EP1553545A1 - Rollanzeigevorrichtung und Verfahren zum Verschieben des Bildinhalts - Google Patents

Rollanzeigevorrichtung und Verfahren zum Verschieben des Bildinhalts Download PDF

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Publication number
EP1553545A1
EP1553545A1 EP04075004A EP04075004A EP1553545A1 EP 1553545 A1 EP1553545 A1 EP 1553545A1 EP 04075004 A EP04075004 A EP 04075004A EP 04075004 A EP04075004 A EP 04075004A EP 1553545 A1 EP1553545 A1 EP 1553545A1
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EP
European Patent Office
Prior art keywords
frequency
drum
motor
motor drum
rotation
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.)
Withdrawn
Application number
EP04075004A
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English (en)
French (fr)
Inventor
Stéphane Bitetta
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Projet Plan
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Projet Plan
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Publication date
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Priority to EP04075004A priority Critical patent/EP1553545A1/de
Publication of EP1553545A1 publication Critical patent/EP1553545A1/de
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F11/00—Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position
    • G09F11/24—Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position the advertising or display material forming part of a moving band, e.g. in the form of perforations, prints, or transparencies
    • G09F11/29—Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position the advertising or display material forming part of a moving band, e.g. in the form of perforations, prints, or transparencies of a band other than endless
    • G09F11/295—Electric control therefor

Definitions

  • the present invention relates to the dissemination of information by through automatic display devices, and more particularly a scrolling display device.
  • the invention also relates to a method scrolling posters
  • a display device to horizontally scrolling tape including two tape rollers driven each by an electric motor external to the roller.
  • one of the electric motors acts as engine winding device for rotating the strip-carrying roller on which the wrapping the tape and the other motor acts as unwinding motor for allow rotation of the tape roll from which the tape is unwound.
  • a brake, associated with each electric motor is actuated during the steps of non-power supply of said motor.
  • the main purpose of this scheme is to maintain a virtually constant tension of the poster support band.
  • a disadvantage of this type of devices is that the scroll time between two posters is relatively important, and all the more so as the length posters on the scrolling tape are long.
  • the devices of the prior art are very little adapted to receive weights of posters that vary. So these devices can difficult to roll up and unfold advertising posters made up of dense materials such as tarpaulin or the like.
  • the present invention therefore aims to overcome one or more of disadvantages of the prior art by defining a method of scrolling of posters adapted to different grammages of poster and decreasing the duration of transition between two successive posters.
  • the rotation of the second drum drum is accelerated after said first delay, via said control means which feed with a frequency higher than said second frequency the second motor drum, when said direction of primary rotation is the same as said secondary direction of rotation.
  • a deceleration order is also given to said second motor drum by the control means in response to said information when said primary direction of rotation is the same as said secondary rotation direction, the feed frequency of the second motor drum being lowered to a value slightly greater than that of said low frequency.
  • said second frequency of the order of 30 to 100 Hz, is delivered to the first motor drum by via a vector converter or converter frequency with automatic torque amplification.
  • the brakes of said first and second motor drums are initially unpowered current two brakes being fed at the end of said first period.
  • the power supply of the brakes said first and second drive drums are cut a few tenths of second after the end of deceleration of the first motor drum.
  • the first motor drum coupled to an automatic torque amplification frequency converter, is powered at the same time as the second motor drum, with initially a frequency substantially equal to that supplied to said second drum engine.
  • the first motor drum coupled to a vector frequency converter, is blocked at the end of the said deceleration by a DC injection triggered automatically by said vector converter.
  • Another object of the invention is to provide an answer to one or more problems encountered in the prior art by defining a device drop-down display specially adapted for implementing the method according to the invention.
  • a parallel train gearbox is positioned inside at least one of said driving drums.
  • said second means of tripping are connected to the frequency converter coupled to said first motor drum and said primary sense is a changing sense identical to the meaning scrolling of the posters, said primary sense being established by means of determination of the scrolling direction of the posters.
  • sensor means of a information representative of the progress of the poster during winding are connected to said electronic central unit to send it a signal initiator of a deceleration order, this order causing a lowering of frequency and being immediately transmitted by said central electronic unit to least to the frequency converter coupled to said first motor drum, the supply of said first motor drum being performed at the end of lowering frequency with a frequency, called low frequency, of the order of said first frequency.
  • control means are such that said first means of triggering the central unit electronics are activated at the beginning of the scrolling step of said band poster support and, after a first predetermined delay, said second triggering means of the electronic central unit are activated, the supply of at least said second motor drum being cut by the unit central office at the end of a second period following the lowering low frequency of the first drum motor.
  • the electronic central unit comprises third means for triggering an order for supplying said second motor drum with a third frequency greater than said second frequency and accelerate the rotation of said second motor drum, said third triggering means being activated in same time as said second means of triggering by the means when said primary direction of rotation is the same as said secondary rotation direction.
  • the electronic central unit also transmits said deceleration order to said second motor drum when said primary direction of rotation is the same as said direction of rotation secondary, the supply frequency of the second motor drum being lowered to a value greater than that of said low frequency.
  • said central unit electronic control connection means between said means supply and brakes of said first and second drive drums, these means of connection being activated after said first delay, and deactivated a few tenths of a second after lowering the frequency feeding the first motor drum at said low frequency.
  • the frequency converter coupled to said first motor drum comprises compensating means automatic torque control for regulating the tension of said support band of posters depending on the load supported.
  • said sustained frequency is delivered to the first drum motor via a converter of vector frequency or a frequency converter with amplification of automatic torque.
  • the first motor drum coupled to a vector frequency converter, is blocked by an injection direct current triggered automatically by said converter vector after lowering its power frequency to said frequency low.
  • the first motor drum coupled to an automatic torque amplification frequency converter, is fed at the same time as the second motor drum, with a frequency substantially equal to that provided to said second motor drum.
  • the converters of coupled frequency audits first and second motor drums are both frequency converters with automatic torque amplification, said primary sense being opposite to said secondary direction, said second means of activating trigger, using said means for determining the direction of scrolling posters, feeding at said second frequency only for the motor drum that wraps the poster.
  • the first and second motor drums are arranged horizontally, the asynchronous motors said first and second drive drums being coupled to a gear reducer parallel train and each mounted inside the associated drum, said first motor drum being positioned substantially at the top in the frame and said second motor drum being placed substantially downward in said frame.
  • said second frequency is determined so that the time between the expiry of the first deadline and the time where the frequency delivered by said frequency converter coupled to the first drum drum is lowered to said low frequency, corresponding to the time scrolling of a poster, between 2 and 2.9 seconds.
  • said second frequency is between 30 and 100 Hz and said low frequency does not exceed 12 Hz.
  • the brakes are magnet-free polarity and are operated, via said central unit electronically, only when the frequency supplying the said first and second engine drums is stable.
  • the apparatus comprises a frame (3), a first roller tape holder called first drum motor (1) and a second tape roll called the second motor drum. These two driving drums (1, 2), parallel, are rotatably mounted on the frame (3) and each comprise an engine three-phase asynchronous electric motor (6) coupled to a parallel train gearbox.
  • the apparatus also comprises feeding means (30) connected to a source of electrical energy supplying electricity, in particular to different motorization elements.
  • a poster support tape (5) or similar is constantly stretched at its ends between said first motor drum (1) and said second motor drum (2).
  • the first and second drive drums (1, 2) are each coupled to a frequency converter (21, 22) each associated with a brake (7). They are each equipped with rotational drive members (no represented) managed by control means. These control means are connected to said power supply means (30) and comprise a unit electronic control unit (4) connected to the frequency converters (21, 22) said first and second drive drums (1, 2). This central unit electronics (4) makes it possible to ensure, via these converters (21, 22), a supply at a variable frequency (N1, N2) and thus generate in at least one direction a rotation at greater or lesser speed of the first and second driving drums (1, 2).
  • connection means (41, 42) between said means of supply (30) and the brakes (7) of said first and second driving drums (1, 2).
  • connection means (41, 42) can also be ordered by the electronic central unit (4) to establish the supply of said first and second driving drums (1, 2).
  • the first and second drive drums are arranged horizontally in the frame (3).
  • the spacing between said first and second drive drums (1, 2) corresponds to a non-zero distance determined according to the size of the posters to be exposed. This distance is generally greater than 2 m, the displayed area being for example of the order of 8 m 2 , the displayed surface can be much higher when used in environments requiring a very high visibility.
  • said first motor drum (1) is positioned substantially upwardly in the frame (3) and said second motor drum (2) is placed substantially downwardly in said frame (3).
  • the posters, scrolling in the direction of their height, are visible from outside the frame (3), through a window or a transparent face of the frame (3).
  • the display apparatus drop down includes only the first and second drive drums (1, 2).
  • these driving drums (1, 2) can be each consisting of an outer aluminum tube (10) enclosing an engine three-phase asynchronous motor (6) coupled to a reducing fitting (60).
  • An extremity aluminum tube may comprise a free flange in rotation (102), the other end comprising a flange fixed in rotation (101), integral with the frame (3), with ends of radial or axial supply cables.
  • each motor drum (1, 2) comprises a coupling flange and of connectors (600) and a coupling device for absorption of shocks (100).
  • the driving drums (1, 2) are preferably chuck and the so-called integrated brakes (7), which are static, are incorporated in the engine (6).
  • These integrated brakes (7) can be free magnet. Without power, such brakes (7) lack of current, are active and create a braking friction or a rotation lock. An injection of current in these brakes (7), even weak, is enough to make them inactive and allow the rotation of the drums (1, 2). A slight friction is sufficient for the poster support band (5) to slide on the engine drums (1, 2) and is well tensioned.
  • one of the frequency converters (21, 22) associated with first and second audits motor drums (1, 2) is a vector frequency converter (21).
  • This vector frequency converter (21) is for example coupled to said first motor drum (1) which is placed horizontally at the top of the frame (3), according to the embodiment presented in Figure 1.
  • the other converter (22), associated with the second motor drum (2), can be a converter of standard frequency.
  • said first motor drum (1) is winder and unwinder and the second motor drum (2) is at least retractor.
  • the rise cycle and the descent cycle of a displays are different but have similar points.
  • said second motor drum (2) is powered with a first frequency called light frequency (N2) determined through the control means of the display apparatus drop.
  • the electronic central unit (4) comprises, for example, first means of triggering a command to feed this second motor drum (2) with said slight frequency (N2) and cause it to rotate exclusively in a so-called secondary sense (12).
  • Said secondary meaning (12) corresponds to the winding of the poster support band (5) around said second motor drum (2). This means that during climbing and down the poster, the second motor drum (2) still remains winder.
  • the power supply of the second motor drum (2) can be performed, as illustrated in FIG. 1, using connection means (42) controlled by the electronic central unit (4).
  • Said slight frequency (N2) can be entered as a parameter in a memory of the electronic central unit (4) so that the standard frequency converter (22) coupled to said second drum motor (2) delivers this slight frequency (N2).
  • the other motor drum (1) is not supplied with electricity but its motor (6) can receive a DC injection.
  • the brakes (7) of the two engines (6) are not still supplied with electricity at the beginning of (a) the process of poster scrolling.
  • the brakes (7) of the two motor drums (1, 2) are supplied with electric current and said first motor drum (1) is powered (b). ) with a second frequency called sustained frequency (N1) determined via the control means of the scrolling display apparatus.
  • This sustained frequency (N1) is greater than said slight frequency (N2).
  • the electronic central unit (4) comprises, for example, second means for triggering a command for supplying this first motor drum (1) with said sustained frequency (N1).
  • Said first motor drum (1), coupled to the vector converter (21), is thus accelerated in rotation in a so-called primary direction (11) of rotation.
  • the rotation speed (V1) of the first motor drum (1) reaches a maximum speed (V M ) which is a function of the said sustained frequency (N1) delivered by the vector converter (21).
  • Said primary direction (12) is for example conditioned by a poster scrolling program installed in a memory of the electronic central unit (4). This means, when the first motor drum (1) is placed horizontally and above as shown in Figure 1, that the first motor drum (1) is winding when a poster and unwind cycle occurs when s performs a poster run cycle.
  • the Poster Scroll program is used to determine whether to mount the displayed poster or to lower it.
  • the triggering of the supply of the first motor drum (1) is for example carried out by means of connection means (41) controlled by the electronic central unit (4).
  • the second drum motor (2) remains at the slight frequency administered at the beginning (a) throughout the process.
  • Representative information of the advance of the poster during winding reaches said central unit electronics (4) which sends a deceleration command in response to said first motor drum (1) until reaching (c) a so-called low frequency (N0).
  • This said low frequency (N0) is of the order of said slight frequency (N2), by lower example of 1 to 4 Hz to it.
  • the electronic central unit (4) can receive this information via a sensor (not shown) for detecting the position of the poster support strip (5) for order the deceleration order.
  • This information may appear on the poster support strip (5) in the form of, for example, a glued reflector (R) at the junction between two posters and the sensor may be an optical cell, photoelectric. It is possible to envisage cells for the detection of signs end of the band (5), causing reversal of the direction of travel. other means of determining the direction of scrolling posters are usable in the invention.
  • a poster scrolling program, modifiable can for example be installed in a memory of the electronic central unit (4).
  • the vector converter (21) automatically triggers a DC injection, so that block the first motor drum (1).
  • This has the effect of stabilizing the advertising poster, the second motor drum (2) being slid, as illustrated in Figure 4d. It is possible to set the value of the frequency to which automatically triggers the DC injection. We have it rule for example the value of said low frequency (N0). Value and duration of the current injection can be parameterized so as to obtain a good fluidity in the end of the scrolling poster.
  • the electronic central unit (4) sends a command to the connection means (41, 42) for cutting off the power supply brakes (7).
  • the electronic central unit (4) issue a command triggering the power cut (d) of the second motor drum (2).
  • This power failure can be achieved by means of connection means (42) controlled by the electronic central unit (4) and connected to the motor (6) of said second motor drum (2). No action is performed during the exhibition period of the poster, after this period of exhibition, another cycle resumes, either of rise, or of descent.
  • the second drum motor (2) remains at the slight frequency administered at the beginning (a) only for a few tenths of a second.
  • the second drum motor (2) is accelerated at the same time (b) as the first motor drum (1), that is to say after said first short delay after which the brakes (7) are energized.
  • the central electronic unit may comprise third means of triggering a command to power said second drum motor (2) with a third frequency called high frequency (N20) and accelerate the rotating said second motor drum (2). These third means of triggering are activated at the same time as said second means of triggering by the control means during a descent cycle.
  • the standard frequency converter (22) delivers a high frequency (N20) said second motor drum (2).
  • This high frequency (N20) is example substantially greater than said sustained frequency (N1) delivered to the first motor drum (1), for example greater than 1 to 6 Hz.
  • sustained frequency (N1) delivered by the vector converter (21) can be very stay the same for the climb cycle and the descent cycle.
  • this sustained frequency (N1) may be 40 Hz while said slight frequency (N2) given to the second motor drum (2) 7 Hz and that the so-called low frequency (N0) is simply 3 Hz.
  • said low frequency (N0) remains less than 12 Hz.
  • the high frequency (N20) delivered to the second motor drum (2) can then be 45 Hz.
  • said high frequency (N20) of the second motor drum (2) it is possible to modulate said high frequency (N20) of the second motor drum (2), for example by lowering it by 1 or 2 Hz when one or two posters have wrapped around said second drum motor (2), lowering it by 3 or 4 Hz when three or four posters are wrapped around the second motor drum (2), etc.
  • This variation can be particularly necessary when the diameter of this drum (2) changes with the posters that roll up or unfold. This variation avoids overload the motor (6) of the drum (1) at the top.
  • the second drum motor (2) has only a role of reel giving a slight torque of the fact the difference in speed, said high frequency (N20) of this drum (2) being greater than said sustained frequency (N1) given to the first drum motor (1).
  • the central unit electronics (4) sends in response to this information a deceleration order at the first motor drum (1) until reaching (c) said low frequency (N0), for example 3 Hz. It also sends in response to this information a deceleration order at the second motor drum (2) to lower its frequency at a value close to or equal to said slight frequency (N2) administered at the beginning of the cycle, for example 7 Hz.
  • N2 said slight frequency
  • a DC injection is made by the converter vector (21) for blocking the first motor drum (1).
  • the rotation of second motor drum (2) causes sliding and stabilizes the advertising poster.
  • the end of the descent cycle is then identical to that of the rise cycle.
  • the timing of the different actions, shown in Figure 3 is substantially the same between the mounted cycle and the descent cycle.
  • said sustained frequency (N1) for example between 30 and 100 Hz, is determined so that the duration between the moment (b) where is fed the first drum (1) and the moment (c) where the frequency delivered by the vector converter (21) is lowered at said low frequency (N0), corresponding to the scrolling time (Td) of a poster, between 2 and 2.9 seconds.
  • the frequencies delivered by the converters (21, 22) may be different from those given as an indicative example, these frequencies being in particular determined according to the power absorbed by asynchronous motors (6). It is of course possible to use a vector or torque amplification converter automatic instead of the standard frequency converter that is coupled at the second motor drum (2).
  • the use of at least one vector converter (21) is particularly advantageous for achieving a smooth scrolling of the poster.
  • a converter (21) periodically scrutinizes the behavior of the engine asynchronous (6) to which it is coupled.
  • the vector frequency converter (21) modulates the current so that the delivered frequency is constant during fast scrolling phase of the poster. It includes means of automatic torque compensation, in particular to regulate the voltage of said poster support strip (5) according to representative parameters of the load supported by the two driving drums (1, 2).
  • the converter vector (21) may include measuring devices measuring permanently the magnetic flux of the engine (6) associated.
  • both frequency converters (21, 22) associated with first and second audits motor drums (1, 2) are amplification frequency converters automatic torque, also called automatic boost.
  • the scrolling display apparatus can be identical to that described in the first embodiment of the invention.
  • both motor drums (1, 2) are winders.
  • the rise cycle and the cycle of descent of a poster differ in that the drum motor that is accelerated is not the same on the ascent or descent.
  • the two driving drums (1, 2) are fed with a slight frequency and turn in opposite directions.
  • the unit electronic control unit (4) comprises, for example, first means of triggering a command for feeding these driving drums (1, 2) with said slight frequency (N2) and cause their rotation exclusively in their winding direction.
  • the brakes (7) of the two engines (6) are not still supplied with electricity at the beginning (a ') of the process of poster scrolling.
  • the course of the process has similarities with the rise cycle of the above-mentioned first embodiment.
  • the brakes (7) of the two motor drums (1, 2) are supplied with electric current and the motor drum which winds the poster is fed (b ') with a sustained frequency (N1) determined via the control means of the scrolling display apparatus.
  • N1 a sustained frequency determined via the control means of the scrolling display apparatus.
  • the electronic central unit (4) comprises, for example, second means for triggering a command for powering the first motor drum (1) which winds the poster with said sustained frequency (N1).
  • the other motor drum (2) remains powered at said slight frequency (N2) during the rise of the poster, as shown in Figure 7b.
  • the speed of rotation (V1 ') of the drum (1) which winds up the poster (1) reaches a maximum speed (V M ') which is a function of the said sustained frequency (N1) delivered by the converter associated automatic boost frequency (21).
  • V M ' a maximum speed
  • N1 sustained frequency
  • the central electronic unit (4) sends in response an order to the converter (21) associated with the motor (6) rotating at said maximum speed (V M ') to decelerate to a so-called low frequency (N0). This has the effect of stabilizing the newly exposed advertising poster.
  • the two motor drums (1, 2) are slipping and the poster is therefore stretched.
  • the unit electronic control unit (4) sends a command to the connection means (41, 42) to cut off the brake power supply (7). Then after a second short delay, a few tenths of a second later, the electronic central unit (4) delivers a command triggering the power cutoff (of) of the two drums motors (1, 2). This power failure is achieved using the said connection means (41, 42) controlled by the electronic central unit (4) and connected to the motors (6) of the two drums (1, 2).
  • the descent cycle of a poster differs from the climb cycle, illustrated in Figures 7a to 7d, by the selecting the frequency converter (22) associated with the second drum motor (2) for generating an acceleration of the bottom drum (2).
  • said second means for triggering a control of the electronic central unit (4) are configured so that the winding motor drum is selected using means for determining the scrolling direction of the posters.
  • the automatic boost frequency converter includes means of automatic torque compensation to regulate belt tension poster support (5) depending on the load supported by the drum motor associated.
  • said first motor drum (1) can just as easily be positioned differently, for example vertically, in different embodiments of the invention.
  • the brakes are magnet-free polarity and are operated, via said central unit (4), when the frequency feeding said first and second engine drums (1, 2) is stable.
  • One of the advantages of the scrolling display apparatus according to the invention lies both in the speed and smoothness of the transition during the transition from one poster to another.
  • the invention thus gives the possibility of increasing very significantly the number of posters exposed per hour.
  • the apparatus according to the invention is particularly adaptable to posters of different types, with different weights, thanks in particular to the use of high-performance frequency converters with automatic torque compensation for varying the voltage.
  • the invention can be sized for different formats and is particularly well suited to common formats ranging from 8 m 2 to 36 m 2 .
  • Another of the advantages of the display apparatus according to the invention is the quiescent engines (6). This makes it possible not to overheat them and this increases their life.
  • the use of motors (6) with reducer to parallel train makes it possible to generate important torques that allow so necessary to drive tarpaulin or other relatively heavy media.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Displays For Variable Information Using Movable Means (AREA)
EP04075004A 2004-01-08 2004-01-08 Rollanzeigevorrichtung und Verfahren zum Verschieben des Bildinhalts Withdrawn EP1553545A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04075004A EP1553545A1 (de) 2004-01-08 2004-01-08 Rollanzeigevorrichtung und Verfahren zum Verschieben des Bildinhalts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04075004A EP1553545A1 (de) 2004-01-08 2004-01-08 Rollanzeigevorrichtung und Verfahren zum Verschieben des Bildinhalts

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EP1553545A1 true EP1553545A1 (de) 2005-07-13

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535094A1 (fr) * 1982-10-26 1984-04-27 World Acrilux Dispositif d'affichage par bande et ruban adhesif pour un tel dispositif
FR2696034A1 (fr) * 1992-09-24 1994-03-25 Decaux Jc Procédé et appareillage de visualisation sélective d'un message inscrit sur une bande support de messages.
EP1093107A1 (de) * 1999-10-14 2001-04-18 Mapub, Société Anonyme Abrollbare Anzeigeanordnung
FR2812750A1 (fr) * 2000-08-04 2002-02-08 Decaux S A Panneau d'affichage deroulant
EP1293956A2 (de) * 2001-09-12 2003-03-19 Siemens Aktiengesellschaft Wechselplakatvitrine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535094A1 (fr) * 1982-10-26 1984-04-27 World Acrilux Dispositif d'affichage par bande et ruban adhesif pour un tel dispositif
FR2696034A1 (fr) * 1992-09-24 1994-03-25 Decaux Jc Procédé et appareillage de visualisation sélective d'un message inscrit sur une bande support de messages.
EP1093107A1 (de) * 1999-10-14 2001-04-18 Mapub, Société Anonyme Abrollbare Anzeigeanordnung
FR2812750A1 (fr) * 2000-08-04 2002-02-08 Decaux S A Panneau d'affichage deroulant
EP1293956A2 (de) * 2001-09-12 2003-03-19 Siemens Aktiengesellschaft Wechselplakatvitrine

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