• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Device (1) for transporting preforms (2) of plastic containers, this device (1) comprising an endlessly circulating element (11) having an external face (16) and being capable of driving the preforms (2) along of a path (T) by friction against the preforms (2), this device (1) comprising a fixed support (29) defining a flat face (30) of support for the preforms (2), the element (11) circulating bearing a series of brushes (19) which project from the outer face (16), able to come into contact with the preforms (2) to drive them by friction.
    公开号:FR3028254A1
    申请号:FR1460870
    申请日:2014-11-10
    公开日:2016-05-13
    发明作者:Lima Rui De；Sebastien Fevre；Denis Turlotte；Frederic Willig
    申请人:Sidel Participations SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to the transport of articles, and more particularly to the transport of preforms of plastic containers such as PET. A preform generally comprises a closed tubular body, at a lower end, with a hemispherical bottom, and a neck, usually threaded, which extends the body from an upper end thereof. Most preforms are also provided with a flange which separates the neck from the body and facilitates the handling of the preforms. A manufacturing cycle of a container requires many handling operations of the preform from which the container is to be manufactured. From a bulk package in a hopper (or a bowl, or other container), the preform is successively extracted from the hopper, oriented (neck up or neck down), transferred to a heating unit ( or furnace), conveyed in the parade therein to undergo thermal conditioning, and then transferred to a mold to be converted into a container 20 by blow molding or stretch blow molding. The transport speed of the preforms during such a cycle is not constant. In particular, the bulk packaging of the preforms in the hopper or bowl does not allow to feed directly at the output thereof (thereof) the heating unit. There is therefore provided between the hopper and the heating unit an intermediate zone where the preforms are temporarily accumulated to allow continuous feeding of the heating unit. To achieve this accumulation, a transport device with an endless belt is usually employed which drives the preforms by friction along a predetermined path (which may be at least locally linear). French patent FR 2,956,652 or its US equivalent US 2012/312661 (SIDEL PARTICIPATIONS) discloses a conveyor equipped with two endless belts, at least one of which comprises, at the level of an active part in contact with the preforms , a natural material made of leather.
    [0002] This solution, which is currently commonly used, is satisfactory in that it allows to achieve the accumulation of preforms effectively and without damage to them.
    [0003] But the friction against the preforms causes, in the first place, a rapid wear of the leather, which requires the frequent replacement of the belt. Secondly, the friction produces a dust formed of fine leather particles which tends to settle on the preforms and on the conveyor members. As leather is a natural material, the resulting pollution is not harmful, but it is not permissible to allow dust to accumulate on the conveyor, which must therefore undergo frequent cleaning. A first object of the invention is to provide a preform transport device which allows efficient accumulation thereof. A second object of the invention is to provide a preform transport device which has a better wear resistance. A third object of the invention is to provide a transport device which offers a better resistance to heating. For this purpose, it is proposed a device for transporting preforms of plastic containers, this device comprising at least one endless circulating element having an outer face and carrying a series of brushes which project from the external face, adapted to come into contact with the preforms to drive them by friction along a path, this device further comprising a fixed support defining a flat bearing surface for the preforms. The brushes effectively drive the preforms by rubbing the end of their bristles. This friction generates little or no dust (and therefore little pollution), and the wear of the brushes remains slow when the material chosen (for example a nylon ()) is resistant to frictional wear. According to a first embodiment, where each preform has a tubular wall defining a body and a neck separated by a flange which projects radially from the wall, the device comprises a pair of rails spaced from one another, which jointly define at least a portion of the path of the preforms, these rails having coplanar bearing faces for the suspension by their flange of the neck-oriented preforms at the top. At least a portion of the brushes can extend under the rails to come into contact with the body of the preforms.
    [0004] In this first embodiment, the device comprises for example a collar guide which extends vertically above the rails at a distance therefrom greater than or equal to a height of the neck of the preforms; According to a second embodiment, the device comprises a support plate for the neck-down preforms, and the brushes extend above the plate. In this second embodiment, the device may comprise a bottom guide which extends vertically above the plate, at a distance therefrom greater than or equal to an overall height of the preforms.
    [0005] The device comprises for example two circulating elements provided with brushes and having, along the path, parallel strands for jointly driving the preforms by friction. The device may further comprise, on at least part of the path, a lateral guide against which the element flowing is supported by an internal face opposite to the external face. In addition, each brush comprises, for example, a row of tufts of superposed hairs. Likewise, each circulating element may comprise brushes along its entire length.
    [0006] Other objects and advantages of the invention will become apparent in the light of the description of an embodiment, given hereinafter with reference to the accompanying drawings in which: FIG. 1 is a perspective view from above of a device preform transport device equipped with belts provided with brushes, according to a first embodiment in which the preforms are transported neck up; Figure 2 is a detail view, on an enlarged scale, of the device of Figure 1; Figure 3 is a perspective view showing a portion of a brush belt; Figure 4 is a cross-sectional view of the transport device, according to the sectional plane IV-IV of Figure 2; Figure 5 is a detail view in horizontal section of the transport device, according to the sectional plane V-V of Figure 4; Figure 6 is a detail view in longitudinal section of the transport device, according to the sectional plane VI-VI of Figure 4; Figure 7 is an enlarged detail view of an enlarged detail illustrating the driving of a preform through the bristles of a brush of a belt; - Figure 8 is a sectional view similar to Figure 4, illustrating a second embodiment of the transport device, wherein the preforms are transported neck down. FIG. 1 shows a device 1 for conveying (or conveying) preforms 2 of plastic containers, for example made of polyethylene terephthalate (PET). Each preform 2 has a tubular lateral wall 3 defining a body 4 and a neck 5. The body 4 ends, at an end opposite the neck 5, by a hemispherical bottom 6. The neck 5 forms a rim 7 through which the container is intended to be filled. The neck 5 can be threaded to allow the screwing of a plug after filling. According to an embodiment illustrated in the figures, each preform 2 also has an annular flange 8 used to facilitate the handling of preforms 2 (and also containers formed from these preforms 2). In the example shown, the flange 8 extends to the junction between the body 4 and the neck 5, but this configuration is not limiting. In particular, the collar could extend at an end opposite the bottom 6, so as to form the rim of the container. Similarly, the neck 5 is optional, so that the preform could be limited to a smooth body terminated at one end by a bottom and, at an opposite end, by a flange. In addition, the flange 8 is not necessarily continuous; it can include several disjointed angular sectors.
    [0007] In a conventional manner, the raw injection preforms 2 are initially stored in bulk in a container such as a hopper, from which they are extracted by known means (in a hopper, it is for example an elevator; a bowl, it is for example a rotating plate associated with a helical rail) while being oriented neck up or neck down. At the outlet of the container, the preforms 2 are poured onto a linear support 9 (such as a rail in the case of preforms 2 oriented neck up, as shown in Figure 1) where they move by pushing each other. other. In certain critical areas (especially at the junction between the container and the support 9), systems (such as blow guns) may be provided to prevent the jamming of preforms 2. Misaligned preforms 2 at the outlet of the container are reintroduced. in it by means of polarizers, so that the stream of preforms 2 leaving the container is not constant. As a result, the preforms 2 are not necessarily grouped on the linear support 9, trains 10 spaced apart from preforms can then be formed, as illustrated in FIG. 1. In the illustrated configuration, where the support 9 is horizontal, a train 10 isolated preforms (right in Figure 1) does not advance as a next train 10 from the container does not come push. Alternatively, to promote the evacuation of the preforms 2 of the container, the support 9 can be inclined. The preforms 2 coming out of the container are intended to be introduced into a heating unit in order to undergo thermal conditioning by exposure to sources of electromagnetic radiation (eg infrared), so as to be softened so as to be formed into containers by blowing or stretching blow in a forming unit equipped with molds in the footprint of the containers. From the input of the thermal conditioning unit to the forming unit, the preforms 2 are individually supported by gripping means (such as spinners or clamps). The start of the forming cycle, which must produce containers at a rate of several tens of thousands of units per hour, is not subordinated to the presence of preforms 2, so that in the absence of one or more preform (s) in the stream of preforms coming out of (and therefore entering) the thermal conditioning unit, the forming unit rotates empty in the mold (s) supposed to host this (these) preform (s). This results in a waste of energy and a decrease in productivity. This is why a conveyor 1 as shown in Figure 1 is interposed between the container and the heating unit. It is a storage conveyor designed to, from spaced apart preform trains 2 from the container, form a continuous stream of adjacent preforms 2 to be individually supported. The conveyor 1 comprises an endless circulating element 11. In the illustrated example, the circulating element 11 is a belt, that is to say a continuous band, but it could be a chain, formed of a series of looped links articulated relative to each other. to others. In what follows, it is assumed that the circulating element 11 is a belt, which does not exclude another embodiment (in particular a chain). As illustrated, the belt 11 runs on a pair of pulleys or gears, namely a driving wheel 12 and a follower wheel. Each wheel 12, 13 is rotatably mounted on a frame 14 comprising a plate 15 which forms a horizontal plane of support for the belt 11.
    [0008] The belt 11 has an inner face 16 and an opposite outer face 17. According to an embodiment illustrated in the figures, the inner face 16 is notched to engage the teeth of the wheels 12, 13. The outer face 17 forms a succession of crenellations 18. This configuration gives the belt 11 good flexibility.
    [0009] The belt 11 is driven in displacement at a speed noted V1 in Figure 7. The belt 11 carries a series of brushes 19 which protrude from the outer face 17. In the illustrated example, each slot 18 carries a brush 19, which comprises a row of tufts 20 superposed with bristles 21.
    [0010] The belt 11 is arranged to come into contact with the preforms 2 to drive them by friction along a path T. Given the flexibility of the belt 11, this path T is not necessarily plane; it could also be curved. However, in the illustrated example, this path T is both planar and linear and defines a so-called longitudinal direction, which extends in a substantially horizontal plane (with, if necessary, a small slope). It is termed transverse any direction both horizontal and perpendicular to the longitudinal direction. The belt 11 is preferably positioned so that the plane 22 (shown in dashed lines in FIG. 7) swept by the ends of the bristles 21 is offset, towards the inside of the preforms 2, of the plane 23 (represented by the solid line on FIG. 7) scanned by the part of the body 4 of the preforms 2 closest to the belt 11. It results from this shift, referred to as the depth of pass of the brushes 19 and noted P in FIG. 7, that the bristles 21 of each tuft 20 during the movement of the belt 11, rub against the side wall 3 of the preform 2. By their flexibility, the bristles 21 undergo, in contact with the wall 3, a bending which puts the bristles 21 under tension and increases thereby the force exerted by each tuft 20 on the wall 3, tending to drive the preform 2 in motion. According to a preferred embodiment, the depth P of pass is between 0.5 and 3 mm, and for example of the order of 1 mm. As there is a sliding of the bristles 21 on the side wall 3, part of the kinetic energy of the belt 11 is dissipated at the interface between the bristles 21 and the side wall 3, so that the speed, noted V2 The displacement of the preforms 2 is less than the speed V1 of the displacement of the belt 11. A single belt 11 could be provided which would drive the preforms 2 by rubbing against them on one side only. But in such a configuration, it can occur a clean rotation of the preforms 2 about their axis, may reduce their speed V2 displacement. Therefore, according to a preferred embodiment illustrated in Figures 1, 2, 4 and 5, the conveyor 1 comprises two similar belts 11, arranged on either side of the path T. More precisely, the belts 11 present along the path T, parallel strands 24 (longitudinal in the illustrated example) to jointly drive the preforms 2 by friction, along diametrically opposite meridians on the preforms 2. This configuration limits the risk of proper rotation of the preforms 2 and provides a more efficient transmission of the kinetic energy of the (or each) belt 11 to the preforms 2.
    [0011] The material of the bristles 21 is advantageously chosen so that the frictional forces against the lateral wall 3 are sufficiently high to efficiently transmit to the preforms 2 the kinetic energy of the belt 11, so that the heating due to the friction remains measured (to the advantage a better control of the thermal conditioning of the preforms 2), so that the wear of the bristles 21 by friction against the side wall 3 is however relatively slow, and so that any scratches on the side wall 3 are imperceptible. Polyamides, and more particularly Nylon®, provide all of these advantages. The low wear of the bristles 21 guarantees a long life on the (or each) belt 11. Given the relative flexibility of the (or each) belt 11, the bristles 21 tend, under the effect of their support against the lateral wall 3 of the preforms 2, to transmit to the belt 11 a transverse force which, if it remained free, would tend to cause it to bend and therefore to move the brushes 19 away from the preforms 2 and thus to reduce the forces transmitted to these. Also, to maintain a certain transverse stiffness of the (or each) belt 11 along the path T, and thus maintain a relatively high friction force, it is preferable to provide the conveyor 1 with a lateral guide 25, which is extends over at least part of the path T preforms 2, and against which the belt 11 is supported by its internal face 16. According to an embodiment illustrated in Figures 2, 4 and 5, the position of the guide 25 is adjustable transversely. For this purpose, a horizontal portion 26 of the guide 25 is provided with oblong holes 27 in which are introduced screws 28 for fixing the guide 25 on the plate 15. By loosening the screws 28, it is possible to move the guide 25 transversely. In this way, it is possible to adjust the depth P of pass, and therefore the friction force applied by the brushes 19 to the preforms 2. This adjustment also makes it possible to compensate over time the wear of the bristles 21 to maintain relatively constant the depth P of pass. As can be seen in FIGS. 2, 4 and 8, the conveyor 1 comprises a fixed support 29 which defines a flat support surface 30 for the preforms 2.
    [0012] According to a first embodiment, illustrated in Figures 4 and 6, the preforms 2, provided with a collar 8, are oriented neck up. The support 29 is in the form of a pair of rails 31 spaced apart from each other. The rails 31 jointly define at least a portion of the path T of the preforms 2. The rails 31 have coplanar upper support surfaces 30, allowing the suspension, by their flanges 8, preforms 2 oriented neck up. The spacing between the rails 31 is slightly greater than the neck diameter of the preforms 2. The clearance between the rails 31 and the body 4 of the preforms 2 is sufficient to allow the preforms 2 to slide without being wedged, while being sufficiently weak to prevent the passage of the flange 8 and the fall of the preforms 2. In this embodiment, at least a portion of the brushes 19 (all the brushes 19 in the example illustrated in FIG. 4) extends under the rails 31 to come in contact with the body 4 of the preforms 2. A portion of the brushes 19 could however extend above the rails 31 to rub against the neck 5. In this first embodiment, the conveyor 1 preferably comprises a guide 32 of collar which extends in line with the rails 31 at a distance thereof greater than or equal to a height of the neck 5 of the preforms 2, that is to say that a gap is formed between the guide 32 of collar and the drinking 7 of preforms 2. This gu The function of the collar 32 is to prevent the preforms 2 from rising and the flanges 8 from the preforms 2 to overlap, so as to keep the distance between two preforms constant (and equal to the diameter of the flange 8). successive. In the example shown, the collar guide 32 is in the form of a bar with a rectangular section, which has a flat bottom face 33 remote from the rim 7 of the preforms 2 by a few tenths of a millimeter (1 to 2 mm at the most ).
    [0013] According to a second embodiment (illustrated in FIG. 8), the preforms 2 are oriented neck down (and where they may possibly be without a flange, although in the example shown in FIG. 8). In this case, the support 29 is for example in the form of a plate on which the preforms 2 rest by their rim 7. In this configuration, the brushes 19 extend above the plate 29 and rub against the body 4 and / or against the neck 5. Alternatively, the support 29 could be in the form of a pair of rails on which the preforms 2 would rest by their collar (when they are provided). In this second embodiment, the conveyor 1 may comprise a bottom guide 34 which extends vertically above the plate 29, at a distance thereof greater than or equal to an overall height of the preforms 2. This guide 34 limits the risk of forward tilting of the preforms 2 under the effect of the friction forces induced by the brushes 2. This guide 34 can be movable to accompany the preforms along their path and thus further limit the risk of failover. In this case, the guide 34 may be in the form of an endless circulating band mounted between two pulleys. To further avoid any lateral tilting of the preforms 2, slides 35 may be provided, positioned on either side of the body 4 and / or the neck 5. As can be seen in particular in Figure 1, the (or each) belt 11 may include brushes 19 along its length. The implantation of the brushes 19 may be vertical or, alternatively, oblique (that is to say that the different tufts can be staggered). In addition, the conveyor 1 can be equipped with tensioning rollers 36 to put the (or each) belt 11 under tension and thus avoid the undulations in the strand 24 along the path T and maintain a constant orientation of the bristles 21, for the benefit of the effectiveness of the drive of the preforms 2. Each roller 36 tensioner is for example mounted on a plate 37 fixed transversely adjustable on the plate 15 of the conveyor 1. Various alternative or additional provisions may be provided. Firstly, the brushes 19 could be mounted on several independent superimposed belts, which would circulate for example at different speeds so as to maintain a permanent friction of the brushes 19 with the lateral wall 3 of the preforms. Secondly, the conveyor 1 may be equipped, as illustrated in FIG. 1, with one or more device (s) 38 for cleaning (or decontaminating) brushes 19, functioning for example by suction, by exposure to ultraviolet light or by ionized air. This results in a depollution of the conveyor 1 (and therefore the preforms 2), and a compliance of the latter with the sanitary standards in force. Thirdly, the conveyor 1 may be equipped with at least one preform ejector, making it possible to extract from the stream of preforms circulating in the conveyor 1 any preform that is badly oriented and may cause a blockage or intermingling of the preforms 2 along of the path, likely to damage or break at least one of the components of the conveyor I. This ejector would be for example in the form of a movable section of the support 29, which would form a retractable door controlled by the detection of a or several misformed preform (s).
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. Device (1) for transporting preforms (2) of plastic containers, this device (1) comprising an endlessly circulating element (11) having an external face (16) and being capable of driving the preforms (2) along a path (T) by friction against the preforms (2), this device (1) being characterized in that: it comprises a fixed support (29) defining a flat face (30) of support for the preforms (2); ); - The element (11) carries a series of brushes (19) which project from the outer face (16), able to come into contact with the preforms (2) to drive them by friction.
    [0002]
    2. Device (1) for transport according to claim 1, characterized in that each preform (2) having a tubular wall (3) defining a body (4) and a neck (5) separated by a flange (8) which radially protrudes from the wall (3), the support (29) is in the form of a pair of rails (31) spaced from each other, which together define at least a part of the path (T) of the preforms (2), these rails (31) having coplanar bearing faces (30) for the suspension by their collar (8) of the preforms (2) oriented neck up.
    [0003]
    3. Device (1) according to claim 2, characterized in that at least a portion of the brushes (19) extend under the rails (31) to engage the body (4) of the preforms (2).
    [0004]
    4. Device (1) according to claim 2 or claim 3, characterized in that it comprises a collar guide (32) which extends vertically above the rails (31) at a distance thereof greater than or equal to a height of the neck (1) of the preforms (2).
    [0005]
    5. Device (1) according to claim 1, characterized in that the support (29) is in the form of a plate on which rest the preforms (2) oriented neck down, and in that the brushes (19) extend above the plate (29).
    [0006]
    6. Device (1) according to claim 5, characterized in that it comprises a bottom guide (34) which extends vertically above the plate (29) at a distance from it greater than or equal to at an overall height of the preforms (2).
    [0007]
    7. Device (1) according to one of the preceding claims, characterized in that it comprises two circulating elements (11) provided with brushes (19) and having, along the path (T), parallel strands (24) for jointly driving the preforms (2) by friction.
    [0008]
    8. Device (1) according to one of the preceding claims, characterized in that it comprises, on at least part of the path (T), a guide (25) lateral against which rests the element (11). flowing through an internal face (16) opposite to the outer face (17).
    [0009]
    9. Device (1) according to one of the preceding claims, characterized in that each brush (19) comprises a row of tufts (20) of bristles (21) superimposed.
    [0010]
    10. Device (1) according to one of the preceding claims, characterized in that each circulating element (11) comprises brushes (19) along its entire length.
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP3218289A1|2017-09-20|
    CN107074447A|2017-08-18|
    US20170320670A1|2017-11-09|
    US10035655B2|2018-07-31|
    CN107074447B|2019-08-13|
    FR3028254B1|2019-04-12|
    WO2016075389A1|2016-05-19|
    引用文献:
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    EP0805117A2|1996-05-02|1997-11-05|Shmuel Farkas|Conveyor propulsion system|
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    WO2014076450A1|2012-11-16|2014-05-22|Knight Warner Holdings Ltd|Conveyor with brush-like grippers for impelling articles|WO2018046873A1|2016-10-20|2018-03-15|Sidel Participations|Arrangement for pressing together queuing preforms in a conveyor|
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    WO2020249416A1|2019-06-11|2020-12-17|Sidel Participations|Preform accumulation circuit comprising at least two brush conveyors arranged in series|
    FR3102761A1|2019-11-05|2021-05-07|Sidel Participations|Accumulation circuit for aligned and straightened preforms|US4026406A|1975-07-08|1977-05-31|Barilla G. & R. F.11I S.P.A.|Machine for withdrawing bread slices or like products from a continuous cycle belt-type baking oven, and presenting them in a horizontal stack|
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    DE102005043282A1|2005-09-09|2007-03-15|Alpha2Omega Ag|Container e.g. polyethylene terepthalate bottle, transport device, has transport unit comprising spring units that cooperate with support unit or with spring units of other transport units for collecting containers|
    JP5159389B2|2007-10-10|2013-03-06|サントリーホールディングス株式会社|Synthetic resin bottle conveyor|
    FR2956652B1|2010-02-25|2015-12-11|Sidel Participations|INSTALLATION FOR CONVEYING ARTICLES IN THERMOPLASTIC MATERIAL|
    CH704401A1|2011-01-28|2012-07-31|M Tanner Ag|Conveyor for cylindrical bodies, with inclined in conveying direction delivery rails.|
    JP5879576B2|2012-10-26|2016-03-08|キリンテクノシステム株式会社|Container transfer device|FR3051780A1|2016-05-25|2017-12-01|Sidel Participations|METHOD FOR UNLOCKING THE HOLLOW BODY SCROLL IN A SLIDE CONVEYOR|
    CN111729876B|2020-08-18|2021-04-16|新乡职业技术学院|Measurement and control machine for intelligent manufacturing|
    法律状态:
    2015-10-23| PLFP| Fee payment|Year of fee payment: 2 |
    2016-05-13| PLSC| Publication of the preliminary search report|Effective date: 20160513 |
    2016-10-24| PLFP| Fee payment|Year of fee payment: 3 |
    2017-10-20| PLFP| Fee payment|Year of fee payment: 4 |
    2018-10-24| PLFP| Fee payment|Year of fee payment: 5 |
    2019-10-22| PLFP| Fee payment|Year of fee payment: 6 |
    2020-10-21| PLFP| Fee payment|Year of fee payment: 7 |
    2021-10-20| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1460870A|FR3028254B1|2014-11-10|2014-11-10|PROCESS FOR TRANSPORTING PREFORMS OF PLASTIC CONTAINERS|
    FR1460870|2014-11-10|FR1460870A| FR3028254B1|2014-11-10|2014-11-10|PROCESS FOR TRANSPORTING PREFORMS OF PLASTIC CONTAINERS|
    CN201580060922.4A| CN107074447B|2014-11-10|2015-11-04|The conveyer with hairbrush for preform transmission|
    EP15808703.1A| EP3218289A1|2014-11-10|2015-11-04|Brush conveyor for transporting preforms|
    US15/525,420| US10035655B2|2014-11-10|2015-11-04|Brush conveyor for transporting preforms|
    PCT/FR2015/052978| WO2016075389A1|2014-11-10|2015-11-04|Brush conveyor for transporting preforms|
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