FR2469980A1 - SUPPLY DEVICE FOR ANNULAR PARTS TO BE ORDERED DIRECTLY TO A WORKING MACHINE - Google Patents

Abstract

DEVICE FOR SUPPLYING ANNULAR K PIECES TO A MACHINE. THE PIECES K FOUND IN A MAGAZINE SHAPED BETWEEN TWO DISCS 2 ARE COLLECTED BY HOOKS 8 OF A TRANSPORT STRIP 1 WHICH CONSTITUTES THE BOTTOM OF THE MAGAZINE; THE TAPE THEN GOES ON TWO DISCS 3 BETWEEN WHICH A FUNNEL IS PROVIDED FOR COLLECTING THE COINS DROPPING FROM THE HOOKS; THESE PARTS ARRIVE, THROUGH A SLOT SHAPED BETWEEN A SLIDING WALL 13 AND A RUBBER APRON 15, ON AN INCLINED ROLLING SURFACE 20; PARTS WHICH DO NOT LIE DIRECTLY ON THIS ROLLING SURFACE OR WHICH DO NOT LIE UP CORRECTLY ON IT ARE REJECTED AND FALL BACK INTO A RETURN FUNNEL WHICH RETURNS THEM TO THE STORE. APPLICATION IN PARTICULAR TO THE AUTOMATIC TRANSPORT OF PISTON RINGS TO A MACHINE.

Description

i 2469980 Feeding device for annular parts to be

  fed in an orderly manner to a machining machine.

  The invention relates to a feed device for annular parts, in particular piston rings, to be fed in an orderly fashion to a machine for machining.

continuously.

  Apart from the fact that workpieces or workpieces taken in a disordered manner from a reserve must be

  brought to a machine in an orderly manner, that is,

  say individually one after the other, the

  necessary for this purpose and the transport of

  must not exert any force leading to

  tears or deformations on the pieces of work. In known devices of this type, which comprise for example a fixed magazine with pallets for extracting parts, careful handling of this type is not possible; they are therefore not suitable for example for the supply of piston segments deforming relatively easily. In the case of particularly fast machining machines, for example grinding machines with two grinding wheels for machining simultaneously

  the front faces of the pieces of work,

  magnetic disks, for example, barely have the transport capacity necessary for

continuous machine.

  The present invention proposes a feed device of the mentioned type whose working speed can be adapted most simply to the needs of the machine to be loaded,

  without any forces leading to deformation or

  Unwanted deteriorations of fragile workpieces, for example piston rings, are exerted on the workpieces. For this purpose, the device according to the invention is characterized in that it comprises an endless transport member, which can be continuously driven, which constitutes the bottom of a store of parts containing the pieces of work and includes extraction members for the workpieces,

  and which leads, upward from the store, to a

  Positive orientation which includes a funnel formed by slippery walls approaching wedge-shaped and whose

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  the exit slot inclined relative to the vertical in the

  extension of its rear wall opens above an over-

  inclined bearing surface perpendicular to the rear face

  re, along which the workpieces, transported by the extraction members of the transport member so as to hang freely over the funnel and from there falling in the latter, roll up to the place loading, a

  frontal faces sliding on a guide wall delimiting

  both sideways the running surface and level with

said sliding wall.

  The conveyor belt constituting the bottom of the magazine and leading upwardly from the latter ensures that its extraction members collect virtually smoothly.

  and transport up the pieces of work they

  while all the pieces that do not have

  have been seized by an extractor organ continuously slide the transport organ that goes back to return to

  the shop. The pieces liberated at the top by the organizations

  extraction as a result of the corresponding change of direction

  of the transport member are then brought to the loading place by rolling and sliding only

  under the effect of their own weight and form a continuous series

  naked pieces of work oriented in the same way. During this transport phase the workpieces do not suffer any unwanted foreign forces. Naturally, the loading speed is regulated firstly according to the speed of the transport member and secondly according to the inclination of the sliding surface or respectively of the running surface. An appropriate choice of these magnitudes

  allows to adapt in a simple way the flow of the device of

  born to the machining capacity of the machine to be loaded.

  The present invention will be better understood by reading

  following detailed description and examination

  appended drawings which represent, by way of example not

  -35 limiting, an embodiment of the invention.

  Figure 1 is a front view partially in section (along the line y-y of Figure 2) of a device for loading a machine with piston rings;

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  FIG. 2 is a vertical sectional view of the device

  tif along the line x-x of Figure 1; -

  FIG. 3 is a sectional view, on an enlarged scale, of part of the orientation device of the device according to FIG. 2; FIG. 4 is a sectional view along the line w-w

  of Figure 1, on an enlarged scale, of another part of the

  positive orientation; Figure 5 is an enlarged view of another detail of Figure 1; Figure 6 is a sectional view, on an enlarged scale, along the line z-z of Figure 1; and FIG. 7 represents on a larger scale a detail of

Figure 6.

  In the drawings reference 1 denotes an endless conveyor belt, for example made of rubber or synthetic material; one could also use a band of

  hinge chain metal transport. Band 1 goes to

  a top roll driven by a motor and a lower roll 6 of direction change. The stretch of tape starting from the bottom and arriving on the drive roller is first guided through two discs

  3 whose trunnions 3 'are mounted in 3 "bearings, tan

  say that the section of strip which descends from the roll 6 of directional change is then guided from the bottom by means of two discs 2 which can turn around

  of a tree 2 '. Between the two pairs of discs 2, 3, the section

  The tape section is almost vertical, the section

  descending band portion being maintained at a distance from the other strip section by support rollers 4, in the region of pairs of discs 2, 3 making change the direction of the stretch of band that goes up. On the outer side of the conveyor belt 1 are arranged! regular intervals of the transverse rods 7 having a cross-section in the form of

  which are respectively provided with a series of croissants

  8. The front side of the hooks, which protrudes in the direction of transport, is straight and relatively small and terminates in a point, is inclined in relation to the plane of the

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  band forming a relatively large acute angle, while the rear side of the hooks 8 is rounded. The mutual spacing of the hooks 8 on the transverse rod 7 is slightly larger than the diameter of the piston rings K to be transported. It will be understood that depending on the type and shape of the workpieces to be transported, instead of the hooks 8 may also be provided drive members having other shapes, for example buckets, fins or elements similar. Deflectors 9 are fixed on the band 1 between the transverse rods 7 which follow each other and between the hooks 8 of these rods. The chamber formed between the discs 2 and the band 1 and open towards the

  top serves as a store for piston rings K to be transpor-

  ter; to better close this store laterally, we plan

  plates 10, forming side walls (Figure 2).

  A funnel delimited by vertical side walls

  12a is provided between the upper discs 3. Above the rear wall 12 of the funnel, inclined towards the band 1, is disposed an adjustable sliding wall 13 which projects downwards and is inclined obliquely towards the side of the funnel 12. outside, substantially parallel to the wall 12, starting substantially at the height of the middle of the disks

  3 and at a distance from the tape that does not interfere with the free

  the hooks 8 of the strip 1. The rear wall 12 is

  ends so that the bottom edge is inclined

  horizontally, at an acute angle, towards a corresponding inclined running surface

  and perpendicular to the plane of the rear wall; an extension

  corresponding lateral wall 12b of the rear wall 12 of the

  funnel forms the rear wall of the running surface 20 which extends obliquely downward and to the side towards a

  the place of exit whose height is determined by the

  machining chine to be loaded, not shown.

  The front wall 14 of the funnel is inclined in the opposite direction and is pivotally mounted on the side walls 12a. The front wall 14 is loaded by a

  adjustable pressure spring 16 acting from the outside

  laughing. On the lower edge of the front wall 14 is fixed

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  a strip 15 made of a material having the elasticity of rubber

  (eg rubber, synthetic material or

  similar material), which is maintained, under the action of the spring 16, at a short predetermined distance from the sliding wall 13. Outside the front wall 14 is disposed an apron 17, made of material having the elasticity of the rubber which is supported by a roller 18. The apron 17, whose upper end is wound on the roller 18, hangs freely downwards towards the lower marginal portion of the rear wall 12 of the funnel. It will be understood that, as

  it can be seen in Figure 1, the lower edges of the ele-

  12, 13, 14, 15 and 17 extend obliquely in correspondence

  This inclination of the running surface 20, consisting of a metal or a material having a sufficient frictional resistance, is chosen so as to obtain the desired rolling speed of the rolling parts. K. As can be seen in FIG. 1, on the side of the apron A is provided another apron 19 constituted by a material having the elasticity of the rubber, which bears against the lateral extension 12b.

  of wall 12. Following this apron 19 is provided an ejection

  21 which is fixed on a guide 22, parallel to the running surface 20, which limits the passage height available for the workpieces K on the running surface 20. As a result of the ejector 21, several lamellae successive separation members 23 are associated with the running surface 20 these separating strips 23, consisting of steel

  quenched, are pivotally mounted on a longitudinal axis

  nal 23a; an adjustable counter-weight 27 makes it possible to adjust the

  this desired pressure of the slats 23 (Figure 4). The first

  first lamella 23 according to the ejector 21 carries a stop cam 24 of synthetic material, preferably "Teflon". To the

  following separation slats 23 and before a discharge channel

  formed by the extension 12 of the rear wall of the sup-

  - Rolling face 2, the upper guide 22 and a strip

  29, is provided a ratchet wheel 25 serving ejection

  tor (FIGS. 1, 6, 7) to which is associated a metal sheet

  26. The ratchets of the ratchet wheel 25 serving

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  ejector sweep the section of the running surface 20

  which leads to the exit channel, at a distance from the

  12b of the rear wall which is only slightly more

  As shown in FIG. 6, the width of the rolling surface 20 is reduced substantially to this dimension after the ejector 21. rolling surface is provided a receiving channel 28a, starting from the beginning of this surface, which opens into a return funnel 28 in the region of the separation plates 23 and the wheel to

  As can be seen in Figure 1, the funnel de-

  mouth over the store formed between the two discs 2.

  The operating mode resulting from the described constitution of the feed device is as follows: the segments

  Piston K to be fed to the machine are in-

  products in the store. The square brackets 8 of the trans-

  port 1 driven in the direction of the arrow x (Figure 2)

  pour the magazine disposed underneath, a piston ring or several superimposed piston rings hanging on

  these hooks. The stretch of tape going back from the magazine

  sin causes these piston rings K which have remained

  while piston rings K which are not cor-

  The piston rings K transported upward while hanging freely on the hooks 8, as

  shown in Figure 2, automatically fall off

  8 in the funnel when band 1 changes direction

  around the discs 3, and rest flat on the wall

  slippery 13 from where they slide down to the first

  slit formed between the sliding wall 13 and the apron 15.

  In the case where, as shown in Figure 3, two segments

  Successive piston elements K overlap, the friction of the deck 15, consisting of a material having the elasticity of the rubber, which is more important than the friction due to the relatively low sliding of the metal wall.

  brakes more strongly the piston ring which is

  above it and therefore it is separated from the piston ring below. This ensures that all segments of

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  piston arriving on the lower rolling surface 20 are in a plane determined by the rear wall 12 in

  which they are held by the second apron.

  relatively steep segment of the piston rings on the

  bearing surface 20 can cause a rebound of the segments

  piston parts; this is prevented not only by the friction

  apron 17, but also by the sliding sliding wall 13 which is adjusted so that the distance d of its

  lower edge (FIGS. 3, 5) with respect to the roughness surface

  20 is slightly larger than the diameter of the piston rings, while the distance between the wall 13

  and the rear wall 12 is slightly smaller than the

  geur m piston rings. As a result, the piston rings can not bounce off either the sliding wall 13 or

  under this last. When now, despite the said

  res, two piston rings K or even several segments that overlap exactly and easily adhere to each other, arrive on the tread surface 20, the friction

  aprons 17 and 19 tend to push back the segment

  tif that sits above such a stack of the segment that is

  just below, so that on the surface of rub-

  a series of individual piston rings which follow

  wind direction towards the ejector 21. The guide 22 following this ejector 21 ensures that in fact there is no

  such a series of piston rings K rolling on the surface

  bearing surface 20 which arrives at the outlet, while piston rings which still descend below this series of segments which roll along the wall extension 12b (as shown in dashed lines in FIG. 5) are retained by the ejector 21 and rejected in the return funnel 28. When, on the other hand, despite the effect of separation, mentioned above, the friction of the aprons, two piston rings adhering to each other arrive in the region of the guide 22, the separating lamellae 23 which are thereafter and the stop cam 24 act in such a way that

  reality there are only individual segments on the surface

  this rolling 20, while a second segment that adheres to a segment that rolls correctly along the 12b extension

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  of the wall on the running surface 20 is removed and

  Also, in the return funnel 28, since neither the aprons 17, 19 nor the slats 23 should block the piston rings on the sliding surface 12b, their pressing force may not be sufficient. to absolutely prevent mutual overlapping of the following segments K on the running surface 20 (FIG. 7). In this case, the ratchet wheel 25 which rotates in the opposite direction to the direction of transport is used so that its ratchets grip the

  piston ring K above and remove it from the

  firing of the rolling surface through the sheet

  deflector 26 and send it into the return funnel 28.

  It is ensured that in the outlet channel which leads to the machine to be loaded, a series of piston rings K, following each segment after segment, roll up to

  the place of exit with a speed corresponding to the incli-

  of the running surface, while all segments

  originally driven by the conveyor belt, but

  not fitting into this arrangement by moving away from the

  upper funnel to reach the exit channel, are continuously rejected and returned to the store. Since the conveyor belt 1 constitutes the bottom of the magazine, the segments therein are driven with it so that the hooks 8 do not catch in jerks. The fact that the segments fall from the hooks and their subsequent transport to the exit point of the outlet channel is due solely to the effect of their own weight so that damage to these segments as they may occur produce with transport and orientation mechanisms by

  thrust or pressure, are avoided.

  It will be understood that the speed of transport of the

  tif described can be modified by varying the drive speed of the rollers 5. By varying the bearing force of the spring 16 and therefore the braking action of the deck 15, it is also possible to vary the speed of the arriving segments on the running surface 20 from the funnel, while varying the height and therefore the effective friction surface of the aprons 17

  and 19, one can vary the speed of the segments on the over-

  On the other hand, it is not necessary to adjust the device to a lower flow in the case o

  the speed of reception of the machining machine is too low

  corn. In the case where the receiving speed of the machine decreases, as soon as the segments accumulate in the outlet channel behind the front ruler 29, as seen in FIG. 7, these segments overlap and the segments in

  surplus are compulsorily removed and returned to the

  gasin. There is therefore no need for any particular synchronization measure to adapt the bit rate to segments oriented to the

  reception capacity of the machine.

  Although we have just described a device for the soul

  piston rings, it is also possible to use a

  of this type for other annular workpieces, for example bearing rings, valve ring seats, or the like. The training organs of the

  band and the elements delimiting the path of fall and rou-

  parts must be selected on the basis of

  type, shape and dimensions of the pieces of work.

  Of course, the invention is in no way limited to the embodiment of the example described and shown, it is capable of numerous variants accessible to humans.

  of art, according to the intended applications and without

  ter for that of the scope of the invention.

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Claims (7)

  1. Feeding device for annular parts,   piston rings, to be brought in such a way   ordered to a continuous machining machine, which is   characterized in that it comprises an endless transport member (1), which can be driven continuously, which constitutes the bottom of a store (2) of pieces of work containing the pieces of work (K) and comprises extraction members (8) for   pieces of work, and which leads, upwards from the magazine   sin, to an orientation device (12-17) which comprises a funnel formed by sliding walls approximating   wedge-shaped way and whose exit slit inclined by   port vertically in the extension of its rear wall   (12) opens above an inclined surface (20)   perpendicular to the rear face (12), along which the workpieces (K) transported by the extraction members (8) of the transport member (1) so as to freely hang over above the funnel and from there falling in the latter, roll up to the loading point, one of the front faces sliding on a guide wall (12b) laterally delimiting the running surface and level with said sliding wall.   Feeding device according to Claim 1, characterized in that the working section of the transport element (1) starts from a direction change roller (6) arranged on one side of the magazine, passes around it on the lower side   two discs (2) laterally delimiting the magazine for   up and back, via two discs (3)   which is the funnel, a roller training   (5), from where the transport member (1) is brought back to the direction of the roll (6), by means of support rollers (4), at a certain distance from said section working.   Feeding device according to Claim 2, characterized in that the rear wall (12) of the funnel is superposed with an adjustable sliding wall (13) which terminates at a distance (d) above the rolling surface (20) and with which an apron (15)   the elasticity of the rubber which is arranged on the lower edge   the front wall (14), pivotally mounted, of the funnel, said front wall and its apron (15) being loaded by an adjustable pressure spring (16) towards the sliding wall (13). ). 4. Feeding device according to claim 3, characterized in that outside the front wall (14) of   the funnel is suspended an apron (17) presenting the elasticity   cited rubber and adjustable in length, whose lower edge   is supported on the marginal part of the rear wall (12) of the funnel which is under the sliding wall (13)   and comes against the running surface (20).   Feeder according to Claim 4, characterized in that at a lateral extension (12b) of the rear wall (12) of the funnel, which forms the rear wall of the running surface (20), is associated another apron (19) having the elasticity of the rubber and on which is provided an ejector (21) which is connected to a guide (22) for   limit the height of passage above the road surface   (20), a receiving groove (28a) being provided   below the running surface (20) and opening into a return funnel (28) reaching the entrance of a channel   exit and ending above the store.   6. Feeding device according to claim 5, characterized in that the exit channel defined at the entrance   by a front ruler (29) and limited on all sides to the di-   dimensions of the pieces of work (K) to be fed are associated with separating lamellae (23) for separating pieces of work which adhere to one another and to return the non-supporting piece of work on the rear wall (12b) of   the running surface in the return funnel.   7. Feeding device according to claim 6, characterized in that downstream of the separating lamellae (23)   there is disposed a ratchet wheel (25) upstream of the   of the outlet channel and rotatable, about an axis perpendicular to the running surface, in the direction opposite to the rolling direction of the running surface, its 12 2469980   ratchets being arranged at such a distance from the rear wall   re (12b) of the running surface (20) that they grip work pieces passing on the running surface without being flat on the rear wall (12b) and transporting them in the return funnel (28). .