EP1522394B1 - Circular saw with riving knife - Google Patents

Circular saw with riving knife Download PDF

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Publication number
EP1522394B1
EP1522394B1 EP04009771A EP04009771A EP1522394B1 EP 1522394 B1 EP1522394 B1 EP 1522394B1 EP 04009771 A EP04009771 A EP 04009771A EP 04009771 A EP04009771 A EP 04009771A EP 1522394 B1 EP1522394 B1 EP 1522394B1
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EP
European Patent Office
Prior art keywords
circular saw
splitting wedge
adjusting
saw according
saw blade
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EP04009771A
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German (de)
French (fr)
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EP1522394A2 (en
EP1522394A3 (en
Inventor
Konrad Westermann
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Metabowerke GmbH and Co
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Metabowerke GmbH and Co
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Publication of EP1522394A2 publication Critical patent/EP1522394A2/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
    • B27G19/08—Accessories for keeping open the saw kerf, e.g. riving knives or wedge plates

Abstract

Circular saw comprises a saw blade rotatably mounted on a support construction and an adjustable splitting wedge fixed on a spacer (4) and adjusted by the spacer relative to the support construction in the plane of the saw blade. The spacer has a first (13) and a second adjusting component (14) and an adjusting mechanism (15). The adjusting components have steep planes (16, 17) that are arranged against each other. Parallel adjustment of the splitting wedge is carried out by displacing the steep planes relative to each other. An independent claim is also included for an alternative circular saw.

Description

Die vorliegende Erfindung betrifft eine Kreissäge mit einem verstellbaren Spaltkeil gemäß dem Oberbegriff des Anspruchs 1 oder des Anspruchs 7.The present invention relates to a circular saw with an adjustable splitting wedge according to the preamble of claim 1 or claim 7.

Beim Sägen eines Werkstücks mit einer Kreissäge besteht die Gefahr, daß der schon geschnittene Teil des Werkstücks zurückfedert und dadurch das Sägeblatt einklemmt. Um dies zu verhindern, weisen Kreissägen nach dem Stand der Technik fluchtend hinter dem Sägeblatt einen Spaltkeil auf. Da die Position des Sägeblattes bei unterschiedlichen Sägeblättern verschieden sein kann oder aber der Spaltkeil selbst verbogen oder verschoben sein kann, ist es notwendig, eine Vorrichtung vorzusehen, mit der der Spaltkeil in die Ebene des Sägeblatts verstellbar ist.When sawing a workpiece with a circular saw, there is a risk that the already cut part of the workpiece springs back and thereby jams the saw blade. To prevent this, have circular saws according to the prior art, in alignment behind the saw blade on a riving knife on. Since the position of the saw blade may be different for different saw blades or else the splitting wedge itself may be bent or displaced, it is necessary to provide a device with which the splitting wedge is adjustable in the plane of the saw blade.

Aus der DE 83 12 668 U ist eine Kreissäge mit einem verstellbaren Spaltkeil bekannt. Die Ausrichtung des Spaltkeils in die Ebene des Sägeblattes erfolgt durch eine Stellschraube, mit deren Hilfe der Spaltkeil gebogen werden kann.From the DE 83 12 668 U is a circular saw with an adjustable riving knife known. The alignment of the splitting wedge in the plane of the saw blade is done by a set screw, with the help of the riving knife wedge can be bent.

Der Spaltkeil ist mit einem unteren Ende mit einem Gehäuse fest verbunden. Die Stellschraube ist oberhalb der festen Verbindung angeordnet, so daß der obere Teil des Spaltkeils durch Verstellung der Stellschraube in die Ebene des Sägeblattes gedrückt werden kann.The riving knife is firmly connected to a lower end with a housing. The adjusting screw is arranged above the fixed connection, so that the upper part of the splitting wedge can be pressed by adjusting the adjusting screw in the plane of the saw blade.

Nachteilig an dieser Anordnung ist, daß der Spaltkeil einer ständigen Biegebelastung ausgesetzt ist. Weiterhin muß der Spaltkeil so dünn sein, daß die Biegung durch die Stellschraube leicht möglich ist. Dies führt zu einer insgesamt instabilen Konstruktion. Ein Biegen des Spaltkeils während des Sägevorganges ist auch durch das Werkstück möglich und verursacht einen unpräzisen Schnitt.A disadvantage of this arrangement is that the splitting wedge is exposed to a constant bending load. Furthermore, the riving knife must be so thin that the bend is easily possible by the screw. This leads to an overall unstable construction. A bending of the splitting wedge during the sawing process is also possible by the workpiece and causes an imprecise cut.

Eine weitere Möglichkeit besteht darin, den Spaltkeil an einem hochpräzisen Halterungsteil zu befestigen, so daß eine Einstellung des Spaltkeils nicht mehr notwendig ist. Nachteilig hieran sind hohe Fertigungskosten für das Halterungsteil und eine fehlende Anpassungsmöglichkeit an Sägeblätter unterschiedlicher Dicke.Another possibility is to attach the splitting wedge to a high-precision support part, so that an adjustment of the splitting wedge is no longer necessary. A disadvantage of this is the high production costs for the support member and a lack of customization of saw blades of different thickness.

Aus dem Stand der Technik sind auch Möglichkeiten bekannt, den Spaltkeil in die Ebene des Sägeblattes zu verschieben. Dies sind das Unterlegen von Distanzblechen, die Vorspannung des Spaltkeils in eine Richtung durch z. B. Tellerfedern und die gegenläufige Einstellung durch diverse Stellschrauben ( DE-C-917 746 ). Nachteilig an diesen Methoden ist ein hoher Montageaufwand und eine schlechte Einstellbarkeit. Vorteilhaft dabei ist, daß der Spaltkeil nicht in die Ebene des Sägeblattes gebogen werden muß, sondern fest an einem Distanzstück montiert ist und durch dieses parallel in die Ebene des Sägeblattes verstellt wird.There are also known from the prior art possibilities to move the splitting wedge into the plane of the saw blade. These are the underlaying of spacer plates, the bias of the splitting wedge in one direction by z. B. disc springs and the opposite adjustment by various screws ( DE-C-917 746 ). A disadvantage of these methods is a high installation cost and poor adjustability. The advantage here is that the splitting wedge does not have to be bent in the plane of the saw blade, but is fixedly mounted on a spacer and is adjusted by this parallel in the plane of the saw blade.

Der vorliegenden Erfindung liegt das Problem zugrunde, den Spaltkeil an einer Kreissäge so zu konstruieren, daß dieser stabil ist und gleichzeitig eine Verstellung in die Ebene des Sägeblattes bei einfacher Bedienbarkeit ermöglicht wird.The present invention is based on the problem to construct the riving knife on a circular saw so that it is stable and at the same time an adjustment in the plane of the saw blade is made possible with ease of use.

Das oben genannte Problem wird durch eine Kreissäge mit einem Spaltkeil gemäß Anspruch 1 gelöst. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche 2 bis 6.The above problem is solved by a circular saw with a riving knife according to claim 1. Advantageous developments are subject of the dependent claims 2 to 6.

Erfindungsgemäß ist vorgesehen, daß das Distanzstück zwei Verstellbauteile aufweist, die relativ zueinander an schiefen Ebenen entlang verschiebbar sind.According to the invention it is provided that the spacer has two adjustment components which are displaceable relative to each other at inclined planes.

Besonders vorteilhaft ist es, wenn die schiefen Ebenen an den Verstellbauteilen durch mehrere Zacken gebildet werden. Dabei sollte ein solcher Winkel vorgebbar sein, daß bei einer geringen Verschiebung der beiden schiefen Ebenen gegeneinander bereits ein erkennbarer paralleler Versatz des Spaltkeils vorliegt. Hierfür sind mehrere Zacken nicht zwingend erforderlich. Bei Verwendung mehrerer Zacken ist die Auflagefläche zwischen den Verstellbauteilen jedoch größer, ohne daß hierzu die Verstellbauteile selbst dicker gestaltet werden müssen.It is particularly advantageous if the inclined planes on the adjustment components are formed by a plurality of points. In this case, such an angle should be specified that with a slight displacement of the two inclined planes against each other already present a recognizable parallel offset of the splitting wedge. For this purpose, several teeth are not mandatory. When using a plurality of prongs, however, the bearing surface between the adjusting components is larger without the adjustment components themselves having to be made thicker.

Wenn die Verstellbauteile mittig durch eine Kombination aus einer Schreibe und einer Mutter einschließlich einer Tellerfeder zusammengehalten werden und der Spaltkeil gleichzeitig mittels dieser Kombination befestigt ist, kann auf ein zusätzliches Befestigungselement für den Spaltkeil verzichtet werden.If the adjusting members are held together centrally by a combination of a write and a nut including a plate spring and the splitting wedge is fastened at the same time by means of this combination, can be dispensed with an additional fastening element for the splitting wedge.

Die zwei Verstellbauteile werden durch die Tellerfeder gegeneinander gedrückt, solange keine zusätzliche Kraft wirkt.The two adjusting components are pressed against each other by the diaphragm spring, as long as no additional force acts.

Die zusätzliche Kraft wird vorteilhafterweise durch eine Stellschraube aufgebracht, die eines der Verstellbauteile relativ zu dem anderen Verstellbauteil verschiebt.The additional force is advantageously applied by an adjusting screw, which shifts one of the adjusting components relative to the other adjusting component.

In einer anderen Ausführungsform (Ansprüche 7 bis 11) weist das Distanzstück keine zwei Verstellbauteile sondern statt dessen ein Lenkgestänge auf.In another embodiment (claims 7 to 11), the spacer has no two adjusting components but instead a steering linkage.

Weitere Einzelheiten, Merkmale, Ziele und Vorteile der vorliegenden Erfindung werden nachfolgend anhand der Zeichnung eines bevorzugten Ausführungsbeispiels näher erläutert. In der Zeichnung zeigt

Fig. 1
eine perspektivische, ausschnittweise Ansicht einer Kreissäge mit einem Distanzstück zur Spaltkeilverstellung,
Fig. 2
eine perspektivische Ansicht eines Verstellbauteils,
Fig. 3
eine perspektivische Ansicht eines Distanzstücks,
Fig.4
eine perspektivische Ansicht eines weiteren Ausführungsbeispiels.
Further details, features, objects and advantages of the present invention will be explained in more detail with reference to the drawing of a preferred embodiment. In the drawing shows
Fig. 1
a perspective, fragmentary view of a circular saw with a spacer for riving knife adjustment,
Fig. 2
a perspective view of an adjustment,
Fig. 3
a perspective view of a spacer,
Figure 4
a perspective view of another embodiment.

Die in Fig. 1 gezeigte Kreissäge weist auf eine Tragkonstruktion 1, ein Sägeblatt 2, einen Spaltkeil 3 und ein Distanzstück 4. Das Sägeblatt 2 ist drehbar an der Tragkonstruktion 1 befestigt und wird durch einen Motor angetrieben. Das Distanzstück 4 ist an der Tragkonstruktion 1 angebracht. Der Spaltkeil 3 ist mittels eines Befestigungselements 5, an dem Distanzstück 4 in einer Haltestellung angebracht und durch das Distanzstück 4 parallel zu sich selbst in die Ebene des Sägeblatts 2 verstellbar. Das Befestigungselement 5 weist, vorzugsweise, eine Kombination aus einer Schraube und einer Mutter auf.In the Fig. 1 Circular saw shown points to a support structure 1, a saw blade 2, a splitting wedge 3 and a spacer 4. The saw blade 2 is rotatably mounted on the support structure 1 and is driven by a motor. The spacer 4 is attached to the support structure 1. The splitting wedge 3 is by means of a fastening element 5, on the spacer 4 in a holding position mounted and adjustable by the spacer 4 parallel to itself in the plane of the saw blade 2. The fastening element 5 has, preferably, a combination of a screw and a nut.

Der Spaltkeil 3 weist einen hier bogenförmigen Schlitz 7 auf. Das Befestigungselement 5, mit dem der Spaltkeil 3 an dem Distanzstück 4 befestigt ist, erstreckt sich durch den Schlitz 7. Durch den Schlitz 7 wird eine Änderung der Haltestellung des Spaltkeils 3 ermöglicht. Die Änderung der Haltestellung ermöglicht dann eine Höhen- und/oder Distanzverstellung des Spaltkeils 3 relativ zum Sägeblatt 2.The riving knife 3 has an arcuate slot 7 here. The fastening element 5, with which the splitting wedge 3 is fastened to the spacer 4, extends through the slot 7. The slot 7 makes it possible to change the holding position of the splitting wedge 3. The change of the holding position then enables a height and / or distance adjustment of the splitting wedge 3 relative to the saw blade 2.

Das Distanzstück 4 weist zwei überstehende Laschen 8, 9 (Fig. 1), vorzugsweise an der Ober- und Unterseite auf. Bei an dem Distanzstück 4 befestigtem Spaltkeil 3 ragen die zwei Laschen 8, 9 in den bogenförmigen Schlitz 7 des Spaltkeils 3 hinein. Von der den Laschen 8, 9 gegenüberliegenden Seite wird eine Befestigungsscheibe 10, die Aussparungen 11, 12 für die Laschen 8, 9 aufweist, gegen den Spaltkeil 3 gedrückt. Das Befestigungselement 5, das den Spaltkeil 3 an dem Distanzstück 4 befestigt, befestigt darüber hinaus auch die Befestigungsscheibe 10 an Spaltkeil 3 und Distanzstück 4.The spacer 4 has two protruding tabs 8, 9 (FIG. Fig. 1 ), preferably at the top and bottom. When attached to the spacer 4 riving knife 3, the two tabs 8, 9 protrude into the arcuate slot 7 of the riving knife 3 inside. From the tabs 8, 9 opposite side is a fixing plate 10, the recesses 11, 12 for the tabs 8, 9, pressed against the riving knife 3. The fastening element 5, which secures the splitting wedge 3 to the spacer 4, moreover, also secures the fastening disk 10 to the splitting wedge 3 and spacer 4.

In einer ersten Ausführung (Fig. 2) weist das Distanzstück 4 ein erstes und ein zweites Verstellbauteil 13, 14 und einen Verstellmechanismus 15 auf. Das erste Verstellbauteil 13 ist an der Tragkonstruktion 1 befestigt. Der Spaltkeil 3 ist an dem zweiten Verstellbauteil 14 befestigt. Die Verstellbauteile 13, 14 weisen jeweils eine schiefe Ebene 16, 17 auf. Die Verstellbauteile 13,14 sind mit den schiefen Ebenen 16, 17 gegeneinander angeordnet. Eine Verschiebung der schiefen Ebenen 16, 17 gegeneinander bewirkt somit eine Parallelverstellung des Spaltkeils 3.In a first embodiment ( Fig. 2 ), the spacer 4, a first and a second adjusting member 13, 14 and an adjusting mechanism 15. The first adjusting component 13 is fastened to the supporting structure 1. The splitting wedge 3 is fastened to the second adjusting component 14. The adjusting components 13, 14 each have an inclined plane 16, 17. The adjusting members 13,14 are arranged with the inclined planes 16, 17 against each other. A displacement of the inclined planes 16, 17 against each other thus causes a parallel adjustment of the splitting wedge third

In einer bevorzugten Ausführung weisen die schiefen Ebenen 16, 17 jeweils mehrere Zacken 18, 19, 20 auf. Insbesondere ist ein solcher Winkel vorgebbar, daß bei einer geringen Verschiebung der beiden schiefen Ebenen 16, 17 gegeneinander bereits ein erkennbarer paralleler Versatz des Spaltkeils 3 vorliegt. Durch die Zacken 18, 19, 20 wird gewährleistet, daß die Auflagefläche zwischen den Verstellbauteilen 13, 14 groß bleibt, ohne daß hierfür die Verstellbauteile 13, 14 selbst dicker sein müssen. Die große Auflagefläche führt zu einer stabileren Führung des Spaltkeils 3.In a preferred embodiment, the inclined planes 16, 17 each have a plurality of prongs 18, 19, 20. In particular, such an angle can be specified that, with a slight displacement of the two inclined planes 16, 17, a recognizable parallel offset of the splitting wedge 3 is already present to one another. By the serrations 18, 19, 20 it is ensured that the bearing surface between the adjusting components 13, 14 remains large, without the adjustment components for this purpose 13, 14 must be thicker. The large bearing surface leads to a more stable guidance of the splitting wedge 3.

Beide Verstellbauteile 13, 14 weisen in der Mitte jeweils eine Aussparung 21, 22 auf (Fig. 2, 3). Sie sind mittels eines Befestigungselements 5a, welches durch die Aussparungen 21, 22 verläuft, gegeneinander befestigt. In einer bevorzugten Ausführung ist das Befestigungselement 5a das selbe wie das Befestigungselement 5, mit dem der Spaltkeil 3 an dem Distanzstück 4 bzw. genauer an dem zweiten Verstellbauteil 14 des Distanzstückes 4 befestigt ist.Both adjusting components 13, 14 each have a recess 21, 22 in the middle ( Fig. 2 . 3 ). They are fastened to one another by means of a fastening element 5a, which runs through the recesses 21, 22. In a preferred embodiment, the fastening element 5a is the same as the fastening element 5, with which the splitting wedge 3 is fastened to the spacer 4 or more precisely to the second adjusting component 14 of the spacer 4.

In dem beschriebenen Ausführungsbeispiel ist zusätzlich an dem Befestigungselement 5 eine Tellerfeder 23 vorgesehen, die eine Rückstellkraft erzeugt. Durch die Rückstellkraft werden die beiden Verstellbauteile 13, 14 gegeneinander gedrückt, solange keine Gegenkraft wirkt. Die Rückstellkraft kann jedoch auch durch eine andere Konstruktion, insbesondere eine andere Federanordnung, vorgesehen werden. Die Gegenkraft für die Verstellung des Spaltkeils 3 wird durch den Verstellmechanismus 15 aufgebracht.In the described embodiment, a plate spring 23 is additionally provided on the fastening element 5, which generates a restoring force. By the restoring force, the two adjustment members 13, 14 are pressed against each other, as long as no counterforce acts. However, the restoring force can also be provided by another construction, in particular another spring arrangement. The counterforce for the adjustment of the splitting wedge 3 is applied by the adjusting mechanism 15.

Das erste Verstellbauteil 13 ist , vorzugsweise, an der Tragkonstruktion angebracht und das zweite Verstellbauteil 14 mit dem Spaltkeil 3 ist durch den Verstellmechanismus 15 relativ zu dem ersten Verstellbauteil 13 verstellbar. Der Verstellmechanismus 15 weist einen Überstand 24 an dem zweiten Verstellbauteil 14, eine Stellschraube 25 und einen Anschlag 26 auf. Der Überstand 24 ragt in eine randseitige Aussparung 27 des ersten Verstellbauteils 13 hinein. Der Überstand 24 weist ein Innengewinde, das parallel zur Ebene des Sägeblattes 2 verläuft, auf. In das Innengewinde ist die Stellschraube 25 einschraubbar. Zur einfacheren Bedienung ist die Stellschraube 25 vorzugsweise als Inbusschraube ausgelegt. Bei zusammengesetzter Anordnung liegt die Stellschraube 25 an dem Anschlag 26 an. Der Anschlag 26 wird durch eine Fläche an dem ersten Verstellbauteil 13 gebildet. Das Innengewinde wird vorzugsweise durch eine in den Überstand 24 eingelegte Sechskantmutter realisiert.The first adjusting component 13 is, preferably, attached to the supporting structure and the second adjusting component 14 with the splitting wedge 3 is adjustable relative to the first adjusting component 13 by the adjusting mechanism 15. The adjusting mechanism 15 has a projection 24 on the second adjusting component 14, an adjusting screw 25 and a stop 26. The projection 24 protrudes into an edge-side recess 27 of the first adjustment component 13. The projection 24 has an internal thread which runs parallel to the plane of the saw blade 2 on. In the internal thread, the screw 25 is screwed. For easier operation, the set screw 25 is preferably designed as Allen screw. When assembled arrangement, the screw 25 abuts against the stop 26. The stop 26 is formed by a surface on the first adjustment member 13. The internal thread is preferably realized by an inserted into the supernatant 24 hex nut.

Durch Drehung der Stellschraube 25 im Uhrzeigersinn wird das zweite Verstellbauteil 14 von dem ersten Verstellbauteil 13 weg bewegt, wobei das erste Verstellbauteil 13 an der Tragkonstruktion 1 befestigt ist. Bei Drehung der Stellschraube 25 gegen den Uhrzeigersinn wird das zweite Verstellbauteil 14 durch die Rückstellkraft der Tellerfeder 23 in Richtung der Ausgangsposition zurückbewegt.By rotation of the adjusting screw 25 in a clockwise direction, the second adjusting member 14 is moved away from the first adjusting member 13, wherein the first adjusting member 13 is fixed to the supporting structure 1. When turning the Adjusting screw 25 counterclockwise, the second adjusting member 14 is moved back by the restoring force of the plate spring 23 in the direction of the starting position.

Die Verstellbauteile 13, 14 sind vorzugsweise unbearbeitete Aluminiumgußteile. Dies ermöglicht eine kostengünstige Produktion.The adjusting components 13, 14 are preferably unprocessed cast aluminum parts. This allows a cost-effective production.

Fig. 4 zeigt eine weitere Ausführung der Erfindung. Das Distanzstück 4 weist bei dieser Ausführungsform eine erste und eine zweite Lenkstange 30, 31 und einen Verstellmechanismus 15 auf. Die erste Lenkstange 30 ist an der Tragkonstruktion 1 befestigt, an der zweiten Lenkstange 31 ist der Spaltkeil 3 mit einem Befestigungselement 5 befestigt. Das Befestigungselement 5 erstreckt sich durch den Schlitz 7 des Spaltkeils 3 und ermöglicht auch die Höhenund/oder Distanzverstellung des Spaltkeils 3 relativ zum Sägeblatt 2. Fig. 4 shows a further embodiment of the invention. The spacer 4 has in this embodiment, a first and a second handlebar 30, 31 and an adjusting mechanism 15. The first handlebar 30 is fixed to the support structure 1, on the second handlebar 31 of the riving knife 3 is fixed with a fastener 5. The fastening element 5 extends through the slot 7 of the splitting wedge 3 and also allows the height and / or distance adjustment of the splitting wedge 3 relative to the saw blade 2.

Die Lenkstangen 30, 31 sind durch ein oder zwei Verbindungsstangen 32, 33 miteinander verbunden. Die Lenkstangen 30, 31 bilden zusammen mit den Verbindungsstangen 32, 33 ein Parallelogramm. Der Verstellmechanismus 15 ist an der zweiten Lenkstange 31 angebracht. Der Verstellmechanismus 15 weist eine Stellschraube 25, vorzugsweise eine Inbusschraube, und ein Innengewinde 28 senkrecht zur Ebene des Sägeblattes 2 auf. Die Stellschraube 25 ist in das Innengewinde 28 einschraubbar. In zusammengesetztem Zustand liegt die Stellschraube 25 an einem Anschlag 26 an der ersten Lenkstange 31 an. Durch Drehung der Stellschraube 25 im Uhrzeigersinn werden die Lenkstangen 30, 31 parallel zueinander verschoben. Bei Drehung der Stellschraube 25 gegen den Uhrzeigersinn ist eine Rückstellkraft erforderlich, die die Verschiebung der zwei Lenkstangen 30, 31 relativ zueinander realisiert. Die Rückstellkraft wird, vorzugsweise, durch eine Zugfeder 34, die zwischen den zwei Lenkstangen 30, 31 angeordnet ist, bereitgestellt.The handlebars 30, 31 are interconnected by one or two connecting rods 32, 33. The handlebars 30, 31 together with the connecting rods 32, 33 a parallelogram. The adjusting mechanism 15 is attached to the second handlebar 31. The adjusting mechanism 15 has an adjusting screw 25, preferably an Allen screw, and an internal thread 28 perpendicular to the plane of the saw blade 2. The adjusting screw 25 can be screwed into the internal thread 28. In the assembled state, the adjusting screw 25 bears against a stop 26 on the first handlebar 31. By turning the screw 25 in a clockwise direction, the handlebars 30, 31 are moved parallel to each other. Upon rotation of the screw 25 counterclockwise a restoring force is required, which realizes the displacement of the two handlebars 30, 31 relative to each other. The restoring force is, preferably, provided by a tension spring 34 which is arranged between the two steering rods 30, 31.

Es wird darauf hingewiesen, daß hier lediglich Ausführungsbeispiele beschrieben sind. Selbstverständlich sind Variationen möglich. Insbesondere können die Verstellbauteile 13, 14 ebenso wie die Längsstangen 30, 31 ihre Funktionen tauschen.It should be noted that only exemplary embodiments are described here. Of course, variations are possible. In particular, the adjusting components 13, 14 as well as the longitudinal rods 30, 31 exchange their functions.

Claims (15)

  1. Circular saw having a saw blade (2) rotatably mounted on a supporting structure (1) and a splitting wedge (3) adjustable relative to the saw blade (2), the splitting wedge (3) being fastened to a spacer element (4) and being adjustable relative to the supporting structure (1) by means of the spacer element (4) parallel to itself into the plane of the saw blade (2),
    characterized
    in that the spacer element (4) has a first and a second adjusting component (13, 14) and an adjusting mechanism (15),
    in that the adjusting components (13, 14) have inclined planes (16, 17) and are arranged with the inclined planes (16, 17) one against the other and are mutually displaceable, and
    in that the parallel adjustment of the splitting wedge (3) is realized by the displacement of the inclined planes (16, 17) relative to one another.
  2. Circular saw according to Claim 1, characterized in that the inclined planes (16, 17) have a plurality of jags (18, 19, 20), such an angle being able to be predefined that, upon a slight mutual displacement of the two inclined planes (16, 17), a discernible parallel offset of the splitting wedge (3) already exists.
  3. Circular saw according to Claim 1 or 2, characterized in that the adjusting components (13, 14) respectively have a cutout (21, 22) and are held together by means of a fastening element (5), which runs through the cutouts (21, 22).
  4. Circular saw according to one of Claims 1 to 3, characterized in that the adjusting components (13, 14) are pressed one against the other by means of a restoring force as long as there is no counterforce at play, the restoring force preferably being generated by means of a disc spring (23) on the fastening element (5).
  5. Circular saw according to one of Claims 1 to 4, characterized in that the adjusting mechanism (15) has a set screw (25), preferably a hexagon socket screw, which bears against a stop (26) of the first adjusting component (13) and is screwed into an internal thread in the second adjusting component (14), the internal thread preferably being realized by a hexagon nut inserted into the second adjusting component (14).
  6. Circular saw according to one of Claims 1 to 5, characterized in that the adjusting components (13, 14) are raw aluminium castings.
  7. Circular saw having a saw blade (2) rotatably mounted on a supporting structure (1) and a splitting wedge (3) adjustable relative to the saw blade (2), the splitting wedge (3) being fastened to a spacer element (4) and being adjustable by means of the spacer element (4) relative to the supporting structure (1) parallel to itself into the plane of the saw blade (2), characterized in that the spacer element (4) has a first and a second steering rod (30, 31), at least one connecting rod (32, 33) and an adjusting mechanism (15), in that the steering rods (30, 31) are connected by means of the connecting rod(s) (32, 33), and in that the parallel adjustment of the splitting wedge (3) is realized by an adjustment of the steering rods (30, 31) relative to one another.
  8. Circular saw according to Claim 7, characterized in that the first steering rod (30) is attached to the supporting structure (1), and in that the splitting wedge (3) is fastened to the second steering rod (31) by means of a fastening element (5).
  9. Circular saw according to Claim 7 or 8, characterized in that the adjusting mechanism (15) is fastened to one of steering rods (30, 31), preferably to the second steering rod (31), and/or in that the adjusting mechanism (15) has a set screw (25), preferably a hexagon socket screw, which bears against a stop (26) on the first steering rod (30) and is screwed into an internal thread (28) in the second steering rod (31).
  10. Circular saw according to one of Claims 7 to 9, characterized in that the steering rods (30, 31) are pressed one against the other by means of a restoring force as long as there is no counterforce at play, the restoring force preferably being generated by means of a tension spring (34) between the steering rods (30, 31), the tension spring (34) preferably being disposed between the steering rods (30, 31) around the set screw (25).
  11. Circular saw according to one of Claims 7 to 10, characterized in that the steering rods (30, 31), given the maximum possible offset of the splitting wedge (3), stand opposite each other in parallel.
  12. Circular saw according to one of Claims 1 to 11, characterized in that the splitting wedge (3) is fastened to the spacer element (4) in a holding position by means of a fastening element (5), the fastening element (5) preferably having a combination of a screw and a nut.
  13. Circular saw according to Claim 12, characterized in that the splitting wedge (3) has a preferably arcuate slot (7) through which the fastening element (5) runs, so that, through alteration of the holding position, a height and distance adjustment of the splitting wedge (3) relative to the saw blade (2) is possible, wherein, preferably, the spacer element (4) has two lugs (8, 9), the lugs (8, 9), in the assembled state, jut into the slot (7) of the splitting wedge (3), and a fastening plate (10) having cutouts (11, 12) for the lugs (8, 9), in the assembled state, is arranged so as to press against the splitting wedge (3) from the side opposite the lugs (8, 9).
  14. Circular saw according to one of Claims 1 to 13, characterized in that the circular saw is a bench saw.
  15. Circular saw according to one of Claims 1 to 13, characterized in that the circular saw is a portable circular saw.
EP04009771A 2003-10-10 2004-04-24 Circular saw with riving knife Expired - Lifetime EP1522394B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10347915A DE10347915B3 (en) 2003-10-10 2003-10-10 Circular saw used as a hand-held or bench circular saw comprises a spacer having adjusting components with steep planes that are arranged against each other, and an adjusting mechanism
DE10347915 2003-10-10

Publications (3)

Publication Number Publication Date
EP1522394A2 EP1522394A2 (en) 2005-04-13
EP1522394A3 EP1522394A3 (en) 2007-01-10
EP1522394B1 true EP1522394B1 (en) 2008-07-30

Family

ID=33483137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04009771A Expired - Lifetime EP1522394B1 (en) 2003-10-10 2004-04-24 Circular saw with riving knife

Country Status (3)

Country Link
EP (1) EP1522394B1 (en)
AT (1) ATE402796T1 (en)
DE (2) DE10347915B3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101450399B (en) * 2007-12-06 2010-08-25 张理政 Saw cutting device with protection structure
EP3191272A4 (en) * 2014-09-09 2018-02-07 Robert Bosch GmbH Table saw riving knife mounting arrangement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH214230A (en) * 1940-04-18 1941-04-15 Mey Kg Maschf Mafell Circular saw.
DE917746C (en) * 1940-09-12 1954-09-09 Leona Pflaumer Geb Steuer Device for holding the riving knife of a circular saw
GB2273078A (en) * 1992-12-04 1994-06-08 Black & Decker Inc Adjustable riving knife

Also Published As

Publication number Publication date
EP1522394A2 (en) 2005-04-13
DE502004007718D1 (en) 2008-09-11
DE10347915B3 (en) 2004-12-23
EP1522394A3 (en) 2007-01-10
ATE402796T1 (en) 2008-08-15

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