EP1777047A1 - Couvercle de protection - Google Patents

Couvercle de protection Download PDF

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Publication number
EP1777047A1
EP1777047A1 EP06121814A EP06121814A EP1777047A1 EP 1777047 A1 EP1777047 A1 EP 1777047A1 EP 06121814 A EP06121814 A EP 06121814A EP 06121814 A EP06121814 A EP 06121814A EP 1777047 A1 EP1777047 A1 EP 1777047A1
Authority
EP
European Patent Office
Prior art keywords
guide body
depth stop
hood
locking
depth
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
EP06121814A
Other languages
German (de)
English (en)
Other versions
EP1777047B1 (fr
Inventor
Hans-Dieter Gaul
Peter Ostermeier
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP1777047A1 publication Critical patent/EP1777047A1/fr
Application granted granted Critical
Publication of EP1777047B1 publication Critical patent/EP1777047B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • 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 relates to a covering device for a tool device for driving a circular-disk-shaped tool, such as a saw, a furrow or grinder, with a hood body, of which the tool is enclosed. Furthermore, the covering device has a guide body which can be applied to a workpiece to be machined and which is mounted pivotably on the hood body. In this case, the guide body is biased by a spring force in a first pivoting direction of the hood body away. In addition, an adjustable depth stop is provided on the cover, over which the guide body can be applied in a second pivoting direction on the hood body, which is set opposite to the first pivoting direction.
  • Such covers allow a particularly good shielding of the rotating tool during operation, since the guide body is permanently pressed against the workpiece to be machined. This gives almost complete coverage of the rotating tool and thus good protection of the operator from injury.
  • the interior of the cover is well sealed against the outside, so that a very effective dust extraction can be connected to the cover.
  • the depth stop while the pivoting of the guide body is adjustably limited in the direction of the hood body, whereby a maximum machining depth is adjustable, which corresponds to the maximum length that protrudes the tool out of the guide body.
  • a safety device of a hand tool which has a guide carriage on a protective hood.
  • the guide carriage is biased by a spring force away from the guard.
  • the guide carriage is firmly connected to a rail which projects through a housing part fixedly connected to the protective hood and to which a depth stop is adjustably held. When a predetermined cutting depth is reached, the depth stop comes into contact with the housing part in the direction of a first pivoting direction. Further, a pawl is provided, the limits the pivotability of the guide carriage in a direction opposite to the first pivot direction second pivot direction.
  • a maximum cutting depth is thus set with the depth stop abutting the housing part in the direction of the second pivoting direction of the guide carriage.
  • a maximum pivot angle in the direction of the first pivoting direction is determined by the pawl.
  • a disadvantage of the known covering device is that the operator must apply a permanent contact pressure during operation in order to overcome the spring force between the guide carriage and the protective cover. If no sufficient contact force is applied by the operator, the spring force presses the tool against the workpiece to be machined, so that a set cut or groove depth is not reached. Furthermore, no view of the tool is possible here even when applying the tool device, without a hand must be used to pivot the guide carriage, which, however, significantly increases the risk of injury.
  • the present invention has for its object to avoid the disadvantages mentioned in a covering and to maintain a set processing depth safely in operation can.
  • the object is achieved in that a fixing device is provided, via which the guide body is additionally fixable in the direction of the first pivoting direction and thus against the spring force relative to the hood body.
  • the guide body is adjustable by means of the fixing device, that is, in different positions, fixed relative to the hood body. This makes it possible to set the guide body against the spring force in a position opposite the hood body, which corresponds to the desired machining depth. In this way, the operator during operation no longer has to overcome the spring force acting between the guide body and the hood body, but merely has to apply sufficient contact pressure to hold the guide body against the workpiece while the tool is running. This makes it possible to maintain the set processing depth in operation in a comfortable manner.
  • it is possible in this way to set the guide body relative to the hood body such that there is a good view of the relevant part of the tool when attaching the tool device on the workpiece.
  • the guide body is automatically fixed by means of the fixing device when reaching a position of the guide body relative to the hood body, which corresponds to a set machining depth.
  • the guide body is pressed in operation by the spring force until reaching the position opposite the hood body, which corresponds to the maximum machining depth against the workpiece and thus ensures good protection and optimized extraction conditions.
  • the processing depth of the guide body is then set against the hood body automatically.
  • the contact pressure which the operator has to apply in order to hold the guide body to the workpiece is therefore lower since it no longer has to compensate for the additional spring force. In this way, the operator can comfortably maintain the set machining depth.
  • the fixing device has connecting means on the depth stop and counter connecting means on the hood body, between which a form-fit acting in the direction of the first pivoting direction can be produced.
  • the connecting means of the fixing device are formed on the depth stop, the connecting means are simultaneously positioned with the setting of the desired machining depth such that they can be connected to the counter-connecting means when the machining depth is reached or be connected automatically. A separate setting of the fixing device can thus be omitted.
  • the connecting means and counter-connecting means on at least one elastically mounted latching hook and a latchable by this locking edge.
  • the connecting means and counter-connecting means can be particularly easily connected in a positive manner and also separated again.
  • the at least one latching hook is provided on the depth stop, wherein the depth stop has locking means for adjustable fixing to the guide body.
  • These locking means are in an active position with counter-locking means of the guide body into engagement and are displaceable together with the latching hook against the spring force of a locking spring in a passive position. In this passive position, neither the engagement between locking means and counter locking means nor the positive connection between connecting means and counter-connecting means can be produced.
  • by pressing the depth stop its locking and the fixing device can be solved together to set a new processing depth, when they reach the definition of the guide body relative to the hood body. In this way, the desired processing depth is adjustable in a particularly comfortable way.
  • the locking spring is advantageously formed by a arranged between an underside of the depth stop and an outer side of the guide body spring element, which biases the depth stop of the guide body in the active position.
  • the depth stop and the fixing device can be moved by simple pressure on an outside of the depth stop in the passive position to cancel the determination of the guide body and / or set a new processing depth.
  • the locking spring is integrally formed with the depth stop, that is, by a formed on this flexible area formed.
  • Fig. 1 shows a covering device 2 of a hand-held electric power tool 4 in the form of a combined cutting, slitting and grinding device for mineral applications, which drives a substantially disc-shaped tool 6 in the form of a cutting or grinding wheel or a slot tool.
  • the cover device 2 has a hood body 8, which encloses the tool 6 and is fastened to the tool device 4.
  • a connecting piece 10 is formed for connecting a dust extraction 12, not shown.
  • a guide body 18 is pivotally supported on the hood body 8 via a pivot bearing, which is formed by an axis 14 of a roller 16, a guide body 18 is pivotally supported.
  • the guide body 18 is biased by a leg spring 20 in the direction of a first pivoting direction S1 of the hood body 8 away.
  • a first leg 22 of the leg spring 20 engages the hood body 8 and a second leg 24 on the guide body 18.
  • the guide body 18 has a contact surface 26 which is applied during operation to a workpiece to be machined 28. Further, a depth stop 30 is provided on the guide body 18, which is held on a, relative to the axis 14, radial outer side 32 slidably. This depth stop 30 forms a stop surface 34, which can be applied to the hood body 8 in the direction of a second pivot direction S2 of the guide body 18, which position is opposite to the first pivot direction S1.
  • the fixing device 38 has on the hood body 8 on a shaped plate 40, which forms a counter-connecting means 42 in the form of a locking edge.
  • the connecting means 36 and counter-connecting means 42 are arranged on the guide body 18 and the hood body 8 such that they automatically engage each other when the guide body 18 is moved in the second pivoting direction S2 to the hood body 8.
  • the connecting means 36 on rounded Abdrück vom 44 over which the depth stop 30 is pressed toward the outer side 32 when the connecting means 36 come into contact with the mating connection means 42.
  • the pressure in the direction of the outer side 32 takes place counter to the spring force of a locking spring 46, which is held on an underside 48 of the depth stop 30 and is supported by the outer side 32.
  • the locking spring 46 as can be seen in particular from the isolated representation of the same in Fig. 3, on a base 50 opposite fastening means 52 for engaging behind a top 54 of the depth stop 30 and spring arms 56 extending from the outside 32 of the guide body 18th pull the trigger.
  • the depth stop 30 is biased away by the locking spring 46 from the outside 32, wherein the bottom 48 is spaced in the unloaded state of the depth stop 30 to the outside 32.
  • the locking spring 46 as a separate element, the locking spring 46 may also be formed by a with the depth stop 30 integrally formed on this elastic region.
  • the guide body 18 facing locking means 58 are formed in the form of cams and ribs on the depth stop 30. These are biased by the spring force FV of the locking spring 46 in an active position shown here, in which they are engaged with complementarily arranged counter-locking means 60 of the guide body 18 in the form of cams and recesses. In this way, the depth stop 30 is fixed relative to the guide body 18.
  • the depth stop 30 abuts the hood body 8 in the second pivoting direction S2 with the stop surface 34 via the shaped metal sheet 40. At the same time engage behind the connecting means 36 while the mating connection means 42. As a result, the fixing device 38 forms a positive connection between the hood body 8 and the depth stop 30 and on this also with the guide body 18.
  • the locking means 58 can be moved together with the connecting means 36 by acting on the depth stop 30 with a pressure D, which is opposite to the spring force FV of the locking spring 46, in a passive position in which both the positive connection of the fixing device 38 as well as the engagement between the locking means 58 and counter-locking means 60 is lifted.
  • the guide body 18 can thus be freely pivoted again relative to the hood body 8.
  • the depth stop 30 can be moved along the outside 32 into another position in which it can be fixed by means of its locking means 58 by removing the pressure D at the respective new counter-locking means 60.
  • an operator can thus determine this by applying the pressure D on the depth stop 30 in a desired position on the guide body 18.
  • the guide body 18 is pivotable relative to the hood body 8 more or less in the direction of the second pivot direction S2.
  • the tool 6 in operation more or less protrude beyond the contact surface 26 addition.
  • a maximum cut or slot depth can be adjusted via the positioning of the depth stop 30.
  • the guide body 18 is now pivoted by the applied pressing force by the operator in the second pivot direction S2 until the depth stop 30 comes into contact with the hood body 8 and thus set by the depth stop 30 maximum machining depth is reached.
  • the leg spring 20 presses the guide body 18 against the workpiece 28 and thereby ensures maximum coverage of the rotating tool 6. At the same time this ensures good sealing of the cover 2 against the outside, which in turn ensures a high efficiency of the dust extraction 12.
  • the connecting means 36 automatically engage the counterconnection means 42.
  • the guide body 18 is both with respect to the first pivoting direction S1 and the second pivoting direction S2 fixed relative to the hood body 8, as shown in Fig. 4.
  • the leg spring 20 thus generates on the cover 2 no more force that would have to be compensated by the operator by additional pressing. Therefore, from the time of the positive connection of the connection means 36 with the mating connection means 42, the operator only has to hold the abutment surface 26 on the workpiece 28 in order to achieve the maximum machining depth.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
EP06121814.5A 2005-10-21 2006-10-05 Couvercle de protection Active EP1777047B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005000143A DE102005000143A1 (de) 2005-10-21 2005-10-21 Abdeckvorrichtung

Publications (2)

Publication Number Publication Date
EP1777047A1 true EP1777047A1 (fr) 2007-04-25
EP1777047B1 EP1777047B1 (fr) 2013-11-20

Family

ID=37667160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06121814.5A Active EP1777047B1 (fr) 2005-10-21 2006-10-05 Couvercle de protection

Country Status (5)

Country Link
US (1) US7300339B2 (fr)
EP (1) EP1777047B1 (fr)
JP (1) JP2007111853A (fr)
CN (1) CN1951629A (fr)
DE (1) DE102005000143A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2020280A2 (fr) 2007-07-30 2009-02-04 HILTI Aktiengesellschaft Dispositif de recouvrement d'une machine-outil
WO2013072106A1 (fr) * 2011-11-15 2013-05-23 Robert Bosch Gmbh Dispositif de limitation d'une profondeur de coupe
WO2016128232A1 (fr) * 2015-02-10 2016-08-18 Festool Gmbh Machine à tronçonner à main pourvue d'un dispositif de réglage de profondeur

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8181350B1 (en) * 2007-05-11 2012-05-22 Francois C Morin Precision cutting system
DE102008022294A1 (de) * 2008-04-28 2009-10-29 C. & E. Fein Gmbh Schutzhaube für ein Schleifgerät
US8721400B2 (en) * 2010-03-24 2014-05-13 James-Roy Ouellette Sanding and grinding tool having depth guide
US8747190B2 (en) * 2010-04-08 2014-06-10 Mark Smith Tool for removing grout, mortar and the like
DE102010053424B4 (de) * 2010-11-29 2015-06-03 C. & E. Fein Gmbh Schleifgerät mit Staubabsaugung
US8480457B2 (en) * 2010-12-16 2013-07-09 Robert Kundel, JR. Surface preparation apparatus
CN102091876A (zh) * 2010-12-24 2011-06-15 深圳市大族激光科技股份有限公司 一种防护门装置
JP5190106B2 (ja) 2010-12-24 2013-04-24 コマツＮｔｃ株式会社 研削盤の飛散防止構造
CA3027394C (fr) * 2011-01-18 2020-07-21 Husqvarna Ab Ensemble de coupe et de collecte de poussiere ou de boue et machine-outil
CN102744458B (zh) * 2011-04-22 2016-03-02 博世电动工具（中国）有限公司 便携式切割工具
JP5774383B2 (ja) 2011-06-16 2015-09-09 株式会社マキタ 切断機用カバー装置及び切断機用カバー装置を装着した切断機
US9044869B2 (en) * 2012-02-06 2015-06-02 Chervon (Hk) Limited Electric circular saw
US9009982B1 (en) * 2012-03-29 2015-04-21 Simon J. Sedgwick Dustless drywall cutting tool
CN103737099A (zh) * 2013-12-24 2014-04-23 苏州欢颜电气有限公司 一种切割机
CN103962964A (zh) * 2014-05-12 2014-08-06 苏州天脉导热科技有限公司 一种防护装置
CN104369080B (zh) * 2014-11-27 2017-01-11 四川省什邡市鑫源管件有限公司 一种具有防止火星飞溅功能的型材切割机
US11072052B2 (en) * 2015-04-13 2021-07-27 Black & Decker Inc. Guard assembly for a power tool
JP6431445B2 (ja) * 2015-06-18 2018-11-28 株式会社マキタ 切断機の集塵カバー
JP6431446B2 (ja) * 2015-06-18 2018-11-28 株式会社マキタ 切断機の集塵カバー
US10173345B2 (en) 2015-06-18 2019-01-08 Makita Corporation Dust collection cover for cutting devices
JP6704787B2 (ja) * 2015-06-18 2020-06-03 株式会社マキタ 切断機の集塵カバー
JP6007457B1 (ja) * 2015-10-24 2016-10-12 株式会社ナカヤ 粉塵制御機能付電動切断機
CN110382164B (zh) * 2016-11-16 2021-12-21 易维佳知识产权控股有限公司 抽吸装置
DE102017129741A1 (de) * 2017-12-13 2019-06-13 Metabowerke Gmbh Abdeckvorrichtung für ein rotierendes Werkzeug
CN108854373A (zh) * 2018-04-27 2018-11-23 武汉理工大学 一种用于建筑材料切割的粉尘吸收与降噪装置
USD908149S1 (en) 2018-10-23 2021-01-19 Dustless Depot Llc Angle grinder dust shroud with variable position slots for mounting brackets
US11123839B2 (en) 2018-10-23 2021-09-21 Dustless Depot Llc Grinder dust shroud with input shaft gasket and adjustable mounting mechanism
EP3659763B1 (fr) 2018-11-28 2023-05-31 Black & Decker Inc. Outil électrique
US11123838B1 (en) * 2019-07-01 2021-09-21 Jack Huffman Scarborough Sheetrock grinder power hand tool
CN110508868A (zh) * 2019-07-31 2019-11-29 浙江开创电气股份有限公司 电圆锯
US12083613B2 (en) 2022-10-18 2024-09-10 Techtronic Cordless Gp Track saw including plunge lockout mechanism

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0734822A2 (fr) * 1995-03-30 1996-10-02 HILTI Aktiengesellschaft Dispositif pour rainurer une paroi
DE19757236A1 (de) * 1997-12-22 1999-06-24 Hilti Ag Mauerschlitzgerät
DE10261743A1 (de) * 2002-12-30 2004-07-22 Robert Bosch Gmbh Handkreissägemaschine B27B

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DE3815245A1 (de) * 1988-05-05 1989-11-16 Bosch Gmbh Robert Sicherheitseinrichtung an einer handwerkzeugmaschine
DE19923145A1 (de) * 1999-05-20 2000-11-23 Hilti Ag Absaughaube für handgeführte Trennschleifer
JP4283464B2 (ja) * 2001-08-02 2009-06-24 株式会社マキタ 際切りマルノコ
US7059947B2 (en) * 2004-05-12 2006-06-13 The Stanley Works Portable rail cutting apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0734822A2 (fr) * 1995-03-30 1996-10-02 HILTI Aktiengesellschaft Dispositif pour rainurer une paroi
DE19757236A1 (de) * 1997-12-22 1999-06-24 Hilti Ag Mauerschlitzgerät
DE10261743A1 (de) * 2002-12-30 2004-07-22 Robert Bosch Gmbh Handkreissägemaschine B27B

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2020280A2 (fr) 2007-07-30 2009-02-04 HILTI Aktiengesellschaft Dispositif de recouvrement d'une machine-outil
DE102007000415A1 (de) 2007-07-30 2009-02-05 Hilti Aktiengesellschaft Abdeckvorrichtung eines Werkzeuggerätes
WO2013072106A1 (fr) * 2011-11-15 2013-05-23 Robert Bosch Gmbh Dispositif de limitation d'une profondeur de coupe
CN103945998A (zh) * 2011-11-15 2014-07-23 罗伯特·博世有限公司 切削深度限制装置
CN103945998B (zh) * 2011-11-15 2016-11-23 罗伯特·博世有限公司 切削深度限制装置
RU2606832C2 (ru) * 2011-11-15 2017-01-10 Роберт Бош Гмбх Устройство ограничения глубины пропила
US9623583B2 (en) 2011-11-15 2017-04-18 Robert Bosch Gmbh Device for limiting the depth of a cut
WO2016128232A1 (fr) * 2015-02-10 2016-08-18 Festool Gmbh Machine à tronçonner à main pourvue d'un dispositif de réglage de profondeur

Also Published As

Publication number Publication date
DE102005000143A1 (de) 2007-05-03
CN1951629A (zh) 2007-04-25
US7300339B2 (en) 2007-11-27
JP2007111853A (ja) 2007-05-10
EP1777047B1 (fr) 2013-11-20
US20070093189A1 (en) 2007-04-26

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