An explosion-proof crotch locking device

Abstract

This utility model relates to the field of textile machinery and equipment, and discloses an explosion-proof crotch locking device, including a presser foot. A through groove is formed on the upper middle side of the presser foot. An mounting component a is fixedly connected to the upper rear side of the presser foot near the through groove, and another mounting component b is fixedly connected to the upper rear side of the presser foot. The front side of the presser foot is bifurcated, and a guide groove is formed in an arc shape to the left rear at the bifurcation point. In this utility model, through the coordinated constraint of the adjusting component, the guide groove, and the guide component, and the cooperation of the cutting and positioning component, the fabric edge forms a tightly fitted inward-rolled structure, completely wrapping the spandex fibers inside the fabric within the folded layer. This prevents the spandex fibers from breaking or bursting due to excessive local stress, solving the problem of burrs in the locking process of elastic fabrics, and significantly improving the durability and quality stability of the finished product.

Description

Technical Field

[0001] This utility model relates to the field of textile machinery and equipment, and in particular to an explosion-proof crotch locking device. Background Technology

[0002] In the textile industry, such as garment processing and home textile production, overlock machines are core equipment to ensure the smoothness of fabric edges and prevent fraying. The presser foot, as a key component of the overlock machine, directly affects the processing accuracy and aesthetics of the finished product.

[0003] Traditional presser foot structures are mostly designed in a straight line. Straight guide grooves can only achieve simple folding of the fabric and cannot drive the edges of elastic fabrics to form a tight inward curl structure. Due to the elasticity of the fabric itself, fabrics containing spandex are prone to edge warping and loose folding during the conveying process, resulting in the internal spandex fibers being exposed on the outside of the folded edge. The exposed spandex not only affects the cleanliness of the finished product, but also rubs against the needle bar and sewing thread in the subsequent overlocking process, increasing the risk of processing failure. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides an explosion-proof crotch locking device, which aims to solve the problem in the prior art that "the traditional locking machine presser foot folding device adopts a linear guide structure, which cannot drive the spandex elastic fabric to form a tight inward roll, resulting in edge warping, loose folding, and exposed spandex fibers during fabric conveying".

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an explosion-proof crotch locking device, comprising a presser foot, wherein a through groove is provided through the upper middle part of the presser foot, an mounting component a is fixedly connected to the rear side of the upper part of the presser foot near the through groove, an mounting component b is fixedly connected to the rear side of the upper part of the presser foot, the front side of the presser foot is bifurcated, a guide groove is provided arc-shaped to the left rear side at the bifurcation point of the front side of the presser foot, a distribution plate is fixedly connected to the lower middle part of the bifurcation point of the presser foot, a cutting and positioning component is fixedly connected to the end of the left side of the presser foot near the guide groove, and a guide component is rotatably connected to the right side of the presser foot through an adjustment component, the guide component being disposed on the upper part of the right edge of the guide groove.

[0006] As a further description of the above technical solution: The cutting positioning assembly includes a mounting groove, which is located on the left side of the presser foot and at the left end of the guide groove. A cutting blade is inserted into the inner wall of the mounting groove. A contact element is fixedly connected to the inner wall of the mounting groove and the outer side of the presser foot by screws. A bolt is threadedly connected to the upper part of the presser foot near the contact element, and the lower part of the bolt contacts the outer side of the contact element. An anti-slip groove is provided on the upper part of the cutting blade, and the lower side of the contact element contacts the outer side of the anti-slip groove. The right side of the cutting blade is provided as a cutting part, and the cutting part of the cutting blade extends to the left rear end of the guide groove.

[0007] As a further description of the above technical solution: The adjustment assembly includes a positioning component and a base. The positioning component is fixedly connected to the left side of the mounting component a. The base is fixedly connected to the upper right side of the presser foot component. A hollow fixed column is fixedly connected to the upper part of the base. A movable component is slidably connected to the inner wall of the fixed column. An operating part is fixedly connected to the upper part of the movable component. The movable component and the fixed column are elastically connected by a spring. A guide component is movably disposed on the outer arc surface of the fixed column. The rear side of the guide component is inserted into the inner wall of the positioning component.

[0008] As a further description of the above technical solution: The middle section of the guide is arc-shaped, and the arc of the guide is the same as that of the guide groove. The right side of the guide is cylindrical, and the cylindrical part of the guide is sleeved on the outside of the fixing post.

[0009] As a further description of the above technical solution: Both the presser foot and the lower front part of the distribution plate are designed to be arc-shaped.

[0010] As a further description of the above technical solution: The contact element is configured in an L-shape.

[0011] As a further description of the above technical solution: The lower diameter of the moving part is larger than the upper diameter.

[0012] This utility model has the following beneficial effects: 1. In this utility model, by adjusting the components, guiding grooves and guiding parts in coordination and using the cutting and positioning components, the edge of the fabric forms a tightly fitted inward roll structure, which completely wraps the spandex fibers inside the fabric inside the folded layer, avoiding the spandex fibers from breaking or bursting due to excessive local stress. This solves the problem of spandex burrs in the edge-locking process of elastic fabrics and significantly improves the durability and quality stability of the finished product.

[0013] 2. In this utility model, the cutting positioning component is fitted with an L-shaped contact and a bolt to tightly fit the anti-slip groove of the cutting blade, preventing the blade from sliding and shifting during operation, and indirectly avoiding weak points in the inward-rolled edge due to cutting deviation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model; Figure 2 This is a left-side view of the three-dimensional structure of the overall device in this utility model; Figure 3 This is a three-dimensional structural disassembly diagram of the cutting and positioning component in this utility model; Figure 4 This is a three-dimensional structural disassembly diagram of the adjustment component in this utility model.

[0015] Legend: 1. Presser foot; 2. Through groove; 3. Mounting part a; 4. Mounting part b; 5. Distribution plate; 6. Guide groove; 7. Cutting positioning assembly; 71. Mounting groove; 72. Contact part; 73. Bolt; 74. Cutting blade; 75. Anti-slip groove; 8. Guide part; 9. Adjustment assembly; 91. Positioning part; 92. Base; 93. Fixed column; 94. Moving part; 95. Operating part; 96. Spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figure 1 - Figure 3This utility model provides an embodiment of an explosion-proof overlock device, including a presser foot 1 that directly contacts the fabric to press and feed the material, ensuring processing stability. A through groove 2 is provided on the upper middle part of the presser foot 1, allowing components such as the needle bar and sewing thread of the overlock machine to pass through, avoiding interference with the presser foot 1 and ensuring smooth overlocking. An mounting piece a3 is fixedly connected to the upper rear side of the presser foot 1 near the through groove 2, used to connect and fix the positioning piece 91 of the adjusting assembly 9, achieving rear-side limiting of the guide piece 8. An mounting piece b4 is fixedly connected to the upper rear side of the presser foot 1, cooperating with the mounting piece a3 to install and fix the entire device on the overlock machine, ensuring the stability of the device during operation. The front side of the presser foot 1 is forked, providing mounting space for the guide groove 6 and the distribution plate 5. The space facilitates fabric diversion and guidance. The front fork of the presser foot 1 has an arc-shaped guide groove 6 extending to the left rear, which is the core guide channel for fabric folding. The arc-shaped trajectory guides the fabric edge to fold precisely, ensuring consistent folding curvature. A distribution plate 5 is fixedly connected to the lower part of the middle of the fork of the presser foot 1 to divert and limit the fabric, and assist the fabric in conforming to the guide groove 6. A cutting and positioning component 7 is fixedly connected to the left end of the presser foot 1 near the guide groove 6, which simultaneously completes the cutting of excess fabric edges and blade positioning, ensuring cutting accuracy. A guide component 8 is rotatably connected to the right side of the presser foot 1 through the adjustment component 9, which cooperates with the guide groove 6 to form a guide space. The fabric can automatically form a tightly fitting inward roll structure. The guide component 8 is located on the upper part of the right edge of the guide groove 6.

[0018] Reference Figure 2 - Figure 4 The cutting positioning component 7 includes a mounting groove 71 for accommodating and mounting the cutting blade 74, providing a stable mounting space for the blade. The mounting groove 71 is located on the left side of the presser foot 1 and at the left end of the guide groove 6. The cutting blade 74 is inserted into the inner wall of the mounting groove 71 to trim excess edges after fabric folding, resulting in neat edges. A contact member 72 is fixedly connected to the inner wall of the mounting groove 71 and the outer side of the presser foot 1 by screws. This contact member 72, in conjunction with the anti-slip groove 75, restricts the movement of the cutting blade 74, enhancing the stability of the blade. The contact member 72 is L-shaped to fit the mounting groove 71 and the mounting position of the cutting blade 74, balancing the fixing effect with the ease of installation. The presser foot 1 is threaded with a bolt 73 near the upper part of the contact 72. By tightening, pressure is applied to push the contact 72 to fit tightly against the cutting blade 74, strengthening the fixing effect. The lower part of the bolt 73 contacts the outside of the contact 72. The upper part of the cutting blade 74 is provided with an anti-slip groove 75 to increase the friction with the contact 72 and prevent the cutting blade 74 from sliding or shifting during operation. The lower side of the contact 72 contacts the outside of the anti-slip groove 75. The right side of the cutting blade 74 is set as the cutting part, and the cutting part of the cutting blade 74 extends to the left rear end of the guide groove 6 to ensure that after the fabric is folded, the excess edge can be cut in time, realizing the simultaneous folding and cutting.

[0019] Reference Figure 1 , Figure 3 and Figure 4 The adjusting assembly 9 includes a positioning element 91 and a base 92. The positioning element 91 is fixedly connected to the left side of the mounting element a3, providing an insertion positioning point for the rear side of the guide element 8 and limiting the rotation range of the guide element 8. The base 92 is fixedly connected to the upper right side of the pressure foot element 1, used to fix and support the fixing column 93, providing an installation base for the adjusting assembly 9. A hollow fixing column 93 is fixedly connected to the upper part of the base 92, providing sliding space for the moving element 94 and serving as the rotation axis of the guide element 8. The moving element 94 is slidably connected to the inner wall of the fixing column 93, and the guide element 94 is controlled by sliding up and down. The locking and unlocking of component 8 is achieved by having a lower diameter greater than an upper diameter for the moving component 94, preventing it from detaching from the inner wall of the fixed post 93 and ensuring structural stability. An operating part 95 is fixedly connected to the upper part of the moving component 94 for manual operation, facilitating the pulling up and down of the moving component 94. The moving component 94 and the fixed post 93 are elastically connected by a spring 96, providing a restoring force for the moving component 94 and ensuring that the moving component 94 presses against the guide component 8 under normal conditions, thus achieving locking. The guide component 8 is movably disposed on the outer arc surface of the fixed post 93, and the rear side of the guide component 8 is inserted into the inner wall of the positioning component 91.

[0020] Reference Figure 1 - Figure 3 The middle section of the guide member 8 is arc-shaped, and the arc of the guide member 8 is the same as that of the guide groove 6, ensuring that it cooperates with the guide groove 6 to form a smooth guide channel and conform to the fabric folding trajectory. The right side of the guide member 8 is cylindrical, and the cylindrical part of the guide member 8 is sleeved on the outside of the fixed column 93, so that the guide member 8 can rotate around the fixed column 93. The lower front part of the pressure foot 1 and the distribution plate 5 are both arc-shaped to reduce the frictional resistance with the fabric, avoid jamming and wear during fabric conveying, and ensure smooth fabric feeding.

[0021] Working principle: Before use, the entire device is fixed to the corresponding position of the overlock machine using mounting parts a3 and b4. Pull the operating part 95 of the adjusting component 9 upward, which drives the moving part 94 to slide upward in the fixed column 93 and compress the spring 96. At this time, the guide part 8 is released from the fixed constraint and can rotate flexibly around the fixed column 93. Adjust the angle of the guide part 8 so that its arc section is completely in contact with the guide groove 6 of the presser foot part 1. Release the operating part 95, and the spring 96 returns to its original position, pushing the moving part 94 downward to press the guide part 8. At the same time, the rear side of the guide part 8 is precisely inserted into the positioning part 91 to form a closed and stable guide channel, which is ready for the automatic inward roll of the fabric.

[0022] After starting the overlock machine, the fabric containing spandex is fed in from the fork in front of the presser foot 1. The distribution plate 5 acts as a diversion and limiting device, precisely guiding the edge of the fabric into the guide groove 6. When the fabric is fed to the end of the guide groove 6, the cutting part of the cutting blade 74 extends to the left side of the rear end of the guide groove 6, precisely cutting off the excess edge after the fabric is rolled inward, making the folded edge neat and tidy. At the same time, under the combined action of the traction force of the overlock machine's feeding mechanism and the arc-shaped constraint force of the guide groove 6 and the guide 8, the edge of the fabric is forced to curl inward along the arc-shaped trajectory. This process does not require manual assistance in folding the edge, and the fabric can automatically form a tightly fitted inward curl structure, completely wrapping the internal spandex fibers in the folded layer, preventing the spandex from being exposed.

[0023] Under the pressure of the bolt 73, the L-shaped contact 72 fits tightly against the anti-slip groove 75 on the upper part of the cutting blade 74, effectively preventing the cutting blade 74 from sliding and shifting during high-speed processing, ensuring cutting accuracy, and indirectly avoiding weak points in the inward curl edge due to cutting deviation, further consolidating the wrapping effect of the spandex.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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. An explosion-proof crotch locking device, characterized in that: The device includes a presser foot (1), a through groove (2) is provided on the upper middle part of the presser foot (1), an mounting part a (3) is fixedly connected to the rear side of the upper part of the presser foot (1) near the through groove (2), an mounting part b (4) is fixedly connected to the rear side of the upper part of the presser foot (1), the front side of the presser foot (1) is bifurcated, a guide groove (6) is provided in an arc shape to the left rear side of the bifurcation of the front side of the presser foot (1), a distribution plate (5) is fixedly connected to the lower side of the middle part of the bifurcation of the presser foot (1), a cutting positioning component (7) is fixedly connected to the end of the left side of the presser foot (1) near the guide groove (6), and a guide part (8) is rotatably connected to the right side of the presser foot (1) through an adjustment component (9), and the guide part (8) is located on the upper part of the right edge of the guide groove (6).

2. The explosion-proof crotch locking device according to claim 1, characterized in that: The cutting positioning assembly (7) includes a mounting groove (71), which is located on the left side of the presser foot (1) and at the left end of the guide groove (6). A cutting blade (74) is inserted into the inner wall of the mounting groove (71). A contact (72) is fixedly connected to the outer side of the presser foot (1) by screws. A bolt (73) is threadedly connected to the upper part of the presser foot (1) near the contact (72). The lower part of the bolt (73) contacts the outer side of the contact (72). An anti-slip groove (75) is provided on the upper part of the cutting blade (74). The lower side of the contact (72) contacts the outer side of the anti-slip groove (75). The right side of the cutting blade (74) is set as a cutting part, and the cutting part of the cutting blade (74) extends to the left end of the guide groove (6).

3. The explosion-proof crotch locking device according to claim 1, characterized in that: The adjustment component (9) includes a positioning component (91) and a base (92). The positioning component (91) is fixedly connected to the left side of the mounting component a (3). The base (92) is fixedly connected to the upper right side of the presser foot component (1). A hollow fixed column (93) is fixedly connected to the upper part of the base (92). A movable component (94) is slidably connected to the inner wall of the fixed column (93). An operating part (95) is fixedly connected to the upper part of the movable component (94). The movable component (94) and the fixed column (93) are elastically connected by a spring (96). The guide component (8) is movably disposed on the outer arc surface of the fixed column (93). The rear side of the guide component (8) is inserted into the inner wall of the positioning component (91).

4. The explosion-proof crotch locking device according to claim 1, characterized in that: The middle section of the guide (8) is set in an arc shape. The arc of the guide (8) is the same as that of the guide groove (6). The right side of the guide (8) is set in a cylindrical shape. The cylindrical part of the guide (8) is sleeved on the outside of the fixed column (93).

5. The explosion-proof crotch locking device according to claim 1, characterized in that: The lower front part of both the presser foot (1) and the distribution plate (5) is arc-shaped.

6. The explosion-proof crotch locking device according to claim 2, characterized in that: The contact element (72) is configured in an L shape.

7. The explosion-proof crotch locking device according to claim 3, characterized in that: The lower diameter of the moving part (94) is larger than the upper diameter.

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