FR2758520A1 - DOOR SYSTEM, PARTICULARLY FOR A PASSENGER AIRCRAFT - Google Patents

Abstract

Door system, in particular for a passenger version aircraft, comprising a support device (10, 12) acting between the door panel (2) and the door frame (14) and supporting the door panel (2) with mobility pivotally, and a translation device (16) which is connected to the support device and moves the door panel at the end of the closing pivoting movement, transverse to the pivoting direction, in a curved translation path, at the fully closed position with engagement by complementarity of shape with receiving elements (4) integral with the door frame, and brings it, at the start of the opening movement, by a translation in the opposite direction, out of engagement with said elements (4). The translation device (16) and the support device (10, 12) comprise a common drive system (20-54), switched at the end of the opening translation between the support device (10, 12) and the translation device (16) .par.

Description

DOOR SYSTEM, PARTICULARLY FOR AN AIRPLANE

PASSENGER VERSION

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

reception elements.

  In a door system of this type known by patent US-A-5,163,639, separate electric motors, controlled by program, are provided for the different door functions, therefore raising and lowering, pivoting to close and the opening pivot and locking by complementarity of shape of the door panel in the fully closed position. This door system is unreliable because the failure of only one of the electric motors or the program control affects

  the operation of the door system as a whole.

  This is why, for safety reasons, door systems of the type defined above are, for the most part, actuated exclusively by hand through control linkages or else, as is known from the document DE 44 13 307 A1, by a single drive system with an electric motor which produces the translational movement of the door panel, while the other functions of the door and in particular the opening pivot and the closing pivot of the door panel door must be done manually, this

  which involves a relatively large effort.

  The object of the present invention is to produce a door system of the type defined above so that the functions of the door, in particular the pivoting and translational movements of the door panel, can be carried out by electric motor, and that '' a security of

  high performance is nevertheless assured.

  This object is achieved, according to the invention, by the fact that the translation device and the support device comprise a common drive system which is switched between the support device and the

  translation at the end of the opening translation.

  On the door system according to the invention, both the translation function and the pivoting function are assumed by a single motor drive system, which on the one hand makes it possible to significantly increase the operating comfort, compared to manual actuation, and on the other hand to reduce, to a large extent, the risk of an operational failure and to reduce the cost and the weight compared to a solution

  using several separate drive systems.

  According to another particularly preferred embodiment of the invention, the translation device is located, for mounting reasons, preferably between the support device and the door frame. In order to prevent inadvertent activation of the drive system when the door panel is pivoted open, in the raised translation position, the drive system includes a safety device against switching on the translation device when the

  door panel is opened by pivoting.

  Also for security reasons, the system

  is preferably mechanically switchable

  only. To allow automatic switching while

  authorizing a simple implementation of the drive system

  It is particularly advantageous that the drive system comprises two reciprocally coupled drive elements, permanently connected, from the drive point of view, on the one hand to the support device and, on the other hand, to the translation device. , elements among which that connected to the support device is automatically blocked during the translational movement of the door panel and is released at the end of the opening translation, while the drive element connected to the translation device is automatically blocked in the pivoting phase of the door panel and released at the end of the movement of

closing pivot.

  According to another particular embodiment

  Lely preferred of the invention, the drive system has, on the side of the translation device, a screw drive system which is incorporated into the translation kinematics as a guide element, which thus further reduces the means used and the weight. According to a particularly robust variant of the combined translation and pivoting drive system, in which the translation kinematics can also be obtained using non-linear guide elements, which can have essentially any curvature, for example in the form of curved guide rails, the drive system has, on the translation device side, a pinion / rack drive system, which may have a curved shape in

  depending on the shape of the guide elements.

  For safety reasons, the drive system preferably includes a main drive system and an emergency drive system, advantageously self-powered, which reinforces or replaces the main drive system in the event of failure and by which the door panel can be brought at least once from the fully closed position to the

  fully open position by pivoting.

  The drive system can be hydraulic or pneumatic or with an electric motor, which is

  preferable from the point of view of simplicity.

  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 according to the invention, the door panel being shown in the raised position, partially opened by pivoting; Figure 2 shows the door system of Figure 1 & the fully closed position of the door panel; Figure 3 is a partial view on a larger scale of the door system of Figure 1, with a system

  modified drive and pivot drive.

  The door system illustrated in the drawings is of the "plug" or "studded" type, that is to say that in the fully closed position, according to FIG. 2, the door panel 2 is lowered in view an engagement by complementarity of form between receiving elements 4 integral with the door frame and supports (or tenons) 6 fixed to the edge of the door frame; in view of the opening, the door panel 2 is first raised relative to the door opening 8 (arrow A) to be brought out of engagement by complementarity of form with the receiving elements 4 before being able to be released by pivoting outwards from the door opening 8 and then be moved essentially parallel to the outer contour of the fuselage at the position

  fully open (arrow B in Figure 1).

  The pivoting and support device necessary for this purpose comprises a support arm 10 on which the door panel 2 is suspended with angular mobility about a pivot axis S1, as well as a support piece 12 connected to the arm of support 10 with pivoting mobility about an axis S2 parallel to the pivot axis S1, this support piece being connected to the door frame 14 by passing through a translation device referenced 16 as a whole. During the movement phase B, the door panel 2 is guided by two connecting rods 14 acting between the door panel 2 and the

door frame 14.

  The translation and pivoting function is provided by a drive system 20, the housing 19 of which is fixed to the support arm 10 and which consists of a main drive system 22 with an electric motor and a system of emergency drive 24 which strengthens or replaces the main drive system in the event of a breakdown and which normally turns "idle" on the same axis as the main drive system 22. The pinion 26 of the drive system 20 is located in engagement with an intermediate pinion 28 mounted idly on the pivot axis S2 and meshing with the drive pinion 30 with a screw 32 which is rotatably mounted on the support piece 12 and whose nut 34 is fixed by a hinge 36 on the door frame 14. At the upper end, the support part 12 is guided movable in translation by a roller 38 in a guide slot 40. The geometry of the translation kinematics composed of the screw drive 32 , the articulation 36, the roller 38 and the guide slot 40 is chosen so that during the rotation of the screw 32, the door panel 2 is moved, together with the support device 10, 12, according to a translation path A curved as a function of the external contour of the fuselage of the aircraft, as indicated in FIG. 2 by the translation directions 0 and U of different inclinations of the upper edge 42 and the lower edge 44 of the panel door, the pivot axes Sl and S2 which swing during the translation of the door panel being,

  at the end of the opening translation, vertically oriented

  rigging in relation to a reference system integral with the aircraft. When the drive system 20 is activated in the fully closed position of the door panel 2 (FIG. 2), the screw 32 is driven, so that the support device 10, 12 and the door panel 2 are raised in the door opening 8. The reaction moment of the drive system 20 is taken up by the support arm 10, passing through the casing 19, but an opening by pivoting of the door panel 2 is first prevented by the engagement by complementarity of form of the supports 6 in the receiving elements 4 as well as, if necessary, in addition by the rollers 46 integral with the door panel and rolling in guide rails 48 corresponding to the door opening 8, up to at the end of the opening translation, defined by abutment, on the one hand between the rollers 46 and the guide rails 48 and, on the other hand, by the nut 34 coming to bear against the support piece 12. In this position in which the screw 32 can no longer rotate, the supports 6 are released from their grip by complementarity of form with the receiving elements 4 and the guide rollers 46 can be freely released towards the outside out of the guide rails 48. Since the intermediate pinion 28 is immobilized in rotation by the drive pinion 30, the pinion 26, when the drive system 20 continues to be activated, rotates like a satellite around the fixed intermediate pinion 28, so that the support arm 10 is is deployed around the pivot axis S2, which means that the door panel 2 is first released by pivoting outwards from the door opening 8 (FIG. 1) and then is pivoted into position full opening, basically

  parallel to the outer contour of the aircraft fuselage.

  To close the door, the drive system 20 is activated in the opposite direction, so that the functions described take place in reverse. In this regard, it must be guaranteed that during the pivoting phase of the door panel 2, the intermediate pinion 28 and the drive screw 32 remain angularly locked until the door panel 2 is fully engaged by pivoting in the bay. door 8. For this purpose, a locking lever 50 biased by spring is provided on the support piece 12, this lever engaging in a notch 52 of the intermediate pinion 28 as long as the door panel 2 is in the phase pivoting B. When the door panel 2 is pivoted in the door opening 8, the locking lever 50 is released from the notch 52, against the force of the spring, by a stop 54 of the support arm 10, so that the intermediate pinion 28 and the drive screw 32 can rotate freely and that the door panel 2, under the action of the drive system 20 continuing to rotate, is lowered again to the

  fully closed position (Figure 2).

  As long as the drive system 20 is stopped, the door panel 2 is locked in the closed position illustrated in FIG. 1, by the fact that the screw connection between the drive screw 32 and the nut 34 is self-locking. This guarantees that the door panel 2 cannot, under the effect of vibration or shock, come out of itself from the fully lowered translation position and thus reach out of grip by complementarity of form with the elements of reception

4, integral with the fuselage.

  According to FIG. 3, in place of the screw guide, there is provided, for the translation control of the support arm, a lower guide slot 56, integral with the door frame, and a roller 58. In this case, the support arm and the support piece 12 are made in one piece and the pivot axis S2 is located directly between the support arm 10 and the upper rollers 38 and lower 58 (joints 60 and 62). The drive system 20, the main drive 22 and backup 24 of which are again fixed on the housing side to the support arm 10, comprises a drive pinion 66 which is driven by a reduction gear 64 coaxially with the axis pivot S2, is engaged with a rack

68 secured to the door frame.

  When the drive system 20 is activated in the illustrated open position of the door, in which the drive pinion 66 is locked

  angularly, for example by a corresponding locking

  dant to that of Figure 1 (not shown in Figure 3), the support arm 10 pivots inward around the axis S2, under the effect of the torque acting on the side of the housing 19 of the drive system 20, until the door panel 2 is fully engaged in the door opening 8 and the locking is removed, and thereafter the drive pinion 66 rotates and moves downward on the rack 68 , so that the support arm 10 is lowered and pivots and the door panel 2 is moved to the fully closed position

  following a predefined curved translation trajectory

  terminated by the shape of the guide slots 40, 56 and the guide rails 48 (FIG. 1). At the end of the closing translation, the drive system 20 is stopped and the translation kinematics is locked, for example again thanks to the self-locking structure of the system

20.

  To open the door, the drive system 20 is activated in the opposite direction and the described functions of the door take place in reverse order. Furthermore, the structure and the mode of operation of the translation and pivoting system illustrated in FIG. 3 are the same as in the first exemplary embodiment.

Claims (9)

  1. Door system, in particular for an airplane passenger version, comprising a support device acting between the door panel and the door frame and supporting the door panel with pivoting mobility, and a translation device which is connected to the support device and moves the door panel at the end of the closing pivoting movement, transversely to the pivoting direction, along a curved translational path, to the fully closed position with engagement by complementarity of form with receiving elements integral with the door frame, and brings it, at the start of the opening movement, by a translation in the opposite direction, out of engagement with said receiving elements, characterized in that the translation device (16) and the support device (10, 12) comprise a common drive system (20), switched at the end of the opening translation between the support device rt and the device translation (10, 12; 16).   2. Door system according to claim 1, characterized in that the translation device (16) is arranged between the support device (10, 12) and the door frame (14).   3. Door system according to claim i or 2, characterized in that the drive system (20), when the door panel (2) is opened by pivoting, is locked against switching on the translation device (16).   4. Door system according to any one of   previous claims, characterized in that the   drive system (20) can be mechanically switched   only. 5. Door system according to any one of   previous claims, characterized in that the   drive system (20) has two components   drive (casing 19 and pinion 26) reciprocally coupled   cement, permanently connected from the drive point of view on the one hand to the support device (10, 12) and on the other hand to the translation device (16), elements among which the drive element ( 19) connected to the support device is automatically blocked during the translational movement of the door panel (2) and is released at the end of the opening translation, and the drive element (26) connected to the translation device (16) is automatically blocked during the pivoting phase of the door panel (2) and released at the end of the movement of closing pivot.   6. Door system according to any one of   previous claims, characterized in that the   drive system (20) includes a drive system   screw connection (32, 34) on the side of the translation device (16).   7. Door system according to any one of   previous claims, characterized in that the   drive system (20) includes a pinion system   rack (66, 68) on the side of the translation device (16).   8. Door system according to any one of   previous claims, characterized in that the   drive system (20) consists of a main drive system (22) and an emergency drive system (24) reinforcing or replacing the main system in case of failure.   9. Door system according to any one of   previous claims, characterized in that the   drive system (20) is electrically powered.