EP0198777A1 - Automatic folding-machine for tanned skins - Google Patents

Automatic folding-machine for tanned skins Download PDF

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Publication number
EP0198777A1
EP0198777A1 EP86420097A EP86420097A EP0198777A1 EP 0198777 A1 EP0198777 A1 EP 0198777A1 EP 86420097 A EP86420097 A EP 86420097A EP 86420097 A EP86420097 A EP 86420097A EP 0198777 A1 EP0198777 A1 EP 0198777A1
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EP
European Patent Office
Prior art keywords
flaps
skins
machine according
vertical position
folded
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.)
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EP86420097A
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German (de)
French (fr)
Inventor
Claude Farez
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CHARVO SA
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CHARVO SA
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    • CCHEMISTRY; METALLURGY
    • C14SKINS; HIDES; PELTS; LEATHER
    • C14BMECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00Manufacture of leather; Machines or devices therefor
    • C14B1/62Winding or stacking hides or leather

Definitions

  • the present invention mainly intends to remedy, and this using a simple and perfectly reliable machine, allowing fully automatic operation.
  • the machine according to the invention is mainly remarkable in that it firstly comprises an opening hatch device, the plate of which is formed by two tilting flaps arranged side by side with their pivot axis located at the outer edge, the edges adjacent free of these flaps being coupled to each other by two lateral hinge mechanisms. Furthermore, at least one of the flaps is associated with actuation means, for example in the form of a pneumatic cylinder, capable of moving the flap under consideration in the direction of the other kept fixed, so as to cause the opening of the hatch by progressive tilting of the two flaps to the vertical position.
  • actuation means for example in the form of a pneumatic cylinder
  • the machine shown in fig. 1 comprises a lower frame which is supposed to be constituted by two longitudinal members 1 connected to one another by two upper crosspieces 2. On these are fixed two profiles 3 with a C-shaped cross section, suitable for forming paths bearing for four rollers referenced 4 and 5.
  • the two rollers 4 are mounted idly on ends of the axle reported at the two ends of a reinforcement 6 oriented parallel to the crosspieces 2 mentioned above and welded against the underside of a flap tilting 7.
  • the arrangement is identical for the two rollers 5 carried by a reinforcement 8 fixed against the underside of a tilting flap 9, identical to the flap 7 mentioned above.
  • the two tilting flaps 7 and 9 are arranged side by side so as to form a sort of horizontal plate.
  • the reinforcements 6 and 8 which carry the rollers 4 and 5 are located in the vicinity of the outer edge of each flap 7, respectively 9, so that the assembly constitutes an opening hatch device with two flaps. It should however be observed that the two inner edges of the flaps 7 and 9 are coupled to each other by two lateral hinge mechanisms referenced 10, which maintain said edges at a certain distance from one another.
  • the hatch device thus arranged are associated with actuating means comprising two pneumatic cylinders 11 and 12, the body of which is fixed to the corresponding cross member 2 of the frame 1-2, while the end of the movable member of the piston is rendered integral with the reinforcement 6, respectively 8, of the flap 7 or 9 envisaged.
  • actuating means comprising two pneumatic cylinders 11 and 12, the body of which is fixed to the corresponding cross member 2 of the frame 1-2, while the end of the movable member of the piston is rendered integral with the reinforcement 6, respectively 8, of the flap 7 or 9 envisaged.
  • each of these cylinders 11 and 12 is connected to a source of compressed air through a system of valves not shown, suitable for ensuring the appropriate control of said cylinders.
  • the hatch device is shown in the closed position with the two flaps 7 and 9 in the horizontal top position.
  • a stack of skins A has been deposited, taking care that the median axis of said stack A coincides with the space formed between said flaps.
  • a packing box B which was supposed to be supported by an elevator C.
  • FIG. 3 shows that this movement of the flap 7 causes the opening of the hatch device: following the immobilization of the flap 9 in translation and as a result of the articulated connection operated by the hinge mechanisms 10, the two flaps 7 and 9 tilt down causing progressive folding of the stack A that they support.
  • the stack A When the two flaps 7 and 9 arrive at the end of their travel in the vertical orientation (stops 13 being advantageously provided on one of the flaps to limit the travel), being placed against one of the vertical walls of the body B, the stack A, then in the fully folded state, can slide vertically through the lower free space provided by the hinge mechanisms 10 (fig. 4) and bear against the bottom of said box.
  • the jack 12 is then supplied at the same time as the jack 11 is connected to the atmosphere, which has the effect (fig. 5) of pushing the flaps 7 and 9 towards the opposite vertical wall of the body and d 'thus spread the folded stack A against the bottom thereof.
  • the two jacks 11 and 12 are then controlled by contraction to return the device to the initial position of FIG. 4.
  • the plate formed by the two flaps 7 and 9 in the high horizontal position can receive a new stack A 'of skins to be folded and the cycle can then start again. It will however be observed (FIG. 7) that it is the jack 12 which will be controlled this time, the jack 11 remaining in the contracted position; the same folding process is carried out, but the fold is formed in the box B opposite the fold of the stack A.
  • the elevator C is controlled to descend as the body B is filled.
  • each hinge mechanism 10 is constituted by a simple link articulated at each of its ends, but it is obviously possible to have recourse to more sophisticated arrangements, allowing in particular the adjustment of the width of the free space provided between the adjacent edges of the two flaps 7 and 9.
  • hinge mechanisms 10 must be adjusted very precisely as a function of the thickness of the stacks of skins A to be folded, so that these do not slide vertically through the space free that said mechanisms spare, that at the exact moment when the flaps 7 and 9 arrive at the vertical position according to fig. 4.
  • a stack A must not fall too early (because the fold would not be placed against the vertical wall of the box B), nor should it remain applied against one of the two aforementioned flaps.
  • each of the hinge mechanisms was formed by a link 101, one end of which is coupled to a pivot of the flap 9 while the opposite end is cut out from a longitudinal slot 101a inside which can move a stud 101b integral with the flap 7. It is understood that when the cylinder 11 pushes the flap 7 along the arrow of fig. 7 to bring the two flaps vertically according to fig. 4, the lower opening provided by the mechanisms 101 has a reduced section which prevents any fall of the folded stack A. Once this vertical position has been reached, the jack 11 is actuated in the opposite direction (fig. 8), so that the stud 101b slides in the light 101a, thus allowing the two flaps 7 and 9 to move apart. on the other, which increases the section of the lower opening and promotes the passage of stack A.
  • each hinge mechanism comprises a small pneumatic cylinder 103 of the double-acting type, the body and the movable member of which are coupled to the flap 7, respectively to the flap 9, said cylinder being supplied to operate the spacing of the lower part of said flaps once these brought to the vertical position according to FIG. 4.
  • the flaps 7 and 9 are coupled to each other by hinge mechanisms 10 identical to those used in the embodiment according to FIG. 1 and 6; however one of these flaps, namely that referenced 7 in the embodiment considered, is provided with at least one pneumatic box 104 associated with a deformable membrane 104a, which in the inflated position constitutes a kind of elastically applied plunger against stacking A folded between the flaps. This stack A is thus retained in place until the box 104 is decompressed and allows retraction of the membrane 104a.
  • the system 104-104a is replaced by a pneumatic cylinder 105, the cylinder of which is carried by the flap 7, while its movable member is provided with a plate 105a, guided so as to play a role of pusher identical to that of the membrane 104a.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

The skins to be folded (A) are deposited on the upper face of a trap consisting of two shutters (7, 9) which are controlled by actuating means (11, 12) in order to tilt downwards while performing the folding of the said skins. When folding is completed, the latter are removed downwards through the free space provided by the hinges (10) which connect the adjacent edges of the two shutters (7, 9). <IMAGE>

Description

On sait que dans l'industrie de la tannerie, et de manière plus précise dans le domaine de la mégisserie qui traite des peaux très souples présentant des dimensions relativement réduites, les articles traités sont empilés à l'état replié à l'intérieur de caisses en carton destinées à assurer leur transport et leur stockage.It is known that in the tanning industry, and more precisely in the field of tanning which treats very flexible hides having relatively small dimensions, the treated articles are stacked in the folded state inside boxes in cardboard intended to ensure their transport and their storage.

Le pliage et la mise en place de ces peaux impliquent à l'heure actuelle des appareillages complexes et coûteux, comportant un nombre élevé de pièces mobiles placées sous la dépendance de palpeurs propres à détecter la position des bords des peaux, les dimensions de celles-ci variant dans une mesure considérable.The folding and positioning of these skins currently involves complex and costly equipment, comprising a large number of moving parts placed under the dependence of feelers capable of detecting the position of the edges of the skins, the dimensions of these these varying to a considerable extent.

C'est à ces inconvénients que la présente invention entend principalement remédier, et ce à l'aide d'une machine simple et parfaitement fiable, autorisant un fonctionnement entièrement automatique.It is these drawbacks that the present invention mainly intends to remedy, and this using a simple and perfectly reliable machine, allowing fully automatic operation.

La machine suivant l'invention est principalement remarquable en ce qu'elle comprend en premier lieu un dispositif de trappe ouvrante dont le plateau est formé par deux volets basculants disposés côte à côte avec leur axe de pivotement situé au niveau du bord extérieur, les bords libres adjacents de ces volets étant attelés l'un à l'autre par deux mécanismes latéraux de charnières. Par ailleurs, à l'un au moins des volets sont associés des moyens d'actionnement, par exemple sous la forme d'un vérin pneumatique, aptes à déplacer le volet considéré en direction de l'autre maintenu fixe, de façon à provoquer l'ouverture de la trappe par basculement progressif des deux volets jusqu'à la position verticale.The machine according to the invention is mainly remarkable in that it firstly comprises an opening hatch device, the plate of which is formed by two tilting flaps arranged side by side with their pivot axis located at the outer edge, the edges adjacent free of these flaps being coupled to each other by two lateral hinge mechanisms. Furthermore, at least one of the flaps is associated with actuation means, for example in the form of a pneumatic cylinder, capable of moving the flap under consideration in the direction of the other kept fixed, so as to cause the opening of the hatch by progressive tilting of the two flaps to the vertical position.

On conçoit dans ces conditions que pour procéder au pliage simultané d'une série de peaux empilées, il suffit de déposer l'empilage sur le plateau formé par les deux volets en position haute horizontale, en prenant simplement soin que l'axe médian dudit empilage coïncide avec le plan de jonction desdits votets. La manoeuvre des moyens d'actionnement de la machine assure alors le repliage progressif de l'empilage, le pli ainsi formé se déplaçant en direction de l'axe de pivotement du volet fixe en même temps que vers le bas, à l'intérieur d'une caisse disposée immédiatement au-dessous du dispositif de trappe. Lorsque ces volets atteignent la position verticale, l'empilage plié traverse l'espace libre médian ménagé entre lesdits volets par les mécanismes de charnières, et tombe dans la caisse avec le pli disposé contre l'une des parois verticales de celle-ci.It is understood under these conditions that to proceed to the simultaneous folding of a series of stacked skins, it suffices to deposit the stack on the plate formed by the two flaps in the high horizontal position, simply taking care that the median axis of said stack coincides with the junction plane of said votes. The operation of the actuating means of the machine then ensures the progressive folding of the stack, the fold thus formed moving in the direction of the pivot axis of the fixed flap at the same time as downward, inside d '' a box placed immediately below the hatch device. When these flaps reach the vertical position, the folded stack passes through the median free space formed between said flaps by the hinge mechanisms, and falls into the box with the fold disposed against one of the vertical walls thereof.

On a évidemment intérêt, pour l'obtention de caisses convenablement remplies, à inverser alternativement la position du pli de repliage le long des deux parois verticales opposées desdites caisses. Aussi associe-t-on à chacun des deux volets du dispositif de trappe des moyens d'actionnement qui sont mis en oeuvre alternativement.It is obviously advantageous, for obtaining suitably filled boxes, to alternately reverse the position of the folding fold along the two opposite vertical walls of said boxes. So we associate with each of the two components of the hatch actuating means which are implemented alternately.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :

  • Fig. 1 est une vue en perspective montrant l'agencement général d'une machine de pliage établie conformément à l'invention.
  • Fig. 2 à 6 illustrent schématiquement le fonctionnement de cette machine.
  • Fig. 7 à 15 sont des schémas correspondant à une série de variantes dans lesquelles la libération des empilages de peaux est facilitée lorsque les volets atteignent l'orientation verticale.
The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:
  • Fig. 1 is a perspective view showing the general arrangement of a folding machine established in accordance with the invention.
  • Fig. 2 to 6 schematically illustrate the operation of this machine.
  • Fig. 7 to 15 are diagrams corresponding to a series of variants in which the release of the stacks of skins is facilitated when the flaps reach the vertical orientation.

La machine représentée en fig. 1 comprend un bâti inférieur qu'on a supposé être constitué par deux longerons 1 reliés l'un à l'autre par deux traverses supérieures 2. Sur ces dernières sont fixés deux profilés 3 à section transversale en forme de C, aptes à former chemins de roulement pour quatre galets référencés 4 et 5. Les deux galets 4 sont montés fous sur des bouts d'axe rapportés aux deux extrémités d'un renfort 6 orienté parallèlement aux traverses 2 sus-mentionnées et soudé contre la face inférieure d'un volet basculant 7. L'agencement est identique pour les deux galets 5 portés par un renfort 8 fixé contre la face inférieure d'un volet basculant 9, identique au volet 7 sus-mentionné.The machine shown in fig. 1 comprises a lower frame which is supposed to be constituted by two longitudinal members 1 connected to one another by two upper crosspieces 2. On these are fixed two profiles 3 with a C-shaped cross section, suitable for forming paths bearing for four rollers referenced 4 and 5. The two rollers 4 are mounted idly on ends of the axle reported at the two ends of a reinforcement 6 oriented parallel to the crosspieces 2 mentioned above and welded against the underside of a flap tilting 7. The arrangement is identical for the two rollers 5 carried by a reinforcement 8 fixed against the underside of a tilting flap 9, identical to the flap 7 mentioned above.

Les deux volets basculants 7 et 9 sont disposés côte à côte de façon à former une sorte de plateau horizontal. Les renforts 6 et 8 qui portent les galets 4 et 5 sont situés au voisinage du bord extérieur de chaque volet 7, respectivement 9, de telle sorte que l'ensemble constitue un dispositif de trappe ouvrante à deux volets. Il convient toutefois d'observer que les deux bords intérieurs des volets 7 et 9 sont attelés l'un à l'autre par deux mécanismes latéraux de charnières référencés 10, qui maintiennent lesdits bords à un certain écartement l'un de l'autre.The two tilting flaps 7 and 9 are arranged side by side so as to form a sort of horizontal plate. The reinforcements 6 and 8 which carry the rollers 4 and 5 are located in the vicinity of the outer edge of each flap 7, respectively 9, so that the assembly constitutes an opening hatch device with two flaps. It should however be observed that the two inner edges of the flaps 7 and 9 are coupled to each other by two lateral hinge mechanisms referenced 10, which maintain said edges at a certain distance from one another.

Au dispositif de trappe ainsi agencé sont associés des moyens d'actionnement comprenant deux vérins pneumatiques 11 et 12 dont le corps est fixé à la traverse correspondante 2 du bâti 1-2, tandis que l'extrémité de l'organe mobile du piston est rendue solidaire du renfort 6, respectivement 8, du volet 7 ou 9 envisagé. Bien évidemment chacun de ces vérins 11 et 12 est relié à une source d'air comprimé à travers un système de vannes non représenté, propre à assurer la commande appropriée desdits vérins.The hatch device thus arranged are associated with actuating means comprising two pneumatic cylinders 11 and 12, the body of which is fixed to the corresponding cross member 2 of the frame 1-2, while the end of the movable member of the piston is rendered integral with the reinforcement 6, respectively 8, of the flap 7 or 9 envisaged. Obviously each of these cylinders 11 and 12 is connected to a source of compressed air through a system of valves not shown, suitable for ensuring the appropriate control of said cylinders.

Le fonctionnement de la machine de pliage ci- dessus décrite sera exposé en référence aux fig. 2 à 6.The operation of the above-described folding machine will be explained with reference to FIGS. 2 to 6.

En fig. 2, le dispositif de trappe est représenté à la position fermée avec les deux volets 7 et 9 en position haute horizontale. Sur le plateau ainsi formé par les volets, on a déposé un empilage de peaux A, en prenant soin que l'axe médian dudit empilage A coïncide avec l'espace ménagé entre lesdits volets. Au-dessous du dispositif de trappe est disposée une caisse d'emballage B qu'on a supposé être supportée par un élévateur C.In fig. 2, the hatch device is shown in the closed position with the two flaps 7 and 9 in the horizontal top position. On the tray thus formed by the flaps, a stack of skins A has been deposited, taking care that the median axis of said stack A coincides with the space formed between said flaps. Below the hatch device is disposed a packing box B which was supposed to be supported by an elevator C.

A ce moment, le vérin 11 est alimenté en air comprimé alors que le vérin 12 reste en fin de course rétractée. Dans ces conditions, l'organe mobile du vérin 11 repousse le volet 7 en direction du volet 9, les galets 4 circulant à l'intérieur des profilés ou glissières 3. Fig. 3 montre bien que ce déplacement du volet 7 provoque l'ouverture du dispositif de trappe : par suite de l'immobilisation du volet 9 en translation et par suite de la liaison articulée opérée par les mécanismes de charnières 10, les deux volets 7 et 9 basculent vers le bas en provoquant le pliage progressif de l'empilage A qu'ils supportent.At this moment, the jack 11 is supplied with compressed air while the jack 12 remains retracted at the end of the stroke. Under these conditions, the movable member of the jack 11 pushes the shutter 7 towards the shutter 9, the rollers 4 circulating inside the profiles or slides 3. FIG. 3 shows that this movement of the flap 7 causes the opening of the hatch device: following the immobilization of the flap 9 in translation and as a result of the articulated connection operated by the hinge mechanisms 10, the two flaps 7 and 9 tilt down causing progressive folding of the stack A that they support.

Lorsque les deux volets 7 et 9 arrivent en fin de course à l'orientation verticale (des butées 13 étant avantageusement prévues sur l'un des volets pour limiter la course), en se trouvant disposés contre l'une des parois verticales de la caisse B, l'empilage A, alors à l'état complètement replié, peut glisser verticalement à travers l'espace libre inférieur ménagé par les mécanismes de charnière 10 (fig. 4) et prendre appui contre le fond de ladite caisse. On alimente alors le vérin 12 en même temps qu'on relie le vérin 11 à l'atmosphère, ce qui a pour effet (fig. 5) de repousser les volets 7 et 9 en direction de la paroi verticale opposée de la caisse et d'étaler ainsi l'empilage plié A contre le fond de celle-ci.When the two flaps 7 and 9 arrive at the end of their travel in the vertical orientation (stops 13 being advantageously provided on one of the flaps to limit the travel), being placed against one of the vertical walls of the body B, the stack A, then in the fully folded state, can slide vertically through the lower free space provided by the hinge mechanisms 10 (fig. 4) and bear against the bottom of said box. The jack 12 is then supplied at the same time as the jack 11 is connected to the atmosphere, which has the effect (fig. 5) of pushing the flaps 7 and 9 towards the opposite vertical wall of the body and d 'thus spread the folded stack A against the bottom thereof.

Les deux vérins 11 et 12 sont ensuite commandés à la contraction pour ramener le dispositif à la position initiale de fig. 4. Le plateau formé par les deux volets 7 et 9 en position haute horizontale peut recevoir un nouvel empilage A' de peaux à replier et le cycle peut alors recommencer. On observera cependant (fig. 7) que c'est le vérin 12 qui va être cette fois commandé, le vérin 11 restant à la position contractée ; le même processus de pliage est réalisé, mais le pli est formé dans la caisse B à l'opposé du pli de l'empilage A.The two jacks 11 and 12 are then controlled by contraction to return the device to the initial position of FIG. 4. The plate formed by the two flaps 7 and 9 in the high horizontal position can receive a new stack A 'of skins to be folded and the cycle can then start again. It will however be observed (FIG. 7) that it is the jack 12 which will be controlled this time, the jack 11 remaining in the contracted position; the same folding process is carried out, but the fold is formed in the box B opposite the fold of the stack A.

On peut ainsi alterner la position des plis à l'intérieur de la caisse d'emballage, afin de réaliser dans celle-ci un empillage parfait. Bien évidemment, l'élévateur C est commandé à la descente au fur et à mesure du remplissage de la caisse B.It is thus possible to alternate the position of the folds inside the packing box, in order to achieve perfect stacking therein. Obviously, the elevator C is controlled to descend as the body B is filled.

Dans la forme de réalisation envisagée, on a supposé que chaque mécanisme de charnière 10 était constitué par une simple biellette articulée à chacune de ses extrémités, mais on peut bien évidemment avoir recours à des agencements plus sophistiqués, permettant notamment le réglage de la largeur de l'espace libre ménagé entre les bords adjacents des deux volets 7 et 9.In the embodiment envisaged, it has been assumed that each hinge mechanism 10 is constituted by a simple link articulated at each of its ends, but it is obviously possible to have recourse to more sophisticated arrangements, allowing in particular the adjustment of the width of the free space provided between the adjacent edges of the two flaps 7 and 9.

Il convient en effet d'observer que les mécanismes de charnières 10 doivent être réglés de manière très précise en fonction de l'épaisseur des empilages de peaux A à plier, de façon à ce que ceux-ci ne glissent verticalement à travers l'espace libre que lesdits mécanismes ménagent, qu'au moment exact où les volets 7 et 9 arrivent à la position verticale suivant fig. 4. Effectivement, il ne faut pas qu'un empilage A tombe trop tôt (car le pli ne serait pas disposé contre la paroi verticale de la caisse B), ni qu'il reste appliqué contre l'un des deux volets précités.It should indeed be observed that the hinge mechanisms 10 must be adjusted very precisely as a function of the thickness of the stacks of skins A to be folded, so that these do not slide vertically through the space free that said mechanisms spare, that at the exact moment when the flaps 7 and 9 arrive at the vertical position according to fig. 4. In fact, a stack A must not fall too early (because the fold would not be placed against the vertical wall of the box B), nor should it remain applied against one of the two aforementioned flaps.

Pour obtenir la libération précise des empilage A, on peut avantageusement avoir recours à l'une des variantes illustrées en fig. 7 à 15.To obtain the precise release of the stack A, it is advantageous to have recourse to one of the variants illustrated in FIG. 7 to 15.

En fig. 7 et 8, on a supposé que chacun des mécanismes de charnières était formé par une biellette 101 dont une extrémité est attelée sur un pivot du volet 9 tandis que l'extrémité opposée est découpée d'une lumière longitudinale 101a à l'intérieur de laquelle peut se déplacer un goujon 101b solidaire du volet 7. On comprend que lorsque le vérin 11 repousse le volet 7 suivant la flèche de fig. 7 pour amener les deux volets à la verticale suivant fig. 4, l'ouverture inférieure ménagée par les mécanismes 101 présente une section réduite qui s'oppose à toute chute de l'empilage A replié. Une fois cette position verticale atteinte, le vérin 11 est actionné en sens inverse (fig. 8), de telle sorte que le goujon 101b coulisse dans la lumière 101a, en permettant ainsi aux deux volets 7 et 9 de s'écarter l'un de l'autre, ce qui augmente la section de l'ouverture inférieure et favorise le passage de l'empilage A.In fig. 7 and 8, it was assumed that each of the hinge mechanisms was formed by a link 101, one end of which is coupled to a pivot of the flap 9 while the opposite end is cut out from a longitudinal slot 101a inside which can move a stud 101b integral with the flap 7. It is understood that when the cylinder 11 pushes the flap 7 along the arrow of fig. 7 to bring the two flaps vertically according to fig. 4, the lower opening provided by the mechanisms 101 has a reduced section which prevents any fall of the folded stack A. Once this vertical position has been reached, the jack 11 is actuated in the opposite direction (fig. 8), so that the stud 101b slides in the light 101a, thus allowing the two flaps 7 and 9 to move apart. on the other, which increases the section of the lower opening and promotes the passage of stack A.

Un résultat tout à fait équivalent peut être obtenu à l'aide du mécanisme de charnière illustré en fig. 9 et 10, constitué par deux biellettes 102 articulées l'une de l'autre à la manière d'un compas. En fig. 11 et 12, chaque mécanisme de charnière comprend un petit vérin pneumatique 103 du type à double effet, dont le corps et l'organe mobile sont attelés au volet 7, respectivement au volet 9, ledit vérin étant alimenté pour opérer l'écartement de la partie inférieure desdits volets une fois ceux-ci amenés à la position verticale suivant fig. 4.A completely equivalent result can be obtained using the hinge mechanism illustrated in fig. 9 and 10, constituted by two rods 102 articulated one from the other in the manner of a compass. In fig. 11 and 12, each hinge mechanism comprises a small pneumatic cylinder 103 of the double-acting type, the body and the movable member of which are coupled to the flap 7, respectively to the flap 9, said cylinder being supplied to operate the spacing of the lower part of said flaps once these brought to the vertical position according to FIG. 4.

En fig. 13 et 14, les volets 7 et 9 sont attelés l'un à l'autre par des mécanismes de charnières 10 identiques à ceux utilisés dans la forme de réalisation suivant fig. 1 et 6 ; toutefois l'un de ces volets, à savoir celui référencé 7 dans l'exemple de réalisation considéré, est pourvu d'au moins un caisson pneumatique 104 associé à une membrane déformable 104a, qui à la position gonflée constitue une sorte de poussoir élastiquement appliqué contre l'empilage A replié entre les volets. Cet empilage A est ainsi retenu en place jusqu'à ce que le caisson 104 soit décompressé et permette l'escamotage de la membrane 104a.In fig. 13 and 14, the flaps 7 and 9 are coupled to each other by hinge mechanisms 10 identical to those used in the embodiment according to FIG. 1 and 6; however one of these flaps, namely that referenced 7 in the embodiment considered, is provided with at least one pneumatic box 104 associated with a deformable membrane 104a, which in the inflated position constitutes a kind of elastically applied plunger against stacking A folded between the flaps. This stack A is thus retained in place until the box 104 is decompressed and allows retraction of the membrane 104a.

Dans la variante suivant fig. 15, le système 104-104a est remplacé par un vérin pneumatique 105 dont le cylindre est porté par le volet 7, tandis que son organe mobile est muni d'un plateau 105a , guidé de façon à jouer un rôle de poussoir identique à celui de la membrane 104a.In the variant according to fig. 15, the system 104-104a is replaced by a pneumatic cylinder 105, the cylinder of which is carried by the flap 7, while its movable member is provided with a plate 105a, guided so as to play a role of pusher identical to that of the membrane 104a.

Claims (9)

1. Machine pour le pliage automatique des peaux tannées, caractérisée en ce qu'elle comprend d'une part un dispositif de trappe formé par deux volets basculants (7, 9) articulés au voisinage de leur bord extérieur et attelés l'un à l'autre par leurs bords adjacents, et d'autre part des moyens d'actionnement (11, 12) associés à l'un au moins desdits volets en vue de la déplacer en direction de l'autre maintenu fixe, de façon à provoquer l'ouverture de la trappe par basculement progressif des deux volets jusqu'à la position verticale et le pliage des peaux initialement placées sur ces volets, les peaux ainsi repliées s'échappant verticalement à travers l'espace libre médian ménagé entre les volets amenés à la position verticale.1. Machine for the automatic folding of tanned hides, characterized in that it comprises on the one hand a hatch device formed by two tilting flaps (7, 9) articulated in the vicinity of their outer edge and coupled one to the other. 'other by their adjacent edges, and on the other hand actuating means (11, 12) associated with at least one of said flaps in order to move it towards the other kept fixed, so as to cause l opening of the hatch by progressive tilting of the two flaps to the vertical position and folding of the skins initially placed on these flaps, the skins thus folded escaping vertically through the median free space formed between the flaps brought to the vertical position. 2. Machine suivant la revendication 1, caractérisée en ce qu'à chacun des deux voiets (7, 9) sont associés des moyens de commande (11, 12) de façon d'une part à assurer l'étalement correct des peaux pliées moyennant déplacement des deux volets (7, 9) amenés à la position verticale, d'autre part l'alternance des plis des peaux sur chacun des deux bords opposés de l'empilage réalisé.2. Machine according to claim 1, characterized in that each of the two louvers (7, 9) are associated with control means (11, 12) so as to ensure correct spreading of the folded skins on the one hand displacement of the two flaps (7, 9) brought to the vertical position, on the other hand the alternation of the folds of the skins on each of the two opposite edges of the stack produced. 3. Machine suivant la revendication 2, caractérisée en ce qu'elle comprend deux profilés parallèles (3) à section transversale en forme de C à l'intérieur desquels sont guidés des galets (4, 5) portés par les bords latéraux des volets (7, 9).3. Machine according to claim 2, characterized in that it comprises two parallel sections (3) with a C-shaped cross section inside which rollers are guided (4, 5) carried by the lateral edges of the flaps ( 7, 9). 4. Machine suivant l'une quelconque des revendications 2 et 3, caractérisée en ce que les moyens de commande sont constitués par deux vérins pneumatiques (11, 12) dont le corps est fixé contre le bâti (1-2) de la machine tandis que l'organe mobile est rendu solidaire d'un renfort (6, 8) rapporté contre la face inférieure des volets (7, 9).4. Machine according to any one of claims 2 and 3, characterized in that the control means consist of two pneumatic cylinders (11, 12) whose body is fixed against the frame (1-2) of the machine while that the movable member is made integral with a reinforcement (6, 8) attached against the underside of the flaps (7, 9). 5. Machine suivant l'une quelconque des revendications qui précédent, caractérisée en ce que les bords adjacents des volets (7, 9) sont attelés l'un à l'autre par des mécanismes latéraux de charnières (10, 101, 102, 103) agencés pour ménager t'espace libre médian formant passage pour les peaux une fois lesdits volets amenés à la position verticale.5. Machine according to any one of the preceding claims, characterized in that the adjacent edges of the flaps (7, 9) are coupled to one another by lateral hinge mechanisms (10, 101, 102, 103 ) arranged to provide the median free space forming a passage for the skins once said flaps brought to the vertical position. 6. Machine suivant la revendication 5, caractérisée en ce que les mécanismes de charnières (101, 102, 103) ménagent un espace libre médian de section variable afin de ne libérer les peaux repliées qu'après que les volets (7, 9) aient atteint la position verticale.6. Machine according to claim 5, characterized in that the hinge mechanisms (101, 102, 103) provide a median free space of variable section so as to release the folded skins only after the flaps (7, 9) have reaches the vertical position. 7. Machine suivant la revendication 5, caractérisée en ce que l'un au moins des volets (7, 9) est équipé d'au moins un poussoir (104a, 105a) qui est commandé de façon à retenir les peaux repliées par pression contre le volet opposé.7. Machine according to claim 5, characterized in that at least one of the flaps (7, 9) is equipped with at least one pusher (104a, 105a) which is controlled so as to retain the folded skins by pressure against the opposite flap. 8. Machine suivant la revendication 7, caractérisée en ce que chaque poussoir est constitué par une membrane déformable (104a) associée à un caisson pneumatique (104) fixé contre l'un des volets - (7.9).8. Machine according to claim 7, characterized in that each pusher is constituted by a deformable membrane (104a) associated with a pneumatic box (104) fixed against one of the flaps - (7.9). 9. Machine suivant la revendication 7, caractérisée en ce que chaque poussoir est formé par un plateau (105a) associé à un vérin pneumatique de commande (105).9. Machine according to claim 7, characterized in that each pusher is formed by a plate (105a) associated with a pneumatic control cylinder (105).
EP86420097A 1985-04-09 1986-04-04 Automatic folding-machine for tanned skins Ceased EP0198777A1 (en)

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FR8505500A FR2579995B1 (en) 1985-04-09 1985-04-09
FR8505500 1985-04-09

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050409A (en) * 1988-11-07 1991-09-24 Roger Allamanche Method and apparatus for handling skins or hides
EP1076101A2 (en) * 1999-08-10 2001-02-14 Ger Elettronica S.R.L. Method and device for folding piles of sheets
FR2850670A1 (en) * 2003-02-04 2004-08-06 Ct Tech Cuir Chaussure Maroqui Untanned hide folding machine comprises series of conveyors that tilt about transverse axes and one that folds in lengthwise sections
US8091390B2 (en) 2006-08-16 2012-01-10 Cargill, Incorporated Hide folding system and method
ITVI20110131A1 (en) * 2011-05-23 2012-11-24 Feltre Srl PLANT FOR BENDING FLEXIBLE LAMINAR ELEMENTS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113481331A (en) * 2021-08-13 2021-10-08 马艳文 Leather conditioning and folding method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686673A (en) * 1949-07-07 1954-08-17 United Shoe Machinery Corp Automatic stacking device
FR1295214A (en) * 1960-07-19 1962-06-01 Classification device for leather and the like
GB2058002A (en) * 1979-09-04 1981-04-08 Cks Snc Apparatus for folding tubular garment pieces
FR2471343A1 (en) * 1979-12-14 1981-06-19 Valton Sa Folding machine for textiles - inserts precise single folds into cut fabric pieces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686673A (en) * 1949-07-07 1954-08-17 United Shoe Machinery Corp Automatic stacking device
FR1295214A (en) * 1960-07-19 1962-06-01 Classification device for leather and the like
GB2058002A (en) * 1979-09-04 1981-04-08 Cks Snc Apparatus for folding tubular garment pieces
FR2471343A1 (en) * 1979-12-14 1981-06-19 Valton Sa Folding machine for textiles - inserts precise single folds into cut fabric pieces

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050409A (en) * 1988-11-07 1991-09-24 Roger Allamanche Method and apparatus for handling skins or hides
EP1076101A2 (en) * 1999-08-10 2001-02-14 Ger Elettronica S.R.L. Method and device for folding piles of sheets
EP1076101A3 (en) * 1999-08-10 2001-06-13 Ger Elettronica S.R.L. Method and device for folding piles of sheets
FR2850670A1 (en) * 2003-02-04 2004-08-06 Ct Tech Cuir Chaussure Maroqui Untanned hide folding machine comprises series of conveyors that tilt about transverse axes and one that folds in lengthwise sections
WO2004074520A2 (en) * 2003-02-04 2004-09-02 Centre Technique Cuir Chaussure Maroquinerie Machine for folding skins
WO2004074520A3 (en) * 2003-02-04 2004-10-14 Ct Tech Cuir Chaussure Maroqui Machine for folding skins
US8091390B2 (en) 2006-08-16 2012-01-10 Cargill, Incorporated Hide folding system and method
ITVI20110131A1 (en) * 2011-05-23 2012-11-24 Feltre Srl PLANT FOR BENDING FLEXIBLE LAMINAR ELEMENTS
WO2012160078A1 (en) * 2011-05-23 2012-11-29 Feltre Srl System for folding thin flexible elements

Also Published As

Publication number Publication date
FR2579995A1 (en) 1986-10-10
FR2579995B1 (en) 1987-05-29

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