A left and right material folding assembly and a material folding device for a bag opening machine

Abstract

This utility model discloses a left-right folding component and folding device for a bag opening machine, belonging to the technical field of bag opening machines; a left-right folding component for a bag opening machine; it includes a folding module, which is symmetrically arranged on both sides of the folding opening; the folding module includes a hooking component and a folding component; the hooking component includes a hooking plate, one end of which has a through groove running vertically; the folding component includes a folding plate; the hooking plate is located on the upper side of the folding plate; in the hooking state, the hooking plates on both sides move towards each other, the through groove is exposed on the outside of the folding plate, and the fabric is inserted into the through groove; in the folding state, the folding plates on both sides move towards each other to clamp the triangular part of the fabric, and the hooking plates and folding plates on both sides move away from each other synchronously; it can reduce the impact of vibration on the folded part of the fabric, improve the stability when folding the fabric longitudinally; reduce the length of the fabric to be folded, and can adapt to the processing of smaller bag openings.

Description

Technical Field

[0001] This utility model belongs to the field of bag opening machine technology, and more specifically, relates to a left and right folding component and folding device for a bag opening machine. Background Technology

[0002] A garment pocket opening machine is a device used to automatically cut and open garment pockets; it is widely used in the garment manufacturing industry to improve efficiency and reduce manual operation; it first requires fixing the garment fabric on a large pressure frame and then opening and folding the pockets using laser technology.

[0003] In the prior art, the patent document with application number CN202421765473.6 (publication date April 29, 2025) discloses a pressing device for a garment bag opening machine, which uses a lead screw and linkage seat to drive the corresponding pressing plate or side pressing plate to move on the horizontal plane, so as to perform folding operation on the fabric after laser bag opening; In this scheme, during the folding process, the fabric needs to be passed through the groove opened on the pressure plate. The pressure plate is moved outward, causing the fabric to fold outward along with the pressure plate, thus achieving the folding effect. Because the upper and lower pressure plates need to maintain a sliding relationship, meaning there is a certain gap between them, and the fabric is located between the two pressure plates after folding, it is impossible to completely clamp the folded fabric. This makes it easy for the folded part to fall off and deform due to vibration during fabric movement and sewing. At the same time, since the pressure plate is pressed on the end of the folded fabric when folding, if a Y-shaped opening is used, the folded part on the side will be a triangle, and the pressure plate will press on the tail end of the triangle. This is only suitable for folding fabric with a large opening (because the larger the opening, the larger the width of the tail end of the triangle). It is not suitable for processing fabric with a small opening, otherwise the folded fabric will not be easily pressed down (because the opening is too small, the width of the tail end of the triangle is too small), and it is easy to deform. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a left and right folding component and folding device for a bag opening machine, which can reduce the impact of vibration on the folded edge of the fabric and improve the stability of the fabric when folding it longitudinally; reduce the length of the fabric to be folded, and can adapt to the processing of smaller bag openings.

[0005] This utility model discloses a left and right folding assembly for a bag opening machine, which includes a working cover plate with a folding opening that extends vertically through the cover plate; it also includes folding modules, which are symmetrically arranged on both sides of the folding opening; the folding module includes a hook assembly and a folding assembly; the hook assembly includes a hook plate with a vertical through groove at one end to accommodate the bag edge after opening; the folding assembly includes a folding plate; the hook plate slides against the upper end of the folding plate, and both the hook plate and the folding plate have independent left and right movement capabilities, and the hook plate can at least be completely moved to the underside of the folding plate to clamp the bag edge between the hook plate and the folding plate; In the inserting state, the hook plates on both sides move towards each other, exposing the through groove and placing it inside the folding plate, so that the fabric can be inserted into the through groove; in the clamping state, the folding plates on both sides move towards each other until they are completely below the hook plates, so that the bag edge located in the through groove is abutted and clamped between the hook plates and the folding plates; in the folding state, the hook plates and folding plates on both sides move away from each other at the same time to complete the folding of the bag edge.

[0006] As a further improvement of this utility model, the material hook assembly includes a material hook plate, a first linkage rod, a first lead screw, a first linkage seat, and a first linkage motor; the first linkage motor is located on the rear side of the working cover plate, and a pulley is fixedly connected to the output end of the first linkage motor. A pulley is sleeved on the first lead screw, and the pulleys are connected by belt drive; there are two material hook plates, two first linkage rods, and two first linkage seats, which are symmetrically arranged on both sides of the first lead screw; the first linkage rod is located on the lower side of the first linkage seat and is mounted on the lower cover plate. The two are rotatably connected by a first linkage plate, and the other end of the first linkage rod is rotatably connected to the material hook plate by a bolt; the material hook plate is arranged parallel to the first lead screw.

[0007] As a further improvement of this utility model, a through groove is opened on the hook frame, and the hook frame is fixedly set at the end of the hook plate away from the first linkage rod; the upper side of the hook frame is fixedly connected to the lower side of the hook plate, and the hook frame extends outward along the length direction of the hook plate.

[0008] As a further improvement of this utility model, the first linkage motor drives the first lead screw to rotate through the pulley and belt, thereby causing the first linkage seats on the left and right sides to move towards or in opposite directions; when the two move towards each other, they respectively drive their corresponding hook plates to move closer to each other; when the two move in opposite directions, they respectively drive their corresponding hook plates to move away from each other.

[0009] As a further improvement of this utility model, the folding assembly includes a folding plate, a second linkage rod, a second lead screw, a second linkage seat, and a second linkage motor. The second linkage motor is located on the rear side of the working cover plate, and a pulley is fixedly connected to the output end of the second linkage motor. A pulley is sleeved on the second lead screw, and the pulleys are connected by belt drive. There are two folding plates, two second linkage rods, and two linkage seats, which are symmetrically arranged on both sides of the second lead screw. The second linkage rod is located on the lower side of the second linkage seat, and the two are rotatably connected by a second linkage plate. The other end of the second linkage rod is rotatably connected to the folding plate by a bolt. The folding plate is arranged parallel to the second lead screw.

[0010] As a further improvement of this utility model, the second linkage motor drives the second lead screw to rotate through the pulley and belt, thereby causing the second linkage seats on the left and right sides to move towards or in opposite directions; when the two move towards each other, they respectively drive the corresponding folding plates to move closer to each other; when the two move in opposite directions, they respectively drive the corresponding folding plates to move away from each other.

[0011] As a further improvement of this utility model, the working cover plate includes an upper cover plate and a lower cover plate, with the upper cover plate fixedly installed on the upper side of the lower cover plate; the upper cover plate and the lower cover plate have a through-hole folding opening on their front sides.

[0012] A folding device for a bag opening machine includes a front and rear folding assembly and a left and right folding assembly for the bag opening machine; the part of the front and rear folding assembly used for folding is the strip-shaped part of the front and rear sides of the fabric, and the front and rear folding assembly includes front and rear hook plates; the front and rear hook plates and the hook plates are located at different heights so that the movement paths of the front and rear hook plates do not interfere with the movement paths of the hook plates.

[0013] As a further improvement of this utility model, the front and rear folding assembly also includes front and rear folding plates; front and rear hook plates are disposed on the lower side of the front and rear folding plates; front and rear hook grooves that run vertically through the front and rear hook plates are provided to accommodate the bag edge of the fold; both the front and rear hook plates and the front and rear folding plates have the ability to move independently horizontally in the front and rear; the two hook modules of the left and right folding assembly are respectively located on the left and right sides of the front and rear hook plates; in the inserting state, the front and rear hook plates move horizontally in the front and rear direction, and the limit position of the opposite movement of the hook plates is located outside the movement path of the front and rear hook plates; in the hooking state, the hook plates and folding plates move away from the front and rear hook plates.

[0014] As a further improvement of this utility model, the hook plate and the front and rear folding plates are at the same height; the folding plate and the front and rear hook plates are at the same height.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting up a folding component and a hook component, the hook plate is positioned below the folding plate, relative to the existing hook plate. By setting the hook plate above the folding plate, the hook plate only needs to hook a portion of the triangle to perform the folding, which can reduce the impact of vibration on the folded part of the fabric and improve the stability of the fabric when folding it longitudinally. It also reduces the length of the fabric that needs to be folded, making it suitable for processing smaller bag openings.

[0016] 2. The movement paths of the horizontal folding component, hooking component, and folding component do not overlap. The working stroke of the vertical folding is shorter. The movement paths will not interfere when folding the bag opening. Horizontal and vertical folding can be performed simultaneously and independently. Compared with the existing folding process, there is no need to wait for the vertical folding to be completed before performing the horizontal folding, resulting in higher folding efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the folding device of this utility model; Figure 2 This is a schematic diagram of the longitudinal folding edge assembly of this utility model; Figure 3 This is a structural schematic diagram of the hook assembly and the folding assembly of this utility model; Figure 4 This is a schematic diagram of the working state of this utility model during the folding process; Figure 5 This is a schematic diagram of another working state during the folding process of this utility model; Figure 6 This is a schematic diagram of the overall structure of the transverse folding edge assembly according to a specific embodiment two of this utility model; Figure 7 This is a schematic diagram of the lower side of the transverse folding edge assembly of this utility model; Figure 8 This is an exploded view of the rear hook frame, rear folding frame, and rear mounting bracket of this utility model. Figure 9 This is a schematic diagram of the structure of the transverse hook assembly of this utility model; Figure 10 This is a schematic diagram of the structure of the transverse folding edge assembly of this utility model; Figure 11 This is a schematic diagram of the structure of the rear mounting bracket of this utility model; Figure 12 This is a schematic diagram of the front mounting bracket of this utility model; Figure 13 This is a schematic diagram of the structure of the lower cover plate of this utility model; Figure 14 This is a schematic diagram of the operation in its initial state. Figure 15 This is a schematic diagram of the operation in the inserting state; Figure 16 This is a schematic diagram of the working state of the material in the folded edge state.

[0018] Explanation of the labels in the diagram: Working cover 1, upper cover 11, lower cover 12; Longitudinal folding component a; Material hook assembly 2, material hook plate 21, material hook frame 211, first linkage rod 22, first lead screw 23, first linkage seat 24, first linkage motor 25; Folding assembly 3, folding plate 31, second linkage rod 32, second lead screw 33, second linkage seat 34, second linkage motor 35; Lateral folding component b; Horizontal hook assembly 4, rear hook frame 41, front hook frame 42, horizontal hook motor 43, horizontal hook screw 44, rear hook plate 45, rear hook trough 451, front hook plate 46, front hook trough 461. 5. Horizontal folding component, 51. Rear folding frame, 52. Front folding frame, 53. Horizontal folding motor, 54. Horizontal folding lead screw, 55. Rear folding plate, 56. Front folding plate; Rear mounting bracket 6, rear upper frame 61, rear lower frame 62, rear folded edge groove 63, rear mounting frame 64; Front mounting bracket 7, front upper frame 71, front lower frame 72, front folded edge groove 73, front mounting frame 74. Detailed Implementation

[0019] Specific Implementation Example 1: Please refer to Figures 2-5 A left-right folding assembly for a bag opening machine is disclosed. In this embodiment, it is a longitudinal folding assembly a, which includes a working cover plate 1, a hooking assembly 4, and a folding edge assembly 5. In this embodiment, the longitudinal direction is the left-right direction of the working cover plate 1, and the transverse direction is the front-back direction of the working cover plate 1; the part of the longitudinal folding assembly a used for folding the material is the triangular part on the left and right sides of the fabric.

[0020] The working cover plate 1 includes an upper cover plate 11 and a lower cover plate 12, with the upper cover plate 11 fixedly mounted on the upper side of the lower cover plate 12. The upper cover plate 11 and the lower cover plate 12 have through-hole folding openings on their front sides. In this embodiment, the fabric is placed on the upper side of the folding opening of the working cover plate 1, with the lower side of the fabric fitting against the upper side of the working cover plate 1, completely covering the folding opening. It should be noted that in this embodiment, the upper side of the working cover plate 1 has a pressing frame mechanism, which presses the fabric downwards onto the surface of the working cover plate 1. Simultaneously, a laser-cut slit with "Y"-shaped ends is cut into the fabric surface by a laser-cutting mechanism. Specifically, the upper side of the working cover plate 1 also has a cutting mechanism for pressing the triangular portions of the left and right sides of the fabric downwards. The upper side of the working cover plate 1 has a three-axis moving mechanism, which connects the working cover plate 1 to allow for free movement. The frame pressing mechanism, three-axis moving mechanism, inserting knife mechanism and laser bag opening mechanism in this embodiment are all conventional technical means in the field and are not the core of this application. Their specific connection relationship and working principle will not be described here.

[0021] The material hook assembly 2 includes a material hook plate 21, a first linkage rod 22, a first lead screw 23, a first linkage seat 24, and a first linkage motor 25. The first linkage motor 25 is located on the rear side of the working cover plate 1, on the right side of the working cover plate 1. A pulley is fixedly connected to the output end of the first linkage motor 25. A pulley is sleeved on the first lead screw 23, and the pulleys are connected by a belt drive (not shown in the figure) to drive the first lead screw 23 to rotate around its axis. There are two of each of the material hook plate 21, the first linkage rod 22, and the first linkage seat 24, which are symmetrically arranged on both sides of the first lead screw 23.

[0022] The first linkage rod 22 is located on the lower side of the first linkage seat 24 and is mounted on the lower cover plate 12. The two are rotatably connected by the first linkage plate (not shown in the figure). The other end of the first linkage rod 22 is rotatably connected to the hook plate 21 by a bolt, so as to drive the hook plate 21 to move horizontally. The hook plate 21 is arranged parallel to the first lead screw 23, and the end of the hook plate 21 away from the first linkage rod 22 has a through groove running vertically through it.

[0023] Preferably, the through groove is formed on the hook frame 211, and the hook frame 211 is fixedly set at the end of the hook plate 21 away from the first linkage rod 22. Specifically, the upper side of the hook frame 211 is fixedly connected to the lower side of the hook plate 21, and the hook frame 211 extends outward along the length direction of the hook plate 21.

[0024] Specifically, the first linkage motor 25 drives the first lead screw 23 to rotate through the pulley and belt, causing the first linkage seats 24 on the left and right sides to move towards or in opposite directions; when they move towards each other, they respectively drive their corresponding hook plates 21 to move closer to each other; when they move in opposite directions, they respectively drive their corresponding hook plates 21 to move away from each other.

[0025] The folding assembly 3 includes a folding plate 31, a second linkage rod 32, a second lead screw 33, a second linkage seat 34, and a second linkage motor 35. The second linkage motor 35 is located on the rear side of the working cover plate 1 and on the left side of the working cover plate 1. A pulley is fixedly connected to the output end of the second linkage motor 35. A pulley is fitted onto the second lead screw 33, and the pulleys are connected by a belt drive (not shown in the figure) to drive the second lead screw 33 to rotate around its axis. The second lead screw 33 is located behind the first lead screw 23, and the first and second lead screws 23 are arranged parallel to each other. There are two folding plates 31, two second linkage rods 32, and two linkage seats 34, symmetrically arranged on both sides of the second lead screw 33.

[0026] The second linkage rod 32 is located on the lower side of the second linkage seat 34, and the two are rotatably connected by the second linkage plate (not shown in the figure). The other end of the second linkage rod 32 is rotatably connected to the folding plate 31 by a bolt, so as to drive the folding plate 31 to move horizontally. The second linkage rod 32 is located outside the first linkage rod 22. The folding plate 31 is arranged parallel to the second lead screw 33. The folding plate 31 is located on the lower side of the hook plate 21, and the upper side of the folding plate 31 is in contact with the lower side of the hook plate 21.

[0027] Specifically, the second linkage motor 35 drives the second lead screw 33 to rotate via a pulley and belt, causing the second linkage seats 34 on the left and right sides to move towards or in opposite directions; when they move towards each other, they respectively drive the corresponding folding plates 31 to move closer to each other; when they move in opposite directions, they respectively drive the corresponding folding plates 31 to move further away from each other.

[0028] In this embodiment, the actuating end of the longitudinal hooking component a is the hooking plate 21 and the folding plate 31. It should be noted that in this embodiment, the lead screw drives the linkage seat, and the linkage seat then drives the linkage plate, which is a conventional existing technology. The specific connection relationship and working principle will not be described here.

[0029] like Figure 5 As shown, in the hooked state (fabric not shown), the hook plate 21 and the folding plate 31 intersect, and the through groove of the hook plate 21 is exposed inside the folding plate 31. The inserting mechanism inserts the triangular part of the fabric into the through groove; as shown Figure 4As shown, in the folded state, the folding plate 31 first moves inward (towards the through groove side), and the fabric is clamped between the hook plate 21 and the folding plate 31. After the fabric is clamped, the hook plate 21 and the folding plate 31 move outward (away from the through groove side) simultaneously to fold the fabric.

[0030] Working principle: Fabric with a "Y"-shaped slit cut by a laser mechanism is pressed tightly onto the working cover plate 1, creating triangular pieces of fabric on both sides of the slit. The slit is located between the hook plates 21 on the left and right sides. First, the hook plates 21 and the folding plate 31 intersect, with the through groove of the hook plate 21 exposed inside the folding plate 31. The inserting mechanism pushes the triangular portion of the fabric into the through groove. Then, the folding plate 31 moves inward (towards the through groove), clamping the fabric between the hook plates 21 and the folding plate 31. After the fabric is clamped, the hook plate 21 and the folding plate 31 move outward (away from the through groove) simultaneously to fold the fabric. The hook plate 21 is set on the upper side of the folding plate 31. The hook plate 21 only needs to hook part of the triangle to fold the edge. At the same time, the left and right sides of the fabric leave the gap required for sewing, which can reduce the impact of vibration on the folded part of the fabric and improve the stability of the fabric when folding it longitudinally. It also reduces the length of the fabric to be folded, which can adapt to the processing of smaller bag openings.

[0031] Specific Implementation Example 2: Please refer to Figure 1 , Figures 6-16 A folding device for a bag opening machine is similar to that in Specific Embodiment 1, and will not be repeated here. The difference is that it also includes front and rear folding components. In this embodiment, the front and rear folding components are horizontal folding components b, and the part of the horizontal folding components b used for folding is the strip part of the front and rear sides of the fabric.

[0032] The transverse folding assembly b includes a transverse hooking assembly 4 and a transverse folding assembly 5. The transverse hooking assembly 4 includes a rear hooking frame 41, a front hooking frame 42, a transverse hooking motor 43, and a transverse hooking screw 44.

[0033] The transverse hooking motor 43 is fixedly installed on the rear side of the working cover plate 1, and one end of the transverse hooking screw 44 is connected to the output end of the transverse hooking motor 43.

[0034] The rear hook frame 41 and the front hook frame 42 are slidably disposed in front of the transverse hook motor 43, with the front hook frame 42 surrounding the outer side of the rear hook frame 41. A rear hook plate 45 is fixedly disposed on the front side (the side away from the hook motor 43) of the rear hook frame 41, and a vertically penetrating rear hook groove 451 is provided on the side of the rear hook plate 45. A rear hook linkage seat is fixedly disposed on the rear side (the side closer to the hook motor 43) of the rear hook frame 41, and the rear hook linkage seat is threadedly connected to the transverse hook screw 44 to drive the rear hook frame 41 to move back and forth.

[0035] A front hook plate 46 is fixedly installed on the front side of the front hook frame 42 (the side away from the hook motor 43). The front hook plate 46 and the rear hook plate 45 are arranged facing each other and are located on the same horizontal plane, with a gap between them. A front hook groove 461 that runs vertically through the side of the front hook plate 46 is provided. A front hook linkage seat is fixedly installed on the rear side of the front hook frame 42 (the side closer to the hook motor 43). The front hook linkage seat is threadedly connected to the transverse hook screw 44 to drive the front hook frame 42 to move back and forth.

[0036] The transverse hooking motor 43 drives the transverse hooking screw 44 to rotate, causing the front hooking linkage seat and the rear hooking linkage seat to move towards or in opposite directions. When they move towards each other, the rear hooking linkage seat causes the rear hooking frame 41 to move forward, and the front hooking linkage seat causes the front hooking frame 42 to move backward, so that the front hooking plate 42 and the rear hooking plate 41 move closer to each other. When they move in opposite directions, the rear hooking linkage seat causes the rear hooking frame 41 to move backward, and the front hooking linkage seat causes the front hooking frame 42 to move forward, so that the front hooking plate 42 and the rear hooking plate 41 move further apart from each other.

[0037] The transverse folding assembly 5 includes a rear folding frame 51, a front folding frame 52, a transverse folding motor 53, and a transverse folding lead screw 54. The transverse folding motor 53 is fixedly mounted on the rear side of the working cover plate 1 and is located to the left of the transverse material hooking motor 43. One end of the transverse folding lead screw 54 is connected to the output end of the transverse folding motor 53. The front folding frame 52 and the rear folding frame 51 are slidably mounted on the front side of the transverse folding motor 53, with the front folding frame 52 surrounding the outer side of the rear folding frame 51.

[0038] The rear folding frame 51 is located on the upper side of the rear hook frame 41. A rear folding plate 55 is fixedly installed on the front side of the rear folding frame 51 (the side away from the transverse folding motor 53), and the rear folding plate 55 is located on the upper side of the rear hook plate 45. A rear folding linkage seat is fixedly installed on the rear side of the rear folding frame 51 (the side closer to the transverse folding motor 53), and the rear folding linkage seat is threadedly connected to the transverse folding screw 54 to drive the rear folding frame 51 to move back and forth.

[0039] The front folding frame 52 is located on the upper side of the front hook frame 42. A front folding plate 56 is fixedly installed on the front side of the front folding frame 52 (the side away from the transverse folding motor 53), and the front folding plate 56 is located on the upper side of the front hook plate 56. The rear folding plate 55 and the front folding plate 56 are located on the same horizontal plane and are spaced apart from each other. A front folding linkage seat is fixedly installed on the rear side of the front folding frame 52 (the side closer to the transverse folding motor 53), and the front folding linkage seat is threadedly connected to the folding screw 54 to drive the front folding frame 56 to move back and forth.

[0040] The transverse folding motor 53 drives the transverse folding screw 54 to rotate, causing the front folding linkage seat and the rear folding linkage seat to move towards or in opposite directions. When they move towards each other, the rear folding linkage seat causes the rear folding frame 51 to move forward, and the front folding linkage seat causes the front folding frame 52 to move backward, so that the rear folding plate 55 and the front folding plate 56 move closer to each other. When they move in opposite directions, the rear folding linkage seat causes the rear folding frame 51 to move backward, and the front folding linkage seat causes the front folding frame 52 to move forward, so that the rear folding plate 55 and the front folding plate 56 move further apart from each other.

[0041] The rear hook frame 41, front hook frame 42, rear folding frame 51, and front folding frame 52 each have several through holes on their left and right sides, with the same number of through holes on each side. The rear hook frame 41, front hook frame 42, rear folding frame 51, and front folding frame 52 are all located on the upper side of the working cover plate 1. Several bolts are fixedly installed on the working cover plate 1, and the through holes pass through the corresponding bolts, with the through holes slidably connected to the bolts. In this embodiment, the actuating ends of the transverse hook assembly 4 are the rear hook plate 45 and the front hook plate 46. The actuating ends of the transverse folding assembly 5 are the rear folding plate 55 and the front folding plate 56.

[0042] The mounting bracket is mounted on the working cover plate 1 and includes a front mounting bracket 7 and a rear mounting bracket 6. The front mounting bracket 7 and the rear mounting bracket 6 are fixedly mounted on the folding opening of the working cover plate 1, respectively. The rear mounting bracket 6 is located on one side of the rear folding plate 55, and the front mounting bracket 7 is located on one side of the front folding plate 56. The hook plate 21 and the folding plate 31 are both located on the outside of the front upper frame 51 and the rear upper frame 61. The movement path of the transverse folding component b and the movement path of the longitudinal folding component a do not intersect.

[0043] The rear mounting bracket 6 includes an upper rear frame 61, a lower rear frame 62, and a rear mounting frame 64. The upper rear frame 61 and the lower rear frame 62 are fixedly connected vertically, and a through rear folding groove 63 is formed between them. The rear folding plate 55 matches the length of the rear folding groove 63, and the rear folding plate 55 is slidably connected to the rear folding groove 63, abutting against the inner sidewall of the rear folding groove 63. The rear hook plate 45 abuts against the lower side of the lower rear frame 62 of the rear mounting bracket 6. A rear mounting frame 64 is provided on each of the left and right sides of the rear mounting bracket 6, and the rear mounting frame 64 is detachably connected to the upper cover plate 61 by bolts.

[0044] The front mounting bracket 7 includes an upper front bracket 71, a lower front bracket 72, and a front mounting frame 74. The upper front bracket 71 and the lower front bracket 72 are fixedly connected vertically, and a through front folding groove 73 is formed between them. The front folding plate 55 matches the length of the front folding groove 73, and the front folding plate 55 is slidably connected to the front folding groove 73, abutting against the inner sidewall of the front folding groove 73. The front hook plate 45 abuts against the lower side of the lower front bracket 72 of the front mounting bracket 7. A front mounting frame 74 is provided on each of the left and right sides of the front mounting bracket 7, and the front mounting frame 74 is detachably connected to the upper cover plate 71 by bolts.

[0045] The fabric with a “Y” shaped slit cut by the laser mechanism is pressed onto the working cover plate 1. The slit is located between the hook plates 21 on the left and right sides. Triangular fabric is generated on the left and right sides of the slit, and long strip fabric is generated on the front and back sides of the slit. In the inserting state, both the front hook plate 46 and the rear hook plate 45 move inward (closer to each other) to fully expose the front hook groove 461 and the rear hook groove 451. The inserting mechanism inserts the strip-shaped part of the fabric into the front hook groove 461 and the rear hook groove 451 respectively. The hook plates 21 on both sides move towards each other, and the hook plates 21 intersect with the folding plate 31. The through groove of the hook plate 21 is exposed on the outside of the folding plate 31. The inserting mechanism inserts the triangular part of the fabric into the through groove. The ends of the protruding hook plates 21 are located on the left and right sides of the front hook plate 46 and the rear hook plate 45 respectively. The hook plate 21 and the folding plate 31 are clamped together. The folding plates 31 on both sides move towards each other until they are completely under the hook plate 21, so that the bag edge located in the through groove is abutted and clamped between the hook plate 21 and the folding plate 31. At the same time, the front hook plate 46 and the rear hook plate 45 move outward (away from each other) and retract back to the inside of the mounting frame. The fabric is hooked into the groove and pressed between the lower side of the mounting frame and the front and rear hook plates. At this time, the front and rear parts of the fabric are hooked and folded. In the folded state, the hook plates 21 and folding plates 31 on both sides move away from each other to complete the folding of the bag edge, while leaving gaps for sewing on the left and right sides of the fabric. It should be noted that the left and right folding process can be completed during the movement of the work cover plate to improve work efficiency. At this time, the left and right sides of the fabric are completely clamped and will not slide due to the movement of the work cover plate. In the sewing state, the front folding plate 55 and the rear folding plate 45 move outward (away from each other) and back into the mounting frame to make room for fabric sewing. This process can also be completed during the movement of the work cover plate switching position.

[0046] It should be noted that in this embodiment, the movement paths of the transverse folding component b and the longitudinal folding component a do not intersect. For the long strip and triangular parts of the bag opening, the transverse and longitudinal folding can be performed simultaneously and independently. When folding the bag opening, their movement paths will not interfere with each other. Compared with the existing folding process, it is not necessary to wait for the longitudinal folding to be completed before performing the transverse folding, resulting in higher folding efficiency.

Claims

1. A left and right material folding assembly for a bag opening machine, comprising a working cover plate (1), a material folding opening being formed through the working cover plate (1) from top to bottom; characterized in that: The folding module is symmetrically arranged on both sides of the folding opening. The folding module includes a hook assembly (2) and a folding assembly (3). The hook assembly (2) includes a hook plate (21), and a through groove is provided on one end of the hook plate (21) to accommodate the bag edge after opening. The folding assembly (3) includes a folding plate (31). The hook plate (21) slides against the upper end of the folding plate (31). Both the hook plate (21) and the folding plate (31) have independent left and right movement capabilities, and the hook plate (21) can at least be completely moved to the underside of the folding plate (31) to clamp the bag edge between the hook plate (21) and the folding plate (31). In the inserting state, the hook plates (21) on both sides move towards each other, exposing the through groove and placing it inside the folding plate (31) so that the fabric can be inserted into the through groove; in the clamping state, the folding plates (31) on both sides move towards each other until they are completely below the hook plates (21), so that the bag edge located in the through groove is abutted and clamped between the hook plates (21) and the folding plate (31); in the folding state, the hook plates (21) and the folding plate (31) on both sides move away from each other at the same time to complete the folding of the bag edge.

2. The left and right folding assembly for a bag opener according to claim 1, characterized in that: The material hook assembly (2) includes a material hook plate (21), a first linkage rod (22), a first lead screw (23), a first linkage seat (24), and a first linkage motor (25). The first linkage motor (25) is located on the rear side of the working cover plate (1). A pulley is fixedly connected to the output end of the first linkage motor (25). A pulley is sleeved on the first lead screw (23). The pulleys are connected by belt drive. There are two of each of the material hook plate (21), the first linkage rod (22), and the first linkage seat (24), which are symmetrically arranged on both sides of the first lead screw (23). The first linkage rod (22) is located on the lower side of the first linkage seat (24). The first linkage rod (22) is installed on the lower cover plate (12). The two are rotatably connected by the first linkage plate. The other end of the first linkage rod (22) is rotatably connected to the material hook plate (21) by a bolt. The material hook plate (21) is arranged parallel to the first lead screw (23).

3. The left and right folding assembly of claim 2, wherein: The through slot is opened on the hook frame (211), and the hook frame (211) is fixedly set at the end of the hook plate (21) away from the first linkage rod (22); the upper side of the hook frame (211) is fixedly connected to the lower side of the hook plate (21), and the hook frame (211) extends outward along the length direction of the hook plate (21).

4. The left and right folding assembly of claim 2, wherein: The first linkage motor (25) drives the first lead screw (23) to rotate through the pulley and belt, causing the first linkage seats (24) on the left and right sides to move towards each other or in the opposite direction. When the two move towards each other, they respectively drive the corresponding hook plates (21) to move closer to each other. When the two move in the opposite direction, they respectively drive the corresponding hook plates (21) to move further away from each other.

5. The left and right folding assembly for a bag opener according to claim 1, wherein: The folding assembly (3) includes a folding plate (31), a second linkage rod (32), a second lead screw (33), a second linkage seat (34), and a second linkage motor (35). The second linkage motor (35) is located on the rear side of the working cover plate (1). A pulley is fixedly connected to the output end of the second linkage motor (35). A pulley is sleeved on the second lead screw (33). The pulleys are connected by belt drive. There are two folding plates (31), two second linkage rods (32), and two linkage seats (34), which are symmetrically arranged on both sides of the second lead screw (33). The second linkage rod (32) is located on the lower side of the second linkage seat (34). The two are rotatably connected by a second linkage plate. The other end of the second linkage rod (32) is rotatably connected to the folding plate (31) by a bolt. The folding plate (31) and the second lead screw (33) are arranged parallel to each other.

6. A left and right folding assembly for a bag opener as defined in claim 5, characterized in that: The second linkage motor (35) drives the second lead screw (33) to rotate through the pulley and belt, causing the second linkage seats (34) on the left and right sides to move towards each other or in the opposite direction. When the two move towards each other, they respectively drive the corresponding folding plates (31) to move closer to each other. When the two move in the opposite direction, they respectively drive the corresponding folding plates (31) to move further away from each other.

7. A left and right folding assembly for a bag opener as defined in claim 6, characterized in that: The working cover plate (1) includes an upper cover plate (11) and a lower cover plate (12). The upper cover plate (11) is fixedly installed on the upper side of the lower cover plate (12). The upper cover plate (11) and the lower cover plate (12) have a through-hole opening on the front side.

8. A material folding device for a bag opening machine, characterized by: It includes a front and rear folding assembly and a left and right folding assembly for any of the bag opening machines according to claims 1 to 7; the part of the front and rear folding assembly used for folding is the strip part of the front and rear sides of the fabric, and the front and rear folding assembly includes front and rear hook plates; the front and rear hook plates and the hook plate (21) are located at different heights so that the movement path of the front and rear hook plates does not interfere with the movement path of the hook plate (21).

9. A folding device for a bag opener according to claim 8, characterized in that: The front and rear folding assembly also includes front and rear folding plates; front and rear hook plates are set on the lower side of the front and rear folding plates; front and rear hook grooves that run vertically through the front and rear hook plates are provided to accommodate the bag edge of the folded edge; both the front and rear hook plates and the front and rear folding plates have the ability to move independently horizontally in the front and rear; the two hook modules of the left and right folding assembly are located on the left and right sides of the front and rear hook plates respectively; in the inserting state, the front and rear hook plates move horizontally in the front and rear direction, and the limit position of the opposite movement of the hook plates (21) is located outside the movement path of the front and rear hook plates; in the hooking state, the hook plates (21) and the folding plates (31) move away from the front and rear hook plates.

10. A folding device for a bag opener according to claim 9, characterized in that: The hook plate (21) is at the same height as the front and rear folding plates; the folding plate (31) is at the same height as the front and rear hook plates.

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