WO2011057638A1 - Appareil permettant de poncer ou de polir une surface - Google Patents

Appareil permettant de poncer ou de polir une surface Download PDF

Info

Publication number
WO2011057638A1
WO2011057638A1 PCT/DK2010/050302 DK2010050302W WO2011057638A1 WO 2011057638 A1 WO2011057638 A1 WO 2011057638A1 DK 2010050302 W DK2010050302 W DK 2010050302W WO 2011057638 A1 WO2011057638 A1 WO 2011057638A1
Authority
WO
WIPO (PCT)
Prior art keywords
grinding
screen
members
motor
elements
Prior art date
Application number
PCT/DK2010/050302
Other languages
English (en)
Inventor
Poul Erik Jespersen
Original Assignee
Poul Erik Jespersen
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 Poul Erik Jespersen filed Critical Poul Erik Jespersen
Publication of WO2011057638A1 publication Critical patent/WO2011057638A1/fr

Links

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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • 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
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
    • 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

Definitions

  • the present invention concerns an apparatus for grinding/polishing a surface, including a grinding unit with a number of grinding members, a motor attachment, a motor and a screen, where the handle is mounted on the grinding unit, where the screen includes a number of grinding members that are rotatable about individual central axes, and where each grinding member has a abrading surface which is perpendicular to its central axis as hereby is formed a common abrading surface for the grinding unit.
  • the apparatuses used are typically floor planes/floor grinding machines with either a number of round plates with circular grinding wheels or a grinding cylinder with enclosing grinding belt. It is difficult to achieve uniform grinding of the floor, and that a large amount of grinding discs or grinding belts are to be used.
  • the prior art apparatuses are typically large and heavy apparatuses which cannot easily be lifted by one person, and the weight entails that they may be difficult to manoeuvre.
  • these apparatuses are usually provided with spacers in the form of height adjustable wheels, which is not an advantage as the grinding drums cannot optimally follow the contour of the underlying surface, but the spacing between grinding drum and underlying surface will instead be determined by the contour of the underlying surface at the spots where the wheels are running. Moreover, wheels will frequently prevent grinding/polishing from being effected up to adjoining walls and corners.
  • Suction thus occurs at the top of the grinding unit and does not prevent any part of the cylindric wall from being disposed close to a wall or against a corner.
  • the apparatus according to the present invention has a grinding unit to which may be associated an exhaust for the suction pipes passing through the screen.
  • a grinding unit to which may be associated an exhaust for the suction pipes passing through the screen.
  • Suction may occur via a separate hose associated with the handle.
  • the apparatus according to the invention is peculiar in that the grinding elements include sandpaper items which are slit inwardly towards the surface of the disc.
  • slit sandpaper items is achieved a grinding which is particularly efficient as it follows the structure of the surface.
  • the apparatus according to the invention is peculiar in that the grinding elements are mounted replaceable in axially extending grooves in the disc. This will facilitate replacement of the grinding elements.
  • each grinding member includes a circular disc and grinding elements mounted thereon, that each disc has a surface to which a first edge part of a number of grinding elements are mounted, as the grinding elements are oriented substantially at right angles to the surface of the disc, that the grinding elements extend radially in the grinding member, that the grinding elements have approximately the same height such that their opposing second edge part is disposed in and forms the abrading surface, that the screen includes a circular upper wall and a cylindric outer wall at the outer circumference of the screen, that the outer circumferences of the grinding members are about touching the outer circumference of the screen, and that the central axes for the grinding unit and the grinding members are parallel.
  • each of the grinding members are provided with radially extending grinding members or so-called grinding strips, it will be possible to let these grinding elements extend to the outer periphery of each of the grinding members, and thereby also to the outer circumference of the apparatus.
  • the floor may be ground/polished right up to the edge, as the second edge part of the grinding elements, which is opposite the first edge part, is provided with grinding elements in the form of abrasive paper, brushes or similar for grinding/polishing the surface.
  • the construction with motor and grinding elements rotating about parallel axes enables a particularly simple mechanical design with the motor disposed upon the grinding unit.
  • the motor can then rotate the grinding members by a mechanically simple and light design, for example consisting of belt drive with drive belts or chains.
  • the handle is mounted pivotable in a largely vertical plane, it will be possible to put the handle in an arbitrary position relative to the apparatus. Since the grinding apparatus is circular, there is obtained an apparatus which is easy to manoeuvre as the operator may turn the apparatus between different positions by forward and backward driving. The operator may simply move the grinding unit in an arbitrary direction without having to lifting the grinding elements off in order to change direction.
  • the grinding members may be disposed at different distances from the central axis of the grinding unit. However, it is preferred that the grinding members are disposed with their central axes at the same radial distance from the central axis of the grinding unit.
  • the outer circumference of all grinding members can hereby touch the outer circumference of the grinding unit when the all grinding members have the same diameter.
  • the apparatus according to the invention is peculiar in that the motor is mounted in the motor attachment upon the grinding unit with rotation about the central axis of the grinding unit.
  • the apparatus according to the invention is peculiar in that the grinding members are rotatably seated in a mounting plate, that the mounting plate is suspended rotatably such that both the mounting plate and the grinding members are rotated when the apparatus is operating.
  • the apparatus according to the invention is peculiar in that the motor is mounted rotationally fixed in the motor attachment, and that the handle is mounted pivotable in relation to the motor attachment.
  • the motor attachment will thus constitute part of the screen enclosing the grinding unit, and at the same time constitute an attachment for the motor.
  • This design is furthermore advantageous as the handle is mounted pivotable in the motor attachment.
  • the motor attachment may in principle constitute a bushing, the inner side of the bushing being used for securing the motor, and where a bearing part is formed at the outer side of the bushing, interacting with a second bearing part disposed lowermost on the handle. Mounted on the handle, this will enable pivoting of the handle in a vertical plane. Hereby is achieved simple manoeuvring.
  • the apparatus according to the invention is peculiar in that the grinding unit is supported on the grinding elements of the grinding members. Since the grinding unit is resting directly on the grinding members, a light construction is achieved, and the need for supporting elements, e.g. support wheels preventing unencumbered grinding/polishing close to walls, is obviated. Moreover, there is achieved the advantage that there are no separate support elements that may give rise to erratic grinding. By the apparatus according to the invention, the grinding elements of the grinding members will optimally follow the contour of the underlying surface, thereby providing correct grinding/polishing.
  • the apparatus according to the invention is peculiar in that at least at its lower edge, the screen has a resilient sealing edge which extends to the grinding surface and establishes a dustproof connection with the surface.
  • a dustproof connection with the ground surface without risking that the sealing edge, which e.g. is constituted by a rubber lip, will cause the grinding members not to follow the contour of the surface.
  • the sealing edge rubber lip will therefore be made of a very soft and yieldable material so that the weight of the apparatus is borne by the grinding elements.
  • Not just a lower edge area needs to be formed of rubber.
  • a large part of the screen may be constituted by rubber which does not only extend at the sidewall but also at the upper wall of the grinding unit. Such a rubber screen may be fastened to a metal plate forming the motor attachment. Hereby, the amount of metal is reduced, enabling a lighter design.
  • the screen As alternative to the rubber lips it will be possible to provide the screen with other elements that establish a dust sealing, including a number of brushes which are mounted at the edge area. As alternative to rubber, other materials may be applied as well, such as soft plastic materials.
  • the apparatus according to the invention is peculiar in that the motor is mounted with its drive shaft rotatable about the central axis of the grinding unit, and that the drive shaft is provided with a belt drive, and that belts connect the motor belt drive with belt drives on each of the shafts of the grinding members.
  • the motor is mounted with its drive shaft rotatable about the central axis of the grinding unit, and that the drive shaft is provided with a belt drive, and that belts connect the motor belt drive with belt drives on each of the shafts of the grinding members.
  • the apparatus according to the invention is peculiar in that the motor is a frequency controlled motor.
  • the motor is a frequency controlled motor.
  • a mechanically simple and relatively light construction is achieved.
  • Belts, chains or similar which are connected with each of the grinding members such that they rotate in different directions enable establishment of easy control and thereby manoeuvring of the apparatus.
  • the apparatus according to the present invention is described as being used for grinding or polishing a surface. Grinding/polishing depends on whether grinding elements or polishing elements are used in the grinding members.
  • the used grinding elements will typically be fastened in undercut grooves such that they can easily be replaced by drawing out/inserting the tools in the radially oriented grooves which are located in the circular disc of the grinding member.
  • the apparatus can be used on all surfaces where grinding/polishing is desired.
  • the apparatus may thus be envisaged applied for grinding/polishing of wood, metal and/or fibre-reinforced plastic materials.
  • Figs. 1-4 show an apparatus according to the invention in perspective view, from above, from the side and from below, respectively;
  • Fig. 5 shows a partial perspective and schematic view of an apparatus according to the invention where certain parts are removed;
  • Fig. 6 shows a partial perspective view according to Fig. 4, but with other apparatus parts removed;
  • Fig. 7 shows a partial view from above with some apparatus parts removed for illustrating the location of the motor and the grinding members
  • Fig. 8 shows a perspective partial view with some apparatus parts removed for illustrating the course of the belts.
  • Figs. 1-4 show an apparatus 1 for grinding/polishing a surface.
  • the apparatus includes a grinding unit 2 in which is mounted a number of grinding members 3. In the shown embodiment, four grinding members 3 are mounted. Each grinding member is rotatable about its own central axis 4. The apparatus is symmetric and may therefore be operated with arbitrary rotation about the central axis 5 of the grinding unit .
  • Each grinding member has an abrasive surface, and all abrasive surfaces are located in the same grinding plane 6 (see Fig. 4).
  • the abrasive face 6 is perpendicular to the central axes 4 and 5.
  • the grinding apparatus furthermore includes a motor 7 and a handle 8.
  • the handle 8 is provided with a handle 9 at one end, and at its other end it is connected with the grinding unit via a connecting arrangement generally denoted by the reference number 10.
  • Each of the grinding members may in principle be of the type described in European patent application EP 1 633 530, the content of which is hereby incorporated by reference.
  • Each grinding member 3 thus includes a circular disc 11 (see Fig. 7) in which is provided a number of radially extending grooves 12.
  • Each of the grooves 12 serve as support for a grinding element 13 (see Fig. 5), where a first edge part 14 is secured in the grooves 12.
  • Each of the grinding elements 13 will thus extend largely at right angles from the surface 16 of the disc 11 in which the grooves 12 are formed.
  • All grinding elements 13 have approximately the same height.
  • the opposite second edge part 15 will thus be placed in a common plane which coincides with the abrasive face 6.
  • the handle 8 is mounted pivotable relative to the grinding unit 2.
  • the handle 8 is therefore provided with a forked branch 17 where at the outer end of each forked branch there is provided an opening 18.
  • the opening 18 may receive a hingepin 19 which at the same time is mounted on a bearing element 20 with an aperture 21 for the hingepin 19.
  • the bearing element 20 is mounted on a bracket fitting 25 (see Fig. 7).
  • a ring element 22 is fitted on the bracket fitting 25. Together with the bracket fitting 25, it serves as a motor attachment. At its central part, the ring element 22 thus has a cutout for receiving the motor 7. At the same time, the ring element 20 constitutes an abutment for the bracket fitting for providing a secure contact surface.
  • a screen 23 for example made of a rubber element which establishes a dustproof contact with the surface to be ground/polished.
  • the screen has a circular upper wall 33 and a cylindric outer wall 34. As it particularly appears from Fig. 4, the lower edge 24 of the cylindric outer wall 34 will coincide with the abrasive surface 6.
  • the screen 23 In its upper circular wall 33, the screen 23 has two holes 35 for passage of suction tubes 36 that are passed loosely through the holes 35.
  • Fig. 5 is seen that the bracket fitting 25 is mounted on a mounting plate 26 which is formed bye two separate plates 26A and 26B.
  • the plates to support bearings 27 for each of the shafts 28 of the grinding members.
  • Each grinding member has a shaft 28 supported by bearings 27 in each of the plates 26A and 26B.
  • a pulley 29 is mounted on the shafts 28 at a position above the upper plate 26B. The pulleys 29 are driven by a pulley 31 (see Fig. 7) on the drive shaft 32 via belts 30.
  • the suction pipes 36 are fastened to the two plates 26A and 26B and will extend from the lower plate 26A to a point above the screen 23.
  • the pulleys 29 are connected in pairs by a belt 30 such that two belts 30 are used for driving the shown four grinding members 3.
  • the grinding members 3 will run in opposite directions in pairs due the way in which the two belts 30 are mounted.
  • the motor 7 is secured against rotation in the bracket fitting 25 and thereby the ring element 22, providing rotation to each of the grinding members 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

L'invention concerne un appareil (1) permettant de poncer/polir une surface, qui comprend une poignée (8) et une unité de ponçage (2) munie de plusieurs éléments de ponçage (3), un accessoire de moteur (22, 25), un moteur (7) et un écran (23), la poignée étant montée sur l'unité de ponçage. L'écran (23) contient plusieurs éléments de ponçage qui sont rotatifs autour d'axes centraux individuels (4). Chaque élément de ponçage comprend une face abrasive (6) qui est perpendiculaire à son axe central (4), formant ainsi une surface abrasive commune (6) pour l'unité de ponçage (2). Une plaque de montage (26) est formée par deux plaques circulaires (26A, 26B) espacées avec des circonférences externes correspondant approximativement au diamètre interne de la paroi externe de l'écran, au moins deux tuyaux aspirants (35, 36) attachés aux deux plaques s'étendent au travers des deux plaques (26A, 26B), les tuyaux aspirants (35, 36) s'étendant depuis la plus basse des deux plaques jusqu'à un point au-dessus de la paroi supérieure de l'écran (23) pour aspirer la poussière de ponçage, et l'écran (23) est monté de manière lâche et peut être déplacé vers le haut et vers le bas lorsqu'il est guidé par les tuyaux aspirants (35, 36) et la plaque de montage (26).
PCT/DK2010/050302 2009-11-10 2010-11-10 Appareil permettant de poncer ou de polir une surface WO2011057638A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200970197 2009-11-10
DK200970197A DK178098B1 (da) 2009-11-10 2009-11-10 Apparat til slibning/pudsning af en overflade

Publications (1)

Publication Number Publication Date
WO2011057638A1 true WO2011057638A1 (fr) 2011-05-19

Family

ID=43991226

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2010/050302 WO2011057638A1 (fr) 2009-11-10 2010-11-10 Appareil permettant de poncer ou de polir une surface

Country Status (2)

Country Link
DK (1) DK178098B1 (fr)
WO (1) WO2011057638A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600117343A1 (it) * 2016-11-21 2018-05-21 Kuenzle & Tasin S R L Gruppo di levigatura per macchina levigatrice
CN114376450A (zh) * 2020-10-20 2022-04-22 广东博智林机器人有限公司 打磨刀具和灰浆清理机器人

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097950A (en) * 1977-03-07 1978-07-04 Milliken Research Corporation Device for scrubbing surfaces
US6494772B1 (en) * 1999-11-30 2002-12-17 Roger W. Barnes Floor conditioning system
WO2005053902A1 (fr) * 2003-12-08 2005-06-16 Flex Trim A/S Machine de meulage
US7261623B1 (en) * 2001-07-23 2007-08-28 Onfloor Technologies, L.L.C. Wood floor sanding machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7241210B2 (en) * 2001-07-16 2007-07-10 Holland Industriele Diamantwerken B.V. Floor treating machine comprising individually driven discs
DK176743B1 (da) * 2003-04-25 2009-06-02 Flex Trim As Slibeskive med sandpapiremner
ATE404324T1 (de) * 2006-01-10 2008-08-15 Air Tec Ag Bodenschleifmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097950A (en) * 1977-03-07 1978-07-04 Milliken Research Corporation Device for scrubbing surfaces
US6494772B1 (en) * 1999-11-30 2002-12-17 Roger W. Barnes Floor conditioning system
US7261623B1 (en) * 2001-07-23 2007-08-28 Onfloor Technologies, L.L.C. Wood floor sanding machine
WO2005053902A1 (fr) * 2003-12-08 2005-06-16 Flex Trim A/S Machine de meulage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600117343A1 (it) * 2016-11-21 2018-05-21 Kuenzle & Tasin S R L Gruppo di levigatura per macchina levigatrice
CN114376450A (zh) * 2020-10-20 2022-04-22 广东博智林机器人有限公司 打磨刀具和灰浆清理机器人

Also Published As

Publication number Publication date
DK178098B1 (da) 2015-05-18
DK200970197A (da) 2011-05-11

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