A transverse sealing device and a packaging machine using the same

Abstract

The present application relates to the technical field of sealing devices for sealing or fastening packages, and in particular to a transverse sealing device and a packaging machine using the same. A transverse sealing device includes a frame, an upper heat sealing part and a lower heat sealing part arranged on the frame, the upper heat sealing part and the lower heat sealing part can interfere with each other, and the movement trajectories of the upper heat sealing part and the lower heat sealing part are both "D"-shaped. The technical solution of the present application can ensure sufficient heat sealing during transverse sealing, and ensure the quality and excellent effect of transverse sealing; during heat sealing, the upper swing arm and the lower swing arm continue to move to prepare for the next heat sealing, without delaying the next heat sealing time, speeding up the time for resetting the upper heat sealing part and the lower heat sealing part, and improving the heat sealing efficiency of transverse sealing; low noise; easy to maintain and repair; transversely sealed products are not easy to fall off the conveying device.

Description

Technical Field

[0001] The present application relates to the technical field of sealing devices for sealing or fastening packages, and in particular to a transverse sealing device and a packaging machine using the same. Background Art

[0002] The horizontal sealing device is an important component of the packaging machine. It is a mechanical component that seals the packaging bag filled with packaging materials. The sealing process is generally done by heat sealing. Heat sealing is achieved by pressing the plastic film up and down. When the heat sealing component clamps the plastic film, the sealing part of the film is heated and becomes a viscous flow state, and the two layers of film are fused into one with the help of pressure.

[0003] Existing transverse sealing devices mostly use a cam-type design. These devices utilize a cam mechanism for transmission. The cam is a component with a curved profile. During movement, the cam's profile drives the follower, which in turn drives the swing arm up and down, achieving the clamping and unclamping of the heat sealer. During the heat sealing process, the heat sealing component moves downward. After contacting the plastic film, the upper and lower parts of the heat sealing component need to maintain contact for a period of time to achieve a sufficient heat seal. Once completed, the heat sealing component moves upward again, positioning the package, before moving downward again for the next heat seal.

[0004] In the above technology, although the upper and lower heat-sealing components maintain contact for a short time, it still limits the packaging speed. The current packaging speed of a general cam-type transverse sealing device is 150 times / minute. This maintenance of contact delays the reset time of the upper and lower heat-sealing components, thereby reducing the transverse sealing efficiency. The cam transmission requires the installation of cams of the same structure at both ends of the assembly line, which are fixed and positioned at both ends. The assembly line and most of the transmission structure are covered by the cam transmission mechanism, making maintenance and repair inconvenient. During the movement of the cam, there is friction between its contour and the parts it contacts, resulting in high noise. Summary of the Invention

[0005] In order to speed up the resetting time of the upper and lower heat-sealing components, in a first aspect, the present application provides a transverse sealing device, which is implemented by the following technical solution.

[0006] A transverse sealing device includes a frame, an upper heat sealing part and a lower heat sealing part arranged on the frame, the upper heat sealing part and the lower heat sealing part can collide with each other, and the movement trajectories of the upper heat sealing part and the lower heat sealing part are both "D" shaped.

[0007] By adopting the above technical solution, the upper and lower heat sealers both follow a linear "D"-shaped trajectory when in contact. During transverse sealing, the upper and lower heat sealers move along with the bag by a certain distance, ensuring a sufficient heat seal during transverse sealing and guaranteeing a high-quality and effective transverse seal. The upper and lower swing arms follow a circular trajectory and are in continuous motion. At a certain point along the downward motion of the circular trajectory, the upper and lower heat sealers begin to contact the bag for heat sealing. From this point on, the upper and lower heat sealers maintain contact with the bag until the trajectory reaches a corresponding horizontal point. At this point, the upper and lower heat sealers separate and move upward and downward, respectively, with a gap between them to allow the next bag to move horizontally. The circular trajectory reaches its highest point, at which point the upper and lower heat sealers begin to move toward each other until they once again contact the bag, completing the heat seal and achieving a transverse seal. During the entire process, there is practical significance at each point of the circular trajectory, and the upper swing arm and the lower swing arm do not stop moving, which speeds up the reset time of the upper heat sealing part and the lower heat sealing part.

[0008] Preferably, an upper swing arm and a lower swing arm are symmetrically arranged on the frame, the upper heat sealing part is connected to the upper swing arm through a telescopic device, and the lower heat sealing part is connected to the lower swing arm through a telescopic device, and the upper swing arm and the lower swing arm both perform circular motion.

[0009] By adopting the above technical solution, the upper swing arm and the lower swing arm both make circular motions, the contact time of the upper heat sealing part and the lower heat sealing part is extended, the upper swing arm and the lower swing arm continue to move, the heat sealing time of the next cycle is not delayed, and the reset time of the upper heat sealing part and the lower heat sealing part is accelerated.

[0010] Preferably, the retractable device comprises a position adjusting portion and an abutting platform, the position adjusting portion and the abutting platform are slidably connected, and a compression spring is provided between the position adjusting portion and the abutting platform.

[0011] By adopting the above technical solution, the upper swing arm and the lower swing arm are kept in continuous motion through the action of the compression spring, so that the upper heat sealing part and the lower heat sealing part can contact and move as a whole in the horizontal direction, thereby increasing the heat sealing time and ensuring sufficient heat sealing.

[0012] Preferably, the upper heat-sealing portion or the lower heat-sealing portion is provided with a knife groove along the heat-sealing contact surface, and a cutting knife is provided in the knife groove.

[0013] By adopting the above technical solution, the packaging can be cut after heat sealing, which has the advantages of accurate positioning, convenient cutting, and the purpose of horizontally sealing the product.

[0014] Preferably, a knife guide block is fixed on the frame, a knife shaft is provided on the lower adjustment block, the cutting knife is connected to a knife support rod, the other end of the knife support rod is hinged to the knife shaft, and the knife shaft abuts against the knife guide block.

[0015] By adopting the above technical solution, the upper heat sealing part and the lower heat sealing part will not cut the packaging bag when they just come into contact with it. Only when the compression spring continues to move will the knife shaft rotate, causing the cutter to move relative to the lower heat sealing part, and then cut the package. This ensures that cutting occurs when the heat sealing is sufficient or completed, rather than cutting when the upper heat sealing part or the lower heat sealing part just comes into contact with the packaging bag, so as to avoid cutting the package before it is horizontally sealed and causing leakage.

[0016] Preferably, four side frames are hinged on the frame, and two opposite sides of the four side frames remain parallel. The upper heat-sealing part and the lower heat-sealing part are both provided with rolling parts, and the rolling part of the upper heat-sealing part abuts against one side of the four side frames, and the rolling part of the lower heat-sealing part abuts against the opposite side of the four side frames.

[0017] By adopting the above technical solution, the four sides ensure that the upper heat sealing part and the lower heat sealing part are completely symmetrical, and that the bottom surface of the upper heat sealing part and the top surface of the lower heat sealing part are completely parallel, thereby ensuring the quality of the heat sealing.

[0018] Preferably, one side of the four side frames that is not in contact with the upper heat sealing part and the lower heat sealing part is fixedly connected to a four-side rotating block, the four-side rotating block is rotatably connected to the frame, and a return spring is provided at the other end of the four-side rotating block.

[0019] By adopting the above technical solution, the four sides can achieve stable and repeated movements to ensure the heat sealing quality.

[0020] On the other hand, the present application provides a transverse sealing packaging machine, which is implemented through the following technical solution.

[0021] A transverse sealing packaging machine includes a transverse sealing device and a conveying device. The transverse sealing device is provided with a screw linked to a heat sealing part. The conveying device is provided with a movable platform. The screw is hinged to the movable platform. A belt is wound around the movable platform. The belt is supported by multiple belt rollers. The position of the belt rollers can change with the change of the position of the movable platform.

[0022] By adopting this technical solution, the horizontal position of the heat seal unit is variable. The use of a mobile platform ensures that the mobile platform and the heat seal unit are synchronized. Heat-sealed packages fall onto the belt on the mobile platform for transport. Without a mobile platform, smaller packages may fall between the transverse sealing device and the conveyor after heat sealing, failing to land on the belt and potentially causing package swapping.

[0023] Preferably, the conveying device includes a conveying frame, and two corresponding side walls of the conveying frame are respectively provided with transverse grooves, and a position shifting roller is provided between the two transverse grooves, and the axial end of the position shifting roller can be inserted into the transverse groove.

[0024] By adopting the above technical solution, when a mobile platform is used, it is still possible to ensure that the belt is tensioned and can be transmitted, and by changing the positional relationship between the various belt rollers, continuous and stable transmission can be achieved.

[0025] Preferably, the conveying frame is provided with a bearing seat with a non-circular outer contour, and the transverse groove is arranged within the movement trajectory of the bearing seat.

[0026] By adopting this technical solution, the bearing seat adjusts the position of the shift roller within the transverse groove, achieving automatic shifting, thereby synchronizing the moving platform and the shift roller. The shift roller moves the same distance within the transverse groove as the moving platform moves relative to the conveyor frame, ensuring automatic dynamic tensioning of the belt.

[0027] In summary, the present application includes at least one of the following beneficial technical effects.

[0028] 1. When sealing horizontally, the upper and lower heat sealing parts will move together with the packaging bag for a certain distance, ensuring sufficient heat sealing during horizontal sealing and ensuring the quality and excellent effect of horizontal sealing.

[0029] 2. When the upper heat sealing part and the lower heat sealing part are put together for heat sealing, the upper swing arm and the lower swing arm do not stop moving, but continue to move to prepare for the next heat sealing, without delaying the next heat sealing time, speeding up the time for the upper heat sealing part and the lower heat sealing part to reset, and greatly improving the heat sealing efficiency of the horizontal seal.

[0030] 3. It eliminates the impact and noise of traditional cam transmission, and does not require the maintenance of the stability of the cam structure and the overall structure. The transverse sealing packaging efficiency of the traditional cam transmission is 150 times / minute, while the packaging efficiency of this application can reach 300 times / minute, and may be even higher.

[0031] 4. The structure of the upper swing arm and the lower swing arm realizes a cantilever structure. There is no need to enclose the entire equipment in a cam structure like a cam transmission structure. The transmission device of the device of the present application is visualized, which is convenient for maintenance and repair.

[0032] 5. In order to adapt to the horizontal movement of the heat sealing part of the horizontal sealing device, a conveying device is designed to match the horizontal sealing device. By changing the position of the conveyor belt roller and the position of the mobile platform, the belt is always in a tensioned state, effectively completing the transportation of the packaged materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a schematic diagram of the overall structure of the transverse sealing device and the output device of this application.

[0034] Figure 2 This is a structural diagram of the transverse sealing device of the present application, highlighting the gear transmission.

[0035] Figure 3 It is a partial structural diagram of the transverse sealing device of the present application.

[0036] Figure 4 It is a schematic diagram of the main transmission structure of this application.

[0037] Figure 5 It is a partial exploded view highlighting the internal structure of the adjustment part.

[0038] Figure 6 This is a structural diagram of the main moving parts during heat sealing in this application.

[0039] Figure 7 It is a structural diagram of the cutting knife and its moving parts of the present application.

[0040] Figure 8 It is an overall exploded view of the transverse sealing device and conveying device of this application.

[0041] Figure 9 This is a structural diagram of the conveyor device with one outer plate of the conveyor device removed to highlight the internal belt and belt rollers of the conveyor device.

[0042] Description of reference numerals:

[0043] 1. Horizontal seal motor; 21. First upper gear; 211. Upper gear shaft; 212. Upper bearing seat; 221. Second upper gear shaft; 222. Second upper gear; 231. Lower gear shaft; 23. First lower gear; 232. Lower bearing seat; 24. Second lower gear; 241. Second lower gear shaft; 242, lower second bearing seat; 25, linkage gear; 251, linkage wheel bearing seat; 252, linkage eccentric block; 253, lead screw; 254, synchronization block; 254, linkage wheel shaft; 26, reversing gear; 261, reversing wheel shaft; 262, reversing wheel bearing seat; 27, output wheel bearing seat; 28, first fixing rod; 29, second fixing rod; 3, frame; 31, support plate; 32, alignment plate; 33, fixed connecting rod; 34, reset positioning piece; 35, reset spring; 36, leveling shaft; 361, rotating block; 362, leveling bearing seat; 363, spring rotating block; 371. Fixed hinge seat; 372. Four-side rotating block; 373. Rocker; 374. Four-side frame; 38. Knife guide block; 41. Upper swing arm; 411. Swing arm eccentric block; 412. Rotating shaft seat; 413. Upper pressure plate; 414. Pressure plate guide rod; 415. End shaft; 42. Lower swing arm; 43. Upper heat seal portion; 431. Knife groove; 44. Lower heat seal portion; 45. Upper platform; 451. Platform guide rod; 452. Spring locator; 453. Compression spring; 454. Platform bearing; 46. Lower platform; 47. Upper adjustment portion; 471 , through hole; 472, triangular protrusion; 473, adjustment mounting hole; 474, positioning hole; 48, lower adjustment part; 491, knife support rod; 492, support rod rotating block; 493, rotating shaft block; 494, knife rotating shaft; 495, cutting knife; 496, knife moving bearing; 5, conveying device; 51, moving platform; 511, slider; 52, fixed platform; 53, transport frame; 54, slide rail; 55, belt roller; 551, shifting roller; 56, output motor; 561, chain; 57, seat bearing; 58, horizontal groove; 59, conveyor belt. DETAILED DESCRIPTION

[0044] The present application is further described in detail below in conjunction with all the drawings and specific embodiments.

[0045] This embodiment is a non-cam driven transverse sealing packaging machine.

[0046] Reference Figure 1 The packaging machine mainly includes two parts: a transverse sealing device and a conveying device 5. The supporting structure of the transverse sealing device is a frame 3. The frame 3 includes a support plate 31, an alignment plate 32 arranged on one side of the support plate 31, and a fixed connecting rod 33 connecting the support plate 31 and the alignment plate 32. A transverse sealing motor 1 is fixed on the side of the support plate 31 away from the alignment plate 32. The transverse sealing motor 1 transmits power to the screw 253 on the side of the support plate 31 close to the alignment plate 32.

[0047] The conveying device 5 is provided with a moving platform 51, and a synchronous block 254 is provided on one side of the moving platform 51 close to the lead screw 253. The synchronous block 254 is connected to the lead screw 253 through a bearing. The conveying device 5 drives the conveying belt 59 to convey the packaged products through the power of the output motor 56.

[0048] Reference Figure 2 and Figure 3 The output shaft of the horizontal seal motor 1 is fixed with an output gear, located on the side of the support plate 31 near the horizontal seal motor 1. The output gear's shaft passes through the output wheel bearing seat 27, which is fixed to the side of the support plate 31 near the alignment plate 32. The output gear meshes with the first upper gear 21, the second upper gear 22, and the reversing gear 26 respectively; the reversing gear meshes with the first lower gear 23, the second lower gear 24, and the linkage gear 25 respectively. The lines connecting the centers of the first upper gear 21, the second upper gear 22, the second lower gear 24, and the first lower gear 23 form a rectangle.

[0049] An upper gear shaft 211 is fixedly connected to the center of the first upper gear 21 . The upper gear shaft 211 passes through the support plate 31 and is connected to the upper bearing seat 212 . The upper bearing seat 212 is fixed to the side of the support plate 31 away from the horizontal sealing motor 1 .

[0050] The center of the second upper gear 22 is fixedly connected with the upper second gear shaft 221 , and the upper second gear shaft 221 passes through the support plate 31 and is connected to the upper second bearing seat 222 . The upper second bearing seat 222 is fixed on the side of the support plate 31 away from the horizontal sealing motor 1 .

[0051] A next gear shaft 231 is fixedly connected to the center of the first lower gear 23 . The next gear shaft 231 passes through the support plate 31 and is connected to the next bearing seat 232 . The next bearing seat 232 is fixed to the side of the support plate 31 away from the horizontal sealing motor 1 .

[0052] A lower second gear shaft 241 is fixedly connected to the center of the second lower gear 24 . The lower second gear shaft 241 passes through the support plate 31 and is connected to the lower second bearing seat 242 . The lower second bearing seat 242 is fixed to the side of the support plate 31 away from the horizontal sealing motor 1 .

[0053] The upper bearing seat 212 and the lower bearing seat 232 are fixedly connected by a first fixing rod 28 , and the upper second bearing seat 222 and the lower second bearing seat 242 are fixedly connected by a second fixing rod 29 .

[0054] A reversing wheel shaft 261 is fixedly connected to the center of the reversing gear 26 . The reversing wheel shaft 261 passes through the support plate 31 and is connected to the reversing wheel bearing seat 262 . The reversing wheel bearing seat 262 is fixed on the side of the support plate 31 away from the horizontal seal motor 1 .

[0055] A linkage axle 254 is fixedly connected to the center of the linkage gear 25. The linkage axle 254 passes through the support plate 31 and is connected to the linkage wheel bearing seat 251. The linkage wheel bearing seat 251 is fixed on the side of the support plate 31 away from the horizontal sealing motor 1. The side of the linkage axle 254 away from the horizontal sealing motor 1 is connected to the linkage eccentric block 252. The linkage eccentric block 252 is hinged with a screw 253.

[0056] Reference Figure 3 and Figure 4 One end of the upper gear shaft 211 is connected to the first upper gear 21, and the other end is connected to the shaft seat 412. The other end of the shaft seat 412 is connected to the swing arm eccentric weight 411. A triangular protrusion 472 is provided on the end surface of the shaft seat 412 near the swing arm eccentric weight 411. A triangular groove is provided on the swing arm eccentric weight 411 at a position corresponding to the triangular protrusion 472 on the shaft seat 412. An end shaft 415 is provided on the swing arm eccentric weight 411 away from the shaft seat 412.

[0057] The structures of the upper two gear shafts 221, the lower gear shaft 231 and the lower two gear shafts 241 are the same as the structure of the upper gear shaft 211 (such as Figure 4 The upper swing arm 41 is similar to the upper swing arm 41 and the lower swing arm 42. The upper swing arm 41 is provided with two holes, one of which is provided with an end shaft 415 extending from the upper bearing seat 212, and the other is provided with an end shaft 415 extending from the upper second bearing seat 222. Similarly, the lower swing arm 42 is provided with two holes, one of which is provided with an end shaft 415 extending from the lower bearing seat 232, and the other is provided with an end shaft 415 extending from the lower second bearing seat 242. The upper swing arm 41 and the lower swing arm 42 are arranged parallel and symmetrically. The line connecting the end positions of the two end shafts 415 in the upper swing arm 41 is parallel to the line connecting the end positions of the upper gear shaft 211 and the upper second gear shaft 221. The line connecting the end positions of the two end shafts 415 in the lower swing arm 42 is parallel to the line connecting the end positions of the lower gear shaft 231 and the lower second gear shaft 241.

[0058] Reference Figure 3 and Figure 5The upper swing arm 41 is connected to an upper adjustment portion 47 at the end away from the linkage bearing seat. The upper adjustment portion 47 has a triangular protrusion 472 on its surface in contact with the upper swing arm 41. A triangular groove of a corresponding shape is located at a position corresponding to the triangular protrusion 472 on the upper swing arm 41. The upper adjustment portion 47 is connected to the upper swing arm 41 via an adjustment mounting hole 473. A through-hole 471 is provided in the upper adjustment portion 47. An upper abutment platform 45 is provided at its lower portion. A platform guide rod 451 is fixed to its upper surface, corresponding to the through-hole 471. The platform guide rod 451 has a threaded hole on its upper surface. During installation, a long-stem bolt (not shown) is threadedly connected to the platform guide rod 451 through the through-hole 471. In its natural state, the upper abutment platform 45 naturally droops until the bolt cap of the long-stem bolt connected to the platform guide rod 451 engages the upper portion of the through-hole 471 in the upper adjustment portion 47. Therefore, the relative positional relationship between the upper abutment platform 45 and the upper adjustment portion 47 can be changed.

[0059] A spring locator 452 is fixed to the upper surface of the upper abutment platform 45. A spring is mounted on the spring locator 452. A locating hole 474 is provided at a position corresponding to the upper adjustment portion 47 and the spring locator 452. When the upper abutment platform 45 and the upper adjustment portion 47 are moved from close to far, the spring provides a stable return and guidance function.

[0060] A platform bearing 454 is provided at each end of the upper platform 45 . The two platform bearings 454 are coaxially arranged, and their axial directions are perpendicular to the axial direction of the platform guide rod 451 .

[0061] Reference Figure 3 The lower surface of the upper abutment platform 45 is provided with an upper heat-sealing portion 43. A pressure plate guide rod 414 is provided on the lower surface of the upper swing arm 41. An upper pressure plate 413 is fixedly mounted below the pressure plate guide rod 414. The distance between the upper pressure plate 413 and the lower surface of the upper swing arm 41 is adjustable. When the upper adjustment portion 47 is closest to the upper abutment platform 45, the lower surface of the upper pressure plate 413 can be flush with the lower surface of the upper heat-sealing portion 43. This allows the upper pressure plate 413 to press against the upper portion of the bag during transverse heat sealing, expelling excess air and preventing the bag from bulging or breaking during heat sealing.

[0062] The upper and lower parts of the main components of the transverse sealing device are symmetrically arranged. Similarly:

[0063] Reference Figure 3-Figure 5The lower adjustment portion 48 is connected to the end of the lower swing arm 42 away from the linkage bearing seat. The surface of the lower adjustment portion 48 that contacts the lower swing arm 42 is provided with a triangular protrusion 472. A triangular groove of a corresponding shape is provided at a position corresponding to the triangular protrusion 472 of the lower swing arm 42. The lower adjustment portion 48 is connected to the lower swing arm 42 via an adjustment mounting hole 473. A through-hole 471 is provided in the lower adjustment portion 48. A lower abutment platform 46 is provided on its upper portion. A platform guide rod 451 is fixed to the lower surface of the lower abutment platform 46 at a position corresponding to the through-hole 471. The lower surface of the platform guide rod 451 has a threaded hole. During installation, a long-rod bolt (not shown) is threadedly connected to the platform guide rod 451 through the through-hole 471. The lower abutment platform 46 can slide relative to the lower adjustment portion 48 via the platform guide rod 451, allowing the relative position of the lower abutment platform 46 and the lower adjustment portion 48 to be changed.

[0064] A spring locator 452 is also fixed to the lower surface of the lower support platform 46. A spring is mounted on the spring locator 452. Positioning holes 474 are provided at locations corresponding to the lower adjustment portion 48 and the spring locator 452. In its natural state, the lower support platform 46 is supported by the spring. When a force is applied to the upper surface of the lower support platform 46, the lower support platform 46 continues to move toward the lower adjustment portion 48. When the force is no longer applied to the upper surface of the lower support platform 46, the spring forces the lower support platform 46 back to its original position. The spring provides stable support, reset, and guidance.

[0065] A platform bearing 454 is provided at each end of the lower platform 46 . The two platform bearings 454 are coaxially arranged, and their axial directions are perpendicular to the axial direction of the platform guide rod 451 .

[0066] A lower heat sealing portion 44 is provided on the upper surface of the lower abutment platform 46 .

[0067] Reference Figure 6 On the frame 3, a set of fixed hinges 371 are provided at each end of the upper platform 45. The fixed hinges 371 include two horizontal cross pieces, both of which are fixed to the frame 3. Each cross piece has a through hole 471 at each end, and the two cross pieces are connected by a shaft. Each set of fixed hinges 371 has two shafts. The shaft ends are fixedly connected to the four frames 374. The two sets of fixed hinges 371 are symmetrically arranged.

[0068] The four-sided frame 374 is composed of a top, a bottom, and two oblique sides. The top and bottom sides are of equal length, and the two oblique sides are of equal length. The top, one oblique side, the bottom, and the other oblique side are connected end to end, and the connections are all hinged. The shaft ends are fixedly connected to the oblique sides of the four-sided frame 374 at the midpoint of the oblique sides. In a set of fixed hinges 371, one shaft end is fixedly connected to one oblique side, and the other shaft end is fixedly connected to the other oblique side. The two sets of four-sided frames 374 are arranged symmetrically.

[0069] A four-sided rotating block 372 is fixed to an axis between the two transverse plates, and the other end of the four-sided rotating block 372 is hinged to a rocker rod 373. The other end of the rocker rod 373 is hinged to one end of the rotating block 361. The rotating block 361 is fixed on the leveling rotating shaft 36, and the leveling rotating shaft 36 is fixed to the frame 3 through the leveling bearing seat 362.

[0070] By fixing the hinge seat 371 and the limiting function of the four frames 374, the positions of the upper heat sealing part 43 and the lower heat sealing part 44 can be ensured to be completely symmetrical, and the positions of the upper support platform 45 and the lower support platform 46 and their related devices will not be completely symmetrical due to the gravity of the upper support platform 45 and the lower support platform 46.

[0071] Reference Figure 2 and Figure 6 A reset locating piece 34 is fixedly provided at the lower portion of the support plate 31 on the side close to the horizontal sealing motor 1. A leveling shaft 36 passes through the support plate 31 and the alignment plate 32. A spring block 363 is fixedly provided at one end of the leveling shaft 36 passing through the support plate 31. The end of the spring block 363 is fixedly connected to one end of a reset spring 35, and the other end of the reset spring 35 is fixedly connected to the reset locating piece 34.

[0072] During operation, the platform bearing 454 of the upper abutting platform 45 abuts the upper surface of the four-sided frame 374, while the platform bearing 454 of the lower abutting platform 46 abuts the lower surface of the four-sided frame 374. When the upper abutting platform 45 and the lower abutting platform 46 approach each other, the platform bearing 454 of the upper abutting platform 45 and the platform bearing 454 of the lower abutting platform 46 work together to flatten the four-sided frame 374, causing the upper and lower edges to shift horizontally and the two oblique edges to deflect, thereby driving the shaft of the fixed hinge 371 to rotate. This in turn causes the four-sided rotating block 372 fixed to the shaft to rotate, driving the swing arm 373 to swing, and ultimately rotating the leveling shaft 36, causing the return spring 35 to deform. When the relative positions of the upper abutting platform 45 and the lower abutting platform 46 change, the position of the four-sided frame 374 is returned to its original position by the return spring 35, awaiting the next coordinated movement.

[0073] This structure is designed to enable the upper platform 45 and the lower platform 46 to be completely parallel, so that the upper heat sealing part 43 connected to the upper platform 45 and the lower heat sealing part 44 connected to the lower platform 46 can be tightly heat-sealed, ensuring that the two ends of the heat-sealed part of the packaged product will not cause the tightness of the heat sealing of the packaging bag due to the position offset of the heat sealing part.

[0074] Reference Figure 7 The lower surface of the upper heat-sealing portion 43 and the upper surface of the lower heat-sealing portion 44 are both provided with knife grooves 431, and the positions of the knife grooves 431 correspond to each other. A cutting knife 495 is disposed within the knife groove 431 of the lower heat-sealing portion 44. Both ends of the cutting knife 495 extend out of the lower heat-sealing portion 44. The end of the cutting knife 495 is connected to a knife support rod 491, and the other end of the knife support rod 491 extends downward through the lower support platform 46.

[0075] A small support is fixed to the side of the lower adjustment portion 48 away from the linkage bearing seat. This small support is rotatably connected to a knife shaft 494, with both ends of the knife shaft 494 extending beyond the lower adjustment portion 48. The knife shaft 494 is fixedly connected to one end of a support rod rotating block 492 at a position corresponding to the position where it extends beyond the lower adjustment portion 48. The other end of the support rod rotating block 492 is hingedly connected to the other end of the knife support rod 491. The knife shaft 494 extends further toward the side of the support plate 31 and is fixedly connected to a rotating shaft block 493. The other end of the rotating shaft block 493 is provided with a knife-moving bearing 496. A knife guide block 38 is fixed to the inner wall of the support plate 31 on the side near the alignment plate 32. The knife guide block 38 has an inclined surface that abuts the knife-moving bearing 496.

[0076] During operation, the lower adjusting portion 48 moves up and down, driving the knife shaft 494 to move up and down, and then the knife bearing 496 moves along the inclined surface of the knife guide block 38, so that the knife shaft 494 moves up and down while also rotating along its own axis. The rotating knife shaft 494 drives the support rod rotating block 492 to rotate around the knife shaft 494 as the axis, so that the knife support rod 491 moves up and down relative to the lower adjusting portion 48, realizing the reciprocating movement of the cutting knife 495 in the knife groove 431 of the upper heat sealing portion 43 and the knife groove 431 of the lower heat sealing portion 44, thereby realizing the cutting of the heat-sealed part of the packaging bag.

[0077] Reference Figure 8 The conveyor device 5 uses a conveyor motor to drive a conveyor belt 59 to rotate, achieving the transportation and delivery of transversely sealed packages. The conveyor belt 59 is passed over multiple belt rollers 55 on the transport frame 53 (such as the belt roller 55 at the end of the mobile platform 51 away from the fixed platform 52, the belt roller 55 at the end of the fixed platform 52 away from the mobile platform 51, the belt roller 55 for the transmission mechanism input, and the belt roller 55 for supporting and reversing the conveyor belt 59), enveloping both the fixed platform 52 and the mobile platform 51. The fixed platform 52 is fixed to the transport frame 53. A slider 511 is fixed to the lower portion of the mobile platform 51. The slider 511 is slidably connected to a slide rail 54. The slide rail 54 extends to the end of the fixed platform 52. The mobile platform 51 slides on the slide rail 54 to engage with the fixed platform 52. A synchronization block 254 is provided on one side of the mobile platform 51 close to the support plate 31 . The synchronization block 254 is connected to the lead screw 253 via a bearing so that the lead screw 253 and the synchronization block 254 are synchronized in the transport direction of the conveyor belt 59 on the mobile platform 51 .

[0078] Reference Figure 8 and Figure 9The conveyor frame is equipped with a large belt roller 55, which is mounted on the frame 3 via a seat bearing 57. The outer contour of the seat bearing 57 is not circular, but rather diamond-shaped. A small sprocket is also fixed to the end of the seat bearing 57. A large sprocket is fixed to the output end of the conveyor motor. The conveyor motor drives the large sprocket to rotate, and then transmits power to the small sprocket via a chain 561. The rotation of the small sprocket causes the seat bearing 57 to rotate. The protruding portion of the seat bearing 57 performs a circular motion on the vertical plane. A transverse groove 58 is provided within the circumferential trajectory of the conveyor frame, and another transverse groove 58 is provided at a position on the conveyor frame corresponding to the transverse groove 58. The two ends of the shaft of the other belt roller 55 extend out, and the protruding ends are respectively inserted into the two transverse grooves 58, allowing the belt roller 55 to roll along the transverse groove 58 as a trajectory.

[0079] When the mobile platform 51 reciprocates with the lead screw 253, the distance from one side of the mobile platform 51 to the side of the fixed platform 52 will change. The conveying motor drives the seat bearing 57 to rotate, thereby adjusting the position of the belt roller 55 in real time, so that the conveyor belt 59 wrapped on all the belt rollers 55 can always remain in a tensioned state, and can also pass through the mobile platform 51 with the help of the cutter 495 after the transverse sealing device cuts, so that the transversely sealed package will not fall off the conveyor belt due to changes in the position of the heat-sealed part.

[0080] The operating principle of this embodiment is that the upper swing arm 41 and the lower swing arm 42 are symmetrically arranged. When the upper swing arm 41 is at the lowest position of its motion trajectory, the lower swing arm 42 is at its highest position. At this time, the distance between the upper swing arm 41 and the lower swing arm 42 is L. When the upper swing arm 41 is at its highest position of its motion trajectory, the lower swing arm 42 is at its lowest position of its motion trajectory. At this time, the distance from the upper swing arm 41 to the lower surface of the upper heat-sealing portion 43 is L1, and the distance from the lower swing arm 42 to the upper surface of the lower heat-sealing portion 44 is L2. L1 + L2 > L, so the motion trajectories of the upper heat-sealing portion 43 and the lower heat-sealing portion 44 are both straight "D"-shaped trajectories when in contact. During horizontal sealing, the upper heat-sealing portion 43 and the lower heat-sealing portion 44 move along with the packaging bag by a certain distance, ensuring sufficient heat sealing during horizontal sealing and guaranteeing the quality and excellent effect of the horizontal sealing.

[0081] When the compression spring 453 is compressed to its maximum deformation, the upper swing arm 41 is closest to the upper abutment platform 45, and the lower swing arm 42 is closest to the lower abutment platform 46. The distance between the upper swing arm 41 and the lower surface of the upper heat-sealing portion 43 is L1', and the distance between the lower swing arm 42 and the lower heat-sealing portion 44 is L2', where L ≥ L1' + L2'. This ensures that the upper and lower swing arms 41 and 42 will not get stuck and can continue to perform circular motion.

[0082] The upper and lower arms 41 and 42 both follow circular motion paths. They are in continuous motion. At a certain point in the downward motion of the circular motion path, the upper and lower heat seals 43 and 44 begin to contact the packaging bag for heat sealing. Following this point, the upper and lower heat seals 43 and 44 maintain contact with the packaging bag on the circular motion path until the motion path reaches a corresponding point in the horizontal direction. At this point, the upper and lower heat seals 43 and 44 separate and move up and down, respectively, with a gap between them, allowing the next packaging bag to move horizontally. The circular motion path reaches its highest point, at which point the upper and lower heat seals 43 and 44 begin to move toward each other until they once again contact the packaging bag, completing the heat seal and achieving a horizontal seal. Throughout the entire process, every point in the circular motion path has practical significance. Neither the upper and lower arms 41 and 42 stop moving, accelerating the reset time of the upper and lower heat seals 43 and 44.

[0083] On the other hand, when the upper heat seal portion 43 and the lower heat seal portion 44 are brought together for heat sealing, the upper and lower swing arms 41 and 42 do not stop moving, but instead return to prepare for the next heat seal. This does not delay the next heat seal and accelerates the reset time of the upper and lower heat seal portions 43 and 44, thus greatly improving the efficiency of transverse sealing. There is no impact like in cam transmission, and there is no need to maintain the stability and noise of the cam structure and the overall structure. Traditional cam transmission transverse sealing packaging efficiency is 150 times / minute, but the packaging efficiency of this application has reached 300 times / minute, and may be even higher.

[0084] In addition, the structure of the upper swing arm 41 and the lower swing arm 42 realizes a cantilever structure, and there is no need to wrap the entire set of equipment in a cam structure like a cam transmission structure. The transmission device of the device of the present application is visualized, which is convenient for maintenance and repair.

[0085] Furthermore, in order to adapt to the horizontal movement of the heat sealing part of the transverse sealing device, a conveying device 5 is designed to match the transverse sealing device. By changing the position of the shifting roller 551 and the position of the movable platform 51, the conveying belt 59 is ensured to be in a tensioned state at all times, thereby effectively completing the transportation of the packaged materials.

[0086] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A transverse sealing device, characterized in that: The invention comprises a frame (3), an upper heat sealing portion (43) and a lower heat sealing portion (44) arranged on the frame (3); the upper heat sealing portion (43) and the lower heat sealing portion (44) can collide with each other, and the movement trajectories of the upper heat sealing portion (43) and the lower heat sealing portion (44) are both "D"-shaped; An upper swing arm (41) and a lower swing arm (42) are symmetrically arranged on the frame (3); the upper heat sealing portion (43) is connected to the upper swing arm (41) through a telescopic device; the lower heat sealing portion (44) is connected to the lower swing arm (42) through a telescopic device; and both the upper swing arm (41) and the lower swing arm (42) perform circular motion; The retractable device comprises a position adjusting portion and an abutting platform, the position adjusting portion and the abutting platform are slidably connected, and a compression spring (453) is provided between the position adjusting portion and the abutting platform; An upper gear shaft (211), an upper second gear shaft (221), a lower gear shaft (231) and a lower second gear shaft (241) are rotatably connected to the frame (3); the upper swing arm (41) is provided with two holes, one of which is rotatably connected to the upper gear shaft (211) and the other is rotatably connected to the upper second gear shaft (221); the lower swing arm (42) is provided with two holes, one of which is rotatably connected to the lower gear shaft (231) and the other is rotatably connected to the lower second gear shaft (241); The upper heat sealing portion (43) or the lower heat sealing portion (44) is provided with a knife groove (431) along the heat sealing contact surface, and a cutting knife (495) is provided in the knife groove (431); A knife guide block (38) is fixedly provided on the frame (3), a knife rotating shaft (494) is provided on the lower adjustment block, the cutting knife (495) is connected to the knife support rod (491), the other end of the knife support rod (491) is hinged to the knife rotating shaft (494), and the knife rotating shaft (494) is in contact with the knife guide block (38); Four side frames (374) are hinged on the frame (3), and two sides of the four side frames (374) are kept parallel to each other. The upper heat sealing portion (43) and the lower heat sealing portion (44) are both provided with rolling elements. The rolling element of the upper heat sealing portion (43) abuts against one side of the four side frames (374), and the rolling element of the lower heat sealing portion (44) abuts against the opposite side of the four side frames (374). The side of the four-side frame (374) that is not in contact with the upper heat-sealing part (43) and the lower heat-sealing part (44) is fixedly connected to the four-side rotating block (372). The four-side rotating block (372) is rotatably connected to the frame (3). The other end of the four-side rotating block (372) is provided with a return spring (35).

2. A transverse sealing device according to claim 1, characterized in that: The telescopic device comprises a position adjusting portion and an abutting platform, the position adjusting portion and the abutting platform are slidably connected, and a compression spring (453) is provided between the position adjusting portion and the abutting platform.

3. A transverse sealing packaging machine comprising a conveying device (5) and a transverse sealing device according to any one of claims 1 to 2, characterized in that: The transverse sealing device is provided with a screw (253) linked to the heat sealing part, the conveying device (5) is provided with a movable platform (51), the screw (253) is hinged to the movable platform (51), a belt is wound around the movable platform (51), the belt is supported by a plurality of belt rollers (55), and the position of the belt rollers (55) can be changed as the position of the movable platform (51) changes.

4. The transverse sealing packaging machine according to claim 3, characterized in that: The conveying device (5) includes a conveying frame, and two corresponding side walls of the conveying frame are respectively provided with transverse grooves (58). A shifting roller (551) is provided between the two transverse grooves (58), and the axial end of the shifting roller (551) can be inserted into the transverse groove (58).

5. The transverse sealing packaging machine according to claim 4, characterized in that: The conveying frame is provided with a bearing seat with a non-circular outer contour, and the transverse groove (58) is arranged in the motion track of the bearing seat.

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