EP4019415B1 - Mécanisme de levage - Google Patents

Mécanisme de levage Download PDF

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Publication number
EP4019415B1
EP4019415B1 EP21204898.7A EP21204898A EP4019415B1 EP 4019415 B1 EP4019415 B1 EP 4019415B1 EP 21204898 A EP21204898 A EP 21204898A EP 4019415 B1 EP4019415 B1 EP 4019415B1
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EP
European Patent Office
Prior art keywords
lifting
toggle
pressure part
lifting gear
drive unit
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.)
Active
Application number
EP21204898.7A
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German (de)
English (en)
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EP4019415A1 (fr
Inventor
Maximilian Hetz
Stefan OBERSCHACHTSIEK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multivac Sepp Haggenmueller GmbH and Co KG
Original Assignee
Multivac Sepp Haggenmueller GmbH and Co KG
Priority date (The priority date 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 date listed.)
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Publication of EP4019415A1 publication Critical patent/EP4019415A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/46—Combinations of several jacks with means for interrelating lifting or lowering movements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B7/00—Presses characterised by a particular arrangement of the pressing members
    • B30B7/04—Presses characterised by a particular arrangement of the pressing members wherein pressing is effected in different directions simultaneously or in turn
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B65/00—Details peculiar to packaging machines and not otherwise provided for; Arrangements of such details
    • B65B65/02—Driving gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/245—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated comprising toggle levers

Definitions

  • the present invention relates to a lifting mechanism according to claim 1, which is designed on a packaging machine for opening and closing a work station formed thereon.
  • EP 0 895 933 A1 discloses a lifting device that has a lever system that is coupled to the adjustment movement of a lower tool part for lifting a base of the lifting device and a tool upper part that is firmly connected to it.
  • lowering the tool lower part into the open position of the lifting device simultaneously causes the height-adjustable base and thus the entire lifting device to be raised relative to the machine frame via the lever system in order to space the tool upper part from an upper film guided underneath.
  • Several adjustment drives and guides are used to operate this lifting device, which means that the lifting device is associated with high manufacturing costs.
  • EN 10 2006 006 218 A1 discloses a lifting mechanism with a toggle lever mechanism that is connected to a height adjustment of the lifting table in order to raise or lower a lower frame and a tool upper part connected thereto in response to the displacement of the lifting table.
  • the disadvantage of this is that the lifting mechanism, in particular the toggle lever mechanism provided thereon, for lifting the assembly, comprising the lower frame and the tool upper part carried on it, is associated with high manufacturing costs. This is due, among other things, to the fact that several guide units are required due to the high weight to be lifted via the toggle lever mechanism.
  • the toggle lever units used are primarily used to adjust the upper part of the tool. To achieve this, structurally complex drive and guide units are necessary, which leads to high manufacturing costs.
  • EP 3 294 636 B1 discloses a lifting device with a lifting table, which is preferably guided by at least two guide rods when being raised and lowered.
  • the lifting device has two toggle lever devices which are provided outside a machine frame.
  • the toggle lever devices can support a tool base in its raised position, ie minimize a load when the tool base is connected to a tool upper part.
  • the lifting device takes up a large amount of space overall.
  • a work station for a blister packaging machine is disclosed.
  • This work station has a toggle lever device by means of which a tool base can be raised and lowered.
  • the toggle lever device has two toggle lever joints, the operation of which is supported by guide elements.
  • the object of the invention is to provide a lifting mechanism with an adjustment mechanism which can be produced cost-effectively, in particular due to a reduced number of components provided thereon, and which is ideally suited to a packaging machine for a precise height adjustment of a tool lower part of a work station provided thereon.
  • the invention relates to a lifting mechanism for opening and closing a work station of a packaging machine, wherein the lifting mechanism has a stationary base, a lifting table which is mounted so as to be height-adjustable relative to the base along a lifting axis for supporting a tool lower part of the work station, and an adjustment mechanism for the lifting table which comprises a drive unit and a toggle lever device on which the lifting table is mounted.
  • the adjustment mechanism further comprises a pressure part which is adjustable by means of the drive unit, in particular along the lifting axis, and which is coupled to the toggle lever device, by means of the displacement of which the toggle lever device can be actuated to adjust the height of the lifting table along the lifting axis.
  • the adjustment mechanism for the lifting table comprises the drive unit, the pressure part which is adjustable in height with it, and the toggle lever device coupled thereto, wherein the pressure part is provided as a coupling element between the drive unit and the toggle lever device in order to transmit an adjustment force of the drive unit to the lifting table via the toggle lever device so that the latter can be raised or lowered.
  • the toggle lever device is thus present as a coupling gear between the drive unit and the lifting table.
  • the adjustment force of the drive unit therefore does not act directly, but indirectly, i.e. via the associated toggle lever device, on the lifting table for its height adjustment.
  • the toggle lever device can be used in particular as a transmission gear or as a Guide gear between the drive unit and the lifting table.
  • the height adjustment of the lifting table is thus the result of the adjustment movements of the drive unit and the toggle lever device that result along the lifting axis, are sequential or build on each other.
  • the knee lever principle can be used to advantage with the knee lever device, for example for quickly closing and opening the work station, which can increase the throughput rate on the packaging machine.
  • Such an adjustment mechanism is also compact overall, offers precise guidance and is particularly characterized by the possibility of a reduced number of components used to adjust the lifting table, so that the lifting mechanism can be manufactured cost-effectively overall.
  • the toggle lever device in the invention is a coupling gear, in particular a transmission gear and/or a guide gear for the lifting table, i.e. for the lower part of the tool mounted on it, and not for the upper part of the tool.
  • the adjustment movement of the drive unit can thus be translated, for example accelerated, to the lifting table using the toggle lever device in accordance with the toggle lever principle, which makes the lifting mechanism particularly economical to use.
  • the toggle lever device can prevent forces acting on the lower part of the tool and thus also on the lifting table, for example a Siegland force, from acting directly on the drive unit.
  • the invention provides that the toggle lever device has three separate toggle lever joints that can be operated together by moving the pressure part.
  • the respective toggle lever joints can thus be adjusted synchronously with one another in order to raise or lower the lifting table mounted on it evenly along the lifting axis, i.e. without it tipping over to the horizontal.
  • the respective toggle joints can each have three toggle levers. These can be connected to one another in an articulated manner at the ends formed thereon.
  • the toggle levers are attached to the base, the pressure part and the lifting table at the other ends.
  • raising the pressure part can cause two toggle levers to be extended, i.e. raising the lifting table, and lowering the pressure part can cause the two toggle levers to fold together, i.e. lowering the lifting table.
  • the knee lever device alone supports the lifting table.
  • the knee lever device that supports the lifting table is therefore the only direct substructure for the lifting table.
  • the toggle joints are arranged at a predetermined angle to one another in such a way that their joint operation functions as a linear guide for adjusting the lifting table along the lifting axis.
  • the toggle joints are designed and mounted at a certain angle to one another in such a way that together they form a guide gear for the lifting table. This means that simply by pivoting the respective toggle joints together at the same time, a movement along the lifting axis is achieved for the lifting table, i.e. the toggle joints themselves form a linear guide for the lifting table.
  • the toggle lever device has, preferably a total of, four separate toggle lever joints, which are arranged in pairs, crossed over, in a first and a second adjustment plane.
  • the toggle levers of one pair of toggle lever joints can pivot in the first adjustment plane and the toggle levers of the other pair of toggle lever joints can pivot in the second adjustment plane.
  • the toggle lever joints can work together in such a way that the lifting table only has one degree of freedom, namely along the lifting axis.
  • the two adjustment planes can be arranged at a predetermined angle to one another, which is, for example, 10° to 35° or 80° to 100°.
  • the first and second adjustment planes intersect along a drive axis of the drive unit.
  • the drive axis and the lifting axis are aligned with each other, preferably in a vertical direction.
  • the respective toggle joints can also work together in such a way that the lifting table only has one degree of freedom along the lifting axis. Otherwise, this already results in an extremely robust linear guide function for the lifting table along the lifting axis, so that additional, usually expensive linear guides can be dispensed with.
  • the toggle lever device can have three or four separate toggle lever joints, whereby toggle lever joints arranged in pairs next to one another can be adjusted in respective adjustment planes that intersect along a cutting line running parallel to a drive axis of the drive unit. This enables a particularly robust displacement of the lifting table because this automatically creates a stable guide for the lifting table displacement.
  • first pair it would be possible for a first pair to be formed from two toggle joints arranged next to each other and a second pair from the other two toggle joints arranged next to each other, with the respective adjustment planes of the two toggle joint pairs intersecting along intersection lines running parallel to the drive axis of the drive unit.
  • the two intersection lines are preferably the same distance from the drive axis. This ensures even load distribution during the lifting movement.
  • the pressure part is designed in the form of a plate.
  • the pressure part has a high mechanical rigidity.
  • the pressure part is perfectly suited to actuating the toggle lever device in a small installation space.
  • the toggle lever device is attached to the pressure part on the circumference.
  • the pressure part can thus be surrounded by the respective toggle lever joints provided on the toggle lever device.
  • the pressure part can be immersed in a space left free between the toggle lever joints for actuating the toggle lever joints attached to it on the circumference, so that overall a height-reduced structure is created. This also simultaneously results in a stable substructure for the lifting table mounted on it in a height-adjustable manner, so that the lower part of the tool mounted on it can absorb large forces.
  • the pressure part has an X-shaped contour. This allows the pressure part to be manufactured with reduced weight. Furthermore, it can provide advantageous attachment locations for the toggle lever device at its outward-facing ends provided thereby.
  • the pressure part has an O-shaped contour, for example in the form of a disk.
  • the disk could preferably have a diameter between 10cm and 30cm.
  • the toggle lever device i.e. the respective Knee lever joints must be attached to the circumference of the disc so that the knee lever joints are spaced apart from each other to ensure stable mounting of the lifting table.
  • the pressure part can be adjusted by means of the drive unit between a lowered position in which the pressure part is positioned closer to the base and a raised position in which the pressure part is positioned at a distance from the base.
  • the pressure part is positioned vertically below the toggle lever device when it is in the lowered position, and in the raised position it is positioned in the middle of the toggle lever device, i.e. between the toggle lever joints provided thereon. In addition to a compact design, this also results in a particularly uniform actuating force on the surrounding toggle lever joints.
  • One embodiment of the invention provides that the pressure part in the lowered position is positioned below the lower mounting bearings provided on the base for the toggle joints and/or the pressure part in the raised position is positioned above the lower mounting bearings provided on the base for the toggle device. This creates a particularly favorable force-motion transmission ratio that is exerted on the lifting table for its height adjustment by means of the toggle device, depending on the toggle principle generated thereby.
  • the toggle lever device is movable between a folded position and an extended position, in which upper attachment bearings provided on the lifting table for the toggle lever device have a different, in particular a smaller or larger, distance from each other than lower attachment bearings provided on the base for the toggle lever device.
  • the toggle lever device acts here as a centering unit to prevent the lifting table from tipping over.
  • the respective distances between the upper and lower attachment bearings can be selected in such a way that any naturally occurring play in the toggle lever joints has a negligible effect.
  • the centering function can in particular ensure that the lifting table comes to a stop in the same position with each lift.
  • the toggle lever device in particular the toggle lever joints formed thereon, in such a way that the lifting table mounted thereon during a lifting movement remains at least horizontally aligned. This allows the lower part of the tool stored on the lifting table to be brought together more precisely with an upper part of the tool arranged above it in order to carry out a packaging process in between, for example a deep-drawing process or a sealing process.
  • the pressure part is adjustable in a linear manner along the lifting axis. This allows the toggle joints arranged around the pressure part and attached to it to be operated precisely in order to adjust the lifting table mounted on it along the lifting axis.
  • a particularly cost-effective variant can be provided by guiding the pressure part on the drive side along the stroke axis solely by a retractable and extendable piston of the drive unit. This means that no further linear guide is assigned to the drive unit to guide the pressure part that can be adjusted with it.
  • the toggle lever device can be configured in such a way that the toggle lever joints, which are arranged on the circumference of the pressure part, hold it on the lifting axis.
  • the toggle lever joints simultaneously provide support to the pressure part from the outside so that it remains positioned along the lifting axis.
  • the piston rod and the toggle lever joints together thus provide a type of cascade guide for the pressure part and in particular for the lifting table. This means that separate linear guides are not required.
  • the lifting mechanism can have at least one separate linear guide for the pressure part. It would be conceivable to provide at least one linear guide mounted on the base next to the drive unit, which can support a linear extension movement of the piston of the drive unit.
  • the drive unit prefferably, it is practical for the drive unit to be designed as a pneumatic cylinder or electric cylinder. These take up little space on the lifting gear and are inexpensive to manufacture. Preferably, only a single pneumatic cylinder or electric cylinder is used.
  • the lifting mechanism according to the invention is particularly suitable for use on a thermoforming packaging machine or on a tray sealing machine, in particular as a lifting mechanism for a sealing station formed thereon, in order to bring together a sealing tool lower part provided thereon with a sealing tool upper part arranged above it for a sealing process that can be carried out between them.
  • FIG. 1 shows a perspective view of an intermittently operating thermoforming packaging machine 1.
  • This thermoforming packaging machine 1 has a forming station 2, a sealing station 3, a cross-cutting device 4 and a longitudinal cutting device 5, which are arranged in this order in a transport direction R on a machine frame 6.
  • the thermoforming packaging machine 1 also has a transport chain 11, which grips the bottom film 8 and transports it further in the transport direction R per main work cycle, in particular transport chains or clamp chains 11 arranged on both sides.
  • the forming station 2 is designed as a deep-drawing station in which troughs are formed in the bottom film 8 by deep-drawing, for example by means of compressed air and/or vacuum.
  • the forming station 2 can be designed in such a way that several troughs are formed next to one another in the direction perpendicular to the transport direction R.
  • a filling section 12 is provided in which the troughs formed in the bottom film 8 are filled with products.
  • the sealing station 3 has a hermetically sealable chamber 3a in which the atmosphere in the troughs can be evacuated, for example, and/or replaced by gas flushing with a replacement gas or with a gas mixture before sealing with the upper film 10 released from an upper film holder 9.
  • the cross-cutting device 4 can be designed as a punch that cuts the bottom film 8 and the top film 10 in a direction transverse to the transport direction R between adjacent troughs.
  • the cross-cutting device 4 works in such a way that the bottom film 8 is not cut across the entire width, but is not cut at least in one edge area. This enables controlled further transport through the transport chain 11.
  • the longitudinal cutting device 5 can be designed as a knife arrangement with which the lower film 8 and the upper film 10 are severed between adjacent troughs and at the lateral edge of the lower film 8 in the transport direction R, so that individual packages are present behind the longitudinal cutting device 5.
  • These chain guides 13 are each protected on the outside by a side panel 14 of the thermoforming packaging machine 1 and, if necessary, are attached to the side panel 14.
  • the side panel 14 can be a sheet metal part.
  • the thermoforming packaging machine 1 also has a control system 19. Its task is to control and monitor the processes taking place in the thermoforming packaging machine 1.
  • a display device 20a with operating elements 20b is used to visualize or influence the process sequences in the thermoforming packaging machine 1 for or by an operator.
  • FIG. 2 shows a tray sealing machine 15, which is also called a "tray sealer” in technical circles.
  • This tray sealing machine 15 has a feed belt 16, a sealing station 17 and a discharge belt 18, which are arranged in this order in the transport direction R on a machine frame 21.
  • the tray sealing machine 15 also comprises a gripper device 22, by means of which prefabricated trays S can be picked up from the feed belt 16 and transported to the sealing station 17 for a sealing process taking place therein.
  • the gripper device 22 is also designed to grip sealed trays S within the sealing station 17 and to deliver them to the discharge belt 18 for removal thereon.
  • the unsealed trays S positioned within the sealing station 22 can be sealed by means of a top film 23 passed through the sealing station 22.
  • Figure 3A shows a lifting mechanism 24 for opening and closing a work station of a packaging machine.
  • the work station can, for example, be used as a sealing station 3 of the Figure 1 shown thermoforming packaging machine 1 or as sealing station 17 of the in Figure 2 shown tray sealing machine 15.
  • the lifting mechanism 24 is shown in an open position S1.
  • the lifting mechanism 24 has a base 25, a lifting table 26 which is mounted so that it can be adjusted in height relative to the base 25 along a lifting axis H and on which a tool base 27, which is in the form of a shell holder 31, is positioned.
  • the lifting mechanism 24 also comprises an adjustment mechanism 28 which has a drive unit 29 and a toggle lever device 30.
  • the tray holder 31 is designed to receive troughs that are formed along the thermoforming packaging machine 1.
  • the lower tool part 27 can be brought together with an upper tool part 32 arranged above it for a packaging process, for example for a sealing process.
  • the lifting mechanism 24 is attached to a machine frame 33 on both sides.
  • the base 25 of the lifting mechanism 24 is connected to the machine frame 33 by means of support rods 34, i.e. is mounted in a stationary manner relative to the machine frame 33.
  • support rods 34 i.e. is mounted in a stationary manner relative to the machine frame 33.
  • the base 25 remains mounted in a stationary manner.
  • Two supports 35 are attached to the lower ends of the support rods 34 transversely to the transport direction R.
  • a base plate 36 is mounted on the two supports 35.
  • the support rods 34, the two supports 35 and the base plate 36 attached to them form a load-bearing base 25 attached to the machine frame 33.
  • FIG. 3A shows Figure 3A that the drive unit 29 is attached to the base plate 36.
  • the drive unit 29 is designed as a piston-cylinder unit 37.
  • the piston-cylinder unit 37 is, for example, a pneumatic cylinder or an electric cylinder, which is provided for adjusting the lifting table 26 along the lifting axis H.
  • Figure 3A also shows that the adjustment mechanism 28 has a pressure part 38 which is adjustable along the lifting axis H by means of the drive unit 29 and coupled to the toggle lever device 30, by means of whose displacements along the lifting axis H the toggle lever device 30 can be actuated for a height adjustment of the lifting table 26.
  • Figure 3B shows the lifting mechanism 24 in a closed position S2, in which the lower tool part 27 and the upper tool part 32 are brought together.
  • the Figure 3A in a lowered position P1 shown pressure part 38, in which it is positioned close to the base plate 36, in the Figure 3B shown raised position P2, in which the Pressure part 38 is positioned at a distance from the base plate 36.
  • the toggle lever device 30 is compared to a Figure 3A
  • the folded position M1 shown is now adjusted to a stretched position M2.
  • toggle lever joints 39a to 39d are arranged in pairs, crossing each other, in a first and a second adjustment plane E1, E2.
  • the respective toggle levers of the two toggle lever joints 39a and 39c can be pivoted in the adjustment plane E1 and the respective toggle levers of the other two toggle lever joints 39b and 39d can be pivoted in the adjustment plane E2.
  • the two adjustment planes E1, E2 are arranged at a predetermined angle ⁇ to each other.
  • the angle ⁇ is an acute angle and is, for example, 20°.
  • the two adjustment planes E1, E2 intersect along a drive axis A of the drive unit 29.
  • Figure 3B also shows that the piston-cylinder unit 37 has an extendable piston 40 which is adjustable along the drive axis A, which is aligned with the lifting axis H.
  • the pressure part 38 attached to an upper end of the piston 40 causes, by means of its displacement along the drive axis A, that the toggle lever device 30 moves between the folded-in position M1 from Figure 3A and the extended position M2 of the Figure 3B
  • the toggle lever joints 39a to 39d of the toggle lever device 30 can thus be adjusted synchronously in order to move the lifting table 26 mounted thereon along the lifting axis H.
  • Figure 3B also shows that in the extended position M2 of the toggle lever device 30, upper mounting bearings 41a, 41b have a distance a from each other. Furthermore, Figure 3B that lower mounting bearings 42a, 42b provided on the base 25 for the toggle lever device 30 have a distance b from each other. The Figure 3B The distance a shown between the upper mounting bearings 41a, 41b is smaller than the distance b between the lower mounting bearings 42a, 42b.
  • a centering function is provided for the lifting table 26, which can be adjusted thereby, during the lifting of the pressure part 38 via the toggle lever device 30, so that it comes to a stop at a predetermined position with each stroke, ie the lower tool part 27 positioned thereon is brought together precisely with the upper tool part 32 arranged above it with each stroke.
  • a linear guide 43 positioned next to the piston-cylinder unit 37 is provided on the base plate 36.
  • Such a linear guide 43 could also be provided on the base plate 36 in duplicate on opposite sides of the piston 40.
  • the adjustment mechanism 28 also functions without the separate linear guide 43. This results in a guided height adjustment of the lifting table 26 along the lifting axis H solely by the piston 40 of the piston-cylinder unit 37, which can be extended along the drive axis A, and the respective toggle lever joints 39a to 39d.
  • Figure 4 shows the Figure 3B mounted toggle lever device 30 from above.
  • the intersection line formed by the two adjustment planes E1, E2 corresponds here to the drive axis A of the drive unit 29.
  • the two adjustment planes E1, E2 intersect at an angle ⁇ .
  • the angle ⁇ is in particular 80° to 100°.
  • FIG. 5 shows a different arrangement of the four toggle joints 39a to 39d.
  • the toggle joints 39a to 39d are adjustably mounted in the respective adjustment planes Ea, Eb, Ec, Ed.
  • the two adjustment planes Eb, Ec of the toggle joints 39b, 39c intersect in a straight line B.
  • the two adjustment planes Ea, Ed of the toggle joints 39a, 39d intersect in a straight line C.
  • the two straight lines B, C run parallel to the drive axis A of the drive unit 29.
  • Figure 5 that the two intersection lines B, C run equidistant from the drive axis A. This enables a particularly robust displacement of the lifting table 26, because this automatically creates a stable guide for it.
  • the respective pairs of intersection lines Ea, Ed and Eb, Ec intersect in particular at an angle of 80° to 100°.
  • FIG. 6 shows the two toggle joints 39b, 39c from above according to the arrangement of Figure 5 .
  • Figure 6 shows Figure 6 a third knee joint 39e, which connects the two Figure 5 shown toggle joints 39a, 39b.
  • These three toggle joints 39b, 39c, 39e have adjustment planes Eb, Ec, Ee that intersect along a single intersection line D that runs parallel to the drive axis A of the drive unit 29.
  • the toggle joint 39e is mounted in such a way that the drive axis A of the drive unit 29 lies in its adjustment plane Ee. This results in robust, precisely guided adjustability for the lifting table 26, even if only the three toggle joints 39b, 39c, 39e are used.
  • the arrangement of the respective toggle joints 39b, 39c, 39e could be such that their three adjustment planes Eb, Ec, Ee intersect each other at an angle of 120°.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (14)

  1. Dispositif de levage (24) pour ouvrir et fermer un poste de travail d'une machine d'emballage, dans lequel le dispositif de levage (24) comporte une base montée de manière fixe (25), une table élévatrice (26) montée de manière réglable en hauteur par rapport à la base (25) le long d'un axe de levage (H) pour porter une partie d'outil inférieure (27) du poste de travail, ainsi qu'un mécanisme de réglage (28) qui comprend une unité d'entraînement (29) et un dispositif à levier basculant (30) sur lequel est montée la table élévatrice (26), dans lequel le mécanisme de réglage (28) comporte en outre une pièce de pression (38) couplée au dispositif à levier basculant (30) réglable au moyen de l'unité d'entraînement (29), le déplacement de ladite pièce permettant d'actionner le dispositif à levier basculant (30) pour un réglage en hauteur de la table élévatrice (26) le long de l'axe de levage (H), caractérisé en ce que le dispositif à levier basculant (30) comporte au moins trois articulations à levier basculant séparées (39a à 39d), qui peuvent être actionnées conjointement par un déplacement de la pièce de pression (38).
  2. Dispositif de levage selon la revendication 1, caractérisé en ce que les articulations à levier basculant (39a à 39d) sont agencées selon un angle prédéterminé (α) les unes par rapport aux autres de telle sorte que leur actionnement conjoint fonctionne comme un guide linéaire pour le réglage de la table élévatrice (26) le long de l'axe de levage (H).
  3. Dispositif de levage selon l'une des revendications précédentes, caractérisé en ce que le dispositif à levier basculant (30) comporte quatre articulations à levier basculant séparées (39a à 39d), qui sont agencées par paires croisées dans des premier et deuxième plans de réglage (E1, E2).
  4. Dispositif de levage selon la revendication 3, caractérisé en ce que les premier et deuxième plans de réglage (E1, E2) se coupent le long d'un axe d'entraînement (A) de l'unité d'entraînement (29).
  5. Dispositif de levage selon l'une des revendications précédentes, caractérisé en ce que le dispositif à levier basculant (30) comporte trois ou quatre articulations à levier basculant séparées (39a à 39e), dans lequel les articulations à levier basculant (39a à 39e) sont agencées de manière réglable, côte à côte par paires dans des plans de réglage respectifs (Ea, Eb, Ec, Ed, Ee), et se croisent sur des droites d'intersection (B, C, D) parallèles à un axe d'entraînement (A) de l'unité d'entraînement (29).
  6. Dispositif de levage selon l'une des revendications précédentes, caractérisé en ce que la pièce de pression (38) présente une forme de plaque et/ou un contour en forme de X ou en forme de O.
  7. Dispositif de levage selon la revendication 6, caractérisé en ce que le dispositif à levier basculant (30) est fixé circonférentiellement sur la plaque.
  8. Dispositif de levage selon l'une des revendications précédentes, caractérisé en ce que la pièce de pression (38) est réglable au moyen de l'unité d'entraînement (29) entre une position abaissée (P1) dans laquelle la pièce de pression (38) est approchée de la base (25), et une position levée (P2) dans laquelle la pièce de pression (38) est écartée de la base (25).
  9. Dispositif de levage selon la revendication 8, caractérisé en ce que la pièce de pression (38) est positionnée dans la position abaissée (P1) en dessous de paliers de montage inférieurs (42a, 42b) pourvus sur la base (25) pour le dispositif à levier basculant (30) et/ ou en ce que la pièce de pression (38) est positionnée dans la position levée (P2) au-dessus des paliers de montage inférieurs (42a, 42b) pourvus sur la base (25) pour le dispositif à levier basculant (30).
  10. Dispositif de levage selon l'une des revendications précédentes, caractérisé en ce que le dispositif à levier basculant (30) est mobile entre une position repliée (M1) et une position déployée (M2), dans laquelle des paliers de montage supérieurs (41a, 41b) pourvus sur la table élévatrice (26) pour le dispositif à levier basculant (30) présentent un espacement différent de celui des paliers de montage inférieurs (42a, 42b) pourvus sur la base (25) pour le dispositif à levier basculant (30).
  11. Dispositif de levage selon l'une des revendications précédentes, caractérisé en ce que la pièce de pression (38) est réglable de manière linéaire le long de l'axe de levage (H).
  12. Dispositif de levage selon la revendication 11, caractérisé en ce que la pièce de pression (38) est guidée du côté entraînement uniquement par un piston rétractable et extensible (40) de l'unité d'entraînement (29) le long de l'axe de levage (H), ou en ce que le dispositif de levage (24) comporte au moins un guide linéaire séparé (43) pour la pièce de pression (38).
  13. Dispositif de levage selon l'une des revendications précédentes, caractérisé en ce que l'unité d'entraînement (29) est réalisée sous forme d'un vérin pneumatique ou d'un vérin électrique.
  14. Thermoformeuse d'emballage (1) ou operculeuse de barquettes (15) comportant au moins un dispositif de levage (24) selon l'une des revendications précédentes.
EP21204898.7A 2020-12-23 2021-10-27 Mécanisme de levage Active EP4019415B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020134816.9A DE102020134816A1 (de) 2020-12-23 2020-12-23 Hubwerk

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EP4019415B1 true EP4019415B1 (fr) 2024-05-29

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DE (1) DE102020134816A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US364995A (en) * 1887-06-14 John melvin drew
DE7305441U (de) 1973-09-27 Bosch R Gmbh Vorrichtung zum Öffnen und Schließen von Bearbeitungsstationen
DE3638730A1 (de) 1986-11-13 1988-05-26 Georg Roeck Vorrichtung zum umsetzen, uebersetzen und uebertragen eines druckes
DE19702889C2 (de) * 1996-01-26 2001-09-06 Engel Gmbh Maschbau Antriebseinrichtung für einen Schließmechanismus und/oder eine Einspritzeinheit einer Spritzgießmaschine
DE29621761U1 (de) * 1996-12-14 1998-04-09 Dixie-Union GmbH & Co. KG, 87437 Kempten Verpackungsmaschine mit einer aus einem Oberteil und einem Unterteil bestehenden Kammer
ES2197273T5 (es) 1997-08-08 2007-11-01 Multivac Sepp Haggenmuller Kg Dispositivo de elevacion para una estacion de trabajo de una maquina envasadora.
DE19960084A1 (de) * 1999-12-13 2001-06-21 Kraemer & Grebe Kg Verpackungsmaschine
DE10327092A1 (de) 2003-06-13 2004-12-30 Cfs Germany Gmbh Arbeitsstation und Verpackungsmaschine
DE102006006218A1 (de) 2006-02-09 2007-08-16 Cfs Germany Gmbh Hubvorrichtung für eine Verpackungsmaschine
DE102012003839A1 (de) * 2012-02-29 2013-08-29 Zahoransky Ag Überwachung einer Kniehebelbewegung
EP2666727B1 (fr) * 2012-05-24 2016-09-07 MULTIVAC Sepp Haggenmüller SE & Co. KG Dispositif de levage pour une machine d'emballage
TR201907236T4 (tr) 2015-05-13 2019-06-21 Gea Food Solutions Germany Gmbh Bir kaldırma cihazına sahip paketleme makinesi.
DE102019219833A1 (de) * 2019-12-17 2021-06-17 Multivac Sepp Haggenmüller Se & Co. Kg Arbeitsstation für eine Verpackungsmaschine mit einem Hubwerk mit Kniehebelmechanismus

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US20220194761A1 (en) 2022-06-23
EP4019415A1 (fr) 2022-06-29
DE102020134816A1 (de) 2022-06-23

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