Positioning device for sewing machine to sew fabric

Abstract

The utility model discloses a positioning device for sewing fabric of sewing machine, is used to solve the problem that cloth is difficult to be positioned and fixed quickly in the industrial sewing process. Among them, the sewing machine head is installed on the mounting platform and has sewing action, the two -dimensional space cross slide platform subassembly is installed on the mounting platform and has the feeding action on the transverse and longitudinal, and cloth clamping plate subassembly includes bottom lining plate and clamping plate, and the bottom lining plate is fixedly connected on the angle iron, and the clamping plate is movably connected the angle iron through the hinged joint hinge, and the strong magnet block that absorbs each other is arranged on the bottom lining plate and clamping plate respectively, and the rectangular window that provides sewing operation area for the cloth held by the pair is arranged in the bottom lining plate and clamping plate. The device can conveniently clamp the fabric through the design of cloth clamping plate subassembly, and the quick release design is carried out by using the strong magnet block, the quick clamping of cloth is realized, and the cloth is kept in the open flat state.

Description

Technical Field

[0001] This utility model relates to the technical field of positioning devices for sewing fabrics in sewing machines, and belongs to an auxiliary mechanism for sewing work. Background Technology

[0002] In industrialized sewing processes, the fixing and positioning of fabric are crucial to the sewing effect. In traditional hand sewing, the skilled operation of industrial workers can ensure the sewing effect, such as ensuring the accuracy of the sewing path and the uniformity of the stitch spacing. Another approach is to use temporary machine sewing aids, such as a fabric clamp specifically designed for temporary fabric fixing, to assist in the positioning of the fabric. For example, Chinese patent document CN203692641U discloses a sewing auxiliary clamp and device. This sewing auxiliary clamp includes a fixed plate connected to a sewing machine, a pair of lifting mechanisms connected to the fixed plate, an adjusting mechanism corresponding to each lifting mechanism, and a positioning mechanism corresponding to each adjusting mechanism. Each positioning mechanism has a friction step block that can move horizontally, and multiple pressure blocks detachably connected to the friction step block. This allows for excellent positioning of sewn fabric pieces or garments, improving product yield. Therefore, machine sewing auxiliary tools can indeed improve industrial efficiency and industrial standards. However, in the actual industrial production, each factory's products and equipment are not the same. This technology is a special auxiliary tooling designed for the actual production use of this unit. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a positioning device for sewing fabrics in sewing machines, which solves the problem of the difficulty in quickly positioning and fixing fabrics during industrial sewing processes.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A positioning device for sewing fabric in a sewing machine, characterized in that it comprises a mounting platform, a two-dimensional spatial cross slide assembly, a sewing machine head, and a fabric clamping plate assembly, wherein: the sewing machine head is mounted on the mounting platform and has sewing action; the two-dimensional spatial cross slide assembly is mounted on the mounting platform and has lateral and longitudinal feeding action, and has an angle iron for mounting in the two-dimensional spatial cross slide assembly; the fabric clamping plate assembly includes a base plate and a clamping plate, wherein the base plate is fixedly connected to the angle iron, the clamping plate is movably connected to the angle iron through a hinge, and strong magnetic blocks that attract each other are respectively provided on the base plate and the clamping plate, and rectangular windows that provide a sewing operation area for the clamped fabric are provided in the base plate and the clamping plate.

[0005] The strong magnetic blocks are arranged in pairs and embedded in the base plate and the clamping plate respectively.

[0006] The clamp is equipped with an operating handle, which can be used to adjust the angle of the clamp, thereby enabling the picking up and placing of fabric and adjusting its position.

[0007] The clamping surfaces of the clamping plate and the bottom liner are provided with an embossed texture to improve clamping force.

[0008] The clamping surfaces of the clamping plates and the bottom liner are provided with a rubber composite layer.

[0009] The two-dimensional spatial cross slide assembly includes, in the longitudinal direction, a first linear guide rail, a first slider, a first synchronous belt mechanism, and a first servo motor. Two first linear guide rails and the first synchronous belt mechanism are mounted on the mounting platform and mechanically connected to the crossbeam via the first slider and a first clamp. The first servo motor is mechanically connected to the first synchronous belt mechanism and drives the crossbeam to feed longitudinally. In the transverse direction, it includes a second linear guide rail, a second slider, a second synchronous belt mechanism, and a second servo motor. The second synchronous belt mechanism and the second servo motor form a drive structure and are mounted inside the crossbeam. A groove is provided on the crossbeam, and a second linear guide rail is mounted on the outside of the groove. The second slider is slidably mounted on the second linear guide rail and mechanically connected to the second synchronous belt mechanism using a second clamp. The angle iron is mechanically connected to the second slider via a cover plate.

[0010] The crossbeam is a hollow shell structure with a C-shaped cross-section.

[0011] The bottom liner and the clamping plate are thin sheets of stainless steel.

[0012] The beneficial effects of this invention are as follows: The device, through the design of the fabric clamping plate assembly, can conveniently clamp fabric and utilizes a strong magnetic block for quick release, enabling rapid fabric clamping and maintaining the fabric in an open, flat state. The use of a two-dimensional spatial cross slide assembly allows the fabric clamped by the fabric clamping plate assembly to move in both horizontal and vertical two-dimensional space, coordinating with the sewing action of the sewing machine head to ensure accurate stitching and splicing positions. The specific effects and functions of this invention will be further explained in detail in the embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention.

[0014] Figure 2 This is a top view of the present invention, with arrows indicating the direction of movement in two-dimensional space.

[0015] Figure 3 for Figure 1 Enlarged view of a portion of point A in the middle.

[0016] Figure 4 for Figure 2 Sectional view B-B.

[0017] Figure 5 for Figure 2 C-C section view.

[0018] Figure 6 This is a cross-sectional view of the fabric clamping plate assembly, showing the clamping state.

[0019] Figure 7 This is a cross-sectional view of the fabric clamp assembly, showing its open state.

[0020] Figure 8 This is a structural diagram of the clamping plate.

[0021] Figure 9 This is a structural diagram of the bottom liner.

[0022] In the picture: 100. Mounting platform; 110. Mounting slot; 200. Two-dimensional space cross slide assembly; 210. First linear guide rail; 220. First slider; 230. First synchronous belt mechanism; 231. First clamp; 240. First servo motor; 250. Second linear guide rail; 260. Second slider; 270. Second synchronous belt mechanism; 271. Second clamp; 280. Second servo motor; 300. Sewing machine head; 400. Crossbeam; 410. Motor mounting housing; 420. Cover plate; 430. Angle iron; 500. Fabric clamp assembly; 510. Base plate; 520. Hinge; 530. Clamp plate; 531. Operating handle; 540. Rectangular window; 550. Strong magnet; 600. Fabric. Detailed Implementation

[0023] This embodiment will be described in conjunction with the appendix to the instruction manual. Figure 1 To be continued Figure 9 This paper details a positioning device for sewing fabrics in a sewing machine. This device assists in positioning and temporarily securing the fabric to be sewn, such as cloth 600 or non-woven fabric, keeping the cloth 600 in an open, flat state. It also allows for movement in two-dimensional space (horizontal and vertical) to coordinate with the sewing action of the sewing machine head 300, ensuring that seams and seams are in the correct positions, guaranteeing the accuracy of the finished product's dimensions and shape. The device has excellent fixing performance, preventing relative slippage between layers of cloth 600 during sewing, thus avoiding wrinkles and skewing.

[0024] The device includes a mounting platform 100, a two-dimensional spatial cross slide assembly 200 and a sewing machine head 300 mounted on the mounting platform 100, and a fabric clamping plate assembly 500 mounted on the two-dimensional spatial cross slide assembly 200. The two-dimensional spatial cross slide assembly 200 is located directly below the sewing machine head 300 and has precise movement capabilities in both the horizontal and vertical directions. It uses a servo motor in conjunction with a synchronous belt motion mechanism and a linear sliding mechanism for precise position control, achieving precise feed within two-dimensional space. The sewing machine head 300 is used for sewing actions and has a sewing needle. This sewing machine head 300 is an industrial sewing module; its specific structure and working principle will not be described in detail.

[0025] Define the horizontal and vertical directions, refer to Figure 1 The length direction along the sewing machine head 300 is defined as longitudinal. Figure 1 Using the Y-axis, the direction perpendicular to the sewing machine head 300 is defined as the horizontal direction. Figure 1 The X-axis is used for representation.

[0026] A mounting slot 110 for mounting linear guide rails is provided on each of the left and right sides of the aforementioned mounting platform 100.

[0027] The two-dimensional spatial cross slide assembly 200, in the longitudinal direction, includes a first linear guide rail 210, a first slider 220, a first synchronous belt mechanism 230, and a first servo motor 240. There are two first linear guide rails 210, arranged one on the left and one on the right, with their length direction along the longitudinal direction. They are installed in the mounting slot 110 of the mounting platform 100, and the first sliders 220 are mounted on the first linear guide rails 210. A crossbeam 400 is overlapped and fixedly mounted on the two first sliders 220. Two synchronous pulleys in the first synchronous belt mechanism 230 are installed inside the mounting platform 100, and one of the synchronous pulleys is mechanically connected to and driven by the first servo motor 240. A first clamp 231 is fixedly mounted on the synchronous belt, and the first clamp 231 is also fixedly connected to the crossbeam 400. Driven by the first servo motor 240, the crossbeam 400 is fed longitudinally, realizing the change of coordinates in the longitudinal direction.

[0028] In the horizontal direction, the two-dimensional spatial cross slide assembly 200 includes a crossbeam 400, a second linear guide rail 250, a second slider 260, a second synchronous belt mechanism 270, and a second servo motor 280. The crossbeam 400 is a hollow shell structure with a C-shaped cross-section. A synchronous belt, synchronous pulley, and reversing pulley are installed inside the crossbeam 400. A protruding motor mounting housing 410 is installed in the middle section of the crossbeam 400, and a second servo motor 280 is installed inside the motor mounting housing 410. The second servo motor 280 is mechanically connected to one of the synchronous pulleys and drives the synchronous belt to rotate, thus driving it. The crossbeam 400 has a sliding groove, and the second linear guide rail 250 is installed on the outside of the sliding groove. The second linear guide rail 250 is fixed to the side of the crossbeam 400, fixedly connected, and arranged along the length of the crossbeam 400. The second slider 260 is slidably mounted on the second linear guide 250, and is fixedly connected to the synchronous belt inside the crossbeam 400 using a second clamp 271. The synchronous belt drives the second slider 260 to slide. There are two second sliders 260, and a cover plate 420 is fixedly installed between them, providing installation space for the fabric clamp assembly 500. The cover plate 420 is snapped and fixed to the outside of the second sliders 260. An L-shaped angle iron 430 is fixedly installed on the cover plate 420, with its vertical part fixedly connected to the cover plate 420. A bottom liner 510 and three hinged hinges 520 are fixedly connected to the horizontal part of the angle iron 430. The bottom liner 510 is fixedly connected to the horizontal part of the angle iron 430 by welding or riveting. It also includes a clamping plate 530, which is hinged to the horizontal part of the angle iron 430 via a hinged hinge 520, and forms a clamping effect on the fabric 600 on the bottom liner 510 during the opening and closing of the clamping plate 530.

[0029] In this embodiment, the bottom liner 510 and the clamping plate 530 are thin plates made of stainless steel. The two clamp each other to form a clamping space for the fabric 600, and together they form the fabric clamping plate assembly 500.

[0030] Further, preferably, the base plate 510 and the clamping plate 530 have rectangular windows 540, and strong magnetic blocks 550 are provided on the edges of the base plate 510 and the clamping plate 530 of the rectangular window 540. The strong magnetic blocks 550 are embedded in the base plate 510 and the clamping plate 530, and the magnetic poles of the strong magnetic blocks 550 in the base plate 510 and the clamping plate 530 are arranged oppositely and attract each other. That is, the clamping plate 530 is fastened to the base plate 510 through the hinged joint 520 to achieve the clamping of the fabric 600. After clamping, the fabric 600 is clamped between the two plates to prevent the fabric 600 from sliding relative to each other during the sewing process and to avoid wrinkles and skewing.

[0031] During the sewing process, the rectangular window 540 feeds horizontally and vertically at the sewing needle position in the sewing machine head 300, realizing two-dimensional space movement in the plane, thereby realizing the sewing of the fabric 600 in the clamping and positioning state. With the help of programming, it can realize the splicing and sewing of complex patterns.

[0032] Furthermore, an operating handle 531 is provided on the aforementioned clamping plate 530. This handle is U-shaped and is used to raise and lower the clamping plate 530. Specifically, by operating this handle, the angle of the clamping plate 530 can be rotated, allowing the fabric 600 to be picked up, placed, and its position adjusted. This is a commonly used handle.

[0033] Furthermore, the clamping surfaces of the aforementioned clamping plate 530 and bottom liner 510 are provided with embossed concave-convex structures or rubber composite layers to improve the clamping force on the fabric 600.

Claims

1. A positioning device for sewing fabric in a sewing machine, characterized in that: The assembly includes a mounting platform (100), a two-dimensional space cross slide assembly (200), a sewing machine head (300), and a fabric clamp assembly (500), wherein: the sewing machine head (300) is mounted on the mounting platform (100) and has sewing action; the two-dimensional space cross slide assembly (200) is mounted on the mounting platform (100) and has lateral and longitudinal feed action, and the two-dimensional space cross slide assembly (200) has an angle iron (430) for mounting; the fabric clamp assembly... The component (500) includes a base plate (510) and a clamping plate (530), wherein the base plate is fixedly connected to an angle iron (430), and the clamping plate (530) is movably connected to the angle iron (430) via a hinged hinge (520). Strong magnetic blocks (550) that attract each other are respectively provided on the base plate (510) and the clamping plate (530), and rectangular windows (540) are provided in the base plate (510) and the clamping plate (530) to provide a sewing operation area for the clamped fabric.

2. The positioning device for sewing fabric in a sewing machine according to claim 1, characterized in that, The strong magnetic blocks (550) are arranged in pairs and respectively embedded in the bottom plate (510) and the clamping plate (530).

3. The positioning device for sewing fabric in a sewing machine according to claim 2, characterized in that, An operating handle is provided on the clamp (530).

4. The positioning device for sewing fabric in a sewing machine according to claim 3, characterized in that, The clamping surfaces of the clamping plate (530) and the bottom liner plate (510) are provided with embossed concave-convex structures.

5. The positioning device for sewing fabric in a sewing machine according to claim 3, characterized in that, The clamping surfaces of the clamping plate (530) and the bottom liner plate (510) are provided with a rubber composite layer.

6. The positioning device for sewing fabric in a sewing machine according to claim 1, characterized in that, The two-dimensional spatial cross slide assembly (200) includes, in the longitudinal direction, a first linear guide (210), a first slider (220), a first synchronous belt mechanism (230), and a first servo motor (240). The two first linear guides (210) and the first synchronous belt mechanism (230) are mounted on the mounting platform and mechanically connected to the crossbeam (400) via the first slider (220) and the first clamp (231). The first servo motor (240) is mechanically connected to the first synchronous belt mechanism (230) and drives the crossbeam (400) to feed longitudinally. In the transverse direction, it includes a second linear guide (250), a second slider... The structure consists of a block (260), a second synchronous belt mechanism (270), and a second servo motor (280). The second synchronous belt mechanism (270) and the second servo motor (280) form a drive structure and are installed inside a crossbeam. A slide groove is provided on the crossbeam (400), and a second linear guide rail (250) is installed on the outside of the slide groove. The second slider (260) is slidably installed on the second linear guide rail (250), and the second slider (260) and the second synchronous belt mechanism (270) are mechanically connected by a second clamp (271). The angle iron (430) is mechanically connected to the second slider (260) through a cover plate (420).

7. The positioning device for sewing fabric in a sewing machine according to claim 6, characterized in that, The crossbeam (400) is a hollow shell structure with a C-shaped cross-section.

8. The positioning device for sewing fabric in a sewing machine according to claim 1, characterized in that, The bottom liner (510) and the clamping plate (530) are stainless steel sheets.

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