EP1380388B1 - Dispositif de montage d'un outil de ponçage - Google Patents

Dispositif de montage d'un outil de ponçage Download PDF

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Publication number
EP1380388B1
EP1380388B1 EP20030254333 EP03254333A EP1380388B1 EP 1380388 B1 EP1380388 B1 EP 1380388B1 EP 20030254333 EP20030254333 EP 20030254333 EP 03254333 A EP03254333 A EP 03254333A EP 1380388 B1 EP1380388 B1 EP 1380388B1
Authority
EP
European Patent Office
Prior art keywords
disc
hooks
support
moulded
support disc
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
EP20030254333
Other languages
German (de)
English (en)
Other versions
EP1380388A1 (fr
Inventor
Hisanori c/o YKK France S.a.r.l. Kato
Sebastien c/o YKK France S.a.r.l. Melinette
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.)
YKK Europe Ltd
Original Assignee
YKK Europe Ltd
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 YKK Europe Ltd filed Critical YKK Europe Ltd
Publication of EP1380388A1 publication Critical patent/EP1380388A1/fr
Application granted granted Critical
Publication of EP1380388B1 publication Critical patent/EP1380388B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • B24D9/085—Devices for mounting sheets on a backing plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/20—Mountings for the wheels

Definitions

  • the present invention relates to a support disc for an electrical disc sanding apparatus and an electrical disc sanding apparatus in which a circular sheet of abrasive material is rotated, as per the preambles of claim 1 and 13 respectively.
  • Such apparatus is well known in the art, see for example FR-A-2 701 417.
  • a thin, flexible sheet of abrasive material is mounted on a more rigid disc-shaped support which in turn is coupled to an electric motor for rotating the support disc.
  • the sheet may be held in place by a mechanical arrangement of a bolt and dished washer, the bolt penetrating the centre of the sheet and disc, and the bolt head and washer being accommodated in a recess.
  • a layer of woven hook material, of a hook and loop fastener is bonded to the underside of the disc.
  • the sheet of abrasive material has a layer of loop material on its upper surface, and so is pressed on to the hook layer to fix the abrasive sheet in place.
  • this shows a cross section through a diameter of a prior art disc and sheet of abrasive material.
  • a circular support disc 2 moulded of plastics material has a central metal ring 4 in an aperture 6, for coupling the disc to an electric motor. Smaller apertures 8 extend through the disc to allow dust, generated in a sanding operation, to be vented through the disc.
  • a layer of woven hook material 10 is bonded to the underside 12 of the disc 2 with adhesive 11. Such woven hook material is well known. The hooks may be formed by weaving loops of relatively stiff filament, which are then cut to form the hooks. Apertures 26 in the layer 10 align with apertures 8 in the disc 2 and a central aperture 27 aligns with aperture 6.
  • the loops are woven loops, such as a plush pile. Again this is well known in the art of hook and loop fastener.
  • the sheet 14 may be of laminated construction, as shown, with the loop material layer 20 bonded to the abrasive layer 15 with adhesive 30, though other constructions are possible.
  • the sheet 14 is simply pressed onto the disc. Apertures 24 in the sheet are aligned with apertures 8, 26 in the disc assembly 2 when attaching the sheet.
  • FR-A-2701417 shows a supporting disc having hooks on its underside for attachment of an abrasive sheet.
  • US-A-2001001088 shows an abrasive sheet having hooks on it.
  • the present invention provides a support disc for an electrical disc sanding apparatus, as set forth in claim 1, and an electrical disc sander including such a support disc, as set forth in claim 13.
  • the moulded hooks may be formed on a layer of material which is bonded to the main body of the disc, for example by heat or ultrasonic welding or adhesive.
  • the hooks are integrally formed on the disc body, being moulded as part of the body proper.
  • moulded hooks different constructions of abrasive sheet may be used.
  • moulded hooks are better able to attach a non-woven fabric layers and so a non-woven material may be used on the upper surface of the abrasive sheet.
  • the moulded hooks may be oriented in different directions. It is believed that this is better able to withstand the forces generated in the sanding operation.
  • books may be formed in groups which face radially outwards - that is the crook of the hook faces the perimeter of the disc.
  • the hooks may be in groups which are oriented out at an angle to the hooks of another group.
  • the hooks may also be oriented circumferentially of the disc, to optimise the shear strength of the hook and loop fastener in the direction of rotation of the disc.
  • a disc type electrical sander has a housing 100 which houses an electrical motor (not shown), a handle 102 carrying a switch 104, and a power cord 106.
  • a support disc 108 is rotatably mounted below the housing 100, by being coupled to a shaft of the electrical motor, as well known in the art.
  • a sheet 110 of abrasive material is attached to the underside 112 of the disc 108, as will be described in more detail hereinafter.
  • the support disc may be attached directly to an extension of the motor shaft, or mounted on another disc attached to the shaft, Various configurations are possible and known in the art. Also the disc may be driven via gearing if the motor is oriented differently.
  • the housing 100 has inlet vents 114, and a fan arrangement (not shown) on the motor draws air in through the vents 114, and dust through apertures 24 in the abrasive sheet 110 and disc 108, to deposit the abrasive dust in a bag 116 mounted on the housing.
  • This arrangement is well known.
  • the disc 108 has a body 109 moulded of plastics material and has a metal disc 120 insert moulded in a central aperture 122.
  • a polyester elastomer is a suitable plastics material for the disc.
  • the metal disc 120 has an aperture 124 to receive a bolt for coupling the disc to the electrical motor. Ventilation apertures 126 are positioned around the central aperture 122.
  • a layer 128 of moulded hook material, moulded of plastics material, is attached to the underside 129 of the disc body by adhesive 133.
  • Other attachment systems could be used, for example ultrasonic welding.
  • the production of moulded hook material is well known.
  • the material could be produced as sheets, from which the layer 128 is cut, or the layer 128 may be moulded to shape.
  • a base layer 131 has a multiplicity of hooks 130 integrally moulded on one surface.
  • Figure 9 shows a well known crook-shaped moulded hook used in hook and loop fastener systems.
  • the hook 130 has a crook portion 140 which faces to the right of the drawing, in the direction A.
  • crook portion 140 which faces to the right of the drawing, in the direction A.
  • hooks may be 1 or 2 mm high, but smaller hooks may be produced.
  • the system has a high shear strength, resistance to shear, in the direction opposite to the facing direction A of the crook.
  • Figure 3 and the other figures are schematic in showing only a small number of hooks and/or loops and of exaggerated dimension.
  • the number and size of hooks and loops may be varied over a wide range and tailored to meet the mechanical requirements of the product.
  • the abrasive sheet 110 may be of typical construction, as described above with references to Figure 1. However, moulded hooks are better able to be attached to a wide variety of materials, including non-woven or spun-bonded materials. Thus layer 134 of non-woven material which will couple to the hooks 130 may be provided on the upper surface of the sheet 110 in place of loop material layer 20.
  • the hooks 130 are integrally moulded on the underside 129 of the disc body 109.
  • the underside of the layer 128 of Figure 3, or the underside 129 of the disc body 109' of Figure 4 is shown.
  • the moulded hooks 130 are arranged in four groups 150 of generally identical pattern, each group occupying a quarter of the disc surface and the groups being rotated through 90 degrees around the disc so that the hooks face generally in the same direction relative to the rotation of the disc.
  • the crook shape hooks will preferably be oriented with their facing direction A generally in the direction B to resist the shear created by the abrasive material in use. It will be appreciated that the hooks within a group may be oriented in different directions.
  • this shows a hook arrangement with the hooks in groups 160 which extend radially of the disc, the hook facing radially outwards.
  • the hooks 130 face in the circumferential direction, in the direction of rotation B.
  • the hooks may be arranged in circles about the centre of the disc, or spiral radially outward. As mentioned above, only a small number of hooks is shown, in practice the surface of the disc or layer will be populated with a high number of hooks, typically 10 to 50 per sq. cm.
  • the size of the hooks 130 may be varied across the area of the disc 108. For example, it may be beneficial to have hooks with a greater height midway between the disc centre and the edge of the disc.
  • Ribs 180 or other supporting surfaces may be moulded on to the surface 131 of sheet 128, in the Figure 3 embodiment, or surface 129 of disc 109' in the figure 4 embodiment, see for example Figures 5, 6 and 9. Fewer hooks may be used, and the ribs support the sheet 14(110). Also, this may be particularly useful to avoid deformation of the hooks under pressure.
  • the hooks 130 are arranged in groups 190 with an axis of alignment C similar to the embodiment of Figure 5. Only one group is shown, and the other groups will have their axis rotated through 90 degrees as in the embodiment of Figure 5.
  • the hooks are crook shape hooks, as in Figure 9, but are in pairs, with the hooks of a pair facing in opposite directions, as shown more clearly in Figure 11.
  • ribs 191 extend up between and adjacent the hooks 130. The ribs are contiguous with the hooks and serve to reinforce the hooks against being crushed in use, and to improve the shear strength.
  • Hooks patterns with adjacent hooks facing at an angle, particularly 90 degrees, to each other are also possible.

Claims (13)

  1. Disque de support pour un dispositif de ponçage électrique à disque, le disque (108) comportant des crochets moulés (130) sur un côté inférieur (139) du disque (108), en vue d'une fixation d'une feuille coopérante de matériau abrasif (140 sur le disque, caractérisé en ce que plusieurs nervures de support (180, 191) sont agencées sur le côté inférieur du disque, en des points adjacents aux crochets (130).
  2. Disque de support selon la revendication 1, dans lequel une nervure de support (1191) est contiguë à un crochet (130).
  3. Disque de support selon les revendications 1 ou 2, dans lequel les crochets moulés sont formés sur une couche de support (128), la couche de support étant reliée au corps principal du disque.
  4. Disque de support selon les revendications 1 ou 2, dans lequel les crochets (130) sont formés d'une seule pièce sur le corps du disque (109).
  5. Disque de support selon les revendications 1, 2, 3 ou 4, dans lequel les crochets moulés (130) sont orientés dans des directions différentes sur la surface du disque (129).
  6. Disque de support selon la revendication 5, dans lequel les crochets adjacents (130) sont orientés dans des directions différentes.
  7. Disque de support selon la revendication 5, dans lequel plusieurs des crochets (130) ont une forme courbée et sont orientés radialement vers l'extérieur par rapport au périmètre du disque (108).
  8. Disque de support selon la revendication 5, dans lequel les crochets (130) sont formés dans plusieurs groupes (150) sur la surface du disque (129), chaque groupe (150) étant tourné à travers un angle par rapport à un groupe adjacent (150) sur la surface du disque (129).
  9. Disque de support selon la revendication 5, dans lequel les crochets sont orientés dans une direction circonférentielle du disque (108).
  10. Disque de support selon les revendications 8 ou 9, dans lequel les crochets (130) ont une forme courbée.
  11. Disque de support selon l'une quelconque des revendications 1 à 10, dans lequel les crochets (130) présentent une réponse asymétrique à un cisaillement lors de l'accouplement à une feuille abrasive (110) et sont alignés pour assurer une résistance au cisaillement accrue de la fixation dans une direction de rotation (B) du disque par rapport à une direction diamétrale et/ou à la direction de rotation opposée.
  12. Combinaison d'un disque de support selon l'une quelconque des revendications 1 à 11 et d'une feuille abrasive (110) comportant une couche de tissu non tissé (134) sur la surface supérieure de la feuille abrasive destinée à être fixée sur les crochets moulés.
  13. Dispositif de ponçage électrique à disque englobant un disque de support (108) selon l'une quelconque des revendications 1 à 11.
EP20030254333 2002-07-09 2003-07-08 Dispositif de montage d'un outil de ponçage Expired - Fee Related EP1380388B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0215897A GB2390560A (en) 2002-07-09 2002-07-09 Support disc for sanding apparatus
GB0215897 2002-07-09

Publications (2)

Publication Number Publication Date
EP1380388A1 EP1380388A1 (fr) 2004-01-14
EP1380388B1 true EP1380388B1 (fr) 2005-12-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030254333 Expired - Fee Related EP1380388B1 (fr) 2002-07-09 2003-07-08 Dispositif de montage d'un outil de ponçage

Country Status (4)

Country Link
EP (1) EP1380388B1 (fr)
DE (1) DE60302944T2 (fr)
ES (1) ES2252625T3 (fr)
GB (1) GB2390560A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10357144A1 (de) 2003-12-06 2005-06-30 Robert Bosch Gmbh Schleifteller für eine Handschleifmaschine
DE102010028123A1 (de) * 2010-04-22 2011-10-27 Robert Bosch Gmbh Schleiftellervorrichtung für ein handgeführtes Schleifgerät
DE102013006612B4 (de) 2013-04-09 2016-05-25 Gebrüder Aurich GmbH Textiles Gewirk
EP3275594A1 (fr) * 2016-07-29 2018-01-31 Guido Valentini Unité de plaque de support
EP4098401A1 (fr) * 2021-06-01 2022-12-07 Hilti Aktiengesellschaft Plateau de meulage pour un disque de meulage d'une machine de meulage et procédé de fabrication
EP4098143A1 (fr) * 2021-06-01 2022-12-07 Hilti Aktiengesellschaft Insert d'outil pour la fabrication d'un objet de forme complexe, procédé de fabrication et objet de forme complexe

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2701417A1 (fr) * 1993-02-15 1994-08-19 Cifap Sa Outil abrasif rotatif comportant des moyens de refroidissement.
TW317223U (en) * 1994-01-13 1997-10-01 Minnesota Mining & Mfg Abrasive article
AU692828B2 (en) * 1994-01-13 1998-06-18 Minnesota Mining And Manufacturing Company Abrasive article, method of making same, and abrading apparatus
GB9703130D0 (en) * 1997-02-14 1997-04-02 Renwick Richard Method of attaching a cleaning pad to a machine
FR2760671B1 (fr) * 1997-03-12 1999-04-30 Abrasienne L Abrasif applique
US5945131A (en) * 1997-04-16 1999-08-31 Velcro Industries B.V. Continuous molding of fastener products and the like and products produced thereby
GB2331947A (en) * 1997-12-03 1999-06-09 Ykk Europ Ltd A sander with a two part base plate

Also Published As

Publication number Publication date
GB0215897D0 (en) 2002-08-21
ES2252625T3 (es) 2006-05-16
DE60302944D1 (de) 2006-02-02
DE60302944T2 (de) 2006-08-31
EP1380388A1 (fr) 2004-01-14
GB2390560A (en) 2004-01-14

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