EP0765195A1 - Device for selecting cut paperboard blanks - Google Patents

Device for selecting cut paperboard blanks

Info

Publication number
EP0765195A1
EP0765195A1 EP96913572A EP96913572A EP0765195A1 EP 0765195 A1 EP0765195 A1 EP 0765195A1 EP 96913572 A EP96913572 A EP 96913572A EP 96913572 A EP96913572 A EP 96913572A EP 0765195 A1 EP0765195 A1 EP 0765195A1
Authority
EP
European Patent Office
Prior art keywords
belt
flap
path
blanks
strand
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.)
Granted
Application number
EP96913572A
Other languages
German (de)
French (fr)
Other versions
EP0765195B1 (en
Inventor
Jean-Pierre Roux
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.)
Komori Chambon SA
Original Assignee
Komori Chambon 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 Komori Chambon SA filed Critical Komori Chambon SA
Publication of EP0765195A1 publication Critical patent/EP0765195A1/en
Application granted granted Critical
Publication of EP0765195B1 publication Critical patent/EP0765195B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07CPOSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C3/00Sorting according to destination
    • B07C3/02Apparatus characterised by the means used for distribution
    • B07C3/06Linear sorting machines in which articles are removed from a stream at selected points
    • B07C3/065Linear sorting machines in which articles are removed from a stream at selected points construction of switches therefor
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S209/00Classifying, separating, and assorting solids
    • Y10S209/90Sorting flat-type mail

Definitions

  • the present invention relates to a device intended for carrying out a selection of blanks of cardboard cut out on a dispensing machine, in particular in order to eliminate from a stream of products those which are considered to be defective.
  • the present invention relates in particular to a selection device making it possible to significantly improve the selection rate.
  • sorters able to sort products of around 30 cm in length have thus been used on the move with a speed of the order
  • SUBSTITUTE RULE RULE 26 180 m / mm which represents a selection of 600 products per minute. Under such conditions it is estimated that the reliability of the sorting is of the order of 99.7%.
  • the object of the present invention is to propose a selection device able to improve both the number of possible selections per minute as well as the reliability thereof.
  • the present invention thus relates to a device for selecting cardboard blanks cut during their movement between at least two series of drive belts, defining two paths for the blanks, namely an upper path and a lower path forming a bifurcation angle
  • this device comprising path selection means, consisting of a flap arranged in the bifurcation angle of the two paths, and which is mounted to pivot about a downstream axis, capable of occupying two positions, namely a lower position, or normal operating position, which directs the blanks towards the upper path and an upper position, or selection position, which directs the blanks towards the lower path, characterized in that: the upper path of the drive belts blanks, at least in the upstream and downstream parts close to the pivoting flap, form a curve whose radius of curvature is substantially uniform, the post face and higher than the flap has a curvature close to that of the belt it is greater, so that in the selection position, it defines therewith a substantially parallel path.
  • the concavity of the curve is oriented on the side of the flap and the front part of the upper face of the flap curves downward.
  • the lower path of the blank drive belts forms a curve whose radius of curvature is substantially uniform, the concavity of the curve preferably being oriented on the side opposite the flap.
  • the lower face of the flap may have a curvature close to that of the belt which is lower therein, so that, in the normal operating position, it defines therewith a substantially parallel path.
  • the device according to the invention preferably comprises means capable of holding the cardboard blank, at least when it passes through the flap, on at least part of its surface, between two holding elements, one of which at least consists of a belt strand.
  • the other holding element can be constituted by another strand of belt or by a roller.
  • the device comprises at least four belts which define the two upper and lower paths.
  • upstream of the flap, a first portion of the lower strand of a first belt or upper belt, and a first portion of the upper strand of a second belt, or lower belt are in contact, and downstream of the flap a second portion of the lower strand of the first belt is in contact with the upper strand of a third belt and a second portion of the upper strand of the second belt is in contact with the lower strand of a fourth belt.
  • An upper strand of the fourth belt may also be in contact with the lower strand of the third belt.
  • Each module will thus include its own mechanical drive system, consisting in particular of four belts, and its own selection system, consisting of a pivotally mounted flap.
  • This flap can be mounted on a lever movable around a downstream axis of rotation under the action of a jack controlled by a rapid pneumatic valve supplied by a pressurized air tank. It is thus particularly easy to modify the relative positioning of several modules according to the different specific applications of the device.
  • all the mechanical elements of the device can be arranged on a plate unique so as to constitute an adjustable and positionable module independently.
  • Figure 1 is a schematic plan view showing the operating principle of a selector device according to the invention.
  • FIG. 2 is a diagram illustrating the operation of the selection means used in the device according to the invention.
  • Figures 3a and 3b are enlarged partial vertical and longitudinal sections showing the bifurcation zone of the two paths and the selection flap in the upper and lower positions respectively.
  • FIG. 4 is a schematic plan view of a variant of the embodiment shown in FIG. 1.
  • Figure 5 is a perspective view of the variant shown in Figure 4, the selection means being removed.
  • the device according to the invention essentially consists of four belts arranged symmetrically two by two with respect to a longitudinal axis xx '.
  • the first and second upper 1 and lower 2 belts respectively are wound on rolls 5.5a and 7.7a so as to form an upper loop and a loop which are symmetrical with respect to the axis xx '.
  • the two loops from upstream to downstream, comprise a first zone in which two strands of belt la and 2a, disposed respectively between two rollers 5a, 5b and 7a, 7b are rectilinear and in contact with one another along axis xx '.
  • a second zone is defined by three respective rollers 5b, 7b which give the two following belt strands 1b and 2b on the one hand a spacing and on the other hand a regular curvature whose concavity is directed upwards and downwards respectively .
  • the device also comprises a third belt 3 whose upper strand 3a is in contact with the strand 1b of the first belt 1, so as to match the curvature thereof, and a fourth belt 4 whose lower strand 4a is in contact with the strand 2b of the second belt 2, so as to match its curvature.
  • These belts are driven in rotation by motors, not shown in the drawing. They are slaved to each other, for example, by means of notches, so that their displacement speeds are as close as possible so as to avoid any sliding.
  • the direction of rotation of the belts is as shown by the arrows in FIG. 1, namely a rotation in the clockwise direction for the belts 1 and 4 and a rotation in the opposite direction for the belts 2 and 3.
  • the device also includes selection means, consisting of a flap 6 mounted pivoting around a downstream axis O parallel to the axes of rotation of the rollers 5 and 7.
  • This flap 6 is capable of occupying two positions, namely a low position, or normal operating position (which corresponds for example to the passage of correct blanks), and a high position, or selection position (which corresponds for example to a defective blank selection position).
  • the upper face of the flap 6 has a curvature whose concavity is oriented upwards and its radius of curvature is such that, in the low position, it defines with the belt strand lb which is above it a parallel path.
  • the underside of the flap 6 has a curvature whose concavity is oriented downwards and its radius of curvature is such that, in the high position, it defines with the belt strand 2b which is below it a parallel path.
  • the Applicant has found that by giving the upper path followed by the cardboard blank, or normal operating path, a regular curvature in the upstream and downstream vicinity of the selection flap 6 and by giving the posterior part of the upper face of that -when a curve close to that of the belt which was higher, it was possible to greatly increase the number of cardboard blanks selectable by the device. Indeed with the devices of the prior art it was possible to control the passage of about 600 blanks per minute with a number of operating incidents of the machine (stuffing) of about one in 24 hours of operation. The device according to the invention made it possible to control the passage of 1000 blanks of cardboard per minute with only a single incident in 800 hours of operation.
  • the shutter 6 is normally in the low position, but it is likely to move to the high position each time a blank to be selected is detected.
  • This detection is carried out by an anomaly detector 10 which can be of any type appropriate to the parameter that one wishes to control.
  • the detector 10 is disposed at a distance d from the flap 6 which is sufficient so that, taking into account the speed of movement of the belts la and 2a, and therefore of a blank of cardboard 8 transported, analysis means, not shown. on the drawing, have time to analyze it and decide which upper or lower path it should follow.
  • a second detector, or passage detector 10a is arranged downstream of the anomaly detector 10, preferably near the flap 6, and controls the tilting upward thereof when the analysis means have decided on the passage by the lower path of the blank 8.
  • the cardboard blank 8 is admitted between the strands 1a and 2a of the contacting portion of the first and second belts 1 and 2, and is driven by these towards the selection flap 6.
  • the flap 6, in a given time tl switches upwards and the blank 8 which is presented in front of the flap 6 is then routed by the latter between the strands 2b and 4a of the belts 2 and.
  • the flap 6 remains in the low position and the cardboard blank 8 is then routed between the strands 1b and 3a of the belts 1 and 3.
  • the strands 1a and 2a of the belts 1 and 2 are in contact but deviate from one another at a distance dJL from the front part of the flap 6. Furthermore the most upstream area of the belt 3 is in contact with the strand 1b at a distance d2 from the front part of the flap 6.
  • the length of the cardboard blanks 8 must therefore be greater than the distance dl + d2_ if it is desired that at least part of this is maintained at all times by two strands of belt, namely the strands 1a and 2a then the strands 1b and 3a.
  • the selection means can comprise a reserve of pressurized air 14 which supplies a rapid type solenoid valve 16 which is itself connected to a jack 18. This acts on one end of an arm 20 pivotally mounted about an axis 22 which ends in the flap 6.
  • the solenoid valve 16 is controlled by the sensor 10a via an interface 24.
  • the detector 10a when the blank 8 passes 8 controls the opening of the rapid solenoid valve 16 which allows the pressurized fluid contained in the reserve 14 to be admitted into the jack 18 whose piston moves down, so that the lever 20 pivots around its axis 22 which has the effect of moving the flap in position high.
  • other means of controlling the shutter 6 could also be provided.
  • FIG. 4 shows an embodiment of the invention in which the device also comprises two belt loops, namely an upper loop and a lower loop respectively formed by a belt 1 and a belt 2.
  • the strand lower of the belt 1 forms a curve of large radius (about 3 meters) between its two end rollers 5a whose concavity is oriented downwards.
  • the lower strand of the belt 1 is separated into two zones, namely an upstream zone la and a downstream zone lb.
  • the concavity is obtained by means of a part of rollers 9 which apply the strand 2a of the belt 2 against the area la of the belt 1 and give these two belts the desired curvature and by rollers 11.
  • the upper strand of the belt 2 comprises a first zone 2a which is curved, followed by a second zone 2c at the bifurcation zone, also curve with concavity oriented downwards under the action of rollers 13 and with a smaller radius of curvature, and a third zone 2b with concavity oriented upwards under the action of rollers 12.
  • the device comprises, as before, two intermediate belts 3 and 4 which have a shape such that they are in contact with one another.
  • the intermediate belt 3 has an elongated shape and is arranged under the area 1b so that its upper strand 3a is in contact with the area 1b.
  • the rollers 11 give the strand 3a and the area lb a curvature, with a concavity oriented downwards which, in addition to the advantage presently mentioned. also has the effect of improving the contact of the belts and therefore their mutual drive.
  • the lower loop formed by the belt 2 ends in a series of tension rollers 15 and a drive roller 17.
  • the belts 3 and 4 are arranged so that the lower strand 3b of the belt 3 is in contact with the upper strand 4a of the belt 4.
  • Such an arrangement makes it possible to drive all of the belts by means of a single drive belt, namely the belt 1 itself driven by the drive roller 17.
  • the upper face of the strand 2c of the belt 2 applies by rollers 13 the cardboard blank 8 against the lower face of the flap 6, when the latter is in the raised position and, the coefficient of friction of this lower face being much lower than that of the belt, the transfer of the blank 8 is thus ensured.
  • the lower face of the flap 6 thus ensures, in cooperation with the strand 2a of the belt 2, the holding of the blank 8 before it this is supported by strands 2a and 4a.
  • FIGS. 3a and 3b show a particularly advantageous embodiment of the invention in which the bifurcation zone of the upper and lower paths constitutes an angle of approximately 20 ° whose sides are curved, the two concavities being facing down.
  • the rear part 6a of the upper face of the flap 6 is parallel to the curvature of the belt strand 1b which is higher than it, when the flap 6 is in the high position, while its front part 6b is more curved down.
  • the lower face 6c of the flap 6 is parallel over its entire length to the belt strand 2c which is lower when the flap 6 is in the low position.
  • the selection device according to the invention can be used with machines separating a strip of cardboard into any number of series of cardboard blanks. Depending on the specific use, it is advantageous to be able to easily and quickly convert a machine comprising a given number of selection devices arranged in parallel into a machine having a different number of these selection devices.
  • the present invention is particularly suitable for such a rapid conversion, insofar as it promotes the constitution of a modular structure.
  • Each of the basic modules of this structure comprises a set of belts and selection means constituted in particular by a pivoting flap and means for controlling the latter, so as to be completely autonomous.
  • a module essentially consists of a plate 30 supporting axes on which the various rollers 5,7,15,17 are rotatably mounted around which the upper 1 and lower belts 2 as well as intermediate belts 3 and 4.
  • the plate 30 is crossed by a slot 33 which extends from the arrival side of the cardboard blanks 8 and which separates into two divergent slots at the level of the selection flap 6 so as to follow the path of the belts.
  • This slot 33 allows the use of cardboard blanks 8 which have a width greater than that of the belts 1,2,3,4.
  • the shutter 6 and its actuating means are fixed on the side of the plate 30 where the rollers are arranged. For reasons of clarity of the drawing, they are not shown on it.
  • the shutter 6 control means for reasons of saving space will preferably be disposed on the side of the plate 30 where the belts are installed.

Landscapes

  • Making Paper Articles (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Structure Of Belt Conveyors (AREA)

Abstract

A device for selecting cut paperboard blanks as they are fed between at least two series of drive belts (1, 2, 3, 4) defining an upper path and a lower path. Said device comprises a path selection means consisting of a flap (6) pivotably mounted about a downstream shaft (O) capable of being placed in two positions, i.e. a normal operating position in which the blanks (8) are fed to the upper path, and a selection position in which the blanks (8) are fed to the lower path. The device is characterised in that the upper path of the drive belts (1, 2, 3) driving the blanks (8) is curved, at least in the upstream and downstream portions adjacent to the pivotable flap (6), with a substantially uniform radius of curvature, and the upper rear surface (6a) of the flap (6) has a curvature adjacent to that of the belt extending thereabove, so that in the selection position, it defines therewith a substantially parallel path.

Description

DISPOSITIF DE SELECTION DE FLANS DE CARTON DECOUPES DEVICE FOR SELECTING CUT CARDBOARD BLANKS
La présente invention concerne un dispositif destiné à effectuer une sélection de flans de carton découpés sur une machine de distribution, notamment afin d'éliminer d'un flot de produits ceux qui sont considérés comme défectueux. La présente invention concerne notamment un dispositif de sélection permettant d'améliorer de façon très notable la cadence de sélection.The present invention relates to a device intended for carrying out a selection of blanks of cardboard cut out on a dispensing machine, in particular in order to eliminate from a stream of products those which are considered to be defective. The present invention relates in particular to a selection device making it possible to significantly improve the selection rate.
On sait qu'après une opération de découpage d'une nappe de carton au cours de laquelle on forme un flot de flans de carton et notamment des étuis, certains de ceux- ci peuvent se révéler défectueux. La plupart du temps l'élimination de ces flans défectueux est réalisée au niveau de la réception des étuis, ce qui occasionne à la fois une perte de temps et une complication du processus de production.It is known that after a cardboard sheet cutting operation during which a stream of cardboard blanks and in particular cases is formed, some of these can prove to be defective. Most of the time the elimination of these defective blanks is carried out at the reception of the cases, which causes both a waste of time and a complication of the production process.
Une solution consiste à effectuer cette sélection au cours du déplacement des flans, avant qu'ils ne soient réceptionnés, de façon à éliminer l'opération supplémentaire de tri. On sait qu'une difficulté d'un tel mode opératoire provient de la grande vitesse de défilement de ces flans qui implique des moyens de sélection extrêmement rapides et précis.One solution is to make this selection during the movement of the blanks, before they are received, so as to eliminate the additional sorting operation. We know that a difficulty in such an operating mode comes from the high speed of travel of these blanks which implies extremely fast and precise selection means.
Dans des techniques annexes on a ainsi utilisé, des trieuses en mesure de trier des produits d'environ 30 cm de longueur en déplacement avec une vitesse de l'ordreIn additional techniques, sorters able to sort products of around 30 cm in length have thus been used on the move with a speed of the order
UILLE DE REMPLACEMENT RÈGLE 26 de 180 m/mm, ce qui représente une sélection de 600 produits par minute. Dans de telles conditions on estime que la fiabilité du tri est de l'ordre de 99,7%.SUBSTITUTE RULE RULE 26 180 m / mm, which represents a selection of 600 products per minute. Under such conditions it is estimated that the reliability of the sorting is of the order of 99.7%.
La présente invention a pour but de proposer un dispositif de sélection en mesure d'améliorer à la fois le nombre de sélections possibles par minute ainsi que la fiabilité de celui-ci.The object of the present invention is to propose a selection device able to improve both the number of possible selections per minute as well as the reliability thereof.
La présente invention a ainsi pour objet un dispositif de sélection de flans de carton découpés au cours de leur déplacement entre au moins deux séries de courroies d'entraînement, définissant deux trajets pour les flans, a savoir un trajet supérieur et un trajet inférieur formant un angle de bifurcation, ce dispositif comportant des moyens de sélection de trajet, constitués d'un volet dispose dans l'angle de bifurcation des deux trajets, et qui est monte pivotant autour d'un axe aval, apte a occuper deux positions, a savoir une position inférieure, ou position de fonctionnement normal, qui aiguille les flans vers le trajet supérieur et une position supérieure, ou position de sélection, qui aiguille les flans vers le trajet inférieur, caractérisé en ce que : le trajet supérieur des courroies d'entraînement des flans, au moins dans les parties amont et aval proches du volet pivotant, forme une courbe dont le rayon de courbure est sensiblement uniforme, la face postérieure et supérieure du volet possède une courbure voisine de celle de la courroie qui lui est supérieure, de façon, qu'en position de sélection, elle définisse avec celle-ci un chemin sensiblement parallèle.The present invention thus relates to a device for selecting cardboard blanks cut during their movement between at least two series of drive belts, defining two paths for the blanks, namely an upper path and a lower path forming a bifurcation angle, this device comprising path selection means, consisting of a flap arranged in the bifurcation angle of the two paths, and which is mounted to pivot about a downstream axis, capable of occupying two positions, namely a lower position, or normal operating position, which directs the blanks towards the upper path and an upper position, or selection position, which directs the blanks towards the lower path, characterized in that: the upper path of the drive belts blanks, at least in the upstream and downstream parts close to the pivoting flap, form a curve whose radius of curvature is substantially uniform, the post face and higher than the flap has a curvature close to that of the belt it is greater, so that in the selection position, it defines therewith a substantially parallel path.
Dans un mode de mise en oeuvre de l'invention la concavité de la courbe est orientée du côté du volet et la partie antérieure de la face supérieure du volet s'incurve vers le bas.In one embodiment of the invention, the concavity of the curve is oriented on the side of the flap and the front part of the upper face of the flap curves downward.
Dans un autre mode de mise en oeuvre de l'invention le trajet inférieur des courroies d'entraînement des flans, au moins dans les parties amont et aval proches du volet pivotant, forme une courbe dont le rayon de courbure est sensiblement uniforme, la concavité de la courbe étant préférentiellement orientée du côté opposé au volet. Par ailleurs la face inférieure du volet peut posséder une courbure voisine de celle de la courroie qui lui est inférieure, de façon, qu'en position de fonctionnement normal, elle définisse avec celle-ci un chemin sensiblement parallèle.In another embodiment of the invention, the lower path of the blank drive belts, at least in the upstream and downstream parts close to the pivoting flap, forms a curve whose radius of curvature is substantially uniform, the concavity of the curve preferably being oriented on the side opposite the flap. Furthermore, the lower face of the flap may have a curvature close to that of the belt which is lower therein, so that, in the normal operating position, it defines therewith a substantially parallel path.
Le dispositif suivant l'invention comporte préférentiellement des moyens aptes à maintenir le flan de carton, au moins au moment de son passage au niveau du volet, sur au moins une partie de sa surface, entre deux éléments de maintien dont l'un au moins est constitué par un brin de courroie. L'autre élément de maintien peut être constitué par un autre brin de courroie ou par un rouleau.The device according to the invention preferably comprises means capable of holding the cardboard blank, at least when it passes through the flap, on at least part of its surface, between two holding elements, one of which at least consists of a belt strand. The other holding element can be constituted by another strand of belt or by a roller.
Dans un mode de mise en oeuvre de l'invention le dispositif comprend au moins quatre courroies qui définissent les deux trajets supérieur et inférieur. Dans ce dispositif, en amont du volet, une première portion du brin inférieur d'une première courroie ou courroie supérieure, et une première portion du brin supérieur d'une seconde courroie, ou courroie inférieure, sont en contact, et en aval du volet une seconde portion du brin inférieur de la première courroie est en contact avec le brin supérieur d'une troisième courroie et une seconde portion du brin supérieur de la seconde courroie est en contact avec le brin inférieur d'une quatrième courroie. Un brin supérieur de la quatrième courroie peut également être en contact avec le brin inférieur de la troisième courroie.In one embodiment of the invention, the device comprises at least four belts which define the two upper and lower paths. In this device, upstream of the flap, a first portion of the lower strand of a first belt or upper belt, and a first portion of the upper strand of a second belt, or lower belt, are in contact, and downstream of the flap a second portion of the lower strand of the first belt is in contact with the upper strand of a third belt and a second portion of the upper strand of the second belt is in contact with the lower strand of a fourth belt. An upper strand of the fourth belt may also be in contact with the lower strand of the third belt.
Le dispositif suivant l'invention se prête particulièrement bien à une réalisation de type modulaire. Chaque module comprendra ainsi son propre système mécanique d'entraînement, constitué notamment de quatre courroies, et son propre système de sélection, constitué d'un volet monté pivotant. Ce volet pourra être monté sur un levier mobile autour d'un axe de rotation aval sous l'action d'un vérin commandé par une vanne pneumatique rapide alimentée par un réservoir d'air sous pression. Il est ainsi particulièrement facile de modifier le positionnement relatif de plusieurs modules en fonction des différentes applications spécifiques de 1'appareil.The device according to the invention lends itself particularly well to an embodiment of the modular type. Each module will thus include its own mechanical drive system, consisting in particular of four belts, and its own selection system, consisting of a pivotally mounted flap. This flap can be mounted on a lever movable around a downstream axis of rotation under the action of a jack controlled by a rapid pneumatic valve supplied by a pressurized air tank. It is thus particularly easy to modify the relative positioning of several modules according to the different specific applications of the device.
Préférentiellement tous les éléments mécaniques du dispositif peuvent être disposés sur une platine unique de façon à constituer un module réglable et positionnable de façon autonome.Preferably all the mechanical elements of the device can be arranged on a plate unique so as to constitute an adjustable and positionable module independently.
On décrira ci-après, à titre d'exemple non limitatif, une forme d'exécution de la présente invention, en référence au dessin annexé sur lequel :An embodiment of the present invention will be described below, by way of non-limiting example, with reference to the appended drawing in which:
La figure 1 est une vue schématique en plan montrant le principe de fonctionnement d'un dispositif sélecteur suivant l'invention.Figure 1 is a schematic plan view showing the operating principle of a selector device according to the invention.
La figure 2 est un schéma illustrant le fonctionnement des moyens de sélection mis en oeuvre dans le dispositif suivant l'invention.FIG. 2 is a diagram illustrating the operation of the selection means used in the device according to the invention.
Les figures 3a et 3b sont des coupes verticales et longitudinales partielles agrandies montrant la zone de bifurcation des deux trajets et le volet de sélection respectivement en position supérieure et inférieure.Figures 3a and 3b are enlarged partial vertical and longitudinal sections showing the bifurcation zone of the two paths and the selection flap in the upper and lower positions respectively.
La figure 4 est une vue schématique en plan d'une variante du mode de mise en oeuvre représenté sur la figure 1.FIG. 4 is a schematic plan view of a variant of the embodiment shown in FIG. 1.
La figure 5 est une vue en perspective de la variante représentée sur la figure 4, les moyens de sélection étant ôtés.Figure 5 is a perspective view of the variant shown in Figure 4, the selection means being removed.
Sur la figure 1, le dispositif suivant l'invention est essentiellement constitué de quatre courroies disposées symétriquement deux à deux par rapport à un axe longitudinal xx'. La première et la seconde courroie respectivement supérieure 1 et inférieure 2 sont enroulées sur des rouleaux 5,5a et 7,7a de façon à former une boucle supérieure et une boucle inférieure qui sont symétriques par rapport à l'axe xx' . Les deux boucles, de l'amont vers l'aval, comportent une première zone dans laquelle deux brins de courroie la et 2a, disposés respectivement entre deux rouleaux 5a,5b et 7a,7b sont rectilignes et en contact l'un avec l'autre suivant l'axe xx' . Une seconde zone est définie par trois rouleaux respectifs 5b, 7b qui confèrent aux deux brins de courroie suivants lb et 2b d'une part un écartement et d'autre part une courbure régulière dont la concavité est respectivement dirigée vers le haut et vers le bas.In FIG. 1, the device according to the invention essentially consists of four belts arranged symmetrically two by two with respect to a longitudinal axis xx '. The first and second upper 1 and lower 2 belts respectively are wound on rolls 5.5a and 7.7a so as to form an upper loop and a loop which are symmetrical with respect to the axis xx '. The two loops, from upstream to downstream, comprise a first zone in which two strands of belt la and 2a, disposed respectively between two rollers 5a, 5b and 7a, 7b are rectilinear and in contact with one another along axis xx '. A second zone is defined by three respective rollers 5b, 7b which give the two following belt strands 1b and 2b on the one hand a spacing and on the other hand a regular curvature whose concavity is directed upwards and downwards respectively .
Le dispositif comporte également une troisième courroie 3 dont le brin supérieur 3a est en contact avec le brin lb de la première courroie 1, de façon à épouser la courbure de celle-ci, et une quatrième courroie 4 dont le brin inférieur 4a est en contact avec le brin 2b de la seconde courroie 2 , de façon également à épouser sa courbure. Ces courroies sont entraînées en rotation par des moteurs, non représentés sur le dessin. Elles sont asservies entre elles, par exemple, au moyen de crans, de façon que leurs vitesses de déplacement soient aussi voisines que possible de façon à éviter tout glissement. Le sens de rotation des courroies est tel que représenté par les flèches sur la figure 1, à savoir une rotation dans le sens des aiguilles d'une montre pour les courroies 1 et 4 et une rotation en sens inverse pour les courroies 2 et 3.The device also comprises a third belt 3 whose upper strand 3a is in contact with the strand 1b of the first belt 1, so as to match the curvature thereof, and a fourth belt 4 whose lower strand 4a is in contact with the strand 2b of the second belt 2, so as to match its curvature. These belts are driven in rotation by motors, not shown in the drawing. They are slaved to each other, for example, by means of notches, so that their displacement speeds are as close as possible so as to avoid any sliding. The direction of rotation of the belts is as shown by the arrows in FIG. 1, namely a rotation in the clockwise direction for the belts 1 and 4 and a rotation in the opposite direction for the belts 2 and 3.
Le dispositif comprend également des moyens de sélection, constitues d'un volet 6 monté pivotant autour d'un axe aval O parallèle aux axes de rotation des rouleaux 5 et 7. Ce volet 6 est apte à occuper deux positions, à savoir une position basse, ou position de fonctionnement normal (qui correspond par exemple au passage de flans corrects) , et une position haute, ou position de sélection (qui correspond par exemple à une position de sélection de flans défectueux) .The device also includes selection means, consisting of a flap 6 mounted pivoting around a downstream axis O parallel to the axes of rotation of the rollers 5 and 7. This flap 6 is capable of occupying two positions, namely a low position, or normal operating position (which corresponds for example to the passage of correct blanks), and a high position, or selection position (which corresponds for example to a defective blank selection position).
La face supérieure du volet 6 possède une courbure dont la concavité est orientée vers le haut et son rayon de courbure est tel que, en position basse il définisse avec le brin de courroie lb qui lui est supérieur un chemin parallèle. De même la face inférieure du volet 6 possède une courbure dont la concavité est orientée vers le bas et son rayon de courbure est tel que, en position haute il définisse avec le brin de courroie 2b qui lui est inférieur un chemin parallèle.The upper face of the flap 6 has a curvature whose concavity is oriented upwards and its radius of curvature is such that, in the low position, it defines with the belt strand lb which is above it a parallel path. Similarly, the underside of the flap 6 has a curvature whose concavity is oriented downwards and its radius of curvature is such that, in the high position, it defines with the belt strand 2b which is below it a parallel path.
La demanderesse a constaté qu'en conférant au trajet supérieur suivi par le flan de carton, ou trajet de fonctionnement normal, une courbure régulière au voisinage amont et aval du volet de sélection 6 et en donnant à la partie postérieure de la face supérieure de celui-ci une courbe voisine de celle de la courroie qui lui était supérieure, il était possible d'augmenter dans une forte proportion le nombre de flans de carton sélectionnables par le dispositif. En effet avec les dispositifs de l'état antérieur de la technique il était possible de contrôler le passage d'environs 600 flans par minute avec un nombre d'incidents de fonctionnement de la machine (bourrage) d'environ un en 24 heures de fonctionnement. Le dispositif suivant l'invention a permis de contrôler le passage de 1000 flans de carton par minute avec seulement un seul incident en 800 heures de fonctionnement.The Applicant has found that by giving the upper path followed by the cardboard blank, or normal operating path, a regular curvature in the upstream and downstream vicinity of the selection flap 6 and by giving the posterior part of the upper face of that -when a curve close to that of the belt which was higher, it was possible to greatly increase the number of cardboard blanks selectable by the device. Indeed with the devices of the prior art it was possible to control the passage of about 600 blanks per minute with a number of operating incidents of the machine (stuffing) of about one in 24 hours of operation. The device according to the invention made it possible to control the passage of 1000 blanks of cardboard per minute with only a single incident in 800 hours of operation.
Il en résulte non seulement une augmentation possible du débit de la machine mais également une augmentation de la fiabilité de celle-ci.The result is not only a possible increase in the flow rate of the machine but also an increase in the reliability thereof.
Le volet 6 est normalement en position basse, mais il est susceptible de passer en position haute à chaque fois qu'un flan à sélectionner est détecté. Cette détection est effectuée par un détecteur d'anomalie 10 qui peut être de tout type approprié au paramètre que l'on souhaite contrôler. Le détecteur 10 est disposé à une distance d du volet 6 qui est suffisante pour que, compte tenu de la vitesse de déplacement des courroies la et 2a, et donc d'un flan de carton 8 transporté, des moyens d'analyse, non représentés sur le dessin, aient le temps d'analyser celui-ci et de décider du chemin supérieur ou inférieur qu'il doit suivre. Un second détecteur, ou détecteur de passage 10a, est disposé en aval du détecteur d'anomalie 10, de préférence à proximité du volet 6, et commande le basculement vers le haut de celui-ci lorsque les moyens d'analyse ont décidé du passage par le chemin inférieur du flan 8. Dans ces conditions le fonctionnement du dispositif de sélection s'effectue comme décrit ci-après. Le flan de carton 8 est admis entre les brins la et 2a de la portion en contact des première et seconde courroies 1 et 2, et est entraîné par celles-ci en direction du volet de sélection 6. Lorsqu'une sélection est ordonnée par le détecteur 10, le volet 6, dans un temps tl donné, bascule vers le haut et le flan 8 qui se présente devant le volet 6 est alors aiguillé par celui- ci entre les brins 2b et 4a des courroies 2 et . Par contre lorsqu'aucune anomalie n'est détectée, le volet 6 reste en position basse et le flan de carton 8 est alors aiguillé entre les brins lb et 3a des courroies 1 et 3.The shutter 6 is normally in the low position, but it is likely to move to the high position each time a blank to be selected is detected. This detection is carried out by an anomaly detector 10 which can be of any type appropriate to the parameter that one wishes to control. The detector 10 is disposed at a distance d from the flap 6 which is sufficient so that, taking into account the speed of movement of the belts la and 2a, and therefore of a blank of cardboard 8 transported, analysis means, not shown. on the drawing, have time to analyze it and decide which upper or lower path it should follow. A second detector, or passage detector 10a, is arranged downstream of the anomaly detector 10, preferably near the flap 6, and controls the tilting upward thereof when the analysis means have decided on the passage by the lower path of the blank 8. Under these conditions, the operation of the selection device is carried out as described below. The cardboard blank 8 is admitted between the strands 1a and 2a of the contacting portion of the first and second belts 1 and 2, and is driven by these towards the selection flap 6. When a selection is ordered by the detector 10, the flap 6, in a given time tl, switches upwards and the blank 8 which is presented in front of the flap 6 is then routed by the latter between the strands 2b and 4a of the belts 2 and. On the other hand, when no anomaly is detected, the flap 6 remains in the low position and the cardboard blank 8 is then routed between the strands 1b and 3a of the belts 1 and 3.
Suivant l'invention les brins la et 2a des courroies 1 et 2 sont en contact mais s'écartent l'un de l'autre à une distance dJL de la partie antérieure du volet 6. Par ailleurs la zone la plus en amont de la courroie 3 est en contact avec le brin lb à une distance d2 de la partie antérieure du volet 6. La longueur des flans de carton 8 doit donc être supérieure à la distance dl + d2_ si l'on souhaite qu'au moins une partie de celui- ci soit maintenue à tout moment par deux brins de courroie à savoir les brins la et 2a puis les brins lb et 3a.According to the invention the strands 1a and 2a of the belts 1 and 2 are in contact but deviate from one another at a distance dJL from the front part of the flap 6. Furthermore the most upstream area of the belt 3 is in contact with the strand 1b at a distance d2 from the front part of the flap 6. The length of the cardboard blanks 8 must therefore be greater than the distance dl + d2_ if it is desired that at least part of this is maintained at all times by two strands of belt, namely the strands 1a and 2a then the strands 1b and 3a.
Les moyens de sélection, comme représenté sur la figure 2, peuvent comprendre une réserve d'air sous pression 14 qui alimente une électrovanne de type rapide 16 qui est elle-même reliée à un vérin 18. Celui-ci agit sur une extrémité d'un bras 20 monté à pivotement autour d'un axe 22 qui se termine par le volet 6. L'électrovanne 16 est commandée par le capteur 10a par l'intermédiaire d'une interface 24. Lorsqu'un flan défectueux est détecté par le détecteur d'anomalie 10 le détecteur 10a au passage du flan 8 commande l'ouverture de l'électrovanne rapide 16 qui permet au fluide sous pression contenu dans la réserve 14 d'être admis dans le vérin 18 dont le piston se déplace vers le bas, si bien que le levier 20 pivote autours de son axe 22 ce qui a pour effet de déplacer le volet en position haute. Bien entendu on pourrait également prévoir d'autres moyens de commande du volet 6.The selection means, as shown in FIG. 2, can comprise a reserve of pressurized air 14 which supplies a rapid type solenoid valve 16 which is itself connected to a jack 18. This acts on one end of an arm 20 pivotally mounted about an axis 22 which ends in the flap 6. The solenoid valve 16 is controlled by the sensor 10a via an interface 24. When a faulty blank is detected by the anomaly detector 10 the detector 10a when the blank 8 passes 8 controls the opening of the rapid solenoid valve 16 which allows the pressurized fluid contained in the reserve 14 to be admitted into the jack 18 whose piston moves down, so that the lever 20 pivots around its axis 22 which has the effect of moving the flap in position high. Of course, other means of controlling the shutter 6 could also be provided.
Il n'est pas nécessaire d'assurer un entraînement positif de chacune des courroies 1 à 4, et on pourrait également suivant l'invention assurer cet entraînement à l'aide d'une seule courroie motrice, l'entraînement des autres courroies s'effectuant alors par friction, soit directement sur la courroie motrice soit indirectement de proche en proche. Ainsi sur le dispositif représenté sur la figure 1, on peut assurer un entraînement positif de la seule courroie 2. Dès lors cette dernière assurera l'entraînement par friction de la courroie 1 et de la courroie 4, la courroie 1 assurant elle-même l'entraînement de la courroie 3.It is not necessary to ensure a positive drive of each of the belts 1 to 4, and one could also according to the invention provide this drive using a single drive belt, the drive of the other belts then performing by friction, either directly on the drive belt or indirectly step by step. Thus on the device represented in FIG. 1, it is possible to ensure a positive drive of the single belt 2. From then on the latter will ensure the friction drive of the belt 1 and of the belt 4, the belt 1 ensuring itself l belt drive 3.
On a représenté sur la figure 4 un mode de mise en oeuvre de l'invention dans lequel le dispositif comprend également deux boucles de courroies à savoir une boucle supérieure et une boucle inférieure respectivement formées par une courroie 1 et une courroie 2. Le brin inférieur de la courroie 1 forme une courbe de grand rayon (environ 3 mètres) entre ses deux rouleaux extrêmes 5a dont la concavité est orientée vers le bas. Le brin inférieur de la courroie 1 est séparé en deux zones, à savoir une zone amont la et une zone aval lb. La concavité est obtenue au moyen d'une part de rouleaux 9 qui appliquent le brin 2a de la courroie 2 contre la zone la de la courroie 1 et donnent à ces deux courroies la courbure souhaitée et par des rouleaux 11. Comme précédemment la courroie 2 se sépare de la courroie 1 dans une zone de bifurcation dans laquelle est disposé un volet 6, monté pivotant autour d'un axe aval O. Le brin supérieur de la courroie 2 comprend une première zone 2a qui est courbe, suivie d'une seconde zone 2c au niveau de la zone de bifurcation, également courbe à concavité orientée vers le bas sous l'action de rouleaux 13 et de plus faible rayon de courbure, et d'une troisième zone 2b à concavité orientée vers le haut sous l'action de rouleaux 12. Le dispositif comprend comme précédemment deux courroies intermédiaires 3 et 4 qui ont une forme telle qu'elles sont en contact l'une avec l'autre. La courroie intermédiaire 3 a une forme allongée et est disposée sous la zone lb de façon que son brin supérieur 3a soit en contact avec la zone lb. Les rouleaux 11 donnent au brin 3a et à la zone lb une courbure, à concavité orientée vers le bas qui, outre l'avantage présentement mentionné. a également pour effet d'améliorer le contact des courroies et donc leur entraînement mutuel.FIG. 4 shows an embodiment of the invention in which the device also comprises two belt loops, namely an upper loop and a lower loop respectively formed by a belt 1 and a belt 2. The strand lower of the belt 1 forms a curve of large radius (about 3 meters) between its two end rollers 5a whose concavity is oriented downwards. The lower strand of the belt 1 is separated into two zones, namely an upstream zone la and a downstream zone lb. The concavity is obtained by means of a part of rollers 9 which apply the strand 2a of the belt 2 against the area la of the belt 1 and give these two belts the desired curvature and by rollers 11. As before the belt 2 separates from the belt 1 in a bifurcation zone in which a flap 6 is disposed, pivotally mounted around a downstream axis O. The upper strand of the belt 2 comprises a first zone 2a which is curved, followed by a second zone 2c at the bifurcation zone, also curve with concavity oriented downwards under the action of rollers 13 and with a smaller radius of curvature, and a third zone 2b with concavity oriented upwards under the action of rollers 12. The device comprises, as before, two intermediate belts 3 and 4 which have a shape such that they are in contact with one another. The intermediate belt 3 has an elongated shape and is arranged under the area 1b so that its upper strand 3a is in contact with the area 1b. The rollers 11 give the strand 3a and the area lb a curvature, with a concavity oriented downwards which, in addition to the advantage presently mentioned. also has the effect of improving the contact of the belts and therefore their mutual drive.
La boucle inférieure formée par la courroie 2 se termine par une série de rouleaux tendeurs 15 et un rouleau moteur 17. Les courroies 3 et 4 sont disposées de telle façon que le brin inférieur 3b de la courroie 3 soit en contact avec le brin supérieur 4a de la courroie 4. Une telle disposition permet d'entraîner l'ensemble des courroies au moyen d'une seule courroie motrice, à savoir la courroie 1 elle-même entraînée par le rouleau moteur 17.The lower loop formed by the belt 2 ends in a series of tension rollers 15 and a drive roller 17. The belts 3 and 4 are arranged so that the lower strand 3b of the belt 3 is in contact with the upper strand 4a of the belt 4. Such an arrangement makes it possible to drive all of the belts by means of a single drive belt, namely the belt 1 itself driven by the drive roller 17.
Afin de favoriser l'entraînement des flans de carton 8 après que ceux-ci aient passé le volet 6 on a rapproché au maximum de la partie aval de celui-ci le brin supérieur 3a de la courroie 3. Cependant, pour des raisons d'encombrement, on ne peut faire de même, avec le brin inférieur 4a de la courroie 4. C'est pourquoi, afin d'assurer un entraînement efficace du flan de carton 8 par le chemin inférieur du dispositif, d'une part on donne à la face inférieure du volet 6 une forme profilée conforme à la courbure imposée à la courroie 2 par les rouleaux 9 et, d'autre part, on lui donne une grande qualité de poli de façon à minimiser les coefficients de frottement du flan de carton 8 sur cette surface. Dans ces conditions, la face supérieure du brin 2c de la courroie 2 applique par des rouleaux 13 le flan de carton 8 contre la face inférieure du volet 6, lorsque celui-ci est en position relevée et, le coefficient de frottement de cette face inférieur étant de beaucoup inférieur à celui de la courroie, on assure ainsi le transfert du flan 8. La face inférieure du volet 6 assure ainsi en coopération avec le brin 2a de la courroie 2 le maintien du flan 8 avant que celui-ci soit pris en charge par les brins 2a et 4a.In order to promote the driving of the cardboard blanks 8 after they have passed the flap 6, the upper strand 3a of the belt 3 is brought as close as possible to the downstream part thereof. However, for reasons of space, we can not do the same, with the lower strand 4a of the belt 4. This is why, in order to ensure an effective drive of the cardboard blank 8 by the lower path of the device, on the one hand we give to the underside of the flap 6 a profiled shape conforming to the curvature imposed on the belt 2 by the rollers 9 and, on the other hand, it is given a high quality of polish so as to minimize the coefficients of friction of the cardboard blank 8 on this surface. Under these conditions, the upper face of the strand 2c of the belt 2 applies by rollers 13 the cardboard blank 8 against the lower face of the flap 6, when the latter is in the raised position and, the coefficient of friction of this lower face being much lower than that of the belt, the transfer of the blank 8 is thus ensured. The lower face of the flap 6 thus ensures, in cooperation with the strand 2a of the belt 2, the holding of the blank 8 before it this is supported by strands 2a and 4a.
On a représenté sur les figures 3a et 3b un mode de mise en oeuvre particulièrement intéressant de l'invention dans lequel la zone de bifurcation des trajets supérieur et inférieur constitue un angle d'environ 20° dont les côtés sont incurvés, les deux concavités étant orientées vers le bas. Dans ce mode de mise en oeuvre la partie postérieure 6a de la face supérieure du volet 6 est parallèle à la courbure du brin de courroie lb qui lui est supérieure, lorsque le volet 6 est en position haute, alors que sa partie antérieure 6b est davantage incurvée vers le bas. Par ailleurs la face inférieure 6c du volet 6 est parallèle sur toute sa longueur au brin de courroie 2c qui lui est inférieur lorsque le volet 6 est en position basse.FIGS. 3a and 3b show a particularly advantageous embodiment of the invention in which the bifurcation zone of the upper and lower paths constitutes an angle of approximately 20 ° whose sides are curved, the two concavities being facing down. In this embodiment, the rear part 6a of the upper face of the flap 6 is parallel to the curvature of the belt strand 1b which is higher than it, when the flap 6 is in the high position, while its front part 6b is more curved down. Furthermore the lower face 6c of the flap 6 is parallel over its entire length to the belt strand 2c which is lower when the flap 6 is in the low position.
Compte tenu des cadences de défilement des flans de carton qui sont mis en oeuvre par de tels dispositifs il peut arriver, comme représenté sur la figure 3b, qu'un flan de carton 8 soit engagé au dessus du volet 6 lorsque celui-ci reçoit l'ordre de passer en position haute. Le profil courbe du volet 6 lui permet de repousser le flan 8 en lui restant tangentiel et en ayant avec celui-ci une surface de contact réduite, ce qui minimise les frottements et favorise la déviation du flan 8.Given the rates of movement of the cardboard blanks which are used by such devices, it may happen, as shown in FIG. 3b, that a cardboard blank 8 is engaged above the flap 6 when the latter receives the 'order to move up. The curved profile of the flap 6 allows it to repel the blank 8 while remaining tangential thereto and having with it a reduced contact surface, which minimizes friction and promotes deflection of the blank 8.
On notera également que le maintien du flan de carton pendant son transfert peut également être assuré par un rouleau.It will also be noted that the maintenance of the cardboard blank during its transfer can also be ensured by a roller.
Le dispositif de sélection suivant l'invention peut être utilisé avec des machines séparant une bande de carton en un nombre quelconque de séries de flans de carton. En fonction de l'utilisation spécifique, il est intéressant de pouvoir convertir facilement et rapidement une machine comportant un nombre donné de dispositifs de sélection disposés en parallèle en une machine possédant un nombre différent de ces dispositifs de sélection.The selection device according to the invention can be used with machines separating a strip of cardboard into any number of series of cardboard blanks. Depending on the specific use, it is advantageous to be able to easily and quickly convert a machine comprising a given number of selection devices arranged in parallel into a machine having a different number of these selection devices.
La présente invention se prête particulièrement à une telle conversion rapide, dans la mesure où elle favorise la constitution d'une structure modulaire.The present invention is particularly suitable for such a rapid conversion, insofar as it promotes the constitution of a modular structure.
Chacun des modules de base de cette structure comprend un ensemble de courroies et des moyens de sélection constitués notamment d'un volet pivotant et des moyens de commande de celui-ci, de façon à être complètement autonome. De cette façon il est possible de disposer facilement, en fonction de besoins spécifiques, du nombre de modules nécessaires à une application déterminée . Comme représenté sur la figure 5, un tel module est essentiellement constitué d'une platine 30 supportant des axes sur lesquels sont montés à rotation les divers rouleaux 5,7,15,17 autour desquels sont enroulées les courroies supérieure 1 et inférieure 2 ainsi que les courroies intermédiaires 3 et 4. La platine 30 est traversée par une fente 33 qui s'étend à partir du côté d'arrivée des flans de carton 8 et qui se sépare en deux fentes divergentes au niveau du volet de sélection 6 de façon à suivre le trajet des courroies. Cette fente 33 permet d'utiliser des flans de carton 8 qui possèdent une largeur supérieure à celle des courroies 1,2,3,4. Le volet 6 ainsi que ses moyens d'actionnement, sont fixés sur le côté de la platine 30 où sont disposés les rouleaux. Pour des raisons de clarté du dessin ils ne sont pas représentés sur celui-ci. De même, les moyens de commande du volet 6, pour des raisons de gain de place seront de préférence disposés du côté de la platine 30 où sont installées les courroies. Each of the basic modules of this structure comprises a set of belts and selection means constituted in particular by a pivoting flap and means for controlling the latter, so as to be completely autonomous. In this way it is possible to easily have, depending on specific needs, the number of modules necessary for a specific application. As shown in FIG. 5, such a module essentially consists of a plate 30 supporting axes on which the various rollers 5,7,15,17 are rotatably mounted around which the upper 1 and lower belts 2 as well as intermediate belts 3 and 4. The plate 30 is crossed by a slot 33 which extends from the arrival side of the cardboard blanks 8 and which separates into two divergent slots at the level of the selection flap 6 so as to follow the path of the belts. This slot 33 allows the use of cardboard blanks 8 which have a width greater than that of the belts 1,2,3,4. The shutter 6 and its actuating means are fixed on the side of the plate 30 where the rollers are arranged. For reasons of clarity of the drawing, they are not shown on it. Similarly, the shutter 6 control means, for reasons of saving space will preferably be disposed on the side of the plate 30 where the belts are installed.

Claims

R E V E N D I C A T I O N SR E V E N D I C A T I O N S
1.- Dispositif de sélection de flans de carton découpés au cours de leur déplacement entre au moins deux séries de courroies d'entraînement (1,2,3,4), définissant deux trajets pour les flans (8), à savoir un trajet supérieur et un trajet inférieur formant un angle de bifurcation (α) , ce dispositif comportant des moyens de sélection de trajet constitués d'un volet (6) disposé dans l'angle de bifurcation des deux trajets et qui est monté pivotant autour d'un axe aval (O) apte à occuper deux positions, à savoir une position inférieure, ou position de fonctionnement normal, qui aiguille les flans1.- Device for selecting cardboard blanks cut during their movement between at least two series of drive belts (1,2,3,4), defining two paths for the blanks (8), namely a path upper and a lower path forming a bifurcation angle (α), this device comprising path selection means consisting of a flap (6) disposed in the bifurcation angle of the two paths and which is pivotally mounted around a downstream axis (O) able to occupy two positions, namely a lower position, or normal operating position, which switches the blanks
(8) vers le trajet supérieur et une position supérieure, ou position de sélection, qui aiguille les flans (8) vers le trajet inférieur, caractérisé en ce que : le trajet supérieur des courroies d'entraînement (1,2,3) des flans (8), au moins dans les parties amont et aval proches du volet pivotant (6), forme une courbe dont le rayon de courbure est sensiblement uniforme,(8) to the upper path and an upper position, or selection position, which directs the blanks (8) to the lower path, characterized in that: the upper path of the drive belts (1,2,3) of the blanks (8), at least in the upstream and downstream parts close to the pivoting flap (6), forms a curve whose radius of curvature is substantially uniform,
- la face postérieure et supérieure (6a) du volet (6) possède une courbure voisine de celle de la courroie qui lui est supérieure, de façon, qu'en position de sélection, elle définisse avec celle-ci un chemin sensiblement parallèle. 2.- Dispositif suivant la revendication 1 caractérisé en ce que la concavité de ladite courbe est orientée du côté du volet (6) .- The rear and upper face (6a) of the flap (6) has a curvature close to that of the belt which is higher, so that in the selection position, it defines therewith a substantially parallel path. 2.- Device according to claim 1 characterized in that the concavity of said curve is oriented on the side of the flap (6).
3.- Dispositif suivant la revendication 1 caractérisé en ce que la partie antérieure (6b) de ladite face s'incurve vers le bas.3.- Device according to claim 1 characterized in that the front part (6b) of said face curves downward.
4.- Dispositif suivant l'une des revendications précédentes caractérisé en ce que le trajet inférieur des courroies d'entraînement (1,2,4) des flans (8) , au moins dans les parties amont et aval proches du volet pivotant (6), forme une courbe dont le rayon de courbure est sensiblement uniforme,4.- Device according to one of the preceding claims characterized in that the lower path of the drive belts (1,2,4) of the blanks (8), at least in the upstream and downstream parts close to the pivoting flap (6 ), forms a curve whose radius of curvature is substantially uniform,
5.- Dispositif suivant la revendication 4 caractérisé en ce que la concavité de ladite courbe est orientée du côté opposé au volet (6) .5.- Device according to claim 4 characterized in that the concavity of said curve is oriented on the side opposite the flap (6).
6.- Dispositif suivant l'une des revendications 4 ou 5 caractérisé en ce que la face inférieure du volet (6) possède une courbure voisine de celle de la courroie (2) qui lui est inférieure, de façon, qu'en position de fonctionnement normal, elle définisse avec celle-ci un chemin sensiblement parallèle.6.- Device according to one of claims 4 or 5 characterized in that the underside of the flap (6) has a curvature close to that of the belt (2) which is lower therein, so that in the position of normal operation, it defines with it a substantially parallel path.
1 . - Dispositif suivant l'une des revendications précédentes caractérisé en ce qu'il comporte des moyens aptes à maintenir le flan de carton (8), au moins au moment de son passage au niveau du volet (6), sur au moins une partie de sa surface, entre deux éléments de maintien dont l'un au moins est constitué par un brin de courroie (1,2) . 8.- Dispositif suivant la revendication 7 caractérisé en ce que l'autre élément de maintien est constitué par un autre brin de courroie.1. - Device according to one of the preceding claims, characterized in that it comprises means capable of maintaining the cardboard blank (8), at least when it passes through the flap (6), on at least part of its surface, between two holding elements, at least one of which is constituted by a strand of belt (1,2). 8.- Device according to claim 7 characterized in that the other holding element is constituted by another strand of belt.
9.- Dispositif suivant la revendication 7 caractérisé en ce que l'autre élément de maintien est constitué par un rouleau.9.- Device according to claim 7 characterized in that the other holding element is constituted by a roller.
10.- Dispositif suivant l'une des revendications précédentes caractérisé en ce que :10.- Device according to one of the preceding claims, characterized in that:
- il comprend au moins quatre courroies (1,2,3,4) qui définissent les deux trajets supérieur et inférieur en fonction de la position du volet (6),- it comprises at least four belts (1,2,3,4) which define the two upper and lower paths as a function of the position of the flap (6),
- en amont du volet (6) une première portion du brin inférieur (la) d'une première courroie (1) ou courroie supérieure, et une première portion du brin supérieur (2a) d'une seconde courroie (2), ou courroie inférieure, sont en contact,- upstream of the flap (6) a first portion of the lower strand (la) of a first belt (1) or upper belt, and a first portion of the upper strand (2a) of a second belt (2), or belt lower, are in contact,
- en aval des moyens de sélection (6) une seconde portion du brin inférieur (lb) de la première courroie (1) est en contact avec le brin supérieur (3a) d'une troisième courroie (3) et une seconde portion du brin supérieur (2b) de la seconde courroie (2) est en contact avec le brin inférieur (4a) d'une quatrième courroie (4) .- downstream of the selection means (6) a second portion of the lower strand (lb) of the first belt (1) is in contact with the upper strand (3a) of a third belt (3) and a second portion of the strand upper (2b) of the second belt (2) is in contact with the lower strand (4a) of a fourth belt (4).
11.- Dispositif suivant la revendication 10 caractérisé en ce que seule l'une des dites courroies (2) est pourvue de moyens mécaniques propres d'entraînement, les autres courroies étant entraînées par frottement sur celle-ci. 12.- Dispositif suivant l'une des revendications précédentes caractérisé en ce que tous ses éléments mécaniques sont disposés sur une platine unique de façon à constituer un module réglable et positionnable de façon autonome.11.- Device according to claim 10 characterized in that only one of said belts (2) is provided with own mechanical drive means, the other belts being driven by friction thereon. 12.- Device according to one of the preceding claims characterized in that all its mechanical elements are arranged on a single plate so as to constitute an adjustable and positionable module independently.
13.- Dispositif suivant l'une des revendications précédentes caractérisé en que le volet (6) est monté sur un levier mobile (20) autour d'un axe de rotation aval (22) sous l'action d'un vérin (18) commandé par une vanne pneumatique rapide (16) alimentée par un réservoir d'air sous pression (14). 13.- Device according to one of the preceding claims characterized in that the flap (6) is mounted on a movable lever (20) around a downstream axis of rotation (22) under the action of a jack (18) controlled by a rapid pneumatic valve (16) supplied by a pressurized air tank (14).
EP96913572A 1995-04-11 1996-04-11 Device for selecting cut paperboard blanks Expired - Lifetime EP0765195B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9504339A FR2732909B1 (en) 1995-04-11 1995-04-11 DEVICE FOR SELECTING CUT CARDBOARD BLANKS
FR9504339 1995-04-11
PCT/FR1996/000550 WO1996032206A1 (en) 1995-04-11 1996-04-11 Device for selecting cut paperboard blanks

Publications (2)

Publication Number Publication Date
EP0765195A1 true EP0765195A1 (en) 1997-04-02
EP0765195B1 EP0765195B1 (en) 2000-12-13

Family

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Application Number Title Priority Date Filing Date
EP96913572A Expired - Lifetime EP0765195B1 (en) 1995-04-11 1996-04-11 Device for selecting cut paperboard blanks

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US (1) US5979891A (en)
EP (1) EP0765195B1 (en)
JP (1) JP3794025B2 (en)
DE (1) DE69611212T2 (en)
FR (1) FR2732909B1 (en)
WO (1) WO1996032206A1 (en)

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Also Published As

Publication number Publication date
FR2732909A1 (en) 1996-10-18
JPH10501512A (en) 1998-02-10
DE69611212T2 (en) 2001-06-07
DE69611212D1 (en) 2001-01-18
US5979891A (en) 1999-11-09
FR2732909B1 (en) 1997-05-30
EP0765195B1 (en) 2000-12-13
JP3794025B2 (en) 2006-07-05
WO1996032206A1 (en) 1996-10-17

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