FR2510978A1 - CONVEYOR PROPELLER FOR OBJECTS SUCH AS SHAPED BOTTLES - Google Patents

Abstract

DUE TO ITS STEP, CONVEYOR PROPELLER 1 GIVES OBJECTS IN THE TRANSFER REGION AN ADVANCE POSSIBLY FOLLOWED BY A DELAY, OR A DELAY FROM POSITIONS 5, OF THE ENTRY STAR 4, SUCH AS THE ANGLES OBJECTS CAN BE TRANSFERRED IN SYNCHRONISM INTO POSITIONS 5, WITHOUT A HURT WITH THE INPUT STAR.

Description

CONVEYOR PROPELLER FOR OBJECTS LIKE BOTTLES

IN SHAPE

  The present invention relates to a trans-

  carrier for objects, such as shaped bottles,

  in the net of which the objects are kept mixed

  canonically by a guide which extends along the length.

  of the propeller, these objects being transported along the propeller by the rotation of the latter, and at the output of the propeller being disposed an input star with positions at its periphery, particularly adapted housings to the shape of objects, in which the propeller

transfers objects.

  Conveyor propellers of this kind are used i-

  designed to keep rear objects away from each other

  in a continuous row, of a distance such that they can be transferred synchronously in housings arranged at a corresponding distance (spacing) from an input star of a bottle handling machine, for example a machine to be labeled As long as the objects have a simple shape, for example a cylindrical shape, the transfer from the propeller to the input star

  poses no difficulty because no collision can occur

  duire with the housing of the star of entry under the effect of a bad orientation of the object But when it is necessary to transfer angular objects, for example square bottles or triangular bottles, the risk exists that the angles of the bottle strike the angles of the housing which must mechanically grip the bottle. The object of the invention is therefore to propose a

  conveyor propeller suitable for transporting objects

  jets such as shaped bottles, with a star

entrance arranged behind it.

  According to the invention, this result is obtained by means of a conveyor propeller of the type mentioned in the preamble which, due to its pitch, gives objects

  in the transfer region a possible advance followed-

  delay, the advance being such that the angles of angular objects can be transferred synchronously

  in positions, without hitting the entry star.

  Depending on the shape of the bottles and positions, it can

  be advantageous that the propeller, in cooperation with the guide

  of, rotate each object around its own axis

at the time of transfer.

  According to another solution, this result can also be obtained by the fact that the radial height of the radial bearing surface of the thread of the propeller increases in the transfer region, in the direction of the star.

  input so that objects can be transferred

  res in synchronism in the smooth positions between j 5 their angles and the input star With this solution,

  the axis of the object transport path is not tangent

  tiel to the circular path of the receiving positions

  tion nais is located further outside The movement of objects along the propeller on the axis of this transport path is superimposed with the radial movement on the input star A localized acceleration of objects in the region transfer for a smooth passage of these propeller objects in the receiving positions

is therefore not necessary.

  It is already known to move square bottles perpendicular to the direction of transport by a conveyor propeller with an increasing radial height of the bearing surface of the thread of the propeller, but this displacement has another purpose, namely to offset the ones compared to the others square bottles which arrive in a continuous series, so that the bottles with their rear edge have a gripping surface

  for their thrust at the top of the propeller net which

  comes more and more wide in the direction of transport (DE-OS 2 919 488) But with this known conveyor propeller, the bottles are brought back contiguous to each other on their initial transport path, tangentially ending at the entry star The problems which arise with transfer, namely that the angles of the bottles strike the rear edges of the housings of the input star are neither recognized nor resolved in this state of the art.

  1.1 also exist (FR-PS 1 256 178)

  double pitch conveyor belts, arranged face to face

  whose radial bearing surfaces increase in the di-

  rection of transport, but these propellers do not have

  purpose of transferring objects smoothly into the lodges

  elements of an input star, but to separate a row

single in two rows.

  Preferably, in the second solution, the housings have on the rear face and possibly also on the front face a flexible clamp These flexible clamps allow a certain rotation of the bottles to transfer to the star of entry and from the latter More specifically, to transfer bottles

  from the input star to a turntable located behind

  her, on which the manipulation of the bou-

  such as labeling, such rotation does not -

  can be avoided when the bottles need to be

  delivered in a determined angular position A posi-

  determined angular tion must nevertheless be respected

  when labeling must be done in a position

  finished. According to another embodiment of the second solution, with behind the input star a turntable on which are arranged in a circle around its axis of rotation of the turntables on which

  the objects are delivered in synchronism, the plates turn-

  nantes preferably rotate in the opposite direction to the direction

  of rotation of the turntable at the time of transfer.

  This provision compensates for the high peripheral speeds which would produce too high a

  load on the front and rear side of the housings.

  In other words, this rotation reduces the peripheral speed.

  only on the side of the bottle which is furthest outside relative to the axis of rotation of the plate and which in the absence of rotation would be greater than that of the center of the bottle, so that this side leaves practically in synchronism the outer edge of the housing The slight rotation of the bottle in the

  housing that occurs then is offset by a cer-

  tain play in the housing or by the flexible clamps.

  Other features and advantages of the

  vention will appear during the description which goes

  follow from three exemplary embodiments and with reference to the appended drawings in which FIG. 1 represents a conveyor screw with an inlet star for square bottles, FIG. 2 represents a conveyor propeller with an inlet star for square bottles , according to a variant of Figure 1, Figure 3 shows a conveyor screw with an inlet star for triangular bottles Figure 4 shows the conveyor propeller of Fig 1 modified with an inlet star for square bottles : and, Figures 5 and 6 represent two successive phases of the transfer of a square bottle in the

entry star housing.

  The propeller 1 has a net with a flat bottom whose width corresponds to that of one side of a square bottle 2 to be transported The square bottle 2 is held in the net by a guide rail 3 The pitch of the net the propeller 1 increases in the direction of transport The bottles 2 arriving in a continuous row in the region of the propeller 1 therefore deviate from each other with a constant speed of rotation of this propeller At the end of the propeller 1 is arranged an input star

  4 which, at its periphery, comprises housings 5 which can

  wind mechanically engage the square bottles 4 by their rear edge The input star 4 is arranged relative to the transport path of the bottles-2 so that when it rotates, the housings 5

  pass over this transport path.

  In this region, which corresponds to the transfer region, the pitch of the propeller thread is such that the bottles are transported at a speed greater than the peripheral speed of the housing 5 The bottles therefore take an advance in relation to the housings If the bottles did not take this advance, their lower rear angle would strike the rear edge of the housing 5, as shown in phantom in the figure As soon as, due to its advance, the bottle 2 is driven with its edge rear by the rear edge of the housing 5, its speed can again be reduced by a smaller pitch of the propeller thread so that the transport speed of the bottles again corresponds to the peripheral speed of the housing 5, or the rear edge of the housing 5 catches up with the

bottle.

  The embodiment of Fig 2 differs from that of Figure 1 by the shape of the housings 6 of the input star 7 and the guide rail 8 in the region

  In this case, to be able to transport the bou-

  square pins 9 in the triangular housings 6, it is necessary at the time of the transfer to rotate the bottles 9 around their own axis This is done by cooperation of the propeller 10 with the curve Il of the guide 8,

  curved downwards Due to the rotation of the bou-

  teille 9 around its own axis, it occurs at the time of transfer, relative to the periphery of the bottle,

  an advance or a delay of its edge.

  The embodiment of Figure 3 differs

  of that of Figure 2 in that it is intended to transport

  ter of triangular bottles 12 The propeller 13 therefore no longer has a flat thread bottom, but a sharp angle thread As the input star of the embodiment of the,

  Figure 2, the input star 14 includes trian housing

  15 and the guide 16 has in the transfer region, a curve 17 curved downwards so that the triangular bottles 12 which, in

  the previous region of guide 16, are based on this

  deny by a face, undergo a rotation around their own axis at the time of transfer and their angle

comes to rest in the housing 15.

  The embodiment of Figure 4 differs from that of Figure 1 in that, instead of one step

  propeller which becomes significantly larger in the re-

  transfer region, giving the square bottle 2 an advance relative to the housing 5, the bearing surface

  radial 18 has a radial height which increases in the di-

  rection of transport, to move the cylinders

  rees 19 with respect to the axis 20 of the transport path in the rest of the propeller 21, in the direction of

  the entry star 22 This movement is superimposed on the

  translation movement along the axis 20, so that the perpendicular movement allows a smooth transfer of the square bottles 19 in the housings 22 of the input star 23 as shown by the two phases

  successive movements in Figures 5 and 6.

  Radial transfer of square bottles 19

  in synchronism in the housings 22 of the star of

  trée 23 allows a particular realization of these boxes

  ments 22 As shown in the Figure, the bottle 19 is gripped as by a clamp by its opposite sides So that the bottles 19 can be easily extracted from the housings 22 by the turntable 24 of a bottle handling machine produced for example as a labeling machine, it is advantageous that at least one clamp 25, preferably the two clamps 25, 26, are flexible With this embodiment, it is possible that the bottles 19 held in an angular position

  well determined in the housing 22 of the star of

  23 are removed in this position by the plate

rotating cap 24.

  When the bottles 19 are removed by the turntable 24, these bottles are clamped between

  a turntable 27 and a turntable, not shown

  For the transfer to be possible in synchronism

  me, the peripheral speed of the center of the bottle in the housing 22 of the input star 23 and that of

  the receiving position 27 of the turntable 24 corresponds to

  respond This condition of synchronism is not respected

  rigorously tightened only for the center of the bottles 19, but not for their external angles which, when transported by the turntable 24, have a higher speed

  because of their greater distance

  dial of the axis of rotation To nevertheless allow easy transfer, without overloading due to the different peripheral speeds the front and rear faces, therefore the clamps 25, 26 of the housings 22, the plate

  rotating 27 rotates in the opposite direction to that of the

  rotating cap 24 Because of the backward rotation, there is also a certain jamming of the bottle but the load thus produced on the clamps 25, 26 is

  low compared to a charge produced by vi-

  different peripheral tresses.

Claims (4)

  1 Conveyor propeller for objects, such as shaped bottles, in the net of which the objects are mechanically held by a guide which extends along the length of the propeller, the objects being transported along the propeller by rotation of the latter and at the outlet of the propeller being disposed a   input star with positions at its periphery,   especially housings, adapted to the shape of the objects, in which the propeller transfers the objects, characterized in that the conveying propeller (10, 13) due to its pitch, gives the objects in the transfer region a followed advance possibly a delay, or a delay with respect to the positions (5, 6, 15) of the input star   (4, 7, 14) such that the angles of objects can be trans-   synchronized in positions (5, 6, 15) without collides with the star of entry.   2 Conveyor propeller according to claim 1, characterized in that, in cooperation with the guide (8, 16) it rotates each object (9, 12) around   its own axis at the time of transfer.   3 Conveyor propeller for objects, such as   shaped bottles, in the net of which.   the objects are held mechanically by a guide which extends along the length of the propeller, these objects being transported along the propeller by the potation of the latter and at the outlet of the propeller being arranged a   entry star with positions at its periphery,   especially accommodation adapted to the shape of the objects,   propeller characterized in that the radial height of the over-   radial bearing face (18) of the propeller thread (21) increased   in the transfer region, in the direction of the star   the input (23) so that the objects (19) can be transferred synchronously to the positions (22)   smoothly between their angles and the input star (23).   4 Conveyor propeller according to claim 3, characterized in that the positions (22) constituting the housings include a flexible clamp (25, 26) on   a rear side and possibly on the front side.   Conveyor propeller according to claim 4, with behind the input star a turntable on which are arranged in a circle around its axis of rotation the turntables on which the objects are delivered in synchronism, characterized in that, at at the time of transfer, the turntables (24) rotate   in the opposite direction to the direction of rotation of the turntable- nant (24).