projection (361) of the locking element (36) into the plane of the hook-shaped fastening device (28) at least partially covers the opening (284) between the first end (285) and the second end or the tip (283) of the hook-shaped fastening device. [12] Lifting device according to at least one of the preceding claims, characterized by that a cable winch is arranged on the swivel arm (100). [13] Lifting device according to at least one of the preceding claims, characterized by in that the pivot arm (100) has a main support (10), a boom (12) and a support element (14), wherein the main support (10) and the boom (12) are connected to one another at a first connection point (16) at a predetermined angle (18), and wherein the support element (14) is connected to the main support (10) at a second connection point (20) spaced from the predetermined angle (18) and to the boom (12) at a third predetermined point (22) spaced from the predetermined angle (18), so that the support element (14), a section of the main support (10) and a section of the boom (12) form a triangle. [14] Lifting device according to claim 13, characterized bythat an angle (24) of 90 degrees is formed at the third connection point (22) between the boom (10) and the support element (14). [15] Lifting device according to claim 13 or 14, characterized by that the hook-shaped fastening device (28) is arranged on a free end (26) of the boom (12) facing away from the first connection point (16) or on a free end (30) of the main support (10) facing away from the first connection point (16). [16] Lifting device according to claim 2 and at least one of claims 13 to 15, characterized by that the second fastening device (32) is arranged on a free end (30) of the main support (10) facing away from the first connection point (16) or on a free end (26) of the boom (12) facing away from the first connection point (16). [17] Lifting device according to claim 8 and at least one of claims 13 to 16, characterized bythat the second fastening clamp (42) is arranged on the main support (10) or the boom (12).

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