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CN-116853581-B - Barrier device

CN116853581BCN 116853581 BCN116853581 BCN 116853581BCN-116853581-B

Abstract

The present invention provides a barrier device adapted to be mounted on a wrapping machine for wrapping objects with wrapping film, in particular on a wrapping machine for wrapping pallets, comprising a barrier rod element for supporting, receiving a portion of film and a support unit for the barrier rod element, the barrier rod element being movable on the support unit from a rest position to an extended operating position in which it extends transversely out of the support unit for heat-sealing the film at the end of the wrapping of the pallet, a support structure for the support unit and a movement device for moving the barrier rod element in a movement direction from a maximum extended position with respect to the pallet to a maximum retracted position, the first movement device comprising interconnected lever means and a first driver arranged to operate the lever means and configured to exert a pulling and pushing action on the lever means in an operating direction arranged transversely with respect to the movement direction.

Inventors

  • YAN XU
  • LI YING

Assignees

  • 珠海赛克科技有限公司

Dates

Publication Date
20260508
Application Date
20230626
Priority Date
20220701

Claims (5)

  1. 1. A blocking device (10), the blocking device (10) being adapted to be mounted on a wrapping and packaging machine (a) of a packaging tray (P) packaged by a packaging film (F), and comprising: -a blocking rod element (14) adapted to support and receive a portion of said packaging film (F), -A support unit (11) of the blocking lever element (14), -Said blocking lever element (14) being movable from a rest position (R1, R2) on said support unit (11) so as to disengage from said packaging film (F) in an extended operating position (O) in which said support unit (11) is laterally extended for supporting, receiving and allowing a heat-sealing operation on said packaging film (F) at the end of packaging of said pallet (P), characterized in that said blocking device (10) further comprises: -a support structure (25) of the support unit (11), and -Moving means configured to move the support unit (11) with respect to the support structure (25) along a movement direction (D1) in order to move the blocking lever element (14) from a maximum protruding position (MP) of the tray (P) to a maximum retracted position (MR) with respect to the tray (P), The movement device comprises a lever device connected to each other, having a movement end (30) connected to the support unit (11) and a fixed end (31) connected to the support structure (25), the movement device further comprising a first driver (16) arranged to operate the lever device and connected to the support structure (25) at a first end (32) and to the lever device at a second end (33), wherein the first driver (16) is configured to exert a pulling and pushing action on the lever device along an operation direction (D2) arranged transversally to the movement direction (D1); -said support unit (11) being connected to a track device (15) adapted to slide in a slider device (24) arranged on said support structure (25) to guide the movement of said support unit (11) along said movement direction (D1) with the blocking lever element (14) approaching or moving away from said tray (P), said support unit (11) being slidable along said movement direction (D1) from a maximum extended position (MP) of said tray (P) to a maximum retracted position (MR) with respect to said tray (P); The rail means (15) have stop means (23) to stop the sliding of the rail means (15) in the slider means (24) when the support unit (11) reaches the maximum extension position (MP); The blocking lever element (14) is configured to rotate about an axis (A1) parallel to the movement direction (D1), rotating from the extended operating position (O) to the rest position (R1, R2) along a first rotation direction (R1) or a second rotation direction (R2), so as to move at the end of the heat-sealing operation along a direction substantially coinciding with the advancing direction of the tray (P); -said support unit (11) has a box-like housing (34), inside which a rack (28) is placed, connected to said blocking lever element (14) by means of a gear (35), to allow said blocking lever element (14) to move from said retracted rest position to said extended operating position (O); Comprising a second actuator (36) arranged to move said rack (28) linearly, said blocking rod element (14) being removable with respect to said gear wheel (35) to change its position with respect to said rack (28), altering the movement of said rest position in which it is drawn from said extended operating position (O), said blocking rod element (14) being configurable to move on said support unit (11) towards said rest position in which it is extended as an extended end of said support unit (11), said lever means and said first actuator (16) extending substantially on the same horizontal plane (O) and being movable to bring said support unit (11) from said maximum extended position (MP) to said maximum retracted position (MR) in which said lever means and said first actuator (16) are oriented to reduce the size of said first shaft (17) to said second shaft (17) by means of said first shaft (17), said lever means (17) being connected to one another by said second shaft (17) in a direction parallel to said direction of movement (D1), the second lever (18) is connected to the support structure (25) at the fixed end (31) by a third shaft means (20), at the second end (33) by a fourth shaft means (21) to the first driver (16), the fourth shaft means (21) being located closer to the third shaft means (20) than the first shaft means (22), the first driver (16), the first lever (17) and the second lever (18) being arranged vertically in sequence from low to high, the fourth shaft means (21) being arranged between the first driver (16) and the first lever (17), the first shaft means (22) being arranged between the first lever (17) and the second lever (18), the first driver (16) being connected to the support structure (25) at the first end (32) by a fifth shaft means (27); The support structure (25) is connected to a third drive (12, 13) which allows the support structure (25) and thus the support unit (11) to move along a direction (D3) perpendicular to the horizontal plane (o) and thus to the direction of movement (D1) to allow a telescopic movement of the support unit (11) under the tray (P).
  2. 2. Blocking device (10) according to claim 1, wherein the third actuator (12, 13) is selected among devices comprising a hydraulic actuator cylinder, a pneumatic actuator cylinder, an electric actuator cylinder.
  3. 3. The blocking device (10) according to claim 1, wherein the second actuator (36) is selected among devices comprising a hydraulic actuator cylinder, a pneumatic actuator cylinder, an electric actuator cylinder.
  4. 4. Blocking device (10) according to any of the preceding claims, wherein the first actuator (16) is selected among devices comprising a hydraulic actuator cylinder, a pneumatic actuator cylinder, an electric actuator cylinder.
  5. 5. A blocking device (10) according to claim 1, wherein the blocking lever element (14) has a recessed area (29) adapted to provide a normal support surface for the heat-sealing element in the wrapping machine (a) during the heat-sealing operation of the packaging film (F).

Description

Barrier device Technical Field The present invention relates to a blocking device for heat-sealing packaging films, intended to be mounted on wrapping machines, in particular on wrapping machines for packaging pallets. Background It is known to store and transport goods using pallets. In addition, it is also known to use a pallet wrapping machine, to wrap a pallet and goods placed thereon with stretch film, to stabilize the pallet and goods as a whole, making transportation and/or storage easier to manage. In particular, automatic winding machines are commonly used in automated production lines, placed at the end of the line in order to automatically package the goods, and cut the edges of the film, the so-called film tails, at the end of the packaging, and then weld or fix them to the underlying film layer of the goods. The welding of the edges of the film, more precisely the heat sealing of the edges of the film, can be carried out in direct contact with the packaged goods (in which case the heat sealing elements in the wrapping machine can be pressed directly against the goods packaged with the film), or with the use of a telescopic blocking rod placed between the last film applied to the goods and the last film or films, in other words the last film of the package, against the blocking rod. In this way the heat sealing element can be pressed against the telescopic barrier rod and interact only with the film layer which is also wound around the barrier rod, i.e. only with the film layer which is required for effective welding. The second solution is particularly advantageous, for example, when the surface of the goods is too irregular to be welded in direct contact, or in the case where it is necessary to avoid any contact with the product on the pallet, to ensure that the goods are not damaged. In particular, when there is a blocking lever, the blocking lever is equipped with a blocking device that manages the engagement and disengagement of the blocking lever, however, current blocking devices generally have complex movement characteristics, which can lead to large dimensions, compromising the effectiveness and ease of use of the blocking device. In addition, in the event that the shape and/or condition of the cargo impedes removal of the blocking lever, disengagement of the blocking lever may be complicated, thus reducing versatility of the pallet winder itself. It is therefore desirable to improve the blocking devices currently used for packaging films, and therefore to improve the current automatic pallet winding machines, to ensure a strong versatility, a small size and a simple movement profile. Disclosure of Invention It is an object of the present invention to provide a barrier device that is versatile. It is a further object of the invention to provide a blocking device that is small in size. It is a further object of the invention to provide a blocking device in which the assembly is movable according to simplified movement characteristics. An advantage of the present invention is to provide a blocking device that is easily disengaged from the goods at the end of the heat sealing operation. The objects and advantages of the present invention are achieved by a blocking device as defined in the present invention. Drawings The drawings are included to provide a further understanding of the invention and are not to be construed as limiting the practice of the invention. Fig. 1 is a schematic view illustrating a structure of a barrier device on which a packaging film to be heat-sealed is placed according to the present invention; FIG. 2 is a top view of the device of FIG. 1, shown in a maximum extended position (double dashed line) and a maximum retracted position (solid line); FIG. 3 is a schematic view of the apparatus of FIG. 1, showing an operating position (double dashed line) and a first rest position (solid line); FIG. 4 is a schematic view of the apparatus of FIG. 1, showing the operational position of FIG. 3 (double dashed line) and a second rest position (solid line); FIG. 5 is a side view of FIG. 3; FIG. 6 is a side view of the apparatus of FIG. 1, illustrating the position after being mounted on the pallet winder for telescopic movement under the pallet; FIG. 7 is a schematic view of the apparatus of FIG. 1 mounted on a pallet winder in engagement with a pallet; FIG. 8 is a top view of the device of FIG. 1 mounted on a pallet winder in a maximally retracted position; fig. 9 is a partial side view of a portion of the device of fig. 1. Detailed Description The general features of the invention are described in detail below by way of example, but are not to be construed as limiting the practice of the invention. Referring to the drawings, there is shown a blocking device 10 intended to be mounted on a wrapping machine a for wrapping film F, and in particular on a wrapping machine a for wrapping trays P, as can be seen in fig. 7. Referring to fig. 1, the blocking device 10 provides a blocki