A vertical bag sealer

Abstract

The utility model relates to the technical fields of bag sealing machine, propose a kind of vertical bag sealing machine, including the upper bin and lower bin of being able to mutually close to form sealed cavity, heat sealing head located in sealed cavity, heat sealing head includes upper rotary bag feeding mechanism, wherein, still include with the positive and negative transmission mechanism of upper rotary bag feeding mechanism connection, double -end motor and vacuum pump, the one end of motor is directly connected with positive and negative transmission mechanism or through transmission device and positive and negative transmission mechanism connection, the other end of motor is connected with vacuum pump, when motor positive rotation, through driving positive and negative transmission mechanism action to drive upper rotary bag feeding mechanism action realizes bag feeding, when motor reverse rotation, upper rotary bag feeding mechanism stops bag feeding, motor drives vacuum pump work to carry out vacuumizing to sealed cavity. Bag feeding function and vacuumizing function can only be selected to carry out, ensure that bag can keep stable position when vacuumizing, make vacuumizing effect controllability high.

Description

Technical Field

[0001] This utility model relates to the technical field of bag sealing machines, specifically to a vertical bag sealing machine. Background Technology

[0002] A sealing machine is a machine that seals the packaging bags after food has been packaged in them. Sealed bags preserve food, keeping it clean and hygienic. To extend shelf life, vacuum sealing is often necessary during packaging. Since different types of food often use different sized bags, a vacuum sealing machine has emerged to meet varying sealing lengths and vacuum sealing requirements. Referring to Chinese patent CN218431924U, this machine requires a separate vacuum system to achieve the desired effect, resulting in a large size. Furthermore, this design relies solely on a roller mechanism for bag transport. Due to the contact friction between the bag and the heating element, and the rolling friction between the bag and the roller mechanism, the bag may not advance quickly enough, affecting efficiency. Additionally, the roller mechanism only provides localized pressure on the bag, leading to bag misalignment and poor sealing neatness. Utility Model Content

[0003] In view of this, this application provides a vertical bag sealing machine to solve the technical problems of existing devices being large in size, prone to displacement during bag conveying, and not being able to seal securely.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A vertical bag sealing machine includes an upper chamber and a lower chamber that can be brought close together to form a sealed cavity, and a heat sealing head located within the sealed cavity. The heat sealing head includes an upper rotary bag feeding mechanism, and further includes a forward and reverse transmission mechanism connected to the upper rotary bag feeding mechanism, a dual-head motor, and a vacuum pump. One end of the motor is directly connected to the forward and reverse transmission mechanism or connected to the forward and reverse transmission mechanism through a transmission device, and the other end of the motor is connected to the vacuum pump. When the motor rotates forward, it drives the upper rotary bag feeding mechanism to feed bags by driving the forward and reverse transmission mechanism. When the motor rotates in reverse, the upper rotary bag feeding mechanism stops feeding bags, and the motor drives the vacuum pump to evacuate the sealed cavity.

[0006] Furthermore, the forward and reverse transmission mechanism includes a built-in ratchet gear ring and a pawl disc disposed within the built-in ratchet gear ring. The motor drives the pawl disc to rotate forward and in reverse. The built-in ratchet gear ring is connected to the upper rotary bag conveying mechanism through a transmission mechanism.

[0007] Furthermore, the forward and reverse transmission mechanism also includes a hollow shaft that penetrates the side wall of the sealed cavity, a ratchet disc is mounted on the hollow shaft, and the other end of the hollow shaft extends into the transition cavity, with the air inlet of the vacuum pump connected to the transition cavity.

[0008] Furthermore, the transmission device is a reducer installed in the transition cavity. The input end of the reducer is connected to the motor, and the output end of the reducer is connected to the hollow shaft, which passes through the reducer.

[0009] Furthermore, the upper transfer bag mechanism is a belt conveyor mechanism.

[0010] Furthermore, the transmission mechanism includes a double-row gear connected to a built-in ratchet gear ring, and a first driven gear and a second driven gear meshing with different gear rings of the double-row gear. The first driven gear and the second driven gear are respectively coaxially arranged with the corresponding synchronous pulleys of the upper rotary bag conveyor mechanism.

[0011] Furthermore, the heat sealing head also includes a heat sealing worktable assembly located below the upper return bag conveying mechanism. The heat sealing worktable assembly includes an elastic floating seat, two sets of synchronously moving driven belt conveying mechanisms disposed on the elastic floating seat, and an elastic floating heating component located between the two sets of driven belt conveying mechanisms. The driven belt conveying mechanisms move synchronously with the upper return bag conveying mechanism through a gear transmission mechanism.

[0012] Furthermore, the flexible floating heating assembly has a raised heat sealing head, above which is a corresponding synchronous pulley that meshes with the synchronous belt of the upper rotary bag conveyor mechanism to double seal the bag body.

[0013] During the sealing process, the heat sealing head of the elastic floating heating component floats upward under the action of the spring and presses against the timing belt;

[0014] A guide plate is installed above the synchronous belt; the synchronous belt is limited between the guide plate and the synchronous belt pulley when it is running.

[0015] The number of synchronous pulleys can be four or three;

[0016] When the number of synchronous belt pulleys is three, the upper rotary bag conveyor mechanism includes a synchronous belt, a first transmission pulley, a second transmission pulley, and a third transmission pulley covered by the synchronous belt. Each of the first, second, and third transmission pulleys is provided with a connecting shaft. Each connecting shaft is coaxially arranged with the corresponding transmission pulley shaft hole. Each transmission pulley connecting shaft is provided with a gear, and each gear meshes in sequence. The connecting shaft of the second transmission pulley is connected to the output end of the reducer, and the input end of the reducer is connected to the drive motor. The drive motor drives the second transmission pulley to rotate through the reducer. The second transmission pulley drives the first and third transmission pulleys to rotate synchronously through the meshing of the gears.

[0017] Furthermore, the elastic floating heating assembly has two protruding heat-sealing heads arranged sequentially along the bag conveying direction. Above the heat-sealing heads is a corresponding synchronous pulley that meshes with the synchronous belt of the upper rotary bag conveying mechanism to double seal the bag.

[0018] Furthermore, the heat sealing head is equipped with two detection switches, and the heat sealing head is located between the two detection switches.

[0019] Furthermore, the detection switch is a photoelectric switch.

[0020] Furthermore, the lower chamber is connected to the lifting cylinder, and the outlet of the vacuum pump is connected to the lifting cylinder through a pipeline, and the pipeline is equipped with a dual-path electromagnetic control valve.

[0021] As can be seen from the above technical solution, the advantages of this utility model are:

[0022] 1. This application integrates a motor, a vacuum pump, and a forward and reverse transmission mechanism. The forward and reverse rotation of the motor controls the independent operation of bag feeding and vacuuming. The structure is compact and small in size. The bag feeding and vacuuming functions share the same motor, which also reduces the cost of the equipment. Furthermore, the bag feeding and vacuuming functions can only be performed one at a time, ensuring that the bag can maintain a stable position during vacuuming and making the vacuuming effect highly controllable.

[0023] 2. In this application, two sets of synchronous belt drive mechanisms that fit together are used to make the bag move synchronously with the synchronous belt, so that the bag moves reliably and the bag and the heat sealing head always maintain surface contact, so that the bag is not easy to deflect during the movement, and the sealing line is neat, beautiful and reliable.

[0024] 3. In this application, two heat-sealing heads are set to double-seal the bag body, making the seal more secure.

[0025] 4. This application utilizes a vacuum pump to provide air to the lifting cylinder, which makes reasonable use of energy, saves on the air supply system, and makes it more convenient to use. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0027] Figure 1 This is a schematic diagram of the structure of the first embodiment of this application. Figure 1 .

[0028] Figure 2 This is a schematic diagram of the structure of the first embodiment of this application. Figure 2 .

[0029] Figure 3This is a bottom view of the first embodiment of this application.

[0030] Figure 4 This is the first embodiment of the present application. Figure 3 Schematic diagram of the BB direction section.

[0031] Figure 5 This is a schematic diagram of the forward and reverse transmission mechanism according to the first embodiment of this application.

[0032] Figure 6 This is a schematic diagram of the internal structure of the first embodiment of this application.

[0033] Figure 7 This is a schematic diagram of the internal structure of the heat-sealing workbench assembly according to the first embodiment of this application.

[0034] Figure 8 This is a schematic diagram of a guide plate structure above the synchronization belt according to the first embodiment of this application.

[0035] Figure 9 This is a schematic diagram of the structure of the three transmission wheels in the second embodiment of this application.

[0036] Figure 10 This is a schematic diagram of the structure of the motor and one of the transmission wheels in the second embodiment of this application.

[0037] Explanation of reference numerals in the attached drawings: 1-Frame; 2-Upper chamber; 3-Lower chamber; 4-Lifting drive mechanism; 5-Inner fixed frame; 6-Upper rotary bag conveying mechanism; 61-Synchronous pulley; 62-Synchronous belt; 63-Axle; 64-First transmission wheel; 65-Second transmission wheel; 66-Third transmission wheel; 7-Heat sealing workbench assembly; 71-Fixed seat; 72-Elastic floating seat; 73-Driven belt conveyor mechanism; 74-Elastic floating heating assembly; 75-Heat sealing head; 8-Gear transmission mechanism; 9-Forward and reverse transmission mechanism; 91-Double row gear; 92-First driven gear; 93-Second driven gear; 94-Built-in ratchet ring; 95-Pawl disc; 96-Hollow shaft; 10-Motor; 11-Vacuum pump; 12-Transition cavity; 13-Guide plate; 14-Reducer; 15-Drive motor; 16-Gear. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0039] First embodiment:

[0040] refer to Figures 1 to 7 ,like Figure 1 ,Figure 2 , Figure 3 and Figure 4 As shown, this embodiment provides a vertical bag sealing machine, including a frame 1, an upper chamber 2 and a lower chamber 3 mounted on the frame 1 and positioned close to each other to form a sealed cavity, and a heat sealing head located within the sealed cavity. The heat sealing head includes an upper rotary bag feeding mechanism 6. The vertical bag sealing machine also includes a forward and reverse transmission mechanism 9 connected to the upper rotary bag feeding mechanism 6, a dual-head motor 10, and a vacuum pump 11. One end of the motor 10 is directly connected to the forward and reverse transmission mechanism 9 or connected to the forward and reverse transmission mechanism 9 through a transmission device. The other end of the motor 10 is connected to the vacuum pump 11. When the motor 10 is in forward rotation, it drives the upper rotary bag feeding mechanism 6 to feed bags by driving the forward and reverse transmission mechanism 9. When the motor 10 is in reverse rotation, the upper rotary bag feeding mechanism 6 stops feeding bags, and the motor 10 drives the vacuum pump 11 to evacuate the sealed cavity. In this solution, compared to the independent drive system and vacuum adsorption system in the prior art, the forward and reverse rotation of the motor 10 controls the bag feeding drive and vacuum start, making the device structure more compact and smaller in size.

[0041] In this embodiment, the upper chamber 2 is fixedly connected to the frame 1, the lower chamber 3 is slidably connected to the frame 1, and the lower chamber 3 is connected to the lifting drive mechanism 4 set on the frame 1. The upper chamber 2 is provided with an inner fixing frame 5, and the inner fixing frame 5 extends into the lower chamber 3. The heat sealing head is set on the inner fixing frame 5. The lower opening of the upper chamber 2 and the upper opening of the lower chamber 3 are provided with sealing strips that can abut against each other to improve the sealing performance of the sealing cavity. When the upper chamber 2 and the lower chamber 3 are separated, the bag enters the heat sealing head along the gap between the upper chamber 2 and the lower chamber 3. The lifting drive mechanism 4 is a lifting cylinder, a hydraulic cylinder, a linear motor, a screw and nut mechanism, or a solenoid valve.

[0042] Preferably, in this application, the lifting drive mechanism 4 is a lifting cylinder connected to the frame 1, and the outlet of the vacuum pump 11 is connected to the lifting cylinder through a pipeline, and there is no dual-path electromagnetic control valve on the pipeline.

[0043] When the forward and reverse transmission mechanism 9 is connected to the driven belt conveyor mechanism 73 of the heat sealing machine head, it can also be configured as a structure in which the upper assembly 2 can be lifted and moved, and the lower assembly 3 is fixed.

[0044] In this application, the forward and reverse transmission mechanism 9 can be a one-way bearing, which uses the one-way rotation function of the one-way bearing to satisfy the one-way movement of the upper return bag conveying mechanism 6. However, the one-way bearing has a limited torque capacity and is expensive.

[0045] To meet the requirements of high torque, such as Figure 5As shown, in this embodiment, preferably, the forward and reverse transmission mechanism 9 includes a built-in ratchet ring 94 and a pawl disc 95 disposed within the built-in ratchet ring 94. The motor 10 drives the pawl disc 95 to rotate forward and backward. The built-in ratchet ring 94 is connected to the upper rotary bag conveying mechanism 6 through a transmission mechanism. During operation, when the motor 10 drives the pawl disc 95 to rotate forward, it drives the built-in ratchet ring 94 to rotate, thereby overcoming a certain damping force to drive the upper rotary bag conveying mechanism 6 to move and convey bags. When the motor 10 drives the pawl disc 95 to rotate in the reverse direction, the contact friction between the upper rotary bag conveying mechanism 6 and the elastic floating heating component 74, or the elastic damping mechanism disposed on the frame 1 that can prevent the upper rotary bag conveying mechanism 6 from rotating freely, is used to keep the upper rotary bag conveying mechanism 6 in a stationary state, thereby keeping the bag in a stable position under vacuum. At the same time, the motor 10 drives the vacuum pump 11 to perform a vacuuming action on the sealed cavity, completing the vacuuming work.

[0046] To make the structure more compact, the forward and reverse transmission mechanism 9 also includes a hollow shaft 96 that penetrates the side wall of the sealed cavity. A ratchet disc 95 is mounted on the hollow shaft 96, and the other end of the hollow shaft 96 extends into the transition cavity 12. The air inlet of the vacuum pump 11 is connected to the transition cavity 12 through a pipeline. The motor 10 is connected to the hollow shaft 96 through a gear transmission structure or a chain transmission structure. This structure allows for shorter pipeline usage distances and avoids the need to re-machine the vacuum hole on the upper assembly 2, making it easier to connect the vacuum pipeline. When the vacuum suction tube is a flexible tube, its short length increases its strength and makes it less prone to deformation, thus preventing vacuum tube adsorption deformation from affecting vacuum efficiency.

[0047] The structure of the pawl disc 95 is as follows Figure 5 As shown, multiple pawls are evenly distributed on it (the shape and distribution of the pawls can be clearly seen in the figure). These pawls have a certain degree of elasticity and range of motion (the meshing structure of ratchet pawls is common knowledge to those skilled in the art). The pawl disc 95 is mounted on the hollow shaft 96 and can rotate with the hollow shaft 96;

[0048] When motor 10 drives the ratchet disc 95 to rotate in the forward direction, the ratchet will engage with the ratchet teeth of the built-in ratchet ring 94 (see attached image). Figure 5 The engagement relationship between the pawl and the ratchet can be clearly seen (and the meshing of the ratchet and pawl is common knowledge). As the pawl disc 95 continues to rotate in the forward direction, the pawl will push the built-in ratchet gear ring 94 to rotate together. The built-in ratchet gear ring 94 is connected to the upper rotary bag conveying mechanism 6 through a transmission mechanism (such as a double-row gear 91). During the rotation, it will overcome a certain damping force, thereby driving the upper rotary bag conveying mechanism 6 to move and convey bags.

[0049] When the motor 10 drives the ratchet disk 95 to rotate in the opposite direction, the ratchet will slide on the inclined surface of the ratchet teeth and will not be able to push the built-in ratchet tooth ring 94 to rotate. At this time, there is a certain contact friction between the upper bag conveying mechanism 6 and the elastic floating heating component 74 (this is because the two have a certain contact pressure in their structural design; specifically, the elastic floating heating component 74 floats upward under the action of elastic elements such as springs, and comes into contact with the rotating part of the upper bag conveying mechanism 6. When the rotating part moves, it overcomes the friction to generate relative movement with the elastic floating heating component 74). This contact friction is sufficient to prevent the upper bag conveying mechanism 6 from rotating freely; or as described in the instruction manual, an elastic damping mechanism that can prevent the upper bag conveying mechanism 6 from rotating freely is set on the frame 1 (for example, the ratchet ring 94 is connected to the hollow shaft 96 using a one-way bearing or a stop block with a spring is installed on the frame 1. When the upper bag conveying mechanism 6 has a tendency to rotate in the opposite direction, the stop block will generate resistance under the action of the spring), thereby keeping the upper bag conveying mechanism 6 stationary and keeping the bag in a stable position under vacuum. At the same time, the motor 10 drives the vacuum pump 11 to perform a vacuuming action on the sealed cavity, completing the vacuuming work.

[0050] The damping force mainly comes from the friction of the upper transfer bag mechanism 6 itself and any additional damping devices that may be installed. Although the specification does not mention the specific structure of the additional damping device in detail, it can be added as needed in actual design. This structure is a common technology in the prior art, such as one-way bearings or various shaft / disc dampers in the prior art. Many existing technologies can be found by searching keywords. It can be seen that whether the specific structure of the damping device is disclosed in detail does not affect the completeness of the technical solution.

[0051] In this embodiment, the transmission device is preferably a speed reducer. The motor 10 is connected to the hollow shaft 96 through the speed reducer. The speed reducer is located in the transition cavity 12. The sealing of the transition cavity 12 can achieve noise reduction while protecting the speed reducer, preventing moisture or dust in the air from affecting the service life of the speed reducer.

[0052] Specifically, the input end of the reducer is connected to the motor 10, and the output end of the reducer is connected to the hollow shaft 96. The hollow shaft 96 passes through the reducer so that the air outlet of the hollow shaft 96 is connected to the transition cavity 12. By using the reducer, the output shaft of the motor 10 and the hollow shaft 96 can be parallel or perpendicular to each other.

[0053] The transmission device can also be a constant velocity gear transmission device or a chain transmission device.

[0054] The vacuum pump 11 can also be installed at the end or side of the motor 10 via a corresponding transmission mechanism.

[0055] In this application, the upper transfer bag mechanism 6 can be a roller structure as in the prior art.

[0056] In this embodiment, the upper transfer bag mechanism 6 is preferably a belt conveyor mechanism. The belt conveyor mechanism is used to press and transport the bag body through surface contact. Compared with the existing line contact, it can avoid the bag body from shifting due to uneven force during movement, which would affect the aesthetics and reliability of the sealing.

[0057] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in this embodiment, the transmission mechanism includes a double-row gear 91 mounted on a hollow shaft 96 and rotating synchronously with the built-in ratchet gear ring 94, and a first driven gear 92 and a second driven gear 93 meshing with different gear rings of the double-row gear 91. The first driven gear 92 and the second driven gear 93 are coaxially arranged with the corresponding synchronous pulleys 61 of the upper return bag conveying mechanism 6 via corresponding axles 63. This structure enables the first driven gear 92 and the second driven gear 93 to rotate synchronously, and by synchronously driving the two synchronous pulleys 61, the transmission power of the upper return bag conveying mechanism can be increased, making the upper return bag conveying mechanism 6 start smoothly and quickly. Furthermore, it ensures that the forces on both sides of the double-row gear 91 are balanced, preventing the hollow shaft 96 from easily deforming due to prolonged unidirectional force.

[0058] In this application, the transmission mechanism may also be a chain drive mechanism or a bevel gear assembly.

[0059] In this embodiment, the heat sealing machine head also includes a heat sealing workbench assembly 7 located below the upper return bag conveying mechanism 6. The heat sealing workbench assembly 7 includes a fixed base 71, an elastic floating base 72 slidably disposed on the fixed base 71, two sets of synchronously moving driven belt conveying mechanisms 73 disposed on the elastic floating base 72, and an elastic floating heating component 74 located between the two sets of driven belt conveying mechanisms 73 and slidably disposed on the elastic floating base 72. The driven belt conveying mechanism 73 moves synchronously with the upper return bag conveying mechanism 6 through a gear transmission mechanism 8.

[0060] Specifically, springs or other elastic elements are provided between the elastic floating seat 72 and the fixed seat 71, and between the elastic floating heating component 74 and the fixed seat 71, so that the elastic floating seat 72 and the elastic floating heating component 74 can autonomously return to their original position under the action of the springs or other elastic elements. The elastic floating seat 72 and the elastic floating heating component 74 can adapt to the sealing of bags of different thicknesses through autonomous elastic return. The lower conveyor belt of the driven belt conveyor mechanism 73 and the synchronous belt 62 of the upper rotary bag conveyor mechanism 6 are reliably attached to clamp and convey the bag. The bag moves with the belt during the conveying process without slipping, thus ensuring reliable conveying. The lower conveyor belt and the synchronous belt 62 clamp and position the bag by face-to-face contact, making it less likely for the bag to deflect during the conveying process, resulting in a beautiful, neat, and highly reliable sealing position.

[0061] Preferably, in this application, both the driven belt conveyor mechanism 73 and the upper return bag conveyor mechanism 6 are synchronous belt drive mechanisms, which can avoid affecting the conveying efficiency of the bag.

[0062] In this embodiment, the elastic floating heating component 74 has a protruding heat-sealing head 75. Above the heat-sealing head 75 is a corresponding synchronous pulley 61 that meshes with the synchronous belt 62 of the upper rotary bag conveying mechanism 6. The heat-sealing head 75 contacts the inner ring surface of the lower conveyor belt of the driven belt conveying mechanism 73. The corresponding synchronous pulley 61 supports the part of the synchronous belt 62 corresponding to the position of the heat-sealing head 75. The cooperation between the synchronous pulley 61 and the heat-sealing head 75 prevents the bag from swaying up and down with the upper and lower belts when passing through the heat-sealing head 75, resulting in a stable heat-sealing effect. Furthermore, due to the cooperation between the synchronous pulley 61 and the heat-sealing head 75, the upper belt surface of the driven belt conveying mechanism 73 and the lower belt surface of the synchronous belt 62 located between the two synchronous pulleys 61 at both ends always maintain a stable compression state at the heat-sealing position. After the heat-sealing effect, the bag moves with the operation of the driven belt, thus ensuring reliable conveying.

[0063] Preferably, the elastic floating heating assembly 74 has two protruding heat sealing heads 75 arranged sequentially along the bag conveying direction. Above the heat sealing heads 75 is a corresponding synchronous pulley 61 that meshes with the synchronous belt 62 of the upper rotary bag conveying mechanism 6. The two heat sealing heads 75 are used to double seal the bag, and the double sealing can make the bag seal more secure.

[0064] During the sealing process, the heat sealing head 75 of the elastic floating heating component 74 floats upward under the action of the spring and presses against the synchronous belt 62. The elastic floating heating component 74 is located below the corresponding synchronous pulley 61. Therefore, the upward movement of the two elastic floating heating components 74 to press against the synchronous belt 62 can prevent the synchronous belt 62 located below from skipping teeth with the two synchronous pulleys 61. When the two synchronous pulleys 61 in the middle rotate normally, it is not easy for the synchronous belt 62 in the tensioned state to skip teeth.

[0065] See Figure 8 A guide plate 13 is installed above the synchronous belt 62, and the synchronous belt 62 is limited between the guide plate 13 and the synchronous pulley 61 when it is running. By adding an auxiliary guiding structure, the normal operation of the synchronous belt 62 can be ensured, and it can also be guided and restricted, preventing the synchronous belt 62 from skipping teeth when it is running above the guide plate. The guide plate 13 does not press tightly against the synchronous belt 62; the guide plate 13 is only relatively close to the synchronous belt 62 to ensure that the synchronous belt 62 can run smoothly.

[0066] The number of synchronous pulleys 61 is four.

[0067] Specifically, the two heat seal heads 75 are located on the same horizontal straight line to ensure that the heat seal after double sealing is neat and beautiful.

[0068] In this application, the elastic floating heating component 74 may also be provided with two protruding heat sealing heads 75 arranged side by side along the width, and the two heat sealing heads 75 can be used to achieve double sealing.

[0069] In this embodiment, the heat sealing head is equipped with two detection switches, and the heat sealing head 75 is located between the two detection switches. The position of the bag can be automatically detected by the detection switches, which is faster and more accurate than manual judgment.

[0070] In this application, the detection switch is a micro switch or a photoelectric switch.

[0071] When the detection switch is a micro switch, two micro switches are set on the elastic floating seat 72 or the elastic floating heating component 74, and the heat sealing head 75 is located between the two micro switches. The position of the bag is detected by pressing the micro switches through the bag body to trigger the micro switches.

[0072] In this embodiment, the detection switch is preferably a photoelectric switch.

[0073] In this embodiment, one installation method of the detection switch is as follows: two photoelectric switches arranged sequentially along the bag feeding direction are installed on the upper chamber body 2, and the photoelectric switches are located in front of the heat sealing head 75. The position of the bag body is detected by using the bag body to block or reflect the light from the photoelectric switches to trigger the photoelectric switches.

[0074] In this embodiment, another installation method for the detection switch is as follows: two photoelectric switches are set on the elastic floating seat 72 or the elastic floating heating assembly 74, and the heat sealing head 75 is located between the two photoelectric switches. The position of the bag is detected by using the bag body to block or reflect the light from the photoelectric switches to trigger the photoelectric switches.

[0075] Preferably, in this application, the photoelectric switch is disposed on the upper compartment 2.

[0076] In operation, the upper chamber 2 and lower chamber 3 are initially separated. When a bag enters the machine, it first passes through the front photoelectric switch. The signal from the front photoelectric switch activates the motor 10 to rotate forward and the heat sealing head 75 to begin heating. The forward rotation of the motor 10 causes the upper rotary bag conveying mechanism 6 and the driven belt conveyor mechanism 73 to move and convey the bag, initiating the sealing process. When the bag leaves the rear photoelectric switch, the switch returns a signal, simultaneously activating the vacuum pump 11 by controlling the reverse rotation of the motor 10. The dual-air-path electromagnetic control valve switches to supply air to the lifting cylinder, causing the lower chamber 3 to rise. The vacuum pump 11... While the working chamber is being evacuated, air is supplied to the lifting cylinder, causing the lower chamber 3 to rise and close with the upper chamber 2. When the air pressure in the suction chamber of the lifting cylinder reaches the set pressure, the dual-air-path solenoid control valve switches to the other air path (the gas discharged from the vacuum is released into the environment). When the vacuum reaches the pressure set by the negative pressure valve, the dual-air-path solenoid control valve returns to the corresponding state (supplying air to the lifting cylinder). The lifting cylinder then moves to retract the lower chamber, and at the same time, the motor 10 starts rotating in the forward direction to deliver the bags. At this time, the remaining bags are sealed according to the program-set final sealing time. After sealing is completed, the equipment stops and goes into standby mode.

[0077] Second embodiment:

[0078] See Figure 9 and Figure 10 A vertical bag sealing machine differs from the first embodiment in that: the upper return bag conveying mechanism 6 includes a synchronous belt 62, a first transmission wheel 64, a second transmission wheel 65, and a third transmission wheel 66 covered by the synchronous belt 62. Gears 16 are provided on the connecting shafts of the three transmission wheels. The connecting shaft of the second transmission wheel 65 is connected to the output end of the reducer 14, and the input end of the reducer 14 is connected to the motor shaft of the drive motor 15. The drive motor 15 drives the second transmission wheel 65 to rotate through the reducer 14. The connecting shaft of the second transmission wheel 65 drives the first transmission wheel 64 and the second transmission wheel 65 to rotate through the meshing of the gears 16.

[0079] A lower rotary bag conveying mechanism is provided below the synchronous belt 62. The lower rotary bag conveying mechanism is a synchronous belt conveying mechanism, which includes a fourth transmission wheel and a fifth transmission wheel. The synchronous belt conveying mechanism can be mounted on a bracket. A spring is provided below the bracket so that the synchronous belt conveying mechanism floats below the synchronous belt 62 of the upper rotary bag conveying mechanism 6 under the action of the spring. An elastic floating heating component 74 is provided on one side of the lower rotary bag conveying mechanism.

[0080] All other parts not described herein are the same as in the first embodiment and will not be described in detail here.

[0081] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to the embodiments of this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vertical bag sealing machine, comprising an upper chamber (2) and a lower chamber (3) that can be brought close together to form a sealed cavity, and a heat sealing head located within the sealed cavity, the heat sealing head comprising an upper bag conveying mechanism (6), characterized in that, It also includes a forward and reverse transmission mechanism (9), a dual-head motor (10), and a vacuum pump (11) connected to the upper rotary bag conveying mechanism (6). One end of the motor (10) is directly connected to the forward and reverse transmission mechanism (9) or connected to the forward and reverse transmission mechanism (9) through a transmission device. The other end of the motor (10) is connected to the vacuum pump (11). When the motor (10) rotates in the forward direction, it drives the upper rotary bag conveying mechanism (6) to move by driving the forward and reverse transmission mechanism (9) to realize bag feeding. When the motor (10) rotates in the reverse direction, the upper rotary bag conveying mechanism (6) stops feeding bags. The motor (10) drives the vacuum pump (11) to work and evacuate the sealed cavity.

2. The vertical bag sealing machine according to claim 1, characterized in that, The forward and reverse transmission mechanism (9) includes a built-in ratchet ring (94) and a pawl disc (95) disposed in the built-in ratchet ring (94). The motor (10) drives the pawl disc (95) to rotate forward and in reverse. The built-in ratchet ring (94) is connected to the upper rotary bag conveying mechanism (6) through a transmission mechanism.

3. The vertical bag sealing machine according to claim 2, characterized in that, The forward and reverse transmission mechanism (9) also includes a hollow shaft (96) that penetrates the side wall of the sealed cavity. The ratchet disk (95) is mounted on the hollow shaft (96). The other end of the hollow shaft (96) extends into the transition cavity (12). The air inlet of the vacuum pump (11) is connected to the transition cavity (12).

4. The vertical bag sealing machine according to claim 3, characterized in that, The transmission device is a speed reducer installed in the transition cavity (12). The input end of the speed reducer is connected to the motor (10), and the output end of the speed reducer is connected to the hollow shaft (96). The hollow shaft (96) passes through the speed reducer.

5. The vertical bag sealing machine according to claim 2, characterized in that, The upper return bag mechanism (6) is a belt conveyor mechanism; The transmission mechanism includes a double-row gear (91) connected to the built-in ratchet gear ring (94), a first driven gear (92) and a second driven gear (93) meshing with different gear rings of the double-row gear (91), and the first driven gear (92) and the second driven gear (93) are respectively coaxially arranged with the corresponding synchronous pulley (61) of the upper rotary bag mechanism (6).

6. The vertical bag sealing machine according to claim 5, characterized in that, The heat sealing head also includes a heat sealing workbench assembly (7) located below the upper return bag mechanism (6). The heat sealing workbench assembly (7) includes an elastic floating seat (72), two sets of synchronously moving driven belt conveyor mechanisms (73) disposed on the elastic floating seat (72), and an elastic floating heating assembly (74) located between the two sets of driven belt conveyor mechanisms (73). The driven belt conveyor mechanism (73) moves synchronously with the upper return bag mechanism (6) through a gear transmission mechanism (8).

7. The vertical bag sealing machine according to claim 6, characterized in that, The elastic floating heating assembly (74) has a raised heat seal head (75), and above the heat seal head (75) is a corresponding synchronous pulley (61) that engages with the synchronous belt (62) of the upper rotary bag mechanism (6). During the sealing process, the heat sealing head (75) of the elastic floating heating component (74) will float upward under the action of the spring and press against the synchronous belt (62); A guide plate (13) is provided above the synchronous belt (62); when the synchronous belt (62) is running, it is limited between the guide plate (13) and the synchronous pulley (61); The number of synchronous pulleys (61) is set to four or three; When the number of synchronous pulleys (61) is three, the upper rotary bag conveyor mechanism (6) includes a synchronous belt (62), a first transmission wheel (64), a second transmission wheel (65) and a third transmission wheel (66) covered by the synchronous belt (62). The first transmission wheel (64), the second transmission wheel (65) and the third transmission wheel (66) are all provided with connecting shafts. Each connecting shaft is coaxially arranged with the corresponding transmission wheel shaft hole. Each transmission wheel (66) is provided with a gear (16) on its connecting shaft. Each gear (16) meshes in sequence. The connecting shaft of the second transmission wheel (65) is connected to the output end of the reducer (14). The input end of the reducer (14) is connected to the drive motor (15). The drive motor (15) drives the second transmission wheel (65) to rotate through the reducer (14). The second transmission wheel (65) drives the first transmission wheel (64) and the third transmission wheel (66) to rotate synchronously through the meshing of the gears (16).

8. The vertical bag sealing machine according to claim 6, characterized in that, The elastic floating heating assembly (74) has two protruding heat sealing heads (75) arranged sequentially along the bag conveying direction. Above the heat sealing head (75) is a corresponding synchronous pulley (61) that meshes with the synchronous belt (62) of the upper rotary bag conveying mechanism (6) to double seal the bag.

9. The vertical bag sealing machine according to claim 7, characterized in that, The heat sealing head is provided with two detection switches, and the heat sealing head (75) is located between the two detection switches; The detection switch is a photoelectric switch.

10. The vertical bag sealing machine according to claim 1, characterized in that, The lower chamber (3) is connected to the lifting cylinder, and the outlet of the vacuum pump (11) is connected to the lifting cylinder through a pipeline, and a dual-path electromagnetic control valve is provided on the pipeline.

Images