Edge folding assembly of bag opening machine

Abstract

The utility model provides an edge folding assembly of a bag opening machine, and belongs to the technical field of bag opening machines. The edge folding assembly solves the technical problem that the edge folding quality of an existing edge folding assembly of the bag opening machine is difficult to guarantee. The bag opening machine comprises a workbench, a pressing frame base is connected to the workbench, an edge folding assembly comprises two folding knives which are arranged in the left-right direction and arranged front and back and an elastic pressing plate which is connected to the bottom of the pressing frame base and horizontally arranged, and the elastic pressing plate is used for clamping the side edge of fabric to be arranged in the left-right direction and can swing up and down; the lower side edges of the front folding knife and the rear folding knife are bent forwards and backwards to be in an L shape and each provided with a plurality of strip-shaped first comb teeth arranged at intervals, the two elastic pressing plates are arranged at intervals in the front-back direction, the side edges, used for clamping fabric, of the two elastic pressing plates are oppositely arranged, and each elastic pressing plate is provided with a plurality of strip-shaped second comb teeth arranged at intervals. And the plurality of first comb teeth can be staggered with the plurality of second comb teeth. The edge folding device can improve the clamping stability of the fabric and guarantee the edge folding quality.

Description

Technical Field

[0001] This utility model belongs to the field of bag opening machine technology, and relates to a folding component for a bag opening machine. 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 above structure only clamps the edge of the fabric when folding. Since the two fabrics are clamped synchronously through the same folding plate, the fabric on the side away from the fixed position of the folding plate is easily affected by the interference of the other fabric, which makes the clamping effect unstable. This can easily lead to uneven sewing results. Summary of the Invention

[0005] This utility model addresses the aforementioned problems in existing technologies by providing a folding assembly for a bag opening machine. The technical problem this utility model aims to solve is: how to ensure the folding quality of the bag opening machine.

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

[0007] A folding assembly for a bag opening machine includes a worktable with a pressure frame connected to it. The folding assembly includes two folding blades arranged horizontally and back-to-back, and an elastic pressure plate connected to the bottom of the pressure frame and arranged horizontally. The elastic pressure plate is used to clamp the side edge of the fabric, which is arranged horizontally and back-to-back and can swing up and down. The folding assembly is characterized in that the lower side edges of the two folding blades are bent forward and backward into L-shapes, respectively, and each has a plurality of first comb teeth arranged in a strip shape and spaced apart. There are two elastic pressure plates arranged back-to-back and spaced apart. The two elastic pressure plates are arranged opposite each other to clamp the side edge of the fabric and each has a plurality of second comb teeth arranged in a strip shape and spaced apart. The plurality of first comb teeth can intersect with the plurality of second comb teeth.

[0008] The pressure frame is used to hold and place the fabric that needs to be opened. The folding knife is used to insert into the "I"-shaped slit of the fabric and work with the existing opening window on the pressure frame to fold the fabric. Initially, the elastic pressure plate is pushed downward by the existing pusher, causing one side to be open. After the folding knife completes the folding, it swings upward to clamp and press the fabric exposed on the lower side of the folding knife, ensuring the effect of subsequent sewing. Multiple strip-shaped first comb teeth that bend forward and backward are set on the lower side of the front and rear folding knives, and two elastic pressure plates are arranged at intervals. On the side used to clamp the fabric, there are multiple strips of first comb teeth that bend forward and backward respectively. Multiple strip-shaped second comb teeth are placed, and several first comb teeth on the two folding blades can intersect with several second comb teeth on the sides of the two elastic pressure plates. In this way, during the folding process, the fabric at the root of the first comb teeth can be exposed, so that the second comb teeth can clamp the fabric in that area. This effectively avoids the probability of the fabric falling out of the clamping position, which is conducive to higher sewing quality. At the same time, the two elastic pressure plates can swing independently, thus preventing the second comb teeth from not moving up fully due to uneven pressure on the other second comb teeth when they swing upwards as the elastic pressure plates return to their original position. This ensures the clamping stability of the fabric and guarantees the folding quality.

[0009] In the folding assembly of the aforementioned bag-opening machine, a folding bracket is connected to the worktable. The middle section of the folding blade is horizontally bent into a Z-shape, and the upper half of the folding blade is detachably connected to the folding bracket. The folding bracket can be an existing component. The horizontal Z-shape of the middle section of the folding blade ensures that the connection positions of the upper halves of the two folding blades are not too close, facilitating space arrangement. It also allows users to easily and adaptably change folding blades of different lengths to meet the requirements of making pockets of different lengths.

[0010] In the folding assembly of the aforementioned bag-opening machine, the folding blade has a vertically arranged strip-shaped hole, and the folding blade is fixed to the folding bracket by a connector passing through the strip-shaped hole. This allows the user to easily adjust the position of the connector relative to the strip-shaped hole to change the initial height position of the first comb tooth, making it convenient for use with fabrics of different thicknesses. Of course, the folding blade can also be connected to the folding bracket by means of insertion or tight fit.

[0011] In the folding assembly of the bag opening machine, the spacing between the left sides of the adjacent second comb teeth on the left half of the elastic pressure plate is 'a', and the spacing between the right sides of the adjacent second comb teeth on the right half of the elastic pressure plate is 'b', and 'a' and 'b' are not equal. The spacing between the left sides of the adjacent first comb teeth on the left half of the folding blade is 'a', and the spacing between the right sides of the adjacent first comb teeth on the right half of the folding blade is 'b'. Several first comb teeth can intersect with several second comb teeth. When making pockets of different lengths, folding blades with different bottom edge lengths are required. To ensure the fabric folds fully, both ends of the bottom edge of the folding blade must have exactly one first comb tooth. Therefore, folding blades with the same spacing can only be used when the pocket length is exactly the same as the length after adding or subtracting integers of the first comb tooth, resulting in a very limited applicability. To accommodate pockets of various lengths, multiple sets of folding blades with different spacing and corresponding second comb teeth need to be designed, leading to excessive design costs. However, by setting 'a' and 'b' to be different, an additional first comb tooth is added to the half with the larger spacing, and a smaller one is added to the other half. The length increase of the lower side of the folding knife by one comb tooth is only the absolute value of the difference between a and b. Similarly, by reducing one first comb tooth in the design of the half with a larger spacing and adding one comb tooth in the design of the other half, the length of the lower side of the folding knife can be reduced with higher precision to adapt to the pocket length. The specifications of the second comb tooth do not need to be changed. Only one type of first comb tooth and second comb tooth with a spacing specification needs to be designed. By cutting the first comb teeth at both ends, the folding requirements of the pockets of each length can be met with high precision. This greatly reduces the design cost and the cumbersomeness of changing molds of different sizes. Thus, while ensuring the folding quality, it can be applied to the folding requirements of pockets of different lengths at low cost.

[0012] In the folding assembly of the aforementioned bag-opening machine, the difference between the spacing between the left side of the adjacent second comb tooth on the left half of the elastic pressure plate and the spacing between the right side of the adjacent second comb tooth on the right half of the elastic pressure plate is 1 mm. The smallest unit for variation in existing pocket length specifications is 1 mm. This allows for the design of the first and second comb teeth with a single spacing specification to meet the folding requirements of all existing pocket lengths, reducing design costs.

[0013] In the folding assembly of the bag opening machine described above, the number of second comb teeth on the side of the elastic pressure plate is greater than the number of first comb teeth. This pre-reserves sufficient second comb teeth, eliminating the need for replacement; only the folding blade of different length needs to be replaced for bag openings of different lengths, making operation more convenient.

[0014] In the hemming assembly of the aforementioned bag-opening machine, the left-right width of the second comb tooth located on the left half of the elastic pressure plate is either greater or less than the left-right width of the second comb tooth located on the right half of the elastic pressure plate. This greater regional adaptability also increases the width of the second comb tooth itself, which helps to ensure a uniform strength distribution in different areas, thereby ensuring a balanced and stable clamping effect of the second comb tooth on the fabric.

[0015] In the folding assembly of the bag opening machine described above, the left-right width of the first comb tooth located on the left half of the folding blade is adaptable to be greater or less than the left-right width of the first comb tooth located on the right half of the folding blade. Similarly, this helps to ensure a uniform distribution of the left-right strength of the first comb tooth, thus ensuring structural stability.

[0016] Compared with the prior art, the advantages of this utility model are as follows:

[0017] The folding assembly of this bag opening machine can ensure folding quality and meet the folding requirements of pockets of different lengths by only requiring the design of a uniform first comb tooth and a second comb tooth, thus reducing design costs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0019] Figure 2 This is a three-dimensional structural diagram of the folding knife, elastic pressure plate, and second comb teeth in this embodiment.

[0020] Figure 3 This is a partial bottom view of the folding knife in this embodiment.

[0021] Figure 4 This is a bottom view of the structure in this embodiment, showing the folding blade and the second comb teeth in an interlaced state.

[0022] Figure 5 yes Figure 4 Enlarged view of part A in the image.

[0023] In the diagram, 1 is the workbench; 2 is the pressure frame seat.

[0024] 3. Folding knife; 31. First comb tooth; 32. Strip hole;

[0025] 4. Elastic pressure plate; 41. Second comb tooth; 5. Truss; 6. Folded edge bracket. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] like Figures 1-5As shown, in the hemming assembly of this bag-opening machine, the bag-opening machine includes a worktable 1. A truss 5 arranged horizontally is connected to the worktable 1. A pressure frame seat 2, which can move left and right and rise and fall, is connected to the truss 5. A hemming bracket 6, which can slide left and right, is also connected to the truss 5. The basic structure of the hemming bracket 6 can refer to existing technology. The hemming assembly includes folding blades 3 arranged in the left-right direction and an elastic pressure plate 4 connected to the bottom of the pressure frame seat 2 and arranged horizontally. The folding blades 3 are detachably connected to the hemming bracket 6. Specifically, the folding blades 3 have five vertically arranged strip holes 32 spaced left and right. The folding blades 3 are fixed to the hemming bracket 6 by bolts (not shown) passing through the strip holes 32. The elastic pressure plate 4 is used to clamp the side edge of the fabric, arranged in the left-right direction and able to swing up and down. The lower side of the folding blade 3 has multiple strip-shaped first comb teeth 31 arranged at intervals in the left-right direction. The ends of the first comb teeth 31 are horizontally positioned towards the side where the elastic pressure plate 4 is located. Multiple strip-shaped second comb teeth 41 are welded and fixed to the side of the elastic pressure plate 4 used to clamp the fabric. The multiple second comb teeth 41 are arranged at intervals in the left-right direction. The interval between adjacent second comb teeth 41 on the left half of the elastic pressure plate 4 is 'a', and the interval between adjacent second comb teeth 41 on the right half of the elastic pressure plate 4 is 'b', where 'a' is greater than 'b'. The interval between adjacent first comb teeth 31 on the left half of the folding blade 3 is the same as 'a', and the interval between adjacent first comb teeth 31 on the right half of the folding blade 3 is the same as 'b'. All the first comb teeth 31 can intersect with the multiple second comb teeth 41. Preferably, 'a' is 6 mm and 'b' is 5 mm. The number of second comb teeth 41 on the side of the elastic pressure plate 4 is greater than the number of first comb teeth 31. The left-right width of the second comb tooth 41 located on the left half of the elastic pressure plate 4 is more adaptable than that of the second comb tooth 41 located on the right half of the elastic pressure plate 4. The left-right width of the first comb tooth 31 located on the left half of the folding blade 3 is more adaptable than that of the first comb tooth 31 located on the right half of the folding blade 3.

[0028] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A folding assembly for a bag opening machine, the bag opening machine including a worktable (1), a pressure frame seat (2) connected to the worktable (1), the folding assembly including two folding blades (3) arranged in a left-right direction and front-back arrangement and an elastic pressure plate (4) connected to the bottom of the pressure frame seat (2) and arranged horizontally, the elastic pressure plate (4) being used to clamp the side edge of the fabric arranged in a left-right direction and capable of swinging up and down, characterized in that, The lower sides of the two folding blades (3) are bent forward and backward respectively into an L shape and each has several strip-shaped and spaced first comb teeth (31). There are two elastic pressure plates (4) arranged at intervals. The two elastic pressure plates (4) are used to clamp the sides of the fabric opposite each other and each has several strip-shaped and spaced second comb teeth (41). The first comb teeth (31) on the two folding blades (3) can intersect with the second comb teeth (41) on the two elastic pressure plates (4).

2. The folding assembly of the bag opening machine according to claim 1, characterized in that, The workbench (1) is connected to a folding bracket (6), and the middle section of the folding knife (3) is bent horizontally into a Z shape. The upper half of the folding knife (3) is detachably connected to the folding bracket (6).

3. The folding assembly of the bag opening machine according to claim 2, characterized in that, The upper half of the folding knife (3) has a vertically arranged strip hole (32), and the folding knife (3) is fixed to the folding bracket (6) by a connector that passes through the strip hole (32).

4. The folding assembly of the bag opening machine according to claim 1 or 2, characterized in that, The spacing between the left side of the second comb tooth (41) on the left half of the elastic pressure plate (4) is a, and the spacing between the right side of the second comb tooth (41) on the right half of the elastic pressure plate (4) is b, and a and b are not equal. The spacing between the left side of the first comb tooth (31) on the left half of the folding knife (3) is a, and the spacing between the right side of the first comb tooth (31) on the right half of the folding knife (3) is b.

5. The folding assembly of the bag opening machine according to claim 4, characterized in that, The difference between a and b is 1 mm.

6. The folding assembly of the bag opening machine according to claim 1 or 2, characterized in that, The number of second comb teeth (41) on the side of the elastic pressure plate (4) is greater than the number of first comb teeth (31).

7. The folding assembly of the bag opening machine according to claim 4, characterized in that, The left and right width of the second comb tooth (41) located on the left half of the elastic pressure plate (4) is adapted to be greater than or less than the left and right width of the second comb tooth (41) located on the right half of the elastic pressure plate (4).

8. The folding assembly of the bag opening machine according to claim 4, characterized in that, The left and right width of the first comb tooth (31) located on the left half of the folding knife (3) is adapted to be greater than or less than the left and right width of the first comb tooth (31) located on the right half of the folding knife (3).

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