Vertical pressing of the claimed cigarette stacking unit overall rotation method

Abstract

The vertical pressure involved in the cigarette stacking unit overall rotation method is based on the vertical pressure of the involved cigarette packing machine assembly, which is used to drive the stacking unit to make horizontal rotary motion; the vertical pressure of the involved cigarette packing machine assembly includes a lower turntable device and an upper pressure disc device; the upper pressure disc device includes an upper pressure disc and a rotary lifting drive assembly; the rotary lifting drive assembly includes a motor A, a nut, a lead screw, a guide seat, a limit block, a stop block and a spring; the upper pressure disc rotates against the rotation limit of the limit block, and the minimum torque required is T1; the upper pressure disc and the lead screw rotate relative to each other, and the minimum torque required is T2; the maximum torque output by the motor A is T3; then T3>T1>(1+a)T2; the method is as follows: 1, stacking the stacking unit; 2, driving the stacking unit to rotate. The present application can realize the overall rotation of the stacking unit on the lower turntable, and provides necessary method and structure support for realizing the automatic film wrapping and packaging of the involved cigarette.

Description

Technical Field

[0001] This invention relates to the field of automated packaging technology for cigarettes involved in the case, and in particular to a method for rotating the entire stacking unit of cigarettes involved in the case under vertical pressure. Background Technology

[0002] Due to the need for high-quality development in the tobacco industry, the work of combating counterfeit and smuggled cigarettes under the tobacco monopoly system is also facing many new problems and challenges.

[0003] On the one hand, after inspectors seize the cigarettes involved in the case, they are still at the stage of manual counting and packing, which is time-consuming, labor-intensive, and inefficient. On the other hand, before the packed cigarettes are sent to the warehouse for storage, they still need to be manually verified and registered. This management method is relatively crude and primitive, and is prone to errors and omissions. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for rotating the entire stacking unit of cigarettes under vertical pressure. Based on the vertical pressure and rotation assembly of the cigarette packing machine, it solves the problem that the counting, packing, verification and registration of cigarettes under case are currently all done manually, which is inefficient and prone to errors.

[0005] The technical solution of the present invention is: a method for rotating the entire stacking unit of the cigarettes involved in the case by vertical pressure, based on the vertical pressure and rotation assembly of the cigarette packing machine involved in the case, used to drive the stacking unit to perform horizontal rotational motion;

[0006] The vertical pressing assembly of the cigarette packing machine involved in the case includes a housing, a lower turntable device, and an upper pressing plate device;

[0007] The outer shell has an inner cavity for containing cigarettes, and the top of the inner cavity has a cylindrical cavity that communicates with the inner cavity.

[0008] The lower turntable device includes a lower turntable and a bearing; the lower turntable is rotatably mounted on the bottom surface of the inner cavity of the housing via the bearing, and the lower turntable rotates in the horizontal plane via the bearing. A horizontally arranged rectangular platform is provided in the central area of ​​the lower turntable.

[0009] The upper pressure plate device includes an upper pressure plate and a rotary lifting drive assembly. The upper pressure plate is installed in the upper part of the inner cavity of the housing via the rotary lifting drive assembly, and is located directly above the rectangular platform. The upper pressure plate moves vertically up and down or rotates horizontally under the drive of the rotary lifting drive assembly. The upper pressure plate is a hollow cylinder with an open upper end, including a main plate and a central cylinder fixedly connected to the center of the main plate and arranged axially. The outer wall of the main plate is provided with an axially extending limiting groove. The rotary lifting drive assembly includes a motor A, a nut, a lead screw, a guide seat, a limiting block, a stop block, and a spring. The motor A is fixedly installed on the top of the housing, and its shaft extends vertically downward. The nut is fixedly installed on the upper end of the central cylinder of the upper pressure plate, and the axis of its inner hole coincides with the axis of the inner hole of the central cylinder. The upper end of the lead screw passes through... The upper pressure plate is connected to the shaft of motor A via a coupling. The middle part of the lead screw is screwed into the nut, and the lower end of the lead screw extends into the inner hole of the central cylinder of the upper pressure plate. The guide seat is fixedly installed on the top of the outer shell, and has a cavity for accommodating the limiting block. One end of the cavity is connected to the cylindrical cavity of the outer shell. The limiting block is slidably installed on the end of the cavity of the guide seat that is relatively close to the cylindrical cavity. The abutment is fixedly connected to the end of the guide seat that is relatively far away from the cylindrical cavity. The spring is compressed in the cavity of the guide seat, and its two ends abut against the limiting block and the abutment respectively. The spring force forces the front end of the limiting block to extend into the cylindrical cavity and press it against the outer wall of the upper pressure plate. As the upper pressure plate rotates, when the limiting groove of the upper pressure plate is aligned with the front end of the limiting block, the limiting block is embedded in the limiting groove of the upper pressure plate under the action of the spring force.

[0010] The minimum torque required for the upper pressure plate to overcome the rotation restriction of the limit block and slide out of the limit groove on the outer wall of the upper pressure plate is T1; the minimum torque required for the upper pressure plate and the lead screw to rotate relative to each other is T2; the maximum torque output by motor A is T3; then, T3>T1>(1+a)T2; a is the safety factor, which takes a value of 0.1~0.5;

[0011] Before the method is executed, the vertical pressing assembly of the cigarette packing machine in question is in an initial state; in the initial state: the upper pressing plate is in the height range of 90%-100% of its travel stroke, and the front end of the limiting block is embedded in the limiting groove of the upper pressing plate;

[0012] The method is as follows:

[0013] S01, Stacking and palletizing unit:

[0014] Stacking units on the rectangular platform of the lower turntable, ensuring that the four sides of the lower surface of the stacking unit are parallel to the four sides of the rectangular platform, and that the lower surface of the stacking unit is completely enclosed by the rectangular platform.

[0015] In this step, the palletizing unit is a cuboid formed by stacking cigarettes of the same size;

[0016] S02, drive the palletizing unit to rotate:

[0017] Motor A is started to drive the lead screw to rotate, which in turn drives the nut and the upper pressure plate to move downward along the lead screw. When the upper pressure plate is not in contact with the palletizing unit, the torque output by motor A is T2. At this time, the torque is sufficient to drive the lead screw and the upper pressure plate to rotate relative to each other, but insufficient to make the upper pressure plate overcome the limitation of the limit block to rotate. Therefore, the upper pressure plate only moves vertically. After the upper pressure plate contacts the palletizing unit, the upper pressure plate has no downward height, so the lead screw and the nut cannot rotate relative to each other to form a whole. Since motor A is still outputting power, the torque output by motor A suddenly increases from T2 to T1. When the torque reaches T1, the upper pressure plate overcomes the limitation of the limit block and begins to rotate, and drives the palletizing unit and the lower turntable to rotate synchronously through the clamping force.

[0018] A further technical solution of the present invention is: the guide seat is provided with a threaded hole at one end that is relatively far away from the cylindrical cavity; correspondingly, the abutment is a bolt connected in the threaded hole, one end of which is located outside the guide seat and the other end extends into the guide seat; the compression degree of the spring can be adjusted by turning the bolt, thereby realizing the adjustment of torque T1.

[0019] A further technical solution of the present invention is as follows: the lower turntable device further includes a counter; the counter includes a signal receiving device and a signal transmitting device; the signal receiving device is fixedly installed on the lower surface of the lower turntable and rotates in a circle as the lower turntable rotates; the signal transmitting device is fixedly installed on the bottom surface of the inner cavity of the outer shell and is located directly below the rotation path of the signal receiving device; the counter is used to record the number of rotations of the lower turntable and determine the rotation angle of the lower turntable.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. Based on the vertical pressing and turning assembly of the cigarette packing machine involved in the case, it can realize the overall rotation of the stacking unit (i.e., the stacked cigarette strips) on the lower turntable, providing the necessary method and structural support for realizing the automated wrapping and packing of the cigarettes involved in the case.

[0022] 2. The limiting groove on the outer wall of the upper pressure plate forms an embedded fit with the front end of the limiting block, and the torque relationship T3 > T1 > (1+a)T2 is adopted. Based on the above design, during the activation of the pressing function of the upper pressure plate device, as the upper pressure plate moves downward, it will not rotate until a certain pressing force is reached between the upper pressure plate and the palletizing unit. It will only move vertically. Only when the pressing force between the upper pressure plate and the palletizing unit reaches or exceeds the critical value can the upper pressure plate rotate, thereby driving the palletizing unit and the lower turntable below it to rotate synchronously through the pressing force. This can effectively avoid relative rotation between the upper pressure plate and the palletizing unit due to insufficient pressing force, which could cause the upper surface of the palletizing unit to rub against it, resulting in the palletizing unit becoming loose and collapsing, the palletizing unit and the lower turntable shifting, and the cigarette packaging wrinkling and breaking. This greatly improves the reliability and stability of the palletizing unit packaging process.

[0023] 3. The stop block is a bolt connected to the threaded hole of the guide seat, with one end located outside the guide seat and the other end extending into the guide seat. Based on this design, the compression degree of the spring can be adjusted by turning the bolt, thereby realizing the adjustment of the "clamping force applied by the stop block to the upper pressure plate".

[0024] 4. The counter installed on the lower turntable device is used to record the number of rotations of the lower turntable and determine the rotation angle of the lower turntable. On the one hand, it realizes precise control of the amount and thickness of the film being wrapped, and on the other hand, it provides the necessary decision-making basis for the timing of the cutter lifting the cutter to cut the film.

[0025] The cigarette packaging machine involved in the case has the following advantages:

[0026] 1. After stacking the cigarettes (unopened cigarettes with outer packaging boxes) into a standard cuboid, the cuboid is fixed in height by two constraint frames. Then, through the cooperation of a lower turntable device, an upper pressure plate device, and a sealing device, the side walls of the cuboid are wrapped with film to fix it, ultimately forming a standard-shaped, sturdy, non-scattering, and easy-to-transport and store palletizing unit. On the one hand, the number of rows and columns of cigarettes inside the palletizing unit can be seen directly through the film, allowing for a quick calculation of the number of cigarettes contained in the unit, greatly improving the efficiency of manual counting. On the other hand, the types of cigarettes inside the palletizing unit can be seen directly through the film without disassembling the unit, greatly improving the efficiency of manual verification during storage. Furthermore, compared to manual packing, the above-mentioned semi-automated packing method greatly improves the packing efficiency of the cigarettes in question.

[0027] 2. The constraint frame is used for vertical positioning constraints on the palletizing unit. It features a simple structure, easy assembly, and adjustable dimensions. In use, two constraint frames are installed on two opposite side walls of the palletizing unit. The dimensions of the constraint frames are then adjusted according to the size of the palletizing unit, ensuring that the four spatial limiting angles of the constraint frames cover the four apex corners of the palletizing unit. Because of the constraint frame, the palletizing unit only needs to be fixed with film wrapping on the four side walls (i.e., horizontal film wrapping), eliminating the need for film wrapping on the four surfaces including the top and bottom surfaces (i.e., vertical film wrapping). This significantly reduces the amount of film used and lowers the difficulty of unsealing the palletizing unit.

[0028] 3. After the male component and the female component are connected, the male mating end of the male component and the female mating end of the female component form a sliding connection. The sliding connection is formed by the interaction of two protrusions (located on the male mating end) on two strips and two sliding grooves (located on the female mating end) on a folded plate. There are two sets of protrusion / sliding groove sliding structures. The arrangement directions of these two sets of sliding structures are perpendicular to each other, which ensures the stability of the sliding process and improves the firmness of the sliding connection.

[0029] The present invention will be further described below with reference to the figures and embodiments. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the vertical pressing and turning assembly of the cigarette packing machine involved in the case;

[0031] Figure 2 This is an exploded view of the upper pressure plate device;

[0032] Figure 3 for Figure 2 Enlarged view of part A;

[0033] Figure 4 This is a schematic diagram of the structure of the cigarette packing machine involved in the case;

[0034] Figure 5 This is a schematic diagram of the lower turntable device;

[0035] Figure 6 This is a schematic diagram of the constraint frame structure;

[0036] Figure 7 An exploded view of the constraint frame;

[0037] Figure 8 for Figure 7 Enlarged view of part B;

[0038] Figure 9 This is a schematic diagram of the initial state of the packaging method;

[0039] Figure 10 This is a schematic diagram of the first state in step b of the packaging method S02.

[0040] Figure 11 This is a schematic diagram of the second state in step b of the packaging method S02.

[0041] Figure 12 A schematic diagram of the state of step c in packaging method S02;

[0042] Figure 13 This is a schematic diagram of the state of the cutter before it falls in step d of step S02 of the packaging method.

[0043] Figure 14 This is a schematic diagram of the state of the cutting blade after it falls in step d of the packaging method S02.

[0044] illustrate: Figure 10 In the middle, the lower turntable drove the palletizing unit to rotate 0.25 revolutions; Figure 11 and Figure 12 In the middle, the lower turntable drove the palletizing unit to rotate 9.25 times; Figure 12 and Figure 13 In the middle, the lower turntable drove the palletizing unit to rotate 10 full revolutions.

[0045] Legend: Outer shell 1; Cylindrical cavity 11; Lower turntable 21; Bearing 22; Rectangular platform 211; Upper pressure plate 31; Main body plate 311; Limiting groove 3111; Center cylinder 312; Motor A 32; Nut 33; Lead screw 34; Guide seat 35; Cavity 351; Limiting block 36; Abutment block 37; Spring 38; Roller 411; Plastic sealing film 412; Knife holder 42; Cutting knife 43; Male component 51; Right angle groove A 511; Spatial limiting angle A 512; Strip notch A 513; Strip plate 514; Protrusion 515; Female component 52; Right angle groove B 521; Spatial limiting angle B 522; Strip notch B 523; Folding plate 524; Slide groove 525; Printer 6. Detailed Implementation

[0046] Example 1:

[0047] like Figure 1-3 As shown, the vertical pressing and rotating assembly of the cigarette packing machine involved in the case includes a housing 1, a lower turntable device, and an upper pressing plate device.

[0048] The outer casing 1 has an internal cavity for accommodating cigarettes, and one side wall of the outer casing 1 has an opening that communicates with the internal cavity. The top of the internal cavity of the outer casing 1 has a cylindrical cavity 11 that communicates with the internal cavity of the outer casing 1.

[0049] The lower turntable device includes a lower turntable 21 and a bearing 22. The lower turntable 21 is rotatably mounted on the bottom surface of the inner cavity of the outer casing 1 via the bearing 22. The lower turntable 21 rotates in the horizontal plane via the bearing 21. The central area of ​​the lower turntable 21 is provided with a horizontally arranged rectangular platform 211. The area between the rectangular platform 211 and the upper pressure plate 31 is used for placing and packing cigarettes.

[0050] The upper pressure plate device includes an upper pressure plate 31 and a rotary lifting drive assembly. The upper pressure plate 31 is installed on the upper part of the inner cavity of the housing 1 via the rotary lifting drive assembly and is located directly above the rectangular platform 211. The upper pressure plate 31 moves vertically up and down or rotates horizontally under the drive of the rotary lifting drive assembly.

[0051] The upper pressure plate 31 is a hollow cylinder with an open upper end. It includes a main plate 311 and a central cylinder 312 fixedly connected to the center of the main plate 311 and arranged axially. The outer wall of the main plate 311 is provided with an axially extending limiting groove 3111.

[0052] The rotary lifting drive assembly includes a motor A32, a nut 33, a lead screw 34, a guide seat 35, a limiting block 36, a stop block 37, and a spring 38. The motor A32 is fixedly mounted on the top of the housing 1, with its shaft extending vertically downwards. The nut 33 is fixedly mounted on the upper end of the central cylinder 312 of the upper pressure plate 31, with the axis of its inner bore coinciding with the axis of the inner bore of the central cylinder 312. The upper end of the lead screw 34 is connected to the shaft of the motor A32 via a coupling, the middle part of the lead screw 34 is screwed onto the nut 33, and the lower end of the lead screw 34 extends into the inner bore of the central cylinder 312 of the upper pressure plate 31. The guide seat 35 is fixedly mounted on the top of the housing 1 and has a cavity 351 for accommodating the limiting block 36. One end of the cavity 351 communicates with the cylindrical cavity 11 of the housing 1. The limiting block 36 is slidably mounted on the end of the cavity 351 of the guide seat 35 that is relatively close to the cylindrical cavity 11. The abutment 37 is fixedly connected to the end of the guide seat 35 that is relatively far from the cylindrical cavity 11. The spring 38 is compressed and disposed in the cavity 351 of the guide seat 35, with its two ends abutting against the limiting block 36 and the abutment 37 respectively. Through its elastic force, the front end of the limiting block 36 is forced into the cylindrical cavity 11 and pressed against the outer wall of the upper pressure plate 31. As the upper pressure plate 31 rotates, when the limiting groove 3111 of the upper pressure plate 31 is aligned with the front end of the limiting block 36, the limiting block 36 is embedded in the limiting groove 3111 of the upper pressure plate 31 under the elastic force of the spring 38.

[0053] Preferably, the upper pressure plate 31 overcomes the rotation restriction of the limiting block 36, allowing the limiting block 36 to slide out of the limiting groove 3111 on the outer wall of the upper pressure plate 31, and the minimum torque required is T1; the upper pressure plate 31 rotates relative to the lead screw 34, and the minimum torque required is T2; the maximum torque output by the motor A32 is T3; then, T3>T1>(1+a)T2; a is a safety factor, with a value of 0.1~0.4.

[0054] Preferably, the guide seat 35 has a threaded hole 352 at the end that is away from the cylindrical cavity 11. Correspondingly, the abutment 37 is a bolt connected in the threaded hole 352, with one end located outside the guide seat 35 and the other end extending into the guide seat 35.

[0055] Preferably, the lower turntable device further includes a counter 23. The counter 23 includes a signal receiving device 231 and a signal transmitting device 232. The signal receiving device 231 is fixedly mounted on the lower surface of the lower turntable 21 and rotates in a circular motion as the lower turntable 21 rotates. The signal transmitting device 232 is fixedly mounted on the bottom surface of the inner cavity of the housing 1, located at the lower end of the lower turntable 21, and directly below the rotation path of the signal receiving device 231.

[0056] Briefly describe the working principle of the vertical pressing assembly of the cigarette packing machine involved in the case:

[0057] The vertical pressing and rotating assembly of the cigarette packing machine in question is used to drive the palletizing units (i.e., stacked cigarette strips) to rotate on the lower turntable 21. During operation, the palletizing units are stacked on the rectangular platform 211 of the lower turntable 21. On the one hand, this ensures that the four sides of the lower surface of the palletizing unit are parallel to the four sides of the rectangular platform 211, and on the other hand, it ensures that the lower surface of the palletizing unit is completely enclosed by the rectangular platform 211.

[0058] When motor A32 is started, it drives lead screw 34 to rotate, which in turn drives nut 33 and upper pressure plate 31 to move downward along lead screw 34. When upper pressure plate 31 is not in contact with the palletizing unit, the torque output by motor A32 is T2. This torque is sufficient to drive lead screw 34 to rotate relative to upper pressure plate 31, but insufficient to make upper pressure plate 31 overcome the restriction of limit block 36 to rotate. Therefore, upper pressure plate 31 only moves vertically. After upper pressure plate 31 contacts the palletizing unit, upper pressure plate 31 has no downward height, so lead screw 34 and nut 33 cannot rotate relative to each other. As the rotation forms a whole, since motor A32 is still outputting power, the torque output by motor A32 suddenly increases from T2 to T1. During this process, on the one hand, the clamping force applied by the upper pressure plate 31 to the palletizing unit gradually increases until it reaches or exceeds the critical value. At the critical value, the upper pressure plate 31 rotates, which drives the palletizing unit and the lower turntable 21 to rotate synchronously through the clamping force. On the other hand, when the torque reaches T1, the upper pressure plate 31 overcomes the restriction of the limit block 36 and begins to rotate, and drives the palletizing unit and the lower turntable 21 to rotate synchronously through the clamping force.

[0059] like Figure 1-8 As shown, the cigarette packing machine involved in the case includes a shell 1, a lower turntable device, an upper pressure plate device, a sealing device, and a constraint frame.

[0060] The structure, connection relationship, and relative position relationship of the outer casing 1, the lower turntable device, and the upper pressure plate device are as described above, and will not be repeated here.

[0061] The sealing device includes a film tube, a blade holder 42, a cutter 43, and a motor B44. The film tube is rotatably mounted in the inner cavity of the housing 1, and includes a vertically arranged roller 411 and a sealing film 412 wound around the roller 411 in turns. The blade holder 42 is fixedly mounted on the lower turntable 21 and is arranged adjacent to one side of the rectangular platform 211 on the outside of the rectangular platform 211. The cutter 43 is hingedly mounted on the lower turntable 21 and is located directly above the blade holder 42. The cutter 43 rotates about the hinge point in a vertical plane. When the cutter 43 rotates upward to form an angle with the horizontal plane, the cutter 43 separates from the blade holder 42. When the cutter 43 rotates downward to be parallel to the horizontal plane, the cutter 43 is in contact with the blade holder 42. The motor B44 is fixedly mounted on the lower turntable 21 and is associated with the hinge point of the cutter 43 to drive the cutter 43 to rotate about its hinge point, thereby achieving separation or contact with the blade holder 42.

[0062] The constraint frame is a closed rectangular frame, formed by two L-shaped male components 51 and two L-shaped female components 52 slidably connected to each other. Each male component 51 has perpendicularly arranged male mating portions at both ends. Each male mating portion has a right-angled groove A511 on the side facing the inside of the corner of the male component 51. The two right-angled grooves A511 meet at the corner of the male component 51, forming a spatial limiting angle A512. Similarly, each female component 52 has perpendicularly arranged female mating portions at both ends. Each female mating portion has a right-angled groove B521 on the side facing the inside of the corner of the female component 52. The two right-angled grooves B521 meet at the corner of the female component 52, forming a spatial limiting angle B522. In the constraint frame, each male component 51 is slidably connected to the female mating portion of one female component 52 through its male mating portions at both ends, and each female component 52 is slidably connected to the male mating portion of one male component 51 through its female mating portions at both ends. The constraint frame contains two spatial limiting angles A512 and two spatial limiting angles B522, which are collectively referred to as the four spatial limiting angles. The four spatial limiting angles are located at the four corners of the constraint frame, and the four spatial limiting angles are located on the same side of the plane enclosed by the constraint frame.

[0063] The male connector of the male component 51 is provided with a strip-shaped notch A513. The strip-shaped notch A513 is located at the intersection of the two groove walls of the right-angle groove A511 and extends from the far corner end (the end relatively far from the corner of the male component) to the near corner end (the end relatively close to the corner of the male component) of the male connector along the extension direction of the right-angle groove A511. Two strips 514 are formed on both sides of the strip-shaped notch A513. The two strips 514 are arranged perpendicular to each other and have protrusions 515 on their adjacent side walls.

[0064] The female docking part of the female component 52 is provided with two strip-shaped notches B523. The two strip-shaped notches B523 are respectively located at the two groove wall edges of the right angle groove B521, and extend from the far corner end (the end relatively far from the corner of the female docking part) to the near corner end (the end relatively close to the corner of the female docking part) along the extension direction of the right angle groove B521. The female docking part forms a folded plate 524 between the two strip-shaped notches B523. The folded plate 524 is provided with grooves 525 on the thickness surface on both sides.

[0065] When the male component 51 is slidably connected to the female component 52 through the male docking part, the two strips 514 of the male docking part of the male component 51 extend into the two strip-shaped notches B523 of the female docking part of the female component 52, and the angle plate 524 of the female docking part of the female component 52 extends into the strip-shaped notch A513 of the male docking part of the male component 51. The protrusion 515 of the male docking part of the male component 51 and the sliding groove 525 of the female docking part of the female component 52 are interlocked and fitted together to form a sliding connection.

[0066] Preferably, the cigarette packing machine also includes a handheld barcode scanner (not shown in the figure), a printer 6, and a PC (not shown in the figure). The handheld barcode scanner and the PC are connected via a data cable or wireless network. The printer and the PC are also connected via a data cable or wireless network. The cigarette information obtained by scanning the barcode of the cigarettes with the handheld barcode scanner is transmitted to the PC and displayed visually. After manual verification, the cigarette information is archived on the PC, and the PC controls the printer to start printing a sticker containing the information of the cigarettes in question. The sticker is then affixed to the packed palletizing unit to facilitate subsequent management of the cigarettes in question.

[0067] Preferably, the cutter 43 is a strip-shaped blade with a cutting edge on one side along its length, and the hinge of the cutter 43 is located at one end along its length. When the cutter 43 is in contact with the blade holder 42, the cutting edge of the cutter 43 is in contact with the blade holder 42.

[0068] Preferably, the outer corner of the male component 51 is provided with a positioning groove 516, and correspondingly, the outer corner of the female component 52 is provided with a positioning protrusion 526 that matches the shape of the positioning groove 516 of the male component 51. When the constraint frame is placed vertically, the two positioning grooves 516 and the two positioning protrusions 526 are arranged diagonally and located on the outer side of the four corners of the constraint frame, and all extend upward or recess downward in the vertical direction. Multiple vertically placed constraint frames can be stacked vertically through the cooperation of the positioning grooves 516 and the positioning protrusions 526.

[0069] like Figure 9-14As shown, the cigarette packing machine in question is used to pack the cigarettes involved in the case. Before packing, the cigarette packing machine is in an initial state; in the initial state:

[0070] a. The lower turntable 21 rotates until the signal receiving device 231 and the signal transmitting device 232 of the counter 23 are directly facing each other.

[0071] b. The upper pressure plate 31 is located in the height range of 90%-100% of its travel stroke, and the front end of the limiting block 36 is embedded in the limiting groove 3111 of the upper pressure plate 31.

[0072] c. After the plastic sealing film 412 on the roller 411 is pulled out from the outermost end, it is sandwiched between the cutter 43 and the cutter holder 42, and the cutter 43 and the cutter holder 42 are in a close fit.

[0073] The packaging method is as follows:

[0074] S01, Fabricating palletizing units:

[0075] a. After entering the information of the cigarettes involved in the case into the PC, stack cigarettes of the same size on a flat table to form a cuboid.

[0076] b. Install two constraint frames on the opposite side walls of the cuboid, and adjust the size of the constraint frames so that the four spatial limiting angles of each constraint frame respectively wrap around the four vertices of the cuboid. The two constraint frames wrap around a total of eight vertices of the cuboid, thus forming a stacking unit.

[0077] In this step, the cuboid contains multiple layers in the vertical direction, and each layer consists of multiple cigarettes arranged in a row next to each other.

[0078] In this step, the bottom surface of the palletizing unit can be completely enclosed by the rectangular platform 211 of the lower turntable 21, and the height of the palletizing unit is less than the space height between the upper pressure plate 31 and the lower turntable 21.

[0079] In this step, cigarettes of the same brand should be selected for stacking when they are of the same size.

[0080] In this step, information about the cigarettes in question is obtained by scanning with a handheld barcode scanner. This information includes the brand and batch number of the cigarettes.

[0081] S02, Wrapping and Packaging:

[0082] a. Place the palletizing unit on the rectangular platform 211 of the lower turntable 21. On the one hand, ensure that the four sides of the lower surface of the palletizing unit are parallel to the four sides of the rectangular platform 211 respectively. On the other hand, ensure that the lower surface of the palletizing unit is completely enclosed by the rectangular platform 211.

[0083] b. When motor A32 starts, it drives the lead screw 34 to rotate, which in turn drives the nut 33 and the upper pressure plate 31 to move downwards along the lead screw 34. When the upper pressure plate 31 is not in contact with the palletizing unit, the torque output by motor A32 is T2. This torque is sufficient to drive the lead screw 34 and the upper pressure plate 31 to rotate relative to each other, but insufficient to make the upper pressure plate 31 overcome the restriction of the limit block 36 and rotate. Therefore, the upper pressure plate 31 only moves vertically. After the upper pressure plate 31 contacts the palletizing unit, the upper pressure plate 31 has no downward height, so the lead screw 34 and the nut 33 cannot rotate relative to each other and thus cannot form a vertical movement. As a whole, since motor A32 is still outputting power, the torque output by motor A32 suddenly increases from T2 to T1. During this process, on the one hand, the clamping force applied by the upper pressure plate 31 to the palletizing unit gradually increases until it reaches or exceeds the critical value. At the critical value, the upper pressure plate 31 rotates, which drives the palletizing unit and the lower turntable 21 to rotate synchronously through the clamping force. On the other hand, when the torque reaches T1, the upper pressure plate 31 overcomes the restriction of the limit block 36 and begins to rotate, and drives the palletizing unit and the lower turntable 21 to rotate synchronously through the clamping force, completing 0 to 9.25 turns of film wrapping.

[0084] c. The preset number of wrapping turns is 10 turns. When the turntable 21 rotates between 9.25 and 10 turns, the motor B44 starts and drives the cutter 43 to rotate upward at a certain angle to prepare for cutting the plastic sealant 412.

[0085] d. When the lower turntable 21 rotates 10 times, the following two operations are performed simultaneously: 1. Motor A32 stops running, so that the palletizing unit and the lower turntable 21 stop rotating; 2. Motor B44 starts, driving the cutter 44 to rotate downward to the horizontal, thereby cutting the plastic film 412, thus completing the packaging of the palletizing unit.

[0086] e. When motor A32 is started, it drives the upper pressure plate 31 to move upward along the lead screw 34 and return to the initial state, so that the palletizing unit can be unloaded from the rectangular platform 211 of the lower turntable 21.

[0087] In this step, after the cutter 43 rotates upward to its final position, the height of its end is higher than the upper edge of the plastic sealant 412.

[0088] In this step, the number of rotations of the lower turntable 21 is counted by a counter.

[0089] S03, Affixing Information Cards: Input the quantity of each brand of cigarettes in the currently packaged palletizing unit into the PC, print out the information card of the currently packaged palletizing unit through the printer, and finally affix the information card to the currently packaged palletizing unit.

[0090] In this step, the information card records the cigarette brands included in the current palletizing unit, the quantity of each brand of cigarettes, and the production batch of each carton of cigarettes.

Claims

1. A method for rotating the entire stacking unit of cigarettes subject to vertical pressure, characterized by: The vertical pressing and rotating assembly of the cigarette packing machine involved in the case is used to drive the palletizing unit to perform horizontal rotational motion; The vertical pressing assembly of the cigarette packing machine involved in the case includes a housing, a lower turntable device, and an upper pressing plate device; The outer shell has an inner cavity for containing cigarettes, and the top of the inner cavity has a cylindrical cavity that communicates with the inner cavity. The lower turntable device includes a lower turntable and a bearing; the lower turntable is rotatably mounted on the bottom surface of the inner cavity of the housing via the bearing, and the lower turntable rotates in the horizontal plane via the bearing. A horizontally arranged rectangular platform is provided in the central area of ​​the lower turntable. The upper pressure plate device includes an upper pressure plate and a rotary lifting drive assembly. The upper pressure plate is installed in the upper part of the inner cavity of the housing via the rotary lifting drive assembly, and is located directly above the rectangular platform. The upper pressure plate moves vertically up and down or rotates horizontally under the drive of the rotary lifting drive assembly. The upper pressure plate is a hollow cylinder with an open upper end, including a main plate and a central cylinder fixedly connected to the center of the main plate and arranged axially. The outer wall of the main plate is provided with an axially extending limiting groove. The rotary lifting drive assembly includes a motor A, a nut, a lead screw, a guide seat, a limiting block, a stop block, and a spring. The motor A is fixedly installed on the top of the housing, and its shaft extends vertically downward. The nut is fixedly installed on the upper end of the central cylinder of the upper pressure plate, and the axis of its inner hole coincides with the axis of the inner hole of the central cylinder. The upper end of the lead screw passes through... The upper pressure plate is connected to the shaft of motor A via a coupling. The middle part of the lead screw is screwed into the nut, and the lower end of the lead screw extends into the inner hole of the central cylinder of the upper pressure plate. The guide seat is fixedly installed on the top of the outer shell, and it has a cavity for accommodating the limiting block. One end of the cavity is connected to the cylindrical cavity of the outer shell. The limiting block is slidably installed on the end of the cavity of the guide seat that is relatively close to the cylindrical cavity. The abutment is fixedly connected to the end of the guide seat that is relatively far away from the cylindrical cavity. The spring is compressed in the cavity of the guide seat, and its two ends abut against the limiting block and the abutment respectively. The spring force forces the front end of the limiting block to extend into the cylindrical cavity and press it against the outer wall of the upper pressure plate. As the upper pressure plate rotates, when the limiting groove of the upper pressure plate is aligned with the front end of the limiting block, the limiting block is embedded in the limiting groove of the upper pressure plate under the action of the spring force. The minimum torque required for the upper pressure plate to overcome the rotation restriction of the limit block and slide out of the limit groove on the outer wall of the upper pressure plate is T1; the minimum torque required for the upper pressure plate and the lead screw to rotate relative to each other is T2; the maximum torque output by motor A is T3; then, T3>T1>(1+a)T2; a is the safety factor, which takes a value of 0.1~0.5; Before the method is executed, the vertical pressing assembly of the cigarette packing machine in question is in an initial state; in the initial state: the upper pressing plate is in the height range of 90%-100% of its travel stroke, and the front end of the limiting block is embedded in the limiting groove of the upper pressing plate; The method is as follows: S01, Stacking and palletizing unit: Stacking units on the rectangular platform of the lower turntable, ensuring that the four sides of the lower surface of the stacking unit are parallel to the four sides of the rectangular platform, and that the lower surface of the stacking unit is completely enclosed by the rectangular platform. In this step, the palletizing unit is a cuboid formed by stacking cigarettes of the same size; S02, drive the palletizing unit to rotate: Motor A is started to drive the lead screw to rotate, which in turn drives the nut and the upper pressure plate to move downward along the lead screw. When the upper pressure plate is not in contact with the palletizing unit, the torque output by motor A is T2. At this time, the torque is sufficient to drive the lead screw and the upper pressure plate to rotate relative to each other, but insufficient to make the upper pressure plate overcome the limitation of the limit block to rotate. Therefore, the upper pressure plate only moves vertically. After the upper pressure plate contacts the palletizing unit, the upper pressure plate has no downward height, so the lead screw and the nut cannot rotate relative to each other to form a whole. Since motor A is still outputting power, the torque output by motor A suddenly increases from T2 to T1. When the torque reaches T1, the upper pressure plate overcomes the limitation of the limit block and begins to rotate, and drives the palletizing unit and the lower turntable to rotate synchronously through the clamping force.

2. The method for rotating the entire cigarette stacking unit under vertical pressure as described in claim 1, characterized in that: The guide seat has a threaded hole at the end that is relatively far from the cylindrical cavity; correspondingly, the abutment is a bolt connected in the threaded hole, with one end located outside the guide seat and the other end extending into the guide seat; turning the bolt can adjust the compression degree of the spring, thereby realizing the adjustment of the torque T1.

3. The method for rotating the entire cigarette stacking unit under vertical pressure as described in claim 2, characterized in that: The lower turntable device also includes a counter; the counter includes a signal receiving device and a signal transmitting device; the signal receiving device is fixedly installed on the lower surface of the lower turntable and rotates in a circle as the lower turntable rotates; the signal transmitting device is fixedly installed on the bottom surface of the inner cavity of the housing and is located directly below the rotation path of the signal receiving device; the counter is used to record the number of rotations of the lower turntable and determine the rotation angle of the lower turntable.

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