Uppfinnare: K E A Jonsson och N 0 Johanson For matning av stockar genom barkningsmaskiner av hAlrotortyp är det vanligt att saval framfor sum efter barkningsrotorn placera ett matarverk bestaende av tva eller tre samverkande, drivna rullar, som aro forskjutbara mot och fran varandra for att ingripa mot mantelytan pd. en stock i ett gemensamt, mot stockens langdriktning vinkelratt plan. Harvid ir det emellertid ofta svart att undvika en viss pendling hos i synnerhet korta stockar, nar dessa vid inmatning av framre anden i rotorn resp. vid utmatning av bakre anden endast uppha.ras av det ena matarverket. Pendlingen kan i viss man minskas genom att matarrullarna placeras sa nara rotorn som mojligt, men hittills har styrningsproblemet ej lasts hell tillfredsstallande.
Inventors: KEA Jonsson and N 0 Johanson For feeding logs by hAl rotor type debarking machines, it is common to place a feed mill consisting of two or three cooperating, driven rollers, which are displaceable towards and from each other to intervene against the mantle surface. pd. a log in a common plane perpendicular to the longitudinal direction of the log. In this case, however, it is often difficult to avoid a certain oscillation of particularly short logs, when these when feeding the front spirit into the rotor resp. when the rear duct is discharged, only one feeder is stopped. The oscillation can to some extent be reduced by placing the feed rollers as close to the rotor as possible, but so far the steering problem has not been fully satisfactorily loaded.
Enligt uppfinningen har det visat sig mdjligt att vid matning av ved och stockar genom barkningsrotorer astadkomma en fOrbattrad styrning darigenom, att en roterbar hjalprulle med vasentligt mindre diameter är monterad parallell med varje matarrulle tiitt intill dennas periferi pa sadant salt, att matarrullens och hjalprullens Mat rotorns centrumlinje vanda, periferiella ytdelar ligga i ett gemensamt, med frammatningsriktningen parallellt plan, varigenom avert hjalprullarna ingripa mot stocken for att styra densamma. Vid inmatningen i barkningsrotorn kommer en stock pa detta sdtt alltid att stodjas tangs tva med nagot mellanrum belagna periferilinjer, varigenom barkningsorganen vid silt forsta ingrepp mot stockanden ej riskera att fOrslitta denna i pendling. According to the invention, it has been found possible in feeding wood and logs by barking rotors to achieve improved control in that a rotatable auxiliary roller of substantially smaller diameter is mounted parallel to each feed roller adjacent to its periphery on such salt that the feed rotor of the feed roller and auxiliary roller centerline vanda, peripheral surface portions lie in a common, with the feed direction parallel plane, whereby the auxiliary rollers engage against the log to guide it. When feeding into the barking rotor, a log in this way will always be supported by two peripheral lines coated at somewhat intervals, whereby the barking means at silt first engagement with the logging end do not risk wearing it in oscillation.
Varje hjalprulle drives av axeln till motsvarande matarrulle. Vidare uppbares varje hjalprulle av samma stod som tillhorande matarrulle. Each auxiliary roller is driven by the shaft of the corresponding feed roller. Furthermore, each auxiliary roller is supported by the same stand as the associated feed roller.
Anordningen enligt uppfinningen beskrives narmare under hfinvisning till bifogade ritningar, dar fig. 1 i schematiserad form visar tva framfor resp. efter en barkningsrotor placerade matarverk. Fig. 2 visar anordningen sedd frail hoger i fig. 1. Fig. 3 visar i storre skala en axiell skarning genom en matarrulle och dess koppling till en hjalprulle. Fig. 4 visar en tvarsektion tangs linjen IV—IV i fig. 3. The device according to the invention is described in more detail with reference to the accompanying drawings, in which Fig. 1 shows in schematic form two in front of resp. after a barking rotor placed feeders. Fig. 2 shows the device seen frail hoger in Fig. 1. Fig. 3 shows on a larger scale an axial cut through a feed roller and its coupling to an auxiliary roller. Fig. 4 shows a cross section of the tangent line IV-IV in Fig. 3.
I fig. 1, som huvudsakligen endast liar till uppgift att visa matarverkens placering i forhallande till barkningsmaskinen, an som synes en hjalprulle 5 plaeerad mellan varje matarrulle 6 och barkningsrotorn 7 vid dennas inmatningsande. Vid utmatningsanden aro hjalprullarna 5' pa samma satt placerade efter matarrullarna 6', i matningsriktningen raknat. Av fig. 1 framgar liven, att varje matarrulle och tillhorande hjalprulle ha sina Mat rotoraxeln vanda, mot en stock ingripande ytdelar belagna i ett gemensamt, med frammatningsriktningen parallellt plan. In Fig. 1, which mainly serves only to show the location of the feeders in relation to the debarking machine, it appears that an auxiliary roller 5 is placed between each feed roller 6 and the debarking rotor 7 at its feed end. At the discharge end, the auxiliary rollers 5 'are placed in the same way after the feed rollers 6', in the feed direction straightened. Fig. 1 shows the web, that each feed roller and associated auxiliary roller have their Mat rotor shaft vanda, against a log engaging surface parts coated in a common plane, parallel to the feed direction.
Fig. 2 visar ett s. k. triangelmatarverk bestaende av Ire symmetriskt omkring rotoraxeln anordnade matarrullar 6, vilkas har ej synliga axlar aro lagrade I svangbart monterade kapor 8, som aven omsluta erforderliga drivtransmissioner, sasom exempelvis visas i fig. i det amerikanska patentet 2 857 945. Kaporna 8 aro fOrbundna med varandra medelst havarms- och lanksystem 9, 10 pa sadant satt, att matarrullarna svangas samtidigt lika stora vinklar mot och fran rotorns centrumlinje. Hjalprullarna 5, vilka pa samma satt som matarrullarna 6 foretradesvis d.ro utbildade med taggar eller rafflor, ha sina axeltappar lagrade i hylsor 11, som aro utformade i ett stycke med av kaporna 8 uppbuma delar. Konstruktionen visas i detalj i fig. 3. Fig. 2 shows a so-called triangular feeder consisting of feed rollers 6 arranged symmetrically about the rotor shaft, the visible shafts of which are stored in pivotally mounted caps 8, which also enclose required drive transmissions, as shown, for example, in Fig. 2, 857 945. The caps 8 are connected to each other by means of sea arm and link systems 9, 10 in such a way that the feed rollers are pivoted at the same time at equal angles towards and from the center line of the rotor. The auxiliary rollers 5, which in the same way as the feed rollers 6 are preferably formed with spikes or grooves, have their shaft journals mounted in sleeves 11, which are formed in one piece with parts supported by the caps 8. The construction is shown in detail in Fig. 3.
Matarrullen 6 är i det visade utfOrandet 2201 98 sammansatt av ett flertal olika delar, som ej torde behova beskrivas narmare. Det enda av intresse i detta sammanhang är, att den i kapan 8 lagrade rullaxeln 13 uppbdr en vid den.samma fastkilad trattformig del 14, som dels genom skruvar 15 fir fast forenad med rullens innerande, dels innanfor rullen är utbildad med en kuggkrans 16. En pa kapans 8 ytterande pasatt stodring 17 fir hopskruvad med ett kuggkransen 16 omgivande ringformigt lock 18, som har en radiell utvidgning 19 (se fig. 4), i vilken hjdlprullens 5 lagerhylsa 11 är utformad. Hjalprullens lagringsdnde är mellan tva kullager 20, 21 mitt for en sidooppning i hylsan 11 utbildad med en kuggkrans 22, och ett med de hada kuggkransarna 16 och 22 ingripande kugghjul 23 liar sin axel 24 lagrad i locket 18. Genom denna transmission drives ankh hjalprullen 5 frau. matarrullens 6 axel, och tack vare mellanhjulet 23 komma hada rullarna att rotera i samma riktning. Transmissionen är dessutom utformad att bada rullarna 5, 6 erhalla samma periferihastighet. In the embodiment shown, the feed roller 6 is composed of a number of different parts, which need not be described in more detail. The only thing of interest in this connection is that the roller shaft 13 mounted in the cover 8 carries a funnel-shaped part 14 at the same wedge, which is partly connected by screws 15 to the interior of the roller, and partly inside the roller is formed with a ring gear 16. A support ring 17 fitted on the outside of the cap 8 is screwed together with an annular cover 18 surrounding a toothed ring 16, which has a radial extension 19 (see Fig. 4), in which the bearing sleeve 11 of the auxiliary roller 5 is formed. The bearing end of the auxiliary roller is between two ball bearings 20, 21 opposite a side opening in the sleeve 11 formed by a ring gear 22, and a gear 23 engaging with the had gear rings 16 and 22 is mounted on its shaft 24 in the cover 18. Through this transmission frau. the axis of the feed roller 6, and thanks to the intermediate wheel 23 the rollers will rotate in the same direction. The transmission is also designed to bathe the rollers 5, 6 to obtain the same peripheral speed.
Hjalprullen 5 kan med fordel ha en diameter, SOM är mindre an 1/4 av )natarrullens (varvid taggarna i bada fallen dro inrfiknade), och dessutom bor den befinna sig sa ndra som mojligt intill matarrullen, sâ att dennas placering tätt framfor barlmingsrotorns inmatningsande ej hindras (se fig. 1). Idealet är, att hjfilprullen befinner sig helt innanfor en kvadrat, som omskriver matarrullens tvdrsektion, sasom visas i fig. 4. Ett sadant arrangemang underldttas, om de hada rullarnas periferiella racier av taggar enligt fig. 3 placeras i sick-sack i forlallande till varandra sa, att hjalprullens taggar ingripa i mellanrummen mellan matarrullens taggrader och vice versa. Uppfinningen är ej begransad till den ovan visade och beskrivna konstruktionen. Exempelvis kunna hjalprullar vara fordelaktiga ¥ vid matarverk, som besta av tva eller fyra samverkande matarrullar. Den beskrivna kugghjulstransmissionen kan ev. utbytas mot remdrift, i vilket fall melIanhjulet bortfaller. The auxiliary roller 5 can advantageously have a diameter, which is less than 1/4 of) of the natural roller (in which case the thorns are drawn in), and in addition it should be as close as possible to the feed roller, so that its position is close to the feed rotor feed end. not hindered (see Fig. 1). Ideally, the auxiliary roller is located entirely within a square defining the transverse section of the feed roller, as shown in Fig. 4. Such an arrangement is facilitated if the peripheral races of the had rollers of tags according to Fig. 3 are placed in a zigzag in line with each other. said, that the aids of the auxiliary roller intervene in the spaces between the tag degrees of the feed roller and vice versa. The invention is not limited to the construction shown and described above. For example, auxiliary rollers can be advantageous in feed mills, which consist of two or four cooperating feed rollers. The described gear transmission may. is replaced by belt drive, in which case the intermediate wheel is lost.