FI91588C

FI91588C - Harvest Purity

Info

Publication number: FI91588C
Application number: FI921536A
Authority: FI
Inventors: Pentti Lastunen
Original assignee: Lastusen Konepaja Oy
Priority date: 1992-04-07
Filing date: 1992-04-07
Publication date: 1994-07-25
Also published as: AU3892093A; FI921536A0; WO1993019909A1; FI921536A; FI91588B

Description

9158891588

Harvesteriyksikko - HarvesterenhetHarvester unit - Harvesterenhet

Keksinto koskee harvesteriyksikkda, joka kåsittaa runko-osan, 5 runko-osassa olevan kiintean vetorullan tai vastaavat, siihen nahden ulos- ja sisaånpain siirtyvat vetorullat tai vastaavat puunrungon liikuttamiseksi sen pituussuunnassa vetorullien va-lisså ja vålityksellå, kun vetorullia pyoritetaan seka. tarvit-tavat puun tydstdelimet.The invention relates to a harvester unit comprising a body part, a fixed traction roller in the body part 5 or similar traction rollers or the like displacing the outward and inward pressures thereof, for moving the tree trunk in its longitudinal direction between and through the traction rollers when the traction rollers are rotated. necessary wood fillers.

1010

Tunnetuissa harvestereissa on runko-osassa yksi tai kaksi kiinteSS vetorullaa tai vastaava hihna- tai ketjuveto. TarnSn kiinteSn vetorullan kohdalla on runko-osassa puunrunkoon nåh-den poikittainen tanko, jonka paihin on nivelilla kiinnitetty 15 kSSntdvarret ja niiden paissa olevat siirtyvat vetorullat.Known harvesters have one or two fixed drive rollers or a similar belt or chain drive in the body part. In the case of the TarnS fixed traction roller, the frame part has a rod transverse to the tree trunk, the seats of which are articulated with 15 kSSntdar arms and movable traction rollers at their ends.

Tyypillisesti nSiden siirtyvien vetorullien kaantovarret ovat pituudeltaan samaa suuruusluokkaa kuin poikittaisen tangon pituuden puolikas ja naita varsia kSannetaan yleensa hydrauli-silla koneistoilla kiinteåa vetorullaa kohti tai siitM pois-20 pain. Kun nivelien akselit ovat likipitaen puunrungon suuntai-sia, kykenevat siirtyvat vetorullat puristamaan eri lapimit-taista puunrunkoa, kun ne kååntyvåt hydraulisten kåyttolait-teiden vaikutuksesta kiinteaS vetorullaa kohti. Kun puunrun-got, joita on tarkoitus kåsitella, eivat ole kovin paksuja 25 eivatka kovin ohuita, toimii edella kuvattu jarjestely tyydyt-tavasti. Haluttaessa kasitella erittain paksuja puunrunkoja, ts. puunrunkoja, joiden paksuus on yli 50 cm, joudutaan edella kuvatulla rakenteella vaikeuksiin. Talloin on nimittain seka poikittaisen tangon ettå varsien pituutta huomattavasti lisat-30 tåvå, jolloin laitteen leveys kasvaa niin suureksi ja paino niin suureksi, etta sen tyontaminen esimerkiksi puiden valistå haluttuun puuhun kiinni kay monessa tapauksessa mahdottomaksi. Myos varsien pituuden lishMminen lisaa naiden vipuvarsien mo-menttivaikutuksen vuoksi huomattavasti voiman tarvetta, mika 35 edelleen suurentaa laitetta. TSsth syysta ei ole tahan mennes-sa pystytty rakentamaan kåytannollista harvesteria puunrun-goille, joiden halkaisija olisi suurempi kuin noin 50 cm.Typically, the support arms of nSide movable traction rollers are of the same order of magnitude as half the length of the transverse rod, and these arms are generally provided by hydraulic mechanisms per fixed traction roller or from there -20 p.m. When the axes of the joints are approximately parallel to the direction of the tree trunk, the displaceable traction rollers are able to compress the trunk of a different length of wood when they pivot the fixed traction roller under the action of hydraulic drives. When the wood trunks to be treated are not very thick or very thin, the arrangement described above works satisfactorily. If it is desired to handle very thick tree trunks, i.e. tree trunks with a thickness of more than 50 cm, the structure described above has difficulties. In that case, both the transverse rod and the length of the stems are considerably increased, so that the width of the device increases and the weight so large that it is in many cases impossible to push it onto the desired tree, for example from the trees. Also, increasing the length of the arms significantly increases the need for force due to the torque effect of these lever arms, which further enlarges the device. For this reason, it has not been possible to build a practical harvester for tree trunks with a diameter of more than about 50 cm.

• « • Puunrungon ollessa hyvin ohut on siirtyvillå vetorullilla ris- 2 91588 ki ottaa toisiinsa tal kiinteåan vetorullaan kiinni, jolloin puunrungon kåsittely on lopetettava ei-riittåvån pienella run-gon paksuudella. Tama ilmid korostuu varsinkin silloin, kun harvesterin pååmitat ja muotoilu on tehty mahdollisimman suur-5 ta rungon låpimittaa silmållå pitåen. Jos taas mitoitus suun-nitellaan sitå silmalla pitåen, ettå voidaan kåsitellå ohut-runkoista puuta, menetetåån samoilla ulkomitoilla suurimmasta mahdollisesta rungon låpimitasta.• «• When the tree trunk is very thin, the transfer traction rollers have 2 91588 ki to hold them together on their fixed traction roller, in which case the treatment of the tree trunk must be stopped with an insufficiently small trunk thickness. This is especially evident when the dimensions and design of the harvester have been made with the largest possible diameter of the hull in mind. On the other hand, if the dimensioning is designed with the view that thin-frame wood can be treated, the largest possible diameter of the frame is lost with the same external dimensions.

10 Toinen tunnettu vaihtoehto rakentaa harvesteriyksikko on muo-dostaa kiinteån tai kiinteiden vetorullien ja niihin nåhden siirtyvån tai siirtyvien vetorullien pyorintåakselit likimain yhdensuuntaisiksi, jolloin siirtyviå vetorullia liikutetaan suunnassa, joka on likimain kohtisuorassa nåitå pyorintåakse-15 leita vastaan. Tållainen rakenne kykenee kåsittelemåån hyvin-kin ohuita puunrunkoja, mutta paksujen puunrunkojen osalta joudutaan samoihin vaikeuksiin kuin edellå kåsitellyn laitteen yhteydesså, koska laitteen leveys muodostuu halutun suurimman puunrungon paksuuden ja sen molemmilla puolilla olevien veto-20 rullien halkaisijan summasta. Lisaksi vetorullien halkaisijaa pitåisi suurentaa puunrungon paksuuden mukaan siirtovoiman pitåmiseksi riittåvånå.Another known alternative to constructing a harvester unit is to form the rotation axes of the fixed or fixed traction rollers and the displacement or displacement traction rollers approximately parallel, the displacement traction rollers being moved in a direction approximately perpendicular to these rotation axes. Such a structure is capable of handling very thin tree trunks, but for thick tree trunks the same difficulties are encountered as with the device discussed above, because the width of the device is the sum of the desired maximum tree trunk thickness and the diameter of the tension rolls on both sides. In addition, the diameter of the traction rollers should be increased according to the thickness of the tree trunk to keep the transfer force sufficient.

Keksinnon tavoitteena on siten aikaansaada harvesteriyksikko, 25 jolla olisi mahdollista kåsitellå hyvinkin paksuja puunrunkoja ; ilman, ettå yksikon ulkomitat tulisivat haitallisen suuriksi.The object of the invention is thus to provide a harvester unit with which it would be possible to handle very thick tree trunks; without the unit's external dimensions becoming harmfully large.

Tavoitteena on siis harvesteriyksikkd, jonka maksimileveys olisi vain hieman suurempi kuin suurimman kåsiteltåvån puunrungon låpimitta. Keksinnon tavoitteena on edelleen saada ai-30 kaan tåmån tyyppinen harvesteriyksikkd, joka soveltuu ongel-mitta myos hyvin ohuiden puunrunkojen kåsittelyyn. Keksinnon • tavoitteena on edelleen saada aikaan tållainen harvesteriyk sikko, joka on rakennettavissa tukevaksi ilman, ettå paino nousee liian suureksi ja jossa tarvittavat voimat vetorullien 35 puristamiseksi puuta vasten pysyvåt kohtuullisina. Tavoitteena on lisåksi tållainen harvesteriyksikko, joka olisi rakenteel-taan yksinkertainen ja siten hinnaltaan edullinen.The aim is therefore a harvester unit with a maximum width only slightly larger than the diameter of the largest tree trunk to be treated. It is a further object of the invention to provide a harvester unit of this type which is also suitable for the treatment of very thin tree trunks. It is a further object of the invention to provide such a harvester unit which can be built to be stable without the weight becoming too high and in which the forces required to press the traction rollers 35 against the wood remain reasonable. In addition, the aim is to have such a harvester unit which is simple in structure and thus inexpensive.

IIII

3 91 5883 91 588

Edellå kuvatut haittapuolet voidaan eliminoida ja edellå måå-ritellyt tavoitteet saavutetaan keksinnon mukaisella harveste-riyksikollå, jolle on tunnusomaista se, mi tå on mååritelty patenttivaatimuksen 1 tunnusmerkkiosassa.The disadvantages described above can be eliminated and the objects defined above are achieved by a harvester unit according to the invention, which is characterized by what is defined in the characterizing part of claim 1.

55

Keksinnon tårkeimpånå etuna voidaan pitåå sitå, ettå sen mu-kainen harvesteriyksikko on kåsiteltåvåån puuhun nåhden pieni-kokoinen, kevyt ja tukeva. Keksinnon toisena etuna on se, ettå kayttovoima, joka tarvitaan vetorullien puristamiseksi riittå-10 vålla voimalla puunrunkoa vasten, on samaa suuruusluokkaa ta-man puristavan voiman kanssa riippumatta kulloinkin kasiteltå-vån puun lapimitasta, jolloin naitå kåyttolaitteita ei ole tarpeen mitoittaa ylisuuriksi.The main advantage of the invention is that the harvester unit according to it is small, light and sturdy compared to the wood to be treated. Another advantage of the invention is that the driving force required to compress the traction rollers with sufficient force against the tree trunk is of the same order of magnitude as the compressive force, regardless of the shoulder size of the wood to be treated, so that it is not necessary to oversize these drive devices.

15 Seuraavassa keksintoa selostetaan yksityiskohtaisesti oheisiin piirustuksiin viittaamalla.In the following, the invention will be described in detail with reference to the accompanying drawings.

Kuvio 1 esittaa keksinnon mukaista harvesteriyksikkoa kasitel-tåvån puunrungon pituuteen nåhden poikkisuunnassa kuvion 2 20 suunnasta I.Fig. 1 shows a harvester unit according to the invention in a direction transverse to the length of the tree trunk to be treated from the direction I of Fig. 2.

Kuvio 2 esittåå kuvion 1 harvesteriyksikkoa sivulta påin kuvion 1 suunnasta II.Figure 2 shows a side view of the harvester unit of Figure 1 from the direction II of Figure 1.

25 Kuvio 3 esittåå yksityiskohtaiseinmin keksinnon mukaista veto-: rullajårjestelyå samassa kuvannossa kuin kuvio 2.Fig. 3 shows in most detail the traction roller arrangement according to the invention in the same view as Fig. 2.

Kuvio 4 esittåå keksinnon mukaisessa harvesteriyksikosså kåy-tettåvåå vetorullien siirtomekanismia pitkittåisleikkauksena. 30Figure 4 shows a longitudinal section of a traction roller transfer mechanism used in a harvester unit according to the invention. 30

Kuvio 5 esittåå kuvion 4 siirtolaitetta poikkileikkauksena pitkin kuvion 4 tasoa A-A.Fig. 5 shows the transfer device of Fig. 4 in cross-section along the plane A-A of Fig. 4.

Keksinnon mukainen harvesteriyksikko kåsittåå runko-osan, joka 35 on merkitty yleisesti viitenumerolla 1 ja tåhån runko-osaan liitetyn kiinteån vetorullan 2 tai tarvittaessa useampia lin-jassa olevia kiinteitå vetorullia, hihna- tai ketjuvedon tai vastaavan. Harvesteriyksikko kåsittåå myds tåhån kiinteåån 4 91588 vetorullaan 2 nåhden ulospåin ja sisåånpåin siirtyvat vetorul-lat 3 ja 4 puunrungon puristamiseksi rullien våliin, liikutta-miseksi sen pituussuunnassa P vetorullien vålisså ja vålityk-sellå, kun vetorullia 2, 3, 4 pyoritetåån niiden pyorintåakse-5 lien 12, 13, 14 ympåri. Myos siirtyviå vetorullia voi olla useampia kuin esitetyt kaksi, esimerkiksi nelja, tai niiden tilalla voidaan myos kayttaa hihna- tai ketjuvetoa tai vastaa-vaa. Harvesteriyksikko sisaltaa tietenkin tarvittavat puun-tydstdelimet, kuten karsintaterat 40 ja katkaisusahan 41, mut-10 ta koska ne ovat sinansa tavanomaisia, ei niita tassa hakemuk-sessa kåsitella yksityiskohtaisesti.The harvester unit according to the invention comprises a body part 35 generally indicated by reference numeral 1 and a fixed traction roller 2 or, if necessary, several in-line fixed traction rollers connected to this body part, a belt or chain drive or the like. The harvester unit then comprises the traction rollers 3 and 4 which move outwards and inwards to the fixed 4 91588 traction rollers 2 in order to press the tree trunk between the rollers, to move it in the direction of the rollers 5, to rotate it in the direction of the traction rollers. around 12, 13, 14. There may also be more than two of the displaced traction rollers shown, for example four, or a belt or chain drive or the like may be used instead. Of course, the harvester unit includes the necessary wood-filling elements, such as pruning blades 40 and a cutting saw 41, but since they are conventional per se, they will not be discussed in detail in this application.

Runko-osa 1 kåsittåå kaksi toisiinsa yhteydesså olevaa haara-osaa 6 ja 7, jotka muodostavat keskenaan teråvån kulman K.The body part 1 comprises two interconnected branch parts 6 and 7, which form an acute angle K with each other.

15 Kuvatussa toteutusmuodossa on haaraosien 6, 7 vålinen kulma K noin 60°, joka nyt kåytettåvisså olevalla tiedolla nSyttåS edullisimmalta arvolta. Oleellista on, etta tamS kulma K on teråva kulma, ts. alle noin 90°. Sita suuremmat kulma-arvot johtavat huomattaviin mitoituseroihin rakenteessa ja samoihin 20 ongelmiin, kuin mita tekniikan tason mukaisissa laitteissa on. Pienimmillåan haaraosien valinen kulma K voi olla noin 30°, jota pienemmåt kulman arvot taas johtavat yksikon korkeuden huomattavaan kasvuun. Kaikinpuolin kayttokelpoisena kulma-alueena voitanee pitaa vålia noin 50-70°. Rakenne on keksinnon 25 mukaan ainakin suuntajaykka, ts. tåssa kuvattu haaraosien vå-linen kulma K on muuttumaton valmiissa laitteessa.In the illustrated embodiment, the angle K between the branch portions 6, 7 is about 60 °, which, with the information now available, shows the most advantageous value. It is essential that the angle KS is an acute angle, i.e. less than about 90 °. Higher angular values lead to significant dimensional differences in the structure and the same problems as in prior art devices. At its smallest, the angle K between the branch parts can be about 30 °, below which the angle values lead to a considerable increase in the height of the unit. A gap of about 50-70 ° can be considered as a usable angle range in all respects. According to the invention 25, the structure is at least directionally rigid, i.e. the angle K between the branch parts described here is unchanged in the finished device.

Kuvioiden 1 ja 2 toteutusmuodossa haaraosat 6 ja 7 muodostuvat kumpikin kolmesta yhdensuuntaisesta putkesta 24a, 24b, 31a ja 30 25a, 25b, 31b tai vastaavista profiileista. Nåma putket tai profiilit on kiinnitetty toisesta pååstaån poikittaiseen emå-kappaleeseen 22 kiinteasti esimerkiksi hitsaamalla. Talla ta-voin on syntynyt jaykka runkorakenne, jossa on emakappale 22 ja siitå kulmassa K ulkonevat haaraosat 6, 7, jolloin haara-35 osien våliin emåkappaleesta poispain muodostuu mainittu teråvå kulma K ja edullisesti siten, etta tåmån kulman taso 11 on kohtisuorassa emåkappaleen pituutta vastaan. Kuvatun toteutus-muodon runko-osa on tåysin jaykka, ei ainoastaan em. suunta-In the embodiment of Figures 1 and 2, the branch parts 6 and 7 are each formed by three parallel tubes 24a, 24b, 31a and 30 25a, 25b, 31b or similar profiles. These tubes or profiles are fixed at one end to the transverse female body 22 firmly, for example by welding. In this way, a rigid body structure is formed with a parent body 22 and branch portions 6, 7 projecting therefrom at an angle K, said sharp angle K being displaced from the parent body between the branch-35 portions and preferably such that the plane 11 of this angle is perpendicular to the parent body. . The body part of the described embodiment is completely rigid, not only in the above-mentioned direction.

IIII

91588 5 jaykkå. Kayttotilanteessa puunrunko 5 kulkee haaraosien 6 ja 7 vålisså, joten puunrungon pituussuunta P on pååasiallisesti yhdensuuntainen emåkappaleen pituuden kanssa. Nain yhden haa-raosan 6 putket tai profiilit 24a, b ja 31a ovat keskenåån 5 oleellisesti yhdensuuntaisia ja samoin toisen haaraosan 7 putket tai profiilit 25a, 25b ja 31b ovat keskenaan pååasiassa yhdensuuntaisia ja naiden haaraosien valiinsa muodostama kulma on K. Emakappale 22 sisaltaa lisåksi kannatuselimet 23 haara-osista 6, 7 poispåin olevalla puolella koko harvesteriyksikon 10 kiinnittåmiseksi ja kannattamiseksi ei-esitettyyn tyokonee- seen. Haaraosat 6, 7 ovat oleellisen pituisia siten, etta nii-ta pitkin liikkuvat siirtyvåt vetorullat 3, 4 voidaan tamån pituuden suuruisella liikkeella asetella eri paksuisia puunrunko ja 5 vasten, ts. siirtyvåt rullat voidaan haaroja pitkin 15 tuoda lahemmSksi kiinteSa vetorullaa tai vieda kauemmaksi.91588 5 rigid. In use, the tree trunk 5 passes between the branch portions 6 and 7, so that the longitudinal direction P of the tree trunk is substantially parallel to the length of the parent body. The tubes or profiles 24a, b and 31a of one of the branch portions 6 are substantially parallel to each other and likewise the tubes or profiles 25a, 25b and 31b of the other leg portion 7 are substantially parallel to each other and the angle formed by these branch portions is K. The parent body 22 further includes a support 23 on the side away from the branch parts 6, 7 for attaching and supporting the entire harvester unit 10 to a machine (not shown). The leg portions 6, 7 are of substantially long length so that the movable traction rollers 3, 4 moving along them can be placed against the tree trunk and 5 of different thicknesses with a movement of this length, i.e. the movable rollers can be brought closer along the branches 15 or further away.

Haaraosien 6, 7 pituuden L, mitattuna kiinteån vetorullan 2 ja puunrungon kosketuskohdasta haaraosan paahan on ilmeisesti oltava vahintaan paksuinunan kasiteltavan puunrungon sateen R, ts. låpimitan puolikkaan suuruinen.The length L of the branch parts 6, 7, measured from the point of contact of the fixed traction roller 2 and the tree trunk, to the head of the branch section must obviously be at least half the diameter of the rain R of the tree trunk to be treated.

2020

Kiintea vetorulla 2 on sijoitettu haaraosien 6, 7 valiin emå-kappaleen 22 viereen siten, etta kiinteån vetorullan pyorinta-taso 10 muodostaa mainitun teråvån kulman K puolittajan. Har-vesteriyksikkd on siten paapiirteittain symmetrinen kiinteån 25 vetorullan 2 pyorintatason 10 suhteen. Ymmarrettåvasti jotkin yksittåiset osat ja kayttolaitteet aiheuttavat tahan poikkea-mia. KiinteSa vetorullaa 2 kayttHa moottori 38, edullisesti hydraulimoottori, ja moottorin ja vetorullan pyorintaakseli-linja 12 on yhdensuuntainen kulman K tason 11 kanssa.The fixed traction roller 2 is arranged in the selection of the leg portions 6, 7 adjacent to the base body 22 so that the rotation plane 10 of the fixed traction roller forms a bisector of said sharp angle K. The har-west unit is thus symmetrically symmetrical with respect to the rotation plane 10 of the fixed traction roller 2. Understandably, some individual parts and drive devices cause any deviations. The fixed traction roller 2 is driven by a motor 38, preferably a hydraulic motor, and the axis of rotation 12 of the motor and the traction roller is parallel to the plane 11 of the angle K.

3030

Ensimmaisessa haaraosassa on ainakin yksi luisti 8 ja esite-tysså kuvioiden mukaisessa toteutusmuodossa on jokaisessa mai-nitussa putkessa oma luistinsa 8 ja toisessa haaraosassa 7 on vastaavasti ainakin yksi luisti 9 tai kuvioissa esitetylla 35 tavalla jokaisessa mainitussa putkessa oma luistinsa 9, joka tai jotka ovat liikkuvia paåasiassa kyseisen haaraosan ul-konemissuunnassa Dl ja vastaavasti D2 tai nåita vastaan. Kum-mankin haaran luistiin tai luisteihin 8 ja vastaavasti 9 nii- 6 91588 den toisiaan osoittaville sivuille on kiinnitetty siirtyvå ve-torulla 3 ja vastaavasti 4. Siirtyvåt vetorullat 3 ja 4 on sijoitettu edullisesti kahden peråkkåisen putken 24a ja 24b ja vastaavasti 25a ja 25b våliin, jolloin putkien vålimatka suun-5 nassa P on isompi kuin vetorullan halkaisija, jotta vetorulla paåsee myohemmin tarkemmin selostettavalla tavalla kååntymåån. Naita vetorullia 3 ja 4 kåytetaån myos oxnilla moottoreillaan 39, edullisesti hydraulimoottoreilla, ja niiden pyorintaakse-lilinjat 13 ja 14 ovat myos ainakin likimain haaraosien vali-10 sen kulman K tason 11 suuntaisia. Tålloin kaikki vetorullat 2, 3, 4 kykenevat siirtåmåån puuta pyoriessåån puunrungon pituus-suuntaan P. Haaraosat 6, 7 ovat edullisesti suoria ja luistit 8, 9 liikkuvat niita pitkin esimerkiksi luistaen, jolloin siirtyvåt vetorullat 3 ja 4 siirtyvåt luistien mukana kauem-15 maksi tai låhemmåksi toisiaan ja kiinteåå vetorullaa 2. Kun siirtyvåt vetorullat 3 ja 4 ovat haaraosien 6 ja 7 påiden 26 ja 27 låhellå, on niiden etåisyys toisistaan ja kiinteåstå vetorullasta suurimmillaan, jolloin mahdollistuu såteeltåån R suuren puunrungon kåsittely. Kun luistit vedetåån låhemmåksi 20 kiinteåå vetorullaa, låhenevåt niisså olevat siirtyvåt vetorullat 3 ja 4 sekå toisiaan ettå kiinteåå vetorullaa, jolloin kåsiteltåvån puunrungon såde R pienenee.The first branch part has at least one slide 8 and in the embodiment according to the figures shown, each said tube has its own slide 8 and the second branch part 7 has at least one slide 9 or, as shown in the figures, each said tube has its own slide 9 which is movable. mainly in the direction of projection of the branch part in question D1 and D2 or against them, respectively. A movable traction tube 3 and 4, respectively, are fastened to the slides or slides 8 and 9 91588 respectively of each branch of the branch. The movable traction rollers 3 and 4 are preferably arranged between two successive tubes 24a and 24b and 25a and 25b, respectively. , in which case the distance between the tubes in the direction P-5 is larger than the diameter of the traction roller, so that the traction roller can later be turned in a manner to be described in more detail. These traction rollers 3 and 4 are also driven by oxn motors 39, preferably hydraulic motors, and their rotary axial lines 13 and 14 are also at least approximately parallel to the plane 11 of the angle K of the branch sections. In this case, all the traction rollers 2, 3, 4 are able to move the wood in the longitudinal direction P when rotating the wood. The branch parts 6, 7 are preferably straight and the slides 8, 9 move along them, for example by sliding, whereby the moving traction rollers 3 and 4 move farther or closer to each other and to a fixed traction roller 2. When the displacing traction rollers 3 and 4 are close to the ends 26 and 27 of the branch portions 6 and 7, their distance from each other and from the fixed traction roller is greatest, thus handling a large tree trunk R. As the slides are pulled closer to the 20 fixed traction rollers, the movable traction rollers 3 and 4 in them converge with each other and with the fixed traction roller, whereby the radius R of the tree trunk to be treated decreases.

Siirtyvåt vetorullat 3 ja 4 on kiinnitetty luisteihin 8, 9 25 nivelillå, jotka sallivat vetorullien kallistumisen luisteihin [ nåhden akseliviivojen 16 ja 17 ympåri. Nåmå kallistusakseli- viivat 16, 17 ovat pååasiassa kohtisuorassa haaraosien vålisen kulman K tasoa 11 vastaan ja sijaitsevat kyseisten vetorullien pyorimisakselien 13, 14 suunnassa nåiden vetorullien 3 ja 4 30 vieresså. Edullisesti nåmå kallistusakseliviivat 16, 17 ovat vetorullien pyorimisakselien suunnassa mahdollisimman låhellå rullia. Edullisimmin nåmå kallistusakseliviivat 16, 17 ovat kunkin siirtyvån vetorullan 3, 4 vieresså sen siinå reunassa, joka osoittaa kiinteåån vetorullaan 2 påin. Nåin rullia kal-35 listavan voimaelimen 15 vaikutusta vastustava momentti on pie-ni ja rulian tyopinnan liikematka myos pieni, jolloin rulla asettuu pelkåståån kallistumalla oikeaan asentoon puunrunkoa 5 vasten. Nåmå siirtyvåt vetorullat 3, 4 on voimaelimillå 15The movable traction rollers 3 and 4 are fixed to the slides 8, 9 by 25 joints which allow the traction rollers to be inclined to the slides [with respect to the axis lines 16 and 17. These tilt axis lines 16, 17 are substantially perpendicular to the plane 11 of the angle K between the leg portions and are located in the direction of the rotation axes 13, 14 of the respective traction rollers adjacent to these traction rollers 3 and 4. Preferably, these tilt axis lines 16, 17 are as close as possible to the rollers in the direction of the rotation axes of the traction rollers. Most preferably, these tilt axis lines 16, 17 are adjacent to each displacement traction roller 3, 4 at the edge thereof which points towards the fixed traction roller 2. Thus, the torque counteracting the effect of the force member 15 that rolls the rollers is small and the travel of the roller working surface is also small, whereby the roller is positioned only by tilting it into the correct position against the tree trunk 5. The traction rollers 3, 4 which move in this way are on the force members 15

IIII

91588 7 kuormitettu kallistumaan akseliviivojensa 16, 17 ympari sel-laiseen kiertosuuntaan S, joka haaraosien 6 ja 7 vålisså, ts. kulman K alueella, on kohdistuneena paapiirteittain kiinteaan vetorullaan 2 pain. Siirtyvien vetorullien tata kallistumista 5 akseliviivojen 16, 17 ympari on rajoitettu siten, etta kun vetorullat ovat voimaelimen 15 vaikutuksesta loppuunkåånty-neessa asennossaan, ovat naiden vetorullien pyorintåtasot 18, 19 likimain yhdensuuntaiset aina vastaavan haaraosan 6 ja 7 ulkonemissuunnan Dl ja vastaavasti D2 kanssa. Tallå jårjeste-10 lyllå siirtyvåt vetorullat 3 ja 4 tulevat oikeaan asentoon niiden ollessa låhimpånå kiinteåå vetorullaa 2, kuten kuviossa on katkoviivoilla esitetty poikkimitaltaan pienen puunrungon yhteydesså. Toisaalta taas joustomahdollisuus kuormitettua kiertosuuntaa S vastaan mahdollistaa siirtyvien vetorullien 3, 15 4 asettumisen oikeaan asentoon suurta puunrunkoa vasten, jol- loin siirtyvien vetorullien pyorintåtasot tulevat likimain puunrungon sateen suuntaisiksi ja pyorintåakselilinjat 13 ja 14 likimain puun pinnan tangentin suuntaisiksi. Tålldin vetorullien pitovoima ja siirtovoima on parhaimmillaan. Tama jar-20 jestely mahdollistaa myos poikkimitaltaan suuren puunrungon tyontymisen haarojen ja haarojen påisså 26, 27 olevien siirtyvien vetorullien 3, 4 vålistå aloitettaessa tartunta uuteen kåsittelemåttomåån puunrunkoon. Aikaisemmin mainittu harveste-riyksikon runko-osan 1 muodostuminen valimatkan pååsså toisis-25 taan olevista putkista tai profiileista antaa siirtyville ve-,: torullille tåtå kallistiimistilaa. Talldin vetorullat ovat osittain haaraosien 6, 7 kohdalla ja laitteen mitat ovat pie-nimmillåån.91588 7 is loaded to tilt around its axis lines 16, 17 in a direction of rotation S which, between the branch parts 6 and 7, i.e. in the region of the angle K, is applied in a transverse manner to the fixed traction roller 2. The inclination of the movable traction rollers 5 around the axis lines 16, 17 is limited so that when the traction rollers are in their end position under the action of the force member 15, the rotation planes 18, 19 of these traction rollers are approximately parallel to the respective branch portion D2. The traction rollers 3 and 4, which move in such a system-10, come into the correct position when they are closest to the fixed traction roller 2, as shown in the figure by broken lines in connection with a small trunk of a tree. On the other hand, the flexibility against the loaded direction of rotation S allows the movable traction rollers 3, 15 4 to be positioned in the correct position against the large tree trunk, whereby the rotational planes of the movable traction rollers become approximately parallel to the rain of the tree trunk and the rotation axis lines 13 and 14 Tålld's traction rollers have the best grip and transfer force. This jar-20 arrangement also allows a large cross-section of the tree trunk to protrude between the branches and the movable traction rollers 3, 4 at the ends 26, 27 of the branches when starting to adhere to a new untreated tree trunk. The previously mentioned formation of the body 1 of the harvester unit from spaced apart pipes or profiles gives the moving water rollers this expensive tight space. The traction sheaves of the hoist are partly at the branch parts 6, 7 and the dimensions of the device are at a minimum.

30 Keksinnon mukaan on kummassakin haaraosassa 6, 7 ainakin yksi kayttomekanismi 20, 21 ja kuvioiden mukaisessa edullisessa toteutusmuodossa on kussakin putkessa tai profiilissa tållai-nen kåyttomekanismi 20, 21 luistien 8, 9 liikuttamiseksi voi-malla kiinteåå vetorullaa 2 kohti. Tåmån suuntaisella liik-35 keellå puunrunko 5 puristetaan vetorullien våliin ja kun runko on kåsitelty siirretåån luistit ja niisså olevat siirtyvåt vetopydrat nåillå kayttomekanismeilla 20, 21 takaisin haaraosien påihin 26, 27, jolloin harvesteriyksikko on valmiina 91588 8 tarttumaan uuteen kåsittelemåttomåån puunrunkoon. Tama puun-runkoon tarttuminen tapahtuu tyontåmållå haaraosat 6, 7 niiden påissa olevine vetorullineen 3, 4 puunrungon 5 kahta puolta, minka jålkeen kåyttomekanismeilla 20, 21 siirretaan luisteja 5 8, 9 haaraosiensa ulkonemissuuntiin Dl, D2 nåhden vastakkai- seen suuntaan, ts. kiinteåa vetorullaa 2 kohti, jolloin siir-tyvåt vetorullat asettuvat puunrunkoa vasten ja puunrunko 5 puristuu kiinteån ja siirtyvien vetorullien våliin. Taman jal-keen puunrungon kåsittely voi alkaa sinansa tunnetulla taval-10 la. Siirtyvisså vetorullissa on tietenkin tåtå vårten mootto-rit 39, edullisesti hydraulimoottorit, kuten kiinteasså veto-rullassa. Kun siirtyvåt vetorullat 3, 4 ovat keksinnon mukai-sesti hyvin låhella varsiosia 6, 7 tai vielåpå niiden kohdal-la, ainakin osittain, on luistien kåyttomekanismin 20, 21 ja 15 siirtyvån vetorullan valimatkan pieni, jolloin kayttomekanismi vaikuttaa oleellisesti taydella tehollaan vetorulliin. Ts. kåyttomekanismin ja vetorullan valimatkan muodostama vipuvarsi on pieni, joten kayttolaitteen ei ole tarpeen tyoskennella vastustavaa momenttia vastaan. Tama saadaan aikaan silla, etta 20 kummankin kallistusakselin 16, 17 etaisyys vastaavan varsiosan 6, 7 keskilinjasta ja erityisesti kyseisen kåyttomekanismin 20, 21 toimintalinjasta on mahdollisimman pieni sen lisåksi, ettå kallistusakselien 16, 17 etaisyys vetorullasta on pieni. Kallistusakselit 16, 17 voivat olla aivan varsiosien vieressa, 25 kuten kuvioissa, tai niiden kohdalla.According to the invention, each branch part 6, 7 has at least one drive mechanism 20, 21 and in the preferred embodiment according to the figures each tube or profile has such a drive mechanism 20, 21 for moving the slides 8, 9 by force towards the fixed traction roller 2. In this parallel direction, the tree trunk 5 is pressed between the traction rollers and, after the trunk has been treated, the slides and the displacement traction shafts therein are moved by these drive mechanisms 20, 21 back to the branches 8, 27, the harvester unit being ready to grip 9. This gripping of the tree trunk takes place by pushing the branch parts 6, 7 with the traction rollers 3, 4 on their sides on the two sides of the tree trunk 5, after which the drive mechanisms 20, 21 move the slides 5 8, 9 in a direction opposite to the projections D1, D2. 2, whereby the movable traction rollers are placed against the tree trunk and the tree trunk 5 is pressed between the fixed and movable traction rollers. After this, the treatment of the tree trunk can start in the usual way. Of course, the movable traction rollers thus have motors 39, preferably hydraulic motors, such as in a fixed traction roller. When the displacement traction rollers 3, 4 according to the invention are very close to the arm parts 6, 7 or even at them, at least in part, the distance of the displacement traction roller of the sliding drive mechanism 20, 21 and 15 is small, whereby the drive mechanism acts substantially at full power. Ts. the lever arm formed by the distance between the drive mechanism and the traction roller is small, so it is not necessary for the drive to work against the resisting torque. This is achieved by the fact that the distance of each tilting axis 16, 17 from the center line of the respective arm part 6, 7 and in particular from the operating line of the drive mechanism 20, 21 in question is as small as possible, in addition to the distance of the tilting axles 16, 17 from the traction roller. The tilting shafts 16, 17 can be right next to the arm parts, 25 as in the figures, or at them.

> · ·> · ·

Keksinnon mukainen laite saadaan erityisesti puunrungon aihe-uttamaa vaantoa vastaan tukevammaksi yhdiståmålla aina yhden haaraosan 6 ja 7 luistit 8, 9 toisiinsa emåkappaleen suuntai-30 sella tukitangolla 35 ja 36 tai vastaavalla. Nama tukitangot 35 ja 36 liikkuvat siis aina samanpuoleisten luistien 8 ja 9 kanssa yhtena kappaleena. Voidaan ajatella, etta nåmå tangot 35 ja 36 ovat jo itsessåån muotoillut luisteiksi. Edellå mai-nitut karsintateråt 40 ja puunrungon katkaisuterå 41 kåytto-35 laitteineen on edullista kiinnittåå juuri nåihin tukitankoihin 35 ja 36. Erityisesti ulommat karsintateristå 40 kåyttolait-teineen 42 on edullista jårjeståå ylempien putkien 24b ja 25b ja lisåputkien 31a ja 31b våliin ja sisåpuoliset karsintate- 91588 9 rista 40 lisåputkien 31a, 31b ulkopuolelle. Katkaisuterå 41 on taas edullista jarjestaa alimpien putkien 24a ja 25a ulkopuolelle. Tålloin puunkåsittelylaitteiden karsintateråt, vetorul-lat ja katkaisuterS ovat toiminnallisesti oikeassa jårjestyk-5 sesså ja tukevasti kiinni harvesteriyksikosså.The device according to the invention is made more robust, in particular against the groove caused by the tree trunk, by always connecting the slides 8, 9 of one branch part 6 and 7 to each other with a support bar 35 and 36 or the like in the direction of the parent body. Thus, these support rods 35 and 36 always move in one piece with the slides 8 and 9 on the same side. It is conceivable that these rods 35 and 36 are already formed into slides per se. The aforementioned pruning blades 40 and the tree trunk cutting blade 41 with its drive devices 35 are preferably attached to these support rods 35 and 36. In particular, the outer pruning blades 40 with the drive devices 42 91588 9 cross 40 outside the additional pipes 31a, 31b. Again, it is preferable to arrange the cutting blade 41 outside the lower tubes 24a and 25a. In this case, the pruning blades, traction rollers and cutting blades of the wood processing equipment are functionally in the correct order and firmly attached to the harvester unit.

Siirtyvia vetorullia 3, 4 kuormittava mainittu voimaelin 15 on esimerkiksi jousi ja edullisesti kallistusakselilla 16, 17 oleva hakastyyppinen jousi, kuten on nåhtåvisså kuviosta 3 ja 10 sen tarkoituksena on kallistaa siirtyvat vetorullat 3, 4 oike-aan kulma-asentoon. On selvåå, etta muunkinlaista mekanismia voidaan kåyttåå. Luistien kåyttdmekanismit 20, 21 ovat edullisesti ainakin likimain haaraosan suuntaisia hydraulisylinte-reita 28, 34, joidenka ensimmåinen paa 29a on kiinni runko-15 osassa 1 kiintean vetorullan låhellå, kuten esimerkiksi haara-osien juuressa tai emakappaleessa tai naiden liitoskohdassa. Hydraulisylinterin 28, 34 liikkuva toinen påå 30 on kiinni luistissa 8, 9 sen liikuttamiseksi haaraosien suunnassa Dl, D2 jompaan kumpaan suuntaan. Erityisen edullisesti hydraulisylin-20 terit 28, 34 ovat kaksitoimisia sylintereita, joissa on lapi-menevå mannånvarsi 37a, joka on yhdestå paastå 29a kiinnitetty edellå mainitulla tavalla harvesteriyksikdn runko-osaan kiin-teån vetorullan 2 låhelle ja toisesta pååstå 29b haaraosan putken, profiilin tai vastaavan pååhån 26, 27. Hydraulisylin-25 terin måntåosa 37c on kiinnitetty kiinteåsti tåhån månnånvar-.· teen 37a sen pituuden sopivalle kohdalle, kuten esimerkiksi likimain keskelle. Hydraulisylinterin sylinteriosa 37b on liikkuva månnån 37 påållå ja molemmissa påissåån olevien tii-vistettyjen reikien kautta månnånvartta 37a pitkin ja tåhån 30 sylinteriosaan 37b on kiinnitetty esimerkiksi hitsaamalla tai muulla kiinteållå tavalla kiinnityspalat 30, jotka taas on kiinteåsti liitetty esimerkiksi hitsaamalla vastaaviin luisteihin 8, 9. Kiinnityspalat 30 ulkonevat haaraosan 8, 9 putkista 24a, 24b, 25a, 25b, 31a, 31b tai profiileista niisså 35 olevien rakojen 42 kautta. Tåsså jårjestelysså hydraulineste ohjataan sylinterin sisålle månnånvarressa 37a olevia kanavia 43a, 43b pitkin, toista kanavaa månnån toiselle puolelle ja toista kanavaa månnån toiselle puolelle. Tållå jårjestelyllå 10 91588 saadaan haaraosien 8, 9 putket ja rakenne entiseståån tukevoi-tua, koska månnånvarsi on molemmista påiståån kiinni ja sylin-teriosa 37b on putken tai profiilin sisållå suhteellisen tii-viisti. Tållå jårjestelyllå saadaan myos kiinnityspalalla 30 5 sylinterin pituussuunnassa laajapintainen kiinnitys tåmån kåyttomekanismin 20, 21 ja luistin 8, 9 vålille. Tållå kokonais jår jestelyllå on myos se etu, ettå tåmå edullinen hyd-raulisylinterijårjestely muodostaa pååasiallisen puristusvoi-man puunrunkoa 5 vastaan, kun taas siirtyvien vetorullien voi-10 maelimet 15 saavat aikaan siirtyvien vetorullien nopean vas-teen puunrungon mahdollisiin mutkiin, joten yhteisvaikutuksena on, ettå kaikki vetorullat ovat jatkuvasti tehokkaassa koske-tuksessa puunpinnan kanssa, jolloin siirto-ongelmia ei synny.Said force member 15 loading the movable traction rollers 3, 4 is, for example, a spring and preferably a hook-type spring on the inclination shaft 16, 17, as can be seen in Figures 3 and 10, for the purpose of tilting the movable traction rollers 3, 4 to the correct angular position. It is clear that other types of mechanism can be used. The drive mechanisms 20, 21 of the slides are preferably at least approximately parallel to the branch portion hydraulic cylinders 28, 34, the first end 29a of which is attached to the body portion 15 near the fixed traction roller, such as at the base or parent body of the branch portions or at their junction. The movable second end 30 of the hydraulic cylinder 28, 34 is attached to the slide 8, 9 to move it in the direction of the branch parts D1, D2 in either direction. Particularly preferably, the blades 28, 34 of the hydraulic cylinder-20 are double-acting cylinders with a transverse manhole arm 37a fixed from one of the fasteners 29a in the above-mentioned manner to the body of the harvester unit near the fixed drive roller 2 and from the other end of the tube 29b on the head 26, 27. The piston part 37c of the hydraulic cylinder-25 blade is fixedly fixed to this piston rod 37a at a suitable place along its length, such as approximately in the middle. The cylinder part 37b of the hydraulic cylinder is movable on the piston 37 and through the sealed holes in both ends along the piston rod 37a and in this way 30 in the cylinder part 37b are fixed to the 30 project from the tubes 24a, 24b, 25a, 25b, 31a, 31b or the profiles of the branch part 8, 9 through the slots 42 in them 35. In this arrangement, the hydraulic fluid is directed inside the cylinder along the channels 43a, 43b on the piston rod 37a, one channel on one side of the piston and the other channel on the other side of the piston. With this arrangement 10 91588, the tubes and the structure of the branch parts 8, 9 can be further strengthened, since the piston rod is closed at both ends and the cylinder part 37b is relatively tight inside the tube or profile. In this arrangement, a fastening piece 30 5 also provides a wide-area fastening in the longitudinal direction of the cylinder between this drive mechanism 20, 21 and the slider 8, 9. This overall arrangement also has the advantage that this preferred hydraulic cylinder arrangement generates the main compressive force against the tree trunk 5, while the forces 15 of the displacement traction rollers provide a rapid response of the displacement traction rollers to the joint, thus all the traction rollers are in constant effective contact with the wood surface, so that no transfer problems arise.

15 Keksinto ei ole mitenkåån rajoitettu edellå kuvattuun edulli-simpaan toteutusmuotoon, vaan voi sisåltåå muunnoksia oheisten patenttivaatimusten måårittelemisså rajoissa. Siten erityises-ti haaraosat 6, 7 voivat olla paitsi esitettyjå putkia tai profiileja myos levystå tai muista komponenteista muodostettu 20 yhtenåinen rakenne. Samoin mahdolliset putket tai profiilit voivat olla erilaisia tai niiden lukumåårå voi vaihdella. Myos luistien 8, 9 muotoilu ja kiinnitysjårjestely voi olla erilai-nen kuin mitå edellå on selostettu. Erityisesti luistien kåyt-tomekanismit voivat olla erilaisia, kuten esimerkiksi pneu-25 maattisia sylintereitå, ketjuvetoja, ruuvikåyttojå tai vastaa-via. Selvemmin poikkeavana toteutusmuotona on ajateltavissa haaraosien 6 ja 7 muodostamista teleskooppisiksi, jolloin aina yksi luisti 8, 9 on liitetty kiinteåsti tållaisen teleskooppi-sen haaraosan påån 26, 27 alueelle liikkumaan haaraosan ulko-30 nemissuunnassa Dl ja D2 tai sitå vastaan. Nåmå teleskooppiset haaraosat 6, 7 muodostavat tietenkin keskenåån teråvån kulman K ja muodostavat kåyttolaitteineen runko-osan 1 kanssa jåykån runkorakenteen. Molemmissa luisteissa on tietenkin edellå ku-vatulla tavalla siirtyvåt vetorullat. Kuten jo aikaisemmin on 35 todettu, on måårittelyn vetorullan ymmårrettåvå tarkoittavan myos hihna- tai ketjuvetoa tai useampia vetorullia, joiden rakenne voi olla mitå tahansa tarkoitukseen soveltuvaa tyyp-piå.The invention is in no way limited to the most preferred embodiment described above, but may include modifications within the limits defined by the appended claims. Thus, in particular, the branch parts 6, 7 can be, in addition to the tubes or profiles shown, also a uniform structure formed of a plate or other components. Likewise, the possible pipes or profiles may be different or their number may vary. The design and fastening arrangement of the slides 8, 9 can also be different from what has been described above. In particular, the drive mechanisms of the slides can be various, such as pneumatic cylinders, chain drives, screw drives or the like. As a more distinct embodiment, it is conceivable for the branch parts 6 and 7 to be telescopic, in which case always one slider 8, 9 is fixedly connected to the area 26, 27 of such a telescopic branch part to move in the direction of extension of the branch part D1 and D2 or against it. These telescopic branch parts 6, 7 of course form a sharp angle K with each other and together with the drive devices form a rigid frame structure with the body part 1. Both slides, of course, have traction rollers which move as described above. As stated earlier, the definition of a traction sheave is to be understood to mean also a belt or chain drive or a plurality of traction sheaves, the construction of which may be of any type suitable for the purpose.

IIII

Claims

91588 11

A harvester unit comprising a body part (1), a fixed traction roller (2) in the body part or the like and traction rollers (3, 4) or the like displacing the outward and slant pressure therewith to move the tree trunk (5) in its longitudinal direction (P) between the traction rollers and during transmission when the traction rollers are rotated, as well as the necessary wood working members, characterized in that the run-part (1) comprises two interconnected substantially long branch parts (6, 7) forming a frame structure of the directional rigid 10 and projecting from the region of the fixed traction roller (2) at a median acute angle (K) outwards, that each branch part has at least one slide (8, 9) which is movable mainly in and out of the projection direction (D1, D2) of said branch part, and that said movable traction roller (3 and 4) 15 or rollers are fixed to the slides (8 and 9 respectively) of each branch in order to obtain the traction rollers (3, 4) movable on their side facing each other to the respective tree trunk (5) against the surface mainly by the movement of the slides (8, 9).

Harvester unit according to claim 1, characterized in that the effective rotating plane (10) of the fixed traction roller (2) or the like forms a bisector of the angle (K) between the branch parts (6, 7) and that all traction rollers (2, 3, 4) the axes of rotation (12, 13, 14) are at least approximately parallel to the plane of the angle (11) between the branch sections and that the displaceable drive rollers (3, 4) are fixed to the slides (8, 9) by axial lines (16) , 17) to be inclined around, which are substantially perpendicular to the plane of the angle between the branch parts (11). 30

Harvester unit according to Claim 1, characterized in that the displaceable traction rollers (3, 4) are loaded by the force element (15) to tilt around their axis lines (16, 17) in a direction of rotation (S) which angle (K) 35 between the branch parts (6, 7) in the region is directed mainly towards the fixed traction roller (2), that the inclination axis lines (16, 17) of the displacement traction rollers are in the direction of the rotation axes (13, 14) adjacent to these traction rollers and that the displacement traction rollers (3, 4) in their end position, their respective rotation planes (18 and 19) are approximately parallel to the projection direction (D1 and D2, respectively) of the respective branch portion. 5

Harvester unit according to claim 1, characterized in that each branch part (6, 7) has at least one drive mechanism (20, 21) for moving the slides (8, 9) by pressing the fixed traction roller (2) towards the fixed trunk (2). - 10 sexes for the selection of traction rollers and for returning the slides in opposite movements to the ends of the crotch parts (26, 27).

Harvester unit according to claim 1, characterized in that the body part (1) comprises a fixed traction roller (2) 15 opposite the plane (11) of the corner on the side away from said corner (K), a transverse base body (22) comprising the harvester unit support members (23), that each branch part (6, 7) consists of at least two tubes (24a, b; 25a, b) at the end of each displacement traction roller (3, 4) moving in the direction of the parent body and at a distance (H1) ) or the profile along or along which the slides (8, 9) move, and that the length (L) of the branch parts (6, 7) from the working surface of the fixed traction roller (2) is preferably at least the thickest trunk (5) to be treated (R) the size of. 25

Harvester unit according to claim 5, characterized in that each branch part (6, 7) further comprises, in the direction of at least one parent body, of tubes (24a, b; 25a, b) or profiles on both sides of the traction rollers at a distance 30 (H2). a tube (31a, b) or profile parallel to them, that these additional tubes or profiles each have an additional slide (32, 33) and a slider drive mechanism (34), such as a hydraulic cylinder, for moving the slides in the projecting direction of the branches (D1, D2); and that the harvester unit includes wood pruning blades (40) pivotally attached to at least these additional slides (32, 33). a · II 91588 13

Harvester unit according to one of Claims 3 to 6, characterized in that each drive mechanism (20, 21) of the slider (8, 9) is a hydraulic cylinder (28, 34) substantially parallel to the branch, the first fixed end (29a) of which ) is attached to the body portion (1) in the region of the fixed traction roller (2) and the other movable end (30) is attached to the slide to move it in the direction of the branch portion (D1, D2) so that the movement of the slide (8, 9) is linear. 6, 7) and that each force member (15) loading the displacement traction rollers is a spring, preferably a hook-type spring on a tilting shaft (16, 17).

Harvester unit according to Claim 5 or 7, characterized in that the slides (8, 9) of each branch part (6, 7) are always connected to one another by a support rod (35, 36) parallel to the parent body or the like, the harvester unit comprising a tree trunk. the cutting blade (41) pivotally attached to one of these support rods (35 or 36).

Harvester unit according to Claim 6 or 7, characterized in that the hydraulic cylinders (28, 34) forming the drive mechanisms of the slides (8, 9) have a double-acting cylinder path, the first end (29a) of which is attached to the body part by a piston rod (29a). ) one end thereof, the other end (29b) being fixed to the end (26, 25 27) of the respective branch part (6, 7) and to the cylinder part (37b) of said slides being fixed by fastening pieces (30), whereby the hydraulic fluid is fed into and out of the cylinder along the piston rod (37a), and that the drive rollers (2, 3, 4) are driven by a hydraulic motor, the motor (38) of the fixed drive roller (2) being fixed to the body part (1) and the motors (39) of the movable drive rollers (3, 4) respectively to the slides (8, 9).

Harvester unit according to any one of the preceding claims, characterized in that said acute angle (K) between the branch portions (6, 7) is between 30 ° and 90 °, preferably of the order of about 60 °. 14 91588

Harvester unit according to one of the preceding claims, characterized in that there are more than one fixed traction rollers (2) and / or movable traction rollers (3, 4), even in the fibrous branch part (6, 7). 5

Harvester unit according to one of the preceding claims, characterized in that the branch parts (6, 7) are telescopic structures and in that the slides (8, 9) are fixedly connected to the shirts area 10 of these telescopic branch parts for moving them by means of displaceable traction rollers (3, 4). ) in the direction of projection of the branch portions (D1 and D2) or against it. r «• · II 91588 15