EP0163861B1 - Door actuating device - Google Patents

Door actuating device Download PDF

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Publication number
EP0163861B1
EP0163861B1 EP85104405A EP85104405A EP0163861B1 EP 0163861 B1 EP0163861 B1 EP 0163861B1 EP 85104405 A EP85104405 A EP 85104405A EP 85104405 A EP85104405 A EP 85104405A EP 0163861 B1 EP0163861 B1 EP 0163861B1
Authority
EP
European Patent Office
Prior art keywords
door
valve
way
piston
emergency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP85104405A
Other languages
German (de)
French (fr)
Other versions
EP0163861A2 (en
EP0163861A3 (en
Inventor
Dietmar Meyer
Alfred Ernst
Günter Sebesta
Wolfgang Gudat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wabco Westinghouse Fahrzeugbremsen GmbH
Original Assignee
Wabco Westinghouse Fahrzeugbremsen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wabco Westinghouse Fahrzeugbremsen GmbH filed Critical Wabco Westinghouse Fahrzeugbremsen GmbH
Publication of EP0163861A2 publication Critical patent/EP0163861A2/en
Publication of EP0163861A3 publication Critical patent/EP0163861A3/en
Application granted granted Critical
Publication of EP0163861B1 publication Critical patent/EP0163861B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05FDEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00Power-operated mechanisms for wings
    • E05F15/50Power-operated mechanisms for wings using fluid-pressure actuators
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05FDEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00Power-operated mechanisms for wings
    • E05F15/40Safety devices, e.g. detection of obstructions or end positions
    • E05F15/49Safety devices, e.g. detection of obstructions or end positions specially adapted for mechanisms operated by fluid pressure, e.g. detection by monitoring transmitted fluid pressure
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00Application of doors, windows, wings or fittings thereof
    • E05Y2900/50Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/506Application of doors, windows, wings or fittings thereof for vehicles for buses
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00Application of doors, windows, wings or fittings thereof
    • E05Y2900/50Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53Type of wing
    • E05Y2900/531Doors

Definitions

  • the invention relates to a door actuation system, in particular for doors in vehicles for the transportation of people, with a pressure-actuated door drive according to the preamble of patent claim 1.
  • Door actuation systems in particular for doors in vehicles for the transportation of people, can have at least one first emergency shutdown device for safety reasons.
  • the first emergency shutdown device prevents people or things that are caught by the door when it is moved from being injured or damaged.
  • a second emergency shutdown device can also be provided.
  • the second emergency shutdown device enables the door actuation system to be stopped immediately by relieving the pressure on the door drive and interrupting the pressure medium supply, regardless of the first in any operating state via an emergency valve.
  • a door operating system of the type mentioned is known from DE-A-3225536.
  • a valve device controlling the pressurization of the active surfaces of the actuating piston is controlled such that both active surfaces of the actuating piston are relieved of pressure.
  • the valve device is preceded by a check valve designed as an AND gate.
  • the check valve is designed in such a way that, when pressure is applied to two control connections, it regulates a pressure. This modulated pressure is passed on to the valve device.
  • the shut-off valve is pressurized at both control connections.
  • the check valve then acts on the valve device in such a way that it is set such that both active surfaces of the actuating piston are relieved of pressure.
  • This door actuation system offers the advantage that it enables monitoring of both directions of movement of the door without additional expenditure on components of the first emergency shutdown device.
  • the check valve is required to achieve the above-mentioned safety function in this prior art.
  • This device and thus also the door actuation system itself is complicated, prone to failure and expensive.
  • the first emergency shutdown device has a combination of a minimum pressure switch (there 34 ') and a shut-off valve (there 31'), which, when the pressure falls below a minimum (as a measure of a predetermined door resistance), on the active surface of the actuating piston which determines the door movement (there 11 ') cancels the separation of the pressure medium supply lines (there 15', 16 ').
  • the first emergency shutdown device only works with respect to one direction of door movement. To monitor the other direction of door movement, a second complete first emergency shutdown device with a minimum pressure switch and shut-off valve is required, and therefore considerable effort.
  • a second emergency shutdown device (there 17 ', 21') with an emergency valve (there 21 ') is provided
  • braking or damping of the door movement upon its re-actuation is only possible when the first emergency shutdown device is present and also only in the latter monitored door movement direction possible.
  • Braking or damping the door movement in the other door movement direction when the emergency valve is actuated again requires additional measures, such as the throttle valve (there 20') or a second, complete, first emergency shutdown device.
  • a braked or damped door movement if only the second emergency shutdown device (there 17 ', 21') with the emergency valve (there 21 ') is provided, in any case requires additional devices, such as the throttle valve (there 20').
  • the invention has for its object to improve a door control system of the type mentioned while preserving its advantages with simple means so that it provides the safety function mentioned without complicated, fault-prone and complex devices.
  • the invention is based on the idea of preventing an excess of force on the actuating piston, which can lead to injury or damage to objects detected in the door movement, which should also be understood to mean persons, by the simultaneous pressurization of both active surfaces of the actuating piston.
  • the invention enables the simple design of a second emergency shutdown device, if provided, with an emergency valve.
  • a changeover valve provided in the prior art for the second emergency switching device and connected in series as an OR element to the check valve can be omitted.
  • this shuttle valve enables the valve device to be acted upon by the check valve and via its first flow path second flow path, the action on the part of the emergency valve.
  • the invention enables an emergency shutdown by both emergency shutdown devices by means of the same emergency valve device and thus also an arrangement of the second emergency shutdown device as the sole emergency shutdown device.
  • the invention also ensures that sudden or too rapid movements of the door when restarting after actuation of the second emergency shutdown device are avoided, so that for this purpose in State-of-the-art switchable, complex throttle valve becomes superfluous.
  • the above-mentioned first emergency shutdown device can monitor the door resistance in the opening direction (opening resistance) and / or in the closing direction (closing resistance).
  • the first emergency shutdown device monitors the opening resistance of the door, while its closing resistance is monitored by a monitoring device controlling a reversing device.
  • the valve device can advantageously consist of a first and a second 3/2-way valve, each of which is assigned to an active surface of the actuating piston, and the emergency valve device can consist of a third 3/2-way valve.
  • the door actuation system according to the invention can also be combined with an operating switch device, the actuation surfaces of the door actuation piston being alternately pressurized and depressurized when actuated.
  • a combination of the door actuation system according to the invention with an operating switching device can advantageously be achieved in that the first and the second 3/2-way valve each have a second actuating device, which is actuated essentially by the operating switching device, and an actuating device, which ensures the security functions mentioned above, are provided.
  • the second actuating devices of the first and the second 3/2-way valve can be mechanically operatively connected such that when the one 3/2-way valve is switched from its first switching position to its second switching position, the other 3/2-way valve is simultaneously in opposite direction.
  • the invention is designed with electrical or electronic control and electro-pneumatic adjustment of the valve device.
  • the second actuating devices of the first and second 3/2-way valve and the actuating device of the third 3/2-way valve can be actuated by hand.
  • the closing resistance could be monitored visually by the operating personnel, which would make a control device unnecessary.
  • a mechanical control with / or without a control device with mechanical logic modules would also be feasible.
  • a pure pressure medium control would also be possible with a control device composed of pressure medium logic modules, in particular pneumatic ones.
  • Combinations of the control types mentioned and those of the control types mentioned with electrical or electronic components can also be carried out.
  • the control device of a preferred embodiment contains an automatic emergency shutdown and a reversing device. However, these can also be arranged separately, each individually or in summary.
  • the manually operated emergency valve in a preferred embodiment can be pressure medium or electrical, e.g. be actuated via an actuating magnet.
  • the door drive can be operated with an axially displaceable actuating piston, but also with other servomotors, e.g. with a rotary piston.
  • the invention has the effect that, when the first emergency shutdown device is actuated, the counter surface of the door drive is also pressurized in addition to the active surface just acted upon. As a result, a counterforce to the actuating force is built up on the counter surface, which causes the required security effect, namely the injury or damage to persons or objects detected during the door movement.
  • the opening area and the closing area can be designed in relation to one another in such a way that the resulting force is so low that the door comes to a standstill as a result of friction on the door seals and in the transmission mechanism, or can still slowly open or close in its end position .
  • the invention causes the opening and closing surfaces of the door drive to be pressurized at the same time and, as described above, to come to a standstill or slow door movement in this case as well.
  • the invention also enables designs with compressed air or with hydraulic fluids as pressure medium.
  • FIG. 1 shows a pneumatic door actuation system with an actuation piston 22, which has an opening surface 21 and a closure surface 23, and forms a door drive with a transmission mechanism symbolized by a door locking column 24.
  • Continuous lines represent a compressed air line system.
  • the opening surface 21 is connected to the working connection of a first 3/2-way valve 10, the closing surface 23 is connected to the working connection of a second 3/2-way valve 26.
  • An emergency valve 3 designed as a 4/2-way valve is arranged between the supply connections of the 3/2-way valves 10 and 26 mentioned and a compressed air tank 1 serving as a pressure source.
  • the first and the second 3/2-way valve 10, 26 form a valve device 10, 26.
  • the first and the second 3/2-way valve 10 or 26 each have a second actuating device 8 or 25 and an actuating device 17 or 29. In addition, they are mechanically operatively connected via a coupling member 18.
  • the respective second actuating device 8 or 25 is designed as a pneumatic actuating device with a solenoid pilot valve.
  • the respective adjusting device 17 or 29 can be actuated pneumatically.
  • the first and the second 3/2-way valve 10 or 26 each have a first switching position 16 or 28 and a second switching position 11 or 27. In the first switching position 16 or 28 of the 3/2-way valves 10 or 26, the respectively assigned active surface 21 or 23 with the supply connection. Connection of the respective 3/2-way valve 10 or 26 connected.
  • the active surface 21 or 23 assigned to the respective 3/2-way valve 10 or 26 is vented. From the first 16 or 28 to the second switching position 11 or 27, each 3/2-way valve 10 or 26 can be changed over by the respective second actuating device 8 or 25. During this changeover, the 3/2-way valve 10 or 26, which is currently in its second switching position 11 or 27, is taken into its first switching position 16 or 28 via the coupling member 18.
  • the 3/2-way valves 10 or 26 are independent of the respective second actuating device 8 or 25 and without coupling to the other 3/2-way valve 10 or 26 from their second switching position 11 or 27 in their first switching position 16 or 28 adjustable.
  • the actuating devices 17 and 29 of the first and the second 3/2-way valve 10 and 26 are connected together with the outlet, hereinafter referred to as the working connection, of a third 3/2-way valve 5 designed as an emergency valve device.
  • the third 3/2-way valve 5 is e.g. biased by a spring into a basic position 31 and also has a changeover position 4 and an actuating device 6 designed as an actuating magnet 6, upon activation of which it is placed in the changeover position 4.
  • the working connection of the third 3/2-way valve 5 is connected to a second input 32 in said basic position 31 and to a first input 30 of the third 3/2-way valve 5 in said switching position 4.
  • the emergency valve 3 can be set manually into a normal switch position 34 and an emergency switch position 2. It has a first and a second working connection 33 and 35, a supply connection 36 connected to the compressed air tank 1 and a vent. In the normal switching position 34, the first working connection 33 is connected to the supply connection 36 and the second working connection 35 is connected to the vent. In the emergency switch position 2, the first working connection 33 is connected to the vent and the second working connection is connected to the supply connection 36.
  • the supply connections of the first and the second 3/2-way valve 10 and 26 and on the other hand the first input 30 of the third 3/2-way valve 5 are connected to the first working connection 33 of the emergency valve 3.
  • the second inlet 32 of the third 3/2-way valve 5 is connected to the second working connection 35 of the emergency valve 3.
  • Throttles 19 and 20 are arranged in compressed air lines between the working connections of the first and the second 3/2-way valve 10 or 26 and the respectively assigned active surface 21 or 23 of the actuating piston 22.
  • these chokes By means of these chokes, the adaptation of the characteristics of the door operating system to that of the door drive and the door, e.g. to the friction in the transmission mechanism and on the door seals. It is obvious that in individual cases only one choke has to be arranged in a line, or chokes are not required at all.
  • the present exemplary embodiment has an electrical or electronic evaluation and switching device 9 , hereinafter referred to as switching device 9, on.
  • switching device 9 forms an operating switching device and also contains an automatic emergency shutdown device for a first emergency shutdown device and a reversing device.
  • the automatic emergency shutdown together with a monitoring device 14 which monitors the opening resistance of the door, forms the first emergency shutdown device which, when the door detects an object in its opening movement, ie when the opening resistance reaches a predetermined value, violates or damages it by reducing the door opening force prevented.
  • object means both people and things.
  • the reversing device prevents damage or damage if the door detects objects in their closing movement.
  • the reversing device evaluates signals from a monitoring device 13 monitoring the closing resistance of the door in such a way that when a predetermined closing resistance is reached, the door drive is reversed from the closing movement into the opening movement.
  • the monitoring devices 13 and 14 are designed as differential pressure switches, which respond to a predetermined difference between the pressures acting on the closing surface 23 and the opening surface 21.
  • the monitoring devices 13 and 14 can also be designed as sensors which sense other parameters for the respective door resistance, for example the opening speed or the closing speed of the door.
  • the switching device 9 are also assigned limit switches 12 and 15, each of which is assigned to a door end position. These limit switches switch off the monitoring devices 13 and 14 when and as long as the door is in the respectively assigned end position. Without this limit switch, the switching device 9 in connection with the respective monitoring device 13 or 14 would react as if to an increased door resistance.
  • the dash-dotted lines represent electrical connections between the above-mentioned devices, insofar as they are electrical or electronic.
  • the emergency valve 3 In normal operation, as shown, the emergency valve 3 is in its normal switching position 34 and the third 3/2-way valve 5 in its basic position 31. As a result, the first and second 3/2-way valves 10 and 26 are pressurized at their supply connections and vented at their actuators 17 and 29.
  • the switch 7 is actuated arbitrarily, whereupon, via the switching device 9 and the respective second actuating device 8 or 25, the first or second 3/2-way valve 10 or 26 which is currently in its first switching position 16 or 28 is switched to its second switching position 11 or 27.
  • the switching device 9 determines the direction in which it had previously controlled the door and now controls it in the opposite direction of movement.
  • the door is in a closing movement. If the door detects an object, the closing resistance increases. At a predetermined value of the closing resistance, the switching device 9, in conjunction with its reversing device, gives a pulse to the magnet of the second actuating device 25 of the second 3/2-way valve 26 which, as a result, moves from its first switching position 28 into its position second switching position 27 is set and thereby takes the first 3/2-way valve 10 from its second switching position 11 into its first switching position 16 via the coupling member 18.
  • the closing surface 23 is vented and the opening surface 21 is pressurized, with the result that the door reverses (reverses) from its closing movement into its opening movement.
  • the switching device 9 gives a pulse as an emergency signal to the actuating magnet 6 of the third 3/2-way valve 5 in connection with its automatic emergency switch-off device on the basis of the signals emitted by the monitoring device 14 and connects the actuating device 17 or 29 of the first and the second 3/2-way valve 10 or 26 with its pressurized first inlet 30 with the result that the actuating devices 17 and 29 are also pressurized, whereby the second 3/2 -Way valve 26 is placed from its second switching position into its first switching position 28.
  • the closing surface 23 of the actuating piston 22 is also pressurized, as a result of which the opening movement of the door is braked or broken off or vice versa.
  • the magnitude of the excess force in the opening or closing direction can be determined via the ratio of the opening area 21 to the closing area 23 such that the door either continues slowly in the opening or closing direction or comes to a standstill as a result of the friction in the transmission mechanism and on the door seals. It is obvious that the behavior of the door can also be influenced by the design of the friction elements. As a result, the pinching force acting on the detected object is in any case reduced to zero or to a harmless level.
  • a second emergency shutdown device is started.
  • the supply connections of the first and the second 3/2-way valve 10 and 26 are independent of the current operating state of the door operating system the ventilation of the emergency valve 3 is vented.
  • the actuating devices 17 and 29 of the first and the second 3/2-way valve 10 or 26 are acted upon via the third 3/2-way valve 5, as a result of which the 3 / 2- Directional valves 10 and 26 is placed in its first switching position 16 and 28.
  • the active surface 21 or 23 of the actuating piston 22 assigned to the relevant 3/2-way valve 10 or 26 is also vented via the venting of the emergency valve 3.
  • both the opening surface 21 and the closing surface 23 of the actuating piston 22 are thus vented regardless of the previous operating state.
  • the first and the second 3/2-way valve 10 or 26 are in their first switching position 16 or 28, so both the closing surface 23 and the opening surface 21 of the actuating piston 22 are pressurized.
  • the control device 9 gives a pulse to the magnet of the second actuating device 8 of the first 3/2-way valve 10, which is thereby placed in its second switching position 11 and thereby connects the opening area 21 to the atmosphere.
  • the door drive is set in motion in the closing direction.
  • the pressure that is released from the opening surface 21 offers sufficient counterforce to allow this closing movement to take place with a brake.
  • the first 3/2-way valve 10 is in its first switching position 16 and the second 3/2-way valve 26 is in its second switching position 27; only the opening area 21 is therefore pressurized.
  • the switching device 9 in this case again gives a pulse to the magnet of the second actuating device 8 of the first 3/2-way valve 10. This is thereby placed in its second switching position 11 and takes the second one via the coupling member 18 3/2-way valve 26 in its first switching position 28 with.
  • the opening surface 21 is again connected to the atmosphere and the closing surface 23 is pressurized, with the result that a closing movement which is slowed down by the pressure on the opening surface 21 starts again.
  • Recommissioning after an emergency shutdown by the second emergency shutdown device is done by switching the emergency valve 3 from its emergency switch position 2 to its normal switch position 34 and then actuating the switch 7. Since in this case the first and the second 3/2-way valve 10 or 26 are in their first switching positions 16 and 28, when the emergency valve 3 is switched to its normal switching position 34, both the opening surface 21 and the closing surface 23 are pressurized, with the result that, depending on the friction and surface area on the actuating piston, the door is braked in the opening or closing direction runs or stops. If the switch 7 is now actuated, the mode of operation described above for the case of restarting after an emergency shutdown by the first emergency shutdown device takes place. The above functional description makes it clear that the emergency valve can also be provided as the only emergency shutdown device.
  • FIG. 2 shows a door valve for the door actuation system according to FIG. 1, in which the valve device 10, 26 and the emergency valve device 5 as well as the coupling member 18 are combined in one structural unit.
  • the door valve has a housing 51 with a supply connection 52, a vent 54, a first working connection 79 and a second working connection 66.
  • a bore with an approximately axially central region of enlarged diameter designed as a piston guide 77 and axial side regions of smaller diameter designed as piston shaft guides 59, 81.
  • Two axially opposed switching pistons 55, 80 and 57, 65 are guided with piston heads 55 and 57 in the piston guide 77 and with piston shafts 80 and 65 in the piston shaft guides 81 and 59 so that they are axially displaceably sealed.
  • a second actuating chamber 56 is enclosed between the mutually facing end faces of the piston heads 55, 57, while first actuating chambers are included between the rear sides of the piston heads 55 and 57 facing away from each other and a respectively assigned step surface at the transition from the piston guide 77 to the respective piston skirt guide 59 or 81 67 and 78 are included.
  • the piston shafts 65 and 80 each have a tapered area, which forms a connecting chamber 58 and 53 with the respectively assigned piston shaft guide 59 and 81, respectively.
  • Each switching piston 55, 80 or 57, 65 is displaceable into a first switching position, in which the rear of its piston head 55 or 57 rests on the associated step surface between piston guide 77 and piston skirt guide 81 or 59, and displaceable into a second switching position, in which abuts the end face of its piston head 55 or 57 on the end face of the piston head 55 or 57 of the other switching piston 55, 80 or 57, 65.
  • the supply connection 52 is located via a supply channel 60 inside or outside the housing 51 with the piston skirt guides 59 or 81 and in each case via an inlet seat 61 or 68 or 82, with three inlet chambers 64 or 76 or 83 in connection, of which the first inlet chamber 83 with the first actuating chamber 78 of the first switching piston 55, 80, the second Inlet chamber 64 are connected to the first actuating chamber 67 of the second switching piston 57, 65 and the third inlet chamber 76 to the second actuating chamber 56, each via a housing channel.
  • actuating magnets 62 and 70 and 50 are fastened to the housing 51 in a manner not shown in any more detail.
  • actuating magnet 70 applies correspondingly to the other actuating magnets 50 and 62, respectively.
  • the actuating magnet 70 has an actuator 71 which, when the magnet is not activated and symbolized by its winding 69, is biased against the inlet seat 68 by at least one spring 75.
  • the actuator 71 thus forms an inlet valve 68, 71 with the inlet seat 68.
  • the actuator 71 is formed on its end face facing away from the inlet seat 68 as a closing surface 72, which forms an outlet valve 72, 74 with an outlet seat 74 formed on the magnet housing.
  • the outlet valve 72, 74 is open when the magnet is not activated.
  • the interior of the magnet housing is designed as a continuation of the inlet chamber 76. This means that when the magnet is not activated, i.e.
  • the inlet chamber 76 When the outlet valve 72, 74 is open, the inlet chamber 76 is connected to a line connection 73.
  • the magnet is activated, i.e.
  • the outlet valve 72, 74 When the outlet valve 72, 74 is closed and the inlet valve 68, 71 is open, the inlet chamber 76 is connected on the one hand to the supply connection 52 and on the other hand via a housing channel to the second actuating chamber 56.
  • the actuating magnets 50 and 62 are identical in construction and function to the actuating magnet 70, the respectively assigned inlet chambers 83 and 64 having the respectively assigned first actuating chamber 78 and 67 when the magnet is activated and with ventilation openings 84 when the magnet is not activated or 63 are connected in the respective magnet housing.
  • the first working connection 79 is connected to the piston shaft guide 81 of the first switching piston 55, 80
  • the second working connection 66 is connected to the piston shaft guide 59 of the second switching piston 57, 65.
  • the vent connection 54 is connected via a corresponding channel system in or on the housing 51 to both piston skirt guides 80 and 59 and to chambers which are formed between the rear sides of the piston skirt 65 and 80 and the piston skirt guides 59 and 81.
  • FIG. 2 shows the first switching piston 55, 80 in its first switching position, indicated by I.
  • the first connection chamber 53 assumes a position in which it connects the supply connection 52 to the first working connection 79.
  • the second switching piston 57, 65 is shown in FIG. 2 in its second switching position, indicated by 11. In this second switching position, the second connecting chamber 58 is in such a position that it connects the second working connection 66 to the vent 54.
  • the first actuating chamber 78 of the first switching piston 55, 80 is pressurized.
  • the first switching piston 55, 80 is thereby placed to the right in its second switching position.
  • the first shading piston 55, 80 takes the second switching piston 57, 65 with it via the operative connection between the end faces of the piston heads 55 and 57, respectively.
  • the switching piston 55, 80 or 57, 65 which is currently in its second switching position, is placed in its first switching position over the end face of its piston head 55 or 57. Based on the illustration in FIG. 2, this means that the second switching piston 57, 65 is placed in its first switching position.
  • both switching pistons 55, 80 and 57, 65 are in their first switching position, that is to say both working connections 79 and 66 are connected to the supply connection 52.
  • the switching piston 55, 80 or 57, 65 which is currently in its second switching position, is placed in its first switching position even when the line connection 73 is pressurized.
  • a valve device and an emergency valve device in the sense of the invention in particular the first 10 and the second 26 and the third 3/2-way valve 5 of the exemplary embodiment according to FIG. Including their actuating devices 8 and 25 and respectively 6 or 17 or 29 and the coupling member 18 united.
  • its supply connection 52 is with the first working connection 33 of the emergency valve 3
  • its second working connection 66 with the closing surface 23 and the line connection 73 to be connected to the second working connection 35 of the emergency valve 3.
  • the first switching piston 55, 80 in connection with the actuating magnet 50 and the first actuating chamber 78 then correspond to the first 3/2-way valve 10 with its second actuating device 8, the second switching piston 57, 65 in conjunction with the actuating magnet 62 and the first actuating chamber 67 the second 3/2-way valve 26 with its second actuating device 25 and the operative connection between the end faces of the piston heads 55 and 57 the coupling member 18.
  • the actuating magnet 70 corresponds to the third 3/2-way valve 5 with its actuating device 6.
  • the actuating devices 17 and 29 of the 3/2-way valves 10 and 26 correspond to the second actuating chamber 56 in conjunction with the end faces of the piston heads 55 and 57 of the first and second switching pistons 55, 80 and 57, 65.
  • the door valve described represents a very advantageous combination of the first and the second 3/2-way valve, in which the third 3/2-way valve of the door actuation system according to FIG. 1 is integrated with little effort.
  • the door valve described is thus also a very advantageous summary of the valve device and emergency control device according to the invention.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Description

Die Erfindung betrifft eine Türbetätigungsanlage, insbesondere für Türen in Fahrzeugen zur Personenbeförderung, mit einem druckmittelbetätigten Türantrieb gemäss dem Oberbegriff des Patentanspruchs 1.The invention relates to a door actuation system, in particular for doors in vehicles for the transportation of people, with a pressure-actuated door drive according to the preamble of patent claim 1.

Türbetätigungsanlagen, insbesondere für Türen in Fahrzeugen zur Personenbeförderung, können aus Sicherheitsgründen wenigstens eine erste Notabschalteinrichtung aufweisen. Über die erste Notabschalteinrichtung wird verhindert, dass Personen bzw. Sachen, die bei Bewegung der Tür von dieser erfasst werden, verletzt bzw. beschädigt werden. Es kann auch eine zweite Notabschalteinrichtung vorgesehen sein. Die zweite Notabschalteinrichtung ermöglicht unabhängig von der ersten in jedem Betriebszustand über einen Nothahn eine sofortige Stillsetzung der Türbetätigungsanlage durch Druckentlastung des Türantriebs und Unterbrechung der Druckmittelzufuhr. Darüber hinaus kann es erforderlich sein, dass bei Wiederinbetriebnahme der Türbetätigungsanlage nach einer Betätigung einer Notabschalteinrichtung die Tür keine plötzlichen oder zu schnellen Bewegungen macht.Door actuation systems, in particular for doors in vehicles for the transportation of people, can have at least one first emergency shutdown device for safety reasons. The first emergency shutdown device prevents people or things that are caught by the door when it is moved from being injured or damaged. A second emergency shutdown device can also be provided. The second emergency shutdown device enables the door actuation system to be stopped immediately by relieving the pressure on the door drive and interrupting the pressure medium supply, regardless of the first in any operating state via an emergency valve. In addition, it may be necessary that when the door operating system is put back into operation after an emergency shutdown device has been actuated, the door does not make any sudden or too rapid movements.

Eine Türbetätigungsanlage der eingangs genannten Art ist aus der DE-A-3225536 bekannt. Bei Betätigung der ersten Notabschalteinrichtung dieser Türbetätigungsanlage wird eine die Druckbeaufschlagung der Wirkflächen des Betätigungskolbens steuernde Ventileinrichtung derart gesteuert, dass beide Wirkflächen des Betätigungskolbens druckentlastet werden. Zu diesem Zweck ist der Ventileinrichtung ein als UND-Glied ausgebildetes Sperrventil vorgeschaltet. Das Sperrventil ist derart ausgebildet, dass es bei Druckbeaufschlagung an zwei Steueranschlüssen einen Druck aussteuert. Dieser ausgesteuerte Druck wird an die Ventileinrichtung weitergeleitet. Bei Betätigung der ersten Notabschalteinrichtung wird das Sperrventil an beiden Steueranschlüssen druckbeaufschlagt. Das Sperrventil beaufschlagt daraufhin die Ventileinrichtung derart, dass diese so gestellt wird, dass beide Wirkflächen des Betätigungskolbens druckentlastet werden.A door operating system of the type mentioned is known from DE-A-3225536. When the first emergency shutdown device of this door actuation system is actuated, a valve device controlling the pressurization of the active surfaces of the actuating piston is controlled such that both active surfaces of the actuating piston are relieved of pressure. For this purpose, the valve device is preceded by a check valve designed as an AND gate. The check valve is designed in such a way that, when pressure is applied to two control connections, it regulates a pressure. This modulated pressure is passed on to the valve device. When the first emergency shutdown device is actuated, the shut-off valve is pressurized at both control connections. The check valve then acts on the valve device in such a way that it is set such that both active surfaces of the actuating piston are relieved of pressure.

Diese Türbetätigungsanlage bietet den Vorteil, dass sie ohne zusätzlichen Aufwand an Bauelementen der ersten Notabschalteinrichtung die Überwachung beider Bewegungsrichtungen der Tür ermöglicht. Andererseits ist zur Erzielung der oben erwähnten Sicherheitsfunktion bei diesem Stand der Technik das Sperrventil erforderlich. Diese Einrichtung und damit auch die Türbetätigungsanlage selbst ist kompliziert, störungsanfällig und aufwendig.This door actuation system offers the advantage that it enables monitoring of both directions of movement of the door without additional expenditure on components of the first emergency shutdown device. On the other hand, the check valve is required to achieve the above-mentioned safety function in this prior art. This device and thus also the door actuation system itself is complicated, prone to failure and expensive.

Aus der DE-A-3234615 ist es bekannt, eine Türbewegung im Notfall durch Druckbeaufschlagung der gerade der Türbewegung entgegengerichteten Wirkfläche des Betätigungskolbens zu bremsen bzw. zu dämpfen. Diese Schrift zeigt insbesondere in Fig. 2 eine Türbetätigungsanlage mit einer Ventileinrichtung (dort 17'), mittels derer die Wirkflächen eines Betätigungskolbens (dort 11') über getrennte Druckmittelzuleitungen (dort 15', 16') mit Druck beaufschlagbar sind. Als erste Notabschalteinrichtung weist sie eine Kombination aus einem Mindestdruckschalter (dort 34') und einem Sperrventil (dort 31') auf, welche bei Unterschreiten eines Mindestdruckes (als Mass für einen vorbestimmten Türwiderestand) an der der gerade die Türbewegung bestimmenden Wirkfläche des Betätigungskolbens (dort 11') die Trennung der Druckmittelzuleitungen (dort 15', 16') aufhebt. Die erste Notabschalteinrichtung wirkt nur hinsichtlich einer Türbewegungsrichtung. Für die Überwachung auch der anderen Türbewegungsrichtung ist eine zweite vollständige erste Notabschalteinrichtung mit Mindestdruckschalter und Sperrventil und damit ein erheblicher Aufwand erforderlich. Ist beim bekannten Gegenstand eine zweite Notabschalteinrichtung (dort 17', 21') mit einem Nothahn (dort 21') vorgesehen, so ist eine Bremsung bzw. Dämpfung der Türbewegung bei dessen Rückbetätigung nur bei Vorhandensein der ersten Notabschalteinrichtung und auch nur in der von dieser überwachten Türbewegungsrichtung möglich. Eine Bremsung bzw. Dämpfung der Türbewegung in der anderen Türbewegungsrichtung bei Rückbetätigung des Nothahns (dort 21') setzt zusätzliche Massnahmen, wie beispielsweise das nicht näher beschriebene Drosselventil (dort 20') oder eine zweite vollständige erste Notabschalteinrichtung, voraus. Eine gebremste bzw. gedämpfte Türbewegung, wenn nur die zweite Notabschalteinrichtung (dort 17', 21') mit dem Nothahn (dort 21') vorgesehen ist, bedarf in jedem Falle zusätzlicher Einrichtungen, wie beispielsweise des Drosselventils (dort 20').From DE-A-3234615 it is known to brake or dampen a door movement in an emergency by pressurizing the active surface of the actuating piston which is just opposite the door movement. This document shows in particular in FIG. 2 a door actuation system with a valve device (there 17 '), by means of which the active surfaces of an actuating piston (there 11') can be pressurized via separate pressure medium supply lines (there 15 ', 16'). As the first emergency shutdown device, it has a combination of a minimum pressure switch (there 34 ') and a shut-off valve (there 31'), which, when the pressure falls below a minimum (as a measure of a predetermined door resistance), on the active surface of the actuating piston which determines the door movement (there 11 ') cancels the separation of the pressure medium supply lines (there 15', 16 '). The first emergency shutdown device only works with respect to one direction of door movement. To monitor the other direction of door movement, a second complete first emergency shutdown device with a minimum pressure switch and shut-off valve is required, and therefore considerable effort. If, in the known object, a second emergency shutdown device (there 17 ', 21') with an emergency valve (there 21 ') is provided, braking or damping of the door movement upon its re-actuation is only possible when the first emergency shutdown device is present and also only in the latter monitored door movement direction possible. Braking or damping the door movement in the other door movement direction when the emergency valve is actuated again (there 21 ') requires additional measures, such as the throttle valve (there 20') or a second, complete, first emergency shutdown device. A braked or damped door movement, if only the second emergency shutdown device (there 17 ', 21') with the emergency valve (there 21 ') is provided, in any case requires additional devices, such as the throttle valve (there 20').

Der Erfindung liegt die Aufgabe zugrunde, eine Türbetätigungsanlage der eingangs genannten Art unter Wahrung ihrer Vorteile mit einfachen Mitteln so zu verbessern, dass sie die erwähnte Sicherheitsfunktion ohne komplizierte, störungsanfällige und aufwendige Einrichtungen erbringt.The invention has for its object to improve a door control system of the type mentioned while preserving its advantages with simple means so that it provides the safety function mentioned without complicated, fault-prone and complex devices.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. Weiterbildungen und vorteilhafte Ausgestaltungen sind in den Unteransprüchen angegeben.This object is achieved by the characterizing features of patent claim 1. Further developments and advantageous refinements are specified in the subclaims.

Die Erfindung geht, vereinfacht ausgedrückt, von dem Gedanken aus, einen Kraftüberschuss am Betätigungskolben, welcher zur Verletzung bzw. Beschädigung in der Türbewegung erfasster Gegenstände, worunter auch Personen verstanden sein sollen, führen kann, durch die gleichzeitige Druckbeaufschlagung beider Wirkfiächen des Betätigungskotbens zu verhindern.In simple terms, the invention is based on the idea of preventing an excess of force on the actuating piston, which can lead to injury or damage to objects detected in the door movement, which should also be understood to mean persons, by the simultaneous pressurization of both active surfaces of the actuating piston.

In vorteilhafter Weise ermöglicht die Erfindung die einfache Ausbildung einer etwa vorgesehenen zweiten Notabschalteinrichtung mit einem Nothahn. So kann beispielsweise ein im Stand der Technik für die zweite Nota,bschalteinrich- tung vorgesehenes, dem Sperrventil als ODER-Glied in Reihe vorgeschaltetes Wechselventil entfallen. Dieses Wechselventil ermöglicht beim Stand der Technik über seinen ersten Strömungsweg die Beaufschlagung der Ventileinrichtung seitens des Sperrventils und über seinen zweiten Strömungsweg deren Beaufschlagung seitens des Nothahns. Die Erfindung ermöglicht demgegenüber eine Notabschaltung durch beide Notabschalteinrichtungen mittels der gleichen Notventileinrichtung und damit auch eine Anordnung der zweiten Notabschalteinrichtung als alleinige Notabschalteinrichtung.Advantageously, the invention enables the simple design of a second emergency shutdown device, if provided, with an emergency valve. For example, a changeover valve provided in the prior art for the second emergency switching device and connected in series as an OR element to the check valve can be omitted. In the prior art, this shuttle valve enables the valve device to be acted upon by the check valve and via its first flow path second flow path, the action on the part of the emergency valve. In contrast, the invention enables an emergency shutdown by both emergency shutdown devices by means of the same emergency valve device and thus also an arrangement of the second emergency shutdown device as the sole emergency shutdown device.

Dadurch, dass auch bei Rückbetätigung des etwa vorhandenen Nothahns beide Wirkflächen des oben erwähnten Betätigungskolbens druckbeaufschlagt werden, stellt die Erfindung auch sicher, dass plötzliche oder zu schnelle Bewegungen der Tür bei Wiederinbetriebnahme nach einer Betätigung der zweiten Notabschalteinrichtung vermieden werden, wodurch ein für diesen Zweck im Stand der Technik vorgesehenes umschaltbares aufwendiges Drosselventil überflüssig wird.Characterized in that both active surfaces of the above-mentioned actuating piston are pressurized even when the emergency valve, if present, is actuated again, the invention also ensures that sudden or too rapid movements of the door when restarting after actuation of the second emergency shutdown device are avoided, so that for this purpose in State-of-the-art switchable, complex throttle valve becomes superfluous.

Die oben erwähnte erste Notabschalteinrichtung kann den Türwiderstand in Öffnungsrichtung (Öffnungswiderstand) und/oder in Schliessrichtung (Schliesswiderstand) überwachen.The above-mentioned first emergency shutdown device can monitor the door resistance in the opening direction (opening resistance) and / or in the closing direction (closing resistance).

In einer vorteilhaften Ausbildung überwacht die erste Notabschalteinrichtung den Öffnungswiderstand der Tür, während deren Schliesswiderstand durch eine eine Reversiereinrichtung steuernde Überwachungseinrichtung überwacht wird.In an advantageous embodiment, the first emergency shutdown device monitors the opening resistance of the door, while its closing resistance is monitored by a monitoring device controlling a reversing device.

In vorteilhafter Weise können die Ventileinrichtung aus einem ersten und einem zweiten 3/2-Wegeventil, welche jeweils einer Wirkfläche des Betätigungskolbens zugeordnet sind, und die Notventileinrichtung aus einem dritten 3/2-Wegeventil bestehen.The valve device can advantageously consist of a first and a second 3/2-way valve, each of which is assigned to an active surface of the actuating piston, and the emergency valve device can consist of a third 3/2-way valve.

In vorteilhafter Weise kann die erfindungsgemässe Türbetätigungsanlage auch mit einer Betriebsschalteinrichtung kombiniert werden, bei deren Betätigung die Wirkflächen des Türbetätigungskolbens abwechselnd druckbeaufschlagt und druckentlastet werden.In an advantageous manner, the door actuation system according to the invention can also be combined with an operating switch device, the actuation surfaces of the door actuation piston being alternately pressurized and depressurized when actuated.

Eine Kombination der erfindungsgemässen Türbetätigungsanlage mit einer Betriebsschalteinrichtung lässt sich in vorteilhafter Weise dadurch erzielen, dass das erste und das zweite 3/2-Wegeventil jeweils mit einer zweiten Stelleinrichtung, die im wesentlichen durch die Betriebsschalteinrichtung betätigt wird, und einer Stelleinrichtung, die zur Sicherstellung der oben erwähnten Sicherheitsfunktionen dient, versehen werden.A combination of the door actuation system according to the invention with an operating switching device can advantageously be achieved in that the first and the second 3/2-way valve each have a second actuating device, which is actuated essentially by the operating switching device, and an actuating device, which ensures the security functions mentioned above, are provided.

In vorteilhafter Weise können die zweiten Stelleinrichtungen des ersten und des zweiten 3/2-Wegeventils mechanisch derart in Wirkverbindung stehen, dass bei Umstellung des einen 3/2-Wegeventils aus seiner ersten Schaltstellung in seine zweite Schaltstellung das andere 3/2-Wegeventil gleichzeitig in entgegengesetzter Richtung gestellt wird.Advantageously, the second actuating devices of the first and the second 3/2-way valve can be mechanically operatively connected such that when the one 3/2-way valve is switched from its first switching position to its second switching position, the other 3/2-way valve is simultaneously in opposite direction.

In einer bevorzugten Ausführungsform ist die Erfindung mit elektrischer oder elektronischer Steuerung und elektro-pneumatischer Verstellung der Ventileinrichtung ausgebildet.In a preferred embodiment, the invention is designed with electrical or electronic control and electro-pneumatic adjustment of the valve device.

Wie für den Fachmann ersichtlich, sind auch bevorzugte Ausführungsformen mit anderen Arten der Steuerung und Verstellung realisierbar. So können die zweiten Stelleinrichtungen des ersten und des zweiten 3/2-Wegeventils sowie die Stelleinrichtung des dritten 3/2-Wegeventils von Hand betätigbar sein. In diesem Fall könnte der Schliesswiderstand vom Bedienungspersonal visuell überwacht werden, wodurch eine Steuereinrichtung erübrigt würde. Auch eine mechanische Steuerung mit/oder ohne Steuereinrichtung mit mechanischen Logik-Bausteinen wäre ausführbar. Schliesslich wäre auch eine reine Druckmittelsteuerung mit einer aus Druckmittel-Logik-Bausteinen, insbesondere pneumatischen, zusammengesetzten Steuereinrichtung ausführbar. Auch Kombinationen der erwähnten Steuerungsarten sowie solche der erwähnten Steuerungsarten mit elektrischen oder elektronischen Bauelementen sind ausführbar. In der Steuereinrichtung einer bevorzugten Ausführungsform sind eine Notabschaltautomatik und eine Reversiereinrichtung enthalten. Diese können aber auch getrennt, jede für sich oder zusammengefasst, angeordnet werden. Der in einer bevorzugten Ausführungsform manuell betätigte Nothahn kann in anderen bevorzugten Ausführungsformen druckmittel- oder elektrisch, z.B. über einen Stellmagneten, betätigbar ausgebildet sein.As can be seen by the person skilled in the art, preferred embodiments with other types of control and adjustment can also be implemented. For example, the second actuating devices of the first and second 3/2-way valve and the actuating device of the third 3/2-way valve can be actuated by hand. In this case, the closing resistance could be monitored visually by the operating personnel, which would make a control device unnecessary. A mechanical control with / or without a control device with mechanical logic modules would also be feasible. Finally, a pure pressure medium control would also be possible with a control device composed of pressure medium logic modules, in particular pneumatic ones. Combinations of the control types mentioned and those of the control types mentioned with electrical or electronic components can also be carried out. The control device of a preferred embodiment contains an automatic emergency shutdown and a reversing device. However, these can also be arranged separately, each individually or in summary. The manually operated emergency valve in a preferred embodiment can be pressure medium or electrical, e.g. be actuated via an actuating magnet.

Schliesslich kann der Türantrieb mit einem axial verschiebbaren Betätigungskolben, aber auch mit anderen Stellmotoren, z.B. mit einem Rotationskolben, ausgebildet werden.Finally, the door drive can be operated with an axially displaceable actuating piston, but also with other servomotors, e.g. with a rotary piston.

Die Erfindung bewirkt, dass bei Betätigung der ersten Notabschalteinrichtung zusätzlich zu der gerade beaufschlagten Wirkfläche auch die Gegenfläche des Türantriebs druckbeaufschlagt wird. Dadurch wird auf der Gegenfläche eine Gegenkraft zur Betätigungskraft aufgebaut, die den geforderten Sicherheitseffekt, nämlich die Verletzung bzw. die Beschädigung bei der Türbewegung erfasster Personen bzw. Sachen verhindern, hervorruft.The invention has the effect that, when the first emergency shutdown device is actuated, the counter surface of the door drive is also pressurized in addition to the active surface just acted upon. As a result, a counterforce to the actuating force is built up on the counter surface, which causes the required security effect, namely the injury or damage to persons or objects detected during the door movement.

In vorteilhafter Weise können die Öffnungsfläche und die Schliessfläche im Verhältnis zueinander so ausgelegt werden, dass die resultierende Kraft so gering ist, dass die Tür infolge von Reibung an den Türdichtungen und im Übertragungsmechanismus zum Stillstand kommt oder sich noch langsam in ihre Endstellung öffnen oder schliessen kann.In an advantageous manner, the opening area and the closing area can be designed in relation to one another in such a way that the resulting force is so low that the door comes to a standstill as a result of friction on the door seals and in the transmission mechanism, or can still slowly open or close in its end position .

Bei Wiederinbetriebnahme der Türbetätigungsanlage nach einer Notabschaltung durch die zweite Notabschalteinrichtung bewirkt die Erfindung, dass die Öffnungs- und die Schliessfläche des Türantriebs gleichzeitig druckbeaufschlagt werden und sich auch in diesem Fall, wie vorstehend beschrieben, ein Stillstand oder eine langsame Türbewegung einstellt.When the door actuation system is put back into operation after an emergency shutdown by the second emergency shutdown device, the invention causes the opening and closing surfaces of the door drive to be pressurized at the same time and, as described above, to come to a standstill or slow door movement in this case as well.

In vorteilhafter Weise ermöglicht die Erfindung auch Ausführungen mit Druckluft oder mit hydraulischen Fluids als Druckmittel.Advantageously, the invention also enables designs with compressed air or with hydraulic fluids as pressure medium.

Die Erfindung wird nachstehend anhand von Ausführungsbeispielen, die in den Zeichnungen dargestellt sind, erläutert, wobei Positionen mit gleichen Funktionen durchgehend gleiche Bezugszeichen zugeordnet werden.The invention is explained below on the basis of exemplary embodiments which are illustrated in the drawings, positions with the same functions being assigned the same reference symbols throughout.

Es zeigen:

  • Fig. 1 eine elektro-pneumatische Türbetätigungsanlage für einen Omnibus,
  • Fig. 2 ein Türventil für die Türbetätigungsanlage nach Fig.1.
Show it:
  • 1 shows an electro-pneumatic door actuation system for a bus,
  • 2 shows a door valve for the door actuation system according to FIG. 1.

Die Fig. 1 zeigt eine pneumatische Türbetätigungsanlage mit einem Betätigungskolben 22, der eine Öffnungsfläche 21 und eine Schliessfläche 23 aufweist, und mit einem durch eine Türschliesssäule 24 symbolisierten Übertragungsmechanismus einen Türantrieb bildet.1 shows a pneumatic door actuation system with an actuation piston 22, which has an opening surface 21 and a closure surface 23, and forms a door drive with a transmission mechanism symbolized by a door locking column 24.

Durchgehend gezeichnete Linien stellen ein Druckluftleitungssystem dar.Continuous lines represent a compressed air line system.

Die Öffnungsfläche 21 ist mit dem Arbeitsanschluss eines ersten 3/2-Wegeventils 10, die Schliessfläche 23 ist mit dem Arbeitsanschluss eines zweiten 3/2-Wegeventils 26 verbunden. Zwischen den Versorgungsanschlüssen der genannten 3/2-Wegeventile 10 bzw. 26 und einem als Druckquelle dienenden Druckluftbehälter 1 ist ein als 4/2-Wegeventil ausgebildeter Nothahn 3 angeordnet. Das erste und das zweite 3/2-Wegeventil 10, 26 bilden eine Ventileinrichtung 10, 26.The opening surface 21 is connected to the working connection of a first 3/2-way valve 10, the closing surface 23 is connected to the working connection of a second 3/2-way valve 26. An emergency valve 3 designed as a 4/2-way valve is arranged between the supply connections of the 3/2-way valves 10 and 26 mentioned and a compressed air tank 1 serving as a pressure source. The first and the second 3/2-way valve 10, 26 form a valve device 10, 26.

Das erste und das zweite 3/2-Wegeventil 10 bzw. 26 weisen je eine zweite Stelleinrichtung 8 bzw. 25 und eine Stelleinrichtung 17 bzw. 29 auf. Ausserdem stehen sie über ein Koppelglied 18 in mechanischer Wirkverbindung. Die jeweils zweite Stelleinrichtung 8 bzw. 25 ist als pneumatische Betätigungseinrichtung mit Magnetvorsteuerventil ausgebildet. Die jeweilige Stelleinrichtung 17 bzw. 29 ist pneumatisch betätigbar. Das erste und das zweite 3/2-Wegeventil 10 bzw. 26 weisen jeweils eine erste Schaltstellung 16 bzw. 28 und eine zweite Schaltstellung 11 bzw. 27 auf. In der ersten Schaltstellung 16 bzw. 28 der 3/2-Wegeventile 10 bzw. 26 ist die jeweils zugeordnete Wirkfläche 21 bzw. 23 mit dem Versorgungsan- . schluss des jeweiligen 3/2-Wegeventils 10 bzw. 26 verbunden. In der zweiten Schaltstellung 11 bzw. 27 ist die dem jeweiligen 3/2-Wegeventil 10 bzw. 26 zugeordnete Wirkfläche 21 bzw. 23 entlüftet. Aus der ersten 16 bzw. 28 in die zweite Schaltstellung 11 bzw. 27 ist jedes 3/2-Wegeventil 10 bzw. 26 durch die jeweils zweite Stelleinrichtung 8 bzw. 25 umstellbar. Bei dieser Umstellung wird das gerade in seiner zweiten Schaltstellung 11 bzw. 27 befindliche 3/2-Wegeventil 10 bzw. 26 über das Koppelglied 18 in seine erste Schaltstellung 16 bzw. 28 mitgenommen.The first and the second 3/2-way valve 10 or 26 each have a second actuating device 8 or 25 and an actuating device 17 or 29. In addition, they are mechanically operatively connected via a coupling member 18. The respective second actuating device 8 or 25 is designed as a pneumatic actuating device with a solenoid pilot valve. The respective adjusting device 17 or 29 can be actuated pneumatically. The first and the second 3/2-way valve 10 or 26 each have a first switching position 16 or 28 and a second switching position 11 or 27. In the first switching position 16 or 28 of the 3/2-way valves 10 or 26, the respectively assigned active surface 21 or 23 with the supply connection. Connection of the respective 3/2-way valve 10 or 26 connected. In the second switching position 11 or 27, the active surface 21 or 23 assigned to the respective 3/2-way valve 10 or 26 is vented. From the first 16 or 28 to the second switching position 11 or 27, each 3/2-way valve 10 or 26 can be changed over by the respective second actuating device 8 or 25. During this changeover, the 3/2-way valve 10 or 26, which is currently in its second switching position 11 or 27, is taken into its first switching position 16 or 28 via the coupling member 18.

Über die jeweilige Stelleinrichtung 17 bzw. 29 sind die 3/2-Wegeventile 10 bzw. 26 unabhängig von der jeweils zweiten Stelleinrichtung 8 bzw. 25 und ohne Koppelung mit dem jeweils anderen 3/2-Wegeventil 10 bzw. 26 aus ihrer zweiten Schaltstellung 11 bzw. 27 in ihre erste Schaltstellung 16 bzw. 28 stellbar.Via the respective actuating device 17 or 29, the 3/2-way valves 10 or 26 are independent of the respective second actuating device 8 or 25 and without coupling to the other 3/2-way valve 10 or 26 from their second switching position 11 or 27 in their first switching position 16 or 28 adjustable.

Die Stelleinrichtungen 17 bzw. 29 des ersten und des zweiten 3/2-Wegeventils 10 bzw. 26 sind gemeinsam mit dem Ausgang, nachstehend, Arbeitsanschluss, eines als Notventileinrichtung ausgebildeten dritten 3/2-Wegeventils 5 verbunden. Das dritte 3/2-Wegeventil 5 ist, z.B. durch eine Feder, in eine Grundstellung 31 vorgespannt und weist ausserdem eine Umschaltstellung 4 und eine als Stellmagnet 6 ausgebildete Stelleinrichtung 6 auf, bei deren Aktivierung es in die Umschaltstellung 4 gestellt wird. Der Arbeitsanschluss des dritten 3/2-Wegeventils 5 ist in der genannten Grundstellung 31 mit einem zweiten Eingang 32 und in der genannten Umschaltstellung 4 mit einem ersten Eingang 30 des dritten 3/2-Wegeventils 5 verbunden.The actuating devices 17 and 29 of the first and the second 3/2-way valve 10 and 26 are connected together with the outlet, hereinafter referred to as the working connection, of a third 3/2-way valve 5 designed as an emergency valve device. The third 3/2-way valve 5 is e.g. biased by a spring into a basic position 31 and also has a changeover position 4 and an actuating device 6 designed as an actuating magnet 6, upon activation of which it is placed in the changeover position 4. The working connection of the third 3/2-way valve 5 is connected to a second input 32 in said basic position 31 and to a first input 30 of the third 3/2-way valve 5 in said switching position 4.

Der Nothahn 3 ist manuell in eine Normalschaltstellung 34 und eine Notschaltstellung 2 stellbar. Er weist einen ersten und einen zweiten Arbeitsanschluss 33 bzw. 35, einen mit dem Druckluftbehälter 1 verbundenen Versorgungsanschluss 36 und eine Entlüftung auf. In der Normalschaltstellung 34 sind der erste Arbeitsanschluss 33 mit dem Versorgungsanschluss 36 und der zweite Arbeitsanschluss 35 mit der Entlüftung verbunden. In der Notschaltstellung 2 ist der erste Arbeitsanschluss 33 mit der Entlüftung und der zweite Arbeitsanschluss mit dem Versorgungsanschluss 36 verbunden. Mit dem ersten Arbeitsanschluss 33 des Nothahns 3 sind einerseits die Versorgungsanschlüsse des ersten und des zweiten 3/2-Wegeventils 10 bzw. 26 und andererseits der erste Eingang 30 des dritten 3/2-Wegeventils 5 verbunden. Mit dem zweiten Arbeitsanschluss 35 des Nothahns 3 ist der zweite Eingang 32 des dritten 3/2-Wegeventils 5 verbunden.The emergency valve 3 can be set manually into a normal switch position 34 and an emergency switch position 2. It has a first and a second working connection 33 and 35, a supply connection 36 connected to the compressed air tank 1 and a vent. In the normal switching position 34, the first working connection 33 is connected to the supply connection 36 and the second working connection 35 is connected to the vent. In the emergency switch position 2, the first working connection 33 is connected to the vent and the second working connection is connected to the supply connection 36. The supply connections of the first and the second 3/2-way valve 10 and 26 and on the other hand the first input 30 of the third 3/2-way valve 5 are connected to the first working connection 33 of the emergency valve 3. The second inlet 32 of the third 3/2-way valve 5 is connected to the second working connection 35 of the emergency valve 3.

In Druckluftleitungen zwischen den Arbeitsanschlüssen des ersten und des zweiten 3/2-Wegeventils 10 bzw. 26 und der jeweils zugeordneten Wirkfläche 21 bzw. 23 des Betägigungskolbens 22 sind Drosseln 19 bzw. 20 angeordnet. Mitteils dieser Drosseln wird die Anpassung der Charakteristik der Türbetätigungsanlage an die des Türantriebs und der Tür, z.B. an die Reibungsverhältnisse im Übertragungsmechanismus und an den Türdichtungen, erleichtert. Es liegt auf der Hand, dass im Einzelfall auch nur eine Drossel in einer Leitung angeordnet sein muss, bzw. Drosseln überhaupt nicht erforderlich sind.Throttles 19 and 20 are arranged in compressed air lines between the working connections of the first and the second 3/2-way valve 10 or 26 and the respectively assigned active surface 21 or 23 of the actuating piston 22. By means of these chokes, the adaptation of the characteristics of the door operating system to that of the door drive and the door, e.g. to the friction in the transmission mechanism and on the door seals. It is obvious that in individual cases only one choke has to be arranged in a line, or chokes are not required at all.

Zur Steuerung der Magnete der zweiten Stelleinrichtungen 8 bzw. 25 des ersten und des zweiten 3/2-Wegeventils 10 bzw. 26 und des Stellmagneten 6 des dritten 3/2-Wegeventils 5 weist das vorliegende Ausführungsbeispiel eine elektrische oder elektronische Auswerte- und Schalteinrichtung 9, im folgenden kurz Schalteinrichtung 9 genannt, auf. Diese bildet in Verbindung mit einem Schalter 7 eine Betriebsschalteinrichtung und enthält ausserdem eine Notabschaltautomatik für eine erste Notabschalteinrichtung und eine Reversiereinrichtung.To control the magnets of the second actuating devices 8 and 25 of the first and the second 3/2-way valve 10 and 26 and the actuating magnet 6 of the third 3/2-way valve 5, the present exemplary embodiment has an electrical or electronic evaluation and switching device 9 , hereinafter referred to as switching device 9, on. In conjunction with a switch 7, this forms an operating switching device and also contains an automatic emergency shutdown device for a first emergency shutdown device and a reversing device.

Die Notabschaltautomatik bildet zusammen mit einer Überwachungseinrichtung 14, die den Öffnungswiderstand der Tür überwacht, die erste Notabschalteinrichtung, die, wenn die Tür in ihrer Öffnungsbewegung einen Gegenstand erfasst, d.h. wenn der Öffnungswiderstand einen vorbestimmten Wert erreicht, dessen Verletzung bzw. Beschädigung durch Minderung der Türöffnungskraft verhindert. Dabei sollen, wie auch im folgenden, unter «Gegenstand» sowohl Personen als auch Sachen verstanden werden.The automatic emergency shutdown, together with a monitoring device 14 which monitors the opening resistance of the door, forms the first emergency shutdown device which, when the door detects an object in its opening movement, ie when the opening resistance reaches a predetermined value, violates or damages it by reducing the door opening force prevented. Here, as in the following, the term “object” means both people and things.

Die Reversiereinrichtung verhindert, wenn die Tür in ihrer Schliessbewegung Gegenstände erfasst, deren Verletzung bzw. Beschädigung. Zu diesem Zweck wertet die Reversiereinrichtung Signale einer den Schliesswiderstand der Tür überwachenden Überwachungseinrichtung 13 derart aus, dass bei Erreichen eines vorbestimmten Schliesswiderstands der Türantrieb aus der Schliessbewegung in die Öffnungsbewegung umgesteuert wird.The reversing device prevents damage or damage if the door detects objects in their closing movement. For this purpose, the reversing device evaluates signals from a monitoring device 13 monitoring the closing resistance of the door in such a way that when a predetermined closing resistance is reached, the door drive is reversed from the closing movement into the opening movement.

Die Überwachungseinrichtungen 13 und 14 sind im vorliegenden Ausführungsbeispiel als Differenzdruckschalter ausgebildet, der auf eine vorbestimmte Differenz zwischen den auf die Schliessfläche 23 und die Öffnungsfläche 21 wirkenden Drücken anspricht. Die Überwachungseinrichtungen 13 bzw. 14 können auch als Sensoren ausgebildet sein, die andere Kenngrössen für den jeweiligen Türwiderstand, beispielsweise die Öffnungsgeschwindigkeit bzw. die Schliessgeschwindigkeit der Tür, sensieren.In the present exemplary embodiment, the monitoring devices 13 and 14 are designed as differential pressure switches, which respond to a predetermined difference between the pressures acting on the closing surface 23 and the opening surface 21. The monitoring devices 13 and 14 can also be designed as sensors which sense other parameters for the respective door resistance, for example the opening speed or the closing speed of the door.

Der Schalteinrichtung 9 sind ausserdem noch Endschalter 12 bzw. 15 zugeordnet, deren jeder einer Türendstellung zugeordnet ist. Diese Endschalter schalten, wenn und solange sich die Tür in der jeweils zugeordneten Endstellung befindet, die Überwachungseinrichtungen 13 bzw. 14 ab. Ohne diese Endabschaltung würde dieSchalteinrichtung 9 in Verbindung mit der jeweiligen Überwachungseinrichtung 13 bzw. 14 wie auf einen erhöhten Türwiderstand reagieren.The switching device 9 are also assigned limit switches 12 and 15, each of which is assigned to a door end position. These limit switches switch off the monitoring devices 13 and 14 when and as long as the door is in the respectively assigned end position. Without this limit switch, the switching device 9 in connection with the respective monitoring device 13 or 14 would react as if to an increased door resistance.

Die strichpunktierten Linien stellen elektrische Verbindungen zwischen den im vorstehenden genannten Einrichtungen, soweit diese elektrisch oder elektronisch ausgebildet sind, dar.The dash-dotted lines represent electrical connections between the above-mentioned devices, insofar as they are electrical or electronic.

Die vorstehend beschriebene Türbetätigungsanlage funktioniert wie folgt.The door control system described above works as follows.

Im Normalbetrieb befinden sich, wie dargestellt, der Nothahn 3 in seiner Normalschaltstellung 34 und das dritte 3/2-Wegeventil 5 in seiner Grundstellung 31. Dadurch sind das erste und das zweite 3/2-Wegeventil 10 bzw. 26 an ihren Versorgungsanschlüssen druckbeaufschlagt und an ihren Stelleinrichtungen 17 bzw. 29 entlüftet. Zur Betätigung der Betriebsschalteinrichtung wird der Schalter 7 willkürlich betätigt, woraufhin über die Schalteinrichtung 9 und die jeweilige zweite Stelleinrichtung 8 bzw. 25 dasjenige erste oder zweite 3/2-Wegeventil 10 bzw. 26, welches sich gerade in seiner ersten Schaltstellung 16 bzw. 28 befindet, in seine zweite Schaltstellung 11 bzw. 27 umgestellt wird.In normal operation, as shown, the emergency valve 3 is in its normal switching position 34 and the third 3/2-way valve 5 in its basic position 31. As a result, the first and second 3/2-way valves 10 and 26 are pressurized at their supply connections and vented at their actuators 17 and 29. To actuate the operating switching device, the switch 7 is actuated arbitrarily, whereupon, via the switching device 9 and the respective second actuating device 8 or 25, the first or second 3/2-way valve 10 or 26 which is currently in its first switching position 16 or 28 is switched to its second switching position 11 or 27.

Mit anderen Worten: bei Betätigung des Schalters 7 stellt die Schalteinrichtung 9 fest, in welcher Bewegungsrichtung sie die Tür vorher gesteuert hatte, und steuert sie jetzt in die entgegengesetzte Bewegungsrichtung.In other words: when the switch 7 is actuated, the switching device 9 determines the direction in which it had previously controlled the door and now controls it in the opposite direction of movement.

In der Darstellung der Fig. 1 ist, wie die eingetragenen Strömungspfeile des ersten und des zweiten 3/2-Wegeventils 10 bzw. 26 andeuten, die Tür in einer Schliessbewegung. Erfasst die Tür dabei einen Gegenstand, so steigt der Schliesswiderstand an. Bei einem vorbestimmten Wert des Schliesswiderstands gibt aufgrund der von der Überwachungseinrichtung 13 abgegebenen Signale die Schalteinrichtung 9 in Verbindung mit ihrer Reversiereinrichtung einen Impuls an den Magneten der zweiten Stelleinrichtung 25 des zweiten 3/2-Wegeventils 26, welches dadurch aus seiner ersten Schaltstellung 28 in seine zweite Schaltstellung 27 gestellt wird und dabei über das Koppelglied 18 das erste 3/2-Wegeventil 10 aus seiner zweiten Schaltstellung 11 in seine erste Schaltstellung 16 mitnimmt. Durch die beschriebene Umstellung des ersten und des zweiten 3/2-Wegeventils 10 bzw. 26 wird die Schliessfläche 23 entlüftet und die Öffnungsfläche 21 druckbeaufschlagt, mit dem Ergebnis, dass die Tür aus ihrer Schliessbewegung in ihre Öffnungsbewegung umkehrt (reversiert).1, as the flow arrows of the first and second 3/2-way valves 10 and 26 indicate, the door is in a closing movement. If the door detects an object, the closing resistance increases. At a predetermined value of the closing resistance, the switching device 9, in conjunction with its reversing device, gives a pulse to the magnet of the second actuating device 25 of the second 3/2-way valve 26 which, as a result, moves from its first switching position 28 into its position second switching position 27 is set and thereby takes the first 3/2-way valve 10 from its second switching position 11 into its first switching position 16 via the coupling member 18. Through the described conversion of the first and the second 3/2-way valve 10 or 26, the closing surface 23 is vented and the opening surface 21 is pressurized, with the result that the door reverses (reverses) from its closing movement into its opening movement.

Bei einer Öffnungsbewegung der Tür befindet sich das erste 3/2-Wegeventil 10 in seiner ersten Schaltstellung 16 und das zweite 3/2-Wegeventil 26 in seiner zweiten Schaltstellung 27. Erfasst die Tür bei ihrer Öffnungsbewegung einen Gegenstand, so steigt der Öffnungswiderstand. Bei einem vorbestimmten Wert des Öffnungswiderstands gibt aufgrund der von der Überwachungseinrichtung 14 abgegebenen Signale die Schalteinrichtung 9 in Verbindung mit ihrer Notabschaltautomatik einen Impuls als Notsignal an den Stellmagneten 6 des dritten 3/2-Wegeventils 5. Dieses wird während der Impulsdauer in seine Umschaltstellung 4 gestellt und verbindet dabei die Stelleinrichtung 17 bzw. 29 des ersten und des zweiten 3/2-Wegeventils 10 bzw. 26 mit seinem druckbeaufschlagten ersten Eingang 30 mit dem Ergebnis, dass die Stelleinrichtungen 17 bzw. 29 ebenfalls druckbeaufschlagt werden, wodurch das zweite 3/2-Wegeventil 26 aus seiner zweiten Schaltstellung in seine erste Schaltstellung 28 gestellt wird. Nunmehr wird auch die Schliessfläche 23 des Betätigungskolbens 22 druckbeaufschlagt, wodurch die Öffnungsbewegung der Tür abgebremst oder abgebrochen oder umgekehrt, wird. Über das Verhältnis der Öffnungsfläche 21 zur Schliessfläche 23 kann die Grösse der Überschusskraft in Öffnungs- bzw. Schliessrichtung derart bestimmt werden, dass die Tür entweder langsam in Öffnungs- oder Schliessrichtung weiterläuft oder infolge der Reibung im Übertragungsmechanismus und an den Türdichtungen zum Stillstand kommt. Es liegt auf der Hand, dass auch über die Auslegung der reibenden Elemente das Verhalten der Tür beeinflussbar ist. Im Ergebnis wird auf jeden Fall die auf den erfassten Gegenstand wirkende Einklemmkraft auf Null bzw. auf ein unschädliches Mass herabgesetzt.When the door is opened, the first 3/2-way valve 10 is in its first switching position 16 and the second 3/2-way valve 26 is in its second switching position 27. If the door detects an object during its opening movement, the opening resistance increases. At a predetermined value of the opening resistance, the switching device 9 gives a pulse as an emergency signal to the actuating magnet 6 of the third 3/2-way valve 5 in connection with its automatic emergency switch-off device on the basis of the signals emitted by the monitoring device 14 and connects the actuating device 17 or 29 of the first and the second 3/2-way valve 10 or 26 with its pressurized first inlet 30 with the result that the actuating devices 17 and 29 are also pressurized, whereby the second 3/2 -Way valve 26 is placed from its second switching position into its first switching position 28. Now the closing surface 23 of the actuating piston 22 is also pressurized, as a result of which the opening movement of the door is braked or broken off or vice versa. The magnitude of the excess force in the opening or closing direction can be determined via the ratio of the opening area 21 to the closing area 23 such that the door either continues slowly in the opening or closing direction or comes to a standstill as a result of the friction in the transmission mechanism and on the door seals. It is obvious that the behavior of the door can also be influenced by the design of the friction elements. As a result, the pinching force acting on the detected object is in any case reduced to zero or to a harmless level.

Durch Umstellung des Nothahns 3 aus seiner Normalschaltstellung 34 in seine Notschaltstellung 2 wird eine zweite Notabschalteinrichtung in Gang gesetzt. Dabei werden, wie die der Normalschaltstellung 34 und der Notschaltstellung 2 des Nothahns 3 zugeordneten Strömungspfeile erkennen lassen, unabhängig von dem gerade bestehenden Betriebszustand der Türbetätigungsanlage die Versorgungsanschlüsse des ersten und des zweiten 3/2-Wegeventils 10 bzw. 26 über die Entlüftung des Nothahns 3 entlüftet. Gleichzeitig werden die Stelleinrichtungen 17 bzw. 29 des ersten und des zweiten 3/2-Wegeventils 10 bzw. 26 über das dritte 3/2-Wegeventil 5 beaufschlagt, wodurch das gerade in seiner zweiten Schaltstellung 11 bzw. 27 befindliche der 3/2-Wegeventile 10 bzw. 26 in seine erste Schaltstellung 16 bzw. 28 gestellt wird. Dadurch wird auch die dem betreffenden 3/2-Wegeventil 10 bzw. 26 zugeordnete Wirkfläche 21 bzw. 23 des Betätigungskolbens 22 über die Entlüftung des Nothahns 3 entlüftet.By switching the emergency valve 3 from its normal switch position 34 to its emergency switch position 2, a second emergency shutdown device is started. As can be seen from the flow arrows assigned to the normal switching position 34 and the emergency switching position 2 of the emergency valve 3, the supply connections of the first and the second 3/2-way valve 10 and 26 are independent of the current operating state of the door operating system the ventilation of the emergency valve 3 is vented. At the same time, the actuating devices 17 and 29 of the first and the second 3/2-way valve 10 or 26 are acted upon via the third 3/2-way valve 5, as a result of which the 3 / 2- Directional valves 10 and 26 is placed in its first switching position 16 and 28. As a result, the active surface 21 or 23 of the actuating piston 22 assigned to the relevant 3/2-way valve 10 or 26 is also vented via the venting of the emergency valve 3.

Nach Betätigung der zweiten Notabschalteinrichtung sind also unabhängig von dem vorherigen Betriebszustand im Ergebnis sowohl die Öffnungsfläche 21 als auch die Schliessfläche 23 des Betätigungskolbens 22 entlüftet.After actuation of the second emergency shutdown device, both the opening surface 21 and the closing surface 23 of the actuating piston 22 are thus vented regardless of the previous operating state.

Der Funktionsablauf bei Wiederinbetriebnahme der Türbetätigungsanlage nach einer Notabschaltung hängt davon ab, welche Notabschalteinrichtung vorher betätigt worden war.The sequence of functions when the door operating system is put back into operation after an emergency shutdown depends on which emergency shutdown device was previously operated.

Nach einer Betätigung der ersten Notabschalteinrichtung und nach einem Reversiervorgang erfolgt die Wiederinbetriebnahme durch Betätigen des Schalters 7.After the first emergency shutdown device has been actuated and after a reversing operation, the device is restarted by actuating the switch 7.

Nach einer Notabschaltung durch die erste Notabschalteinrichtung stehen das erste und das zweite 3/2-Wegeventil 10 bzw. 26 in ihrer ersten Schaltstellung 16 bzw. 28, sowohl die Schliessfläche 23 als auch die Öffnungsfläche 21 des Betätigungskolbens 22 sind also druckbeaufschlagt. Bei Betätigung des Schalters 7 gibt die Steuereinrichtung 9 einen Impuls an den Magneten der zweiten Stelleinrichtung 8 des ersten 3/2-Wegeventils 10, welches dadurch in seine zweite Schaltstellung 11 gestellt wird und dabei die Öffnungsfläche 21 mit der Atmosphäre verbindet. Infolge des Drucküberschusses auf der Schliessfläche 23 wird der Türantrieb in Schliessrichtung in Bewegung versetzt. Der sich dabei von der Öffnungsfläche 21 abbauende Druck bietet ausreichende Gegenkraft, diese Schliessbewegung gebremst ablaufen zu lassen.After an emergency shutdown by the first emergency shutdown device, the first and the second 3/2-way valve 10 or 26 are in their first switching position 16 or 28, so both the closing surface 23 and the opening surface 21 of the actuating piston 22 are pressurized. When the switch 7 is actuated, the control device 9 gives a pulse to the magnet of the second actuating device 8 of the first 3/2-way valve 10, which is thereby placed in its second switching position 11 and thereby connects the opening area 21 to the atmosphere. As a result of the excess pressure on the closing surface 23, the door drive is set in motion in the closing direction. The pressure that is released from the opening surface 21 offers sufficient counterforce to allow this closing movement to take place with a brake.

Nach einen Reversiervorgang steht das erste 3/2-Wegeventil 10 in seiner ersten Schaltstellung 16 und das zweite 3/2-Wegeventil 26 in seiner zweiten Schaltstellung 27; nur die Öffnungsfläche 21 ist also druckbeaufschlagt. Bei einer Betätigung des Schalters 7 gibt in diesem Fall wieder die Schalteinrichtung 9 einen Impuls an den Magneten der zweiten Stelleinrichtung 8 des ersten 3/2-Wegeventils 10. Dieses wird dadurch in seine zweite Schaltstellung 11 gestellt und nimmt dabei über das Koppelglied 18 das zweite 3/2-Wegeventil 26 in seine erste Schaltstellung 28 mit. Dadurch werden wieder die Öffnungsfläche 21 mit der Atmosphäre verbunden und die Schliessfläche 23 druckbeaufschlagt, mit dem Ergebnis, dass wieder eine durch den sich abbauenden Druck auf der Öffnungsfläche 21 abgebremste Schliessbewegung einsetzt.After a reversing process, the first 3/2-way valve 10 is in its first switching position 16 and the second 3/2-way valve 26 is in its second switching position 27; only the opening area 21 is therefore pressurized. When the switch 7 is actuated, the switching device 9 in this case again gives a pulse to the magnet of the second actuating device 8 of the first 3/2-way valve 10. This is thereby placed in its second switching position 11 and takes the second one via the coupling member 18 3/2-way valve 26 in its first switching position 28 with. As a result, the opening surface 21 is again connected to the atmosphere and the closing surface 23 is pressurized, with the result that a closing movement which is slowed down by the pressure on the opening surface 21 starts again.

Die Wiederinbetriebnahme nach einer Notabschaltung durch die zweite Notabschalteinrichtung geschieht durch Umstellung des Nothahns 3 aus seiner Notschaltstellung 2 in seine Normalschaltstellung 34 und nachfolgende Betätigung des Schalters 7. Da in diesem Fall vor Wiederinbetriebnahme das erste und das zweite 3/2-Wegeventil 10 bzw. 26 in ihren ersten Schaltstellungen 16 bzw. 28 stehen, werden bei Umstellung des Nothahns 3 in seine Normalschaltstellung 34 sowohl die Öffnungsfläche 21 als auch die Schliessfläche 23 druckbeaufschlagt mit dem Ergebnis, dass die Tür, je nach vorhandenen Reibungen und Flächenverhältnis am Betätigungskolbens gebremst in Öffnungs- oder Schliessrichtung läuft oder stehenbleibt. Wird jetzt der Schalter 7 betätigt, läuft die vorstehend für den Fall der Wiederinbetriebnahme nach Notabschaltung durch die erste Notabschalteinrichtung geschilderte Wirkungsweise ab. Vorstehende Funktionsbeschreibung verdeutlich, dass der Nothahn auch als einzige Notabschalteinrichtung vorgesehen werden kann.Recommissioning after an emergency shutdown by the second emergency shutdown device is done by switching the emergency valve 3 from its emergency switch position 2 to its normal switch position 34 and then actuating the switch 7. Since in this case the first and the second 3/2-way valve 10 or 26 are in their first switching positions 16 and 28, when the emergency valve 3 is switched to its normal switching position 34, both the opening surface 21 and the closing surface 23 are pressurized, with the result that, depending on the friction and surface area on the actuating piston, the door is braked in the opening or closing direction runs or stops. If the switch 7 is now actuated, the mode of operation described above for the case of restarting after an emergency shutdown by the first emergency shutdown device takes place. The above functional description makes it clear that the emergency valve can also be provided as the only emergency shutdown device.

Die Fig. 2 zeigt ein Türventil für die Türbetätigungsanlage nach Fig. 1, in welchem die Ventileinrichtung 10, 26 und die Notventileinrichtung 5 sowie das Koppelglied 18 in einer Baueinheit zusammengefasst sind.FIG. 2 shows a door valve for the door actuation system according to FIG. 1, in which the valve device 10, 26 and the emergency valve device 5 as well as the coupling member 18 are combined in one structural unit.

Das Türventil weist ein Gehäuse 51 mit einem Versorgungsanschluss 52, einer Entlüftung 54, einem ersten Arbeitsanschluss 79 und einem zweiten Arbeitsanschluss 66 auf. In dem Gehäuse 51 ist eine Bohrung mit einem etwa axial mittig angeordneten, als Kolbenführung 77 ausgebildeten Bereich vergrösserten Durchmessers und als Kolbenschaftführungen 59, 81 ausgebildeten axialen Seitenbereichen kleineren Durchmessers angeordnet.The door valve has a housing 51 with a supply connection 52, a vent 54, a first working connection 79 and a second working connection 66. In the housing 51 there is a bore with an approximately axially central region of enlarged diameter designed as a piston guide 77 and axial side regions of smaller diameter designed as piston shaft guides 59, 81.

Zwei axial einander gegenüberstehende Schaltkolben 55, 80 bzw. 57, 65 sind mit Kolbenköpfen 55 bzw. 57 in der Kolbenführung 77 und mit Kolbenschäften 80 bzw. 65 in den Kolbenschaftführungen 81 bzw. 59 axial verschiebbar abgedichtet geführt. Zwischen den einander zugewandten Stirnseiten der Kolbenköpfe 55,57 ist eine zweite Stellkammer 56 eingeschlossen, während zwischen den voneinander abgewandten Rückseiten der Kolbenköpfe 55 bzw. 57 und einer jeweils zugeordneten Stufenfläche am Übergang von der Kolbenführung 77 zu der jeweiligen Kolbenschaftführung 59 bzw. 81 erste Stellkammern 67 bzw. 78 eingeschlossen sind. Die Kolbenschäfte 65 bzw. 80 weisen je einen verjüngten Bereich auf, welcher mit der jeweils zugeordneten Kolbenschaftführung 59 bzw. 81 jeweils eine Verbindungskammer 58 bzw. 53 bildet. Jeder Schaltkolben 55, 80 bzw. 57, 65 ist in eine erste Schaltstellung verschiebbar, in welcher die Rückseite seines Kolbenkopfes 55 bzw. 57 an der zugeordneten Stufenfläche zwischen Kolbenführung 77 und Kolbenschaftführung 81 bzw. 59 anliegt, und in eine zweite Schaltstellung verschiebbar, in welcher die Stirnfläche seines Kolbenkopfes 55 bzw. 57 an der Stirnfläche des Kolbenkopfes 55 bzw. 57 des anderen Schaltkolbens 55, 80 bzw. 57, 65 anliegt.Two axially opposed switching pistons 55, 80 and 57, 65 are guided with piston heads 55 and 57 in the piston guide 77 and with piston shafts 80 and 65 in the piston shaft guides 81 and 59 so that they are axially displaceably sealed. A second actuating chamber 56 is enclosed between the mutually facing end faces of the piston heads 55, 57, while first actuating chambers are included between the rear sides of the piston heads 55 and 57 facing away from each other and a respectively assigned step surface at the transition from the piston guide 77 to the respective piston skirt guide 59 or 81 67 and 78 are included. The piston shafts 65 and 80 each have a tapered area, which forms a connecting chamber 58 and 53 with the respectively assigned piston shaft guide 59 and 81, respectively. Each switching piston 55, 80 or 57, 65 is displaceable into a first switching position, in which the rear of its piston head 55 or 57 rests on the associated step surface between piston guide 77 and piston skirt guide 81 or 59, and displaceable into a second switching position, in which abuts the end face of its piston head 55 or 57 on the end face of the piston head 55 or 57 of the other switching piston 55, 80 or 57, 65.

Der Versorgungsanschluss 52 steht über einen Versorgungskanal 60 innerhalb oder ausserhalb des Gehäuses 51 mit den Kolbenschaftführungen 59 bzw. 81 und jeweils über einen Einlasssitz 61 bzw. 68 bzw. 82, mit drei Einlasskammern 64 bzw. 76 bzw. 83 in Verbindung, von denen die erste Einlasskammer 83 mit der ersten Stellkammer 78 des ersten Schaltkolbens 55, 80, die zweite Einlasskammer 64 mit der ersten Stellkammer 67 des zweiten Schaltkolbens 57, 65 und die dritte Einlasskammer 76 mit der zweiten Stellkammer 56, jeweils über einen Gehäusekanal, verbunden sind.The supply connection 52 is located via a supply channel 60 inside or outside the housing 51 with the piston skirt guides 59 or 81 and in each case via an inlet seat 61 or 68 or 82, with three inlet chambers 64 or 76 or 83 in connection, of which the first inlet chamber 83 with the first actuating chamber 78 of the first switching piston 55, 80, the second Inlet chamber 64 are connected to the first actuating chamber 67 of the second switching piston 57, 65 and the third inlet chamber 76 to the second actuating chamber 56, each via a housing channel.

Im wesentlichen koaxial zu den Einlassitzen 61 bzw. 68 bzw. 82 sind an dem Gehäuse 51 drei Stellmagnete 62 bzw. 70 bzw. 50 in nicht näher dargestellter Weise befestigt. Hinsichtlich des Aufbaus und der Funktion der Stellmagnete gilt das nachstehend für den Stellmagneten 70 Gesagte für die anderen Stellmagnete 50 bzw. 62 entsprechend.Essentially coaxial to the inlet seats 61 and 68 and 82, three actuating magnets 62 and 70 and 50 are fastened to the housing 51 in a manner not shown in any more detail. With regard to the structure and function of the actuating magnets, what has been said below for the actuating magnet 70 applies correspondingly to the other actuating magnets 50 and 62, respectively.

Der Stellmagnet 70 weist ein Stellglied 71 auf, welches bei nicht aktiviertem, durch seine Wicklung 69 symbolisierten Magneten durch wenigstens eine Feder 75 gegen den Einlassitz 68 vorgespannt ist. Das Stellglied 71 bildet dadurch mit dem Einlasssitz 68 ein Einlassventil 68, 71. Das Stellglied 71 ist an seiner dem Einlasssitz 68 abgewandten Stirnfläche als Schliessfläche 72 ausgebildet, welche mit einem am Magnetgehäuse ausgebildeten Auslasssitz 74 ein Auslassventil 72, 74 bildet. Das Auslassventil 72, 74 ist bei nicht aktiviertem Magneten geöffnet. Der Innenraum des Magnetgehäuses ist als Fortsetzung der Einlasskammer 76 ausgebildet. Dadurch steht bei nicht aktiviertem Magneten, d.h. bei geöffnetem Auslassventil 72, 74, die Einlasskammer 76 mit einem Leitungsanschluss 73 in Verbindung. Bei aktiviertem Magneten, d.h. bei geschlossenem Auslassventil 72, 74 und geöffnetem Einlassventil 68, 71, ist die Einlasskammer 76 einerseits mit dem Versorgungsanschluss 52 und andererseits über einen Gehäusekanal mit der zweiten Stellkammer 56 verbunden.The actuating magnet 70 has an actuator 71 which, when the magnet is not activated and symbolized by its winding 69, is biased against the inlet seat 68 by at least one spring 75. The actuator 71 thus forms an inlet valve 68, 71 with the inlet seat 68. The actuator 71 is formed on its end face facing away from the inlet seat 68 as a closing surface 72, which forms an outlet valve 72, 74 with an outlet seat 74 formed on the magnet housing. The outlet valve 72, 74 is open when the magnet is not activated. The interior of the magnet housing is designed as a continuation of the inlet chamber 76. This means that when the magnet is not activated, i.e. When the outlet valve 72, 74 is open, the inlet chamber 76 is connected to a line connection 73. When the magnet is activated, i.e. When the outlet valve 72, 74 is closed and the inlet valve 68, 71 is open, the inlet chamber 76 is connected on the one hand to the supply connection 52 and on the other hand via a housing channel to the second actuating chamber 56.

Wie oben ausgeführt, sind die Stellmagneten 50 bzw. 62 in Aufbau und Funktion dem Stellmagneten 70 gleich, wobei die jeweils zugeordneten Einlasskammern 83 bzw. 64 bei aktiviertem Magneten mit der jeweils zugeordneten ersten Stellkammer 78 bzw. 67 und bei nicht aktiviertem Magneten mit Entlüftungsöffnungen 84 bzw. 63 in dem jeweiligen Magnetgehäuse verbunden sind.As stated above, the actuating magnets 50 and 62 are identical in construction and function to the actuating magnet 70, the respectively assigned inlet chambers 83 and 64 having the respectively assigned first actuating chamber 78 and 67 when the magnet is activated and with ventilation openings 84 when the magnet is not activated or 63 are connected in the respective magnet housing.

Der erste Arbeitsanschluss 79 steht mit der Kolbenschaftführung 81 des ersten Schaltkolbens 55, 80, der zweite Arbeitsanschluss 66 mit der Kolbenschaftführung 59 des zweiten Schaltkolbens 57, 65 in Verbindung. Der Entlüftungsanschluss 54 steht über ein entsprechendes Kanalsystem im oder am Gehäuse 51 mit beiden Kolbenschaftführungen 80 bzw. 59 sowie mit Kammern in Verbindung, welche zwischen den Rückseiten der Kolbenschäfte 65 bzw. 80 und den Kolbenschaftführungen 59 bzw. 81 gebildet werden.The first working connection 79 is connected to the piston shaft guide 81 of the first switching piston 55, 80, the second working connection 66 is connected to the piston shaft guide 59 of the second switching piston 57, 65. The vent connection 54 is connected via a corresponding channel system in or on the housing 51 to both piston skirt guides 80 and 59 and to chambers which are formed between the rear sides of the piston skirt 65 and 80 and the piston skirt guides 59 and 81.

In der Fig. 2 ist der erste Schaltkolben 55, 80 in seiner ersten, durch I angedeuteten Schaltstellung dargestellt. In dieser Schaltstellung nimmt die erste Verbindungskammer 53 eine Stellung ein, in der sie den Versorgungsanschluss 52 mit dem ersten Arbeitsanschluss 79 verbindet.2 shows the first switching piston 55, 80 in its first switching position, indicated by I. In this switching position, the first connection chamber 53 assumes a position in which it connects the supply connection 52 to the first working connection 79.

Der zweite Schaltkolben 57, 65 ist in der Fig. 2 in seiner zweiten, durch 11 angedeuteten Schaltstellung dargestellt. Die zweite Verbindungskammer 58 nimmt in dieser zweiten Schaltstellung eine solche Lage ein, dass sie den zweiten Arbeitsanschluss 66 mit der Entlüftung 54 verbindet.The second switching piston 57, 65 is shown in FIG. 2 in its second switching position, indicated by 11. In this second switching position, the second connecting chamber 58 is in such a position that it connects the second working connection 66 to the vent 54.

Bei Aktivierung des Magneten 50 wird die erste Stellkammer 78 des ersten Schaltkolbens 55, 80 druckbeaufschlagt. Der erste Schaltkolben 55, 80 wird dadurch nach rechts in seine zweite Schaltstellung gestellt. Dabei nimmt der erste Schattkolben 55, 80 den zweiten Schaltkolben 57, 65 über die Wirkverbindung zwischen den Stirnflächen der Kolbenköpfe 55 bzw. 57 mit.When the magnet 50 is activated, the first actuating chamber 78 of the first switching piston 55, 80 is pressurized. The first switching piston 55, 80 is thereby placed to the right in its second switching position. The first shading piston 55, 80 takes the second switching piston 57, 65 with it via the operative connection between the end faces of the piston heads 55 and 57, respectively.

Nach Beendigung der Aktivierung des Magneten 50 wird dessen Stellglied von der zugehörigen Feder gegen den Einlasssitz 82 zurückgestellt, wodurch die Einlasskammer 83 und die erste Stellkammer 78 entlüftet werden. Nach Aktivierung des Stellmagneten 50 befinden sich also der erste Schaltkolben 55, 80 in seiner zweiten Schaitstellung und der zweite Schaltkolben 57,65 in seiner ersten Schaltstellung. Die Lage der Verbindungskammern 53 bzw. 58 hat sich dadurch derart geändert, dass nunmehr der erste Arbeitsanschluss 79 mit der Entlüftung 54 und der zweite Arbeitsanschluss 66 mit dem Versorgungsanschluss 52 verbunden sind. Wird jetzt der Stellmagnet 62 aktiviert, vollzieht sich die beschriebene Funktion in umgekehrter Richtung.After the activation of the magnet 50 has ended, its actuator is reset by the associated spring against the inlet seat 82, as a result of which the inlet chamber 83 and the first actuating chamber 78 are vented. After activation of the actuating magnet 50, the first switching piston 55, 80 is in its second switching position and the second switching piston 57, 65 in its first switching position. The position of the connecting chambers 53 and 58 has changed in such a way that the first working connection 79 is now connected to the vent 54 and the second working connection 66 is connected to the supply connection 52. If the actuating magnet 62 is now activated, the function described takes place in the opposite direction.

Bei Aktivierung des Stellmagneten 70 wird die zweite Stellkammer 56 mit Druck von dem Versorgungsanschluss 52 beaufschlagt. Dadurch wird der gerade in seiner zweiten Schaltstellung befindliche Schaltkolben 55, 80 bzw. 57, 65 über die Stirnfläche seines Kolbenkopfes 55 bzw. 57 in seine erste Schaltstellung gestellt. Bezogen auf die Darstellung der Fig. 2 bedeutet dies, dass der zweite Schaltkolben 57, 65 in seine erste Schaltstellung gestellt wird. Als Ergebnis einer Aktivierung des Stellmagneten 70 stehen beide Schaltkolben 55, 80 bzw. 57,65 in ihrer ersten Schaltstellung, sind also beide Arbeitsanschlüsse 79 und 66 mit dem Versorgungsanschluss 52 verbunden. In der beschriebenen Weise wird der gerade in seiner zweiten Schaltstellung befindliche Schaltkolben 55, 80 bzw. 57, 65 auch bei Druckbeaufschlagung des Leitungsanschlusses 73 in seine erste Schaltstellung gestellt.When the actuating magnet 70 is activated, the second actuating chamber 56 is pressurized by the supply connection 52. As a result, the switching piston 55, 80 or 57, 65, which is currently in its second switching position, is placed in its first switching position over the end face of its piston head 55 or 57. Based on the illustration in FIG. 2, this means that the second switching piston 57, 65 is placed in its first switching position. As a result of activation of the actuating magnet 70, both switching pistons 55, 80 and 57, 65 are in their first switching position, that is to say both working connections 79 and 66 are connected to the supply connection 52. In the manner described, the switching piston 55, 80 or 57, 65, which is currently in its second switching position, is placed in its first switching position even when the line connection 73 is pressurized.

In dem vorstehend beschriebenen Türventil nach Fig.2 sind eine Ventileinrichtung und eine Notventileinrichtung im Sinne der Erfindung, insbesondere das erste 10 und das zweite 26 und das dritte 3/2-Wegeventil 5 des Ausführungsbeispiels nach Fig. einschliesslich ihrer Stelleinrichtungen 8 bzw. 25 bzw. 6 bzw. 17 bzw. 29 und des Koppelgliedes 18 vereinigt. Bei Verwendung des Türventils nach Fig. 2 in der Türbetätigungsanlage nach Fig. 1 ist sein Versorgungsanschluss 52 mit dem ersten Arbeitsanschluss 33 des Nothahns 3, sein erster Arbeitsanschluss 79 mit der Öffnungsfläche 21, sein zweiter Arbeitsanschluss 66 mit der Schliessfläche 23 und der Leitungsanschluss 73 mit dem zweiten Arbeitsanschluss 35 des Nothahns 3 zu verbinden. Dann entsprechen der erste Schaltkolben 55, 80 in Verbindung mit dem Stellmagneten 50 und der ersten Stellkammer 78 dem ersten 3/2-Wegventil 10 mit seiner zweiten Stelleinrichtung 8, der zweite Schaltkolben 57, 65 in Verbindung mit dem Stellmagneten 62 und der ersten Stellkammer 67 dem zweiten 3/2-Wegeventil 26 mit seiner zweiten Stelleinrichtung 25 und die Wirkverbindung zwischen den Stirnflächen der Kolbenköpfe 55 bzw. 57 dem Koppelglied 18. Desweiteren entspricht in diesem Fall der Stellmagnet 70 dem dritten 3/2-Wegeventil 5 mit seiner Stelleinrichtung 6. Den Stelleinrichtungen 17 bzw. 29 der 3/2-Wegeventile 10 bzw. 26 entspricht die zweite Stellkammer 56 in Verbindung mit den Stirnflächen der Kolbenköpfe 55 bzw. 57 des ersten und des zweiten Schaltkolbens 55, 80 bzw. 57, 65.In the door valve according to FIG. 2 described above, a valve device and an emergency valve device in the sense of the invention, in particular the first 10 and the second 26 and the third 3/2-way valve 5 of the exemplary embodiment according to FIG. Including their actuating devices 8 and 25 and respectively 6 or 17 or 29 and the coupling member 18 united. When using the door valve according to FIG. 2 in the door actuation system according to FIG. 1, its supply connection 52 is with the first working connection 33 of the emergency valve 3, its first working connection 79 with the opening surface 21, its second working connection 66 with the closing surface 23 and the line connection 73 to be connected to the second working connection 35 of the emergency valve 3. The first switching piston 55, 80 in connection with the actuating magnet 50 and the first actuating chamber 78 then correspond to the first 3/2-way valve 10 with its second actuating device 8, the second switching piston 57, 65 in conjunction with the actuating magnet 62 and the first actuating chamber 67 the second 3/2-way valve 26 with its second actuating device 25 and the operative connection between the end faces of the piston heads 55 and 57 the coupling member 18. Furthermore, in this case the actuating magnet 70 corresponds to the third 3/2-way valve 5 with its actuating device 6. The actuating devices 17 and 29 of the 3/2-way valves 10 and 26 correspond to the second actuating chamber 56 in conjunction with the end faces of the piston heads 55 and 57 of the first and second switching pistons 55, 80 and 57, 65.

Aus den vorstehenden Ausführungen ergibt sich, dass das beschriebene Türventil eine sehr vorteilhafte Kombination des ersten und des zweiten 3/2-Wegeventils darstellt, in welche mit einem geringen Aufwand das dritte 3/2-Wegeventil der Türbetätigungsanlage nach Fig. 1 integriert ist. Damit ist das beschriebene Türventil auch eine sehr vorteilhafte Zusammenfassung der erfindungsgemässen Ventileinrichtung und Notsteuereinrichtung.It follows from the above statements that the door valve described represents a very advantageous combination of the first and the second 3/2-way valve, in which the third 3/2-way valve of the door actuation system according to FIG. 1 is integrated with little effort. The door valve described is thus also a very advantageous summary of the valve device and emergency control device according to the invention.

Claims (22)

1. Door-actuating arrangement, especially for doors in vehicles for conveying passengers, with a pressure medium-operated door drive means (22,24) having the following features:
(a) The door drive means (22, 24) has at least one actuating piston (22) having at least one active surface in the opening direction (opening surface) (21) and at least one active surface in the closing direction (closing surface) (23) of the door;
(b) a valve device (10, 26) controlling the pressure supply to the active surfaces (21 and 23) is provided which, for each active surface (21 or 23), has a blockable connecting path to its supply side;
(c) at least one setting device (17 or 29) actuated by means of a pressure medium is associated with each connecting path and controls the passage thereof;
(d) the door-actuating arrangement has a first emergency switch-off device (9,14) and/or a second emergency switch-off device (3,10, 26) with an emergency stopcock (3) controlling the connection between the supply side of the valve device (10, 26) and a pressure source (1);
(e) the first emergency switch-off device (9,14) contains a device (14) for monitoring the door resistance and emits an emergency signal when a door resistance of a predetermined magnitude occurs;
(f) on actuation of the emergency stopcock (3) of the second emergency switch-off device (3, 10, 26) the connection between the pressure source (1) and the supply side of the valve device (10, 26) is interrupted; characterised by the features:
(g) the valve device (10, 26) is so constructed that when pressure is supplied simultaneously to its setting devices (17, 29) both of its connecting paths are open;
(h) the valve device (10, 26) has associated with it an emergency valve device (third 3/2-way valve 5) which can be controlled by means of the emergency signal;
(i) the emergency valve device (third 3/2-way valve 5)
i a) is connected at a first inlet (30) with the supply side of the valve device (10, 26) and at its outlet to the setting devices (17, 29) thereof, and is so constructed that on receiving the emergency signal it connects its outlet with its first inlet (30) and/or
i b) has a second inlet (32) which is connected to the emergency stopcock (3) and which it connects with its outlet when there is no emergency signal present.
2. Door-actuating arrangement according to Claim 1, characterised in that the door-actuating arrangement has an operating switching device, . on the actuation of which the valve device (10, 26) is so set that the opening surface (21) and the closing surface (23) of the actuating piston (22) are supplied with pressure alternately.
3. Door-actuating arrangement according to one of the preceding Claims, characterised by the features:
(a) the device (14), associated with the first emergency switch-off device, to monitor the door resistance, monitors the door resistance in the opening direction (opening resistance);
(b) the door-actuating arrangement has a reversing device by way of which the valve device (10, 26) is so set that the door reverses from a closing movement into an opening movement when the door resistance in the closing direction (closing resistance), monitored by way of a monitoring device (13), reaches a predetermined value.
4. Door-actuating arrangement according to one of the preceding Claims, characterised by the following features:
a) the valve device (10, 26) has a first 3/2-way valve (10) associated with the opening surface (21) and a second 3/2-way valve (26) which is associated with the closing surface (23), in the first switching position of which the respective associated active surface (21 or 23) can be supplied with pressure and in the second switching position of which the respective associated active surface (21 or 23) is relieved from pressure;
b) the 3/2-way valves (10 and 26) in each case have, in addition to the setting device (17 or 29) actuated by means of the pressure medium, a second setting device (8 or 25);
c) when one 3/2-way valve (10 or 26) is switched over by means of its second setting device (8 or 25) from its first switching position into its second switching position, the 3/2-way valves (10 and 26) are in operative connection by way of a coupling link (18) in such a way that at the same time the other 3/2-way valve (10 or 26) is moved from its second switching position to its first switching position;
d) by way of the setting device (17 or 29), the 3/2-way valves (10 and 26) can be switched independently of the second setting device (8 or 25) from their second switching position to their first switching position;
e) the emergency stopcock (3) has a normal switching position (34) in which the inlets of the 3/2-way valves (10 and 26) are connected to the pressure source (1), and an emergency switch-off position (2) in which the inlets of the 3/2-way valves (10 and 26) are relieved from pressure;
f) as the emergency valve device a third 3/2-way valve (5) is provided which has a basic position (31) and a switch-over position (4) into which it can be switched by actuation of its setting device (6);
g) the third 3/2-way valve (5) is so arranged that in its basic position (31) it relieves the setting devices (17 and 29) of the first and second 3/2-way valve (10 and 26) of pressure by way of the emergency stopcock (3) in the normal switching position (34) of the latter and in the emergency switching position (2) thereof supplies them with pressure;
h) the third 3/2-way valve (5) is so arranged that in its switch-over position (4) it supplies pressure to the setting devices (17 and 29) of the first and second 3/2-way valve (10 and 26) by way of the emergency stodcock (3) in the normal switching position (34) of the latter;
i) the setting device (6) of the third 3/2-way valve (5) is in operative connection with the first emergency switch-off device in such a way that on actuation thereof it switches the third 3/2-way valve (5) from its basic position (31) into its switch-over position (4).
5. Door-actuating arrangement according to Claim 4, characterised in that the second setting device (8 or 25) of the first and second 3/2-way valve (10 or 26) is in each case in the form of a pressure medium actuating device with magnetic pilot valve.
6. Door-actuating arrangement according to one of Claims 4 or 5, characterised in that the basic position (31) of the third 3/2-way valve (5) is set by means of a spring bias.
7. Door-actuating arrangement according to one of Claims 4 to 6, characterised in that the setting device (6) of the third 3/2-way valve (5) is in the form of an operating magnet (6).
8. Door-actuating arrangement according to Claim 7, characterised in that the first emergency switch-off device has an electrical or electronic automatic emergency switch-off system which actuates the operating magnets (6) of the third 3/2-way valve (5) when the predetermined value of the door resistance is reached.
9. Door-actuating arrangement according to one of the preceding Claims, characterised in that the second emergency swich-off device (3, 10, 26) can be actuated at will.
10. Door-actuating arrangement according to one of Claims 4 to 9, characterised by the following features: the reversing device is so constructed that when the predetermined value of the closing resistance is reached it switches the second 3/2-way valve (26) by way of the second setting device (25) thereof into its second switching position (27) and thereby switches the first 3/2-way valve (10) into its first switching position (10) by way of the coupling link (18).
11. Door-actuating arrangement according to one of Claims 4to 10, characterised by the following features: the operating switching device has an electrical or electronic evaluation and switching device (9) which on actuation of an electrical switch (7) actuates the magnetic pilot valve of the second setting device (8 or 25) of the 3/2-way valve (10 or 26) which is then in its first switching position.
12. Door-actuating arrangement according to one of the preceding Claims, characterised in that the emergency stopcock (3) is in the form of a 4/2-way valve.
13. Door-actuating arrangement according to Claim 12, characterised in that the 4/2-way valve can be hand- or foot-operated or electrically or electronically operated by means of pressure medium.
14. Door-actuating arrangement according to one of Claims 11 to 13, characterised by the following features: the electrical or electronic evaluating and switching device (9) is so constructed that it contains the reversing device and/or the automatic emergency swith-off system and, in accordance with signals from the monitoring devices (14 and 13) for the opening and/or closing resistance of the door, controls the actuation of the magnetic pilot valve of the second setting device of the second 3/2-way valve (26) and/or the actuation of the operating magnet of the third 3/2-way valve (5) accordingly.
15. Door-actuating arrangement according to one of Claims 3 to 14, characterised in that the monitoring devices (14 and 13) for the opening resistance and the closing resistance of the door are in the form of a differential pressure switch, which responds to a predetermined difference between the pressures acting on the closing surface (23) and the opening surface (21) of the actuating piston (23).
16. Door-actuating arrangement according to one of Claims 1 to 14, characterised in that the monitoring devices for the opening resistance (14) and/or the closing resistance (13) of the door are in the form of sensors for the opening velocity and the closing velocity, respectively, of the door.
17. Door-actuating arrangement according to one of the preceding Claims, characterised by the following features; end switches (12, 15) are provided which are associated with each end position of the door and which, as long as the door is in the respective associated end position, switch off the monitoring devices (14 and 13) for the opening resistance and the closing resistance, respectively, of the door.
18. Door-actuating arrangement according to one of Claims 4 to 17, characterised in that the valve device (10 or 26) and the emergency valve device (third 3/2-way valve 5), as well as the coupling link (18), are combined into a door valve.
19. Door-actuating arrangement according to one of the preceding Claims, characterised in that compressed air serves as the pressure medium and the relief from pressure of the pressure relief connections of the door-actuating arrangement is obtained by venting into the atmosphere.
20. Door-actuating arrangement according to one of the preceding Claims, characterised in that the valve device (10, 26) and the emergency valve device (third 3/2-way valve 5) are combined into a door valve having the following features:
a) a housing (51) equipped with a supply connection (52), a venting means (54) and with two operating connections (66, 79) is provided;
b) the housing (51) has a bore having a region of enlarged diameter which is arranged approximately centrally in an axial direction and is in the form of a piston guide (77), and axial lateral regions in the form of piston rod guides (59 and 81);
c) two switching pistons (55, 80 and 57, 65) situated opposite each other in an axial direction are guided by piston heads (55 and 57) in the piston guide (77) and by piston rods (65 and 80) in the piston rod guides (59 and 81) so that they are sealed and axially movable;
d) between the front faces, facing towards each other, of the piston heads (55 and 57) a second setting chamber (56) is enclosed, while between the rear faces, facing away from each other, of the piston heads (55 and 57) and the respective associated step surface between piston guide (77) and piston rod guide (59 or 81) a first setting chamber (67 or 78) is enclosed in each case;
e) the piston rods (65 and 80) each have a tapered region which, with the respective associated piston rod guide (59 or 81), in each case forms a connecting chamber (58 or 53).
f) each switching piston (55, 80 or 57,65) can be switched into a first switching position, in which the rear side of its piston head bears against the associated step surface between piston guide (77) and piston rod guide (59 or 81 and into a second switching position in which the front face of its piston head (55 or 57) bears against the front face of the piston head (55 or 57) of the other switching piston (55, 80 or 57, 65);
g) the supply connection (52) communicates with the piston rod guides (59 and 81) by way of a supply channel (60) arranged inside or outside the housing (51) and, in each case by way of an inlet seat (61 or 68 or 82), with three inlet chambers (64 or 76 or 83), of which the first inlet chamber (83) is connected with the first setting chamber (78) of the first switching piston (55,80), the second inlet chamber (64) is connected with the first setting chamber (67) of the second switching piston (57, 65), and the third inlet chamber (76) is connected with the second setting chamber (56), in each case by way of a channel in the housing;
i) on the housing (51), three operating magnets (62 and 70 and 50), each having an operating member (71) biased towards one of the inlet seats (61 or 68 or 82) by means of at least one spring (75), are arranged in such a way that each operating member (71) with the respective associated inlet seat (61 or 68 or 82) forms an inlet valve by means of which the respective inlet chamber (64 or 76 or 83) is separated from the supply channel (60) when the magnet is not actuated;
j) the operating members (71) of the operating magnets (62 and 70 and 50) are so constructed that, with a valve seat (74) fixed to the magnet housing, they in each case form an outlet valve (72, 74) which is associated with an inlet chamber (64 or 76 or 83) and by way of which, when the magnet is not actuated, the first or second inlet chamber (83 or 64) is connected to the atmosphere and the third inlet chamber (76) to a pipeline connection (73);
k) the first operating connection (79) and the second operating connection (66) each communicate with a connecting chamber (53 or 58);
I) the venting means (54) communicates by way of a channel system, arranged inside or outside the housing (51), with both piston rod guides (59 and 80) and with housing chambers defined by the rear sides of the piston rods (65 and 80);
m) the first operating connection (79), in the first switching position of the first switching piston (55, 80), is connected by way of the first connecting chamber (53) to the supply connection
(52) and, in the second switching position of the first switching piston (55, 80), is connected by way of the first connecting chamber (53) to the venting means (54);
n) the second operating connection (66), in the first switching position of the second switching piston (57, 65), is connected by way of the second connecting chamber (58) to the supply connection (52) and, in the second switching position of the second switching piston (57,65), is connected by way of the second connecting chamber (58) to the venting means (54);
o) in its second switching position, each switching piston (55, 80 or 57, 65) is movable by supplying air to the associated first switching chamber (78 or 67) on actuation of the associated operating magnet (50 or 62), whereupon it carries along with it, by way of its front face, the respective other switching piston (57, 65 or 55, 80), by way of its front face, from the second switching position into the first switching position thereof;
p) when the second setting chamber (56) is supplied with air on actuation of the associated operating magnet (70), each switching piston (55, 80 or 57, 65) is moved from its second switching position into its first switching position.
21. Door-actuating arrangement according to one of Claims 1 to 18, characterised in that a hydraulic fluid serves as pressure medium and that the pressure medium emerging from the pressure relief apertures of the door-actuating arrangement is led to a collecting tank.
22. Door-actuating arrangement according to one of the preceding Claims, characterised in that in the pressure medium feed line or lines to one or both active surfaces (21 and 23) of the actuating piston (22) a throttle (19 or 20) or throttles (19 or20) are arranged.
EP85104405A 1984-06-02 1985-04-12 Door actuating device Expired - Lifetime EP0163861B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843420631 DE3420631A1 (en) 1984-06-02 1984-06-02 DOOR OPERATING SYSTEM
DE3420631 1984-06-02

Publications (3)

Publication Number Publication Date
EP0163861A2 EP0163861A2 (en) 1985-12-11
EP0163861A3 EP0163861A3 (en) 1986-07-30
EP0163861B1 true EP0163861B1 (en) 1990-01-10

Family

ID=6237493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85104405A Expired - Lifetime EP0163861B1 (en) 1984-06-02 1985-04-12 Door actuating device

Country Status (4)

Country Link
EP (1) EP0163861B1 (en)
DE (2) DE3420631A1 (en)
ES (1) ES8608618A1 (en)
HU (1) HU209981B (en)

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DE19645701A1 (en) * 1996-11-06 1998-05-07 Wabco Gmbh Valve device for a door system which can be actuated by a pressure medium
DE102006035140B3 (en) * 2006-07-29 2007-10-25 Daimlerchrysler Ag Omnibus door pressurizing medium actuating arrangement, has operating circuit switched over device provided with emergency valve and control valve, where pressurization is drained for locking control valve over emergency valve
DE102008011315B4 (en) * 2008-02-27 2012-04-19 Daimler Ag Pneumatic vehicle door control
DE102009034170B4 (en) * 2009-07-22 2017-10-26 Wabco Gmbh Door actuation valve device for a pressure-actuable vehicle door system
DE102009036783B4 (en) 2009-08-08 2017-11-09 Wabco Gmbh Emergency manhole, door operator, vehicle door system, vehicle and method of operating a vehicle door system
DE102011001003B4 (en) 2011-03-01 2014-05-15 Reinhold Schulte Vehicle door control circuit
CN105133988B (en) * 2015-07-31 2017-03-29 兖州煤业股份有限公司 A kind of safety gate emergency operation device
DE102016010481B3 (en) * 2016-08-31 2017-07-13 Aventics Gmbh Pneumatic control

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Also Published As

Publication number Publication date
ES542916A0 (en) 1986-06-16
DE3420631C2 (en) 1989-06-22
HU209981B (en) 1995-01-30
EP0163861A2 (en) 1985-12-11
HUT38408A (en) 1986-05-28
EP0163861A3 (en) 1986-07-30
ES8608618A1 (en) 1986-06-16
DE3420631A1 (en) 1985-12-05
DE3575326D1 (en) 1990-02-15

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