DE1481173A1 - Rope scraper device for loading a dispenser for bulk goods - Google Patents

Description

DÜSSELDORF α PATENT LAWYERS Malkastenstra £ e2 * DIPL.-ING. ALEX STENGER

Telephone (0211) 3 * 0514 1481173 DIPL.-ING. WOLFRAM WATZKE

Our Zeidieni 7l87-a Date: August 2, 1968

P 14 Bi 173.5

(E 32 333 XI / 8le)

ELBA-WERK. Ettlinger Baumaaohinen ~ and Hebezeußfa / brik G-iahI-ΐ. , 7505 Ettlingen, Germany

Rope scraper device for feeding a dispenser for bulk goods

The invention relates to a "Seilsohrappervorriohtung for loading a dispenser for bulk goods", in particular building materials for concrete preparation plants, with material stores arranged in sectors around the central dispenser and with an approximately L-shaped, on the one hand rotatable on the dispenser and on the other hand movably supported bridge outside the material store , in or on which a Pahr drive, a rope ear ripper drive with two rope drums for a pull and return rope that engages a scraper box and, if necessary, a reversing roller and T guide rollers are mounted

F '-; U (? 1 Jr ⁺ P "' infin f * rf - ? * * ^ P *» Nr 1 P- «z 3 des ÄnrterunÄl ·». V. 4.

909804/0885

Bel the known Seilsohrappervorrlchtungen the above "designated genus let those of an electrically operated Wind "pulled" but by a dog operator Rope ear scraper shovels to be guided and withdrawn from the material store have been replaced by so-called cantilever scrapers, in which the operator uses the Controls the movement sequence of a scraper box guided on the boom from a fixed location without having to enter the material store. In these known Seilsohrappervorriohtungen the boom is in the indifferent Balance rotatably mounted on the feeder and outside of the material store with a plug-in foot or a hollow supported. The location for the operator with the necessary operating devices for controlling the work cycle of the Sohrapperkaatena with a pulling and a return winch is either at the pivot point of the boom on the allocator or at the opposite end at the PuB des Material warehouse »where the boom is supported. In these known ßeilsohrappervorriohtungen the scraper box is auoh already in a · consisting of a pulling and a lifting rope · suspended rope loop, with the eückholseil transmission anchored on the boom outside of the material store · reversing roller is guided

This is also true of these known boom sohrapper devices continue to save necessary operator,

8AD ORIGINAL 809804/0835

it has already been prepared «the material store with an approximately I-shaped» on one side rotatable on the dispenser and on the other side mobile supported on the floor Brüoke to ttrepannen and ddrin the rope chapper drive with two rope drums for a pulling and roping rope with the necessary rope that engages a Sohrapper box To accommodate the reversing roller and the guide rollers. At this Rope ear clipper device consists of the rope ear clipper drive There are two separate winches for the pull and return rope. To control dee in the vertical plane about triangle «- Shaped movement sequences of the Sohrapper box is that Eüokholeeil in a loop in the middle of the brunch via one on the piston rod of a pressure cylinder attached pulley out. When the piston rod is pulled in, the back wedge is shortened »wherefore that too Total length of the existing pull and return ropes The rope sole hoop can be shortened and the Sohrapper box can be raised in a certain working position. That is This is because it is absolutely necessary to automate the work cycles of the scraper box »because the scraper box raised on top of the embankment of the material store, floating ssurüokgeeogen and must be lowered again in front of the material store, so that the soil has to be on the embankment of the material store only transported near the top and not also near the bottom

90980A / 0885

-V

The known Seilsohrappervorriohtung with a working cylinder Bum lifting doe Sohrapperkaetene has the disadvantage that a compressor or a pump with the necessary Lines and additional devices for the operation of the working cylinders must be provided. Because the necessary Shortening of the Bttokholseile only over a very long one Piston travel can be achieved, a long working cylinder and an equally long piston rod are required. This inevitably requires a further effort for the arrangement of special piston rod guides. That Shorten the Rttokholeeiles with a working cylinder also the disadvantage that the working cycles of the scraper body cannot run smoothly because the piston rod only retracts and extends at moderate speed can be. This results in delays in the operation of the Sohrapperkast, which sioh on the performance adversely affect the entire facility. In addition, the multiple diversions accelerate with relatively small Radius of curvature the wear and tear of the Rüokholseile quite significantly «

The invention has set it eioh the task of sohaffen a Seilsohrappervorriohtung in which the work cycles de · Sohrapperkastena run smoothly and the successive phases of movement of the Sohrapperkastens only from that

BAD ORIGINAL '909804/0885

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All compact built-in components are equipped with a rope scraper drive · In addition, the impulses for the necessary reversals of the rope ear clip drive from Sohrapperkasten are given by yourself. Finally, the overall rope chapper arrangement should be made so that it The same operator can start up the system from a central command station the other facilities of the concrete preparation plant or the like. In addition, the invention is based on the object to remove the naughty parts of the leohnik class.

Starting from a well-known Seilsohrappervoriohtung to Besohioken an arbiter for SohUttgttter, in particular Building material for concrete preparation plant ^ with around the central Allocator sektorsnfttrmlg arranged and attached material assemblies and with an approximately L-shaped, on the one hand rotatable on the feeder and on the other hand outside of the material warehouse movably supported Brüoke, in or on the sin travel drive, a rope ear rappet drive with two rope drums for a pulling and Rüokholeell and optionally a reverse roller and Guide rollers are mounted, the invention is based Lying task · solved by the fact that the rope drums of the rope ear rappers drive in both end positions of the rope rappel box «by tensioning bow · slackening of the pull and pull rope a

BATH

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are rotatable relative to each other »and that in the path of movement of the viewing box or on the pulling and pulling rope attached cable bulbs electrical Sohaltmittel for the continuous control of several successive work cycles dee Sohrapperkastene are arranged.

The Seilsohrappervorriohtung formed according to the invention has the advantage that both the tensioning of the rope sole in the upper position of the sohrapper box on the slope of the material store, as also the relaxation of the rope sole hoop in the eurttok pulled position of the Sohrapperkaetens Above the end of the embankment at the foot of the material store, • ohließlioh takes place in the rope earmuff drive itself. From it results in a fluid sequence of movements in the work cycles de · Sohrapperkastene, with this one in the vertical plane rounded, three-cornered track rubbed on. Another advantage It helps to ensure that the beginning and end of the individual phases of movement are simple to push the rope pears on the Zug- or Rüokholieil can be determined. In this way can there rounded movements triangle of the Sohrapperkastena can be changed in just a few steps, although the stiliohrapper drive with the sail drums is functional directly on the distributor in the horizontal sole handle and the reverse roll for <"ae BUokholseil in the knee of the bracke are arranged stationary «.

B /

8098047088 $

U81173 -T-

Xn a preferred embodiment of the invention formed Selleohrappervorrlohtung the Seilechrapperantrieb eo is formed that the two cable drums with the interposition of a planetary gear are arranged on a common drive shaft, wherein the pull-rope drum is resistant to torque on the drive shaft is stored, while the Rüokhol rope drum is freely rotatable Is mounted on the drive shaft, but can be connected by means of clutches either indirectly via the planetary gear or directly to the drive shaft. There is the planetary gear is expediently made up of a carrier with a satellite wheel that is freely rotatable on the drive shaft, one mounted on an axial leg of the girder and frictionally connected to the bridge via a torque enc connected sun gear with an outer ring gear and an inner ring gear in the pull-rope drum, the 5rabs.nten wheels with the outer ring gear on the sun gear and the Comb the inner gear cranes in the pull rope drum. The clutches in this form are useful as formed electro-magnetieohe multi-plate clutches.

In this preferred embodiment, the necessary holding means expediently consist of rope pears fixed on the pull and return rope and limit switches arranged in their path of movement. The impulse to end the tensioning the rope sole hoop is expedient in this embodiment

809804/0885

U81173

exercised by a rüokholao holder who is in motion track a holding lever is attached to the elastically suspended reversing roller.

The embodiment described above with the planetary gear between the pulling cable drum and the Rüokhol ~ cable drum has the advantage that the working speed of the Sohrapperkaatens can be selected to be very high can · This advantage is supported by the fact that the electrical Sohaltmittel and the electromagnetic multi-plate clutches respond almost without delay and hardly cause additional downtime.

Bell dner further embodiment of the Sohrappervorriohtung according to the invention, the Seilsohrapperantrieb can be designed so that the cable drums on a common Drive shaft are arranged »with the pull-rope drum being rotatably mounted on the drive shaft, while the Rüokhol-rope drum with the interposition of a Coupling is either freely rotatable or also mounted torque-free on the drive shaft. In this embodiment, the RUokhol ~ rope drum is useful liner mechanically acting Haohlaufbremse connected to it unnecessary slack rope when pulling the Sohrapperkaetens does not arise »

90980 U1 0885 ^BAD

The two embodiments described above the rope scraper device according to the invention habon together have the advantage that only one drive motor is required for both cable drums, with which all movement processes of the Sohrepperkastens by relative rotation of the two rope drums. Different rotations or speed differences between the two cable drums can also be achieved in a further embodiment of the inventive concept if the two cable drums are mounted on the shaft journals of various drive motors.

In a preferred embodiment with two separate Both rope drums are torque-proof as drive motors mounted on their shaft journals and the tensioning or * relaxing of the rope base is done by temporarily switching off the «internal drive motor ·

In another embodiment with two separate The drive motor for the two cable drums is the drive motor for the pull cable drum, expediently directly on the feeder and, instead of the reversing roller, the other one Drive motor with the Eüokhol rope drum in the knee of the Bridge arranged · at dltstr the drive motor for the EUokhol rope drum is practical

808804/0885

a freewheel and a mechanically acting overrun brake, so no slack rope when pulling the scraper box “On the other hand, the drive motor for the pull-rope drum has a two-fold lower speed ale the drive motor for the retrieval cable drum, so that ereter when retracting the scraper box than Strombrease works and also in this movement phase the creation of too much sole rope is avoided.

The two last-described embodiments of the Seilsohrappervorriohtung according to the invention with separate Drive motors for the two cable drums have the gate part that the cable drums also one behind the other in the Brüoke can be arranged, or - as with the - last version - even separated from each other, whereby the RUokhol rope drum with its drive motor can be relocated to the knee of the Brüoke.

Further details, features and advantages of the subject matter of the invention can be found in the following information of the accompanying drawings, in which some preferred AusfUhrungsformen a cable ear clipper device according to the invention sohematisoh are represented. Beige in the drawings

BAD ORlG ¹ NAL 909804/0885

1 shows a rope scraper device in side view;

Pig. 2 a rope ear clipper device with a drive motor and between the 3 part drums built-in Planetary gear · in view;

yig. J an enlarged section of the same rope ear clipper device to the Yeranachaullchung des Planetary gears in the drive partly in section;

Pig. 4 a top view of another cable ear rappet device with a drive motor and an electromagnetic clutch installed between the cable drums}

Pig. 5 a Seilsohrappervorriohtung with two separate drive motors and one elastically suspended Reversing roller in plan view;

Pig «6 a rope scraper device with two separate ones Drive motors without return of the return oil in plan.

Pigur 1 shows a device according to the invention sohematisoh, whereby from a feeder 1 with a take-off device 2 for a solids 5 and aneohlußvorriohtungen 4 for sectors forming partitions - not shown - starting from a bridge 5 spans the material store which is boiled towards the feeder 1. The bridge 3 is on the one hand with its horizontal leg 5a

9-0 9804/088 * 5

U on the feeder 1 rotatably mounted and supports egg oh. on the other hand, with its vertical legs 5b on the ground outside the material store with an impeller 6. A remote-controlled, electric drive 7 is arranged in the bridge 5 directly above the impeller 6. At the opposite end is dioht the allocator 1 is a elektrisoher Seilsohrapperantrieb "incorporated 8 with separate cable drums and Seilführungseinriohtungen for one consisting of a traction cable 9» a Eüokholoeil 10 and a hinged Sohrapperkasten 11 Seileohleife in the Brüoke this case, the Eüokholseil 10 for the Sohrapperkasten 11 Wo9T a In the knee of the L-shaped Brüoke 5 mounted reversing roller 12 out. Under the approximately horizontal leg 5a of the bridge 5, the Eüokholseil 10 is held in guide rollers 13 so that as little slack rope as possible occurs when the Sohrapperkasten 11 is pulled up on an embankment H of the bulk material 3.

The Seilsohrapperantrieb θ shown in Figures 2 and 3 consists of an electric motor 21 , a coupling 22 and two cable drums 25t 26 mounted between bearing brackets 23 on a drive shaft 24, the pulling cable 9 on the bottom of the cable drum 25 and the Eüokholstil 10 on top of the cable drum is placed 26 in order

BATH ORIGINAL

909804/0885

Ί481173

the rope sole hoop (9, 10) in the same direction of rotation and a speed of rotation of the cable drums 25, 26 remains evenly tensioned.

The cable drum 25 for data pull rope 9 is in this Embodiment of the rope scraper drive with a feather key 27 fixed torque-free on the drive shaft 24, while the cable drum 26 for the Sücklioleeil 10 with Rolling bearings 28 is freely rotatable on the drive shaft 24, but indirectly through a planetary gear 29 and an electromagnetic multi-plate clutch 30 or directly through a further electromagnetic multi-plate clutch 31 and one with a feather key 32 torque, tenfeet on the drive shaft 24 attached coupling ring 33 can be coupled to the drive shaft 24.

The planetary gear 29 consists of a carrier 35, mounted on the drive shaft 24 with roller bearings 34, for Srabantan wheels 36, which on the one hand came with a ring gear 37 in the cable drum 25 and on the other hand with a ring gear 38 on a sun gear 39. The sun gear 39 is mounted with bearings 40 on the axial leg of the Slower 35 and Vßtev a Drehmomentenstützö 41 with the BrUokt 5 and the bearing bracket for the Seilsohrapperantrieb 8 is connected. The axial loop of the carrier 35

909804/0885

is designed as the primary side for the electromagnetic multi-plate clutch 30 at its end.

In the above-mentioned planar embodiment of the sella ear clipper device according to the invention, the following mode of operation is possible

In the Sohrappzug shown in solid lines in FIG. 1 , both cable drums 25, 26 are driven directly by the drive shaft 24, ie the multi-plate clutches 30, 31 on the planetary gear 29 are open. As soon as the Sohrapperkaaten 11 has reached its uppermost end position on the embankment 14, a limit switch 43 is actuated with a cable pear 42 fixed on the pulling cable 9, which on the one hand switches off the drive motor 24 and reverses, and the multi-plate clutch 30 sohliessen so that the cable drum 26 is indirectly coupled to the drive shaft 24 via the planetary gearbox 29. As a result , at the beginning of the now following Bückholzuges the cable drum 26 according to the gear ratio of the planetary gear 29 rotated faster than the other cable drum 25 »ao that eioh the rope loop (9, 10) and the scraper box 11 empties and lifts. The tensioning of the rope sole hoop (9, 10) is finished as soon as

BATH & 098QW0885

dle on a Ausgleiohafeder 44 elastically suspended reversing roller 12 titer a switching lever 45 actuates a return BO holder 46. The Rüokholeohalter 46 reverses the polarity of the multi-disc clutches 30, 31 in such a way that the multi-disc clutch 30 on the plcmetary gear 29 is opened and the other (31) is closed, so that both cable drums 25, 26 are driven synchronously by the drive shaft 24. Thereafter, the Sohrapperkasten 11 * is withdrawn floatingly in the rüokhollage shown in dashed lines in the figure, until a rope pear 47 fixed on the Rüokholseil 10 actuates an endo holder 48. On the one hand, the drive motor 24 is switched off via the limit switch 48 and reversed via a time relay (not shown), while at the same time the multi-plate clutch 31 is released so that the Rttokholseil 10 can unwind under the tension exerted by the weight of the scraper box 11 " dor Schrapperkasten 11 "as in Figure 1 strioh-dotted lowered position shown, and sets at the end of the slope 14 · the setback can be set at the mentioned time relay, which for the following working cycle '~" einaohaltet ". J ^{of the} drive motor 24. The work cycles are repeated until the Seilsohrappervorriohtung at the command post for the entire concrete preparation plant or the like. Is switched off.

The Seilsohrappervorriohtung shown in Figure 4 consists of an electric motor 51 »a chain drive $ 2.

909804/0885

and iswei between bearing blocks 53 mounted on a drive shaft cable drums 55 _f 56, wherein the traction cable 9 at the bottom of the rope drum 55 and daa Rüclcholseil 10 o "bon placed on the cable drum 56 so that the cable loop (9, 10) with equidirectional direction of rotation and a synchronous Speed of the cable drums 55 »56 remains evenly tensioned.

In this embodiment, the cable drum 55 is torque-free mounted on the drive shaft 54, while the cable drum 56 by means of an electromagnetic Multi-disc clutch 57 can optionally be mounted on the drive shaft 54 or freely running. In addition, there is a mechanical, adjustable one on the cable drum 56 Naonlaufbremsa 53 provided.

With this embodiment of the rope ear clip device according to the invention the following working method is possible

When in Figure 1 shown with solid lines Schrappjsug the cable drum 55 is driven directly, while the other cable drum 56 is running freely the drive shaft 54 unwinds and with overrun br em β β 58 the occurrence of slack rope is avoided. As soon as the Sohrapperkaeten 11 on the Bösohung 14 legs obtrett has reached a position with one on the

BATH 909804/0 885

ΊΤ

Pull rope 9 fixed rope pear 59 actuates a limit switch 60, which on the one hand switches off the drive motor 51 and ravere, but on the other hand also the multi-plate clutch at the same time 57 switches on and thus also switches the cable drum 56 firmly onto the drive shaft 54. After that, will the Sohrapperkastan 11 »in the one in FIG. 1 with a dashed line RUckholzug shown floating withdrawn until a rope pear 61 fixed on the Büokholaeil 10 a Bndschalter 62 actuated, which on the one hand switches off the drive motor 51 and via a - not shown - time relay revereiert, but on the other hand also the multi-plate clutch at the same time 57 last, so that the Rüokholeeil 10 under the Effect of the 11 "exercised by the Gewioht dea Sohrapperkastona Train is unwound from the cable drum 56. The lowering time can be set on the above-mentioned time relay, from which the following work cycle is also switched on of the drive motor * 51 is initiated.

The Seilsohrappervorrichtung shown in Figure 5 has two separate drive motors 71, 72 with on their Shaft journal 73 »74 rope drums with torque-free bearings 75t 76 »with the pull rope 9 on top of the rope drum 75 and the return rope 10 down on the rope drum 76 launched iat.

BAO 909804/0885

- Ί8 -

With this embodiment of the Soilsohrappervorriohtung according to the invention the following working method is possible:

In the case of the one shown in FIG. 1 with solid lines Sohrappaug "both cable drums 75, 76 are driven synchronously, wherein the cable drum 75 winds up the pull cable 9 and ßioh the Rüokholseil 10 from the other cable drum 76 unwinds. As soon as the scraper box 11 on the Embankment 14 has reached its uppermost position, a rope pear 77 fixed on the pull rope 9 becomes an end holder 78 actuated, which stops both drive motors 71 »72 and only the drive motor 72 reverses at the same time · By winding the return rope 10 and the The rope loop becomes the torque of the drive motor 71 (9, 10) stretched and the Sohrapper box 11 ontleert. Of the The tensioning process is terminated when the reversing roller 12, which is elastically suspended on a compensating spring 79, with a Shift lever 80 a Hüokho Ischalt he operated 81, the Drive motor 71 with the corresponding Rttokholzug Prehriohtung switches on again. After that, the scraper box 11 * withdrawn, floating, until one on the back wedge 10 fixed cable pear 82 actuates a limit switch 83 »which switches off both drive motors 71, 72 and the The drive motor 72 reverses so that the scraper box 11 "lowers. The limit switch 83 has a - not

90 9804/0 88 5 BAD OWG.NAL

shown - time relay also the other drive motor 71 reversed and switched on again, which means that after the Sohrapper box 11 has been placed on the embankment 14 a new work cycle begins.

The rope scraper device according to the invention shown in FIG. 6 also has two separate drive motors 91 »92, on whose shaft journals 93, 94 a cable drum 95 torque-proof and another rope drum with the interposition of an electromagnetic multi-plate clutch 97 is stored. There is also no mechanical one on the cable drum 96 for the EUokhole cable 10 let Naohlaufbremse 98 is provided. The drive motor 92 for the Rüokholseil 10 is in this embodiment in the knee Bridge 5 mounted so that the reversing roller 12 and the guide roller η 13 is omitted.

With this last embodiment of the rope ear clip device according to the invention, the following mode of operation is possible

In the one shown in Figure 1 with solid lines Sohrappzug is only the drive motor 91 switched on, while the multi-plate clutch 97 is released and the Bückholeeil against the resistance of the overrun brake 98 is unwound from the cable drum 96. As soon as the Sohrapperkasten 11 reaches its highest position on the embankment 14

909804/0885

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has reached is fixed by one on the pull rope 9 S.ilbirne 99 actuates a limit switch 100, on the one hand the drive motor 91 switches off and reverses, but at the same time the multi-plate clutch 97 also solves and the drive motor 92 switches on. The speed of the drive motor 92 is slightly greater than that of the other drive motor 91 selected so that the latter (91) is inevitably drawn with oversyno-speed and as a current brake works. As a result, the pulling and retrieval ropes 9 »10 are tensioned, so that the Sohrapperkasten 11 emptied and pulled back in a floating manner is until a fixed on the Eückholseil 10 rope pear 101 actuates a limit switch 10-2, which the drive motor 92 isolates and releases the multi-disc clutch 97, but at the same time also switches off the drive motor 91 and reversed via a time relay. This allows you to use the Eüekholeeil Unwind 10 under the pull of the scraper box 11 "from the cable drum 96 and lower the scraper box 11", until it is attracted again by the drive motor 91, which has now reversed. * This begins a new job game.

All new features mentioned in the description and shown in the drawings are inventive, also 8 or not in the following claims expressly claimed.

ÖAD OWGiNAL

909804/0885

Claims (1)

4 8 YYY Patent claims: 1 · Rope shredder device for loading a feeder for bulk goods, in particular building materials for concrete preparation plants with material stores arranged in sectors around the central distributor and sloping down, and with a approximately L-shaped, on the one hand rotatable on the feeder and on the other hand, mobile supported outside the material store Bridge, in or on which a traction drive, a scraper drive with two rope drums for a pulling and retrieval rope that attacks a Sohrapper box and, if necessary a natural sweeping roller and guide rollers are installed, whereby the cable drums of the cable scraper drive are in both end positions of the scraper box for tensioning and relaxing the pulling and retracting ropes are rotatable relative to each other, daduroh marked that the two Cable drums (25, 26) with the interposition of a planetary gear (29) arranged on its own common drive shaft (24) are, the pull-rope drum (25) torque-proof and the retrieval cable drum (26) freely rotatable by means of couplings (Multi-disc clutch 3o, j51) indirectly via the planetary BATH 9098Q4 / Q885 gear (29 or directly connected to the drive shaft (24) are mounted on this, and that in the movement path of the scraper box (11) or on the pull (9) and RUckholseil (lo) attached rope pears (42,47; 5o, 6l ; 77.82; 99AoI) electrical switching means (limit switches 43.48; 6o, 62; 78.83; Ioo, lo2 and return switch 46.8l) are arranged for the continuous control of several successive working cycles of the scraper box. 2 · rope scraper device according to claim 1, characterized in that the planetary gear (29) from one on the drive shaft (24) freely rotatably mounted carrier (35) with satellite wheels (36), one on one axial leg of the carrier (35) mounted and over a torque support (41) with the bridge (5) KraftsohlUssig connected sun gear (39) with an outer ring gear (38) and an inner ring gear (37) in the Pull rope drum (25) with which (33,37) mesh the satellite wheels (36). 3 »rope chapper device according to claims 1 and 2, characterized in that between the axial leg of the support (35) for the satellite wheels (3β) and the Rüokholceiltrommel (26) an electromagnetic one Multi-disc clutch (3o) is arranged. BATH 909804/0885 4; Rope ear clipper device according to claims 1 to 3 # characterized in that between the return. Cable drum (26) under a torque firmly on the Drive shaft (24) mounted coupling ring (33) another electromagnetic multi-disc clutch (31) is arranged. 5. Seilsohrappervorrichtung according to claims 1 to 4, characterized «that the reversing roller (12) with a Ausgleiohsfeder (44) attached to the bridge (5) and has a switch lever (45) for actuating a return switch (46). 6. Sellschrappervorrlchtung according to claim 1, characterized in that that the cable drums (55,56) are arranged on a common drive shaft (54), wherein the pull rope drum (55) torque-proof and the return rope drum (56) with the interposition of a clutch (multi-disc clutch 57) freely rotatable or torque-proof is stored. 7. rope scraper device according to claims 1 and 6, characterized in that the RUckhol-Selltrommel (56) has a mechanically acting overrun brake (58). 8. rope scraper device according to claim 1, characterized in that that the cable drums (75,76) are torque-proof on the drive shafts (73 * 74) of separate drive motors (71,72) are arranged, and that the reversing roller (12) is fastened with a compensating spring (79) in the knee of the bridge (5) is. 909804/0885 9. Rope scraper device according to claim I, characterized in that the drive motor (91) with the pull rope drum (95) directly on the feeder (1) in the horizontal arm (5a) and that the drive motor (92) with the return rope drum ( 96) are arranged in the knee of the bridge (5). 10. Rope scraper device according to claims 1 and 9 » characterized in that the return cable drum (96) with the interposition of a clutch (multi-disc clutch 97) is mounted on its shaft journal (94) and connected to a mechanical overrun brake (98). 11. Seilschrappervorrichtung according to claims 1, 9 and 10, characterized in that the drive motor (91) for the pull rope drum (95) has a lower speed than the drive motor (92) for the return rope drum (96).