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WO1993001922A1 - Scie circulaire manuelle et procede de sciage - Google Patents

Scie circulaire manuelle et procede de sciage Download PDF

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Publication number
WO1993001922A1
WO1993001922A1 PCT/DE1992/000580 DE9200580W WO9301922A1 WO 1993001922 A1 WO1993001922 A1 WO 1993001922A1 DE 9200580 W DE9200580 W DE 9200580W WO 9301922 A1 WO9301922 A1 WO 9301922A1
Authority
WO
WIPO (PCT)
Prior art keywords
saw
hand
base plate
circular saw
held circular
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.)
Ceased
Application number
PCT/DE1992/000580
Other languages
German (de)
English (en)
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO1993001922A1 publication Critical patent/WO1993001922A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B9/00—Portable power-driven circular saws for manual operation
    • B27B9/02—Arrangements for adjusting the cutting depth or the amount of tilting
    • 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
    • B27G19/04—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws for manually-operated power-driven circular saws

Definitions

  • the invention refers to a circular saw and a sawing method according to the preamble of claims 1 and 6.
  • FIG. 1 refers to a circular saw and a sawing method according to the preamble of claims 1 and 6.
  • a generic circular saw is known from US Pat. No. 3 » 730,239. It has a pendulum protection hood that opens against a spring force and can be pivoted vertically around a pivot joint used by the operator on its base plate to change the depth of cut.
  • the saw is, as usual, provided for leading away from the operator feed is wohei started saws always piece to an outer edge of Werk ⁇ ". Since the pendulum protection hood is opened so far that the saw teeth can attack the workpiece. As the feed continues, the pendulum guard hood opens completely by itself.
  • the saw mentioned is not provided with a riving knife, which is not admissible in terms of safety in Europe, but is of no importance for the invention.
  • Such a plunge-cut saw is known from DE-OS 3912307, in which the fulcrum for depth adjustment lies on the area of the base plate that is to be operated by the operator and in which the saw blade is pivoted out of a fixed housing.
  • spring means act on the plunge-cut saw with respect to the base plate in such a way that they seek to maintain the top dead center position, ie the plunge depth zero, in which a mechanism releasably locks the zero position.
  • the circular saw according to the invention with the features of claim 1 has the advantage that the use of these known hand-held circular saws, which is limited only to cuts made over the workpiece, is expanded by simple technical means to make plunge cuts in synchronism with incredibly good handling safety, and that safety and the advantages of the known plunge saws could be exceeded. This creates a new type of saw uniting two saw concepts that overcomes previous prejudices. Further advantageous embodiments of the invention are given by the features contained in the dependent claims.
  • FIG. 1 shows a perspective view of a circular saw according to the invention
  • FIG. 2 shows a side view of the circular saw with the greatest depth of cut set
  • FIG. 3 shows the side view of the exemplary embodiment according to FIG. 2 with the smallest depth of cut set. Description of the embodiment
  • the hand-held circular saw 1 shown in FIG. 1 has a pendulum guard 2 and a housing 3 with a handle "and a drive that is not visible. This is coupled to a saw shaft 7 with a saw blade 10 fastened thereon by means of a screw 8 with washer 9.
  • the housing 3 is vertical adjustable in height and pivotable, an axis 15 is mounted in a joint 13 nm and is fastened to a base plate 17.
  • a cutting depth guide ruler 19 is also fastened on the base plate 17.
  • the rear region of the housing 3 is guided thereon on the side opposite the joint 13 so that it can be locked. Any position of the hand-held circular saw 1 on the cutting depth guide ruler 19 can be determined by means of locking means 2, 25, in particular in the form of a screw-nut connection, between the top and bottom dead center.
  • the hand-held circular saw 1 has an additional handle 27 attached to the housing 3 near the joint 13.
  • cuts can be made over the workpiece by, as usual, pre-opening the pendulum protection hood 2 to such an extent that the saw teeth 11 can enter the workpiece in order to then start and saw the drive in a known manner.
  • Plunge cuts can also be made with the hand-held circular saw 1 by placing it on a workpiece with the base plate 17, the saw blade 10 being positioned in the outermost position above the base plate 17. After the drive has been started, the circular saw 1 is held with both hands on the handles 5-27 and the rotating saw blade 10, cutting in synchronism, is lowered substantially vertically into the workpiece to a preselected depth of cut.
  • the very short phase of the synchronous movement which changes into the opposite direction at almost the greatest depth of cut, can be better managed by the special arrangement of the handles than the opposite direction when diving with conventional plunge-cut saws.
  • miter cuts can also be produced as a plunge cut or guided over a workpiece in that the housing 3 is pivoted with respect to the base plate 17 "about an axis parallel to the feed direction or to the cutting line of sight.
  • the miter plunge cut which is seldom used, is used with the base plate 17 firmly connected, not shown, the second additional handle for better guidance and holding stability.
  • the locking means 21 is released so that the operator 5 holds the handle 5, the housing 3 with drive and saw blade 10 can be freely moved up and down relative to the base plate 13.
  • the greatest depth of cut is always smaller than the radius of the saw blade 10, because it cannot dip deeper into the workpiece than to the saw shaft 7 or to the washer 9.
  • FIG. 2 The side view of the circular saw 1 shown in FIG. 2 shows the arrangement of the depth-of-cut guide 19, the locking means 21 and the joint 13 as well as the compression spring 23 and the first additional handle 27 in their spatial assignment with the greatest set depth of cut.
  • a resilient riving knife 28 not shown in detail, can be seen, as is known for example from DE-OS 21 33308, Fig. 8.
  • FIG. 3 shows the hand-held circular saw 1 at the greatest distance from the saw teeth 11 from the base plate 17.
  • the depth of cut guide ruler 19 limits the stroke of the hand-held circular saw 1 above the base plate 17.
  • a longitudinal slot in the depth of cut guide ruler 19 is a bolt 25 ge, which is fixed to the housing 3 and forms a straight guide together with the cutting depth guide 19.
  • the Druckfe ⁇ the 23 between the housing 3 "and the base plate 17 seeks this to push the two parts apart, so that although the immersion movement is made slightly more difficult, the exchange movement is facilitated.
  • the compression area 23 keeps the lower region of the saw blade 10 significantly higher than 3 mm, approximately 10 mm high, above the base plate 17.
  • the circular saw 1 can be pivoted transversely to the feed direction via a pivot axis 30, 3, the inclined position being lockable via clamping means 33.
  • an additional handle 27 in the vicinity of the joint 13 » so that the hand-held circular saw 1 forms a two-armed, rocker-like lever in the hands of the operator, the two-hand operation is particularly advantageously solved, in particular for plunge cuts: the operator can, comparable to the distribution of arm strength Control the plunge movement of the hand-held circular saw 1 on the vehicle steering wheel, with both hands at the same time using its body weight.
  • the immersion movement can thus be delayed, delicately dosed, for example by pressing the saw blade 10 down with the right hand on the handle 5, but at the same time counteracting the immersion movement with the left hand on the handle 27.
  • This enables a particularly well-controlled and safe cut, in which the saw 1 is pressed securely and firmly onto the workpiece at the same time.
  • a second additional handle is attached to the base plate, so that the miter saw can be held and guided securely with miter plunge cuts.
  • the base plate is designed to rest or guide on a guide rail.
  • their pendulum protection hood is designed in such a way that it can be opened by hand using a mechanism in the vicinity of one of the handles.

Landscapes

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

Abstract

Une scie circulaire manuelle utile pour effectuer des coupes en plongée comprend une lame de scie (10) pourvue de dents de scie (11) protégée par un boîtier (3), par un capot protecteur (2) anti-vibration et par un couteau diviseur, notamment sollicité par un ressort, ainsi qu'au moins une poignée (5), un réglage de la profondeur de coupe délimité par des points morts supérieur et inférieur et une plaque de base (17). Au point mort supérieur, les dents de scie (11) s'étendent sur au maximum 3 mm au-dessus de la face inférieure de la plaque de base (17), qui peut notamment être guidée sur un rail de guidage susceptible d'être posé sur une pièce et qui peut pivoter par rapport à la lame (10) de la scie autour d'un axe parallèle à la ligne de coupe visée , ce qui permet d'effectuer des coupes obliques ou en onglet. Une telle scie est améliorée de sorte qu'au point mort supérieur du réglage de la profondeur de la coupe l'écartement entre les dents de scie inférieures (11) et la plaque de base (17) soit sensiblement supérieur à 3 mm, de préférence supérieur à 10 mm. Des ressorts (23) tendent à maintenir cet écartement. Cette scie circulaire manuelle (1) permet d'effectuer des coupes en plongée, de sorte que l'on peut renoncer de manière très avantageuse à utiliser les scies en plongée spécialisées pour ce genre de sciage.
PCT/DE1992/000580 1991-07-22 1992-07-15 Scie circulaire manuelle et procede de sciage Ceased WO1993001922A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914124234 DE4124234A1 (de) 1991-07-22 1991-07-22 Handkreissaege und saegeverfahren
DEP4124234.3 1991-07-22

Publications (1)

Publication Number Publication Date
WO1993001922A1 true WO1993001922A1 (fr) 1993-02-04

Family

ID=6436725

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1992/000580 Ceased WO1993001922A1 (fr) 1991-07-22 1992-07-15 Scie circulaire manuelle et procede de sciage

Country Status (2)

Country Link
DE (1) DE4124234A1 (fr)
WO (1) WO1993001922A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102114555A (zh) * 2010-01-04 2011-07-06 泉峰(中国)贸易有限公司 电动工具
CN103429404A (zh) * 2011-03-03 2013-12-04 罗伯特·博世有限公司 工具机系统
CN113172707A (zh) * 2020-06-24 2021-07-27 浙江金一电动工具有限公司 一种地板锯的锯片拆装装置
CN113183247A (zh) * 2020-06-24 2021-07-30 浙江金一电动工具有限公司 一种省力安全性高的地板锯
WO2021260001A1 (fr) * 2020-06-25 2021-12-30 Festool Gmbh Scies circulaires à ensembles pivots et mécanismes de sollicitation de pivot
US12083613B2 (en) 2022-10-18 2024-09-10 Techtronic Cordless Gp Track saw including plunge lockout mechanism
US12263615B2 (en) 2020-11-23 2025-04-01 Milwaukee Electric Tool Corporation Circular saw
US12465982B2 (en) 2022-02-24 2025-11-11 Techtronic Cordless Gp Track saw including plunge lockout mechanism

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1768813A2 (fr) * 2004-05-28 2007-04-04 Scientific Molding Corporation Ltd. Scie circulaire
DE102015101908A1 (de) * 2015-02-10 2016-08-11 Festool Gmbh Hand-Trennmaschine mit einer Rückstell-Federeinrichtung
US10792836B2 (en) * 2016-09-15 2020-10-06 Nanjing Chervon Industry Co., Ltd. Concrete cutter with depth setting and retention system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1830579A (en) * 1930-01-30 1931-11-03 Wappat Inc Electric handsaw
US1850444A (en) * 1930-09-17 1932-03-22 Stanley Works Portable motor driven saw
DE2133308A1 (de) * 1971-07-05 1973-01-18 Lutz Kg Maschf Eugen Elektrische handkreissaege
GB2059338A (en) * 1979-09-19 1981-04-23 Albery W A saw
US4856394A (en) * 1988-04-14 1989-08-15 Porter-Cable Corporation Portable circular saw
DE3912307A1 (de) * 1989-04-14 1990-10-25 Metabowerke Kg Kreissaege mit spaltkeil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3730239A (en) * 1971-12-10 1973-05-01 Skil Corp Circular saw with improved movable guard construction
DE3740200A1 (de) * 1987-11-27 1989-06-08 Black & Decker Inc Tragbare, motorgetriebene kreissaege
DE3815245A1 (de) * 1988-05-05 1989-11-16 Bosch Gmbh Robert Sicherheitseinrichtung an einer handwerkzeugmaschine
JPH0737782Y2 (ja) * 1989-12-15 1995-08-30 日立工機株式会社 電気丸鋸のベース傾斜機構

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1830579A (en) * 1930-01-30 1931-11-03 Wappat Inc Electric handsaw
US1850444A (en) * 1930-09-17 1932-03-22 Stanley Works Portable motor driven saw
DE2133308A1 (de) * 1971-07-05 1973-01-18 Lutz Kg Maschf Eugen Elektrische handkreissaege
GB2059338A (en) * 1979-09-19 1981-04-23 Albery W A saw
US4856394A (en) * 1988-04-14 1989-08-15 Porter-Cable Corporation Portable circular saw
DE3912307A1 (de) * 1989-04-14 1990-10-25 Metabowerke Kg Kreissaege mit spaltkeil

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102114555A (zh) * 2010-01-04 2011-07-06 泉峰(中国)贸易有限公司 电动工具
GB2476713A (en) * 2010-01-04 2011-07-06 Chervon Ltd Power tool with push and insert modes
GB2476713B (en) * 2010-01-04 2014-09-17 Chervon Ltd A power tool
CN103429404A (zh) * 2011-03-03 2013-12-04 罗伯特·博世有限公司 工具机系统
US9457489B2 (en) 2011-03-03 2016-10-04 Robert Bosch Gmbh Machine tool system
CN113172707A (zh) * 2020-06-24 2021-07-27 浙江金一电动工具有限公司 一种地板锯的锯片拆装装置
CN113183247A (zh) * 2020-06-24 2021-07-30 浙江金一电动工具有限公司 一种省力安全性高的地板锯
WO2021260001A1 (fr) * 2020-06-25 2021-12-30 Festool Gmbh Scies circulaires à ensembles pivots et mécanismes de sollicitation de pivot
US12420445B2 (en) 2020-06-25 2025-09-23 Festool Gmbh Circular saws with pivot assemblies and pivot bias mechanisms
US12263615B2 (en) 2020-11-23 2025-04-01 Milwaukee Electric Tool Corporation Circular saw
US12465982B2 (en) 2022-02-24 2025-11-11 Techtronic Cordless Gp Track saw including plunge lockout mechanism
US12083613B2 (en) 2022-10-18 2024-09-10 Techtronic Cordless Gp Track saw including plunge lockout mechanism

Also Published As

Publication number Publication date
DE4124234A1 (de) 1993-01-28

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