FR2847611A1 - Lock for sliding door with an automatic return mechanism used on public transport, uses lock with hook that is clear of passage when door is open and which operates in conjunction with gas spring used as automatic closer - Google Patents

Abstract

The lock (1) for a sliding door (2) fitted with an automatic return mechanism (3) has mechanism (8), operated by a handle (4), positioned on the upper part of the door clear of the region where people pass. The lock has a control (14) that can keep the door locked or unlocked. The lock operates in conjunction with a gas spring (22) return device with a hydraulic chamber.

Description

X r 2847611 The present invention relates to a device for

  sliding door lock fitted with an automatic return mechanism. The sliding doors intended to be equipped with this particular locking device are of the manual opening type, and they may be suitable for locking in cramped parts such as toilets, in particular in means of transport such as trains,

  coaches, airplanes or even boats.

  Current locking mechanisms for sliding doors include a strike, often in the form of a hook, fixed to the door frame and receiving the bolt with a lock to keep the door closed. When such doors are opened, this hook protrudes from the jamb. Furthermore, the hook of the current locking mechanisms is located substantially in the extension of the latch allowing a user to lock or unlock the door, that is to say halfway up the door. This position of the hook is quite unsightly and it also generates possibilities of attachment or even injury

  when a person crosses the threshold of this type of door.

  The object of the present invention is to provide a locking device for a sliding door with manual opening which makes it possible to avoid the problems of snagging and which makes it possible to obtain better aesthetics. It should also be

  mechanism has great reliability and ensures maximum security.

  The present invention eliminates the aforementioned drawbacks and solves the problems indicated above, as well as others, by providing a locking device for a door whose keeper, hereinafter designated "locking means", does not obstruct the clear of passage of the door. The solution provided therefore consists in moving the locking means out of the clear passage. This solution goes against the previous teaching that the locking latch and the strike are usually placed close to each other

  especially for reasons of simplicity.

  The invention therefore relates to a locking device for a sliding door with manual opening provided with an automatic return mechanism, comprising a means for locking the door actuated by an operating system, said means

  of locking being movable about an axis integral with the door.

  According to the invention, said locking means is disposed on the upper part of the door, outside the passage clear; this makes it possible to remove any locking device at the level of the frame visible from the sliding door, to avoid t r 2847611 injuries and friction to a person passing the threshold of the door, and

  offer a more aesthetic door light.

  In particular embodiments which can be taken in isolation or in all their technically possible combinations and each presenting specific advantages: - the door operating system comprises a manual control, the movements of which cause the rotation of the locking means thanks to the interposition of a connecting rod housed inside the door panel, the locking device comprises a movable bolt, the active position of which prevents translation of the locking means when the manual control is actuated and the door is closed, - The rotation of the locking means triggers a control member which causes the translation of the core of an electromagnet, leading the movable bolt to its active position which prevents the translation of the locking means. The variation in position of the locking means during its rotation is of the order of a few millimeters, this makes it possible to lock the door from a low amplitude rotation of the control member, - the locking device comprises a control device making it possible to prevent manual deactivation of the locking means when certain conditions programmed in said control device are fulfilled. This allows the door to be locked arbitrarily, without human intervention, when conditions

  programmed in the control device are fulfilled.

  the control device immobilizes the locking means in

  acting on the electrical supply of the electromagnet.

  - the automatic return mechanism includes a gas spring with hydraulic chamber intended to return the door to the closed position. This allows you to control the closing speed of the door, to open the door with less effort and

  to secure the operation of the locking means of the latter.

  The invention also relates to a sliding door with manual opening provided with an automatic return mechanism and comprising a locking device such

as defined above.

  The invention will be described in more detail by way of illustration and in no way limitative, with reference to particular embodiments shown in the accompanying drawings in which

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  - Figure 1 is a diagram of the locking device according to the invention associated with a sliding door; - Figures 1A and 1B show a part of the locking device according to the invention, in the unlocked position (Figure 1A) and in the locked position (Figure 1B); - Figure 2 is a possible embodiment of part of the locking device according to the invention;

  - Figure 3 is a detail of Figure 2.

  In the description which follows as well as on the drawings and in order to bring them

  for the sake of brevity and clarity, the same reference numbers are used to

  designate identical members or objects of the locking device.

  As shown in Figure 1, the locking device 1 is associated with a sliding door 2, which is subjected to a return mechanism 3

automatic in closed position.

  The locking device 1 comprises an operating system 4 which is integrated into the door 2 and which is composed of a manual control means 5, for example in the form of a latch, and of a connecting rod 6 interposed between said means manual control 5 and a fixing point 7. This fixing point 7 is located on

  the locking means 8 of the door 2, which is in the form of a hook.

  This hook 8 is mounted on a rotation axis 9 integral with the door 2, located between the fixing point 7 and the active part of said hook. In this way, the locking means 8 is itself secured to the door, connected to the operating system 4

  and movable by rotation around axis 9.

  The locking device 1 also comprises a movable bolt 10, connected to an electromagnet 11 whose core is also movable. The movement of the core of the electromagnet 11 is under the control of a control member 12, for example in

  switch form, actuated by the locking means 8.

  The information coming from the control member 12 passes through a control device 14, for example in the form of an electronic control board for programmable management. This control device 14 is connected to the electrical supply of

the electromagnet 11.

  The door 2 is attached to a mobile carriage 15, by means of anchoring structures 16 of the screw / nut type. The carriage 15 is equipped with rollers of

  guide 17 making it possible to slide the door 2 along a horizontal fixed rail 18.

  The automatic return mechanism 3 of the door 2 comprises: - a lifting beam 19 interposed in an articulated manner between the movable carriage 15 and a fixed inclined rail 20, this lifting beam 19 being in abutment on the inclined rail 20 by means of a roller 21, and - an elastic return system 22, preferably in the form of a gas spring, with hydraulic chamber, interposed in an articulated manner between the lifter 19 and the carriage

mobile 15.

  The assembly forms a triangle whose side corresponding to the jack 22 has a variable length, this variation in length being linked to the position of the roller 21 along the rail.

fixed inclined 20.

  The operation of the recall mechanism 3 is as follows: by default, when no action is carried out on the door 2, the latter is in the closed position thanks to the automatic recall device 3. When the door is opened by a user , by simple pulling or pushing causing its translation, the jack 22 is compressed due to the inclination of the fixed rail 20; when the user releases the door 2, the actuator 22 will tend to return to its initial position, and therefore return the door to the closed position. When the door 2 is closed, and it is desired to lock this position, the manual control means 5 are actuated in the form of a latch; a slight movement of the connecting rod 6 is then induced which is transmitted to the locking hook 8 in the form of a rotational movement through the fixing point 7 and

the joint 9.

  This variation in position of the locking means 8 induces a variation in the position of the control member 12. This member 12 controls the movement of the core of the electromagnet 11, via the management plate 14, in turn causing the movement of the movable bolt 10 from an unlocked position (FIG. 1A) to a locked position

(Figure 1 B).

  When the movable bolt 10 is in the locked position, the translation of the hook 8 is made impossible; consequently, the opening of the door 2 is prohibited since the axis 9 of the locking means 8 and the door 2 are integral with one another; When you want to unlock door 2, you actuate the latch 5 to

  deactivate the control member 12 via the locking hook 8.

  The member 12 controls the movement of the electromagnet 11 causing the

unlocking the movable bolt 10.

  The movement of the locking hook 8 at the level of the control member 12 can be only a few millimeters (for example 3 to 5 mm), this movement having to be sufficient simply to activate or deactivate said member

12.

  The electronic control board 14 can be programmed to prevent, under certain conditions, the movements of the core of the electromagnet 11 by acting on the electrical supply thereof. If the corresponding conditions are fulfilled, the locking or unlocking of door 2 will prove impossible.

  even when an intervention on the manual control means 5 is carried out.

  The blocking of the door 2 thus produced is of particular interest in the case where this sliding door is intended to equip the toilets with a means of transport for example. It is then possible to program the control device 14 so that the door 2 is blocked, in particular in the case where the means of transport is immobilized or runs at a reduced speed (for example under 10 km / h for a train), when an electrical supply fault appears, when any malfunction is detected inside the room closed by door 2, or other The manual control means 5 can consist of a conventional latch and discreet placed halfway up door 2, inside of the room; it actuates an operating rod 6 integrated in the door panel 2 and which consequently cannot be seen. Thus, as the locking hook 8 and its control means 10, 11, 12, 14 are placed in the upper part of the door, preferably integrated into walls or masked by suitable panels, a door is obtained whose clear

  passage is completely free, secure and aesthetic.

  Figures 2 and 3 illustrate in more detail a possible embodiment of a locking device according to the invention intended to equip a door (not shown) provided with an automatic return means 3 in the closed position. The locking device in question can operate with a sliding door 2, an operating device 4 and a control means 14 as described.

in figure 1.

  In these two figures, we find the locking device 1 provided with the closing hook 8 carried by the movable carriage 15 capable of supporting a sliding door. This closing hook 8 comprises a point 7 allowing attachment to an operating system integrated in the sliding door, as well as an axis of rotation 9 secured to the movable carriage 15. In this way, the hook 8 is secured to the door, connected to

  maneuvering and mobile system by rotation around axis 9.

  In this locking device, there is also the control member 12 in the form of a lamella type switch connected to the electromagnet 11 provided with the movable bolt intended to cooperate with the closing hook 8. A control plate 14 is

connected to the electromagnet 11.

  The structure of the control of the movable bolt 10 by the electromagnet 11, via a lever arm system 24, has here been adapted to limit the size of the control mechanism. In Figures 2 and 3, we note that the locking hook 8 is equipped

  a roller 25 making it possible to optimize the guidance of the mobile carriage 15 on the fixed rail 18.

  An opening 26 has been arranged in the horizontal fixed rail 18, adapted so that the roller 25 is not in contact with said fixed rail 18, in the closed door position,

  so as not to hinder the pivoting of the hook 8.

  The mobile carriage 15 consists of an L-shaped angle iron guided on the horizontal fixed rail 18 by means of different rollers 17; preferably, some of these rollers 17 are supported on the lower part of the rail 18, and others on its upper part, mounted on eccentric systems to allow their position adjustment and

thus optimize the guidance.

  In FIG. 2, there is again the automatic return mechanism 3, with - the spreader 19 articulated at one of its ends on the mobile carriage 15 and provided, at its other end, with the roller 21 guided by the inclined fixed rail 20, and - the cylinder 22, of the gas type provided with a hydraulic chamber, mounted on ball joints, on the one hand on

  said spreader 19, and on the other hand, on the mobile carriage 15.

  As explained above, if no force is applied to the door, the latter is in the closed position thanks to the automatic return device 3; the

  hook 8 is not locked by the movable bolt 10.

  If it is desired to lock this door, the operating system is actuated to cause a very slight pivoting of the hook 8 about its hinge axis 9; this slight pivoting is possible, because in the closed door position, the roller 25 is located in the opening 26 and is not in contact with the horizontal fixed rail 18. This slight pivoting of the hook 8 actuates the switch 12 which sends a message to the electromagnet 11. The core of the electromagnet 11 actuates the bolt 10 which passes from a low, unlocked position, shown in FIG. 2, to a high, locked position, not shown. This high position of the bolt 10 prevents the translation of the hook 8, of the carriage 15 and therefore the opening of the door. When the operating system is actuated in the other direction, this results in a slight pivoting of the hook 8 which deactivates the switch 12. This switch 12 sends a different signal to

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  the electromagnet 11 which swivels the bolt 10 to a low, unlocked position,

  in which the translation of the hook is possible.

Claims (10)

- CLAIMS   1.- Locking device for sliding door (2) with manual opening provided with an automatic return mechanism (3), which device comprises a locking means (8) of the door (2) actuated by an operating system ( 4), said locking means (8) being movable about an axis (9) integral with the door (2), characterized in that said locking means (8) is disposed on the part   upper door (2), outside the clear passage of said door.   2. Locking device according to claim 1, characterized in that the operating system (4) of the door (2) comprises a manual control (5) whose movements cause the rotation of the locking means (8) by l 'intermediate   a connecting rod (6) housed inside the door panel (2).   3. A locking device according to any one of claims 1 or 2,   characterized in that it comprises a movable bolt (10) whose active position prevents translation of the locking means (8) when the manual control (5) is   pressed and the door (2) is closed.   4. Locking device according to claim 3, characterized in that the rotation of the locking means (8) triggers a control member (12) causing the translation of the core of an electromagnet (11), driving the movable bolt   (10) towards its active position which prevents the translation of the locking means (8).   5. Locking device according to claim 4, characterized in that the control member (12) acts on the electromagnet (11) via a control device (14).   6. A locking device according to any one of claims 4 or 5,   characterized in that the position variation of the locking means (8) during its rotation is of the order of a few millimeters, said position variation being   adapted to activate or deactivate the control member (12).   7. A locking device according to any one of claims 1 to 6,   characterized in that it comprises a control device (14), capable of preventing the manual deactivation of the locking means (8), when certain conditions   programmed in said control device (14) are fulfilled.   8.- Locking device according to claims 5 or 7, characterized in that   that the control device (14) causes the immobilization of the locking means (8)   by acting on the electrical supply of the electromagnet (11). 284761 1   9. A locking device according to any one of claims 1 to 8,   characterized in that the automatic return mechanism (3) comprises a spring with   gas (22) with hydraulic chamber intended to return the door (2) to the closed position.   10.- Sliding door with manual opening provided with an automatic return mechanism (3), characterized in that it comprises a locking device (1)   according to one of claims 1 to 9.