Sewing machine head test seam detection device

Abstract

The invention discloses a test seam detection device for a sewing machine head. The test seam detection device is characterized by comprising a machine head tool table and a feeding device. A to-be-tested machine head is detachably arranged on the machine head tool table. And the feeding device feeds the cloth to the to-be-tested machine head for sewing test. And the feeding device comprises a feeding panel, a second rack, a feeding manipulator, a template frame assembly and a manipulator control assembly. And the feeding panel is fixedly arranged on the second rack. The feeding mechanical arm drives the template frame assembly to feed cloth to a to-be-tested machine head on the machine head tool table for sewing, and the control mechanical arm assembly controls the to-be-tested machine head to conduct corresponding test sewing.

Description

Technical Field

[0001] This invention relates to the field of industrial automation technology, specifically to a test sewing detection device for detecting sewing machine heads. Background Technology

[0002] Before leaving the factory, sewing machine heads undergo various sewing tests (i.e., trial sewing) to ensure their reliability. These tests involve sewing with different stitch lengths and patterns. For example, a 5mm stitch length and a 1-meter length are tested to sew 5 pieces without thread breakage; a 2mm stitch length and a 1-meter length are also tested to sew 5 pieces without thread breakage. The total number of tests exceeds four types, involving more than 60 sewing attempts. Currently, all sewing machine heads are manually transported to the appropriate worktables, and then manually operated for sewing. This method is inefficient, requires a large workforce, and incurs high labor costs. There is currently no automated testing device for sewing machine heads. Summary of the Invention

[0003] The purpose of this invention is to provide a simple, easy-to-operate, and efficient test sewing device for sewing machine heads.

[0004] The basic technical solution for achieving the objective of this invention is: a sewing machine head test sewing device, characterized by comprising a machine head fixture and a feeding device. The machine head to be tested is detachably mounted on the machine head fixture. The feeding device feeds fabric to the machine head to be tested for sewing tests. The feeding device includes a feeding panel, a second frame, a feeding robot, a template frame assembly, and a control robot assembly. The feeding panel is fixedly mounted on the second frame. The feeding robot drives the template frame assembly to feed fabric to the machine head to be tested on the machine head fixture for sewing, and the control robot assembly controls the machine head to perform corresponding test sewing.

[0005] Furthermore, to improve efficiency and facilitate the replacement of the test head: the feeding device is equipped with a connection station, and the test head fixture can be detachably and fixedly connected to the connection station of the feeding device.

[0006] Furthermore, to ensure the stability of the feeding: the feeding panel of the feeding device and the corresponding position of the second frame are provided with installation notches. These installation notches form the connection station of the feeding device, so that the feeding panels on both the left and right sides of the test head support the template frame assembly, ensuring the stability of the template frame assembly operation.

[0007] Furthermore, to facilitate the connection between the machine head tooling table and the feeding device: the machine head tooling table includes a machine head mounting plate, a first frame, and a first connecting assembly. The machine head mounting plate is fixedly mounted on the first frame. The feeding device also includes a second connecting assembly. The machine head tooling table is detachably and fixedly connected to the connecting station of the feeding device through the mutual cooperation of the first connecting assembly and the second connecting assembly of the feeding device.

[0008] Furthermore, to improve efficiency, the first connecting assembly includes two positioning plates, each with positioning holes. The two positioning plates are respectively fixedly mounted on the left and right rear sides of the machine head mounting plate.

[0009] The second connecting assembly includes two connecting cylinders. The two connecting cylinders are fixedly mounted on the second frame, corresponding to the two positioning plates of the first connecting assembly on the machine head tooling table.

[0010] Furthermore, to improve efficiency and ensure accurate installation, the feeding device also includes a tooling table guide assembly. The tooling table guide assembly includes two sets of guide rollers, which are respectively located on the upper left and right sides of the connecting station, below the feeding panel.

[0011] Furthermore, for ease of feeding: the feeding robot includes a template frame connecting seat, an X-axis drive device, and a Y-axis drive device. The X-axis drive device drives the template frame connecting seat to move in the X-axis direction, and the Y-axis drive device drives the template frame connecting seat to move in the Y-axis direction. The template frame assembly includes a base frame, a pressure plate frame, and a connecting seat. A reinforcing beam is provided along the X-axis on the base frame. The pressure plate frame is hinged to the base frame and can be opened and closed. The connecting seat is fixedly mounted on the base frame. The connecting seat is fixedly connected to the template frame connecting seat.

[0012] Furthermore, to accommodate different sewing test requirements, the machine head fixture also includes a mode switching switch, which is fixedly mounted on the right side of the machine head mounting plate. The control robot assembly includes a mode switching robot, which is used to operate the mode switching switch.

[0013] Furthermore, for controlling the test machine head, the machine head fixture also includes a set of foot switches. The control robot assembly includes a first mounting base, a first drive unit, a sewing robot, and a thread-cutting robot. Both the sewing robot and the thread-cutting robot are mounted on the first mounting base, and the first drive unit drives the first mounting base to move up and down. The sewing robot and the thread-cutting robot are respectively used to control the corresponding foot switches.

[0014] Furthermore, for controlling the test head: the test head fixture also includes a presser foot lift switch. The control robot assembly includes a presser foot lift robot, which is used to control the presser foot lift switch.

[0015] Furthermore, to control the test head and achieve diverse testing, the control robot assembly includes a close-sewing robot and a backstitch robot. The close-sewing robot is fixedly mounted on the second frame and is used to control the close-sewing switch on the body of the test head 100. The backstitch robot is fixedly mounted on the second frame and is used to control the backstitching switch on the body of the test head 100.

[0016] The present invention has the following beneficial effects: (1) The sewing test device for testing sewing machine heads of the present invention has a simple structure. By controlling the various robotic arms of the robotic arm assembly, the sewing test head to be tested can be operated to perform various sewing tests, such as different stitch lengths and different lengths. The whole process has a high degree of automation. While one device is being tested, the worker can operate another sewing test device for sewing machine heads, which greatly improves efficiency and saves manpower. (2) The sewing machine head tooling table and the feeding device of the sewing machine head test device of the present invention adopt a separable design. One feeding device can be equipped with two sewing machine head tooling tables. While one sewing machine head tooling table is connected to the feeding device, the worker can install the sewing machine head to be tested on another sewing machine head tooling table, which helps to save waiting time and improve efficiency. (3) The sewing machine head test device of the present invention is equipped with a tooling table guide assembly, which facilitates the quick and accurate connection between the sewing machine head tooling table and the feeding device, thus improving efficiency. (4) The robotic arm mounting seat of the sewing machine head test device of the present invention is slidably set on the second frame, which facilitates avoidance when installing and connecting the first frame. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the sewing machine head test sewing detection device of the present invention.

[0018] Figure 2 for Figure 1 A top-down view.

[0019] Figure 3 for Figure 1 A diagram showing the view from the right.

[0020] Figure 4 From Figure 1 A diagram showing the view from the upper left front.

[0021] Figure 5 From Figure 1 A diagram showing the view from the upper right front.

[0022] Figure 6 From Figure 1 A schematic diagram of the feeding device when viewed from above.

[0023] Figure 7 From Figure 1 A schematic diagram of the feeding device when viewed from the upper left front.

[0024] Figure 8 From Figure 1 A schematic diagram of the feeding device when viewed from the upper right front.

[0025] Figure 9 From Figure 1 The diagram shows the feeding robot when viewed from the lower right rear.

[0026] Figure 10 This is a schematic diagram of the machine head tooling table.

[0027] Figure 11 This is a schematic diagram showing the template frame connector and template frame components connected together.

[0028] Figure 12 This is a structural diagram of the template frame component.

[0029] The labels in the attached diagram are: Machine head tooling table 1, machine head mounting plate 1-1, first frame 1-2, first connecting assembly 1-3, positioning plate 1-31, positioning hole 1-311, mode switch 1-4, foot switch 1-5. Feeding device 2, connecting station 20, feeding panel 2-1, second frame 2-2, second connecting assembly 2-3 Feeding robot 2-4, template frame connecting seat 2-41, positioning socket 2-411. Robotic arm X-axis drive device 2-42, robotic arm Y-axis drive device 2-43 Template frame component 2-5, base plate frame 2-51, reinforcing beam 2-511, pressure plate frame 2-52, handle ball 2-521, connecting seat 2-53, positioning plug-in column 2-54, positioning groove 2-541. Control robot assembly 2-6, first mounting base 2-61, first drive device 2-62, sewing robot 2-63, thread cutting robot 2-64, mode switching robot 2-65, tight sewing robot 2-66, backstitch robot 2-67, presser foot lifting robot 2-68 Warning device 2-7, tooling table guide assembly 2-8, test head 100, fabric 200. Detailed Implementation

[0030] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. The orientation of the invention is described according to... Figure 1 Proceeding in the indicated direction, that is Figure 1 The up, down, left, and right directions shown are the same as the directions described. Figure 1 The direction one faces is the front, and the direction one turns away from is the back. Figure 1 The side that is in front is the rear. Figure 1 The left and right directions are the X direction. Figure 1 The front-back direction is Y-direction. The terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention or simplifying the description, and do not indicate a specific orientation that must be present.

[0031] (Example 1) See Figures 1 to 12 The sewing machine head test device of the present invention includes a machine head fixture 1 and a feeding device 2. The machine head 100 to be tested is mounted on the machine head fixture 1. The feeding device 2 is provided with a connecting station 20, and the machine head fixture 1 is detachably and fixedly connected to the connecting station 20 of the feeding device 2. The feeding device 2 feeds the fabric to the machine head 100 to be tested for sewing tests.

[0032] See Figures 1 to 5 and Figure 10 The machine head tooling table 1 includes a machine head mounting plate 1-1, a first frame 1-2, a first connecting assembly 1-3, a mode switching switch 1-4, a foot switch 1-5, and a foot lift switch (not shown in the figure). The machine head mounting plate 1-1 is fixedly mounted on the first frame 1-2, which is a height-adjustable frame, allowing the height of the machine head mounting plate 1-1 to be adjusted. The first frame 1-2 is equipped with casters for easy movement. The first connecting assembly 1-3 is used for positioning and fixing connection with the feeding device 2. The first connecting assembly 1-3 includes two positioning plates 1-31, each with positioning holes 1-311. The two positioning plates 1-31 are respectively fixedly mounted on the left and right rear sides of the machine head mounting plate 1-1. The mode switching switch 1-4 is fixedly installed on the right side of the machine head mounting plate 1-1, and is used to switch the different stitch length sewing modes of the machine head 100 under test. In this embodiment, the machine head 100 under test includes a 2mm stitch length sewing mode (hereinafter referred to as short stitch) and a 4mm stitch length sewing mode (hereinafter referred to as long stitch). There are three foot switches 1-5, which are fixedly installed on the lower part of the first frame 1-2 from front to back. In this embodiment, only two of the foot switches 1-5 are used when testing the machine head 100 under test. The middle foot switch 1-5 is used to control the start of sewing of the machine head 100 under test, and the rear foot switch 1-5 is used to control the thread cutting of the machine head 100 under test. The presser foot switch is a knee rest switch in the prior art, and the presser foot switch is fixedly installed on the lower right side of the machine head mounting plate 1-1. The machine head 100 under test in this embodiment has a built-in close-stitch switch and a backstitch sewing switch (not shown in the figure).

[0033] See Figures 1 to 9 , Figure 11 and Figure 12 The feeding device 2 includes a feeding panel 2-1, a second frame 2-2, a second connecting assembly 2-3, a feeding robot 2-4, a template frame assembly 2-5, a control robot assembly 2-6, a warning device 2-7, and a tooling table guide assembly 2-8. In this embodiment, the warning device 2-7 is a warning light, which includes three colors of light: a red light indicates a fault alarm, a yellow light indicates a standby state, and a green light indicates a sewing state.

[0034] The feeding panel 2-1 is fixedly mounted on the second frame 2-2. The feeding panel 2-1 and the second frame 2-2 are provided with mounting notches at corresponding locations, which form the connection station 20 of the feeding device 2.

[0035] The machine head fixture 1 is detachably and fixedly connected to the connection station 20 of the feeding device 2 through the cooperation of the first connecting assembly 1-3 and the second connecting assembly 2-3 of the feeding device 2. The upper surface of the machine head mounting plate 1-1 of the machine head fixture 1 is flush with the upper surface of the feeding panel 2-1. The second connecting assembly 2-3 includes two connecting cylinders 2-31. The two connecting cylinders 2-31 are fixedly mounted on the second frame 2-2, corresponding to the two positioning plates 1-31 of the first connecting assembly 1-3 on the machine head fixture 1. In use, the end of the cylinder rod of the connecting cylinder 2-31 is inserted into the positioning hole 1-311 of the positioning plate 1-31, thereby forming a plug-in fixed connection.

[0036] The feeding robot 2-4 includes a template frame connecting seat 2-41, an X-axis drive device 2-42, and a Y-axis drive device 2-43. The X-axis drive device 2-42 drives the template frame connecting seat 2-41 to move in the X-axis direction, and the Y-axis drive device 2-43 drives the template frame connecting seat 2-41 to move in the Y-axis direction. The X-axis drive device 2-42 uses a synchronous belt linear module, and the Y-axis drive device 2-43 uses a ball screw linear module. The Y-axis drive device 2-43 is fixedly mounted on the slide of the synchronous belt linear module, thus the X-axis drive device 2-42 drives the Y-axis drive device 2-43 to move in the X-axis direction. The template frame connecting seat 2-41 is fixedly mounted on the slide of the ball screw linear module, thus the Y-axis drive device 2-43 drives the template frame connecting seat 2-41 to move in the Y-axis direction.

[0037] The template frame connecting seat 2-41 is provided with positioning holes 2-411. In this embodiment, there are two positioning holes 2-411. The two positioning holes 2-411 are arranged sequentially along the X direction, and the axis of each positioning hole 2-411 is arranged along the front and back direction.

[0038] The template frame assembly 2-5 includes a base frame 2-51, a pressure plate frame 2-52, and a connecting seat 2-53. A reinforcing beam 2-511 is provided along the X-direction of the base frame 2-51. The pressure plate frame 2-52 is hinged to the base frame 2-51 and can be opened and closed. A handle ball 2-521 is provided on the pressure plate frame 2-52 for easy opening and closing. Fabric 200 is fixedly installed in the base frame 2-51 and the pressure plate frame 2-52. The connecting seat 2-53 is fixedly installed on the base frame 2-51. The connecting seat 2-53 has a positioning insertion post 2-54 corresponding to the positioning insertion hole 2-411. The positioning insertion post 2-54 is inserted into the corresponding positioning insertion hole 2-411, and then the connecting seat 2-53 is fixedly connected to the template frame connecting seat 2-41 by screws.

[0039] The control robot assembly 2-6 includes a first mounting base 2-61, a first drive device 2-62, a sewing robot 2-63, a thread-cutting robot 2-64, a mode-switching robot 2-65, a close-sewing robot 2-66, a backstitch robot 2-67, and a presser foot lifting robot 2-68.

[0040] The first mounting base 2-61 is slidably mounted on the second frame 2-2 in the vertical direction, located on the lower left front part of the connecting station 20. In this embodiment, the first mounting base 2-61 is slidably mounted on the second frame 2-2 in the vertical direction via corresponding linear guide rails. The first driving device 2-62 includes a mounting base driving cylinder, which is fixedly mounted on the second frame 2-2, located on the lower left front part of the connecting station 20. The end of the cylinder rod of the mounting base driving cylinder extends downward and is fixedly connected to the first mounting base 2-61, driving the first mounting base 2-61 to move up and down.

[0041] The sewing robot 2-63 includes a sewing cylinder, which is fixedly mounted on the front of the first mounting base 2-61, with the end of the cylinder rod extending downwards. The sewing cylinder is used to control a foot switch 1-5 located in the middle, thereby realizing the sewing operation of the test head 100.

[0042] The thread-cutting robot 2-64 includes a thread-cutting cylinder, which is fixedly mounted on the rear of the first mounting base 2-61, with the end of the cylinder rod extending downwards. The thread-cutting cylinder controls a foot switch 1-5 located on the rear side, thereby enabling the thread-cutting operation after the sewing of the test machine head 100 is completed.

[0043] The mode-switching robot 2-65 includes a mode-switching cylinder, which is fixedly mounted on the second frame 2-2, located at the front left side of the connecting station 20. When the machine head tooling table 1 is fixedly connected to the connecting station 20 of the feeding device 2, the end of the cylinder rod of the mode-switching cylinder extends out, allowing the mode-switching switch 1-4 to be pressed.

[0044] The tight-sewing robot 2-66 includes a tight-sewing cylinder, which is fixedly mounted on the second frame 2-2, located on the upper left side of the machine head mounting plate 1-1 of the machine head tooling table 1 at the connecting station 20. When the machine head tooling table 1 is fixedly connected to the connecting station 20 of the feeding device 2, the end of the cylinder rod of the tight-sewing cylinder extends out, which can press to operate the tight-sewing switch on the body of the machine head 100 to be tested.

[0045] The backstitching robot 2-67 includes a backstitching cylinder, which is fixedly mounted on the second frame 2-2, located on the upper left side of the head mounting plate 1-1 of the head tooling table 1 at the connecting station 20. When the head tooling table 1 is fixedly connected to the connecting station 20 of the feeding device 2, the end of the cylinder rod of the backstitching cylinder extends out, which can press to operate the backstitching switch on the body of the head to be tested 100.

[0046] The foot-lifting robot 2-68 includes a foot-lifting cylinder, which is fixedly mounted on the second frame 2-2, located on the lower left side of the head mounting plate 1-1 of the head tooling table 1 at the connecting station 20. When the head tooling table 1 is fixedly connected to the connecting station 20 of the feeding device 2, the end of the cylinder rod of the foot-lifting cylinder extends and presses against the foot-lifting switch (i.e., simulating the action of pressing the knee switch by the knee part during manual operation), thereby controlling the foot-lifting switch on the body of the test head 100. The tooling table guide assembly 2-8 includes two sets of guide rollers 2-81, which are respectively located on the upper left and right sides of the connecting station 20, below the feeding panel 2-1. The two sets of guide rollers 2-81 are arranged opposite each other, and the left and right sides of the head mounting plate 1-1 of the head tooling table 1 are in rolling contact with the two sets of guide rollers 2-81. The front of the two sets of guide rollers 2-81 is arranged in a figure-eight shape, which has a guiding function and facilitates the sliding of the machine head tooling table 1 into the connecting station 20.

[0047] When using the sewing machine head test sewing detection device of the present invention, first separate the machine head fixture 1 from the feeding device 2, and install the machine head 100 to be tested on the machine head mounting plate 1-1 of the machine head fixture 1. Then connect the machine head fixture 1 to the feeding device 2. After the connection is completed, the feeding robot 2-4 drives the template frame assembly 2-5 to send the starting point of the fabric 200 to the machine head 100 to be tested. The presser foot lifting robot 2-68 operates the presser foot lifting switch to lower the presser foot. Then the starting sewing robot 2-63 controls a foot switch 1-5 located in the middle to start the machine head 100 to start sewing. After sewing one stitch, the thread cutting robot 2-64 controls a foot switch 1-5 located on the rear side to cut the thread. Then, the presser foot lifting robot 2-68 operates the presser foot lifting switch to lift the presser foot. After the presser foot is lifted, the feeding robot 2-4 drives the template frame assembly 2-5 to send the next seam point of the fabric 200 to the test head 100 for a second test sewing. Depending on the test requirements, the mode switching robot 2-65 can also operate the mode switching switch 1-4 to switch between different stitch length sewing modes. The close-sewing robot 2-66 operates the close-sewing switch for dense sewing, and the backstitch robot 2-67 operates the backstitch sewing switch for reverse and forward sewing. This enables various sewing tests. The entire process is highly automated. While testing, workers can make full use of their time to install another test head onto the corresponding head fixture 1. After the test is completed, the next test head can be immediately replaced, greatly improving efficiency. The warning device 2-7 allows for real-time monitoring of the equipment status, facilitating timely handling and further improving efficiency and safety.

[0048] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sewing head test sewing detection device, characterized by: The utility model provides a sewing test device for machine head, including head tooling platform (1) and feeding device (2), the machine head (100) to be tested is detachably arranged on head tooling platform (1), and the cloth is sent to the machine head (100) to be tested by feeding device (2) and carries out sewing test, feeding device (2) includes feeding panel (2-1), second rack (2-2), feeding manipulator (2-4), template frame assembly (2-5) and control manipulator assembly (2-6), feeding panel (2-1) is fixedly arranged on second rack (2-2), and the cloth (200) is sent to the machine head (100) to be tested on head tooling platform (1) by template frame assembly (2-5) driven by feeding manipulator (2-4) and carries out sewing, and the machine head (100) to be tested is controlled by control manipulator assembly (2-6) and carries out corresponding test sewing.

2. The sewing head test sewing detection device according to claim 1, characterized in that: The feeding device (2) is provided with a connecting station (20), and the head tooling platform (1) is detachably fixedly connected in the connecting station (20) of the feeding device (2).

3. The sewing machine head test sewing detection device according to claim 2, characterized in that: The feeding panel (2-1) of the feeding device (2) and the corresponding part of the second rack (2-2) are provided with a mounting gap, and the connecting station (20) of the feeding device (2) is formed at the mounting gap.

4. The sewing head test sewing detection device according to claim 2, characterized in that: The head tooling platform (1) includes a head mounting table plate (1-1), a first rack (1-2), and a first connecting assembly (1-3); the head mounting table plate (1-1) is fixedly arranged on the first rack (1-2); the feeding device (2) further includes a second connecting assembly (2-3); the head tooling platform (1) is detachably fixedly connected in the connecting station (20) of the feeding device (2) through the mutual cooperation of the first connecting assembly (1-3) and the second connecting assembly (2-3) of the feeding device (2).

5. The sewing machine head test sewing detection device according to claim 1, characterized in that: The feeding device (2) further includes a tooling table guiding assembly (2-8); the tooling table guiding assembly (2-8) includes two groups of guiding rollers (2-81), and the two groups of guiding rollers (2-81) are respectively arranged at the upper left and right sides of the connecting station (20) and below the feeding panel (2-1).

6. The sewing head test sewing detection device according to claim 1, characterized in that: The feeding manipulator (2-4) includes a template frame connecting seat (2-41), a manipulator X-direction driving device (2-42), and a manipulator Y-direction driving device (2-43); the manipulator X-direction driving device (2-42) drives the template frame connecting seat (2-41) to move in the X direction, and the manipulator Y-direction driving device (2-43) drives the template frame connecting seat (2-41) to move in the Y direction; the template frame assembly (2-5) includes a bottom plate frame (2-51), a pressing plate frame (2-52), and a connecting seat (2-53); the bottom plate frame (2-51) is provided with a reinforcing beam (2-511) in the X direction; the pressing plate frame (2-52) is hingedly connected to the bottom plate frame (2-51) and can be opened and closed; the connecting seat (2-53) is fixedly arranged on the bottom plate frame (2-51); and the connecting seat (2-53) is fixedly connected to the template frame connecting seat (2-41).

7. The sewing head test sewing detection device according to one of claims 1 to 6, characterized in that The head tooling table (1) further comprises a mode switching switch (1-4) fixedly arranged on the right side of the head mounting table plate (1-1); the control manipulator assembly (2-6) comprises a mode switching manipulator (2-65) for controlling the mode switching switch (1-4).

8. The sewing head test sewing detection device according to one of claims 1 to 6, characterized in that The head tooling table (1) further comprises a group of foot switches (1-5); the control manipulator assembly (2-6) comprises a first mounting seat (2-61), a first driving device (2-62), a stitch-up manipulator (2-63) and a thread cutting manipulator (2-64); the stitch-up manipulator (2-63) and the thread cutting manipulator (2-64) are arranged on the first mounting seat (2-61), and the first driving device (2-62) drives the first mounting seat (2-61) to move up and down; the stitch-up manipulator (2-63) and the thread cutting manipulator (2-64) are respectively used for controlling the corresponding foot switch (1-5).

9. The sewing head test sewing detection device according to one of claims 1 to 6, characterized in that: The head tooling table (1) further comprises a presser foot lifting switch; the control manipulator assembly (2-6) comprises a presser foot lifting manipulator (2-68) for controlling the presser foot lifting switch.

10. The sewing head test sewing detection device according to one of claims 1 to 6, characterized in that The control manipulator assembly (2-6) comprises a stitch tight manipulator (2-66) and a needle back manipulator (2-67); the stitch tight manipulator (2-66) is fixedly arranged on the second rack (2-2) and is used for controlling the stitch tight switch on the body of the head under test 100; the needle back manipulator (2-67) is fixedly arranged on the second rack (2-2) and is used for controlling the needle back sewing switch on the body of the head under test 100.

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