Cloth pressing device of sewing machine
By designing a sewing machine pressing device for adjusting components and pressing components in a sewing machine, the problem that the prior art cannot adapt to sewing materials of different thicknesses and sizes is solved, and the effect of automatic tensioning and efficient sewing is achieved to avoid wrinkles of the sewing materials.
Patent Information
- Application Number
- CN202323547686.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-26
AI Technical Summary
The pressing devices of existing sewing machines cannot adapt to sewing materials of different thicknesses and sizes, resulting in manual compression steps increasing working strength and possible problems of sewing materials wrinkles.
A sewing machine pressing device including adjustment components and pressing components is designed. The height of the pressing roller and the spring is automatically compressed by a screw to adapt to fabrics of different thicknesses, and the spacing between pressing rollers is adjusted by the adjustment components to adapt to sewing materials of different sizes.
It realizes automatic tensioning without manual compression, suitable for seam materials of different thicknesses and sizes, avoids seam pleats, and improves sewing quality and convenience of use.
Smart Images
Figure CN222251284U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewing machines, and more specifically, to a thread-breaking prevention device for sewing machines. Background Art
[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing materials are interwoven or sewn together. The sewing machine can sew fabrics such as cotton, linen, silk, wool, and synthetic fibers, and products such as leather, plastic, and paper. The stitches are neat, beautiful, flat, and firm, and the sewing speed is fast and easy to use.
[0003] When a sewing machine is in use, it is usually necessary to flatten and tension the sewing material to prevent processing when the sewing material is wrinkled, which affects the quality of sewing. In the prior art, the cloth is mostly flattened and tensioned manually, but this method increases the workload of workers, and manual tensioning of the sewing material may cause slippage and wrinkles. Chinese patent application number CN202222666829.8 discloses a cloth pressing and positioning device for a sewing machine, including a workbench and a sewing machine body. The sewing material is tensioned by a pressing roller that can automatically move up and down, and there is no need for manual tensioning of the sewing material. However, the spacing between the pressing rollers is fixed, and it is only suitable for cloth of a specific size. Once the length of the cloth is less than the spacing between the two pressing rollers, the cloth cannot be pressed, and its applicability is low. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model aims to provide a cloth pressing device suitable for sewing materials of various thicknesses and sizes, so that the cloth can be kept at a tension level that is convenient for sewing machine processing.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A cloth pressing device for a sewing machine comprises a workbench and a sewing machine head, which is fixed on the workbench and is characterized in that an adjusting component is provided on the sewing machine head, the adjusting component comprises a fixed frame, a movable seat, a screw, a lead screw and a guide rod, the fixed frame is fixed on the sewing machine head, the fixed frame is a rectangular frame, the movable seat is placed in the fixed frame and is slidably connected to the fixed block, a threaded hole for the screw to extend into is provided on the top of the fixed frame, the screw passes through the threaded hole and is fixedly connected to the movable seat, two corresponding through grooves are respectively provided on both sides of the fixed frame, the lead screw and the guide rod respectively pass through the through grooves on both sides of the fixed frame and are movably connected to the through grooves, and two groups of cloth pressing components are also provided on the sewing machine head, and the two groups of cloth pressing components are placed at both ends of the fixed frame along the moving direction of cloth sewing.
[0007] It is further configured that the cloth pressing assembly includes a connecting block, a connecting rod, a guide sleeve, a spring, a pressure roller, a U-shaped frame and a transverse axis, the connecting block is provided with screw holes and through holes matching the screw rod and the guide rod, the connecting block is threadedly connected to the screw rod, the connecting block is slidingly connected to the guide rod, the guide sleeve is fixed on the U-shaped frame, the spring is placed in the guide sleeve, the connecting rod is L-shaped, one end of the connecting rod is fixedly connected to the connecting block, the other end of the connecting rod extends into the guide sleeve and abuts against the top of the spring, the U-shaped frame is provided with a space for the pressure roller to be accommodated, the transverse axis passes through the pressure roller and is fixedly connected to the U-shaped frame, and the pressure roller is rotatably connected to the transverse axis.
[0008] It is further configured that the screw rod is provided with a positive thread segment and a negative thread segment, a smooth segment is provided between the positive thread segment and the negative thread segment, and the connecting blocks of the two sets of cloth pressing assemblies are respectively placed on the positive thread segment and the negative thread segment.
[0009] It is further configured that a surface of the movable seat corresponding to the sewing machine head is arc-shaped, and the arc-shaped surface of the movable seat is adapted to the side wall of the sewing machine head.
[0010] By adopting the above technical scheme, the beneficial effects of the utility model are as follows: by setting a cloth pressing assembly, the cloth is pressed tightly, eliminating the step of manual pressing, and the height of the pressing roller can be adjusted by a screw rod to suit cloths of different thicknesses; a spring is set in the cloth pressing assembly, and when the cloth thickness does not change much, there is no need to adjust the screw rod to raise and lower the cloth pressing assembly, and the spring can be automatically compressed to a degree that adapts to the distance between the pressing roller and the sewing material; an adjusting assembly is set between the two sets of cloth pressing assemblies, and the spacing between the two pressing rollers can be adjusted, so that the cloth can be pressed according to sewing materials of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the overall structure of the cloth pressing device according to an embodiment of the utility model.
[0012] Figure 2 It is a side structural schematic diagram of the cloth pressing device according to an embodiment of the utility model.
[0013] Figure 3 It is a schematic diagram of the side sectional structure of the cloth pressing device according to an embodiment of the utility model.
[0014] Figure numerals: 1 workbench, 2 sewing machine head, 3 fixed frame, 31 through slot, 4 screw, 5 lead screw, 51 positive thread segment, 52 negative thread segment, 6 guide rod, 7 moving seat, 8 connecting block, 9 connecting rod, 10 guide sleeve, 11 spring, 12 pressure roller, 13 U-frame, 14 horizontal axis. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0016] Reference Figures 1 to 3 The utility model is further described in detail.
[0017] A cloth pressing device for a sewing machine comprises a workbench 1 and a sewing head 2, the sewing head 2 being fixed on the workbench 1, and characterized in that an adjustment component is provided on the side of the sewing head 2, the adjustment component comprises a fixed frame 3, a screw 4, a lead screw 5, a guide rod 6 and a movable seat 7, the fixed frame 3 is fixed on the sewing head 2, the fixed frame 3 is a rectangular frame, the space enclosed by the fixed frame 3 is for the movable seat 7 to be placed, the movable seat is placed in the fixed frame 3 and is slidably connected with the fixed frame 3, a surface of the movable seat 7 corresponding to the sewing head 2 is arc-shaped, and a receiving space is provided on the movable seat 7 for the side wall of the sewing head 2 to be accommodated, so that the arc-shaped surface is adapted to the side wall of the sewing head 2 when the movable seat 7 moves up and down.
[0018] The screw rod 5 and the guide rod 6 pass through the side of the movable seat 7 and are parallel to each other. Two corresponding through grooves 31 are respectively provided on both sides of the fixed frame 3. The two ends of the screw rod 5 and the two ends of the guide rod 6 respectively pass through the two through grooves 31 on both sides of the fixed frame 3 and are movably connected with the through grooves 31. A positive thread section 51 and a negative thread section 52 are provided on the screw rod 5. A smooth section without threads is provided between the positive thread section 51 and the negative thread section 52. The smooth section is placed in the movable seat 7. A threaded hole for the screw rod 4 to extend into is provided on the top of the fixed frame 3. The screw rod 4 extends into the threaded hole and the bottom end of the screw rod 4 is fixedly connected to the movable seat 7. The movable seat 7 is moved up and down by setting an adjusting component, so that the two sets of clamping components connected to the movable seat 7 can also move up and down. It is suitable for sewing fabrics of different thicknesses and can facilitate the placement and removal of sewing materials.
[0019] Two sets of cloth pressing assemblies are arranged on the sewing machine head 2, and the cloth pressing assemblies are arranged on both sides of the fixed frame along the moving direction of the cloth when the sewing machine is working. The cloth pressing assemblies include a connecting block 8, a connecting rod 9, a guide sleeve 10, a spring 11, a pressing roller 12, a U-shaped frame 13 and a transverse shaft 14. The connecting block 8 is provided with screw holes and through holes matching the screw rod 5 and the guide rod 6. The connecting blocks 8 of the two sets of cloth pressing assemblies are respectively placed on the positive thread segment 51 and the negative thread segment 52 of the screw rod. The guide sleeve 10 is fixed on the U-shaped frame, and the spring 11 is placed in the guide sleeve. The connecting rod 9 is L-shaped, and one end of the connecting rod 9 is fixedly connected to the side end of the connecting block 8, and the other end of the connecting rod extends into the guide sleeve 10 and is connected to the spring 11 The top of the U-shaped frame 13 is abutted, and a space for the pressure roller 12 is provided on the U-shaped frame 13. The transverse axis 14 passes through the pressure roller 12 and is placed in the space of the U-shaped frame 13 and is fixedly connected to the U-shaped frame 13. The pressure roller 12 is rotatably connected to the transverse axis 14. The two pressure rollers 12 are placed on the positive thread segment 51 and the negative thread segment 52 of the screw rod 5 through the connecting block 8. The screw rod 5 can be rotated to make the pressure rollers 12 move relatively, which is convenient for adjusting the spacing of the pressure rollers 12. Compared with the pressure rollers with fixed spacing, the application range is wider, and the spring 11 is placed in the guide sleeve 10. The connected guide rod 6 can compress the spring 11 to adapt to the distance between the pressure roller 12 and the sewing material, thereby realizing automatic height adjustment of the pressure roller 12 to a certain extent.
[0020] When the utility model is used, the cloth to be sewn is first placed on the workbench 1, and the screw rod 4 is rotated according to the thickness of the sewing material, so that the movable seat 7 connected to the screw rod 4 moves downward and stops when the pressure roller 12 abuts against the sewing material, and then the screw rod 5 is rotated according to the length of the sewing material, and the connecting blocks respectively placed on the positive thread end and the negative thread section of the screw rod move relatively, so that the distance between the two pressure rollers 12 is smaller than the length of the sewing material, so as to avoid the pressure roller 12 being empty and ensure that the pressure roller 12 can flatten the sewing material. When the sewing machine is processing, the sewn cloth The material keeps moving forward, and the two pressing rollers 12 rotate along the moving direction of the sewing material to flatten the sewing material, so as to avoid wrinkles at the sewing part and the periphery of the sewing material and ensure the sewing quality. When the thickness of the sewn fabric is not much different, there is no need to adjust the top screw 4 to adjust the height of the movable seat 7 and the pressing roller 12. The connecting rod extending into the guide sleeve 10 squeezes the spring 11 to automatically adjust the distance between the pressing roller 12 and the sewing material, and also avoids the sewing material from being embossed due to improper height adjustment and the pressing roller 12 being too tight against the sewing material, so the applicability is good.
[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any common changes and substitutions made by those skilled in the art within the technical solution of the present invention should be included in the protection scope of the present invention.
Claims
1. A cloth pressing device for a sewing machine, comprising a workbench and a sewing machine head, wherein the sewing machine head is fixed on the workbench, and characterized in that: The sewing machine head is provided with an adjustment component, which includes a fixed frame, a movable seat, a screw, a lead screw and a guide rod. The fixed frame is fixed to the sewing machine head. The fixed frame is a rectangular frame. The movable seat is placed in the fixed frame and is slidably connected to the fixed block. A threaded hole for the screw to extend into is provided on the top of the fixed frame. The screw passes through the threaded hole and is fixedly connected to the movable seat. Two corresponding through grooves are respectively provided on both sides of the fixed frame. The lead screw and the guide rod respectively pass through the through grooves on both sides of the fixed frame and are movably connected to the through grooves. The sewing machine head is also provided with two sets of cloth pressing assemblies, which are arranged at two ends of the fixed frame along the moving direction of cloth sewing.
2. A cloth pressing device for a sewing machine according to claim 1, characterized in that: The cloth pressing assembly includes a connecting block, a connecting rod, a guide sleeve, a spring, a pressure roller, a U-shaped frame and a transverse axis. The connecting block is provided with screw holes and through holes matching the screw rod and the guide rod. The connecting block is threadedly connected to the screw rod, the connecting block is slidably connected to the guide rod, the guide sleeve is fixed on the U-shaped frame, and the spring is placed in the guide sleeve. The connecting rod is L-shaped, one end of the connecting rod is fixedly connected to the connecting block, and the other end of the connecting rod extends into the guide sleeve and abuts against the top of the spring. The U-shaped frame is provided with a space for the pressure roller to be accommodated, the transverse axis passes through the pressure roller and is fixedly connected to the U-shaped frame, and the pressure roller is rotatably connected to the transverse axis.
3. A cloth pressing device for a sewing machine according to claim 1, characterized in that: The screw rod is provided with a positive thread segment and a negative thread segment, a smooth segment is provided between the positive thread segment and the negative thread segment, and the connecting blocks of the two sets of cloth pressing components are respectively placed on the positive thread segment and the negative thread segment.
4. A cloth pressing device for a sewing machine according to claim 1, characterized in that: The movable seat has a surface corresponding to the sewing machine head in an arc shape, and the arc surface of the movable seat is matched with the side wall of the sewing machine head.