Sewing machine for automatic hemming, stitching and cutting of ribbon

Abstract

The present invention relates to a sewing machine capable of automatically curling, sewing and cutting a ribbon, and comprises a frame, an automatic sewing mechanism, an automatic tape feeding mechanism, an automatic curling mechanism and an automatic cutting mechanism. On the one hand, the present invention improves the effect of curling and sewing the ribbon by automatically feeding the tape in a relatively flat and linear manner, and reduces the probability of defective products after sewing due to feeding the tape; on the other hand, through the calibration and connection of the calibration plug, the curling folding parts pressed by the presser foot are neatly stacked on both sides of the ribbon width direction, thereby ensuring the quality of the curling of the ribbon after sewing, and has a simple structure, convenient implementation and low cost.

Description

Technical Field

[0001] The invention belongs to the field of sewing equipment, and in particular relates to a sewing machine capable of automatically curling, sewing and cutting a ribbon. Background Art

[0002] At present, in the fields of luggage, car interiors, medical supplies and outdoor products, some webbing or ribbons are usually sewn on the products and have the need for curling. For example, the webbing on the shoulder straps of backpacks needs to be curled to prevent it from falling off the buckle; some webbing-like fabrics on car interiors need to be curled for easy use; the tightening belt on the ambulance stretcher needs to be sewn and curled at the end to ensure that it is securely tied; some clothing and tools for outdoor products also have related applications, etc.

[0003] At the same time, there are two common types of webbing curling: one, single fold; two, double fold (including double fold full roll and double fold empty roll). The existing forming process is usually manual curling, that is, the webbing is first cut into a suitable length, the webbing end is manually curled, and then manually placed under the knotting machine press plate for sewing, and the single piece is completed and the finished product is placed.

[0004] Obviously, the above-mentioned webbing curling process has the following defects:

[0005] 1. It is impossible to carry out fully automatic or semi-automatic production, so the production efficiency is low;

[0006] 2. As for the amount of curling, it is entirely estimated by the operator's experience. Therefore, the size of the belt loop formed by the resulting product is completely different, especially for the double-folded empty roll. Since double folding is required, manual curling operation cannot guarantee the uniformity of the ribbon curling.

[0007] In view of the above problems, some automated or semi-automated research has been conducted on the market. Therefore, the webbing hemming and sewing equipment includes an automatic tape feeding mechanism, an automatic hemming mechanism, an automatic sewing mechanism and an automatic cutting mechanism.

[0008] Specifically, the automatic tape feeding mechanism basically includes a tape unwinding unit, a feeding clamp capable of moving along the length or width direction of the unwinding tape, and a driving unit for driving the feeding clamp to move.

[0009] However, during the unwinding process, the webbing will inevitably shake, which will result in a major defect: the webbing cannot be guaranteed to be output in a straight line, which will affect the subsequent curling and folding. The webbing will be twisted or unable to be aligned and sewn from the side, resulting in a high rate of product defects after production.

[0010] At the same time, for the automatic curling mechanism, it basically includes a curling chuck connected to the tape output end of the automatic tape feeding mechanism, a driving unit that drives the curling chuck to roll and feed the tape, and a connecting unit that connects the curled tape from the curling chuck to the presser foot of the automatic sewing mechanism.

[0011] However, when the connection unit removes the folded ribbon from the curling clamp, the folded part will inevitably shift, so it is difficult to ensure the neatness of the curled part after sewing, which in turn affects the quality of the ribbon curling after sewing. Summary of the invention

[0012] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an improved sewing machine capable of automatically curling, sewing and cutting a ribbon.

[0013] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0014] A sewing machine capable of automatically curling, sewing and cutting a ribbon, comprising:

[0015] frame;

[0016] An automatic suturing mechanism, which includes a machine head, a presser foot, and a needle and shuttle unit;

[0017] An automatic tape feeding mechanism, comprising an unwinding unit for unwinding the rolled tape;

[0018] The automatic hemming mechanism includes a hemming chuck connected to the tape outlet end of the unwinding unit, a driving unit for driving the hemming chuck to move so as to drive the tape to be fed, and a connecting unit for connecting the hemmed tape from the hemming chuck to the presser foot;

[0019] The automatic cutting mechanism is arranged between the automatic sewing mechanism and the unwinding unit.

[0020] In particular, the unwinding unit comprises an unwinding frame arranged on a frame of the webbing hemming and sewing device, a tape feeding frame located between the unwinding frame and the hemming chuck, and a deviation correction component and a transmission power component arranged on the tape feeding frame, wherein the webbing roll is detachably mounted on the unwinding frame, the center line of the tape feeding channel formed by the deviation correction component coincides with the center line of the tape feeding frame, and the width of the tape feeding channel matches the width of the webbing;

[0021] The docking unit includes a plug plate assembly and a docking assembly for driving the plug plate assembly to move, wherein the plug plate assembly includes a plug plate seat arranged on the left side of the presser foot, a calibration plug located on the rear side of the presser foot and vertically arranged with the hemming chuck, and the docking assembly includes a first driver for driving the calibration plug to move horizontally along its own length direction for plugging or resetting, and a plug plate groove matching the upper clamp and the lower clamp is formed on the calibration plug. When the calibration plug and the hemming chuck are plugged into each other, the hemmed webbing is unloaded from the hemming chuck to under the presser foot in an aligned manner with the inner side of the calibration plug close to the presser foot as the reference.

[0022] Preferably, the transmission power assembly includes an upper transmission roller and a lower transmission roller which are arranged at the tape outlet end of the tape feeding channel and extend along the width direction of the tape feeding channel, and a driver which drives the upper transmission roller and the lower transmission roller to rotate towards each other.

[0023] According to a specific implementation and preferred aspect of the present invention, the upper transmission roller is rotatably arranged on the tape feeding frame around its own axis, and the upper transmission roller can be adjusted up and down along the height of the tape feeding frame; the lower transmission roller is an active roller, and the driver is used to drive the lower transmission roller to rotate. Here, one is an active roller and the other is an extrusion type passive roller, so that the ribbon can move toward the hemming chuck when the active and passive rollers rotate in opposite directions.

[0024] According to another specific implementation and preferred aspect of the present invention, the deviation correction assembly includes a left stopper and a right stopper extending along the length direction of the webbing and capable of being adjusted toward each other, and an adjustment component for driving the left stopper and the right stopper to move together or apart synchronously. In this way, regardless of whether the width of the webbing changes, it can be ensured that the center line of the webbing and the center line of the webbing feeding channel coincide, preventing the webbing from being twisted and fed to the hemming chuck.

[0025] Preferably, the adjustment component includes a fixing seat respectively fixed on opposite sides of the tape feeding frame, a bolt that rotates with the fixing seat and is threadedly matched with the left stopper and the right stopper, wherein the bolt is provided with forward and reverse threads respectively, and the left stopper and the right stopper are matched with the forward and reverse threads of the bolt respectively, and under the self-rotation of the bolt, the left stopper and the right stopper are arranged relatively close to and relatively far from each other. The forward and reverse threads are matched to implement synchronous opposite motion, which is simple and convenient to operate.

[0026] Furthermore, a guide rod is provided between the two fixing seats to cross the left block and the right block, wherein the left block and the right block move laterally relative to the guide rod. In this way, the stability of the translation of the left block and the right block is ensured, so that the left block and the right block always remain in a parallel state.

[0027] According to another specific implementation and preferred aspect of the present invention, the deviation correction component also includes a guide module arranged at the tape outlet end of the tape feeding channel and forming a webbing guide channel, and a left arch module and a right arch module arranged between the webbing guide channel and the tape feeding channel and capable of avoiding the movement of the upper transmission roller, wherein the rear end of the left arch module is connected to the front end of the left stopper, and the front end is in contact with or close to the left side of the guide module; the rear end of the right arch module is connected to the front end of the right stopper, and the front end is in contact with or close to the right side of the guide module, and a webbing guide entrance of the webbing guide channel matching the webbing width is formed between the front ends of the left arch module and the right arch module. Here, the setting of the webbing guide channel and the webbing guide entrance facilitates the entry of the webbing, and at the same time, limits the position of the webbing in the up and down directions during transmission, reduces the occurrence of the webbing head warping phenomenon, and ensures that the webbing head smoothly enters the hemming chuck

[0028] Preferably, a guide tongue is provided at the guide module corresponding to the guide belt entrance, extending between the front ends of the left arch module and the right arch module, wherein the bottom surface of the guide tongue gradually slopes downward from the back to the front. The advantage of this arrangement is that it is convenient for the webbing to enter the webbing guide channel from the transmission roller.

[0029] Furthermore, the correction assembly also includes a left limit bar and a right limit bar which are arranged inside the webbing guide channel and are respectively connected to the front ends of the left arch module and the right arch module, wherein a belt feeding limit channel extending along the length direction of the webbing is formed between the left limit bar and the right limit bar.

[0030] According to another specific implementation and preferred aspect of the present invention, the automatic tape feeding mechanism also includes a tape feeding auxiliary unit arranged at the tape feeding end of the tape feeding channel and forming a tape feeding port that matches the thickness of the tape, wherein the auxiliary unit includes a tape feeding rod located at the front end for supporting the tape, and a pressure plate pressed on the frame plate of the tape feeding frame to maintain a downward movement trend, and a tape feeding port is formed between the pressure plate and the frame plate, and the tape moves from the tape feeding port to the tape feeding channel. Here, by setting an adjustable pressure plate, the flattening of tapes of different thicknesses can be met, thereby ensuring that the tape entering the tape feeding channel is in a straight state.

[0031] Preferably, the tape feeding rod is a fixed rod or a rolling shaft that rotates freely around its own axis, and the automatic tape feeding mechanism further includes a webbing buffer unit arranged between the tape feeding rod and the tape inlet.

[0032] Specifically, the webbing cache unit includes a cache seat with a hole for the webbing to pass horizontally, and a power device for driving the cache seat to move up and down. When the through hole, the belt feed port, and the belt feeding rod of the cache seat are arranged flush, the webbing is smoothly fed to the belt feeding channel; when the through hole, the belt feed port, and the belt feeding rod of the cache seat are misaligned up and down, the webbing is cached. The purpose of caching is, for example, to achieve rapid connection between two webbing rolls.

[0033] Preferably, the upper clamping plate and the lower clamping plate are arranged in parallel, and the calibration plug is provided with two plug-in plate slots, one of which is an upper plug-in plate slot and the other is a lower plug-in plate slot. When the calibration plug is vertically plugged into the hemming chuck, the upper clamping plate is located in the upper plug-in plate slot and the lower clamping plate is located in the lower plug-in plate slot. Through the accuracy of the plug-in fit, the ribbon is relatively stable during the unloading process after the hemming, and the ribbon is relatively neatly pressed under the presser foot, so that the quality of the sewn product can meet the requirements.

[0034] Furthermore, when the calibration plug is vertically plugged into the crimping chuck, the plugging end of the calibration plug is inserted through the corresponding side of the crimping chuck. In this way, it is ensured that the crimped ribbon is completely against the inner side of the calibration plug from the side, further improving the neatness of the crimping part when the ribbon is crimped and sewn.

[0035] According to a specific implementation and preferred aspect of the present invention, the automatic hemming mechanism also includes a belt pressing plate arranged on the right side of the presser foot and capable of pressing on the webbing, and a telescopic rod driving the belt pressing plate to move up and down. The belt pressing plate presses the webbing, thereby facilitating the hemming of the webbing, especially for double-folded empty rolls, the hemming chuck first clamps the hemming part through the bottom of the presser foot, and when the belt pressing plate presses the webbing, the hemming chuck returns to the bottom of the presser foot, and then the calibration plug unloads the hemming part from the hemming chuck, and sews it under the pressure of the presser foot, thereby completing the processing of the double-folded empty roll webbing, which is simple to operate and easy to implement.

[0036] Preferably, the docking assembly also includes a second driver for driving the plug-in board seat to move up and down, wherein the plug-in board seat has a first and a second working state. When in the first working state, the plug-in board seat is aligned with the curling chuck, and the two can be plugged into each other; when in the second working state, the plug-in board seat and the curling chuck are misaligned up and down, and the plug-in board seat can avoid the lateral movement of the curling chuck. The advantage of this arrangement is that it can make the structure more compact, especially for the production of double-folded empty roll webbing, it is more convenient to implement.

[0037] According to another specific implementation and preferred aspect of the present invention, the driving unit includes a winding component that drives the hemming chuck to rotate around the center of the length direction of the upper clamp or the lower clamp, a first lateral movement component that drives the hemming chuck to move laterally along the length direction of the slot, and a second lateral movement component that drives the hemming chuck to move laterally along the length direction of the upper clamp or the lower clamp. The webbing hemming is realized under the winding component, and the hemming part is moved laterally under the first and second lateral movement components.

[0038] Preferably, the winding component comprises a winding seat and a winding motor, wherein the curling chuck is rotatably connected to the winding seat via a pivot, and the output shaft of the winding motor is drivingly connected to the pivot.

[0039] Preferably, the first transverse moving component includes a base, a slide seat arranged on the base for transverse movement along the length direction of the plug-in plate slot, and a first driving member for driving the slide seat for linear motion, and the second transverse moving component and the winding component are both arranged on the slide seat.

[0040] Furthermore, a slide rail is provided on the base, and the slide is slidably connected to the base through a sliding block matching the slide rail. The first driving member includes a driving motor arranged on the base, a driving gear located on the base and between the base and the slide, and a rack cooperating with the driving gear and fixed to the bottom of the slide.

[0041] Specifically, the second transverse movement component includes a fixed seat fixed on the sliding seat, a guide rail arranged on the fixed seat and extending along the length direction of the curling chuck, a guide shoe slidably arranged on the guide rail, and a second driving member driving the guide shoe to move transversely on the guide rail, wherein the winding seat is fixedly connected to the guide shoe, and the second driving member is a telescopic rod.

[0042] In addition, a unloading port is opened on the frame between the presser foot and the unwinding unit, and the automatic cutting mechanism includes a cutting knife arranged above the tape outlet end of the unwinding unit and extending along the width direction of the ribbon, a telescopic rod driving the cutting knife to move up and down to cut the ribbon, a storage box located inside the frame and connected to the unloading port, an air blowing pipe located above the storage box and capable of blowing the ribbon toward the storage box, and an air supply component. Here, when the presser foot is pressed down, the needle shuttle unit performs automatic sewing. After sewing is completed, the presser foot is lifted and driven back by the reverse conveyance of the upper and lower transmission rollers. The hemming head is separated from the presser foot, and the air blowing pipeline starts blowing. The hemming head of the webbing moves toward the discharge port and falls into the storage box. At this time, the upper and lower transmission rollers convey the webbing outward in the positive direction. When the webbing length reaches the required length (it can be measured by the roller encoder. When it reaches the required size, an instruction is given to the telescopic rod to cut the webbing), the webbing is cut by the cutting knife. After the cutting is completed, the air blowing pipeline stops blowing, and the finished webbing falls into the storage box. A complete process ends, and then the new process is repeated to realize automatic production.

[0043] Due to the implementation of the above technical solution, the present invention has the following advantages compared with the prior art:

[0044] On the one hand, the present invention improves the effect of ribbon hem sewing by automatically performing relatively flat and linear tape feeding, and reduces the probability of product defects after sewing due to tape feeding; on the other hand, through the calibration and connection of the calibration plug, the curled folding parts pressed by the presser foot are neatly stacked on both sides of the ribbon width direction, thereby ensuring the quality of the ribbon hem after sewing, and the structure is simple, the implementation is convenient, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Figure 1 Schematic diagram of the structure of the sewing machine of this embodiment;

[0047] Figure 2 for Figure 1 A rear view schematic diagram of

[0048] Figure 3 for Figure 1 The structural diagram of the automatic tape feeding mechanism;

[0049] Figure 4 for Figure 3 A magnified schematic diagram of the local structure;

[0050] Figure 5 for Figure 4 An enlarged schematic diagram of another perspective of the local structure;

[0051] Figure 6 for Figure 5 Schematic diagram of the local structure;

[0052] Figure 7 for Figure 5 Schematic diagram of another perspective of the local structure;

[0053] Figure 8 for Figure 1 The structural diagram of the automatic crimping mechanism;

[0054] Fig. 9 for Figure 8 The structural diagram of the middle docking unit;

[0055] Fig.10 for Figure 8 The structural diagram of the middle drive unit;

[0056] Among them: A, rack;

[0057] F, automatic sewing mechanism; f1, machine head; f2, presser foot; f3, needle and shuttle unit;

[0058] S, automatic tape feeding mechanism; S1, unwinding unit; 10, unwinding frame; 11, tape feeding frame; 110, frame plate; 12, deviation correction component; 120, left stopper; 121, right stopper; 122, adjustment component; a, fixing seat; b, bolt; c, guide rod; 123, guide module; 124, left arch module; 125, right arch module; 126, guide tongue; 127, left limit strip; 128, right limit strip; 13, transmission power component; 130, upper transmission roller; 131, lower transmission roller; 132, driver; s, tape feeding channel; 4, feeding auxiliary unit; 40, tape feeding rod; 41, pressure plate; e, through hole; f, adjusting bolt; g, spring; 5, ribbon buffer unit; 50, buffer seat; 50a, through hole; 51, power device;

[0059] J, automatic crimping mechanism; J1, crimping chuck; j10, upper clamping plate; j11, lower clamping plate; J2, driving unit; 20, winding component; 200, winding seat; 201, winding motor; 21, first transverse moving component; 210, base; 211, slide seat; 213, first driving member; h, driving motor; j, driving gear; t, rack; 214, slide rail; 215, sliding block; 22, second transverse moving component; 220, fixed seat; 221, guide rail; 222, guide shoe; 223, second driving member; J3, docking unit; 30, plugboard assembly; 300, plugboard seat; k, elongated hole; 301, calibration plug; s1, upper plugboard slot; s2, lower plugboard slot; 31, docking assembly; 311, first driver; 312, second driver; g, guide rod; J4, belt pressing plate; J5, telescopic rod;

[0060] Q, automatic chopping mechanism; q1, chopping knife; q2, telescopic rod; q3, storage box; q4, air blowing pipeline;

[0061] Z. Webbing. DETAILED DESCRIPTION

[0062] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0063] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0067] like Figure 1 As shown, the sewing machine of this embodiment with automatic curling, sewing and cutting of the ribbon includes a frame A, an automatic sewing mechanism F, an automatic tape feeding mechanism S, an automatic curling mechanism J, and an automatic cutting mechanism Q.

[0068] Combination Figure 2 As shown, the automatic sewing mechanism F includes a machine head f1, a presser foot f2, and a needle and shuttle unit f3, which are all equipped in conventional sewing machines and will not be elaborated on in detail here, but are clearly implementable.

[0069] The automatic tape feeding mechanism S comprises an unwinding unit S1 for unwinding the rolled tape.

[0070] The automatic curling mechanism J comprises a curling chuck J1 connected to the tape outlet end of the unwinding unit S1, a driving unit J2 for driving the curling chuck J1 to drive the tape feeding, and a connecting unit J3 for connecting the curled tape from the curling chuck J1 to the presser foot f2.

[0071] The automatic cutting mechanism Q is arranged between the automatic sewing mechanism F and the unwinding unit S1.

[0072] Combination Figure 3 As shown, the unwinding unit S1 includes an unwinding frame 10 arranged on the frame of the webbing hemming and sewing equipment, a tape feeding frame 11 located between the unwinding frame 10 and the hemming chuck J1, and a correction component 12 and a transmission power component 13 arranged on the tape feeding frame 11, wherein the webbing roll is detachably mounted on the unwinding frame 10, the correction component 12 forms a tape feeding channel s whose center line coincides with the center line of the tape feeding frame, and the width of the tape feeding channel s is equal to the width of the webbing Z.

[0073] The transmission power assembly 13 includes an upper transmission roller 130 and a lower transmission roller 131 which are arranged at the tape outlet end of the tape delivery channel s and extend along the width direction of the tape delivery channel, and a driver 132 which drives the upper transmission roller 130 and the lower transmission roller 131 to rotate towards each other.

[0074] The upper transmission roller 130 is rotatably arranged on the tape feeding frame 11 around its own axis, and the upper transmission roller 130 can be adjusted up and down along the height of the tape feeding frame 11; the lower transmission roller 131 is an active roller, and the driver 132 is used to drive the lower transmission roller 131 to rotate. Here, one is an active roller and the other is an extrusion type passive roller, so the Z-direction curling chuck J1 of the webbing can be moved when the active and passive rollers rotate in opposite directions.

[0075] In this example, the driver 132 is a common motor and pulley transmission mechanism.

[0076] Combination Figure 4 and Figure 5As shown, the deviation correction component 12 includes a left stopper 120 and a right stopper 121 extending along the length direction of the webbing Z and capable of being adjusted toward each other, an adjusting component 122 for driving the left stopper 120 and the right stopper 121 to move together or apart synchronously, a guide module 123 arranged at the tape outlet end of the tape feeding channel s and forming a webbing guide channel, and a left arch module 124 and a right arch module 125 arranged between the webbing guide channel and the tape feeding channel and capable of avoiding the movement of the upper transfer roller 130.

[0077] Specifically, after the movement adjustment of the left stopper 120 and the right stopper 121, regardless of whether the width of the webbing changes, it can be ensured that the center line of the webbing and the center line of the webbing feeding channel coincide with each other, thereby preventing the webbing from being twisted and fed to the crimping chuck.

[0078] In this example, the adjustment component 122 includes a fixing seat a fixed on opposite sides of the tape feeding frame 11, a bolt b that rotates with the fixing seat a and is threadedly matched with the left stopper 120 and the right stopper 121, wherein the bolt b is provided with forward and reverse threads, and the left stopper 120 and the right stopper 121 are matched with the forward and reverse threads of the bolt b, respectively. Under the rotation of the bolt b, the left stopper 120 and the right stopper 121 are relatively close to and relatively far from each other. The forward and reverse threads are matched to implement synchronous opposite motion, which is simple and convenient to operate.

[0079] In this example, a guide rod c is further provided between the two fixing seats a, and crosses the left stopper 120 and the right stopper 121, wherein the left stopper 120 and the right stopper 121 move laterally relative to the guide rod c. In this way, the stability of the translation of the left stopper 120 and the right stopper 121 is ensured, so that the left stopper 120 and the right stopper 121 always maintain a parallel state.

[0080] Combination Figure 6 and Figure 7 As shown, the rear end of the left arch module 124 is fixedly connected to the front end of the left stopper 120, and the front end abuts against the left side of the guide module 123; the rear end of the right arch module 125 is fixedly connected to the front end of the right stopper 121, and the front end abuts against the right side of the guide module 123, and a guide belt entrance of the webbing guide channel matching the webbing width is formed between the front ends of the left arch module 124 and the right arch module 125. Here, the setting of the webbing guide channel and the guide belt entrance facilitates the entry of the webbing, and at the same time, limits the position of the webbing in the up-and-down direction during transmission, reduces the occurrence of the warping phenomenon of the webbing head, and ensures that the webbing head smoothly enters the crimping chuck.

[0081] At the same time, a guide tongue 126 is provided at the guide module 123 corresponding to the guide belt entrance, which extends between the front ends of the left arch module 124 and the right arch module 125, wherein the bottom surface of the guide tongue 126 gradually tilts downward from the back to the front. The advantage of this arrangement is that it is convenient for the webbing to enter the webbing guide channel from the transmission roller. The hemming clamp 2 has an upper clamping plate 20 and a lower clamping plate 21 that move toward each other and clamp or release from the front and back of the webbing.

[0082] Furthermore, the deviation correction component 12 also includes a left limit bar 127 and a right limit bar 128 which are arranged inside the webbing guide channel and are fixedly connected to the front ends of the left arch module 124 and the right arch module 125, respectively, wherein a tape feeding limit channel extending along the length direction of the webbing is formed between the left limit bar 127 and the right limit bar 128. In this way, it is ensured that the webbing will not deviate left and right in the webbing guide channel. The driving unit 3 is used to drive the hemming chuck 2 to move so as to drive the feeding of the webbing Z. In this embodiment, the movement involved is the translational movement along the length direction and the width direction of the webbing Z, as well as driving the rotation of the hemming chuck 2 itself, which is also a conventional structure and will not be explained in detail here, but it is also clear and feasible.

[0083] In this example, the automatic tape feeding mechanism further includes a tape feeding auxiliary unit 4 arranged at the tape feeding end of the tape feeding channel s and forming a tape feeding port that matches the thickness of the tape, wherein the feeding auxiliary unit 4 includes a tape feeding rod 40 located at the front end for supporting the tape Z, and a pressing plate 41 pressed on the frame plate 110 of the tape feeding frame 11 to maintain a downward movement tendency, and a tape feeding port is formed between the pressing plate 41 and the frame plate 110, and the tape Z moves from the tape feeding port to the tape feeding channel s. Here, by setting the adjustable pressing plate, the flattening of tapes of different thicknesses can be met, thereby ensuring that the tape entering the tape feeding channel is in a straight state.

[0084] Specifically, a through hole e is provided on the pressing plate 41, and a corresponding docking hole is provided on the frame plate 110. At the same time, an adjusting bolt f is used to pass through the through hole e and connect with the docking hole. As for the downward pressing movement trend, it is mainly based on a spring g which is sleeved on the outer periphery of the adjusting bolt f and whose two ends abut between the nut and the pressing plate 41. When the adjusting bolt f is tightened downward, the spring is compressed, so that the pressing plate maintains the downward pressing movement trend. When the ribbon passes through the ribbon inlet, it is flattened by the pressing plate and enters the ribbon feeding channel s relatively straight.

[0085] The tape feeding rod 40 is a fixed rod or a rolling shaft that rotates freely around its own axis. The automatic tape feeding mechanism also includes a webbing buffer unit 5 arranged between the tape feeding rod 40 and the tape inlet.

[0086] Specifically, the webbing buffer unit 5 includes a buffer seat 50 having a hole 50a for the webbing to pass horizontally, and a power device 51 for driving the buffer seat 50 to move up and down. When the through hole 50a of the buffer seat 50, the belt inlet, and the belt feeding rod 40 are arranged flush, the webbing Z is smoothly fed to the belt feeding channel s; when the through hole 50a of the buffer seat 50, the belt inlet, and the belt feeding rod 40 are misaligned up and down, the webbing Z is buffered.

[0087] As for the purpose of caching, the following aspects are sufficient: 1) When the upper transmission roller 130 and the lower transmission roller 131 perform the rewinding operation, the movement of the cache seat 50 ensures that the ribbon in the ribbon feeding channel S will not arch to maintain flatness; 2) It can also be used for the connection of the roll changing operation of two ribbon rolls.

[0088] In this example, the power device 51 is a cylinder (of course, it can also be a hydraulic cylinder, an oil cylinder, etc.).

[0089] Combination Figure 8 As shown, the curling chuck J1 is connected with the tape outlet end of the automatic tape feeding mechanism, and has an upper clamping plate j10 and a lower clamping plate j11 that move towards each other, wherein the upper clamping plate j10 and the lower clamping plate j11 clamp or release the tape Z from the front and back sides respectively, and the upper clamping plate j10 and the lower clamping plate j11 are arranged in parallel.

[0090] The driving unit J2 is mainly used to drive the crimping chuck J1 to roll or feed the webbing Z.

[0091] Combination Fig. 9 As shown, the connecting unit J3 can connect the curled webbing from the curling clamp J1 to the pressure foot f2 of the automatic sewing mechanism, and includes a plug board assembly 30 and a connecting assembly 31 for driving the plug board assembly 30 to move.

[0092] The insert plate assembly 30 includes an insert plate seat 300 disposed on the left side of the presser foot f2 and a calibration plug 301 located at the rear side of the presser foot and disposed perpendicularly to the crimping chuck J1.

[0093] The calibration plug 301 is provided with two plug-in plate slots, one of which is an upper plug-in plate slot s1 and the other is a lower plug-in plate slot s2. When the calibration plug 301 is vertically plugged with the hemming chuck J1, the upper clamping plate j10 is located in the upper clamping plate slot s1 and the lower clamping plate j11 is located in the lower clamping plate slot s2. The hemmed ribbon is unloaded from the hemming chuck J1 to the bottom of the presser foot f2 in an aligned manner with the inner side surface of the calibration plug 301 close to the presser foot f2 as a reference. Through the accuracy of the plug-in fit, the unloading process of the hemmed ribbon is relatively stable, and the ribbon is relatively neatly pressed under the presser foot, so that the quality of the sewn product can meet the requirements.

[0094] In this example, when the calibration plug 301 is vertically plugged with the hemming clamp J1, the upper clamp j10 and the lower clamp j11 are in a water state, and the calibration plug 301 is inserted from the left side of the upper clamp j10 and the lower clamp j11 and is inserted from the right side. In this way, it is ensured that the hemmed ribbon is completely against the inner side of the calibration plug from the side, further improving the neatness of the hemming part when the ribbon is hemmed.

[0095] The docking assembly 31 includes a first driver 311 for driving the calibration plug 301 to move horizontally along its length direction for insertion or reset, and a second driver 312 for driving the plugboard seat 300 to move up and down.

[0096] Specifically, the first driver 311 is a telescopic rod arranged horizontally, and the second driver 312 is a telescopic rod arranged vertically.

[0097] In this example, the first driver 311 and the second driver 312 are cylinders. It should be noted that the first driver 311 is arranged at the upper end (telescopic end) of the second driver 312, and through the setting of the vertically extending guide rod d, the first driver 311, the plug plate seat 300 and the calibration plug 301 can synchronously move up and down along the length direction of the guide rod d to switch the state.

[0098] The plugboard seat 300 is disposed at the telescopic end of the first driver 311 .

[0099] Meanwhile, an elongated hole k is provided in the plug board seat 300 , wherein the elongated hole k extends along the width direction of the calibration plug 301 (or the plug board slot).

[0100] The calibration plug 301 is fixed relatively to the plugboard seat 300 and the calibration plug 301 by external bolts penetrating the elongated hole k. In this way, different positions can be adjusted according to different widths of webbing to meet the connection needs.

[0101] In this example, the automatic hemming mechanism further includes a belt pressing plate J4 disposed on the right side of the presser foot and capable of pressing on the webbing Z, and a telescopic rod J5 (a cylinder in this example) that drives the belt pressing plate J4 to move up and down. Specifically, the hemming chuck first clamps the hemming part through the bottom of the presser foot, and when the belt pressing plate presses the webbing, the hemming chuck returns to the bottom of the presser foot, and then the calibration plug unloads the hemming part from the hemming chuck, and sews it under the pressure of the presser foot, thereby completing the processing of the double-folded empty rolled webbing, which is simple to operate and easy to implement.

[0102] At the same time, in order to facilitate the sewing and curling of double-folded empty-rolled webbings, the plug-in plate seat has a first and a second working state. When in the first working state, the plug-in plate seat is aligned with the curling chuck, and the two can be plugged into each other; when in the second working state, the plug-in plate seat and the curling chuck are staggered up and down, and the plug-in plate seat can avoid the lateral movement of the curling chuck.

[0103] Combination Fig.10 As shown, the driving unit J2 includes a winding component 20 that drives the hemming clamp J1 to rotate around the center of the length direction of the upper clamp j10 or the lower clamp j11, a first transverse moving component 21 that drives the hemming clamp J1 to transversely move along the length direction of the slot, and a second transverse moving component 22 that drives the hemming clamp J1 to transversely move along the length direction of the upper clamp j10 or the lower clamp j11. The webbing hemming is realized under the winding component, and the hemming part is transversely moved under the first and second transverse moving components.

[0104] The winding component 20 includes a winding seat 200 and a winding motor 201, wherein the curling chuck J1 is rotatably connected to the winding seat 200 via a pivot, and the output shaft of the winding motor 201 is drivingly connected to the pivot.

[0105] The first transverse moving component 21 includes a base 210, a slide 211 disposed on the base 210 for transverse movement along the length direction of the slot, and a first driving member 213 for driving the slide 211 to move linearly. The second transverse moving component 22 and the winding component 20 are both disposed on the slide 211.

[0106] A slide rail 214 is also provided on the base 210 , and the slide seat 211 is slidably connected to the base 210 via a slide block 215 matching the slide rail 214 .

[0107] The first driving member 213 includes a driving motor h disposed on the base 210 , a driving gear j located on the base 210 and between the base 210 and the slide 211 , and a rack t matched with the driving gear j and fixed to the bottom of the slide 211 .

[0108] The second transverse movement component 22 includes a fixed seat 220 fixed on the slide 211, a guide rail 221 arranged on the fixed seat 220 and extending along the length direction of the curling chuck J1, a guide shoe 222 slidably arranged on the guide rail 221, and a second driving member 223 driving the guide shoe 222 to move transversely on the guide rail 221, wherein the winding seat 200 is fixedly connected to the guide shoe 222.

[0109] The second driving member 223 is a telescopic rod, which is a cylinder in this example.

[0110] In addition, a unloading port is opened on the frame between the presser foot f2 and the unwinding unit S1, and the automatic cutting mechanism Q includes a cutting knife q1 arranged above the tape outlet end of the unwinding unit S1 and extending along the width direction of the tape, a telescopic rod q2 driving the cutting knife q1 to move up and down to cut the tape, a storage box q3 located inside the frame and connected to the unloading port, an air blowing pipe q4 located above the storage box q3 and capable of blowing the tape toward the storage box q3, and an air supply component.

[0111] In summary, the working process of this embodiment is as follows (taking double-folded empty roll as an example):

[0112] The webbing is transmitted from the unwinding unit, the hemming chuck holds the webbing and turns it 360°, then the hemming chuck first holds the hemming part and passes it through the bottom of the presser foot to the required length position, the belt pressing plate moves downward to press the webbing, the hemming chuck returns to the bottom of the presser foot, and then the calibration plug and the hemming chuck are vertically plugged into each other, and when the hemming chuck retreats along the width direction of the webbing, the inner side of the calibration plug unloads the hemming part from the hemming chuck to the presser foot in an aligned manner. When the presser foot is pressed down, the needle and shuttle unit performs automatic sewing. After sewing is completed, the presser foot is lifted and transported in the reverse direction of the upper and lower transmission rollers. Down, driving the ribbon back, the hemming head separates from the presser foot, the air blowing pipeline starts blowing, the hemming head of the ribbon moves to the discharge port and falls to the storage box. At this time, the upper and lower transmission rollers convey the ribbon outward in the positive direction. When the length of the ribbon reaches the required length (it can be measured by the roller coder. When it reaches the required size, an instruction is given to the telescopic rod to cut the ribbon), the ribbon is cut by the cutting knife. After the cutting is completed, the air blowing pipeline stops blowing, and the finished ribbon falls into the storage box. A complete process ends, and then the new process is repeated to realize automatic production.

[0113] The above detailed description of the present invention is intended to enable persons familiar with the art to understand the contents of the present invention and implement them. It does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewing machine capable of automatically curling, sewing and cutting a ribbon, comprising: frame; An automatic suturing mechanism, which includes a machine head, a presser foot, and a needle and shuttle unit; An automatic tape feeding mechanism, comprising an unwinding unit for unwinding the rolled tape; An automatic hemming mechanism, comprising a hemming chuck connected to the tape outlet end of the unwinding unit, a driving unit for driving the hemming chuck to move so as to drive the tape to be fed, and a connecting unit for connecting the hemmed tape from the hemming chuck to the presser foot; An automatic cutting mechanism is arranged between the automatic sewing mechanism and the unwinding unit, Features: The unwinding unit comprises an unwinding frame arranged on the frame of the webbing hemming and sewing device, a tape feeding frame located between the unwinding frame and the hemming chuck, and a deviation correction component and a transmission power component arranged on the tape feeding frame, wherein the webbing roll is detachably mounted on the unwinding frame, the center line of the tape feeding channel formed by the deviation correction component coincides with the center line of the tape feeding frame, and the width of the tape feeding channel matches the width of the webbing; The docking unit includes a plug-in plate assembly and a docking assembly that drives the plug-in plate assembly to move, wherein the plug-in plate assembly includes a plug-in plate seat arranged on the left side of the presser foot, a calibration plug located on the rear side of the presser foot and arranged perpendicularly to the hemming chuck, and the docking assembly includes a first driver that drives the calibration plug to move horizontally along its own length direction for insertion or reset movement, and a plug-in plate groove that matches the upper clamp and the lower clamp is formed on the calibration plug, and when the calibration plug and the hemming chuck are plugged into each other, the hemmed webbing is unloaded from the hemming chuck to the presser foot in an aligned manner with the inner side surface of the calibration plug close to the presser foot as a reference; the upper clamp and the lower clamp are arranged in parallel, and the calibration plug is provided with two plug-in plate grooves, one of which is an upper plug-in plate groove and the other is a lower plug-in plate groove. When the calibration plug is inserted into the hemming chuck, the hemmed webbing is unloaded from the hemming chuck to the presser foot in an aligned manner. When the plug is vertically plugged into the curling chuck, the upper clamp is located in the upper plug-in plate groove, the lower clamp is located in the lower plug-in plate groove, and the plug-in end of the calibration plug is arranged to pass through the corresponding side of the curling chuck; the automatic curling mechanism also includes a belt pressing plate arranged on the right side of the presser foot and capable of pressing on the webbing, and a telescopic rod driving the belt pressing plate to move up and down, and the docking assembly also includes a second driver for driving the plug-in plate seat to move up and down, wherein the plug-in plate seat has a first and a second working state, when in the first working state, the plug-in plate seat is aligned with the curling chuck, and the two can be plugged into each other; when in the second working state, the plug-in plate seat and the curling chuck are misaligned up and down, and the plug-in plate seat can avoid the lateral movement of the curling chuck.

2. The sewing machine capable of automatically curling, sewing and cutting the ribbon according to claim 1, characterized in that: The transmission power assembly includes an upper transmission roller and a lower transmission roller which are arranged at the tape outlet end of the tape feeding channel and extend along the width direction of the tape feeding channel, and a driver which drives the upper transmission roller and the lower transmission roller to rotate towards each other.

3. The sewing machine capable of automatically curling, sewing and cutting the ribbon according to claim 2, characterized in that: The deviation-correcting assembly comprises a left stopper and a right stopper which extend along the length direction of the webbing and can be adjusted toward each other, and an adjusting component for driving the left stopper and the right stopper to move together or apart synchronously.

4. The sewing machine capable of automatically curling, sewing and cutting the ribbon according to claim 3, characterized in that: The adjusting component comprises a fixing seat respectively fixed on two opposite sides of the tape feeding frame, a bolt rotatably matched with the fixing seat and respectively matched with the left stopper and the right stopper thread, and a guide rod is also provided between the two fixing seats, which passes through the left stopper and the right stopper, wherein the left stopper and the right stopper can move laterally relative to the guide rod; the deviation correction component also comprises a guide module which is arranged at the tape outlet end of the tape feeding channel and forms a webbing guide channel, and a left arch module and a right arch module which are arranged between the webbing guide channel and the tape feeding channel and can avoid the movement of the upper transmission roller, wherein the rear end of the left arch module is connected to the front end of the left stopper, and the front end contacts or is close to the left side of the guide module; the right arch module The rear end of the block is connected to the front end of the right stop block, the front end contacts or is close to the right side of the guide module, and a guide belt entrance of the webbing guide channel matching the webbing width is formed between the front ends of the left arch module and the right arch module; a guide tongue extending between the front ends of the left arch module and the right arch module is also provided at the guide module corresponding to the guide belt entrance, wherein the bottom surface of the guide tongue gradually tilts downward from back to front; the deviation correction component also includes a left limit strip and a right limit strip arranged inside the webbing guide channel and respectively connected to the front ends of the left arch module and the right arch module, wherein a belt feeding limit channel extending along the length direction of the webbing is formed between the left limit strip and the right limit strip.

5. The sewing machine capable of automatically curling, sewing and cutting the ribbon according to claim 1, characterized in that: The automatic tape feeding mechanism also includes a tape feeding auxiliary unit which is arranged at the tape feeding end of the tape feeding channel and forms a tape feeding port which matches the thickness of the tape, wherein the auxiliary unit includes a tape feeding rod located at the front end for supporting the tape, and a pressure plate which is pressed on the frame plate of the tape feeding frame to maintain a downward movement trend, wherein the tape feeding port is formed between the pressure plate and the frame plate, and the tape moves from the tape feeding port to the tape feeding channel.

6. The sewing machine capable of automatically curling, sewing and cutting the ribbon according to claim 5, characterized in that: The tape feeding rod is a fixed rod or a rolling shaft that rotates freely around its own axis. The automatic tape feeding mechanism also includes a tape buffer unit arranged between the tape feeding rod and the tape inlet. The tape buffer unit includes and has a cache seat with a hole for the tape to pass horizontally, and a power device that drives the cache seat to move up and down. When the through hole of the cache seat, the tape inlet, and the tape feeding rod are arranged flush, the tape is smoothly fed to the tape feeding channel; when the through hole of the cache seat is relatively misaligned with the tape inlet and the tape feeding rod, the tape is buffered.

7. The sewing machine capable of automatically curling, sewing and cutting the ribbon according to claim 1, characterized in that: The driving unit includes a winding component that drives the curling chuck to rotate around the center of the length direction of the upper clamp or the lower clamp, a first transverse movement component that drives the curling chuck to move transversely along the length direction of the insertion plate slot, and a second transverse movement component that drives the curling chuck to move transversely along the length direction of the upper clamp or the lower clamp.

8. The sewing machine capable of automatically curling, sewing and cutting the ribbon according to claim 1, characterized in that: A discharge port is provided on the frame between the presser foot and the unwinding unit, and the automatic cutting mechanism includes a cutting knife arranged above the tape outlet end of the unwinding unit and extending along the width direction of the ribbon, a telescopic rod driving the cutting knife to move up and down to cut the ribbon, a storage box located inside the frame and connected to the discharge port, an air blowing pipeline located above the storage box and capable of blowing the ribbon toward the storage box, and an air supply component.

Images