EP4367047A1 - Procede de changement d'organes de prehension dans un dispositif de convoyage de corps creux - Google Patents
Procede de changement d'organes de prehension dans un dispositif de convoyage de corps creuxInfo
- Publication number
- EP4367047A1 EP4367047A1 EP22740921.6A EP22740921A EP4367047A1 EP 4367047 A1 EP4367047 A1 EP 4367047A1 EP 22740921 A EP22740921 A EP 22740921A EP 4367047 A1 EP4367047 A1 EP 4367047A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shuttle
- support
- transport
- shuttles
- replacement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/84—Star-shaped wheels or devices having endless travelling belts or chains, the wheels or devices being equipped with article-engaging elements
- B65G47/846—Star-shaped wheels or wheels equipped with article-engaging elements
- B65G47/847—Star-shaped wheels or wheels equipped with article-engaging elements the article-engaging elements being grippers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/84—Star-shaped wheels or devices having endless travelling belts or chains, the wheels or devices being equipped with article-engaging elements
- B65G47/841—Devices having endless travelling belts or chains equipped with article-engaging elements
- B65G47/842—Devices having endless travelling belts or chains equipped with article-engaging elements the article-engaging elements being grippers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G54/00—Non-mechanical conveyors not otherwise provided for
- B65G54/02—Non-mechanical conveyors not otherwise provided for electrostatic, electric, or magnetic
Definitions
- TITLE METHOD FOR CHANGING GRIPPERS IN A HOLLOW BODY CONVEYING DEVICE
- the invention relates to a method for changing gripping members in a device for conveying hollow bodies of a container manufacturing installation, the conveying device comprising:
- each shuttle carries at least one member for gripping a hollow body, each shuttle comprising at least one support member;
- the invention also relates to an assembly intended to implement such a method.
- thermoplastic containers such as bottles, flasks, etc.
- preforms sometimes called blanks
- forming means for example blow molding or stretch-blow molding.
- the term “hollow body” will be used to denote either a preform or a finished container.
- the preform and the finished container have an identical neck or neck. Therefore, the same member for gripping a preform by its neck is also suitable for gripping a finished container obtained from said preform.
- the preforms Before being formed into final containers, the preforms undergo several treatments along a running path.
- the preforms can thus undergo a heating treatment, a sterilization treatment and a forming.
- the container manufacturing installation is supplied with preforms which are not in a state to be directly formed. Prior to their molding by blow molding or stretch blow molding, the preforms are therefore heated in a heating station so as to give their body a consistency that is sufficiently malleable for the blow molding operation.
- Such installations for the mass production of containers are equipped with a heating station comprising a heating tunnel provided with means for heating the preforms.
- the preforms are generally conveyed along the tunnel at high speed without marking a stop by a conveying device.
- the tunnel has a sufficient length to allow the heating of the preforms during their crossing.
- the conveying device comprises individual preform gripping members which move along a loop conveying path, one section of which conveys the preforms along the heating tunnel.
- the grippers are generally formed by mandrels which are capable of driving the preform conveyed in rotation around its axis to guarantee uniform heating of the preform.
- the preforms to be heated are brought one after the other by an entry wheel to an entry zone in the heating station. On this input wheel, two successive preforms are spaced apart by a first determined spacing.
- the hot preforms are transferred to an exit wheel on which two successive preforms are spaced apart by a second determined spacing.
- the second spacing is generally equal to the first spacing.
- the grippers are generally supported by the links of a conveying chain which is driven in motion along the heating path, for example by toothed wheels.
- the preforms pass through the heating tunnel with too large a gap between two preforms, part of the heating radiation is expended with low efficiency by passing between the preforms.
- linear motors comprising shuttles independent of each other which are guided by a track guidance along the conveying path.
- the displacements of each shuttle are controlled individually by means of a linear motor comprising at least one magnet on board each shuttle and a fixed magnetic path with respect to the guide track emitting a controlled magnetic field.
- the shuttles are thus likely to be spaced apart or brought closer to each other on different sections of their journey.
- linear motors make it possible relatively easily to produce a network of tracks comprising branches which are connected to the conveying path in the direction of sidings formed of linear motor sections.
- the shuttles are selectively oriented towards the conveying path or towards the sidings by means of switching devices similar to those which exist in the technical field of rail transport.
- the sidings thus make it possible to store part of the shuttles while another part of the shuttles circulates on the conveying path.
- the object of the invention is to propose a method for changing gripping members on shuttles which is less expensive while remaining extremely fast.
- the invention thus proposes a method for changing gripping members in a hollow body conveying device of a receptacle manufacturing installation, the conveying device comprising:
- each shuttle carries at least one member for gripping a hollow body, each shuttle comprising at least one support member;
- At least one guide member for guiding the movements of the shuttle in a direction of movement along a conveying path by contact with the support member, and against which the shuttle is in unilateral support in a direction d determined support; characterized in that it comprises:
- the shuttles are moved only in rectilinear translation.
- the shuttles are moved in translation in a direction parallel to the direction of support of the shuttle on the guide member located at the replacement point.
- the magazine comprises shuttle receptacles which are movable along a storage circuit, the shuttles arriving from the conveying device being received in a receptacle located at a point of the storage circuit.
- the replacement shuttle is routed to the exchange point of the store after the shuttle arriving from the conveying device has been deposited in its receptacle, the replacement shuttle being transported from the exchange point of the storage circuit of the store to the point of replacement of the conveyor path by said transport device.
- each shuttle circulating in the conveying device is held in abutment against the guide member by a magnetic attraction force between a magnet of the shuttle and an element of attraction arranged along the conveying path.
- a mobile section of the attraction element located at the replacement point is moved with the shuttle.
- the mobile section forms part of the transport device to keep the shuttle engaged with the transport device during the second stage of outward transport and the fourth stage of return transport by magnetic interaction with the shuttle magnet.
- a mobile section of the attraction element located at the replacement point is retracted on arrival of the shuttle so that the intensity of the force of magnetic attraction between the magnet and the movable section is very substantially reduced, or even canceled, to allow the transport device to easily separate the shuttle from the guide track.
- the invention also relates to an assembly for implementing the method carried out according to the teachings of the invention, the assembly comprising a conveying device and a transport device, the conveying device comprising:
- a plurality of independent shuttles which each carry at least one gripping member of a hollow body
- each shuttle being in unilateral support against the guide member in an orthogonal support direction direction of travel;
- the conveying device comprises at least one strip of ferromagnetic material which is arranged along at least one section of the conveying path to produce , by magnetic interaction with at least one magnet on board each shuttle, a force of attraction sufficient to maintain the shuttle in permanent support against the guide member in the support direction.
- the transport device comprises a transport support of a shuttle which is slidably mounted relative to a frame of the conveying device along a translation stroke which intersects the conveying path at a replacement point.
- the translation stroke extending along the bearing direction of a shuttle at the replacement point.
- the transport support comprises first fittings which are intended to be fitted with second fitting means of complementary shape. of the shuttle 22 in the direction of translation to occupy a nested state in which the shuttle is carried by the transport support, or which are intended to be uncoupled in a reverse direction to occupy an uncoupled state in which the shuttle is free relative to the transport bracket.
- the transport device comprises an arm which is mounted to slide along the translation stroke between a retracted position and an extended position.
- the transport support being slidably mounted on the arm in the direction of translation along a stroke shorter than the translation stroke between a nesting position with a shuttle and a disengagement position of the shuttle.
- the transport support comprises means for maintaining the shuttle in the nested state.
- the strip of ferromagnetic material comprises a mobile section capable of being moved between an active guidance state in which the mobile section is maintained in the extension of the rest of the strip so that the second magnetic attraction force is transmitted to the support member via the shuttle and an inactive state in which the transmission of the second attraction force to the guide member is substantially interrupted.
- the mobile section is connected in displacement with the transport support along the translation stroke to retain the shuttle in the nested state with the transport support by magnetic attraction during the sliding of the transport support.
- the movable section is mounted to slide relative to the transport support in the direction of translation between a remote release position of the magnet for releasing the shuttle in the direction of disengagement relative to the transport support and a capture position in which the magnet of the shuttle is attracted against the transport support in nested state by magnetic attraction.
- the movable section is slidably mounted on the arm between its release position and its capture position.
- the arm occupies its retracted position
- the transport support occupies its disengaged position
- the mobile section occupies its capture position in which it is in its active state.
- the assembly comprises a store equipped with receptacles movable along a storage circuit, each receptacle being provided with means of reception by interlocking of storage members carried by the shuttles in the direction of translation of the transport support at an exchange point of the storage circuit.
- a shuttle is capable of being nested with the receiving means of a mobile receptacle arranged at the exchange point when the transport support reaches the end of its translation stroke.
- the mobile receptacles are linked to each other to form a closed chain.
- the shuttles are carried by the receptacles so that their magnet is oriented orthogonally towards the outside of the loop formed by the chain closed.
- FIG.1 is a top view which schematically represents a container manufacturing facility comprising a heating station equipped with an assembly produced according to the teachings including a conveying device of the invention and a storage magazine .
- Figure 2 is a side view which shows an example of a preform intended to be supported by the conveyor device of Figure 1.
- FIG.3 is a perspective view which shows a section of the shuttle movement path of the conveyor device of Figure 1 taken in a bend section of the path in which the shuttles are moved by a mechanism of contact training.
- Figure 4 is a vertical cross-sectional view along section plane 4-4 of Figure 1 which shows the shuttle of Figure 3 being moved along the bend section.
- Figure 5 is a top view showing a portion of the contact drive mechanism of Figure 3 having a notch.
- FIG.6 is a perspective view which shows a section of the shuttle movement path of the conveyor device of Figure 1 taken in a straight section of the path along which the shuttles are moved by a linear motor.
- Figure 7 is a vertical cross-sectional view along section plane 7-7 of Figure 1 which shows the shuttle of Figure 6 being moved along the straight section.
- FIG.8 is a perspective view which shows an inner side of a shuttle traveling on the conveyor device of Figure 1.
- Figure 9 is a perspective view which shows one of the receptacles which equips the storage magazine and which is intended to receive a shuttle of the conveying device.
- Figure 10 is a perspective view which shows a section of a closed chain formed of several receptacles identical to that of Figure 9 equipping the storage magazine of Figure 1.
- Figure 11 is a cross-sectional view of a receptacle which represents a reception fork of a shuttle.
- FIG. 12 is a block diagram which represents a method of changing gripping members carried out according to the teachings of the invention.
- Figure 13 is a side view that schematically shows a transport device that equips the conveyor device of Figure 1.
- Figure 14 is a perspective view which shows a point of replacement of the conveyor device and a point of exchange of the storage magazine, the transport device being controlled so as to allow the normal circulation of the shuttles the along their conveyance route.
- Figure 15 is a view similar to that of Figure 14 in which a transport support of the transport device occupies a nested position with a shuttle stopped at the replacement point of the conveying path.
- Figure 16 is a view similar to that of Figure 15 in which the nested shuttle with the transport support is being moved in translation towards the storage magazine.
- Figure 17 is a view similar to that of Figure 16 in which the shuttle is received in a receptacle of the storage magazine at an exchange point.
- Figure 18 is a view similar to that of Figure 17 in which a movable section is controlled in a release position of the shuttle.
- Figure 19 is a view similar to that of Figure 18 in which the transport support is controlled in a disengaged position of the shuttle which is entirely supported by the receptacle.
- Figure 20 is a view similar to that of Figure 19 in which the transport support is nested with another shuttle of the storage magazine.
- Fig. 21 is a view similar to that of Fig. 20 in which the transport bracket has returned the shuttle of Fig. 19 to the replacement point of the conveying path.
- Figure 22 is a view similar to that of Figure 21 in which the transport device is controlled to allow normal movement of the shuttles along the conveying path, the shuttle of Figure 19 being in circulation in the conveying device.
- each shuttle 22 comprising a longitudinal direction "L”, directed from rear to front according to the direction of movement of the shuttles 22 along their conveying path. , a vertical direction “V”, directed from the bottom upwards orthogonally to the plane of movement of the shuttles 22, and a transverse direction “T” which is perpendicular to the two previous directions.
- the transverse direction “T” is oriented from inside the closed loop formed by the conveying path 30 towards the outside of said loop.
- FIG. 1 There is shown in Figure 1 part of an installation 10 for manufacturing large series of containers made of thermoplastic material such as polyethylene terephthalate or PET.
- the manufacturing installation 10 is here intended to form containers from preforms 12 to be heated.
- the manufacturing installation 10 comprises several treatment stations.
- FIG. 1 shows a station 14 for heating preforms 12 and, very schematically, a station 16 for forming, here by blow molding or stretch-blow molding, preforms 12 previously heated by said heating station 14 .
- the manufacturing installation 10 can also include preform decontamination stations 12, or even other treatment stations well known to those skilled in the art for this type of application.
- each preform 12 comprises a tubular body 12A which extends along a main axis "A", shown here vertically.
- the body 12A is open at the top by a neck 12B and closed at the bottom by a bottom 12C.
- the neck 12B of the preform 12 generally already has its final shape. In this respect, the neck 12B is generally maintained at a sufficiently low temperature in the heating station 14 to prevent its deformation during the manufacture of the container.
- the heating station 14 includes at least one heating tunnel 18 .
- the heating station 14 comprises a single heating tunnel 18 .
- such a heating tunnel 18 is delimited by two vertical side walls 18A, 18B. At least one of the walls 18A, 18B is provided with radiation emitters 19 heating the body 12A of the preforms 12.
- the heating tunnel 18 is bordered by a series of adjacent radiation emitters 19, for example two rows of radiation emitters 19 facing each other.
- each radiation emitter 19 is equipped with sources of monochromatic electromagnetic radiation (notably lasers), the emission spectrum of which essentially extends into the infrared range.
- a monochromatic source is an ideal source emitting a single frequency sine wave. In other words, its frequency spectrum consists of a single line of zero spectral width.
- a real source having a frequency emission spectrum which extends over a band of low but non-zero spectral width, centered on a main frequency where the intensity of the radiation is maximum.
- a real source is considered to be monochromatic.
- a multimode source is considered to be monochromatic, that is to say one emitting on a discrete spectrum comprising several narrow bands centered on distinct main frequencies.
- monochromatic radiation is that, well chosen, it can be concentrated on one (or more) frequency(ies) for which (or for which) the thermal behavior of the material of the preforms 12 is, in terms of absorption , particularly interesting.
- the sources with which the radiation emitters 19 are provided are lasers (for example laser diodes) emitting a laser beam in the infrared. These radiation emitters 19 are radiant, that is to say that the radiation emitted is transmitted to the preforms 12 without the air serving as a transmission vector.
- a heating station 14 operating using this technology has many advantages over a conventional oven with halogen lamps. Among other things, in this type of heating station 14:
- the radiation emitters 19 radiate in the infrared without heat diffusion, which, unlike a halogen oven, makes any ventilation unnecessary;
- the preforms 12 can be heated according to more precise thermal profiles
- the length of the heating tunnel 18 and the power of the radiation emitters 19 are adapted so that the preforms 12 emerge heated to a temperature sufficient for their forming by the forming station 16 .
- the invention is also applicable to a heating tunnel whose emitters are formed by halogen lamps emitting heating radiation, for example infrared radiation.
- the duration of heating of the preforms 12 is generally longer than with laser emitters.
- the heating station 14 can therefore comprise two heating tunnels. To save space, these two heating tunnels are usually arranged parallel.
- the heating station 14 also includes a conveying device 20 which is intended to convey each preform 12 along a route which passes through the heating tunnel 18.
- the conveying device 20 is here arranged in the heating station 14 and suitable for conveying preforms 12. It will be understood that such a conveying device 20 can be arranged at other locations of the manufacturing installation 10 and that it can be adapted for conveying hollow bodies in general.
- the conveying device 20 comprises at least one shuttle 22 which embeds at least one member 24 for gripping a preform 12.
- the conveying device 20 preferably comprises a plurality of shuttles 22 in order to be able to rapidly manufacture containers in large series by conveying numerous preforms 12 simultaneously in the heating station 14 .
- the gripping members 24 are removably mounted on the shuttle 22 in order to be able to replace them easily, in particular when changing the format of the preform 12.
- Each gripping member 24 is capable of individually carrying a preform 12.
- Each shuttle 22 is here equipped with a single gripping member 24 .
- each shuttle 22 is capable of conveying a single preform 12.
- each shuttle comprises several gripping members 24, for example two or three, so as to improve the capacity of preforms 12 capable of being handled by the conveying device 20 without increase the number of shuttles 22.
- the gripping members 24 on board the same shuttle 22 can be mounted on an articulated support 25 of the shuttle 22 carried by a shaft 28 to make it possible to reduce the pitch between two preforms during their passage through the heating tunnel 18, as shown in FIG. 8, then to increase this pitch when the preforms pass through other parts of the conveying path 30 by pivoting the shaft 28 by means of a lever 27 cooperating with a cam (not shown).
- the gripping member 24 is here adapted to carry the associated preform 12 upright, neck up or neck down, so that the main axis “A” of the preform 12 extends vertically.
- the gripping member 24 is here formed by a mandrel which is inserted vertically into the neck 12B of the preform 12.
- the mandrel is capable of being inserted axially into the neck 12B of the container with a tight fit for ensuring the gripping of the preform 12 by friction with the internal wall of the neck 12B.
- the gripping member is formed by a mandrel which is capable of gripping the neck of the preform by its external face.
- the gripping member 24 is here also rotatably mounted around the main axis "A" of the preform 12 and/or sliding along said main axis "A".
- the gripping member 24 is for example mounted to slide vertically on a frame 26 of the shuttle 22 between a low gripping position of the preform 12, as shown in Figures 3, 4, 6 and 7, and a high ejection position. of the preform 12 (not shown).
- the sliding is for example controlled by an electric motor or by a cam system (not shown).
- the gripping member 24 is slidably mounted at one end, here at the lower end, of a shaft 28, coaxial with the main axis "A" of the preform 12.
- the gripping member 24 is rotatably mounted on the frame 26 of the shuttle 22 around its axis. Main "A”.
- the gripping member 24 is here integral in rotation with the shaft 28 and the shaft 28 is rotatably mounted on the frame 26 of the shuttle 22.
- the conveying device 20 also comprises means for guiding the shuttle 22 which cooperate by contact with the shuttle 22 to guide it in a direction of movement along a conveying path 30 . All the shuttles 22 pass along said conveying path 30 .
- the conveying path 30 here extends in a horizontal plane.
- the direction of movement of each shuttle 22 is orthogonal to the axis "A" of each preform 12.
- the conveying path 30 here has the form of a closed loop. It comprises a first rectilinear section 30B and a second rectilinear section 30D which are joined by a first section 30A of bend and a second section 30C of bend which are in the form of semicircles.
- the two rectilinear sections 30B, 30D are here parallel.
- the rectilinear sections of the conveying path are not parallel.
- the conveying path may comprise a different number of straight sections and bend sections.
- the radiation emitters 19 are laser emitters 19
- the heating tunnel 18 is arranged on the second rectilinear section 30D.
- the two rectilinear sections of the conveying path each pass through a heating tunnel.
- the conveying path 30 serves here only the heating station 14 .
- the conveying path 30 is divided into at least one magnetic drive section, along which each shuttle 22 is driven in displacement by a linear motor 42, and into at least one section contact drive, along which each shuttle 22 is pushed by physical contact with a motorized push member 56.
- the guide means comprise guide members of the shuttle 22 throughout its conveying path 30 . More particularly, the shuttle 22 is always in unilateral support on at least one guide member in a support direction “S” throughout its conveying path 30 via on-board support members.
- the support direction “S” is orthogonal to the longitudinal displacement direction “L”.
- the term “unilateral” means that the shuttle 22 is in contact with each guide member only in the direction "S” of support, no obstacle opposing the spacing of the shuttle 22 with respect to the member. guiding in a direction opposite to the direction "S" of support.
- the support direction "S" is here orthogonal to the vertical direction and it is directed transversely towards the inside of the closed loop formed by the conveying path 30.
- an inner side of the shuttle 22 is defined as being the side of the shuttle 22 facing the inside of the closed loop formed by the conveying path 30 when the shuttle 22 is circulating on the conveying device 20 . It also defines an outer side of the shuttle 22 which is opposite the inner side.
- first guide means 32 comprise at least one guide rail which is fixedly mounted on a frame 33 of the conveying device 20 .
- the frame 33 which is shown in particular in Figure 14, here rests fixedly on the ground.
- the first guide means 32 here comprise two guide rails 32A, 32B which extend parallel to the conveying path 30 at least over each magnetic drive section.
- the conveying path 30 here comprises two magnetic drive sections which correspond to the two rectilinear sections 30B, 30D of the conveying path 30.
- the guide rails 32A, 32B extend more particularly continuously over the entire length of the conveying path 30.
- the guide rails 32A, 32B are arranged vertically opposite each other.
- the first guide means 32 comprise an upper guide rail 32A and a lower guide rail 32B.
- each guide rail 32A, 32B comprises a track, forming a first guide member 34, which is turned in a direction opposite to the bearing direction "S", here transversely outwards.
- the guide rails 32A, 32B have a sufficiently strong structure to allow stable guidance of the shuttles 22. They thus differ from the various cams (not shown) capable of equipping the heating station 14 and which are only intended the position of the gripping members 24.
- the control cams do not in fact have the necessary properties and are not arranged in a manner suitable for guiding the shuttle 22 along the conveying path 30 .
- the guide rails 32A, 32B are intended to cooperate with first support members 36 fixedly mounted on the frame 26 of the shuttle 22, or around a fixed axis of rotation with respect to the frame 26 of the shuttle. 22 in the case of rolling support members.
- cams cooperate with cam followers movably mounted on the frame 26 of the shuttle 22, for example by sliding or pivoting around an axis remote from the cam follower.
- the first on-board support members 36 are intended to be in permanent contact with the first guide member 34 formed by the track of the guide rails 32A, 32B, at least on a magnetic drive section as will be explained in more detail. afterwards. These are the first rolling support members 36 formed by rollers.
- At least one of the support members cooperating with the track is formed by a pad sliding against the guide rails.
- the shuttle 22 is more particularly in permanent unilateral contact against the first guide member 34 in the support direction "S" via at least one first support member 36 on board, at least on the sections of magnetic drive.
- the shuttle 22 carries at least two first support members 36, each of which rolls on the first guide member 34 formed by the track of an associated guide rail 32A, 32B.
- Said first support members 36 are here formed by rollers which are rotatably mounted around an axis orthogonal to the direction "L” of movement and to the direction "S” of support. The axis of rotation of said rollers is fixed relative to the frame 26 of the shuttle 22.
- the shuttle 22 embarks here four first members 36 of support. Two of the first support members 36 roll on the track, forming the first guide member 34, of one of the guide rails 32A and the other two first support members 36 roll on the track, forming the first guide member 34, on the other side of the guide rails 32B.
- the center of mass "M" of the shuttle 22 is advantageously arranged inside a support polygon formed by the support points of each first support member 36 with the rails 32A, 32B guide.
- the two tracks, forming the first guide member 34, are here arranged in the same vertical plane. They are here turned transversely towards the outside of the closed loop formed by the conveying path 30 .
- Such unilateral guidance in the bearing direction "S" very advantageously makes it possible to reduce the number of components of the conveying device 20 .
- this also makes it possible to simplify the addition or removal of shuttles 22 on the conveying device 20, for example for maintenance needs or for adapting the conveying device 20 to different formats of preforms 12, as will be explained later.
- the shuttle 22 is also guided by permanent contact of at least one first on-board holding member 38 with at least one of the guide rails 32A, 32B in a support direction "G1" orthogonal to the directions "S". and "L” for support and displacement.
- At least one of the guide rails 32A, 32B includes a path 40 for support.
- Support path 40 faces a direction opposite to support direction "G1".
- Each first holding member 38 is here formed by a roller which is rotatably mounted on the frame 26 about a fixed axis orthogonal to the direction "L” of movement and to the direction "G1" of support.
- the support direction "G1" is directed generally vertically in the direction of earth's gravity.
- the first holding member 38 thus makes it possible to hold the shuttle 22 on the guide rails 32A, 32B against gravity.
- the path 40 of support is therefore facing upwards.
- the shuttle 22 is here guided by permanent bilateral contact of at least one first on-board holding member 38 with the guide rails 32A, 32B in the direction of support "G1" and in a direction of support "G2" opposite.
- the shuttle 22 embarks here two first holding members 38, each of which rolls on a path 40 of associated support.
- bilateral means that the shuttle 22 is blocked in movement with respect to the guide rails 32A, 32B in the two opposite directions "G1", "G2" of support.
- the support paths 40 are here orthogonal to the tracks forming the first guide member 34. They are facing away from each other.
- the two support paths are turned facing each other.
- each first holding member 38 to remain permanently in contact with its associated support path 40, at least on the drive section magnetic, while allowing a vertical operating play, at least one of the first holding members 38, for example the first holding member 38 located downwards, is mounted vertically movable with a limited clearance relative to the frame 26, said first holding member 38 being constrained towards the associated support path 40, for example by means of an elastic member (not shown).
- first holding member 38 which opposes the force of gravity is in permanent contact with its associated guide rail, a vertical operating clearance being reserved between the other first holding member 38 and its guide rail. associated guidance.
- a retaining member and a support member 36 are carried by the same roller which has a peripheral groove with a two-sided "V"-shaped section.
- the roller is mounted for rotation on the frame 26 about an axis inclined with respect to the directions "S", "G1, "G2" of support and support, for example with an angle of 58°.
- Each side of the groove is designed to roll on the track forming the first guide member 34, on the one hand, thus forming a support member 36, and on the support path 40 on the other hand, thus forming a support member.
- the same roller makes it possible to guide the movements of the shuttle 22 both in the support direction "S" and in one of the support directions.
- the shuttles 22 are driven along the magnetic drive sections by at least one linear motor 42.
- linear motor 42 has the particular advantage of being able to individually control the movements of each of the shuttles 22 along the magnetic drive section of the conveying path 30 . This is in particular very advantageous for precisely modulating the duration and orientation of the preforms 12 in the tunnel 18 for heating.
- the linear motor 42 includes a magnetic track 44 which is arranged along said magnetic drive section.
- the magnetic track 44 is mounted fixed relative to the frame 33.
- the magnetic track 44 forms a stator comprising a series of windings 46, one of which is shown in FIG. 7, which are distributed along the magnetic track 44.
- Each winding 46 is individually controlled to locally induce a magnetic field independently of the other windings 46.
- the coils 46 are for example controlled by an electronic control unit (not shown) which is programmed appropriately.
- Each shuttle 22 is equipped with at least one permanent magnet 48.
- the magnet 48 is more particularly fixed to the frame 26.
- each coil 46 of the magnetic path 44 interacts with the magnet 48 on board the shuttle 22 to produce, without contact, a first driving force "Fm1", longitudinally oriented, for the movement of the shuttle 22 along the conveying path 30 .
- the magnetic field emitted by the magnetic path 44 also interacts with the magnet 48 to produce a first force "Fa1" of magnetic attraction of the shuttle 22 against the track, forming the first guide member 34, in the direction "S" d support in order to keep the shuttle 22 bearing against the track, forming the first guide member 34, of the rails 32A, 32B during its movement along the magnetic drive section.
- the magnetic track 44 thus forms a first element of attraction for the shuttle 22.
- the pitch between two coils 46 is small enough to allow the coils 46 of the magnetic path 44 to be controlled so as to cause the movement of each shuttle 22 independently of the other shuttles 22.
- this technology implemented in the context of the invention makes it possible to move all the shuttles 22 in line in the same direction of movement along the magnetic drive section of the conveying path 30, here in a counterclockwise direction.
- the speed of movement of each shuttle 22 can be controlled individually by an electronic control unit (not shown).
- the magnetic track 44 is arranged in such a way that a space is permanently reserved between the magnet 48 and the magnetic track 44 in the support direction "S", here the transverse direction.
- the width of this space in the bearing direction “S” will subsequently be called air gap "e1".
- This air gap "e1” has a sufficiently low value for the first attraction force "Fa1” to permanently present an intensity, called capture intensity, sufficient to firmly press the support members 36 against the tracks, forming the first member 34 guide rails 32A, 32B and guide for the first force "Fm1" drive is sufficient to move the shuttle 22 along the path 30 of conveying.
- the air gap "e1” is for example less than or equal to 1.5 mm.
- the intensity of capture of the first force "Fa1" of attraction is for example greater than or equal to 232 N.
- the magnetic track 44 is arranged between the two guide rails 32A, 32B in the directions “G1”, “G2” of support.
- the two parallel guide rails 32A, 32B extend here on either side of the magnetic track 44 in the vertical direction.
- This arrangement makes it possible to guarantee that the shuttle 22 remains in permanent contact with the tracks forming the first guide members 34 .
- Such a linear motor 42 is nevertheless very expensive to produce. It is therefore very advantageous to produce a conveying device 20 with hybrid motorization in which the advantages of the linear motor 42 are used, for example for the displacement of the preforms 12 in the heating tunnel 18, while for the sections of the path 30 of conveyors where these advantages are not required, a contact drive mechanism 50 takes over from the linear motor 42 to move the shuttles 22 along the conveying path 30.
- an input zone "Z1" and an output zone Z2" of the preforms 12 of the heating station 14 require that the preforms 12 be transmitted between a wheel 52 d input and the conveying device 20 with a determined pitch, or even that the preforms 12 are transmitted between the conveying device 20 and an output wheel 54 with a determined pitch.
- the use of a contact drive mechanism 50 is particularly suitable.
- the conveying device 20 represented in FIG. 1 thus has two rectilinear magnetic drive sections which correspond to the rectilinear sections 30B, 30D of the conveying path 30, while the turning sections 30A, 30C of the conveying path 30 correspond to contact training sections.
- the conveying device 20 thus comprises at least one mechanism 50 for driving each shuttle 22 by contact along at least one contact driving section of the path 30 conveying.
- the conveying device 20 comprises two contact drive sections which correspond to the sections 30A, 30C of turn of the path 30 conveying.
- the contact drive mechanism 50 includes at least one movable thrust member 56 which produces a second driving force "Fm2" by contact pushing the shuttle 22 along the contact drive section of the conveying path 30.
- the mechanism 50 for driving by contact of each section 30A, 30C of bend comprises at least one motorized wheel 50A, 50B whose axis of rotation vertical is fixed with respect to the frame 33.
- the axis of rotation is positioned at the center of gyration of the section 30A, 30C associated turn.
- the thrust members 56 are mounted integral in rotation on the periphery of the motorized wheel 50A, 50B.
- the mechanism 50 for driving each section 30A, 30C of contact by contact is formed by two coaxial motorized wheels 50A, 50B which jointly turn around the 'rotation axis.
- the two wheels 50A, 50B are, for example, driven in rotation by the same motor (not shown).
- the two motorized wheels 50A, 50B are arranged one above the other. As shown in Figure 4, they are located vertically on either side of the frame 26 of the shuttle 22 to produce a balanced thrust on each shuttle 22.
- the thrust members 56 are arranged at the periphery of each motorized wheel 50A, 50B so that each thrust member 56 of one motorized wheel 50A coincides with a thrust member 56 of the other motorized wheel 50B so that the members 56 thrust of the two motorized wheels 50A, 50B come into engagement simultaneously with a shuttle 22.
- the thrust members 56 are here formed by substantially radial edges of notches 58 which cooperate by meshing with at least one member 60 for complementary input of each shuttle 22.
- the notches 58 are here made in the peripheral edge of each motorized wheel 50A, 50B.
- each thrust member is formed by faces which radiate radially with respect to the axis of rotation of the wheel and which come into contact with a face facing the shuttle. to push it.
- Each shuttle 22 here comprises two gripping members 60 to cooperate with each of the motorized wheels 50A, 50B.
- the gripping members 60 are here fixed on a section of the shaft 28.
- Each gripping member 60 is here formed by a ring 60A, 60B having an annular groove on an outer face which meshes with the associated thrust member 56 .
- the rings 60A, 60B are thus coaxial along a vertical axis.
- the pitch between two shuttles 22 can be different on each contact drive section.
- the shuttles 22 are closer to each other on the first bend section 30A than on the second bend section 30C.
- the conveying device 20 here comprises second guide means which comprise at least one wheel 50A, 50B and the gripping members 60 .
- the wheels 50A, 50B thus make it possible to guide the shuttle 22 at least in the support direction "G1" by contact with the gripping members 60.
- the thrust members 56 make it possible to guide the shuttle 22 at least in the two directions "G1", “G2" of opposite support by contact with the members 60 for gripping.
- at least the upper ring 60A has two flanges, forming second holding members 62, which vertically delimit a groove in which each notch 58 is received.
- the movements of the shuttle 22 are limited vertically in both directions by contact between each edge of the upper ring 60A and an upper face 64, respectively a lower face 66, of the wheel 50A, 50B.
- each wheel 50A, 50B thus form support members.
- each shuttle 22 can in particular rest on the upper face 64 of the wheels 50A, 50B against gravity.
- the second holding members 62 thus take over from the first holding members 38 to retain the shuttle 22 on the conveying path 30 against gravity.
- the maintenance of the shuttles along the drive sections by contact remains achieved by contact between the first retaining members and the paths 40 for supporting the rails.
- the shuttle 22 is guided along the conveying path 30 by unilateral contact of the groove of the gripping members 60, forming a second support member 68, against a bottom of the notch 58, forming a second guide member 70, in the direction "S" of support.
- the rings 60A, 60B are in unilateral support in the "S" direction of support against the bottom of the notches 58.
- the notches 58 are designed so that the first support members 36 are slightly detached from the track forming the first guide member 34.
- the shuttle 22 is here capable of pivoting around the axis "A" relative to the thrust members 56.
- the movement in pivoting around the axis "A” is limited in both directions by contact between the first support members 36 and the track forming the first guide member 34.
- the shuttle 22 is guided along the conveying path 30 by unilateral contact of the first support members 36 against the track forming the first guide member 34 in the direction " S" support in the same way as on the magnetic drive section (see figure 7).
- the bottom of the notches 58 is arranged so as to be separated from the ring 60A, 60B in the support direction "S" to allow the shuttles 22 to rest on the guide rails 32A, 32B only by the first bodies 36 support.
- the contact drive section is formed by a straight section.
- the contact drive mechanism then comprises a chain equipped with thrust members.
- the chain is arranged around guide wheels, at least one of which is motorized, so that a section of the chain extends along said rectilinear section of the conveying path.
- all the shuttles are driven by contact over the entire conveying path.
- the shuttles 22 are here supported unilaterally in the direction "S" of support over the entire length of the conveying path 30 against one or the other of the members 34, 70 of guidance.
- Such a design is much more advantageous than a conveying device in which the shuttles 22 are guided by bilateral contact in the support direction "S".
- Such bilateral guidance would require a counterrail which would extend over at least part of the length of the conveying path 30 to retain the shuttles 22 likely to deviate from the track, forming the first guide member 34, in a direction opposite to the direction "S" of support.
- the shuttle 22 would inevitably be mounted with an operating clearance between such a safety rail and the first guide member 34.
- the shuttle 22 would therefore be capable of moving in the support direction "S", which would make the movement unstable. This would therefore make it necessary to provide additional elastically movable members, which would increase the manufacturing cost of the conveying device 20 .
- the unilateral guidance in the support direction "S" makes it possible to add or remove shuttles 22 very easily, as will be explained later. It is therefore preferable to keep at least one section of the conveying path 30 free of check rails. It is nevertheless possible to provide a safety rail which extends away from the shuttle 22 over a part of the conveying path 30 solely to prevent the shuttle 22 from falling from the guide rails 32A, 32B in the event of separation of the track forming the first guide member 34.
- the invention proposes to embed at least one magnet 48 on each shuttle 22.
- This is a permanent magnet 48, as shown in particular in Figures 3 and 4.
- the magnet 48 can be made in one piece or by assembling several elementary magnets.
- At least one strip 72 of ferromagnetic material is fixed to the frame 33 along the contact drive section to produce, by magnetic interaction with the magnet 48 carried by each shuttle 22, a second force "Fa2" of attraction whose intensity, called capture intensity, is sufficient to maintain the shuttle 22 in support, via its support members 36 or 68 against the guide members 34 or 70 in the direction "S" of support.
- the second attraction force “Fa2” thus makes it possible to retain the gripping members 60 in engagement with the pushing members 56 throughout the corresponding contact drive section.
- the strip 72 of ferromagnetic material thus forms a second magnetic attraction element of the shuttle 22.
- the strip 72 of magnetic material is made of a ferromagnetic material which can be magnetized, also called hard ferromagnetic material, or non-magnetic, also called soft ferromagnetic material.
- the strip 72 of ferromagnetic material here extends continuously along the contact drive section.
- the strip 72 of ferromagnetic material is fixed relative to the guide rails 32A, 32B, and therefore relative to the frame 33.
- the strip 72 of ferromagnetic material can be made in one piece or in several pieces which are fixed to each other so as to form a strip 72 of ferromagnetic material making it possible to maintain the intensity of capture of the second force "Fa2" of substantially constant and continuous attraction all along the strip 72. It is in particular possible to reserve a longitudinal clearance (not shown), for example for mounting or for expansion, between two parts forming the ferromagnetic strip 72 as long as this clearance is narrow enough to maintain substantially constant the intensity of capture of the second force "Fa2" of magnetic attraction during the passage of the shuttle 22 in line with this clearance.
- the magnet 48 is here arranged on the frame 26 of the shuttle 22 opposite the strip 72 of ferromagnetic material in the bearing direction "S". More particularly, one of the magnetic poles of the magnet 48 is turned towards the strip 72 of ferromagnetic material in the bearing direction "S". Thus, the magnetic axis of the magnet 48 is aligned with the direction "S" of support. In the example shown in the figures, one of the magnetic poles of the magnet 48 is arranged transversely opposite the strip 72 of ferromagnetic material.
- the strip 72 of ferromagnetic material is arranged so that a space is permanently reserved between the magnet 48 and the strip 72 of ferromagnetic material in the support direction "S", here the transverse direction.
- the magnet 48 here has a flat vertical face arranged opposite the strip 72 of ferromagnetic material, while the strip 72 of ferromagnetic material here has a concave curvature in a horizontal plane. Therefore, the shortest distance along the bearing direction “S” between the magnet 48 and the strip 72 of ferromagnetic material will be called “air gap” hereinafter “e2”.
- This gap “e2” has a sufficiently low value for the intensity of capture of the second force "Fa2” of attraction to be permanently sufficient to press the support members 36, 68 firmly against the guide members 34, 70 .
- the gap “e2” is for example less than or equal to 2 mm.
- the magnet 48, the thickness of the strip 72 of ferromagnetic material and the air gap “e2" are selected so that the intensity of capture of the second force "Fa2" of attraction is for example greater than or equal to 232 N throughout the corresponding contact training section.
- the thickness of the strip 72 of ferromagnetic material is for example greater than or equal to 5 mm.
- the strip 72 of ferromagnetic material is arranged vertically between the two support members 36, 68.
- the two motorized wheels 50A, 50B extend on either side of the strip 72 of ferromagnetic material in the vertical direction "V".
- This arrangement makes it possible to guarantee that the support members 36, 68 of the shuttle 22 remain in permanent contact with the guide members 70 at least over the entire contact drive section. This makes it possible in particular to prevent the shuttle 22 from coming into contact with the safety rail, when the conveying device 20 is equipped with it, or even to completely dispense with such a safety rail, as is the case in the examples shown in the figures.
- the magnetic channel 44 is advantageously arranged in the extension of the strip 72 of ferromagnetic material.
- the same magnet 48 is used to produce the second attraction force "Fa2" on the contact drive sections and to produce the first attraction force "Fa1" on the magnetic drive sections.
- the conveying device 20 comprises four transition zones 74A, 74B, 74C, 74D between a contact drive section and a magnetic drive section.
- the shuttle 22 is engaged with the thrust members 56 to produce the second driving force "Fm2" while it is still facing the track.
- 44 magnetic which provides the first force "Fa1” of attraction to the shuttle 22.
- each shuttle 22 is attracted in the direction "S” of support by the way 44 magnetic.
- These transition zones 74A, 74B, 74C, 74D are very short compared to the length of each section of the conveying path 30 .
- the preforms 12 are routed to the entry zone "Z1" of the conveying device 20 which is arranged in the first bend section 30A.
- the preforms 12 are here conveyed by means of the input wheel 52 which brings the preforms 12 in line with a determined spacing pitch.
- the shuttles 22 are driven by the contact drive mechanism 50, being spaced apart by a pitch suitable for loading the preforms 12 onto the gripping members 24 . This step is fixed by the circumferential spacing between two successive thrust members 56 . Then, the preforms 12 thus loaded are conveyed by the shuttles 22 along the first rectilinear section 30B thanks to the linear motor 42.
- the motorized wheels 50A, 50B of the contact drive mechanism 50 of the second bend section 30C can rotate at a different speed from that of the motorized wheels 50A, 50B of the first bend section 30A, for example faster.
- the shuttles 22 are then again driven by a linear motor 42 along the second rectilinear section 30D, so that the preforms 12 pass through the tunnel 18 for heating.
- the speed of the shuttles 22 is adapted so that the quantity of preform 12 contained in the heating tunnel 18 is substantially maximum. In addition, the speed is adapted so that the heating of the body 12A of the preforms 12 is optimal.
- the shuttles 22 then return to the first bend section 30A at the start of which the exit zone "Z2" is located.
- the shuttles 22 are separated by the same pitch as at the start of the cycle.
- the preforms 12 are thus spaced apart by a suitable pitch to allow their transfer to the output wheel 54 which grasps them in order to be able to transport the preforms 12 thus heated in line to the forming station 16 .
- a store 76 for storing shuttles 22 for storing shuttles 22.
- This store 76 has, for example, the purpose of storing a number of replacement shuttles 22 at least sufficient to replace all of them.
- the replacement shuttles 22 are identical to the shuttles 22 in service. This makes it possible, for example, to reduce the downtime of the conveying device 20 when a change in hollow body format is planned. It is in fact possible to equip the replacement shuttles 22 stored in the store 76 with replacement gripping members 24 adapted for a new format of hollow body, while the conveying device 20 continues to operate with the shuttles 22 in service equipped with current grippers 24 adapted to the previous hollow body format. Thus, the change of gripping members 24 can be carried out in masked time.
- the method thus consists in replacing the shuttles 22 in service equipped with the current gripping members 24 by replacement shuttles 22 equipped with replacement gripping members 24 .
- the magazine 76 comprises receptacles 77 of the shuttle 22 which are movably mounted along a circuit 78 for storage.
- the storage circuit 78 of the store 76 is independent of the conveying path 30. This means that the storage circuit 78 is not connected with the conveying path 30 so that a transport device 80 must be used to transfer the shuttles 22 between the store 76 and the conveying device 20 .
- Such a transport device 80 will be described in more detail below.
- the storage circuit 78 here has the form of a closed loop.
- the loop of the storage circuit 78 extends substantially in the same plane as the conveying path 30, here a horizontal plane.
- the receptacles 77 are linked to each other by hinges 82 to form a closed chain 84, of which only a section is shown in Figure 10.
- This chain 84 is meshed around at least two 86 toothed wheels. At least one of the toothed wheels 86 is driven so as to be able to drive the chain 84 to move the receptacles 77 along the circuit 78 for storage.
- the storage circuit 78 of the store 76 comprises at least one fixed exchange point "P2" with respect to the frame 33 by which the shuttles 22 are intended to leave the store 76 towards the conveying device 20 and/or to enter the store 76 from the conveying device 20. All the receptacles 77 pass one after the other through the exchange point "P2" during a complete turn of the chain 84.
- the exchange point "P2" corresponds to a determined position of a receptacle 77 along the circuit 78 of storage.
- the conveying path 30 of the conveying device 20 comprises at least one replacement point "P1" fixed relative to the frame 33 by which the shuttles 22 are intended to be output to the store 76 or received from the store 76.
- the replacement point "P1" is arranged near the exchange point “P2" of the store 76. All the shuttles 22 pass one after the other by the replacement point "R during their movement along the path Conveying 30.
- the replacement point "P1" corresponds to a determined position of a shuttle 22 along the storage circuit 78.
- the shuttles 22 move parallel to the receptacles 77 passing through the exchange point "P2".
- the replacement point "RG" is arranged transversely at a distance opposite the exchange point "P2" in the direction of movement of the shuttles 22 along the conveying path 30 .
- each receptacle 77 is here provided with means for receiving by interlocking storage members carried by the shuttles 22.
- the shuttles 22 are thus capable of being fitted transversely with the receiving means with respect to the direction of movement of the receptacles 77 along the circuit 78 of storage.
- Each shuttle 22 is more particularly capable of being nested with the receiving means when its outer side is turned towards the receiving means, by rectilinear translation in the transverse direction.
- the shuttles 22 are carried by the receptacles 77 so that their magnet 48 is oriented orthogonally towards the outside of the loop formed by the chain 84.
- the receiving means are here formed by forks 88 aligned vertically.
- Each fork 88 has two parallel branches 90 which extend transversely from a bottom.
- the branches 90 are arranged in the same horizontal plane.
- a free end of the branches 90 delimits an opening 92.
- Each fork 88 is capable of receiving a ring 60A, 60B carried by the shaft 28 of the shuttle 22 in the transverse fitting direction. These are 60A rings, 60B forming the members 60 for gripping the shuttle 22. At least one upper ring 60A has a rim, forming the holding member 62, further allowing the weight of the shuttle 22 to rest on the associated fork 88.
- the receptacle 77 also includes a third fork 88 arranged vertically between the two end forks 88. This third fork 88 is intended to receive the shaft 28.
- Each receptacle 77 further comprises at least one member 94 for retaining a shuttle 22 fitted into the forks 88.
- the retaining member 94 is here movably mounted in a branch 90 of a fork 88 between a locking position in which it is extended longitudinally across the opening 92 of the fork 88, to prevent the passage of the ring 60A, 60B through the opening 92, and an unlocking position in which it is retracted in the branch 90 to allow the passage of the ring 60A, 60B through the opening 92.
- the retention member 94 is here elastically returned to its locking position. To this end, the retention member 94 is received in a housing 96 complementary to the branch 90, with the interposition of an elastic member 98, such as a spring, between the retention member 94 and a face of the housing 96 .
- an elastic member 98 such as a spring
- the retention member 94 advantageously comprises ramps 100 making it possible to force its passage into the unlocked position by contact with the ring 60A, 60B of the shuttle 22 in the engagement direction and in an opposite disengagement direction when a sufficient force is applied by the shuttle 22 on the member 94 of retention.
- the retention member 94 is for example formed by a ball.
- Such an assembly comprising the conveying device 20, provided with at least one linear motor 42, and a magazine 76, in which the shuttles 22 are supported by a chain 84 of mobile receptacles 77 and not by a linear motor 42, makes it possible to take advantage of the advantages of the linear motor 42 for the conveying device 20, while making it possible to produce a store 76 that is less expensive than a siding equipped with a linear motor.
- the assembly comprising the conveying device 20 and the magazine 76 thus arranged makes it possible to apply a method for changing gripping member 24, illustrated in FIG.
- a third step "E3" of gripping another shuttle 22 equipped with a new gripping member 24 in the magazine 76 is carried out.
- the chain 84 of the store 76 is moved so as to bring a receptacle 77 equipped with a replacement shuttle 22 to the exchange point “P2”.
- a fourth stage “E4” of return transport of the shuttle 22 replacement from the store 76 to the guide member 70 is made.
- the receptacles 77 equipped with a replacement shuttle 22 are arranged alternately with empty receptacles 77 ready to receive a current shuttle 22.
- each shuttle 22 Due to the arrangement transversely opposite the point "P2" of exchange and the point "P1" of replacement, and due to the interlocking of each shuttle 22 by its outer side with a receptacle 77 associated , during the steps ⁇ 2, E4" of outward and return transport, each shuttle 22 is moved only in rectilinear translation. More particularly, each shuttle 22 is moved in translation in a transverse direction of translation, parallel to the direction "S" of support of the shuttle 22 on the guide member 70 located at the replacement point "P1".
- This arrangement is particularly advantageous because it makes it possible to automate in a very simple and inexpensive manner the transport of the shuttles 22 between the replacement point "P1" and the exchange point "P2".
- the transport device 80 an example of which is shown schematically in Figure 13, is provided to automate the transport of the shuttles 22 between the replacement point "RG” and the exchange point "P2", shown in Figure 13.
- the transport device 80 comprises a support 102 for transporting a shuttle 22 which is mounted to slide only in the direction of translation relative to the frame 33.
- the support 102 is in particular mounted to slide along a stroke 103 of determined translation, shown in Figure 1.
- the translation stroke 103 of the transport support 102 intersects the conveying path 30 at the point "P1" of replacement.
- the support 102 of transport passes through an intermediate position for entering a shuttle 22 which coincides with the intersection of its stroke 103 of translation with the path 30 of conveying.
- the outer end of the translation race 103 of the transport support 102 is arranged in the storage circuit 78 in the immediate vicinity of the exchange point "P2".
- the transport support 102 conveys a shuttle 22 to the exchange point "P2" of the storage circuit 78.
- the transport support 102 is here mounted on an arm 104 whose main axis extends in the direction of translation.
- the arm 104 is slidably mounted in a slide 106 in the direction of translation.
- the arm 104 is for example slidably mounted in the slide 106 via rollers.
- the rollers are here rotatably mounted on the slide 106 and they cooperate with the lateral grooves of the arm 104.
- the slide 106 is mounted fixed with respect to the frame 33 of the device 20 for conveying.
- the arm 104 is thus movable in translation along the direction of translation between a retracted position, illustrated in FIGS. 14, 15, 21 and 22, in which the transport support 102 is arranged inside the closed loop formed by the path 30 for conveying, and an extended position, illustrated in FIGS. 17 to 20, in which the support 102 for conveying is arranged outside the closed loop formed by the path 30 for conveying.
- the retracted position and the extended position here form extreme positions in which the sliding of the arm 104 is stopped by stops (not shown).
- the arm 104 is here slidably controlled by means of a transport cylinder 108, one inner end of which is linked to the frame 33 of the conveying device 20, and the second end of which is linked to the arm 104.
- the transport support 102 comprises first interlocking means which are intended to be interlocked with second interlocking means of complementary shape to the shuttle 22 in the direction of translation to occupy a nested state in which the shuttle 22 is carried by the transport support 102, or which are intended to be uncoupled in a reverse direction to occupy an uncoupled state in which the shuttle 22 is free with respect to the transport support 102.
- the transport support 102 more particularly comes into contact with the shuttle 22 by its inner side. When the transport support 102 is fitted with the shuttle 22, the shuttle 22 is in abutment transversely, here by its frame 26, against a face 112A, 112B of abutment of the support 102 for transport.
- the first interlocking means of the transport support 102 here comprise a pin 110.
- the pin 110 extends transversely outwards from a first abutment face 112A of the transport support 102.
- the pin 110 is intended to be received in a complementary orifice 114 made in an inner face of the frame 26 of the shuttle 22.
- the orifice 114 is here arranged vertically above the magnet 48, as shown in Figure 8.
- the transport support 102 also includes a second abutment face 112B.
- the two abutment faces 112A, 112B bear transversely against the frame 26 of the shuttle 22, vertically on either side of the magnet 48, when the pin 110 is fitted into the orifice 114 of the shuttle 22.
- the engagement position and the disengagement position are here extreme positions in which the sliding of the transport support 102 is stopped, for example by physical stops (not shown).
- the movements of the transport support 102 relative to the arm 104 are here controlled by means of a gripping cylinder 116 on board the arm 104.
- the gripping cylinder 116 has a stroke much shorter than the stroke 103 of translation of the arm 104 .
- This arrangement makes it possible in particular to independently control the transport cylinder 108 and the input cylinder 116 in "all or nothing", that is to say over their entire respective stroke, without intermediate stop between their two extreme positions.
- the replacement point "P1" is located on a mechanical drive section of the conveying path.
- each shuttle 22 is held against the guide members 34 and/or 70 by the second force "Fa2" of magnetic attraction exerted by interaction between the magnet 48 and the strip 72 of ferromagnetic material.
- the capture intensity of this second force "Fa2" of magnetic attraction is very high, for example greater than or equal to 232 N.
- the transport support 102 when the transport support 102 is intended to cross a space occupied by the strip 72 of ferromagnetic material, as is the case here, the strip 72 of ferromagnetic material is likely to interfere with the movements of the support 102 from transportation.
- the strip 72 of ferromagnetic material to comprise a movable section 118 which is independent of the rest of the ferromagnetic strip 72.
- the movable section 118 is arranged at the replacement point "P1" of the conveying path 30.
- the mobile section 118 is capable of being moved between an active guidance state in which the mobile section 118 is maintained in the extension of the rest of the strip 72 so that the intensity of capture of the second force "Fa2" of attraction magnetic is transmitted to the second guide member 70 via the shuttle 22 and an inactive state in which the transmission of the second attraction force "Fa2" to the guide member 70 is substantially interrupted.
- the mobile section 118 frees a passage in the strip 72 of ferromagnetic material for the support 102 for transport.
- the transport device 80 further comprises means for holding the shuttle 22 nested with the support 102 for transport.
- the mobile section 118 is carried by the arm 104 of the device 80 for transport.
- the arm 104 occupies its retracted position
- the mobile section 118 is maintained in its active guiding state.
- the movable section 118 is carried by the arm 104, so that it is not necessary for the transport device 80 to apply a force to overcome the second force "Fa2". magnetic attraction in order to deviate the shuttle 22 from the conveying path. In this case, it will nevertheless always be necessary to move the movable section 118 of the shuttle 22 aside before it is taken over by the associated receptacle 77 of the store 76.
- This configuration makes it possible to provide a simple and inexpensive means of carrying out the spacing of the mobile section 118 with respect to the shuttle 22.
- This embodiment also makes it possible to use the mobile section 118 on board the transport support 102 as a means of holding the shuttle 22 fitted onto the transport support 102 by magnetic attraction during the sliding of the arm 104 between its positions. retracted and extended.
- the latter is slidably mounted on the arm 104 in the direction of translation between a release position at a distance from the magnet 48, in which the intensity of the second magnetic attraction force "Fa2" applied to the shuttle 22 becomes negligible, or even zero, thus making it possible to releasing the shuttle 22 in the disengagement direction with respect to the transport support 102, and a capture position in which the shuttle 22 is attracted by the magnet 48 against the transport support 102 to keep it nested by the second force "Fa2 " of magnetic attraction presenting its capture intensity.
- the intensity of the second force "Fa2" of magnetic attraction is inversely proportional to the square of the distance between the mobile section 118 and the magnet 48.
- the intensity of this force "Fa2” therefore very rapidly becomes negligible. It is therefore not necessary to deviate the movable section 118 a great distance from the shuttle 22 to release the latter from its influence.
- the travel between the release position and the capture position is for example of the order of only a few centimeters.
- the release position and the capture position are here extreme positions in which the sliding of the movable section 118 is stopped, for example by physical stops (not shown).
- the air gap "e2" determined previously is reserved between the mobile section 118 and the magnet 48 of the shuttle 22, so that the second force “Fa2” of magnetic attraction is here used to hold the shuttle 22 relative to the transport support 102 and no longer to hold the shuttle 22 bearing against the guide members 70 .
- the movable section 118 is here controlled between its two positions by means of a capture jack 120 on board the arm 104.
- the movable section 118 is independent of the transport support 102 of the transport device 80.
- the movable section 118 can pass into its inactive state, for example by being retracted laterally or vertically, before the shuttle 22 reaches the replacement point "P1".
- the shuttle 22 is only subjected to a second force "Fa2" of magnetic attraction, the intensity of which is very reduced, or even zero, when it arrives at the replacement point "P1".
- the means for keeping the shuttle 22 nested are for example formed by a locking bolt mounted in the transport support 102 and controlled between a locking position and an unlocking position.
- the conveying device 20 is equipped with shuttles 22, known as current shuttles 22, which are equipped with gripping members 24 adapted to the format of the preforms 12 in use.
- the magazine 76 is equipped with shuttles 22, called replacement shuttles 22, which are equipped with gripping members 24 adapted to the next format of the preforms 12 which is different from the format of the preforms 12 in use.
- the arm 104 of the transport device 80 is in the retracted position, the transport support 102 is in the disengaged position and the mobile section 118 is in the capture position.
- the mobile section 110 is thus in its active state.
- the transport device 80 does not interfere with the circulation of the shuttles 22 along the conveying path 30 as illustrated in FIG. stored in the store 76 are equipped with replacement gripping members 24 .
- the conveying device 20 can continue to operate normally with the current shuttles 22 so that the installation 10 continues to manufacture the container from the preforms 12 of the current format.
- each current shuttle 22 circulating on the conveying device 20 is automatically replaced by a shuttle 22 of replacement stored in the store 76 and equipped with a member 24 for gripping replacement.
- the current shuttles 22 are successively replaced as they pass through the replacement point “R” of the conveying path 30. The process is repeated for each current shuttle 22.
- a first extraction step ⁇ 1" is triggered when a current shuttle 22 arrives at the replacement point "P1".
- the current shuttle 22 is immobilized at the replacement point "P1" on time to be taken over by the transport device 80.
- the transport support 102 is slid relative to the arm 104 towards its interlocking position so as to interlock with the complementary orifice 114 of the current shuttle 22, as illustrated in FIG. 15.
- the movable section 118 still occupies its capture position in which it applies the second force "Fa2" of magnetic attraction which makes it possible to press the current shuttle 22 against the faces 112A, 112B abutment of the transport support 102.
- the current shuttle 22 is thus kept fitted with the transport support 102. At this stage, the current shuttle 22 is still resting against the guide member 70 in the direction "S" of support.
- the breaking operation here consists of temporarily detaching the mobile section 118 of the attraction element located in the replacement zone with respect to the rest of the attraction element. The mobile section 118 thus passes into its inactive state.
- the current shuttle 22 is moved away from the guide member 70, here from the notches 58 of the motorized wheels 50A, 50B, and transported to the exchange point "P2" of the magazine 76 independent of the conveying path 30 by the device 80 transport, as shown in Figure 16.
- the arm 104 is slidably controlled towards its extended position by carrying the current shuttle 22, the transport support 102 remains in its nested position and the mobile section 118 remains in its capture position.
- the movable section 118 thus makes it possible to maintain the current shuttle 22 in the nested state during its translation.
- the mobile section 118 is thus transported by the transport device 80 at the same time as the current shuttle 22 during the outward transport stage ⁇ 2′′.
- the mobile section 118 thus forms part of the transport device 80 to maintain the current shuttle 22 in engagement with transport device 80 during outward transport step "E2" by magnetic interaction with magnet 48 of current shuttle 22.
- step "E2" comprises an operation for releasing the current shuttle 22, the mobile section 118 is controlled in the release position relative to the arm 104, as illustrated in FIG. 18.
- the current shuttle 22 is retained in the receptacle 77 by the abutment faces 112A, 112B of the transport support 102 in its nested position.
- the current shuttle 22 is then substantially no longer subject to the second force “Fa2” of magnetic attraction.
- the transport support 102 is controlled in its uncoupled position to allow the current shuttle 22 to be released from the transport device 80, as shown in FIG. 19.
- the current shuttle 22 is then completely supported by the receptacle 77 by being nested in the forks 88 and maintained in this state by the retention member 94 in its retention position.
- the chain 84 of receptacles 77 is then turned, as indicated by the arrow "R" in FIG. 20, so as to take away the current shuttle 22 provided with the current gripper member 24 and so as to bring a replacement shuttle 22 provided with a replacement gripping member 24 at the point "P2" of exchange.
- the arm 104 of the transport device 80 remains in its extended position.
- the replacement shuttle 22 is routed to the exchange point "P2" of the magazine 76 after the current shuttle 22 has been deposited in the receptacle 77.
- the transport support 102 is controlled towards its interlocking position so as to come s fit with the replacement shuttle 22.
- the movable section 118 is also controlled towards its capture position to allow the maintenance of the replacement shuttle 22 in this nested position, as illustrated in Figure 20.
- the arm 104 is controlled towards its retracted position. In doing so, the replacement shuttle 22 is translated to the replacement point "P1" until it presses against the guide members 70, as shown in FIG. 21.
- the transport support 102 is then controlled in its disengaged position while the movable section 118 remains in its capture position so as to return to its active state in which the second force "Fa2" of magnetic attraction of the shuttle 22 against the guide members 70.
- the replacement shuttle 22 is set in motion along the conveying path 30 to release the replacement point "P1" as illustrated in FIG. 22, the movable section 118 remaining in its active state until the next iteration of the method. .
- the mobile section 118 is retracted before the arrival of the shuttle 22 to be replaced in the replacement zone so that the second force "Fa2" of attraction between the magnet 48 and the mobile section 118 is very substantially reduced, or even canceled, to allow the transport device 80 to easily move the shuttle 22 away from the track forming the first guide member 34 .
- the rest of the method remains identical, the locking means being controlled in an appropriate manner to hold the shuttles 22 during their transport and to release them on their arrival at the point "P2" of exchange and at the point "P1" of replacement.
- this method and the associated assembly are very easy and inexpensive to implement. This is notably due to a magazine 76 comprising a mechanical chain 84 which is inexpensive to produce and to the use of a transport device 80 making it possible to simply move the shuttles 22 in translation. Such a transport device 80 is in particular much less expensive and easier to use than a robotic manipulator designed to move the shuttles 22 according to six degrees of freedom.
- the conveying device 20 is particularly suitable for conveying preforms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Specific Conveyance Elements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2107465A FR3125029B1 (fr) | 2021-07-09 | 2021-07-09 | Procede de changement d'organes de prehension dans un dispositif de convoyage de corps creux |
| PCT/EP2022/069185 WO2023281102A1 (fr) | 2021-07-09 | 2022-07-08 | Procede de changement d'organes de prehension dans un dispositif de convoyage de corps creux |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4367047A1 true EP4367047A1 (fr) | 2024-05-15 |
Family
ID=78212192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22740921.6A Pending EP4367047A1 (fr) | 2021-07-09 | 2022-07-08 | Procede de changement d'organes de prehension dans un dispositif de convoyage de corps creux |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4367047A1 (fr) |
| FR (1) | FR3125029B1 (fr) |
| WO (1) | WO2023281102A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3131288B1 (fr) * | 2021-12-29 | 2023-12-29 | Sidel Participations | Procede de remplacements d'organes de prehension de preformes et installation de convoyage associee |
| EP4650306A1 (fr) * | 2024-05-06 | 2025-11-19 | Ats Corporation | Dispositif de déviation de navette pour un système de transporteur à moteur linéaire |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITVR20130070A1 (it) * | 2013-03-22 | 2014-09-23 | Sacmi Imola Sc | Apparecchiatura per la realizzazione di contenitori in plastica |
| DE102013109174B4 (de) * | 2013-08-23 | 2025-10-30 | Krones Ag | Vorrichtung zum Erwärmen von Kunststoffvorformlingen, Haltevorrichtung für Halteelemente zum Halten von Kunststoffbehältnissen und Verfahren zum Montieren oder Demontieren von Halteelementen und Abschirmelementen |
| DE102016112131A1 (de) * | 2016-07-01 | 2018-01-04 | Khs Corpoplast Gmbh | Dornenkette mit Magnethalterung |
| FR3063982B1 (fr) * | 2017-09-08 | 2019-04-12 | Sidel Participations | Installation de transport de preformes equipee d'un dispositif d'indexage angulaire de tournettes |
| DE102018128143A1 (de) * | 2018-11-09 | 2020-05-14 | Krones Ag | Vorrichtung und Verfahren zum Erwärmen von Kunststoffvorformlingen |
| IT201800020914A1 (it) * | 2018-12-21 | 2020-06-21 | Sidel Participations Sas | Gruppo e metodo per il trasferimento e l'orientamento di contenitori |
-
2021
- 2021-07-09 FR FR2107465A patent/FR3125029B1/fr active Active
-
2022
- 2022-07-08 WO PCT/EP2022/069185 patent/WO2023281102A1/fr not_active Ceased
- 2022-07-08 EP EP22740921.6A patent/EP4367047A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023281102A1 (fr) | 2023-01-12 |
| FR3125029B1 (fr) | 2023-11-03 |
| FR3125029A1 (fr) | 2023-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3873717B1 (fr) | Procede et dispositif de gestion de preformes immobilisees dans une station de chauffage | |
| EP4367047A1 (fr) | Procede de changement d'organes de prehension dans un dispositif de convoyage de corps creux | |
| EP3288742B2 (fr) | Procédé de commande d'un convoyeur de corps creux a travers une station de chauffage | |
| FR3104484A1 (fr) | Procédé d'indexation angulaire d'une préforme | |
| EP3873719B1 (fr) | Procédé de gestion de préformes immobilisées dans une station de chauffage après une interruption de production | |
| EP1327591B1 (fr) | Convoyeur de récipients à moteur lineaire | |
| EP2475512B1 (fr) | Procede de changement des empreintes de moulage d'une station de soufflage de recipients en plastique et dispositif de stockage dynamique | |
| EP4366931B1 (fr) | Dispositif de convoyage de preformes | |
| EP0486360B1 (fr) | Dispositif d'accumulation dynamique de récipients dans une chaîne de transfert par jets d'air | |
| FR3035650A1 (fr) | "station de traitement equipee d'un convoyeur de corps creux comportant un embranchement de bifurcation" | |
| FR3053963A1 (fr) | Table de convoyage de corps creux comportant une roue de transfert reglable en position | |
| EP4286137B1 (fr) | Procede de conditionnement thermique de preformes | |
| EP3546194A1 (fr) | Dispositif de convoyage muni d'un systeme de securite | |
| FR3153605A1 (fr) | Unité de conditionnement thermique de préformes avec magasin intégré | |
| EP4457073A1 (fr) | Procede de remplacements d organes de prehension de preformes et installation de convoyage associee | |
| FR3144541A1 (fr) | Dispositif de montage et/ou de démontage de nez de tournette et application à une unité de conditionnement thermique de préformes. | |
| FR3140360A1 (fr) | Procede de transfert de preforme sur un convoyeur | |
| EP4642608A1 (fr) | Dispositif de montage et/ou de démontage de nez de tournette et application à une unité de conditionnement thermique de préformes | |
| EP4642607A1 (fr) | Dispositif de montage et/ou de démontage de nez de tournette et application à une unité de conditionnement thermique de préformes | |
| WO2020065174A1 (fr) | Installation de fabrication de corps creux comportant un organe de regulation de la circulation des corps creux mu par un moteur electrique lineaire | |
| FR3090604A1 (fr) | « Dispositif de convoyage de préformes pour un four et procédé de commande d’un tel dispositif » | |
| WO2018083413A1 (fr) | Dispositif de manutention de produits |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20231213 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20260204 |