Tuck press device and sewing apparatus using the same

Abstract

The application discloses a wrinkling presser foot device and sewing equipment adopting the same, relates to the field of sewing equipment, and proposes a wrinkling presser foot device, which comprises a presser board main body, a wrinkling groove is arranged on the presser board main body, and a wrinkling wheel is rotationally connected to the presser board main body; the wrinkling wheel is arranged in the wrinkling groove and protrudes downward from the wrinkling groove so as to contact the fabric. The application drives the wrinkling wheel to rotate through an external transmission mechanism, so that the fabric passing through the wrinkling groove contacts the wrinkling wheel to be wrinkled during the sewing process, the fabric is wrinkled / contracted, and the stitches are uniform.

Description

Technical Field

[0001] This invention relates to the field of sewing equipment technology, and particularly to a wrinkling presser foot device and sewing equipment using the same. Background Technology

[0002] Existing wrinkle-gathering / shrinking processes are widely used in garment sewing. However, most manual sewing wrinkle-gathering / shrinking processes currently use sewing equipment with differential tooth function. But the single differential function makes it easy for uneven stitches and unevenness of machine-cut fabric (such as overlock sewing machines) to occur in the wrinkle-gathering / shrinking process. Summary of the Invention

[0003] The main objective of this invention is to provide a wrinkle-shrinking presser foot device that makes the stitches uniform during the wrinkle-reducing / wrinkling process.

[0004] A secondary objective of this invention is to provide a sewing machine employing the aforementioned presser foot device.

[0005] The shrinking / shrunking process refers to a technique that creates a natural and rich texture by shrinking the fabric (folding or pinching the fabric together).

[0006] To achieve the above objectives, the present invention provides a crimping presser foot device, comprising:

[0007] The main body of the pressing board has wrinkling grooves.

[0008] The pleating roller is rotatably connected to the main body of the press plate. The pleating roller is set in the pleating groove and protrudes downward from the pleating groove to facilitate contact with the fabric.

[0009] This invention uses an external transmission mechanism to drive the pleating wheel to rotate, so that during the sewing process, the fabric passing through the pleating groove contacts the pleating wheel and wrinkles, thereby achieving a wrinkle-reducing / wrinkling effect on the sewn fabric. Compared to a single differential method, the wrinkle-reducing presser foot device of this invention, combined with a controllable external transmission mechanism, can achieve uniform stitches on sewn fabrics after the wrinkle-reducing / wrinkling process when applied to sewing equipment. Furthermore, the wrinkle-reducing presser foot device of this invention is applicable to various existing sewing equipment models, such as overlock machines, coverstitch machines, single-needle flatbed sewing machines, multi-needle sewing machines, and double-needle flatbed sewing machines.

[0010] The present invention also provides a sewing device employing the aforementioned pleating presser foot device, wherein the rotation axis of the pleating roller is perpendicular to the sewing path. This device possesses all the beneficial effects of the aforementioned pleating presser foot device. In use, the presser plate body is typically provided with a pleating groove along the sewing path after the needle entry position of the sewing device.

[0011] Preferably, the sewing equipment also includes a pleating wheel drive mechanism, wherein a drive shaft is provided on the pleating wheel and is connected to the pleating wheel drive mechanism for transmission, so that the pleating wheel can contact the fabric and pleat it when in operation.

[0012] In one specific implementation, the crimping presser foot device is mounted on the sewing equipment via a presser foot linkage.

[0013] In a preferred embodiment, the main body of the pressure plate is provided with a needle inlet groove corresponding to the needle inlet position.

[0014] A further preferred embodiment is that a transmission wheel is provided on the crease wheel and coaxially arranged therewith, and the crease wheel transmission mechanism is a belt transmission mechanism.

[0015] In a preferred embodiment, the pleating wheel and the drive wheel are cylindrical gears. Specifically, regarding the selection of cylindrical gears for the pleating wheel, for some synthetic fiber fabrics that are prone to fraying, a cylindrical gear with a knurled surface can be used. The cylindrical gears selected for the pleating wheel and the drive wheel, as well as the tooth profile of the cylindrical gears, can adopt different specifications and sizes. Furthermore, the cylindrical gears can be made of any material that meets the requirements of sewing effects, such as metals (not limited to iron, steel, and alloys), plastics (not limited to general-purpose plastics, engineering plastics, and special plastics), and materials obtained by special processing techniques such as carbon fiber processing techniques.

[0016] Preferably, a transmission wheel is provided on the pleating wheel, coaxially arranged with it. The pleating wheel transmission mechanism is a belt drive mechanism. A transmission groove is provided at the bottom of the pressure plate body. The transmission groove is used to accommodate the belt and limit the belt's transmission path to be parallel to the sewing path. The pressure plate body has an upward-curved bottom at the rear end of the pleating groove. This preferred embodiment firstly facilitates smoother transmission operation of the belt drive mechanism. Secondly, it helps to avoid or significantly reduce the contact interference between the fabric portion in contact with the pleating wheel and the belt parallel to its coaxial side during the pleating process. The reduced friction further reduces the impact on the synchronization of the belt drive mechanism's operation.

[0017] In a further preferred embodiment, the sewing equipment also includes a needle plate, on which a receiving groove is provided to match the transmission groove. This preferred embodiment facilitates the needle plate accommodating the transmission movement between the belt and the drive wheel. This preferred embodiment further reduces contact interference between the fabric and the belt drive process during the wrinkling / pleating process.

[0018] Currently, presser feet in sewing equipment lack self-powered operation, especially those used in the shrinking / pleating process. This is primarily due to interference and synchronization issues between the fabric and the machine's needles, feed dogs, needle plate, cutter, and presser foot itself during sewing. This preferred technical solution significantly improves upon this by utilizing a belt drive mechanism, a pleating wheel, a presser plate body with pleating grooves and transmission grooves, and a needle plate with accommodating grooves. It not only achieves the desired shrinking and pleating effect but also prevents fabric pull-out, reduces asynchrony on the bottom surface caused by external forces, and acts as an anti-twisting agent, greatly enhancing sewing quality and efficiency.

[0019] A further preferred embodiment of the belt drive mechanism includes an automatic tensioning mechanism, a belt, a driving pulley connected to the belt and several driven pulleys, and a power component that drives the driving pulley;

[0020] The automatic tensioning mechanism includes a movable wheel, a movable arm, a vertical fixed plate, and an elastic tensioning component;

[0021] The drive wheel, driven wheel, driving wheel, and movable wheel are connected by a belt for transmission.

[0022] One end of the movable arm is rotatably connected to a vertical fixed plate, and the movable wheel is set on the free end of the movable arm. One end of the elastic tension member is fixed, and the free end of the elastic tension member is in a stretched state and connected to the free end of the movable arm so that the free end of the movable arm receives the horizontal force brought by the elastic tension member.

[0023] When the presser foot device rises and falls under the control of the sewing equipment, the belt tension will vary. An automatic tensioning mechanism is installed. When the belt is loose, the elastic tensioning element applies a horizontal force to the free end of the movable arm, pulling it closer to the fixed end of the elastic tensioning element. When the belt is too tight, the free end of the elastic tensioning element is stretched away from the fixed end, thus automatically adjusting the belt tension on the movable wheel. Specifically, the elastic tensioning element is like a tension spring. When the power component is a motor, under the control of a preset program, the pleating wheel can synchronously and asynchronously rotate in multiple stages, achieving the desired sewing effect.

[0024] Preferably, the sewing equipment further includes a separating device, which includes a separating sheet for separating two or more layers of fabric, a separating sheet connecting seat connected to the separating sheet, and a lifting guide rail, wherein the separating sheet connecting seat is slidably connected to the lifting guide rail.

[0025] When sewing two or more layers of fabric, a separator is inserted between the presser foot and the needle plate to separate the top and bottom layers. This ensures that the bottom layer, located below the separator, is not affected by the belt drive during sewing, keeping it flat. In one specific embodiment, the separator is mounted on the sewing equipment via a mounting base, and its position is adjustable to match different models and specifications of sewing equipment.

[0026] Specifically, the separator is mainly made of various smooth, pressure- and tensile-resistant metal materials that are not easily deformed. Its shape can be adaptively adjusted to suit different machine feed dogs and presser foot settings to separate the bottom and top layers of fabric. This further avoids differences in feed synchronization caused by friction between the top and bottom layers, improving sewing accuracy. The lifting guide rail uses high-precision bearings and guide rail components from both domestic and international manufacturers to drive the separator's up-and-down movement.

[0027] In a preferred embodiment, the sewing equipment further includes an encoder for picking up the number of needles fed in.

[0028] Specifically, the encoder is installed on the sewing equipment. Under the preset program, the encoder captures the number of needles fed by the needle feeding mechanism of the sewing equipment host and feeds the signal back to the PLC programmer. The speed of the power component of the pleating transmission mechanism, such as the motor speed, is adjusted according to the preset program to achieve the desired sewing effect. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of various positions of a preferred embodiment of the presser foot device of the present invention. Figure 1 a: Right view; Figure 1 b: A three-dimensional diagram viewed from below; Figure 1 c: Frontal stereoscopic view Figure 1 ; Figure 1 d: Frontal three-dimensional view of exposed wrinkled groove Figure 2 );

[0031] Figure 2 This is a right-view schematic diagram of an embodiment of the sewing equipment of the present invention;

[0032] Figure 3 This is a rear-view perspective view of the separation device of the present invention.

[0033] Figure 4 This is a front-view perspective structural diagram of an embodiment of the sewing equipment of the present invention;

[0034] Figure 5 This is a rear-view three-dimensional structural diagram of an embodiment of the sewing equipment of the present invention.

[0035] In the attached diagram: 11-Pinching presser foot device, 11111-Pinching roller, 11112-Drive roller, 112-Pinching plate body, 1121-Pinching groove, 1122-Drive groove, 1123-Curved bottom, 1124-Needle inlet groove, 113-Pinching roller drive mechanism, 113a-Belt drive mechanism, 1131-Belt, 1132-Drive wheel, 1133-Driven wheel, 1134-Power component, 1135-Automatic tensioning mechanism, 11351-Movable wheel 11352-Moving arm, 11352b-Free end of the moving arm, 11353-Vertical fixing plate, 11354-Elastic tension member, 11354b-Free end of the elastic tension member, 11354c-Tension spring, 12-Needle plate, 121-Receiving groove, 13-Separating device, 131-Isolation plate, 132-Isolation plate connecting seat, 133-Lifting guide rail, 134-Mounting seat, 14-Pressure foot connecting rod, 2-Encoder, 3-Needle inlet position, 4-Transmission seat.

[0036] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention 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 the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0039] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0040] This application discloses a crimping presser foot device 11, as shown in the attached document. Figure 1 ,include:

[0041] The main body 112 of the pressing plate has a wrinkling groove 1121.

[0042] The pleating wheel 11111 is rotatably connected to the main body 112 of the pressing plate. The pleating wheel 11111 is disposed in the pleating groove 1121 and protrudes downward from the pleating groove 1121 to facilitate contact with the fabric.

[0043] In this application, the wrinkling wheel 11111 is driven to rotate by an external transmission mechanism, so that the sewn fabric can achieve the effect of wrinkle-reducing / wrinkling, and the resulting fabric can further achieve uniform stitches.

[0044] This application also provides a sewing device, as shown in the attached document. Figure 1 Appendix Figure 5 As shown, the aforementioned pleating presser foot device 11 is used, and the rotation axis of the pleating roller 11111 is perpendicular to the sewing path. In use, the presser plate body 112 is provided with a pleating groove 1121 along the sewing path after the needle inlet position 3 of the sewing equipment.

[0045] In the preferred embodiment, as shown in the appendix Figure 1 and attached Figure 2 As shown, the sewing equipment also includes a pleating wheel transmission mechanism 113. A transmission shaft is provided on the pleating wheel 11111 and is connected to the pleating wheel transmission mechanism 113 for transmission, so that the pleating wheel 11111 can contact the fabric and pleat it when in operation.

[0046] The pleating wheel transmission mechanism 113 specifically adopts a transmission mechanism form suitable for driving the transmission wheel 11112 to rotate, preferably such as a belt transmission mechanism, and preferably a motor is used as the power component of the transmission mechanism.

[0047] In another preferred embodiment, as shown in the appendix Figure 1 and attached Figure 5As shown, the main body of the pressing plate 112 is provided with a needle inlet slot 1124 corresponding to the needle inlet position 3.

[0048] In another preferred embodiment, as shown in the appendix Figure 1 and attached Figure 2 As shown, a transmission wheel 11112 is provided on the creping wheel 11111 and is coaxial with it. The creping wheel transmission mechanism 113 is a belt transmission mechanism 113a.

[0049] In a preferred embodiment, the wrinkling wheel 11111 and the transmission wheel 11111 are cylindrical gears.

[0050] In a further preferred embodiment, the diameter of the wrinkling wheel 11111 is larger than the diameter of the drive wheel 11112.

[0051] In a preferred embodiment, as shown in the appendix Figure 1 and attached Figure 2 As shown, a transmission wheel 11112 is provided on the pleating wheel 11111, coaxially arranged with it. The pleating wheel transmission mechanism 113 is a belt transmission mechanism 113a. A transmission groove 1122 is provided at the bottom of the pressure plate body 112. The transmission groove 1122 is used to accommodate the belt 1131 and to limit the transmission path of the belt 1131 to be parallel to the sewing path. The pressure plate body 112 has an upward-curved bottom 1123 at the rear end of the pleating groove 1121. This preferred embodiment firstly facilitates smoother transmission operation of the belt transmission mechanism 113a. Secondly, it helps to avoid or significantly reduce the contact interference between the fabric portion in contact with the pleating wheel 11111 and the belt 1131, which is parallel to the other side of the coaxial wheel, during the transmission process in the pleating / pleating process. The reduced friction further reduces the impact on the synchronicity of the belt transmission mechanism 113a. More preferably, the sewing equipment also includes a needle plate 12, as shown in the attached... Figure 4 and attached Figure 5 As shown, a receiving groove 121 is provided on the needle plate 12 to match the transmission groove 1122. This preferred embodiment facilitates the needle plate 12 to accommodate the transmission movement between the mating belt 1131 and the transmission wheel 11112. This preferred embodiment further reduces the contact interference between the fabric and the belt 1131 during the wrinkling / pleating process.

[0052] In another preferred embodiment, as shown in the appendix Figure 2 As shown, the belt drive mechanism 113a includes an automatic tensioning mechanism 1135, a belt 1131, a drive pulley 1132 connected to the belt 1131 and several driven pulleys 1133, and a power component 1134 that drives the drive pulley 1132.

[0053] The automatic tensioning mechanism 1135 includes a movable wheel 11351, a movable arm 11352, a vertical fixing plate 11353, and an elastic tensioning member 11354.

[0054] The drive wheel 11112, driven wheel 1133, driving wheel 1132, and movable wheel 11351 are connected by a belt 1131 for transmission.

[0055] One end of the movable arm 11352 is rotatably connected to the vertical fixed plate 11353. The movable wheel 11351 is set on the free end 11352b of the movable arm. One end of the elastic tension member 11354 is fixed. The free end 11354b of the elastic tension member is in a stretched state and connected to the free end 11352b of the movable arm, so that the free end 11352b of the movable arm receives the horizontal force brought by the elastic tension member 11354.

[0056] When the presser foot device 11 moves up and down under the control of the sewing equipment, the tension of the belt 1131 will be affected. By setting an automatic tensioning mechanism 1135, when the belt 1131 is loose, the elastic tension member 11354 applies a horizontal force to the free end 11352b of the movable arm, bringing it closer to the fixed end of the elastic tension member 11354, thereby automatically adjusting the tension of the belt 1131 on the movable wheel 11351. Specifically, the elastic tension member 11354 is such as a tension spring.

[0057] In a preferred embodiment, as shown in the appendix Figure 2 As shown, the belt drive mechanism 113a is mounted on the vertically arranged transmission base 4, and the movable wheel 11351 is located between the driving wheel 1132 and the driven wheel 1133 in vertical height. In a preferred embodiment, the driving wheel 1132 is located to the left of the movable wheel 11351, the driven wheel 1133 is located above the movable wheel 11351, the fixed end of the movable arm 11352 is rotatably connected to the lower side of the vertical fixed plate 11353, the free end 11352b of the movable arm is connected to the free end 11354b of the elastic tension member on the upper left side of the vertical fixed plate 11353, the fixed end of the elastic tension member 11354 is located above the vertical fixed plate 11353, and applies a horizontal force to the right to the movable wheel 11351. When the crimping presser foot device 11 moves upward, the belt 1131 loosens, and the free end 11352b of the movable arm is affected by the rightward tension force of the elastic tension member 11354, and rotates to the right to increase the horizontal displacement of the belt 1131 on the right side of the movable wheel 11351, thereby tightening the belt 1131.

[0058] In another preferred embodiment, as shown in the appendix Figure 3 and attached Figure 5As shown, the sewing equipment also includes a separating device 13, which includes a separating sheet 131 for separating two or more layers of fabric, a separating sheet connecting seat 132 for connecting the separating sheet 131, and a lifting guide rail 133. The separating sheet connecting seat 132 is slidably connected to the lifting guide rail 133, and the lifting guide rail 133 is installed on the sewing equipment.

[0059] When sewing two or more layers of fabric, a separating plate 131 is inserted between the presser foot device 11 and the needle plate 12 to separate the surface fabric from the bottom fabric. This ensures that the bottom fabric below the separating plate 131 is not affected by the belt 1131 and the drive wheel 11112 during sewing, keeping the bottom fabric flat. In one specific embodiment, the separating device 13 is mounted on the sewing equipment via a mounting base 134. The mounting position can be adjusted vertically to match different models and specifications of sewing equipment.

[0060] In a preferred embodiment, as shown in the appendix Figure 2 As shown, the sewing equipment also includes an encoder 2 for gripping the number of needles fed.

[0061] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A crimping presser foot device, characterized in that, include: A pressing plate body (112) is provided with a wrinkling groove (1121); The pleating wheel (11111) is rotatably connected to the main body (112) of the press plate. The pleating wheel (11111) is disposed in the pleating groove (1121) and the pleating wheel (11111) protrudes downward from the pleating groove (1121) to facilitate contact with the fabric.

2. A sewing machine, characterized in that, When using the pleating presser foot device (11) as described in claim 1, the rotation axis of the pleating roller (11111) is perpendicular to the sewing path.

3. The sewing equipment as described in claim 2, characterized in that, The sewing equipment also includes a pleating wheel drive mechanism (113), on which a drive shaft is provided and connected to the pleating wheel drive mechanism (113) for transmission, so that the pleating wheel (11111) can contact the fabric and pleat it when in operation.

4. The sewing equipment as described in claim 3, characterized in that, A transmission wheel (11112) is provided on the wrinkling wheel (11111) and is coaxial with it. The wrinkling wheel transmission mechanism (113) is a belt transmission mechanism (113a).

5. The sewing equipment as described in claim 4, characterized in that, The bottom of the presser plate body (112) is provided with a transmission groove (1122), the transmission groove (1122) is used to accommodate the belt (1131) and limit the transmission path of the belt (1131) to be parallel to the sewing path, and the presser plate body (112) is provided with an upward curved bottom (1123) at the rear end of the wrinkling groove (1121).

6. The sewing equipment as described in claim 5, characterized in that, The sewing equipment also includes a needle plate (12), on which a receiving groove (121) is provided to match the transmission groove (1122).

7. The sewing equipment as described in claim 4, characterized in that, The belt drive mechanism (113a) includes an automatic tensioning mechanism (1135), a belt (1131), a drive pulley (1132) connected to the belt (1131) and a plurality of driven pulleys (1133), and a power component (1134) for driving the drive pulley (1132); The automatic tensioning mechanism (1135) includes a movable wheel (11351), a movable arm (11352), a vertical fixing plate (11353), and an elastic tension member (11354); The drive wheel (11112), the driven wheel (1133), the driving wheel (1132), and the movable wheel (11351) are connected and driven by the belt (1131); One end of the movable arm (11352) is rotatably connected to the vertical fixed plate (11353). The movable wheel (11351) is disposed on the free end (11352b) of the movable arm. One end of the elastic tension member (11354) is fixed. The free end (11354b) of the elastic tension member is in a stretched state and connected to the free end (11352b) of the movable arm, so that the free end (11352b) of the movable arm receives the horizontal force brought by the elastic tension member (11354).

8. The sewing equipment as described in claim 2, characterized in that, The sewing equipment also includes a separating device (13), which includes a separating sheet (131) for separating two or more layers of fabric, a separating sheet connecting seat (132) for connecting the separating sheet (131), and a lifting guide rail (133), wherein the separating sheet connecting seat (132) is slidably connected to the lifting guide rail (133).

9. The sewing equipment as described in claim 2, characterized in that, The main body of the pressing plate (112) is provided with a needle inlet slot (1124) corresponding to the needle inlet position (3).

10. The sewing equipment as described in claim 2, characterized in that, The sewing equipment also includes an encoder (2) for gripping the number of needles fed.

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