Conveying and discharging device for coiled plastic bags

Abstract

The invention discloses a coiled plastic bag conveying and discharging device which comprises a positioning rod, a push plate and a material receiving base. Wherein the positioning rod is used for sleeving a coiled plastic bag; the push plate is arranged at the telescopic end of the first telescopic driving rod, and in the moving process, the push plate can abut against the end, facing the push plate, of the rolled plastic bag so as to drive the rolled plastic bag to be separated from the positioning rod; the material receiving seat is arranged right below the tail end of the positioning rod so as to receive the dropped coiled plastic bags; a bearing face, used for bearing coiled plastic bags, in the material receiving base is formed by hinging a fixed supporting plate and a movable supporting plate, and the telescopic end of the second telescopic driving rod is hinged to the movable supporting plate, so that the movable supporting plate can rotate along a hinge shaft. The movable supporting plate is arranged in the V-shaped structure, so that the bearing face can be switched between the V-shaped structure and the linear structure inclining downwards towards one end of the movable supporting plate, the movable supporting plate is arranged in the opposite direction relative to the winding direction of the rolled plastic bag, and the rolled plastic bag cannot be scattered in the rolling process and is kept in the rolled state all the time.

Description

Technical Field

[0001] This invention relates to the field of plastic bag processing technology, and more specifically to a roll plastic bag conveying and unloading device. Background Technology

[0002] In existing technologies, the production process of plastic bags involves multiple steps, including extrusion bag making, winding into rolls, unloading and transfer, and packaging and storage. Among these, the winding machine, as a key upstream device, winds continuously produced plastic bags into rolls of a fixed specification, which are then mounted on a dedicated positioning rod (or mandrel) on the equipment. The rolls of plastic bags must be removed from the winding machine before they can be stored or processed in subsequent lines (such as printing or cutting).

[0003] Currently, the feeding of rolls of plastic bags mainly relies on two methods, both of which have significant technical limitations: Firstly, in small and medium-sized production scenarios, manual operation is still the main method; operators need to manually remove the rolled plastic bags that are attached to the positioning rod (or similar support structure).

[0004] Secondly, some large-scale production scenarios have adopted simple mechanical feeding devices. After the rolled plastic bags are pushed off the positioning rod by external mechanical parts, they fall directly to the receiving component. The rolled plastic bags will roll on the receiving component, causing some of the rolled plastic bags to unravel. It is necessary to manually wind the unraveled plastic bags back into a roll. In summary, existing methods for unloading rolled plastic bags require manual intervention to ensure that the bags remain rolled throughout the unloading process, or that manual re-rolling is required after mechanical unloading, which affects unloading efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a roll plastic bag conveying and unloading device to solve the technical problem in the prior art that the roll plastic bag unloading method requires manual intervention to keep the roll plastic bags in a rolled state.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A roll-of-plastic bag conveying and unloading device includes: a positioning rod, arranged horizontally, for attaching the roll of plastic bag; a push plate, disposed at the telescopic end of a first telescopic drive rod, the first telescopic drive rod being arranged parallel to the positioning rod, the push plate being able to abut against the end of the roll of plastic bag facing the push plate during linear motion driven by the first telescopic drive rod, thereby causing the roll of plastic bag to detach from the positioning rod; and a receiving seat, disposed directly below the end of the positioning rod, for receiving the roll of plastic bag falling from the positioning rod; wherein the receiving surface of the receiving seat for receiving the roll of plastic bag is formed by hinged connection of a fixed support plate and a movable support plate. Furthermore, the hinge axis between the fixed support plate and the movable support plate is arranged in the same direction as the positioning rod. The fixed support plate is fixedly connected to the receiving seat. The receiving seat is provided with a second telescopic drive rod. The telescopic end of the second telescopic drive rod is hinged to the movable support plate, so that the movable support plate can rotate along the hinge axis, allowing the receiving surface to switch between a V-shaped structure and a straight structure that tilts downward toward one end of the movable support plate. The movable support plate is arranged in the opposite direction to the winding direction of the rolled plastic bag. A feeding platform is used to set the receiving seat. A support frame is set on the feeding platform, and the support frame is used to set the positioning rod and the first telescopic drive rod.

[0007] Furthermore, the receiving seat includes a base plate, and a mounting plate is vertically arranged on each side of the base plate along the axial direction of the positioning rod. The fixed support plate is inclinedly arranged between the two mounting plates along the axial direction of the positioning rod, and the hinge axis between the fixed support plate and the movable support plate is located at the lower position. The second telescopic drive rod is mounted on the base plate.

[0008] Furthermore, the mounting plate on the side of the receiving seat away from the positioning rod extends upward to form a baffle.

[0009] Furthermore, multiple positioning rods are provided; the multiple positioning rods are arranged in a circle around the geometric center point of the turntable; a first motor is arranged horizontally on the support frame, and the rotation shaft of the first motor is connected to the geometric center point of the turntable; and the push plate will not obstruct the movement of the positioning rods.

[0010] Furthermore, the plurality of positioning rods are evenly spaced around the geometric center of the turntable; the angle by which the first motor drives the turntable to rotate each time is the included angle between two adjacent positioning rods.

[0011] Furthermore, an auxiliary push plate is provided on the push plate along a plane perpendicular to the positioning rod. The end of the auxiliary push plate facing the positioning rod has an overlapping portion that overlaps with the rotation path of the positioning rod. The width of the overlapping portion is between the radius and diameter of the positioning rod, and a groove is formed on the overlapping portion that can engage with the positioning rod. The auxiliary push plate is rotatably connected to the push plate. A positioning block is provided on the push plate perpendicular to the plane of the auxiliary push plate, and the positioning block is located on the side opposite to the rotation direction of the turntable relative to the auxiliary push plate. A pull ring is provided on the side of the auxiliary push plate facing the positioning block, and a tension spring is provided between the pull ring and the positioning block.

[0012] Furthermore, the plane of the auxiliary push plate is provided with an arc-shaped groove centered on the geometric center point of the turntable. The auxiliary push plate is provided with a slider that can slide along the arc-shaped groove. The arc-shaped groove and the spring are configured such that when the slider abuts against the end of the arc-shaped groove facing the positioning block, the tension spring can apply a pulling force to the auxiliary push plate to rotate toward the positioning block, and the groove is precisely engaged with the positioning rod.

[0013] Furthermore, the unloading platform is provided with a unloading slide, which is inclined downwards and located on the side of the receiving seat near the movable support plate. The inlet end of the unloading slide is located directly below the movable support plate on one side of the receiving seat, and the outlet end of the unloading slide is provided with a material stop.

[0014] Furthermore, the feeding platform is provided with a feeding chute, which is inclined downwards and the inlet end of the feeding chute is located below the horizontal plane of the movable support plate. The outlet end of the feeding chute is provided with a material stop. A second motor is vertically arranged on the feeding platform, and the rotation shaft of the second motor is vertically connected to the base plate, so that one side of the movable support plate in the receiving seat can rotate to be located directly above the inlet end of the feeding chute.

[0015] Compared with the prior art, the present invention has the following advantages: The roll plastic bag conveying and unloading device provided by the present invention pushes the roll plastic bag, which is sleeved on the positioning rod, to detach from the positioning rod and fall onto the receiving seat. The receiving seat is formed by hinged fixed support plate and movable support plate, so that the receiving surface can switch between a V-shaped structure and a straight structure that tilts downward towards one end of the movable support plate, so that the roll plastic bag can roll down from the receiving seat to the picking point.

[0016] Furthermore, the movable support plate is set in the opposite direction to the winding direction of the rolled plastic bag, so that the rolling direction of the rolled plastic bag is opposite to its own winding direction, so that the rolled plastic bag will not unravel during the rolling process and will always remain rolled up. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 A schematic diagram of a roll-of-plastic-bag conveying and unloading device; Figure 2 A schematic diagram of the rear structure of the roll plastic bag conveying and unloading device; Figure 3 A schematic diagram of a combination of a roll plastic bag conveying and unloading device and a winding and rolling machine; Figure 4 This is a schematic diagram of the structure in the pusher plate pushing state; Figure 5 This is a schematic diagram of the push plate structure; Figure 6 This is a schematic diagram of the structure of the receiving seat that needs to rotate; Figure 7 This is a schematic diagram of a receiving base with a rotating function.

[0019] The labels in the diagram represent the following: 1-Positioning rod, 11-Turntable, 12-Support frame, 13-Base, 14-First motor 2-Push plate, 21-First telescopic drive rod, 22-Guide rod 3-Receiving base, 31-Base plate, 32-Fixed support plate, 33-Modible support plate, 34-Mounting plate, 35-Baffle, 36-Second telescopic drive rod, 37-Second motor 4- Feeding platform, 41- Support frame 5-Auxiliary push plate, 51-Groove, 52-Positioning block, 53-Tension spring, 54-Arc-shaped slide groove 6-Discharge chute, 61-Blocking component. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 and Figure 2 As shown, the present invention provides a specific embodiment of a roll plastic bag conveying and unloading device. The device mainly uses a pusher plate 2 to push the roll plastic bag, which is attached to the positioning rod 1, away from the positioning rod 1 and falls onto the receiving seat 3. The receiving seat 3 has a receiving surface that can switch between a V-shaped structure and a straight structure that tilts downwards towards one end of the movable support plate 33, facilitating the roll plastic bag to roll down from the receiving seat 3 to the unloading point. Furthermore, the rolling direction of the roll plastic bag is opposite to its winding direction, ensuring that the roll plastic bag does not unravel during rolling and remains rolled up.

[0022] In this invention, the roll plastic bag conveying and unloading device can be used independently or combined with a winding and rolling machine to form an automated operation, thereby improving efficiency; in this embodiment, such as Figure 3 As shown, the roll plastic bag conveying and unloading device is located at the end of the winding and rolling machine.

[0023] The positioning rod 1 is a core shaft used in the winding machine to roll up plastic bags. The positioning rod 1 is set in the horizontal direction. After the plastic bag is wound into a roll on its surface, the rolled plastic bag is attached to the positioning rod 1 and can enter the unloading process without being transferred.

[0024] Specifically, the positioning rod 1 provides axial support for the rolled plastic bag, ensuring that the rolled plastic bag remains stably fitted before being pushed by the pusher plate 2; the horizontal setting of the positioning rod 1, in conjunction with the axial pushing of the pusher plate 2, allows the rolled plastic bag to detach horizontally, reducing shaking during the detachment process.

[0025] The push plate 2 is located at the telescopic end of the first telescopic drive rod 21, which is set along the direction parallel to the positioning rod 1 to ensure that the pushing direction of the push plate 2 is consistent with the direction of the roll of plastic bag detachment.

[0026] Specifically, the first telescopic drive rod 21 can be a cylinder or an electric push rod, with the stroke accuracy controlled within ±1mm. After the winding machine finishes winding a roll of plastic bag, the push plate 2, driven by the first telescopic drive rod 21 and moving in a straight line, can abut against the end of the rolled plastic bag. By continuously applying axial force, the rolled plastic bag can slide smoothly out and detach along the positioning rod 1.

[0027] The receiving seat 3 is located directly below the end of the positioning rod 1 to receive the rolled plastic bags that fall from the positioning rod 1; when used in conjunction with a winding machine, the receiving seat 3 is located on the other side of the winding machine's conveyor belt.

[0028] Specifically, the receiving surface of the receiving seat 3 for receiving rolled plastic bags is formed by hinged connection of fixed support plate 32 and movable support plate 33, and the hinge axis between the fixed support plate 32 and movable support plate 33 is set in the same direction as the positioning rod 1.

[0029] Furthermore, the hinge axis between the fixed support plate 32 and the movable support plate 33 is in the same vertical plane as the positioning rod 1.

[0030] As shown in the figure, the fixed support plate 32 is fixedly connected to the receiving seat 3. The receiving seat 3 is provided with a second telescopic drive rod 36. The telescopic end of the second telescopic drive rod 36 is hinged to the movable support plate 33, so that the movable support plate 33 can rotate along the hinge axis, so that the receiving surface can switch between a V-shaped structure and a straight structure that tilts downward towards one end of the movable support plate 33.

[0031] When the receiving surface is switched to a V-shaped structure: the movable support plate 33 and the fixed support plate 32 form a V-shaped groove at an angle of 30°-60°; when the rolled plastic bag falls off the positioning rod 1, the V-shaped structure can automatically correct the posture of the rolled plastic bag through the constraint of the support plates on both sides, prevent the rolled plastic bag from rolling and shifting, and solve the problem that the rolled plastic bag is easy to tip over when receiving materials on a traditional flat plate.

[0032] When the receiving surface is switched to a straight structure: the movable support plate 33 rotates to be flush with the fixed support plate 32, and the whole is tilted towards one end of the movable support plate 33 at an angle of 5°-15° to form a smooth downward channel, so that the rolled plastic bag slides towards the material picking station in a predetermined direction.

[0033] The movable support plate 33 is set in the opposite direction to the winding direction of the rolled plastic bag, so that the rolling direction of the rolled plastic bag is opposite to its own winding direction, so that the rolled plastic bag will not unravel during the rolling process and will always remain rolled up.

[0034] The receiving seat 3 is set on the unloading platform 4, and a support frame 41 is vertically set on the unloading platform 4. The positioning rod 1 and the first telescopic drive rod 21 are both set on the support frame 41.

[0035] Furthermore, the support frame 41 has a guide hole along the direction parallel to the first telescopic drive rod 21, and the push plate 2 has a guide rod 22 perpendicularly provided on the side facing the support frame 41. The guide rod 22 is fitted with the guide hole with a clearance, so that the guide rod 22 slides along the guide hole, thereby improving the stability of the push plate 2 pushing the rolled plastic bag.

[0036] In this embodiment, the feeding platform 4 is an extension of the table of the winding machine.

[0037] When this device is combined with a winding machine, the collaborative workflow is as follows: Winding complete: The winding machine completes the winding of the plastic bag on the mandrel of the positioning rod 1, forming a roll of plastic bag with uniform specifications. The roll of plastic bag is tightly fitted onto the positioning rod 1.

[0038] Pushing and disengaging: The first telescopic drive rod 21 is activated, the push plate 2 moves axially and abuts against the end face of the rolled plastic bag, and continues to push so that the rolled plastic bag can be smoothly disengaged along the positioning rod 1 until it is completely separated from the positioning rod 1.

[0039] V-shaped receiving: After the rolled plastic bag is released, it falls vertically to the receiving seat 3. At this time, the receiving surface is in a V-shaped structure. The posture of the rolled plastic bag is constrained and corrected by the support plates on both sides to ensure that the axis of the rolled plastic bag is parallel to the hinge axis.

[0040] Switching to unloading: The second telescopic drive rod 36 extends, driving the movable support plate 33 to rotate, so that the receiving surface switches to a straight structure that is inclined towards one end of the movable support plate 33. The rolled plastic bag slides smoothly along the receiving surface to the material picking station and enters the subsequent storage or processing process.

[0041] Reset and waiting for materials: The first and second telescopic drive rods 36 are reset, the push plate 2 returns to the initial position, the receiving surface restores the V-shaped structure, and the above process is repeated after the next roll of plastic bag is finished winding.

[0042] This embodiment provides a specific implementation of the receiving base 3.

[0043] The receiving seat 3 includes a base plate 31, with a mounting plate 34 vertically arranged on each side of the base plate 31 along the axial direction of the positioning rod 1. A fixed support plate 32 is inclinedly arranged between the two mounting plates 34 along the axial direction of the positioning rod 1, and the hinge shaft between the fixed support plate 32 and the movable support plate 33 is located at the lower position; the second telescopic drive rod 36 is arranged on the base plate 31.

[0044] Specifically, the base plate 31 serves as the bottom support structure of the receiving seat 3 and is in the shape of a rectangular flat plate.

[0045] The distance between the two mounting plates 34 is 30-50mm larger than the axial length of the rolled plastic bag, leaving enough space for receiving the rolled plastic bag.

[0046] The fixed support plate 32 is welded and fixed between the two mounting plates 34; a 1-2mm thick rubber pad can be pasted on the upper surface of the fixed support plate 32 to cushion the fall of the rolled plastic bags through the elasticity of the rubber.

[0047] Furthermore, the mounting plate 34 on the side of the receiving seat 3 away from the positioning rod 1 extends upward to form a baffle 35, which limits the roll of plastic bag falling onto the receiving surface to prevent the roll of plastic bag from falling off the receiving seat.

[0048] This embodiment provides the following examples for the positioning rod 1.

[0049] Since this device is used in conjunction with a winding machine, a conventional winding machine is equipped with multiple core shafts, which are driven to rotate by a turntable 11.

[0050] Therefore, in this embodiment, multiple positioning rods 1 are provided; multiple positioning rods 1 are arranged in a circle around the geometric center point of the turntable 11; a first motor 14 is arranged on the support frame 41 in the horizontal direction, and the rotation shaft of the first motor 14 is connected to the geometric center point of the turntable 11.

[0051] Specifically, such as Figure 3 As shown, in this embodiment, four positioning rods 1 are set. During the rotation of the turntable 11, each positioning rod 1 sequentially enters different work stations: the winding work station, which connects with the winding mechanism of the winding machine to complete the winding of the plastic bag; the transition work station, which waits for the material to be unloaded; the unloading work station, which aligns with the push plate 2 and the receiving seat 3 to complete the unloading and receiving of the rolled plastic bag; and the preparation work station, which is empty and waits for the next round of winding. This allows the winding and unloading processes to be carried out simultaneously, reducing waiting time and improving efficiency.

[0052] Furthermore, the push plate 2 will not obstruct the movement of the positioning rod 1.

[0053] Specifically, the push plate 2 and the first telescopic drive rod 21 are installed on the side of the unloading station. Their initial position maintains a safe distance of 20-50mm from the circumferential trajectory of the turntable 11, ensuring that the push plate 2 will not collide with the positioning rod 1 when the turntable 11 drives the positioning rod 1 to rotate.

[0054] In this embodiment, during the process of pushing the rolled plastic bag, the pusher plate 2 only comes into partial contact with the end face of the rolled plastic bag, resulting in uneven pushing force received by the rolled plastic bag. This causes the contact surface between the rolled plastic bag and the pusher plate 2 to rub against each other during the process of the rolled plastic bag separating from the positioning rod 1, resulting in wear and tear on the plastic bag.

[0055] To avoid the aforementioned problems, this implementation also provides the following embodiments.

[0056] An auxiliary push plate 5 is provided on the push plate 2 along the plane of the vertical positioning rod 1. The end of the auxiliary push plate 5 facing the positioning rod 1 has an overlapping part that overlaps with the rotation path of the positioning rod 1; and a groove 51 that can engage with the positioning rod 1 is opened on the overlapping part.

[0057] By expanding the contact area between the auxiliary pusher plate 5 and the end face of the rolled plastic bag, the pushing force of the pusher plate 2 is evenly applied to the end face of the rolled plastic bag.

[0058] In order to avoid interference with the rotation of the positioning rod 1 caused by the overlapping part, in this embodiment...

[0059] The auxiliary push plate 5 is rotatably connected to the push plate 2. The plane on the push plate 2 where the auxiliary push plate 5 is set is vertically provided with a positioning block 52. The positioning block 52 is located on the side opposite to the rotation direction of the turntable 11 relative to the auxiliary push plate 5. A pull ring is provided on the side of the auxiliary push plate 5 facing the positioning block 52. A tension spring 53 is provided between the pull ring and the positioning block 52.

[0060] Specifically, the tension spring 53 adopts a hook design at both ends, with one end hooked to the pull ring of the auxiliary push plate 5 and the other end hooked to the reserved hanging hole of the positioning block 52.

[0061] After the positioning rod 1 at the unloading station completes unloading, the turntable 11 rotates. The positioning rod 1 at the unloading station will push the auxiliary push plate 5 to rotate and avoid the tension of the tension spring 53 until the positioning rod 1 and the auxiliary push plate 5 are separated. The tension spring 53 pulls the auxiliary push plate 5 to rotate in the opposite direction through the contraction force, so that it quickly rotates back to the unloading station. The positioning rod 1 at the transition station will rotate synchronously and is about to enter the unloading station. The positioning rod 1 will push the auxiliary push plate 5 to rotate and avoid the tension of the tension spring 53. After the positioning rod 1 rotates to the unloading station, it stops rotating. Under the action of the tension spring 53, the groove 51 of the overlapping part of the auxiliary push plate 5 is just enough to make the positioning rod 1 engage.

[0062] The width of the overlapping part is between the radius and diameter of the positioning rod 1. This size design can both ensure that the contact area with the end face of the rolled plastic bag is increased, and prevent the groove 51 of the auxiliary push plate 5 from failing to engage with the positioning rod 1 due to excessive width.

[0063] Furthermore, the plane of the auxiliary push plate 5 on the push plate 2 is provided with an arc-shaped groove 54 centered on the geometric center point of the turntable 11, and the auxiliary push plate 5 is provided with a slider (not shown in the figure) that can slide along the arc-shaped groove 54.

[0064] Furthermore, the arc-shaped slide 54 and the spring are configured such that when the slider abuts against the end of the arc-shaped slide 54 toward the positioning block 52, the tension spring 53 can apply a pulling force to the auxiliary push plate 5 to rotate toward the positioning block 52, and the groove 51 is just engaged with the positioning rod 1.

[0065] To avoid the large friction between the groove 51 and the positioning rod 1 due to the tension of the tension spring 53, which would cause the groove 51 to rub against the side wall of the positioning rod 1 when the auxiliary push plate 5 pushes the rolled plastic bag.

[0066] In view of the following embodiments after the rolled plastic bags roll off the receiving seat 3, this embodiment also provides the following examples.

[0067] The unloading platform 4 is provided with an unloading slide 6. The unloading slide 6 is inclined downward and is located on the side of the receiving seat 3 near the movable support plate 33. The inlet end of the unloading slide 6 is located directly below the movable support plate 33 on one side of the receiving seat 3.

[0068] Specifically, the slide is inclined downwards along the direction from the receiving seat 3 to the picking station, with the inclination angle controlled between 8° and 15°. This angle range is the optimal range that balances rolling speed and stability.

[0069] A baffle 61 is provided at the discharge end of the feeding chute 6 to prevent the roll from sliding out and to keep the rolled plastic bags in an orderly manner on the feeding chute 6, waiting for the next process.

[0070] Furthermore, based on the rational layout of the workshop, it is preferable that the unloading slide 6 is located on the side of the receiving seat 3 that is not close to the movable support plate 33; then the unloading platform 4 is vertically equipped with a second motor 37, and the rotation shaft of the second motor 37 is vertically connected to the base plate 31, so that one side of the movable support plate 33 in the receiving seat 3 can rotate to be located directly above the inlet end of the unloading slide 6.

[0071] Furthermore, a base 13 is provided on the unloading platform 4, and the second motor 37 is located inside the base 13.

[0072] Specifically, when receiving rolled plastic bags, the receiving seat 3 keeps the hinge axis between the fixed support plate 32 and the movable support plate 33 in the same vertical plane as the positioning rod 1, and the movable support plate 33 is set in the opposite direction to the winding direction of the rolled plastic bags. After receiving the rolled plastic bags, the second motor 37 drives the receiving seat 3 to rotate, so that one side of the movable support plate 33 in the receiving seat 3 can rotate to be directly above the inlet end of the unloading slide 6. Then, the second telescopic drive rod 36 drives the receiving surface to switch to a straight plane structure, so that the rolled plastic bags roll to the unloading slide 6.

[0073] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A roll-type plastic bag conveying and unloading device, characterized in that, include: Positioning rod (1) is set in the horizontal direction and is used to loop plastic bags into rolls; A push plate (2) is provided at the telescopic end of the first telescopic drive rod (21). The first telescopic drive rod (21) is provided in a direction parallel to the positioning rod (1). When the push plate (2) is driven by the first telescopic drive rod (21) and moves in a straight line, it can abut against the end of the rolled plastic bag facing the push plate (2) to drive the rolled plastic bag to detach from the positioning rod (1). A receiving seat (3) is located directly below the end of the positioning rod (1) to receive the rolled plastic bag that falls from the positioning rod (1); The receiving surface of the receiving seat (3) for receiving the rolled plastic bag is formed by hinged connection of a fixed support plate (32) and a movable support plate (33). The hinge axis between the fixed support plate (32) and the movable support plate (33) is set in the same direction as the positioning rod (1). The fixed support plate (32) is fixedly connected to the receiving seat (3). A second telescopic drive rod (36) is provided inside the receiving seat (3). The telescopic end of the second telescopic drive rod (36) is hinged to the movable support plate (33), so that the movable support plate (33) can rotate along the hinge axis, so that the receiving surface can switch between a V-shaped structure and a straight structure that is inclined downward towards one end of the movable support plate (33). The movable support plate (33) is set in the opposite direction to the winding direction of the rolled plastic bag. The unloading platform (4) is used to set the receiving seat (3). The unloading platform (4) is provided with a support frame (41). The support frame (41) is used to set the positioning rod (1) and the first telescopic drive rod (21).

2. The roll-type plastic bag conveying and unloading device according to claim 1, characterized in that, The receiving seat (3) includes a base plate (31), and a mounting plate (34) is vertically arranged on each side of the base plate (31) along the axial direction of the positioning rod (1). The fixed support plate (32) is inclinedly arranged between the two mounting plates (34) along the axial direction of the positioning rod (1), and the hinge axis between the fixed support plate (32) and the movable support plate (33) is located at the lower position. The second telescopic drive rod (36) is mounted on the base plate (31).

3. The roll plastic bag conveying and unloading device according to claim 2, characterized in that, The mounting plate (34) on the side of the receiving seat (3) away from the positioning rod (1) extends upward to form a baffle (35).

4. The roll plastic bag conveying and unloading device according to claim 1, characterized in that, The positioning rod (1) is provided in multiple ways; the multiple positioning rods (1) are arranged in a circle around the geometric center point of the turntable (11); a first motor (14) is provided on the support frame (41) in the horizontal direction, and the rotation shaft of the first motor (14) is connected to the geometric center point of the turntable (11). Furthermore, the push plate (2) will not obstruct the movement of the positioning rod (1).

5. The roll-type plastic bag conveying and unloading device according to claim 4, characterized in that, The multiple positioning rods (1) are distributed at equal intervals around the geometric center of the turntable (11); The first motor (14) drives the turntable (11) to rotate by the included angle between two adjacent positioning rods (1) each time.

6. The roll plastic bag conveying and unloading device according to claim 5, characterized in that, An auxiliary push plate (5) is provided on the push plate (2) along a plane perpendicular to the positioning rod (1). The end of the auxiliary push plate (5) facing the positioning rod (1) has an overlapping part that overlaps with the rotation path of the positioning rod (1). The width of the overlapping part is between the radius and the diameter of the positioning rod (1), and a groove (51) is provided on the overlapping part that can engage with the positioning rod (1). The auxiliary push plate (5) is rotatably connected to the push plate (2). A positioning block (52) is provided on the plane of the auxiliary push plate (5) on the push plate (2) perpendicular to the plane of the auxiliary push plate (5). The positioning block (52) is located on the side opposite to the rotation direction of the turntable (11) relative to the auxiliary push plate (5). A pull ring is provided on the side of the auxiliary push plate (5) facing the positioning block (52). A tension spring (53) is provided between the pull ring and the positioning block (52).

7. The roll plastic bag conveying and unloading device according to claim 6, characterized in that, The plane of the auxiliary push plate (5) on the push plate (2) is provided with an arc-shaped groove (54) centered on the geometric center point of the turntable (11). The auxiliary push plate (5) is provided with a slider that can slide along the arc-shaped groove (54). The arc-shaped groove (54) and the spring are configured such that when the slider abuts against the end of the arc-shaped groove (54) toward the positioning block (52), the tension spring (53) can apply a pulling force to the auxiliary push plate (5) to rotate toward the positioning block (52), and the groove (51) is just engaged with the positioning rod (1).

8. The roll plastic bag conveying and unloading device according to claim 1, characterized in that, The feeding platform (4) is provided with a feeding slide (6), which is inclined downward on the side of the receiving seat (3) near the movable support plate (33). The feeding end of the feeding slide (6) is located directly below the side of the movable support plate (33) in the receiving seat (3). The discharging end of the feeding slide (6) is provided with a material stop (61).

9. The roll plastic bag conveying and unloading device according to claim 1, characterized in that, The feeding platform (4) is provided with a feeding slide (6), which is inclined downwards. The feeding end of the feeding slide (6) is located below the horizontal plane of the movable support plate (33), and the discharging end of the feeding slide (6) is provided with a baffle (61). A second motor (37) is vertically installed on the unloading platform (4). The rotating shaft of the second motor (37) is vertically connected to the base plate (31), so that one side of the movable support plate (33) in the receiving seat (3) can rotate to be directly above the inlet end of the unloading slide (6).

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