FR2811461A1 - Oscillating drive for advertising panel has separate cranks so different elements move differently - Google Patents

Abstract

An oscillating drive has frame (4) with bearings for a motor (5) and cradles (2) driven through a shaft (1) and connecting rods (3) or cams with torque limiting coupling and position adjuster.

Description

-1 - The present invention relates to a mechanical device intended for

  simultaneously actuate a variable number on their fixed axes in oscillatory motion

  elements forming as a whole all or part of a sign, a pre-

  sign, form or advertising or information panel.

  The only movements carried out in the sign sector are

  simple rotations or windings of flexible supports.

  The device according to the invention makes it possible to achieve this oscillatory movement offset between the elements. According to a first characteristic, it in fact comprises a crankshaft / balance system allowing the engine shaft (the crankshaft) to give an oscillatory movement to several cradles (the pendulums) by means of connecting rods; the angular offset of the rod ends on the engine axis causes the angular offset of the cradles between them. The cradles serve as support for the elements to be animated, whatever form they are. A fixed part serving as the load-bearing structure of the assembly also receives the bearings of the motor shaft and the axes of the cradles. The motor shaft is driven

  in rotation by at least one motor member (motor-reduction unit for example).

  According to particular embodiments: - The angular offset of the rod ends can be adjustable by splitting the drive shaft into as many rod / crank systems as there are cradles; each

  motor shaft element is connected to the neighboring element (s) by means of

  diary of a coupling for adjusting an angular offset during assembly. In this case, intermediate bearings will be necessary in order to

  maintain sufficient rigidity to the motor shaft.

  - The hooking position of the connecting rod feet on the cradles can be adjustable by varying the distance between "connecting rod end / axis of rotation of the cradle" in order to obtain an adjustment of the angular amplitude of the element oscillatory movement

by element.

  - The crankshaft can be replaced by an eccentric camshaft

  acting on connecting rods, pushers, or directly on the cradles.

  - The fixed part serving as the load-bearing structure of the assembly, can be produced in several parts rigidly linked together, this in order to facilitate manufacture and assembly. Spacers and intermediate shafts can be inserted between these different parts in order to space or increase the

size of the elements.

  -2- - A torque limiting coupling can be fitted between the drive unit and the drive shaft for safety and mechanical protection reasons in the event of

blocking or excessive torque.

  - A device for varying the speed of rotation of the drive member can be installed to vary the oscillation speed of all of the elements. - Power supplies by flexible cable can be provided on the

  cradles to allow the installation of light devices on the elements.

  The accompanying drawings illustrate the invention:

  Figure 1 shows in section, the device of the invention.

  FIG. 2 represents in section, a variant of this device.

  With reference to these drawings, the device comprises a drive shaft (1) which is a crankshaft driven in rotation by a drive member (5). The motor shaft (1) drives, via the connecting rods (3), the cradles (2) in an oscillating movement by pivoting on their axes. The angular offset of the big ends

  (D1) causes an angular offset (D2) between the cradles (2) element support

  is lying. Under the effect of the rotation of the motor shaft (1) the angular offsets (D1 and D2) induce an alternating twist movement, successively in one direction then in the opposite direction, to all the cradles (2) which support

the visual elements to animate.

  Other movements are obtained by varying the angular offsets (D1 and D2). The number of cradles (2) is not limited except by the resistance

mechanical parts.

  The body (4) serves as a support structure for the assembly and receives the bearings of

  the motor shaft (1) and the axes of the cradles (2).

  In the embodiment according to FIG. 2, the motor shaft (1 ') is a shaft with

cam acting on connecting rods.

  The motor shaft (1 ') is made up of several parts connected together by couplings (6) in order to allow, during assembly, an adjustment of the offset

  angle of the rod ends between them.

  To facilitate assembly and assembly, the body (4 ') is composed of

  several parts rigidly linked together. Spacers (7) and inter-shafts

  mediaries (8) can be inserted between these different parts in order to space

  or to increase the size of the elements supported by the cradles (2).

  A torque limiting coupling (7) is mounted as protection between

  The drive member (5) and the drive shaft (1 ').

-3-

Claims (9)

-Revendications-   1) Device for simultaneously actuating in oscillatory movement on their fixed axes a variable number of elements forming as a whole all or   part of a sign, pre-sign, form or public sign   citation or information characterized in that it comprises a motor member (5) driving in rotation a motor shaft (1) which, by means of connecting rods (3) drives cradles (2) in an oscillating movement by pivoting on their axes, and a body (4) serving as a support structure for the assembly and also receiving   the bearings of the motor shaft (1) and the axes of the cradles (2).   2) Device according to claim 1 characterized in that the drive shaft (1)   is made up of several parts linked together by couplings (6).   3) Device according to claim 1 or claim 2 characterized in that   the driving shaft (1) is a camshaft.   4) Device according to any one of the preceding claims, characterized   in that the body (4) is composed of several parts rigidly linked together.   5) Device according to claim 4 characterized in that spacers (7) and intermediate shafts (8) are mounted in order to space or increase the size elements.   6) Device according to any one of the preceding claims, characterized   in that a torque limiting coupling (7) is installed on the drive The motor shaft (1).   7) Device according to any one of the preceding claims, characterized   in that the position of the connecting rod feet (3) is adjustable.   8) Device according to any one of the preceding claims, characterized   in that a speed variator is installed on the motor member (5).   9) Device according to any one of the preceding claims, characterized   in that electrical supplies are installed on the cradles (2).