FR2758522A1 - DOOR SYSTEM, PARTICULARLY FOR A PASSENGER AIRCRAFT - Google Patents

Abstract

Door system comprising a supporting and pivoting device (10, 14) arranged between the door panel (2à and the door frame (12) and a translation device (18) which moves the door panel (2) to the end of the closing movement transversely to the pivoting direction following a curved path to the fully closed position with engagement with receiving elements (4) integral with the door frame and brings it, to the start of the movement of opening, by a translation in the opposite direction, out of engagement with said elements (4). The translation device (18) has a double drive system (20) guiding the door panel (2) on the curved path , and comprising a first element (26) controlling the height displacement of the door panel and at least a second element (30) acting obliquely with respect to the first and controlling the transverse movement of the door panel as a function of the curved path .pa r.

Description

DOOR SYSTEM, PARTICULARLY FOR AN AIRPLANE

PASSENGER VERSION

  The present invention relates to a door system, in particular for a passenger version airplane, comprising a support and pivoting device arranged between the door panel and the door frame, as well as a translation device which moves the panel. door at the end of the closing movement transversely to the pivoting direction following a curved translation path in the fully closed position with engagement in form complementarity with receiving elements integral with the door frame, and brings it , at the start of the opening movement, by a translational movement in the opposite direction, out of grip by complementarity of form with said elements

reception.

  In the case of door systems of this type as they are known for example from document DE 44 13 307 A1, it is necessary, when opening, to lift the door panel along a curved translational path in function of the exterior contour of the aircraft fuselage, to release it from receiving elements integral with the door frame, before being able to pivot it to the fully open position. The translation control is produced using an articulated quadrilateral which is arranged between the door panel and the pivoting device, but the kinematics of which are however limited to determined translation paths and therefore to determined external contours of aircraft fuselages. If, on the other hand, for the control control of the door panel, roller or sliding guides curved according to the external contour of the fuselage of the airplane, jamming or blocking may occur for example when the guides have been damaged or deformed

due to external shocks.

  The object of the present invention is to provide a door system of the type defined above in which the door panel can be moved in a simple and reliable manner from the structural point of view according to translation trajectories whose shape can be

  predetermined at will within wide limits.

  This object is achieved, according to the invention, by the fact that the translation device for the door panel has a double drive system guiding the door panel on the curved translation path, and comprising a first drive element controlling the height movement of the door panel and at least one second drive element acting obliquely to the first and controlling the transverse movement of the door panel as a function of the

  curved translation trajectory.

  On the door system according to the invention, the double drive system not only ensures translational movement, but also kinematic guidance of the door panel by the fact that the double drive system is integrated as part adjustable in length in the translation kinematics and intervenes in the direction of control in the translation path of the door panel, which considerably widens the choice of possible translation paths and makes it possible to adapt the translation device to practically any which door panel translational trajectory. In addition, the travel device is compact, light and extremely reliable from the point of view

risk of jamming or blocking.

  To simplify the structure, but above all to increase reliability from the failure point of view, the two drive elements can be driven by a single drive unit at reciprocally tuned travel speeds as a function of the trajectory of

curved translation.

  Preferably, the double drive system can be mounted between the door frame and the support and pivoting device, so that the pivot axis of the support and pivoting device retains, independently of the translational movement of the panel. door, a constant vertical orientation relative to the door frame. Depending on the mounting conditions, it is however also possible to arrange the system

  translation kinematics, including the drive system

  double, between the pivoting device and the

Doorframe.

  For safety reasons, it is advantageous to provide, in addition to the double drive system, a backup drive system for at least one translation of opening of the door panel, this backup system reinforcing or replacing the system. drive

  double if the latter fails.

  To simplify the supply of energy, the dual drive system can preferably be a

electrical system.

  Finally, to guarantee reliable movement control, at least one drive element of the double drive system is advantageously provided as

  as drive and guide screws.

  Referring to the appended schematic drawings, an embodiment of the invention will be described below in more detail; in the drawings: FIG. 1 represents a door system with pivoting opening for a passenger version airplane, in the fully closed position, the door panel being in the lower end of translation position in which it is lowered into the bay door (partially shown) of the aircraft fuselage; Figure 2 is a side view of the door panel and the translation device in the position of

  end of translation according to FIG. 1.

  The door system illustrated by the drawings is of the "plug" or "studded" type, that is to say with a door panel 2 which, in the fully closed position, is lowered for entry into taken, by complementarity of form, between receiving elements 4 integral with the door frame (shown in dashes in Figure 1) and supports (or tenons) 6 fixed to the edge of the door panel, and which, in view of the opening is first lifted in relation to the door opening 8 to be brought out of grip by complementarity of shape with the receiving elements 4 (arrow A) before being able to be released by pivoting outwards from door bay 8 and then be moved essentially parallel to the outer fuselage contour to the fully open position

(arrow B).

  The support and pivoting device necessary for this purpose comprises a support arm 10 which is on the one hand mounted to pivot about an axis T on the door frame 12 and is on the other hand provided with a support piece 14 connected to the support arm 10 so as to be able to pivot about an axis D parallel to the axis T, as well as two connecting rods 16 which act between the door panel 2 and the door frame 12 and by which the panel door 2 is guided in the movement phase B. The translational movement of the door panel 2 along a translation trajectory corresponding to the exterior contour of the fuselage and predetermined by the position of the receiving elements 4 and of the supports 6 is produced by a device of translation referenced 18 as a whole, disposed between the door panel 2 and the support part 14. This device comprises a double drive system 20 with an electric motor 24 mounted on the door panel 2 in a manner re to be able to pivot about an axis 22, as well as a first drive element in the form of a rotary screw 26 whose nut 28 is pivotally mounted on the support piece 14, and a second element drive in the form of a drive lever 30 which is pivotally connected to a connecting rod 34 connected by a hinge pin 32 to the support part 14. The translation device 18 also comprises a second connecting rod 40 acting between a hinge pin 36 on the door panel side and a pin

  hinge 38 on the support part side.

  From a kinematic point of view, the translation device 18 operates in the manner of an articulated quadrilateral having the axes of articulation 22, 32, 36 and 38, the distance between the axes 22 and 32 being however not constant, but variable in a controlled manner using the drive lever 30, while the translation in height of the articulated quadrilateral and therefore of the door panel 2 relative to the support arm 10 is carried out using the screw drive 26. By the appropriate choice of the geometry of the articulated quadrilateral and the reciprocal agreement of the speeds of movement of the drive elements 26 and 30, it is possible to move the door panel 2 with great precision according to any which curved translation path, as indicated in FIG. 2 by the translation paths O and U for the upper 42 and lower 44 ends of the door panel. The speeds of movement of the drive elements 26 and 30 jointly driven by the electric motor 24 can be reciprocally tuned on the basis of a rigid ratio, but if necessary capable of being controlled also

  variably during the translational movement.

  So that in the event of a breakdown or a disturbance of the electric motor 24, at least one movement of opening the door is possible without effort, a backup drive system 46 is provided in addition to the electric motor 24, system which normally turns "unladen" and which reinforces or replaces the electric motor 24 in the event of a disturbance. The support arm 10 and the support piece 14 can also form a unit. In this case, the pivot axis D is on the line connecting the axes

of articulation 32 and 38.

Claims (7)

  1. Door system, in particular for an airplane passenger version, comprising a support and pivoting device disposed between the door panel and the door frame as well as a translation device which moves the door panel at the end of the closing movement transversely to the pivoting direction to bring it along a curved translation trajectory to the fully closed position with engagement in form complementarity with receiving elements integral with the door frame and bring it, at the start of the opening movement, by translation in the opposite direction, out of engagement with said receiving elements, characterized in that the translation device (18) has a double drive system (20) guiding the panel door (2) along the curved translation path, and comprising a first drive element (26) controlling the height movement of the door panel e t at least one second drive element (30) acting obliquely to the first and controlling the transverse movement of the door panel as a function of the trajectory of curved translation.   2. Door system according to claim 1, characterized in that the two drive elements (26, 30) are driven by a drive unit (24) common to travel speeds reciprocally granted as a function of the path of curved translation.   3. Door system according to claim 1 or 2, characterized in that the double drive system (20) is connected on the one hand hinged to the door panel (2) and on the other hand through the drive elements (26, 30) adjustable in height and in a direction transverse to the device support and pivoting (10, 14).   4. Door system according to claim i or 2, characterized in that the double drive system (20) is disposed between the door frame (12) and the   support and pivoting device (10, 14).   5. Door system according to any one of   previous claims, characterized in that it   comprises, in addition to the double drive system (20), an emergency drive system (46) for at least one   opening translation of the door panel (2).   6. Door system according to any one of   previous claims, characterized in that the   double drive system (20) is drive electric.   7. Door system according to any one of   previous claims, characterized in that at   at least one drive element of the double drive system (20) is constituted by a drive screw and guide (26).