FR2823785A1 - Door for controlled atmosphere room comprises leaf pivoting on articulations comprising fixed part fixed on frame and movable part fixed on leaf, shaft centered on leaf pivoting axis coupled to rotational drive outside room - Google Patents

Abstract

The door for a controlled atmosphere room comprises a leaf (1) pivoting on articulations comprising a fixed part (5) fixed on the doorframe (2) and a movable part (6,7) fixed on the leaf. It comprises a shaft (8), centered on the leaf pivoting axis (20), which is integral with the movable part of the articulation and passes in a sealed manner through the upper (4) wall of the room so as to be coupled to a shaft rotational drive (11) located outside the room.

Description

each end and into which resin is injected.

  The present invention relates to the design and production of doors intended to effect a sealed closure of rooms with controlled atmosphere or other confined spaces, such as so-called clean rooms which, in hospitals for example, must be protected from viruses and external germs and all the interior surfaces of which must be easily decontaminable. Similar clean rooms also exist in certain factory workshops which must be kept dustproof, particularly in the field of semi-trailer manufacturing.

o drivers.

  The invention relates more particularly to automatically operating doors which therefore comprise a drive device which rotates the door leaf (s) to

open and / or close it.

  The device for driving the leaves of known clean room doors has a relatively large size, which can create problems. Furthermore, its operation can lead to the creation of dust or other

  pollutants that require the provision of a waterproof case.

  o Because the drive device, for example a motor and its controls, are in the protected room, maintenance and repair operations on the door prevent the use of the protected room during these operations, so in addition that they are all the more frequent as the device comprises mobile parts which run the risk of additional pollution and make it particularly difficult to carry out

  a good seal against them.

  The invention therefore proposes to provide a watertight closing door of the type mentioned above which avoids the various "', o drawbacks entailed by the presence of drive systems for door leaves in the protected space and whose interview is

very easy to make.

  To this end, the subject of the present invention is a door for sealing a room with a controlled atmosphere or other confined enclosure, which comprises, in itself in a conventional manner, at least one leaf pivotally mounted by means of at least one articulation. comprising a fixed part fixed on the door frame, such as a hinge blade or a hinge, and a movable part fixed on the door leaf, such as the second hinge blade or a hinge cooperating with said hinge , so as to pivot about a vertical pivot axis, such as the axis of the pin of a hinge or that of the hinge plug. The door according to the invention is characterized in that it comprises a shaft o centered on the pivot axis of said leaf, which is integral with said movable part and which crosses in leaktight manner an upper or lower wall of the enclosure for to be coupled to a device for rotating the said shaft arranged outside

  of the enclosure beyond said wall.

  s As a result, all of the door's drive and control devices can be placed outside the protected room, for example above its ceiling. There is therefore no longer any congestion problem or problem of neutralization of the

  protected room for maintenance and / or repair operations.

  o In addition, it overcomes the problems posed by conventional motion transmission systems, for example by their movable members such as chains or belts, in particular in terms of lubrication, wear, creation of dust, or

need cleaning and repair.

  s According to another characteristic of the invention, the drive device comprises a motor and the motor shaft constituted by the output shaft of said motor rotates a first pulley, the rotation of which is transmitted to a second pulley carried by the the door pivoting shaft through a belt. This transmission mode allows the automatic drive device, generally an electric motor, to be installed at any location outside the protected enclosure, so that it can

  be easily accessible for maintenance or repair.

  According to another characteristic of the invention, the control circuit of the motor of the drive device comprises a timing circuit which is triggered by the command to activate the motor and which provides an alarm when the hardness of

  the activation of the motor exceeds said predetermined duration.

  This arrangement makes it possible to stop the engine and warn users in the event of an engine failure or if the transmission device between the engine and the pivoting shaft of the door has failed, for example when a drive belt transmission of the rotary motion of the motor shaft is relaxed. Advantageously, an end-of-travel detector for pivoting the door leaf (s) is provided which stops the activation of the motor and resets the

timing circuit to zero.

  According to yet another characteristic of the invention, the drive device is a door closer, that is to say a device which automatically closes the leaf of the door. Such a device can, for example, be constituted by a door closer with a rotary hydraulic spring. In this case, the door is opened manually and closes automatically. This is particularly advantageous in the case where the part is protected

  by an airlock comprising two successive doors.

  The invention will now be more fully described in the context of preferred characteristics and their advantages, with reference to the appended figures, in which: FIG. 1 is a front view of a door according to the invention, s- Figure 2 is a top view corresponding to Figure 1 with the door in the open position, - Figure 3 is a detail view of the door drive, - Figure 4 is a detail view of 'a hinge according to the invention, the figure represents an embodiment of the invention in which the articulation of the door is a hinged articulation, - and Figure 6 represents the diagram of a device for controlling the opening and closing of the two doors of an airlock. We see in Figures 1 and 2 a door with a leaf 1 which is placed in a sealed manner in the frame 2 so as to isolate an enclosure illustrated by a clean room 3 disposed beyond the leaf 1 and which we partially see the ceiling 4. The leaf 1 is articulated on the jamb 2 by means of three articulations which include a fixed part 5 such that a hinge which is fixed on the jamb 2. Each articulation comprises a movable cooperating part, for example a hinge

  6, which is mounted on the hinge 5 and which is fixed on the leaf 1.

  According to the invention, at least one of the movable parts of the hinge joint 1, in the embodiment the third upper hinge 7, comprises a shaft 8 which is

  centered on the pivot axis 20 of the leaf joint, that is

  ie on the hinge axis 5. This pivoting shaft 8 extends beyond

  beyond the leaf 1 so as to pass through the upper wall of the enclosure formed by the ceiling 4. The upper end 9 of o the pivoting shaft 8 of the door is thus arranged above the

  ceiling 4, i.e. outside the clean room 3.

  The pivoting shaft 8, which is integral with the leaf 1 by means of the movable hinge 6 and therefore fixed in rotation with the leaf, can be rotated by a drive device shown diagrammatically at 11, which is arranged at- above the ceiling 4 outside the clean room 3. The shaft 8 passes through the ceiling by means of a crossing joint 10 which provides the same seal as that produced by the door when the latter is closed. n / a FIG. 3 is a detailed view of the upper part of the shaft 8 which crosses the ceiling 4 in a leaktight manner, by means of a bushing joint 12 similar to the joint of

crossing 10 in FIG. 1.

  In accordance with the embodiment chosen to illustrate the invention, the pivoting shaft 8 is rotated to rotate the leaf 1 by a drive device such as an electric motor 13, the rotary output shaft of which constitutes l motor shaft to which the shaft 8 is connected by means of a belt transmission device. Such a transmission makes it possible to place the drive motor 13 in an optimal location where it will be easily accessible for maintenance and / or repair operations. In the example shown, the transmission comprises a belt 14 which meshes on a toothed pulley 15 secured to the pivoting shaft 8 and on a toothed pulley 16 secured to the shaft of the

motor 13.

  As can be seen in Figure 4, which shows a partial representation of a hinge joint and hinges according to the invention, the upper hinge 7 is reinforced by a bracket 17 which extends to the upper end leaf 1 and which has a horizontal angle side 18 which is fixed on the

  upper edge 19 of the upright 1 (see FIG. 2).

  FIG. 5 represents another embodiment of the invention, in which the door articulation device is constituted by a hinge comprising a first fixed blade 21 fixed on the jamb 2 and a movable blade 22 fixed on the upright 1 The fixed blade 21 is secured to the central knuckle 23 and the movable blade 22 is secured to the upper knuckles 24 and lower 25. A pivoting shaft 26, which is centered on the assembly pin (not visible in FIG. 6) of the hinge and, consequently, on the pivot axis 20 of the articulation, is integral with the movable blade 22 and the upper knuckle 24. Its upper end 27 is

  arranged above the ceiling 4 outside the clean room 2.

  so The invention applies, in particular to the case where the access to the controlled room is made by an airlock comprising two successive watertight doors, the door already described being for this purpose coupled with a similar door to form said sound. FIG. 6 shows a diagram of a device for controlling the opening and closing of the two doors of an airlock. Each of the two doors of the airlock is controlled by a motor 28, or 29 respectively, which is

  arranged outside the ceiling 4.

  These two motors 28 and 29 are controlled by a logic circuit 31 which receives information from control devices 32 and 33 which are constituted by switches

  capacitive button or photo-barrier crossing detectors

  electric. Remote control devices of this type are advantageous in that their operation does not affect the sealing achieved in the room. The logic circuit 31 also receives information from detectors 34 to 37 which detect the

  closed or open position of each door.

  All the signals from the control devices 32 and 33 and the detectors 34 to 37 are sent to the logic circuit 31 by means of a cable 38 which passes tightly through the ceiling 4. The logic circuit 31 is also connected two timing circuits 39 and 41 which are each associated with one of the sound gates. These delay circuits are set to a duration which is slightly greater than the duration necessary for

  obtain the complete opening or closing of the door in question.

  o When the opening, or closing, of a door controlled by one of the control devices 32 and 33 is activated, this associated time delay is initialized. Normally, when one of the detectors indicates that the opening or closing operation is complete, the corresponding motor is stopped and the timing circuit is reset to zero. On the other hand, if the opening or closing operation is not carried out within the expected time, which is less than the threshold determined for the delay circuit, when this threshold is reached, the delay circuit will stop the engine and issuing an alarm signal indicating that the

  so drive device is not working properly.

  Maintenance services can then access the engine and the movement transmission devices and circuits

  control units arranged outside the clean room.

  For this maintenance and possibly repair operation, the technicians do not have to enter the room

  white, so they do not contaminate this room.

  It can be seen that the invention makes it possible to have all the active elements for controlling the door outside the room to which the door gives access. This allows in particular to carry out maintenance and repair operations without the technicians having to enter the protected room, which can then be kept in service. This is particularly important in rooms with controlled atmosphere in many fields, in hospitals, in the electronics industry, especially for the manufacture of semiconductors, in the pharmaceutical industry, in the food industry or the nuclear industry. Removing elements and controls from a door in a room

  avoids complicating and disrupting decontamination operations.

  This also has an aesthetic advantage which may interest

the decorators.

  It is already clear from the above that the invention is not limited to the modes of implementation which have been specifically described in the course of the examples above and that it extends, on the contrary, to any variant passing through equivalent means. In particular, the whole of the door control device, namely essentially the motors and the associated mechanical movement transmission members, can be arranged under the floor constituting the interior wall of the protected clean room rather than above its ceiling. This is particularly advantageous in the case where the protected room is a technical room, such as a computer room, which has a raised floor under which the various cables are placed.

o connection of devices.

  Furthermore, the drive motor of the door with a rotary motor shaft can be replaced by a door closer, that is to say a device ensuring automatically the reclosing of the door when it has been opened. This device can be constituted in any conventional manner in itself, in particular by any door closer with a hydraulic shock-absorbing cylinder, however indicating a preference.

for those who are rotary type.

  The system for transmitting the rotational movement between the motor shaft and the door pivot shaft, which has been described as preferably being of the pulley and belt type, can

  also be constituted by a chain and cogwheel device.

  The first solution facilitates the achievement of self-lubrication and monitoring of wear conditions. The two solutions have in common the advantage of good mounting flexibility, the motor o being able to be arranged at an adjustable distance from the pivot axis of

  the door ordered and in an orientation as anyone.

Claims (9)

  1. Door for sealing a room with controlled atmosphere or other confined enclosure (3), comprising at least one leaf (1) pivotally mounted by means of at least one articulation (5 to 7; 21 to 25) comprising a fixed part (5; 21, 23) fixed on the door frame (2), such as a hinge blade (21) or a hinge (5), and a mobile part (6, 7; 22, 24, 25) fixed on the door leaf (1), such as the second blade (22) of a hinge or a hinge (6, 7) cooperating with o said hinge, so as to pivot around an axis of vertical pivoting (20), such as the axis of the hinge pin (21 to 25) or that of the hinge plug (5), characterized in that it comprises a shaft (8), centered on the pivot axis (20) of said leaf, which is integral with said movable part (6, 7; 22, 24, 25) and which sealingly passes through an upper or lower wall (4) of the enclosure (3) for s '' couple to a drive device in rotation (11; 13 to 16; 28, 29) of said shaft (8)   d isposed outside the enclosure (3) beyond the lad ite wall (4).   2. Door according to claim 1, characterized in that o the drive device (11) comprises a motor (13) whose output drive shaft rotates a first pulley (16) whose rotation is transmitted to a second pulley (15) carried by the pivoting shaft (8) of the door by means of a belt (14).   3. Door according to claim 2, characterized in that the motor control circuit (28, 29) comprises a timing circuit (39, 41) which is triggered by the control of the activation of the motor (28, 29) and which provides an alarm when the duration of the activation of the motor (28, 29) exceeds a predetermined threshold. 4. Door according to claim 3, characterized in that it comprises an end-of-stroke detector (34 to 37) of the pivoting of the leaf (1), which stops the actuation of the motor (28,   29) and resets the timer circuit (39, 41) to zero.   5. Door according to any one of claims 1 to 4,   characterized in that the drive device (11) is a door-closing device which automatically recloses the   the door when it was opened.   6. Door according to claim 5, characterized in that   o the door closer is with rotary hydraulic spring.   7. Door according to any one of the claims   above, characterized in that the wall traversed by said tree is formed by the ceiling of a clean room constituting said enclosure (3).   8. Door according to claim 7, characterized in that the movable part of the articulation (6, 7; 22, 24, 25) comprises a reinforcement bracket (17) fixed on the upper edge (19) of said leaf (1).   9. Door according to any one of claims   o previous, characterized in that it is coupled with another similar door to form a sound comprising two successive doors. Vicarious