A guide folding mechanism for a sewing machine

Abstract

The utility model provides a kind of guiding folding mechanism for sewing machine, including base and sewing device, further include a setting in the guiding folding piece of the sewing device needle head side, the guiding folding piece is equipped with the passage for edge cloth strip to pass through, the inside of the passage is provided with the transition piece for the gradual change folding of the edge cloth strip, the passage has one flared end of gradually increasing cross section and one necked end of gradually closing cross section;The flared end is used to receive the edge cloth strip of flat and flat.The utility model replaces the operation of traditional manual pre-folding, not only significantly improves production efficiency, more guarantees product fold mark uniform, stitch specification, greatly improves the quality consistency and reliability of edge operation.

Description

Technical Field

[0001] This utility model relates to a guide folding mechanism for a sewing machine. Background Technology

[0002] In the field of industrial sewing, especially in the edge sealing of filter screens used in air filters and water filters, a narrow strip of cloth (or other flexible material) is typically folded in half, wrapped around the edge of the filter screen, and sewn in place to create a neat and sturdy edge seal. This process is crucial for improving the overall structural strength and sealing performance of the filter.

[0003] Traditional processing methods rely heavily on manual operation: operators first fold the fabric strip to be edged to achieve the desired fold, then carefully place it over the edge of the filter screen before feeding it to the sewing machine presser foot for sewing. This method has several significant drawbacks: First, it depends entirely on the operator's skill and feel, making it difficult to guarantee the evenness and consistency of the folds, resulting in inconsistent product quality; second, the manual folding and positioning of the fabric strips is tedious and time-consuming, severely limiting production efficiency and failing to meet the needs of large-scale mass production; third, prolonged repetitive and delicate operations easily lead to visual and physical fatigue for operators, further increasing quality risks and production costs. Therefore, there is an urgent need for an auxiliary device that is simple in structure, easy to install, and can effectively improve the efficiency and quality of filter screen edge sealing operations. Utility Model Content

[0004] This invention provides a guiding folding mechanism for a sewing machine, which can effectively solve the above-mentioned problems.

[0005] This utility model is implemented as follows: A guiding folding mechanism for a sewing machine includes a base and a sewing device, and further includes a guiding folding member disposed on one side of the needle of the sewing device. The guiding folding member has a channel for a sealing strip to pass through, and the channel has a transition member inside for the sealing strip to be gradually folded in half. The channel has a flared inlet end with a gradually increasing cross-section and a constricted outlet end with a gradually narrowing cross-section. The flared inlet end is used to receive the flat sealing strip, and the outlet of the constricted outlet end is aligned with the needle of the sewing device, which can guide the folded sealing strip to the sewing position.

[0006] The beneficial effects of this utility model are: (1) This utility model provides a guide folding component with a special gradient channel on one side of the sewing machine needle. The transition component inside can smoothly and forcefully fold the flat edge sealing strip into the required shape automatically and accurately, and guide it directly to the sewing position. This replaces the traditional manual pre-folding operation, which not only significantly improves production efficiency, but also ensures uniform creases and standardized stitches, greatly improving the quality consistency and reliability of edge sealing operations. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the structure of this utility model.

[0009] Figure 2 This is a schematic diagram of the guide folding component of this utility model.

[0010] Figure 3 This is a diagram showing the input and output states of the fabric strip in this utility model.

[0011] Figure 4 This is a cross-sectional view of the port of the guide folding component of this utility model. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model.

[0013] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0014] Reference Figure 1-4 As shown, a guide folding mechanism for a sewing machine includes a base 10 and a sewing device 20.

[0015] It also includes a guide folding member 30 disposed on one side of the needle tip of the sewing device 20; the inner wall of the channel within the guide folding member 30 is smoothly transitioned, and its cross-sectional shape is a gradient geometry adapted to the folding shape of the edge sealing strip 40; the guide folding member 30 is made of abrasion-resistant material.

[0016] The guide folding member 30 is provided with a channel through which the edge sealing strip 40 passes. Inside the channel is a transition member 316 for the edge sealing strip 40 to be folded gradually. The channel has a flared inlet end 312 with a gradually increasing cross-section and a constricted outlet end 314 with a gradually constricting cross-section. The flared inlet end 312 is used to receive the flat edge sealing strip 40, and the outlet of the constricted outlet end 314 is aligned with the needle of the sewing device 20, which can guide the folded edge sealing strip 40 to the sewing position.

[0017] Specifically, the cross-section of the gradient channel from the flared inlet 312 to the constricted outlet 314 is continuous, smooth, and gradually changing. This design simulates the entire process of manually shaping a flat strip of fabric into a folded state. The flared end facilitates the introduction of the fabric and prevents it from getting stuck at the beginning; the constricted end ensures that the fabric strip is completely shaped into the required folded state at the outlet. The transition piece 316 is a core with a special geometric shape set inside the channel. It actively cooperates with the inner wall of the channel to form a gradually tightening "mold cavity," which forces and smoothly allows the edge-sealing fabric strip 40 to bend and fold along the preset path. The folding effect is more stable and precise. Furthermore, since the edge-sealing fabric strip 40 will continuously rub against the inner wall, the use of wear-resistant materials (such as high-carbon steel, ceramics, or special engineering plastics) greatly improves the service life of the parts and ensures the stability of long-term operation.

[0018] The end of the guide folding member 30 is also provided with a limiting clip 310, which is connected to the edge sealing strip 40, thereby restricting the upper and lower edges of the edge sealing strip 40 from contacting the flared entry end 312 and preventing the edge sealing strip 40 from being obstructed; the limiting clip 310 is an elastic bent rod component, which clamps the guide folding member 30 by its elasticity.

[0019] Specifically, when the edge-sealing strip 40 just enters the flared end, it is still in a flat state with the middle suspended in the air. The two sides are prone to curling up or bending down, which causes friction with the upper and lower surfaces of the channel, resulting in poor feeding or even jamming. The elastic limiting clamp 310 acts like a "gently pressing finger". It restrains the upper and lower edges of the strip, so that it can only be guided and bent along the width direction of the channel (left and right sides) and cannot be out of control in the vertical direction. This ensures that the strip enters the folding process in the correct posture from the beginning, which greatly improves reliability.

[0020] The guide folding component 30 is fixed to the base 10 by a mounting assembly. The mounting assembly includes a connecting plate 306 and a fixing seat 300. The connecting plate 306 is connected to the guide folding component 30 by a second screw 308, and the fixing seat 300 is fixed to the base 10 by a first screw 304. Both the connecting plate 306 and the fixing seat 300 are provided with adjustment grooves 302. The first screw 304 passes through the adjustment grooves 302 to connect the fixing seat 300 and the base 10. The front and rear positions of the guide folding component 30 on the horizontal plane can be adjusted by loosening the first screw 304.

[0021] Specifically, by adjusting the groove 302 and cooperating with the first screw 304 and the second screw 308, the position of the guiding folding piece can be finely adjusted in multiple dimensions, including front-back, left-right, and even high-low. This is crucial because it is necessary to ensure that the outlet of the tapered output end 314 can be precisely aligned with the sewing machine needle to accommodate fabric strips and products of different thicknesses and widths. This design gives the mechanism extremely high versatility and installation precision.

[0022] Working principle: The operator feeds the flat edge-sealing strip 40 into the flared inlet 312 behind the guide folding member 30. The edge-sealing strip 40 is first constrained by the limiting clamp 310, which restricts its upper and lower edges, preventing tumbling and jamming during feeding. Subsequently, the strip enters the forming channel, which is composed of the inner wall of the channel and the internal transition member 316, and has a continuously gradually changing cross-sectional geometry. The channel space smoothly narrows from the wide entrance to the narrow exit. During this process, the sides of the edge-sealing strip 40 are continuously... The fabric strip is evenly squeezed and guided inward, thus forcing it to gradually bend and fold along the center line. Finally, when the fabric strip has completely passed through the channel and is sent out from the shrink output end 314, it has been shaped into a neat and stable folded shape. At this time, the folded fabric strip is directly fed to the needle of the sewing device 20. The operator or automated equipment only needs to place it on the edge of the filter screen to directly perform sewing and sealing operations. No manual pre-folding operation is required throughout the process, which greatly improves production efficiency and product quality consistency.

[0023] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A guiding folding mechanism for a sewing machine, comprising a base (10) and a sewing device (20), characterized in that, It also includes a guide folding member (30) disposed on one side of the needle of the sewing device (20). The guide folding member (30) has a channel for the edge sealing strip (40) to pass through. The channel is provided with a transition member (316) for the edge sealing strip (40) to be folded gradually. The channel has a flared inlet end (312) with a gradually increasing cross-section and a constricted outlet end (314) with a gradually constricting cross-section. The flared inlet end (312) is used to receive the flat edge sealing strip (40). The outlet of the constricted outlet end (314) is aligned with the needle of the sewing device (20) and can guide the folded edge sealing strip (40) to the sewing position.

2. The guide folding mechanism for a sewing machine according to claim 1, characterized in that, The guide folding element (30) is fixed to the base (10) by a mounting component.

3. The guide folding mechanism for a sewing machine according to claim 2, characterized in that, The mounting assembly includes a connecting plate (306) and a fixing seat (300). The connecting plate (306) is connected to the guide folding member (30) by a second screw (308), and the fixing seat (300) is fixed to the base (10) by a first screw (304).

4. A guide folding mechanism for a sewing machine according to claim 3, characterized in that, Both the connecting plate (306) and the fixing seat (300) are provided with adjustment grooves (302). The first screw (304) passes through the adjustment groove (302) to connect the fixing seat (300) and the base (10). The front and rear positions of the guide folding piece (30) on the horizontal plane can be adjusted by loosening the first screw (304).

5. A guide folding mechanism for a sewing machine according to claim 1, characterized in that, The end of the guide folding member (30) is also provided with a limiting clip (310), which is connected to the edge sealing strip (40) to restrict the upper and lower edges of the edge sealing strip (40) from contacting the flared inlet end (312) and prevent the edge sealing strip (40) from being obstructed.

6. A guide folding mechanism for a sewing machine according to claim 5, characterized in that, The limiting clamp (310) is an elastic bending rod component that clamps the guide folding component (30) by its elastic force.

7. A guide folding mechanism for a sewing machine according to claim 1, characterized in that, The inner wall of the channel within the guide folding member (30) is smoothly transitioned, and its cross-sectional shape is a gradient geometry adapted to the folding form of the edge sealing strip (40).

8. A guide folding mechanism for a sewing machine according to claim 1, characterized in that, The guide folding element (30) is made of wear-resistant material.

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