EP0207362A1 - Dispositif d'actionnement de portes de véhicules opérant par pression et plus particulièrement par pression pneumatique - Google Patents

Dispositif d'actionnement de portes de véhicules opérant par pression et plus particulièrement par pression pneumatique Download PDF

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Publication number
EP0207362A1
EP0207362A1 EP86108275A EP86108275A EP0207362A1 EP 0207362 A1 EP0207362 A1 EP 0207362A1 EP 86108275 A EP86108275 A EP 86108275A EP 86108275 A EP86108275 A EP 86108275A EP 0207362 A1 EP0207362 A1 EP 0207362A1
Authority
EP
European Patent Office
Prior art keywords
pressure
door
valve
control
pulse
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.)
Granted
Application number
EP86108275A
Other languages
German (de)
English (en)
Other versions
EP0207362B1 (fr
Inventor
Lothar Dipl.-Ing. Benkowitz
Jochen Dipl.-Ing. Diesing
Wolfgang Dipl.-Ing. Wagner
Matthias Dipl.-Ing. Fahrnschon
Steffen Schneider
Steffen Straub
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.)
Robert Bosch GmbH
Daimler Benz AG
Original Assignee
Robert Bosch GmbH
Daimler Benz AG
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 Robert Bosch GmbH, Daimler Benz AG filed Critical Robert Bosch GmbH
Priority to AT86108275T priority Critical patent/ATE41966T1/de
Publication of EP0207362A1 publication Critical patent/EP0207362A1/fr
Application granted granted Critical
Publication of EP0207362B1 publication Critical patent/EP0207362B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/50—Power-operated mechanisms for wings using fluid-pressure actuators
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING 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
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/506—Application of doors, windows, wings or fittings thereof for vehicles for buses
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING 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
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Type of wing
    • E05Y2900/531—Doors

Definitions

  • the invention relates to an actuating device for pressure medium-driven, in particular pneumatically driven, doors in vehicles, such as buses and the like, according to the preamble of claim 1.
  • a switching device with throttle and non-return valve is inserted in connection with the emergency tap operation for manual door actuation between the emergency valve in the connecting line between the pressure medium accumulator and the door valve and the door valve switches.
  • both pressure medium chambers of the working cylinder are relieved, i.e. they are vented in the case of pneumatically driven door leaves. If the emergency valve is now switched back, pressure medium flows into the respective pressure medium chamber of the working cylinder connected to the pressure medium accumulator, as in normal operation.
  • the throttled relief of the other pressure medium chamber is missing, because this was previously completely relieved, there is a dangerous beating of the door leaves in the closing or opening direction.
  • the door actuation device according to the invention with the characterizing features of claim 1 has the advantage, in comparison, to fulfill all the required and described measures for personal protection with a relatively low circuit complexity.
  • a single switching valve is required, which according to the embodiment of the invention according to claim 8 can be designed as an inexpensive series 3/2-way solenoid valve.
  • the switching valve switched at the clock frequency is continuously switched into its venting position for a defined period of time by the specification of the pulse duration or pulse width, so that an average pressure which is reduced in comparison with the operating pressure in the pressure medium accumulator is established in the respective pressure medium chamber.
  • With a ratio of pulse duration to pulse duration of 1: 2 the pressure in the pressure medium chamber is reduced to half the operating pressure.
  • An advantageous embodiment of the invention results from claim 2. This measure provides reliable protection against trapping. If a door leaf escapement occurs, the drive pressure for the door leaves is reduced by appropriate dimensioning of the pulse duration of the control pulses in the pulse train, in particular during the opening movement, so that a danger to a trapped person is reliably excluded.
  • An advantageous embodiment of the invention results from claim 3. This measure suddenly reduces and then maintains the drive pressure when a door leaf inhibition occurs suddenly during the drive movement of the door leaves to a safe level for a person.
  • An advantageous embodiment of the invention also results from claim 4, in particular in connection with claim 5.
  • This measure causes a gradual increase in drive pressure during the occurrence of a door leaf escapement, in order on the one hand to prevent a stiff door or the door of a door obstacle that has already been removed to reliably bring the vehicle standing on the mountain into the end position and, on the other hand, not to endanger a person who may still be in the door leaf.
  • An advantageous embodiment of the invention results from claim 7. This measure saves the switching device with throttle and non-return valve which is absolutely necessary in the known door actuation device - in order to prevent a sudden door leaf movement when the emergency valve operation is canceled. With the control pulse sequence generated by the control device after the emergency valve has been reset, the pressure in the pressure medium chamber driving the respective door leaf only increases gradually. Beating the door, which is dangerous to people, is thus also avoided and without additional effort.
  • an advantageous embodiment of the invention also results from claim 10 additional valve for the switching valve is saved and its function is taken over by the door valve, which is usually designed as a pulse-controlled 4/2-way solenoid valve. Since this solenoid valve is switched from one switching position to the other with each control pulse and remains there until a new control pulse occurs, and on the other hand the solenoid valve is used to switch the direction of door movement, the control pulse sequence emitted by the control device when the door leaf is inhibited must be an even number contain control impulses so that the door movement continues in the original direction after the escapement and the movement of the door is not reversed.
  • the overall additional electronic expenditure required for the generation of the control pulses is considerably less expensive than the valve requirement in the known door actuation device for performing the same functions.
  • an only indicated front door leaf 10 and a likewise only indicated rear door leaf 11 of the two-leaf door are each connected to the sliding piston 12 of a double-acting two-chamber working cylinder 14 or 15.
  • the displacement piston 12 or 13 respectively delimits an opening chamber 16 or 18 and a closing chamber 17 or 19 of the working cylinder 14 or 15.
  • the opening chambers 16, 18 are connected via parallel opening lines 20, 21 and the closing chambers 17, 19 via parallel closing lines 22, 23 each with a connection of a door valve 24, which is designed as a pulse-controlled 4/2-way solenoid valve.
  • a throttle point 25-28 is switched on, wherein the throttle points 25, 26 in the opening lines 20, 21 are each connected in parallel with a check valve 29, 30, the blocking direction of which Door valve 24 is directed.
  • the third connection of the door valve 24 represents a relief point 35 as a ventilation outlet, while the fourth connection of the door valve 24 is connected to a pressure medium reservoir 31, with the interposition of a manually and electromagnetically operated emergency or emergency valve 32, a switching device 33 with throttle and Check valve and a switching valve 34, which is designed as a 3/2-way solenoid valve 42 with spring return.
  • a manually and electromagnetically operated emergency or emergency valve 32 a switching device 33 with throttle and Check valve and a switching valve 34, which is designed as a 3/2-way solenoid valve 42 with spring return.
  • the structure and mode of operation of the emergency valve 32 and the switching device 33 are described in detail in DE-OS 31 37 530, so that reference is made to this.
  • solenoid valve 42 Of the three controlled connections of the 3/2-way solenoid valve 42, hereinafter called solenoid valve 42 for short, two are switched into the connecting line 36 between the pressure medium reservoir 31 and the door valve 24, while a third connection is vented and thus forms a further relief point 37.
  • solenoid valve 42 In its uncontrolled (de-energized) basic position, the solenoid valve 42 assumes the position shown in the block diagram in which the connecting line 36 is switched through. In the controlled switching position, the connection connected to the door valve 24 is connected to the further relief point 37 and is thus vented.
  • the control input of the solenoid valve 42 that is to say its field winding, is connected to an electronic control device 40.
  • two outputs 38.39 which are designed here as electrical potentiometers, are connected to the electronic control device 40 with their outputs.
  • potentiometers on the two door leaves 10, 11 it is also possible to arrange so-called limit switches .43, 44 which open in the door leaf end positions and after the door leaves have been moved out gel 1 0 , 11 from these end positions.
  • the door limit switches 43, 44 like the control device 40, are connected to a power supply source which is marked with "+" in FIG.
  • the door limit switches are connected to the control device 40 and render them ineffective when the switch position is open. This means that the control device 40 is ineffective in the door leaf end positions and can only become effective after the door leaves 10, 11 have been moved out of these end positions.
  • the electronic control device 40 generates control pulses of constant frequency with a pulse duration that can be varied over a wide range, also called pulse width.
  • the pulse width is varied according to a flowchart set in the control device 40.
  • the flow chart is started by sensing a door leaf escapement by sensors 38, 39. As soon as a sensor signal is present at the input of the control device 4J, it generates a control pulse sequence at its output connected to the excitation winding of the solenoid valve 42, as is shown in FIG. 2a.
  • the control pulse train has a pulse period ⁇ or a clock frequency 1 / ⁇ . In a first time interval of 5 s, for example, the control pulses have a pulse duration that is equal to the pulse period.
  • the pulse duration of the control pulses is set to a constant value which is dimensioned such that the alternating switching of the solenoid valve 42 occurs in the pressure medium chamber connected to it Medium pressure (air pressure) is reduced compared to the prevailing medium pressure (drive pressure of the door leaf).
  • the pulse duration of the individual control pulses gradually decreases, ie the pulse duration of the following control pulse is reduced by a certain amount compared to the pulse duration of the immediately preceding control pulse.
  • the pulse duration of the individual control pulses is again selected to be equal to the period. The pulse sequence from the second time interval and so on is then repeated in a subsequent time interval.
  • the control device 40 can also be connected to the emergency valve 32 in a manner that senses its manual operation and reset after manual operation. For example, a corresponding sensor signal can be derived from a known electromagnetic lock 46 of the emergency valve 32 after manual operation.
  • the control device 40 is then additionally designed such that when the electromagnetic lock 46 is released and the associated resetting of the emergency valve 32 (after previous manual operation) into its basic position shown in FIG. 1 at the output of the control device 40 connected to the excitation winding of the solenoid valve 42 a control pulse sequence occurs, as shown in Fig. 2b. In this control pulse sequence, the individual control pulses have a pulse duration that is continuously reduced in successive control pulses. With this additional connection of the control device 40 to the emergency valve 32, the switching device 33 in FIG. 1 is omitted.
  • a button 41 is also connected to the input of the electronic control device 40, by means of which a reversal of the door valve 24 and thus a door actuation process, that is to say a door opening or door closing, can be triggered manually.
  • a control pulse generated by the electronic control device 40 then switches the door valve 24 back to the basic position shown in the drawing, in which the opening lines 20, 21 with the relief point 35 and the closing lines 22, 23 are connected to the output of the solenoid valve 45.
  • the full operating pressure of the pressure medium reservoir 31 is thus present via the closing lines 22, 23 and the throttle points 27, 28 in the closing chambers 17, 19 of the working cylinders 14, 15.
  • the displacement pistons 12, 13 are moved to the left in FIG. 1, and the door leaves 10, 11 move again into their closed position shown in FIG. 1.
  • the limit switches 43, 44 open and the control circuit 40 is deactivated.
  • a door leaf inhibition occurs during the door leaf movement in the door opening direction, for example by a person who has got into the path of movement of the door leaves 10, 11, this movement inhibition of the door leaves is sensed by the sensors 38, 39 and reported to the electronic control device 40.
  • a control pulse sequence is applied to the excitation winding of the solenoid valve 42, as is shown in FIG. 2a. With each control pulse and for its pulse duration, the solenoid valve 42 is switched to its other switching position, in which the opening lines 20, 21 are vented via the further relief point 37.
  • the solenoid valve 42 is like by its return spring 1, in which the opening lines 20, 21 - and thus the opening chambers 16, 18 of the working cylinders 14, 15 - are ventilated with compressed air from the pressure medium container 31 under operating pressure.
  • FIG. 3a The pressure curve at the outlet of the switching valve 42 when a door leaf escapement occurs is shown in FIG. 3a.
  • the occurrence of the door leaf escapement is indicated by a black mark in Fig.3a.
  • the solenoid valve 42 is continuously energized in a first time interval of, for example, 5 s after the door leaf inhibition has occurred.
  • the pressure prevailing at the time the door leaf is inhibited at the outlet of the solenoid valve 42 and thus in the opening chambers 16, 18 is quickly reduced to a considerably reduced value by venting via the relief point 37, which value can be set between 2 and 4 bar in the example.
  • This remaining drive pressure of the door leaves is harmless for a person who gets into the leaf movement path.
  • the solenoid valve 42 is energized with control pulses, the pulse duration of which is constant and less than the pulse period.
  • the solenoid valve 42 is alternately switched back and forth by these control pulses, so that a medium pressure is established at the outlet of the solenoid valve 42.
  • the pulse duration of the control pulses is chosen so that the reduced drive pressure reached in the first time interval is retained unchanged in the second time interval.
  • the pulse duration of the control pulses is now increasingly reduced, so that the pressure gradually increases at the outlet of the solenoid valve 42. If the obstacle has not yet been removed in this third time interval, the cycle of the control pulses is repeated in the first three time intervals.
  • the drive pressure drops again to the reduced value and is maintained there for a further period of time.
  • Another black mark indicates that the obstacle has been removed after a total of 40 s.
  • the door leaves 10, 11 move into their end position with the reduced drive pressure.
  • the limit switches 43, 44 are opened again and the control device 40 is switched off.
  • the solenoid valve 42 returns to its basic position shown in FIG. 1 and the pressure in the opening chambers 16, 18 increases to the operating pressure.
  • the door leaves 10, 11 are held in their end position with maximum pressure.
  • the door operating device acts in the same way as described above if a door leaf escapement is sensed during the closing movement of the door leaves 10, 11.
  • the electromagnetic lock 46 is released and the emergency valve 32 is returned to its basic position shown in FIG. 1 by actuating the button 41 after manual operation of the emergency valve 32 reset.
  • the opening or closing chambers 16 - 18 of the working cylinders 14, 15, each pressurized with compressed air were completely vented, so that the door leaves 10, 11 are easily moved by hand could.
  • the emergency valve 32 is switched back, the compressed air now flows into one or the other pressure medium chamber 16 - 18 of the working cylinders 14, 15 as in normal operation. Since the opposing force of the throttled outgoing compressed air is missing in the other pressure medium chamber, this would lead to a sudden door movement, which could trigger accidents and injuries.
  • a sensor signal is applied to the electronic control device 40, as a result of which the control device 40 generates a control pulse sequence for the solenoid valve 42, as shown in FIG. 2b.
  • the solenoid valve 42 is switched alternately by these control pulses, the pulse duration decreasing with each control pulse and thus the duration of the venting of the respective pressure medium chambers 16-18.
  • the pressure at the outlet of the solenoid valve 42 and thus in the respectively connected pressure medium chambers 16-18 is with it 3b shown over time.
  • the drive pressure rises only gradually over a time interval of, for example, 10 s, so that a striking door movement is avoided.
  • the invention is not restricted to the exemplary embodiment described above. So it is e.g. it is also possible to assign the solenoid valve 42 only to the closing lines 22, 23 or opening lines 20, 21, so that the described function of the solenoid valve 42 is limited to the closing or the opening movement of the door leaves 10, 11.
  • the solenoid valve 42 can be saved and the switching valve 34 can be formed by the door valve 24 itself. Since the 4/2-way solenoid valve 24 is pulse controlled, i.e. Switched to one switching position with a control pulse and switched back to the other switching position with the next control pulse, the pulse sequences generated by the electronic control device 40 according to FIGS. 2a and b must have an even number of control pulses. Otherwise, the direction of movement of the door leaves 10, 11 would reverse at the end of the control pulse sequence. When the control device 40 is ineffective, the door valve 24 remains in its respective switching position as usual and is only switched over to switch the door movement via the button 41.

Landscapes

  • Power-Operated Mechanisms For Wings (AREA)
  • Lock And Its Accessories (AREA)
  • Control Of Fluid Pressure (AREA)
EP86108275A 1985-07-05 1986-06-18 Dispositif d'actionnement de portes de véhicules opérant par pression et plus particulièrement par pression pneumatique Expired EP0207362B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86108275T ATE41966T1 (de) 1985-07-05 1986-06-18 Betaetigungsvorrichtung fuer druckmittelgetriebene, insbesondere pneumatisch angetriebene tueren in fahrzeugen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3524060 1985-07-05
DE3524060A DE3524060C1 (de) 1985-07-05 1985-07-05 Betaetigungsvorrichtung fuer druckmittelgetriebene,insbesondere pneumatisch angetriebene,Tueren in Fahrzeugen

Publications (2)

Publication Number Publication Date
EP0207362A1 true EP0207362A1 (fr) 1987-01-07
EP0207362B1 EP0207362B1 (fr) 1989-04-05

Family

ID=6275038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108275A Expired EP0207362B1 (fr) 1985-07-05 1986-06-18 Dispositif d'actionnement de portes de véhicules opérant par pression et plus particulièrement par pression pneumatique

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EP (1) EP0207362B1 (fr)
AT (1) ATE41966T1 (fr)
DE (2) DE3524060C1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2454506A1 (fr) * 1979-04-18 1980-11-14 Ife Gmbh Commande de l'entrainement d'une porte
DE3234615A1 (de) * 1982-09-18 1984-03-22 Robert Bosch Gmbh, 7000 Stuttgart Tuerbetaetigungsvorrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2824510C2 (de) * 1978-06-03 1984-04-26 Vierling, Oskar, Prof. Dr.Phil.Habil., 8553 Ebermannstadt Vorrichtung zum Steuern der Bewegung eines angetriebenen Tores
DE3137530C2 (de) * 1981-09-22 1986-02-06 Robert Bosch Gmbh, 7000 Stuttgart Türbetätigungseinrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2454506A1 (fr) * 1979-04-18 1980-11-14 Ife Gmbh Commande de l'entrainement d'une porte
DE3234615A1 (de) * 1982-09-18 1984-03-22 Robert Bosch Gmbh, 7000 Stuttgart Tuerbetaetigungsvorrichtung

Also Published As

Publication number Publication date
DE3662709D1 (en) 1989-05-11
EP0207362B1 (fr) 1989-04-05
DE3524060C1 (de) 1987-02-05
ATE41966T1 (de) 1989-04-15

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