Automatic stacking device for selected cigarette frames

Abstract

The utility model provides a kind of automatic stacking device of selected cigarette frame, including conveyer, elevator, sensor, jacking mechanism, side pushing mechanism and blocking mechanism are equipped on conveyer, can be in the middle positioning and be conveyed to the below of elevator after cigarette frame is in place by blocking, jacking, side pushing. Elevator is lifted, fixed cigarette frame and realizes stacking by supporting plate, clamping mechanism and positioning mechanism, still include the control equipment electrically connected with motor, sensor, cylinder solenoid valve. The device realizes cigarette frame conveying, positioning, lifting and stacking full-process automation by automatic mechanism, solves the problem of low efficiency and poor safety of manual stacking, can eliminate positional deviation, ensure the alignment of stand between cigarette frames, improve stacking efficiency by 3-5 times, effectively reduce safety risk, suitable for tobacco redrying processing cigarette frame temporary storage stacking.

Description

Technical Field

[0001] This utility model relates to the field of tobacco processing equipment technology, and in particular to an automated device for automatically stacking tobacco frames after tobacco leaf sorting. Background Technology

[0002] In the early stages of re-drying, tobacco leaves are sorted and packed into specific tobacco crates. After being weighed and scanned, the crates are temporarily stacked in a storage area. Currently, the stacking of tobacco crates mainly relies on manual operation using forklifts, stacking them from bottom to top. This process has the following drawbacks:

[0003] High dependence on manual labor: It requires high operating skills and experience from forklift operators, and the absence of skilled workers directly affects the stacking progress.

[0004] High safety risks: The tobacco frame has a folding structure and there is a gap of about 3mm in the lower insertion part. This causes the column to tilt outward under pressure after being filled with tobacco leaves. When stacking manually, it is easy to collapse due to misalignment of the upper and lower tobacco frames.

[0005] Inefficient: Manual operation is greatly affected by human factors, stacking efficiency is unstable, and reliability is significantly reduced when personnel are replaced.

[0006] Therefore, there is an urgent need for an automated device to replace manual stacking, reduce reliance, improve efficiency, and ensure security. Utility Model Content

[0007] This utility model provides an automatic stacking device for selected tobacco frames, which achieves precise positioning, lifting and stacking of tobacco frames through an automated mechanism, solving the problems of low efficiency and poor safety of manual stacking.

[0008] The automatic stacking device for selected cigarette frames provided by this utility model specifically includes a conveyor and an elevator. A sensor, a lifting mechanism, a side-pushing mechanism, and a blocking mechanism are installed on the conveyor located at the elevator entrance. The blocking mechanism and the lifting mechanism are installed in the center of the conveyor. When the sensor detects that a cigarette frame has reached a designated position, the blocking plate of the blocking mechanism rises to restrict the cigarette frame's movement, the roller of the lifting mechanism pushes the cigarette frame away from the conveyor, and the side-pushing mechanisms on both sides move synchronously to center the cigarette frame. Subsequently, the blocking plate and the roller descend, and the cigarette frame is conveyed to the area below the elevator. The elevator is equipped with a support plate, a locking mechanism, and a positioning mechanism. The support plate is used to support the bottom of the cigarette frame, the positioning mechanism positions the top of the cigarette frame, and the locking mechanism locks and fixes the cigarette frame that has risen to the predetermined position. This technical solution automates the entire process of smoke frame conveying, positioning, and stacking without manual intervention. Through a combination of "blocking-lifting-side pushing" actions, it eliminates positional deviations during smoke frame conveying, ensures lateral alignment accuracy during stacking, and solves the problem of inaccurate alignment during manual stacking. The lifting machine works in conjunction with the positioning and clamping mechanism to achieve stable stacking of multiple layers of smoke frames and avoid the risk of collapse.

[0009] Further describing the aforementioned solution, the conveyor includes a support frame, a chain, and a motor for driving the chain. The chain adopts a double-row sprocket structure. The motor drives the chain to rotate, causing the cigarette frames to be conveyed along the support frame. The double-row sprocket increases the meshing points between the chain and the drive sprocket, improving the overall load-bearing capacity.

[0010] Further describing the aforementioned solution, the lifting mechanism includes a lifting cylinder support, a lifting cylinder, and a roller. The lifting cylinder is mounted on the lifting cylinder support, and its piston rod is connected to the roller. The lifting cylinder drives the roller to rise and fall. When the cylinder piston rod extends, the roller rises and lifts the smoke frame away from the conveyor; when the cylinder piston rod retracts, the roller descends, and the smoke frame falls back onto the conveyor chain. The roller is parallel to the forward direction of the smoke frame. After the roller lifts the smoke frame, the smoke frame disengages from the conveyor chain, providing a low-resistance lateral positioning space for the side-pushing mechanism and avoiding the impact of chain friction on positioning accuracy.

[0011] Further describing the aforementioned solution, the side-pushing mechanism includes a side-pushing support and side-pushing cylinders. The side-pushing cylinders are mounted on the side-pushing support, and the piston rods of the two side-pushing cylinders are arranged opposite each other. When the smoke frame is lifted, the cylinder piston rods extend synchronously, pushing the smoke frame from both sides towards the center of the conveyor. After positioning is completed, the cylinders retract. The centering position of the smoke frame is controlled by the extension and retraction of the cylinders. This automatically eliminates the left and right offset of the smoke frame when it enters the conveyor, ensuring that the axis of the smoke frame is aligned with the central axis of the conveyor, laying the foundation for subsequent lifting and stacking.

[0012] Further describing the aforementioned solution, the blocking mechanism includes a blocking support, a cylinder, a guide rail, a slider, and a blocking plate. The guide rail is fixed to the blocking support. The cylinder drives the interconnected slider and blocking plate, causing them to rise or fall along the guide rail. After a sensor triggers, the cylinder piston rod pushes the slider, causing the blocking plate to rise and block the smoke frame perpendicular to its forward direction. After positioning is complete, the cylinder retracts, and the blocking plate descends along the guide rail, releasing the blockage. This precisely controls the stopping position of the smoke frame on the conveyor, providing a unified reference point for lifting and side-pushing positioning.

[0013] Further describing the aforementioned solution, the elevator employs a motor-driven chain lifting mechanism. Several sensors are installed on the elevator to detect the position of the cigarette frame. The support plate is connected to the chain via a lifting plate, and the lifting plate is mounted on a vertical guide rail on a support via a slider, moving up and down along the guide rail. The locking mechanism includes a locking cylinder, a locking plate, and a locking support. The locking cylinder is mounted on the locking support, and its piston rod is connected to the locking plate, driving the locking plate to lock the bottom of the cigarette frame. The motor drives the chain to rotate, causing the lifting plate to move up and down along the vertical guide rail. The support plate on the lifting plate rises and falls synchronously to support the cigarette frame. Sensors on the elevator detect the position of the cigarette frame in real time and feed back to the control system to adjust the lifting height. When the cigarette frame reaches the stacking position, the locking cylinder drives the locking plate to extend and lock the bottom of the cigarette frame, preventing it from falling. Then, the elevator reverses, lowering the lifting plate to its original position to support the next cigarette frame.

[0014] Further describing the aforementioned solution, the positioning mechanism includes a positioning cylinder, an upper guide bar, clamping plates, and a lower guide bar. The upper guide bar is connected to the piston end of the positioning cylinder. The upper guide bar has two movable holes, and the ends of the two clamping plates are inserted into the movable holes through cylinders. The cylinders in the middle of the two clamping plates are inserted into the circular holes of the lower guide bar, and the lower guide bar is mounted on the base. The positioning cylinder pushes the upper guide bar, thereby causing the clamping plates to clamp or open, thereby positioning the top column of the cigarette frame, ensuring that the columns of the upper and lower cigarette frames are aligned, and preventing tilting and collapse during stacking.

[0015] Further description of the aforementioned solution: the feed inlet of the conveyor adopts a flared positioning structure, with the inlet width being greater than the internal width, reducing the positioning difficulty during manual feeding.

[0016] Further description of the aforementioned solution: the discharge side of the elevator is equipped with a protective guardrail to prevent the stacked smoke frames from tipping over and to improve the safety of equipment operation.

[0017] A further description of the aforementioned solution also includes a control device, which is electrically connected to the solenoid valves of the motor, sensor, and cylinder. The control device receives sensor signals and outputs electrical signals to control the start and stop of the motor and the sequence of cylinder actions. Through a preset program, the coordinated linkage of each mechanism is realized. Fully automated control replaces manual operation, reduces human error, and improves stacking efficiency by 3-5 times.

[0018] Compared with the prior art, the present invention has the following significant advantages:

[0019] This device automates the entire process of smoke frame conveying, positioning, and stacking through an automated mechanism, completely eliminating reliance on manual forklift operation and solving the problem of skilled workers' absence affecting stacking progress.

[0020] The device uses a combination of "blocking-lifting-side pushing" actions. The blocking mechanism is precisely triggered by sensors to position the reference point, the lifting mechanism lifts the smoke frame away from the conveyor, and the two side pushing mechanisms push the smoke frame laterally to center it. This eliminates positional deviations during the smoke frame conveying process, ensures lateral alignment accuracy during stacking, and solves the problem of smoke frame collapse caused by misalignment during manual stacking.

[0021] The hoist is equipped with a positioning mechanism and a locking mechanism. The positioning mechanism clamps the top column of the smoke frame with a clamping plate to ensure that the columns of the upper and lower smoke frames are precisely aligned. The locking mechanism locks the bottom of the smoke frame when it is raised to the predetermined position. Together with the protective railing, it effectively prevents the smoke frame from tipping over during the stacking process and significantly reduces safety risks.

[0022] The control equipment enables coordinated operation of various mechanisms through preset programs. Fully automated control reduces human error, stacking efficiency is 3-5 times higher than manual operation, and stability is not affected by personnel changes. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the conveyor and smoke frame provided in an embodiment of the present utility model;

[0026] Figure 3 A schematic diagram of the installation of the side-pushing mechanism, lifting mechanism, and blocking mechanism provided in an embodiment of this utility model;

[0027] Figure 4 A front view of the conveyor provided in an embodiment of this utility model;

[0028] Figure 5 A schematic diagram of the lifting mechanism structure provided in this embodiment of the utility model;

[0029] Figure 6 A schematic diagram of the blocking mechanism structure provided in this embodiment of the utility model;

[0030] Figure 7 A schematic diagram of the side-push mechanism provided in an embodiment of this utility model;

[0031] Figure 8 This is a schematic diagram of the lower part of the hoist provided in an embodiment of the present utility model;

[0032] Figure 9 This is a schematic diagram of the installation of the lifting plate and the support plate provided in an embodiment of the present utility model;

[0033] Figure 10 A schematic diagram of the positioning mechanism provided in an embodiment of this utility model;

[0034] Figure 11 A schematic diagram of the positioning mechanism, locking mechanism, and tray installation provided for an embodiment of this utility model;

[0035] Figure 12 This is a schematic diagram of the carding mechanism structure provided in an embodiment of the present utility model;

[0036] Figure 13 This is a front view of the hoist provided in an embodiment of the present utility model.

[0037] The following are the labeling elements in the figure:

[0038] 1. Conveyor; 11. Support; 12. Chain; 13. Motor; 2. Side Push Mechanism; 21. Side Push Support; 22. Side Push Cylinder; 3. Lifting Mechanism; 31. Lifting Cylinder Support; 32. Lifting Cylinder; 33. Roller; 4. Blocking Mechanism; 41. Blocking Support; 42. Guide Rail; 43. Slider; 44. Blocking Plate; 5. Elevator; 51. Lifting Plate; 511. Pallet; 52. Positioning Mechanism; 521. Positioning Cylinder; 522. Positioning Plate; 523. Positioning Support; 53. Positioning Mechanism; 531. Positioning Cylinder; 532. Upper Guide Bar; 5321. Movable Hole; 533. Clamping Plate; 534. Lower Guide Bar; 535. Positioning Support; 54. Counterweight; 6. Smoke Frame; 61. Support Leg.

[0039] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0041] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0042] Please see Figures 1-13 As shown, this automatic tobacco frame stacking device mainly consists of two core pieces of equipment: a conveyor 1 and a hoist 5. It is equipped with sensors, a lifting mechanism 3, a side-pushing mechanism 2, a blocking mechanism 4, a locking mechanism 52, a positioning mechanism 53, and control equipment, enabling fully automated operation of the tobacco frames 6 from conveying and positioning to lifting and stacking. During operation, the tobacco frames 6 are first horizontally positioned by the conveyor 1, and then vertically stacked by the hoist 5. All mechanisms work together under the coordination of the control equipment to ensure a precise, efficient, and safe stacking process.

[0043] Conveyor 1 serves as the horizontal transport carrier for the smoke frames 6. It employs a frame-type support 11 welded from Q235B steel, with adjustable anchor bolts at the bottom to adapt to ground flatness. In this embodiment, three conveyors 1 are connected end-to-end, with guardrails on both sides to prevent the smoke frames 6 from shifting and falling. Its transmission system uses a C2082 model chain 12 with a double-row sprocket structure, consisting of two single-row roller chains connected by a connecting plate. The chain pitch is 25.4mm, and the breaking load of a single-row chain exceeds 30kN. The double-row design increases the load-bearing capacity by more than 40%, enabling stable transport of a fully loaded smoke frame 6 weighing 1.5 tons. Both the driving and driven sprockets are made of 45# steel with a hardened tooth surface hardness of HRC45-50. The center distance between the two sprockets is adjusted via a tensioning device to ensure appropriate chain tension. A U-shaped wear-resistant cast iron guide rail is installed below chain 12, with a hard chrome plated surface and a roughness Ra≤1.6μm to reduce running friction resistance. The drive motor 13 is a three-phase asynchronous motor Y132M-4 with a power of 5.5kW and a rated speed of 1440r / min, equipped with a frequency converter to achieve stepless speed regulation from 0-10m / min. The motor is connected to a cycloidal pinwheel reducer through a flexible coupling with a reduction ratio of 29 and an output speed of 50r / min, ensuring that the linear speed of chain 12 is stable at 0.8m / s. An electromagnetic brake is installed at the output shaft end of the reducer, and the braking distance is ≤50mm when power is off. As shown in Figure 1, the feeding port of conveyor 1 adopts a trumpet-mouth positioning structure, with an inlet width of 2m and an internal width of 1.8m, made of 2mm thick stainless steel plate bent into shape. The two sides form an angle of 30° with the horizontal plane, which can guide the smoke frame 6 to enter smoothly and reduce the difficulty of manual feeding and positioning.

[0044] As shown in Figures 3 and 6, the blocking mechanism 4 is installed in the center of the conveyor 1, 100mm in front of the lifting mechanism 3. The blocking support 41 is a Q235B frame, which is fixed to the bracket 11 of the conveyor 1 with bolts. The guide rail 42 consists of two HIWINHGR20 linear guide rails, each equipped with two GCr15 material sliders 43 with a surface hardening hardness of HRC58-62. The sliders 43 are fixed to the blocking plate 44 through a connecting plate. The blocking plate 44 is installed perpendicular to the forward direction of the smoke frame 6 and is driven to rise and fall by an SC-63×200 cylinder with a working pressure of 0.5MPa. The piston rod is hinged to the connecting plate of the slider 43. When it rises, it blocks the smoke frame 6. When it falls to 50mm below the upper surface of the chain 12, it releases the blockage. The PNP type Ni15-M30-AZ3X proximity sensor above detects the position of the blocking plate 44.

[0045] As shown in Figures 3, 4, and 7, the side-pushing mechanism 2 is installed on both sides of the middle of the conveyor 1. The side-pushing support 21 is welded with 10mm thick L-shaped steel plate of Q345B material, and the bottom is bolted to the support of the conveyor 1. The side-pushing cylinder 22 is selected from the SC series SC-100×150 model, with a cylinder diameter of 100mm, a stroke of 150mm, a working pressure of 0.5-0.8MPa, and buffer devices at both ends with a buffer stroke of 20mm. The piston rods of the two cylinders are set opposite each other. When the lifting mechanism 3 pushes the smoke frame 6 away from the conveyor 1, the two cylinders extend synchronously, and the piston rod pushes the smoke frame 6 to move laterally to the center at a speed of 50mm / s. After reaching the center, it stays for 2s, and after completing the positioning, it retracts at a speed of 80mm / s.

[0046] As shown in Figures 3 and 5, the lifting mechanism 3 is located in the center of the conveyor 1. The lifting cylinder support 31 is a 45# steel "T" shaped structure, and the base plate is bolted to the support 11 of the conveyor 1. The lifting cylinder 32 is a heavy-duty MA-125×100 model with a cylinder diameter of 125mm and a stroke of 100mm. It adopts a magnetic couple design, with an internal polyurethane Y-type sealing ring lip hardness of HS85±5. The inner surface of the cylinder is hard anodized, and air buffer devices are provided at the upper and lower ends. The lifting buffer stroke is 10mm, and the lowering buffer stroke is 15mm. The roller 33 is a cylinder with a diameter of 80mm and a length of 300mm. The surface is covered with a 2mm thick HS70±5 hardness polyurethane rubber layer, and it is mounted on the fixed plate at the end of the cylinder piston rod through deep groove ball bearings 6205 at both ends. When the sensor detects that the smoke frame 6 is in position, the cylinder piston rod extends and drives the roller 33 to rise, pushing the smoke frame 6 about 30mm away from the chain 12. After positioning is completed, it retracts, and the roller 33 descends, causing the smoke frame 6 to fall back to the chain 12 for continued conveying.

[0047] As shown in Figures 8, 9, 11, and 13, the hoist 5 is a vertical lifting device installed above the conveyor 1, 6m high, and fixed at the bottom with anchor bolts. It has 3m long HIWIN HGW30CA vertical guide rails on both sides, with a precision grade of P. The lifting plate 51 is a Q345B rectangular steel plate, with its four corners mounted on the guide rails via HIWIN HGW30CC sliders. A support plate 511 is vertically mounted on its upper surface, and its position is adjustable. A 5mm thick rubber pad is laid on the upper surface of the support plate 511, which is fixed to the lifting plate 51 with bolts. The lifting plate 51 is driven by a Y160M-4 model 11kW motor, equipped with a planetary gear reducer with a reduction ratio of 30, a lifting speed of 0.3m / s, and a C2120 model chain with a breaking load ≥80kN. There are two chains on each side, with a safety factor ≥6.

[0048] As shown in Figures 8, 11, and 12, the positioning support 523 of the positioning mechanism 52 is installed on both sides of the frame of the hoist 5. The positioning cylinder 521 is a model SC-125×100, with a cylinder diameter of 125mm, a stroke of 100mm, and a working pressure of 0.6MPa, and is installed on the support. The positioning plate 522 is a 300mm×100mm×15mm rectangular steel plate of 45# steel. When the smoke frame 6 is raised to the stacking position, the cylinder extends, and the positioning plate 522 locks the bottom edge of the smoke frame 6, suspending the smoke frame 6 in the air.

[0049] As shown in Figures 8, 10, and 11, the positioning support 535 of the positioning mechanism 53 is installed 100mm below the clamping mechanism 52. The lower guide bar 534 is a long strip of steel plate, installed on the upper surface of the support, with a round hole on top for mounting the central cylinder of the clamping plate 533. The upper guide bar 532 has the same dimensions as the lower guide bar 534 and is driven left and right by the positioning cylinder 531. It has two elongated oval movable holes 5321 on top, which are inserted into the end cylinders of the clamping plate 533. The clamping plate 533 is made of two 45# steel plates with a surface hardening hardness of HRC45-50. The 20mm diameter cylinders at the ends are inserted into the movable holes 5321 of the upper guide bar 532, and the central cylinder is inserted into the round hole of the lower guide bar 534. When the positioning cylinder 531 pushes the upper guide bar 532, the clamping plate 533 rotates around the central cylinder to clamp or open the top column of the smoke frame 6. The clamping force is adjusted by the cylinder pressure, and the positioning accuracy is ≤5mm. The positioning cylinder 531 is model SC-80×50, with a cylinder diameter of 80mm, a stroke of 50mm, and a working pressure of 0.5MPa.

[0050] In some embodiments, the other end of the chain of the hoist 5 is connected to a 1.2-ton cast iron counterweight 54, which is balanced with the lifting plate 51 through a pulley system. This counteracts the gravity of the smoke frame 6, reducing the motor load and extending the motor's lifespan. The smoke frame 6 has a folding structure, with cup-shaped support feet 61 at the lower ends of the four corner columns for positioning and connection between upper and lower layers.

[0051] The control equipment adopts a Siemens S7-200 SMART PLC system with an ST40 CPU, equipped with digital input / output modules, analog input modules, and communication modules, and is electrically connected to motors, sensors, cylinders, and solenoid valves. Conveyor 1 is equipped with four PNP-type Ni15-M30-AZ3X proximity sensors located at the feed inlet, in front of lifting mechanism 3, at the side push mechanism 2, and at the entrance of elevator 5, with a detection distance of 15mm and a response time ≤10ms. Elevator 5 is equipped with three E3Z-D62 photoelectric sensors located at the bottom, middle stacking position, and top, with a detection accuracy of ±1mm. Each cylinder is equipped with a D-C73 magnetic switch at both ends to detect the piston rod's position.

[0052] During operation, the forklift places the smoke frame 6 at the feed inlet of conveyor 1, guiding it in through the flared opening. The smoke frame 6 is then conveyed by chain 12. When the proximity sensor detects that the smoke frame 6 has reached the front of the lifting mechanism 3, the blocking plate 44 rises to block it, the lifting cylinder 32 extends, and the roller 33 pushes the smoke frame 6 away from chain 12. Simultaneously, the side push cylinder 22 extends to push the smoke frame 6 laterally to center it. After positioning, the blocking plate 44 descends, the roller 33 falls back, and the smoke frame 6 continues to be conveyed to below the elevator 5.

[0053] After the sensor on the elevator 5 detects the smoke frame 6, the conveyor 1 stops, the lifting motor 13 starts, and the lifting plate 51 lifts the first smoke frame 6 upwards. When it reaches the first stacking position, the locking plate 522 extends and locks the first smoke frame 6, and the elevator 5 descends to reset and receive the next smoke frame 6. After the second smoke frame 6 arrives, the clamping plate 533 of the positioning mechanism 53 clamps the top column of the second smoke frame 6, aligning it with the support leg 61 of the first smoke frame 6. The elevator 5 starts again, lifting the second smoke frame 6 to the second stacking position, and the locking plate 522 extends and locks it again. This operation can be repeated to stack 3-5 smoke frames 6. The stacking layer can be set by adding a counting sensor. After completion, the smoke frames are removed by a forklift.

[0054] The discharge side of the elevator 5 is equipped with a 1.5m high steel pipe protective railing. The control equipment has overload protection, emergency stop button and fault alarm function: the motor 13 will automatically stop if the current exceeds the rated value by 1.5 times, and the emergency stop button can immediately stop all mechanism actions.

[0055] The device improves stacking efficiency by 3-5 times compared to manual stacking, with a lateral positioning accuracy of ≤3mm, a maximum stacking capacity of 5 layers, a total motor power of 16.5kW, and compressed air consumption of 0.3m³ / min. Daily maintenance requires checking cylinder operation and leaks, chain tension, and cleaning debris from the equipment. Regular lubrication of the guide rails and chains is necessary, along with checking sensor detection distances and testing motor insulation resistance. Annual comprehensive overhaul and replacement of worn parts are required to ensure equipment performance. This device automates, refines, and ensures the safety of tobacco frame stacking, solving the problems of low efficiency and poor safety associated with manual stacking. It is suitable for temporary storage and stacking of tobacco frames during tobacco re-drying processing, offering significant economic and social benefits.

[0056] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the foregoing claims.

[0057] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. An automatic stacking device for selected tobacco frames, characterized in that: The system includes a conveyor (1) and an elevator (5). A sensor, a lifting mechanism (3), a side-pushing mechanism (2), and a blocking mechanism (4) are installed on the conveyor (1) located at the entrance of the elevator (5). The blocking mechanism (4) and the lifting mechanism (3) are installed in the center of the conveyor (1). When the sensor detects that the smoke frame (6) has reached the designated position, the blocking plate (44) of the blocking mechanism (4) rises to restrict the smoke frame (6) from moving forward, and the roller (33) of the lifting mechanism (3) pushes the smoke frame (6) away from the conveyor. The machine (1) and the two side push mechanisms (2) work synchronously to center the cigarette frame (6). Then the blocking plate (44) and the roller (33) descend, and the cigarette frame (6) is transported to the bottom of the elevator (5). The elevator (5) is equipped with a support plate (511), a locking mechanism (52) and a positioning mechanism (53). The support plate (511) is used to support the bottom of the cigarette frame (6), the positioning mechanism (53) positions the top of the cigarette frame (6), and the locking mechanism (52) locks and fixes the cigarette frame (6) that has risen to the predetermined position.

2. The automatic stacking device for selected tobacco frames according to claim 1, characterized in that: The conveyor (1) includes a support (11), a chain (12) and a motor (13) for driving the chain (12), wherein the chain (12) is a double-row sprocket structure.

3. The automatic stacking device for selected tobacco frames according to claim 1, characterized in that: The lifting mechanism (3) includes a lifting cylinder support (31), a lifting cylinder (32) and a roller (33). The lifting cylinder (32) is mounted on the lifting cylinder support (31), and its piston rod is connected to the roller (33). The roller (33) is driven to rise and fall by the lifting cylinder (32). The roller (33) is parallel to the forward direction of the smoke frame (6).

4. The automatic stacking device for selected tobacco frames according to claim 1, characterized in that: The side-push mechanism (2) includes a side-push support (21) and a side-push cylinder (22). The side-push cylinder (22) is installed on the side-push support (21). The piston rods of the two side-push cylinders (22) are arranged opposite to each other. The cylinders extend and retract to push the smoke frame (6) to be centered laterally.

5. The automatic stacking device for selected tobacco frames according to claim 1, characterized in that: The blocking mechanism (4) includes a blocking support (41), a cylinder, a guide rail (42), a slider (43), and a blocking plate (44). The guide rail (42) is fixed on the blocking support (41). The cylinder drives the slider (43) and the blocking plate (44) connected to each other to rise or fall along the guide rail (42).

6. The automatic stacking device for selected tobacco frames according to claim 1, characterized in that: The lifting machine (5) is driven by a motor (13) to lift the chain. Several sensors are installed on the lifting machine (5) to detect the position of the cigarette frame (6). The pallet (511) is connected to the chain through the lifting plate (51), and the lifting plate (51) is installed on the vertical guide rail on the bracket through the slider and moves up and down along the guide rail. The positioning mechanism (52) includes a positioning cylinder (521), a positioning plate (522) and a positioning support (523). The positioning cylinder (521) is installed on the positioning support (523), and its piston rod is connected to the positioning plate (522). The positioning cylinder (521) drives the positioning plate (522) to lock the bottom of the cigarette frame (6).

7. The automatic stacking device for selected tobacco frames according to claim 1, characterized in that: The positioning mechanism (53) includes a positioning cylinder (531), an upper guide bar (532), a clamping plate (533), and a lower guide bar (534). The upper guide bar (532) is connected to the piston end of the positioning cylinder (531). The upper guide bar (532) has two movable holes (5321). The ends of the two clamping plates (533) are inserted into the movable holes (5321) through cylinders. The cylinders in the middle of the two clamping plates (533) are inserted into the round holes of the lower guide bar (534), and the lower guide bar (534) is mounted on the base. The positioning cylinder (531) pushes the upper guide bar (532) to drive the clamping plate (533) to clamp or open, thereby achieving the positioning of the top column of the cigarette frame (6).

8. The automatic stacking device for selected tobacco frames according to claim 1, characterized in that: The feed inlet of the conveyor (1) adopts a flared mouth positioning structure.

9. The automatic stacking device for selected tobacco frames according to claim 1, characterized in that: The discharge side of the elevator (5) is equipped with a guardrail to prevent the stacked smoke frames (6) from tipping over.

10. The automatic stacking device for selected tobacco frames according to any one of claims 1-9, characterized in that: It also includes a control device, which is electrically connected to the solenoid valves of the motor, sensor, and cylinder.

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