SE1551722A1 - Expandable tree felling wedge - Google Patents

Abstract

The present invention relates to an expandable tree felling wedge, comprising a guide structure (3) including two guide plates (30, 31) attached to a support body (33), a frame support (2) and a movable wedge body device (4) forming an activation means of the expandabl e tree felling wedge (1), said 50 wedge body-device (4) comprising a wedge body (40) that is located between the guide plates (30, 31) and a pushing member (41) attached to the back end of the wedge body (40), wherein that the frame support (2) includes a support tube (24) fixedly attached to the support body (33), enabling axial movement of the pushing member (41) and that the support tube (24) forms an anvil (27, 28, 29) for the pushing member (41) and the wedge body (40).

Description

1G 2G TITLE: EXPÄtNDi/ÅBLE TREE PELLING Vt/'EDGE 'HÉCH NICAL Pifitiï)The iiiveiition reiates to an expandahie tree feiiiiig *wedge interided to he inserted into a saiw ent to friree a tree in a desired. tiireetion during tree feiiiiig., BACKGRÛLTNDA tvnihiern with hithertfo know/ii feiiing wedges is that iknown designs are not always easily introdueed it into the kerf of a feiiing ent ritade hy a ehaiiítsattf.

For example frorn ilïE lífüfíiißlíifšštfl? there knowfn a feiiing wedge, tyhereiii the design stieht titat the jaøw tip portioii rnay not aivt/ays he unohtrfnsivtäiy introthietäti irtto a ent. Acontrihuting factor to this is that the hearing, arrangenient at the anvii at the wedge bodyeanses the 'tt/ridge, hody to iiave a reiatiyrziy' large *width at the iiaek wyhieht affeets the siritie angle of tiie *wfedge SUNih/izfäišï' (iii 'Hifi ïNVíïNïitfišNit is an objeet of the ifirfesent inyentitiii to provide an expandahie tree feiiing yvedge that inaysignitfieaiitiyf improve upon the above deserihed prohiern, vvhioh is achieved hy means of an expandaiaie tree feiiing *tyedge in aeeordaiiee *tvith ciaim i.

BRELEF ilëEíšCišifßïïfšN OF 'fHE FïíÉrUíšESin the foiioyvirig, the iiweiitiriri tviii he tieseiiitfitid in rriore tietaii *Vvitit rfzfkëriäiioe to the erteirised fi gnres, twfherein: Pig, i shotws a perspeetivtfi tfievt/ of an expandahis: tree feiiing wedge according to theinsfentiffin, Pig. 2 is a perspeetivtfi view of tiie otitei' parts of tiie tieviee shoyvn in Pig. i Eïïig. 3 shows a perspective view of a wedge hodyf as ttsed in Pig. i, and, Pig. 4 shows a detaiied *view of the front portion of an expandaiaie tree feiiing *tyedgeaeerirtíing to the iriyeritirin, and Fi *i shows a seetionai *vievv of a preferred enihodinieiit. 1G 2G Diiiflßiiisišli) DiÉlSCRiifififiN in fig. 1 there shown a perspective View of an expandahie tree feiiing twedge 1 according tothe iiweiitiirin. The tree teiiing tvexdgr: 1 crirnprises a twtätigtä unit 3 that includes tvwo guidepiates 3G, 31, that are fixed to a transversai support hody 33 i e. g. hy' iiieans of screws 36) andtäxttänti next to each other in the same direction to forrn a ttffztige-iikt: tanter tiortirirt. Tiie piates 31 are :nade of thin resiiient sriring steei piates, Which are arranged tvith hent frontportions 3Üßt, 31A, transitioning into snhstaittiaiijyf piani: paraiiei portions 3ÛA, 31x31. Theseportions 3GA, 31A are aisff: arranged with fiictiffm increasing nieinhers 32 (pretferaihiy in theforin of pnnched gaiiizys) that protrtide ttnttßvartiiy' front the piates., atiapted to interact tvitit the snrfaces of a cut to hinder' the vvedge i frorn siidiiig ont. .sites in Pig. 2 the: tratrisveiisai support iiody 33 itas a titrough iioie tittat is centeifed in reiation to a support ttthe 24, adapted for a pushing tube 41 of the tvedge body detfice 4.

As hest shown in Pigs. 1 and 3 the rnotfahie *wedge body device 4 fonns the activatitin rneansof the tfxpaittiahie tree ftfiiiiig sved 1. The wedge hody rievice 4 cornprises a sverige hody' 4Gthat is iocated hettveeii the piates 30, 31 aiid a tvnshing tnhe 41 that ihy rneans of a piate 44 andscrevvs 45 is fixediy attached to the hack end of the sved httdy 4G, Tite pnshiitg tnhe 41 isarranged twith an iriner threaded sieeiae rnenihei' 46 adjacent its ttpper end 41/3., Whichthreaded sieeve rnenihei' 46 (see 5) interacts With a threaded rod 23 to move the nfedge iiody 4G iieti/tfeeri the piates 31.), 31.

Accordingitl the rritäarts for tinsiiiing/puiiirtg the: tvtädgtä iiody' 4G includes a teirzscoiiirig unit23/41 ., Wherein the threaded rod 23 is arranged Within a protruding franie snpriort 2, that has asupport ttihe 24 extizritiiitg in a rearward dirizetion frorn the transvrfrsai support hody 33 in anoptiosite direction with respect to the extension of the piates 36), 31, tvherein the support ttthe forins a gtiidiz for rnoveniiäitt of the pushing tube 41» A nut 22 is rotatahie supported in the rear free end of the support tnhe 24 (see Fi S). 'fhe nut22 is tixetiiy' attachieti to the utvper end of the threztderi rod. 23, tyg, adiustahij; hy nteans of stop scretv/ s (not shown). “fhe threaded rod 23 is strpported, hy an anvii adjacent the tnttei' end of support tnhe 24-. 1G 2G h.) The ntit 22 is rotateti by hand by an tvperatiiig ineans 2G, 2i, 23, 25, 26, vvhich in thistarnhtitiiniierit inciudes a haiidie 20 pivotaiiy' attached to the nat 22 by nieans of iever rneniiier 21 attached to the hut 22 hy' nieans of serews 25, 26. ihest shown in Pig. 4 the tiat front area 31A that reiates to a iirnited distance X, of thepiates 3G, iii, are arrahgrsti vvitii frictiriii iricrtäasing iinernbtërs 32, tireferabiy' in the torrn ofpunched giils, traversai slots wherein the piate rnateriai on the front side of each siot has hetfn punched outwardiyf to forin a curved protrtrsion presenting griptaiiig edges. in Pig. 5 there is shown a cross sectional view of a preferred ernhodirnent of the invention,vvherein rnost detaiis have aiready heen expiained above and tiierefore niereiy sorne aspectswiii be exiiiained in niore detaii. it is shown that the pushing tube 4 i is arranged With an innertiireatirzti sieeve niierriiier 46 adiaetänt its upper end iiurtihtar it is siiovt/ri that the threaded rod 23is arranged vvitii an inner anvii part 27, in the forin of a ring tiiat is fixediy attached to the rod23, e. g. hy rneatris of a vvtëid 27A. An tiuter anvii part 29, in tiie 'forrn of a plate iiavirig acentral hole for the rod 23, is fixediyf attached to the outer end of the snptiort tube 24. Betweenthe inner anvil part 27 and the outer anvii part 29 tiitfre is airanged a hearing 28 that inay taltetrust ioad in hoth directions, ie. for pnshing and pniling. 'f he rint 22 is affixed to the rod 23 hyrneans of iiaving the scretv' eienient 26 for the iever part 2i passing through aiso the rod 23.Accordingly' the rotatahle ring 27, the iiearing 28 and the piate 29 forrn an anvii adjaeent the tanter end of the support ttihe 24, for the nfedge iaody 4G.

The irivention is not iirnited hy the above exarnpie hut rnay he vnaried Within the scope ofproteetiori tirzfineti iiy the ciairrrs, e. g. it tavidtaiit that the “basic advfaritagr: of the iriverititin.niay aiso he achieved hy' sinipiifying and havfirig the riushing niernher di in the forin of a rod,vvhere the tiireaded rod 23 pushes direetiyf on the tfnd of the pushing inernber, ivhtärtfbyf therear piate 29 could form the arivil. iffirivtßever a teiescopic arrangernent as described above ispreferred, due to cornpactness and easy to retrattt the pushiiig inernber éi-i. Ääiso stinitf other v'a.riati ons are evident for the sitiiled person vvithin the iieid.

Claims (8)

1G 2G CLiffiiihíS i. An expandaiiie tree feiiirig yvtitigtä, contprising a guide stifuctiire (3) iiieiiitiing two guidepiates (St), 31) attached to a support ihodyf (33), a fraine support (2) and a niovaibie 'wedgeiiody ritat/ice (-4) ftirntirtg an aetivatirin rneans of the fzxpanttiabitë tree tllziiirtg vvedge (i), saidtvedge body detfiee (4) etiniprisiiig a wedge hody' (46) that ioeated, ibetiyeeri the guide piates(fší), 31) strid a pushing niieiirttier (f-”i-i) attached to the back end of the ytffztigf: iiody (l-íti),eharacterized, in that the frame support (2) incitides a stipport tuhe (24) fixediy attached to thesupport body (_ 33), tfiítabiing axiai intivernent of the pushing inernher (íti) and that the stipport / tube (24) forms an antfii (27, 28, Zäll) for the pushing rneinber (di) and the wedge body (4-(3).

2. Expandabie tree tfeiiiiig wedge according to ciairn i, characterized in that said anyii (27, 28, 29) is positioned adjacent the outer end of the support tube (24).

3. Elxiiaridahie tree feiiing *wedge according to eiairn 2, charaeterized in that said anvii (_27, 28, 29) inciudes a heaiirtg (28).

4, Expandahit: tree feiiing yvedge according to any of eiaiins i-Éš, charaeterized in that thepushing nietnber is in the tforrn of a pushing tube (41) arranged With a threaded inner hore(463), prefterabiy in the forrn of a sieeve, cooperating With a threatitzd rod (_ 23), yyhereiii said pushirig tube (41) and said threaded rod (23) forrn a teieseotiirig cunit.

5., išixpantiahie tree ifieiiintg ytffztigf: aeerirtiintg to eiairn, 4, ciiaifaettërfizfztí in that a iiut (22) is fixediy attached to the upper end of the threaded rod (23).

6. Expandahie tree feiiing 'yvedge according, to any of eiainis i-- 5, eharacterized in that the support body (_ 33) has a througii hole (35) that is eentttred in reiation to the suppoit ttihti (24).

7. Expandahie tree feiiiiig yi/etige according to one of the preceding ciaiins, charaeterized inthat front portions (IiÜA, 31A) of said guide piates (39, 31), are arranged tyith tfrietioriiriereasing ineiniiers (32) that protitide outwardiy frorn the guide piates (39, 3 i), adapted to iiitfzract with the surfaees of a cut to hiiider the ifvtidgt: ( I) trorn siidiiig out.

8. Expandable trcc fcílíng *wcíígc according to Ltiainï 7, characlerízcií in Lhaï at ícast some af .f said. frictiaän íncreaß1fr1g menfners (32) 21111: in the íknfrn of punchcäai gaflevs. 9., Éixpanaiable tree ík>l1ing wxffzeigf: according u) claírn* 7 of S, chavracífßrizaad in íhati said fraæní portions (ÉOA, BLÅ) include subsïantiaïïy' planer parafleí porïions.