EP0012404A1 - Scie circulaire à couteau diviseur - Google Patents

Scie circulaire à couteau diviseur Download PDF

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Publication number
EP0012404A1
EP0012404A1 EP79105023A EP79105023A EP0012404A1 EP 0012404 A1 EP0012404 A1 EP 0012404A1 EP 79105023 A EP79105023 A EP 79105023A EP 79105023 A EP79105023 A EP 79105023A EP 0012404 A1 EP0012404 A1 EP 0012404A1
Authority
EP
European Patent Office
Prior art keywords
riving knife
circular saw
riving
saw blade
tracking device
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
EP79105023A
Other languages
German (de)
English (en)
Other versions
EP0012404B1 (fr
Inventor
Adolf Zaiser
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.)
Karl M Reich Maschinenfabrik GmbH
Original Assignee
Karl M Reich Maschinenfabrik 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 Karl M Reich Maschinenfabrik GmbH filed Critical Karl M Reich Maschinenfabrik GmbH
Priority to AT79105023T priority Critical patent/ATE3382T1/de
Publication of EP0012404A1 publication Critical patent/EP0012404A1/fr
Application granted granted Critical
Publication of EP0012404B1 publication Critical patent/EP0012404B1/fr
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a circular saw with a riving knife, a support plate and a saw blade that is adjustable relative to the support surface for changing the cutting depth.
  • the riving knife In the case of circular saws, it is known and prescribed to arrange the riving knife so that it does not change its position relative to the saw blade and to the highest point of the saw blade above the contact surface when the cutting height is adjusted. If the cutting height is changed by moving the saw housing with the saw blade vertically against the support plate, then the riving knife is firmly connected to the motor housing in known circular saws.
  • the motor housing with saw blade for adjusting the cutting height is pivotally connected to the support plate with a motor support, then a guiding device must be provided for the riving knife in a known manner, which guides the saw blade in the desired manner.
  • the riving knife must normally be used for the safety of the operator, there is occasionally a need to remove the riving knife for certain areas of application. This is the case, for example, if the saw blade is cut into plate-shaped workpieces are dipped into the workpiece from the surface. Or if you have to saw backwards on certain occasions. In these cases, the riving knife would prevent the desired working movement and must therefore be removed. When using the circular saw for normal sawing work, the riving knife would have to be reattached. However, this is often forgotten or omitted for convenience so that the operator can be seriously endangered and injured by kickback workpieces.
  • the object of the present invention is to arrange the riving knife on a circular saw in such a way that it is also possible for the saw blade to be immersed in the workpiece or to be sawed backwards without the riving knife having to be removed.
  • This object is achieved in that the riving knife is movably mounted on the circular saw above the contact surface in order to carry out a relative movement relative to the highest point of the saw blade.
  • the riving knife is thus preferably pivoted behind the supporting surface against the action of a restoring force when the saw blade is immersed in the workpiece and slides into the slot produced by the saw blade during further forward sawing. This ensures that the prescribed riving knife is available for further sawing work and thus the operator cannot be endangered.
  • the guiding device designed as a jelly corner can be provided with at least one additional degree of freedom.
  • this additional degree of freedom can be formed in that the non-driven rocker arm has a length that can be varied against a restoring force.
  • a bearing of the four-bar linkage is designed to be movable.
  • a releasable locking between the riving knife and circular saw can be provided, which prevents the free relative movement between the riving knife and the highest point of the saw blade in the locking position.
  • the lock To use such a circular saw for plunge work, the lock must be released so that the riving knife can swing back behind the platen. If the riving knife then slides into the saw slot when sawing further, it can be provided that the locking mechanism engages automatically and must be released again the next time it is immersed. It can also be provided that the riving knife without a restoring force, e.g. Spring, weight, magnetically or hydraulically adjustable by hand and locked in the end points.
  • a restoring force e.g. Spring, weight, magnetically or hydraulically adjustable by hand and locked in the end points.
  • the riving knife according to the invention can advantageously be attached to portable circular saws as well as to stationary table saws.
  • a motor housing 3 with a saw blade 4 is fastened in a vertically displaceable manner on a support plate 1 with a support surface 2.
  • a riving knife carrier 5, on which a riving knife 6 is removably attached, is pivotally mounted on the motor housing 3 concentrically to the axis 7 of the saw blade 4.
  • a stop 8 is also provided on the motor housing 3 and a tension spring 9 is provided between the stop 8 and the riving knife carrier 5, so that the riving knife carrier 5 is pulled against the stop 8 in its rest position.
  • Splitting wedge 6 assumes its position intended for normal sawing work, in which the highest point 10 of the saw blade 4 projects beyond the splitting wedge (6) by a few millimeters.
  • the riving knife 6 is pivoted back so far by the workpiece against the action of the tension spring 9 in the position shown in broken lines in FIG. 1 that the saw blade 4 can be immersed in this until the bearing surface 2 abuts the workpiece.
  • the riving knife 6 slides under the action of the tension spring 9 into the sawing gap formed by the saw blade 4 and thus performs its intended safety function.
  • FIGS. 2 to 4 schematically show circular saws with a pivotably mounted motor mount and tracking device for the riving knife, various exemplary embodiments for the movement of the riving knife according to the invention being shown.
  • the rocker arm 15 of a motor housing 16 is pivotably mounted on a bearing 13 or 14 for adjusting the cutting height of the saw blade 17.
  • a riving knife carrier 19 is pivotally mounted on the motor housing 16 concentrically to the axis 18 of the saw blade 17, on which a riving knife 20 is removably fastened. The highest point 21 of the saw blade 17 projects beyond the riving knife 20 again by a certain amount.
  • the riving knife carrier 19 is designed as an angle lever, on the carrier arm 22 of which the riving knife 20 is fastened and the other arm of which forms a coupling 23, on the joint 24 of which a rocker arm 25 (FIGS. 2) and 26 (FIGS. 4 and 5) is pivotably fastened is. Swing arms 25 and 26 are connected at their other end to the support plate 11 via joints 27, 28 and 29.
  • the imaginary connecting line between the joints 13-27, 14-28 and 13-29 form in a known manner with the driven rocker 15, the coupling 23 and the further rocker 25 and 26, a quadrilateral joint, which when swiveling the motor housing 16 to adjust the Cutting height of saw blade 17 tracks riving knife 20 so that the determined distance between highest point 21 and riving knife remains constant.
  • the rocker 25 has a sleeve 30 which is pivotally attached to the joint 27.
  • a rod 31 is slidably mounted in the sleeve 30, with a plate 32 of the rod 31 and an end wall 33 of the sleeve 30 a compression spring 34 is arranged.
  • Rod 31 is pivotally connected to the joint 24 and plate 32 is pressed in the rest position by compression spring 34 against the other end wall 35 of sleeve 30.
  • the arrangement according to the invention shown in Fig. 2 ensures the tracking of the riving knife 20 when adjusting the cutting height. If the circular saw is used for plunge sawing, then the riving knife 20 is pivoted from the surface of the workpiece against the action of the compression spring 34 into the position shown in broken lines in FIG. 2. After a sawing gap has been formed, the compression spring 34 automatically guides the riving knife 20 into this sawing gap.
  • the joint 28 is not connected to the support plate 11, but is pivotally connected to an intermediate member 36 with the bearing 14 attached to the support plate 11.
  • a tension spring 37 is fastened between the intermediate member 36 and the bracket 38 of the support plate 11 and pulls the intermediate member 36 against a stop cam 39 of the bracket 38.
  • the riving knife 20 can be pivoted when immersed in the direction of the support surface 12 and returns automatically after the formation of a sawing gap his rest position back.
  • the joint 29 is mounted in an arcuate slot 40 in a bracket 41 of the support plate 11.
  • a collar bolt 43 engages in a bore 42 of the rocker arm 26, which is slidably mounted in the slot 40 and can be clamped to the bracket 41 with a wing nut 44.
  • the additional degree of freedom can thus be eliminated by an intervention by the operator and the movement of the gap restrict the wedge to the tracking movement.
  • the wing nut 44 is loosened, the displaceable mounting of the joint 29 in the slot 40 allows the riving knife 20 to be pivoted in the direction of the support surface 12 when the saw blade 17 is immersed.
  • FIG. 6 A modification of the embodiment shown in FIG. 3 is shown in FIG. 6.
  • the bearing 14 is designed as a double joint on which both the rocker arm 15 for the motor housing 16 and the intermediate member 36 are pivotably mounted.
  • the intermediate member 36 is fastened to a bearing pin 45 which is rotatably mounted in the bracket 38 and with which a setting wheel 47 is fixedly connected with a pin 46.
  • a helical spring 48 is arranged between the adjusting wheel 47 and the bracket 38, which holds the intermediate member 36 in the rest position shown in FIG. 3 via the bearing pin 45.
  • a locking pin 50 is slidably mounted in a bore 49 of the adjusting wheel 47. It has two grooves 51, into which a spring-loaded ball 52 engages, the adjusting wheel 47 being freely rotatable in the release position of locking bolts 50 and the locking bolt 50 engaging in a locking position in a bore 53 of console 38 and thus adjusting wheel 47 with console 38 locked. In this locking position, the additional degree of freedom of riving knife 20 is canceled.
  • Fig. 7 shows the use of the riving knife according to the invention in a stationary table saw.
  • a rocker 57 of motor housing 58 with saw blade 59 is pivotally mounted on a bearing 56 again.
  • the riving knife 60 is removably attached to one arm of a riving knife carrier 61, the other arm forms a coupling 62 of a four-bar linkage which is supplemented by a rocker 63 which corresponds to the rocker 25 of FIG. 2 and is pivotably mounted on the joint 64 of the bracket 54 and the joint 65 of the coupling 62.
  • Stationary table saws are usually provided with a protective hood, which can be pivotally attached to the end of riving knife 60.
  • this protective hood must be removed.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
EP79105023A 1978-12-16 1979-12-10 Scie circulaire à couteau diviseur Expired EP0012404B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79105023T ATE3382T1 (de) 1978-12-16 1979-12-10 Kreissaege mit einem spaltkeil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2854369 1978-12-16
DE2854369A DE2854369C2 (de) 1978-12-16 1978-12-16 Kreissäge mit Spaltkeil

Publications (2)

Publication Number Publication Date
EP0012404A1 true EP0012404A1 (fr) 1980-06-25
EP0012404B1 EP0012404B1 (fr) 1983-05-18

Family

ID=6057363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79105023A Expired EP0012404B1 (fr) 1978-12-16 1979-12-10 Scie circulaire à couteau diviseur

Country Status (5)

Country Link
EP (1) EP0012404B1 (fr)
AT (1) ATE3382T1 (fr)
CA (1) CA1113837A (fr)
DE (1) DE2854369C2 (fr)
ES (1) ES486928A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521900A1 (fr) * 1982-02-23 1983-08-26 Lutz Eugen Masch Instrument de sciage utilisable en tant que scie sur table ou scie a onglet
GB2273078A (en) * 1992-12-04 1994-06-08 Black & Decker Inc Adjustable riving knife
US5381233A (en) * 1993-03-03 1995-01-10 National Tsing Hua University Polarized-light scatterometer for measuring the thickness of a film coated on the partial of a substrate
EP1787777A2 (fr) * 2005-11-21 2007-05-23 Robert Bosch Gmbh Capot de protection modulaire pour scie motorisée
WO2009083298A1 (fr) * 2007-12-21 2009-07-09 Robert Bosch Gmbh Scie circulaire
US7600456B2 (en) 2005-11-21 2009-10-13 Robert Bosch Gmbh Modular guard system for a power saw
US8127648B2 (en) 2008-07-31 2012-03-06 Robert Bosch Gmbh Table saw guard system
EP3210727A1 (fr) * 2016-02-23 2017-08-30 Eberhard Berhalter Machine outil
WO2018141512A1 (fr) * 2017-01-31 2018-08-09 Robert Bosch Gmbh Scie circulaire, en particulier scie circulaire portative
WO2021009163A1 (fr) 2019-07-16 2021-01-21 Homag Gmbh Ensemble d'usinage par formation d'une rainure ou d'une découpe de séparation, doté d'une fonction de guidage des copeaux

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3912307A1 (de) * 1989-04-14 1990-10-25 Metabowerke Kg Kreissaege mit spaltkeil
DE3933261A1 (de) * 1989-10-05 1991-04-18 Bosch Gmbh Robert Handkreissaege
DE4010456A1 (de) * 1990-03-31 1991-10-02 Elektra Beckum Lubitz & Co Saegeeinrichtung mit einer um 180(grad) wendbar gelagerten grundplatte
US5481806A (en) * 1994-06-27 1996-01-09 Pratt; Edgar L. Tongue attachment for circular saw
DE19635527A1 (de) * 1996-08-20 1998-02-26 Black & Decker Inc Tauchsäge
DE102012005165A1 (de) * 2012-03-16 2013-09-19 Festool Group Gmbh & Co. Kg Hand-Trennmaschine
DE102012005173A1 (de) * 2012-03-16 2013-09-19 Festool Group Gmbh & Co. Kg Hand-Trennmaschine
DE102012005169A1 (de) * 2012-03-16 2013-09-19 Festool Group Gmbh & Co. Kg Hand-Trennmaschine
DE102013101480A1 (de) 2013-02-14 2014-08-14 Wolfcraft Gmbh Sägetischplatte mit daran befestigbarem Spaltkeil
US12083613B2 (en) 2022-10-18 2024-09-10 Techtronic Cordless Gp Track saw including plunge lockout mechanism

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1435252A (en) * 1919-12-17 1922-11-14 John C Haswell Separating device for sawing machines
US1602040A (en) * 1925-03-05 1926-10-05 Stover Lumber Company Separating device for resawing machines
US1711490A (en) * 1927-09-12 1929-05-07 William D Drummond Saw guard
US2518684A (en) * 1949-04-21 1950-08-15 Hyman M Harris Duplex bench saw
US2530867A (en) * 1949-03-28 1950-11-21 Galanga Charles Spreaders for circular saw wood cutting machines
US2916062A (en) * 1958-09-18 1959-12-08 Dormeyer Corp Splitter for portable electric saw
FR2087454A5 (fr) * 1970-05-20 1971-12-31 Guilliet Ets

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1202964B (de) * 1957-12-19 1965-10-14 Reich Maschf Gmbh Karl Handkreissaege mit Spaltkeil
CH393716A (de) * 1959-07-24 1965-06-15 Metabowerke Kg Kreissäge mit einem dem Sägeblatt nachgeschalteten Spaltkeil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1435252A (en) * 1919-12-17 1922-11-14 John C Haswell Separating device for sawing machines
US1602040A (en) * 1925-03-05 1926-10-05 Stover Lumber Company Separating device for resawing machines
US1711490A (en) * 1927-09-12 1929-05-07 William D Drummond Saw guard
US2530867A (en) * 1949-03-28 1950-11-21 Galanga Charles Spreaders for circular saw wood cutting machines
US2518684A (en) * 1949-04-21 1950-08-15 Hyman M Harris Duplex bench saw
US2916062A (en) * 1958-09-18 1959-12-08 Dormeyer Corp Splitter for portable electric saw
FR2087454A5 (fr) * 1970-05-20 1971-12-31 Guilliet Ets

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521900A1 (fr) * 1982-02-23 1983-08-26 Lutz Eugen Masch Instrument de sciage utilisable en tant que scie sur table ou scie a onglet
GB2273078A (en) * 1992-12-04 1994-06-08 Black & Decker Inc Adjustable riving knife
US5381233A (en) * 1993-03-03 1995-01-10 National Tsing Hua University Polarized-light scatterometer for measuring the thickness of a film coated on the partial of a substrate
US7806032B2 (en) 2005-11-21 2010-10-05 Robert Bosch Gmbh Table saw guard system side barrier
CN1974094B (zh) * 2005-11-21 2012-09-19 罗伯特·博世有限公司 用于电锯的组合式防护系统
US7437981B2 (en) 2005-11-21 2008-10-21 Robert Bosch Gmbh Modular guard system and apparatus for a power saw
EP1990155A2 (fr) 2005-11-21 2008-11-12 Robert Bosch GmbH Capot de protection modulaire pour scie motorisée
EP1990155A3 (fr) * 2005-11-21 2008-11-19 Robert Bosch GmbH Capot de protection modulaire pour scie motorisée
EP1787777A3 (fr) * 2005-11-21 2007-06-27 Robert Bosch Gmbh Capot de protection modulaire pour scie motorisée
US7600456B2 (en) 2005-11-21 2009-10-13 Robert Bosch Gmbh Modular guard system for a power saw
EP1787777A2 (fr) * 2005-11-21 2007-05-23 Robert Bosch Gmbh Capot de protection modulaire pour scie motorisée
US7814818B2 (en) 2005-11-21 2010-10-19 Robert Bosch Gmbh Modular table saw guarding system riving knife release mechanisms
US8096220B2 (en) 2005-11-21 2012-01-17 Robert Bosch Gmbh Modular table saw guarding system upper guard barrier
WO2009083298A1 (fr) * 2007-12-21 2009-07-09 Robert Bosch Gmbh Scie circulaire
US9027449B2 (en) 2007-12-21 2015-05-12 Robert Bosch Gmbh Circular saw
US8127648B2 (en) 2008-07-31 2012-03-06 Robert Bosch Gmbh Table saw guard system
EP3210727A1 (fr) * 2016-02-23 2017-08-30 Eberhard Berhalter Machine outil
WO2018141512A1 (fr) * 2017-01-31 2018-08-09 Robert Bosch Gmbh Scie circulaire, en particulier scie circulaire portative
CN110234478A (zh) * 2017-01-31 2019-09-13 罗伯特·博世有限公司 圆锯，尤其是手持式圆锯
US10967537B2 (en) 2017-01-31 2021-04-06 Robert Bosch Gmbh Circular saw, in particular hand-held circular saw
CN110234478B (zh) * 2017-01-31 2022-08-02 罗伯特·博世有限公司 圆锯
WO2021009163A1 (fr) 2019-07-16 2021-01-21 Homag Gmbh Ensemble d'usinage par formation d'une rainure ou d'une découpe de séparation, doté d'une fonction de guidage des copeaux
DE102019119230A1 (de) * 2019-07-16 2021-01-21 Homag Gmbh Aggregat für Nut- und Trennschnittbearbeitung mit Späneleitfunktion

Also Published As

Publication number Publication date
DE2854369C2 (de) 1983-10-20
EP0012404B1 (fr) 1983-05-18
DE2854369A1 (de) 1980-06-19
CA1113837A (fr) 1981-12-08
ES486928A1 (es) 1980-05-16
ATE3382T1 (de) 1983-06-15

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