EP0328876B1 - Dispositif pour ouvrir des douilles plates - Google Patents

Dispositif pour ouvrir des douilles plates Download PDF

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Publication number
EP0328876B1
EP0328876B1 EP89100564A EP89100564A EP0328876B1 EP 0328876 B1 EP0328876 B1 EP 0328876B1 EP 89100564 A EP89100564 A EP 89100564A EP 89100564 A EP89100564 A EP 89100564A EP 0328876 B1 EP0328876 B1 EP 0328876B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
mandrel
movement
guide means
folding
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.)
Expired - Lifetime
Application number
EP89100564A
Other languages
German (de)
English (en)
Other versions
EP0328876A2 (fr
EP0328876A3 (en
Inventor
Wilhelm Reil
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
Tetra Alfa Holdings SA
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.)
Filing date
Publication date
Application filed by Tetra Laval Holdings and Finance SA, Tetra Alfa Holdings SA filed Critical Tetra Laval Holdings and Finance SA
Priority to AT89100564T priority Critical patent/ATE95757T1/de
Publication of EP0328876A2 publication Critical patent/EP0328876A2/fr
Publication of EP0328876A3 publication Critical patent/EP0328876A3/de
Application granted granted Critical
Publication of EP0328876B1 publication Critical patent/EP0328876B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/26—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks
    • B65B43/32—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks by external pressure diagonally applied
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/005—Making rigid or semi-rigid containers, e.g. boxes or cartons involving a particular layout of the machinery or relative arrangement of its subunits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/30—Construction of rigid or semi-rigid containers collapsible; temporarily collapsed during manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/76—Opening and distending flattened articles
    • B31B50/78—Mechanically

Definitions

  • the invention relates to a device for unfolding flat-lying sleeves made of paper, cardboard or the like with a longitudinal sealed seam, in particular for the production of liquid packs, with a transport device for gripping the flat-lying sleeves and inserting them into a sliding guide axially in alignment between a mandrel and a slide, the transport device a rocker which can be pivoted about an axis parallel to the linear direction of movement of the pusher, the sliding guide has a stationary fixed folding stop with V-shaped receiving surfaces and the pusher is provided on the front with a plate, has a stroke which is greater than the length of the sliding guide and controlled synchronously with the pivoting movement of the rocker, can be moved back and forth.
  • the invention is directed to all types of sleeves, which are used in particular for the production of superplasticizers, and is described for the purposes of illustration and better understanding with the aid of liquid packs.
  • Packaging for milk, juices and the like which have a sleeve made of paper with a plastic coating, one end of the sleeve being closed by folds with a square bottom and the other, opposite end of the sleeve having a molded-on cover without a carrier material, ie thus made of pure plastic.
  • Sleeves in the form of a tube with an essentially circular cross section are known here.
  • Machines constructed for the production of such packs have at least one mandrel wheel with a plurality of mandrels, the sleeve first being formed from a paper web (with a plastic coating) to form a longitudinal sealing seam and then being pushed onto the mandrel so that at one end the later cover, on which the pouring device is included, is injected.
  • the mandrel on which the sleeve is pushed practically represents the inner shape, around which a two-part outer shape is placed in order to connect the end of the sleeve to the injected plastic in such a way that the package has been sprayed liquid-tight on its cover.
  • Liquid packs of this type and also other designs of liquid packs are used as disposable packs to an ever greater extent by the end user and are therefore brought onto the market.
  • the corresponding filling machines and also packaging production machines must have a higher performance, i.e. more packages have to be produced per unit of time and thus more sleeves have to be pushed onto mandrels and provided with end walls.
  • the production is carried out in a machine in which the sleeve is first made flat and then passed between the mandrel and an ejector via a transport device, the sleeve coming from the flat in the round cross section is opened.
  • the round cross section it does not matter at which point on the circumference the longitudinal sealing seam, through which the flat web is formed to form the sleeve, is arranged.
  • the base is made of the paper material itself by folding, while on the opposite side the cover is also injection molded into a square shape and has the pouring device.
  • the latter is arranged in such a way that with its pouring tip, when the plan view is viewed from above, from the lid to a corner shows the same and is arranged in the vicinity.
  • the longitudinal sealing seam is arranged on the adjacent side folding edge relative to the pouring opening. It is easy to imagine that the packing becomes stiffer due to the double-layered edge strips in the area of the longitudinal seal.
  • the side edge of the package sleeve comes to lie with the longitudinal sealing seam in such a way that the pouring device is arranged transversely to the top in the lid in such a way that that when pouring out the plane of the pouring jet runs through those two side folding edges, in one vicinity of which the tip of the pouring opening is arranged and in the other vicinity the four fingers of the user attack during pouring out, while the thumb sticks to the crosswise and stiffened by the longitudinal sealing seam Side folding edge of the sleeve attacks.
  • This unfolding process does not succeed with perfect reliability without errors and can only be carried out with paper cores in which the longitudinal sealing seam is located directly next to a folding edge.
  • the material of the paper sleeves also plays a role, because there is a risk in the known unfolding device that the paper sleeve is not folded but folded over with double walls.
  • Each of the two arms in turn carries suction cups, which move synchronously under control to the opposite sides of the folded paper sleeve and not only unfold them but overstretch them similarly to the previously known device, so that the paper sleeve assumes a folded state again, but this time with the other two Opposing surfaces, i.e. in the transverse direction.
  • the paper sleeve which is thus kept overstretched, must again be used be transported straight to the corner of a trolley, where it is hoped that the paper tube will then spring open properly and be held in the trolley on the moving conveyor belt for further processing.
  • the latter device is complex and also not designed with the desired reliability
  • the inventor has therefore set itself the task of improving the device for unfolding flat sleeves of the type mentioned in such a way that it is possible with the new device to clamp the flat sleeve with greater reliability in a high working cycle into a shape with a square cross section, the longitudinal seal seam always comes to a certain point.
  • the rocker has a centering jaw at its end engaging the sleeve and can be pivoted along a stationary, part-cylinder jacket-shaped guide, that the pivoted end position of the centering jaw is attached opposite the folding stop, next to which swivel levers with vacuum openings are pivotally provided on both sides are that two respective planes delimiting a swivel lever span a V-shaped roof corresponding to two adjacent side faces of the unfolded sleeve, and that the plate of the pusher designed as a square plate is movable along the V-shaped planes.
  • the transport device transports a lower sleeve, which is moved out, for example, next to a magazine with a stack of flat-lying sleeves, along a quarter-circle arc into the position between the mandrel and the pusher.
  • the pusher is switched on and pushes the sleeve on the thorn.
  • the quarter-round arc ie the movement of the rocker arm and the transport of the sleeve, bring the longitudinal sealing seam from the initially "upper" position to the "left""Position because the center of the quarter circle, ie also the pivot axis of the Swing arm is arranged, for example, over the lowest, flat-lying sleeve and - in this exemplary embodiment presented - to the left of the mandrel that is just ready to be taken into consideration.
  • the quarter-circle arc is therefore practically a path that is comparable to the position of six to three in the clock.
  • swivel levers are provided on both sides next to the folding stop, which can pivot about axes which are also parallel to the pivot axis of the Swing arm, lying parallel to the elongated folding stop and, for example, at its height next to it.
  • Each pivot lever has one facing the space where the sleeve to be unfolded, a contact plane, in which vacuum openings open, in order to come into engagement with the two side walls of the sleeve, which lie next to the front "first" side folding edge and, if necessary, to support unfolding by the respective contact plane the adjacent side wall of the Pull up the sleeve while spreading.
  • the two pivot levers with their contact levels are arranged next to the folding stop so that the contact levels, like the V-shaped receiving surfaces of the folding stop, also span a roof in a V-shape.
  • this roof shape again seen in a direction parallel to the pivot axis of the rocker, is designed like a very pointed roof, and by pivoting open, e.g. the left pivot lever clockwise from the position 7 a.m. to 8 a.m. and accordingly on the Opposite side of the other swivel lever from the five o'clock to four o'clock position, the V-shape of the roof spreads while the sleeve is unfolded. When spreading, the two side surfaces of the unfolded sleeve, which are separated by the foremost of the "first" longitudinal folding edges, are sucked onto the respective contact plane of the pivoting lever (and this on each pivoting lever).
  • this sleeve which has been completely folded into a cuboid, is now pushed onto the square plate of the pusher on one side in that the pusher moves in the direction of its aforementioned movement, namely in the direction of the ready-to-take-up mandrel.
  • the square plate first hits the square, rear edge of the sleeve, forms it and holds it.
  • the rocker supports the unfolding process after the front of the "first" side folding edges of the sleeve abuts against the folding stop by first delaying its movement in a manner controlled by the movement of the pivoting levers (when the pivoting lever Have taken the clock or seven o'clock position and after opening the roof, ie moving the swivel lever into the four o'clock or eight o'clock position) and then moving a little further towards the folding stop, until the lower rear of the two "first" side fold edges of the sleeve is in its unfolded end position.
  • the sleeve When the pusher begins its pushing motion, the sleeve is held in the swivel levers by the vacuum, and the rocker can move the quarter-circle arc back to the starting position in order to pick up the next isolated, flat-lying sleeve.
  • the parallelepiped mandrel is arranged diagonally, so to speak, that is, the planes through its longitudinal outer edges lie horizontally and vertically (in contrast to the "straight" arrangement of a cuboid, in which the diagonals running through the cross-sections spanning the cross-section are not horizontal and vertical but lie diagonally to it.)
  • the rocker arm has an arm and at the radially outer end thereof a part-cylindrical holding plate, that a centering mouth with V-shaped receiving surfaces projecting outwards in cross section is fastened to at least one straight end edge of the holding plate and that the part-cylinder-shaped Sliding guide designed as a basket and stationary next to the path of movement of the retaining plate is attached.
  • the arm of the rocker is to be thought of as a connecting element between its pivot axis on the one hand and at arm's length from it, the holding plate on the other.
  • the retaining plate is curved in the direction of the pivot axis of the rocker, with one straight end edge at one end of the curve and the other edge at the other end of the curve.
  • An elongated centering jaw with the receiving surfaces mentioned is arranged on at least one end channel, because in the sense of the above-mentioned exemplary embodiment, the rear of the two "first" longitudinal folding edges of the still-lying sleeve is received in one position by this centering jaw when, for example, an eight o'clock Has taken position and then runs through its quarter-circle arc to the four o'clock or three o'clock position in order to move the flat-lying sleeve from the position under the magazine into the position against the folding stop in an arc. During this movement, the more or less flat sleeve slides on the part-cylinder-shaped basket, which is arranged close to the path of movement of the centering jaw.
  • the stationary folding stop has the shape of a strip which is longer than the sleeve to be unfolded and is approximately as long as the pivoting lever in the axial direction.
  • the V-shaped receiving surfaces of the folding stop can thus accommodate the entire front of the "first" longitudinal folding edges of the sleeve, which makes the guidance particularly reliable both before and during the receiving of the sleeve and during the unfolding process.
  • the contact plane of the respective pivot lever has recesses in which stationary rollers can be received.
  • the rollers serve to guide the unfolded sleeve when the ejector moves outward.
  • the rollers are rotatable about their longitudinal axes, but are otherwise immovably stationary on both sides under the folding stop in such a way that they each form a tangentially arranged guide plane. Both management levels then in turn span the desired V-shaped roof corresponding to the two side faces of the unfolded sleeve lying side by side.
  • the swivel levers are movable in relation to the stationary rollers, i.e. the recesses move like gates over the rollers when the swivel levers move.
  • the contact planes of the swivel levers can span a much more pointed V in the starting position and a blunt or flatter V in their end position than the V that the rollers span. The latter is generally rectangular.
  • a guide spanning a square corresponding to the cross-section of the sleeve is stationary on the side of the folding stop facing the mandrel of the machine.
  • This guide can be formed, for example, by four elongated rollers or alternatively also stationary sliding bodies, on which the unfolded sleeve is pushed out of the space under the folding stop onto the mandrel by the pusher.
  • the particular advantage of this leadership is its leadership function, as the name says.
  • the pusher has received and held the rear end of the unfolded sleeve with its square plate, then the front end of the square-unfolded sleeve comes into the guide after a short time during the movement of the pusher and is held by it.
  • the sleeve is already supported at the front and rear at its square edges at the beginning of the sliding movement, namely on the one hand by the guide just mentioned and on the other hand the square plate of the pushing device.
  • the swivel levers can then advantageously be used to form the very open or open the blunt V so that the sleeve is only guided by the rollers as it continues to advance under the stationary folding stop. Rolling friction prevents damage to the outer surface of the sleeve when it is pushed out.
  • the invention is further advantageously configured in that the slide has a cup-shaped housing in which the square plate is resiliently biased against the cup base and is arranged such that it can be moved linearly and at a distance from it, and in that the edge of the square plate corresponding to the circumferential contour of the unfolded sleeve is slanted inside.
  • the latter feature like a cone, promotes the attachment of the rear sleeve edge to the square plate when the pusher begins its outward movement.
  • the resilient mounting of the square plate on the other hand has the advantage that the slide can move up to the front face of the mandrel without damage and, moreover, can even push the sleeve far enough onto the mandrel.
  • the square plate which can be made of plastic, for example, preferably moves within the cup-shaped housing, which is preferably made of steel, so that in one position the square plate protrudes the farthest from the pusher and therefore first with the End face of the mandrel comes into contact; after encountering the end face of the mandrel, however, remains relative to the cup-shaped housing.
  • This housing and in particular its cylindrical side walls (of the cup) then move relative to the square plate seated on the end face of the mandrel and, during this relative movement, push the sleeve which has already been partially pushed onto the mandrel even further onto the mandrel, so that the trailing edge of the sleeve is practical comes to lie at a distance from the end edge of the mandrel. This is desirable and serves for the correct positioning of this rear sleeve edge, on which the plastic cover on the mandrel is then to be injection molded later.
  • a raised ring made of elastomeric material is embedded in the front end plane of the square plate.
  • the opening of the pusher and in particular its square plate on the end face of the mandrel is damped by such a raised ring, which can preferably be made of rubber.
  • Its ring surface can form a substantial part of the cross-sectional area of the sleeve and therefore form good storage and shock absorption for the pushing device.
  • a machine has therefore been made more powerful in that the filling and closing stations of the packaging machine are supplied by two mandrels.
  • this also entails placing sleeves on two mandrels in such a way that, after the sleeves have been inserted, e.g. from the additional, second "left" mandrel into the row of sleeves still provided with gaps from the "right” mandrel already described above, the sleeves are always arranged in the same position with respect to their longitudinal sealing seam.
  • the rocker is designed as a distributor rocker and has two opposing centering jaws and is arranged to be pivotable approximately semicircularly approximately between two folding stops with a pivoting lever and if the basket-shaped sliding guide is preferably designed in the shape of a semi-cylinder.
  • the distributor rocker with its centering jaw which is attached to the other straight end edge of the retaining plate, for example, pushes the next isolated, almost still lying sleeve clockwise on a further four-part arc into the position between the one when it returns from the position of the first right mandrel in a clockwise direction second left mandrel and a second pusher.
  • the magazine 1 is shown with flat-lying paper sleeves 2, which consist of paper material coated with plastic.
  • FIGS. 1, 2 and 4 one can see the frame 5 drawn out in detail in FIG. 13, which is connected in a stationary manner to the floor below by means of the screws, which are not described in any more detail, but are shown.
  • the frame 5 has rails 6 on its left side, which serve to guide the slider to be described later, which is generally designated 7 and is shown in more detail in connection with FIGS. 10 and 11.
  • the flat-lying sleeve 2 is to be guided by the transport device, generally designated 8, into the position in which the sleeve 2 is arranged in the illustration in FIGS. 1 and 2.
  • a folding stop 10 with V-shaped receiving surfaces 11 is fastened in the form of a strip which is longer than the sleeve 2.
  • a contact plane 14 in which recesses 15 are provided, in order to accommodate rollers 16 arranged in a stationary and rotatable manner.
  • a sectional view of this arrangement is shown in Figures 1 and 2, on the right with a view of the rollers 16 according to section line II and the left on the lever 13 (next to the rollers) according to section line I'-I 'of Figure 3.
  • the pivot lever 13 are driven via an air cylinder 17 and generally designated 18 drive levers pivotable about the axes 12.
  • the air cylinder is only necessary for the separate control in the embodiment according to FIGS. 1 to 3, in the illustration of FIGS. 4 and 5 the air cylinder is omitted, but not the drive levers 18, which are controlled synchronously by the drive of the distributor rocker arm 20 in the second embodiment , which is shown in Figures 6 and 7 (transport device).
  • the pivot levers 13 are in a position in which the contact planes 14 form an acute V. and the sleeve 2 with the longitudinal sealing seam arranged on the left is only shown in a slightly popped-up state.
  • FIG. 3 the larger, approximately left middle part of the folding space is shown under the folding stop 10 with the contact plane 14 and the rollers 16, in the right third in frame 5 the push-button 7 is indicated and on the opposite side of the folding space the one generally designated 23 Guide, which is shown in Figure 12 in plan view.
  • FIG. 3 One can also see in FIG. 3 the vacuum openings 24 and the vacuum pipe connections 25 in the part cut off at the top right and left as well as in FIGS. 1 and 2 the vacuum connecting pipes 26 between these vacuum lines 25 running parallel to the axes of rotation 12 and the openings 24 4 and 5, the vacuum openings 24 are visible with the only difference that the stationary rollers 16 are not present in FIGS. 4 and 5.
  • the steel housing 30 has the shape of a cup with cylinder-wall-shaped side walls 31, an axial bearing at 32 and recesses 33 for springs 34 which, compared to the steel housing 30, have a square plate 35 made of plastic at a distance d from the bottom 36 keep the housing biased.
  • the end face 37 of the square plate 35 has a raised ring 38 made of rubber.
  • the edge 39 of the square plate 35 is inclined inwards.
  • the sleeve 2 can also be seen with its rear edge 40, which, in addition to the beveling of the edge 39 of the square plate 35, bears on the annular end face of the cylindrical jacket-shaped side wall 31 of the steel housing 30.
  • This guide 23 is shown in FIG. 12 and attached to the plate 42.
  • the cross section of the unfolded sleeve 2 is a square.
  • the distributor rocker is shown in FIGS. 6 and 7 and designated 20. It has an arm 50 which carries a holding plate 51 via screws 52 and makes it pivotable about the axis 53 via the ball bearing 54 'shown at the top right in FIG. While the arm 50 of the distributor rocker 20 runs rectilinearly along a radius, surrounds the pivot axis 53 and pushes against the holding plate 51 and widens in an L-shape, as shown in FIG. 7, the holding plate 51 has the shape of a partial cylinder jacket surface with two curved ones Edges 54 'in Figure 7 right and left or in Figure 6 front the curved double line; and two straight end edges 55, the end points on the right and left in FIG. 6 and the straight double line in FIG. 7.
  • Centering jaws 56 are attached to both straight end edges 55 of the holding plate 51 and are provided with receiving surfaces 57 which are V-shaped in cross-section and project outwards (right and left).
  • the centering jaws 56 have the length of the straight end edge 55 and thus also a strip shape. Their length is approximately equal to the length of the sleeve 2 and thus also approximately equal to the length of the folding stop 10.
  • a partially cylindrical jacket-shaped basket 60 shown in FIGS. 8 and 9 in side view and plan view, which also belongs to the transport device 8, is formed from bent rods 61 and four support bolts 62 [arranged transverse to these parallel rods 60].
  • the basket stands firmly on the floor on the stationary supports 63 indicated in FIG. FIG. 7 also shows the rods 61 which are arranged in an arc and parallel and at a distance from one another and are square in cross section, which form the basket 60, which is also indicated in FIG. 6 on the right.
  • Two small guide plates 63 ensure that the sleeve 2 shown on the right in FIG. 8 is in contact on the upper side in FIG. 9 as a guide for the movement path of the sleeve 2 during the four-part arc movement of the distributor rocker 20 according to FIG. 8 from the six o'clock to the three o'clock position. Clock position.
  • the sleeve 2 in the magazine 1 shown in FIG. 7 initially lies flat on the bottom on the arcuate square rods 61 of the basket 60, the longitudinal sealing seam 4 being arranged at the top.
  • the flat-lying sleeve 2 has cracked slightly, so that its cross section has the shape of a rhombus.
  • the so-called "first" side fold edges are strongly folded, and in FIG. 6 one can see the right front longitudinal fold edge 3, while the other two opposite fold edges, one of which is arranged next to the longitudinal sealing seam 4, are weakly or almost not folded.
  • the V-shaped mounting surface 57 grips the left tip of the sleeve 2 when the arm 50 of the distributor rocker 20 has reached approximately an eight o'clock or seven o'clock position and its oscillating movement begins in the counterclockwise direction. If the distributor rocker 20 has reached its six o'clock position exactly, as shown in FIG. 6, then it has already pushed the sleeve 2, which is still partially flat, a bit in front of itself, and this movement continues until the state of FIG. 1 is reached.
  • the two pivot levers 13 are still quite close together, so that their contact levels 14 span a very pointed roof, the V of which only encloses a small angle.
  • the centering jaw 56 has now reached the position shown in FIG. 1 because the front side folding edge 3 of the sleeve 2 has just reached the tip of the V of the folding stop 10 between the receiving surfaces 11.
  • the pivot levers 13 can, as is particularly clearly shown in FIG. 4, have funnel-shaped bevels 70 in their lower area, so that the front side folding edge 3 of the sleeve 2 can be pushed well into the V-shaped space as far as under the folding stop 10.
  • FIG. 1 is now left in order to maintain the position and unfolding shape according to FIG.
  • the swivel levers 13 move apart by increasing the angle of the contact planes 14 between them until the centering jaw of the distributor rocker 20 has reached the position denoted by 56 'in FIG. 2.
  • the sleeve 2 has also reached its square shape (in cross section).
  • the sleeve 2 is now with its side wall 71 on the contact plane 14 of the left pivot lever 13, if you consider the section line I'-I 'of Figure 3 and on the opposite side of the stationary roller 16, if you take the section II of Figure 3 considered.
  • the sleeve has a rear edge 40 which first engages with and is held by the square 35 of the pusher 7, as shown on the left in FIG.
  • the pusher 7 has meanwhile already pushed the sleeve 2 onto the mandrel 9, and now the rubber ring 38 of the pusher 7 engages with the end face 41 of the mandrel 9, so that the cylindrical side wall 31 of the steel housing 30 pushes the trailing edge 40 of the sleeve 2 forward while squeezing the springs 34, the square plate 35 remains in the housing 30 because it is supported by the front end face 41 of the mandrel 9.
  • This pushing movement takes place along the distance d, as can be seen from FIG. 10 and the broken-off small view below.
  • the pusher 7 has now carried out its forward stroke, which is longer than the length L of the pivot lever 13 in Figure 3.
  • the operation is the same, except that to simplify the machine the stationary rollers 16 are omitted and the contact planes 14 of the pivot levers 13 are only interrupted by the vacuum openings 24, otherwise they are smooth, flat surfaces.
  • the pivoting levers are also controlled synchronously via not shown Drive devices for pivoting the distributor rocker 20, so that the air cylinder 17 in the embodiment according to FIG. 3 is missing here in the embodiment in FIG. 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)

Claims (8)

  1. Dispositif pour ouvrir des douilles posées à plat (2) en papier, carton ou analogue, avec un cordon de scellement longitudinal (4), en particulier pour la fabrication d'emballages pour liquides, avec un dispositif de transport (8) destiné à saisir les douilles posées à plat (2) et les introduire dans un guidage coulissant (10, 13, 14), aligné axialement, entre un mandrin (9,9') et un coulisseau (7), le dispositif de transport (8) présentant un balancier (20) susceptible de pivoter autour d'un axe (53) parallèle à la direction de déplacement linéaire (22) du coulisseau (7), le guidage coulissant (10, 13, 14) comportant une butée de pli (10), fixée stationnaire, avec des faces de réception (11) en forme de V et le coulisseau (7), qui est pourvu du côté avant d'une plaque (35), effectue une course supérieure à la longueur (L) du guidage coulissant (10, 13, 14) et est susceptible de se déplacer dans un sens et dans l'autre, sous l'action d'une commande, de façon synchrone par rapport au mouvement de pivotement du balancier (20), caractérisé en ce que le balancier présente à son extrémité (16), saisissant la douille (2), un bec de centrage (56) et étant susceptible de pivoter le long d'un guidage (60) localement fixe, ayant la forme d'une enveloppe de cylindre partiel, en ce que la position finale, déployée par pivotement du bec de centrage, est située à l'opposé de la butée de pli (10) à côté de laquelle des leviers pivotant (13) présentant des orifices à vide (24) sont susceptibles de pivoter, des deux côtés, en ce que deux plans d'appui (14), délimitant chacun un levier pivotant (13), enserrent les surfaces latérales (71, 72) placées l'une à côté de l'autre, en formant un toit en V, de la douille (2) ouverte, et en ce que la plaque, réalisée sous la forme de plaque carrée (35), du coulisseau (7) est susceptible de se déplacer le long des plans d'appui (14) orientés en formant un V.
  2. Dispositif selon la revendication 1, caractérisé en ce que le balancier (20) présente un bras (50) et, à son extrémité radialement extérieure, une tôle de maintien (51) en forme d'enveloppe de cylindre partiel, en ce que, sur au moins une arête d'extrémité rectiligne de la tôle de maintien (51), le bec de centrage (56) est fixé avec des surfaces de réception (57) ayant une section transversale en V et orientées vers l'extérieur, et en ce que le guidage coulissant (60) en forme d'enveloppe de cylindre partiel est réalisé sous forme de panier et monté stationnaire, à côté de la trajectoire de déplacement de la tôle de maintien (51) (figures 6 à 8).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la butée de pli stationnaire (10) présente la forme d'une bande, d'une longueur supérieure à celle de la douille (2) à ouvrir et à peu près de la longueur du levier pivotant (13), dans la direction axiale (12).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que le plan d'appui (14) du levier pivotant (13) présente des évidements (15) dans lesquels sont logés des galets (16) montés stationnaires (figure 3).
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que, du côté tourné vers le mandrin (9, 9') de la machine, de la butée de pli (10) est monté stationnaire un guidage (23), faisant un quadrilatère correspondant à la section transversale de la douille (2) (figures 1 et 12).
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que le coulisseau (7) comporte un carter en godet (30), dans lequel la plaque quadrangulaire (35) est précontrainte élastiquement contre le fond de godet (36) et disposée à une distance (d) de celui-ci et déplaçable de façon linéaire, et en ce que le bord (39), correspondant au contour périphérique de la douille (2) ouverte,de la plaque quadrangulaire (35) est incliné obliquement vers l'intérieur.
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce qu'un anneau en relief (38), en matériau élastomère, est inséré dans le plan frontal avant (37) de la plaque quadrangulaire (35).
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que le balancier (20) est réalisé sous forme de balancier distributeur et présente deux becs de centrage (56) opposés et est disposé de façon à pouvoir pivoter à peu près suivant la forme d'un demi-cercle, à peu près à mi-chemin entre deux butées de pli (10) équipées de leviers pivotants (13), le guidage coulissant (60) en forme de panier étant configuré de préférence sous forme d'enveloppe de demi-cylindre.
EP89100564A 1988-02-16 1989-01-13 Dispositif pour ouvrir des douilles plates Expired - Lifetime EP0328876B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89100564T ATE95757T1 (de) 1988-02-16 1989-01-13 Vorrichtung zum auffalten von flachliegenden huelsen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3804791A DE3804791C2 (de) 1988-02-16 1988-02-16 Vorrichtung zum Auffalten von flachliegenden Hülsen
DE3804791 1988-02-16

Publications (3)

Publication Number Publication Date
EP0328876A2 EP0328876A2 (fr) 1989-08-23
EP0328876A3 EP0328876A3 (en) 1990-04-25
EP0328876B1 true EP0328876B1 (fr) 1993-10-13

Family

ID=6347509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89100564A Expired - Lifetime EP0328876B1 (fr) 1988-02-16 1989-01-13 Dispositif pour ouvrir des douilles plates

Country Status (18)

Country Link
US (1) US4994011A (fr)
EP (1) EP0328876B1 (fr)
JP (1) JPH01254517A (fr)
KR (1) KR890012790A (fr)
CN (1) CN1015880B (fr)
AR (1) AR243115A1 (fr)
AT (1) ATE95757T1 (fr)
AU (1) AU613690B2 (fr)
BR (1) BR8900667A (fr)
CA (1) CA1301518C (fr)
DD (1) DD283361A5 (fr)
DE (2) DE3804791C2 (fr)
DK (1) DK70089A (fr)
ES (1) ES2045198T3 (fr)
FI (1) FI87755C (fr)
NO (1) NO174188C (fr)
RU (1) RU1807947C (fr)
YU (1) YU47300B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4232956C2 (de) * 1992-10-01 2002-02-21 Jagenberg Diana Gmbh Verfahren und Vorrichtung zum Nachbrechen der Längsrillinien bei der Herstellung von quaderförmigen Faltschachteln
GB2314291B (en) * 1995-02-03 1998-12-09 Tetra Laval Holdings & Finance Methods and apparatus for erecting tubular carton blanks
GB9502125D0 (en) * 1995-02-03 1995-03-22 Tetra Laval Holdings & Finance Methods and apparatus for erecting tubular carton blanks
US6073423A (en) * 1996-02-02 2000-06-13 Tetra Laval Holdings & Finance S.A. Methods and apparatus for erecting tubular carton blanks
CN101920584B (zh) * 2009-12-10 2012-01-11 西安航天华阳印刷包装设备有限公司 流体食品饮料软包装盒单片包材盒的成型方法
CN103274094B (zh) * 2013-05-17 2015-07-15 杭州中亚机械股份有限公司 一种纸板成形装配装置
DE102016109996A1 (de) * 2016-04-04 2017-10-05 Sig Technology Ag Verfahren und Vorrichtung zum Bilden von einseitig offenen Packungskörpern aus beidseitig offenen Packungsmänteln
CN117465742B (zh) * 2023-12-28 2024-04-09 山东省寿光蔬菜产业集团有限公司 一种熊蜂产品全自动货物打包机

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2357535A (en) * 1940-06-13 1944-09-05 American Paper Bottle Co Container fabricating machine
DE1022959B (de) * 1954-04-09 1958-01-16 Hesser Ag Maschf Vorrichtung zum Vereinzeln und OEffnen von flach zusammengelegten Faltschachtelhuelsen aus einem Stapel
US2881682A (en) * 1955-12-29 1959-04-14 Redington Co F B Carton conveying and transfer mechanism
DE1124799B (de) * 1960-04-05 1962-03-01 Karlsruhe Augsburg Iweka Vorrichtung zum Vereinzeln, OEffnen und Weiterbefoerdern von Schlauchstuecken
US3783752A (en) * 1972-05-09 1974-01-08 Langen H J & Sons Ltd Carton opening device
DE2743797C3 (de) * 1977-09-29 1981-01-29 Gartemann & Hollmann Gmbh, 4800 Bielefeld Bodenaufziehvorrichtung für quergeförderte Sackschlauchabschnitte
US4340380A (en) * 1980-06-23 1982-07-20 The Mead Corporation Article carrier erecting mechanism
SE436271B (sv) * 1981-03-13 1984-11-26 Tetra Pak Int Anordning for resning och forflyttning av forpackningsbehallaremnen
US4530692A (en) * 1983-08-25 1985-07-23 Consolidated Papers, Inc. Apparatus for opening folded corrugated cartons
US4562692A (en) * 1983-08-31 1986-01-07 R. A. Jones & Co. Inc. Accumulating apparatus between a cartoner and a side seam gluer
DE3429761A1 (de) * 1984-08-13 1986-02-27 Focke & Co (GmbH & Co), 2810 Verden Vorrichtung zum aufrichten von faltkartons
SE457634B (sv) * 1986-04-18 1989-01-16 Tetra Pak Ab Anordning foer resning av foerpackningsbehaallaraemnen

Also Published As

Publication number Publication date
CN1015880B (zh) 1992-03-18
NO890646D0 (no) 1989-02-15
EP0328876A2 (fr) 1989-08-23
CN1036529A (zh) 1989-10-25
NO174188C (no) 1994-03-30
DK70089A (da) 1989-08-17
NO890646L (no) 1989-08-17
AU2767789A (en) 1989-08-17
JPH01254517A (ja) 1989-10-11
ATE95757T1 (de) 1993-10-15
AR243115A1 (es) 1993-07-30
DE58905862D1 (de) 1993-11-18
FI890095A0 (fi) 1989-01-09
YU47300B (sh) 1995-01-31
AU613690B2 (en) 1991-08-08
CA1301518C (fr) 1992-05-26
DE3804791C2 (de) 1993-10-07
DK70089D0 (da) 1989-02-15
KR890012790A (ko) 1989-09-19
FI87755C (fi) 1993-02-25
DE3804791A1 (de) 1989-08-24
NO174188B (no) 1993-12-20
RU1807947C (ru) 1993-04-07
ES2045198T3 (es) 1994-01-16
EP0328876A3 (en) 1990-04-25
BR8900667A (pt) 1989-10-10
FI890095A7 (fi) 1989-08-17
YU24089A (en) 1991-02-28
DD283361A5 (de) 1990-10-10
US4994011A (en) 1991-02-19
FI87755B (fi) 1992-11-13

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