EP1116551B1 - Hand guided sanding device - Google Patents

Hand guided sanding device Download PDF

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Publication number
EP1116551B1
EP1116551B1 EP00811160A EP00811160A EP1116551B1 EP 1116551 B1 EP1116551 B1 EP 1116551B1 EP 00811160 A EP00811160 A EP 00811160A EP 00811160 A EP00811160 A EP 00811160A EP 1116551 B1 EP1116551 B1 EP 1116551B1
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EP
European Patent Office
Prior art keywords
sanding
housing
hand guided
handle
grip surface
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.)
Expired - Lifetime
Application number
EP00811160A
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German (de)
French (fr)
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EP1116551A3 (en
EP1116551A2 (en
EP1116551B8 (en
Inventor
Roland Legner
Silvio Vogt
Heinz-Joachim Schneider
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Hilti AG
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Hilti AG
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Publication of EP1116551A2 publication Critical patent/EP1116551A2/en
Publication of EP1116551A3 publication Critical patent/EP1116551A3/en
Publication of EP1116551B1 publication Critical patent/EP1116551B1/en
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Publication of EP1116551B8 publication Critical patent/EP1116551B8/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02Construction of casings, bodies or handles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor

Definitions

  • the innovation relates to a hand - held grinder according to the preamble of Protection claim 1, as known for example from EP 0 936 033 A.
  • Wood, plastic, gypsum or even metal are grinding devices in the most diverse Implementations used.
  • the most common types of grinders are either Orbital sander or eccentric sander, in which the component of a motor driven, a flat grinding movement exporting grinding element processed is used to eliminate mass inaccuracies and depending on the used Sanding to achieve a more or less smooth surface.
  • the housing of the known grinding devices extend substantially above the Grinding surface and serve to accommodate the drive motor and a transmission. Most of the devices also have a laterally projecting housing part in which more Electronic components are housed. The laterally projecting housing part is used In many cases, the attachment of a dust bag or the like devices.
  • the known grinding devices are usually performed with two hands.
  • To the laterally projecting housing part is designed as a handle.
  • At the lateral protruding, designed as a handle housing part facing away from the central Housing is arranged a second handle.
  • the grinder is usually performed with one hand. This takes the User the grinder in the head area of the central housing, the one Has support surface for the hand.
  • the known grinding machines has in the Einhand entry the guide hand a relatively large distance from the Abrasive surface on. This gives the user a feeling for the course of the Surface lost. Due to the unfavorable ratio of the dimension of Grinding surface of the grinder to the height of the grip position above the grinding surface is the Tilting moment very large. There is a risk that due to a tilting of the Grinder scoring and grinding marks are generated in the surface of the component and the grinding result is unsatisfactory. For grinding operations on vertical Walls in which the device is held with vertical alignment of its grinding surface and when grinding roundings of a component is due to the distance of the Center of gravity of the grip position an increased effort required.
  • the object of the present innovation is therefore to address these disadvantages of the state of the art Technique to remedy. It is to be created a hand-guided grinder in which a one-handed guide with little effort is possible. The danger of Sanding marks due to tilting of the grinder should be reduced. It should the device for the widest possible use in one or two-hand operation be prepared in which the user for him and the particular application can choose the most favorable attitude of the grinder.
  • the solution of these tasks consists in an innovation, which in the characterizing Section of the protection claim 1 features.
  • advantageous Further developments of the innovation and / or preferred embodiments are Subject of the dependent claims.
  • the subject of the innovation is thus a Hand-held grinder for a, a flat grinding movement exporting Abrasive element that can be mounted on a motor-driven sanding pad.
  • the sanding pad is mounted on a shaft that protrudes from a central device housing extends axially above the grinding plate and the inclusion of a gear unit and a motor.
  • the grinder has a main handle and a Additional handle for two-handed operation of the device, which handles on two opposite sides of the central device housing, substantially laterally protrude from the central device housing.
  • the central device housing has an axial the sanding plate subsequent housing section on which the central device housing projected laterally at least partially and with a gripping surface for a One-handed operation is equipped.
  • Housing section adjacent to the sanding pad is a more sensitive One-handed operation possible.
  • the grip position is significantly closer to the grinding surface.
  • the deeper grip position reduces the tilting moment. This reduces the risk of a unsatisfactory grinding pattern due to tilting of the grinder.
  • the deeper Handle position leads to a one-hand guide on non-horizontal surfaces to a reduced effort and ensures fatigue-free working.
  • the axial projection of the gripping surface and the flat grinding surface formed by the sanding pad Cover each other substantially.
  • this is the projection a substantial portion of the gripping surface within the grinding surface so that the Housing section with the additional gripping surface when working in near-edge areas the grinding surface is not obstructed.
  • the central Appliance housing opposite to a running through the center of the grinding plate Center axis, along a connecting straight line of the main handle and the Additional handle, offset in the direction of the auxiliary handle is arranged. there extend at least 3/5 of the gripping surface of the central device housing in essential towards the main handle. Due to the axis-parallel displacement of central device housing from the center of the grinding surface of the sanding pad, the Gripper surface can be positioned even better over the center of gravity of the device, which in advantageously coincides with the center of the grinding plate. This is the result Uniformity of the force exerted on the grinding surface pressing force in the processing of Surface of a component for the user even better controllable.
  • Sections of the gripping surface advantageously extend over about 240 ° to about 300 ° of the Circumference of the central device housing, so that the user's hand the central Device housing can embrace even better and the leadership of the grinder is improved.
  • the gripping surface on the auxiliary handle borders By the outer contours of the gripping surface and the auxiliary handle preferably continuously merge into one another, are protruding edges in the Operation can lead to disabilities, avoided.
  • the auxiliary handle is lateral Extendable direction.
  • One or more detent positions allow a locking of the Additional handle in different far extended positions. This way you can the user selects the most favorable and convenient arrangement of the handle positions for him.
  • the additional handle protrudes beyond the pushed state not the grinding surface.
  • the with the gripping surface equipped housing portion to an arm of the bow-shaped Main handle adjoins.
  • the two parts are connected to each other, bolted, for example.
  • the illustrated in Fig. 1 and 2 embodiment of the invention hand-held grinder carries in each case the entire reference numeral 1.
  • Das Grinder 1 has a central device housing 4, from which a sanding pad 2 protrudes, the is motor driven.
  • the drive motor usually an electric motor, the gearbox and optionally further units, such as a fan for a Dust extraction, are housed in the central device housing 4.
  • On one side of the central device housing 4 protrudes laterally from a main handle 6, which the device electronics and houses the operation switch for the device.
  • the energy supply of the Grinder is made by an unspecified supply cable, the Main handle 6 is attached and can be connected, for example, to the mains.
  • a Additional handle 8 arranged for a two-handed operation.
  • a bead-like widening 5 of the housing provided, which offers the user, if necessary, another gripping position.
  • An axially immediately adjacent to the grinding plate 2 housing section 9 indicates its top a gripping surface 10.
  • the housing section 9 projects beyond the central Device housing 4 at least partially laterally and serves, for example, the Recording a fan wheel for a dust extraction.
  • the arrangement of the gripping surface 10th is chosen such that a one-hand operation is possible, the Tipping moment is kept as small as possible.
  • This is the substantially horizontal running Gripping surface 10 at a mean distance from one through the flat support surface arranged grinding pad 3 of the grinding plate 2, which is about 100 mm about 140 mm.
  • the central device housing 4 is with respect to a through the Center of the sanding pad 2 extending center axis A, along a connecting line from the main handle 6 to the additional handle 8, offset in the direction of the auxiliary handle 8 arranged.
  • At least 3/5 of the additional gripping surface 10 extend in essential of central device housing 4 in the direction of the main handle 6. Obviously engages a portion of the gripping surface 10, the central device housing in one Peripheral range, which is about 240 ° to about 320 °. For ergonomic reasons is the gripping surface 10 is slightly sloping in the direction of the main handle 6. The Projection of the additional gripping surface 10 and the grinding surface 3 overlap each other in the essential. In this case, a large part of the projection of the additional gripping surface 10 within the grinding surface 3, so that working close to the edge is possible.
  • the main handle 6 is bent like a bow and borders with one arm to the the additional gripping surface 10 having housing portion 9 at. Below this Arms of the main handle 6 extends a jam catcher 7.
  • a jam catcher 7 By the bow-shaped design of the main handle 6 is an intervention space for additional Gripping surface 10 created.
  • the borders additional gripping surface 10 to the auxiliary handle 8 at.
  • the go Outer contours of the additional gripping surface 10 substantially continuously into the contour of the auxiliary handle 8 via.
  • the additional handle 8 is advantageously designed extendable. For this purpose it is stored in unspecified guide rails, in the additional Gripping surface 10 having housing portion 9 are arranged. Rest positions in the Guide rails allow, if necessary, a different levels of extension of the Additional handle 8.
  • the additional handle 8 in a near-edge work not obstructed he does not dominate the sliding plate 2 in the inserted state.
  • the further gripping position on the bead-like widening 5 the additional gripping surface 10 on the device section 9 and the auxiliary handle 8 can with be coated a vibration-damping material or entirely from one be made of such material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

Die Neuerung betrifft ein handgeführtes Schleifgerät gemäss dem Oberbegriff des Schutzanspruchs 1, wie zum Beispiel aus EP 0 936 033 A bekannt.The innovation relates to a hand - held grinder according to the preamble of Protection claim 1, as known for example from EP 0 936 033 A.

Zur Bearbeitung von ebenen, konkaven oder konvexen Oberflächen von Bauteilen aus Holz, Kunststoff, Gips oder auch Metall werden Schleifgeräte in den unterschiedlichsten Ausführungen eingesetzt. Die gebräuchlichsten Typen von Schleifgeräten sind entweder Schwingschleifer oder Exzenterschleifer, bei denen das Bauteil von einem motorisch angetriebenen, eine ebene Schleifbewegung ausführenden Schleifelement bearbeitet wird, um Massungenauigkeiten zu beseitigen und in Abhängigkeit vom verwendeten Schleifelement eine mehr oder weniger glatte Oberfläche zu erzielen.For machining flat, concave or convex surfaces of components Wood, plastic, gypsum or even metal are grinding devices in the most diverse Implementations used. The most common types of grinders are either Orbital sander or eccentric sander, in which the component of a motor driven, a flat grinding movement exporting grinding element processed is used to eliminate mass inaccuracies and depending on the used Sanding to achieve a more or less smooth surface.

Die Gehäuse der bekannten Schleifgeräte erstrecken sich im wesentlichen oberhalb der Schleiffläche und dienen der Unterbringung des Antriebsmotors und eines Getriebes. Meist weisen die Geräte auch einen lateral abragenden Gehäuseteil auf, in dem weitere Elektronikkomponenten untergebracht sind. Der lateral abragende Gehäuseteil dient vielfach auch der Befestigung eines Staubfangsackes oder dergleichen Vorrichtungen. Im Betrieb werden die bekannten Schleifgeräte üblicherweise mit zwei Händen geführt. Dazu ist der lateral abragende Gehäuseteil als Handgriff ausgebildet. An der dem lateral abragenden, als Handgriff ausgebildeten Gehäuseteil abgewandten Seite des zentralen Gehäuses ist ein zweiter Handgriff angeordnet. Durch die Zweihandbedienung ist auf die zwischen den beiden Handgriffen angeordnete Schleiffläche ein grösserer Druck ausübbar und die plane Auflage des Geräts auf dem Bauteil recht gut kontrollierbar.The housing of the known grinding devices extend substantially above the Grinding surface and serve to accommodate the drive motor and a transmission. Most of the devices also have a laterally projecting housing part in which more Electronic components are housed. The laterally projecting housing part is used In many cases, the attachment of a dust bag or the like devices. in the Operation, the known grinding devices are usually performed with two hands. To the laterally projecting housing part is designed as a handle. At the lateral protruding, designed as a handle housing part facing away from the central Housing is arranged a second handle. By the two hand operation is on the between the two handles arranged grinding surface a greater pressure exercisable and the plane support of the device on the component quite well controlled.

Für die Feinbearbeitung von Oberflächen, bei der kein so hoher Anpressdruck erforderlich ist, wird das Schleifgerät üblicherweise mit nur einer Hand geführt. Dazu ergreift der Anwender das Schleifgerät im Kopfbereich des zentralen Gehäuses, der eine Auflagefläche für die Hand aufweist. Bei den bekannten Schleifgeräten weist bei der Einhandführung die Führungshand einen relativ grossen Abstand von der Schleifoberfläche auf. Dadurch geht für den Anwender das Gefühl für den Verlauf der Oberfläche verloren. Aufgrund des ungünstigen Verhältnisses der Abmessung der Schleiffläche des Schleifgeräts zur Höhe der Griffposition über der Schleiffläche ist das Kippmoment sehr gross. Dadurch besteht die Gefahr, dass infolge eines Verkippens des Schleifgeräts Riefen und Schleifspuren in der Oberfläche des Bauteils erzeugt werden und das Schleifergebnis unbefriedigend ausfällt. Bei Schleifvorgängen an vertikalen Wänden, in denen das Gerät mit senkrechter Ausrichtung seiner Schleiffläche gehalten wird und beim Schleifen von Rundungen eines Bauteils ist aufgrund des Abstandes des Geräteschwerpunktes von der Griffposition ein erhöhter Kraftaufwand erforderlich.For fine finishing of surfaces where no such high contact pressure is required is, the grinder is usually performed with one hand. This takes the User the grinder in the head area of the central housing, the one Has support surface for the hand. In the known grinding machines has in the Einhandführung the guide hand a relatively large distance from the Abrasive surface on. This gives the user a feeling for the course of the Surface lost. Due to the unfavorable ratio of the dimension of Grinding surface of the grinder to the height of the grip position above the grinding surface is the Tilting moment very large. There is a risk that due to a tilting of the Grinder scoring and grinding marks are generated in the surface of the component and the grinding result is unsatisfactory. For grinding operations on vertical Walls in which the device is held with vertical alignment of its grinding surface and when grinding roundings of a component is due to the distance of the Center of gravity of the grip position an increased effort required.

Aufgabe der vorliegenden Neuerung ist es daher, diesen Nachteilen des Stands der Technik abzuhelfen. Es soll ein handgeführtes Schleifgerät geschaffen werden, bei dem eine Einhandführung mit geringem Kraftaufwand ermöglicht ist. Die Gefahr von Schleifspuren infolge eines Verkippens des Schleifgeräts soll verringert sein. Dabei soll das Gerät für einen möglichst vielfältigen Einsatz im Ein- oder Zweihandbetrieb vorbereitet sein, bei dem der Anwender die für ihn und den jeweiligen Anwendungszweck günstigste Haltung des Schleifgeräts wählen kann.The object of the present innovation is therefore to address these disadvantages of the state of the art Technique to remedy. It is to be created a hand-guided grinder in which a one-handed guide with little effort is possible. The danger of Sanding marks due to tilting of the grinder should be reduced. It should the device for the widest possible use in one or two-hand operation be prepared in which the user for him and the particular application can choose the most favorable attitude of the grinder.

Die Lösung dieser Aufgaben besteht in einer Neuerung, welche die im kennzeichnenden Abschnitt des Schutzanspruchs 1 angeführten Merkmale umfasst. Vorteilhafte Weiterbildungen der Neuerung und/oder bevorzugte Ausführungsbeispiele sind Gegenstand der abhängigen Schutzansprüche. Gegenstand der Neuerung ist somit ein handgeführtes Schleifgerät für ein, eine ebene Schleifbewegung ausführendes Schleifelement, das auf einem motorisch bewegbaren Schleifteller montierbar ist. Der Schleifteller ist auf einer Welle montiert, die aus einem zentralen Gerätegehäuse ragt, das sich axial oberhalb des Schleiftellers erstreckt und der Aufnahme einer Getriebeeinheit und eines Motors dient. Das Schleifgerät besitzt einen Haupthandgriff und einen Zusatzhandgriff zur Zweihandbedienung des Geräts, welche Handgriffe an zwei voneinander abgewandten Seiten des zentralen Gerätegehäuses, im wesentlichen lateral vom zentralen Gerätegehäuse abragen. Das zentrale Gerätegehäuse weist einen axial an den Schleifteller anschliessenden Gehäuseabschnitt auf, der das zentrale Gerätegehäuse lateral wenigstens bereichsweise überragt und mit einer Greiffläche für eine Einhandbedienung ausgestattet ist. The solution of these tasks consists in an innovation, which in the characterizing Section of the protection claim 1 features. advantageous Further developments of the innovation and / or preferred embodiments are Subject of the dependent claims. The subject of the innovation is thus a Hand-held grinder for a, a flat grinding movement exporting Abrasive element that can be mounted on a motor-driven sanding pad. Of the The sanding pad is mounted on a shaft that protrudes from a central device housing extends axially above the grinding plate and the inclusion of a gear unit and a motor. The grinder has a main handle and a Additional handle for two-handed operation of the device, which handles on two opposite sides of the central device housing, substantially laterally protrude from the central device housing. The central device housing has an axial the sanding plate subsequent housing section on which the central device housing projected laterally at least partially and with a gripping surface for a One-handed operation is equipped.

Indem das zentrale Gerätegehäuse einen mit einer Greiffläche ausgestatten Gehäuseabschnitt aufweist, der an den Schleifteller angrenzt, ist eine feinfühligere Einhandführung ermöglicht. Die Griffposition ist deutlich näher an der Schleiffläche. Durch die tiefere Griffposition ist das Kippmoment reduziert. Dies verringert die Gefahr eines unbefriedigenden Schleifbildes infolge eines Verkippens des Schleifgeräts. Die tiefere Griffposition führt auch bei der Einhandführung an nicht horizontalen Flächen zu einem verringerten Kraftaufwand und gewährleistet ein ermüdungsfreieres Arbeiten.By providing the central device housing one with a gripping surface Housing section adjacent to the sanding pad is a more sensitive One-handed operation possible. The grip position is significantly closer to the grinding surface. By the deeper grip position reduces the tilting moment. This reduces the risk of a unsatisfactory grinding pattern due to tilting of the grinder. The deeper Handle position leads to a one-hand guide on non-horizontal surfaces to a reduced effort and ensures fatigue-free working.

Für eine bessere Ausbalancierung des Schleifgeräts erweist es sich von Vorteil, wenn die axiale Projektion der Greiffläche und die vom Schleifteller gebildete, ebene Schleiffläche einander im wesentlichen überdecken. Zweckmässigerweise liegt dabei die Projektion eines wesentlichen Teils der Greiffläche innerhalb der Schleiffläche, damit der Gehäuseabschnitt mit der zusätzlichen Greiffläche beim Arbeiten in randnahen Bereichen der Schleiffläche nicht behindert.For a better balance of the grinder, it proves to be advantageous if the axial projection of the gripping surface and the flat grinding surface formed by the sanding pad Cover each other substantially. Expediently, this is the projection a substantial portion of the gripping surface within the grinding surface so that the Housing section with the additional gripping surface when working in near-edge areas the grinding surface is not obstructed.

Aus konstruktionstechnischer Sicht und im Hinblick auf den Platzbedarf für die Getriebeeinheit und ein üblicherweise vorgesehenes Lüfterrad für eine Schleifstaubabsaugung erweist sich ein mittlerer Abstand der Greiffläche von der Schleiffläche des Schleiftellers von etwa 100 mm bis etwa 140 mm als zweckmässig. Bei diesem Abstand ist im Gehäuseabschnitt ausreichend Platz für die unterzubringenden Aggregate. Dennoch bleibt eine tiefe Griffposition erhalten, damit eine feinfühlige Einhandführung ermöglicht ist, um höher Feinschleifqualitäten zu erzielen. Die Greiffläche verläuft dabei im wesentlichen parallel zur Schleiffläche und fällt in Richtung des Haupthandgriffs leicht ab. Durch diese ergonomisch optimierte Ausbildung der Greiffläche ruht der Handballen des Anwenders auf dem leicht abfallenden Teil der Greiffläche. Dadurch ist ein ermüdungsfreieres Arbeiten ermöglicht.From a design point of view and in terms of space requirements for the Gear unit and a conventionally provided fan wheel for a Schleifstaubabsaugung proves to be a mean distance of the gripping surface of the grinding surface of Sanding plate of about 100 mm to about 140 mm as appropriate. At this distance is in the housing section sufficient space for the units to be accommodated. Nevertheless, a deep grip position is maintained, so that a sensitive one-handed operation is possible to achieve higher fine grinding qualities. The gripping surface runs thereby essentially parallel to the grinding surface and falls slightly in the direction of the main handle from. This ergonomically optimized design of the gripping surface rests the palm of the hand of the user on the slightly sloping part of the gripping surface. This is one fatigue-free working allows.

Für die Ausbalancierung des Schleifgeräts erweist es sich von Vorteil, wenn das zentrale Gerätegehäuse gegenüber einer durch das Zentrum des Schleiftellers verlaufenden Mittenachse, entlang einer Verbindungsgeraden des Haupthandgriffs und des Zusatzhandgriffs, in Richtung des Zusatzhandgriffs versetzt angeordnet ist. Dabei erstrecken sich wenigstens 3/5 der Greiffläche vom zentralen Gerätegehäuse im wesentlichen in Richtung des Haupthandgriffs. Durch die achsparallele Verschiebung des zentralen Gerätegehäuses aus dem Zentrum der Schleiffläche des Schleiftellers kann die Greiffläche noch besser über dem Schwerpunkt des Geräts positioniert werden, der in vorteilhafter Weise mit dem Zentrum der Schleifplatte zusammenfällt. Dadurch ist die Gleichmässigkeit der auf die Schleiffläche ausgeübten Druckkraft bei der Bearbeitung der Oberfläche eines Bauteils für den Anwender noch besser kontrollierbar.For the balancing of the grinder, it proves to be advantageous if the central Appliance housing opposite to a running through the center of the grinding plate Center axis, along a connecting straight line of the main handle and the Additional handle, offset in the direction of the auxiliary handle is arranged. there extend at least 3/5 of the gripping surface of the central device housing in essential towards the main handle. Due to the axis-parallel displacement of central device housing from the center of the grinding surface of the sanding pad, the Gripper surface can be positioned even better over the center of gravity of the device, which in advantageously coincides with the center of the grinding plate. This is the result Uniformity of the force exerted on the grinding surface pressing force in the processing of Surface of a component for the user even better controllable.

Abschnitte der Greiffläche erstrecken sich mit Vorteil über etwa 240° bis etwa 300° des Umfangs des zentralen Gerätegehäuses, damit die Hand des Anwenders das zentrale Gerätegehäuse noch besser umgreifen kann und die Führung des Schleifgeräts verbessert ist.Sections of the gripping surface advantageously extend over about 240 ° to about 300 ° of the Circumference of the central device housing, so that the user's hand the central Device housing can embrace even better and the leadership of the grinder is improved.

Aus Platzgründen erweist es sich von Vorteil, wenn die Greiffläche an den Zusatzhandgriff angrenzt. Indem die Aussenkonturen der Greiffläche und des Zusatzhandgriffs vorzugsweise kontinuierlich ineinander übergehen, sind überstehende Kanten, die im Betrieb zu Behinderungen führen können, vermieden.For reasons of space, it proves to be advantageous if the gripping surface on the auxiliary handle borders. By the outer contours of the gripping surface and the auxiliary handle preferably continuously merge into one another, are protruding edges in the Operation can lead to disabilities, avoided.

Für einen besonders komfortablen Zweihandbetrieb ist der Zusatzhandgriff in lateraler Richtung ausziehbar. Eine oder meherere Rastpositionen erlauben eine Arretierung des Zusatzhandgriffs in unterschiedlich weit ausgezogenen Positionen. Auf diese Weise kann der Anwender die für ihn günstigste und bequemste Anordung der Griffpositionen wählen.For a particularly comfortable two-hand operation, the auxiliary handle is lateral Extendable direction. One or more detent positions allow a locking of the Additional handle in different far extended positions. This way you can the user selects the most favorable and convenient arrangement of the handle positions for him.

Damit ein randnahes Arbeiten ermöglicht ist, überragt der Zusatzhandgriff im eingeschobenen Zustand die Schleiffläche nicht.In order to work close to the edge, the additional handle protrudes beyond the pushed state not the grinding surface.

Aus Stabilitätsgründen erweist es sich von Vorteil, wenn der mit der Greiffläche ausgestattete Gehäuseabschnitt an einen Arm des bügelartig ausgebildeten Haupthandgriffs angrenzt. Vorzugsweise sind die beiden Teile miteinander verbunden, beispielsweise verschraubt.For reasons of stability, it proves to be advantageous if the with the gripping surface equipped housing portion to an arm of the bow-shaped Main handle adjoins. Preferably, the two parts are connected to each other, bolted, for example.

Zur Unterdrückung von im Betrieb auftretenden Vibrationen ist der die Greiffläche aufweisende Gehäuseabschnitt mit einer vibrationsdämmenden Beschichtung versehen bzw. gesamthaft aus einem vibrationsdämmenden Material gefertigt.To suppress vibrations occurring during operation of the gripping surface housing section provided with a vibration-damping coating or made entirely of a vibration-damping material.

Im folgenden wird die Neuerung unter Bezugnahme auf ein in den Fig. in verschiedenen Ansichten dargestelltes Ausführungsbeispiel näher erläutert. Es zeigen in teils schematischer Darstellung:

Fig. 1
eine Seitenansicht eines handgeführten Schleifgeräts; und
Fig. 2
eine Draufsicht auf das Schleifgerät gemäss Fig. 1.
In the following, the innovation will be explained in more detail with reference to an embodiment shown in different views in the figures. In a partly schematic representation:
Fig. 1
a side view of a hand-held grinder; and
Fig. 2
a top view of the grinding apparatus according to FIG. 1.

Das in Fig. 1 und 2 dargestellte Ausführungsbeispiel des neuerungsgemässen handgeführten Schleifgeräts trägt jeweils gesamthaft das Bezugszeichen 1. Das Schleifgerät 1 besitzt ein zentrales Gerätegehäuse 4, aus dem ein Schleifteller 2 ragt, der motorisch antreibbar ist. Der Antriebsmotor, üblicherweise ein Elektromotor, das Getriebe und gegebenenfalls noch weitere Aggregate, wie beispielsweise ein Lüfterrad für eine Staubabsaugung, sind im zentralen Gerätegehäuse 4 untergebracht. An einer Seite des zentralen Gerätegehäuses 4 ragt lateral ein Haupthandgriff 6 ab, der die Geräteelektronik und den Betätigungsschalter für das Gerät beherbergt. Die Energieversorgung des Schleifgeräts erfolgt über ein nicht näher bezeichnetes Versorgungskabel, das am Haupthandgriff 6 befestigt ist und beispielsweise an das Stromnetz anschiessbar ist. An der dem Haupthandgriff 6 abgewandten Seite des zentralen Gerätegehäuses 4 ist ein Zusatzhandgriff 8 für eine Zweihandbedienung angeordnet. Am oberen Endabschnitt des zentralen Gerätegehäuses 4 ist eine wulstartige Verbreiterung 5 des Gehäuses vorgesehen, die dem Anwender bei Bedarf eine weitere Greifposition bietet.The illustrated in Fig. 1 and 2 embodiment of the invention hand-held grinder carries in each case the entire reference numeral 1. Das Grinder 1 has a central device housing 4, from which a sanding pad 2 protrudes, the is motor driven. The drive motor, usually an electric motor, the gearbox and optionally further units, such as a fan for a Dust extraction, are housed in the central device housing 4. On one side of the central device housing 4 protrudes laterally from a main handle 6, which the device electronics and houses the operation switch for the device. The energy supply of the Grinder is made by an unspecified supply cable, the Main handle 6 is attached and can be connected, for example, to the mains. At the main handle 6 remote from the central device housing 4 is a Additional handle 8 arranged for a two-handed operation. At the upper end of the central device housing 4 is a bead-like widening 5 of the housing provided, which offers the user, if necessary, another gripping position.

Ein axial unmittelbar an die Schleifplatte 2 anschliessender Gehäuseabschnitt 9 weist an seiner Oberseite eine Greiffläche 10 auf. Der Gehäuseabschnitt 9 überragt das zentrale Gerätegehäuse 4 wenigstens bereichsweise lateral und dient beispielsweise der Aufnahme eines Lüfterrads für eine Staubabsaugung. Die Anordnung der Greiffläche 10 ist dabei derart gewählt, dass eine Einhandbedienung ermöglicht ist, wobei das Kippmoment möglichst klein gehalten ist. Dazu ist die im wesentlichen horizontal verlaufende Greiffläche 10 in einem mittleren Abstand von einer durch die ebene Auflagefläche des Schleiftellers 2 definierten Schleiffläche 3 angeordnet, der etwa 100 mm bis etwa 140 mm beträgt. Das zentrale Gerätegehäuse 4 ist in Bezug auf eine durch das Zentrum des Schleiftellers 2 verlaufende Mittenachse A, entlang einer Verbindungslinie vom Haupthandgriff 6 zum Zusatzhandgriff 8, in Richtung des Zusatzhandgriffs 8 versetzt angeordnet. Wenigstens 3/5 der zusätzlichen Greiffläche 10 erstrecken sich im wesentlichen von zentralen Gerätegehäuse 4 in Richtung des Haupthandgriffs 6. Dabei umgreift ein Abschnitt der Greiffläche 10 das zentrale Gerätegehäuse in einem Umfangsbereich, der etwa 240° bis etwa 320° beträgt. Aus ergonomischen Gründen ist die Greiffläche 10 in Richtung des Haupthandgriffs 6 leicht abfallend ausgebildet. Die Projektion der zusätzlichen Greiffläche 10 und die Schleiffläche 3 überdecken einander im wesentlichen. Dabei liegt ein grosser Teil der Projektion der zusätzlichen Greiffläche 10 innerhalb der Schleiffläche 3, damit ein randnahes Arbeiten ermöglicht ist. An axially immediately adjacent to the grinding plate 2 housing section 9 indicates its top a gripping surface 10. The housing section 9 projects beyond the central Device housing 4 at least partially laterally and serves, for example, the Recording a fan wheel for a dust extraction. The arrangement of the gripping surface 10th is chosen such that a one-hand operation is possible, the Tipping moment is kept as small as possible. This is the substantially horizontal running Gripping surface 10 at a mean distance from one through the flat support surface arranged grinding pad 3 of the grinding plate 2, which is about 100 mm about 140 mm. The central device housing 4 is with respect to a through the Center of the sanding pad 2 extending center axis A, along a connecting line from the main handle 6 to the additional handle 8, offset in the direction of the auxiliary handle 8 arranged. At least 3/5 of the additional gripping surface 10 extend in essential of central device housing 4 in the direction of the main handle 6. Dabei engages a portion of the gripping surface 10, the central device housing in one Peripheral range, which is about 240 ° to about 320 °. For ergonomic reasons is the gripping surface 10 is slightly sloping in the direction of the main handle 6. The Projection of the additional gripping surface 10 and the grinding surface 3 overlap each other in the essential. In this case, a large part of the projection of the additional gripping surface 10 within the grinding surface 3, so that working close to the edge is possible.

Der Haupthandgriff 6 ist bügelartig gebogen ausgebildet und grenzt mit einem Arm an den die zusätzliche Greiffläche 10 aufweisenden Gehäuseabschnitt 9 an. Unterhalb dieses Arms des Haupthandgriffs 6 erstreckt sich eine Staugfangvorrichtung 7. Durch die bügelartige Ausbildung des Haupthandgriffs 6 ist ein Eingreifraum zur zusätzlichen Greiffläche 10 geschaffen. In die entgegengesetzte laterale Richtung grenzt die zusätzliche Greiffläche 10 an den Zusatzhandgriff 8 an. Vorzugsweise gehen die Aussenkonturen der zusätzlichen Greiffläche 10 im wesentlichen stufenlos in die Kontur des Zusatzhandgriffs 8 über. Der Zusatzhandgriff 8 ist mit Vorteil ausziehbar ausgebildet. Dazu ist er in nicht näher bezeichneten Führungsschienen gelagert, die im die zusätzliche Greiffläche 10 aufweisenden Gehäuseabschnitt 9 angeordnet sind. Rastpositionen in den Führungsschienen ermöglichen bei Bedarf ein verschieden weites Ausziehen des Zusatzhandgriffs 8. Damit der Zusatzhandgriff 8 bei einem randnahen Arbeiten nicht behindert, überragt er im eingeschobenen Zustand die Schleifplatte 2 nicht. Der Haupthandgriff 6, die weitere Greifposition an der wulstartigen Verbreiterung 5, die zusätzliche Greiffläche 10 am Geräteabschnitt 9 und der Zusatzhandgriff 8 können mit einem vibrationsdämmenden Material beschichtet sein bzw. gänzlich aus einem derartigen Material gefertigt sein.The main handle 6 is bent like a bow and borders with one arm to the the additional gripping surface 10 having housing portion 9 at. Below this Arms of the main handle 6 extends a jam catcher 7. By the bow-shaped design of the main handle 6 is an intervention space for additional Gripping surface 10 created. In the opposite lateral direction the borders additional gripping surface 10 to the auxiliary handle 8 at. Preferably, the go Outer contours of the additional gripping surface 10 substantially continuously into the contour of the auxiliary handle 8 via. The additional handle 8 is advantageously designed extendable. For this purpose it is stored in unspecified guide rails, in the additional Gripping surface 10 having housing portion 9 are arranged. Rest positions in the Guide rails allow, if necessary, a different levels of extension of the Additional handle 8. So that the additional handle 8 in a near-edge work not obstructed, he does not dominate the sliding plate 2 in the inserted state. Of the Main handle 6, the further gripping position on the bead-like widening 5, the additional gripping surface 10 on the device section 9 and the auxiliary handle 8 can with be coated a vibration-damping material or entirely from one be made of such material.

Claims (10)

  1. Hand guided sanding device with a sanding element performing a smooth sanding movement, which element can be mounted on a motor driven sanding plate (2) which is in turn mounted on a shaft which projects from a central device housing (4) which extends axially above the sanding plate (2) and serves to receive the gear unit and a motor, and with a main handle (6) and an additional handle (8) for two-handed operation of the device (1), which handles (6, 8) project essentially laterally from the central device housing (4), characterised in that the central housing device (4) exhibits a housing section (9) connected axially to the sanding plate (3), which section projects at least in certain regions laterally from the central device housing (4) and is equipped with a grip surface (10) for single-handed operation.
  2. Hand guided sanding device according to Claim 1, characterised in that the axial projection of the grip surface (10) and a flat sanding surface (3) formed by the sanding plate (2) essentially overlap each other, wherein the projection of the grip surface (10) lies essentially inside the sanding surface (3).
  3. Hand guided sanding device according to Claim 1 or 2, characterised in that the grip surface (10) runs essentially parallel with the sanding surface (3), and is designed so that drops slightly in the direction of the main handle (6), wherein the average distance of the grip surface (10) from the sanding surface (3) of the sanding plate (2) is approximately 100 mm to approximately 140 mm.
  4. Hand guided sanding device according to one of the preceding claims, characterised in that the central device housing (4) is arranged opposite a central axis (A) running through the centre of the sanding plate (3), along a connecting straight line of the main handle (6) and of the additional handle (8), so that it is offset in the direction of the additional handle (8), and in that at least 3/5 of the grip surface (10)( extends from the central device housing (4) essentially ion the direction of the main handle (6).
  5. Hand guided sanding device according to one of the preceding claims, characterised in that sections of the grip surface (10) extend through an angle of approximately 240° to approximately 320° of the circumference of the central device housing (4).
  6. Hand guided sanding device according to Claim 5, characterised in that the grip surface (10) is adjacent to the additional handle (8), wherein the outer contours preferentially and continuously merge into each other.
  7. Hand guided sanding device according to Claim 6, characterised in that the additional handle (8) can be pulled out in the lateral direction and preferably exhibits one or more stop positions.
  8. Hand guided sanding device according to Claim 7, characterised in that the additional handle (8) does not project from the sanding surface (3) when retracted.
  9. Hand guided sanding device according to one of the preceding claims, characterised in that the housing section (9) provided with a grip surface (10) lies adjacent to the arm of the stirrup-shaped main handle (6) and is preferably connected to it.
  10. Hand guided sanding device according to one of the preceding claims, characterised in that the housing section (9) exhibiting the grip surface (10) exhibits a vibration-damping coating and consists generally of a vibration-damping material.
EP00811160A 1999-12-16 2000-12-07 Hand guided sanding device Expired - Lifetime EP1116551B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29922108U DE29922108U1 (en) 1999-12-16 1999-12-16 Handheld grinder
DE29922108U 1999-12-16

Publications (4)

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EP1116551A2 EP1116551A2 (en) 2001-07-18
EP1116551A3 EP1116551A3 (en) 2003-09-24
EP1116551B1 true EP1116551B1 (en) 2005-03-23
EP1116551B8 EP1116551B8 (en) 2006-04-05

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EP00811160A Expired - Lifetime EP1116551B8 (en) 1999-12-16 2000-12-07 Hand guided sanding device

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US (1) US6699111B2 (en)
EP (1) EP1116551B8 (en)
JP (1) JP2001191243A (en)
DE (2) DE29922108U1 (en)

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JP2001191243A (en) 2001-07-17
US6699111B2 (en) 2004-03-02
EP1116551A3 (en) 2003-09-24
EP1116551A2 (en) 2001-07-18
EP1116551B8 (en) 2006-04-05
DE50009856D1 (en) 2005-04-28
DE29922108U1 (en) 2000-02-17
US20010004580A1 (en) 2001-06-21

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