Spring device for sewing bags

Abstract

The application discloses a cloth bag sewing and assembling spring device, which comprises a cloth feeding unit, a spring feeding unit, a sewing unit and a spring arranging unit. The cloth feeding unit comprises a hemming slide plate, and a cloth folding stopper is arranged below the hemming slide plate. A cloth feeding roller is arranged on one side of the hemming slide plate. The spring feeding unit comprises a guide column, and a spring machine is connected to a feeding end of the guide column. A spring pressing assembly is arranged on one side of the guide column, and a spring pushing assembly is arranged on the feeding end of the guide column. The sewing unit comprises a first sewing platform and a second sewing platform. A sewing machine capable of moving horizontally is arranged on one side of the first sewing platform, and a lock edge machine is arranged on one side of the second sewing platform. The spring arranging unit comprises a spring arranging plate, and a spring arranging opening is formed in the spring arranging plate. A pushing block is arranged above the spring arranging opening, and a pushing plate is arranged below the spring arranging opening. The cloth bag can be automatically folded, the spring can be automatically compressed and fed into the folded cloth bag, the opening of the folded cloth bag can be automatically sewn and positioned, the spring can be automatically pushed to the transverse direction, the efficiency is high, the sewing consistency is good, the spring arrangement is uniform, and the mattress production quality is good.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mattress production, and particularly relates to a cloth bag sewing and assembling spring device. BACKGROUND

[0002] At present, spring assembling is needed in the production process of a mattress. When operating, non-woven cloth is first folded into a bag, then a row of springs is inserted from the folded opening of the non-woven cloth, the springs are compressed by a tool, and sewing is performed between the two springs by a sewing machine to position the springs apart; in addition to arranging the adjacent springs apart, the folded opening of the non-woven cloth also needs to be sewn to ensure that the springs cannot leak out, and finally the springs are arranged horizontally. The traditional assembling method is manual operation, which needs to be completed by multiple people, is complicated to operate, has low efficiency, and has poor consistency of the sewing position, uneven arrangement of the spring position, and poor overall assembling effect, which finally affects the production quality of the mattress. Therefore, a cloth bag sewing and assembling spring device is designed to solve the above problems.

[0003] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely describing the technical scheme of the application, and for the convenience of understanding by those skilled in the art. The above technical scheme cannot be considered as known to those skilled in the art only because it is described in the background section of the application. SUMMARY

[0004] In order to overcome the deficiencies in the prior art, the purpose of the present application is to provide a cloth bag sewing and assembling spring device.

[0005] In order to achieve the above purposes and other related purposes, the technical scheme provided by the present application is: a cloth bag sewing and assembling spring device, comprising:

[0006] A cloth feeding unit, the cloth feeding unit comprises a folding edge sliding plate for cloth folding, and a cloth folding stop rod is arranged below the folding edge sliding plate; a cloth feeding roller is arranged on one side of the folding edge sliding plate, and a driving roller is arranged on the other side of the folding edge sliding plate;

[0007] A spring feeding unit, the spring feeding unit comprises a guide column, the guide column is connected with a spring outlet of a spring machine at a material receiving end, a spring flattening assembly is arranged on one side of the guide column, and a spring pushing assembly is arranged at a feeding end of the guide column; the function of the spring feeding unit is to push the flattened springs produced by the spring machine into the folded cloth.

[0008] The sewing unit comprises a first sewing platform and a second sewing platform arranged in sequence along a conveying direction, the first sewing platform is provided with a first drape plate, and the second sewing platform is provided with a second drape plate; one side of the first sewing platform is provided with a horizontally movable sewing machine, the moving direction of the sewing machine is perpendicular to the conveying direction of the cloth on the sewing platform; one side of the second sewing platform is provided with a lock stitch machine; the lock stitch machine remains fixed, the front end needle of the lock stitch machine is arranged above the opening position of the cloth that needs to be sewn, and when the cloth is conveyed forward, the cloth is sewn by the lock stitch machine while moving.

[0009] The row spring unit comprises a row spring plate, a movable push block arranged above the row spring opening, and a rotatable push plate arranged below the row spring opening. The row spring unit is used to adjust the originally vertically arranged spring to a horizontally arranged state.

[0010] Further, the upper side of the folding edge sliding plate is provided with an adjustable pressing plate. In this scheme, the arrangement of the pressing plate can limit and shape the conveying of the cloth, thereby improving the accuracy and flatness of the cloth conveying.

[0011] Further, the discharge end of the folding edge sliding plate is an isosceles triangle. In this scheme, the design of the isosceles triangle facilitates the folding of the cloth and improves the neatness of the folded cloth.

[0012] Further, the cloth folding stop rod is provided with two, and the cloth passes through the two cloth folding stop rods after being folded downward. In this scheme, the cloth folding stop rod is arranged to better fold the cloth.

[0013] Further, the push spring assembly comprises a spring receiving plate, a spring pressing groove is arranged on the spring receiving plate, the spring pressing assembly comprises a spring pressing plate that can move up and down, and the spring pressing plate is arranged correspondingly to the spring pressing groove; a spring outlet is arranged on the side of the spring receiving plate close to the sewing unit, and a push spring plate that can move back and forth along the direction of the spring pressing groove is arranged on the side of the spring receiving plate away from the sewing unit. In this scheme, the end of the push spring plate in contact with the spring is arc-shaped, the push spring plate is connected with a driving member such as a cylinder, and after the spring is compressed in the spring pressing groove, it is pushed into the folded cloth in the sewing unit. The opening position of the folded cloth is inserted into the side of the spring receiving groove close to the sewing unit.

[0014] Further, a guide groove is arranged on the spring pressing plate, a plurality of limiting columns are arranged around the spring pressing groove, the upper end of the limiting column penetrates the guide groove, and the lower end of the guide column extends above the spring pressing groove. In this scheme, the spring is sent into the spring pressing groove through the guide column, and then the spring pressing plate is pressed downward along the limiting column to flatten the spring in the spring pressing groove.

[0015] Further, the lower part of the guide column is provided with a rolling brush which can be in contact with the spring on the guide column. In this scheme, the rolling brush can brush the spring on the guide column into the spring pressing groove of the spring receiving plate, and the feeding is convenient.

[0016] Further, two parallel pressing strips are arranged between the first cover plate and the second cover plate, the arrangement direction of the two pressing strips is perpendicular to the conveying direction of the cloth on the sewing platform, the lower part of the two pressing strips is provided with a pad, the pressing strips move up and down, and the needle of the sewing machine is arranged at the middle position of the two pressing strips. In this scheme, when the cloth moves to the position to be sewn, the pressing strips press the cloth tightly on the pad, and the sewing machine moves the sewing thread to ensure firm sewing.

[0017] Further, one side of the first cover plate is provided with a reversible assembly which is arranged on the first sewing platform and connected with the first cover plate in transmission. In this scheme, the reversible assembly can be a hinge structure, or a rotating shaft arranged on the first sewing platform, and the rotating shaft is connected with the first cover plate through a connecting block.

[0018] Further, the first sewing platform and the second sewing platform are both provided with a rolling opening, the rolling opening is provided with a rolling assembly, the rolling assembly includes an upper roller arranged above the rolling opening and a lower roller arranged below the rolling opening, and the upper roller and the lower roller are arranged in correspondence and in contact. In this scheme, the cloth passes between the upper roller and the lower roller of the rolling assembly, which can play a role in rolling positioning, improve the accuracy of the sewing thread, and also can shape the cloth to a certain extent. A plurality of rolling openings can be arranged according to the length of the sewing platform to meet the needs of stable and accurate conveying.

[0019] By using the above technical scheme, the present application has the following beneficial effects compared with the prior art:

[0020] The cloth bag sewing and assembling spring device designed in the present application can realize automatic folding of non-woven fabric, automatic compression and feeding of the spring into the folded cloth bag, automatic sewing of the opening of the folded cloth bag, automatic turning of the spring to the horizontal direction, high automation, high efficiency, simple operation, good consistency of sewing position, uniform arrangement of springs, good assembling effect, and guaranteed production quality of the mattress. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic view of the overall structure of the cloth bag sewing and assembling spring device of the present application.

[0022] Figure 2 It is a schematic view of the cloth feeding unit structure of the present application.

[0023] Figure 3 Structure diagram of the spring feeding unit of the present application;

[0024] Figure 4 Structure diagram of the stitching unit of the present application;

[0025] Figure 5 Structure diagram of the stitching unit of the present application;

[0026] Figure 6 Structure diagram of the rolling assembly of the present application;

[0027] Figure 7 Structure diagram of the spring arranging unit of the present application;

[0028] Figure 8 Structure diagram of the spring arranging unit of the present application;

[0029] In the above drawings, 1, cloth feeding unit; 101, edge folding slide plate; 102, cloth folding stopper; 103, feeding roller; 104, driving roller; 105, guide roller; 106, cloth pressing plate; 2, spring feeding unit; 201, guide column; 202, spring machine; 203, spring receiving plate; 204, spring pressing groove; 205, limiting column; 206, spring outlet; 207, spring pushing plate; 208, spring pressing plate; 209, guide groove; 210, rolling brush; 3, stitching unit; 301, first stitching platform; 302, second stitching platform; 303, first cover plate; 304, second cover plate; 305, sewing machine; 306, overlock machine; 307, pressing strip; 308, cushion plate; 309, air cylinder; 310, rotating shaft; 311, handle; 312, rolling opening; 313, rolling assembly; 3131, upper roller; 3132, lower roller; 4, spring arranging unit; 401, spring arranging plate; 402, spring arranging opening; 403, shifting block; 404, shifting plate; 405, rotating shaft; 5, cloth. DETAILED DESCRIPTION

[0030] The above description discloses the preferred embodiments of the present application. However, the present application is not limited to the above embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the above description.

[0031] It should be noted that in the description of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance. The terms "horizontal", "vertical", "suspension" and the like do not mean that the components must be absolutely horizontal or suspended, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0034] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the protection scope of the present application can be more clearly and definitely defined.

[0035] Embodiment: The present embodiment provides a cloth bag sewing assembly spring device, comprising:

[0036] The cloth feeding unit 1, see Figure 1 and attached Figure 2As shown, the cloth feeding unit 1 includes a folding edge slide plate 101 for folding cloth 5, and a cloth folding stopper 102 is arranged below the folding edge slide plate 101; one side of the folding edge slide plate 101 is provided with a cloth feeding roller 103, wherein the cloth feeding roller 103 is arranged for placing the cloth 5 roll, facilitating continuous feeding. The other side of the folding edge slide plate 101 is provided with a driving roller 104; wherein the driving roller 104 is connected with the driving device, which is a driving roller, and a plurality of guide rollers 105 are arranged between the cloth folding stopper 102 and the driving roller 104, and a plurality of guide rollers 105 are also arranged between the folding edge slide plate 101 and the cloth feeding roller 103, which facilitates the control of the cloth 5 running direction.

[0037] A cloth pressing plate 106 that can be adjusted up and down is arranged above the folding edge slide plate 101. The arrangement of the cloth pressing plate 106 can limit and shape the transmission of the cloth 5, improving the accuracy and flatness of the cloth 5 transmission. The discharge end of the folding edge slide plate 101 is an isosceles triangle. When the cloth 5 is conveyed to the discharge end, the cloth 5 on both sides can be folded together after being folded downward, and the design of the isosceles triangle facilitates the folding of the cloth 5 and improves the neatness of the folded cloth 5. The cloth folding stopper 102 is provided with two, and the cloth 5 passes through the two cloth folding stoppers 102 after being folded downward through the folding edge slide plate 101. The arrangement of two cloth folding stoppers 102 can make the cloth 5 better folded.

[0038] The spring feeding unit 2, see the accompanying Figure 1 and the accompanying Figure 3 As shown, the spring feeding unit 2 includes a guide column 201, the guide column 201 is connected with the spring outlet 206 of a spring machine 202 at the cloth receiving end, one side of the guide column 201 is provided with a spring flattening assembly, and the feeding end of the guide column 201 is provided with a spring pushing assembly; the function of the spring feeding unit 2 is to push the flattened spring produced by the spring machine 202 into the middle of the folded cloth 5.

[0039] The spring pushing assembly includes a spring receiving plate 203, the spring receiving plate 203 is provided with a spring pressing groove 204, the spring pressing assembly includes a spring pressing plate 208 that can move up and down, and the spring pressing plate 208 is arranged correspondingly with the spring pressing groove 204; the side of the spring receiving plate 203 close to the sewing unit 3 is provided with a spring outlet 206, and the side of the spring receiving plate 203 away from the sewing unit 3 is provided with a spring pushing plate 207 that can move back and forth along the direction of the spring pressing groove 204. The end of the spring pushing plate 207 in contact with the spring is arc-shaped, and the spring pushing plate 207 is connected with a driving member such as a cylinder 309. After the spring is compressed in the spring pressing groove 204, it is pushed into the folded cloth 5 in the sewing unit 3, wherein the side of the spring receiving groove close to the sewing unit 3 is inserted into the opening position of the folded cloth 5.

[0040] The compression spring plate 208 has a guide groove 209. Several limiting posts 205 are arranged around the compression spring groove 204. The upper ends of the limiting posts 205 are bent outwards to facilitate the insertion of the spring onto the guide posts 201 and also to guide the spring. The upper ends of the limiting posts 205 penetrate the guide groove 209, and the lower ends of the guide posts 201 pass through the guide groove 209 and extend above the compression spring groove 204. The spring is fed into the compression spring groove 204 through the guide posts 201. Then, the compression spring plate 208 presses down along the limiting posts 205 to flatten the spring in the compression spring groove 204. The limiting posts 205 are located around the compression spring groove 204, preventing the compression spring plate 208 from shifting its position and ensuring the spring is flattened properly.

[0041] A roller brush 210 is provided below the guide post 201, and the roller brush 210 can abut against the spring on the guide post 201. The roller brush 210 is used to brush the spring on the guide post 201 into the compression spring groove 204 of the spring receiving plate 203. The guide post 201 is bent to prevent the spring from falling directly into the compression spring groove 204, which facilitates the control of spring delivery.

[0042] Suture unit 3, see appendix Figure 4 and attached Figure 5 As shown, the sewing unit 3 includes a first sewing platform 301 and a second sewing platform 302 arranged sequentially along the conveying direction. A first cover plate 303 is provided on the first sewing platform 301, and a second cover plate 304 is provided on the second sewing platform 302. Both the first cover plate 303 and the second cover plate 304 are used to press down the folded fabric 5 and the flattened spring, facilitating the sewing process. The open side of the fabric 5 faces the spring feeding unit 2. A horizontally movable sewing machine 305 is provided on one side of the first sewing platform 301. The moving direction of the sewing machine 305 is perpendicular to the conveying direction of the fabric 5 on the sewing platform. The sewing machine 305 is connected to a drive device to achieve horizontal movement. An overlock machine 306 is provided on one side of the second sewing platform 302. The overlock machine 306 is kept fixed, and the front needle of the overlock machine 306 is positioned above the opening of the fabric 5 where sewing is required. When the fabric 5 is conveyed forward, it moves while being sewn by the overlock machine 306.

[0043] Two parallel pressure strips 307 are arranged between the first cover plate 303 and the second cover plate 304. The direction of the two pressure strips 307 is perpendicular to the conveying direction of the fabric 5 on the sewing platform. A pad 308 is arranged below the two pressure strips 307. The pressure strips 307 are moved up and down. The needle of the sewing machine 305 is positioned in the middle of the two pressure strips 307. The pressure strips 307 are connected to the transmission components such as the cylinder 309 to realize up and down movement. When the fabric 5 moves to the position where it needs to be sewn, the pressure strips 307 press down, pressing the fabric 5 firmly onto the pad 308. Then the sewing machine 305 moves the sewing thread. The number of stitches can be adjusted as needed, and multiple stitches can be made to ensure a strong seam.

[0044] A flip-up component is provided on one side of the first cover plate 303. The flip-up component is mounted on the first sewing platform and is connected to the first cover plate 303 in a transmission manner. The flip-up component can be a hinge structure or a rotating shaft 310 rotatably mounted on the first sewing platform. The rotating shaft 310 is connected to the first cover plate 303 through a connecting block. A handle 311 is provided at the upper end of the first cover plate 303. The operator can rotate and open the cover plate by operating the handle 311, which facilitates the placement of the fabric 5 and is relatively convenient to operate.

[0045] Both the first and second sewing platforms are provided with rolling openings 312, and the rolling openings 312 are equipped with rolling components 313. (See attached diagram) Figure 6 As shown, the rolling assembly 313 includes an upper roller 3131 positioned above the rolling opening 312 and a lower roller 3132 positioned below the rolling opening 312. The upper roller 3131 and the lower roller 3132 are positioned vertically opposite each other and abut against each other. The fabric 5 passes between the upper roller 3131 and the lower roller 3132 of the rolling assembly 313, which serves to roll and position the fabric, improving the accuracy of the stitching and also providing some shaping effect. Multiple rolling openings 312 can be provided according to the length of the sewing platform to meet the requirements of stable and precise conveying.

[0046] Spring unit 4, see appendix Figure 7 and attached Figure 8 As shown, the spring-releasing unit 4 includes a spring-releasing plate 401 with a spring-releasing opening 402. A movable lever 403 is positioned above the spring-releasing opening 402, and a rotatable lever 404 is positioned below it. The lever 404 is mounted on a rotating shaft 405, which is connected to a motor to achieve rotation. The spring-releasing unit 4 is used to adjust the originally vertical spring to a horizontal position. When the fabric 5 passes above the spring-releasing opening 402, the spring is no longer flattened. Through the combined action of the upper lever 403 and the lower lever 404, the spring is rotated to a horizontal position. The spring-releasing unit 4 also includes a guide roller, which is located above the spring-releasing plate 401 and upstream of the spring-releasing opening 402. The guide roller is connected to a drive device and serves to guide and pull the fabric 5.

[0047] Principle: The non-woven fabric 5 is fed by the fabric feeding unit 1, the fabric 5 is wound on the fabric feeding roller 103, and the fabric 5 is continuously fed by the driving member, and after the fabric 5 passes through the fabric outlet end of the edge folding slide plate 101, the two sides are folded downward, and after being folded, the fabric 5 passes through two fabric folding stop rods 102, and after passing through a plurality of guide rollers 105, the fabric 5 is sent to the sewing unit 3. The fabric 5 is sequentially transmitted forward on the first sewing platform 301 and the second sewing platform 302 of the sewing unit 3, wherein the push spring plate 207 of the spring feeding unit 2 will send the flattened spring into the folded fabric 5, and the fabric 5 with the spring will be sewn between the two springs by the sewing machine 305 during the conveying process, so that each spring is positioned apart; the folded opening of the non-woven fabric is sewn by the overlock machine 306 to ensure that the spring does not leak out, and then the sewn non-woven fabric is sent to the spring arranging unit 4. The spring arranging unit 4 turns the spring to a horizontal state through the joint action of the upper dial block 403 and the lower dial plate 404.

[0048] The spring device for sewing and assembling the cloth bag designed by the application can realize automatic folding of the non-woven fabric, automatic compression and feeding of the spring into the folded cloth bag, automatic sewing and positioning between the two springs, automatic sewing of the opening of the folded cloth bag, and automatic dialing of the spring to the horizontal direction. The application has high automation degree, high efficiency, simple operation, good consistency of sewing position, uniform spring arrangement, good assembly effect, and ensures the production quality of the mattress.

[0049] The above embodiments are only for illustrating the technical concept and characteristics of the application, and the purpose is to enable those skilled in the art to understand the content of the application and implement it, and cannot limit the protection scope of the application. Any equivalent changes or modifications made according to the spirit and essence of the application should be covered within the protection scope of the application.

Claims

1. A bag sewing assembly spring device characterized by, The utility model relates to a kind of spring sewing machine, including: The cloth feeding unit (1) includes the edge folding slide (101) for cloth (5) folding, and the lower part of the edge folding slide (101) is provided with cloth folding stop rod (102);One side of the edge folding slide (101) is provided with a material feeding roller (103), and the other side of the edge folding slide (101) is provided with a driving roller (104); The spring feeding unit (2) includes a guide column (201), and the material receiving end of the guide column (201) is connected with the discharge port of a spring machine (202). One side of the guide column (201) is provided with a spring flattening assembly, and the feeding end of the guide column (201) is provided with a spring pushing assembly. The sewing unit (3) includes a first sewing platform (301) and a second sewing platform (302) arranged in sequence along the conveying direction. The first sewing platform (301) is provided with a first drape plate (303), and the second sewing platform (302) is provided with a second drape plate (304). One side of the first sewing platform (301) is provided with a sewing machine (305) capable of moving horizontally. The moving direction of the sewing machine (305) is perpendicular to the conveying direction of the cloth (5) on the first sewing platform (301). One side of the second sewing platform (302) is provided with a lock edge machine (306). The spring arranging unit (4) includes a spring arranging plate (401), and the spring arranging plate (401) is provided with a spring arranging opening (402). The spring arranging opening (402) is provided with a movable push block (403) above and a rotatable push plate (404) below.

2. A bag sewing assembly spring device according to claim 1, wherein: The upper part of the edge folding slide (101) is provided with a cloth pressing plate (106) capable of adjusting up and down.

3. A bag sewing assembly spring device according to claim 1, wherein: The discharge end of the edge folding slide (101) is an isosceles triangle.

4. A bag sewing assembly spring device according to claim 1, wherein: The cloth folding stop rod (102) is provided with two, and the cloth (5) passes through the edge folding slide (101) and is folded downward, and then passes through the two cloth folding stop rods (102).

5. A bag sewing assembly spring device according to claim 1, wherein: The spring pushing assembly includes a spring receiving plate (203), and the spring receiving plate (203) is provided with a spring pressing groove (204). The spring pressing assembly includes a spring pressing plate (208) capable of moving up and down, and the spring pressing plate (208) is correspondingly arranged with the spring pressing groove (204). The spring receiving plate (203) is provided with a spring discharging opening (206) on one side close to the sewing unit (3), and the spring receiving plate (203) is provided with a spring pushing plate (207) capable of moving back and forth along the direction of the spring pressing groove (204) on the side away from the sewing unit (3).

6. A bag sewing assembly spring device according to claim 5, wherein: The spring pressing plate (208) is provided with a guide groove (209), and a plurality of limiting columns (205) are arranged around the spring pressing groove (204). The upper end of the limiting column (205) penetrates the guide groove (209) and extends above the spring pressing groove (204).

7. A bag sewing assembly spring device according to claim 1, wherein: The lower part of the guide column (201) is provided with a rolling brush (210), which can be in contact with the spring on the guide column (201).

8. A bag sewing assembly spring device according to claim 1, wherein: Two parallel pressing strips (307) are arranged between the first cover plate (303) and the second cover plate (304), the arrangement direction of the two pressing strips (307) is perpendicular to the conveying direction of the cloth (5) on the sewing platform, the lower part of the two pressing strips (307) is provided with a pad (308), the pressing strips (307) are arranged in up and down movement, and the needle of the sewing machine (305) is arranged at the middle position of the two pressing strips (307).

9. A bag sewing assembly spring device according to claim 1, wherein: One side of the first cover plate (303) is provided with a reversible assembly, which is arranged on the first sewing platform (301) and is in transmission connection with the first cover plate (303).

10. A bag sewing assembly spring device according to claim 1, wherein: The first sewing platform (301) and the second sewing platform (302) are both provided with a rolling opening (312), the rolling opening (312) is provided with a rolling assembly (313), the rolling assembly (313) includes an upper roller (3131) arranged above the rolling opening (312) and a lower roller (3132) arranged below the rolling opening (312), and the upper roller (3131) and the lower roller (3132) are arranged in up and down correspondence and contact.

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