Cable retraction device

Abstract

The invention is based on a cable pulling device (10a - 10c) with a first traction means bearing unit (12a - 12c) for supporting a first traction means (14a - 14c) provided for pulling cables into empty conduits. It is proposed that the cable pulling device (10a - 10c) has at least one further traction means bearing unit (16a - 16c) for supporting at least one further traction means (18a - 18c) provided for pulling cables into empty conduits.

Description

State of the art

[0001] A cable pulling device with a first traction means bearing unit for supporting a first traction means intended for pulling cables into empty conduits has already been proposed. Disclosure of the invention

[0002] The invention is based on a cable pulling device with a first traction means bearing unit for supporting a first traction means provided for pulling cables into empty conduits.

[0003] It is proposed that the cable pulling device has at least one further traction means bearing unit for supporting at least one further traction means provided for pulling cables into empty conduits.

[0004] The inventive design of the cable retraction device allows for particularly high flexibility of use. Several, advantageously different, traction means can be provided by the cable retraction device. Particularly high work efficiency can be achieved.

[0005] The cable pulling device is designed in particular as a fish tape pulling system and / or as a cable pulling system. The cable pulling device is in particular intended at least to pull in fish tapes, strands or ropes or the like. In addition, the cable pulling device can also be provided for dispensing and / or pushing fish tapes, strands or ropes (e.g. stranded ropes) or the like. Fish tapes (also: electrician's snakes) are in particular also known as (cable) pulling tapes and are preferably intended for laying new, e.g. electrical, lines, preferably cables, in walls or in cable ducts. The first pulling means and / or the at least one further pulling means, in particular the fish tape, 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 strip.The first traction means and / or the at least one further traction means can be designed, for example, as a polymer, in particular a twisted polymer, as a steel band, as a steel spiral, as a glass fiber tape or the like. Preferably, the cross section of the first traction means is at least substantially constant along a longitudinal extent of the first traction means. Preferably, the cross section of the at least one further traction means is at least substantially constant along a longitudinal extent of the at least one further traction means. In particular, the traction means and / or the at least one further traction means can be designed in several parts, for example as a woven thread made up of individual strands or as a twisted strand or as a stranded rope. The first traction means and / or the at least one further traction means can also be designed from different materials, for example at least partially from a plastic, such asa nylon, at least partly made of a metal, such as elastic spring steel, at least partly made of fiberglass, etc.

[0006] The following description of the first traction mechanism bearing unit preferably also applies, in particular with the exception of the differences described, to the at least one further traction mechanism bearing unit. The first traction mechanism bearing unit preferably has a base body. The base body preferably encloses the first traction mechanism, preferably in the rolled-up state, at least to a large extent. The fact that an object encloses another object at least to a large extent should be understood in particular to mean that the object encloses at least 50%, preferably at least 75%, more preferably at least 95% of a total volume and / or a total mass of the other object. The first traction mechanism bearing unit preferably has a traction mechanism drum. The base body preferably forms a bearing space for a rotationally movable bearing element of the cable retraction device, in particular of the first traction mechanism bearing unit, such as a bearing cage / the traction mechanism drum.The traction mechanism drum is in particular arranged in the base body so as to be (rotationally) movable. The traction mechanism drum is preferably provided for winding and unwinding the first traction mechanism. The traction mechanism drum in particular has a winding axis around which the first traction mechanism can preferably be wound and / or unwound. The winding axis is in particular identical to a bearing axis of the first traction mechanism bearing unit. The terms “provided” and / or “configured” should be understood in particular to mean specially programmed, designed and / or equipped. The fact that an object is provided and / or configured for a specific function should be understood in particular to mean that the object fulfills and / or performs this specific function in at least one application and / or operating state.

[0007] It is conceivable for the first traction means fastening unit and the at least one further traction means fastening unit to have an identical size, in particular with regard to a maximum diameter of the respective base body and / or a maximum height of the respective base body. The respective maximum diameter is preferably measured in a plane running perpendicular to the respective bearing axis. The respective maximum height is preferably measured parallel to the respective bearing axis. Alternatively, however, it is also conceivable for the first traction means fastening unit to be smaller or larger than the at least one further traction means fastening unit, in particular with regard to the maximum diameter and / or the maximum height.

[0008] The cable retraction device preferably has a base housing unit. The first traction mechanism bearing unit and / or the further traction mechanism bearing unit are preferably fastened to the base housing unit. It is also conceivable for the base housing unit to be at least partially formed integrally with the first traction mechanism bearing unit and / or the at least one further traction mechanism bearing unit. The phrase "at least one unit and at least one further unit are at least partially formed integrally with one another" should be understood in particular to mean that at least one element of the unit is formed integrally with at least one further element of the further unit.“In one piece” can be understood as at least materially connected, for example by a welding process, a soldering process, an adhesive process, an injection molding process and / or another process that appears appropriate to the person skilled in the art, and / or advantageously formed in one piece, such as by production from a casting and / or by production in a single or multi-component injection molding process and advantageously from a single blank.

[0009] It is further proposed that the cable retraction device have at least one drive unit by which the first traction mechanism bearing unit can be driven separately from the at least one further traction mechanism bearing unit. Advantageously, the traction mechanism fastening device can be used particularly flexibly. A particularly high level of user comfort can be achieved. The cable retraction device is preferably designed as a battery-operated cable retraction device, which in particular has an energy storage interface, preferably a battery pack interface, for connection to an energy storage device, preferably a battery pack. It is conceivable that the energy storage device is part of the cable retraction device.

[0010] It is further proposed that the cable retraction device have at least one drive unit, in particular the one already mentioned above, with at least one motor, by means of which the first and the at least one further traction mechanism bearing unit can be driven. Advantageously, one motor is sufficient to drive the first traction mechanism bearing unit and the at least one further traction mechanism bearing unit. A particularly cost-effective drive for the cable retraction device can be provided. It is conceivable that the first traction mechanism bearing unit and the at least one further traction mechanism bearing unit can be driven jointly by the drive unit, in particular the at least one motor. Alternatively or additionally, it is conceivable that either the first traction mechanism bearing unit or the further traction mechanism bearing unit can be driven by the drive unit, in particular the motor.For example, the cable retraction device has a coupling unit via which the first traction mechanism bearing unit and / or the at least one further traction mechanism bearing unit can preferably be connected to the drive unit to form a drive. The drive unit, preferably the motor, is provided in particular to drive the bearing axis of the first traction mechanism bearing unit and / or the further traction mechanism bearing unit, preferably about the respective winding axis. The motor is preferably designed as an electric motor. The coupling unit is preferably designed as a mechanical coupling, for example with a coupling lever, in particular a pair of pliers, and a coupling element that can be moved by means of the pliers to create a positive connection between a drive shaft and an output shaft.

[0011] It is also proposed that the cable retraction device have at least one drive unit, in particular the one already mentioned, which has a motor, in particular the one already mentioned, for driving the first traction mechanism bearing unit and a further motor for driving the at least one further traction mechanism bearing unit. Advantageously, a particularly high degree of flexibility can be achieved. In the event of a failure of one or more of the further motors, the cable retraction device can continue to be used by using the other motor. Advantageously, a loss of work can be counteracted particularly effectively.

[0012] It is further proposed that the first traction means and the at least one further traction means differ in at least one traction means characteristic. Advantageously, a particularly high degree of flexibility of use can be achieved. A particularly high degree of user comfort can be realized. The traction means characteristic can be, for example, a maximum diameter, a maximum length, a material, a shape, or the like.

[0013] It is further proposed that the first and at least one additional traction means have different lengths. This advantageously allows for particularly high levels of flexibility in use. This allows for particularly high levels of user comfort.

[0014] It is also proposed that the first and the at least one further traction means can be coupled. By coupling the first traction means and the at least one further traction means, particularly great distances can advantageously be bridged. Advantageously, particularly high flexibility of use can be achieved. Particularly high user comfort can be realized. Preferably, the first traction means and / or the at least one further traction means are / are removable from the respective traction means bearing unit. For example, a free end of the first traction means and a free end of the at least one further traction means can be coupled, preferably fastened to one another, preferably detachably fastened. In this context, “detachable” should be understood in particular to mean “non-destructively separable”.

[0015] It is further proposed that the cable retraction device have a base housing unit which has at least one fastening interface for detachably fastening the first and / or the at least one further traction mechanism bearing unit. Advantageously, the traction mechanism bearing units can be replaced particularly easily and / or cost-effectively, for example in the event of damage. The traction mechanism bearing units can be detached from the base housing unit for maintenance and / or repair. Advantageously, a particularly high level of maintenance convenience can be achieved. If one of the traction mechanism bearing units is not required for a job to be carried out, it can be detached from the base housing unit, in particular in order to reduce the weight of the cable retraction device when carrying out the work. A particularly high level of user convenience can be achieved.The fastening interface preferably has at least one locking element, for example a locking lug and / or a locking recess, a clamping element, a screw element, or the like, for fastening the first traction mechanism bearing unit and / or the further traction mechanism bearing unit. The first traction mechanism bearing unit and / or the at least one further traction mechanism bearing unit preferably have / have a mounting interface corresponding to the fastening interface. Preferably, the first traction mechanism bearing unit and / or the at least one further traction mechanism bearing unit can be detached from the base housing unit, in particular the fastening interface, without the use of tools.

[0016] Furthermore, it is proposed that the cable retraction device have at least one detection unit configured to detect a characteristic variable, in particular a presence, of the first traction mechanism bearing unit, the at least one further traction mechanism bearing unit, the first traction mechanism, and / or the at least one further traction mechanism. Advantageously, particularly safe and / or proper operation of the cable retraction device can be realized. A particularly high level of user comfort can be achieved.It is conceivable that the detection unit is mechanically designed, for example having at least one button or the like which can be actuated by mounting the first traction mechanism bearing unit and / or the at least one further traction mechanism bearing unit, that the detection unit has a sensor system for detecting the characteristic variable and / or that the detection unit has a selection element, for example a selector switch, for inputting the characteristic variable, which can be operated in particular by an operator. The sensor system can, for example, have an optical sensor, a mechanical sensor, an electrical sensor or another sensor that appears appropriate to a person skilled in the art. The characteristic variable preferably corresponds to the presence of the first traction mechanism bearing unit and / or the further traction mechanism bearing unit on the base housing unit.Alternatively, it is also conceivable that the characteristic corresponds to the presence of the first traction means in the first traction means bearing unit and / or of the at least one further traction means in the at least one further traction means bearing unit. Alternatively, it is also conceivable that the characteristic is a traction means bearing unit characteristic, which is, for example, a size, in particular a maximum height and / or a maximum diameter, a weight or the like, of the first traction means bearing unit and / or of the at least one further traction means bearing unit. Furthermore, it is alternatively conceivable that the characteristic is the traction means characteristic. It is also conceivable that the detection unit is configured to detect a plurality of characteristics relating to the first traction means bearing unit, the further traction means bearing unit, the first traction means and / or the further traction means.The cable retraction device preferably has a control unit, which is provided for controlling the drive unit. The control unit is preferably arranged at least partially on, in particular in, the base housing unit. It is conceivable that the detection unit is at least partially formed by the control unit. The control unit comprises, in particular, at least one processor and one memory element, as well as an operating program stored on the memory element. The memory element is preferably designed as a digital storage medium, for example, as a hard disk or the like.

[0017] It is also proposed that the at least one detection unit determines a control parameter for a drive unit, in particular the one already mentioned, at least as a function of the characteristic variable. Advantageously, particularly proper and / or efficient operation of the cable retraction device can be realized. The control parameter is, for example, a drive speed, a drive enable, a drive blockage, a tensile force, or the like. The control unit is particularly designed to take at least the control parameter into account when controlling the drive unit.

[0018] It is also proposed that the first and the at least one further traction mechanism bearing unit be arranged at a distance from one another. Advantageously, particularly high accessibility of the first traction mechanism bearing unit and the further traction mechanism bearing unit can be achieved. A particularly high level of user comfort can be realized. Preferably, the first traction mechanism bearing unit and the at least one further traction mechanism bearing unit are arranged on opposite sides of the base housing unit. Preferably, the bearing axis of the first traction mechanism bearing unit runs at least substantially parallel to the bearing axis of the further traction mechanism bearing unit. “Substantially parallel” can be understood here as an alignment of a direction relative to a reference direction, in particular in a plane, wherein the direction has a deviation from the reference direction of in particular less than 8°, advantageously less than 5° and particularly advantageously less than 2°.Alternatively, it is conceivable that the bearing axis of the first traction mechanism bearing unit runs transversely, in particular different from parallel, for example at least substantially perpendicular, to the bearing axis of the further traction mechanism bearing unit. "Substantially perpendicular" can be understood as an alignment of a direction relative to a reference direction, wherein the direction and the reference direction, in particular viewed in a projection plane, enclose an angle of 90° and the angle has a maximum deviation of in particular less than 8°, advantageously less than 5°, and particularly advantageously less than 2°.

[0019] Furthermore, it is proposed, in particular in one exemplary embodiment, that the first traction mechanism bearing unit has a receptacle for the at least one further traction mechanism bearing unit. Advantageously, a particularly compact cable retraction device can be provided. Preferably, the first traction mechanism bearing unit and the further traction mechanism bearing unit are arranged coaxially when mounted on the base housing unit. The further traction mechanism bearing unit is preferably surrounded by the first traction mechanism bearing unit in a radial direction, in particular with respect to the bearing axis, when arranged in the receptacle.

[0020] The cable retraction device according to the invention is not intended to be limited to the application and embodiment described above. In particular, the cable retraction device according to the invention may have a number of individual elements, components, and units that differs from the number stated herein to fulfill a function 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

[0021] Further advantages will become apparent from the following description of the drawings. The drawings illustrate three 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.

[0022] They show: Fig. 1 a cable retraction device according to the invention in a perspective view, Fig. 2 the cable retraction device Fig. 1, with a first traction mechanism bearing unit and a further traction mechanism bearing unit in a state detached from a base housing unit of the cable retraction device, Fig. 3 a variant for a coupling unit of the cable retraction device, Fig. 4 an alternative variant for a coupling unit of the cable retraction device, Fig. 5 a cable retraction device according to the invention in a first alternative embodiment in a perspective view, Fig. 6 a schematic cross-sectional view of a part of the cable retraction device from Fig. 5 and Fig. 7 a cable retraction device according to the invention in a second alternative embodiment in a perspective view. Description of the embodiments

[0023] Fig. 1 shows a cable retraction device 10a. The cable retraction device 10a is designed as a battery-operated cable retraction device, which in particular has an energy storage interface 44a, preferably a battery pack interface, for connection to an energy storage device 46a, preferably a battery pack. It is conceivable that the energy storage device 46a is part of the cable retraction device 10a.

[0024] The cable pulling device 10a has a first traction mechanism bearing unit 12a for supporting a first traction mechanism 14a provided for pulling cables into empty conduits. The cable pulling device 10a has at least one further traction mechanism bearing unit 16a for supporting at least one further traction mechanism 18a provided for pulling cables into empty conduits.

[0025] The cable retraction device 10a is designed as a fishtape pulling system and / or as a cable pulling system. The cable retraction device 10a is intended at least for retracting fishtapes, strands, ropes, or the like. Additionally, the cable retraction device 10a can also be designed for dispensing and / or pushing fishtapes, strands, or ropes (e.g., stranded ropes) or the like.

[0026] The following description of the first traction mechanism bearing unit 12a preferably also applies, in particular with the exception of the differences described, to the at least one further traction mechanism bearing unit 16a. The first traction mechanism bearing unit 12a preferably has a base body 34a. The base body 34a at least largely encloses the first traction mechanism 14a in the rolled-up state. The first traction mechanism bearing unit 12a has a traction mechanism drum 36a. The base body 34a forms a bearing space for a rotationally movable bearing element 38a of the cable retraction device 10a, in particular of the first traction mechanism bearing unit 12a, in particular the traction mechanism drum 36a.

[0027] The traction mechanism drum 36a is arranged in the base body 34a for (rotational) movement. The traction mechanism drum 36a is provided for winding and unwinding the first traction mechanism 14a. The traction mechanism drum 36a has a winding axis 40a around which the first traction mechanism 14a can be wound and / or unwound. The winding axis 40a is identical to a bearing axis 42a of the first traction mechanism bearing unit 12a.

[0028] The first traction mechanism fastening unit 12a and the at least one further traction mechanism fastening unit 16a have an identical size, in particular with regard to a maximum diameter of the respective base body 34a and / or a maximum height of the respective base body 34a. The respective maximum diameter is measured in a plane perpendicular to the respective bearing axis 42a. The respective maximum height is measured parallel to the respective bearing axis 42a. Alternatively, however, it is also conceivable for the first traction mechanism fastening unit 12a to be smaller or larger than the at least one further traction mechanism fastening unit 16a, in particular with regard to the maximum diameter and / or the maximum height.

[0029] The cable retraction device 10a preferably has a base housing unit 28a. The first traction mechanism bearing unit 12a and / or the further traction mechanism bearing unit 16a are attached to the base housing unit 28a. It is also conceivable that the base housing unit 28a is formed at least partially in one piece with the first traction mechanism bearing unit 12a and / or the at least one further traction mechanism bearing unit 16a.

[0030] The cable retraction device 10a has a drive unit 20a. The drive unit 20a allows the first traction mechanism bearing unit 12a to be driven separately from the at least one further traction mechanism bearing unit 16a. It is conceivable that the first traction mechanism bearing unit 12a and the at least one further traction mechanism bearing unit 16a can be driven jointly by the drive unit 20a.

[0031] The drive unit 20a has a motor 22a, by which the first traction mechanism bearing unit 12a and the at least one further traction mechanism bearing unit 16a can be driven. It is conceivable that the first traction mechanism bearing unit 12a and the at least one further traction mechanism bearing unit 16a can be driven jointly by the at least one motor 22a. Alternatively, it is additionally conceivable that either the first traction mechanism bearing unit 12a or the further traction mechanism bearing unit 16a can be driven by the drive unit 20a, in particular the motor 22a.

[0032] For example, the cable retraction device 10a has a coupling unit 48a, 48a', via which the first traction mechanism bearing unit 12a and / or the at least one further traction mechanism bearing unit 16a can be connected to the drive unit 20a to form a drive.

[0033] Fig. 3 shows, by way of example, a first variant of the coupling unit 48a. The coupling unit 48a has a coupling lever 50a and a coupling element 52a. The coupling element 52a is arranged between the first traction mechanism bearing unit 12a and the at least one further traction mechanism bearing unit 16a. The coupling lever 50a is movable parallel to the bearing axes 42a of the first traction mechanism bearing unit 12a and the further traction mechanism bearing unit 16a. The first traction mechanism bearing unit 12a and the at least one further traction mechanism bearing unit 16a can be driven either separately from one another or jointly via the coupling lever 50a and the coupling element 52a.

[0034] Fig. 4 shows an example of a second variant of the coupling unit 48a'.

[0035] The drive unit 20a, preferably the motor 22a, is provided to drive the bearing axis 42a of the first traction mechanism bearing unit 12a and / or the further traction mechanism bearing unit 16a, preferably about the respective winding axis 40a. The motor 22a is designed as an electric motor.

[0036] The first traction means 14a and the at least one further traction means 18a differ in at least one traction means characteristic. The traction means characteristic can be, for example, a maximum diameter, a maximum length, a material, a shape, or the like. The first traction means 14a and the at least one further traction means 18a have different lengths.

[0037] The first traction means 14a is embodied here, for example, as a steel spiral. The further traction means 18a is embodied here, for example, as a steel band. The cross-section of the at least one further traction means 18a is at least substantially constant along a longitudinal extent of the at least one further traction means 18a.

[0038] The cable retraction device 10a has a base housing unit 28a. The base housing unit 28a has at least one fastening interface 30a for releasably fastening the first traction mechanism bearing unit 12a and / or the at least one further traction mechanism bearing unit 16a. The fastening interface 30a has, for example, at least one locking element, in particular a locking lug and / or a locking recess, a clamping element, a screw element, or the like for fastening the first traction mechanism bearing unit 12a and / or the further traction mechanism bearing unit 16a. The first traction mechanism bearing unit 12a and / or the at least one further traction mechanism bearing unit 16a have / have a mounting interface 54a corresponding to the fastening interface 30a. The first traction mechanism bearing unit 12a and / or the at least one further traction mechanism bearing unit 16a can be detached from the base housing unit 28a, in particular the fastening interface 30a, without the use of tools.

[0039] The cable retraction device 10a has at least one detection unit 26a. The detection unit 26a is configured to detect a characteristic variable, in particular a presence, with respect to the first traction mechanism bearing unit 12a, the at least one further traction mechanism bearing unit 16a, the first traction mechanism 14a, and / or the at least one further traction mechanism 18a.

[0040] It is conceivable that the detection unit 26a is mechanically designed, for example, has at least one button or the like, which can be actuated by mounting the first traction mechanism bearing unit 12a and / or the at least one further traction mechanism bearing unit 16a, that the detection unit 26a has a sensor system for detecting the characteristic variable and / or that the detection unit 26a has a selection element, in particular operable by an operator, for example a selector switch for entering the characteristic variable.

[0041] The sensor system can, for example, comprise an optical sensor, a mechanical sensor, an electrical sensor, or any other sensor deemed appropriate by a person skilled in the art. The characteristic corresponds to the presence of the first traction mechanism bearing unit 12a and / or the further traction mechanism bearing unit 16a on the base housing unit 28a.

[0042] Alternatively, it is also conceivable that the characteristic corresponds to the presence of the first traction means 14a in the first traction means bearing unit 12a and / or the at least one further traction means 18a in the at least one further traction means bearing unit 16a. Alternatively, it is also conceivable that the characteristic is a traction means bearing unit characteristic, which is, for example, a size, in particular a maximum height and / or a maximum diameter, a weight or the like, of the first traction means bearing unit 12a and / or of the at least one further traction means bearing unit 16a. Furthermore, it is alternatively conceivable that the characteristic is the traction means characteristic.

[0043] It is also conceivable that the detection unit 26a is configured to detect a plurality of parameters relating to the first traction means bearing unit 12a, the further traction means bearing unit 16a, the first traction means 14a and / or the further traction means 18a.

[0044] The cable retraction device 10a has a control unit (not shown here) which is provided for controlling the drive unit 20a. The control unit is arranged at least partially on, in particular in, the base housing unit 28a. It is conceivable that the detection unit 26a is at least partially formed by the control unit.

[0045] The detection unit 26a is provided to determine a control parameter for the drive unit 20a, at least as a function of the characteristic variable. The control parameter is, for example, a drive speed, a drive enable, a drive blockage, a tensile force, or the like. The control unit is provided to take at least the control parameter into account when controlling the drive unit 20a.

[0046] The first traction mechanism bearing unit 12a and the at least one further traction mechanism bearing unit 16a are arranged at a distance from one another. The first traction mechanism bearing unit 12a and the at least one further traction mechanism bearing unit 16a are arranged on opposite sides of the base housing unit 28a. The bearing axis 42a of the first traction mechanism bearing unit 12a runs at least substantially parallel to the bearing axis of the further traction mechanism bearing unit 16a. Alternatively, it is conceivable that the bearing axis 42a of the first traction mechanism bearing unit 12a runs transversely, in particular different from parallel, for example at least substantially perpendicularly, to the bearing axis of the further traction mechanism bearing unit 16a.

[0047] In the Fig. 5 to 7 show further embodiments 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 4. To distinguish the embodiments, the letter a is added to the reference numerals of the embodiment in the Fig. 1 to 4. In the examples of the Fig. In paragraphs 5 to 7, the letter a is replaced by the letters b and c.

[0048] Fig. 5 shows a cable pulling device 10b. The cable pulling device 10b has a first traction means bearing unit 12b for supporting a first traction means 14b provided for pulling cables into empty conduits.

[0049] The cable pulling device 10b has at least one further traction means bearing unit 16b for supporting at least one further traction means 18b provided for pulling cables into empty conduits.

[0050] The cable retraction device 10b has a drive unit 20b. The drive unit 20b is arranged on a base housing unit 28b of the cable retraction device 10b. The drive unit 20b has a motor 22b for driving the first traction mechanism bearing unit 12b and a further motor 24b for driving the at least one further traction mechanism bearing unit 16b (see FIG. Fig. 6).

[0051] The first traction means 14b and the at least one further traction means 18b are coupleable. The first traction means 14b and / or the at least one further traction means 18b are / are removable from the respective traction means bearing unit 12b, 16b. For example, a free end 56b of the first traction means 14b and a free end 58b of the at least one further traction means 18b are coupleable, preferably fastened to one another, preferably releasably fastened.

[0052] Fig. 7 shows a cable pulling device 10c. The cable pulling device 10c has a first traction means bearing unit 12c for supporting a first traction means 14c provided for pulling cables into empty conduits.

[0053] The cable pulling device 10c has at least one further traction means bearing unit 16c for supporting at least one further traction means 18c provided for pulling cables into empty conduits.

[0054] The first traction mechanism bearing unit 12c has a receptacle 32c for the at least one further traction mechanism bearing unit 16c. The first traction mechanism bearing unit 12c and the further traction mechanism bearing unit 16c are arranged coaxially when mounted on a base housing unit 28c of the cable retraction device 10c. The further traction mechanism bearing unit 16c is surrounded by the first traction mechanism bearing unit 12c in a radial direction, in particular with respect to a bearing axis 42c of the further traction mechanism bearing unit 16c, when arranged in the receptacle 32c.

Claims

[1] Cable pulling device (10a - 10c) with a first traction means bearing unit (12a - 12c) for supporting a first traction means (14a - 14c) provided for pulling cables into empty conduits, characterized by at least one further traction means bearing unit (16a - 16c) for supporting at least one further traction means (18a - 18c) provided for pulling cables into empty conduits. [2] Cable retraction device (10a - 10c) according to claim 1, characterized by at least one drive unit (20a - 20c) by which the first traction mechanism bearing unit (12a - 12c) can be driven separately from the at least one further traction mechanism bearing unit (16a - 16c). [3] Cable retraction device (10a) according to claim 1 or 2, characterized by at least one drive unit (20a) with at least one motor (22a), by means of which the first traction mechanism bearing unit (12a) and the at least one further traction mechanism bearing unit (16a) can be driven. [4] Cable retraction device (10b) according to one of the preceding claims, characterized by at least one drive unit (20b) which has a motor (22b) for driving the first traction mechanism bearing unit (12b) and a further motor (24b) for driving the at least one further traction mechanism bearing unit (16b). [5] Cable retraction device (10a) according to one of the preceding claims, characterized by that the first traction means (14a) and the at least one further traction means (18a) differ in at least one traction means characteristic. [6] Cable retraction device (10a) according to claim 5, characterized by that the first traction means (14a) and the at least one further traction means (18a) have different lengths. [7] Cable retraction device (10b) according to claim 5 or 6, characterized by that the first traction means (14a) and the at least one further traction means (18b) can be coupled. [8] Cable retraction device (10a) according to one of the preceding claims, characterized by a base housing unit (28a) which has at least one fastening interface (30a) for a releasable fastening of the first traction mechanism bearing unit (12a) and / or the at least one further traction mechanism bearing unit (16a). [9] Cable retraction device (10a) according to one of the preceding claims, characterized by at least one detection unit (26a) which is configured to detect a characteristic variable, in particular a presence, with respect to the first traction means bearing unit (12a), the at least one further traction means bearing unit (16a), the first traction means (14a) and / or the at least one further traction means (18a). [10] Cable retraction device (10a) according to claim 9, characterized by that the at least one detection unit (26a) determines a control parameter for a drive unit (20a) at least as a function of the characteristic variable. [11] Cable retraction device (10a) according to one of the preceding claims, characterized by that the first traction mechanism bearing unit (12a) and the at least one further traction mechanism bearing unit (16a) are arranged at a distance from one another. [12] Cable retraction device (10c) according to one of the preceding claims, characterized by that the first traction mechanism bearing unit (12c) has a receptacle (32c) for the at least one further traction mechanism bearing unit (16c).

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