Broken thread detection method of embroidery machine

Abstract

The invention discloses a broken line detection method of an embroidery machine, which comprises the following steps: step S01, when the embroidery machine performs embroidering, a bottom line core normally rotates, a broken line detection device detects the state of the bottom line core, the broken line detection device transmits a detected normal signal to a control circuit of the embroidery machine, the control circuit judges that the state of the bottom line core is normal, and if the state of the bottom line core is normal, the broken line detection device detects the state of the bottom line core; the control circuit controls normal embroidering of the embroidery machine; s02, when the thread is broken in the embroidering process of the embroidery machine, the thread core of the bottom thread stops rotating, at the moment, the thread breakage detection device transmits a detected abnormal signal to a control circuit of the embroidery machine, the control circuit judges that the state of the thread core of the bottom thread is abnormal, and the control circuit controls the embroidery machine to stop embroidering and controls an alarm of the embroidery machine to give an alarm. According to the broken thread detection method, whether the embroidery machine is broken or not is judged by detecting whether the bottom thread core rotates or not, the abnormal condition of virtual embroidery is prevented, and the quality of embroidery is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of embroidery machines and relates to a thread breakage detection method for embroidery machines. Background Art

[0002] The embroidery machine is used to embroider patterns on embroidery materials (embroidery cloth, leather, etc.). The embroidery machine is equipped with an upper thread and a lower thread. The upper thread is located on the embroidery machine head above the embroidery material, and the lower thread is wound in the lower thread core below the embroidery material. During the embroidery process, if the upper thread or the lower thread is broken, the upper thread and the lower thread cannot be combined into a seam, resulting in virtual embroidery, which affects the normal operation of the embroidery machine. Therefore, a thread break detection device is required to detect whether the thread is broken to ensure the normal operation of the embroidery machine and prevent virtual embroidery.

[0003] At present, embroidery machines are generally provided with a thread breakage detection device for detecting whether the upper thread is broken (the upper thread is broken or the lower thread is broken). For example, the Chinese utility model patent with application number 2010206055607 discloses a thread breakage detection device applied to a chain embroidery machine. This thread breakage detection device is provided with a rotating wheel, and the upper thread passes through the rotating wheel. Whether the thread is broken (the upper thread is broken or the lower thread is broken) is detected by whether the rotating wheel rotates. However, during the process of the embroidery machine sewing the embroidery material in one direction for a long distance, when the lower thread is broken but the upper thread is not broken, the embroidery material on the embroidery frame will drag the upper thread to continue to move, and the movement of the upper thread drives the rotating wheel to continue to rotate. The thread breakage detection device cannot detect the lower thread breakage in time. At this time, the lower thread and the upper thread cannot be combined into a seam, resulting in a long virtual embroidery, which affects the quality of the embroidery product.

[0004] Therefore, it is necessary to design a thread breakage detection method for an embroidery machine to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a thread breakage detection method for an embroidery machine to solve the above technical problems.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a thread break detection method for an embroidery machine, comprising the following steps:

[0007] Step S01: When the embroidery machine is embroidering, the bottom thread core rotates normally, and the state of the bottom thread core is set to a normal state. The thread breakage detection device detects the state of the bottom thread core, and the thread breakage detection device transmits the detected normal signal to the control circuit of the embroidery machine. The control circuit determines that the state of the bottom thread core is normal, and the control circuit controls the embroidery machine to embroider normally;

[0008] Step S02: When the thread breaks during embroidery, the bottom thread core stops rotating. At this time, the state of the bottom thread core is set to an abnormal state. At this time, the thread break detection device transmits the detected abnormal signal to the control circuit of the embroidery machine. The control circuit determines that the state of the bottom thread core is abnormal. The control circuit controls the embroidery machine to stop embroidering and controls the alarm of the embroidery machine to sound an alarm.

[0009] Furthermore, the broken thread detection device is a reflective photoelectric detection device, which includes a reflective sheet and a reflective photoelectric sensor. The reflective sheet is fixed to the side of the bottom thread core, and the reflective photoelectric sensor is installed on the body of the embroidery machine. The reflective photoelectric sensor is electrically connected to the control circuit.

[0010] Furthermore, the bottom thread core has a circular shape, and the number of the reflective sheets is eight, and the eight reflective sheets are evenly arranged along the circumferential direction of the bottom thread core.

[0011] Furthermore, the reflective sheet has a circular shape.

[0012] Furthermore, the reflective photoelectric sensor is provided with a light source transmitter and a light source receiver, the light source transmitter is used to transmit the light source, and the light source receiver is used to receive the light source reflected back by the reflective sheet.

[0013] Beneficial effects of the present invention: The thread breakage detection method of the embroidery machine of the present invention determines whether the thread breakage of the embroidery machine occurs by detecting whether the bottom thread core is rotating, thereby solving the technical problem that when the bottom thread is broken during the unidirectional long-distance sewing of the embroidery machine, the thread breakage detection device of the prior art cannot detect it in time and virtual embroidery occurs, thereby ensuring the normal embroidery of the embroidery machine and further ensuring the quality of the embroidery product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 4 is a flow chart of a thread breakage detection method for an embroidery machine according to an embodiment of the present invention.

[0015] Figure 2 It is a schematic structural diagram of the reflective photoelectric detection device during detection according to an embodiment of the present invention.

[0016] Figure 3 yes Figure 2 Schematic diagram of the structure of the bottom line core in the A direction.

[0017] Figure 4 It is a three-dimensional diagram of the bottom thread core.

[0018] Description of reference numerals:

[0019] Bottom line core 1, reflective photoelectric detection device 2;

[0020] Wire duct 11;

[0021] Reflective photoelectric sensor 21 and reflective sheet 22. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Reference Figure 2-4 The bottom thread core 1 of the embroidery machine has a circular shape, and a thread groove 11 is processed on the bottom thread core 1, and the bottom thread is wound in the thread groove 11. The bottom thread core 1 can be rotatably installed in a shuttle case (not shown in the drawings) of the embroidery machine, and the shuttle case is installed in a rotary shuttle below the embroidery frame of the embroidery machine.

[0024] Reference Figure 2 The broken wire detection device is designed as a reflective photoelectric detection device 2. The reflective photoelectric detection device 2 includes a reflective sheet 22 with a circular shape and a reflective photoelectric sensor 21. The reflective photoelectric sensor 21 is used to emit a light source and receive a light signal reflected by the reflective sheet 22. The reflective photoelectric sensor 21 is installed on the body of the embroidery machine. The reflective photoelectric sensor is electrically connected to the control circuit of the embroidery machine. The reflective photoelectric sensor 21 is provided with a light source transmitter and a light source receiver. The light source transmitter is used to emit a light source to the reflective sheet 22, and the light source receiver is used to receive the light source reflected by the reflective sheet 22. Figure 2 The dotted line in the middle is the optical transmission line. Figure 3 and Figure 4 , the reflective sheet 22 is fixed to the side of the bottom thread core 1. Preferably, the number of the reflective sheets 22 is eight, and the eight reflective sheets 22 are evenly arranged along the circumferential direction of the bottom thread core 1.

[0025] Reference Figure 1 The thread breakage detection method of the embroidery machine of this embodiment comprises the following steps:

[0026] Step S01: When the embroidery machine is embroidering, the bottom thread core 1 rotates normally. At this time, the state of the bottom thread core 1 is set to a normal state. The reflective photoelectric detection device 2 detects the bottom thread core 1. At this time, the reflective photoelectric sensor 21 of the reflective photoelectric detection device 2 receives a normal signal reflected back by the reflective sheet 22 on the bottom thread core 1. The reflective photoelectric sensor 21 transmits the received normal signal to the control circuit of the embroidery machine. The control circuit of the embroidery machine determines that the state of the bottom thread core 1 is normal, and the control circuit controls the embroidery machine to embroider normally.

[0027] Step S02: When the bottom thread breaks during embroidery, the bottom thread core 1 stops rotating. At this time, the state of the bottom thread core 1 is set to an abnormal state. At this time, the reflective photoelectric sensor 21 cannot receive the normal signal reflected by the reflective sheet 22 on the bottom thread core 1. The reflective photoelectric sensor 21 transmits the abnormal signal to the control circuit of the embroidery machine. The control circuit controls the embroidery machine to stop embroidering and controls the alarm of the embroidery machine to sound an alarm to remind the operator.

[0028] The thread breakage detection method of the embroidery machine of the present invention determines whether the thread of the embroidery machine is broken by detecting whether the bottom thread core is rotating, thereby solving the technical problem that the thread breakage detection device of the prior art cannot detect the thread breakage in time when the bottom thread is broken during the unidirectional long-distance sewing of the embroidery machine, resulting in virtual embroidery, so as to ensure the normal embroidery of the embroidery machine and further ensure the quality of the embroidery. In addition, when the bottom thread in the bottom thread core is used up or stuck, the bottom thread core stops rotating, which can also be detected by the thread breakage detection method of the present invention, and the embroidery machine is controlled to stop embroidering and the alarm is controlled to alarm.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting thread breakage in an embroidery machine, characterized in that: The steps include: Step S01: When the embroidery machine is embroidering, the bottom thread core rotates normally, and the state of the bottom thread core is set to a normal state. The thread breakage detection device detects the state of the bottom thread core, and the thread breakage detection device transmits the detected normal signal to the control circuit of the embroidery machine. The control circuit determines that the state of the bottom thread core is normal, and the control circuit controls the embroidery machine to embroider normally; Step S02: When the thread breaks during embroidery, the bottom thread core stops rotating. At this time, the state of the bottom thread core is set to an abnormal state. At this time, the thread break detection device transmits the detected abnormal signal to the control circuit of the embroidery machine. The control circuit determines that the state of the bottom thread core is abnormal. The control circuit controls the embroidery machine to stop embroidering and controls the alarm of the embroidery machine to sound an alarm.

2. The disconnection detection method according to claim 1, characterized in that: The thread break detection device is a reflective photoelectric detection device, which includes a reflective sheet and a reflective photoelectric sensor. The reflective sheet is fixed to the side of the bottom thread core, and the reflective photoelectric sensor is installed on the body of the embroidery machine. The reflective photoelectric sensor is electrically connected to the control circuit.

3. The disconnection detection method according to claim 2, characterized in that: The bottom thread core has a circular shape, and the number of the reflective sheets is eight, and the eight reflective sheets are evenly arranged along the circumferential direction of the bottom thread core.

4. The disconnection detection method according to claim 2 or 3, characterized in that: The reflective sheet has a circular shape.

5. The disconnection detection method according to claim 2, characterized in that: The reflective photoelectric sensor is provided with a light source transmitter and a light source receiver. The light source transmitter is used to transmit light source, and the light source receiver is used to receive the light source reflected back by the reflective sheet.

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