A double-pull wire device for cigarette packs

Abstract

This invention discloses a double-thread cigarette pack device, comprising a main frame; a double-thread paper feeding roller mechanism, including a drive shaft mounted on the main frame, a friction wheel mounted on the drive shaft, and two paper feeding rollers; a damping mechanism mounted on the main frame and in contact with the friction wheel to prevent the paper feeding rollers from rebounding; a double-rocker guide roller mechanism mounted on the main frame, comprising two independently operating guide roller groups; a multi-stage progressive guide roller mechanism, all mounted on the main frame and extending to the end of the main frame; a guide angle adjustment mechanism mounted at the end of the main frame to adjust the double-thread angle; and an adjustable final guide roller mounted at the very end of the main frame to perform the final spacing adjustment of the double-thread exiting from the guide angle adjustment mechanism. This device has no separate electric drive or electrical control, high integration, simple structure, convenient installation, flexible adjustment, high reliability, and reduced cost.

Description

Technical Field

[0001] This invention relates to the field of cigarette packaging equipment technology, and in particular to a double-pull-string device for cigarette packs. Background Technology

[0002] With increasing market demand and the development of various new types of cigarette pack packaging, the cigarette industry has introduced a double-pull-string process for small cigarette packs in terms of product structure. For example, CN209634885U provides a cigarette pack with a double-pull-string structure, with two pull strings located at the top and bottom of the pack, but the two pull strings are far apart, requiring consumers to tear them off from different positions. The production of this type of cigarette pack requires a specialized double-pull-string bonding device.

[0003] Patent ZL200820074596.X proposes a double-pull-wire bonding device for cigarette packs by adding a bonding device to the existing single-pull-wire bonding mechanism. However, due to the use of two bonding devices, its structure is relatively complex and difficult to debug. Therefore, it is particularly necessary to develop a double-pull-wire device with a simpler structure. Summary of the Invention

[0004] This invention provides a double-threaded cigarette pack device to solve the problems of complex structure and troublesome debugging of existing double-threaded bonding devices.

[0005] The technical solution adopted in this invention is: to provide a double-pull cord device for cigarette packs, comprising:

[0006] Main rack;

[0007] The double-pull paper feed roller mechanism includes a drive shaft mounted on the main frame, a friction wheel mounted on the drive shaft, and two paper feed rollers.

[0008] A damping mechanism, mounted on the main frame and in contact with the friction wheel, is used to prevent the paper feed roller from rebounding.

[0009] A double-rocker guide roller mechanism is installed on the main frame and includes two independently operating guide roller groups;

[0010] The multi-stage progressive guide roller mechanism is installed on the main frame and extends all the way to the end of the main frame;

[0011] A guide angle adjustment mechanism is installed at the end of the main frame to adjust the angle of the double pull wires;

[0012] An adjustable final guide roller, installed at the very end of the main frame, performs the final spacing adjustment of the double pull lines coming out from the guide angle adjustment mechanism.

[0013] Furthermore, the double-rocker guide roller mechanism includes:

[0014] A rotating shaft, one end of which is fixed to the main frame;

[0015] The first tensioning swing rod has its middle part rotatably connected to the rotating shaft, and a first guide roller group is fixed at one end of the first tensioning swing rod;

[0016] A tension spring, one end of which is fixed to the main frame and the other end of which is fixed to the other end of the first tensioning swing rod, is used to provide tension to the other end of the first tensioning swing rod.

[0017] The second tensioning swing rod has its middle part rotatably connected to the rotating shaft, and a second guide roller group is fixed to one end of the second tensioning swing rod. There is no connection between the first guide roller group and the second guide roller group.

[0018] Support plate assembly for providing support force to the rotation axis; and

[0019] A torsion spring is used to provide torque when the second tensioning lever rotates;

[0020] During operation, the tension spring and torsion spring adjust the tension of the upper pull wires of the first guide roller group and the second guide roller group respectively, so as to realize the independent and stable operation of the double pull wires.

[0021] Furthermore, the double-rocker guide roller mechanism also includes:

[0022] A first sliding bearing is sleeved on the rotating shaft, and a first tensioning rocker arm is fixed to the first sliding bearing; and...

[0023] The third sliding bearing is sleeved on the rotating shaft, and the second tensioning rocker arm is fixed on the third sliding bearing;

[0024] A first limiting rod is provided on the first sliding bearing or the first tensioning swing rod, and a notch is provided on the main frame to limit the first limiting rod;

[0025] One end of the torsion spring is fixed to the third sliding bearing, and the other end is fixed to the support plate assembly.

[0026] Furthermore, the support plate assembly includes a support plate and a first support plate, a second support plate, and a third support plate fixed on the support plate;

[0027] The first support plate is fixed to the frame;

[0028] The second support plate is fixed on the rotating shaft, or the second support plate is fixed on the bushing sleeve fitted on the rotating shaft;

[0029] One end of the torsion spring is fixed to the third support plate, and the other end is fixed to the third sliding bearing;

[0030] The other end of the second tensioning swing rod is provided with a second limiting rod, and the third support plate is provided with a limiting hole for limiting the second limiting rod.

[0031] Furthermore, the first guide roller group and the second guide roller group each have three guide rollers, and the gap between the middle of the guide rollers decreases sequentially.

[0032] Furthermore, the multi-stage progressive guide roller mechanism includes a third guide roller group, a fourth guide roller group, a fifth guide roller group, and a sixth guide roller group; each of the third, fourth, fifth, and sixth guide roller groups includes a guide roller shaft and two guide rollers that rotate independently on the guide roller shaft.

[0033] Furthermore, the damping mechanism includes:

[0034] Support, installed on the main frame;

[0035] The balance shaft is connected at one end to the support.

[0036] A self-balancing block is installed at the other end of the balance shaft;

[0037] The spring is sleeved on the balance shaft and located between the support and the self-balancing block, and is always in a compressed state;

[0038] A guide shaft is connected between the support and the self-balancing block;

[0039] A friction layer is disposed on the surface of the self-balancing block and is in contact with the friction wheel;

[0040] An adjusting nut, mounted on the balance shaft, is used to adjust the compression of the spring.

[0041] Furthermore, the guide angle adjustment mechanism includes:

[0042] A first adjusting plate, a second adjusting plate, and a shaft core; the first adjusting plate and the second adjusting plate are hinged together by the shaft core to form a V-shaped structure.

[0043] The first roller and the second roller are respectively installed on the outer side walls of the first adjusting plate and the second adjusting plate;

[0044] A connecting frame and an adjusting bracket, wherein the connecting frame is mounted on the main frame and the adjusting bracket is slidably mounted on the connecting frame; and

[0045] An adjustment assembly is provided, which, along with the shaft, is mounted on the adjustment bracket. The adjustment assembly is used to adjust the angle between the first adjustment plate and the second adjustment plate.

[0046] Further, the adjustment assembly includes a first adjusting bolt, a wedge-shaped adjusting block, a first locking nut, a first T-shaped slider, a second T-shaped slider, and a third T-shaped slider; the inner sidewalls of the first and second adjusting plates are respectively provided with a first T-shaped groove and a second T-shaped groove perpendicular to the shaft core direction; the second T-shaped slider and the third T-shaped slider are respectively fixedly installed on both sides of the wedge-shaped adjusting block, and the second T-shaped slider and the third T-shaped slider slide in the first T-shaped groove and the second T-shaped groove respectively; the first adjusting bolt is threaded into a threaded hole provided on the adjusting bracket, the wedge-shaped adjusting block is provided with a third T-shaped groove parallel to the shaft core direction, one end of the first T-shaped slider is located in the third T-shaped groove, and the other end of the first T-shaped slider is fixedly connected to one end of the first adjusting bolt; the first locking nut is sleeved on the first adjusting bolt.

[0047] Furthermore, the adjustable final guide roller includes:

[0048] The second adjusting bolt is installed at the far end of the main frame;

[0049] The second locking nut is installed on the second adjusting bolt;

[0050] The eighth guide roller group includes two guide rollers, which are mounted on the second adjusting bolt;

[0051] The positioning sleeve is installed on the second adjusting bolt and is located between the two guide rollers of the eighth guide roller group.

[0052] The beneficial effects of this invention are:

[0053] 1) The characteristic of this cigarette pack double-pull line device is that it has no separate electric drive and electrical control. The double swing arm guide roller mechanism has two independent tensioning swing arms. When the double pull line is installed, the two pull lines are independently wound with each roller, which is convenient to install and use. During the conveying operation, the damping mechanism on it forms a balance, ensuring that the double pull line paper feeding roller mechanism can rotate freely without power while avoiding paper roll rebound. At the same time, before the double pull line enters the adjustable final guide roller that has been adjusted according to the process requirements, the angle and lateral position on the guide angle adjustment mechanism are adjusted to achieve the purpose of double pull line transmission.

[0054] 2) This device has a simple structure, high integration, convenient installation, flexible adjustment, strong reliability, and reduced costs. Using this technology can meet product process requirements and achieve the original operating efficiency of the equipment. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the structure of the double-pull-wire device for cigarette packs without winding double pull wires, as disclosed in an embodiment of the present invention.

[0056] Figure 2 This is a schematic diagram of the structure of the double-pull-wire device for cigarette packs with double pull wires wound according to an embodiment of the present invention.

[0057] Figure 3 This is a schematic diagram of the structure of the double rocker guide roller mechanism disclosed in an embodiment of the present invention.

[0058] Figure 4 This is another structural schematic diagram of the double rocker guide roller mechanism disclosed in an embodiment of the present invention.

[0059] Figure 5 This is a schematic diagram of the damping mechanism and the double-pull paper feed roller mechanism disclosed in the embodiments of the present invention.

[0060] Figure 6 This is a schematic diagram of the guide angle adjustment mechanism disclosed in an embodiment of the present invention.

[0061] Figure 7 This is a front view of the guide angle adjustment mechanism disclosed in an embodiment of the present invention.

[0062] Figure 8 This is a left view of the guide angle adjustment mechanism disclosed in an embodiment of the present invention.

[0063] Figure 9 This is a top view of the guide angle adjustment mechanism disclosed in an embodiment of the present invention.

[0064] Figure 10 This is a schematic diagram of the adjustable final guide roller disclosed in an embodiment of the present invention.

[0065] Attached reference numerals: 1. Main frame; 11. Notch;

[0066] 2. Double-pull paper feed roller mechanism; 21. Paper feed roller; 22. Drive shaft; 23. Locking handwheel; 24. Friction wheel;

[0067] 3. Damping mechanism; 31. Support; 32. Balance shaft; 33. Self-balancing block; 34. Spring; 35. Friction layer; 36. Adjusting nut; 37. Guide shaft; 38. Pressure plate;

[0068] 4. Double-swing rod guide roller mechanism; 41. First tensioning swing rod; 411. First guide roller group; 412. First limiting rod; 413. Pull rod; 42. Second tensioning swing rod; 421. Second guide roller group; 422. Second limiting rod; 43. Tension spring; 44. Torsion spring; 45. Rotating shaft; 46. Support plate; 461. First support plate; 462. Second support plate; 463. Third support plate; 4631. Limiting hole; 47. First sliding bearing; 48. Second sliding bearing; 49. Third sliding bearing;

[0069] 5. Guide angle adjustment mechanism; 51. Connecting frame; 52. Adjusting bracket; 521. Slider; 53. First adjusting bolt; 531. First T-shaped slider; 54. Shaft core; 55. First roller; 56. Second roller; 57. First adjusting plate; 571. First T-shaped slide groove; 58. Second adjusting plate; 581. Second T-shaped slide groove; 59. Wedge-shaped adjusting block; 591. Third T-shaped slide groove; 592. Second T-shaped slider; 510. First locking nut;

[0070] 6. Adjustable final guide roller; 61. Second adjusting bolt; 62. Second locking nut; 63. Eighth guide roller group; 64. Positioning sleeve;

[0071] 7. Multi-stage progressive guide roller mechanism; 71. Third guide roller group; 72. Fourth guide roller group; 73. Fifth guide roller group; 74. Sixth guide roller group;

[0072] 8. Double pull wire. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0074] Example 1:

[0075] See Figure 1-2 A double-thread cigarette pack device includes: a main frame 1; a double-thread paper feeding roller mechanism 2, including a drive shaft 22 mounted on the main frame 1, a friction wheel 24 mounted on the drive shaft 22, and two paper feeding rollers 21, the two paper feeding rollers 21 being locked by a locking handwheel 23 mounted on the drive shaft 22; a damping mechanism 3, mounted on the main frame 1 and in contact with the friction wheel 24, for preventing the paper feeding rollers 21 from rebounding; a double-rocker guide roller mechanism 4, mounted on the main frame 1, including two independently operating guide roller groups; a multi-stage progressive guide roller mechanism 7, all mounted on the main frame 1 and extending to the end of the main frame 1; a guide angle adjustment mechanism 5, mounted at the end of the main frame 1, for adjusting the angle of the double-thread 8; and an adjustable final guide roller 6, mounted at the very end of the main frame 1, for final spacing adjustment of the double-thread 8 exiting from the guide angle adjustment mechanism 5.

[0076] See Figure 3-4In this embodiment, the double-swing rod guide roller mechanism includes: a rotating shaft 45, one end of which is fixed to the frame; a first tensioning swing rod 41, the middle part of which is rotatably connected to the rotating shaft 45, and a first guide roller group 411 fixed to one end of the first tensioning swing rod 41; a tension spring 43, which provides tension to the other end of the first tensioning swing rod 41, specifically, one end of the tension spring 43 is fixed to the main frame 1, and the other end is fixed to the pull rod 413 located at the other end of the first tensioning swing rod 41; a second tensioning swing rod 42, the middle part of which is rotatably connected to the rotating shaft 45, and a second guide roller group 421 fixed to one end of the second tensioning swing rod 42, wherein the first guide roller group 411 and the second guide roller group 421 are not connected and operate independently of each other; a support plate assembly, which provides support to the rotating shaft 45; and a torsion spring 44, which provides torque when the second tensioning swing rod 42 rotates.

[0077] In this embodiment, the first tensioning lever 41 and the second tensioning lever 42 are integrated on a rotating shaft 45, and each set of guide rollers can adjust different tensions (torques) through their respective spring structures to overcome the external forces on each tension line, thereby enabling both tension lines to run independently and smoothly.

[0078] In this embodiment, the first tensioning lever 41 is rotatably connected to the rotating shaft 45 by setting a first sliding bearing 47. Specifically, the first sliding bearing 47 is sleeved on the rotating shaft 45, and the first tensioning lever 41 is fixed on the first sliding bearing 47.

[0079] In this embodiment, in order to ensure that both tensioning wires can operate smoothly, the swing of the first tensioning lever 41 cannot be too large. Therefore, a notch 11 is designed on the main frame 1, and a first limiting rod 412 is provided on the first sliding bearing 47 or the first tensioning lever 41. Thus, the notch 11 becomes the maximum range of motion of the first limiting rod 412, which in turn becomes the maximum range of motion of the first tensioning lever 41.

[0080] In this embodiment, the second tensioning swing rod 42 is rotatably connected to the rotating shaft 45 by setting a third sliding bearing 49. Specifically, the third sliding bearing 49 is sleeved on the rotating shaft 45, and the second tensioning swing rod 42 is fixed on the third sliding bearing 49. In order to ensure more stable rotation of the second tensioning swing rod 42, a second sliding bearing 48 can also be sleeved on the rotating shaft 45, and the second tensioning swing rod 42 is fixed between the second sliding bearing 48 and the third sliding bearing 49.

[0081] It should be noted that the rotating shaft 45 is fixedly mounted on the main frame 1 and does not rotate relative to the main frame 1. The first tensioning lever 41 is fixed on the first sliding bearing 47 and can rotate independently around the rotating shaft 45; the second tensioning lever 42 is fixed on the second sliding bearing 48 and the third sliding bearing 49 and can also rotate independently around the rotating shaft 45; furthermore, there is no connection between the first guide roller group 411 and the second guide roller group 421, so the first tensioning lever 41 and the second tensioning lever 42 rotate independently on the rotating shaft 45.

[0082] In this embodiment, the support plate assembly supports the rotating shaft 45 in the following manner: the support plate assembly includes a support plate 46 and a first support plate 461 and a second support plate 462 fixed to the support plate 46. The first support plate 461 is fixed to the main frame 1; the second support plate 462 is fixed to the rotating shaft 45. Furthermore, the second support plate 462 can also be fixed to a bushing (not shown in the figure) sleeved on the rotating shaft 45. Through the fixing of the first support plate 461 and the second support plate 462, the rotating shaft 45 can be vertically fixed to the main frame 1.

[0083] In this embodiment, the support plate assembly further includes a third support plate 463 fixed on the support plate 46, and one end of the torsion spring 44 ( Figure 3 The middle left end) is fixed to the third support plate 463, and the other end ( Figure 3 The right end is fixed to the third sliding bearing 49. Specifically, as shown... Figure 3 As shown, a through hole can be provided on the third support plate 463. The through hole is located on the outer ring of the third sliding bearing 49 and has no connection with the third sliding bearing 49.

[0084] In this embodiment, a second limiting rod 422 is provided at the other end of the second tensioning swing rod 42, and a limiting hole 4631 is provided on the third support plate 463 to limit the second limiting rod 422. The function of providing the limiting hole 4631 is the same as the function of providing the notch 11 on the main frame 1, and will not be described again here.

[0085] The torsion spring 44 is provided to buffer the rotation of the second tensioning lever 42. Therefore, in some embodiments, it is not necessary to provide a third support plate. One end of the torsion spring 44 is fixed to the third sliding bearing 49, and the other end is fixed to the rotating shaft 45.

[0086] In this embodiment, the first guide roller group 411 and the second guide roller group 421 each have three guide rollers, and the gap between the middle of the guide rollers decreases sequentially, so as to gradually gather the double pull line 8 on the guide rollers.

[0087] See Figure 1-2In this embodiment, the multi-stage progressive guide roller mechanism 7 includes a third guide roller group 71, a fourth guide roller group 72, a fifth guide roller group 73, and a sixth guide roller group 74; each of the third guide roller group 71, the fourth guide roller group 72, the fifth guide roller group 73, and the sixth guide roller group 74 includes a guide roller shaft and two guide rollers that rotate independently on the guide roller shaft.

[0088] See Figure 5 In this embodiment, the damping mechanism 3 includes: a support 31 mounted on the main frame 1; a balance shaft 32, one end of which is connected to the support 31; a self-balancing block 33 mounted on the other end of the balance shaft 32; a spring 34 sleeved on the balance shaft 32 and located between the support 31 and the self-balancing block 33, and always in a compressed state; a guide shaft 37 connected between the support 31 and the self-balancing block 33; a friction layer 35 fixed to the surface of the self-balancing block 33 by a pressure plate 38 and in contact with the friction wheel 24; and an adjusting nut 36 mounted on the balance shaft 32 for adjusting the compression of the spring 34. The friction layer 35 can be a leather belt. The friction wheel 24 on the double-pull paper feed roller mechanism 2 and the leather belt on the damping mechanism 3, through the pressure of the spring 34, ensure that the paper feed roller 21 generates appropriate resistance, ensuring that the double-pull paper feed roller mechanism 2 can rotate freely without power while preventing the paper feed roller 21 from rebounding.

[0089] See Figure 6-9 In this embodiment, the guide angle adjustment mechanism 5 includes: a first adjustment plate 57, a second adjustment plate 58, and a shaft core 54. The first adjustment plate 57 and the second adjustment plate 58 are hinged together by the shaft core 54 to form a V-shaped structure; a first roller 55 and a second roller 56, which can be bolted to the outer side walls of the first adjustment plate 57 and the second adjustment plate 58 respectively; a connecting frame 51 and an adjusting bracket 52, the connecting frame 51 being installed at the end of the main frame 1, and the adjusting bracket 52 being slidably installed on the connecting frame 51; and an adjusting assembly, the adjusting assembly and the shaft core 54 being installed on the adjusting bracket 52. The adjusting assembly is used to adjust the angle between the first adjustment plate 57 and the second adjustment plate 58, thereby changing the angle and thus changing the spacing between the double pull lines 8.

[0090] In this embodiment, the adjustment assembly includes a first adjusting bolt 53, a wedge-shaped adjusting block 59, a first locking nut 510, a second T-shaped slider 592, and a third T-shaped slider (not shown in the figure). The inner walls of the first adjusting plate 57 and the second adjusting plate 58 are respectively provided with a first T-shaped groove 571 and a second T-shaped groove 581 perpendicular to the direction of the shaft core 54. The second T-shaped slider 592 and the third T-shaped slider are respectively fixedly installed on both sides of the wedge-shaped adjusting block 59, and the second T-shaped slider 592 and the third T-shaped slider slide within the first T-shaped groove 571 and the second T-shaped groove 581, respectively. The first adjusting bolt 53 is threaded into a threaded hole provided on the adjusting bracket 52, and one end of the first adjusting bolt 53 is connected to the wedge-shaped adjusting block 59. The first locking nut 510 is sleeved on the first adjusting bolt 53. By rotating the first adjusting bolt 53, the wedge-shaped adjusting block 59 can be pushed or pulled, thereby adjusting the angle between the first adjusting plate 57 and the second adjusting plate 58.

[0091] The second T-shaped slider 592 and the third T-shaped slider can also hold the first adjusting plate 57 and the second adjusting plate 58. In some embodiments, a spring can be set between the first adjusting plate 57 and the second adjusting plate 58. However, since the first roller 55 and the second roller 56 are always under the force of the double pull line 8, the spring setting will cause the distance between the double pull lines 8 to change due to the spring force. Therefore, the setting of the second T-shaped slider 592 and the third T-shaped slider in this embodiment is a better method.

[0092] Furthermore, the adjustment assembly also includes a first T-shaped slider 531, and the wedge-shaped adjusting block 59 is provided with a third T-shaped groove 591 parallel to the direction of the shaft core 54. One end of the first T-shaped slider 531 is located in the third T-shaped groove 591, and the other end of the first T-shaped slider 531 is fixedly connected to one end of the first adjusting bolt 53. By setting the first T-shaped slider 531 and the third T-shaped groove 591, the wedge-shaped adjusting block 59 and the first adjusting bolt 53 are detachably connected, so that the wedge-shaped adjusting block 59 can be replaced according to specific circumstances.

[0093] Specifically, a slider 521 is fixed on the adjusting bracket 52, and a slide rail is provided on the connecting frame 51 for the slider 521 to slide, so that the adjusting bracket 52 can slide horizontally on the connecting frame 51, that is, it can be adjusted laterally.

[0094] The working principle of this guide angle adjustment mechanism 5 is as follows: This guide angle adjustment mechanism 5 is installed on the main frame 1 at the end of the cigarette pack double pull line bonding device through the connecting frame 51. The double pull lines 8 are respectively located in the groove between the first roller 55 and the second roller 56. The adjustment bracket 52 is adjusted horizontally according to the installation environment. Then, the first adjustment bolt 53 is rotated to adjust the wedge adjustment block 59 to adjust the angle between the first adjustment plate 57 and the second adjustment plate 58, thereby changing the spacing between the double pull lines 8. The double pull lines 8, after passing through the first roller 55 and the second roller 56, and then passing through the last adjustable final guide roller 6 with a set spacing, can be bonded to the transparent paper (not shown in the figure).

[0095] See Figure 10 In this embodiment, the adjustable final guide roller 6 includes: a second adjusting bolt 61, installed at the far end of the main frame 1; a second locking nut 62, installed on the second adjusting bolt 61; an eighth guide roller group 63, including two guide rollers, installed on the second adjusting bolt 61; and a positioning sleeve 64, installed on the second adjusting bolt 61 and located between the two guide rollers of the eighth guide roller group 63, for adjusting the distance between the two guide rollers. The minimum size requirement for the double-drawing wire 8 is achieved when the two guide rollers in the adjustable final guide roller 6 are completely pressed together. When the size of the double-drawing wire 8 changes, the requirement can be met by replacing the positioning sleeve 64 with one of a different size.

[0096] The principle of this invention is as follows: See Figure 2 Under the tension of the double pull line 8, the drive shaft 22 rotates, releasing the double pull line 8 on the paper feed roller 21. The double pull line 8 passes sequentially through the first guide roller on the first guide roller group 411 and the second guide roller group 421, the third guide roller group 71, the second guide roller on the first guide roller group 411 and the second guide roller group 421, the fourth guide roller group 72, the third guide roller on the first guide roller group 411 and the second guide roller group 421, the fifth guide roller group 73, the sixth guide roller group 74, the guide angle adjustment mechanism 5, and the adjustable final guide roller 6, and finally comes into contact with the transparent paper (not shown in the figure). During the process of the double pull line 8 passing through the above guide rollers, the gap continuously decreases until the adjustable final guide roller 6 adjusts the gap of the double pull line 8 to the set gap.

[0097] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-pull-wire device for cigarette packs, comprising a main frame, characterized in that, Also includes: The double-pull paper feed roller mechanism includes a drive shaft mounted on the main frame, a friction wheel mounted on the drive shaft, and two paper feed rollers. A damping mechanism, mounted on the main frame and in contact with the friction wheel, is used to prevent the paper feed roller from rebounding. A double-rocker guide roller mechanism is installed on the main frame and includes two independently operating guide roller groups; The multi-stage progressive guide roller mechanism is installed on the main frame and extends all the way to the end of the main frame; A guide angle adjustment mechanism is installed at the end of the main frame to adjust the angle of the double pull wires; The guide angle adjustment mechanism includes: A first adjusting plate, a second adjusting plate, and a shaft core; the first adjusting plate and the second adjusting plate are hinged together by the shaft core to form a V-shaped structure. The first roller and the second roller are respectively installed on the outer side walls of the first adjusting plate and the second adjusting plate; A connecting frame and an adjusting bracket are provided, wherein the connecting frame is mounted on the main frame and the adjusting bracket is slidably mounted on the connecting frame. And an adjustment assembly, wherein the adjustment assembly and the shaft are mounted on the adjustment bracket, and the adjustment assembly is used to adjust the angle between the first adjustment plate and the second adjustment plate; An adjustable final guide roller, installed at the very end of the main frame, performs the final spacing adjustment of the double pull lines coming out from the guide angle adjustment mechanism; The adjustment assembly includes a first adjusting bolt, a wedge-shaped adjusting block, a first locking nut, a first T-shaped slider, a second T-shaped slider, and a third T-shaped slider. The inner walls of the first and second adjusting plates are respectively provided with a first T-shaped groove and a second T-shaped groove perpendicular to the shaft center direction. The second and third T-shaped sliders are respectively fixedly installed on both sides of the wedge-shaped adjusting block, and slide within the first and second T-shaped grooves respectively. The first adjusting bolt is threaded into a threaded hole on the adjusting bracket. The wedge-shaped adjusting block is provided with a third T-shaped groove parallel to the shaft center direction. One end of the first T-shaped slider is located in the third T-shaped groove, and the other end of the first T-shaped slider is fixedly connected to one end of the first adjusting bolt. The first locking nut is sleeved on the first adjusting bolt. The adjustable final guide roller includes: The second adjusting bolt is installed at the far end of the main frame; The second locking nut is installed on the second adjusting bolt; The eighth guide roller group includes two guide rollers, which are mounted on the second adjusting bolt; The positioning sleeve is installed on the second adjusting bolt and is located between the two guide rollers of the eighth guide roller group.

2. The double-pull-wire device for cigarette packs according to claim 1, characterized in that, The double-rocker guide roller mechanism includes: A rotating shaft, one end of which is fixed to the main frame; The first tensioning swing rod has its middle part rotatably connected to the rotating shaft, and a first guide roller group is fixed at one end of the first tensioning swing rod; A tension spring, one end of which is fixed to the main frame and the other end of which is fixed to the other end of the first tensioning swing rod, is used to provide tension to the other end of the first tensioning swing rod. The second tensioning swing rod has its middle part rotatably connected to the rotating shaft, and a second guide roller group is fixed to one end of the second tensioning swing rod. There is no connection between the first guide roller group and the second guide roller group. Support plate assembly for providing support force to the rotation axis; and A torsion spring is used to provide torque when the second tensioning lever rotates; During operation, the tension spring and torsion spring adjust the tension of the upper pull wires of the first guide roller group and the second guide roller group respectively, so as to realize the independent and stable operation of the double pull wires.

3. The double-pull-wire device for cigarette packs according to claim 2, characterized in that, The double-rocker guide roller mechanism also includes: A first sliding bearing is sleeved on the rotating shaft, and a first tensioning rocker arm is fixed to the first sliding bearing; and... The third sliding bearing is sleeved on the rotating shaft, and the second tensioning rocker arm is fixed on the third sliding bearing; A first limiting rod is provided on the first sliding bearing or the first tensioning swing rod, and a notch is provided on the main frame to limit the first limiting rod; One end of the torsion spring is fixed to the third sliding bearing, and the other end is fixed to the support plate assembly.

4. The double-pull-wire device for cigarette packs according to claim 3, characterized in that, The support plate assembly includes a support plate and a first support plate, a second support plate, and a third support plate fixed on the support plate. The first support plate is fixed to the frame; The second support plate is fixed on the rotating shaft, or the second support plate is fixed on the bushing sleeve fitted on the rotating shaft; One end of the torsion spring is fixed to the third support plate, and the other end is fixed to the third sliding bearing; The other end of the second tensioning swing rod is provided with a second limiting rod, and the third support plate is provided with a limiting hole for limiting the second limiting rod.

5. The double-pull-wire device for cigarette packs according to claim 4, characterized in that, The first guide roller group and the second guide roller group each have three guide rollers, and the gap between the middle of the guide rollers decreases sequentially.

6. The double-pull-wire device for cigarette packs according to claim 5, characterized in that, The multi-stage progressive guide roller mechanism includes a third guide roller group, a fourth guide roller group, a fifth guide roller group, and a sixth guide roller group; each of the third, fourth, fifth, and sixth guide roller groups includes a guide roller shaft and two guide rollers that rotate independently on the guide roller shaft.

7. The double-pull-wire device for cigarette packs according to claim 1, characterized in that, The damping mechanism includes: Support, installed on the main frame; The balance shaft is connected at one end to the support. A self-balancing block is installed at the other end of the balance shaft; The spring is sleeved on the balance shaft and located between the support and the self-balancing block, and is always in a compressed state; A guide shaft is connected between the support and the self-balancing block; A friction layer is disposed on the surface of the self-balancing block and is in contact with the friction wheel; An adjusting nut, mounted on the balance shaft, is used to adjust the compression of the spring.

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