DE2228914A1 - HYDRAULICALLY CONTROLLED SLIDING DOOR WITH ELECTROMECHANICAL DRIVE - Google Patents

Description

PATENT Attorney DIPL.-ING. HANS LANGOSCH 7OOO STUTTGART HERDWEG 62 TELEPHONE (O711) 296523

22289U

company

United building hardware factories
Gretsch & Co. GmbH.

7250 Leonberg

Siemensstrasse 21-29

Hydraulically controllable sliding door with electromechanical drive

The invention relates to a sliding door with on one

Support rail for floating door leaves that

• ο

can be driven by an electric motor and the movement of which can be controlled by a hydraulic control device. In a known embodiment of this type there is the control device consists of a double-walled control cylinder, the inner wall of which has bores. at

3098 5 1/0274 G83O

ORIGINAL INSPECTED

22289U

With increasing door movement, there is a constant reduction in speed, at the end of the opening and closing movement the door leaves come into their rest position dampened. Since the length of the extension movement of the piston is dependent from the opening path of the door leaves and the end cushioning at the ends of the cylinder, it is necessary to that an adapted cylinder must be made for each opening width. Neither the measure nor the timing the damping can be adjusted later. After all, it is also not possible to have intermediate positions to bring about in the opening width.

The invention is based on the object of a hydraulically controllable, electromechanically movable sliding door to create their movement mechanism to simplify storage of all common sizes under Use of the same components as possible is easily adaptable. The speeds of door opening and closing should be easy to adjust independently of each other, as well as the speed reductions before the end positions. The usual requirements with regard to avoiding the risk of entrapment, the opening of the door in the event of a power failure, partial opening in winter and the like. Should be easy to meet.

309851/0274

To solve this problem, the invention provides that the electric motor is connected to a hydraulic element via a pulling loop and the hydraulic control device has at least two adjustable throttle points connected in series which influence the displacement of the liquid flow of the hydraulic element and one of the throttle points has a shut-off valve controllable via actuators is connected in parallel, with which this can be bridged depending on the door movement. In this way, both the closing speed and the opening speed of the door leaves can easily be adjusted, and the time of damping and the strength of the damping can be freely selected. In particular, the same components fit for each opening width , so that production and storage are greatly simplified.

In a particularly advantageous manner, there is the hydro element from a hydraulic pump that is driven by the electric motor via the pulling loop. A clever one, on a small scale Space can be accommodated arrangement results from the fact that the pulling loop at one end around a driven by the electric motor Drive wheel and at the other end is guided around a drive wheel of the hydraulic pump and the electric motor and the Hydraulic pump are arranged at the ends of an elongated fastening rail receiving the support rail.

309851/0274

In another embodiment, the hydraulic element can consist of a piston-cylinder unit, in which one part with a door leaf and the other part with a
fixed part is connected.

According to a further feature of the invention, the electric motor is designed as a gear rotating field magnet with 100% duty cycle, which has its greatest torque at the
Speed 0 and the torque 0 at a limit speed. Such a motor does not need to be switched off when the door is closed, when the door is stationary
The output torque serves as a locking force, which can be specially adjusted via a potentiometer
can. Due to the load dependency, the speed of the door movement can easily be adjusted via the hydraulic control device by setting the corresponding throttles
adjusted.

In a preferred embodiment, the control device has four throttle points, one of which
A pair of the opening movement and a pair of the closing movement of the door leaves are assigned. In the pairs, a speed throttle is used to set a normal opening or closing speed and
a damping throttle point of a damping movement. The throttle

309851/0274

22289H

can be easily adjusted from the outside so that the speeds can be adjusted individually.

The circuit of the SiQiervorrichtung can be particularly simple be kept with little effort if the damping throttle Downstream of the speed throttle point, viewed in the direction of flow, and via the shut-off valve can be short-circuited, which is advantageously designed as a solenoid valve. The hydro element then sucks on his Movement in one direction from a reservoir via a check valve and pushes the liquid Via the speed throttle point and the check valve or the two throttle points of one pair to the reservoir return. When it moves in the other direction, it sucks from the storage container via a second one Non-return valve on and the liquid is passed through the Speed throttle point and the economy valve or the two throttle points of the other pair to the reservoir pushed back. It is particularly useful if the solenoid valve is a shut-off valve * for both throttle pairs. In order to when switching over the solenoid valve, a sudden change in speed is avoided, the suction and pressure side of the hydraulic element connected by two lines, in which in opposite directions acting, adjustable pressure relief valves' are arranged to compensate for pressure surges.

309851/0274

22289H

In a very preferred manner are as actuators Limit switches are provided which can be actuated via the moving door leaves. The circuit is like this taken that a limit switch at the end of the opening movement the electric motor via a relay and a switching element switches off and a second relay over a second switching element the circuit for the now Electric motor running in the other direction of rotation closes after a third relay with a potentiometer adjustable drop-out delay has responded. Then two more limit switches are provided for Initiation of the damping shortly before the closed or open position of the door leaves the short-circuiting of the damping throttle point cancel via the solenoid valve. The times of actuation of the actuators, in addition to limit switches can also consist of cams can easily be adjusted in that the actuators ■ Are arranged in a position-adjustable manner. In particular, the limit switches can be displaced and locked on the support rail be provided on a support slide running in the support rail and carrying the door leaf then an actuating cam is provided for the limit switch.

In another embodiment, the locking |

valve does not consist of one solenoid valve but of two

309851/0274

22289H

Switching throttles «parallel to the damping throttle points lie. These switching throttles are activated by a cam shortly before the door leaf is in the closed or open position closed to initiate damping.

According to a further feature of the invention, additional actuating members are arranged which have a partial opening Determine within the maximum opening width of the door leaves. E.g. in winter it is desirable that the opening width is reduced. The circuit is made so that the effectiveness of these actuators through the switching position of a program switch can be influenced from the outside. Depending on the hydraulic circuit used, there are two additional ones for partial opening Limit switches as actuators to initiate the damping and stop of the electric motor or a solenoid valve is provided which short-circuits the switching throttle in the branch of the door opening via a limit switch. In the latter case, an additional opening is required for partial opening Arranged on the throttle acting cam.

So that in the event of a power failure, e.g. in the event of a disaster, the door opens automatically, is provided according to a further feature of the invention that on the pulling loop

309851/0274

22289U

a spring element engages, which via the electric motor is tensionable. In a particularly advantageous manner, the drive unit has a double-shaft output, and the spring element consists of a torsion spring, one end of which is connected to the fastening rail Housing is supported and the other end is connected to one shaft, while the other shaft carries the drive wheel for the pulling loop. When the door is closed, the spring is tensioned, the locking force of the motor is set so large that the spring force cannot take effect. In the event of a power failure The spring then leads the door leaves into the open position.

With such sliding doors, care must be taken that people or objects are not trapped in this way could injure themselves or damage the objects. In a particularly favorable embodiment supplies a switch that is periodically actuated depending on the door closing speed Pulses to a timer that stops the closing movement or reverses it into an opening movement as soon as the the time interval between the switching pulses is greater than a predetermined value entered into the timer. Such a safety control is used here with the proviso that the switching pulses over a certain

309851/0274

22289H

contactless switch from a disc rotating according to the closing speed be delivered. In an advantageous manner, the disc, which carries switching points on the circumference, is from the pulling loop driven .. Iron pins are provided as switching points, the non-contact switch is an inductive scanner educated.

The problem of locking the door is solved according to a further feature of the invention in that a polarized envelope magnet is provided, which triggers a pulse for the movement in each direction requirement. The armature of the magnet in its end position can be in particular by permanent disks be recorded in the event of a power failure.

With the arrangement, not only one becomes diverse Adjustment option for all desired functions and one easy adaptation to all opening widths achieved with practically the same components, but it arises also a simple manufacture and assembly in that the mounting rail with the electric motor and the Hydro element, the control device, the support carriage, the pulling loop, which is expediently designed as a toothed belt is, the actuators and an electrical

309851/0274

Control box form a ready-to-install, compact unit.

Further details of the invention are based on the drawing, which shows, for example, embodiments, explained in more detail. .-Show it :

a view of a sliding door assembly from the side,

a view from below without door leaves,

a side view

a section through a detailed arrangement IV-IV in Fig. 2 on a larger scale,

a cross section for this according to the line V-V in Fig. 4,

a side view of the locking device,

a section for this according to the line VII-VII in Fig. 6,

a section along the line VIII-VIII in Fig. 1 on a larger scale without Representation of the hydro element,

9 shows the circuit diagram of the hydraulic control block in a first embodiment,

10 shows a schematic representation of the electrical circuit diagram,

Fig. 1 Fig. 2 Fig. 3 Fig. 4th Fig. 5 Fig. 6th Fig. 7th Fig. 8th

309851/0274

Figu. .1 circuit arrangements in detail, to "those in the circuit diagram in FIG

are to be inserted,

Fic, a view of an arrangement of the

Sliding door from below with a second embodiment of the actuators for the control device,

Fig.. . a view from the front,

Fig. A view of this from the side,

Fig. A view of an arrangement ent

speaking of the figures 1 and in a third embodiment,

Fig. A section on this according to the line

XVIII-XVIII in Fig. 17,

Fig.. a circuit diagram of a hydraulic

Control block in a second off ·? leadership style,

Figurer. 20 and further detailed circuits that can be used in the circuit diagram according to FIG

are.

At a :. Cross-section of an approximately L-shaped fastening rail, a support rail 2 is attached, in which the support slide 3.4 run: on which door leaves 5.6 are attached. The door leaves .. , 6 are in a manner not shown, once with de :: -, upper drum and once with the lower drum

30985170274

22289U

a pulling loop 7, which is expediently designed as a toothed belt, connected so that the endless Pull loop 7 of the door leaf 5 in the representation of FIG. 1 to the left and the door leaf 6 to the right rises. The pulling loop 7 is guided once around a drive wheel 8 and once around a drive wheel 9, which is attached to the Ends of the fastening rail 1 are arranged. In this case, the drive wheel 8 is via a shaft 10 and a transmission driven by an electric motor 12, while the drive wheel 9 is a hydraulic element 1'3, in the case of the embodiments according to FIGS. 1, 2, 14 and 15 show a hydraulic pump 14

drives. The hydraulic element 13 drives a flow of fluid through a hydraulic control device 15, the circuit arrangement of which can be seen in detail from FIGS. 9 and 19. Actuators 16 intervene in the circuit arrangement in a manner to be described in more detail, the electrical Control for this is housed in a switch box 17, which is also attached to the mounting rail 1 as all other elements are attached, so that a compact, ready-to-install unit is given.

The electric motor is designed as a gear rotating field magnet, it drives the pulling loop via the drive wheel 8 and thus moves the door leaves 5,6 .. When closing

309851/0274

move these door leaves towards each other and they are finally pressed against each other on the front side. The locking force is therefore exercised by the electric motor 12, which has 100% duty cycle, that is, it is not switched off. This emits the greatest torque at speed 0, which can be set using a potentiometer 18. So that Door leaves 5, 6 are automatically opened in the event of a power failure, the electric motor 12 drives a second shaft 19, which takes one end 20 of a torsion spring 21 with it. The other end 22 of the torsion spring 21 is fixed in a housing 23, which in turn is attached to the fastening rail 1 again. When the door is closed, the Spring 23 is tensioned by the electric motor 12, if the power fails, the stored spring force creates the pulling loop Moved over the shafts 19, 10 or the gear 11, so that the door leaves open 5,6. The engine can be at another Embodiment can also be switched off in the closed position, if, for example, a special locking force is dispensed with. It is then designed more simply, it is an opening spring not provided in this case.

In the closed position, the door leaves can lock 5,6. be animalized. For this purpose (Figures 6 and 7) on the mounting rail 1 a polarized envelope magnet 24 is attached, which with its armature 25 in a trap 26 e.g. can engage on the support carriage 3. The anchor 25 remains

309851/0274

22289H

by permanent magnets not shown in each case in its end position, so that even in the event of a power failure a Unlocking does not take place. For the movement of the armature 25 in each direction, a special impulse be delivered. If the power fails, the armature 25 can easily be withdrawn using a hand lever 27 so that the door can be opened.

To avoid trapping, a safety circuit based on a specific pulse method is provided based. As can be seen from FIG. 8, the axis of the hydraulic pump 14 is on an axis 28 can, a disk 29 is mounted, which is driven via the pulling loop 7. In the range of its size it carries Switching points in the form of iron pins 30, which are opposite a switch 31 in the form of an inductive scanner, which is held on the fastening rail 1 via a carrier 33. The electrical circuit part is explained below.

The hydraulic control device consists of at least four throttle points 34 to 37, one in pairs Speed throttle 34 and a damping throttle 36 or 35 and 37 belong together. The suction side and the pressure side of the hydraulic element 13 are

309851/0274

gen 38,39 connected to each other, wherein in the line 38 a in one direction blocking overpressure valve 40 and in the line 39 a blocking in the other direction Pressure relief valve 41 is installed. Both pressure relief valves are adjustable. The speed throttles 34,35 downstream damping throttle points 36,37 are Can be short-circuited via a shut-off valve 42 which, in the embodiment according to FIG. 9, is designed as a solenoid valve.

If the electric motor 12 is switched on, e.g. when the door is in the closed position, the pulling loop 7 moves the door leaves 5, 6 and, in the case of the version with a hydraulic pump 14 as a hydraulic element 13, this via the drive wheel 9. This rotates in the predetermined direction and thereby sucks from a storage container 44 and e.g. via the check valve 45 and presses the flow of liquid via the speed restriction 35 and in the illustration drawn back into the storage container 44 via the shut-off valve 42. Just before the open position the solenoid valve is reversed, so that now the flow of liquid over the previously short-circuited Damping throttle 37 must flow. Through the throttling points 35,37 the resistance is changed, which the hydraulic pump is driven by the pulling loop 7 and thus the electric motor 12 opposed. Through the hydraulics, the door speed is set directly via the pulling loop 7,

309851/0274

or the speed of the electric motor 12 is influenced. The throttling points are in accordance with the desired speed profile set. If the door is fully open, it remains in this open position accordingly a certain electrical control a predetermined time, then the direction of rotation of the Electric motor reversed, so that the door leaves 5,6 perform a closing movement. This also rotates The direction of rotation of the hydraulic pump 14, which now sucks in from the reservoir 44 via the check valve 46, is reversed and presses the liquid flow back into the reservoir 44 via the throttle points 34 and the solenoid valve, unless the shut-off valve 4 2 is reversed in the vapor phase and the liquid flow is additionally via the damping throttle point 36 is passed. Thus, when the shut-off valve 42 is switched over, there is a change in speed does not occur too suddenly, the pressure relief valves 40 and 41 are provided with a smoothing effect.

The electrical control of the arrangement described so far is from the circuit according to the figures 10 to 13 can be found.

In Fig. 10 is the power supply to control circuits 47,48,49 reproduced via a transformer 50 with a corresponding low voltage, the electric motor 12 or

309851/0274

22289H

the star-connected rotating field magnet receives voltage via switching elements 51 or 5.2, whereby in the circuit of the switching element 52, the potentiometer 18 is placed so that the torque to be output by the motor is influenced can be. This circle belongs to the direction of rotation of the motor, which via the pulling loop 7, the door leaves 5,6 moved in the closing direction. In the closed position, the motor set via potentiometer 18 is then set by the motor Holding force exerted via a main switch 53 can the whole system can be switched off.

In the control circuit 48, in addition to a number of relays 54 to 59, capacitors 60,61 and limit switches 62 to 65 are arranged.

The control circuit 49 (Fig. 12) contains, among other things, in addition to a limit switch 66, relays 68,69 and switches 70 to 73, whereby the switches 70 and 71 can be actuated by a contact mat, light barrier or the like, and the door is opened set in motion. The switch 72 is opened if, for example, the door can no longer be opened from the outside when the shop closes should be able to, so the switch 71 should no longer have any influence on the opening of the door. The switch 73 holds the door in the corresponding position permanently in the open position. The circuit with the relay 69 is shown schematically the switch 31 designed as an inductive button is connected.

309851/0274

The control circuit 47 (Fig. 13) contains, among other things, in addition to the limit switch 67, the shut-off valve 42 for changing the Door speed, relay 74.75 for the safety circuit with the inductive switch 31 and the polarized ones Envelope magnet 24 with a switch 76 and a relay 77 for the locking device 78.

By actuating one of the switches 70, 71 in the control circuit 49 picks up relay 68, contacts 79 and 80 in control circuit 48 close. The contact 79 causes that the relay 54 picks up and is held by a self-holding contact. This also closes a contact 81, so that the relay 56 can pick up. The switching element 51 now also closes under the influence of the relay 54 and the electric motor 12 starts up. The door leaves 5,6 open. The opening speed depends on the setting of the speed throttle 35. When an actuating cam 82 reaches the Carrying slide 3 the limit switch 64, the relay picks up and causes the shut-off valve 42 to be blocked, so that the liquid flow is guided to the reservoir 44 via the damping throttle point. It turns out a creeping speed, which is dependent on the setting of the damping throttle point 37. Finally, the limit switch 62 is reached, the current flow through the relay 54 is interrupted, the relay drops out.

309851/0274

22289H

The electric motor 12 thus no longer receives any current, since the switching element 51 has also opened and the door stops. It will also open a contact 83, the check valve 42 is _in. The 9 line position in Fig reset. A contact 84 now separates the capacitor 61 from the voltage supply. The dropped contact 81 sets the drop-out delay, which can be set via a potentiometer 85, in operation. After the set time has elapsed, the relay 56 drops out, a contact 86 closes and the relay 57 picks up. The switching element 52 thus closes, so that the electric motor 12 starts up in the opposite direction and the door leaves 5, 6 begin to close. The closing speed depends on the setting of the speed throttle 34. As soon as the limit switch 67 is reached, the shut-off valve is adjusted again, so that now the liquid flow must go through the damping throttle 36 and the door leaves 5,6 finally reach their closed position in the crawl gear the door leaves 5, 6 are held with the locking force of the motor 12.

In winter in particular, it is desirable to be able to reduce the door opening width in a simple manner. There are therefore the limit switches 63 and 65 are arranged that easily

309851/0274

22289H

can be moved and locked so that they can be activated at the desired point. These fulfill the same function as the limit switches 62 and 64. These limit switches 63 and 65 are then effective when contact 87 is opened and contact 88 is closed via a program switch.

The safety circuit (Fig. 13) works in the way that the switch 31 (Fig. 12) periodically connects one "pole of the voltage source to a timing circuit 93, via a make contact 89 of a relay 69 (FIG. 12). The timer circuit 93 includes a relay 69 belonging contact 89, a diode 91, relays 74 and 75, a capacitor 92 and one belonging to the relay 74 Contact 90. Due to the parallel connection of the capacitor 92 to the relay 75, the latter speaks something earlier than relay 74. In this way, each time switch 31 closes, capacitor 92 is closed briefly charged. As soon as the relay 74 responds, the supply for the relay 75 is interrupted, it is however, because of the electrical energy stored in the capacitor 92, it is attracted for a certain time held. This time is chosen so that when the normal closing movement corresponding cycle of closing and opening the switch 31, the relay 75 is constantly attracted

309851/0274

22289H

remain. Only if the time intervals between two closings of the switch 31 have a certain value exceeds, so if a person or an object prevents the entry of the door leaves 5,6, that is enough Energy stored in capacitor 92 is no longer available to relay 75 until the switch is next closed 31 to keep dressed. The relay 75 thus drops out, with the result that the door closes immediately terminated and the reversal is initiated in an opening movement. The relay 74 causes the separation of the Relay 75 independent of the switching position of contact 89, i.e. it does not matter whether the disc 29 (Fig. 1) is then stopped when the iron pins 30 affect the switch 31 or not. By separating the Relay 75 it is possible that the timer can come into operation when the doors are stopped.

In another embodiment, the hydraulic control block is modified in that no solenoid valve but switching throttles 94, 95 are provided as the shut-off valve (FIG. 19). The hydraulic element 13 is shown here as a piston-cylinder unit 96. The damping throttle point 37 can be short-circuited by a solenoid valve 97. As can be seen from the. 17 shows that the cylinder 98 is fixedly arranged on the fastening rail 1,

309851/0274

22289U

while the piston 99 is connected to a boom 100 of the support carriage 4. The movement of the door leaves 5, 6 corresponds to the movement of the piston 99. When the door is opened, liquid is sucked in from the reservoir 44 via the check valve 45 or liquid is pressed out of the cylinder 9 8 via the piston 99, which passes through the speed throttle point 35 and the switching throttle 94 goes. The passage of the switching throttles 94, 95 is now dependent on the respective position of the door leaves, because cams 101 to 103, for example, are connected to the support carriage 4 and act on the switching throttles 94, 95 via roller levers and 105. If the door leaves 5, 6 come into one of their end positions, the switching throttle 94 or is throttled or closed via the cams 101 or 103, so that the liquid flow must pass through the damping throttle points 37 and 36, respectively. The corresponding damping is used. Spot, as shown in Figure 19 37 - of that • solenoid valve 97 has a short-circuiting of the damping throttle "for the" winter mode ", that is for a partial opening of the door, provided cam 102 is thereby turned off when the maximum door opening is to be achieved. , performs. the on Dämpfbewegung not drive the cam 102 can thus for

309851/0274

Impact come. The processes involved in the closing movement the door leaves 5,6 are reciprocal and correspond to those in the control according to FIG. 9 have been described.

The design according to FIGS. 14 and 15 differs from that according to FIG. 17 only in that that in the first case the hydraulic pump 14 as the hydraulic element 13 and in the other case the piston-cylinder unit 96 is provided. The limit switch 62 is again used to switch off the motor 12 in the open position, the limit switch 66 switches off the safety circuit when the door is closed, the limit switch switches the solenoid valve 97 when the program switch is in the appropriate position Screws 106 to 109 can still be seen in the hydraulic control device 15, via which the throttle points can be easily seen from the outside 34 to 37 can be set.

In the embodiment with the through the cams to 103 controlled switching throttles 94 and 95 and the application of the solenoid valve 97 is the control circuit instead of as indicated in FIG. 13 according to FIG. 20. The control circuit 48 differs according to 21 of that for the arrangement with the check valve

309851/0274

as a solenoid valve (Fig. 11) in that the relay 59 and the limit switches 64 and 65 with the switch 88 in omission come.

309851/0274

Claims (33)

-25- 22289H claims 1.! Sliding door with movable back and forth on a support rail Door leaves that can be driven by an electric motor and their movement by a hydraulic one Control device is controllable, characterized / that the electric motor (12) via a Pull loop (7) is connected to a hydraulic element (13) and the hydraulic control device (15) at least has two adjustable throttle points (34,36; 35,37) connected in series, which control the displacement influence the flow of liquid in the hydraulic element (13) and one of the throttle points (36; 37) a shut-off valve (42) controllable via actuators (16) is connected in parallel with which this can be bridged depending on the door movement. 2. Sliding door according to claim 1, characterized in that the hydraulic element (13) consists of a hydraulic pump (14) . 3. Sliding door according to claim 1 and 2, characterized in that the pulling loop (7) on one. The end of a drive wheel (8) driven by the electric motor (12) and ■ 309851/0274 22289H at the other end around a drive wheel (9) of the hydraulic pump (14) and the electric motor (12) and the Hydraulic pump (14) at the ends of an elongated fastening rail that receives the support rail (2) (1) are arranged. G 4. Sliding door according to claim 1, characterized in that that the hydraulic element (13) consists of a piston-cylinder unit (96), in which a part (e.g. the Piston 99) with a door leaf (5 or 6) and the other part (e.g. the cylinder 98) with a fixed part (e.g. the fastening rail 1) is connected. 5. Sliding door according to claim 1 to 4, characterized in that the electric motor (12) as a gear rotating field magnet is designed with 100% duty cycle, which has its greatest torque at speed 0 and the torque outputs 0 at a certain limit speed. 6. Sliding door according to claim 5, characterized in that the maximum output torque from the electric motor (12) is adjustable by a potentiometer (18). 309851/0274 ■ 22289U 7. Sliding door according to claim 1, characterized in that that the control device (15) has four throttle points * (34 to 37), of which a pair (35,37) of Opening movement and a pair (34,36) of the closing movement of the door leaves (5,6) are assigned and at the pairs each have a speed throttle (34 or 35) setting a normal opening or. Closing speed and a damping throttle point (36 or 37) is used for a damping movement. 8. Sliding door according to claim 7, characterized in that the damping throttle point (36, -37) in the flow direction viewed downstream of the speed throttle point (34; 35) and can be short-circuited via the shut-off valve (42). 9. Sliding door according to claim 8, characterized in that the check valve (42) is designed as a solenoid valve is. 10. Sliding door according to claim 1, 7 and 8, characterized in that that the hydraulic element (13) in its movement in one direction from a storage container (44) is sucked in via a check valve (45) and the liquid is drawn in via the speed throttle (35) 309851/0274 and the shut-off valve (42} or the two throttle points (35,37) of one pair pushes back towards the storage container (44) and, when it moves in the other direction, out of the storage container (44) via one
second non-return valve (46) sucks in and presses the liquid back to the reservoir (44) via the speed throttle point (34) and the shut-off valve (42) or the two throttle points (34,36) of the other pair. 11. Sliding door according to claim 9 and 10, characterized in that that the solenoid valve is a check valve (42) for both pairs of throttle points (34,36; 35,37). 12. Sliding door according to claim 7 to 11, characterized in that that the suction and pressure side of the hydraulic element (13) are connected to one another by two lines (38,39), in which overpressure valves (40,41) acting in opposite directions are arranged
are. 13. Sliding door according to claim 1, characterized in that the actuating members (16) limit switches (62 to 67) are provided, which over the moving
Door leaves (5,6) can be actuated. 309851/0274 14. Sliding door according to claim 13 / characterized in that that a limit switch (62) at the end of the opening movement controls the electric motor (12) via a relay (54) or a switching element (51) switches off and a second relay (57) via a second switching element (52) Circuit for the electric motor (12) now running in the other direction of rotation closes after a the third relay (56) has responded with a drop-out delay adjustable via a potentiometer (85). 15. Sliding door according to claim 9 and 13, characterized in that two limit switches (64,67) are provided are that to initiate the damping shortly before the open or closed position of the door leaves (5,6) the Course closing of the damping throttles (37,36) over cancel the shut-off valve (42). 16. Sliding door according to claim 1, characterized in that the actuating members (16) are arranged to be locally adjustable. 17. Sliding door according to claim 3, 13 and 16, characterized in that at least the limit switches (63,65) on the fastening rail (1) are arranged displaceably and lockable and on one in the carrier 309851/0274 Rail (2) running support carriage (3), which carries the door leaf (5), an actuator (82) for the limit switch (62 to 67) is provided. 18. Sliding door according to claim 1, characterized in that that cams (101 to 103) are provided as actuating elements (16), which on switching throttles (94.95) act. 19. Sliding door according to claim 7, characterized in that two switching throttles (94.95) are used as the shut-off valve (42) are provided. 20. Sliding door according to claim 18 and 19, characterized in that the cams (101 to 103) for Initiation of the damping shortly before the closed or open position of the door leaves (5,6) parallel to Close the switching throttles (94.95) located near the damping throttle points (36,37). 309851/0274 21. Sliding door according to claim 1, characterized in that that actuators (16) are arranged which have a partial opening within the maximum opening width the door leaf (5,6) and determine the effectiveness of these actuators (16) by the Switch position of a program switch can be influenced. · 22. Sliding door according to claim 19 to 21, characterized in that the switching throttle (94) in the branch of Door opening can be short-circuited by a solenoid valve (97) via a limit switch (65). 23. Sliding door according to claim 21, characterized / that two additional limit switches for the partial opening (63,65) as actuators (16) to initiate damping and stop of the electric motor (12) are provided. 24. Sliding door according to claim 21, characterized in that for the partial opening an additional, on the switching throttle (94) acting cam (102) is arranged. 309851/0274 22289H 25. Sliding door according to claim 1, characterized in that a spring element engages the pulling loop (7), which can be tensioned via the electric motor (12). 26. Sliding door according to claim 25, characterized in that the electric motor (12) has a double-shaft output and the spring element consists of a torsion spring (21), one end (22) of which is in one with the Mounting rail (1) connected housing (23) is supported and the other end (20) with the one Shaft (19) is connected, while the other shaft (10) carries the drive wheel (8) for the pulling loop (7). 27. Sliding door according to claim 1 with a security . control in which a depending on the door closing speed periodically actuated switch supplies pulses to a timer, which stops the closing movement or starts an opening movement reverses, as soon as the time interval between the switching pulses is greater than a predetermined one, into the timing circuit entered value, characterized in that the switching impulses via a contactless working Switch (31) from one according to the 309851/0274 22289H Closing speed rotating disc (29) are released, which carries switching points on the circumference. 28. Sliding door according to claim 1, 2 and 27, characterized in that that the disc (29) is driven by the pulling loop (7), iron pins (30) as switching points carries and the contactless switch (31) is designed as an inductive scanner. 29. Sliding door according to claim 1, characterized in that that a locking device (78) is provided which has a polarized envelope magnet (24), which requires an impulse release for the movement in each direction and the additional one can be actuated via a hand lever (27). 30. Sliding door according to claim 29, characterized in that that the armature (25) of the magnet (24) is held in its end positions by permanent disks. 31. Sliding door according to claim 1, characterized in that that the pulling loop (7) is designed as a toothed belt. . 309851/0274 22289U 32. Sliding door according to claim 3, characterized in that the fastening rail (1) in cross section is at least almost L-shaped. 33. Sliding door according to claim 1, one door leaf fixed to the one running in one direction and the other door leaf firmly to the drum of the pulling loop running in the other direction via the support carriage are connected, characterized in that the fastening rail (1) with the electric motor (12) and the hydro element (13), the control device (15) / the support carriage (3, 4), the pulling loop (7), the actuators (16) and an electrical switch box (17) a ready-to-install, form a compact unit. 309851/027 * Blank page