CA2119305A1 - Implement for removing weeds from areas such as paths, squares and parks - Google Patents

Abstract

ABSTRACT
The invention relates to an implement for removing weeds from paths, squares, parks, etc., which in particular have a covering of gravel; chip-pings, sand, etc. The implement has an implement carrier with at least one movable component, on which is mounted at least one tool to be brought into contact with the ground. So that the implement has a high cleaning action, whilst causing only limited damage to the ground, the tool has a shoe-like base part, which has blades on its leading edge pointing in the travel direction and on its lateral edges and with which it at least partly pene-trates the ground and that the tool performs an oscillatory movement sub-stantially directed transversely to the travel direction. The tool can be downwardly inclined in the travel direction. The base part is substan-tially plate-like and the blades are formed by the downwardly curved marg-inal areas of the base part.

Description

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IMPLEMENT FOR REMOVING WEEDS ~CM ~REAS ~X~I A~ CU~RES ~ND P~RKS

The invention relates to an implenent for r~lk viny we~is fL~ patlIs, ptlrXs, squares, etc., whic~ in pdrtic~llar ~ve a c~v~1iny of sa~t, gravel, s~ingle, etc., with an ~nplenent c~rrier l~ving at le~Is~ ~YIe nK~tI~le CUI~ t which is mcunteA at ~east (~e tool to ~e bn~l(3ht into ~tdCt wi~h the gr~md.
, In areas of the af~r~w~tl~at t~pe ovcr a peri(xt ~imu wu~is yn~ and lI~l~t be r~noved at reguldr intervul~. Recently use l~s l~en mtxte cf ch~nical eradicating ~gents for this purpose or the weects have be~ ~In~t off, but at present both these proc~tures ure forbi~ten in the ind1lstrial and m~mic-ipal sectors.

Therefore impl~nents for removing weeds have been developed, which have rotary brushes enabling the weeds to be to m ~It. Another ca~struction has a rotating wonm or screw arr~nged at right ~lgles to the implenent travel direction and whicll penetrates to a certaill ext~t into tl~e ground. How-ever, the aforenentioned implenents le2~t to the disadvantage that they scatter and displace to the side the upl~er ~il layer, so that subseguent work is necessary to a significant extent. Tn ~t(titi~n, the cleaning capa-city of said implen~lts is not ad~ldte.

German patent 356 512 disclo ~ d we~ C~ n~t, w~icI) Ilas d plIlr-ality of knives, which can pass belaw ~he s~ fd~:e -f the 9L~Ind. If the implement is moved, the h~ives are al~ clispld(~I, so t~t the wee~s are cut off. However, it l)as been found tlld~ SU~II dl~ lanent has a very limited efficienc,~.

DE-A-32 11 152 discloses the fitting of severdl t(x)ls in the fonn of knives to a ccmnon tool carrier. The tools enter tl)e st)il an~l the tool carrier rotates. Hc~wever, such a procedure c~rns l~p ~he sl)il sllrface to a significant extent, so that much subsequent work is r~lired.

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The problem of the invention is to provide an i~lenent of the aforenen-tioned type, which eliminates the disadvantdge~ of the hitherto knc~n implement~ and in partic.~lar ensures d l)i(JII cleanilIg action with only . ~

limited damage to the soil.

According to the invention this problem is solved in tlldt tlle tool has ~
shoe-like base part which at it~ lec~iing edge Ix~inting in tlle direction of travel and on its lateral edges has blades Wittl wl)ich it dt ledst l~rtly p~letrates the g1~ i t~dt the tot~l perf>-l1~ cul-~;cillatin~3ll~vanent sub tantially at rl311t cul31e~ to the dlrection of ~rlv~

Curing operatlon the blades of the s~e-like basc part pass below the top layer of the surface to be worked. The movement of the base part trans-versely to the travel direction can be achieved by a linear oscillating movement or by an oscillating pivoting. It has proved adequate to use a frequency of approximately 400 min 1 Preferably the oscillating movement - of the tool is achieved in that the conponent m~lnte~ on the implement bcdy t is moved backwardct and forwards substantially transversely to the travel direction. The blades of the shoe-like base part tear ~It the weeds with-out cutting off the same. The weeds are thro~n up to the surface whereas the gravel sDnd etc. imnediately drops down agdin so that a separation is obtained due to the force of gravity.

Preferably the tool iR downwarcily incli1l~ in ~h.~-~ire~ l >f trlvel so thdt this ensureR d rel{dble pelletrdl~{t~ lt` l.ot~ )t~ :ioil.
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According to d preferred developnent of the inven~itn tl)e hdse plrt i~ sllb-stantially plate-like and the blades dre fonn~l ly ~ wa~ily b~nt n~rgind-portions of the base part. Belcw the plate-like ~e p.~rt c.~ ~ fonn~i d cavity bounded by the downwardly bent mdrgin.~l dreds. ~s a re~nlt the ~lu~e-like tool has a concave constmction. The bdok of ~he ~ool is not bent downwards and is therefore open. The bladei~ cdn dlso 1~ constm ~ted in such a way that they are fonned by edges tapering forwdn~ tt~wards one another e.g. at an angle i.e. have d tridn~llar ~o dr~lclte configurc~ti~n said cutting edges being connected via a connecting dred to the reciprocd-ting component.

The shoe-like tool can be in the fonn of a sp~de wl~se c1rvat~lre is direc-:`
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~;t ted upwards, or a corresp~ding shove1. It is c~ sil)le tt? have a nose or claw-like canfigurdtion or to ~ve a bl.~lc knit`e or ~crc~l?er sl~pc. It C~) al80 be curved ulward~.

In plaee of a plate-like l)d~e part with dc~nw~-~1y r~llv~ll~t~3ina1 areas it is also possib1e to use a so1id e~x~lent witl~ lcll?erin-3 l~tercl~ 3es.

It has also provod c~vantagea~s if the ~urfcdces ltxat~d ~?etween tlle cutting edges are large than the cross-section of tbose connecting areas of the tool by means of whieh said tool is connected to the reciprocating component. This prevent~ clogging by tlle weed~ renoved fran the ground on which, apart fran the roots there is also the soil attached to the latter.
It has proved advantage~s to have widtl~ of betwet~l abalt 2 and lO an and lengths of between about 2 and lO an c~vdntagt-x~lsly between 3 and 8 an.

Appropriately several tools are ~uxtapose~ in dt le~t ~)e row substan-tially transversely to the travel or movt3n~)t diL-et:tit~l. The tools should have sueh a reciprocal spacing that the movt~net~t l~itl~ of two adjacent tools overlap. It is partieularly advantageolls if two L-OWS of tools are provided in space~ successive manner. The t~)ls of the fr~t rt~w can rot-ate in the opposite direction to the tools ~f ~he re.lr n~w. In or~el- to l~
db1e to carr~ out preworkit)g with tlle t~x~ )f ~h~ Fr~ t r~ cllld ~ find working with those of the rear L~W, the t~x~ls (-f ~lle flx~ll r~ ll) hav~
different eonstructiQn to those of the redr n ~.

All the tools of one row cdn be fixed to d r~`il)r~X:dtill-3 beclll 0L' ~le or more tools ean be fixed to its own recipr~:dting ~dn ~r lever. In the ca~e of the last~nentione~ embodiment, it can 1~ appropriate if in each case two ad~aeent tools are provided in each cd~e pdirwise on one lever which acts as a d~tble-armed lever and is pivotdble about an axis approx-~nately perpendieular to the surfaee being work~d so that both a pair of tools of the front row and a pair of tools of the redr r~ are provided on said lever and the tool~ perfonn an areuate piVOtillg Particularly in the case of imple~ ts where there dre more than two too1s in a row it ha~: Irov~d l)drtic~ldrly a~lv-mtay~)us i~ e~1Xt~ t~e tot)l ù~stead of being riyit~ are displdce.lblc rt l lt ive l~ n~nt: unl~ol tlle lever and/or the l~e~in. It is also lx)isi~)lt! f-)r ~In~ n:; r l~vt!t~i lo WlliCIl are fixed olle or more t(x-1s to l)e ~lrr<ll-3~1 s-- lS l-- l~ lisl)lacell)le or pivotdble relative ~o ~h~ lanetlt or ~ olh!l c~ x~ncl~s lo whic~ tlle levers beams or the 1ike are fixe~l. In this W~ly lhe l-x~ls c~m c~lpt to t3r~md unevennesse~. I re~erdl)ly the iml)lttinent ~rill~iel` C~ )l iSt-! i sever.il ortions which are l)ivotdble relative ~:o ~ne dnotllel anl which dre t~ijust-able in po-ygon-like mdnllt r. As a re~u1t t:he il~lt~mw~t cdrritr can l~
a~apted to the profile o f a path to be worke~i.

The too1s can be height-adjustdble with resl)ect to the reciprocating cal~-onent e.g. a reciprocating be~m. The reciprocdtillg c~ponents can also i; be height-adjustab1e. It is also possible for tlle t: ols with respect to the reciprocdting calponents or the cai~x~neilts witll rt-~ il~ct to the ilr~ le-ment to oscillate or tilt trdnsverse1y to the mvall~ilt ~lir~tion thereof.

`~ It can be advantageous if tl~e (lisl)ld :t .-1 le ~(x)ls r recil n~atillg ca~ on-t~ts are urgeci in the direction of tllt ~rAIllt~ y rri lx~er i~-rcll3e Ineani or dccl~ 1ator wllicll t-n illrt s thclt a sl~ ic pl`t!`i`illl`~ i!i l:X(~l`t~l t)ll Llle working surfaces of the t(x)l~ tl~c~ bl Ille~ n!ll.ll-~ lll.e yl Ull~l us nnif-cinnly as possib-e. ~s a flln(:tion oi wllt~ l tll! tntir~ r~ x:.lt:int3 ct~n-ponertt oroin1y the ttx)l is kt~t t~isplcceal~le~ ll r ~spect to the i~ nent it can be appropriate for either tlle rtcil)l x:~ltin(~ c(~n~nenti r tlle ttx)lsto be subject to t~e action of the a~ tor. Tllé latter can be consti-~-~ tuted by a weight e.g. an aAditional weit3ht ( r the weiyht of the recipro-cating ca~nents or d sprint3 cwl l~ pn~vilt~l. rhe act~ul~ tor Ctlll al:;o function with a pressure mediwn e.g. witl~ d ~ tlrdlllic In~ilDn or c.m l~ con-stituted by a hydrdll1ic Ir~tor.
' When usint3 double-ann~ 1ever~ as tlle c. rrit r f- r in e ICIl cc1~e a pdir ()ftoo1s of the fr~nt row and a pair of t(x)l~ of t:l~ l`edr rth~, it cdn be appropriate for tl~ pivot pins of tlle Itl~el llly o~ler lever of the ilnl~le-ment to be mounteA in fix~d mdnner oll tlle t.l:;inl~ In1 ~lle intenlediate do~lble-amled l~vel~; dl't~ mt~lllted :it) ~ t~ lt iV-~ )ldCedblt' Wi~

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respect to the implement, The arrdng~~ c~n ~ ~uo~l tl~t one of tl~e d~lble-anmed levers, e.g. one of tlle c~ter leve~ drivell l>y ao oxcil-lating drive of the i~ nent, tle oscillatillg m)v~lt ~xeiny trdllsferr~t via a ccupling to the other lever. The c(~lplill-3 c.m ~ ec~titut~l ~ a cdble tensioned betwe~) the levers, d linkage )r ~I hydralllic sy~n. It lso proved ~lvw)t,lg~l~ if the d(~ble-ann~ level ~X)siti(~ etwe~l the two outer d~lble-am~d levers is ~tlided in a fr~ely oscillatill~ mner ~nd is supported al the implan~)t ~y n)e~u)s of ~ llator.

Furttler details and te~tureY of the inventi~l C~l le gathere~i fran tlle following description of anbcdiments with refer~nce to tlle attache~t draw-ings, wherein show:

Fig. 1 An im~ t in elevation.

Fig. 2 The ilq~le~ t acco~iing to fig. 1 in pldn view.

Fig. 3 A larger-scale view of section 1[1-111 of fi9. 1.

Fig. 4 Secti~) IV-IV of fig. 3.

Fig. 5 A larger-Ycale vi~w ~f s~ti-~l V-V i Fig. 6 Section VI-VI in fig. 4.

Fig. 6a A part ~ectional view of fig. 6.

Fig. 7 A larger-scdle view of secti(~ VII-VII in fig. 2.

Fig. 7a Section VIIa-VIIa in fig. 7.

Fig. 7b A view in the direction of arruw Vllb in fi(~. 7a.

Fig. 8 A larger-scale view of secti(~) VIII-VIII in fi~. 1.

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Fig, 9 Sectiotl ~X-IX in f i-3. 8.
., Flg. lO A largt!L~ le view of ~red X i,~ 3.

Fig, lOa A view f~n the dirætioll of arl~ X~l.

Fig, 10~ A view fran tlle direction of arr~w Xt~.

Fig. 11 A view of ~ectic~n XI-XI in f ig. 9.

Fig. lla A sectivn XIa-XIa in fi(3. Il, Fig. llb A section XIb-XIb in fig, Il, t r Fig. 12 An inplanent dccording to d fUrttlel- dlllX~3ilTk~lt in elevation ~nd half c~vereti, Fig. 13 A plan vie~ of the in~)lt3nu)t ~Ic~ iin-3 ~.~ t`i~J. I2.

Fig, 14 A section XIV-XIV of f i-3. 1:3.

Fig. 15 A sect i~lll XV-XV ot f ig . l~ .

Fig. 16 A section XVI-XVI of fiy. 15.

Fig. 17 A view fr~n the directiol) of arn~ XVI 1 in Fig. 13.

Fig. 18 A larger-scdle view of the C~lttil)13 wheel in fi-3. 17.

Fig, 19 A side view of the CUttillg wheel of ~i~3. 18.

Figs. 1 and 2 sho~ an ilr~lanent I for r~n~vi~ wc~3:;, wtlich is fittetl ~:o the front area of a per se knvwn auttmotive single-dxle tractor steerable by means of spars and which has an ann 2 ~ul cl r~d~y-driven driving shaft 3. The driving shaft 3 drives ~ gear locdtt~ in .1 (`d!iill9 4 and which by means of a crank gear 5 gives d l~tckwdnlS at~ `olw.ll~ls or r.~iprocdting move~ent to a connectillg md 6. The drivill~J ~b.tf~ -f ~ gear l~x~ate~'3 behind the re~re~ent~d ttrea of the drivin~ tt~ ~3, tlle 11~ , tl~ ~pdrS
and the driving wheels are not sl~wn. The dire~tiln oF trt~vel is design-ated A.

Ar~md the casing 4 is fixe~ a fran~ 7, which c(~l~)rist-~i k~wer brttc~et~ 8, 9 snd an upper brdcket 10, ste~dylng ~tn~ts 11, 12 antl cross-c~nnecti~Yls 13, 14~ The fr~ne 7 extends substantidlly perpendicuk~r to the travel dir~c-tion A.

On the lower brackets d, 9 a d~3ble-dnnL~ levtr 15, 16 is pivotably fixed to the sides of the implenent by me~s of in eacll cc3se one bearing blt~k 18, 18a. The bearing block 18, which is sht~ in ~3r~tter detail in fig. 5, oontains an upper and a lower bearing llolder 1~, 2n Witll in each case one antifriction bearing 21, 22 by means of whioh c~ sl~ift 23 is pivotably l~m-ted in the bracket 8. The bearing block 18a i~ e~Yljln~oL~l for a shaFt 23a cn the other side of the implement anA l~s a 1~ 3~ls c~l~tmction to the bearing block 18.

Each of the double-anmed levers lS, 16 hdS a~ it~ l'rln~ ~A a b~lsh 24, 24a and at its rear end a correspcn~ing l~lsll 2'i, ~ia, as e~u~ 1~ gatllere~ for lever 16 in conjlmcti~Y~ with fil3s. 3 al)d 4.

As can be gathered fran figs. 6 and 6d, by m~uls of tlle nlb~r bedring 26 the bush 25 engages r~ md a flange 27 of a ~r 28, which is tllerefore angularly movable with respect to the h~sll 24 alld tlle do~lble-anned lever 16. A bar 28, 29 or 28a, 29a i8 m~nte~ or 1l~]-l in t~ way ill ea(:ll of the ~Ishes 24, 25, 24~, 25a of the ~Iter d~ll)le-anl~l levers 15, 16.

Cross-braces 31, 31 or 30a, 31a inter~ ect Lh~ Iklrs 28, 29 or 28a, 29a, so that in each case is fonn~d d frane 32, 32a ~.9. pivotable ab~t the shafts 23, 23a in accordance with tlle arr~ws B, B. By means of a nlbber bearing of the bars 28, 29, 28a, 29a is fonn~l a l)ivotable or oscillatahle i;

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nYlmting support f~r tlle ~rane-~ 32, 32a in ~Ircollt~llle~ Wi~ he ~ll`L~ ~, SO
~l~t the tool 60, 61, 62, 63, 64, 65, 66, ~7, ~)n~l, fil~, h2~1, 63c~, 64a, 65~,fi6a, 67a fixed to the ~ral~ 32, 32a c~ a~.lpt t.~(JI(~lnd ~Illevalnesses.

~etween two dt~lble-allll~l levers 15, 16 or ~he Irc-n~:; 3', 32.~clre l~rovid~Yt ~w~ f\lrther dalble-dml~l lever~ 33, 33d, w~ic~ e tu(~ llld re~r e~d in cd~e cdrry ~ t~)f t:~ n~u-~rd(:c~ 3~, 35 (~ ')d, ~IS C~ el~
nction wi~ v~l~ 33~ J~. fl ~ ` tl~ v~l~ 33, 33a carrie.~ at it~ fr~ n~l redr t~ld ~ l~lsll 3fi, 37 o- 36~, 37a. The frdne~ 32, 32a or tlle d~lble-ann~A levers 16, 1~ ~llso edrly ~Ishes 38, 39 or 38~, 39a.

As stated, on the crc~lk get~r 5 is fixeA one t~d o~ the c~nnecting rod 6, the othér end of the latter being articllldtt~l by me~ns o~ an articulated connection 6a to the dt~Jble-anned lever 16, so ~htlt ~lle oscillatin-3 move-ments of the crank gear 5 are trans~erred to the lever 16 or the frane 32 and pivoting mcvt~nents in accordance with tlle ~rr(~s B dre produced.

By means of a clanping connection 41 a cable, dpl~n)l)ridtely a wire cable 40 is fixed to the bll~h 38. The cclbte 40 nlns to ~h~ l~lsll 36, wraps r~lnd the latter (the cable is fixe~ to the l~sh by n~c~s I)t a cl~lnpin-3 conllectit~l 42), passes to tlle hlsll 3fid to WlliCI) it is S~ y ~ cll)S of d Cl~llq)illl3 connection 43 and ~r(m Lhel~ vi~ d tellSi(~l 'ipl ill~J ~ o 13le hlS~) 3a, to which the cable ~0 is fix~1 by medlls o~ c~ e(~ s gathered from figs. 7, 7a c~d 7b.

l`o the bush 39 fixe~ t() the redr ~n~ of tlle .1l~ ll~l lever 16 is sec~red by means of a clal~)illg c(~nectil~ -nll~le ~7 ~11, ~Icc(~ nli~ hy the interposing of a tension spring 48, it pctS~'S It~ln-l the I~ISh 37, Lo which it is fixed by me~s of a clal~)int~ c~ul~lioll ~ `r-~n the hlsh 37 it runs to the bush 37a to which it is se~lre~ l-y Ille.~ls at a clanping colln-ection 50. The cable ~7 wraps ralnd the hlsh 37a ~ld nllls Eran there to the bush 39a, to wllich it is also secure~ by me~s of d clanping connection 51. The guidance of tlle clble ~7 in tlle vicinity It tlle clnn 33a can be gathered fran figs. 8, 9 and 10.

L3y m~c~ns of t~e ~<11)1e ~) ol~ ~7 111)(~
t~e lever 16 i~ds~e~ t~ 1)iVt 1~ 3 1~ U1~Y~t i1~ 3.111~
B to the ot~er levcts 33 33c3 15 ~o t~ ]1~ vt~rx 1~ 33 33a cnnl 1'-are t~Jple~3 to one <uIothcl.

W~lerea~ the dt~blt~ tY3 It~vt~; 15 c~3~3 1~ e 11k)111~ 3 t)t~ fl:~ ~3 t~ 3 ~` 23a the furtller 1ever~ 33 33a are not m~l1It.~ 1 Illt-~ sl~ft 73 cmd ''3a an(3 are instead lleld solely by tlle cable ~() 47. In colI1lectioll ~ith the XIIS-pended levers 33 a~ld 33c tlle guidance of tlle c ~I)Ie 40 or 47 is chost~I in a1ch a way that the cable 10 running ~Wcl1~35 ~he l)~sh 36a fran tlle Ieft-hand side in fig. 8 enters frr3n above pc~sst s L~ulld tlle L~ISI1 36a a31d leaves it below the entering cdble area. In the (:~3~ie ot` the other huslI 37a the t3uidance of the cdble 47 caning frtm the left ~c ke~s place to the busll 37a arolmd which it loops ~1n(I tht-tI pd~ i vi~ t1~ in~3 end to t11~ 1~1lih 37 of the other lever 33.

11~ e C~l~t~ t)t` 1t~v~ t! tJlliA~ t.~ 1() tll~ kt~
the same way i.e. tht-~ c~lble 40 n1n s dS ill ~ 1xe ot tht! lever 33a cni1~g fmn the left Fr(m dlx~ve on1:-) 1.ht 1~1sh 3l. It~s the 1at::er ~lnd then runs out dt t11e ~ottt~n. In ~ e c.1xe ~t lh. 1uxll 37 ~lf t1n~ 1twer 33 the cable caning fn~n tlIe left t~1:erx 1h~ 1ld frt~ vt~ 1~ax~es a1t to the right to tlIe ~pring 4R.

AccaTpanied by the interposing of in e~lch c~l~e ~-ne sul)1x~l-t or bedri1Ig spring 55 55a the levers 33 and 33a dre X ~ )L-~t~ 011 the k~wer brdCketS
a, g and as a result of the gui~dnce by 11~iU1S of tlIe cdble are vdridble as re~3ards height and lateral positial so tl~lt ~hti~y Cdll more easily and effec-tively compensate gn~lnd Imevennesses.

In each case d pdir of t(x)ls 60, 61, 6~, 63; 6'~1, fi~3~1 ~uld 6().1, 61a is fiXt~
~`~ to each of the dt~lble-~lnnt~3 l w ers lS, 16, 33, 3:3cl~l the lec~in9 end in tlle direction of travel A, i.e. in t:lle Ir~lt ~ 1. In tl~e redr r(~ ~2 the tool 64, 65, 66, 67, 66a, 67d antl 64c~, 65.~ ~r~ fixe~.
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Each of these sl~e-like ~x)~s, whereof lhe L(x-l i3cl sl~7~ fig. 9 is ~, ~ , - In -described relative to figs. Il, lla ~uui 11~ s .I sul)staIltially p1cIte-like bdse part 63b, whose f~7nt area 639 an~i its l.Iter~ re<l C3d dre Ix~nt dt~l-wal~ls, so thdt ~10w tI11! 1>ase 63b is fo~ln~I a C.IVity 6`~c 1x~und~;i 1)y theci~lwnward1y curved ar~as 63d ~)d 639. The 1kIck of ~he 1~Ist~ I)art ~Ih is l)el~t ciownwards, so tllat ~he CclVity 63 is 0~1 at: t~I~e re,Ir. 'I`I~e wlcls of tI~e (i(7~
wardly bent areds 63d wId 639 fonn ~)1t~ie-like cOnto~ s dirt~t~ r~an~s tI~e gr~md, which both in t~ case of a mov~3n~t of ~h. veIIic1e in t~ravel direc-tion A and when perfonning the pivoting move;~1t B pt~1et:rdte the ground and scrape the weeds out of the ground by mecuIs of the eciges rotating on three sides and convey ~:aid weeds upwarcis.

The plate-like base part 63b i~ connected by me~uIs of cl conIlecting web 63e to a half-shell 63f by mealls of which the t-x71s 63 are fixed to tl1e bars or cross-braces 28, 29, 34, 35; 4a, 35a, 29d, 28cl.

As can in particular be gathered fran fig. Ilb, tI~e plate-like base part 63b of the tool 63a is ioclinesl slightly fOrWd~ uld dt~wnwards. The terminating layer (top layer) of the ~ln~ul~d sul-f~ t~ ~n cc~l~)rises, accorA:in9 to fig. llb, an approximately 3 to 5 ~n tI~iok lcly~r oF ~il3nd, chippings, etc.During the reciprocdtiI)g I~vunent of ~ht~ t~x-l al Itx~:it tIIe FrolIt, ciown-wardly curved arec~ 639 of tle plate-like 1~se ~ rl 6 ~ 311~1y l~el)etrcltes the ground and the alges cl~t or ticrdpe out IIIe wet~s in Ih~: t3r~t"~i, togelI1er with the roots. The weed~: cmd roots dry witI~ .I sIIt~ aInt .Ire lheI-e-fore destroyed. After removal, the weeds C~ t~ )ally be 1)nIshect awdy~
brushed to the side, sucked off or cerrit~ W~y, e.9. by correslx~ll.iing units provided on the implement.

The movement paths and the arrangement of two c3djdcent too1s are chosen in such a way that the m7ve;nent paths overlap one ~motller. The tcx71s of the front row Al and the rear row ~2 are so arrdllg~l or (3l~icieci that edcI1 ground area is covered several times.

The levers 33, 33a sht~wn in figs. l and 2 c~ 1~ n~Illt~i ab~lt shafts 23a, 23 in much the same way as the anns lS, 16, as wil1 txe explained re1ative to lever 33a by mean~: of figs. 12 to 19.
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~'~;^ ' ' ' ' ~ , , ' 1.ike figs. l and 2, figs. 12 and 13 sl~ ~he in~l~l~nt I in elevat~ cmd plan view, the implanent being rouyhly ht~lf CoVeL~l by the c(lver 8n. In tlle lower ared of the cover ao are pL~Vid~ eV-)lViny ~ ~1` strips~ ~`i(3.
14 is an elevation of the iJ~l~nent l dkYlg s.~ti-~ XlV-XlV of ig. 13.

~`ig. 13 shows the lever 15 with the two 1~s11es 24~1, 25~1 t~nd tlle ~1rs 28d, 29a, but with~1t tl~ cL~ss-braces 31a, 30a of fi(3. 1, c~s well as the tcols 61a, 60a and 65a, 64a. The lever 33a is provid~1 with the stnlts 34a, 35a and the tools 63a, 62a and 67a, 66a. [.ike the n1-t slx~n lever 33, the lw er 33a is motmted in rotd~y or piVOtdble Intllll)el- in tlle 1)racket 9 by medns of a shdft B2 cm(l it~ height o~ 1x()1~ ~IXicllly tldjllgted~ This wil1 be explained in gredter- detdil in C(Y~jUll(`ti(~l Wi~l Fi(3. 1S, which is a sec-tion along line XV-XV in fig. 13. ~cc(~k1ni~ t1~e inte1T~sing of a ~A m bber pad 83, tl1e lever 33 is screwo~ to ~ s1~f1 82. In tllis case the screws 84a have a certdin cledrdnce in th~ 1e~ess~s 1)F tlle lever 33a and in the through bores of d plate 84b cc~ln~t~l to the shclFt 8~. The s)aft 84 is mounted by me~ls of ~1idi119 bedrings 85, whic11 ~s11re Ix)th a rotary or pivotable mLunting of the shdft 84 tmd ~1 dXitll disp1clo~n~t tllereof in tlle bracket 9. Between the bracket 9 and the lever 33d iS providad the spring 55, cf. fig. l. ~'or da~ g the axiaL vibrdti1~1s a1l-1 also the rotdry vibra-tions there is a friction damping el~nent 86 ~1(3~113in13 1lnder t~lsion on the shaft 84.
~;
In much the sane Wdy as the bars 28d, 29a dre llelll in ~lle IllSIleS 25d, 24a of figs. l and 2 by medns of a nlbber beariJn~ in F i11s. 12 13 and 1S the L-aces 34a, 35a dre fixt-xd to the lever 33d ~ t ~be l~ot slx~wn lever 33 by ns of rubber lx~drings dS will be cxpk~ill.~l r.l~lt ivc ~1~ I igs. 16 and 17.
Fbr thi~ purpose the lever 33d h~ls ~l frt~nt <unl a rc~ sh 87, 8B in whicl the cross-braces 3~d, 35d are held in l)s~ ti~ n-~l~ I)y lue~u~s t~f ~lle nlbber bearing 89 (wht~r~f in Eig. 16 th~ l~lsll 87 is Sl~ l in section) to the extent thdt this is pennitl:ed by the ll~eri~l clkll~ tel-istics t~E tlle nlbber used or tl~e openings in the disks 87d, B7l)~ t~ l of ~lle cross-braces 34a, 35a pn~jt~ts into thei lever 33~1 I)y .~ sl~ -e llc(~k 90 Shdp~i onto d disk 9I ct~nnecte~ to the cn)~:s-brdceii; 3rd 3~ c n~l; ')() dllt~ws an .

`.~ ` . : ~. ' .:

,i , ~ ' ~ ' , ' . ,~ , :

c~sci l latill9 InC~Vt3~ t: ~>t` tl~ l)r~`t'~3 ~r>~

ti(~dlly mo~llltt~3, t~.9. il~ )l~r ~c~ 3~ "~ lttX (~
1~ ~ and tllerefore ~ht~ t~ ls ~ 66d in F ig. I~ e ~ el~ ill f lexil)i 1 i ly ~-pivot:inc3 possibili~y ~II)t~lt ~he ~ f~i t3~l in ~ ) Ol- in or ct)~mler ~t~Ll~ movanent Airt~lk)n A. ~`ic3. Ii once c~ in ~h(~"i ~he l~xlles 3f~, 37~1 aralnd Wtlich IOX~ he c(ll!les ~In an(? ~7.

As a result of the pivotdble or rotdry n~llltiny of ~he It~ers 33a, 33 in ` `
tlle bracket 9 an exact, vibratioll-free llx~mtillg o~ tlle levers is ensur~?.
As a result of the axicllly displacedhle nx~ ing cmA tlle pivotdble mo~n-ting of the levers 33d, 33 with respect k) the sl~dft 8~ and Aue to the pivo-table mounting of the ~ihdfts 34a, 35a or 35, 3~ it is ?~ssible to ens~lre c~l I

optimlm adaptation of t11e corres~x~nding h~rkin~3 el{m~ts to yro~nA ~Ineven-nesses.

In the ~dne Wdy a~i the ltver~i 3~cl, 35cl ~In~ <l, ~ I, 28, 9 c~l l~
I~Lwided witll ~ ~ k '3(), d~ l(lWIl ill (`(#I jllll(`l.i(il Wi~ 1. rll~neck 90 prevents ~ tilting of the colle~lx-n(lil~ ;, s~ tl~at Ih~re is no ~'~ ne~t for cros~-brace~ , 30a, 31, 30, a~ in t i-J. 1.

As can be gathere~t ~r~n f igs. 17, 18 an~t 1'), ~ lst~ has ~"
edge ~tting device 95, which Cdll l~e fix~l to tl~e ~n~sin-~ 8n by me~ls oF d supporting ann 96. To the sllpp~rtin-l dnn 96 i~ f ix~t c~n in this cclse square guide slee~e 97, in whicll is sli(lingly g~ t~l ~ s~ldre bdr 98. By means of a setscrew 99 sdid square bar can be fixe~t ~t ~ fixed spdcing fran the supporting ann 96, so that it is possil)le to ~tjust the height of the Q~tting wheel or jointer 100 n~untest in ro~dry mdnner at tl~e lower end of the square bar. To the square bar 98 is also fix~d d stripping pldte or blade lOl, which in the case of a forwanl n~n~t in the direction of the arrow A mcves towards the centre of the il~ l~n~t Idwn l~)rtions separateA
by the cutting wheel lOO. These Idwn or e.lrllll~lls cll-e then ~lso "work~1"
by the tools, the (31'dSS ~d I~X)tS l~iny l~lr~3~ fr~n ~he soil.

.~

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Claims (24)

- 13 -

1. Implement for removing weeds from paths, squares, parks, etc., which in particulate have a covering layer of gravel, sand, chipping or the like, with an implement carrier, which has at least one movable component, on which is mounted at least one tool to be brought into contact with the ground, characterized in that the tool (60, 60a, 61, 61a, 62, 62a, 63, 63a, 64, 64a, 65, 65a, 66, 66a, 67, 67a) has a shoe-like base part (63b), which has on its leading edge pointing in the travel direction (A) and its lat-eral edges blades with which it at least partly penetrates the ground, and that the tool performs an oscillating movement directed substantially tran-sversely to the travel direction.

2. Implement according to claim 1, characterized in that the tool is inclined downwards in the travel direction.

3. Implement according to claim 1 or 2, characterized in that the base part (63b) is substantially plate-like and the blades are formed by down-wardly curved marginal areas (63d, 63g) of the base part (63b).

4. Implement according to claim 3, characterized in that below the plate-like base part (63b) is formed a cavity (63c) bounded by the downwardly curved marginal area (63d, 63g).

5. Implement according to any one of the claims 1 to 4, characterized in that the lateral edges are substantially perpendicular to the leading edge.

6. Implement according to any one of the claims 1 to 5, characterized in that several tools are juxtaposed substantially transversely to the travel direction (A) in at least one row (A1, A2).

7. Implement according to any one of the claims 1 to 6, characterized in that at least some of the tools are mounted so as to oscillate or tilt transversely to the movement direction thereof.

8. Implement according to any one of the claims 1 to 7, characterized in that at least some of the tools are displaceable in a direction perpendic-ular to the soil.

9. Implement according to any one of the claims 1 to 8, characterized in that the component mounted on the implement carrier can be reciprocated substantially transversely to the travel direction.

10. Implement according to any one of the claims 1 to 9, characterized in that the tools are height-displaceable with respect to the reciprocatable component.

11. Implement according to any one of the claims 1 to 10 characterized in that the reciprocatable component is vertically displaceably guided.

12. Implement according to any one of the claims 1 to 11 characterized in that at least one of the tools is urged in the direction of the ground by a power storage means.

13. Implement according to claim 12 characterized in that the power stor-age means is a weight or a spring.

14. Implement according to any one of the claims 1 to 13, characterized in that two tools are arranged in spaced succession in the travel direction.

15. Implement according to claim 14 characterized in that the two succes-sively arranged tools operate in opposition to one another.

16. Implement according to any one of the claims 1 to 15 characterized in that several tools are juxtaposed in a front row (A1) and a rear row (A2) and that the tools of each row are synchronously driven.

17. Implement according to any one of the claims 1 to 16 characterized in that in each case two adjacent tools are fitted pairwise to one end of a double-armed lever which is pivotable about an axis running at least approximately perpendicular to the ground being worked.

18. Implement according to claim 17, characterized in that on the double-armed lever are provided both a pair of tools to the front row (A1) and a pair of tools of the rear row (A2).

19. Implement according to claim 17 or 18, characterized in that the double-armed lever is mounted is oscillating manner.

20. Implement according to any one of the claims 1 to 19, characterized in that at least certain of the tools are so guided and/or mounted, that the in each case leading blade in the direction of the reciprocating movement penetrates the soil to a greater extent than the trailing blade.

21. Implement according to any one of the claim 1 to 20, characterized in that the implement has at least one double-armed lever between two outer double-armed levers, which in each case carry a pair of tools or the front row (A1) and a pair of tools of the rear row (A2).

22. Implement according to any one of the claims 1 to 21, characterized in that a pair of adjacent tools of the front and/or rear row is located on a common cross-brace, which is pivotable at least approximately transversely to the plane covered during the reciprocal movement.

23. Implement according to any one of the claims 1 to 22, characterized in that one of the double-armed levers is drivable by an oscillating drive of the implement.

24. Implement according to claim 23, characterized in that all the double-armed levers are drive-coupled to one another.