SE457732B

SE457732B - Scraper blade holder

Info

Publication number: SE457732B
Application number: SE8701152A
Authority: SE
Inventors: B Hedberg
Original assignee: Mekanprojekt Marknads Ab
Priority date: 1987-03-20
Filing date: 1987-03-20
Publication date: 1989-01-23
Also published as: WO1990002842A1; SE8701152D0; EP0434680A1; SE8701152L

Abstract

The holder holds the balde against the Yankee cylinder. The blade is supported laterally by the springy strip etc.

Description

457 732 2 ritningarna, pà vilka fig 1 visar ett snitt genom en hàllaranordning, som mottager ett schaberblad under anliggning mot en roterbar yankee-cylinder, fig 2 visar ett parti av hàllaranordningen sedd från sidan i riktning mot yankee-cylindern, fig 3 visar principen av ett schaberblad, och fig 4 visar scbematiskt en schaberbladshâllares applicering vid en yankee-cylinder, sett från ovan. 457 732 2 the drawings, on which Fig. 1 shows a section through a holding device, which receives a doctor blade during abutment against a rotatable yankee cylinder, Fig. 2 shows a portion of the holding device seen from the side in the direction of the yankee cylinder, Fig. 3 shows the principle of a doctor blade, and Fig. 4 schematically shows a doctor blade holder application to a Yankee cylinder, seen from above.

I en stomme 1 hos en hållare 2 är anordnat att kunna mottagas ett utmed en s k yankee-cylinders mantelyta 3A rörligt drivbart bandformigt schaberblad 4 i ett utmed ifràga- varande yankee-cylinder 3 sig sträckande spårformigt bladmot- tagningsutrymme 5.In a frame 1 of a holder 2 it is arranged that can be received along the mantle surface 3A of a so-called yankee cylinder movable drivable band-shaped doctor blade 4 in a Yankee cylinder 3 extending groove-shaped blade motor shooting space 5.

Vid sagda bladmottagningsutrymme 5 finnes band löprullar 6 eller andra lämpliga stödjande organ, som är anord- nade för att stödja ifrågavarande utmed schaberbandbladshållaren 2 rörliga schaberblad 4 under dess anliggning mot yankee-cylin- dern 3.At said blade receiving space 5 there are bands rollers 6 or other suitable supporting means, which are arranged to support the matter along the doctor blade holder 2 movable doctor blades 4 during its abutment against the Yankee cylinder dern 3.

På var sida om bladmottagningsutrymmet 5, sett i riktning mot 7 resp från 8 sagda yankee-cylinder 3, är anordnade mothàllselement 9 resp 10, som är anordnade att kunna samverka med sidoytor 4A, 4C hos ett ifrågavarande schaberblad 4 för att stödja upp detsamma i sidled. Sagda mothâllselement 9, 10 kan bildas av rullningselement och/eller av glidelement, och i det visade exemplet bildas de närmast cylindern 3 belägna mothâlls- elementen av glidelement 9 medan de mothállselement, som är belägna längst från cylindern 3, bildas av rullar 10.On each side of the blade receiving space 5, seen in direction of 7 and from 8 said Yankee cylinder 3, are arranged support elements 9 and 10, respectively, which are arranged to be able to cooperate with side surfaces 4A, 4C of a scraper blade 4 in order to support the same sideways. Said retaining element 9, 10 can formed by rolling elements and / or by sliding elements, and in it In the example shown, the abutments closest to the cylinder 3 are formed. the elements of sliding elements 9 while the abutment elements, which are located furthest from the cylinder 3, is formed by rollers 10.

Mothàllselement 10 uppbäres av en i sidled rela- tivt yankee-cylindern 3 fjädrande list 11 eller något liknande fjädrande bärelement, så att bladet 4 kan stödjas fjädrande i riktning från 8 resp mot 7 cylindern 3, när bladet 4, såsom visas i fig 1 resp 3, ligger an mot cylindermantelytan 3A vid avschabring av exempelvis en utmed cylindern 3 medlöpande pappersbana 12 från cylindern 3 under kräppning av banan 12 vid samtidig omlänkning av banan 12 från cylindern 3 i riktning av pilen 13.Resistance element 10 is supported by a laterally rela- yankee cylinder 3 resilient strip 11 or the like resilient support element, so that the blade 4 can be resiliently supported in direction from 8 and towards 7 respectively the cylinder 3, when the blade 4, such as shown in Figs. 1 and 3, respectively, abut against the cylinder shell surface 3A at scraping of, for example, a co-driver along the cylinder 3 paper web 12 from the cylinder 3 while creping the web 12 at simultaneous deflection of the web 12 from the cylinder 3 in the direction of arrow 13.

Den fjädrande listen etc 11, som företrädesvis sträcker sig utmed cylinderns hela längd kan vara inställbar i 3 457 732 sidled relativt yankee-cylindern 3, exempelvis genom att listen 11 vid dess övre ände 11A medelst exempelvis ett passande spår 14, i vilket sagda ände 11A mottages orörlig, är förbindbar med en listfästdel 15. Sagda listfästdel 15 är medelst exempelvis radformigt fördelade ställskruv 16 och mutter 17 eller andra lämpliga fästorgan lásbar i önskat inställt läge i förhållande till hàllarstommen 1.The resilient strip etc 11, which preferably extends along the entire length of the cylinder can be adjustable in 3 457 732 laterally relative to the Yankee cylinder 3, for example by the strip 11 at its upper end 11A by means of, for example, a suitable groove 14, in which said end 11A is received immobile, is connectable to a strip mounting part 15. Said strip mounting part 15 is by means of, for example row-shaped adjusting screw 16 and nut 17 or other suitable fasteners lockable in the desired set position in relation to the holder frame 1.

Listfästdelen 15 kan, såsom ovan sagts, innefatta en övre del 15A, som kan_omgripa den övre delen 11A av den fjädrande listen etc 11, exempelvis medelst spåret 14, och som vilar på en stöddel S, exempelvis två på inbördes avstånd från varandra belägna lister mellan vilka skruvarnas skallar 16A mottages. Ställskruvarna 16 är anordnade att mottagas av hål 18, som sträcker sig genom i vinkel från sagda listfästdelsöverdel 15A nedåtskjutande nedre del 158. I spärrat läge medelst ställ- skruvar 16 och muttrar 17 är linfästdelen 15 låst, så att den förhindras att röra sig i riktning 8 från yankee-cylindern 3, men företrädesvis tillåtas röra sig i riktning 7 mot densamma.The strip mounting part 15 may, as stated above, comprise an upper part 15A, which can grip the upper part 11A thereof resilient strip etc 11, for example by means of the groove 14, and which rests on a support part S, for example two at a mutual distance from each other adjacent strips between which the heads 16A of the screws received. The adjusting screws 16 are arranged to be received by holes 18, extending through at an angle from said strip attachment upper 15A projecting downwardly lower part 158. In the locked position by means of screws 16 and nuts 17, the line fastening part 15 is locked, so that it prevented from moving in direction 8 from the yankee cylinder 3, but preferably allowed to move in direction 7 towards it.

Den fjädrande listen ll är vidare anordnad att med dess nederdel 1lB mottagas i ett utmed bladmottagningsut- rymmet 5 sig sträckande spår 19, som liksom spåret 14 kan upp- visa mot spàrets botten konvergerande spárväggar.The resilient strip 11 is further arranged to with its lower part 11lB is received in a blade receiving space 5 extending track 19, which like the track 14 can be show towards the bottom of the track converging track walls.

Mothållsrullarna etc 10, som uppbäres av sagda list etc 11, så att dess lagringsaxel 10A sträcker sig väsent- ligen parallellt med bladet 4, är anordnade att under rullning anligga med dess resp rullningsytor 10B mot den sidoyta 4A av bladet 4, som är vänd i riktning 8 bort från yankee-cylindern 3.The abutment rollers, etc. 10, which are supported by said strip, etc. 11, so that its bearing shaft 10A extends substantially parallel to the blade 4, are arranged to be during rolling abut with its respective rolling surfaces 10B against the side surface 4A of the blade 4 facing direction 8 away from the yankee cylinder 3.

Nedtill är schaberbladet 4 anordnat att stödjas av en i vertikal riktning 20, 21 inställbar bottenstödlist 22, som invändigt vid botten 23A av en ränna 23 mottager de sagda roterbart lagrade bandlöprullarna 6, på vars mantelytor 6A schaberbladets nederdel 4B är anordnade att stödjas upp under bladets matning utmed yankee-cylinderns 3 mantelyta i åtminstone en av riktningarna 24 resp 25 utmed sagda cylinder 3. Sagda bottenstödlist 22 är anordnad att styras av företrädesvis parvist anordnade rullar 26 eller andra styrorgan, som löper utmed ett flertal snedställda spår 27, som sträcker sig snett relativt schaberbladet 4 och dess avsedda matningsriktning 24, 25, såsom exempelvis visas i fig 2. 457 732 4 Mellanrum 28, 29, som bildas mellan schaberbladet 4 och sagda hållare 1 vid bladmottagningsutrymmet 5 är anordnade att effektivt kunna tätas medelst ett antal utmed bladets ut- sträckning utmed hállaren 2 sig sträckande s k dammtätningsorgan 30, 31, som företrädesvis består av fjädrande material eller som på annat vis är fästade vid hàllaren 2 så att de effektivt tätar. _ Funktionen av den ovan beskrivna schaberblads- hàllaranordningen torde ha föstátts av det ovan sagda och det på ritningarna visade, men kortfattat kan nämnas att när schaber- bladet 4 drives medelst på ritningarna ej visade drivmedel i endera drivriktningen 24, 25 mottaget i utrymmet 5 i sagda hållare 2 stödjes det av de på var sida om bladet 4 belägna mothàllselementen 9, 10. Därigenom möjliggöres för elementen 10 att fjädra i riktning från 8 resp mot 7 bladet 4; så att de effektivt anligger mot bladets mot sagda element l0.vända yta 4A, oberoende av eventuella ojämnheter hos cylindern 3 eller banan 12, som bladet 4 påverkas av. Rätt läge för elementen 10 har dessförinnan inställts medelst ställskruvarna 16. Motsatta sidan 4C av bladet 4 anligger å andra sidan mot mothàllselement 9 medan bladets nederdel 4B stödjes av bandlöprullarna 6. Rätt höjdläge för bladet 4 inställes genom att påverka bottenstöd- listen 22 att röra sig utmed spåren 27 till rätt nivå för att därvid låsas i önskat inställt höjdläge medelst lämpliga làsdon.At the bottom, the doctor blade 4 is arranged to be supported of a bottom support strip 22, which can be adjusted in the vertical direction 20, 21, which inside at the bottom 23A of a chute 23 receives the said rotatably mounted the belt rollers 6, on whose mantle surfaces 6A the lower part 4B of the doctor blade is arranged to be supported under the blade feed along the mantle surface of the yankee cylinder 3 at least one of the directions 24 and 25, respectively, along said cylinder 3. Said bottom support strip 22 is arranged to be guided by preferably pairs of rollers 26 or other guide means, which run along a plurality of oblique grooves 27, which extend obliquely relative to the doctor blade 4 and its intended feeding direction 24, 25, as shown, for example, in FIG. 457 732 4 Spaces 28, 29, which are formed between the doctor blade 4 and said holder 1 at the blade receiving space 5 are arranged to be able to be effectively sealed by means of a number along the stretching along the holder 2 extending so-called dust sealing means 30, 31, which preferably consists of resilient material or which otherwise attached to the holder 2 so that they are effective seals. The function of the doctor blade described above the holding device should have been fixed by the above and that on the drawings showed, but it can be briefly mentioned that when the blade 4 is driven by means of propellants not shown in the drawings in either the driving direction 24, 25 received in the space 5 in said holder 2 is supported by those located on each side of the blade 4 the retaining elements 9, 10. This enables the elements 10 to spring in the direction from 8 and to the blade 4, respectively; so that they effectively abuts against the blade against said element l0.verted surface 4A, regardless of any irregularities of the cylinder 3 or the web 12, by which the blade 4 is affected. Correct position of the elements 10 has previously been adjusted by means of the adjusting screws 16. Opposite side 4C of the blade 4 abuts on the other hand against abutment elements 9 while the lower part 4B of the blade is supported by the belt rollers 6. Correct The height position of the blade 4 is adjusted by influencing the bottom support. the strip 22 to move along the grooves 27 to the correct level to thereby being locked in the desired set height position by means of suitable locks.

Genom att listen etc ll är fjädrande kan denna tillåtas fjädra ut i sidled och lämpligt är att låta uppbära elementen 10 nära listens mitt för att åstadkomma maximal ut- fjädring av elementen 10.Because the strip etc ll is resilient, this can allowed to spring out laterally and it is appropriate to have it supported elements 10 near the center of the strip to achieve maximum output suspension of the elements 10.

Uppfinningen är ej begränsad till ovan beskrivna och på ritningarna visade utföringsexempel, utan kan varieras inom ramen för patentkraven, utan att uppfinningstanken frángås.The invention is not limited to those described above and exemplary embodiments shown in the drawings, but can be varied within the scope of the claims, without departing from the spirit of the invention.

Claims

'r 5 457 7: 2 P a t e n t k r a v

Device for a holder (2) intended for a belt-shaped movable doctor blade (4), which comprises a groove-shaped blade receiving space (5) extending along the outer surface of a yankee cylinder (3A), at which belt conveyor rollers (6) or other supporting means-for supporting the scraper blades (4) movable along the doctor blade holder (2), and on each side of the blade receiving space (5), seen in the direction of (7) and from (8) said yankee cylinder (3) , arranged with a receptacle element (9, 10) cooperating with the blade (4) in question, characterized in that the blade (4) is arranged to be supported laterally (7, 8) relative to the Yankee cylinder (3). ) resilient, restraining element (10) for the blade (4) supporting strip (ll) or similar supporting elements.

Device according to claim 1, characterized in that rollers and / or sliding elements acting as abutment elements (10) are supported by the strip etc (11) at its side facing the blade (4).

Device according to one of the preceding claims, characterized in that the resilient strip, etc. (11) is adjustable laterally relative to said Yankee cylinder (3).

Device according to claim 3, characterized in that the resilient strip etc. (11) is connectable at its upper end (11A) to a strip fastening part (15), which can be locked by means of adjusting screw (16) or other fastening means. in the desired set .nu mode.

Device according to claim 4, characterized in that the fastening part (15) comprises a part (15A) which can be gripped by the resilient strip, etc., which rests on a support part (S) and which by means of said adjusting screw etc ( 16) is arranged to be locked to be prevented from moving in the direction of the (8) yankee cylinder but is preferably allowed to move towards it. _

Device according to one of the preceding claims, characterized in that the resilient strip etc (ll) is arranged to be received with its lower part (11b) in a groove (19) extending along the blade receiving space (5). 4s7 ~ 7s2 6

Device according to one of the preceding claims, characterized in that abutment rollers (10) are supported by the resilient strip, etc. (11) to abut with its rolling surfaces (108) against the blade of the Yankee cylinder (3). turn side surface (4A).

Device according to one of the preceding claims, characterized in that the doctor blade (4) is arranged to be supported by a bottom support strip (22) which can be adjusted in the vertical direction and is provided with belt rollers, etc. (6).

Device according to claim 8, characterized in that the bottom support strip (22) is arranged to be guided by sloping grooves (26) or other guide means running along inclined grooves (27) relative to the doctor blade (4).

Device according to one of the preceding claims, characterized in that dust sealing means (30, 31) are arranged between the doctor blades (41 and the holder (2).