EP2341026B1 - Folding device comprising one ore more belts for carrying out an alternating movement between two positions. - Google Patents

Folding device comprising one ore more belts for carrying out an alternating movement between two positions. Download PDF

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Publication number
EP2341026B1
EP2341026B1 EP10306525.6A EP10306525A EP2341026B1 EP 2341026 B1 EP2341026 B1 EP 2341026B1 EP 10306525 A EP10306525 A EP 10306525A EP 2341026 B1 EP2341026 B1 EP 2341026B1
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EP
European Patent Office
Prior art keywords
belt
folding device
folded
folding
mobile support
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.)
Not-in-force
Application number
EP10306525.6A
Other languages
German (de)
French (fr)
Other versions
EP2341026A1 (en
Inventor
Philippe François Herda
Jérôme Jean-Michel Peres
Thierry-Bernard Vauchelle
Thierry Henri Melon
Jean-François Robert
Eric Pierda
Franck Chagnon
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.)
Goss International Montataire SA
Original Assignee
Goss International Montataire SA
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Filing date
Publication date
Application filed by Goss International Montataire SA filed Critical Goss International Montataire SA
Publication of EP2341026A1 publication Critical patent/EP2341026A1/en
Application granted granted Critical
Publication of EP2341026B1 publication Critical patent/EP2341026B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/18—Oscillating or reciprocating blade folders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/14—Retarding or controlling the forward movement of articles as they approach stops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/26—Particular arrangement of belt, or belts
    • B65H2404/261—Arrangement of belts, or belt(s) / roller(s) facing each other for forming a transport nip
    • B65H2404/2614—Means for engaging or disengaging belts into or out of contact with opposite belts, rollers or balls

Definitions

  • the present invention relates to a folding device according to the preamble of claim 1.
  • the document FR-2 676 390 A1 also discloses a folding device.
  • This document describes a folder in which signatures seized between upper and lower conveyor belts are conveyed by them to a folding table to be folded lengthwise by the action of a folding blade.
  • the upper strands of the lower conveyor belts are supported by band rollers 16 horizontally movable jointly or individually.
  • band rollers 16 horizontally movable jointly or individually.
  • An object of the invention is therefore to provide a folding device ensuring an improved folding of the products to be folded.
  • the invention proposes a folding device of the aforementioned type, characterized by the characterizing part of claim 1.
  • the figure 1 is a view from above according to the arrows B of the figure 2 of a first embodiment of a folding device 2 according to the invention.
  • the folding device 2 is located downstream of a printing unit and possibly a not shown cutting device from which it receives printed signatures to be folded.
  • the folding device 2 comprises a folding table 4 of a width I, a first and second frame 6, 8, two folding rollers 10 and 12, a folding blade 14, a set of driven conveyor belts, and moving means 20, 22 of a portion of the belts with respect to the folding table 4.
  • the folding rollers 10 and 12 are located below the folding table 4, on either side of a slot 24 formed in the table 4.
  • the folding blade 14 is arranged above the table 4 and can to be inserted into the slot 24.
  • the folding blade 14 defines a fold plane PP extending perpendicularly with respect to the folding table 4.
  • Signature stop stops (not shown) are arranged in the vicinity first frame 6.
  • the driven conveyor belt assembly includes a first upper belt bench 16 and an associated lower belt bench, as well as a second upper belt bench 18 and associated lower belt bench.
  • the displacement means 20 are associated with the first bench 16, while the displacement means 22 are associated with the second bench 18.
  • the construction and operation of the benches 16 and 18 of upper belts and moving means 20 and 22 are identical. Indeed, the folding device 2 is of symmetrical construction with respect to the fold plane PP. Therefore, it will be limited to a description of the construction and operation of the bank of upper belts 16 and 20 associated displacement means.
  • the bench 16 comprises a set of several upper belts, in this case four designated belts, a, b, c, d, on which the displacement means 20 act, and an individual upper belt e devoid of displacement means.
  • the belts a to e are driven belts, that is to say driven in circulation.
  • the individual belt is the belt closest to the slot 24.
  • Each upper belt has to d is carried by a total of six pulleys, including four pulleys 48 attached to supports 38 and 40 connected to the frames 6 and 8, and two movable pulleys 46 (cf. figure 2 ). Each movable pulley 46 is applied against a section 49 of the associated upper belt. Subsequently, these sections 49 will be called "ends" of the upper belt.
  • the displacement means 20 are adapted to move the upper belts a to d relative to a routing plane 26 defined by the folding table 4 between a first low position Pb (cf. figure 2 ) and a second high position Ph (cf. figure 3 ).
  • the displacement means 20 are of symmetrical construction with respect to a vertical median plane 28 perpendicular to the folding plane PP and to the routing plane 26.
  • the displacement means 20 comprise a single camshaft 30 provided with a cam 58 which interacts, on each side of the plane 28, with a pivoting assembly 32, 34.
  • the cam 58 is generally elliptical in shape with a center O, a small axis x and a major axis y.
  • the surface of the cam 58 is divided into surface sections 60 near the center O and in surface sections 62 remote from the center O.
  • Each pivoting assembly 32, 34 comprises a rod 36 housed around a pivoting axis X-X pivoting in the two supports 38 and 40.
  • Each pivoting assembly 32, 34 comprises a set of four support levers 41 and a control lever 42.
  • Each support lever 41 has a first end 50 rotatably attached to the pivoting rod 36.
  • Each support lever 41 has a pivot axis 54 at the first end 50 which coincides with the pivot axis XX.
  • Each support lever 41 also has a second end 44 provided with one of the movable pulleys 46 (see FIG. figure 2 ).
  • Each movable pulley 46 serves to guide and position the associated upper belt a, b, c, d with respect to the routing plane 26.
  • the control lever 42 differs from the support levers 41 by its orientation.
  • the control lever 42 forms an obtuse angle with the support levers 41.
  • the control lever 42 has a first end 43 with which it is fixed in rotation to the rod 36.
  • the control lever 42 has a pivot axis 54 at the first end 43 which coincides with that of the support levers 41 and with the pivot axis XX.
  • the control lever 42 cooperates with the cam shaft 30. More specifically, the control lever 42 has a second end 52 opposite the first end 43 which is provided with a cam follower or follower 56 in contact with the cam 58 of the camshaft 30.
  • the roller 56 of the control lever 42 of each pivoting assembly 32, 34 cooperates with the same cam 58.
  • the cam 58 is thus a common cam of the two rollers 56.
  • Each roller 56 is biased towards the surface of the cam 58 by unrepresented spring elements. It can especially be compression springs or torsion bars.
  • Each signature has a width, that is to say a transverse dimension perpendicular to the routing direction F and parallel to the routing plane 26, which is substantially equal to the width 1 (cf. figure 1 ) of the folding table 4.
  • the course of an exemplary signature S, represented on the extreme left of the figure 2 inside the folding device 2 is as follows.
  • the signature S is grasped between the benches 16 and 18 of upper belts a to e and the benches corresponding lower belts.
  • the upper and lower belts are driven in the direction of conveyance F to convey the signature S on the folding table 4, below and in front of the folding blade 14.
  • the signature S is immobilized on the folding table 4 with the stops (not shown) located on the side of the frame 6.
  • the folding blade 14 is lowered according to the arrow G shown in FIG. figure 2 .
  • the middle zone of the signature S is pushed through the slot 24 by the action of the edge of the folding blade 14 and then swallowed by the folding rollers 10 and 12 in rotation.
  • the signature S is thus folded resulting in a fold called "square fold".
  • the upper belts a d move away from several millimeters of the lower belts at each signature passage S before the signature S has been immobilized, in particular by the stops, and before it is engaged by the blade 14 in the slot 24 of the table 4.
  • the figure 2 shows a signature S at the beginning of routing by the belts towards the folding table 4.
  • the upper belt a is in the low position Pb and exerts a first routing pressure P1 on the signature S which is sufficient to drive it in the direction of the arrow F.
  • the signature S is thus clamped between the upper belt a and the lower belt ⁇ .
  • the lower position Pb of the upper belt a is defined by the size of the small axis x of the cam 58.
  • the rollers 56 of the control levers 42 are in contact with the surface sections 60 of the cam 58.
  • the control levers 42 are then in the retracted position as illustrated in FIG. figure 2 .
  • the movable pulleys 46 attached to the support levers 41 are in the low position and apply the upper belt a against the surface of the signature S.
  • the signature S is conveyed by the belts in the direction of conveyance F towards the folding position. Meanwhile, the cam 58 rotates along the arrow H indicated on the figure 2 . When the signature S is about to abut against the stops not shown, the cam 58 has made about a quarter of a turn to arrive at the position indicated in FIG. figure 3 .
  • the rollers 56 of the control levers 42 have rolled on the cam surface (see the arrows M) and are then in contact with the surface sections 62 of the cam 58. This rotational movement of the cam 58 generates a spacing of control levers 42 to a position of maximum spacing defined by the major axis y of the cam 58. Accordingly, the control levers 42 move according to the arrows J shown in FIG.
  • FIG. figure 3 that is, outward and downward.
  • the control levers 42 drive the rods 36 and thus the support levers 41, as indicated by the arrows K. It follows a displacement of the movable pulleys 46 and thus a lifting of the upper belt a in the direction D indicated in FIG. figure 3 .
  • An interstice i of a few millimeters is thus created between the upper belt a and the lower belt ⁇ .
  • the upper belt a is then in a release position where it exerts a second pressure P2 on the signature S which is less than the delivery pressure P1.
  • the second pressure P2 may even be equal to 0 Pa, the upper belts then being, in the release position Ph, out of contact with the signature S.
  • the second pressure P2 is greater than or equal to 0 Pa, and preferably is strictly greater than 0 Pa.
  • the relaxation of the signature S is preferably performed before this signature S abuts against the stops. Thus the crash of the signature on the stops is reduced.
  • the camshaft 30 is driven so as to obtain a recovery of the upper belts for each signature S to be folded.
  • the upper belts have d perform an alternating movement between the two positions Pb and Ph shown at Figures 2 and 3 .
  • the rotation of the camshaft 30 is adjusted by a control means not shown at a frequency F r which is substantially equal to half the frequency of routing of the signatures S.
  • the use of a generally elliptical shape cam as shown in FIGS. Figures 2 and 3 is not limiting. It is conceivable to use a cam of different shape or even an eccentric, the rotation frequency F r must then be adapted to the shape of the cam or eccentric chosen. More generally, the frequency F r may be such that F r is equal to F a / n where F a is the routing frequency of the signatures S, and n is a positive integer.
  • FIGs 4 and 5 show a first variant of the first embodiment of the folding device.
  • This variant differs from the folding device previously described by the following.
  • the single shaft has been replaced by two cam shafts 64 each acting on one of the control levers 42.
  • Figures 2 and 3 where the common cam 58 is between the two control levers 42, it is the ends 52 of the control levers 42 which are located between the two cams 66.
  • the two cams 66 rotate at the same frequency, that is to say are synchronized, but in the opposite direction, as indicated by the arrows H.
  • the figure 4 shows, like the figure 2 , the low position Pb, while the figure 5 shows, like the figure 3 , the high position Ph.
  • FIGs 6 and 7 illustrate a second variant similar to that of Figures 4 and 5 with the difference that one of the two shafts 64 is immobilized.
  • the low position Pb of the figure 6 is identical to that of the figure 4 .
  • the upper belt a only rises on one side at an angle ⁇ with respect to the folding table 4.
  • the upper belt a is inclined relative to to the routing plan.
  • the belt is inclined so that it is raised on a head side of the signature, therefore downstream of the direction of routing F.
  • the belt is inclined relative to the table 4 so that it is raised on a tail side of the signature, so upstream of the direction of routing F.
  • the Figures 8 to 10 show a second embodiment 3 of a folding device according to the invention.
  • This second embodiment is identical to the first of its displacement means 20 and 22 of two sets of upper belts a d.
  • the upper belts which are lowered and timed up are not signature conveyor belts but additional static braking belts.
  • the additional upper belts a to d are not driven and are fixed at their ends 68 with screws 70 to the supports 38, 40.
  • the upper braking belts have additional d are housed between upper belts e and lower d routing.
  • the second embodiment 3 of the folding device operates as follows.
  • a signature S is conveyed by the conveyor belts e, ⁇ on the folding table 4 in the direction indicated by the arrow F.
  • the upper braking belt a is in a high position Ph and shifted height relative to the conveyor belts e, a gap i of the order of a few millimeters.
  • the rollers 56 are in contact with the surface sections 62 of the cam 58 so that the two control levers 42 are in the spaced apart position.
  • the cam 58 continues to rotate until it reaches the position illustrated in FIG. figure 10 .
  • the rotation frequency of the camshaft 30 as well as its phase are adjusted so that the upper braking belts have to lower each time a signature S is passed to slow it down before it passes. is engaged by the folding blade 14 in the slot 24 of the folding table 4 and then swallowed by the folding rollers 10, 12. Down to the signature S in motion, the upper braking belts a to d come into contact with this one to brake it by friction. During braking, the cam 58 continues to rotate until it reaches the position shown in FIG. figure 9 . The upper braking belts are raised, the S signature folded and the cycle starts again.
  • the rotation frequency F r of the camshaft 30 is set such that F r is equal to F a / n, where F a is the routing frequency of the products to be folded, and n is a positive integer.
  • the means 20, 22 for moving the belts described above can also be entirely below the folding table.
  • the principles developed above can also be applied to lower conveyor belts. It is then the lower belts ⁇ which are moved in a clockwise manner and no longer the upper belts.
  • the displacement means 20, 22 can also be modified to move a number of belts different from that of the embodiments described. With reference to the figure 1 the displacement means 20, 22 could be modified in order to limit the displacement, for example, of the only belts a and b. Other variants are possible depending on the desired application.
  • levers 41, 42 can be actuated by means other than camshafts.
  • camshafts could be replaced by jacks or electromagnets.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Description

La présente invention concerne un dispositif de pliage selon le préambule de la revendication 1.The present invention relates to a folding device according to the preamble of claim 1.

Un tel dispositif est connu de EP807 597 .Such a device is known to EP807 597 .

Le document FR-2 676 390 A1 décrit également un dispositif de pliage.The document FR-2 676 390 A1 also discloses a folding device.

Ce document décrit une plieuse dans laquelle des signatures saisies entre des bandes de transport supérieures et inférieures sont acheminées par celles-ci vers une table de pliage pour être plié en long sous l'action d'une lame de pliage. Les brins supérieurs des bandes de transport inférieures sont soutenus par des rouleaux à bande 16 déplaçables horizontalement conjointement ou individuellement. En déplaçant manuellement les rouleaux à bande 16, on peut faire varier l'angle d'inclinaison des brins supérieurs des bandes de transport inférieures par rapport à la surface de la table de pliage, le but étant de modifier l'intensité d'impact des signatures à plier et d'établir une adaptation à la sorte du papier et à l'épaisseur de la signature.This document describes a folder in which signatures seized between upper and lower conveyor belts are conveyed by them to a folding table to be folded lengthwise by the action of a folding blade. The upper strands of the lower conveyor belts are supported by band rollers 16 horizontally movable jointly or individually. By manually moving the web rollers 16, the angle of inclination of the upper strands of the lower conveyor belts relative to the surface of the folding table can be varied, the aim being to change the impact intensity of the signatures to fold and establish an adaptation to the kind of paper and the thickness of the signature.

Néanmoins, on constate qu'avec cette solution connue, le freinage des produits à plier et leur avalement par les rouleaux de pliage ne sont pas toujours satisfaisants, ce qui nuit à la qualité du pliage.Nevertheless, it is found that with this known solution, the braking of the products to be folded and their swallowing by the folding rolls are not always satisfactory, which affects the quality of the folding.

Un but de l'invention est donc de réaliser un dispositif de pliage assurant un pliage amélioré des produits à plier.An object of the invention is therefore to provide a folding device ensuring an improved folding of the products to be folded.

Afin d'atteindre ce but, l'invention propose un dispositif de pliage du type précité, caractérisé par la partie caractérisante de la revendication 1.In order to achieve this object, the invention proposes a folding device of the aforementioned type, characterized by the characterizing part of claim 1.

En prévoyant des moyens de déplacement alternant la courroie entre les deux positions, il devient possible de faire varier la pression exercée par la courroie sur le produit à plier au cours du fonctionnement du dispositif de pliage. Ainsi, on peut notamment faciliter l'avalement du produit à plier par les rouleaux de pliage lors de la réalisation du pli, réduire l'écrasement des produits à plier sur les butées de la table de pliage et améliorer le freinage des produits à plier.By providing means of displacement alternating the belt between the two positions, it becomes possible to vary the pressure exerted by the belt on the product to be folded during operation of the folding device. Thus, it can in particular facilitate the swallowing of the product to be folded by the folding rollers during the production of the fold, reduce the crushing of the products to be folded on the stops of the folding table and improve the braking of the products to be folded.

Selon d'autres modes de réalisation, le dispositif de pliage comporte une ou plusieurs des caractéristiques suivantes, prise(s) isolément ou selon toutes les combinaisons techniquement possibles :

  • les moyens de déplacement de la ou de chaque première courroie comprennent pour chaque première courroie :
    • un premier organe de guidage autour duquel la première courroie (d) est guidée ;
    • un premier organe de support mobile portant le premier organe de guidage ; et
    • un premier moyen d'actionnement cadencé du premier organe de support mobile en va et vient, qui est adapté pour déplacer la première courroie (d) entre la première (Pb) et la deuxième (Ph) positions ;
  • les moyens de déplacement de la ou de chaque première courroie comprennent en outre pour chaque première courroie:
    • un second organe de guidage autour duquel la première courroie (d) est guidée ;
    • un second organe de support mobile portant le second organe de guidage ; et
    • un second moyen d'actionnement cadencé du second organe de support mobile en va et vient qui est adapté pour déplacer la première courroie (d) entre la première et la deuxième position ;
  • le ou chaque premier, ou le cas échéant second, organe de support mobile est un levier pivotant disposant d'une première extrémité, qui est une extrémité de positionnement de la courroie par rapport au plan d'acheminement et qui porte l'organe de guidage associé, et d'une deuxième extrémité qui est logée d'une manière pivotante.
  • les moyens de déplacement de la ou de chaque première courroie comprennent, pour chaque organe de support mobile, un levier de commande qui est fixé en rotation à l'organe de support mobile associé et qui coopère avec le premier ou second moyen d'actionnement cadencé associé ;
  • le ou chaque premier ou second moyen d'actionnement cadencé comprend un arbre à came ou à excentrique, un vérin ou un électro-aimant, le cas échéant le moyen d'actionnement cadencé agissant sur le levier de commande ;
  • chacun des premier et second organes de support mobile forme une extrémité de la première courroie, le premier et second organes de support mobile sont agencés en face l'un de l'autre, et agissent respectivement sur l'extrémité associée de la première courroie de manière à permettre ou à générer un déplacement de la courroie dans une direction perpendiculaire au plan d'acheminement ;
  • le premier et le second moyens d'actionnement cadencés comprennent un organe d'actionnement commun, notamment une came commune ;
  • le premier et le second moyens d'actionnement cadencés comprennent deux organes d'actionnement distincts, notamment deux cames distinctes ;
  • la deuxième position est une position d'inclinaison de la courroie par rapport au plan d'acheminement et la première position est une position où la courroie est parallèle au plan d'acheminement ;
  • le dispositif de pliage comprend une première courroie supplémentaire adaptée pour agir dans le plan d'acheminement sur le produit à plier afin de le positionner en face de l'organe de pliage ; et
  • les moyens de déplacement de la première courroie supplémentaire comprennent des moyens de synchronisation reliant le premier organe de support mobile de la première courroie supplémentaire au premier organe de support mobile de la première courroie pour un mouvement synchrone de ces deux organes de support en vue d'un entraînement synchrone des premières courroies entre les première et deuxième positions;
  • la ou chaque première courroie est une courroie entraînée d'acheminement du produit à plier, et dans lequel la première position est une position d'acheminement du produit à plier et la deuxième position est une position de relâchement du produit à plier ;
  • la ou chaque première courroie est une courroie statique de freinage du produit à plier, et dans lequel la première position est une position de freinage du produit à plier et la deuxième position est une position de retrait de la ou chaque courroie ;
  • la deuxième pression est supérieure ou égale à 0 Pa, et de préférence est strictement supérieur à 0 Pa ;
  • le dispositif de pliage comprend un suiveur de came pour chaque organe de support mobile ; chaque suiveur de came coopère avec la came commune ;
  • un premier suiveur de came coopère avec l'une des deux cames distinctes, et un deuxième suiveur de came coopère avec l'autre des deux cames distinctes ;
  • le dispositif de pliage comprend un moyen de contrôle apte à régler le ou chaque moyen d'actionnement cadencé à une fréquence d'actionnement Fr telle que : Fr = Fa / n, où Fa est la fréquence d'acheminement des produits à plier, et n est un nombre entier positif ;
  • les moyens de déplacement sont adaptés pour prendre leur position de relâchement avant que le produit plié ne bute contre une butée d'arrêt ;
  • les premières et deuxièmes positions sont des positions extrêmes ;
  • le dispositif comprend au moins une deuxième courroie notamment d'acheminement entrainée et cette deuxième courroie est la courroie la plus proche de la fente.
According to other embodiments, the folding device comprises one or more of the following characteristics, taken in isolation or in any technically possible combination:
  • the displacement means of the or each first belt comprise for each first belt:
    • a first guide member around which the first belt (d) is guided;
    • a first movable support member carrying the first guide member; and
    • a first clockwise actuating means of the first movable support member reciprocating, which is adapted to move the first belt (d) between the first (Pb) and the second (Ph) positions;
  • the displacement means of the or each first belt further comprise for each first belt:
    • a second guide member around which the first belt (d) is guided;
    • a second movable support member carrying the second guide member; and
    • second clockwise operating means of the second reciprocating movable support member which is adapted to move the first belt (d) between the first and second positions;
  • the or each first or, if appropriate, second, movable support member is a pivoting lever having a first end, which is a positioning end of the belt relative to the conveying plane and which carries the guide member associated, and a second end which is housed in a pivoting manner.
  • the displacement means of the or each first belt comprise, for each movable support member, a control lever which is fixed in rotation to the associated movable support member and which cooperates with the first or second actuating means partner;
  • the or each first or second clocked actuating means comprises a cam or eccentric shaft, a jack or an electromagnet, if necessary the clockwise actuating means acting on the control lever;
  • each of the first and second movable support members forms an end of the first belt, the first and second movable support members are arranged opposite one another, and respectively act on the associated end of the first belt of the first belt. to allow or generate a movement of the belt in a direction perpendicular to the routing plane;
  • the first and second clocked actuating means comprise a common actuating member, in particular a common cam;
  • the first and second clocked actuating means comprise two distinct actuating members, in particular two distinct cams;
  • the second position is a position of inclination of the belt relative to the plane of routing and the first position is a position where the belt is parallel to the routing plane;
  • the folding device comprises a first additional belt adapted to act in the conveying plane on the product to be folded in order to position it in front of the folding member; and
  • the means for moving the first additional belt comprise synchronization means connecting the first movable support member of the first additional belt to the first movable support member of the first belt for synchronous movement of these two support members in order to a synchronous drive of the first belts between the first and second positions;
  • the or each first belt is a driven belt for conveying the product to be folded, and wherein the first position is a conveying position of the product to be folded and the second position is a release position of the product to be folded;
  • the or each first belt is a static braking belt of the product to be folded, and wherein the first position is a braking position of the product to be folded and the second position is a retracted position of the or each belt;
  • the second pressure is greater than or equal to 0 Pa, and preferably is strictly greater than 0 Pa;
  • the folding device comprises a cam follower for each movable support member; each cam follower cooperates with the common cam;
  • a first cam follower cooperates with one of the two distinct cams, and a second cam follower cooperates with the other of the two separate cams;
  • the folding device comprises a control means adapted to adjust the or each actuating means clocked at an operating frequency Fr such that: Fr = Fa / n, where Fa is the routing frequency of the products to be folded, and n is a positive integer;
  • the displacement means are adapted to take their release position before the folded product stops against a stop;
  • the first and second positions are extreme positions;
  • the device comprises at least a second conveyed belt including driven and this second belt is the belt closest to the slot.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et faite en se référant aux dessins annexés sur lesquels :

  • la figure 1 est une vue de dessus d'un premier mode de réalisation d'un dispositif de pliage selon l'invention ;
  • les figures 2 et 3 sont des vues de face du dispositif de la figure 1 selon les flèches A illustrant les positions d'acheminement et de relâchement ;
  • les figures 4 et 5 sont des vues analogues à celles des figures 2 et 3, illustrant une première variante du mode de réalisation de la figure 1 ;
  • les figures 6 et 7 sont des vues analogues aux figures 2 et 3 illustrant une deuxième variante du mode de réalisation de la figure 1 ;
  • la figure 8 est une vue de dessus d'un deuxième mode de réalisation d'un dispositif de pliage selon l'invention ; et
  • les figures 9 et 10 sont des vues de face du mode de réalisation de la figure 8 selon les flèches A illustrant les positions de retrait et de freinage.
The invention will be better understood on reading the description which follows, given solely by way of example, and with reference to the appended drawings, in which:
  • the figure 1 is a top view of a first embodiment of a folding device according to the invention;
  • the Figures 2 and 3 are front views of the device of the figure 1 according to the arrows A illustrating the positions of routing and release;
  • the Figures 4 and 5 are views similar to those of Figures 2 and 3 , illustrating a first variant of the embodiment of the figure 1 ;
  • the Figures 6 and 7 are views similar to Figures 2 and 3 illustrating a second variant of the embodiment of the figure 1 ;
  • the figure 8 is a top view of a second embodiment of a folding device according to the invention; and
  • the Figures 9 and 10 are front views of the embodiment of the figure 8 according to the arrows A illustrating the positions of withdrawal and braking.

La figure 1 est une vue de dessus selon les flèches B de la figure 2 d'un premier mode de réalisation d'un dispositif de pliage 2 selon l'invention. Le dispositif de pliage 2 se situe en aval d'une unité d'impression et éventuellement d'un dispositif de découpe non représentés dont il reçoit des signatures imprimées à plier.The figure 1 is a view from above according to the arrows B of the figure 2 of a first embodiment of a folding device 2 according to the invention. The folding device 2 is located downstream of a printing unit and possibly a not shown cutting device from which it receives printed signatures to be folded.

Le dispositif de pliage 2 comprend une table de pliage 4 d'une largeur I, un premier et deuxième bâtis 6, 8, deux rouleaux de pliage 10 et 12, une lame de pliage 14, un ensemble de courroies d'acheminement entraînées, et des moyens de déplacement 20, 22 d'une partie des courroies par rapport à la table de pliage 4.The folding device 2 comprises a folding table 4 of a width I, a first and second frame 6, 8, two folding rollers 10 and 12, a folding blade 14, a set of driven conveyor belts, and moving means 20, 22 of a portion of the belts with respect to the folding table 4.

Les rouleaux de pliage 10 et 12 se situent en dessous de la table de pliage 4, de part et d'autre d'une fente 24 ménagée dans la table 4. La lame de pliage 14 est agencée au dessus de la table 4 et peut être abaissée pour s'insérer dans la fente 24. La lame de pliage 14 définit un plan de pliage PP s'étendant perpendiculairement par rapport à la table de pliage 4. Des butées d'arrêt de signatures (non représentées) sont disposées à proximité du premier bâti 6.The folding rollers 10 and 12 are located below the folding table 4, on either side of a slot 24 formed in the table 4. The folding blade 14 is arranged above the table 4 and can to be inserted into the slot 24. The folding blade 14 defines a fold plane PP extending perpendicularly with respect to the folding table 4. Signature stop stops (not shown) are arranged in the vicinity first frame 6.

L'ensemble de courroies d'acheminement entraînées comprend un premier banc 16 de courroies supérieures et un banc de courroies inférieures associé, ainsi qu' un deuxième banc 18 de courroies supérieures et banc de courroies inférieures associé. Les moyens de déplacement 20 sont associés au premier banc 16, tandis que les moyens de déplacement 22 sont associés au deuxième banc 18.The driven conveyor belt assembly includes a first upper belt bench 16 and an associated lower belt bench, as well as a second upper belt bench 18 and associated lower belt bench. The displacement means 20 are associated with the first bench 16, while the displacement means 22 are associated with the second bench 18.

La construction et le fonctionnement des bancs 16 et 18 de courroies supérieures et des moyens de déplacement 20 et 22 sont identiques. En effet, le dispositif de pliage 2 est d'une construction symétrique par rapport au plan de pliage PP. Par conséquent, on se limitera à une description de la construction et du fonctionnement du banc 16 de courroies supérieures et des moyens de déplacement 20 associés.The construction and operation of the benches 16 and 18 of upper belts and moving means 20 and 22 are identical. Indeed, the folding device 2 is of symmetrical construction with respect to the fold plane PP. Therefore, it will be limited to a description of the construction and operation of the bank of upper belts 16 and 20 associated displacement means.

Le banc 16 comprend un jeu de plusieurs courroies supérieures, en l'occurrence quatre courroies désignées, a, b, c, d, sur lequel agissent les moyens de déplacement 20, ainsi qu'une courroie supérieure individuelle e dépourvue de moyens de déplacement.The bench 16 comprises a set of several upper belts, in this case four designated belts, a, b, c, d, on which the displacement means 20 act, and an individual upper belt e devoid of displacement means.

Les courroies a à e sont des courroies entraînées, c'est à dire entraînées en circulation. La courroie e individuelle est la courroie la plus proche de la fente 24.The belts a to e are driven belts, that is to say driven in circulation. The individual belt is the belt closest to the slot 24.

Ainsi, la signature passant dans la fente 24 est guidée par la courroie e et la formation de plis par « coup de fouet » est évitée.Thus, the signature passing through the slot 24 is guided by the belt e and the formation of folds by "whiplash" is avoided.

Chaque courroie supérieure a à d est portée par une totalité de six poulies, dont quatre poulies 48 fixées à des supports 38 et 40 reliés aux bâtis 6 et 8, et deux poulies mobiles 46 (cf. figure 2). Chaque poulie mobile 46 s'applique contre une section 49 de la courroie supérieure associée. Par la suite, ces sections 49 seront qualifiées « d'extrémités » de la courroie supérieure.Each upper belt has to d is carried by a total of six pulleys, including four pulleys 48 attached to supports 38 and 40 connected to the frames 6 and 8, and two movable pulleys 46 (cf. figure 2 ). Each movable pulley 46 is applied against a section 49 of the associated upper belt. Subsequently, these sections 49 will be called "ends" of the upper belt.

En référence aux figures 2 et 3, on distingue une courroie inférieure δ du banc de courroies inférieures associé au banc 16 de courroies supérieures. Chacune des courroies supérieures a à e est associée à une telle courroie inférieure correspondante.With reference to Figures 2 and 3 , there is a lower belt δ of the lower belt bench associated with the bench 16 of upper belts. Each of the upper belts has e associated with such corresponding lower belt.

Les moyens de déplacement 20 sont adaptés pour déplacer les courroies supérieures a à d par rapport à un plan d'acheminement 26 défini par la table de pliage 4 entre une première position basse Pb (cf. figure 2) et une deuxième position haute Ph (cf. figure 3). Les moyens de déplacement 20 sont de construction symétrique par rapport à un plan médian vertical 28 perpendiculaire au plan de pliage PP et au plan d'acheminement 26. Les moyens de déplacement 20 comprennent un seul arbre à came 30 munie d'une came 58 qui interagit, de chaque côté du plan 28, avec un ensemble pivotant 32, 34.The displacement means 20 are adapted to move the upper belts a to d relative to a routing plane 26 defined by the folding table 4 between a first low position Pb (cf. figure 2 ) and a second high position Ph (cf. figure 3 ). The displacement means 20 are of symmetrical construction with respect to a vertical median plane 28 perpendicular to the folding plane PP and to the routing plane 26. The displacement means 20 comprise a single camshaft 30 provided with a cam 58 which interacts, on each side of the plane 28, with a pivoting assembly 32, 34.

La came 58 est de forme généralement elliptique avec un centre O, un petit axe x et un grand axe y. La surface de la came 58 est divisée en sections de surface 60 proches du centre O et en sections de surface 62 éloignées du centre O.The cam 58 is generally elliptical in shape with a center O, a small axis x and a major axis y. The surface of the cam 58 is divided into surface sections 60 near the center O and in surface sections 62 remote from the center O.

Chaque ensemble pivotant 32, 34 comporte une tige 36 logée autour d'un axe de pivotement X-X pivotante dans les deux supports 38 et 40. Chaque ensemble pivotant 32, 34 comporte un jeu de quatre leviers de support 41 et un levier de commande 42.Each pivoting assembly 32, 34 comprises a rod 36 housed around a pivoting axis X-X pivoting in the two supports 38 and 40. Each pivoting assembly 32, 34 comprises a set of four support levers 41 and a control lever 42.

Chaque levier de support 41 dispose d'une première extrémité 50 fixée en rotation à la tige pivotante 36. Chaque levier de support 41 a un axe de pivotement 54 au niveau de la première extrémité 50 qui coïncide avec l'axe de pivotement X-X. Chaque levier de support 41 dispose en outre d'une deuxième extrémité 44 munie de l'une des poulies mobiles 46 (cf. la figure 2). Chaque poulie mobile 46 sert à guider et à positionner la courroie supérieure associée a, b, c, d par rapport au plan d'acheminement 26.Each support lever 41 has a first end 50 rotatably attached to the pivoting rod 36. Each support lever 41 has a pivot axis 54 at the first end 50 which coincides with the pivot axis XX. Each support lever 41 also has a second end 44 provided with one of the movable pulleys 46 (see FIG. figure 2 ). Each movable pulley 46 serves to guide and position the associated upper belt a, b, c, d with respect to the routing plane 26.

Le levier de commande 42 diffère des leviers de support 41 de par son orientation. Le levier de commande 42 forme un angle obtus avec les leviers de support 41.The control lever 42 differs from the support levers 41 by its orientation. The control lever 42 forms an obtuse angle with the support levers 41.

Le levier de commande 42 comporte une première extrémité 43 avec laquelle il est fixé en rotation à la tige 36. Le levier de commande 42 a un axe de pivotement 54 au niveau de la première extrémité 43 qui coïncide avec celui des leviers de support 41 et avec l'axe de pivotement X-X.The control lever 42 has a first end 43 with which it is fixed in rotation to the rod 36. The control lever 42 has a pivot axis 54 at the first end 43 which coincides with that of the support levers 41 and with the pivot axis XX.

Le levier de commande 42 coopère avec l'arbre à came 30. Plus précisément, le levier de commande 42 comporte une deuxième extrémité 52 à l'opposée de la première extrémité 43 qui est munie d'un galet ou suiveur de came 56 en contact avec la came 58 de l'arbre à came 30.The control lever 42 cooperates with the cam shaft 30. More specifically, the control lever 42 has a second end 52 opposite the first end 43 which is provided with a cam follower or follower 56 in contact with the cam 58 of the camshaft 30.

Le galet 56 du levier de commande 42 de chaque ensemble pivotant 32, 34 coopère avec la même came 58. La came 58 est donc une came commune des deux galets 56.The roller 56 of the control lever 42 of each pivoting assembly 32, 34 cooperates with the same cam 58. The cam 58 is thus a common cam of the two rollers 56.

Chaque galet 56 est sollicité vers la surface de la came 58 par des éléments ressorts non représentés. Il peut notamment s'agir de ressorts de compression ou de barres de torsion.Each roller 56 is biased towards the surface of the cam 58 by unrepresented spring elements. It can especially be compression springs or torsion bars.

On va maintenant décrire le fonctionnement du premier mode de réalisation du dispositif de pliage 2 selon l'invention en référence aux figures 1 à 3.The operation of the first embodiment of the folding device 2 according to the invention will now be described with reference to FIGS. Figures 1 to 3 .

Des produits à plier, à savoir des signatures imprimées, sont acheminées vers le dispositif 2 pour subir un pli d'équerre. Le sens d'acheminement des signatures sur la table de pliage 4 est indiqué à la figure 2 par la flèche F. Chaque signature a une largeur, c'est-à-dire une dimension transversale perpendiculaire au sens d'acheminement F et parallèle au plan d'acheminement 26, qui est sensiblement égale à la largeur 1 (cf. figure 1) de la table de pliage 4.Products to be folded, namely printed signatures, are conveyed to the device 2 to undergo a square fold. The direction of routing signatures on the folding table 4 is indicated in the figure 2 by the arrow F. Each signature has a width, that is to say a transverse dimension perpendicular to the routing direction F and parallel to the routing plane 26, which is substantially equal to the width 1 (cf. figure 1 ) of the folding table 4.

Le parcours d'une signature exemplaire S, représentée à l'extrême gauche de la figure 2, à l'intérieur du dispositif de pliage 2 est le suivant. Le long de sa largeur, la signature S est saisie entre les bancs 16 et 18 de courroies supérieures a à e et les bancs de courroies inférieures correspondants. Les courroies supérieures et inférieures sont entraînées dans le sens d'acheminement F afin d'acheminer la signature S sur la table de pliage 4, en dessous et en face de la lame de pliage 14. La signature S est immobilisée sur la table de pliage 4 à l'aide des butées (non représentées) situées du côté du bâti 6. Une fois la signature S immobilisée, la lame de pliage 14 s'abaisse selon la flèche G représentée à la figure 2. La zone médiane de la signature S se trouve poussée à travers la fente 24 par l'action de l'arête de la lame de pliage 14 pour ensuite être avalée par les rouleaux de pliage 10 et 12 en rotation. La signature S subit ainsi un pliage résultant en un pli dénommé « pli d'équerre ».The course of an exemplary signature S, represented on the extreme left of the figure 2 inside the folding device 2 is as follows. Along its width, the signature S is grasped between the benches 16 and 18 of upper belts a to e and the benches corresponding lower belts. The upper and lower belts are driven in the direction of conveyance F to convey the signature S on the folding table 4, below and in front of the folding blade 14. The signature S is immobilized on the folding table 4 with the stops (not shown) located on the side of the frame 6. Once the signature S immobilized, the folding blade 14 is lowered according to the arrow G shown in FIG. figure 2 . The middle zone of the signature S is pushed through the slot 24 by the action of the edge of the folding blade 14 and then swallowed by the folding rollers 10 and 12 in rotation. The signature S is thus folded resulting in a fold called "square fold".

Grâce aux moyens de déplacement cadencés 20, 22 selon l'invention, les courroies supérieures a à d s'éloignent de plusieurs millimètres des courroies inférieures à chaque passage de signature S avant que la signature S a été immobilisée, notamment par les butées, et avant que celle-ci ne soit engagée par la lame 14 dans la fente 24 de la table 4.With the cycled displacement means 20, 22 according to the invention, the upper belts a d move away from several millimeters of the lower belts at each signature passage S before the signature S has been immobilized, in particular by the stops, and before it is engaged by the blade 14 in the slot 24 of the table 4.

La figure 2 montre une signature S en début d'acheminement par les courroies vers la table de pliage 4. La courroie supérieure a se trouve dans la position basse Pb et exerce une première pression d'acheminement P1 sur la signature S qui est suffisante pour l'entraîner dans le sens de la flèche F. La signature S est donc serrée entre la courroie supérieure a et la courroie inférieure δ. La position basse Pb de la courroie supérieure a est définie par la taille du petit axe x de la came 58. En effet, en position basse Pb, les galets 56 des leviers de commande 42 sont en contact avec les sections de surface 60 de la came 58. Les leviers de commande 42 se trouvent alors en position rétractée telle qu'illustrée à la figure 2. Les poulies mobiles 46 attachées aux leviers de support 41 sont en position basse et appliquent la courroie supérieure a contre la surface de la signature S.The figure 2 shows a signature S at the beginning of routing by the belts towards the folding table 4. The upper belt a is in the low position Pb and exerts a first routing pressure P1 on the signature S which is sufficient to drive it in the direction of the arrow F. The signature S is thus clamped between the upper belt a and the lower belt δ. The lower position Pb of the upper belt a is defined by the size of the small axis x of the cam 58. In fact, in the low position Pb, the rollers 56 of the control levers 42 are in contact with the surface sections 60 of the cam 58. The control levers 42 are then in the retracted position as illustrated in FIG. figure 2 . The movable pulleys 46 attached to the support levers 41 are in the low position and apply the upper belt a against the surface of the signature S.

La signature S est acheminée par les courroies dans le sens d'acheminement F vers la position de pliage. Pendant ce temps-là, la came 58 tourne selon la flèche H indiquée sur la figure 2. Lorsque la signature S s'apprête à buter contre les butées non représentées, la came 58 a effectué environ un quart de tour pour arriver à la position indiquée à la figure 3. Les galets 56 des leviers de commande 42 ont roulé sur la surface de came (cf. les flèches M) et sont alors en contact avec les sections de surface 62 de la came 58. Ce mouvement de rotation de la came 58 engendre un écartement des leviers de commande 42 vers une position d'écartement maximale définie par le grand axe y de la came 58. En conséquence, les leviers de commande 42 se déplacent selon les flèches J représentées à la figure 3, c'est-à-dire vers l'extérieur et vers le bas. Les leviers de commande 42 entraînent les tiges 36 et ainsi les leviers de support 41, tel qu'indiqué par les flèches K. Il s'ensuit un déplacement des poulies mobiles 46 et ainsi un soulèvement de la courroie supérieure a dans la direction D indiquée à la figure 3. On crée ainsi un interstice i de quelques millimètres entre la courroie supérieure a et la courroie inférieure δ . La courroie supérieure a se trouve alors dans une position de relâchement où elle exerce une deuxième pression P2 sur la signature S qui est inférieure à la pression d'acheminement P1. La deuxième pression P2 peut même être égale à 0 Pa, les courroies supérieures étant alors, en position de relâchement Ph, hors contact de la signature S.The signature S is conveyed by the belts in the direction of conveyance F towards the folding position. Meanwhile, the cam 58 rotates along the arrow H indicated on the figure 2 . When the signature S is about to abut against the stops not shown, the cam 58 has made about a quarter of a turn to arrive at the position indicated in FIG. figure 3 . The rollers 56 of the control levers 42 have rolled on the cam surface (see the arrows M) and are then in contact with the surface sections 62 of the cam 58. This rotational movement of the cam 58 generates a spacing of control levers 42 to a position of maximum spacing defined by the major axis y of the cam 58. Accordingly, the control levers 42 move according to the arrows J shown in FIG. figure 3 , that is, outward and downward. The control levers 42 drive the rods 36 and thus the support levers 41, as indicated by the arrows K. It follows a displacement of the movable pulleys 46 and thus a lifting of the upper belt a in the direction D indicated in FIG. figure 3 . An interstice i of a few millimeters is thus created between the upper belt a and the lower belt δ. The upper belt a is then in a release position where it exerts a second pressure P2 on the signature S which is less than the delivery pressure P1. The second pressure P2 may even be equal to 0 Pa, the upper belts then being, in the release position Ph, out of contact with the signature S.

De manière plus générale, la deuxième pression P2 est supérieure ou égale à 0 Pa, et de préférence est strictement supérieure à 0 Pa.More generally, the second pressure P2 is greater than or equal to 0 Pa, and preferably is strictly greater than 0 Pa.

On soulage ainsi la signature S peu avant la réalisation du pli d'équerre. Ceci a l'avantage de réduire l'écrasement de la signature S sur les butées et de faciliter l'avalement de la signature S par les rouleaux 10 et 12. En effet, grâce à l'interstice i, les extrémités de la signature S se retirent plus facilement des bancs de courroies d'acheminement.This relieves the signature S shortly before the realization of the square fold. This has the advantage of reducing the crushing of the signature S on the abutments and of facilitating the swallowing of the signature S by the rollers 10 and 12. Indeed, thanks to the gap i, the ends of the signature S remove more easily from conveyor belt benches.

Le relâchement de la signature S est de préférence effectué avant que cette signature S bute contre les butées. Ainsi l'écrasement de la signature sur les butées est réduit.The relaxation of the signature S is preferably performed before this signature S abuts against the stops. Thus the crash of the signature on the stops is reduced.

L'arbre à came 30 est entraîné de manière à obtenir un relèvement des courroies supérieures pour chaque signature S à plier. Ainsi, les courroies supérieures a à d effectuent un mouvement alterné entre les deux positions Pb et Ph montrées aux figures 2 et 3.The camshaft 30 is driven so as to obtain a recovery of the upper belts for each signature S to be folded. Thus, the upper belts have d perform an alternating movement between the two positions Pb and Ph shown at Figures 2 and 3 .

La rotation de l'arbre à came 30 est réglée par un moyen de contrôle non représenté à une fréquence Fr qui est sensiblement égale à la moitié de la fréquence d'acheminement des signatures S.The rotation of the camshaft 30 is adjusted by a control means not shown at a frequency F r which is substantially equal to half the frequency of routing of the signatures S.

L'utilisation d'une came de forme généralement elliptique telle que représentée aux figures 2 et 3 n'est pas limitative. On peut envisager d'utiliser une came de forme différente ou même un excentrique, la fréquence de rotation Fr devant alors être adaptée à la forme de la came ou de l'excentrique choisi. De manière plus générale, la fréquence Fr peut être telle que Fr est égale à Fa / n où Fa est la fréquence d'acheminement des signatures S, et n est un nombre entier positif.The use of a generally elliptical shape cam as shown in FIGS. Figures 2 and 3 is not limiting. It is conceivable to use a cam of different shape or even an eccentric, the rotation frequency F r must then be adapted to the shape of the cam or eccentric chosen. More generally, the frequency F r may be such that F r is equal to F a / n where F a is the routing frequency of the signatures S, and n is a positive integer.

Les figures 4 et 5 montrent une première variante du premier mode de réalisation du dispositif de pliage. Cette variante diffère du dispositif de pliage précédemment décrit par ce qui suit. Dans cette variante, l'arbre 30 unique a été remplacé par deux arbres 64 à came 66 agissant chacun sur l'un des leviers de commande 42. Contrairement aux figures 2 et 3, où la came commune 58 se situe entre les deux leviers de commande 42, ce sont les extrémités 52 des leviers de commande 42 qui se situent entre les deux cames 66. Les deux cames 66 tournent à la même fréquence, c'est-à-dire sont synchronisées, mais en sens inverse, tel qu'indiqué par les flèches H. La figure 4 montre, comme la figure 2, la position basse Pb, tandis que la figure 5 montre, comme la figure 3, la position haute Ph.The Figures 4 and 5 show a first variant of the first embodiment of the folding device. This variant differs from the folding device previously described by the following. In this variant, the single shaft has been replaced by two cam shafts 64 each acting on one of the control levers 42. Figures 2 and 3 where the common cam 58 is between the two control levers 42, it is the ends 52 of the control levers 42 which are located between the two cams 66. The two cams 66 rotate at the same frequency, that is to say are synchronized, but in the opposite direction, as indicated by the arrows H. The figure 4 shows, like the figure 2 , the low position Pb, while the figure 5 shows, like the figure 3 , the high position Ph.

Les figures 6 et 7 illustrent une deuxième variante similaire à celle des figures 4 et 5, à la différence près que l'un des deux arbres 64 est immobilisé. La position basse Pb de la figure 6 est identique à celle de la figure 4. En revanche, telle qu'illustrée à la figure 7, avec un seul arbre 64 en rotation, la courroie supérieure a ne se lève que d'un seul côté selon un angle α par rapport à la table de pliage 4. Ainsi, en position haute Ph, la courroie supérieure a est inclinée par rapport au plan d'acheminement.The Figures 6 and 7 illustrate a second variant similar to that of Figures 4 and 5 with the difference that one of the two shafts 64 is immobilized. The low position Pb of the figure 6 is identical to that of the figure 4 . On the other hand, as illustrated in figure 7 with only one shaft 64 in rotation, the upper belt a only rises on one side at an angle α with respect to the folding table 4. Thus, in the high position Ph, the upper belt a is inclined relative to to the routing plan.

Dans le cas illustré, la courroie est inclinée de telle sorte qu'elle est soulevée d'un côté tête de la signature, donc vers l'aval du sens d'acheminement F.In the case illustrated, the belt is inclined so that it is raised on a head side of the signature, therefore downstream of the direction of routing F.

En variante, dans la position Ph, la courroie est inclinée par rapport à la table 4 de telle sorte qu'elle est soulevée d'un côté queue de la signature, donc vers l'amont du sens d'acheminement F.Alternatively, in the position Ph, the belt is inclined relative to the table 4 so that it is raised on a tail side of the signature, so upstream of the direction of routing F.

Les figures 8 à 10 montrent un deuxième mode de réalisation 3 d'un dispositif de pliage selon l'invention. Ce deuxième mode de réalisation est identique au premier de par ses moyens de déplacement 20 et 22 de deux jeux de courroies supérieures a à d. En revanche, dans ce mode de réalisation, les courroies supérieures qui sont abaissées et relevées de manière cadencée ne sont pas des courroies d'acheminement d'une signature mais des courroies additionnelles statiques de freinage. Les courroies supérieures additionnelles a à d ne sont pas entraînées et sont fixées à leurs extrémités 68 à l'aide de vis 70 aux supports 38, 40. Les courroies supérieures de freinage a à d additionnelles sont logées entre des courroies supérieures e et inférieures δ d'acheminement.The Figures 8 to 10 show a second embodiment 3 of a folding device according to the invention. This second embodiment is identical to the first of its displacement means 20 and 22 of two sets of upper belts a d. In contrast, in this embodiment, the upper belts which are lowered and timed up are not signature conveyor belts but additional static braking belts. The additional upper belts a to d are not driven and are fixed at their ends 68 with screws 70 to the supports 38, 40. The upper braking belts have additional d are housed between upper belts e and lower d routing.

Le deuxième mode de réalisation 3 du dispositif de pliage selon l'invention fonctionne de la manière suivante. En référence à la figure 9, une signature S est acheminée par les courroies d'acheminement e, δ sur la table de pliage 4 dans la direction indiquée par la flèche F. En début d'acheminement, la courroie supérieure de freinage a est dans une position haute Ph et décalée en hauteur par rapport aux courroies d'acheminement e, d'un interstice i de l'ordre de quelques millimètres. Les galets 56 sont en contact avec les sections de surface 62 de la came 58 de manière à ce que les deux leviers de commande 42 soient en position écartée. Pendant que la signature S poursuit son chemin sur la table de pliage 4, dans la direction d'acheminement F, la came 58 continue à tourner jusqu'à atteindre la position illustrée à la figure 10. Dans cette position, les galets 56 qui suivent la surface de came sont en contact avec les sections de surface 60 de la came 58. Ainsi, les leviers de commande 42 pivotent vers le haut et l'un vers l'autre tel qu'indiqué par les flèches J pour atteindre une position rétractée, en abaissant la courroie supérieure de freinage a.The second embodiment 3 of the folding device according to the invention operates as follows. With reference to the figure 9 , a signature S is conveyed by the conveyor belts e, δ on the folding table 4 in the direction indicated by the arrow F. At the beginning of routing, the upper braking belt a is in a high position Ph and shifted height relative to the conveyor belts e, a gap i of the order of a few millimeters. The rollers 56 are in contact with the surface sections 62 of the cam 58 so that the two control levers 42 are in the spaced apart position. As the signature S continues its path on the folding table 4, in the routing direction F, the cam 58 continues to rotate until it reaches the position illustrated in FIG. figure 10 . In this position, the rollers 56 which follow the cam surface are in contact with the surface sections 60 of the cam 58. Thus, the control levers 42 pivot upwards and toward each other as indicated by the arrows J to reach a retracted position, lowering the upper braking belt a.

La fréquence de rotation de l'arbre à came 30 ainsi que sa phase sont réglées de manière à ce que les courroies supérieures de freinage a à d s'abaissent à chaque passage d'une signature S pour la freiner avant que celle-ci ne soit engagée par la lame de pliage 14 dans la fente 24 de la table de pliage 4 puis avalée par les rouleaux de pliage 10, 12. En descendant vers la signature S en mouvement, les courroies supérieures de freinage a à d entrent en contact avec celle-ci afin de la freiner par frottement. Pendant le freinage, la came 58 continue à tourner jusqu'à ce qu'elle atteigne à nouveau la position montrée à la figure 9. Les courroies supérieures de freinage sont relevées, la signature S pliée et le cycle recommence à nouveau. La fréquence Fr de rotation de l'arbre à came 30 est réglée telle que Fr est égale à Fa / n, où Fa est la fréquence d'acheminement des produits à plier, et n est un nombre entier positif.The rotation frequency of the camshaft 30 as well as its phase are adjusted so that the upper braking belts have to lower each time a signature S is passed to slow it down before it passes. is engaged by the folding blade 14 in the slot 24 of the folding table 4 and then swallowed by the folding rollers 10, 12. Down to the signature S in motion, the upper braking belts a to d come into contact with this one to brake it by friction. During braking, the cam 58 continues to rotate until it reaches the position shown in FIG. figure 9 . The upper braking belts are raised, the S signature folded and the cycle starts again. The rotation frequency F r of the camshaft 30 is set such that F r is equal to F a / n, where F a is the routing frequency of the products to be folded, and n is a positive integer.

Les deux modes de réalisation, à savoir un système de soulèvement cadencé de courroies d'acheminement et un système de freinage par abaissement cadencé d'un banc de courroies de freinage, ont été décrits séparément. Toutefois, on peut envisager de combiner ces deux systèmes.The two embodiments, namely a timed belt lift system and a timed lowering braking system of a brake belt bench, have been described separately. However, one can consider combining these two systems.

En outre, les moyens 20, 22 de déplacement cadencé des courroies décrits ci-dessus peuvent aussi se situer entièrement en dessous de la table de pliage. De plus, les principes développés ci-dessus peuvent aussi être appliqués aux courroies d'acheminement inférieures. Ce sont alors les courroies inférieures δ qui sont déplacées de manière cadencée et non plus les courroies supérieures.In addition, the means 20, 22 for moving the belts described above can also be entirely below the folding table. In addition, the principles developed above can also be applied to lower conveyor belts. It is then the lower belts δ which are moved in a clockwise manner and no longer the upper belts.

Les moyens de déplacement 20, 22 peuvent aussi être modifiés pour déplacer un nombre de courroies différent de celui des modes de réalisation décrits. En référence à la figure 1, on pourrait modifier les moyens de déplacement 20, 22 afin de limiter le déplacement cadencé par exemple aux seules courroies a et b. D'autres variantes sont envisageables en fonction de l'application souhaitée.The displacement means 20, 22 can also be modified to move a number of belts different from that of the embodiments described. With reference to the figure 1 the displacement means 20, 22 could be modified in order to limit the displacement, for example, of the only belts a and b. Other variants are possible depending on the desired application.

Bien entendu, les leviers 41, 42 peuvent être actionnés par d'autres moyens que des arbres à came. On pourrait par exemple remplacer les arbres à came par des vérins ou des électroaimants.Of course, the levers 41, 42 can be actuated by means other than camshafts. For example, the camshafts could be replaced by jacks or electromagnets.

Claims (14)

  1. A folding device (2, 3) including:
    - a folding member (14), and
    - at least a first belt (d) adapted to act in a forwarding plane (26) on a product to be folded (S) in order to position it opposite the folding member (14),
    the device including a means (20, 22) for moving the or each first belt (d) relative to the forwarding plane between:
    - a first position (Pb), in which the first belt (d) exerts a first pressure (P1) on the product to be folded (S), and
    - a second position (Ph), in which the first belt (d) exerts a second pressure (P2) on the
    product to be folded (S) that is less than the first pressure (P1),
    the movement means (20, 22) being adapted to make the belt (d) alternate between the first and second positions, characterized in that the folding device comprises at least one second belt (e) that is either a forwarding belt, or a braking belt, and that is not associated with the movement means (20, 22) of the first belts.
  2. The folding device according to claim 1, wherein the forwarding means (20, 22) of the or each first belt comprises, for each first belt:
    - a first guide member (46) around which the first belt (d) is guided;
    - a first mobile support member (41) carrying the first guide member (46); and
    - a first means (30) for timed to-and-fro actuation of the first mobile support member (41), which is adapted to move the first belt (d) between the first (Pb) and second (Ph) positions.
  3. The folding device according to claim 2, wherein the forwarding means (20, 22) of the or each first belt also comprises, for each first belt:
    - a second guide member (46) around which the first belt (d) is guided;
    - a second mobile support member (41) carrying the second guide member (46); and
    - a second means (30; 64) for timed to-and-fro actuation of the second mobile support member (41) that is adapted to move the first belt (d) between the first and second positions.
  4. The folding device according to claim 2 or 3, wherein the or each first, or second if applicable, mobile support member is a pivoting lever (41) having a first end (44), which is an end for positioning the belt relative to the forwarding plane and which carries the associated guide member, and a second end (50) that is pivotably housed.
  5. The folding device according to any one of claims 2 to 4, wherein the means (20, 22) for moving the or each first belt comprises, for each mobile support member, a control lever (42) fixed in rotation to the associated mobile support member (41) and that cooperates with the first or second associated timed actuating means (30; 64).
  6. The folding device according to any one of claims 2 to 5, wherein the or each first or second timed actuating means (30; 64) comprises a cam or eccentric shaft, a jack or an electromagnet, if applicable the timed actuating means acting on the control lever (42).
  7. The folding device according to at least claim 3, wherein each of the first and second mobile support members (41) forms an end (49) of the first belt, the first and second mobile support members (41) are arranged opposite each other, and acting on the associated end (49) of the first belt (d), respectively, so as to allow or create a movement of the belt in a direction (D) perpendicular to the forwarding plane.
  8. The folding device according to at least claim 3, wherein the first and second timed actuating means (30) comprise a shared actuating member, in particular a shared cam.
  9. The folding device according to at least claim 3, wherein the first and second timed actuating means comprise (30) two distinct actuating members, in particular two distinct cams.
  10. The folding device according to any one of the preceding claims, wherein the second position (Ph) is an inclined position of the belt relative to the forwarding plane and the first position (Pb) is a position where the belt is parallel to the forwarding plane.
  11. The folding device according to any one of the preceding claims, also comprising a first additional belt (c) adapted to act in the forwarding plane on the product to be folded (S) in order to position it opposite the folding member (14).
  12. The folding device according to claim 11, wherein the means (20, 22) for moving the first additional belt (c) comprises a synchronization means (36) connecting the first mobile support member of the first additional belt to the first mobile support member of the first belt for a synchronous movement of these two support members for synchronous driving of the first belts between the first and second positions.
  13. The folding device according to any one of the preceding claims, wherein the or each first belt is a driven belt for forwarding the product to be folded, and in which the first position (Pb) is a forwarding position of the product to be folded and the second position (Ph) is a released position of the product to be folded.
  14. The folding device according to any one of claims 1 to 12, wherein the or each first belt is a static belt for braking the product to be folded, and wherein the first position (Pb) is a braking position of the product to be folded and the second position (Ph) is a withdrawn position of the or each belt.
EP10306525.6A 2009-12-29 2010-12-28 Folding device comprising one ore more belts for carrying out an alternating movement between two positions. Not-in-force EP2341026B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0959652A FR2954757B1 (en) 2009-12-29 2009-12-29 FOLDING DEVICE COMPRISING ONE OR MORE BELTS CAPABLE OF PERFORMING A CADENCE MOVEMENT BETWEEN TWO POSITIONS

Publications (2)

Publication Number Publication Date
EP2341026A1 EP2341026A1 (en) 2011-07-06
EP2341026B1 true EP2341026B1 (en) 2013-11-27

Family

ID=42340714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10306525.6A Not-in-force EP2341026B1 (en) 2009-12-29 2010-12-28 Folding device comprising one ore more belts for carrying out an alternating movement between two positions.

Country Status (5)

Country Link
US (1) US20110212816A1 (en)
EP (1) EP2341026B1 (en)
JP (1) JP2011136841A (en)
CN (1) CN102180377A (en)
FR (1) FR2954757B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109928259B (en) * 2019-02-28 2020-07-28 亿信医疗器械股份有限公司 Continuous folding device of multilayer gauze piece

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US3507489A (en) * 1966-09-06 1970-04-21 Masson Scott Thrissell Eng Ltd Sheet feeding apparatus
US4281828A (en) * 1978-03-30 1981-08-04 Union Carbide Corporation Plastic bag handling system
FR2546818B1 (en) * 1983-06-06 1987-03-20 Marinoni Harris Sa DEVICE FOR SLOWING DOWN COPIES IN A FOLDING SQUARE FOLDER USED IN CONNECTION WITH ROTATING PRESSES
FR2563773B1 (en) * 1984-05-07 1986-12-05 Marinoni Harris Sa DEVICE FOR AUTOMATICALLY ADJUSTING THE SLOWDOWN OF THE NOTEBOOK BEFORE FOLDING IN THE FOLDERS OF THE PRESS FOLDER SQUARES
JPH052514Y2 (en) * 1985-11-20 1993-01-21
FR2672544B1 (en) * 1991-02-08 1995-10-06 Marinoni Harris Sa FOLDER OF PRINTING MACHINE WITH DEVICE FOR SLOWING COPIES SENT IN A SQUARE FOLDER OF SAID FOLDER.
GB2255551B (en) * 1991-05-10 1995-01-18 Frankenthal Ag Albert Feeding signatures to a reciprocating blade folder
JPH06115805A (en) * 1992-10-09 1994-04-26 Kao Corp Bending device for soft object
GB2281069B (en) * 1993-08-17 1997-04-23 Rockwell Pmc Limited Folding apparatus
JP2868691B2 (en) * 1993-08-25 1999-03-10 シャープ株式会社 Sheet post-processing equipment
JP2786617B2 (en) * 1996-05-16 1998-08-13 三菱重工業株式会社 Conveyor for folding machine sheets
JPH115668A (en) * 1997-06-13 1999-01-12 Komori Corp Chopper unit
JP3891665B2 (en) * 1997-10-15 2007-03-14 三菱重工業株式会社 Sheet folding machine
JP3835933B2 (en) * 1998-02-27 2006-10-18 三菱重工業株式会社 Folding machine signature transport device
JP2002174862A (en) * 2000-12-07 2002-06-21 Fuji Photo Film Co Ltd Image forming device
JP3692322B2 (en) * 2000-12-25 2005-09-07 三菱重工業株式会社 Eclectic conveyor
DE102004023318B4 (en) * 2004-05-07 2008-04-17 Man Roland Druckmaschinen Ag Folding device for printing presses or folders

Also Published As

Publication number Publication date
FR2954757B1 (en) 2012-04-27
US20110212816A1 (en) 2011-09-01
CN102180377A (en) 2011-09-14
EP2341026A1 (en) 2011-07-06
JP2011136841A (en) 2011-07-14
FR2954757A1 (en) 2011-07-01

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