Cable deflection device having cable fixing elements, and lifting device equipped therewith

Abstract

In deflection devices, the risk of such incorrect cable winding is reduced or completely prevented. [Solution] The present invention relates to a cable deflection device comprising: a pulley mounting portion for supporting at least one cable deflection pulley; at least one cable deflection pulley mounted on the pulley mounting portion so as to be rotatable around the pulley rotation axis; and a cable fixing device for ensuring the correct winding of the cable on the cable deflection pulley, wherein the cable fixing device is rotatable around a pivot axis relative to the pulley mounting portion, and the pivot axis extends parallel to the pulley rotation axis, so as to switch between a fixed position in which the cable deflected by the cable deflection pulley is fixed to the cable deflection pulley and a released position in which the cable deflected by the cable deflection pulley is not fixed to the cable deflection pulley.

Description

Technical Field

[0001] The present invention relates to a deflection device for changing the direction of a cable described in the first part of claim 1, and a system and a lifting device provided with the same.

Background Art

[0002] A plurality of lifting devices or working machines are provided with a cable (wire rope) whose direction is changed through at least one deflection pulley (deflection sheave) of the machine. For example, there is a lifting cable that is wound (reeved) multiple times between the deflection pulleys of the boom head and the hook block. The deflection pulley is often protected by a safety device that prevents the cable from jumping out of the deflection pulley. Examples of such safety devices include the so-called cable protection bars that are commonly used in wheel cranes, i.e., mobile cranes. These cable protection bars are arranged at a small radial distance from the deflection pulley and do not contact the deflection pulley or the cable, but prevent the cable from jumping out of the deflection pulley.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In such a device, during the winding (reeving) of the cable, it often occurs that the cable is not passed between the cable protection bar and the deflection pulley but is erroneously guided outside the protection bar. This may cause serious damage to the cable.

[0004] Therefore, an object of the present invention is to reduce or completely prevent the risk of such incorrect cable reeving in this type of deflection device. It should be noted that when the "deflection pulley" is described in the singular below, it always means at least one deflection pulley.

Means for Solving the Problems

[0005] According to the present invention, this objective is achieved by a deflection device having the features of claim 1, and a lift device having the system according to claim 13 or the features of claim 14. Advantageous embodiments of the present invention will become apparent from the dependent claims and the following description.

[0006] Accordingly, the present invention proposes a cable deflection device for lift cables of cranes and the like, comprising a pulley mounting portion for supporting at least one cable deflection pulley, at least one cable deflection pulley mounted on the pulley mounting portion so as to be rotatable around the pulley rotation axis, and a cable fixing device for ensuring the correct winding of the cable on the cable deflection pulley. The device is characterized in that the cable fixing device is rotatable around a pivot axis relative to the pulley mounting portion and extends parallel to the pivot axis pulley rotation axis, so as to switch between a fixed position in which a cable deflected (with its direction changed) by the cable deflection pulley is fixed to the cable deflection pulley and a released position in which a cable deflected by the cable deflection pulley is not fixed to the cable deflection pulley.

[0007] The deflection device of the present invention makes it possible to switch the cable fixing device between a released position and a fixed position relatively quickly and easily. Basically, all that is required is a pivoting motion guided by the outer circumference of the deflection pulley, and normally the radial distance of the fixing device relative to the deflection pulley increases when moving from the fixed position to the released position.

[0008] Furthermore, the parallelism between the pivot axis and the pulley rotation axis ensures accurate and stable positioning of the cable fixing device, thereby improving the operational reliability and service life of the cable deflection pulley.

[0009] According to any modification of the present invention, the cable fixing device has at least one cable protection bar, which is configured to restrict the cable guided by the cable deflection pulley from moving radially away from the cable deflection pulley when the cable fixing device is in a fixed position, and preferably at least one cable protection bar is oriented such that its longitudinal axis is parallel to the axis of rotation of the pulley and / or is mounted to be rotatable around its longitudinal axis.

[0010] Therefore, the cable protection bar serves to fix the orientation of the cable, which is correctly routed around the deflection pulley, within the deflection pulley and prevent the cable from undesiringly popping out under no-load conditions. This is usually achieved by positioning the cable protection bar closer to the outer circumference of the deflection pulley, so that the distance between the cable protection bar and the radially outer region of the deflection pulley is smaller than the diameter of the cable deflected by the deflection pulley.

[0011] Since the cable protection bar is positioned parallel to the axis of rotation of at least one deflection pulley, a pivoting motion leading to a transition from a fixed position to a released position forms a particularly simple and robust cable securing device. If a cable guided by the deflection pulley attempts to fly out, the cable protection bar contributes to holding the cable in place within each deflection pulley. Therefore, it is useful if the cable protection bar itself is mounted rotatably around its longitudinal axis to reduce friction between the cable protection bar and the cable. When the cable to be secured and the cable protection bar come into contact, the friction generated in the process causes the cable protection bar to rotate, thereby preventing the generation of excessive friction that would occur if the cable protection bar were not rotatable.

[0012] In yet another application of the present invention, advantageously, at least one cable protection bar is radially spaced greater from at least one cable deflection pulley in the open position than in the fixed position, thereby enabling correct winding of the cable on at least one cable deflection pulley, and allowing the cable to be wound to be positioned between at least one cable deflection pulley and at least one cable protection bar.

[0013] In the open position, the cable protection bar is positioned further radially away from the outer surface of the cable deflection pulley to allow the cable to be wound around the cable within the cable deflection pulley. In the fixed position, the radial distance from the outer surface of the cable deflection pulley is smaller, so the cable start end of the cable deflected by the cable deflection pulley cannot be properly wound around, as its diameter is usually larger than the cable's diameter. In this case, the cable start end is usually provided with a spelta socket (cable end fixing socket) used to hold the individual fibers or strands of the cable together. This closed type of spelta socket has a diameter larger than the cable's diameter, making proper winding around the cable deflection pulley impossible when the cable fixing device is in the fixed position.

[0014] Preferably, in the released position and when the deflection device is oriented toward the target direction, at least one cable protection bar is radially further away from at least one cable deflection pulley than the winding curve of the cable to be wound, particularly a steel cable, which is sized to fit at least one cable deflection pulley.

[0015] In this case, the winding curve represents a concept well known to those skilled in the art and refers to a specific path or route that a cable, such as a crane lift cable, takes along a cable deflection pulley during the winding process.

[0016] In this case, it is preferable to set the winding curve on one side by feeding it horizontally from the opposite side to the upper end of the cable guide pulley, and to monitor the starting end of the cable guided to the upper end of the cable guide pulley by feeding in a further length of cable.

[0017] According to yet another selective modification of the present invention, the pivot axis may be positioned radially offset with respect to the pulley rotation axis with respect to at least one cable deflection pulley.

[0018] By offsetting the pivot axis radially with respect to the pulley rotation axis, a desirable effect can be obtained during the pivoting operation of the cable fixing device, such that, for example, the radial distance at the fixed position of the cable fixing device becomes smaller than the distance at the release position with respect to the outer circumference of at least one cable deflection pulley.

[0019] Furthermore, according to the present invention, the cable fixing device has two rim elements, which are rotatably mounted on opposing sides of the receiving space of a pulley mounting portion that accommodates at least one cable deflection pulley, and the rotatable mounting of the two rim elements forms a pivot axis of the cable fixing device, preferably so that the two rim elements are identical to each other.

[0020] Therefore, the cable fixing device can be configured to include two rim elements, each rotatably mounted on each side of the pulley mounting section. In this case, the rotatable mounting sections of each rim element are usually located on the axis of rotation, so that the cable fixing device can be switched between a released position and a fixed position by the rotation of the two rim elements.

[0021] In this case, the two rim elements are each positioned on the side of the receiving space of the pulley mounting section, and this side is positioned offset in the direction of the pulley rotation axis with respect to at least one cable deflection pulley housed in the receiving space, and is typically used for mounting at least one cable deflection pulley housed in the receiving space. In this case, the mounting of the first rim element is performed on the first side, and the mounting of the second rim element is performed on the side opposite the first side and positioned offset in the direction of the pulley rotation axis. Thus, the two inner surfaces of the pulley mounting side face different planes of at least one cable deflection pulley. As will be apparent to those skilled in the art, the two rim elements do not necessarily have to be positioned inside the two sides, and other surfaces of the side can also be used. For example, if the two rim elements are rotatably mounted on an element projecting forward from the side, the projecting element may be positioned on a plane parallel to the plane defined by the cable deflection pulley.

[0022] The receiving space is usually adjusted to the exact number of individual or multiple cable deflection pulleys, so the width of the receiving space substantially matches the width of multiple cable deflection pulleys arranged in parallel. However, it is known to those skilled in the art that not all cable pulleys need to be in use, that is, ropes do not need to be routed around them.

[0023] According to yet another effective embodiment of the present invention, at least one cable protection bar can be mounted in a manner that is particularly rotatable to two rim elements in each of its longitudinal end regions and oriented parallel to the pulley rotation axis.

[0024] Therefore, the cable protection bar is attached on rim elements that are spaced apart from each other along the pulley rotation axis. One longitudinal end or longitudinal end region of the cable protection bar is attached to the first rim element, and the other longitudinal end or longitudinal end region is attached to the second rim element. In particular, openings are provided in each of the two rim elements for attachment, and the cable protection bar is rotatably accommodated in each opening. In this case, the fixation to prevent the cable protection bar from detaching from the predetermined position of each opening of the rim element is achieved by inserting a fixing pin across the diameter of the cable protection bar, whereby the cable protection bar cannot move in the direction of the pulley rotation axis or can move only very limitedly. In this case, the cable protection bar attached by the two rim elements is configured to have an opening for pushing in the fixing pin at each of its two longitudinal end regions, and the cable protection bar may be fixed in the direction of the pulley rotation axis by providing two fixing pins.

[0025] Furthermore, in this case, a block element extending in the direction of the pulley rotation axis is provided between the two rim elements. The block element functions to make it more difficult to guide the cable whose direction has been changed by the deflection pulley to at least one deflection pulley on the side away from the cable fixing device. In particular, the opening region between the block element and the cable protection bar can be configured not to allow the passage of a cable whose dimensions match at least one cable deflection pulley or a cable spell socket located at the starting end of the cable.

[0026] In this case, the block element can be configured in a plate shape or a tubular shape and can extend from one rim element to the other rim element.

[0027] By providing a block element, it becomes no longer easy to overlook a cable that has been accidentally wound, because the accidentally wound cable not only lies on the cable protection bar on the side away from the cable deflection pulley but also lies on the block element, making it significantly easier to recognize. Eventually, not only the cable protection bar but also the block element on the side facing away from the deflection pulley will be covered by the accidentally wound cable. However, according to the present invention, unintended accidental winding is virtually eliminated, so the possibility of such accidental winding occurring is significantly reduced. However, even in the deflection device according to the present invention, if, due to carelessness or other reasons, the cable to be wound is stretched by the cable protection bar on the side away from the cable deflection pulley, such a state can be visually identified quite easily.

[0028] According to still another embodiment of the present invention, a grip element, particularly a rod-shaped grip element, can be provided to extend between two rim elements parallel to the pulley rotation axis, thereby enabling a simple manual rotation operation of the cable fixing device between the release position and the fixed position.

[0029] To move the cable fixing device from the fixed position to the release position or vice versa, it is useful to provide a grip element so that the switching between the two positions can be easily performed manually. In this process, it is possible to apply a force to the cable fixing device, and it is effective for the grip element to extend between the two rim elements so that the force substantially corresponds to the turning motion required for the position switching, whereby the grip element can be used to apply a force to the two rim elements simultaneously.

[0030] According to still any other development aspect of the present invention, the deflection device can further include at least one locking device for locking the cable fixing device on the pulley holder at the fixed position and / or the release position.

[0031] This type of locking device is used to lock the cable retainer in the released and / or fixed positions. This is particularly useful because it is undesirable for the cable retainer to move unnoticed from the released and / or fixed positions. After all, if the cable retainer moves away from the fixed position, it may fail to prevent the cable guided by the cable deflection pulley from flying out. Similarly, it is undesirable for the cable retainer to move unnoticed from the released position, as this significantly hinders the progress of normal winding and swing-out processes (detachment processes). In some cases, it may no longer be guaranteed that the cable protection bar is actually located outside the winding curve, potentially leading to the cable being wound unintentionally colliding with the cable retainer, or, in the worst case, unintentionally straddling the cable retainer, causing the cable being wound to be pulled by the cable protection bar on the opposite side of the cable deflection pulley.

[0032] Therefore, for the reasons mentioned above, a cable fixing device is useful if it allows for reliable positioning in the released and / or fixed positions.

[0033] According to yet another advantageous embodiment of the present invention, at least one locking device includes a locking opening and a corresponding locking portion, wherein one component of the locking device is located on the cable fixing device and the other component is located on the pulley mounting portion, preferably at least one locking device has a preloaded latching pin as the locking portion, a corresponding latching hole as the locking opening, and a deflection element, wherein when the cable fixing device moves to a fixed position and / or a released position, the deflection element causes the latching pin to change position relative to its preloaded position, and after reaching the fixed position and / or a released position, the preloaded latching pin can be configured to engage with the locking opening and be in the same position as the latch pin.

[0034] For example, an element curved toward the central region of the receiving space can be used as a deflection element. When a pivoting motion is performed to transition to the release position and / or fixed position, this element pushes the locking element, which is preloaded by the tension element, in the opposite direction to the preloading direction, and after reaching the predetermined position, it becomes possible to engage it with an opening, a stepped chamfer, etc.

[0035] In this way, release from the held position is only possible by moving the locking element, which has been preloaded by the tension element, against its spring force. The locking element is no longer engaged with its mating partner, and the cable fixing device can once again move in accordance with the pivoting motion.

[0036] According to yet another modification of the present invention, the locking device includes, in a fixed position, a cable protection bar and a receiving opening for the cable protection bar located on opposite sides of the receiving space of the pulley mounting portion, and disengagement from the fixed position is possible only after the cable protection bar has been released from the receiving opening.

[0037] According to this embodiment, the cable protection bar is part of the locking device, and the cable fixing device becomes movable from the released and / or fixed positions only when the cable protection bar is removed from the corresponding opening fixedly connected to the side of the pulley mounting portion. Furthermore, in this case, the openings extending from or formed on each of the two rim elements and the two sides are aligned to be equated with each other in the released and / or fixed positions, and the cable fixing device can be locked by inserting the cable protection bar into the equated openings of the rim elements and the openings extending from or formed on the sides.

[0038] According to yet another optional modification of the present invention, at least two cable protection bars are provided, which act in different radial regions of at least one cable deflection pulley, such that the respective operating regions of the two cable protection bars include an angle greater than 60°, preferably greater than 75°, and more preferably greater than 90°, relative to each other in the circumferential direction of the cable deflection pulley.

[0039] To ensure that cables deflected by a cable deflection pulley remain in their intended guide along the wide circumferential area of ​​the cable deflection pulley, it is useful to arrange multiple cable protection bars spaced apart from each other in the circumferential direction of the cable deflection pulley. This ensures that the cables remain within the guide of the cable deflection pulley at two spaced-apart points in the circumferential direction of the cable deflection pulley. This ensures that the cables are guided by the guide provided on the cable deflection pulley across the wide circumferential area of ​​the cable deflection pulley.

[0040] In this case, in any further modification, the two cable protection bars can be configured such that each extends between the two rim elements, and / or the two cable protection bars are oriented parallel to each other.

[0041] The present invention further relates to a system comprising a deflection device and a cable according to any of the embodiments described above, wherein the dimensions of the cable, particularly its diameter, are compatible with at least one cable deflection pulley, the direction of which is changed by the deflection pulley, and the cable is preferably a steel cable.

[0042] The present invention further relates to a work machine or lifting device such as a crane or mobile crane, equipped with a deflection device according to any of the embodiments described above or the system described in the preceding paragraph.

[0043] Here, a useful configuration is that the deflection device is positioned on the boom, particularly the boom head of a telescopic boom, and is provided to form a cable connection to a hook block that is held by the boom.

[0044] Further features, details, and advantages of the present invention will be revealed by embodiments described below with reference to the drawings. The figures are as follows. [Brief explanation of the drawing]

[0045] [Figure 1] Figure 1 is a side view showing an embodiment of a work machine or lifting device according to the present invention. [Figure 2] Figure 2 is a front view of a boom head relating to the conventional technology. [Figure 3] Figure 3 is a side view of a conventional deflection device and a hook block attached to the deflection device. [Figure 4.1] Figure 4.1 is a perspective view of a cable fixing device according to the first embodiment of the present invention. [Figure 4.2] Figure 4.2 is a side view showing a deflection device according to the first embodiment of the present invention with the cable fixing device in the released position. [Figure 4.3] Figure 4.3 is a side view showing a deflection device according to the first embodiment of the present invention with the cable fixing device in a fixed position. [Figure 4.4] Figure 4.4 is a perspective view showing the deflection device according to the first embodiment with the cable fixing device in a fixed position. [Figure 5.1] Figure 5.1 is a perspective view of a cable fixing device according to a second embodiment of the present invention. [Figure 5.2] Figure 5.2 is a perspective view showing the deflection device of the second embodiment with the cable fixing device in the released position. [Figure 5.3] Figure 5.3 is a perspective view showing the deflection device of the second embodiment with the cable fixing device in a fixed position. [Figure 6.1] Figure 6.1 is a perspective view of a cable fixing device according to a third embodiment of the present invention. [Figure 6.2] Figure 6.2 is a perspective view showing the deflection device with the cable fixing device of the third embodiment in the released position. [Figure 6.3] Figure 6.3 is a cross-sectional side view of the deflection device equipped with the cable fixing device of the third embodiment in the release position, with the winding curve added. [Figure 6.4] Figure 6.4 is a perspective view showing the deflection device with the cable fixing device of the third embodiment in a fixed position. [Modes for carrying out the invention]

[0046] Figure 1 is a side view showing an embodiment of a lifting device (lifting device, hoisting device) or work machine 1 according to the present invention. The work machine 1 of the illustrated embodiment is a mobile crane equipped with a movable lower carriage 2, an upper carriage 3 rotatably mounted on the lower carriage 2, and a telescopic boom 4 positioned on the upper carriage 3, the boom having a boom head 11 at the end of its innermost telescopic portion. A lifting cable (lifting wire rope) 5 is guided from a lifting cable winch by a plurality of deflection pulleys (deflection sheaves) on the boom head 11 and passes between the deflection pulley 9 and the hook block 6. The boom head 11 may be provided with at least one deflection device 100 according to the present invention to deflect the lifting cable 5. However, the present invention is not limited to this embodiment.

[0047] Figure 2 shows an embodiment of a boom head 11 comprising an upper pulley group consisting of cable deflection pulleys 10 and a lower pulley group consisting of cable deflection pulleys 9. According to the present invention, each pulley group can be formed by a deflection device 100 according to the present invention to prevent the cable 5 from protruding from each pulley group and to reliably prevent or easily identify incorrect winding (relaying, leaving). However, the present invention also includes a configuration in which only one of the two pulley groups is formed by a deflection device 100 according to the present invention.

[0048] For example, as shown in Figure 2, when multiple deflection pulleys 9 are arranged side by side, the cable fixing device 14 will spread out to cover all of the side by side deflection pulleys 9.

[0049] Figure 3 is a side view of a conventional cable deflection device, showing a telescopic boom 4 and a pulley head 8 located at its front end. The upper cable deflection pulley 10, which forms the upper pulley group, deflects (changes direction of) the lift cable 5 downward toward the hook block 6. Cable deflection pulleys (not shown in Figure 3) deflect the cable in the opposite direction toward the pulley head 8, where the cable 5 is passed through the cable deflection pulley 9 of the lower pulley group, and then guided again toward the hook block 6. Multiple loops are formed between the pulley head 8 and the hook block 6, depending on the number of cable deflection pulleys 9.

[0050] Figure 3 shows that, because the cable protection bar 7 was not accidentally removed during the winding process, the cable 5, which was deflected (changed direction) by the cable deflection pulley 9, extends away from the cable deflection pulley 9 and along the side of the cable protection bar 7. The correct guidance for the cable 5 is through the area between the cable deflection pulley 9 and the cable protection bar 7, because only in this way is it possible to prevent the cable 5 from flying out of the guidance of the cable deflection pulley 9 under certain conditions. Furthermore, a second cable protection bar 13 positioned in the upper area of ​​the cable deflection pulley 9 can also be seen.

[0051] Figure 4.1 is a perspective view of a cable fixing device 14 according to the present invention, which is rotatably mounted on a pulley head 8. This cable fixing device has a first rim element (arm element) 21 and a second rim element 23, each having an opening used for mounting to the pulley head 8. In this example, the two rim elements 21 and 23 are spaced apart from each other in the direction of the pulley rotation axis and are connected to each other by a cable protection bar 7 extending parallel to the pulley rotation axis. To ensure that the cable fixing device 14 can be operated easily and reliably, a grip element 12 may be provided that extends in the direction of the pulley rotation axis and connects the two rim elements 21 and 23 to each other.

[0052] Furthermore, an optional block element 32 is also shown, which extends between the two rim elements 21 and 23. The significance of this element will be explained in more detail when the drawings are described further, but stopper elements 20 and 33 can be seen projecting from the block element 32 in the direction of the pulley rotation axis, and these stopper elements function to precisely position the cable fixing device 14 in the fixed position. The stoppers 34 and 35 contact the components of the pulley head 8 when the cable fixing device 14 reaches the released position.

[0053] The dashed line 25 shows the trajectory of the position of a preloadable locking element located on the pulley head 8, which is pushed back by the bent portion 231 of the rim element or subjected to tension as the cable fixing device 14 moves to the fixed position, and after reaching the fixed position, snaps into the opening 24 due to the spring preload generated by the bent portion 231.

[0054] Similarly, the dashed line 22 indicates the trajectory of the position of a preloadable locking element located on the pulley head 8. This element pushes the first rim element 21 with a predetermined force generated by preloading as the cable fixing device 14 moves to the release position, and after reaching the release position, it is fitted into the opening 28 by preloading, thereby fixing the cable fixing device 14 in the release position.

[0055] In this way, as will be clear when viewed in conjunction with the subsequent drawings, the deflection device 100 is configured to move the fixing device 14 to the open position, i.e., the released position, by rotational motion around the pivot axis 15. In this case, for example, a locking bolt 17 extends beyond the rim element 21 along the curve 22 of the cable fixing device 14 and locks into the opening 28. This locking is performed automatically by the spring return of the locking bolt 17, and as a result, the cable fixing device 14 is fixed in the open position without requiring any additional installation work.

[0056] Figure 4.2 is a side view of the deflection device 100 when the cable fixing device 14 is in the open or released position. In this position, the cable fixing device 14 rotates around a pivot axis 15 that extends parallel to the pulley rotation axis, thereby ensuring that the lift cable 5 is reliably wound (wrapped). During the winding process, the lift cable 5 extends along the winding curve 16 (shown by a dashed line) and is guided to the hook block 6 via the cable pulley 9. It is shown that the cable protection bar 7 of the cable fixing device 14 is not located in the region between the winding curve 16 and the outer surface of the cable deflection pulley 9 due to the pivot to the released position, thereby eliminating the risk that the cable being wound during the winding process will be guided along the cable protection bar 7 on the side away from the cable deflection pulley 9.

[0057] Here, the winding curve represents the position of the cable start end during the winding process. Preferably, the winding curve is set for one side of the cable pulley by feeding the cable almost horizontally to the upper end point of the cable deflection pulley and then feeding a further length of cable to the cable start end guided beyond the upper end point of the cable deflection pulley.

[0058] Please note that in order to achieve frictionless winding, it is also necessary to remove the second cable protection bar 13, which can be placed in the upper region of the cable deflection pulley 9.

[0059] To lock the cable fixing device 14 in a fixed position, a receiving element 40 is provided that protrudes forward from the pulley head 8, and this receiving element has a preloadable locking pin 18 at the end away from the pulley head 8. This locking pin can cooperate with a corresponding locking opening 24 formed in one of the two rim elements of the fixing device 14, establishing a locking connection when the fixing device 14 moves to the fixed position. A similarly functioning locking device is also provided to hold the fixing device 14 in the released position.

[0060] Figure 4.3 is a side view of the deflection device 100 when the cable fixing device 14 is in the closed or fixed position. In this position, the cable fixing device 14 is positioned so that the lift cable 5 does not protrude from at least one cable deflection pulley 9. The cable fixing device 14 is locked by a locking bolt 18, which, in the closed position, is guided along the bent portion 231 and the curved portion 25 on the rim element 23 and locks into the opening 24. This lock ensures that the lift cable 5 is pressed tightly against the cable pulley 9, thereby ensuring stable and reliable guidance of the cable 5.

[0061] In the structure of the cable fixing device 14 into which the locking bolts 18 and 19 are combined, in the prior art it was generally necessary to manually press the lift cable 5 directly into the cable groove of the cable pulley 9 in order to enable the attachment of the cable protection bar, but this is no longer necessary and is reliably done automatically by contact with the cable fixing device 14 when moving to the fixed position.

[0062] Figure 4.4 is a perspective view of the lower portion of the pulley head 8 with the cable fixing device 14 in the closed position. In this state, the locking pin 17 can also be seen, and this pin works in cooperation with the opening 26 (shown, for example, in Figure 4.1) to securely lock the cable fixing device 14 in the open position.

[0063] Furthermore, to ensure that the fixing device 14 is securely fixed in place, openings are provided in each of the two rim elements 21 and 23, and these openings cooperate with a locking device fixed to the pulley head 8 via a receiving element 40. The latching pin 19 of the receiving element 41 can be seen on the left side shown in Figure 4.4, and the latching pin 18 of the receiving element 40 can be seen on the right side shown, and these elements are each fixed to the pulley head 8.

[0064] Figure 5.1 shows a second embodiment of the present invention, in which the basic idea of ​​the cable fixing device's rotation is retained, but the method of locking the pulley head in the fixed position is different. Therefore, the cable fixing device 14 is locked using the cable protection bar 7 and the openings in the tip region of each rim element into which the cable protection bar 7 can be inserted. To ensure that the cable protection bar 7 is securely held, lynch pins 28 and 29 can be provided in the region of each longitudinal end of the bar, and secure holding is ensured after these lynch pins are passed through the openings of the cable fixing device 14.

[0065] Figure 5.2 shows the deflection device 100 according to the second embodiment with the fixing device 14 in the open position. As already described, the cable protection bar 7 is used for locking in the fixed position. In the open position (release position), the cable protection bar 7 is removed, and as a result the cable fixing device 14 can be moved to the release position, allowing the lift cable 5 to be routed along a predetermined winding curve 16.

[0066] The cable fixing device 14 moves to the open position by rotational movement around the pivot axis 15. At this time, the lynch pins 28 and 29 must be removed in advance so that the cable protection bar 7 can be removed laterally from the openings of the receiving elements 30 and 31 located on the left and right sides of the pulley group on the pulley head 8. After the cable protection bar 7 is removed, the cable fixing device 14 can be moved upward to the open position around the pivot axis 15 without using the removed cable protection bar 7. Then, the locking bolt 17, which has already been described in the above embodiment, automatically locks the cable fixing device 14 in the open position.

[0067] In this way, sufficient space is secured in the radial direction of the cable deflection pulley 9, allowing the starting end of the cable, particularly the closed-type spelta socket 36 shown in Figure 5.2, to be guided downward and wound correctly.

[0068] Figure 5.3 is a perspective view of the deflection device 14 in a fixed position in the second embodiment. Compared with the aforementioned Figure 5.2, it can be seen that the cable start end and the closed-type sperta socket 36, which is generally located at the cable start end, cannot pass through. This is because the block element 32 prevents direct guidance along the outside of the cable protection bar 7. In this case, the illustrated space between the cable protection bar 7 and the block element 32 is dimensioned so that the closed-type sperta socket 36 cannot pass through.

[0069] The deflection device according to the second embodiment, which includes the illustrated cable fixing device 14, can be easily retrofitted to an existing pulley head 8, as it uses existing receiving sections 30 and 31 and is compatible with the same pre-installed components as the cable protection bar 7 and lynch pins 28, 29 used in the prior art.

[0070] Figure 6.1 is a perspective view showing a third embodiment of the deflection device 100, in which the cable fixing device 14 not only has a cable protection bar 7 but also a second cable protection bar 13 positioned near a point above the cable deflection pulley 9, which is generally housed in a pulley head 8.

[0071] Similar to the first cable protection bar 7, the second cable protection bar 13 also extends from one rim element to the other rim element, parallel to the pulley rotation axis or pivot axis 15. The advantage of this is that both the first cable protection bar 7 and the second cable protection bar 13 can be moved to a predetermined position with only one operation, specifically the pivoting operation of the cable fixing device 14 of the deflection device 100 according to the third embodiment, thereby completely eliminating, or at least significantly reducing, the possibility of incorrect winding occurring during the winding process.

[0072] Furthermore, it is understood that the opening 25 is used not only for locking in one of the released or fixed positions, but also for locking in both. In this case, for each of the two movements for transitioning to the released or fixed position, the rim element is provided with correspondingly shaped bends that can push back both the locking pin in the released position and the locking pin in the fixed position, thereby causing the locking pin to engage when it is aligned with the opening 26, and locking the cable fixing device 14 in the corresponding position.

[0073] For example, even if both cable protection bars 7 and 13 are removed for replacement during maintenance, in order to maintain sufficient stability of the cable fixing device 14, a stabilizing element 27 can be further provided in addition to the grip-shaped holder 12, preferably in the area of ​​the second cable protection bar 13, to connect the two rim elements 21 and 23 to each other. In this case, the stabilizing element 27 also serves a blocking function.

[0074] Figure 6.2 shows the deflection device 100 with the cable fixing device 14 in the open position. To reach the open position, the cable fixing device 14 moves upward by rotation around the pivot axis 15, and the cable protection bars 7 and 13 move to the open position simultaneously. This eliminates the need to remove either of the two cable protection bars 7 and 13 from the pulley head 8, thus simplifying the winding process. The pulley rotation axis is also shown by a dashed line parallel to the pivot axis 15.

[0075] Figure 6.3 is a side cross-sectional view of the cable fixing device 14 in the released position. In this state, neither the first cable protection bar 7 nor the second cable protection bar 13 interferes with the winding curve 16, and the winding curve 16 passes between each cable protection bar 7, 13 and the radial outer surface of the cable deflection pulley 9. This means that in a normal winding process, each cable protection bar 7, 13 does not collide with the target cable to be wound or the closed-type Spelta socket located at the starting end of the cable to be wound, and a normal winding process can be carried out. The advantage of this is that the cable fixing device 14 moves both cable protection bars 7, 13 from the fixed position to their respective released positions with a single pivoting motion. Therefore, separate work processes to remove the two cable protection bars 7, 13 are unnecessary in order to carry out the winding process.

[0076] In this case, a major advantage of the winding process is that it eliminates the need for removable, non-fixed parts, thus eliminating the risk of forgotten parts falling from heights. This embodiment also eliminates this risk factor.

[0077] Figure 6.4 shows the deflection device 100 in the closed position. In this position, the cable fixing device 14 is positioned to ensure that the lift cable 5 travels safely within the cable pulley 9 and is prevented from flying out (a state in which the rod and pulley do not come into contact). In this case, the cable fixing device 14 automatically locks after reaching the open position and / or the fixed position, because, in this case as well, when it reaches the corresponding position, at least one locking bolt engages with the opening in the rim element. [Explanation of symbols]

[0078] 1. Working Machinery 2 Lower bogie 3. Upper bogie 4. Telescopic boom 5 Lift Cables 6 Hook Blocks 7 Cable protection bar 8 Pulley heads 9. Cable deflection pulleys (lower pulley group) 10 Cable deflection pulleys (upper pulley group) 11 Boomhead 12 Grip Elements 13. Second Cable Protection Bar 14 Cable fixing device 15. Swivel axis 16. Winding curve 17. Locking pin 18. Locking bolt 19. Locking bolt 20 Stopper elements 21 First rim element 22 curve 23 Second rim element 24 aperture 25 Aperture 26 Aperture 27 Stabilizing elements 28 Lynchpin 29 Lynchpin 30 Acceptance Factors 31 Acceptance Factors 32 block elements 33 Stopper elements 34 Stopper 35 Stopper 36 Closed-type Spelta sockets 40 Acceptance Factors 41 Acceptance Factors 100 deflection device 231 Bending section

Claims

1. A pulley mounting section for supporting at least one cable deflection pulley, At least one cable deflection pulley is mounted on the pulley mounting portion so as to be rotatable around the pulley rotation axis, A cable deflection device comprising a cable fixing device for ensuring the correct winding of the cable in the cable deflection pulley, The cable fixing device is rotatable around the pivot axis relative to the pulley mounting portion so as to switch between a fixed position in which the cable deflected by the cable deflection pulley is fixed to the cable deflection pulley and a released position in which the cable deflected by the cable deflection pulley is not fixed to the cable deflection pulley. The pivot axis extends parallel to the pulley rotation axis. A cable deflection device characterized by the following features.

2. In the deflection device according to claim 1, The cable fixing device has at least one cable protection bar, which is configured to restrict the cable guided by the cable deflection pulley from moving radially away from the cable deflection pulley when the cable fixing device is in a fixed position. Preferably, the cable deflection device is such that the at least one cable protection bar is oriented so that its longitudinal axis is parallel to the pulley rotation axis and / or is mounted so that it can pivot around its longitudinal axis.

3. In the deflection device according to claim 2, The at least one cable protection bar is positioned radially larger from the at least one cable deflection pulley in the released position than in the fixed position, thereby enabling the correct winding of the cable on the at least one cable deflection pulley, and the cable to be wound is positioned between the at least one cable deflection pulley and the at least one cable protection bar. Preferably, the at least one cable protection bar is located further radially from the at least one cable deflection pulley than the winding curve of the cable to be wound, particularly a steel cable, which is sized to match the at least one cable deflection pulley, when the deflection device is in the released position and when the deflection device is oriented toward the target direction.

4. In the deflection device according to any one of claims 1 to 3, The pivot axis is positioned radially offset with respect to the pulley rotation axis and the at least one cable deflection pulley in the deflection device.

5. In the deflection device according to any one of claims 1 to 4, The cable fixing device has two rim elements, the rim elements being rotatably mounted on opposing sides of the receiving space of the pulley mounting portion that accommodates the at least one cable deflection pulley, and in particular the rotatable mounting of the two rim elements forms the pivot axis of the cable fixing device, preferably the two rim elements are identically configured to each other.

6. In the deflection device according to claim 5, A deflection device in which at least one cable protection bar is rotatably attached to the two rim elements in particular at their respective longitudinal end regions and oriented parallel to the pulley rotation axis.

7. In the deflection device according to claim 5 or 6, A deflection device is provided between the two rim elements, with a block element extending in the direction of the pulley rotation axis, wherein the block element functions to make it more difficult to guide the cable deflected by the deflection pulley to at least one deflection pulley on the side away from the cable fixing device, and in particular, the opening region between the block element and the cable protection bar is configured not to allow the passage of a cable sized to fit the at least one cable deflection pulley, or a cable sperta socket located at the beginning of that cable.

8. In the deflection device according to any one of claims 5 to 7, The deflection device further includes a gripping element, preferably a rod-shaped gripping element, which extends between the two rim elements parallel to the pulley rotation axis, and which allows the cable fixing device to be easily rotated manually between the released position and the fixed position.

9. In the deflection device according to any one of claims 1 to 8, Furthermore, the deflection device has at least one locking device for locking the cable fixing device to the pulley holder in the fixed position and / or the released position.

10. In the deflection device according to claim 9, The at least one locking device includes a locking opening and a corresponding locking portion, where one component of the locking device is located on the cable fixing device and the other component is located on the pulley mounting portion. Preferably, the locking device has at least one preloaded locking pin as a locking portion, a corresponding locking hole as a locking opening, and a deflection element, wherein when the cable fixing device moves to the fixed position and / or the released position, the deflection element causes the locking pin to change position relative to its preloaded position, and after reaching the fixed position and / or the released position, the preloaded locking pin engages with the locking opening and becomes the same position as the locking pin.

11. A deflection device described in claim 9, having the features of claim 2, The locking device includes, in the fixed position, the cable protection bar and a receiving opening for the cable protection bar located on opposite sides of the receiving space of the pulley mounting portion, and the deflection device is capable of being released from the fixed position only after the cable protection bar has been released from the receiving opening.

12. In the deflection device according to any one of claims 1 to 11, A deflection device comprising at least two cable protection bars that act in different radial regions of at least one cable deflection pulley, wherein the respective operating regions of the two cable protection bars are at angles greater than 60°, preferably greater than 75°, and more preferably greater than 90°, relative to each other in the circumferential direction of the cable deflection pulley.

13. A system comprising a deflection device and a cable according to any one of claims 1 to 12, wherein the dimensions of the cable, particularly its diameter, are suitable for the at least one cable deflection pulley, and the cable is preferably a steel cable.

14. A lifting device, for example, a crane or a mobile crane, comprising a deflection device according to any one of claims 1 to 12 or a system according to claim 13.

15. A lifting device according to claim 14, wherein the deflection device is positioned at the boom head of a boom, particularly at the boom head of a telescopic boom, and is used to form a cable connection to a hook block held by the boom.

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