SI25661A

SI25661A - Forestry winch with sophisticated protection while guiding the tow rope in the area of upper pulley

Info

Publication number: SI25661A
Application number: SI201800132A
Authority: SI
Inventors: Damjan Gobec; David Kozinc
Original assignee: Tajfun Planina Proizvodnja Strojev, D.O.O.
Priority date: 2018-06-01
Filing date: 2018-06-01
Publication date: 2019-12-31

Abstract

Izum se nanaša na gozdarski vitel (1) z izpopolnjenim varovanjem med vodenjem vlečne vrvi (10) v območju zgornjega škripčnika (2). Omenjeni škripčnik (2) je opremljen z vodilom (23) vlečne vrvi (10), ki obsega vodilno pušo (231), ki je razporejena na radialnem odmiku od zunanjega oboda omenjene vrvenice (22) in skozi katero je zaradi vodenja vstavljiva vlečna vrv (10). Omenjena vodilna puša (231) pričvrščena na dvojici krakov (232, 233), ki sta razporejena vsak na svoji strani omenjene vrvenice (22) inskupaj z omenjeno vodilno pušo (231) vsaj za določen kot relativno glede na okrov (21) zgornjega škripčnika (2) zasukljiva okoli omenjene horizontalne geometrijske osi (20"), okoli katere je sicer vrtljiva tudi omenjena vrvenica (22). Kot zasukljivosti omenjenega vodila (23) okoli omenjene horizontalne geometrijske osi (20") znaša vsaj 100 stopinj oz. je vsaj tolikšen, da vlečna vrv (10) skozi omenjeno vodilno pušo (231) v smeri proti vsakokratnemu bremenu lahko poteka bodisi poševno navzgor invstran od podlage ali pa v smeri navzdol vsaj približno pravokotno proti podlagi. V območju med okrovom (21) zgornjega škripčnika (2), namreč v območju v bližini vrvenice (22) in preko slednje potekajoče vlečne vrvi (10), in vodilom (23) vlečne vrvi (10) je nameščeno varovalo (3) vlečne vrvi (10), ki je po eni strani pritrjeno na omenjen okrov (21) in po drugi strani na omenjeno vodilo (23), tako da vsaj v pretežni meri zastira v obodni smeri vrvenice (22) potekajočo vrzel med okrovom (21) zgornjegaškripčnika (2) in vodilom (23) vlečne vrvi (10) na zgornjem škripčniku (2).The invention relates to a forestry winch (1) with advanced protection while guiding the tow rope (10) in the area of the upper pulley (2). Said pulley (2) is provided with a guide (23) of a draw rope (10) comprising a guide sleeve (231) disposed at a radial distance from the outer circumference of said draw rope (22) through which a draw rope (10) is inserted for guiding purposes. 10). Said guide sleeve (231) fastened to a pair of arms (232, 233) disposed on each side of said rope (22) together with said guide sleeve (231) at least as defined as relative to the upper pulley housing (21) (21). 2) rotating about said horizontal geometric axis (20 "), around which the said rope (22) is also rotatable. The rotation angle of said guide (23) about said horizontal geometric axis (20") is at least 100 degrees or. is at least such that the tow rope (10) through said guide sleeve (231) in the direction of the respective load can either be inclined obliquely inward from the base or downward at least approximately perpendicularly to the base. In the area between the housing (21) of the upper pulley (2), namely in the area near the rope (22) and through the latter running rope (10), and the guide (23) of the rope (10), a rope guard (3) is mounted (10), which is fixed on one side to said housing (21) and, on the other, to said guide (23), so that at least substantially the gaps in the circumferential direction of the rope (22) close the gap between the upper housing (21) housing (21). 2) and the guide (23) of the tow rope (10) on the upper pulley (2).

Description

Gozdarski vitel z izpopolnjenim varovanjem med vodenjem vlečne vrvi v območju zgornjega škripčnikaForestry winch with sophisticated protection while guiding the tow rope in the upper basement area

Izum na področju delovnih operacij in transporta spada k napravam za dviganje, privzdigovanje ali vleko, konkretno k vitlom, namreč h konstrukcijskim podrobnostim le-teh. Po Mednarodni klasifikaciji patentov tovrstni izumi spadajo v razred B 66 D 01/28.The invention in the field of work operations and transportation belongs to the lifting, lifting or towing devices, specifically to winches, namely to the structural details thereof. According to the International Patent Classification, such inventions fall within Class B 66 D 01/28.

Pri tem je izum osnovan na problemu, kako zasnovati k traktorju prigradljiv in s traktorskim pogonom gnan gozdarski vitel z okrovom in v slednjem vgrajenim navijalnim bobnom kot tudi z na omenjenem okrovu vitla okoli navpične osi zasukljivo pritrjenim zgornjim škripčnikom za vodenje in usmerjanjem vlečne vrvi med odvijanjem le-te z omenjenega navijalnega bobna ali navijanjem le-te na omenjen navijalni boben, zagotoviti popolno varovanje vlečne vrvi med vodenjem le-te v območju omenjenega zgornjega škripčnika, tako da bo ne glede na vsakokraten položaj vodila vlečne vrvi glede na okrov v območju zgornjega škripčnika neposredno po ločitvi vrvi od vrvenice preprečeno izstopanje vlečne vrvi iz okrova zgornjega škripčnika in s tem zapletanje vrvi in formiranje zank v območju izven omenjenega okrova, s čimer bi bila med vodenjem vlečne vrvi preko zgornjega škripčnika v vseh možnih smereh med regularnim obratovanjem vitla odpravljena možnost prekomernega upogibanja, zatikanja ali celo lomljenja omenjene vlečne vrvi.The invention is based on the problem of how to design a tractor-mounted, tractor-driven, forest-driven winch with a housing and in the latter a winding drum, as well as with the winch about the vertically pivotally attached upper pulley attached to guide and direct the tow rope on said winch. from said winding drum or winding it onto said winding drum, to ensure complete protection of the tow rope while guiding it in the area of said upper pulley, so that regardless of the respective position of the tow rope guide relative to the housing in the area of the upper immediately after the rope is separated from the rope, the rope is prevented from escaping from the upper boom box, thereby entangling the rope and forming loops in the area outside said boom, thus eliminating the possibility of running the rope over the upper boom in all possible directions during regular operation of the winch. excessive bending, z attaching or even breaking said tow rope.

K traktorju priključljiv in s traktorskim pogonom gnan gozdarski vitel kot tak je opisan npr. v SI 9600339 A2 ali SI22280 oz. DE 20 2007 005538 ali v SI 22281 oz. DE 20 2007 005535, medtem ko je ena izmed znanih rešitev motorno gnanega zgornjega škripčnika tovrstnega vitla opisana v WO 2009/148414. Vitel z zgornjim škripčnikom, ki predstavlja izhodišče pričujočega izuma, je med drugim opisan tudi v SI-P-201700014 oz. PCT/SI2018/000001.A forestry winch driven by a tractor connected to a tractor and driven as such is described e.g. in SI 9600339 A2 or SI22280 respectively. DE 20 2007 005538 or in SI 22281 respectively. DE 20 2007 005535, while one of the well-known solutions for the motor driven upper hoist of this type of winch is described in WO 2009/148414. The upper pulley winch, which is the starting point of the present invention, is also described in SI-P-201700014 or. PCT / SI2018 / 000001.

Tovrsten vitel obsega okrov, ki je preko običajnega tritočkovnega priključnega mehanizma prigradljiv k traktorju ali podobnemu delovnemu stroju. V okrovu je uležajen navijalni boben z na sebi navito vlečno vrvjo. Navijalni boben je vrtljiv skupaj z gredjo, ki je preko reduktorja ob posredovanju alternativno delujočih zavore in sklopke gnana s pomočjo kardanske gredi traktorja ali podobnega delovnega stroja. Na omenjenem okrovu je nadalje na voljo vsaj takoimenovan zgornji škripčnik, ki je namenjen za izvlačenje vrvi z bobna in usmerjanje le-te proti vsakokratnemu bremenu, po izbiri pa tudi spodnji škripčnik, preko katerega se po izbiri vodi vlečno vrv, kadar je potrebno znižati prijemališče sile zaradi vlečne vrvi, lahko pa tudi pomožni vitel, kakršen je opisan v omenjenem SI-P201700014 oz. PCT/SI2018/000001. Med zgornjim škripčnikom in navijalnim bobnom je lahko predviden tudi usmerjevalni sklop, ki je namenjen za usmerjanje vlečne vrvi neposredno pred navijanjem le-te na navijalni boben.Such a winch comprises a housing which can be attached to a tractor or similar machine through a conventional three-point attachment mechanism. There is a winding drum in the housing with a tow rope wound on it. The winding drum is rotated together with a shaft which is driven through a gearbox by means of a PTO shaft of a tractor or similar working machine through an alternatively acting brake and clutch. At least a so-called upper pulley is further provided on said housing for pulling the rope from the drum and directing it to the respective load, and optionally also a lower pulley through which the towing rope is optionally guided when the gripping point is required forces due to the tow rope, but also the auxiliary winch as described in said SI-P201700014 or. PCT / SI2018 / 000001. A guide assembly may also be provided between the upper pulley and the winding drum, which is intended to direct the tow rope immediately before winding it on the winding drum.

Zgornji škripčnik, iz katerega izhaja pričujoči izum, je kot tak podrobneje opisan v slovenskem patentu št. SI 24539 A (prijava št. P-201300375) in tudi v DE 20 2014 105 161.9 Ul, in obsega okrov, ki je okoli vsaj približno vertikalne osi zasukljivo pritrjen na okrovu gozdarskega vitla. Lokacija pritrditve zgornjega škripčnika na okrov vitla je izbrana na razmeroma veliki oddaljenosti od podlage, tako da se vlečna vrv po odvitju z bobna nahaja na zadostni oddaljenosti od podlage, ki omogoča nemoteno delo, pri čemer je po potrebi vlečno vrv možno speljati še preko nižje razporejenega spodnjega škripčnika in s tem prijemališče vlečne sile premakniti bližje podlagi ter s tem vitel in traktor še zlasti med vlečenjem težjih bremen po neugodnem terenu še bolje zavarovati proti prevračanju. Zgornji škripčnik znanega vitla je opremljen z vodilom vlečne vrvi, ki obsega vodilno pušo, ki je razporejena na radialnem odmiku od zunanjega oboda omenjene vrvenice in skozi katero zaradi vodenja vstavljiva vlečna vrv. Omenjena vodilna puša je pričvrščena na dvojici krakov, ki sta razporejena vsak na svoji strani omenjene vrvenice in skupaj z omenjeno vodilno pušo vsaj za določen kot relativno glede na okrov zgornjega škripčnika zasukljiva okoli omenjene horizontalne geometrijske osi, okoli katere je sicer vrtljiva tudi omenjena vrvenica. Kot zasukljivosti omenjenega vodila okoli omenjene horizontalne geometrijske osi znaša vsaj 100° oz. je vsaj tolikšen, da vlečna vrv skozi omenjeno vodilno pušo v smeri proti vsakokratnemu bremenu lahko poteka bodisi poševno navzgor in vstran od podlage ali pa v smeri navzdol vsaj približno pravokotno proti podlagi. Še zlasti kadar je vodilo usmerjeno navzdol proti podlagi se med vodilno pušo in okrovom zgornjega škripčnika vzpostavi razmeroma obsežna vrzel, v območju katere vlečna vrv po izstopu z vrvenice ni z ničemer vodena oz. omejena. Posebej v primerih, ko je vrv bodisi poškodovana, npr. na določenem mestu lomljena, ali pa če je vitel opremljen s pripravo za odvijanje vrvi z bobna, ki vlečno vrv odvija z bobna in jo potiska skozi vodilno pušo, se v praksi lahko zgodi, da vrv po prehodu preko vrvenice zgornjega škripčnika izstopi skozi omenjeno vrzel med okrovom zgornjega škripčnika in vodilno pušo. Zlasti pri daljinsko upravljanih vitlih lahko mine kar nekaj časa, preden uporabnik opazi, da je izstopanje vrvi skozi vodilno pušo zastalo in da namesto skozi vodilno pušo zgornjega škripčnika vlečna vrv izstopa kar skozi omenjeno vrzel. V tem času se izven zgornjega škripčnika lahko nabere že tolikšna dolžina vrvi, da se vrv prične nekontrolirano zapletati ali celo tvoriti zanke. Poseg, s katerim se v takem primeru doseže bodisi napredovanje vrvi skozi vodilno pušo v smeri proti bremenu ali pa vračanje vlečne vrvi preko vrvenice zgornjega škripčnika nazaj proti navij alnemu bobnu jev vsakem primeru neprijeten in zamuden, v določenim primerih pa lahko tudi precej nevaren. Zato je temeljni namen pričujočega izuma vnaprej preprečiti, da bi lahko do tovrstnih problemov sploh prišlo.The upper pulley, from which the present invention originates, is described in more detail in Slovenian patent no. SI 24539 A (Application No. P-201300375) and also in DE 20 2014 105 161.9 Ul, and comprises a housing which is pivotally mounted at least about the vertical axis to the housing of the forestry winch. The location of the attachment of the upper pulley to the winch housing is chosen at a relatively large distance from the base, so that, after unwinding from the drum, the tow rope is at a sufficient distance from the base to allow smooth operation, whereby the tow rope can be routed even further downstream. to move the drawbar closer to the base, thereby better securing the winch and tractor, especially when pulling heavy loads over unfavorable terrain, against rollover. The upper pulley of the known winch is provided with a drawbar guide comprising a guide sleeve disposed at a radial distance from the outer circumference of said drawbar and through which a drawbar is inserted to guide it. Said guide sleeve is attached to two arms, each arranged on its side of said rope, and together with said guide sleeve rotatable about at least relative to the upper pulley housing about said horizontal geometric axis, which is also rotated by said rope. The angle of rotation of said guide about said horizontal geometric axis is at least 100 ° or. is at least such that the tow rope through said guide sleeve in the direction of the respective load can either be inclined upward and away from the base, or downward at least approximately perpendicularly to the base. Especially when the guide is pointing downwards towards the base, a relatively wide gap is created between the guide bushing and the upper pulley housing, in which the tow rope is not guided or exited after leaving the line. limited. Especially in cases where the rope is either damaged, e.g. broken at a certain point, or if the winch is equipped with a device for unwinding a rope from a drum which pulls the rope from the drum and pushes it through the guide sleeve, in practice it may be that the rope exits through the gap of the upper pulley through said gap between the upper pulley housing and the guide bushing. Particularly for remote controlled winches, it may take some time before the user notices that the rope protrusion through the guide sleeve is stalled and that the pulling rope protrudes through the gap instead of through the upper pulley guide sleeve. During this time, the length of the rope can be gathered outside the top pulley so that the rope starts to become uncontrollably tangled or even to form loops. In this case, the operation of either moving the rope through the guide bushing in the direction of the load, or returning the tow rope over the top of the pulley back to the winding drum, in any case, is unpleasant and time consuming, and in some cases quite dangerous. Therefore, the basic purpose of the present invention is to prevent, in advance, any such problems from occurring.

Predmet izuma je gozdarski vitel z izpopolnjenim varovanjem med vodenjem vlečne vrvi v območju zgornjega škripčnika. Tovrsten gozdarski vitel obsega ustrezno tog škatlast okrov, ki je prirejen bodisi za odlaganje na podlago ali za vgradnjo na traktor ali podoben delovni stroj, opremljen s tritočkovnim priključnim mehanizmom in pogonsko gredjo za pogon kmetijske ali gozdarske mehanizacije, tako da je omenjeni vitel s pomočjo omenjenega tritočkovnega mehanizma odstranljivo pritrdljiv na traktor ali podoben delovni stroj. V omenjenem okrovu je skupaj s pripadajočo gredjo uležajen okoli svoje rotacijske osi vrtljiv navijalni boben z na sebi navito vlečno vrvjo, ki je preko prenosnika in kardanskega sklopa gnan s pomočjo omenjene traktorske pogonske gredi in upravljiv s pomočjo alternativno delujočih zavore in sklopke. Poleg tega omenjeni vitel obsega tudi vsaj en zgornji škripčnik, ki je zasukljiv okoli vsaj približno vertikalne geometrijske osi vsaj za vnaprej določen kot in obenem pritrjen na omenjenem okrovu vitla na primerni oddaljenosti od podlage. Po izbiri pa vitel nadalje obsega tudi vsaj en spodnji škripčnik, vsaj eno podporno nogo za podpiranje vitla, kadar le-ta ni priključen k omenjenemu traktorju ali delovnemu stroju oz. ni v uporabi, vsaj en pomožni vitel, na okrovu pritrjeno varovalno mrežo, v notranjosti okrova neposredno ob navijalnem bobnu razporejen usmerjevalni sklop za usmerjanje vlečne vrvi med navijanjem na boben, razen tega pa po izbiri tudi vsaj eno pogonsko sredstvo za odvijanje vlečne vrvi z navijalnega bobna, kadar se le-ta nahaja v prostem teku oz. je prosto vrtljiv. Omenjen zgornji škripčnik obsega okoli omenjene vsaj približno vertikalne geometrijske osi zasukljiv okrov, v katerem je okoli vsaj približno horizontalno razporejene geometrijske osi vrtljivo uležajena vrvenica za vodenje vlečne vrvi v smeri od navijalnega bobna proti vsakokratnemu bremenu ali obratno. Nadalje je omenjen zgornji škripčnik opremljen z vodilom vlečne vrvi, ki obsega vodilno pušo, ki je razporejena na radialnem odmiku od zunanjega oboda omenjene vrvenice in skozi katero je zaradi vodenja vstavljiva vlečna vrv, pri tem pa je vodilna puša pričvrščena na dvojici krakov, ki sta razporejena vsak na svoji strani omenjene vrvenice in skupaj z omenjeno vodilno pušo vsaj za določen kot relativno glede na okrov zgornjega škripčnika zasukljiva okoli omenjene horizontalne geometrijske osi, okoli katere je sicer vrtljiva tudi omenjena vrvenica. Pri tem pa kot zasukljivosti omenjenega vodila okoli omenjene horizontalne geometrijske osi znaša vsaj 100° oz. je vsaj tolikšen, da vlečna vrv skozi omenjeno vodilno pušo v smeri proti vsakokratnemu bremenu lahko poteka bodisi poševno navzgor in vstran od podlage ali pa v smeri navzdol vsaj približno pravokotno proti podlagi.The subject of the invention is a forestry winch with advanced protection while guiding the tow rope in the area of the upper pulley. Such a forestry winch comprises a suitably rigid box-shaped housing adapted for either laying on the ground or mounting on a tractor or similar working machine, equipped with a three-point coupling mechanism and a drive shaft for driving agricultural or forestry machinery, such that said winch is by means of said three-point mechanism removable for attachment to a tractor or similar machine. In said housing, together with the associated shaft, there is a rotatable winding drum mounted on its rotary axis with a coiled tow rope which is driven through the gearbox and the PTO by means of said tractor drive shaft and controlled by alternatively acting brakes and clutches. In addition, said winch also comprises at least one upper pulley rotatable about at least about the vertical geometric axis for at least a predetermined angle and at the same time attached to said winch housing at a reasonable distance from the base. Optionally, the winch further comprises at least one lower pulley, at least one support leg to support the winch when it is not connected to said tractor or working machine or machine. not in use, at least one auxiliary winch, a retaining net attached to the enclosure, a routing assembly arranged directly inside the enclosure adjacent to the winding drum to direct the tow rope during winding to the drum, and optionally at least one propulsion means for unwinding the tow rope from the reel the drum when it is idling or running. is freely rotatable. Said upper pulley comprises a rotatable housing about said at least about the vertical geometric axis, in which about at least about the horizontally spaced geometric axis is a pivotally mounted rope to guide the tow rope in the direction from the winding drum to the respective load or vice versa. Further, said upper pulley is provided with a drawbar guide comprising a guide sleeve disposed at a radial distance from the outer circumference of said drawbar, through which a drawbar is inserted for guidance, the guide sleeve being secured to the two arms which are arranged on each side of said string, and together with said guide sleeve, at least for a certain angle relative to the upper pulley housing, rotate about said horizontal geometric axis, around which said string is rotatable. The angle of rotation of said guide about said horizontal geometric axis is at least 100 ° or. is at least such that the tow rope through said guide sleeve in the direction of the respective load can either be inclined upward and away from the base, or downward at least approximately perpendicularly to the base.

Za tovrsten vitel je po izumu značilno, da je v območju med okrovom zgornjega škripčnika, namreč v območju v bližini vrvenice in preko slednje potekajoče vlečne vrvi, in vodilom vlečne vrvi nameščeno varovalo vlečne vrvi, ki je po eni strani pritrjeno na omenjen okrov in po drugi strani na omenjeno vodilo, tako da vsaj v pretežni meri zastira v obodni smeri vrvenice potekajočo vrzel med okrovom zgornjega škripčnika in vodilom vlečne vrvi na zgornjem škripčniku.According to the invention, such a winch is characterized by the fact that a guard of the tow rope is mounted in the area between the top of the upper pulley, namely in the area near the pulley and through the latter running rope, and the rope guide is mounted on one side to said casing and according to the invention. on the other side to said guide, so that at least substantially the gaps in the circumferential direction of the cord are closed by a running gap between the upper pulley housing and the tow cable guide on the upper pulley.

Omenjeno varovalo sestoji iz prvega varovalnega sklopa, ki je po eni strani členkasto povezan z okrovom zgornjega škripčnika, in drugega varovalnega sklopa, ki je po eni strani členkasto povezan z vodilom vlečne vrvi na zgornjem škripčniku, po drugi strani pa sta omenjena prvi in drugi varovalni sklop tudi členkasto povezana drug z drugim.Said guard comprises a first guard assembly which is articulated on the one hand with the upper pulley housing, and a second protection assembly which is articulated on the one hand with the guide of the tow rope on the upper pulley, and on the other hand, said first and second protection means. the set also articulated to one another.

Pri prednostni izvedbi izuma je prvi varovalni sklop enovito zasnovan in obsega med seboj vzporedno razmaknjena kraka, ki sta vsak na svojem prostem koncu s pomočjo somika vsak zase členkasto povezana z okrovom zgornjega škripčnika in obenem med seboj togo povezana preko osrednjega varovalnega dela, ki sega preko obodnega območja vrvenice. Prav tako je tudi drugi varovalni sklop enovito zasnovan in obsega med seboj vzporedno razmaknjena kraka, ki sta vsak na svojem prostem koncu s pomočjo somika vsak zase členkasto povezana z vodilom vlečne vrvi na zgornjem škripčniku in obenem med seboj togo povezana preko osrednjega varovalnega dela, ki sega preko obodnega območja vrvenice. Razen tega sta prvi in drugi varovalni sklop v območju svojih osrednjih varovalnih delov opremljena s sredstvi za zagotavljanje členkaste medsebojne povezave med prvim in drugim varovalnim delom.In a preferred embodiment of the invention, the first guard assembly is uniquely designed and comprises spaced arms in parallel, which are each articulated at their free end connected to the housing of the upper pulley and rigidly connected to one another via a central guard portion extending over circumferential area of the cord. Likewise, the second guard assembly is uniquely designed and comprises spaced arms which are parallel to each other, each at its free end, each articulately linked to the guide of the tow rope on the upper pulley and rigidly connected to one another via a central guard member. extends beyond the circumferential area of the cord. In addition, the first and second guard assemblies in the area of their central guard members are provided with means for providing articulate interconnection between the first and second guard members.

Pri tem sta omenjen prvi varovalni del in drugi varovalni del varovala vlečne vrvi tako oblikovana, da v prvem skrajnem položaju vodila glede na okrov zgornjega škripčnika, v katerem vlečna vrv skozi vodilno pušo vodila poteka v smeri navzdol proti podlagi, vsak izmed med seboj členkasto povezanih varovalnih delov varovala poteka vsaj približno v obodni smeri vrvenice zgornjega škripčnika in na primernem odmiku od omenjene vrvenice, in sicer preko vsaj pretežnega dela območja med vodilom vlečne vrvi in okrovom zgornjega škripčnika, medtem ko sta v drugem skrajnem položaju vodila vrvi, v katerem vlečna vrv poteka poševno navzgor in vstran od podlage, omenjena varovalna dela glede na vrvenico zasukana vsaj približno radialno navzven in pri tem še vedno tako drug z drugim kot tudi vsak zase z okrovom oz. vodilom členkasto povezana.The aforementioned first guard portion and second guard portion of the tow rope guard are configured such that in the first extreme position of the guide relative to the upper pulley housing, in which the tow rope passes downwardly towards the base through each guide bushing, each of them articulated together. the securing parts of the guard extend at least approximately in the circumferential direction of the upper pulley rope and at a suitable distance from said rope, through at least a predominant portion of the area between the rope guide and the upper hopper housing, while at the other extreme position of the rope guide in which the rope is drawn. The said protective work is rotated at least approximately radially outwards with respect to the rope, still at the same time with each other as well as with each other by means of a casing or. guides articulated.

Izum se nanaša tudi na sam škripčnik gozdarskega vitla, pri čemer je omenjeni škripčnik pritrdljiv na okrov gozdarskega vitla na primerni oddaljenosti od podlage in potem zasukljiv okoli vsaj približno vertikalne geometrijske osi vsaj za vnaprej določen kot, Omenjeni škripčnik obsega okoli omenjene vsaj približno vertikalne geometrijske osi zasukljiv okrov, v katerem je okoli vsaj približno horizontalno razporejene geometrijske osi vrtljivo uležajena vrvenica za vodenje vlečne vrvi v smeri od navijalnega bobna proti vsakokratnemu bremenu ali obratno. Razen tega je škripčnik opremljen z vodilom vlečne vrvi, omenjeno vodilo pa obsega vodilno pušo, ki je razporejena na radialnem odmiku od zunanjega oboda omenjene vrvenice in skozi katero je zaradi vodenja vstavljiva vlečna vrv, pri tem pa je vodilna puša pričvrščena na dvojici krakov, ki sta razporejena vsak na svoji strani omenjene vrvenice in skupaj z omenjeno vodilno pušo vsaj za določen kot relativno glede na okrov zgornjega škripčnika zasukljiva okoli omenjene horizontalne geometrijske osi, okoli katere je sicer vrtljiva tudi omenjena vrvenica, Kot zasukljivosti omenjenega vodila okoli omenjene horizontalne geometrijske osi znaša vsaj 100° oz. je vsaj tolikšen, da vlečna vrv skozi omenjeno vodilno pušo v smeri proti vsakokratnemu bremenu lahko poteka bodisi poševno navzgor in vstran od podlage ali pa v smeri navzdol vsaj približno pravokotno proti podlagi. Za tovrsten škripčnik je po izumu značilno, daje v območju med okrovom škripčnika, namreč v območju v bližini vrvenice in preko slednje potekajoče vlečne vrvi, in vodilom vlečne vrvi nameščeno varovalo vlečne vrvi, ki je po eni strani pritrjeno na omenjen okrov in po drugi strani na omenjeno vodilo, tako da vsaj v pretežni meri zastira v obodni smeri vrvenice potekajočo vrzel med okrovom zgornjega škripčnika in vodilom vlečne vrvi na zgornjem škripčniku.The invention also relates to a hoist winch itself, said hoist being attached to the hoist winch housing at a suitable distance from the base and then rotating about at least about a vertical geometric axis to at least a predetermined angle, said hoist comprises about said at least about a vertical geometric axis a rotatable housing in which there is a pivotally mounted rope about at least approximately horizontally spaced geometric axes for guiding the tow rope in the direction from the winding drum to the respective load or vice versa. In addition, the pulley is provided with a tow rope guide, said guide comprising a guide sleeve disposed at a radial distance from the outer circumference of said drawbar, through which a drawbar is inserted to guide the guide sleeve, which is secured to a pair of arms which are each arranged on their side of said rope and together with said guide sleeve rotatable about at least a certain angle relative to the upper pulley housing about said horizontal geometric axis about which the said rope is rotatable, said rotation angle of said guide about said horizontal geometric axis is at least 100 ° or. is at least such that the tow rope through said guide sleeve in the direction of the respective load can either be inclined upward and away from the base, or downward at least approximately perpendicularly to the base. According to the invention, this type of pulley is characterized by the fact that in the area between the pulley housing, namely in the area adjacent to the rope and through the latter running rope, and a rope guide, a rope guard is mounted, which is fixed on one side to said housing and on the other. to said guide, so that at least substantially the gaps in the circumferential direction of the lane are closed by a running gap between the upper pulley housing and the upper lug guide.

Izum bo v nadaljevanju podrobneje obrazložen s primerom izvedbe, ki je ponazorjen na priloženi skici, kjer kažejoThe invention will now be explained in more detail by way of an exemplary embodiment illustrated in the accompanying drawing showing

Sl. 1 pogledu od strani ponazorjen gozdarski vitel iz stanja tehnike;FIG. 1 is a side view of a state-of-the-art forestry winch;

Sl. 2 shematično ponazorjene vitalne dele gozdarskega vitla po Sl. 1, preko katerih poteka vlečna vrv;FIG. 2 schematically illustrates vital parts of a winch according to FIG. 1 through which the tow rope is passed;

Sl. 3 posebej v izometriji ponazorjen zgornji škripčnik vitla po Sl. 1;FIG. 3 is a particularly illustrated in isometric view of the upper winch pulley according to FIG. 1;

Sl. 4 v izometriji ponazorjen po izumu izpopolnjen zgornji škripčnik gozdarskega vitla;FIG. 4 is a top view of the forestry winch illustrated in the isometric view of the invention;

Sl. 5 prav tako v izometriji, vendar z nasprotne strani ponazorjen škripčnik po Sl.FIG. 5 is also in isometric view, but on the opposite side the illustrated pulley according to FIG.

4, pri čemer se vodilo in varovalo vrvi nahajata v prvem končnem položaju;4, wherein the rope guide and guard are in the first end position;

Sl. 6 prav tako v izometriji, vendar z nasprotne strani ponazorjen škripčnik po Sl. 4, pri čemer pa se vodilo in varovalo vrvi nahajata v drugem končnem položaju.FIG. 6 is also in isometric view, but on the opposite side the illustrated pulley according to FIG. 4, with the guide and the rope guard being in the second end position.

Gozdarski vitel 1 sam kot tak je načeloma znan in je zaradi boljše razumljivosti ponazorjen na Sl. 1. Tovrsten vitel 1 obsega ustrezno tog škatlast okrov 11, kije prirejen bodisi za odlaganje na podlago ali za vgradnjo na traktor ali podoben delovni stroj, opremljen s tritočkovnim priključnim mehanizmom in pogonsko gredjo za pogon kmetijske ali gozdarske mehanizacije. Temu ustrezno je omenjeni vitel 1 s pomočjo omenjenega tritočkovnega mehanizma odstranljivo pritrdljiv na traktor ali podoben delovni stroj.The forest winch 1 as such is known in principle and is illustrated in FIG. 1. Such a winch 1 comprises a suitably rigid box-like housing 11, adapted either for laying on the ground or for mounting on a tractor or similar working machine, equipped with a three-point coupling mechanism and a drive shaft for driving agricultural or forestry machinery. Accordingly, said winch 1 is removably fastened to a tractor or similar work machine by means of said three-point mechanism.

V omenjenem okrovu 11 vitla 1 je skupaj s pripadajočo gredjo uležajen okoli svoje rotacijske osi 120 vrtljiv navijalni boben 12 z na sebi navito vlečno vrvjo 10, kije preko prenosnika in kardanskega sklopa gnan s pomočjo omenjene traktorske pogonske gredi in upravljiv s pomočjo alternativno delujočih zavore in sklopke.In said housing 11 of the winch 1, together with the associated shaft, there is a rotatable winding drum 12 with a coiled tow rope 10 mounted on its rotary axis 120, which is driven through the gearbox and the PTO by means of said tractor drive shaft and is operable by means of an alternatively acting brake and switches.

Razen tega omenjeni vitel 1 obsega tudi vsaj en zgornji škripčnik 2, ki je zasukljiv okoli vsaj približno vertikalne geometrijske osi 20' vsaj za vnaprej določen kot in obenem pritrjen na omenjenem okrovu 11 vitla 1, in sicer na primerni oddaljenosti od podlage, tako da je vlečna vrv med zgornjim škripčnikom 2 in vsakokratnim bremenom po možnosti vsaj toliko odmaknjena od podlage, da vrv med vlečenjem bremena ne drsi po podlagi ali se zatika ob predmete na podlagi.In addition, said winch 1 also comprises at least one upper pulley 2 which rotates about at least about the vertical geometric axis 20 'at least for a predetermined angle and at the same time is fastened to said casing 11 of the winch 1 at a suitable distance from the base so that the tow rope between the upper hoist 2 and the load in each case, preferably at least as far away from the base as to prevent the rope from sliding on the ground or being stuck to objects on the ground.

Po izbiri pa vitel 1 obsega tudi vsaj en spodnji škripčnik 18, preko katerega je možno po izbiri speljati vlečno vrv 10, s čimer se prijemališče vlečne sile premakne nižje proti podlagi, kar je smiselno zlasti pri vlečenju težjih bremen v takih okoliščinah, ki bi lahko ogrozile stabilnost traktorja z vitlom.Optionally, winch 1 also comprises at least one lower pulley 18 through which it is possible to guide the draw rope 10 optionally, thereby moving the drawbar gripper lower towards the base, which makes sense especially when hauling heavier loads in such circumstances that could endanger the stability of the winch tractor.

Nadalje je gozdarski vitel 1 običajno opremljen vsaj eno podporno nogo 13 za podpiranje vitla 1, kadar le-ta ni priključen k omenjenemu traktorju ali delovnemu stroju oz. ni v uporabi. Vitel 1 je nadalje lahko opremljen tudi s pomožnim vitlom 14, kije predviden za vlečenje prostega konca vlečne vrvi 10. Še nadalje pa vitel 1, ki je v prikazanem primeru opremljen tudi z varovalno mrežo (15), ki je pritrjena na okrovu 11, obsega v notranjosti okrova 11 neposredno ob navijalnem bobnu 12 razporejen usmerjevalni sklop 16 za usmerjanje vlečne vrvi 10 med navijanjem na boben 12. Vitel 1 nadalje lahko obsega tudi druga pogonska, vodilna in pomožna sredstva, kot npr. pogonsko sredstvo za odvijanje vlečne vrvi 10 z navijalnega bobna 12, kadar se le-ta nahaja v prostem teku oz. je prosto vrtljiv.Further, the forest winch 1 is typically equipped with at least one support leg 13 to support the winch 1 when it is not connected to said tractor or working machine or. not in use. The winch 1 may further be provided with an auxiliary winch 14, which is intended to pull the free end of the tow rope 10. Further, the winch 1, which in the present case is also provided with a safety net (15) attached to the housing 11, comprises In addition, a routing assembly 16 is arranged inside the housing 11 directly adjacent to the winding drum 12 to direct the tow rope 10 during winding onto the drum 12. The winch 1 may further comprise other propulsion, guiding and auxiliary means, such as e.g. a propulsive means for unwinding the tow rope 10 from the winding drum 12 when it is idling or running. is freely rotatable.

Zgornji škripčnik 2 gozdarskega vitla 1 obsega okoli omenjene vsaj približno vertikalne geometrijske osi 20' zasukljiv okrov 21, v katerem je okoli vsaj približno horizontalno razporejene geometrijske osi 20 vrtljivo uležajena vrvenica za vodenje vlečne vrvi 10 v smeri od navijalnega bobna 12 proti vsakokratnemu bremenu ali obratno. Nadalje je omenjen zgornji škripčnik 2 opremljen z vodilom vlečne vrvi 10, ki obsega vodilno pušo 231, ki je razporejena na radialnem odmiku od zunanjega oboda omenjene vrvenice 22 in skozi katero je zaradi vodenja vstavljiva vlečna vrv 10. Omenjena vodilna puša 231 je pričvrščena na dvojici krakov 232, 233, ki sta razporejena vsak na svoji strani omenjene vrvenice 22 in skupaj z omenjeno vodilno pušo 231 vsaj za določen kot relativno glede na okrov 21 zgornjega škripčnika 2 zasukljiva okoli omenjene horizontalne geometrijske osi 20, okoli katere je sicer vrtljiva tudi omenjena vrvenica 22. Kot zasukljivosti omenjenega vodila 23 okoli omenjene horizontalne geometrijske osi 20 znaša vsaj 100° oz. je vsaj tolikšen, da vlečna vrv 10 skozi omenjeno vodilno pušo 231 v smeri proti vsakokratnemu bremenu lahko poteka bodisi poševno navzgor in vstran od podlage ali pa v smeri navzdol vsaj približno pravokotno proti podlagi.The upper hoist 2 of the winch winch 1 comprises a rotatable housing 21 about said at least about the vertical geometric axis 20 'in which there is a rotatably mounted rope about guiding at least about the horizontally arranged geometric axis 20 in the direction from the winding drum 12 towards each load or vice versa. . Furthermore, said upper pulley 2 is provided with a guide rope 10, comprising a guide sleeve 231 disposed at a radial distance from the outer circumference of said cable 22 and through which a draw rope 10 is inserted to guide said guide sleeve 231. arms 232, 233, each arranged on its side of said rope 22, and together with said guide sleeve 231, at least for a certain angle relative to the housing 21 of the upper pulley 2, rotate about said horizontal geometric axis 20, around which the said rope is also rotatable. 22. The rotation angle of said guide 23 about said horizontal geometric axis 20 is at least 100 ° or. is at least such that the tow rope 10 through said guide sleeve 231 in the direction of the respective load can either be inclined upward and away from the base, or downward at least approximately perpendicularly to the base.

Z namenom rešitve uvodoma zastavljenega tehničnega problema je v območju med okrovom 21 zgornjega škripčnika 2, namreč v območju v bližini vrvenice 22 in preko slednje potekajoče vlečne vrvi 10, in vodilom 23 vlečne vrvi 10 nameščeno varovalo 3 vlečne vrvi 10. Omenjeno varovalo 3 je po eni strani pritrjeno na omenjen okrov 21 in po drugi strani na omenjeno vodilo 23, tako da varovalo 3 vsaj v pretežni meri zastira v obodni smeri vrvenice 22 potekajočo vrzel med okrovom 21 zgornjega škripčnika 2 in vodilom 23 vlečne vrvi 10 na zgornjem škripčniku 2.In order to solve the technical problem of the foregoing, a guard 3 of the tow rope 10 is mounted in the area between the casing 21 of the upper pulley 2, namely in the area near the drawbar 22 and over the latter running rope 10, and the guide 23 of the draw rope 10. on one side attached to said housing 21 and, on the other, to said bus 23, such that the guard 3 at least substantially closes the running gap between the housing 21 of the upper pulley 2 and the guide 23 of the draw rope 10 on the upper pulley 2 in the circumferential direction.

Omenjeno varovalo 3 sestoji iz prvega varovalnega sklopa 31, ki je po eni strani členkasto povezan z okrovom 21 zgornjega škripčnika 2, in drugega varovalnega sklopa 32, ki je po eni strani členkasto povezan z vodilom 23 vlečne vrvi 10 na zgornjem škripčniku 2, po drugi strani pa sta omenjena prvi in drugi varovalni sklop 31,32 tudi členkasto povezana drug z drugim.Said guard 3 consists of a first guard assembly 31 which, on the one hand, is articulated to the upper body of the upper pulley 2, and a second safety device 32, which is articulated to the bushing guide 23 of the upper pulley 2, on the other. on the other hand, the first and second guard assembly 31,32 are also articulated with one another.

V izvedbi po Sl. 4 - 6 je prvi varovalni sklop 31 varovala 3 enovito zasnovan in obsega med seboj vzporedno razmaknjena kraka 311, 312, ki sta vsak na svojem prostem koncu 31Γ, 312' s pomočjo somika 310 vsak zase členkasto povezana z okrovom 21 zgornjega škripčnika 2 in obenem med seboj togo povezana preko osrednjega varovalnega dela 313, ki sega preko obodnega območja vrvenice 22. Povsem analogno je tudi drugi varovalni sklop 32 enovito zasnovan in obsega med seboj vzporedno razmaknjena kraka 321, 322, ki sta vsak na svojem prostem koncu 32 Γ, 322' s pomočjo somika 320 vsak zase členkasto povezana z vodilom 23 vlečne vrvi 10 na zgornjem škripčniku 2 in obenem med seboj togo povezana preko osrednjega varovalnega dela 323, ki sega preko obodnega območja vrvenice 22. Prvi in drugi varovalni sklop 31, 32 sta v območju svojih osrednjih varovalnih delov 313, 323 opremljena s sredstvi 314, 324 za zagotavljanje členkaste medsebojne povezave med prvim in drugim varovalnim delom 31, 32, v prikazanem primeru z ustreznimi ušesi in skoznje potekajočim somikom. Pri tem sta omenjen prvi varovalni del 31 in drugi varovalni del 32 varovala 3 vlečne vrvi 10 tako oblikovana, da v prvem skrajnem položaju vodila 23 glede na okrov 21 zgornjega škripčnika 2, v katerem vlečna vrv 10 skozi vodilno pušo 231 vodila 23 poteka v smeri navzdol proti podlagi, vsak izmed členkasto med seboj povezanih varovalnih delov 31,32 varovala 3 poteka vsaj približno v obodni smeri vrvenice 22 zgornjega škripčnika 2 in na primernem odmiku od omenjene vrvenice 22, in sicer preko vsaj pretežnega dela območja med vodilom 23 vlečne vrvi 10 in okrovom 21 zgornjega škripčnika 2, medtem ko sta v drugem skrajnem položaju vodila 23 vrvi 10, v katerem vlečna vrv 10 poteka poševno navzgor in vstran od podlage, omenjena varovalna dela 31, 32 glede na vrvenico 22 zasukana vsaj približno radialno navzven in pri tem še vedno tako drug z drugim kot tudi vsak zase z okrovom 21 oz. vodilom 23 členkasto povezana.In the embodiment of FIG. 4 to 6, the first guard assembly 31 of guard 3 is uniquely designed and comprises spaced arms 311, 312 in parallel, each connected at their free end 31Γ, 312 ′ to a housing 21 of the upper pulley 2 at the same time by means of a socket 310. interconnected rigidly through a central guard portion 313 extending beyond the circumferential region of the string 22. Quite analogously, the second guard assembly 32 is uniformly designed and comprises spaced arms 321, 322 in parallel, each 32 Γ, 322 at their free end. 'through a somber 320, each is articulated in a joint with the guide 23 of the draw rope 10 on the upper pulley 2 and rigidly connected to one another via a central guard portion 323 extending beyond the circumferential region of the string 22. The first and second guard assembly 31, 32 are in the of its central protection parts 313, 323 provided with means 314, 324 for providing articulated interconnection between the first and second protection parts 31, 32, in the illustrations with the appropriate ears and the catfish running through it. Said first guard portion 31 and second guard portion 32 of guard 3 of the tow rope 10 are shaped so that in the first extreme position of the guide 23 relative to the housing 21 of the upper hoist 2, in which the pulling rope 10 passes through the guide sleeve 231 of guide 23 in the direction downwards towards the base, each of the articulated interconnected guard members 31,32 of guard 3 extends at least approximately in the circumferential direction of the top 22 of the pulley 2 and at a suitable distance from said line 22, through at least a predominant portion of the area between the guide 23 of the drawbar 10 and to the housing 21 of the upper pulley 2, while in the second extreme position of the guide 23 of the rope 10, in which the tow rope 10 extends obliquely up and away from the base, said guarding parts 31, 32 with respect to the rope 22 are rotated at least about radially outwards, still with each other as well as with each other with a 21 oz. guides 23 articulated.

Temu ustrezno je potem še zlasti v situaciji, ko se vodilni sklop 23 nahaja v končnem položaju po Sl. 3 in 6 in ko je torej vrzel med okrovom 21 in vodilom 23 največja, vlečna vrv 10 zavarovana proti uhajanju navzven iz območja škripčnika 2, obenem pa se med obratovanjem varovalo 3 lahko vseskozi prilagaja spremembam položaja vodilnega sklopa 23 glede na okrov 21 škripčnika 2.Accordingly, it is especially appropriate in the situation when the guide assembly 23 is in the end position according to FIG. 3 and 6, and when the gap between the housing 21 and the guide 23 is therefore the largest, the tow rope 10 is secured against leakage outside the area of the hoist 2, and at the same time, during operation, the guard 3 may be adapted at all times to the changes of the position of the guide assembly 23 relative to the hopper 21.

Claims

PATENT APPLICATIONS

A forest winch (1) with advanced protection while guiding the tow rope (10) in the area of the upper pulley (2), said forest winch (1) comprising a suitably rigid box enclosure (11) adapted for either laying on the ground or to be mounted on a tractor or similar working machine equipped with a three-point coupling mechanism and a drive shaft for driving agricultural or forestry machinery, such that said winch (1) is removably fastened to the tractor or similar work machine by means of said three-point mechanism; in said housing (11), together with the associated shaft, there is a rotary winding drum (12) mounted on its rotary axis (120) with a coiled tow rope (10) which is driven through the transmission and the PTO by means of said tractor drive shaft, and controllable by means of alternately acting brakes and clutches, in addition, said winch (1) also comprises at least one upper pulley (2) which rotates about at least about the vertical geometric axis (20 ') at least for a predetermined angle and at the same time fastened to said winch (1) housing (1) at a suitable distance from the base, and optionally the winch (1) also comprises at least one lower pulley (18), at least one support leg (13) for supporting the winch (1) when it is not connected to said tractor or working machine or not in use, at least one auxiliary winch (14), a safety net (15) attached to the housing (11), a routing assembly (16) arranged to direct the traction rope (10) arranged inside the housing (11) directly next to the winding drum (12) during winding on the drum (12), and optionally at least one drive means for unwinding the tow rope (10) from the winding drum (12) when it is idling or running. it is freely rotatable, wherein said upper pulley (2) comprises a rotatable housing (21) about said at least about the vertical geometric axis (20 '), in which a rope (22) is rotatably spaced about at least about the horizontally arranged geometric axis (20). guiding the tow rope (10) in the direction from the winding drum (12) to the respective load, or vice versa, wherein said upper pulley (2) is further provided with a guide (23) of the tow rope (10) comprising a guide sleeve (231) , which is disposed at a radial distance from the outer circumference of said rope (22) and through which a guide rope (10) is inserted for guidance, the guide sleeve (231) being attached to the two arms (232, 233) arranged each on its side of said string (22), and together with said guide sleeve (231), at least for a certain angle relative to the housing (21) of the upper pulley (2), rotate about said horizontal geometric axis (20) about which there is a garden Also mentioned is a string (22), said angle of rotation of said guide (23) about said horizontal geometric axis (20) being at least 100 ° or. is at least such that the tow rope (10) through said guide sleeve (231) in the direction of the respective load can be either obliquely upward and away from the base, or downward at least approximately orthogonal to the base, characterized in that between the housing (21) of the upper pulley (2), namely in the area near the rope (22) and through the latter running rope (10), and a guide (23) of the rope (10) a guard (3) of the rope (10) is mounted mounted on one side to said housing (21) and on the other to said guide (23) so that at least substantially the gaps between the housing (21) of the upper pulley (2) are closed in the circumferential direction of the rope (22) and guide (23) of the tow rope (10) on the upper pulley (2).

Forest winch according to claim 1, characterized in that said guard (3) consists of a first guard assembly (31) which is articulated on the one hand with the upper pulley housing (21) and the second guard assembly (2). 32), which is articulated on the one hand with the guide (23) of the tow rope (10) on the upper pulley (2), and on the other hand, said first and second securing assembly (31, 32) are also articulated with each other.

Forest winch according to claim 1 or 2, characterized in that the first guard assembly (31) is uniformly designed and comprises spaced arms (311, 312) in parallel, each at its free end (31Γ, 312 '). by means of a catfish (310), each is articulated in a joint with the housing (21) of the upper pulley (2) and rigidly connected to one another via a central guard portion (313) extending beyond the circumferential region of the string (22), the guard assembly (32) is uniformly designed and comprises spaced arms (321) in parallel,

322), which are each articulated at their free end (32 ', 322') by means of a catfish (320) connected to each other by a guide (23) of the tow rope (10) on the upper pulley (2) and at the same time rigidly connected to each other via the central guard portion (323) extending beyond the circumferential region of the string (22) and the first and second guard assembly (31, 32) being in the region of its central guard members (313,

323) provided with means (314, 324) to provide a articulated interconnection between the first and second protection portion (31, 32).

Forestry winch according to any one of claims 1-3, characterized in that said first guard member (31) and a second guard member (32) of the guard (3) of the tow rope (10) are so shaped that in the first extreme position of the guide (23) with respect to the housing (21) of the upper pulley (2), in which the pulling rope (10) passes downwardly towards the base through each guide bushing (231) of the guide (23), each of the articulated interconnected guarding parts (31, 32) of the guard (3) extends at least approximately in the circumferential direction of the top (22) of the upper pulley (2) and at a suitable distance from said cord (22), through at least a predominant portion of the area between the guide (23) of the tow rope (10) and the upper pulley (2) housing (21), while in the second extreme position of the guide (23) of the rope (10), in which the tow rope (10) extends obliquely upwards and away from the base, said protective parts (31, 32) are rotated at least approximately radially outward to the rope (22), still with each other as well as all to itself with a cover (21) or. guides (23) articulated.

5. Forestry winch pulley (2), said pulley (2) being attached to the housing (11) of the winch winch (1) at a suitable distance from the base and then rotating about at least about the vertical geometric axis (20 ') for a predetermined angle, and wherein said pulley (2) comprises a rotatable housing (21) about said at least about the vertical geometric axis (20 '), in which a rope (22) is pivoted about at least about the horizontally spaced geometric axis (20) for guiding the tow rope (10) in the direction from the winding drum (12) to the respective load, or vice versa, except that the pulley (2) is provided with a guide (23) of the tow rope (10) comprising a guide sleeve (231) which is disposed at a radial distance from the outer circumference of said rope (22) and through which a guide rope (10) is inserted for guiding purposes, the guide sleeve (231) being attached to two arms (232, 233) arranged at each to your page mentioned ropes (22) and together with said guide sleeve (231) at least for a certain angle relative to the housing (21) of the upper pulley (2) rotate about said horizontal geometric axis (20), around which the said rope (22) is also rotatable. , wherein said rotation angle of said guide (23) about said horizontal geometric axis (20) is at least 100 ° or. is at least such that the tow rope (10) through said guide sleeve (231) in the direction of the respective load can be either obliquely upward and away from the base, or downward at least approximately orthogonal to the base, characterized in that between the housing (21) of the pulley (2), namely in the area near the rope (22) and through the latter running rope (10), and a guard (23) of the rope (10) a guard (3) of the rope (10) is mounted, which is secured to said housing (21) on the one hand and to said guide (23) on the other, so that at least substantially the circumferential gap between the housing (21) of the upper pulley (2) is closed in the circumferential direction of the rope (22), and guide (23) of the tow rope (10) on the upper pulley (2).

Forestry winch pulley (2) according to claim 5, characterized in that said guard (3) consists of a first guard assembly (31) which, on the one hand, is articulated to the housing (21) of the upper pulley (2). , and the second guard assembly (32), which is articulated on the one hand with the guide (23) of the tow rope (10) on the upper pulley (2), and on the other hand, the first and second guard assembly (31, 32) are also mentioned articulated with one another.

Forestry winch pulley (2) according to claim 5 or 6, characterized in that the first protection assembly (31) is uniformly designed and comprises spaced apart arms (311, 312) in parallel, each of which is open to each other. end (31Γ, 312 ') by means of a catfish (310), each articulated interconnected with the housing (21) of the upper pulley (2) and at the same time rigidly connected to one another via a central guard portion (313) extending beyond the circumferential region of the rope (22) , and thus, the second guard assembly (32) is uniformly designed and comprises spaced arms (321, 322) in parallel, which are each articulated on their free end (321 ', 322') by means of a snap (320). connected to the guide (23) of the draw rope (10) on the upper pulley (2) and at the same time rigidly connected to one another via a central guard (323) extending beyond the circumferential region of the drawstring (22) and the first and second a guard assembly (31, 32) provided with means (314, 3) in the region of its central guard parts (313, 323) 24) to provide an articulate interconnection between the first and the second protective part (31, 32).

Forestry winch pulley (2) according to any one of claims 5-7, characterized in that said first guard member (31) and second guard member (32) of the guard (3) of the tow rope (10) are thus formed , that in the first extreme position of the guide (23) with respect to the housing (21) of the upper pulley (2), in which the tow rope (10) through the guide sleeve (231) of the guide (23) extends downwards towards the base, each of the articulated the interconnected guard parts (31, 32) of the guard (3) extend at least approximately in the circumferential direction of the top pulley (22) and at a suitable distance from said string (22) through at least a predominant portion of the area between the guide (23) ) of the tow rope (10) and the upper pulley housing (21) (2), while in the second extreme position the guide (23) of the rope (10), in which the tow rope (10) extends obliquely up and away from the base, of the part (31, 32) with respect to the rope (22) rotated at least approximately radially outwards, while still being otherwise with the other, as well as each with a housing (21) or. guides (23) articulated.