FR3035390B1 - DEVICE FOR CONTROLLING THE RISE AND / OR DESCENT OF AN OBJECT, IN PARTICULAR A THEATER DECOR - Google Patents

Abstract

Device for controlling the rise and / or fall of an object, for example a theatrical decoration, comprising a main shaft (5) arranged in particular substantially horizontally in height and driving at least one drum (4), preferably a plurality of drums, in particular equidistant, each drum being associated with a cable (3) whose lower end is secured to the object, in particular to the decor, and the other end is secured to the drum, so that the cable is wraps around the drum during the rise of the object by forming turns which are offset relative to each other in the direction of the shaft and take place during the descent of the object, and the main shaft being rotated by a motor, in particular a geared motor.

Description

The present invention relates to a device for controlling the ascent and / or descent of an object, particularly a theatrical scenery, as well as a theatrical set comprising a theatrical scenery and a control device. Of this genre. The present invention also relates to a theater comprising a theater ensemble of this type.

In the prior art, it is already known to raise or lower a theater set, in the background of the actors, a device that has an upper transverse beam, from which protrude a plurality of boxes of nuts and trees. associated transmission cooperating with a respective chain connected to its other end to the decor to raise or lower, each string s'amagasinant during the rise of the decor in a clean bag placed under each housing.

These devices of the prior art are particularly heavy and complex to implement. This is the price to pay for a perfectly centered (rectilinear) movement of the decor during its ascent or descent.

The present invention aims at overcoming the drawbacks of the prior art by proposing a system for controlling the rise and fall of an object in a vertical direction, in particular a theatrical scenery, which while making it possible to ensure that the decor follows a perfectly rectilinear vertical movement during its rise or descent, in particular without undergoing lateral lateral shift, is at the same time simple structure and lightweight manufacturing as a whole.

According to the invention, a device for controlling the rise and / or fall of an object, for example a theatrical decoration, comprising a main shaft, arranged in particular substantially horizontally in height and driving at least one drum, preferably a plurality of drums, particularly equidistant drums, each drum being associated with a cable whose lower end is secured to the object, in particular the decor, and the other end is secured to the drum, so that the cable wraps around the drum during the rise of the object by forming turns which are offset relative to each other in the direction of the shaft and take place during the descent of the object, and the main shaft being rotated by a motor, in particular a geared motor, is characterized in that there is provided means for moving laterally parallel to the axis of the shaft the drum or drums as and when the climb or the descent of the object to thereby limit, preferably cancel, any lateral movement of the object resulting from the winding of the cable (s) around the drum or (s).

According to a preferred embodiment of the invention, the motor, in particular the geared motor, the drum (s) and the main shaft are secured to each other at least for their displacement in the direction of the longitudinal axis of the motor. the tree.

According to a preferred embodiment of the invention, the motor is coupled to a worm fixed with respect to the theater scene and there is provided a nut integral with the motor, so as to move in one direction or the other depending on the rotation of the shaft rotating the drums, together the shaft and the geared motor to ensure the perfectly vertical movement of the object, including the decor.

According to another embodiment, the motor is coupled to a fixed nut relative to the theater stage and there is provided a worm integral with the motor, so as to move, in one direction or the other according to the rotation of the shaft rotating the drums, together the shaft and the geared motor to ensure the perfectly vertical movement of the object, including the decor.

According to a particularly preferred embodiment, the main shaft passes into at least one, preferably a plurality of bearings arranged along its longitudinal axis, the bearings being fixed with respect to the theater stage, in particular the ceiling of the theater, the bearings allowing both within them the rotation of the shaft and its translation.

In particular, according to a preferred embodiment, the bearings are teflon-based.

According to a preferred embodiment of the invention, the control device is received in a box beam, in particular a trellis beam, itself fixed at the top of the stage where the object is to be moved, in particular from the stage. theatre.

According to the invention, a particularly simple and light system is obtained, which at the same time ensures a perfectly rectilinear vertical movement, in particular of a stage decoration over a theater stage, the displacement of the tree and drums being synchronized with the winding or unwinding of the one or more cables to ensure that the winding-related offset of the spiral-shaped cables which are formed one after the other in the longitudinal direction of the tree during the climb and / or which disintegrate one after another during the descent of the scenery is perfectly compensated by the displacement in the opposite direction of the drum or drums.

The present invention also relates to a theatrical set comprising a theatrical scenery and connected by at least one cable, preferably a plurality of cables, to a device according to the invention.

The present invention also relates to a theater comprising a theater stage and a theatrical set according to the invention. By way of example, a preferred embodiment of the invention will now be described with reference to the drawings in which: FIG. 1 is a diagrammatic overall view of a device and an assembly according to the invention; FIG. 2A is a view in more detail of the left-hand part of the device of FIG. 1, in which are represented the geared motor and the leftmost drum of FIG. 1, the latter being in its extreme right-most position; wherein its associated cable is fully unwound; Figure 2B is a view similar to Figure 2A, in which the leftmost drum in Figure 1 has been shifted to its extreme left position, in which its associated cable has been fully wound; Figure 3 is an enlarged view of the circled portion of Figure 2B; Figure 4 is a more detailed view of a bearing of the device shown only functionally in Figures 1 and 2; Figure 5 is a sectional view along the line A-A of Figure 4; and FIG. 6 is a sectional view along line C-C of FIG. 2A. FIG. 1 diagrammatically shows a device according to the invention, in the form of a theatrical scene comprising a cloth 1 arranged vertically and supported by a horizontal upper crossbar 2 to which ends of a plurality of cables 3 for lifting or lowering the decor canvas. Each cable 3 cooperates with a respective cylindrical drum 4 having a horizontal axis parallel to the horizontal axis of the crosspiece 2. Each drum 4 comprises, on its outer face, helical striations in which spirals are formed. winding of the cable associated with the drum. The drums 4 are arranged at a distance from one another and are coupled to a horizontal main shaft 5 with which they are secured at least in rotation and in translation in the horizontal direction. Preferably the drums are fixed relative to the shaft 5. The main shaft is rotated by a geared motor 8 arranged at a lateral end of the shaft. At the other end of the shaft is a braking device 9.

The geared motor 8, the shaft 5, the drums 4 and the braking device 9 are integral in translation in the horizontal direction of each other, and in particular are fixed relative to each other. Thus, when the shaft is translated to the right or to the left in Figures 1, 2A or 2B, each drum undergoes the same translation, as well as the geared motor 8 and the brake 9. Similarly, when the tree is undergoing one rotation, each drum undergoes the same rotation. The geared motor is supported by an auxiliary beam 10 fixed relative to a theater wall and supported in a bearing 11 which can slide along the beam 10. The bearing is secured to the gear motor 8. Similarly, the brake 9 is supported by an auxiliary beam 12 fixedly mounted relative to the ceiling 7 of the theater and supported in an associated bearing 13 which can slide along the beam 12 and which is integral with the brake 9. The shaft 5 is supported by bearings 6 themselves fixed in relation to the ceiling 7 of the theater. Instead of the ceiling 7, there could be a box, especially in the form of trellis, itself attached to the theater ceiling or side walls.

The shape of the bearings 6 is shown in more detail in FIGS. 4 and 5. These are, in particular, applied bearings of the Igubal (registered trademark) trademark of reference KFSM-GT. These bearings allow both a sliding or sliding movement and a rotational movement of the shaft passing within them. According to a preferred embodiment of the invention, they are made of Teflon. The bearings 11 in turn can be seen in Figure 6. The bearings 13 are identical to the bearings 11.

The gear motor 8, the shaft 5 and the drums 4 undergo a translational movement controlled by means of a trapezoidal nut 15 and a worm 16, itself secured to the theater room.

The gear motor 8 comprises a hollow shaft 20 in which the trapezoidal nut 15 is received. The nut 15 is secured to the shaft 5. On the other hand, the nut cooperates with the worm 16. The shaft 5 is keyed, by a key 17, to the hollow shaft 20 of the gear motor. Similarly, the nut is keyed by a key 21 to the shaft 5. The hollow shaft 20 rotates relative to the gear motor, but is integral with it in translation.

The geared motor, through its hollow shaft rotates shaft 5 and the nut 15 secured thereto. The gearmotor is mounted guided in translation along a rail 10, bearings 11 coming from the geared motor ensuring the sliding and the support of the geared motor along the rail 10. The support of the brake 9 by the bearings 13 along the rail 12 is in the same way, the bearings 11 and 13 being identical.

At the same time, the nut is rotated around the worm by the hollow shaft and moves along the worm in one direction or the other, depending on the direction of rotation of the worm. Hollow output shaft of the gear motor.

This results in a translation of the shaft 5, the gear motor, the nut and the drums.

According to another embodiment not shown in the figures, the nut and the worm are interchanged. The nut is integral with the theater while the worm is rotated by the hollow shaft. The worm, the shaft 5, the gear motor and the drums thus move together in solidarity while the nut remains fixed.

In one embodiment or the other is made so that the pitch of the worm and the thread of the drum are identical, so that the translation imparted to the shaft 5 by the rotation of the nut is the worm exactly compensates for the relative displacement of the cables with respect to their respective drum, relative movement caused by the winding of the cable around the drum in the form of turns offset relative to each other. Similarly, during unwinding of the cable, the reverse compensation is performed. Thus, when we move from the position of the decor in Figure 2A (fully lowered decor with fully unwound cable) to that of Figure 2B (fully raised decor with fully wrapped cable) or vice versa, the canvas 1 has not suffered a perfectly vertical movement without lateral drift.

When the hollow output shaft of the geared motor rotates in one direction, it drives the nut 15 so that the geared motor 8 undergoes a translation to the left driving with it the drums 4. Thus, for example, during the rise of the decor In theater, the stage set is dragged to the right due to the fact that as the cable is wound on the drum, the cable shifts slightly to the right. This action is compensated by the displacement to the left of the shaft assembly 5, drums 4 and geared motor 8 related to the movement of the nut 15 relative to the screw 16, so as to have a movement of the decor from top to bottom or from bottom to top perfectly straight.

Claims (10)

1. Device for controlling the rise and / or fall of an object, for example a theatrical decoration, comprising a main shaft (5), arranged in particular substantially horizontally in height and driving at least one drum (4), preferably a plurality of drums, especially equidistant drums, each drum being associated with a cable (3) whose lower end is secured to the object, in particular the decor, and the other end is secured to the drum, so that the cable wraps around the drum during the rise of the object by forming turns which are offset relative to each other in the direction of the shaft and take place during the descent of the object, and the shaft main gear being rotated by a motor, in particular a geared motor, characterized in that means (15, 16, 20) are provided for moving laterally parallel to the axis of the shaft the drum (s) at the as the climb or the descent of the object to thereby limit, preferably cancel, any lateral movement of the object resulting from the winding of the cable (s) around the drum or (s), and the main shaft goes into at least a bearing arranged fixed with respect to the stage of the theater, in particular the ceiling, the bearing allowing both within it the rotation of the shaft and its translation, and in that there is provided a plurality of bearings arranged along the longitudinal axis of the main shaft (5). 2. Device for controlling the rise and / or fall of an object, for example a theatrical decoration, comprising a main shaft (5) arranged in particular substantially horizontally in height and driving at least one drum (4), preferably a plurality of drums, especially equidistant drums, each drum being associated with a cable (3) whose lower end is secured to the object, in particular the decor, and the other end is secured to the drum, so that the cable wraps around the drum during the rise of the object by forming turns which are offset relative to each other in the direction of the shaft and take place during the descent of the object, and the shaft main gear being rotated by a motor, in particular a geared motor, characterized in that means (15, 16, 20) are provided for moving laterally parallel to the axis of the shaft the drum (s) at the as the climb or the d escente the object to thereby limit, preferably cancel, any lateral movement of the object resulting from the winding of the cable (s) around the drum or (s), and the main shaft goes into at least a landing arranged fixed with respect to the stage of the theater, including the ceiling, the bearing allowing both within it the rotation of the shaft and its translation, the bearings allowing both a sliding movement and a rotational movement of the tree passing in their bosom. 3. Control device for raising and / or lowering an object, for example a theatrical decoration, comprising a main shaft (5), arranged in particular substantially horizontally in height and driving at least one drum (4), preferably a plurality of drums, especially equidistant drums, each drum being associated with a cable (3) whose lower end is secured to the object, in particular the decor, and the other end is secured to the drum, so that the cable wraps around the drum during the rise of the object by forming turns which are offset relative to each other in the direction of the shaft and take place during the descent of the object, and the shaft main gear being rotated by a motor, in particular a geared motor, characterized in that means (15, 16, 20) are provided for moving laterally parallel to the axis of the shaft the drum (s) at the as the climb or the descent of the object to thereby limit, preferably cancel, any lateral movement of the object resulting from the winding of the cable (s) around the drum or (s), and the main shaft goes into at least a landing arranged fixed with respect to the stage of the theater, in particular the ceiling, the bearing allowing both within it the rotation of the shaft and its translation, and in that the motor is coupled to a worm fixed by compared to the theater scene and there is provided a nut integral with the motor, so as to move in one direction or the other depending on the rotation of the shaft rotating the drums, together the shaft and the geared motor to ensure the perfectly vertical movement of the object, including the decor. 4. Device according to one of claims 1 to 3, characterized in that the motor, in particular the geared motor, the drum (s) and the main shaft are secured to each other at least for their movement in the direction of the longitudinal axis of the tree. 5. Device according to one of claims 1 to 4, characterized in that the bearing (s) is / are teflon-based. 6. Device according to one of claims 1 to 5, characterized in that the geared motor comprises a hollow shaft (20) output secured to the main shaft (5), in particular by a key (17). 7. Device according to claim 6, characterized in that the nut, in particular trapezoidal, is keyed to the shaft (5) main. 8. Device according to one of the preceding claims, characterized in that there is provided means for controlling the rotation of the output shaft of the motor to ensure that as and when the cable on the drum by shifting slightly to the right this offset is compensated by the displacement to the left of the shaft assembly 5, drums 4 and motor 8 related to the movement of the nut 15 relative to the screw 16, so to have a movement of the decor from top to bottom or from bottom to top perfectly straight. 9. Theater set comprising a theater set and a device according to one of the preceding claims. 10. Theater comprising a theater stage and a set according to claim 9.