EP3698928B1 - Knife with blade device - Google Patents

Knife with blade device Download PDF

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Publication number
EP3698928B1
EP3698928B1 EP20158515.5A EP20158515A EP3698928B1 EP 3698928 B1 EP3698928 B1 EP 3698928B1 EP 20158515 A EP20158515 A EP 20158515A EP 3698928 B1 EP3698928 B1 EP 3698928B1
Authority
EP
European Patent Office
Prior art keywords
blade
knife according
bolt
form fitting
projection
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.)
Active
Application number
EP20158515.5A
Other languages
German (de)
French (fr)
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EP3698928A1 (en
Inventor
Martin Rohrbach
Kerry Henn
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 KG
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Publication date
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Publication of EP3698928A1 publication Critical patent/EP3698928A1/en
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Publication of EP3698928B1 publication Critical patent/EP3698928B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B1/00Hand knives with adjustable blade; Pocket knives
    • B26B1/02Hand knives with adjustable blade; Pocket knives with pivoted blade
    • B26B1/04Hand knives with adjustable blade; Pocket knives with pivoted blade lockable in adjusted position
    • B26B1/046Hand knives with adjustable blade; Pocket knives with pivoted blade lockable in adjusted position with a locking member acting in axial direction parallel to the pivot axis of the blade
    • 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
    • B26B5/001Hand knives with one or more detachable blades with blades being slid out of handle immediately prior to use
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B1/00Hand knives with adjustable blade; Pocket knives
    • B26B1/08Hand knives with adjustable blade; Pocket knives with sliding blade
    • 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
    • B26B5/001Hand knives with one or more detachable blades with blades being slid out of handle immediately prior to use
    • B26B5/003Hand knives with one or more detachable blades with blades being slid out of handle immediately prior to use comprising retraction means for the blade or the blade holder

Definitions

  • the invention relates to a knife with a blade device.
  • the blade device includes a blade carrier and a blade.
  • Such a blade device is usually part of knives, especially cutter knives.
  • Such a knife is from the WO 99/00224 known.
  • the WO 99/00224 relates to a knife with a housing which has two housing parts which are pivotally connected to one another at a rear end by means of a hinge.
  • the knife further comprises a blade carrier 44 for receiving a blade 14.
  • the blade carrier 44 can be locked in different positions relative to the housing (see page 10, paragraph 2).
  • the blade carrier 44 is held on the housing by means of a rivet connection 47 and guided in an elongated hole 48.
  • the blade 14 is guided by webs 58 and 60 on an upper side and an underside of the blade seat (see page 10, last paragraph).
  • the blade 44 is positively engaged with a lateral T-shaped projection on an upper side of the blade carrier 44 (see page 11, paragraph 1).
  • Ribs 65 on an inside of the housing part 12b prevent lateral movement of the blade 44.
  • a knife according to the preamble of claim 1 is also from the DE 10 2011 007 234 known.
  • the object of the invention was to create a knife with a holding device that is inconspicuous for contamination.
  • the knife comprises a gear with a first gear part and a second gear part movable relative to the first gear part in order to move a blade device between a rest position in which a blade of the blade device is moved relative to a guard in such a way that the user does not come into contact with a cutting edge of the blade can come into contact and an operating position in which the blade is moved relative to the guard in such a way that a cutting operation is possible.
  • the blade device comprises a blade carrier and a blade that can be releasably fastened in the blade carrier.
  • the blade carrier is provided with a blade seat with a contact surface for a first blade surface.
  • a second blade surface opposite the first blade surface is essentially openly accessible or lies against a contact surface of the blade cover.
  • the blade carrier has a holding device for holding the blade in the blade seat, which comprises first positive locking means assigned to the blade carrier and second positive locking means assigned to the blade, which hold the blade in a positive locking manner at least in a plane parallel to the contact surface.
  • the positive locking means are designed such that the blade has at least one degree of freedom in one direction in order to be released from the blade seat.
  • the blade can be mounted, for example, between a contact surface of the blade carrier and a contact surface of a blade cover held on the blade carrier.
  • a blade cover may not be provided, so that one blade surface of the blade rests on a contact surface of the blade carrier and the opposite blade surface is exposed.
  • the holding device comprises a locking device with at least one latch that can be moved between a locking position and a release position, which engages over a region of the second blade surface or the blade cover and locks movement of the blade in the direction of the degree of freedom.
  • movement of the blade out of the blade seat is not possible in the locking position of the locking device because the degree or degrees of freedom of the blade are blocked by the lock.
  • the locking device is held on the blade carrier.
  • the latch can directly engage over at least an area of the second blade surface or at least over an area of a blade cover.
  • the latch can be releasably engaged with a receptacle which is held on the blade carrier.
  • the first positive locking means and the second positive locking means are, for example, designed such that the blade only has one degree of freedom in the pivoting direction.
  • the latch can, for example, be in contact with the blade at an end remote from the pivot axis, so that small holding forces are required due to the lever arm in order to hold the blade securely in its blade seat.
  • the first form-fitting means have, for example, at least one projection which interacts in a form-fitting manner with a complementary recess of the second form-fitting means, so that the blade can be threaded onto the projection with the recess.
  • the first form-fitting means have two projections, each projection interacting in a form-fitting manner with a recess in the blade.
  • the blade carrier has, for example, two projections and the blade has two recesses.
  • the first form-fitting means comprise, for example, at least one hook-shaped projection of the blade carrier, which releasably passes through a recess in the blade and the shape of the recess corresponds approximately to the cross section of the hook-shaped projection.
  • the blade is, for example, detachably arranged between a surface of the projection facing the second blade surface and a contact surface of the blade carrier.
  • the blade is detachably arranged between a holding surface of the projection facing the second blade surface and a contact surface of the blade carrier.
  • the locking element is designed as a wire or sheet metal.
  • the latch offers a small area for the deposition of particles that could impair the function of the knife.
  • the terms “wire” or “sheet metal” are to be understood as meaning that These can be made of metal, but other materials such as plastics or composites can also be considered. What is essential are the properties according to which, for example, a small deposit area is formed and / or according to which the material has good spring properties, as is the case with certain metals, for example.
  • the latch is designed, for example, as a spring.
  • the latch is formed by a first leg of a torsion spring.
  • the latch comprises, for example, a latch area and a storage area, the storage area being movably mounted in a bearing receptacle of the blade carrier.
  • the storage area is pivotally mounted in the bearing holder.
  • the storage area is formed, for example, by a second leg of a torsion spring, which is pivotally held in a bearing receptacle of the blade carrier.
  • the receptacle has a seat for the locking element.
  • the latch is held in the seat in such a way that it cannot accidentally come loose from the seat.
  • an area of the latch is locked into the seat.
  • the latch is loaded into the seat due to a spring force.
  • the receptacle is provided with an inclined surface which, when the bolt moves into the seat, deflects a force acting on the bolt element in a first direction into a second direction, which is directed orthogonally to the second blade surface.
  • the force can be formed, for example, by a spring force. In this way, the blade is loaded by the latch against the contact surface of the blade seat.
  • the projection also forms, for example, the receptacle for the locking element when it is arranged in the locking position. In this case, no separate element needs to be created for the seat of the locking element. In this way, space can also be kept free for structural elements on the blade carrier.
  • the locking element surrounds the blade or a recess in the blade and rests on the second blade surface.
  • FIG. 1 A knife in total according to. Fig. 1 is designated by reference number 10 in the figures.
  • the knife 10 comprises a first gear part 11 and a second gear part 12.
  • the first gear part 11 and the second gear part 12 are part of a gear 13, with which a blade device 40 comprising a blade carrier 14 and a blade 17 can be moved between a rest position and an operating position .
  • the rest position is in Fig. 1 shown. Due to a movement of the second gear part 12 in the direction u1 about a pivot axis a1 relative to the first gear part 11, the blade carrier 14 can be pivoted from the rest position into an operating position.
  • the operating position is in Fig. 2 shown. From the resting position according to Fig. 1 the second gear part 12 can be moved relative to the first gear part 11 in the direction u2, with the knife 10 in a blade changing position according to Fig. 3 is moved. In the blade changing position, the blade carrier 14 is accessible and a blade change can be carried out.
  • the blade carrier 14 comprises according to Fig. 4 a rear extension 15 for articulated mounting on the transmission 13. To form the pivot joints, the extension 15 has openings 19a and 19b.
  • the blade carrier 14 includes a blade seat 16 for fastening a blade 17, which is provided with a cutting edge 18 and includes a first blade surface 43 and a second blade surface 44 opposite the first blade surface 43.
  • the blade 17 is detachably attached to the blade carrier 14 by means of a locking device 30.
  • projections 21 and 22 are held, which in the present exemplary embodiment are cut out of the blade carrier 14 and are exposed from a plane E, which is an x / z direction, of the blade seat, so that they have a region projecting in the direction y1 and have an area that is parallel to the plane E.
  • the projections 21 and 22 pass through recesses 23 and 24 in the blade 17.
  • the projection 22 forms a seat 45.
  • a region 31 of the projection 21 that extends parallel to the plane E has a width K1 that is greater than the width K2 of the opening 23.
  • the cross section of the projection 21 corresponds approximately to the dimensions of the recess 23 in the x direction and z direction or is slightly smaller. For this reason, the blade 17 cannot be easily detached from the projection 21 in the direction y1. Rather, this requires a pivoting movement of the blade in the direction v1 Fig. 5 necessary.
  • the recess 24 in the blade is designed such that the blade 17 can be moved over the area 32 of the projection 22 when pivoting in the direction v1.
  • the pivoting guide is dictated by the shape of the projection 21.
  • a bar is arranged between a holding surface 33 of the projection 22 and the outer surface 44 of the blade 17, which prevents the blade 17 from moving in the direction v1 (see Fig. 4 ).
  • the latch is formed by a leg 27 of a spring 25, the other leg 26 of which is pivotally held in a bearing device 35 of the blade carrier 14.
  • the storage device 35 comprises an extension 36 of the blade carrier 14 (see e.g Fig. 8 ) from which two arms 29a and 29b protrude in the direction y1.
  • An opening 37a is formed in the arm 29a and an opening 37b is formed in the arm 29b.
  • the openings 37a and 37b are aligned with each other.
  • the leg 26 passes through the openings 37a and 37b, so that a pivot axis a2 is formed, about which the spring 25 can be pivoted.
  • An end region 38 of the leg 26 is bent approximately at right angles to the longitudinal extent of the leg 26 in such a way that the spring 25 cannot be released from the bearing device 35.
  • a coiled central region 39 of the spring 25 prevents the spring from moving in the direction x2 through contact with the arm 29a.
  • An end region 41 of the spring leg 27 is bent over in such a way that it is easy to grasp, so that operation by the user can be carried out easily.
  • the spring leg 27 is subject to a preload about a pivot axis a3 of the spring 25 in the direction w1 in engagement with the projection 22. Due to a movement of the leg 27 against the spring force in the direction w2 and a subsequent pivoting about the pivot axis a2 in the direction p1 in the Figures 10 to 13 position shown, the lock can be released so that the blade 17 can be removed from the blade seat 16.
  • the blade 17 In the unlocked position according to the Figures 10 to 13 The blade 17 only has one degree of freedom in the pivoting direction v1. The blade can then be removed from the blade seat 16 by pivoting in the direction v1 and, if necessary, replaced by another blade 17.
  • the blade 17 can be reassembled according to Fig. 14a the recess 23 is brought into engagement with the projection 21 and the blade 17 is then pivoted onto the projection 21 in the direction v2 (see the Fig. 14b and 14c ) until the projection 22 passes through the recess 24 and the first blade surface 43 comes into contact with the contact surface 42.
  • the leg 27 of the spring 25 is then pivoted about the axis a2 in the direction p2 and locked in the seat 45 of the projection 22 by pivoting the leg 27 slightly against the force of the spring 25 in the direction w2 and then in the direction w1 into the seat 45 is introduced.
  • the holding device 20 according to the invention with the locking device 30 is not susceptible to contamination since there are hardly any structural designs, such as undercuts, angles, etc., which promote the accumulation of particles.
  • FIGS Fig. 16 to 22 A second embodiment of a blade device 140 is shown in FIGS Fig. 16 to 22 shown. Since the knife can be designed essentially as in the first exemplary embodiment except for the blade device 140, the remaining parts are not described.
  • the blade device 140 includes a blade carrier 114 and a blade cover 129.
  • a longitudinal central axis of the blade device 140 is designated m.
  • the blade carrier 114 and the blade cover 129 are parts of a holding device 120 for a blade 117.
  • the blade carrier 114 includes a rear extension 115 on which bearing pins 119a and 119b are formed.
  • the blade carrier 114 is provided with a blade seat 116, which includes a contact surface 142 of the blade carrier 114.
  • Pins 121 and 122 protrude from the blade carrier 114.
  • the pin 121 has a notch 136.
  • a storage area 137 of the blade carrier 114 is provided for pivotally mounting the blade cover 129.
  • the blade 117 includes a cutting edge 118 and two recesses 123 and 124.
  • the blade 117 is designed, for example, as a strip steel blade or as a ceramic blade.
  • a blade surface 143 of the blade 117 interacts with the contact surface 142 and a blade surface 144 of the blade 117 interacts with a contact surface 141 of the blade cover 129 when the blade 117 is in the locking position in the blade seat 116.
  • a spring 125 which in the present example is designed as a torsion spring, is part of a locking device 130. It has two End areas 126 and 127.
  • the spring 125 is mounted on the blade device 140 by means of a bearing device 135.
  • a bearing area 128 is provided on the blade cover 129, which is designed as a bearing pin 131 and is arranged coaxially to the wound area of the torsion spring.
  • the end region 127 is supported with pretension on a stop 132 of the blade cover 129.
  • the blade cover 129 also includes a projection 133 with a link 134, which is here designed in the form of an opening in the projection 133 and which is intended to limit the movement of the end region 127 of the spring 125.
  • the backdrop could also be omitted.
  • the blade cover 129 forms a contact surface 141 which is in Fig. 22 can be recognized.
  • the blade cover 129 can be moved in the direction o2 from the open position according to 18 and 19 about a pivot axis a4 into the closed position Fig. 17 and 20 can be pivoted to 22, in which the projection 121 passes through a recess 138 in the blade cover 129. Due to the bias of the spring 125, the end region 127 lies against an upper end region 139 of the link 134. The end region of the link 134 opposite the end region 139 is designated 145.
  • the end region 127 By deflecting the end region 127 slightly in the direction n1, it can be inserted into the notch 136.
  • the locking device 130 is then in the locking position, ie the blade cover 129 is prevented from moving in the direction o1 into the open position by means of the end region 127 acting as a lock.
  • the end area 127 extends over a region of an outer surface 146 of the blade cover 129 and lies against the outer surface 146.
  • the notch 136 is arranged on the projection 121 in such a way that the end region 127 must be moved against spring force in the direction n1 in order to move it out of the notch 136. In this way, the end region 127 does not accidentally come out of engagement with the notch 136.
  • the notch 136 is designed in such a way that it forms a motion transducer, so that the spring force exerted by the end region 127 in direction n2 is partially deflected into a force which moves the end region 127 in direction y1 (see Fig. 22 ) so that it exerts a force on the blade cover 129 in the direction o2.
  • the blade 117 is held firmly between the contact surfaces 142 and 141 and blades 117 with different thicknesses D can be securely fastened in the blade seat 116.

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

Description

Die Erfindung betrifft ein Messer mit einer Klingenvorrichtung. Die Klingenvorrichtung umfasst einen Klingenträger sowie eine Klinge. Eine solche Klingenvorrichtung ist üblicherweise Bestandteil von Messern, insbesondere von Cutter-Messern.The invention relates to a knife with a blade device. The blade device includes a blade carrier and a blade. Such a blade device is usually part of knives, especially cutter knives.

Ein solches Messer ist aus der WO 99/00224 bekannt. Die WO 99/00224 betrifft ein Messer mit einem Gehäuse, welches zwei Gehäuseteile aufweist, die an einem hinteren Ende mittels eines Scharniers schwenkbar miteinander verbunden sind. Des Weiteren umfasst das Messer einen Klingenträger 44 zur Aufnahme einer Klinge 14. Der Klingenträger 44 kann in unterschiedlichen Positionen relativ zu dem Gehäuse verriegelt werden (siehe Seite 10, Absatz 2). Der Klingenträger 44 ist mittels einer Nietverbindung 47 an dem Gehäuse gehalten und in einem Langloch 48 geführt.Such a knife is from the WO 99/00224 known. The WO 99/00224 relates to a knife with a housing which has two housing parts which are pivotally connected to one another at a rear end by means of a hinge. The knife further comprises a blade carrier 44 for receiving a blade 14. The blade carrier 44 can be locked in different positions relative to the housing (see page 10, paragraph 2). The blade carrier 44 is held on the housing by means of a rivet connection 47 and guided in an elongated hole 48.

Die Klinge 14 ist gemäß einem ersten Ausführungsbeispiel an einer Oberseite und einer Unterseite des Klingensitzes von Stegen 58 und 60 geführt (siehe Seite 10, letzter Absatz). Darüber hinaus ist die Klinge 44 formschlüssig in Eingriff mit einem seitlichen T-förmigen Vorsprung an einer Oberseite des Klingenträgers 44 (siehe Seite 11, Absatz 1). Rippen 65 auf einer Innenseite des Gehäuseteils 12b verhindern eine seitliche Bewegung der Klinge 44.According to a first exemplary embodiment, the blade 14 is guided by webs 58 and 60 on an upper side and an underside of the blade seat (see page 10, last paragraph). In addition, the blade 44 is positively engaged with a lateral T-shaped projection on an upper side of the blade carrier 44 (see page 11, paragraph 1). Ribs 65 on an inside of the housing part 12b prevent lateral movement of the blade 44.

Ein Messer gemäß dem Oberbegriff von Anspruch 1 ist z.B. auch aus der DE 10 2011 007 234 bekannt.A knife according to the preamble of claim 1 is also from the DE 10 2011 007 234 known.

Es war Aufgabe der Erfindung ein Messer mit einer Haltevorrichtung zu schaffen, die unauffällig für Verschmutzungen ist.The object of the invention was to create a knife with a holding device that is inconspicuous for contamination.

Das Messer umfasst ein Getriebe mit einem ersten Getriebeteil und einem einem zu dem ersten Getriebeteil relativbeweglichen zweiten Getriebeteil, um eine Klingenvorrichtung zwischen einer Ruheposition, in welcher eine Klinge der Klingenvorrichtung so relativ zu einem Schutz bewegt ist, dass der Benutzer nicht mit einer Schneide der Klinge in Kontakt kommen kann und einer Betriebsposition, in welcher die Klinge derart relativ zu dem Schutz bewegt ist, dass ein Schneidvorgang möglich ist, zu bewegen.The knife comprises a gear with a first gear part and a second gear part movable relative to the first gear part in order to move a blade device between a rest position in which a blade of the blade device is moved relative to a guard in such a way that the user does not come into contact with a cutting edge of the blade can come into contact and an operating position in which the blade is moved relative to the guard in such a way that a cutting operation is possible.

Die Klingenvorrichtung umfasst einen Klingenträger sowie eine Klinge, die in dem Klingenträger lösbar befestigbar ist. Der Klingenträger ist mit einem Klingensitz mit einer Anlagefläche für eine erste Klingenfläche versehen. Eine der ersten Klingenfläche gegenüberliegende zweite Klingenfläche ist im Wesentlichen offen zugänglich oder liegt an einer Anlagefläche der Klingenabdeckung an.The blade device comprises a blade carrier and a blade that can be releasably fastened in the blade carrier. The blade carrier is provided with a blade seat with a contact surface for a first blade surface. A second blade surface opposite the first blade surface is essentially openly accessible or lies against a contact surface of the blade cover.

Der Klingenträger weist eine Haltevorrichtung zur Halterung der Klinge in dem Klingensitz auf, welche erste dem Klingenträger zugeordnete Formschlussmittel und zweite der Klinge zugeordnete Formschlussmittel umfasst, welche die Klinge wenigstens in einer Ebene parallel zu der Anlagefläche formschlüssig halten. Die Formschlussmittel sind derart ausgebildet, dass die Klinge wenigstens einen Freiheitsgrad in eine Richtung hat, um aus dem Klingensitz gelöst zu werden.The blade carrier has a holding device for holding the blade in the blade seat, which comprises first positive locking means assigned to the blade carrier and second positive locking means assigned to the blade, which hold the blade in a positive locking manner at least in a plane parallel to the contact surface. The positive locking means are designed such that the blade has at least one degree of freedom in one direction in order to be released from the blade seat.

Die Klinge kann z.B. zwischen einer Anlagefläche des Klingenträgers und einer Anlagefläche einer an dem Klingenträger gehaltenen Klingenabdeckung gelagert sein. Alternativ kann eine Klingenabdeckung nicht vorgesehen sein, so dass eine Klingenfläche der Klinge an einer Anlagefläche des Klingenträgers anliegt und die gegenüberliegende Klingenfläche offen liegt.The blade can be mounted, for example, between a contact surface of the blade carrier and a contact surface of a blade cover held on the blade carrier. Alternatively, a blade cover may not be provided, so that one blade surface of the blade rests on a contact surface of the blade carrier and the opposite blade surface is exposed.

Die Haltevorrichtung umfasst eine Verriegelungsvorrichtung mit wenigstens einem zwischen einer Riegelposition und einer Löseposition bewegbaren Riegel, der einen Bereich der zweiten Klingenfläche oder der Klingenabdeckung übergreift und eine Bewegung der Klinge in Richtung des Freiheitsgrades verriegelt. Mit anderen Worten eine Bewegung der Klinge aus dem Klingensitz ist in der Riegelposition der Verriegelungsvorrichtung nicht möglich, weil der oder die Freiheitsgrade der Klinge von dem Riegel versperrt werden. Die Verriegelungsvorrichtung ist an dem Klingenträger gehalten. Der Riegel kann wenigstens einen Bereich der zweiten Klingenfläche unmittelbar übergreifen oder wenigstens einen Bereich einer Klingenabdeckung übergreifen.The holding device comprises a locking device with at least one latch that can be moved between a locking position and a release position, which engages over a region of the second blade surface or the blade cover and locks movement of the blade in the direction of the degree of freedom. In other words, movement of the blade out of the blade seat is not possible in the locking position of the locking device because the degree or degrees of freedom of the blade are blocked by the lock. The locking device is held on the blade carrier. The latch can directly engage over at least an area of the second blade surface or at least over an area of a blade cover.

Der Riegel ist mit einer Aufnahme lösbar in Eingriff bringbar, welche an dem Klingenträger gehalten ist.The latch can be releasably engaged with a receptacle which is held on the blade carrier.

Die ersten Formschlussmittel und die zweiten Formschlussmittel sind z.B. derart ausgebildet, dass die Klinge lediglich einen Freiheitsgrad in Schwenkrichtung hat. Der Riegel kann z.B. an einem von der Schwenkachse entfernten Ende mit der Klinge in Kontakt stehen, so dass aufgrund des Hebelarms geringe Haltekräfte erforderlich sind, um die Klinge sicher in ihrem Klingensitz zu halten.The first positive locking means and the second positive locking means are, for example, designed such that the blade only has one degree of freedom in the pivoting direction. The latch can, for example, be in contact with the blade at an end remote from the pivot axis, so that small holding forces are required due to the lever arm in order to hold the blade securely in its blade seat.

Die ersten Formschlussmittel weisen z.B. wenigstens einen Vorsprung auf, welcher mit einer komplementären Aussparung der zweiten Formschlussmittel formschlüssig zusammenwirkt, so dass die Klinge mit der Aussparung auf den Vorsprung fädelbar ist. Z.B. weisen die ersten Formschlussmittel zwei Vorsprünge auf, wobei jeder Vorsprung mit einer Aussparung der Klinge formschlüssig zusammenwirkt. Der Klingenträger weist also in diesem Fall z.B. zwei Vorsprünge und die Klinge weist zwei Aussparungen auf.The first form-fitting means have, for example, at least one projection which interacts in a form-fitting manner with a complementary recess of the second form-fitting means, so that the blade can be threaded onto the projection with the recess. For example, the first form-fitting means have two projections, each projection interacting in a form-fitting manner with a recess in the blade. In this case, the blade carrier has, for example, two projections and the blade has two recesses.

Die ersten Formschlussmittel umfassen z.B. wenigstens einen hakenförmigen Vorsprung des Klingenträgers, welcher lösbar eine Aussparung der Klinge durchgreift und wobei die Form der Aussparung etwa dem Querschnitt des hakenförmigen Vorsprungs entspricht. Die Klinge ist z.B. lösbar zwischen einer zu der zweiten Klingenfläche gewandten Fläche des Vorsprungs und einer Anlagefläche des Klingenträgers angeordnet.The first form-fitting means comprise, for example, at least one hook-shaped projection of the blade carrier, which releasably passes through a recess in the blade and the shape of the recess corresponds approximately to the cross section of the hook-shaped projection. The blade is, for example, detachably arranged between a surface of the projection facing the second blade surface and a contact surface of the blade carrier.

Gemäß einer Ausgestaltung der Erfindung ist die Klinge lösbar zwischen einer der zweiten Klingenfläche zugewandten Haltefläche des Vorsprungs und einer Anlagefläche des Klingenträgers angeordnet.According to one embodiment of the invention, the blade is detachably arranged between a holding surface of the projection facing the second blade surface and a contact surface of the blade carrier.

Eine Ausführungsform ist dadurch gekennzeichnet, dass das Riegelelement als Draht oder als Blech ausgebildet ist. Auf diese Weise bietet der Riegel eine geringe Fläche zur Ablagerung von Partikeln, welche die Funktion des Messers beeinträchtigen könnten. Die Begriffe "Draht" oder "Blech" sind im Sinne der Erfindung so zu verstehen, dass diese aus einem Metall bestehen können, dass aber auch andere Materialien, wie Kunststoffe oder Verbundstoffe dafür in Betracht kommen. Wesentlich sind die Eigenschaften, wonach z.B. eine geringe Ablagerungsfläche ausgebildet wird und / oder wonach gute Federeigenschaften des Werkstoffs vorhanden sind, wie es z.B. bei bestimmten Metallen der Fall ist.One embodiment is characterized in that the locking element is designed as a wire or sheet metal. In this way, the latch offers a small area for the deposition of particles that could impair the function of the knife. For the purposes of the invention, the terms “wire” or “sheet metal” are to be understood as meaning that These can be made of metal, but other materials such as plastics or composites can also be considered. What is essential are the properties according to which, for example, a small deposit area is formed and / or according to which the material has good spring properties, as is the case with certain metals, for example.

Der Riegel ist z.B. als Feder ausgebildet. Z.B. ist der Riegel von einem ersten Schenkel einer Drehfeder gebildet.The latch is designed, for example, as a spring. For example, the latch is formed by a first leg of a torsion spring.

Der Riegel umfasst z.B. einen Riegelbereich und einen Lagerbereich, wobei der Lagerbereich bewegbar in einer Lageraufnahme des Klingenträgers gelagert ist. Z.B. ist der Lagerbereich schwenkbar in der Lageraufnahme gelagert. Der Lagerbereich ist z.B. von einem zweiten Schenkel einer Drehfeder gebildet, der schwenkbar in einer Lageraufnahme des Klingenträgers gehalten ist.The latch comprises, for example, a latch area and a storage area, the storage area being movably mounted in a bearing receptacle of the blade carrier. For example, the storage area is pivotally mounted in the bearing holder. The storage area is formed, for example, by a second leg of a torsion spring, which is pivotally held in a bearing receptacle of the blade carrier.

Z.B. weist die Aufnahme einen Sitz für das Riegelelement auf. In dem Sitz ist der Riegel z.B. derart gehalten, dass er sich nicht ungewollt aus dem Sitz lösen kann. Z.B. ist ein Bereich des Riegels in dem Sitz verrastet. Alternativ oder zusätzlich wird der Riegel aufgrund einer Federkraft in den Sitz belastet.For example, the receptacle has a seat for the locking element. For example, the latch is held in the seat in such a way that it cannot accidentally come loose from the seat. For example, an area of the latch is locked into the seat. Alternatively or additionally, the latch is loaded into the seat due to a spring force.

Z.B. ist die Aufnahme mit einer Schrägfläche versehen, welche bei der Bewegung des Riegels in den Sitz eine auf das Riegelelement in eine erste Richtung wirkende Kraft in eine zweite Richtung umlenkt, die orthogonal zu der zweiten Klingenfläche gerichtet ist. Die Kraft kann z.B. von einer Federkraft gebildet sein. Auf diese Weise wird die Klinge von dem Riegel gegen die Anlagefläche des Klingensitzes belastet.For example, the receptacle is provided with an inclined surface which, when the bolt moves into the seat, deflects a force acting on the bolt element in a first direction into a second direction, which is directed orthogonally to the second blade surface. The force can be formed, for example, by a spring force. In this way, the blade is loaded by the latch against the contact surface of the blade seat.

Der Vorsprung bildet z.B. zugleich die Aufnahme für das Riegelelement, wenn es in der Riegelposition angeordnet ist. In diesem Fall muss kein gesondertes Element für den Sitz des Riegelelements erzeugt werden. Auch kann auf diese Weise Raum für konstruktive Elemente an dem Klingenträger freigehalten werden.The projection also forms, for example, the receptacle for the locking element when it is arranged in the locking position. In this case, no separate element needs to be created for the seat of the locking element. In this way, space can also be kept free for structural elements on the blade carrier.

In der Riegelposition umgreift z.B. das Riegelelement die Klinge oder eine Aussparung der Klinge und liegt an der zweiten Klingenfläche an.In the locking position, for example, the locking element surrounds the blade or a recess in the blade and rests on the second blade surface.

Ein Ausführungsbeispiel der Erfindung ist der nachfolgenden Figurenbeschreibung, auch unter Bezugnahme auf die schematischen Zeichnungen, beispielhaft beschrieben. Dabei werden der Übersichtlichkeit halber - auch soweit unterschiedliche Ausführungsbeispiele betroffen sind - gleiche oder vergleichbare Teile oder Elemente oder Bereiche mit gleichen Bezugszeichen, teilweise unter Hinzufügung kleiner Buchstaben, bezeichnet.An exemplary embodiment of the invention is described by way of example in the following description of the figures, also with reference to the schematic drawings. For the sake of clarity - even as far as different exemplary embodiments are concerned - the same or comparable parts or elements or areas are designated with the same reference numbers, sometimes with the addition of small letters.

Merkmale, die nur in Bezug auf ein Ausführungsbeispiel beschrieben, dargestellt oder offenbart sind, können im Rahmen der Erfindung auch bei jedem anderem Ausführungsbeispiel der Erfindung vorgesehen werden. Derartig geänderte Ausführungsbeispiele sind - auch wenn sie in den Zeichnungen nicht dargestellt sind - von der Erfindung mit umfasst sofern sie unter den Schutzbereich der Ansprüche fallen.Features that are described, illustrated or disclosed only in relation to one exemplary embodiment can also be provided within the scope of the invention in any other exemplary embodiment of the invention. Such modified exemplary embodiments are included in the invention - even if they are not shown in the drawings - provided they fall within the scope of protection of the claims.

Es zeigen:

  • Fig. 1 eine Seitenansicht eines Messers in der Ruheposition,
  • Fig. 2 eine Seitenansicht des Messers in einer Betriebsposition,
  • Fig. 3 eine Seitenansicht des Messers in einer Klingenwechselposition,
  • Fig. 4 eine Seitenansicht einer Klingenvorrichtung des Messers, umfassend einen Klingenträger sowie eine daran gehaltene Klinge, wobei sich eine Verriegelungsvorrichtung in einer Riegelposition befindet,
  • Fig. 5 eine Schnittdarstellung gemäß Schnittlinie A-A in Fig. 4,
  • Fig. 6a ein Ausschnitt gemäß Ausschnittlinie C in Fig. 5,
  • Fig. 6b ein Ausschnitt gemäß Ausschnittlinie D in Fig. 5,
  • Fig. 7 eine Ansicht gemäß Ansichtspfeil B in Fig. 4,
  • Fig. 8 eine perspektivische Ansicht des Klingenträgers gemäß Fig. 4 von schräg hinten,
  • Fig. 9 eine perspektivische Ansicht des Klingenträgers gemäß Fig. 4 von schräg vorn,
  • Fig. 10 eine Seitenansicht des Klingenträgers gemäß Fig. 4, wobei sich eine Verriegelungsvorrichtung in der Löseposition befindet,
  • Fig. 11 eine Ansicht gemäß Ansichtspfeil E in Fig. 10,
  • Fig. 12 eine Ansicht gemäß Ansichtspfeil F in Fig. 10,
  • Fig. 13 eine perspektivische Ansicht des Klingenträgers gemäß Fig. 10 von schräg hinten,
  • Fig. 14a bis 14d eine Darstellung des Verfahrens zur Montage der Klinge an dem Klingenträger,
  • Fig. 15 eine Explosionsdarstellung des Klingenträgers.
  • Fig. 16 eine Expolsionsdarstellung eines zweiten Ausführungsbeispiels des Klingenträgers,
  • Fig. 17 eine perspektivische Darstellung des Klingenträgers, wobei sich die Verriegelungsvorrichtung in einer Riegelposition befindet,
  • Fig. 18 eine perspektivische Darstellung des Klingenträgers, wobei sich die Verriegelungsvorrichtung in der Löseposition befindet,
  • Fig. 19 eine perspektivische Darstellung des Klingenträgers, wobei sich die Verriegelungsvorrichtung in der Löseposition befindet,
  • Fig. 20 eine Seitenansicht des Klingenträgers in der Riegelposition der Verriegelungsvorrichtung,
  • Fig. 21 eine Schnittdarstellung gemäß Schnittlinie F - F in Fig. 20,
  • Fig. 22 eine Ansicht gemäß Ansichtspfeil G in Fig. 20.
Show it:
  • Fig. 1 a side view of a knife in the rest position,
  • Fig. 2 a side view of the knife in an operating position,
  • Fig. 3 a side view of the knife in a blade changing position,
  • Fig. 4 a side view of a blade device of the knife, comprising a blade carrier and a blade held thereon, with a locking device being in a locking position,
  • Fig. 5 a sectional view according to section line AA in Fig. 4 ,
  • Fig. 6a a cutout according to cutout line C in Fig. 5 ,
  • Fig. 6b a cutout according to cutout line D in Fig. 5 ,
  • Fig. 7 a view according to view arrow B in Fig. 4 ,
  • Fig. 8 a perspective view of the blade carrier according to Fig. 4 from diagonally behind,
  • Fig. 9 a perspective view of the blade carrier according to Fig. 4 from diagonally in front,
  • Fig. 10 a side view of the blade carrier according to Fig. 4 , with a locking device in the release position,
  • Fig. 11 a view according to view arrow E in Fig. 10 ,
  • Fig. 12 a view according to view arrow F in Fig. 10 ,
  • Fig. 13 a perspective view of the blade carrier according to Fig. 10 from diagonally behind,
  • Fig. 14a to 14d a representation of the method for mounting the blade on the blade carrier,
  • Fig. 15 an exploded view of the blade carrier.
  • Fig. 16 an exploded view of a second embodiment of the blade carrier,
  • Fig. 17 a perspective view of the blade carrier, with the locking device in a locking position,
  • Fig. 18 a perspective view of the blade carrier, with the locking device in the release position,
  • Fig. 19 a perspective view of the blade carrier, with the locking device in the release position,
  • Fig. 20 a side view of the blade carrier in the locking position of the locking device,
  • Fig. 21 a sectional view according to section line F - F in Fig. 20 ,
  • Fig. 22 a view according to view arrow G in Fig. 20 .

Eine Messer insgesamt gem. Fig. 1 wird in den Figuren mit dem Bezugszeichen 10 bezeichnet.A knife in total according to. Fig. 1 is designated by reference number 10 in the figures.

Das Messer 10 umfasst ein erstes Getriebeteil 11 sowie ein zweites Getriebeteil 12. Das erste Getriebeteil 11 sowie das zweite Getriebeteil 12 sind Teil eines Getriebes 13, mit welchem eine Klingenvorrichtung 40 umfassend einen Klingenträger 14 sowie eine Klinge 17 zwischen einer Ruheposition und einer Betriebsposition bewegbar ist. Die Ruheposition ist in Fig. 1 dargestellt. Aufgrund einer Bewegung des zweiten Getriebeteils 12 in Richtung u1 um eine Schwenkachse a1 relativ zu dem ersten Getriebeteil 11 kann der Klingenträger 14 aus der Ruheposition in eine Betriebsposition geschwenkt werden. Die Betriebsposition ist in Fig. 2 dargestellt. Aus der Ruheposition gemäß Fig. 1 ist das zweite Getriebeteil 12 relativ zu dem ersten Getriebeteil 11 in Richtung u2 bewegbar, wobei das Messer 10 in eine Klingenwechselposition gemäß Fig. 3 bewegt wird. In der Klingenwechselposition ist der Klingenträger 14 zugänglich und ein Klingenwechsel kann durchgeführt werden.The knife 10 comprises a first gear part 11 and a second gear part 12. The first gear part 11 and the second gear part 12 are part of a gear 13, with which a blade device 40 comprising a blade carrier 14 and a blade 17 can be moved between a rest position and an operating position . The rest position is in Fig. 1 shown. Due to a movement of the second gear part 12 in the direction u1 about a pivot axis a1 relative to the first gear part 11, the blade carrier 14 can be pivoted from the rest position into an operating position. The operating position is in Fig. 2 shown. From the resting position according to Fig. 1 the second gear part 12 can be moved relative to the first gear part 11 in the direction u2, with the knife 10 in a blade changing position according to Fig. 3 is moved. In the blade changing position, the blade carrier 14 is accessible and a blade change can be carried out.

Der Klingenträger 14 umfasst gemäß Fig. 4 einen hinteren Fortsatz 15 zur gelenkigen Lagerung an dem Getriebe 13. Zur Ausbildung der Schwenkgelenke weist der Fortsatz 15 Öffnungen 19a und 19b auf. Außerdem umfasst der Klingenträger 14 einen Klingensitz 16 zur Befestigung einer Klinge 17, die mit einer Schneide 18 versehen ist sowie eine erste Klingenfläche 43 und eine der ersten Klingenfläche 43 gegenüberliegende zweite Klingenfläche 44 umfasst. Mittels einer Verriegelungsvorrichtung 30 ist die Klinge 17 lösbar an dem Klingenträger 14 befestigt. An dem Klingenträger 14 sind Vorsprünge 21 und 22 gehalten, die im vorliegenden Ausführungsbeispiel aus dem Klingenträger 14 ausgeschnitten und aus einer Ebene E die eine x-/z-Richtung ist, des Klingensitzes herausgestellt sind, so dass sie einen in Richtung y1 vorragenden Bereich und einen Bereich aufweisen, der parallel zu der Ebene E ausgebildet ist. Die Vorsprünge 21 und 22 durchgreifen Aussparungen 23 und 24 in der Klinge 17. Der Vorsprung 22 bildet einen Sitz 45.The blade carrier 14 comprises according to Fig. 4 a rear extension 15 for articulated mounting on the transmission 13. To form the pivot joints, the extension 15 has openings 19a and 19b. In addition, the blade carrier 14 includes a blade seat 16 for fastening a blade 17, which is provided with a cutting edge 18 and includes a first blade surface 43 and a second blade surface 44 opposite the first blade surface 43. The blade 17 is detachably attached to the blade carrier 14 by means of a locking device 30. On the blade carrier 14, projections 21 and 22 are held, which in the present exemplary embodiment are cut out of the blade carrier 14 and are exposed from a plane E, which is an x / z direction, of the blade seat, so that they have a region projecting in the direction y1 and have an area that is parallel to the plane E. The projections 21 and 22 pass through recesses 23 and 24 in the blade 17. The projection 22 forms a seat 45.

Ein sich parallel zu der Ebene E erstreckender Bereich 31 des Vorsprungs 21 weist eine Breite K1 auf, die größer ist als die Breite K2 der Öffnung 23. Der Querschnitt des Vorsprungs 21 entspricht etwa den Abmaßen der Aussparung 23 in x-Richtung und z-Richtung bzw. ist geringfügig kleiner. Aus diesem Grunde kann die Klinge 17 nicht ohne Weiteres in Richtung y1 von dem Vorsprung 21 gelöst werden. Vielmehr ist hierfür eine Schwenkbewegung der Klinge in Richtung v1 gemäß Fig. 5 notwendig. Die Aussparung 24 in der Klinge ist derart ausgebildet, dass die Klinge 17 beim Schwenken in Richtung v1 über den Bereich 32 des Vorsprungs 22 hinweg bewegt werden kann. Die Schwenkführung ist von der Form des Vorsprungs 21 vorgegeben.A region 31 of the projection 21 that extends parallel to the plane E has a width K1 that is greater than the width K2 of the opening 23. The cross section of the projection 21 corresponds approximately to the dimensions of the recess 23 in the x direction and z direction or is slightly smaller. For this reason, the blade 17 cannot be easily detached from the projection 21 in the direction y1. Rather, this requires a pivoting movement of the blade in the direction v1 Fig. 5 necessary. The recess 24 in the blade is designed such that the blade 17 can be moved over the area 32 of the projection 22 when pivoting in the direction v1. The pivoting guide is dictated by the shape of the projection 21.

Zwischen einer Haltefläche 33 des Vorsprungs 22 und der Außenfläche 44 der Klinge 17 ist ein Riegel angeordnet, der eine Bewegung der Klinge 17 in Richtung v1 verhindert (siehe Fig. 4). Der Riegel ist im vorliegenden Ausführungsbeispiel von einem Schenkel 27 einer Feder 25 gebildet, deren anderer Schenkel 26 in einer Lagervorrichtung 35 des Klingenträgers 14 schwenkbar gehalten ist.A bar is arranged between a holding surface 33 of the projection 22 and the outer surface 44 of the blade 17, which prevents the blade 17 from moving in the direction v1 (see Fig. 4 ). In the present exemplary embodiment, the latch is formed by a leg 27 of a spring 25, the other leg 26 of which is pivotally held in a bearing device 35 of the blade carrier 14.

Im vorliegenden Ausführungsbeispiel umfasst die Lagervorrichtung 35 einen Fortsatz 36 des Klingenträgers 14 (siehe z.B. Fig. 8) von welchem zwei Arme 29a und 29b in Richtung y1 vorragen. In dem Arm 29a ist eine Öffnung 37a und in dem Arm 29b eine Öffnung 37b ausgebildet. Die Öffnungen 37a und 37b fluchten miteinander. Der Schenkel 26 durchgreift die Öffnungen 37a und 37b, so dass eine Schwenkachse a2 gebildet ist, um welche die Feder 25 geschwenkt werden kann. Ein Endbereich 38 des Schenkels 26 ist derart etwa rechtwinklig zu der Längserstreckung des Schenkels 26 umgebogen, dass die Feder 25 nicht von der Lagervorrichtung 35 gelöst werden kann. Ein gewundener Zentralbereich 39 der Feder 25 verhindert durch den Kontakt mit dem Arm 29a eine Bewegung der Feder in Richtung x2.In the present exemplary embodiment, the storage device 35 comprises an extension 36 of the blade carrier 14 (see e.g Fig. 8 ) from which two arms 29a and 29b protrude in the direction y1. An opening 37a is formed in the arm 29a and an opening 37b is formed in the arm 29b. The openings 37a and 37b are aligned with each other. The leg 26 passes through the openings 37a and 37b, so that a pivot axis a2 is formed, about which the spring 25 can be pivoted. An end region 38 of the leg 26 is bent approximately at right angles to the longitudinal extent of the leg 26 in such a way that the spring 25 cannot be released from the bearing device 35. A coiled central region 39 of the spring 25 prevents the spring from moving in the direction x2 through contact with the arm 29a.

Ein Endbereich 41 des Federschenkels 27 ist derart umgebogen, dass er leicht greifbar ist, so dass eine Betätigung durch den Benutzer leicht erfolgen kann.An end region 41 of the spring leg 27 is bent over in such a way that it is easy to grasp, so that operation by the user can be carried out easily.

Der Federschenkel 27 unterliegt einer Vorspannung um eine Schwenkachse a3 der Feder 25 in Richtung w1 in Eingriff mit dem Vorsprung 22. Aufgrund einer Bewegung des Schenkels 27 entgegen der Federkraft in Richtung w2 und ein anschließendes Schwenken um die Schwenkachse a2 in Richtung p1 in die in den Figuren 10 bis 13 dargestellte Position, kann die Verriegelung gelöst werden, so dass die Klinge 17 aus dem Klingensitz 16 entnommen werden kann.The spring leg 27 is subject to a preload about a pivot axis a3 of the spring 25 in the direction w1 in engagement with the projection 22. Due to a movement of the leg 27 against the spring force in the direction w2 and a subsequent pivoting about the pivot axis a2 in the direction p1 in the Figures 10 to 13 position shown, the lock can be released so that the blade 17 can be removed from the blade seat 16.

In der entriegelten Position gemäß der Figuren 10 bis 13 hat die Klinge 17 lediglich einen Freiheitsgrad in Schwenkrichtung v1. Die Klinge kann dann durch schwenken in Richtung v1 aus dem Klingensitz 16 entfernt werden und ggf. durch eine andere Klinge 17 ersetzt werden.In the unlocked position according to the Figures 10 to 13 The blade 17 only has one degree of freedom in the pivoting direction v1. The blade can then be removed from the blade seat 16 by pivoting in the direction v1 and, if necessary, replaced by another blade 17.

Die Klinge 17 kann wieder montiert werden, indem gemäß Fig. 14a die Aussparung 23 in Eingriff mit dem Vorsprung 21 gebracht und die Klinge 17 dann in Richtung v2 auf den Vorsprung 21 aufgeschwenkt wird (siehe die Fig. 14b und 14c) bis der Vorsprung 22 die Aussparung 24 durchgreift und die erste Klingenfläche 43 in Kontakt mit der Anlagefläche 42 kommt.The blade 17 can be reassembled according to Fig. 14a the recess 23 is brought into engagement with the projection 21 and the blade 17 is then pivoted onto the projection 21 in the direction v2 (see the Fig. 14b and 14c ) until the projection 22 passes through the recess 24 and the first blade surface 43 comes into contact with the contact surface 42.

Anschließend wird der Schenkel 27 der Feder 25 um die Achse a2 in Richtung p2 geschwenkt und in dem Sitz 45 des Vorsprungs 22 verrastet, indem der Schenkel 27 etwas entgegen der Kraft der Feder 25 in Richtung w2 geschwenkt wird und dann in Richtung w1 in den Sitz 45 eingeführt wird.The leg 27 of the spring 25 is then pivoted about the axis a2 in the direction p2 and locked in the seat 45 of the projection 22 by pivoting the leg 27 slightly against the force of the spring 25 in the direction w2 and then in the direction w1 into the seat 45 is introduced.

Die erfindungsgemäße Haltevorrichtung 20 mit der Verriegelungsvorrichtung 30 ist unanfällig für Verschmutzung, da es kaum konstruktive Gestaltungen, wie Hinterschneidungen, Winkel, etc. gibt, die die Ansammlung von Partikeln begünstigen.The holding device 20 according to the invention with the locking device 30 is not susceptible to contamination since there are hardly any structural designs, such as undercuts, angles, etc., which promote the accumulation of particles.

Ein zweites Ausführungsbeispiel einer Klingenvorrichtung 140 ist in den Fig. 16 bis 22 dargestellt. Da das Messer bis auf die Klingenvorrichtung 140 im Wesentlichen wie bei dem ersten Ausführungsbeispiel ausgebildet sein kann, sind die übrigen Teile nicht beschrieben.A second embodiment of a blade device 140 is shown in FIGS Fig. 16 to 22 shown. Since the knife can be designed essentially as in the first exemplary embodiment except for the blade device 140, the remaining parts are not described.

Die Klingenvorrichtung 140 umfasst einen Klingenträger 114 sowie eine Klingenabdeckung 129. Eine Längsmittelachse der Klingenvorrichtung 140 ist mit m bezeichnet. Der Klingenträger 114 sowie die Klingenabdeckung 129 sind Teile einer Haltevorrichtung 120 für eine Klinge 117. Gemäß Fig. 16 umfasst der Klingenträger 114 einen hinteren Fortsatz 115 an welchem Lagerzapfen 119a und 119b ausgebildet sind. Der Klingenträger 114 ist mit einem Klingensitz 116 versehen, welcher eine Anlagefläche 142 des Klingenträgers 114 umfasst. Von dem Klingenträger 114 ragen Zapfen 121 und 122 vor. Der Zapfen 121 weist eine Kerbe 136 auf. Ein Lagerbereich 137 des Klingenträgers 114 ist zur schwenkbaren Lagerung der Klingenabdeckung 129 vorgesehen.The blade device 140 includes a blade carrier 114 and a blade cover 129. A longitudinal central axis of the blade device 140 is designated m. The blade carrier 114 and the blade cover 129 are parts of a holding device 120 for a blade 117. According to Fig. 16 The blade carrier 114 includes a rear extension 115 on which bearing pins 119a and 119b are formed. The blade carrier 114 is provided with a blade seat 116, which includes a contact surface 142 of the blade carrier 114. Pins 121 and 122 protrude from the blade carrier 114. The pin 121 has a notch 136. A storage area 137 of the blade carrier 114 is provided for pivotally mounting the blade cover 129.

Die Klinge 117 umfasst eine Schneide 118 sowie zwei Aussparungen 123 und 124. Die Klinge 117 ist z.B. als Bandstahlklinge oder als Keramikklinge ausgebildet. Eine Klingenfläche 143 der Klinge 117 wirkt mit der Anlagefläche 142 und eine Klingenfläche 144 der Klinge 117 wirkt mit einer Anlagefläche 141 der Klingenabdeckung 129 zusammen, wenn sich die Klinge 117 in der Riegelposition in dem Klingensitz 116 befindet.The blade 117 includes a cutting edge 118 and two recesses 123 and 124. The blade 117 is designed, for example, as a strip steel blade or as a ceramic blade. A blade surface 143 of the blade 117 interacts with the contact surface 142 and a blade surface 144 of the blade 117 interacts with a contact surface 141 of the blade cover 129 when the blade 117 is in the locking position in the blade seat 116.

Eine Feder 125, die im vorliegenden Beispiel als Drehfeder ausgebildet ist, ist Teil einer Verriegelungsvorrichtung 130. Sie weist zwei Endbereiche 126 und 127 auf. Die Feder 125 ist mittels einer Lagervorrichtung 135 an der Klingenvorrichtung 140 gelagert. Hier ist ein Lagerbereich 128 an der Klingenabdeckung 129 vorgesehen, der als Lagerzapfen 131 ausgebildet ist und koaxial zu dem gewundenen Bereich der Drehfeder angeordnet ist. Der Endbereich 127 stützt sich mit Vorspannung an einem Anschlag 132 der Klingenabdeckung 129 ab. Die Klingenabdeckung 129 umfasst außerdem einen Vorsprung 133 mit einer Kulisse 134, die hier in Form einer Öffnung in dem Vorsprung 133 ausgebildet ist und welche zur Bewegungsbegrenzung des Endbereichs 127 der Feder 125 vorgesehen ist. Die Kulisse könnte aber alternativ auch weggelassen werden.A spring 125, which in the present example is designed as a torsion spring, is part of a locking device 130. It has two End areas 126 and 127. The spring 125 is mounted on the blade device 140 by means of a bearing device 135. Here, a bearing area 128 is provided on the blade cover 129, which is designed as a bearing pin 131 and is arranged coaxially to the wound area of the torsion spring. The end region 127 is supported with pretension on a stop 132 of the blade cover 129. The blade cover 129 also includes a projection 133 with a link 134, which is here designed in the form of an opening in the projection 133 and which is intended to limit the movement of the end region 127 of the spring 125. Alternatively, the backdrop could also be omitted.

Die Klingenabdeckung 129 bildet eine Anlagefläche 141 aus, die in Fig. 22 zu erkennen ist.The blade cover 129 forms a contact surface 141 which is in Fig. 22 can be recognized.

Wenn eine Klinge 117 derart in dem Klingensitz 116 montiert ist, dass die Klingenfläche 143 an der Anlagefläche 142 anliegt, und der Vorsprung 121 die Aussparung 123 sowie der Vorsprung 122 die Aussparung 124 durchgreifen, kann die Klingenabdeckung 129 in Richtung o2 aus der Offenposition gemäß der Fig. 18 und 19 um eine Schwenkachse a4 in die Geschlossenposition gemäß Fig. 17 und 20 bis 22 geschwenkt werden, in welcher der Vorsprung 121 eine Aussparung 138 der Klingenabdeckung 129 durchgreift. Aufgrund der Vorspannung der Feder 125 liegt der Endbereich 127 an einem oberen Endbereich 139 der Kulisse 134 an. Der dem Endbereich 139 gegenüber liegende Endbereich der Kulisse 134 ist mit 145 bezeichnet.If a blade 117 is mounted in the blade seat 116 in such a way that the blade surface 143 rests on the contact surface 142, and the projection 121 passes through the recess 123 and the projection 122 passes through the recess 124, the blade cover 129 can be moved in the direction o2 from the open position according to 18 and 19 about a pivot axis a4 into the closed position Fig. 17 and 20 can be pivoted to 22, in which the projection 121 passes through a recess 138 in the blade cover 129. Due to the bias of the spring 125, the end region 127 lies against an upper end region 139 of the link 134. The end region of the link 134 opposite the end region 139 is designated 145.

Indem der Endbereich 127 etwas in Richtung n1 ausgelenkt wird, kann er in die Kerbe 136 eingesetzt werden. Die Verriegelungsvorrichtung 130 befindet sich dann in der Riegelposition, d.h. die Klingenabdeckung 129 ist mittels des als Riegel wirkenden Endbereichs 127 an einer Bewegung in Richtung o1 in die Offenposition gehindert. Der Endbereich 127 erstreckt sich über einen Bereich einer Außenfläche 146 der Klingenabdeckung 129 und liegt an der Außenfläche 146 an.By deflecting the end region 127 slightly in the direction n1, it can be inserted into the notch 136. The locking device 130 is then in the locking position, ie the blade cover 129 is prevented from moving in the direction o1 into the open position by means of the end region 127 acting as a lock. The end area 127 extends over a region of an outer surface 146 of the blade cover 129 and lies against the outer surface 146.

Die Kerbe 136 ist derart an dem Vorsprung 121 angeordnet, dass der Endbereich 127 entgegen Federkraft in Richtung n1 bewegt werden muss, um ihn aus der Kerbe 136 herauszubewegen. Auf diese Weise löst sich der Endbereich 127 nicht ungewollt aus dem Eingriff mit der Kerbe 136.The notch 136 is arranged on the projection 121 in such a way that the end region 127 must be moved against spring force in the direction n1 in order to move it out of the notch 136. In this way, the end region 127 does not accidentally come out of engagement with the notch 136.

Die Kerbe 136 ist derart ausgebildet, dass sie einen Bewegungswandler bildet, so dass die von dem Endbereich 127 ausgeübte Federkraft in Richtung n2 teilweise in eine Kraft umgelenkt wird, die den Endbereich 127 in Richtung y1 (siehe Fig. 22) belastet, so dass dieser eine Kraft auf die Klingenabdeckung 129 in Richtung o2 ausübt. Auf diese Weise ist die Klinge 117 fest zwischen den Anlageflächen 142 und 141 gehalten und Klingen 117 mit unterschiedlicher Dicke D können in dem Klingensitz 116 sicher befestigt werden.The notch 136 is designed in such a way that it forms a motion transducer, so that the spring force exerted by the end region 127 in direction n2 is partially deflected into a force which moves the end region 127 in direction y1 (see Fig. 22 ) so that it exerts a force on the blade cover 129 in the direction o2. In this way, the blade 117 is held firmly between the contact surfaces 142 and 141 and blades 117 with different thicknesses D can be securely fastened in the blade seat 116.

Claims (12)

  1. Knife having a gear comprising a first gear part and a second gear part which can be moved relative to the first gear part, and having a blade device (40) comprising a blade support (14) and a blade (17), which can be releasably fixed in the blade support (14), wherein the blade device is moved by the gear between a resting position, in which the blade (17) of the blade device (40) is moved relative to a guard such that the user cannot come into contact with the sharp edge (18) of the blade (17), and an operating position, in which the blade (17) is moved relative to the guard such that a cutting process is possible, wherein the blade support (14) comprises a blade seat (16) having a contact surface (42) for a first blade surface (43), and a second blade surface (44) opposite the first blade surface (43) is substantially freely accessible, wherein the blade support (14) has a holding device (20) for holding the blade (17) in the blade seat (16), said holding device comprising first form fitting means assigned to the blade carrier (14) and second form fitting means assigned to the blade (17), which hold the blade (17) in a form fitting manner at least in a plane in parallel with the contact surface (42), wherein the form fitting means are designed such that the blade (17) has a degree of freedom in at least one direction (v1) in order to be released from the blade seat (16), characterised in that the holding device (20) has a locking device (30) having at least one bolt which can be moved between a bolted position and a released position, which engages in the bolted position over a region of the second blade surface (44) or a blade cover (129), and locks a movement of the blade (17, 117) in the direction (v1, y2) of the degree of freedom, wherein the bolt can be brought into releasable engagement with an receiver which is held on the blade support.
  2. Knife according to claim 1, characterised in that the first form fitting means and the second form fitting means are designed such that the blade (17) has only one degree of freedom in a first pivot direction (v1).
  3. Knife according to one of the preceding claims, characterised in that the form fitting means have at least one projection (21, 22) which engages with a complementary recess (23, 24) of the second form fitting means, such that the blade (17) with the recess (23, 24) can be threaded onto the projection (21, 22).
  4. Knife according to claim 3, characterised in that the first form fitting means have at least one hook-shaped projection (21) which passes releasably through a recess (23) of the blade (17), wherein the shape of the recess (23) approximately corresponds to the cross-section of the hook-shaped projection (21).
  5. Knife according to one of claims 3 or 4, characterised in that the blade (17) is releasably arranged between a holding surface (33) of the projection (21, 22) facing the second blade surface (44) and a contact surface (42) of the blade support (14).
  6. Knife according to one of the preceding claims, characterised in that the bolt is designed as a wire or as sheet metal.
  7. Knife according to one of the preceding claims, characterised in that the moveable bolt is designed as a spring.
  8. Knife according to one of the preceding claims, characterised in that the bolt forms a bolt region (27) and a bearing region (26).
  9. Knife according to one of the preceding claims, characterised in that the receiver is provided with an oblique surface, which diverts a force acting in a first direction on the bolt in a second direction, which is aligned orthogonally to the second blade surface.
  10. Knife according to one of the preceding claims, characterised in that the at least one bolt surrounds the blade (17) in the bolted position, and abuts on the second blade surface (44).
  11. Knife according to claim 1, characterised in that the blade device comprises a blade support (114) and a blade cover (129).
  12. Knife according to claim 11, characterised in that the blade cover (129) is pivotably mounted on the blade support (114).
EP20158515.5A 2019-02-23 2020-02-20 Knife with blade device Active EP3698928B1 (en)

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DE102013014684A1 (en) * 2013-09-05 2015-03-05 Martor Kg knife
DE102018117203B4 (en) * 2018-07-17 2024-02-01 Martor Kg Knife

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EP3698928A1 (en) 2020-08-26
CN111604944B (en) 2022-06-17
US20200276721A1 (en) 2020-09-03
CN111604944A (en) 2020-09-01
US11376751B2 (en) 2022-07-05

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