Vertical bag sealing machine

Abstract

The utility model discloses a vertical type bag sealing machine, and relates to the technical field of bag sealing machines, the vertical type bag sealing machine comprises two bin bodies which can be close to each other to form a sealing cavity and a heat sealing machine head located in the sealing cavity, the heat sealing machine head comprises an upper rotary bag conveying mechanism, a sealing ring is arranged on the sealing end face of each bin body, and each sealing ring is provided with a thin tongue part bulging outwards. The sealing effect of the formed sealing cavity is better, so that the vacuumizing effect is good, and the efficiency is high.

Description

TECHNICAL FIELD

[0001] The application relates to a bag sealing machine, in particular to a vertical bag sealing machine. BACKGROUND

[0002] The bag sealing machine refers to a machine for sealing a packaging bag after food is packaged in the packaging bag. The sealed packaging bag can be used for sealing and storing food, and the food can be kept clean and hygienic. In order to prolong the shelf life of food, the food needs to be vacuumized during packaging. Since different types of food use different specifications of packaging bags in most cases, in order to meet the requirements of different sealing lengths and vacuumizing functions, a vacuum sealing machine appears in the prior art, referring to Chinese patent CN218431924U. The technical solution has the following two problems. On the one hand, the ordinary sealing strip is mostly a rubber strip with high hardness, which is prone to local air leakage, poor sealing effect, and directly affects the efficiency and effect of vacuumizing. On the other hand, the vacuumizing effect can be achieved only by cooperating with a separate vacuumizing system, which makes the device bulky. In the scheme, the bag body is only transported by a roller mechanism. In view of the contact friction between the bag body and the heating assembly and the rolling friction between the bag body and the roller mechanism, the bag body is prone to not advancing in time, which affects the working efficiency. Moreover, the bag body is locally pressed by the roller mechanism, and the bag is prone to deviation, resulting in poor sealing uniformity. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the application provides a vertical bag sealing machine to solve the technical problems of low efficiency, poor effect, large device size, easy deviation of the bag body during transportation, and not firm sealing of the existing device during vacuumizing.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A vertical bag sealing machine comprises two bin bodies capable of being close to each other to form a sealing cavity, and a heat sealing head located in the sealing cavity. The heat sealing head comprises an upper rotary bag conveying mechanism. A sealing ring is arranged on the sealing end face of the bin body. The sealing ring has a thin tongue portion protruding outward.

[0006] Further, the cross section of the sealing ring is in the shape of a flat mouth.

[0007] Still further, the flat mouth of the sealing ring faces the outer side. A pressing ring connected to the bin body has a limiting ring portion inserted into the flat mouth.

[0008] Still further, the pressing ring comprises a pressing ring portion in the shape of L in cross section. One side of the pressing ring portion is the limiting ring portion. The other side of the pressing ring portion is provided with a plurality of ear arms capable of being folded. The ear arms are capable of being hooked and connected to the eave portion of the bin body after being folded.

[0009] Further, the bottom surface of the sealing ring has a convex arc part and a side pressing edge on one side of the convex arc part, and the sealing surface of the cartridge body is provided with a limiting surface abutting against the bottom surface of the sealing ring.

[0010] Further, the sealing ring is in U shape, and the sealing ring further comprises thick wall parts connected to two sides of the thin tongue part, and the sealing end surface of the cartridge body is provided with a limiting groove for inserting the thick wall parts.

[0011] Further, the device further comprises a forward-reverse transmission mechanism, a double-head motor and a vacuum pump connected to the upper rotary bag conveying mechanism, one end of the motor is directly connected to the forward-reverse transmission mechanism or connected to the forward-reverse transmission mechanism through a transmission device, the other end of the motor is connected to the vacuum pump, when the motor rotates forward, the upper rotary bag conveying mechanism is driven to convey bags by driving the forward-reverse transmission mechanism to act, when the motor rotates reversely, the upper rotary bag conveying mechanism stops conveying bags, and the motor drives the vacuum pump to work to vacuumize the sealing cavity.

[0012] Further, the forward-reverse transmission mechanism comprises an internal ratchet gear ring and a pawl disc arranged in the internal ratchet gear ring, the motor drives the pawl disc to rotate forwardly and reversely, and the internal ratchet gear ring is connected to the upper rotary bag conveying mechanism through a transmission mechanism.

[0013] Further, the forward-reverse transmission mechanism further comprises a hollow shaft penetrating through the side wall of the sealing cavity, the pawl disc is arranged on the hollow shaft, the other end of the hollow shaft extends into a transition cavity, and the air inlet of the vacuum pump is in communication with the transition cavity.

[0014] Further, the transmission mechanism comprises a double-row gear connected to the internal ratchet gear ring, a first driven gear and a second driven gear meshing with different gear rings of the double-row gear, and the first driven gear and the second driven gear are coaxially arranged with corresponding synchronous pulleys of the upper rotary bag conveying mechanism.

[0015] Further, the heat sealing head further comprises a heat sealing workbench assembly arranged below the upper rotary bag conveying mechanism, the heat sealing workbench assembly comprises an elastic floating base, two groups of synchronous driven belt conveying mechanisms arranged on the elastic floating base, and an elastic floating heating assembly arranged between the two groups of driven belt conveying mechanisms, and the driven belt conveying mechanisms are synchronously moved with the upper rotary bag conveying mechanism through a gear transmission mechanism.

[0016] Further, the elastic floating heating assembly has a convex heat sealing head, and the heat sealing head has corresponding synchronous pulleys meshing with synchronous belts of the upper rotary bag conveying mechanism.

[0017] As can be seen from the above technical solutions, the application has the following advantages:

[0018] 1. The sealing ring used in the application has a thin tongue part, is easy to deform, abuts more closely, and has good sealing performance.

[0019] 2. The sealing ring used in the application is flat mouth e-shaped, which is installed with the pressing ring to make the installation firm and not easy to fall off, and does not change the structure of the cartridge body.

[0020] 3. The motor, vacuum pump and forward and reverse transmission mechanism are integrated in the application, the forward and reverse rotation of the motor is used to control the bag feeding and vacuum pumping to work independently, the structure is compact and small in size, the bag feeding function and the vacuum pumping function share the same motor, which reduces the cost of the equipment, and the bag feeding function and the vacuum pumping function can only be selected to perform, which ensures that the bag can keep stable position during vacuum pumping, and the vacuum pumping effect is controllable.

[0021] 4. The two groups of synchronous belt transmission mechanisms are used in the application to make the bag move synchronously with the synchronous belt, which makes the bag move reliably, and the bag and the heat sealing head always keep face-to-face contact, which makes the bag not easy to deflect during movement, and the sealing line is neat, beautiful and reliable.

[0022] 5. Two heat sealing heads are provided in the application to double seal the bag body, which makes the sealing more firm.

[0023] 6. The vacuum pump is used to provide air source for the lifting cylinder in the application, which makes the energy be reasonably utilized, saves the air supply system and is more convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings, and their description, are presented to explain the application and are not intended to limit the application unduly.

[0025] Figure 1 Structure diagram of the first structure of the application Figure 1 .

[0026] Figure 2 Structure diagram of the first structure of the application Figure 2 .

[0027] Figure 3 Structure diagram of the first structure of the application Figure 3 .

[0028] Figure 4 Structure diagram of the second structure of the application Figure 1 .

[0029] Figure 2 Structure diagram of the second structure of the application Figure 6 .

[0030] Figure 7 Internal structure diagram of the application.

[0031] Figure 6Fig. 1 is a schematic view of the structure of the present application. Figure 8 Fig. 2 is a schematic view of the structure of the present application.

[0032] Figure 9 Fig. 3 is a schematic view of the structure of the present application.

[0033] Figure 10 Fig. 4 is a schematic view of the structure of the present application.

[0034] Figures 1 to 10 Fig. 5 is a schematic view of the structure of the present application.

[0035] BRIEF DESCRIPTION OF THE DRAWINGS 1 - frame; 2 - upper bin body; 3 - lower bin body; 4 - lifting driving mechanism; 5 - inner fixing frame; 6 - upper rotary bag conveying mechanism; 61 - synchronous pulley; 62 - synchronous belt; 63 - wheel shaft; 7 - heat sealing workbench assembly; 71 - fixed seat; 72 - elastic floating seat; 73 - driven belt conveying 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 gear ring; 95 - pawl disc; 96 - hollow shaft; 10 - motor; 11 - vacuum pump; 12 - transition cavity; sealing ring 20; thin tongue 201, bottom strip 202, side pressing edge 203, backfolding intermediate layer 204, thick wall part 205, worm gear mechanism 30; pressing ring 40, ear arm 401. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with embodiments and drawings. Herein, the schematic embodiments of the present application and their descriptions are used to explain the present application, but not as a limitation to the present application.

[0037] Reference Figure 1 As Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 7As shown, the embodiment provides a vertical bag sealing machine, which comprises two warehouse bodies capable of approaching each other to form a sealing cavity, a heat sealing head located in the sealing cavity, and the heat sealing head comprises an upper rotary bag conveying mechanism 6. A sealing ring 20 is arranged on the sealing end face of the warehouse body, and the sealing ring 20 has an outwardly bulging thin tongue part 201. The two warehouse bodies are an upper warehouse body 2 and a lower warehouse body 3. When the upper warehouse body 2 and the lower warehouse body 3 are closed by approaching each other, the thin tongue part 201 of the upper sealing ring 20 and the thin tongue part 201 of the lower sealing ring 20 are in close contact. Since the thin tongue part 201 is in a bulging shape, extrusion deformation can be generated when the thin tongue part 201 is in close contact. On the one hand, the contact is more closely, the sealing performance of the joint of the upper warehouse body 2 and the lower warehouse body 3 is better, and the sealing performance of the sealing cavity is better, so that the efficiency and effect of vacuumizing can be improved. On the other hand, the extrusion deformation of the thin tongue part 201 can generate a certain buffer, so that the impact when the upper warehouse body 2 and the lower warehouse body 3 are in contact is small.

[0038] As shown in the figure, Figure 1 A specific structure of the sealing ring 20 is that the cross section of the sealing ring 20 is in a flat mouth e shape, the top of the sealing ring 20 is the thin tongue part 201, and the thin tongue part 201 and the backfolding intermediate layer 204 form an extrudable cavity.

[0039] Specifically, the installation mode of the sealing ring 20 can be that the sealing ring 20 is in close contact with the sealing end face of the warehouse body, and the sealing ring 20 is fixed by using a screw to pass through the bottom strip 202 of the sealing ring 20 and connect with the warehouse body; or the flat mouth of the sealing ring 20 faces the outer side, and the pressing ring 40 connected with the warehouse body has a limiting ring part inserted into the flat mouth to limit and fix the sealing ring 20. The flat mouth is located between the backfolding intermediate layer 204 and the bottom strip 202.

[0040] When the pressing ring 40 is used to fix the sealing ring 20 in the flat mouth e shape, the pressing ring 40 comprises a pressing ring part in an L-shaped cross section. One side of the pressing ring part is a limiting ring part, and the other side of the pressing ring part is provided with a plurality of ear arms 401 capable of being folded. The ear arms 401 can be hooked and connected with the eave part of the warehouse body after being folded, so that the sealing ring 20 is convenient to disassemble and assemble. The included angle between the two sides of the pressing ring 40 is ≤85°, the pressing ring 40 is in close contact with the outer circumferential surface of the eave part of the warehouse body, the bottom strip 202 is pressed tightly, and the sealing ring 20 is installed stably.

[0041] In order to make the sealing ring 20 in the flat mouth e shape more reliable in installation, the bottom surface of the bottom strip 202 has a convex arc surface part and a side pressing edge 203 located on one side of the convex arc surface part. The sealing surface of the warehouse body is provided with a limiting surface in close contact with the bottom surface of the bottom strip 202. The inner side surface of the bottom strip 202 in contact with the pressing ring 40 is in a bevel shape. The cooperation of the bottom surface of the bottom strip 202 and the limiting surface and the cooperation of the bottom strip 202 and the pressing ring 40 make the sealing ring 20 not easy to move after being installed, so that the installation is more stable.

[0042] Another specific structure of the sealing ring 20 is that the sealing ring 20 is in a U-shaped form, the sealing ring 20 further comprises thick wall portions connected to both sides of the thin tongue portion 201, and the sealing end surface of the bin body is provided with a limiting groove for inserting the thick wall portions. The thickness difference between the thick wall portions and the thin tongue portion 201 forms a cavity that can be extruded, the thin tongue portion 201 is arranged to make the sealing ring 20 easy to deform, and the thick wall portions are arranged to make the mounting and fixing portion of the sealing ring 20 not easy to deform, so that the sealing ring 20 is stably mounted.

[0043] In the present application, preferably, the two thick wall portions 205 are inserted into the same limiting groove, so that the limiting groove is easy to process and convenient.

[0044] As shown in Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Figure 9 , Figure 10 and Figures 1 to 3 , the vertical bag sealing machine further comprises a forward and reverse transmission mechanism 9 connected with the upper rotary bag conveying mechanism 6, a double-head motor 10, and a vacuum pump 11. One end of the motor 10 is directly connected with the forward and reverse transmission mechanism 9 or connected with the forward and reverse transmission mechanism 9 through a transmission device, and the other end of the motor 10 is connected with the vacuum pump 11. When the motor 10 rotates forward, the upper rotary bag conveying mechanism 6 is driven to move by driving the forward and reverse transmission mechanism 9 to realize bag conveying. When the motor 10 rotates reversely, the upper rotary bag conveying mechanism 6 stops conveying bags, and the motor 10 drives the vacuum pump 11 to work to vacuumize the sealing cavity. In the present application, compared with the independent driving system and the vacuum suction in the prior art, which are arranged independently, the bag conveying driving and the vacuum starting are controlled by the forward and reverse rotation of the motor 10, so that the device structure is more compact and the volume is smaller.

[0045] In the present embodiment, the upper bin body 2 is fixedly connected with the rack 1, the lower bin body 3 is slidably connected with the rack 1, and the lower bin body 3 is connected with the lifting driving mechanism 4 arranged on the rack 1. The inner fixing frame 5 is arranged in the upper bin body 2 and extends into the lower bin body 3. The heat sealing head is arranged on the inner fixing frame 5. The sealing strips 20 capable of resisting each other to make the sealing performance of the sealing cavity better are arranged on the lower opening of the upper bin body 2 and the upper opening of the lower bin body 3. When the upper bin body 2 and the lower bin body 3 are separated, the bag body enters the heat sealing head through the gap between the upper bin body 2 and the lower bin body 3. The lifting driving mechanism 4 is a lifting cylinder, an oil cylinder, a linear motor, a screw nut mechanism, or an electromagnetic valve.

[0046] As shown in Figure 4 , preferably, the lifting driving mechanism 4 is a screw nut mechanism in which the screw rod is connected with the corresponding motor.

[0047] As shown in Figure 5 ,Figure 5 As shown in the drawings, preferably, the lifting driving mechanism 4 in the present application 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 a double-gas-path electromagnetic control valve is arranged on the pipeline.

[0048] When the forward-reverse transmission mechanism 9 is connected to the driven belt conveying mechanism 73 of the heat sealing head, the upper bin body 2 can also be arranged to be movable and the lower bin body 3 is fixed.

[0049] In the present application, the forward-reverse transmission mechanism 9 can be a one-way bearing, which utilizes the one-way rotation function of the one-way bearing to meet the one-way movement of the upper rotary bag conveying mechanism 6. However, the one-way bearing has limited torque on one hand and high cost on the other hand.

[0050] In order to meet the large torque, the forward-reverse transmission mechanism 9 can be arranged to be a gear transmission mechanism. Figures 1 to 3 As shown in the drawings, preferably, the forward-reverse transmission mechanism 9 in the present embodiment includes an internal ratchet gear ring 94 and a pawl disc 95 arranged in the internal ratchet gear ring 94, the motor 10 drives the pawl disc 95 to rotate forward and reversely, and the internal ratchet gear ring 94 is connected to the upper rotary bag conveying mechanism 6 through a transmission mechanism. When the motor 10 drives the pawl disc 95 to rotate forward, the internal ratchet gear ring 94 is driven to rotate, and then the upper rotary bag conveying mechanism 6 is driven to move to convey the bag by overcoming a certain damping force. When the motor 10 drives the pawl disc 95 to rotate reversely, the upper rotary bag conveying mechanism 6 is kept in a stationary state by the contact friction between the upper rotary bag conveying mechanism 6 and the elastic floating heating assembly 74 or the elastic damping mechanism arranged on the frame 1 and capable of preventing the upper rotary bag conveying mechanism 6 from rotating freely, so that the bag is kept in a stable position in the vacuum state, and at the same time, the motor 10 drives the vacuum pump 11 to perform the vacuum suction action on the sealed cavity to complete the vacuum suction work.

[0051] In order to make the structure more compact, the forward-reverse transmission mechanism 9 further includes a hollow shaft 96 penetrating the side wall of the sealed cavity, the pawl disc 95 is arranged 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 through a pipeline, and the motor 10 is connected to the hollow shaft 96 through a gear transmission structure or a chain transmission structure. The use of this structure can shorten the pipeline distance and avoid reprocessing the vacuum suction hole on the upper bin body 2 or the lower bin body 3, which is more convenient for connecting the vacuum suction pipeline. When the vacuum suction pipe is a hose, the length of the vacuum suction pipe is short, the strength is increased, and the deformation is not easy, so that the vacuum suction pipe is not easy to be affected by the deformation to affect the vacuum suction efficiency.

[0052] In the embodiment, the transmission device is preferably a speed reducer, the motor 10 is connected with the hollow shaft 96 through the speed reducer, the speed reducer is located in the transition cavity 12, and the sealing performance of the transition cavity 12 can reduce noise and protect the speed reducer, so that the service life of the speed reducer is not affected by moisture or dust in the air.

[0053] Specifically, the input end of the speed reducer is connected with the motor 10, the output end of the speed reducer is connected with the hollow shaft 96, and the hollow shaft 96 penetrates the speed reducer to connect the air outlet pipe of the hollow shaft 96 with the transition cavity 12, so that the output shaft of the motor 10 and the hollow shaft 96 are parallel or perpendicular to each other by using the speed reducer.

[0054] Specifically, as shown in Figures 4 to 5 , when the speed reducer is a combination structure of a worm and gear mechanism 30 and a spur gear set, the output shaft of the motor 10 and the hollow shaft 96 are perpendicular to each other, so that the structure is more compact; as shown in Figure 6 , when the speed reducer is a spur gear set, the output shaft of the motor 10 and the hollow shaft 96 are parallel to each other, and the cost is low.

[0055] The transmission device can also be a constant velocity gear transmission device or a chain transmission device.

[0056] The vacuum pump 11 can also be arranged at the end or side of the motor 10 through a corresponding transmission mechanism.

[0057] In the application, the upper rotary bag conveying mechanism 6 can be a roller structure in the prior art.

[0058] In the embodiment, the upper rotary bag conveying mechanism 6 is preferably a belt conveying mechanism, which uses face contact to press and convey the bag, so that, compared with the existing line contact, the bag can be prevented from deviating due to uneven force during movement, and the appearance and reliability of the seal are affected.

[0059] As shown in Figure 8 , Figure 9 , Figure 10 and ​ , in the embodiment, the transmission mechanism includes a double-row gear 91 arranged on the hollow shaft 96 and synchronously rotating 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 corresponding synchronous pulleys 61 of the upper rotary bag conveying mechanism 6 through corresponding shafts 63. By using the structure, the first driven gear 92 and the second driven gear 93 can be synchronously turned, and the transmission power of the upper rotary bag conveying mechanism 6 can be increased by synchronously driving the two synchronous pulleys 61 to move, so that the upper rotary bag conveying mechanism 6 starts smoothly and quickly, and the force on both sides of the double-row gear 91 is balanced, so that the hollow shaft 96 is not easily deformed by long-term unidirectional force.

[0060] In the present application, the transmission mechanism can also be a chain transmission mechanism or a bevel gear assembly.

[0061] In the present embodiment, the heat sealing head further comprises a heat sealing workbench assembly 7 located below the upper rotary bag conveying mechanism 6, the heat sealing workbench assembly 7 comprises a fixed seat 71, an elastic floating seat 72 slidingly arranged on the fixed seat 71, two groups of synchronously moving driven belt conveying mechanisms 73 arranged on the elastic floating seat 72, and an elastic floating heating assembly 74 slidingly arranged on the elastic floating seat 72 between the two groups of driven belt conveying mechanisms 73, the driven belt conveying mechanisms 73 are synchronously moved with the upper rotary bag conveying mechanism 6 through a gear transmission mechanism 8.

[0062] Specifically, springs or other elastic members are arranged between the elastic floating seat 72 and the fixed seat 71 and between the elastic floating heating assembly 74 and the fixed seat 71, so that the elastic floating seat 72 and the elastic floating heating assembly 74 are automatically upwardly reset under the action of the springs or other elastic members, the elastic floating seat 72 and the elastic floating heating assembly 74 can adapt to bags of different thicknesses for sealing by automatic elastic resetting, the bag is clamped and conveyed in a form that the lower conveying belt of the driven belt conveying mechanism 73 reliably abuts against the synchronous belt 62 of the upper rotary bag conveying mechanism 6, the bag moves along with the movement of the belt during conveying without sliding, thereby reliable conveying, the lower conveying belt and the synchronous belt 62 clamp the bag from the surface to surface to clamp and position the bag, so that the bag is not easy to deflect during conveying, the sealing is beautiful, neat, and the sealing position has high reliability.

[0063] Preferably, in the present application, the driven belt conveying mechanism 73 and the upper rotary bag conveying mechanism 6 are both synchronous belt transmission mechanisms, which can avoid the influence of anti-skid on the conveying efficiency of the bag,

[0064] In the present embodiment, the elastic floating heating assembly 74 has a protruding heat sealing head 75, the upper portion of the heat sealing head 75 has a corresponding synchronous pulley 61 engaged with the synchronous belt 62 of the upper rotary bag conveying mechanism 6, and the heat sealing head 75 is in contact with the inner annular surface of the lower conveying 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, and the synchronous pulley 61 cooperates with the heat sealing head 75 to enable the bag to avoid up and down shaking with the upper and lower belts when passing through the heat sealing head 75, so that the heat sealing effect is stable, and the upper belt surface of the driven belt conveying mechanism 73 and the lower belt surface of the synchronous belt 62 between the two end synchronous pulleys 61 always maintain a stable extrusion shape at the heat sealing position, so that the bag moves along with the movement of the driven belt after the heat sealing effect, thereby reliable conveying.

[0065] The elastic floating heating assembly 74 preferably has two protruding heat sealing heads 75 arranged in sequence along the bag conveying direction, the upper part of the heat sealing heads 75 is provided with corresponding synchronous pulleys 61 engaged with the synchronous belt 62 of the upper rotary bag conveying mechanism 6, the two heat sealing heads 75 are used to seal the bag twice, and the double sealing can make the sealing of the bag more firm.

[0066] Specifically, the two heat sealing heads 75 are located on the same horizontal straight line, which ensures that the heat sealing after double sealing is neat and beautiful.

[0067] In the application, the elastic floating heating assembly 74 can 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 realize double sealing.

[0068] In the embodiment, two detection switches are arranged on the heat sealing head, and the heat sealing head 75 is located between the two detection switches, which can automatically detect the position of the bag through the detection switches, and is more rapid and accurate than manual judgment.

[0069] In the application, the detection switch is a micro switch or a photoelectric switch.

[0070] When the detection switch is a micro switch, two micro switches are arranged on the elastic floating seat 72 or the elastic floating heating assembly 74, and the heat sealing head 75 is located between the two micro switches, which detects the position of the bag by pressing the micro switch through the bag.

[0071] In the embodiment, the detection switch is preferably a photoelectric switch.

[0072] In the embodiment, one installation mode of the detection switch is that two photoelectric switches arranged in sequence along the bag conveying direction are arranged on the upper bin body 2, and the photoelectric switches are located in front of the heat sealing head 75, which detects the position of the bag by shielding or reflecting the light of the photoelectric switch through the bag.

[0073] In the embodiment, another installation mode of the detection switch is that two photoelectric switches are arranged 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, which detects the position of the bag by shielding or reflecting the light of the photoelectric switch through the bag.

[0074] In the application, the photoelectric switch is preferably arranged on the upper bin body 2.

[0075] When the lifting drive mechanism 4 is a lifting cylinder, in use, the upper bin body 2 and the lower bin body 3 are first in a separated state, when the bag body passes the front photoelectric switch, the signal started by the front photoelectric switch controls the motor 10 to rotate forward and the heat sealing head 75 to start heating, the motor 10 rotates forward to make the upper rotary bag conveying mechanism 6 and the driven belt conveying mechanism 73 move to convey the bag, and the bag sealing work starts, when the bag body passes the rear photoelectric switch, the photoelectric switch returns a signal, at the same time, the motor 10 is controlled to rotate reversely to start the vacuum pump 11 and the double gas path electromagnetic control valve to switch to a state of supplying gas to the lifting cylinder to make the lower bin body 3 rise, the vacuum pump 11 supplies gas to the lifting cylinder while vacuumizing the working cavity, and the lower bin body 3 rises to close with the upper bin body 2, when the gas pressure of the suction cavity of the lifting cylinder reaches the set pressure, the double gas path electromagnetic control valve jumps to another gas path (the discharged gas is discharged to the environment), when the suction vacuum reaches the pressure set by the negative pressure valve, the double gas path electromagnetic control valve is in a corresponding state (supplying gas to the lifting cylinder), the lifting cylinder moves to make the lower bin body retreat, at the same time, the motor 10 is controlled to rotate forward to convey the bag, at this time, the remaining bag sealing work is sealed according to the time set by the program for the last bag sealing to be completed, after the bag sealing is completed, the equipment stops and waits for work.

[0076] When the lifting drive mechanism 4 is a screw nut mechanism, the bag sealing work starts, when the bag body passes the rear photoelectric switch, the photoelectric switch returns a signal, at the same time, the motor 10 is controlled to rotate reversely to start the vacuum pump 11 and the lifting drive mechanism 4 to control the lower bin body 3 to rise, the lower bin body 3 rises to close with the upper bin body 2 to form a sealed cavity, when the suction vacuum reaches the pressure set by the negative pressure valve, the lifting drive mechanism 4 controls the lower bin body 3 to descend and retreat, at the same time, the motor 10 is controlled to rotate forward to convey the bag, at this time, the remaining bag sealing work is sealed according to the time set by the program for the last bag sealing to be completed, after the bag sealing is completed, the equipment stops and waits for work.

[0077] The above only describes the preferred embodiments of the present application and is not used to limit the present application, the embodiments of the present application can have various changes and variations for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vertical bag sealing machine, comprising two chambers that can be brought close together to form a sealed cavity, and a heat sealing head located within the sealed cavity, wherein the heat sealing head includes an upper bag conveying mechanism (6), characterized in that, A sealing ring (20) is provided on the sealing end face of the chamber body, and the sealing ring (20) has a thin tongue (201) that bulges outward.

2. The vertical bag sealing machine according to claim 1, characterized in that, The cross-section of the sealing ring (20) is flat-mouth e-shaped.

3. The vertical bag sealing machine according to claim 2, characterized in that, The flat opening of the sealing ring (20) faces outward, and the pressure ring (40) connected to the chamber body has a limiting ring portion that is inserted into the flat opening.

4. The vertical bag sealing machine according to claim 3, characterized in that, The pressure ring (40) includes a pressure ring portion with an L-shaped cross-section. One side of the pressure ring portion is a limiting ring portion, and the other side of the pressure ring portion is provided with multiple foldable ear arms (401). After the ear arms (401) are folded, they can be hooked and connected to the eaves of the cabin body.

5. The vertical bag sealing machine according to claim 4, characterized in that, The bottom surface of the sealing ring (20) has a convex arc surface and a side pressing edge (203) located on one side of the convex arc surface. The sealing surface of the chamber body is provided with a limiting surface that fits against the bottom surface of the sealing ring (20).

6. The vertical bag sealing machine according to claim 1, 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.

7. The vertical bag sealing machine according to claim 6, 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.

8. The vertical bag sealing machine according to claim 7, 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).

9. The vertical bag sealing machine according to claim 7, characterized in that, 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).

10. The vertical bag sealing machine according to claim 7, 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).

11. The vertical bag sealing machine according to claim 10, 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).

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