Tension structure for inflatable cushion material conveying and air cushion machine

Abstract

The present invention discloses a tensioning structure for conveying an inflatable cushion material and an air cushion machine. The tensioning structure includes a roller, a shaft member, a pressure roller, and a damping member. The roller is sleeved on the shaft member, the pressure roller is located above the roller, the damping member is sleeved on the rotating shaft of the shaft member or the pressure roller, and the end face of the damping member presses against the end of the roller or the pressure roller. The tensioning structure is installed on the air cushion machine. When the damping member is sleeved on the shaft member, the end of the roller is in tight contact with the damping member to achieve the purpose of reducing the rotation speed of the roller. When the damping member is sleeved on the rotating shaft of the pressure roller, the end of the pressure roller is in tight contact with the damping member to achieve the purpose of reducing the rotation speed of the pressure roller. When the inflating structure of the air cushion machine pulls the air cushion film, the air cushion film can be tensioned, the tension of the air cushion film is increased, the air cushion film is not easily floated during the conveying process, and the situation that part of the air cushion film leaks air or even breaks due to the up and down floating of the air cushion film is prevented, thereby ensuring the inflation stability and the quality of the air cushion film product.

Description

Technical Field

[0001] The present invention relates to a tensioning structure for conveying an inflatable cushion material and an air cushion machine. Background Art

[0002] In many fields such as logistics, online shopping, medicine, chemical industry, scientific research, and electronics, the problems of product packaging and buffer protection are often involved. Currently, air cushion films have been widely used at home and abroad to fill the packaging. Such air cushion films can be produced on-site according to needs, with low material transportation costs, small floor space, and environmental protection. They are time-saving and labor-saving to fill, and at the same time, the protection effect on products is the best, so they have been widely used.

[0003] Currently, in the air cushion film manufacturing industry, the inflatable cushion material is conveyed and guided through the guide rod of the buffer air cushion machine. During the conveying process of the inflatable cushion material, through the air supply of the air supply pipe, the inflatable cushion material is filled and expanded. After passing through the heat sealing structure, an air cushion film product is formed. During the process of the air supply pipe inflating the inflatable cushion material, high-pressure gas will be filled into the inflatable cushion material, and at the same time, it will also flow along the air channels on the inflatable cushion material to the inflatable cushion material being transported to the air supply pipe, and even to the inflatable cushion material film roll. The air pressure for guiding the paper to inflate drops, and the formed air cushion film is not fully filled and expanded, affecting the quality of the air cushion film.

[0004] In the invention patent with the publication number CN105465599B and the name "A novel inflating structure for a buffer air bag inflator", by setting a pressure wheel that can swing and rotate on the buffer air bag inflator, the pressure wheel presses on the air supply channel of the air cushion film to disconnect the air flow channel, so that the gas and air pressure output from the air supply pipe in the air channel of the air cushion film are relatively stable. However, when the air supply pipe inflates the air cushion film, due to the obstruction of the air flow in the air channel, the gas will flow chaotically in the air channel of the air cushion film between the air supply pipe and the pressure wheel, causing the air cushion film in this part to float up and down, and it is easy to have the situation of air leakage or even breakage of some air cushion films, thus affecting the inflation stability and the quality of the air cushion film product.

[0005] Therefore, how to overcome the above technical defects is a technical problem that those skilled in the art need to solve urgently. Summary of the Invention

[0006] The purpose of the present invention is to provide a tensioning structure for conveying an inflatable cushion material and an air cushion machine.

[0007] According to one aspect of the present invention, a tensioning structure for conveying an inflatable cushion material is provided, including: a roller;

[0008] a shaft member, the roller is sleeved on the shaft member;

[0009] A rotatable pressure roller is located above the drum. A channel for conveying the inflated cushion material is formed between the pressure roller and the drum. When the inflated cushion material is accommodated between the pressure roller and the drum, the pressure roller presses on the inflation channel of the inflated cushion material; and

[0010] A damping member is sleeved on the shaft member and can slide along the shaft member. The end face of the damping member presses against the end of the drum. The drum is rotatably connected to the shaft member,

[0011] Alternatively, the damping member is sleeved on the rotating shaft of the pressure roller and can slide along the rotating shaft of the pressure roller. The end face of the damping member presses against the end of the pressure roller.

[0012] In the technical solution of the present invention, the tensioning structure is installed on the air cushion machine. The consumable material of the air cushion film, that is, the inflated cushion material, is sleeved on the unwinding reel of the air cushion machine in the form of a roll. After the inflated cushion material passes through the channel between the pressure roller and the drum, the inflation pipe of the air cushion machine is inserted into the inflation channel on the inflated cushion material for inflation operation. At the same time, the pressure roller presses on the inflation channel of the inflated cushion material. When the damping member is sleeved on the shaft member, since the end face of the damping member presses against the end of the drum, the end of the drum is in tight contact with the damping member to achieve the purpose of reducing the rotation speed of the drum. When the inflation structure of the air cushion machine pulls the inflated air cushion film, the air cushion film can be tensioned, playing a role in tensioning the air cushion film, improving the tension of the air cushion film, making the air cushion film not easy to float during the conveying process, and ensuring stable conveying. It prevents the situation that part of the air cushion film leaks air or even breaks due to the up and down floating of the air cushion film, thereby ensuring the stability of inflation and the quality of the air cushion film product. When the damping member is sleeved on the rotating shaft of the pressure roller, since the end face of the damping member presses against the end of the pressure roller, the end of the pressure roller is in tight contact with the damping member to achieve the purpose of reducing the rotation speed of the pressure roller. When the inflation structure of the air cushion machine pulls the inflated air cushion film, the air cushion film can be tensioned, playing a role in tensioning the air cushion film, improving the tension of the air cushion film, making the air cushion film not easy to float during the conveying process, and ensuring stable conveying. It prevents the situation that part of the air cushion film leaks air or even breaks due to the up and down floating of the air cushion film, thereby ensuring the stability of inflation and the quality of the air cushion film product.

[0013] In some embodiments, an elastic member may further be included. One end of the elastic member is fixed, and the other end presses against the damping member so that the end face of the damping member presses against the end of the drum or the pressure roller. Thus, the elastic member can adjust the pressing force between the damping member and the drum or the pressure roller to adjust the tension of the air cushion film. And if the damping member wears, through the pressing action of the elastic member, the damping member can maintain the purpose of pressing tightly against the end of the drum or the end of the pressure roller, ensuring that the damping member always has a certain pressing force on the end of the drum or the end of the pressure roller.

[0014] In some embodiments, the elastic component may be a spring, which is sleeved on the shaft component or the rotating shaft of the pressure roller. Thus, the restoring force of the spring can adjust the abutting pressure between the damping component and the roller or the pressure roller to adjust the tension of the air cushion film, and if the damping component is worn, the abutting effect of the spring can enable the damping component to maintain abutment against the end of the roller or the pressure roller, ensuring that the damping component always has a certain abutment force against the end of the roller or the pressure roller.

[0015] In some embodiments, a sleeve may be further included, the sleeve being sleeved on the roller, and a channel for conveying the air cushion film is formed between the pressure roller and the sleeve. Therefore, because the heights of the inflation channel and the airbag part of the inflated air cushion film are different, the movement path of the air cushion film during conveyance will be affected. Since the sleeve is sleeved on the roller, the outer circumference of the sleeve is higher than the outer circumference of the roller, and the inflation channel of the air cushion film is located between the pressure roller and the sleeve. In this way, the sleeve can balance the heights of the inflation channel and the airbag part of the air cushion film, and can further ensure the sealing effect of the pressure roller and the sleeve on the inflation channel of the air cushion film, so that a closed high-pressure area is formed in the inflation channel of the air cushion film, the pressure of the inflation area is ensured, and the gas in the inflation channel is prevented from running forward. In addition, after the sleeve balances the height of the inflation channel and the airbag part of the air cushion film, the air cushion film can be kept straight and clamped without tilting during transportation (if there is no sleeve, the air cushion film will float during transportation due to the different heights of the inflation part and the airbag part of the air cushion film), further reducing the degree of up and down floating of the air cushion film during transportation, and improving the inflation stability of the air cushion film product. At the same time, sleeves of corresponding thickness sizes can be replaced according to different air cushion film products to meet the thickness of air cushion film products of different thicknesses after inflation, ensuring that the air cushion film is transported in a straight line.

[0016] In some embodiments, a first elastic layer may be provided on the outer circumference of the pressure roller, and a second elastic layer may be provided on the outer circumference of the sleeve. Thus, the first elastic layer on the pressure roller can ensure that the inflatable channel of the inflatable cushion material is effectively compressed without damaging the inflatable cushion material, and the second elastic layer on the sleeve can ensure that the inflatable channel of the inflatable cushion material is effectively compressed without damaging the air cushion film.

[0017] In some embodiments, when the damping member is sleeved on the shaft component, a limiting plane may be provided on the shaft component, the damping member is in a ring shape, and a limiting portion adapted to the limiting plane is provided on the inner ring of the damping member. Thus, the damping member cooperates with the shaft component through the limiting portion and the limiting plane, which can ensure that the damping member does not rotate idly on the shaft component, and does not affect the damping member sliding along the shaft component to dynamically press against the end of the roller.

[0018] In some embodiments, when the damping member is sleeved on the shaft member, a first bearing and a second bearing may further be included. The inner rings of the first bearing and the second bearing are both sleeved on the shaft member, and the outer rings of the first bearing and the second bearing both abut against the inner wall of the drum. The first bearing is located between the damping member and the second bearing. Thus, the drum can achieve relative rotation with the shaft member through the first bearing and the second bearing, and it can be ensured that the drum rotates smoothly on the shaft member.

[0019] In some embodiments, a retaining ring may further be included. The retaining ring is sleeved and fixed on the shaft member and is located between the damping member and the first bearing. The outer diameter of the retaining ring is smaller than the inner diameter of the drum. Thus, the retaining ring can prevent the damping member from contacting the first bearing and affecting the decelerating effect of the damping member on the rotation of the drum.

[0020] In some embodiments, a limiting channel may further be included. The limiting channel is provided on the side of the drum. The height of the entrance of the limiting channel is equivalent to the height of the channel for conveying the inflatable cushion material between the pressure roller and the drum. Thus, the limiting channel can further prevent the air cushion film from floating up and down due to air pressure during inflation, which affects subsequent formal inflation and heat sealing. If the inflatable cushion material floats up and down during inflation and heat sealing, the heat-sealing line will be bent, which will greatly reduce the quality of the air cushion film product, easily cause air leakage and even damage the air cushion film. Moreover, the height of the entrance of the limiting channel is equivalent to the height of the channel for conveying the inflatable cushion material between the pressure roller and the drum, so as to achieve cooperation, enabling the pre-inflated inflatable cushion material to be smoothly conveyed from the clamping position between the pressure roller and the drum to the limiting channel. Especially, the existence of the tension of the air cushion film can ensure that the pre-inflated inflatable cushion material fits the limiting channel for conveying, further reducing the floating of the air cushion film. In addition, the limiting channel can provide a horizontal path for the conveying of the inflatable cushion material. After passing through the limiting channel, the inflatable cushion material will move obliquely downward towards the inflating part of the air cushion machine. The inflatable cushion material will have a path change at the exit position of the limiting channel, generating a fold angle, thereby further tensioning the inflatable cushion material. The limiting channel can increase a certain tensioning effect on the inflatable cushion material and, to a certain extent, squeeze and compress the inflating channels on the inflatable cushion material, reducing the amount of air flow back in the inflating channels and improving the saturation of inflation.

[0021] In some embodiments, an upper limiting plate and a lower limiting plate distributed up and down may further be included. A limiting channel is formed between the upper limiting plate and the lower limiting plate. Thus, a limiting channel for conveying the inflatable cushion material can be formed between the upper limiting plate and the lower limiting plate.

[0022] According to another aspect of the present invention, an air cushion machine is further provided, which includes a machine body and the aforementioned tensioning structure. The end of the shaft member is provided on the panel of the machine body, and the pressure roller is provided on the panel of the machine body.

[0023] The air cushion machine of the present invention has an air cushion film consumable, i.e., an inflatable cushion material, which is rolled onto an unwinding drum of the air cushion machine. After the inflatable cushion material passes through the channel between the pressure roller and the drum, the inflation tube of the air cushion machine is inserted into the inflation channel on the inflatable cushion material for inflation. At the same time, the pressure roller presses on the inflation channel of the inflatable cushion material. Since the end face of the damping member presses against the end of the drum or the end of the pressure roller, when the inflatable cushion material is unrolled, the end of the drum or the end of the pressure roller presses against the damping member to achieve the purpose of slowing down the rotation of the drum or the pressure roller. The inflation structure of the air cushion machine can tension the air cushion film when pulling the inflated air cushion film, thereby tensioning the air cushion film and increasing the tension of the air cushion film, so that the air cushion film is not easy to float during transportation, and the transportation is stable, which prevents partial leakage or even damage of the air cushion film due to the up and down floating of the air cushion film, thereby ensuring the stability of inflation and the quality of the air cushion film product.

[0024] In some embodiments, the end of the shaft component can be threadedly connected to the panel of the machine body. Thus, the shaft component is very convenient for installation and removal of the shaft component by threading the panel of the machine body.

[0025] In some embodiments, the angle between the roller and the vertical line of the panel of the machine body can be 1 to 15 degrees. Therefore, because the thickness of the airbag part of the panel away from the machine body after inflation is greater than the inflation channel part, it is found through a large number of experiments that during the transportation process, the air cushion film will move closer to the panel of the machine body, affecting the transportation path. In order to stabilize the transportation path of the air cushion film, the angle between the roller and the vertical line of the panel of the machine body is set to 1 to 15 degrees, that is, the roller is tilted, so that the air cushion film moves in the direction of the panel away from the machine body, and does not let the air cushion film move towards the panel of the machine body, thereby balancing the deviation of the transportation path caused by the unevenness of the air cushion film. At the same time, the tensioning effect of the damping member will also weaken the thickness increase of the air cushion film after inflation, further improving the stability of the air cushion film transportation path, and ensuring the stability of continuous production of the air cushion film. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a tensioning structure for conveying an inflatable cushion material according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A side view of the tensioning structure shown;

[0028] Figure 3 for Figure 1 A schematic diagram of the split structure of the tensioning structure shown;

[0029] Figure 4 for Figure 2 A cross-sectional view of the tensioning structure for conveying an inflatable cushion material along the AA direction shown;

[0030] Figure 5 for Figure 3Schematic diagram of the shaft component of the tensioning structure shown

[0031] Figure 6 Schematic diagram of the air cushion machine according to an embodiment of the present invention

[0032] Figure 7 is Figure 6 Side view of the air cushion machine shown Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0035] Figures 1 to 5 Schematically shows the structure of the tensioning structure for conveying the inflatable cushion material according to an embodiment of the present invention

[0036] Refer to Figures 1 to 5 , a tensioning structure for conveying an inflatable cushion material, including a roller 1, a shaft component 2, a pressure roller 3 and a damping member 4. In addition, the tensioning structure for conveying the inflatable cushion material may further include an elastic member, a sleeve 6, a first bearing 7, a second bearing 8, a retaining ring 9 and a limiting channel 10.

[0037] Refer to Figure 3 and Figure 4 , the roller 1 is sleeved on the shaft component 2, and the roller 1 can rotate on the shaft component 2. Refer to Figure 4 and Figure 5 , a first annular step surface 11 is formed on the inner wall of the roller 1. Refer to Figure 5 , a second annular step surface 22 is formed on the shaft component 2, and a limiting plane 21 is formed on the outer periphery of the shaft component 2. Refer to Figure 3, in this embodiment, the damping member 4 is sleeved on the shaft member 2. The damping member 4 is annular. A limiting portion 41 adapted to the limiting plane 21 on the shaft member 2 is formed on the inner ring of the damping member 4. In this embodiment, the elastic member is a spring 5. The method of installing the roller 1 on the shaft member 2 is as follows: First, install the second bearing 8 into the roller 1 and it is stuck on the first annular step surface 11 inside the roller 1. The outer ring of the second bearing 8 abuts against the inner wall of the roller 1. The second bearing 8 can be a deep groove ball bearing. Then, insert and install the shaft member 2 into the roller 1 and one end of the shaft member 2 passes through the second bearing 8. The inner ring of the second bearing 8 is clamped on the shaft member 2. Then, sequentially sleeve and install the first bearing 7, the retaining ring 9, the damping member 4, and the spring 5 on the other end of the shaft member 2. The inner ring of the first bearing 7 is clamped on the shaft member 2 and the first bearing 7 is stuck on the second annular step surface 22 on the shaft member 2. The outer ring of the first bearing 7 abuts against the inner wall of the roller 1. The first bearing 7 can be a hybrid bearing. The retaining ring 9 is sleeved on the shaft member 2 and fixedly connected to the shaft member 2. The damping member 4 and the shaft member 2 are matched through the limiting portion 41 and the limiting plane 21. The damping member 4 can slide along the shaft member 2, and the sliding range is the length range of the limiting plane 21 along the length direction of the shaft member 2. The cooperation between the damping member 4 and the shaft member 2 through the limiting portion 41 and the limiting plane 21 can ensure that the damping member 4 does not rotate idly on the shaft member 2 and does not affect the sliding of the damping member 4 along the shaft member 2. After the spring 5 is sleeved on the shaft member 2, one end of the spring 5 is fixed on the panel of the air cushion machine body, and the other end of the spring 5 presses against the damping member 4 so that the end face of the damping member 4 presses against the end of the roller 1. The spring 5 is in a compressed state. The restoring force of the spring 5 can adjust the pressing force between the damping member 4 and the roller 1 to adjust the tension of the air cushion film. And if the damping member 4 is worn, through the pressing action of the spring 5, the damping member 4 can maintain the purpose of pressing against the end of the roller 1, ensuring that the damping member 4 always has a certain pressing force on the end of the roller 1, so that the damping member 4 can dynamically press against the end of the roller 1. The roller 1 can achieve relative rotation with the shaft member 2 through the first bearing 7 and the second bearing 8, and can ensure that the roller 1 rotates smoothly on the shaft member 2.

[0038] Reference Figure 3, the left end of the shaft member 2 is fixedly installed on the panel 101 of the air cushion machine body. Specifically, it can be: there are threaded holes 1011 formed on the panel 101 of the air cushion machine body, and the left end of the shaft member 2 is formed with external threads adapted to the threaded holes 1011. The end of the shaft member 2 is threadedly connected to the panel 101 of the machine body. The threaded connection between the shaft member 2 and the panel 101 of the machine body is very convenient for the installation and disassembly of the shaft member 2. When the second bearing 8, the first bearing 7, the retaining ring 9, the damping member 4, and the spring 5 are all installed on the shaft member 2, the shaft member 2 is screwed into the threaded hole 1011 on the panel 101 of the machine body. One end of the spring 5 abuts against the panel 101 of the machine body. Or, there can be a step formed in the threaded hole 1011, and one end of the spring 5 abuts against the step in the threaded hole 1011. At this time, under the action of the elastic force of the spring 5, the end face of the damping member 4 presses against the end of the roller 1.

[0039] Reference Figures 1 to 3 , the pressure roller 3 is installed on the panel 101 of the machine body. The pressure roller 3 is located above the roller 1. The structure of the pressure roller 3 can refer to the air pressure resistance roller module in the invention patent with the publication number CN105465599B and the name "A New Inflation Structure for a Buffer Air Bag Inflator", which will not be elaborated here. The pressure roller 3 can rotate around the rotating shaft 31, and the pressure roller 3 can swing on the panel 101 of the machine body along with the swing rod 32. Under the pulling force of the tension spring 33, the pressure roller 3 can maintain a tendency to always move towards the roller 1. A channel for conveying the inflated cushion material is formed between the pressure roller 3 and the roller 1. When the inflated cushion material is accommodated between the pressure roller 3 and the roller 1, the pressure roller 3 presses on the inflation channel of the inflated cushion material.

[0040] Reference Figures 1 to 4, in this embodiment, a sleeve 6 is installed on the drum 1. The sleeve 6 is sleeved on the drum 1 and is located below the pressure roller 3. A channel for conveying the inflated cushion material is formed between the pressure roller 3 and the sleeve 6. The end face of the damping member 4 can simultaneously press against the end of the drum 1 and the end face of the sleeve 6. A screw hole can be formed on the wall of the sleeve 6. After the sleeve 6 is sleeved on the drum 1, a screw is screwed into the screw hole, and the end of the screw presses against the outer wall of the drum 1. Tightening the screw can fix the sleeve 6 on the drum 1. To prevent the nut of the screw from damaging the inflated cushion material, the nut of the screw for fixing the sleeve 6 is sunk into the outer periphery of the sleeve 6 after being tightened; because the height of the inflation channel and the airbag part of the inflated air cushion film is different, it will affect the movement path of the air cushion film during conveying. Since the sleeve 6 is sleeved on the drum 1 and the outer periphery of the sleeve 6 is higher than the outer periphery of the drum 1, and the inflation channel of the air cushion film is located between the pressure roller 3 and the sleeve 6. In this way, the sleeve 6 can not only balance the height of the inflation channel and the airbag part of the air cushion film, but also further ensure the sealing effect of the pressure roller 3 and the sleeve 6 on the inflation channel of the air cushion film, so as to form a closed high-pressure area in the inflation channel of the air cushion film, ensure the pressure of the inflation area, and prevent the gas in the inflation channel from running forward. In addition, after the sleeve 6 balances the height of the inflation channel and the airbag part of the air cushion film, the air cushion film can be kept straight and clamped without tilting during conveying (if there is no sleeve 6, due to the different heights of the inflated part and the airbag part of the air cushion film, the air cushion film will float during conveying), further reducing the degree of up and down floating of the air cushion film during conveying, improving the inflation stability of the air cushion film product, and at the same time, the corresponding thickness-sized sleeve 6 can be replaced according to different air cushion film products to meet the thickness after inflation of different thickness air cushion film products and ensure the straight conveying of the air cushion film.

[0041] In this embodiment, a first elastic layer is wrapped on the outer periphery of the pressure roller 3, and a second elastic layer is also wrapped on the outer periphery of the sleeve 6. The first elastic layer on the pressure roller 3 can not only ensure effective pressing of the inflation channel of the inflated cushion material, but also will not cause damage to the inflated cushion material. The second elastic layer on the sleeve 6 can not only ensure effective pressing of the inflation channel of the inflated cushion material, but also will not cause damage to the air cushion film.

[0042] In addition, after the retaining ring 9 is installed on the shaft member 2, the retaining ring 9 is located between the damping member 4 and the first bearing 7. The outer diameter of the retaining ring 9 is smaller than the inner diameter of the drum 1. In this way, the retaining ring 9 can prevent the damping member 4 from contacting the first bearing 7 and affecting the deceleration effect of the damping member 4 on the rotation of the drum 1.

[0043] Reference Figures 1 to 3 , a limiting channel 10 is installed on the side of the drum 1. An upper limiting plate 1001 and a lower limiting plate 1002 are installed on the panel 101 of the machine body. The upper limiting plate 1001 and the lower limiting plate 1002 are distributed up and down. The space between the upper limiting plate 1001 and the lower limiting plate 1002 forms the limiting channel 10. Reference Figure 1, the height of the entrance of the limiting channel 10, i.e., the left port of the limiting channel 10, is equivalent to the height of the channel for conveying the inflated cushion material between the pressing roller 3 and the sleeve 6. Specifically, the height of the lower limiting plate 1002 can be kept basically flush with the top of the sleeve 6. In addition, the two ends of the upper limiting plate 1001 and the lower limiting plate 1002 can be formed with inclined guiding surfaces, so that the inflated cushion material can be smoothly conveyed, preventing the corners at both ends of the upper limiting plate 1001 and the lower limiting plate 1002 from damaging the inflated cushion material; after passing through the channel between the pressing roller 3 and the sleeve 6, the inflated cushion material enters the limiting channel 10. The limiting channel 10 can further prevent the air cushion film from floating up and down due to air pressure during inflation, affecting subsequent formal inflation and heat sealing. If the inflated cushion material floats up and down during inflation and heat sealing, it will cause the heat sealing line to bend, which will greatly reduce the quality of the air cushion film finished product, easily lead to air leakage and even cause the air cushion film to be damaged. Moreover, the height of the entrance of the limiting channel 10 is equivalent to the height of the channel for conveying the inflated cushion material between the pressing roller 3 and the sleeve 6 to achieve cooperation, so that the pre-inflated inflated cushion material is smoothly conveyed from the clamping position between the pressing roller 3 and the sleeve 6 to the limiting channel 10. Under the action of the damping member 4, the air cushion film is kept taut, and the existence of the tension force of the air cushion film can ensure that the pre-inflated inflated cushion material fits the limiting channel 10 for conveying, further reducing the floating of the air cushion film; in addition, referring to Figure 1 , when the tensioning structure is installed on the air cushion machine, the height of the exit of the limiting channel 10, i.e., the right port of the limiting channel 10, should be higher than the inflation part of the air cushion machine. Specifically, the height of the lower limiting plate 1002 should be higher than the inflation pipe of the air cushion machine. In this way, the limiting channel 10 can not only provide a horizontal path for the conveyance of the inflated cushion material, but also the inflated cushion material will move obliquely downward to the inflation part of the air cushion machine after passing through the limiting channel 10. The inflated cushion material will have a path change and generate a fold angle at the exit position of the limiting channel 10, thereby further tensioning the inflated cushion material. The limiting channel 10 can increase a certain tensioning effect on the inflated cushion material and, to a certain extent, squeeze and narrow the inflation channels on the inflated cushion material, reducing the amount of air flow back in the inflation channels and improving the inflation saturation.

[0044] The tensioning structure of the present invention is installed on the air cushion machine. The consumable material of the air cushion film, that is, the inflatable cushion material, is rolled onto the unwinding drum of the air cushion machine. After the inflatable cushion material passes through the channel between the pressure roller 3 and the sleeve 6 and the limit channel 10 in turn, the inflation tube of the air cushion machine is inserted into the inflation channel on the inflatable cushion material for inflation. At the same time, the pressure roller 3 is pressed on the inflation channel of the inflatable cushion material. Since the end surface of the damping member 4 is pressed against the end of the roller 1, the end of the roller 1 is pressed against the damping member 4 to achieve the deceleration of the rotation of the roller 1. The purpose of the invention is that the inflation structure of the air cushion machine can tension the air cushion film when pulling the inflated air cushion film, thereby playing the role of tensioning the air cushion film and increasing the tension of the air cushion film, so that the air cushion film is not easy to float during the transportation process, the transportation is stable, and the situation that part of the air cushion film leaks or even breaks due to the up and down floating of the air cushion film is prevented, thereby ensuring the stability of inflation and the quality of the air cushion film product. At the same time, the spring 5 can adjust the pressing pressure between the damping member 4 and the roller 1 to adjust the tension of the air cushion film, and if the damping member 4 is When the damping element 4 is worn, the spring 5 can press against the end of the roller 1 to ensure that the damping element 4 always has a certain pressing force on the end of the roller 1. The existence of the sleeve 6 can further ensure the sealing effect of the pressure roller 3 and the sleeve 6 on the inflation channel of the air cushion film, so that a closed high-pressure area is formed in the inflation channel of the air cushion film, the pressure in the inflation area is ensured, and the gas in the inflation channel is prevented from running forward. Moreover, the sleeve 6 can balance the height of the inflation channel and the airbag part of the air cushion film, so that the air cushion film does not tilt during the transportation process and remains straight, further reducing the degree of up and down floating of the air cushion film during the transportation process, and improving the inflation stability of the air cushion film product. At the same time, the sleeve 6 of corresponding thickness size can be replaced according to different air cushion film products to meet the thickness of air cushion film products of different thicknesses after inflation, and ensure that the transportation of the air cushion film is in a straight line. In addition, the limiting channel 10 can further prevent the air cushion film from floating up and down due to air pressure during inflation, affecting the subsequent formal inflation and heat sealing.

[0045] In other embodiments, the damping member 4 can also be sleeved on the rotating shaft 31 of the pressure roller 3. In this scenario, the drum 1 can rotate on the shaft member 2 or can be set not to rotate. The connection structure principle of the spring 5, the damping member 4, and the rotating shaft 31 of the pressure roller 3 is the same as that of the connection structure of the spring 5, the damping member 4, and the shaft member 2 in this embodiment, and will not be elaborated here. The damping member 4 is sleeved on the rotating shaft 31 of the pressure roller 3 and can slide along the rotating shaft 31 of the pressure roller 3. Under the elastic force of the spring 5, the end face of the damping member 4 presses against the end of the pressure roller 3. The damping member 4 is located between the panel 101 of the machine body and the end of the pressure roller 3, and the spring 5 is located between the panel 101 of the machine body and the damping member 4. Since the end face of the damping member 4 presses against the end of the pressure roller 3, the end of the pressure roller 3 is in tight contact with the damping member 4 to achieve the purpose of reducing the rotation speed of the drum 1. When the inflation structure of the air cushion machine pulls the inflated air cushion film, the air cushion film can be tensioned, which plays a role in tensioning the air cushion film, improves the tension of the air cushion film, makes the air cushion film not easy to float during the conveying process, ensures stable conveying, and prevents the situation of partial air leakage or even damage of the air cushion film due to the up and down floating of the air cushion film. Thus, the stability of inflation and the quality of the air cushion film product are ensured. At the same time, the spring 5 can adjust the pressing force between the damping member 4 and the pressure roller 3 to adjust the tension of the air cushion film. And if the damping member 4 is worn, due to the pressing action of the spring 5, the damping member 4 can maintain the purpose of pressing tightly against the end of the pressure roller 3, ensuring that the damping member 4 always has a certain pressing force on the end of the pressure roller 3.

[0046] Figure 6 and Figure 7 Schematically shows the structure of an air cushion machine according to an embodiment of the present invention.

[0047] The air cushion machine includes a machine body 100 and the aforementioned tensioning structure. The tensioning structure is installed on the machine body 100. Specifically, threaded holes can be formed on the panel 101 of the machine body 100, and external threads adapted to the threaded holes 1011 can be formed at the ends of the shaft member 2 in the tensioning structure. The drum 1 is screwed onto the panel 101 of the machine body 100 through the external threads at the end of the shaft member 2, and the pressure roller 3 is installed on the panel 101 of the machine body.

[0048] Because the thickness of the airbag part far from the panel 101 of the machine body 100 after inflation is greater than that of the inflation channel part, through a large number of experiments, it is found that during the conveying process, the air cushion film will move closer to the panel 101 of the machine body 100, affecting the conveying path. In order to stabilize the conveying path of the air cushion film, the drum 1 is inclined so that the air cushion film moves in the direction away from the panel 101 of the machine body 100, preventing the air cushion film from approaching the panel 101 of the machine body 100. Thus, the deviation of the conveying path caused by the unevenness of the air cushion film is balanced. At the same time, the tensioning effect of the damping member 4 will also weaken the thickness increase of the air cushion film after inflation, further improving the stability of the conveying path of the air cushion film and ensuring the stability of the continuous production of the air cushion film.

[0049] Reference Figure 7 In this embodiment, the included angle a between the drum 1 and the perpendicular line of the panel 101 of the machine body 100 is set to 1 to 15 degrees, and preferably 3 degrees is the best inclination angle. In addition, from the perspective of directly facing the panel 101 of the machine body 100, the inclination of the drum 1 is not necessarily only horizontal, and it can also have a certain inclination in the vertical direction.

[0050] Reference Figure 6 For the air cushion machine of the present invention, the consumable material of the air cushion film, i.e., the inflatable cushion material, is sleeved on the unwinding reel 102 of the air cushion machine in the form of a roll. After the inflatable cushion material passes through the channel between the pressure roller 3 and the sleeve 6 and the limiting channel 10 in sequence, the inflatable tube in the inflation and heat-sealing module 103 of the air cushion machine is inserted into the inflation channel on the inflatable cushion material for inflation operation. At the same time, the pressure roller 3 presses on the inflation channel of the inflatable cushion material. Since the end face of the damping member 4 abuts against the end of the drum 1 or the end of the pressure roller 3, when the inflatable cushion material is unwound, the end of the drum 1 or the end of the pressure roller 3 abuts tightly against the damping member 4 to achieve the purpose of reducing the rotation speed of the drum 1 or the pressure roller 3. When the inflation and heat-sealing module 103 of the air cushion machine pulls the inflated air cushion film, the air cushion film can be tensioned, which plays a role in tensioning the air cushion film, improves the tension of the air cushion film, makes the air cushion film not easy to float during the conveying process, ensures stable conveying, and prevents the situation that part of the air cushion film leaks air or even breaks due to the up and down floating of the air cushion film, thereby ensuring the stability of inflation and the quality of the air cushion film product.

[0051] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. The tension structure for conveying an inflatable cushion material, characterized in that, Comprising: A drum; A shaft member, with the drum sleeved on the shaft member; A rotatable pressure roller, the pressure roller being located above the drum, a channel for conveying an inflated cushion material being formed between the pressure roller and the drum. When an inflated cushion material is accommodated between the pressure roller and the drum, the pressure roller presses on the inflation channel of the inflated cushion material; A damping member, the damping member being sleeved on the shaft member and capable of sliding along the shaft member, the end face of the damping member pressing against the end of the drum, and the drum being rotatably connected to the shaft member, Or, the damping member is sleeved on the rotating shaft of the pressure roller and capable of sliding along the rotating shaft of the pressure roller, the end face of the damping member pressing against the end of the pressure roller; and A sleeve, the sleeve being sleeved on the drum, a channel for conveying an inflated cushion material being formed between the pressure roller and the sleeve, the inflation channel of the air cushion film being located between the pressure roller and the sleeve, and the sleeve being capable of balancing the height of the inflation channel of the air cushion film and the airbag portion so that the air cushion film does not tilt and remains flat and clamped during conveyance.

2. The tensioning structure according to claim 1, characterized in that, It further includes an elastic member, one end of the elastic member being fixed and the other end pressing against the damping member so that the end face of the damping member presses against the end of the drum or the pressure roller.

3. The tensioning structure according to claim 2, characterized in that, The elastic member is a spring, and the spring is sleeved on the shaft member or the rotating shaft of the pressure roller.

4. The tensioning structure according to claim 1, characterized in that, A first elastic layer is provided on the outer periphery of the pressure roller, and a second elastic layer is provided on the outer periphery of the sleeve.

5. The tensioning structure according to claim 1, wherein When the damping member is sleeved on the shaft member, a limiting plane is provided on the shaft member, the damping member is annular, and a limiting portion adapted to the limiting plane is provided on the inner ring of the damping member.

6. The tensioning structure according to claim 1, wherein When the damping member is sleeved on the shaft member, it further includes a first bearing and a second bearing. The inner rings of the first bearing and the second bearing are both sleeved on the shaft member, the outer rings of the first bearing and the second bearing both abut against the inner wall of the drum, and the first bearing is located between the damping member and the second bearing.

7. The tensioning structure according to claim 6, characterized in that, It further includes a retaining ring, the retaining ring being sleeved and fixed on the shaft member and located between the damping member and the first bearing, and the outer diameter of the retaining ring is smaller than the inner diameter of the drum.

8. The tensioning structure according to any one of claims 1 to 7, characterized in that, It further includes a limiting channel, the limiting channel being provided on the side of the drum, and the height of the entrance of the limiting channel is equivalent to the height of the channel for conveying the inflated cushion material between the pressure roller and the drum.

9. The tensioning structure according to claim 8, wherein, It further includes an upper limiting plate and a lower limiting plate which are distributed vertically, and a limiting channel is formed between the upper limiting plate and the lower limiting plate.

10. Air cushion machine, characterized in that, It includes a machine body and the tensioning structure according to any one of claims 1 to 8, the end of the shaft member being provided on the panel of the machine body, and the pressure roller being provided on the panel of the machine body.

11. The air cushion machine according to claim 10, characterized in that, The angle between the drum and the perpendicular line of the panel of the machine body is 1 to 15 degrees.

Images