Pocket and flap sewing apparatus for a bag applicator

By integrating a multi-drive assembly consisting of a sliding seat, a pressure plate, and a flap flipping bracket, the pocket and flap sewing processes are handled simultaneously, solving the problems of positional deviation and high cost caused by the separation of flap sewing equipment in existing technologies, and achieving efficient and low-cost sewing results.

CN224531217UActive Publication Date: 2026-07-21ZHEJIANG MAQI SEWING MACHINE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG MAQI SEWING MACHINE
Filing Date
2025-07-29
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing patching machines require a separate flap sewing machine when sewing flaps, which can easily lead to deviations in the position of the flap and the pocket, as well as in the stitching trajectory, increasing equipment investment and maintenance costs.

Method used

Design a pocket and flap sewing device for a patching machine, integrating a sliding seat, a pressure plate, a flap pressing bracket, and a flap flipping bracket. Through multiple drive components, synchronous operation of pocket and flap sewing is achieved, ensuring positional consistency and accurate stitch trajectory.

Benefits of technology

It enables simultaneous processing of pocket and flap sewing, reduces equipment changeover time, improves product consistency, and lowers equipment procurement and maintenance costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to pocket attaching machine technical field, especially point to a kind of pocket and pocket cover sewing device of pocket attaching machine;Material pressing plate is connected to sliding seat by first drive component, and by first drive component drive movement along up-down direction;The pocket cover turnover support is connected to sliding seat by second drive component, and by second drive component drive moves along up-down and front-back direction, the pocket cover turnover support is located at the rear end of material pressing plate;The pocket cover pressing support is connected to material pressing plate by third drive component, and by third drive component drive moves along up-down and front-back direction;The pocket cover pressing support is located between material pressing plate and pocket cover turnover support when pressing pocket cover, and form the wiring gap between pocket cover pressing support and pocket cover turnover support;The utility model can handle two processes of pocket sewing and pocket cover sewing simultaneously, reduce equipment switching time, ensure that the pocket cover position, thread track of every product are completely consistent, and reduce clothing enterprise equipment procurement cost, maintenance cost etc.
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Description

Technical fields:

[0001] This utility model belongs to the technical field of bag-sealing machines, and specifically refers to a bag-sealing machine for sewing pockets and bag flaps. Background technology:

[0002] The patch pocket machine is mainly used in the sewing of pockets for denim and shirts. It can complete flat stitching and buttonhole stitching in one go. It is suitable for sewing back pockets of various jeans, shirt pockets, and other irregularly shaped parts in garment processing.

[0003] For example, a Chinese invention patent (publication number CN 109594220A, publication date 2019.04.09) discloses a pocket-attaching machine that achieves efficient and precise pocket sewing through the integration of automated folding and sewing. However, this technology has obvious process limitations: when the product needs to have a pocket flap sewn on, it must rely on a separate pocket flap machine for secondary processing. This process separation leads to the following defects: the relative position of the pocket flap and the pocket, and the stitch trajectory are prone to deviation due to equipment switching, affecting product standardization; separate processing requires multiple dedicated machines, increasing equipment investment and maintenance costs. Summary of the Invention:

[0004] The purpose of this invention is to provide a pocket and flap sewing device for a patching machine that can simultaneously handle two processes: pocket sewing and flap sewing, thereby improving product consistency and reducing production costs.

[0005] This utility model is implemented as follows:

[0006] A pocket and flap sewing device for a patching machine includes: a sliding seat, a pressure plate, a flap-pressing bracket, and a flap-flipping bracket. The pressure plate is used to press down the sewing material and is connected to the sliding seat via a first driving assembly, and is driven by the first driving assembly to move in the up-down direction. The flap-flipping bracket is connected to the sliding seat via a second driving assembly and is driven by the second driving assembly to move in the up-down and back-forward directions. The flap-flipping bracket is located at the rear end of the pressure plate. The flap-pressing bracket is connected to the pressure plate via a third driving assembly and is driven by the third driving assembly to move in the up-down and back-forward directions. When pressing the flap, the flap-pressing bracket is located between the pressure plate and the flap-flipping bracket, forming a stitching gap between the flap-pressing bracket and the flap-flipping bracket.

[0007] In the above-mentioned pocket and flap sewing device of a bag patching machine, the first driving component includes a pressure plate cylinder spaced apart on a sliding seat. The pressure plate cylinder has a first piston rod that moves in the vertical direction. A first guide rail is provided in the vertical direction on the sliding seat on one side of the pressure plate cylinder. The pressure plate connecting block is slidably connected to the first guide rail through a first slider. The pressure plate connecting block is connected to the first piston rod through a cylinder connecting block. The pressure plate connecting block is provided with a pressure plate mounting seat for mounting the pressure plate.

[0008] In the above-mentioned pocket and flap sewing device of a patching machine, the second driving component includes a lifting cylinder mounted on a sliding seat. The lifting cylinder has a second piston rod connected to a sliding plate. The sliding plate is slidably mounted on the sliding seat and driven by the lifting cylinder to move in the up-down direction. A flap flipping bracket cylinder is mounted on the outer wall of the sliding plate to drive the flap flipping bracket to move back and forth. The flap flipping bracket cylinder has a third piston rod connected to the flap flipping bracket and drives it to move back and forth.

[0009] In the above-mentioned pocket and flap sewing device of a patching machine, a second guide rail is provided on the sliding seat along the vertical direction, and the slide plate is slidably connected to the second guide rail through a second slider.

[0010] In the above-mentioned pocket and bag flap sewing device of a bag patching machine, a lifting cylinder mounting block is provided on the sliding seat, and a first strip hole for adjusting the vertical position of the lifting cylinder is provided on the lifting cylinder mounting block along the vertical direction.

[0011] In the above-mentioned pocket and flap sewing device of a patching machine, the third driving component includes a forward and backward moving cylinder and a flap pressing cylinder. The forward and backward moving cylinder has a fourth piston rod, which is connected to the flap pressing cylinder through a flap pressing cylinder bracket and drives the flap pressing cylinder to move forward and backward. The flap pressing cylinder has a fifth piston rod, which is connected to the flap pressing bracket and drives the flap pressing bracket to move in the up and down direction.

[0012] In the bag and bag flap sewing device of the above-mentioned bag patching machine, the front and rear moving cylinder is mounted on the pressure plate by a front and rear moving cylinder bracket, and the front and rear moving cylinder bracket has a second strip hole that can adjust the front and rear position of the front and rear moving cylinder.

[0013] In the pocket and flap sewing device of the above-mentioned patching machine, the flap flipping bracket has at least one horizontally arranged thread hole for reinforcing the pocket flap sewing.

[0014] The outstanding advantages of this utility model compared to the prior art are:

[0015] This invention can simultaneously handle both pocket sewing and flap sewing processes, reducing equipment changeover time and ensuring that the flap position and stitching trajectory of each product are completely consistent, meeting high-standard quality inspection requirements. Furthermore, this invention can integrate two machines—a patch attaching machine and a flap attaching machine—directly reducing equipment procurement and maintenance costs for garment companies. Attached image description:

[0016] Figure 1 This is one of the three-dimensional schematic diagrams of this utility model;

[0017] Figure 2 This is the second three-dimensional schematic diagram of this utility model.

[0018] In the diagram: 1. Sliding seat; 2. Pressure plate; 3. Bag cap support; 4. Bag cap flipping support; 5. Wiring gap; 6. Pressure plate cylinder; 7. First guide rail; 8. Pressure plate connecting block; 9. Cylinder connecting block; 10. Pressure plate mounting seat; 11. Lifting cylinder; 12. Slide plate; 13. Bag cap flipping support cylinder; 14. Lifting cylinder mounting block; 15. First strip hole; 16. Forward and backward movement cylinder; 17. Bag cap cylinder; 18. Bag cap cylinder support; 19. Forward and backward movement cylinder support; 20. Second strip hole; 21. Wiring groove. Detailed implementation method:

[0019] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —2:

[0020] This utility model provides a pocket and flap sewing device for a patching machine. The sewing device includes: a sliding seat 1, a pressure plate 2, a flap-pressing bracket 3, and a flap-flipping bracket 4. The sliding seat 1 is connected to a drive mechanism to drive the device to switch between the feeding position and the sewing position. The pressure plate 2 is used to press down the sewing material and is connected to the sliding seat 1 through a first drive assembly, which drives it to move in the up-down direction. The flap-flipping bracket 4 is connected to the sliding seat 1 through a second drive assembly and is driven to move in the up-down and back-forward directions. The flap-flipping bracket 4 is located at the rear end of the pressure plate 2. The flap-pressing bracket 3 is connected to the pressure plate 2 through a third drive assembly and is driven to move in the up-down and back-forward directions. When pressing the flap, the flap-pressing bracket 3 is located between the pressure plate 2 and the flap-flipping bracket 4, forming a stitching gap 5 between them.

[0021] This invention can simultaneously handle both pocket sewing and flap sewing processes, reducing equipment changeover time and ensuring that the flap position and stitching trajectory of each product are completely consistent, meeting high-standard quality inspection requirements. Furthermore, this invention can integrate two machines—a patch attaching machine and a flap attaching machine—directly reducing equipment procurement and maintenance costs for garment companies.

[0022] Furthermore, the first driving assembly includes a pressure plate cylinder 6 spaced apart on the sliding seat 1. The pressure plate cylinder 6 has a first piston rod that moves in the vertical direction. A first guide rail 7 is provided in the vertical direction on the sliding seat 1 on one side of the pressure plate cylinder 6. A pressure plate connecting block 8 is slidably connected to the first guide rail 7 via a first slider. The pressure plate connecting block 8 is connected to the first piston rod via a cylinder connecting block 9. A pressure plate mounting seat 10 for mounting the pressure plate 2 is provided on the pressure plate connecting block 8. The pressure plate mounting seat 10 is L-shaped, which enables the horizontally positioned pressure plate 2 to be connected to the vertical surface of the sliding seat 1.

[0023] Similarly, the second drive assembly includes a lifting cylinder 11 disposed on the sliding seat 1. The lifting cylinder 11 has a second piston rod, which is connected to the slide plate 12. The slide plate 12 is slidably disposed on the sliding seat 1 and is driven by the lifting cylinder 11 to move in the up and down direction. A bag cap flipping bracket cylinder 13 is disposed on the outer side wall of the slide plate 12 to drive the bag cap flipping bracket 4 to move back and forth. The bag cap flipping bracket cylinder 13 has a third piston rod, which is connected to the bag cap flipping bracket 4 and drives it to move back and forth.

[0024] Furthermore, the sliding seat 1 is provided with a second guide rail along the vertical direction, and the slide plate 12 is slidably connected to the second guide rail via a second slider.

[0025] In this embodiment, the sliding seat 1 is provided with a lifting cylinder mounting block 14, and the lifting cylinder mounting block 14 is provided with a first strip hole 15 along the vertical direction for adjusting the vertical position of the lifting cylinder 11.

[0026] In addition, the third drive assembly includes a front-to-back moving cylinder 16 and a bag-pressing cylinder 17. The front-to-back moving cylinder 16 has a fourth piston rod, which is connected to the bag-pressing cylinder 17 via a bag-pressing cylinder bracket 18 and drives the bag-pressing cylinder 17 to move back and forth. The bag-pressing cylinder 17 has a fifth piston rod, which is connected to the bag-pressing bracket 3 and drives the bag-pressing bracket 3 to move in the up-down direction.

[0027] It should be noted that the bag cover support 3 adopts a multi-bend structure, having a top plate connected to the fifth piston rod, a pressure plate that presses down the bag cover, and a connecting plate that connects the top plate and the pressure plate.

[0028] To facilitate adjustment of the front and rear positions of the bag cover bracket 3, the front and rear moving cylinder 16 is mounted on the pressing plate 2 via the front and rear moving cylinder bracket 19. The front and rear moving cylinder bracket 19 has a second strip hole 20 that can adjust the front and rear positions of the front and rear moving cylinder 16.

[0029] This utility model also provides at least one horizontally arranged seam groove 21 for reinforcing the pocket flap sewing on the pocket flap flip bracket 4.

[0030] It should be noted that the pressing plate cylinder 6, lifting cylinder 11, bag cover flipping bracket cylinder 13, forward and backward moving cylinder 16, and bag cover pressing cylinder 27 described in this utility model are all positioning cylinders with guide rods to accurately drive the movement of each corresponding component.

[0031] The working process of this utility model is as follows:

[0032] After the pocket folding process is completed, the pressure plate 2 begins to function, effectively pressing down the fabric to ensure its position remains fixed and prevents displacement during subsequent operations. At this point, manual intervention is required to accurately place the pocket flap under the pressure flap bracket 3. It should be noted that the pocket flap portion is located on the upper surface of the pocket flap flipping bracket 4. The third drive assembly then moves the pressure flap bracket 3 downwards until the pocket flap is firmly pressed down, preparing for subsequent sewing operations.

[0033] After the pressure plate 2 stably presses down the fabric and pocket flap, the drive device moves the sliding seat 1 to the right, gradually reaching the sewing area. At this time, the fabric and pocket flap also move to the sewing area. The sewing machine starts. According to the preset program, the sewing machine first sews the pocket part, completing the basic sewing work of the pocket. Then, it continues to fix the inner splicing part of the pocket flap (through the stitching gap 5 between the pocket flap support 3 and the pocket flap flipping support 4), ensuring the relative structural stability of the pocket and pocket flap.

[0034] After the initial sewing is completed, the second drive component is activated, causing the slide plate 12 to rise and lift. At the same time, the third drive component is activated, driving the bag cover bracket 3 to rise and lift first, and then move forward to a suitable position, so that the bag cover bracket 3 is above the pressure plate 2, making room for the flipping operation of the bag cover.

[0035] After the preparation work for flipping the pocket flap is completed, the second drive assembly continues to operate, driving the pocket flap flipping bracket 4 to move forward. During the movement, it contacts the pocket flap and flips it, positioning the pocket flap in the appropriate sewing position. The second drive assembly then continues to operate, driving the pocket flap flipping bracket 4 to descend and press down on the flipped pocket flap. After the pocket flap is stably pressed down, the sewing machine continues to work, reinforcing the pocket flap with stitching to further enhance the connection strength between the pocket flap and the pocket, ensuring sewing quality.

[0036] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A pocket and flap sewing device for a patching machine, characterized in that: include: The slide seat (1), pressure plate (2), bag cover support (3), and bag cover flipping support (4) are provided. The pressure plate (2) is used to press down the sewing material and is connected to the slide seat (1) through a first drive assembly and is driven by the first drive assembly to move in the up and down direction. The bag cover flipping support (4) is connected to the slide seat (1) through a second drive assembly and is driven by the second drive assembly to move in the up and down and front and back directions. The bag cover flipping support (4) is located at the rear end of the pressure plate (2). The bag cover support (3) is connected to the pressure plate (2) through a third drive assembly and is driven by the third drive assembly to move in the up and down and front and back directions. When pressing the bag cover, the bag cover support (3) is located between the pressure plate (2) and the bag cover flipping support (4) and forms a stitching gap (5) between the bag cover support (3) and the bag cover flipping support (4).

2. The pocket and flap sewing device of a patching machine according to claim 1, characterized in that: The first driving component includes a pressure plate cylinder (6) spaced on a sliding seat (1). The pressure plate cylinder (6) has a first piston rod that moves in the up-down direction. A first guide rail (7) is provided on the sliding seat (1) on one side of the pressure plate cylinder (6) in the up-down direction. A pressure plate connecting block (8) is slidably connected to the first guide rail (7) through a first slider. The pressure plate connecting block (8) is connected to the first piston rod through a cylinder connecting block (9). A pressure plate mounting seat (10) for mounting the pressure plate (2) is provided on the pressure plate connecting block (8).

3. The pocket and flap sewing device of a patching machine according to claim 1, characterized in that: The second drive assembly includes a lifting cylinder (11) mounted on a sliding seat (1). The lifting cylinder (11) has a second piston rod connected to a slide plate (12). The slide plate (12) is slidably mounted on the sliding seat (1) and driven by the lifting cylinder (11) to move in the up and down direction. A bag cover flipping bracket cylinder (13) is mounted on the outer wall of the slide plate (12) to drive the bag cover flipping bracket (4) to move back and forth. The bag cover flipping bracket cylinder (13) has a third piston rod connected to the bag cover flipping bracket (4) and drives it to move back and forth.

4. The pocket and flap sewing device of a patching machine according to claim 3, characterized in that: The sliding seat (1) is provided with a second guide rail along the vertical direction, and the sliding plate (12) is slidably connected to the second guide rail through the second slider.

5. A pocket and flap sewing device for a patching machine according to claim 3 or 4, characterized in that: The sliding seat (1) is provided with a lifting cylinder mounting block (14), and the lifting cylinder mounting block (14) is provided with a first strip hole (15) along the vertical direction for adjusting the vertical position of the lifting cylinder (11).

6. The pocket and flap sewing device of a patching machine according to claim 1, characterized in that: The third drive assembly includes a front-to-back moving cylinder (16) and a bag-pressing cylinder (17). The front-to-back moving cylinder (16) has a fourth piston rod, which is connected to the bag-pressing cylinder (17) via a bag-pressing cylinder bracket (18) and drives the bag-pressing cylinder (17) to move back and forth. The bag-pressing cylinder (17) has a fifth piston rod, which is connected to the bag-pressing bracket (3) and drives the bag-pressing bracket (3) to move in the up and down direction.

7. The pocket and flap sewing device of a patching machine according to claim 6, characterized in that: The front and rear moving cylinder (16) is mounted on the pressure plate (2) via a front and rear moving cylinder bracket (19), and the front and rear moving cylinder bracket (19) has a second strip hole (20) that can adjust the front and rear position of the front and rear moving cylinder (16).

8. The pocket and flap sewing device of a patching machine according to claim 1, characterized in that: The flap flipping bracket (4) has at least one transversely arranged stitch hole (21) for reinforcing the pocket flap sewing.