Pull cylinder device for sewing machine

Abstract

The utility model provides a folder device for a sewing machine, and belongs to the technical field of garment processing equipment.The folder device comprises a folder body, a guide-in groove and a hemming groove are formed in the folder body, an open groove communicated with the hemming groove is formed in the bottom of the end, away from an inlet of the guide-in groove, of the guide-in groove, an adjusting plate is installed in the hemming groove, and an operating rod is installed on the folder body; the operating rod is arranged in the width direction of the hemming groove, and one end of the operating rod extends into the hemming groove and is connected with the side, away from the notch, of the adjusting plate. The adjusting plate is driven by the operating rod to move in the width direction of the hemming groove, so that the width size of the hemming groove is changed. According to the folder device for the sewing machine, when the hemming width of fabric needs to be adjusted, an operator exerts acting force on the operating rod, so that the operating rod moves in the width direction of the hemming groove, then the adjusting plate is driven to move synchronously, and finally the distance between the adjusting plate and the notch groove is changed; therefore, the sewing requirements of different hemming widths can be met.

Description

Technical Field

[0001] This application belongs to the field of garment processing equipment technology, and more specifically, relates to a pull tube device for a sewing machine. Background Technology

[0002] A hemming roller, also known as a hemming device, is an auxiliary tool used in various garment, leather, and bag sewing equipment. It is primarily used for hemming various fabrics during the sewing process. Existing hemming rollers typically have an inlet groove and a hemming groove, with their length directions corresponding to the fabric's transport during sewing. The fabric first enters through the horizontal inlet of the inlet groove and then enters the hemming groove, where the hem is formed. However, because the width of the hemming groove is not adjustable, existing hemming rollers cannot meet the sewing requirements for various hem widths. Utility Model Content

[0003] The purpose of this application is to provide a pull tube device for a sewing machine, which aims to solve the problem that existing pull tubes cannot meet the sewing requirements of various hem widths.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: a pull cylinder device for a sewing machine is provided, comprising: a pull cylinder body, wherein the pull cylinder body is provided with an inlet groove and a hemming groove, the hemming groove is located below the inlet groove, and a notch communicating with the hemming groove is opened at the bottom of the inlet groove away from its inlet, an adjusting plate is installed in the hemming groove, and an operating rod is installed on the pull cylinder body, the operating rod is arranged along the width direction of the hemming groove, one end of the operating rod extends into the hemming groove and is connected to the side of the adjusting plate opposite to the notch; the operating rod drives the adjusting plate to move along the width direction of the hemming groove, thereby changing the width dimension of the hemming groove.

[0005] In one possible implementation, the adjusting plate slides in conjunction with the bottom surface of the hemming groove, the operating rod is threadedly connected to the pull cylinder body, and the end of the operating rod is rotatably connected to one side of the adjusting plate; by driving the operating rod to rotate forward or backward, the adjusting plate moves within the hemming groove.

[0006] In one possible implementation, a scale is mounted on the bottom surface of the hemmed groove, the scale is arranged along the width direction of the hemmed groove, and the top surface of the scale is flush with the bottom surface of the hemmed groove.

[0007] In one possible implementation, a clamping plate is slidably mounted on the side wall of the adjustment plate near the notch. The clamping plate has a degree of freedom to move in the vertical direction. An elastic element is installed between the clamping plate and the top surface of the hemming groove. The elastic element applies a downward force to the clamping plate. A clamping space for placing fabric is formed between the clamping plate and the bottom surface of the hemming groove.

[0008] In one possible implementation, the top surface of the clamping plate is provided with a limiting post, and the elastic element is fitted onto the limiting post.

[0009] In one possible implementation, a flexible pad is mounted on the bottom surface of the clamping plate.

[0010] In one possible implementation, the bottom surface of the flexible pad is provided with a limiting strip, which is perpendicular to the width direction of the crimping groove.

[0011] In one possible implementation, a gripping rod is mounted on the front sidewall of the clamping plate, the free end of which extends to the outside of the crimped groove.

[0012] In one possible implementation, the gripping rod is hinged to the clamping plate, and the side wall of the clamping plate has a receiving groove for accommodating the gripping rod.

[0013] In one possible implementation, a fixing seat is mounted on the outer wall of the pull tube body, and the fixing seat is mounted on the sewing machine worktable by screws.

[0014] Compared with the prior art, the solution shown in this application is a pull tube device for a sewing machine. An inlet groove and a hemming groove are arranged sequentially from top to bottom on the pull tube body. The opening of the inlet groove is located at one end in the width direction of the inlet groove, and a notch is located at the end of the inlet groove opposite to its opening. Since the notch connects the inlet groove and the hemming groove, the inlet groove, the notch, and the hemming groove form a U-shaped groove. After the fabric enters the inlet groove, it enters the hemming groove through the notch, where the fabric forms a hem. Because the adjusting plate is located inside the hemming groove, the free end of the fabric contacts the adjusting plate, and the lateral distance between the adjusting plate and the notch is the hem width of the fabric. Since the operating rod is located on the side of the adjusting plate opposite to the notch, the operating rod will not affect the fabric entering the hemming groove. When it is necessary to adjust the hem width of the fabric, the operator applies force to the operating rod, causing the operating rod to move along the width direction of the hemming groove, thereby driving the adjusting plate to move synchronously, ultimately changing the distance between the adjusting plate and the notch to match the sewing requirements of different hem widths. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A three-dimensional structural diagram of a pull-out device for a sewing machine provided in Embodiment 1 of this application. Figure 1 ;

[0017] Figure 2 A three-dimensional structural diagram of a pull-out device for a sewing machine provided in Embodiment 1 of this application. Figure 2 ;

[0018] Figure 3 A three-dimensional structural diagram of the clamping plate provided in Embodiment 1 of this application. Figure 1 ;

[0019] Figure 4 A three-dimensional structural diagram of the clamping plate provided in Embodiment 1 of this application. Figure 2 ;

[0020] Figure 5 A three-dimensional structural diagram of a pull-out device for a sewing machine provided in Embodiment 2 of this application. Figure 1 ;

[0021] Figure 6 A three-dimensional structural diagram of a pull-out device for a sewing machine provided in Embodiment 2 of this application. Figure 2 .

[0022] In the diagram: 1. Pull cylinder body; 101. Inlet groove; 102. Edge rolling groove; 103. Notch; 104. Adjustment plate; 105. Operating lever; 106. Scale; 107. Clamping plate; 108. Elastic element; 109. Limiting post; 110. Flexible pad; 111. Limiting strip; 112. Grip rod; 113. Receiving groove; 114. Fixed seat; 115. Fixed plate; 116. Movable plate. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0024] Please refer to the following: Figure 1 and Figure 2This application describes a pull-out device for a sewing machine. The pull-out device includes: a pull-out body 1, on which an inlet groove 101 and a hemming groove 102 are provided. The hemming groove 102 is located below the inlet groove 101. At the bottom of the inlet groove 101 away from its inlet, a notch 103 communicating with the hemming groove 102 is formed. An adjusting plate 104 is installed inside the hemming groove 102. An operating rod 105 is installed on the pull-out body 1. The operating rod 105 is arranged along the width direction of the hemming groove 102, with one end extending into the hemming groove 102 and connected to the side of the adjusting plate 104 opposite to the notch 103. The operating rod 105 drives the adjusting plate 104 to move along the width direction of the hemming groove 102, thereby changing the width of the hemming groove 102.

[0025] This embodiment provides a pull-out device for a sewing machine. Compared with the prior art, the guide groove 101 and the hem-rolling groove 102 are arranged sequentially from top to bottom on the pull-out body 1. The opening of the guide groove 101 is located at one end in the width direction of the guide groove 101, and the notch 103 is located at the end of the guide groove 101 opposite to its opening. Since the notch 103 connects the guide groove 101 and the hem-rolling groove 102, the guide groove 101, the notch 103, and the hem-rolling groove 102 form a U-shaped groove. After the fabric enters the guide groove 101, it enters the hem-rolling groove 102 through the notch 103, and the fabric forms a hem in the hem-rolling groove 102. Since the adjusting plate 104 is located in the hem-rolling groove 102, the free end of the fabric will contact the adjusting plate 104. The lateral distance between the adjusting plate 104 and the notch 103 is the hem width of the fabric. Since the operating lever 105 is located on the side of the adjusting plate 104 opposite to the notch 103, the operating lever 105 will not affect the fabric entering the hem groove 102. When it is necessary to adjust the hem width of the fabric, the operator applies force to the operating lever 105, thereby moving the operating lever 105 along the width direction of the hem groove 102, which in turn drives the adjusting plate 104 to move synchronously, ultimately changing the distance between the adjusting plate 104 and the notch 103 to match the sewing requirements of different hem widths.

[0026] In some embodiments, please refer to Figure 1 and Figure 2The adjusting plate 104 is slidably engaged with the bottom surface of the hemming groove 102. The operating rod 105 is threadedly connected to the pull tube body 1, and the end of the operating rod 105 is rotatably connected to one side of the adjusting plate 104. By driving the operating rod 105 to rotate forward or backward, the adjusting plate 104 is moved within the hemming groove 102. In this embodiment, the adjusting plate 104 is a rectangular plate. The bottom surface of the adjusting plate 104 is slidably engaged with the bottom surface of the hemming groove 102, so there is no gap between the adjusting plate 104 and the bottom surface of the hemming groove 102, which can effectively block the free end of the fabric. Since the operating rod 105 is threadedly connected to the pull tube body 1, and the operating rod 105 is arranged along the width direction of the hemming groove 102, when the operating rod 105 is rotated, the operating rod 105 will generate displacement along the width direction of the hemming groove 102. Since the operating lever 105 is rotatably connected to one side of the adjusting plate 104, the rotation of the operating lever 105 will be converted into the movement of the adjusting plate 104 along the width direction of the hemmed groove 102.

[0027] Because the adjusting plate 104 and the bottom surface of the hemming groove 102 slide tightly together, fabric debris or impurities can be effectively prevented from entering between them during the hemming process, reducing wear caused by friction and extending the service life of the equipment. During long-term use, simply cleaning and maintaining the operating lever 105 and the adjusting plate 104 periodically, checking for loose threaded connections and flexible rotation of rotating parts, will ensure the equipment is always in good working order and efficiently and stably completes the hemming of the fabric.

[0028] In some embodiments, please refer to Figure 2 A scale 106 is mounted on the bottom surface of the hem groove 102. The scale 106 is positioned along the width direction of the hem groove 102, and its top surface is flush with the bottom surface of the hem groove 102. In this embodiment, a groove for mounting the scale 106 is provided on the bottom surface of the hem groove 102. The depth of the groove is equal to the thickness of the scale 106, so the top surface of the scale 106 is flush with the bottom surface of the hem groove 102, thereby preventing the scale 106 from obstructing the movement of the fabric towards the adjustment plate 104. The operator can use the scale 106 to confirm the distance between the adjustment plate 104 and the notch 103, thereby determining whether the position of the adjustment plate 104 is accurate.

[0029] When the position of the adjusting plate 104 needs to be adjusted, the operator only needs to refer to the scale values ​​on the ruler 106 to accurately determine the specific distance between the adjusting plate 104 and the notch 103. If the distance does not meet the requirements, the operator can move the adjusting plate 104 accordingly based on the values ​​displayed on the ruler 106 to bring it to the appropriate position. Moreover, since the top surface of the ruler 106 is flush with the bottom surface of the hemming groove 102, the fabric will not experience any jamming or shifting when moving within the hemming groove 102, ensuring smooth fabric movement. This design not only improves the accuracy of adjusting the position of the adjusting plate 104 but also makes the entire fabric processing process more efficient and stable, reducing the defect rate caused by inaccurate adjustments and bringing great convenience and economic benefits to production.

[0030] In some embodiments, please refer to Figures 1 to 4 A clamping plate 107 is slidably mounted on the side wall of the adjusting plate 104 near the notch 103. The clamping plate 107 has a degree of freedom to move in the vertical direction. An elastic element 108 is installed between the clamping plate 107 and the top surface of the hem groove 102. The elastic element 108 applies a downward force to the clamping plate 107. The clamping plate 107 and the bottom surface of the hem groove 102 form a clamping space for placing the fabric. In this embodiment, the clamping plate 107 is slidably mounted on the side wall of the adjusting plate 104 near the notch 103. Since the clamping plate 107 can move in the vertical direction, the clamping space can be adapted to fabrics of different thicknesses by changing the distance between the clamping plate 107 and the bottom surface of the hem groove 102. Under the action of the elastic element 108, the clamping plate 107 applies a force to the fabric located in the clamping space, thereby preventing the fabric from moving along the width direction of the hem groove 102 and ensuring that the hem width of the fabric remains consistent during the sewing process. The clamping plate 107 has a moderate clamping force on the fabric, which will not affect the transmission of the fabric during the sewing process.

[0031] When processing fabrics of different thicknesses, simply move the clamping plate 107 up or down. Moving it upward increases the clamping space, accommodating thicker fabrics; moving it downward decreases the clamping space, suitable for thinner fabrics. The operation is simple and convenient, allowing for quick adaptation to different fabrics. During actual sewing, the fabric smoothly enters the clamping space under the drive of the conveyor. Due to the stabilizing effect of the elastic element 108 on the clamping plate 107, the fabric will not sway or shift within the hem groove 102. Moreover, the moderate clamping force prevents the fabric from being excessively compressed and deformed during sewing, while effectively fixing the fabric and ensuring precise and uniform hem width. This results in a more aesthetically pleasing and neat hem, greatly improving sewing quality and efficiency. Whether it's a lightweight silk fabric or a thick denim fabric, the ideal hem sewing effect can be achieved by simply adjusting the position of the clamping plate 107, meeting the needs of diverse fabric processing.

[0032] In some embodiments, please refer to Figures 1 to 4 The clamping plate 107 has a limiting post 109 on its top surface, and an elastic element 108 is fitted onto the limiting post 109. In this embodiment, the elastic element 108 is a compression spring. The lower end of the compression spring is in contact with the bottom surface of the clamping plate 107, and the upper end of the compression spring is in contact with the top surface of the rolled edge groove 102. There are two compression springs, which are arranged symmetrically around the center of the clamping plate 107 to ensure the force balance of the clamping plate 107. The limiting post 109 is a cylinder. The compression spring is fitted onto the limiting post 109. The limiting post 109 limits the compression spring and ensures that the compression spring remains relatively stable on the clamping plate 107.

[0033] When an object needs to be clamped, the clamping plate 107 moves upward under external force, compressing the spring and increasing its elastic potential energy. As the compression increases, the spring exerts greater pressure on the top surface of the rolled edge groove 102, simultaneously transmitting a downward reaction force to the clamping plate 107, allowing it to firmly hold the object. Because the two compression springs are symmetrically arranged around the center of the clamping plate 107, the pressure from the object is evenly distributed regardless of its position, preventing clamping instability caused by uneven force distribution. The limiting post 109, being a cylinder, has a smooth surface that reduces friction with the compression spring, allowing it to move smoothly up and down during compression and rebound, further ensuring the stability and reliability of the entire clamping structure. During the clamping process, the compression spring continuously provides elastic force, ensuring stable clamping force and firmly fixing the object between the clamping plates 107. Throughout the process, the limiting post 109 consistently provides effective limiting for the compression spring, maintaining the normal operation of the entire clamping system.

[0034] In some embodiments, please refer to Figure 3 and Figure 4 A flexible pad 110 is installed on the bottom surface of the clamping plate 107. In this embodiment, the flexible pad 110 is made of rubber, which has a certain degree of elasticity. When the clamping plate 107 applies force to the fabric, the flexible pad 110 comes into contact with the fabric, thereby avoiding indentations on the fabric and ensuring the quality of the fabric.

[0035] Meanwhile, due to the excellent flexibility of the rubber flexible pad 110, it can closely conform to the surface contours of the fabric. During clamping, regardless of the irregular shape of the fabric, the flexible pad 110 can adaptively adjust its contact with the fabric, always maintaining a uniform pressure distribution. This ensures effective clamping of the fabric without damaging it due to excessive local pressure. Furthermore, the rubber material also has good wear resistance and aging resistance, enabling it to stably protect the fabric over a long period, reducing the adverse effects on the fabric caused by frequent use and resulting performance degradation of the flexible pad 110. Even over time, it continues to provide reliable protection for the fabric, ensuring strict quality control during production.

[0036] In some embodiments, please refer to Figure 3 and Figure 4 The bottom surface of the flexible pad 110 is provided with a limiting strip 111, which is perpendicular to the width direction of the hem groove 102. In this embodiment, the cross-section of the limiting strip 111 is semi-circular. The limiting strip 111 is elongated. The limiting strip 111 is perpendicular to the width direction of the hem groove 102, that is, the length direction of the limiting strip 111 is consistent with the transmission direction of the fabric during the sewing process. Therefore, the limiting strip 111 is used to restrict the movement of the fabric along the width direction of the hem and will not affect the transmission of the fabric during the sewing process. There are multiple limiting strips 111, which are evenly distributed along the width direction of the hem groove 102.

[0037] The arrangement of multiple evenly distributed limiting strips 111 provides a more stable restraint on the fabric moving along the width of the hem, ensuring that the fabric does not shift during sewing and thus guaranteeing sewing accuracy. Furthermore, the semi-circular cross-section of the limiting strips 111 reduces friction damage to the fabric upon contact, protecting it from excessive wear. Simultaneously, the perpendicular arrangement of the elongated limiting strips 111 to the width of the hem groove 102 creates a stable restraining structure for the entire flexible pad 110 during fabric sewing, effectively improving sewing efficiency and quality. This results in neat, aesthetically pleasing edges on the sewn product and reduces sewing defects caused by unstable fabric positioning.

[0038] In some embodiments, please refer to Figure 3 and Figure 4 A gripping rod 112 is mounted on the front sidewall of the clamping plate 107, with its free end extending to the outside of the hemming groove 102. In this embodiment, the gripping rod 112 is mounted on the front side of the clamping plate 107. Since the free end of the gripping rod 112 extends to the outside of the hemming groove 102, the operator can apply an upward force to the gripping rod 112 from the outside of the pull tube body 1, thereby increasing the clamping space and facilitating the fabric to enter the clamping space. The operator can easily control the size of the clamping space without having to go deep into the pull tube, greatly saving time and effort.

[0039] In some embodiments, please refer to Figure 3 and Figure 4 The gripping rod 112 is hinged to the clamping plate 107, and the side wall of the clamping plate 107 is provided with a receiving groove 113 for accommodating the gripping rod 112. In this embodiment, since the gripping rod 112 and the clamping plate 107 are hinged, when it is necessary to move the clamping plate 107, the gripping rod 112 is rotated to be perpendicular to the side wall of the clamping plate 107. At this time, the free end of the gripping rod 112 is located outside the rolled edge groove 102, which facilitates the gripping operation of the gripping rod 112. When it is not necessary to move the clamping plate 107, the gripping rod 112 is rotated into the receiving groove 113, thereby realizing the storage of the gripping rod 112 and avoiding accidental operation of the gripping rod 112.

[0040] In practical use, this design brings great convenience. Workers can easily adjust the grip lever 112 to the appropriate operating position with a simple turn, eliminating the need to spend excessive time finding a suitable grip position and greatly improving work efficiency. Furthermore, after work, the grip lever 112 can be stored in the receiving slot 113, making the entire device look neater and reducing the risk of accidents such as collisions caused by protruding external parts. In addition, this simple yet practical design also reduces manufacturing costs and improves product reliability and durability.

[0041] In some embodiments, please refer to Figure 1 and Figure 2 A fixing seat 114 is installed on the outer wall of the pull tube body 1, and the fixing seat 114 is installed on the sewing machine worktable by screws. In this embodiment, the fixing seat 114 is fixed to the outer wall of the pull tube body 1 by welding. The fixing seat 114 has an elongated hole for installing screws. The screw passes through the elongated hole to fix the pull tube body 1 to the sewing machine worktable, ensuring the relative stability of the pull tube body 1 during operation.

[0042] When the position of the pull tube body 1 needs to be adjusted, the screw can be moved within a certain range through the elongated hole to achieve fine-tuning of the position of the pull tube body 1. This better adapts to different sewing needs. For example, when sewing fabrics of different widths, the position of the pull tube body 1 can be precisely adjusted according to the actual situation, resulting in more accurate sewing results. Moreover, since the fixing seat 114 is fixed to the pull tube body 1 by welding, the connection is firm and not easy to loosen, which can maintain the stable installation state of the pull tube body 1 on the worktable for a long time, reducing sewing quality problems caused by loosening. In long-term sewing work, this stable installation structure can effectively improve work efficiency, reduce the time cost of frequent adjustments due to changes in the position of the pull tube, and make sewing work smoother and more efficient.

[0043] In some embodiments, please refer to Figure 5 and Figure 6 A support plate is fixedly installed on the bottom surface of the inlet groove 101. One end of the support plate passes through the opening of the inlet groove 101 and extends outward. The support plate increases the support area for the fabric, thereby preventing the fabric from moving outward due to its own weight. The support plate includes a fixed plate 115 and a movable plate 116. The fixed plate 115 is fixedly installed on the bottom surface of the inlet groove 101, and the movable plate 116 is rotatably connected to the fixed plate 115, extending to the outside of the inlet groove 101. The end of the operating rod 105 located outside the pull tube body 1 is directly below the movable plate 116. The movable plate 116 acts as a shield for the operating rod 105, preventing the operating rod 105 from affecting the fabric transmission. When it is necessary to rotate the operating rod 105, the movable plate 116 can be rotated to a vertical position, exposing the operating rod 105, thus facilitating the gripping and operation of the operating rod 105. The rotation axis of the movable plate 116 is located on the inner side of the outer wall of the pull tube body 1. Therefore, when the movable plate 116 rotates to the horizontal state, the bottom surface of the movable plate 116 just fits with the bottom surface of the guide groove, thereby keeping the movable plate 116 in the horizontal state.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pull-out device for a sewing machine, characterized in that, include: The pull tube body has an inlet groove and a hemming groove. The hemming groove is located below the inlet groove. The bottom of the inlet groove, away from its inlet, has a notch that communicates with the hemming groove. An adjusting plate is installed inside the hemming groove. An operating rod is installed on the pull tube body. The operating rod is arranged along the width direction of the hemming groove. One end of the operating rod extends into the hemming groove and is connected to the side of the adjusting plate opposite to the notch. The operating rod drives the adjusting plate to move along the width direction of the hemming groove, thereby changing the width of the hemming groove.

2. The pull-out device for a sewing machine as described in claim 1, characterized in that, The adjusting plate slides in conjunction with the bottom surface of the curling groove, the operating rod is threadedly connected to the pull cylinder body, and the end of the operating rod is rotatably connected to one side of the adjusting plate; by driving the operating rod to rotate forward or backward, the adjusting plate moves within the curling groove.

3. The pull-out device for a sewing machine as described in claim 1, characterized in that, A scale is installed on the bottom surface of the hemmed groove. The scale is set along the width direction of the hemmed groove, and the top surface of the scale is flush with the bottom surface of the hemmed groove.

4. The pull-out device for a sewing machine as described in claim 1, characterized in that, A clamping plate is slidably mounted on the side wall of the adjustment plate near the notch. The clamping plate has a degree of freedom to move in the vertical direction. An elastic element is installed between the clamping plate and the top surface of the hem groove. The elastic element applies a downward force to the clamping plate. The clamping plate and the bottom surface of the hem groove form a clamping space for placing the fabric.

5. A pull-out device for a sewing machine as described in claim 4, characterized in that, The top surface of the clamping plate is provided with a limiting post, and the elastic element is fitted onto the limiting post.

6. A pull-out device for a sewing machine as described in claim 4, characterized in that, A flexible pad is installed on the bottom surface of the clamping plate.

7. A pull-out device for a sewing machine as described in claim 6, characterized in that, The bottom surface of the flexible pad is provided with a limiting strip, which is perpendicular to the width direction of the rolled edge groove.

8. A pull-out device for a sewing machine as described in claim 4, characterized in that, A gripping rod is installed on the front sidewall of the clamping plate, and the free end of the gripping rod extends to the outside of the crimped groove.

9. A pull-out device for a sewing machine as described in claim 8, characterized in that, The gripping rod is hinged to the clamping plate, and the side wall of the clamping plate is provided with a receiving groove for accommodating the gripping rod.

10. A pull-out device for a sewing machine as described in claim 1, characterized in that, A fixing seat is installed on the outer wall of the pull tube body, and the fixing seat is installed on the worktable of the sewing machine by screws.

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