DK150337B

DK150337B - APPLICATION FOR LIQUIDIZING OF PRECEDED CONCRETE

Info

Publication number: DK150337B
Application number: DK163878AA
Authority: DK
Inventors: Per Carlstroem; Bo Lundberg; Gert Persson
Original assignee: Dynapac Maskin Ab
Priority date: 1977-05-12
Filing date: 1978-04-14
Publication date: 1987-02-09
Also published as: NO143640C; IT7809451A0; DK150337C; FI60756C; GB1588675A; AU515486B2; DE2819653A1; DE2819653C2; BE867044A; NO143640B; FR2389731A1; AU3491278A; FI60756B; FI780994A; DK163878A; FR2389731B1; JPS53140826A; JPS638259B2; SE400600B; BR7802536A

Description

i 150337in 150337

Opfindelsen angår et apparat til udglatning af nylagt beton omfattende en omkring en lodret akse roterbar rotor, som er udstyret med to eller flere radialt rettede og i hovedsagen vandret orienterede arme, på hver af hvilke arme et arbejds-5 organ i form af en vingelignende plade er drejeligt lejret, og hvorved vinklen mellem pladens plan og betonfladen kan ændres ved hjælp af en reguleringsmekanisme.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for smoothing concrete, comprising a rotor about a vertical axis, which is equipped with two or more radially directed and generally horizontally oriented arms, on each of which a working member in the form of a wing-like plate is rotatably mounted, whereby the angle between the plane of the slab and the concrete surface can be changed by means of a regulating mechanism.

Når nylagt beton færdigbehandles ved hjælp af roterende ar-10 bejdsorganer af den omhandlede art, er der en tendens til, at vandet i betonen siver op til overfladen. Denne volumenforøgelse nødvendiggør en successiv ændring af vinklen mellem de vin-gelignende arbejdsorganer og betonoverfladen. Det er ønskeligt, at denne ændring sker, medens maskinen arbejder og på en 15 for operatøren praktisk måde.When freshly laid concrete is finished by means of rotary work members of the kind in question, there is a tendency for the water in the concrete to seep to the surface. This volume increase necessitates a successive change of the angle between the wine-like work organs and the concrete surface. It is desirable that this change be made while the machine is operating and in a practical way for the operator.

I US-patenskrift nr. 2.882.806 er beskrevet et apparat af denne art, hvor rotoren omfatter et centralt hus. På den i huset værende ende af rorotarmene er anbragt en knast, der hviler 20 mod en knastskive således, at når knastskiven påvirkes i lodret retning af en hydraulisk cylinder, drejes rotorarmene en vinkel, hvorved arbejdsorganernes angrebsvinkel til betonoverfladen ændres. Fælles for dette apparat og andre kendte apparater er dog, at den del af reguleringsmekanismen, som direkte 25 samvirker med de vingelignende arbejdsorganer er ret kompliceret, idet den f.eks. udgøres af vægtstangsarme og samle-led, og er monteret således på apparatet, at det let kommer i direkte kontakt med betonen, hvilket nødvendiggør stadig inspektion og rensning. Disse apparater er derfor ikke særlig 30 pålidelige og driftssikre.US Patent No. 2,882,806 discloses an apparatus of this kind in which the rotor comprises a central housing. On the end of the housing of the rotor arms is arranged a cam resting 20 against a cam disk such that when the cam disk is actuated vertically by a hydraulic cylinder, the rotor arms are rotated at an angle, thereby changing the angle of attack of the working surface to the concrete surface. However, what is common to this apparatus and other known apparatus is that the part of the control mechanism which directly interacts with the wing-like working members is rather complicated, for example. consists of lever arms and joints, and is mounted on the apparatus so that it comes into direct contact with the concrete, which still requires inspection and cleaning. These devices are therefore not very reliable and reliable.

Formålet med opfindelsen er at tilvejebringe et apparat til udglatning af nylagte betonflader, og som er driftsikkert og pålideligt, og omfatter en simpelt udformet reguleringsmekanis-35 me til under drift at påvirke arbejdsorganerne således at disses vinkel til betonoverfladen ændres.The object of the invention is to provide an apparatus for smoothing freshly laid concrete surfaces, which is reliable and reliable, and comprises a simple designed control mechanism for influencing the working members so that their angle to the concrete surface is changed.

Apparatet ifølge opfindelsen er ejendommeligt ved, at den del af reguleringsmekanismen som direkte påvirker arbejdsorganerne 2 150337 til drejning, udgøres af et stempel, som er omsluttet af og er indrettet aksialt forskydeligt i en styrecylinder, der er fast forbundet med rotorens midterste del, samt anslagsorganer på ar-bejdsorganerne, som ligger an mod stemplet.The apparatus according to the invention is characterized in that the part of the regulating mechanism which directly affects the working means 2 for turning is constituted by a piston which is enclosed by and arranged axially displaceable in a control cylinder which is fixedly connected to the middle part of the rotor, as well as stop means. on the working members which abut the piston.

5 Herved opnås, at der tilvejebringes et apparat til udglatning af nylagt beton og som muliggør, at arbejdsorganernes vinkel til betonoverfladen via en reguleringsmekanisme kan andres under brugen af apparatet, og hvor reguleringsmekanismen er simpelt opbygget og kan indrettes, så den er indkapslet mod udefra kommende smuds 10 således at apparatet er pålideligt og driftsikkert.5 This provides an apparatus for smoothing freshly laid concrete and enabling the angle of the working members to the concrete surface to be changed via a regulating mechanism during the use of the apparatus, and wherein the regulating mechanism is simply constructed and can be arranged so that it is encapsulated from outside dirt 10 so that the apparatus is reliable and reliable.

Ifølge opfindelsen kan hver af arbejdsorganerne, som udgøres af en vingelignende plade, være fast monteret i en langstrakt holder, der er drejeligt lejret·på en rotorarm, og holderen kan i 15 sin mod rotorens centrum vendende del være forsynet med et anslagsorgan i form af en tap eller skrue, der strækker sig vinkelret på holderens drejningsakse og er indrettet til at samvirke med stemplet. Herved kan stemplet på særlig simpel måde på- ! virke holderne til drejning, således at arbejdsorganernes vinkel 20 til betonoverfladen ændres.According to the invention, each of the working members constituted by a wing-like plate can be fixedly mounted in an elongated holder rotatably mounted on a rotor arm, and the holder can be provided with a stop means in the form of a rotating arm in the center of the rotor. a pin or screw extending perpendicular to the pivot axis of the holder and adapted to cooperate with the piston. In this way, the stamp can be used in a particularly simple way! actuate the holders for rotation so that the angle of the working members 20 to the concrete surface is changed.

Ved en særlig fordelagtigt udførelsesform kan ifølge opfindelsen den øverste del af stemplet være udformet som en konus eller et prisme og det i holderen anbragte anslagsorgan udgøres af en 25 justeringsskrue, som er indskruet vinkelret på holderens drejningsakse og har en sådan størrelse, at dens inderste ende strækker sig ind gennem åbninger i styrecylinderen og hviler mod den koniske del af stemplet, når arbejdsorganernes plane arbejdsflade danner en vinkel med betonoverfladen. Herved kan 30 hvert arbejdsorgans vinkel til betonoverfladen før brugen af apparatet ved hjælp af det pågældende arbejdsorgans justeringsskrue indstilles således, at alle arbejdsorganerne uanset stemplets stilling har samme vinkel til betonoverfladen.In a particularly advantageous embodiment, according to the invention, the upper part of the piston may be formed as a cone or prism and the abutment means arranged in the holder is constituted by an adjusting screw screwed perpendicular to the pivot axis of the holder and having its size so that its inner end extends through openings in the guide cylinder and rests against the tapered portion of the piston as the planar work surface of the working members forms an angle with the concrete surface. Hereby, the angle of each working member to the concrete surface before the use of the apparatus can be adjusted by means of the adjusting screw of the working member so that all the working members, regardless of the position of the piston, have the same angle to the concrete surface.

35 . Opfindelsen beskrives nærmere i det følgende med henvisning til tegning, hvor .fig. 1 viser apparatet ifølge opfindelsen til udglatning af 3 150337 nylagt beton set i perspektiv, og fig. 2 en særlig fordelagtig udførelsesform af apparatet ifølge opfindelsen med organer til justering af de vin-5 gelignende arbejdsorganer.35. The invention is described in more detail below with reference to the drawing, in which .fig. 1 is a perspective view of the apparatus according to the invention for smoothing concrete laid down, and FIG. 2 shows a particularly advantageous embodiment of the apparatus according to the invention with means for adjusting the angular-like working members.

Det i fig. 1 viste apparat til udglatning af nylagt, ikke størknet beton består af en rotor 1, som er forsynet med fire arme. Rotoren 1 understøttes af arbejdsorganer 2, som er dre-10 jeligt lejrede på hver arm. Lodret over rotoren 1 er monteret en motor 3, som er drivforbundet med rotoren 1 gennem en geartransmission 4, således at rotoren 1 og dens 4 arbejdsorganer 2 drejer rundt om den i hovedsagen lodrette rotationsakse.The FIG. 1, the apparatus for smoothing freshly laid concrete has consisted of a rotor 1 provided with four arms. The rotor 1 is supported by working members 2 which are pivotally mounted on each arm. Vertically above the rotor 1 is mounted a motor 3, which is drivenly connected to the rotor 1 through a gear transmission 4, so that the rotor 1 and its working members 2 rotate about the generally vertical axis of rotation.

15 Apparatet styres ved hjælp af en styrestang 5, som er lejret vippeligt på geartransmissionens hus 4', og som ved sin øverste ende bærer et håndtag 6, der er specielt konstrueret til at brugeren kan håndtere apparatet.The apparatus is controlled by a control rod 5, which is tiltably mounted on the gearbox housing 4 'and which carries at its upper end a handle 6 specially designed for the user to handle the apparatus.

20 Vinklen mellem de på rotorarmene drejeligt lejrede arbejdsorganer 2 og overfladen, der skal behandles, justeres ved hjælp af en justeringsknap 7, som er anbragt ved den øverste ende af armen 5, og som via en wire 8 er forbundet med et stempel 9, der er anbragt i midten af apparatet koaksialt med rotorens 25 omdrejningsakse. Stemplet er helt indesluttet i en styrecylinder 10, der udgøres af et cylindrisk parti af rotorens nav 11. Stemplet 9 kan bevæges aksialt i forhold til styrecylinderen 10 ved betjening af knappen 8 og den dermed forbundre wire 8. Stemplet 9 er imidlertid monteret således, at det drejer sam-30 men med styrecylinderen 10, når den korsformede rotor trækkes rundt af motoren 3. For at forhindre wiren 8 i også at rotere er den lejret drejeligt inden i stemplet 9.The angle between the working members 2 pivotally mounted on the rotor arms and the surface to be treated is adjusted by means of an adjustment knob 7, which is arranged at the upper end of the arm 5 and which is connected via a wire 8 to a piston 9 which is arranged in the center of the apparatus coaxially with the axis of rotation of the rotor 25. The piston is completely enclosed in a control cylinder 10 which is constituted by a cylindrical portion of the rotor hub 11. The piston 9 can be moved axially with respect to the control cylinder 10 by operating the button 8 and the associated wire 8. However, the piston 9 is mounted such that it rotates together with the control cylinder 10 as the cruciform rotor is pulled around by the motor 3. In order to prevent the wire 8 from also rotating it is rotatable within the piston 9.

Hver af apparatets arbejdsorganer 2 til udglatning af beton-3 5 fladen består af en vingel ignende plade, der er fast monteret i en langstrakt holder 12. Hver holder 12 er monteret på en rotorarm og strækker sig langs den største del af rotorarmens længde. For at vinklen mellem den vingelignende plades arbejds-Each of the apparatus's working members 2 for smoothing the concrete surface consists of a wing flanged plate fixedly mounted in an elongated holder 12. Each holder 12 is mounted on a rotor arm and extends along the greater part of the length of the rotor arm. To make the angle between the blade-like plate work

Claims

150337 surface and the concrete surface can be changed, the holder 12 is pivotally mounted on the rotor arm. Each holder 12 is provided with an adjustment screw 13 which is screwed into the holder 12 perpendicular to its axis of rotation, so that the inner end of the screw 13 projects into the guide cylinder 10 through an opening 10 'and rests on an upper tapered portion of the piston 9. As the piston 9 is moved axially by turning the adjusting knob 7 and thus displacing the wire 8, the adjusting screws 13 are actuated, forcing the holders 12 with the working members 2 to turn so that the angle between the working surface of the working members and the concrete surface is changed. It is important that all the working members form the same angle with the concrete surface and this is achieved by the adjusting screws 13. By their interaction with the tapered part of the piston 9 it is possible to make separate adjustment of the angle between each working member 2 and the concrete surface. . Preferably, a first adjustment should be made on a flat surface, the adjustment screws 13 being unscrewed so far that their inner ends do not touch the piston 9, in which position the working members lie flat against the substrate on which they rest. The adjustment knob 7 is turned until the wire 8 has no tension whatsoever. Then the adjusting screws are screwed in until they rest lightly on the tapered portion of the piston 9, then the wire 8 is tightened and all the working members 2 are simultaneously adjusted to the desired angle to the concrete surface. In the illustrated embodiment, the adjusting button 7 is provided with a rod 14 which extends into the upper tubular part 15 of the guide rod 5. At its lower end the rod is threaded and screwed into an intermediate piece 16 which can slide axially in the tube and to whose opposite end the wire 8 is attached. As the knob 7 is rotated, the intermediate piece 16 is displaced axially in the tube 15 and a corresponding displacement of the piston 9 and thus rotation of the working members 2 takes place.

35 Patent claims,

An apparatus for smoothing freshly laid concrete, which apparatus has a rotor about a vertical axis, which is equipped with two