Tobacco bale conveying and folding device

Abstract

The invention provides a cigarette packet conveying and folding device which comprises a reciprocating die box assembly and a folding assembly, the reciprocating die box assembly comprises a first driving source and two single-degree-of-freedom six-bar mechanisms, and the first driving source drives the two single-degree-of-freedom six-bar mechanisms to move and drives a connecting plate to do linear reciprocating motion; the folding assembly comprises a mold box arranged on the connecting plate, two first folding fingers and a second folding finger; the pushing hand assembly comprises a second driving source, a third driving source and a two-degree-of-freedom connecting rod mechanism, a pushing hand is arranged in the two-degree-of-freedom connecting rod mechanism, and the second driving source and the third driving source work cooperatively to drive the two-degree-of-freedom connecting rod mechanism to move and drive the pushing hand to move horizontally, and the pushing hand ascends firstly and then descends when returning to the initial position. The mechanism has the beneficial effects that the connecting rod mechanism is adopted, and the cigarette packets can stop or move at any position in the linear motion process according to the action requirements of the packaging technology; a large-inertia rotation rigid body is cancelled, so that the motion control is more accurate; sealing lubrication can be achieved, and the cleanliness of equipment is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco packaging, and in particular to a cigarette package conveying and folding device. Background Art

[0002] Tobacco packaging is an important link in the production process of cigarette products, and its packaging quality directly affects the overall image and market competitiveness of cigarette companies. In the cigarette packaging process, in order to maintain the aroma and moisture of cigarettes, it is necessary to wrap and package the cigarettes with soft paper (such as aluminum foil or film paper). For this kind of cigarette package wrapped with aluminum foil or film paper, we generally call it a cigarette inner package. During the movement of the cigarette inner package, the relevant edges and corners of the soft paper need to be folded; after folding, the cigarette inner package needs to be sent to the subsequent packaging station for packaging with trademark paper. At the same time, in order to ensure the overall packaging quality and efficiency of cigarettes, it is also necessary to accurately position and transport the cigarette inner package. Therefore, one of the key technologies in the field of tobacco packaging machinery is how to achieve accurate positioning and transportation of cigarette packages, and how to complete the folding of paper.

[0003] Existing tobacco packaging machinery usually uses packaging wheels or conveyor belts to transport cigarette packages, and sets mold boxes, baffles and guide mechanisms to ensure the accurate position of cigarette packages. In terms of paper folding, folding mechanisms driven by cams or cylinders or fixed spiral folders are usually used. Through the action of these mechanisms, the paper can be folded into a predetermined shape. However, since it is impossible to complete all folding actions on the same packaging wheel or conveyor belt, it usually involves the transportation and handover of cigarette packages, mainly including four handover methods: from wheel to wheel, belt to belt, wheel to belt and belt to wheel. Among them, the method of cigarette packages from conveyor belt to packaging wheel is relatively special, and generally requires two actions: handover and connection.

[0004] When solving the action of "crossing" cigarette packs, the existing equipment adopts a dual-degree-of-freedom variable posture 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 mechanisms need to use gear transmission to drive a large inertia rotating rigid body, which not only requires oil lubrication, but also generates a lot of heat due to friction, affecting the performance of the mechanism; at the same time, the stroke and trajectory of these two mechanisms are fixed. If the specifications of the cigarette packs change and the stroke and trajectory need to be adjusted, they can only be adjusted by replacing a large number of parts, which consumes a lot of time and manpower.

[0005] The existing equipment uses a single-degree-of-freedom reciprocating linear motion mechanism when processing the action of "connecting" cigarette packs (i.e., the process of cigarette packs leaving the conveyor belt and being transported to the packaging wheel). This mechanism usually has the following problems: First, the motion characteristics of the crank slider mechanism determine that the crank must rotate continuously to drive the slider to move back and forth, and it is impossible to make the reciprocating mold box move and stop according to the specific packaging process action; second, the crank slider mechanism will produce large vibrations and impacts under high-speed motion conditions, causing the position of the cigarette pack to shift, thereby affecting the folding quality of the cigarette pack and the subsequent conveying accuracy; third, because the slider must be externally lubricated with lubricating oil and grease during the movement, the grease is easy to contaminate the cigarette pack, resulting in unqualified cigarette packs.

[0006] Meanwhile, the operating speed of the existing reciprocating mold box and the pusher device can only reach an index of 400 times / min, which cannot meet a higher operating speed index. Summary of the invention

[0007] In view of the above-mentioned defects, the object of the present invention is to provide a cigarette pack conveying and folding device with more flexible control, higher precision and cleanliness.

[0008] The present invention provides a cigarette pack conveying and folding device, which is arranged between a conveyor belt and a packaging wheel, and comprises: a reciprocating mold box assembly, comprising a first driving source and two single-degree-of-freedom six-bar mechanisms, the tops of the two single-degree-of-freedom six-bar mechanisms are provided with connecting plates, the first driving source drives the two single-degree-of-freedom six-bar mechanisms to move, and drives the connecting plates to perform linear reciprocating motion; a folding assembly, comprising a mold box, two first folding fingers and a second folding finger arranged on the connecting plate, the mold box is used to provide a conveying channel for the cigarette inner pack to enter the packaging wheel from the conveyor belt; the two first folding fingers are rotatably arranged on the connecting plate The two sides of the mold box are used to fold the left and right corners of the cigarette inner package; the second folding finger is rotatably arranged at the bottom of the mold box, and is used to fold the lower short side of the cigarette inner package; the push handle assembly includes a second driving source, a third driving source and a double-degree-of-freedom connecting rod mechanism, and a push handle is provided in the double-degree-of-freedom connecting rod mechanism. The second driving source and the third driving source work together to drive the double-degree-of-freedom connecting rod mechanism to move, drive the push handle to translate, and first rise and then fall when returning to the starting position. The push handle is used to fold the upper short side of the cigarette inner package and push the cigarette inner package out of the mold box.

[0009] Preferably, the single-degree-of-freedom six-bar mechanism includes a frame, a first connecting rod, a second connecting rod and a third connecting rod, and the two single-degree-of-freedom six-bar mechanisms are connected by a driving shaft and a passive shaft, and a driving shaft swing arm is provided at the end of the driving shaft, the upper end of the driving shaft swing arm is hinged to the lower end of the first connecting rod, and the lower end is hinged to the lower end of the second connecting rod, and a first rotation center hinged to the frame is provided in the middle, 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 a passive shaft swing arm is provided at its end, the upper end of the passive shaft swing arm is hinged to the middle of the first connecting rod, and a second rotation center hinged to the frame is provided at the lower end, 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 linkage mechanism comprises a base, 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, wherein the first end of the driving block is provided with a first opening hinged to the base; the second end of the driving block is provided with a second opening, and the second opening is hinged to the first end of the eighth connecting rod through the fifth connecting rod; the third end of the driving block is provided with a third opening; the upper end of the driving rod is provided with a third rotation center hinged to the base, and the lower end thereof is hinged to the middle part of the sixth connecting rod through the seventh connecting rod, and 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 concentric with the third rotation center and hinged to the base; the second end of the passive block is provided with a fifth opening, and the fifth opening is hinged to the upper end of the sixth connecting rod; the third end of the passive block is provided with a sixth opening, and the sixth opening is hinged to the third opening through the fourth connecting rod; the push handle is fixedly arranged at the first end of the eighth connecting rod.

[0014] Preferably, the center distance between the first opening and the fourth opening is L7, the center distance between the first opening and the third opening is L8, the center distance between the first opening and the second opening is L9, the center distance between the fourth opening and the sixth opening is L10, the center distance between the fourth opening and the fifth opening is L11, the length of the fourth connecting rod is L12, 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-link mechanism.

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

[0017] The present invention is beneficial in that:

[0018] First, 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 excessive change in mechanism inertia and severe impact during the movement of the crank slider mechanism, and the crank can only rotate continuously and cannot arbitrarily control the stop position of the mechanism, and the low flexibility. The single-degree-of-freedom six-bar mechanism of the present invention is powered by a driving source, and its motion control is more flexible. According to the requirements of the packaging process, the cigarette package can be stopped or moved at any position during the linear motion process, with small inertia change, smaller vibration and impact.

[0019] Secondly, the push handle assembly adopts a dual-degree-of-freedom linkage mechanism, which eliminates the large inertia rotating rigid body and solves the problem of excessive inertia variation range of the previous mechanism. The dual-degree-of-freedom linkage mechanism is powered by two drive sources. Through the movement coordination of two servo motors, the outward straight line trajectory and the return movement law of first rising and then falling are realized. Its movement control is more precise, and the vibration and noise are lower.

[0020] In addition, the device has a higher operating speed and can reach the speed index requirement of 600 times / minute.

[0021] Finally, all the moving units of the present invention adopt a connecting rod mechanism without any gear transmission. At the same time, the sliding pair is eliminated, and the moving pairs are all rotating pairs. No external exposed lubrication parts are required, and all can be sealed and lubricated, which greatly improves the cleanliness of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of a cigarette packet conveying and folding device according to the present invention;

[0023] Figure 2 It is a schematic diagram of the assembly of the reciprocating mold box component and the folding component;

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

[0025] Figure 4 It is a front view of the push handle assembly;

[0026] Figure 5 A three-dimensional image of a cigarette inner package X;

[0027] Figure 6 It is a three-dimensional diagram of the primary folded inner package Y;

[0028] Figure 7 is a three-dimensional diagram of the secondary folded inner package Z;

[0029] Figure 8 It is a three-dimensional diagram of the final folded inner package W.

[0030] Component number description:

[0031] 1 Conveyor belt

[0032] 2 Packing wheels

[0033] 3 Reciprocating mold box assembly

[0034] 31 First driving source

[0035] 32 Drive shaft

[0036] 321 Drive 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 racks

[0044] 4 Folding components

[0045] 41 mold box

[0046] 42 Accommodation chamber

[0047] 43 First Folding Finger

[0048] 431 First Rotation Axis

[0049] 44 Second folding finger

[0050] 5 Push handle assembly

[0051] 50 base

[0052] 51 Driver block

[0053] 511 Second driving source

[0054] 51a First opening

[0055] 51b Second opening

[0056] 51c Third opening

[0057] 52 Drive rod

[0058] 521 Third drive source

[0059] 52a Fourth opening

[0060] 52b Fifth opening

[0061] 52c Sixth opening

[0062] 53 Passive Blocks

[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 Pusher

[0069] 6 cigarettes group

[0070] 7 Cigarette inner pack

[0071] 71 left corner

[0072] 72 right corner

[0073] 73 Lower short side

[0074] 74 Upper short side

[0075] X Unfolded inner bag

[0076] Y Primary folding inner bag

[0077] Z secondary folding inner bag

[0078] W Ultimate foldable inner bag DETAILED DESCRIPTION

[0079] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

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

[0081] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0083] Figure 3 The front view of the reciprocating die box assembly is shown. In the following description, Figure 3 The attached figure in the figure is used as a reference for the direction. Figure 3 In the figure, the left direction is perpendicular to the view paper and facing outward, the right direction is perpendicular to the view paper and facing inward, the upward direction is along the view paper and facing upward, the downward direction is along the view paper and facing downward, the rear direction is along the view paper and facing left is along the view paper and facing forward.

[0084] like Figure 1 and Figure 5As shown, the present invention provides a cigarette pack conveying and folding device, which is arranged between a conveyor belt 1 and a packaging wheel 2, and is used to separate a cigarette inner pack 7 with a cigarette group 6 inside from the conveyor belt 1, transport it to the packaging wheel 2, and complete the folding of the relevant corners of the cigarette inner pack 7. The device comprises a reciprocating mold box assembly 3, a folding assembly 4 and a pusher assembly 5. When the device is working, the reciprocating mold box assembly 3 performs a reciprocating linear motion in the front-to-back direction between the conveyor belt 1 and the packaging wheel 2, and can receive the unfolded inner pack X transported from the rear conveyor belt 1, and separate it from the conveyor belt 1 by moving forward linearly; in the process of the reciprocating mold box assembly 3 moving toward the packaging wheel 2, the folding assembly 4 further folds the unfolded inner pack X to form a secondary folded cigarette pack Z; then the pusher assembly 5 further folds the secondary folded cigarette pack Z to form a final folded cigarette pack W, and then the pusher assembly 5 pushes the final folded cigarette pack W forward out of the reciprocating mold box assembly 3 in a linear motion, and returns to the starting position by rising and then falling.

[0085] like Figure 1-3 As shown, the reciprocating mold box assembly 3 includes a first driving source 31 and two single-degree-of-freedom six-bar mechanisms, and a connecting plate 37 is provided on the top of the two single-degree-of-freedom six-bar mechanisms. The first driving 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, and the two single-degree-of-freedom six-bar mechanisms are connected by a driving shaft 32 and a passive shaft 33. Among them, the two frames 38 in the two single-degree-of-freedom six-bar mechanisms are fixedly arranged symmetrically on the left and right, and the remaining components are arranged between the two frames 38. The drive shaft 32 extends in the left-right direction, and a drive shaft swing arm 321 is provided at each of its left and right ends. 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 provided in the middle, and the first rotation center is hinged to the frame 38 on the same side. The drive shaft 32 is coaxially arranged with the first rotation center, and it rotates around its own axis under the drive of the first driving source 31. The upper end of the first connecting rod 34 and the upper end of the second connecting rod 35 are hinged through a third connecting rod 36 extending in the front-back direction, and a connecting plate 37 is arranged on the top of the two third connecting rods 36. The passive shaft 33 is parallel to the driving shaft 32, and has 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 rod length of the driving shaft swing arm 321 is L2, the rod length of the passive shaft swing arm 331 is L3, the rod length of the first connecting rod 34 is L4, the rod length of the second connecting rod 35 is L5, and the rod length of the third connecting rod 36 is L6, 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 rotational power for the driving shaft 32. When the driving shaft 32 rotates, the connecting plate 37 can perform linear reciprocating motion in the front-rear direction.

[0087] like Figure 2 As shown, 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 perform linear reciprocating motion synchronously with the reciprocating mold box assembly 3. The mold box 41 is used to provide a conveying channel for the cigarette inner package 7 to enter the packaging wheel 2 from the conveyor belt 1, and includes a left half and a right half, which are fixed on the connecting plate 37 symmetrically to form a receiving cavity 42 with four closed sides, namely, upper, lower, left, right, and open sides, namely, front and back. The shape and size of the receiving cavity 42 match the shape and size of the cigarette inner package 7, and it can clamp the cigarette inner package 7 and allow the cigarette inner package 7 to pass through the mold box 41 when it moves in the front and back direction under the pushing action of the pusher assembly 5. The two first folding fingers 43 are rotatably arranged on the left and right sides of the mold box 41 through a first rotating shaft 431, and the axial directions of the two first rotating shafts 431 are parallel to the up and 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 axial direction of the second rotating shaft is parallel to the left and right direction.

[0088] like Figure 2 , Figure 5-7 As shown, the rear end of the unfolded inner package X transported by the conveyor 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 leftward or rightward around the first rotating shaft 431 respectively, the first folding finger 43 on the left folds the left corner 71 of the unfolded inner package X, and the first folding finger 43 on the right folds the right corner 72 of the unfolded inner package X, forming a primary folded inner package Y with both left and right corners in contact with the rear end face of the cigarette group 6, and the lower short side 73 and the upper short side 74 unfolded. Then the second folding finger 44 swings upward around the second rotating shaft, folding the lower short side 73 of the primary folded inner package Y, forming a secondary folded inner package Z with both left and right corners and the lower short side 73 in contact with the rear end face of the cigarette group 6, and the upper short side 74 unfolded.

[0089] Furthermore, 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] like Figure 1 , Figure 4 , Figure 7-8 As shown, the pusher assembly 5 includes a second driving source 511, a third driving source 521 and a dual-freedom linkage mechanism, in which a pusher 59 is provided. The second driving source 511 and the third driving source 521 work together to drive the dual-freedom linkage mechanism to move, driving the pusher 59 to translate from the starting position on the side where the conveyor belt 1 is located (i.e., the rear side) to the side where the packaging wheel 2 is located (i.e., the front side), and first rises and then falls when returning to the starting position from the side where the packaging wheel 2 is located. The pusher 59 is used to fold the upper short side 74 of the secondary folding inner package Z to form a final folding inner package W, and push the final folding inner package W out of the mold box 41.

[0091] Specifically, the dual-degree-of-freedom linkage mechanism includes a base 50, a driving block 51, a driving rod 52, a passive block 53, a fourth connecting rod 54, a fifth connecting rod 55, a sixth connecting rod 56, a seventh connecting rod 57 and an eighth connecting rod 58. The base 50 is fixed; the driving block 51 is triangular, and includes a first end with a first opening 51a, a second end with a second opening 51b and a third end with a third opening 51c. The first opening 51a is the rotation center of the driving block 51, which is hinged to the base 50, and the driving block 51 swings back and forth around the first opening 51a under the drive of the second driving source 511. The second opening 51b is hinged to the first end (i.e., the front end) of the eighth connecting rod 58 through the fifth connecting rod 55. The upper end of the driving rod 52 is provided with a third rotation center, and the third rotation center is hinged to the base 50. The driving rod 52 swings back and forth around the third rotation center under the drive of the third driving source 521. The lower end of the driving rod 52 is hinged to the middle part of the sixth connecting rod 56 through the seventh connecting rod 57, and the lower end of the sixth connecting rod 56 is hinged to the second end (i.e., the right end) of the eighth connecting rod 58. The passive block 53 is triangular, and includes a first end with a fourth opening 53a, a second end with a fifth opening 53b, and a third end 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 hinged to the base 50. The fifth opening 53b is hinged to the upper end of the sixth connecting rod 56. The sixth opening 53c is hinged to the third opening 51c through the fourth connecting rod 54. The push handle 59 is fixedly arranged at the front end of the eighth connecting rod 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, and L15=L16.

[0093] The second driving source 511 and the third driving source 521 are both servo motors. The two servo motors work together to execute different motion rules, so that the double-degree-of-freedom connecting rod mechanism drives the pusher 59 to move from the starting position near the conveyor belt 1 (i.e., the rear end point of the horizontal straight path L1) to the side where the packaging wheel 2 is located, and moves along the horizontal straight path L1 to make a translational motion, and push the final folded cigarette package W out of the mold box 41 until it is pushed into the packaging wheel 2. Then the double-degree-of-freedom connecting rod mechanism drives the pusher 59 to move from the side where the packaging wheel 2 is located to the starting position. In this process, the pusher 59 first gradually rises along the inclined straight path L2, avoids the folding component 4 that moves linearly with the reciprocating mold box component 3 below, and then descends along the vertical straight path L3. While folding the upper short side 74 of the secondary folded inner package Z to form the final folded inner package W, it returns to the starting position and is ready to push the final folded inner package W. Thus, a motion trajectory is formed in which the pusher 59 moves linearly during the pushing process and first rises to avoid and then descends during the return process.

[0094] like Figure 1 and Figure 4 As shown, the working principle of the cigarette pack conveying and folding device of the present invention is as follows:

[0095] When the unfolded inner package X on the conveyor belt 1 is pushed into the folding assembly 4, the reciprocating mold box assembly 3 will carry the folding assembly 4 and accelerate away from the conveyor belt 1, creating a certain distance from it; during the forward movement of the reciprocating mold box assembly 3, the left folding corner 71, the right folding corner 72 and the lower short side 73 of the unfolded inner package X are folded by the folding assembly 4 to form a secondary folded cigarette package Z; at this time, the pusher 59 in the pusher assembly 5 just moves to the top of the secondary folded cigarette package Z (i.e., the rear end point of the inclined straight path L2), and then the pusher 59 moves downward to fold the upper short side 74 into place, forming a final folded inner package W with left and right folding corners and upper and lower short sides all fitting the rear end surface of the cigarette group 6. Then the pusher 59 moves horizontally to push the final folded inner package W into the corresponding mold box of the packaging wheel B2, and then returns to the top of the next secondary folded cigarette package Z in an ascending posture.

[0096] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A cigarette pack conveying and folding device, arranged between a conveyor belt and a packaging wheel, characterized in that: include: The reciprocating mold box assembly includes a first driving source and two single-degree-of-freedom six-bar mechanisms, the tops of the two single-degree-of-freedom six-bar mechanisms are provided with connecting plates, the first driving source drives the two single-degree-of-freedom six-bar mechanisms to move, and drives the connecting plates to perform linear reciprocating motion; A folding assembly, comprising a mold box arranged on the connecting plate, two first folding fingers and a second folding finger, wherein the mold box is used to provide a conveying channel for the cigarette inner pack to enter the packaging wheel from the conveyor belt; the two first folding fingers are rotatably arranged on both sides of the mold box, and are used to fold the left corner and the right corner of the cigarette inner pack; the second folding finger is rotatably arranged at the bottom of the mold box, and is used to fold the lower short side of the cigarette inner pack; The push handle assembly includes a second driving source, a third driving source and a double-degree-of-freedom connecting rod mechanism. The double-degree-of-freedom connecting rod mechanism is provided with a push handle. The second driving source and the third driving source work together to drive the double-degree-of-freedom connecting rod mechanism to move, drive the push handle to translate, and first rise and then fall when returning to the starting position. The push handle is used to fold the upper short side of the cigarette inner package and push the cigarette inner package out of the mold box.

2. The cigarette pack conveying and folding device according to claim 1, characterized in that: The single-degree-of-freedom six-bar mechanism comprises a frame, a first connecting rod, a second connecting rod and a third connecting rod, and the two single-degree-of-freedom six-bar mechanisms are connected via 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 hingedly connected 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 a passive shaft swing arm is provided at its end. 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. The passive shaft is coaxially arranged with the second rotation center.

3. The cigarette pack conveying and folding device according to claim 2, characterized in that: 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 cigarette pack conveying and folding device according to claim 1, characterized in that: The first folding finger and the second folding finger are each driven to rotate by an independent driving source.

5. The cigarette pack conveying and folding device according to claim 4, characterized in that: The independent driving source is a servo motor or a cam.

6. The cigarette pack conveying and folding device according to claim 1, characterized in that: The dual-freedom linkage mechanism includes a base, 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 hinged to the base; the second end of the driving block is provided with a second opening, and the second opening is hinged to the first end of the eighth connecting rod through the fifth connecting rod; the third end of the driving block is provided with a third opening; The upper end of the driving rod is provided with a third rotation center hinged to the machine base, and the lower end thereof is hinged to the middle part of the sixth connecting rod through the seventh connecting rod, and 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 which is concentric with the third rotation center and hinged to the base; the second end of the passive block is provided with a fifth opening which is hinged to the upper end of the sixth connecting rod; the third end of the passive block is provided with a sixth opening which is hinged to the third opening via the fourth connecting rod; The push handle is fixedly arranged at the first end of the eighth connecting rod.

7. The cigarette pack conveying and folding device according to claim 6, characterized in that: The center distance between the first opening and the fourth opening is L7, the center distance between the first opening and the third opening is L8, the center distance between the first opening and the second opening is L9, the center distance between the fourth opening and the sixth opening is L10, the center distance between the fourth opening and the fifth opening is L11, the length of the fourth connecting rod is L12, the length of the eighth connecting rod is L13, L7=L12=L13, L8=L10, L9=L11.

8. The cigarette pack conveying and folding device according to claim 1, characterized in that: The first driving source is a servo motor or a cam-link mechanism.

9. The cigarette pack conveying and folding device according to claim 1, characterized in that: The second driving source and the third driving source are both servo motors.

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