NO126289B

NO126289B -

Info

Publication number: NO126289B
Application number: NO711056A
Authority: NO
Inventors: Soeren Karstroem
Original assignee: Skogsdon Ab
Priority date: 1970-03-20
Filing date: 1971-03-18
Publication date: 1973-01-22
Also published as: FI47029C; FI47029B; SE346203B

Description

Trefelningsretter. Tree felling dishes.

Foreliggende oppfinnelse angår en trefelningsretter av den art som er angitt i ingressen til hovedkravet. Slike redskaper er beregnet til å brukes for ved felling av trær å bringe treet til å falle i en på forhånd bestemt retning og derved forhindre skade ved treets fall mot bakken, The present invention relates to a wooden cutting board of the type specified in the preamble to the main claim. Such tools are intended to be used when felling trees to cause the tree to fall in a predetermined direction and thereby prevent damage when the tree falls to the ground,

Trefelningsrettere som består av en stang som er anordnet for ved lengdeforlengelse ved hjelp av en donkraftlignende hydrau-lisk sp ennanordning å innspennes mellom et punkt på bakken og et punkt på trestammen er kjent for. Trefelningsrettere av denne art er relativt tunge og klumpede, samt dessuten kompliserte og derved også kostbare i fremstilling. De har forovrig også en temmelig Tree felling straighteners which consist of a rod arranged to be clamped between a point on the ground and a point on the tree trunk during length extension by means of a jack-like hydraulic tensioning device are known. Wood-felling straighteners of this kind are relatively heavy and bulky, as well as complicated and therefore also expensive to manufacture. Incidentally, they also have quite a few

begrenset slaglengde. limited stroke length.

Hensikten med foreliggende oppfinnelse er å unngå de ovennevnte ulemper og dette oppnås ifolge oppfinnelsen ved hjelp av en trefelningsretter som omfatter en stang eller lignende som er beregnet til ved trefelning å bringes mellom et stottepunkt på bakken og en trestamme, og det karakteristiske består i at den for anlegg mot trestammen beregnede ende av stangen er forsynt med en ved hjelp av en hevarm påvirkbar trinnmateanordning, omfattende to vekselvis for inngrep i trestammen anordnede gripeorganer, ved hjelp av hvilken trinnmateanordning nevnte ende kan bringes til trinnvis å forflytte seg nedover langs trestammen. The purpose of the present invention is to avoid the above-mentioned disadvantages and this is achieved according to the invention by means of a tree felling straightener which comprises a rod or the like which is intended to be brought between a support point on the ground and a tree trunk during tree felling, and the characteristic is that the the end of the rod intended for contact with the tree trunk is provided with a step feed device that can be influenced by means of a lifting arm, comprising two gripping devices arranged alternately for engagement in the tree trunk, by means of which step feed device said end can be brought to gradually move downwards along the tree trunk.

Oppfinnelsen skal i det folgende forklares nærmere under henvisning til tegningen som viser en utforelsesform for trefelningsretteren ifolge oppfinnelsen. The invention will be explained in more detail in the following with reference to the drawing which shows an embodiment of the wood folding straightener according to the invention.

Fig. 1 viser et skjematisk sideriss av trefelningsretteren i arbeidsstillingen og Fig. 1 shows a schematic side view of the wood folding straightener in the working position and

fig. 2 viser en ytterligere bruksmåte for den samme. fig. 2 shows a further method of use for the same.

Trefelningsretteren består av en stang 1 som i den nedre enden er forsynt med en stotte- og gripeplate 2 som er leddet eller fast forbundet med stangen. Stangen kan eventuelt være utfort i to deler som er teleskopisk sammenskyvbare eller ved hjelp av en ledd-anordning sammenfellbare, samt ved en låseanordning innbyrdes fikser-bare i utskjovet resp. utfelt stilling. Stotte- og gripeplaten 2 kan rundt omkretsen være forsynt med gripeinnretninger 3 eller være ut-formet på annen måte slik at den ved redskapets bruk bringes i inngrep med bakken og derved hindres fra å gli på denne. Stangen 1 er i den 6vre enden forsynt med en trinnforskyvningsanordning, bestående av to gripeklor 4, 5 av hvilke det ene 4 er anordnet på en hevarm 6 som ved hjelp av en tapp, bolt eller lignende 7 er dreibart forbundet med den ovre enden av stangen. På hevarmen 6 er en svingarm 8 dreibart festet ved hjelp av en annen tapp eller bolt 9 og denne sving- . arm bærer i sin frie ytre ende det andre gripeorganet 5« Begge gripeorganene er rettet i samme retning, nemlig oppover, slik at de er virksomme i samme retning. The wood-felling straightener consists of a rod 1 which is provided at the lower end with a support and grip plate 2 which is hinged or firmly connected to the rod. The rod can optionally be extended in two parts that can be telescopically pushed together or folded by means of a joint device, as well as mutually fixable by means of a locking device in the extended or posted position. The supporting and gripping plate 2 can be provided with gripping devices 3 around the circumference or be designed in another way so that when the tool is used it is brought into engagement with the ground and thereby prevented from sliding on it. The rod 1 is provided at the upper end with a step displacement device, consisting of two gripping claws 4, 5 of which one 4 is arranged on a lifting arm 6 which is rotatably connected to the upper end of the rod by means of a pin, bolt or the like 7 . On the lever arm 6, a pivoting arm 8 is rotatably attached by means of another pin or bolt 9 and this pivoting . arm carries at its free outer end the second gripping device 5« Both gripping devices are directed in the same direction, namely upwards, so that they are effective in the same direction.

Ved bruken av redskapet plasseres stangens nedre ende med stotte- og gripeplaten 2 på bakken et stykke fra det tre som skal felles. Stangens ovre ende helles mot treet, slik at gripeorganene 4, 5 ligger an mot og griper inn i trestammen 10, slik som det fremgår av flg. 1. Hevarmen 6 svinges deretter frem og tilbake omkring sin tapp 7» Ved hevarmens svingning utover-oppover regnet fra stangen 1, presses gripeorganet 5 inn i trestammen 10, gripeorganet 4 glir derimot i retning nedover langs trestammen. Når hevarmen 6 deretter svinges innover-nedover, griper gripeorganet 4 inn i trestammen mens gripeorganet 5 glir nedover langs trestammen. Ved gjentatt svingning av hevarmen på denne måte vil gripeorganene trinnvis bli fort ned langs trestammen sammen med stangens 1 ovre ende. Trestammen 10 presses derved mere og mere til siden i retning bort fra trefelnings-retterens'stottepunkt mot bakken. Dersom det i treet er gjort et snitt med tilstrekkelig dybde, kan treet således lett bringes til å falle i onsket retning. When using the tool, place the lower end of the pole with the support and grip plate 2 on the ground some distance from the tree to be felled. The upper end of the rod is tilted towards the tree, so that the gripping members 4, 5 rest against and engage the tree trunk 10, as can be seen from Fig. 1. The lever arm 6 is then swung back and forth around its pin 7" When the lever arm swings outwards-upwards counted from the rod 1, the gripping member 5 is pressed into the tree trunk 10, the gripping member 4, on the other hand, slides in a downward direction along the tree trunk. When the lever arm 6 is then swung inwards-downwards, the gripping member 4 grips into the tree trunk while the gripping member 5 slides downwards along the tree trunk. By repeatedly oscillating the lever arm in this way, the gripping means will gradually descend along the tree trunk together with the upper end of the rod 1. The tree trunk 10 is thereby pushed more and more to the side in a direction away from the tree felling straightener's support point towards the ground. If a cut of sufficient depth has been made in the tree, the tree can thus easily be made to fall in the desired direction.

Svingarmen 8 er forsynt med et ekstra gripeorgan -11., som er rettet i motsatt retning av gripeorganet 5* Retningen på gripeorganet<;>ll er slik at det ikke hindrer gripeorganets 5 vandring nedover langs trestammen. Det ekstra gripeorgan 11 er i stedet beregnet til å muliggjore bruk av redskapet som vendhake.. Ved .å fore svingarmen 8 utover til en stilling som fremgår av fig,. 2, kan gripeorganet 11 -bringes til. å gripe fatt i f. eks. en på bakken liggende stokk 12 for dreining av denne, The swing arm 8 is provided with an additional gripping member -11., which is directed in the opposite direction to the gripping member 5* The direction of the gripping member <;>11 is such that it does not prevent the gripping member 5 from traveling downwards along the tree trunk. The additional gripping member 11 is instead intended to enable the tool to be used as a turning hook. By moving the swing arm 8 outwards to a position shown in fig. 2, the gripping member 11 can be brought to to grasp e.g. a stick 12 lying on the ground for turning this,

Svingarmen -8 kan eventuelt være anordnet for ved hjelp av en f.eks. omkring tappen 8 viklet fjær 13 holdes innfelt mot gripeorganet 4 med -et hensiktsmessig trykk. Dette kan være Snskelig for. The swing arm -8 can optionally be arranged for by means of an e.g. spring 13 wound around pin 8 is held flush against gripper 4 with an appropriate pressure. This can be good for.

å lette redskapets håndtering ved transport og for å minske faren for ulykker. to facilitate the tool's handling during transport and to reduce the risk of accidents.

Claims

1. Tree felling rights, comprising a pole (l) or the like which is intended to be brought between a support point on the ground and a tree trunk (10) during tree felling, characterized in that the end of the pole (l) intended for contact with the tree trunk is provided with a step feeding device (4-9) actuated by means of a lifting arm (6) comprising two gripping means (4,5) arranged alternately for engagement in the tree trunk (10)j by means of which step feeding device said end can be brought to gradually move downward along the tree trunk.

2. Three-felling rights according to claim 1, characterized in that one gripping member is arranged on the lever arm (6) and the other gripping member (5) is rotatably connected to the lever arm swing arm (8).

3. Tree felling rights according to claim 2, characterized in that the gripping means (4>5) are made of points, claws or the like which are directed in the same direction..

4. Tree felling rights according to claim 2 or 3, characterized in that the swing arm (8) is arranged to be influenced by a spring (13) in such a way that the swing arm's gripping member (5) is kept in contact with the tree trunk (10) during the movement.

5. 'Trefaction rights according to claim 2,3 or 4, characterized in that the swing arm (8) is provided with a further gripping device (11) which is at least approximately directed in the opposite direction to the gripping device (5).

6. Tree felling rights according to one or more of claims 1-5" characterized in that the end of the rod which is intended for support against the ground is provided with a support or grip plate (2).