SYSTEM FOR LOCKING A SCREEN DOOR LEAF

Abstract

A system for locking a platform screen door leaf, the leaf being capable of moving by a horizontal translational movement in a plane of the leaf between open and closed positions, including a bearing rail mounted on the leaf and having a reception recess, a motor body forming the stator of a drive motor of the leaf and mounted freely in rotation about a motor axis on a gear unit, a locking roller mounted projecting on the motor body and arranged so as to roll along the bearing rail during a movement of the leaf, and engage, by a rotation of the motor body, in the reception recess when the leaf reaches the closed position or the open position, in order to lock.

Claims

1. A system for locking a platform screen door sliding leaf, the sliding leaf being capable of moving relative to a fixed panel by a horizontal translational movement in a plane of the leaf between open and closed positions in which the leaf at least partly frees or obstructs an opening adjacent to the fixed panel, wherein the locking system comprises: a bearing rail mounted fixed on the sliding leaf and comprising a reception recess; a motor body forming the stator of a drive motor of the sliding leaf and mounted freely in rotation about a motor axis on a gear unit; a locking roller mounted projecting on the motor body and arranged so as to: roll along the bearing rail during a movement of the sliding leaf; and engage, by a rotation of the motor body, in the reception recess when the sliding leaf reaches a given position, in order to lock it, the reception recess being arranged on the bearing rail so that this given position is the closed position or the open position.

2. The locking system as claimed in claim 1, wherein the reception recess is arranged at one end of the bearing rail so that the given position is the closed position.

3. The locking system as claimed in claim 1, wherein the bearing rail comprises an additional reception recess, the two reception recesses being arranged on the bearing rail so that, in order to lock the sliding leaf, the locking roller engages, by the rotation of the motor body, in a first of the reception recesses when the sliding leaf reaches the closed position, and in a second of the reception recesses when the sliding leaf reaches the open position.

4. The locking system as claimed in claim 1, wherein the gear unit has a lateral output having a given axis.

5. The locking system as claimed in claim 4, wherein the gear unit has an input, referred to as the input of the gear unit, for carrying out driving of the lateral output, the gear unit comprising a reducer making it possible to have a smaller rotation at said lateral output than at the input of the gear unit.

6. The locking system as claimed in claim 5, wherein the motor is mounted in rotation on the reducer.

7. The locking system as claimed in claim 4, wherein the lateral output comprises a drive pulley of a belt.

8. The locking system as claimed in claim 1, wherein it comprises a coupling device for mounting the motor body on the gear unit.

9. The locking system as claimed in claim 1, wherein it comprises a resilient element for restoring the locking roller into the reception recess.

10. The locking system as claimed in claim 1, wherein it comprises a stop mounted projecting on the motor body and arranged so as to limit a rotation of the motor body during release of the locking roller from the reception recess.

11. The locking system as claimed in claim 1, further comprising a manual unlocking mechanism.

12. The locking system as claimed in claim 11, wherein the manual unlocking mechanism comprises: on the one hand, a cam secured to the motor body; on the other hand, an inclined ramp, the manual unlocking mechanism being arranged so that a movement of the inclined ramp allows the inclined ramp to come in contact with the cam, the cam then sliding on the inclined ramp during its movement until the locking roller is released from the reception recess.

13. The locking system as claimed in claim 12, wherein the movement of the inclined ramp is substantially parallel to the motor axis.

14. A platform screen door comprising a fixed panel and a sliding leaf capable of moving relative to the fixed panel by a horizontal translational movement in a plane of the leaf between open and closed positions in which the leaf at least partly frees or obstructs an opening adjacent to the fixed panel, the platform screen door comprising a system for locking the sliding leaf at least in the open position as claimed in claim 1.

15. The screen door as claimed in claim 14, wherein the screen door comprises a belt drive system for driving the sliding leaf, the locking system being integrated in the motorization of the belt drive system.

16. The screen door as claimed in claim 15, wherein the gear unit has a lateral output having a given axis, wherein the lateral output comprises a drive pulley of a belt, and wherein said drive pulley drives the belt driving the sliding leaf.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Other characteristics and advantages of the disclosure will become apparent during the following description of an embodiment which is given purely by way of illustration. In the appended drawings:

[0043] FIG. 1 is a partial three-dimensional view of a system for driving a screen door sliding leaf, comprising a locking system according to the disclosure;

[0044] FIG. 2 is a three-dimensional view of the locking system according to the disclosure of FIG. 1;

[0045] FIG. 3 is a partial view in longitudinal section of the locking system of FIG. 2;

[0046] FIG. 4 is a view in section along IV-IV of the locking system of FIG. 2; and

[0047] FIG. 5 is a partial three-dimensional view illustrating a manual unlocking mechanism of the locking system of FIG. 2.

DETAILED DESCRIPTION

[0048] In the rest of the description, we will describe a locking system 1 according to the disclosure integrated in a platform screen door comprising a belt drive system 2 for driving the sliding leaf or leaves. Such a belt drive system 2 is described in detail in Document FR3039581 or else, in a variant, in Document CN203361842, which documents may be referred to for further information. Without describing it in more detail here, referring to FIG. 1 the belt drive system 2 connects the two screen door sliding leaves 210. To this end, two belts 6 and 7 for driving the leaves 210 run below a door threshold between the two fixed panels of the screen door. A drive pulley 4, driven by a motor 12 via a gear unit 30, cooperates with the first belt 6 in order to move one of the sliding leaves 210, the other of the sliding leaves 210 being driven via the second belt 7 by one of the sliding leaves 210 in a symmetrical and synchronized fashion.

[0049] The embodiment of the locking system 1 according to the disclosure is, in this case, integrated in the motorization of the belt drive system 2. The locking system 1 according to the disclosure comprises a bearing rail 3, which is secured to the sliding leaf 210 adjacent to the motorization. At one end of the bearing rail 3, the latter comprises a reception recess 31: this reception recess 31 is positioned so that, in the closed position of the sliding leaf 210, the reception recess 31 is placed along the motor 12 (as illustrated in FIG. 1): the bearing rail 3 and the reception recess 31 follow the sliding leaf 210 in these movements between its closed and open positions.

[0050] Referring to FIGS. 2 to 4, the locking system 1 according to the disclosure comprises a support 10 for fastening the locking system 1 according to the disclosure on a fixed panel of the screen door relative to which the sliding leaf 210 moves. On the other hand, the locking system 1 according to the disclosure comprises a gear unit 30, of which a lateral output of axis P comprises the drive pulley 4 of the belt 6. The gear unit 30 is in this case secured to the fastening support 10. The locking system 1 according to the disclosure furthermore comprises a motor 12 having a motor body 20 forming the stator and extending along a longitudinal axis M, referred to as the motor axis, coaxial with a rotor axis of the motor 12. At an output of the rotor axis, the motor body 20 comprises a ring 21 which cooperates with a coupling device 40, in this case a ball bearing, allowing the motor body 20 to be mounted freely in rotation on the gear unit 30, the rotor axis of the motor 12 cooperating with an input of the gear unit 30 in order to carry out driving of the lateral output P. It should be noted that the axis of the lateral output P is perpendicular to the motor axis M. Thus, as soon as a motor torque is applied by the motor 12, the motor body 20 is driven in rotation about the axis M, while the rotor remains stationary.

[0051] In a manner which is not represented, the gear unit may comprise a reducer making it possible to have a smaller rotation at said lateral output P than at the input of the gear unit 30. In particular, the motor may be mounted in rotation on the reducer.

[0052] For example, the reducer may form an angle gear making it possible to transmit the drive at the input of the gear unit 30 along the axis of the motor to said lateral output P.

[0053] In order to limit this rotation of the motor body 20 during a movement of the sliding leaf 210 from the closed position, the locking system 1 according to the disclosure comprises a stop 23 secured to the motor body 20 and extending in radial projection centrifugally from said motor body 20. The stop 23 comes to bear on a bearing part 11 of the fastening support 10. Once the stop 23 is bearing on the bearing part 11 of the fastening support 10, the motor body 20 resumes its function as a stator and the rotor of the motor 20 is set in rotational movement, driving the drive pulley 4 via the gear unit 30. In an alternative embodiment, the stop 23 is mounted in a similar way on the ring 21.

[0054] On the other hand, in order to limit the rotation of the motor body 20 during a movement of the sliding leaf 210 from the open position, the locking system 1 according to the disclosure comprises a locking roller 22 mounted at one end of an axle 221 secured to the ring 21 and extending in radial projection centrifugally from said ring 21. The locking roller 22 comes to bear on the bearing rail 3. Once the locking roller 22 is bearing on the bearing rail 3, the motor body 20 resumes its function as a stator and the rotor of the motor 20 is set in rotational movement, driving the drive pulley 4 via the gear unit 30. The sliding leaf 210 is then in translational movement from the open position to the closed position, and the locking roller 22 then rolls along on the bearing rail 3 in the direction of the reception recess 31. Once the closed position is reached by the sliding leaf 210, the locking roller 22 drops into the reception recess 31 under the effect of a residual motor torque. This locks the sliding leaf 210 in the closed position, the locking roller 22 coming to bear immediately on the sides of the reception recess 31, thus preventing any attempt at premature opening of said sliding leaf 210. In an alternative embodiment, the locking roller is mounted in a similar way on the motor body 20.

[0055] In order to ensure that the locking roller does not leave the reception recess 31, in the closed position of the sliding leaf 210, the locking system 1 according to the disclosure comprises a resilient restoring element 24, here in the form of a tension spring, acting along a direction substantially perpendicular to a radius of the ring 21 (or of the motor body 20). This resilient restoring element 24 is fixed at a first end 241 to the ring 21 (or as a variant to the motor body 20) and at a second end to the fastening support 10. This second end is not visible in FIG. 2, although it is possible to see a rod 242 which is fixed to the fastening support 10 and to which this second end is attached.

[0056] It should be noted that the relative positioning of the stop 23 and of the axle 221 carrying the locking roller 22 is such that, when the stop 23 comes to bear on the bearing part 11 of the fastening support 10, the locking roller 22 is released from the reception recess 31 then is at least in contact with the bearing rail 3, along which it can roll when the sliding leaf 210 is driven by the motor 12 from its closed position to its open position. Naturally, the motor torque making it possible to release the locking roller 22 from the reception recess 31 is greater than a restoring torque applied by the resilient restoring element 24.

[0057] Here, the stop 23 is therefore separate from the locking roller. According to an alternative embodiment which is not represented, however, the stop may be formed by the locking roller, the stop being arranged so as to be in contact with a rolling track arranged facing said bearing rail, when the locking roller is released from the recess. The locking roller is in this case arranged so as to roll both along the bearing rail and on the rolling track during the movement of the sliding leaf.

[0058] If necessary, the locking system 1 according to the disclosure comprises a manual unlocking mechanism. This mechanism comprises: [0059] on the one hand, a cam 25 secured to the motor body 20 or to the ring 21; [0060] on the other hand, an inclined ramp 82 maneuvered by a cable 80 fixed to a finger 81 of the inclined ramp 82.

[0061] Manual pulling of the cable 80 moves the inclined ramp 82, which comes in contact with the cam 25. As the pulling continues, the inclination of the inclined ramp 82 forces the body 20 of the motor, via the cam 25 sliding on the inclined ramp 82, to rotate about the axis M until at most the stop 23 comes to bear on the bearing part 11 of the fastening support 10, the locking roller 22 then being released from the reception recess 31.

[0062] It may be seen from the description above that such a structure of the locking system 1 according to the disclosure allows a significant reduction of the number of parts and simple installation, and makes it possible to avoid the use of a specific electromagnet and to use the drive motor of the sliding leaves directly controlling the locking/unlocking.

[0063] It should be noted that the bearing rail 3 may comprise an additional reception recess, which is not represented in the illustrated example but is positioned further to the right in relation to FIG. 1. The locking roller 22 engages in this additional recess when the sliding leaf 210 reaches the open position. It is then also possible to simplify blocking in the open position as well.

[0064] Naturally, numerous modifications may be made to the disclosure without thereby departing from its scope.