WO2000074024A1

WO2000074024A1 - Solution of the drive for the three-plane advertisement billboard elements

Info

Publication number: WO2000074024A1
Application number: PCT/PL2000/000038
Authority: WO
Inventors: Andrzej SZYMYSŁ; Zdziłsaw KŁAPKOWSKI
Original assignee: Szymysl Andrzej; Klapkowski Zdzilsaw
Priority date: 1999-05-31
Filing date: 2000-05-24
Publication date: 2000-12-07
Also published as: AU4629300A

Abstract

The solution of the drive for the billboard elements having the form of vertical prisms with equilateral triangle section that successively present their walls of which the consists the image, lies in the application, for rotation of each of them, of a set of control plates with a peg and a triangle cam with cut-outs, mounted on the prism axis. The cam is mounted inside the control plate, tangent to its inside edge. The plate performs slow rotational movement and the peg mounted on its edge gets into the cut-outs in the cam edges, rotating it successively by 120°. Simultaneously during the plate rotation, its folded edge 'slides' on the convex cam edge, stabilising its position at the time of presentation of the prism wall. All the plates that co-operate with the cams have common drive or are jointed with cogbelts, V-belts or a chain in order to ensure their simultaneous rotation. Through repositioning of the successive plates by a small angle it is possible to delay the reciprocal cam rotation, which allows for 'waving' change of the image on the advertisement billboard.

Description

Solution of the drive for the three-plane advertisement billboard elements

PATENT SPECIFICATION

The subject of the invention is the solution 43f he mov ble elements of 4he hree-plane advertisement billboard (so called 'triform' or 'tri vision billboard'). The active surface of the billboard consists of rotational panels (prisms) with equilateral triangle section, with the walls presented successively. There is a known drive solution, i.e. causing the rotation in cycles by 120° in the specified time sequence, that lies in that the axes of the particular prisms are equipped with bevel racks co-operating with similar racks mounted within adequate distances in the axis going perpendicularly to the axes of prisms under the billboard framing, driven with electric motor with gear, actuated by electronic system for the time essential for making a rotation. There is also used a modification of this solution that lies in twisting of the axes with mounted sectors of bevel racks that co-operate with the bevel racks mounted at the ends of the axes of particular prisms. This modification allows for delaying the moment of rotation of the successive prisms and obtaining the effect of 'waving' change of the image, also called 'domino effect', attractive for an advertising client. There is also a known solution that lies in that the electric motor rotates only the extreme prism, which is jointed with the other ones by means of V-belts^ cogbelts or chain (chains). Sometimes - in small billboards - there isa solution used that lies in driving the prisms with a horizontal roll with furrowed cam canals guiding the pegs mounted in the edges of the prisms in a suitable manner.

The mentioned solutions are characterised with considerable complexity of construction, not too precise blocking of prism in the presentation phase (immovable) and the possibility for obtaining the 'waving' change of the image -a 'domino effect^' - only ΌΆ the fiat surfaces.

The principle of operation of the prism drive, according to the patent, is shown on the Fig. 1. The solution, according to the patent, is distinguished by the fact that the drive for each prism is made of a set, consisting of drive plate (1) with a peg (2) cooperating with a triangle cam (3) fixed mounted at the end of the prism axis in such way that the sides of the equilateral triangle - that could be circumscribed on the cam - are parallel to the sides of the triangle being the section of the prism. The "0" phase shows the moment of beginning the cam rotation around its axis, when the peg (2 that goes around the centre of the drive plate (1) meets the cut-out in the cam edge. The "1/2" phase shows the moment when the peg in its movement caused the rotation of the cam by 60° around its axis by getting inside the cut-out, and the edge of the earn passes the centre of a 'gate' in the wall of the drive plate. The "3/4" phase shows the moment when the peg has already rotated the cam by 90° and it is in the course of getting out of the cut-out in the cam. The "1/1" phase shows the moment of finishing the rotation of the cam by 120° when the peg is outside the cam and the position of the cam has been stabilised by the wall of the drive plate (4).

The proportion of the time and the angles of the active way of the peg (2) (during which the peg co-operates with the cam (3) forcing its rotation) to the free way (when the peg is outside the cam) is matched in a way that the motor that drives the plate could work without stoppages. It allows for simplifying the drive due to the elimination of electronic controlling of stoppages and re-actuation of the motor. Then it is only possible to change the image by simultaneous rotation by 120° of all the prisms. In the case of the 'waving' change of the image - in order to obtain the 'domino effect' - the reciprocal shifting (rotation) of the successive controlling plates of the particular prisms by small angle is necessary in order to obtain delay in the beginning of the movement by the next prisms in relation to the previous ones. This allows for delaying the rotation phase of the next controlling plate and to obtain in such way any sequences of the change of the image on the billboard in the waving manner, i.e. in the way that in the phase of the movement (rotation)only some prisms are in motion (e.g. N of 50) at the same time, the prisms being shifted reciprocally by the angle of β = 120°/N, and creating a 'wave'. In this way the previous image rolls up before the 'wave' and the next one unrolls after the 'wave'. In the case when shifting of the two controlling plates of the prisms by the 'α^' angle is done from the central prism (or from two central prisms) in both sides with opposite directions, the 'wave' will propagate from the middle of the image towards its edges.

All the controlling plates are equipped with racks and are jointed reciprocally by a common drive - a cogbelt cogbelts in pairs (A-B, B-C, C-D, ...) or set of bevel racks on the common axis, co-operating with proper racks on the drive plates. Alternatively - instead of cogbelts - chains, V-belts, toothed bar with reciprocating motion- or intermediate racks can be used. The drive is obtained from the electric motor with rotation reduction gear.

Solution of the drive for the elements of the advertisement billboards according to the invention allows for increasing of the perception and effectiveness of the advertisement due to the attractive sequence of the sign ('domino effect'), and furthermore it allows for using it both on flat surfaces as well as on convex, concave and cvlindrical surfaces.

Claims

PATENT CLAIMThe drive for the three-plane advertisement billboard elements, characteristic by :

1. The basic drive elements, mounted in the upper (or lower) frame of a billboard are:

a/ drive plates in the shape of pan with edges perpendicular to the bottom, bearing seated on the vertical mandrels mounted fixed in the billboard frame, equipped with one peg co-operating with the drive cam of the panel, mounted fixed in-the bottom of the drive plate from its external side near the edge that is with a gap in this place, making a gate that allows for free travelling of the cam edge during its rotation, and furthermore it is equipped with gear wheels enabling the rotation of the drive plates by means of electric motor.

b/ the drive cams of the panels in the form of triangles with sides rounded by a radius close to the inside radius of the edge of the drive plate pan (decreased by necessary clearance) and equipped with cut-outs^ in the edges, the cut-outs being of the dimensions allowing for inserting the peg. in order to perform the cam rotation by 120°. Those cams are mounted on the mandrels bearing seated in the billboard frame, designed for rotating the panels (prisms), and those mandrels are situated in a way so that the rotation of the cam by 120° takes place inside the drive plate pan near the cut-out (gate) in its edge in a way so that the cam edges guiding the peg during the cam rotation get into that cut-out.

2. Curvatures of the cam sides, made with the radius smaller than the radius of the inside edges of the drive plate, during the rotation of the drive plate at the time when the peg in the plate is outside the cut-out in the cam, slide on the inside side of the plate edge with adequate clearance, making at that time the substantial change of the cam position impossible, which stabilises the prism's surface exposed in that cycle.

3. The peg during the time of orbiting around the circumference of the control plate by 360° (in relation to the axis of rotation) co-operates with the cut-outs in the cam during covering the 'β' angle, dependant on the proportion of the dimensions of the cam and the plate, and during covering of the remaining part of the plate circumference (angle of γ = 360 - β angle) the peg moves freely outside the-cam.