SE441418B

SE441418B - Scraper in order to remove coatings or particles on the periphery of a rotating wheel or on an endless running belt

Info

Publication number: SE441418B
Application number: SE8401050A
Authority: SE
Inventors: Bror Elofson
Original assignee: Bror Elofson
Priority date: 1984-02-27
Filing date: 1984-02-27
Publication date: 1985-10-07
Also published as: SE8401050L; SE8401050D0

Abstract

The invention refers to a scraper in order to remove coatings or particles on the periphery of a rotating wheel or on an endless running belt. According to the invention the scraper (3, 4) is placed at an angle against the direction of motion at the object (2) to be scraped as well as set up to oscillate in a direction parallel with the scraper's edge line (5). The scraper can be tipped up from and down toward the object through turning around an axis of rotation (9) parallel with the direction of oscillation. Oscillation is achieved with the aid of an air cylinder (8), whose centre axel runs together with the axis of rotation (9).<IMAGE>

Description

15 20 25 30 35 s4d1aso-3 tent, varigenom man undviker att skrapan onödigtvis länge ligger an mot det objekt som skall skrapas. Lämpligen åstadkommas oscilleringen _med hjälp av en luftcylinder, vars centrumaxel samanfaller med nämnda vridningsaxel. För till- och frånslag används lämpliga pneu- matiska till- och frånslagscylindrar. Genom att variera trycket i dennas pluskammare kan skrapans anliggningstryck mot objektet va- rieras. _ Ytterligare kännetecken på och fördelar med uppfinningen komer att framgå av de efterföljande patentkraven samt av följande beskrivning av en föredragen utföringsform. 15 20 25 30 35 s4d1aso-3 tent, thereby avoiding that the scraper abuts the object to be scraped for an unnecessarily long time. Suitably the oscillation is effected by means of an air cylinder, the center axis of which coincides with said axis of rotation. Suitable pneumatic on and off cylinders are used for on and off. By varying the pressure in its positive chamber, the abutment pressure of the scraper against the object can be varied. Further features and advantages of the invention will become apparent from the appended claims and from the following description of a preferred embodiment.

KORT FIGURBESKRIVNING I följande beskrivning av en föredragen utföringsform kommer att -hänvisas till bifogade ritningsfigurer, av vilka Fig. 1 visar skrapan enligt den föredragna utföringsformen i ' _ radiell riktning mot periferín av ett hjul som skall skrapas; Fig. 2 utgör en.vy II-II i Fig. 1; Fig. 3 visar en sektion III-III i Fíg. 1.BRIEF DESCRIPTION OF THE DRAWINGS In the following description of a preferred embodiment, reference will be made to the accompanying drawing figures, of which Fig. 1 shows the scraper according to the preferred embodiment in the radial direction towards the periphery of a wheel to be scraped; Fig. 2 is a view II-II in Fig. 1; Fig. 3 shows a section III-III in Fig. 1.

BESKRIVNING AV FÖREDRAGEN UTFÖRINGSFORM I Fig. 1 betecknas löphjulet till en bandsågmaskin med siffran 1.DESCRIPTION OF THE PREFERRED EMBODIMENT In Fig. 1, the impeller of a band saw is denoted by the number 1.

' Löphjulet har en konvext bomberad rotationsyta 2. I den i figurerna 'visade positionen anligger en klinga 3 på en skrapa 4 mot ytan 2.The impeller has a convexly bombed rotating surface 2. In the position shown in the figures, a blade 3 abuts a scraper 4 against the surface 2.

Klingans 3 egg 5 följer den välvda konturen på ytan 2.The blade 3 edge 5 follows the curved contour on the surface 2.

Klingan 3“är genom nitar 6 fästad på en klinghållare 7, som i sin tur är fastsvetsad vid en cylindrisk kolvtapp 8, som är vridbar omkring sin centrumaxel 9, i Fig. 3. Klinghållaren 7 uppvisar en slits 10, som sträcker sig parallellt utmed klingans 3 bakre kant. Syftet med slitsen 10 är att klingan 3 lätt skall kunna anpassas efter formen på den bomberade ytan 2. 15 20 25 8401050-3 Den cylindriska kolvtappen 8 är lagrad i en ändhylsa 11. Denna är via ett fäste 12 och en konsol 13 monterad på en fästplatta'14, som í sin tur är monterad på ett maskinstativ 15 medelst skruvar 16. I andra änden är cylindern 8 via ett radiallager 17 förenad med en tapp 18, som är förankrad i ett snett inborrat hål 19 i fästplattan 14. Ett stopp i cylinderns 8 främre ände har betecknats 20. I cylinderns 8 bakre ände och i ändhylsan 11 finns inloppsöppningar 21, 22 för tryckluft. En tryckluftledning har betecknats 23. Den genom ledningen 23 till cylinderns/kolvtappens 8 inre 24 tillförda luften åstad- kommer cylínderns 8 och därmed klínghållarens 7 och klingans 3 oscillerande rörelse parallellt med axeln 9. Slaglängden X be- 'stäms av stoppet 20 och av ett anslag 25 i cylinderns 8 motsatta ände. Cylinderns 8 returrörelse åstadkommes genom den kraft som det löpande hjulet 1 utövar mot klingan 3. Oscilleringen åstadkommes alltså genom att luft intermitent tillföres cylinderns 8 inre 24, varvid returrörelsen âstadkommes av det rörliga hjulet 1 genom dess inverkan mot skrapan, varigenom behovet av returfjäder eller mot- svarande elimineras.The blade 3 "is fastened by rivets 6 to a blade holder 7, which in turn is welded to a cylindrical piston pin 8, which is rotatable about its center axis 9, in Fig. 3. The blade holder 7 has a slot 10, which extends parallel along blade 3 rear edge. The purpose of the slot 10 is that the blade 3 can be easily adapted to the shape of the bombed surface 2. The cylindrical piston pin 8 is mounted in an end sleeve 11. This is mounted via a bracket 12 and a bracket 13 on a mounting plate 14, which in turn is mounted on a machine frame 15 by means of screws 16. At the other end, the cylinder 8 is connected via a radial bearing 17 to a pin 18, which is anchored in an obliquely drilled hole 19 in the mounting plate 14. A stop in the front end of the cylinder 8 has been designated 20. In the rear end of the cylinder 8 and in the end sleeve 11 there are inlet openings 21, 22 for compressed air. A compressed air line has been designated 23. The air supplied through the line 23 to the interior 24 of the cylinder / piston pin 8 causes the oscillating movement of the cylinder 8 and thus the blade holder 7 and the blade 3 parallel to the axis 9. The stroke X is determined by the stop 20 and by a stop 25 at the opposite end of the cylinder 8. The return movement of the cylinder 8 is effected by the force exerted by the impeller 1 against the blade 3. The oscillation is thus effected by intermittently supplying air to the interior 24 of the cylinder 8, the return movement being effected by the movable wheel 1 by its action against the scraper, thereby - respondents are eliminated.

Skrapan 4 kan fällas till och från hjulbanan 2 genom vridning om- kring vridningsaxeln 9 med hjälp av en luftcylinder 26. Denna är _ monterad mellan ett par fästöron 27 på konsolen 13 och ett par fäst- öron 28 på klinghållaren 7. Mellan luftcylindern 26 och fästöronen 28 är anordnad en kolvstång 29 och en kulled 30. Anslutningsledningar till den dubbelverkande luftcylindern 26 har betecknats 31 och 32.The scraper 4 can be folded to and from the wheel track 2 by rotation about the axis of rotation 9 by means of an air cylinder 26. This is mounted between a pair of mounting ears 27 on the bracket 13 and a pair of mounting ears 28 on the blade holder 7. Between the air cylinder 26 and the mounting ears 28 are provided with a piston rod 29 and a ball joint 30. Connecting lines to the double-acting air cylinder 26 have been designated 31 and 32.

Genom att variera trycket i anslutningsledningen 31 till till- och frånslagscylinderns pluskammare varieras skrapklingans 3 anliggnings- tryck mot hjulbanan 2.By varying the pressure in the connection line 31 to the positive chamber of the on and off cylinder, the abutment pressure of the scraper blade 3 against the wheel track 2 is varied.

Claims

8401050-3 10 15 20 25 30- PATENT REQUIREMENTS

Scraper for removing coatings or particles on the periphery of a rotating wheel or on an endless conveyor belt, characterized in that the scraper (3, 4) is inclined to the direction of movement of the object (2) to be scraping, that it is arranged oscillating in a direction parallel to the edge line (5) of the scraper, that the oscillation is effected by means of a single-acting air cylinder (8), that air is supplied intermittently to the cylinder, so that a piston member is moved in axial direction, and that the return movement is effected by the force of the movable object against the scraper, when the pressure is lowered in the cylinder.

2. A scraper according to claim 1, characterized in that the scraper can be folded up from and down towards the object by rotation about an axis of rotation (9) parallel to the direction of oscillation.

A scraper according to claim 2, characterized in that the center axis of the air cylinder (8) coincides with said axis of rotation (9).

A scraper according to claim 3, characterized in that the air cylinder consists of a cylindrical piston pin.

A scraper according to any one of the preceding claims, characterized in that the rotational movement is effected by means of a pneumatic on-and-off cylinder (26) arranged between a holder (7) for a scraper blade (3) and fastening means for the piston top.

A scraper according to claim 5, characterized in that the on and off cylinder (26) has a positive chamber, the working pressure of which can be varied to regulate the abutment pressure of the scraper against the object to be scraped.