Sewing machine shuttle peg bottom line detection device

Abstract

The utility model provides a sewing machine shuttle peg bottom line detection device which is arranged below a large rotating shuttle of a sewing machine and comprises a fixed support connected with the sewing machine, an air cylinder, a detection head and a position sensor. The air cylinder is connected with the fixing support, and a piston of the air cylinder moves in a reciprocating mode in the normal direction of a cylindrical winding column of the shuttle peg. A piston of the air cylinder is connected with the detection head and drives the detection head to be close to or away from the shuttle peg. The position sensor is configured to sense a position of the detection head. The bottom line detection device for the shuttle peg of the sewing machine is high in applicability, can be applied to detection of sewing of any sewing machine with the shuttle peg, realizes detection of the allowance of the bottom line in the shuttle peg of the sewing machine, avoids defective products caused by insufficient allowance of the bottom line during sewing, and improves the line production rhythm and the product percent of pass.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine technical field, concretely relates to a sewing machine bobbin bottom thread detection device. BACKGROUND

[0002] The sewing machine still carries out sewing even if the bottom thread wound on the bobbin is insufficient during sewing, and whether the bottom thread on the bobbin is used up depends on the operator to check the product state after sewing. This detection method is prone to cause the high defective rate of sewing finished products and the defective product to flow out due to the proficiency of the operator.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the utility model, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0004] In view of the problems in the prior art, the purpose of the utility model is to provide a sewing machine bobbin bottom thread detection device, which can detect the remaining amount of the bottom thread in the bobbin of the sewing machine, avoid defective products caused by insufficient bottom thread during sewing, and improve the production line rhythm and the qualified rate of products.

[0005] The utility model provides a sewing machine bobbin bottom thread detection device is set in the lower of sewing machine big shuttle, the detection device includes with the fixed support of sewing machine connection, cylinder, detection head and position sensor,

[0006] The cylinder is connected with the fixed support, and the piston of the cylinder reciprocates along the normal direction of the cylindrical winding column of the bobbin;

[0007] The piston of the cylinder is connected with the detection head and drives the detection head to approach or move away from the bobbin;

[0008] The position sensor is configured to sense the position of the detection head.

[0009] According to some examples of the utility model, the position sensor is an analog positioning cylinder sensor.

[0010] According to some examples of the utility model, the cylinder is a double-shaft double-rod cylinder.

[0011] According to some examples of the utility model, the position sensor is arranged on the body of the cylinder.

[0012] According to some examples of the utility model, a first fixed block is further included, and the fixed support is connected with the sewing machine through the first fixed block.

[0013] According to some examples of the present application, the detection head is connected to the piston of the cylinder through a second fixing block.

[0014] According to some examples of the present application, the control module is electrically connected to the position sensor.

[0015] The control module is electrically connected to the position sensor.

[0016] And configured to receive the output signal of the position sensor when the detection head is in contact with the bobbin.

[0017] According to some examples of the present application, the control module is further configured to obtain the position of the detection head according to the output signal of the position sensor.

[0018] According to some examples of the present application, the control module is further configured to determine whether to give an alarm according to the obtained position of the detection head.

[0019] According to some examples of the present application, the control module is further configured to:

[0020] Receive the state of the sewing machine;

[0021] Control the movement of the piston of the cylinder according to the received state of the sewing machine.

[0022] The sewing machine bobbin thread detection device of the present application has strong applicability and can be used in the detection of any sewing machine with a bobbin, realizing the detection of the remaining amount of the thread in the bobbin of the sewing machine, avoiding the production of defective products due to insufficient thread remaining amount during sewing, and improving the production line rhythm and the product qualification rate. BRIEF DESCRIPTION OF DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings.

[0024] Figure 1 Figure 1 is a structural schematic diagram of a sewing machine bobbin thread detection device according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any numerous ways, and example implementations should not be construed as limited to having been set forth in the description. Rather, the present disclosure will be fully set forth and understood from the description, and the example implementations will serve the illustrative purposes. The examples described below are exemplary only, are intended to provide an explanation of the present disclosure and are not intended to limit the present disclosure in any way. Like reference numerals are used to indicate like elements in the drawings, and thus descriptions of the same elements will not be repeated.

[0026] In the description of the present disclosure, it should be understood that the terms "first", "second" are used only for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present disclosure, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] In the description of the present disclosure, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0028] The following disclosure provides many different embodiments or examples for implementing different structures of the present disclosure. In order to simplify the disclosure of the present disclosure, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present disclosure. In addition, the present disclosure can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present disclosure provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0029] The utility model provides a sewing machine bobbin bottom thread detection device for the existing technical problem, set up in the below of sewing machine big rotating shuttle, the detection device includes with the fixed support of sewing machine connection, pneumatic cylinder, detection head and position sensor, the pneumatic cylinder with fixed support connection, the piston of pneumatic cylinder reciprocatingly removes along the normal direction of cylindrical around column of bobbin, the piston of pneumatic cylinder is connected with detection head and drives detection head close to or away from bobbin, position sensor is configured as sensing the position of detection head. The utility model discloses sewing machine bobbin bottom thread detection device's applicability is strong, can be used to the detection in the sewing of any bobbin sewing machine, realizes the detection of the bobbin in sewing machine's bottom thread's surplus, avoids the defective product of the sewing of the bottom thread surplus shortage, improves the production line rhythm and the qualified rate of product.

[0030] The structure of the sewing machine bobbin bottom thread detection device of the utility model will be further described below in combination with the drawings and specific embodiments, and it can be understood that each specific embodiment does not limit the protection scope of the utility model.

[0031] Figure 1 The structure of the sewing machine bobbin bottom thread detection device of the utility model will be further described below in combination with the drawings and specific embodiments, and it can be understood that each specific embodiment does not limit the protection scope of the utility model.

[0032] Specifically, the sewing machine bobbin bottom thread detection device comprises a fixed support 1 connected with the sewing machine, a cylinder 2, a detection head 3 and a position sensor 4. The cylinder 2 can be connected with the fixed support 1 by bolt connection, and the fixed support 1 can be connected with the sewing machine through a first fixed block 11. It should be noted that after the cylinder 2 is fixed, the reciprocating movement direction of the piston 21 of the cylinder 2 is the normal direction of the cylindrical bobbin winding column. The piston 21 of the cylinder 2 is connected with the detection head 3 and drives the detection head 3 to move close to or away from the bobbin 8, and the detection head 3 can be in contact with the bottom thread (winding column) wound on the bobbin 8 during the process that the cylinder 2 moves close to the bobbin 8. Further, the first fixed block 11 can be fixed on the body of the sewing machine, and the fixed support 1 can be adjusted relative to the first fixed block 11, so as to ensure that the cylinder 2 moves close to the bobbin 8 and finally comes into contact with the bottom thread (winding column) wound on the bobbin 8. The position sensor 4 is configured to sense the position of the detection head 3.

[0033] Figure 1 In the embodiment, the cylinder 2 is a double-shaft double-rod cylinder, such as the CXSM6-20-Z73LS cylinder of SMC Company. The double-rod design of the double-shaft double-rod cylinder makes it have better symmetry during movement. The detection head 3 can be a columnar structure, which can be connected with the top of the piston 21 of the cylinder 2 through a second fixed block 31. Similarly, the connection between the second fixed block 31 and the top of the piston 21 of the cylinder 2 is adjustable, so as to ensure that the cylinder 2 moves close to the bobbin 8 and finally comes into contact with the bottom thread (winding column) wound on the bobbin 8. The detection head 3 can be a standard part, such as the EPHE-L2-40 detection head of MIMI, which itself includes a needle, a needle rod and a connecting seat, etc. Connecting the connecting seat with the top of the piston 21 of the cylinder 2 can be done. The two pistons 21 work simultaneously, which can effectively reduce the deflection of the cylinder 2 caused by uneven force during extension and contraction, and can more accurately transmit the linear motion of the piston to the detection head 3, thereby improving the stability and precision of the movement of the detection head 3.

[0034] The position sensor 4 is an analog position cylinder sensor, which is a sensor for accurately measuring the position of the cylinder and outputting an analog signal. Figure 1 In the embodiment, the position sensor 4 is arranged on the body of the cylinder 2. More specifically, the part of the analog position cylinder sensor provided with the sensor array is arranged on the body of the cylinder 2, and the magnetic ring is arranged on the piston of the cylinder. When the magnetic ring on the piston of the cylinder moves close to or away from, it will cause the change of the magnetic flux around the sensor array, thereby causing the change of the electromotive force of the sensor array. The microprocessor electrically connected with the analog position cylinder sensor can obtain the analog position signal after signal processing, that is, accurately determine the position of the piston. Since the detection head 3 is fixedly connected with the piston 21, the position of the detection head is accurately determined through the position sensor.

[0035] Generally, before starting the sewing, the operator needs to know the scale of the sewing task, roughly estimate the length of the bobbin thread required for each sewing project, and then according to the capacity of the bobbin of the sewing machine, roughly estimate or obtain the length of the bobbin thread wound on the bobbin of the sewing machine according to the experience value, and detect the position of the position sensor when the detection head 3 contacts the bobbin thread of the bobbin, which is the threshold position of the bobbin thread reserve. When the position of the detection head 3 contacting the bobbin thread of the bobbin is higher than the threshold position, it is considered that the bobbin thread is insufficient to complete the next sewing task, that is, the bobbin thread reserve is insufficient, and the operator needs to replace the bobbin; otherwise, it is considered that the bobbin thread reserve is sufficient, and the next sewing task can be performed.

[0036] The step of detecting the bobbin thread reserve of the above-mentioned sewing machine bobbin thread detection device can be completed manually by the operator. In some other embodiments, the sewing machine bobbin thread detection device can include a control module electrically connected to the position sensor, configured to receive the output signal of the position sensor when the detection head contacts the bobbin, and the control module is further configured to obtain the position of the detection head according to the output signal of the position sensor. At the same time, the control module is also configured to receive the state of the sewing machine; according to the received state of the sewing machine, control the movement of the piston of the cylinder. For example, the state of the sewing machine can include being in the state of sewing or starting the next sewing task. In the present application, when the control module receives the state of the sewing machine and judges that the sewing machine is about to start the next sewing task, it controls the piston of the cylinder to move (close) to the detection head until the detection head contacts the bobbin. At this time, the control module reads the output signal of the position sensor and obtains the position of the detection head according to the output signal. Further, the control module can also be configured to judge whether to give warning information according to the obtained position of the detection head. For example, when the control module includes a judgment module and a warning module, when the judgment module judges that the position of the detection head contacting the bobbin thread is higher than the threshold position, the control module sends a warning instruction to the warning module, and at this time the warning module can send warning information according to its set function to remind the user to replace the bobbin. The set function can be to send sound, flash the indicator light, or stop the alarm, etc., which is not limited here.

[0037] It should be noted that the technical scheme of the sewing machine bobbin bottom thread detection device of the utility model, wherein each functional module and module unit (such as a control unit) included in the technical scheme can correspond to a specific hardware circuit in an integrated circuit structure, therefore only the improvement of the specific hardware circuit is involved, the hardware part is not only a carrier for executing control software or a computer program, therefore the application of the corresponding control software or computer program is not involved in solving the corresponding technical problems and obtaining the corresponding technical effects, that is, the utility model only uses the improvement of the hardware circuit structure involved in these modules and units to solve the technical problems to be solved and obtain the corresponding technical effects, and the corresponding functions can be realized without the aid of specific control software or a computer program.

[0038] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

[0039] The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled in the art to which the utility model belongs, on the premise of not departing from the concept of the utility model, a number of simple deductions or replacements can be made, which should be regarded as belonging to the protection scope of the utility model.

Claims

1. A bobbin bottom thread detection device for a sewing machine, characterized by, The detection device is arranged below the large rotating hook of the sewing machine, and comprises a fixed support connected with the sewing machine, a cylinder, a detection head and a position sensor; The cylinder is connected with the fixed support, and a piston of the cylinder reciprocates along the normal direction of the cylindrical winding column of the bobbin; The piston of the cylinder is connected with the detection head and drives the detection head to move close to or away from the bobbin; The position sensor is configured to sense the position of the detection head.

2. The sewing machine bobbin thread detection device according to claim 1, characterized in that, The position sensor is an analog position cylinder sensor.

3. The sewing machine bobbin thread detection device according to claim 1, characterized in that, The cylinder is a double-shaft double-rod cylinder.

4. The sewing machine bobbin thread detection device according to claim 1, characterized in that, The position sensor is arranged on the body of the cylinder.

5. The sewing machine bobbin thread detection device according to claim 1, characterized in that, A first fixing block is further included, and the fixed support is connected with the sewing machine through the first fixing block.

6. The sewing machine bobbin thread detection device of claim 1, wherein, A second fixing block is further included, and the detection head is connected with the piston of the cylinder through the second fixing block.

7. The sewing machine bobbin thread detection device according to claim 1, wherein A control module is further included. The control module is electrically connected with the position sensor. And is configured to receive the output signal of the position sensor when the detection head collides with the bobbin.

8. The sewing machine bobbin winder of claim 7, wherein, The control module is further configured to obtain the position of the detection head according to the received output signal of the position sensor.

9. The sewing machine bobbin winder of claim 8, wherein, The control module is further configured to determine whether to give an alarm according to the obtained position of the detection head.

10. The sewing machine bobbin winder of claim 9, wherein, The control module is further configured to: receive the state of the sewing machine; control the movement of the piston of the cylinder according to the received state of the sewing machine.

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