EP1800798A2 - Schleifvorrichtung für eine Schleifmaschine - Google Patents

Schleifvorrichtung für eine Schleifmaschine Download PDF

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Publication number
EP1800798A2
EP1800798A2 EP07075203A EP07075203A EP1800798A2 EP 1800798 A2 EP1800798 A2 EP 1800798A2 EP 07075203 A EP07075203 A EP 07075203A EP 07075203 A EP07075203 A EP 07075203A EP 1800798 A2 EP1800798 A2 EP 1800798A2
Authority
EP
European Patent Office
Prior art keywords
sanding
carrier
coupling elements
base
sandpaper
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
EP07075203A
Other languages
English (en)
French (fr)
Other versions
EP1800798A3 (de
EP1800798B1 (de
Inventor
Antonie Johannes Moolenaar
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
Priority claimed from NL1023973A external-priority patent/NL1023973C2/nl
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1800798A2 publication Critical patent/EP1800798A2/de
Publication of EP1800798A3 publication Critical patent/EP1800798A3/de
Application granted granted Critical
Publication of EP1800798B1 publication Critical patent/EP1800798B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material

Definitions

  • the invention relates to a sanding device for a sanding machine, comprising a carrier, a sanding element and at least two coupling elements with which the sanding element is coupled to the carrier, wherein a movable connection is provided between the sanding element and the carrier.
  • Such a sanding device is known from WO 96/34721 .
  • a sanding element is connected via two pivot arms to a carrier which is releasably connected to the sanding sole of a sanding machine.
  • the sanding element consists of a flexible support plate with pads to which a piece of sandpaper is fixed.
  • the pivot arms are mounted pivotally on the support plate and on the other arranged slidably in slotted holes in the carrier.
  • the ends of the pivot arms can be fixed in the slotted holes via nuts.
  • the curvature of the support plate is adjusted as desired by sliding the pivot arm ends in the slotted holes and fixed in place by tightening the nuts.
  • the sanding element thus has a fixed position during sanding.
  • a drawback of this known sanding device is that it is a relatively complex construction, while the degree of flexibility is very limited, particularly during sanding of surfaces with a radius of curvature.
  • the present invention has for its object to provide such a sanding device, the construction of which is simpler and more suitable for sanding surfaces with different radii of curvature.
  • the coupling elements only support the sanding element at the ends. In the centre of the sanding element the sanding element is not supported, so that it is sufficiently flexible. Because these ends of the coupling elements can move relative to each other, the radius of curvature on the surface for sanding can be adjusted during sanding.
  • the coupling elements can themselves be flexible here in order to provide the desired movement. It is however also possible for the coupling elements to be hingedly connected to the carrier. Both variants can also be combined.
  • the device comprises means for urging the coupling elements apart at least at the position of the sanding element.
  • An additional tensioning force is hereby generated in the sanding element, whereby the normal force to be exerted by the sanding element, and thereby the sanding force, is greater.
  • the sanding element comprises a flexible supporting element connected fixedly to the coupling elements, for the purpose of supporting a sheet of sandpaper for connecting thereto.
  • the supporting element connected fixedly to the coupling elements is for instance formed by a piece of fabric or other flexible material, which is preferably provided with Velcro material for attaching a sheet of sandpaper or sand cloth thereto.
  • This sandpaper or sand cloth must then of course be provided with mating Velcro material. It is otherwise also possible to make use of a supporting element into which the Velcro material is already integrated.
  • a specific embodiment provides the measure that the coupling elements are connected to a base, and that the base is releasably connected to the carrier.
  • the sanding element has the form of a closed sanding belt which extends around the combination of coupling elements and base. It hereby becomes possible to make use of annular belts of sanding material, wherein these can be mounted with a simple operation. The use of a support for the sandpaper or sand cloth between the coupling elements is unnecessary here. Replacement of the sandpaper is moreover easier.
  • the base is connected releasably and rotatably to the carrier in order to facilitate sanding.
  • this measure provides the option of exchanging the sanding element, together with the base and the coupling elements, for a similar combination with a different configuration or shape.
  • Other processing elements can moreover be placed, such as a rigid sanding element or an element adapted to carry out a process other than sanding.
  • the base can be releasable in at least one angular position of the carrier.
  • Use is for instance made here of a configuration of a bayonet fitting, wherein the fitting is in the locked position in an active position of the sanding element.
  • the invention further relates to a sanding machine comprising a sanding sole and a sanding device, wherein the carrier of the sanding device can be formed by the sanding sole of the sanding machine or the sanding device can be releasably connected to the sanding sole of the sanding machine.
  • Figure 1 shows a sanding machine designated as a whole with 1, which is provided with a sanding sole 2.
  • this sanding sole 2 can be provided with a piece of sandpaper or sand cloth for performing a surface sanding operation.
  • Sanding machine 1 is herein adapted to drive sanding sole 2 such that it executes a reciprocal movement. This can be a movement back and forth but may also be a rotating movement, or a combination of both types of movement.
  • a carrier 3 is fixed onto sanding sole 2. This carrier 3 is connected to sanding sole 2 for instance by means of a snap connection or as according to the method described in EP-A-1166963 .
  • the sanding device for sanding machine 1 shown in figures 1 and 2 comprises a sanding element 9, 10 and two coupling elements 8 with which sanding element 9, 10 is coupled to carrier 3.
  • Carrier 3 is provided with two hinge constructions 4 extending in parallel as shown in figure 2.
  • Each of these hinge constructions 4 is formed by a retaining element 5, which is formed integrally with carrier 3 and a shaft 6.
  • Shaft 6 is provided with protruding end parts 7 which can be received by means of a snap connection in recesses 29 arranged in retaining elements 5.
  • Hinges 6 are formed integrally with coupling elements 8.
  • the two coupling elements 8 are coupled to a sandpaper supporting element 9 manufactured from flexible material.
  • This sandpaper supporting element 9 is connected for this purpose to coupling elements 8 by means of for instance glueing or another type of connection.
  • On its outside the sandpaper supporting element 9 is provided with Velcro material.
  • Sandpaper 10 can be arranged on the sandpaper supporting element 9 by means of a Velcro connection.
  • Figures 3 and 4 show another embodiment of the invention, which relates principally to the manner in which the sandpaper is attached.
  • annular piece of sandpaper 12 which is placed round a combination 13.
  • This combination 13 is formed by a base 14 to which two coupling elements 16 are connected by means of hinges 15.
  • the dimensions of the annular piece of sandpaper 12 and combination 13 are such that, in the situation shown in figure 4, sandpaper 12 is as flat as possible at the position of the sanding surface.
  • the combination 13 with sandpaper 12 arranged thereon is pushed into a clip 17 arranged on carrier 3.
  • Clip 17 fixedly clamps the combination with the sandpaper 12 arranged therearound.
  • coupling elements 16 will have a preferred position. They will be urged into this preferred position. A stretching force is hereby exerted on the part of sanding belt 12 adapted for the sanding operation. In the foregoing embodiment there is no such preferred position. This can of course be arranged as desired. The relevant means can be provided for this purpose.
  • An advantage of the embodiment shown in figure 4 is that sandpaper 12 can be used more completely. After the uppermost piece of sandpaper 12 has been used, the annular sandpaper 12 can be rotated and a subsequent piece of sandpaper 12 can be used.
  • the embodiment shown in figure 5 comprises a carrier 3 in the form of a sanding sole for releasable connection to a sanding machine, on which sole a base 14 is rotatably mounted.
  • base 14 On base 14 are arranged two coupling elements 16 which are manufactured from flexible material. At least the distal ends of these coupling elements 16 are connected to a sanding element (not shown).
  • the coupling elements 16 and base 14 are embodied integrally.
  • Base 14 is provided with a shaft which is not shown in the drawing and which extends into carrier 3 perpendicularly of carrier 3.
  • Base 14 is provided with a nose which is not shown in the drawing and which engages under a substantially L-shaped edge 18 fixed to carrier 3. This edge 18 extends in a circular arc.
  • Base 14 is secured on carrier 3 in that the nose protrudes below L-shaped edge 18.
  • Base 14 can be removed by rotating the nose from under edge 18.
  • Base 14 can be locked on carrier 3 in diverse angular positions by per se known locking means, such as an elevation 25 as shown in figure 5 in co-action with a corresponding recess in the bottom of base 14. The action of a bayonet fitting is obtained here.
  • Rapid exchange of the base 14 with the sanding element arranged thereon is thus possible, wherein a good connection to base 14 is obtained despite this advantage, this being important in respect of the transfer of forces during sanding.
  • This fastening otherwise provides the option of rapid replacement of base 14 by a base on which is placed a sanding element with a different configuration.
  • a substantially rigid sanding element with a form adapted to the operation to be performed, such as a concave, convex, folded form or with a sharp point.
  • the reference numeral 3 designates the sanding sole of the sanding machine (not further shown) since this fulfills the function of carrier 3.
  • a clamping element 20 is connected rotatably to sanding sole 3.
  • Clamping element 20 is mounted for this purpose on carrier 3 by means of a shaft 21.
  • the clamping element is provided with a U-shaped end part 22 and a pair of ridges 23. Ridges 23 continue as side walls 27 and 28, of which the wall 28 is shown broken-away in figure 6.
  • a base 14, on which a sanding element can be mounted via coupling elements or an element for performing another type of process can be directly mounted, is provided with two noses 24, 26.
  • the first nose 24 can be pushed into U-shaped end part 22 and the second nose 26 can be placed between ridges 23. The thus obtained assembly can then be rotated until the second nose 26 comes to lie under retaining edge 18 and is secured thereby.
  • FIG. 7 shows a further embodiment of a sanding device according to the present invention.
  • a carrier 3 on which is arranged a bearing 30.
  • Bearing 30 is semicircular.
  • An L-shaped edge 18 is further placed on carrier 3, as in the foregoing embodiment.
  • Recesses 31 are arranged in the upper side of the L-shaped edge.
  • the base 14 takes the form of a flat plate 32 which is provided at one end with a disc-shaped part 33. This disc-shaped part 33 fits into bearing 30. The other end 41 of plate 32 extends under the L-shaped profile 18. A connecting piece 34 is arranged on plate 32.
  • Three recesses 31 are arranged in the upper side of L-shaped edge 18 in order to fix base 14 in one of three possible positions.
  • a tongue 35 Arranged on connecting part 34 is a tongue 35 which is provided on its front bottom side with a protrusion 36 which fits into each of the recesses 31.
  • tongue 35 has a resilient form, so that protrusion 36 can be placed into any of the recesses 31. The distal end of tongue 35 can be moved upward again using the fingers, so that protrusion 36 is lifted out of recess 31 and base 14 can be rotated.
  • a sandpaper carrier 38 is arranged on connecting part 34. This can be placed releasably on connecting part 34 but can also be arranged fixedly. Sandpaper is attached to sandpaper carrier 38.
  • Sandpaper carrier 38 can be a rigid element but may also be manufactured from flexible material so that the outer edges thereof can move relative to each other during sanding, and the curvature of sandpaper carrier 38, including the sandpaper, adapts to the workpiece for sanding.
  • sandpaper carrier 38 is placed obliquely relative to carrier 3. This means that the distance between carrier 3 and sandpaper carrier 38 is greater in the vicinity of tongue 35 than in the vicinity of bearing 30. In other words, the lower and upper edge of connecting part 34 do not extend parallel to each other (see figure 9). This measure has been taken to enable better execution of determined sanding operations. Sanding machine 1 can then be handled more easily while maintaining full contact between sandpaper carrier 38 and the workpiece.
  • Figure 9 further shows the separate part of the sanding device, i.e. the combination of sandpaper carrier 38 and base 32, 34 on which it is mounted.
  • Figure 10 finally shows the component of figure 9 from above.
  • a chamfering 39 is arranged for easy movement of plate 32 to a position under the L-shaped edge 18.
  • Slots 40 are further arranged in order to form resilient tongues enabling practically immobile placing of plate 32 under edge 18.
  • base 32, 34 can be readily exchanged for a base on which a different sanding element or a different processing element is placed.
  • Different variants are shown in figures 11A-G. Shown successively are a rigid sanding element of square (fig. 11A), V-shaped (fig. 11B), triangular (fig. 11C), finger-like (fig. 11D), concave (fig. 11E) and convex (fig. 11F) form and a flexible sanding element according to the embodiment of figures 1 and 2 (fig. 11G).

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)
EP07075203A 2003-07-22 2004-07-22 Schleifvorrichtung für eine Schleifmaschine Expired - Lifetime EP1800798B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1023973A NL1023973C2 (nl) 2003-07-22 2003-07-22 Vlakschuurmachine met flexibel schuurvlak.
NL1024981A NL1024981C2 (nl) 2003-07-22 2003-12-10 Vlakschuurmachine met flexibel schuurvlak.
EP04774836A EP1646476B1 (de) 2003-07-22 2004-07-22 Schleifvorrichtung für eine schleifmaschine

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP04774836A Division EP1646476B1 (de) 2003-07-22 2004-07-22 Schleifvorrichtung für eine schleifmaschine

Publications (3)

Publication Number Publication Date
EP1800798A2 true EP1800798A2 (de) 2007-06-27
EP1800798A3 EP1800798A3 (de) 2009-01-07
EP1800798B1 EP1800798B1 (de) 2009-11-25

Family

ID=34082450

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07075203A Expired - Lifetime EP1800798B1 (de) 2003-07-22 2004-07-22 Schleifvorrichtung für eine Schleifmaschine
EP04774836A Expired - Lifetime EP1646476B1 (de) 2003-07-22 2004-07-22 Schleifvorrichtung für eine schleifmaschine

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP04774836A Expired - Lifetime EP1646476B1 (de) 2003-07-22 2004-07-22 Schleifvorrichtung für eine schleifmaschine

Country Status (5)

Country Link
EP (2) EP1800798B1 (de)
DE (2) DE602004024341D1 (de)
NL (1) NL1024981C2 (de)
RU (1) RU2343063C2 (de)
WO (1) WO2005007341A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008013733U1 (de) * 2008-10-20 2009-10-29 Kolthoff & Co., Flüelen Handschleifgerät
KR101809956B1 (ko) * 2017-05-29 2017-12-18 (주)대코 평행되고 대향되게 장착되는 2개의 지석들을 용이하게 교환할 수 있는 연속 압축 선스프링 연마장치

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996034721A2 (de) * 1995-05-04 1996-11-07 Alice Schlattl Vorrichtung zum schleifen von oberflächen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002307315A (ja) * 2001-04-19 2002-10-23 Ykk Corp 研磨布紙の固定具

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996034721A2 (de) * 1995-05-04 1996-11-07 Alice Schlattl Vorrichtung zum schleifen von oberflächen

Also Published As

Publication number Publication date
DE602004009933T2 (de) 2008-09-04
EP1800798A3 (de) 2009-01-07
WO2005007341A1 (en) 2005-01-27
RU2006105388A (ru) 2006-06-27
NL1024981C2 (nl) 2005-01-26
EP1646476B1 (de) 2007-11-07
DE602004009933D1 (de) 2007-12-20
EP1646476A1 (de) 2006-04-19
RU2343063C2 (ru) 2009-01-10
DE602004024341D1 (de) 2010-01-07
EP1800798B1 (de) 2009-11-25

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