A MACHINE FOR MOVING AND CUTTING HIDES AND THE LIKE |
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申请号 | EP07822727.9 | 申请日 | 2007-11-20 | 公开(公告)号 | EP2102371B1 | 公开(公告)日 | 2010-12-29 |
申请人 | Teseo S.p.A.; | 发明人 | GALLUCCI, Gianni; | ||||
摘要 | A machine for moving and automatically cutting hides and the like, comprising: an aspirating plane (1); an overlying cutting unit (T); a first ring-wound conveyor (2) comprising a belt (20) made of a permeable material wound on relative rollers (22A, 22B), comprising a drive roller (22A) and a driven roller (22B), having an upper branch (21) which is superposed on the aspirating plane (1), and interested at edges thereof by broadenings (25, 26); the belt (20) being attracted during transit by the aspirating plane (1), dragging without constraint above the aspirating plane; a second conveyor (3), made of permeable material, an upper branch (31) of which restingly receives the hides P and is interposed between the cutting unit (T) and the upper branch (21) of the first conveyor (2). | ||||||
权利要求 | |||||||
说明书全文 | The present invention relates to the particular technical sector of machines for automatic working of flat articles, in particular to the movement, for example intermittent, of hides and similar materials and to the cutting and/or incision thereof in order to obtain shapes therefrom. In the above-mentioned technical sector, it is very important to keep the hides well-laid-out and perfectly stretched during the cutting and/or incision operations, performed by a special mobile cutting unit. To this end, the present applicant is the proprietor of a PCT application, PCT/IB2006/001619, entitled "A Machine for Moving and Automatically Cutting Hides and the Like" (corresponding to This machine, partially illustrated in The second conveyor 3 comprises idle rollers 32 positioned externally of the rollers 22A, 22B of the first conveyor 2, and an upper branch 31 interposed between the cutting unit T and the upper branch 21 of the first conveyor 2, in proximity thereof. The upper branch 31 of the second conveyor 3 is destined, together with the hides P stretched thereon, to be attracted adheringly to and drawn by the upper branch 21 of the first conveyor 2, consequently to the aspirating action of the plate 1; it transits thus below the cutting unit T, enabling the cutting unit T to perform the cutting operations on the hides P stretched thereon, and also represents a protection element of the central region of the upper branch 21 of the first conveyor 2 and the plate 1 from the action of the cutting unit T. The width of the belt 20 is such as not to project beyond the rollers 22A, 22B; it is constituted by a heterogeneous material, such as a synthetic textile material, impregnated with synthetic resin, for example PVC, and is woven such as to identify a plurality of through-holes. Owing to the special characteristics of the material used for the conveyor, it can happen that during machine functioning the belt does not stay in trim, i.e. it tends to deviate from the axis thereof. Use of rollers provided with guide edges does not solve the problem as the belt tends to move towards one side, with all the problems that this brings for the movement thereof and for the automatic cutting of the hides and the like stretched on the belt of the second conveyor 3. The fact that the belt 20, during the functioning of the machine, does not maintain its initial trim leads to incorrect advancing of the belt 30 of the second conveyor 3 and therefore of the hides resting thereon, as the aspirating action of the plate is no longer homogeneous on the belt 30 of the second conveyor 3 and therefore on the hides, damaging the cutting of the hides. The present applicant has performed experiments with the aim of finding new technical solutions aimed at maintaining a predetermined trim of the belt of the first conveyor with repect to the drive and driven rollers the belt is wound upon, as well as to reduce both the realisation costs of the belt itself and the times required for setting it up to work. In this regard an aim of the invention is to provide a machine, of the type described herein above, which is conformed such as to maintain the correct spatial position of the belt of the first conveyor over time, independently of the transversal dimensions thereof. A further aim of the present invention is to provide a machine which attains the preceding aim by means of an easily-assemblable combination of elements which require only limited maintenance. A still further aim of the invention consists in providing a machine in which mounting and dismounting of the belt of the first conveyor on and from the drive and driven rollers is simple and rapid. A further aim of the present invention consists in providing a machine the costs of which are relatively contained with respect to the advantages which are provided. The above-cited aims are attained, as set out in the content of the appended claims. The characteristics of the invention will emerge from the following description, in which a preferred through not exclusive embodiment of the invention will be illustrated, with reference to the accompanying figures of the drawings, in which:
During the following description a first ( With reference to The machine 100 comprises: a fixed plate 1, interested by a series of through-holes, not illustrated, which are connected to a source in depression, also not illustrated; a cutting unit T arranged and operating above the aspirating plate 1; a first ring-wound conveyor 2, constituted by a belt 20 wound on relative rollers 22A, 22B, respectively a drive and a driven roller, an upper branch 21 of which belt 20 is arranged such as to be superposed above, and in proximity of, the aspirating plate 1, the belt 20 being provided with a central region realised in permeable material, destined, consequently of the transit thereof above the plate 1, to be attracted by the plate 1 and to drag without constraint above the plate 1; a second ring-wound conveyor 3, constituted by a belt 30 made of a permeable material, for example felt, which is wound on relative idle rollers 32 and an upper branch 31 of which is destined to restingly receive hides P in a stretched-out configuration. The second conveyor 3 comprises idle rollers 32 positioned externally of the rollers 22A, 22B of the first conveyor 2, and an upper branch 31 interposed between the cutting unit T and the upper branch 21 of the first conveyor 2, in proximity thereof. The upper branch 31 of the second conveyor 3 is destined, together with the hides P stretched thereon, to be attracted adheringly and drawn by the upper branch 21 of the first conveyor 2, in consequence of the aspirating action of the plate 1; thus the upper branch 31 transits below the cutting unit T, enabling the cutting unit T to perform the cutting operations on the hides P, and further represents a protection element of the central region of the upper branch 21 of the first conveyor 2 and of the plate 1 from the action of the cutting unit T. The belt 20 has a width such as not to project with edges thereof from the rollers 22A, 22B; the belt 20 is constituted by a heterogeneous material, such as a synthetic textile, impregnated with a synthetic resin, for example PVC, and is woven such as to identify a plurality of through-holes at least at the relative central region thereof; with reference to The realisation of the belt 20 is also simple and the mounting and dismounting thereof onto and from the rollers 22A, 22B does not require highly specialised personnel, all of which has a positive effect on the costs associated to the machine. A still further advantage of the present invention consists in having designed a machine for moving and automatically cutting hides and the like the costs of which are relatively contained with respect to the advantages obtained, and which is made up of a combination of elements that are easy to assemble and that require limited maintenance. In the second embodiment of the present invention, see There is, therefore, a stable self-positioning of the belt 20 with respect to the rollers 22A, 22B and at the same time a permanent transversal stretching of the upper branch 21 of the belt 20; these advantageous technical-functional aspects are independent of the movement direction of the belt 20 and are not subordinated to the maintaining of the parallel situation of the axes of the rollers 22A, 22B. The second embodiment retains the above-described advantages of the first embodiment. In a third embodiment of the invention, see In the illustrated example, the abutment organs 50 are provided, for example, in proximity of the driven roller 22B (but they could also be located, or only located, at the drive roller 22A, see the part described in a broken line in The complementary action of the units 51, 52 on the belt 20 ensures correct positioning of the belt with respect to the rollers 22A, 22B on which the belt is wound; the abutments 55 of the units 51, 52 respectively contact the internal lateral surfaces 25h, 26h of the broadenings 25, 26, maintaining the belt 20 in position. As can be seen in The suitable mutual arrangement of the units 51, 52 further guarantees the transversal stretching of the belt 20, thanks to the abutment action exerted by the relative abutments 55 against the broadenings 25, 26, with all the positive implications which this brings to the correct functioning of the cutting operations on the hides P. In the light of the above, the units 51, 52 can be integrated into the machine 100 to impose a definite positioning, for example centred, of the belt 20 with respect to the winding rollers 22A, 22B, or to function substantially as guide elements of the belt 20 if the reciprocal arrangement thereof is such as to enable zeroing of the resultant force originating in the belt 20 (see above); in the first case the abutments 55 of the units 51, 52 compensate the resultant transversal force of the opposite forces T1, T2, while in the second case the abutments 55 will merely have a guide function. In both cases the belt 20 maintains its stable spatial trim, with respect to the rollers 22A, 22B on which it is wound, and an optimal transversal stretch; these advantageous technical-functional aspects are the same for belts of any width, even greater than 150 cm. The advantage of the present invention consists in having defined a machine which fully satisfies the predetermined aims, as it ensures a stable spatial trim of the belt of the first conveyor and the transversal stretching thereof, with all the positive implications of this for an optimal and precise hide P cutting operation; the machine is also functional, reliable and constituted by elements that are easy to assemble. Advantageously the presence of the abutment and guide organs of the belt 20 of the first ring-wound conveyor 2 improves the stability thereof during functioning even for belts wider than 150cm, thus ensuring a predetermined spatial positioning of the belt 20 with respect to the rollers 22A, 22B on which it is wound, as well as an optimal transversal stretching of the belt 20 itself. This objective has been attained by providing abutment and guide organs which are simply conceived, of modest dimensions, easy to assemble and the reciprocal distance of which, thanks to their constructional simplicity, can easily be adjusted according to operating requirements (definition of a degree of play which enables limited transversal displacements of the belt) and the format of belt used. It is stressed that the organs 50, constituted in the illustrated example by a pair of units 51, 52 which are reciprocally complementary, can be provided, either in addition or alternatively, at other regions of the first ring-wound conveyor 2, for example in the central zone of the lower branch, in proximity of the drive roller 22A or on the upper branch 21; it is further stressed that the organs 50 can alternatively be constituted by a sole abutment and guide unit of the belt 20, which cooperate to advantageously increase the stability of the belt 20. All the above-cited variants have not been represented in the enclosed figures, as they are simple to deduce from the illustrated embodiment. The above has been described by way of non-limiting example, so that any variants of a practical-applicational nature can be considered to fall within the ambit of protection sought for the invention as it is described in the following claims. |