EP0726124A2 - Knife, particularly carpet knife, with changeable blade - Google Patents

Knife, particularly carpet knife, with changeable blade Download PDF

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Publication number
EP0726124A2
EP0726124A2 EP95118744A EP95118744A EP0726124A2 EP 0726124 A2 EP0726124 A2 EP 0726124A2 EP 95118744 A EP95118744 A EP 95118744A EP 95118744 A EP95118744 A EP 95118744A EP 0726124 A2 EP0726124 A2 EP 0726124A2
Authority
EP
European Patent Office
Prior art keywords
handle body
blade
knife
body housing
body cover
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.)
Granted
Application number
EP95118744A
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German (de)
French (fr)
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EP0726124A3 (en
EP0726124B1 (en
Inventor
Ewald Helmut Beermann
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 Argentax EH Beermann 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 EP0726124A2 publication Critical patent/EP0726124A2/en
Publication of EP0726124A3 publication Critical patent/EP0726124A3/en
Application granted granted Critical
Publication of EP0726124B1 publication Critical patent/EP0726124B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B5/00Hand knives with one or more detachable blades

Definitions

  • the invention relates to a knife, in particular a carpet cutting knife, according to the preamble of claim 1.
  • a known knife of the type described above which is the subject of EP 0 128 711, has two shells of the same design which form the handle body housing in the closed state.
  • the guide slot for the knife blade is formed by both shells of the handle body housing.
  • a nose with an approximately trapezoidal basic shape of the one shell of the handle body housing engages in an approximately angular recess of the other shell of the handle body housing.
  • the pivot axis is formed by a bolt penetrating both handle body housing shells, which at one end is under the action of an annular spring washer arranged between a plurality of disks, which strives to pull the two shells of the handle body housing against one another.
  • the knife blade held during this process can be moved out of its storage only on one side, namely by a nose-shaped projection of the blade receptacle , tilted and then damaged by the pivoting nose on the cutting surface because the pivoting direction of the nose is towards the cutting edge of the knife blade.
  • the invention has for its object to provide a knife of the type mentioned, which ensures safe holding of the knife blade with simple handling both when opening and when closing the handle body cover.
  • the recess of the handle body housing is formed by a guide slot which completely encompasses the cross section of the knife blade and in which the knife-like nose of the handle body cover engages in its closed position.
  • the blade is held securely on at least two surface parts, namely once on the known blade receptacle, consisting of one or more projecting warts, which engage in corresponding recesses on the back of the blade, and once again through the edges of the guide slot, which encompass the knife blade is only and exclusively arranged in the handle body housing and not - as in the prior art - is only formed by the joining of two shells of the handle body housing.
  • the nose slides during the closed position of the handle body cover from the back of the blade into the guide slot and extends over its entire height next to the knife blade.
  • the invention provides that in addition to the blade receptacle, the handle body cover also covers a magazine space arranged next to it in the handle body housing and a blade support level projects out of the hollow magazine space below the blade receptacle in the handle body housing. This flat blade support level improves the holding of the knife blade both in the guide slot and in the blade holder.
  • the side view of the nose has a trapezoidal shape for conforming to the usual, bevelled shape of the handle body housing at the blade outlet.
  • the nose exerts slight clamping forces on the side surface of the knife blade facing it in the closed position of the handle body cover.
  • the cross-sectional shape of the guide slot is rectangular.
  • the pivot axis is formed by a screw which penetrates the handle body cover in a hole in a corner area and which is screwed into a blind hole with a corresponding internal thread in the vicinity of the back area of the handle body housing.
  • the handle body cover has at its end region, namely on its inner surface facing the blade receptacle, in the vicinity of the projecting nose, a latching recess which interacts with a projecting, resilient latching element in the handle body housing in the vicinity of the blade receptacle. Since this resilient latching element with the latching recess is relatively far away from the pivot axis of the handle body cover, a secure latching of the handle body cover can be achieved even with low spring forces.
  • the locking recess advantageously consists of a spherical cap and the locking element consists either of an entropy-elastic plastic stopper or of a locking ball under the action of a spring.
  • the circumferential contour of the grip body cover nestles flush with the contour of the grip body housing.
  • the handle body housing is in the side view on its back area facing the knife back with a circular arc shape and on its underside, starting at the center of the magazine space, with two wavy indentations as well as an intermediate wave-shaped elevation that continuously merge.
  • the width of the front indentation corresponds approximately to the thickness of the index finger and the rear indentation corresponds at least to the thickness of a little finger on a work hand, in particular a male person.
  • This advantageous ergonomic contour is basically known from a knife of a different type according to DE-GM 94 09 872.
  • the knife 10 has a handle body housing 11 and a handle body cover 12 which is penetrated in a corner region 13 with a bore 14 by a screw 15 as a pivot axis, which at the point 16 near the back region 11a of the Handle body housing 11 is screwed.
  • the handle body cover 12 is provided with a knife-like nose 17 at its free end region which is furthest away from the pivot axis 15.
  • the handle body housing 11 has, as the blade receptacle 18, two wart-like projections which engage in corresponding recesses 19 in the back of the blade 26 of the knife blade 20, which is shown partly in broken lines.
  • the handle body housing 11 is provided with a hollow magazine space 21, from which a blade support plane 22 projects below the blade receptacle 18.
  • the grip body housing 11 is provided with a guide slot 23 which completely encompasses the cross section of the knife blade 20, as can be seen most clearly from FIG. 4.
  • the nose 17 has a trapezoidal shape in its side view, the side edges of which are designated 17a, 17b, 17c, 17d and their outer corner points 24 and 25.
  • the nose 17 is pushed into the guide slot 23 from the back of the blade 26 during the closing process of the handle body cover 12 and extends with its trapezoidal edges 17c and 17d over its entire height next to the knife blade 20.
  • the trapezoidal edge 17b of the nose 17 lies flush with the front edge 27 of the handle body housing 11, and the trapezoidal edge 17a lies flush with the lower edge 28 of the guide slot 23. Only the trapezoidal side 17c is not at one Surface of the guide slot 23 flush since the corner point 24 assumes a position (see also FIG. 4) in the central region of the guide slot 23. In this closed position, it can be advantageous if the nose 17 exerts slight clamping forces on the side surface 29 of the knife blade 20 facing it.
  • a latching recess 30 indicated by dashed lines is advantageously arranged, which interacts with a projecting, resilient latching element 31 in the handle body housing 11 in the vicinity of the blade receptacle 18.
  • the locking recess 30 advantageously consists of a spherical cap, whereas the locking element 31 consists either of an entropy-elastic plug or of a locking ball under the action of a spring, not shown.
  • the grip body cover 12 With its circumferential contour 32, nestles flush with the contour 33 of the grip body housing 11.
  • the handle body housing 11 has a circular arc shape on its back region 11a facing the blade back 26 and its underside 11b, beginning at the height of the center of the magazine space 21, is provided with two undulating indentations 34, 35 and an undulating elevation 36 located between them, which continuously merge into one another.
  • the width of the front indentation 34 corresponds approximately to the thickness of the index finger and the rear indentation 35 approximately corresponds to the thickness of a little finger on a work hand, in particular a male person, thereby achieving an ergonomically particularly favorable handle shape.
  • the handle body cover 12 is pivoted clockwise, for example by a right-handed person with the thumb of the right hand, counter to the locking action of the resilient locking element 31 in the direction of arrow 37 according to FIG. 1, until the knife blade 20 and the magazine space 21 are exposed.
  • the knife blade 20 is then gripped from the magazine space 21, lifted out of the wart-like projections of the blade receptacle 18 and then pulled out of the guide slot 23 in the direction of the arrow 38.
  • a new knife blade 20 is removed from the magazine space 21, inserted slightly tilted into the guide slot 23 in the opposite direction of the arrow 38, and then in the direction of the blade receptacle 18 within the guide slot 23 against the blade support plane 22 and then the handle body cover 12 against the direction of the arrow 37 pivoted until the knife-like nose 17 engages in the guide slot 23 in the manner already described and the latching element 31 interacts with the latching recess 30.

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

Abstract

The knife (10) has a grip body casing (11) and a blade receiver for the exchangeable blade (20). A grip body cap (12) can be closed over the blade receiver by turning it on an axis (15), but leaving a guide slit (23) for the blade. The cap has a projection (17) on the end facing the blade, fitting in a recess in the grip body casing. The recess in the grip body casing is formed by the guide slit, which completely encases the cross section of the knife blade. The knife-like projection of the grip body cover fits in this in the closed position. The projection can be pushed into the guide slit. It may extend over the entire height against the knife blade.

Description

Die Erfindung betrifft ein Messer, insbesondere ein Teppichboden-Schneidmesser, entsprechend dem Oberbegriff des Anspruchs 1.The invention relates to a knife, in particular a carpet cutting knife, according to the preamble of claim 1.

Ein bekanntes Messer dieser vorbeschriebenen Art, das Gegenstand der EP 0 128 711 ist, weist zwei gleichgestaltete Schalen auf, die im geschlossenen Zustand das Griffkörpergehäuse bilden. In diesem Schließzustand wird von beiden Schalen des Griffkörpergehäuses der Führungsschlitz für die Messerklinge gebildet. In dieser geschlossenen Position, dem Schließzustand, greift eine Nase mit etwa trapezförmiger Grundform der einen Schale des Griffkörpergehäuses in einen etwa winkelförmig gestalteten Rücksprung der anderen Schale des Griffkörpergehäuses ein. Die Schwenkachse wird von einem beide Griffkörpergehäuse-Schalen durchdringenden Bolzen gebildet, der an einem Ende unter der Wirkung einer zwischen mehreren Scheiben angeordneten Ringfederscheibe steht, welche bestrebt ist, die beiden Schalen des Griffkörpergehäuses gegeneinanderzuziehen. Beim Schließen der beiden Schalen des Griffkörpergehäuses, welches unter Wirkung der Ringfederscheibe in Verbindung mit der vorspringenden Nase und dem Rücksprung nach dem Prinzip eines Schnappverschlusses erfolgt, kann die während dieses Vorganges nur einseitig, nämlich durch einen nasenförmigen Vorsprung der Klingenaufnahme gehalterte Messerklinge aus ihrer Lagerung bewegt, verkantet und sodann von der einschwenkenden Nase an der Schneidfläche beschädigt werden, weil die Einschwenkrichtung der Nase in Richtung auf die Schneide der Messerklinge erfolgt.A known knife of the type described above, which is the subject of EP 0 128 711, has two shells of the same design which form the handle body housing in the closed state. In this closed state, the guide slot for the knife blade is formed by both shells of the handle body housing. In this closed position, the closed state, a nose with an approximately trapezoidal basic shape of the one shell of the handle body housing engages in an approximately angular recess of the other shell of the handle body housing. The pivot axis is formed by a bolt penetrating both handle body housing shells, which at one end is under the action of an annular spring washer arranged between a plurality of disks, which strives to pull the two shells of the handle body housing against one another. When closing the two shells of the handle body housing, which takes place under the action of the ring spring washer in connection with the projecting nose and the recess on the principle of a snap lock, the knife blade held during this process can be moved out of its storage only on one side, namely by a nose-shaped projection of the blade receptacle , tilted and then damaged by the pivoting nose on the cutting surface because the pivoting direction of the nose is towards the cutting edge of the knife blade.

Von diesem nächstliegenden Stand der Technik ausgehend, liegt der Erfindung die Aufgabe zugrunde, ein Messer der eingangs genannten Gattung zu schaffen, welches bei einfacher Handhabung sowohl beim Öffnen als auch beim Schließen des Griffkörperdeckels eine sichere Halterung der Messerklinge gewährleistet.Starting from this closest prior art, the invention has for its object to provide a knife of the type mentioned, which ensures safe holding of the knife blade with simple handling both when opening and when closing the handle body cover.

Diese Aufgabe wird in Verbindung mit dem eingangs genannten Gattungsbegriff erfindungsgemäß dadurch gelöst, daß der Rücksprung des Griffkörpergehäuses von einem den Querschnitt der Messerklinge vollständig umfangsschlüssig umgreifenden Führungsschlitz gebildet ist, in welchen die messerartig ausgebildete Nase des Griffkörperdeckels in dessen Schließposition eingreift. Nunmehr wird die Klinge an mindestens zwei Flächenteilen sicher gehalten, nämlich einmal an der an sich bekannten Klingenaufnahme, bestehend aus einer oder mehreren vorspringenden Warzen, die in entsprechende Rücksprünge am Klingenrücken eingreifen und ein weiteres Mal durch die die Messerklinge umfangsschlüssig umgreifenden Ränder des Führungsschlitzes, der nur und ausschließlich im Griffkörpergehäuse angeordnet ist und nicht - wie beim Stand der Technik - erst durch die Zusammenfügung von zwei Schalen des Griffkörpergehäuses gebildet wird.This object is achieved in connection with the generic term mentioned at the outset in that the recess of the handle body housing is formed by a guide slot which completely encompasses the cross section of the knife blade and in which the knife-like nose of the handle body cover engages in its closed position. Now the blade is held securely on at least two surface parts, namely once on the known blade receptacle, consisting of one or more projecting warts, which engage in corresponding recesses on the back of the blade, and once again through the edges of the guide slot, which encompass the knife blade is only and exclusively arranged in the handle body housing and not - as in the prior art - is only formed by the joining of two shells of the handle body housing.

Nach einer vorteilhaften Weiterbildung der Erfindung schiebt sich die Nase während der Schließposition des Griffkörperdeckels vom Klingenrücken her in den Führungsschlitz ein und erstreckt sich über dessen gesamte Höhe neben der Messerklinge. Dadurch werden selbst bei verkanteter Lage der Messerklinge innerhalb des Führungsschlitzes Beschädigungen der Schneidkante sicher vermieden, weil sich die Nase während der Schließposition des Griffkörperdeckels vom Klingenrücken her in den Führungsschlitz einschiebt und somit die Messerklinge schonend in ihre bestimmungsgemäße Position zurückdrückt.According to an advantageous development of the invention, the nose slides during the closed position of the handle body cover from the back of the blade into the guide slot and extends over its entire height next to the knife blade. As a result, damage to the cutting edge is reliably avoided even when the knife blade is tilted within the guide slot because the nose inserts into the guide slot from the back of the blade during the closed position of the handle body cover and thus gently presses the knife blade back into its intended position.

Außerdem sieht die Erfindung vor, daß der Griffkörperdeckel außer der Klingenaufnahme noch einen neben ihr im Griffkörpergehäuse angeordneten Magazinraum abdeckt und unterhalb der Klingenaufnahme im Griffkörpergehäuse eine Klingenauflagenebene aus dem hohl ausgebildeten Magazinraum vorspringt. Diese flächige Klingenauflagenebene verbessert die Halterung der Messerklinge sowohl im Führungsschlitz als auch in der Klingenaufnahme.In addition, the invention provides that in addition to the blade receptacle, the handle body cover also covers a magazine space arranged next to it in the handle body housing and a blade support level projects out of the hollow magazine space below the blade receptacle in the handle body housing. This flat blade support level improves the holding of the knife blade both in the guide slot and in the blade holder.

Zur konturengerechten Anpassung an die übliche, abgeschrägte Form des Griffkörpergehäuses am Klingenaustritt weist die Nase in ihrer Seitenansicht eine Trapezform auf.The side view of the nose has a trapezoidal shape for conforming to the usual, bevelled shape of the handle body housing at the blade outlet.

Um bei großen Scherkräften die Messerklinge sicher und verkantungsfrei im Führungsschlitz zu halten, übt nach einer vorteilhaften Weiterbildung der Erfindung die Nase in der Schließposition des Griffkörperdeckels leichte Klemmkräfte auf die ihr zugekehrte Seitenfläche der Messerklinge aus. Dabei ist die Querschnittsform des Führungsschlitzes rechteckig ausgebildet.In order to hold the knife blade securely and without tilting in the guide slot in the case of large shear forces, according to an advantageous development of the invention, the nose exerts slight clamping forces on the side surface of the knife blade facing it in the closed position of the handle body cover. Here the cross-sectional shape of the guide slot is rectangular.

Die Schwenkachse ist von einer den Griffkörperdeckel in einer Bohrung in einem Eckenbereich durchgreifenden Schraube gebildet, welche in eine Sackbohrung mit entsprechendem Innengewinde in der Nähe des Rückenbereiches des Griffkörpergehäuses eingeschraubt ist. Der Griffkörperdeckel besitzt an seinem Endbereich, und zwar an seiner der Klingenaufnahme zugewandten Innenfläche, in der Nähe der vorspringenden Nase eine Rastausnehmung, die mit einem vorspringenden, federnden Rastelement im Griffkörpergehäuse in der Nähe der Klingenaufnahme zusammenwirkt. Da dieses federnde Rastelement mit der Rastausnehmung relativ weit von der Schwenkachse des Griffkörperdeckels entfernt ist, kann bereits mit geringen Federkräften eine sichere Verrastung des Griffkörperdeckels erzielt werden.The pivot axis is formed by a screw which penetrates the handle body cover in a hole in a corner area and which is screwed into a blind hole with a corresponding internal thread in the vicinity of the back area of the handle body housing. The handle body cover has at its end region, namely on its inner surface facing the blade receptacle, in the vicinity of the projecting nose, a latching recess which interacts with a projecting, resilient latching element in the handle body housing in the vicinity of the blade receptacle. Since this resilient latching element with the latching recess is relatively far away from the pivot axis of the handle body cover, a secure latching of the handle body cover can be achieved even with low spring forces.

Die Rastausnehmung besteht vorteilhaft aus einer Kalotte und das Rastelement besteht entweder aus einem entropieelastischen Kunststoff-Stopfen oder aus einer unter Wirkung einer Feder stehenden Rastkugel.The locking recess advantageously consists of a spherical cap and the locking element consists either of an entropy-elastic plastic stopper or of a locking ball under the action of a spring.

Zur Beibehaltung einer ergonomisch günstigen Form schmiegt sich der Griffkörperdeckel mit seiner Umfangskontur bündig an die Kontur des Griffkörpergehäuses an. Das Griffkörpergehäuse ist in der Seitenansicht an seinem dem Messerrücken zugekehrten Rückenbereich mit einer kreisförmigen Bogenform und an seiner Unterseite, in Höhe der Mitte des Magazinraumes beginnend, mit zwei wellenförmigen Einbuchtungen sowie einer dazwischen befindlichen wellenförmigen Erhöhung versehen, die kontinuierlich ineinander übergehen. Die Breite der vorderen Einbuchtung entspricht etwa der Dicke des Zeigefingers und die hintere Einbuchtung mindestens der Dicke eines kleinen Fingers einer Arbeitshand, insbesondere einer männlichen Person. Diese vorteilhafte ergonomische Kontur ist grundsätzlich von einem Messer anderer Gattung gemäß dem DE-GM 94 09 872 bekannt.In order to maintain an ergonomically favorable shape, the circumferential contour of the grip body cover nestles flush with the contour of the grip body housing. The handle body housing is in the side view on its back area facing the knife back with a circular arc shape and on its underside, starting at the center of the magazine space, with two wavy indentations as well as an intermediate wave-shaped elevation that continuously merge. The width of the front indentation corresponds approximately to the thickness of the index finger and the rear indentation corresponds at least to the thickness of a little finger on a work hand, in particular a male person. This advantageous ergonomic contour is basically known from a knife of a different type according to DE-GM 94 09 872.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt. Dabei zeigen:

  • Fig. 1 die Seitenansicht des erfindungsgemäßen Messers bei zurückgeschwenktem Griffkörperdeckel,
  • Fig. 2 die Ansicht von Fig. 1 bei nahezu vollständig eingeschwenktem Griffkörperdeckel und mit bereits in den Führungsschlitz eingreifender Nase,
  • Fig. 3 die Ansicht von Fig. 2 bei vollständig in die Schließposition eingeschwenktem Griffkörperdeckel und
  • Fig. 4 die Ansicht in Richtung des Pfeiles IV von Fig. 3.
An embodiment of the invention is shown in the drawings. Show:
  • 1 is a side view of the knife according to the invention with the handle body cover pivoted back,
  • 2 shows the view of FIG. 1 with the handle body cover almost completely swung in and with the nose already engaging in the guide slot,
  • Fig. 3 is the view of Fig. 2 with the handle body cover fully pivoted into the closed position and
  • 4 is the view in the direction of arrow IV of FIG. 3rd

Gemäß den Figuren 1 bis 3 weist das Messer 10 ein Griffkörpergehäuse 11 und einen Griffkörperdeckel 12 auf, der in einem Eckenbereich 13 mit einer Bohrung 14 von einer Schraube 15 als Schwenkachse durchgriffen ist, die an der Stelle 16 nahe des Rückenbereiches 11a des Griffkörpergehäuses 11 eingeschraubt ist. An seinem von der Schwenkachse 15 am weitesten entfernt gelegenen freien Endbereich ist der Griffkörperdeckel 12 mit einer messerartig ausgebildeten Nase 17 versehen.According to FIGS. 1 to 3, the knife 10 has a handle body housing 11 and a handle body cover 12 which is penetrated in a corner region 13 with a bore 14 by a screw 15 as a pivot axis, which at the point 16 near the back region 11a of the Handle body housing 11 is screwed. The handle body cover 12 is provided with a knife-like nose 17 at its free end region which is furthest away from the pivot axis 15.

Das Griffkörpergehäuse 11 weist als Klingenaufnahme 18 zwei warzenartige Vorsprünge auf, die in entsprechende Rücksprünge 19 im Klingenrücken 26 der teilweise gestrichtelt dargestellten Messerklinge 20 eingreifen. Außerdem ist das Griffkörpergehäuse 11 mit einem hohl ausgebildeten Magazinraum 21 versehen, aus welchem unterhalb der Klingenaufnahme 18 eine Klingenauflagenebene 22 vorspringt.The handle body housing 11 has, as the blade receptacle 18, two wart-like projections which engage in corresponding recesses 19 in the back of the blade 26 of the knife blade 20, which is shown partly in broken lines. In addition, the handle body housing 11 is provided with a hollow magazine space 21, from which a blade support plane 22 projects below the blade receptacle 18.

Am Austritt der Messerklinge 20 ist das Griffkörpergehäuse 11 mit einem den Querschnitt der Messerklinge 20 vollständig umfangsschlüssig umgreifenden Führungsschlitz 23 versehen, wie am anschaulichsten aus Fig. 4 hervorgeht.At the outlet of the knife blade 20, the grip body housing 11 is provided with a guide slot 23 which completely encompasses the cross section of the knife blade 20, as can be seen most clearly from FIG. 4.

Wie aus Fig. 1 entnommen werden kann, weist die Nase 17 in ihrer Seitenansicht ein Trapezform auf, deren Seitenkanten mit 17a, 17b, 17c, 17d und ihre äußeren Eckpunkte mit 24 und 25 bezeichnet sind.As can be seen from FIG. 1, the nose 17 has a trapezoidal shape in its side view, the side edges of which are designated 17a, 17b, 17c, 17d and their outer corner points 24 and 25.

Gemäß Fig. 2 schiebt sich die Nase 17 während des Schließvorganges des Griffkörperdeckels 12 vom Klingenrücken 26 her in den Führungsschlitz 23 ein und erstreckt sich mit ihren Trapezkanten 17c und 17d über dessen gesamte Höhe neben der Messerklinge 20.According to FIG. 2, the nose 17 is pushed into the guide slot 23 from the back of the blade 26 during the closing process of the handle body cover 12 and extends with its trapezoidal edges 17c and 17d over its entire height next to the knife blade 20.

In der Schließposition des Griffkörperdeckels 12 gemäß Fig. 3 liegt die Trapezkante 17b der Nase 17 bündig in der Flucht der Vorderkante 27 des Griffkörpergehäuses 11,und die Trapezkante 17a liegt bündig auf der Unterkante 28 des Führungsschlitzes 23. Lediglich die Trapezseite 17c liegt nicht an einer Fläche des Führungsschlitzes 23 bündig an, da der Eckpunkt 24 eine Position (s. auch Fig. 4) im mittleren Bereich des Führungsschlitzes 23 einnimmt. In dieser Schließposition kann es von Vorteil sein, wenn die Nase 17 leichte Klemmkräfte auf die ihr zugekehrte Seitenfläche 29 der Messerklinge 20 ausübt.In the closed position of the handle body cover 12 according to FIG. 3, the trapezoidal edge 17b of the nose 17 lies flush with the front edge 27 of the handle body housing 11, and the trapezoidal edge 17a lies flush with the lower edge 28 of the guide slot 23. Only the trapezoidal side 17c is not at one Surface of the guide slot 23 flush since the corner point 24 assumes a position (see also FIG. 4) in the central region of the guide slot 23. In this closed position, it can be advantageous if the nose 17 exerts slight clamping forces on the side surface 29 of the knife blade 20 facing it.

Vorteilhaft ist in dem Endbereich des Griffkörperdeckels 12 in der Nähe der vorspringenden Nase 17 eine gestrichelt angedeutete Rastausnehmung 30 angeordnet, die mit einem vorspringenden, federnden Rastelement 31 im Griffkörpergehäuse 11 in der Nähe der Klingenaufnahme 18 zusammenwirkt. Die Rastausnehmung 30 besteht vorteilhaft aus einer Kalotte, wohingegen das Rastelement 31 entweder aus einem entropieelastischen Stopfen oder aus einer unter Wirkung einer nicht dargestellten Feder stehenden Rastkugel besteht.In the end region of the handle body cover 12 in the vicinity of the projecting nose 17, a latching recess 30 indicated by dashed lines is advantageously arranged, which interacts with a projecting, resilient latching element 31 in the handle body housing 11 in the vicinity of the blade receptacle 18. The locking recess 30 advantageously consists of a spherical cap, whereas the locking element 31 consists either of an entropy-elastic plug or of a locking ball under the action of a spring, not shown.

Wie am deutlichsten aus den Figuren 2 und 3 entnommen werden kann, schmiegt sich der Griffkörperdeckel 12 mit seiner Umfangskontur 32 bündig an die Kontur 33 des Griffkörpergehäuses 11 an.As can be seen most clearly from FIGS. 2 and 3, the grip body cover 12, with its circumferential contour 32, nestles flush with the contour 33 of the grip body housing 11.

Das Griffkörpergehäuse 11 ist gemäß Fig. 3 an seinem dem Klingenrücken 26 zugekehrten Rückenbereich 11a mit einer kreisförmigen Bogenform und an seiner Unterseite 11b, in der Höhe der Mitte des Magazinraumes 21 beginnend, mit zwei wellenförmigen Einbuchtungen 34, 35 sowie einer dazwischen befindlichen, wellenförmigen Erhöhung 36 versehen, die kontinuierlich ineinander übergehen. Dabei entspricht die Breite der vorderen Einbuchtung 34 etwa der Dicke des Zeigefingers und die hintere Einbuchtung 35 etwa der Dicke eines kleines Fingers einer Arbeitshand, insbesondere einer männlichen Person, wodurch eine ergonomisch besonders günstige Grifform erzielt wird.According to FIG. 3, the handle body housing 11 has a circular arc shape on its back region 11a facing the blade back 26 and its underside 11b, beginning at the height of the center of the magazine space 21, is provided with two undulating indentations 34, 35 and an undulating elevation 36 located between them, which continuously merge into one another. The width of the front indentation 34 corresponds approximately to the thickness of the index finger and the rear indentation 35 approximately corresponds to the thickness of a little finger on a work hand, in particular a male person, thereby achieving an ergonomically particularly favorable handle shape.

Zu einem Klingenwechsel wird der Griffkörperdeckel 12 beispielsweise von einem Rechtshänder mit dem Daumen der rechten Hand entgegen der Rastwirkung des federnden Rastelementes 31 in Richtung des Pfeiles 37 gemäß Fig. 1 im Uhrzeigersinn verschwenkt, bis die Messerklinge 20 und der Magazinraum 21 freiliegen. Sodann wird die Messerklinge 20 vom Magazinraum 21 her untergriffen, aus den warzenförmigen Vorsprüngen der Klingenaufnahme 18 abgehoben und sodann in Richtung des Pfeiles 38 aus dem Führungsschlitz 23 herausgezogen. Hiernach wird aus dem Magazinraum 21 eine neue Messerklinge 20 entnommen, leicht verkantet in den Führungsschlitz 23 entgegen der Pfeilrichtung 38 eingeschoben und sodann in Richtung auf die Klingenaufnahme 18 innerhalb des Führungsschlitzes 23 an die Klingenauflagenebene 22 angelegt und hiernach der Griffkörperdeckel 12 entgegen der Richtung des Pfeiles 37 umgeschwenkt, bis die messerartig ausgebildete Nase 17 in der bereits beschriebenen Weise in den Führungsschlitz 23 eingreift und das Rastelement 31 mit der Rastausnehmung 30 zusammenwirkt.To change the blade, the handle body cover 12 is pivoted clockwise, for example by a right-handed person with the thumb of the right hand, counter to the locking action of the resilient locking element 31 in the direction of arrow 37 according to FIG. 1, until the knife blade 20 and the magazine space 21 are exposed. The knife blade 20 is then gripped from the magazine space 21, lifted out of the wart-like projections of the blade receptacle 18 and then pulled out of the guide slot 23 in the direction of the arrow 38. Thereafter, a new knife blade 20 is removed from the magazine space 21, inserted slightly tilted into the guide slot 23 in the opposite direction of the arrow 38, and then in the direction of the blade receptacle 18 within the guide slot 23 against the blade support plane 22 and then the handle body cover 12 against the direction of the arrow 37 pivoted until the knife-like nose 17 engages in the guide slot 23 in the manner already described and the latching element 31 interacts with the latching recess 30.

Claims (13)

Messer, insbesondere Teppichboden-Schneidmesser, mit einem Griffkörpergehäuse und einer eine Messerklinge auswechselbar darin halternden Klingenaufnahme, die von einem um eine senkrecht zur Klingenebene verlaufende Schwenkachse verschwenkbaren Griffkörperdeckel unter Freilassung eines Führungsschlitzes für die Messerklinge verschließbar übergriffen ist, wobei der Griffkörperdeckel an seinem der Messerklinge zugewandten Endbereich mit einer vorspringenden Nase versehen ist, die formschlüssig in einen Rücksprung des Griffkörpergehäuses eingreift, dadurch gekennzeichnet, daß der Rücksprung des Griffkörpergehäuses (11) von einem den Querschnitt der Messerklinge (20) vollständig umfangsschlüssig umgreifenden Führungsschlitz (23) gebildet ist, in welchen die messerartig ausgebildete Nase (17) des Griffkörperdeckels (12) in dessen Schließposition eingreift.Knives, in particular carpeting cutting knives, with a handle body housing and a blade receptacle interchangeably holding therein, which is overlapped by a handle body cover which can be pivoted about a pivot axis running perpendicular to the blade plane, leaving a guide slot for the knife blade, the handle body cover on its side facing the knife blade End region is provided with a projecting nose which engages in a form-fitting manner in a recess of the handle body housing, characterized in that the recess of the handle body housing (11) is formed by a guide slot (23) which completely encompasses the cross section of the knife blade (20) and in which the Knife-like nose (17) of the handle body cover (12) engages in its closed position. Messer nach Anspruch 1, dadurch gekennzeichnet, daß sich die Nase (17) während der Schließposition des Griffkörperdeckels (12) vom Klingenrücken (26) her in den Führungsschlitz (23) einschiebt und sich über dessen gesamte Höhe neben der Messerklinge (20) erstreckt.Knife according to claim 1, characterized in that the nose (17) pushes into the guide slot (23) from the back of the blade (26) during the closed position of the handle body cover (12) and extends over its entire height next to the knife blade (20). Messer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Nase (17) in ihrer Seitenansicht eine Trapezform aufweist.Knife according to claim 1 or 2, characterized in that the nose (17) has a trapezoidal shape in its side view. Messer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Nase (17) in der Schließposition des Griffkörperdeckels (12) leichte Klemmkräfte auf die ihr zugekehrte Seitenfläche (29) der Messerklinge (20) ausübt.Knife according to one of claims 1 to 3, characterized in that the nose (17) in the closed position of the handle body cover (12) exerts slight clamping forces on the side surface (29) of the knife blade (20) facing it. Messer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Querschnittsform des Führungsschlitzes (23) rechteckig ausgebildet ist.Knife according to one of claims 1 to 4, characterized in that the cross-sectional shape of the guide slot (23) is rectangular. Messer nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Schwenkachse (15) von einer den Griffkörperdeckel (12) in einer Bohrung (14) in einem Eckenbereich (13) durchgreifenden Schraube gebildet ist, welche in eine Sackbohrung mit entsprechendem Innengewinde in der Nähe des Rückenbereiches (11a) des Griffkörpergehäuses (11) eingeschraubt ist.Knife according to one of claims 1 to 5, characterized in that the pivot axis (15) is formed by a screw penetrating the handle body cover (12) in a bore (14) in a corner region (13), which screw into a blind bore with a corresponding internal thread in near the back area (11a) of the handle body housing (11) is screwed in. Messer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß in dem Endbereich des Griffkörperdeckels (12) in der Nähe der vorspringenden Nase (17) eine Rastausnehmung (30) vorgesehen ist, die mit einem vorspringenden, federnden Rastelement (31) im Griffkörpergehäuse (11) in der Nähe der Klingenaufnahme (18) zusammenwirkt.Knife according to one of claims 1 to 6, characterized in that in the end region of the handle body cover (12) in the vicinity of the projecting nose (17) there is a latching recess (30) which has a projecting, resilient latching element (31) in the handle body housing (11) cooperates near the blade holder (18). Messer nach Anspruch 7, dadurch gekennzeichnet, daß die Rastausnehmung (30) aus einer Kalotte und das Rastelement (31) entweder aus einem entropieelastischen Stopfen oder aus einer unter Wirkung einer Feder stehenden Rastkugel besteht.Knife according to claim 7, characterized in that the latching recess (30) consists of a spherical cap and the latching element (31) consists either of an entropy-elastic plug or of a latching ball under the action of a spring. Messer nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Griffkörperdeckel (12) außer der Klingenaufnahme (18) noch einen neben ihr im Griffkörpergehäuse (11) angeordneten Magazinraum (21) abdeckt.Knife according to one of claims 1 to 8, characterized in that the handle body cover (12), in addition to the blade holder (18), also covers a magazine space (21) arranged next to it in the handle body housing (11). Messer nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß unterhalb der Klingenaufnahme (18) im Griffkörpergehäuse (11) eine Klingenauflagenebene (22) aus dem hohl ausgebildeten Magazinraum (21) vorspringt.Knife according to one of claims 1 to 9, characterized in that below the blade receptacle (18) in the handle body housing (11) a blade support plane (22) projects out of the hollow magazine space (21). Messer nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß sich der Griffkörperdeckel (12) mit seiner Umfangskontur (32) bündig an die Kontur (33) des Griffkörpergehäuses (11) anschmiegt.Knife according to one of claims 1 to 10, characterized in that the grip body cover (12) with its peripheral contour (32) fits snugly against the contour (33) of the grip body housing (11). Messer nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß das Griffkörpergehäuse (11) in der Seitenansicht an seinem dem Klingenrücken (26) zugekehrten Rückenbereich (11a) mit einer kreisförmigen Bogenform und an seiner Unterseite (11b), in Höhe der Mitte des Magazinraumes (21) beginnend, mit zwei wellenförmigen Einbuchtungen (34, 35) sowie einer dazwischen befindlichen wellenförmigen Erhöhung (36) versehen ist, die kontinuierlich ineinander übergehen.Knife according to one of claims 1 to 11, characterized in that the handle body housing (11) in side view on its back area (11a) facing the blade back (26) with a circular arc shape and on its underside (11b), at the level of the center of the Magazine room (21) starting, is provided with two wavy indentations (34, 35) and an intermediate wavy elevation (36) which merge continuously. Messer nach Anspruch 12, dadurch gekennzeichnet, daß die Breite der vorderen Einbuchtung (34) etwa der Dicke des Zeigefingers und die hintere Einbuchtung (35) mindestens der Dicke eines kleinen Fingers einer Arbeitshand, insbesondere einer männlichen Person, entspricht.Knife according to claim 12, characterized in that the width of the front indentation (34) is approximately the thickness of the index finger and the rear indentation (35) is at least the thickness of one little finger of a working hand, especially a male person.
EP95118744A 1995-02-08 1995-11-29 Knife, particularly carpet knife, with changeable blade Expired - Lifetime EP0726124B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19504005A DE19504005C1 (en) 1995-02-08 1995-02-08 Carpet cutting knife with exchangeable blade
DE19504005 1995-02-08

Publications (3)

Publication Number Publication Date
EP0726124A2 true EP0726124A2 (en) 1996-08-14
EP0726124A3 EP0726124A3 (en) 1998-03-11
EP0726124B1 EP0726124B1 (en) 2000-05-24

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EP95118744A Expired - Lifetime EP0726124B1 (en) 1995-02-08 1995-11-29 Knife, particularly carpet knife, with changeable blade

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EP (1) EP0726124B1 (en)
DE (2) DE19504005C1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1413679A (en) * 1972-10-17 1975-11-12 Jra Steel Processing Ltd Cutting blade holders
DE2546966A1 (en) * 1974-10-21 1976-04-29 Allway Tools CUTTING TOOL
EP0128711A2 (en) * 1983-06-13 1984-12-19 The Stanley Works Utility knife
US5031322A (en) * 1989-04-13 1991-07-16 Great Neck Saw Manufacturers, Inc. Utility knife
EP0451544A2 (en) * 1990-03-28 1991-10-16 Firma Maximilian Janser Knife blade holder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9409872U1 (en) * 1994-06-17 1994-08-11 Schlipkoeter Michael Dr Knives, in particular carpet cutting knives, with replaceable knife blades

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1413679A (en) * 1972-10-17 1975-11-12 Jra Steel Processing Ltd Cutting blade holders
DE2546966A1 (en) * 1974-10-21 1976-04-29 Allway Tools CUTTING TOOL
EP0128711A2 (en) * 1983-06-13 1984-12-19 The Stanley Works Utility knife
US5031322A (en) * 1989-04-13 1991-07-16 Great Neck Saw Manufacturers, Inc. Utility knife
EP0451544A2 (en) * 1990-03-28 1991-10-16 Firma Maximilian Janser Knife blade holder

Also Published As

Publication number Publication date
EP0726124A3 (en) 1998-03-11
DE19504005C1 (en) 1996-03-07
DE59508392D1 (en) 2000-06-29
EP0726124B1 (en) 2000-05-24

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