EP0406540B1 - Couteau de forme en U avec lame droite - Google Patents

Couteau de forme en U avec lame droite Download PDF

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Publication number
EP0406540B1
EP0406540B1 EP90108704A EP90108704A EP0406540B1 EP 0406540 B1 EP0406540 B1 EP 0406540B1 EP 90108704 A EP90108704 A EP 90108704A EP 90108704 A EP90108704 A EP 90108704A EP 0406540 B1 EP0406540 B1 EP 0406540B1
Authority
EP
European Patent Office
Prior art keywords
blade
cutting edge
knife
cutting
axis
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
EP90108704A
Other languages
German (de)
English (en)
Other versions
EP0406540A1 (fr
Inventor
Johann Wilhelm Dipl.Ing. Mütter
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.)
Muetter Wilhelm
Original Assignee
Muetter Wilhelm
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 Muetter Wilhelm filed Critical Muetter Wilhelm
Priority to AT90108704T priority Critical patent/ATE100014T1/de
Publication of EP0406540A1 publication Critical patent/EP0406540A1/fr
Application granted granted Critical
Publication of EP0406540B1 publication Critical patent/EP0406540B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B7/00—Hand knives with reciprocating motor-driven blades

Definitions

  • the present invention relates to a knife for cutting adhesive beads, for example on motor vehicle windshields, which is designed such that it can be set into an oscillatory rotary movement for cutting by an actuating tool, consisting of a metal part which, when projected into a axis of rotation of the plane containing oscillatory motion appears U-shaped, one U-leg being provided for attachment to the actuating tool and the other U-leg being designed as a blade and having at least one cutting edge, and wherein the blade and attachment leg at the base points of the U-shape are connected to each other via a web.
  • an actuating tool consisting of a metal part which, when projected into a axis of rotation of the plane containing oscillatory motion appears U-shaped, one U-leg being provided for attachment to the actuating tool and the other U-leg being designed as a blade and having at least one cutting edge, and wherein the blade and attachment leg at the base points of the U-shape are connected to each other via a web.
  • U-shaped angled knives are known from document EP-A-0 174 427. They are used in particular to cut adhesive beads on motor vehicle windshields.
  • a disadvantage of this U-shaped knife with a sickle-shaped curved blade is that the manufacture of the curved blade and in particular the formation and sharpening of the correspondingly curved cutting edges is relatively complex.
  • the present invention has for its object to provide a U-shaped angled knife with the features mentioned, the blade is easier and cheaper to produce compared to the curved blades essentially the same good cutting properties.
  • a cutting edge of the blade is straight and, seen in plan view parallel to the axis of the oscillatory rotary movement, inclined to a line from the axis of rotation to the base point of the cutting edge.
  • This blade which is comparatively simple in terms of shape and can also be sharpened very easily and with simple means, has surprisingly good cutting properties and can certainly be measured with the conventional knives which have curved blades.
  • the engagement length is considerably shorter than with a blade that has a sickle-shaped blade. As a result, the operator has to use less force to cut the adhesive connection.
  • An embodiment of the invention is preferred in which, in a plan view parallel to the axis of rotation, the outer edges of the fastening leg converge in a known manner in a V-shape towards the base region, the cutting edge of the blade running parallel to one of the outer edges of the fastening leg.
  • the present invention is based on already known knives in which the outer edges of the fastening leg run in a V-shape at an angle between 30 and 40 °.
  • the angle at which the cutting edge of the blade extends relative to the line of rotation-base point of the cutting edge then corresponds essentially to half the angle between the outer edges of the fastening leg.
  • the cutting edge is predominantly straight, that is to say over the major part of its length, the cutting edge is nevertheless rounded at the tip of the blade in accordance with the preferred embodiment of the invention. This allows better insertion and penetration into the adhesive bead at the beginning of a cutting process.
  • an embodiment of the invention is preferred in which the internal angle between the fastening leg and the web is greater than 90 °.
  • the inner angle between the web and the blade should be essentially 90 °.
  • an embodiment of the invention is preferred in which the blade has cutting edges on both sides. These are in accordance with the straight blade shape, generally parallel to one another, but can also be inclined to one another.
  • the cutting edges merge into one another approximately in a semicircular arc at the blade tip.
  • Such a blade with cutting edges present on both sides allows the knife to be guided and cut with it in both directions, the knife also running with relatively little vibration.
  • the blade has a knife back on the side opposite the cutting edge.
  • a knife back can increase the cutting pressure in the direction of the cutting edge.
  • the U-shape of the knife When projected into a plane which contains the axis of rotation 4 of the knife, the U-shape of the knife can be seen, the fastening leg 1 of which is connected to the blade 2 via a web 3. While the angle between blade 2 and web 3 is approximately 90 °, the inside angle between web 3 and fastening leg 1 is greater than 90 °.
  • the knife When cutting, the knife performs oscillatory rotary movements around the axis of rotation 4.
  • the fastening leg 1 and thus also the web 3 and the blade 2 are moved back and forth in a circular sector around the axis of rotation 4.
  • the cutting edge 5 of the blade 2 runs inclined to the connecting line 9 between the axis of rotation 4 and the base point of the cutting edge 5, which lies in the region of the transition from the web 3 to the blade 2.
  • a further cutting edge 5 ' runs parallel to the cutting edge 5, the straight cutting edges 5, 5' being connected to one another via a semicircularly curved cutting edge 5 'at the tip of the blade 2.
  • the cutting edges 5, 5 ' run in plan view parallel to an outer edge 6 of the fastening leg 1, the outer edges 6, 6' V-shaped toward the web 3 towards each other.
  • the fastening leg 1 On the side facing away from the web 3, the fastening leg 1 has a fastening opening 7 with a star-shaped serrated or corrugated edge 8, a suitably shaped counterpart on an actuating tool being able to engage in the opening 7 in a form-fitting manner.
  • the inclination of the cutting edge 5 to the connecting line 9 can of course be varied within a wide range and also depends, among other things, on the stroke of the oscillatory rotary movement, with the angle between the cutting edge 5 and the connecting line 9 being larger with a larger stroke, not around the cutting edge 5 only to be pressed into the adhesive bead, but also to achieve a pulling cutting movement.
  • fastening leg 9 and an actuating tool are also conceivable and possible, the fastening leg 1 not having to have the V-shaped basic shape shown in FIG. 1, so that the cutting edges 5, 5 'are not necessarily parallel to one of the outer edges 6, 6 'of the fastening leg 1 must run.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Claims (10)

  1. Couteau pour détacher des bourrelets de colle, par exemple sur le pare-brise de véhicules à moteur, conçu de façon à pouvoir, pour permettra la coupe, être déplacé par un outil d'actionnement pour prendra un mouvement de rotation oscillant, constitué d'une pièce métallique ayant la forme d'un U en projection dans un plan contenant l'axe de rotation (4) du mouvement oscillant, l'une dos branches (1) du U étant destinée à être fixée à l'outil d'actionnement, et l'outre branche du U étant conçue comme une lame (2), et comportant au moins un tranchant (5, 5'), la lame (2) et la branche de fixation (1) étant, en las points de base du U, reliées l'une à l'autre par une traverse (3), caractérisé en ce qu'un tranchant (5, 5') de la lame (2) est rectiligne et, en vue de dessus, quand on regarde parallèlement à l'axe (4) du mouvement de rotation oscillant, est incliné par rapport à une ligne (9) allant de l'axe (4) au point de base du tranchant (5).
  2. Couteau selon la revendication 1, dans lequel, en vue de dessus parallèle à l'axe de rotation, les bords extérieurs (6, 6') de la branche de fixation (1) convergent en V vers la zone des points de base, caractérisé on ce que le tranchant (5, 5'), en vue de dessus, est parallèle à l'un des bords extérieurs (6) de la branche de fixation (1).
  3. Couteau selon la revendication 1 ou 2, caractérisé en ce que le tranchant (5'') est arrondi au niveau de l'extrémité de la lame.
  4. Couteau selon l'une des revendications 1 à 3, caractérisé en ce que l'angle intérieur entre la branche de fixation (1) et la traverse (3) est supérieur à 90°.
  5. Couteau selon la revendication 4, caractérisé en ce que l'angle intérieur entre la lame (2) et la traverse (3) est d'environ 90°.
  6. Couteau selon l'une des revendications 1 à 5, caractérisé en ce que la lame (2) comporte sur ses deux côtés des tranchants (5, 5').
  7. Couteau selon la revendication 6, caractérisé en ce que les tranchants (5, 5') se poursuivent l'un dans l' autre en formant un demi cercle (5'') au niveau de l'extrémité de la lame.
  8. Couteau selon l'une des revendications 1 à 5, caractérisé on ce qui la lame (2) présente, sur le côté opposé au tranchant (5), un dos de couteau.
  9. Couteau selon l'une des revendications 1 à 8, caractérisé en ce que la traverse (3) présente un arrondi sur le côté opposé au couteau.
  10. Couteau selon l'une des revendications 1 à 9, caractérisé en ce qu'au moins l'un des tranchants (5, 5') présente une denture en dents de scie.
EP90108704A 1989-06-21 1990-05-09 Couteau de forme en U avec lame droite Expired - Lifetime EP0406540B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90108704T ATE100014T1 (de) 1989-06-21 1990-05-09 U-foermiges messer mit gerader klinge.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8907586U DE8907586U1 (de) 1989-06-21 1989-06-21 Messer zum Auftrennen von Klebewulsten
DE8907586U 1989-06-21

Publications (2)

Publication Number Publication Date
EP0406540A1 EP0406540A1 (fr) 1991-01-09
EP0406540B1 true EP0406540B1 (fr) 1994-01-12

Family

ID=6840332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108704A Expired - Lifetime EP0406540B1 (fr) 1989-06-21 1990-05-09 Couteau de forme en U avec lame droite

Country Status (5)

Country Link
EP (1) EP0406540B1 (fr)
AT (1) ATE100014T1 (fr)
DE (2) DE8907586U1 (fr)
DK (1) DK0406540T3 (fr)
ES (1) ES2047750T3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8423004U1 (de) * 1984-08-02 1984-10-31 C. & E. Fein Gmbh & Co, 7000 Stuttgart Schneidmesser zum durchtrennen der klebeschicht einer angeklebten scheibe
DE3626762A1 (de) * 1986-08-07 1988-02-11 Wilhelm Muetter Oszillierendes trennmesser mit koaxialem schaft
DE3712707A1 (de) * 1987-04-14 1988-11-03 Chicago Pneumatic Zweigniederl Messereinsatz
DE3719073A1 (de) * 1987-06-06 1988-12-15 Fein C & E Schneidwerkzeug

Also Published As

Publication number Publication date
ES2047750T3 (es) 1994-03-01
ATE100014T1 (de) 1994-01-15
DK0406540T3 (da) 1994-02-14
EP0406540A1 (fr) 1991-01-09
DE59004195D1 (de) 1994-02-24
DE8907586U1 (de) 1989-08-03

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