Broken thread detection device based on embroidery machine

Abstract

The utility model discloses a broken line detection device based on an embroidery machine, which comprises a base, and a plurality of embroidery coil seats with a fixing function are rotatably mounted on one side of the top of the base; two fixing plates are symmetrically and fixedly mounted at the top of the base, a plurality of threading holes penetrating to the other sides are formed in one sides of the outer surfaces of the two fixing plates, and photoelectric sensors are fixedly embedded in the inner walls of one sides of the plurality of threading holes; and a plurality of groups of contact type detection mechanisms are arranged between the two fixing plates. According to the utility model, through the cooperative work of the photoelectric sensor and the contact type detection mechanism (the encoder and the detection roller), the dual verification of optical detection and mechanical detection is realized: the photoelectric sensor quickly judges the existence of embroidery threads; the encoder accurately detects the actual motion state of the embroidery thread. The problem of misjudgment (such as transparent line / reflective line detection failure) and the problem of response delay of mechanical detection in traditional single photoelectric detection are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of thread breakage detection technology, and in particular to a thread breakage detection device based on an embroidery machine. Background Technology

[0002] An embroidery machine is an automated sewing device primarily used for embroidering patterns and text on various fabrics. Compared to traditional hand embroidery, it can complete embroidery tasks faster and more accurately, producing neater and more aesthetically pleasing results. An embroidery machine typically consists of a main body, embroidery needles, a control panel, etc., and is easy to operate. Embroidery machines can be used to produce various textiles, such as home textiles, clothing, and footwear.

[0003] The prior art disclosure number CN221501434U discloses a detection device for detecting thread breakage in an embroidery machine, which includes a base. Fixing screws are screwed to the four corners of the upper surface of the base. Protective plates are fixedly connected to both sides of the upper surface of the base. Several placement slots are opened on one side of the upper surface of the base between the protective plates. A limit post is fixedly connected to the middle position of the placement slot.

[0004] This device increases the detection range for broken threads and adapts to various thread sizes to prevent jitter. However, the solution has two major drawbacks: insufficient reliability—it only detects the presence of embroidery thread through photoelectric sensing of the thread hole, failing to distinguish between a broken thread (completely no signal) and a slack thread (the thread is drooping but not broken), leading to missed detections of abnormal tension; and lack of anti-interference—the optical detection logic is not optimized for different materials (such as transparent threads and reflective metallic threads) and colors (dark colors absorb light), making it prone to misjudgments due to differences in signal reflectivity (e.g., mistaking the strong reflection of reflective metallic threads for "having a thread," or misjudging the weak reflection of transparent threads as "broken threads"). A multimodal detection mechanism needs to be introduced to improve adaptability. Utility Model Content

[0005] This invention is a thread breakage detection device based on an embroidery machine, proposed to address the shortcomings of existing technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a thread breakage detection device based on an embroidery machine, comprising a base, wherein multiple embroidery coil holders with fixing functions are rotatably mounted on one side of the top of the base;

[0007] Two fixing plates are symmetrically fixedly installed on the top of the base. Multiple through holes are opened on one side of the outer surface of the two fixing plates, and photoelectric sensors are fixedly embedded on the inner wall of one side of the multiple through holes.

[0008] Multiple sets of contact-type detection mechanisms are provided between the two fixed plates;

[0009] Each of the multiple contact detection mechanisms includes two support seats, and the support seats are fixedly installed on the top of the base. A first spline shaft is rotatably embedded on one side of the outer surface of each of the two support seats, and a guide wheel is detachably fixedly installed on the outer surface of each of the two first spline shafts.

[0010] An adjustable support is provided between the two support seats. An encoder is fixedly installed on one side of the movable end of the adjustable support. The input shaft of the encoder passes through the movable end of the adjustable support and is fixedly connected to a second spline shaft. A detection roller is detachably fixed to the outer surface of the second spline shaft.

[0011] Furthermore, multiple indicator lights are fixedly installed on one side of the outer surface of each of the fixed plates, and the indicator lights correspond to the adjacent thread holes. The indicator lights can intuitively display the working status of each embroidery thread channel, making it easy to quickly locate the fault point.

[0012] Furthermore, an alarm is fixedly installed on one side of the top of the support base. The audible and visual alarm system can immediately alert the operator when a wire break occurs, thus preventing the production of defective products.

[0013] Furthermore, each of the multiple embroidery coil holders with fixing function includes a limiting roller, and the limiting roller is rotatably embedded in the top of the base. The top of the limiting roller is threadedly connected to a first screw, and the other end of the first screw is fixedly connected to a pressure roller. The threaded adjustment structure can adapt to embroidery coils of different specifications.

[0014] Furthermore, each of the multiple guide rollers includes a mounting sleeve, which is slidably fitted onto the outer surface of the first spline shaft. A first bolt is connected between the mounting sleeve and the first spline shaft, and the first bolt passes through the mounting sleeve and is threadedly connected to the first spline shaft. A guide roller is fixedly fitted onto the outer surface of the mounting sleeve. The modular design makes guide roller replacement more convenient and greatly shortens maintenance time.

[0015] Furthermore, each of the adjustable supports includes a mounting base, which is fixedly mounted on the top of the base. A knob is provided on one side of the mounting base, and a second screw is fixedly connected to one end of the knob. The second screw passes through the mounting base and is rotatably connected to it. A movable seat is threaded onto the outer surface of the second screw, and the movable seat slides in contact with the mounting base. An encoder is fixedly mounted on one side of the movable seat, and a second splined shaft is rotatably connected to the movable seat. This allows the position of the detection roller to be adjusted according to the wear condition, thus extending its service life.

[0016] Furthermore, each of the plurality of detection rollers includes a roller body, and the roller body is slidably sleeved on the outer surface of the second spline shaft. The roller body and the second spline shaft are connected by a second bolt, which passes through the roller body and is threadedly connected to the second spline shaft. This detachable structure design facilitates the replacement of the detection rollers.

[0017] The beneficial effects of this utility model are:

[0018] In use, this utility model, a thread breakage detection device based on an embroidery machine, achieves dual verification of optical and mechanical detection through the coordinated operation of a photoelectric sensor and a contact detection mechanism (encoder + detection roller): the photoelectric sensor quickly determines the presence of embroidery thread; the encoder accurately detects the actual movement state of the embroidery thread. This effectively solves the problems of misjudgment (such as failure to detect transparent / reflective threads) and response delay in traditional single photoelectric detection.

[0019] In use, this utility model is a thread breakage detection device based on an embroidery machine. The first spline shaft and the guide wheel are detachably fixed, which facilitates the replacement of the guide wheel. The second spline shaft and the detection roller are detachably fixed, which facilitates the replacement of the detection roller.

[0020] In use, this utility model is a thread breakage detection device based on an embroidery machine. Through the adjustable support, the contact position between the detection roller and the embroidery thread can be flexibly adjusted according to the actual wear condition, so that the wear area is evenly distributed, which not only ensures the detection accuracy, but also extends the service life of the detection roller. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 : A perspective view of this utility model;

[0023] Figure 2 : A schematic diagram of the guide wheel installation of this utility model;

[0024] Figure 3 : Schematic diagram of the installation of the detection roller of this utility model;

[0025] Figure 4 Side view of this utility model;

[0026] Figure 5 : Front view of the fixing plate of this utility model.

[0027] The attached figures are labeled as follows:

[0028] 1. Base; 2. Indicator light; 3. Alarm; 4. Fixing plate; 5. Limit roller; 6. Pressure roller; 7. Support seat; 8. Encoder; 9. First bolt; 10. Mounting sleeve; 11. Wire wheel; 12. First splined shaft; 13. Movable seat; 14. Second bolt; 15. Roller body; 16. Second splined shaft; 17. Knob; 18. Mounting seat; 19. Second screw; 20. First screw; 21. Photoelectric sensor; 22. Wire hole. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figures 1 to 5 As shown, a thread breakage detection device based on an embroidery machine is disclosed, comprising a base 1. Multiple embroidery thread holders with fixing functions are rotatably mounted on one side of the top of the base 1. Each of the multiple embroidery thread holders with fixing functions includes a limiting roller 5, and the limiting roller 5 is rotatably embedded in the top of the base 1. The limiting roller 5 and the base 1 are connected by a bearing. The inner ring of the bearing is fixedly connected to the limiting roller 5, and the outer ring of the bearing is fixedly connected to the base 1. A first screw 20 is threadedly connected to the top of the limiting roller 5, and a pressure roller 6 is fixedly connected to the other end of the first screw 20.

[0031] Two fixing plates 4 are symmetrically fixedly installed on the top of the base 1. Multiple through holes 22 are opened on one side of the outer surface of the two fixing plates 4, which lead to the other side. Photoelectric sensors 21 are fixedly embedded on the inner wall of one side of the multiple through holes 22. The photoelectric sensor 21 is model EE-SX671. Multiple indicator lights 2 are fixedly installed on one side of the outer surface of a single fixing plate 4, and the indicator lights 2 correspond to the adjacent through holes 22.

[0032] Multiple sets of contact detection mechanisms are provided between the two fixed plates 4.

[0033] Each of the multiple contact-type detection mechanisms includes two support seats 7, which are fixedly installed on the top of the base 1. A first splined shaft 12 is rotatably fitted onto one side of the outer surface of each of the two support seats 7. The first splined shaft 12 is connected to the support seat 7 by a bearing; the outer ring of the bearing is fixedly connected to the support seat 7, and the inner ring of the bearing is fixedly connected to the first splined shaft 12. Guide wheels are detachably and fixedly installed on the outer surfaces of both first splined shafts 12. Multiple guide wheels include mounting sleeves 10, which are slidably fitted onto the outer surface of the first splined shaft 12. A first guide wheel is connected to both the mounting sleeve 10 and the first splined shaft 12. A bolt 9 is provided, which passes through the mounting sleeve 10 and is threadedly connected to the first spline shaft 12. A spool 11 is fixedly fitted onto the outer surface of the mounting sleeve 10. A through hole is provided on the outer surface of the mounting sleeve 10, which matches the first bolt 9. A screw hole is provided on the outer surface of the first spline shaft 12, which matches the first bolt 9. When the spool 11 needs to be replaced, the first bolt 9 is unscrewed, and then the mounting sleeve 10 and the spool 11 are removed. Then, the new mounting sleeve 10 is fitted onto the outer surface of the first spline shaft 12, and the through hole is aligned with the screw hole. Finally, the first bolt 9 is screwed on.

[0034] An adjustable support is provided between two support bases 7. An encoder 8 is fixedly installed on one side of the movable end of the adjustable support. The input shaft of the encoder 8 passes through the movable end of the adjustable support and is fixedly connected to a second splined shaft 16. A detection roller is detachably fixed to the outer surface of the second splined shaft 16. Each of the multiple adjustable supports includes a mounting base 18, which is fixedly installed on the top of the base 1. A knob 17 is provided on one side of the mounting base 18. A second screw 19 is fixedly connected to one end of the knob 17, and the second screw 19 passes through the mounting base 18 and is rotatably connected to it. A movable seat 13 is threaded onto the outer surface of the second screw 19, and the movable seat 13 slides in contact with the mounting base 18. The encoder 8 is fixedly installed on one side of the movable seat 13, and the second splined shaft 16 is rotatably connected to the movable seat 13. Rotating the knob 17... A rubber pad is fixedly connected to the end, and the rubber pad abuts against the outer wall of the mounting base 18 to increase the friction of the knob 17 rotation, making it less likely to rotate due to vibration or other reasons. Multiple detection rollers each include a roller body 15, and the roller body 15 is slidably sleeved on the outer surface of the second spline shaft 16. The roller body 15 and the second spline shaft 16 are connected by a second bolt 14, which passes through the roller body 15 and is threadedly connected to the second spline shaft 16. A through hole is provided on the roller body 15, which matches the second bolt 14. A screw hole is provided on the outer surface of the second spline shaft 16, which matches the second bolt 14. When the roller body 15 needs to be replaced, the second bolt 14 is unscrewed, the roller body 15 is removed, and then the new roller body 15 is put on the second spline shaft 16, so that the through hole corresponds to the screw hole, and then the second bolt 14 is screwed on.

[0035] An alarm 3 is fixedly installed on one side of the top of the support 7.

[0036] Working principle: Embroidery thread path and initial detection

[0037] After the embroidery thread is led out from the embroidery coil holder, it passes through the thread holes 22 on the fixing plate 4 in sequence. The photoelectric sensor 21 embedded in the thread hole 22 monitors the status of the embroidery thread in real time. When the embroidery thread passes normally, the photoelectric signal remains connected; if the thread breaks, the photoelectric signal is interrupted and triggers a primary alarm.

[0038] Contact dynamic detection

[0039] After being guided by the guide roller 11, the embroidery thread continues to maintain contact with the detection roller:

[0040] During normal operation, the moving embroidery thread drives the detection roller to rotate, and the encoder 8 collects the rotation pulse signal in real time through the second spline shaft 16;

[0041] When a thread breakage or embroidery thread jam occurs, the detection roller stops rotating, the encoder 8 signal disappears, and a level 2 alarm is triggered.

[0042] Dual-mode collaborative judgment mechanism

[0043] The system achieves reliable judgment through the following logic:

[0044] Both photoelectric sensor 21 and encoder 8 have normal signals → running status;

[0045] The photoelectric signal is normal, but encoder 8 has no pulse → This is determined to be due to wire slack / slippage.

[0046] Photoelectric signal interruption and encoder 8 no pulse → confirmed disconnection;

[0047] The photoelectric signal is abnormal, but encoder 8 has pulses → the sensor is determined to be faulty.

[0048] Adaptive adjustment function

[0049] Adjusting the second screw 19 by knob 17 drives the movable seat 13 to move, thereby achieving wear position compensation adjustment (the movable seat 13 drives the detection roller to move via encoder 8 and second spline shaft 16).

[0050] Status Indicators and Alarms

[0051] Indicator light 2 displays the status of the embroidery thread in each thread hole 22 in real time. When a thread breakage occurs, alarm 3 will simultaneously activate an audible and visual alarm and quickly locate the fault through the indicator light 2 corresponding to the location.

[0052] It should be noted that, in actual use, the indicator light 2, alarm 3, encoder 8, photoelectric sensor 21 are electrically connected to the controller used by the embroidery machine to facilitate overall control. The specific data analysis and processing involved to further realize the control function are methods that can be implemented by those skilled in the art based on common knowledge. These methods are not within the scope of this solution. The above description is only to illustrate the beneficial effects that can be achieved by this hardware structure improvement in conjunction with common knowledge.

[0053] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A thread breakage detection device based on an embroidery machine, comprising a base (1), characterized in that: Multiple embroidery coil holders with fixing functions are rotatably installed on one side of the top of the base (1); Two fixing plates (4) are symmetrically fixedly installed on the top of the base (1). Multiple through holes (22) are opened on one side of the outer surface of the two fixing plates (4) and a photoelectric sensor (21) is fixedly embedded on the inner wall of one side of the multiple through holes (22). Multiple sets of contact detection mechanisms are provided between the two fixed plates (4); Each of the multiple contact detection mechanisms includes two support seats (7), and the support seats (7) are fixedly installed on the top of the base (1). One first spline shaft (12) is rotatably embedded on one side of the outer surface of each of the two support seats (7). A guide wheel is detachably fixedly installed on the outer surface of each of the two first spline shafts (12). An adjustable support is provided between the two support seats (7). An encoder (8) is fixedly installed on one side of the movable end of the adjustable support. The input shaft of the encoder (8) passes through the movable end of the adjustable support and is fixedly connected to a second spline shaft (16). A detection roller is detachably fixed on the outer surface of the second spline shaft (16).

2. The thread breakage detection device based on an embroidery machine according to claim 1, characterized in that: Multiple indicator lights (2) are fixedly installed on one side of the outer surface of each of the fixed plates (4), and the indicator lights (2) correspond to the adjacent wire holes (22).

3. The thread breakage detection device based on an embroidery machine according to claim 1, characterized in that: An alarm (3) is fixedly installed on one side of the top of the support base (7).

4. The thread breakage detection device based on an embroidery machine according to claim 1, characterized in that: Each of the multiple embroidery coil holders with fixing function includes a limiting roller (5), and the limiting roller (5) is rotatably embedded in the top of the base (1). The top of the limiting roller (5) is threadedly connected to a first screw (20), and the other end of the first screw (20) is fixedly connected to a pressure roller (6).

5. The thread breakage detection device based on an embroidery machine according to claim 1, characterized in that: Each of the multiple guide wheels includes a mounting sleeve (10), and the mounting sleeve (10) is slidably sleeved on the outer surface of the first spline shaft (12). The mounting sleeve (10) and the first spline shaft (12) are connected by a first bolt (9), and the first bolt (9) passes through the mounting sleeve (10) and is threadedly connected to the first spline shaft (12). A wire wheel (11) is fixedly sleeved on the outer surface of the mounting sleeve (10).

6. The thread breakage detection device based on an embroidery machine according to claim 1, characterized in that: Each of the adjustable supports includes a mounting base (18), and the mounting base (18) is fixedly mounted on the top of the base (1). A knob (17) is provided on one side of the mounting base (18). A second screw (19) is fixedly connected to one end of the knob (17). The second screw (19) passes through the mounting base (18) and is rotatably connected to the mounting base (18). A movable seat (13) is threaded onto the outer surface of the second screw (19). The movable seat (13) slides in contact with the mounting base (18). An encoder (8) is fixedly mounted on one side of the movable seat (13). A second spline shaft (16) is rotatably connected to the movable seat (13).

7. The thread breakage detection device based on an embroidery machine according to claim 1, characterized in that: Each of the multiple detection rollers includes a roller body (15), and the roller body (15) is slidably sleeved on the outer surface of the second spline shaft (16). The roller body (15) and the second spline shaft (16) are connected by a second bolt (14), and the second bolt (14) passes through the roller body (15) and is threadedly connected to the second spline shaft (16).

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