EP0705667B1 - Couteau pour des travaux de coupe fine comme dans des buts graphiques ou analogues - Google Patents

Couteau pour des travaux de coupe fine comme dans des buts graphiques ou analogues Download PDF

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Publication number
EP0705667B1
EP0705667B1 EP95112072A EP95112072A EP0705667B1 EP 0705667 B1 EP0705667 B1 EP 0705667B1 EP 95112072 A EP95112072 A EP 95112072A EP 95112072 A EP95112072 A EP 95112072A EP 0705667 B1 EP0705667 B1 EP 0705667B1
Authority
EP
European Patent Office
Prior art keywords
projection
centring
base
oblong
blade
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
EP95112072A
Other languages
German (de)
English (en)
Other versions
EP0705667A1 (fr
Inventor
Wolfgang Schleicher
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.)
Martor KG
Original Assignee
Martor Argentax EH Beermann KG
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 Martor Argentax EH Beermann KG filed Critical Martor Argentax EH Beermann KG
Publication of EP0705667A1 publication Critical patent/EP0705667A1/fr
Application granted granted Critical
Publication of EP0705667B1 publication Critical patent/EP0705667B1/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
    • B26B5/00—Hand knives with one or more detachable blades

Definitions

  • the invention relates to a knife for fineblanking work or the like for graphic purposes. according to the preamble of claim 1.
  • a knife is previously known from DE-GM 81 12 694.
  • the blade receptacle arranged at the front end of the handle body is designed as a rod-shaped extension, from which a base surface for supporting an interchangeable blade and, in the curved groove region approximately at a parallel distance from the base surface, an overlapping pin are cut out in its longitudinal section plane along an approximately hairpin-shaped external groove .
  • An elongated centering protrusion protrudes from the base surface on both sides of the hairpin-shaped outer groove, which represents a narrow oval contoured shoulder at the rear.
  • the blade receptacle forms a separate rear area of the base surface, which, starting from the oval contoured shoulder, rises up to the handle handle.
  • the scalpel-like interchangeable blade which contains a central elongated hole with two shoulders, is attached as follows:
  • the interchangeable blade, with its rear, wider elongated hole area is inserted like a drawer from front to back into the hairpin-shaped external groove and until it stops pushed behind. After that the narrower elongated hole area lies in the hairpin-shaped groove, while an overlapping pin extends over the front narrow groove end to the blade tip towards the front.
  • the rear oval end region of the elongated hole positively engages over the oval contoured rear end of the centering projection.
  • the rear area of the interchangeable blade rests on the separate rising surface area of the base surface such that the interchangeable blade is elastically pretensioned overall along a flat arc and presses with the wider oval end of its elongated hole against the oval contoured end of the centering projection.
  • the blade change in the knife according to DE-GM 81 12 694 is quite cumbersome: The rear area of the interchangeable blade must be raised above the oval-shaped end of the centering projection and the blade then pushed forward out of engagement with the hairpin-shaped groove. The insertion of a new blade is carried out in the reverse manner as described above.
  • the invention has for its object to design the known knife so that it allows a quick, uncomplicated, the risk of cuts to a large extent avoiding blade changes.
  • the base surface overall represents a plane that the centering projection has a trapezoidal cross-section tapering from its elongated apex surface to the base surface, that from the front onto the centering projection a holding shoe forming the overlapping holder with an undercut trapezoidal groove corresponding to the trapezoidal cross section of the centering projection can be pushed on in the longitudinal direction of the handle, and that it can be pushed on with its underside facing the base surface rests on the upper broad surface of the knife blade.
  • the interchangeable blade which has, for example, an elongated hole, is placed from above over the elongated centering projection on the base surface and then the holding shoe is pushed on from the front to the back until it stops.
  • the dimensional tolerances and fits are selected so that the underside of the holding shoe, which expediently forms a flat surface surrounding the undercut trapezoidal groove and parallel to the base surface, is firmly against the upper broad side of the interchangeable blade.
  • the interchangeable blade is therefore immovably held in the blade holder according to the invention, which also allows a quick, harmless blade change because of the handling described above.
  • the preamble of the independent claim 2 is also based on DE-GM 81 12 694 and also relates to the known features, according to which the centering projection is assigned at least one overlapping bracket which serves to fix the interchangeable blade which has an overlapping pin projecting from the centering projection, pointing towards the blade tip and delimiting an undercut.
  • the base surface as a whole represents a plane that the centering projection tapers from its elongated apex surface to the base surface
  • Trapezoidal cross-section has that from the front on the centering projection a holding shoe forming an overlapping bracket with an undercut trapezoidal groove corresponding to the trapezoidal cross-section of the centering projection can be pushed on in the longitudinal direction of the handle, that the retaining shoe with its base surface facing the upper broad surface of the knife blade, and that the overlap is at the bottom completely pushed-on holding shoe overlaps a locking threshold formed by the holding shoe at the front end of the trapezoidal groove and approximately parallel to the base surface.
  • the overlapping spigot known per se from DE-GM 81 12 694 according to the invention is assigned to the centering projection in such a way that the overlapping spigot, when the holding shoe is completely pushed on, is approximately parallel to the base surface and is formed at the front end of the trapezoidal groove , Engages over the latch threshold.
  • the holding shoe is given a additional protection against opening of the holding gap accommodating the interchangeable blade during cutting work that requires a greater cutting force.
  • a relatively easy sliding on when the holding shoe is firmly seated in its end position pushed onto the centering projection is achieved in a further embodiment of the invention in that the elongated apex surface of the centering projection increases from front to back and the depth of the undercut trapezoidal groove in a corresponding manner from front to back increases.
  • the rise of the elongated apex surface and the corresponding recess of the undercut trapezoidal groove can be designed according to the invention in such a way that the elongated apex surface of the centering protrusion initially runs approximately parallel to the base surface over an axial region, then rises and in the end increases less or runs parallel to the base surface.
  • the blade receptacle according to the invention allows a firm clamping fit of the holding shoe on the centering projection and at the same time a firm contact of the underside of the retaining shoe on the upper broad side of the interchangeable blade by the choice of the fits and the tolerances
  • the invention provides for the trapezoidal groove and centering projection on their in certain applications form releasably interlocking snap locking means at the rear end regions, which at least make it more difficult to inadvertently move the holding shoe in the release direction.
  • the snap locking means can be designed such that the trapezoidal groove has at its rear end a locking projection protruding from the base of the groove, which cooperates with a locking recess provided at the rear end of the elongated apex surface of the centering projection.
  • the locking projection in its transition to the base surface has on each of its two longitudinal sides a spacer bar, the transverse extent of which is measured transversely to the longitudinal axis of the handle, approximately equal to half the taper of the locking projection is.
  • the spacer bars therefore ensure that the interchangeable blade sits without play transversely to the long axis of the elongated centering opening.
  • the invention provides that the rear region of the holding shoe is designed as a push handle handle. This arrangement is favorable because it does not obstruct the user's view of the knife blade.
  • a knife is designated by the reference number 10.
  • Fig. 1 the knife 10 is shown approximately in natural size.
  • the knife 10 has a grip body 11 with a front grip area or knife head 12, which forms a blade holder for an interchangeable blade 13 with a cutting edge 14.
  • the handle body 11 has at the front a planar base surface 15 which extends along the longitudinal central axis x and which is bounded towards its rear region by an oblique stop surface 16 which is perpendicular to it and runs obliquely to the longitudinal central axis x.
  • the base surface 15 becomes narrower towards the blade tip 17, assumes approximately the width of the interchangeable blade 13 at the front and ends with an approximately semicircular contour 18.
  • An elongated centering projection 19 protrudes from the base surface 15, the basic contour of which can be seen from FIG. 4 is adapted to the elongated centering opening 20 of the interchangeable blade 13.
  • the long axis denoted by y of both the elongated centering opening 20 and the elongated centering projection 19 extends parallel to the longitudinal central axis x.
  • the rear end face 21 of the interchangeable blade 13 has the same inclination as the oblique stop surface 16, with the result that the cutting reaction forces introduced into the interchangeable blade 13 are transferred favorably into the handle body 11.
  • the centering projection 19 has a trapezoidal cross section that tapers from its elongated apex surface 22 toward the base surface 15.
  • a holding shoe 23 is pushed with its undercut trapezoidal groove 24, which corresponds to the trapezoidal cross section of the centering projection 19, from front to back onto the trapezoidally undercut centering projection 19 until the oblique rear end 25 of the retaining shoe 23 stops on the oblique stop surface 16.
  • the centering projection 19 has an overlapping pin 30 pointing forward to the blade tip 17, which, when the holding shoe 23 is completely pushed on, engages over a locking tie 31 formed by the holding shoe 23 at the front end of the trapezoidal groove 24 and parallel to the base surface 15.
  • the interaction of overlap pin 30 and locking bar 31 prevents the clamping or receiving gap 32 for the interchangeable blade 13 from opening up.
  • the elongated apex surface 22 of the centering projection 19 rises from the front to the rear (ie in direction b), the depth of the undercut trapezoidal groove 24 also increasing correspondingly from the front to the rear.
  • the elongated apex surface 22 of the centering projection 19 initially runs approximately parallel to the base surface 15 over an axial region, then rises and runs towards its end increasing less or approximately parallel to the base surface 15.
  • the trapezoidal groove 24 has at its rear end a protruding projection 34 protruding from the groove base 33, which with one at the rear end of the elongated
  • the apex surface 22 of the centering projection 19 provided snap-in recess 35 cooperates in a snap-locking manner.
  • this has a spacer bar 36 on each of its two longitudinal sides.
  • the respective transverse extent of the transverse extent of each spacer bar 36 measured parallel to the base surface 15 and transverse to the longitudinal axis x of the handle, corresponds approximately to half the taper of the centering projection 19 (cf. FIG. 6a).
  • the rear region 25 of the holding shoe 13 is at the same time designed as a push handle handle, which permits a secure displacement of the holding shoe 23 both in direction a with the actuating surface 27 and in direction b with the actuating surface 37.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)

Claims (8)

  1. Couteau (10) pour des travaux de découpage fin, comme dans des buts graphiques ou similaires, comprenant un corps de préhension (11) dont l'extrémité de préhension avant présente un réceptacle (12) destiné à la lame pour maintenir une lame interchangeable (13), celle-ci comportant une ouverture de centrage allongée (20), comme un trou allongé ou une ouverture en forme de fente ouverte vers l'arrière, qui s'étend par son grand axe (y) dans la direction longitudinale (x) du corps de préhension, cependant que le réceptacle (12) destiné a la lame forme une partie en saillie de centrage allongée (19) qui traverse l'ouverture allongée de centrage (20), du moins sur une partie de sa longueur totale, et qui fait saillie depuis une surface de base (15), celle-ci l'entourant et étant destinée à la grande surface inférieure (29) de la lame interchangeable (13), et cependant qu'au moins un capuchon de maintien (23) qui sert à fixer la lame interchangeable (13) est associé à la partie en saillie de centrage (19), caractérisé par le fait que la surface de base (15) forme un plan dans son ensemble, par le fait que la partie en saillie de centrage (19) présente une section transversale trapézoïdale qui se rétrécit depuis sa surface frontale allongée (22) vers la surface de base (15), par le fait que l'on peut enfoncer sur la partie en saillie de centrage (19), depuis l'avant (direction b) et dans la direction longitudinale (x) du corps de préhension, un coulisseau de maintien (23) qui forme un capuchon de maintien et qui est pourvu d'une rainure trapézoïdale en contre-dépouille (24) correspondant à la section transversale trapézoïdale de la partie en saillie de centrage (19), et par le fait que le coulisseau de maintien (23) porte sur la grande surface supérieure (28) de la lame interchangeable (13) par son côté inférieur (26) qui est tourné vers la surface de base (15).
  2. Couteau (10) pour des travaux de découpage fin, comme dans des buts graphiques ou similaires, comprenant un corps de préhension (11) dont l'extrémité de préhension avant présente un réceptacle (12) destiné a la lame pour maintenir une lame interchangeable (13), celle-ci comportant une ouverture de centrage allongée (20), comme un trou allongé ou une ouverture en forme de fente ouverte vers l'arrière, qui s'étend par son grand axe (y) dans la direction longitudinale (x) du corps de préhension, cependant que le réceptacle (12) destiné à la lame forme une partie en saillie de centrage allongée (19) qui traverse l'ouverture allongée de centrage (20), du moins sur une partie de sa longueur totale, et qui fait saillie depuis une surface de base (15), celle-ci l'entourant et étant destinée a la grande surface inférieure (29) de la lame interchangeable (13), et cependant qu'au moins un capuchon de maintien (23 ; 30) qui sert à fixer la lame interchangeable (13) est associé a la partie en saillie de centrage (19), et qu'il présente un tenon de maintien (30) qui fait saillie a l'avant depuis la partie en saillie de centrage (19), qui est dirigé vers la pointe (17) de la lame et qui délimite une contre-dépouille (31), caractérisé par le fait que la surface de base (15) forme un plan dans son ensemble, par le fait que la partie en saillie de centrage (19) présente une section transversale trapézoïdale qui se rétrécit depuis sa surface frontale allongée (22) vers la surface de base (15), par le fait que l'on peut enfoncer sur la partie en saillie de centrage, depuis l'avant (direction b) et dans la direction longitudinale (x) du corps de préhension, un coulisseau de maintien (23) qui forme un capuchon de maintien et qui est pourvu d'une rainure trapézoïdale en contre-dépouille (24) correspondant à la section transversale trapézoïdale de la partie en saillie de centrage (19), par le fait que le coulisseau de maintien (23) porte sur la grande surface supérieure (28) de la lame interchangeable (13) par son côté inférieur (26) qui est tourné vers la surface de base (15), et par le fait que, lorsque le coulisseau de maintien (23) est complètement enfoncé, le tenon de maintien (30) recouvre une barrette de verrouillage (31) qui est formée par le coulisseau de maintien (23) à l'extrémité avant de la rainure trapézoïdale (24) et qui est a peu près parallèle à la surface de base (15).
  3. Couteau selon la revendication 1 ou selon la revendication 2, caractérisé par le fait que la surface frontale allongée (22) de la partie en saillie de centrage (19) s'élève de l'avant vers l'arrière (direction b), et que la profondeur de la rainure trapézoïdale en contre-dépouille (24) diminue de l'arrière vers l'avant d'une manière correspondante.
  4. Couteau selon la revendication 3, caractérisé par le fait que la surface frontale allongée (22) de la partie en saillie de centrage (19) s'étend tout d'abord parallèlement à la surface de base (15) sur une zone axiale, qu'elle monte ensuite, et qu'elle s'étend vers son extrémité avec une plus faible pente ou parallèlement a la surface de base (15).
  5. Couteau selon l'une des revendications 1 à 4, caractérisé par le fait que la rainure trapézoïdale (24) et la partie en saillie de centrage (19) constituent dans leurs zones d'extrémité arrière des moyens d'encliquetage (35, 34) qui s'interpénètrent d'une manière amovible.
  6. Couteau selon la revendication 5, caractérisé par le fait que la rainure trapézoïdale (24) présente a son extrémité arrière une partie en saillie d'encliquetage (34) qui fait saillie depuis le fond (33) de la rainure et qui coopère avec un évidement d'encliquetage (35) prévu à l'extrémité arrière de la surface frontale allongée (22) de la partie en saillie de centrage (19).
  7. Couteau selon l'une des revendications 1 à 6, caractérisé par le fait que la partie en saillie de centrage (19) présente sur chacun de ses deux côtés longitudinaux, dans sa zone de transition vers la surface de base (15), une baguette formant entretoise (36) dont l'étendue dans le sens transversal, mesurée parallèlement a la surface de base (15) et transversalement par rapport a l'axe longitudinal (x) du corps de préhension, est à peu près égale à la moitié de la conicité de la partie en saillie de centrage (19).
  8. Couteau selon l'une des revendications 1 à 7, caractérisé par le fait que la région arrière (25) du coulisseau de maintien (23) est réalisée sous la forme d'un bossage de préhension (27, 37).
EP95112072A 1994-10-07 1995-08-01 Couteau pour des travaux de coupe fine comme dans des buts graphiques ou analogues Expired - Lifetime EP0705667B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4435971A DE4435971C1 (de) 1994-10-07 1994-10-07 Messer für Feinschneidarbeiten, wie für graphische Zwecke od. dgl.
DE4435971 1994-10-07

Publications (2)

Publication Number Publication Date
EP0705667A1 EP0705667A1 (fr) 1996-04-10
EP0705667B1 true EP0705667B1 (fr) 1997-01-15

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ID=6530263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95112072A Expired - Lifetime EP0705667B1 (fr) 1994-10-07 1995-08-01 Couteau pour des travaux de coupe fine comme dans des buts graphiques ou analogues

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EP (1) EP0705667B1 (fr)
DE (2) DE4435971C1 (fr)
ES (1) ES2098989T3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8112694U1 (de) * 1981-10-01 Fa. Otto Rüttgers, 5650 Solingen Messer
JPH0416655Y2 (fr) * 1987-04-30 1992-04-14
DE3740036A1 (de) * 1987-11-26 1989-06-15 Beermann Kg Martor Argentax Wechselklingenmesser
JPH0714853Y2 (ja) * 1990-10-17 1995-04-10 フェザー安全剃刀株式会社 トリミングハンドル

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Publication number Publication date
DE4435971C1 (de) 1995-05-24
ES2098989T3 (es) 1997-05-01
DE59500091D1 (de) 1997-02-27
EP0705667A1 (fr) 1996-04-10

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