A cigarette packet conveying and folding device

Abstract

The application provides a cigarette packet conveying and folding device, which comprises a reciprocating mould box assembly, a folding assembly and a push hand assembly. The reciprocating mould box assembly comprises a first driving source and two single-degree-of-freedom six-bar mechanisms. The first driving source drives the two single-degree-of-freedom six-bar mechanisms to move, thereby driving the connecting plate to move linearly. The folding assembly comprises a mould box, two first folding fingers and a second folding finger arranged on the connecting plate. The push hand assembly comprises a second driving source, a third driving source and a double-degree-of-freedom linkage mechanism. The double-degree-of-freedom linkage mechanism is provided with a push hand. The second driving source and the third driving source work cooperatively to drive the double-degree-of-freedom linkage mechanism to move, thereby driving the push hand to translate and first rise and then fall when returning to the initial position. The cigarette packet conveying and folding device has the advantages that: the linkage mechanism can make the cigarette packet stop or move at any position in the linear motion according to the action requirements of the packaging process; the large-inertia rotary rigid body is cancelled, the motion control is more accurate; and the device can be sealed and lubricated, thereby greatly improving the cleanliness of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the tobacco packaging technical field, and particularly relates to a cigarette packet conveying and folding device. BACKGROUND

[0002] Tobacco packaging is an important link in the production process of cigarette products, and the packaging quality directly affects the overall image and market competitiveness of a cigarette enterprise. In the cigarette packaging process, in order to maintain the aroma and moisture of the cigarette, soft paper (such as aluminum foil paper or film paper) is used to wrap and package the cigarette, and the cigarette wrapped with aluminum foil paper or film paper is generally referred to as a cigarette inner package. In the movement process of the cigarette inner package, the related edges and corners of the soft paper need to be folded; after the folding is completed, the cigarette inner package needs to be sent to a subsequent packaging station for packaging of a trademark paper. Meanwhile, in order to ensure the overall packaging quality and efficiency of the cigarette, the cigarette inner package also needs to be accurately positioned and conveyed. Therefore, one of the key technologies in the field of tobacco packaging machinery is how to accurately position and convey the cigarette inner package and how to complete the folding of the paper.

[0003] The existing tobacco packaging machinery usually adopts a packaging wheel or a conveying belt to convey the cigarette inner package, and sets a mold box, a baffle and a guide mechanism to ensure the accurate position of the cigarette inner package. In the folding process of the paper, a folding mechanism driven by a cam or a cylinder or a fixed spiral folder is usually used, and through the action of these mechanisms, the paper can be folded into a predetermined shape. However, since it is impossible to complete all the folding actions on the same packaging wheel or conveying belt, the conveying and transfer of the cigarette inner package are usually involved, mainly including four transfer modes of the cigarette inner package from wheel to wheel, from belt to belt, from wheel to belt and from belt to wheel, wherein the mode of transferring the cigarette inner package from the conveying belt to the packaging wheel is special, and generally needs two actions of transfer.

[0004] When solving the action of transfer of the cigarette inner package, the existing equipment adopts a two-degree-of-freedom variable-pose reciprocating cigarette pushing mechanism, such as the gear cam mechanism disclosed in Chinese Invention Patent CN1263653C or the gear connecting rod mechanism disclosed in Chinese Invention Patent CN103423406B. Both of the two mechanisms need to drive a large-inertia rotating rigid body by using a gear transmission, which not only needs oil lubrication, but also generates a large amount of heat due to friction, affecting the performance of the mechanism. Meanwhile, the stroke and trajectory of the two mechanisms are fixed, and if the specifications of the cigarette inner package change and the stroke and trajectory need to be adjusted, a large number of parts need to be replaced to adjust, consuming a large amount of time and labor.

[0005] The existing device uses a single degree of freedom reciprocating linear motion mechanism, usually a crank slider mechanism, in the process of handling the cigarette packet "joint" action, that is, the process of cigarette packet leaving the conveying belt and being transported to the packaging wheel. The mechanism has the following problems: first, the motion characteristics of the crank slider mechanism determine that the crank must be continuously rotated to drive the slider to move reciprocatingly, which cannot make the reciprocating mold box move and stop according to a specific packaging process action; second, the crank slider mechanism will generate a large vibration and impact under high speed motion, resulting in a deviation of the cigarette packet position, thereby affecting the folding quality of the cigarette packet and the subsequent conveying accuracy; third, the slider must be externally lubricated by lubricating oil and grease during the movement, and the oil and grease can easily contaminate the cigarette packet, resulting in unqualified cigarette packet.

[0006] Meanwhile, the running speed of the existing reciprocating mold box and push hand device can only reach the index of 400 times / min, which cannot meet the higher running speed index. SUMMARY

[0007] In view of the above defects, the purpose of the present application is to provide a cigarette packet conveying and folding device with more flexible control, higher precision and cleanliness.

[0008] The present application provides a cigarette packet conveying and folding device arranged between a conveying belt and a packaging wheel, comprising: a reciprocating mold box assembly comprising a first driving source and two single degree of freedom six-bar mechanisms, the top of the two single degree of freedom six-bar mechanisms being provided with a connecting plate, the first driving source driving the two single degree of freedom six-bar mechanisms to move, thereby driving the connecting plate to move linearly reciprocatingly; a folding assembly comprising a mold box, two first folding fingers and a second folding finger arranged on the connecting plate, the mold box being used to provide a conveying passage for the cigarette inner packet from the conveying belt to the packaging wheel; the two first folding fingers being rotatably arranged on both sides of the mold box and being used to fold the left and right corners of the cigarette inner packet; the second folding finger being rotatably arranged at the bottom of the mold box and being used to fold the lower short side of the cigarette inner packet; a push hand assembly comprising a second driving source, a third driving source and a double degree of freedom linkage mechanism, the double degree of freedom linkage mechanism being provided with a push hand, the second driving source and the third driving source working cooperatively to drive the double degree of freedom linkage mechanism to move, thereby driving the push hand to translate and first rise and then fall when returning to the starting position, the push hand being used to fold the upper short side of the cigarette inner packet and push the cigarette inner packet out of the mold box.

[0009] Preferably, the single degree of freedom six-bar mechanism comprises a frame, a first connecting rod, a second connecting rod and a third connecting rod, the two single degree of freedom six-bar mechanisms are connected through a driving shaft and a passive shaft, the end of the driving shaft is provided with a driving shaft swing arm, the upper end of the driving shaft swing arm is hinged to the lower end of the first connecting rod, the lower end is hinged to the lower end of the second connecting rod, the middle part is provided with a first rotation center hinged to the frame, and the driving shaft is coaxially arranged with the first rotation center; the upper end of the first connecting rod and the upper end of the second connecting rod are hinged through the third connecting rod, and the connecting plate is arranged on the top of the third connecting rod; the passive shaft is parallel to the driving shaft, and the end of the passive shaft is provided with a passive shaft swing arm, the upper end of the passive shaft swing arm is hinged to the middle part of the first connecting rod, and the lower end is provided with a second rotation center hinged to the frame, and the passive shaft is coaxially arranged with the second rotation center.

[0010] Preferably, the center distance between the first rotation center and the second rotation center is L1, the rod length of the driving shaft swing arm is L2, the rod length of the passive shaft swing arm is L3, the rod length of the first connecting rod is L4, the rod length of the second connecting rod is L5, and the rod length of the third connecting rod is L6; L1:L2:L3:L4:L5:L6=4:4:5:10:10:8.

[0011] Preferably, the first folding finger and the second folding finger are each driven to rotate by an independent driving source.

[0012] Preferably, the independent driving source is a servo motor or a cam.

[0013] Preferably, the double degree of freedom connecting rod mechanism comprises a frame, a driving block, a driving rod, a passive block, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod, a seventh connecting rod and an eighth connecting rod, the first end of the driving block is provided with a first opening hole hinged to the frame; the second end of the driving block is provided with a second opening hole hinged to the first end of the fifth connecting rod and the eighth connecting rod; the third end of the driving block is provided with a third opening hole; the upper end of the driving rod is provided with a third rotation center hinged to the frame, the lower end is hinged to the middle part of the sixth connecting rod and the seventh connecting rod, the lower end of the sixth connecting rod is hinged to the second end of the eighth connecting rod; the first end of the passive block is provided with a fourth opening hole concentric with the third rotation center and hinged to the frame; the second end of the passive block is provided with a fifth opening hole hinged to the upper end of the sixth connecting rod; the third end of the passive block is provided with a sixth opening hole hinged to the fourth connecting rod between the third opening hole; and the push handle is fixedly arranged at the first end of the eighth connecting rod.

[0014] Preferably, the center distance between the first and fourth openings is L7, the center distance between the first and third openings is L8, the center distance between the first and second openings is L9, the center distance between the fourth and sixth openings is L10, the center distance between the fourth and fifth openings is L11, the length of the fourth connecting rod is L12, and the length of the eighth connecting rod is L13, L7=L12=L13, L8=L10, L9=L11.

[0015] Preferably, the first driving source is a servo motor or a cam connecting rod mechanism.

[0016] Preferably, the second driving source and the third driving source are both servo motors.

[0017] The present application has the advantages of:

[0018] Firstly, the reciprocating mold box assembly adopts two single-degree-of-freedom six-bar mechanisms to replace the original crank slider mechanism, solving the problems of the crank slider mechanism, such as large inertia variation, severe impact, continuous rotation of the crank, inability to control the stop position of the mechanism arbitrarily, and low flexibility. The single-degree-of-freedom six-bar mechanism of the present application is powered by one driving source, and its motion control is more flexible. The motion of the mechanism can be controlled according to the packaging process requirements, so that the cigarette packet can be stopped or moved at any position during linear motion, the inertia variation is small, and the vibration and impact are smaller.

[0019] Secondly, the pusher assembly adopts a double-degree-of-freedom connecting rod mechanism, which cancels the large inertia rotating rigid body and solves the problem of large inertia variation range of the previous mechanism. The double-degree-of-freedom connecting rod mechanism is powered by two driving sources, and through the cooperation of the motion of the two servo motors, the motion law of the straight line trajectory in the forward stroke and the upward and then downward motion in the return stroke is realized. The motion control is more accurate, and the vibration and noise are lower.

[0020] In addition, the running speed of the device is higher, which can reach the speed requirement of 600 times per minute.

[0021] Finally, all the motion units of the present application adopt connecting rod mechanisms without any gear transmission, and the sliding pair is cancelled. The motion pairs are all rotating pairs, and no external bare lubrication components are needed. All can be sealed and lubricated, greatly improving the cleanliness of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Fig. 1 is a perspective view of a cigarette packet conveying and folding device of the present application;

[0023] Figure 2 Fig. 2 is an assembly diagram of a reciprocating mold box assembly and a folding assembly;

[0024] Figure 3Figure 1 is a front view of the reciprocating die assembly;

[0025] Figure 4 Figure 2 is a front view of the pusher assembly;

[0026] Figure 5 Figure 3 is a perspective view of the cigarette inner package X;

[0027] Figure 6 Figure 4 is a perspective view of the primary folding inner package Y;

[0028] Figure 7 Figure 5 is a perspective view of the secondary folding inner package Z;

[0029] Figure 8 Figure 6 is a perspective view of the tertiary folding inner package W.

[0030] Element Number Explanation:

[0031] 1 conveyor belt

[0032] 2 wrapping wheel

[0033] 3 reciprocating die assembly

[0034] 31 first driving source

[0035] 32 driving shaft

[0036] 321 driving shaft swing arm

[0037] 33 passive shaft

[0038] 331 passive shaft swing arm

[0039] 34 first connecting rod

[0040] 35 second connecting rod

[0041] 36 third connecting rod

[0042] 37 connecting plate

[0043] 38 frame

[0044] 4 folding assembly

[0045] 41 die

[0046] 42 accommodating cavity

[0047] 43 first folding finger

[0048] 431 first rotating shaft

[0049] 44 second folding finger

[0050] 5 pusher assembly

[0051] 50 base

[0052] 51 driving block

[0053] 511 second driving source

[0054] 51a first opening

[0055] 51b second opening

[0056] 51c third opening

[0057] 52 driving rod

[0058] 521 third driving source

[0059] 52a fourth opening

[0060] 52b fifth opening

[0061] 52c sixth opening

[0062] 53 passive block

[0063] 54 fourth connecting rod

[0064] 55 fifth connecting rod

[0065] 56 sixth connecting rod

[0066] 57 seventh connecting rod

[0067] 58 eighth connecting rod

[0068] 59 push handle

[0069] 6 cigarette group

[0070] 7 cigarette inner package

[0071] 71 left corner

[0072] 72 right corner

[0073] 73 lower short side

[0074] 74 upper short side

[0075] X unfolded inner package

[0076] Y primary folded inner package

[0077] Z secondary folded inner package

[0078] W tertiary folded inner package DETAILED DESCRIPTION

[0079] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present application, and are not intended to limit the present application.

[0080] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" to "eighth" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0081] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0083] Figure 3 The front view of the reciprocating mold box assembly is shown, and in the following description, the drawings in Figure 3 are taken as the reference basis for the direction, and in Figure 3 , the left direction is outward perpendicular to the view paper, the right direction is inward perpendicular to the view paper, the upward direction is along the view paper, the downward direction is along the view paper, the rear direction is along the view paper, and the front direction is along the view paper.

[0084] As Figure 1 and Figure 5As shown, the present invention provides a cigarette pack conveying and folding device, which is disposed between a conveyor belt 1 and a wrapping wheel 2. It is used to separate cigarette inner packs 7, each containing a group of cigarettes 6, from the conveyor belt 1 and transport them to the wrapping wheel 2, while simultaneously folding the relevant edges and corners of the cigarette inner packs 7. The device comprises a reciprocating mold box assembly 3, a folding assembly 4, and a pusher assembly 5. During operation, the reciprocating mold box assembly 3 performs a forward and backward linear motion between the conveyor belt 1 and the wrapping wheel 2. It receives unfolded inner packs X conveyed from the rear conveyor belt 1 and separates them from the conveyor belt 1 by moving forward linearly. As the reciprocating mold box assembly 3 moves toward the wrapping wheel 2, the folding assembly 4 further folds the unfolded inner packs X to form secondary folded packs Z. The pusher assembly 5 then further folds the secondary folded packs Z to form final folded packs W. The pusher assembly 5 then linearly pushes the final folded pack W forward from the reciprocating mold box assembly 3, which then ascends and descends to return to its starting position.

[0085] like Figures 1-3 As shown, the reciprocating mold box assembly 3 includes a first drive source 31 and two single-degree-of-freedom six-bar mechanisms. A connecting plate 37 is provided at the top of the two single-degree-of-freedom six-bar mechanisms. The first drive source 31 drives the two single-degree-of-freedom six-bar mechanisms to move synchronously, driving the connecting plate 37 to perform linear reciprocating motion in the front-to-back direction. Specifically, each single-degree-of-freedom six-bar mechanism includes a frame 38, a first connecting rod 34, a second connecting rod 35, and a third connecting rod 36. The two single-degree-of-freedom six-bar mechanisms are connected by a driving shaft 32 and a driven shaft 33. The two frames 38 of the two single-degree-of-freedom six-bar mechanisms are fixed and arranged symmetrically, and the remaining components are arranged between the two frames 38. The drive shaft 32 extends left and right, with a drive shaft swing arm 321 at each end. The upper end of each drive shaft swing arm 321 is hinged to the lower end of a first connecting rod 34, and the lower end is hinged to the lower end of a second connecting rod 35. A first rotation center is located in the middle, which is hinged to the frame 38 on the same side. The drive shaft 32 is coaxial with the first rotation center and rotates about its own axis under the drive of the first drive source 31. The upper end of the first connecting rod 34 and the upper end of the second connecting rod 35 are hingedly connected by a third connecting rod 36 extending in the front-to-back direction. A connecting plate 37 is provided at the top of the two third connecting rods 36. The passive shaft 33 is parallel to the driving shaft 32, and is provided with a passive shaft swing arm 331 at each of its left and right ends. The lower end of each passive shaft swing arm 331 is provided with a second rotation center, and the second rotation center is hinged to the frame 38 on the same side. The passive shaft 33 is coaxially arranged with the second rotation center, and rotates around its own axis under the action of external force; the upper end of each passive shaft swing arm 331 is hinged to the middle part of a first connecting rod 34.

[0086] Further, the center distance between the first rotation center and the second rotation center is L1, the length of the driving shaft swing arm 321 is L2, the length of the passive shaft swing arm 331 is L3, the length of the first connecting rod 34 is L4, the length of the second connecting rod 35 is L5, the length of the third connecting rod 36 is L6, and L1:L2:L3:L4:L5:L6=4:4:5:10:10:8. The first driving source 31 is a servo motor or a cam connecting rod mechanism, which can provide rotary power for the driving shaft 32. When the driving shaft 32 rotates, the connecting plate 37 can move linearly in the front-back direction.

[0087] As shown in Figure 2 , the folding assembly 4 includes a mold box 41, two first folding fingers 43 and a second folding finger 44 arranged on the connecting plate 37, which can move linearly and synchronously with the reciprocating mold box assembly 3. The mold box 41 is used to provide a conveying passage for the cigarette inner package 7 to enter the packaging wheel 2, which includes a left half and a right half, and the left half and the right half are symmetrically fixed on the connecting plate 37 to form an accommodation cavity 42 which is closed on four sides and open on two sides. The shape and size of the accommodation cavity 42 are matched with the shape and size of the cigarette inner package 7, which can clamp the cigarette inner package 7 and allow the cigarette inner package 7 to pass through the mold box 41 when the cigarette inner package 7 moves in the front-back direction under the pushing action of the pusher assembly 5. The two first folding fingers 43 are each rotatably arranged on the left and right sides of the mold box 41 through a first rotating shaft 431, and the two first rotating shafts 431 are parallel to the up-down direction. The second folding finger 44 is rotatably arranged at the bottom of the mold box 41 through a second rotating shaft, and the second rotating shaft is parallel to the left-right direction.

[0088] As shown in Figure 2 , Figures 5-7 The rear end of the unfolded inner package X conveyed by the conveying belt 1 has a left corner 71, a right corner 72, a lower short side 73 and an upper short side 74 in an unfolded state. During the forward movement of the reciprocating mold box assembly 3, the two first folding fingers 43 swing left or right around the first rotating shaft 431 respectively, the first folding finger 43 on the left side folds the left corner 71 of the unfolded inner package X, and the first folding finger 43 on the right side folds the right corner 72 of the unfolded inner package X, forming a primary folded inner package Y whose left and right corners are in close contact with the rear end face of the cigarette group 6, and the lower short side 73 and the upper short side 74 are unfolded. Then the second folding finger 44 swings upward around the second rotating shaft, which folds the lower short side 73 of the primary folded inner package Y, forming a secondary folded inner package Z whose left and right corners and lower short side 73 are in close contact with the rear end face of the cigarette group 6, and the upper short side 74 is unfolded.

[0089] Further, the first folding finger 43 and the second folding finger 44 are each driven to rotate by an independent driving source, which is independent of the first driving source 31, the second driving source 511 and the third driving source 521, and can be a servo motor or a fixed cam.

[0090] As shown in Figure 1 , Figure 4 , Figures 7-8 The pusher assembly 5 includes the second driving source 511, the third driving source 521 and a double-degree-of-freedom linkage mechanism, and the pusher 59 is arranged in the double-degree-of-freedom linkage mechanism. The second driving source 511 and the third driving source 521 work cooperatively to drive the double-degree-of-freedom linkage mechanism to move, thereby driving the pusher 59 to translate from the starting position on the side (i.e., the rear side) where the conveying belt 1 is located to the side (i.e., the front side) where the packaging wheel 2 is located, and then to return to the starting position from the side where the packaging wheel 2 is located while first ascending and then descending. The pusher 59 is used to fold the upper short edge 74 of the secondary folding inner package Z to form a final folding inner package W, and to push the final folding inner package W out of the mold box 41.

[0091] Specifically, the double-degree-of-freedom linkage mechanism includes a base 50, a driving block 51, a driving rod 52, a passive block 53, a fourth linkage 54, a fifth linkage 55, a sixth linkage 56, a seventh linkage 57 and an eighth linkage 58. The base 50 is fixedly arranged. The driving block 51 is triangular and includes a first end provided with a first opening 51a, a second end provided with a second opening 51b and a third end provided with a third opening 51c. The first opening 51a is the rotation center of the driving block 51, which is hingedly connected to the base 50. The driving block 51 reciprocates around the first opening 51a under the drive of the second driving source 511. The second opening 51b is hingedly connected to the first end (i.e., the front end) of the eighth linkage 58 through the fifth linkage 55. The upper end of the driving rod 52 is provided with a third rotation center, which is hingedly connected to the base 50. The driving rod 52 reciprocates around the third rotation center under the drive of the third driving source 521. The lower end of the driving rod 52 is hingedly connected to the middle part of the sixth linkage 56 through the seventh linkage 57. The lower end of the sixth linkage 56 is hingedly connected to the second end (i.e., the right end) of the eighth linkage 58. The passive block 53 is triangular and includes a first end provided with a fourth opening 53a, a second end provided with a fifth opening 53b and a third end provided with a sixth opening 53c. The fourth opening 53a is the rotation center of the passive block 53, which is concentrically arranged with the third rotation center and is hingedly connected to the base 50. The fifth opening 53b is hingedly connected to the upper end of the sixth linkage 56. The sixth opening 53c is hingedly connected to the third opening 51c through the fourth linkage 54. The pusher 59 is fixedly arranged at the front end of the eighth linkage 58.

[0092] The center distance between the third opening 51c and the sixth opening 53c is L7, the center distance between the first opening 51a and the third opening 51c is L8, the center distance between the first opening 51a and the second opening 51b is L9, the center distance between the fourth opening 53a and the sixth opening 53c is L10, the center distance between the fourth opening 53a and the fifth opening 53b is L11, the length of the fourth connecting rod 54 is L12, the length of the eighth connecting rod 58 is L13, the center distance between the second opening 51b and the fifth opening 53b is L14, the length of the fifth connecting rod 55 is L15, and the length of the sixth connecting rod 56 is L16, L7=L12=L13=L14, L8=L10, L9=L11, L15=L16.

[0093] The second driving source 511 and the third driving source 521 are both servo motors, and the two servo motors work cooperatively to execute different motion rules, so that the double-freedom connecting rod mechanism drives the pusher 59 to move along the horizontal straight path R1 when moving from the starting position (i.e. the rear end point of the horizontal straight path R1) close to the conveying belt 1 to the side where the packaging wheel 2 is located, and the pusher 59 translates along the horizontal straight path R1, so that the final-stage folded cigarette packet W is pushed out of the mold box 41 and then pushed into the packaging wheel 2. Then the double-freedom connecting rod mechanism drives the pusher 59 to move from the side where the packaging wheel 2 is located to the starting position, and in this process, the pusher 59 first rises along the inclined straight path R2 to gradually rise, avoids the folding assembly 4 which moves linearly below the reciprocating mold box assembly 3, then descends along the vertical straight path R3, and returns to the starting position while folding the upper short side 74 of the secondary folded inner packet Z to form the final-stage folded inner packet W, so as to prepare for pushing the final-stage folded inner packet W. Thus, the pusher 59 forms a motion track of pushing straight translation and returning to rise first and then to descend.

[0094] As shown in Figure 1 and Figure 4 , the working principle of the cigarette packet conveying and folding device is as follows:

[0095] When the unfolded inner packet X on the conveying belt 1 is pushed into the folding assembly 4, the reciprocating mold box assembly 3 will accelerate to move away from the conveying belt 1 with a certain distance from the conveying belt 1; in the process of moving forward, the unfolded inner packet X is folded by the folding assembly 4 to form the secondary folded inner packet Z; at this time, the pusher 59 in the pusher assembly 5 is just moved to the upper side of the secondary folded inner packet Z (i.e. the rear end point of the inclined straight path R2), and then the pusher 59 moves downward to fold the upper short side 74 to the position, so as to form the final-stage folded inner packet W with the left and right corners and the upper and lower short sides all adhering to the rear end surface of the cigarette group 6. Then the pusher 59 translates to push the final-stage folded inner packet W into the corresponding mold box of the packaging wheel B2, and then returns to the upper side of the next secondary folded inner packet Z in the rising posture.

[0096] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, several improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A cigarette packet conveying and folding device, which is provided between a conveying belt and a packing wheel, characterized in that, The application relates to a cigarette packaging machine. The reciprocating mould box assembly comprises a first driving source and two single-degree-of-freedom six-link mechanisms, the top of the two single-degree-of-freedom six-link mechanisms is provided with a connecting plate, the first driving source drives the two single-degree-of-freedom six-link mechanisms to move, and drives the connecting plate to make linear reciprocating motion; The folding assembly comprises a mould box arranged on the connecting plate, two first folding fingers and a second folding finger, the mould box is used for providing a conveying channel for cigarette inner packs to enter a packaging wheel from a conveying belt; the two first folding fingers are rotatably arranged on the two sides of the mould box and are used for folding left and right corners of the cigarette inner packs; and the second folding finger is rotatably arranged on the bottom of the mould box and is used for folding a lower short side of the cigarette inner packs; The pusher assembly comprises a second driving source, a third driving source and a double-degree-of-freedom linkage mechanism, the double-degree-of-freedom linkage mechanism is provided with a pusher, the second driving source and the third driving source cooperatively drive the double-degree-of-freedom linkage mechanism to move, drive the pusher to translate, and make the pusher first rise and then fall when returning to an initial position, and the pusher is used for folding an upper short side of the cigarette inner packs and pushing the cigarette inner packs out of the mould box.

2. A packet conveying and folding apparatus according to claim 1, characterised in that The single-degree-of-freedom six-link mechanism comprises a rack, a first connecting rod, a second connecting rod and a third connecting rod, the two single-degree-of-freedom six-link mechanisms are connected through a driving shaft and a passive shaft, the end of the driving shaft is provided with a driving shaft swing arm, the upper end of the driving shaft swing arm is hinged to the lower end of the first connecting rod, the lower end is hinged to the lower end of the second connecting rod, the middle part is provided with a first rotation center hinged to the rack, and the driving shaft and the first rotation center are coaxially arranged; the upper end of the first connecting rod and the upper end of the second connecting rod are hinged through the third connecting rod, and the connecting plate is arranged on the top of the third connecting rod; the passive shaft is parallel to the driving shaft, the end of the passive shaft is provided with a passive shaft swing arm, the upper end of the passive shaft swing arm is hinged to the middle part of the first connecting rod, the lower end is provided with a second rotation center hinged to the rack, and the passive shaft and the second rotation center are coaxially arranged.

3. A packet conveying and folding apparatus according to claim 2, wherein The center distance between the first rotation center and the second rotation center is L1, the rod length of the driving shaft swing arm is L2, the rod length of the passive shaft swing arm is L3, the rod length of the first connecting rod is L4, the rod length of the second connecting rod is L5, and the rod length of the third connecting rod is L6; L1： L2:L3:L4:L5:L6=4:4:5:10:10:

8.

4. The pack conveying and folding apparatus of claim 1 wherein, The first folding finger and the second folding finger are each driven to rotate by an independent driving source.

5. A packet conveying and folding apparatus according to claim 4, wherein The independent driving source is a servo motor or a cam.

6. The pack conveying and folding apparatus of claim 1 wherein, The double-degree-of-freedom linkage mechanism comprises a rack, a driving block, a driving rod, a passive block, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod, a seventh connecting rod and an eighth connecting rod, the first end of the driving block is provided with a first opening hole hinged to the rack; the second end of the driving block is provided with a second opening hole hinged to the first end of the fifth connecting rod and the eighth connecting rod; and the third end of the driving block is provided with a third opening hole. The upper end of the driving rod is provided with a third rotation center hinged with the base, and the lower end is hinged with the middle part of the sixth connecting rod through the seventh connecting rod, and the lower end of the sixth connecting rod is hinged with the second end of the eighth connecting rod; The first end of the passive block is provided with a fourth opening hole concentric with the third rotation center and hinged with the base; the second end of the passive block is provided with a fifth opening hole hinged with the upper end of the sixth connecting rod; and the third end of the passive block is provided with a sixth opening hole hinged with the third opening hole through the fourth connecting rod; The push handle is fixedly arranged at the first end of the eighth connecting rod.

7. A packet conveying and folding apparatus according to claim 6, characterised in that The center distance between the first opening hole and the fourth opening hole is L7, the center distance between the first opening hole and the third opening hole is L8, the center distance between the first opening hole and the second opening hole is L9, the center distance between the fourth opening hole and the sixth opening hole is L10, the center distance between the fourth opening hole and the fifth opening hole is L11, the rod length of the fourth connecting rod is L12, and the rod length of the eighth connecting rod is L13, L7=L12=L13, L8=L10, L9=L11.

8. The pack conveying and folding apparatus of claim 1 wherein, The first driving source is a servo motor or a cam connecting rod mechanism.

9. The pack conveying and folding apparatus of claim 1 wherein, The second driving source and the third driving source are both servo motors.

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