FR2987628A1 - Machine for hemming leather of handbag, has folding device comprising counter-mold and hemming levers, and rods arranged in raising device and in folding device, and pressing device arranged in machine - Google Patents

Abstract

Rebounding machine, method of wrapping, use of such a rewinding machine, repositioning lever (28), assembly of a re-stuffing lever (28) and a re-forming body, and repositioning support, in which the machine method comprises: - a support (14) comprising a fixed impression, - a lifting device (18), and - a folding device (24). The lifting device (18) comprises a base (20) and the device bending device (24) comprises a counter-mold (26) and a plurality of tilting rebate levers (28). The tipping machine further comprises means for moving the lifting device (18) and the folding device (24).

Description

The present invention relates to a machine for repacking, a refilling lever, a refilling lever assembly and a refilling body, a refilling device and a refilling device. method of wrapping, one use, a riming lever, a set of a riming lever and a rim body and a riming support provided with a plurality of rim bodies each provided with a rim padding lever. More particularly, the invention relates to an automatic rewinding machine comprising: - a support comprising a fixed imprint, - a lifting device, and - a folding device. Such automatic stuffing machines are known for making the piece backing of flexible material, such as leather. They are commonly used in the field of leather goods, particularly for the production of luggage-type leather goods such as handbags, etc. Roughing means the action of folding and fixing the outer edge or free edge on one of the two faces of a piece of flexible material, such as a piece of leather or a piece of fabric, in the form of 'a sheet or a blank. Flexibility is understood to mean the capacity of a part as described above to be able to deform sufficiently to be folded back on itself, in particular over a relatively short distance, generally less than a few centimeters, or even less than one centimeter. In practice, the stitching is similar to the realization of a hem, the width of which is generally substantially the same. The realization of a rim or hem comprises in a well-known manner three steps: a lifting step, a folding step and finally a fixing step, as will be described below. Such machines require a change of the set of the tools of repositioning as soon as the shape of the piece to be turned off differs, because these tools are specific of a given piece shape. This change of tools is often tedious and time-consuming. Since the stitching tools do not fit from one piece shape to another for a machine in a given configuration, they can not be reused. That is why, it requires being able to have as many tools as forms of pieces to be tacked, which can also generate tooling costs and costs of realization of the particularly important rim. Moreover, some known machines do not allow to achieve a precise rim, especially when the shape of the piece is complex and has non-rectilinear parts, such as rounded. This may result in the scrapping of the piece to be re-trimmed, especially for very high quality leather goods. In addition, some known machines do not allow to achieve automatically within a perforated part an inner rim alone and / or combined with a second rim or outer rim as defined above. By inner rim, as opposed to an outer rim, is meant the rim or hem made at an opening in a workpiece, the hem being made by folding the inner free edge of the workpiece. The outer rim is made on the outer free edge of the room. The present invention is intended in particular to overcome the aforementioned drawbacks.

For this purpose, according to the invention, the rewinding machine further comprises means for moving the lifting device and the folding device, the lifting device comprises a base, the folding device comprises a counter-mold and a plurality tipping levers. With these provisions, a high quality rim can be made very accurately on a part that its profile is straight or not and whether it is an outer rim and / or interior. In addition, the rewinding machine according to the invention requires only a partial change of the tools when the profile of the rim changes depending on the profile of the shape of the piece to be trimmed and the rim levers are reusable.

In various embodiments of the rewinding machine according to the invention, one or more of the following arrangements may be used which may be considered independently or in combination: the device Furthermore, the lifting device comprises a punch which makes it possible in particular to improve the retention of the workpiece in the position on the machine to be rolled over, - the machine for rewinding also comprises a press device. the counter-mold is fixed to the press device. each riming lever comprises a first tongue provided with a bearing face against which the against-mold can come into abutment and a rim face opposite to the bearing face. - The punch is movably attached to the counter-mold and the punch is movable in translation. the punch, the counter-mold and the base are movable in translation. - The rewinding machine further comprises a synchronization device. - The rewinding machine further comprises suction means that allow to suck the piece to the folding device. The suction means very clearly improve the quality of the rim because they allow a good positioning of the workpiece and the genesis of the fold in combination with a contact surface provided on the face of the padding of the base. the plurality of riming levers is pivotally mounted on a plurality of rim bodies. the folding device further comprises a riming support and each rim body is placed on the riming support.

Furthermore, another object of the invention is a method of wrapping with the aid of such a wrapping machine comprising the following steps: - feeding of a piece having a rim to be tacked, - arrangement of the piece on the support , - lifting the edge to be trimmed, - folding the edge to be trimmed to form a rim. The use of such a rewinding machine according to the invention comprises the following operations. To counter a workpiece, the counter-mold is during a lifting operation of the rim to be moved back along a translation axis in a first direction of translation in the direction of the workpiece to a folding end of travel in which the counter-mold is in abutment on the bearing surface of the rebound levers, then against the mold is moved simultaneously with the base along the translation axis in the first direction of translation to a limit of lifting, the translation of the base causing the rocker of the plurality of rebound levers in a first rocking direction from a rest position to an intermediate position; the intermediate position being located between the rest position and the lifting stroke end. When the machine further comprises a punch, the latter is moved with the against-mold during the lifting operation of the edge to be trimmed along the axis of translation, then the punch and the counter-mold are moved simultaneously with the base along the axis of translation to the end of the lifting stroke.

The lifting device is essentially used to exert pressure on the wrapping modules to ensure a good folding / gluing of the rim. The lifting of the parts is essentially ensured by the pedestal, which when sucked, using suction means, will stress the edge of the room with the impression and cause the genesis of the fold . The translational movement along Z will force the edge of the piece to rise. In various modes of use of the backpacking machine, one or more of the following arrangements may also be used which may be considered independently or in combination: - each padding lever the backing machine comprises a first tongue provided with a bearing face against which the against-mold can come into abutment and a facing face of the opposite to the bearing face during a folding operation, the the base is stationary and the against-mold is moved along the axis of translation in the first direction of translation in the direction of the punch or failing in the direction of the piece to be returned in the absence of punch, the counter-mold contacting the bearing face of each of the riming levers to the end of folding stroke, the translational movement of the counter-mold causing the rocker of the plurality of riming levers in the first direction of bending. ule from the intermediate position to a stitching position. When the machine has a punch, the latter also remains immobile, as the base. - After the folding operation, against the mold, the base is moved along the translation axis in a second direction of translation opposite to the first direction of translation (away from the piece to be trimmed), the translation of the base causing the flip-flop of the plurality of rebound levers in a second flip-flop direction opposite the first flip-flop direction, from the flanged position to the home position. When the machine comprises a punch, the latter is also moved along the translation axis in the second direction of translation, as the base. - The rocker lever levers is performed simultaneously for the plurality of rebound levers. The invention also relates to: - a padding lever for such a machine to re-box, the lever having a first tongue provided with a bearing face and a facing face opposite to the bearing face. a set of a riming lever and a rim body, the riming lever being pivotally mounted on the rim body. - A rim support provided with a plurality of rim bodies each provided with a rim lever. The invention also relates to a trimmer kit for a trimmer machine comprising a plurality of sets of padding levers and padding bodies. The invention will be better understood and its advantages will appear better on reading the following detailed description of embodiments of the invention shown by way of non-limiting examples. The description refers to the accompanying drawings in which: - Figure 1 shows a perspective view of the rolling machine according to the invention; - Figure 2 shows an exploded perspective view of the punch and counter mold of Figure 1, FIG. 3 represents a perspective view of the base of FIG. 1; FIGS. 4A and 4B show a perspective view of an assembly of a riming lever and a rim body according to the invention; with the repositioning lever being respectively in the rest position and in the active repositioning position, - FIG. 5 represents a side view of a repositioning lever according to the invention, - FIG. 6A represents a perspective view of a support of in which the levers are in their rest position; FIG. 6B is a perspective view of the riming support of FIG. 6A, with the rims being in their rest position; l 2 being an exploded perspective view of the riming support of FIG. 6A; FIG. 6D is a perspective view of a riming support according to a variant; FIGS. FIGS. 7A-7G show a partial sectional view according to VII-VII of the reclining machine of FIG. 1 with its various operations of use, FIG. 8 represents a perspective view of a variant of an assembly of FIG. 10A is a schematic view from above of a variant of a set of two riming levers and two rim bodies; FIG. 9B shows a view of a rim and a riming body; in partial perspective of one of the sets of rim levers and rim bodies of Figure 9A, the rim lever being in the rest position, and - Figure 9C is a perspective view of one of the rudder sets. of remborda 8 and the rim body of FIG. 9A, the riming lever being in the active position of the rim. In the different figures, the same references designate identical or similar elements. FIG. 1 represents a machine for reefing 10 comprising a fixed frame 12. The tipping machine 10 comprises a support 14 fixed to the frame 12 and provided with a fixed impression 16. The tying machine 10 further comprises a lifting device 18 comprising a base 20 and a punch 22 arranged in front of the base 20. The rewinding machine 10 according to the invention may not be provided with a punch, the latter improving the maintenance of the piece which must be made a rim. In fact, the machine functions in the same way from the point of view of the other elements whether the punch is present or not. Also, in order to avoid unnecessary repetition and to make a description of a most complete machine, it is described by being provided with such a punch. When the tipping machine 10 is not equipped with a punch, it should simply be ignored in the description below. The tipping machine 10 further includes a bending device 24 having a counter mold 26 and a plurality of rocking rebound levers 28. The lifting device 18 serves in particular to exert pressure on the riming modules in order to ensure a good folding / gluing of the rim. The raising of the parts is essentially ensured by the base 20, which when sucked will stress the edge of the part with the impression 16. The translational movement Z will force the edge of the piece to to get up. For this purpose, the tipping machine 10 further comprises suction means 110. These suction means 110 are of known type and comprise for example a vacuum pump (not shown in the figures). A greater or lesser vacuum can be obtained by means of these suction means to allow the workpiece to be pressed back to the folding device, as described in more detail below. The suction means 110 may preferably be arranged in such a way that the suction is opposite the folding device 24. The tipping machine 10 illustrated in FIG. 1 makes it possible to produce two-piece lugs at the same time. For this purpose, the tipping machine 10 comprises in duplicate a set of tools necessary to make a rim, namely a support 14, a fixed impression 16, a lifting device 18 and a folding device 24. To facilitate the reading, only one of these sets of tools is described for the whole suite; it will be understood that the reel machine 10 as described below functions in a similar manner when it is provided with a set of tools to re-bind or at least two sets of tools to re-bind. In order to visualize the location of the riming levers 28, one of the two pedestals 20 has been removed from FIG. 1. The roping machine 10 further comprises a press device 30 provided with a plate 32 (shown in broken lines). in Figure 1) on which is fixed the counter mold 26 and displacement means described below. The counter mold 26 is preferably immovably fixed and removable to the plate 32. The plate 32 of the press device 30 is fixed to the frame 12 5 by means of rods 34. The plate 32 is slidably mounted, more precisely it is able to move in translation along these rods 34 to come closer to the support 14. The means for moving the machine 10 to rebound include for this purpose driving rods 36 connected to the one hand to press device 30 and secondly to a motor M1 drive. As described in more detail below, the punch 22 is preferably movably attached to the counter mold 26. It is also preferable to facilitate the reuse of the rim tools separately that the punch 22 is releasably secured to the against mold 26 The guide rods 34 of the plate 32 and the drive rods 36 are arranged in parallel manner along a translation axis Z so that the plate 32 is able to move in translation along the longitudinal axis translation axis Z. The support 14 is preferably disposed in a plane P defined by X and Y axes perpendicular to each other and perpendicular to the translation axis Z. The base 20 for supporting the workpiece Refolding (not shown in Figure 1) is slidably mounted on the frame 12 along the translation axis Z. In this case, as shown in Figure 1, the base 20 is housed in the hollow of the fixed impression 16. The base 20, whose shape is the shape of the piece to be returned, is furthermore connected to the means of movement of the rewinding machine 10 which comprise for this purpose a drive device connected to the base 20 This drive device 35 may be connected to the motor M1 connected to the press device or may be connected to a separate motor, in this case a motor M2. In this case, the tipping machine 10 further comprises a synchronization device 38 which makes it possible to synchronize the displacement in translation of the base 20, the counter mold 26 and the punch 22 when the latter is present, both connected to the press plate 32. The suction means 110 may also be connected to the synchronization device 38. In this case, the use of the machine 10 is easier; in particular, the user of the rewinding machine has only one operation to be performed after setting up the part: starting up the rewinding machine. The drive device of the base 20 comprises a motor, but it could also provide a drive device without motor in which the base 20 would for example be slidably mounted on a spring system whose compression would be adapted to the realization of a rim as in the sense of the invention. Thus, as described in more detail below, the punch 22, the counter mold 26 and the base 20 are movable in translation along the translation axis Z and are shown in Figure 1 in the rest position. As indicated above, the punch 22 is movably attached to the counter mold 26. In fact, the punch 22 is suspended against the mold 26, the punch 22 lying opposite the base 20, while the counter mold 26 is located above the punch 22 relative to the base 20 along the translation axis Z. As best illustrated in FIG. 2, the base 22 is movably attached to the counter mold 26 by means of slidably mounted pins 40. in housings 42 provided in the counter mold 26. The punch 22 is fixed to the counter mold 26 by a plurality of pins 40; by way of example as illustrated in FIG. 2, the punch 22 is fixed to the counter mold 26 by means of three pins 40. The pins 40 are free in translation along the translation axis Z in the base 26 to which they are retained by means of fixing means. In the example in question, these are elastic rings 44 of the "circlip" type. On the side of the punch 22, the pins 40 are fixed rigidly and immovably by means of any known fastening means such as for example screws 46. Return springs 48 wound around the pins 40 are arranged between the punch 22 and the counter mold 26. The mobility of the pins 40 in the counter mold 26 allows a free translation of the punch 22 along the translation axis Z relative to the counter mold 26. Thus, the pins 40 allow the punch 22 of be attached to the mold against 26 being free to slide relative to the latter and being suspended under its own weight.

The counter mold 26 is provided with a housing 50 for receiving the punch 22 when the punch 22 and the counter mold 26 are brought closer to each other as described in more detail when describing the use of the punch. 10 topping machine or the method of wrapping. The return springs 48 surrounding the pins 40 recall the punch 22 to its suspended position. The outline of the elements (punch 22 against mold 26 and base 20) may be related to the contour of the rim to be produced. In the present case, as illustrated in FIG. 2, the punch 22 and the counter mold 26 have a contour similar to the base 20, but are of a slightly different size with respect to each other, in particular to make room for the lever rebounding 28 to switch. Referring to Figure 1, the rebound levers 28 are arranged on a rim support 52 whose geometric shape and in particular the contour will adapt to the shape of the part on which a rim will be made using The backing support 52 is detachably attached to the frame 12 by being suitably housed in the holder 14. Referring to FIGS. 1 and 3, the base 20 is provided with a face 54 arranged opposite the riming support 52 and more particularly of the plurality of rim levers 28 having a shape complementary to the riming support 52, so that the riming levers 28 can tilt as will be seen in more detail by the following. The rim levers 28 are pivotally mounted in the rim support 52 through a plurality of rim bodies 56, as best illustrated in Figures 4A and 4B. In the present case, FIGS. 4A and 4B show a rebounding lever 28 according to the invention pivotally disposed in a body of rebounding 56. In order to be able to make a ribbon according to the invention, the rebounding lever 28 can rock freely around an axis X1 which is preferably contained in the plane P as defined above. Thus to make a rim according to the invention, the riming lever 28 can switch between a rest position as illustrated in FIG. 4A in which the riming lever 28 is raised in the direction of the translation axis Z and a stent position as shown in Figure 4B in which the rebound lever 28 is tilted in the direction of the plane P as defined above. The wrapping body 56 is provided with a housing 58 shaped to allow the flip-flop lever 28 to swing between its rest position and its active rim position in a first flip-flop direction B1 and in a second opposite flip-flop direction B2. at first. The rebounding lever 28 comprises a first tongue 28A provided with a bearing face 60 against which the counter mold 26 can come into abutment and a facing face 62 opposite to the bearing face 60. As best seen in FIG. Figure 5, the bearing face 60 and the flange face 62 are preferably substantially planar and parallel to each other. The second tab 28B located on the other side of the flip-flop axis X1 with respect to the first tab 28A is itself of more curved shape and has a contact face 64 against which the base 20 and more particularly the face of rim 54 of the base 20, can come into contact.

The rim face 54 of the base 20 is further provided at its upper end with a contact face 54C to be able to come into contact with the riming levers 28 and in particular with the first tongue 28A. The riming lever 28 is pivotally mounted in the rim body 56 by any known pivot-type means, such as a bearing connection, a rolling connection, etc. In its rest position, as illustrated in FIG. 4A, the lever 28 and more particularly the first tongue 28A comes into contact with a first abutment surface 68 provided on the rim body 56. In the present case, the first tongue 28A of the rebound lever 28 has a first abutment surface 66 adapted to engage a first abutment surface 68 provided on the rim body 56. In order to preserve the flatness of the abutment face 60, the first abutment surface 66 of the first tongue 28A is slightly beveled. In this case, as best shown in Figure 5, the first abutment surface 66 of the first tongue 28A 30 is inclined towards the front of the first tongue 28A, in this case towards its free end 28A 'd' an angle α with respect to the bearing face 60. This angle may be preferably between 10 and 45 °, more preferably of the order of 20 °. In the active rebounding position, as shown in FIG. 4B, the rebounding lever 28 and more precisely the second tab 28B abuts against the rebound body 56. For this purpose, the second tab 28B of the rebounding lever 28 is provided with a second abutment surface 70 adapted to abut against a second abutment surface 72 provided on the rim body 56. Thus, it is understood that even if the riming lever 28 is rotatably mounted in the However, the rebounding lever 28 can not tilt in the latter only between two extreme positions defined by the rest position (see FIG. 4A) and the active position of the backing (FIG. 4B). ).

In order to produce a rim according to the invention, the rim support 52 is provided with a plurality of rim bodies 56 each provided with a riming lever 28 as illustrated in Figs. 6A-6C. At the location of the rim bodies 56, the riming support 52 has a rim face 74 whose profile is adapted to that of the shape of the part on which a rim will be made. As can be seen in FIGS. 6A to 6D, the profile of the rim face 74 has the same rounded shape as that of the rim to be produced. The plurality of rim bodies 56 is disposed within the rim support 52 following the same profile. For this purpose, the rim body 56 comprises a set of fasteners 76 comprising for example a plurality of screws 78 for individually securing each of the rim bodies 56 to the riming support 52, a holding plate 80 and a straight endpiece 82 and a left end 84, as shown in detail in Figure 6C. The riming support 52 further comprises along its rim face 74 a recess 86 shaped so that after assembly, each of the rebound levers 28 is able to freely switch between its rest position and its active position of rim. It will thus be understood that, depending on the shape of the piece to be padded, the riming support 52, and in particular the profile of its rim face 74, is adapted so as to receive and allow an adequate positioning of each the wrapping bodies 56 provided with the plurality of wrapping levers 28. Thus, according to the arrangement of the wrapping bodies 56 in the border support 52 and in particular the bordering levers 28 in the bordering support 52, a rim is produced on a piece of different shape. In order to obtain a high-quality rim, the surfaces of the riming tools which are useful for lifting and folding the workpiece are preferably flat. In particular, it is preferable that the useful surfaces of the base 20, the punch 22, the counter mold 26, the bearing face 60 and the rim face 62 of each of the rebound levers 28 are planar. In this case, the useful surfaces of the base 20, the punch 22, the counter mold 26 preferably extend in the plane P. The face 62 can be degraded during repeated use, it can also be expected that it is detachably fastened to the first tongue 28A of each of the rebound levers 28 so that it can be replaced without having to change the entire rebounding lever 28. The rebonding face 62 is preferably made of a very strong metal material mechanically , like a steel. The levers 28 are for example entirely made of Toolox® 33, a steel marketed by SSAB. As for the mold 20 and the punch 22, a material that is both hard and allows good sliding in contact with the workpiece 88 is used. Thermoplastic materials such as, for example, a high-density polyethylene (HDPE) can be used for this purpose. .

Moreover, still in order to obtain a high-quality rim, in addition to the good surface condition of the riming tools as aforesaid and an adaptation of the riming support 52 to the rim profile to be produced according to the shape of the piece 88, the such as the base 20, the punch 22 and the counter mold 26 are also preferably adapted to the rim profile to be produced. Depending on the complexity of the shape of the workpiece, the rewinding machine 10 may be provided with a plurality of rim supports 52, as shown in FIG. 6D. With the rewinding machine 10 according to the invention, it is possible to reuse both the rim supports 52, the rim levers 28 and 15 their rim body 56. In fact, it is understood that each rim lever 28 and its rim body 56 form an assembly that can be arranged very easily in a rim support 52 and this whatever the profile of the latter. The possibility of reusing these different tools also meets the sustainable development needs associated with the manufacture of the products. Likewise, it may be provided to somewhat standardize the riming supports 52 having, for example, the shapes of the right-sided type 74 rectangle faces 52L in order to make a rectilinear rim, of the curved type with a rim side of the rim. concave padding 52C1 to provide a concave rim or a convex rim backing pad 52C2 so as to provide a convex rim. Depending on the shape of the riming support 52 and the disposition of the riming levers 28, the roping machine 10 allows external rims and / or interior rims to be made as shown in FIG. 6D. Thanks to the machine 10 to re-bind according to the invention, it is possible to make all forms of ribbon, whether they are internal and / or external, and to achieve all the parts necessary for the making of an article leather goods such as a bag for example in one operation. In addition, in order to minimize the cost of making the rim, it is possible to provide a plurality of rim supports 52, as previously mentioned, said rim supports 52 that can be reused. By being arranged in a different way, it is understood that the aforementioned riming supports allow for rims on parts having a different shape. It is conceivable to design a kit for a rewinder according to the invention comprising a plurality of bending supports of different sizes and shapes associated with a plurality of riming levers and a plurality of rim bodies in order to be able to produce rim capable of being able to adapt to the different possible forms of pieces 88 to be trimmed, whether for an external and / or internal remorse. Thanks to this great modularity, it is even possible to envisage simultaneous re-wrapping of pieces intended for different leather goods. Indeed, it is not uncommon to have to produce parts corresponding to different series with a different number of parts to produce. With existing machines, one has to wait for the number of pieces in a series to be reached in order to move on to the next because the production tool has to be dismantled and adapted to the next series. This does not allow great flexibility. With a rewinding machine according to the invention, it is even possible, if desired, to couple the production of several series of pieces for different articles on the same machine at the same time or as mentioned above to produce the same product. set of parts for the same article. Simply mount the desired rim supports using such a kit. With a rewinding machine 10 according to the invention, it is therefore quite possible to lower the production costs of making leather goods with great flexibility while allowing the realization of a high quality rim. With reference to Figs. 7A-7G, the wrapping method according to the invention is carried out by means of a wrapping machine 10 and comprises the following steps. A piece 88, for example, a sheet of leather or any other flexible material having a flexibility equivalent to that of the leather is fed to the reeling machine 10, 15 as illustrated in FIG. 7A. As is well known, the piece 88 has previously been cut to the desired shape and generally has cutouts of material at its free edge on the non-linear portions in order to facilitate the wrapping operations and to limit the thickness of the material. hem or rim at said non-linear portions. The part 88 is disposed on the base 20 so that the edge 90 to be trimmed is placed on the fixed footprint 16, as shown in Figure 7A. After orienting the workpiece to be trimmed so that the rim is on the selected face and before any stitching step, the operator coats the surface of the piece 88 for receiving the rim at the free edge with a substance. 30 adhesive, such as an adhesive, to ensure the attachment and good behavior of the rim over time. Typically, aqueous leather adhesives are used for leather parts, such as, for example, Coratex 298S glue sold in particular by K6mmerling. This gluing step is carried out in a well-known manner as for existing trimming machines. The edge 90 to be trimmed is then raised in a first step using the rebound levers 28 as shown in Figure 7B. This step of raising the edge 90 to be resurfaced consists in fact to raise the edge 90 substantially in a direction parallel to the axis Z and to bring it inward 88 of the piece to be reopened. The padding lever 28 prepares the rim only. The base 20 is sucked by means of suction means 110 provided on the machine 10, which makes it descend and causes a breakage of the workpiece at the level of the fixed impression 16 on the face of contact 54C of the rim face 54 of the base 20. The suction synchronously causes the rotation of the lever 28 which performs the folding; the fixing of the rim as such is ensured by the pressure of the punch 22 on the lever 28 at the end of the folding step. The wrapping process then comprises a second step: a folding step of the edge 90 to be trimmed 20 so as to form the rim 90 'as illustrated in FIGS. 7C and 7D by bringing the edge 90 towards the piece 88. A rim 90 'as shown in Figure 7D is achieved using the machine 10 to rebound according to the invention by performing the operations as follows. After having set up the riming tools (support 14, fixed impression 16, lifting device 18 and folding device 24), the reeling machine 10 according to the invention is ready to be used to make a 90 'rim on a piece 88 to be trimmed. Once the riming tools are put in place, it is no longer necessary to intervene to change them as the shape of the rim to achieve can be using these tools. The wrapping machine 10 according to the invention is particularly suitable for automatically producing rims on leather goods and this in small and / or medium series in particular. From the high position or rest position as illustrated in FIG. 7A, in which all the repositioning tools are at rest, and after having disposed the piece 88 to be tacked on the base 20, the punch 22 and the against mold 26 are moved along the translation axis Z downwards in the direction of the arrow F1 to come closer to the support 14 and in particular the part 88 to be trimmed. In this rest position, the ratchet levers 28 are raised upwards; in fact their first and second tongues are oriented in the direction of the translation axis Z. The base 20, the punch 22 and the counter mold 26 are all in the up position. The press device is then started so that the punch 22 and the counter mold 26 are moved along the translation axis Z in the first direction of translation along the arrow F1. In this case, the punch 22 and the counter mold 26 moves towards the piece 88 to be trimmed while approaching it, while the base 20 is for the moment kept motionless. This translation along the translation axis Z in the direction of translation along the arrow F1 of the punch 22 and against the mold 26 is done using the drive means 25 and in particular the motor M1 until that the punch 22 is brought into contact with the piece 88 to be trimmed, as illustrated in FIG. 7B. From this moment, the base 20 begins to move along the axis of translation Z in the same direction of translation F1 and this continuously and concomitantly with the punch 22 and against the mold 26. The drive means the press device 30 and in particular the counter mold 26, the punch 22 and the base 20 are adapted so that the displacement in translation of these three elements is at the same speed. For this purpose, the synchronization means 38 are engaged so that the motor M2 allows the translation of the base 20 and this in a manner synchronized with the translation of the counter mold 26.

The punch 22 and the counter mold 26 are thus moved simultaneously with the base 20 along the translation axis Z in the first translation direction F1 and at the same speed until a lifting end of stroke, such as illustrated in Figure 7B in which the base 20 has arrived at the end of the race. The descent of the base 20 caused the beginning of tilting of each of the rebound levers 28 in a first flip-flop direction B1. In this first flip-flop direction B1, the first tab 28A approaches the piece to be tacked while the second tab 28B departs from it. For this purpose, the base 20 and in particular its flange face 54 is adapted to come into contact with the second tongue 28B of each of the rebound levers 28. As best illustrated in Figure 3, the facing face 54 of the base 20 has a recess 54A which ends in the upper part by a shoulder 54B adapted to come into contact with the second tongue 28B of each of the rebound levers 28 to form a stop. Due to the arrangement and the conformation of the riming face 54 and the riming levers 28, the displacement in translation of the base 20 by suction in the first direction F1, causes a rocking of the riming levers 28 in the first direction of flip flop B1. In fact, in the rest position, the shoulder 54B is located above the second tabs 28B, the latter being housed at least partly in the recess 54A. The rebound levers 28 being free to tilt around the axis X1, the simple contact of the shoulder 54B with the second tab 28B of each rebound levers 28 drives the latch of the latter.

When the rocker lever rebound 28 begins, we reach the end of the lifting step and go to the folding step as shown in Figures 7C and 7D.

At the end of the lifting stroke, the displacement in translation of the base 20 is stopped, the base 20 is immobilized; it follows that the punch 22 is also immobilized, the workpiece 88 being sandwiched between the base 20 and the punch 22, while the counter mold 26 continues to be moved in the direction of the arrow F1. The counter mold 26 thus gets closer to the punch 22. As the mold 26 moves, the punch 22 is housed more and more in the housing 50 provided for this purpose in the counter mold 26.

At the end of the lifting step, the facing face 62 of the first tongue 28A of each of the rebound levers 28 is in contact with the edge 90, it follows that when each of the rebound levers 28 begins to tilt, the edge 90 begins to be folded towards the piece 88 beyond its raising position. In order to continue the tilting of the rebound levers 28 in the first flip-flop direction B1 and to apply sufficient pressure on the piece to be trimmed to form the fold of the ribbon and adhere the glue, the counter mold 26 comes into contact with the first tongue 28A of each of the rebound levers 28 and continues its displacement in translation along the translation axis Z until reaching the end of folding stroke, in which the counter mold 26 abuts on the face In this folding end-of-travel position, the riming levers 28 are all in the active position of the rim and in which the rim 90 'is made as shown in FIG. 7D.

Figure 7C shows an intermediate position of the intermediate position rebound levers 28 in which the base 20 and the punch 22 have reached the lifting stroke end and the folding operation has started. The folding operation then continues until the rim 90 'as shown in Figure 7D, the rebound levers 28 continuing their rocking from this intermediate position to their active position of rebounding. After the folding operation, when the rim 90 'is made, the movement of the rim tools is reversed in the direction B2. First, the counter mold 26 is moved along the translation axis Z in the second direction of translation along an arrow F2 in the opposite direction to the first translation direction F1. It follows that the counter mold 26 begins to move away from the punch as shown in FIG. 7D while the latter and the base 20 are still motionless. It is the same for the rebound levers 28 which are always in contact with the rim 90 '. Synchronizing device 38 is then used to engage upward translational movement of pedestal 20 along translation axis Z in the direction of arrow F2, as shown in Figure 7E. The padding face 54 of the base 20 is further provided at its upper end with a contact face 54C to be able to come into contact with the riming levers 28 and in particular with the first tongue 28A, when the base begins to move. in translation upwards along the translation axis Z (in the second translation direction F2), the contact surface 54C bears against the first tongues 28A so that the rebound levers 28 begin to tilt around of the axis X1 in the second direction of flip-flop B2 opposite the first flip-flop direction B1 as illustrated in FIG. 7F. Thus, the rebound levers 28 pass successively from their active rebound position (FIGS. 6B, 7D and 7E) to their rest position, as illustrated in FIGS. 6A and 7G. The translation in the second direction of translation (arrow F2) of the counter mold 26 continues until reaching its rest position also illustrated in Figure 7G driving with it the displacement in translation upwards of the punch 22. Under the effect return springs 48 wound around the pins 40 disposed between the punch 22 and the counter mold 26, the punch 22 emerges from the housing 50 provided in the counter mold 26 and is again suspended under its own weight. The base 20 is also moved upwards in the second direction of translation (arrow F2) until it reaches the rest position illustrated in FIG. 7G.

From the rest position illustrated in FIG. 7G, where all the repositioning tools have returned to their initial position, the reeling machine 10 is ready to be used again to make a 90 'rim on a new piece 88 to be re-trimmed. A cycle can be restarted with a lifting and folding operation as described above. The riming tools (support 14, fixed impression 16, lifting device 18 and folding device 24) can remain in place as the rim to achieve change profile. A partial or total change of the tools of repositioning can be envisaged according to the change of the profile of the shape of the piece to be topped up, or from one piece 88 to another. In all cases, the sets formed by the rim levers 28 and the rim bodies 56 are reusable even if the rim profile changes. In order to achieve a high quality 90 'rim, the flip of the ratchet levers 28 is performed simultaneously for the plurality of riming levers 28. However, depending on the implementation of the rammer 10 with the riming tools, it may quite possibly be possible for the rebound levers 28 to be tilted simultaneously or separately, in particular, when the reeling machine makes it possible simultaneously to produce internal and / or external lining.

Figure 8 shows a perspective view of an assembly of a rim lever 28 and a rim body 56 according to a variant. In this variant, the rebound lever 28 does not have two tabs, but a single tab 28 '. The tongue 28 'is provided with a bearing face 60 against which the counter mold 26 can come into abutment and a facing face 62 opposite to the bearing face 60. The bearing face 60 and the tacking face 62 are preferably substantially planar and parallel to each other. The second tongue being absent on this lever, the latter is fixed to the rim body 56 by means of a spring 100 which allows both the rotation of the lever 28 around the rocker axis X1 and a translation along The spring 100 allows the lever 28 to return to the rest position, while the translation allows it to compensate for displacements during the realization of the rim. FIGS. 9A to 9C show a variant of riming levers 28 and of rimwork body 56 which makes it possible to produce right-angle rims. Two sets of a riming lever 28 and a ridge body 56 are arranged at 90 ° as illustrated in FIG. 9A, so that the two levers 28 can swing about their respective latch axis X1 positioned at 90 °. relative to each other. The rocker levers 28 being simultaneously for the two levers, the first tab 28A is tapered. In the present case, as illustrated in FIGS. 9A to 9C, each of the first tongues 28A is tapered at 45 ° to allow the rocker side by side of the levers positioned at 90 ° relative to each other. In fact, the first tab 28A of one of the two sets is beveled symmetrically with respect to the first tab 28A of the other of the two sets. It is preferentially the same for the second tongues 28B.

Claims (19)

REVENDICATIONS1. Rebounding machine comprising: - a support (14) comprising a fixed impression (16), - a lifting device (18), and - a folding device (24), characterized in that the lifting device (18) comprises a base (20), in that the folding device (24) comprises a counter-mold (26) and a plurality of tilting rebound levers (28), and in that the rewinding machine further comprises means for displacing (M1, M2, 34, 36) the lifting device (18) and the folding device (24). 2. The machine according to claim 1 further comprising a press device (30). The tipping machine according to the preceding claim, wherein the counter mold (26) is attached to the press device (30). 4. Rebounding machine according to the preceding claim, wherein each rebounding lever (28) comprises a first tongue (28A) provided with a bearing surface (60) against which the against-mold (26) can come into contact. support and a rim face (62) opposite the bearing face (60). The tipping machine according to any one of the preceding claims, wherein the tying device (18) further comprises a punch (22). 6. Rebounding machine according to the preceding claim, wherein the punch (22) is movably attached to the counter-mold (26) and wherein the punch (22) is movable in translation. 35 7. Rewinding machine according to any preceding claim, wherein the against-mold (26) and the base (20) are movable in translation. 8. Rebounding machine according to any one of the preceding claims, further comprising suction means (110) for sucking the workpiece (88) to the folding device (24). The tipping machine according to any one of the preceding claims, wherein the plurality of rebound levers (28) are pivotally mounted to a plurality of reed bodies (56). 10. Rebounding machine according to the preceding claim, wherein the folding device (24) further comprises a riming support (52) and wherein each rim body (56) is disposed on the riming support (52). . 11. A method of rebonding using a rolling machine according to any one of the preceding claims, comprising the following steps: - supplying a workpiece (88) having an edge (90) to 20 back, - provision of the piece (88) on the support (14), - raising of the edge (90) to be trimmed, - folding of the edge (90) to be trimmed to form a rim (90 '). 12. Use of a rolling machine according to claim 4 and any one of claims 1 to 10 to re-form a workpiece (88) having an edge (90) to be trimmed, in which during a lifting step 30 from the edge (90) to be returned, the against-mold (26) is moved along a translation axis (Z) in a first direction of translation (F1) towards the piece (88) to an end bending stroke in which the counter-mold (26) abuts against the bearing face (60) of the ratchet levers (28), and then the counter-mold (26) is moved simultaneously with the base (20) along the axis of translation (Z) in the first direction of translation (F1) to a lifting stroke end, the displacement in translation of the base (20) causing the rocker of the plurality of rebound levers ( 28) in a first rocking direction (B1) from a rest position to an intermediate position. 13. Use of a rolling machine according to the preceding claim, wherein each rebounding lever (28) of the rewinding machine (10) comprises a first tongue (28A) provided with a bearing face (60). against which the against-mold (26) can abut and a facing face (62) opposite to the bearing face (60), in which during a folding operation the base (20) is immobile and against the mold (26) is displaced along the translation axis (Z) in the first direction of translation (F1) towards the workpiece (88), the against-mold (26) coming into contact with the face of the support (60) of each of the rebound levers (28) until the end of the folding stroke, the translational displacement of the counter mold (26) causing the rocker of the plurality of rebound levers (28) in the first flip-flop direction (B1) from the intermediate position to an active repositioning position. 25 14. Use of a rolling machine according to any one of claims 12 to 13, wherein after the folding operation, the against-mold (26) and the base (20) are moved along the axis translation (Z) in a second direction of translation (F2) opposite to the first direction of translation (F1), the displacement in translation of the base (20) causing the rocker of the plurality of rebound levers (28) in a second flip-flop direction (B2) opposite the first flip-flop direction (B1), from the active position of the flanging to the rest position. 15. Use of a rewinding machine according to any one of claims 12 to 14, wherein the flip-flop levers (28) is performed simultaneously for the plurality of rebound levers (28). 16. Rebound lever for a rewinding machine according to any one of claims 1 to 10, characterized in that the rebounding lever (28) has a first tongue (28A) provided with a bearing face (60). and a rim face (62) opposite to the bearing face (60). 17. A set of a rim lever according to the preceding claim and a rim body, characterized in that the riming lever (28) is tiltably mounted on the rim body (56). 18. A riming support characterized in that it is provided with a plurality of rim bodies (56) and a plurality of riming lever (28) according to claim 16, each rim lever (28) being tilting mount on the rim body (56). 19. A trimmer kit comprising a plurality of sets of rim levers and rim bodies according to claim 17.