FR2535094A1 - Display device by strip and adhesive tape for such a device. - Google Patents

Abstract

a. Display device by strip. b. The strip B is driven by two motors M1, M2 permanently mechanically coupled to the rollers 1, 2 onto which the ends of the strip B are fixed. c. Advertising.

Description

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  ixs: ttfd ': fichag o ar tape and adhesive tape for a tel dis-

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  The present invention relates to the

  display positive comprising two rollers parallel to which are fixed respectively the ends of a strip, consisting of posters and of longer length: ndek cque the distance between the two rollers, of the electrically powered ends to drive the rollers d . in a direction of rotation, then in the opposite direction, and-a-e -ru- 'l-ece-ric of cormande of the means with motor ^ S) 1 We already knew a display device this type The posters appear successively ,

  gqézérale n 't in front: a window, in an order

  teaw T, then -u-ia_ :; reverse order Commre the radius of the strip i S Rolls up one roll and unrolls on the other x roll varies as the winding progresses, a rn%; ren * "i es different strip lengths The strip

  can tear To remedy this, we have provided

  with nmec N N ues co-multiplied between motor means

't e S rculeaux.

  The invention relates to a display device with a simpler structure and which nevertheless prevents the strip from tearing. According to the invention, the motor means consist of two electric motors, one of which is c O "the anic, 7 uement permanently only at the first roller and, when energized by the control circuit, drives the first roller in a direction of rotation while, when not energized, it is driven by this first roller in the opposite direction of rotation, the other of which is permanently mechanically coupled only to the second roller and, when energized by the control circuit, drives the second roller in the opposite direction of rotation to that in which the first roller is driven, while, when not energized by the control circuit, it is driven by this second roller in the next rotating breast

  which the first roller is driven.

  So if any mechanical clutch is radically removed Each motor drives its roller in one direction while, in the opposite direction, it is no more than a simple driven member which can follow

his roller.

  Preferably, the motors are asynchronous motors with a reduction gear with straight teeth so as to oppose the least inertia possible when they are

driven by their roller.

  To allow time to view the posters, the control circuit includes means for putting

  both motors de-energized for a period of

  Completed According to an improvement, an electrical circuit is provided for tensioning the strip which energizes the two motors at the same time for a short time immediately after the two motors have been switched off The strip, in particular when it extends vertically and rolls up on the lower roller, tends to wrinkle or take up slack. Thanks to this circuit, it can be stretched. In the accompanying drawing, given only as

example

  Figure 1 is a perspective view of the device according to the invention, and Figure 2 is a diagram of the electrical assembly

of the device.

  On a frame 3 are mounted in bearings

  an upper roller 1 and a lower roller 2.

  The axes of rollers 1 and 2 are horizontal and

  parallel Rolls 1 and 2 have the same length.

  Roller 1 is permanently mechanically coupled to an asynchronous motor M 1 by a straight toothed reducer Roller 2 is mechanically coupled in

  permanence to an asynchronous M 2 motor by a

  straight teeth driver In front of rollers 1 and 2, two rollers are fixedly mounted on the frame 3

  4, 5 of return parallel to the rollers 1,2.

  One of the ends of a strip B, consisting of several posters, each at a height substantially equal to the distance separating the two rollers 4, 5 and a width less than or preferably equal to that of the rolls 1,2,4, 5, is fixed to the roll 1, while the other end of the strip B is fixed to the roll 2 By rotating the roll 1 in the direct direction, the strip B is wound on the roll 1 and it is unwound from the roll 2 , band B

  moving between the rollers 1,2 in the upward direction.

  By turning the roll 2 in the opposite direction, we tape the band B on the roll 2 and unroll it

  of the roll 1, the strip B then moving downwards.

  In order to obtain these movements, the Mif M 2 motors are, in the assembly of FIG. 2 produced in the form of a printed circuit, supplied in parallel by the sector via a 13 V inverter whose pallet 6 can pass from a contact 7 o only the motor M 1 is supplied with contact 8 o only the

  motor M 2 is supplied, and a switch C 1.

  Between the switch C 1 and the inverter I 3 is mounted an inverter I 1 whose pallet 9 passes, when it is controlled by a time relay RT 1, from a contact 10 o the motors M 1 and M 2 can be supplied, to a contact 11 interrupting this supply The relay RT 1 is energized by the coincidence of a patch Pl fixed on the strip B and of an inductive detector D 1

fixed mounted on the frame 3.

  The detector Di is also connected by a band B voltage circuit to one or the other of two time relays RT 2 and RT 31 whose delay times are much shorter than that of RT 1 and are different l from one another, via an inverter I 2 * The paddle 12 of the inverter 12 can come, under the control of a bistable relay RB connected to two other inductive detectors D 2, D 3 mounted fixed on the frame and cooperating respectively with two pads P 2, P 3 bonded to the strip B, on the contact 13 supplying the relay RT 2 or on the contact 14 supplying the relay RT 3 The relay RB

-25 also controls the inverter I 3.

  Relays RT 2 and RT 3 control two inverters

  I 4 and I, assigned respectively to M 1 and M 2 and inter-

  placed between them and the inverter I 3, the paddles of which 16 pass from a contact 17, 18 closing the circuit of the inverters I and I 3 on one of the motors to a contact 19, 20 establishing a circuit between the two

  motors M 1, M 2 and detectors D 1, D 3 via the

mediator of the RB relay.

  In the initial position, the strip B is wound on the lower roll 2 and the electrical assembly is in the position illustrated in the

figure 2.

  Upon power up via

  from C 1 the motor M 1 starts operating in

  thus dragging upwards the strip B made up of posters When the pad Pl is located opposite the detector D 1, this causes the connection of the detector D ′ under tension of the relay RT and, by means of the inverter I 2 that of the relay RT 2 The relay PT 1 which is timed for 5 to 20 seconds (depending on the setting) cuts the supply of the motor M 1 by means of the inverter Il, which causes iarrt of the iande B which is often folded or badly stretched The RT relay which is timed

  of O OS is 0.5 second send via

  med your thy inverters 14 and 15 whose paddles, 16 then pass temporarily on the contacts 3 ') i 9, 20 an impulse on the two motors M 1 and M 2 N this uli causes 13 r the fact Aue the motors turn briefly in tens reverse one of l-Lautre, the braking of the poster <-ul find me th this fact tense and centered with pr cisio l, Ua te nporisation of relay RT 1 finished, the pallet 9 returns to 'a position nitia e on the conitvct: 0 the motor M 1 starts to drive the NB -F -ers up until 7 when comes enu -,;: d of tétectlur D 2 another patch P placed on ila band B Relay RB is energized and reverses the inverters 12

  e t Motor M stops, motor MO starts.

  iane B stops winding, on the roll 1 to unwind by winding on the roll 1 and move down, When again the detector D 1 is requested by the pad P 1, the relay RT 1 acts in the same way as above but the inverter I 3 being reversed, it is the engine

  M 2 which is concerned and which stops then, the inverter-

  I 2 having also been inverted, it will be the relay RT 3 which will delay the braking pulse by

  band B which puts it under tension.

  Relays RT 2 and RT 3 being independent, the braking pulse can be adjusted differently when the strip B of posters goes up, and when it goes down. When a pad P 3 carried by the back of the strip arrives opposite the detector D 3, the latter acts in a similar manner to the detector D 1 to again energize the motor M and the i

M 2 motor off.

  It is desirable that the constitution of the strip of posters can be carried out easily and without

  special care, even by an inexperienced person

  sea tée and not knowing in detail the mechanisms used This is why the invention provides a special adhesive tape, intended for use in a display device for winding a tape. According to the invention, the tape comprises a target. detection, in particular a metal patch capable of being detected

  by an inductive proximity sensor.

  Figure 3 illustrates a strip with posters

  are connected end to end by ribbons according to the invention.

  The strip includes three posters 21, 22, 23 linked in pairs at their ends by two ribbons

  24, 25 Each tape 24, 25 is an adhesive tape on the

  which are fixed, in particular by gluing, two identical targets 26, 27 lying in the mediating plane of the ribbon and equidistant from the two ends 28, 29 of the ribbon

7 2535094

  To make the poster strip, the user

  sator joins the ends of two successive posters by sticking them with a ribbon 24 No matter how the ribbon is placed, one of the targets 26 or 27 will be in the correct position and will scroll at

  the desired instant in front of the detector assigned to it.

Claims (4)

RESELL ICAT IONS   1 display device comprising two parallel rollers (1,2) to which are fixed   respectively the ends of a strip (B), con-   consisting of posters and of length greater than the distance between the two rollers (1,2), electric motor means for driving the rollers (1,2) in a direction of rotation, then in the opposite direction, and a circuit electric motor means control, characterized in that the motor means comprise two electric motors (M 1, rm 2) one of which (M 1) is mechanically permanently coupled only to the first roller (1) and, when it is energized by the control circuit (C 1, I 1, I 3, 14), drives the first   roller (1) in one direction of rotation while, -   when it is not energized, it is driven by this first roller (1) in the opposite direction of rotation, and the other (M 2) of which is mechanically permanently coupled only to the second roller (2) and, when it is energized by the control circuit (C 1, I 1, IV, 15), drives the second roller (2) in the opposite direction of rotation to that in which the first roller (1) is driven, while, when it is not energized by the control circuit, it is driven by this second roller (2) in the direction of rotation in which the first roller (1) is driven.   2 Device according to claim 1, in which the control circuit comprises means (D 1, RT 1, II) for de-energizing the two motors for a determined period, character 4 rised by a circuit (D 1, I 2, RT 2, RT 3) to tension the strip (B) which energizes the two motors (M 1, M 2) simultaneously for a short time immediately after the two motors (M 1, M 2) have been switched on off.   3 Device according to claim 1, characterized in that the circuit for tensioning the strip comprises a time relay (RT) connected to the two motors (M 1, M 2) and controlled by a detector (D 1) for stopping the strip (B) on a poster. 4 Device according to claim 3, characterized in that the circuit for tensioning the strip comprises two time relays (RT 2, RT 3) of which   the delay time is different and an in-   erser (I 2>) to put one of the two time relays   porized (RT 2) or the other (RT 3) in the sui van circuit: the direction in which the strip (E) comes from roll up before stopping.   Device according to the claims   t 2,3 Or 4, characterized in that the motors are t asynchronous motors.   6 Adhesive tape, intended for use in a strip display device, characterized   in that it includes a detection target (27).   ? Adhesive tape according to claim 6,   ? 25 characterized in that it comprises two targets for   -ictúions (27,28) -ide-ntiques arranged prospectively to   distance between the two ends (28,29) of the ribbon.   0 adhesive tape according to claim 5 or 6, characterized in that the two targets (27, 28)   are placed in the same mediator plane of the ribbon.   ri Adhesive tape according to one of the claims   cations 6 to 8, characterized in that the target (27) is a metallic tablet. {pages)