EP0827815A1 - Pliers for cutting transversely plastic tubes - Google Patents

Pliers for cutting transversely plastic tubes Download PDF

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Publication number
EP0827815A1
EP0827815A1 EP97440077A EP97440077A EP0827815A1 EP 0827815 A1 EP0827815 A1 EP 0827815A1 EP 97440077 A EP97440077 A EP 97440077A EP 97440077 A EP97440077 A EP 97440077A EP 0827815 A1 EP0827815 A1 EP 0827815A1
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EP
European Patent Office
Prior art keywords
tube
blade
cutting
axis
angle
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.)
Ceased
Application number
EP97440077A
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German (de)
French (fr)
Inventor
Claude Aubriot
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Virax SA
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Virax SA
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Publication date
Application filed by Virax SA filed Critical Virax SA
Publication of EP0827815A1 publication Critical patent/EP0827815A1/en
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B26D3/169—Hand held tube cutters

Definitions

  • the present invention relates to a device of pipe cutter pliers to cut a tube transversely plastic material.
  • tube cutter clamp devices both comprise articulated branches, one to the other around a transverse axis, one of which includes its end a cutting blade, while the end of the other comprises a seat intended to receive the tube with cut.
  • a pipe cutter has a blade with a straight edge, which presents the disadvantage of requiring significant effort at the start cutting, indeed the cutting edge attacks the tube tangentially and the tube tends to slightly flatten, so that the contact area between the sharp and the tube is a line, making the primer of difficult cutting, with risk of crushing the tube and therefore deformation of it.
  • tube cutters allowing to make a so-called “pulling” or “pulling” cut, that is to say that instead of placing the pivot axis near the line coinciding with the cutting edge, said axis is distant, so that with the classic cut is associated a translational movement of the cutting edge on the object to be cut.
  • a tube cutter clamp device which comprises a blade with two cutting edges making an angle between them 70 ° and 100 °, preferably 85 °, the closest cutting edge of the pivot axis at an angle to the horizontal between 20 ° and 60 °, preferably 55 °, while the other cutting edge makes an angle with the horizontal included between 20 ° and 60 °, preferably 40 °.
  • the object of the present invention is to remedy these various drawbacks by proposing a clamp device pipe cutter whose use is easier than that of existing devices, since they do not require any effort important whether at the beginning or at the end of the cut.
  • the tube cutter clamp object of the present invention comprises two branches articulated in pivot to each other around a transverse axis, of which one has a cutting blade at its end, while that the end of the other has a hollow seat intended to receive the tube to be cut, and it is characterized essentially in that said blade has two cutting edges forming a projecting obtuse angle between them between 120 ° and 150 °, and so that the angle formed by the cutting edge farthest from said axis and a straight line passing by the tip of said blade and said axis is larger that that formed by the other cutting edge and said straight line; and in that said tip describes, during its pivoting, a arc of circle which cuts the line segment which joins said pivot axis and the center of the larger tube diameter likely to rest in said seat, so that the initiation of the cut is made by said point and that the end of cut is carried out only by the cutting edge farthest from said pivot axis.
  • edges of the blade make an angle of 135 °.
  • the circular arc that describes the point of the blade cuts the line segment joining the axis pivot in the center of the larger diameter tube likely to rest in the seat, at a point in the middle region of the radius of said tube.
  • the angle formed by the cutting edge farthest from the pivot axis and the straight line passing by the point of the blade and said axis is double that of formed by the other cutting edge and said straight line.
  • the tube cutter device is designed to optimally cut a tube with a diameter which corresponds to that of the headquarters.
  • it allows cut tubes of smaller diameter, even those with diameter is too small to allow cutting to begin blade tip means, in fact, in this case the ratio tube diameter / thickness is small, and the cutting edge further from the pivot axis then suffices for the achieving a perfect cut without significant effort, as much as said cutting is carried out "by pulling".
  • said seat has on its edge the most away from the pivot axis a notch where can come wedge said tube.
  • an existing pipe cutter clamp including a seat 1 intended to receive a tube 2 to be cut, and a blade 10 which has a straight edge 11.
  • FIG. 2a we can see another tube cutter clamp device existing, which includes a blade 12 comprising two cutting edges 13 and 14 forming an obtuse angle between them protruding, which allows to attack the tube 2 by a point 15, as can be seen in FIG. 2a, thus avoiding the risk of tube 2 being crushed, and limiting the effort to provide.
  • a tube cutter device it has two branches 3 and 4 pivotally mounted on a axis 5, the branch 3 has at one end a seat 30 in shape of an arc of a circle, while branch 4 comprises its end opposite the seat 30, a cutting blade 40.
  • seat 30 can also be V-shaped
  • the blade 40 has two cutting edges 41 and 42 making an angle of 135 ° between them, creating a point 43, which describes, during the pivoting, an arc of a circle A intersecting at a point B the line segment D joining the axis pivot 5 and the center C of circle E which corresponds to the larger diameter tube likely to rest in the seat 30.
  • the length of the segment CB can be understood between the ratios R / 5 and R / 1.25, where R is the radius of the circle E, the optimum value being R / 2.25.
  • the angle formed by the cutting edge 41 and a straight line F passing through the axis 5 and the point 43 is more large than the angle ß formed by the cutting edge 42 and the right F.
  • the angles a and ß are 30 ° and 15 ° respectively.
  • the blade 40 attacks the tube 2 by its point 43, the initiation of the cut can thus be carried out effortlessly and without deformation of the tube 2.
  • the cutting edges 41 and 42 cut the wall 20 of the tube 2 in the thickness direction which corresponds to the minimum effort required.
  • the cutting edge 42 has passed through the tube 2 and the cutting edge 41 completes the cutting of the tube 2 tangentially without risk of deformation and without effort like a classic single-edged blade, benefiting from more of the "pulling" effect, due to the value of the angle at.
  • the seat 30 has a notch 31 allowing the setting a small diameter tube, the cut of which will be made only by cutting edge 41.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Scissors And Nippers (AREA)

Abstract

The cutting pliers comprises two branches (3,4) pivoted to each other about a transverse spindle (5). One branch has a cutting blade (40) at its end and the other branch end has a hollow seat (30) for receiving the tube. The blade has two cutting edges (41,42) forming an obtuse angle of between 120<o> and 150<o>. This is such that the angle ( alpha ) between the cutting edge (41) furthest from the spindle and a straight line (F) passing through a point (43) in the blade and the spindle, is greater than the angle ( beta ) formed by the other cutting edge and the line. The point describes during pivoting a circular arc (A) which cuts the line segment (D) joining the spindle and the tube centre (C) of larger diameter resting in the seat. The start of the cut is made by the point and the end of the cut is made only by the cutting edge (41) furthest from the pivoting spindle.

Description

La présente invention a pour objet un dispositif de pince coupe-tube pour couper transversalement un tube en matière plastique.The present invention relates to a device of pipe cutter pliers to cut a tube transversely plastic material.

On connaít déjà des dispositifs de pince coupe-tube, ils comprennent tous deux branches articulées l'une à l'autre autour d'un axe transversal, dont l'une comporte à son extrémité une lame de coupe, tandis que l'extrémité de l'autre comporte un siège destiné à recevoir le tube à couper.We already know tube cutter clamp devices, they both comprise articulated branches, one to the other around a transverse axis, one of which includes its end a cutting blade, while the end of the other comprises a seat intended to receive the tube with cut.

En général, un dispositif de coupe-tube comporte une lame dont le tranchant est rectiligne, ce qui présente l'inconvénient de nécessiter un effort important à l'amorce de la coupe, en effet le tranchant attaque le tube tangentiellement et le tube a tendance à légèrement s'aplatir, en sorte que la zone de contact entre le tranchant et le tube est une ligne, ce qui rend l'amorce de la coupe difficile, avec risque d'écrasement du tube et donc de déformation de celui-ci.In general, a pipe cutter has a blade with a straight edge, which presents the disadvantage of requiring significant effort at the start cutting, indeed the cutting edge attacks the tube tangentially and the tube tends to slightly flatten, so that the contact area between the sharp and the tube is a line, making the primer of difficult cutting, with risk of crushing the tube and therefore deformation of it.

Cet inconvénient se manifeste plus particulièrement lorsque les tubes sont d'un grand diamètre, et plus exactement lorsque le rapport diamètre/épaisseur du tube est grand, puisque le tube est alors d'une moins grande rigidité.This disadvantage manifests itself more especially when the tubes are of a large diameter, and more precisely when the diameter / thickness ratio of the tube is large, since the tube is then less rigidity.

Pour pallier partiellement cet inconvénient, certains ont proposé des dispositifs coupe-tube permettant de réaliser une coupe dite "tirante" ou "en tirant, c'est-à-dire qu'au lieu de placer l'axe de pivotement à proximité de la ligne coïncidant avec le tranchant, ledit axe en est éloigné, en sorte qu'à la coupe classique est associé un mouvement de translation du tranchant sur l'objet à couper.To partially overcome this drawback, some have proposed tube cutters allowing to make a so-called "pulling" or "pulling" cut, that is to say that instead of placing the pivot axis near the line coinciding with the cutting edge, said axis is distant, so that with the classic cut is associated a translational movement of the cutting edge on the object to be cut.

D'autres ont proposé des dispositifs de pince coupe-tube comportant, comme les coupe-tubes du type guillotine, une lame à deux tranchants faisant un angle obtus saillant et comportant une pointe qui permet d'amorcer la coupe avec peu d'effort, et d'éviter l'écrasement du tube, par contre, en fin de coupe les deux tranchants attaquent simultanément et tangentiellement la paroi interne du tube, ce qui nécessite un effort important.Others have proposed clamp devices pipe cutter comprising, like pipe cutters of the type guillotine, a two-edged blade at an angle obtuse projecting and having a point which makes it possible to initiate cut with little effort, and avoid crushing the tube, on the other hand, at the end of cutting the two cutting edges attack the inner wall simultaneously and tangentially of the tube, which requires significant effort.

Il serait toutefois possible de remédier à cet inconvénient en utilisant une lame dont les deux tranchants formeraient un angle aigu, mais cela nécessiterait une course importante de la lame, donc un écartement important des branches de l'outil, ce qui ne faciliterait pas son utilisation.However, it would be possible to remedy this disadvantage of using a blade with two cutting edges would form an acute angle, but this would require a large blade stroke, therefore a large distance branches of the tool, which would not facilitate its use.

On connaít également, par le document CA-A-1 178 426, un dispositif de pince coupe tube qui comporte une lame à deux tranchants faisant entre-eux un angle compris entre 70° et 100°, de préférence 85°, le tranchant le plus proche de l'axe de pivotement faisant un angle avec l'horizontale compris entre 20° et 60°, de préférence de 55°, tandis que l'autre tranchant fait avec l'horizontale un angle compris entre 20° et 60°, de préférence de 40°.We also know, from document CA-A-1 178 426, a tube cutter clamp device which comprises a blade with two cutting edges making an angle between them 70 ° and 100 °, preferably 85 °, the closest cutting edge of the pivot axis at an angle to the horizontal between 20 ° and 60 °, preferably 55 °, while the other cutting edge makes an angle with the horizontal included between 20 ° and 60 °, preferably 40 °.

Si ce dispositif permet la réalisation d'une coupe plus efficace que les autres dispositifs existants, il n'en présente pas moins plusieurs inconvénients, d'une part l'angle que font les tranchants nécessite une grande ouverture des branches, ce qui requiert une force importante à l'amorce de la coupe et limite la capacité de coupe, et d'autre part, en fin de coupe, malgré le décalage angulaire des tranchants par rapport à l'horizontale, il subsiste une phase où lesdits tranchants attaquent la paroi du tube par l'intérieure de manière simultanée et tangentielle, avec pour conséquence la nécessité d'un effort important.If this device allows the realization of a more efficient cutting than other existing devices, it nevertheless has several drawbacks, on the one hand the angle made by the cutting edges requires a large branch opening, which requires significant force at the start of the cut and limits the cutting capacity, and on the other hand, at the end of the cut, despite the angular offset cutting edges with respect to the horizontal, there remains a phase where said cutting edges attack the wall of the tube by the interior simultaneously and tangentially, with consequently the need for a significant effort.

La présente invention a pour but de remédier à ces divers inconvénients en proposant un dispositif de pince coupe-tube dont l'utilisation est plus aisée que celle des dispositifs existants, puisque ne nécessitant pas d'effort important que ce soit en début ou en fin de coupe.The object of the present invention is to remedy these various drawbacks by proposing a clamp device pipe cutter whose use is easier than that of existing devices, since they do not require any effort important whether at the beginning or at the end of the cut.

Le dispositif de pince coupe-tube objet de la présente invention comprend deux branches articulées en pivotement l'une à l'autre autour d'un axe transversal, dont l'une est munie à son extrémité d'une lame de coupe, tandis que l'extrémité de l'autre comporte un siège en creux destiné à recevoir le tube à couper, et il se caractérise essentiellement en ce que ladite lame comporte deux tranchants faisant entre eux un angle obtus saillant compris entre 120° et 150°, et de manière que l'angle formé par le tranchant le plus éloigné dudit axe et une droite passant par la pointe de ladite lame et ledit axe soit plus grand que celui formé par l'autre tranchant et ladite droite; et en ce que ladite pointe décrit, lors de son pivotement, un arc de cercle qui coupe le segment de droite qui joint ledit axe de pivotement et le centre du tube de plus grand diamètre susceptible de reposer dans ledit siège, en sorte que l'amorce de la coupe soit réalisée par ladite pointe et que la fin de coupe soit réalisée uniquement par le tranchant le plus éloigné dudit axe de pivotement.The tube cutter clamp object of the present invention comprises two branches articulated in pivot to each other around a transverse axis, of which one has a cutting blade at its end, while that the end of the other has a hollow seat intended to receive the tube to be cut, and it is characterized essentially in that said blade has two cutting edges forming a projecting obtuse angle between them between 120 ° and 150 °, and so that the angle formed by the cutting edge farthest from said axis and a straight line passing by the tip of said blade and said axis is larger that that formed by the other cutting edge and said straight line; and in that said tip describes, during its pivoting, a arc of circle which cuts the line segment which joins said pivot axis and the center of the larger tube diameter likely to rest in said seat, so that the initiation of the cut is made by said point and that the end of cut is carried out only by the cutting edge farthest from said pivot axis.

Selon une caractéristique additionnelle du dispositif selon l'invention les tranchants de la lame font un angle de 135°.According to an additional characteristic of the device according to the invention the edges of the blade make an angle of 135 °.

Selon une autre caractéristique additionnelle du dispositif selon l'invention, l'arc de cercle que décrit la pointe de la lame coupe le segment de droite joignant l'axe de pivotement au centre du tube de plus grand diamètre susceptible de reposer dans le siège, en un point situé dans la région médiane du rayon dudit tube.According to another additional characteristic of the device according to the invention, the circular arc that describes the point of the blade cuts the line segment joining the axis pivot in the center of the larger diameter tube likely to rest in the seat, at a point in the middle region of the radius of said tube.

Selon une autre caractéristique additionnelle du dispositif selon l'invention l'angle formé par le tranchant le plus éloigné de l'axe de pivotement et la droite passant par la pointe de la lame et ledit axe est double de celui formé par l'autre tranchant et ladite droite.According to another additional characteristic of the device according to the invention the angle formed by the cutting edge farthest from the pivot axis and the straight line passing by the point of the blade and said axis is double that of formed by the other cutting edge and said straight line.

Le dispositif de coupe-tube selon l'invention est conçu pour couper de façon optimum un tube d'un diamètre qui correspond à celui du siège. Il permet toutefois de couper les tubes d'un diamètre inférieur, même ceux dont le diamètre est trop petit pour permettre d'amorcer la coupe au moyen de la pointe de lame, en effet, dans ce cas le rapport diamètre/épaisseur du tube est faible, et le tranchant le plus éloigné de l'axe de pivotement suffit alors à la réalisation d'une coupe parfaite sans effort important, d'autant que ladite coupe s'effectue "en tirant".The tube cutter device according to the invention is designed to optimally cut a tube with a diameter which corresponds to that of the headquarters. However, it allows cut tubes of smaller diameter, even those with diameter is too small to allow cutting to begin blade tip means, in fact, in this case the ratio tube diameter / thickness is small, and the cutting edge further from the pivot axis then suffices for the achieving a perfect cut without significant effort, as much as said cutting is carried out "by pulling".

De plus, pour permettre le calage d'un tube de très petit diamètre, afin qu'il n'échappe pas du siège lors de la coupe, ledit siège comporte sur son bord le plus éloigné de l'axe de pivotement une échancrure où peut venir se caler ledit tube.In addition, to allow the setting of a tube of very small diameter, so that it does not escape from the seat when of the section, said seat has on its edge the most away from the pivot axis a notch where can come wedge said tube.

De plus encore, l'effet de coupe "en tirant" à tendance à ramener le tube vers le fond du siège.Furthermore, the cutting effect "pulling" at tendency to bring the tube towards the bottom of the seat.

Les avantages et les caractéristiques de la présente invention ressortiront plus clairement de la description qui suit et qui se rapporte au dessin annexé, lequel en représente un mode de réalisation non limitatif.The advantages and features of the present invention will emerge more clearly from the description which follows and which relates to the appended drawing, which represents a non-limiting embodiment thereof.

Dans le dessin annexé :

  • les figures 1a et 1b représentent des vues schématiques partielles d'un dispositif de pince coupe-tube existant, lors de deux étapes d'une coupe.
  • les figures 2a et 2b représentent des vues schématiques partielles d'un autre dispositif de pince coupe-tube existant, lors de deux étapes d'une coupe.
  • la figure 3 représente une vue en plan d'un dispositif de pince coupe-tube selon l'invention.
  • les figures 4a, 4b, 4c et 4d représente des vues schématiques du même dispositif, lors de différentes étapes de fonctionnement.
In the attached drawing:
  • Figures 1a and 1b show partial schematic views of an existing tube cutter clamp device, during two stages of a cut.
  • Figures 2a and 2b show partial schematic views of another existing tube cutter clamp device, during two stages of a cut.
  • FIG. 3 represents a plan view of a tube cutter clamp device according to the invention.
  • Figures 4a, 4b, 4c and 4d show schematic views of the same device, during different stages of operation.

Si on se réfère aux figures 1a et 1b on peut voir un dispositif de pince coupe-tube existant, comprenant un siège 1 destiné à recevoir un tube 2 à couper, et une lame 10 qui comporte un tranchant rectiligne 11.If we refer to Figures 1a and 1b we can see an existing pipe cutter clamp, including a seat 1 intended to receive a tube 2 to be cut, and a blade 10 which has a straight edge 11.

Sur la figure la on peut voir qu'à l'amorce de la coupe, le tranchant 11 attaque le tube 2 tangentiellement ce qui nécessite un effort important, d'autant que le tube 2 à tendance à s'écraser.On the figure we can see that at the beginning of cutting, cutting edge 11 attacks tube 2 tangentially which requires significant effort, especially as the tube 2 tends to crash.

Sur la figure 1b on peut voir qu'en fin de coupe il n'y a pas de risque d'écrasement puisque la partie du tube 2 restant à couper est au contact du siège 1, par contre la ligne de coupe reste importante.In Figure 1b we can see that at the end of the cut there is no risk of crushing since the part of the tube 2 remaining to be cut is in contact with seat 1, by against the cutting line remains important.

Si on se réfère maintenant aux figures 2a et 2b on peut voir un autre dispositif de pince coupe-tube existant, qui comprend une lame 12 comportant deux tranchants 13 et 14 faisant entre eux un angle obtus saillant, ce qui permet d'attaquer le tube 2 par une pointe 15, comme cela est visible sur la figure 2a, évitant ainsi le risque d'écrasement du tube 2, et limitant l'effort à fournir.If we now refer to Figures 2a and 2b we can see another tube cutter clamp device existing, which includes a blade 12 comprising two cutting edges 13 and 14 forming an obtuse angle between them protruding, which allows to attack the tube 2 by a point 15, as can be seen in FIG. 2a, thus avoiding the risk of tube 2 being crushed, and limiting the effort to provide.

Par contre, comme cela est représenté sur la figure 2b, la fin de coupe nécessite un effort important du fait que les tranchants 13 et 14 attaquent tangentiellement la paroi interne du tube 2 simultanément selon deux lignes.However, as shown in the Figure 2b, the end of cut requires a significant effort from causes the cutting edges 13 and 14 to attack tangentially the internal wall of the tube 2 simultaneously along two lines.

Si on se réfère maintenant à la figure 3 on peut voir un dispositif de coupe-tube selon l'invention, il comporte deux branches 3 et 4 montées en pivotement sur un axe 5, la branche 3 comporte à une extrémité un siège 30 en forme d'arc de cercle, tandis que la branche 4 comporte à son extrémité en regard du siège 30, une lame de coupe 40.If we now refer to Figure 3 we can see a tube cutter device according to the invention, it has two branches 3 and 4 pivotally mounted on a axis 5, the branch 3 has at one end a seat 30 in shape of an arc of a circle, while branch 4 comprises its end opposite the seat 30, a cutting blade 40.

Il est à noter que le siège 30 peut également être en forme de V.It should be noted that seat 30 can also be V-shaped

La lame 40 comporte deux tranchants 41 et 42 faisant entre eux un angle de 135°, créant une pointe 43, laquelle décrit, lors du pivotement, un arc de cercle A coupant en un point B le segment de droite D joignant l'axe de pivotement 5 et le centre C du cercle E qui correspond au tube de plus grand diamètre susceptible de reposer dans le siège 30.The blade 40 has two cutting edges 41 and 42 making an angle of 135 ° between them, creating a point 43, which describes, during the pivoting, an arc of a circle A intersecting at a point B the line segment D joining the axis pivot 5 and the center C of circle E which corresponds to the larger diameter tube likely to rest in the seat 30.

La longueur du segment CB peut être comprise entre les rapports R/5 et R/1,25 , où R est le rayon du cercle E, la valeur optimum étant R/2,25.The length of the segment CB can be understood between the ratios R / 5 and R / 1.25, where R is the radius of the circle E, the optimum value being R / 2.25.

De plus, l'angle a formé par le tranchant 41 et une droite F passant par l'axe 5 et la pointe 43, est plus grand que l'angle ß formé par le tranchant 42 et la droite F. Dans le mode de réalisation représenté, les angles a et ß sont respectivement de 30° et 15°.In addition, the angle formed by the cutting edge 41 and a straight line F passing through the axis 5 and the point 43, is more large than the angle ß formed by the cutting edge 42 and the right F. In the embodiment shown, the angles a and ß are 30 ° and 15 ° respectively.

Si on se réfère maintenant aux figures 4a, 4b, 4c et 4d, on peut voir différentes étapes de la coupe d'un tube 2.If we now refer to Figures 4a, 4b, 4c and 4d, we can see different stages of cutting a tube 2.

Sur la figure 4a, la lame 40 attaque le tube 2 par sa pointe 43, l'amorce de la coupe peut ainsi être réalisée sans effort et sans déformation du tube 2.In FIG. 4a, the blade 40 attacks the tube 2 by its point 43, the initiation of the cut can thus be carried out effortlessly and without deformation of the tube 2.

Sur les figures 4b et 4c, les tranchants 41 et 42 coupent la paroi 20 du tube 2 dans le sens de l'épaisseur ce qui correspond à l'effort minimum à fournir.In FIGS. 4b and 4c, the cutting edges 41 and 42 cut the wall 20 of the tube 2 in the thickness direction which corresponds to the minimum effort required.

Sur la figure 4d, le tranchant 42 a traversé le tube 2 et le tranchant 41 achève la coupe du tube 2 tangentiellement sans risque de déformation et sans effort comme une lame classique à un seul tranchant, bénéficiant de plus de l'effet "en tirant", du fait de la valeur de l'angle a.In FIG. 4d, the cutting edge 42 has passed through the tube 2 and the cutting edge 41 completes the cutting of the tube 2 tangentially without risk of deformation and without effort like a classic single-edged blade, benefiting from more of the "pulling" effect, due to the value of the angle at.

On peut voir également sur ces figures que le siège 30 comporte une échancrure 31 permettant le calage d'un tube de petit diamètre, dont la coupe sera réalisée uniquement par le tranchant 41.We can also see in these figures that the seat 30 has a notch 31 allowing the setting a small diameter tube, the cut of which will be made only by cutting edge 41.

Claims (7)

Dispositif de pince coupe-tube pour couper transversalement un tube en matière plastique, comprenant deux branches (3, 4) articulées en pivotement l'une à l'autre autour d'un axe transversal (5), dont l'une est munie à son extrémité d'une lame de coupe (40), tandis que l'extrémité de l'autre comporte un siège en creux (30) destiné à recevoir le tube (2) à couper, caractérisé en ce que ladite lame (40) comporte deux tranchants (41, 42) faisant entre eux un angle obtus saillant compris entre 120° et 150°, et de manière que l'angle (α) formé par le tranchant (41) le plus éloigné dudit axe (5) et une droite (F) passant par la pointe (43) de ladite lame (40) et ledit axe (5) soit plus grand que l'angle (ß) formé par l'autre tranchant (42) et ladite droite (F); et en ce que ladite pointe (43) décrit, lors du pivotement, un arc de cercle (A) qui coupe le segment de droite (D) qui joint ledit axe (5) et le centre (C) du tube de plus grand diamètre susceptible de reposer dans ledit siège (30), en sorte que l'amorce de la coupe soit réalisée par ladite pointe (43) et que la fin de coupe soit réalisée uniquement par le tranchant (41) le plus éloigné dudit axe de pivotement (5).Pipe cutter clamp device for cutting transversely a plastic tube, comprising two branches (3, 4) pivotally articulated one to the other around a transverse axis (5), one of which is provided at its end with a cutting blade (40), while the end of the other has a hollow seat (30) intended to receive the tube (2) to be cut, characterized in that said blade (40) has two cutting edges (41, 42) forming between them a projecting obtuse angle of between 120 ° and 150 °, and so that the angle (α) formed by the cutting edge (41) furthest from said axis (5) and a straight line (F) passing through the tip (43) of said blade (40) and said axis (5) is greater than the angle (ß) formed by the other cutting edge (42) and said straight line (F); and in that said point (43) describes, during pivoting, an arc of a circle (A) which cuts the line segment (D) which joins said axis (5) and the center (C) of the larger diameter tube likely to rest in said seat (30), so that the primer of the cut is made by said point (43) and that the end cutting is carried out only by the cutting edge (41) the further from said pivot axis (5). Dispositif selon la revendication 1 caractérisé en ce que les tranchants (41, 42) de la lame (40) font un angle de 135°.Device according to claim 1 characterized in that the cutting edges (41, 42) of the blade (40) make an angle of 135 °. Dispositif selon la revendication 1 ou la revendication 2 caractérisé en ce que l'arc de cercle (A) que décrit la pointe (43) de la lame (40) coupe le segment de droite (D) joignant l'axe de pivotement (5) au centre (C) du tube de plus grand diamètre susceptible de reposer dans le siège (30), en un point (B) situé dans la région médiane du rayon dudit tube.Device according to claim 1 or the claim 2 characterized in that the arc of a circle (A) as described by the point (43) of the blade (40) cuts the segment right (D) joining the pivot axis (5) to the center (C) larger diameter tube likely to rest in the seat (30), at a point (B) located in the middle region the radius of said tube. Dispositif selon la revendication 3 caractérisé en ce que la région médiane est bornée par les valeurs R/5 et R/1,25, R étant le rayon du tube de plus grand diamètre susceptible de reposer dans le siège (30).Device according to claim 3 characterized in that the middle region is bounded by the values R / 5 and R / 1.25, R being the radius of the tube plus large diameter capable of resting in the seat (30). Dispositif selon la revendication 4 caractérisé en ce que l'arc de cercle (A) que décrit la pointe (43) de la lame (40) coupe le segment de droite (D) joignant l'axe de pivotement (5) au centre (C) du tube de plus grand diamètre susceptible de reposer dans le siège (30), en un point (B) situé à une distance de R/2,25 dudit centre (C).Device according to claim 4 characterized in that the arc of a circle (A) that describes the tip (43) of the blade (40) intersects the line segment (D) joining the pivot pin (5) to the center (C) of the larger diameter likely to rest in the seat (30), at a point (B) located at a distance of R / 2.25 from said center (C). Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que l'angle (a) formé par le tranchant (41) le plus éloigné de l'axe de pivotement (5) et la droite (F) passant par la pointe (43) de la lame (40) et ledit axe (5) est double de l'angle (ß) formé par l'autre tranchant (42) et ladite droite (F).Device according to any one of previous claims characterized in that the angle (a) formed by the cutting edge (41) furthest from the axis of pivot (5) and the right (F) passing through the point (43) of the blade (40) and said axis (5) is double the angle (ß) formed by the other cutting edge (42) and said straight line (F). Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que le siège (1) comporte dans son bord le plus éloigné de l'axe de pivotement (5), une échancrure (31) permettant le calage d'un tube de petit diamètre.Device according to any one of previous claims characterized in that the seat (1) has in its edge furthest from the axis of pivoting (5), a notch (31) allowing the setting of a small diameter tube.
EP97440077A 1996-09-10 1997-09-08 Pliers for cutting transversely plastic tubes Ceased EP0827815A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9611164 1996-09-10
FR9611164A FR2753120B1 (en) 1996-09-10 1996-09-10 TUBE CUTTER CLIP DEVICE FOR CROSS-CUTTING A PLASTIC TUBE

Publications (1)

Publication Number Publication Date
EP0827815A1 true EP0827815A1 (en) 1998-03-11

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ID=9495700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97440077A Ceased EP0827815A1 (en) 1996-09-10 1997-09-08 Pliers for cutting transversely plastic tubes

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US (1) US6513245B1 (en)
EP (1) EP0827815A1 (en)
JP (1) JPH10137460A (en)
CA (1) CA2213789C (en)
FR (1) FR2753120B1 (en)

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Also Published As

Publication number Publication date
FR2753120A1 (en) 1998-03-13
JPH10137460A (en) 1998-05-26
CA2213789C (en) 2008-02-26
CA2213789A1 (en) 1998-03-10
FR2753120B1 (en) 1998-12-11
US6513245B1 (en) 2003-02-04

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