said grape - harvesting machine may have structure defining only one tunnel for collecting the grapes of one row of vines stocks 1 . beaters 2 and 3 are disposed opposite each other on either side of said vine row . a second pair of beaters 4 and 5 is mounted in a similar manner . each of these four beaters is made of horizontal flexible whips , vertically superposed along the whole height of the vines , each whip is fixed by one of its ends to a beating mechanism transmitting to them a transverse movement . the free ends or points 6 of the whips thus shuttle the vines . the speed received by the grape clusters from one beater generates a tearing force when the motion is stopped by the opposite beater . each whip of a beater 2 is fixed to a transverse lever 7 within which is rotatably mounted an eccentric 8 having a vertical axis . the rear end of lever 7 is hinged to the end 10 of a longitudinal horizontal connecting rod 11 . a second eccentric 13 is provided in the head end 12 of connecting rod 11 . second eccentric 13 is integral with a vertical shaft 14 which is adapted to be rotated . the vertical shaft 9 is pivoted in bearings 20 carried by the frame of the machine . it is integral with the first eccentric 8 and connected to resilient return means 15 . said resilient return means can be a return spring 15 having one end 15a fixed to the frame of the machine , and the other end 15b fixed to an arm 16 integral with the vertical shaft 9 . a similar system is symmetrically mounted in opposition on the other side of the row of vines . this system 17 is moving beater 3 by means of an eccentric 18 rotating on a vertical shaft 19 which is similar to shaft 14 . each beater 4 or 5 of the second pair also includes a transverse lever 26 ( or 29 ) oscillating about a first eccentric which is integral with a vertical shaft . said transverse level has a rear end hinged to the end of a longitudinal connecting rod 24 ( or 25 ) in the end of which is rotating a second eccentric . in the structure illustrated on fig1 the transverse motion of beaters 2 and 4 located on the same side of the vine row is generated by the rotation of the same vertical shaft 14 . both beaters 2 and 4 have synchronous movements . the phase shift between both movements is determined by the angular relative position of eccentrics 13 and 21 on shaft 14 ( fig1 and 2 ). in the drawings , it has been supposed that beaters 2 and 4 are in phase opposition ( 180 ° phase shift ), but any other timing could be determined . for example , both movements could be in phase coincidence . longitudinal bars 24 and 25 are connecting the front and rear beaters respectectively on each side of the vine row . the front end of connecting bar 24 is hinged to the arm 16 integral with shaft 9 . the rear end of connecting bar 24 is hinged to a l - shaped arm 26 integral with the vertical shaft 27 of the eccentric mechanism 22 . in a similar manner , the connecting bar 25 disposed on the other side of the vine row , is connecting the oscillation mechanisms of beaters 3 and 5 , by means of eccentric vertical shafts . finally , a transverse connecting bar 28 is connecting the free ends of both l - shaped arms 26 and 29 of the second couple of beaters 4 and 5 . l - shaped arms 26 and 29 are fixed to eccentrics 30 &# 39 ; and 31 &# 39 ; with their longitudinal portions orientated in opposition . this disposition of elements 26 , 28 and 28 determines for the two eccentrics such as 8 on one side of the vine row , an angular position which is at any moment symmetrical of the angular position of the corresponding two other eccentrics on the other side of vine row , with respect to the symmetry vertical plane 1 . when stocks 30 , 31 , 32 , etc . . . . of the vine row 1 are in line , the operation of the mechanism is as follows : the end of connecting rod 11 is moved longitudinally by means of second eccentric 13 and rotating shaft 14 ( fig5 , 7 and 8 ). connecting rod 11 and transverse lever 7 form an oscillating mechanism which is moving about two fixed axis , namely the geometrical axis of shaft 14 and the central axis 35 of the concerned first eccentric 8 . first eccentric 8 only supports relatively low forces , so that the resilient means 15 generates a return force f sufficient for compensating the vine reaction r at any moment of the beating operation . the center 35 of first eccentric 8 remains in a stationary position which is determined by the force f . said force f tends to bring back beater 2 close to the vine row 1 , and it is used to damp or filter the subsidiary oscillations having a frequency higher than the beating frequency . the longitudinal stroke c of hinge point 10 ( equal to the double of the eccentration value 36 of second eccentric 13 ) is pivoting the transverse lever 7 about the center 35 of the first eccentric whips is illustrated on fig6 . the minimal opening corresponds to the beater position illustrated on fig8 . the oscillation transverse amplitude is equal to an angle 38 , the value of which is predetermined according to the dimensioning of the beating mechanism and according to the angular orientation of eccentrics 8 . each eccentric 8 is normally kept in a stationary position by means of the calibrated resilient return means 15 acting on shaft 9 . coordination between the movements of the four beaters 2 , 3 , 4 and 5 is obtained by means of longitudinal connecting bars 24 and 25 , and by means of transverse connecting bar 28 ( fig1 ). fig9 to 12 respectively correspond to fig5 to 8 , but showing how the heater mechanism is self - adjusting when a beater such as 2 , receives from the vine , a reaction ( r and r ). the additional force is for example resulting from the fact that some vine stocks 33 and 34 are shifted laterally out of the row . at any moment , the reaction ( r and r ) is compensated by a return force ( f and f ), wherein the additional force f is due to the elongation of return spring 15 . arm 16 is pivoted in the direction of arrow 40 , thus driving shaft 9 and first eccentric 8 . the center 35 of eccentric 8 is moved away from the vine row 1 up to a distance d 1 more than initial distance d . comparing fig5 and 9 , 6 and 10 , 7 and 11 , 8 and 12 , it appears that : when the pivot axis 35 of lever 7 moves away from vine row 1 ( d 1 & gt ; d ), the points 6 of a beater 2 also move away from the vine stocks ; the maximal opening 42 m ( fig1 is more than the maximal opening 37 m obtained in normal operating conditions ( fig6 ); the minimal opening 42 m ( fig1 ) is more than the minimal opening 37 m in normal operating conditions ( fig8 ); with the same length of the longitudinal stroke c of articulation point 10 , the transverse oscillation amplitude of beater 2 is illustrated by an angle 43 ( fig1 ) which is more than the normal amplitude 38 . fig4 illustrates the orientation of eccentrics 8 . under action of the reaction ( r and r ) when the machine is moving forwardly ( arrow 50 ), the resilient return system 15 is elongated , thus generating a return opposite force ( f and f ). as previously described , shaft 9 is rotated in bearings 20 together with first eccentrics 8 , the center 35 of which is moved as indicated by arrow 41 about the vertical axis of shaft 9 . if reaction ( r and r ) is persisting , the position of the geometrical pivot axis of levers 7 is modified relatively to hinge point 10 and to rotating shaft 14 . as soon as the reaction ( r and r ) comes back to its normal value r , the return system 15 automatically brings back arm 16 , first eccentric 8 , and center 35 to their original position . fig1 illustrates diagrammatically the general distribution of forces on the self - adjusting operation of the whole beating mechanism when only one of the beaters ( for example beater 2 ) receives an increase r in the vine stocks reaction . said additional reaction r causes an additional elongation of resilient return system 15 ( arrow 43 ). arm 16 and first eccentric 8 are pivoted in the direction of arrows 40 and 41 . this results in the following motions : cranked arm 26 is pivoted in the direction of arrow 45 ; the corresponding first eccentric is rotated in the direction of arrow 46 ; transverse bar 28 is moved in the direction of arrow 47 ; cranked arm 29 is rotated in the direction of arrow 48 together with the center 35c of the corresponding first eccentric ; connecting bar 25 is moved in the direction of arrow 44 ; finally , the center 35d of the first eccentric on beater 3 is shifted in the direction of arrow 49 . the final position of the pivot axes 35a , 35b , 35c , and 35d of the four beaters 2 , 3 , 4 , and 5 ( fig1 and 14 ) is illustrated on fig1 . it appears that the centers 35 have been moved angularly of 90 ° about vertical axis of their first eccentrics ( such as 9 ). moreover , the vertical plane 1 of the vine row remains a symmetry plane for the opposite eccentrics . finally , as soon as the additional reaction r is suppressed , resilient return systems 15 bring back automatically said first eccentrics to their original position . it will be understood that with this disposition , the operator can modify the beater whips spacing 42 or 37 ( fig5 to 12 ) from his driving seat , during the machine operation . quite obviously , it would be possible to use various embodiments for the resilient return means 15 , for the connecting elements between the first eccentrics of the beaters , or for the phase shift of the beaters . this would be possible without leaving the scope of the invention . for example , it would be possible to suppress the transverse bar 28 . in this case , the two couple of beaters 2 , 3 , 4 , and 5 still would be self - adjusting under action of their respective resilient return means 15 , but both beating planes 2 , 4 and 3 , 5 would be independent from each other . in another possible embodiment , a mechanism including a chain 51 and a chain wheel 52 integral with shaft 14 ( fig1 ) could be used for connecting the rotation of both shafts 14 and 19 . fig1 and show how the self - adjusting beating mechanism of the invention can be adapted on a grape - harvesting machine 43 of known type . said machine 52 is collecting grapes on only one vine row 1 . the grape clusters are falling down onto movable plates 54 , then evacuated by side transporters 55 on each side of the vine row and finally by a general rear transporter 56 . fig1 illustrates a general frame 57 having two harvesting tunnels 58 disposed side by side . this machine is towed by a tractor 59 driven between the two vine rows concerned ( arrow 60 ). in each tunnel 58 , grape clusters are collected by means of a self - adjusting beating mechanism according to the invention . the frame 57 is carrying at least two beating groups , i . e ., at least eight beaters . the spacing between both beating groups can be adjusted in the known manner by transverse carriages 61 and 62 . it is possible to reduce the spacing between the beating planes , as well at the front portion as at the rear portion of the machine . it is also possible to give the beating whips , an orientation substantially parallel to the vine row . therefore , each whip is beating along a bigger length , so that the most ripe grapes are detached from the vine stock prior to being shuttled by the whip ends . this results in a reduction of the shocks , and the grape berries are collected without being damaged . when the dimensions of the vine stocks is varying along a vine row ( some vine stocks are thicker than others ), the grapes are automatically detached in the best manner at any moment , namely : if the vine stocks are thin , the spacing between the beating planes is automatically decreased by the resilient return means , while the beating frequency remains constant and the oscillation amplitude is mimimal ; if the vine stocks are thicker , the foliage reaction on the beater rotates the eccentrics , while the spacing between the beating planes is increasing ; therefore , the distance between the free ends of the whips is increased , but this greater opening is compensated by an increase of the transverse oscillation frequency . it should be understood by those skilled in the art of grape harvesting that other forms of the present invention can be had , all coming within the spirit of the invention and the scope of the appended claims .
a beating device for a grape harvesting machine for the harvesting of grapes from a row of grapevines . the beating device comprises a pair of beaters mounted on the harvesting machine in opposing relationship to define thereinbetween a longitudinal space for the passage of a row of grapevines . each of the beaters comprises a plurality of vertically spaced , horizontally disposed whips , the ends of which are mounted to a lever which , in turn , is pivotally carried by a first eccentric so as to impose a transverse beating action to the whips . a first shaft , rotatable about a vertical axis , carries the eccentric while the eccentric carries an arm member attached to an adjustable resilient return means which functions to automatically return the whip toward the longitudinal space with the resilient force increasing in response to the resistance of the whip when the same engages a grapevine offset from the normal plane of the row of grapes . the other end of the lever is attached by means of a connecting rod to a second eccentric mounted to and rotatable with a second vertical shaft . motor means are provided for driving the second shaft .