Bag folding mechanism for a bag opening machine

Abstract

This utility model discloses a bag-folding mechanism for a bag-opening machine, including a worktable with a positioning window. An upper folding knife assembly and a lower folding knife assembly are correspondingly arranged above and below the positioning window. The upper folding knife assembly includes a lifting and lowering fixed plate, upper left and upper right folding knives mounted on the fixed plate, and front and rear folding knives arranged horizontally. The lower folding knife assembly includes a lifting and lowering mounting plate and lower left and lower right folding knives arranged horizontally on the mounting plate. The upper folding knife assembly descends into the cut bag opening. The front and rear folding knives move back and forth to fold the front and rear edges of the bag opening. The upper left and upper right folding knives descend synchronously with the fixed plate to fold the left and right edges of the bag opening downwards. Then, the lower left and lower right folding knives of the lower folding knife assembly move horizontally left and right to further fold the downward-folded left and right edges and press and shape the folded edges, ensuring the quality of subsequent bag opening sewing.

Description

Technical Field

[0001] This utility model relates to the technical field of bag opening machine accessory structure, and in particular to a bag folding mechanism for a bag opening machine. Background Technology

[0002] In garment manufacturing, opening pockets is an essential step, primarily used to create pockets in specific locations on clothing for carrying small items such as mobile phones and wallets. The process involves first separately processing the pocket opening and the pocket lip, then sewing the lip onto the opening to complete the opening. The processing of the pocket opening requires cutting, folding, shaping the lip, and sewing. Cutting involves creating an "H" or "Y" shaped slit at the pocket opening; folding involves folding the cut opening inwards to form a folded edge; shaping the lip involves placing the lip on the folded edge; and finally, sewing. For example, patent application CN202010348853.X discloses a pocket-opening machine for garment pocket processing; and patent application CN202011214831.0 discloses a continuous production garment pocket-opening machine.

[0003] However, the left and right folds of the "Y"-shaped slit bag opening on the market are mainly achieved by driving the upper folding knife to move laterally to fold the left and right edges of the bag opening. Since the bag opening fabric itself has a certain degree of elasticity, and the folding knife is retracting during the retraction process, it is easy to pull out part of the folded edge of the bag opening, which will affect the subsequent bag opening sewing process. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a bag folding mechanism for a bag opening machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A bag-folding mechanism for a bag-opening machine includes a worktable with a positioning window. An upper folding knife assembly and a lower folding knife assembly are arranged correspondingly above and below the positioning window. The upper folding knife assembly includes a fixed plate that is raised and lowered, an upper left folding knife and an upper right folding knife mounted on the fixed plate, and a front folding knife and a rear folding knife that are moved horizontally. The lower folding knife assembly includes a mounting plate that is raised and lowered, and a lower left folding knife and a lower right folding knife that are moved horizontally on the mounting plate.

[0007] Preferably, the fixed plate is provided with a translation cylinder for driving the upper left and upper right folding blades to move horizontally.

[0008] Preferably, the fixed plate is equipped with a lifting cylinder for driving the upper left and upper right folding blades to rise and fall.

[0009] Preferably, the upper left and upper right folding blades are positioned above the front and rear folding blades.

[0010] Preferably, a bag-folding seat is provided on the crossbeam of the workbench, and a motor on the bag-folding seat is connected to a fixed plate via a lead screw.

[0011] Preferably, the mounting plate is provided with a sliding plate that slides relative to each other, and the lower left folding blade and the lower right folding blade are respectively mounted on the two sliding plates.

[0012] Preferably, the mounting plate is provided with a motor three, the gear of the motor three meshing with a rack and connected to the slide plate through the rack.

[0013] Preferably, the lower folding blade assembly includes a fixed base and a second motor disposed on the fixed base, the second motor being connected to the mounting plate via a second lead screw.

[0014] Preferably, the workbench is provided with a material positioning component, which includes an outer pressure frame and an inner pressure frame arranged opposite to each other, and the outer pressure frame and the inner pressure frame are provided with processing windows corresponding to the positioning window.

[0015] The beneficial effects of this utility model are:

[0016] The upper folding blade assembly descends into the cut bag opening. The front and rear folding blades move back and forth to fold the front and rear edges of the bag opening. The upper left and upper right folding blades descend synchronously with the fixing plate to fold the left and right edges of the bag opening downwards. Then, the lower left and lower right folding blades of the lower folding blade assembly move laterally to further fold the downward-folded left and right edges and press and shape them, so that the left and right edges can be folded and shaped to fit the bag opening. Then, the upper left and upper right folding blades and the lower left and lower right folding blades fold the left and right edges of the bag opening in two stages to prevent the left and right edges of the bag opening from springing back when the blades are withdrawn, thus ensuring the quality of the subsequent sewing of the bag opening. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is an exploded view of the present invention;

[0019] Figure 3 This is a schematic diagram of the material feeding assembly of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the upper folding blade assembly and the lower folding blade assembly of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the lower folding blade assembly of this utility model;

[0022] Figure 6 This is a schematic diagram of the upper folding blade assembly of this utility model;

[0023] Figure 7 This is a schematic diagram showing the combination of the upper right folding blade and the lower right folding blade of this utility model.

[0024] In the diagram: Upper folding knife assembly 1, folding bag holder 11, motor 12, lead screw 121, fixing plate 13, front folding knife 14, rear folding knife 15, upper left folding knife 16, upper right folding knife 17, translation cylinder 18, lifting cylinder 19, lower folding knife assembly 2, fixing seat 21, motor 22, lead screw 221, mounting plate 23, motor 3 24, gear 241, rack 25, sliding plate 26, lower left folding knife 27, lower right folding knife 28, worktable 3, positioning window 31, crossbeam 32, material fixing assembly 4, outer pressure frame 41, inner pressure frame 42, processing window 43. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0026] In the description of this specification, the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit 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.

[0027] Example 1:

[0028] like Figures 1 to 7 As shown, this embodiment discloses a bag-folding mechanism for a bag-opening machine, including a worktable 3. The worktable 3 has a positioning window 31 and a material-fixing component 4. The material-fixing component 4 includes an outer pressure frame 41 and an inner pressure frame 42 arranged opposite to each other. The outer pressure frame 41 is used to place the bag opening to be processed. The inner pressure frame 42 is driven to press against the outer pressure frame 41 and press the bag opening to be processed on the outer pressure frame 41. The outer pressure frame 41 and the inner pressure frame 42 have processing windows 43 corresponding to the positioning window 31, so as to cut the bag opening and perform other processing through the processing window 43 to cut a "Y"-shaped slit in the bag opening. For details, please refer to the invention patent with application number 202110846662.0: A bag-opening machine and processing technology for secondary sewing of a pocket.

[0029] The positioning window 31 is provided with an upper folding knife assembly 1 and a lower folding knife assembly 2 correspondingly above and below. The crossbeam 32 of the workbench 3 is provided with a folding bag seat 11. The upper folding knife assembly 1 is fixed on the folding bag seat 11. The lower folding knife assembly 2 includes a fixing seat 21, which is fixed below the workbench 3.

[0030] Specifically, the upper folding knife assembly 1 includes a fixed plate 13 that is raised and lowered, an upper left folding knife 16 and an upper right folding knife 17 disposed on the fixed plate 13, and a front folding knife 14 and a rear folding knife 15 that are laterally disposed. The upper left folding knife 16 and the upper right folding knife 17 are arranged opposite each other from left to right, and the front folding knife 14 and the rear folding knife 15 are arranged opposite each other from front to back. The lateral disposal can be a lateral displacement cylinder 18, which drives the front folding knife 14 and the rear folding knife 15 to laterally move forward and backward respectively to fold the front and rear edges of the bag opening.

[0031] The motor 12 on the folding bag holder 11 is connected to the fixing plate 13 through the lead screw 121. The motor 12 is fixedly installed on the folding bag holder 11. The motor 12 drives the fixing plate 13 to move up and down through the lead screw 121, and drives the front folding blade 14, the rear folding blade 15, the upper left folding blade 16, and the upper right folding blade 17 to move up and down synchronously.

[0032] When the upper folding blade assembly 1 descends into the cut bag opening, the translation cylinder 18 drives the front folding blade 14 and the rear folding blade 15 to move back and forth. That is, one translation cylinder 18 drives the front folding blade 14 to move forward and the other translation cylinder 18 drives the rear folding blade 15 to move backward, so as to fold the front and rear edges of the bag opening.

[0033] Furthermore, the upper left folding blade 16 and the upper right folding blade 17 descend synchronously with the fixing plate 13, so as to use the downward displacement of the upper left folding blade 16 and the upper right folding blade 17 to fold the left and right edges of the bag opening downward. However, when folding the left and right edges of the "Y"-shaped slit bag opening, the left and right edges are prone to spring back due to the elasticity of the bag opening fabric itself, that is, the left and right edges are more prone to spring back when folding.

[0034] Therefore, by moving the upper left folding blade 16 and the upper right folding blade 17 downwards, the left and right sides of the bag opening are folded for the first time, and at this time, the left and right sides are folded downwards and are almost perpendicular to the bag opening body.

[0035] Furthermore, the lower folding blade assembly 2 also includes a lifting mounting plate 23 and a left lower folding blade 27 and a right lower folding blade 28 that are horizontally mounted on the mounting plate 23. A second motor 22 is provided on the fixed base 21. The second motor 22 is connected to the mounting plate 23 through a second lead screw 221. The second motor 22 is fixedly mounted on the fixed base 21. The second motor 22 drives the mounting plate 23 to move up and down through the second lead screw 221 and drives the left lower folding blade 27 and the right lower folding blade 28 to move up and down synchronously, so that the lower folding blade 27 and the right lower folding blade 28 move upward and closer to the cut bag opening through the mounting plate 23.

[0036] The mounting plate 23 is provided with two sliding plates 26, which are distributed on the left and right sides of the mounting plate 23. The sliding plates 26 can slide left and right on the mounting plate 23. That is, the lower left folding blade 27 and the lower right folding blade 28 are respectively mounted on the two sliding plates 26, so as to realize the left and right displacement of the lower left folding blade 27 and the lower right folding blade 28 through the sliding plates 26.

[0037] Specifically, the mounting plate 23 is equipped with a motor 24. The gear 241 of the motor 24 meshes with the rack 25 and is connected to the slide plate 26 through the rack 25. The motor 24 drives the left lower folding blade 27 and the right lower folding blade 28 to move left and right through the rack 25 and the slide plate 26.

[0038] Then, by moving the lower left folding blade 27 and the lower right folding blade 28 horizontally, that is, driving the lower left folding blade 27 to move to the left and driving the lower right folding blade 28 to move to the right, the downward-folded left and right side flanges are further folded, and the folded left and right side flanges are pressed and shaped, so that the left and right side flanges can be folded and shaped to fit the bag opening.

[0039] That is, the left and right folding edges of the bag opening are folded in two stages by the upper left folding knife 16 and the upper right folding knife 17, and the lower left folding knife 27 and the lower right folding knife 28, so as to ensure the folding effect of the left and right folding edges and prevent the left and right folding edges of the bag opening from springing back when the knife is withdrawn, thereby ensuring the quality of the subsequent sewing of the bag opening.

[0040] Example 2:

[0041] This embodiment also discloses a bag folding mechanism for a bag opening machine. The difference between this embodiment and embodiment 1 is that the fixed plate 13 in this embodiment is provided with a translation cylinder 18 for driving the upper left folding blade 16 and the upper right folding blade 17 to move. The front folding blade 14 and the rear folding blade 15 are also connected with translation cylinders 18. That is, the translation cylinders 18 are set on the fixed plate 13 and correspond one-to-one with the front folding blade 14, the rear folding blade 15, the upper left folding blade 16, and the upper right folding blade 17.

[0042] The translation cylinder 18 drives the upper left folding blade 16 and the upper right folding blade 17 to move left and right. That is, one translation cylinder 18 drives the upper left folding blade 16 to move to the left and the other translation cylinder 18 drives the upper right folding blade 17 to move to the right. By moving the upper left folding blade 16 and the upper right folding blade 17 left and right, the folding edges on the left and right sides of the bag opening are folded down.

[0043] Example 3:

[0044] This embodiment also discloses a bag folding mechanism for a bag opening machine. The difference between this embodiment and embodiment 2 is that the translation cylinder 18 in this embodiment is used to adjust the relative width between the upper folding blade 16 and the upper right folding blade 17, so that the upper folding blade 16 and the upper right folding blade 17 can more accurately fold the left and right sides of the bag opening downwards, thereby adapting to the folding of bags of different widths.

[0045] Example 4:

[0046] This embodiment also discloses a bag folding mechanism for a bag opening machine. The difference between this embodiment and embodiment 1 is that the fixed plate 13 in this embodiment is provided with a lifting cylinder 19 for driving the upper left folding blade 16 and the upper right folding blade 17 to rise and fall. The lifting cylinder 19 drives the upper left folding blade 16 and the upper right folding blade 17 to rise and fall respectively, and the upper left folding blade 16 and the upper right folding blade 17 are located above the front folding blade 14 and the rear folding blade 15.

[0047] In Embodiment 1, the front folding blade 14, rear folding blade 15, upper left folding blade 16, and upper right folding blade 17 form a rectangular frame. By driving the front folding blade 14, rear folding blade 15, upper left folding blade 16, and upper right folding blade 17 to move outward, the flaps on the front, back, left, and right sides of the bag opening can be folded. However, due to the above arrangement, the length of the upper left folding blade 16 and the upper right folding blade 17 must be less than the distance between the front folding blade 14 and the rear folding blade 15. Therefore, when the upper left folding blade 16 and the upper right folding blade 17 move left and right to fold the flaps on the left and right sides, the contact between the upper left folding blade 16 and the upper right folding blade 17 and the corresponding flaps on the left and right sides is limited.

[0048] In this embodiment, the upper left folding blade 16 and the upper right folding blade 17 are positioned above the front folding blade 14 and the rear folding blade 15. That is, after the front folding blade 14 and the rear folding blade 15 are moved back and forth and folded over the front and rear edges, the upper left folding blade 16 and the upper right folding blade 17 are then driven down into the cut bag opening by the lifting cylinder 19. At this time, the length of the upper left folding blade 16 and the upper right folding blade 17 can be set to be slightly smaller than the distance between the front folding blade 14 and the rear folding blade 15 after the back and forth movement, so that the longer upper left folding blade 16 and the upper right folding blade 17 can better abut against the folding of the left and right edges, thereby further improving the effect of the bag opening folding.

[0049] At the same time, the lifting cylinder 19 and the fixed plate 13 with lifting mechanism play a two-stage lifting role for the upper left folding blade 16 and the upper right folding blade 17. That is, the fixed plate 13 drives the upper left folding blade 16 and the upper right folding blade 17 to descend and approach the bag opening with folds, and the lifting cylinder 19 precisely controls the descent of the upper left folding blade 16 and the upper right folding blade 17 to fold the left and right sides of the bag opening downwards.

[0050] Furthermore, the lifting cylinder 19 can also be connected to the translation cylinder 18 so that the upper left folding blade 16 and the upper right folding blade 17 can have translation and lifting functions.

[0051] Example 5:

[0052] This embodiment also discloses a bag folding mechanism for a bag opening machine. The difference between this embodiment and Embodiment 1 is that in this embodiment, the lower left folding blade 27 and the lower right folding blade 28 are driven to rise and respectively abut or approach the lower left folding blade 16 and the upper right folding blade 17, which are in a downward displacement. The lower left folding blade 27 and the upper left folding blade 16 move to the left to fold the left side of the bag opening, and the lower right folding blade 28 and the upper right folding blade 17 move to the right to fold the right side of the bag opening. This continues until the upper left folding blade 16 moves to the left and is close to the left side of the bag opening, and the upper right folding blade 17 moves to the right and is close to the right side of the bag opening. At this point, the upper left folding blade 16 and the upper right folding blade 17 stop moving, and the lower left folding blade 27 and the lower right folding blade 28 continue to move to the left and right respectively to further fold the left and right sides of the bag opening.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bag-folding mechanism for a bag-opening machine, comprising a worktable (3), wherein a positioning window (31) is provided on the worktable (3), characterized in that: The positioning window (31) is provided with an upper folding knife assembly (1) and a lower folding knife assembly (2) corresponding to each other. The upper folding knife assembly (1) includes a fixed plate (13) that is raised and lowered, an upper left folding knife (16) and an upper right folding knife (17) provided on the fixed plate (13), and a front folding knife (14) and a rear folding knife (15) that are laterally moved. The lower folding knife assembly (2) includes a mounting plate (23) that is raised and lowered, and a lower left folding knife (27) and a lower right folding knife (28) that are laterally moved on the mounting plate (23).

2. The bag folding mechanism for a bag opening machine as described in claim 1, characterized in that: The fixed plate (13) is provided with a translation cylinder (18) for driving the upper left folding blade (16) and the upper right folding blade (17) to move.

3. The bag folding mechanism for a bag opening machine as described in claim 1, characterized in that: The fixed plate (13) is provided with a lifting cylinder (19) for driving the upper left folding blade (16) and the upper right folding blade (17) to rise and fall.

4. The bag folding mechanism for a bag opening machine as described in claim 1, characterized in that: The upper left folding blade (16) and the upper right folding blade (17) are located above the front folding blade (14) and the rear folding blade (15).

5. A bag-folding mechanism for a bag-opening machine as described in any one of claims 1 to 4, characterized in that: A folding bag seat (11) is provided on the crossbeam (32) of the workbench (3), and the motor (12) on the folding bag seat (11) is connected to the fixing plate (13) through the lead screw (121).

6. The bag folding mechanism for a bag opening machine as described in claim 1, characterized in that: The mounting plate (23) is provided with a sliding plate (26) that slides relative to each other, and the lower left folding blade (27) and the lower right folding blade (28) are respectively mounted on the two sliding plates (26).

7. A bag-folding mechanism for a bag-opening machine as described in claim 6, characterized in that: The mounting plate (23) is provided with a motor three (24), the gear (241) of the motor three (24) meshes with the rack (25) and is connected to the slide plate (26) through the rack (25).

8. The bag folding mechanism for a bag opening machine as described in claim 1, characterized in that: The lower folding blade assembly (2) includes a fixed base (21) and a second motor (22) mounted on the fixed base (21). The second motor (22) is connected to the mounting plate (23) via a second lead screw (221).

9. A bag-folding mechanism for a bag-opening machine as described in claim 1, characterized in that: The workbench (3) is provided with a material positioning component (4), which includes an outer pressure frame (41) and an inner pressure frame (42) arranged opposite to each other. The outer pressure frame (41) and the inner pressure frame (42) are provided with processing windows (43) corresponding to the positioning window (31).

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