Fully automatic sewing method for attaching elastic bands

Abstract

The present invention discloses a fully automatic method for sewing elastic bands, which includes: Step 1, one end of the elastic band is pulled by a material pulling mechanism to a set length, and two pairs of clips of a flipping mechanism are respectively clamped on the area of the elastic band corresponding to the region between the material pulling mechanism and the material cutting mechanism. Subsequently, the material cutting mechanism cuts off the other end of the elastic band; Step 2, the flipping mechanism clamps the cut elastic band strip and flips it upwards relatively, so that the two ends of the elastic band strip are overlapped to form an unstitched elastic band loop. The unstitched elastic band loop is arranged around the sewing platform and located in the material waiting area, and the unstitched elastic band loop is pressed by a material feeding mechanism. Subsequently, the clips of the flipping mechanism open and reset downwards; Step 3, the material feeding mechanism presses the unstitched elastic band loop and pushes it forward to the sewing area, and the unstitched elastic band loop is positioned in the sewing area by a material pressing mechanism. Subsequently, the material feeding mechanism releases the pressing on the unstitched elastic band loop and resets backwards; Step 4, the unstitched elastic band loop is sewn and fixed at the overlapping part of the two ends by a sewing machine head in the sewing area to obtain a stitched elastic band loop.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic rubber band connection, and in particular to a fully automatic sewing rubber band connection method. Background Art

[0002] A rubber band connecting machine refers to a sewing machine that sews and joins the two ends of a rubber band with a set length to form a ring. It is currently widely used. Generally, the rubber band connecting machines on the market can achieve automatic feeding and automatic rubber band connection. Compared with the early method of relying on manual placement of rubber bands on the sewing machine and then sewing, its production efficiency has been greatly improved.

[0003] The structure of the existing rubber band connecting machine, for example: CN 112030383 A discloses a rubber band connecting machine. The rubber band sewing process: cut the rubber band, and then the rotation drive part rotates forward. Through the transmission of the first synchronous wheel, the synchronous belt, and the second synchronous wheel, the entire clamping cylinder flips around the rotation axis, and both clamping heads rotate from the position below the sewing platform to the position above the sewing platform. The end of the rubber band on the clamping head fits against the inclined surface of the alignment plate, and the gas in the air pipe continuously sprays out from the air outlet holes, and the end of the rubber band tightly fits against the inclined surface, restricting the upward warping of the rubber band. The sliding drive part drives the mounting table to move towards the sewing head side, and the clamping head also drives the rubber band to move along the inclined surface towards the lower part of the sewing head, and the rubber band will be located on the sewing groove. The sewing presser foot presses the end of the rubber band tightly on the sewing platform downward. The alignment drive assembly drives the alignment plate to move towards the sewing head side, and the alignment end at the end of the alignment plate can exert a butting effect on the two ends of the rubber band to ensure that the two ends of the rubber band are flush. The sewing head sews the two ends of the rubber band; at the same time, the alignment drive assembly drives the alignment plate to reset to the initial position, the sliding drive part drives the mounting table to reset to the initial position, and the rotation drive part resets the clamping jaws to the initial position, and then continues to clamp the next rubber band to be sewn; the sewing presser foot releases the previously sewn rubber band ring, and the rubber band ring will be sleeved on the sewing platform. The clamping jaw drives the next rubber band strip to be sewn to exert a thrust on the previously sewn rubber band ring that has been sewn, and automatically pushes the sewn rubber band ring out of the sewing platform. The sewn rubber band ring will fall into the receiving rod of the receiving mechanism.

[0004] However, since the clamping head drives the rubber band to the lower part of the sewing head, after sewing the previous rubber band strip, it takes a long time to wait for feeding, which limits the overall production efficiency of the machine and is difficult to further improve.

[0005] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the Invention

[0006] In view of this, in view of the deficiencies of the existing technology, the main object of the present invention is to provide a fully automatic sewing method for connecting elastic bands. By setting a material waiting area, the turning mechanism only needs to feed materials to the material waiting area, and the feeding mechanism is used to send the materials in the material waiting area to the sewing area, saving the waiting idle time in the sewing area and effectively improving the efficiency.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A fully automatic sewing method for connecting elastic bands, in which a sewing area and a material waiting area are arranged at the front and rear intervals on a sewing platform; a material cutting mechanism and a material pulling mechanism are respectively arranged on the left and right sides of the sewing platform, and the material cutting mechanism and the material pulling mechanism are arranged corresponding to the left and right sides of the material waiting area; a turning mechanism is arranged below the sewing platform; a feeding mechanism, a material pressing mechanism and a sewing machine head are arranged above the sewing platform;

[0009] The fully automatic sewing method for connecting elastic bands includes the following steps:

[0010] Step 1: One end of the elastic band is pulled by the material pulling mechanism to a set length, and two pairs of clips of the turning mechanism are respectively clamped on the area of the elastic band between the material pulling mechanism and the material cutting mechanism, and then the material cutting mechanism cuts off the other end of the elastic band;

[0011] Step 2: The turning mechanism clamps the cut elastic band strip and turns it upward relatively, so that the two ends of the elastic band strip are close to or overlap and lap to form an unstitched elastic band ring. The unstitched elastic band ring is arranged around the sewing platform and located in the material waiting area, and the feeding mechanism presses the unstitched elastic band ring, and then the clips of the turning mechanism open and reset downward;

[0012] Step 3: The feeding mechanism presses the unstitched elastic band ring and pushes it forward to the sewing area, and the material pressing mechanism positions the unstitched elastic band ring in the sewing area, and then the feeding mechanism releases the pressing action on the unstitched elastic band ring and resets backward;

[0013] Step 4: The unstitched elastic band ring is sewn and fixed at the overlapping part of the two ends by the sewing machine head in the sewing area to obtain a stitched elastic band ring.

[0014] As a preferred solution, in step 3, when the feeding mechanism sends the elastic band from the rear side near the sewing area to the sewing area, the pre-pushing part at the front end of the feeding mechanism pushes the previous stitched elastic band ring forward, and completes the blanking action of the previous stitched elastic band ring while feeding.

[0015] As a preferred solution, an elastic band ring collection bin is arranged in front of the sewing platform, and in step 3, the pre-pushing part at the front end of the feeding mechanism pushes the previous stitched elastic band ring from the sewing area and drops it into the elastic band ring collection bin.

[0016] As a preferred solution, during cyclic operation, the action in Step 1 and the feeding action in Step 3 are carried out simultaneously; the reset action of the feeding mechanism in Step 3 and the upward relative flipping action of the flipping mechanism in Step 2 are carried out simultaneously; the sewing action in Step 4 and the feeding and reset actions of the feeding mechanism in Step 3 are carried out simultaneously.

[0017] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly sets a waiting material area. The flipping mechanism only needs to load materials to the waiting material area, and the feeding mechanism is used to send the materials in the waiting material area to the sewing area, saving the waiting idle time in the sewing area and effectively improving the efficiency.

[0018] To more clearly elaborate on the structural features and functions of the present invention, the present invention will be described in detail below in conjunction with the drawings and specific embodiments. Description of the Drawings

[0019] Figure 1 is a three-dimensional view of an embodiment of the present invention;

[0020] Figure 2 is a front view of an embodiment of the present invention;

[0021] Figure 3 is a top view of an embodiment of the present invention;

[0022] Figure 4 is a three-dimensional view of the material cutting mechanism of an embodiment of the present invention;

[0023] Figure 5 is a three-dimensional view of the material pulling mechanism of an embodiment of the present invention;

[0024] Figure 6 is a partial structural view of an embodiment of the present invention (including a sewing platform, a sewing machine head, a flipping mechanism, a feeding mechanism, and a material pressing mechanism);

[0025] Figure 7 is another partial structural view of an embodiment of the present invention (including a sewing platform, a sewing machine head, a flipping mechanism, a feeding mechanism, and a material pressing mechanism);

[0026] Figure 8 is Figure 7 an exploded view of the structure shown;

[0027] Figure 9 is a structural view of the moving mechanism, the material pressing mechanism, and the left and right driving devices of an embodiment of the present invention;

[0028] Figure 10 is a structural view of the flipping mechanism of an embodiment of the present invention.

[0029] Description of the drawing reference numerals: frame 1, sewing head 2, sewing platform 3, sewing area 4, loading area 5, moving mechanism 6, upper feeding clamp 7, lower feeding clamp 8, lifting cylinder 9, pressing arm 10, pushing arm 11, pre-pushing part 12, first motor 13, driving wheel 14, synchronous belt 15, translation base 16, first slider 17, first slide rail 18, upper pressing frame 19, lower pressing frame 20, pressing frame cylinder 21, cylinder base 22, second motor 23, gear 24, rack 25, adapter seat 26, second slide rail 27, second slider 28, mounting shell 29, flipping mechanism 30, clamping cylinder 31, chuck 32, gear 33, vertical rack 34, lifting cylinder 35, swing arm 36, circular shaft joint part 361, first arm body part 362, second arm body part 363, vertical plate 37, limiting plate 371, L-shaped bracket 372, extension plate 373, cutting mechanism frame 41, feeding channel 42, cutting cylinder 43, cutting action part 44, cutting mechanism 45, pulling mechanism 46, feeding mechanism 47, pressing mechanism 48, rubber band ring collection bin 49, pulling clamp 461, pulling translation driving device 462, pulling cylinder 463. Detailed implementation manners

[0030] Please refer to Figures 1 to 10 as shown, which shows the specific structure of the embodiment of the present invention.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the 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 to the present invention.

[0032] A fully automatic sewing and rubber band connecting method, in which a sewing area 4 and a material waiting area 5 are arranged at the front and rear intervals on the sewing platform 3; a cutting mechanism 45 and a pulling mechanism 46 are respectively arranged on the left and right sides of the sewing platform 3, and the cutting mechanism 45 and the pulling mechanism 46 are arranged corresponding to the left and right sides of the material waiting area 5; a flipping mechanism 30 is arranged below the sewing platform 3; a feeding mechanism 47, a pressing mechanism 48 and a sewing head 2 are arranged above the sewing platform 3;

[0033] The fully automatic sewing and rubber band connecting method includes the following steps:

[0034] Step 1, one end of the rubber band is pulled by the pulling mechanism 46 to a set length, and two pairs of clips of the flipping mechanism 30 are respectively clamped on the area of the rubber band corresponding to the pulling mechanism 46 and the cutting mechanism 45, and then the cutting mechanism 45 cuts off the other end of the rubber band;

[0035] Step 2: The flipping mechanism 30 clamps the cut rubber band strip and flips it upwards relatively, so that the two ends of the rubber band strip are close to or overlapped and lapped to form an unstitched rubber band loop. The unstitched rubber band loop surrounds the sewing platform 3 and is located in the material waiting area 5, and is pressed by the feeding mechanism 47. Then, the clamp of the flipping mechanism 30 opens and resets downward.

[0036] Step 3: The feeding mechanism 47 presses the unstitched rubber band loop and pushes it forward to the sewing area 4, and the material pressing mechanism 48 positions the unstitched rubber band loop in the sewing area 4. Then, the feeding mechanism 47 releases the pressing action on the unstitched rubber band loop and resets backward.

[0037] Step 4: The two ends of the overlapping part of the unstitched rubber band loop are sewn and fixed by the sewing machine head in the sewing area 4 to obtain a stitched rubber band loop.

[0038] In Step 3, during the process of the feeding mechanism 47 feeding the rubber band from the rear side near the sewing area 4 to the sewing area 4, the pre-feeding part at the front end of the feeding mechanism 47 pushes the previous stitched rubber band loop forward, and the blanking action of the previous stitched rubber band loop is completed while feeding.

[0039] A rubber band loop collection bin 49 is arranged in front of the sewing platform 3. In Step 3, the pre-feeding part 12 at the front end of the feeding mechanism pushes the previous stitched rubber band loop from the sewing area 4 and drops it into the rubber band loop collection bin. The rubber band loop collection bin 49 has a bottom rotating disk and a number of sleeve rods arranged on the top of the bottom rotating disk. The sleeve rods are arranged at intervals along the circumferential direction of the bottom rotating disk. Each sleeve rod extends vertically, and the top of the sleeve rod is connected with a guiding rod that extends obliquely upwards towards the front end of the sewing platform 3, which is convenient for the stitched rubber band loop to be sleeved on the sleeve rod. After a sleeve rod is filled with rubber band loops, the bottom rotating disk rotates, so that another empty sleeve rod rotates to the set position in front of the sewing platform 3 and continues to undertake the material receiving work, so that the material receiving is neat and orderly.

[0040] During cyclic operation, the action of Step 1 and the feeding action of Step 3 are carried out simultaneously. The reset action of the feeding mechanism 47 in Step 3 and the upward relative flipping action of the flipping mechanism 30 in Step 2 are carried out simultaneously. The sewing action in Step 4 and the feeding and reset actions of the feeding mechanism 47 in Step 3 are carried out simultaneously.

[0041] Refer to Figures 1 to 4 As shown, the material cutting mechanism 45 includes a material cutting mechanism 45 frame 41 and a feeding channel 42 arranged on the material cutting mechanism 45 frame 41. A cutting unit is arranged on the material cutting mechanism 45 frame 41 corresponding to the output end of the feeding channel 42.

[0042] The cutting unit includes a cutting cylinder 43 and two cutting action parts 44 arranged vertically opposite to each other. The cutting cylinder 43 is installed below the output end of the feeding channel 42 on the frame 41 of the cutting mechanism 45, and the position where the cutting cylinder 43 is located is lower than the height of the feeding channel 42. The piston rod of the cutting cylinder 43 extends upward and can move up and down. The piston rod is connected to act on any one of the cutting action parts 44, so that the cutting action part 44 moves in the vertical direction towards the other cutting action part 44 to cut the material.

[0043] On the frame 41 of the cutting mechanism 45, there is a vertical frame plate 51 corresponding to the output end of the feeding channel 42. The cutting cylinder 43 is installed on the left side of the vertical frame plate 51. Its structure is simple, which is convenient for the installation of the cutting cylinder 43. Since the cutting cylinder 43 is installed on the left side of the vertical frame plate 51, there is enough space on the left side, which is convenient for operations such as disassembly, installation and maintenance. The piston rod of the cutting cylinder 43 is connected to the lower cutting action part 44. The upper cutting action part 44 is installed on the frame 41 of the cutting mechanism 45 and is fixed relative to the frame 41 of the cutting mechanism 45. The piston rod of the cutting cylinder 43 drives the lower cutting action part 44 to cut the material upward.

[0044] As Figure 5 shown, the pulling mechanism 46 includes a pulling clamp 461 and a pulling translation driving device 462 for controlling the left-right translation of the pulling clamp 461. The pulling clamp 461 is controlled by a pulling cylinder 463 to perform the opening and closing action. The pulling clamp 461 has a sheet-like structure extending left and right. The pulling translation driving device 462 can adopt the structural form of a motor, a transmission wheel and a synchronous belt.

[0045] As Figures 6 to 9 shown, the sewing platform 3 is in a long strip shape extending front and back. A sewing area 4 and a feeding area 5 are arranged on the sewing platform 3. A moving mechanism 6 is arranged in the upper area corresponding to the sewing platform 3 on the frame 1. The moving mechanism 6 includes a feeding unit and a translation driving unit for driving the feeding unit to move back and forth between the feeding area 5 and the sewing area 4. In this embodiment, the sewing area 4 is in front of the feeding area 5, and the translation driving unit drives the feeding unit to move back and forth. By cleverly arranging the moving mechanism 6 in the upper area corresponding to the sewing platform 3 on the frame 1, the space below the sewing platform 3 is reserved, which is convenient for the setting of other functional parts of the rubber band connecting machine, such as the flipping mechanism 30, and the connection of different process links. At the same time, the upper placement of the moving mechanism 6 is also convenient for installation, inspection and maintenance. The flipping mechanism 30 clamps the two ends of the rubber band with a set length and then flips it upward so that the long strip-shaped rubber band forms a loop with the two ends overlapping. The flipping mechanism 30 can be a conventional structure.

[0046] The feeding unit includes a feeding upper clamp 7, a feeding lower clamp 8 and a lifting drive device. For example, the lifting drive device is a lifting air cylinder 9. The feeding upper clamp 7 and the feeding lower clamp 8 are arranged corresponding to each other vertically. The lifting drive device can selectively drive the feeding upper clamp 7 to move downward close to the feeding lower clamp 8 or move upward away from the feeding lower clamp 8. The feeding upper clamp 7 has two pressing arms 10 arranged at a left-right interval. The feeding lower clamp 8 has two pushing arms 11 arranged at a left-right interval. The pressing arms 10 and the corresponding pushing arms 11 are arranged corresponding to each other vertically. The front end of the pushing arm 11 extends with a pre-pushing part 12 that extends beyond the front end of the pressing arm 10. In this way, when the feeding unit sends the rubber band to the rear side near the sewing area 4, first, the pre-pushing part 12 pushes the sewn rubber band forward. In this way, during the process of the feeding unit sending the rubber band from the rear side near the sewing area 4 to the sewing area 4, the discharging action of the previous sewn rubber band is completed at the same time.

[0047] The translation drive unit includes a first motor 13, a transmission wheel 14 and a synchronous belt 15. The first motor 13 drives the synchronous belt 15 to move through the transmission wheel 14. The lifting drive device is installed on a translation seat 16. The translation seat 16 is connected to the synchronous belt 15 to move along with the synchronous belt 15. Usually, a first slider 17 is arranged on the translation seat 16. The first slider 17 moves along a first slide rail 18. The first slide rail 18 extends in the front-rear direction. Therefore, by using the guiding and positioning of the first slider 17 and the first slide rail 18, it is beneficial to improve the smoothness and accuracy of the translation seat 16 when it moves horizontally in the front-rear direction under the action of the translation drive unit.

[0048] Above the sewing platform 3 on the frame 1, a material pressing mechanism is provided. The material pressing mechanism includes an upper pressing frame 19, a lower pressing frame 20, and a pressing frame cylinder 21 for controlling the up and down movement of the upper pressing frame 19. The pressing frame cylinder 21 is installed on the cylinder seat 22. The telescopic rod extending forward on the pressing frame cylinder 21 drives the hinge block. The front and back movement of the telescopic rod causes the hinge block to rotate up and down by a certain angle, so that the front end of the hinge block drives the upper pressing frame 19 to move up and down. The upper pressing frame 19 and the lower pressing frame 20 are arranged correspondingly; the two material pushing arms 11 are respectively located on the left and right sides of the lower pressing frame 20. Similarly, the two material pressing arms 10 are also respectively located on the left and right sides of the upper pressing frame 19. In this way, it is convenient for the up and down movement of the upper pressing frame 19 and the material pressing arms 10, and the front and back translation movement of the material pressing arms 10 and the material pushing arms 11. The material pressing mechanism is also connected with a left and right driving device, and the left and right driving device drives the material pressing mechanism to move left and right. The specific structural form of the left and right driving device can be not limited. For example, it adopts the cooperation form of a second motor 23, a gear 24, and a rack 25. The second motor 23 can extend upward into the sewing head 2 and utilize the internal space of the sewing head 2. When the second motor 23 rotates, the rack 25 moves left and right. In this way, the material pressing mechanism connected to the rack 25 through the adapter seat 26 will also move left and right with the rack, so as to realize the left and right position adjustment of the material pressing mechanism. Preferably, a second slide rail 27 extending left and right is provided above the rear end of the sewing platform 3. At the same time, a second slider 28 that can slide left and right along the second slide rail 27 is adapted to the front side of the second slide rail 27. A connection position is reserved on the front side of the second slider 28, and the rear end of the cylinder seat 22 of the material pressing mechanism is detachably connected to the connection position to improve the accuracy of the left and right movement.

[0049] In this embodiment, the material pressing mechanism and the moving mechanism 6 are arranged on the mounting shell 29 to form an integrated module, and the mounting shell 29 is mounted on the left side or the right side of the sewing head 2. In this way, the installation is very convenient, and the integrated module can be installed on the left side or the right side of the sewing head 2. The limitation on the structure of the original sewing head 2 is small, and basically no special design is required for the sewing head 2. Therefore, it is beneficial to the mass production of the sewing head 2 and even the whole sewing machine main body part, and the versatility is good.

[0050] Refer to Figures 1 to 3 , and Figure 10As shown, the flipping mechanism 30 includes two sets of automatic clamping units arranged left and right and a rotation driving unit for controlling the automatic clamping units to flip around corresponding rotation axes. The automatic clamping unit includes a clamping cylinder 31 and a pair of clamping heads 32 driven by the clamping cylinder 31 to open and close. Using the clamping cylinder 31 to drive the clamping heads 32 to open and close is a mature technology, and thus, its working principle will not be elaborated here. The clamping head 32 can be a long strip-shaped plate, which extends in the front-rear direction and is strip-shaped. Therefore, it can satisfy the clamping of both ends of strip-shaped materials or belt-shaped materials extending left and right, such as cloth strips, rubber bands, etc. The clamping head 32 is detachably installed on the clamping cylinder 31, which is convenient for installing or replacing the clamping head suitable for the currently required clamped material as needed. The clamping head 32 is not limited to the above structure, and its structure only needs to be able to complete the clamping or loosening action of the rubber band.

[0051] The rotation driving unit includes two gears 33 arranged at a left-right distance and two sets of rack lifting components. Each of the two gears 33 drives a rotation driving unit. The rack lifting component includes a vertical rack 34 and a lifting cylinder 35 for driving the vertical rack 34 to move up and down. The vertical racks 34 of the two sets of rack lifting components are respectively engaged with a gear 33, and the cooperation between the rack and the gear 33 has good controllability. The lifting cylinder 35 is located below the vertical rack 34. The two sets of rack lifting components are arranged on the left and right outer sides of the two gears 33. The front end of the gear 33 is coaxially connected with a swing arm 36, and the swing arm 36 is eccentrically connected to the automatic clamping unit, and the swing arm 36 is eccentrically connected to the clamping cylinder 31. The swing arm 36 has a circular shaft connection part 361 and a first arm body part 362 tangentially connected to the circular shaft connection part 361. At the end of the first arm body part 362 far from the circular shaft connection part 361, there is a second arm body part 363 extending horizontally, and the clamping cylinder 31 is installed at the lower end of the second arm body part 363. In the initial state, the first arm body parts 362 of the two swing arms 36 are both located inside the circular shaft connection part 361, and the second arm body parts 363 of the two swing arms 36 extend towards each other, with better structural compactness.

[0052] The two gears 33 are installed on a vertical plate 37, and the vertical rack 34 is arranged to be movable up and down along the vertical plate 37. Preferably, guide bars are provided on the left and right sides of the vertical plate 37. A rack mounting seat 38 is connected to the outer end of the vertical rack 34, and a sliding groove is provided on the rack mounting seat. The sliding groove cooperates with the guide bars to form a positioning in which the two rack lifting components hold each other on the left and right sides of the vertical plate 37. Its force is balanced, which is beneficial to stable and smooth movement. At the same time, the structure is very compact. The cross-section of the rack mounting seat 38 is L-shaped, and the vertical rack 34 is detachably installed at the inner end of the rack mounting seat, which is convenient for overhauling and replacing the vertical rack 34.

[0053] Considering the installation and positioning reliability of the lifting cylinder 35, both the top and the rear side of the lifting cylinder 35 are installed and positioned, that is: the top of the lifting cylinder 35 is locked to the front side of the vertical plate 37 through the L-shaped bracket 372. At the same time, an extension plate 375 is installed at a slightly lower position on the front side of the vertical plate 37. The lower end of the extension plate 375 is located below the horizontal plate part of the L-shaped bracket 372 and behind the vertical plate part of the L-shaped bracket 372. In this way, a reserved space is provided to install and position the lifting cylinder 35. The top of the lifting cylinder 35 is screwed and fixed below the horizontal plate part of the L-shaped bracket 372, and the rear side of the lifting cylinder 35 is screwed and fixed to the front side of the extension plate 375, so that the lifting cylinder 35 is set to sink compared with the base plate 372, which is beneficial to the stability during the forward and backward displacement of the entire clamping and rotating mechanism and is not prone to shaking.

[0054] The design focus of the present invention is that mainly by setting the waiting material area 5, the flipping mechanism only needs to load materials to the waiting material area 5, and the feeding mechanism is used to send the materials in the waiting material area 5 to the sewing area 4, saving the waiting and idle time in the sewing area 4 and effectively improving the efficiency.

[0055] The above is only a preferred embodiment of the present invention, and does not impose any limitation on the technical scope of the present invention. Therefore, any minor modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A fully automatic method for sewing and attaching elastic bands, characterized in that: A sewing area and a material waiting area are arranged at the front and rear intervals on the sewing platform; a material cutting mechanism and a material pulling mechanism are respectively arranged on the left and right sides of the sewing platform, and the material cutting mechanism and the material pulling mechanism are arranged corresponding to the left and right sides of the material waiting area; a flipping mechanism is arranged below the sewing platform; a material feeding mechanism, a material pressing mechanism and a sewing machine head are arranged above the sewing platform; The fully automatic method for sewing and attaching elastic bands includes the following steps: Step 1: One end of the elastic band is pulled by the material pulling mechanism to a set length, and two pairs of clips of the flipping mechanism are respectively clamped on the elastic band in the area between the material pulling mechanism and the material cutting mechanism. Subsequently, the material cutting mechanism cuts off the other end of the elastic band; Step 2: The flipping mechanism clamps the cut elastic band strip and flips it upwards relatively, so that the two ends of the elastic band strip are close to or overlap and lap to form an unstitched elastic band loop. The unstitched elastic band loop is arranged around the sewing platform and is located in the material waiting area, and the material feeding mechanism presses the unstitched elastic band loop. Subsequently, the clips of the flipping mechanism open and reset downwards; Step 3: The material feeding mechanism presses the unstitched elastic band loop and pushes it forward to the sewing area, and the material pressing mechanism positions the unstitched elastic band loop in the sewing area. Subsequently, the material feeding mechanism releases the pressing effect on the unstitched elastic band loop and resets backwards; Step 4: The unstitched elastic band loop is sewn and fixed at the overlapping part of the two ends by the sewing machine head in the sewing area to obtain a sewn elastic band loop.

2. The fully automatic method for sewing and attaching elastic bands according to claim 1, characterized in that: In step 3, during the process of the material feeding mechanism feeding the elastic band from the rear side near the sewing area to the sewing area, the pre-pushing part at the front end of the material feeding mechanism pushes the previous sewn elastic band loop forward, and the discharging action of the previous sewn elastic band loop is completed while feeding the material.

3. The fully automatic method for sewing and attaching elastic bands according to claim 2, characterized in that: An elastic band loop collection bin is arranged in front of the sewing platform. In step 3, the pre-pushing part at the front end of the material feeding mechanism pushes the previous sewn elastic band loop from the sewing area and drops it into the elastic band loop collection bin.

4. The fully automatic method for sewing and attaching elastic bands according to claim 1, characterized in that: During cyclic operation, the action of step 1 and the material feeding action of step 3 are carried out simultaneously, the reset action of the material feeding mechanism in step 3 and the upward relative flipping action of the flipping mechanism in step 2 are carried out simultaneously, and the sewing action in step 4 and the material feeding and reset actions of the material feeding mechanism in step 3 are carried out simultaneously.

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