Flanging mechanism of front bag machine

Abstract

A flanging mechanism of a front bag machine comprises a bottom plate, a presser foot assembly, a material turning assembly, a first driving part, a second driving part, a third driving part and the like, and the presser foot assembly is arranged on the bottom plate in a front-back moving mode and provided with a presser foot capable of turning over up and down. The first driving part is rotationally arranged on the presser foot assembly and can synchronously move along with the presser foot assembly to drive the presser foot to turn over, and the material turning assembly is arranged on the bottom plate in a front-back moving mode and used for turning over the welt sewn with the first sewing thread from front to back so as to facilitate subsequent second sewing. Due to the fact that the presser foot assembly used for pressing the welt cloth and the overturning assembly used for overturning the welt cloth both adopt a brand-new driving mode, the overall layout of the flanging device can be more compact, and the presser foot assembly and the overturning assembly can achieve accurate positioning in the front-back moving process. Therefore, the presser foot assembly and the turnover assembly can be better matched with the machine head of the sewing machine to work, and finally double-thread sewing with higher quality is completed.

Description

Technical Field

[0001] This utility model relates to the field of garment machinery technology, specifically to a flanging mechanism for a front pocket machine. Background Technology

[0002] Clothing and trousers are essential daily necessities. Trousers typically have front and back pockets, serving not only to carry items but also for decorative purposes. The opening of the front pocket usually has a facing sewn on to prevent deformation and wear, and also for aesthetic purposes. In the manufacturing process, the pocket fabric, trouser pieces, and facing are sewn together first. Then, the facing is turned inside out and sewn onto the adjacent area. This method conceals any rough edges between the trouser pieces and the facing, and makes the turned-out facing smoother. Currently, the common method is to sew manually, then turn the facing inside out, and then sew again. This is not only inefficient but also results in wrinkles and inconsistent thread lengths. With the development of sewing equipment, some devices have emerged that allow for manual feeding, turning, and automatic sewing. These devices press and clamp the pocket fabric, trouser pieces, and facing below the sewing machine for sewing, greatly improving efficiency and standardizing thread lengths. However, the subsequent manual turning still results in wrinkles and affects overall processing efficiency, failing to meet the actual needs of manufacturers.

[0003] In view of the above, some devices that can automatically flip the edge of the trouser pocket have also appeared on the market. For example, the Chinese utility model patent application number 202120103091.7 (authorization announcement number CN214244824U) discloses "An Automatic Flipping Device for Seaming Front Trouser Pocket Edges", which includes a base, a connecting plate, and a machine head. The machine head includes a base plate, and extension plates are formed on the left and right sides of the base plate. A pressing groove is provided at the front end of the base plate, and an edge-sealing base plate is provided in the pressing groove. An edge-sealing base plate seat is provided behind the pressing groove. An edge-sealing base plate cylinder is provided on the connecting plate, and the edge-sealing base plate cylinder is connected to the edge-sealing base plate seat. A flanging frame is provided in front of the bottom plate, and flanging connecting plates are formed at the left and right ends of the flanging frame. An elongated hole is provided in the middle of the flanging connecting plate, and a gasket is placed in the elongated hole. A flanging connecting fixing plate is provided above the flanging connecting plate. The flanging connecting fixing plate is pressed against the gasket and connected to the bottom plate by the flanging connecting fixing plate screws. A gap is formed between the flanging connecting fixing plate and the bottom plate so that the flanging connecting plate can slide along the direction of the elongated hole. There is a flanging cylinder on the extension plate, and the flanging cylinder is connected to one end of the flanging connecting plate. The flanging device with this structure improves the processing efficiency of the front trouser pocket and eliminates the wrinkling problem that occurs in manual flanging.

[0004] However, such automatic hemming devices also suffer from overly complex drive structures. Therefore, how to provide a novel drive method that makes the overall layout of the hemming device more compact and optimized, and how to make the movement and positioning of the presser foot mechanism for pressing the edge fabric and the flipping structure for flipping the edge fabric more precise, are problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a front pocket machine with a novel structure, compact layout, and precise positioning of both the presser foot assembly used for pressing the edge-fitting fabric and the flipping assembly used for flipping the edge-fitting fabric, in light of the above-mentioned technical status.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the flanging mechanism of the front bag machine includes a base plate for fixing the front bag piece and has a through hole that runs through the top and bottom.

[0007] The presser foot assembly is mounted on the base plate in a back-and-forth motion manner and has a presser foot that can be flipped up and down. In the flipped-down state, the presser foot can pass through the through hole to press the edge tightly onto the front pocket piece.

[0008] The flipping assembly is mounted on the base plate and can be moved back and forth to flip the edge of the first stitch that has been sewn from front to back.

[0009] The first driving component is rotatably mounted on the presser foot assembly and can move synchronously with the presser foot assembly. Its driving end is connected to the presser foot to drive the presser foot to flip up and down.

[0010] The second driving component drives the pressure foot assembly to move back and forth.

[0011] The third driving component drives the material turning assembly to move back and forth.

[0012] To optimize the overall structure of the presser foot assembly and enable it to better perform pressing and lateral movements, preferably, the presser foot assembly further includes a mounting base that can move back and forth relative to the base plate. A guide rail assembly is provided between the mounting base and the base plate to facilitate the back and forth movement of the mounting base. The driving end of the second driving member is connected to the mounting base. A first shaft hole arranged laterally is formed on the mounting base. A rotating member that can rotate around its own axis passes through the first shaft hole. A hinge portion that deviates from the axis is formed on the rotating member. The driving end of the first driving member is hinged to the hinge portion to drive the rotating member to rotate. The presser foot is mounted on the rotating member and rotates synchronously with the rotating member.

[0013] In order to better form the first shaft hole on the mounting base, preferably, the front end of the mounting base is provided with a first connector, the first shaft hole is formed on the first connector, and the first connector is provided with a first waist hole that runs through from top to bottom. The first connector is fixed on the mounting base in a way that can be adjusted back and forth by setting a first fastener.

[0014] In order to enable the first driving member to rotate better on the mounting base, preferably, the rear end of the mounting base is provided with a second connecting member, the second connecting member having a laterally extending connecting shaft formed thereon, and the side of the first driving member is provided with a second shaft hole that allows the connecting shaft to rotate and adapt.

[0015] In order to better install the presser foot on the rotating part, preferably, the presser foot has an extension portion extending towards the rear end for connecting the rotating part, and the extension portion has a second through hole extending vertically, so that the presser foot can be fixed to the rotating part in a back-to-back adjustment by setting a second fastener.

[0016] To make the movement and positioning of the mounting base more precise, preferably, the base plate is also provided with an upwardly extending positioning member. The positioning member has a third through hole that runs vertically through it. By setting a third fastener, the positioning member can be fixed to the base plate in a back-and-forth adjustment manner. When the mounting base moves to the set position at the rear end, it can abut against the front end of the positioning member to limit the mounting base from being moved too far back.

[0017] In order to optimize the overall structure of the flipping assembly and enable the flipping assembly to better flip the edge, preferably, the flipping assembly includes flipping rods extending to the left and right, and the third driving component has two sets, with the left and right ends of the flipping rods respectively driven and connected to the driving ends of the corresponding third driving component.

[0018] To ensure smoother and more stable movement of the tilting rod during its forward and backward motion, preferably, the base plate has a guide groove extending forward and backward, and a guide member that can slide forward and backward is provided in the guide groove. The front end and rear end of the guide member are respectively connected to the tilting rod and the third drive member. A strip hole extending forward and backward and penetrating vertically is formed on the guide member. A limiting member adapted to fit in the strip hole is also installed on the base plate to prevent the guide member from disengaging upward from the guide groove.

[0019] In order to better complete the second stitching of the flipped edge, preferably, the base plate is also provided with a template adapted to the rear end of the flipping rod, so that the flipped edge can be kept in a taut state under the mutual compression of the flipping rod and the template.

[0020] In order to make the bottom plate more securely fix the front bag piece to the workbench, preferably, the bottom plate is also provided with a pressure plate. The pressure plate has a plurality of pressure pieces arranged at intervals in the left and right direction and extending down to the bottom of the bottom plate. Each pressure piece extends from the front end to the rear end and gradually tilts downward and is elastic.

[0021] Compared with the prior art, the advantages of this utility model are as follows: The presser foot assembly is movable on the base plate, and the presser foot can be flipped up and down to facilitate pressing the facing fabric onto the front pocket piece. A first drive component, rotatably mounted on the presser foot assembly and moving synchronously with it, drives the presser foot to flip up and down and move back and forth. A flipping component, also movable on the base plate, flips the facing fabric with the first stitch sewn from front to back to facilitate subsequent second stitching. Because both the presser foot assembly for pressing the facing fabric and the flipping component for flipping the facing fabric employ novel driving methods, the overall layout of the flipping device is more compact, and both the presser foot assembly and the flipping component can achieve precise positioning during their back-and-forth movement. This allows both the presser foot assembly and the flipping component to better cooperate with the sewing machine head, ultimately resulting in higher quality double-thread sewing. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0023] Figure 2 This is a schematic diagram of the decomposed state structure of this embodiment;

[0024] Figure 3 This is a schematic diagram of the bottom view structure of this embodiment;

[0025] Figure 4 This is a schematic diagram of the cross-sectional structure A in this embodiment. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1-4 The diagram shows the preferred embodiment of this utility model. The flanging mechanism of the front bag machine in this embodiment mainly includes a base plate 1, a presser foot assembly 2, a material turning assembly 3, a first drive component 4, a second drive component 5, and a third drive component 6.

[0028] refer to Figure 1 and Figure 2As shown, in this embodiment, the base plate 1 is mainly used to fix the front bag piece and has a through hole 11 extending vertically; the presser foot assembly 2 is movably mounted on the base plate 1 and has a presser foot 2a that can be flipped up and down. In the flipped-down state, the presser foot 2a can pass through the through hole 11 to press the facing edge firmly onto the front bag piece; the flipping assembly 3 is movably mounted on the base plate 1 to flip the facing edge with the first stitch already sewn from front to back; the first driving member 4 is rotatably mounted on the presser foot assembly 2 and can move synchronously with the presser foot assembly 2, its driving end being connected to the presser foot 2a to drive the presser foot 2a to flip up and down; the second driving member 5 drives the presser foot assembly 2 to move back and forth; and the third driving member 6 drives the flipping assembly 3 to move back and forth. It should be noted that, for ease of description, Figure 1 The direction indicated by the middle arrow A is defined as forward, and the direction indicated by the arrow B is defined as right.

[0029] In order to optimize the overall structure of the presser foot assembly 2, so that the presser foot assembly 2 can better realize the pressing action and the translational movement, reference is made to... Figure 1 and Figure 2 As shown, in this embodiment, the presser foot assembly 2 further includes a mounting base 2b that can move back and forth relative to the base plate 1. A guide rail assembly 2c is provided between the mounting base 2b and the base plate 1 to facilitate the back and forth movement of the mounting base 2b. The driving end of the second driving member 5 is connected to the mounting base 2b. A first shaft hole 2b1 arranged laterally is formed on the mounting base 2b. A rotating member 2d that can rotate around its own axis is inserted into the first shaft hole 2b1. A hinge portion 2d1 that deviates from the axis is formed on the rotating member 2d. The driving end of the first driving member 4 is hinged to the hinge portion 2d1 to drive the rotating member 2d to rotate. The presser foot 2a is mounted on the rotating member 2d and rotates synchronously with the rotating member 2d.

[0030] Secondly, in order to better form the first shaft hole 2b1 on the mounting base 2b, refer to Figure 2 As shown, in this embodiment, a first connector 2b2 is specially provided at the front end of the mounting base 2b. A first shaft hole 2b1 is formed on the first connector 2b2. A first waist hole 2b3 is provided on the first connector 2b2, which runs vertically through the top and bottom. The first connector 2b2 is fixed on the mounting base 2b by setting a first fastener 2b4 so that it can be adjusted back and forth.

[0031] Meanwhile, in order to allow the first driving component 4 to rotate more effectively, it is mounted on the mounting base 2b, with reference to... Figure 1 and Figure 2 As shown, the rear end of the mounting base 2b is provided with a second connector 2b5, and a transversely extending connecting shaft 2b6 is formed on the second connector 2b5. The side of the first driving member 4 is provided with a second shaft hole 4a that allows the connecting shaft 2b6 to rotate and adapt.

[0032] It should be further explained here that the first connecting member 2b2, the second connecting member 2b5, and the rotating member 2d are all provided in pairs. Please refer to the specific distribution method for details. Figure 1 As shown.

[0033] Furthermore, in order to better mount the pressure foot 2a onto the rotating part 2d, refer to... Figure 2 As shown, in this embodiment, an extension 2a1 is specially formed on the presser foot 2a to extend towards the rear end for connecting the rotating member 2d. The extension 2a1 has a second through hole 2a2 that runs vertically through the body. By setting the second fastener 2a3, the presser foot 2a can be fixed to the rotating member 2d in a back-to-back adjustment manner.

[0034] In addition, to make the movement and positioning of the mounting base more precise, refer to Figure 1 and Figure 2 As shown, in this embodiment, the base plate 1 is also provided with an upwardly extending positioning member 7. The positioning member 7 has a third waist hole 7a that runs vertically through it. By setting a third fastener 7b, the positioning member 7 can be fixed to the base plate 1 in a front-to-back adjustable manner. When the mounting seat 2b moves to the rear end to the set position, it can abut against the front end of the positioning member 7 to limit the mounting seat 2b from being moved too far back. When it is necessary to sew front pocket pieces and facings of different specifications, it is only necessary to adjust the front-to-back position of the positioning member 7 according to the actual size.

[0035] In this embodiment, in order to optimize the overall structure of the flipping component 3 so that the flipping component 3 can better flip the edge, reference is made. Figure 1 and Figure 2 As shown, the material turning assembly 3 includes a turning rod 3a extending to the left and right, and the third driving member 6 has two sets, with the left and right ends of the turning rod 3a respectively driven and connected to the driving ends of the corresponding third driving member 6.

[0036] In this embodiment, to ensure that the tilting rod 3a moves more smoothly and steadily during its forward and backward movement, reference is made to... Figure 2 As shown, a guide groove 1a extending forward and backward is specially formed on the base plate 1, and a guide member 1b that can slide forward and backward is provided in the guide groove 1a. The front end and rear end of the guide member 1b are respectively connected to the flipping rod 3a and the third driving member 6. A strip hole 1b1 extending forward and backward and penetrating vertically is formed on the guide member 1b. A limiting member 1c adapted to the strip hole 1b1 is also installed on the base plate 1 to limit the guide member 1b from moving upward away from the guide groove 1a.

[0037] In this embodiment, in order to better complete the second stitching of the flipped-over edge, refer to Figure 2 and Figure 3 As shown, a template 1d is specially provided on the base plate 1 to fit the rear end of the flipping rod 3a. After the flipping is completed, the edge can be kept in a taut state under the mutual pressure of the flipping rod 3a and the template 1d.

[0038] In this embodiment, in order to make the base plate 1 more firmly fix the front bag piece to the front standby worktable, refer to Figure 3 and 4 As shown, a pressure plate 8 is specially provided on the base plate 1. Multiple pressure plates 8a are formed on the pressure plate 8, which are spaced apart in the left and right direction and extend down to the bottom of the base plate 1. Each pressure plate 8a extends from the front end to the rear end and gradually tilts downward and is elastic.

[0039] It is worth noting that in this embodiment, the presser foot assembly 2 is mounted on the base plate 1 in a way that allows it to move back and forth. The presser foot 2a of the presser foot assembly 2 can be flipped up and down to facilitate pressing the edge fabric onto the front pocket piece. A first drive component 4, which is rotatably mounted on the presser foot assembly 2 and moves synchronously with it, drives the presser foot 2a to flip up and down and move back and forth. A flipping component 3, which moves back and forth on the base plate 1, flips the edge fabric with the first stitch sewn from front to back to facilitate the subsequent second stitch. Because both the presser foot assembly 2 (for pressing the edge fabric) and the flipping component 3 (for flipping the edge fabric) employ novel driving methods, the overall layout of the flipping device is more compact. This allows both the presser foot assembly 2 and the flipping component 3 to achieve precise positioning during their back-and-forth movement, enabling them to better cooperate with the sewing machine head and ultimately achieve higher quality double-thread sewing.

[0040] The specific working process of the flanging mechanism of the front bag machine is as follows:

[0041] Preparation stage: Place the front bag piece to be processed on the base plate 1, and use the pressure plate 8 on the base plate 1 to firmly fix the front bag piece. Multiple pressure plates 8a arranged at intervals in the left and right direction on the pressure plate 8 extend down to the bottom of the base plate 1. Each pressure plate 8a extends from the front end to the rear end and gradually tilts downward. It is also elastic and can fit tightly against the front bag piece to ensure that it will not shift during processing.

[0042] First stitching: The second drive unit 5 is activated, which drives the mounting base 2b of the presser foot assembly 2 to move forward along the guide rail assembly 2c to the designated position. The guide rail assembly 2c ensures the smoothness and accuracy of the movement of the mounting base 2b. After reaching the position, the first drive unit 4 starts working, and its drive end pushes the rotating part 2d to rotate around its own axis. Since the presser foot 2a is mounted on the rotating part 2d and rotates with it, the presser foot 2a will flip downward. After the presser foot 2a passes through the through hole 11 of the base plate 1, it firmly presses the facing edge onto the front pocket piece. At this time, the sewing machine head starts working, completing the first stitching.

[0043] Edge Flipping: After the first seam is sewn, the first drive unit 4 reverses its direction, causing the presser foot 2a to flip upwards back to its initial position. Next, the second drive unit 5 drives the presser foot assembly 2 to move backwards, away from the sewing area. Subsequently, the third drive unit 6 activates, connecting the two drive ends to the left and right ends of the flipping rod 3a, respectively, causing the flipping rod 3a to move forward below the edge. Once in position, the third drive unit 6 drives the flipping rod 3a backwards, flipping the edge with the first seam sewn from front to back. During the movement of the flipping rod 3a, the guide groove 1a and guide member 1b on the base plate 1 play crucial roles. The front end of the guide member 1b connects to the flipping rod 3a, and the rear end connects to the third drive unit 6. The strip hole 1b1 on the guide member 1b engages with the limiting member 1c on the base plate 1, ensuring that the flipping rod 3a can only slide smoothly back and forth along the guide groove 1a without deviation or wobbling, thus guaranteeing the accuracy of the edge flipping.

[0044] The second stitching: After the facing is flipped over, the flipping rod 3a continues to move backward until it presses against the template 1d fitted at its rear end, putting the flipped facing under tension. This tension provides good conditions for the second stitching, ensuring even and flat seams. At this time, the presser foot assembly 2 moves forward again to the appropriate position under the action of the second drive 5, and the first drive 4 drives the presser foot 2a to flip downward, pressing the facing again. The sewing machine head then begins the second stitching, completing the entire front pocket facing process.

[0045] It should be noted that in the description of this embodiment, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A tucking mechanism for a front bagging machine, characterized by: The utility model relates to a sewing machine for sewing the welt of a front bag piece, which comprises a base plate (1) for fixing the front bag piece and having a through hole (11) extending vertically; a presser foot assembly (2) movably arranged on the base plate (1) and having a presser foot (2a) capable of being flipped vertically, the presser foot (2a) being capable of passing through the through hole (11) to press the welt on the front bag piece when flipped downward; a turning assembly (3) movably arranged on the base plate (1) for turning the welt sewn with the first line of stitches from front to back; a first driving member (4) rotatably arranged on the presser foot assembly (2) and capable of moving synchronously with the presser foot assembly (2), the driving end of the first driving member (4) being connected with the presser foot (2a) to drive the presser foot (2a) to flip vertically; a second driving member (5) for driving the presser foot assembly (2) to move forward and backward; and a third driving member (6) for driving the turning assembly (3) to move forward and backward. The presser foot assembly (2) further comprises a mounting base (2b) capable of moving forward and backward relative to the base plate (1), a guide rail assembly (2c) being arranged between the mounting base (2b) and the base plate (1) to facilitate the forward and backward movement of the mounting base (2b), the driving end of the second driving member (5) being connected with the mounting base (2b), a first shaft hole (2b1) extending horizontally being formed on the mounting base (2b), a rotating member (2d) capable of rotating about its own axis being arranged in the first shaft hole (2b1), a hinge part (2d1) deviating from the axis being formed on the rotating member (2d), the driving end of the first driving member (4) being hinged with the hinge part (2d1) to drive the rotating member (2d) to rotate, the presser foot (2a) being mounted on the rotating member (2d) and rotating synchronously with the rotating member (2d). A first connecting member (2b2) is arranged at the front end of the mounting base (2b), the first shaft hole (2b1) being formed on the first connecting member (2b2), a first waist hole (2b3) extending vertically being formed on the first connecting member (2b2), and the first connecting member (2b2) being adjustably fixed on the mounting base (2b) by arranging a first fastener (2b4). A second connecting member (2b5) is arranged at the rear end of the mounting base (2b), a connecting shaft (2b6) extending horizontally being formed on the second connecting member (2b5), and a second shaft hole (4a) being formed on the side of the first driving member (4) to accommodate the rotation of the connecting shaft (2b6). An extension part (2a1) extending toward the rear end of the presser foot (2a) is formed to connect the rotating member (2d), a second waist hole (2a2) extending vertically being formed on the extension part (2a1), and the presser foot (2a) being adjustably fixed on the rotating member (2d) by arranging a second fastener (2a3). A positioning member (7) extending upward is arranged on the base plate (1), a third waist hole (7a) extending vertically being formed on the positioning member (7), the positioning member (7) being adjustably fixed on the base plate (1) by arranging a third fastener (7b), and the mounting base (2b) being capable of abutting against the front end of the positioning member (7) when moved to a set position to limit the over-rearward movement of the mounting base (2b). ​ 2. The turner mechanism of a front bagger according to claim 1, wherein: ​ 3. The flanging mechanism of a front bagger according to claim 2, characterized in that: ​ 4. The flanging mechanism of a front bagger according to claim 2, wherein: ​ 5. The flanging mechanism of a front bagger according to claim 2, wherein: ​ 6. The flanging mechanism of a front bagger according to claim 2, wherein: ​ 7. The tucking mechanism of a front bagging machine according to any one of claims 1 to 6, characterized in that: The turnover assembly (3) comprises left and right extending turnover rods (3a), the third driving members (6) have two groups, and the left and right ends of the turnover rods (3a) are respectively drivingly connected to the driving ends of the corresponding third driving members (6).

8. The flanging mechanism of a front bagger according to claim 7, characterized in that: The bottom plate (1) is provided with front and rear extending guide grooves (1a), the guide grooves (1a) are provided with front and rear sliding guide members (1b), the front and rear ends of the guide members (1b) are respectively connected to the turnover rods (3a) and the third driving members (6), the guide members (1b) are provided with front and rear extending and up and down penetrating strip-shaped holes (1b1), and the bottom plate (1) is further provided with limiting members (1c) which are adapted in the strip-shaped holes (1b1) and used for limiting the guide members (1b) from being separated upward from the guide grooves (1a).

9. The bag-on-front machine's turn-up mechanism according to claim 1, characterized in that: The bottom plate (1) is further provided with a template (1d) which is adapted to the rear end of the turnover rod (3a), and the turned-over and edged material can be in a taut state under the mutual extrusion of the turnover rod (3a) and the template (1d).

10. The bag-on-front machine's turn-up mechanism according to claim 1, characterized in that: The bottom plate (1) is further provided with a pressing plate (8), the pressing plate (8) is provided with a plurality of pressing pieces (8a) which are arranged in the left and right directions and downward penetrate to the bottom of the bottom plate (1), each pressing piece (8a) extends from the front end to the rear end and gradually inclines downward and has elasticity.

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