Device for collecting and transferring stacked express packaging bag finished products

Abstract

The invention discloses a bundling and transferring device for stacked express packaging bag finished products in the field of packaging bag transportation, and the bundling and transferring device comprises a conveying belt, a folding notch, a strip-shaped carrier, a strip-shaped pressing rod and a belt winding mechanism, the folding notch is formed in the tail end of the conveying belt, and the strip-shaped carrier is used for bearing the bottom of the center line of a pre-stacked body and can ascend and descend; the pre-stacked body is folded to form a stacked body in the process of descending to pass through the folding notch, the lifting driving mechanism drives the strip-shaped pressing rod and the strip-shaped carrier to clamp the pre-stacked body and synchronously descend to the adhesive tape winding position of the tape winding mechanism, and the tape winding mechanism conducts adhesive tape winding and bundling on the clamped stacked body. According to the device, automatic operation from centering folding, pressing and positioning to adhesive tape winding and bundling of materials is achieved.

Description

Technical Field

[0001] This invention relates to the field of packaging bag transportation, and more specifically to a device for collecting and transferring finished express packaging bags after stacking. Background Technology

[0002] At the end of the continuous production line for thin film express bags, the continuous express bags need to be slit, sealed, and heat-sealed to form independent finished express bags with predetermined dimensions.

[0003] In highly automated modern plastic bag production lines, after the finished express delivery bags are cut, they are usually stacked into a certain number of stacks by automated equipment. Then, the sides are folded by a preceding automated device to form a pre-stacked body with a reduced width. Subsequently, these pre-stacked bodies are transferred to the next process for final folding and gathering.

[0004] While some aspects of traditional post-processing have been automated, the crucial final centering fold (half-fold) and bundling still often rely on manual labor. Specifically, workers need to organize the pre-stacked bags that have already undergone side folding and complete the final centering fold to further reduce volume and facilitate transportation.

[0005] Taking a common folding method as an example, after the pre-folded bag is folded in half again, its final width will be about one-sixth of the original bag width, significantly reducing its volume. After folding, workers also need to use a binding mechanism, such as tape, to tie and secure the folded bag stack to prevent it from loosening.

[0006] In the aforementioned manual final folding and subsequent bundling of the pre-stacked materials, the low efficiency and inherent instability of manual processing, involving multiple actions such as material handling, folding, and bundling, have become major bottlenecks restricting the overall production line's capacity improvement. Given the increasing demands for automation and efficiency in the logistics and packaging industries, there is an urgent need to transform this process from labor-intensive to automated. Summary of the Invention

[0007] The purpose of this invention is to provide a device for collecting and transferring finished express packaging bags after stacking, so as to solve the problem that the final centering folding and collecting of pre-stacked packaging bags in the prior art mainly relies on manual operation, resulting in low production efficiency and instability.

[0008] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A device for collecting and transferring stacked finished express packaging bags, comprising: A conveyor belt is used to transport a pre-stacked body of packaging bags that has undergone two side folds. The conveying direction of the conveyor belt is parallel to the folding direction of the pre-stacked body. At the end of the conveyor belt, a folding notch is formed to allow the pre-stacked body to sink through. The length direction of the folding notch is parallel to the conveying direction of the conveyor belt. After the pre-stacked body sinks through the folding notch, it forms a stacked body of packaging bags folded in the middle. A strip carrier is horizontally positioned within the folded opening, with its length parallel to the length of the folded opening. The strip carrier is used to support the bottom centerline of the pre-stacked body and is configured to move up and down. The bar is parallel to the bar carrier and located directly above the bar carrier. The initial position of the bar is higher than the upper surface of the pre-stacked body on the conveyor belt so that the pre-stacked body can be conveyed by the conveyor belt to the area directly below the bar. A lifting drive mechanism is located above the bar-shaped pressure bar. The output end of the lifting drive mechanism is fixedly connected to the bar-shaped pressure bar, and the output end of the lifting drive mechanism is used to drive the bar-shaped pressure bar to rise and fall. The tape winding mechanism is located directly below the strip carrier. The tape winding mechanism has a tape winding position. When the strip carrier is in the downward position, the stacked bodies on the strip carrier are located at the tape winding position. Among them, the lifting drive mechanism drives the strip pressure bar to descend so as to press the pre-stacked body against the strip carrier and continue to descend to the tape winding position. The tape winding mechanism winds the tape around the middle position of the strip pressure bar, the pre-stacked body and the strip carrier as a whole. Both the bar struts and the bar carriers have an anti-stick coating on their surfaces.

[0009] Furthermore, side baffles are fixedly installed on both sides of the strip-shaped vehicle, and a longitudinal channel for the strip-shaped vehicle to move up and down is formed between the two side baffles. Both side baffles have clearance slots for avoiding the wrapping mechanism. During the descent of the strip carrier, the longitudinal channel provides lateral support to the sides of the stacked body after centering and folding, so as to ensure that it stably maintains the centering and folding state. The length of the side baffle is no longer than the length of the strip carrier, the length of the strip carrier is less than the length of the stack, and the end of the stack protrudes from the end of the strip carrier to form an exposed end for a robotic arm or manual grasping.

[0010] Furthermore, the winding mechanism includes: The frame has a central through hole that extends along its thickness at its center, forming a tape wrapping position. The frame is set vertically, and its top has a feed inlet that extends downward to the central through hole. The width of the feed inlet is not less than the width of the longitudinal channel. There are several support gears, which are evenly distributed around the central through hole in the circumferential direction. Each support gear is axially connected to a fixed point on the bracket. The central gear is located inside all the support gears and meshes with all the support gears. The central gear is coaxial with the central through hole and has a U-shaped through hole that extends radially from its center to the outside. The first rotary motor is fixedly mounted on the frame, and the rotary output end of the first rotary motor is connected to one of the support gears; The damping shaft is eccentrically located at the center of the gear, and the opening direction of the damping shaft and the U-shaped through hole forms a ° angle. The damping shaft is used to attach the tape roll to provide a reaction force to maintain the tension of the tape roll during the winding process. The initial state of the central gear is configured such that the U-shaped through hole is vertically upward and connected to the longitudinal channel.

[0011] Furthermore, a swing arm is provided on one side of the frame where the damping shaft is located, and the lower end of the swing arm is connected to the frame shaft. A second rotary motor for driving the swing arm to rotate is provided on the other side of the frame. A linear drive mechanism is provided on the swing arm. The length direction of the linear drive mechanism is consistent with the length direction of the swing arm. A traction block is connected to the translation output end of the linear drive mechanism. An adsorption plane is formed on the side of the traction block facing the central through hole. A negative pressure cavity is formed inside the traction block. A negative pressure source is connected to the negative pressure hole formed on the adsorption plane. The tape winding direction is configured such that when the winding is finished, the non-adhesive side of the tape faces the adsorption plane; The translational motion of the linear drive mechanism's translational output end is configured such that, during the process of the swing arm rotating in the opposite direction and driving the traction block away from the tape winding position, the linear drive mechanism synchronously adjusts the distance between the traction block and the swing arm shaft contact point to actively reserve slack for the tape, so that the tape is always in a slack state.

[0012] Furthermore, a cutting blade is provided on the top side wall of the traction block, and the cutting blade protrudes from the adsorption plane; The cutting blade is connected to the top side wall of the traction block via a small electric lead screw slide, and the cutting blade is fixed to the slider output end of the small electric lead screw slide. The cutting direction of the cutter is configured to be parallel to the width direction of the tape.

[0013] Furthermore, an elastic lifting mechanism is fixedly connected to the bottom of one end of the strip carrier. The elastic lifting mechanism includes a guide column and a guide column sleeve. The guide column is fixedly connected to the bottom of one end of the strip carrier, and the guide column sleeve is fixedly set below the conveyor belt. The guide column and the guide column sleeve are slidably inserted into the guide column sleeve. The guide column sleeve is provided with a compression spring for upward contact with the bottom of the guide column. There is a rotation limit between the guide column and the guide column sleeve. One end of the bar-shaped pressure bar has an upwardly extending connecting rod, and the upper end of the connecting rod is connected to the output end of the lifting drive mechanism; The end of the strip carrier away from the guide post and the end of the strip pressure bar away from the connecting rod both face the end of the conveyor belt so that the stacked body after the belt is wrapped can be taken out without obstruction.

[0014] Furthermore, the lower end of the swing arm is connected to the frame shaft via a pivot, and the swing arm and the pivot are slidably connected by a spline. The end of the pivot away from the swing arm passes through the frame and is connected to the output shaft of the second rotary motor. An electric actuator is provided on the side of the frame. The axial direction of the electric actuator is parallel to the axial direction of the pivot. A shift fork connected to the lower end of the swing arm is provided on the output shaft of the electric actuator. The shift fork is used to drive the swing arm to slide along the axial direction of the pivot so that the swing arm is offset from the circumferential motion path of the tape roll along the axial direction of the pivot.

[0015] Furthermore, the anti-stick coating is a PTEE coating.

[0016] Furthermore, there are two conveyor belts, which are arranged in parallel and spaced apart in the width direction. A baffle is provided within the gap between the two conveyor belts. The length of the baffle is less than the length of the conveyor belt, and the baffle extends from the beginning of the conveyor belt towards the end. A folded gap is formed between the two conveyor belts and the stop bar.

[0017] Furthermore, the strip carrier has a V-shaped cross-section and its open span is larger than the diameter of the strip pressure bar. There are two elastic lifting mechanisms, which are respectively set at the bottom of both ends of the strip carrier. The strip carrier is disconnected at the avoidance slot to avoid the tape.

[0018] The beneficial effects of this invention are: This invention achieves automatic centering and positioning of the pre-stacked body through the folding notch of the conveyor belt and the strip carrier. After the strip pressure bar descends, it clamps and presses the stacked body with the strip carrier. Then, it is transferred to the winding position of the winding mechanism for tape winding and gathering. This realizes the full automation of the process from material conveying, centering and folding, pressing and positioning to tape winding and gathering, effectively solving the problems of low efficiency and insufficient stability of manual operation in the prior art. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a top view schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the planar structure of the pre-stacked body before the folding begins, according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the planar structure of the pre-folded body after folding, according to an embodiment of the present invention; Figure 4 for Figure 2 A plan view of the winding mechanism in its current state; Figure 5 for Figure 3 A plan view of the winding mechanism in its current state; Figure 6 This is a schematic diagram of the planar structure of the cutting blade according to an embodiment of the present invention; The labels in the diagram represent the following: 1-Conveyor belt; 1a-Stop bar; 1b-Folding notch; 1c-Longitudinal channel; 2-Pre-stacked body; 3-Stacked body; 3a-Exposed end; 4-Strip carrier; 4a-Guide post; 4b-Guide post sleeve; 5-Strip pressure bar; 5a-Connecting rod; 6-Side baffle; 6a-Avoidance slot; 7-Wrapping mechanism; 7a-Central through hole; 7b-Inlet; 7c-Frame; 8- 9-Support gear; 10-Central gear; 11-U-shaped through hole; 12-First rotary motor; 13-Damping shaft; 14-Swing arm; 15-Second rotary motor; 16-Pivot; 17-Spline; 18-Linear drive mechanism; 19-Traction block; 10-Adsorption plane; 10-Negative pressure hole; 11-Small electric lead screw slide; 12-Cut blade; 13-Adhesive tape; 14-Electric push rod; 15-Shift fork. Detailed Implementation

[0021] 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.

[0022] This embodiment provides a device for collecting and transferring finished courier packaging bags after stacking, which aims to solve the problem of low efficiency caused by manual operation when folding and bundling stacked courier bags at the end of traditional production lines.

[0023] For details, see Figures 1 to 6 The finished product stacking and transfer device for express packaging bags includes: a conveyor belt 1, a strip carrier 4, a strip pressure bar 5, a lifting drive mechanism, and a winding mechanism 7.

[0024] The conveyor belt 1 is used to transport the pre-stacked body 2 of the packaging bag stack after two side folds. The conveying direction of the conveyor belt 1 is parallel to the fold extension direction of the pre-stacked body 2. At the end of the conveyor belt 1, a folding notch 1b is formed for the pre-stacked body 2 to sink through. The length direction of the folding notch 1b is parallel to the conveying direction of the conveyor belt 1. The strip carrier 4 is horizontally positioned within the folding notch 1b, with its length parallel to the length of the folding notch 1b, and is used to support the bottom centerline of the pre-stacked body 2. The strip carrier 4 is configured to move vertically. The bar bar 5 is parallel to the bar carrier 4 and located directly above the bar carrier 4. The initial position of the bar bar 5 is higher than the upper surface of the pre-stacked body 2 on the conveyor belt 1, so that the pre-stacked body 2 can be conveyed by the conveyor belt 1 to the area directly below the bar bar 5. The lifting drive mechanism is located above the bar bar 5. The output end of the lifting drive mechanism is fixedly connected to the bar bar 5 to drive the bar bar 5 to rise and fall. The wrapping mechanism 7 is located directly below the strip carrier 4, and the wrapping mechanism 7 has a wrapping position for the tape 17.

[0025] During operation, the pre-stacked body 2 is transported to the area below the strip pressure bar 5. The lifting drive mechanism then drives the strip pressure bar 5 to descend, pressing the pre-stacked body 2 onto the strip carrier 4. Subsequently, the strip pressure bar 5 pushes the pre-stacked body 2 and the strip carrier 4 to continue descending, passing through the folded notch 1b. During this sinking process, the pre-stacked body 2 is passively folded in half from the middle with the strip carrier 4 as the center line, forming a stacked body 3 of packaging bags; When the strip carrier 4 descends to the predetermined position, the stacked body 3 on the strip carrier 4 is located at the tape 17 winding position. At this time, the tape winding mechanism 7 is activated to wind the tape 17 around the middle position of the strip pressure bar 5, the stacked body 3 and the strip carrier 4.

[0026] During the aforementioned winding process, the tape 17 will inevitably come into contact with the strip pressure bar 5 and the strip carrier 4. In order to prevent the adhesive surface of the tape 17 from sticking to the pressure bar and the carrier, which would make subsequent separation difficult, an anti-stick coating is formed on the surface of both the strip pressure bar 5 and the strip carrier 4. Specifically, the anti-stick coating can be a PTEE coating, which utilizes its low surface energy characteristics to effectively prevent the tape 17 from adhering, thus facilitating the lateral removal of the subsequent stacked body 3.

[0027] In the above scheme, the strip pressure bar 5, the stacked body 3 and the strip carrier 4 are wrapped together as a whole. In order to ensure the stability of the pressing and binding process, the cross section of the strip carrier 4 is V-shaped. When the strip pressure bar 5 presses down the packaging bag, the V-shaped groove can guide the strip pressure bar 5 and ensure that the strip pressure bar 5 is stably pressed on the center line of the strip carrier 4.

[0028] This avoids potential misalignment between the two components during the downward pressure process when the strip carrier 4 is planar. Simultaneously, the opening span of the V-groove is greater than the diameter of the strip pressure bar 5, and the diameter of the strip pressure bar 5 and the dimensions of the strip carrier 4 are designed to be neither too thick nor too large, to avoid excessively encroaching on the effective wrapping area in the circumferential direction.

[0029] In the above scheme, in order to stably form a folded notch 1b at the end of the conveyor belt 1 and provide stable conveying support for the pre-stacked body 2, the conveyor belt 1 can be specifically implemented as two, the two conveyor belts 1 are arranged in parallel and spaced apart in the width direction, and a baffle 1a is provided in the gap between the two conveyor belts 1. The length of the baffle 1a is less than the length of the conveyor belt 1, and the baffle 1a extends from the beginning end of the conveyor belt 1 towards the end end.

[0030] During the conveying process, the pre-stacked body 2 is supported by two conveyor belts 1 on both sides and by a baffle 1a in the middle. When the pre-stacked body 2 reaches the end of the conveyor belt 1, the middle of the pre-stacked body 2 is suspended due to the early termination of the baffle 1a. At this time, the gap formed between the two conveyor belts 1 and the end of the baffle 1a constitutes the folding notch 1b, which creates conditions for the subsequent downward folding of the strip pressure bar 5.

[0031] During the process of the pre-stacked body 2 being pressed down by the strip pressure bar 5 through the folding notch 1b to form the stacked body 3, the two sides of the stacked body 3 naturally droop under the action of gravity. If there is no constraint, the two sides may fold down excessively. Furthermore, during the subsequent wrapping process, the stacked body 3 may also spread out to both sides due to the lack of lateral constraint, thereby affecting the neatness of the stacked body 3 after wrapping.

[0032] To solve this problem, side baffles 6 are fixedly installed on both sides of the strip carrier 4. A longitudinal channel 1c is formed between the two side baffles 6 for the strip carrier 4 to move up and down. During the descent of the strip carrier 4, this longitudinal channel 1c can provide lateral support for the centered folded side of the stacked body 3, preventing it from overturning and ensuring that it remains stably centered and folded during the wrapping process, without spreading out to the sides. At the same time, in order to enable the wrapping mechanism 7 to bind the stacked body 3, both side baffles 6 are provided with avoidance slots 6a for avoiding the wrapping mechanism.

[0033] Furthermore, after bundling, the stacked body 3 needs to be removed. To facilitate subsequent processes (such as robotic arms or manual handling), the length of the side baffle 6 is no longer than the length of the strip carrier 4, and the length of the strip carrier 4 is less than the length of the stacked body 3. In this way, the end of the stacked body 3 will protrude from the end of the strip carrier 4, forming an exposed end 3a for gripping.

[0034] In the above structure, the strip carrier 4 and the strip pressure bar 5 need to be precisely aligned vertically. At the same time, the bundled stack 3 needs to be easily removed. If the lifting structure and the guiding structure are distributed on both sides, they may interfere with the removal action.

[0035] Therefore, a single-sided support structure can be adopted. Specifically, an elastic lifting mechanism is fixedly connected to the bottom of one end of the strip carrier 4. The elastic lifting mechanism includes a guide post 4a and a guide post sleeve 4b. The guide post 4a is fixedly connected to the bottom of one end of the strip carrier 4, and the guide post sleeve 4b is fixedly set below the conveyor belt 1. The guide post 4a and the guide post sleeve 4b are slidably inserted into the guide post sleeve 4b. The guide post sleeve 4b is provided with a compression spring for pushing upward against the bottom of the guide post 4a, providing a certain pre-support force for the strip carrier 4.

[0036] Meanwhile, the final height of the compression spring lifting the strip carrier 4 is limited to not exceeding the surface of the conveyor belt 1, so as not to hinder the normal conveying of the pre-stacked body 2. There is a rotation limit between the guide post 4a and the guide post sleeve 4b to ensure that the strip carrier 4 will not rotate during the lifting process. Correspondingly, one end of the strip pressure bar 5 forms an upwardly extending connecting rod 5a, and the upper end of the connecting rod 5a is connected to the output end of the lifting drive mechanism.

[0037] With this design, the end of the strip carrier 4 away from the guide post 4a and the end of the strip pressure bar 5 away from the connecting rod 5a both face the end of the conveyor belt 1, forming an open feeding port, so that the stacked body 3 that has completed the winding can be taken out from the side or end without obstruction.

[0038] Furthermore, regarding the winding mechanism 7, this embodiment provides a specific implementation method. The winding mechanism 7 includes: a frame 7c, several support gears 8, a central gear 9, a first rotary motor 10, and a damping shaft 11.

[0039] A central through hole 7a is formed at the center of the frame 7c, extending along its thickness direction. The central through hole 7a forms the wrapping position for the tape 17. The frame 7c is set in a vertical position, and a feed port 7b is formed at its top, which connects downward to the central through hole 7a. The width of the feed port 7b is designed to be no less than the width of the longitudinal channel 1c, so that the stacked body 3, the pressure bar and the carrier above can enter smoothly.

[0040] There are several support gears 8, which are evenly distributed around the central through hole 7a. Each support gear 8 is axially connected to a fixed point on the bracket. The central gear 9 is located inside all the support gears 8 and meshes with all the support gears 8. The central gear 9 is coaxial with the central through hole 7a and has a U-shaped through hole 9A extending radially from the center to the outside.

[0041] The first rotary motor 10 is fixedly mounted on the frame 7c, and its rotation output end is connected to one of the support gears 8. The damping shaft 11 is axially mounted on the eccentric part of the central gear 9, and the opening direction of the damping shaft 11 and the U-shaped through hole 9A are at a 180° angle. The damping shaft 11 is used to sleeve the tape roll and provides a reaction force to maintain the tension of the tape 17 during the winding process through the damping effect.

[0042] In the initial state, the central gear 9 is configured with the U-shaped through-hole 9A vertically upward and connected to the longitudinal channel 1c. When the stack 3, pressure bar, and carrier descend, they pass through the U-shaped through-hole 9A and enter the central through-hole 7a. Subsequently, the first rotary motor 10 starts, driving the support gear 8 to rotate, which in turn drives the central gear 9 to rotate around the stack 3. Since the tape roll is mounted on the central gear 9, the rotation of the central gear 9 drives the tape roll to move around the stack 3, thereby achieving winding.

[0043] When using the aforementioned wrapping mechanism 7, it is necessary to solve the problems of gripping, pulling, and cutting the end of the tape 17. To this end, a swing arm 12 is provided on one side of the frame 7c where the damping shaft 11 is located. The lower end of the swing arm 12 is axially connected to the frame 7c. On the other side of the frame 7c, a second rotary motor 13 is provided to drive the swing arm 12 to rotate. A linear drive mechanism 15 is provided on the swing arm 12. The length direction of the linear drive mechanism 15 is consistent with the length direction of the swing arm 12. A traction block 15a is connected to the translation output end of the linear drive mechanism 15. An adsorption plane 15b is formed on the side of the traction block 15a facing the central through hole 7a. A negative pressure cavity is formed inside the traction block 15a. A negative pressure source is connected to the negative pressure cavity to communicate with the negative pressure hole 15d formed on the adsorption plane 15b.

[0044] The winding direction of the tape 17 is pre-configured such that when the central gear 9 finishes winding and stops, the non-adhesive side of the tape 17 always faces the adsorption plane 15b on the traction block 15a. After the winding is completed, the swing arm 12 rotates close to the stacked body 3, and at the same time, the negative pressure source on the traction block 15a is activated to adsorb the tape 17 that is facing it.

[0045] After the tape 17 is attracted, the swing arm 12 needs to rotate in the opposite direction. The main purpose of this action is to make the swing arm 12 and the traction block 15a move away with the attracted tape 17, freeing up the open end of the U-shaped through hole 9A on the central gear 9 so that the next stacked body 3 can fall smoothly and enter the tape 17 winding position.

[0046] During the reverse rotation of the swing arm 12, in order to prevent the tape 17 from being tightened, the translation output end of the linear drive mechanism 15 moves synchronously to actively shorten the distance between the traction block 15a and the shaft contact point of the swing arm 12, thereby providing slack for the tape 17 and preventing the tension of the tape 17 from exceeding the negative pressure suction, causing the head end of the tape 17 to separate from the traction block 15a.

[0047] The above solution solves the problem of automatically grabbing the end of the tape 17. However, when installing a new roll of tape 17, it is usually necessary to manually pull the end of the tape 17 and stick it to the traction block 15a (or stick it to the stack 3 when using it for the first time). After one winding cycle, if the basic implementation method is adopted, it may be necessary to manually cut the tape 17 and manually stick the cut end of the tape 17 to the traction block 15a again. This manual intervention reduces the degree of automation.

[0048] To achieve fully automatic cutting and splicing, a cutting blade 16a is provided on the top side wall of the traction block 15a. The cutting blade 16a protrudes from the adsorption plane 15b and is connected to the top side wall of the traction block 15a via a small electric screw slide 16 and is fixed to the slider output end of the small electric screw slide 16. The cutting direction of the cutting blade 16a is configured to be parallel to the width direction of the tape 17. When the traction block 15a adsorbs the tape 17 and pulls it out to a certain length, the small electric screw slide 16 is activated, driving the cutting blade 16a to move laterally. The cutting blade 16a cuts the tape 17 (near the stack 3 side) adsorbed by the traction block 15a. After cutting, the tape 17 on one side of the bundled stack 3 is separated, while the traction block 15a continues to adsorb and hold the new tape 17 head extending from the tape roll, preparing for the next cycle.

[0049] In the above structure, the swing arm 12 and the traction block 15a are used to process the end of the tape 17 after the winding is completed. However, during the winding process, the central gear 9 and the tape roll on it rotate around the central through hole 7a. If the swing arm 12 and the traction block 15a are located on the rotation path of the tape roll, interference may occur. Although the second rotary motor 13 can drive the swing arm 12 to rotate in the opposite direction, the rotation angle may not be too large (if the angle is too large, the compensation stroke of the linear drive mechanism 15 may not be sufficient, causing the tape 17 to be over-tensioned and detach). If the reversal angle is not enough to completely avoid the rotation path, there is still a risk of interference.

[0050] To reliably avoid obstacles, an electric actuator 18 is provided on the side of the frame 7c. The axial direction of the electric actuator 18 is parallel to the axial direction of the pivot 14. The lower end of the swing arm 12 is axially connected to the frame 7c through a pivot 14. The swing arm 12 and the pivot 14 are slidably connected through a spline 14a. The end of the pivot 14 away from the swing arm 12 passes through the frame 7c and is connected to the output shaft of the second rotary motor 13. A shift fork 19 connected to the lower end of the swing arm 12 is provided on the output shaft of the electric actuator 18.

[0051] When the winding mechanism 7 is working, the electric push rod 18 actuates, driving the swing arm 12 to slide axially along the pivot 14 via the shift fork 19, thus offsetting it from the circumferential motion path of the tape roll in the axial direction to avoid interference. When the winding is finished and the central gear 9 stops rotating, the electric push rod 18 resets, causing the swing arm 12 to move back to the working position so that the traction block 15a can perform subsequent adsorption and cutting actions.

[0052] Furthermore, this embodiment provides a better structure for the strip carrier 4 to achieve a contactless effect with the tape 17 during the wrapping process. Specifically, there are two elastic lifting mechanisms, which are respectively set at the bottom of both ends of the strip carrier 4. The strip carrier 4 is disconnected at the avoidance groove 6a, forming two separate support sections.

[0053] Thus, during the process of the tape winding mechanism 7 winding the tape 17, the strip carrier 4 at the bottom of the stack 3 is disconnected at the winding area, and the strip pressure bar 5 is wrapped inside the stack 3 itself. With the lateral limiting effect of the side baffle 6, the folded posture of the stack 3 is effectively maintained.

[0054] Therefore, during the wrapping process, the tape 17 will not come into contact with the surfaces of the strip carrier 4 and the strip pressure bar 5, thereby eliminating the risk of tape 17 sticking together, ensuring the continuous reliability of the wrapping operation, and enabling the tape 17 to completely cover the stacked body 3 in the circumferential direction; at the same time, since one end of the strip pressure bar 5 is open, when the stacked body 3 is taken out after being bundled, it is equivalent to being directly pulled horizontally from the strip pressure bar 5, realizing the unobstructed removal of the stacked body.

[0055] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. A device for collecting and transferring stacked finished express packaging bags, characterized in that, include: A conveyor belt (1) is used to convey a pre-stacked body (2) of a stack of packaging bags that has been folded twice on the sides. The conveying direction of the conveyor belt (1) is parallel to the folding direction of the pre-stacked body (2). A folding notch (1b) is formed at the end of the conveyor belt (1) for the pre-stacked body (2) to sink through. The length direction of the folding notch (1b) is parallel to the conveying direction of the conveyor belt (1). After the pre-stacked body (2) sinks through the folding notch (1b), it forms a stacked body (3) of packaging bags folded in the middle. A strip carrier (4) is horizontally positioned within the folding notch (1b). The length direction of the strip carrier (4) is parallel to the length direction of the folding notch (1b). The strip carrier (4) is used to support the bottom centerline of the pre-stacked body (2). The strip carrier (4) is configured to move up and down. A strip pressure bar (5) is parallel to the strip carrier (4) and located directly above the strip carrier (4). The initial position of the strip pressure bar (5) is higher than the upper surface of the pre-stacked body (2) on the conveyor belt (1) so that the pre-stacked body (2) can be conveyed by the conveyor belt (1) to directly below the strip pressure bar (5). A lifting drive mechanism is provided above the strip pressure bar (5). The output end of the lifting drive mechanism is fixedly connected to the strip pressure bar (5). The output end of the lifting drive mechanism is used to drive the strip pressure bar (5) to rise and fall. A wrapping mechanism (7) is located directly below the strip carrier (4). The wrapping mechanism (7) has a tape (17) winding position. When the strip carrier (4) is in the downward position, the stacked body (3) on the strip carrier (4) is located at the tape (17) winding position. The lifting drive mechanism drives the strip pressure bar (5) to descend so as to press the pre-stacked body (2) against the strip carrier (4) and continue to descend to the tape (17) winding position. The tape winding mechanism (7) winds the tape (17) around the middle position of the strip pressure bar (5), the pre-stacked body (2) and the strip carrier (4). Both the strip pressure bar (5) and the strip carrier (4) have an anti-stick coating on their surfaces.

2. The device for collecting and transferring finished express packaging bags after stacking according to claim 1, characterized in that, Side baffles (6) are fixedly provided on both sides of the strip carrier (4), and a longitudinal channel (1c) is formed between the two side baffles (6) for the strip carrier (4) to move up and down. Both side baffles (6) have clearance slots (6a) for avoiding the wrapping mechanism. The longitudinal channel (1c) provides lateral support to the side of the stacked body (3) after center folding during the descent of the strip carrier (4) to ensure that it stably maintains the center folding state. The length of the side baffle (6) is not longer than the length of the strip carrier (4), the length of the strip carrier (4) is less than the length of the stack (3), and the end of the stack (3) protrudes from the end of the strip carrier (4) to form an exposed end (3a) for a robotic arm or manual grasping.

3. The device for collecting and transferring finished express packaging bags after stacking according to claim 2, characterized in that, The winding mechanism (7) includes: The frame (7c) has a central through hole (7a) at its center that extends along its thickness direction. The central through hole (7a) forms the wrapping position for the tape (17). The frame (7c) is set vertically, and a feed inlet (7b) is formed at its top that extends downward to the central through hole (7a). The width of the feed inlet (7b) is not less than the width of the longitudinal channel (1c). There are several support gears (8), which are evenly distributed around the central through hole (7a) in the circumferential direction. Each support gear (8) is axially connected to the bracket at a fixed point. A central gear (9) is located inside all the support gears (8) and meshes with all the support gears (8). The central gear (9) is coaxial with the central through hole (7a). A U-shaped through hole (9A) is formed on the central gear (9) extending radially from its center to the outside. The first rotary motor (10) is fixedly mounted on the frame (7c), and the rotation output end of the first rotary motor (10) is connected to one of the support gears (8). The damping shaft (11) is axially mounted on the eccentric part of the central gear (9), and the opening direction of the damping shaft (11) and the U-shaped through hole (9A) are at an angle of 180°. The damping shaft (11) is used to sleeve the tape roll to provide a reaction force to maintain the tension of the tape (17) during the winding process. The initial state of the central gear (9) is configured such that the U-shaped through hole (9A) is vertically upward and connected to the longitudinal channel (1c).

4. The device for collecting and transferring stacked finished express packaging bags according to claim 3, characterized in that, A swing arm (12) is provided on one side of the frame (7c) where the damping shaft (11) is located. The lower end of the swing arm (12) is axially connected to the frame (7c). A second rotary motor (13) is provided on the other side of the frame (7c) to drive the swing arm (12) to rotate. A linear drive mechanism (15) is provided on the swing arm (12). The length direction of the linear drive mechanism (15) is consistent with the length direction of the swing arm (12). A traction block (15a) is connected to the translation output end of the linear drive mechanism (15). An adsorption plane (15b) is formed on the side of the traction block (15a) facing the central through hole (7a). A negative pressure cavity is formed inside the traction block (15a). A negative pressure source is connected to the negative pressure cavity to communicate with the negative pressure hole (15d) formed on the adsorption plane (15b). The wrapping direction of the tape (17) is configured such that when the wrapping is finished, the non-adhesive side of the tape (17) faces the adsorption plane (15b). The translational motion of the translational output end of the linear drive mechanism (15) is configured such that: during the process of the swing arm (12) rotating in the opposite direction and driving the traction block (15a) away from the winding position of the tape (17), the linear drive mechanism (15) synchronously adjusts the distance between the traction block (15a) and the shaft contact point of the swing arm (12) to actively reserve slack for the tape (17) so that the tape (17) is always in a slack state.

5. A device for collecting and transferring stacked finished express packaging bags according to claim 4, characterized in that, A cutting blade (16a) is provided on the top side wall of the traction block (15a), and the cutting blade (16a) protrudes from the adsorption plane (15b). The cutting blade (16a) is connected to the top side wall of the traction block (15a) via a small electric lead screw slide (16), and the cutting blade (16a) is fixed to the slider output end of the small electric lead screw slide (16). The cutting direction of the cutting blade (16a) is configured to be parallel to the width direction of the tape (17).

6. The device for collecting and transferring stacked finished express packaging bags according to claim 1, characterized in that, One end of the strip carrier (4) is fixedly connected to an elastic lifting mechanism. The elastic lifting mechanism includes a guide post (4a) and a guide post sleeve (4b). The guide post (4a) is fixedly connected to the bottom of one end of the strip carrier (4). The guide post sleeve (4b) is fixedly disposed below the conveyor belt (1). The guide post (4a) and the guide post sleeve (4b) are slidably inserted into the guide post sleeve (4b). The guide post sleeve (4b) is provided with a compression spring for abutting the bottom of the guide post (4a) upward. There is a rotation limit between the guide post (4a) and the guide post sleeve (4b). One end of the strip-shaped pressure bar (5) is formed with an upwardly extending connecting rod (5a), and the upper end of the connecting rod (5a) is connected to the output end of the lifting drive mechanism; The end of the strip carrier (4) away from the guide post (4a) and the end of the strip pressure bar (5) away from the connecting rod (5a) both face the end of the conveyor belt (1) so that the stacked body (3) after the belt is wrapped can be taken out without obstruction.

7. A device for collecting and transferring stacked finished express packaging bags according to claim 4, characterized in that, The lower end of the swing arm (12) is axially connected to the frame (7c) via a pivot (14). The swing arm (12) and the pivot (14) are slidably connected via a spline (14a). The end of the pivot (14) away from the swing arm (12) passes through the frame (7c) and is connected to the output shaft of the second rotary motor (13). An electric actuator (18) is provided on the side of the frame (7c). The axial direction of the electric actuator (18) is parallel to the axial direction of the pivot (14). A fork (19) connected to the lower end of the swing arm (12) is provided on the output shaft of the electric actuator (18). The fork (19) is used to drive the swing arm (12) to slide along the axial direction of the pivot (14) so ​​that the swing arm (12) is offset from the circumferential motion path of the tape roll along the axial direction of the pivot (14).

8. The device for collecting and transferring finished express packaging bags after stacking according to claim 1, characterized in that, The anti-fouling coating is a PTEE coating.

9. A device for collecting and transferring finished express packaging bags after stacking, as described in claim 1, characterized in that, There are two conveyor belts (1), which are arranged in parallel and spaced apart in the width direction. A baffle (1a) is provided in the gap between the two conveyor belts (1). The length of the baffle (1a) is less than the length of the conveyor belt (1). The baffle (1a) extends from the beginning of the conveyor belt (1) toward the end. The folded notch (1b) is formed between the two conveyor belts (1) and the stop bar (1a).

10. A device for collecting and transferring stacked finished express packaging bags according to claim 6, characterized in that, The cross-section of the strip carrier (4) is V-shaped and its open span is greater than the diameter of the strip pressure bar (5); There are two elastic lifting mechanisms, which are respectively set at the bottom of both ends of the strip carrier (4). The strip carrier (4) is disconnected at the avoidance groove (6a) to avoid the tape (17).

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