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EP1419031B1 - Sanding hand machine tool - Google Patents

Sanding hand machine tool Download PDF

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Publication number
EP1419031B1
EP1419031B1 EP02742814A EP02742814A EP1419031B1 EP 1419031 B1 EP1419031 B1 EP 1419031B1 EP 02742814 A EP02742814 A EP 02742814A EP 02742814 A EP02742814 A EP 02742814A EP 1419031 B1 EP1419031 B1 EP 1419031B1
Authority
EP
European Patent Office
Prior art keywords
abrasive sheet
clamping
clamping jaw
abrasive
supported
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
EP02742814A
Other languages
German (de)
French (fr)
Other versions
EP1419031A1 (en
Inventor
Sabine Bocka
Uwe Engelfried
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1419031A1 publication Critical patent/EP1419031A1/en
Application granted granted Critical
Publication of EP1419031B1 publication Critical patent/EP1419031B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/02Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
    • B24D15/023Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of flexible material
    • 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
    • B24B23/04Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor

Definitions

  • the invention relates to a grinding hand tool machine according to the preamble of claim 1.
  • GB patent 23 22 582 is an orbital sander with a sanding pad to accommodate a replaceable Sanding sheet known, according to the preamble of claim 1.
  • the operator must for clamping the sanding sheet insert both hands, the hand tool as possible is to be held on a solid surface.
  • This is one end of the sanding sheet with one hand in one Slot between an open jaw and the top of the abrasive sheet carrier and the jaw with the other hand open to hold release position until the abrasive sheet is fully inserted.
  • After this Letting go of the jaw closes this by spring force and take their pinch position, where they do that Abrasive blade end on an inclined support surface on the Clamping the top of the sanding sheet carrier.
  • This is the Self-leveling grinding sheet to a certain extent because the rotatably suspended jaw on the inclined plane supporting surface rolls outwards and thereby entrains the sanding sheet end.
  • the abrasive hand tool according to the invention with the Features of claim 1 has the advantage that the assembly with new sanding sheets with only one Hand is easier and faster to accomplish, than at the previously known machines. It is also because of that the clamping means the abrasive sheet in a preferred direction let in but not in the opposite direction without separate Release operation, with one-hand operation a firm backlash-free clamping of the sanding sheet on the sanding sheet carrier possible. One-handed operation here means that to insert and fixing the sanding sheet actually only one only hand must be active. The other hand can meantime rest or fix the hand tool, e.g. press against a surface.
  • the jaw has an outer contour whose largest distance to the pivot axis greater than the distance between Swivel axis and top of the abrasive sheet carrier is and in that the jaw to the edge of the abrasive sheet carrier Elastic torsionally biased on one side supported by the abrasive sheet carrier, turns out to be easier
  • the sandpaper is up to the breaking point can be clamped without it being able to release itself.
  • the servo effect is also reinforced by the fact that the Jaw outer contour is saber-like progressively curved.
  • Another advantage is that after the clamping of the Sanding sheet whose tension bwz. Streamline through Nachschieben in the clamping slot is increased, the Clamping device a once inserted abrasive sheet end even with great force against the insertion direction not returns unless a release button is pressed beforehand. The further the abrasive sheet end is pushed under the jaw becomes, the larger the clamping surface and the larger is the clamping.
  • Fig. 1 shows a schematic side view of the grinding hand tool 10 with a rectangular housing 12, at the same time as a handle for holding and guiding the grinding hand tool 10 serves.
  • abrasive sheet carrier 14 which is arranged on the underside of the housing 12.
  • the abrasive sheet carrier 14 carries on his his as a work surface serving bottom 15 an abrasive sheet 16, the with his back on the abrasive sheet carrier 14 and at whose sanding pad 18 is supported.
  • the clamping lever 20 have above a pivot axis 24 a pendulum arm 21 and below a jaw 22, which is curved with saber-shaped Outer contour 27 on a locking surface 23 on the top 13 of the abrasive sheet carrier 14 is supported.
  • the pivot axis 24 sits on a bearing block 28 on the top of the abrasive sheet carrier 14th
  • each of the clamping lever 20 to the outside seeks to pivot, the jaws 22 against the locking surface 23 presses and thus the abrasive sheet end 17, 19 clamps.
  • the pendulum arm 21 carries a serving as a push button 121, protruding elbow, with which he finger pressure is so pivotable - against the compression spring 26 - that the jaws 22 lifts off from the locking surface 23, wherein the gap between the outer contour 27 of the jaw 22nd and the locking surface 23 increases and the abrasive sheet 16 without Another is removable.
  • the compression spring 26 is only so slight biased that the abrasive sheet 16 from the outside by light Pressing against the outer contour 27 of the jaw 22 this against the compression spring 26 and against the clamping direction shifts, the necessary to insert the cleft itself creates and easily with one hand on and nachschiebbar is.
  • the jaw 22 has at least one outer layer made of elastic, rubber-like material with high coefficient of friction, the one relative movement between the abrasive sheet 16 and jaw 22 largely restricts.
  • FIG. 2 shows a top view of the grinding hand tool 10 with the details of the clamping means 20 and the Figures 3 to 6 previously explained for Figure 1 clamping means as a detail.
  • Fig. 7a shows the movement phase of the clamping means before Insert, Fig. 7b when inserting the abrasive sheet end 19 and Fig. 7c after insertion in the end position of the sanding sheet at unfolded clamping effect. It can be seen from this for inserting the abrasive sheet 16, the abrasive sheet end 19 only slightly laterally against the outer contour 27 of the jaw 22 is to press, so that between the jaws 22 and the locking surface 23 forms a gap in which it entry. The clamping lever 20 does not have to be separated from Hand operated.
  • FIGS. 8a and b show the movement phases of the clamping lever 20 upon removal of the abrasive sheet 16, wherein the clamping lever 20 by hand i.e.. by pressing the button 121 in the Clockwise to move about the pivot axis 24 is. there the jaw 22 lifts with its outer contour of Abrasive sheet 16 or from the latching surface 23 in such a way that from the increasing gap, the abrasive sheet end 17, 19 can be easily pulled out and so the sanding sheet 16 is easily solvable.
  • FIG 9 shows an enlarged view of a clamping lever 20, whose axis 24 on a bearing block 228 on the Abrasive sheet carrier 14 is arranged.
  • the clamping lever 20 has a clamping jaw 22, which can be supported relative to the latching surface 23 is, with a at the extreme end of the pendulum arm 21 attacking Tension spring 226, the jaw 22 to the locking surface 23rd looking for.
  • At the extreme end of the pendulum arm 21 has a Articulated socket 222 into which a pivot pin 322 of a button 221 intervenes.
  • the key 221 is an axis supported on the bearing block 228 224 in the direction of the directional arrow 333 by means of finger pressure pivotable and can thus the clamping lever 20 in its open Position for removing a clamped sanding sheet move.
  • a compression spring 227 between the back of Button 221 and the housing 12 of the grinding hand tool 10 arranged.

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

Description

Stand der TechnikState of the art

Die Erfindung bezieht sich auf eine Schleifhandwerkzeugmaschine nach der Gattung des Anspruchs 1.The invention relates to a grinding hand tool machine according to the preamble of claim 1.

Gemäß GB-Patentschrift 23 22 582 ist ein Schwingschleifer mit einem Schleifteller zur Aufnahme eines auswechselbaren Schleifblatts bekannt, gemäß dem Oberbegriff des Anspruchs 1.According to GB patent 23 22 582 is an orbital sander with a sanding pad to accommodate a replaceable Sanding sheet known, according to the preamble of claim 1.

Dabei muß der Bediener zum Festklemmen des Schleifblatts beide Hände einsetzen, wobei die Handwerkzeugmaschine möglichst auf einer festen Unterlage festzuhalten ist. Dabei ist das eine Schleifblattende mit der einen Hand in einen Schlitz zwischen einer geöffneten Klemmbacke und der Oberseite des Schleifblattträgers einzuführen und die Klemmbacke mit der anderen Hand geöffnet Lösestellung zu halten, bis das Schleifblattende vollständig eingeführt ist. Nach dem Loslassen der Klemmbacke schließt sich diese durch Federkraft und nimmt ihre Klemmposition sein, in der sie das Schleifblattende an einer schiefebenen Abstützfläche auf der Oberseite des Schleifblattträgers festklemmt. Dabei wird das Schleifblatt selbsttätig zu einem gewissen Grad nachgespannt, weil sich die drehbar aufgehängte Klemmbacke an der schiefebenen Abstützfläche nach außen hin abwälzt und dabei das Schleifblattende mitnimmt.In this case, the operator must for clamping the sanding sheet insert both hands, the hand tool as possible is to be held on a solid surface. there This is one end of the sanding sheet with one hand in one Slot between an open jaw and the top of the abrasive sheet carrier and the jaw with the other hand open to hold release position until the abrasive sheet is fully inserted. After this Letting go of the jaw closes this by spring force and take their pinch position, where they do that Abrasive blade end on an inclined support surface on the Clamping the top of the sanding sheet carrier. This is the Self-leveling grinding sheet to a certain extent because the rotatably suspended jaw on the inclined plane supporting surface rolls outwards and thereby entrains the sanding sheet end.

Mit dem anderen Schleifblattende war zuvor auf die gleiche Weise zu verfahren, wobei Klemmkraft und Nachspannkraft begrenzt sind. With the other sanding sheet end was previously on the same Way to proceed, with clamping force and Nachspannkraft limited are.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Schleifhandwerkzeugmaschine mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass die Bestückung mit neuen Schleifblättern mit nur einer Hand leichter und schneller zu bewerkstelligen ist, als bei den bisher bekannten Maschinen. Außerdem ist dadurch, dass die Klemmmittel das Schleifblatt in einer Vorzugsrichtung eintreten lassen aber in umgekehrter Richtung nicht ohne gesonderte Betätigung freigeben, mit Einhandbedienung ein festes spielfreies Klemmen des Schleifblattes am Schleifblattträger möglich. Einhandbedienung bedeutet hier, daß zum Einlegen und Fixieren des Schleifblatts tatsächlich nur eine einzige Hand aktiv werden muß. Die andere Hand kann zwischenzeitlich ruhen bzw. die Handwerkzeugmaschine fixieren, z.B. gegen eine Unterlage drücken.The abrasive hand tool according to the invention with the Features of claim 1 has the advantage that the assembly with new sanding sheets with only one Hand is easier and faster to accomplish, than at the previously known machines. It is also because of that the clamping means the abrasive sheet in a preferred direction let in but not in the opposite direction without separate Release operation, with one-hand operation a firm backlash-free clamping of the sanding sheet on the sanding sheet carrier possible. One-handed operation here means that to insert and fixing the sanding sheet actually only one only hand must be active. The other hand can meantime rest or fix the hand tool, e.g. press against a surface.

Dadurch, daß die Außenkontur des Klemmbackens mit ansteigendem Krümmungsradius nach außen gewölbt verläuft, insbesondere im Selbsthemmungsbereich liegend, so daß die Klemmkraft proportional zu einer das Schleifblatt zu lösen suchenden Zugkraft zunimmt, wird das geklemmte Schleifblatt, unabhängig von seiner Stärke, d.h. dünne wie dicke Schleifbätter gleichermaßen sicher festgehalten. Durch das feste Klemmen des Schleifblatts ist das Spiel zwischen diesem und dem Schleifblattträger begrenzt. Damit wird die schwingende Schleifbewegung des Schleifblattträgers nahezu schlupffrei auf das Schleifblatt übertragen, so daß dieses besonders effektiv an einem Werkstück schleifend angreifen kann.The fact that the outer contour of the jaw with rising Radius of curvature is curved outwardly, in particular lying in the self-locking area, so that the clamping force proportional to a seeks to solve the sanding sheet Traction increases, the clamped abrasive sheet, regardless of its strength, i. thin and thick sanding sheets equally securely held. By the firm clamping The sanding sheet is the game between this and the Abrasive sheet carrier limited. This will be the swinging Grinding movement of the abrasive sheet carrier almost without slippage transferred to the abrasive sheet so that this is particularly effective can attack on a workpiece schleifend.

Dadurch, dass der Klemmbacken eine Außenkontur hat, deren größter Abstand zur Schwenkachse größer als der Abstand zwischen Schwenkachse und Oberseite des Schleifblattträgers ist und dadurch, dass der Klemmbacken zum Rand des Schleifblattträgers hin elastisch drehvorgespannt sich an einer Seite des Schleifblattträgers abstützt, stellt sich bei einfacher Ausgestaltung der Klemmmittel selbsttätig eine hohe Klemmkraft zwischen Klemmbacken und Oberseite des Schleifblattträgers ein, wobei ein Servoeffekt eintritt, der darin besteht, dass mit zunehmender Zugkraft am Schleifpapier entgegen der Einschubrichtung die Klemmkraft immer stärker wird. Dadurch ist das Schleifpapier bis zur Zerreissgrenze festklemmbar, ohne daß es sich selbsttätig lösen kann.The fact that the jaw has an outer contour whose largest distance to the pivot axis greater than the distance between Swivel axis and top of the abrasive sheet carrier is and in that the jaw to the edge of the abrasive sheet carrier Elastic torsionally biased on one side supported by the abrasive sheet carrier, turns out to be easier Design of the clamping means automatically a high clamping force between jaws and top of the abrasive sheet carrier a, wherein a servo effect occurs, which consists in that counteracts with increasing traction on the sandpaper the insertion direction, the clamping force is getting stronger. As a result, the sandpaper is up to the breaking point can be clamped without it being able to release itself.

Dadurch, dass der Klemmbacken zur Freigabe des eingespannten Schleifblatts mittels Drucktaste entgegen der Klemmrichtung bewegbar ist, ist das Lösen und Entnehmen des Schleifblatts von der Schleifhandwerkzeugmaschine besonders einfach.The fact that the jaws to release the clamped Sanding sheet by means of a pushbutton against the clamping direction is movable, is the loosening and removal of the sanding sheet from the grinding hand tool especially easy.

Dadurch, dass der Klemmbacken aus elastischem, gummiartigem Werkstoff besteht, wird der Servoeffekt zum zunehmenden Klemmen des Schleifblattes verstärkt.Because of the jaws of elastic, rubbery Material, the servo effect is increasing Clamping of the sanding sheet reinforced.

Der Servoeffekt wird außerdem dadurch verstärkt, dass die Klemmbackenaußenkontur säbelartig progressiv gekrümmt ist.The servo effect is also reinforced by the fact that the Jaw outer contour is saber-like progressively curved.

Ein weiterer Vorteil besteht darin, daß nach dem Klemmen des Schleifblatts dessen Spannung bwz. Straffung einfach durch Nachschieben in den Klemmschlitz erhöhbar ist, wobei die Klemmeinrichtung ein einmal eingeschobenes Schleifblattende auch bei großer Kraft entgegen der Einschubrichtung nicht wieder hergibt, außer es wird zuvor eine Lösetaste betätigt. Je weiter das Schleifblattende unter die Klemmbacke geschoben wird, umso größer ist die Klemmfläche und umso größer ist die Klemmung.Another advantage is that after the clamping of the Sanding sheet whose tension bwz. Streamline through Nachschieben in the clamping slot is increased, the Clamping device a once inserted abrasive sheet end even with great force against the insertion direction not returns unless a release button is pressed beforehand. The further the abrasive sheet end is pushed under the jaw becomes, the larger the clamping surface and the larger is the clamping.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der nachfolgenden Beschreibung anhand der Zeichnung näher erläutert. An embodiment of the invention is in the following Description explained with reference to the drawing.

Es zeigen

  • Fig. 1 eine schematische Seitenansicht der erfindungsgemäßen Schleifhandwerkzeugmaschine,
  • Fig. 2 eine Draufsicht von oben auf die Klemmittel der Schleifhandwerkzeugmaschine,
  • Fig. 3 die Einzelheit einer einzelnen Klemmbacke von oben,
  • Fig. 4 die säbelartige Außen- und Innenkontur der Klemmbacke Fig. 5 eine Draufsicht auf den Schleifblattträger
  • Fig. 6 eine Seitenansicht gemäß Fig. 5
  • Figuren 7 a, b, c bis 8 a, b die Seitenansicht der Klemmittel bei Einlegen bzw. Lösen des Schleifblatts und
  • Figur 9 eine Prinzipskizze einer mit Taste betätigbaren Klemmbacke der erfindungsgemäßen Schleifhandwerkzeugmaschine.
  • Show it
  • 1 is a schematic side view of the abrasive hand tool according to the invention,
  • 2 is a top plan view of the clamping means of the grinding hand tool,
  • 3 shows the detail of a single jaw from above,
  • 4 shows the saber-like outer and inner contour of the clamping jaw FIG. 5 shows a plan view of the grinding sheet carrier
  • 6 is a side view of FIG. 5th
  • Figures 7 a, b, c to 8 a, b, the side view of the clamping means when loading or loosening of the abrasive sheet and
  • Figure 9 is a schematic diagram of an operable with button jaw of the abrasive hand tool according to the invention.
  • Beschreibung des AusführuizgsbeispielsDescription of the Ausführuizgsbeispiels

    Fig. 1 zeigt eine schematische Seitenansicht der Schleifhandwerkzeugmaschine 10 mit einem rechteckigen Gehäuse 12, das zugleich als Griff zum Halten und Führen der Schleifhandwerkzeugmaschine 10 dient.Fig. 1 shows a schematic side view of the grinding hand tool 10 with a rectangular housing 12, at the same time as a handle for holding and guiding the grinding hand tool 10 serves.

    Ein im Gehäuse 12 angeordneter Motor 11 dient zum hin- und hergehenden Antrieb eines plattenartigen Schleifblattträgers 14, der an der Unterseite des Gehäuses 12 angeordnet ist. Der Schleifblattträger 14 trägt an seiner seiner als Arbeitsfläche dienenden Unterseite 15 ein Schleifblatt 16, das sich mit seiner Rückseite am Schleifblattträger 14 bzw. an dessen Schleifkissen 18 abstützt.An arranged in the housing 12 motor 11 is used for back and forth drive a plate-like abrasive sheet carrier 14, which is arranged on the underside of the housing 12. The abrasive sheet carrier 14 carries on his his as a work surface serving bottom 15 an abrasive sheet 16, the with his back on the abrasive sheet carrier 14 and at whose sanding pad 18 is supported.

    Auf der Oberseite 13 des Schleifblattträgers 14 sind auf gegenüberliegenden Seiten als zweiarmige Klemmhebel 20 ausgestaltete Klemmmittel angeordnet. Die Klemmhebel 20 haben oberhalb einer Schwenkachse 24 einen Pendelarm 21 und unterhalb einen Klemmbacken 22, der sich mit säbelförmig gekrümmter Außenkontur 27 an einer Rastfläche 23 auf der Oberseite 13 des Schleifblattträgers 14 abstützt. Die Schwenkachse 24 sitzt an einem Lagerbock 28 auf der Oberseite des Schleifblattträgers 14.On the upper side 13 of the abrasive sheet carrier 14 are on opposite Pages designed as two-armed clamping lever 20 Clamping means arranged. The clamping lever 20 have above a pivot axis 24 a pendulum arm 21 and below a jaw 22, which is curved with saber-shaped Outer contour 27 on a locking surface 23 on the top 13 of the abrasive sheet carrier 14 is supported. The pivot axis 24 sits on a bearing block 28 on the top of the abrasive sheet carrier 14th

    Zwischen der Oberseite jedes Pendelarms 21 und einem nicht näher bezeichneten Widerlager im Gehäuse 12 stützt sich eine Druckfeder 26 ab, die jeweils den Klemmhebel 20 nach außen zu schwenken sucht, den Klemmbacken 22 gegen die Rastfläche 23 drückt und damit das Schleifblattende 17, 19 festklemmt.Between the top of each pendulum arm 21 and not one closer abutment in the housing 12 is based on a Compression spring 26 from, each of the clamping lever 20 to the outside seeks to pivot, the jaws 22 against the locking surface 23 presses and thus the abrasive sheet end 17, 19 clamps.

    Außerdem trägt der Pendelarm 21 ein als Drucktaste 121 dienendes, abstehendes Winkelstück, mit dem er per Fingerdruck so schwenkbar ist - entgegen der Druckfeder 26 - daß sich der Klemmbacken 22 von der Rastfläche 23 abhebt, wobei sich der Spalt zwischen der Außenkontur 27 des Klemmbackens 22 und der Rastfläche 23 vergrößert und das Schleifblatt 16 ohne weiteres entnehmbar ist.In addition, the pendulum arm 21 carries a serving as a push button 121, protruding elbow, with which he finger pressure is so pivotable - against the compression spring 26 - that the jaws 22 lifts off from the locking surface 23, wherein the gap between the outer contour 27 of the jaw 22nd and the locking surface 23 increases and the abrasive sheet 16 without Another is removable.

    Dabei ist bei beiden Klemmhebeln 20 der Abstand 30 zwischen der Schwenkachse 24 und der Rastfläche 23 kleiner als der Abstand 31 zwischen der Schwenkachse 24 und dem äußersten Punkt der Außenkontur 27, so dass in der durch die Feder 26 vorgespannten Lage die Spannbacke 22 - bis an den Bereich der Selbsthemmung - zum Anschlag gegen die Rastfläche 23 auf der Oberseite 13 des Schleifblattträgers 14 kommt. Dadurch verstärkt sich Servoeffektartig die Klemmkraft am Schleifblatt 16 entgegen der Einschieberichtung bei entsprechenden Verschiebekräften, die das Schleifblatt 16 zu lösen versuchen.In this case, in both clamping levers 20, the distance 30 between the pivot axis 24 and the locking surface 23 smaller than that Distance 31 between the pivot axis 24 and the outermost Point of the outer contour 27, so that in the spring 26th biased position the jaw 22 - to the area the self-locking - to stop against the locking surface 23 the top 13 of the abrasive sheet carrier 14 comes. Thereby Servoeffectively increases the clamping force on the abrasive sheet 16 against the insertion direction at appropriate Displacement forces that try to solve the sanding sheet 16.

    Andererseits ist die Druckfeder 26 nur derart geringfügig vorgespannt, dass das Schleifblatt 16 von außen durch leichtes Andrücken an die Außenkontur 27 des Klemmbackens 22 diesen entgegen der Druckfeder 26 und entgegen der Spannrichtung verschiebt, sich den zum Einschieben nötigen Spalt selber schafft und leicht mit einer Hand ein- und nachschiebbar ist. Der Klemmbacken 22 hat zumindest eine äußere Schicht aus elastischem, gummiartigem Werkstoff mit hohem Reibwert, der eine Relativbewegung zwischen Schleifblatt 16 und Klemmbacke 22 weitgehend einschränkt.On the other hand, the compression spring 26 is only so slight biased that the abrasive sheet 16 from the outside by light Pressing against the outer contour 27 of the jaw 22 this against the compression spring 26 and against the clamping direction shifts, the necessary to insert the cleft itself creates and easily with one hand on and nachschiebbar is. The jaw 22 has at least one outer layer made of elastic, rubber-like material with high coefficient of friction, the one relative movement between the abrasive sheet 16 and jaw 22 largely restricts.

    Zum Bestücken der Handschleifmaschine 10 mit einem Schleifblatt 16 ist diese mit einer Hand am Gehäuse 12 festzuhalten. Mit der anderen Hand ist das eine Schleifblattende 17 zunächst am ersten Klemmhebel 20 in der beschriebenen Art einzuführen und zu arretierten. Sodann kann das zweite Schleifblattende 19 am anderen Klemmhebel 20 auf die gleiche Weise eingeführt und arretiert werden, wobei durch Streichen mit der Hand entlang dem Schleifblatt 16 dieses gestrafft und dessen Enden 17, 19 weiter zwischen die Klemmbacken 22 und die Rastflächen 23 eingeschoben werden können, ohne dass beim Loslassen die Enden wieder heraustreten und die Spannung des Schleifblatts 16 nachlassen. Dadurch ist mit verhältnismäßig geringem Aufwand ein straffes und festes Klemmen des Schleifblatts 16 am Kissen 18 bzw. am Schleifblattträger 14 möglich.To load the hand grinder 10 with an abrasive sheet 16 this is to be held on the housing 12 with one hand. With the other hand, this is a sanding sheet end 17 first on the first clamping lever 20 in the manner described introduce and locked. Then the second Abrasive blade end 19 on the other clamping lever 20 to the same Be introduced and arrested, whereby by swiping with the hand along the sanding sheet 16 this tightened and its ends 17, 19 further between the jaws 22nd and the locking surfaces 23 can be inserted without when you release the ends come out again and the tension of the sanding sheet 16. This is with proportionate little effort a tight and firm clamping of the sanding sheet 16 on the pad 18 or on the abrasive sheet carrier 14 possible.

    Figur 2 zeigt eine Draufsicht auf die Schleifhandwerkzeugmaschine 10 mit den Einzelheiten der Klemmmittel 20 und die Figuren 3 bis 6 die zuvor zu Figur 1 erläuterten Klemmmittel als Einzelheit.FIG. 2 shows a top view of the grinding hand tool 10 with the details of the clamping means 20 and the Figures 3 to 6 previously explained for Figure 1 clamping means as a detail.

    Fig. 7a zeigt die Bewegungsphase der Klemmmittel vor dem Einlegen, Fig. 7b beim Einlegen des Schleifblattendes 19 und Fig. 7c nach dem Einlegen in der Endposition des Schleifblatts bei entfalteter Klemmwirkung. Daraus ist ersichtlich, dass zum Einlegen des Schleifblatts 16 das Schleifblattende 19 nur seitlich leicht gegen die Außenkontur 27 des Klemmbackens 22 zu drücken ist, so daß sich zwischen dem Klemmbacken 22 und der Rastfläche 23 ein Spalt bildet, in das es eintritt. Der Klemmhebel 20 muß dabei nicht gesondert von Hand betätigt werden. Fig. 7a shows the movement phase of the clamping means before Insert, Fig. 7b when inserting the abrasive sheet end 19 and Fig. 7c after insertion in the end position of the sanding sheet at unfolded clamping effect. It can be seen from this for inserting the abrasive sheet 16, the abrasive sheet end 19 only slightly laterally against the outer contour 27 of the jaw 22 is to press, so that between the jaws 22 and the locking surface 23 forms a gap in which it entry. The clamping lever 20 does not have to be separated from Hand operated.

    Die Fig. 8a und b zeigen die Bewegungsphasen des Klemmhebels 20 bei der Entnahme des Schleifblatts 16, wobei der Klemmhebel 20 von Hand d.h. durch Fingerdruck auf die Taste 121 im Uhrzeigersinn um die Schwenkachse 24 zu bewegen ist. Dabei hebt sich die Klemmbacke 22 mit ihrer Außenkontur vom Schleifblatt 16 bzw. von der Rastfläche 23 derart ab, dass aus dem sich vergrößernden Spalt das Schleifblattende 17, 19 ohne weiteres herausgezogen werden kann und so das Schleifblatt 16 leicht lösbar ist.FIGS. 8a and b show the movement phases of the clamping lever 20 upon removal of the abrasive sheet 16, wherein the clamping lever 20 by hand i.e.. by pressing the button 121 in the Clockwise to move about the pivot axis 24 is. there the jaw 22 lifts with its outer contour of Abrasive sheet 16 or from the latching surface 23 in such a way that from the increasing gap, the abrasive sheet end 17, 19 can be easily pulled out and so the sanding sheet 16 is easily solvable.

    Figur 9 zeigt eine vergrößerte Darstellung eines Klemmmhebels 20, dessen Achse 24 an einem Lagerbock 228 auf dem Schleifblattträger 14 angeordnet ist. Der Klemmhebel 20 hat eine Klemmbacke 22, die gegenüber der Rastfläche 23 abstützbar ist, wobei eine am äußersten Ende des Pendelarms 21 angreifende Zugfeder 226 die Klemmbacke 22 zur Rastfläche 23 zu.ziehen sucht. Am äußersten Ende hat der Pendelarm 21 eine Gelenkpfanne 222, in die ein Gelenkzapfen 322 einer Taste 221 eingreift.Figure 9 shows an enlarged view of a clamping lever 20, whose axis 24 on a bearing block 228 on the Abrasive sheet carrier 14 is arranged. The clamping lever 20 has a clamping jaw 22, which can be supported relative to the latching surface 23 is, with a at the extreme end of the pendulum arm 21 attacking Tension spring 226, the jaw 22 to the locking surface 23rd looking for. At the extreme end of the pendulum arm 21 has a Articulated socket 222 into which a pivot pin 322 of a button 221 intervenes.

    Die Taste 221 ist um eine am Lagerbock 228 gehalterte Achse 224 in Richtung des Richtungspfeils 333 mittels Fingerdruck schwenkbar und kann damit den Klemmhebel 20 in seine geöffnete Position zur Entnahme eines geklemmten Schleifblatts bewegen. Zum Zurückstellen der Taste 221 in ihre Ausgangsposition ist eine Druckfeder 227 zwischen der Rückseite der Taste 221 und dem Gehäuse 12 der Schleifhandwerkzeugmaschine 10 angeordnet.The key 221 is an axis supported on the bearing block 228 224 in the direction of the directional arrow 333 by means of finger pressure pivotable and can thus the clamping lever 20 in its open Position for removing a clamped sanding sheet move. To reset the button 221 to its original position is a compression spring 227 between the back of Button 221 and the housing 12 of the grinding hand tool 10 arranged.

    Claims (8)

    1. Portable sander, in particular an orbital sander (10), having a plate-like abrasive sheet holder (14), on the working surface (15) of which an abrasive sheet (16) can be supported, it being possible for opposite abrasive sheet ends (17, 19) to be held in place on the abrasive sheet holder (14) by clamping means (20, 23) arranged thereon, a lever with a pivot axis (24) arranged on the abrasive sheet carrier (14) serving as clamping means (20, 23), this lever, at one end, having a clamping jaw (22) supported on the abrasive sheet holder (14), characterized in that the abrasive sheet (16), for fitting the portable sander (10) with said abrasive sheet, can be pushed in between the clamping jaw (22) and the abrasive sheet holder (14) against the elastic prestress of the clamping jaw (22), it being possible for the clamping jaw (22) to be opened only by contact with the abrasive sheet (16), in particular with one of the abrasive sheet ends (17, 19), which end, during movement against the push-in direction, can be locked automatically as a result of this movement.
    2. Portable sander according to Claim 1,
      characterized in that the clamping jaw (22) is pivotably mounted about an axis (24), and in that the outer contour of the clamping jaw (22) runs so as to be arched outwards starting from the axis (24), the radius of curvature becoming smaller towards the free end, so that the clamping force increases in proportion to a tensile force attempting to release the abrasive sheet (16) .
    3. Portable sander according to Claim 1, characterized in that the abrasive sheet (16) can be removed after prior deflection of the clamping jaw (22) against the clamping direction.
    4. Portable sander according to one of Claims 1 to 3, characterized in that the clamping jaw (22) has an outer contour whose greatest distance from the pivot axis (24) is greater than the distance between the pivot axis (24) and the top side of the abrasive sheet holder (14), and in that the clamping jaw (22) is supported on one side (13) of the abrasive sheet holder (14), in particular perpendicularly below the pivot axis (24), in such a way as to be rotationally prestressed elastically towards the margin of the abrasive sheet holder (14).
    5. Portable sander according to one of the preceding claims, characterized in that the clamping jaw (22), for releasing an abrasive sheet (16) clamped in place, can be moved into its release position against the clamping direction, in particular against a spring force, in particular by means of a pushbutton (121).
    6. Portable sander according to Claim 5,
      characterized in that the clamping jaw (22) is made at least partly of elastic, rubber-like material.
    7. Portable sander according to Claim 6, characterized in that a spring (26) is supported on the clamping means (20) and prestresses the latter.
    8. Portable sander according to Claim 7, characterized in that the clamping means (20, 23) is arranged on the top side of the abrasive sheet holder (14) and the abrasive sheet (16) can be supported on its underside.
    EP02742814A 2001-08-10 2002-06-27 Sanding hand machine tool Expired - Lifetime EP1419031B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE10139546A DE10139546A1 (en) 2001-08-10 2001-08-10 Grinding tool machine has plate-type holder, clamps as lever with clamping jaw, swivel axle
    DE10139546 2001-08-10
    PCT/DE2002/002345 WO2003015986A1 (en) 2001-08-10 2002-06-27 Sanding hand machine tool

    Publications (2)

    Publication Number Publication Date
    EP1419031A1 EP1419031A1 (en) 2004-05-19
    EP1419031B1 true EP1419031B1 (en) 2005-09-14

    Family

    ID=7695169

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP02742814A Expired - Lifetime EP1419031B1 (en) 2001-08-10 2002-06-27 Sanding hand machine tool

    Country Status (5)

    Country Link
    US (1) US6887143B2 (en)
    EP (1) EP1419031B1 (en)
    CN (1) CN1241715C (en)
    DE (2) DE10139546A1 (en)
    WO (1) WO2003015986A1 (en)

    Families Citing this family (12)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE10232055A1 (en) * 2002-07-16 2004-02-05 Robert Bosch Gmbh Mechanical grinding machine, especially vibrating grinder, has housing, grinding disc holder, clamps as tongs and jaws moving on axle
    DE10323640A1 (en) * 2003-05-26 2004-12-16 Robert Bosch Gmbh Sander machine
    US7112128B1 (en) * 2005-04-29 2006-09-26 3M Innovative Properties Company Sanding tool with protective clamping mechanism
    US7591715B2 (en) * 2005-08-11 2009-09-22 3M Innovative Properties Company Sanding tool with sheet loading feature
    US7134951B1 (en) * 2005-12-28 2006-11-14 Leon Jess M Sheet holder for abrasive sheets
    DE102006035977A1 (en) * 2006-08-02 2008-02-07 Robert Bosch Gmbh Grinding hand tool with new grinding blade tension
    EP2404701B1 (en) * 2010-07-05 2013-05-29 Techtronic Power Tools Technology Limited Sander
    CN102328280A (en) * 2011-10-11 2012-01-25 吴江市三达五金工具厂 Grinding tool
    DE102011084591A1 (en) 2011-10-17 2013-04-18 Robert Bosch Gmbh Machine tools fixture
    CN103170912A (en) * 2013-01-22 2013-06-26 熊根稳 Linear polishing machine
    CN108160876A (en) * 2017-12-26 2018-06-15 骆小艳 A kind of furniture processing wind spring mould
    CN111360710A (en) * 2020-04-22 2020-07-03 郑伟 Multifunctional grinding plate for model manufacturing of quickly clamping abrasive paper

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    US2735241A (en) * 1956-02-21 Rubbing machine
    US2242545A (en) * 1940-03-27 1941-05-20 Sundstrand Machine Tool Co Rubbing machine
    US2749679A (en) * 1953-11-25 1956-06-12 Nicholas T Anton Shoes for rubbing devices
    US2914889A (en) * 1955-07-28 1959-12-01 Sundstrand Corp Clamping device
    US3267622A (en) * 1964-06-19 1966-08-23 Rockwell Mfg Co Abrasive pad structure for portable sanding machine
    US4330964A (en) * 1980-04-14 1982-05-25 Evidio Martinez Sanding device
    IT1298433B1 (en) 1997-02-27 2000-01-10 Bosch Gmbh Robert PORTABLE ELECTRIC TOOL IN PARTICULAR GRINDER

    Also Published As

    Publication number Publication date
    EP1419031A1 (en) 2004-05-19
    CN1241715C (en) 2006-02-15
    DE10139546A1 (en) 2003-02-20
    WO2003015986A1 (en) 2003-02-27
    US6887143B2 (en) 2005-05-03
    CN1464813A (en) 2003-12-31
    US20040033767A1 (en) 2004-02-19
    DE50204285D1 (en) 2005-10-20

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