Edge folding mechanism of bag opening machine

Abstract

The utility model provides an edge folding mechanism of a bag opening machine, and belongs to the technical field of bag opening machines. The edge folding mechanism solves the technical problem that the edge folding sewing effect of an edge folding mechanism of an existing bag opening machine is irregular. The bag opening machine comprises a workbench, an edge folding mechanism comprises a pressing frame seat and a folding knife which are both connected to the workbench, the pressing frame seat is provided with a bag opening window, the lower side edge of the folding knife is horizontally bent into an L shape and forms an edge turning part, and an elastic pressing plate which is partially and fixedly connected to the pressing frame seat and is horizontally arranged is further arranged below the pressing frame seat. The side edge, located on the periphery of the bag opening window, of the elastic pressing plate can swing downwards, the flanging part is provided with a plurality of strip-shaped first comb teeth arranged at intervals, the side edge, close to the bag opening window, of the elastic pressing plate is provided with a plurality of strip-shaped second comb teeth arranged at intervals, and the second comb teeth are arranged towards the side where the bag opening window is located. And when the flanging part moves to the second comb teeth, each first comb tooth is positioned at a position which is over against the tooth space of the two adjacent second comb teeth up and down. According to the utility model, the follow-up sewing effect is more tidy.

Description

Technical Field

[0001] This utility model belongs to the field of bag opening machine technology, and relates to a folding mechanism. Background Technology

[0002] A pocket opening machine is a special sewing machine for sewing the opening of pockets in clothing. When the pocket opening machine is working, it first cuts a "I" shaped pocket seam on the surface of the fabric, and then folds and clamps the free fabric on both sides of the pocket seam through the folding mechanism for subsequent sewing to form a pocket.

[0003] For example, patent application publication number CN117966377A discloses a bag opening machine and a bag opening sewing process. The bag opening machine is equipped with a worktable, a sewing device, a laser cutting device, a bag opening forming device, and an accessory carrying device. The bag opening forming device includes a folding mechanism and a material fixing mechanism. The folding mechanism is located above the material fixing mechanism, and the bag opening forming device can move on the worktable. The bag opening sewing process involves positioning the bag opening fabric piece on the bag opening forming device and sequentially performing steps such as cutting, folding, attaching accessories, sewing, and unloading.

[0004] The aforementioned pocket-opening machine can fold the fabric through the insertion of a blade, and then use the upward swing of the folding edge pressure plate at the bottom of the outer pressure frame to clamp the fabric with the lower side of the blade exposed, so as to hold the fabric in place for subsequent sewing. However, there are still shortcomings: the folded edge of the lower side of the blade covers most of the folded fabric, and the folding edge pressure plate can only position a small area of ​​the outer edge of the fabric. The fabric is prone to deformation and repositioning during subsequent sewing, resulting in uneven sewing and affecting the appearance of the sewing. Summary of the Invention

[0005] This utility model addresses the aforementioned problems in existing technologies by providing a folding mechanism for a bag opening machine. The technical problem this utility model aims to solve is that the folding and sewing effect of existing bag opening machines is not uniform.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A folding mechanism for a bag-opening machine, the bag-opening machine including a worktable, the folding mechanism including a pressure frame seat and a folding knife both connected to the worktable, the pressure frame seat being horizontally plate-shaped and having a bag-opening window, the folding knife being able to move up and down and forward and backward, the lower side of the folding knife being horizontally bent into an L-shape to form a flange, and a partially fixed elastic pressure plate arranged horizontally on the pressure frame seat below the pressure frame seat, the side of the elastic pressure plate located around the bag-opening window being able to swing downward, characterized in that the flange has a plurality of spaced strip-shaped first comb teeth, the side of the elastic pressure plate near the bag-opening window having a plurality of spaced strip-shaped second comb teeth, the second comb teeth being arranged towards the side where the bag-opening window is located, and when the flange moves to the second comb teeth, each first comb tooth is in a position directly opposite the tooth gap of two adjacent second comb teeth.

[0008] The pressure frame is used to support and clamp the fabric of the pocket to be opened, facilitating precise cutting, folding, and sewing operations. After the fabric at the pocket opening window is cut, an "I"-shaped cut slit will be formed on the surface. Then, the folding knife can be inserted downwards into the cut slit. By moving the folding knife back and forth, part of the movable fabric at the cut slit can be folded over to the lower side of the pressure frame around the pocket opening window through the upper surface of the folding part. Then, by releasing the pre-opened downward elastic pressure plate, it deforms and returns to its original shape upwards to clamp the edge of the folded movable fabric, so that the fabric continues to maintain the folded state after the folding knife is removed. By setting multiple first comb teeth arranged at left and right intervals in the folding part, and setting second comb teeth arranged at left and right intervals on the side of the elastic pressure plate near the pocket opening window, when the first comb teeth move to the second comb teeth during the folding process, they are all vertically aligned with the gaps of the adjacent second comb teeth. The folding knife, inserted into the pocket opening window, moves towards the inner wall of the opening window in a front-to-back direction to fold the fabric edge. The upper side of the first comb tooth supports the fabric edge and folds it to the lower surface of the pressure frame. When the elastic pressure plate is reset, the second comb tooth swings upward and can pass through and fall into the gap between the first comb teeth. At this time, the upper side of the second comb tooth simultaneously presses down on the fabric edge. Because the first comb tooth provides clearance, the second comb tooth can support a deeper area of ​​fabric, thus effectively preventing the fabric from losing its restraint and wrinkling or rebounding. When the first comb tooth retracts, it can first move downward to pass through the gap between the second comb teeth, then move back and forth and retract upward to exit from the pocket opening window to achieve reset. Thus, without affecting the normal reset of the folding knife, it can effectively improve the clamping stability of the fabric during the folding process and ensure a neater sewing effect.

[0009] In the folding mechanism of the bag opening machine, the tip of the second comb tooth is inclined upward. When the elastic pressing plate swings upward after deformation, the tip of the second comb tooth can first contact the fabric at the root of the first comb tooth, and gradually press the fabric toward the root of the second comb tooth during the pressing process. That is, the second comb tooth can gradually flatten the fabric outward during pressing, making the fabric more flat and facilitating further sewing to make the subsequent sewing effect more uniform.

[0010] In the folding mechanism of the bag opening machine, the elastic pressing plate is arranged on both sides of the bag opening window. The two elastic pressing plates can independently clamp and control the fabric folded at the front and rear of the bag opening window, and can be applied to a single folding knife. Compared with a single elastic pressing plate, the swinging range of the second comb tooth is uniform, and the second comb tooth far from the elastic pressing plate cannot be clamped due to excessive deflection.

[0011] In the folding mechanism of the bag opening machine, the elastic pressing plate and the second comb tooth are integrated. This can ensure the stability of the connection of the overall structure and avoid cracking of the second comb tooth.

[0012] As another solution, the pressing frame seat includes a seat plate and two slidingly connected stop positioning plates. The bag opening window is formed between the two stop positioning plates. The second comb tooth is fixed to the side of the elastic pressing plate, and the second comb tooth abuts against or leaves a gap with the upper stop positioning plate. This arrangement allows the second comb tooth and the elastic pressing plate to be made of different materials, which can make the elastic pressing plate have better strength and elasticity, and the second comb tooth have better flexibility. When the second comb tooth contacts the fabric, all the second comb teeth can adaptively deform to maintain the clamping effect even if the surface of the fabric is uneven.

[0013] In the folding mechanism of the bag opening machine, the vertical thickness of the second comb tooth is smaller than the vertical thickness of the elastic pressing plate. This can make the second comb tooth have better flexibility relative to the elastic pressing plate, maintain the reset performance, and clamp the fabric more fully.

[0014] In the folding mechanism of the bag opening machine, the length of the second comb tooth in the front-rear direction is greater than the length of the first comb tooth in the front-rear direction. This can ensure that the second comb teeth have sufficient clearance, and the second comb teeth can more easily contact the fabric and deform adaptively to ensure clamping sufficiency.

[0015] In the folding mechanism of the bag opening machine, the upper side edges of the tips of the first comb teeth are chamfered. When the first comb teeth push the fabric to bend, the upper side edges will not pierce into the fabric, avoiding damage or even tearing of the fabric.

[0016] In the folding mechanism of the aforementioned bag-opening machine, the dimension of the first comb tooth in the front-to-back direction is slightly smaller than or equal to the dimension of the folded portion in the front-to-back direction. This allows the root of the first comb tooth to be closer to the point where the fabric begins to fold, thus facilitating the second comb tooth's end to support the fabric at a deeper position. This ensures a more stable folding state for the fabric.

[0017] In the folding mechanism of the bag opening machine described above, the root of the first comb tooth is bent vertically upwards in an L-shape. In this way, the root of the first comb tooth can still form a certain height clearance space in the vertical direction, so that the end of the second comb tooth will not cause rigid interference with the folding part due to the length of the first comb tooth being too short when it is reset and clamped.

[0018] In the folding mechanism of the bag opening machine described above, the root of the second comb tooth is rounded. This helps to prevent stress concentration at the root of the second comb tooth during repeated deformation, which could lead to cracking and ensure service life.

[0019] Compared with the prior art, the advantages of this utility model are as follows:

[0020] After the folding blade retracts, the folding mechanism of this pocket opening machine can clamp the bent fabric edge over a larger area, which helps to fully ensure the stability of the fabric state during subsequent sewing and thus improves the sewing quality. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of Embodiment 1.

[0022] Figure 2 This is a three-dimensional schematic diagram of a partial structure from another perspective in this embodiment.

[0023] Figure 3 yes Figure 2 Enlarged view of part A in the image.

[0024] Figure 4 This is a front view schematic diagram of a partial structure in this embodiment.

[0025] Figure 5 yes Figure 4 Schematic diagram of BB cross section (elastic pressure plate in open state).

[0026] Figure 6 yes Figure 5 Enlarged view of section C in the image.

[0027] Figure 7 This is a three-dimensional structural diagram of a local structure in the folded state of this embodiment.

[0028] Figure 8 yes Figure 7 Enlarged view of part D in the image.

[0029] Figure 9 is a side view structural schematic diagram of the folding knife and the second comb tooth in the second embodiment.

[0030] In the figure, 1, workbench;

[0031] 2, pressing frame seat; 21, bag opening window; 22, seat plate; 23, stop opening positioning plate;

[0032] 3, folding knife; 31, flange part; 311, first comb tooth;

[0033] 4, elastic pressing plate; 41, second comb tooth; 5, ejector; 6, truss; 7, folding flange support. DETAILED DESCRIPTION

[0034] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0035] Embodiment one:

[0036] As Figures 1-8As shown, the edge folding mechanism of the bag opening machine comprises a workbench 1, a left-right transversely arranged truss 6 fixedly connected to the workbench 1, a press frame seat 2 and an edge folding support 7 capable of moving left and right, both connected to the truss 6, two folding knives 3 capable of ascending and descending and opening and closing forward and backward, connected to the edge folding support 7, the specific structure of the press frame seat 2 and the edge folding support 7 can refer to the prior art, the press frame seat 2 is provided with a bag opening window 21 arranged in a strip shape in the left-right direction, which is formed by the existing two edge limiting plates on the press frame seat 2, the lower side of the folding knife 3 is horizontally bent into an L shape and forms a flanging part 31, the press frame seat 2 is further provided with an elastic pressing plate 4 fixedly connected to the press frame seat 2 and arranged horizontally, the elastic pressing plate 4 is located at the side of the periphery of the bag opening window 21 and can swing downward under the drive of an ejector 5 connected to the press frame seat 2, the flanging part 31 has a plurality of first comb teeth 311 arranged in a strip shape and spaced apart in the left-right direction, a plurality of second comb teeth 41 arranged in a strip shape and spaced apart in the left-right direction are welded and fixedly connected to the side of the elastic pressing plate 4 close to the bag opening window 21, the second comb teeth 41 are arranged on the side where the bag opening window 21 is located, a plurality of first comb teeth 311 can be staggered with a plurality of second comb teeth 41, when the flanging part 31 moves directly above the second comb teeth 41, the first comb teeth 311 can all pass through the gaps between the corresponding second comb teeth 41 downward. Specifically, the elastic pressing plate 4 has two and is arranged in the front and back of the bag opening window 21. Further, the press frame seat 2 comprises a seat plate 22 and two existing stop positioning plates 23 slidably connected to the seat plate 22, the bag opening window 21 is formed between the two stop positioning plates 23, as a preferred embodiment, the second comb teeth 41 are fixedly connected to the lower side of the elastic pressing plate 4, a gap is left between the second comb teeth 41 and the upper stop positioning plate 23, as a preferred embodiment, the vertical thickness dimension of the second comb teeth 41 is smaller than the vertical thickness dimension of the elastic pressing plate 4, the length dimension of the second comb teeth 41 in the front-back direction is greater than the length dimension of the first comb teeth 311 in the front-back direction. The dimension of the first comb teeth 311 in the front-back direction is equal to the dimension of the flanging part 31 in the front-back direction, the root of the first comb teeth 311 is vertically bent upward into an L shape, and the root of the second comb teeth 41 is treated by a round corner transition.

[0037] After the folding knife 3 is inserted into the bag opening window 21, the movable part of the fabric can be opened downward, then the two folding knives 3 are opened in the front-back direction and close to the front-back inner wall of the bag opening window 21, thereby driving the movable part of the fabric to be supported on the upper side of the first comb teeth 311 by the flanging part and realizing fabric folding, then the ejector 5 is retracted to make the elastic pressing plate 4 reset upward and drive the second comb teeth 41 to pop up, because the second comb teeth 41 are arranged in a staggered manner with the first comb teeth 311, the end of the second comb teeth 41 can clamp the fabric at the root of the first comb teeth 311, that is, the fabric closer to the inner wall area of the bag opening window 21 can be clamped, then the folding knife 3 moves downward first to make the first comb teeth 311 pass through the second comb teeth 41, and then the folding knife 3 is reset by folding and moving upward.

[0038] Example two:

[0039] As Figure 9 shown, the embodiment is basically same with example one, the difference is that the end of the second comb 41 is inclined upward, and the upper edge of the end of the first comb 311 is chamfered.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A bag opening machine's edge folding mechanism, the bag opening machine comprising a worktable (1), the edge folding mechanism comprising a pressing frame seat (2) and a folding knife (3) both connected to the worktable (1), the pressing frame seat (2) being in the shape of a horizontal plate and having a bag opening window (21), the folding knife (3) being able to move up and down and translate forward and backward, the lower side of the folding knife (3) being horizontally bent into an L shape and forming a flange (31), the lower side of the pressing frame seat (2) further being provided with an elastic pressing plate (4) which is partially fixed to the pressing frame seat (2) and horizontally arranged, the elastic pressing plate (4) being able to swing downward at the side of the periphery of the bag opening window (21), characterized in that, The flanging part (31) has a plurality of first comb teeth (311) arranged in intervals in a strip shape, the elastic pressing plate (4) has a plurality of second comb teeth (41) arranged in intervals in a strip shape near the side edge of the bag opening window (21), the second comb teeth (41) are arranged towards the side where the bag opening window (21) is located, and each first comb tooth (311) is in a position vertically opposite to the tooth gaps of two adjacent second comb teeth (41) when the flanging part (31) moves to the position of the second comb teeth (41).

2. The hemming mechanism of a bag opener according to claim 1, characterized in that, The end of the second comb tooth (41) is arranged in an upwardly inclined manner.

3. A hemming mechanism of a bag opener according to claim 1 or 2, characterized in that The elastic pressing plate (4) and the second comb tooth (41) are in an integral structure.

4. The flap folding mechanism of a bag opener according to claim 1 or 2, characterized in that The pressing frame base (2) comprises a base plate (22) and two stop positioning plates (23) slidably connected to the base plate (22), the bag opening window (21) is formed between the two stop positioning plates (23), the second comb tooth (41) is fixedly connected to the side edge of the elastic pressing plate (4), and the second comb tooth (41) abuts against or leaves a gap with the upper stop positioning plate (23).

5. The flap folding mechanism of a bag opener according to claim 4, characterized in that The vertical thickness dimension of the second comb tooth (41) is less than the vertical thickness dimension of the elastic pressing plate (4).

6. The hemming mechanism of a bag opener according to claim 4, wherein The length dimension of the second comb tooth (41) in the front-rear direction is greater than the length dimension of the first comb tooth (311) in the front-rear direction.

7. The flap folding mechanism of a bag opener according to claim 1 or 2, characterized in that The upper side edges of the ends of the first comb teeth (311) are all chamfered and transitioned.

8. The hemming mechanism of a bag opener according to claim 1 or 2, characterized in that, The dimension of the first comb tooth (311) in the front-rear direction is slightly less than or equal to the dimension of the flanging part (31) in the front-rear direction.

9. The flap folding mechanism of a bag opener according to claim 8, characterized in that The root of the first comb tooth (311) is vertically bent upwards in an L shape.

10. The hemming mechanism of a bag opener according to claim 1 or 2, characterized in that, The root of the second comb tooth (41) is roundly transitioned.

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