EP0479783B1 - Hand sander - Google Patents

Hand sander Download PDF

Info

Publication number
EP0479783B1
EP0479783B1 EP89911777A EP89911777A EP0479783B1 EP 0479783 B1 EP0479783 B1 EP 0479783B1 EP 89911777 A EP89911777 A EP 89911777A EP 89911777 A EP89911777 A EP 89911777A EP 0479783 B1 EP0479783 B1 EP 0479783B1
Authority
EP
European Patent Office
Prior art keywords
belt
sanding
roller
plate
hand
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
EP89911777A
Other languages
German (de)
French (fr)
Other versions
EP0479783A1 (en
Inventor
Heinz Walz
Peter Stierle
Albert RÜSS
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 EP0479783A1 publication Critical patent/EP0479783A1/en
Application granted granted Critical
Publication of EP0479783B1 publication Critical patent/EP0479783B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/06—Portable grinding machines, e.g. hand-guided; Accessories therefor with abrasive belts, e.g. with endless travelling belts; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/18—Accessories
    • B24B21/20—Accessories for controlling or adjusting the tracking or the tension of the grinding belt

Definitions

  • the invention relates to a hand belt grinding machine with the features of the preamble of claim 1.
  • a generic hand belt grinding machine with drive and deflection roller and with an automatic belt run centering is described in EP-A-0 007172.
  • a sensor with a lever system for pivoting the deflection roller is mounted on the housing of the known hand-held belt grinder. The storage is near the pulley.
  • Hand belt sanding machines have the peculiarity that the rotating sanding belt migrates laterally depending on the load and direction.
  • the belt run centering is intended to ensure the correct match of the center of the sanding belt to the center of the drive or.
  • Secure the pulley tread As soon as the sanding belt moves transversely to the direction of rotation, it hits the closely spaced sensor with a belt edge. The sensor acts on the pulley via the lever system. This is moved from its position parallel to the drive roller in such a way that the belt is again directed into the center of the roller circumference.
  • Hand belt sanding machines with the features of claim 1 have the advantage of a simple, robust and reliable construction with reduced wear both on the centering device and on the sanding belt.
  • the service life of the sanding belt is extended considerably.
  • the quality of work that can be achieved with hand-held belt grinders is improved. Interruptions to work due to the failure of the automatic belt centering and a subsequent manual adjustment are no longer necessary.
  • the features of the claims following claim 1 serve to advantageously develop the invention.
  • Particular advantages of the invention result from the compact, level lever arrangement of the tape centering without bearing on the housing with only a single pivot axis.
  • the invention solves the problem of creating a sensitive as well as robust belt run centering for a hand belt sanding machine with few, easy to manufacture and functionally reliable parts, by which an adjustment after changing the sanding belt is unnecessary.
  • FIG. 1 shows a View of a hand belt sander from below
  • Figure 2 is a side view
  • Figure 3 is a separate embodiment of the guide roller.
  • FIG. 1 shows a hand belt grinder 1 with a motor, not shown in detail.
  • the hand-held belt grinder 1 has a housing 2 which on the one hand receives an axis 3 with a drive roller 4 and on the other hand a guide plate 5.
  • a control plate 6 with a fork-shaped end for receiving an axis 7 of a deflection roller 8 is mounted on this.
  • the control plate 6 is pivotably held on the guide plate 5 via a pivot axis 9, or 10, which is designed as a joint.
  • the guide plate 5 is guided in guide grooves 11 of the housing 2 to be displaceable transversely to the axes 3, 7.
  • the control plate 6 ends on its side facing away from the fork-shaped end in a lever arm 12 shown - grinding plate 19 guided grinding belt 14 is positioned near the drive roller 4.
  • the start-up part 12 ′ is rotatably mounted around a clamping screw 15 with eccentric bolt 16 on the lever arm 12 and is adjustable relative to the open edge 13 via the eccentric bolt 16.
  • a compression spring 17 is supported on one side in the area of the guide grooves 11 on the housing 2 and on the other side in a step-shaped area of the guide plate 5.
  • a further compression spring 18 can be supported between the end of the guide plate 5 on the drive roller side and the lever arm 12.
  • the deflection roller 8 carries two O-rings 20 on its circumference off-center, on the side of the run-up part 12 '.
  • the side view of the hand-held belt grinding machine 1 shown in FIG. 2 illustrates the position of the lever arm 12 with the run-on part 12 'to the sanding belt 14 and the sanding plate 19.
  • the position of the guide plate 5 is at approximately half the height of the drive and deflection rollers 4, 8 and above them the position of the motor shown.
  • FIG. 3 shows a guide roller 28 which, on its circumference, instead of the two O-rings 20 according to FIG. 1, laterally carries a bead 40 which is molded into the roller material.
  • the belt centering and related processes on the hand belt sander 1 are described below:
  • the motor drives the drive roller 4. This transfers the rotary motion required for grinding to the grinding belt 14 and thus to the deflection roller 8, 28.
  • the hand belt grinding machine 1 With the side of the grinding plate 19, the hand belt grinding machine 1 is placed on a surface to be ground and held. The abrasive belt 14 sliding over this surface causes the surface to be removed.
  • the axes 3, 7 bind adjusted so that there is a defined, leftward, slight oversteering tendency of the grinding belt 14, so that the latter constantly oscillates slightly towards and away from the start-up part 12 '.
  • This tendency to oversteer can be varied by the dimensioning of the additional compression spring 18 or by the arrangement of the O-rings 20 or the bead 40 on the deflection roller 8 or 28 or by the alternative, off-center pivot axis 10. If the transverse movement of the grinding belt 14 is influenced by external influences, e.g. when cross-grinding with the hand belt grinding machine, stronger, the above-described restoring effect is also increased.
  • a transverse movement of the grinding belt in the viewing direction to the right is automatically compensated for due to the tendency to oversteer to the left.
  • the compression springs 17, 18 are means for tensioning the grinding belt 14, which is necessary for operation, and exert a force on the deflection roller 8 or 28 away from the drive roller 4.
  • the eccentric pin 16, with which the run-on part 12 'can be adjusted parallel to the axes 3, 7, allows the grinding belt 14 to be shifted to the right into a changed centering position, in particular in the viewing direction.
  • the sanding belt 14 projects with its outer edge 13 beyond the right outer edge of the hand belt sanding machine or the sanding plate 19. This enables a particularly precise and fine, flush finishing of stepped surfaces or fillets.

Landscapes

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

Abstract

The proposal, in a hand sander (1) with a housing (2) containing a motor and in which are rotatably arranged a drive roller (4) and a guide roller (8) at a distance from the drive roller, with an axis substantially parallel thereto but movable out of the parallel-axis layout, over which and over a sanding plate (19) is led an endless sanding belt (14), where a guide plate (5) inside the housing (2) carries a control plate (6) with a forked end to take the guide roller (8, 28) and is arranged so as to move therewith and on which at least one spring (17) supported on the housing (2) bears, with a probe (12) detecting the position of the outer edge (13) of the sanding belt (14) by means of a contact component (12') and arranged to pivot about an axis (9) perpendicular to the guide plate (5) which affects the position of the sanding belt (14), is for the pivot axis (9) to be in the guide plate (5), the control plate (6) to pivot about the axis (9) and to bear the contact component (12') in the form of a contact roller on a one-piece lever arm (12) pointing towards the drive roller (4). This provides simplified construction and the improved centring of the sanding belt (14).

Description

Die Erfindung betrifft eine Handbandschleifmaschine mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a hand belt grinding machine with the features of the preamble of claim 1.

Eine gattungsgleiche Handbandschleifmaschine mit Antriebs- und Umlenkrolle und mit einer automatischen Bandlaufzentrierung ist in der EP-A-0 007172 beschrieben. Am Gehäuse der bekannten Handbandschleifmaschine ist ein Fühler mit Hebelsystem zum Schwenken der Umlenkrolle gelagert. Die Lagerung befindet sich nahe der Umlenkrolle.A generic hand belt grinding machine with drive and deflection roller and with an automatic belt run centering is described in EP-A-0 007172. A sensor with a lever system for pivoting the deflection roller is mounted on the housing of the known hand-held belt grinder. The storage is near the pulley.

Handbandschleifmaschinen haben die Eigenart, daß das umlaufende Schleifband abhängig von Beanspruchungskraft und -richtung seitlich auswandert. Die Bandlaufzentrierung ist dafür vorgesehen, die korrekte Übereinstimmung der Schleifbandmitte zur Mitte der Antriebs-bzw. Umlenkrollenlauffläche zu sichern. Sobald sich das Schleifband quer zur Umlaufrichtung bewegt, trifft es mit einer Bandkante auf den nah beabstandeten Fühler. Der Fühler wirkt über das Hebelsystem auf die Umlenkrolle. Diese wird derart aus ihrer zur Antriebsrolle achsparallelen Lage bewegt, daß das Band wieder in die Mitte des Rollenumfangs gelenkt wird.Hand belt sanding machines have the peculiarity that the rotating sanding belt migrates laterally depending on the load and direction. The belt run centering is intended to ensure the correct match of the center of the sanding belt to the center of the drive or. Secure the pulley tread. As soon as the sanding belt moves transversely to the direction of rotation, it hits the closely spaced sensor with a belt edge. The sensor acts on the pulley via the lever system. This is moved from its position parallel to the drive roller in such a way that the belt is again directed into the center of the roller circumference.

Nachteile der bekannten Bandlaufzentrierung sind deren aufwendige, vielgelenkige Konstruktion mit Störanfälligkeit gegen Schwingungen und Verschmutzung sowie der hohe Verschleiß sowohl am Hebelsystem zur Bandlaufzentrierung als auch an dem zu zentrierenden Schleifband. Ein weiterer Nachteil ist das notwendige Justieren der bekannten Bandlaufzentrierung je nach z.B. abnutzungsbedingter Längung des Schleifbandes oder infolge von Längendifferenzen unterschiedlicher Schleifbänder beim Wechseln.Disadvantages of the known belt run centering are their complex, multi-articulated construction with susceptibility to vibrations and contamination as well as the high wear both on the lever system for belt run centering and on the grinding belt to be centered. Another disadvantage is the necessary adjustment of the known tape centering depending on e.g. wear-related elongation of the sanding belt or due to differences in length of different sanding belts when changing.

Vorteile der ErfindungAdvantages of the invention

Handbandschleifmaschinen mit den Merkmalen des Anspruchs 1 haben den Vorteil einer einfachen, robusten und funktionssicheren Konstruktion mit vermindertem Verschleiß sowohl an der Zentriereinrichtung als auch am Schleifband. Die Standzeit des Schleifbandes wird erheblich verlängert. Die mit Handbandschleifmaschinen erreichbare Arbeitsqualität wird verbessert. Arbeitsunterbrechungen infolge Versagens der automatischen Bandlaufzentrierung sowie eine daraufhin notwendige Justierung von Hand entfallen. Die Merkmale der dem Anspruch 1 folgenden Ansprüche dienen der vorteilhaften Ausgestaltung der Erfindung. Besondere Vorteile der Erfindung ergeben sich durch die kompakte, ebene Hebelanordnung der Bandlaufzentrierung ohne Lagerung am Gehäuse mit nur einer einzigen Schwenkachse. Die Erfindung löst die Aufgabe, eine ebenso feinfühlige wie robuste Bandlaufzentrierung für eine Handbandschleifmaschine mit wenigen, einfach herstellbaren und funktionssicheren Teilen zu schaffen, durch die sich eine Justierung nach dem Schleifbandwechsel erübrigt.Hand belt sanding machines with the features of claim 1 have the advantage of a simple, robust and reliable construction with reduced wear both on the centering device and on the sanding belt. The service life of the sanding belt is extended considerably. The quality of work that can be achieved with hand-held belt grinders is improved. Interruptions to work due to the failure of the automatic belt centering and a subsequent manual adjustment are no longer necessary. The features of the claims following claim 1 serve to advantageously develop the invention. Particular advantages of the invention result from the compact, level lever arrangement of the tape centering without bearing on the housing with only a single pivot axis. The invention solves the problem of creating a sensitive as well as robust belt run centering for a hand belt sanding machine with few, easy to manufacture and functionally reliable parts, by which an adjustment after changing the sanding belt is unnecessary.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind nachstehend in der Beschreibung mit zugehöriger Zeichnung erläutert. Es zeigen die Figur 1 eine Ansicht einer Handbandschleifmaschine von unten, die Figur 2 deren Seitenansicht und die Figur 3 ein gesondertes Ausführungsbeispiel der Umlenkrolle.Exemplary embodiments of the invention are explained below in the description with the associated drawing. 1 shows a View of a hand belt sander from below, Figure 2 is a side view and Figure 3 is a separate embodiment of the guide roller.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Figur 1 zeigt eine Handbandschleifmaschine 1 mit nicht im einzelnen dargestelltem Motor. Die Handbandschleifmaschine 1 hat ein Gehäuse 2, das einerseits eine Achse 3 mit einer Antriebsrolle 4, sowie andererseits ein Führungsblech 5 aufnimmt. Auf diesem ist ein Steuerblech 6 mit einem gabelförmigen Ende zur Aufnahme einer Achse 7 einer Umlenkrolle 8 gelagert. Das Steuerblech 6 ist über eine als Gelenk ausgebildete Schwenkachse 9 - oder wahlweise 10 - schwenkbar am Führungsblech 5 gehalten. Das Führungsblech 5 ist in Führungsnuten 11 des Gehäuses 2 quer zu den Achsen 3, 7 verschiebbar geführt.Figure 1 shows a hand belt grinder 1 with a motor, not shown in detail. The hand-held belt grinder 1 has a housing 2 which on the one hand receives an axis 3 with a drive roller 4 and on the other hand a guide plate 5. A control plate 6 with a fork-shaped end for receiving an axis 7 of a deflection roller 8 is mounted on this. The control plate 6 is pivotably held on the guide plate 5 via a pivot axis 9, or 10, which is designed as a joint. The guide plate 5 is guided in guide grooves 11 of the housing 2 to be displaceable transversely to the axes 3, 7.

Das Steuerblech 6 endet an seiner dem gabelförmigen Ende abgewandten Seite in einem Hebelarm 12. Dieser trägt ein Anlaufteil 12' in Form einer Anlaufrolle, die unmittelbar benachbart zur vorgesehen Bewegungsbahn einer Außenkante 13 eines auf Antriebsrolle 4 und Umlenkrolle 8 sowie über eine - in Figur 2 gezeigte - Schleifplatte 19 geführten Schleifbandes 14 nahe der Antriebsrolle 4 positioniert ist. Um eine Klemmschraube 15 mit Exzenterbolzen 16 am Hebelarm 12 ist das Anlaufteil 12' drehbar gelagert und über den Exzenterbolzen 16 relativ zur Auffenkante 13 verstellbar. Eine Druckfeder 17 ist auf der einen Seite im Bereich der Führungsnuten 11 am Gehäuse 2 und auf der anderen Seitein einem stufenförmigen Bereich des Führungsblechs 5 abgestützt. Zusätzlich zur Druckfeder 17 kann eine weitere Druckfeder 18 zwischen dem antriebsrollenseitigen Ende des Führungsblechs 5 und dem Hebelarm 12 abgestützt sein. Die Umlenkrolle 8 trägt außermittig, auf der Seite des Anlaufteils 12', auf ihrem Umfang zwei O-Ringe 20.The control plate 6 ends on its side facing away from the fork-shaped end in a lever arm 12 shown - grinding plate 19 guided grinding belt 14 is positioned near the drive roller 4. The start-up part 12 ′ is rotatably mounted around a clamping screw 15 with eccentric bolt 16 on the lever arm 12 and is adjustable relative to the open edge 13 via the eccentric bolt 16. A compression spring 17 is supported on one side in the area of the guide grooves 11 on the housing 2 and on the other side in a step-shaped area of the guide plate 5. In addition to the compression spring 17, a further compression spring 18 can be supported between the end of the guide plate 5 on the drive roller side and the lever arm 12. The deflection roller 8 carries two O-rings 20 on its circumference off-center, on the side of the run-up part 12 '.

Die in Figur 2 gezeigte Seitenansicht der Handbandschleifmaschine 1 verdeutlicht die Position des Hebelarms 12 mit dem Anlaufteil 12' zum Schleifband 14 und der Schleifplatte 19. Außerdem ist die Position des Führungsblechs 5 auf etwa halber Höhe der Antriebs- und Umlenkrollen 4, 8 und oberhalb dieser die Position des Motors gezeigt.The side view of the hand-held belt grinding machine 1 shown in FIG. 2 illustrates the position of the lever arm 12 with the run-on part 12 'to the sanding belt 14 and the sanding plate 19. In addition, the position of the guide plate 5 is at approximately half the height of the drive and deflection rollers 4, 8 and above them the position of the motor shown.

Das Ausführungsbeispiel in Figur 3 zeigt eine Führungsrolle 28, die auf ihrem Umfang, anstelle der zwei O-ringe 20 gemäß Figur 1, seitlich einen Wulst 40 trägt, der in den Rollenwerkstoff eingeformt ist.The exemplary embodiment in FIG. 3 shows a guide roller 28 which, on its circumference, instead of the two O-rings 20 according to FIG. 1, laterally carries a bead 40 which is molded into the roller material.

Die Bandlaufzentrierung und damit zusammenhängende Abläufe an der Handbandschleifmaschine 1 sind nachfolgend beschrieben:
Der Motor treibt die Antriebsrolle 4 an. Diese überträgt die für das Schleifen erforderliche, umlaufende Bewegung auf das Schleifband 14 und damit auf die Umlenkrolle 8, 28. Mit der Seite der Schleifplatte 19 wird die Handbandschleifmaschine 1 auf eine zu schleifende Fläche gesetzt und festgehalten. Das über diese Fläche gleitende Schleifband 14 bewirkt den Oberflächenabtrag.The belt centering and related processes on the hand belt sander 1 are described below:
The motor drives the drive roller 4. This transfers the rotary motion required for grinding to the grinding belt 14 and thus to the deflection roller 8, 28. With the side of the grinding plate 19, the hand belt grinding machine 1 is placed on a surface to be ground and held. The abrasive belt 14 sliding over this surface causes the surface to be removed.

Bei Querbewegungen der Handbandschleifmaschine 1 beim Schleifen kann es geschehen, daß das Schleifband 14 in Betrachtungsrichtung beispielsweise nach links auf den Rollen 4, 8 bzw. 28 querläuft. Dabei trifft die linke Außenkante 13 auf das Anlaufteil 12' des Hebelarms 12 und bewegt diesen nach links. Diese Linksbewegung bewirkt eine gleichsinnige Bewegung des Steuerblechs 6 um die Schwenkachse 9 bzw. 10. Das gabelförmige Ende des Steuerblechs 6 schwenkt mit der Umlenkrolle 8, 28 infolge dieser Bewegung nach rechts um die Schwenkachse 9 bzw. 10. Damit wird mit der Umlenkrolle 8 bzw. 28 das Schleifband 14 entgegen seiner Querbewegung nach rechts geführt. Sobald das Schleifband 14 seine korrigierte Position einnimmt, ist das Anlaufteil 12' entlastet. Infolgedessen schwenkt der Hebelarm 12 mit dem Steuerblech 6 um die Schwenkachse 9 bzw. 10 nach rechts und damit das gabelförmige Ende des Steuerblechs 6 um die Schwenkachse 9 bzw. 10 nach links in die Ausgangsposition zurück.With transverse movements of the hand belt grinding machine 1 during grinding, it can happen that the grinding belt 14 runs in the viewing direction, for example to the left on the rollers 4, 8 or 28. The left outer edge 13 meets the run-up part 12 'of the lever arm 12 and moves it to the left. This left movement causes a movement of the control plate 6 in the same direction about the pivot axis 9 or 10. The fork-shaped end of the control plate 6 pivots with the deflection roller 8, 28 as a result of this movement to the right about the pivot axis 9 or 10 28 the grinding belt 14 is guided against its transverse movement to the right. As soon as the grinding belt 14 assumes its corrected position, the start-up part 12 'is relieved. As a result, the lever arm 12 pivots with the control plate 6 about the pivot axis 9 or 10 to the right and thus the fork-shaped end of the Control plate 6 about the pivot axis 9 or 10 to the left in the starting position.

Die Achsen 3, 7 bind so justiert, daß eine definierte, nach links gerichtete, geringe Übersteuerungstendenz des Schleifbandes 14 besteht, so daß dieses ständig geringfügig zum Anlaufteil 12' hin und von diesem weg querpendelt. Diese Übersteuerungstendenz ist durch die Dimensionierung der zusätzlichen Druckfeder 18 oder durch die Anordnung der O-Ringe 20 bzw. des Wulstes 40 an der Umlenkrolle 8 bzw. 28 oder durch die alternative, außermittige Schwenkachse 10 variierbar. Wird die Querbewegung des Schleifbandes 14 durch äußeren Einfluß, z.B. beim Querschleifen mit der Handbandschleifmaschine, stärker, verstärkt sich auch die vorbeschriebene Rückstellwirkung.The axes 3, 7 bind adjusted so that there is a defined, leftward, slight oversteering tendency of the grinding belt 14, so that the latter constantly oscillates slightly towards and away from the start-up part 12 '. This tendency to oversteer can be varied by the dimensioning of the additional compression spring 18 or by the arrangement of the O-rings 20 or the bead 40 on the deflection roller 8 or 28 or by the alternative, off-center pivot axis 10. If the transverse movement of the grinding belt 14 is influenced by external influences, e.g. when cross-grinding with the hand belt grinding machine, stronger, the above-described restoring effect is also increased.

Eine Querbewegung des Schleifbandes in Betrachtungsrichtung nach rechts wird infolge der Übersteuerungstendenz nach links selbsttätig ausgeglichen.A transverse movement of the grinding belt in the viewing direction to the right is automatically compensated for due to the tendency to oversteer to the left.

Die Druckfedern 17, 18 sind Mittel zum betriebsnotwendigen Spannen des Schleifbandes 14 und bewirken eine Kraftbeaufschlagung der Umlenkrolle 8 bzw. 28 weg von der Antriebsrolle 4.The compression springs 17, 18 are means for tensioning the grinding belt 14, which is necessary for operation, and exert a force on the deflection roller 8 or 28 away from the drive roller 4.

Der Exzenterbolzen 16, mit dem das Anlaufteil 12' parallel zu den Achsen 3, 7 verstellbar ist, erlaubt es, das Schleifband 14 in eine geänderte Zentrierlage, insbesondere in Betrachtungsrichtung nach rechts zu verschieben. Dadurch ragt das Schleifband 14 mit seiner Außenkante 13 über die rechte Außenkante der Handbandschleifmaschine bzw. der Schleifplatte 19 hinaus. Dies ermöglicht ein besonders exaktes und feines, bündig abschließendes Schleifen stufiger Flächen bzw. Hohlkehlen.The eccentric pin 16, with which the run-on part 12 'can be adjusted parallel to the axes 3, 7, allows the grinding belt 14 to be shifted to the right into a changed centering position, in particular in the viewing direction. As a result, the sanding belt 14 projects with its outer edge 13 beyond the right outer edge of the hand belt sanding machine or the sanding plate 19. This enables a particularly precise and fine, flush finishing of stepped surfaces or fillets.

Einen besonders schnell ansprechenden Regelmodus bewirkt die eng benachbarte Position des Anlaufteils 12' zur Antriebsrolle 4 nahe der Schleifplatte 19, weil die Querverschiebung des Schleifbandes 14 zuerst in diesem Bereich beginnt. Die Trägheit des Regelkreises ist damit deutlich verringert, weil bereits beim Entstehen der Querverschiebung diese sich selbst zurücksteuert.The closely adjacent position of the run-up part 12 'to the drive roller 4 near the sanding plate 19 results in a particularly quickly responding control mode, because the transverse displacement of the sanding belt 14 begins first in this area. The inertia of the control loop is thus significantly reduced, because the transverse displacement already controls itself when the transverse displacement occurs.

Claims (4)

  1. Hand belt sander (1) having a housing (2) receiving a motor, on which housing there are rotatably mounted, on the one hand, a drive roller (4) and, on the other hand, disposed at a distance therefrom on an essentially parallel axis but so as to be movable out of the parallel-axis arrangement, a deflection roller (8, 28), over which and over a sanding plate (19) there is guided, in revolving motion, a continuous sanding belt (14), a guide plate (5), disposed essentially parallel to the sanding plate (19) within the housing (2), supporting a control plate (6) having a forked end for the reception of the deflection roller (8, 28) and being disposed displaceably with the said deflection roller and being acted upon by at least one spring (17), and having a lever arm (12), which scans the position of the sanding belt (14) at its outer edge (13) by means of a butting part (12') and is mounted pivotably about a swivel axle (9, 10) running perpendicularly to the guide plate (5) and acts upon the position of the sanding belt (14), characterised in that the swivel axle (9, 10) is seated in the guide plate (5), in that the control plate (6) can be swivelled jointly with the forked end about the swivel axle (9, 10), forms the lever arm (12) in a one-piece extension pointing towards the drive roller (4) and supports the butting part (12') shaped particularly as a butting roller.
  2. Hand belt sander according to Claim 1, characterised in that the butting part (12') is disposed on the outer edge (13) of the sanding belt (14) closely adjacent to the drive roller (4) and the sanding plate (19).
  3. Hand belt sander according to Claim 2, characterised in that the deflection roller (8, 28) supports on its periphery, on the side of the lever arm (12), at least one O-ring (20).
  4. Hand belt sander according to Claim 2, characterised in that the deflection roller (28) supports on its periphery, on the side of the lever arm (12), a circumferential, formed-in bead (40).
EP89911777A 1989-06-27 1989-10-26 Hand sander Expired - Lifetime EP0479783B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3921003 1989-06-27
DE3921003A DE3921003A1 (en) 1989-06-27 1989-06-27 HANDBAND GRINDING MACHINE

Publications (2)

Publication Number Publication Date
EP0479783A1 EP0479783A1 (en) 1992-04-15
EP0479783B1 true EP0479783B1 (en) 1993-08-11

Family

ID=6383669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89911777A Expired - Lifetime EP0479783B1 (en) 1989-06-27 1989-10-26 Hand sander

Country Status (5)

Country Link
US (1) US5319887A (en)
EP (1) EP0479783B1 (en)
JP (1) JPH04506035A (en)
DE (2) DE3921003A1 (en)
WO (1) WO1991000163A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10314695A1 (en) * 2003-03-28 2004-10-07 C. & E. Fein Gmbh Belt sander has guide projection extended along length of sanding belt to engage into guide groove formed around cylinder, aligning sanding belt
US7837537B2 (en) 2005-03-24 2010-11-23 Black & Decker Inc. Belt sander
US7997962B2 (en) 2005-03-24 2011-08-16 Black & Decker Inc. Belt sander

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6468649B1 (en) 1995-02-22 2002-10-22 Scimed Life Systems, Inc. Antimicrobial adhesion surface
US6558798B2 (en) 1995-02-22 2003-05-06 Scimed Life Systems, Inc. Hydrophilic coating and substrates coated therewith having enhanced durability and lubricity
US5702754A (en) * 1995-02-22 1997-12-30 Meadox Medicals, Inc. Method of providing a substrate with a hydrophilic coating and substrates, particularly medical devices, provided with such coatings
JP3439009B2 (en) * 1995-12-06 2003-08-25 株式会社マキタ Belt sander
US7410412B2 (en) * 2005-01-21 2008-08-12 Black & Decker Inc. Belt sander
CN104526510A (en) * 2014-12-18 2015-04-22 谭新锋 Front-back reciprocating swing type sanding mechanism
TWI727908B (en) * 2020-11-03 2021-05-11 大里興業股份有限公司 Hand-held abrasive belt grinding machine with improved structure
CN112476182B (en) * 2020-11-26 2023-12-01 湖北永吉智能家居有限公司 Micro-airflow abrasive belt position detection device of broadband sander and control method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602436C (en) * 1932-06-16 1934-09-08 C F Scheer & Cie G M B H Belt grinder
FR945719A (en) * 1947-04-11 1949-05-12 Straight belt sander
US4177609A (en) * 1978-07-12 1979-12-11 Skil Corporation Automatic belt centering device
AU578019B2 (en) * 1983-04-26 1988-10-13 Skil Nederland B.V. Portable belt sander
NL8301475A (en) * 1983-04-26 1984-11-16 Skil Nederland Nv SANDING EQUIPMENT.
FR2566307B1 (en) * 1984-06-21 1986-10-31 Peugeot Outillage Elect AUTOMATIC BELT CENTERING DEVICE, PARTICULARLY FOR ABRASIVE BELT SANDER
DE3844359C2 (en) * 1988-12-30 1998-07-09 Bosch Gmbh Robert Belt sander

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10314695A1 (en) * 2003-03-28 2004-10-07 C. & E. Fein Gmbh Belt sander has guide projection extended along length of sanding belt to engage into guide groove formed around cylinder, aligning sanding belt
DE10314695B4 (en) * 2003-03-28 2013-10-10 C. & E. Fein Gmbh Belt sander
US7837537B2 (en) 2005-03-24 2010-11-23 Black & Decker Inc. Belt sander
US7846011B2 (en) 2005-03-24 2010-12-07 Black & Decker Inc. Belt sander
US7871311B2 (en) 2005-03-24 2011-01-18 Black & Decker Inc. Belt sander
US7997962B2 (en) 2005-03-24 2011-08-16 Black & Decker Inc. Belt sander

Also Published As

Publication number Publication date
JPH04506035A (en) 1992-10-22
WO1991000163A1 (en) 1991-01-10
EP0479783A1 (en) 1992-04-15
DE3921003A1 (en) 1991-01-03
US5319887A (en) 1994-06-14
DE58905295D1 (en) 1993-09-16

Similar Documents

Publication Publication Date Title
DE4226708C2 (en) Belt grinder
EP1386694B2 (en) Method of polishing and polishing machine
DE19739265B4 (en) Device for double-sided grinding of flat, disk-shaped workpieces
EP0479783B1 (en) Hand sander
DE4116568C2 (en) Method and device for simultaneous grinding of crank pin bearings on a crank shaft
EP1990133B1 (en) Grinder as tool for a processing device
DE2722021C2 (en) Internal grinding or polishing machine with a center displacement device for the tool
DE2609199A1 (en) MACHINE FOR GRINDING EDGE AREAS OF MOLDED PARTS
DE69103209T2 (en) Method and processing device, in particular for use in grinding wooden workpieces on a grinding machine.
DE19825698B4 (en) belt sander
EP2047948A2 (en) Device for grinding workpieces
DE69012137T2 (en) KNIFE SHARPENING MACHINE.
DE1658304B2 (en) MACHINE FOR GRINDING THE WELD BURD OF BUTT WELDED, NON-INSTALLED RAILS
DE202009004809U1 (en) Pipe grinding machine with adjustable side guide of the sanding belt
DE2527643C2 (en) Machine for grinding concave workpieces
DE19821982A1 (en) Belt grinder with belt rollers uses two closely adjacent belts individually tensioned by half-rollers and addressed to the work separately for dissimilar grit action.
DE19905139A1 (en) Device for fine machining of essentially cylindrical workpiece surfaces
DE3639264C2 (en) Device for copy grinding and smoothing cylindrical and spherical surfaces
DE2335575B2 (en)
DE3844359A1 (en) Belt grinder
DE3844360C1 (en) Portable belt-grinding machine
DE3844358A1 (en) Belt grinder
DE4311534A1 (en) Belt grinding unit
DE102009025784A1 (en) Pipe drilling machine, has clamping roller rotated around clamping roller axis and movably supported at clamping roller frame at side such that roller is aligned along running direction of drilling band at different angular positions
EP0625407B1 (en) Grinding machine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19911112

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI NL

17Q First examination report despatched

Effective date: 19921102

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI NL

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930816

REF Corresponds to:

Ref document number: 58905295

Country of ref document: DE

Date of ref document: 19930916

ET Fr: translation filed
ITF It: translation for a ep patent filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19941028

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19941031

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19960501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960628

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19960501

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20021024

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031031

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031031

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051026

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20061024

Year of fee payment: 18

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20071026

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071026

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20081222

Year of fee payment: 20