Zipper sewing machine

Abstract

The utility model relates to the technical field of zipper production, in particular to a zipper sewing machine which comprises a rack and a sewing machine body arranged on the rack, a roller mechanism used for pulling a sewn zipper is arranged at the rear end of a sewing mechanism of the sewing machine body, the zipper sewing machine further comprises a PLC, and the roller mechanism comprises a driving wheel and a pinch roller which are arranged in a tangent mode. A zipper is clamped between the driving wheel and the pinch roller, the driving wheel is provided with a first servo motor used for driving the driving wheel to rotate and a roller encoder used for detecting the feeding amount of a roller in real time, and the first servo motor and the roller encoder are respectively and electrically connected with the PLC. The zipper sewing machine has the advantages that unstable stitch length caused by abrasion of parts can be reduced, roller speed and stitch length can be adjusted at any time, the PLC and the roller encoder can calculate and display the stitch length of the zipper sewing machine in real time, and quality monitoring of finished zipper products and equipment maintenance efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of zipper production equipment, and more specifically, to a zipper sewing machine. Background Art

[0002] A zipper is a connecting piece that relies on continuously arranged chain teeth to join or separate items, and is now widely used in various fields such as civil, aerospace, aviation, military, and medical. A zipper sewing machine is a machine that stitches chain teeth and a fabric tape together. In order to improve work efficiency, existing zipper sewing machines usually have a roller wheel group for automatically conveying the zipper designed on the sewing machine, and the main motor shaft of the zipper sewing machine drives the roller wheel group to rotate through a transmission mechanism. However, existing zipper sewing machines do not have the function of monitoring the stitch pitch (i.e., the needle pitch) of the zipper sewing machine, and parts such as the roller wheel group, the transmission mechanism that drives its rotation, and the zipper sewing size adjustment mechanism often wear out, which will affect the stability of the zipper stitch pitch after wear. Moreover, the wear of parts and the measurement of the stitch pitch can only be discovered during regular machine repair adjustments or when quality inspectors inspect the finished zippers, seriously affecting the efficiency and quality of zipper sewing operations. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a zipper sewing machine to solve the above problems.

[0004] The utility model adopts the following technical solutions:

[0005] A zipper sewing machine includes a frame and a sewing machine main body disposed on the frame. A roller mechanism for pulling the sewn zipper is provided at the rear end of the sewing mechanism of the sewing machine main body. It also includes a PLC programming controller. The roller mechanism includes a driving wheel and a pressure wheel arranged in tangency, and the zipper is clamped between the driving wheel and the pressure wheel. A first servo motor for driving the driving wheel to rotate and a roller encoder for real-time detecting the roller feed amount are provided on the driving wheel. The first servo motor and the roller encoder are respectively electrically connected to the PLC programming controller.

[0006] Further, a motion module for controlling the rotation action of the first servo motor is provided in the PLC programming controller.

[0007] Further, the main shaft motor of the sewing machine main body is a second servo motor, and the second servo motor is electrically connected to the PLC programming controller.

[0008] Further, the roller mechanism further includes a driving shaft mounted on the frame. The driving shaft is connected to the output shaft of the first servo motor through a coupling. The driving wheel is fixedly connected to the driving shaft. The pressure wheel is disposed above the driving wheel, and a pressing adjustment bracket for pressing the pressure wheel onto the driving wheel is provided on the pressure wheel.

[0009] Furthermore, a recessed groove for the zipper teeth to sink into is provided around the middle of the outer side wall of the driving wheel.

[0010] From the above description of the structure of the present utility model, compared with the prior art, the present utility model has the following advantages:

[0011] 1. In the roller mechanism of the present utility model, a servo motor is used for independent and direct drive to minimize the indirect drive of other transmission mechanisms as much as possible, thereby reducing the uneven stitch pitch caused by part wear. At the same time, the roller speed can be adjusted at any time through the servo motor, so as to replace the existing stitch pitch adjustment mechanism of the zipper sewing machine to adjust the stitch pitch and improve the machine adjustment speed when the tooth pitch tolerance exceeds the standard.

[0012] 2. The present utility model detects the real-time roller feed of the driving wheel through a roller encoder, and through the action of the first servo motor motion module built in the PLC coding controller, calculates and displays the stitch pitch of the zipper sewing machine in real time, thereby improving the quality monitoring of the zipper finished product and the equipment maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the present utility model.

[0014] Figure 2 It is a schematic structural diagram of the transmission mechanism of the present utility model.

[0015] Figure 3 It is a schematic structural diagram of the roller mechanism of the present utility model.

[0016] Figure 4 It is a block diagram of the control circuit structure of the present utility model.

[0017] Among them, the reference numerals in the figure are: frame 10, sewing machine main body 20, sewing mechanism 21, roller mechanism 30, driving wheel 31, recessed groove 311, traction gear 312, pressure belt wheel 32, driving shaft 33, pressing adjustment bracket 34, coupling 35, first servo motor 40, second servo motor 50, PLC coding controller 60, roller encoder 70, motion module 80. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following describes the specific implementation manners of the embodiments of the present utility model with reference to the drawings.

[0019] Referring to Figure 1 and Figure 2 , a zipper sewing machine includes a frame 10, a sewing machine main body 20 and a PLC programming controller provided on the frame 10. In this embodiment, the sewing machine main unit can select a conventional electric sewing machine on the market, such as the Xingrui sewing machine HR3200 series sewing machines, and improve the main shaft motor of the sewing machine main body 20 and replace it with a second servo motor 50.

[0020] Referring to Figures 2 to 4 , a roller mechanism 30 for pulling the sewn zipper is provided at the rear end of the sewing mechanism of the sewing machine main body 20. The roller mechanism 30 includes a driving wheel 31 and a pinch roller 32 which are arranged tangentially. The zipper is clamped between the driving wheel 31 and the pinch roller 32. A first servo motor 40 for driving the driving wheel 31 to rotate and a roller encoder 70 for real-time detection of the roller feed amount are provided on the driving wheel 31. More specifically, the roller mechanism 30 includes a driving shaft 33 mounted on the frame 10. The driving shaft 33 is connected to the output shaft of the first servo motor 40 through a coupling 35. The driving wheel 31 is fixedly connected to the driving shaft 33. A recessed groove 311 for the zipper teeth to sink into is provided around the middle of the outer side wall of the driving wheel 31. The pinch roller 32 is arranged above the driving wheel 31. A pressing adjustment bracket 34 for pressing or disengaging the pinch roller 32 from the driving wheel 31 is provided on the pinch roller 32. The PLC coding controller 60 is electrically connected to the first servo motor 40, the second servo motor 50 and the roller encoder 70 respectively. A motion module 80 for controlling the rotation actions of the first servo motor 40 and the second servo motor 50 is provided in the PLC coding controller 60.

[0021] Referring to Figures 1 to 4 , the roller mechanism 30 of the present utility model adopts an independent drive design. The driving wheel 31 of the roller mechanism 30 is driven independently and directly by the first servo motor 40, and the indirect transmission of other transmission mechanisms is reduced as much as possible, so as to reduce the needle pitch instability caused by part wear. Moreover, by directly driving the driving wheel 31 by the first servo motor 40 of the present utility model, the roller speed can be adjusted at any time, so as to replace the existing zipper sewing size adjustment mechanism to adjust the needle pitch and improve the machine adjustment speed when the tooth pitch tolerance exceeds the standard.

[0022] In addition, the present utility model detects the real-time roller feed amount of the driving wheel 31 through the roller encoder 70, and controls the action of the first servo motor 40 through the motion module 80 built in the PLC coding controller 60, and calculates and displays the needle pitch of the zipper sewing machine in real time. Due to the sewing characteristics of the zipper sewing machine, the roller mechanism 30 of the present utility model does not continuously rotate the driving wheel 31, but after the PLC coding controller 60 controls the first servo motor 40 to rotate a certain angle, it pauses for a while to allow the sewing mechanism of the sewing machine main body 20 to sew the first stitch, and then rotates a certain angle and continues to pause for a while to allow the sewing mechanism of the sewing machine main body 20 to sew the second stitch, and so on. The rotation angle of the first servo motor 40 between two adjacent pauses, that is, the distance of the zipper pulled by it is the needle pitch. The present utility model adopts the combination of the first servo motor 40 and the roller encoder 70, and the PLC coding controller 60 calculates and displays the needle pitch of the zipper sewing machine in real time, so as to improve the quality monitoring of the zipper finished product and the equipment maintenance.

[0023] The above is only the specific implementation manner of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantive modification made to the present utility model using this concept shall fall within the scope of infringement of the protection scope of the present utility model.

Claims

1. A zipper sewing machine, comprising a frame and a sewing machine body arranged on the frame, wherein a roller mechanism for pulling and sewing a zipper is provided at the rear end of a sewing mechanism of the sewing machine body, and characterized in that: It also includes a PLC programming controller, the roller mechanism includes a driving wheel and a belt pressure wheel arranged tangentially, the zipper clamp is arranged between the driving wheel and the belt pressure wheel, the driving wheel is provided with a first servo motor for driving its rotation and a roller encoder for real-time detection of the roller feed amount, the first servo motor and the roller encoder are electrically connected to the PLC programming controller respectively.

2. A zipper sewing machine according to claim 1, characterized in that: The PLC programming controller is provided with a motion module for controlling the rotational motion of the first servo motor.

3. A zipper sewing machine according to claim 1, characterized in that: The roller mechanism also includes a driving shaft mounted on the frame, the driving shaft is connected to the output shaft of the first servo motor through a coupling, the driving wheel is fixedly connected to the driving shaft, the belt pressure wheel is arranged above the driving wheel, and the belt pressure wheel is provided with a pressing adjustment bracket for pressing the belt pressure wheel onto the driving wheel.

4. A zipper sewing machine according to claim 1 or 3, characterized in that: A concave groove for the zipper teeth to sink into is arranged around the middle of the outer side wall of the driving wheel.

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