FR3033277A1 - DEVICE FOR CUTTING IRON WIRE - Google Patents

Abstract

Wire cutter (1) comprising a knife (3) comprising a blade (4) comprising a cutting edge, a cutting edge (11), and a pivoting orifice (10), and a cutting tool (2) comprising a base (6) from which extends a pin (7) adapted to engage in the pivot hole (10) of the blade (4). According to the invention, the lug (7) is cylindrical, and the base (6) has a slot (8) for receiving the wire (5) to be cut, and an anvil (9) arranged at the outcrop of the receiving slot (8) so that the device (1) is able to cut the wire (5) positioned in the slot (8) and resting against the anvil (9) by pivoting the blade (4) around the lug (7) inserted in the pivoting orifice (10) until the counter-cutting edge (11) of the blade (4) bears against the anvil (9) and cutting said wire (5) by pinching.

Description

FIELD OF THE INVENTION The present invention relates to the technical sector of cutlery instruments and in particular to the technical sector of bayonets for example. The invention more particularly relates to a wire cutter device comprising a knife or a bayonet. The invention finds an advantageous application in the field of knives 10 of the type called "outdoor" (in English terminology), survival knives and tactical knives. PRIOR ART It is known from International Patent Application No. WO 96/21541 a wire cutter device of the type comprising: - a knife comprising a blade comprising a cutting edge, a counter-cutting edge, and a pivoting orifice; - A cutting tool comprising a base from which extends a lug adapted to engage in the pivot hole of the blade. The lug comprises in particular a longitudinal section in the form of "T" so as to form a locking head adapted to cooperate with the pivot hole of the blade which comprises an oblong shape. The wire cutter tool further includes an opening 25 for receiving the wire to be cut. Thus, to cut the wire, it is inserted into the opening of the cutting tool, and the lug is inserted into the pivot hole of the blade. The pivoting of the blade causes shearing of the wire between the cutting tool and the blade of the knife.

The first operations of cutting wire are optimal since the "T" -shaped pin prevents the lifting of the blade during its pivoting. Of course, the length of the lug below the T-shaped head must be perfectly adjusted to the thickness of the blade, which makes it more difficult to design and therefore increases its cost price. Under these conditions, the shearing of the wire is perfectly realized. However, after a multitude of cuts, a game begins to be felt between the cutting tool and the blade when the lug is engaged in the pivot hole of the blade, making cutting operations difficult or impossible. . The wire is no longer cut but folded. Another disadvantage is the size of the pivoting hole which is oblong in shape to allow the head of the pin to move into a position, and after pivoting, prevent its withdrawal to perform the cutting operation as such. Indeed, the size of this pivoting orifice tends to weaken the blade. Thus, in order not to weaken the blade too much, the designers of this kind of knives were made to thicken the blade, especially at the counter-cutting edge to strengthen the blade, to the detriment of the effectiveness of the knife, particularly in terms of penetration. In addition, it is obvious that these types of lug and pivoting orifice are difficult to cooperate, especially in an action situation. The insertion of the pin into the blade must be precise, only one insertion position is possible, and even more disadvantageously, when said pin is inserted and the blade is rotated, there is only a single position allowing the removal of the blade. It is obvious that the drawbacks that emerge from such a design are numerous, especially in terms of security when the user of the knife is attacked for example and must respond quickly. Indeed, if the blade is engaged in the pivot hole, it is very difficult for the user to quickly remove it to fight back. Finally, in hostile conditions of use, for example in the mud, it becomes very difficult for the user to pivot the blade after insertion of the pin in the pivoting hole when mud is housed between the cutting tool and the blade, preventing it from pivoting because the adjustment between the blade and the lug is tight and that any presence of mud or soil between the blade and the lug prevents said blade from passing under the head of said lug.

SUMMARY OF THE INVENTION It is therefore an object of the invention to overcome the aforementioned drawbacks and thus to propose a wire cutter device having optimum efficiency. Another object of the invention is to provide such a wire cutter device whose knife blade is not weakened, and which has optimal penetration performance.

Another object of the invention is to provide such a device which is simple, easy and fast to use, which presents no risk for its user. To solve the aforementioned problems, it has thus been developed a wire cutter device according to the state of the art in that it comprises: a knife comprising a blade comprising a cutting edge, a counter-cutting edge, and a pivot port; - A cutting tool comprising a base from which extends a lug adapted to engage in the orifice of the blade.

According to the invention, the lug of the base of the cutting tool is cylindrical so that its insertion into the pivot hole of the blade and its removal, are easy and fast. The cylindrical lug implies that the swivel hole can be circular and of small diameter so that the blade resistance is not decreased, nor the penetration performance since the counter-cutting edge can be refined without weakening the blade. . In addition, the base has a slot for receiving the wire to be cut, and an anvil arranged at the outcrop of the slot so that the device is able to cut the wire positioned in the slot and bearing against the An anvil, by pivoting the blade around the lug inserted in the pivoting hole until the counter-cutting edge of the blade bears against the anvil and cuts said wire by pinching. In this way, the wire is cut by simply pivoting the blade. No close fit is required between the blade and the lug, and the cooperation between the blade and the lug is not impeded by the conditions of use, such as the presence of mud or soil, for example. The wire is cut by the blade in abutment against the anvil, pinching or crushing in the manner of a cutting plier and no longer according to the principle of shearing. In addition, the cut is made with the counter-cutting edge of the blade and thus causes no damage to the blade of the knife. The cutting movement is effected by moving the knife handle away from the cutting tool, which reduces the risk for the user to pinch his fingers for example. The use is simple, easy and safe. Another advantage lies in the fact that the arrangement of a receiving slot of the wire to be cut, in combination with the fact that said wire is cut by the counter-cutting edge of the blade causes an ease of use of the device which can in particular be easily engaged in a restricted place to cut said wire, and ease of engagement of the wire to be cut. According to a particular embodiment, the anvil has a curved bearing surface which makes it possible to adapt to the different diameters of wire to be cut and which also makes it more resistant to wear. Advantageously, the anvil is removable to allow to change when it is worn.

According to a particular embodiment, the cutting tool comprises means for fixing it on a sheath of the knife. BRIEF DESCRIPTION OF THE DRAWINGS Other characteristics and advantages of the invention will emerge clearly from the description which is given below, by way of indication and in no way limiting, with reference to the appended figures, in which: FIG. diagrammatic representation in perspective illustrating the cutting tool of the wire cutter device according to the invention; FIG. 2 is a diagrammatic perspective view illustrating the wire cutter device according to the invention, in use for cutting barbed wire; - Figure 3 is a schematic perspective view illustrating the cutting tool of the wire cutter device according to the invention, arranged at the end of a knife sheath. DETAILED DESCRIPTION OF THE INVENTION The invention relates to a wire cutter device (1) comprising a cutting tool (2) and a knife (3) having a blade (4) for the wire cutting operation. (5) as such.

With reference to FIG. 1, the cutting tool (2) is in the form of a part forming a base (6) from which extends a cylindrical lug (7). The base (6) has a slot (8) for receiving the wire (5) to be cut, and an anvil (9) arranged flush with the slot (8). The anvil (9) is in the form of a metal piece, removable, screwed on the base (6) and providing a support surface for the wire (5), 20 and against-support for the blade (4) during the cutting operation as such of the wire (5). The knife (3) has, meanwhile, a pivot hole (10) formed in the thickness of the blade (4). The orifice (10) is circular and comprises a diameter adapted to receive the pin (7) of the cutting tool (2) in an insertion position, and to permit easy pivoting of the blade (4) around said pin ( 7). The lug (7) can be removed and easily inserted into the pivot hole (10). There is no blocking position. The orifice (10) allows only the pivoting of the blade (4) around the lug (7). It can then be of small dimension so that it does not weaken the blade (4). Said blade (4) can be designed with a counter-cutting edge (11) refined allowing it to have good performance at penetration. Thus, to perform a cutting operation of a wire (5) and with reference to FIG. 2, the wire (5) is positioned in the slot (8) bearing against the anvil (9) , and the blade (4) 3033277 6 is pivoted about the lug (7) inserted in the pivoting hole (10) of said blade (4), until the counter-cutting edge (11) of the blade (4) bears against the anvil (9) and cuts off said wire (5) by pinching.

The surface of the anvil (9) against which the wire (5) abuts is curved to allow better adaptation to the different diameters of wire (5) and to better withstand the wear of the wire. anvil (9) following the cutting operations. According to the embodiment illustrated in the figures, and in particular in FIG. 3, the cutting tool (2) comprises means for fixing it on a sheath (12) of the knife (3). More specifically, the base (6) of the cutting tool (2) comprises at least two orifices (12), each adapted to receive a fastening nut (13) to said sleeve (12). It is obvious that said base (6) can be fixed to the sheath (12) in any appropriate manner without departing from the scope of the invention.

It goes without saying that the invention is not limited to the embodiment described above by way of example but that it extends to all the embodiments covered by the appended claims.

Claims (4)

REVENDICATIONS1. A wire cutter (1) comprising: - a knife (3) comprising a blade (4) comprising a cutting edge, a counter-cutting edge (11), and a pivoting orifice (10); - a cutting tool (2) comprising a base (6) from which extends a pin (7) adapted to engage in the pivot hole (10) of the blade (4), characterized in that - the lug (7) is cylindrical; the base (6) has a slot (8) for receiving the wire (5) to be cut, and an anvil (9) arranged flush with the receiving slot (8) so that the device (1) ) is able to cut the wire (5) positioned in the slot (8) and resting against the anvil (9), by pivoting the blade (4) around the pin (7) inserted into the pivoting orifice (10) until the counter-cutting edge (11) of the blade (4) bears against the anvil (9) and cuts off said wire (5) by pinching. 2. Device (1) according to claim 1, characterized in that the anvil (9) has a curved bearing surface. 3. Device (1) according to claim 1, characterized in that the anvil (9) is removable. 4. Device (1) according to claim 1, characterized in that the cutting tool (2) comprises means (12, 13) for attachment to a sleeve (12) of the knife (3) .25