EP1405818A1 - Winding device for winding and unwinding a cable of a cable winch - Google Patents

Abstract

The winder (1), to wind and unwind a cable (14) at a winch (21) with an external cable guide unit (15), has a guide roller and a powered cable drum (22). A cable feed in front of the drum, operates with an accelerated or retarded action on the cable to apply a draw tension on the cable between it and the drum. The cable feed has at least two cable guide rollers positioned so that the incoming cable is led at right angles to the drum axis between them. The incoming cable passes around the initial roller by 270degrees, and passes around the second roller by 90degrees before moving to the drum.

Description

The invention relates to a device for winding and unwinding a rope of a winch with tension on the rope as well as a winch.

In various technical areas, such as construction, for temporary cable cars, for logging in Areas that are difficult to access are partly with cable winches considerable rope lengths used. For this, usually used portable winches that quickly become one Get ready for work. The transport of the Winch to the job can be done differently e.g. as an attachment, on a sled, per Helicopter etc.

Such winches are usually connected directly to the Person operating the cable winch, since load changes occur most likely a check of the rope guide or the rope tension is possible. This is in several ways disadvantageous. The operator must know and during operation the ascender must be highly concentrated to a non-optimal Detect rope tension and / or rope guide and to compensate for this by appropriate operation. deviations of the optimal conditions have a significant Influence on the lifespan of all components involved, especially the rope and pose safety risks. While loading or unloading the winch The winch operator is the means of transport not active. This workflow is not user-friendly. As a rule between the location of the winch and the pick-up or unloading point of the object to be transported there is also a considerable spatial distance, an additional person is required for the operational process. This leads to additional operating costs.

In day-to-day operations, it has also been shown that a high and narrow rope drum for the service life of a rope is advantageous. Due to the larger size of the Drum, the rope is subject to less mechanical stress (larger radius of curvature, fewer layers) and the rope can come off the drum at a higher speed be wound up or unwound. Such dimensions require however adapted facilities for leadership and also for tensioning the rope during winding or unwinding.

Appropriate devices for guiding and tensioning a rope when winding or unwinding a winch are already described in JP 10-036084 and WO 01/12536.

JP 10-036084 describes a device which, in addition to a swivel arm with a guide roller from one in the context of Cable winch fixed tensioning device exists. The tensioning device consists of a roller with circumferential teeth and two gears meshing laterally with a toothed circle of the roller. The rope is in a grooved circumferential profile between the role and the two wheels clamped. The role is via a transmission mechanism from the rope drum driven. Due to the rope tension it is avoided that the swivel arm moves uncontrolled when no load is on the winch is lying.

A device according to WO 01/12536 contains two one inside the other intermeshing spur gears, the rope between the two, which are in resilient engagement with one another Guided wheels in a centrally arranged circumferential groove and is excited. Lateral guidance of the rope on the drum is driven by a parallel to the drum axis Movement of the clamping device achieved. This drive for the translational movement of the clamping device requires additional control effort.

The object of the invention is to overcome the disadvantages of the known to avoid, in particular an improved winding device for tensioning and guiding a rope when opening or closing To provide unwinding.

The task is with a winding device according to the Features of the independent claim solved.

A winding device according to the invention for winding and unwinding a rope on a rope drum of a rope winch has a guide roller and a rope conveyor device, which is located upstream of the driven rope drum and can be driven ahead or in advance of the rope drum, for applying tension to the rope between the rope drum and the rope conveyor device. The rope conveying device has at least two rollers guiding the rope, one of the rollers being driven. The winding device is characterized by such an arrangement of the driven roller and the guide roller in relation to the incoming rope that the incoming rope is guided into the winding device in approximately a direction perpendicular to the cable drum axis between the driven roller and the guide roller. The winding device is further characterized in that the incoming rope first wraps around the driven roller at approximately 270 °, subsequently wraps around the guide roller at approximately 90 ° and is further fed to the cable drum.
It is essential that the wrap angle of the driven roller and the guide roller is approximately 360 °. The rope entering between the rollers is thereby removed from the guide roller in an approximately parallel orientation to the rope entering the winding device and guided onto the rope drum.

The term "upstream" means that the Winding device during the winding process in the direction of the rope feed is arranged in front of the cable drum.

With the term train loading is a tension and thus a tightening of the rope between the rope drum and the inventive Understand winding device. The terms lagging or leading define that the driven Role of the rope conveyor and the rope drum different Have rotational speeds. When winding is driven by a lower rotational speed of the Role of the rope conveyor against the Rope drum generates the tensile loading of the rope (lagging), when unwinding, the driven roller of the cable conveyor device rotates faster than the rope drum (leading).

In the rope conveyor, the rope is between at least led two roles. However, more than two roles are preferred provided, the other roles the rope on the drivable Lead role. Corresponding embodiments are known to the person skilled in the art known for the respective roles.

The leadership role takes over the leadership according to the invention the rope when winding onto the rope drum or when Rinse out the rope guide to the rope conveyor. The leading role is in interaction with one initially the carefully wound rope during operation Apply a rope winding to the previous one for sure. This requires the rope to be subjected to tension. An overlapping of rope windings with the resulting ones negative consequences are avoided.

The term "incoming" rope means the direction in which the one with the attachment point for the load Rope end in the winding device and on to the rope drum is moved.

The axis of rotation of the rope drum is closed as the rope drum axis understand. A direction extends perpendicular to the rope drum axis radially away from the cable drum axis. in the The scope of the invention can change the direction of the rope if there is between the driven roller and the guide roller will deviate from this direction by a maximum of 10 °. Likewise the feeding of the rope between the driven can be imagined Role and the leadership role take place in one direction which are parallel to one of the directions previously explained is displaced perpendicular to the cable drum axis. Both the angular Deviation as well as the parallel displacement of the Rope entry direction can be caused by constructive details the winch. They hang e.g. from the center distance and in relation to the diameter of the drive and guide roller to the diameter of the rope drum and the thickness of the rope package wound on the drum. With increasing outside diameter the rope drum takes the wrap angle of the Leadership role. However, these deviations do not leave the scope of the invention. The direction of the incoming is preferred Rope aligned perpendicular to the rope drum axis.

The degree of wrap of the driven roller or the guide roller through the rope is not to be understood as constant. The values of 270 ° for the driven roller and 90 ° for the leadership role are rather than averages with a Fluctuation range of +/- 15 ° (driven roller or guide roller) to understand. The range of fluctuation represents Functionality of the winding device despite possible Manufacturing deviations or design constraints such as a compact construction.

The winding device advantageously comprises a carrier element, on which the cable conveyor and the guide roller are arranged. The possibility of joint arrangement coordinated interaction on the support element of the components. By a suitable design of the Carrier element can occur in the winding device Forces reduced or in the best case canceled against each other become. A technically simple overall construction of the A winch is therefore possible.

It is further advantageous if the carrier element is pivotally arranged on the frame of the winch.

The term "pivotable" here means a rotary movement the support element about an axis. The extent of the swivel movement depends on the masses of the winch, in particular the winding device, the rope drum, i.e. the width of the Rope drum and the distance between the winding device and the rope drum. The pivoting is preferably one Middle position of the winding device. Advantageously falls the middle position of the rotary movement of the carrier element with the direction of the incoming rope.

It is also advantageous if the cable conveyor is on a first section of the carrier element and the guide roller arranged on a second section of the carrier element and the sections are arranged at an angle.

Due to the geometry between the cable entry, the tensioning element and the course of the rope crosses the guide organ. The subdivision of the support element into two sections and the angular arrangement of the two sections to each other enables a non-contact crossing of the rope inside the device when winding or unwinding. As rope entry is to be understood an arrangement that the rope on the stop side under possibly necessary change of direction in the device introduces. The rope thereby enters a fixed one spatial alignment in and out of the device out. The angle is chosen so that even with different Rope strengths a non-contact crossing. Non-contact means that there is no touch the intersecting rope sections takes place. The angles enclosed by the two support element sections is between 150 ° and 179 °, preferably between 160 ° and 175 °.

A winding device with a cable conveying device is preferred, which the rope in the rope conveyor more than a pressure roller on the driven role leads. Different embodiments for the driven roller and the pressure rollers Known specialist. So are the driven roller or the pressure rollers for example wheels with a circumferential Provide recess for guiding the rope. The driven The roller and the pressure rollers can both be in direct Intervention with each other as well as without intervention his. A sufficient number of pressure rollers is guaranteed a secure power transmission, i.e. the transport of the rope. In addition, a larger number of pressure rollers is reduced the stress on the rope due to the distribution of the Force action. The pressure rollers are preferably designed such that that they are spring-loaded, i.e. by spring force pressed against the driven roller. So that becomes a excessive load on the rope and the device possible load changes in the rope are avoided.

In particular, a winding device with a driven Provide roller that can be driven hydrostatically. The drive the driven roller performs in cooperation with the Pressure rollers for tensioning the rope in the device. The Drive must be designed so that a minimum voltage for the rope, but the drive cannot be one Strain on the rope goes beyond what is necessary. Hydrostatic drives have good controllability on. Details of such controls and components are the Known specialist.

A winding device can also be advantageously implemented, if the cable conveyor is independent of the Cable drum is drivable. The independent drive The rope conveyor ensures that the rope tension also with speed changes or with load changes is maintained. Even with differences in the Cable drum version as well as changes in the rope layers with, for example, almost completely ejected rope are not complex adaptation measures between the Wikkel device and the rope drum in terms of tuning control and to maintain train loading necessary.

Another aspect of the device is a sensor that is on the support element is attached. The sensor serves as a monitoring device for the rope, especially around in the case of a Rope break an emergency stop of the winch, i.e. the winding device or to be able to trigger the rope drum. Preferably the sensor is a sensing roller.

One aspect of the device is such an arrangement of the Carrier element on the frame that the cable under tension Controls pivoting of the support member. Because of the continuous maintained rope tension becomes the rope length between the winding device and the cable drum on the minimized technical distance. Because the rope carefully is wound on the rope drum, the carrier element follows the winding device of the relative rope layer on the drum. The rope thus exercises the transfer function for the swiveling movement out. In addition to this pivoting of the support element are the aspect ratios of the sections of the carrier element to select on both sides of the swivel axis. The lengths are preferably taking into account the mass ratios chosen so that the leverage of the two Largely remove sections in the pivot point.

A device is also advantageously designed if the Swivel axis of the support element with the orientation of the rope coincides when entering the winding device. This Alignment avoids further stress on the rope and supports the automatic swiveling of the device.

The rope is held by the guide roller of the winding device wound up between the lateral boundaries of the cable drum. Once a winding of the rope is one of these limits reached, this causes a reversal of the winding course, i.e. the side-by-side stringing of the following cable windings takes place in a direction rotated by 180 °.

The described winding device according to the invention allows safe and economical operation of the winch. There rope tension can be maintained continuously, the operator no longer has to work on site of the system. Its activity can be carried out from a remote location. This is possible, for example, using a remote control. This system allows the operator to become monotonous Relieve work and sometimes stands for others Activities available.

Before the winding device is an introducer for that Rope arranged. This introductory body advantageously takes over the task of rejecting or reeling out Ropes in a defined direction of the invention Feed winding device. Usually is in operation the winch installed in one place and the rope from there out to the places of use. These positions can be in different Directions lie so that the introducer is required. The introductory body can be different design, for example by an arrangement of rollers, by a swiveling wheel arrangement or by a funnel-shaped hollow body. Those skilled in the art are familiar with such specific executive bodies.

Another aspect of the winder is a control device to monitor the ejected rope length. A such a control device can, for example, in the form of a Auto switch that is on the driven roller or the Guide roller is placed, and one arranged on the carrier element Be trained receiver. It is also conceivable a sensor on the gear of the rope drum. Correspondingly more Control devices are known to the person skilled in the art. By means of a Such a device, the operator can use a Control program are relieved. The rope can be, for example at high speed almost up to one previously defined rope length and then from Operator slower with a speed that he can control and checks to the specific place of use of the rope be performed. It is also possible to adjust the ejection or winding speed of the rope with previously defined rope lengths to vary, for example if the rope is over a support runs and a load change occurs there.

Figur 1:

eine seitliche Ansicht der Wickel-Vorrichtung;

Figur 2:

eine Sicht auf die Vorrichtung in Seilrichtung; und

Figur 3:

eine Ansicht des Systems aus Seilwinde und Vorrichtung.

The invention is illustrated by the following figures. Show it :

Figure 1:

a side view of the winding device;

Figure 2:

a view of the device in the rope direction; and

Figure 3:

a view of the system of winch and device.

The figures provide a schematic representation of the invention again and are not to scale.

The winding device 1 with the carrier element 6 and the cable conveyor 27 containing the pressure rollers 9 and driven roller 7, and the guide roller 10 shows figure 1. The rope 14 is made up of the rope entry 15 the cable guide rollers 2, the bracket 4 and the bearing 5, the Winding device 1 supplied. The cable entry 15 is with the bracket 4 pivotally attached to the frame 25. Through the Rope guide 3, the rope 14 arrives on the rope conveyor 27 and is driven by the pressure rollers 9 to the Roll 7 created. The pressure rollers 9 are resilient on the carrier element 6 attached. The carrier element 6 is by means of the holder 17 and the bearings 16 pivotally attached to the frame 25. The roller 7 is driven by a hydrostatic drive 8. The rope 14 is on the driven roller 7 after a turn of approximately 270 ° (starting from the direction of entry into the device) from the driven roller 7 out on the guide roller 10. From the leadership role 10 the rope 14 is wound on the rope drum 22. A touch roller 11 is used for rope monitoring. In the event of a rope break pivots the feeler roller 11 and activates a contact 13, which is a standstill of the winch 21, i.e. the rope drum 22 and brings about the winding device 1. The Wikkel device 1 is designed to be different Rope strengths can be tensioned and guided through them.

The kink 18 of the carrier element 6 can be clearly seen in FIG. The kink 18 lies in the entry point of the rope 14 in the winding device 1. The cable entry 15 is in not shown in this figure. The rope 14 runs around the driven Roll 7, whose outer circumference is shown in the profile section is. The rope 14 is between the pressure roller 9 and the driven roller 7 held and continue to the guide roller 10 led. This takes over the leadership of the rope 14 from or to the cable drum 22, of which only the lateral ones in FIG. 2 Are limitations. The carrier element 6 is attached to the frame 25 via the holder 17. The kink 18 of the Carrier element 6 enables the Rope sections, each between the rope entry 15 and the driven roller 7 or between the driven Roll 7 and the guide roller 10 are. The break point 18 of the carrier element 6 coincides with the axis the rope 14 is inserted into the device 1. By an appropriate choice of the length of the two sections of the Carrier element 6 (with the driven roller 7 and the pressure rollers 9 or the guide roller 10) can achieve a balance of the forces acting on the sections become. This is a largely load-free pivotability the winding device 1 achieved.

FIG. 3 shows the cable winch 21 with the one according to the invention Winding device 1. Both the cable drum 22 and the Winding device 1 are for better stability of the Cable winch 21 arranged within a frame 25. Also offers the frame some protection against mechanical External influences. The frame 25 is recorded 23 placed on a base 24. The substructure 24 can, for example be designed as a sledge or as a foundation. The cable winch 21 can be operated remotely.

Claims (10)

Winding device (1) for winding and unwinding a rope (14) of a winch (21), which device (1) has a guide roller (10) and one upstream of the driven rope drum (22), which is opposite the rope drum (22). or has a cable conveyor device (27) which can be driven in advance to apply tension to the cable (14) between the cable drum (22) and the cable conveyor device (27), the cable conveyor device (27) having at least two rollers (7, 9) guiding the cable (14), and wherein one of the rollers is driven, characterized in that the driven roller (7) and the guide roller (10) are arranged with respect to the incoming rope (14) so that the incoming rope (14) is approximately in a direction perpendicular to the Cable drum axis between the driven roller (7) and the guide roller (10) in the winding device (1), and that the incoming rope (14) first wraps around the driven roller (7) at about 270 °, then the guide ngsolle (10) loops at about 90 ° and is further fed to the cable drum (22). Winding device (1) according to claim 1, characterized in that the cable conveyor (27) and the guide roller (10) are arranged on a carrier element (6). Winding device (1) according to claim 2, characterized in that the carrier element (6) is arranged pivotably on the frame (25) of the cable winch (21). Winding device (1) according to one of claims 2 or 3, characterized in that the cable conveyor (27) is arranged on a section of the carrier element (6) and the guide member (10) on a second section of the carrier element (6), and that the sections are arranged at an angle to one another. Winding device (1) according to one of the preceding claims, characterized in that the rope (14) in the rope conveyor (27) is guided by more than one pressure roller (9) non-positively and frictionally on the driven roller (7). Winding device (1) according to one of the preceding claims, characterized in that the driven roller (7) can be driven hydrostatically. Winding device (1) according to one of the preceding claims, characterized in that a separate drive device (8, 26) is provided for the driven roller (7) and the cable drum (22). Winding device (1) according to one of Claims 2 to 7, characterized in that a sensor (11), in particular a sensing roller (11), is arranged on the carrier element (6). Winding device (1) according to one of claims 2 to 8, characterized in that the carrier element (6) is pivotably arranged on the frame (25) by the cable (14) subjected to tension between the cable conveying device (27) and the cable drum (22). Cable winch (21) with a winding device (1) after a of the preceding claims.

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