Figure eight steering stretching device and method of using the same

Abstract

The present invention relates to the technical field of sanitary product processing equipment, and specifically to an eight-shaped steering stretching device and a method for using the same, which is characterized in that it includes a bracket, a drive shaft, a sleeve, a rotating seat, a swing steering assembly, a swing drive component, an adsorption component and an air distribution component, wherein the sleeve is arranged on the bracket, the rotating seat is rotatably sleeved outside the sleeve, the drive shaft is rotatably installed in the sleeve, one end of the drive shaft passes through the sleeve and is fixedly connected to the rotating seat, a plurality of swing steering assemblies are evenly arranged on the outer circumferential surface of the rotating seat, the swing steering assembly includes two swing steering components, the swing drive component is used to drive the two swing steering components to swing synchronously in the opposite direction, the adsorption component is arranged on the swing steering component, and the air distribution component is used to provide negative pressure to the adsorption component and enable the adsorption component to adsorb the elastic band material. The overall structure of the present invention is novel, and two elastic band materials can be adsorbed at the same time, and the production requirements of the eight-shaped steering can be met.

Description

Technical Field

[0001] The invention relates to the technical field of sanitary product processing equipment, and in particular to an eight-shaped steering stretching device and a use method thereof. Background Art

[0002] In the production process of paper sanitary products, such as diapers, in order to ensure the stable wearing of diapers and the close-fitting effect when wearing, it is usually necessary to stick some elastic band materials on the diaper body, such as the waist or the anti-leakage guard of the diaper. In the diaper production line, when the finished elastic waist is attached to the diaper body, it is often necessary to rotate the elastic waist 90° first to facilitate the accurate fit between the elastic waist and the diaper body. Therefore, an elastic waist steering device is usually used in the production line to realize the forward conveyance and steering of the elastic waist. In order to meet people's actual needs, some triangular diapers have also appeared on the market. In order to ensure the anti-leakage effect of the guards on both sides of the diaper, elastic rubber bands are usually provided. Since it is impossible to use the elastic waist steering device for conveyance and steering, it is usually necessary to use some manual processes to produce it. This results in average production efficiency and average comfort of diapers with elastic bands when worn. For this reason, some manufacturers use elastic foam belts to replace the elastic bands. The width of the elastic foam belt is wider than that of the elastic bands, which can improve the comfort of the diapers when worn. Since elastic foam belts are required to be provided on the anti-leakage guards on both sides of the diaper, the two elastic foam belts are arranged in a figure-eight shape on the diaper. Since the existing elastic waist steering device can only transport and steer one elastic waist at a time, it cannot meet the production needs of simultaneously transporting the two elastic foam belts and achieving figure-eight steering. Therefore, in the production and processing of the diaper, a special elastic foam belt figure-eight steering device needs to be designed for transportation and steering, so as to turn the two parallel transported elastic foam belts into a figure-eight shape for transfer for subsequent accurate fitting. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an eight-shaped steering stretching device with a novel overall structure, which can adsorb two elastic belt materials at the same time and meet the production requirements of eight-shaped steering and a method of using the device.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: an eight-shaped steering stretching device, including a bracket, a driving shaft, a sleeve, a rotating seat, a swing steering assembly, a swing drive component, an adsorption component and an air distribution component, the sleeve is fixedly installed on the bracket, the rotating seat is rotatably sleeved outside the sleeve, the driving shaft is rotatably installed in the sleeve, one end of the driving shaft passes through the sleeve and is fixedly connected to the rotating seat, and a plurality of swing steering assemblies are evenly arranged on the outer circumferential surface of the rotating seat along its circumferential direction, the swing steering assembly includes two swing steering assemblies arranged at intervals, the swing drive assembly is used to drive the two swing steering assemblies to swing synchronously in the opposite direction and switch the two swing steering assemblies between a parallel state and an eight-shaped state, the adsorption assembly is arranged on the swing steering assembly, and the air distribution assembly is used to provide negative pressure to the adsorption assembly and enable the adsorption assembly to adsorb the elastic band material.

[0005] Furthermore, two adsorption components are provided on the swing steering component, and the two adsorption components are respectively used to adsorb the two ends of the elastic band material. The two adsorption components are both arranged on the swing steering component through a stretching mechanism, and the stretching mechanism is used to drive the two adsorption components to move synchronously in opposite directions.

[0006] Furthermore, the swing steering assembly includes a swing plate, a rotating shaft and a bearing seat. The bearing seat is fixedly mounted on the rotating seat. The rotating shaft is rotatably mounted on the bearing seat. The upper end of the rotating shaft is fixedly connected to the swing plate. A rotating cavity is provided in the rotating seat. The swing drive assembly is provided in the rotating cavity. The lower end of the rotating shaft is transmission-connected to the swing drive assembly.

[0007] Furthermore, the stretching mechanism includes a stretching plate, a guide rail slider assembly and a stretching drive assembly. There are two stretching plates, both of which are slidably connected to the swing plate through corresponding guide rail slider assemblies. The stretching drive assembly is used to drive the two stretching plates to move synchronously in opposite directions.

[0008] Furthermore, the stretching drive assembly includes a gear and two gear rows, the two gear rows are respectively fixedly mounted on the lower ends of the two stretching plates, the gear is arranged between the two gear rows, the gear and the gear rows are meshed for transmission, the gear is fixedly mounted on the mounting plate, both ends of the mounting plate are fixedly connected to the bearing seat through fixing rods, and two arc-shaped slots are provided on the swing plate for the fixing rods to pass through.

[0009] Furthermore, the swing drive assembly includes a groove wheel, a clamping block, a connecting shaft and a rolling member. The groove wheel is fixedly sleeved on the outside of the shaft sleeve. Two symmetrically arranged annular guide grooves are provided on the outer circumferential surface of the groove wheel. One end of the clamping block is fixedly connected to the lower end of the rotating shaft. The other end of the clamping block is fixedly installed with a connecting shaft. A rotatable rolling member is installed at the lower end of the connecting shaft. The two rolling members on the swing steering assembly are respectively embedded in the two annular guide grooves and are in rolling cooperation with each other.

[0010] Furthermore, after the annular guide groove is unfolded, it includes a first horizontal section and a second horizontal section arranged in parallel and spaced apart. There are two first horizontal sections, and the second horizontal section is arranged between the two first horizontal sections and is connected to the two first horizontal sections respectively through two inclined sections.

[0011] Furthermore, the adsorption assembly includes a first air duct, a bottom shell and an upper cover. The upper cover is fixedly installed on the upper end of the bottom shell and an adsorption cavity is formed between the two. The first air duct is fixedly installed on one side surface of the bottom shell and communicates with the adsorption cavity. The upper end surface of the upper cover is provided with a plurality of adsorption holes communicated with the adsorption cavity.

[0012] Furthermore, the air distribution component includes an air suction plate, an air hood and a second air duct. There are two air suction plates and two air hoods and they are respectively arranged on both sides of the rotating seat. The air hood is sleeved on the outside of the air suction plate and the gap between the two is matched. One of the air suction plates is fixedly mounted on the shaft sleeve, and the other air suction plate is fixedly mounted on the bracket. Both air hoods are fixedly mounted on the rotating seat. A plurality of connecting pipes are fixedly provided on the outer circumferential surface of the air hood along its circumferential direction. The connecting pipes correspond one-to-one to the adsorption components on the corresponding side and are connected through the ventilation duct. The air suction plate is provided with an air suction groove running through its outer circumferential surface. The air suction groove is communicated with part of the connecting pipe. A plurality of through holes communicating with the air suction grooves are provided on one side surface of the air suction plate, and a second air duct is fixedly installed on the air suction plate at the through holes.

[0013] A method for using an eight-shaped steering stretching device, using any of the above-mentioned eight-shaped steering stretching devices for operation, comprising the following steps:

[0014] Step 1: Two elastic band materials arranged in parallel are simultaneously adsorbed by the adsorption components on the two swing steering components, and the two adsorption components on the swing steering components adsorb the two ends of the elastic band materials respectively, and then the swing steering components rotate forward and transport along with the rotation of the rotating seat;

[0015] Step 2: During the rotation of the rotating seat, the two swing steering assemblies can be synchronously swung in the opposite direction under the drive of the swing driving assembly, and the two swing steering assemblies can be switched from a parallel state to an eight-shaped state, thereby realizing that the two elastic band materials are turned from a parallel position to an eight-shaped position. At the same time, during the swing steering assembly swinging and turning process, the two adsorption assemblies on the swing steering assembly can be synchronously moved in the opposite direction under the drive of the stretching mechanism, and the distance between the two can be increased, thereby realizing the stretching of the elastic band material;

[0016] Step 3: The two elastic band materials kept in the figure eight position are rotated forward and transported to the bonding position as the rotating seat rotates, and the elastic band materials are released after bonding;

[0017] Step 4: As the rotating seat continues to rotate, the two swing steering assemblies are driven by the swing driving assembly to swing in the opposite direction synchronously and switch from the figure eight state to the parallel state. At the same time, during the swinging of the swing steering assembly, the two adsorption assemblies on the swing steering assembly are driven by the stretching mechanism to move in the opposite direction synchronously and reduce the distance between them, so that the two adsorption assemblies on the swing steering assembly retract and reset to enter the next cycle.

[0018] From the above description, it can be seen that the overall structure of the figure-eight steering stretching device provided by the present invention is novel. By providing adsorption components on both swinging steering components, under the action of the negative pressure provided by the air distribution component, it is convenient to adsorb the two elastic band materials at the same time, and driven by the swinging drive component, the two swinging steering components can be synchronously swung in opposite directions and switched from a parallel state to a figure-eight state, so that the two elastic band materials are turned from a parallel position to a figure-eight position, and driven by the rotation of the rotating seat, the figure-eight position is maintained and rotated forward to be transported to the fitting position for subsequent accurate fitting, thereby being able to well meet the production requirements of the figure-eight steering of the two elastic band materials and effectively ensure the overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure of the figure eight steering stretching device of the present invention is shown in FIG. Figure 1 .

[0020] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0021] Figure 3 The structure of the figure eight steering stretching device of the present invention is shown in FIG. Figure 2 .

[0022] Figure 4 Schematic diagram of the structure of the adsorption component.

[0023] Figure 5 Schematic diagram of the structure when the swing steering assembly, stretching mechanism and swing drive assembly are connected Figure 1 .

[0024] Figure 6 Schematic diagram of the structure when the swing steering assembly, stretching mechanism and swing drive assembly are connected Figure 2 .

[0025] Figure 7 Schematic diagram of the structure of the stretched plate.

[0026] Figure 8 This is a schematic diagram of the structure after the groove wheel is unfolded.

[0027] Fig. 9It is a schematic diagram of the structure when the gear and the gear row are meshing for transmission.

[0028] Fig.10 It is a schematic diagram of the structure of the swing plate.

[0029] Fig.11 It is a schematic diagram of the state when the swing steering assembly switches between the parallel state and the figure eight state.

[0030] In the figure: 1- bracket; 21- driving shaft; 22- bushing; 3- rotating seat; 31- rotating chamber; 4- swing steering assembly; 41- swing plate; 411- arc notch; 42- rotating shaft; 43- bearing seat; 5- swing driving assembly; 51- groove wheel; 511- annular guide groove; 5111- first horizontal section; 5112- second horizontal section; 5113- inclined section; 52- clamping block; 53- connecting shaft; 54- rolling element; 6- adsorption assembly; 6 1-first air duct; 62-bottom shell; 621-adsorption chamber; 63-upper cover; 631-adsorption hole; 7-air distribution assembly; 71-air suction plate; 711-air suction slot; 712-through hole; 72-wind cover; 721-connecting pipe; 73-second air duct; 8-stretching mechanism; 81-stretching plate; 82-guide rail slider assembly; 83-stretching drive assembly; 831-gear; 832-tooth row; 833-mounting plate; 834-fixing rod; 9-elastic belt material. DETAILED DESCRIPTION

[0031] The present invention is further described below through specific implementation modes.

[0032] like Figures 1 to 11 As shown, an eight-shaped steering stretching device described in the present invention includes a bracket 1, a drive shaft 21, a sleeve 22, a rotating seat 3, a swing steering assembly, a swing drive component 5, an adsorption component 6 and an air distribution component 7, wherein the sleeve 22 is fixedly mounted on the bracket 1, the rotating seat 3 is rotatably sleeved outside the sleeve 22, the drive shaft 21 is rotatably mounted inside the sleeve 22, one end of the drive shaft 21 passes through the sleeve 22 and is fixedly connected to the rotating seat 3, a plurality of groups of the swing steering assemblies are evenly arranged on the outer circumferential surface of the rotating seat 3 along its circumferential direction, the swing steering assembly includes two swing steering assemblies 4 arranged at intervals, the swing drive component 5 is used to drive the two swing steering assemblies 4 to swing synchronously in the opposite direction and switch the two swing steering assemblies 4 between a parallel state and an eight-shaped state, the adsorption component 6 is arranged on the swing steering assembly 4, and the air distribution component 7 is used to provide negative pressure to the adsorption component 6 and enable the adsorption component 6 to adsorb the elastic band material 9.

[0033] By providing the adsorption component 6 on both of the two swinging and steering components 4, under the action of the negative pressure provided by the air distribution component 7, it is convenient to adsorb the two elastic band materials 9 at the same time, and driven by the swing driving component 5, the two swinging and steering components 4 can be synchronously swung in the opposite direction and switched from a parallel state to an eight-shaped state, so that the two elastic band materials 9 are turned from a parallel position to an eight-shaped position, and driven by the rotation of the rotating seat 3, the eight-shaped position is maintained and rotated forward to be transported to the fitting position for subsequent accurate fitting, thereby meeting the production requirements of the eight-shaped steering of the two elastic band materials 9 and effectively ensuring the overall production efficiency.

[0034] Preferably, the number of the swing steering assemblies is 6-10, one end of the drive shaft 21 is transmission-connected to the drive motor, so as to facilitate driving the rotating seat 3 to rotate, and the elastic belt material 9 can be an elastic foam belt.

[0035] In addition, the rotating seat 3 is rotatably mounted outside the shaft sleeve 22 via a first bearing, and the driving shaft 21 is rotatably mounted inside the shaft sleeve 22 via a second bearing.

[0036] like Figure 3 As shown, preferably, two adsorption components 6 are provided on the swing steering component 4, and the two adsorption components 6 are respectively used to adsorb the two ends of the elastic band material 9, and the two adsorption components 6 are both provided on the swing steering component 4 through a stretching mechanism 8, and the stretching mechanism 8 is used to drive the two adsorption components 6 to move synchronously in the opposite direction. Since the elastic band material 9 will be in a contracted state when relaxed, the setting of the stretching mechanism 8 is convenient to drive the two adsorption components 6 on the swing steering component 4 to move synchronously in the opposite direction. When the distance between the two adsorption components 6 is increased, the elastic band material 9 can be stretched accordingly to ensure that the elastic band material 9 is in a stretched state when in the fitting position. After fitting, the anti-side leakage guards on both sides of the diaper can be wrinkled after relaxation, so as to further make the anti-side leakage guards have better elastic expansion and contraction effect, thereby achieving a better fitting effect during use.

[0037] like Figure 5 and Figure 6As shown, specifically, the swing steering assembly 4 includes a swing plate 41, a rotating shaft 42 and a bearing seat 43, the bearing seat 43 is fixedly mounted on the rotating seat 3, the rotating shaft 42 is rotatably mounted on the bearing seat 43, the upper end of the rotating shaft 42 is fixedly connected with the swing plate 41, a rotating chamber 31 is provided in the rotating seat 3, the swing driving assembly 5 is arranged in the rotating chamber 31, and the lower end of the rotating shaft 42 is transmission-connected with the swing driving assembly 5, thereby the rotating shaft 42 can be driven to rotate by the swing driving assembly 5, thereby driving the swing plate 41 to swing and steer, and thereby making the two adsorption assemblies 6 on the swing plate 41 swing and steer together, in addition, the rotating shaft 42 is rotatably mounted in the bearing seat 43 through a third bearing.

[0038] like Figure 5 , Figure 6 and Figure 7 As shown, specifically, the stretching mechanism 8 includes a stretching plate 81, a guide rail slider assembly 82 and a stretching drive assembly 83. There are two stretching plates 81, and both are slidably connected to the swing plate 41 through the corresponding guide rail slider assembly 82. The stretching drive assembly 83 is used to drive the two stretching plates 81 to move synchronously in the opposite direction. The two adsorption assemblies 6 are respectively arranged on the two stretching plates 81. Through the arrangement of the guide rail slider assembly 82, a corresponding guiding effect can be played on the movement of the stretching plate 81, and the stability and smoothness of the movement of the stretching plate 81 can be effectively ensured. At the same time, the stretching drive assembly 83 drives the two adsorption assemblies 6 to move synchronously in the opposite direction, thereby changing the distance between the two adsorption assemblies 6.

[0039] like Figure 6 , Fig. 9 and Fig.10As shown, specifically, the stretching drive assembly 83 includes a gear 831 and two tooth rows 832, the two tooth rows 832 are fixedly installed on the lower ends of the two stretching plates 81, the gear 831 is arranged between the two tooth rows 832, the gear 831 and the tooth row 832 are meshed for transmission, the gear 831 is fixedly installed on the mounting plate 833, both ends of the mounting plate 833 are fixedly connected to the bearing seat 43 through a fixing rod 834, that is, the gear 831 and the bearing seat 43 are both in a fixed state, when the swing plate 41 follows the rotation of the rotating shaft 42 to swing and turn, the stretching plate 81 will also swing and turn together, and the two tooth rows 832 will rotate around the gear 831 relatively, through the meshing transmission of the tooth row 832 and the gear 831, the two stretching plates 81 will also move synchronously in the opposite direction while swinging and turning, thereby This changes the spacing between the two stretching plates 81, that is, changes the spacing between the two adsorption components 6. By adopting this structure, the structure is simple, practical and reliable, and no additional driving source is required to drive the movement of the stretching plate 81. The movement of the stretching plate 81 is achieved by utilizing the swinging and turning of the swing plate 41, which can accurately ensure that the two stretching plates 81 move synchronously in opposite directions while swinging and turning, thereby ensuring the precision and accuracy of the steering and stretching action of the steering and stretching device. In addition, the swing plate 41 is provided with two arc-shaped notches 411 for the fixing rod 834 to pass through, thereby avoiding interference with the fixing rod 834 during the swinging of the swing plate 41. In addition, a fourth bearing is provided between the rotating shaft 42 and the gear 831 and the mounting plate 833 to further ensure the stability of the mounting position of the gear 831 and the mounting plate 833.

[0040] like Figure 7 As shown, in addition, preferably, the stretching plate 81 is in an L shape, so as to ensure the stable installation of the adsorption component 6 while also ensuring the stable installation of the tooth row 832.

[0041] In addition, the guide rail slider assembly 82 includes a guide rail and two sliders, the sliders are adapted to the guide rail and the two are slidably matched. In this embodiment, the guide rail is fixedly installed on the upper end of the swing plate 41, and the sliders are fixedly installed on the lower end of the tooth row 832. Since the tooth row 832 is fixedly installed on the lower end of the stretching plate 81, a sliding connection between the stretching plate 81 and the swinging plate 41 is achieved.

[0042] like Figure 1 , Figure 5 and Figure 6As shown, specifically, the swing drive assembly 5 includes a groove wheel 51, a clamping block 52, a connecting shaft 53 and a rolling element 54. The groove wheel 51 is fixedly sleeved on the outer side of the shaft sleeve 22. Two symmetrically arranged annular guide grooves 511 are provided on the outer circumferential surface of the groove wheel 51. One end of the clamping block 52 is fixedly connected to the lower end of the rotating shaft 42. The other end of the clamping block 52 is fixedly installed with the connecting shaft 53. The lower end of the connecting shaft 53 is installed with a rotatable rolling element 54. The two rolling elements 54 on the swing steering assembly are respectively embedded in two The annular guide groove 511 and the two are rollingly matched. By adopting this structure, when the rolling element 54 moves in the annular guide groove 511 with the rotation of the rotating seat 3, the relative position between the connecting shaft 53 and the rotating shaft 42 can be changed, and the rotation of the rotating shaft 42 is driven by the clamping block 52, thereby driving the swing plate 41 to swing and turn, thereby realizing the corresponding two swinging and steering components 4 switching between the parallel state and the figure eight state. In addition, preferably, the rolling element 54 is a needle bearing.

[0043] like Figure 8 and Fig.11 As shown, specifically, the annular guide groove 511 comprises a first horizontal section 5111 and a second horizontal section 5112 arranged in parallel and spaced apart after being unfolded. There are two first horizontal sections 5111, and the second horizontal section 5112 is arranged between the two first horizontal sections 5111 and connected to the two first horizontal sections 5111 respectively through two inclined sections 5113. When the rolling element 54 is in the first horizontal section 5111, at this time, the two swing steering assemblies 4 are in a parallel state. When the rolling element 54 is in the second horizontal section 5112, At this time, the two swing steering components 4 are in an eight-shaped state, and the spacing between the first horizontal section 5111 and the second horizontal section 5112 can be set so that the angle between the two swing steering components 4 after swing steering is between 40° and 50°, and the inclined section 5113 is used to play a transition role. In addition, in this embodiment, the spacing between the second horizontal sections 5112 on the two annular guide grooves 511 is smaller than the spacing between the first horizontal sections 5111 on the two annular guide grooves 511.

[0044] like Figure 4As shown, specifically, the adsorption assembly 6 includes a first air duct 61, a bottom shell 62 and an upper cover 63, the upper cover 63 is fixedly installed on the upper end of the bottom shell 62 and an adsorption chamber 621 is formed between the two, the first air duct 61 is fixedly installed on one side surface of the bottom shell 62 and communicates with the adsorption chamber 621, the upper end surface of the upper cover 63 is provided with a plurality of adsorption holes 631 communicated with the adsorption chamber 621, so that the elastic band material 9 can be well adsorbed on the upper end surface of the upper cover 63, in addition, the bottom shell 62 is fixedly installed on the stretching plate 81, preferably, the upper end surface of the upper cover 63 is an inclined surface and the side with the adsorption holes 631 is lower than the other side, thereby forming a shape with a high middle and low sides between the upper ends of the two upper covers 63, which is beneficial to further improve the stability of the elastic band material 9 when being adsorbed, in addition, preferably, the number of the adsorption holes 631 is 4-6.

[0045] like Figure 1 and Figure 2 As shown, specifically, the air distribution component 7 includes an air suction plate 71, an air cover 72 and a second air duct 73. The air suction plate 71 and the air cover 72 are both two and are respectively arranged on both sides of the rotating seat 3. The air cover 72 is sleeved on the outer side of the air suction plate 71 and the gap between the two is matched. One of the air suction plates 71 is fixedly mounted on the shaft sleeve 22, and the other air suction plate 71 is fixedly mounted on the bracket 1. The two air covers 72 are fixedly mounted on the rotating seat 3. A plurality of connecting pipes 721 are fixedly provided on the outer circumferential surface of the air cover 72 along its circumferential direction. The connecting pipes 721 correspond to the adsorption components 6 on the corresponding side one by one and are connected through the ventilation duct, that is, the connecting pipe 721 is connected to the first air duct 61 on the adsorption component 6 through the corresponding ventilation duct. At the same time, since the air cover 72 can rotate together with the rotating seat 3, the connecting pipe 721 and the first air duct can be well maintained. 61, so as to facilitate the stable installation and arrangement of the ventilation duct. In addition, the air suction plate 71 is provided with an air suction groove 711 running through its outer circumference, and the air suction groove 711 is communicated with part of the connecting pipe 721. One side surface of the air suction plate 71 is provided with a plurality of through holes 712 communicated with the air suction groove 711. The air suction plate 71 is fixedly installed with a second air duct 73 at the through hole 712. The second air duct 73 is used to be connected with a negative pressure source, so as to maintain negative pressure on the air suction groove 711. When the rotating seat 3 makes the corresponding part of the connecting pipe 721 communicate with the air suction groove 711 during the rotation process, negative pressure can be generated in the corresponding part of the adsorption component 6, so as to achieve stable adsorption of the elastic band material 9. At the same time, the corresponding remaining connecting pipes 721 will be staggered with the air suction groove 711, so that the negative pressure in the corresponding remaining adsorption components 6 disappears, so as to facilitate the release of the elastic band material 9.

[0046] In addition, in this embodiment, the bracket 1 includes a fixed plate, a mounting seat and a front side plate, that is, the sleeve 22 is fixedly mounted on the fixed plate, the mounting seat is arranged below the sleeve 22 and fixedly mounted on the fixed plate, the front side plate is fixedly mounted on the mounting seat, and another air suction plate 71 is fixedly mounted on the front side plate. In addition, one end of the drive shaft 21 is also rotatably mounted on the front side plate through a seat bearing. The rotating seat 3 includes a seat body and a cover plate, and the seat body is provided with a rotating chamber 31 open to one side, and the cover plate is fixedly mounted at the opening of the rotating chamber 31, that is, one of the wind hoods 72 is fixedly connected to the seat body, and the other wind hood 72 is fixedly connected to the cover plate. In addition, the seat body is mounted on the sleeve 22 through a first bearing, thereby realizing the rotation connection between the rotating seat 3 and the sleeve 22, and the cover plate is fixedly connected to the drive shaft 21 through a sleeve, thereby realizing the fixed connection between the drive shaft 21 and the rotating seat 3.

[0047] In addition, preferably, the number of the through holes 712 on the air suction plate 71 is 3-5.

[0048] A method for using an eight-shaped steering stretching device, using any one of the above-mentioned eight-shaped steering stretching devices for operation, comprising the following steps:

[0049] Step 1: Two elastic band materials 9 arranged in parallel are simultaneously adsorbed by the adsorption components 6 on the two swing steering components 4, and the two adsorption components 6 on the swing steering components 4 adsorb the two ends of the elastic band material 9 respectively, and then, the swing steering components 4 rotate forward and transport along with the rotation of the rotating seat 3;

[0050] Step 2: During the rotation of the rotating seat 3, the two swing steering assemblies 4 can be synchronously swung in the opposite direction under the drive of the swing driving assembly 5, and the two swing steering assemblies 4 can be switched from the parallel state to the figure eight state, so that the two elastic band materials 9 can be turned from the parallel position to the figure eight position. At the same time, during the swing steering assembly 4 swinging and steering, the two adsorption assemblies 6 on the swing steering assembly 4 can be synchronously moved in the opposite direction under the drive of the stretching mechanism 8, and the distance between the two can be increased, so as to achieve the stretching of the elastic band material 9;

[0051] Step 3: The two elastic band materials 9 kept in the figure eight position are rotated forward and transported to the bonding position as the rotating base 3 rotates, and the elastic band materials 9 are released after bonding;

[0052] Step 4: With the continuous rotation of the rotating seat 3, the two swinging steering assemblies 4 are driven by the swinging driving assembly 5 to swing in the opposite direction synchronously and switch from the figure eight state to the parallel state. Meanwhile, during the swinging of the swinging steering assembly 4, the two adsorption assemblies 6 on the swinging steering assembly 4 are driven by the stretching mechanism 8 to move in the opposite direction synchronously and reduce the distance between them, so that the two adsorption assemblies 6 on the swinging steering assembly 4 retract and reset to enter the next cycle.

[0053] The above are only some specific implementation methods of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. Figure eight steering stretching device, characterized by: The invention comprises a bracket, a driving shaft, a sleeve, a rotating seat, a swing steering assembly, a swing driving component, an adsorption component and an air distribution component, wherein the sleeve is fixedly mounted on the bracket, the rotating seat is rotatably sleeved outside the sleeve, the driving shaft is rotatably mounted inside the sleeve, one end of the driving shaft passes through the sleeve and is fixedly connected to the rotating seat, a plurality of groups of the swing steering assemblies are evenly arranged on the outer circumferential surface of the rotating seat along its circumferential direction, the swing steering assembly comprises two swing steering assemblies arranged at intervals, the swing driving component is used to drive the two swing steering assemblies to swing synchronously in the opposite direction and switch the two swing steering assemblies between a parallel state and an eight-shaped state, the adsorption component is arranged on the swing steering assembly, the air distribution component is used to provide negative pressure to the adsorption component and enable the adsorption component to adsorb the elastic band material, the swing steering assembly is provided with two adsorption components, the two adsorption components are respectively used to adsorb the two ends of the elastic band material, the two adsorption components are arranged on the swing steering assembly through a stretching mechanism, and the stretching mechanism is used to drive the two adsorption components to move synchronously in the opposite direction.

2. The figure eight steering stretching device according to claim 1, characterized in that: The swing steering assembly includes a swing plate, a rotating shaft and a bearing seat, the bearing seat is fixedly mounted on the rotating seat, the rotating shaft is rotatably mounted on the bearing seat, the upper end of the rotating shaft is fixedly connected to the swing plate, a rotating cavity is provided in the rotating seat, the swing drive assembly is arranged in the rotating cavity, and the lower end of the rotating shaft is transmission-connected to the swing drive assembly.

3. The figure eight steering stretching device according to claim 2, characterized in that: The stretching mechanism comprises a stretching plate, a guide rail slider assembly and a stretching drive assembly. There are two stretching plates, both of which are slidably connected to the swing plate through the corresponding guide rail slider assembly. The stretching drive assembly is used to drive the two stretching plates to move synchronously in opposite directions.

4. The figure eight steering stretching device according to claim 3, characterized in that: The stretching drive assembly includes a gear and two gear rows, the two gear rows are fixedly installed on the lower ends of the two stretching plates respectively, the gear is arranged between the two gear rows, the gear is meshed with the gear rows for transmission, the gear is fixedly installed on the mounting plate, both ends of the mounting plate are fixedly connected to the bearing seat through a fixing rod, and the swing plate is provided with two arc-shaped slots for the fixing rod to pass through.

5. The figure eight steering stretching device according to claim 2, characterized in that: The swing drive assembly includes a groove wheel, a clamping block, a connecting shaft and a rolling element. The groove wheel is fixedly sleeved on the outside of the shaft sleeve. Two symmetrically arranged annular guide grooves are provided on the outer circumferential surface of the groove wheel. One end of the clamping block is fixedly connected to the lower end of the rotating shaft. The other end of the clamping block is fixedly installed with the connecting shaft. The lower end of the connecting shaft is rotatably installed with the rolling element. The two rolling elements on the swing steering assembly are respectively embedded in the two annular guide grooves and are rollingly matched with each other.

6. The figure eight steering stretching device according to claim 5, characterized in that: After being unfolded, the annular guide groove comprises a first horizontal section and a second horizontal section which are arranged in parallel and spaced apart. There are two first horizontal sections, and the second horizontal section is arranged between the two first horizontal sections and is respectively connected to the two first horizontal sections through two inclined sections.

7. The figure eight steering stretching device according to claim 1, characterized in that: The adsorption assembly includes a first air duct, a bottom shell and an upper cover. The upper cover is fixedly installed on the upper end of the bottom shell and an adsorption cavity is formed between the two. The first air duct is fixedly installed on one side surface of the bottom shell and communicates with the adsorption cavity. The upper end surface of the upper cover is provided with a plurality of adsorption holes communicated with the adsorption cavity.

8. The figure eight steering stretching device according to claim 1, characterized in that: The air distribution assembly comprises an air suction plate, an air hood and a second air duct, wherein the air suction plate and the air hood are two and are respectively arranged on both sides of the rotating seat, the air hood is sleeved on the outside of the air suction plate and there is a gap between the two, one of the air suction plates is fixedly mounted on the shaft sleeve, and the other of the air suction plates is fixedly mounted on the bracket, and the two air hoods are fixedly mounted on the rotating seat, a plurality of connecting pipes are fixedly provided on the outer circumferential surface of the air hood along its circumferential direction, the connecting pipes correspond one to one with the adsorption assembly on the corresponding side and are connected through a ventilation duct, the air suction plate is provided with an air suction groove running through its outer circumferential surface, the air suction groove is communicated with part of the connecting pipe, a plurality of through holes communicated with the air suction groove are provided on one side surface of the air suction plate, and the second air duct is fixedly mounted on the air suction plate at the through holes.

9. The method for using the figure eight steering stretching device is characterized by: The operation of the figure eight steering stretching device according to any one of claims 1 to 8 comprises the following steps: Step 1: Two elastic band materials arranged in parallel are simultaneously adsorbed by the adsorption components on the two swing steering components, and the two adsorption components on the swing steering components adsorb the two ends of the elastic band materials respectively, and then the swing steering components rotate forward and transport along with the rotation of the rotating seat; Step 2: During the rotation of the rotating seat, the two swing steering assemblies can be synchronously swung in the opposite direction under the drive of the swing driving assembly, and the two swing steering assemblies can be switched from a parallel state to an eight-shaped state, thereby realizing that the two elastic band materials are turned from a parallel position to an eight-shaped position. At the same time, during the swing steering assembly swinging and turning process, the two adsorption assemblies on the swing steering assembly can be synchronously moved in the opposite direction under the drive of the stretching mechanism, and the distance between the two can be increased, thereby realizing the stretching of the elastic band material; Step 3: The two elastic band materials kept in the figure eight position are rotated forward and transported to the bonding position as the rotating seat rotates, and the elastic band materials are released after bonding; Step 4: As the rotating seat continues to rotate, the two swing steering assemblies are driven by the swing driving assembly to swing in the opposite direction synchronously and switch from the figure eight state to the parallel state. At the same time, during the swinging of the swing steering assembly, the two adsorption assemblies on the swing steering assembly are driven by the stretching mechanism to move in the opposite direction synchronously and reduce the distance between them, so that the two adsorption assemblies on the swing steering assembly retract and reset to enter the next cycle.

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