EP0450400A1 - Sägeeinrichtung mit Pendelschutzhaube am Sägeaggregat - Google Patents

Sägeeinrichtung mit Pendelschutzhaube am Sägeaggregat Download PDF

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Publication number
EP0450400A1
EP0450400A1 EP91104321A EP91104321A EP0450400A1 EP 0450400 A1 EP0450400 A1 EP 0450400A1 EP 91104321 A EP91104321 A EP 91104321A EP 91104321 A EP91104321 A EP 91104321A EP 0450400 A1 EP0450400 A1 EP 0450400A1
Authority
EP
European Patent Office
Prior art keywords
saw
actuating lever
catch
latch
sawing 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.)
Withdrawn
Application number
EP91104321A
Other languages
German (de)
English (en)
French (fr)
Inventor
Gerd Hempelmann
Jürgen Hempelmann
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.)
Elektra Beckum AG
Elektra Beckum Lubitz and Co
Original Assignee
Elektra Beckum AG
Elektra Beckum Lubitz and Co
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 Elektra Beckum AG, Elektra Beckum Lubitz and Co filed Critical Elektra Beckum AG
Publication of EP0450400A1 publication Critical patent/EP0450400A1/de
Withdrawn legal-status Critical Current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
    • B27G19/02—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 sawing device according to the preamble of claim 1.
  • Sawing devices of the type in question have been known for a long time, namely cross-cut and miter saws which have a fixed saw table ("Safety rules for miter cross-cut saws” Holz-Berufsvanenschaft ZH 1 / 3.6, edition 4. 1980) , or also cross-cut, miter and table circular saws which have a reversible saw table (DE-B 1 628 992).
  • sawing devices of this type must be set up in such a way that the saw unit automatically returns to the rest position after the cut, that is to say to the position with the saw unit pivoted up, and is held there automatically.
  • a latch is regularly provided, which is usually pivotally attached to the support frame and can be moved by the actuating lever.
  • the pawl is assigned to a fixed catch on a part connected to the saw table and not pivotable, namely on the non-pivoting part of the pivot bearing, into which the catch pawl engages under spring force or under its own weight when the saw unit is at rest.
  • the latch is actuated by pulling or pressing the actuating lever without releasing the handle.
  • the operating lever is moved relative to the handle, usually pivoted, and this movement is transmitted to the latch so that it is lifted out of the catch.
  • the saw blade of the saw unit is protected on the underside by a pendulum protective hood which is forcibly controlled via a lever linkage or likewise by the actuating lever.
  • a pendulum protective hood which is forcibly controlled via a lever linkage or likewise by the actuating lever.
  • it is forcibly pivoted open when the saw unit is lowered.
  • the pendulum guard hood is pivoted open by actuating the actuating lever, it is pivoted open by pulling the actuating lever (cf. the "Safety rules for miter sawing machines" mentioned above).
  • the swivel mounting of the saw unit can be a single-arm swivel mounting known per se, but that a parallelogram guide can also be implemented to the extent that the protective hood is affected.
  • the object of the invention is to provide a sawing device of the type in question which is still improved in terms of safety.
  • the sawing device shown in the single figure is shown here using the example of a cross-cut and miter saw; the explanation applies correspondingly to other saws with pivotable sawing units and pendulum protection hoods.
  • the sawing device shown initially has a flat saw table 1, preferably having an immersion slot.
  • a pivot bearing 2 is arranged at the edge of the saw table 1. This can be a one-armed swivel bearing or a parallelogram-like swivel bearing. In the illustrated embodiment, the pivot bearing 2 is configured in the manner of a parallelogram.
  • a saw unit 3 On the swivel bearing 2, a saw unit 3 is mounted, which can be swiveled by means of the swivel bearing 2 relative to the saw table 1 in an inclined manner to the saw table 1, here in a vertical plane between a swung-down saw position and a swiveled-up rest position.
  • the rest figure is shown in the single figure.
  • the saw unit 3 has a support frame 4, which is only indicated schematically and which of course has different parts, profiles and struts. Furthermore, the saw unit 3 comprises a drive motor 5, a saw blade 6, a fixed protective cover 7 covering the saw blade 6 in the upper part, a shaft 8 for the saw blade 6 and a pivotally mounted pivotally to the saw blade 6, here on the shaft 8 of the saw blade 6 Swivel-mounted protective hood 9.
  • a handle 10 Associated with the protective hood 7 and in the present exemplary embodiment attached to the supporting frame 4 is a handle 10, which is only indicated in the single figure, namely indicated by two fastening bores.
  • the handle 10 is assigned an actuating lever 11 that is movable, in particular pivotable, relative to the handle 10 - and the protective hood 7 or the support frame 4.
  • the actuating lever 11 is initially provided with a latching pawl 12 mounted on the supporting frame 4 or the associated protective hood 7 for latching the saw unit 3 connected in the rest position.
  • the latch 12 When pulling the actuating lever 11, the latch 12 is lifted out of the associated fixed detent 13.
  • the fixed catch 12 is located on the parallelogram 14.
  • the pendulum protection hood 9 is not positively controlled, but is coupled to the actuating lever 11. It is swung open by actuating (pulling) the actuating lever 11.
  • a pull cord 15 is used, which is placed near the shaft 8 concentrically around the shaft 8 and is fastened at one end to a fastening point 16 on the pendulum protective hood 9.
  • a catch 17 is arranged on the pendulum guard 9 on the side facing the actuating lever 11, that a latch 18 is assigned to the actuating lever 11, that when the pendulum guard 9 is closed and the actuating lever 11 is not pulled, the latch 18 blocking in front of the latch 17 stands and the pendulum guard 9 can not be swung open and that when the operating lever 11 is actuated (pulled) the latch 18 releases the catch 17.
  • the single figure shows the locked position of the pawl 18 in front of the catch 17 and it is immediately clear that swinging open the swinging guard 9 is not possible in this position.
  • the latch 18 can be mounted on the support frame 4 or on the protective hood 7 attached to the support frame 4. In principle, notches and latches can also be assigned the other way round.
  • the illustrated embodiment shows a further preferred design, which is characterized in that the catch 17 is arranged on the pendulum guard 9 near the shaft 8 and, preferably, is designed as a radially extending profile edge pivoting about the shaft 8.
  • the catch 17 could of course also be arranged radially further out on the pendulum protection hood 9, it could also be designed as a protruding driver, but all of these constructions have fewer advantages than the construction shown here, in particular with regard to the respectively effective lever arms and paths.
  • the actuating lever 11 is connected via a slot connection to a transmission lever which in turn engages on the latch 12.
  • the latch 18 is arranged on a lever arm 19 which is firmly coupled to the - pivotable - operating lever 11 and the lever arm 19 extends near the shaft 8 tangentially to the latter.
  • the pull cord 15 for the pendulum guard 9, which has already been explained above, can then also be attached to the end of this lever arm 19 when it is actuated by a pull cord 15.
  • the lever arm 19 acts on the end of a pivoting link 20 which is pivotally mounted on the supporting frame 4 or the protective hood 7 connected to the supporting frame 4, and that the latching pawl 12 is arranged on the deflecting link 20.
  • the deflection link 20 is pivotally mounted on a pivot axis 21.
  • the lever arm 19 has a driving pin 22 coming into contact with the deflecting link 20 and the deflecting link 20 has a control link 23 corresponding to the movement path of the driving pin 22 when pulling the actuating lever 11, so that it is ensured that the latch 12 at pulled operating lever 11 continuously releases the detent 13.
  • This explains the asymmetrical shape of the deflection link 20.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
EP91104321A 1990-03-31 1991-03-20 Sägeeinrichtung mit Pendelschutzhaube am Sägeaggregat Withdrawn EP0450400A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904010455 DE4010455A1 (de) 1990-03-31 1990-03-31 Saegeeinrichtung mit pendelschutzhaube am saegeaggregat
DE4010455 1990-03-31

Publications (1)

Publication Number Publication Date
EP0450400A1 true EP0450400A1 (de) 1991-10-09

Family

ID=6403513

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91104321A Withdrawn EP0450400A1 (de) 1990-03-31 1991-03-20 Sägeeinrichtung mit Pendelschutzhaube am Sägeaggregat

Country Status (2)

Country Link
EP (1) EP0450400A1 (enExample)
DE (1) DE4010455A1 (enExample)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0538066A1 (en) * 1991-10-18 1993-04-21 Makita Corporation Miter saw
GB2270031A (en) * 1992-08-28 1994-03-02 Black & Decker Inc A chop saw
EP0633106A1 (en) * 1993-07-08 1995-01-11 Black & Decker Inc. Chop saw arrangement
EP0633105A1 (en) * 1993-07-08 1995-01-11 Black & Decker Inc. Chop/table saw with parallelogram arrangement
EP0780194A1 (en) 1995-12-22 1997-06-25 Black & Decker Inc. A chop/table saw arrangement
EP0780181A1 (en) 1995-12-22 1997-06-25 Black & Decker Inc. A chop/saw slide
US5787779A (en) * 1993-07-08 1998-08-04 Black & Decker Inc. Chop/table saw arrangement
EP1310339A3 (en) * 1997-04-30 2003-05-21 Black & Decker Inc. Guard and control apparatuses for sliding compound saw
EP1614511A1 (en) * 2004-07-07 2006-01-11 BLACK & DECKER INC. Blade guard assembly for a saw

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9314155D0 (en) * 1993-07-08 1993-08-18 Black & Decker Inc A guard lock arrangement for a saw
US5957021A (en) * 1995-10-10 1999-09-28 Black & Decker, Inc. Guard and control apparatuses for sliding compound miter saw

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1052104B (de) * 1954-01-09 1959-03-05 Reich Maschf Gmbh Karl Handkreissaege
DE2829297A1 (de) * 1978-07-04 1980-01-17 Lutz Eugen Masch Kapp- und gehrungskreissaege
EP0131376A2 (en) * 1983-06-11 1985-01-16 Black & Decker Inc. Chop saw linkage system
US4693008A (en) * 1985-05-07 1987-09-15 Mallard Products, Incorporated Releasable separate member latching device for a portable hand tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1052104B (de) * 1954-01-09 1959-03-05 Reich Maschf Gmbh Karl Handkreissaege
DE2829297A1 (de) * 1978-07-04 1980-01-17 Lutz Eugen Masch Kapp- und gehrungskreissaege
EP0131376A2 (en) * 1983-06-11 1985-01-16 Black & Decker Inc. Chop saw linkage system
US4693008A (en) * 1985-05-07 1987-09-15 Mallard Products, Incorporated Releasable separate member latching device for a portable hand tool

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0538066A1 (en) * 1991-10-18 1993-04-21 Makita Corporation Miter saw
GB2270031A (en) * 1992-08-28 1994-03-02 Black & Decker Inc A chop saw
US5787779A (en) * 1993-07-08 1998-08-04 Black & Decker Inc. Chop/table saw arrangement
EP0633106A1 (en) * 1993-07-08 1995-01-11 Black & Decker Inc. Chop saw arrangement
EP0633105A1 (en) * 1993-07-08 1995-01-11 Black & Decker Inc. Chop/table saw with parallelogram arrangement
US5513548A (en) * 1993-07-08 1996-05-07 Black & Decker Inc. Chop/table saw with parallelogram arrangement
US5638731A (en) * 1993-07-08 1997-06-17 Black & Decker Inc. Chop saw arrangement
EP0780194A1 (en) 1995-12-22 1997-06-25 Black & Decker Inc. A chop/table saw arrangement
EP0780181A1 (en) 1995-12-22 1997-06-25 Black & Decker Inc. A chop/saw slide
EP1310339A3 (en) * 1997-04-30 2003-05-21 Black & Decker Inc. Guard and control apparatuses for sliding compound saw
EP1593471A1 (en) * 1997-04-30 2005-11-09 BLACK & DECKER INC. Guard and control apparatus for sliding compound miter saw
EP1614511A1 (en) * 2004-07-07 2006-01-11 BLACK & DECKER INC. Blade guard assembly for a saw
CN100553837C (zh) * 2004-07-07 2009-10-28 布莱克和戴克公司 电动工具
AU2005202871B2 (en) * 2004-07-07 2010-05-27 Black & Decker, Inc. Blade guard assembly for saws

Also Published As

Publication number Publication date
DE4010455C2 (enExample) 1992-01-09
DE4010455A1 (de) 1991-10-02

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