Rope deflection device with rope protection element and hoisting device with rope deflection device

Abstract

This invention relates to a rope steering device, comprising: a pulley support for supporting at least one rope guide pulley; at least one rope guide pulley, the at least one rope guide pulley being supported at the pulley support in a manner rotatable about a guide pulley rotation axis; and a rope protection device for ensuring that the rope is properly wound around the rope guide pulley, characterized in that the rope protection device is oscillating relative to the pulley support about a swing axis for switching between a protected position and a released position, wherein in the protected position the rope being steered by the rope guide pulley is protected within the rope guide pulley, and in the released position the rope being steered by the rope guide pulley is not protected within the rope guide pulley, wherein the swing axis extends parallel to the guide pulley rotation axis.

Description

Technical Field

[0001] The present invention relates to a steering device for turning a rope as described in the preamble of claim 1, as well as a system and lifting device having such a steering device. Existing technology Many lifting devices or working machines have ropes that are redirected at the machine via at least one guide pulley. For example, a lifting device or working machine may have a lifting rope that is wound multiple times between a guide pulley at the boom head and a hook trolley. The guide pulleys are typically protected by safety devices that ensure the rope does not eject from them. An example of such a safety device is the so-called rope guard bar, as it is commonly used in mobile cranes or portable cranes. The rope guard bar is arranged at a small radial distance from the guide pulleys, so that the rope guard bar does not contact the guide pulleys or the rope, but prevents the rope from ejecting from the guide pulleys.

[0002] When threading ropes in such devices, it is common for the rope to not be threaded between the rope safety bar and the guide pulley, but instead to be mistakenly looped around the rope safety bar on the outside. This can cause serious material damage to the rope. Summary of the Invention

[0003] Therefore, the object of the present invention is to reduce or even completely avoid the risk of such misalignment in such steering devices. Furthermore, it should be noted that even when “guide wheel” is referred to in the singular below, it always refers to at least one guide wheel.

[0004] According to the invention, this objective is achieved by a steering device having the features of claim 1 and a system according to claim 13 or a lifting device having the features of claim 14. Advantageous embodiments of the invention are given by the dependent claims and the following description.

[0005] Accordingly, according to the present invention, a steering device for steering a rope (such as a hoisting rope of a crane) is proposed, the steering device comprising: a pulley support for carrying at least one rope guide pulley; at least one rope guide pulley supported at the pulley support in a manner rotatable about a guide pulley rotation axis; and a rope protection device for ensuring that the rope is properly wound around the rope guide pulley. The device is characterized in that the rope protection device is oscillating relative to the pulley support about a swing axis for switching between a protected position and a released position, in which the rope being steered by the rope guide pulley is protected within the rope guide pulley, and in the released position, the rope being steered by the rope guide pulley is not protected within the rope guide pulley, wherein the swing axis extends parallel to the guide pulley rotation axis.

[0006] The steering mechanism according to the invention enables a relatively quick and intuitive switching of the rope protection device between the release and protection positions. Ultimately, this can be achieved by simply rotating approximately around the outer periphery of the guide wheel, wherein the radial distance of the protection device relative to the guide wheel typically increases when transitioning from the protection position to the release position.

[0007] In addition, the parallelism between the swing shaft and the guide wheel rotation shaft ensures the precise and stable positioning of the rope protection device, which improves the operational safety and service life of the rope guide wheel.

[0008] According to an optional modification of the invention, the rope protection device may have at least one rope protection bar, which, in the protected position of the rope protection device, is designed to limit the movement of the rope guided by the rope guide pulley radially away from the rope guide pulley, preferably wherein at least one rope protection bar is oriented parallel to the rotation axis of the guide pulley on its longitudinal axis and / or supported in a manner rotatable about its longitudinal axis.

[0009] Accordingly, a rope safety bar is used to ensure that the rope wound in the guide pulley is properly positioned within it, thus preventing the rope from accidentally springing off under no-load conditions. This is typically achieved by positioning the rope safety bar near the outer periphery of the guide pulley, such that the distance between the rope safety bar and the radially outer region of the guide pulley is less than the thickness of the rope being turned by the guide pulley.

[0010] Because the rope protection rod is oriented parallel to the rotation axis of at least one guide pulley, a particularly simple and stable rope protection device is formed by means of the oscillation used to transfer from the protected position to the release position. Since the rope protection rod serves to hold the rope in its position on the respective guide pulley when the rope, guided by the guide pulley, attempts to spring back, this helps reduce friction between the rope protection rod and the rope, especially since the rope protection rod itself is supported in a manner rotatable about its longitudinal axis. If contact occurs between the rope to be protected and the rope protection rod, the resulting friction causes the rope protection rod to rotate, thereby avoiding excessive friction that could occur if the rope protection rod could not rotate.

[0011] Advantageously, according to another improvement of the invention, in the release position, the radial distance between at least one rope protection rod and at least one rope guide pulley is greater than in the protection position, so that the rope can be properly wound onto at least one rope guide pulley, wherein the rope to be wound is arranged between at least one rope guide pulley and at least one rope protection rod.

[0012] In the release position, the rope safety bar is arranged radially away from the outer circumference of the rope guide pulley to allow the rope to be threaded through it. In the safety position, where the radial distance from the outer circumference of the rope guide pulley is smaller, the rope starter diameter is typically larger than the rope diameter, making it difficult to properly thread the rope starter of the rope to be turned through the rope guide pulley. Here, the rope starter is usually equipped with a locking sleeve (Vergusshülse) to secure the individual fibers or strands of the rope together. The diameter of this locking sleeve is larger than the rope diameter, thus preventing proper threading into the rope guide pulley when the rope safety device is in the safety position.

[0013] Preferably, in the release position, with the steering device oriented normally, at least one rope guard rod is radially further from at least one rope guide wheel than the winding curve of the rope (especially a steel cable) to be wound, whose size is adapted to at least one rope guide wheel.

[0014] Here, the winding curve is an expression well known to those skilled in the art and represents a specific path or trajectory along which a rope (such as a hoisting rope of a crane) extends during the winding process.

[0015] Preferably, it can be specified that the winding curve toward one side is determined by horizontal conveying from the other side in such a way as to reach the upper apex of the rope guide wheel, and the rope starting point that crosses the upper apex of the rope guide wheel is observed as the rope length continues to be conveyed.

[0016] According to another alternative modification of the invention, the swing axis may be arranged to have a radial offset relative to the guide wheel rotation axis relative to at least one rope guide wheel.

[0017] By radially offsetting the swing axis relative to the rotation axis of the guide wheel, the desired effect is achieved, for example, when the rope protection device swings. According to this effect, the radial distance relative to the outer periphery of at least one rope guide wheel is smaller in the protected position of the rope protection device than in the released position.

[0018] Furthermore, according to the invention, the rope protection device may have two side elements that are rotatably fastened to opposing side members of the receiving cavity of a pulley bracket for accommodating at least one rope guide pulley, such that the rotatable fastening of the two side elements constitutes the swing axis of the rope protection device, preferably wherein the two side elements are structurally identical to each other.

[0019] Therefore, it can be specified that the rope protection device has two side elements, each of which is rotatably fastened to a side part of the pulley bracket. In this case, the rotatable fastening of the respective side element is typically performed along the swing axis, so that the swinging of the two side elements allows the rope protection device to switch between a release position and a protected position.

[0020] Here, each of the two side elements is arranged at a side member of the receiving cavity of the pulley bracket, wherein such a side member is offset relative to at least one rope guide wheel received in the receiving cavity in the direction of the guide wheel's rotation axis, and such a side member is generally used to support at least one rope guide wheel received in the receiving cavity. Here, the fastening of the first side element is achieved at the first side member, and conversely, the fastening of the second side element is achieved at a side member offset in the direction of the guide wheel's rotation axis and opposite to the first side member. Accordingly, the two inner surfaces of the side member of the pulley bracket face different planar sides of at least one rope guide wheel. It will be apparent to those skilled in the art that the two side elements are not necessarily required to be arranged inside the two side members, and other surfaces of the side members can also be used for this purpose. For example, it is specified that the two side elements are rotatably fastened at an element that protrudes forward from the side member, wherein the protruding element is then located in a plane parallel to the plane defined by the rope guide wheel.

[0021] The receiving cavity is typically adjusted according to the precise number of one or more rope guide pulleys, so that the width of the receiving cavity is substantially consistent with the width of the multiple rope guide pulleys arranged side by side. However, those skilled in the art will understand that not all rope pulleys need to be used, i.e., threaded.

[0022] According to another advantageous design of the invention, at least one rope protection rod is supported, in particular rotatably supported, at its respective longitudinal end region on two side elements and oriented parallel to the axis of rotation of the guide wheel.

[0023] Accordingly, the rope safety rod is supported at side elements spaced apart from each other along the axis of rotation of the guide wheel. Specifically, one longitudinal end of the rope safety rod, the longitudinal end region, is supported at the first side element, and the other longitudinal end, the other longitudinal end region, is supported at the second side element. For support, openings are provided in the respective side elements, allowing the rope safety rod to be rotatably accommodated within them. Locking of the rope safety rod (preventing it from leaving its desired position in the corresponding opening of the side element) is achieved by inserting a locking pin (which traverses the diameter of the rope safety rod), thus preventing or allowing only very limited movement of the rope safety rod along the axis of rotation of the guide wheel. Alternatively, the rope safety rod supported by the two side elements may have such an opening for inserting a locking pin in each of its two longitudinal end regions, thereby securing the rope safety rod in the direction of rotation of the guide wheel by providing these two locking pins.

[0024] Furthermore, it may be specified that the blocking element extends between the two side elements along the direction of the guide wheel's rotation axis. This blocking element is used to make it difficult for the rope, which is turned by the guide wheel, to pass on the opposite side from the rope protection device toward at least one guide wheel. In particular, it makes it impossible for a rope whose size is adapted to at least one rope guide wheel or its rope potting sleeve located at the rope's starting point to pass through the opening area between the blocking element and the rope protection rod.

[0025] Here, the blocking element can be designed as a plate or a tube, and extends from one side element to the other side element.

[0026] By incorporating a blocking element, mis-wounded ropes can no longer be ignored or are less likely to be overlooked, as the mis-wounded rope now crosses not only the rope guard bar but also the blocking element on the side facing away from the rope guide pulley, thus making it significantly easier to detect. Ultimately, both the rope guard bar and the blocking element are tightened by the mis-wounded rope on their side facing away from the rope guide pulley. However, according to the invention, the possibility of such mis-wounding is significantly reduced because accidental mis-wounding is practically eliminated. However, if someone intentionally or for other reasons tightens the rope to be wound on the side of the rope guard bar facing away from the rope guide pulley, this situation can also be visually identified more easily and clearly in the steering device according to the invention.

[0027] According to another advantageous design of the invention, a handle element, particularly a rod-shaped handle element, extends parallel to the guide wheel rotation axis between two side elements, which enables the rope protection device to be easily swung manually between a release position and a protection position.

[0028] A handle element is highly advantageous for transferring the rope protection device from the protected position to the released position and vice versa, allowing for simple manual switching between these two positions. Furthermore, to apply a force to the rope protection device that is substantially consistent with the swing performed for position switching, it is advantageous for the handle element to extend between two side elements, thus enabling force to be applied to both side elements simultaneously.

[0029] According to another optional improvement of the invention, the steering device may further include at least one locking device for locking the rope protection device at the pulley bracket in the protected position and / or the release position.

[0030] This locking device is used to lock the device in the release position and / or the protection device. This is particularly advantageous because it is undesirable for the rope protection device to accidentally leave the release position and / or the protection device. A last possibility is that when the rope protection device leaves its protection device, it can no longer prevent the rope guided by the rope guide pulley from springing back. Furthermore, it is also undesirable for the rope protection device to accidentally leave the release position, as this could significantly interfere with the normal progress of the winding or retrieval process. In some cases, it is not even guaranteed that the rope protection bar is actually outside the winding curve, thus the rope to be wound may collide unintentionally with the rope protection device, or in the worst case, accidentally cross the rope protection device, thereby tightening the rope to be wound through the side of the rope protection bar opposite the rope guide pulley.

[0031] Therefore, for the reasons mentioned above, it is advantageous that the rope protection device can be reliably positioned in the release position and / or in the protection device.

[0032] According to another advantageous improvement of the invention, at least one locking device includes a locking opening and an associated locking lug, wherein one component of the locking device is arranged at the rope protection device and another component is arranged at the pulley bracket. Preferably, at least one locking device includes a preloaded locking pin as a locking lug, an associated locking hole as a locking opening, and a deflection element such that when the rope protection device is moved to a protected position and / or a released position, the deflection element causes the locking pin to deflect opposite to its preloaded position, and after reaching the protected position and / or the released position, the preloaded locking pin engages in the locking opening aligned with the locking pin.

[0033] For example, an element that bends toward the central region of the receiving cavity can be considered as a deflecting element. When performing a swing for transfer to the release position and / or in the protection device, the bending element presses against the preloaded locking element by means of the tensioning element in the opposite direction of the preload, thereby locking in the opening, stepped edge, etc. after finally reaching the desired position.

[0034] Once in place, the locking element, which is preloaded by the tensioning element, can be disengaged from its occupied position by overcoming the spring force of the tensioning element. This prevents the locking element from engaging with the locking mechanism, and the rope protection device can then resume its swing motion.

[0035] According to another optional modification of the invention, in the protected position, the locking device includes a rope protection bar and a receiving opening for the rope protection bar arranged on the opposite side of the receiving cavity of the pulley bracket, so that the protected position can only be left after the rope protection bar has disengaged from the receiving opening.

[0036] According to this embodiment, the rope safety bar is part of the locking device, so that the rope safety device can only be moved out of the release position and / or the safety device if the rope safety bar has been removed from the corresponding opening securely connected to the side member of the pulley bracket. Furthermore, it can be specified that in the release position and / or the safety device, each of the two side elements, and the openings extending from or formed therein from the two side members, are aligned with each other, so that locking of the rope safety device is achieved by pushing the rope safety bar into the aligned openings of the side elements and into the openings extending from or formed therein from the side members.

[0037] According to another optional modification of the invention, at least two rope protection rods are provided, which operate in different radial regions of at least one rope guide pulley, and the respective ranges of action of the two rope protection rods enclose each other in the circumferential direction of the rope guide pulley at an angle greater than 60°, preferably greater than 75° and more preferably greater than 90°.

[0038] To ensure that the rope, after being turned by the rope guide pulley, remains within its designated guide range over the greater circumference of the rope guide pulley, it is advantageous to install multiple rope safety bars spaced apart from each other along the circumference of the rope guide pulley. This ensures that the rope remains within the guide range of the rope guide pulley at two circumferentially spaced points. Thus, it is possible to ensure that the rope is guided within the designated guide range of the rope guide pulley over its greater circumference.

[0039] In another alternative modification, it can be specified that each of the two rope safety bars extends between the two side elements and / or the two rope safety bars are oriented parallel to each other.

[0040] Furthermore, the present invention relates to a system comprising a steering device and a rope according to one of the aspects discussed above, wherein the rope is adapted in its dimensions, particularly its diameter, to at least one rope guide pulley and is steering by the rope guide pulley, wherein preferably, the rope is a steel cable.

[0041] Furthermore, the present invention relates to a working machine or lifting device, such as a crane or mobile crane, having a steering device according to one of the aspects discussed above or a system according to the preceding paragraph.

[0042] Advantageously, it can be specified here that the steering device is arranged at the boom head, especially for telescopic booms, and is preferably used to form a rope connection with the hook pulley held by the boom. Attached Figure Description

[0043] Further features, details, and advantages of the invention will become apparent from the embodiments described below with reference to the accompanying drawings. Wherein: Figure 1 A side view of an embodiment of the working machinery or lifting device according to the present invention is shown. Figure 2 A front view of the boom head according to the prior art is shown. Figure 3 A side view shows a steering device according to the prior art, along with a hook trolley connected to the steering device; Figure 4.1 A perspective view of the rope protection device according to the invention according to a first embodiment is shown; Figure 4.2 A side view of the steering device according to the invention, based on a first embodiment, is shown, wherein the rope protection device is in the released position. Figure 4.3 A side view of the steering device according to the invention, based on a first embodiment, is shown, wherein the rope safety device is in the safety position. Figure 4.4 A perspective view of the steering device according to the first embodiment is shown, wherein the rope safety device is in the safety position. Figure 5.1 A perspective view of the rope protection device according to the invention according to a second embodiment is shown. Figure 5.2 A perspective view of the steering mechanism is shown, in which the rope protection device of the second embodiment is in the released position. Figure 5.3 A perspective view of the steering device is shown, in which the rope protection device of the second embodiment is in the protected position. Figure 6.1 A perspective view of a rope protection device according to the invention, based on a third embodiment, is shown. Figure 6.2 A perspective view of the steering mechanism is shown, in which the rope protection device of the third embodiment is in the released position. Figure 6.3A side view of the steering device is shown, in which the rope protection device of the third embodiment is in the released position, in which the rope winding curve is supplemented. Figure 6.4 A perspective view of the steering device is shown, in which the rope protection device of the third embodiment is in the protected position. Detailed Implementation

[0044] exist Figure 1 A side view illustrates an embodiment of the lifting device or working machinery 1 according to the present invention. The working machinery 1 of the illustrated embodiment is a mobile crane having a movable lower structure 2, an upper structure 3 rotatably supported on the lower structure 2, and a telescopic boom 4 arranged on the upper structure 3, the telescopic boom having a boom head 11 at the end of the innermost telescopic section. At the boom head 11, a lifting rope 5 is guided by a lifting rope winch through a plurality of guide pulleys 9 and is wound between the guide pulleys 9 and a hook trolley 6. The boom head 11 may have at least one steering device 100 according to the present invention for steering the lifting rope 5. However, the invention is not limited to this embodiment.

[0045] Figure 2 An embodiment of a boom head 11 is shown, having an upper pulley assembly consisting of rope guide pulleys 10 and a lower pulley assembly consisting of rope guide pulleys 9. According to the invention, each pulley assembly can be formed by a corresponding steering device 10 according to the invention, so that for each pulley assembly, rope 5 ejection is prevented, and mis-winding is reliably prevented or more easily identified. However, the invention also includes the possibility that only one of the two pulley assemblies is formed by the steering device 100 according to the invention.

[0046] In the case of multiple guide wheels 9 arranged side by side, such as in Figure 2 As shown, the rope protection device 14 extends above all the side-by-side guide wheels 9.

[0047] Figure 3 A side view of a steering device according to the prior art is shown, in which the telescopic boom 4 and the pulley head 8 arranged at the front end of the telescopic boom can be seen. The upper rope guide pulley 10 forming the upper pulley assembly directs the lifting rope 5 downward toward the hook trolley 6. Here, also by means of the rope guide pulley (in Figure 3 (Not visible in the middle) causes it to turn back to the pulley head 8, so that the rope 5 can be passed through the rope guide pulley 9 of the lower pulley group, and then the rope is guided back to the hook trolley 6. Depending on the number of rope guide pulleys 9, multiple loops are formed between the pulley head 8 and the hook trolley 6.

[0048] exist Figure 3As can be seen, during the winding process, the rope safety bar 7 was incorrectly not removed, causing the rope 5, which was turned by the rope guide pulley 9, to extend on the side of the rope safety bar 7 opposite to the rope guide pulley 9. Proper guidance of the rope 5 should be achieved in the intermediate area between the rope guide pulley 9 and the rope safety bar 7, as only in this way can the rope 5 be prevented from popping out of its guidance by the rope guide pulley 9 under certain conditions. Furthermore, a second rope safety bar 13 can be seen arranged in the upper area of ​​the conveyor pulley 9.

[0049] Figure 4.1 This is a perspective view of the rope protection device 14 according to the present invention, which is pivotally arranged at the pulley head 8. The rope protection device has a first side element 21 and a second side element 23, each having an opening for connection with the pulley head 8. Here, the two side elements 21 and 23 are spaced apart from each other along the pulley rotation axis and are connected to each other by a rope protection rod 7 extending parallel to the pulley rotation axis. To ensure easy operation of the rope protection device 14, a handle element 12 extending along the pulley rotation axis can also be provided, which connects the two side elements 21 and 23 to each other.

[0050] In addition, an optional blocking element 32 is shown, which also extends between the two side elements 21, 23, and its function will be explained in more detail in the following description of the figures. It can be seen that the stop elements 20, 33 protrude from the blocking element 32 along the direction of the pulley's rotation axis, and the stop elements are used for the correct positioning of the rope protection device 14 in the protected position. When the rope protection device 14 reaches the release position, the stop portions 34, 35 work together with the components of the pulley head 8.

[0051] The dashed line 25 symbolically illustrates the positional change of a preloadable locking element arranged at the pulley head 8. For example, when the rope protection device 14 is moved to the protected position, the locking element is pressed back or tensioned by the curved section 231 at the side element, so that after reaching the protected position, the locking element engages into the opening 24 due to the elastic preload generated by the curved section 231.

[0052] Similarly, the dashed line 22 symbolically illustrates the positional change of a preloadable locking element located at the pulley head 8. For example, when the rope protection device 14 is moved to the release position, the locking element presses against the first side element 21 by a certain force generated by the preload, so that after reaching the release position, the locking element engages into the opening 28 due to the preload and fixes the rope protection device 14 in the release position.

[0053] As can be seen in the accompanying drawings, the steering device 100 is accordingly designed to allow the protection device 14 to be moved into the open and released positions by rotation about the swing axis 15. At this time, for example, the locking bolt 17 moves along curve 22 on the side element 21 of the rope protection device 14 until it engages in the opening 28. This locking is automatically accomplished by the elastic reset of the locking bolt 17, thus securing the rope protection device 14 in the open position without additional assembly work.

[0054] Figure 4.2 A side view of the steering device 100 is shown, with the safety device 14 in the open / released position. In this position, the rope safety device 14 rotates about a swing axis 15 extending parallel to the rotation axis of the guide wheel, thereby reliably threading the lifting rope 5. During the threading process, the lifting rope 5 extends along the threading curve 16 (shown as dashed lines) and is guided to the hook trolley 6 via the rope pulley 9. It can be seen that, since it swings to the release position, the rope safety bar 7 of the rope safety device 14 is not in the area between the threading curve 16 and the outer periphery of the rope guide wheel 9, thus eliminating the risk that the rope to be threaded will be guided along the side of the rope safety bar 7 opposite to the rope guide wheel 9 during the threading process.

[0055] Here, the winding curve refers to the position of the rope's starting point during the winding process. Preferably, it can be specified that the winding curve on the side of the rope pulley is determined by conveying the rope in a substantially horizontal manner to reach the upper apex of the rope guide pulley, and the rope starting point beyond the upper apex of the rope guide pulley is determined as the rope length continues to be conveyed.

[0056] It should be noted that, in order to ensure smooth weaving, any possible second rope safety bar 13, which is located in the upper area of ​​the rope guide pulley 9, should also be removed.

[0057] To lock the rope protection device 14 in its protected position, a receiving element 40 is provided, protruding forward from the pulley head 8. The receiving element has a spring-loadable locking pin 18 at its end facing away from the pulley head 8. This locking pin can cooperate with a corresponding locking opening 24 at one of the two side elements of the protection device 14 to simultaneously establish a locking connection when the protection device 14 is moved to the protected position. A similar locking device is also provided to hold the protection device 14 in the released position.

[0058] Figure 4.3A side view of the steering device 100 is shown, with the rope protection device 14 in the closed, protected position. In this position, the rope protection device 14 is oriented to protect the lifting rope 5 from being ejected from at least one rope guide pulley 9. The rope protection device 14 is locked by a locking bolt 18, which, in the closed position, is guided along the curved section 231 to the side element 23 and along the curve 25 until it engages with the opening 24. This locking ensures that the lifting rope 5 is sufficiently pressed against the vicinity of the rope pulley 9, thereby guaranteeing stable and safe guidance of the rope 5.

[0059] Furthermore, the design of the rope protection device 14 combined with the locking bolts 18 and 19 ensures that the installation of the rope protection bar is no longer required by directly touching the lifting rope 5 against the groove of the rope pulley 9 by hand, as is common in the prior art. Instead, this is achieved automatically by contacting the rope protection device 14 when moving to the protection position.

[0060] Figure 4.4 A perspective view of the lower portion of the pulley head 8 is shown, with the rope safety device 14 in the closed position. Here, the locking pin 17 can also be seen, which connects to the opening 26 (e.g., in...) Figure 4.1 (As shown in the figure) They work together to ensure that the rope protection device 14 is locked in the release position.

[0061] Furthermore, it can be seen that, in order to reliably secure the protective device 14 in the protected position, there is an opening at each of the two sides 21, 23 that works in conjunction with a locking device that is secured to the pulley head 8 by the receiving element 40. Figure 4.4 On the left side shown, a locking pin 19 can be seen at the receiving element 41, and on the right side shown, a locking pin 18 can be seen at the receiving element 40. Both locking pins are fastened to the pulley head 8.

[0062] Figure 5.1 A second embodiment of the invention is shown, in which the basic principle of the rope protection device's swing is retained, but the locking method relative to the pulley head in the protected position differs. Specifically, the rope protection device 14 is locked by means of the rope protection rod 7 and an opening in the distal region of the corresponding side element into which the rope protection rod 7 can be inserted. To ensure the secure positioning of the rope protection rod 7, the rope protection rod may have flip pins 28, 29 at its corresponding longitudinal end region, which ensure reliable fixation after passing through the opening of the rope protection device 14.

[0063] Figure 5.2A steering device 100 according to a second embodiment is shown, wherein the protective device 14 is in its open position. As already described, the rope protection bar 7 is used for locking in the protective position. In the open position, the release position, the rope protection bar 7 is removed, thereby allowing the rope protection device 14 to move to the release position so as to pass through the lifting rope 5 along the defined winding curve 16.

[0064] The rope protection device 14 is brought into the open position by rotation about the swing axis 15. The flip pins 28 and 29 must be removed beforehand to pull the rope protection bar 7 out of the openings in the receiving elements 30 and 31 located at the pulley heads 8 on the left and right sides of the pulley assembly. After removing the rope protection bar 7, the rope protection device 14 (without the pulled-out rope protection bar 7) can be moved upwards about the swing axis 15 to the open position. Subsequently, the locking bolt 17, as described in the above embodiment, automatically locks the rope protection device 14 in the released position.

[0065] In this way, there is now sufficient space in the radial direction of the rope guide pulley 9 for guiding the rope starting point downwards, especially... Figure 5.2 The locking potting sleeve 36 is drawn in the middle for proper threading.

[0066] Figure 5.3 A perspective view of the steering device 14 of the second embodiment is shown in the protected position. (As discussed previously...) Figure 5.2 In contrast, it can be seen that a rope starter with a locking filler sleeve 36, which is typically arranged at the rope starter, cannot pass through because the blocking element 32 prevents direct guidance along the outside of the rope protection rod 7. Here, the space between the rope protection rod 7 and the blocking element 32 is designed such that the locking filler sleeve 36 cannot pass through.

[0067] Furthermore, the steering device according to the second embodiment, which has the rope protection device 14, can more easily modify the existing pulley head 8 because the rope protection device utilizes the existing receiving parts 30 and 31 and is compatible with the same pre-installed accessories (such as the rope protection bar 7 and the flip pins 28 and 29) used in prior art implementations.

[0068] Figure 6.1 A perspective view of a third embodiment of the steering device 100 is shown, wherein the rope protection device 14 includes not only a rope protection bar 7 but also a second rope protection bar 13, which is typically arranged near the upper apex of the rope guide wheel 9 housed in the pulley head 8.

[0069] Similar to the first rope protection bar 7, the second rope protection bar 13 also extends parallel to the guide wheel rotation axis or swing axis 15 from one side element to the other. Advantageously, now, with only one movement (i.e., the swing of the rope protection device 14 of the steering device 100 according to the third embodiment), not only the first rope protection bar 7 but also the second rope protection bar 13 can be moved into position, thereby completely eliminating or at least significantly reducing the probability of incorrect winding during the winding process.

[0070] Furthermore, it can be seen that opening 25 is no longer used for locking in only one of the two positions (release position and protective position), but for locking in both positions. Here, in order to preload the locking pin for each movement to the release or protective position, the side element has a correspondingly designed curved section that pushes back the locking pin not only in the release position but also in the protective position, so that when the locking pin aligns with opening 26, the locking pin engages and locks the rope protection device 14 in the corresponding position.

[0071] To ensure sufficient stability of the rope protection device 14 even if the two rope protection poles 7 and 13 are removed (e.g., for replacement during maintenance), an additional stabilizing element 27 can be provided next to the handle-shaped support 12. This stabilizing element preferably connects the two side elements 21 and 23 to each other in the area of ​​the second rope protection pole 13. In this case, the stabilizing element 27 also serves as a blocking function.

[0072] Figure 6.2 The guide device 100 is shown with its rope protection device 14 in the released position. To reach the open position, the rope protection device 14 is moved upward by rotation about the swing axis 15, wherein rope protection bars 7 and 13 are simultaneously introduced into the open position. This simplifies the winding process because it is no longer necessary to remove either of the two rope protection bars 7, 13 from the pulley head 8. The guide wheel rotation axis is also symbolically illustrated by a dashed line parallel to the swing axis 15.

[0073] Figure 6.3A side sectional view is shown, in which the rope protection device 14 is in its released position. It can be seen that neither the first rope protection bar 7 nor the second rope protection bar 13 interferes with the winding curve 16, which extends between the respective rope protection bars 7, 13 and the radial outer periphery of the rope guide pulley 9. This means that during normal winding, the respective rope protection bars 7, 13 will not collide with the rope to be wound, specifically the locking sleeve located at the starting point of the rope to be wound, thus allowing the normal winding process to be completed. Advantageously, the rope protection device 14 ensures that both rope protection bars 7, 13 are transferred from their protected positions to their respective released positions with a single swing. Accordingly, a separate working process for disassembling the two rope protection bars 7, 13 to perform the winding process is no longer required.

[0074] Here, a major advantage for the winding process is the elimination of detachable, loose parts, thus preventing forgotten components from falling from a height. This implementation method also eliminates this source of risk.

[0075] Figure 6.4 The steering device 100 is shown in its closed position. In this position, the rope safety device 14 is oriented such that the lifting rope 5 operates safely in the rope pulley 9 and is protected against being thrown off (wherein the rod is not in contact with the pulley). Upon reaching the release position and / or the safety position, the rope safety device 14 is automatically locked because at least one locking bolt here also extends into the opening of the side element when the corresponding position is reached.

[0076] List of reference numerals 1. Working machinery 2. Lower Structure 3. Superstructure 4 Telescopic boom 5 lifting ropes 6 hook pulleys 7 Rope Safety Rod 8 pulley heads 9. Rope guide pulleys (lower pulley assembly) 10 Rope Guide Shelves (Upper Shelf Group) 11 boom head 12 handle components 13 Second Rope Protection Pole 14 Rope Protection Devices 15 swing axis 16 winding curves 17-card lock pin 18-lock bolt 20 stop elements 21 First side element 22 curves 23 Second side element 24 openings 25 opening 26 openings 27 stabilizing elements 28 flip pins 29 Flip-lock pin 30 receiving elements 31 receiving element 32 blocking elements 33 Stop element 34 Stop section 35 Stop section 36 Locking Encapsulation Sleeve 40 receiving elements 41 receiving element 100 Steering System 231 Bend Section

Claims

1. A rope steering device, comprising: A pulley bracket for supporting at least one rope guide pulley; At least one rope guide pulley is supported at the pulley bracket in a manner rotatable about a guide pulley rotation axis; as well as A rope safety device is provided to ensure that the rope is properly wound around the rope guide pulley. Its features are, The rope protection device is oscillating about a swing axis relative to the pulley bracket to switch between a protected position and a released position. In the protected position, the rope turned by the rope guide pulley is protected within the rope guide pulley, and in the released position, the rope turned by the rope guide pulley is not protected within the rope guide pulley. The swing axis extends parallel to the rotation axis of the guide wheel.

2. The steering device according to claim 1, wherein, The rope protection device has at least one rope protection bar, which, in the protected position of the rope protection device, is designed to limit the radial movement of the rope guided by the rope guide pulley away from the rope guide pulley, preferably wherein... The at least one rope protection rod is oriented parallel to the guide wheel rotation axis on its longitudinal axis and / or supported in a manner rotatable about its longitudinal axis.

3. The steering device according to claim 2, wherein, In the release position, the radial distance between the at least one rope safety bar and the at least one rope guide pulley is greater than in the safety position, so that the rope can be properly wound onto the at least one rope guide pulley, wherein the rope to be wound is arranged between the at least one rope guide pulley and the at least one rope safety bar, preferably wherein In the release position, with the steering device oriented normally, the at least one rope protection rod is radially farther from the at least one rope guide wheel than the winding curve of the rope, especially the steel cable, to be wound around the at least one rope guide wheel, whose dimensions are adapted to the at least one rope guide wheel.

4. The steering device according to any one of the preceding claims, wherein, The swing axis is arranged to have a radial offset relative to the guide wheel rotation axis relative to the at least one rope guide wheel.

5. The steering device according to any one of the preceding claims, wherein, The rope protection device has two side elements that are rotatably fastened to opposing side members of a receiving cavity for accommodating the at least one rope guide pulley, such that the rotatable fastening of the two side elements constitutes the swing axis of the rope protection device, preferably wherein the two side elements are configured to be identical to each other.

6. The steering device according to claim 5, wherein, The at least one rope protection rod is supported at the two side elements in its respective longitudinal end region, in particular rotatably supported, and oriented parallel to the rotation axis of the guide wheel.

7. The steering device according to any one of claims 5 or 6, wherein, The blocking element extends between the two side elements along the direction of the guide wheel's rotation axis. The blocking element is used to make it difficult for a rope deflected by the guide wheel to pass on the opposite side from the rope protection device toward the at least one guide wheel, especially to prevent a rope sized to fit the at least one rope guide wheel or its rope potting sleeve located at the rope's starting point from passing through the opening area between the blocking element and the rope protection rod.

8. The steering device according to any one of claims 5 to 7, further comprising a handle element, preferably wherein the handle element, in particular a rod-shaped handle element, extends parallel to the guide wheel rotation axis between the two side elements, the handle element enabling simple manual swinging of the rope protection device between the release position and the protection position.

9. The steering device according to any one of the preceding claims further includes at least one locking device for locking the rope protection device at the pulley bracket in the protected position and / or the released position.

10. The steering device according to claim 9, wherein, The at least one locking device includes a locking opening and an associated locking lug, wherein one component of the locking device is disposed at the rope protection device, and another component is disposed at the pulley bracket, preferably wherein The at least one locking device includes a preloaded locking pin as a locking lug, an associated locking hole as a locking opening, and a deflection element such that, when the rope protection device is moved to the protected position and / or the released position, the deflection element causes the locking pin to deflect in the opposite direction to its preloaded position, and after reaching the protected position and / or the released position, the preloaded locking pin engages in the locking opening aligned with the locking pin.

11. The steering device according to claim 9, further improved to have the features of claim 2, wherein, In the protected position, the locking device includes the rope protection bar and a receiving opening for the rope protection bar located on the opposite side of the receiving cavity of the pulley bracket, so that the rope protection bar can only leave the protected position after it has disengaged from the receiving opening.

12. The steering device according to any one of the preceding claims, wherein, At least two rope safety rods are provided, which function in different radial regions of the at least one rope guide pulley, and the respective ranges of action of the two rope safety rods enclose each other in the circumferential direction of the rope guide pulley at an angle greater than 60°, preferably greater than 75°, and more preferably greater than 90°.

13. A system comprising a steering device and a rope according to any one of the preceding claims, wherein, The rope is adapted in its size, especially its diameter, to the at least one rope guide pulley and is turned by the rope guide pulley, wherein preferably, the rope is a steel cable.

14. A lifting device, such as a crane or mobile crane, having a steering device according to any one of claims 1 to 12 or a system according to claim 13.

15. The lifting device according to claim 14, wherein, The steering device is arranged at the boom head, especially of a telescopic boom, and is preferably used to form a rope connection with the hook pulley held by the boom.

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