EP3493886B1 - Scenery manoeuvring apparatus - Google Patents

Scenery manoeuvring apparatus Download PDF

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Publication number
EP3493886B1
EP3493886B1 EP17746505.1A EP17746505A EP3493886B1 EP 3493886 B1 EP3493886 B1 EP 3493886B1 EP 17746505 A EP17746505 A EP 17746505A EP 3493886 B1 EP3493886 B1 EP 3493886B1
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EP
European Patent Office
Prior art keywords
carriage
electric motor
reference member
relative
sensor
Prior art date
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Application number
EP17746505.1A
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German (de)
French (fr)
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EP3493886A1 (en
Inventor
Mathieu Leclercq
Alexandre DECHAMP
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Huchez Treuils
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Huchez Treuils
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Publication of EP3493886A1 publication Critical patent/EP3493886A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63J—DEVICES FOR THEATRES, CIRCUSES, OR THE LIKE; CONJURING APPLIANCES OR THE LIKE
    • A63J1/00—Stage arrangements
    • A63J1/02—Scenery; Curtains; Other decorations; Means for moving same
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63J—DEVICES FOR THEATRES, CIRCUSES, OR THE LIKE; CONJURING APPLIANCES OR THE LIKE
    • A63J1/00—Stage arrangements
    • A63J1/02—Scenery; Curtains; Other decorations; Means for moving same
    • A63J1/028—Means for moving hanging scenery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/02—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars

Definitions

  • the present invention relates to an apparatus for operating a load, more particularly although not exclusively, an apparatus for operating a theater set.
  • an operating device comprising an operating cord, the ends of which are fixed to a carriage connected to the load by a carrying cable.
  • the apparatus comprises several carrying cables having one end connected to the carriage and the opposite end connected at different points of a beam carrying the set.
  • counterweights fixed to the carriage and whose weight is equal to the weight of the load. This structure allows easy manual movement of the load by means of the operating cord.
  • the counterweights must be adapted accordingly so that the counterweights and the load have the same weight. This operation is painful and requires the presence of several people.
  • the document US 2011/042634 A1 discloses an apparatus for operating a load with respect to a load-bearing structure, the apparatus comprising a carrying cable having a first end connected to the load, and a second end connected to an operating member, the operating device comprising a motor electric carried by a carriage which is mounted movable relative to the support structure and which is configured to move relative to the support structure during a rotation of the motor.
  • the device includes an organ control associated with a displacement measuring member for controlling the rotation of the electric motor as a function of this displacement.
  • An object of the invention and to provide a device for maneuvering a load which is easily adaptable to a variation in the weight of the load while respecting the space available.
  • an apparatus for maneuvering a load with respect to a load-bearing structure comprising a load-bearing cable having a first end connected to the load, and a second end connected to an operating device.
  • the operating device comprises: an electric motor and a carriage which is mounted movable relative to the support structure and which is configured to move relative to the support structure during a rotation of the motor; a control cord having its two ends each connected to a point of attachment to the carriage by forming a loop around two pulleys mounted on the support structure; and a control member associated with a member for measuring the displacement of the attachment points relative to the carriage for controlling the rotation of the electric motor as a function of this displacement.
  • the electric motor comprises an output shaft carrying at least one motor pinion cooperating with a roller chain.
  • the apparatus includes return sprockets arranged on either side of the drive sprocket to apply the roller chain to the drive sprocket in a winding path.
  • the electric motor is carried by the carriage.
  • the electric motor acts as a counterweight.
  • the device has a counterweight additional carried by the trolley. With equal performance of the electric motor, the load capacity of the device is increased.
  • the personnel in charge of setting up the sets become familiar as quickly as possible with new material.
  • the structure of the apparatus is as close as possible to the structure of the prior apparatus, and that the effort to be provided for the operation of the decorations is as close as possible to the effort to be provided with previous materials.
  • the carriage is mounted mobile on a reference member comprising the attachment points, the control member of the electric motor emitting a control signal as a function of a relative position of the carriage and of the reference body.
  • the device comprises an elastic member fixed to the reference member on the one hand, and to the carriage on the other hand, and configured to bring the reference member and the carriage into a neutral position with respect to each other for which the control signal is zero.
  • the device comprises a sensor for detecting a relative position of the reference member and the carriage and controlling a rotation of the electric motor as a function of a signal delivered by the sensor.
  • the sensor is a sliding cursor potentiometer having a zero point in the middle of the cursor travel, and delivering opposite voltages on either side of the zero point.
  • the device comprises a switch with frank opening during a passage of the reference member and the carriage by the neutral position.
  • the displacement measuring member comprises a first angular position sensor associated with one of the two pulleys of the control cord, and a second angular position sensor associated with a return pulley of the carrying cable or to an output shaft of the electric motor to detect a relative position of the reference member and the carriage.
  • the displacement measuring member comprises a bidirectional strain gauge extending between a point of attachment of the control cord and the carriage.
  • the displacement measurement member comprises two deformation gauges each extending between one of the two attachment points of the control cord and the carriage.
  • the operating device comprises a reference member 1 comprising an upper plate 2 and a lower plate 3 connected to each other by tie rods 4.
  • a control cord 11 has one end connected to a point of attachment 2.1 of the upper plate 2 and an opposite end connected to a point of attachment 3.1 of the lower plate 3.
  • the cord control pass on a pulley 15 carried to rotate freely by cheeks 16 having holes 17 for attachment to the wall.
  • the lower pulley 15 may not be fixed to the wall so that the weight of said pulley exerts a tension on the operating cord 11.
  • the apparatus comprises an operating device comprising a carriage 5 mounted to slide relative to the reference member 1 by means of tubes 6 engaged on the tie rods.
  • the carriage 5 further comprises two plates 7 fixed to the tubes 6 on the side and on the other side of the plate 2, and two plates 8 fixed to the tubes 6 and supporting a counterweight 23.
  • the carriage 5 further comprises forks 9 engaged astride a guide rail 10 fixed to the wall.
  • the carriage comprises two studs 20, one on each face main carriage 5.
  • the maneuvering device comprises an electric motor 24 carried by the carriage 5 axially thereto (that is to say that the electric motor 24 has a rotor having an axis extending parallel to the sliding direction of the carriage 5).
  • the electric motor 24 is associated with a reduction unit 25 comprising an output shaft 26 extending perpendicular to the axis of the carriage 5 and having ends each carrying a drive pinion 27 on which a roller chain 28 is engaged. This makes it possible to '' balance the force to which the output shaft 26 is subjected.
  • the roller chain 28 is kept engaged on the drive pinion 27 along a sinuous path by idler sprockets 29. This makes it possible to distribute the force to which the drive pinion is subjected during its rotation by the motor 24 over several teeth.
  • Threaded rod sections 30 are fixed to the upper end of the roller chains 28.
  • the threaded rod sections 30 pass through the lower part of stirrups 44 fixed to the angle iron 13.
  • the roller chains 28 are tensioned by nuts 45 screwed onto the sections of threaded rod 30 and bearing on the lower part of the stirrups 44.
  • the roller chains 28 are fixed at their lower end, in a similar arrangement at the upper end, to a plate 31 fixed to the ground .
  • the angle iron 13, the plate 31, and the roller chains define a support structure.
  • a damper 31 is fixed to the reference member 1 on the one hand and to the carriage 5 on the other hand to dampen the relative movements of the reference member 1 and the carriage 5.
  • a counterweight 32 for balancing the weight of the reference member is mounted to slide on the body of the damper 31 and is held suspended by flexible links 33 fixed to the counterweight 32 on the one hand, and to the plate 3 on the other hand by passing over pulleys of return carried by the carriage 5.
  • the reference member 1 and the carriage 5 are brought back to a neutral position by an elastic member, here two helical springs 35 each carried by cups 36 engaged in the ends of the springs. Furthermore, the cups 36 bear on the edge of a window in the plate 2, and on the edge of an identical window in plates 34 which are integral with the plates 7 and which frame the plate 2 so that the springs 35 are put in compression whatever the direction of movement of the reference member and the carriage relative to each other.
  • an elastic member here two helical springs 35 each carried by cups 36 engaged in the ends of the springs.
  • the cups 36 bear on the edge of a window in the plate 2, and on the edge of an identical window in plates 34 which are integral with the plates 7 and which frame the plate 2 so that the springs 35 are put in compression whatever the direction of movement of the reference member and the carriage relative to each other.
  • the device further comprises an electronic unit associated with a linear potentiometer 37 fixed to one of the plates 34.
  • the potentiometer 37 has a neutral point at mid-stroke and reverse circuits on either side of the neutral point. It includes a slider 38 engaged in an opening 39 of a plate 40 fixed to the plate 2 of the reference member 1.
  • a switch 41 with frank opening is also mounted on the plate 34 of the carriage 5 and comprises a tilting operating rod 43 whose position is controlled by a fork 42 carried by the plate 2 of the reference member 1 and passing through a slot Plate 46 34.
  • the operating rod 43 is movable between a neutral position for which the switch 41 is open, and a tilted up or down position for which the switch 41 is closed.
  • a downward traction exerted on the front strand of the control cord 11 causes, due to the compression of the springs 35, a displacement towards the top of the reference member 1 with respect to the carriage 5.
  • the relative displacement between these two components is measured by the position of the cursor of the potentiometer 37, which triggers the rotation of the electric motor 24 in an upward direction of the 'carriage / reference unit assembly.
  • the signal delivered by the potentiometer 37 can in a manner known per se be interpreted as a positioning, speed, or acceleration instruction.
  • the setpoint used is preferably an acceleration setpoint which corresponds better to the prior mechanical devices.
  • the set point set in motion exists as long as the user exerts on the cord a force causing the compression of the springs 35.
  • the value of the set point is proportional to the force exerted.
  • the damper 31 makes it possible to prevent this return movement from being too violent and that it takes place with a rebound.
  • the figure 5 illustrates a second embodiment of the invention relating, as before, to a device for maneuvering a load with respect to a carrying structure.
  • the switching device illustrated in figure 5 is similar to that illustrated in figures 1 to 4 with the difference that the reference organ is here articulated.
  • the operating device thus comprises a reference member 101 comprising an upper plate 102 and a lower plate 103 which are connected to each other by a single tie rod 104 and are each connected to the carriage 105 by a pivot articulation 102.2, 103.2 so as to form a deformable parallelogram.
  • the upper plate 102 and the lower plate 103 have a mass behind their pivot points 102.2, 103.2 to balance their weight.
  • a control cord 111 has one end connected to an attachment point 102.1 of the upper plate 102 and an opposite end connected to an attachment point 103.1 of the upper plate 103.
  • the apparatus includes an operating device comprising the carriage 105 mounted to slide along the tie rod 104 of the reference member by means of a tube 106 engaged on said tie rod.
  • the device also includes an electric motor 124 carried by the carriage 105 arranged in an identical manner to the first embodiment described above.
  • a strain gauge 150 is mounted between the carriage and the tie rod 104 to measure the displacement relative rectilinear of the reference member and the carriage and thus control the rotation of the electric motor as a function of this displacement.
  • FIG 6 illustrates a third embodiment of the invention similar to the first embodiment illustrated in figures 1 to 4 , with the difference that the carriage carrying the electric motor is here mounted fixed relative to the reference member.
  • the operating device comprises a reference member 201 connected to one end of a control cord 211 by a first strain gauge 250 and connected to an opposite end of the control cord 211 by a second strain gauge 251.
  • a carriage 205 is mounted fixed relative to the reference member 201 and carries an electric motor 224.
  • a pull of the control cord 211 exerted downwards causes a deformation of the first strain gauge 250 which delivers a signal triggering the rotation of the electric motor 224 in a direction of ascent of the reference member / carriage assembly.
  • a pull of the control cord 211 exerted upwards causes a deformation of the second strain gauge 251 which delivers a signal triggering the rotation of the electric motor 224 in a direction of descent of the organ assembly. reference / cart.
  • the invention has been described in relation to the operation of a theater set, the invention applies to any device for operating a load.
  • the symmetrical operation of the force compensation offers the possibility of using a counterweight to increase the load capacity of the system.
  • the invention may include additional control means, in particular manual, and for example push buttons or a remote control.
  • additional control means may also include a computer unit controlling the engine according to a programmed sequence.
  • the relative displacement of the reference member and the carriage is measured by the cursor 38 of a potentiometer 37
  • it is also possible to determine this displacement by using for example, on the one hand, a first angular position sensor associated with one of the pulleys 15 of the control cord for measuring the displacement of the reference member and, on the other hand, a second angular position sensor associated with one of the pulleys of return 21, 22 of the carrying cable 18 or to the output shaft 26 of the electric motor to measure the displacement of the carriage 5.
  • a simple comparison of the measurements made by the first and the second angular position sensor makes it possible in fact to determine the displacement relative between the reference member and the carriage.
  • Another solution for measuring the relative displacement of the reference member and the carriage can also be to use a bidirectional strain gauge connecting the attachment point 2.1 of the control cord to the cart.
  • the sensor used to detect the displacement of the attachment points can be of any type allowing a measurement of relatively large displacements (as in the case of the displacement of the carriage relative to the reference member) or minute (such as the deformation of the part carrying the attachment points).
  • the sensor can be a digital sensor.
  • the sensor can be any force sensor providing an exploitable signal to control the engine.
  • the operating device is preferably a loop cord whose ends are fixed to the reference member, and the carriage is preferably driven by a chain which has ends fixed to the carriage to form a loop around idler gears and which meshes with an output pinion of the fixed motor.

Description

La présente invention concerne un appareil de manœuvre d'une charge, plus particulièrement bien que non exclusivement, un appareil de manœuvre d'un décor de théâtre.The present invention relates to an apparatus for operating a load, more particularly although not exclusively, an apparatus for operating a theater set.

ARRIÈRE-PLAN DE L'INVENTIONBACKGROUND OF THE INVENTION

On sait que, pour changer le décor dans un théâtre, il est habituel d'utiliser un appareil de manœuvre comportant un cordon de manœuvre dont les extrémités sont fixées à un chariot relié à la charge par un câble porteur. Dans le cas d'un décor de théâtre, l'appareil comporte plusieurs câbles porteurs ayant une extrémité reliée au chariot et l'extrémité opposée reliée en différents points d'une poutre portant le décor. Pour faciliter la manœuvre, il est connu d'utiliser des contrepoids fixés au chariot et dont le poids est égal au poids de la charge. Cette structure permet un déplacement manuel aisé de la charge au moyen du cordon de manœuvre. Toutefois, lorsqu'il est nécessaire de changer un décor ayant un poids donné, pour un autre décor ayant un poids différent du décor précédent, il faut adapter les contrepoids de façon correspondante afin que les contrepoids et la charge aient le même poids. Cette opération est pénible et requiert la présence de plusieurs personnes.We know that, to change the decor in a theater, it is usual to use an operating device comprising an operating cord, the ends of which are fixed to a carriage connected to the load by a carrying cable. In the case of a theater set, the apparatus comprises several carrying cables having one end connected to the carriage and the opposite end connected at different points of a beam carrying the set. To facilitate the maneuver, it is known to use counterweights fixed to the carriage and whose weight is equal to the weight of the load. This structure allows easy manual movement of the load by means of the operating cord. However, when it is necessary to change a decor having a given weight, for another decor having a different weight from the previous decor, the counterweights must be adapted accordingly so that the counterweights and the load have the same weight. This operation is painful and requires the presence of several people.

Pour éviter cet inconvénient, il est connu de remplacer le cordon de manœuvre et ses contrepoids par un moteur électrique fixé au sol. Toutefois, le poids d'un décor de théâtre peut être très élevé (jusqu'à 300 kg) de sorte que le remplacement des contrepoids par un moteur électrique implique l'utilisation d'un moteur électrique de grande dimension, généralement incompatible avec l'espace disponible, et d'un coût élevé.To avoid this drawback, it is known to replace the operating cord and its counterweights with an electric motor fixed to the ground. However, the weight of a stage set can be very high (up to 300 kg) so that the replacement of the counterweights by an electric motor involves the use of a large electric motor, generally incompatible with the available space, and a high cost.

Le document US 2011/042634 A1 divulgue un appareil de manœuvre d'une charge par rapport à une structure porteuse, l'appareil comprenant un câble porteur ayant une première extrémité reliée à la charge, et une seconde extrémité reliée à un organe de manœuvre, le dispositif de manœuvre comportant un moteur électrique porté par un chariot qui est monté mobile par rapport à la structure porteuse et qui est configuré pour se déplacer par rapport à la structure porteuse lors d'une rotation du moteur. Ledit document apparaît également divulguer que le dispositif comporte un organe de commande associé à un organe de mesure de déplacement pour commander la rotation du moteur électrique en fonction de ce déplacement.The document US 2011/042634 A1 discloses an apparatus for operating a load with respect to a load-bearing structure, the apparatus comprising a carrying cable having a first end connected to the load, and a second end connected to an operating member, the operating device comprising a motor electric carried by a carriage which is mounted movable relative to the support structure and which is configured to move relative to the support structure during a rotation of the motor. The said document also appears to disclose that the device includes an organ control associated with a displacement measuring member for controlling the rotation of the electric motor as a function of this displacement.

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

Un but de l'invention et de proposer un appareil de manœuvre d'une charge qui soit facilement adaptable à une variation du poids de la charge tout en respectant l'espace disponible.An object of the invention and to provide a device for maneuvering a load which is easily adaptable to a variation in the weight of the load while respecting the space available.

BRÈVE DESCRIPTION DE L'INVENTIONBRIEF DESCRIPTION OF THE INVENTION

En vue de la réalisation de ce but, on propose, selon l'invention, un appareil de manœuvre d'une charge par rapport à une structure porteuse, l'appareil comprenant un câble porteur ayant une première extrémité reliée à la charge, et une seconde extrémité reliée à un dispositif de manœuvre. Le dispositif de manœuvre comporte : un moteur électrique et un chariot qui est monté mobile par rapport à la structure porteuse et qui est configuré pour se déplacer par rapport à la structure porteuse lors d'une rotation du moteur ;un cordon de commande ayant ses deux extrémités reliées chacune à un point d'attache au chariot en formant une boucle autour de deux poulies montées sur la structure porteuse ; et un organe de commande associé à un organe de mesure de déplacement des points d'attache par rapport au chariot pour commander la rotation du moteur électrique en fonction de ce déplacement.With a view to achieving this aim, there is proposed, according to the invention, an apparatus for maneuvering a load with respect to a load-bearing structure, the apparatus comprising a load-bearing cable having a first end connected to the load, and a second end connected to an operating device. The operating device comprises: an electric motor and a carriage which is mounted movable relative to the support structure and which is configured to move relative to the support structure during a rotation of the motor; a control cord having its two ends each connected to a point of attachment to the carriage by forming a loop around two pulleys mounted on the support structure; and a control member associated with a member for measuring the displacement of the attachment points relative to the carriage for controlling the rotation of the electric motor as a function of this displacement.

Selon une version avantageuse de l'invention, le moteur électrique comporte un arbre de sortie portant au moins un pignon moteur coopérant avec une chaîne à rouleaux. De préférence encore, l'appareil comporte des pignons de renvoi disposés de part et d'autre du pignon moteur pour appliquer la chaîne à rouleaux sur le pignon moteur selon un trajet sinueux.According to an advantageous version of the invention, the electric motor comprises an output shaft carrying at least one motor pinion cooperating with a roller chain. More preferably, the apparatus includes return sprockets arranged on either side of the drive sprocket to apply the roller chain to the drive sprocket in a winding path.

Selon un mode de réalisation préféré de l'invention, le moteur électrique est porté par le chariot.According to a preferred embodiment of the invention, the electric motor is carried by the carriage.

Le moteur électrique, comme les autres éléments embarqués sur le chariot, fait office de contrepoids.The electric motor, like the other elements on board the cart, acts as a counterweight.

De préférence, l'appareil comporte un contrepoids additionnel porté par le chariot. A égalité de performances du moteur électrique, on augmente la capacité de charge de l'appareil.Preferably, the device has a counterweight additional carried by the trolley. With equal performance of the electric motor, the load capacity of the device is increased.

Par ailleurs, dans certains cas, en particulier dans le domaine du théâtre, il est préférable que le personnel chargé de mettre en place les décors se familiarise le plus rapidement possible avec un nouveau matériel. En particulier, il est souhaitable que la structure de l'appareil soit aussi proche que possible de la structure de l'appareil antérieur, et que l'effort à fournir pour la manœuvre des décors soit aussi proche que possible de l'effort à fournir avec les matériels antérieurs.In addition, in certain cases, in particular in the field of theater, it is preferable that the personnel in charge of setting up the sets become familiar as quickly as possible with new material. In particular, it is desirable that the structure of the apparatus is as close as possible to the structure of the prior apparatus, and that the effort to be provided for the operation of the decorations is as close as possible to the effort to be provided with previous materials.

Selon un autre aspect de l'invention, le chariot est monté mobile sur un organe de référence comprenant les points d'attache, l'organe de commande du moteur électrique émettant un signal de commande en fonction d'une position relative du chariot et de l'organe de référence.According to another aspect of the invention, the carriage is mounted mobile on a reference member comprising the attachment points, the control member of the electric motor emitting a control signal as a function of a relative position of the carriage and of the reference body.

Selon une version préférée de l'invention, l'appareil comporte un organe élastique fixé à l'organe de référence d'une part, et au chariot d'autre part, et configuré pour ramener l'organe de référence et le chariot dans une position neutre l'un par rapport à l'autre pour laquelle le signal de commande est nul.According to a preferred version of the invention, the device comprises an elastic member fixed to the reference member on the one hand, and to the carriage on the other hand, and configured to bring the reference member and the carriage into a neutral position with respect to each other for which the control signal is zero.

Selon un autre aspect avantageux de l'invention, l'appareil comporte un capteur pour détecter une position relative de l'organe de référence et du chariot et commander une rotation du moteur électrique en fonction d'un signal délivré par le capteur. De préférence, le capteur est un potentiomètre à curseur coulissant ayant un point zéro au milieu de la course du curseur, et délivrant des tensions opposées de part et d'autre du point zéro. De préférence encore, le dispositif comporte un interrupteur à ouverture franche lors d'un passage de l'organe de référence et du chariot par la position neutre.According to another advantageous aspect of the invention, the device comprises a sensor for detecting a relative position of the reference member and the carriage and controlling a rotation of the electric motor as a function of a signal delivered by the sensor. Preferably, the sensor is a sliding cursor potentiometer having a zero point in the middle of the cursor travel, and delivering opposite voltages on either side of the zero point. Preferably also, the device comprises a switch with frank opening during a passage of the reference member and the carriage by the neutral position.

Selon un autre aspect de l'invention, l'organe de mesure de déplacement comprend un premier capteur de position angulaire associé à l'une des deux poulies du cordon de commande, et un deuxième capteur de position angulaire associé à une poulie de renvoi du câble porteur ou à un arbre de sortie du moteur électrique pour détecter une position relative de l'organe de référence et du chariot.According to another aspect of the invention, the displacement measuring member comprises a first angular position sensor associated with one of the two pulleys of the control cord, and a second angular position sensor associated with a return pulley of the carrying cable or to an output shaft of the electric motor to detect a relative position of the reference member and the carriage.

Selon un autre aspect de l'invention, l'organe de mesure de déplacement comprend une jauge de déformation bidirectionnelle s'étendant entre un point d'attache du cordon de commande et le chariot.According to another aspect of the invention, the displacement measuring member comprises a bidirectional strain gauge extending between a point of attachment of the control cord and the carriage.

Avantageusement, l'organe de mesure de déplacement comprend deux jauges de déformation s'étendant chacune entre un des deux points d'attache du cordon de commande et le chariot.Advantageously, the displacement measurement member comprises two deformation gauges each extending between one of the two attachment points of the control cord and the carriage.

BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

D'autres caractéristiques et avantages de l'invention apparaîtront encore à la lecture de la description qui suit d'un mode de réalisation préféré non limitatif de l'invention en référence aux figures ci-jointes parmi lesquelles:

  • La figure 1 est une vue en perspective d'un appareil de manœuvre selon un premier mode de réalisation de l'invention,
  • La figure 2 est une vue en perspective agrandie partiellement écorchée de l'encadré II de la figure 1,
  • La figure 3 est une vue partielle agrandie de l'encadré III de la figure 2,
  • la figure 4 est une vue partielle agrandie de l'encadré IV de la figure 1,
  • la figure 5 est une vue schématique d'un appareil de manœuvre selon un deuxième mode de réalisation de l'invention,
  • la figure 6 est une vue schématique d'un appareil de manœuvre selon un troisième mode de réalisation de l'invention.
Other characteristics and advantages of the invention will become apparent on reading the following description of a preferred nonlimiting embodiment of the invention with reference to the attached figures, among which:
  • The figure 1 is a perspective view of an operating device according to a first embodiment of the invention,
  • The figure 2 is an enlarged perspective view partially cut away from Box II of the figure 1 ,
  • The figure 3 is a partial enlarged view of Box III of the figure 2 ,
  • the figure 4 is a partial enlarged view of Box IV of the figure 1 ,
  • the figure 5 is a schematic view of a operating device according to a second embodiment of the invention,
  • the figure 6 is a schematic view of an operating device according to a third embodiment of the invention.

DESCRIPTION DETAILLÉE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION

En référence aux figures 1 à 4, l'appareil de manœuvre selon le premier mode de réalisation de l'invention comporte un organe de référence 1 comportant une platine supérieure 2 et une platine inférieure 3 reliées l'une à l'autre par des tirants 4.With reference to figures 1 to 4 , the operating device according to the first embodiment of the invention comprises a reference member 1 comprising an upper plate 2 and a lower plate 3 connected to each other by tie rods 4.

Un cordon de commande 11 a une extrémité reliée à un point d'attache 2.1 de la platine supérieure 2 et une extrémité opposée reliée à un point d'attache 3.1 de la platine inférieure 3. Aux deux extrémités de la boucle ainsi formée, le cordon de commande passe sur une poulie 15 portée pour tourner librement par des joues 16 comportant des perçages 17 pour une fixation au mur. En variante, la poulie 15 inférieure peut ne pas être fixée au mur pour que le poids de ladite poulie exerce une tension sur le cordon de manœuvre 11.A control cord 11 has one end connected to a point of attachment 2.1 of the upper plate 2 and an opposite end connected to a point of attachment 3.1 of the lower plate 3. At the two ends of the loop thus formed, the cord control pass on a pulley 15 carried to rotate freely by cheeks 16 having holes 17 for attachment to the wall. As a variant, the lower pulley 15 may not be fixed to the wall so that the weight of said pulley exerts a tension on the operating cord 11.

L'appareil comporte un dispositif de manœuvre comprenant un chariot 5 monté pour coulisser par rapport à l'organe de référence 1 au moyen de tubes 6 engagés sur les tirants 4. Le chariot 5 comporte en outre deux plaques 7 fixées aux tubes 6 de part et d'autre de la platine 2, et deux plaques 8 fixées aux tubes 6 et supportant un contrepoids 23. Le chariot 5 comporte en outre des fourchettes 9 engagées à cheval sur un rail de guidage 10 fixé au mur.The apparatus comprises an operating device comprising a carriage 5 mounted to slide relative to the reference member 1 by means of tubes 6 engaged on the tie rods. The carriage 5 further comprises two plates 7 fixed to the tubes 6 on the side and on the other side of the plate 2, and two plates 8 fixed to the tubes 6 and supporting a counterweight 23. The carriage 5 further comprises forks 9 engaged astride a guide rail 10 fixed to the wall.

Des câbles porteurs 18, dont un seul a été représenté sur les figures, ont chacun une extrémité reliée à une charge 19, ici un tronçon de poutre porteuse, et l'extrémité opposée accrochée à un plot 20 porté par la plaque 7 en passant sur une poulie de renvoi 21 fixée de façon connue en soi à l'aplomb de la charge 19, et sur une poulie de renvoi 22 portée par une cornière 13. De préférence, afin d'équilibrer les charges, le chariot comporte deux plots 20, un sur chaque face principale du chariot 5.Carrier cables 18, only one of which has been shown in the figures, each have one end connected to a load 19, here a section of carrying beam, and the opposite end hooked to a stud 20 carried by the plate 7 passing over a return pulley 21 fixed in a manner known per se to the plumb of the load 19, and on a deflection pulley 22 carried by an angle iron 13. Preferably, in order to balance the loads, the carriage comprises two studs 20, one on each face main carriage 5.

Par ailleurs le dispositif de manœuvre comporte un moteur électrique 24 porté par le chariot 5 axialement à celui-ci (c'est-à-dire que le moteur électrique 24 a un rotor ayant un axe s'étendant parallèlement à la direction de coulissement du chariot 5). Le moteur électrique 24 est associé à groupe réducteur 25 comportant un arbre de sortie 26 s'étendant perpendiculairement à l'axe du chariot 5 et ayant des extrémités portant chacune un pignon moteur 27 sur lequel est engagé une chaîne à rouleaux 28. Ceci permet d'équilibrer l'effort auquel l'arbre de sortie 26 est soumis. La chaîne à rouleaux 28 est maintenue engagée sur le pignon moteur 27 selon un trajet sinueux par des pignons fous 29. Ceci permet de répartir sur plusieurs dents l'effort auquel le pignon moteur est soumis lors de sa mise en rotation par le moteur 24.Furthermore, the maneuvering device comprises an electric motor 24 carried by the carriage 5 axially thereto (that is to say that the electric motor 24 has a rotor having an axis extending parallel to the sliding direction of the carriage 5). The electric motor 24 is associated with a reduction unit 25 comprising an output shaft 26 extending perpendicular to the axis of the carriage 5 and having ends each carrying a drive pinion 27 on which a roller chain 28 is engaged. This makes it possible to '' balance the force to which the output shaft 26 is subjected. The roller chain 28 is kept engaged on the drive pinion 27 along a sinuous path by idler sprockets 29. This makes it possible to distribute the force to which the drive pinion is subjected during its rotation by the motor 24 over several teeth.

Des tronçons de tige filetée 30 sont fixés à l'extrémité supérieure des chaînes à rouleaux 28. Les tronçons de tige filetée 30 traversent la partie inférieure d'étriers 44 fixés à la cornière 13. Les chaînes à rouleaux 28 sont mises en tension par des écrous 45 vissés sur les tronçons de tige filetée 30 et prenant appui sur la partie inférieure des étriers 44. Les chaînes à rouleaux 28 sont fixées à leur extrémité inférieure, selon un montage analogue à l'extrémité supérieure, à une platine 31 fixée au sol. La cornière 13, la platine 31, et les chaînes à rouleaux définissent une structure porteuse.Threaded rod sections 30 are fixed to the upper end of the roller chains 28. The threaded rod sections 30 pass through the lower part of stirrups 44 fixed to the angle iron 13. The roller chains 28 are tensioned by nuts 45 screwed onto the sections of threaded rod 30 and bearing on the lower part of the stirrups 44. The roller chains 28 are fixed at their lower end, in a similar arrangement at the upper end, to a plate 31 fixed to the ground . The angle iron 13, the plate 31, and the roller chains define a support structure.

Un contrepoids 23, qui s'ajoute au poids du moteur 24 et des autres éléments portés par le chariot 5, est fixé à la plaque 8 pour compenser partiellement le poids de la charge, par exemple un contrepoids de 150 kg pour une charge de 300 kg. Un amortisseur 31 est fixé à l'organe de référence 1 d'une part et au chariot 5 d'autre part pour amortir les mouvements relatifs de l'organe de référence 1 et du chariot 5. Un contrepoids 32 d'équilibrage du poids de l'organe de référence est monté pour coulisser sur le corps de l'amortisseur 31 et est maintenu suspendu par des liens souples 33 fixés au contrepoids 32 d'une part, et à la platine 3 d'autre part en passant sur des poulies de renvoi portées par le chariot 5.A counterweight 23, which is added to the weight of the motor 24 and the other elements carried by the carriage 5, is fixed to plate 8 to partially compensate for the weight of the load, for example a 150 kg counterweight for a 300 kg load. A damper 31 is fixed to the reference member 1 on the one hand and to the carriage 5 on the other hand to dampen the relative movements of the reference member 1 and the carriage 5. A counterweight 32 for balancing the weight of the reference member is mounted to slide on the body of the damper 31 and is held suspended by flexible links 33 fixed to the counterweight 32 on the one hand, and to the plate 3 on the other hand by passing over pulleys of return carried by the carriage 5.

L'organe de référence 1 et le chariot 5 sont ramenés vers une position neutre par un organe élastique, ici deux ressorts hélicoïdaux 35 chacun porté par des coupelles 36 engagées dans les extrémités des ressorts. Par ailleurs, les coupelles 36 prennent appui sur le bord d'une fenêtre dans la platine 2, et sur le bord d'une fenêtre identique dans des plaques 34 qui sont solidaires des plaques 7 et qui encadrent la platine 2 de sorte que les ressorts 35 sont mis en compression quel que soit le sens du déplacement de l'organe de référence et du chariot l'un par rapport à l'autre.The reference member 1 and the carriage 5 are brought back to a neutral position by an elastic member, here two helical springs 35 each carried by cups 36 engaged in the ends of the springs. Furthermore, the cups 36 bear on the edge of a window in the plate 2, and on the edge of an identical window in plates 34 which are integral with the plates 7 and which frame the plate 2 so that the springs 35 are put in compression whatever the direction of movement of the reference member and the carriage relative to each other.

Le dispositif comporte en outre un boîtier électronique associé à un potentiomètre linéaire 37 fixé à une des plaques 34. Le potentiomètre 37 a un point neutre à mi-course et des circuits inverses de part et d'autre du point neutre. Il comporte un curseur 38 engagé dans une ouverture 39 d'une plaquette 40 fixée à la platine 2 de l'organe de référence 1.The device further comprises an electronic unit associated with a linear potentiometer 37 fixed to one of the plates 34. The potentiometer 37 has a neutral point at mid-stroke and reverse circuits on either side of the neutral point. It includes a slider 38 engaged in an opening 39 of a plate 40 fixed to the plate 2 of the reference member 1.

Un interrupteur 41 à ouverture franche est également monté sur la plaque 34 du chariot 5 et comporte une tige de manœuvre basculante 43 dont la position est commandée par une fourchette 42 portée par la platine 2 de l'organe de référence 1 et passant dans une fente 46 de la plaque 34. La tige de manœuvre 43 est mobile entre une position neutre pour laquelle l'interrupteur 41 est ouvert, et une position basculée vers le haut ou vers le bas pour laquelle l'interrupteur 41 est fermé.A switch 41 with frank opening is also mounted on the plate 34 of the carriage 5 and comprises a tilting operating rod 43 whose position is controlled by a fork 42 carried by the plate 2 of the reference member 1 and passing through a slot Plate 46 34. The operating rod 43 is movable between a neutral position for which the switch 41 is open, and a tilted up or down position for which the switch 41 is closed.

A partir de la position illustrée sur la figure 1 pour laquelle l'ensemble chariot/organe de référence est en position basse et la charge est levée, une traction vers le bas exercée sur le brin avant du cordon de commande 11 provoque, du fait de la compression des ressorts 35, un déplacement vers le haut de l'organe de référence 1 par rapport au chariot 5. Le déplacement relatif entre ces deux composants est mesuré par la position du curseur du potentiomètre 37, ce qui déclenche la mise en rotation du moteur électrique 24 dans un sens de remontée de l'ensemble chariot/organe de référence. Le signal délivré par le potentiomètre 37 peut être de façon connue en soi interprété comme une consigne de positionnement, de vitesse, ou d'accélération. Dans le cas d'une manœuvre de décors de théâtre, la consigne utilisée est de préférence une consigne d'accélération qui correspond mieux aux dispositifs mécaniques antérieurs.From the position illustrated on the figure 1 for which the carriage / reference member assembly is in the low position and the load is lifted, a downward traction exerted on the front strand of the control cord 11 causes, due to the compression of the springs 35, a displacement towards the top of the reference member 1 with respect to the carriage 5. The relative displacement between these two components is measured by the position of the cursor of the potentiometer 37, which triggers the rotation of the electric motor 24 in an upward direction of the 'carriage / reference unit assembly. The signal delivered by the potentiometer 37 can in a manner known per se be interpreted as a positioning, speed, or acceleration instruction. In the case of a theater set maneuver, the setpoint used is preferably an acceleration setpoint which corresponds better to the prior mechanical devices.

La consigne de mise en mouvement existe aussi longtemps que l'utilisateur exerce sur le cordon un effort provoquant la compression des ressorts 35. La valeur de la consigne est proportionnelle à l'effort exercé.The set point set in motion exists as long as the user exerts on the cord a force causing the compression of the springs 35. The value of the set point is proportional to the force exerted.

Si l'utilisateur retient ou immobilise le cordon de commande 11, le mouvement du chariot 5 ramène naturellement le potentiomètre 37 et l'interrupteur 41 vers la position neutre.If the user retains or immobilizes the control cord 11, the movement of the carriage 5 naturally returns the potentiometer 37 and the switch 41 to the neutral position.

Si l'utilisateur libère le cordon de commande 11, ce sont les ressorts 35 qui agissent pour ramener le potentiomètre 37 et l'interrupteur 41 vers la position neutre.If the user releases the control cord 11, it is the springs 35 which act to bring the potentiometer 37 and the switch 41 back to the neutral position.

L'amortisseur 31 permet d'éviter que ce mouvement de retour soit trop violent et qu'il s'effectue avec un rebond.The damper 31 makes it possible to prevent this return movement from being too violent and that it takes place with a rebound.

Lorsque la position neutre est atteinte et que le chariot 5 est arrêté ou à faible vitesse, le courant est coupé puis le frein du moteur électrique 24 est serré.When the neutral position is reached and the carriage 5 is stopped or at low speed, the current is cut and the brake of the electric motor 24 is applied.

La figure 5 illustre un deuxième mode de réalisation de l'invention concernant, comme précédemment, un appareil de manœuvre d'une charge par rapport à une structure porteuse. L'appareil de manœuvre illustré à la figure 5 est similaire à celui illustré aux figures 1 à 4 à la différence que l'organe de référence est ici articulé.The figure 5 illustrates a second embodiment of the invention relating, as before, to a device for maneuvering a load with respect to a carrying structure. The switching device illustrated in figure 5 is similar to that illustrated in figures 1 to 4 with the difference that the reference organ is here articulated.

L'appareil de manœuvre comporte ainsi un organe de référence 101 comprenant une platine supérieure 102 et une platine inférieure 103 qui sont reliées l'une à l'autre par un unique tirant 104 et sont reliées chacune au chariot 105 par une articulation pivot 102.2, 103.2 de manière à former un parallélogramme déformable. La platine supérieure 102 et la platine inférieure 103 comportent une masse en arrière de leurs points pivot 102.2, 103.2 pour équilibrer leur poids.The operating device thus comprises a reference member 101 comprising an upper plate 102 and a lower plate 103 which are connected to each other by a single tie rod 104 and are each connected to the carriage 105 by a pivot articulation 102.2, 103.2 so as to form a deformable parallelogram. The upper plate 102 and the lower plate 103 have a mass behind their pivot points 102.2, 103.2 to balance their weight.

Comme précédemment, un cordon de commande 111 a une extrémité reliée à un point d'attache 102.1 de la platine supérieur 102 et une extrémité opposée reliée à un point d'attache 103.1 de la platine supérieur 103. L'appareil comporte un dispositif de manœuvre comprenant le chariot 105 monté pour coulisser le long du tirant 104 de l'organe de référence au moyen d'un tube 106 engagé sur ledit tirant. L'appareil comporte également un moteur électrique 124 porté par le chariot 105 agencé de manière identique au premier mode de réalisation décrit précédemment.As before, a control cord 111 has one end connected to an attachment point 102.1 of the upper plate 102 and an opposite end connected to an attachment point 103.1 of the upper plate 103. The apparatus includes an operating device comprising the carriage 105 mounted to slide along the tie rod 104 of the reference member by means of a tube 106 engaged on said tie rod. The device also includes an electric motor 124 carried by the carriage 105 arranged in an identical manner to the first embodiment described above.

Une jauge de contrainte 150 est monté entre le chariot et le tirant 104 pour mesurer le déplacement relatif rectiligne de l'organe de référence et du chariot et ainsi commander la rotation du moteur électrique en fonction de ce déplacement.A strain gauge 150 is mounted between the carriage and the tie rod 104 to measure the displacement relative rectilinear of the reference member and the carriage and thus control the rotation of the electric motor as a function of this displacement.

La figure 6 illustre un troisième mode de réalisation de l'invention similaire au premier mode de réalisation illustré aux figures 1 à 4, à la différence que le chariot portant le moteur électrique est ici monté fixe par rapport à l'organe de référence.The figure 6 illustrates a third embodiment of the invention similar to the first embodiment illustrated in figures 1 to 4 , with the difference that the carriage carrying the electric motor is here mounted fixed relative to the reference member.

Ainsi, l'appareil de manœuvre comporte un organe de référence 201 relié à une extrémité d'un cordon de commande 211 par une première jauge de contrainte 250 et relié à une extrémité opposée du cordon de commande 211 par une deuxième jauge de contrainte 251. Un chariot 205 est monté fixe par rapport à l'organe de référence 201 et porte un moteur électrique 224.Thus, the operating device comprises a reference member 201 connected to one end of a control cord 211 by a first strain gauge 250 and connected to an opposite end of the control cord 211 by a second strain gauge 251. A carriage 205 is mounted fixed relative to the reference member 201 and carries an electric motor 224.

Une traction du cordon de commande 211 exercée vers le bas provoque une déformation de la première jauge de contrainte 250 qui délivre un signal déclenchant la mise en rotation du moteur électrique 224 dans un sens de remontée de l'ensemble organe de référence/chariot. A l'inverse, une traction du cordon de commande 211 exercée vers le haut provoque une déformation de la deuxième jauge de contrainte 251 qui délivre un signal déclenchant la mise en rotation du moteur électrique 224 dans un sens de descente de l'ensemble organe de référence/chariot.A pull of the control cord 211 exerted downwards causes a deformation of the first strain gauge 250 which delivers a signal triggering the rotation of the electric motor 224 in a direction of ascent of the reference member / carriage assembly. Conversely, a pull of the control cord 211 exerted upwards causes a deformation of the second strain gauge 251 which delivers a signal triggering the rotation of the electric motor 224 in a direction of descent of the organ assembly. reference / cart.

Bien entendu l'invention n'est pas limitée aux modes de réalisation décrits et on peut y apporter des variantes de réalisation sans sortir du cadre de l'invention telle que définie par les revendications.Of course, the invention is not limited to the embodiments described and it is possible to make variant embodiments without departing from the scope of the invention as defined by the claims.

Bien que l'invention ait été décrite en relation avec la manœuvre d'un décor de théâtre, l'invention s'applique à tout dispositif de manœuvre d'une charge. Le fonctionnement symétrique du moteur en compensation d'effort offre la possibilité d'utiliser un contrepoids pour augmenter la capacité de charge du système.Although the invention has been described in relation to the operation of a theater set, the invention applies to any device for operating a load. The symmetrical operation of the force compensation offers the possibility of using a counterweight to increase the load capacity of the system.

Bien que l'invention ait été décrite avec un ensemble moteur comportant un moteur électrique associé à une chaîne à rouleaux, l'invention peut être réalisée avec un ensemble moteur quelconque.Although the invention has been described with an engine assembly comprising an electric motor associated with a roller chain, the invention can be implemented with any engine assembly.

Bien que l'invention ait été décrite avec un mouvement de coulissement du chariot par rapport à l'organe de référence, l'invention peut être réalisée avec des pièces articulées l'une par rapport à l'autre.Although the invention has been described with a sliding movement of the carriage relative to the reference member, the invention can be carried out with parts articulated with respect to each other.

L'invention peut comprendre des moyens de commande additionnels, notamment manuels, et par exemple des boutons poussoirs ou une télécommande. Ces moyens de commandes additionnels peuvent en outre comprendre une unité informatique pilotant le moteur selon une séquence programmée.The invention may include additional control means, in particular manual, and for example push buttons or a remote control. These additional control means may also include a computer unit controlling the engine according to a programmed sequence.

Bien que dans le premier mode de réalisation de l'invention, le déplacement relatif de l'organe de référence et du chariot soit mesuré par le curseur 38 d'un potentiomètre 37, il est également possible de déterminer ce déplacement en utilisant par exemple, d'une part, un premier capteur de position angulaire associé à une des poulies 15 du cordon de commande pour mesurer le déplacement de l'organe de référence et, d'autre part, un deuxième capteur de position angulaire associé à une des poulies de renvoi 21, 22 du câble porteur 18 ou à l'arbre de sortie 26 du moteur électrique pour mesurer le déplacement du chariot 5. Une simple comparaison des mesures réalisées par le premier et le deuxième capteur de position angulaire permet en effet de déterminer le déplacement relatif entre l'organe de référence et le chariot.Although in the first embodiment of the invention, the relative displacement of the reference member and the carriage is measured by the cursor 38 of a potentiometer 37, it is also possible to determine this displacement by using for example, on the one hand, a first angular position sensor associated with one of the pulleys 15 of the control cord for measuring the displacement of the reference member and, on the other hand, a second angular position sensor associated with one of the pulleys of return 21, 22 of the carrying cable 18 or to the output shaft 26 of the electric motor to measure the displacement of the carriage 5. A simple comparison of the measurements made by the first and the second angular position sensor makes it possible in fact to determine the displacement relative between the reference member and the carriage.

Une autre solution pour mesurer le déplacement relatif de l'organe de référence et du chariot peut aussi être d'utiliser une jauge de déformation bidirectionnelle reliant le point d'attache 2.1 du cordon de commande au chariot. Le capteur utilisé pour détecter le déplacement des points d'attache peut être de tout type permettant une mesure de déplacements relativement importants (comme dans le cas du déplacement du chariot par rapport à l'organe de référence) ou infimes (comme la déformation de la pièce portant les points d'attache). Le capteur peut être un capteur numérique.Another solution for measuring the relative displacement of the reference member and the carriage can also be to use a bidirectional strain gauge connecting the attachment point 2.1 of the control cord to the cart. The sensor used to detect the displacement of the attachment points can be of any type allowing a measurement of relatively large displacements (as in the case of the displacement of the carriage relative to the reference member) or minute (such as the deformation of the part carrying the attachment points). The sensor can be a digital sensor.

Le capteur peut être tout capteur d'effort fournissant un signal exploitable pour piloter le moteur.The sensor can be any force sensor providing an exploitable signal to control the engine.

Dans le cas d'un mode de réalisation pour lequel le moteur électrique est fixe, le dispositif de manœuvre est de préférence un cordon en boucle dont les extrémités sont fixées à l'organe de référence, et le chariot est de préférence entrainé par une chaîne qui a des extrémités fixées au chariot pour former une boucle autour de pignons de renvoi et qui engrène avec un pignon de sortie du moteur fixe.In the case of an embodiment for which the electric motor is fixed, the operating device is preferably a loop cord whose ends are fixed to the reference member, and the carriage is preferably driven by a chain which has ends fixed to the carriage to form a loop around idler gears and which meshes with an output pinion of the fixed motor.

Claims (16)

  1. Apparatus for moving a load (19) relative to a carrier structure, the apparatus comprising a carrier cable (18) having a first end connected to the load, and a second end connected to a movement device, the movement device including an electric motor (24) and a carriage (5) that is mounted to move relative to the carrier structure and that is configured to move relative to the carrier structure during rotation of the motor, the device including an operating line (11) having its two ends connected via respective attachment points (2.1, 3.1) to the carriage so as to form a loop around two pulleys (15) mounted on the carrier structure, and the device including a control member (37) associated with a member (38) for measuring movement of the attachment point relative to the carriage in order to control rotation of the electric motor as a function of that movement.
  2. Apparatus according to claim 1, wherein the electric motor has an outlet shaft (26) carrying at least one drive sprocket wheel (27) co-operating with at least one roller chain (28).
  3. Apparatus according to claim 2, including deflector sprocket wheels (29) arranged on either side of the drive sprocket wheel (27) in order to press the roller chain against the drive sprocket wheel along a sinuous path.
  4. Apparatus according to claim 1, wherein the electric motor is carried by the carriage.
  5. Apparatus according to claim 4, including an additional counterweight (23) carried by the carriage.
  6. Apparatus according to claim 1, wherein the carriage is movably mounted on reference member (1) including the attachment points, and in that the control member (37) for controlling the electric motor issues a control signal as a function of the relative position of the carriage and of the reference member.
  7. Apparatus according to claim 6, including a resilient member (35) fastened both to the reference member (1) and to the carriage (5), and configured to return the reference member and the carriage to a neutral position relative to each other in which the control signal is zero.
  8. Apparatus according to claim 6, wherein the movement measurement member comprises a sensor (37) for detecting the relative position of the reference member and of the carriage, and for causing the electric motor to rotate as a function of the signal delivered by the sensor.
  9. Apparatus according to claim 8, wherein the sensor is an analog sensor.
  10. Apparatus according to claim 9, wherein the sensor is a potentiometer (37) having a slider (38) having a zero point at the middle of the stroke of the slider and delivering opposite voltages on either side of the zero point.
  11. Apparatus according to claim 10, including a snap-opening switch (41) that opens when the reference member and the carriage pass through the neutral position.
  12. Apparatus according to claim 6, including a damper (31) mounted between the reference member and the carriage.
  13. Apparatus according to claim 6, wherein the movement measurement member comprises a first angular position sensor associated with one of the two pulleys (15) of the operating line (11), and a second angular position sensor associated with a return pulley (21, 22) of the carrier cable or with an outlet shaft (26) of the electric motor in order to detect the relative position between the reference member and the carriage.
  14. Apparatus according to claim 6, wherein the movement measurement member comprises a bidirectional strain gauge extending between an attachment point of the operating line and the carriage.
  15. Apparatus according to claim 6, wherein the reference member comprises a top plate (102) and a bottom plate (103) connected to each other by a tie-rod (104), and each connected to the carriage via a pivot hinge (102.2, 103.2), the carriage (105) being mounted to slide along the tie-rod (4).
  16. Apparatus according to claim 1, wherein the movement measurement member comprises two strain gauges, each extending between one of the two attachment points of the operating line and the carriage.
EP17746505.1A 2016-08-04 2017-08-04 Scenery manoeuvring apparatus Active EP3493886B1 (en)

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FR1657578A FR3054836B1 (en) 2016-08-04 2016-08-04 DECOR OPERATING DEVICE
PCT/EP2017/069861 WO2018024904A1 (en) 2016-08-04 2017-08-04 Scenery-manoeuvring apparatus

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US20190184303A1 (en) 2019-06-20
US10537822B2 (en) 2020-01-21
EP3493886A1 (en) 2019-06-12
WO2018024904A1 (en) 2018-02-08
FR3054836A1 (en) 2018-02-09
FR3054836B1 (en) 2020-06-26

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