Classifications

• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
  • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
  • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
  • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
  • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
  • E06B9/32—Operating, guiding, or securing devices therefor
  • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives

Definitions

• the invention relates to a drive device, in particular for the displacement and turning of the slats of a blind in a running rail, in which the rotational movement of a drive wheel by means of a changeover gear alternately to a reversing drive means causing the turning movement of the slats and a displacement of the slats in the Transport drive means effecting the rail is transferable,
• the change-over gear comprising a drive tube which can be driven in both directions of rotation via the drive wheel and a profiled control shaft which extends coaxially therewith and which can be rotated relative to one another by a certain angle, and wherein the drive tube extends over its circumference Locking elements arranged offset in the longitudinal and circumferential directions are connected in a switching position to a drive for the transport drive means in a switching position, depending on the angular position of the control shaft relative to the drive tube, and to another in a switching position
• Drive for the turning drive means is rotatably connected.
• Such a drive device is known from DE-OS 2 223 610.
• a drive wheel that can be actuated by a cord or chain hoist rotates one that engages with it
• Radially movable locking members are provided in the wall of this drive tube, offset both in the circumferential and in the longitudinal direction from one another, which, depending on the position of a profile shaft which can also be rotated by the drive wheel via a driver device within the drive tube, engage one of two on the Drive tube arranged one behind the other are held toothed sleeves, or can be moved out of the engagement area with the other toothed sleeve.
• About the one of the two Tooth sleeves can be driven a reversing shaft which causes the turning of the lamellae, via the other a transport spindle which brings about the displacement of the lamellae.
• the blind By changing the direction of rotation on the drive wheel, the blind can be opened and closed on the one hand by the longitudinal displacement of the slats and on the other hand by turning or rotating the slats about their longitudinal axis to a fully or partially closed state of the blind less light transmitting, that is to say brought into a fully or only partially closing position.
• a freewheel On the transport spindle there is a freewheel which is delimited in both directions by a rolling element and a stop and which can be rotated loosely on the transport spindle until the end of the freewheel with a second toothed sleeve meshing with the second toothed sleeve driven by the drive tube.
• a non-positive connection between the transport spindle and the toothed sleeve which has been loosely rotating on it until then, so that the transport spindle is now carried along in rotation.
• the profiled shaft within the drive tube and relative to it is pivoted so far by a driver device against the force of the return spring that the toothed sleeve driving the turning shaft is thereby disengaged.
• the transport spindle which is now solely coupled, causes the slats in the running rail to be moved.
• the angle at which the slats are in relation to the running direction always corresponds to one of the end pivot positions of the slats and is determined by the length of the freewheel; it is approximately 150 ° in both directions.
• a braking device which can be adjusted by means of an adjusting screw is also provided on the freewheel shaft, with which the higher torque required for the switching can be increased again.
• the drive wheel can also be driven by an electric motor instead of a cord or chain hoist
• the switch from the drive of the turning shaft to the drive of the transport spindle is purely mechanical. Because of the large torques that occur, individual parts, in particular the limited freewheel in its end positions, are subjected to great stress. The resulting forces and surface pressures can lead to wear and, as a result of manufacturing tolerances, also to jamming.
• the object of the invention is to provide a drive device of the type mentioned, the changeover gear is suitable for an electric motor drive and in which excessive stress on individual parts of the change-over gear and thus their premature wear is avoided ". Less individual parts to be manufactured with high precision and thus the manufacturing costs should be reduced.
• the slats of a blind should be trouble-free, in particular without interlocking with one another and to hinder, moved along the running track for the opening and closing of the blinds and, in addition, in each sliding position of the slats between a fully and only partially closing turning or turning position, they can be rotated continuously in both directions in order to regulate the incidence of light.
• the switching process from turning to moving and vice versa is to be simplified in such a way that it too, and not just the movement itself, can be effected electrically or electronically, so that the device can also be used for the central actuation and control of several blinds individually or he in groups. Trouble-free operation should be guaranteed.
• Control shaft a magnetizable brake disc is rotatably connected, which faces a stationary electromagnet and that when the induction coil of the electromagnet flows through the brake disc is attracted to the electromagnet 25 and so the control shaft is locked against rotation and the drive tube can be rotated relative to the control shaft by an angle corresponding to the two switching positions , while the electromagnet is deenergized, the control shaft together with the brake disc can be rotated together with the drive tube.
• the switching process based on a relative rotation between the drive tube and the control shaft can be carried out by an electrical signal.
• the switching process stresses the mechanical parts to a much lesser extent than in known devices, so that premature wear and malfunctions, for example due to jamming, are avoided.
• the slats of the Blinds can also be rotated about their longitudinal axis in any intermediate sliding position and not only, as is known, when the blind is completely closed, thus regulating the incidence of light.
• the drive device is characterized by a compact, space-saving design, the manufacturing costs are significantly reduced.
• the drive tube and the control shaft together with the brake disc are held in a de-energized induction coil of the electromagnet by the force of a return spring to each other in a middle position corresponding to a switching position of the change-over gear and can be rotated together; the return spring is rotated relative to the control shaft by the angle corresponding to the other switching position.
• the changeover gear of the drive device according to the invention can advantageously be switched in both directions.
• the drive tube and the control shaft can be held to one another in the one switching position in which they can be rotated together when the induction coil of the electromagnet flows through current; when the electromagnet is de-energized, the drive tube can then be activated by a braking force, e.g. a brake spring to be rotated relative to the control shaft by an angle corresponding to the other switching position of the changeover gear.
• a braking force e.g. a brake spring to be rotated relative to the control shaft by an angle corresponding to the other switching position of the changeover gear.
• the excitation current for the electromagnet is preferably switched on and off depending on the angular position of the slats of the blind in relation to the direction of displacement. It is then possible to prevent the slats from getting caught or otherwise obstructing one another by bringing the slats into a specific angular position, preferably 90 °, in the direction of displacement before the displacement.
• the excitation current for the electromagnet can be switched on and off by an electronic circuit depending on the time or on the analog value or on the number of pulses.
• the displacement position of the slats in the running rail and their angular position with respect to the direction of displacement can be determined electronically and, depending on these two positions of the slats, the excitation circuit for the electromagnet can be closed or interrupted.
• the changeover gear can preferably only be held or brought into this switching position when the lamellae have a defined angular position of approximately 90 ° to the direction of displacement in the switching position driving the transport drive means. In this angular position of the slats, they cannot interfere with each other when moving in the running rail, in particular also on a slope.
• the switching position assumed by the change-over gear when the electromagnet is de-energized is the one in which the transport drive means for moving the slats in the running rail - is bar
• the switching position assumed by the changeover gear in the case of a current-carrying induction coil of the electromagnet is the one in which the reversing drive means can be driven for rotating or turning the slats.
• the electronically controlled switching of the change-over gear together with the electromotive drive of the drive device also makes it bus-compatible.
• Several motors, ie several blinds, individually or in groups, can be operated and controlled centrally via a bus system.
• the device is preferably driven with the aid of synchronous motors; they have the advantage that, unlike DC motors, they always run smoothly. This is particularly important for blinds whose slats are guided in a running rail at both ends.
• Such a bilateral guidance can e.g. be of advantage in the case of very long slats and / or heavily winded systems, or may also be required on roof windows or in the case of horizontally arranged slats.
• FIG. 1 shows a longitudinal section through a preferred embodiment of a changeover gear for an invented drive device according to the invention in its one switching position
• FIG. 2 shows a cross section through the change-over gear according to FIG. 1 along the section line II-II in FIG. 1,
• FIG. 3 shows a longitudinal section through the change-over gear according to FIG. 1 in its second switching position
• FIG. 6 shows a cross section through the changeover gear along the section line VI - VI in FIG. 3.
• a drive tube 1 is divided by a gradation into a further section la and a narrower section Ib.
• a drive wheel 2, designed as a toothed sleeve, is pushed onto the further section la of the drive tube 1 and connected to it in a rotationally fixed manner, which meshes with a gear wheel, not shown, which can be driven by an electric motor, preferably a synchronous motor.
• a first 3 and a second toothed sleeve 4 are arranged on the narrower section 1b of the drive tube 1, but are secured against longitudinal displacement.
• two groups of, preferably three, openings 5 and 6 are provided in the wall of the drive tube 1, offset in the circumferential direction and in the longitudinal direction, in which locking members 7 and 8, preferably in the form of rolling elements, are radially displaceable are arranged and can be brought into or out of engagement with driving lugs 9 formed on the inner wall of the respective toothed sleeve 3 and 4.
• locking members 7 and 8 preferably in the form of rolling elements
• the drive tube 1 and the control shaft 10 can be rotated relative to one another.
• the locking members 7 or 8 in the coverage area of one of the two toothed sleeves 3 or 4 are pushed radially outward through the projections 11 of the control shaft 10 and brought into engagement with the driving lugs 9 of the toothed sleeve 3 or 4 in question or held so that a rotationally fixed connection is established (see FIG. 4), while the locking members 8 or 7, offset in the circumferential direction, in the area of coverage of the other toothed sleeve 4 or 3 into the recesses
• a reversing drive means e.g. a reversing shaft
• a transport drive means e.g. a transport spindle that can be driven to move the blind slats.
• a round control disk 13 is arranged in a rotationally fixed manner.
• Two stops 15 and 16 are formed by a circular sector-shaped recess 14 on the circumference of this control disk 13 (see FIGS. 5 and 6).
• an axial extension 17 is formed on the control disk 13 between these two stops 15 and 16.
• a return spring 18, which is loose around the * control shaft 10 and is spirally laid around it one or more times, engages with its two leg ends 19 and 20 crosswise on the one hand on the extension 17 of the control disk 13 and on the other hand on one of the drive tube 1 or a molded part 21 firmly connected to it protruding pin 22.
• control shaft 10 is held in a central position with respect to the drive tube 1, in which, as will be explained further below, the toothed sleeve 3, via which the transport spindle is driven for moving the slats, is preferably always coupled to the drive tube 1 , while the toothed sleeve 4 driving the turning shaft can be loosely rotated relative to the drive tube 1 (see FIG. 1).
• an axial extension 23 can be provided on the control disk 13, which together with the control disk 13 forms a cavity for partially receiving and protecting the return spring 18.
• a brake disk 24 made of magnetizable material is rotatably fixed and an electromagnet 25 is then arranged in a stationary manner, leaving an air gap, in which the control shaft 10 is rotatably mounted and by a Electronics controlled excitable and excitable.
• the control shaft 10 When the induction coil of the electromagnet 25 is de-energized, the control shaft 10 is held in its central position with respect to the drive tube 1 by the return spring 18, ie when the drive tube 1 is driven in one direction by an electric motor via the drive wheel 2, the control shaft 10 together with the control disc 13 and brake disc 24 driven by the force of the return spring 18 in this rotation, and the changeover gear remains in the assumed shift position, in which the transport spindle of the blind is preferably driven via the toothed sleeve 3, which is connected to the drive tube 1 in a rotationally fixed connection (see FIG .l and 5).
• the brake disk 24 is attracted to the electromagnet 25 by the electromagnetic field that is being built up and the control shaft 10 together with the control disk 13 is thus held in its position.
• the drive tube 1, which is now further driven by the drive wheel 2 rotates in relation to the control shaft 10 against the force of the return spring 18 until the pin 22 firmly connected to it strikes one of the two stops 15 or 16 of the control disk 13 (see FIG. 6). .
• the change-over gear assumes its other shift position, in which the projections 11 of the control shaft 10, the locking members 8 in the openings 6 of the drive tube 1 radially outward and in the range of motion of the driving lugs 9 of the toothed sleeve driving the turning shaft 4 move, the latter is therefore coupled to the drive tube 1, and in which the locking members 7 in the circumferentially and longitudinally offset openings 5 of the drive tube 1 can dodge into the recesses 12 of the control shaft 10, so that the toothed sleeve driving the transport spindle 3rd is uncoupled from the drive tube 1 (Fig. 3 and 4).
• the slats are moved when the slats are predefined by the electronics in relation to the direction of displacement, advantageously at an angular position of approximately 90 °. If the slats are always at right angles to the direction of movement when moving, not only can they not hinder each other, there is the additional advantage that they are completely pushed together, i.e. with the blinds fully open on the side, e.g. of a window take up less space than if they were at a different angle, and they can be covered by a relatively narrow screen, which is often desirable for aesthetic reasons.
• the control circuit which controls the excitation circuit of the electromagnet 25, i.e. Opening and closing electronics advantageously both the sliding position and the turning position of the slats by means of suitable measuring probes, e.g. can be determined by a light barrier and / or a Hall element, and the excitation circuit of the electromagnet 25 can be controlled depending on these positions.
• the electromagnet is not energized when the drive device is actuated, since rotation of the slats for the fol-2 shifting the blinds is not required.
• the electromagnet 25 is first excited when the drive device is actuated, and consequently the changeover gear is brought into its position which drives the turning shaft.
• the slats are then rotated about their axis in a time-controlled or analog value-controlled or pulse-controlled manner until either the desired incidence of light through the blind or the angular position of approx. 90 ° to the direction of displacement is reached in order to be able to initiate a new movement. From the duration of the actuation of the drive device by an operator at an actuation switch, the electronics can recognize whether only a turning of the slats to regulate the incidence of light is desired or a turn with subsequent displacement of the slats.
• each of the devices is preferably driven by a synchronous motor. These have the advantage that, unlike DC motors, they always run smoothly. This is particularly important if the slats of the blind are guided and driven in a running rail at both ends. It is readily apparent that with such a blind, trouble-free operation is only possible with drive motors running in exactly the same way on both sides of the slats. Guiding the slats on both sides will be particularly advantageous in the case of relatively long slats or in heavily winded systems; it is even necessary on roof windows or horizontally arranged slats. Reference list

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• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Blinds (AREA)
• Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=7875665

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• 1998
  • 1998-07-29 DE DE19834082A patent/DE19834082C2/de not_active Expired - Fee Related
• 1999
  • 1999-07-21 CA CA002338790A patent/CA2338790C/fr not_active Expired - Fee Related
  • 1999-07-21 EP EP99948684A patent/EP1101010B1/fr not_active Expired - Lifetime
  • 1999-07-21 DE DE59903038T patent/DE59903038D1/de not_active Expired - Lifetime
  • 1999-07-21 US US09/719,121 patent/US6429609B1/en not_active Expired - Fee Related
  • 1999-07-21 AU AU61866/99A patent/AU6186699A/en not_active Abandoned
  • 1999-07-21 ES ES99948684T patent/ES2185401T3/es not_active Expired - Lifetime
  • 1999-07-21 WO PCT/DE1999/002282 patent/WO2000006865A2/fr active IP Right Grant
  • 1999-07-21 AT AT99948684T patent/ATE225899T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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