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EP2108491A1 - Circular saw protective cover - Google Patents

Circular saw protective cover Download PDF

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Publication number
EP2108491A1
EP2108491A1 EP08103438A EP08103438A EP2108491A1 EP 2108491 A1 EP2108491 A1 EP 2108491A1 EP 08103438 A EP08103438 A EP 08103438A EP 08103438 A EP08103438 A EP 08103438A EP 2108491 A1 EP2108491 A1 EP 2108491A1
Authority
EP
European Patent Office
Prior art keywords
protective hood
inlet
inlet part
pivot axis
protective
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08103438A
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German (de)
French (fr)
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EP2108491B1 (en
EP2108491B8 (en
Inventor
Herbert Schlüssel
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SUVA
Original Assignee
Suva Leistungscenter Sicherheitsprodukte
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.)
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Publication date
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Priority to EP20080103438 priority Critical patent/EP2108491B8/en
Publication of EP2108491A1 publication Critical patent/EP2108491A1/en
Publication of EP2108491B1 publication Critical patent/EP2108491B1/en
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Publication of EP2108491B8 publication Critical patent/EP2108491B8/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws

Definitions

  • the invention relates to a protective cover for covering the rotating saw blade of a table saw according to the preamble of patent claim 1.
  • a protective hood of this kind is known from DE-U 90 04 162 the applicant.
  • This guard has been proven to a great extent, not least because of its simple construction and its reliable function. This is due to the fact that the protective hood in its rest position always rests with its lower edge on the table of the circular saw and is raised only when feeding a workpiece to be sawn in that it abuts against the upwardly inclined inlet edge, so that the protective hood in an oblique Inlet position tilts. Upon further advancement of the workpiece, the protective cover is raised to a position in which the lower edge lies parallel to the table at a distance corresponding to the workpiece thickness.
  • the invention has for its object to provide a protective cover for circular saw available, which ensures a gentle lifting to the workpiece height and in which the displacement is as short as possible along the inlet edge.
  • this object is achieved in that the inlet end is formed as a separate inlet part, which is freely rotatably mounted on the protective hood about a pivot axis.
  • the pivot axis of the inlet part is at the same time the pivot axis of the protective hood, wherein advantageously the inlet part is designed as a circular segment with the center on the pivot axis.
  • the inlet part is shorter compared to an inlet end of the prior art with a fixed, straight upwardly inclined inlet edge, which on the one hand reduces the running-in phase and on the other hand improves the view of the interface.
  • FIGS. 4 to 9 is a table 10 to recognize a circular saw, the rotatably driven saw blade 12 projects through a gap 14 above the table 10 upwards.
  • a protective cover 16 which according to the FIGS. 1 to 3 consists of parallel walls 18 which are interconnected via an upper spacer bar 20; the spacer bar 20 merges into an inclined front wall 22 inclined towards the table 10, the lower end of which has an incision 24 open towards the table 10.
  • a suction nozzle 68 is attached for the connection of a suction line, which can be connected to a dust extraction device.
  • the protective hood 16 is freely pivotably mounted on a horizontal pivot axis 26 between two mutually parallel legs 28 of a support arm 30, so that they are in their in FIG. 4 shown rest position with its lower, straight edge 32 rests on the table 10 and thereby covers the saw blade 12.
  • the support arm 30 is freely pivotably mounted with its rear end, which is opposite to the pivot axis 26, via a parallel to this bearing axis 34 on a riving knife 36, which has a slot 38 to its attachment below the table 10 in the lower area.
  • a clamping lever 40 serves to remove the support arm 30 with the protective cover 16 quickly and easily from the splitting wedge 36 or to assemble it.
  • the front wall 22 of the protective hood 16 lies in the region of its inlet end 42 (cf. FIG. 4 ) against which a workpiece 44 to be sawn, such as a board or strip, is supplied.
  • this inlet end 42 is formed as an inlet part 46 which is freely rotatably mounted on the protective hood 16 about a pivot axis; This pivot axis is preferably at the same time the pivot axis 26 of the protective cover 16th
  • the inlet part 46 is, as the illustrated embodiment, preferably formed as a circular segment, the center of which lies on the pivot axis 26.
  • the inlet end 42 of the protective hood 16 is also, as in FIG. 2 to recognize, as upwardly inclined inlet edge 48 is formed, which has the shape of a circular sector with the same radius as the circular segment of the inlet part 46.
  • the inlet part 46 consists of two parallel circular segment-shaped walls 50 which surround the inlet end 42 of the protective cover 16 and how these consist of transparent plastic.
  • the two walls 50 of the inlet part 46 are connected by a front wall 52, which the front wall 22 of the protective cover 16 is opposite (see. FIG. 2 ).
  • a window 54 is installed, which improves the view of the interface and connects to the down a slot-shaped opening 56.
  • the pivot angle of the inlet part 46 about the pivot axis 26 is limited by stop elements consisting of a circular arc slot 58 in at least one wall 50 of the inlet part 46 and a pin 60 engaging therein, which protrudes from the opposite side of the front wall 22 of the protective cover 16; the radius center of the circular arc-shaped slot 58 lies on the pivot axis 26.
  • FIGS. 4 to 9 results in the operation of the inventively designed protective cover 16 with its inlet part 46.
  • This is located in the in FIGS. 1 and 4 shown rest position in its most upwardly pivoted starting position, in which the lower end of the circular arc-shaped slot 58 rests against the pin 60.
  • the inlet part 46 is held by a return spring 62, for example a leaf spring, which is fastened by means of a screw 64 on the spacer bar 20 and the free end presses against the front wall 52 of the inlet part 46.
  • a return spring 62 for example a leaf spring
  • FIG. 2 is an intermediate position hinted while FIG. 3 shows the end position in which the upper end of the circular arc-shaped slot 58 comes to rest on the pin 60.
  • the predetermined by the arcuate slot 58 pivot angle of the inlet part 46 can be limited, for example by an adjustable closure element, whereby the inlet part 46 in the in FIG. 1 shown starting position is already pivoted by a small angle against the protective cover 16. In this initial position, the inlet part 46 is already closer to the saw blade 12. This is particularly favorable for thin workpieces 44 and thus for small cutting heights to improve the view of the interface.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

Protective sleeve comprises a special intake part which freely pivots on the sleeve. Preferred Features: The pivoting axis of the intake part is the same as the pivoting axis of the protective sleeve. The intake part is formed as a circular segment with the middle point on the pivoting axis. The intake part consists of two parallel walls (50) formed as circular segments which enclose the intake part of the sleeve and are connected by a front wall.

Description

Die Erfindung betrifft eine Schutzhaube zur Abdeckung des rotierenden Sägeblatts einer Tischkreissäge nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a protective cover for covering the rotating saw blade of a table saw according to the preamble of patent claim 1.

Eine Schutzhaube dieser Gattung ist bekannt aus DE-U 90 04 162 der Anmelderin. Diese Schutzhaube hat sich bisher in großem Maße bewährt, nicht zuletzt wegen ihrer einfachen Konstruktion und ihrer zuverlässigen Funktion. Dies beruht darauf, dass die Schutzhaube in ihrer Ruhestellung mit ihrem unteren Rand immer auf dem Tisch der Kreissäge aufliegt und erst bei Zuführung eines zu sägenden Werkstücks dadurch angehoben wird, dass dieses gegen den nach oben geneigten Einlaufrand stößt, so dass die Schutzhaube in eine schräge Einlaufstellung kippt. Bei weiterem Vorschub des Werkstücks wird die Schutzhaube in eine Lage angehoben, in der der untere Rand mit einem der Werkstückdicke entsprechenden Abstand parallel über dem Tisch liegt. Wenn das Werkstück schließlich den hinteren Teil der Schutzhaube erreicht, kippt diese aufgrund ihres Eigengewichtes mit dem Einlaufende nach unten und verdeckt dadurch erneut den vorderen Teil des Sägeblattes. Wenn das Werkstück vollständig durchgeschoben ist, fällt die Schutzhaube wieder in die Ruhestellung auf den Tisch zurück.A protective hood of this kind is known from DE-U 90 04 162 the applicant. This guard has been proven to a great extent, not least because of its simple construction and its reliable function. This is due to the fact that the protective hood in its rest position always rests with its lower edge on the table of the circular saw and is raised only when feeding a workpiece to be sawn in that it abuts against the upwardly inclined inlet edge, so that the protective hood in an oblique Inlet position tilts. Upon further advancement of the workpiece, the protective cover is raised to a position in which the lower edge lies parallel to the table at a distance corresponding to the workpiece thickness. When the workpiece finally reaches the rear part of the protective hood, it tilts downwards due to its own weight with the inlet end, thereby concealing the front one again Part of the saw blade. When the workpiece is fully pushed through, the protective cover falls back to the rest position on the table.

Zu Beginn der Zuführung eines zu sägenden Werkstücks stößt dieses mit seiner vorderen Kante gegen den geradlinig nach oben geneigten Einlaufrand und muß an diesem entlang gleiten, um die Schutzhaube an ihrem Einlaufende nach oben anzuheben. Aufgrund der mehr oder weniger starken Reibung zwischen dem Werkstück und dem geneigten Einlaufrand stehen dieser Öffnungsbewegung Reibungskräfte entgegen, die auch vom Neigungswinkel des Einlaufrandes abhängen. Dadurch wird ein sanftes Einschieben des Werkstücks behindert, insbesondere im Fall von hohen Werkstücken, die über eine verhältnismäßig lange Strecke an dem Einlaufrand entlang vorgeschoben werden müssen.At the beginning of the supply of a workpiece to be sawn abuts this with its front edge against the rectilinear upward sloping inlet edge and must slide along this, to raise the guard at its inlet end upwards. Due to the more or less strong friction between the workpiece and the inclined inlet edge of this opening movement are opposed by frictional forces, which also depend on the inclination angle of the inlet edge. As a result, a smooth insertion of the workpiece is hindered, especially in the case of high workpieces, which must be advanced over a relatively long distance along the inlet edge.

Der Erfindung liegt die Aufgabe zugrunde, eine Schutzhaube für Kreissägen zur Verfügung zu stellen, die ein sanftes Anheben auf die Werkstückhöhe gewährleistet und bei der der Verschiebeweg am Einlaufrand entlang möglichst kurz ist.The invention has for its object to provide a protective cover for circular saw available, which ensures a gentle lifting to the workpiece height and in which the displacement is as short as possible along the inlet edge.

Bei einer Schutzhaube der angegebenen Gattung wird diese Aufgabe erfindungsgemäß dadurch gelöst, dass das Einlaufende als ein gesondertes Einlaufteil ausgebildet ist, das an der Schutzhaube um eine Schwenkachse frei drehbar angebracht ist.In a protective hood of the specified type, this object is achieved in that the inlet end is formed as a separate inlet part, which is freely rotatably mounted on the protective hood about a pivot axis.

Mit dieser Lösung wird erreicht, dass zu Beginn der Zuführung des Werkstücks das Einlaufteil zunächst über einen bestimmten Winkel gegen die Schutzhaube schwenkt, bevor es diese dann in die gekippte Stellung anhebt, in welcher sich das gegenüberliegende Ende der Schutzhaube auf dem Tisch abstützt. Bei dieser Schwenkbewegung zu Beginn der Werkstückzufuhr treten keine Reibungskräfte zwischen Werkstück und Einlaufende des Einlaufteils auf, was das sanfte Anheben der Schutzhaube auch bei höheren Werkstücken gewährleistet.With this solution it is achieved that at the beginning of the feeding of the workpiece, the inlet part initially pivots against the protective hood over a certain angle, before it then lifts it into the tilted position, in which the opposite end of the protective hood rests on the table. In this pivotal movement at the beginning of the workpiece feed occur No frictional forces between the workpiece and the inlet end of the inlet part, which ensures gentle lifting of the protective hood, even with higher workpieces.

In Weiterbildung der Erfindung ist die Schwenkachse des Einlaufteils zugleich die Schwenkachse der Schutzhaube, wobei in vorteilhafter Weise das Einlaufteil als ein Kreissegment mit dem Mittelpunkt auf der Schwenkachse ausgebildet ist.In a further development of the invention, the pivot axis of the inlet part is at the same time the pivot axis of the protective hood, wherein advantageously the inlet part is designed as a circular segment with the center on the pivot axis.

Aufgrund dieser Maßnahmen ist das Einlaufteil gegenüber einem Einlaufende des Standes der Technik mit einem festen, geradlinig nach oben geneigten Einlaufrand kürzer, was einerseits die Einlaufphase verringert und andererseits die Sicht auf die Schnittstelle verbessert.Due to these measures, the inlet part is shorter compared to an inlet end of the prior art with a fixed, straight upwardly inclined inlet edge, which on the one hand reduces the running-in phase and on the other hand improves the view of the interface.

Zu einer verbesserten Sichtkontrolle des Schnittvorgangs trägt ferner die zusätzliche Maßnahme bei, dass die zueinander parallelen Wände des Einlaufteils und der Schutzhaube aus durchsichtigem Kunststoff bestehen.For an improved visual inspection of the cutting process also contributes to the additional measure that the mutually parallel walls of the inlet part and the protective cover made of transparent plastic.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der folgenden Beschreibung eines Ausführungsbeispiels, das in der Zeichnung dargestellt ist. Es zeigen:

  • Figur 1 die perspektivische Ansicht einer Schutzhaube gemäß der Erfindung, wobei sich das Einlaufteil in der nach oben geschwenkten Ausgangsstellung befindet,
  • Figur 2 die Schutzhaube der Figur 1 mit dem Einlaufteil in einer Zwischenstellung,
  • Figur 3 die Schutzhaube mit dem Einlaufteil in der am weitesten eingeschwenkten Endstellung,
  • Figur 4 eine Seitenansicht der Schutzhaube im eingebauten Zustand in ihrer Ruhestellung,
  • Figuren 5 bis 9 der Figur 4 entsprechende Ansichten der Schutzhaube in den verschiedenen Phasen beim Durchschieben eines zu sägenden Werkstücks.
Further features and advantages of the invention will become apparent from the following description of an embodiment which is illustrated in the drawing. Show it:
  • FIG. 1 the perspective view of a protective hood according to the invention, wherein the inlet part is in the upwardly pivoted starting position,
  • FIG. 2 the protective hood of the FIG. 1 with the inlet part in an intermediate position,
  • FIG. 3 the guard with the inlet part in the farthest pivoted end position,
  • FIG. 4 a side view of the protective hood in the installed state in its rest position,
  • FIGS. 5 to 9 of the FIG. 4 corresponding views of the guard in the various phases when pushing through a workpiece to be sawn.

In den Figuren 4 bis 9 ist ein Tisch 10 einer Kreissäge zu erkennen, deren drehbar angetriebenes Sägeblatt 12 durch einen Spalt 14 über den Tisch 10 nach oben vorsteht. Zur Abdeckung dieses Teils des Sägeblattes 12 dient eine Schutzhaube 16, die gemäß den Figuren 1 bis 3 aus parallelen Wänden 18 besteht, die über eine oberen Abstandsleiste 20 miteinander verbunden sind; die Abstandsleiste 20 geht in eine schräg zum Tisch 10 hin geneigte Vorderwand 22 über, deren unteres Ende einen zum Tisch 10 hin offenen Einschnitt 24 hat. Auf der Abstandsleiste 20 ist ein Saugstutzen 68 für den Anschluß einer Saugleitung angebracht, die mit einer Staubabsaugvorrichtung verbunden werden kann.In the FIGS. 4 to 9 is a table 10 to recognize a circular saw, the rotatably driven saw blade 12 projects through a gap 14 above the table 10 upwards. To cover this part of the saw blade 12 is a protective cover 16, which according to the FIGS. 1 to 3 consists of parallel walls 18 which are interconnected via an upper spacer bar 20; the spacer bar 20 merges into an inclined front wall 22 inclined towards the table 10, the lower end of which has an incision 24 open towards the table 10. On the spacer bar 20, a suction nozzle 68 is attached for the connection of a suction line, which can be connected to a dust extraction device.

Die Schutzhaube 16 ist über eine horizontale Schwenkachse 26 zwischen zwei zueinander parallelen Schenkeln 28 eines Tragarms 30 frei schwenkbar gelagert, so dass sie in ihrer in Figur 4 gezeigten Ruhestellung mit ihrem unteren, geraden Rand 32 auf dem Tisch 10 aufliegt und dabei das Sägeblatt 12 überdeckt.The protective hood 16 is freely pivotably mounted on a horizontal pivot axis 26 between two mutually parallel legs 28 of a support arm 30, so that they are in their in FIG. 4 shown rest position with its lower, straight edge 32 rests on the table 10 and thereby covers the saw blade 12.

Der Tragarm 30 ist mit seinem hinteren Ende, das der Schwenkachse 26 gegenüberliegt, über eine zu dieser parallele Lagerachse 34 an einem Spaltkeil 36 frei schwenkbar gelagert, der im unteren Bereich ein Langloch 38 zu seiner Befestigung unterhalb des Tisches 10 hat.The support arm 30 is freely pivotably mounted with its rear end, which is opposite to the pivot axis 26, via a parallel to this bearing axis 34 on a riving knife 36, which has a slot 38 to its attachment below the table 10 in the lower area.

Ein Klemmhebel 40 dient dazu, den Tragarm 30 mit der Schutzhaube 16 rasch und einfach von dem Spaltkeil 36 zu entfernen beziehungsweise an diesem zu montieren.A clamping lever 40 serves to remove the support arm 30 with the protective cover 16 quickly and easily from the splitting wedge 36 or to assemble it.

Die Vorderwand 22 der Schutzhaube 16 liegt im Bereich von deren Einlaufende 42 (vgl. Figur 4), gegen das ein zu sägendes Werkstück 44, beispielsweise ein Brett oder eine Leiste, zugeführt wird. Gemäß der Erfindung ist dieses Einlaufende 42 als ein Einlaufteil 46 ausgebildet, das an der Schutzhaube 16 um eine Schwenkachse frei drehbar angebracht ist; diese Schwenkachse ist vorzugsweise zugleich die Schwenkachse 26 der Schutzhaube 16.The front wall 22 of the protective hood 16 lies in the region of its inlet end 42 (cf. FIG. 4 ) against which a workpiece 44 to be sawn, such as a board or strip, is supplied. According to the invention, this inlet end 42 is formed as an inlet part 46 which is freely rotatably mounted on the protective hood 16 about a pivot axis; This pivot axis is preferably at the same time the pivot axis 26 of the protective cover 16th

Das Einlaufteil 46 ist, wie das dargestellte Ausführungsbeispiel zeigt, bevorzugt als ein Kreissegment ausgebildet, dessen Mittelpunkt auf der Schwenkachse 26 liegt. Das Einlaufende 42 der Schutzhaube 16 ist ebenfalls, wie in Figur 2 zu erkennen, als nach oben geneigter Einlaufrand 48 ausgebildet, der die Form eines Kreissektors mit demselben Radius wie das Kreissegment des Einlaufteils 46 hat.The inlet part 46 is, as the illustrated embodiment, preferably formed as a circular segment, the center of which lies on the pivot axis 26. The inlet end 42 of the protective hood 16 is also, as in FIG. 2 to recognize, as upwardly inclined inlet edge 48 is formed, which has the shape of a circular sector with the same radius as the circular segment of the inlet part 46.

Das Einlaufteil 46 besteht aus zwei parallelen kreissegmentförmigen Wänden 50, die das Einlaufende 42 der Schutzhaube 16 umschließen und wie diese aus durchsichtigem Kunststoff bestehen. Die beiden Wände 50 des Einlaufteils 46 sind durch eine Frontwand 52 verbunden, welche der Vorderwand 22 der Schutzhaube 16 gegenüberliegt (vgl. Figur 2). In die Frontwand 52 ist ein Fenster 54 eingebaut, das die Sicht auf die Schnittstelle verbessert und an das sich nach unten eine schlitzförmige Öffnung 56 anschließt.The inlet part 46 consists of two parallel circular segment-shaped walls 50 which surround the inlet end 42 of the protective cover 16 and how these consist of transparent plastic. The two walls 50 of the inlet part 46 are connected by a front wall 52, which the front wall 22 of the protective cover 16 is opposite (see. FIG. 2 ). In the front wall 52, a window 54 is installed, which improves the view of the interface and connects to the down a slot-shaped opening 56.

Der Schwenkwinkel des Einlaufteils 46 um die Schwenkachse 26 wird durch Anschlagelemente begrenzt, die aus einem kreisbogenförmigen Schlitz 58 in wenigstens einer Wand 50 des Einlaufteils 46 und einem darin eingreifenden Stift 60 bestehen, der von der gegenüberliegenden Seite der Vorderwand 22 der Schutzhaube 16 absteht; der Radiusmittelpunkt des kreisbogenförmigen Schlitzes 58 liegt auf der Schwenkachse 26.The pivot angle of the inlet part 46 about the pivot axis 26 is limited by stop elements consisting of a circular arc slot 58 in at least one wall 50 of the inlet part 46 and a pin 60 engaging therein, which protrudes from the opposite side of the front wall 22 of the protective cover 16; the radius center of the circular arc-shaped slot 58 lies on the pivot axis 26.

Aus den Figuren 4 bis 9 ergibt sich die Wirkungsweise der erfindungsgemäß ausgebildeten Schutzhaube 16 mit ihrem Einlaufteil 46. Dieses befindet sich in der in den Figuren 1 und 4 dargestellten Ruhestellung in seiner am weitesten nach oben geschwenkten Ausgangsstellung, in der das untere Ende des kreisbogenförmigen Schlitzes 58 an dem Stift 60 anliegt. In dieser Ausgangsstellung wird das Einlaufteil 46 durch eine Rückstellfeder 62 gehalten, beispielsweise eine Blattfeder, die mittels einer Schraube 64 an der Abstandsleiste 20 befestigt ist und deren freies Ende gegen die Frontwand 52 des Einlaufteils 46 drückt.From the FIGS. 4 to 9 results in the operation of the inventively designed protective cover 16 with its inlet part 46. This is located in the in FIGS. 1 and 4 shown rest position in its most upwardly pivoted starting position, in which the lower end of the circular arc-shaped slot 58 rests against the pin 60. In this initial position, the inlet part 46 is held by a return spring 62, for example a leaf spring, which is fastened by means of a screw 64 on the spacer bar 20 and the free end presses against the front wall 52 of the inlet part 46.

Wenn gemäß den Figuren 5 und 6 ein zu sägendes Werkstück 44 zugeführt wird, stößt dieses mit seiner vorderen Kante gegen den unteren Rand des kreissegmentförmigen Einlaufteils 46 und dreht dieses durch Reibungsmitnahme um die Schwenkachse 26. In Figur 2 ist eine Zwischenstellung angedeutet, während Figur 3 die Endstellung zeigt, in der das obere Ende des kreisbogenförmigen Schlitzes 58 zur Anlage an dem Stift 60 kommt.If according to the FIGS. 5 and 6 a workpiece to be sawn 44 is supplied, this pushes with its front edge against the lower edge of the circular segment-shaped inlet part 46 and rotates this by Reibungsmitnahme about the pivot axis 26. In FIG. 2 is an intermediate position hinted while FIG. 3 shows the end position in which the upper end of the circular arc-shaped slot 58 comes to rest on the pin 60.

Auf diese Weise erfolgt zu Beginn des Sägevorgangs ein sanftes Anheben der Schutzhaube 16 in ihre geneigte Lage, bei der sie sich, wie Figur 7 zeigt, mit ihrer hinteren Kante 66 noch auf dem Tisch 10 abstützt. Erst mit weitere Zuführung des Werkstücks 44 hebt dieses den unteren Rand 32 des Sägeblattes 12 in seine parallele Lage über dem Tisch 10 (vgl. Figur 8), bis gegen Ende des Sägevorgangs die Schutzhaube 16 mit ihrem Einlaufteil 46 vorn nach unten kippt. Nachdem das Werkstück 44 vollständig durchgeschoben ist, fällt die Schutzhaube 16 wieder in ihre Ruhestellung auf den Tisch 10 zurück.In this way, at the beginning of the sawing operation, a gentle lifting of the protective cover 16 in its inclined position, in which they, as FIG. 7 shows, with its rear edge 66 still supported on the table 10. Only with further feeding of the workpiece 44 lifts this the lower edge 32 of the saw blade 12 in its parallel position above the table 10 (see. FIG. 8 ), until at the end of the sawing process, the protective hood 16 with its inlet part 46 tilts forward down. After the workpiece 44 is completely pushed through, the protective cover 16 falls back into its rest position on the table 10.

Durch geeignete Maßnahmen kann der durch den kreisbogenförmigen Schlitz 58 vorgegebene Schwenkwinkel des Einlaufteils 46 begrenzt werden, beispielsweise durch ein verstellbares Verschlusselement, wodurch das Einlaufteil 46 in der in Figur 1 gezeigten Ausgangsstellung schon um einen kleinen Winkel gegen die Schutzhaube 16 verschwenkt ist. In dieser Ausgangsstellung liegt das Einlaufteil 46 bereits näher an dem Sägeblatt 12. Dies ist vor allem für dünne Werkstücke 44 und damit für kleine Schnitthöhen günstig, um die Sicht auf die Schnittstelle zu verbessern.By suitable measures, the predetermined by the arcuate slot 58 pivot angle of the inlet part 46 can be limited, for example by an adjustable closure element, whereby the inlet part 46 in the in FIG. 1 shown starting position is already pivoted by a small angle against the protective cover 16. In this initial position, the inlet part 46 is already closer to the saw blade 12. This is particularly favorable for thin workpieces 44 and thus for small cutting heights to improve the view of the interface.

Claims (10)

Schutzhaube zur Abdeckung des rotierenden Sägeblatts (12) einer Tischkreissäge, an der die Schutzhaube (16) mittels eines Spaltkeils (36) , der sich über den Tisch (10) der Tischkreissäge erhebt, und eines daran um eine horizontale Lagerachse (34) schwenkbar gelagerten Tragarms (30) anbringbar ist, an dem die Schutzhaube (16) um eine zur Lagerachse (34) parallele Schwenkachse (26) frei schwenkbar so gelagert ist, dass sie in Ruhestellung mit ihrem unteren Rand (32) auf dem Tisch (10) aufliegt und das Sägeblatt (12) überdeckt, wobei der untere Rand (32) der Schutzhaube (16) in einen der Zuführrichtung für ein zu sägendes Werkstück (44) zugewandten, vom Tisch (10) aus nach oben geneigten Einlaufrand (48) übergeht, der an einem Einlaufende (42) der Schutzhaube (16) ausgebildet ist, dadurch gekennzeichnet, dass das Einlaufende (42) als ein gesondertes Einlaufteil (46) ausgebildet ist, das an der Schutzhaube (16) um eine Schwenkachse frei drehbar angebracht ist.Protective hood for covering the rotating saw blade (12) of a circular table saw, on which the protective hood (16) by means of a splitting wedge (36) which rises above the table (10) of the table saw and a pivotally mounted about a horizontal bearing axis (34) Support arm (30) is attachable, on which the protective hood (16) about a pivot axis parallel to the bearing axis (34) pivotally mounted (26) is mounted so that it rests in the rest position with its lower edge (32) on the table (10) and the saw blade (12) covered, wherein the lower edge (32) of the protective hood (16) in one of the feed direction for a workpiece to be sawn (44), from the table (10) upwardly inclined inlet edge (48), which at an inlet end (42) of the protective hood (16) is formed, characterized in that the inlet end (42) is formed as a separate inlet part (46) which is freely rotatably mounted on the protective hood (16) about a pivot axis. Schutzhaube nach Anspruch 1, dadurch gekennzeichnet, dass die Schwenkachse des Einlaufteils (46) zugleich die Schwenkachse (26) der Schutzhaube (16) ist.Protective hood according to claim 1, characterized in that the pivot axis of the inlet part (46) at the same time the pivot axis (26) of the protective hood (16). Schutzhaube nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Einlaufteil (46) als ein Kreissegment mit dem Mittelpunkt auf der Schwenkachse (26) ausgebildet ist.Protective hood according to claim 1 or 2, characterized in that the inlet part (46) is designed as a circular segment with the center on the pivot axis (26). Schutzhaube nach Anspruch 3, dadurch gekennzeichnet, dass der am Einlaufende (42) der Schutzhaube (16) ausgebildete, nach oben geneigte Einlaufrand (48) die Form eines Kreissektors mit demselben Radius wie das Kreissegment des Einlaufteils (46) hat.Protective hood according to claim 3, characterized in that at the inlet end (42) of the protective hood (16) formed, upwardly inclined inlet edge (48) has the shape of a circular sector with the same radius as the circular segment of the inlet part (46). Schutzhaube nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass das Einlaufteil (46) aus zwei parallelen, kreissegmentförmigen Wänden (50) besteht, die das Einlaufende (42) der Schutzhaube (16) umschließen und durch eine Frontwand (52) verbunden sind.Protective hood according to claim 3 or 4, characterized in that the inlet part (46) consists of two parallel, circular segment-shaped walls (50) which surround the inlet end (42) of the protective hood (16) and are connected by a front wall (52). Schutzhaube nach Anspruch 5, dadurch gekennzeichnet, dass in die Frontwand (52) ein Fenster (54) eingebaut ist.Protective hood according to claim 5, characterized in that in the front wall (52) has a window (54) is installed. Schutzhaube nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass der Frontwand (52) des Einlaufteils (46) eine das Einlaufende (42) der Schutzhaube (16) abschließende Vorderwand (22) gegenüberliegt, die einen zum Tisch (10) hin weisenden Einschnitt (24) hat.Protective hood according to Claim 5 or 6, characterized in that the front wall (52) of the inlet part (46) is opposite a front wall (22) which terminates the inlet end (42) of the protective hood (16) and which has an incision (10) pointing towards the table (10). 24). Schutzhaube nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schwenkwinkel des Einlaufteils (46) durch einstellbare Anschlagelemente (58, 60) begrenzbar ist.Protective hood according to one of the preceding claims, characterized in that the pivoting angle of the inlet part (46) can be limited by adjustable stop elements (58, 60). Schutzhaube nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass an der Schutzhaube (16) eine Rückstellfeder (62) angebracht ist, die in Wirkverbindung mit dem Einlaufteil (46) ist und dieses in seiner Ruhestellung in die am weitesten nach oben ausgeschwenkte Ausgangsstellung dreht.Protective hood according to one of the preceding claims, characterized in that on the protective cover (16) a return spring (62) is mounted, which is in operative connection with the inlet part (46) and this rotates in its rest position in the pivoted-up starting position. Schutzhaube nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zueinander parallelen Wände (50; 18) des Einlaufteils (46) und der Schutzhaube (16) aus durch-sichtigem Kunststoff bestehen.Protective hood according to one of the preceding claims, characterized in that the mutually parallel walls (50, 18) of the inlet part (46) and the protective hood (16) consist of transparent plastic.
EP20080103438 2008-04-08 2008-04-08 Circular saw protective cover Not-in-force EP2108491B8 (en)

Priority Applications (1)

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EP20080103438 EP2108491B8 (en) 2008-04-08 2008-04-08 Circular saw protective cover

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EP20080103438 EP2108491B8 (en) 2008-04-08 2008-04-08 Circular saw protective cover

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EP2108491A1 true EP2108491A1 (en) 2009-10-14
EP2108491B1 EP2108491B1 (en) 2012-08-01
EP2108491B8 EP2108491B8 (en) 2012-09-26

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012016435A1 (en) * 2010-08-06 2012-02-09 浙江世达工具制造有限公司 Table cutting type protective cover of composite saw
JP2012115946A (en) * 2010-11-30 2012-06-21 Hitachi Koki Co Ltd Tabletop cutting machine
CN109128990A (en) * 2016-12-14 2019-01-04 安徽送变电工程有限公司 The Multi-function protective cover of improved circular saw

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20020C (en) C. HOFFMANN in Aue, Sachsen Circular saw guards with parallelogram guide
US281275A (en) * 1883-07-17 Henry f
DE68199C (en) * 1892-11-04 1893-04-26 P. BERNER in Dresden-Altstadt, Eliasplatz 2 Protective device for circular saws
US1563317A (en) * 1923-09-22 1925-12-01 Westinghouse Electric & Mfg Co Saw guard
US2106321A (en) * 1937-02-16 1938-01-25 Guertin Gilles Saw guard
FR1123696A (en) 1955-03-05 1956-09-25 Sncf Circular saw guard
US3249134A (en) 1964-01-30 1966-05-03 Wilton Corp Saw and dado guard
CH495822A (en) * 1968-09-02 1970-09-15 A Volkenborn Maschf Accident protection device for circular saws
US3880032A (en) * 1973-08-22 1975-04-29 Dwight C Green Feeler operated saw guard
DE2839299A1 (en) * 1978-09-09 1980-03-27 Ruhenstroth Wirus Werke Safety cover for circular saw - has lateral skirts with wheels arranged on cover and connected by axles
DE9004162U1 (en) 1990-04-02 1990-06-13 Schweizerische Unfallversicherungsanstalt SUVA, Luzern Protective hood device on circular saw
US6276064B1 (en) * 1996-05-31 2001-08-21 Black & Decker, Inc. Viewing window for saw guard and method of making same
DE102006055018B3 (en) * 2006-11-22 2007-10-31 Metabowerke Gmbh Circular saw bench, has rotatably driven saw blade provided with gear ring that is supported below workbench, where area of free end of saw blade engages in corresponding recess in workbench in resting position

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20020C (en) C. HOFFMANN in Aue, Sachsen Circular saw guards with parallelogram guide
US281275A (en) * 1883-07-17 Henry f
DE68199C (en) * 1892-11-04 1893-04-26 P. BERNER in Dresden-Altstadt, Eliasplatz 2 Protective device for circular saws
US1563317A (en) * 1923-09-22 1925-12-01 Westinghouse Electric & Mfg Co Saw guard
US2106321A (en) * 1937-02-16 1938-01-25 Guertin Gilles Saw guard
FR1123696A (en) 1955-03-05 1956-09-25 Sncf Circular saw guard
US3249134A (en) 1964-01-30 1966-05-03 Wilton Corp Saw and dado guard
CH495822A (en) * 1968-09-02 1970-09-15 A Volkenborn Maschf Accident protection device for circular saws
US3880032A (en) * 1973-08-22 1975-04-29 Dwight C Green Feeler operated saw guard
DE2839299A1 (en) * 1978-09-09 1980-03-27 Ruhenstroth Wirus Werke Safety cover for circular saw - has lateral skirts with wheels arranged on cover and connected by axles
DE9004162U1 (en) 1990-04-02 1990-06-13 Schweizerische Unfallversicherungsanstalt SUVA, Luzern Protective hood device on circular saw
US6276064B1 (en) * 1996-05-31 2001-08-21 Black & Decker, Inc. Viewing window for saw guard and method of making same
DE102006055018B3 (en) * 2006-11-22 2007-10-31 Metabowerke Gmbh Circular saw bench, has rotatably driven saw blade provided with gear ring that is supported below workbench, where area of free end of saw blade engages in corresponding recess in workbench in resting position

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012016435A1 (en) * 2010-08-06 2012-02-09 浙江世达工具制造有限公司 Table cutting type protective cover of composite saw
JP2012115946A (en) * 2010-11-30 2012-06-21 Hitachi Koki Co Ltd Tabletop cutting machine
CN109128990A (en) * 2016-12-14 2019-01-04 安徽送变电工程有限公司 The Multi-function protective cover of improved circular saw
CN109128990B (en) * 2016-12-14 2019-09-20 安徽送变电工程有限公司 Improved Multifunctional Guard for Circular Saw

Also Published As

Publication number Publication date
EP2108491B1 (en) 2012-08-01
EP2108491B8 (en) 2012-09-26

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