A mattress processing edge device and method thereof

Abstract

The present invention relates to the field of mattress processing technology, and more specifically, to a mattress processing edge device and method thereof, comprising a guide seat, a base, a plurality of supporting legs, a processing table and a plurality of material transport rollers, wherein the processing table is movably arranged on the base, a plurality of the supporting legs are arranged around the base, the guide seat is arranged on the plurality of supporting legs, a guide rail No. 1 is formed on the side surface of the processing table, a plurality of the material transport rollers are symmetrically and movably arranged on the processing table, the base and the supporting legs are connected by a connecting frame, the edge device also includes an edge sewing assembly, the edge sewing assembly is movably arranged on the guide seat and slidably cooperates with the guide rail No. 1 and the guide rail No. 2; the device has a high degree of automation, and the entire single-side sewing processing work is completely completed independently by the device, without the need for staff assistance, thereby reducing the input of labor and also improving the processing speed of the mattress.

Description

Technical Field

[0001] The invention relates to the technical field of mattress processing, and more specifically to an edge surrounding device and a method for processing a mattress. Background Art

[0002] One of the processes in mattress production is to sew the fabrics on both sides of the mattress and the fabrics around the mattress together with a long and narrow cloth strip. This process is called hemming. The use of hemming machines is becoming more and more widespread, improving production efficiency.

[0003] The working method of the existing edge-cutting machine is that the sewing head used for sewing the fabrics on both sides rotates around a fixed workbench on which the mattress is placed to sew. During this process, a staff member is usually arranged to press and pinch the seams of the mattress on the moving path of the sewing head while the edge-cutting machine is processing the edge of the mattress to increase the tightness of the produced mattress. During this process, the staff member's arms will feel very tired. After working for a long time, the staff member's work efficiency will be reduced, which will also affect the quality of the final mattress. Summary of the invention

[0004] The object of the present invention is to provide a mattress edge device for processing to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A mattress processing edge device, comprising a guide seat, a base, a plurality of supporting legs, a processing table and a plurality of material conveying rollers, wherein the processing table is movably arranged on the base, a plurality of the supporting legs are arranged around the base, the guide seat is arranged on a plurality of supporting legs, a No. 2 guide rail is formed on the guide seat, a No. 1 guide rail is formed on the side surface of the processing table, a plurality of the material conveying rollers are symmetrically and movably arranged on the processing table, the base and the supporting legs are connected by a connecting frame, and magnetic blocks that repel each other are arranged on the opposite surfaces of the connecting frame and the processing table, the edge device also includes an edge sewing assembly, the edge sewing assembly is movably arranged on the guide seat and slidably cooperates with the No. 1 guide rail and the No. 2 guide rail, and the edge sewing assembly is used for edge processing of the mattress;

[0007] The edge sewing assembly includes a moving structure, an auxiliary pressing structure and a sewing execution structure. The moving structure is movably arranged on a guide seat. The sewing execution structure is arranged on the moving structure and is used to perform edge sewing of the mattress. The auxiliary pressing structure is arranged on the moving structure and is used to simulate manual pressing of the mattress seams to complete the fabric connection.

[0008] A further technical solution of the present application is as follows: the movable structure includes a movable seat, a movable wheel, a sliding column, a stepper motor and a rotating arm, the sliding column is movably arranged in the No. 2 guide rail, the movable seat is arranged on the sliding column, the movable wheel is movably arranged on the movable seat, the stepper motor is arranged on the base, the output end of the stepper motor is movably connected to the processing table through a telescopic shaft, one end of the rotating arm is connected to the telescopic shaft, and the other end is movably sleeved on the sliding column, the stepper motor is movably connected to the processing table through a telescopic cylinder, the rotating arm slides through the telescopic cylinder, and the sliding column and the No. 1 guide rail are slidably matched.

[0009] A further technical solution of the present application is as follows: a resistance reducing member is provided between the slide column and the second guide rail, so as to reduce the friction resistance between the slide column and the first guide rail.

[0010] A further technical solution of the present application is as follows: the telescopic cylinder comprises an outer cylinder and an inner cylinder, the inner cylinder is movably arranged on a stepper motor, the outer cylinder is movably arranged on a processing table, the outer cylinder is movably sleeved on the outer wall of the inner cylinder, and an infrared ranging sensor is arranged on the stepper motor and is arranged on one side of the processing table.

[0011] The present application has a further technical solution: the sewing execution structure includes a control box, a power box, a winding disk, a guide disk and a sewing machine, the control box and the power box are both arranged on a movable seat, the sewing machine is arranged on the movable seat and is located on one side of the processing table, the winding disk and the guide disk are both movably arranged on the movable seat, and a sideband guide seat is arranged on the movable seat on one side of the guide disk.

[0012] The present application has a further technical solution: the auxiliary pressing structure includes a pressing seat, a group of pressing heads and an inflation unit, the pressing seat is arranged on a movable seat, a group of pressing heads are symmetrically and movably arranged in the pressing seat, a group of pressing heads are elastically connected to each other, a mounting seat is arranged on the movable seat, the inflation unit is arranged on the mounting seat and connected to the pressing seat, the inflation unit is connected to a winding reel, and when the winding reel moves, the inflation unit is controlled to work and input air into the pressing seat.

[0013] The present application has a further technical solution: the inflation unit includes a positioning guide rail, a hollow tube, a piston rod and a top arm, the positioning guide rail is arranged on the winding reel, a moving block is movably arranged in the positioning guide rail, the hollow tube is arranged on the mounting seat, the hollow tube is connected to the pressing seat through a hose, the piston rod is movably arranged in the hollow tube and the two are elastically connected, and the piston rod is movably connected to the moving block through the top arm.

[0014] A further technical solution of the present application is as follows: the edge device also includes a flipping structure, which is arranged on a processing table to assist the mattress to flip on the processing table.

[0015] A further technical solution of the present application is as follows: the flipping structure includes a push plate, a sliding seat, a linear motor and a driving arm, the push plate is at least one and one end of the push plate is movably connected to the processing table, the sliding seat is movably arranged on the processing table and is movably connected to the other end of the push plate through the driving arm, and the linear motor is arranged on the processing table and its movable end is connected to the sliding seat.

[0016] A mattress edge-binding method includes the edge-binding device described in the above technical solution. The specific steps of the edge-binding method are as follows:

[0017] S100: placing the mattress on the processing table by controlling the rotation of the conveying roller, and using the rotation of the conveying roller to transport the mattress to the surface of the processing table;

[0018] S200: driving the sewing execution structure to move around the processing table and the mattress by controlling the movement of the moving structure, and performing the edge sewing operation on the mattress by controlling the sewing execution structure to work;

[0019] S300: while the sewing execution structure is working, the auxiliary pressing structure can be controlled to work synchronously, and the auxiliary pressing structure can simulate manual pressing and connecting processing on the edge of the mattress to be sewn.

[0020] Compared with the prior art, the technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0021] The embodiment of the present invention sets a moving structure, an auxiliary pressing structure and a sewing execution structure, and utilizes a mechanical linkage structure. When the sewing execution structure is controlled to work, when the winding disk rotates due to the discharge of the edge banding, the auxiliary pressing structure is driven to work. The auxiliary pressing structure can control the two pressing heads to reciprocate in the pressing seat, thereby imitating the manual transmission method of pressing and pinching the seams of the mattress. The device has a high degree of automation, and the entire single-sided sewing processing work is completely completed by the device independently, without the need for staff assistance, reducing the labor input, and also improving the processing speed of the mattress. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a mattress edge processing device according to an embodiment of the present invention;

[0023] Figure 2 An exploded view of a guide seat and a processing table of a mattress processing edge device in an embodiment of the present invention;

[0024] Figure 3 A half-section view of a processing table in the structure of the mattress processing edge device in an embodiment of the present invention;

[0025] Figure 4A half-section view of a telescopic cylinder in a mattress edge processing device according to an embodiment of the present invention;

[0026] Figure 5 It is a schematic structural diagram of a surrounding edge sewing assembly in a surrounding edge device for mattress processing according to an embodiment of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the auxiliary pressing structure in the edge surrounding device for mattress processing according to an embodiment of the present invention;

[0028] Figure 7 A half-section view of a pressing seat and a pressing head in a mattress edge processing device according to an embodiment of the present invention;

[0029] Figure 8 It is a schematic diagram of the partial structure of the inflation unit in the mattress edge device in the embodiment of the present invention.

[0030] Explanation of the symbols in the schematic diagram:

[0031] 1-guide seat, 2-support foot, 3-processing table, 4-guide rail No. 1, 5-guide rail No. 2, 6-base, 7-control box, 8-stepping motor, 9-transport roller, 10-push plate, 11-rotating arm, 12-magnetic block, 13-linear motor, 14-sliding seat, 15-driving arm, 16-telescopic shaft, 17-outer cylinder, 18-inner cylinder, 19-infrared ranging sensor, 20-moving seat, 21-moving wheel, 22-sliding column, 23-roller, 24-power box, 25-sewing machine, 26-winding disk, 27-edge band guide seat, 28-hollow tube, 29-mounting seat, 30-pressing seat, 31-pressing head, 32-top arm, 33-adjusting guide rail, 34-hose, 35-piston rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention is further described below in combination with the embodiments.

[0033] See also Figure 1-Figure 8In one embodiment of the present application, a mattress processing edge device includes a guide seat 1, a base 6, a plurality of support legs 2, a processing table 3 and a plurality of conveying rollers 9, wherein the processing table 3 is movably arranged on the base 6, and a plurality of the support legs 2 are arranged around the base 6, the guide seat 1 is arranged on a plurality of the support legs 2, a No. 2 guide rail 5 is formed on the guide seat 1, a No. 1 guide rail 4 is formed on the side of the processing table 3, and a plurality of the conveying rollers 9 are symmetrically and movably arranged on the processing table 3, the base 6 and the support legs 2 are connected by a connecting frame, and the opposite surfaces of the connecting frame and the processing table 3 are provided with magnetic blocks 12 that repel each other, and the edge device also includes an edge sewing assembly, which is movably arranged on the guide seat 1 and slidably cooperates with the No. 1 guide rail 4 and the No. 2 guide rail 5, and the edge sewing assembly is used for edge processing of the mattress;

[0034] The edge sewing assembly includes a moving structure, an auxiliary pressing structure and a sewing execution structure. The moving structure is movably arranged on the guide seat 1. The sewing execution structure is arranged on the moving structure to perform the edge sewing work of the mattress. The auxiliary pressing structure is arranged on the moving structure to simulate manual pressing of the mattress seams to complete the fabric connection.

[0035] In a specific case of the present embodiment, the movable structure includes a movable seat 20, a movable wheel 21, a sliding column 22, a stepper motor 8 and a rotating arm 11, the sliding column 22 is movably arranged in the second guide rail 5, the movable seat 20 is arranged on the sliding column 22, the movable wheel 21 is movably arranged on the movable seat 20, the stepper motor 8 is arranged on the base 6, the output end of the stepper motor 8 is movably connected to the processing table 3 through the telescopic shaft 16, one end of the rotating arm 11 is connected to the telescopic shaft 16, and the other end is movably sleeved on the sliding column 22, the stepper motor 8 is movably connected to the processing table 3 through the telescopic cylinder, the rotating arm 11 slides through the telescopic cylinder, and the sliding column 22 is slidably matched with the first guide rail 4.

[0036] It should be supplemented that a resistance reducing member is provided between the slide column 22 and the second guide rail 5 to reduce the friction resistance between the slide column 22 and the first guide rail 4 .

[0037] It should be particularly noted that the resistance reducing member may be a ball or a roller 23 . In this embodiment, the resistance reducing member is preferably a roller 23 , which is movably disposed on the slide column 22 , and the roller 23 and the first guide rail 4 are slidably matched.

[0038] In another specific case of this embodiment, the telescopic cylinder includes an outer cylinder 17 and an inner cylinder 18, the inner cylinder 18 is movably set on the stepper motor 8, the outer cylinder 17 is movably set on the processing table 3, the outer cylinder 17 is movably sleeved on the outer wall of the inner cylinder 18, and the stepper motor 8 is provided with an infrared ranging sensor 19 and it is arranged on one side of the processing table 3.

[0039] In actual application, the mattress is placed on the processing table 3 by controlling the rotation of the material transport roller 9. The mattress can be transported and completely moved to the surface of the processing table 3 by rotating the material transport roller 9. Under the action of the gravity of the mattress, the processing table 3 can be moved downward relative to the stepper motor 8 and the base 6, and the outer cylinder 17 can be driven to move downward relative to the inner cylinder 18. When the infrared ranging sensor 19 detects that the displacement of the processing table 3 reaches the expected value, the stepper motor 8 is controlled to be powered on and rotated, driving the rotating arm 11 to rotate, and then driving the moving seat 20 to move along the No. 1 guide rail 4 and the No. 2 guide rail 5, adjusting the position of the suture execution structure and the auxiliary pressing structure, and controlling the suture execution structure to suture the edge of the mattress; while the suture execution structure is working, the auxiliary pressing structure can be controlled to work synchronously, and the auxiliary pressing structure can imitate manual pressing and connecting processing on the edge to be sutured of the mattress.

[0040] See also Figure 1-Figure 8 As another preferred embodiment of the present application, the stitching execution structure includes a control box 7, a power box 24, a winding disk 26, a guide disk and a stitching machine 25. The control box 7 and the power box 24 are both arranged on a movable seat 20. The stitching machine 25 is arranged on the movable seat 20 and is located on one side of the processing table 3. The winding disk 26 and the guide disk are both movably arranged on the movable seat 20. A sideband guide seat 27 is arranged on the movable seat 20 on one side of the guide disk.

[0041] In a specific case of the present embodiment, the auxiliary pressing structure includes a pressing seat 30, a group of pressing heads 31 and an inflation unit, the pressing seat 30 is arranged on the movable seat 20, a group of the pressing heads 31 are symmetrically and movably arranged in the pressing seat 30, a group of the pressing heads 31 are elastically connected to each other, a mounting seat 29 is arranged on the movable seat 20, the inflation unit is arranged on the mounting seat 29 and is connected to the pressing seat 30, the inflation unit is connected to the winding reel 26, and when the winding reel 26 moves, it controls the inflation unit to work and input air into the pressing seat 30.

[0042] In another specific case of this embodiment, the inflation unit includes a positioning guide rail 33, a hollow tube 28, a piston rod 35 and a top arm 32. The positioning guide rail 33 is set on the winding disk 26, and a moving block is movably set in the positioning guide rail 33. The hollow tube 28 is set on the mounting seat 29. The hollow tube 28 is connected to the pressing seat 30 through a hose 34. The piston rod 35 is movably set in the hollow tube 28 and the two are elastically connected. The piston rod 35 is movably connected to the moving block through the top arm 32.

[0043] It should be specially noted that the inflation unit described in this embodiment is not limited to the above-mentioned mechanical structure, and may also be replaced by a fan or an air pump, as long as it can inflate the pressing seat 30, which will not be listed one by one here.

[0044] In actual application, the edge band of the mattress is rolled up on the winding disk 26, the free end of the edge band is passed through the guide disk and the edge band guide seat 27, and then the edge band is attached to the position to be processed of the mattress. In the process of controlling the movable seat 20 to move along the No. 1 guide rail 4 and the No. 2 guide rail 5, the power box 24 and the sewing machine 25 can be controlled to work, and the sewing machine 25 can sew the edge band to the edge fabric of the mattress. In this process, the winding disk 26 can be driven to rotate, and when the winding disk 26 rotates, the positioning guide rail 33 can be driven to rotate synchronously. Under the cooperation between the positioning guide rail 33 and the moving block, the moving block can be driven to reciprocate relative to the winding disk 26, and then under the action of the top arm 32, the piston rod 35 is controlled to reciprocate along the hollow tube 28, and then the air in the hollow tube 28 is repeatedly squeezed into the pressing seat 30, driving the pressing head 31 to reciprocate in the pressing seat 30, which can realize the imitation work of manually pressing the seams of the mattress and reduce the input of labor.

[0045] See also Figure 1-Figure 8 As another preferred embodiment of the present application, the edge device also includes a flipping structure, which is arranged on the processing table 3 and is used to assist the mattress to flip on the processing table 3.

[0046] In this exemplary embodiment, the flipping structure includes a push plate 10, a sliding seat 14, a linear motor 13 and a driving arm 15. The number of the push plate 10 is at least one and one end is movably connected to the processing table 3. The sliding seat 14 is movably arranged on the processing table 3 and is movably connected to the other end of the push plate 10 through the driving arm 15. The linear motor 13 is arranged on the processing table 3 and its movable end is connected to the sliding seat 14.

[0047] This embodiment is exemplary, and this embodiment is not limited to the above-mentioned linear motor 13 to control the position of the sliding seat 14 on the processing table 3, and an electric telescopic rod or a cylinder can also be used instead, which are not listed here one by one.

[0048] After completing the edge wrapping work on one side of the mattress, the linear motor 13 is controlled to be energized and extended, thereby driving the sliding seat 14 to move. Under the action of the driving arm 15, the push plate 10 can be driven to rotate along its hinge, driving the mattress to rotate synchronously, and the mattress can be flipped over manually by the staff and with the assistance of the transport roller 9, so that the other side of the mattress can be processed by edge wrapping.

[0049] See also Figure 1-Figure 8 In another embodiment of the present application, a mattress edge processing method includes the edge device described in the above technical solution, and the specific steps of the edge processing method are as follows:

[0050] S100: placing the mattress on the processing table 3 by controlling the conveying roller 9 to rotate, and the conveying roller 9 can be used to rotate to transport the mattress to the surface of the processing table 3;

[0051] S200: By controlling the movement structure to work, the sewing execution structure is driven to move around the processing table 3 and the mattress, and the mattress is sewn around the edge by controlling the sewing execution structure to work;

[0052] S300: while the sewing execution structure is working, the auxiliary pressing structure can be controlled to work synchronously, and the auxiliary pressing structure can simulate manual pressing and connecting processing on the edge of the mattress to be sewn.

[0053] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

[0054] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A mattress processing edge device, comprising a guide seat (1), a base (6), a plurality of supporting legs (2), a processing table (3) and a plurality of material transport rollers (9), wherein the processing table (3) is movably arranged on the base (6), a plurality of the supporting legs (2) are arranged around the base (6), the guide seat (1) is arranged on the plurality of supporting legs (2), a second guide rail (5) is formed on the guide seat (1), a first guide rail (4) is formed on the side surface of the processing table (3), and a plurality of the material transport rollers (9) are symmetrically and movably arranged on the processing table (3), characterized in that: The base (6) and the supporting foot (2) are connected via a connecting frame, and opposing surfaces of the connecting frame and the processing table (3) are provided with magnetic blocks (12) that repel each other when they meet. The edge surrounding device also includes an edge surrounding stitching assembly, which is movably arranged on the guide seat (1) and is slidably matched with the first guide rail (4) and the second guide rail (5). The edge surrounding stitching assembly is used for performing edge surrounding processing on the mattress; The edge sewing assembly comprises a moving structure, an auxiliary pressing structure and a sewing execution structure, wherein the moving structure is movably arranged on a guide seat (1), the sewing execution structure is arranged on the moving structure and is used to perform the edge sewing work of the mattress, and the auxiliary pressing structure is arranged on the moving structure and is used to simulate manual pressing of the mattress sewing position to complete the fabric connection; The movable structure comprises a movable seat (20), a movable wheel (21), a sliding column (22), a stepping motor (8) and a rotating arm (11); the sliding column (22) is movably arranged in the second guide rail (5); the movable seat (20) is arranged on the sliding column (22); the movable wheel (21) is movably arranged on the movable seat (20); the stepping motor (8) is arranged on the base (6); the output end of the stepping motor (8) is movably connected to the processing table (3) through a telescopic shaft (16); one end of the rotating arm (11) is connected to the telescopic shaft (16); the other end is movably sleeved on the sliding column (22); the stepping motor (8) is movably connected to the processing table (3) through a telescopic cylinder; the rotating arm (11) slides through the telescopic cylinder; the sliding column (22) and the first guide rail (4) are slidably matched; The auxiliary pressing structure comprises a pressing seat (30), a group of pressing heads (31) and an air charging unit, wherein the pressing seat (30) is arranged on the movable seat (20), a group of the pressing heads (31) are symmetrically and movably arranged in the pressing seat (30), and the group of the pressing heads (31) are elastically connected to each other, a mounting seat (29) is arranged on the movable seat (20), the air charging unit is arranged on the mounting seat (29) and is connected to the pressing seat (30), and the air charging unit is connected to the winding reel (26), and when the winding reel (26) moves, the air charging unit is controlled to work and input air into the pressing seat (30).

2. The mattress edge processing device according to claim 1, characterized in that: A resistance reducing member is provided between the slide column (22) and the second guide rail (5) to reduce the friction resistance between the slide column (22) and the first guide rail (4).

3. The mattress edge processing device according to claim 2, characterized in that: The telescopic cylinder comprises an outer cylinder (17) and an inner cylinder (18); the inner cylinder (18) is movably mounted on a stepper motor (8); the outer cylinder (17) is movably mounted on a processing table (3); the outer cylinder (17) is movably sleeved on an outer wall of the inner cylinder (18); and an infrared distance measuring sensor (19) is mounted on the stepper motor (8) and is disposed on one side of the processing table (3).

4. The mattress edge processing device according to claim 3, characterized in that: The stitching execution structure comprises a control box (7), a power box (24), a reel (26), a guide disk and a stitching machine (25); the control box (7) and the power box (24) are both arranged on a movable seat (20); the stitching machine (25) is arranged on the movable seat (20) and is located on one side of the processing table (3); the reel (26) and the guide disk are both movably arranged on the movable seat (20); and a sideband guide seat (27) is arranged on the movable seat (20) and is located on one side of the guide disk.

5. The mattress edge processing device according to claim 4, characterized in that: The inflation unit comprises a positioning guide rail (33), a hollow tube (28), a piston rod (35) and a top arm (32); the positioning guide rail (33) is arranged on a winding reel (26); a moving block is movably arranged in the positioning guide rail (33); the hollow tube (28) is arranged on a mounting seat (29); the hollow tube (28) is connected to a pressing seat (30) via a hose (34); the piston rod (35) is movably arranged in the hollow tube (28) and the two are elastically connected; the piston rod (35) is movably connected to the moving block via the top arm (32).

6. The mattress edge device according to claim 5, characterized in that: The edge surrounding device further comprises a turning structure, which is arranged on the processing table (3) and is used to assist the mattress in turning over on the processing table (3).

7. The mattress edge processing device according to claim 6, characterized in that: The flip structure comprises a push plate (10), a sliding seat (14), a linear motor (13) and a driving arm (15); the push plate (10) is at least one in number and one end of the push plate (10) is movably connected to the processing table (3); the sliding seat (14) is movably arranged on the processing table (3) and is movably connected to the other end of the push plate (10) via the driving arm (15); and the linear motor (13) is arranged on the processing table (3) and its movable end is connected to the sliding seat (14).

8. A mattress edge processing method, comprising the edge device according to claim 7, characterized in that: The specific steps of the edge surrounding method are as follows: S100: placing the mattress on the processing table (3) by controlling the material transport roller (9) to rotate, and transporting the mattress to move it completely to the surface of the processing table (3) by rotating the material transport roller (9); S200: by controlling the movement structure to work, the sewing execution structure is driven to move around the processing table (3) and the mattress, and the mattress is sewn around the edge by controlling the sewing execution structure to work; S300: while the sewing execution structure is working, the auxiliary pressing structure can be controlled to work synchronously, and the auxiliary pressing structure can simulate manual pressing and connecting processing on the edge of the mattress to be sewn.

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