Vertical paper feeder

Abstract

The invention discloses a vertical paper feeder which comprises a rack, a hopper, a suction cup material taking mechanism, a guide rod forming mechanism, an edge folding mechanism and a conveying mechanism. The suction cup material taking mechanism comprises a suction cup installation frame capable of doing reciprocating motion and a suction cup set arranged on the suction cup installation frame, the suction cup set communicates with the negative pressure suction pipeline so as to conduct vacuum suction material taking on the side face of the indentation paperboard blank in the hopper, and the suction cup set comprises a plurality of suction cup assemblies. The micro-motion processing mechanism is arranged on the outer side of the suction cup, the deflection arc plate reciprocates along the arc-shaped track in the assembly cavity to drive the end of the elastic ring to deflect in a reciprocating mode, and when the suction cup abuts against the side face of the indentation paperboard blank, friction processing (micro-motion cleaning or disturbance) is conducted on a to-be-sucked area; therefore, under the condition that dust, paper scraps or slight stains exist on the surface of the indentation paperboard blank, the effective attaching and sealing quality of the adsorption face can still be improved, the adsorption failure and material taking falling probability is reduced, and the continuous operation capacity of the whole machine is improved.

Description

Technical Field

[0001] This invention relates to the field of packaging machinery technology, and more particularly to a vertical paper feeder. Background Technology

[0002] In packaging production lines, creasing cardboard blanks for packaging containers are typically stacked in a flat, folded state in hoppers or bins. A paper feeder uses suction cups to pick up the blanks, guide and shape them, fold the edges and bottoms, and then transport them to the subsequent sealing station, achieving continuous automated operation. Existing vertical paper feeders generally use a reciprocating motion of a suction cup mounting frame to vacuum-adsorb the sides of the creasing cardboard blanks. This, combined with a guide rod forming mechanism, shapes the packaging container, and a folding mechanism completes the four-sided folding before output.

[0003] However, in actual production, existing technologies still generally have the following problems: 1. Adsorption reliability is greatly affected by the surface condition of the creasing cardboard blank. The sides of the creasing cardboard blank may have dust or paper scraps, glue stains, printing ink residue, moisture and wrinkles, local uneven textures or slight creases, etc., which will cause air leakage channels to form between the suction cup and the creasing cardboard blank, resulting in poor adsorption, adsorption failure or material falling off during the picking process, which will cause machine stoppage, paper jam or repeated picking.

[0004] 2. Lack of online processing or self-cleaning capabilities for the adsorption surface. Existing solutions mostly rely on increasing the vacuum level, increasing the number of suction cups, or manual cleaning and maintenance to deal with dirt and unevenness. It is difficult to quickly process the area to be adsorbed during equipment operation, thus making it difficult to balance high speed, stability, and low maintenance. Summary of the Invention

[0005] Based on the technical problems existing in the background technology, the present invention proposes a vertical paper feeder.

[0006] The vertical paper feeder proposed in this invention includes a frame, a hopper, a suction cup material handling mechanism, a guide rod forming mechanism, a folding mechanism, and a conveying mechanism; the suction cup material handling mechanism includes a reciprocating suction cup mounting frame and a suction cup assembly set on the suction cup mounting frame, the suction cup assembly being connected to a negative pressure suction pipeline to perform vacuum suction material handling on the side of the embossed paperboard blank in the hopper. The suction cup assembly includes multiple suction cup components, each suction cup component including a suction cup, a suction cup base, and a micro-motion processing mechanism disposed on the outside of the suction cup; The micro-motion processing mechanism includes a fixed ring, an assembly chamber, a deflection arc plate, an elastic ring, an elastic connector, and a deflection drive component; The fixing ring is fixedly sleeved on the outer wall of the large end of the suction cup, and an assembly chamber is formed inside the fixing ring; the elastic ring is coaxially arranged with the fixing ring, and the end of the elastic ring extends beyond the large end of the suction cup along the adsorption direction. The deflection arc plate is disposed in the assembly cavity and is guided and constrained by the inner wall of the assembly cavity so that it can reciprocate along the arc trajectory relative to the fixed ring. One end of the elastic connector passes through the fixing ring and is connected to the deflection arc plate, and the other end of the elastic connector is connected to the elastic ring. The deflection drive is operatively connected to the deflection arc plate and is used to drive the deflection arc plate to move back and forth along the arc trajectory, thereby causing the end of the elastic ring to reciprocate and deflect. When the suction cup touches the side of the indented cardboard blank, the area to be adsorbed is rubbed and the elastic ring forms an outer peripheral seal on the outer periphery of the end of the suction cup. The inner wall of the elastic ring near its end is provided with an auxiliary cleaning block, and the end of the suction cup is provided with a slit II for accommodating the auxiliary cleaning block, so that the auxiliary cleaning block is embedded in the slit II when it is pressed against the embossed cardboard blank in the aligned state.

[0007] Preferably, the front side of the elastic ring is provided with a slit, so that when the elastic ring comes into contact with the side of the creasing cardboard blank, it generates radial elasticity and adapts to the grooves or raised patterns on the surface of the creasing cardboard blank.

[0008] Preferably, the elastic ring is compressed during the adsorption and contact stage and retracts through the elastic connector, so that the end of the suction cup can contact the side of the embossed cardboard blank, thereby achieving a synergistic seal between the inner seal of the suction cup end and the supplementary seal of the outer periphery of the elastic ring.

[0009] Preferably, the elastic connector includes a sleeve rod, an assembly fixedly connected to the deflection arc plate, and a spring 1 disposed within the assembly. One end of the sleeve rod is movably sleeved within the assembly and connected to the spring 1, and the other end of the sleeve rod is connected to the elastic ring. The front of the fixing ring is provided with an arc-shaped groove for the sleeve rod to deflect along an arc-shaped trajectory.

[0010] Preferably, the deflection drive component includes a fixed support block, a second spring, an arc-shaped magnetic block, and an electromagnet. The fixed support block is fixed in the assembly chamber and alternately distributed with the deflection arc plate. The second spring is elastically connected between the fixed support block and the deflection arc plate, so that the deflection arc plate moves back and forth along the arc trajectory and stretches the second spring.

[0011] Preferably, one end of the arc-shaped magnetic block is fixed to the end of the deflection arc plate, the electromagnet is disposed on the back of the fixing ring and installed in the assembly chamber, and the free end of the electromagnet and the arc-shaped magnetic block are relatively close to each other, so that when the electromagnet is energized, it pushes the arc-shaped magnetic block to drive the deflection arc plate to deflect along the arc trajectory.

[0012] Preferably, the second slit forms a hidden space for the auxiliary cleaning block. When the deflection drive drives the elastic ring to reciprocate, the auxiliary cleaning block is located in front of the suction cup end and contacts the side of the embossed cardboard blank before the suction cup for friction cleaning. When the deflection drive stops, the auxiliary cleaning block in the reset state is embedded in the second slit when it is pressed against the embossed cardboard blank to avoid affecting the contact seal between the suction cup and the embossed cardboard blank.

[0013] Preferably, a compliant mounting assembly is provided between the suction cup and the suction cup base. The compliant mounting assembly includes a ball sleeve and a hollow sphere rotatably disposed in the ball sleeve. The small end of the suction cup is connected to a connecting pipe, and the connecting pipe is fixedly connected to the hollow sphere, thereby communicating between the hollow sphere and the suction cup. The ball sleeve is fixedly connected to the suction cup base, and the suction chamber inside the suction cup base communicates with the inside of the ball sleeve. A middle block is fixedly connected inside the hollow sphere. An elastic element is fixedly connected to one side of the middle block, and the other end of the elastic element is fixed in the suction chamber of the suction cup base.

[0014] Preferably, a reserved groove is provided on the outer side of one end of the hollow sphere. The reserved groove is located on the side close to the suction cup seat to ensure that the internal cavity of the hollow sphere is always connected to the internal suction chamber of the suction cup seat through the reserved groove when the hollow sphere rotates.

[0015] Preferably, the suction cup group is controlled by a control system to selectively open or close the vacuum adsorption branch corresponding to each suction cup in the suction cup group according to the packaging container specifications, so that the vacuum adsorption open state of each suction cup in the suction cup group is configurable, thereby adapting to packaging containers of different specifications.

[0016] The beneficial effects of this invention are as follows: 1. This invention provides a compliant mounting component between the suction cup and the suction cup base, enabling the suction cup to conform to the angle of the suction cup base. This allows the suction cup end face to adaptively adjust to a closer alignment even when the side of the embossed cardboard blank is tilted or locally uneven. This reduces the risk of air leakage caused by localized initial contact and uneven force, and also reduces the compression deformation of softer cardboard, improving material handling stability. At the same time, the cooperation between the hollow sphere and the reserved groove ensures that the negative pressure path remains connected when the suction cup deflects, preventing the vacuum channel from being blocked and causing unstable adsorption.

[0017] 2. This invention sets a micro-motion processing mechanism on the outside of the suction cup and uses a deflection arc plate to move back and forth along an arc trajectory in the assembly cavity, causing the end of the elastic ring to reciprocate and deflect. When the suction cup touches the side of the embossed cardboard blank, it performs friction processing (micro-motion cleaning or disturbance) on the area to be adsorbed. Thus, even when there is dust, paper scraps or slight stains on the surface of the embossed cardboard blank, it can still improve the effective adhesion and sealing quality of the adsorption surface, reduce the probability of adsorption failure and material falling off, and improve the continuous operation capability of the whole machine.

[0018] 3. This invention extends the end of the elastic ring beyond the end of the suction cup along the adsorption direction and forms an outer peripheral supplementary seal on the outer periphery of the suction cup end. Together with the seal of the suction cup end itself, it forms a dual sealing path of "inner seal + outer peripheral supplementary seal". At the same time, the elastic ring is provided with a slit to enhance radial compliance, thereby having a better fit to the raised texture or small grooves on the surface of the embossed cardboard blank, further improving the sealing stability and adsorption retention force.

[0019] 4. This invention provides an auxiliary cleaning block inside the elastic ring and a second slit at the end of the suction cup as a hidden space. This allows the auxiliary cleaning block to contact the suction cup and perform friction cleaning before the suction cup during the micro-movement stage. After the micro-movement stops and the stable adsorption stage begins, the auxiliary cleaning block can be embedded in the second slit under pressure to hide itself. This avoids the protruding structure from affecting the final sealing and bonding between the suction cup and the embossed cardboard blank, thus balancing the stability of cleaning and adsorption sealing.

[0020] 5. The present invention uses a control system to selectively open or close the vacuum adsorption branch corresponding to each suction cup in the suction cup group according to the packaging container specifications, so that the activation state of the suction cup group is configurable. This reduces ineffective adsorption and structural interference when changing packaging containers of different specifications, and improves the efficiency of changeover and operational stability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the folding mechanism of the present invention; Figure 3 This is a schematic diagram of the suction cup assembly of the present invention; Figure 4 This is a schematic diagram of the back of the suction cup assembly of the present invention; Figure 5 This is a cross-sectional view of the suction cup assembly and the compliant mounting assembly of the present invention; Figure 6 for Figure 5 Enlarged structural diagram at point A; Figure 7 This is a schematic diagram of the suction cup of the present invention; Figure 8 This is an exploded view of the micro-motion processing mechanism of the present invention; Figure 9 This is a schematic diagram of the fixing ring of the present invention; Figure 10 This is a schematic diagram of the elastic connector of the present invention.

[0022] In the diagram: 1. Frame; 2. Hopper; 3. Suction cup mounting bracket; 4. Guide rod forming mechanism; 5. Folding mechanism; 501. Front and rear folding sections; 502. Right side folding section; 503. Left side folding section; 6. Conveying mechanism; 7. Suction cup assembly; 701. Suction cup; 702. Suction cup base; 703. Micro-motion processing mechanism; 7031. Fixing ring; 7032. Assembly chamber; 7033. Deflection arc plate; 7034. Elastic ring; 8. Elastic connector 801. Sleeve rod; 802. Assembly kit; 803. Spring 1; 9. Deflection drive component; 901. Fixed support block; 902. Spring 2; 903. Arc-shaped magnetic block; 904. Electromagnet; 10. Auxiliary cleaning block; 11. Slit 1; 12. Slit 2; 13. Arc-shaped groove; 14. Compliant installation assembly; 1401. Ball sleeve; 1402. Hollow ball; 15. Connecting pipe; 16. Reserved groove; 17. Intermediate block; 18. Elastic component. Detailed Implementation

[0023] The specific embodiments of the present invention will be described below with reference to the accompanying drawings. It should be noted that: in the present invention, "crimped cardboard blank" refers to a corrugated cardboard blank that has been pre-crimped and folded into a flat state. It is placed vertically or nearly vertically in the hopper of the paper feeder. The paper feeding process involves unfolding the flat crimped cardboard blank into a rectangular formed packaging container, and then folding the four sides of the bottom of the packaging container. Example

[0024] like Figure 1-2 As shown, the vertical paper feeder includes a frame 1, a hopper 2 for accommodating creasing paperboard blanks, a suction cup feeding mechanism, a guide rod forming mechanism 4, a folding mechanism 5, and a conveying mechanism 6. Wherein: The hopper 2 is used to vertically stack and support multiple creasing cardboard blanks, and the hopper 2 can be configured to be adjusted according to the size of the creasing cardboard blanks to form a limiting guide in the vertical / horizontal direction of the stacked creasing cardboard blanks, so as to ensure the stability of the material picking position.

[0025] The suction cup material handling mechanism includes a suction cup mounting frame 3 driven by a drive component to perform horizontal reciprocating motion, and a suction cup assembly mounted on the suction cup mounting frame 3; the suction cup assembly is connected to a negative pressure suction pipeline and is used to vacuum suction material from the side of the embossed cardboard blank in the hopper 2.

[0026] The guide rod forming mechanism 4 works in conjunction with the suction cup material handling mechanism: when the suction cup assembly adsorbs and pulls out the creasing paperboard blank, the creasing paperboard blank is forced to unfold under the guidance and restriction of the relative guide rod, thus realizing paper feeding and forming.

[0027] The folding mechanism 5 includes left and right folding sections and front and rear folding sections 501: the left and right folding sections are driven by independent drive components, and the front and rear folding sections 501 are driven by a single drive component, so that the two folding wheels swing and move closer to each other to achieve synchronous folding. The left and right folding sections include a right folding section 502 and a left folding section 503.

[0028] The conveying mechanism 6 is used to convey and output the packaging container after the folding is completed. It can be implemented by conventional structures such as a guide base plate and two-sided drive belts.

[0029] Furthermore, the suction cup material handling mechanism may also include another driving component for controlling the suction cup mounting bracket 3 to move in a direction perpendicular to the horizontal reciprocating direction, so as to push the formed packaging container into the conveying mechanism 6 and deliver it out.

[0030] Example 2: Vacuum Branch Selection Control of Suction Cup Assembly like Figure 1-2 As shown, the suction cup assembly may include an adjustable suction cup mechanism located at the top and a fixed suction cup mechanism located at the bottom; both include a suction cup 701 and a suction cup base 702, and are connected to a negative pressure suction pipeline. Preferably, an electromagnetic on / off valve is provided at the connection end between the negative pressure suction pipeline and each suction cup 701, so that the vacuum adsorption branch corresponding to each suction cup can be opened or closed independently.

[0031] The control system selectively opens or closes the vacuum adsorption branch corresponding to each suction cup 701 in the suction cup group according to the specifications of the packaging container, so that the vacuum adsorption opening state of each suction cup 701 in the suction cup group can be configured to adapt to different specifications of packaging containers (such as scenarios where the effective adsorption area changes due to different creasing cardboard blank heights / widths).

[0032] In practical use, order parameters can be entered on the touch screen and the order change button can be pressed. The servo / pneumatic system will then move the relevant mechanisms to the matching position, while the control system will complete the configuration of the suction cup branch.

[0033] Example 3: Compliant mounting assembly of suction cup assembly like Figure 3-5 As shown, to improve the adaptability of the suction cup to situations such as side tilting and local unevenness of the embossed cardboard blank, a compliant mounting component 14 is provided between the suction cup 701 and the suction cup base 702. The compliant mounting component 14 includes a ball sleeve 1401 and a hollow ball 1402 rotatably disposed in the ball sleeve 1401. A connecting pipe 15 is connected to the small end of the suction cup 701, and the connecting pipe 15 is fixedly connected to the hollow ball 1402, making the hollow ball 1402 communicate with the suction cup 701; the ball sleeve 1401 is fixedly connected to the suction cup base 702, and the air suction chamber inside the suction cup base 702 communicates with the inside of the ball sleeve 1401; an elastic element 18 is fixedly connected to one side of the intermediate block 17, and the other end of the elastic element 18 is fixed in the air suction chamber of the suction cup base 702.

[0034] Furthermore, a reserved groove 16 is provided on the outer side of one end of the hollow sphere 1402, and the reserved groove 16 is located on the side close to the suction cup seat 702; when the hollow sphere 1402 deflects at an angle inside the ball sleeve 1401, the internal cavity of the hollow sphere can always be connected to the internal suction cavity of the suction cup seat 702 through the reserved groove 16, thereby avoiding the negative pressure passage being blocked or narrowed due to deflection.

[0035] Furthermore, by connecting one end of the elastic element 18 to the intermediate block 17, in the initial state, the elasticity of the elastic element 18 is used to pull the hollow sphere 1402 to stay centered and avoid arbitrary deflection.

[0036] Example 4: Structure of the micro-motion processing mechanism like Figure 2-10 As shown, the suction cup assembly 7 in the suction cup group includes a suction cup 701, a suction cup base 702, and a micro-motion processing mechanism 703 disposed on the outside of the suction cup 701. The micro-motion processing mechanism 703 includes a fixing ring 7031, an assembly chamber 7032, a deflection arc plate 7033, an elastic ring 7034, an elastic connector 8, and a deflection drive component 9.

[0037] 1) Fixing ring and assembly chamber: The fixing ring 7031 is fixedly sleeved on the outer wall of the large end of the suction cup 701, and the fixing ring 7031 forms an annular assembly chamber 7032 inside.

[0038] 2) Supplementary sealing around the elastic ring: The elastic ring 7034 is coaxially arranged with the fixing ring 7031, and the end of the elastic ring 7034 extends beyond the large end of the suction cup 701 along the adsorption direction. Thus, while forming an inner seal between the end of the suction cup 701 and the side of the creasing cardboard blank, the elastic ring 7034 can form a supplementary outer seal around the outer periphery of the suction cup end, improving adaptability to uneven surfaces and small air leakage channels.

[0039] 3) The "arc-shaped displacement" guiding method of the deflection arc plate (non-shaft-hole pivot): The deflection arc plate 7033 is disposed within the assembly chamber 7032 and is guided and constrained by the inner wall of the assembly chamber 7032, thereby enabling it to reciprocate along an arc-shaped trajectory relative to the fixed ring 7031. Preferably, the inner wall of the assembly chamber 7032 forms an arc-shaped guide surface that mates with the outer edge of the deflection arc plate 7033, allowing the deflection arc plate 7033 to complete a deflection motion of "sliding along the arc-shaped path of the chamber" under the driving action.

[0040] 4) Elastic connector and retraction compliance (cooperative sealing): One end of the elastic connector 8 passes through the fixed ring 7031 and is connected to the deflection arc plate 7033, and the other end is connected to the elastic ring 7034.

[0041] When the suction cup 701 approaches and abuts against the side of the creasing cardboard blank, the elastic ring 7034 preferentially contacts and is squeezed against the creasing cardboard blank. The elastic ring 7034 generates a retraction displacement through the elastic connector 8, so that the end of the suction cup 701 can further abut against the side of the creasing cardboard blank, thereby achieving a synergistic seal between the inner seal of the suction cup end and the supplementary seal of the outer circumference of the elastic ring.

[0042] The elastic connector 8 can be specifically implemented as: a sleeve 801, a mounting 802 fixedly connected to the deflection arc plate 7033, and a spring 803 disposed within the mounting 802; one end of the sleeve 801 is movably sleeved within the mounting 802 and connected to the spring 803, and the other end of the sleeve 801 is connected to the elastic ring 7034. An arc-shaped groove 13 is provided on the front of the fixing ring 7031 to allow the sleeve 801 to pass through when deflecting along an arc trajectory, thus avoiding interference.

[0043] 5) Deflection drive and micro-motion friction treatment: The deflection drive 9 is operatively connected to the deflection arc plate 7033 and is used to drive the deflection arc plate 7033 to move back and forth along the arc trajectory, thereby causing the end of the elastic ring 7034 to reciprocate and deflect; when the suction cup 701 abuts against the side of the indented cardboard blank, the reciprocating deflection of the elastic ring 7034 can perform friction treatment on the area to be adsorbed, such as disturbing / scraping local dirt, dust, loose surface fibers, etc., and maintaining the outer periphery supplementary seal.

[0044] The deflection drive component 9 may specifically include a fixed support block 901, a second spring 902, an arc-shaped magnetic block 903, and an electromagnet 904. The fixed support block 901 is fixed in the assembly chamber 7032 and alternately distributed with the deflection arc plate 7033. The second spring 902 is elastically connected between the fixed support block 901 and the deflection arc plate 7033, so that the deflection arc plate 7033 stretches the second spring 902 and obtains a restoring force during the deflection process.

[0045] One end of the arc-shaped magnetic block 903 is fixed to the end of the deflection arc plate 7033; the electromagnet 904 is set on the back of the fixing ring 7031 and installed in the assembly chamber 7032, and the electromagnet 904 is relatively close to the free end of the arc-shaped magnetic block 903; when the electromagnet 904 is energized, it pushes the arc-shaped magnetic block 903, causing the deflection arc plate 7033 to deflect along the arc trajectory.

[0046] Preferably, when the electromagnet 904 is energized, it generates the same magnetism as the free end magnetic pole of the arc-shaped magnetic block 903, and uses the repulsive force of like poles to achieve non-contact pushing; the control system can pulse or intermittently energize the electromagnet 904, so that the deflection arc plate 7033 generates high-frequency small-amplitude reciprocating movement, thereby realizing "micro-motion friction treatment".

[0047] 6) Radial Adaptation of Slit 1: The front side of the elastic ring 7034 is provided with slit 11. Slit 11 can be a cut / notch arranged radially or circumferentially, making it easier for the elastic ring 7034 to generate radial elastic deformation and local adhesion when it comes into contact with the side of the creasing cardboard blank, thereby adapting to the grooves or raised textures on the surface of the creasing cardboard blank and reducing local air leakage.

[0048] 7) "Hidden" structure of auxiliary cleaning block + slit two: The inner wall of the elastic ring 7034 near its end is provided with auxiliary cleaning block 10, and the end of the suction cup 701 is provided with slit two 12 for accommodating auxiliary cleaning block 10.

[0049] The second slit 12 forms a hidden space for the auxiliary cleaning block 10: when the deflection drive 9 drives the elastic ring 7034 to reciprocate, the auxiliary cleaning block 10 is located in front of the end of the suction cup 701, and can contact the side of the embossed cardboard blank before the suction cup for friction cleaning; when the deflection drive 9 stops, in the reset state, the auxiliary cleaning block 10 is embedded in the second slit 12 when it is pressed against the embossed cardboard blank, thereby avoiding the protruding structure from affecting the adhesion and sealing between the suction cup and the embossed cardboard blank.

[0050] It should be noted that the driving force of the deflection drive 9 overcomes the resistance of the second spring 902 to move the deflection arc plate; when the drive stops, the second spring 902 uses its elastic restoring force to quickly pull the deflection arc plate and the elastic ring 7034 back to the initial equilibrium position, ensuring that the auxiliary cleaning block 10 is accurately aligned with the second slit 12, thereby ensuring that the cleaning block can be smoothly embedded when the suction cup is attached, avoiding interference.

[0051] Working principle and operation process The operation process of this invention can be summarized into the following stages: (a) Order exchange and configuration phase When order parameters such as packaging container specifications and dimensions are input into the touch screen and the order change button is pressed, the servo power system moves the relevant adjustable components to a position that matches the packaging container specifications. At the same time, the control system selectively opens or closes the vacuum adsorption branch corresponding to each suction cup 701 (controlled by electromagnetic opening and closing valve) according to the packaging container specifications, so as to match the effective adsorption area of ​​different specifications of creasing cardboard blanks.

[0052] (II) Material Picking, Adhesion and Micro-motion Processing Stage After startup, the suction cup mounting bracket 3 moves horizontally reciprocating under the action of the drive component, and the suction cup assembly approaches the side of the outermost creasing cardboard blank in the hopper 2; the compliant mounting component 14 allows the suction cup 701 to deflect relative to the suction cup seat 702, making it easier for the end face of the suction cup to be directly aligned with the side of the creasing cardboard blank, which may have a slight tilt, while the reserved groove 16 ensures that the vacuum passage is connected and stable during deflection.

[0053] When the suction cup 701 contacts the side of the creasing cardboard blank, the elastic ring 7034 is preferentially contacted and squeezed because its end extends beyond the large end of the suction cup. The elastic ring retracts through the elastic connector 8, making way for the end of the suction cup to further contact the side of the creasing cardboard blank, forming a synergistic seal of "inner seal + outer peripheral supplementary seal".

[0054] Before or at the initial stage of adsorption, the control system can intermittently energize the electromagnet 904, causing the arc-shaped magnetic block 903 to push the deflection arc plate 7033 back and forth along the arc-shaped guide trajectory of the assembly chamber 7032 under the repulsive action of like poles; the deflection arc plate drives the elastic connector 8 and the end of the elastic ring 7034 to produce a slight reciprocating deflection, thereby performing friction treatment on the area to be adsorbed, improving the adaptability to the risk of air leakage caused by dirt, dust, and local unevenness.

[0055] Meanwhile, the auxiliary cleaning block 10 performs friction cleaning in front of the suction cup end when it reciprocates and deflects; after entering the stable adsorption stage, the auxiliary cleaning block 10 can be embedded into the slit 12 under pressure to avoid affecting the final adhesion and sealing of the suction cup end face.

[0056] (III) Vacuum adsorption blank taking and forming stage After the contact surface is processed and bonded, the vacuum is turned on for the selected suction cup branch, and the suction cup group forms a reliable vacuum adsorption on the side of the embossed cardboard blank; the suction cup mounting frame 3 pulls out the embossed cardboard blank in the return stroke and drives the embossed cardboard blank into the guide rod forming mechanism 4. Under the constraint and relative push of the guide rod, the embossed cardboard blank unfolds into a rectangular formed packaging container.

[0057] (iv) Folding and conveying stage After the packaging container is unfolded, the left and right folding sections fold the two side flaps into place under their respective drives. Then, the front and rear folding sections flip in opposite directions synchronously under a single drive, folding the front and rear flaps into place, thus achieving four-sided folding. Finally, the conveying mechanism 6 sends the packaging container out, completing the complete action of gripping, feeding paper, folding, and conveying.

Claims

1. A vertical paper feeder, comprising a frame (1), a hopper (2), a suction cup picking mechanism, a guide rod forming mechanism (4), a folding mechanism (5), and a conveying mechanism (6); the suction cup picking mechanism comprises a reciprocating suction cup mounting frame (3) and a suction cup assembly mounted on the suction cup mounting frame (3), wherein the suction cup assembly is connected to a negative pressure suction pipeline to vacuum pick up the side of the embossed cardboard blank in the hopper (2); Its features are: The suction cup assembly includes multiple suction cup components (7), each suction cup component (7) including a suction cup (701), a suction cup base (702), and a micro-motion processing mechanism (703) disposed on the outside of the suction cup (701). The micro-motion processing mechanism (703) includes a fixed ring (7031), an assembly chamber (7032), a deflection arc plate (7033), an elastic ring (7034), an elastic connector (8), and a deflection drive component (9); The fixing ring (7031) is fixedly sleeved on the outer wall of the large end of the suction cup (701), and an assembly chamber (7032) is formed inside the fixing ring (7031); the elastic ring (7034) is coaxially arranged with the fixing ring (7031), and the end of the elastic ring (7034) extends beyond the large end of the suction cup (701) along the adsorption direction; The deflection arc plate (7033) is disposed in the assembly chamber (7032) and is guided and constrained by the inner wall of the assembly chamber (7032) so that it can reciprocate along the arc trajectory relative to the fixed ring (7031); One end of the elastic connector (8) passes through the fixing ring (7031) and is connected to the deflection arc plate (7033), and the other end of the elastic connector (8) is connected to the elastic ring (7034); The deflection drive (9) is operatively connected to the deflection arc plate (7033) and is used to drive the deflection arc plate (7033) to move back and forth along the arc trajectory, thereby causing the end of the elastic ring (7034) to reciprocate and deflect. When the suction cup (701) touches the side of the indented cardboard blank, the area to be adsorbed is rubbed and the elastic ring (7034) forms an outer peripheral supplement seal on the outer periphery of the end of the suction cup (701). The inner wall of the elastic ring (7034) near its end is provided with an auxiliary cleaning block (10), and the end of the suction cup (701) is provided with a slit two (12) for accommodating the auxiliary cleaning block (10), so that the auxiliary cleaning block (10) is embedded in the slit two (12) when it is pressed against the embossed cardboard blank in the aligned state.

2. The vertical paper feeder according to claim 1, characterized in that, The elastic ring (7034) has a slit (11) on its front side so that the elastic ring (7034) can generate radial elasticity and adapt to the grooves or raised patterns on the surface of the creasing cardboard blank when it comes into contact with the side of the creasing cardboard blank.

3. The vertical paper feeder according to claim 1, characterized in that, The elastic ring (7034) is squeezed during the adsorption and contact stage and generates a retraction displacement through the elastic connector (8), so that the end of the suction cup (701) can contact the side of the embossed cardboard blank, thereby achieving a synergistic seal between the inner seal of the end of the suction cup (701) and the supplementary seal of the outer periphery of the elastic ring (7034).

4. The vertical paper feeder according to claim 1, characterized in that, The elastic connector (8) includes a sleeve rod (801), a mounting bracket (802) fixedly connected to the deflection arc plate (7033), and a spring (803) disposed in the mounting bracket (802). One end of the sleeve rod (801) is movably sleeved in the mounting bracket (802) and connected to the spring (803). The other end of the sleeve rod (801) is connected to the elastic ring (7034). The front of the fixing ring (7031) is provided with an arc groove (13) for the sleeve rod (801) to deflect along the arc trajectory.

5. The vertical paper feeder according to claim 1, characterized in that, The deflection drive component (9) includes a fixed support block (901), a second spring (902), an arc-shaped magnetic block (903), and an electromagnet (904). The fixed support block (901) is fixed in the assembly chamber (7032) and is alternately distributed with the deflection arc plate (7033). The second spring (902) is elastically connected between the fixed support block (901) and the deflection arc plate (7033) so that the deflection arc plate (7033) moves back and forth along the arc trajectory and stretches the second spring (902).

6. The vertical paper feeder according to claim 5, characterized in that, One end of the arc-shaped magnetic block (903) is fixed to the end of the deflection arc plate (7033). The electromagnet (904) is set on the back of the fixing ring (7031) and installed in the assembly chamber (7032). The free end of the electromagnet (904) and the arc-shaped magnetic block (903) are relatively close to each other so that when the electromagnet (904) is energized, it pushes the arc-shaped magnetic block (903) to drive the deflection arc plate (7033) to deflect along the arc trajectory.

7. The vertical paper feeder according to claim 1, characterized in that, The second slit (12) forms a hidden space for the auxiliary cleaning block (10). When the deflection drive (9) drives the elastic ring (7034) to deflect back and forth, the auxiliary cleaning block (10) is located in front of the end of the suction cup (701) and contacts the side of the embossed cardboard blank before the suction cup (701) to perform friction cleaning. When the deflection drive (9) stops, the auxiliary cleaning block (10) in the reset state is embedded in the second slit (12) when it is pressed against the embossed cardboard blank, so as to avoid affecting the contact seal between the suction cup (701) and the embossed cardboard blank.

8. The vertical paper feeder according to claim 1, characterized in that, A compliant mounting assembly (14) is provided between the suction cup (701) and the suction cup base (702). The compliant mounting assembly (14) includes a ball sleeve (1401) and a hollow ball (1402) rotatably disposed in the ball sleeve (1401). The small end of the suction cup (701) is connected to a connecting pipe (15), and the connecting pipe (15) is fixedly connected to the hollow ball (1402), so that the hollow ball (1402) communicates with the suction cup (701). The ball sleeve (1401) is fixedly connected to the suction cup base (702), and the suction chamber inside the suction cup base (702) communicates with the inside of the ball sleeve (1401). An intermediate block (17) is fixedly connected inside the hollow ball (1402). An elastic element (18) is fixedly connected to one side of the intermediate block (17), and the other end of the elastic element (18) is fixed in the suction chamber of the suction cup base (702).

9. The vertical paper feeder according to claim 8, characterized in that, The hollow sphere (1402) has a reserved groove (16) on the outer side of one end. The reserved groove (16) is located on the side close to the suction cup seat (702) to ensure that when the hollow sphere (1402) rotates, its internal cavity is always connected to the internal suction chamber of the suction cup seat (702) through the reserved groove (16).

10. The vertical paper feeder according to claim 1, characterized in that, It also includes a control system configured to selectively open or close the vacuum adsorption branch corresponding to each suction cup (701) in the suction cup group according to the packaging container specifications, so that the vacuum adsorption open state of each suction cup (701) in the suction cup group is configurable, thereby adapting to packaging containers of different specifications.

Images