EP0229755B1 - Handgeführtes schleif- oder polierwerkzeug - Google Patents

Handgeführtes schleif- oder polierwerkzeug Download PDF

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Publication number
EP0229755B1
EP0229755B1 EP85904455A EP85904455A EP0229755B1 EP 0229755 B1 EP0229755 B1 EP 0229755B1 EP 85904455 A EP85904455 A EP 85904455A EP 85904455 A EP85904455 A EP 85904455A EP 0229755 B1 EP0229755 B1 EP 0229755B1
Authority
EP
European Patent Office
Prior art keywords
hand
sanding
belt
polishing tool
tool 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
Application number
EP85904455A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0229755A1 (de
Inventor
Hans-Georg Madzgalla
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.)
Feldmuehle AG
Original Assignee
Feldmuehle 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 Feldmuehle AG filed Critical Feldmuehle AG
Priority to AT85904455T priority Critical patent/ATE38794T1/de
Publication of EP0229755A1 publication Critical patent/EP0229755A1/de
Application granted granted Critical
Publication of EP0229755B1 publication Critical patent/EP0229755B1/de
Expired legal-status Critical Current

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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
    • 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

Definitions

  • the invention relates to hand-held grinding or polishing tools which consist of a resilient support of flat bar-shaped profile which is encased by an endless grinding or polishing belt which is under tension.
  • Hand-held grinding and polishing tools consist of a carrier body on which a generally sheet-like abrasive, i.e. an abrasive cloth or an abrasive paper, is clamped. They are widely used in the form of sanding files or sanding blocks, whereby the sanding blocks can consist of rubber or cork and other elastic materials.
  • the abrasive belt holders which are in the form of a file, have a flexible, wedge-shaped blade support, and the abrasive or polishing belt is held by a holding clamp by means of a clamping screw.
  • a disadvantage of all these tools is that usually only a small part of the grinding material can be used because it is not possible to use the full stroke, e.g. B.
  • the known tools have the disadvantage that if the strip material has been overstretched by the work, retensioning is necessary, since otherwise the strip material can hook and tear. Retensioning of this kind is cumbersome and time-consuming for practically all devices, in many cases only possible to a limited extent.
  • US-A-3 699 729 shows and describes a resilient steel bracket which is enclosed by an endless grinding belt.
  • This unit is an abrasive bar, which is surrounded by tension by a sanding belt, which can be applied to the sanding bar by bending the ends of the bracket, the sanding bar optionally made of a spring steel bent into the shape of a crescent moon with a screwed-on handle - Figures 1 to 5 and the associated description - or an arcuate piece of spring steel with inward rolled end ends - Figure 6.
  • a processing of convex surfaces is possible with this sanding bar .
  • the sanding bar has convex surfaces, these cannot be used practically in FIGS. 1 to 5, since the handle by which the arc parts are connected prevents processing. Furthermore, on the opposite side there is no direct possibility for holding the sanding bar, which is particularly clearly shown in FIG. 6, where the surface on which the sanding handle could be gripped is only formed by the endless sanding belt.
  • the sanding bar according to US-A-3 699 729 also has considerable disadvantages when changing the sanding belt. It is shown in the description that by bending the crescent-shaped support body, the tension on the sanding belt is released so that it can be changed, but it is not pointed out that the belt must first be inserted into the handle before it is then after compressing the supporting body can be brought over the remaining surfaces.
  • the grinding bracket according to FR-A-830 733 is essentially similar to the pretreated US-A-3 699 729, except that it consists of a resilient steel bracket, the flat area of which is clamped between two plates forming a handle. This flat area is adjoined by two legs which, as clearly shown in FIG. 1, are convexly curved and whose ends open into round bars which are intended to prevent the strip from being destroyed in this area.
  • the invention is therefore based on the object of providing a tool which, with the possibility of fully utilizing an endless grinding belt, i.e. H. with the possibility of transporting the grinding or polishing belt on the carrier, to provide surfaces that are flat, convex and concave, so that flat, concave and convex workpieces can be machined with it.
  • the endless belt is tensioned by the spring force and in such a way that the belt is always sufficiently tensioned, even if it has lengthened when working.
  • the belt is held on the tool by its natural friction, but can still be moved in the longitudinal direction with little effort, which ensures 100% utilization of the belt material if it was only used in some areas of the tool.
  • the grinding belt can be replaced by simply pressing one or both legs together.
  • the simple handling ensures that there is no damage to the grinding or polishing belt.
  • the carrier is designed as a curved handle, to which a flat leg is resiliently connected.
  • the handle can be made of wood, metal or plastic.
  • the leg adjoining it has a flat bar-shaped profile and is resiliently connected to the handle.
  • the tool therefore has an essentially L-shaped cross section in the side view and, after the grinding or polishing belt has been applied, forms a triangle with rounded tips and a curved side.
  • This convexly curved side lies when machining workpieces in the ball of the hand, but can also be used for machining concave surfaces, just as is possible with the smaller transition radii at the upper and lower ends of the curved handle.
  • one side of the triangle is essentially formed only by the tensioned grinding belt or polishing belt.
  • the tradesman has the possibility to process curved surfaces quickly and cleanly, because by pressing the tool, the spring-loaded band takes on the shape of the workpiece in some areas without having to set a special radius on the tool.
  • the carrier is designed as a flat, arched arch connecting two legs.
  • the radius of this arc is relatively large, i. H. in any case over 100 mm. It is expedient at 150 to 250 mm, whereas the legs are flat, so that a convex surface and two flat surfaces are available for machining a workpiece.
  • the support is delimited on both sides by radii, the legs of these radii extending from the radially connected end sections in the direction of the arc. Due to the arrangement of radii at the transition from the support to the legs, these radii being relatively small and in the order of magnitude between 2 and 6 mm, the grinding or polishing belt is not kinked too sharply, so that the belt still fits neatly even with coarse grain is guaranteed. On the other hand, this means that the belt can be moved more easily in the longitudinal direction if necessary. Another advantage of this configuration is that these radii allow machining of fillets in workpieces.
  • An advantageous embodiment of the invention provides that the length of the carrier delimited by the radii is greater than the total length of the legs. Because the sum of the leg lengths is smaller than the length of the carrier, it is possible to move the legs far inward, in order to thereby more easily apply the grinding or polishing belt to the tool.
  • the application is further simplified by connecting the radii to the legs Can capture end sections and press against each other, whereby the legs are brought closer to each other and thus reduces the scope of the grinding or polishing tool.
  • the carrier and the legs advantageously consist of the same resilient material. Both natural and synthetic rubber materials can be used as the resilient material.
  • elastomers e.g. B. polyurethane, which can be cast in the appropriate configuration.
  • glass fiber reinforced plastic especially polyester, has also proven itself. The shape of the tool must be adapted to the plastic used so that the desired resilient effect is achieved.
  • the resilient material is a steel strip.
  • This steel strip is generally a spring steel, as it is for.
  • B. is commercially available under the VDEH designation CK 53, CK 60, CK 67, MK 75, MK 101, alloyed steels being used for cases in which the tool comes into contact with moisture or possibly acids and alkalis how they z.
  • B. under the VDEH designation 67 SICR 5, 50 CRV 4, 58 CRV 4, 12 CrNi 17 7 are known in the trade.
  • an elastic intermediate layer is arranged at least in partial areas between the grinding or polishing belt.
  • This intermediate layer can expediently consist of foam or foam rubber in the form of an endless band, but it is also possible to firmly bond the intermediate layer to the carrier and / or the legs, in which case cork surfaces have proven to be particularly suitable.
  • the polishing belt consists of an endless felt or textile belt, i.e. That is, after the grinding belt has been exchanged for the polishing belt with the same hand tool, the surface which has been ground first can be treated with polishing pastes.
  • the support acting on the legs is formed by an arch 5, which is embodied as a convex arch 5 in FIGS. 1 to 3 and as a concave arch 5 in FIG.
  • the right radius 2 and the left radius 3 adjoin this arc 5.
  • Both radii 2, 3 open into the legs 1, which are connected to the end sections 8 via curves 7.
  • both the arch 5 and the legs 1 with the radii 2 and 3 and the curves 7 consist of a resilient steel strip, i.e. that is, the complete carrier consists of one and the same material.
  • FIG. 5 The situation is similar with the tool shown in FIG. 5, which also consists of a uniform material. In this case, however, it is not a steel, but an elastic plastic, preferably Vulkollan.
  • a circumferential web 12 in the width of the grinding or polishing belt 6 surrounds the base body 13, which has the eyes 14, which are used to pull the sheet 5 together and thereby flex it more strongly.
  • Figures 6 and 7 show L-shaped structures as a grinding or polishing tool, the carrier being formed by the handle 4, to which a leg 1 is connected.
  • this is a leg 1 which, like the handle 4, consists of a glass fiber-reinforced polyester resin, whereas according to FIG. 7 the leg 1 is a steel strip which is encapsulated by a thermoplastic in the region of the handle 4 .
  • a foam rubber belt 9 is shown in this figure, which is arranged as an intermediate layer between the grinding or polishing belt 6 and the tool and was also designed as an endless belt. As already explained above, this foam rubber band 9 serves to be able to apply a softer pressure to the workpiece. Something similar is achieved, as shown in FIG. 4, with the cork surfaces 10 applied to the legs 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Passenger Equipment (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Lubricants (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Massaging Devices (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
EP85904455A 1984-09-17 1985-09-14 Handgeführtes schleif- oder polierwerkzeug Expired EP0229755B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85904455T ATE38794T1 (de) 1984-09-17 1985-09-14 Handgefuehrtes schleif- oder polierwerkzeug.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8427392U 1984-09-17
DE19848427392U DE8427392U1 (de) 1984-09-17 1984-09-17 Schleif- und polierwerkzeug

Publications (2)

Publication Number Publication Date
EP0229755A1 EP0229755A1 (de) 1987-07-29
EP0229755B1 true EP0229755B1 (de) 1988-11-23

Family

ID=6770783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85904455A Expired EP0229755B1 (de) 1984-09-17 1985-09-14 Handgeführtes schleif- oder polierwerkzeug

Country Status (13)

Country Link
US (1) US4688356A (ko)
EP (1) EP0229755B1 (ko)
JP (1) JPS62500228A (ko)
KR (1) KR860700226A (ko)
AT (1) ATE38794T1 (ko)
AU (1) AU571747B2 (ko)
BR (1) BR8507242A (ko)
DE (2) DE8427392U1 (ko)
DK (1) DK226086D0 (ko)
ES (1) ES296148Y (ko)
FI (1) FI871024A0 (ko)
NO (1) NO861718L (ko)
WO (1) WO1986001762A1 (ko)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5082009A (en) * 1989-08-28 1992-01-21 Cromer Marsha J Hand-held foot callus remover
US5168663A (en) * 1989-09-01 1992-12-08 David Zehr Hand-held sanding device
US5042104A (en) * 1990-06-29 1991-08-27 Martin Rodger L Wiping tool for cleaning ceiling tile grid structures
US5177909A (en) * 1990-10-15 1993-01-12 Klocke Kenneth J Hand-held sanding device
US5387251A (en) * 1994-05-02 1995-02-07 Rouse; Evan D. Endless belt sanding block
US5582543A (en) * 1995-06-07 1996-12-10 Maruyama; Sho Abrading device
GB2398260B (en) * 2003-02-13 2007-09-05 John Fredrick Cooke Hand sander
US7048618B1 (en) 2004-09-13 2006-05-23 Cramer David K Tool having an adjustable curved working surface and a method for using the tool
US8011998B2 (en) * 2007-04-12 2011-09-06 Lamarche Paul Expansible sanding block exhibiting oblique extending surfaces
US8231440B2 (en) * 2007-04-12 2012-07-31 Lamarche Paul Expansible sanding block exhibiting oblique extending surfaces
US8210909B2 (en) * 2008-03-24 2012-07-03 Robert Bosch Gmbh Abrading system
US20100275949A1 (en) * 2008-09-22 2010-11-04 Ruhge Forrest R Ultrasonic coating removal method
US20110177761A1 (en) * 2010-01-20 2011-07-21 Ronald Mastro Sanding Tape Clip and Methods of Use
DE102013003043A1 (de) * 2013-02-22 2014-08-28 Steffen Homann Vorrichtung zur mechanischen Oberflächenbearbeitung von Teilen
JP6519375B2 (ja) * 2015-07-23 2019-05-29 中国電力株式会社 電線表面の磨き工具、及び電線表面の研磨方法
EP3666461A1 (en) * 2018-12-12 2020-06-17 3M Innovative Properties Company Abrasive article

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR830733A (fr) * 1937-03-26 1938-08-08 Balais Et Brosses A Reservoir Polissoir
US2493852A (en) * 1948-06-01 1950-01-10 Merit Products Inc Sanding block
US2547837A (en) * 1949-08-27 1951-04-03 Robbins Elmer Abrading tool
US2742744A (en) * 1954-03-19 1956-04-24 Earl C Applegate Hand tools
US3063208A (en) * 1961-03-17 1962-11-13 William A Bell Sanding block
US3106806A (en) * 1962-04-02 1963-10-15 Alma A Hutchins Work smoothing tool
US3699729A (en) * 1971-05-14 1972-10-24 Carrier Craft Corp Sanding hand tool
US4242843A (en) * 1978-12-04 1981-01-06 Phillips Jerry L Expandable sanding block for endless wrap around abrasive belts
US4525959A (en) * 1981-05-26 1985-07-02 Ziebarth Warren S Abrasive finishing tool
GB2114028A (en) * 1982-02-04 1983-08-17 Plas Plugs Ltd Improvements in or relating to abrasive hand tools
AU2311084A (en) * 1983-01-17 1984-07-19 Harold Hilton Meyers Abrasive sheet holder

Also Published As

Publication number Publication date
JPS62500228A (ja) 1987-01-29
EP0229755A1 (de) 1987-07-29
US4688356A (en) 1987-08-25
FI871024A (fi) 1987-03-09
NO861718L (no) 1986-04-30
AU571747B2 (en) 1988-04-21
FI871024A0 (fi) 1987-03-09
DK226086A (da) 1986-05-15
ES296148U (es) 1987-12-16
DK226086D0 (da) 1986-05-15
DE3566364D1 (en) 1988-12-29
ES296148Y (es) 1988-05-16
AU4861285A (en) 1986-04-08
DE8427392U1 (de) 1984-12-13
WO1986001762A1 (en) 1986-03-27
ATE38794T1 (de) 1988-12-15
KR860700226A (ko) 1986-08-01
BR8507242A (pt) 1987-10-27

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