Automatic zipper stitching method

Abstract

The invention discloses an automatic zipper stitching method, and relates to the technical field of garment sewing. The automatic zipper stitching method comprises the following steps: S100, processing a zipper before sewing: clamping the zipper and enabling the zipper to be in a straight state; s200, treating the cloth piece before sewing: fixing the cloth piece and performing redundant position treatment before sewing on the cloth piece according to different zipper materials, wherein the cloth piece is positioned below the zipper; and S300, processing flow during sewing of the zipper and the cloth piece: keeping the zipper relatively fixed on the cloth piece, controlling the moving speed of the zipper and the cloth piece relative to a machine head of the sewing machine, and controlling a machine needle of the machine head to sew the zipper on the cloth piece. According to the automatic zipper stitching method, the requirement of the zipper stitching process on the operation technology of workers is greatly reduced in an automatic mode, and the production efficiency is improved; in the method, a cloth piece redundancy function is provided, the sewing problems of arching, wrinkling and the like caused by differential sewing of the cloth piece and the zipper are solved, and the product quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of garment sewing, in particular to an automatic method for sewing a zipper. BACKGROUND

[0002] In the field of garment sewing, the process of sewing a zipper is the most complex and requires the highest skill. Because the length of the zipper is not the same as the length of the cloth, the cloth needs to be adjusted during the manual sewing process, and different types of clothing have different requirements for the amount of adjustment. In addition, the left and right sides of the zipper are sewn on the left and right pieces of cloth respectively, so the garment process requires the left and right pieces of cloth and the left and right zippers to be aligned.

[0003] Currently, the process of sewing a zipper is completed by hand, which requires high skill and takes a lot of time, resulting in low production efficiency. There are template machines on the market that can complete the process of sewing a zipper, but using a template machine to sew a zipper requires different specifications of templates to achieve various amounts of adjustment, and cannot automatically adjust the amount of adjustment. In addition, the placement of the zipper needs to be accurate. SUMMARY

[0004] The purpose of the present application is to provide an automatic method for sewing a zipper, which greatly reduces the requirement for worker's operation skill through automation, and improves production efficiency. The method provides a cloth adjustment function to avoid sewing problems such as arching and wrinkling caused by differences between the cloth and the zipper, and improves product quality.

[0005] To achieve the above-mentioned purpose, the present application provides an automatic method for sewing a zipper, comprising:

[0006] S100, a process for handling the zipper before sewing: clamping the zipper and keeping the zipper in a straightened state;

[0007] S200, a process for handling the cloth before sewing: fixing the cloth and adjusting the cloth before sewing according to the difference in material with the zipper, and the cloth is located below the zipper;

[0008] S300, a process for handling the zipper and the cloth during sewing: keeping the relative fixation of the zipper on the cloth, controlling the movement speed of the zipper and the cloth relative to the head of the sewing machine, and controlling the needle of the head to sew the zipper on the cloth.

[0009] In some embodiments, the S100 specifically comprises:

[0010] Placing the head of the zipper in the zipper head clamping mechanism and the tail of the zipper in the zipper tail clamping mechanism;

[0011] Controlling the zipper head clamping mechanism and the zipper tail clamping mechanism to move towards a relatively distant direction;

[0012] The zipper is in a straightened state.

[0013] In some embodiments, the S100 further comprises:

[0014] When the zipper head clamping mechanism and the zipper tail clamping mechanism are controlled to move in opposite directions away from each other, the real-time tension of the zipper is detected by the tension sensor;

[0015] When the real-time tension of the zipper reaches the preset tension, it is determined that the zipper is in the desired straightened state, and the relative movement of the zipper head clamping mechanism and the zipper tail clamping mechanism is stopped.

[0016] In some embodiments, the S200 specifically comprises:

[0017] The cloth piece is placed in the position adjustment mechanism;

[0018] The cloth piece is fixed through the position adjustment mechanism;

[0019] The cloth piece is moved to the lower side of the zipper through the position moving assembly.

[0020] In some embodiments, the S200 further comprises:

[0021] When the cloth piece is moved to the lower side of the zipper through the position moving assembly, the position size of each part of the cloth piece is specified according to the process parameters of the cloth piece, and the position adjustment assembly is controlled to move a plurality of groups of pressing feet to positions corresponding to the position size of each part, thereby completing the position processing of the cloth piece before sewing.

[0022] In some embodiments, the S200 further comprises:

[0023] After the cloth piece is fixed through the position adjustment mechanism, the cloth piece is moved to the lower side of the zipper through the position moving assembly.

[0024] In some embodiments, the S300 specifically comprises:

[0025] The zipper is clamped by the zipper head clamping mechanism and the zipper tail clamping mechanism and is in a straightened state, the cloth piece is fixed on the position adjustment mechanism and completes the position processing, and the relative fixation of the zipper on the cloth piece is maintained by the relative static state of the zipper head clamping mechanism, the zipper tail clamping mechanism and the position adjustment mechanism;

[0026] The zipper head clamping mechanism, the zipper tail clamping mechanism and the position adjustment mechanism are installed on the cloth feeding mechanism, and the movement speed of the zipper and the cloth piece relative to the head of the sewing machine is controlled by controlling the movement speed of the cloth feeding mechanism;

[0027] The needle of the head of the sewing machine is controlled to sew the zipper on the cloth piece.

[0028] In some embodiments, the S300 further comprises:

[0029] In the control of the moving speed of the fabric feeding mechanism, the working state of the fabric feeding mechanism is adjusted according to the needle position of the sewing machine;

[0030] When the needle is above the fabric, the fabric feeding mechanism is controlled to switch to the low-speed running state;

[0031] When the needle is below the fabric, the fabric feeding mechanism is controlled to switch to the high-speed running state.

[0032] In some embodiments, before adjusting the working state of the fabric feeding mechanism, the position speed information of the needle of the sewing head is obtained by controlling the motor of the sewing head.

[0033] In some embodiments, the S300 further comprises:

[0034] When the needle moves from above the fabric to below the fabric and the needle moves from below the fabric to above the fabric, the fabric feeding mechanism is controlled to smoothly transition between the low-speed running state and the high-speed running state in an S-shaped fitting manner.

[0035] With respect to the above background technology, the automatic zipper sewing method provided by the present application mainly includes: S100, a processing flow of the zipper before sewing, S200, a processing flow of the fabric before sewing, and S300, a processing flow of the zipper and the fabric during sewing. In S100, the zipper is clamped and kept in a straightened state; in S200, the fabric is fixed and subjected to a pre-sewing position adjustment according to the difference between the zipper material, and the fabric is located below the zipper; in S300, the relative fixation of the zipper on the fabric is maintained, the moving speed of the zipper and the fabric relative to the sewing head of the sewing machine is controlled, and the needle of the sewing head is controlled to sew the zipper on the fabric.

[0036] Through the above process, it can be seen that the automatic zipper sewing method at least has the following beneficial effects: the automatic zipper sewing method greatly reduces the requirement for the operation technology of workers in the zipper sewing process through an automatic manner, and improves the production efficiency; the fabric position adjustment function is provided in the method, which avoids the sewing problems such as arching and wrinkling caused by the difference between the fabric and the zipper, and improves the product quality. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0038] Figure 1 The flowchart of the automatic zipper sewing method provided by the embodiments of the present application is shown.

[0039] Figure 2 The flowchart of the automatic threading method provided by another embodiment of the present application is shown in the figure;

[0040] Figure 3 The structural diagram of the automatic threading device provided by the embodiment of the present application is shown in the figure;

[0041] Figure 4 The structural diagram of the zipper clamping mechanism provided by the embodiment of the present application is shown in the figure;

[0042] Figure 5 The structural diagram of the redundancy mechanism provided by the embodiment of the present application is shown in the figure;

[0043] Figure 6 The displacement variation diagram of the fabric feeding mechanism under one rotation of the machine head is shown in the figure;

[0044] Figure 7 The speed variation diagram of the fabric feeding mechanism under one rotation of the machine head is shown in the figure.

[0045] Wherein:

[0046] Frame 1, fabric feeding mechanism 2, first support column 201, second support column 202, zipper clamping mechanism 3, cross beam 301, control motor 302, synchronous belt 303, zipper lifting cylinder 304, zipper clamping cylinder 305, zipper clamping jaw group 306, tension sensor 307, zipper clamping guide rail 308, zipper 309, redundancy mechanism 4, redundancy lifting cylinder 401, redundancy lifting guide rail 402, redundancy lifting support 403, redundancy advancing and retreating guide rail 404, redundancy advancing and retreating cylinder 405, redundancy advancing and retreating seat 406, lead screw motor 407, redundancy adjusting guide rail 408, scissor assembly 409, presser foot 410, sewing machine 5. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0048] In order to enable those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0049] In view of the deficiencies of the prior art in the foregoing background art, the present application provides an automatic threading method, which can realize the threading process in an automatic manner, and provides a fabric redundancy function.

[0050] Please refer to Figure 1 , Figure 1 The flowchart of the automatic threading method of the zipper provided by the embodiment of the present application is shown.

[0051] In the first specific embodiment, the automatic threading method of the zipper provided by the embodiment of the present application mainly includes: S100, a processing flow of the zipper before sewing; S200, a processing flow of the cloth piece before sewing; and S300, a processing flow of the zipper and the cloth piece during sewing.

[0052] In S100, the zipper is clamped and is in a straightened state; in S200, the cloth piece is fixed and is subjected to a position adjustment before sewing according to the difference between the zipper material, and the cloth piece is located below the zipper; and in S300, the relative fixation of the zipper on the cloth piece is maintained, the moving speed of the zipper and the cloth piece relative to the head of the sewing machine 5 is controlled, and the needle of the head sews the zipper on the cloth piece.

[0053] Through the above process, it can be seen that the automatic threading method of the zipper at least has the following beneficial effects: the automatic threading method of the zipper greatly reduces the requirement for the operation technology of workers in the threading process of the zipper by means of automation, and improves the production efficiency; the cloth piece position adjustment function is provided in the method, which avoids the sewing problems such as arching and wrinkling caused by the difference between the cloth piece and the zipper during sewing, and improves the product quality.

[0054] In order to better introduce the automatic threading method of the zipper, the automatic threading device of the zipper using the automatic threading method of the zipper is described below.

[0055] Please refer to Figure 3 , Figure 3 The structure diagram of the automatic threading device of the zipper provided by the embodiment of the present application is shown.

[0056] In some cases, the automatic threading device of the zipper mainly includes a rack 1, a cloth feeding mechanism 2, a zipper clamping mechanism 3, a position adjustment mechanism 4 and a sewing machine 5. The cloth feeding mechanism 2 and the sewing machine 5 are installed on the rack 1, and the zipper clamping mechanism 3 and the position adjustment mechanism 4 are installed on the cloth feeding mechanism 2. The zipper clamping mechanism 3 is used for clamping the zipper, the position adjustment mechanism 4 is used for fixing the cloth piece, the cloth feeding mechanism 2 is used for controlling the movement of the zipper clamping mechanism 3 and the position adjustment mechanism 4 relative to the rack 1, thereby realizing the movement of the sewing machine 5 relative to the zipper clamping mechanism 3 and the position adjustment mechanism 4, so as to realize the sewing of the zipper on the cloth piece by the movement of the cloth piece and the zipper under the premise that the position of the sewing machine 5 is unchanged.

[0057] For the fabric feeding mechanism 2, the fabric feeding mechanism 2 can have various implementations, including but not limited to electric, pneumatic and hydraulic, as long as the movement control of the zipper clamping mechanism 3 and the redundant position mechanism 4 can be achieved. In use, the fabric feeding mechanism 2 controls the movement of the zipper clamping mechanism 3 and the redundant position mechanism 4, thereby controlling the movement of the fabric and the zipper on the fabric, which is equivalent to providing the sewing machine 5 with a fabric feeding function, and then the zipper is sewn on the fabric by the sewing machine 5 in the feeding process of the fabric and the zipper.

[0058] The automatic zipper sewing method will be further described below in combination with the automatic zipper sewing device.

[0059] Please refer to Figure 2 , Figure 2 The flowchart of the automatic zipper sewing method provided by another embodiment of the present application is shown.

[0060] In some embodiments, S100 specifically includes: placing the head of the zipper in the zipper head clamping mechanism and the tail of the zipper in the zipper tail clamping mechanism; controlling the zipper head clamping mechanism and the zipper tail clamping mechanism to move towards the opposite direction away from each other; and making the zipper in a straightened state.

[0061] In some embodiments, S100 further includes: detecting the real-time tension of the zipper by the tension sensor when controlling the zipper head clamping mechanism and the zipper tail clamping mechanism to move towards the opposite direction away from each other; and when the real-time tension of the zipper reaches a preset tension, judging that the zipper is in the desired straightened state, and stopping the relative movement of the zipper head clamping mechanism and the zipper tail clamping mechanism.

[0062] In combination with the above embodiments, the processing before sewing the zipper is described as follows.

[0063] In this embodiment, the head and tail of the zipper need to be clamped by the zipper head clamping mechanism and the zipper tail clamping mechanism before sewing the zipper, and the zipper needs to be kept in a straightened state for subsequent sewing. The clamping of the head and tail of the zipper is achieved by the zipper head clamping mechanism and the zipper tail clamping mechanism located at the head and tail of the zipper, and the straightening of the zipper is achieved by fixing one end of the zipper and moving the other end away from the fixed end (including the way of fixing the head and moving the tail, and the way of fixing the tail and moving the head, and of course the way of moving both the head and the tail), at this time the zipper will gradually transition from a relaxed state to a straightened state, and the tension sensor can detect that the tension exceeds a certain threshold value (whether the head or the tail moves, the sensor is installed at the head or the tail, and the tension detection sensor detects the same threshold value) to stop moving, so that the zipper is in the desired straightened state.

[0064] Please refer to Figure 4 , Figure 4The structure schematic diagram of the zipper clamping mechanism provided by the embodiment of the present application.

[0065] Corresponding to the automatic zipper threading method, for the zipper clamping mechanism 3, the zipper clamping mechanism 3 is divided into a zipper head clamping mechanism and a zipper tail clamping mechanism according to different clamping positions of the zipper, in use, the two ends of the zipper are clamped by the zipper head clamping mechanism and the zipper tail clamping mechanism, after the zipper is straightened, the zipper head clamping mechanism and the zipper tail clamping mechanism are moved together to control the movement of the zipper, so as to align the zipper with the cloth piece, here the position of the cloth piece alignment is not limited, for example, it can be aligned with the head of the cloth piece. The movement process of the zipper head clamping mechanism and the zipper tail clamping mechanism can be independent, so the distance between the zipper head clamping mechanism and the zipper tail clamping mechanism can be adjusted, the zipper head clamping mechanism and the zipper tail clamping mechanism after adjusting the distance can clamp the zipper with different length sizes, and can straighten the zipper, which helps to improve the sewing effect after the zipper is aligned with the cloth piece.

[0066] The structure of the zipper head clamping mechanism and the zipper tail clamping mechanism is the same, as shown in Figure 4 , the zipper head clamping mechanism and the zipper tail clamping mechanism can be arranged opposite to each other.

[0067] Because the structure of the zipper head clamping mechanism and the zipper tail clamping mechanism is the same, only one structure is described here.

[0068] The zipper head clamping mechanism and the zipper tail clamping mechanism are both installed on the cloth feeding mechanism 2 through the first support column 201, and both include a cross beam 301, a control motor 302, a synchronous belt 303, a zipper lifting cylinder 304, a zipper clamping cylinder 305, a zipper clamping jaw group 306, a tension sensor 307 and a zipper clamping guide rail 308.

[0069] The cross beam 301 is fixed to the top end of the first support column 201, and is arranged transversely, and the zipper clamping guide rail 308 extending in the same direction is arranged on the cross beam 301, and the clamping assembly movable transversely is slidably installed on the zipper clamping guide rail 308, and the control motor 302, the driving wheel and the driven wheel are also installed on the cross beam 301, the moving end of the control motor 302 is connected with the driving wheel, the synchronous belt 303 is sleeved on the driving wheel and the driven wheel, and the synchronous belt installation plate is arranged on the synchronous belt 303, and the synchronous belt installation plate is connected with the clamping assembly, so as to realize the movement control of the clamping assembly by the control motor 302. The clamping assembly is used for clamping the zipper, the clamping assembly of the zipper head clamping mechanism is used for clamping the head of the zipper, and the clamping assembly of the zipper tail clamping mechanism is used for clamping the tail of the zipper.

[0070] The clamping assembly includes a zipper lifting cylinder 304, a zipper clamping cylinder 305, a zipper clamping jaw group 306, and a tension sensor 307. The clamping assembly further includes a cylinder mounting plate and a moving mounting plate, the zipper clamping cylinder 305 is mounted on the cylinder mounting plate, the zipper lifting cylinder 304 and the cylinder mounting plate are mounted on the moving mounting plate, and the moving mounting plate is connected with the synchronous belt mounting plate, so as to realize the movement control of the clamping assembly by the control motor 302. The zipper clamping jaw group 306 includes a lower clamp and an upper clamp, the upper side of the lower clamp is provided with a clamp limiting cavity, the clamp limiting cavity is used for engaging with the lower side of the upper clamp during the opposite movement of the lower clamp and the upper clamp, and the end of the lower clamp and the upper clamp is provided with a clamp head extending outward, the side of the clamp head facing the zipper is provided with a clamp positioning groove, and the clamp positioning groove is used for clamping the zipper when the lower clamp and the upper clamp engage. The lower clamp is fixed on the piston rod of the zipper lifting cylinder 304, the upper clamp is fixed on the piston rod of the zipper clamping cylinder 305, the zipper clamping cylinder 305 controls the upper clamp to clamp the zipper on the lower clamp when the zipper clamping cylinder 305 acts, and the zipper lifting cylinder 304 controls the zipper clamped in the upper clamp and the lower clamp (corresponding to the zipper 309 in Figure 4

[0071] It should be noted that the tension sensor 37 can be installed in the zipper head clamping mechanism or the zipper tail clamping mechanism, and the real-time tension of the zipper can be obtained through the tension detection of the clamping assembly in the transverse movement direction by the tension sensor 37 regardless of the movement of the head or the tail.

[0072] Please continue to refer to Figure 2 In some embodiments, S200 specifically includes: placing the cloth piece on the excess position mechanism 4; fixing the cloth piece through the excess position mechanism 4; and completing the excess position of the cloth piece through the excess position adjusting assembly.

[0073] In some embodiments, S200 further includes: when completing the excess position of the cloth piece through the excess position adjusting assembly, assigning the excess position size of each part of the cloth piece according to the process parameters of the cloth piece, and moving a plurality of pressing feet in the excess position adjusting assembly to positions corresponding to the excess position sizes of the parts respectively, to complete the excess position processing of the cloth piece before sewing.

[0074] In some embodiments, S200 further includes: after fixing the cloth piece through the excess position mechanism 4, moving the cloth piece to the lower side of the zipper through the excess position moving assembly.

[0075] In combination with the above embodiments, the processing of the cloth piece before sewing is as follows.

[0076] ​In the embodiment, the fixing of the cloth piece needs to be completed before sewing, and the cloth piece is placed under the zipper, and the corresponding slack movement is completed (the different between the zipper and the cloth piece material leads to the different of the thickness and softness of the upper and lower layers during sewing, in order to make the whole not arch and wrinkle after the zipper is sewn on the cloth piece, the slack movement needs to be performed on different cloth pieces before sewing). The slack adjustment assembly in the slack mechanism 4 is used to press and fix the cloth piece, and the front and rear moving assembly and the up and down moving assembly in the slack mechanism 4 are used to move the fixed cloth piece to the position under the zipper. The slack movement function is realized by a plurality of sets of slack adjustment assemblies on the slack mechanism 4, the controller specifies the slack size of each part of the cloth piece according to the process parameters of the cloth piece, and drives the slack adjustment assembly to move to the corresponding position, the slack adjustment assembly drives the cloth piece to move, and the slack of the cloth piece is completed, thus the processing before sewing of the cloth piece is completed.

[0077] Please refer to Figure 5 , Figure 5 The structure diagram of the slack mechanism provided by the embodiment of the application is shown.

[0078] Corresponding to the automatic sewing method, for the slack mechanism 4, the slack mechanism 4 includes the up and down moving assembly, the front and rear moving assembly and the slack adjustment assembly, in use, the slack adjustment assembly presses and fixes the cloth piece and drives the cloth piece to move, realizes the adjustment of the slack amount between the pressing positions of the cloth piece, and the up and down moving assembly and the front and rear moving assembly respectively drive the fixed cloth piece to move up and down and front and rear, and realize the movement of the fixed cloth piece to the position under the zipper. During the slack movement, the pressing position of the cloth piece controlled by the slack adjustment assembly moves, so that the actual distance between the pressing positions of the cloth piece is smaller under the premise that the pressing state of the cloth piece by the slack adjustment assembly does not change, but the length of the cloth piece between the pressing positions of the cloth piece does not change, which is equivalent to increasing the length of the cloth piece in the fixed distance, so as to realize the adjustment of the slack amount between the pressing positions of the cloth piece by the slack adjustment assembly, so that the cloth piece with the prepared slack amount can not arch and wrinkle after the zipper is sewn.

[0079] Both ends of the up and down moving assembly are installed on the cloth feeding mechanism 2 through the second support column 202, the front and rear moving assembly is installed on the up and down moving assembly, and the slack adjustment assembly is installed on the front and rear moving assembly. The up and down moving assembly includes a slack lifting cylinder 401, a slack lifting guide rail 402 and a slack lifting support 403, the front and rear moving assembly is installed on the slack lifting support 403, the slack lifting support 403 is slidably assembled on the slack lifting guide rail 402, the slack lifting cylinder 401 is connected with the slack lifting support 403, and the slack lifting cylinder 401 is used to control the up and down movement of the slack lifting support 403 along the slack lifting guide rail 402.

[0080] The front-back moving assembly comprises a redundant position moving back and forth guide rail 404, a redundant position moving back and forth cylinder 405 and a redundant position moving seat 406, the redundant position adjusting assembly is installed on the redundant position moving seat 406, the redundant position moving seat 406 is slidingly assembled on the redundant position moving back and forth guide rail 404, the redundant position moving back and forth cylinder 405 is connected with the redundant position moving seat 406, and the redundant position moving back and forth cylinder 405 is used for controlling the redundant position moving seat 406 to move back and forth along the redundant position moving back and forth guide rail 404.

[0081] The redundant position adjusting assembly comprises a screw motor 407, a redundant position adjusting guide rail 408, a scissor assembly 409 and cloth pressing feet 410, the cloth pressing feet 410 are used for pressing the cloth piece, the cloth pressing feet 410 are slidingly assembled on the redundant position adjusting guide rail 408, the cloth pressing feet 410 are connected through the scissor assembly 409, the cloth pressing feet 410 slide along the redundant position adjusting guide rail 408 to change the distance between the cloth pressing feet 410, thereby driving the cloth piece to move the redundant position and realizing the redundant position adjustment between the cloth piece pressing positions. The screw motor 407 controls the movement of the cloth pressing feet 410, thereby adjusting the redundant position of the cloth pressing feet 410 between the cloth piece pressing positions.

[0082] It should be noted that there are various control modes for the cloth pressing feet 410, including manual and automatic, and the automatic control mode includes but is not limited to motor screw, motor gear, motor synchronous belt and the like, which should belong to the description range of the embodiment.

[0083] In the use process of the automatic zipper sewing device, the zipper clamping mechanism 3 and the redundant position mechanism 4 are used in combination, the zipper clamping mechanism 3 is used to clamp and move the zipper, realize the alignment of the zipper and the cloth piece, and ensure the accurate placement of the zipper; the redundant position mechanism 4 is used to move the cloth piece in the redundant position, realize the automatic adjustment of the redundant position of the cloth piece, and solve the problem of automatic adjustment of the redundant position; the cloth feeding mechanism 2 is used to feed the relatively fixed zipper and cloth piece to the sewing machine 5; and the sewing machine 5 sews the zipper on the cloth piece.

[0084] For the redundant position adjusting assembly, more specifically, a plurality of cloth pressing feet 410 are assembled along the redundant position adjusting guide rail 408, each cloth pressing foot 410 corresponds to a pressing position acting on the cloth piece, the plurality of cloth pressing feet 410 are connected through the scissor assembly 409, the scissor assembly 409 comprises a plurality of groups of cross-hinged scissor plates, and the cloth pressing feet 410 are movably assembled on the center hinge positions of the scissor plates.

[0085] For each set of scissor plates, the first monomer and the second monomer of the cross intersection are hinged at the center position of the two monomers to form a center hinge position. For multiple sets of scissor plates, the first monomer of the scissor plates of the target set is hinged forwardly with the second monomer of the scissor plates of the previous set to form a lower edge hinge position, and the second monomer of the scissor plates of the target set is hinged forwardly with the first monomer of the scissor plates of the previous set to form an upper edge hinge position. On this basis, the multiple sets of scissor plates are repeatedly crossed, that is, the first monomer of the scissor plates of the target set is hinged backwardly with the second monomer of the scissor plates of the next set to form an upper edge hinge position, and the second monomer of the scissor plates of the target set is hinged backwardly with the first monomer of the scissor plates of the next set to form a lower edge hinge position.

[0086] In some cases, the plurality of sets of scissor assemblies 409 are adopted to divide the pressing feet 410 into calibration type pressing feet and driven type pressing feet. Different calibration type pressing feet are connected by different scissor assemblies 409, so that the movements of different calibration type pressing feet do not affect each other, and the driven type pressing feet are distributed on the scissor assemblies 409 between adjacent calibration type pressing feet, so that when a certain calibration type pressing foot moves, the adjacent driven type pressing feet to the calibration type pressing foot change the distance by the scissor assemblies 409.

[0087] In some embodiments, the calibration type pressing feet are divided into a head calibration type pressing foot located at the first end of the redundant position adjusting guide rail 408, a tail calibration type pressing foot located at the second end of the redundant position adjusting guide rail 408, and middle calibration type pressing feet located between the head calibration type pressing foot and the tail calibration type pressing foot on the redundant position adjusting guide rail 408. The middle calibration type pressing feet are divided into left calibration type pressing feet, right calibration type pressing feet, and middle calibration type pressing feet located between the left calibration type pressing feet and the right calibration type pressing feet on the redundant position adjusting guide rail 408. The left calibration type pressing feet and the right calibration type pressing feet are independently controlled by corresponding lead screw motors 407, and the middle calibration type pressing feet are manually controlled.

[0088] As an option, the number of linear lasers is five, which are respectively installed on the head calibration type pressing foot, the tail calibration type pressing foot, the left calibration type pressing foot, the right calibration type pressing foot, and the middle calibration type pressing foot. The linear laser emits a linear laser on the table to form a linear laser. The alignment with the feature points of the cloth is realized by the laser emitted by the linear laser.

[0089] Specifically, the head-end and tail-end alignment-type pressing feet are aligned with the head and tail of the cloth piece (equivalent to a garment piece) by the linear laser, then the alignment-type pressing feet are moved to align with the feature points on the garment piece, and the position information is saved in the electric control system. In this process, the left and right alignment-type pressing feet can be adjusted separately by the lead screw motor 407, while the middle alignment-type pressing feet can be manually adjusted and fixed. The number of common garment feature points is between 0 and 3. After the position is determined, the segmented redundancy can be performed, and the space between each linear laser can be regarded as a segment of uniform redundancy. According to the process requirements, the redundancy of each region of the same garment piece may not be consistent, for example, the region with a pocket is relatively thick, and the required redundancy is smaller than that of other regions. After such operation, the feature point positions and redundancy of the batch of garment pieces are confirmed, and the finished product after sewing is uniform.

[0090] Please continue to refer to Figure 2 In some embodiments, S300 specifically includes: the zipper is clamped by the zipper head clamping mechanism and the zipper tail clamping mechanism and is in a straightened state, the cloth piece is fixed on the redundancy mechanism 4 and completes the redundancy processing, the relative fixation of the zipper on the cloth piece is maintained by the relative static state of the zipper head clamping mechanism, the zipper tail clamping mechanism and the redundancy mechanism 4; the zipper head clamping mechanism, the zipper tail clamping mechanism and the redundancy mechanism 4 are installed on the cloth feeding mechanism 2, the moving speed of the zipper and the cloth piece relative to the head of the sewing machine 5 is controlled by controlling the moving speed of the cloth feeding mechanism 2; the needle of the head is controlled to sew the zipper on the cloth piece.

[0091] In some embodiments, S300 further includes: when controlling the moving speed of the cloth feeding mechanism 2, adjusting the working state of the cloth feeding mechanism 2 according to the position of the needle of the sewing machine 5; when the needle is above the cloth piece, controlling the cloth feeding mechanism 2 to switch to a low-speed running state; when the needle is below the cloth piece, controlling the cloth feeding mechanism 2 to switch to a high-speed running state.

[0092] In some embodiments, before adjusting the working state of the cloth feeding mechanism 2, the position and speed information of the needle of the head are obtained by controlling the motor of the head of the sewing machine 5.

[0093] In some embodiments, S300 further includes: when the needle moves from above the cloth piece to below the cloth piece and the needle moves from below the cloth piece to above the cloth piece, the cloth feeding mechanism 2 is controlled to smoothly transition between the low-speed running state and the high-speed running state in an S-shaped fitting manner.

[0094] In combination with the above embodiments, the processing of the cloth feeding mechanism 2 during sewing is as follows.

[0095] Please refer to Figure 6 and Figure 7 , Figure 6The displacement variation diagram of the fabric feeding mechanism provided by the embodiment of the application under one rotation of the machine head is shown in Figure 7 The speed variation diagram of the fabric feeding mechanism provided by the embodiment of the application under one rotation of the machine head is shown in

[0096] In the embodiment, the controller obtains the position and speed information of the machine head by controlling the external motor of the machine head of the sewing machine 5, and drives the fabric feeding mechanism 2 to move at different speeds according to the needle position.

[0097] The necessity of adjusting the working state of the fabric feeding mechanism 2 is explained as follows.

[0098] The most ideal control condition is to ensure that the fabric feeding mechanism 2 does not move when the needle penetrates the fabric, and the fabric feeding mechanism 2 moves when the needle is separated from the fabric. However, in actual conditions, the fabric feeding mechanism 2 will frequently start and stop, which requires high response of the fabric feeding mechanism 2 and is easy to cause noise and vibration, thereby affecting the sewing effect. Therefore, the control method adopted is that the fabric feeding mechanism 2 moves at a high speed when the needle is located in the upper half (the needle does not penetrate the fabric), and moves at a low speed when the needle is located in the lower half (the needle penetrates the fabric), and the S-shaped fitting mode is adopted in the transition section to smoothly transition, so as to reduce the influence of the movement of the fabric feeding mechanism 2 on the sewing when the needle penetrates the fabric by using the flexibility of the fabric itself, and to meet the sewing effect. The displacement and speed variation of the fabric feeding mechanism 2 under one rotation of the machine head are shown in Figure 6 and Figure 7 .

[0099] It should be noted that in the method, the sewing movement processing of the fabric feeding mechanism 2 is directly controlled by the external motor to obtain the position information of the sewing machine, and the position information can also be obtained by reading the position information of the sewing machine through an encoder or by communicating with the main control of the sewing machine, which should belong to the scope of the description of the embodiment.

[0100] In the method, the movement mode of the fabric feeding mechanism 2 is to switch between high speed and low speed to cooperate with the machine head, Figure 6 and Figure 7 The high-low speed switching is S-shaped curve fitting, and trapezoidal, polynomial, and sine wave high-low speed switching modes can also be adopted, which should belong to the scope of the description of the embodiment.

[0101] At present, in the field of garment sewing, for most of the upper garments such as down jackets, combat clothes, etc., the process of sewing a zipper is required, and the zipper fabric and the left and right fabric pieces are sewn respectively. In the traditional zipper sewing method, the sewing is completed by manual operation of workers. Since the left and right pieces and the zipper fabric are sewn separately, it is necessary to ensure that the left and right sides of the finished product can be aligned by the zipper chain. Therefore, this process has high technical requirements for workers, has a high manual rework rate, and has a long sewing time.

[0102] In order to solve this problem, get rid of the need for manual zip, the application designs a kind of automatic zip sewing method, through the zip clamping mechanism 3 to realize the automatic straightening and position fixing of the zip, through the redundant position mechanism 4 to realize the position positioning and movement of each left and right cloth piece, and use the cloth feeding mechanism 2 and sewing machine 5 to move the cloth piece to realize the sewing of the zip.

[0103] Therefore, the application has the following advantages: through the automatic mode, the requirement of the worker's operation technology for the zip sewing process is greatly reduced, and the stability and uniformity of the sewing quality are ensured; the method provides that the tension change of the zip clamping movement is used to detect the tensioning state of the zip, the reliability is high, the actual length of the zip is not required to be known, the zip is straightened, and for the zip of different materials, only the tension detection threshold needs to be changed, and the adjustment is convenient; the method provides the redundant position processing of the cloth piece, avoids the sewing problems such as cloth piece arching and wrinkling caused by the difference between the cloth piece and the zip; the method provides the cloth feeding mechanism 2 as an automatic feeding device to cooperate with the control strategy of the sewing machine 5, through the switching of high and low speed, the requirement of the running torque of the feeding device is reduced under the condition of meeting the sewing effect, the vibration of the feeding system is reduced, so that the highest running speed of the feeding device can be improved, and the overall sewing efficiency is improved.

[0104] It should be noted that many components mentioned in the application are general standard components or components known to those skilled in the art, and their structure and principle can be known by the technical personnel through the technical manual or through the conventional experimental method.

[0105] It should be noted that in the present specification, the relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between the entities.

[0106] The automatic zip sewing method provided by the application is described in detail above. In this paper, specific examples are applied to explain the principles and implementation modes of the application, and the above description of the examples is only used to help understand the method and its core idea. It should be pointed out that for ordinary skilled personnel in the technical field, some improvements and modifications can be made to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A method for automatically sewing a zipper, characterized in that: include: S100, processing flow of the zipper before sewing: clamping the zipper and keeping the zipper in a straight state; S200, processing of the fabric piece before sewing: fixing the fabric piece and performing redundant processing on the fabric piece before sewing according to the difference between the fabric piece and the zipper material, with the fabric piece being located below the zipper; S300, processing flow when sewing the zipper and the cloth piece: keep the zipper relatively fixed on the cloth piece, control the moving speed of the zipper and the cloth piece relative to the head of the sewing machine, and control the needle of the head of the sewing machine to sew the zipper on the cloth piece.

2. The automatic zipper sewing method according to claim 1, characterized in that: The S100 specifically includes: Place the head of the zipper on the zipper head clamping mechanism, and place the tail of the zipper on the zipper tail clamping mechanism; Controlling the zipper head clamping mechanism and the zipper tail clamping mechanism to move in directions relatively away from each other; Keep the zipper stretched.

3. The automatic zipper sewing method according to claim 2, characterized in that: The S100 further includes: When controlling the zipper head clamping mechanism and the zipper tail clamping mechanism to move in relatively distant directions, the real-time tension of the zipper is detected by the tension and compression sensor; When the real-time tension of the zipper reaches the preset tension, it is determined that the zipper is in the desired straightened state, and the relative movement of the zipper head clamping mechanism and the zipper tail clamping mechanism is stopped.

4. The automatic zipper sewing method according to claim 1, characterized in that: The S200 specifically includes: Place the cloth piece in the redundant mechanism; Fixing the cloth piece through a redundant mechanism; The cloth pieces are made redundant by the redundant adjustment component.

5. The automatic zipper sewing method according to claim 4, characterized in that: The S200 further includes: When the cloth piece is passed through the redundant adjustment component to complete the redundant position, the redundant size of each part on the cloth piece is specified according to the process parameters of the cloth piece. By controlling the multiple sets of pressing feet in the redundant adjustment component to move to the positions corresponding to the redundant size of each part, the redundant processing before sewing the cloth piece is completed.

6. The automatic zipper sewing method according to claim 4, characterized in that: The S200 further includes: After the cloth piece is fixed by the redundant mechanism, the cloth piece is moved to the bottom of the zipper by the redundant moving component.

7. The automatic zipper sewing method according to claim 1, characterized in that: The S300 specifically includes: The zipper is clamped by the zipper head clamping mechanism and the zipper tail clamping mechanism and is in a straight state. The fabric is fixed on the redundant mechanism and the redundant process is completed. The zipper is kept relatively fixed on the fabric by the relative stillness of the zipper head clamping mechanism, the zipper tail clamping mechanism and the redundant mechanism. The zipper head clamping mechanism, the zipper tail clamping mechanism and the redundant mechanism are installed on the cloth feeding mechanism. The moving speed of the zipper and the cloth relative to the sewing machine head is controlled by controlling the moving speed of the cloth feeding mechanism. The needle of the machine head is controlled to sew the zipper onto the fabric.

8. The automatic zipper sewing method according to claim 7, characterized in that: The S300 further includes: When controlling the moving speed of the cloth feeding mechanism, the working state of the cloth feeding mechanism is adjusted according to the needle position of the sewing machine; When the needle is above the cloth, the cloth feeding mechanism is controlled to switch to a low-speed operation state; When the needle is located under the cloth piece, the cloth feeding mechanism is controlled to switch to a high-speed operation state.

9. The automatic zipper sewing method according to claim 8, characterized in that: Before adjusting the working state of the cloth feeding mechanism, the position speed information of the needle of the sewing machine head is obtained by controlling the motor of the sewing machine head.

10. The automatic zipper sewing method according to claim 8, characterized in that: The S300 further includes: When the needle moves from above the cloth piece to below the cloth piece and from below the cloth piece to above the cloth piece, the cloth feeding mechanism is controlled to smoothly transition between the low-speed operation state and the high-speed operation state using an S-shaped fitting method.

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