EP1278448A1 - Device for carrying out works on a surface - Google Patents

Device for carrying out works on a surface

Info

Publication number
EP1278448A1
EP1278448A1 EP01931545A EP01931545A EP1278448A1 EP 1278448 A1 EP1278448 A1 EP 1278448A1 EP 01931545 A EP01931545 A EP 01931545A EP 01931545 A EP01931545 A EP 01931545A EP 1278448 A1 EP1278448 A1 EP 1278448A1
Authority
EP
European Patent Office
Prior art keywords
support
working
negative pressure
working device
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01931545A
Other languages
German (de)
French (fr)
Other versions
EP1278448B1 (en
Inventor
Jürgen KONRAD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1278448A1 publication Critical patent/EP1278448A1/en
Application granted granted Critical
Publication of EP1278448B1 publication Critical patent/EP1278448B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4052—Movement of the tools or the like perpendicular to the cleaning surface
    • A47L11/4058—Movement of the tools or the like perpendicular to the cleaning surface for adjusting the height of the tool
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L1/00—Cleaning windows
    • A47L1/02—Power-driven machines or devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/38—Machines, specially adapted for cleaning walls, ceilings, roofs, or the like

Definitions

  • the invention relates to a device for performing work on a surface, with a device for generating a vacuum between the device and the surface, at least one support for supporting against the surface and a working device for processing the surface.
  • Such a device is known in particular from US Pat. No. 4,971,591, with the working device of which windows can be washed or surfaces can be painted. In most cases, the surface must be touched generally for processing, with special demands being placed on the contact pressure of the working device on the surface, as can be the case especially in cleaning work.
  • the known generic devices are designed for this purpose as vehicles that can also move alone over the surface and to which the working device is attached. These known devices have in particular the disadvantage that a further device is required to press the working device onto the surface, which represents a technical and financial outlay. This is now increased again if the pressure force should have a certain value.
  • the present invention has for its object to provide a device of the type mentioned, in which the working device can be pressed against the surface to be worked with a predetermined effort with little effort.
  • the device is also supported by the working device against the surface and the working device and the at least one support form a three-point support. In this way, mechanical overdetermination of the support of the device on the surface is avoided the working device pressed against the surface is included in the support, so that a special device for pressing the working device is unnecessary.
  • a defined pressing force of the working device against the surface can be generated particularly advantageously by the device for generating a negative pressure between the device and the surface, which is present anyway.
  • the distribution of the pressing force of the device caused by the negative pressure onto the surface is distributed over the at least one support and the working device in relation to one another in accordance with the geometric arrangement. Given the distribution of the pressing force, the pressing force of the working device can thus be changed particularly simply by controlling the device for generating the negative pressure.
  • This device can be, for example, a blower, the speed and suction power of which can be changed.
  • two supports are provided which essentially form an equilateral triangle with the working device, the base of which extends between the two supports.
  • the working device need to be exclusively point-shaped, on the contrary, it can have an elongated surface in order to be able to process a larger surface at the same time.
  • the center of the surface pressure corresponds to the point of contact of the working device.
  • a floating or articulated mounting can be provided for the working device, for example in the form of a rubber bearing or a gimbal, which cannot transmit any torques. This can ensure that the working device can only exert a supporting force acting perpendicular to the surface on the device and no tilting moment which could influence the load distribution between the two supports.
  • the triangular arrangement of the support points ensures a high stability of the device on the surface and avoids mechanical overdetermination with regard to the support.
  • the vacuum force is distributed over the supports or the working device in the inverse ratio of the distance of the point of application of the negative pressure force to the triangular base between the supports or to the support point of the working device.
  • the simple application of the lever law makes it possible to determine the pressing force of the working device caused by a certain negative pressure force.
  • an elongated shape of the working device can be selected, the extension of which lies next to the support point of the one support.
  • the mechanical overdetermination of the support is avoided by a combined distance and point support, it being possible to assign one of the one support and two of the support range of the working device, in particular the two ends of the working device, from the three points of the three-point support.
  • the support triangle is formed by the support and the outermost points of the working device with which it rests on the surface.
  • the device can have a drive device, which is advantageously formed by a support. In this way, a separate drive device, which must necessarily have contact with the surface and could lead to mechanical overdetermination, is not required.
  • the drive device can be formed by a driven wheel with frictional engagement with the surface.
  • two mutually spaced drive devices can be provided, which are driven at different speeds and / or drive directions.
  • the drive direction of the drive device can also be changeable. In this way, the direction of movement of the device on the surface can be changed even if only one drive device is provided. With two drive devices that can be changed in their drive direction, movement of the device on the surface in different orientations is also possible.
  • a device for detecting the negative pressure can be provided between the device and the surface.
  • the pressure force of the device against the surface can be determined on the basis of the measured negative pressure and the area dimension acted upon by the negative pressure. From this force, in turn, Before applying the lever laws, taking into account the arrangement of the supports and the working device to one another and in particular to the point of application of the negative pressure, the contact pressure of the working device is determined and monitored.
  • the device according to the invention there is a fixed relationship between the attractive force of the device on the surface, which in turn depends on the negative pressure generated, and the pressing force of the working device on the surface.
  • the contact pressure of the working device on the surface can be regulated particularly simply by changing the negative pressure generated, in that the device for generating the negative pressure is controlled with different outputs.
  • both the negative pressure between the device and the surface and also the contact pressure of the working device against the surface can be used as the control variable.
  • the device can have an inclination sensor. This makes it possible to determine whether the device is in a vertical or horizontal position or hangs upside down on a surface.
  • the position of the device influences the relationship between the negative pressure and the pressing force of the device against the surface, since the weight force can reduce the attractive force depending on the position.
  • the influence of the position of the device on the pressing force can be compensated, as is particularly advantageous when used on surfaces with different inclinations.
  • Fig. 1 is a schematic side sectional view of a first
  • Fig. 2 is a bottom view of the first embodiment
  • Fig. 3 is a bottom view of a second embodiment.
  • the device 2 shown in a lateral schematic sectional view in FIG. 1 is in its working position on a surface 1 to be processed.
  • the device 2 has a housing 3 in which a device 4 for generating a negative pressure and two support or drive rollers 8 on.
  • a cleaning device 6 is attached to the outside of the housing 3 as a working device by means of two struts 7.
  • the device 2 rests on the surface 1 on the two drive rollers 8 and on the cleaning device 6.
  • the housing 3 of the device 2 has the shape of a shell, the edges of which are at a short distance from the surface 1.
  • the housing 3 thus forms, together with the surface 1, a substantially closed space in which a vacuum can be generated by the device 4, which ensures that the device 2 is attracted to the surface 1. In this way, the device 2 can also move vertically or upside down on the surface 1, as is required, for example, when cleaning vertical or horizontal glass surfaces.
  • a handle 5 for handling the device 2 is arranged on the top of the housing 3.
  • the cleaning device 6 has an elongated narrow shape and extends along an entire side of the essentially rectangular device 2 in order to be able to simultaneously clean the largest possible portions of the surface 1.
  • the two drive wheels 8 are each arranged on the side of the device 2 opposite the cleaning device 6, the two drive wheels 8 being as far apart as possible. Both drive wheels 8 are each driven by a drive motor 9 and are provided with a coating which creates a frictional connection between the drive wheels 8 and the surface 1.
  • the fan 4 If, during operation, the fan 4 generates a negative pressure within the housing 3, the device 2 and the surface 1 are pressed together, this force acting essentially at the center of gravity of the surface spanned by the edge of the housing 3.
  • This attraction force is now distributed according to a fixed relationship between the two drive wheels 8 and the cleaning device 6, which depends on their spatial arrangement with respect to one another and with respect to the point of force application. Since the device 2 is based on three conditions, the two drive wheels 8 and the cleaning device 6, the contact pressure of the cleaning device 6 is directly related to the attraction of the device 2 to the surface 1.
  • a suitable selection or control of the blower 4 can provide a measure be set for the negative pressure, that too leads to the desired contact pressure of the cleaning device 6 on the surface 1.
  • a vacuum sensor can be provided within the housing 3, with which a suitable control circuit can regulate the vacuum or the contact pressure of the cleaning device 6 with regard to an optimal target value.
  • the two drive motors 9 move the device 2 on the surface 1, the two drive wheels 8 being driven at a different speed and / or direction of rotation for a change in the direction of movement.
  • FIG. 3 shows a second embodiment of the device 2 according to the invention with only one drive wheel 8.
  • the drive wheel 8 is arranged approximately centrally on the side of the housing 3 opposite the cleaning device 6 and can be driven by a drive motor 9.
  • a servomotor 10 is provided with which the drive wheel 8 can be rotated together with the drive motor 9 in order to be able to change the drive direction of the drive wheel 8 with respect to the housing 3. In this way it is possible to change the direction of movement of the device 2 on the surface 1 even with only one drive wheel 8.
  • the device 2 rests on the surface 1 with the elongated cleaning device 6 and only one drive wheel 8.
  • the support of the device 2 on the surface 1 is not mechanically overdetermined and the attraction force of the device 2 to the surface 1 is in a fixed ratio to the contact pressure of the cleaning device 6 against the surface 1, so that by setting the negative pressure between the device 2 and the surface 1, the contact pressure of the cleaning device 6 against the surface 1 can be set in a targeted manner.
  • the two embodiments are able to regulate the contact pressure of the cleaning device 6, the vacuum being measured as well as the contact pressure being measured directly and the output of the blower 4 being used as the manipulated variable.

Landscapes

  • Cleaning In General (AREA)
  • Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Coating Apparatus (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Chemically Coating (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

A vacuum-generator (4) produces the vacuum between the machining appliance (2) and the surface being machined (1). At least one support (8) is supported against the surface . The machining appliance is supported against the surface by means of a working-appliance (6) which together with the at least one support, forms a three-point base.

Description

Vorrichtung zur Durchführung von Arbeiten an einer Fläche Device for performing work on a surface
Die Erfindung betrifft eine Vorrichtung zum Durchführen von Arbeiten an einer Fläche, mit einer Einrichtung zum Erzeugen eines Unterdrucks zwischen der Vorrichtung und der Fläche, wenigstens einer Auflage zum Abstützen gegen die Fläche und einer Arbeitsvorrichtung zum Bearbeiten der Fläche.The invention relates to a device for performing work on a surface, with a device for generating a vacuum between the device and the surface, at least one support for supporting against the surface and a working device for processing the surface.
Insbesondere durch die US 4,971 ,591 ist eine derartige Vorrichtung bekannt, mit deren Arbeitsvorrichtung Fenster gewaschen oder Oberflächen lackiert werden können. In den meisten Fällen muß die Fläche allgemein zum Bearbeiten berührt werden, wobei meistens besondere Anforderungen an den Anpreßdruck der Arbeitsvorrichtung an die Fläche gestellt werden, wie es insbesondere bei Reinigungsarbeiten der Fall sein kann. Die bekannten gattungsgemäßen Vorrichtungen sind dazu als Fahrzeuge ausgestaltet, die sich auch alleine über die Fläche bewegen können und an denen die Arbeitsvorrichtung befestigt wird. Diese bekannten Vorrichtungen weisen insbesondere den Nachteil auf, daß zum Andrücken der Arbeitsvorrichtung an die Fläche eine weitere Einrichtung erforderlich ist, die einen technischen und finanziellen Aufwand darstellt. Dieser wird nun nochmals erhöht, wenn die Andrückkraft einen bestimmten Wert besitzen soll.Such a device is known in particular from US Pat. No. 4,971,591, with the working device of which windows can be washed or surfaces can be painted. In most cases, the surface must be touched generally for processing, with special demands being placed on the contact pressure of the working device on the surface, as can be the case especially in cleaning work. The known generic devices are designed for this purpose as vehicles that can also move alone over the surface and to which the working device is attached. These known devices have in particular the disadvantage that a further device is required to press the working device onto the surface, which represents a technical and financial outlay. This is now increased again if the pressure force should have a certain value.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art zu schaffen, bei der mit geringem Aufwand die Arbeitsvorrichtung mit einer vorbestimmten Kraft an die zu bearbeitende Fläche gedrückt werden kann.The present invention has for its object to provide a device of the type mentioned, in which the working device can be pressed against the surface to be worked with a predetermined effort with little effort.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß sich die Vorrichtung auch mittels der Arbeitsvorrichtung gegen die Fläche abstützt und die Arbeitsvorrichtung und die wenigstens eine Auflage eine Dreipunktauflage bilden. Auf diese Weise wird eine mechanische Überbestimmung der Auflage der Vorrichtung auf der Fläche vermieden, wobei die an die Fläche angedrückte Arbeitsvorrichtung in die Auflage einbezogen ist, so daß eine besondere Vorrichtung zum Andrücken der Arbeitsvorrichtung entbehrlich ist. Eine definierte Andrückkraft der Arbeitsvorrichtung an die Fläche kann besonders vorteilhaft durch die Einrichtung zum Erzeugen eines Unterdrucks zwischen der Vorrichtung und der Fläche erzeugt werden, die ohnehin vorhanden ist. Die Verteilung der von dem Unterdruck verursachten Andrückkraft der Vorrichtung an die Fläche verteilt sich auf die wenigstens eine Auflage und die Arbeitsvorrichtung entsprechend der geometrische Anordnung zueinander. Bei gegebener Verteilung der Andrückkraft kann somit die Andrückkraft der Arbeitsvorrichtung besonders einfach durch Steuerung der Einrichtung zum Erzeugen des Unterdrucks verändert werden. Diese Einrichtung kann beispielsweise ein Gebläse sein, dessen Drehzahl und Saugleistung verändert werden kann.This object is achieved in that the device is also supported by the working device against the surface and the working device and the at least one support form a three-point support. In this way, mechanical overdetermination of the support of the device on the surface is avoided the working device pressed against the surface is included in the support, so that a special device for pressing the working device is unnecessary. A defined pressing force of the working device against the surface can be generated particularly advantageously by the device for generating a negative pressure between the device and the surface, which is present anyway. The distribution of the pressing force of the device caused by the negative pressure onto the surface is distributed over the at least one support and the working device in relation to one another in accordance with the geometric arrangement. Given the distribution of the pressing force, the pressing force of the working device can thus be changed particularly simply by controlling the device for generating the negative pressure. This device can be, for example, a blower, the speed and suction power of which can be changed.
In einer vorteilhaften Ausführungsform sind zwei Auflagen vorgesehen, die mit der Arbeitsvorrichtung im wesentlichen ein gleichschwenkliges Dreieck bilden, dessen Basis sich zwischen den beiden Auflagen erstreckt. Die Arbeitsvorrichtung braucht jedoch in keinem Fall ausschließlich punktförmig zu sein, sondern kann im Gegenteil eine längliche Fläche aufweisen, um eine größere Fläche gleichzeitig bearbeiten zu können. In diesem Fall entspricht der Flächendruckmittelpunkt dem Auflagepunkt der Arbeitsvorrichtung. Wenn die Arbeitsvorrichtung flächig ausgeführt ist, kann in diesem Fall eine schwimmende beziehungsweise gelenkige Lagerung für die Arbeitsvorrichtung vorgesehen sein, beispielsweise in Form eines Gummilagers oder einer kardanischen Aufhängung, die keine Drehmomente übertragen können. Dadurch kann gewährleistet werden, dass die Arbeitsvorrichtung nur eine senkrecht zur Fläche wirkende Stützkraft auf die Vorrichtung ausüben kann und kein Kippmoment, das die Lastverteilung zwischen den zwei Auflagen beeinflussen könnte.In an advantageous embodiment, two supports are provided which essentially form an equilateral triangle with the working device, the base of which extends between the two supports. In no case, however, does the working device need to be exclusively point-shaped, on the contrary, it can have an elongated surface in order to be able to process a larger surface at the same time. In this case, the center of the surface pressure corresponds to the point of contact of the working device. If the working device is flat, in this case a floating or articulated mounting can be provided for the working device, for example in the form of a rubber bearing or a gimbal, which cannot transmit any torques. This can ensure that the working device can only exert a supporting force acting perpendicular to the surface on the device and no tilting moment which could influence the load distribution between the two supports.
Die dreiecksförmige Anordnung der Auflagepunkte gewährleistet eine hohe Stabilität der Vorrichtung an der Fläche und vermeidet eine mechanische Überbestimmung hinsichtlich der Auflage. Die Unterdruckkraft verteilt sich auf die Auflagen bzw. die Arbeitsvorrichtung im umgekehrten Verhältnis des Abstandes des Angriffspunkts der Unterdruckkraft zu der Dreiecksbasis zwischen den Auflagen bzw. zu dem Auflagepunkt der Arbeitsvorrichtung. Durch die einfache Anwendung des Hebelgesetzes ist es somit möglich, die von einer bestimmten Unterdruckkraft hervorgerufene Andrückkraft der Arbeitsvorrichtung zu bestimmen. Alternativ zu der vorherigen Ausführungsform ist es ebenso möglich, die Arbeitsvorrichtung flächig auszuführen und nur eine Auflage vorzusehen.The triangular arrangement of the support points ensures a high stability of the device on the surface and avoids mechanical overdetermination with regard to the support. The vacuum force is distributed over the supports or the working device in the inverse ratio of the distance of the point of application of the negative pressure force to the triangular base between the supports or to the support point of the working device. The simple application of the lever law makes it possible to determine the pressing force of the working device caused by a certain negative pressure force. As an alternative to the previous embodiment, it is also possible to make the working device flat and to provide only one support.
Insbesondere kann dabei eine längliche Form der Arbeitsvorrichtung gewählt werden, deren Verlängerung neben dem Auflagepunkt der einen Auflage liegt. In dieser gleichwirkenden Ausführungsform wird die mechanische Überbestimmung der Auflage durch eine kombinierte Strecken- und Punktauflage vermieden, wobei von den drei Punkten der Dreipunktauflage einer der einen Auflage und zwei der Auflagestrecke der Arbeitsvorrichtung zugeordnet werden können, insbesondere den beiden Enden der Arbeitsvorrichtung. Das Auflagedreieck wird in diesem Fall von der Auflage und den äußersten Punkten der Arbeitsvorrichtung gebildet, mit denen sie auf der Fläche aufliegt.In particular, an elongated shape of the working device can be selected, the extension of which lies next to the support point of the one support. In this embodiment having the same effect, the mechanical overdetermination of the support is avoided by a combined distance and point support, it being possible to assign one of the one support and two of the support range of the working device, in particular the two ends of the working device, from the three points of the three-point support. In this case, the support triangle is formed by the support and the outermost points of the working device with which it rests on the surface.
Zum Bearbeiten der Fläche an verschiedenen Stellen kann die Vorrichtung eine Antriebseinrichtung aufweisen, die vorteilhafterweise von einer Auflage gebildet wird. Eine separate Antriebseinrichtung, die notwendigerweise Kontakt zur Fläche haben muß und zu einer mechanischen Überbestimmung führen könnte, ist auf diese Weise nicht erforderlich. Die Antriebseinrichtung kann in einer vorteilhaft einfachen Ausführung von einem angetriebenen Rad mit Reibschluß zur Fläche gebildet werden. Zur Veränderung der Bewegungsrichtung der Vorrichtung auf der Fläche können zwei zueinander beabstandete Antriebseinrichtungen vorgesehen werden, die mit unterschiedlichen Geschwindigkeiten und/oder Antriebsrichtungen angetrieben werden.To process the surface at different points, the device can have a drive device, which is advantageously formed by a support. In this way, a separate drive device, which must necessarily have contact with the surface and could lead to mechanical overdetermination, is not required. In an advantageously simple embodiment, the drive device can be formed by a driven wheel with frictional engagement with the surface. To change the direction of movement of the device on the surface, two mutually spaced drive devices can be provided, which are driven at different speeds and / or drive directions.
Dessen ungeachtet kann jedoch auch die Antriebsrichtung der Antriebseinrichtung veränderbar sein. Auf diese Weise kann die Bewegungsrichtung der Vorrichtung auf der Fläche auch bei nur einer vorgesehenen Antriebseinrichtung verändert werden. Bei zwei in ihrer Antriebsrichtung veränderbaren Antriebseinrichtungen wird zusätzlich auch eine Bewegung der Vorrichtung auf der Fläche in verschiedenen Ausrichtungen möglich.Nevertheless, the drive direction of the drive device can also be changeable. In this way, the direction of movement of the device on the surface can be changed even if only one drive device is provided. With two drive devices that can be changed in their drive direction, movement of the device on the surface in different orientations is also possible.
Um die Kraft bestimmen zu können, mit der die Vorrichtung aufgrund des Unterdrucks an die Fläche gedrückt wird, kann eine Einrichtung zum Erfassen des Unterdrucks zwischen der Vorrichtung und der Fläche vorgesehen sein. Aufgrund des gemessenen Unterdrucks und dem von dem Unterdruck beaufschlagten Flächenmaß kann die Andrückkraft der Vorrichtung an die Fläche bestimmt werden. Aus dieser Kraft wiederum kann durch einfa- ehe Anwendung der Hebelgesetze unter Berücksichtigung der Anordnung der Auflagen und der Arbeitsvorrichtung zueinander und insbesondere zum Angriffspunkt der Unterdruckkraft der Anpreßdruck der Arbeitsvorrichtung bestimmt und überwacht werden. Bei der erfindungsgemäßen Vorrichtung besteht eine feste Beziehung zwischen der Anziehungskraft der Vorrichtung an die Fläche, die wiederum vom erzeugten Unterdruck abhängt, und der Andrückkraft der Arbeitsvorrichtung an die Fläche. Aus diesem Grund kann die Anpreßkraft der Arbeitsvorrichtung an die Fläche besonders einfach durch Veränderung des erzeugten Unterdrucks geregelt werden, indem die Einrichtung zum Erzeugen des Unterdrucks mit unterschiedlicher Leistung angesteuert wird. Als Regelungsgröße kann bei Verwendung eines geeigneten Meßaufnehmers sowohl der Unterdruck zwischen der Vorrichtung und der Fläche als auch direkt die Anpreßkraft der Arbeitsvorrichtung gegen die Fläche verwendet werden.In order to be able to determine the force with which the device is pressed against the surface due to the negative pressure, a device for detecting the negative pressure can be provided between the device and the surface. The pressure force of the device against the surface can be determined on the basis of the measured negative pressure and the area dimension acted upon by the negative pressure. From this force, in turn, Before applying the lever laws, taking into account the arrangement of the supports and the working device to one another and in particular to the point of application of the negative pressure, the contact pressure of the working device is determined and monitored. In the device according to the invention, there is a fixed relationship between the attractive force of the device on the surface, which in turn depends on the negative pressure generated, and the pressing force of the working device on the surface. For this reason, the contact pressure of the working device on the surface can be regulated particularly simply by changing the negative pressure generated, in that the device for generating the negative pressure is controlled with different outputs. When using a suitable measuring sensor, both the negative pressure between the device and the surface and also the contact pressure of the working device against the surface can be used as the control variable.
Zusätzlich kann die Vorrichtung einen Neigungssensor aufweisen. Damit kann festgestellt werden, ob sich die Vorrichtung in senkrechter oder waag rechter Stellung befindet oder kopfüber an einer Fläche hängt. Die Stellung der Vorrichtung beeinflusst die Beziehung zwischen dem Unterdruck und der Andrückkraft der Vorrichtung an die Fläche, da die Gewichtskraft abhängig von der Stellung die Anziehungskraft mindern kann. Durch Berücksichtigung der vom Neigungssensor erfassten Stellung kann der Einfluss der Stellung der Vorrichtung auf die Andrückkraft kompensiert werden, wie es insbesondere beim Einsatz auf Flächen mit unterschiedlicher Neigung vorteilhaft ist.In addition, the device can have an inclination sensor. This makes it possible to determine whether the device is in a vertical or horizontal position or hangs upside down on a surface. The position of the device influences the relationship between the negative pressure and the pressing force of the device against the surface, since the weight force can reduce the attractive force depending on the position. By taking into account the position detected by the inclination sensor, the influence of the position of the device on the pressing force can be compensated, as is particularly advantageous when used on surfaces with different inclinations.
Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus der folgenden Beschreibung zweier Ausführungsbeispiele einer erfindungsgemäßen Vorrichtung unter Bezugnahme auf die Zeichnungen. Darin zeigen:Further details, features and advantages of the invention result from the following description of two exemplary embodiments of a device according to the invention with reference to the drawings. In it show:
Fig. 1 eine schematische seitliche Schnittansicht eines erstenFig. 1 is a schematic side sectional view of a first
Ausführungsbeispiels,Embodiment,
Fig. 2 eine Ansicht von unten des ersten Ausführungsbeispiels undFig. 2 is a bottom view of the first embodiment and
Fig. 3 eine Ansicht von unten eines zweiten Ausführungsbeispiels. Die in Fig. 1 in einer seitlichen schematischen Schnittansicht dargestellte Vorrichtung 2 befindet sich in ihrer Arbeitsposition auf einer zu bearbeitenden Fläche 1. Die Vorrichtung 2 weist ein Gehäuse 3 auf, in dem eine Einrichtung 4 zum Erzeugen eines Unterdrucks und zwei Auflage- bzw. Antriebsrollen 8 auf. Außen am Gehäuse 3 ist als Arbeitsvorrichtung eine Reinigungseinrichtung 6 mittels zweier Streben 7 befestigt. Die Vorrichtung 2 ruht auf der Fläche 1 auf den zwei Antriebsrollen 8 sowie auf der Reinigungseinrichtung 6. Das Gehäuse 3 der Vorrichtung 2 besitzt die Form einer Schale, deren Ränder einen geringen Abstand zur Fläche 1 besitzen. Das Gehäuse 3 bildet somit zusammen mit der Fläche 1 einen im wesentlichen geschlossenen Raum, in dem von der Einrichtung 4 ein Unterdruck erzeugt werden kann, der für eine Anziehung der Vorrichtung 2 an die Fläche 1 sorgt. Auf diese Weise kann sich die Vorrichtung 2 an der Fläche 1 auch senkrecht oder kopfüber bewegen, wie es beispielsweise bei der Reinigung von senkrecht oder waagrecht stehenden Glasflächen erforderlich ist. Oben am Gehäuse 3 ist ein Griff 5 zur Handhabung der Vorrichtung 2 angeordnet.Fig. 3 is a bottom view of a second embodiment. The device 2 shown in a lateral schematic sectional view in FIG. 1 is in its working position on a surface 1 to be processed. The device 2 has a housing 3 in which a device 4 for generating a negative pressure and two support or drive rollers 8 on. A cleaning device 6 is attached to the outside of the housing 3 as a working device by means of two struts 7. The device 2 rests on the surface 1 on the two drive rollers 8 and on the cleaning device 6. The housing 3 of the device 2 has the shape of a shell, the edges of which are at a short distance from the surface 1. The housing 3 thus forms, together with the surface 1, a substantially closed space in which a vacuum can be generated by the device 4, which ensures that the device 2 is attracted to the surface 1. In this way, the device 2 can also move vertically or upside down on the surface 1, as is required, for example, when cleaning vertical or horizontal glass surfaces. A handle 5 for handling the device 2 is arranged on the top of the housing 3.
In Fig. 2 ist die erfindungsgemäße Vorrichtung gemäß des ersten Ausführungsbeispiels von unten dargestellt. Die Reinigungseinrichtung 6 besitzt eine längliche schmale Form und erstreckt sich entlang einer gesamten Seite der im wesentlichen rechteckförmigen Vorrichtung 2, um möglichst große Abschnitte der Fläche 1 gleichzeitig reinigen zu können. Die beiden Antriebsräder 8 sind jeweils auf der der Reinigungseinrichtung 6 gegenüberliegenden Seite der Vorrichtung 2 angeordnet, wobei die beiden Antriebsräder 8 einen möglichst großen Abstand zueinander besitzen. Beide Antriebsräder 8 werden jeweils von einem Antriebsmotor 9 angetrieben und sind mit einer Beschichtung versehen, die einen Reibschluß zwischen den Antriebsrädern 8 und der Fläche 1 herstellt.2 shows the device according to the invention in accordance with the first exemplary embodiment from below. The cleaning device 6 has an elongated narrow shape and extends along an entire side of the essentially rectangular device 2 in order to be able to simultaneously clean the largest possible portions of the surface 1. The two drive wheels 8 are each arranged on the side of the device 2 opposite the cleaning device 6, the two drive wheels 8 being as far apart as possible. Both drive wheels 8 are each driven by a drive motor 9 and are provided with a coating which creates a frictional connection between the drive wheels 8 and the surface 1.
Wenn im Betrieb von dem Gebläse 4 ein Unterdruck innerhalb des Gehäuses 3 erzeugt wird, wird die Vorrichtung 2 und die Fläche 1 zusammengepreßt, wobei diese Kraft im wesentlichen im Flächenschwerpunkt der vom Rand des Gehäuses 3 aufgespannten Fläche angreift. Diese Anziehungskraft verteilt sich nun gemäß einer festen Beziehung auf die beiden Antriebsräder 8 und die Reinigungseinrichtung 6, die von deren räumlichen Anordnung zueinander und in Bezug auf den Krafteinleitungspunkt abhängt. Da die Vorrichtung 2 auf drei Auflagen beruht, den beiden Antriebsrädern 8 und der Reinigungseinrichtung 6, steht die Anpreßkraft der Reinigungseinrichtung 6 im direkten Verhältnis zur Anziehungskraft der Vorrichtung 2 an die Fläche 1. Durch geeignete Auswahl oder An- steuerung des Gebläses 4 kann ein Maß für den Unterdruck eingestellt werden, das zu dem gewünschten Anpreßdruck der Reinigungsvorrichtung 6 an die Fläche 1 führt. Zusätzlich kann ein Unterdruckaufnehmer innerhalb des Gehäuses 3 vorgesehen sein, mit dem eine geeignete Regelschaltung den Unterdruck bzw. die Anpreßkraft der Reinigungsvorrichtung 6 hinsichtlich eines optimalen Sollwerts regeln kann.If, during operation, the fan 4 generates a negative pressure within the housing 3, the device 2 and the surface 1 are pressed together, this force acting essentially at the center of gravity of the surface spanned by the edge of the housing 3. This attraction force is now distributed according to a fixed relationship between the two drive wheels 8 and the cleaning device 6, which depends on their spatial arrangement with respect to one another and with respect to the point of force application. Since the device 2 is based on three conditions, the two drive wheels 8 and the cleaning device 6, the contact pressure of the cleaning device 6 is directly related to the attraction of the device 2 to the surface 1. A suitable selection or control of the blower 4 can provide a measure be set for the negative pressure, that too leads to the desired contact pressure of the cleaning device 6 on the surface 1. In addition, a vacuum sensor can be provided within the housing 3, with which a suitable control circuit can regulate the vacuum or the contact pressure of the cleaning device 6 with regard to an optimal target value.
Die beiden Antriebsmotoren 9 sorgen für eine Bewegung der Vorrichtung 2 auf der Fläche 1 , wobei für eine Änderung der Bewegungsrichtung die beiden Antriebsräder 8 mit einer unterschiedlichen Geschwindigkeit und/oder Drehrichtung angetrieben werden.The two drive motors 9 move the device 2 on the surface 1, the two drive wheels 8 being driven at a different speed and / or direction of rotation for a change in the direction of movement.
In Fig. 3 ist eine zweite Ausführungsform der erfindungsgemäßen Vorrichtung 2 mit nur einem Antriebsrad 8 dargestellt. Das Antriebsrad 8 ist ungefähr mittig auf der der Reinigungsvorrichtung 6 gegenüberliegenden Seite des Gehäuses 3 angeordnet und kann von einem Antriebsmotor 9 angetrieben werden. Zusätzlich ist ein Stellmotor 10 vorgesehen, mit dem das Antriebsrad 8 zusammen mit dem Antriebsmotor 9 gedreht werden kann, um die Antriebsrichtung des Antriebsrads 8 in Bezug auf das Gehäuse 3 verändern zu können. Auf diese Weise ist es möglich, die Bewegungsrichtung der Vorrichtung 2 auf der Fläche 1 auch mit nur einem Antriebsrad 8 zu verändern.FIG. 3 shows a second embodiment of the device 2 according to the invention with only one drive wheel 8. The drive wheel 8 is arranged approximately centrally on the side of the housing 3 opposite the cleaning device 6 and can be driven by a drive motor 9. In addition, a servomotor 10 is provided with which the drive wheel 8 can be rotated together with the drive motor 9 in order to be able to change the drive direction of the drive wheel 8 with respect to the housing 3. In this way it is possible to change the direction of movement of the device 2 on the surface 1 even with only one drive wheel 8.
Die Vorrichtung 2 liegt in diesem Fall mit der länglichen Reinigungsvorrichtung 6 und nur einem Antriebsrad 8 auf der Fläche 1 auf.In this case, the device 2 rests on the surface 1 with the elongated cleaning device 6 and only one drive wheel 8.
In beiden Ausführungsbeispielen ist die Auflage der Vorrichtung 2 auf der Fläche 1 mechanisch nicht überbestimmt und steht die Anziehungskraft der Vorrichtung 2 zu der Fläche 1 in einem festgelegten Verhältnis zur Anpreßkraft der Reinigungseinrichtung 6 gegen die Fläche 1 , so daß durch Einstellung des Unterdrucks zwischen der Vorrichtung 2 und der Fläche 1 die Anpreßkraft der Reinigungseinrichtung 6 gegen die Fläche 1 gezielt eingestellt werden kann. Weiterhin ist den beiden Ausführungsformen eine Regelung der Anpreßkraft der Reinigungsvorrichtung 6 möglich, wobei als Regelgröße sowohl der Unterdruck als auch direkt die Anpreßkraft gemessen und als Stellgröße die Leistung des Gebläses 4 verwendet werden kann.In both exemplary embodiments, the support of the device 2 on the surface 1 is not mechanically overdetermined and the attraction force of the device 2 to the surface 1 is in a fixed ratio to the contact pressure of the cleaning device 6 against the surface 1, so that by setting the negative pressure between the device 2 and the surface 1, the contact pressure of the cleaning device 6 against the surface 1 can be set in a targeted manner. Furthermore, the two embodiments are able to regulate the contact pressure of the cleaning device 6, the vacuum being measured as well as the contact pressure being measured directly and the output of the blower 4 being used as the manipulated variable.
Mit der erfindungsgemäßen Lösung kann mit sehr geringem Aufwand eine definierte und in Grenzen einstellbare Anpreßkraft der Arbeitsvorrichtung bzw. Reinigungsvorrichtung 6 erzielt werden. With the solution according to the invention, a defined and adjustable contact pressure of the working device or cleaning device 6 can be achieved with very little effort.

Claims

Patentansprüche claims
Vorrichtung zum Durchführen von Arbeiten an einer Fläche (1), mit einer Einrichtung (4) zum Erzeugen eines Unterdrucks zwischen der Vorrichtung (2) und der Fläche (1), wenigstens einer Auflage (8) zum Abstützen gegen die Fläche (1) und einer Arbeitsvorrichtung (6) zum Bearbeiten der Fläche (1), dadurch gekennzeichnet, dass sich die Vorrichtung (2) auch mittels der Arbeitsvorrichtung (6) gegen die Fläche (1) abstützt und die Arbeitsvorrichtung (6) und die wenigstens eine Auflage (8) eine Dreipunktauflage bilden.Device for performing work on a surface (1), with a device (4) for generating a vacuum between the device (2) and the surface (1), at least one support (8) for supporting against the surface (1) and a working device (6) for working the surface (1), characterized in that the device (2) is also supported by the working device (6) against the surface (1) and the working device (6) and the at least one support (8 ) form a three-point support.
Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Vorrichtung (2) zwei Auflagen (8) aufweist und die Auflagepunkte der Auflagen (8) und der Arbeitsvorrichtung (6) ein gleichschenkliges Dreieck bilden, dessen Basis sich zwischen den Auflagepunkten der Auflagen (8) befindet.Device according to claim 1, characterized in that the device (2) has two supports (8) and the support points of the supports (8) and the working device (6) form an isosceles triangle, the base of which lies between the support points of the supports (8) located.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Vorrichtung eine Auflage (8) aufweist, die Arbeitsvorrichtung (6) länglich ist und sich die Vorrichtung (2) mittels der Arbeitsvorrichtung (6) gegen die Fläche (1) entlang einer Strecke abstützt, deren Verlängerung neben dem Auflagepunkt der einen Auflage (8) liegt.3. Device according to claim 1, characterized in that the device has a support (8), the working device (6) is elongated and the device (2) is supported by the working device (6) against the surface (1) along a distance whose extension lies next to the support point of one support (8).
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass wenigstens eine Auflage (8) von einer Antriebseinrichtung zum Bewegen der Vorrichtung auf der Fläche (1) gebildet wird.4. Device according to one of claims 1 to 3, characterized in that at least one support (8) is formed by a drive device for moving the device on the surface (1).
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Antriebsrichtung der Antriebseinrichtung (8) veränderbar ist.5. The device according to claim 4, characterized in that the drive direction of the drive device (8) is variable.
6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Vorrichtung (2) eine Einrichtung zum Erfassen eines Maßes für den Unterdruck zwischen der Vorrichtung (2) und der Fläche (1) aufweist. 6. Device according to one of claims 1 to 5, characterized in that the device (2) has a device for detecting a measure of the negative pressure between the device (2) and the surface (1).
Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Vorrichtung (2) eine Einrichtung zum Erfassen eines Maßes für die Anpresskraft der Arbeitsvorrichtung (6) an die Fläche (1) aufweist. Device according to one of claims 1 to 5, characterized in that the device (2) has a device for detecting a measure of the contact pressure of the working device (6) on the surface (1).
8. Verfahren zum Betreiben einer Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Einrichtung (4) zum Erzeugen eines Unterdrucks derart angesteuert wird, dass der erzeugte Unterdruck eine Anpresskraft der Vorrichtung (2) an die Fläche (1) erzeugt, die unter Berücksichtigung des Angriffspunkts der Anpresskraft an der Vorrichtung (2) und der Anordnung des Auflagepunkts der wenigstens einen Auflage (8) und der Arbeitsvorrichtung (6) zu einer vorgegebenen Anpresskraft der Arbeitsvorrichtung (6) an die Fläche (1) führt.8. The method for operating a device according to one of claims 1 to 7, characterized in that the device (4) for generating a negative pressure is controlled such that the negative pressure generated generates a pressing force of the device (2) on the surface (1) which, taking into account the point of application of the contact pressure on the device (2) and the arrangement of the contact point of the at least one support (8) and the working device (6), leads to a predetermined contact pressure of the working device (6) on the surface (1).
9. Verfahren nach Anspruch 8 zum Betreiben einer Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass ein Maß für den Unterdruck zwischen der Vorrichtung (2) und der Fläche (1) bestimmt und als Ist-Größe zur Regelung der Einrichtung (4) zur Erzeugung eines Unterdrucks verwendet wird.9. The method according to claim 8 for operating a device according to claim 6, characterized in that a measure of the negative pressure between the device (2) and the surface (1) is determined and as an actual variable for controlling the device (4) for generation a negative pressure is used.
10. Verfahren nach Anspruch 8 zum Betreiben einer Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass ein Maß für die Anpresskraft der Arbeitsvorrichtung (6) an die Fläche (1) erfasst wird und zur Erzielung des dafür vorgegebenen Werts für eine Regelung der Einrichtung (4) zur Erzeugung eines Unterdrucks verwendet wird. 10. The method according to claim 8 for operating a device according to claim 7, characterized in that a measure of the contact pressure of the working device (6) against the surface (1) is detected and to achieve the value specified for this purpose for regulating the device (4th ) is used to generate a vacuum.
EP01931545A 2000-04-26 2001-03-23 Device for carrying out works on a surface Expired - Lifetime EP1278448B1 (en)

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DE10020503 2000-04-26
DE10020503A DE10020503A1 (en) 2000-04-26 2000-04-26 Machining appliance incorporates vacuum generator between machining appliance and machined surface, with support and working appliance
PCT/EP2001/003306 WO2001080703A1 (en) 2000-04-26 2001-03-23 Device for carrying out works on a surface

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DE10020503A1 (en) 2001-10-31
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US7093318B2 (en) 2006-08-22
EP1278448B1 (en) 2008-09-10
DE50114310D1 (en) 2008-10-23
ES2312431T3 (en) 2009-03-01
US20030074752A1 (en) 2003-04-24
ATE407614T1 (en) 2008-09-15
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CA2405059A1 (en) 2001-11-01
AU2001258294A1 (en) 2001-11-07

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