SE183927C1

SE183927C1 -

Info

Publication number: SE183927C1
Authority: SE
Publication date: 1963-01-01

Description

Uppfinnare: G R Brodie och W B Raybuck Prioritet begird frcin den 24 november 1954 (USA) Foreliggand.e uppfinning hfinfor sig till en maskin for stapling av vikta ark allteftersom de avgivas fran en vikningsanordning i en roterande tryckpress, soni är anordnad att arbeta med pappersbanor och avlamna de vikta arken langs ett eller flera i huvu.dsak vertikala plan, vilken maskin fir forsedd med .ett horisontalt staplingsbord och en eller Hera skruvlinjeformade delar, som aro anordnade att fora arken langs bordet, och som var for sig utgoras av en oppen skruvslinga, som dels dr beldgen med sin axel vinkelratt mot namnda vertikala plan, dells är roterhart lagrad endast vid sin ena arida, dels ock stracker sig pa hada sidor ou det namnda vertikalplanet. Inventors: GR Brodie and WB Raybuck Priority claimed on November 24, 1954 (USA). The present invention relates to a machine for stacking folded sheets as they are discharged from a folding device in a rotary printing press, soni are arranged to work with paper webs and deposit the folded sheets along one or more substantially vertical planes, which machine is provided with a horizontal stacking table and one or more helical parts, which are arranged to guide the sheets along the table, and which are each formed by an open screw loop. , which partly draws the beldgen with its axis perpendicular to the said vertical plane, dells is rotatably mounted only at its one arida, partly also extends on both sides or the said vertical plane.

Mom tryckeritekniken och sarskilt vid tidskrifts- och boktryckning, dr det vanligt att forse sadana pressar med mekanismer, anordnade att mottaga den tryckta banan samt att skara °eh vika banan, vanligen till ett eller fiera tryckta ark av samma storlek och likformigt sammanvikta. Langden och bred-den hos arken kan variera Over ett vasentligt omrade I beroende av den sarskilda pressuppsattningen. With printing technology, and especially with magazine and book printing, it is common to provide such presses with mechanisms arranged to receive the printed web and to cut and fold the web, usually into one or more printed sheets of the same size and uniformly folded. The length and width of the sheets may vary over a substantial area depending on the particular press set.

Arken avgivas med hog hastighet av vikningsanordningen och maste uppsamlas och staplas i och for efterfoljande hopsattning mad andra ark till ett fullstandigt tryckalster. Inriktningen och staplingen ay arken allteftersom de lamna yikningsanordningen utfores vanligen for hand och noggrannhet maste iakttagas sd att arkens kanter icke forstoras. Inriktningen astadkommes vanligen ph ett mer eller mindre ofullstandigt satt, genom att en stapel av ark tages och med kanterna slas mot en plan yta. Sedan arken emellertid sammanforts eller staplats, foreligger ett vasentligt friktionsmotstand mellan de plana ytorna pa narbelfigna ark, vilket inverkar ph omflyttningen av ett ark i forhallande till det andra. Foljaktligen kommer varje utskjutande kant pa arken ofta att skadas -vid den manuella inriktningen. Den manuella proceduren ar a.ven vanligen omstandlig, tidsodande och relativt dyrbar. The sheets are dispensed at high speed by the folding device and must be collected and stacked in and for subsequent assembly with other sheets into a complete printing article. The alignment and stacking of the sheets as the laminating device is usually performed by hand and accuracy must be observed so that the edges of the sheets are not enlarged. The alignment is usually achieved by a more or less incomplete set, by taking a stack of sheets and hitting the edges against a flat surface. However, after the sheets have been joined or stacked, there is a substantial frictional resistance between the flat surfaces of scarlet sheets, which affects the displacement of one sheet in relation to the other. Consequently, each protruding edge of the sheet will often be damaged by the manual alignment. The manual procedure is also usually cumbersome, time consuming and relatively expensive.

Foreliggande .uppfinning erbjuder nu en maskin f5r att automatiskt inrikta arken allteftersom desamma lamnar vikningsanordningen medan de hallas i vasentligen vertikalt lage utan friktionskontakt med narbelfigna ark. The present invention now offers a machine for automatically aligning the sheets as they leave the folding device while being held in a substantially vertical position without frictional contact with scarlet sheets.

I enli Jiet harmed kannetecknas maskinen enligt foreliggande uppfinning ay att horisontellt belagna staplingsbordet stracker sig in i den skruvformade delen farbi det vertikala planet avensom ut Iran den fria anden av den skruvformade delen, samt att avstandet mellan varje skruvlinjeformade dels vary fir st5rre an tjockleken hos de ark, som skola staplas, sá att mellam-um bildas mellan de vary, som aro anordnade att mottaga de nedmatade arken, och sa, att dessa ark komma till vila pa staplingsbordets yta och separat forflyttas fangs ytan, medan de hallas i ett i huvudsak vertikalt lage av den skruvlinjeformade delen, avensom att styrningar :aro sá anordnade fangs vardera sidan av staplingsbordet f Or de ark, som forflyttas Wigs detta, att styrningarna aro skilda at vid sina I matningsriktningen raknat inre andar med ett avstand, som am stiirre an bredden ph de vikta arken samt yid sina ytterandar med ett avstand vasentligen lika med de vikta arkens bredd, varigenom kanterna ph de vikta arken kunna samtidigt med forflyttningen noggrant inriktas. According to this, the machine according to the present invention can be characterized in that horizontally coated stacking table extends into the helical part beyond the vertical plane except in Iran the free spirit of the helical part, and that the distance between each helical part varies for greater than the thickness of the sheets to be stacked so as to form gaps between the variables which are arranged to receive the fed sheets, and so that these sheets come to rest on the surface of the stacking table and are moved separately from the catch surface, while being held in a substantially vertically make of the helical part, except that guides: aro so arranged fangs each side of the stacking table f Or the sheets which are moved Wigs this, that the guides aro different that at their In the feeding direction raked inner spirits with a distance, which am stiirre an width. ph the folded sheets and yid their outer ends at a distance substantially equal to the width of the folded sheets, whereby the edges ph the folded the sheets can be carefully aligned at the same time as the movement.

Uppfinningen kommer n.edan narmare att forklaras och askadliggoras med hanvisning 2— — till bifogade ritning, vilken askadliggor ett antal foredragna utforingsformer av uppfinningen. The invention will be explained in more detail below and ash-damaged with reference to the accompanying drawing, which ashes a number of preferred embodiments of the invention.

Fig. 1 a" en sidovy av en utforingsform av staplingsmaskinen enligt uppfinningen askadliggorande sambandet med vikningsanordningen samt visande en stapel av ark i laze. Fig. 1 a "is a side view of an embodiment of the stacking machine according to the invention, showing the connection with the folding device and showing a stack of sheets in laze.

Fig. 2 dr en frontprojektion av apparaten langs linjen. 2-2 i fig. 1, varvid de staplade arken uteldmnats f8r tydlighets skull. Fig. 2 shows a front projection of the apparatus along the line. 2-2 in Fig. 1, the stacked sheets being fired for clarity.

Fig. 3 är en sidoprojektion av en liknande apparat av nagot forenklad form. Fig. 3 is a side view of a similar apparatus of somewhat simplified shape.

Fig. 4 är en frontprojektion av apparaten langs linjen 4-4 i fig. 3. Fig. 4 is a front elevational view of the apparatus taken along line 4-4 of Fig. 3.

Fig. 5 ãr en sidovy i nagot storre skala av en transportorskruv, Askadliggorande olika modifikationer darav. Fig. 5 is a side view on a somewhat larger scale of a conveyor screw, Ash-making various modifications thereof.

Fig. 6 dr en sidoprojektion av en ytterligare modifierad utforingsform av maskinen. Fig. 6 is a side view of a further modified embodiment of the machine.

Fig. 7 är en. frontprojektion sedd framifran av maskinen enligt fig. 6 langs linjen 9-9 i fig. 6. Fig. 7 is a. front projection seen from the front of the machine according to Fig. 6 along the line 9-9 in Fig. 6.

Fig. 8 ar en sidovy i storre skala av en modifierad utforingsform av transportorskruven. Fig. 8 is a side view on a larger scale of a modified embodiment of the conveyor screw.

Fig. 9 ar en andvy av skruven enligt fig. 8. Fig. 9 is a view of the screw according to Fig. 8.

I fig. 1 och 2 antydes en skarnings- och vikningsmaskin av konventionell konstruktion uppburen av sidogaveln 1. In Figs. 1 and 2, a cutting and folding machine of conventional construction supported by the side end 1 is indicated.

Under maskinens arbete avstrykas skurna och vikta ark frail trumman 2 medelst avstrykartungor, beteeknade med 3, och passera nedat langs ett i huvudsak vertikalt plan samt ill mellan de samverkande dampningsbanden 4 och 5, vilka passera Over remskivor 6 med narbelagna sidor lopande nedat med pa forhand bestamda hastigheter. During the operation of the machine, cut and folded sheets frail the drum 2 by means of wiper tongues, designated 3, and pass downwards along a substantially vertical plane and ill between the cooperating steaming belts 4 and 5, which pass Over pulleys 6 with adjacent sides running downwards in advance. certain speeds.

Vid vanlig drift med hoga hastigheter kastas arken ofta ncdat fran vikningstrumman 2 med avsevard kraft. I sadana fall Or det ibland onskvart, att reglera desammas hastighet, innan de passera in i skruvtransportoren 7. Ovannaninda dampningsband kunna vara anordriade for detta andamal, nar sa Or nodvandigt eller iinskvart, men kunna alternativt vara utelanmade. During normal operation at high speeds, the sheets are often thrown away from the folding drum 2 with considerable force. In such cases, it is sometimes unreasonable to regulate their speed before they pass into the screw conveyor 7. The above-mentioned steaming belts may be provided for this purpose, when said necessary or inwardly, but may alternatively be omitted.

Skruytransportorerna 7, av vilka tva forekomma i denna speciella modifikation av uppfinningen, Oro roterbart lagrade ph axlar 8, vilka i sin tur uppbaras av lager 9, varvid axlarna 8 Oro anordnade att fOrsattas i rotation av flagon lamplig anordning, exempelvis genom koniska kugghjul 10 och en axel 11, som är forbunden med nagon ldmplig kraftkalla, genom vilken varvtalet hos skruven kan samordnas med motsvarande hos vikningstrumman 2, sa. att mellanrummet mellan skruvvarven befinner sig i utmatningsplanet f8r arken i det ogonblick varje ark avgives fran banden 4 och 5. The screw conveyors 7, two of which occur in this particular modification of the invention, are rotatably mounted ph shafts 8, which in turn are supported by bearings 9, the shafts 8 being arranged to be actuated in rotation by flake lamping device, for example by bevel gears 10 and a shaft 11, which is connected to some damping force source, by means of which the speed of the screw can be coordinated with that of the folding drum 2, sa. that the space between the screw turns is in the discharge plane of the sheets at the moment each sheet is discharged from the belts 4 and 5.

Sasom tydligast framgar av fig. 2 är ett i huvudsak horisontellt staplingsbord 12 anordnat ph en nivh. beldgen nagot under rotationsaxeln for skruvarna 7 och. stracker sig in i och mellan skruvarna till en punkt nagot Over det vertikala arkutnatningsplanet Iran vikningsanordningen. As most clearly shown in Fig. 2, a substantially horizontal stacking table 12 is arranged ph one level. beldgen slightly below the axis of rotation of the screws 7 and. extends into and between the screws to a point slightly Over the vertical sheet night plane Iran folding device.

Vdsentligen i plan med den Owe ytan pO staplingsbordet 12 och i riktning utat darifran Or anordnad en bandtransportor 13 med drivande remskivor eller kedjehjul 14 vid inneranden av transportOrbandet och lophjul eller kedjehjul 15 vid den andra anden. Remskivorna 14 drivas via en reduktionsvaxel med varierbar hastighet, betecknat med 16, genom remskivan 17 och bandet 18. Bandtransportoren uppbares av mottagarbordet 19, vilket i sin tur uppbares av 'Agra lampliga organ, exempelvis stolpar 20. Substantially flush with the Owe surface of the stacking table 12 and in the direction out thereof there is arranged a belt conveyor 13 with driving pulleys or sprockets 14 at the inside of the conveyor belt and impellers or sprockets 15 at the other end. The pulleys 14 are driven via a variable speed reduction shaft, denoted by 16, through the pulley 17 and the belt 18. The belt conveyor is supported by the receiving table 19, which in turn is supported by agra suitable means, for example posts 20.

Under drift avgivas arken frantrumman 2 i vikningsanordningen och passera nedat langs ett i huvudsak vertikalt plan mellan de samverkande dampningsbanden 4 och 5. Dessa band drivas med fordel med en ph forhand bestamd retardation frau pressens hastighet och arken f8ras neat av banden ()eh fa separat falla in i mellanrummen mellan varven pa skruvarna 7 och komma till vila med sina nedre kanter mot ovansidan ph staplingsbordet 12, sasom angives vid 21. Nar skruvarna rotera hallas arken darigenom i ett i huvudsak vertikalt plan, vilande p0 staplingsbordet 12 och forflyttas utat frau matningsplanet. During operation, the sheets are discharged from the drum 2 in the folding device and pass downwards along a substantially vertical plane between the cooperating steaming belts 4 and 5. These belts are advantageously driven by a ph predetermined deceleration from the speed of the press and the sheets are not separated by the belts (). fall into the gaps between the turns of the screws 7 and come to rest with their lower edges towards the top of the stacking table 12, as indicated at 21. When the screws rotate, the sheets are thereby inclined in a substantially vertical plane, resting on the stacking table 12 and moved out from the feed plane. .

Skruvarnas varvtal Or sa koordinerad med arkens utmatningshastighet, att varje ark forflyttas utat frail utmatningsplanet, innan foljande ark avgives till skruvtransportoren och sh att ett mellanrum emellan varven hos skruvar, vilken Or oppen vid ovre sidan, Or henget I utmatningsplanet i det moment, da. ett ark skall tillforas. The speed of the screws Or is coordinated with the discharge speed of the sheets, that each sheet is moved out of the discharge plane, before the following sheets are delivered to the screw conveyor and that a gap between the turns of the screws, which is open at the top, is hung in the discharge plane at that moment. a sheet should be fed.

Arken foras salunda atskilda framat av skruvarna till dess att de lamna skruvarnas yttre ande och ddr uppsamlas till en stapel 22, varvid arken i stapeln hallas i ett i huvudsak vertikalt lage medelst ett vinkeljarn 23. The sheets are thus slid apart at the front of the screws until the outer spirit and ddr of the laminated screws are collected into a stack 22, the sheets in the stack being held in a substantially vertical layer by means of an angle iron 23.

Allteftersom arken forflyttas atskilda langs staplingsbordet 12 av skruvarna, inriktas desammas nedre kanter noggrant av bordets horisontella yta. Sidostyrningar 24 Oro anordnade, som stracka sig utat langs varje sida av arkens rorelseban.a. Vid sin bakre ande Oro dessa sidostyrningar skilda At med ett avstand, som Or nagot storre On arkens bredd fOr att mojliggora bekvam atkomst av arken daremellan. Allteftersom dessa sidostyrningar stra.cka sig utat langs arkens rorelsebana, minskas mellanrummet dem emellan gradvis till en bredd vasentligen lika med arkens bredd och tjana sdlunda till att forflytta arken i sidled for att bringa sidokanterna i noggrann inriktning. As the sheets are moved apart along the stacking table 12 by the screws, their lower edges are carefully aligned by the horizontal surface of the table. Side guides 24 Concerns are provided, which extend outwardly along each side of the rorelseban.a of the sheets. At its rear end, these side guides separate At by a distance which is somewhat larger than the width of the sheet to allow convenient access of the sheets therebetween. As these side guides extend outwardly along the trajectory of the sheets, the gap between them is gradually reduced to a width substantially equal to the width of the sheets and thus serves to move the sheets laterally to bring the side edges in a precise direction.

Bandtransportorens 13 hastighet Or sO samordnad med arkens matningshastighet genom skruvarna, aft stapeln forflyttas langs bordet 19 rued en hastighet lika med den hastighet, med vilken stapeln hopsamlas. Operatoren kan periodiskt for hand skjuta den yttre de- — —3 len av den hopsamlade stapeln langs bordet 19 och Ater placera vinkeljarnet 23 mot den yttre sidan av den kvarvarande stapeln och salunda forflytta en del av stapeln av inriktade ark upp pa vaggan 25, som är belagen vid den yttre anden av bordet 19. Denna vagga är ledbart lagrad vid bordet 25 och 26 och bestar av vinkelarmar 27 och 28, varvid den senare armen i det 'age som visas med heldragna linjer pa ritningen, befinner sig i plan Tried bordytan. Arken hopsamlas sAlunda i vaggan shsom visas vid 29 och hallas i ett vertikalt lage me-deist vinkeljarnet 30 tills en stapel av vasentlig storlek uppsamlats. Vaggan vrides sedan 90° kring lagringspunkten 26 och fOrflyttar salunda stapeln till ett vertikalt lage for att underlatta ytterligare hantering och transport. The speed of the belt conveyor 13 is coordinated with the feed speed of the sheets through the screws, since the stack is moved along the table 19 at a speed equal to the speed at which the stack is collected. The operator can periodically manually slide the outer part of the assembled stack along the table 19 and again place the angle iron 23 against the outer side of the remaining stack and thus move a part of the stack of aligned sheets up on the cradle 25, which is coated with the outer spirit of the table 19. This cradle is articulated at the table 25 and 26 and consists of angular arms 27 and 28, the latter arm in the age shown in solid lines in the drawing, being in the plane Tried table surface . The sheets are thus collected in the cradle shown at 29 and held in a vertically low median angle iron 30 until a stack of substantial size is collected. The cradle is then rotated 90 ° about the storage point 26 and thus moves the stack to a vertical position to facilitate further handling and transport.

Nar banden 5 och 6 anvandas kunna remskivorna uppbaras av flagon lamplig anordning, exempelvis axlar 31 uppburna av sidogavlarna 1 i vikningsanordningen sasom visas i fig. 2. For dessa band och aven for transportorbanden 13 anvandas med fordel band av tidsreglerat slag ftir att forhindra glidning och sakerstalla likformig rOrelse darigenom f5r arken. When the belts 5 and 6 are used, the pulleys can be supported by a flap lamp device, for example shafts 31 supported by the side ends 1 of the folding device as shown in Fig. 2. For these belts and also for the conveyor belts 13, timed belts are advantageously used to prevent slipping and sakerstalla uniform motion thereby through the ark.

Sasom tidigare anmarkts arc banden 4 och 5 med tillhorande delar joke vasentliga for foreliggande uppfinning. En maskin, som ãr avsedd att arbeta tillfredsstallande under de fiesta forhallanden utan dampningsbanden, är schematiskt askadliggjord i fig. 3 och. 4, varvid samma hanvisningsbeteckningar angiva samma delar som i fig. 1 och 2. denna maskin befranijas likformig utmatrting av arken frail vikningsanordningen me-deist drivna valsar 32, ffista vid axlar 33, vilka valsar uppbaras av gaviarna 1 och arbeta I kontakt med de ark, som avgivas av trumman 2. Arken avstrykas fran trumman genom tungor 3 i enlighet med vanlig praxis. Arken foras darefter nedat genom tyngdkraften och sin levande kraft genom det bakre mellanrummet Indian skruvarnas 7 vary och komma till vila pa staplingsbordet 12, shsom antydas vid 1, samt framdrivas atskilda langs bordet och inriktas medan de hallas i ett i huvudsak vertikalt lage sasom tidigare beskrivits. As previously stated, arc bands 4 and 5 with associated parts are essential to the present invention. A machine which is intended to operate satisfactorily under most conditions without the steam belts is schematically damaged in Figs. 4, the same reference numerals denoting the same parts as in Figs. 1 and 2. This machine is free of uniform disassembly of the sheets from the folding device by means of driven rollers 32, attached to shafts 33, which rollers are supported by the guides 1 and operate in contact with the sheets. , delivered by the drum 2. The sheets are wiped from the drum by tongues 3 in accordance with standard practice. The sheets are then lowered by gravity and their living force through the rear space of the Indian screws 7 vary and come to rest on the stacking table 12, as indicated at 1, and are propelled separately along the table and aligned while being held in a substantially vertical position as previously described. .

Vid drift med extremt hOga hastigheter, nfir dampningsbanden joke anvandas, kan en benagenhet foreligga hos arken att aterstudsa nagot vid ansMendet mot staplingsbordet 12. Detta motverkas genom att pressa de inkommande arken i friktionskontakt med en narbelagen sida pa skruvvarvet. Anordningar for att Astadkomma detta askadliggoras i fig. 5. When operating at extremely high speeds, before the steam tapes are used, there may be a tendency for the sheets to bounce slightly when leaning against the stacking table 12. This is counteracted by pressing the incoming sheets into frictional contact with a proximal side of the screw turn. Devices for accomplishing this are shown in Fig. 5.

Sasom dar visas fastes ett avrundat utsprang 34, exempelvis genom svetsning, vid den bakre sidan 35 av skruven, sh att de inkommande arken darigenom tvingas framat mot den bakre sidan av skruvvarvet 36 och aterstudsning av arket fOrhindras salunda. SO.som ett alternativ dartill kunna anordningar forefinnas for att infOra en strale av luft eller annan limplig gas mot den bakre sidan av det inkommande arket, exempelvis genom en kanal 37, som stracker sig axiellt genom .drivaxeln 8. Luttstralen tvingas pa liknande satt det inkommande arket mot ytan av det narbelagna skruvvarvet och forhindrar salunda overdriven aterstudsning av arket. As shown, a rounded projection 34 is fastened, for example by welding, to the rear side 35 of the screw, so that the incoming sheets are thereby forced forward towards the rear side of the screw turn 36 and re-bouncing of the sheet is thus prevented. As an alternative to this, means may be provided for introducing a jet of air or other limp gas towards the rear side of the incoming sheet, for example through a channel 37 which extends axially through the drive shaft 8. The tilt jet is similarly forced incoming sheet against the surface of the adjacent screw turn and thus prevents excessive re-bouncing of the sheet.

Vikningsapparater, som anvandas I forening med rotationssnallpressar av bantyp, är ofta sa konstruerad, att den avgiver vikta ark vid olika punkter fran separata trummor i vikningsanordningen. En modifikation am uppfinningen anordnad for inriktning och stapling ay ark, som avgives fran sadana vikningsanordningar askadliggores i fig. 6 och 7, marl samma hanvisningsbeteckningar angiva samma delar som i fig. 1 och 2, och van matartrummorna i vikningsanordningen av den nu angivna typen aro schematiskt representerade vid 2. Folding apparatuses used in conjunction with web-type rotary coil presses are often designed to dispense folded sheets at different points from separate drums in the folding device. A modification of the invention provided for alignment and stacking of sheets dispensed from such folding devices is shown in Figs. 6 and 7, but the same reference numerals denote the same parts as in Figs. 1 and 2, and the feed drums in the folding device of the type now indicated are schematically represented at 2.

Arken avgivas nedat langs ett vasentligen vertikalt plan frail varje trumma 2. En skruv 7 an anordnad i varje matningsplan lagrad pa en gemensam ax.el 8, corn ãr roterbart lagrad lagerkonsolen 41 och driven av remskivan 42. Skruvarna ha i motsatta skruvriktningar sa, att varje skruv driver arken utat fran matningsplanen. Med denna anordning kan ett storre antal ark inriktas och staplas utan att staplingsmaskinen behover drivas med Overdriven hastighet. The sheets are dispensed downwardly along a substantially vertical plane from each drum 2. A screw 7 disposed in each feed plane mounted on a common shaft 8, is rotatably mounted on the bearing bracket 41 and driven by the pulley 42. The screws have in opposite screw directions so that each screw drives the sheets out of the feed plane. With this device a larger number of sheets can be aligned and stacked without the stacking machine having to be operated at excessive speed.

For att motverka benagenheten hos skruvtransportoren att forflytta arken i den riktning, van i skruven roterar, har det befunnits fordelaktigt nar tva skruvar anvandas att driva skruvarna i motsatta riktningar, varvid respektive skruvars vary aro riktade i enlighet dammed sa, att var och en leder arken i riktning -dad. In order to counteract the tendency of the screw conveyor to move the sheets in the direction in which the screw rotates, it has been found advantageous when two screws are used to drive the screws in opposite directions, the respective screws being varied accordingly so that each leads the sheets in the direction -dad.

Arken utmatas vanligen ur konventionella vikningsanordningar med den vikta kanten forst, sa att de vikta kanterna ansla mot transportbordet 12 i foreliggande staplingsmaskin. Till foljd av detta bli kanterna pa de individuella arken mindre utsatta for forsterelse genom kontakt med staplingsbordet. Vidare understodjer arkens anslag i detta lage mot bordet 12 inriktningen av de byre ytorna ph' de individuella, vikta arken. The sheets are usually discharged from conventional folding devices with the folded edge first, so that the folded edges abut against the transport table 12 in the present stacking machine. As a result, the edges of the individual sheets become less prone to enlargement by contact with the stacking table. Furthermore, the abutment of the sheets in this layer against the table 12 supports the alignment of the bearing surfaces ph 'the individual, folded sheets.

En modifierad form av skruvtransportor, som med sdrskild fordel kan anvandas i enlighet med foreliggande uppfinning, visas i fig. 8 och 9 och am sa kanstruerad, att den astadkommer en luftkudde mellan skruvens yttervarv eller -slinga och stapeln ay utmatade ark, for att forhindra overdriven friktion mellan skruvslingor och de nytryckta ytorna. A modified form of screw conveyor, which may be used to particular advantage in accordance with the present invention, is shown in Figures 8 and 9 and is so constructed as to provide an air cushion between the outer turn or loop of the screw and the stack of discharged sheets, to prevent excessive friction between screw loops and the newly printed surfaces.

Sasom visas pa ritningen stracker sig en luftkanal 43 genom stod- och drivaxeln 8 och Or genom kanalen 41, som stracker sig genom grundstativet for skruven, forbunden med kanalen 45, som stracker sig genom det rorfor- 4— — miga organ 46, varav skruvens slingor aro uppbyggda. Kanalen 45 är vid den yttre anden av skruven stuten av en plan yta 46, som Egger i ett i huvudsak vertikalt plan och är perforerad vid 47. As shown in the drawing, an air duct 43 extends through the stand and drive shaft 8 and Or through the duct 41, which extends through the base frame of the screw, connected to the duct 45, which extends through the tubular member 46, of which the screw loops are constructed. The channel 45 is at the outer spirit of the screw projected by a flat surface 46, which Egger in a substantially vertical plane and is perforated at 47.

Under drift pressas luft genom kanalerna 43, 44 och 45 med ett tryck av omkring 0,280,35 kg/cm2 och passerar ut genom halen 47 med tillräcklig kraft for att bilda en luftkudde mellan den avplanade ytan 46 och stapeln av ark 22. During operation, air is forced through the channels 43, 44 and 45 at a pressure of about 0.280.35 kg / cm 2 and passes out through the tail 47 with sufficient force to form an air cushion between the flattened surface 46 and the stack of sheets 22.

Ehuru skruvorganet 46 visats pa ritningen i form av ett rOr med cirkulara tvarsektioner underforstas, .att rektangulara ror kunna anvandas for detta andamal. Vidare är det icke vasentligt att ytterytan 46 av skruven dr heldgen i ett vertikalplan, men denna konstruktion är sarskilt fordelaktig, ,eftersom den underlattar uppratthallandet av den emskade luftkudden. Although the screw means 46 is shown in the drawing in the form of a tube with circular cross-sections, it is understood that rectangular tubes can be used for this purpose. Furthermore, it is not essential that the outer surface 46 of the screw be held in a vertical plane, but this construction is particularly advantageous because it facilitates the maintenance of the emced air cushion.

Sasom tidigare antytts, ãr skruvarnas diameter saval som stigningen och andra dimensioner hos derma foremal for avsevard variation i beroende av dimensionerna hos de ark, som skola staplas. Det ãr vanligen Onskvart, sarskilt nar arken aro utforda av mjukt, bojligt papper, att skruven har sadan diameter, att den stracker sig tillrackligt langt Over staplingsbordet for att erbjuda tillrackligt vertikalt sled for de 8vre delarna av arken. Nar arken har sadan hojd, .att detta blir opraktiskt, eller icke onskvart ur maskinkonstruktionssynpunkt, kunna enligt uppfinningen tva grupper av skruvar anvandas, vilka aro belagna Over yarandra och anordnade att bring-as i rotation, pa sadant satt, att den ovre skruyen uppbar och framdriver de Ovre andarna av arken och salunda halla arken i ett vasentligen vertikalt plan. As previously indicated, the diameter of the screws is the same as the pitch and other dimensions of these objects for considerable variation depending on the dimensions of the sheets to be stacked. It is usually inconvenient, especially when the sheets are challenged by soft, flexible paper, that the screw has such a diameter that it extends far enough over the stacking table to offer sufficient vertical sliding for the upper parts of the sheets. When the sheets are so high that this becomes impractical, or not inconvenient from a machine construction point of view, according to the invention two groups of screws can be used, which are coated above each other and arranged to be brought into rotation, in such a way that the upper screw received and propels the Upper Spirits of the Ark and salunda keep the Ark in a substantially vertical plane.

Claims

Patent claim:

A machine for stacking folded sheets alit as they are dispensed from a folding device in a rotary printing press, which Or arranged to work with. paper webs and unload the folded sheets along one or more substantially vertical planes, which machine is provided with a horizontal stacking table and one or more helical parts (7), which Oro arranged to line the sheets along the table, and which were to be formed. of an open screw loop, which is partly Or coated with its shaft perpendicular to the said vertical plane, partly Or rotatably mounted only at its. one spirit, partly also extending on both sides of the said vertical plane, can be characterized by the fact that the horizontally covered stacking table (12) extends inwards. in the helical part past the vertical plane apart from the free spirit of the helical part, so that the distance between each helical part (7) varies Or greater On the thickness of the sheets to be stacked, so that gaps are formed between them vary, which Oro arranged to receive the fed sheets, and said that these sheets come to rest on the surface of the stacking table (12) and are moved separately along the surface, while being held in a substantially vertical} Age of the helical part, Oven sorn att styrninger ( 24) Arrange sO arranged along each side of the stacking table for the sheets which are moved along it, that the guides Oro separate Ot at their in the feeding direction raked inner ends with a distance, which Or greater than the width ph the folded sheets and at their outer ends with an aystand substantially equal to the width of the folded sheets, whereby the edges ph the folded sheets can be accurately aligned at the same time as the movement.

2. A machine according to claim 1, characterized in that it Or is provided with devices (37) for guiding and discharging a gas stream in the longitudinal direction through it. or the helical portions in the direction of movement of the folded sheets along the stacking table.

3. A machine according to claim 1, characterized in that the helical parts have along their entire length. screw length one. air passage (45), which at the respective partly free On-de Or is partially closed by a perforated cradle (46) and that devices are provided for supplying air under pressure to the opposite spirit of the passage, whereby a. air flow is pressed against the surface facing the cradle on the folded sheet, as a laminar and to form an air cushion between the sheet and the said part Inn Oxide.

4. A machine according to claim 1, characterized in that a protrusion (34) is fixed inside the helical part Or at its sheet receiving, which with a rounded outer surface projects the helical part up to a point just in front of the inner surface ph of said sheet receiving part and in to hold an incoming sheet against said vary.

5. A machine according to claim 1, provided with two helical parts, which Oro rotatably mounted on parallel axes, characterized in that said parts Oro are spaced at a distance which is slightly less than the horizontal mat on the folded sheets.

6. A machine according to claim 1, having the folding device dispensing the folded sheets along two parallel vertical planes, Urine characterized in that the machine has two helical parts which Oro rotatably mounted on a common shaft (Fig. 6) and provided with adjacent receiving edges, which are straight. through the vertical folding plane of the respective folded sheets, saint that the turns ph de resp. the parts run in opposite directions, except that means are provided for rotating said parts in such a direction that each of the helical parts - - will feed the folded sheets received therefrom from the discharge plane, and that a stacking table (12) and side guides (24) are arranged for each air the helical parts. Request Publications: U.S. Patent Nos. 848,558, 1,576,243.