EP0574875B1 - Door for the single-facer section of a corrugated cardboard making machine - Google Patents

Door for the single-facer section of a corrugated cardboard making machine Download PDF

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Publication number
EP0574875B1
EP0574875B1 EP19930109522 EP93109522A EP0574875B1 EP 0574875 B1 EP0574875 B1 EP 0574875B1 EP 19930109522 EP19930109522 EP 19930109522 EP 93109522 A EP93109522 A EP 93109522A EP 0574875 B1 EP0574875 B1 EP 0574875B1
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EP
European Patent Office
Prior art keywords
door
hook
hooks
fact
panel
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
EP19930109522
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German (de)
French (fr)
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EP0574875A1 (en
Inventor
Peter Buetikofer
Martin Hoffmann
Nicolaus Goerrissen
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.)
Peters Maschinenfabrik GmbH
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Peters Maschinenfabrik GmbH
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Publication date
Application filed by Peters Maschinenfabrik GmbH filed Critical Peters Maschinenfabrik GmbH
Publication of EP0574875A1 publication Critical patent/EP0574875A1/en
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Classifications

    • 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
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/22—Safety features
    • B65D90/32—Arrangements for preventing, or minimising the effect of, excessive or insufficient pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/0801—Multiple
    • Y10T292/0825—Hooked end
    • Y10T292/0826—Operating means
    • Y10T292/0828—Link and lever

Definitions

  • the present invention relates to a door for the "single-sided station" of a machine for manufacturing corrugated cardboard, in particular a rear door mounted on rails and closing the internal volume of the "single-sided” station so that this volume can be set under pneumatic pressure.
  • a first paper is corrugated by passing between two fluted rolls, then receives from a gluing unit, before application of a second paper facing from a third lower pressing cylinder, a thread of adhesive deposited on the crests of the corrugations thus formed.
  • the frame of such a station comprises a base flanked by two side walls, the front edges of which support the two grooved cylinders and the lower pressure cylinder which constitute, as it were, a front wall. Between the two side walls is located the gluing unit whose front gluing roller is brought with a very precise gap close to the rear lower part of the second lower grooved roller.
  • This gluing unit is usually mounted on rails in order to be able to take it out from the rear of the station for cleaning, maintenance and repair, and also to allow access to the cylinders, from the rear, for identical operations.
  • a recent technique for correctly maintaining the corrugated paper in the grooves in the rear part of the second cylinder, where gluing takes place consists in closing the upper part of the station with a plate, the rear face with a door, and in pressurizing the internal volume thus defined at a pneumatic pressure of in the range of 50 to 60 millibars. Obviously, this door must always be able to be reopened in order to allow the gluing unit to exit when necessary, which poses a double locking and sealing problem for this door.
  • the object of the present invention is a "single-sided" station door which, by design, incorporates a safety device upon opening in the event of residual pressure in the internal volume.
  • the locking system must be easier to handle, both when opening and closing.
  • the sealing device which should in fact only support a slight pneumatic overpressure, to be of a more reliable design and in particular insensitive to the final position of the door in the frame.
  • a door consisting of a panel of external dimensions slightly smaller than the internal dimensions of a frame in which this panel must engage, the periphery of the edge of this panel having a thickness different from the thickness. of the frame and being furnished with a peripheral seal coming to bear against the internal periphery of the frame, the door comprising rails, integral with the panel, on the internal face of which they are fixed by means of brackets, the rails being arranged so as to be able to slide in slides arranged in a base of a station frame and provided, at one of their ends with a stop piece intended to limit the rear stroke of the door when they arrive in contact with abutments, said rails supporting a gluing unit, from the station, being able to move thereon by means of rollers, the door also comprising means of v interlocking comprising at least one fixed hook perpendicularly against the internal face of the door panel, this hook being able to be lifted, when desired, in a vertical plane by a device to engage the hook on a
  • the door can somewhat couple, over a distance of three to four centimeters, inside the frame like a piston in a cylinder without losing its tightness.
  • the curvature, directed in the direction of the face of the panel, of the front part of the internal notch of the hook means that, when the internal volume is pressurized, the door is brought to start slightly behind making it impossible any lifting of the hook until this overpressure has not completely disappeared. The release of the hooks is therefore only possible after reinserting the front of this door.
  • the seal may consist of a more or less hollow bead of elastomer or flexible plastic, or of a series of longitudinal rollers pushed back by internal return means or any other type of seal which will crush enough to allow inserting the panel into the frame without difficulty.
  • a particularly advantageous solution consists in mounting brushes along the periphery of the door, so that their bristles emerge from the edge.
  • the lower front part of the hook can be oriented obliquely downwards to be lifted automatically by the axis of integral locking of the frame, this before the fall of the hook and its engagement on the locking pin, when the door is closed.
  • the door comprises a hook on each side for a better distribution of the holding forces, the hook lifting device then comprising a horizontal axis mounted, movably in rotation, against the internal face of the door by bearings, this horizontal axis being connected by each of its ends to one of the hooks thus making it possible to simultaneously impart to them a movement in rotation upwards or downwards.
  • the door may include a vertical pair of hooks on each side, the lower and upper hooks of a side pair being connected by a vertical bar and the horizontal axis of the hook lifter being supplemented at each end by a substantially horizontal arm whose end is connected to the corresponding vertical bar so that the partial rotational movement of the horizontal axis is transmitted to each of the hooks.
  • a better device comprises a substantially vertical central arm secured to the horizontal axis of this hook lifting device, the other end of this central arm being connected, movable in rotation, to a horizontal control lever passing through the door.
  • This control lever performing only a longitudinal translation movement, it can therefore pass through this door through a simple orifice, which greatly limits pressure losses.
  • FIG. 1 is illustrated, in section, a "single-sided" station 10 of which we recognize in the front part, that is to say in the left part of FIG. 1, the two upper fluted cylinders 1 and lower 3 with, at the bottom, the pressing cylinder 5.
  • the frame 11 of this station comprises a horizontal base flanked by two side walls 4 closed at the top by a cover.
  • the rear frame 18 is delimited at the top by a cross-member 6, on each side by the rear edges of the side walls 4, and at the bottom by a horizontal plate 6 ′, these various elements delimiting an internal volume V of the single-sided station 10.
  • a gluing unit 20, of which the front gluing roller 7, almost in contact with the rear part of the lower grooved cylinder 5, is housed in this internal volume V.
  • the gluing unit 20 rests, via rollers 2, on rails 8.
  • the rear closing door 15 essentially consists of a panel 16 supported by a spacer 17 at the ends of which are mounted rollers 19.
  • the panel 16 is equipped with brackets 14 fixed on the rails 8 which are arranged so as to be able to slide in slides arranged in the base of the frame 11 of the station 10
  • the external dimensions of the panel 16 of the door 15 are very slightly smaller, of the order of 5 to 10 millimeters, than the internal dimensions of the rear frame 18 of the frame 11 described above.
  • the seal between the pneumatic overpressure prevailing inside the internal volume V of the single-sided station 10 and the outside atmospheric air is produced here by upper horizontal brushes 72, lower 74 and by lateral brushes 76 reported by screwing or riveting along the outer periphery of the frame 16 of the door 15, the bristles of these upper 72, lower 74 and lateral brushes being oriented towards the outside.
  • these brushes are made of nylon wire having sufficient rigidity even after long periods of use.
  • the door locking device 15 comprises four hooks 30, distributed in pairs in the height of the panel 16, each of the hooks 30 being mounted substantially in the vicinity of each of the four corners of the panel 16 of the door 15.
  • each hook 30 is mounted on a support 39 while being oriented perpendicularly to the door 15 and this is movable in rotation, in a vertical plane, around a pivot 50.
  • the hooks 30 of a lateral pair, as shown in FIG. 2 are interconnected by a pull tab vertical 34, each end of which is connected to its respective hook 30 by a pivot.
  • the two pairs of hooks 30, connected by the vertical pulls 34 are also coupled by a horizontal axis 40 mounted, on the internal face of the panel 16 of the door 15, in bearings 38, constituted in this case of simple perforated and welded plates against the panel 16.
  • a horizontal axis 40 mounted, on the internal face of the panel 16 of the door 15, in bearings 38, constituted in this case of simple perforated and welded plates against the panel 16.
  • Each end of this axis 40 is completed by an arm 36, substantially horizontal, the ends of these arms 36 being connected by a pivot to the corresponding vertical bar 34.
  • This horizontal axis 40 is also completed with a central arm 42, preferably oriented downwards, the end of which is connected, also by a pivot, to a control lever 44 horizontally passing through the panel 16 of the door 15 through an orifice whose dimensions are just sufficient to allow translation of this lever without loss of pneumatic pressure.
  • each hook 30 has an internal notch 33 provided to engage on a locking pin 32 located, in correspondence, in the side wall 4 of the frame 11 of the station 10. More in particular, the front part of this internal notch 33 has a strong curvature towards the front so that, once these hooks 30 engage on the axes 32 and the door 15 being pushed back by the overpressure prevailing in the station 10, these hooks 30 completely surround the locking pin 32 and can no longer be lifted directly, thus preventing any untimely movement towards the rear of the door 15.
  • each hook 30 is obliquely oriented downwards with the upper part higher than the locking pin 32.
  • the closing of this door 15 is particularly easy because, once the gluing unit 20 is rolled inside the station 10, just push this door 15, the rails 8 sliding inside their slides located in the frame 11, until the hooks 30 meet the locking pins 32. Thanks to the oblique front portion of these hooks 30 ' , these will be lifted automatically until the internal notches 33 arrive at these axes, the hooks 30 falling immediately by their weight on the locking axes 32.
  • the relatively simple design of the locking and sealing system of this door 15 ensures better safety in the use of the machine, in the event of residual overpressure in station 10, by preventing the untimely opening of the latter, and by authorizing an easy and safe closing of the station 10 by a simple push on the door 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Description

La présente invention concerne une porte pour la station "simple face d'une machine de fabrication de carton ondulé, notamment une porte arrière montée sur rails et fermant le volume interne de la station "simple face" de telle sorte que ce volume puisse être mis sous pression pneumatique.The present invention relates to a door for the "single-sided station" of a machine for manufacturing corrugated cardboard, in particular a rear door mounted on rails and closing the internal volume of the "single-sided" station so that this volume can be set under pneumatic pressure.

Dans une telle station "simple face", normalement située en amont de la machine de fabrication de carton, un premier papier est ondulé par passage entre deux cylindres cannelés, puis reçoit d'une unité d'encollage, avant application d'un second papier de parement venant d'un troisième cylindre presseur inférieur, un filet de colle déposé sur les crêtes des ondulations ainsi formées.In such a "single-sided" station, normally located upstream of the cardboard manufacturing machine, a first paper is corrugated by passing between two fluted rolls, then receives from a gluing unit, before application of a second paper facing from a third lower pressing cylinder, a thread of adhesive deposited on the crests of the corrugations thus formed.

Le bâti d'une telle station comprend une base flanquée de deux parois latérales dont les bords avant supportent les deux cylindres cannelés et le cylindre presseur inférieur qui constituent, en quelque sorte, une paroi frontale. Entre les deux parois latérales est située l'unité d'encollage dont le rouleau encolleur frontal est amené avec un écart très précis proche de la partie inférieure arrière du second rouleau cannelé inférieur. Cette unité d'encollage est usuellement montée sur rails afin de pouvoir la sortir par l'arrière de la station pour nettoyage, entretien et réparation, et également pour permettre l'accès aux cylindres, par l'arrière, pour des opérations identiques.The frame of such a station comprises a base flanked by two side walls, the front edges of which support the two grooved cylinders and the lower pressure cylinder which constitute, as it were, a front wall. Between the two side walls is located the gluing unit whose front gluing roller is brought with a very precise gap close to the rear lower part of the second lower grooved roller. This gluing unit is usually mounted on rails in order to be able to take it out from the rear of the station for cleaning, maintenance and repair, and also to allow access to the cylinders, from the rear, for identical operations.

Une technique récente pour maintenir correctement plaqué le papier ondulé dans les cannelures de la partie arrière du second cylindre, où s'effectue l'encollage, consiste à fermer la partie supérieure de la station par une plaque, la face arrière par une porte, et à pressuriser le volume interne ainsi défini à une pression pneumatique de l'ordre de 50 à 60 millibars. Bien évidemment, cette porte doit toujours pouvoir être réouverte afin de permettre la sortie de l'unité d'encollage lorsque nécessaire, ce qui pose pour cette porte un double problème de verrouillage et d'étanchéité.A recent technique for correctly maintaining the corrugated paper in the grooves in the rear part of the second cylinder, where gluing takes place, consists in closing the upper part of the station with a plate, the rear face with a door, and in pressurizing the internal volume thus defined at a pneumatic pressure of in the range of 50 to 60 millibars. Obviously, this door must always be able to be reopened in order to allow the gluing unit to exit when necessary, which poses a double locking and sealing problem for this door.

On connaît une porte arrière de station "simple face" qui est montée sur une paire de rails pour translation orthogonale et qui, par analogie à des portes de coffres-forts, présente une première partie avant de dimensions légèrement inférieures à l'ouverture du cadre et un rebord arrière de dimensions supérieures. La première partie de cette porte est complétée d'une série de loquets situés dans un plan vertical et qui sont prévus pour pénétrer dans des orifices aménagés dans la tranche interne de l'ouverture. La face verticale avant du rebord arrière est garnie d'un joint élastomère venant se plaquer contre la face arrière du cadre de l'ouverture. Ainsi, lors de la fermeture de cette porte, il est nécessaire de d'abord la pousser fermement contre le cadre pour écraser le joint d'étanchéité et pour amener les loquets en correspondance avec les ouvertures avant de pouvoir tourner une manivelle pour enclencher ces loquets. Cette opération de fermeture est donc quelque peu difficile pour les opérateurs, surtout en raison du fait de l'utilisation d'un dispositif mécanique démultiplicateur d'actionnement des loquets. En effet, l'existence du dispositif mécanique démultiplicateur permet de retirer les loquets alors qu'une surpression existe encore dans le volume interne. Il est donc nécessaire de prévoir un dispositif de sécurité complémentaire indépendant pour prévenir une erreur de manipulation susceptible de créer une situation dangereuse pour l'opérateur.There is a known "single sided" rear station door which is mounted on a pair of rails for orthogonal translation and which, by analogy to safe doors, has a first front part of dimensions slightly smaller than the opening of the frame. and a rear rim of larger dimensions. The first part of this door is completed by a series of latches situated in a vertical plane and which are intended to penetrate into orifices arranged in the internal section of the opening. The vertical front face of the rear rim is provided with an elastomeric seal which is pressed against the rear face of the opening frame. Thus, when closing this door, it is necessary to first push it firmly against the frame to crush the seal and to bring the latches in correspondence with the openings before being able to turn a crank to engage these latches . This closing operation is therefore somewhat difficult for operators, especially due to the fact of the use of a mechanical device for actuating the latches. Indeed, the existence of the mechanical multiplier device makes it possible to remove the latches while an overpressure still exists in the internal volume. It is therefore necessary to provide an independent complementary safety device to prevent a handling error likely to create a dangerous situation for the operator.

Le but de la présente invention est une porte pour station "simple face" qui incorpore de par sa conception un dispositif de sécurité à l'ouverture en cas de surpression rémanente dans le volume interne. De plus, le système de verrouillage doit être plus simple à manipuler, tant à l'ouverture qu'à la fermeture. Enfin, il serait souhaitable que le dispositif d'étanchéité, qui ne doit en fait supporter qu'une faible surpression pneumatique, soit de conception plus fiable et notamment insensible à la position finale de la porte dans le cadre.The object of the present invention is a "single-sided" station door which, by design, incorporates a safety device upon opening in the event of residual pressure in the internal volume. In addition, the locking system must be easier to handle, both when opening and closing. Finally, it would be desirable for the sealing device, which should in fact only support a slight pneumatic overpressure, to be of a more reliable design and in particular insensitive to the final position of the door in the frame.

Ces buts sont réalisés grâce à une porte constituée d'un panneau de dimensions extérieures légèrement inférieures aux dimensions intérieures d'un cadre dans lequel ce panneau doit s'engager, le pourtour de la tranche de ce panneau ayant une épaisseur différente de l'épaisseur du cadre et étant garni d'un joint d'étanchéité périphérique venant prendre appui contre le pourtour interne du cadre, la porte comportant des rails, solidaires du panneau, sur la face interne duquel ils sont fixés au moyen d'équerres, les rails étant agencés de façon à pouvoir glisser dans des coulisses aménagées dans une base d'un bâti de la station et munis, à l'une de leurs extrémités d'une pièce d'arrêt destinée à limiter la course arrière de la porte lors de leur arrivée en contact avec des butées, lesdits rails supportant une unité d'encollage, de la station, pouvant se déplacer sur ceux-ci par l'intermédiaire de galets, la porte comprenant également des moyens de verrouillage comprenant au moins un crochet fixé perpendiculairement contre la face interne du panneau de la porte, ce crochet pouvant être soulevé, lorsque désiré, dans un plan vertical par un dispositif pour enclencher le crochet sur un axe de verrouillage solidaire du cadre, la partie frontale de l'encoche interne du crochet présentant une courbure dirigée en direction de la face du panneau.These goals are achieved by a door consisting of a panel of external dimensions slightly smaller than the internal dimensions of a frame in which this panel must engage, the periphery of the edge of this panel having a thickness different from the thickness. of the frame and being furnished with a peripheral seal coming to bear against the internal periphery of the frame, the door comprising rails, integral with the panel, on the internal face of which they are fixed by means of brackets, the rails being arranged so as to be able to slide in slides arranged in a base of a station frame and provided, at one of their ends with a stop piece intended to limit the rear stroke of the door when they arrive in contact with abutments, said rails supporting a gluing unit, from the station, being able to move thereon by means of rollers, the door also comprising means of v interlocking comprising at least one fixed hook perpendicularly against the internal face of the door panel, this hook being able to be lifted, when desired, in a vertical plane by a device to engage the hook on a locking pin secured to the frame, the front part of the internal notch of the hook having a curvature directed towards the face of the panel.

Grâce à cet agencement du panneau, du cadre et du joint d'étanchéité, la porte peut quelque peu couplisser, sur une distance de trois à quatre centimètres, à l'intérieur du cadre à la manière d'un piston dans un cylindre sans perdre son étanchéité. Par contre, la courbure, dirigée en direction de la face du panneau, de la partie frontale de l'encoche interne du crochet fait que, lors de la mise sous pression du volume interne, la porte est amenée à partir légèrement en arrière rendant impossible tout soulèvement du crochet tant que cette surpression n'a pas totalement disparu. Le dégagement des crochets n'est donc possible qu'après une réinsertion vers l'avant de cette porte.Thanks to this arrangement of the panel, the frame and the seal, the door can somewhat couple, over a distance of three to four centimeters, inside the frame like a piston in a cylinder without losing its tightness. On the other hand, the curvature, directed in the direction of the face of the panel, of the front part of the internal notch of the hook means that, when the internal volume is pressurized, the door is brought to start slightly behind making it impossible any lifting of the hook until this overpressure has not completely disappeared. The release of the hooks is therefore only possible after reinserting the front of this door.

Le joint d'étanchéité peut être constitué d'un bourrelet plus ou moins creux en élastomère ou en plastique souple, ou d'une série de galets longitudinaux repoussés par des moyens de rappel internes ou tout autre type de joint s'écrasant suffisamment pour autoriser l'insertion du panneau dans le cadre sans difficulté. Toutefois, suite à de nombreux essais en atelier, il s'est avéré qu'une solution particulièrement avantageuse consiste à monter des brosses le long du pourtour de la porte, de telle sorte que leurs poils émergent de la tranche.The seal may consist of a more or less hollow bead of elastomer or flexible plastic, or of a series of longitudinal rollers pushed back by internal return means or any other type of seal which will crush enough to allow inserting the panel into the frame without difficulty. However, following numerous tests in the workshop, it has turned out that a particularly advantageous solution consists in mounting brushes along the periphery of the door, so that their bristles emerge from the edge.

Utilement, la partie inférieure frontale du crochet peut être orientée obliquement vers le bas pour être soulevée automatiquement par l'axe de verrouillage solidaire du cadre, cela avant la retombée du crochet et son enclenchement sur l'axe de verrouillage, lors de la fermeture de la porte.Usefully, the lower front part of the hook can be oriented obliquely downwards to be lifted automatically by the axis of integral locking of the frame, this before the fall of the hook and its engagement on the locking pin, when the door is closed.

Avantageusement, la porte comprend un crochet de chaque côté pour une meilleure répartition des efforts de maintien, le dispositif de soulèvement des crochets comportant alors un axe horizontal monté, de façon mobile en rotation, contre la face interne de la porte par des paliers, cet axe horizontal étant relié par chacune de ses extrémités à l'un des crochets permettant ainsi de leur imprimer simultanément un mouvement en rotation vers le haut ou vers le bas.Advantageously, the door comprises a hook on each side for a better distribution of the holding forces, the hook lifting device then comprising a horizontal axis mounted, movably in rotation, against the internal face of the door by bearings, this horizontal axis being connected by each of its ends to one of the hooks thus making it possible to simultaneously impart to them a movement in rotation upwards or downwards.

Mieux encore, la porte peut comprendre une paire verticale de crochets de chaque côté, les crochets inférieur et supérieur d'une paire latérale étant reliés par une barre verticale et l'axe horizontal du dispositif de soulèvement des crochets étant complété à chaque extrémité par un bras sensiblement horizontal dont l'extrémité est reliée à la barre verticale correspondante de façon à ce que le mouvement de rotation partiel de l'axe horizontal soit transmis à chacun des crochets.More preferably, the door may include a vertical pair of hooks on each side, the lower and upper hooks of a side pair being connected by a vertical bar and the horizontal axis of the hook lifter being supplemented at each end by a substantially horizontal arm whose end is connected to the corresponding vertical bar so that the partial rotational movement of the horizontal axis is transmitted to each of the hooks.

On pourrait envisager de tourner l'axe horizontal du dispositif de soulèvement des crochets directement au moyen d'un levier traversant la porte par une fente garnie de brosses. Toutefois, un meilleur dispositif comprend un bras central sensiblement vertical solidaire de l'axe horizontal de ce dispositif de soulèvement des crochets, l'autre extrémité de ce bras central étant reliée, mobile en rotation, à un levier de commande horizontal traversant la porte. Ce levier de commande n'effectuant qu'un mouvement de translation longitudinal, il peut donc traverser cette porte au-travers d'un simple orifice, ce qui limite grandement les pertes de pression.One could consider turning the horizontal axis of the hook lifting device directly by means of a lever passing through the door through a slot furnished with brushes. However, a better device comprises a substantially vertical central arm secured to the horizontal axis of this hook lifting device, the other end of this central arm being connected, movable in rotation, to a horizontal control lever passing through the door. This control lever performing only a longitudinal translation movement, it can therefore pass through this door through a simple orifice, which greatly limits pressure losses.

L'invention sera mieux comprise à l'étude d'un mode de réalisation, pris à titre d'exemple nullement limitatif, et décrit par les dessins annexés dans lesquels :

  • la figure 1 est une vue en coupe longitudinale d'une station "simple face" munie d'une porte sel on l'invention,
  • la figure 2 est une vue en perspective d'une porte montrant en détail le dispositif de soulèvement des crochets et,
  • la figure 3 est une vue représentant l'un des crochets.
The invention will be better understood on studying an embodiment, taken by way of non-limiting example, and described by the appended drawings in which:
  • FIG. 1 is a view in longitudinal section of a "single-sided" station provided with a salt door according to the invention,
  • FIG. 2 is a perspective view of a door showing in detail the device for lifting the hooks and,
  • Figure 3 is a view showing one of the hooks.

Sur la figure 1 est illustrée, en coupe, une station "simple face" 10 dont on reconnaît dans la partie frontale, c'est-à-dire dans la partie gauche de la figure 1, les deux cylindres cannelés supérieur 1 et inférieur 3 avec, en bas, le cylindre presseur 5. Le bâti 11 de cette station comprend une base horizontale flanquée de deux parois latérales 4 fermées en haut par un couvercle. Le cadre arrière 18 est délimité en haut par une traverse 6, de chaque côté par les bords arrières des parois latérales 4, et en bas par une plaque horizontale 6', ces divers éléments délimitant un volume interne V de la station simple face 10. Une unité d'encollage 20, dont le rouleau frontal d'encollage 7, presque en contact avec la partie arrière du cylindre cannelé inférieur 5, est logée dans ce volume interne V. L'unité d'encollage 20 repose, par l'intermédiaire de galets 2, sur des rails 8.In FIG. 1 is illustrated, in section, a "single-sided" station 10 of which we recognize in the front part, that is to say in the left part of FIG. 1, the two upper fluted cylinders 1 and lower 3 with, at the bottom, the pressing cylinder 5. The frame 11 of this station comprises a horizontal base flanked by two side walls 4 closed at the top by a cover. The rear frame 18 is delimited at the top by a cross-member 6, on each side by the rear edges of the side walls 4, and at the bottom by a horizontal plate 6 ′, these various elements delimiting an internal volume V of the single-sided station 10. A gluing unit 20, of which the front gluing roller 7, almost in contact with the rear part of the lower grooved cylinder 5, is housed in this internal volume V. The gluing unit 20 rests, via rollers 2, on rails 8.

Comme on peut mieux l'observer sur les figures 1 et 2, la porte de fermeture arrière 15 est essentiellement constituée d'un panneau 16 supporté par une entretoise 17 aux extrémités de laquelle sont montées des roulettes 19. Le panneau 16 est équipé avec des équerres 14 fixées sur les rails 8 qui sont agencés de façon à pouvoir coulisser dans des coulisses aménagées dans la base du bâti 11 de la station 10. Comme on peut le constater sur la figure 1, les dimensions externes du panneau 16 de la porte 15 sont très légèrement inférieures, de l'ordre de 5 à 10 millimètres, aux dimensions internes du cadre arrière 18 du bâti 11 décrit précédemment.As can best be seen in Figures 1 and 2, the rear closing door 15 essentially consists of a panel 16 supported by a spacer 17 at the ends of which are mounted rollers 19. The panel 16 is equipped with brackets 14 fixed on the rails 8 which are arranged so as to be able to slide in slides arranged in the base of the frame 11 of the station 10 As can be seen in FIG. 1, the external dimensions of the panel 16 of the door 15 are very slightly smaller, of the order of 5 to 10 millimeters, than the internal dimensions of the rear frame 18 of the frame 11 described above.

L'étanchéité, entre la surpression pneumatique régnant à l'intérieur du volume interne V de la station simple face 10 et l'air atmosphérique extérieur, est réalisée ici par des brosses horizontales supérieure 72, inférieure 74 et par des brosses latérales 76 rapportées par vissage ou rivetage le long du pourtour externe du cadre 16 de la porte 15, les poils de ces brosses supérieure 72, inférieure 74 et latérales étant orientés vers l'extérieur. Avantageusement, ces brosses sont réalisées en fil de nylon présentant une rigidité suffisante même après de longues périodes d'utilisation.The seal between the pneumatic overpressure prevailing inside the internal volume V of the single-sided station 10 and the outside atmospheric air is produced here by upper horizontal brushes 72, lower 74 and by lateral brushes 76 reported by screwing or riveting along the outer periphery of the frame 16 of the door 15, the bristles of these upper 72, lower 74 and lateral brushes being oriented towards the outside. Advantageously, these brushes are made of nylon wire having sufficient rigidity even after long periods of use.

Comme on peut mieux l'observer sur la figure 2, le dispositif de verrouillage de la porte 15 comprend quatre crochets 30, répartis par paire dans la hauteur du panneau 16, chacun des crochets 30 étant monté sensiblement au voisinage de chacun des quatre coins du panneau 16 de la porte 15. Ainsi que représenté sur la figure 3, chaque crochet 30 est monté sur un support 39 en étant orienté perpendiculairement à la porte 15 et cela de manière mobile en rotation, dans un plan vertical, autour d'un pivot 50. Les crochets 30 d'une paire latérale, tels que représentés sur la figure 2, sont reliés entre eux par une tirette verticale 34 dont chaque extrémité est reliée à son crochet 30 respectif par un pivot de rotation.As can best be seen in FIG. 2, the door locking device 15 comprises four hooks 30, distributed in pairs in the height of the panel 16, each of the hooks 30 being mounted substantially in the vicinity of each of the four corners of the panel 16 of the door 15. As shown in FIG. 3, each hook 30 is mounted on a support 39 while being oriented perpendicularly to the door 15 and this is movable in rotation, in a vertical plane, around a pivot 50. The hooks 30 of a lateral pair, as shown in FIG. 2, are interconnected by a pull tab vertical 34, each end of which is connected to its respective hook 30 by a pivot.

De plus, les deux paires de crochets 30, reliés par les tirettes verticales 34 sont également couplées par un axe horizontal 40 monté, sur la face interne du panneau 16 de la porte 15, dans des paliers 38, constitués en l'occurrence de simples plaques trouées et soudées contre le panneau 16. Chaque extrémité de cet axe 40 est complétée d'un bras 36, sensiblement horizontal, les extrémités de ces bras 36 étant reliées par un pivot à la barre verticale correspondante 34.In addition, the two pairs of hooks 30, connected by the vertical pulls 34 are also coupled by a horizontal axis 40 mounted, on the internal face of the panel 16 of the door 15, in bearings 38, constituted in this case of simple perforated and welded plates against the panel 16. Each end of this axis 40 is completed by an arm 36, substantially horizontal, the ends of these arms 36 being connected by a pivot to the corresponding vertical bar 34.

Cet axe horizontal 40 est également complété d'un bras central 42, de préférence orienté vers le bas, dont l'extrémité est reliée, également par un pivot, à un levier de commande 44 traversant horizontalement le panneau 16 de la porte 15 au travers d'un orifice dont les dimensions sont juste suffisantes pour permettre une translation de ce levier sans perte de pression pneumatique.This horizontal axis 40 is also completed with a central arm 42, preferably oriented downwards, the end of which is connected, also by a pivot, to a control lever 44 horizontally passing through the panel 16 of the door 15 through an orifice whose dimensions are just sufficient to allow translation of this lever without loss of pneumatic pressure.

Comme on peut l'observer sur la figure 1, chaque crochet 30 présente une encoche interne 33 prévue pour venir s'engager sur un axe de verrouillage 32 situé, en correspondance, dans la paroi latérale 4 du bâti 11 de la station 10. Plus particulièrement, la partie frontale de cette encoche interne 33 présente une forte courbure vers l'avant de telle sorte que, une fois ces crochets 30 engages sur les axes 32 et la porte 15 étant repoussée en arrière par la surpression régnant dans la station 10, ces crochets 30 entourent complètement l'axe de verrouillage 32 et ne peuvent plus être soulevés directement, empêchant ainsi tout déplacement intempestif vers l'arrière de la porte 15.As can be seen in Figure 1, each hook 30 has an internal notch 33 provided to engage on a locking pin 32 located, in correspondence, in the side wall 4 of the frame 11 of the station 10. More in particular, the front part of this internal notch 33 has a strong curvature towards the front so that, once these hooks 30 engage on the axes 32 and the door 15 being pushed back by the overpressure prevailing in the station 10, these hooks 30 completely surround the locking pin 32 and can no longer be lifted directly, thus preventing any untimely movement towards the rear of the door 15.

De plus, la face inférieure frontale de chaque crochet 30 est obliquement orientée vers le bas avec la partie supérieure plus haute que l'axe de verrouillage 32. Comme on peut aisément le comprendre, la fermeture de cette porte 15 est particulièrement aisée car, une fois l'unité d'encollage 20 roulée à l'intérieur de la station 10, il suffit de pousser cette porte 15, les rails 8 coulissant à l'intérieur de leur coulisses situées dans le bâti 11, jusqu'à ce que les crochets 30 rencontrent les axes verrouillage 32. Grâce à la partie oblique frontale de ces crochets 30', ceux-ci se soulèveront automatiquement jusqu'à ce que les encoches internes 33 arrivent au niveau de ces axes, les crochets 30 retombant immédiatement de par leur poids sur les axes de verrouillage 32.In addition, the front bottom face of each hook 30 is obliquely oriented downwards with the upper part higher than the locking pin 32. As can easily be understood, the closing of this door 15 is particularly easy because, once the gluing unit 20 is rolled inside the station 10, just push this door 15, the rails 8 sliding inside their slides located in the frame 11, until the hooks 30 meet the locking pins 32. Thanks to the oblique front portion of these hooks 30 ' , these will be lifted automatically until the internal notches 33 arrive at these axes, the hooks 30 falling immediately by their weight on the locking axes 32.

Lors de cette avancée, la porte 15 a pénétré dans le cadre 18, et les brosses 72, 74 et 76 ont pris appui contre les faces internes correspondantes du cadre 18; notamment la brosse inférieure 74 contre la plaque 6', la brosse supérieure 72 contre la traverse 6 et les brosses latérales 76 contre chacune des parois 4. Cette opération d'introduction est notablement assistée par l'inertie venant de la masse générale de cette porte 15.During this advance, the door 15 has entered the frame 18, and the brushes 72, 74 and 76 are supported against the corresponding internal faces of the frame 18; in particular the lower brush 74 against the plate 6 ', the upper brush 72 against the cross-member 6 and the side brushes 76 against each of the walls 4. This insertion operation is notably assisted by the inertia coming from the general mass of this door 15.

Lorsque la surpression pneumatique est appliquée dans la station 10, la porte 15 effectue un léger recul, de l'ordre d'un centimètre, correspondant à la courbure interne des crochets. Ce mouvement de recul ne remet nullement en cause l'étanchéité assurée par les brosses qui ont pu coulisser d'une même distance par rapport aux faces internes correspondantes du cadre 18, cela à la manière d'un piston, équipé de segments, se déplaçant dans son cylindre.When the pneumatic overpressure is applied in the station 10, the door 15 recedes slightly, of the order of a centimeter, corresponding to the internal curvature of the hooks. This backward movement in no way calls into question the seal provided by the brushes which have been able to slide the same distance relative to the corresponding internal faces of the frame 18, this in the manner of a piston, fitted with segments, moving in its cylinder.

Lorsque l'on souhaite ouvrir cette porte 15, il est nécessaire que le rétablissement complet de la pression atmosphérique à l'intérieur de la station 10 soit effective, sans quoi il est impossible de pousser plus en avant la porte 15 pour la dégager des crochets 30. En effet, la force résultant de la surpression sur la totalité de la surface de cette porte est bien trop importante pour qu'une telle opération puisse s'effectuer. Il est donc impossible, pour un opérateur, d'ouvrir la porte avant que la pression atmosphérique ne soit établie complètement dans la station 10. La pression atmosphérique ayant été établie dans la station 10, il sera tout à fait possible de pousser la porte 15 en avant, et on pourra alors agir sur le levier de commande 44, comme illustré sur la figure 2, par un mouvement dans le sens indiqué par la flèche (a), ce qui engendrera une rotation, selon la direction indiquée par la flèche (b), du bras central 42 et par là une rotation, selon la flèche (c), de l'axe horizontal 40 ce qui provoquera une montée, dans le sens indiqué par la flèche (d), des deux barres verticales 34 assurant finalement une rotation, selon le sens indiqué par la flèche (e), simultanée des quatre crochets 30. A cet instant seulement, la porte 15 pourra alors être tirée en arrière.When it is desired to open this door 15, it is necessary that the complete restoration of the atmospheric pressure inside the station 10 is effective, without which it is impossible to push the door 15 further to release it from the hooks 30. In fact, the force resulting from the overpressure on the entire surface of this door is far too great for such a operation can be performed. It is therefore impossible, for an operator, to open the door before the atmospheric pressure is completely established in the station 10. The atmospheric pressure having been established in the station 10, it will be quite possible to push the door 15 forward, and we can then act on the control lever 44, as illustrated in FIG. 2, by a movement in the direction indicated by the arrow (a), which will generate a rotation, in the direction indicated by the arrow ( b), the central arm 42 and thereby a rotation, according to arrow (c), of the horizontal axis 40 which will cause a rise, in the direction indicated by arrow (d), of the two vertical bars 34 finally ensuring a rotation, in the direction indicated by the arrow (e), simultaneous of the four hooks 30. At this instant only, the door 15 can then be pulled back.

Comme on a pu le constater à la lecture de cet exposé, la conception relativement simple du système de verrouillage et d'étanchéité de cette porte 15 assure une meilleure sécurité d'utilisation de la machine, en cas de surpression rémanente dans la station 10, en empêchant l'ouverture intempestive de celle-ci, et en autorisant une fermeture aisée et sûre de la station 10 par simple poussée sur la porte 10.As we have seen on reading this presentation, the relatively simple design of the locking and sealing system of this door 15 ensures better safety in the use of the machine, in the event of residual overpressure in station 10, by preventing the untimely opening of the latter, and by authorizing an easy and safe closing of the station 10 by a simple push on the door 10.

De nombreuses améliorations peuvent être apportées à cette porte dans le cadre de cette invention.Many improvements can be made to this door as part of this invention.

Claims (6)

  1. Door for the single-face station of a machine that produces corrugated cardboard; and particularly a rear door (15) fitted on rails (8) and closing the inner volume (V) of the single-face station (10) in such a way that the said inner volume (V) may be set under pneumatic pressure; characterized by the fact that it includes a panel (16) with outer dimensions slightly smaller than the inner ones of a framework (18) in which this panel (16) has to engage, the periphery of the section of this panel (16) having a thickness different from the one of the framework (18) and being provided with a peripherical tightening seal (72, 74, 76) resting on the inner periphery of the framework (18), by the fact that it includes rails (8) which are permanently fitted on the panel (16) no the inner side of which they are fitted by means of square-pieces (14), the rails (8) being arranged so as to slide in the runners arranged in the stand (53) of a frame (11) of the station (10) and provided at one of their ends with a stopping piece (51) destined to limit the backward motion of the door (15) when they get in contact with the stops (52), the said rails (8) supporting a gluing unit (20) of the station (10) that is able to slide on the latter rails by means of rollers (2), and by the fact that it comprises interlocking means including at least a hook (30) fitted perpendicularly on the inner side of the panel (16) of the door (15), this hook (30) being liftable, if required, in a vertical plane by means of a device for engaging the hook (30) on an interlocking axle (32) permanently fitted on the framework (18), the front part of the inner notch (33) of the hook having a curvature directed towards the side of the pannel (16).
  2. Door according to claim 1, characterized by the fact that its tightening seal consists of brushes (72, 74, 76) fitted on the periphery of the door in such a way that the bristles of these brushes (72, 74, 76) will protrude from the section of the door.
  3. Door according to claim 1, characterized by the fact that the hook (30) has a lower front part (31) orientated obliquely downward in order to be lifted automatically by the interlocking axle (32) before its fall and its engagement on the interlocking axle (32) during the shuting process of the door (15), the curvature of the inner notch (33) of the hook (30) associated with the interlocking axle (32) rendering impossible any lifting of the hook (30) as long as a pneumatic pressure exists in the inner volume (V) of the single-fare station.
  4. Door according to claim 1, characterized by the fact that it includes at least a hook (30) on either side and a device for lifting the hooks (30) comprising a horizontal axle (40) fitted rotatable on the inner side of the panel (16) of the door (15) into bearings (38), this horizontal axle (40) being connected on either end to one of the hooks (30) enabling thus to impart to them an upward rotary movement.
  5. Door according to claim 4, characterized by the fact that it includes a vertical pair of hooks (30) on either side, the lower and upper hooks of a lateral pair being connected by means of a vertical bar (34), and the horizontal axle (40) of the device for lifting the hooks being completed at each end with an arm (36) almost horizontal whose end is connected to the corresponding vertical bar (34) in such a way that the rotary movement of the horizontal axle (40) will be transmitted to each of the hooks (30).
  6. Door according to claim 5, characterized by the fact that the horizontal axle (40) of the device for lifting the hooks (30) comprises a central arm (42) almost vertical and permanently fitted on the horizontal axle (40) at one of its ends whereas its other end is rotarily connected to a horizontal control lever (44) intercrossing the door (15), this control lever (44) effectuating only a lengthwise translational movement.
EP19930109522 1992-06-19 1993-06-15 Door for the single-facer section of a corrugated cardboard making machine Expired - Lifetime EP0574875B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH193792 1992-06-19
CH1937/92 1992-06-19

Publications (2)

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EP0574875A1 EP0574875A1 (en) 1993-12-22
EP0574875B1 true EP0574875B1 (en) 1996-03-13

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EP19930109522 Expired - Lifetime EP0574875B1 (en) 1992-06-19 1993-06-15 Door for the single-facer section of a corrugated cardboard making machine

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EP (1) EP0574875B1 (en)
JP (1) JPH0818388B2 (en)
DE (1) DE69301777T2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9580946B2 (en) * 2015-07-22 2017-02-28 Provisur Technologies, Inc. Screw conveyor having linked latch closure
CN106003844B (en) * 2016-05-26 2018-06-26 佛山市富利包装机械有限公司 A kind of Corrugating Machine integral type wallboard and its roll change mechanism
CN109051393B (en) * 2018-08-15 2024-09-06 四川宏华石油设备有限公司 Flexible water tank locking device
CN109051394B (en) * 2018-08-15 2024-09-06 四川宏华石油设备有限公司 Flexible water tank locking device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970718A (en) * 1959-09-28 1961-02-07 Everest & Jennings Sterilizer door
GB1459411A (en) * 1973-02-28 1976-12-22 Hillier C N Pressure vessels
US3844597A (en) * 1973-08-29 1974-10-29 D Elrod Safety latch
DE3439227A1 (en) * 1984-10-26 1986-04-30 Werner H.K. Peters Maschinenfabrik Gmbh, 2000 Hamburg APPLICATION WORK FOR A CARDBOARD PLANT
US4941695A (en) * 1989-05-18 1990-07-17 Pullman Leasing Company Hatch cover assembly
US5160400A (en) * 1990-05-24 1992-11-03 United Container Machinery Group, Inc. Corrugating apparatus having a liquid filled seal roll
US5110396A (en) * 1990-06-14 1992-05-05 The Langston Corporation Floating air seal for an apparatus for manufacturing single faced corrugated board
GB2247032B (en) * 1990-07-13 1994-02-16 Simon Container Mach Ltd Apparatus for manufacturing single-faced corrugated board
US5145549A (en) * 1991-08-19 1992-09-08 Bhs-Bayerische Berg-, Hutten-Und Salzwerke Ag Apparatus for producing one-sided corrugated paperboard

Also Published As

Publication number Publication date
DE69301777D1 (en) 1996-04-18
EP0574875A1 (en) 1993-12-22
JPH0818388B2 (en) 1996-02-28
JPH06340012A (en) 1994-12-13
DE69301777T2 (en) 1996-08-08
US5360505A (en) 1994-11-01

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