Handheld film sealer

Abstract

The application relates to a handheld film sealing machine applied to tobacco stack film sealing operation, and through cooperation of a universal wheel set, an upper handheld handle, a side handheld handle, an upper film sealing chain, a lower film sealing chain and a machine body, the device structure of the handheld film sealing machine is optimized, different operation positions of the two handheld handles are provided, cumbersome operation of needing to hold the device and rotating by 90 degrees of a traditional film sealing machine is eliminated, a film sealing process is simplified, and operation difficulty is reduced; the different operation positions of the two handheld handles cooperate with appropriate support of the universal wheels, the stability of an operator in long-time use is improved, operation mistakes caused by hand fatigue are reduced, film sealing quality is improved, film sealing unevenness or operation mistakes caused by device sliding are avoided, film sealing efficiency is improved, the film sealing machine is suitable for scenes needing frequent movement and continuous operation, the film sealing operation time is effectively shortened, physical burden of an operator is reduced, and the film sealing machine is especially suitable for keeping high efficiency and stability in long-time operation.

Description

Technical Field

[0001] This application relates to the field of handheld sealing tools, and in particular to handheld sealing machines. Background Technology

[0002] New tobacco leaves need to be stored in tobacco warehouses for maintenance. During the large-scale storage of new tobacco leaves, the maintenance stage employs an oxygen-barrier method for pest control. This mainly involves creating a low-oxygen or anaerobic environment, causing pests to die due to lack of oxygen. Maintenance personnel need to seal and stack the new tobacco leaves. Specifically, the stacking process includes: placing a bottom film on the ground, stacking the tobacco boxes in a specific order, placing them on the bottom film, adding an oxygen absorber, and then covering the tobacco boxes with a pre-sealed film that integrates the side and top films. Finally, the side and bottom films are sealed to create a sealed environment for the tobacco stack.

[0003] However, existing sealing operations, also known as palletizing operations, have the following problems.

[0004] 1. Complex and inefficient operation: The current sealing operation requires three people to work together. One person arranges the side film and bottom film to make them flush; another person uses a handheld hot melt sealing machine to seal the film; due to insufficient lighting in the operating area of ​​the storage area, a third person is needed to carry a lighting device and assist in arranging the film. In other words, the entire process requires the cooperation of multiple people and is cumbersome.

[0005] 2. Inadequate equipment design: The existing handheld hot melt sealing machine weighs 5KG, which is relatively heavy. Furthermore, the handheld part is opposite the sealing part, while the sealing area is located to the side of the handheld part. Operators need to rotate the machine 90 degrees to perform the sealing operation, which not only increases the difficulty of operation but also easily leads to malfunctions due to fatigue.

[0006] 3. High technical requirements and numerous safety hazards: Sealing operations require a high level of technical skill from operators. Improper operation can affect the sealing quality and may lead to the following problems: air leakage due to excessively low sealing temperature; melting of the sealant due to excessively high sealing temperature; film jamming, film rolling, or film breakage due to lack of proficiency in operation; and the risk of burns to the arms during operation.

[0007] Furthermore, during the period of large-scale storage of new tobacco, personnel are scarce, and traditional sealing equipment is not conducive to improving the efficiency of modified atmosphere packaging (MAP) sealing operations, and poses significant safety hazards and operational difficulties. In addition, poor sealing quality will lead to air leakage, which will result in repacking and re-application of chemicals during the curing stage, causing significant economic losses. Utility Model Content

[0008] Therefore, it is necessary to provide a handheld sealing machine.

[0009] One embodiment of this application is a handheld sealing machine, which includes a set of casters, an upper hand handle, a side hand handle, an upper sealing chain, a lower sealing chain, and a machine body;

[0010] The fuselage has a first side, a second side, a third side, and a fourth side connected in sequence, with the first side connected to the fourth side, the first side opposite to the third side, and the second side opposite to the fourth side.

[0011] The upper sealing chain and the lower sealing chain are respectively disposed on the machine body, and a sealing channel is formed between the upper sealing chain and the lower sealing chain;

[0012] The upper hand handle is connected to the body on the second side;

[0013] The omnidirectional wheel assembly is connected to the fuselage on the third side;

[0014] The side hand handle is connected to the body on the fourth side.

[0015] The aforementioned handheld sealing machine is used for sealing tobacco stacks. Through the coordination of the caster assembly, top and side hand handles, upper and lower sealing chains, and the machine body, the machine's structure is optimized. It provides two different operating positions for the two hand handles. On one hand, this eliminates the cumbersome operation of traditional sealing machines, which require lifting and rotating the device 90 degrees, simplifying the sealing process and reducing operational difficulty. On the other hand, the different operating positions of the two hand handles, combined with the appropriate support of the caster, improve the operator's stability during prolonged use, thereby reducing operational errors caused by hand fatigue and ultimately improving... The improved sealing quality avoids uneven sealing or operational errors caused by equipment slippage. Furthermore, the reduced operational difficulty significantly increases sealing efficiency, making it particularly suitable for scenarios requiring frequent movement and continuous operation. This effectively shortens sealing time and reduces the physical burden on operators, making it especially suitable for maintaining high efficiency and stability during long-term operations. Moreover, the reduced operational difficulty minimizes safety hazards caused by improper equipment operation. Operators no longer need to perform complex lifting and rotating movements, reducing the probability of accidents such as burns and film jamming, thus improving operational safety.

[0016] In some embodiments, the handheld sealing machine further includes a temperature regulating heater connected to the body on the fourth side, and the temperature regulating heater is configured to heat the sealing channel between the upper sealing chain and the lower sealing chain.

[0017] In some embodiments, the handheld sealing machine further includes a motor connected to the body on the fourth side, and the motor drives the upper sealing chain and the lower sealing chain.

[0018] In some embodiments, the motor and the temperature-regulating heater are respectively located on both sides of the side handle.

[0019] In some embodiments, the first side is parallel to the third side, the second side is parallel to the fourth side, and the first side is perpendicular to the second side.

[0020] In some embodiments, the first length direction of the upper hand handle is parallel to the second length direction of the side hand handle.

[0021] In some embodiments, the housing has a heating port on the first side, the heating port facing the sealing groove.

[0022] In some embodiments, the upper sealing chain and the lower sealing chain are respectively connected to the body on the first side; or...

[0023] The upper sealing chain and the lower sealing chain are located inside the machine body.

[0024] In some embodiments, the caster assembly includes at least three casters.

[0025] In some embodiments, the caster assembly includes four casters, namely a first caster, a second caster, a third caster, and a fourth caster, and the four casters are respectively located on at least two straight lines.

[0026] In some embodiments, the first omnidirectional wheel and the fourth omnidirectional wheel are located between the second omnidirectional wheel and the first side of the third side.

[0027] The second and third omnidirectional wheels are located between the first omnidirectional wheel and the second side of the third side.

[0028] The distance between the first swivel wheel and the fourth swivel wheel is greater than the distance between the second swivel wheel and the third swivel wheel. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of an embodiment of the handheld sealing machine described in this application.

[0031] Figure 2 for Figure 1 The illustrated embodiment is shown in the following diagram.

[0032] Figure 3 for Figure 1 A partial structural schematic diagram of another direction of the embodiment shown.

[0033] Figure 4 for Figure 3 Another schematic diagram of the embodiment shown.

[0034] Figure 5 for Figure 3 Another schematic diagram of the embodiment shown.

[0035] Reference numerals: 1. Film; 10. Handheld sealing machine; 2. Caster assembly; 21. First caster; 22. Second caster; 23. Third caster; 24. Fourth caster; 31. Top hand handle; 32. Temperature regulating heater; 33. Side hand handle; 34. Motor; 35. First length direction; 36. Second length direction; 4. Heating port; 41. Upper sealing chain; 42. Lower sealing chain; 43. Sealing channel; 5. Machine body; 51. First side; 52. Second side; 53. Third side; 54. Fourth side; 55. First side; 56. Second side. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0041] This application discloses a handheld sealing machine, which includes some or all of the technical features of the following embodiments; that is, the handheld sealing machine includes some or all of the following structures. In one embodiment of this application, a handheld sealing machine includes a set of universal wheels, an upper hand handle, a side hand handle, an upper sealing chain, a lower sealing chain, and a body; the body has a first side, a second side, a third side, and a fourth side connected in sequence, and the first side is connected to the fourth side, the first side is opposite to the third side, and the second side is opposite to the fourth side; the upper sealing chain and the lower sealing chain are respectively disposed on the body, and a sealing channel is formed between the upper sealing chain and the lower sealing chain; the upper hand handle is connected to the body on the second side; the universal wheel set is connected to the body on the third side; and the side hand handle is connected to the body on the fourth side. The aforementioned handheld sealing machine is used for sealing tobacco stacks. Through the coordination of the caster assembly, top and side hand handles, upper and lower sealing chains, and the machine body, the machine's structure is optimized. It provides two different operating positions for the two hand handles. On one hand, this eliminates the cumbersome operation of traditional sealing machines, which require lifting and rotating the device 90 degrees, simplifying the sealing process and reducing operational difficulty. On the other hand, the different operating positions of the two hand handles, combined with the appropriate support of the caster, improve the operator's stability during prolonged use, thereby reducing operational errors caused by hand fatigue and ultimately improving... This improves sealing quality, thus avoiding uneven sealing or operational errors caused by equipment slippage. Furthermore, by reducing operational difficulty, sealing efficiency is significantly increased, making it particularly suitable for scenarios requiring frequent movement and continuous operation. This effectively shortens sealing time and reduces the physical burden on operators, making it especially suitable for maintaining high efficiency and stability during long-term operations. Moreover, the reduced operational difficulty minimizes safety hazards caused by improper equipment operation. Operators no longer need to perform complex lifting and rotating movements, reducing the probability of burns, film jamming, and other accidents, thereby improving operational safety. The following section will combine... Figures 1 to 5 The handheld sealing machine will be described in detail below.

[0042] In some embodiments, a handheld sealing machine 10, such as Figure 1 and Figure 3As shown, it includes a caster wheel assembly 2, an upper hand handle 31, a side hand handle 33, an upper sealing chain 41, a lower sealing chain 42, and a body 5. The body 5 has a first side 51, a second side 52, a third side 53, and a fourth side 54 connected in sequence, with the first side 51 connected to the fourth side 54, the first side 51 facing away from the third side 53, and the second side 52 facing away from the fourth side 54. The upper sealing chain 41 and the lower sealing chain 42 are respectively disposed on the body 5, and a sealing channel 43 is formed between the upper sealing chain 41 and the lower sealing chain 42. The upper hand handle 31 is connected to the body 5 on the second side 52. The caster wheel assembly 2 is connected to the body 5 on the third side 53. The side hand handle 33 is connected to the body 5 on the fourth side 54. The aforementioned handheld sealing machine 10 is used for sealing tobacco stacks. Through the coordination of the caster assembly 2, the upper hand handle 31, the side hand handle 33, the upper sealing chain 41, the lower sealing chain 42, and the machine body 5, the machine structure of the handheld sealing machine 10 is optimized. It provides two different operating positions for the two hand handles. On the one hand, it eliminates the cumbersome operation of traditional sealing machines that require lifting and rotating the equipment 90 degrees, simplifying the sealing process and reducing operational difficulty. On the other hand, the different operating positions of the two hand handles, combined with the appropriate support of the casters, help improve the stability of the operator during prolonged use, thereby reducing hand fatigue and operational difficulties. This reduces operational errors and improves sealing quality, thus avoiding uneven sealing or operational mistakes caused by equipment slippage. Furthermore, the reduced operational difficulty significantly improves sealing efficiency, making it particularly suitable for scenarios requiring frequent movement and continuous operation. It effectively shortens sealing time and reduces the physical burden on operators, making it especially suitable for maintaining high efficiency and stability during long-term operations. Moreover, the reduced operational difficulty minimizes safety hazards caused by improper equipment operation. Operators no longer need to perform complex lifting and rotating movements, reducing the probability of accidents such as burns and film jamming, thereby improving operational safety.

[0043] In each embodiment, such as Figure 1 and Figure 3As shown, the fuselage 5 has a first side 51, a second side 52, a third side 53, and a fourth side 54 connected in sequence. The first side 51 is connected to the fourth side 54, the first side 51 is opposite to the third side 53, and the second side 52 is opposite to the fourth side 54. In some embodiments, the first side 51 is parallel to the third side 53, the second side 52 is parallel to the fourth side 54, and the first side 51 is perpendicular to the second side 52. As an example, the fuselage 5 has a cuboid shape, or the fuselage 5 has a rectangular cross-section. This structural design has two advantages. First, the regular parallel or perpendicular structure of the four sides—first side 51, second side 52, third side 53, and fourth side 54—provides a standardized installation benchmark for components such as the caster wheel assembly 2, the two hand handles, and the two sealing chains. This makes the distribution of functional modules on the body 5 more regular and orderly, ensuring the stability of the core structure, the sealing channel 43. The two hand handles include an upper hand handle 31 and a side hand handle 33; the two sealing chains include an upper sealing chain 41 and a lower sealing chain 42. Second, the regular geometric shape of the body 5 facilitates gripping and movement by the operator. Combined with the hand handles on different sides, including the upper hand handle 31 on the second side 52 and the side hand handle 33 on the fourth side 54, it can adapt to multi-angle operation needs, avoiding the inconvenience or effort caused by the irregular structure of traditional equipment. On the other hand, the parallel or vertical side design makes the overall structure of the machine body 5 more symmetrical and balanced, which can reduce the shaking caused by the shift of the center of gravity during the sealing operation. Especially during the movement of the universal wheel group 2, the regular shape can reduce the risk of machine body tilting and ensure the stable delivery and uniform sealing of the film 1 by the two sealing chains.

[0044] In each embodiment, such as Figure 1 and Figure 2As shown, the upper sealing chain 41 and the lower sealing chain 42 are respectively disposed on the machine body 5, and a sealing channel 43 is formed between the upper sealing chain 41 and the lower sealing chain 42. In some embodiments, the upper sealing chain 41 and the lower sealing chain 42 are respectively connected to the machine body 5 on the first side 51 to cooperate in clamping the film from the side of the machine body 5. As an example, the upper sealing chain 41 and the lower sealing chain 42 are used together to complete key actions such as conveying, positioning, pressing and heat sealing of the sealing material, including clamping the film upward and pressing the film downward. With this structural design, on the one hand, when the two sealing chains are connected to the machine body 5 on the first side 51, the film 1 can be clamped from the side of the machine body 5, which is suitable for scenarios that require quick loading and unloading of film materials from the side, such as sealing the side of tobacco stacks, effectively improving the flexibility and stability of operation. On the other hand, when the two sealing chains are located inside the machine body 5, they can clamp the film 1 from within the machine body, facilitating the centered positioning and stable transport of the film 1. This is especially suitable for scenarios requiring high sealing precision, such as continuous sealing operations, reducing the risk of film material deviation. Furthermore, the sealing channel 43 formed by the two sealing chains can exert a double-sided clamping force on the film 1, achieving smooth transport of the film 1 through chain transmission. This avoids wrinkling or deviation of the film material due to unilateral force, thus ensuring accurate sealing position and uniform sealing effect. Moreover, the design of clamping the film from the side or inside eliminates the need for operators to manually adjust the film material position, reducing reliance on operator skill and minimizing time wasted due to manual adjustments, thereby improving sealing efficiency.

[0045] In each embodiment, such as Figure 1 and Figure 3 As shown, the upper hand handle 31 is connected to the body 5 on the second side 52, and the side hand handle 33 is connected to the body 5 on the fourth side 54. As an example, the handheld sealing machine 10 also has the universal wheel assembly 2 on the second side 52, and the protrusion height of the universal wheel assembly 2 on the second side 52 is greater than the protrusion height of the upper hand handle 31, so that the handheld sealing machine 10 can be moved under the action of the side hand handle 33. The appropriate method can be selected according to the actual situation. In some embodiments, such as... Figure 4As shown, the first length direction 35 of the upper hand handle 31 is parallel to the second length direction 36 of the side hand handle 33. This layout and orientation design allows the operator to flexibly switch grip positions according to their working posture (standing, bending, etc.) to adapt to different sealing angles and reduce fatigue caused by a single posture. Furthermore, the parallel length directions of the two hand handles ensure that the operator maintains a consistent force direction when switching grip methods, preventing machine shaking or uneven force due to sudden changes in grip direction. This is especially important during film sealing, ensuring stable clamping of the film 1 by the sealing channel 43 and improving sealing uniformity. Moreover, the parallel length directions of the two hand handles simplify the operator's muscle memory burden, allowing for multi-angle operations without frequent hand adjustments, reducing the probability of errors due to changes in operating habits. This is particularly suitable for beginners to quickly learn and improve work efficiency.

[0046] In various embodiments, the caster wheel assembly 2 is connected to the fuselage 5 on the third side 53; in some embodiments, the caster wheel assembly 2 includes at least three casters. In some embodiments, such as Figure 1 As shown, the caster assembly 2 includes four casters: a first caster 21, a second caster 22, a third caster 23, and a fourth caster 24. These four casters are located on at least two straight lines, meaning they are not on the same straight line. This structural design, on the one hand, provides stable support for the handheld sealing machine 10 by distributing multiple casters, such as the four casters, on at least two straight lines, allowing for movement without the need for manual lifting. Furthermore, the handheld sealing machine 10 can rotate 360° freely, adapting to narrow spaces or complex paths between tobacco stacks without significant adjustments to the machine's angle. This is particularly suitable for sealing scenarios requiring frequent movement, shortening equipment positioning time—a feature not found in traditional sealing equipment. On the other hand, the non-collinear distribution of multiple casters helps to form a stable support surface, which can evenly distribute the weight of the machine body 5 and reduce the risk of tilting caused by single-point force. Even when working on uneven ground, the machine body 5 can maintain its balance through the adaptive adjustment of each wheel, ensuring the stable clamping of the film 1 by the two sealing chains during the sealing process. Furthermore, the flexible rolling characteristics of the caster group 2 reduce the resistance when the equipment moves. The operator does not need to apply excessive pushing force to push the equipment, i.e., the handheld sealing machine 10. Combined with the multi-directional grip design of the two hand handles, it further reduces the physical burden of long-term operation and improves sealing efficiency, sealing stability and sealing yield.

[0047] In some of these embodiments, such as Figure 5As shown, the first universal wheel 21 and the fourth universal wheel 24 are located between the second universal wheel 22 and the first side 55 of the third side 53; the second universal wheel 22 and the third universal wheel 23 are located between the first universal wheel 21 and the second side 56 of the third side 53; the distance between the first universal wheel 21 and the fourth universal wheel 24 is greater than the distance between the second universal wheel 22 and the third universal wheel 23. This layout design, on the one hand, allows the universal wheels of the universal wheel assembly 2 to be asymmetrically distributed, enabling the handheld sealing machine 10 to achieve a smaller turning radius when turning through different wheel support combinations. This is especially suitable for flexibly adjusting direction in narrow spaces such as gaps between tobacco stacks, reducing the risk of machine collisions. On the other hand, the distance between the first universal wheel 21 and the fourth universal wheel 24 is greater than the distance between the second universal wheel 22 and the third universal wheel 23, forming a trapezoidal support structure with one wide and one narrow section. Combined with the characteristics of the universal wheels themselves, this greatly increases the support span at the front end of the machine body 5, which can effectively balance the forward thrust during the sealing operation and reduce the risk of forward tilting caused by the forward shift of the center of gravity. Especially when the handheld sealing machine 10 starts or accelerates, it can keep the machine body 5 stable and prevent the sealing channel 43 from being affected by shaking, thus ensuring sealing accuracy. Furthermore, the asymmetrical and distributed wheel layout allows each universal wheel to independently adapt to the unevenness of the ground. For example, when some universal wheels roll over obstacles, the other universal wheels remain in contact with the ground, thereby reducing the phenomenon of the handheld sealing machine 10 being suspended or stuck, ensuring continuous operation on uneven ground, and effectively reducing the problem of film material shifting or poor sealing caused by ground bumps.

[0048] In some embodiments, the handheld sealing machine 10 further includes a temperature regulating heater 32 connected to the body 5 on the fourth side 54, and the temperature regulating heater 32 is configured to heat the sealing channel 43 between the upper sealing chain 41 and the lower sealing chain 42. For example, the temperature regulating heater 32 is configured to output hot air through the heating port 4 between the upper sealing chain 41 and the lower sealing chain 42 or to heat the heating port 4, thereby heating the sealing channel 43. In other embodiments, for embodiments without a temperature regulating heater 32, the handheld sealing machine 10 may also have a pre-reserved position on the body 5 for installing the temperature regulating heater 32, which can be installed and properly connected before use. For example, the handheld sealing machine 10 uses the temperature regulating heater 32 to raise the temperature to the melting temperature range of the sealing material, such as approximately 120°C to 180°C for polyethylene and approximately 160°C to 220°C for polypropylene, causing localized melting of the film edge to achieve a heat-sealed seal. This structural design allows for several advantages. First, the temperature-regulating heater 32 directly heats the upper and lower sealing chains, rapidly increasing and maintaining their temperature. This ensures the film 1 is uniformly melted as it passes through the sealing channel 43, preventing inadequate sealing due to insufficient temperature or film damage due to excessive temperature, thus improving sealing quality stability. Second, the temperature regulation function allows for matching the heat-melting temperature requirements of films of different materials and thicknesses, such as plastic film and aluminum foil film, expanding the equipment's applicability, reducing sealing failures due to differences in film materials, and improving equipment versatility. Third, the temperature-regulating heater 32 is integrated into the fourth side 54 of the machine body, near the side handle 33, allowing operators to directly adjust the temperature while holding the equipment without additional movement or bending over. Simultaneously, the built-in heating design reduces the risk of wear and tear on exposed wiring or components, lowering maintenance frequency.

[0049] In some embodiments, the handheld sealing machine 10 further includes a motor 34 connected to the body 5 on the fourth side 54, and the motor 34 drives the universal wheel assembly 2; or the handheld sealing machine 10 further includes a motor 34 connected to the body 5 on the fourth side 54, and the motor 34 drives the upper sealing chain 41 and the lower sealing chain 42. In some embodiments, the motor 34 and the temperature regulating heater 32 are respectively disposed on both sides of the side handle 33. In other embodiments, for embodiments without a motor 34, the handheld sealing machine 10 may also have a reserved position on the body 5 for installing the motor 34, which can be installed and properly connected before use. This structural design and layout allows for several advantages. First, the motor 34 can be paired with two sealing chains as needed, and can also be combined with the universal wheel assembly 2 to flexibly switch between motion drive and sealing power functions. For example, when the motor 34 drives the universal wheel assembly 2, it can automatically assist in moving the equipment, reducing the operator's pushing load, which is especially suitable for long-distance continuous operation. When the motor 34 drives two sealing chains, it can precisely control the chain transmission speed, ensuring that the film delivery and heat-sealing rhythm are matched, improving sealing efficiency and consistency. Second, the motor 34 and the temperature regulating heater 32 are respectively located on both sides of the side handle 33, forming a symmetrical layout. This allows the operator to reach the motor 34 control switch and temperature adjustment button with one hand while holding the handle, realizing integrated operation of holding, moving, and adjusting, reducing the time spent switching actions. Furthermore, the symmetrical layout balances the weight distribution on the fourth side 54 of the machine body, avoiding fatigue or machine tilting caused by excessive weight on one side, and improving operational stability. On the other hand, the addition of motor 34, combined with the chain drive structure, reduces the risk of wear on external transmission components. At the same time, the precise speed adjustment function of motor 34 can adapt to the conveying needs of films of different thicknesses, avoiding film stretching deformation or sealing misalignment caused by unstable speed, thus ensuring the sealing quality.

[0050] In some of these embodiments, such as Figure 3 and Figure 5As shown, the machine body 5 has a heating port 4 on the first side 51, which faces the sealing channel 43 and is used to spray hot air to achieve a heat-melting effect or to abut against the film 1 to achieve a heat-melting effect. This structural design allows for two advantages: First, the heating port 4 can directly spray hot air towards the sealing channel 43 or abut against the film 1, quickly raising the local temperature of the film 1 to a molten state. Combined with the clamping pressure of the upper and lower sealing chains, this ensures a firm seal at the edge of the film 1, reducing problems such as film detachment or air bubbles caused by insufficient heat melting and improving the sealing performance. Second, the two heat-melting methods—hot air spraying or direct abutment—can adapt to different film materials such as heat-sensitive film and ordinary plastic film, as well as sealing requirements of varying thicknesses. For example, the hot air mode is suitable for large-area uniform heating, avoiding burns to the film material caused by high-temperature contact; the abutment mode can achieve precise local heat melting, suitable for thick films or scenarios requiring rapid sealing, improving the equipment's process compatibility. On the other hand, the heating port 4 corresponds to the sealing channel 43, so there is no need to adjust the heating position. When the operator pushes the handheld sealing machine 10 to move, the film 1 can be transported, heated and sealed simultaneously, reducing the process connection time and improving work efficiency. At the same time, the integrated design reduces the dependence on external heating equipment and simplifies the equipment configuration and operation complexity.

[0051] The following will continue to combine Figures 1 to 5 The handheld sealing machine 10 is illustrated in some embodiments. In some of these embodiments, the handheld sealing machine 10 is designed for easy sealing, making it better suited for sealing tobacco stack films 1 in controlled atmosphere storage conditions. As an example, the handheld sealing machine 10 is specifically designed for the sealing process in controlled atmosphere storage of tobacco leaves, ensuring the airtightness of the controlled atmosphere tobacco stacks, and is convenient, stable, and labor-saving. The handheld sealing machine 10 features an adjusted equipment structure and optimized operating performance, making it suitable for controlled atmosphere storage environments. It has a simple structure, low cost, and is easy to maintain.

[0052] The handheld sealing machine 10 has an upper handle 31 on one side and a side handle 33 on the other, with a set of casters 2 mounted on the other side. In contrast, the handheld parts of traditional equipment are not suitable for current work scenarios. Operators need to lift and rotate the machine 90 degrees to hold it, which can easily lead to hand fatigue over time and makes it difficult to maintain stable operation in complex work environments. Therefore, the handheld sealing machine 10 in this embodiment has handles on both sides, allowing operators to choose either handle to lift it, effectively reducing fatigue caused by prolonged operation and ensuring the stability of the operator's grip. This effectively increases the balance and operational accuracy of the equipment. Combined with the design of the casters 2, it eliminates the need for frequent bending or dragging of the equipment during movement, avoiding inconvenience and inefficiency, especially in work scenarios where frequent position adjustments are required for traditional equipment, making mobile movement a major challenge. Therefore, a set of casters 2 is installed on the other side of the handheld part of the handheld sealing machine 10. The addition of each caster allows the handheld sealing machine 10 to move flexibly and easily on a flat surface. The operator only needs to push it lightly to adjust its position, without having to bend over or drag it, effectively increasing the stability of the sealing and avoiding uneven sealing or operational errors caused by equipment slippage. Combined with the different structural designs on the four sides, the overall center of gravity of the equipment is cleverly arranged, making operation more stable and avoiding uneven sealing or damage to the film 1 caused by equipment shaking. In this way, through the triple optimization of the caster set 2, the upper handheld handle 31, the side handheld handle 33, and the equipment's center of gravity structure, the handheld sealing machine 10 not only improves efficiency and yield, ensuring the sealing effect of the film 1 of the tobacco stack, but also significantly reduces labor intensity, making it particularly suitable for scenarios requiring frequent movement and continuous operation.

[0053] As an example, the handheld sealing machine 10 is provided with two hand handles, including an upper hand handle 31 and a side hand handle 33. The upper hand handle 31 is located on the second side 52 of the machine body 5, and the side hand handle 33 is located on the fourth side 54 of the machine body 5. Figure 1 The upper hand handle 31 is located at the top of the body 5. Figure 3 As shown, the side hand handle 33 is located on the top of the body 5 and is positioned opposite to the heating port 4. The design of the two hand handles allows the operator to flexibly choose the grip direction, providing a stable operating experience and reducing hand fatigue caused by long-term operation.

[0054] The caster wheel, such as Figure 1 and Figure 5As shown, the device includes a first caster wheel 21, a second caster wheel 22, a third caster wheel 23, and a fourth caster wheel 24. These casters are located around the bottom of the device, ensuring that the handheld sealing machine 10 can move flexibly and easily on a flat surface. Operators can easily adjust the position of the handheld sealing machine 10 by simply pushing it, without bending over or dragging it, thus improving movement efficiency. By strategically positioning the second caster wheel 22 and the third caster wheel 23 close to the upper edge of the handheld sealing machine 10, i.e., the second side 56, the device's center of gravity is ensured to be stable, preventing tilting towards the temperature regulating heater 32, the side handle 33, and the motor 34, thereby guaranteeing the stability of the handheld sealing machine 10 during operation.

[0055] The following example illustrates the specific operation of the handheld sealing machine 10. The operator first starts the handheld sealing machine 10, which then heats up and enters its working state. The operator holds the upper handle 31 and applies force to the handheld sealing machine 10 from a suitable position, using the casters 2 to flexibly adjust the position of the handheld sealing machine 10, aligning the upper sealing chain 41 and lower sealing chain 42 of the handheld sealing machine 10 with the edge of the film 1 to be sealed; alternatively, the operator can hold the side handle 33 and apply force to the handheld sealing machine 10. Then, align the two sides of the film 1, ensuring that the film 1 is flat and wrinkle-free. Next, push the handheld sealing machine 10 so that the upper sealing chain 41 and lower sealing chain 42 heat-seal the film 1. During the sealing process, the operator must maintain a uniform speed to ensure even and secure sealing. Furthermore, depending on the area to be sealed, the position of the equipment can be flexibly adjusted using the casters 2, and the above steps can be repeated to complete the entire sealing operation.

[0056] With this design, the handheld sealing machine 10 has the following advantages.

[0057] 1. Improved ease of operation: By optimizing the equipment structure, the cumbersome operation of traditional handheld sealing machines 10, which required carrying the equipment and rotating it 90 degrees, has been eliminated, simplifying the sealing process and reducing the difficulty of operation.

[0058] 2. Enhanced stability: The design of two hand handles in different positions ensures the stability of the operator during long-term use, reduces operational errors caused by hand fatigue, improves the sealing quality, and avoids uneven sealing or operational errors caused by equipment slippage.

[0059] 3. High-efficiency operation: The optimized handheld sealing machine 10 can significantly improve sealing efficiency, and is especially suitable for scenarios that require frequent movement and continuous operation, effectively shortening the sealing operation time.

[0060] 4. Reduced labor intensity: By reducing the operation of hand-held and rotating equipment, the physical burden on operators is reduced, making it particularly suitable for maintaining high efficiency and stability during long-term operations.

[0061] 5. Enhanced Safety: By optimizing operating procedures and equipment design, safety hazards caused by improper equipment operation are reduced. Operators no longer need to perform complex lifting and rotating actions, reducing the probability of accidents such as burns and film jamming, thus improving operational safety.

[0062] It should be noted that other embodiments of this application also include a handheld sealing machine formed by combining the technical features of the above embodiments.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A handheld sealing machine (10), characterized in that, Includes a set of casters (2), an upper hand handle (31), a side hand handle (33), an upper sealing chain (41), a lower sealing chain (42), and a body (5); The fuselage (5) has a first side (51), a second side (52), a third side (53) and a fourth side (54) connected in sequence, and the first side (51) is connected to the fourth side (54), the first side (51) is opposite to the third side (53), and the second side (52) is opposite to the fourth side (54); The upper sealing chain (41) and the lower sealing chain (42) are respectively disposed on the machine body (5), and a sealing channel (43) is formed between the upper sealing chain (41) and the lower sealing chain (42). The upper hand handle (31) is connected to the body (5) on the second side (52); The omnidirectional wheel assembly (2) is connected to the fuselage (5) on the third side (53); The side hand handle (33) is connected to the body (5) on the fourth side (54).

2. The handheld sealing machine (10) according to claim 1, characterized in that, The handheld sealing machine (10) further includes a temperature regulating heater (32) connected to the body (5) on the fourth side (54), and the temperature regulating heater (32) is configured to heat the sealing channel (43) between the upper sealing chain (41) and the lower sealing chain (42).

3. The handheld sealing machine (10) according to claim 2, characterized in that, The handheld sealing machine (10) also includes a motor (34) connected to the body (5) on the fourth side (54), and the motor (34) drives the upper sealing chain (41) and the lower sealing chain (42).

4. The handheld sealing machine (10) according to claim 3, characterized in that, The motor (34) and the temperature regulating heater (32) are respectively located on both sides of the side hand handle (33).

5. The handheld sealing machine (10) according to claim 1, characterized in that, The first side (51) is parallel to the third side (53), the second side (52) is parallel to the fourth side (54), and the first side (51) is perpendicular to the second side (52).

6. The handheld sealing machine (10) according to claim 1, characterized in that, The first length direction (35) of the upper hand handle (31) is parallel to the second length direction (36) of the side hand handle (33); or, The body (5) has a heating port (4) on the first side (51), and the heating port (4) faces the sealing groove (43).

7. The handheld sealing machine (10) according to claim 1, characterized in that, The upper sealing chain (41) and the lower sealing chain (42) are respectively connected to the body (5) on the first side (51); or, The upper sealing chain (41) and the lower sealing chain (42) are located inside the body (5).

8. The handheld sealing machine (10) according to any one of claims 1 to 7, characterized in that, The caster assembly (2) includes at least three casters.

9. The handheld sealing machine (10) according to claim 8, characterized in that, The caster assembly (2) includes four casters, namely the first caster (21), the second caster (22), the third caster (23) and the fourth caster (24), and the four casters are located on at least two straight lines.

10. The handheld sealing machine (10) according to claim 9, characterized in that, The first omnidirectional wheel (21) and the fourth omnidirectional wheel (24) are located between the second omnidirectional wheel (22) and the first side (55) of the third side (53); The second omnidirectional wheel (22) and the third omnidirectional wheel (23) are located between the first omnidirectional wheel (21) and the second side (56) of the third side surface (53); The distance between the first omnidirectional wheel (21) and the fourth omnidirectional wheel (24) is greater than the distance between the second omnidirectional wheel (22) and the third omnidirectional wheel (23).

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