EP2454746B1 - Système d'entraînement pour meuble, à commande par moteur électrique, muni d'un systéme de sécurite fonctionnant dès l'apparition de la première erreur - Google Patents

Système d'entraînement pour meuble, à commande par moteur électrique, muni d'un systéme de sécurite fonctionnant dès l'apparition de la première erreur Download PDF

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Publication number
EP2454746B1
EP2454746B1 EP10734966.4A EP10734966A EP2454746B1 EP 2454746 B1 EP2454746 B1 EP 2454746B1 EP 10734966 A EP10734966 A EP 10734966A EP 2454746 B1 EP2454746 B1 EP 2454746B1
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EP
European Patent Office
Prior art keywords
safety
contact element
main
motor
furniture drive
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.)
Not-in-force
Application number
EP10734966.4A
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German (de)
English (en)
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EP2454746A1 (fr
Inventor
Armin Hille
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.)
Dewertokin GmbH
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Dewertokin GmbH
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Publication date
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Publication of EP2454746A1 publication Critical patent/EP2454746A1/fr
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Publication of EP2454746B1 publication Critical patent/EP2454746B1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C20/00—Head -, foot -, or like rests for beds, sofas or the like
    • A47C20/04—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination
    • A47C20/041—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination by electric motors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/018—Control or drive mechanisms

Definitions

  • the invention relates to a first-fail-safe electromotive furniture drive according to the preamble of claim 1.
  • Such electromotive furniture drives are known in different versions for the adjustment of various furniture. These furniture includes, among other things, reclining and seating furniture, such as beds, slatted frames, TV chairs.
  • electromotive furniture drives in associated furniture, for example in nursing beds and hospital beds used.
  • relevant regulations, standards and laws with regard to safety apply, whereby the so-called first fault safety is of great importance.
  • First-fault safety means that when a first fault, for example a component, occurs, there is no danger for the user and no unwanted and / or unintentional functions and / or unintentional movements of movable furniture elements are produced which create dangers.
  • the publication EP 1 341 201 A2 describes an electromotive adjustment arrangement for furniture with a release relay, via whose contacts a total motor current flows, which is then fed to a further relay arrangement for acting on a drive motor to effect an adjustment function.
  • This release relay is assigned a function monitoring module, which controls the functionality of the release relay.
  • the publication DE 103 41 705 A1 describes an arrangement for operating an electrically adjustable seat and / or deck furniture with a device for supply current release with a relay.
  • the arrangement comprises a switching means for switching a motor and a further switching means for switching the relay for supply current release, wherein the switching means of independent switching contacts, which are simultaneously actuated.
  • an electric motor furniture drive according to the preamble of claim 1 is disclosed, which is controlled by a hand control device.
  • the manual operating device has a triggering element for each direction of movement of the drive to be set, which in each case comprises two contact pairs which are mechanically coupled to one another.
  • the two contact pairs are each connected in series and with a total of two Relay coupled, which serve as switching elements for the motor current.
  • the series connection ensures that a single incorrectly closed contact of the tripping elements does not lead to starting of the motor. In case of unintentional operation of the trigger element, however, there is a movement of the drive.
  • the object of the present invention is therefore to provide an improved first-fail-safe electromotive furniture drive, in which also prevents unintentional actuation of the drive or difficult.
  • the first fail-safe electromotive furniture drive comprises: at least one drive unit having at least one motor; at least one actuating device having at least two actuating units, each having a motor contact element; at least one supply unit; and at least one safety device, wherein the furniture drive comprises at least one safety actuator having at least a first main safety contact element and a second main safety contact element with which it is mechanically coupled, and wherein the switch contacts of the first main safety contact element and the switch contacts of the second main safety contact element as electromechanical contacts for influencing the Condition of the safety device are formed.
  • the electromotive furniture drive is characterized in that the at least one first main safety contact element and the at least one second main safety contact element form a self-holding circuit together with the safety device.
  • the safety control ensures safe switching on and off by deliberately activating more than one push-button / switch.
  • the at least one first main safety contact element and the at least one second main safety contact element together with the safety device form a self-holding circuit, which is thus simple in construction and allows a small number of parts.
  • the actuating device has the safety actuating device.
  • the furniture drive can also be designed with a message device for displaying the function and for displaying the error of the at least two actuator units and the safety device.
  • the at least one first main safety contact element is coupled to the safety device via a control block.
  • a control block has an ON operating state and an OFF operating state.
  • the control block may be switchable to the ON operating state and the OFF operating state by the at least one first main safety contact element.
  • control block can be switched by a time delay block by means of a predeterminable time delay from the ON operating state to the OFF operating state.
  • a self-holding state of the safety device can also be formed by a time delay block with a predeterminable time delay. This enables automatic switching off of the safety device.
  • This self-hold circuit may also be formed by a time delay block with a predeterminable time delay.
  • the time delay block can perform multiple tasks and reduce the number of parts.
  • the at least one safety actuator may comprise at least a third main safety contact element with which it is mechanically coupled, and the switch contacts of the third main safety contact element may be formed as electromechanical contacts for influencing the state of the safety device, wherein the third main safety contact element as a detent switch , Rotary switch or slide switch is formed.
  • the third main safety contact element as a detent switch , Rotary switch or slide switch is formed.
  • FIGS. 1 to 7 electromotive furniture drives shown by way of example are not exemplary embodiments of the present invention.
  • Fig. 1 shows a schematic block diagram of an electromotive furniture drive.
  • the electromotive furniture drive 1 comprises in this example an actuating device 2, a supply unit 3 and a drive unit 4 for adjusting an adjustable part or more of a piece of furniture, not shown.
  • the supply unit 3 here has a voltage source 8, which is for example a transformer and / or an accumulator.
  • the voltage source 8 is with a network connection 5 can be connected to an electrical supply network.
  • the supply unit 3 is here equipped with a safety device 9 for first fault safety of the electromotive furniture drive 1, which will be explained in more detail below.
  • the mains connection 5 can also be attached to the housing of the supply unit 3 as an integrally formed, attached and / or plug-in connector section (eg, as a plug-in power supply).
  • the actuating device 2 is connected via a connecting line 6 to the supply unit 3 via a distributor 18, for example a T-distributor.
  • a distributor 18 and the drive unit 4 is connected via a motor line 7, wherein this is continued here in the actuator 2.
  • the distributor 18 is located on or in the supply unit 3.
  • the connecting line 6 also includes the motor line 7.
  • the distributor 18 may, for example, also be connected to or inserted in the drive unit.
  • the actuating device 2 here has two first actuating units 12 and two second actuating units 13 for actuating in each case a drive unit 4.
  • a drive unit 4 In this example, only one group 12, 13 is used, since only one drive unit 4 is present.
  • more than two drive units 4 can be used, in which case a correspondingly adapted actuator 2 is used and further actuation units 12, 13 has.
  • the furniture drive 1 is designed so that the motor current flowing through the motor line 7 of the drive unit 4 is guided by the supply unit 3 to the actuator 2, where it can be fed by the actuatable actuators 12, 13 in a corresponding polarity to supply the drive unit 8 in the motor line 7 is.
  • This is a so-called directly switched furniture drive 1.
  • the actuating device 2 is provided with a signaling device 10, which serves both to display the function and to display a first error and thus the first error security.
  • the reporting device 10 may be executed optically and / or acoustically. Here it has three optical signaling elements 11, which will be described in more detail below.
  • FIG. 1 A circuit diagram of this first example after Fig. 1 is in Fig. 2 shown.
  • the manifold 18 is not shown, but is easy to imagine.
  • the supply unit 3 here has a transformer 8.1 as a voltage source 8, wherein a primary winding of the transformer 8 via a primary fuse 22, for example, a thermal fuse in the primary winding, is connected to the power connector 5, and wherein a secondary winding of the transformer 8 via a resettable fuse element 21 is connected to a rectifier bridge 19 for the provision of DC voltage.
  • the primary fuse 22 and / or the fuse element 21 can also be assigned in each case additionally a fuse.
  • Primary fuse 22 and / or fuse element 21 can also be only fuses themselves.
  • the rectifier bridge 19 is followed by a smoothing capacitor 20.
  • the negative pole of this DC voltage is connected to a main minus line 6.1 of the connecting line 6.
  • a main positive line 6.2 of the connecting line 6 is connected to a first safety switching contact 15.1 of a safety switching element 15, for example a relay.
  • This first safety switching contact 15.1 is opened when the safety switching element 15 is not energized.
  • a closing contact connection of the first safety switching contact 15.1 leads to a motor plus 6.3, and a control input of the safety switching element 15, here the winding of the relay is connected to a control line 6.4 of the connecting line 6.
  • the safety switching element 15 is connected to the negative pole (main minus line 6.1) of the secondary DC voltage.
  • the safety switching element 15 forms here the safety device 9.
  • the actuating device 2 - also referred to as a so-called manual switch - comprises here the first actuating unit 12 and the second actuating unit 13.
  • the actuating unit 12 is in this example a button with an actuating button, which acts on two contact elements, namely a first motor contact element 12.1 and a first safety contact element 12.2.
  • the first motor contact element 12.1 is a change-over contact and the first safety contact element 12.2 is designed as a make contact.
  • the second actuating unit 13 with a second motor contact element 13.1 (changeover contact) and a second safety contact element 13.2 (NO) built.
  • a respective actuating button not shown
  • the motor contact elements 12.1 and 13.1 and the safety contact elements 12.2 and 13.2 are actuated together.
  • This operability can be designed such that either both contact elements 12.1 / 12.2 and 13.1 / 13.2 can be actuated simultaneously or in succession. In the latter case, first the safety contact element 12.2 / 13.2 is actuated ("leading contact element") and then the motor contact element 12.1 / 13.1. When you release it is the other way round. Both contact elements 12.1 / 12.2 and 13.1 / 13.2 can each have, for example, a common actuating element, for example a plunger. But you can also be operated by a kind of rocker simultaneously or sequentially, with only one keystroke is required. Of course, both contact elements 12.1 / 12.2 and 13.1 / 13.2 also individually actuated, but both must be actuated to effect a movement of the drive unit 4.
  • the contact elements 12.2., 13.2 can also be designed so that they have a switching output, which consists for example of a semiconductor switch or relay switching contact, which is controlled by a certain size, such as a touch switch, proximity switch, touch screen u. like.
  • each changeover contact of the motor contact elements 12.1 / 13.1 is connected in each case with its connection a via the motor line 7 to a motor 4.1 of the drive unit 4.
  • each changeover contact connects the connection a with an opener connection b.
  • each changeover contact connects the connection a with a normally open connection c.
  • the ⁇ ffneran everything b are each connected to the main minus lead 6.1 and the normally open terminals c are each connected to the motor plus 6.3.
  • the safety contact elements 12.2 and 13.2 are each connected to a connection d with the control line 6.4 and are each connected to a terminal e to the main positive line 6.2.
  • the actuating device 2 is equipped with the signaling device 10, which here comprises three indicator lights 11.1, 11.2 and 11.3 in the form of light-emitting diodes (LED) with respective series resistors R1, R2 and R3.
  • the first indicator light 11.1 is here connected via series resistor R1 to the control line 6.4 and the main minus lead 6.1, wherein the cathode of the LED is located on the main minus lead 6.1.
  • the second indicator light 11.2 is connected to the cathode via the series resistor R2 to the main negative lead 6.1 and with its anode to the motor plus 6.3.
  • the third indicator light 11.3 is with its anode on the Series resistor R3 connected to the main positive line 6.2 and with its cathode to the motor positive line 6.3.
  • this first or the second actuating unit 12, 13 is actuated in order to switch the motor 4.1 in a corresponding direction of movement, then the respective safety contact element 12.2, 13.2 switches on the safety switching element 15 whose safety switching contact 15.1 connects the main positive line 6.2 to the motor positive line 6.3.
  • the normally open terminals b of the motor contact elements 12.1, 13.1 are at the potential of the main positive line 6.2, the motor 4.1 is switched on accordingly and the first indicator light 11.1 lights up as long as the respective safety contact element 12.2, 13.2 is actuated. It signals its function. When you release the depressed actuator unit 12, 13, the first indicator light must go out 11.1.
  • Indicator light 11.1 thus serves to display the function and error display of the safety contact elements 12.2, 13.2 and thus contributes to the first error safety.
  • the second indicator light 11.2 lights up. If it does not shine despite actuated safety contact element 12.2, 13.2 and its respective correct function display, so the second indicator light 11.2 signals a first error of the safety switching element 15 and also contributes to Leasedryschreib at.
  • the series resistor R3 of the third indicator light 11.3 is particularly high impedance.
  • the third indicator light 11.3 signals a faulty motor contact element 12.1, 13.1 in the case of lights, for example in the event that the closing contact a / c of a respective changer of a motor contact element 12.1, 13.1 is burned or welded and no longer opens. Then lies in the unactuated state of the actuator 2, the motor plus 6.3 via the faulty closed motor contact element 12.1, 13.1, thus connected via the motor line 7 motor 4.1 and the other motor contact element 12.1, 13.1 on the main minus 6.1 (via the internal resistance of the motor 4.1). In this way, then the third indicator light 11.3 is turned on and thus indicates this first error. The current flowing through the motor is so low that the motor does not start.
  • Fig. 3 illustrates a circuit diagram of a second furniture drive 1, wherein, in contrast to the first example after Fig. 2
  • the safety switching element 15 is arranged in one of the voltage source 8 to the power connection 5 upstream power switching unit 16 and connects the voltage source 8 to the power supply when energizing the safety switching element 15 with a second safety switch contact 15.2.
  • the safety switching contact 15.2 is designed here bipolar.
  • the safety switching element 15 also forms the safety device 9.
  • the network switching unit 16 is also referred to as mains isolation. Since there is no energy for energizing the safety switching element 15 when the mains connection 5 is disconnected from the voltage source 8, an auxiliary voltage source 17 is arranged with an auxiliary voltage transformer 17.1, which is permanently connected to the mains connection 5.
  • the auxiliary voltage source 17 may also be a battery and / or an accumulator.
  • the auxiliary voltage source 17 supplies a DC voltage (here by bridge rectifier and smoothing capacitor) whose negative pole to the safety switching element 15, the cathode of the LED of the second indicator light 11.2, which is arranged here in the network switching unit 16 (but can also be arranged in the actuator 2) , and an auxiliary negative lead 6.5 of the connecting line 6 is connected.
  • the positive pole of the auxiliary voltage source 17 is connected via an auxiliary positive line 6.6 to the main positive line 6.2 of the connecting line 6.
  • the main positive line 6.2 always carries the potential of the auxiliary positive line 6.6.
  • the safety switching element 15 is connected to an exciter connection or control connection to the control line 6.4. A motor plus 6.3 is not present, since the main plus line 6.2 and the main minus 6.1 by the safety switching element 15 are switchable.
  • the actuators 12, 13 of the actuator 2 are constructed as in the first example. Their connections to the connection cable 6 are as follows.
  • the terminals a of the motor contact elements 12.1, 13.1 are connected to the motor line 7 (as in FIG Fig. 2 ).
  • the connections b are likewise located on the main minus lead 6.1, as in the first example.
  • the connections c are connected to the main positive line 6.2.
  • the terminals d of the safety contact elements 12.2, 13.2 are together on the control line 6.4, and the terminals e are connected to the main positive line 6.2 and the auxiliary positive line 6.6.
  • a respective safety contact element 12.2, 13.2 switches through the potential of the auxiliary positive lead 6.6 on the main positive lead 6.2, the safety switching element 15, which connects the voltage source 8 to the power connector 5. Then the main positive line 6.2 leads the potential of the voltage source 8, which is switched by the respective actuated motor contact element 12.1, 12.2 on the motor 4.1 for the movement thereof.
  • the first indicator light 11.1 (indicator light designed as LED) is connected in this second example with the cathode to the main minus lead 6.1 and the anode via the dropping resistor R1 to the main positive lead 6.2. It lights up when the safety switch element 15 is turned on when actuated. If it does not light when actuated, this is a signaling of a first fault of the safety switching element 15.
  • the second indicator light 11.2 also lights up when actuated and indicates a defective safety contact element 12.2, 13.2 when actuated by non-lighting.
  • the third indicator light 11.3 is connected via a diode unit 14, which is connected between the motor lines 7, connected to the anode via a series resistor R4, wherein its cathode is connected to the auxiliary negative lead 6.5.
  • the diode unit 14 has a first diode 14.1 and a second diode 14.2, whose cathodes are connected together, and whose anodes are each connected to a motor line 7.
  • the cathodes are connected to the third indicator light 11.3.
  • the third indicator light 11.3 lights up. If it does not light despite being actuated, it signals a first fault of a motor contact element. If it lights up after releasing an actuating unit 12, 13, it signals, for example, a glued closing contact a / c of a previously actuated motor contact element 12.1, 13.1.
  • Fig. 4 shows a third furniture drive 1, wherein an advantageous simple construction of a first fail-safe furniture drive 1 is provided with direct circuit.
  • the connecting line 6 has only the main minus lead 6.1 and the main positive lead 6.2, which are connected to the voltage source 8 (in FIG Fig. 2 described).
  • the safety device 9 is formed in each case by a safety contact element 12.2, 13.2 of the actuating units 12, 13.
  • the motor current of the motor 4.1 flows through the motor contact elements 12.1, 13.1 and the safety contact elements 12.2, 13.2 are acted upon only with a control current for the safety switching element 15, in the third example, the safety contact elements 12.2, 13.2 acted upon by the motor current, since they are connected in series with the closing contact a / c of the respectively associated motor contact element 12.1, 13.1.
  • the connections a are connected to the main line 6.1 as in the first and second examples with the motor line 7 and the normally closed connections b.
  • the normally open terminals c of the motor contact elements 12.1, 13.1 are respectively connected to the terminals d of the associated safety contact elements 12.2, 13.2 whose normally open terminals e are in turn connected to the main positive line 6.2.
  • the first indicator light 11.1 (LED) lies with its cathode at the anode of a series-connected third diode 14.3 of a diode unit 14, whose cathode is connected both to the terminal d of the first safety contact element 12.2 and to the terminal d of the second safety contact element 13.2 ,
  • the anode of the first indicator light 11.1 is located at half the supply voltage via a high-impedance voltage divider (R5, R6), which is connected between the main minus line 6.1 and the main positive line 6.2.
  • the second indicator light 11.2 (LED) lies with its anode at the cathode of a diode connected in series with the fourth diode 14.3 of the diode unit 14, whose anode is connected both to the terminal d of the first safety contact element 12.2 and to the terminal d of the second safety contact element 13.2 ,
  • the cathode of the first indicator light 11.1 is also at half supply voltage to the high-impedance voltage divider (R5, R6).
  • the second indicator light 11.2 lights to check the function as long as the actuation lasts. If a motor contact element 12.1, 13.1 defective (closer a / c glued, welded or the like), so is after releasing the operation on the internal resistance of the motor 4.1 negative potential at the cathode of the third diode 14.3, whereby the first indicator light 11.1 in this way first fault of a motor contact element 12.1, 13.1 signals. If a safety contact element 12.2, 13.2 (closer d / e glued, welded or the like), so is after releasing the operation positive potential of the main positive line 6.2 on the closed contact on the Anode of the fourth diode 14.4. Then the second indicator light 11.2 lights and signals this first error of a safety contact element 12.2, 13.2 in this way. The current flowing through the motor in this case is so low that a breakaway torque for starting the engine is not generated, and the motor thus does not move.
  • a first fault of the motor contact elements 12.1, 13.1, safety contact elements 12.2, 13.2, safety switching elements 15 and / or safety switch contacts 15.1 does not lead to uncontrolled behavior of the furniture drive and is signaled immediately. This is a first-fail safe electric motor furniture drive 1 created in direct circuit.
  • Fig. 5 a circuit diagram of a fourth example of the furniture drive 1 according to the invention is shown.
  • the safety switching element 15 is similar to the second example Fig. 3 arranged in one of the voltage source 8 to the mains connection 5 upstream power switching unit 16.
  • the auxiliary voltage source 17 is designed, for example, as a battery, rechargeable battery (accumulator) and / or capacitor with a high capacity.
  • a positive pole of the auxiliary voltage source 17 is connected via a first protective diode 23 to the auxiliary positive line 6.6, wherein the negative pole is connected to the main minus line 6.1.
  • the protective diode 23 serves on the one hand as a reverse polarity protection and on the other hand to protect against the voltage which leads the main positive line 6.2, which is generally higher than the auxiliary voltage.
  • auxiliary positive line 6.6 always carries the potential of the auxiliary voltage. If the voltage source 8 is switched on, the auxiliary positive line 6.6 leads to the cathode of the first protective diode 23, the potential of the auxiliary voltage and behind the cathode, the potential of the main positive line 6.2 reduced by the forward voltage of the second protective diode 24th
  • the cathode of the LED of the second indicator light 11.2 is arranged in the power switching unit 16 and connected to the auxiliary negative lead 6.5 and the main negative lead.
  • the safety switching element 15 is connected to the exciter connection or control connection to the control line 6.4 connected. Again, a motor plus 6.3 is not present, since the main plus line 6.2 and the main minus 6.1 by the safety switching element 15 are switchable.
  • the actuator units 12, 13 of the actuator 2 are constructed as in the second example. Their connections to the connection cable 6 are as follows.
  • the terminals a of the motor contact elements 12.1, 13.1 are connected to the motor line 7 (as in FIG Fig. 2 and 3 ).
  • the terminals b are also located on the main minus lead 6.1 as in the first and second examples, and the leads c are connected to the main positive lead 6.2.
  • the terminals d of the safety contact elements 12.2, 13.2 are together on the control line 6.4, wherein the terminals e are connected in contrast to the second example with the auxiliary positive line 6.6.
  • a respective safety contact element 12.2, 13.2 switches on the safety switching element 15 by means of the potential of the auxiliary positive lead 6.6, which connects the voltage source 8 to the mains connection 5.
  • the main positive line 6.2 carries the potential of the voltage source 8, which is switched by the respective actuated motor contact element 12.1, 13.1 to the motor 4.1 for the movement thereof.
  • the potential of the main positive line 6.2 is then applied via the second protective diode 24 to the auxiliary positive line 6.6 and conducted to the safety switching element 15 via the respective closed safety contact element 12.2, 13.2.
  • the first indicator light 11.1 (indicator light designed as LED) is connected in this fourth example with the cathode to the main minus lead 6.1 and the anode via the dropping resistor R1 to the main positive lead 6.2. It lights up when the safety switch element 15 is turned on when actuated. If it does not light when actuated, this is a signaling of a first fault of the safety switching element 15.
  • the second indicator light 11.2 also lights up when actuated and indicates a defective safety contact element 12.2, 13.2 when actuated by non-lighting.
  • Fig. 6 shows a circuit diagram of a first embodiment of the furniture drive according to the invention 1.
  • the actuator 2 at least one safety actuator 25, which is mechanically coupled to at least one first main safety contact element 25.1.
  • the switching contacts of the first main safety contact element 25.1 are designed as electromechanical contacts and influence the state or the activity of the safety device 9 by the safety switching element 15.1 is switched and / or the switch position of the at least one main safety contact element 25.1 is changed.
  • the at least one main fuse contact element 25.1 is designed as a make contact and connected to the main positive line 6.2. Via a control line 6.4, it is connected to a control block 26, which in turn is connected to the safety switching element 15.
  • the control block 26 is here connected to a time delay block 27, which is connected via a signal line 6.8 with the diode unit 14 so that its connection is at the cathode of the first diode 14.1 and the second diode 14.2.
  • the control block 26 also has an auxiliary input 29 for connecting further signal transmitters, for example an overcurrent shutdown of the motor 4.1, which is not shown.
  • the main safety switching element 25.1 is connected here as a so-called start button. This start button is pressed before an operation of the engine 4.1.
  • the control block 26 is switched to an ON operating state and, in turn, switches on the safety switching element 15, for example a relay as in the first example.
  • the safety switching element 15 then connects here the main minus lead 6.1 with an engine minor 6.7. Then can be turned on the actuators 12 and 13 of the engine 4.1 in the desired adjustment.
  • the control block 26 may be provided in a variant not shown with a so-called T-flip-flop, which is turned on by the main safety switching element 25.1 by a first actuation and turned off by a second actuation.
  • the second indicator light 11.2 signals that the motor minus line 6.7 is under voltage. This means when the main safety switching element 25.1 is switched off, that the safety switching element 15 or the control block 26 has an error.
  • the third indicator light 11.3 lights up when the motor 4.1 is running or the motor cable is carrying voltage.
  • the third switch element 15 such an error of the actuator units 12, 13 is signaled by lighting.
  • the time delay block 27 performs a reset of the control block 26.
  • the time delay block 27 has a signal conditioning 28, which already processes the signal of the signal line 6.8 when switching on the motor 4.1 so that when switching on (or off) the motor 4.1, the time delay starts.
  • the fourth indicator light 11.4 here signals the switched-on state of the time delay block 27 and can thus indicate an error of the same by continuous lighting after the end of an operation or non-illumination when the motor 4.1.
  • Fig. 8 shows a first embodiment of a furniture drive according to the invention 1.
  • Both main safety contact elements 25.1 and 25.2 are designed as a pushbutton switch and are connected together with the at least one safety switch contact 15.2 in a self-holding circuit, wherein the first main safety contact element 25.1 activates the self-holding as normally open and start button and the at least one safety switch contact K2 coming from its rest position turns permanently switched to an on state.
  • the first main safety contact element 25.1 connects the main minus lead 6.1 to the relay 15.1, which is located and attracts via a further control line 6.4 'and the closed NC contact of the second main security contact element 25.2 on the main positive line 6.2.
  • the second main safety contact element 25.2 lifts by pressing the latching of the relay 15.1 again and the at least one safety switch contact K2 goes back to its idle state.
  • the time delay block 27 may additionally or solely form a self-holding via a connecting line 31 with the motor minor line 6.7 and via a connecting diode 30, which is connected to the control line 6.4.
  • the safety contact K2 closes, with the time delay 27 applying the potential of the motor common line 6.7 to the control line 6.4 via the connecting line 31, as a result of which the relay 15.1 remains energized.
  • a time delay is initiated, which interrupts this self-hold connection after a predeterminable time, whereby the relay 15.1 drops again.
  • the indicator lights 11.2 and 11.3 are already described above.
  • a second embodiment according to Fig. 9 provides a detent switch as a third main safety contact element 25.3, which is designed for example as a rotary switch or as a slide switch and has latching switching positions.
  • the contacts of the latching switch are connected to the safety switching element 15 or here to the relay 15.1 shown or form the at least one safety switch contact.
  • the detent switch can be operated manually or only with Hinzutun an auxiliary tool, for example in the form of a Codiersteckers or a key in different versions.
  • the indicator light 11.2 lights up when the safety contact K2 is closed, with the motor plus 6.3 being live.
  • the indicator light 11.2 can shine weaker.
  • the safety contact K2 is opened, the indicator light 11.2 goes off.
  • the indicator light 11.3 signals by lighting a fault of an operating unit 12, 13.
  • the safety contact K2 is open, for example, an adhesive Contact of an actuating unit 12, 13 negative potential of the main negative lead 6.1 put over the motor winding of the motor 4.1 to the cathode of the indicator light 11.3 and turn them on, since their cathode via the resistor R3 is at positive potential of the main positive line 6.2.
  • a fourth indicator light can be arranged as a supply voltage indicator in the actuating device 2, which indicates a defective fuse element 21, 22 at mains connection by non-lighting.
  • the indicator lights 11.1 to 11.3 of the annunciator 10 may also be configured as a multi-color LED. It is also possible, for example, to use LEDs with an integrated flashing circuit, whereby the flashing function is used for error representation.
  • the fuse switching element 15 of the first example may be arranged in the actuating device 2, wherein the power supply is, for example, a plug-in power supply.
  • the power supply is, for example, a plug-in power supply.
  • the actuator 2 may also be arranged a so-called overcurrent shutdown for switching off an engine in case of overload.
  • an overcurrent shutdown can also be arranged, for example, in the supply unit 3 and / or at another suitable location in the course of the power lines, which lead the motor current during operation of the motor.
  • the safety contact element 12.2, 13.2 may also be designed as a change-over, whereby it is possible to lock individual drives 4 against each other, if their adjustment functions are a danger at the same time.
  • the actuating device 2 is provided with locking locks or with suitable locking functions, whereby the power supply of the safety contact elements 12.2, 13.2 can be prevented.
  • a lighting of the actuator 2 for example with LEDs, possible.
  • the safety switching element 15 may also be a semiconductor switch instead of a relay.
  • the safety contact element 12.2 / 13.2 as a safety device 9 in the third example may be a combination of a mechanical NO contact for control and a power semiconductor switch for the motor current.
  • the actuator 2 may also be provided with a further voltage source in the form of a battery or a rechargeable battery, whereby a so-called Notabsenkungsfunktion is given.
  • connections for additional lights can be provided for example by means of X-connector in the connecting line 6.
  • a so-called care LED can also be installed in the supply unit 3, whereby a line to the actuator 2 can be saved.
  • This Care LED indicates a fault, for example, when it lights up when you press the control, does not light up, flashes, changes color, and so on. like.
  • the signaling elements 11 of the signaling device 10 are controlled by an evaluation unit.
  • This evaluation unit can, for example, as a diode gate (see diode unit 14), logic gates, controllers u.
  • This evaluation unit can, for example, as a diode gate (see diode unit 14), logic gates, controllers u.
  • diode gate see diode unit 14
  • logic gates like.
  • controllers u Like. Be formed, which evaluates voltage and / or current states of the different lines (with predeterminable setpoints, Sollkonstellationen etc.) compares and as a result, the signaling elements 11 turns on / off, flashing and / or change color.
  • safety contact elements 12.2, 13.2 these have a movable carbon contact, movable metal contact or a movable foil contact, which is mechanically coupled to an actuating unit and is designed to be manually operable.
  • the respective movable contact is in operative connection with a fixed contact, which is inextricably or cohesively in connection as a carbon contact or as a gold-plated contact of a fixed or flexible printed circuit board or film.
  • the safety device 9 or the signaling device 10 described in the introduction is generally considered as part of the furniture drive 1, wherein the safety device 9 and / or the signaling device 10 can be arranged in only one component or separately in different components of the furniture drive 1 in a preferred embodiment.
  • the safety device 9 and / or the reporting device 10 may be integrated in a component of the furniture drive 1, but at least electrically connected to at least one of the components, the components of the furniture drive 1 essentially from the Supply unit 3, the distribution unit 18, the actuator 2 and / or the drive unit 4 is formed or formed.
  • each drive unit 4 may be coupled with an overcurrent shutdown, however, an overcurrent shutdown may also be coupled with a number of drive units 4 or preferably with only one drive unit 4.
  • an overcurrent shutdown has a current measuring point, e.g. in the form of a measuring resistor, with connected threshold value and amplifier and recognizes this excessive current flow and sends an electrical signal to the safety device 9 and / or to the annunciator 10.
  • the annunciator 10 is electrically coupled to the Care LED described above or formed by the Care LED.
  • This controlled breaker contact can be designed as an electromechanical relay contact or as an electronic semiconductor contact, wherein the energy supply to the input or the output of the supply unit 3 or the input of a number, all or each drive unit is transmitted via the contacts or via the semiconductor layers of the controlled breaker contact. If the safety device 9 detects a fault, it controls the controlled breaker contact, whereupon its contacts open or switch off nonconducting and the current flow to the at least one drive unit 4 interrupt or minimize.
  • the controlled breaker contact is designed as a manually controllable breaker contact and is integrated according to further embodiments in the housing of the actuator 2 or in a separate housing, which is connected to a cable of the actuator.
  • the manually controllable breaker contact is designed as a normally closed as a kind of emergency stop switch / button.
  • the controlled breaker contact can be designed as manually reversible, as electrically reversible or irreversible breaker contact.
  • the distribution unit 18 described above is described in an embodiment described above as a T-distributor.
  • This T-distributor has in the simplest form three electrical connections, which can be designed in the form of cable connections and / or plug-in form in the form of plug-in connections.
  • a connection to the supply unit 3, a connection to the actuating device 2 and a connection to the drive unit 4 are electrically connected.
  • the furniture drive 1 can have a plurality of drive units 4 and / or a plurality of supply units 3 and / or a plurality of actuators 2. All drive units 4, supply units 3 and actuators 2 can be electrically interconnected by only one distributor unit 18.
  • a plurality of distributor units 18 are provided which are electrically connected to a number of drive units 4, supply units 3 and actuators 2.
  • the simplest embodiment provides at least one distribution unit 18, which is attached separately or on furniture or on a component of the furniture drive 1 or integrated therein.
  • the at least one distributor unit 18 may be arranged in the supply unit 3, in the voltage source 8, in the actuating device 2 or in the drive unit 4.
  • the safety device 9 and / or the reporting device 10 in the supply unit 3, in the power source 8, in the actuator 2 and / or in the drive unit 1 is arranged or electrically connected thereto.
  • the furniture drive 1 can be provided with a plurality of actuating devices 2 in different embodiments.
  • the actuators 2 may be formed as a hand switch or fixedly attached to the furniture panel or only accessible to the nursing staff switching device. At least one actuating device 2 is available to a person to be cared for or ill, while further actuating devices 2 can only be available to the nursing staff, since they are arranged, for example, spatially separated from other actuating devices 2 on the furniture.
  • a number or all of the actuators 2 may comprise a mechanical and / or an electric lock.
  • Mechanical lock locks are known, which can be electrically switched, for example, by introducing a mechanical key.
  • Electric lock locks are also known which can initiate lock functions via a key combination or by applying, for example, a magnetic key.
  • the supply unit 3 or the voltage source 8 described at the beginning can be designed according to different embodiments as a network-dependent or as a grid-independent supply unit 3.
  • Mains-independent supply units 3 have batteries or accumulators, which may be connected to upstream charging circuits.
  • Mains-dependent supply units 3 have transformers, e.g. with so-called EI core transformers, toroidal transformers or electronic transformers in the form of switching power supplies with a high-frequency transformer on.
  • the supply units 3 can be introduced directly into a socket according to different embodiments, may have a sealed housing in another embodiment and be designed as a base unit for placement on the floor and / or as a built-in device for installation in the furniture.
  • the main safety switching element 25.1 can also be designed as a first fault-proof main switch, wherein the contacts directly switch the main negative lead 6.1 and / or the main positive lead 6.2 or interrupt.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Control Of Electric Motors In General (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Keying Circuit Devices (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Safety Devices In Control Systems (AREA)

Claims (9)

  1. Entraînement de meuble à moteur électrique à sûreté intégrée (1) avec :
    au moins une unité d'entraînement (4) comprenant au moins un moteur (4.1) ;
    au moins un dispositif d'actionnement (2) avec au moins deux unités d'actionnement (12, 13) présentant chacune un élément de contact de moteur (12.1 ; 13.1) ;
    au moins une unité d'alimentation (3) ; et
    au moins un dispositif de sécurité (9),
    dans lequel l'entraînement de meuble (1) présente au moins un dispositif d'actionnement de sécurité (25) qui présente au moins un premier élément de contact de sécurité principal (25.1) et un deuxième élément de contact de sécurité principal (25.2) avec lesquels il est couplé mécaniquement,
    et dans lequel les contacts de commutation du premier élément de contact de sécurité principal (25.1) et les contacts de commutation du deuxième élément de contact de sécurité principal (25.2) sont conformés comme des contacts électromécaniques destinés à influencer l'état du dispositif de sécurité (9),
    caractérisé en ce que l'au moins un premier élément de contact de sécurité principal (25.1) et l'au moins un deuxième élément de contact de sécurité principal (25.2) forment un circuit d'auto-maintien avec le dispositif de sécurité (9).
  2. Entraînement de meuble à moteur électrique à sûreté intégrée (1) selon la revendication 1, caractérisé en ce que l'au moins un dispositif d'actionnement (2) comprend le dispositif d'actionnement de sécurité (25).
  3. Entraînement de meuble à moteur électrique à sûreté intégrée (1) selon la revendication 1 ou 2, caractérisé en ce que l'au moins un premier élément de contact de sécurité principal (25.1) est couplé au dispositif de sécurité (9) par l'intermédiaire d'un bloc de commande (26).
  4. Entraînement de meuble à moteur électrique à sûreté intégrée (1) selon la revendication 3, caractérisé en ce que le bloc de commande (26) comporte un état de fonctionnement en marche et un état de fonctionnement arrêté.
  5. Entraînement de meuble à moteur électrique à sûreté intégrée (1) selon la revendication 4, caractérisé en ce que le bloc de commande (26) peut être commuté par l'au moins un premier élément de contact de sécurité principal (25.1) dans l'état de fonctionnement en marche et l'état de fonctionnement arrêté.
  6. Entraînement de meuble à moteur électrique à sûreté intégrée (1) selon la revendication 3 ou 4, caractérisé en ce que le bloc de commande (26) peut être commuté de l'état de fonctionnement en marche à l'état de fonctionnement arrêté par un bloc de temporisation (27) au moyen d'une temporisation pouvant être prédéterminée.
  7. Entraînement de meuble à moteur électrique à sûreté intégrée (1) selon la revendication 1 ou 2, caractérisé en ce que le circuit d'auto-maintien est formé par un bloc de temporisation (27) ayant une temporisation qui peut être prédéterminée.
  8. Entraînement de meuble à moteur électrique à sûreté intégrée (1) selon la revendication 1 ou 2, caractérisé en ce que l'au moins un dispositif d'actionnement de sécurité (25) présente au moins un troisième élément de contact de sécurité principal (25.3) avec lequel il est couplé mécaniquement, et les contacts de commutation du troisième élément de contact de sécurité principal (25.3) sont conformés comme des contacts électromécaniques destinés à influencer l'état du dispositif de sécurité (9), le troisième élément de contact de sécurité principal (25.3) étant conformé comme un commutateur à encliquetage, un commutateur rotatif ou un commutateur à curseur.
  9. Entraînement de meuble à moteur électrique à sûreté intégrée (1) selon l'une des revendications 1 à 8, caractérisé en ce que l'entraînement de meuble (1) est muni d'un dispositif de signalisation (10) pour l'affichage des fonctions et l'affichage des défauts des au moins deux unités d'actionnement (12, 13) et du dispositif de sécurité (9).
EP10734966.4A 2009-07-14 2010-07-14 Système d'entraînement pour meuble, à commande par moteur électrique, muni d'un systéme de sécurite fonctionnant dès l'apparition de la première erreur Not-in-force EP2454746B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202009005020U DE202009005020U1 (de) 2009-07-14 2009-07-14 Erstfehlersicherer elektromotorischer Möbelantrieb
PCT/EP2010/060143 WO2011006930A1 (fr) 2009-07-14 2010-07-14 Dispositif d'actionnement de meuble à moteur électrique à sécurité intégrée

Publications (2)

Publication Number Publication Date
EP2454746A1 EP2454746A1 (fr) 2012-05-23
EP2454746B1 true EP2454746B1 (fr) 2016-11-02

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EP10734967.2A Not-in-force EP2454747B1 (fr) 2009-07-14 2010-07-14 Système d'entraînement pour meuble, à commande par moteur électrique, muni d'un système de sécurité fonctionnant dès l'apparition de la premiere erreur
EP10734966.4A Not-in-force EP2454746B1 (fr) 2009-07-14 2010-07-14 Système d'entraînement pour meuble, à commande par moteur électrique, muni d'un systéme de sécurite fonctionnant dès l'apparition de la première erreur

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Country Status (8)

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US (2) US9230764B2 (fr)
EP (2) EP2454747B1 (fr)
JP (2) JP5615358B2 (fr)
CN (2) CN102484017B (fr)
AU (2) AU2010272518B2 (fr)
DE (1) DE202009005020U1 (fr)
DK (2) DK2454747T3 (fr)
WO (2) WO2011006930A1 (fr)

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Also Published As

Publication number Publication date
US9230764B2 (en) 2016-01-05
WO2011006931A1 (fr) 2011-01-20
EP2454747A1 (fr) 2012-05-23
JP5615358B2 (ja) 2014-10-29
DK2454747T3 (en) 2018-02-26
JP2012533161A (ja) 2012-12-20
DE202009005020U1 (de) 2010-12-16
AU2010272518B2 (en) 2015-06-11
CN102484017B (zh) 2015-12-02
DK2454746T3 (en) 2017-02-13
WO2011006930A1 (fr) 2011-01-20
US20120206070A1 (en) 2012-08-16
AU2010272518A1 (en) 2012-03-01
AU2010272519B2 (en) 2015-11-19
US20120194106A1 (en) 2012-08-02
CN102498537B (zh) 2014-12-17
JP2012533283A (ja) 2012-12-20
CN102498537A (zh) 2012-06-13
EP2454746A1 (fr) 2012-05-23
US8981679B2 (en) 2015-03-17
CN102484017A (zh) 2012-05-30
EP2454747B1 (fr) 2017-11-29
JP5896899B2 (ja) 2016-03-30
AU2010272519A1 (en) 2012-02-09

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