EP1209999B1 - Farbkratzer - Google Patents

Farbkratzer Download PDF

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Publication number
EP1209999B1
EP1209999B1 EP00946675A EP00946675A EP1209999B1 EP 1209999 B1 EP1209999 B1 EP 1209999B1 EP 00946675 A EP00946675 A EP 00946675A EP 00946675 A EP00946675 A EP 00946675A EP 1209999 B1 EP1209999 B1 EP 1209999B1
Authority
EP
European Patent Office
Prior art keywords
cutting insert
screw
hole
insert
contact surface
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 - Lifetime
Application number
EP00946675A
Other languages
English (en)
French (fr)
Other versions
EP1209999A1 (de
Inventor
Sture BÄCKMAN
Andreas Eriksson
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.)
Kapman AB
Original Assignee
Kapman AB
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 Kapman AB filed Critical Kapman AB
Publication of EP1209999A1 publication Critical patent/EP1209999A1/de
Application granted granted Critical
Publication of EP1209999B1 publication Critical patent/EP1209999B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/02—Scraping
    • A47L13/08—Scraping with scraping blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
    • B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
    • B44D3/16—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning
    • B44D3/162—Scrapers
    • B44D3/164—Scrapers comprising blades

Definitions

  • scrapers For removal of old paint or rust from surfaces by scraping, it is since long known to use scrapers with replaceable cutting inserts, which are provided with holes for fastening with a screw, as in, for instance, US Patent 1,940,107 and 4,768,254 or with a threaded pin and a nut.
  • the cutting inserts are most often rectangular or triangular, as in, for instance, US Patent 4,768,254 , but it is also known to make scrapers with a circular cutting insert for scraping of concave mouldings, or with two adjacent cutting inserts for scraping and deburring of edges. Cutting inserts with different profiles or radii of curvature are disclosed in US Patent 1,940,107 , and SE Patent 94 04 143-1 .
  • the present invention relates to a type of cutting insert mounting which may be used for paint scrapers with replaceable, relatively thin especially formed cemented carbide cutting inserts and a paint scraper adapted thereto.
  • a primary object of the present invention is to define a scraper, the cutting insert mounting of which permits usage of thin cemented carbide cutting inserts with minimised risk of cracks and damage on the cemented carbide cutting insert.
  • Another object is to define a scraper with the possibility of locking the cutting insert in different positions.
  • An additional object is to define a scraper that permits mounting of cemented carbide cutting inserts having different shape and profile.
  • Still another object is to define a scraper, the cutting edge of which is turnable for operation in different working directions.
  • a paint scraper according to the invention as it is shown in figures 1 and 2 has four different main parts, a front portion or a supporting part 11 with an insert position 22, an edge-provided plane cemented carbide cutting insert 13, a hand grip 12 and a screw 14.
  • the front surface of the supporting part is at an-angle ⁇ exceeding 90 degrees in relation to the centre line, CL, of the scraper and the handle.
  • the front surface is formed by two parallel plane surfaces 21, 22 spaced apart by a step 20.
  • the lower situated surface 22 is provided with a threaded hole in order to fasten, with a screw 14, a cemented carbide cutting insert 13 provided with a hole 15.
  • the cemented carbide cutting insert may either be in the shape of a polygon e.g. a triangle or a rectangle or have different profiles with radii in both convex and concave shapes. It may also have shapes that are combinations of straight lines, angles and radii. Drop-shape, elliptical or cylindrical shapes are also feasible embodiments of the cutting insert.
  • the step 20 consists of two plane surfaces spaced apart by a V-shaped recess 23.
  • the step gives the cutting insert support and absorbs pressure forces so that the screw joint is not unnecessarily overloaded and gives at the same time a good stability to the cutting insert.
  • the shape of the step enables a triangular equilateral cutting insert to be locked in six different positions. Furthermore, the step blocks rotation of cutting insert shapes having projecting corners.
  • the cutting insert is fastened to the insert position of the supporting part with a screw, the head 16 of which in cross-section has a concavely shaped underside.
  • the contact surface 17 between screw head and cutting insert becomes ring-shaped and located at a distance from the centre line of the screw which exceeds the radius of the hole 15 and which preferably should be at least 50 % larger than said radius.
  • concave shape of the underside of the screw head all types of geometries are included which give the above, described ring-shaped contact surface or give contact at at least three points at a distance from the centre of the screw exceeding the radius of the hole with at least 50 %.
  • the screw head may, for instance, be made with an annular recess. It may also be provided with a loose, ring-shaped spacing washer, centered by the screw in a suitable way, which washer gives the corresponding effect.
  • the cutting insert gets a much better support than if it would be mounted with a usual screw joint, which may imply a risk that the cemented carbide cutting insert would break close to the hole.
  • the thickness of the cutting insert may be reduced, which gives economical advantages at the same time as the cutting insert requires less force to penetrate into the work surface and thereby cuts more efficiently without unnecessarily exhausting hands and arms.
  • the elongate and thin shape of the scraper in combination with an insert position that permits fastening of relatively small cutting inserts in different positions make it especially adapted for precision work, also in narrow spaces.
  • the shank 18 of the screw may suitably be made with a thread, which has been provided with a friction-increasing thread profile, for instance non-cylindrical or asymmetrical. This is done to make sure that the cutting insert should not run the risk of coming loose and be exposed to vibrations, which may cause damage on the cutting insert.
  • the ratio between the size of the hole and the thickness of the cutting insert should be such that the cutting insert has a thickness which is not larger than the radius R1 of the hole or at least is less than 60 % of the diameter of said hole.
  • the cutting insert may advantageously be turned and mounted reversedly in the insert position. Normally, the scraper is pulled towards the user at scraping, but thanks to this reverse mounting of the cutting insert, the scraper may also be pushed away from the user, which may be an advantage in narrow passages such as at interior corners on mouldings.
  • the supporting part is formed with a shoulder or a finger grip where it is possible to rest the thumb or another suitable finger in order to increase the stability of the scraper and at the same time give additional pressure against the cutting insert so that the cutting edge more easily penetrates into the work surface.
  • the cone-shaped and ergonomic shape of the handle enables a very good grip to pull the scraper towards you.
  • In the thicker end of the grip there is a projecting shoulder-shaped part 23, which gives a good support against the hand.
  • This together with the soft elastic material, which the hand grip is covered with, in combination with the ribbed design on the underside, gives an improved grip.
  • the cone-shaped contact surface 19 of the hand grip in combination with the projecting shoulder of the supporting part as well as the fact that the location of the cutting insert is close to the centre line CL of the tool gives a possibility to store the tool in a holder with a cone-shaped inner surface, which constitutes an extension of the tangent surface 19, and which then grips the cone-shaped handle of the tool at the same time as the shoulder of the supporting part gives support and ensures that the cutting insert lies clear inside the holder.
  • the position of the scraper at storage in the holder is outlined in figure 1 where the inner contour of the holder is shown in the form of two dashed lines symmetrically converging around the centre line CL of the scraper.
  • Such a holster may easily be worn, for instance, in the belt and allows that the scraper is easy to reach without injuring the user on the cutting insert, at the same time as the tool is protected.
  • the holster is suitably made with a hole at the bottom so that it easily may be cleaned from paint residues etc.
  • the handgrip part of the scraper is, in the thicker free end, provided with a hole for hanging up the tool.

Landscapes

  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Milling Processes (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Luminescent Compositions (AREA)
  • Steroid Compounds (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Claims (8)

  1. Kratzer zum Entfernen von Farbe, Beschichtung oder Rost, einschließlich eines Stützteils (11) mit einem Handgriff (12) und einem ersetzbaren ebenen Hartmetallschneideinsatz (13), der ein Loch (15) aufweist, wobei der Einsatz an einer Einsatzposition auf dem Stützteil (11) mit einer Schraube (14) befestigt ist, wobei der Schaft (18) der Schraube das Loch (15) im Schneideinsatz (13) durchdringt und der Schneideinsatz (13) und die Schraube (14) über eine Kontaktfläche (17) miteinander wechselwirken, dadurch gekennzeichnet, daß die Schraube (14) mit einem Kopf (16) mit solch einer Form hergestellt ist, daß die Kontaktfläche (17) von dem Schaft (18) der Schraube getrennt ist und mit einem radialen Abstand vom Zentrum des Loches mit einem Radius (R2), der den Radius (R1) des Loches (15) übersteigt, beabstandet ist
  2. Kratzer nach Anspruch 1, dadurch gekennzeichnet, daß der Kopf (16) der Schraube eine Unterseite hat, deren Kontur im Querschnitt eine konkave Form hat, so daß die Kontaktfläche (17) über dem Schneideinsatz ringförmig wird.
  3. Kratzer nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß, die Kontaktfläche (17) auf einem Radius (R2) liegt, der zumindest um 50 % größer als der Radius (R1) des Loches ist.
  4. Kratzer nach Anspruch 1, dadurch gekennzeichnet, daß der Schneideinsatz eine Dikke von weniger als 60 % des Lochdurchmessers hat.
  5. Kratzer nach Anspruch 1, dadurch gekennzeichnet, daß der Schaft (18) der Schraube mit einem Reibung erhöhenden Gewindeprofil ausgestattet ist.
  6. Kratzer nach Anspruch 1, dadurch gekennzeichnet, daß der Handgriff (12) eine konusförmige Kontaktfläche (19) aufweist für das Klemmen in einem Halter und daß die Einsatzposition so nahe an der Mittellinie des Handgriffes (12) ist, daß der gesamt Schneideinsatz (13) innerhalb einer konusförmigen Fläche positioniert ist, die eine Erweiterung der Kontaktfläche bildet
  7. Kratzer nach Anspruch 1, dadurch gekennzeichnet, daß die Einsatzposition von einer Stufe (20) umgeben ist, wobei die Form der Stufe die Drehung der Schneideinsätze mit vorstehenden Ecken blockiert.
  8. Kratzer nach Anspruch 1, dadurch gekennzeichnet, daß die Stufe (20) mit einer Ausnehmung (23) die Montage eines dreieckigen Schneideinsatzes in sechs Positionen erlaubt.
EP00946675A 1999-07-01 2000-06-29 Farbkratzer Expired - Lifetime EP1209999B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9902500 1999-07-01
SE9902500A SE514272C2 (sv) 1999-07-01 1999-07-01 Färgskrapa
PCT/SE2000/001383 WO2001001842A1 (en) 1999-07-01 2000-06-29 Paint scraper

Publications (2)

Publication Number Publication Date
EP1209999A1 EP1209999A1 (de) 2002-06-05
EP1209999B1 true EP1209999B1 (de) 2008-08-20

Family

ID=20416319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00946675A Expired - Lifetime EP1209999B1 (de) 1999-07-01 2000-06-29 Farbkratzer

Country Status (7)

Country Link
EP (1) EP1209999B1 (de)
AT (1) ATE405205T1 (de)
DE (1) DE60039991D1 (de)
ES (1) ES2307519T3 (de)
PT (1) PT1209999E (de)
SE (1) SE514272C2 (de)
WO (1) WO2001001842A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7174599B2 (en) 2003-06-19 2007-02-13 Stiles Ronnie J Ergonomic shielding tool for processing a surface
GB201003169D0 (en) * 2010-02-25 2010-04-14 Winwrights Ltd Hand held scraper with wear resistant tip

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1473546A (en) * 1919-04-22 1923-11-06 Eiermann William Weighted scraper
US1964947A (en) * 1933-11-13 1934-07-03 Clarke Sanding Machine Company Hand scraper
US2238957A (en) * 1939-04-15 1941-04-22 Harry H Warner Scraper
US5027512A (en) * 1990-05-09 1991-07-02 Andrews Edward A Manual cutter insert tool
SE9404143L (sv) * 1994-11-30 1995-10-23 Sandvik Ab Skrapa för avlägsnande av färg eller rost
DE19549191C1 (de) * 1995-12-30 1997-03-13 Rwe Energie Ag Freileitungsmast aus Stahlprofil-Gitterstäben und Verfahren zur Einrichtung von hochvorgespannten geschraubten Verbindungen an einem Freileitungsmast
US5665169A (en) * 1996-03-21 1997-09-09 Lisle Corporation Scraping tool and method of use

Also Published As

Publication number Publication date
SE9902500L (sv) 2001-01-02
SE514272C2 (sv) 2001-01-29
EP1209999A1 (de) 2002-06-05
ES2307519T3 (es) 2008-12-01
PT1209999E (pt) 2008-09-30
SE9902500D0 (sv) 1999-07-01
ATE405205T1 (de) 2008-09-15
DE60039991D1 (de) 2008-10-02
WO2001001842A1 (en) 2001-01-11

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