Transverse sealing device and packaging machine

Abstract

The utility model relates to a horizontal sealing device and a packaging machine, which comprise an upper sealing device and a lower sealing device, two ends of the upper sealing device and two ends of the lower sealing device are respectively provided with a driving transmission mechanism, and two ends of the upper sealing device and two ends of the lower sealing device are respectively provided with a group of synchronizing mechanisms. The synchronizing mechanism drives the feeding conveying mechanism and the discharging conveying mechanism to transversely reciprocate back and forth along with the upper sealing device and the lower sealing device while running, the synchronizing mechanism comprises a guide rod, a sleeve and a connecting seat, the connecting seat is connected with the feeding conveying mechanism and the discharging conveying mechanism, the sleeve is fixed to the connecting seat, and the guide rod is connected with the sleeve. The bottom end of the guide rod is fixedly connected with the lower sealing device, the guide rod upwards penetrates through the sleeve and the upper sealing device, and the guide rod is connected with the driving transmission mechanism and can slide relative to the sleeve and the upper sealing device. The transverse sealing device is reasonable in structural design, packaging quality and sealing effect can be guaranteed, packaging efficiency is greatly improved, the overall size of the transverse sealing device is reduced, and the occupied space of the transverse sealing device is reduced.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment technology, and in particular to a horizontal sealing device and a packaging machine. Background Technology

[0002] Pillow packaging machines are automatic packaging equipment that wrap products in film into a "pillow shape." They are suitable for high-speed packaging of regular-shaped items such as daily chemical products, food, and pharmaceuticals. Core functions include feeding, film wrapping, and heat sealing and cutting via a sealing device. The sealing device is a machine that seals the packaging film filled with the packaged goods. After sealing, the product is preserved in an airtight container, maintaining product quality and preventing air leakage. It is widely used in the packaging of daily chemical products, food, and pharmaceuticals.

[0003] Currently, there are two main types of sealing devices for pillow packaging machines: longitudinal sealing devices and transverse sealing devices. In existing technology, transverse sealing devices generally use a pair of upper and lower sealing devices for heating and cutting at the same time as sealing.

[0004] Patent No. 201910961128.7 discloses a sealing device, including an upper sealer and a lower sealer. The upper sealer is fixed to an upper horizontal arm, and the lower sealer is fixed to a lower horizontal arm. Both the upper and lower horizontal arms include a parallelogram double-crank mechanism composed of two cranks and a parallel connecting rod. The driving device includes four drive shafts connected to the four cranks and two meshing transmission gears. One of the drive shafts is connected to a drive motor as the active shaft. The two drive shafts of the upper horizontal arm are linked by a synchronous belt, and the two drive shafts of the lower horizontal arm are also linked by a synchronous belt. The driving device drives the upper and lower sealers to move synchronously.

[0005] Patent No. 202121447486.5 discloses a material conveyor including an input belt and an output belt. A sealer is installed between the input and output belts. The input and output belts always rotate in the direction of travel of the packaging machine. The input and output belts are respectively mounted on input and output sliding seats, which are connected to a synchronous linkage mechanism. The synchronous linkage mechanism is connected to the sealer drive mechanism, so that the input and output belts reciprocate laterally with the sealer while rotating. The synchronous linkage mechanism of this horizontal sealing device has a relatively complex structure, which not only increases the manufacturing cost of the horizontal sealing device but also increases its size and space occupation. Utility Model Content

[0006] The main technical problem solved by this utility model is to provide a horizontal sealing device with a simple structure, which can reduce costs and reduce space occupation, and to provide a packaging machine using the horizontal sealing device.

[0007] To solve the above-mentioned technical problems, the basic concept of the first technical solution adopted by this utility model is as follows:

[0008] A horizontal sealing device includes an upper sealer and a lower sealer. Drive transmission mechanisms are installed at both ends of the upper and lower sealers. A set of synchronization mechanisms is also installed at both ends of the upper and lower sealers. The synchronization mechanisms drive a feeding conveyor and a discharging conveyor to reciprocate laterally along with the upper and lower sealers while they are in operation. The synchronization mechanism includes a guide rod, a sleeve, and a connecting seat. The connecting seat is connected to the feeding conveyor and the discharging conveyor. The sleeve is fixed to the connecting seat. The bottom end of the guide rod is fixedly connected to the lower sealer. The guide rod passes upward through the sleeve and the upper sealer. The guide rod is connected to the drive transmission mechanism and can slide relative to the sleeve and the upper sealer.

[0009] Furthermore, the drive transmission mechanism includes a drive motor, a transmission mechanism, and a drive mechanism. The drive mechanism is a double-crank motion mechanism consisting of two cranks and a drive arm. The two cranks are respectively connected to the transmission mechanism, and the upper sealer, lower sealer, and guide rod are respectively connected to the corresponding drive arm.

[0010] The connection point between the guide rod and the drive arm is located between the two cranks; or, the drive arm extends to one side, and the connection point between the guide rod and the drive arm is located on the drive arm outside the crank.

[0011] Furthermore, a knife holder is installed on the drive arm, and the knife holder is positioned above the upper sealer. One end of the knife holder has a through hole through which the guide rod passes. A cutting motion assembly is installed below the other end of the knife holder, and a cutter is installed at the bottom of the cutting motion assembly. When the knife holder moves with the drive arm, it drives the cutting motion assembly to move up and down.

[0012] Furthermore, the cutting motion assembly includes a cutting guide rod and a cutting spring. A cutting blade is installed at the bottom of the cutting guide rod, and the cutting spring is installed at the top of the cutting guide rod. A limiting rod extends laterally from the top of the cutting guide rod, and the limiting rod restricts the cutting spring between the limiting rod and the top surface of the upper sealer. When the blade holder moves with the drive arm, it drives the cutting guide rod to move.

[0013] Furthermore, sealing guide assemblies are respectively installed at both ends of the upper and lower sealing devices, and the sealing guide assemblies are installed on the drive arm between the two cranks; or, installed on the drive arm outside the cranks.

[0014] Furthermore, the sealing device guide assembly includes a sealing device guide sleeve, a sealing device compression spring, and a guide post. The sealing device guide sleeve is a cylindrical structure with one end sealed, which is fitted onto the outside of the sealing device compression spring and the guide post. One end of the guide post passes through the corresponding drive arm and is fixed to the sealing device. The sealing device compression spring is installed between the other end of the guide post and the sealing device guide sleeve.

[0015] Furthermore, the transmission mechanism includes a transmission gear set, which includes a drive gear, a first gear, and a second gear. A first intermediate gear and a second intermediate gear are disposed between the first gear and the second gear. The drive gear, the first gear, the first intermediate gear, the second intermediate gear, and the second gear mesh sequentially. The drive gear is connected to the output shaft of the drive motor. The first gear and the second gear are respectively connected to a first drive shaft and a second drive shaft. The first intermediate gear and the second intermediate gear are respectively connected to a first gear shaft and a second gear shaft. The first gear shaft and the second gear shaft are mounted on the frame through a mounting assembly. The first drive shaft and the second drive shaft are respectively connected to a first drive mechanism and a second drive mechanism.

[0016] Furthermore, there is an angle θ between the line connecting the axes of the first intermediate gear and the second intermediate gear and the line connecting the axes of the first gear and the second gear, and adjusting the angle θ eliminates gear backlash.

[0017] Furthermore, the mounting assembly includes a mounting plate with a central rotating shaft extending from its center. The central rotating shaft is rotatably connected to the frame. The mounting plate has two shaft holes, and the first gear shaft and the second gear shaft are fixedly connected to the two shaft holes respectively. The mounting plate has multiple arc-shaped mounting holes distributed on a circumference centered on the axis of the central rotating shaft. The arc-shaped mounting holes are fixedly connected to the frame by fasteners.

[0018] The basic concept of this utility model using another technical solution is:

[0019] A packaging machine, comprising the horizontal sealing device as described above.

[0020] In summary, the horizontal sealing device and packaging machine provided by this utility model have the following advantages compared with the prior art:

[0021] (1) The structure design of this utility model is more reasonable. It not only simplifies the structure of the device, but also helps to reduce the overall volume of the horizontal sealing device, reduce the space occupied by the horizontal sealing device, reduce the cost of the device, and ensure the packaging quality, ensure the sealing effect, and greatly improve the packaging efficiency.

[0022] (2) This utility model uses two sets of driving transmission mechanisms on the left and right sides to drive the lower sealer and the upper sealer to move simultaneously. This ensures that even if the sealing size of the lower sealer and the upper sealer is increased, the stability of their movement can still be guaranteed, making the horizontal sealing device suitable for packaging materials with larger dimensions.

[0023] (3) The present invention installs a first intermediate gear and a second intermediate gear between the first gear and the second gear. By adjusting the angle θ between the line connecting the axes of the first intermediate gear and the second intermediate gear and the line connecting the axes of the first gear and the second gear during installation, the backlash between the gears can be eliminated. This not only further simplifies the overall structure of the horizontal sealing device, but also makes the operation convenient and quick, and can achieve precise adjustment, ensuring the transmission accuracy and transmission performance of the gear set and meeting the transmission requirements.

[0024] (4) By installing the first intermediate gear and the second intermediate gear between the first gear and the second gear, the axial distance between the first gear and the second gear is increased accordingly, thereby increasing the relative movement distance between the upper sealer and the lower sealer. Without increasing or even decreasing the diameter of the first gear and the second gear, it can be used for packaging with taller packaging, such as five-pack instant noodle packaging bags, which can greatly reduce the space occupied by the gear set, and thus further reduce the space occupied by the horizontal sealing device.

[0025] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0026] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0027] In the attached diagram:

[0028] Figure 1 This is a schematic diagram of the horizontal sealing device structure of Embodiment 1 of this utility model (with the frame removed);

[0029] Figure 2 yes Figure 1 The main view;

[0030] Figure 3 yes Figure 2 AA section view;

[0031] Figure 4 This is a schematic diagram of the structure of the first intermediate gear, the second intermediate gear, and the mounting assembly of this utility model;

[0032] Figure 5 yes Figure 4 Side view;

[0033] Figure 6 yes Figure 1 A magnified view of part of I;

[0034] Figure 7 yes Figure 2 Partial structural cross-sectional view of section II;

[0035] Figure 8 This is a schematic diagram of the horizontal sealing device structure of Embodiment 2 of this utility model (with the frame removed).

[0036] In the picture:

[0037] Upper sealer 1, lower sealer 2, first gear 3, second gear 4, first intermediate gear 5, second intermediate gear 6, first drive shaft 7, second drive shaft 8, first drive mechanism 9, first crank 91, first drive arm 92, driven drive shaft 93, synchronous pulley 94, synchronous belt 95, second drive mechanism 10, second crank 101, second drive arm 102, driven drive shaft 103, synchronous pulley 104, synchronous belt 105, first gear shaft 11, second gear shaft 12, drive motor 13, driving gear 14, mounting assembly 15, central rotating shaft 151 152, 153, 154, 155, 156, 157, 158, 159, 16, 17, 18, 19, 20, 21, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 24, 25, 26 ...

[0038] It should be noted that the accompanying drawings and text description are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] Example 1:

[0043] like Figures 1 to 7 As shown, this embodiment provides a horizontal sealing device, including an upper sealer 1 and a lower sealer 2. The upper sealer 1 and the lower sealer 2 are mounted on a frame 16. A set of drive transmission mechanisms are respectively installed on both sides of the upper sealer 1 and the lower sealer 2. A feeding conveyor mechanism 19 and a discharging conveyor mechanism 20 are also installed on the frame 16, and the upper sealer 1 and the lower sealer 2 are installed between the feeding conveyor mechanism 19 and the discharging conveyor mechanism 20. The upper sealer 1 and the lower sealer 2 are driven by the drive transmission mechanisms to perform compound movements in the directions of approaching each other, moving away from each other, and back and forth, to realize the sealing and cutting actions of the material. The packaging film carrying the material is fed into the space between the upper sealer 1 and the lower sealer 2 by the feeding conveyor mechanism 19. After the upper sealer 1 and the lower sealer 2 complete the cutting and sealing, the material is sent out to the next station by the discharging conveyor mechanism 20. The feeding conveyor mechanism 19 and the discharging conveyor mechanism 20 each include a conveyor belt and a belt drive mechanism (not shown in the figure), so that the feeding conveyor belt and the discharging conveyor belt always run in the direction of travel of the packaging machine.

[0044] By simultaneously driving the lower sealer 2 and the upper sealer 1 through the two sets of left and right drive transmission mechanisms, it can be ensured that even if the sealing size of the lower sealer 2 and the upper sealer 1 is increased, the stability of their movement can be guaranteed, making the horizontal sealing device suitable for packaging materials with larger dimensions.

[0045] In this embodiment, a set of synchronization mechanisms 22 are installed at both ends of the upper sealer 1 and the lower sealer 2. The synchronization mechanisms 22 drive the feeding conveyor mechanism 19 and the discharging conveyor mechanism 20 to move back and forth laterally while the upper sealer 1 and the lower sealer 2 are running.

[0046] In this embodiment, the two sets of synchronization mechanisms 22 have the same structure. Each synchronization mechanism 22 includes a guide rod 221, a sleeve 222, and a connecting seat 223. The connecting seat 223 is connected to the feeding conveying mechanism 19 and the discharging conveying mechanism 20. The sleeve 222 is preferably a self-lubricating guide sleeve. The sleeve 222 is fixed on the connecting seat 223. The bottom end of the guide rod 221 is fixedly connected to the lower sealing device 2. The guide rod 221 passes upward through the sleeve 222 and the upper sealing device 1 in sequence. The guide rod 221 is connected to the drive transmission mechanism. The guide rod 221 can slide relative to the sleeve 222 and the upper sealing device 1 respectively. When the drive transmission mechanism drives the upper sealer 1 and the lower sealer 2 to move, the guide rod 221 moves synchronously. Driven by the guide rod 221, and simultaneously restricted by the sleeve 222, the connecting seat 223 moves back and forth synchronously in the lateral direction. This drives the feeding conveyor 19 and the discharging conveyor 20 to follow the upper sealer 1 and the lower sealer 2 in the lateral back and forth reciprocating motion while they are running, and the distance between the feeding conveyor 19 and the discharging conveyor 20 remains unchanged.

[0047] In this embodiment, the conveyor belts in the feeding conveyor mechanism 19 and the discharging conveyor mechanism 20 are driven by their respective belt drive mechanisms to ensure that the conveyor belts move in the same direction and at the same speed as the packaging machine. At the same time, driven by the synchronization mechanism 22, they can also follow the sealing device 2 to make reciprocating linear motion in the horizontal direction. This not only meets the sealing time requirements of the sealing device, but also ensures the smoothness of the movement of the feeding conveyor mechanism 19 and the discharging conveyor mechanism 20.

[0048] The use of this synchronization mechanism 22 makes the structural design of the horizontal sealing device more reasonable. It not only simplifies the structure of the horizontal sealing device and reduces its cost, but also ensures packaging quality, sealing effect, and greatly improves packaging efficiency.

[0049] In this embodiment, preferably, the drive transmission mechanism includes a drive motor 13, a transmission mechanism, and a drive mechanism. The drive mechanism includes a first drive mechanism 9 and a second drive mechanism 10, respectively disposed at both ends of the lower sealer 2 and the upper sealer 1. The two sets of first drive mechanisms 9 and the two sets of second drive mechanisms 10 have the same structure. The first drive mechanism 9 is a double-crank mechanism composed of two parallel first cranks 91 and a first drive arm 92. One end of each of the two first cranks 91 is rotatably connected to the first drive arm 92 via a crankshaft (not shown in the figure). Similarly, the second drive mechanism 10 is also a double-crank mechanism composed of two parallel second cranks 101 and a second drive arm 102. One end of each of the two second cranks 101 is rotatably connected to the second drive arm 102 via a crankshaft. The two ends of the upper sealer 1 are connected to the second drive arm 102 in the two sets of second drive mechanisms 10, and the two ends of the lower sealer 2 are connected to the first drive arm 92 in the two sets of first drive mechanisms 9. The first drive arm 92 moves in a circular motion with the first crank 91, and the second drive arm 102 moves in a circular motion with the second crank 101. This causes the upper sealer 1 and the lower sealer 2 to move closer to each other and further apart, as well as in a horizontal forward and backward direction. This allows the upper sealer 1 and the lower sealer 2 to move horizontally for a certain period of time while they are engaged, thereby effectively extending the contact time between the sealer and the packaging film, increasing the heating time for sealing, and improving the sealing performance of the packaging bag.

[0050] In this embodiment, the two guide rods 221 are respectively connected to the corresponding first drive arm 92 and second drive arm 102. More preferably, the connection point between the guide rods 221 and the first drive arm 92 and second drive arm 102 is located between the two first cranks 91 and the two second cranks 101. The synchronization mechanism 22 is disposed between the two cranks in the first drive mechanism 9 and the second drive mechanism 10. This ensures synchronized movement and simplifies the overall structure of the synchronization mechanism 22, thereby further reducing the overall volume of the horizontal sealing device and the space occupied by the horizontal sealing device.

[0051] In this embodiment, it is further preferred that the transmission mechanism includes a transmission gear set, which includes a driving gear 14, a first gear 3, and a second gear 4. A first intermediate gear 5 and a second intermediate gear 6 are disposed between the first gear 3 and the second gear 4. The driving gear 14, the first gear 3, the first intermediate gear 5, the second intermediate gear 6, and the second gear 4 mesh sequentially and are arranged from bottom to top. Among them, one driving gear 14 (i.e., Figure 1 The drive gear 14 located on the left is connected to the output shaft of the drive motor 13. The drive motor 13 is fixed on the frame 16. The two drive gears 14 on the left and right are connected by a transmission rod 21. The drive motor 13 drives the transmission gear sets on the left and right sides to move synchronously.

[0052] The first gear 3 and the second gear 4 are respectively connected to the first drive shaft 7 and the second drive shaft 8. The first drive shaft 7 is connected to the lower sealer 2 through the first drive mechanism 9, and the second drive shaft 8 is connected to the upper sealer 1 through the second drive mechanism 10. The first intermediate gear 5 and the second intermediate gear 6 are respectively connected to the first gear shaft 11 and the second gear shaft 12. Preferably, in this embodiment, the first intermediate gear 5 and the second intermediate gear 6 are rotatably connected to the first gear shaft 11 and the second gear shaft 12, and the first intermediate gear 5 and the second intermediate gear 6 are respectively connected to the first gear shaft 11 and the second gear shaft 12 through bearings. The first gear shaft 11 and the second gear shaft 12 are mounted on the frame 16 through a mounting assembly.

[0053] In the first drive mechanism 9, one end of a first crank 91 is connected to a first gear 3 via a first drive shaft 7, and the other end of a first crank 91 is connected to a synchronous pulley 94 via a driven drive shaft 93. The synchronous pulley 94 is connected to the first gear 3 via a synchronous belt 95. In the second drive mechanism 10, one end of a second crank 101 is connected to a second gear 4 via a second drive shaft 8, and the other end of a second crank 101 is connected to a synchronous pulley 104 via a driven drive shaft 103. The synchronous pulley 104 is connected to the second gear 4 via a synchronous belt 105.

[0054] In this embodiment, it is further preferred that the line connecting the axes of the first intermediate gear 5 and the second intermediate gear 6 has an included angle θ with the line connecting the axes of the first gear 3 and the second gear 4. The angle θ can be between 0 and 15°, that is, the line connecting the axes of the first intermediate gear 5 and the second intermediate gear 6 does not completely coincide with the line connecting the axes of the first gear 3 and the second gear 4. During installation, the backlash of the gears at the meshing point of the first gear 3 and the first intermediate gear 5, and the meshing point of the second intermediate gear 6 and the second gear 4 can be eliminated by adjusting the included angle θ, thereby meeting the requirement of eliminating backlash in gear meshing, improving the transmission accuracy of the transmission gear set, and improving the transmission performance.

[0055] When the output shaft of the drive motor 13 rotates in both directions, it drives the drive gear 14 to rotate in both directions. The drive gear 14 then drives the first gear 3 to rotate. The first gear 3 then drives the second gear 4 to rotate synchronously through the first intermediate gear 5 and the second intermediate gear 6. The first gear 3 and the second gear 4 rotate at the same speed but in opposite directions. Then, through the first drive mechanism 9 and the second drive mechanism 10, they drive the lower sealer 2 and the upper sealer 1 to perform closing or opening movements.

[0056] This embodiment achieves backlash elimination by installing a first intermediate gear 5 and a second intermediate gear 6 between the first gear 3 and the second gear 4 and adjusting the included angle θ. This not only simplifies the overall structure and makes operation convenient and quick, but also allows for precise adjustment, ensuring the transmission accuracy and performance of the gear set and meeting transmission requirements. Furthermore, by increasing the center distance between the first gear 3 and the second gear 4, taller packages, such as five-pack instant noodles, can be packaged without increasing or even decreasing the diameter of the first gear 3 and the second gear 4. This significantly reduces the space occupied by the gear set, thereby reducing the space occupied by the horizontal sealing device.

[0057] In this embodiment, it is further preferred that the diameter and number of teeth of the first gear 3, the second gear 4, the first intermediate gear 5, and the second intermediate gear 6 are all the same, and the meshing point of the first intermediate gear 5 and the second intermediate gear 6 coincides with the center point of the line connecting the axes of the first gear 3 and the second gear 4. This can achieve a stable transmission with a transmission ratio of 1:1 while ensuring the elimination of backlash.

[0058] To facilitate adjustment of the included angle θ between the axes of the first intermediate gear 5 and the second intermediate gear 6, and to achieve backlash elimination adjustment, in this embodiment, it is further preferred that the first gear shaft 11 and the second gear shaft 12, which are connected to the first intermediate gear 5 and the second intermediate gear 6, are mounted on the frame 16 via a mounting assembly 15. The mounting assembly 15 is configured to rotate relative to the frame 16, thereby adjusting the included angle θ between the axis of the first intermediate gear 5 and the second intermediate gear 6 and the axis of the first gear 3 and the second gear 4.

[0059] In this embodiment, more preferably, the mounting assembly 15 includes a mounting plate (not shown in the figure), with a central rotating shaft 151 extending from the rotation center of the mounting plate. The central rotating shaft 151 is rotatably connected to the frame 16. Two shaft holes 152 are provided on the mounting plate, and the first gear shaft 11 and the second gear shaft 12 are correspondingly and fixedly connected to the two shaft holes 152. There is no relative rotation between the first gear shaft 11, the second gear shaft 12, and the mounting plate. The mounting plate has multiple arc-shaped mounting holes 153 distributed on a circumference centered on the axis of the central rotating shaft 151. The arc-shaped mounting holes 153 are fixedly connected to the frame 16 by fasteners. Rotating the mounting plate around the central rotating shaft 151 adjusts the included angle θ, and the mounting plate (i.e., the first intermediate gear 5 and the second intermediate gear 6) is fixed in the adjusted position by fasteners.

[0060] The mounting plate can be a single piece; however, for ease of installation, it is preferred in this embodiment to be a split structure. The mounting plate includes a first mounting plate 154 and a second mounting plate 155. The first mounting plate 154 is preferably rectangular and generally horizontally oriented, while the second mounting plate 155 is preferably rhomboid. Two arc-shaped mounting holes 153 are provided on the first mounting plate 154 at both ends along its length. A central rotating shaft 151 extends to one side from the rotation center of the first mounting plate 154. A shaft hole 152 is provided at each end of the length of the second mounting plate 155 (i.e., the upper and lower ends of the second mounting plate 155). Four sets of mounting holes 158 are provided at both ends of the width of the second mounting plate 155 and on the first mounting plate 154. The first mounting plate 154 and the second mounting plate 155 are fixedly connected together by four bolts (not shown in the figure), which are arranged around the central rotating shaft 151 and between the two arc-shaped mounting holes 153.

[0061] During installation, firstly, assemble and fix the first gear shaft 11 and second gear shaft 12, which are already installed with the first intermediate gear 5 and the second intermediate gear 6, together with the two shaft holes 152 on the second mounting plate 155. Then, fix the second mounting plate 155 and the first mounting plate 154 together with four bolts. Finally, assemble the central rotating shaft 151 together with the frame 16. Rotating the first mounting plate 154 and the second mounting plate 155 can adjust the included angle θ. After adjustment, fix it to the frame 16 with two bolts 156 (the two bolts 156 slide in the two arc-shaped mounting holes 153 respectively). Fix the first mounting plate 154 and the second mounting plate 155 at any angle position to ensure the backlash elimination effect after adjustment. The arc-shaped mounting holes 153 are fan-shaped, and their length can be used to control the maximum clockwise and counterclockwise rotation angle of the angle adjustment. The length should not be too long, only enough to meet the backlash elimination requirements.

[0062] like Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, it is further preferred that the first gear shaft 11 and the second gear shaft 12 have a clearance fit with the corresponding shaft holes 152. An adjustment mechanism 157 is provided on the second mounting plate 155 to adjust the eccentricity between the axis of the first gear shaft 11 and the axis of the corresponding shaft hole 152. Thus, after the first mounting plate 154 and the second mounting plate 155 are adjusted to their positions as described above, the operator can further use the adjustment mechanism 157 to push the first gear shaft 11 and the second gear shaft 12, that is, to further fine-tune the included angle θ. The operator can observe and completely eliminate the gear backlash, achieving a good backlash elimination effect.

[0063] In this embodiment, more preferably, the adjustment mechanism 157 includes two adjustment screw holes (not shown in the figure) disposed on the sides of both ends of the second mounting plate 155. The two adjustment screw holes are respectively disposed corresponding to two shaft holes 152. Adjusting bolts are installed in the adjustment screw holes. After the adjusting bolts are inserted into the adjustment screw holes, they press against the first gear shaft 11 or the second gear shaft 12 in the shaft hole 152 from the side. Turning the adjusting bolts pushes the first gear shaft 11 or the second gear shaft 12 in the shaft hole 152 from the side, thereby adjusting the eccentric distance between the axis of the first gear shaft 11 and the second gear shaft 12 and the axis of the corresponding shaft hole 152. Furthermore, based on rotating the mounting plate, the included angle θ can be further finely adjusted until the gear backlash is eliminated. Preferably, the shaft hole 152 is a shaft hole with a straight section in the middle.

[0064] In this embodiment, it is further preferred that the two second drive arms 102 in the two sets of second drive mechanisms 10 are respectively fixedly connected to a tool holder 18. A through hole (not shown in the figure) is opened on the tool holder 18, and the guide rod 221 passes through the through hole of the tool holder 18. The tool holder 18 is installed above the upper sealing device 1. One end of the tool holder 18 is fixed to the second drive arm 102 by screws. When the second drive arm 102 moves, it drives the tool holder 18 to move. Due to the limitation of the tool holder 18, it also moves synchronously with the guide rod 221.

[0065] In this embodiment, a cutting motion assembly is installed below the other end of the blade holder 18. A cutting blade 17 is installed at the bottom of the cutting motion assembly. When the blade holder 18 moves with the second drive arm 102, it pushes the cutting motion assembly to move. The cutting motion assembly includes a cutting guide rod 23. The cutting blade 17 is installed at the bottom of the cutting guide rod 23. The cutting guide rod 23 passes through the upper sealing device 1. The cutting guide rod 23 and the upper sealing device 1 can slide relative to each other. The cutting blade 17, which is embedded in the upper sealing device 1, is fixedly connected to the cutting guide rods 23 on both sides.

[0066] A limiting rod 25 extends to one side from the top of the cutter guide rod 23. A cutter spring 24 is fitted on the top of the cutter guide rod 23. The cutter spring 24 is positioned above the upper sealing device 1. The limiting rod 25 is positioned above the cutter spring 24. The limiting rod 25 can be one, two symmetrically arranged, or a ring structure. When the cutter holder 18 moves with the second drive arm 102, it pushes the cutter guide rod 23 to move.

[0067] While the second drive arm 102 moves in a circular motion, the knife holder 18 also moves in a circular motion. When the second drive arm 102 moves downward to engage the upper sealer 1 and the lower sealer 2 together for sealing, the knife holder 18 continues to move downward, thereby driving the cutter guide rod 23 downward, causing the cutter 17 to extend to the cutting height position. At this time, the cutter spring 24 is compressed under the action of the limit rod 25. After passing the cutting position, under the reset action of the cutter spring 24, the cutter spring 24 pushes the limit rod 25 upward, thereby driving the cutter guide rod 23 and the cutter 17 to move upward to the initial height position. By setting the knife holder 18 and the cutter spring 24 so that the cutter 17 extends and retracts with the movement of the upper sealer 1 and the lower sealer 2, no additional drive device is required, making the structure simpler and the operation more convenient and reliable. In addition, in this embodiment, the knife holder 18 that drives the movement of the cutter 17 is also installed between the two cranks, which also helps to reduce the overall volume of the horizontal sealing device and simplify its structure.

[0068] like Figure 1 and Figure 7 As shown, in this embodiment, sealing device guide assemblies 26 are respectively installed at both ends of the upper sealing device 1 and the lower sealing device 2. The sealing device guide assembly 26 includes a sealing device guide sleeve 261, a sealing device compression spring 262, and a guide post 263. Taking the upper sealing device 1 as an example, the bottom end of the guide post 263 is fixed on the upper sealing device 1, and the guide post 263 passes through the corresponding second drive arm 102. The sealing device compression spring 262 is installed above the top of the guide post 263. The sealing device guide sleeve 261 is a cylindrical structure with a top sealing, which is fitted on the outside of the sealing device compression spring 262 and the guide post 263. An adjusting nut 264 for adjusting the engagement time of the upper sealing device 1 is provided on the top of the guide post 263. The initial contraction of the sealing spring 262 is adjusted by adjusting the nut 264, which adjusts the distance between the sealing device and the corresponding drive arm, thereby adjusting the engagement time of the upper sealing device 1 and the lower sealing device 2 to adapt to the contact time between the upper sealing device 1 and the lower sealing device 2 and the packaging film required by different processes.

[0069] After the upper sealer 1 and lower sealer 2 approach each other and engage, as the first drive arm 92 and the second drive arm 102 move closer together, the guide posts 263 on the upper sealer 1 and lower sealer 2 slide relative to the sealer guide sleeves 261 at the ends of the corresponding drive arms. The sealer compression spring 262 ensures that the upper sealer 1 and lower sealer 2 remain engaged during this sliding process, extending the contact time between the upper sealer 1 and lower sealer 2 and the film, effectively improving the reliability of the packaging bag seal. Simultaneously, as the first drive arm 92 and the second drive arm 102 move closer together and the sealer compression spring 262 is compressed, the blade holders 18 on both sides move further downward, pushing the cutter guide rod 23. The cutter guide rod 23 compresses the cutter spring 24, which, while compressed, drives the lower cutter 17 to move downward and extend from the upper sealer 1, thus completing the cutting action. This allows the packaging film to cut and separate the sealed packaging bag during the closing process of the upper sealer 1 and lower sealer 2. The cutter 17 retracts under the action of the cutter spring 24, causing the packaging film to cut the sealed packaging bag apart during the closing process of the upper sealer 1 and the lower sealer 2.

[0070] The above solution has the following beneficial effects:

[0071] The horizontal sealing device provided by this utility model has a reasonable structural design, which can not only ensure packaging quality and sealing effect and greatly improve packaging efficiency, but also help to reduce the overall volume of the horizontal sealing device and reduce the space occupied by the horizontal sealing device.

[0072] Example 2:

[0073] like Figure 8 As shown, the difference from the structure described in Embodiment 1 is that in this embodiment, both the first drive arm 92 and the second drive arm 102 are structures that extend to one side, that is, one end of the drive arm has an outwardly extending portion relative to the crank at that end, and the connection point between the guide rod 221 in the synchronization mechanism 22 and the corresponding first drive arm 92 and second drive arm 102 is located on the extended portion of the first drive arm 92 and the second drive arm 102 outside the first crank 91 and the second crank 101.

[0074] In this embodiment, the synchronization mechanism 22 can also drive the feeding conveyor 19 and the discharging conveyor 20 to move back and forth laterally while the upper sealer 1 and the lower sealer 2 are running, and the distance between the feeding conveyor 19 and the discharging conveyor 20 remains unchanged.

[0075] In this embodiment, the sealing guide assembly 26, like the synchronization mechanism 22, has its connection point with the corresponding first drive arm 92 and second drive arm 102 located on the extended portions of the first drive arm 92 and second drive arm 102 outside the first crank 91 and second crank 101.

[0076] In this embodiment, the bottommost first gear 3 is directly used as the driving gear and connected to the output shaft of the drive motor 13. A set of drive motors 13 is installed on the drive transmission mechanisms at both ends of the upper sealer 1 and the lower sealer 2. The two sets of drive motors 13 move synchronously through the controller.

[0077] The other structures are the same as those described in Embodiment 1, and will not be described in detail here.

[0078] The horizontal sealing device structure in this embodiment can also simplify the structure of the horizontal sealing device and reduce its cost.

[0079] Example 3:

[0080] This embodiment provides a packaging machine, including a material conveyor, a feeding conveyor belt, a discharging conveyor belt, a longitudinal sealing device, and a transverse sealing device. The material to be packaged is placed on the material conveyor. The longitudinal sealing device and the transverse sealing device are arranged back and forth along the running direction of the feeding conveyor belt and the discharging conveyor belt. The material in the packaging bag first reaches the longitudinal sealing device to complete the longitudinal sealing of the packaging bag, and then moves further to the position of the transverse sealing device to complete the transverse sealing and cutting.

[0081] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A horizontal sealing device, comprising an upper sealer and a lower sealer, characterized in that: The upper and lower sealing devices are equipped with drive transmission mechanisms at both ends. A set of synchronization mechanisms is also installed at both ends of the upper and lower sealing devices. The synchronization mechanisms drive the feeding and discharging mechanisms to move laterally back and forth while the upper and lower sealing devices are running. The synchronization mechanism includes a guide rod, a sleeve, and a connecting seat. The connecting seat is connected to the feeding and discharging mechanisms. The sleeve is fixed on the connecting seat. The bottom end of the guide rod is fixedly connected to the lower sealing device. The guide rod passes upward through the sleeve and the upper sealing device. The guide rod is connected to the drive transmission mechanism and can slide relative to the sleeve and the upper sealing device.

2. The horizontal sealing device according to claim 1, characterized in that: The drive transmission mechanism includes a drive motor, a transmission mechanism and a drive mechanism. The drive mechanism is a double-crank motion mechanism consisting of two cranks and a drive arm. The two cranks are respectively connected to the transmission mechanism. The upper sealer, the lower sealer and the guide rod are respectively connected to the corresponding drive arm. The connection point between the guide rod and the drive arm is located between the two cranks; or, the drive arm extends to one side, and the connection point between the guide rod and the drive arm is located on the drive arm outside the crank.

3. The horizontal sealing device according to claim 2, characterized in that: A blade holder is mounted on the drive arm and positioned above the upper sealer. One end of the blade holder has a through hole through which the guide rod passes. A cutting motion assembly is mounted below the other end of the blade holder, and a cutter is mounted at the bottom of the cutting motion assembly. When the blade holder moves with the drive arm, it drives the cutting motion assembly to move up and down.

4. The horizontal sealing device according to claim 3, characterized in that: The cutting motion assembly includes a cutting guide rod and a cutting spring. A cutting blade is installed at the bottom of the cutting guide rod, and the cutting spring is installed at the top of the cutting guide rod. A limiting rod extends laterally from the top of the cutting guide rod, and the limiting rod restricts the cutting spring between the limiting rod and the top surface of the upper sealer. When the blade holder moves with the drive arm, it drives the cutting guide rod to move.

5. The horizontal sealing device according to claim 2, characterized in that: Sealing guide assemblies are also installed at both ends of the upper and lower sealing devices. The sealing guide assemblies are installed on the drive arm between the two cranks; or, installed on the drive arm outside the cranks.

6. The horizontal sealing device according to claim 5, characterized in that: The sealing device guide assembly includes a sealing device guide sleeve, a sealing device compression spring, and a guide post. The sealing device guide sleeve is a cylindrical structure with one end sealed, which is fitted on the outside of the sealing device compression spring and the guide post. One end of the guide post passes through the corresponding drive arm and is fixed to the sealing device. The sealing device compression spring is installed between the other end of the guide post and the sealing device guide sleeve.

7. The horizontal sealing device according to any one of claims 2-6, characterized in that: The transmission mechanism includes a transmission gear set, which includes a drive gear, a first gear, and a second gear. A first intermediate gear and a second intermediate gear are disposed between the first gear and the second gear. The drive gear, the first gear, the first intermediate gear, the second intermediate gear, and the second gear mesh sequentially. The drive gear is connected to the output shaft of the drive motor. The first gear and the second gear are respectively connected to a first drive shaft and a second drive shaft. The first intermediate gear and the second intermediate gear are respectively connected to a first gear shaft and a second gear shaft. The first gear shaft and the second gear shaft are mounted on the frame through a mounting assembly. The first drive shaft and the second drive shaft are respectively connected to a first drive mechanism and a second drive mechanism.

8. The horizontal sealing device according to claim 7, characterized in that: The line connecting the axes of the first intermediate gear and the second intermediate gear has an angle θ with the line connecting the axes of the first gear and the second gear. Adjusting the angle θ eliminates gear backlash.

9. The horizontal sealing device according to claim 7, characterized in that: The mounting assembly includes a mounting plate with a central rotating shaft extending from its center. The central rotating shaft is rotatably connected to the frame. The mounting plate has two shaft holes, and the first gear shaft and the second gear shaft are fixedly connected to the two shaft holes respectively. The mounting plate has multiple arc-shaped mounting holes distributed on a circumference centered on the axis of the central rotating shaft. The arc-shaped mounting holes are fixedly connected to the frame by fasteners.

10. A packaging machine, characterized in that: Includes the horizontal sealing device as described in any one of claims 1-9.

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