WO2012032204A1 - Adjustable self-locking pliers - Google Patents

Adjustable self-locking pliers Download PDF

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Publication number
WO2012032204A1
WO2012032204A1 PCT/ES2011/070612 ES2011070612W WO2012032204A1 WO 2012032204 A1 WO2012032204 A1 WO 2012032204A1 ES 2011070612 W ES2011070612 W ES 2011070612W WO 2012032204 A1 WO2012032204 A1 WO 2012032204A1
Authority
WO
WIPO (PCT)
Prior art keywords
adjustable
tenaza
autoblocant
spindle
fixed handle
Prior art date
Application number
PCT/ES2011/070612
Other languages
Spanish (es)
French (fr)
Inventor
José Antonio IRIONDO GAZTAÑAGA
Gudiker Alberdi Arrieta
Original Assignee
Grip-On Tools, S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Grip-On Tools, S.A. filed Critical Grip-On Tools, S.A.
Priority to EP11823109.1A priority Critical patent/EP2614924A1/en
Publication of WO2012032204A1 publication Critical patent/WO2012032204A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
    • B25B7/123—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears with self-locking toggle levers

Definitions

  • the present invention refers to an adjustable self-locking pliers whose structural and ergonomic characteristics facilitate the user to handle it and regulate its opening, reducing the efforts to be applied in said regulation. and providing a protection of the spindle threads against blows or welding projections.
  • the adjustable tongs work in such a way that they tighten different thicknesses of objects by varying the geometry of the positions of points A - B - C - D, joints that constitute the kinematic chain of the system.
  • these articulation points form an articulated quadrilateral so that the sides of said quadrilateral comprise:
  • the quadrilateral is transformed into a triangle by putting three of its B-C-D articulation points in line.
  • the adjustment for different thicknesses of objects is obtained by varying the length of some of the sides of the quadrilateral, in this case by varying the DA side.
  • the connecting rod and the release cam support each other it is necessary to ensure the stability of the blockage by having the connecting rod and the release cam support each other, so that a centered articulation point is located inside of the line that encompasses that centered point of articulation and two other extreme points of articulation (angle formed between these three points greater than 180 °). To undo this block and obtain the open position it is necessary to pass this angle to an angle less than 180 ° using the lever of the cam.
  • Another known form of regulation consists in turning a nut located in the central area of the fixed handle, whose axial displacement is immobilized by the handle itself, said nut displacing a spindle whose rotation is immobilized with the connecting rod connected.
  • a system is protected to convert the adjustable pliers into a pliers, said system is based on a mobile slide located on the fixed handle and a pointed screw protruding from the release cam, so that in the position of The operating slide as pliers the screw stops with it avoiding the blockage.
  • the adjustable pliers have a spring between the fixed jaw or the fixed grip and the movable jaw, which helps to open said pliers when unlocked, exerting its maximum traction when the clamp is adjusted for a minimum thickness with the disadvantage that the force The spring is reduced by increasing the thickness of the workpiece, reaching if the thickness is maximum if there is no force.
  • WO 9937445 which has an integral screw, a spring anchored to a fixed point, a carriage encapsulated in the fixed handle by means of bent tabs at the ends of the wings of said handle and with an unbreakable joint of the connecting rod in coaxial position with the spindle.
  • the invention proposes an adjustable self-locking pliers that have a fixed handle, to which a fixed jaw joined in turn joined in turn with a movable jaw.
  • This movable jaw is articulated in the fixed handle, and at its other end with a movable handle, the movable handle being connected to the front end of a connecting rod that, at its rear end and through a transverse pin, connects and rests on a mechanism of regulation of the distance between the cogged teeth of both jaws.
  • the invention is characterized in that the adjustment mechanism comprises a spindle arranged along a longitudinal internal cavity of the fixed handle, while being axially retained in both directions, said spindle being linked with a guided carriage along said guide longitudinal interior cavity without rotational movement, linking with said carriage nuts the connecting rod at its rear end by means of a rear articulation pin.
  • the longitudinal interior cavity of the fixed handle comprises an arched vault-shaped bottom on which the curved convex upper part of the nut carriage is complementary.
  • the spindle supports an advanced portion thereof on the upper pin attached to the fixed handle, an advanced portion determined by a diametral narrowing.
  • Another feature of the invention is that the articulation between the connecting rod and the nut occurs, indistinctly in male-female or female-male configuration, in an offset transverse axis with respect to the longitudinal axis of the spindle unloading and distributing without any problem all the eccentric loads on the spindle itself and on a large surface at the bottom of the fixed handle.
  • the nut carriage incorporates an open lower support housing with a double or single seat, at the bottom of which the rear pin of the connecting rod is attached, being removable in the joint.
  • the spindle receives the longitudinal load through the nut, transmitting it to the fixed handle by means of a large diameter section in an area of maximum strength of its rear wall, therefore improving the given load distribution that in most existing models the load is received only by the narrow section tip of the spindle.
  • the pliers comprise a spring connected to two mobile elements, the movable jaw and the carriage nut, that move in the same direction which eliminates the problem of reduction of force for the opening of the jaws
  • the spindle is axially retained in an outward direction in a rear wall of the fixed handle, affected rear wall of a through hole through which a terminal section of such spindle appears outside, said spindle counting on a annular protrusion that abuts against the internal face of the aforementioned rear wall of the fixed handle as an axial retention means in the direction towards the outside of said spindle as referred to above and as a resistance support for stress relief.
  • Said annular projection can be replaced by a flat or elastic washer that picks up the spindle thrust and discharges it into the wall of the fixed handle, being able to serve as the case at the same time as an elastic spring mitigating the stiffness in the blockage.
  • the pincer is also characterized in that it comprises a doorknob coupled in the terminal section of the spindle, the knob having an axial hole where the said terminal section of the spindle is embedded.
  • the coupling between the terminal section of the spindle and the axial hole of the knob comprises such a relative anti-rotation means coupling between both elements determined by flat areas complemented with each other.
  • Another feature of the invention is that by decoupling said knob, the entire adjustment mechanism can be disassembled.
  • the invention incorporates an articulated converter to the release cam with a transverse pin that remains locked in two positions.
  • swinging by a simple turn with a finger until it rests on the contact area of the cam with the connecting rod and interposes between the support of both, thus preventing blockage in all adjustment positions allowing the tool to function as a pliers that remain ergonomic for the grip of large piece thicknesses, which is impossible with universal pliers.
  • unlocking cam always metallic in this type of pliers, attached to the mobile handle inside by the pressure of a spring, is made of plastic resistance material and has a small sheet of steel inserted hardened in the zone of contact with the connecting rod for greater specific resistance to compression and friction.
  • Another feature of the invention is that two linings have been arranged in plastic material covering the two handles so that they provide a better touch with greater comfort and in such a way that due to the dielectric characteristics of the linings, the knob and The unlocking cam can isolate the hand from a domestic voltage.
  • Figure 1 Shows a profile view of the self-locking adjustable pliers, object of the invention.
  • the pliers are in a closed position with zero thickness adjustment.
  • Figure 2. Shows a view of the profile section of the self-locking adjustable pliers of the invention.
  • Figure 3. Shows a view similar to the previous one in which the pliers are in the open position and in which the handles have been represented.
  • Figure 4.- Shows a sectional view corresponding to the G-G section of Figure 1.
  • FIG. 5 to 15.- It shows different perspective views of some features and parts that incorporates the pliers of the invention.
  • Figure 16. Comparison between the grip of a plier and a pliers with different thicknesses of pieces.
  • the self-locking adjustable pliers comprises a fixed handle 1, whose interior space serves as a guide system for a nut carriage 9, said guide system corresponding to the arc shape of the nut carriage 9 in its upper surface arched with the vault-shaped bottom that has the fixed handle inside.
  • the nut carriage 9 moves axially on a spindle 10 thanks to the guiding system, which prevents the rotation of the carriage nut 9 on the spindle 10, when it is turned by means of a knob 1 1.
  • This knob 1 1 is maintained in an invariable position with respect to the fixed handle 1, and is attached to the spindle 10, either by threading or by a retaining washer 18.
  • both the spindle 10 at its end and the knob 1 have a male-female coupling with two or more parallel flat faces 13-14 and facing each other.
  • the spindle 10 is embedded in the end where the knob 1 1 is located and in the opposite end is supported on an upper pin 12, so that this support provides on the one hand a reduction of the moment in the embedment and the efforts in the same, extending the useful life of the tool and facilitating the opening of the tool for large thicknesses and on the other hand, prevents bending of the opposite end of the spindle 10 when the carriage nut 9 approaches this position.
  • the forward portion of the pin 10 that rests on the upper spindle 12 comprises a diametral narrowing 23.
  • this pincer has a spring 5 anchored to the movable jaw 3 and to the carriage nut 9, instead of between the movable and fixed jaws or between the movable jaw and the fixed handle as in the traditional jaws, in such a way that this arrangement of the spring 5 increases its tensile force as the adjustment of the thickness of the object to be held with the pliers increases, being adequate and sufficient in all the adjustment positions.
  • the movable jaw 3 is complemented with a fixed jaw 2 attached to the fixed handle 1 with pins 20 and 21.
  • the nut carriage 9 is associated to one end of a connecting rod 6-6 'by means of a rear articulation pin 7, which acts as an articulation between the connecting rod 6-6' and the carriage nut 9 thanks to the configuration of cradle that has said carriage nut 9 in its lower part.
  • the connecting rod 6-6 ' connects at its opposite end with the movable handle 4 through an anterior articulation pin 17.
  • the articulation of the rear pin 7 of the nut carriage 9 is a cylindrical support of such a rear pin 7 on said cradle, which improves the discharge of forces and in this way allows and facilitates its assembly and disassembly, its cleaning and maintenance, as well as facilitates also the replacement of the spring or spring 5.
  • the fixed handle 1 is complemented by the mobile handle 4 to which an unlocking cam 8 is connected in turn, said mobile handle 4 is connected to the mobile jaw 3 by means of a lower articulation pin 16, the mobile jaw 3 engaging the fixed handle 1 by means of a central articulation pin 15.
  • the nut carriage 9 has an open lower support housing 19, at the bottom of which it articulates the rear articulation pin 7 that links the connecting rod 6-6 'with said carriage nut 9.
  • the open lower support housing 19 comprises a structure as a male element that is located between a pair of wings 44 that are part of the connecting rod 6 '.
  • the open lower support housing 19 comprises a structure as a female element that receives an end part of the connecting rod (6).
  • the spring 5 is connected by an anterior end thereof in a hole 42 of the movable jaw 3, while the rear end of such spring 5 connects with a perforation 22 established in an advanced area of the carriage nut 9.
  • Said hole 42 is located located between the articulation of the central articulation pin 15 and the lower articulation pin 16.
  • the spindle 10 is held in an axial direction outwardly in a rear wall 24 of the fixed handle 1, said rear wall 24 is affected by a through hole 25 through which a terminal section 26 of such spindle 10 appears outside, said said spindle 10 with an annular shoulder 27 that abuts against the inner face of the rear wall 24 of the fixed handle 1 as an axial retention means in the direction of said outside spindle.
  • Said annular shoulder 27 can be replaced by a flat elastic washer 43.
  • the knob 1 1 is coupled in the terminal section 26 of the spindle 10, at the same time that said knob has an axial hole 28 where said terminal section 26 of the spindle 10 is embedded, carrying out the axial retention in the direction of said spindle inwards .
  • the coupling between the terminal section 26 of the spindle 10 and axial hole 28 of the knob 1 1 comprises anti-rotation means determined by the corresponding male female coupling with the flat faces 13-14 mentioned above.
  • the unlocking cam 8 is connected under pressure to the movable handle 4 inside it by means of a spring 41 arranged in correspondence with opposite articulation holes 30 of the unlocking cam 8 connected to the movable handle 4.
  • Said unlocking cam has a body 39, preferably made of plastic resistance material and can be manufactured in other materials, said body 39 incorporating a small sheet 40 of hardened steel in the contact area with the connecting rod 6-6 'for greater specific resistance to compression and friction.
  • the body 39 also has an articulation hole 31 and locking holes 33 and 34 arranged on both sides of said joint hole 31.
  • the unlocking cam 8 has a tilting converter 29 articulated in the articulation hole 31, which in one of its positions leaves locked appendices 32 in the locking holes 33 of the cam 8, thereby remaining the converter 29 retracted in the concavity thereof.
  • These appendices 32 are symmetrical and convex.
  • the appendages 32 are interlocked in the locking holes 34 of the cam 8, in this way the converter 29, thanks to a chock 35 which it has at its end, is interposed between the support of the cam 8 with the connecting rod 6-6 'preventing blockage in any adjustment position, allowing the operation of the adjustable pliers as a pliers remaining ergonomic for the grip of large piece thicknesses and that can act with multiplied tightening power, facts that are impossible with ordinary or universal pliers.
  • Said chock 35 is configured by a metal sheet that has one or more folds, in addition to its task of preventing blockage, a spring effect function which facilitates the opening of the handles together.
  • adjustable tongs can be fitted with linings 36 and 37 of plastic material, which cover the metal surface of the fixed and mobile handles 4, whose interior shapes fit with the outer shapes of their respective handles.
  • Said liners also carry an extension of their wings in the form of eyelashes 38 that perimetrically wrap the edges of said handles and secure said liners to said edges.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Abstract

The invention relates to an adjustable self-locking pliers essentially comprising a fixed handle (1), a fixed jaw (2), a moving jaw (3) and a rod connected to a mechanism for adjusting the distance between the teeth of the two jaws. The invention is characterised in that the adjustment mechanism comprises a bolt (10) disposed in an internal longitudinal cavity in the fixed handle (1) and retained axially in both directions. The bolt (10) is linked to a traveller nut (9) which is guided in the internal longitudinal cavity without rotation. The pliers are characterised in that they also includes an unlocking cam (8) including a rocker converter which, in one of the closed positions thereof, is positioned at the point at which the unlocking cam (8) is in contact with the rod (6-6').

Description

TENAZA AJUSTABLE AUTOBLOCANTE  AUTOBLOCANT ADJUSTABLE TENAZA
OBJETO DE LA INVENCIÓN  OBJECT OF THE INVENTION
La presente invención, según se expresa en el enunciado de esta memoria descriptiva, se refiere a una tenaza ajustable autoblocante cuyas características estructurales y ergonómicas facilitan al usuario el manejo de la misma y la regulación de su apertura, reduciendo los esfuerzos a aplicar en dicha regulación y proporcionando una protección de los hilos de rosca del husillo contra golpes o proyecciones de soldadura. The present invention, as expressed in the statement of this specification, refers to an adjustable self-locking pliers whose structural and ergonomic characteristics facilitate the user to handle it and regulate its opening, reducing the efforts to be applied in said regulation. and providing a protection of the spindle threads against blows or welding projections.
Asimismo, posee una leva para el desbloqueo de la herramienta, en la que se ha instalado un dispositivo convertidor que permite emplear la tenaza ajustable como un alicate ajustable, proporcionando una mayor ergonomía de asido con independencia del espesor de la pieza a sujetar y aprovechando el efecto multiplicador de los esfuerzos de apriete que proporciona una tenaza ajustable. It also has a cam for unlocking the tool, in which a converter device has been installed that allows the use of the adjustable pliers as an adjustable pliers, providing greater grip ergonomics regardless of the thickness of the piece to be held and taking advantage of the multiplier effect of the tightening efforts that provides an adjustable pliers.
ANTECEDENTES DE LA INVENCIÓN  BACKGROUND OF THE INVENTION
Las tenazas ajustables trabajan de manera que aprietan distintos espesores de objetos variando la geometría de las posiciones de los puntos A - B - C - D, articulaciones que constituyen la cadena cinemática del sistema.  The adjustable tongs work in such a way that they tighten different thicknesses of objects by varying the geometry of the positions of points A - B - C - D, joints that constitute the kinematic chain of the system.
En posición abierta, estos puntos de articulación forman un cuadrilátero articulado de manera que los lados de dicho cuadrilátero comprenden:  In the open position, these articulation points form an articulated quadrilateral so that the sides of said quadrilateral comprise:
- AB: Una mordaza móvil.  - AB: A mobile jaw.
- BC: Empuñadura móvil.  - BC: Mobile handle.
- CD: Una biela.  - CD: A connecting rod.
- DA: Una empuñadura fija más un mecanismo de reglaje y más una mordaza fija.  - DA: A fixed handle plus an adjustment mechanism and more a fixed jaw.
Para bloquear la tenaza sobre un objeto, en posición cerrada, el cuadrilátero se transforma en un triángulo poniéndose en línea tres de sus puntos de articulación B-C-D.  To block the pincer on an object, in a closed position, the quadrilateral is transformed into a triangle by putting three of its B-C-D articulation points in line.
El reglaje para distintos espesores de objetos se obtiene variando la longitud de alguno de los lados del cuadrilátero, en este caso variando el lado DA. Además, en la práctica, dado que tres puntos en línea están en equilibrio inestable, se necesita asegurar la estabilidad del bloqueo haciendo que la biela y la leva de desbloqueo se apoyen entre sí, de manera que un punto de articulación centrado quede situado por dentro de la línea que engloba ese punto centrado de articulación y otros dos puntos de articulación extremos (ángulo formado entre estos tres puntos mayor de 180°). Para deshacer este bloqueo y obtener la posición abierta es preciso pasar dicho ángulo a un ángulo menor de 180° utilizando la palanca de la leva. The adjustment for different thicknesses of objects is obtained by varying the length of some of the sides of the quadrilateral, in this case by varying the DA side. Furthermore, in practice, since three points in line are in unstable equilibrium, it is necessary to ensure the stability of the blockage by having the connecting rod and the release cam support each other, so that a centered articulation point is located inside of the line that encompasses that centered point of articulation and two other extreme points of articulation (angle formed between these three points greater than 180 °). To undo this block and obtain the open position it is necessary to pass this angle to an angle less than 180 ° using the lever of the cam.
La forma más común para regular la apertura de una tenaza ajustable se efectúa mediante el giro de un pomo de un tornillo que se aloja en la parte posterior de la empuñadura fija de la tenaza y que se va separando, de forma axial, de la empuñadura fija, a medida que aumenta el espesor del objeto a asir y por lo tanto la separación necesaria entre las mordazas de la tenaza.  The most common way to regulate the opening of an adjustable pliers is done by turning a knob of a screw that is housed in the rear of the fixed grip of the pliers and that is separated axially from the handle fixed, as the thickness of the object to be grasped increases and therefore the necessary separation between the jaws of the pliers.
Otra forma conocida de regulación consiste en girar una tuerca situada en la zona central de la empuñadura fija, cuyo desplazamiento axial queda inmovilizado por la propia empuñadura, desplazando dicha tuerca un husillo cuyo giro se inmoviliza con la biela que lleva conectada.  Another known form of regulation consists in turning a nut located in the central area of the fixed handle, whose axial displacement is immobilized by the handle itself, said nut displacing a spindle whose rotation is immobilized with the connecting rod connected.
Más recientemente, en la patente de invención con número de publicación en España ES2125757, se emplea un sistema de regulación accionado por un pomo que se separa de la empuñadura fija, que hace girar un husillo sobre el que se traslada una grapa, la cual se encuentra guiada en unas aberturas realizadas sobre la empuñadura fija, encontrándose articulada sobre dicha grapa la parte posterior de la biela.  More recently, in the invention patent with publication number in Spain ES2125757, a regulating system operated by a knob is used that separates from the fixed handle, which spins a spindle on which a staple is moved, which is It is guided in openings made on the fixed handle, the rear part of the connecting rod being articulated on said clip.
El problema de dicho sistema radica por un lado en que dichas aberturas dejan desprotegido el ranurado del husillo frente a la entrada de impurezas, golpes, etc., lo que puede afectar a la regulación de la tenaza.  The problem of said system lies on the one hand in which said openings leave the spindle groove unprotected against the entry of impurities, blows, etc., which may affect the regulation of the pliers.
Por otro lado el hecho de tener el husillo empotrado en el extremo de la empuñadura fija genera en dicho extremo unos momentos de flexión y esfuerzos elevados que dificultan en caso de aperturas extremas el ajuste de la tenaza, disminuyendo la vida útil de la misma. Además hay que añadir que dicho mecanismo de regulación no es desmontable, por lo que es muy complicado realizar en el mismo operaciones de mantenimiento. On the other hand, the fact of having the spindle embedded in the end of the fixed handle generates at that end some moments of flexion and high stresses that make it difficult to adjust the pincer in the case of extreme openings, reducing its useful life. In addition, it should be added that said regulation mechanism is not removable, so it is very difficult to perform maintenance operations in the same.
En dicha patente se protege un sistema para convertir la tenaza ajustable en un alicate, dicho sistema se basa en una corredera móvil situada en la empuñadura fija y un tornillo de punta que sobresale de la leva de desbloqueo, de tal modo que en la posición de la corredera de funcionamiento como alicate el tornillo hace tope con la misma evitando el bloqueo.  In said patent a system is protected to convert the adjustable pliers into a pliers, said system is based on a mobile slide located on the fixed handle and a pointed screw protruding from the release cam, so that in the position of The operating slide as pliers the screw stops with it avoiding the blockage.
El problema de dicho sistema radica en que el esfuerzo de sujeción debe ser regulado con el tornillo, por lo tanto de un modo manual y que dificulta y hace incómodo el empleo de la tenaza.  The problem with this system is that the clamping force must be regulated with the screw, therefore in a manual way and that makes the use of the pliers difficult and uncomfortable.
Asimismo, las tenazas ajustables poseen un muelle entre la mordaza fija o la empuñadura fija y la mordaza móvil, que ayuda a abrir dichas tenazas al desbloquearse, ejerciendo su tracción máxima cuando la tenaza está ajustada para un espesor mínimo con el inconveniente de que la fuerza del muelle se ve reducida al aumentar el espesor de la pieza a sujetar, llegando si el espesor es máximo a no existir fuerza.  Also, the adjustable pliers have a spring between the fixed jaw or the fixed grip and the movable jaw, which helps to open said pliers when unlocked, exerting its maximum traction when the clamp is adjusted for a minimum thickness with the disadvantage that the force The spring is reduced by increasing the thickness of the workpiece, reaching if the thickness is maximum if there is no force.
Lo mismo ocurre con la patente WO 9937445, que lleva un tornillo pomo enterizo, un muelle anclado a un punto fijo, un carro encapsulado en la empuñadura fija mediante unas pestañas dobladas en las extremidades de las alas de dicha empuñadura y con una articulación indesmontable de la biela en posición coaxial con el husillo.  The same applies to WO 9937445, which has an integral screw, a spring anchored to a fixed point, a carriage encapsulated in the fixed handle by means of bent tabs at the ends of the wings of said handle and with an unbreakable joint of the connecting rod in coaxial position with the spindle.
DESCRIPCIÓN DE LA INVENCIÓN  DESCRIPTION OF THE INVENTION
Con el fin de alcanzar los objetivos y evitar los inconvenientes mencionados en los apartados anteriores, la invención propone una tenaza ajustable autoblocante que cuenta con una empuñadura fija, a la cual se une solidariamente una mordaza fija complementada a su vez con una mordaza móvil. Esta mordaza móvil se articula en la empuñadura fija, y por su otro extremo con una empuñadura móvil, encontrándose la empuñadura móvil vinculada al extremo anterior de una biela que por su extremo posterior y a través de un pasador transversal se conecta y se apoya en un mecanismo de regulación de la distancia entre los dentados enfrentados de ambas mordazas. La invención se caracteriza porque el mecanismo de regulación comprende un husillo dispuesto a lo largo de una cavidad interior longitudinal de la empuñadura fija, a la vez que está retenido axialmente en ambos sentidos, vinculándose dicho husillo con un carro tuerca guiado a lo largo de dicha cavidad interior longitudinal sin movimiento rotacional, vinculándose con dicho carro tuerca la biela por su extremo posterior mediante un pasador posterior de articulación. In order to achieve the objectives and avoid the inconveniences mentioned in the previous sections, the invention proposes an adjustable self-locking pliers that have a fixed handle, to which a fixed jaw joined in turn joined in turn with a movable jaw. This movable jaw is articulated in the fixed handle, and at its other end with a movable handle, the movable handle being connected to the front end of a connecting rod that, at its rear end and through a transverse pin, connects and rests on a mechanism of regulation of the distance between the cogged teeth of both jaws. The invention is characterized in that the adjustment mechanism comprises a spindle arranged along a longitudinal internal cavity of the fixed handle, while being axially retained in both directions, said spindle being linked with a guided carriage along said guide longitudinal interior cavity without rotational movement, linking with said carriage nuts the connecting rod at its rear end by means of a rear articulation pin.
Otra características de la invención es que la cavidad interior longitudinal de la empuñadura fija comprende un fondo arqueado en forma de bóveda sobre el que apoya complementariamente la parte superior curvoconvexa del carro tuerca.  Another feature of the invention is that the longitudinal interior cavity of the fixed handle comprises an arched vault-shaped bottom on which the curved convex upper part of the nut carriage is complementary.
El husillo apoya por una porción adelantada del mismo sobre el pasador superior unido a la empuñadura fija, porción adelantada determinada por un estrechamiento diametral.  The spindle supports an advanced portion thereof on the upper pin attached to the fixed handle, an advanced portion determined by a diametral narrowing.
Otra característica de la invención es que la articulación entre la biela y la tuerca se produce, indistintamente en configuración macho-hembra ó hembra-macho, en un eje transversal descentrado respecto al eje longitudinal del husillo descargando y repartiendo sin ningún problema todas las cargas excéntricas sobre el propio husillo y sobre una gran superficie en el fondo de la empuñadura fija.  Another feature of the invention is that the articulation between the connecting rod and the nut occurs, indistinctly in male-female or female-male configuration, in an offset transverse axis with respect to the longitudinal axis of the spindle unloading and distributing without any problem all the eccentric loads on the spindle itself and on a large surface at the bottom of the fixed handle.
Otra característica de la invención es que el carro tuerca incorpora un alojamiento abierto de apoyo inferior con asiento doble o sencillo, en cuyo fondo se acopla el pasador posterior de la biela quedando desmontable en la articulación.  Another feature of the invention is that the nut carriage incorporates an open lower support housing with a double or single seat, at the bottom of which the rear pin of the connecting rod is attached, being removable in the joint.
Otra característica de la invención es que el husillo recibe la carga longitudinal a través de la tuerca, transmitiéndola a la empuñadura fija mediante una sección de gran diámetro en una zona de máxima resistencia de su pared posterior, por lo tanto mejora la distribución de carga dado que en la mayoría de los modelos existentes la carga la recibe sólo la punta de sección estrecha del husillo.  Another feature of the invention is that the spindle receives the longitudinal load through the nut, transmitting it to the fixed handle by means of a large diameter section in an area of maximum strength of its rear wall, therefore improving the given load distribution that in most existing models the load is received only by the narrow section tip of the spindle.
Otra característica de la invención es que la tenaza comprende un muelle conectado a dos elementos móviles, la mordaza móvil y el carro tuerca, que se desplazan en la misma dirección con lo que se elimina el problema de reducción de fuerza para la apertura de las mordazas Another feature of the invention is that the pliers comprise a spring connected to two mobile elements, the movable jaw and the carriage nut, that move in the same direction which eliminates the problem of reduction of force for the opening of the jaws
Otra característica de la invención es que el husillo está retenido axialmente en un sentido hacia fuera en una pared posterior de la empuñadura fija, pared posterior afectada de un orificio pasante por donde asoma al exterior un tramo terminal de tal husillo, contando dicho husillo con un resalte anular que hace tope contra la cara interna de la pared posterior citada de la empuñadura fija como medio de retención axial en el sentido hacia fuera del citado husillo como se ha referido anteriormente y como apoyo de resistencia para descarga de esfuerzos. Dicho resalte anular puede ser sustituido por una arandela plana o elástica que recoge el empuje del husillo y lo descarga en la pared de la empuñadura fija, pudiendo servir en su caso al mismo tiempo de muelle elástico mitigador de la rigidez en el bloqueo.  Another feature of the invention is that the spindle is axially retained in an outward direction in a rear wall of the fixed handle, affected rear wall of a through hole through which a terminal section of such spindle appears outside, said spindle counting on a annular protrusion that abuts against the internal face of the aforementioned rear wall of the fixed handle as an axial retention means in the direction towards the outside of said spindle as referred to above and as a resistance support for stress relief. Said annular projection can be replaced by a flat or elastic washer that picks up the spindle thrust and discharges it into the wall of the fixed handle, being able to serve as the case at the same time as an elastic spring mitigating the stiffness in the blockage.
La tenaza se caracteriza también porque comprende un pomo acoplado en el tramo terminal del husillo, contando el pomo con un orificio axial donde se encastra el citado tramo terminal del husillo.  The pincer is also characterized in that it comprises a doorknob coupled in the terminal section of the spindle, the knob having an axial hole where the said terminal section of the spindle is embedded.
Otra característica de la invención es que el acoplamiento entre el tramo terminal del husillo y orificio axial del pomo, comprende tal acoplamiento medios antigiro relativo entre ambos elementos determinados por unas áreas planas complementadas entre sí.  Another feature of the invention is that the coupling between the terminal section of the spindle and the axial hole of the knob comprises such a relative anti-rotation means coupling between both elements determined by flat areas complemented with each other.
Otra característica más de la invención es que desacoplando dicho pomo se puede desmontar todo el mecanismo de reglaje.  Another feature of the invention is that by decoupling said knob, the entire adjustment mechanism can be disassembled.
Por otro lado, el invento incorpora un convertidor articulado a la leva de desbloqueo con un pasador transversal que permanece enclavado en dos posiciones. Por un lado en una posición escamoteada en el hueco de la leva y por otro lado, basculando mediante un simple giro con un dedo hasta que se apoya en la zona de contacto de la leva con la biela y se interpone entre el apoyo de ambas, impidiendo de este modo el bloqueo en todas las posiciones de reglaje permitiendo el funcionamiento de la herramienta como un alicate que permanece ergonómico para el asido de grandes espesores de pieza, hecho éste que resulta imposible con los alicates universales. Otra característica de la invención es que la leva de desbloqueo, siempre metálica en este tipo de tenazas, pegada a la empuñadura móvil en su interior por la presión de un muelle, está fabricada en material plástico de resistencia y lleva insertada una pequeña lámina de acero templado en la zona de contacto con la biela para mayor resistencia específica a la compresión y al rozamiento. On the other hand, the invention incorporates an articulated converter to the release cam with a transverse pin that remains locked in two positions. On the one hand in a retracted position in the hollow of the cam and on the other hand, swinging by a simple turn with a finger until it rests on the contact area of the cam with the connecting rod and interposes between the support of both, thus preventing blockage in all adjustment positions allowing the tool to function as a pliers that remain ergonomic for the grip of large piece thicknesses, which is impossible with universal pliers. Another feature of the invention is that the unlocking cam, always metallic in this type of pliers, attached to the mobile handle inside by the pressure of a spring, is made of plastic resistance material and has a small sheet of steel inserted hardened in the zone of contact with the connecting rod for greater specific resistance to compression and friction.
Por último cabe señalar que otra característica de la invención es que se han dispuesto sendos forros en material plástico cubriendo las dos empuñaduras de manera que proporcionan un mejor tacto con mayor confort y de tal forma que por las características dieléctricas de los forros, el pomo y la leva de desbloqueo pueden aislar la mano de un voltaje doméstico.  Finally, it should be noted that another feature of the invention is that two linings have been arranged in plastic material covering the two handles so that they provide a better touch with greater comfort and in such a way that due to the dielectric characteristics of the linings, the knob and The unlocking cam can isolate the hand from a domestic voltage.
A continuación para facilitar una mejor comprensión de esta memoria descriptiva y formando parte integrante de la misma se acompañan unas figuras en las que con carácter ilustrativo y no limitativo se ha representado el objeto de la invención.  Next, in order to facilitate a better understanding of this descriptive report and forming an integral part thereof, some figures are attached in which the object of the invention has been shown as an illustrative and non-limiting nature.
BREVE DESCRIPCIÓN DE LOS DIBUJOS  BRIEF DESCRIPTION OF THE DRAWINGS
Figura 1.- Muestra una vista de perfil de la tenaza ajustable autoblocante, objeto de la invención. La tenaza está en una posición cerrada con reglaje para espesor cero.  Figure 1.- Shows a profile view of the self-locking adjustable pliers, object of the invention. The pliers are in a closed position with zero thickness adjustment.
Figura 2.- Muestra una vista de la sección del perfil de la tenaza ajustable autoblocante de la invención.  Figure 2.- Shows a view of the profile section of the self-locking adjustable pliers of the invention.
Figura 3.- Muestra una vista similar a la anterior en la que la tenaza se encuentra en posición abierta y en la que se han representado las empuñaduras.  Figure 3.- Shows a view similar to the previous one in which the pliers are in the open position and in which the handles have been represented.
Figura 4.- Muestra una vista en sección correspondiente al corte G-G de la Figura 1 .  Figure 4.- Shows a sectional view corresponding to the G-G section of Figure 1.
Figuras 5 a 15.- Muestra distintas vistas en perspectiva de algunas características y piezas que incorpora la tenaza de la invención.  Figures 5 to 15.- It shows different perspective views of some features and parts that incorporates the pliers of the invention.
Figura 16.- Comparación entre al agarre de un alicate y una tenaza con diferentes espesores de piezas.  Figure 16.- Comparison between the grip of a plier and a pliers with different thicknesses of pieces.
DESCRIPCIÓN DE LA FORMA DE REALIZACIÓN PREFERIDA Considerando la numeración adoptada en las figuras, la tenaza ajustable autoblocante comprende una empuñadura fija 1 , cuyo espacio interior sirve de sistema de guiado de un carro tuerca 9, correspondiéndose dicho sistema de guiado con la forma de arco que posee el carro tuerca 9 en su superficie superior arqueada con el fondo en forma de bóveda que posee la empuñadura fija en su interior. DESCRIPTION OF THE PREFERRED EMBODIMENT Considering the numbering adopted in the figures, the self-locking adjustable pliers comprises a fixed handle 1, whose interior space serves as a guide system for a nut carriage 9, said guide system corresponding to the arc shape of the nut carriage 9 in its upper surface arched with the vault-shaped bottom that has the fixed handle inside.
El carro tuerca 9 se desplaza axialmente sobre un husillo 10 gracias al sistema de guiado, que evita el giro del carro tuerca 9 sobre el husillo 10, cuando el mismo es girado mediante un pomo 1 1 .  The nut carriage 9 moves axially on a spindle 10 thanks to the guiding system, which prevents the rotation of the carriage nut 9 on the spindle 10, when it is turned by means of a knob 1 1.
Este pomo 1 1 se mantiene en posición invariable respecto a la empuñadura fija 1 , y se encuentra unido al husillo 10, bien mediante roscado o bien mediante una arandela de retención 18.  This knob 1 1 is maintained in an invariable position with respect to the fixed handle 1, and is attached to the spindle 10, either by threading or by a retaining washer 18.
Para evitar el giro del pomo 1 1 sobre el husillo 10 y para que ambos giren solidariamente, tanto el husillo 10 en su parte extrema como el pomo 1 1 , poseen un acoplamiento macho-hembra con dos o más caras planas 13-14 paralelas y enfrentadas entre sí.  To prevent the rotation of the knob 1 1 on the spindle 10 and so that both rotate in solidarity, both the spindle 10 at its end and the knob 1 1, have a male-female coupling with two or more parallel flat faces 13-14 and facing each other.
El husillo 10 se encuentra empotrado en el extremo donde se encuentra el pomo 1 1 y en el extremo opuesto se encuentra apoyado sobre un pasador superior 12, de manera que este apoyo proporciona por un lado una reducción del momento en el empotramiento y los esfuerzos en el mismo, alargando la vida útil de la herramienta y facilitando la apertura de la misma para grandes espesores y por otro lado, evita la flexión del extremo opuesto del husillo 10 cuando el carro tuerca 9 se acerca a dicha posición.  The spindle 10 is embedded in the end where the knob 1 1 is located and in the opposite end is supported on an upper pin 12, so that this support provides on the one hand a reduction of the moment in the embedment and the efforts in the same, extending the useful life of the tool and facilitating the opening of the tool for large thicknesses and on the other hand, prevents bending of the opposite end of the spindle 10 when the carriage nut 9 approaches this position.
La porción adelantada del pasador 10 que apoya sobre el husillo superior 12 comprende un estrechamiento diametral 23.  The forward portion of the pin 10 that rests on the upper spindle 12 comprises a diametral narrowing 23.
Por otro lado, esta tenaza posee un resorte 5 anclado a la mordaza móvil 3 y al carro tuerca 9, en vez de entre las mordazas móvil y fija o entre la mordaza móvil y la empuñadura fija como en las tenazas tradicionales, de tal manera que esa disposición del resorte 5 hace aumentar su fuerza de tracción a medida que se aumenta el ajuste del espesor del objeto a sujetar con la tenaza, resultando adecuado y suficiente en todas las posiciones de ajuste. La mordaza móvil 3 se complementa con una mordaza fija 2 unida a la empuñadura fija 1 con unos pasadores 20 y 21 . On the other hand, this pincer has a spring 5 anchored to the movable jaw 3 and to the carriage nut 9, instead of between the movable and fixed jaws or between the movable jaw and the fixed handle as in the traditional jaws, in such a way that this arrangement of the spring 5 increases its tensile force as the adjustment of the thickness of the object to be held with the pliers increases, being adequate and sufficient in all the adjustment positions. The movable jaw 3 is complemented with a fixed jaw 2 attached to the fixed handle 1 with pins 20 and 21.
Por último, el carro tuerca 9 se encuentra asociado a un extremo de una biela 6-6' mediante un pasador posterior de articulación 7, el cual hace de articulación entre la biela 6-6' y el carro tuerca 9 gracias a la configuración de cuna que posee dicho carro tuerca 9 en su parte inferior. A su vez, la biela 6-6' conecta por su extremo opuesto con la empuñadura móvil 4 a través de un pasador anterior de articulación 17.  Finally, the nut carriage 9 is associated to one end of a connecting rod 6-6 'by means of a rear articulation pin 7, which acts as an articulation between the connecting rod 6-6' and the carriage nut 9 thanks to the configuration of cradle that has said carriage nut 9 in its lower part. In turn, the connecting rod 6-6 'connects at its opposite end with the movable handle 4 through an anterior articulation pin 17.
La articulación del pasador posterior 7 del carro tuerca 9 es un apoyo cilindrico de tal pasador posterior 7 sobre la citada cuna, que mejora la descarga de fuerzas y de esta forma permite y facilita su montaje y desmontaje, su limpieza y mantenimiento, así como facilita también la sustitución del resorte o muelle 5.  The articulation of the rear pin 7 of the nut carriage 9 is a cylindrical support of such a rear pin 7 on said cradle, which improves the discharge of forces and in this way allows and facilitates its assembly and disassembly, its cleaning and maintenance, as well as facilitates also the replacement of the spring or spring 5.
La empuñadura fija 1 se complementa con la empuñadura móvil 4 a la cual se conecta una leva de desbloqueo 8 a su vez, dicha empuñadura móvil 4 se conecta con la mordaza móvil 3 mediante un pasador inferior de articulación 16, acoplándose la mordaza móvil 3 a la empuñadura fija 1 mediante un pasador central de articulación 15.  The fixed handle 1 is complemented by the mobile handle 4 to which an unlocking cam 8 is connected in turn, said mobile handle 4 is connected to the mobile jaw 3 by means of a lower articulation pin 16, the mobile jaw 3 engaging the fixed handle 1 by means of a central articulation pin 15.
Por otro lado, cabe señalar que el carro tuerca 9 cuenta con un alojamiento de apoyo inferior 19 abierto, en cuyo fondo articula el pasador posterior de articulación 7 que vincula la biela 6-6' con el citado carro tuerca 9.  On the other hand, it should be noted that the nut carriage 9 has an open lower support housing 19, at the bottom of which it articulates the rear articulation pin 7 that links the connecting rod 6-6 'with said carriage nut 9.
En una primera realización el alojamiento abierto de apoyo inferior 19 comprende una estructura a modo de elemento macho que se ubica entre un par de alas 44 que forman parte de la biela 6'.  In a first embodiment the open lower support housing 19 comprises a structure as a male element that is located between a pair of wings 44 that are part of the connecting rod 6 '.
En una segunda realización el alojamiento abierto de apoyo inferior 19 comprende una estructura a modo de elemento hembra que recibe una parte extrema de la biela (6).  In a second embodiment the open lower support housing 19 comprises a structure as a female element that receives an end part of the connecting rod (6).
Por otro lado, cabe señalar que el resorte 5 se conecta por un extremo anterior del mismo en un orificio 42 de la mordaza móvil 3, mientras que el extremo posterior de tal resorte 5 conecta con una perforación 22 establecida en una zona adelantada del carro tuerca 9. Dicho orificio 42 se encuentra ubicado entre la articulación del pasador central de articulación 15 y el pasador inferior de articulación 16. On the other hand, it should be noted that the spring 5 is connected by an anterior end thereof in a hole 42 of the movable jaw 3, while the rear end of such spring 5 connects with a perforation 22 established in an advanced area of the carriage nut 9. Said hole 42 is located located between the articulation of the central articulation pin 15 and the lower articulation pin 16.
El husillo 10 está retenido en un sentido axial hacia fuera en una pared posterior 24 de la empuñadura fija 1 , dicha pared posterior 24 se encuentra afectada de un orificio pasante 25 por donde asoma al exterior un tramo terminal 26 de tal husillo 10, contando dicho husillo 10 con un resalte anular 27 que hace tope contra la cara interior de la pared posterior 24 de la empuñadura fija 1 como medio de retención axial en sentido del citado husillo de fuera. Dicho resalte anular 27 puede ser sustituido por una arandela plana elástica 43.  The spindle 10 is held in an axial direction outwardly in a rear wall 24 of the fixed handle 1, said rear wall 24 is affected by a through hole 25 through which a terminal section 26 of such spindle 10 appears outside, said said spindle 10 with an annular shoulder 27 that abuts against the inner face of the rear wall 24 of the fixed handle 1 as an axial retention means in the direction of said outside spindle. Said annular shoulder 27 can be replaced by a flat elastic washer 43.
El pomo 1 1 está acoplado en el tramo terminal 26 del husillo 10, a la vez que dicho pomo cuenta con un orificio axial 28 donde se encastra el citado tramo terminal 26 del husillo 10, efectuando la retención axial en sentido del citado husillo hacia adentro.  The knob 1 1 is coupled in the terminal section 26 of the spindle 10, at the same time that said knob has an axial hole 28 where said terminal section 26 of the spindle 10 is embedded, carrying out the axial retention in the direction of said spindle inwards .
El acoplamiento entre el tramo terminal 26 del husillo 10 y orificio axial 28 del pomo 1 1 comprende medios antigiro determinados por el acoplamiento macho hembra correspondiente con las caras planas 13-14 citadas anteriormente.  The coupling between the terminal section 26 of the spindle 10 and axial hole 28 of the knob 1 1 comprises anti-rotation means determined by the corresponding male female coupling with the flat faces 13-14 mentioned above.
La leva de desbloqueo 8 se encuentra unida bajo presión a la empuñadura móvil 4 en su interior por medio de un muelle 41 dispuesto en correspondencia con unos orificios enfrentados de articulación 30 de la leva de desbloqueo 8 conectada a la empuñadura móvil 4.  The unlocking cam 8 is connected under pressure to the movable handle 4 inside it by means of a spring 41 arranged in correspondence with opposite articulation holes 30 of the unlocking cam 8 connected to the movable handle 4.
Dicha leva de desbloqueo posee un cuerpo 39, fabricado preferentemente en material plástico de resistencia pudiendo ser fabricado en otro tipo de materiales, incorporando dicho cuerpo 39 una pequeña lámina 40 de acero templado en la zona de contacto con la biela 6-6' para mayor resistencia específica a la compresión y al rozamiento.  Said unlocking cam has a body 39, preferably made of plastic resistance material and can be manufactured in other materials, said body 39 incorporating a small sheet 40 of hardened steel in the contact area with the connecting rod 6-6 'for greater specific resistance to compression and friction.
El cuerpo 39 posee además un orificio de articulación 31 y unos orificios de bloqueo 33 y 34 dispuestos a ambos lados de dicho orificio de articulación 31 .  The body 39 also has an articulation hole 31 and locking holes 33 and 34 arranged on both sides of said joint hole 31.
La leva de desbloqueo 8 lleva articulado en el orificio de articulación 31 un convertidor basculante 29, que en una de sus posiciones deja enclavados unos apéndices 32 en los orificios de bloqueo 33 de la leva 8, permaneciendo de ese modo el convertidor 29 escamoteado en la concavidad de la misma. Dichos apéndices 32 son simétricos y convexos. The unlocking cam 8 has a tilting converter 29 articulated in the articulation hole 31, which in one of its positions leaves locked appendices 32 in the locking holes 33 of the cam 8, thereby remaining the converter 29 retracted in the concavity thereof. These appendices 32 are symmetrical and convex.
En la otra posición deja enclavados los apéndices 32 en los orificios de bloqueo 34 de la leva 8, de ese modo el convertidor 29, gracias a un calzo 35 que posee en su extremo, se interpone entre el apoyo de la leva 8 con la biela 6-6' impidiendo el bloqueo en cualquier posición de reglaje, con lo que permite el funcionamiento de la tenaza ajustable como un alicate permaneciendo ergonómico para el asido de grandes espesores de pieza y que puede actuar con potencia de apriete multiplicada, hechos que resultan imposibles con los alicates ordinarios o universales.  In the other position, the appendages 32 are interlocked in the locking holes 34 of the cam 8, in this way the converter 29, thanks to a chock 35 which it has at its end, is interposed between the support of the cam 8 with the connecting rod 6-6 'preventing blockage in any adjustment position, allowing the operation of the adjustable pliers as a pliers remaining ergonomic for the grip of large piece thicknesses and that can act with multiplied tightening power, facts that are impossible with ordinary or universal pliers.
Dicho calzo 35 se encuentra configurado por una chapa metálica que posee uno o varios pliegues, realizando además de su labor de evitar el bloqueo, una función de efecto muelle lo que facilita a la apertura entre sí de las empuñaduras.  Said chock 35 is configured by a metal sheet that has one or more folds, in addition to its task of preventing blockage, a spring effect function which facilitates the opening of the handles together.
Por último destacar que a la tenaza ajustable se le pueden incorporar unos forros 36 y 37 de material plástico, que cubren la superficie metálica de las empuñaduras fija 1 y móvil 4, cuyas formas interiores se ajustan con las formas exteriores de sus respectivas empuñaduras.  Finally, it should be noted that the adjustable tongs can be fitted with linings 36 and 37 of plastic material, which cover the metal surface of the fixed and mobile handles 4, whose interior shapes fit with the outer shapes of their respective handles.
Dichos forros llevan además una prolongación de sus alas en forma de unas pestañas 38 que envuelven perimetralmente los bordes de dichas empuñaduras y fijan dichos forros a dichos bordes.  Said liners also carry an extension of their wings in the form of eyelashes 38 that perimetrically wrap the edges of said handles and secure said liners to said edges.
Mediante estos forros en material dieléctrico se consigue aislar las empuñaduras, y a la vez se obtiene una mejor ergonomía de asido.  By means of these linings in dielectric material, it is possible to isolate the handles, and at the same time a better grip ergonomics is obtained.

Claims

REIVINDICACIONES
1. - TENAZA AJUSTABLE AUTOBLOCANTE, que cuenta con una empuñadura fija, a la cual se une una mordaza fija complementada con una mordaza móvil que articula en la empuñadura fija a la vez que tal mordaza móvil se conecta articuladamente con una empuñadura móvil vinculada a ésta con un extremo anterior de una biela que se conecta por un extremo posterior articuladamente con un mecanismo de regulación de la distancia entre los dentados enfrentados de ambas mordazas; caracterizada porque el mecanismo de regulación comprende un husillo (10) dispuesto a lo largo de una cavidad interior longitudinal de la empuñadura fija (1 ) a la vez que está retenido axialmente en ambos sentidos por una pared posterior (24) de la empuñadura fija (1 ) y por un pomo (1 1 ), vinculándose dicho husillo (10) con un carro tuerca 9 guiado a lo largo de dicha cavidad interior longitudinal sin movimiento rotacional, vinculándose con dicho carro tuerca (9) la biela (6-6') por su extremo posterior mediante un pasador posterior de articulación (7); asimismo la tenaza ajustable comprende una leva de desbloqueo (8) que lleva incorporada un convertidor basculante (29) que en una de sus posiciones de cierre se interpone en el apoyo de la leva de desbloqueo (8) con la biela (6-6').  1. - AUTOBLOCANT ADJUSTABLE TENAZA, which has a fixed handle, to which a fixed jaw is joined complemented by a mobile jaw that articulates in the fixed handle while such a mobile jaw is articulated with a mobile handle linked to it with a front end of a connecting rod that is connected by a rear end articulated with a mechanism for regulating the distance between the teeth of both jaws facing; characterized in that the adjustment mechanism comprises a spindle (10) arranged along a longitudinal interior cavity of the fixed handle (1) while being axially retained in both directions by a rear wall (24) of the fixed handle ( 1) and by a knob (1 1), said spindle (10) being linked with a nut carriage 9 guided along said longitudinal interior cavity without rotational movement, said nut carriage (9) connecting the rod (6-6 ' ) at its rear end by means of a rear articulation pin (7); also the adjustable pliers comprises an unlocking cam (8) that incorporates a tilting converter (29) which in one of its closing positions interposes in the support of the unlocking cam (8) with the connecting rod (6-6 ' ).
2. - TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 1 , caracterizada porque la cavidad interior longitudinal de la empuñadura fija (1 ) comprende un fondo arqueado en forma de bóveda sobre el que apoya complementariamente la parte superior curvoconvexa del carro tuerca (9).  2. - AUTOBLOCANT ADJUSTABLE TENAZA, according to claim 1, characterized in that the longitudinal interior cavity of the fixed handle (1) comprises an arched vault-shaped bottom on which the curved convex upper part of the nut carriage (9) complements.
3. - TENAZA AJUSTABLE AUTOBLOCANTE, según una cualquiera de las reivindicaciones anteriores, caracterizada porque el husillo (10) apoya por una porción adelantada del mismo sobre un pasador superior 12 encastrado en la empuñadura fija (1 ).  3. - AUTOBLOCANT ADJUSTABLE TENAZA, according to any one of the preceding claims, characterized in that the spindle (10) rests by an advanced portion thereof on an upper pin 12 embedded in the fixed handle (1).
4. - TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 3, caracterizada porque la porción adelantada del pasador (10) que apoya sobre el pasador superior (12) comprende un estrechamiento diametral (23).  4. - AUTOBLOCANT ADJUSTABLE TENAZA, according to claim 3, characterized in that the forward portion of the pin (10) resting on the upper pin (12) comprises a diametral narrowing (23).
5. - TENAZA AJUSTABLE AUTOBLOCANTE, según una cualquiera de las reivindicaciones anteriores, caracterizada porque el carro tuerca (9) incorpora un alojamiento abierto de apoyo inferior (19), en cuyo fondo se acopla el pasador posterior de articulación (7). 5. - AUTOBLOCANT ADJUSTABLE TENAZA, according to any one of the preceding claims, characterized in that the carriage nut (9) incorporates an open lower support housing (19), at whose bottom the rear articulation pin (7) is attached.
6. - TENAZA AJUSTABLE AUTOBLOCANTE, según una cualquiera de las reivindicaciones anteriores, caracterizado porque comprende un resorte (5) conectado por su extremo anterior en un orificio (42) de la mordaza móvil (3), mientras que el extremo posterior de tal resorte (5) conecta en una perforación (22) establecida en una zona adelantada del carro tuerca (9).  6. - AUTOBLOCANT ADJUSTABLE TENAZA, according to any one of the preceding claims, characterized in that it comprises a spring (5) connected by its front end in a hole (42) of the movable jaw (3), while the rear end of such spring (5) connect in a hole (22) established in an advanced area of the carriage nut (9).
7. - TENAZA AJUSTABLE AUTOBLOCANTE, según una cualquiera de las reivindicaciones anteriores, caracterizada porque el husillo (10) está retenido axialmente en un sentido hacia fuera en la pared posterior (24) de la empuñadura fija (1 ), pared posterior afectada de un orificio pasante (25) por donde asoma al exterior un tramo terminal (26) de tal husillo (10), contando el husillo (10) a su vez con medios de retención axial hacia fuera del citado husillo (10).  7. - AUTOBLOCANT ADJUSTABLE TENAZA, according to any one of the preceding claims, characterized in that the spindle (10) is axially retained in an outward direction in the rear wall (24) of the fixed handle (1), affected rear wall of a through hole (25) where a terminal section (26) of such spindle (10) appears outside, counting the spindle (10) in turn with axial retention means out of said spindle (10).
8. - TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 7, caracterizada porque los medios de retención axial hacia fuera del husillo (10) comprenden un resalte anular (27) que hace tope contra la cara interna de la pared posterior (24) de la empuñadura fija (1 ).  8. - AUTOBLOCATING ADJUSTABLE TENAZA, according to claim 7, characterized in that the axial retaining means out of the spindle (10) comprise an annular shoulder (27) that abuts against the inner face of the rear wall (24) of the handle fixed (1).
9. - TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 7, caracterizada porque los medios de retención axial hacia fuera del husillo (10) comprenden una arandela plana elástica (43).  9. - AUTOBLOCANT ADJUSTABLE TENAZA, according to claim 7, characterized in that the axial retaining means out of the spindle (10) comprise an elastic flat washer (43).
10. - TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 7, caracterizada porque el pomo (1 1 ) acoplado en el tramo terminal (26) del husillo (10), cuenta con un orificio axial (28) donde se encastra el citado tramo terminal (26) del husillo (10).  10. - AUTOBLOCANT ADJUSTABLE TENAZA, according to claim 7, characterized in that the knob (1 1) coupled in the terminal section (26) of the spindle (10), has an axial hole (28) where said terminal section is embedded ( 26) of the spindle (10).
11. - TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 10 caracterizada porque el acoplamiento entre el tramo terminal (26) del husillo (10) y orificio axial (28) del pomo (1 1 ) comprende medios antigiro determinados por unas caras planas (13-14) complementadas entre sí y dispuestas en tal tramo terminal (26) y orificio axial (28).  11. - AUTOBLOCANT ADJUSTABLE TENAZA, according to claim 10, characterized in that the coupling between the terminal section (26) of the spindle (10) and axial hole (28) of the knob (1 1) comprises anti-rotation means determined by flat faces (13- 14) complemented each other and arranged in such a terminal section (26) and axial hole (28).
12. - TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 6, caracterizada porque el orificio (42) de la mordaza móvil (3) donde conecta el extremo anterior del resorte (5) se encuentra ubicado entre un pasador central de articulación (15) que asocia la mordaza móvil (3) con la empuñadura fija (1 ) y un pasador inferior de articulación (16) que vincula la empuñadura móvil (4) con la mordaza móvil (3). 12. - AUTOBLOCANT ADJUSTABLE TENAZA, according to claim 6, characterized in that the hole (42) of the movable jaw (3) where it connects the front end of the spring (5) is located between a central articulation pin (15) that associates the movable jaw (3) with the fixed handle (1) and a lower articulation pin (16) that links the movable handle ( 4) with the mobile jaw (3).
13 - TENAZA AJUSTABLE AUTOBLOCANTE, según una cualquiera de las reivindicaciones anteriores, caracterizada porque el pomo (1 1 ) está fabricado con un material dieléctrico  13 - AUTOBLOCANT ADJUSTABLE TENAZA, according to any one of the preceding claims, characterized in that the knob (1 1) is made of a dielectric material
14 - TENAZA AJUSTABLE AUTOBLOCANTE, según una cualquiera de las reivindicaciones anteriores, caracterizada porque el pomo (1 1 ) es desmontable pudiendo desmontar todo el mecanismo de reglaje.  14 - AUTOBLOCATING ADJUSTABLE TENAZA, according to any one of the preceding claims, characterized in that the knob (1 1) is removable and the entire adjustment mechanism can be disassembled.
15.- TENAZA AJUSTABLE AUTOBLOCANTE, según una cualquiera de las reivindicaciones anteriores, caracterizada porque la articulación de la biela (6-6') con el carro tuerca (9) correspondiente con el pasador posterior de articulación (7), se efectúa dicha articulación con excentricidad respecto al eje del husillo (10).  15.- AUTOBLOCANT ADJUSTABLE TENAZA, according to any one of the preceding claims, characterized in that the articulation of the connecting rod (6-6 ') with the corresponding carriage nut (9) with the rear articulation pin (7), said articulation is made eccentricity with respect to the spindle axis (10).
16 - TENAZA AJUSTABLE, AUTOBLOCANTE según la reivindicación 1 , caracterizada porque la leva de desbloqueo (8) se encuentra fabricada en material plástico de resistencia.  16 - ADJUSTABLE, AUTOBLOCANT TENAZA according to claim 1, characterized in that the unlocking cam (8) is made of plastic resistance material.
17 - TENAZA AJUSTABLE, AUTOBLOCANTE según la reivindicación 16, caracterizada porque la leva de desbloqueo (8) lleva insertada una pequeña lámina (40) de acero templado en la zona de contacto con la biela (6- 6').  17 - ADJUSTABLE, AUTOBLOCANT TENAZA according to claim 16, characterized in that the unlocking cam (8) has a small sheet (40) of tempered steel inserted in the contact area with the connecting rod (6- 6 ').
18. - TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 1 , caracterizada porque el convertidor basculante (29) posee en al menos uno de sus laterales, unos apéndices (32) simétricos y convexos que se alojan en unos orificios de bloqueo (33) y (34) de la leva de desbloqueo (8).  18. - AUTOBLOCANT ADJUSTABLE TENAZA, according to claim 1, characterized in that the tilting converter (29) has at least one of its sides, symmetrical and convex appendages (32) that are housed in locking holes (33) and ( 34) of the release cam (8).
19. - TENAZA AJUSTABLE AUTOBLOCANTE, según las reivindicaciones 15 a 17, caracterizada porque el convertidor basculante (29) posee en su extremo un calzo (35).  19. - AUTOBLOCANT ADJUSTABLE TENAZA, according to claims 15 to 17, characterized in that the tilting converter (29) has at its end a chock (35).
20. -.TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 18, caracterizada porque el calzo (35) se encuentra constituido por una lámina metálica con al menos un pliegue. 20. - AUTOBLOCANT ADJUSTABLE TENAZA, according to claim 18, characterized in that the wedge (35) is constituted by a metal sheet with at least one fold.
21. - TENAZA AJUSTABLE AUTOBLOCANTE, según las reivindicaciones anteriores, caracterizada porque a la empuñadura fija (1 ) y a la empuñadura móvil (4) se le insertan unos forros (36) y (37). 21. - AUTOBLOCANT ADJUSTABLE TENAZA, according to the preceding claims, characterized in that the lugs (36) and (37) are inserted into the fixed handle (1) and the mobile handle (4).
22. - TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 21 , caracterizada porque los forros (36) y (37) se encuentran fabricados con material dieléctrico.  22. - AUTOBLOCANT ADJUSTABLE TENAZA, according to claim 21, characterized in that the linings (36) and (37) are made of dielectric material.
23. - TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 5, caracterizada porque el alojamiento abierto de apoyo inferior (19) comprende una estructura a modo de elemento macho que se ubica entre un par de alas (44) que forman parte de la biela (6').  23. - AUTOBLOCATING ADJUSTABLE TENAZA, according to claim 5, characterized in that the open lower support housing (19) comprises a structure as a male element that is located between a pair of wings (44) that are part of the connecting rod (6 ').
24. - TENAZA AJUSTABLE AUTOBLOCANTE, según la reivindicación 5, caracterizada porque el alojamiento abierto de apoyo inferior (19) comprende una estructura a modo de elemento hembra que recibe una parte extrema de la biela (6).  24. - AUTOBLOCANT ADJUSTABLE TENAZA, according to claim 5, characterized in that the open lower support housing (19) comprises a structure as a female element that receives an end part of the connecting rod (6).
PCT/ES2011/070612 2010-09-09 2011-09-01 Adjustable self-locking pliers WO2012032204A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11823109.1A EP2614924A1 (en) 2010-09-09 2011-09-01 Adjustable self-locking pliers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP201031346 2010-09-09
ES201031346A ES2378100B1 (en) 2010-09-09 2010-09-09 AUTOBLOCANT ADJUSTABLE TENAZA.

Publications (1)

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WO2012032204A1 true WO2012032204A1 (en) 2012-03-15

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EP (1) EP2614924A1 (en)
ES (1) ES2378100B1 (en)
WO (1) WO2012032204A1 (en)

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EP2722529A1 (en) * 2012-10-22 2014-04-23 Kuhn S.A. Device for limiting the stroke of an actuator, actuator and agricultural machine having such a device
CN111887938A (en) * 2020-09-11 2020-11-06 中南大学湘雅医院 Nucleus pulposus clamping and taking system with functions of occlusion, suction and illumination
CN114800301A (en) * 2021-01-28 2022-07-29 施耐宝公司 High leverage locking pliers

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US10272545B2 (en) * 2014-07-18 2019-04-30 Hangzhou Great Star Tools Co., Ltd. Locking pliers

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US2201918A (en) * 1938-07-09 1940-05-21 Petersen William Wrench
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US3340754A (en) * 1966-09-21 1967-09-12 Clarence G Burchett Vise wrench
ES2125757A1 (en) 1994-05-20 1999-03-01 Facom Locking pliers
WO1999037445A1 (en) 1998-01-22 1999-07-29 Adjustable Clamp Company Locking pliers wrench
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US6450070B1 (en) * 2001-10-05 2002-09-17 John Andrew Winkler Locking plier tool

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2722529A1 (en) * 2012-10-22 2014-04-23 Kuhn S.A. Device for limiting the stroke of an actuator, actuator and agricultural machine having such a device
FR2997140A1 (en) * 2012-10-22 2014-04-25 Kuhn Sa IMPROVED DEVICE FOR LIMITING THE RUN OF AN ACTUATOR, ACTUATOR AND AGRICULTURAL MACHINE HAVING SUCH A DEVICE
CN111887938A (en) * 2020-09-11 2020-11-06 中南大学湘雅医院 Nucleus pulposus clamping and taking system with functions of occlusion, suction and illumination
CN114800301A (en) * 2021-01-28 2022-07-29 施耐宝公司 High leverage locking pliers

Also Published As

Publication number Publication date
ES2378100B1 (en) 2013-07-01
ES2378100A1 (en) 2012-04-09
EP2614924A1 (en) 2013-07-17

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