WO2008034917A1 - Device for detecting obstacles in drives - Google Patents

Device for detecting obstacles in drives Download PDF

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Publication number
WO2008034917A1
WO2008034917A1 PCT/ES2006/000524 ES2006000524W WO2008034917A1 WO 2008034917 A1 WO2008034917 A1 WO 2008034917A1 ES 2006000524 W ES2006000524 W ES 2006000524W WO 2008034917 A1 WO2008034917 A1 WO 2008034917A1
Authority
WO
WIPO (PCT)
Prior art keywords
latch
output shaft
contact
input shaft
head
Prior art date
Application number
PCT/ES2006/000524
Other languages
Spanish (es)
French (fr)
Inventor
Francisco LUJAN SÁNCHEZ
Original Assignee
Lujan Sanchez Francisco
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 Lujan Sanchez Francisco filed Critical Lujan Sanchez Francisco
Priority to PCT/ES2006/000524 priority Critical patent/WO2008034917A1/en
Publication of WO2008034917A1 publication Critical patent/WO2008034917A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/88—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for limiting unrolling
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/41—Detection by monitoring transmitted force or torque; Safety couplings with activation dependent upon torque or force, e.g. slip couplings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/106—Application of doors, windows, wings or fittings thereof for buildings or parts thereof for garages

Definitions

  • the present invention relates to a mechanical device capable of detecting the presence of physical objects that constitute an obstacle to the movement of any electrically actuated element. It is of special application to the drives of doors, blinds and closures.
  • the device of the invention amply meets this last condition because when working based on the principle of passive resistance it can be incorporated directly into the motor axis of the electric drive, without requiring additional installation elements in the closing assembly itself.
  • the obstacle detector of the invention is based on electrically monitoring the relative position of a freely rotating latch that travels loosely between a head of the input shaft and a contact bushing attached to the output shaft.
  • retention means related to both the output shaft and the outer, fixed housing of the device are used. This comprises an input shaft attached to the motor, and an output shaft attached to the closing device to be protected, both axes being aligned thanks to a centering axis arranged between them.
  • Both the input shaft and the output shaft have two circular sector-shaped heads between which a free latch can be easily moved. In this way there is a drag between the different elements both in the closing maneuver and in the opening maneuver.
  • the latch and the output shaft, the latter through an auxiliary contact socket materialize a detection switch, so that when they approach each other they close an external electrical circuit capable of activating a relay that causes the inversion of the direction of rotation of the electric drive motor.
  • Both mobile elements of the detection switch, the latch and the contact socket are related to the external electrical circuit, fixed, thanks to two concentric circular conductive tracks.
  • retention means are provided that ensure that once a relative displacement of the latch has occurred, as a consequence of the detection of an obstacle, this it will remain in its new relative position until the end of the maneuver cycle.
  • the aforementioned retention means preferably consist of a fastener that relates to the latch by means of magnets, with the output shaft by means of a freewheel bearing and with the outer, fixed housing, by means of a plurality of loaded balls with springs
  • the output shaft rotates under the action of the weight of the closing device itself with a speed marked by the input shaft, since their respective heads support one another.
  • the latch remains supported on the head of the input shaft and electrically separated from the contact bushing, which remains attached to the output shaft.
  • the relative positions of the latch and the input and output axes are the same, and the detection switch materialized by the latch and the contact bush remains open .
  • the device encounters an obstacle in its path, the output shaft and its associated contact bushing will be stopped, against which the latch pushed by the input shaft head will rest. .
  • the external electrical circuit closes, activating a relay that reverses the direction of rotation of the drive motor.
  • the detection switch it is essential that the detection switch be kept closed, that is, the latch must remain supported on the contact bushing, which is ensured by means of the latch retention means that relate this to the output shaft and the outer housing.
  • the latch will separate from the contact bushing thanks to the freewheel bearing that relates it to the output shaft, producing a new relative movement between them, which opens the external electrical circuit.
  • Figure 1 shows a longitudinal section of the device of the invention.
  • Figure 2 shows a schematic partial longitudinal section through the latch, showing its relationship with the retention bracket.
  • Figure 3 shows a schematic partial longitudinal section through the axle heads.
  • Figure 4 shows a perspective view of the input terminal with the external electrical circuit.
  • Figure 5 shows a perspective view of the entrance strip with the conductive tracks that ensure the electrical contact.
  • Figure 6 shows a perspective view of the axis and input beam.
  • Figure 7 shows a perspective view of the latch.
  • Figure 8 shows a perspective view of the output shaft.
  • Figure 9 shows a perspective view of the output shaft with the latch and the fixing bracket mounted thereon.
  • Figure 10 shows a perspective view of the assembly formed by the latch mounted on the beam and the input shaft.
  • Figure 11 shows a section along the line Xl-Xl of Figure 1, during the closing movement.
  • Figure 12 shows the same section of Figure 11 during the opening movement.
  • Figure 13 shows the same section of Figure 11 when an obstacle appears during the closing maneuver.
  • Figure 14 shows the same section of Figure 11 during the inversion of the movement subsequent to the detection of an obstacle.
  • the numerical references correspond to the following parts and elements.
  • the device of the invention is located in the same tube (1) that houses the drive motor, from which it receives movement through an input shaft (2) that rotates freely in a It contains an input (3) that on one side receives the external electrical circuit (4) and on the other it has two tracks, concentric and conductive circular, an inner track (5) and an outer track (6).
  • a centering shaft (7) In the center of the input shaft (2) there is a centering shaft (7), which allows you to perfectly align an output shaft (8), supported by bearings (9) in an outer housing (10) integral with the tube (1) . See figure 1.
  • the latch (11) is located, with rotating clearance, between an input shaft head (19) and a contact bushing (21) attached to the output shaft (8) with interposition of a bushing insulator (22), arranged in a housing of the contact bush (21) a second contact (23) loaded by a second spring (24) in such a way that it rests on the outer race (6).
  • the output shaft (8) also has, in correspondence with the input shaft head (19), an output shaft head (25).
  • the operation of the device is as follows. During the closing maneuver, the output shaft (8) tends to move spontaneously due to the weight of the closing device itself, so that the head of the output shaft (25) will be retained by the head of the input shaft (19) moving both with a speed determined by the latter.
  • the latch (11) is dragged, in turn, by the head of the input shaft (19) against the resistance caused by the balls (17) of the retention member (15) when pressing the outer housing (10), fixed .
  • the head of the input shaft (19) drags the head of the output shaft (25) against the action of the weight of the closing device.
  • the freewheel bearing (16) works in the blocking direction and, consequently, the latch (11) is in turn dragged by the retainer (15), maintaining the separation between the latch (11) and the contact bushing. (twenty-one). See figure 12. If during a closing maneuver, the device encounters an obstacle in its path, the head of the output shaft head (25) will be stopped. However, the head of the input shaft (19) will continue to move and drag the latch (11) until it rests on the contact bushing (21), closing the detection switch of the external electrical circuit (4). The relative movement that occurs between the latch (11) and the contact bushing (21) is possible thanks to the sliding of the magnets (14) on the retention stop (15). See figure 13.
  • the closing of the detection switch causes the activation of a relay that reverses the direction of travel, so that the closing maneuver is transformed into a maneuver of opening.
  • the head of the input shaft (19) drags the head of the output shaft (25) and the latch (11) that remains supported on the contact bushing (21). Note the differences in the position of the latch (11) between a normal opening maneuver (figure 12) and an opening maneuver subsequent to the detection of an obstacle (figure 14). In this way, the closing of the detection switch is assured until the end of the opening maneuver, in which a limit switch releases the auxiliary relay.
  • the overall effect is that opening and closing maneuvers can be performed in the usual way, but if an obstacle is encountered during a closing maneuver, the automatic reversal of the direction of movement will occur.
  • the detection device of the invention is based on monitoring the relative position of a latch (11) retained by frictional forces.
  • the set constitutes a virtual detection switch. It is evident that if the different elements are metallic, we must insulate both the latch (11) and the contact bushing (21), which is achieved by means of a latch insulator (20) and a bushing insulator (22).
  • the input count (3) and its contact tracks (5) (6) are only intended to transmit the electrical situation of the mobile elements to the external, fixed electrical circuit.
  • the contacts (12) (23) are magnetized, in order to ensure electrical continuity with the tracks (5) (6), which greatly improves the reliability of the device by suppressing possible mechanical bounces induced by the springs (13) (24).

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

It is based on electrically monitoring the relative position of a freely rotatable latch (11) which is moved, with play, between a head of an input shaft (19) and a contact bushing (21) connected to an output shaft (8). In order to predetermine the position of this latch (11), use is made of retention means comprising a retention ferrule (15) which is connected to the latch (11) by means of magnets (14), to the output shaft (8) by means of a freewheeling bearing (16) and to a fixed outer casing (10) by means of a plurality of balls (17) with springs (18).

Description

DETECTOR DE OBSTÁCULOS EN ACCIONAMIENTOS DETECTOR OF OBSTACLES IN DRIVES
La presente invención se refiere a un dispositivo mecánico capaz de detectar Ia presencia de objetos físicos que constituyan un obstáculo al movimiento de cualquier elemento accionado eléctricamente. Es de especial aplicación a los accionamientos de puertas, persianas y cierres.The present invention relates to a mechanical device capable of detecting the presence of physical objects that constitute an obstacle to the movement of any electrically actuated element. It is of special application to the drives of doors, blinds and closures.
La presencia de un obstáculo imprevisto en Ia trayectoria de cualquier elemento de cierre puede tener consecuencias no deseadas tanto para el accionamiento eléctrico (sobreesfuerzo mecánico) como para el propio obstáculo (lesiones, si se trata de una persona). Con objeto de mejorar Ia seguridad de estos dispositivos, se conocen distintos elementos detectores que van desde Ia interrupción de un rayo de luz hasta Ia incorporación de perfiles elásticos huecos con un fluido en su interior. Estos sistemas de detección son caros y de fiabilidad dudosa. Sería conveniente, en consecuencia, el poder disponer de un detector fiable y económico, que pudiera además incorporarse fácilmente a cualquier instalación existente.The presence of an unforeseen obstacle in the trajectory of any closing element may have undesirable consequences both for the electric drive (mechanical overexertion) and for the obstacle itself (injuries, if it is a person). In order to improve the safety of these devices, different sensing elements are known ranging from the interruption of a light beam to the incorporation of hollow elastic profiles with a fluid inside. These detection systems are expensive and of doubtful reliability. It would be convenient, therefore, to have a reliable and economical detector, which could also be easily incorporated into any existing installation.
El dispositivo de Ia invención cumple sobradamente esta última condición ya que al trabajar basado en el principio de resistencia pasiva puede incorporarse directamente en el eje motor del accionamiento eléctrico, sin precisar de elementos adicionales de instalación en el propio conjunto de cierre.The device of the invention amply meets this last condition because when working based on the principle of passive resistance it can be incorporated directly into the motor axis of the electric drive, without requiring additional installation elements in the closing assembly itself.
El detector de obstáculos de Ia invención se basa en vigilar, eléctricamente, Ia posición relativa de un pestillo libremente giratorio que se desplaza con holgura entre una cabeza del eje de entrada y un casquillo de contacto unido al eje de salida. Con objeto de predeterminar Ia posición de este pestillo se utilizan medios de retención relacionados tanto con el eje de salida como con la carcasa exterior, fija, del dispositivo. Este, comprende un eje de entrada unido al motor, y un eje de salida unido al dispositivo de cierre que se desea proteger, estando ambos ejes alineados gracias a un eje centrador dispuesto entre ambos. Tanto el eje de entrada como el eje de salida presentan sendas cabezas con forma de sector circular entre las que puede desplazarse, con holgura, un pestillo libre. De esta forma se produce un arrastre entre los distintos elementos tanto en Ia maniobra de cierre como en Ia maniobra de apertura. El pestillo y el eje de salida, este último a través de un casquillo auxiliar de contacto, materializan un interruptor de detección, de tal manera que cuando se aproximan entre ellos cierran un circuito eléctrico externo susceptible de activar un relé que provoca Ia inversión del sentido de giro del motor eléctrico de accionamiento. Ambos elementos móviles del interruptor de detección, el pestillo y el casquillo de contacto, se relacionan con el circuito eléctrico externo, fijo, gracias a dos pistas conductoras circulares concéntricas.The obstacle detector of the invention is based on electrically monitoring the relative position of a freely rotating latch that travels loosely between a head of the input shaft and a contact bushing attached to the output shaft. In order to predetermine the position of this latch, retention means related to both the output shaft and the outer, fixed housing of the device are used. This comprises an input shaft attached to the motor, and an output shaft attached to the closing device to be protected, both axes being aligned thanks to a centering axis arranged between them. Both the input shaft and the output shaft have two circular sector-shaped heads between which a free latch can be easily moved. In this way there is a drag between the different elements both in the closing maneuver and in the opening maneuver. The latch and the output shaft, the latter through an auxiliary contact socket, materialize a detection switch, so that when they approach each other they close an external electrical circuit capable of activating a relay that causes the inversion of the direction of rotation of the electric drive motor. Both mobile elements of the detection switch, the latch and the contact socket, are related to the external electrical circuit, fixed, thanks to two concentric circular conductive tracks.
Con objeto de que el pestillo no oscile libremente en su alojamiento entre las cabezas de los ejes de entrada y de salida se prevén medios de retención que aseguran que una vez producido un desplazamiento relativo del pestillo, como consecuencia de Ia detección de un obstáculo, este permanecerá en su nueva posición relativa hasta Ia finalización del ciclo de maniobra. Los medios de retención citados consisten preferentemente en una contera de fijación que se relaciona con el pestillo por medio de imanes, con el eje de salida por medio de un rodamiento de rueda libre y con Ia carcasa exterior, fija, mediante una pluralidad de bolas cargadas con resortes.In order that the latch does not swing freely in its housing between the heads of the input and output shafts, retention means are provided that ensure that once a relative displacement of the latch has occurred, as a consequence of the detection of an obstacle, this it will remain in its new relative position until the end of the maneuver cycle. The aforementioned retention means preferably consist of a fastener that relates to the latch by means of magnets, with the output shaft by means of a freewheel bearing and with the outer, fixed housing, by means of a plurality of loaded balls with springs
De esta manera durante Ia maniobra de cierre el eje de salida gira bajo Ia acción del propio peso del dispositivo de cierre con una velocidad marcada por el eje de entrada, ya que sus respectivas cabezas apoyan una contara Ia otra. En esta maniobra el pestillo permanece apoyado en Ia cabeza del eje de entrada y separado eléctricamente del casquillo de contacto, que permanece unido al eje de salida.Thus, during the closing maneuver, the output shaft rotates under the action of the weight of the closing device itself with a speed marked by the input shaft, since their respective heads support one another. In this maneuver the latch remains supported on the head of the input shaft and electrically separated from the contact bushing, which remains attached to the output shaft.
Durante Ia maniobra de apertura, y siempre que el cierre previo se haya realizado sin incidentes, las posiciones relativas del pestillo y los ejes de entrada y salida son las mismas, y el interruptor de detección materializado por el pestillo y el casquillo de contacto permanece abierto.During the opening maneuver, and provided that the previous closing has been carried out without incident, the relative positions of the latch and the input and output axes are the same, and the detection switch materialized by the latch and the contact bush remains open .
Ahora bien, si durante Ia maniobra de cierre el dispositivo encuentra un obstáculo en su camino, se producirá Ia detención del eje de salida y de su casquillo de contacto asociado, contra el que vendrá a apoyarse el pestillo empujado por Ia cabeza del eje de entrada. En ese momento se cierra el circuito eléctrico externo, activándose un relé que invierte el sentido del giro del motor de accionamiento. Durante Ia maniobra de apertura desencadenada es imprescindible que el interruptor de detección se mantenga cerrado, es decir el pestillo debe permanecer apoyado en el casquillo de contacto, Io que se asegura mediante los medios de retención del pestillo que relacionan a este con el eje de salida y con Ia carcasa exterior. Al comienzo de Ia maniobra de cierre siguiente el pestillo se separara del casquillo de contacto gracias al cojinete de rueda libre que Io relaciona con el eje de salida, produciéndose un nuevo movimiento relativo entre ambos, Io que abre el circuito eléctrico externo.However, if during the closing maneuver the device encounters an obstacle in its path, the output shaft and its associated contact bushing will be stopped, against which the latch pushed by the input shaft head will rest. . At that time the external electrical circuit closes, activating a relay that reverses the direction of rotation of the drive motor. During the unlocking opening maneuver it is essential that the detection switch be kept closed, that is, the latch must remain supported on the contact bushing, which is ensured by means of the latch retention means that relate this to the output shaft and the outer housing. At the beginning of the next closing maneuver, the latch will separate from the contact bushing thanks to the freewheel bearing that relates it to the output shaft, producing a new relative movement between them, which opens the external electrical circuit.
Para complementar Ia descripción que antecede y con objeto de ayudar a una mejor comprensión de las características de Ia invención, se va a realizar una descripción detallada de una realización preferida en base a un juego de dibujos que se acompañan a esta memoria descriptiva y en donde con carácter meramente orientativo y no limitativo se ha representado los siguiente:To complement the above description and in order to help a better understanding of the characteristics of the invention, a detailed description of a preferred embodiment will be made based on a set of drawings that accompany this descriptive memory and where For the purposes of guidance only and not limitation, the following have been represented:
La figura 1 muestra una sección longitudinal del dispositivo de Ia invención.Figure 1 shows a longitudinal section of the device of the invention.
La figura 2 muestra una sección longitudinal parcial esquemática por el pestillo, apreciándose su relación con Ia contera de retención.Figure 2 shows a schematic partial longitudinal section through the latch, showing its relationship with the retention bracket.
La figura 3 muestra una sección longitudinal parcial esquemática por las cabezas de los ejes.Figure 3 shows a schematic partial longitudinal section through the axle heads.
La figura 4 muestra una vista en perspectiva de Ia contera de entrada con el circuito eléctrico externo.Figure 4 shows a perspective view of the input terminal with the external electrical circuit.
La figura 5 muestra una vista en perspectiva de Ia contera de entrada con las pistas conductoras que aseguran el contacto eléctrico. La figura 6 muestra una vista en perspectiva del eje y contera de entrada.Figure 5 shows a perspective view of the entrance strip with the conductive tracks that ensure the electrical contact. Figure 6 shows a perspective view of the axis and input beam.
La figura 7 muestra una vista en perspectiva del pestillo.Figure 7 shows a perspective view of the latch.
La figura 8 muestra una vista en perspectiva del eje de salida.Figure 8 shows a perspective view of the output shaft.
La figura 9 muestra una vista en perspectiva del eje de salida con el pestillo y Ia contera de fijación montados sobre el mismo. La figura 10 muestra una vista en perspectiva del conjunto formado por el pestillo montado sobre Ia contera y el eje de entrada.Figure 9 shows a perspective view of the output shaft with the latch and the fixing bracket mounted thereon. Figure 10 shows a perspective view of the assembly formed by the latch mounted on the beam and the input shaft.
La figura 11 muestra una sección por Ia línea Xl-Xl de Ia figura 1 , durante el movimiento de cierre.Figure 11 shows a section along the line Xl-Xl of Figure 1, during the closing movement.
La figura 12 muestra Ia misma sección de la figura 11 durante el movimiento de apertura.Figure 12 shows the same section of Figure 11 during the opening movement.
La figura13 muestra Ia misma sección de Ia figura 11 cuando aparece un obstáculo durante Ia maniobra de cierre.Figure 13 shows the same section of Figure 11 when an obstacle appears during the closing maneuver.
La figura 14 muestra Ia misma sección de Ia figura 11 durante Ia inversión del movimiento subsiguiente a Ia detección de un obstáculo. En dichas figuras las referencias numéricas corresponden a las siguientes partes y elementos.Figure 14 shows the same section of Figure 11 during the inversion of the movement subsequent to the detection of an obstacle. In these figures the numerical references correspond to the following parts and elements.
1. Tubo1. Tube
2. Eje de entrada 3. Contera de entrada2. Input axis 3. Input input
4. Circuito eléctrico externo4. External electrical circuit
5. Pista interior5. Inner track
6. Pista exterior6. Outside track
7. Eje centrador 8. Eje de salida7. Centering axis 8. Output shaft
9. Cojinetes9. Bearings
10. Carcasa exterior del detector10. External housing of the detector
11. Pestillo11. latch
12. Primer contacto 13. Primer resorte12. First contact 13. First spring
14. Imanes14. Magnets
15. Contera de retención15. Contera withholding
16. Rodamiento de rueda libre16. Freewheel bearing
17. Bolas 18. Resortes de bolas17. Balls 18. Ball springs
19. Cabeza de eje de entrada19. Input shaft head
20. Aislador de pestillo20. Latch isolator
21. Casquillo de contacto21. Contact bush
22. Aislador de casquillo 23. Segundo contacto22. Bushing insulator 23. Second contact
24. Segundo resorte24. Second spring
25. Cabeza de eje de salida25. Output shaft head
Como puede apreciarse en las figuras 1 a 10 el dispositivo de Ia invención se ubica en el mismo tubo (1) que aloja el motor de accionamiento, del cual recibe el movimiento a través de un eje de entrada (2) que gira libremente en una contera de entrada (3) que por un lado recibe el circuito eléctrico externo (4) y por el otro presenta dos pistas, circulares concéntricas y conductoras, una pista interior (5) y una pista exterior (6). En el centro del eje de entrada (2) se dispone un eje centrador (7), que permite alinear perfectamente un eje de salida (8), soportado por cojinetes (9) en una carcasa exterior (10) solidaria del tubo (1). Ver figura 1.As can be seen in Figures 1 to 10, the device of the invention is located in the same tube (1) that houses the drive motor, from which it receives movement through an input shaft (2) that rotates freely in a It contains an input (3) that on one side receives the external electrical circuit (4) and on the other it has two tracks, concentric and conductive circular, an inner track (5) and an outer track (6). In the center of the input shaft (2) there is a centering shaft (7), which allows you to perfectly align an output shaft (8), supported by bearings (9) in an outer housing (10) integral with the tube (1) . See figure 1.
Libremente giratorio sobre el eje de salida (8) se dispone, a su vez, un pestillo (11 ) que en un alojamiento de su cara anterior presenta un primer contactoFreely rotatable on the output shaft (8), in turn, there is a latch (11) that has a first contact in a housing of its front face
(12) cargado por un primer resorte (13) de tal manera que apoye en Ia pista interior (5), mientras que en su perímetro exterior se alojan varios imanes (14) que se relacionan con una contera de retención (15). Esta, de aspecto general cilindrico, se apoya en el eje de salida (8) por intermedio de un rodamiento de rueda libre (16), mientras que en su periferia presenta una pluralidad de bolas (17) que presionan contra Ia carcasa exterior (10) gracias a Ia acción de resortes de bola (18). Ver figura 1 y 2.(12) loaded by a first spring (13) in such a way that it rests on the inner race (5), while on its outer perimeter several magnets (14) are housed that are related to a retention bead (15). This, of general cylindrical appearance, rests on the output shaft (8) by means of a freewheel bearing (16), while on its periphery it presents a plurality of balls (17) that press against the outer casing (10 ) thanks to the action of ball springs (18). See figure 1 and 2.
El pestillo (11) se ubica, con holgura giratoria, entre una cabeza de eje de entrada (19) y un casquillo de contacto (21) unido al eje de salida (8) con interposición de un aislador de casquillo (22), disponiéndose en un alojamiento del casquillo de contacto (21) un segundo contacto (23) cargado por un segundo resorte (24) de tal manera que apoya en Ia pista exterior (6). El eje de salida (8) presenta asimismo, en correspondencia con Ia cabeza del eje de entrada (19), una cabeza de eje de salida (25). El funcionamiento del dispositivo es el siguiente. Durante Ia maniobra de cierre, el eje de salida (8) tiende a moverse espontáneamente debido al peso del propio dispositivo de cierre, con Io que Ia cabeza del eje de salida (25) quedará retenida por Ia cabeza del eje de entrada (19) moviéndose ambas con una velocidad determinada por esta última. El pestillo (11) es arrastrado, a su vez, por Ia cabeza del eje de entrada (19) contra Ia resistencia provocada por las bolas (17) de Ia contera de retención (15) al presionar Ia carcasa exterior (10), fija. El interruptor de detección materializado por el pestillo (11) y el casquillo de contactoThe latch (11) is located, with rotating clearance, between an input shaft head (19) and a contact bushing (21) attached to the output shaft (8) with interposition of a bushing insulator (22), arranged in a housing of the contact bush (21) a second contact (23) loaded by a second spring (24) in such a way that it rests on the outer race (6). The output shaft (8) also has, in correspondence with the input shaft head (19), an output shaft head (25). The operation of the device is as follows. During the closing maneuver, the output shaft (8) tends to move spontaneously due to the weight of the closing device itself, so that the head of the output shaft (25) will be retained by the head of the input shaft (19) moving both with a speed determined by the latter. The latch (11) is dragged, in turn, by the head of the input shaft (19) against the resistance caused by the balls (17) of the retention member (15) when pressing the outer housing (10), fixed . The detection switch materialized by the latch (11) and the contact socket
(21) permanece abierto, ya que ambos elementos están separados. Ver figura 11.(21) remains open, since both elements are separated. See figure 11.
Durante Ia maniobra de apertura, Ia cabeza del eje de entrada (19) arrastra a Ia cabeza del eje de salida (25) contra Ia acción del peso del dispositivo de cierre.During the opening maneuver, the head of the input shaft (19) drags the head of the output shaft (25) against the action of the weight of the closing device.
El rodamiento de rueda libre (16) trabaja en Ia dirección de bloqueo y en consecuencia el pestillo (11) es arrastrado a su vez por Ia contera de retención (15), manteniéndose Ia separación entre el pestillo (11) y el casquillo de contacto (21). Ver figura 12. Si durante una maniobra de cierre, el dispositivo encuentra un obstáculo en su camino, se producirá Ia detención de Ia cabeza del eje de salida (25). Sin embargo, Ia cabeza del eje de entrada (19) continuara moviéndose y arrastrará al pestillo (11) hasta que este apoye sobre el casquillo de contacto (21), cerrando el interruptor de detección del circuito eléctrico externo (4). El movimiento relativo que se produce entre el pestillo (11) y el casquillo de contacto (21) es posible gracias al deslizamiento de los imanes (14) sobre Ia contera de retención (15). Ver figura 13.The freewheel bearing (16) works in the blocking direction and, consequently, the latch (11) is in turn dragged by the retainer (15), maintaining the separation between the latch (11) and the contact bushing. (twenty-one). See figure 12. If during a closing maneuver, the device encounters an obstacle in its path, the head of the output shaft head (25) will be stopped. However, the head of the input shaft (19) will continue to move and drag the latch (11) until it rests on the contact bushing (21), closing the detection switch of the external electrical circuit (4). The relative movement that occurs between the latch (11) and the contact bushing (21) is possible thanks to the sliding of the magnets (14) on the retention stop (15). See figure 13.
El cierre del interruptor de detección, formado por el pestillo (11) y el casquillo de contacto (21), provoca Ia activación de un relé que invierte el sentido de Ia marcha, por Io que Ia maniobra de cierre se transforma en una maniobra de apertura. La cabeza del eje de entrada (19) arrastra a Ia cabeza del eje de salida (25) y al pestillo (11) que permanece apoyado en el casquillo de contacto (21). Obsérvense las diferencias de posición del pestillo (11) entre una maniobra de apertura normal (figura 12) y una maniobra de apertura subsiguiente a Ia detección de un obstáculo (figura 14). De esta forma se asegura el cierre del interruptor de detección hasta el final de Ia maniobra de apertura, en el cual un interruptor de fin de carrera libera el relé auxiliar.The closing of the detection switch, formed by the latch (11) and the contact socket (21), causes the activation of a relay that reverses the direction of travel, so that the closing maneuver is transformed into a maneuver of opening. The head of the input shaft (19) drags the head of the output shaft (25) and the latch (11) that remains supported on the contact bushing (21). Note the differences in the position of the latch (11) between a normal opening maneuver (figure 12) and an opening maneuver subsequent to the detection of an obstacle (figure 14). In this way, the closing of the detection switch is assured until the end of the opening maneuver, in which a limit switch releases the auxiliary relay.
Si desde Ia posición indicada en Ia figura 14 iniciamos ahora una maniobra de cierre, el pestillo permanecerá inmóvil inicialmente gracias a que el rodamiento de rueda libre trabaja en el sentido de liberación, llegara un momento en que Ia cabeza del eje de entrada (19) apoye sobre el pestillo (11) y Io arrastre en Ia posición que se muestra en Ia figura 11.If from the position indicated in Figure 14 we now initiate a closing maneuver, the latch will remain immobile initially thanks to the freewheel bearing working in the direction of release, there will come a time when the head of the input shaft (19) rest on the latch (11) and drag it in the position shown in figure 11.
El efecto global es que se podrán realizar maniobras de apertura y cierre en Ia forma acostumbrada, pero si durante una maniobra de cierre se encuentra un obstáculo se producirá Ia inversión automática del sentido del movimiento.The overall effect is that opening and closing maneuvers can be performed in the usual way, but if an obstacle is encountered during a closing maneuver, the automatic reversal of the direction of movement will occur.
Obsérvese que el dispositivo detector de Ia invención se basa en el seguimiento de Ia posición relativa de un pestillo (11) retenido por fuerzas de fricción. El conjunto constituye un interruptor de detección virtual. Es evidente que si los distintos elementos son metálicos deberemos aislar tanto el pestillo (11) como el casquillo de contacto (21 ) Io que se consigue mediante un aislador de pestillo (20) y un aislador de casquillo (22). La contera de entrada (3) y sus pistas (5) (6) de contacto solo tienen por objeto transmitir Ia situación eléctrica de los elementos móviles al circuito eléctrico externo, fijo. En una ejecución preferente, los contactos (12) (23) están imantados, con objeto de asegurar Ia continuidad eléctrica con las pistas (5) (6), Io que mejora grandemente Ia fiabilidad del dispositivo al suprimir posibles rebotes mecánicos inducidos por los resortes (13) (24).Note that the detection device of the invention is based on monitoring the relative position of a latch (11) retained by frictional forces. The set constitutes a virtual detection switch. It is evident that if the different elements are metallic, we must insulate both the latch (11) and the contact bushing (21), which is achieved by means of a latch insulator (20) and a bushing insulator (22). The input count (3) and its contact tracks (5) (6) are only intended to transmit the electrical situation of the mobile elements to the external, fixed electrical circuit. In a preferred embodiment, the contacts (12) (23) are magnetized, in order to ensure electrical continuity with the tracks (5) (6), which greatly improves the reliability of the device by suppressing possible mechanical bounces induced by the springs (13) (24).
Para conseguir Ia mayor claridad en Ia descripción del dispositivo de Ia invención se han omitido el resto de elementos mecánicos y eléctricos del accionamiento, que serán sobradamente conocidos por el experto en la materia. To achieve greater clarity in the description of the device of the invention, the rest of the mechanical and electrical elements of the drive have been omitted, which will be well known to those skilled in the art.

Claims

Reivindicaciones Claims
1. Detector de obstáculos en accionamientos, caracterizado por comprender;1. Obstacle detector in drives, characterized by understanding;
- un eje de entrada (2), que presenta una cabeza de eje de entrada (19), y que gira libremente en una contera de entrada (3) Ia cual recibe por un lado un circuito eléctrico externo (4) y por el otro presenta una pista interior (5) y una pista exterior (6), circulares concéntricas y conductoras, un eje de salida (8), soportado por cojinetes (9) en una carcasa exterior (10), el cual presenta una cabeza de eje de salida (25),- an input shaft (2), which has an input shaft head (19), and which rotates freely in an input tip (3) which receives on the one hand an external electrical circuit (4) and on the other it has an inner race (5) and an outer race (6), concentric and conductive circular, an output shaft (8), supported by bearings (9) in an outer housing (10), which has an axle head output (25),
- un casquillo de contacto (21) unido al eje de salida (8) a través de un aislador de casquillo (22), y que presenta en un alojamiento un segundo contacto (23) cargado por un segundo resorte (24), de tal manera que apoye en Ia pista exterior (6), - un pestillo (11 ), montado libremente giratorio sobre el eje de salida (8) por intermedio de un aislador de pestillo (20), dispuesto con holgura entre Ia cabeza del eje de entrada (19) y el casquillo de contacto (21), que en un alojamiento de su cara anterior presenta un primer contacto (12) cargado por un primer resorte (13), de tal manera que apoye en Ia pista interior (5),- a contact bushing (21) connected to the output shaft (8) through a bushing insulator (22), and having in a housing a second contact (23) loaded by a second spring (24), of such so that it rests on the outer race (6), - a latch (11), freely mounted rotatably on the output shaft (8) by means of a latch isolator (20), disposed loosely between the head of the input shaft (19) and the contact bushing (21), which in a housing of its front face has a first contact (12) loaded by a first spring (13), so that it rests on the inner race (5),
- medios de retención del pestillo (11), consistentes en una contera de retención (15), de aspecto general cilindrico, que se apoya en el eje de salida (8) por intermedio de un rodamiento de rueda libre (16), mientras que en su periferia presenta una pluralidad de bolas (17) que presionan contra Ia carcasa exterior (10), gracias a Ia acción de resortes de bola- latch retaining means (11), consisting of a retainer (15), generally cylindrical in shape, which is supported on the output shaft (8) by means of a freewheel bearing (16), while in its periphery it presents a plurality of balls (17) that press against the outer casing (10), thanks to the action of ball springs
(18),(18),
- varios imanes (14), alojados en el perímetro exterior del pestillo (11), y que apoyan en Ia contera de retención (15).- several magnets (14), housed in the outer perimeter of the latch (11), and which rest on the retention bracket (15).
2. Detector de obstáculos en accionamientos de acuerdo con Ia reivindicación 1 , caracterizado por comprender un eje centrador (7) que, alojado en el centro del eje de entrada (2) se aloja asimismo en el centro del eje de salida (8). 2. Obstacle detector in drives according to claim 1, characterized by comprising a centering axis (7) which, housed in the center of the input shaft (2) is also housed in the center of the output shaft (8).
3. Detector de obstáculos en accionamientos de acuerdo con Ia reivindicación 1, caracterizado por que los contactos (12) (23) están imantados. 3. Obstacle detector in drives according to claim 1, characterized in that the contacts (12) (23) are magnetized.
PCT/ES2006/000524 2006-09-20 2006-09-20 Device for detecting obstacles in drives WO2008034917A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/ES2006/000524 WO2008034917A1 (en) 2006-09-20 2006-09-20 Device for detecting obstacles in drives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2006/000524 WO2008034917A1 (en) 2006-09-20 2006-09-20 Device for detecting obstacles in drives

Publications (1)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4438903A (en) * 1982-05-07 1984-03-27 Pierre Gagnon Obstacle detector for a descending or ascending load
US4881018A (en) * 1987-12-18 1989-11-14 Nippondenso Co., Ltd. Manually assistable electric driving device
ES2085601T3 (en) * 1991-01-14 1996-06-01 Simu SAFETY MECHANISM FOR LOCKING DEVICES WITH ELECTRIC CONTROL OF ROLLING BLINDS AND THE LIKE.
US5749173A (en) * 1996-02-29 1998-05-12 Aisin Seiki Kabushiki Kaisha Power window regulator apparatus
US6392374B1 (en) * 1998-02-10 2002-05-21 Somfy Device for control of an electric motor driving a moving object

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4438903A (en) * 1982-05-07 1984-03-27 Pierre Gagnon Obstacle detector for a descending or ascending load
US4881018A (en) * 1987-12-18 1989-11-14 Nippondenso Co., Ltd. Manually assistable electric driving device
ES2085601T3 (en) * 1991-01-14 1996-06-01 Simu SAFETY MECHANISM FOR LOCKING DEVICES WITH ELECTRIC CONTROL OF ROLLING BLINDS AND THE LIKE.
US5749173A (en) * 1996-02-29 1998-05-12 Aisin Seiki Kabushiki Kaisha Power window regulator apparatus
US6392374B1 (en) * 1998-02-10 2002-05-21 Somfy Device for control of an electric motor driving a moving object

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