DE2502806A1 - DUST COLLECTING DEVICE FOR GRINDING MACHINES - Google Patents

Description

Minneapolis, Minnesota / USA Attorney File: 7494

Dedusting device for grinding machines,

The invention relates to dedusting devices for sanding machines, especially for the belt sanding machine frequently used in the woodworking industry. These belt sanding machines generally contain a vertically oriented sanding head for a wide, endless sanding belt, which at the lower end is via a motor-driven pressure roller and at the upper end via an idling belt tensioning roller runs, so that the sanding belt is divided into upward and downward running strands, the pressure roller presses the sanding belt against the work piece running through the machine Understandably, the grinding of the workpiece with the high speed sanding belt creates an enormous amount of dust _o Obviously, this must be taken care of that such grinding machines receive a dedusting device »

5098 3 3/0227

Conventional dedusting devices for grinding " Machines consist of a cylinder separator and two Suction lines »A suction line leading to the separator comes from a suction head near the working area of the hasehine and the other leading to the separator Line goes from a hood that is attached to the top of the grinding head.

Even if such previously known de-breathers were able to "carry away the largest rope of dust and the bit flooring machine abraded material, they suffer from an unbelievably low degree of efficiency, as they have to demand a very large volume of air, often more than 130 et per minute = In addition, the duck deafing devices passing by require a static differential pressure of, for example, 150 mm WS ₀ at the point where the suction lines are connected to the Maaohlne. As a result, the energy requirement of single dedusting devices is very high *

The Zyolon separators were generally brought on the Baoh de building in which the grinding machines are located or the 3 / olon separators were brought in at least so that the * theoretically dust-free - air

609035 / D22T

the separator could get into the outside air ₀ Since the Lufv; prektioon night is free of small dust pnrfcikela. lies, here's a serious source for that

I-

'Uitvörsehmutcung "Bieoer past practice was Thit legislation opposed by which ■■■ .la sue the separators coming air Eunäobat in an r ^ lteröack-BÄura must be conducted in the large vacuum-7; ^v i.ltere8clr & from the Ifloft the nooh existing fine .Article Gtttfernön _f beror di © air released to the outside v; crdoD T & mti, The Kue & tBllche energy, which one need-ty öio liul't through the walls of the vacuum cleaner bag iaibent rises in the same Measure to which dae j-sunimmi; _f bo that every serious reduction <3en Lii3? i "5 * o: airaenß can already make a considerable contribution to VAf; Rna Wlrlrnngogrados.

XoS. Unt ^^ i> uohungen aur improve Entetaubungsvorriobtungen vurde now found that the Wirkungegrad deo Syetcne considerable extent abn them and depends, like the air of one ^r is eugeführt in which the SohleIfstaub crseugt w'.i-'flc The bieher known Entetaubungevorrichtungen or / Uebi old no means for controlling the air entering the air ArbeitBsone _c Why this was βο iat _f unknown

BATH ORIGIMAL 509 833/02 27

2502906 • 4-

auseunutsen the above discovery * e g "Mäss is proposed for sin ensure that the air is no longer uncontrollably into the work there one enters the the Sohleifεtaub created · The air inlet s solely About carried an air duct that ηIchν opens only directly into the Work Zone ; but also ensures that the incoming air strikes the surface of the sole hoop immediately above its upward running irum

To use air flow to the loop Taub elimination .in an upper region of the grinding head and also in the Work zone at the lower end of the Sohleifkopfes wherein zn this purpose, an air guide uta the Wirkungegrad a Bntetaubungsvorrichtung nook further SSU improve »of the invention, according to proposed" gen "the provided ₉ is the entire drum of the sanding sand that runs upwards and a curved hood is used as the inlet, which surrounds the sanding belt tension roller provided at the top of the sanding head ₀

Sa the height of the sole grinding head of a grinding machine depends on the length of the sole _{grinding belt 9} and since this height changes from grinding belt to grinding belt

509833/0227

proposed goiaäß a further feature OCE invention, the compound _t between the gekrüm t © n air inlet cowl and the air guide ao make that one can -Move the hood to the air guide for height adjustment at the upper end of the grinding head and regardless of the length of the Sohleifbandes a predetermined positional relationship can be maintained _a

Am tearing the abrasive belts kosrnnt in grinding machines - though not often - before, leading to consequences that may be ernat βϊχώ, has always been the possible outbreak of fire is greatly feared in the industry .holzverarbeitenden "Su this Λ / £ βοΐ has All possible precautions have already been taken , but up to now there have been no feasible ways to counteract the creation of an expensive expense _P which is triggered by the fact that ϊθ ^ Ιθ of the sole strap are caved into the air ducts and then get into the dust collector system, of course such abrasive belt fragments are very hot, so that they can explosively süntlon the dust in the dust collector »

Bio knowledge of this danger led to the invention Suggestion of a toric'JUnS - on the suction head of the suction line Gate direction to be provided «.

509833/0227

Further details of the invention result from atm des? following detailed description and advised * 'ooi added drawings in which a preferred form of a Schlaifmasohiae designed according to the invention is illustrated, for example.

In the drawings you can see:

1 is a perspective view of a Beati grinding machine with invention-related dedusting device,

Fig. 2 is a partially broken away au Fig. "I ₉

3? Ig · 3 a cross-section through the outer »end part of the air supply and the Sanglei.tungen ia connection with the von der Auärttckwalse & stütEtan grinding belt,

Figo 4 is a perspective production of Iitaft-

supply and suction lines from the side UETC the uaoh above current Srum üea Kehleifbandee ssuge ^ andt is "

509833/0227

5 shows a perspective representation ο, θτ

according to Pig β ^ "seen ^from ^ ^he opposite and

Pig 6 a view similar to Jig 2 sur another feature of the discovery

The wide banä shown in the drawings "consists of a machine frame 10 * which ohen.eine conventional grinding head 11 carries and below one Contains workpiece feeder 12.

Bgπ distortion cw ice "formed as a weld construction Maschinengontell oesteht from a Baoia 14" ^ n the calibration Ewei according otoen projecting side parts 15 and 16 ansehüeßenc hit the side portion 16 rigidly iet log ZWL other side part extending horiacataler arm 17 hefestigt _£ which one also as a means carrier o can mark _o X) Ia be * medium »carrier carries the grinding head <,

The conventionally designed grinding head stands from an endless sole hoop 18, which below over a Andrttckwalsse 19 and above a 20 is running. As in the applicant's ÜS-PS 3 777 442

509 833/0227

described, the Andrückwalse 19 rests in camps * ijo on the middle carrier 17 "attached sinö and down to sre-gor. * The idle catfish 20 rubt in camps 21 on ü®a äxmfm a Joehee 22, which above the Büttel wearer: ο with a A locally attached pneumatic cylinder 25 is supported so that the idle shaft 20 can be moved upwards to the 4th of the sole if the belt is to be tensioned »

The pressure rollers 19 at the lower end of the with a drive motor (not shown) which circulates the sanding belt with respect to the Piguren 2 waä 3 in the opposite direction Btit high eschwiafligkeü sjpi. Thus the sole if band consists of one-n upward running Irum U and one downward running D · (Pig · 2).

Kit using the AndrtiekwalBe the Schleifbane is gegv, n welche3 a surface of the workpiece pressed he ^ _e lc motor-driven conveyor belt 24 of the Werftetüofc "·· zufUhrung moves through the grinding machine 12th Ώ & «? I ^ the pressure roller revolves in the reverse direction _{f /} we ü öet> by the attack of the sanding belt on the sanding dust produced in the same direction as the

509833/0227 bathroom original

25028QS

of the workpieces to the front and with the one running upwards Trum des Sole if it was promoted to Olsen »

The height of the workpiece feeder 12 can be adjusted in the usual manner in order to enable adaptation to workpieces of different thicknesses. Screw spindles on which the workpiece feed is ocgestÜbst are used for this adjustment ο These screw spindles are moved together with a handwheel 25 " _o If the workpiece feed is set at the correct height, the workpieces, one of which is shown in Fig. 2, will roll between KLeinm 26 and 27 The clamping rollers η 26 are in the machine frame at the infeed and outfeed:.? 3-3: i'k © of the grinding head, while the Klemmwalsaa 27 rope of the workpiece feed RolXuii pairs preloaded »so that they press the workpiece onto the workpiece conveyor belt»

Further, inlet and outlet provided on the side 26 and 29 mil align the workpiece as closely as lent on the contact line between the grinding band workpiece when the workpiece comes to only ο -α 3 emotion with the abrasive band and even if dae

BATH 509833/0227

25Q28Q6

- ίο -

piece of the sanding belt is relocated. These ands; - ^ sohuhe 28 and 29 are sswischen side plate » gf £ u- & w.V- _s the rope of the hanger frame are and extend over us-; - including the width of the sole ifband extend » ßenais. vrlo 2 .r> Andrüokwalzen 26 the Pußspitaes «er inuÄlic r- shoes 28, 29 pressed down in the direction of the Weska-älofe gr .

In connection with the invention, it is important to point out ο. &: * && that the inlet side of the pressure relief. S6 aiaii concave curved surface ₉ has the baru the Sühlsif is "narrow-adjacent" This relation of the mentioned ^(üeil & isyb not new "but exploiting this relationship for the vmüJ ^^ nüo invention as the subsequent still seigen is ·

Just like in older dust extraction systems from 3roi-ä ^ snci-sole machines, the sole if staub at Betelol:> äsa: HaBobine from the work area is passed over a Saugloitwig rO nl> - whose mouth 51 is close to the lower läaä © ice grinding head . Connect to the suction line; ai-century ?:. :: Pipeline 32, which is not shown on a · -; η Oyllov Separator leads »The separator is suction air.";;: «. le _s through which the grinding dust enters the! Binding 31 dsr? a7 irl: i ^

SAD

5 0 9833/0227 ^Bf

30 is used _r as ea was also with all older dedusting precautions of the Pail. According to the present invention, not only is the supply of the air but also the working zone controlled, but it is also regulated nooh use the air supply to remove the sole dust from the sanding belt.

At this stage, the fresh air is supplied to the working zone via a vertical air duct 33, which covers the upward running strand of the sole and is adapted with regard to the dimensions and the shape ^r formed _f velohe surrounds the sole belt tensioning roller 20 at the upper end of the grinding head

The Xnfts & ufiihrung 33 iat with a flat fore-hand 34 and a flat wall wall, which over sometimes parallel cross winds 36 atit each other are (see Fig. 4 and 5) «Infeed feeder 33 and suction

50 9 8 33/0227

circuit 30 are connected together to form a unit lie bon part, the rear wall 35 of the LiiftstuCi-l the Verdertirmd the suction line never made Da RohrX 32 sun Cykloneeperator a round cross wedge Nitt hs'fc _f converge the side wall θ 37 am the Seugleitung gradually * e dirergiert the rear wall 38 compared to the viand 35 such that the cross-sectional area of the bin tiborgaögeabsehnitt 39 on the upper Siiäe is essentially the same size from top to bottom constantly changes the cross-sectional shape of recbteokig ? <v. so that you connect the pipe 32

The koabinierte line arrangement with the suction lines 1st in the frame of Maechios so assigns _p that di © VoraerwanÖ 34 of liuftBuführung verifiable m & gliehet closely and parallel ku the eretrecktf upward run eaüec ü ^ yes dee Scbleifbandes, wherein the übergangsstoßÄt 39 of Saugloltung at the upper end the lisisohine protrudes Duron this arrangement arrives because ε οΤοβττα lfode the fübrung to a level hub of the axis of the epanmralse 20 with a sanding belt of medium Hugo Since the length of the sole belts differ, the height of the soble.tfband tensioning also changes e oh on the way _β So that the shaped hood 35 ^z ,

509833/0227

ue '*. without the inlet of the air supply "forms" la eis © au-Yo: ·? defined J & age with respect to the upper side of the grinding head it coamit, this hood is 33 * "at 40 articulated to de :.' IiUcksfanä 35 connected to the Luftaufübrung * 2för * wel · »G6 :: 3i \ AbatUtaung the hood 33 'serve brackets 41, which are connected with the 3iagoa? A 21 of the orphan 20 and""on this liog ^ b the Bodemjand 4-2 der gekrüaaaten hood 33 "with gleichera distance above the upper end of the sole ti'krjpitefu independent of the level of the tension roller EO ₀ lim a.lne KOnt3.nui1; ät ^f between the hood 33 and the 53" mirwüg EU göwährlßisten.? "protrudes beyond the outlet Sendo Hanbo ßin course piece in the upper rope of the air

_"F clG0 the" front edge 43 of the 42 * ϋια ß'itoiUaniten Eeiiiba 33 'gegöaüber the leading edges dor Sa.i:.?. Sonv / iuflo and Deokfläcbe the hood 33 is ^ß .surücfe snb "The Vorrlorkante 43 is ewischen the r / f. üim Soleifkopfes unrl the beginning of the abttftg-bela Sroias tlao Hohleifbandes »In this way lcann üä ifi ■ So'h'i.eifbnnu cliarcb SentriJEügalkraft aboardiirfco v-ipmb when practicing the Spanawalse Baube 20 35 * get ₀

BAD ORiGINAL

509833/02 27

-H- 250280R

To direct the sanding dust into the hood, .LoI; &, attached to the side wall of the hood 55 ', a baffle 44 ml-fc ssiass ends, which aiob in front of the Voräertetrfea 4: 5 extends to the hood bottom wall 42 »

With older 3! Nt deadening devices, was the sanding dust in the upper area of the sanding head with a? eufgenosmen separate dust catcher hood and aur Ssugluft "source promoted" According to the present invention, the Sobleifstaub at the top of the grinding head vfirä © s of air flow * of over the curved hood in the ISAF tau "guide enters _t taken"

Since the opening of the suction line is in an area where the grinding dust is eraeugt, rope gets into the suction line, but not the dust antdil the upward running Xrum dee sole if "bandes Badurobe that the air supply is close to aas risen o ' bm \ current run dee sanding belt approach puts "Irann 31 $ Lut>: supplying cooperate with the grinding belt and AELE Nasr above funded Staubpartik (3l on a path to bring" c to an area above the St ^ lelfkopfes fühxi tm which the Prisohluft _einta? ? itt ₀ Bsi all praktiech vot coming arrows are thus all the operation ei or Ifot?:

509833/0227

BATH

generated abrasive dust particles from the same air atmosphere led into the suction line "

One of the most important aspect of the invention wired © and Checkout also ßrund öa £ ₅ ÜR that the efficiency astonished bunge device represents Ent so greatly increased _the? Are the facts, ie the zone from which the mouth of the suction line ai © removes air and the sole dust carried by the Iflift, essentially against the limit supply with the exception of the air supply? " eating tion 33 _f is atjgesperrt., 2u dieeem Slwecte has the S de wall 36 »üuftsuführuag (see Pig _o 2 and 3) © read approach 45 with a convexly curved lower eans of the concave top of the gekrünmten Andafücfeschtthes 28 eag"benach'bart"Sum Ansats 45 there is a corresponding one, but it is shown in hot 47" is articulated so that you can lift it when you step on it but have suction zone

The early Andräckechuh 28 and the down directed approaches 45 and 47 of the side wall © the supply thus work together to a user request to limit air entry into the suction zone * ITm iüioch

509833/0227 _ßAD original

veiteren Sobuts against an unwanted Iniftautritt SSWE Saugsone * u have the rare-and rear walls of the Seugleitung say very far neon below to köneen cooperate with the Aaeätsssn 45 12nd 47 and the old Jtadrttckschuh 28th

Another factor for controlling the air supply to the suction zone is the tight upper surface of the door edges 48 of the junction lines 45 and 47 opposite the running overhead of the air line * Among other things, the sparking, which is caused by the spark formation, is located on the side of the side 45 and 47 statements 49 aue a material that tends to _{develop tinting 9} beleplelBwelee aue aluminum » Jam for the same reason, the dena 54 of the ventilation 35 old an aluminum • beehirarane 54 *

The Iefteuftttcrune bet about Ibrea Auelass reduced cross-section, due to the wind speed the «uetKetenden frieoaluft is increased · This line statement is caused la vesentlloben by a 7 »£ o> aige» Waadabeohnitt 50, the one on the inside of the Yorderwend 54 of the ^ oftleitang is attached. This Y-shaped Vandsbsobnitt extends from the side wall to

509833/0227

Side wall of the air duct and is provided with a plan view 51 protruding in the direction of the wall, the? Hissusrsgt over the lower edge of the conveyor wall 34 to the upper edge of an aohmal elongated outlet · »des? Form air supply au. Exactly as with the gate edges of the lower approaches 45 and 4? 1st also provide the underside of the flange 51 with a AbsoBixaning 51 * of a non-prone to sparking metal "The ge furthest Torragende edge dieeer Abeobirnstng which stand over the full width dee Sobleifbandee extends d & a Sobleifbsnd is closely benaobbart, this distance in the The order of magnitude can be about 3 mn. Sexual sequences are removed by the shielding 5t * grinding sub-parts from the upward running trujta of the Soblelfbandes "

The lower edge of the narrow elongated outlet of the air supply is formed by a rectangular wall or plate 52 which is hingedly suspended from two brackets 53. The brackets 53 are attached to the Maeonine frame in such a way that they lie outside next to the XfoftBufttbr »and suction lines. Tuck bug ·! also serve 8 & r assembly of the Sesamtanordmmg of XuftsnfUbxung and suction lines ₀

For Sobwenklagerung the plate 52 one belongs to the one

509833/0227

Plate virand welded on «Stange 54», the band parts in Bores of the bracket 53 are mounted «You plate 52 bridges the Abetand Bwisoben the rare walls 36 of the Iraftiiufabrung, 30 that due to the Sobwenklagerung the Plate 52 as a common shock absorber for the AusüaS of the air » The opening and the termination of the suction line are used for scanning Dif.Bt D & ffpfungeinriobtung separates the swei üleitesyeteme to each other at the point of their tertiaIgation.

Since the rod 54 in front of the Eliok wall 3? the ImftsEufQbrung and the Y-fUTBigen Wandabsobnitt 50 is _t gives aioh durob their interaction with the 50 Wandabsehnitt a Quersehnitte erengung ^ ^. by increasing the speed of the air discharged via the air inlet by moving the air flow smoothly past the rod 54, the lower edge part of the rear wall 35 is closed at the front and at the top, so that a horizontal object 55 that runs in the same way is released, the upper one Flaneoh dee V-shaped Vandabeobnitt 55 in naob below converging sieving g * geniitb «r lieso On the EobrSg-extending wall section 55 a thin resiliently yielding metal strip 56 is attached, veloner naob protrudes below and ensures that over the inevitable space between the rod 54 and lower edge of the rear wall 35 no air is lost.

509833/02 2 7

In that the rod 54 is fastened to one of the legs of the EeML 57, which is connected to the piston of an aerial axis 58 via a link 59, so that an actuation for pivoting the damping plate 52 is created. The Dämpfungspiette 52 indicate normal between your, open position illustrated ie in solid lines (71g. 3) and a closed position ver "are pivots which · is shown in dashed lines in the letsstgenannten parking support Tersperrt the pfungsplatte 52 changed the mouth of the Seogleitung and know that fresdsteffe enter this line, which would cause very dangerous poles. Herein lies a particularly advantageous and valuable feature of the invention, as this considerably reduces the risk of damage which could be caused by the entry of hot ropes of a broken lead into the suction line, in which the sole deaf could be recovered explosively.

activity Even if the valve stm JjMobluß that! "Ftayliaders on a source of air can also be geeoteeben, eo it is However, to pull it out, for this purpose to provide a lutoaatic control, which with a bad busaaomenerbelt the occurrence of disturbances, for example

509833/0227

Breaks in the sebum banöas and possibly a manual shutdown of the machine are recorded. Since such controls can be designed conventionally _P they are not shown in detail.

In the normal open position, the steaming plate 52 extends parallel to the lower flange 51 of the V-shaped wall section 50, as a result of which the air flowing at high speed in the air supply is directed against the area of the upward running srums of the sole belt, which is immediately above the sangent the end point of the Sohlelfbande "of the pressure roller is located · be sure has been found that the angle at which the air impinges firmly on the abrasive belt is critical" shall · This angle, as shown in FIG 3 ₀ ssu. can be seen to lie between 38 ° and 45 °.

When the pot plate 52 is in the normal open position, its free door edge is right in front of the sanding belt, so that there is a gap in the gap through which the air flow, including the suction line, opens reach, B ·! this struc- ture due to the nozzle gap results from di · Infi; “A powerful rejection effect compared to the S # Bl« ifb «äob« rfläoh ·.

509833/0227

XTm to diminish the iSurTmlence in the air, what is the free edge of the Bäapftmgaplatte Iseruaistr8ia1? _? the edge of the damping plate is provided with a smooth A], - sehirarang 60, which is also made of aluminum as a result

gives »iet convex geiarüiaat, ws. PlStsliofe® changes in the air flow

How hot grinders usual _s tseficdet see the grinding head that allows the open Suetsrad not mtr a 0 "occurs betw & grinding head for exchanging Schleifbäsäern in a sebraniartigen Qebäu ^ e 61, with the frame of ftacnbice fixed vertical Wäcden UQd an articulated angesebloesenen xur 62 (but also the Bnbetäubungsvorrichtung to Wartongezwe ^ ken suganglich makes "She üuft! mused in dae Ctelsäa @ s 61 üoes an inlet cap 63 of the ODerwandi who enter ^1).,

According to a hevosasugten AunfÜhiuagafoxiB. The sm elnea single component is installed with the need for air and suction ducts, which makes it easier to insert and replace the sanding belt? about «riger. To the caehteil oueh © lt © & g Imm, nan

509833/0227

conduit means also store so that they aie able to pivot from a working position ia sine retracted © position in which they IAB atwa3Witer from the grinding head away 1st (See Fig. 6h Zn this purpose, the conduit means at upper and lower LsnlGBrasriaea 63 and 66 mounted their äiiBsrs siado ends hingedly connected to the machine frame in each of the machine Glide arranged pneiMatlsobe Stylinäeir _6? which with their pistons via a connecting rod 68 with üan lower control arms. 66 composite ^ m sini ₉ gecön the possibility of "the

Leitnngsanordnuog tone of one position in the other

The wixrXtinggradverlsesseruiog the inventive intatautrangvorriehtung results from the fact that;] there is only 45 cubic meters of air per screen to remove the entire sole if dust & sanding machine $ while older pigeon pigeon devices needed the three-fold for the same work.

The benefit of the present invention is also evident from the reduction in the budgetary pressure differential through which the isafe is moved. G-egenub?:, Up to »up to 150 asm WS, only 100 mm WS are now required«

509833/0227

The invention thus leads to a very essential -V; .5; -; minäQ2? Ttög ciea energy requirement ε ₀ added “. MB the

chQ Staubsamaslhaulje oi3 © 3? hali3 des zucj. l '^ rtfall lcoramt »Here, too, lies'" ..iris increase the cost of an aolchen

ilen I <'e'.t <BE ¹ ^ Ii it is oi.fensicbtlicli that the invention can be goni'bor the above toeechriefeen AxisftilnruageaDgcw · iKlolt 3ueget> iläet »

509833/0227

Claims (1)

Claims «./ Dedusting device for Schlexitiaachinen rait:> .- * ^ a vertically aligned grinding head, angularly driven endless grinding belt with upwards and downwards running ü ^ wes« which with oiuor at the bottom of the grinding head at ^^ braelitei). AB.drüc3a ^r orriclitigly pressed against the workpiece * and in the area of the work area of the Sehleifbatides vergesehaneri Seugle: "You are characterized by the fact that lifting of the upward Ißiüi ϊηιη of the grinding belt (18) eiixe vertiically aligned tone above the air supply (35) is attached wmaittelbar next represents Anea "göffuiaag (43) of a Saugrorrichtung (32) connecting them _for the sanding dust discharging suction line (30), the exiting air as articulated with sharp beam against the lower end of the upward current Schleifbandtru?, and that else RVIT the grinding belt (18 is vorgßrohen) cooperating Abschirimrag that the access of air to ^{Ansaugöffnungsbsreich::,} ta substantially the Suftsufiihritng (35) limited " ο Door direction according to claim 1, characterized in that d the outlet opening of the air supply (33) is a narrow ^ Sohllts is «its anterior and posterior Xanten (51 50983 3/0227 BATH ORIGINAL extend over the width of the abrasive bandea (18) ^ let & 1θ in Tiaufricimmg anterior I & afce (52) of the slit the aniwä \ * tii running Xruoi-des SchleifbündlQs (18) closely adjacent to the. from the grinding -JSid (-J8) raltge-guided dust in the air stream laitsnfÖhren »and daö di © Ansaiigöffmwig (45) der Sat! gl © ifeung (30) over oiwö bsacbxMaltte zona tiobeia the abrasive belt (18) rai-fe the B. \ .ftaiistribtsöffnxJ.r »g is in TerbindiiBg nii / fe &albar" niier the AtistrittsöffDisng the _v 'j ;; 5) is n' .d at the top falla sciilitsaarciig over the S "hlei £ fcaii & ess erstreolcto imch Anepsmcli 2 _Z thereby geloonxuseiohitet ₉ öiiß dar ta Ban.dlaii ± i?: Lchtiiisg hand lying in front (52) of the outlet opening of the air supply (55) eu0ammeii with the sanding belt (18) delimits the cross-section of the skin between the Biftaustrittsöffming (30) Saugleituttgοming Device according to claim 1 to 3 »characterized» dad sram sifting the emerging! Fragrance of the air supply (35) to the grinding belt (18) a rectangular plate (52) is provided, the front edge of which (60) the lower limit of the outlet opening of the Idiftaufführung (33) 50983 3/0227 bathroom original 5 'Apparatus according to claim 4 characterized in that the _P Uaterkante (60) of the plate (52) and ABG-ammdet convex gekrtUsmt iat. 6. Apparatus according to claim 4 and 5 »characterized in that the rectangular plate (52) formed as a V & r ßchlußklappe and on. A point (54) half of which is located in front in Strönrangariohtimg, the outlet is niißg the air supply (33) with a hinge, so that the rectangular © plate (52) and a position in which its lower edge (60) is right next to it the sanding belt (18) and the suction hole opening is maximally large Iafc, ηηά a position in which its lower edge (60) is removed from the sanding belt (18) and the mouth of the suction line (30) to prevent the entry τοη Premdstoffe. is closed at the moment, can be swung., ο Device according to Claim 6, characterized in that the Yemchlii flap (52) can be operated manually ο Device according to claim 6 _9, characterized in that the Yersohlußklappa (52) can be automatically retrieved from one which is due to the interruption of operation 509833/0227 For example, breakage cec abrasive belts, disorders of the Grinding head and manual shutdown of the grinding machine * responds 9. The device according to claims 1 to 8, characterized in that in addition to the upper sole base tensioning roller (20) an additional mouth of the suction line is arranged. 10. The device according to claim 1 to 9 * thereby geleenmseichnet _f üi \ Q dio ütiftsiifQhrung (35) »I extends along the upward laniendevi Txrama dee sole line (18), at the lower end next to the Smigleitiing (30) emdet and at the top 'Anüe is connected to a suction opening which is located next to the Schloifbtiudepenmielee (20). ο Gate direction according to claims 9 and 10, characterized in that the wide area to a building which gives the sole belts (20) is formed, which is connected to the upper brew of the overflow (35) . 12. The device according to claim 9 to 11, characterized thereby xeiefcnet that the rertical rope of the InftBUfUhrang (33) 5 0 9 8 3 3/0227 bathroom original opposing walls (34 _f 35) _anfielst? Ten to which one (34) extends close to the constant distance next to the upward running true of the sanding belt «* (18) and. It forms a channel with the last one, via which the το «sanding belt (18) is still conveyed to the sanding device but the upper dust removal area. 13 · Device according to claims 9 to 12 * characterized in that the upper end of the vertical rope the air supply (33) at a fixed level in the Keep the tangent line «wipe the upwards running True de «Schleifbandee (18) and the grinding belt tensioningMalse (20) as a narrow elongated gap ends and there as an extension “it is a crucified kftnalartlgen, na free sin diverging building (33 ') is connected » 14 · The device according to claim 13 »characterized in that the inner wall (42) of the creased hood (33 ¹ ) of the cylindrical surface of the sole band cover (20) is closely adjacent. 15 * Device according to claims 9 to 14, characterized in that the stub (33 *) is one hoxisontal 509833/0227 Aeiu3o (40) verachwenkbar on the upper aid © dee vertical m Ksilee of the air duct (33) angeeohloaeen let, lit. on the axle bearing (21) of the 3ohlel £ band8pan & ~ valzo (20) ", 16., Device according to claim 9 to 15, characterized * that at the inlet of the hood (33 *) tinaittelbar in front of and near the adjacent surface of the solesiX-bßiid © 3 an Ablenlcbleoh (4-0) Torgeeehen iat, welcbee from the sanding belt (18) and into the hood (33 ') catches gas-flung dust. 17ο Device according to claim 9 to 16 "daduroh characterized that the lock flap (52)" with the winds of the air duct (33) a throttle part for the infeed blldot, 18 "Device in accordance with claims 1 to 17" characterized in that the outlet opening of the runner guide (33) is directed in such a way that the air flow is below a Mix angles 38 ° and 45 ° on dae aufiräjrtß. run end Stub of the sole bandee (18) hits. 19, device according to Anapruoh 1 to 18, daduroh marked 5 0 9 8 3 3/0227 -so- 250280S Seielinet that the outlet opening of the air call guide is aligned * that the exiting air the sanding belt (13) directly above the ab- * lavfpimktee of the sanding belt trtnac τοη of the Anfottokwalae (19) applied 20 · Device according to spoke 1 to 13, characterized in that the Xuftzu ^ ühruog (33,33 *) and the Suction lines. (30) including the 7 key (52) such a «combined structural element are united · * VerriohtTHig according to claim 2O ₉ is valid in that the combined structural element is mounted in the mechanical frame so that it can be pivoted relative to the grinding head (Pig · 6). 509833/0227 , 14 . Blank page