EP0480464B1 - Floor surfacing device - Google Patents

Floor surfacing device Download PDF

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Publication number
EP0480464B1
EP0480464B1 EP91117388A EP91117388A EP0480464B1 EP 0480464 B1 EP0480464 B1 EP 0480464B1 EP 91117388 A EP91117388 A EP 91117388A EP 91117388 A EP91117388 A EP 91117388A EP 0480464 B1 EP0480464 B1 EP 0480464B1
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EP
European Patent Office
Prior art keywords
blade
working surface
floorings according
floorings
angle
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EP91117388A
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German (de)
French (fr)
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EP0480464A1 (en
Inventor
Peter Leinsle
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Individual
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Individual
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L13/00Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/02Scraping
    • A47L13/08Scraping with scraping blades
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/006Arrangements for removing of previously fixed floor coverings

Definitions

  • the invention relates to a device for pulling floors according to the type mentioned in the preamble of claim 1.
  • Devices of this type facilitate the removal of floor coverings and the residues which often remain after the floor coverings have been removed.
  • the present invention has for its object to provide a device of the above type, which works more effectively than known devices of this type.
  • the range specified for the angle between the movement tangent and the cutting edge achieves an optimal machining effect.
  • the width of the working tracks increases with increasing angle.
  • the work movement changes from a cutting to a pulling movement.
  • An angle between 2 and 15 ° has proven to be particularly expedient.
  • Such cutting edges also have the advantage that they regrind themselves.
  • Claim 3 relates to a development of the present invention, in which the knives hit the work surface at an angle. This increases the cutting action and, with a corresponding length of the knives, bending of the knives currently in contact with the work surface can be achieved, as a result of which the contact pressure of the cutting edges on the work surface and the overall working width is increased.
  • Claim 4 relates to a preferred embodiment in which the knives are made of elastic steel sheet, which ensures good bending properties of the knives.
  • the knives also strike the work surface at an angle of 10 ° to 30 °, resulting in a particularly effective cutting movement.
  • a further preferred embodiment results from claim 5. Tilting the knife about its radial axis enables the cutting edge to lie in its entire length in the working surface despite its angle to the tangent of the circular movement, whereby an optimal pulling cutting movement is achieved.
  • Claim 6 specifies a development of the invention in which the knives have a kink running parallel to the working edge within their free end, which in turn results in the entire working edge resting on the work surface. This in turn results in an optimal pulling cutting movement.
  • An orientation of the axis of rotation at an angle between 0 ° and 5 ° in the working direction to the work surface has proven to be expedient. With decreasing angle to the vertical, the arc-shaped working surface within which the working knives meet the working surface increases, and thus the working width of the device.
  • Claim 8 relates to a development of the invention, in which the tips of the blade coming into contact with the work surface have a wedge-shaped profile which is designed such that one side of the wedge comes to rest in the work surface and the other side of the wedge in one level with the surface of the remaining knife blade adjoining this side of the wedge.
  • Such profiles grind themselves automatically.
  • Claim 10 specifies a development in which a device for receiving a weight is provided on the device.
  • a hollow body made of plastic with a screw cap could serve for this purpose, which can be filled up with water or other substances at the work site. On the one hand, this increases the loading pressure, on the other hand, the weight can be removed again during the transport of the device.
  • Claim 11 specifies a development of the device according to the invention in which the chassis has one stop each on the left and right corners lying in the direction of movement.
  • the stops are arranged so that their outermost connecting line is just reached by the rotating knives.
  • claim 12 relates to a development of the present invention, in which the chassis is driven by the motor.
  • all knives are in the work area at the same time on what is achieved by a vertical axis of rotation.
  • the knives are preferably rigid and the entire device should be stable and heavy. A high dead weight prevents the device from rotating due to the forces acting on the knives.
  • the device is operated via a handle 14 attached to the arm 13 and an operating switch 15 also attached to the arm 13. During operation, the knives run at a constant speed around the axis (approx. 500-1000 rpm).
  • Fig. 2 shows a bottom view of the embodiment.
  • the knives 6 are fastened on the underside of the carrier disk 5.
  • stops 16 are provided, the outermost connecting line of which is just reached by the rotating knives.
  • Fig. 3 shows in detail the front part of a knife blade with cutting edge 7. It can be seen that the cutting edge 7 includes an angle with the tangent to the circle of motion, whereby the end of the cutting edge leading in the direction of movement rotates on a smaller radius than that Moving end of the cutting edge. Such a course of the cutting edge causes a cutting and at the same time pulling working movement of the knife on the work surface, which is an important feature according to the invention. In addition to the better work results that can be achieved as a result, the service life of the knives is also increased, since such cutting edges continuously grind themselves on the surface of the floor.
  • FIG. 4 shows a section running perpendicular to the radial direction of a knife with the carrier disk lying above it.
  • An oblique position of the knives about a radial axis from the plane of the carrier disk can be achieved by means of a pair of carrier plates 17 of wedge-shaped design. This ensures that the entire length of the cutting edge rests on the work surface, although the cutting edge is at an angle to the central axis of the knife or to the tangent to the circular movement.
  • the carrier disk is designed to taper from the outside to the inside over the area of an outer disk.
  • a knife can be attached to the mounting surface which is thereby inclined relative to the plane of the carrier disc.
  • an even larger angle of incidence can thereby be achieved.
  • Fig. 6 shows another way of attaching the knife to the carrier disc.
  • the required inclination of the knife blades 6 is achieved by a kink within the free, unscrewed end of the knife.
  • the kink should be approximately 15 ° and the kink line expediently runs parallel to the working edge 7 when viewed in plan view, which produces the same effect that was explained in the description of FIG. 4.
  • FIG. 7 shows a further embodiment of the device according to the invention.
  • the machine can be moved laterally. This displacement can be countered by a second counter-rotating cutting device.
  • Two cutting devices are provided next to each other in the direction of travel and rotating around parallel axes. The directions of rotation are chosen so that the detached residues can be transported to the outside.
  • the knives of both cutters interlock so that the working path of the two cutters come to lie side by side.
  • the number and size of the trade fair have been chosen so that a smooth meshing is guaranteed.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Knives (AREA)
  • Coating Apparatus (AREA)

Abstract

The invention relates to a floor stripping device having an undercarriage (1), which can be moved on the floor, a motor (2), which is arranged on the undercarriage (1), and at least one cutting device which is driven by the motor (2) and is effective in an operating surface dropping into the surface of the floor. It is distinguished by the fact that the cutting device has at least one knife (6) which is rotatable about an essentially vertical axis, and that the knife is constructed and arranged in such a way that its cutting edge lies in the said operating surface and assumes an angle smaller than 30 DEG relative to the tangent of the circular movement, the end of the cutting edge which is leading in terms of movement lying on a smaller radius than the end which is trailing in terms of movement. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Abziehen von Fußböden nach der im Oberbegriff des Anspruchs 1 genannten Art.The invention relates to a device for pulling floors according to the type mentioned in the preamble of claim 1.

Vorrichtungen dieser Art erleichtern das Entfernen von Bodenbelägen und den nach dem Ablösen von Bodenbelägen oft noch verbleibenden Resten.Devices of this type facilitate the removal of floor coverings and the residues which often remain after the floor coverings have been removed.

Die Mehrzahl der bisher bekannten Geräte der gattungsbildenden Art weisen ein quer zur Arbeitsrichtung liegendes Messer auf, das zum Abtragen von Bodenbelägen oder Resten von Bodenbelägen in stoßende oder oszillierende Bewegung versetzt wird.The majority of the devices of the generic type known hitherto have a knife which lies transversely to the working direction and which is set in abutting or oscillating movement in order to remove floor coverings or remnants of floor coverings.

Derartige Geräte verlangen einen erheblichen Druck in Stoßrichtung der Messer, der von den Bedienungspersonen aufgebracht werden muß.Such devices require considerable pressure in the direction of the knife, which must be applied by the operators.

Desweiteren erzeugen die bisher bekannten Geräte unerwünscht laute Arbeitsgeräusche, tragen den zu entfernenden Bodenbelag nur langsam und in nicht schonender Weise für den Untergrund ab.Furthermore, the previously known devices produce undesirably loud working noises, only remove the floor covering to be removed slowly and in a non-gentle manner for the subsurface.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der obigen Art anzugeben, die gegenüber bekannten Vorrichtungen dieser Art effektiver arbeitet.The present invention has for its object to provide a device of the above type, which works more effectively than known devices of this type.

Diese Aufgabe wird durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in the characterizing part of claim 1.

Eine bevorzugte Weiterbildung ergibt sich aus Anspruch 2. Durch den darin angegebenen Bereich für den Winkel zwischen Bewegungskreistangente und Schneidkante wird eine optimale Bearbeitungswirkung erzielt. Prinzipiell vergrößert sich mit zunehmendem Winkel die Breite der Arbeitsbahnen. Die Arbeitsbewegung geht dabei von einer schneidenden in eine ziehende Bewegung über. Als besonders zweckmäßig hat sich ein Winkel zwischen 2 und 15° herausgestellt. Derartig verlaufende Schneidkanten bieten außerdem den Vorteil, daß sie sich selbsttätig nachschleifen.A preferred further development results from claim 2. The range specified for the angle between the movement tangent and the cutting edge achieves an optimal machining effect. In principle, the width of the working tracks increases with increasing angle. The work movement changes from a cutting to a pulling movement. An angle between 2 and 15 ° has proven to be particularly expedient. Such cutting edges also have the advantage that they regrind themselves.

Anspruch 3 bezieht sich auf eine Weiterbildung der vorliegenden Erfindung, bei der die Messer unter einem Winkel auf die Arbeitsfläche stoßen. Dies erhöht die Schneidwirkung und bei entsprechender Länge der Messer kann ein Durchbiegen der momentan mit der Arbeitsfläche in Berührung stehenden Messer erreicht werden, wodurch der Anpreßdruck der Schneidkanten auf die Arbeitsfläche und die Gesamt-Arbeitsbreite vergrößert wird.Claim 3 relates to a development of the present invention, in which the knives hit the work surface at an angle. This increases the cutting action and, with a corresponding length of the knives, bending of the knives currently in contact with the work surface can be achieved, as a result of which the contact pressure of the cutting edges on the work surface and the overall working width is increased.

Anspruch 4 bezieht sich auf eine bevorzugte Ausführungsform, bei der die Messer aus elastischem Stahlblech gefertigt sind, wodurch gute Biegungseigenschaften der Messer gewährleistet sind. Bei dieser Ausführungsform stoßen die Messer außerdem unter einem Winkel von 10° bis 30° auf die Arbeitsfläche wodurch eine besonders wirkungsvolle Schneidbewegung zustande kommt.Claim 4 relates to a preferred embodiment in which the knives are made of elastic steel sheet, which ensures good bending properties of the knives. In this embodiment, the knives also strike the work surface at an angle of 10 ° to 30 °, resulting in a particularly effective cutting movement.

Eine weitere bevorzugte Ausführungsform ergibt sich aus Anspruch 5. Ein Kippen der Messer um ihre radiale Achse ermöglicht, daß die Schneidkante trotz ihres Winkels zur Tangente der Kreisbewegung in ihrer gesamten Länge in der Arbeitsfläche aufliegt, wodurch eine optimale ziehende Schneidbewegung erreicht wird.A further preferred embodiment results from claim 5. Tilting the knife about its radial axis enables the cutting edge to lie in its entire length in the working surface despite its angle to the tangent of the circular movement, whereby an optimal pulling cutting movement is achieved.

Anspruch 6 gibt eine Weiterbildung der Erfindung an, bei der die Messer innerhalb ihres freien Endes einen zur Arbeitskante parallel verlaufenden Knick aufweisen wodurch wiederum ein Aufliegen der gesamten Arbeitskante in der Arbeitsfläche erreicht wird. Es ergibt sich dadurch wiederum eine optimale ziehende Schneidbewegung.Claim 6 specifies a development of the invention in which the knives have a kink running parallel to the working edge within their free end, which in turn results in the entire working edge resting on the work surface. This in turn results in an optimal pulling cutting movement.

Eine weitere bevorzugte Weiterbildung ergibt sich aus Anspruch 7. Als zweckmäßig hat sich eine Ausrichtung der Drehachse in einem Winkel zwischen 0° und 5° in Arbeitsrichtung zur Arbeitsfläche herausgestellt. Mit abnehmendem Winkel zur Senkrechten vergrößert sich die bogenförmige Arbeitsfläche innerhalb derer die Arbeitsmesser auf die Arbeitsfläche treffen, und damit die Arbeitsbreite der Vorrichtung.A further preferred development results from claim 7. An orientation of the axis of rotation at an angle between 0 ° and 5 ° in the working direction to the work surface has proven to be expedient. With decreasing angle to the vertical, the arc-shaped working surface within which the working knives meet the working surface increases, and thus the working width of the device.

Anspruch 8 bezieht sich auf eine Weiterbildung der Erfindung, bei der die mit der Arbeitsfläche in Berührung kommenden Spitzen der Klinge ein keilförmiges Profil aufweisen, das so ausgebildet ist, daß eine Seite des Keils in der Arbeitsfläche zum liegen kommt und die andere Seite des Keils in einer Ebene mit der an diese Seite des Keils anschließenden Fläche der übrigen Messerklinge liegt. Derartige Profile schleifen sich selbsttätig nach.Claim 8 relates to a development of the invention, in which the tips of the blade coming into contact with the work surface have a wedge-shaped profile which is designed such that one side of the wedge comes to rest in the work surface and the other side of the wedge in one level with the surface of the remaining knife blade adjoining this side of the wedge. Such profiles grind themselves automatically.

In Anspruch 9 ist eine Weiterbildung angegeben, bei der zwei Schneidrichtungen vorgesehen sind, die im wesentlichen in Fahrtrichtung nebeneinander angeordnet sind und um parallele Achsen gegensinnig zueinander drehen. Es kann dadurch ein Ausgleich der Gegenkräfte beim Auftreffen der Messer auf der Arbeitsfläche erreicht und eine Versetzung der Vorrichtung verhindert werden. Die Messer beider Schneidvorrichtungen können dabei ineinandergreifen, wodurch die Arbeitsbahnen beider Schneidvorrichtungen nebeneinander zum Liegen kommen. Die Anzahl und Größe der Messer darf, um ein reibungsloses Ineinandergreifen zu ermöglichen, nicht zu groß gewählt werden.In claim 9, a development is specified in which two cutting directions are provided, which are arranged essentially next to one another in the direction of travel and rotate in opposite directions about parallel axes. This can compensate for the counterforces when the knives strike the work surface and prevent the device from being displaced. The knives of both cutters can interlock, whereby the working paths of both cutting devices come to rest next to each other. The number and size of the knives must not be too large in order to enable smooth interlocking.

Anspruch 10 gibt eine Weiterbildung an, bei der an der Vorrichtung eine Einrichtung zur Aufnahme eines Gewichtes vorgesehen ist. Vorzugsweise könnte dafür ein Hohlkörper aus Kunststoff mit Schraubverschluß dienen, der an der Arbeitsstelle mit Wasser oder anderen Stoffen aufgefüllt werden kann. Dadurch wird einerseits der Belastungsdruck erhöht, andererseits kann während des Transports der Vorrichtung das Gewicht wieder entfernt werden.Claim 10 specifies a development in which a device for receiving a weight is provided on the device. Preferably, a hollow body made of plastic with a screw cap could serve for this purpose, which can be filled up with water or other substances at the work site. On the one hand, this increases the loading pressure, on the other hand, the weight can be removed again during the transport of the device.

Anspruch 11 gibt eine Weiterbildung der erfindungsgemäßen Vorrichtung an bei der das Fahrgestell auf der in Bewegungsrichtung vorne liegenden linken und rechten Ecke je einen Anschlag aufweist. Die Anschläge sind dabei so angeordnet, daß deren äußerste Verbindungslinie von den rotierenden Messern gerade erreicht wird. Ein Vorteil dieser Ausführung liegt in der Möglichkeit eine Beschädigung zwischen dem aufsteigenden Mauerwerk und den drehenden Messern zu verhindern und eine Bearbeitung des Bodens bis unmittelbar vor die Wand zu ermöglichen. Ein weiterer Vorteil der Anschläge besteht in der Möglichkeit für die Bedienungsperson die momentan bearbeitete Fläche genau abzuschätzen.Claim 11 specifies a development of the device according to the invention in which the chassis has one stop each on the left and right corners lying in the direction of movement. The stops are arranged so that their outermost connecting line is just reached by the rotating knives. An advantage of this design is the possibility of preventing damage between the ascending masonry and the rotating knives and to allow the floor to be worked right up to the wall. Another advantage of the stops is the possibility for the operator to precisely estimate the area currently being worked on.

Anspruch 12 schließlich bezieht sich auf eine Weiterbildung der vorliegenden Erfindung, bei der das Fahrgestell durch den Motor angetrieben wird. Außerdem liegen alle Messer gleichzeitig in der Arbeitsfläche auf, was durch eine senkrecht stehende Drehachse erreicht wird. Die Messer sind vorzugsweise starr ausgebildet und die gesamte Vorrichtung soll stabil und schwer ausgeführt sein. Durch ein hohes Eigengewicht wird ein Verdrehen der Vorrichtung aufgrund der an den Messern angreifenden Kräfte verhindert.Finally, claim 12 relates to a development of the present invention, in which the chassis is driven by the motor. In addition, all knives are in the work area at the same time on what is achieved by a vertical axis of rotation. The knives are preferably rigid and the entire device should be stable and heavy. A high dead weight prevents the device from rotating due to the forces acting on the knives.

Anhand der Fig. 1 bis 7 werden bevorzugte Ausführungsformen der Erfindung erläutert.1 to 7, preferred embodiments of the invention are explained.

Es zeigen im einzelnen:

Fig. 1
eine Seitenansicht des nachstehend ausführlich beschriebenen Ausführungsbeispiels der erfindungsgemäßen Vorrichtung,
Fig. 2
eine Unteransicht der Vorrichtung,
Fig. 3
eine Teilansicht eines Messers,
Fig. 4
einen parallel zur tangentialen Richtung des Umlaufkreises verlaufenden Teilschnitt durch ein Messer und darüberliegender Trägerscheibe,
Fig. 5
einen radial ausgeführten Teilschnitt durch ein Messer und darüberliegender Trägerscheibe,
Fig. 6
einen weiteren radialen Teilschnitt durch ein geknicktes Messer und darüberliegender Trägerscheibe,
Fig. 7
eine weitere vorteilhafte Ausführungsform der vorliegenden Erfindung
Fig. 1 zeigt eine Seitenansicht eines Ausführungsbeispiels der erfindungsgemäßen Vorrichtung. Auf einem Fahrgestell 1 befindet sich ein darauf montierter Motor 2 mit Untersetzungsgetriebe 3. Über eine mit einem Getriebe verbundene Antriebswelle 4 kann eine aus Trägerscheibe 5 und Messern 6 bestehende Schneidvorrichtung in eine Drehbewegung versetzt werden. Mit einer an den vorderen und hinteren Rädern angeordneten Vorrichtung zur Höhenverstellung (nicht eingezeichnet) kann der Neigungswinkel der Drehachse gegenüber der Arbeitsfläche sowie der Anpreßdruck der Messer gegen die Arbeitsfläche eingestellt werden. Der Winkel liegt zwischen 0 und 5°. Die Messer sind als Messerklingen aus elastischem Stahlblech ausgebildet und werden während ihres Kontaktes mit der Arbeitsfläche leicht durchgebogen.The individual shows:
Fig. 1
2 shows a side view of the exemplary embodiment of the device according to the invention described in detail below,
Fig. 2
a bottom view of the device,
Fig. 3
a partial view of a knife,
Fig. 4
a partial section running parallel to the tangential direction of the revolving circle through a knife and a carrier disk lying above it,
Fig. 5
a radially executed partial section through a knife and overlying carrier disk,
Fig. 6
another radial partial section through a bent knife and overlying carrier disk,
Fig. 7
a further advantageous embodiment of the present invention
Fig. 1 shows a side view of a Embodiment of the device according to the invention. A motor 2 with a reduction gear 3 is mounted thereon on a chassis 1. A cutting device consisting of a carrier disk 5 and knives 6 can be set into a rotary motion via a drive shaft 4 connected to a gear. With a device for height adjustment (not shown) arranged on the front and rear wheels, the angle of inclination of the axis of rotation relative to the work surface and the contact pressure of the knives against the work surface can be adjusted. The angle is between 0 and 5 °. The knives are designed as knife blades made of elastic sheet steel and are bent slightly during their contact with the work surface.

Bedient wird die Vorrichtung über einen am Ausleger 13 festgemachten Handgriff 14 und einen ebenfalls am Ausleger 13 festgemachten Betriebsschalter 15. Während des Betriebs laufen die Messer mit gleichmäßiger Drehzahl um die Achse (ca. 500 - 1000 U/min).The device is operated via a handle 14 attached to the arm 13 and an operating switch 15 also attached to the arm 13. During operation, the knives run at a constant speed around the axis (approx. 500-1000 rpm).

Fig. 2 zeigt eine Unteransicht des Ausführungsbeispiels. Die Messer 6 sind auf der Unterseite der Trägerscheibe 5 festgemacht. An den in Fahrtrichtung vorne liegenden linken und rechten Ecken des Fahrgestells sind Anschläge 16 vorgesehen, deren äußerste Verbindungslinie von den umlaufenden Messern gerade erreicht wird.Fig. 2 shows a bottom view of the embodiment. The knives 6 are fastened on the underside of the carrier disk 5. At the front left and right corners of the chassis in the direction of travel, stops 16 are provided, the outermost connecting line of which is just reached by the rotating knives.

Fig. 3 zeigt im Detail den vorderern Teil einer Messerklinge mit Schneidkante 7. Man erkennt, daß die Schneidkante 7 mit der Tangente an den Bewegungskreis einen Winkel einschließt, wodurch das in Bewegungsrichtung vorauseilende Ende der Schneidkante auf einem kleineren Radius umläuft als das bewegungsmäßig nacheilende Ende der Schneidkante. Ein derartiger Verlauf der Schneidkante bewirkt eine schneidende und zugleich ziehende Arbeitsbewegung des Messers an der Arbeitsfläche, was ein wichtiges erfindungsgemäßes Merkmal darstellt. Neben den dadurch erreichbaren besseren Arbeitsergebnissen wird zusätzlich die Lebensdauer der Messer erhöht, da derartig verlaufende Schneidkanten sich an der Bodenoberfläche ständig selbst nachschleifen.Fig. 3 shows in detail the front part of a knife blade with cutting edge 7. It can be seen that the cutting edge 7 includes an angle with the tangent to the circle of motion, whereby the end of the cutting edge leading in the direction of movement rotates on a smaller radius than that Moving end of the cutting edge. Such a course of the cutting edge causes a cutting and at the same time pulling working movement of the knife on the work surface, which is an important feature according to the invention. In addition to the better work results that can be achieved as a result, the service life of the knives is also increased, since such cutting edges continuously grind themselves on the surface of the floor.

Fig. 4 zeigt einen senkrecht zur Radialrichtung eines Messers verlaufenden Schnitt mit der darüberliegenden Trägerscheibe. Durch ein keilförmig ausgebildetes Trägerplattenpaar 17 kann eine Schrägstellung der Messer um eine radiale Achse aus der Ebene der Trägerscheibe erreicht werden. Dadurch wird sichergestellt, daß die Schneidkante in ihrer gesamten Länge in der Arbeitsfläche aufliegt, obwohl die Schneidkante einen Winkel zur Mittelachse der Messer bzw. zur Tangente an die Kreisbewegung einnimmt.FIG. 4 shows a section running perpendicular to the radial direction of a knife with the carrier disk lying above it. An oblique position of the knives about a radial axis from the plane of the carrier disk can be achieved by means of a pair of carrier plates 17 of wedge-shaped design. This ensures that the entire length of the cutting edge rests on the work surface, although the cutting edge is at an angle to the central axis of the knife or to the tangent to the circular movement.

Fig. 5 zeigt eine Möglichkeit wie die Messer aus der Ebene der Trägerscheibe heraus in Richtung Arbeitsfläche geneigt angebracht werden können. Die Trägerscheibe ist dabei über den Bereich einer äußeren Scheibe von außen nach innen verlaufend verjüngt ausgebildet. Mittels Schrauben 18 und Trägerplattenpaar 17 kann ein Messer auf der dadurch gegenüber der Trägerscheibenebene geneigten Montagefläche angebracht werden. Zusätzlich zu einem eventuell bereits durch Neigen der Drehachse erreichten Winkels zwischen der Messerklinge und der Arbeitsfläche kann dadurch ein noch größerer Auftreffwinkel erreicht werden. Zu erkennen ist außerdem eine vorteilhafte Ausführung der Trägerplatten 17, welche an ihrer Vorderkante abgerundet ausgebildet sind, um dadurch ein vorzeitiges Einkerben und Brechen der Messer durch betriebsbedingte Bewegungen und Vibrationen zu verhindern und damit eine hohe Lebensdauer der Messer zu garantieren.5 shows a possibility of how the knives can be attached inclined out of the plane of the carrier disk in the direction of the work surface. The carrier disk is designed to taper from the outside to the inside over the area of an outer disk. By means of screws 18 and pair of carrier plates 17, a knife can be attached to the mounting surface which is thereby inclined relative to the plane of the carrier disc. In addition to an angle between the knife blade and the work surface that may have already been reached by tilting the axis of rotation, an even larger angle of incidence can thereby be achieved. One can also see an advantageous embodiment of the carrier plates 17, which are rounded at their front edge, in order to prevent premature notching and breaking of the knives due to operational movements and vibrations and thus to guarantee a long service life of the knives.

Fig. 6 zeigt eine andere Möglichkeit der Befestigung der Messer an der Trägerscheibe. Die erforderliche Schrägstellung der Messerklingen 6 wird durch einen Knick innerhalb des freien nicht verschraubten Endes des Messers erreicht. Der Knick sollte etwa 15° aufweisen und die Knicklinie verläuft zweckmäßigerweise in der Draufsicht gesehen parallel zur Arbeitskante 7, was denselben Effekt hervorruft, der in der Beschreibung zu Fig. 4 erläutert wurde.Fig. 6 shows another way of attaching the knife to the carrier disc. The required inclination of the knife blades 6 is achieved by a kink within the free, unscrewed end of the knife. The kink should be approximately 15 ° and the kink line expediently runs parallel to the working edge 7 when viewed in plan view, which produces the same effect that was explained in the description of FIG. 4.

Fig. 7 zeigt eine weitere Ausführungsform der erfindungsgemäßen Vorrichtung. Bei besonders schwer zu entfernenden Rückständen von Bodenbelägen kann eine seitliche Versetzung der Maschine erfolgen. Dieser Versetzung kann durch eine zweite gegensinnig drehende Schneidvorrichtung begegnet werden. In Fahrtrichtung nebeneinander und um parallele Achsen drehend sind zwei Schneidvorrichtungen vorhanden. Die Drehrichtungen sind dabei so gewählt, daß eine Beförderung der abgelösten Reste nach außen hin erfolgen kann. Die Messer beider Schneidvorrichtungen greifen ineinander, so daß die Arbeitsbahn der beiden Schneidvorrichtungen nebeneinander zu liegen kommen. Anzahl und Größe der Messe sind so gewählt, daß ein reibungsloses Ineinandergreifen gewährleistet ist.7 shows a further embodiment of the device according to the invention. If floor coverings are particularly difficult to remove, the machine can be moved laterally. This displacement can be countered by a second counter-rotating cutting device. Two cutting devices are provided next to each other in the direction of travel and rotating around parallel axes. The directions of rotation are chosen so that the detached residues can be transported to the outside. The knives of both cutters interlock so that the working path of the two cutters come to lie side by side. The number and size of the trade fair have been chosen so that a smooth meshing is guaranteed.

Claims (12)

  1. An apparatus for removing floorings, having a chassis (1) movable on the flooring, a motor (2) mounted on the chassis and at least one cutting device (6) which is driven by the motor and which is operative on a working surface sloping into the surface of the flooring, characterised in that the cutting device has at least one blade (6) rotating about a substantially vertical axis, and in that the blade is so designed and arranged that its cutting edge (7) lies on said working surface and assumes an angle of less than 30° relative to the tangent of the circular motion, the leading end of the cutting edge with respect to movement lying on a smaller radius than the trailing end in respect of movement.
  2. An apparatus for removing floorings according to Claim 1, characterised in that the angle is between 15° and 2°.
  3. An apparatus for removing floorings according to Claim 1 or Claim 2, characterised in that the blade is secured at a distance from the working surface and descends extending outwards towards the working surface.
  4. An apparatus for removing floorings according to Claim 1, 2 or 3, characterised in that at least the radially outerlying portion of the blade is in the form of a knife blade of flexible steel sheet, and in that the knife blade assumes an acute angle of preferably between 10° and 30° relative to the working surface.
  5. An apparatus for removing floorings according to at least one of the preceding Claims, characterised in that the blade is rotated about its radial axis in such a way that, despite its angle to the tangent of the circular motion, the cutting edge lies along its entire length on the working surface.
  6. An apparatus for removing floorings according to at least one of the preceding Claims, characterised in that, at its free end, the blade has a kink of preferably 10° to 30° in the direction of the working surface, this kink preferably extending parallel to the working edge.
  7. An apparatus for removing floorings according to at least one of the preceding Claims, characterised in that the axis is inclined by an angle of between 0° and 5° in operating direction.
  8. An apparatus for removing floorings according to at least one of the preceding Claims, characterised in that the tip of the blade coming into contact with the working surface has a wedge-shaped profile which is formed so that one side of the wedge lies on the working surface and the opposite side of the wedge lies in a plane with the surface of the rest of the blade adjoined thereto.
  9. An apparatus for removing floorings according to at least one of the preceding Claims, characterised in that two cutting devices are provided which are rotatable about axes situated parallel to one another and side by side in operating direction, said cutting devices being driven by the same motor but in opposite directions.
  10. An apparatus for removing floorings according to at least one of the preceding Claims, characterised in that a means for accommodating a weight is provided on the chassis.
  11. An apparatus for removing floorings according to at least one of the preceding Claims, characterised in that, in the left-hand and right-hand corners situated at the front in the direction of movementm, the chassis has a respective stop member, the connecting line of which stop members is exactly reached by the rotating blades.
  12. An apparatus for removing floorings according to at least one of the preceding Claims, characterised in that the chassis is driven by the motor, in that the axis of rotation of the cutting device is aligned perpendicularly to the working surface, and in that the rotatable blades are rigidly formed.
EP91117388A 1990-10-12 1991-10-11 Floor surfacing device Expired - Lifetime EP0480464B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4032501A DE4032501A1 (en) 1990-10-12 1990-10-12 DEVICE FOR REMOVING FLOORS
DE4032501 1990-10-12

Publications (2)

Publication Number Publication Date
EP0480464A1 EP0480464A1 (en) 1992-04-15
EP0480464B1 true EP0480464B1 (en) 1995-01-25

Family

ID=6416199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91117388A Expired - Lifetime EP0480464B1 (en) 1990-10-12 1991-10-11 Floor surfacing device

Country Status (3)

Country Link
EP (1) EP0480464B1 (en)
AT (1) ATE117521T1 (en)
DE (2) DE4032501A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29905936U1 (en) 1999-04-01 1999-07-01 Geibel, jun., Gregor, 77933 Lahr Cutting device, in particular for cutting doner kebab

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4377412A (en) * 1980-09-16 1983-03-22 Viehe John S Improved rotary scraper having flexible fingers
DE3523903A1 (en) * 1985-07-04 1987-01-08 Karl Hettich Floor-polishing machine
DE3527595A1 (en) * 1985-08-01 1987-02-12 Gobbers Maschinenbau Geb Device for removing old floor coverings
DE3715620A1 (en) * 1986-07-02 1988-01-14 Witte Michael Dipl Oec Device for removing floor coverings
DE3719721C3 (en) * 1987-06-12 1996-10-17 Gaemmerler Hagen Cutting knives for rotary cutting machines for paper
CH670415A5 (en) * 1988-09-20 1989-06-15 Hans Meier Abrasive disc for wood finishing - has radial helical abrasive ribs with resilient tubes attached, enclosed by stationary dust extraction ring

Also Published As

Publication number Publication date
DE4032501A1 (en) 1992-04-16
ATE117521T1 (en) 1995-02-15
EP0480464A1 (en) 1992-04-15
DE59104390D1 (en) 1995-03-09

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