SE466243B

SE466243B - Device for surface treatment, for example grinding or polishing, of walls or floors

Info

Publication number: SE466243B
Application number: SE8900272A
Authority: SE
Inventors: Arne Farden
Original assignee: Arne Farden
Priority date: 1989-01-26
Filing date: 1989-01-26
Publication date: 1992-01-20
Also published as: SE8900272D0; SE8900272L

Abstract

The invention concerns a device intended for surface treatment, for example grinding or polishing, of walls or floors and comprising a disc 10. Two or more sections of a sheet of grinding or polishing material 22 are releasably clamped over spring-mounted support elements 19, the sections being separate from each other in the circumferential direction. <IMAGE>

Description

466 243 10 15 20 25 30 35 medelst en kulled 12, en s k kullänk. Axeln är i sin andra ände lösbart förbunden med chucken 13 pä en kon- ventionell borrmaskin 14. Axeln ll är vridbart lagrad i en hylsa 15 med handtag 16, och denna hylsas läge pà axeln ll bestämmes av en ring 17, som är fastskruvbar i önskat läge pä axeln ll, varvid ett axiallager 18 är anordnat mellan ringen 17 och hylsan 15. 466 243 10 15 20 25 30 35 by means of a ball joint 12, a so-called ball link. The shaft at its other end is releasably connected to the chuck 13 of a conventional drilling machine 14. The shaft 11 is rotatably mounted in a sleeve 15 with handle 16, and the position of this sleeve on the shaft 11 is determined by a ring 17, which is screwable in the desired position on the shaft 11, an axial bearing 18 being arranged between the ring 17 and the sleeve 15.

Rondellens utförande är närmare visat i FIG 2-4.The design of the roundabout is shown in more detail in FIGS. 2-4.

Pà rondellens undersida är anordnade tre mjuka, elas- tiska gummikutsar 19, som är fördelade med lika vin- kelavstànd runt rondellen (1200). Gummikutsarna är sparade pá sina motsatta sidor, varvid spären pá den frán rondellen vända sidan sträcker sig fràn rondel- lens periferi mot dess centrum, medan spàren pá den motsatta sidan, som anligger mot rondellens undersida, sträcker sig i rät vinkel mot de förstnämnda spáren. I mellanrummen mellan gummikutsarna är anordnade kläm- backar 20 av metall eller plast, vilka är anspännbara mot rondellen medelst skruvar 21. Varje klämback har huvudsakligen parallellt med de angränsande gummikut- sarna förlöpande kanter. Över gummikutsarna är medelst klämbackarna fastspända fyrkantiga stycken 22 av ett arkformigt slipmaterial, exempelvis slipduk eller slippapper, sásom visas i FIG 3 och 4. Det finns sä- lunda ett fritt utrymme innanför de med slipmaterial försedda kutsarna och klämbackarna pä rondellens un- dersida, samtidigt som det i periferiell led finns fria utrymmen mellan de med slipmaterial försedda gum- mikutsarna, där klämbackarna är anordnade.On the underside of the roundabout are arranged three soft, elastic rubber cushions 19, which are distributed at equal angular distances around the roundabout (1200). The rubber pads are recessed on their opposite sides, the latches on the side facing away from the roundabout extending from the periphery of the roundabout towards its center, while the latches on the opposite side, which abut the underside of the roundabout, extend at right angles to the first-mentioned grooves. Arranged in the spaces between the rubber cushions are clamping jaws 20 of metal or plastic, which are clampable against the disc by means of screws 21. Each clamping jaw has extending edges substantially parallel to the adjacent rubber cushions. Square pieces 22 of a sheet-shaped abrasive material, for example sanding cloth or sandpaper, are fastened over the rubber pellets by means of the clamping jaws, as shown in Figs. 3 and 4. There is thus a free space inside the sanded and clamping jaws on the underside of the pad, at the same time as in the peripheral direction there are free spaces between the rubber pads provided with abrasive material, where the clamping jaws are arranged.

Dä slipdonet under användningen av detsamma ro- teras med ett varvtal pä exempelvis 300 à 400 varv/minut, erhàlles genom gummikutsarnas 19 elastici- tet en studsrörelse hos gummikutsarna, vilken förorsa- kar en wobblande rörelse hos rondellen, varvid denna rörelse ytterligare förstärkes genom att rondellen i 10 15 20 25 30 35 466 243 universalleden 12 är avvinklad relativt axeln. Slip- stoftet virvlar inte upp i omgivningsluften utan lig- ger till större delen kvar under rondellen i de mellan sektionerna av slipmaterial förefintliga hälrummen un- der backarna och tjänar därvid som ett slipmedel, vil- ket ökar avverkningen. Slipmaterialet sättes sälunda inte igen av slipstoftet, utan sliprondellen är själv- rensande, vilket innebär, att slipmaterialet bibehàl- ler sin skärpa under längre tid. De mjuka, elastiska gummikutsarna möjliggör ocksa, att man slipar ned i mindre svackor eller fördjupningar i den bearbetade ytan.When the grinding device is rotated during its use at a speed of, for example, 300 to 400 rpm, the elasticity of the rubber pads 19 results in a bouncing movement of the rubber pads, which causes a wobbling movement of the roundabout, this movement being further enhanced by the roundabout in the universal joint 12 is angled relative to the axis. The abrasive dust does not swirl up in the ambient air, but for the most part remains under the roundabout in the cavities between the sections of abrasive material under the slopes and thereby serves as an abrasive, which increases felling. The abrasive material is thus not blocked by the abrasive dust, but the abrasive disc is self-cleaning, which means that the abrasive material maintains its sharpness for a longer period of time. The soft, elastic rubber pads also make it possible to grind into smaller depressions or depressions in the machined surface.

I FIG l visas slipdonet inställt för slipning av golv, och det framgär, att denna slipning kan ske i upprät arbetsställning. Vid väggarbeten flyttas lämp- ligen hylsan 15 närmare rondellen genom att ringen 17 lossas och placeras i ett mot rondellen förskjutet lä- ge, i vilket den sedan fixeras.Fig. 1 shows the grinding device set for grinding floors, and it can be seen that this grinding can take place in an upright working position. During wall work, the sleeve 15 is suitably moved closer to the roundabout by loosening the ring 17 and placing it in a position offset towards the roundabout, in which it is then fixed.

När sä erfordras, kan slipmaterialet lätt utbytas genom att man lossar spännbackarna 20 och sätter in nytt slipmaterial, som fastspännes över gummikutsarna.When required, the abrasive material can be easily replaced by loosening the clamping jaws 20 and inserting new abrasive material, which is clamped over the rubber pads.

Det beskrivna donet kan även användas för pole- ring av ytor, varvid slipmaterialet utbytes mot skinn, filt eller liknande polermaterial.The described device can also be used for polishing surfaces, whereby the abrasive material is exchanged for leather, felt or similar polishing material.

Det framgär, att slip- eller polerdonet enligt uppfinningen är av mycket enkelt utförande, varigenom det kan framställas till lag kostnad, sä mycket mera som särskild drivmotor inte ingàr i slip- eller poler- donet utan detta pä enkelt sätt kan anslutas till en konventionell borrmaskin.It appears that the grinding or polishing device according to the invention is of a very simple design, whereby it can be manufactured at legal cost, all the more so as a special drive motor is not included in the grinding or polishing device but this can be easily connected to a conventional drilling machine. .

Det visade och beskrivna utförandet kan modifie- ras. Exempelvis kan gummikutsarna ersättas med andra fjädrande stödelement. I det visade utförandet är tre gummikutsar resp stödelement anordnade, men generellt gäller, att det kan finnas tvä eller flera gummikutsar resp stödelement.The shown and described embodiment can be modified. For example, the rubber pads can be replaced with other resilient support elements. In the embodiment shown, three rubber cushions or support elements are arranged, but in general it may be that there may be two or more rubber cushions or support elements.

Claims

466 243 10 15 20 25 30 35 4 PATENT CLAIMS

1. A device for surface treatment, for example grinding or polishing, of walls or floors, comprising a disc (10) arranged on a central drive shaft (II), on which sheet-shaped abrasive or polishing material (22) is releasably clamped over two or more circumferentially spaced apart, resilient radial support elements (19), characterized in that individual sections of the material are clamped to the disc at their edge portions by means of clamping jaws (20) , which has a shape adapted to the spaces between the support elements and forms the bottom of recesses formed by these spaces for discharging material harvested from the treated surface, and that the disc is connected to the drive shaft by means of a universal joint (12) to allow a rocking motion of the disc during its rotation with the abrasive or polishing material applied to the treated surface, whereby the felled material is shaken loose from the abrasive or polishing material and more gentle treatment of surfaces with minor depressions / elevations are made possible.

Device according to Claim 1, characterized in that the support elements (19) consist of soft, elastic rubber cushions. It is known that the rubber pads (19) are stored on opposite sides with the grooves on one side arranged on the transverse side of the grooves on the other side. Device according to one of Claims 1 to 3, characterized in that the drive shaft (II) is mounted in a sleeve (15) which is displaceable on the shaft and provided with a handle (16). A device according to claim 4,

Device according to Claim 2, characterized by a stop ring (17) which can be clamped on the shaft in different axial positions between the sleeve (15) and the disc (10).