WO2003021022A1 - Device for selecting needles in circular knitting machines - Google Patents

Device for selecting needles in circular knitting machines Download PDF

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Publication number
WO2003021022A1
WO2003021022A1 PCT/ES2002/000418 ES0200418W WO03021022A1 WO 2003021022 A1 WO2003021022 A1 WO 2003021022A1 ES 0200418 W ES0200418 W ES 0200418W WO 03021022 A1 WO03021022 A1 WO 03021022A1
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WO
WIPO (PCT)
Prior art keywords
selection
polar
needles
jack
circular knitting
Prior art date
Application number
PCT/ES2002/000418
Other languages
Spanish (es)
French (fr)
Inventor
Alfonso Carreras De Cabrera
Original Assignee
Quantum Knitting Technologies 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 Quantum Knitting Technologies S.A. filed Critical Quantum Knitting Technologies S.A.
Priority to KR10-2004-7003346A priority Critical patent/KR20040035755A/en
Priority to EP02772412A priority patent/EP1433884A1/en
Publication of WO2003021022A1 publication Critical patent/WO2003021022A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
    • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
    • D04B15/78—Electrical devices

Definitions

  • the present invention relates to a device for the selection of needles in circular knitting machines by which new and advantageous characteristics are achieved with respect to what is currently known.
  • Multilevel systems there are basically two kinds of selection systems.
  • Multilevel systems the actuator has several selection systems that act on the elements to be selected in a staggered way, so for a time of action of each of the given systems the speed of the machine is increased by increasing the number of levels.
  • single-level systems the elements to be selected are operated directly.
  • single-level systems have the advantage of the economy over multilevels. They also have advantages of application for occupying smaller spaces.
  • the main disadvantage of single-level systems is the greater overall accuracy of the system when acting on each of the elements. Special difficulty represents synchronizing the action signal with the position of the action with respect to the element to be selected.
  • the present invention is intended to disclose a selection device that has operating advantages both by optimizing the magnetic forces in the area of discrimination of the selection through a multipolar arrangement and self-control of the synchronization position of the electromagnet with respect to the element to be selected.
  • the present invention relates to a device intended to transmit to the needles of a circular knitting machine the information of the sample to be knitted by acting on the so-called jacks that drive the needles.
  • the device comprises three basic polar systems: a preparation magnetic retention system, an electromagnetic system for making the selection and a retention system for the mechanical selection.
  • the selective capacity of the device is based on the opposition of forces that occur between the force of magnetic attraction exerted by the three polar systems on a face of the jack and a spring associated with it.
  • Figure 1 schematically shows the arrangement of polar systems with the interleaved electromagnetic system.
  • Figure 2 schematically shows the polar systems with the interspersed electromagnetic system but outside the alignment of the retention systems.
  • Figure 3 schematically shows the relative position of one end of a jack with respect to polar systems.
  • Figures 4 and 5 schematically show the path described by a jack selected with different starting points of the jack movement.
  • Figures 6 and 7 schematically show the realization of polar masses with different magnet arrangements.
  • Figure 8 shows schematically characteristic curves of a bipolar embodiment and two multipolar embodiments.
  • Figure 9 shows an arrangement applicable to a rectilinear knitting machine.
  • Figure 10 is a normal view of the polar faces representing the electromagnetic system.
  • Figure 11 is a side view of the isolated electromagnetic system.
  • Figure 12 represents a jack at the moment it enters the electromagnetic system.
  • FIGS 1 and 2 the three polar systems are schematically represented: -A-, -B- and -C- with two different configurations: in figure 1 with the electromagnetic system interspersed and aligned with the retention systems; in figure 2 with the electromagnetic system interspersed and out of alignment of the retention systems.
  • Figure 3 shows an end of the jack -1- circulating on the system in the direction indicated by the arrow at a speed v (machine speed).
  • Fa is the magnetic force of the pole -A-
  • Fm is the force of the spring.
  • Line -2- is the value of the spring force.
  • the curve -3- is U-shaped since in the central zone -4- there is no polar faces and from this a decrease in magnetic field is derived.
  • the force curve -5- exerted by the electromagnetic system -B- on the jack is shown in the lower part of figure 3.
  • the sum of forces of the curves -3- and -5- is greater than the force of the spring along the entire system in such a way that in one of the states of the electromagnetic system the jack remains attached to it.
  • the jack is mechanically approached to the polar system -A- and is adhered to it by virtue of Fa> Fm.
  • the electromagnetic system keeps it adhered by virtue of Fs> Fm.
  • the jack follows and remains attached to the -C- system.
  • Fm separates the jack from the assembly and moves away from the system -C-.
  • the system -B- transmits the sample information to each of the jacks in such a way that on the system -C- there may be separate jacks and separate jacks. From these two mechanical positions a cam system can take the needles through two different paths.
  • Figure 4 shows the trajectory described by a jack if it has been selected (Fs system canceled).
  • the point -6- where the line -2- and the curve -3- intersect is where the spring begins to be effective in accelerating the jack and starting the path -7-.
  • the system starts retention -C- there are magnetic forces that slow the movement of the jack in the normal direction to the pole.
  • Figure 4 shows another curve -9- that would describe the jack, circulating the jack at a speed v greater.
  • the separation H reached is less at a higher speed.
  • the curve -10- represents the path of a jack that has not reached sufficient distance H and has been attracted again by the pole.
  • the relationship between the force of attraction of the pole on a jack and its distance from the polar face will be called the reach of the pole.
  • the efficiency of the system and the speed attainable with the machine depend greatly on this parameter.
  • Polar systems The polar systems and the electromagnetic system will be described in greater detail below.
  • Polar systems The polar systems and the electromagnetic system will be described in greater detail below.
  • the retention system is formed by an even number of permanent magnets -11- adjacent each of them presenting one of its polar faces to jack -1- and the other to a common ferromagnetic base -12-.
  • Figure 7 shows the pole arrangement of an embodiment with four magnets where it is seen that each of them is inverted with respect to its neighbors.
  • Figure 6 shows the two retention systems -A- and -C- with the resulting polar arrangements.
  • the significant decrease in retention force is due to the preferential directionality of the magnetic fields of the magnets since each of them sees the nearest opposite polar face in the lower and upper magnet of its own system against the face of the same polarity of the adjacent magnet of the other system.
  • Figure 9 shows a typical arrangement applicable to a rectilinear knitting machine in which there are three polar systems -A'-, -A "- and -A"'- and two electromagnetic systems -C- and -C "-.
  • the selection of jack -1 '- can be carried out in two different places from which the cams can take the needle to two different working positions.
  • the electromagnetic system is represented in figures 10, 11 and 12.
  • Figure 10 is a normal view of the polar faces where the electromagnetic system between the retention systems A and C is drawn for guidance.
  • Figure 11 is a side view of the isolated electromagnetic system where the polar pieces -16- and -17- of ferromagnetic material are seen separated by a permanent magnet -18-.
  • Each of the polar pieces is wrapped by two windings or coils.
  • the two coils -21- closest to the magnet -18- are part of an electric power circuit capable of circulating the electric current necessary to counteract the magnetic flux that circulates through the polar pieces.
  • the two coils -22- are part of an electronic circuit capable of detecting the electric currents induced by the magnetic flux changes that occur in the polar pieces.

Abstract

The invention relates to a device that is used for selecting needles in circular knitting machines. The inventive device makes use of three basic polar systems, namely: a preparative magnetic retention system, an electromagnetic system which makes the selection and a retention system for the mechanical selection. Said selection is based on the opposing forces produced between the magnetic attraction forces of the three polar systems on one face of the jack and a spring associated with said jack.

Description

DISPOSITIVO PARA LA SELECCIÓN DE AGUJAS EN M&QUINAS-CJ^CΠLABES DE GÉNERO DE PUNTΩ DEVICE FOR THE SELECTION OF NEEDLES IN M & QUINAS-CJ ^ PΠΩ GENDER CABLES
MEMORIA DE¿CRIPTiy_AMEMORY OF ¿CRIPTiy_A
La presente invención se refiere a un dispositivo para la selección de las agujas en máquinas circulares de género de punto mediante el cual se consiguen características nuevas y ventajosas con respecto a lo actualmente conocido.The present invention relates to a device for the selection of needles in circular knitting machines by which new and advantageous characteristics are achieved with respect to what is currently known.
Como es sabido, existen básicamente dos clases de sistemas de selección. Los sistemas multinivel y los sistemas mononivel . En los sistemas multinivel el actuador tiene diversos sistemas de selección que actúan sobre los elementos a seleccionar de forma escalonada, así para un tiempo de actuación de cada uno de los sistemas dado se aumenta la velocidad de la máquina aumentando el número de niveles. En los sistemas mononivel se actúa directamente sobre los elementos a seleccionar. Obviamente los sistemas mononivel tienen la ventaja de la economía frente a los multiniveles . También presentan ventajas de aplicación por ocupar espacios más reducidos. La principal desventaja de los sistemas mononivel estriba en la mayor precisión general del sistema al actuar sobre cada uno de los elementos. Especial dificultad representa sincronizar la señal de actuación con la posición del actuar respecto al elemento a seleccionar.As is known, there are basically two kinds of selection systems. Multilevel systems and single level systems. In multilevel systems, the actuator has several selection systems that act on the elements to be selected in a staggered way, so for a time of action of each of the given systems the speed of the machine is increased by increasing the number of levels. In single-level systems, the elements to be selected are operated directly. Obviously, single-level systems have the advantage of the economy over multilevels. They also have advantages of application for occupying smaller spaces. The main disadvantage of single-level systems is the greater overall accuracy of the system when acting on each of the elements. Special difficulty represents synchronizing the action signal with the position of the action with respect to the element to be selected.
La presente invención está destinada a dar a conocer un dispositivo de selección que presenta ventajas de funcionamiento tanto por la optimización de las fuerzas magnéticas en la zona de discriminación de la selección mediante una disposición multipolar y autocontrol de la posición de sincronismo del electroimán respecto al elemento a seleccionar.The present invention is intended to disclose a selection device that has operating advantages both by optimizing the magnetic forces in the area of discrimination of the selection through a multipolar arrangement and self-control of the synchronization position of the electromagnet with respect to the element to be selected.
Por lo tanto, la presente invención se refiere a un dispositivo destinado a transmitir a las agujas de una máquina de género de punto circular la información de la muestra a tejer mediante la actuación sobre los llamados jacks que conducen las agujas.Therefore, the present invention relates to a device intended to transmit to the needles of a circular knitting machine the information of the sample to be knitted by acting on the so-called jacks that drive the needles.
El dispositivo comprende tres sistemas polares básicos: un sistema de retención magnético de preparación, un sistema electromagnético para efectuar la selección y un sistema de retención para la selección mecánica.The device comprises three basic polar systems: a preparation magnetic retention system, an electromagnetic system for making the selection and a retention system for the mechanical selection.
La capacidad selectiva del dispositivo se basa en la oposición de fuerzas que se produce entre la fuerza de atracción magnética que ejercen los tres sistemas polares sobre una cara del jack y un muelle asociado a éste.The selective capacity of the device is based on the opposition of forces that occur between the force of magnetic attraction exerted by the three polar systems on a face of the jack and a spring associated with it.
Para su mejor comprensión se adjuntan, a título de ejemplo explicativo pero no limitativo, unos dibujos relativos al dispositivo objeto de la presente invención.For better understanding, some drawings relating to the device object of the present invention are attached by way of explanatory but not limitative example.
La figura 1 muestra esquemáticamente la disposición de los sistemas polares con el sistema electromagnético intercalado.Figure 1 schematically shows the arrangement of polar systems with the interleaved electromagnetic system.
La figura 2 muestra esquemáticamente los sistemas polares con el sistema electromagnético intercalado pero fuera de la alineación de los sistemas de retención.Figure 2 schematically shows the polar systems with the interspersed electromagnetic system but outside the alignment of the retention systems.
La figura 3 muestra esquemáticamente la posición relativa de un extremo de un jack con respecto a los sistemas polares.Figure 3 schematically shows the relative position of one end of a jack with respect to polar systems.
Las figuras 4 y 5 muestran esquemáticamente la trayectoria descrita por un jack seleccionado con diferentes puntos de inicio del movimiento del jack.Figures 4 and 5 schematically show the path described by a jack selected with different starting points of the jack movement.
Las figuras 6 y 7 muestran esquemáticamente la realización de las masas polares con diferentes disposiciones de imanes.Figures 6 and 7 schematically show the realization of polar masses with different magnet arrangements.
En la figura 8 se representan esquemáticamente curvas características de una realización bipolar y dos realizaciones multipolares .Figure 8 shows schematically characteristic curves of a bipolar embodiment and two multipolar embodiments.
En la figura 9 se representa una disposición aplicable a una máquina de género de punto rectilínea.Figure 9 shows an arrangement applicable to a rectilinear knitting machine.
La figura 10 es una vista normal a las caras polares representando el sistema electromagnético.Figure 10 is a normal view of the polar faces representing the electromagnetic system.
La figura 11 es una vista lateral del sistema electromagnético aislado.Figure 11 is a side view of the isolated electromagnetic system.
La figura 12 representa un jack en el momento en el que entra en el sistema electromagnético.Figure 12 represents a jack at the moment it enters the electromagnetic system.
En las figuras 1 y 2 se representan esquemáticamente los tres sistemas polares: -A-, -B- y -C- con dos configuraciones distintas: en la figura 1 con el sistema electromagnético intercalado y alineado con los sistemas de retención; en la figura 2 con el sistema electromagnético intercalado y fuera de la alineación de los sistemas de retención.In figures 1 and 2 the three polar systems are schematically represented: -A-, -B- and -C- with two different configurations: in figure 1 with the electromagnetic system interspersed and aligned with the retention systems; in figure 2 with the electromagnetic system interspersed and out of alignment of the retention systems.
En la figura 3 se representa un extremo del jack -1- circulando sobre el sistema en la dirección indicada por la flecha a una velocidad v (velocidad de la máquina) . Sobre el jack hay dos fuerzas opuestas; Fa es la fuerza magnética del polo -A- ; Fm es la fuerza del muelle. En la misma figura se representan las dos curvas de fuerzas que se ejercen sobre el jack en función de la posición. La recta -2- es el valor de la fuerza del muelle. La curva -3- tiene forma de U ya que en la zona central -4- no hay caras polares y de ello se deriva una disminución de campo magnético .Figure 3 shows an end of the jack -1- circulating on the system in the direction indicated by the arrow at a speed v (machine speed). On the jack there are two opposing forces; Fa is the magnetic force of the pole -A-; Fm is the force of the spring. The same figure shows the two curves of forces that are exerted on the jack depending on the position. Line -2- is the value of the spring force. The curve -3- is U-shaped since in the central zone -4- there is no polar faces and from this a decrease in magnetic field is derived.
En la parte inferior de la figura 3 se representa la curva de fuerzas -5- que ejerce el sistema electromagnético -B- sobre el jack. La suma de fuerzas de las curvas -3- y -5- es superior a la fuerza del muelle a lo largo de todo el sistema de tal manera que en uno de los estados del sistema electromagnético el jack permanece adherido a él.The force curve -5- exerted by the electromagnetic system -B- on the jack is shown in the lower part of figure 3. The sum of forces of the curves -3- and -5- is greater than the force of the spring along the entire system in such a way that in one of the states of the electromagnetic system the jack remains attached to it.
La secuencia de funcionamiento es la siguiente:The sequence of operation is as follows:
El jack es acercado por medios mecánicos al sistema polar -A- y queda adherido a éste en virtud de que Fa>Fm. Cuando el jack llega a la zona -B- el sistema electromagnético lo mantiene adherido en virtud de Fs>Fm. El jack sigue y permanece adherido al sistema -C- . En caso de que el sistema electromagnético -B- haya cancelado el valor Fs en la magnitud suficiente, Fm separa el jack del conjunto y se aleja del sistema -C- . El sistema -B- transmite la información de la muestra a cada uno de los jacks de tal manera que sobre el sistema -C- puede haber jacks adheridos y jacks separados. A partir de estas dos posiciones mecánicas un sistema de levas puede llevar a las agujas por dos trayectorias distintas.The jack is mechanically approached to the polar system -A- and is adhered to it by virtue of Fa> Fm. When the jack reaches the zone -B- the electromagnetic system keeps it adhered by virtue of Fs> Fm. The jack follows and remains attached to the -C- system. In case the electromagnetic system -B- has canceled the value Fs in sufficient magnitude, Fm separates the jack from the assembly and moves away from the system -C-. The system -B- transmits the sample information to each of the jacks in such a way that on the system -C- there may be separate jacks and separate jacks. From these two mechanical positions a cam system can take the needles through two different paths.
Los parámetros básicos para el funcionamiento son los siguientes:The basic parameters for operation are as follows:
En la figura 4 se representa la trayectoria que describe un jack en el caso de que haya sido seleccionado (sistema Fs cancelado) . El punto -6- donde se cruzan la recta -2- y la curva -3- es donde el muelle empieza a ser efectivo para acelerar el jack y empezar la trayectoria -7-. En la ordenada -8- donde empieza el sistema de retención -C- existen fuerzas magnéticas que frenan el movimiento del jack en la dirección normal al polo. En la figura 4 se representa otra curva -9- que describiría el jack, circulando el jack a una velocidad v mayor. En la ordenada -8- la separación H alcanzada es menor a mayor velocidad. La curva -10- representa la trayectoria de un jack que no ha alcanzado la distancia H suficiente y ha sido atraído de nuevo por el polo. A la relación que hay entre la fuerza de atracción del polo sobre un jack y la distancia de este a la cara polar le llamaremos alcance del polo. La eficiencia del sistema y la velocidad alcanzable con la máquina dependen en gran manera de este parámetro.Figure 4 shows the trajectory described by a jack if it has been selected (Fs system canceled). The point -6- where the line -2- and the curve -3- intersect is where the spring begins to be effective in accelerating the jack and starting the path -7-. In the ordinate -8- where the system starts retention -C- there are magnetic forces that slow the movement of the jack in the normal direction to the pole. Figure 4 shows another curve -9- that would describe the jack, circulating the jack at a speed v greater. In the ordinate -8- the separation H reached is less at a higher speed. The curve -10- represents the path of a jack that has not reached sufficient distance H and has been attracted again by the pole. The relationship between the force of attraction of the pole on a jack and its distance from the polar face will be called the reach of the pole. The efficiency of the system and the speed attainable with the machine depend greatly on this parameter.
En la figura 5 se representa una secuencia parecida pero con la diferencia de que el punto de inicio del movimiento del jack está atrasado con relación a la coordenada -6- de la figura superior. Este atraso existirá en caso de que la señal eléctrica para cancelar la fuerza Fs llegue con retraso. El efecto que se produce sobre la trayectoria equivale a disminuir la cota H para una misma velocidad del sistema. Por tanto la precisión con la que se transmita la señal eléctrica al sistema -C- relacionando la posición física del jack con el propio sistema -C- es otro parámetro importante del sistema.A similar sequence is shown in Figure 5 but with the difference that the starting point of the jack's movement is late in relation to the coordinate -6- of the upper figure. This delay will exist in case the electrical signal to cancel the force Fs arrives late. The effect that occurs on the trajectory is equivalent to decreasing the H level for the same system speed. Therefore the precision with which the electrical signal is transmitted to the system -C- relating the physical position of the jack with the system -C- is another important parameter of the system.
A continuación se describirán en mayor detalle los sistemas polares y el sistema electromagnético. Sistemas polares:The polar systems and the electromagnetic system will be described in greater detail below. Polar systems:
El sistema de retención está formado por un número par de imanes permanentes -11- adyacentes presentando cada uno de ellos una de sus caras polares al jack -1- y la otra a una base ferromagnética común -12-. En la figura 7 se representa la disposición de polos de una realización con cuatro imanes donde se ve que cada uno de ellos está invertido respecto a sus vecinos. En la figura 6 se representan los dos sistemas de retención -A- y -C- con las disposiciones polares resultantes. En la separación -4- que hay entre sistemas polares la disminución importante de fuerza de retención es debida a la direccionalidad preferente de los campos magnéticos de los imanes ya que cada uno de ellos ve la cara polar opuesta más cercana en el imán inferior y superior de su propio sistema contra la cara de la misma polaridad del imán contiguo del otro sistema.The retention system is formed by an even number of permanent magnets -11- adjacent each of them presenting one of its polar faces to jack -1- and the other to a common ferromagnetic base -12-. Figure 7 shows the pole arrangement of an embodiment with four magnets where it is seen that each of them is inverted with respect to its neighbors. Figure 6 shows the two retention systems -A- and -C- with the resulting polar arrangements. In the separation -4- that there is between polar systems the significant decrease in retention force is due to the preferential directionality of the magnetic fields of the magnets since each of them sees the nearest opposite polar face in the lower and upper magnet of its own system against the face of the same polarity of the adjacent magnet of the other system.
En la figura 8 se representan las curvas características del parámetro "alcance" de una realización bipolar -13- y de dos realizaciones multipolares -14- y -15-. Para una altura w concreta, la fuerza de atracción sobre el jack cuando está adherido al sistema polar es prácticamente la misma en todas las realizaciones ya que la superficie magnética es la misma. Sin embargo a medida que aumenta la separación entre el jack y los imanes la fuerza de atracción disminuye más rápidamente en la disposición -15- que en la -13- tal como se representa en las curvas F-x, lo que permite con una realización de este tipo alcanzar velocidades de selección más altas en la disposición -15- que en la -13-. Para una separación H del jack alcanzada según la trayectoria descrita en la figura 3, el sistema multipolar ejerce sobre el jack una fuerza notablemente inferior que la del sistema bipolar.The characteristic curves of the "scope" parameter of a bipolar embodiment -13- and of two multipolar embodiments -14- and -15- are shown in Figure 8. For a concrete height w, the force of attraction on the jack when attached to the polar system is practically the same in all embodiments since the magnetic surface is the same. However, as the separation between the jack and the magnets increases, the attractive force decreases more rapidly in the arrangement -15- than in the -13- as represented in the Fx curves, which allows an embodiment of this type reach higher selection speeds in the arrangement -15- than in the -13-. For a separation H of the jack reached according to the path described in Figure 3, the multipolar system exerts a markedly lower force on the jack than that of the bipolar system.
Ventajas adicionales que se derivan de la simetría del sistema son la posibilidad de seleccionar jacks en ambos sentidos de marcha y la posibilidad de colocar diversos sistemas consecutivos . En la figura 9 se representa una disposición típica aplicable a una máquina de género de punto rectilínea en la que hay tres sistemas polares -A'-, -A"- y -A"'- y dos sistemas electromagnéticos -C- y -C"-. La selección del jack -1 '- se puede efectuar en dos sitios distintos a partir de los cuales las levas pueden llevar a la aguja a dos posiciones de trabajo diferente. Sistema electromagnéticoAdditional advantages that derive from the symmetry of the system are the possibility of selecting jacks in both directions of travel and the possibility of place various consecutive systems. Figure 9 shows a typical arrangement applicable to a rectilinear knitting machine in which there are three polar systems -A'-, -A "- and -A"'- and two electromagnetic systems -C- and -C "-. The selection of jack -1 '- can be carried out in two different places from which the cams can take the needle to two different working positions. Electromagnetic system
Se representa el sistema electromagnético en las figuras 10, 11 y 12.The electromagnetic system is represented in figures 10, 11 and 12.
La figura 10 es una vista normal a las caras polares donde a título orientativo se dibujo el sistema electromagnético entre los sistemas de retención A y C.Figure 10 is a normal view of the polar faces where the electromagnetic system between the retention systems A and C is drawn for guidance.
La figura 11 es una vista lateral del sistema electromagnético aislado donde se ven las piezas polares -16- y -17- de material ferromagnético separadas por un imán permanente -18-. Las dos caras polares que definen las piezas -16-, -17- en sus extremos -19- y -20- se enfrentan a la superficie de atracción del jack.Figure 11 is a side view of the isolated electromagnetic system where the polar pieces -16- and -17- of ferromagnetic material are seen separated by a permanent magnet -18-. The two polar faces that define the pieces -16-, -17- at their ends -19- and -20- face the attraction surface of the jack.
Cada una de las piezas polares está envuelta por dos arrollamientos o bobinas. Las dos bobinas -21- más cercanas al imán -18- forman parte de un circuito eléctrico de alimentación capaz de hacer circular la corriente eléctrica necesaria para contrarrestar el flujo magnético que circula por las piezas polares. Las dos bobinas -22- forman parte de un circuito electrónico capaz de detectar las corrientes eléctricas inducidas por los cambios de flujo magnético que se producen en las piezas polares .Each of the polar pieces is wrapped by two windings or coils. The two coils -21- closest to the magnet -18- are part of an electric power circuit capable of circulating the electric current necessary to counteract the magnetic flux that circulates through the polar pieces. The two coils -22- are part of an electronic circuit capable of detecting the electric currents induced by the magnetic flux changes that occur in the polar pieces.
En ausencia de jack frente a las caras polares el circuito magnético se cierra por las diferentes regiones del aire que envuelve el sistema. Con la presencia del jack en las caras polares hay una importante variación de la reluctancia del circuito en virtud del material ferromagnético del que está hecho el jack y un aumento del flujo que circula por el interior de las bobinas -21- y -22-. Un adecuado circuito electrónico puede detectar las corrientes eléctricas inducidas en las bobinas -22- y relacionar el valor de dichas corrientes con la posición relativa del jack respecto al sistema electromagnético. En la figura 12 se representa a un jack en el momento en que "entra" en el sistema electromagnético, posición en la que puede ser detectado por el circuito de las bobinas -22-. A partir de esta señal se puede actuar sobre el circuito de las bobinas -21- para seleccionar o no el jack según convenga por la muestra. De esta forma el propio sistema electromagnético determina la posición óptima de actuación a efectos de conseguir la mayor velocidad posible por los efectos cinemáticos descritos en la figura 5. In the absence of jack facing the polar faces The magnetic circuit is closed by the different regions of the air that surrounds the system. With the presence of the jack on the polar faces there is an important variation in the reluctance of the circuit by virtue of the ferromagnetic material from which the jack is made and an increase in the flow that circulates inside the coils -21- and -22-. A suitable electronic circuit can detect the electrical currents induced in the coils -22- and relate the value of said currents to the relative position of the jack with respect to the electromagnetic system. Figure 12 shows a jack at the moment it "enters" the electromagnetic system, a position where it can be detected by the circuit of the coils -22-. From this signal, it is possible to act on the circuit of the coils -21- to select or not select the jack as required by the sample. In this way, the electromagnetic system itself determines the optimal position of action in order to achieve the highest possible speed due to the kinematic effects described in Figure 5.

Claims

RK[ 1I]3ΩIΩΑΩIΩEES. RK [1I] 3ΩIΩΑΩIΩEES.
1.- Dispositivo para la selección de agujas en máquinas circulares de género de punto, para transmitir a las agujas de una máquina de género de punto la información de la muestra a tejer mediante la actuación sobre los jacks intermedios de conducción de las agujas, caracterizado por disponer tres sistemas polares básicos, a saber, un sistema de retención magnético de preparación, un sistema electromagnético para efectuar la selección y un sistema de retención para la selección mecánica, basándose la selección en la oposición de fuerzas que se produce entre la fuerza de atracción magnética de los tres sistemas polares sobre una cara del jack y un muelle asociado a éste.1.- Device for the selection of needles in circular knitting machines, to transmit to the needles of a knitting machine the information of the sample to be knitted by acting on the intermediate driving jacks of the needles, characterized by having three basic polar systems, namely a magnetic retention system for preparation, an electromagnetic system for making the selection and a retention system for mechanical selection, based on the selection in the opposition of forces that occurs between the force of magnetic attraction of the three polar systems on a jack face and a spring associated with it.
2.- Dispositivo para la selección de agujas en máquinas circulares de género de punto, según la reivindicación 1 , caracterizado porque el jack es acercado por medios mecánicos al primer sistema polar quedando adherido a éste si la fuerza de atracción es mayor que la fuerza de un resorte antagonista, manteniéndose adherido en la zona del sistema electromagnético de selección o separado del mismo según la fuerza de atracción graduable del sistema electromagnético, permitiendo la eventual separación del jack y alejamiento del sistema polar de retención para el envío de las agujas, mediante un sistema de levas por dos trayectorias distintas.2. Device for the selection of needles in circular knitting machines, according to claim 1, characterized in that the jack is mechanically approached to the first polar system being adhered thereto if the force of attraction is greater than the force of an antagonistic spring, remaining adhered in the area of the electromagnetic system of selection or separated from it according to the adjustable force of attraction of the electromagnetic system, allowing the eventual separation of the jack and removal of the polar retention system for sending the needles, by means of a Cam system by two different paths.
3.- Dispositivo para la selección de agujas en máquinas circulares de género de punto, según la reivindicación 2, caracterizado porque el sistema electromagnético de preparación transmite la información de la muestra a tejer a cada uno de los jacks, permitiendo que sobre el sistema polar de retención puedan haber jacks adheridos y jacks separados.3. Device for the selection of needles in circular knitting machines, according to claim 2, characterized in that the electromagnetic preparation system transmits the information of the sample to be knitted to each of the jacks, allowing that on the polar retention system there may be separate jacks and separate jacks.
4.- Dispositivo para la selección de agujas en máquinas circulares de género de punto, según la reivindicación 1 , caracterizado porque la disposición de los sistemas polares es simétrica con respecto al sistema electromagnético de selección.4. Device for the selection of needles in circular knitting machines, according to claim 1, characterized in that the arrangement of the polar systems is symmetrical with respect to the electromagnetic selection system.
5.- Dispositivo para la selección de agujas en máquinas circulares de género de punto, según la reivindicación 1 , caracterizado porque el sistema polar de retención está formado por un número par de imanes permanentes cada uno de los cuales presenta una de sus caras al jack y la otra a una base ferromagnética común.5. Device for the selection of needles in circular knitting machines, according to claim 1, characterized in that the polar retention system is formed by an even number of permanent magnets each of which has one of its faces to the jack and the other to a common ferromagnetic base.
6.- Dispositivo para la selección de agujas en máquinas circulares de género de punto, según las reivindicaciones anteriores, caracterizado porque el dispositivo tiene capacidad de seleccionar jacks en ambos sentidos de marcha y de colocar diversos sistemas consecutivos .6. Device for the selection of needles in circular knitting machines, according to the preceding claims, characterized in that the device has the ability to select jacks in both directions of travel and place various consecutive systems.
7.- Dispositivo para la selección de agujas en máquinas circulares de género de punto, según la reivindicación 1 , caracterizado porque el sistema electromagnético comprende piezas polares de material ferromagnético separadas por un imán permanente, quedando las caras polares de dichas piezas polares enfrentadas en sus extremos a la superficie de atracción del jack.7. Device for the selection of needles in circular knitting machines, according to claim 1, characterized in that the electromagnetic system comprises polar pieces of ferromagnetic material separated by a permanent magnet, the polar faces of said polar parts remaining facing each other. ends to the jack's attraction surface.
8.- Dispositivo para la selección de agujas en máquinas circulares de género de punto, según la reivindicación 6, caracterizado porque cada una de las piezas polares está envuelta por dos arrollamientos o bobinas . 8. Device for the selection of needles in circular knitting machines, according to claim 6, characterized in that each of the polar pieces is wrapped by two windings or coils.
9.- Dispositivo para la selección de agujas en máquinas circulares de género de punto, según las reivindicaciones 6 y 7, caracterizado porque las bobinas más próximas al imán forman parte de un circuito eléctrico de alimentación capaz de hacer circular corriente eléctrica para contrarrestar el flujo magnético que circula por las piezas polares.9. Device for the selection of needles in circular knitting machines, according to claims 6 and 7, characterized in that the coils closest to the magnet are part of an electric power circuit capable of circulating electric current to counteract the flow magnetic circulating through the polar pieces.
10.- Dispositivo para la selección de agujas en máquinas circulares de género de punto, según las reivindicaciones anteriores, caracterizado porque dos de las bobinas de las piezas polares del sistema electromagnético forman parte de un circuito electrónico capaz de detectar las corrientes eléctricas inducidas por los cambios de flujo magnético en las piezas polares.10. Device for the selection of needles in circular knitting machines, according to the preceding claims, characterized in that two of the coils of the polar parts of the electromagnetic system are part of an electronic circuit capable of detecting the electric currents induced by the magnetic flux changes in the polar pieces.
11.- Dispositivo para la selección de agujas en máquinas circulares de género de punto, según las reivindicaciones anteriores, caracterizado por la disposición de un circuito electrónico para detectar las corrientes eléctricas inducidas en las bobinas de detección eléctrica relacionando dichas corrientes con la posición del jack respecto al sistema electromagnético. 11. Device for the selection of needles in circular knitting machines, according to the preceding claims, characterized by the provision of an electronic circuit to detect the electric currents induced in the electric detection coils relating said currents to the position of the jack regarding the electromagnetic system.
PCT/ES2002/000418 2001-09-05 2002-09-05 Device for selecting needles in circular knitting machines WO2003021022A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR10-2004-7003346A KR20040035755A (en) 2001-09-05 2002-09-05 Device for selecting needles in circular knitting machines
EP02772412A EP1433884A1 (en) 2001-09-05 2002-09-05 Device for selecting needles in circular knitting machines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200102008A ES2187369B1 (en) 2001-09-05 2001-09-05 DEVICE FOR THE SELECTION OF NEEDLES IN CIRCULAR MACHINES OF GENERO DE PUNTO.
ES200102008 2001-09-05

Publications (1)

Publication Number Publication Date
WO2003021022A1 true WO2003021022A1 (en) 2003-03-13

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Application Number Title Priority Date Filing Date
PCT/ES2002/000418 WO2003021022A1 (en) 2001-09-05 2002-09-05 Device for selecting needles in circular knitting machines

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EP (1) EP1433884A1 (en)
KR (1) KR20040035755A (en)
CN (1) CN1551936A (en)
ES (1) ES2187369B1 (en)
WO (1) WO2003021022A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBS20130172A1 (en) * 2013-11-21 2015-05-22 Santoni & C Spa CONTROL DEVICE FOR A TEXTILE MACHINE
CN113862888B (en) * 2021-11-12 2023-03-21 杭州富阳富顺针织电脑有限公司 Needle selector for knitting and using method
CN115262071B (en) * 2022-07-21 2023-06-23 武汉纺织大学 High-speed magnetic suspension knitting needle array control system and control method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715198A (en) * 1986-04-26 1987-12-29 H. Stoll Gmbh & Co. Control magnet assembly for a pattern apparatus in knitting machines for electrically controlled needle selection
ES2023283B3 (en) * 1989-01-10 1992-01-01 Savio Spa NEEDLE SELECTION DEVICE IN KNITTING MACHINE, CIRCULAR PARTICULARLY FOR LADIES SOCKS
EP0474195A2 (en) * 1990-09-05 1992-03-11 HARTING ELEKTRONIK GmbH Selectionmagnet
US5560228A (en) * 1992-08-03 1996-10-01 Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg Textile machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715198A (en) * 1986-04-26 1987-12-29 H. Stoll Gmbh & Co. Control magnet assembly for a pattern apparatus in knitting machines for electrically controlled needle selection
ES2023283B3 (en) * 1989-01-10 1992-01-01 Savio Spa NEEDLE SELECTION DEVICE IN KNITTING MACHINE, CIRCULAR PARTICULARLY FOR LADIES SOCKS
EP0474195A2 (en) * 1990-09-05 1992-03-11 HARTING ELEKTRONIK GmbH Selectionmagnet
US5560228A (en) * 1992-08-03 1996-10-01 Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg Textile machine

Also Published As

Publication number Publication date
KR20040035755A (en) 2004-04-29
ES2187369A1 (en) 2003-06-01
EP1433884A1 (en) 2004-06-30
CN1551936A (en) 2004-12-01
ES2187369B1 (en) 2004-09-16

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