EP2049303B1 - Ponceuse à main avec tension de traction de feuille abrasive améliorée - Google Patents

Ponceuse à main avec tension de traction de feuille abrasive améliorée Download PDF

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Publication number
EP2049303B1
EP2049303B1 EP07787421.2A EP07787421A EP2049303B1 EP 2049303 B1 EP2049303 B1 EP 2049303B1 EP 07787421 A EP07787421 A EP 07787421A EP 2049303 B1 EP2049303 B1 EP 2049303B1
Authority
EP
European Patent Office
Prior art keywords
abrasive sheet
clamping
clamping means
sanding machine
machine according
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.)
Expired - Fee Related
Application number
EP07787421.2A
Other languages
German (de)
English (en)
Other versions
EP2049303A1 (fr
Inventor
Heiko Roehm
Andreas Heber
Daniel Vesenmaier
Carsten Prause
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 EP2049303A1 publication Critical patent/EP2049303A1/fr
Application granted granted Critical
Publication of EP2049303B1 publication Critical patent/EP2049303B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
    • B24D15/023—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of flexible material
    • 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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor

Definitions

  • the abrasive carrier which is usually formed as an abrasive sheet (in a orbital sander usually as a rectangular abrasive sheet) to be fixed in a suitable manner on a Abrasive sheet carrier to the abrasion causing, usually elliptical or circular movements of the abrasive sheet carrier not slip off of this or make an undesirable relative movement to this.
  • clamping levers are formed on at least one narrow side of the abrasive sheet carrier, and where in addition to the clamp a spring stopper is provided, wherein the abrasive sheet inserted between clamp and spring stopper and be tensioned by a movement of the clamp or its clamping lever both the clamp and the spring stopper with the paper clamped therein.
  • the clamping lever is fixed in an end position and gives the final paper tension on the abrasive sheet carrier.
  • Such a clamping system is approximately from the DE 102 32 055 which is considered to be the closest prior art.
  • the clamping elements must be relatively strong in order to transmit the high clamping forces, which leads to a higher weight on one side.
  • the center of gravity of the abrasive sheet carrier and the components mounted thereon shifts out of the center (the region of the swing axis) resulting in higher vibrations which in turn induce vibrations into the system and result in both increased wear and deterioration of the work result.
  • the object of the invention is to provide a grinding hand tool machine which has a clamping system which avoids the disadvantages mentioned.
  • an abrasive hand tool in particular an orbital sander is proposed, with an abrasive sheet carrier and with clamping means for clamping opposite abrasive sheet ends of a supportable on the abrasive sheet carrier grinding sheet, said first clamping means together with a clamped sheet of the other end clamped by second clamping means abrasive sheet ends for tensioning the abrasive sheet are moved away and have the first clamping means spring elasticity. It is provided here that the first clamping means in a Spannendposition with bias against a rigid stop element.
  • the first clamping means are held in their Spannendposition not only on the one hand by the tensile force of the tensioned abrasive sheet and on the other hand by the spring tension of the first clamping means in force equilibrium. Rather, the stop element is added, which ensures the first clamping means a defined Spannendposition and in particular a stable position with power dissipation, whereby a free swinging of the first clamping means no longer occurs during operation of the grinding hand tool. It is hereby assumed in each case that the abrasive sheet is first fixed in the second clamping means (which may be formed in the usual way); the final tension of the abrasive sheet is always effected with the first clamping means.
  • the stop element is integral with the abrasive sheet carrier is formed or formed as a separate part to the abrasive sheet carrier and is rigidly connected to the abrasive sheet carrier.
  • the stop element is structurally an integrally executed part of the abrasive sheet carrier, for example by forming at least one nose or a support on the first clamping means associated end of the abrasive sheet carrier.
  • the stop element is indeed a separate component, but this is rigidly connected to the abrasive sheet carrier, for example screwed. Essential to the invention here is that the stop element performs no relative movement to the abrasive sheet carrier, but is firmly connected to this.
  • the stop element is adjustable, in particular angle-adjustable, relative to the abrasive sheet carrier.
  • the stop element can assume different positions relative to the abrasive sheet carrier, but in which it is firmly connected to the abrasive sheet carrier or can be connected.
  • the stop element is rotatably mounted on the abrasive sheet carrier, in its desired end position, however, can be fixed by suitable devices (for example, screwed or snapped).
  • the first clamping means and / or the second clamping means at least partially and / or in parts and / or in partial areas elastically deformable gripping aids, in particular rubber.
  • the first clamping means are made of metal or other elastic materials. As such, they naturally have rather smooth surfaces, so that in unfavorable cases, the abrasive sheet can perform a relative movement to them and can slip out in very unfavorable cases.
  • the elasticity of the first clamping means becomes at least in partial areas applied or mounted deformable gripping aids that hold the abrasive sheet safely by means of their elastic deformation or adhesiveness.
  • these gripping aids made of rubber, wherein the rubber can be wound up as rolls, vulcanized or brushed or applied in any other suitable form.
  • the first clamping means are designed as clamps and clamping plate.
  • the clamping bracket and the clamping plate are in this case arranged so that they occupy a substantially opposite, with the abrasive sheet is placed between them.
  • the abrasive sheet is clamped between them and tensioned by a further movement of the clamp.
  • the clamping plate is rotatably mounted relative to the abrasive sheet carrier about a transverse axis.
  • the clamping plate can therefore perform a pivoting movement relative to the abrasive sheet carrier.
  • this makes it possible that the clamping plate and clamping bracket in turn perform a relative movement with the zuspannenden abrasive sheet, which ultimately causes the tension.
  • the clamping plate is spring-loaded.
  • the clamping plate can be provided with a relatively high bias, so that the final clamping the gripping blade resulting clamping force is not applied relative to the abrasive sheet carrier, but between clamping plate and clamp. In this way, a considerable relief of the abrasive sheet carrier of clamping forces is possible, so that it does not have to be performed in an unnecessarily heavy and stable design, only to avoid distortions generated by clamping forces and their opposing forces.
  • the clamping plate consists of resilient material or has a resilient material.
  • the clamping plate can thus in turn cause the bias and ultimately clamping the clamping sheet between clamping plate and clamp.
  • the clamping bracket is rotatably mounted about a transverse axis of the abrasive sheet carrier and having a clamping lever.
  • FIG. 1 shows an abrasive sheet carrier 1 of a grinding hand tool, not shown, namely an orbital sander.
  • first clamping means 3 are arranged, namely a clamping bracket 4, which is mounted in bearings 5, which are arranged on an upper side 6 of the abrasive sheet carrier 1, and is continued in a clamping lever 7, and a clamping plate 8, in extension of the Top side 6 of the abrasive sheet carrier 1 above the clamping bracket 4, namely in particular above a clamping portion 28 of the clamping bracket 4, is arranged.
  • a stop element 9 is arranged in the form of a substantially flat-shaped bracket 10, wherein the plane of the bracket 10 is angled by a few degrees from the plane of the top 6 of the abrasive sheet carrier 1.
  • a rotary leg spring 13 is arranged, which is supported on the one hand on a region 14 of the upper side 6 of the abrasive sheet carrier 1, and on the other hand on a clamping plate top 15. In this way, the clamping plate 8 is spring-loaded, so that it can only be moved against this spring tension in the direction of the stop element 9.
  • the clamping plate 8 has at a first outer end 16 and at a second outer end 17 each continuations 18, which are at least on one of the clamping bracket 4 facing bottom 19 with an elastic coating 20, for example, with rubber occupied.
  • the clamping bracket 4 is bow-shaped so that it rotates when turning the clamping lever 8 in the direction of the top 6 of the abrasive sheet carrier 1 back in the bearings 5 at least so far that it is in contact with the clamping plate 8, preferably with the continuations 18 of Clamping plates 8 is coming.
  • FIG. 2 shows in side view the same first clamping means 3 on the abrasive sheet carrier 1 in the open state.
  • an abrasive sheet 21 is loosely shown prior to clamping in the first clamping means 3, wherein its front end 22 protrudes beyond the abrasive sheet carrier 1 in the region of the first clamping means 3 for clarity. It is assumed that the abrasive sheet on the opposite second clamping means, which are not shown here, is already fixed tensile strength. In this side view, the formation of the clamp 4 is very clearly visible.
  • the bail arm 23 has at its bearing remote end 24 a return bend 25 in the form of a wide open U on.
  • a clamping support arm 26 is formed, which merges at its end 27 facing away from the return bend 25 into the clamping region 28, which is not visible here and runs essentially parallel to the first longitudinal side 2 of the abrasive sheet carrier 1.
  • elastic rollers 29 (for example made of rubber) are arranged, which in contrast to the formed in the extension of the abrasive sheet carrier 1 clamping plate 8 and there in particular to its continuations 18, which have the elastic covering 20 on the bottom 19.
  • the clamping lever 7 is formed, which serves for pivoting / rotation of the clamping clip 4 in the bearing points 5.
  • the clamping portion 28 of the clamp 4 is displaced in the direction of the continuations 18 of the clamping plate 8 out.
  • the grinding sheet 21 located between the clamping region 28 and the clamping plate 8 is gripped and fixed on the upper side by the elastic supports 29 on the underside and by the elastic covering 20 of the continuations 18.
  • FIG. 3 shows how the abrasive sheet 21 is gripped and fixed with its front end 22 between the clamping region 28, namely in particular its elastic supports 29 and the elastic covering 20 of the continuations 18 of the clamping plate 8.
  • the elastic pads 29 and the elastic pads 20 thus act as gripping aids 30, which cause an at least provisional fixation of the abrasive sheet 21 already in the course of the tensioning process.
  • FIG. 4 shows the same arrangement of abrasive sheet carrier 1 and first clamping means 3 in exciting position.
  • the clamping lever 7 is hereby displaced in its end position substantially parallel to the upper side 6 of the abrasive sheet carrier 1 and is held there approximately by a locking lug 31.
  • the abrasive sheet 21 has, moved by the gripping aids 30 of the clamping portion 28 and the continuations 18 relative to the first longitudinal end 2 of the abrasive sheet carrier 1 moved away and thus tensioned.
  • the clamping plate 8 which is rotatably mounted for this purpose in a rotation axis 32, against the spring load by the torsion spring 13 together with the clamping bracket 4 by its upward movement on lowering the clamping lever 7 has been moved in the direction of the stop element 9 until this movement the stop of the continuations 18 on a stop element bottom side 33 of the stop element 9 was mechanically limited.
  • the stop element 9 can be designed to be angularly adjustable relative to the abrasive sheet carrier 1, so that the tension end position (striking of the continuations 18 on the stop element underside 33) can be adjusted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (9)

  1. Ponceuse à main, en particulier ponceuse orbitale, comprenant un support de feuille abrasive (1) et des moyens de serrage (3) pour serrer des extrémités opposées de feuille abrasive (22) d'une feuille abrasive (21) pouvant être supportée sur le support de feuille abrasive (1), des premiers moyens de serrage (3), réalisés sous forme d'étrier de serrage (4) et de tôle de serrage (8) sollicitée par ressort, conjointement avec une extrémité de feuille abrasive (22) serrée entre une région de serrage (28) de l'étrier de serrage (4) et des prolongements (18) de la tôle de serrage (8), pouvant être écartés de l'autre extrémité de feuille abrasive serrée au moyen de deuxièmes moyens de serrage pour le serrage par traction de la feuille abrasive (21), et les premiers moyens de serrage (3) possédant une élasticité de ressort, caractérisée en ce que les premiers moyens de serrage (3) entrent dans une position de serrage avec précontrainte contre un élément de butée rigide (9).
  2. Ponceuse à main selon la revendication 1, caractérisée en ce que l'élément de butée (9) est réalisé d'une seule pièce avec le support de feuille abrasive (1) ou est réalisé sous forme de pièce séparée du support de feuille abrasive (1) et est connecté rigidement au support de feuille abrasive ( 1 ) .
  3. Ponceuse à main selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de butée (9) est réalisé de manière réglable par rapport au support de feuille abrasive (1), notamment de manière réglable angulairement.
  4. Ponceuse à main selon l'une quelconque des revendications précédentes, caractérisée en ce que les premiers moyens de serrage (3) et/ou les deuxièmes moyens de serrage présentent au moins en partie et/ou dans certaines parties et/ou dans des régions partielles, des auxiliaires de préhension déformables élastiquement (30), notamment en caoutchouc.
  5. Ponceuse à main selon l'une quelconque des revendications précédentes, caractérisée en ce que les premiers moyens de serrage (3) sont réalisés sous forme d'étrier de serrage (4) et de tôle de serrage (8).
  6. Ponceuse à main selon l'une quelconque des revendications précédentes, caractérisée en ce que la tôle de serrage (8) est montée de manière rotative autour d'un axe transversal par rapport au support de feuille abrasive (1).
  7. Ponceuse à main selon l'une quelconque des revendications précédentes, caractérisée en ce que la tôle de serrage (8) est sollicitée par ressort.
  8. Ponceuse à main selon l'une quelconque des revendications précédentes, caractérisée en ce que la tôle de serrage (8) se compose d'un matériau élastique à ressort ou présente un matériau élastique à ressort.
  9. Ponceuse à main selon l'une quelconque des revendications précédentes, caractérisée en ce que l'étrier de serrage (4) est monté à rotation autour d'un axe transversal du support de feuille abrasive (1) et présente un levier de serrage (7).
EP07787421.2A 2006-08-02 2007-07-12 Ponceuse à main avec tension de traction de feuille abrasive améliorée Expired - Fee Related EP2049303B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006035977A DE102006035977A1 (de) 2006-08-02 2006-08-02 Schleifhandwerkzeugmaschine mit neuer Schleifblattzugspannung
PCT/EP2007/057150 WO2008015087A1 (fr) 2006-08-02 2007-07-12 Ponceuse à main avec tension de traction de feuille abrasive améliorée

Publications (2)

Publication Number Publication Date
EP2049303A1 EP2049303A1 (fr) 2009-04-22
EP2049303B1 true EP2049303B1 (fr) 2013-04-17

Family

ID=38515516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07787421.2A Expired - Fee Related EP2049303B1 (fr) 2006-08-02 2007-07-12 Ponceuse à main avec tension de traction de feuille abrasive améliorée

Country Status (6)

Country Link
US (1) US8025558B2 (fr)
EP (1) EP2049303B1 (fr)
CN (1) CN101495270B (fr)
DE (1) DE102006035977A1 (fr)
RU (1) RU2440882C2 (fr)
WO (1) WO2008015087A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5275854B2 (ja) * 2009-03-10 2013-08-28 株式会社マキタ サンダ
CN201493733U (zh) * 2009-08-03 2010-06-02 南京德朔实业有限公司 砂光机
JP2016132044A (ja) * 2015-01-16 2016-07-25 リョービ株式会社 サンダ

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2715804A (en) * 1953-11-25 1955-08-23 David R Wickes Sanding machine
US3540161A (en) * 1966-05-25 1970-11-17 Wen Products Inc Vibratory tool
US3546822A (en) * 1968-11-29 1970-12-15 Alma A Hutchins Clip for surface treating tool
US4077165A (en) * 1976-11-26 1978-03-07 Hutchins Alma A Abrading tool clip with automatic take-up
US4330964A (en) * 1980-04-14 1982-05-25 Evidio Martinez Sanding device
JPS6161761A (ja) * 1984-08-29 1986-03-29 Makita Denki Seisakusho:Kk コ−ドレス研摩機
JPH0215256U (fr) * 1988-07-01 1990-01-30
US5616072A (en) * 1990-11-23 1997-04-01 Robert Bosch Gmbh Device for clamping sandpaper on a vibrating sander
DE10139547A1 (de) * 2001-08-10 2003-02-20 Bosch Gmbh Robert Schleifhandwerkzeugmaschine
DE10139546A1 (de) * 2001-08-10 2003-02-20 Bosch Gmbh Robert Schleifhandwerkzeugmaschine
DE10232055A1 (de) 2002-07-16 2004-02-05 Robert Bosch Gmbh Schleifhandwerkzeugmaschine
DE10323640A1 (de) 2003-05-26 2004-12-16 Robert Bosch Gmbh Schleifhandwerkzeugmaschine
DE10353682A1 (de) 2003-11-17 2005-06-16 Robert Bosch Gmbh Handschleifwerkzeug

Also Published As

Publication number Publication date
DE102006035977A1 (de) 2008-02-07
US8025558B2 (en) 2011-09-27
CN101495270B (zh) 2011-12-14
EP2049303A1 (fr) 2009-04-22
US20080214098A1 (en) 2008-09-04
CN101495270A (zh) 2009-07-29
RU2009106954A (ru) 2010-09-10
RU2440882C2 (ru) 2012-01-27
WO2008015087A1 (fr) 2008-02-07

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