Cable pulling device with a bearing unit for an eccentric bearing of a pulling element

Abstract

The invention relates to a cable pulling device (10a; 10b) with a conveying unit (20a; 20b) for transporting at least one traction element (14a; 14b) intended for pulling cables into empty conduits, in particular fish tapes, with at least one traction element receiving unit (30a; 30b), in particular a traction element drum, which is provided for receiving the traction element (14a; 14b) and which has at least one storage unit (40a; 40b) for a wound storage of at least the traction element (14a; 14b). It is proposed that the bearing unit (30a; 30b) provides an eccentric bearing of the traction element (14a; 14b), in particular with respect to an axis of rotation (80a; 80b) of a bearing element (42a; 42b) of the bearing unit (40a; 40b).

Description

State of the art

[0001] Fish tape and / or cable pulling tools that operate manually according to the principle of a cable drum are already known. In these cases, the pulling device is usually mounted on a shaft. Disclosure of the invention

[0002] The invention is based on a cable pulling device with a conveyor unit for transporting at least one traction means, in particular fish tapes, provided at least for pulling cables into empty pipes, with at least one traction means receiving unit, in particular a traction means drum, which is provided for receiving the traction means and which has at least one bearing unit for a wound-up storage of at least the traction means.

[0003] It is proposed that the bearing unit provides an eccentric bearing of the traction means, in particular with respect to a rotation axis of a bearing element of the bearing unit.

[0004] The inventive design of the cable retraction device advantageously allows for the ergonomics of the cable retraction device, in particular of the traction means receiving unit, to be adapted, thereby advantageously optimizing the compactness of the cable retraction device. Furthermore, the center of gravity of the cable retraction device can be shifted, thus further optimizing ergonomics and / or handling. Furthermore, the functionality of the cable retraction device can advantageously be further enhanced, in particular with the eccentric bearing, which can lead to a thrust-like expulsion of the traction means. Furthermore, the performance of the cable retraction device can be increased, in particular during the insertion and / or expulsion of the traction means, preferably with a multi-shaft bearing.

[0005] The cable retraction device is designed in particular as a fishtape pulling system and / or as a cable pulling system. The cable retraction device is in particular intended at least to pull in pulling means, such as fishtapes or ropes or the like. In addition, the cable retraction device can also be provided for dispensing and / or pushing pulling means, such as fishtapes or ropes or the like. Fishtapes (also: electrician's snakes) are in particular also known as (cable) pull-in tapes and are preferably intended for laying new, e.g. electrical, lines, preferably cables, in walls or in cable ducts, in particular empty conduits. The pulling means, in particular the fishtape, the rope or the like, can have a round cross-section, an oval cross-section, a polygonal cross-section or a cross-section of a flat tape.In particular, the traction means can be made up of several parts, for example as a woven thread made up of individual strands or as a twisted strand. The cross-section of the traction means is preferably at least substantially constant along a longitudinal extent of the traction means. The traction means can also be made from different materials, for example at least partially from a plastic, such as nylon, at least partially from a metal, such as elastic spring steel, at least partially from a fiberglass tape, etc. The terms “intended” and / or “designed” should be understood in particular to mean specially programmed, designed and / or equipped. The fact that an object is intended and / or designed for a specific function should be understood in particular to mean that the object fulfills and / or executes this specific function in at least one application and / or operating state.

[0006] The conveyor unit can be provided for transporting the traction means in two mutually opposite transport directions. The conveyor unit is preferably motor-driven. The conveyor unit is in particular provided at least for pulling (in) the traction means. In addition, however, the conveyor unit can also be provided for pushing (dispensing) the traction means. In particular, the conveyor unit is based on a rotary drive. In particular, the cable retraction device has at least one drive unit for generating energy for operating the conveyor unit. Preferably, the drive unit is provided for generating a drive force which winds and / or unwinds the traction means in the traction means receiving unit, in particular the traction means drum. Preferably, the drive unit is an integral component of the cable retraction device, which is, for example, inseparably connected to the conveyor unit in a non-destructive manner.

[0007] Particularly preferably, the conveyor unit is designed to drive the traction means, in particular by driving the bearing shaft. In particular, a drive interface of the conveyor unit is rotationally fixed / rotationally fixed and directly connected to the bearing unit, in particular to at least one bearing shaft. Preferably, the conveyor unit is designed as a hub motor or the like for driving the bearing element of the bearing unit. Alternatively or additionally, the conveyor unit has a roller drive in the region of a traction means output.

[0008] In particular, the traction means receiving unit is provided for at least a largely enclosed storage of the traction means. This should be understood in particular that a large part of the components for storing the traction means, in particular at least the storage unit, is enclosed. Preferably, the traction means is at least largely enclosed, in particular enclosed, at least in a wound-up state of the traction means. Particularly preferably, the conveyor unit drives the traction means out of and / or in the traction means receiving unit during transport. Preferably, in the wound-up state of the traction means, at least 70%, preferably at least 90% of the traction means is enclosed, and particularly preferably the entire traction means is enclosed.In addition, "enclosing" is to be understood in particular as encompassing more than 50%, preferably more than 75%, and preferably more than 90% of the circumference of the traction means in the wound state in at least one circumferential direction, preferably in at least two circumferential directions extending in mutually perpendicular planes. In particular, the cable retraction device has a traction means output, at which the traction means is output to an area surrounding the cable retraction device. Preferably, the traction means receiving unit forms a traction means housing for the housing. In particular, the traction means housing forms a storage space for the wound-up traction means.

[0009] In particular, the traction means receiving unit at least partially forms a housing unit of the cable retraction device. Preferably, at least a large part of the conveyor unit is enclosed by the housing unit; in particular, the housing unit at least partially supports the conveyor unit. The term "the housing unit at least partially supports the conveyor unit" should be understood in particular to mean that at least 50%, preferably at least 75%, and preferably at least 90% of the total weight of the conveyor unit acts on the housing unit.

[0010] The bearing unit is preferably provided for winding up the traction means, in particular for supporting it during winding, wherein the traction means is in direct contact with at least part of the bearing unit, in particular with the bearing element of the bearing unit. In particular, the traction means is wound around the bearing element, in particular the bearing shaft, wherein preferably the bearing element, in particular the bearing shaft, drives the traction means out and / or in. In particular, the bearing element is an element which supports the traction means during storage and mounts it movably. In particular, the bearing element is at least one element with at least one sliding surface, which is preferably in direct contact with the traction means during storage, and / or the bearing shaft. Preferably, at least part of the bearing unit, preferably the bearing shaft, is mounted in a rotationally free manner. The axis of rotation of the bearing element is in particular the axis of rotation of the bearing shaft.An eccentric bearing of the traction mechanism means that the rotational axis of the bearing element, in particular the bearing shaft of the bearing unit, is offset or different from an extension axis of the wound traction mechanism, in particular the extension axis of a smallest possible cylinder around the wound traction mechanism. An extension axis is the central axis or extension axis of a smallest possible imaginary cylinder around the wound / supported traction mechanism around the bearing unit, in particular in the traction mechanism receiving unit, which in particular forms the normal to a base area of ​​the wound / supported cylinder formed by the cylinder.

[0011] It is further proposed that the bearing unit comprise at least two bearing elements, each of which is provided for supporting the same traction means. This advantageously allows the ergonomics of the cable retraction device, in particular of the traction means receiving unit, to be adapted, wherein the compactness of the cable retraction device is advantageously optimized. In this case, the shape of the traction means receiving unit, in particular of the traction means bearing housing, can advantageously be at least approximately cuboidal. In particular, the traction means in the traction means receiving unit is wound at least around the two bearing elements. Preferably, the traction means is wound eccentrically to the at least two bearing elements, wherein in particular an axis of extension of the bearing elements is offset or different from an axis of extension of the wound traction means, in particular the axis of extension of a smallest possible cylinder around the wound traction means.Preferably, the conveyor unit is provided for winding and / or unwinding the traction means around the bearing elements. Preferably, the bearing elements are designed separately from one another, in particular the axes of rotation of the bearing elements are separate from one another, in particular a distance between the bearing elements, in particular the axes of rotation, is at least twice, preferably at least three times, particularly preferably at least four times as great as a circumference of the bearing elements. Preferably, the bearing elements, in particular the axes of rotation of the bearing elements, are arranged at least substantially parallel to one another. Alternatively, the bearing elements, in particular the axes of rotation of the bearing elements, are skewed or angularly offset, in particular by at least 5°, preferably by at least 10°, advantageously by at least 20°, particularly preferably by at least 45°, and particularly advantageously by at least 90°.This can advantageously further increase flexibility in the design of the traction mechanism housing.

[0012] It is also proposed that at least one of the bearing elements forms a bearing shaft. This can advantageously ensure a drive for at least one of the bearing elements. In particular, at least one of the bearing elements is the, in particular rotation-free, bearing shaft. Preferably, all bearing elements are, in particular, rotation-free bearing shafts. In particular, at least one of the bearing elements, preferably one of the bearing elements designed as a bearing shaft, is connected to the conveyor unit. In particular, when the bearing element is designed as a bearing shaft, the axis of rotation of the bearing shaft is identical to an extension axis of the bearing element. Preferably, the conveyor unit is connected to the bearing shaft in a rotationally fixed / rotationally fixed manner, wherein the at least one further bearing element, in particular as a bearing shaft, is designed passively, in particular free-running.In particular, a drive interface of the conveyor unit is connected in a rotationally fixed / non-rotatable manner to at least the bearing shaft. In particular, the bearing shaft, which is connected in a rotationally fixed / non-rotatable manner to the conveyor unit, is to be understood as a drive shaft, which is preferably driven by a hub drive of the conveyor unit. Preferably, the further bearing element, in particular the further bearing shaft, rotates passively, preferably due to the transport aid. Alternatively, both bearing elements, in particular as a bearing shaft, are connected in a rotationally fixed / non-rotatable manner to the conveyor unit.

[0013] It is further proposed that the bearing unit comprise a transport aid which guides and / or drives the at least two bearing elements. This advantageously allows for optimised mounting of the traction means in the traction means receiving unit, in particular around the bearing unit. In particular, the transport aid is designed as a belt, a chain, a band, a rope and / or the like. Preferably, the transport aid rotates around the bearing elements of the bearing unit. Particularly preferably, the bearing elements are connected to the transport aid, in particular are wrapped around by the transport aid, preferably so that the bearing elements, in particular as bearing shafts, run synchronously. In particular, the transport aid is provided for connecting the bearing shaft, which is connected to the conveyor unit, preferably the drive shaft, to the further bearing element, in particular the further bearing shaft, preferably a free-running bearing shaft.Preferably, the traction means is wound around the transport aid in the traction means receiving unit. Particularly preferably, the bearing unit is designed as a belt transport unit or chain transport unit, in particular with at least two bearing elements that guide and / or drive the circulating transport aid, in particular as a belt or chain. Preferably, the axis of rotation of the mounted traction means in the traction means receiving unit is eccentric to the bearing elements of the bearing unit and at least approximately identical to a rotation axis of the transport aid. In at least one further embodiment of the cable retraction device according to the invention, the conveyor unit has a drive roller that engages in the transport aid to drive the transport aid and / or transmits force to the transport aid via friction. In particular, the drive roller is in direct contact with the transport aid.Preferably, the drive roller drives the bearing elements, in particular as bearing shafts, so that the traction means drives out and / or in.

[0014] Furthermore, it is proposed that the bearing unit, in particular the transport aid, have at least one coupling element for coupling to the traction means. This can advantageously ensure a transmission of force from the transport aid and the traction means. Preferably, the coupling element is arranged on the transport aid and / or on the bearing element. In particular, the coupling element is provided for a transmission of force from the transport aid, in particular at least one of the bearing elements, in particular the bearing shaft, to the traction means. In particular, the coupling element is provided for providing a clamping connection and / or positive connection with the traction means, wherein the coupling element is designed, for example, as a clamp, plug-in connector, screw terminal, lamp terminal, snap hook or the like. Preferably, the traction means has a coupling element corresponding to the coupling element of the bearing unit.Particularly preferably, the coupling element is designed as a coupling pin, which is provided in particular for the preferably rotation-free coupling into a recess of the coupling element of the traction device. In a configuration of the transport aid as a chain, for example, the coupling element is a chain link provided for fastening the traction device. In at least one further configuration, the transport aid, in particular as a belt, has a roughness that accommodates the traction device or the coupling element of the traction device, which has advantageous properties for coupling to a rough surface.

[0015] It is conceivable that the coupling element provides a detachable coupling of the traction device. "Detachable" should be understood, in particular, as "non-destructively separable." In particular, the coupling element can be detachably coupled with a tool, in particular with a hex wrench, screwdriver, and / or a tool specifically developed for the coupling unit, and / or manually, in particular non-destructively separable. Particularly preferably, the coupling element is designed for coupling with a plurality of, in particular different, traction devices.

[0016] Furthermore, at least three bearing elements or four bearing elements are also conceivable, which are designed accordingly, wherein the traction means, in particular the transport aid, is wound around the bearing elements.

[0017] It is further proposed that the bearing unit comprise at least one bearing element, in particular designed as a bearing shaft, which is mounted eccentrically so as to be rotatable. This advantageously provides for a thrust-like expulsion of the traction means. In particular, the eccentrically mounted bearing element, in particular with the conveyor unit, is provided to generate an additional movement which overrides and / or interrupts the pure continuous retraction and / or the pure continuous dispensing. In particular, the movement which deviates from the pure retraction and pure dispensing is provided to free a traction element which is tilted, hooked or blocked, for example in a shaft tube, and / or to prevent tilting, hooking or blocking of the traction element from the outset, if possible. In particular, in the eccentrically mounted bearing element, the axis of rotation is different from an axis of symmetry, in particular the axis of extension, of the bearing element.

[0018] Furthermore, it is proposed that the traction mechanism receiving unit comprise at least the traction mechanism housing, which is intended to at least largely enclose the bearing unit, in particular the mounted traction mechanism. This advantageously allows for the traction mechanism to be encapsulated, in particular from the environment, which advantageously prevents contamination of the bearing unit, in particular of the bearing elements, particularly during use and / or storage of the cable retraction device. In particular, the traction mechanism receiving unit, in particular the traction mechanism housing, is configured to be at least approximately polyhedral or rotationally asymmetrical.

[0019] Furthermore, it is proposed that the traction means receiving unit, in particular the traction means housing, be designed to be separable from the conveyor unit. This advantageously makes it as easy as possible to change the traction means. Furthermore, the conveyor unit can be mounted as simply as possible, in particular due to a polyhedral design of the traction means housing, in particular several traction means housings can be accommodated in one traction means housing mounting. In particular, the traction means receiving unit is designed to be exchangeable. Preferably, the traction means receiving unit is detachably connected to the housing unit. In particular, the traction means receiving unit is designed to be separable from the conveyor unit, in particular the drive unit.Preferably, the conveyor unit, preferably in the housing unit, has a conveyor interface which is provided for power transmission from the drive unit to the traction means receiving unit, in particular to a corresponding conveyor interface of the traction means receiving unit.

[0020] It is further proposed that the bearing unit be formed at least partially in one piece with the conveyor unit. This advantageously makes it possible to provide a direct drive for the bearing unit. The fact that two units are formed “partially in one piece” should be understood in particular to mean that the units have at least one, in particular at least two, advantageously at least three common elements which are a component, in particular a functionally important component, of both units. In particular, the conveyor unit comprises the bearing elements and the belt in the belt transport unit, which move the traction means. Preferably, the bearing elements are either directly connected to a drive element of the conveyor unit or are axially freely mounted. In particular, the traction means receiving unit is fixedly connected to the housing unit, in particular to the conveyor unit, wherein a release of the traction means receiving unit is preferably prevented.

[0021] Furthermore, a traction mechanism receiving unit of a cable retraction device is proposed. The inventive design of the traction mechanism receiving unit advantageously allows the ergonomics of the traction mechanism receiving unit to be adapted, whereby the compactness of the traction mechanism receiving unit is advantageously optimized. In addition, the traction mechanism receiving unit can be used to shift a center of gravity of the cable retraction device, thus further optimizing ergonomics and / or handling. Furthermore, the functionality of the cable retraction device can advantageously be further increased, in particular with the eccentric mounting of the traction mechanism receiving unit, which can lead to a thrust-like expulsion of the traction mechanism. In particular, the traction mechanism receiving unit has a coupling unit which is intended to be coupled, in particular detachably, to the housing unit of the cable retraction device.This allows the traction device receiving unit to be advantageously coupled with different drive units with different power of different cable retraction devices.

[0022] Furthermore, a system comprising the cable retraction device and at least the traction means is proposed. The system according to the invention advantageously allows the ergonomics of the cable retraction device, in particular of the traction means receiving unit, to be adapted, advantageously optimizing the compactness of the cable retraction device. In addition, a center of gravity of the cable retraction device can be shifted, thus further optimizing ergonomics and / or handling. Furthermore, the functionality of the cable retraction device can advantageously be further increased, in particular with the eccentric bearing, which can lead to a thrust-like expulsion of the traction means. In particular, the traction means has a coupling element which is provided for coupling to the coupling element of the bearing unit.

[0023] The cable retraction device according to the invention, the traction means receiving unit according to the invention, and the system according to the invention are not intended to be limited to the application and embodiment described above. In particular, the cable retraction device according to the invention, the traction means receiving unit according to the invention, and the system according to the invention may have a number of individual elements, components, and units that differs from the number stated herein to fulfill a functionality described herein. Furthermore, in the value ranges specified in this disclosure, values ​​within the stated limits are also to be considered disclosed and can be used arbitrarily. drawing

[0024] Further advantages will become apparent from the following description of the drawings. The drawings illustrate two exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0025] They show: Fig. 1 A system with a cable retraction device and with a traction device, Fig. 2 the cable retraction device with a dismantled traction device receiving unit, Fig. 3 a storage unit of the cable retraction device and Fig. 4 an alternative embodiment of a bearing unit of the cable retraction device. Description of the embodiments

[0026] The Fig. 1 shows a schematic perspective view of a system 12a with a cable retraction device 10a. The system 12a has the cable retraction device 10a. The system 12a, in particular the cable retraction device 10a, has a traction means 14a. The traction means 14a is provided at least for pulling cables, in particular electrical lines, into empty conduits. The traction means 14a is provided for transmitting a tensile force of the system 12a to the cable. The traction means 14a has a traction means head 24a. The traction means 14a has a traction means cable 28a. The traction means head 24a is provided for reversibly fastening the cable to the traction means, for pulling the cable into empty conduits. The traction means, in particular the traction means cable, is designed, for example, as a stranded wire made of spring steel. However, other designs of the traction means 14a are also conceivable.

[0027] The cable retraction device 10a has a housing unit 18a. The cable retraction device 10a has a traction mechanism receiving unit 30a. The traction mechanism receiving unit 30a is provided for supporting the traction mechanism 14a. The traction mechanism receiving unit 30a is provided for at least largely enclosed storage of the traction mechanism 14a. The traction mechanism receiving unit 30a comprises a traction mechanism housing 32a, which at least largely encloses the traction mechanism 14a in the rolled-up state. The traction mechanism housing 32a forms a storage space for the rolled-up traction mechanism 14a. The traction mechanism receiving unit 30a is designed as a traction mechanism drum. The traction mechanism receiving unit 30a is provided for supporting the traction mechanism 14a. The traction mechanism receiving unit 30a is at least approximately polyhedral or rotationally asymmetrical. The traction means housing 32a is at least approximately polyhedral or rotationally asymmetrical (cf.also . Fig. 2).

[0028] The traction mechanism receiving unit 30a has a traction mechanism output 26a. The traction mechanism 14a exits the traction mechanism receiving unit 30a at the traction mechanism output 26a. The traction mechanism output 26a is arranged on an outer circumference on a lateral surface of the traction mechanism receiving unit 30a. The housing unit 18a has a traction mechanism output 70a. The traction mechanism 14a exits the housing unit 18a at the traction mechanism output 70a. The traction mechanism output 70a is arranged on an outer circumference on a lateral surface of the housing unit 18a.

[0029] The cable pulling device 10a has a conveyor unit 20a. The housing unit 18a partially houses the conveyor unit 20a. The housing unit 18a supports the conveyor unit 20a. The conveyor unit 20a is arranged on an outer circumference on a lateral surface of the cylindrical traction means receiving unit 30a. The conveyor unit 20a is provided for transporting the traction means 14a along at least one transport direction, in particular along at least two transport directions. The conveyor unit 20a is provided for transporting the traction means 14a along a pull-in direction and / or along an output direction. The conveyor unit 20a is provided for pulling the traction means 14a during a cable pulling process. The conveyor unit 20a is provided for pushing the traction means 14a during an insertion process in which the traction means 14a is threaded and inserted into the empty conduit.The conveyor unit 20a is provided to drive the traction means 14a out of the traction means receiving unit 30a and / or in during transport.

[0030] The conveyor unit 20a is configured to wind and / or unwind the traction means 14a in the traction means receiving unit 30a. The conveyor unit 20a comprises at least one drive unit 22a. The drive unit 22a is provided to generate a drive force that winds and / or unwinds the traction means 14a in the traction means receiving unit 30a. The drive unit 22a is an integral component of the cable retraction device 10a, which is, for example, non-destructively and inseparably connected to the traction means receiving unit 30a and the conveyor elements of the conveyor unit 20a of the traction means 14a. The conveyor unit 20a at least partially forms the traction means receiving unit 30a. In an alternative embodiment of the cable retraction device 10a, the housing unit 18a has at least one housing interface. An external drive unit 22a can be coupled to the cable retraction device 10a via the housing interface.The external drive unit 22a is, for example, a hand-held power tool.

[0031] The Fig. Figure 2 shows the cable retraction device 10a with the disassembled traction mechanism receiving unit 30a. The traction mechanism receiving unit 30a is detachably connected to the housing unit 18a. The traction mechanism receiving unit 30a is designed to be separable from the conveyor unit 20a. The traction mechanism housing 32a is designed to be separable from the conveyor unit 20a. The traction mechanism receiving unit 30a is designed to be replaceable. The traction mechanism receiving unit 30a has a coupling unit. The coupling unit is designed to form a detachable coupling with the housing unit 18a of the cable retraction device 10a.

[0032] The traction mechanism receiving unit 30a is designed to be separable from the conveyor unit 20a, in particular the drive unit 22a. The conveyor unit 20a has a conveyor interface. The conveyor interface is arranged on the housing unit 18a. The conveyor interface is provided for transmitting power from the drive unit 22a to the traction mechanism receiving unit 30a. The traction mechanism receiving unit 30a has a conveyor interface corresponding to the conveyor interface. The corresponding conveyor interface is provided for absorbing power from the conveyor unit 20a.

[0033] During the coupling process, the coupling unit is designed to receive the traction mechanism receiving unit 30a. After the traction mechanism receiving unit 30a has been coupled to the housing unit 18a, the traction mechanism 14a is guided through the traction mechanism output 26a of the traction mechanism receiving unit 30a and through the traction mechanism output 70a of the housing unit 18a.

[0034] The Fig. Figure 3 shows a schematic representation of a bearing unit 40a of the cable retraction device 10a. The cable retraction device 10a has the bearing unit 40a. The bearing unit 40a is provided for the wound-up mounting of at least the traction device 14a. The traction device housing 32a encloses at least a large portion of the bearing unit 40a. The bearing unit 40a is provided for the winding-up of the traction device 14a. The bearing unit 40a provides eccentric mounting of the traction device 14a.

[0035] The bearing unit 40a is provided to support the traction means 14a during winding. The traction means 14a is provided in direct contact with at least a portion of the bearing unit 40a. The bearing unit 40a has a bearing element 42a. The traction means 14a is in direct contact with the bearing element 42a of the bearing unit 40a. The bearing unit 40a provides an eccentric mounting of the traction means 14a relative to a rotational axis 80a of the bearing element 42a of the bearing unit 40a. The rotational axis 80a of the bearing element 42a is offset or different from an extension axis 86a of the wound or mounted traction means 14a. The extension axis 86a of the wound or mounted traction means 14a is the extension axis 86a of a smallest possible cylinder around the wound traction means 14a.

[0036] The bearing unit 40a has at least two bearing elements 42a, 44a, each of which is provided for supporting the same traction means 14a. The traction means 14a in the traction means receiving unit 30a is wound at least around the two bearing elements 42a, 44a. The traction means 14a is wound eccentrically to the at least two bearing elements 42a, 44a. A rotation axis 80a, 82a of the bearing elements 42a, 44a is offset or different from the extension axis 86a of the wound traction means 14a. The conveyor unit 20a is provided for winding and / or unwinding the traction means 14a around the bearing elements 42a, 44a. The bearing elements 42a, 44a are formed separately from one another. The rotation axes 80a, 82a of the bearing elements 42a, 44a are separate from one another. The bearing elements 42a, 44a are arranged at least substantially parallel to one another. The rotation axes 80a, 82a of the bearing elements 42a, 44a are arranged at least substantially parallel to one another.In an alternative embodiment of the cable retraction device 10a according to the invention, the bearing elements 42a, 44a are skewed or angularly offset. The rotation axes 80a, 82a of the bearing elements 42a, 44a are skewed or angularly offset.

[0037] At least one of the bearing elements 42a, 44a is designed as a bearing shaft 48a, 50a. The bearing shaft 48a, 50a is designed to be rotationally free. The rotation axis 80a, 82a of the bearing element 42a, 44a is in particular the rotation axis 80a, 82a of the bearing shaft 48a, 50a. The bearing elements 42a, 44a are designed as bearing shafts 48a, 50a. At least one of the bearing elements 42a, 44a designed as a bearing shaft 48a, 50a is connected to the conveyor unit 20a. When the bearing element 42a, 44a is designed as a bearing shaft 48a, 50a, the rotation axis 80a, 82a of the bearing shaft 48a, 50a is identical to an extension axis of the bearing element 42a, 44a. The conveyor unit 20a is connected to the bearing shaft 48a, 50a in a rotationally fixed / rotatably fixed manner, wherein the at least one further bearing element 42a, 44a is designed, in particular as a bearing shaft 48a, 50a, passively, in particular freely running.A drive interface of the conveyor unit 20a is rotationally fixed / non-rotatably connected to at least the bearing shaft 48a, 50a. The bearing shaft 48a, 50a, which is rotationally fixed / non-rotatably connected to the conveyor unit 20a, is to be understood as a drive shaft. Alternatively, both bearing elements 42a, 44a are rotationally fixed / non-rotatably connected to the conveyor unit 20a as bearing shafts 48a, 50a.

[0038] Alternatively, the bearing unit 40a comprises at least one bearing element 42a, 44a having a sliding surface. The sliding surface is in direct contact with the traction element 14a during the bearing arrangement. The sliding surface enables the traction element 14a to slide around the bearing element 42a, 44a.

[0039] The bearing element 42a, 44a drives the traction means 14a out and / or in. The bearing element 42a, 44a is an element that supports the traction means 14a during storage and movably mounts it. The conveyor unit 20a is configured to wind and / or unwind the traction means 14a onto the bearing element 42a, 44a. The conveyor unit 20a is configured to wind and / or unwind the traction means 14a onto the bearing shaft 48a, 50a. The conveyor unit 20a is at least partially designed as a hub motor, which sets the movably mounted bearing shaft 48a, 50a in rotation.

[0040] The bearing unit 40a has a transport aid 54a, which guides and / or drives the at least two bearing elements 42a, 44a. The traction means 14a is wound around the transport aid 54a in the traction means receiving unit 30a. The further bearing shaft 48a, 50a rotates passively due to the transport aid 54a. The transport aid 54a rotates around the bearing elements 42a, 44a of the bearing unit 40a. The bearing elements 42a, 44a are connected to the transport aid 54a. The bearing elements 42a, 44a are wrapped by the transport aid 54a. The bearing elements 42a, 44a, designed as bearing shafts 48a, 50a, run at least approximately synchronously due to the transport aid 54a. The transport aid 54a is provided to connect the bearing shaft 48a, 50a, which is connected to the conveyor unit 20a, to the further bearing element 42a, 44a.The transport aid 54a is provided for connecting the drive shaft to the free-running bearing shaft 48a, 50a. The extension axis 86a of the mounted traction mechanism 14a in the traction mechanism receiving unit 30a is eccentric to the bearing elements 42a, 44a of the bearing unit 40a and at least approximately identical to a rotation axis 90a of the transport aid 54a.

[0041] The transport aid 54a is designed as a belt. The bearing unit 40a is designed as a belt transport unit. The belt transport unit has at least two bearing elements 42a, 44a that guide and / or drive the circulating belt. Alternatively, the transport aid 54a is designed as a chain. The bearing unit 40a is designed as a chain transport unit. The chain transport unit has at least two bearing elements 42a, 44a that guide and / or drive the circulating chain.

[0042] In at least one further embodiment of the cable retraction device 10a according to the invention, the conveyor unit 20a has a drive roller. The drive roller engages with the transport aid 54a to drive the transport aid 54a. Alternatively, the drive roller transmits a drive force to the transport aid 54a via friction. The drive roller is in direct contact with the transport aid 54a. The drive roller is provided to drive the bearing elements 42a, 44a as free-running bearing shafts 48a, 50a, so that the traction means 14a drives out and / or in.

[0043] The bearing unit 40a has at least one coupling element 56a for coupling to the traction means 14a. The transport aid 54a has the coupling element 56a for coupling to the traction means 14a. The coupling element 56a is arranged on the transport aid 54a. The coupling element 56a is provided for transmitting force from the transport aid 54a to the traction means 14a. The coupling element 56a is provided for transmitting force from one of the bearing elements to the traction means 14a. The coupling element 56a is provided for providing a clamping connection and / or positive connection with the traction means 14a. The coupling element 56a is designed, for example, as a clamp, plug-in connector, screw terminal, lamp terminal, snap hook, or the like. The traction means 14a has a coupling element 58a corresponding to the coupling element 56a of the bearing unit 40a.

[0044] In at least one further embodiment of the device according to the invention, the bearing unit 40a is at least partially formed integrally with the conveyor unit 20a. The traction mechanism receiving unit 30a is fixedly connected to the conveyor unit 20a. The bearing elements 42a, 44a are directly connected to a drive element of the conveyor unit 20a. The traction mechanism receiving unit 30a is fixedly connected to the housing unit 18a. Detachment of the traction mechanism receiving unit 30a from the housing unit 18a is prevented.

[0045] In the Fig. 4 shows a further embodiment of the invention. The following descriptions and the drawings are essentially limited to the differences between the embodiments, whereby with regard to components with the same designation, in particular with regard to components with the same reference numerals, reference is also made to the drawings and / or the description of the other embodiments, in particular to the Fig. 1 to 3. To distinguish the embodiments, the letter a is added to the reference numerals of the embodiment in the Fig. 1 to 3. In the examples of the Fig. 3, the letter a is replaced by the letter b.

[0046] The Fig.4 shows an alternative embodiment of a bearing unit 40b of a cable retraction device 10b. The bearing unit 40b has at least one bearing element 46b. The bearing element 46b is mounted eccentrically for rotation. A traction means 14b is wound around the eccentrically mounted bearing element 46b. The bearing element 46b is provided for eccentrically mounting the traction means 14b. A rotation axis 84b of the bearing element 46b is different from or offset from an extension axis 86b of a wound or mounted traction means 14b. In the eccentrically mounted bearing element 46b, the rotation axis 84b is different from an axis of symmetry 88b of the bearing element 46b. The bearing element 46b is designed as a bearing shaft 52b. The bearing shaft 52b is mounted eccentrically.

[0047] The eccentrically mounted bearing element 46b is intended to generate an additional movement that overrides and / or interrupts the pure continuous retraction and / or the pure continuous dispensing. The eccentrically mounted bearing element 46b, together with the conveyor unit 20b, is intended to generate an additional movement that overrides and / or interrupts the pure continuous retraction and / or the pure continuous dispensing. The movement that deviates from the pure retraction and pure dispensing is intended to free a tension element that is tilted, hooked, or blocked, for example, in a shaft tube, and / or to prevent tilting, hooking, or blocking of the tension element from the outset, if possible.

[0048] A coupling element 56b is arranged on the eccentrically mounted bearing element 46b. The coupling element 56b is intended for coupling to a corresponding coupling element 58b of the traction means 14b.

Claims

[1] Cable pulling device (10a; 10b) with a conveyor unit (20a; 20b) for transporting at least one traction means (14a; 14b), in particular fish tapes, provided at least for pulling cables into empty conduits, with at least one traction means receiving unit (30a; 30b), in particular a traction means drum, which is provided for receiving the traction means (14a; 14b) and which has at least one bearing unit (40a; 40b) for a wound-up storage of at least the traction means (14a; 14b), characterized by that the bearing unit (30a; 30b) provides an eccentric bearing of the traction means (14a; 14b), in particular to a rotation axis (80a; 80b) of a bearing element (42a; 42b) of the bearing unit (40a; 40b). [2] Cable retraction device (10a) according to claim 1, characterized by that the bearing unit (30a) has at least two bearing elements (42a, 44a), each of which is provided for supporting the same traction means (14a). [3] Cable retraction device (10a) according to claim 2, characterized by that at least one of the bearing elements (42a, 44a) forms a bearing shaft (48a, 50a). [4] Cable retraction device (10a) according to one of the preceding claims, characterized by that the bearing unit (30a) has a transport aid (54a) which guides and / or drives the at least two bearing elements (42a, 44a). [5] Cable retraction device (10a; 10b) according to one of the preceding claims, characterized by that the storage unit (30a; 30b), in particular the transport aid (54a), has at least one coupling element (56a; 56b) for coupling to the traction means (14a; 14b). [6] Cable retraction device (10b) according to one of the preceding claims, characterized by that the bearing unit (30b) has at least one bearing element (44b), in particular designed as a bearing shaft (52b), which is mounted so as to be eccentrically rotatable. [7] Cable retraction device (10a; 10b) according to one of the preceding claims, characterized by that the traction means receiving unit (30a; 30b) has at least one traction means housing (32a; 32b) which is intended to at least largely enclose the bearing unit (30a; 30b), in particular the stored traction means (14a; 14b). [8] Cable retraction device (10a; 10b) according to one of the preceding claims, characterized by that the traction means receiving unit (30a; 30b), in particular the traction means housing (32a; 32b), is designed to be separable from the conveyor unit (20a; 20b). [9] Cable retraction device (10a; 10b) according to one of claims 1 to 7, characterized by that the bearing unit (30a; 30b) is at least partially formed in one piece with the conveyor unit (20a; 20b). [10] Traction means receiving unit (30a; 30b) of a cable retraction device (10a; 10b) according to one of the preceding claims. [11] System (12a; 12b) with a cable retraction device (10a; 10b) according to one of claims 1 to 9 and with at least one pulling means (14a; 14a).

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