CN107805888B - T-shirt hem sewing method and sewing equipment - Google Patents
T-shirt hem sewing method and sewing equipment Download PDFInfo
- Publication number
- CN107805888B CN107805888B CN201710866873.4A CN201710866873A CN107805888B CN 107805888 B CN107805888 B CN 107805888B CN 201710866873 A CN201710866873 A CN 201710866873A CN 107805888 B CN107805888 B CN 107805888B
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- bone
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/10—Work-feeding means with rotary circular feed members
- D05B27/18—Feed cups
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B35/00—Work-feeding or -handling elements not otherwise provided for
Abstract
The invention discloses a T-shirt lower hem sewing method, which comprises the following steps: s1: arranging the T-shirt lower hem on a conveying mechanism of the sewing mechanism to enable the T-shirt lower hem to rotate along the conveying mechanism; s2: detecting the position of a bone of a T-shirt hem for the first time through a bone position sensor, and setting the position of the bone as a first bone position; s3: the T-shirt lower hem rotates for a set first distance to the bone inverting device, the conveying mechanism inverts, and the bone inverting device shifts the bone inverting position and keeps the bone position state after shifting; s4: the T-shirt lower hem rotates along the conveying mechanism, and the bone position sensor detects the first bone position of the T-shirt lower hem again; s5: after the T-shirt lower hem rotates for the set second distance, the first rib position moves to the sewing needle of the sewing mechanism to start sewing until the T-shirt lower hem is finished for one circle. By using the method of the invention, the accurate positioning, straightening and sewing processing can be realized at the lower hem position of the clothes, and the defects in the prior art are overcome.
Description
Technical Field
The invention belongs to the field of automatic mechanical equipment, and particularly relates to a T-shirt hem sewing method in the field of sewing machines and sewing equipment suitable for the sewing method.
Background
With the more and more intensive modernization technology in various industries, automation equipment is more and more widely applied to the process operation process of replacing manual work or semi-manual work. In the field of clothing and apparel processing, as the degree of automation is increasingly deepened, many sewing machine devices used in the traditional processing process are gradually replaced by various special sewing machines of different types, the special sewing machines are called special machines for short in the field of clothing processing, and the special sewing machines gradually replace the traditional operation method and are widely applied to the processing process of middle-high-end clothing and apparel, such as processes of collar rolling, edge folding, flat seaming, splicing seams, decoration edges and the like.
The processing of the lower hem of the clothes always has the processing difficulty in the traditional sewing process, namely the sewing processing of the lower hem bones of the clothes. The position of the rib of the clothes refers to the position of the left and right edge joints formed by splicing the front and the back of the clothes, and the processing of the position of the rib of the clothes determines the final processing quality of the ready-made clothes to a certain extent. The traditional bone position processing method is that after the center joint is spliced, the bone seam is aligned manually and then the final sewing is carried out, or a special machine in the prior art, such as the existing flat seaming machine and the like, is directly used for aligning the bone seam and carrying out the sewing of the bone position. The clothes sewn by the prior art have the advantages that the bone positions on the two sides are oppositely arranged, once the processing requirements are put forward, the bone positions on the two sides are oppositely arranged, the clothes are manually or additionally arranged and aligned, then the clothes are sewn, due to certain errors of manpower and equipment, the processing of the bone positions is difficult to realize accurately, and the sewing machine equipment in the prior art cannot realize full-automatic accurate and accurate aligned sewing processing of the bone positions.
In order to solve the deviation that the artifical bone that dials brought, some producers have designed the device of the automatic bone position of dialling, utilize bone position sensor and automatic bone device of dialling to cooperate promptly, will put down after detecting the clothes lower hem bone position and send to the automatic bone device department of dialling, dial bone position, then reply the motion and send the clothes lower hem to sewing mechanism department and make up. Although the method replaces manual work with automatic equipment, so that the deviation caused by manual operation is reduced, the step of correcting the bone position mainly utilizes the friction force between the bone-correcting device and the bone position, and the lower hem position generates certain deviation which is difficult to avoid in the process of correcting the bone position, so that the position of the lower hem bone position generates certain deviation in the process of restoring movement, the bone position cannot be accurately sewn, and the suture line at the bone position is inclined.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a T-shirt lower hem sewing method and sewing equipment suitable for the method. The invention also provides sewing equipment suitable for the sewing method, the equipment is simple in structure and convenient to operate, and is suitable for batch production, so that the quality of the sewn part of the T-shirt hem has excellent consistency.
The technical effect to be achieved by the invention is realized by the following scheme:
the T-shirt lower hem sewing method provided by the invention comprises the following steps:
s1: placing the T-shirt hem on a conveying mechanism of a sewing mechanism, starting a transmission mechanism, and rotating the T-shirt hem along the conveying mechanism;
s2: detecting the position of a bone of a T-shirt hem for the first time through a bone position sensor, and setting the position of the bone as a first bone position;
s3: the T-shirt lower hem rotates for a set first distance to the bone inverting device, the conveying mechanism inverts, and the bone inverting device shifts the bone inverting position and keeps the bone position state after shifting;
s4: the T-shirt lower hem rotates along the conveying mechanism, and the first bone position of the T-shirt lower hem is detected again by the bone position sensor;
s5: after the T-shirt lower hem rotates for the set second distance, the first rib position moves to the sewing needle of the sewing mechanism to start sewing until the T-shirt lower hem is finished for one circle.
The invention also provides sewing equipment suitable for the T-shirt hem sewing method, which specifically comprises the following steps:
the sewing mechanism comprises a sewing machine needle and a machine table;
a conveying mechanism arranged below the sewing machine needle;
the bone position sensor is arranged above the feeding mechanism;
the bone pouring device is arranged below the feeding mechanism;
the control computer is also used for controlling the movement of the sewing mechanism, the conveying mechanism and the bone position sensor;
and the feeding mechanism is also provided with a support guide device for supporting the lower hem of the T-shirt and keeping the position of the bones.
Furthermore, the conveying mechanism comprises a first cloth feeding wheel, a second cloth feeding wheel and a cloth feeding wheel driving mechanism which are oppositely arranged, and the two cloth feeding wheels are driven by the driving mechanism to rotate along the axial direction; the sewing machine needle is arranged at the upper end of the middle part of the two cloth feeding wheels.
Furthermore, the bone reversing device comprises a bone plate and a rotating shaft connected with the bone plate, the rotating shaft is fixedly connected to the machine table, and the bone plate is of a flat plate structure with one side edge tilted.
Further, the bone striking plate is initially positioned with the plate surface thereof in contact with the second cloth feeding wheel.
Furthermore, the supporting and guiding device is arranged between the first cloth feeding wheel and the second cloth feeding wheel, and the supporting and guiding device is a fixed supporting plate device forming an inclination angle with the wheel axle surfaces of the two cloth feeding wheels.
Furthermore, the bone position sensor is a laser displacement sensor.
Furthermore, the bone position sensor comprises a first bone position sensor and a second bone position sensor which are respectively arranged on two sides of the sewing machine needle.
Furthermore, the bone position sensor comprises a first bone position sensor and a second bone position sensor which are respectively arranged on two sides of the sewing machine needle.
The sewing method using the sewing equipment provided with the 2 bone position sensors comprises the following steps:
s1: placing the T-shirt hem on a conveying mechanism of a sewing mechanism, starting a transmission mechanism, and rotating the T-shirt hem along the conveying mechanism;
s2: detecting the bone position of the T-shirt hem for the first time through a first bone position sensor, and setting the bone position as a first bone position;
s3: the T-shirt lower hem rotates for a set first distance to the bone inverting device, the conveying mechanism inverts, and the bone inverting device shifts the bone inverting position and keeps the bone position state after shifting;
s4: the T-shirt lower hem rotationally moves to a second bone position sensor along the conveying mechanism, and the second bone position sensor detects a first bone position of the T-shirt lower hem;
s5: after the T-shirt lower hem rotates for the set second distance, the first rib position moves to the sewing needle of the sewing mechanism to start sewing until the T-shirt lower hem is finished for one circle.
The invention has the following advantages: the T-shirt lower hem sewing method provided by the invention can realize accurate positioning, correcting and sewing processing on the lower hem bones of clothes, and overcomes the defects in the prior art. The invention also provides sewing equipment suitable for the sewing method, which is simple in structure, simple and convenient to operate, suitable for batch production and capable of enabling the quality of the lower hem of the T-shirt to be excellent in consistency.
Drawings
FIG. 1 is a schematic view of the position of a lower hem bone of a garment;
FIG. 2 is a schematic view illustrating a method for sewing a T-shirt hem in accordance with the present invention;
FIG. 3 is a schematic front structure view of a T-shirt hem sewing apparatus of the present invention;
FIG. 4 is a schematic top view of a sewing machine for a T-shirt hem in accordance with the present invention;
FIG. 5 is an enlarged schematic view of FIG. 4 at the dashed line;
FIG. 6 is another schematic structural view of a T-shirt hem sewing apparatus of the present invention;
FIG. 7 is an enlarged schematic view of FIG. 6 at the dashed line;
FIG. 8 is a schematic view of the operation of a T-shirt lower hem sewing machine provided with 2 rib position sensors in the present invention;
FIG. 9 is a schematic view of the operation of a T-shirt lower hem sewing machine provided with 1 position sensor according to the present invention;
FIG. 10 is a schematic view of the operation of the T-shirt hem sewing apparatus of FIG. 9.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in the attached figure 1, the position of the lower hem bone of the clothes is schematically shown, a sewn structure formed by splicing seams between front and rear fabrics indicated by an arrow is the bone position, a bone position processing area is arranged in a dotted line, and the clothes in the figure 1 is a structure after the bone position is sewn.
As shown in fig. 2, which is a schematic illustration of the method for sewing a lower hem of a T-shirt in this embodiment, the main structure of the sewing mechanism mainly includes two cloth feeding wheels 201 and 202, a sewing machine needle 204, a seam position sensor 203, and a seam reversing device 207 of the sewing mechanism, wherein a seam starting point is indicated at a reference numeral 205 and a lower hem seam position of the garment is indicated at a reference numeral 206, which are opposite to the sewing machine needle in the figure. The sewing method comprises the following steps:
s1: placing the T-shirt hem on a conveying mechanism of a sewing mechanism, namely, tightly hooping on cloth feeding wheels 201 and 202 in fig. 2, starting a transmission mechanism of the cloth feeding wheels, and enabling the T-shirt hem to rotate along the conveying mechanism, wherein the initial movement direction is set to be anticlockwise;
s2: the bone position of the T-shirt hem is detected for the first time through the bone position sensor 203 and is set as a first bone position;
s3: the T-shirt lower hem continuously rotates anticlockwise until the T-shirt lower hem moves to a set first distance (distance B + C in the attached drawing 2) and then moves to the bone turnover device 207, the conveying mechanism rotates reversely, the T-shirt lower hem moves clockwise, and the bone turnover device 207 dials the bone turnover position and keeps the bone position state after dialing;
s4: the T-shirt hem continues to rotate clockwise along the conveying mechanism until the bone position sensor 203 detects the first bone position of the T-shirt hem again;
s5: after the T-shirt hem rotates for a set second distance (distance C in the attached drawing 2), the first rib position moves to a sewing needle position 205 of the sewing mechanism to start sewing until the T-shirt hem is finished for one circle.
The sewing method of the T-shirt hem in the prior art comprises the following steps: the clothes lower hem bone position 206 moves anticlockwise to the bone position sensor 203, and after the bone position is detected, the clothes lower hem bone position moves to the bone inverting device 207, namely, the clothes lower hem bone position moves anticlockwise for a distance A; then the transmission mechanism rotates reversely, the bone position is corrected at the bone reversing device 207, and then the bone position is sewn to a seam starting point 205 at the sewing machine needle 204 according to the set distance B. In the prior art, at the bone inverting device, due to the action of friction force, certain position deviation can occur in the T-shirt lower hem in the rotating motion process, or the bone position can deviate in the rotating motion process, so that certain deviation can be generated in the processing process, and the bone position is enabled to be sewed obliquely. By adopting the sewing method provided by the embodiment, the bone position is positioned twice, the movement distance is accurately set, and the sewing deflection is avoided.
The structure of the T-shirt hem sewing device provided in the embodiment is shown in the attached figures 3-7, and mainly comprises a sewing machine needle 1011 and a machine table 1013 in a sewing mechanism, a conveying mechanism arranged below the sewing machine needle, a bone position sensor arranged above the conveying mechanism, a bone reversing device arranged below the conveying mechanism, and a control computer for controlling the movement of the sewing mechanism, the conveying mechanism and the bone position sensor. The control computer and the control system of the control computer adopted in the embodiment can use the sewing machine control system in the prior art to realize unified movement control of all parts, and can realize the setting of the fixed movement path and the movement direction required by the invention.
The specific structure is as shown in the attached drawing, and the conveying mechanism is a mechanism for fixing the T-shirt lower hem. In this embodiment, the transferring mechanism includes a first cloth feeding wheel 102, a second cloth feeding wheel 103 and two cloth feeding wheel driving mechanisms (not labeled) which are oppositely arranged, a plane formed by axes of the two cloth feeding wheels is parallel to a horizontal plane of the machine, the two cloth feeding wheels can rotate along an axial direction under the driving of the driving mechanisms, and the sewing machine head 101, the needle 1011 and the sewing starting point 1012 are all arranged at the upper end of the middle part of the two cloth feeding wheels. During the feeding process before the sewing process is started, the T-shirt lower hem is sleeved between the two cloth feeding wheels, the two cloth feeding wheels are utilized to tighten and fix the clothes lower hem, the surfaces of the two cloth feeding wheels are preferably made of soft high polymer materials such as high polymer foaming materials, rubber materials, silica gel materials and the like, the friction force is certain, the clothes lower hem can be fixed, and the clothes lower hem rotates along with the rotation of the cloth feeding wheels.
The bone-inverting device in the embodiment comprises a bone-shifting plate 106 and a rotating shaft 107 connected with the bone-shifting plate, wherein the rotating shaft is fixedly connected to a machine table, and the bone-shifting plate is of a flat plate structure with one side edge tilted. The initial position of the bone plate 106 is that the plate surface of the bone plate is contacted with the second cloth feeding wheel 103, as shown in the attached drawing, when the original material loading position is realized, the T-shirt lower hem is fixed on the two cloth feeding wheels, the bone plate is connected with the inner side of the T-shirt, and the process of bone position setting is as follows: if the clothes lower hem initial rotation direction is anticlockwise, the bone position clings to the second cloth feeding wheel and the bone plate during anticlockwise rotation, the change cannot occur, once the cloth feeding wheel rotates clockwise to drive the clothes lower hem to rotate clockwise, the bone position moves to the tilting edge on the bone plate, and due to the fact that the bone position is opposite to the original movement direction, the bone position is pulled back to the other side opposite to one side of the original direction. After the bone position is corrected, the bone plate rotating shaft rotates and simultaneously drives the bone plate body to rotate, so that the corrected bone position is prevented from being influenced, and the subsequent processing steps are influenced.
After setting the bone position, in order to avoid the change of the bone position after setting, a support guide device is further disposed between the first cloth feeding wheel and the second cloth feeding wheel, as shown in fig. 5, the support guide device is a fixed support plate device 105 forming an inclination angle with the wheel axle surfaces of the two cloth feeding wheels. Because of having certain inclination, the lower hem cloth can hug closely in the surface of fixed bolster in the rotation process to tightly fix the position of bone, can not take place to reverse or twist after setting up the position of bone, above-mentioned inclination preferred 5-10 can.
The bone position sensor used in the invention is preferably a laser displacement sensor, the laser displacement sensor is a sensor for measuring by using a laser technology, and the bone position sensor consists of a laser, a laser detector and a measuring circuit, and can accurately measure the changes of the position, the displacement and the like of a measured object in a non-contact manner. In the invention, the laser displacement sensor is used for detecting the thickness of the clothes, and the laser displacement sensor can be used for sensitively and accurately identifying the position of the bone position because the bone position of the clothes is protruded and the difference between the thickness and other parts is large.
The arrangement of the bone position sensor in the invention comprises two different schemes:
(1) the bone position sensor comprises a first bone position sensor and a second bone position sensor which are respectively arranged on two sides of the sewing machine needle.
(2) The number of the bone position sensors is 1, and the bone position sensors are arranged above the second cloth conveying wheel.
Fig. 3-7 in this embodiment show the use of a second bone position sensor, i.e. 1 bone position sensor, which sensor 104 is arranged laterally above the second feed wheel.
The first scheme of the bone position sensor arrangement in this embodiment is shown in fig. 8, and a bone-inverting device 307 and a second bone position detecting mechanism 304 are additionally arranged on the basis of the prior art, and the using process thereof includes the following steps:
s1: placing the T-shirt lower hem on a conveying mechanism of a sewing mechanism, namely, tightening cloth feeding wheels 301 and 302 in the drawing, starting a transmission mechanism, and enabling the T-shirt lower hem to rotate along the conveying mechanism, wherein the initial movement direction is set to be anticlockwise;
s2: the bone position of the T-shirt hem is detected for the first time through the first bone position sensor 304 and is set as a first bone position;
s3: the T-shirt lower hem rotates for a set first distance to the bone inverting device 307, the first distance is the distance from the first bone position sensor 304 to the bone inverting device 307, and the movement direction is clockwise; then the transmission mechanism rotates anticlockwise in a reverse direction, and the bone turnover mechanism 307 stirs the bone turnover position and keeps the bone position state after the bone turnover;
s4: the T-shirt lower hem rotates along the conveying mechanism to move to a second bone position sensor 303, and the second bone position sensor detects a first bone position of the T-shirt lower hem;
s5: after the T-shirt lower hem rotates for the set second distance, the second distance is the distance from the second bone position sensor 303 to the starting point 306 corresponding to the sewing machine needle 305, and the first bone position moves to the sewing needle position 306 of the sewing mechanism to start sewing until the T-shirt lower hem is finished for one circle.
The first scheme of the bone position sensor arrangement of the invention is shown in fig. 9, a bone inverting device 406 is additionally arranged on the basis of the prior art, and a bone position sensor 403 is arranged above the second cloth feeding wheel 402, the use process of the bone position sensor arrangement is shown in fig. 10, wherein the black spot is the bone position, and the bone position sensor arrangement comprises the following steps:
s1: placing the T-shirt hem on a conveying mechanism of a sewing mechanism, namely, tightening the cloth feeding wheels 401 and 402 in the figure 9, starting a transmission mechanism of the cloth feeding wheels, and enabling the T-shirt hem to rotate along the conveying mechanism, wherein the initial movement direction is set to be anticlockwise, and the direction is shown by an arrow in the figure A;
s2: the bone position of the T-shirt hem is detected for the first time through the bone position sensor 403, and is set as a first bone position;
s3: the T-shirt lower hem moves for a first distance to the bone inverting device 406, the first distance is the distance from the first bone position sensor 403 to the bone inverting device 406, and the moving direction is clockwise, as shown in a figure B; then the conveying mechanism rotates anticlockwise in a reverse rotation mode, and the bone reversing mechanism 406 dials the bone turnover position and keeps the bone position after dialing and turnover;
s4: the T-shirt hem continues to rotate counterclockwise along the transport mechanism until the bone position sensor 403 again detects the first bone position of the T-shirt hem, as shown in figure C;
s5: after the T-shirt lower hem rotates for the set second distance, the second distance is the distance from the first bone position sensor 403 to the starting point 405 corresponding to the sewing machine needle 404, the first bone position moves to the sewing needle 405 of the sewing mechanism to start sewing until the T-shirt lower hem is finished for one circle, and the diagram D shows that the T-shirt lower hem is formed.
By using the device and the method, the direction of the bone position can be adjusted, and the problem of oblique sewing at the bone position in the prior art can be effectively avoided.
The embodiment shows that the T-shirt lower hem sewing method and the sewing device can realize accurate positioning, correcting and sewing processing on the seam position of the lower hem of the clothes, overcome the defects in the prior art, and the using method of the sewing device is simple and easy to implement.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention and not for limiting the same, and although the embodiments of the present invention are described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the embodiments of the present invention, and these modifications or equivalent substitutions cannot make the modified technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A T-shirt lower hem sewing method is characterized by comprising the following steps:
s1: placing the T-shirt hem on a conveying mechanism of a sewing mechanism, starting a transmission mechanism, and rotating the T-shirt hem along the conveying mechanism;
s2: detecting the position of a bone of a T-shirt hem for the first time through a bone position sensor, and setting the position of the bone as a first bone position;
s3: the T-shirt lower hem rotates for a set first distance to the bone inverting device, the conveying mechanism inverts, and the bone inverting device shifts the bone inverting position and keeps the bone position state after shifting;
s4: the T-shirt lower hem rotates along the conveying mechanism, and the first bone position of the T-shirt lower hem is detected again by the bone position sensor;
s5: after the T-shirt lower hem rotates for the set second distance, the first rib position moves to the sewing needle of the sewing mechanism to start sewing until the T-shirt lower hem is finished for one circle.
2. A T-shirt hem sewing machine, comprising:
the sewing mechanism comprises a sewing machine needle and a machine table;
a conveying mechanism arranged below the sewing machine needle;
the bone position sensor is arranged above the feeding mechanism;
the bone inverting device is arranged below the feeding mechanism and comprises a bone-shifting plate and a rotating shaft connected with the bone-shifting plate, the rotating shaft is fixedly connected with the machine table, and the bone-shifting plate is of a flat plate structure with one side edge tilted;
the control computer is also used for controlling the movement of the sewing mechanism, the conveying mechanism and the bone position sensor;
the feeding mechanism is also provided with a support guide device for supporting the lower hem of the T-shirt and keeping the position of the bone;
the bone position sensors comprise a first bone position sensor and a second bone position sensor which are respectively arranged at two sides of the sewing machine needle;
the sewing method of the T-shirt lower hem sewing equipment comprises the following steps:
s1: placing the T-shirt hem on a conveying mechanism of a sewing mechanism, starting a transmission mechanism, and rotating the T-shirt hem along the conveying mechanism;
s2: detecting the position of a bone of a T-shirt hem for the first time through a first bone position sensor, and setting the position of the bone as a first bone position;
s3: the T-shirt lower hem rotates for a set first distance to the bone turnover device, the conveying mechanism rotates reversely, and the bone turnover device stirs the bone turnover position and keeps the bone turnover position;
s4: the T-shirt lower hem rotates along the conveying mechanism to move to the second bone position sensor, and the second bone position sensor detects the first bone position of the T-shirt lower hem;
s5: after the T-shirt lower hem rotates for the set second distance, the first rib position moves to the sewing needle of the sewing mechanism to start sewing until the T-shirt lower hem is finished for one circle.
3. The T-shirt hem sewing apparatus of claim 2, wherein: the conveying mechanism comprises a first cloth feeding wheel, a second cloth feeding wheel and a cloth feeding wheel driving mechanism which are oppositely arranged, and the two cloth feeding wheels are driven by the driving mechanism to rotate along the axial direction; the sewing machine needle is arranged at the upper end of the middle part of the two cloth feeding wheels.
4. The T-shirt hem sewing apparatus of claim 3, wherein: the initial position of the bone striking plate is that the plate surface of the bone striking plate is contacted with the second cloth feeding wheel.
5. The T-shirt hem sewing machine of claim 3, wherein: the supporting and guiding device is arranged between the first cloth feeding wheel and the second cloth feeding wheel, and the supporting and guiding device is a fixed supporting plate device forming an inclination angle with the wheel surfaces of the two cloth feeding wheels.
6. The T-shirt hem sewing apparatus of claim 2, wherein: the bone position sensor is a laser displacement sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710866873.4A CN107805888B (en) | 2017-09-22 | 2017-09-22 | T-shirt hem sewing method and sewing equipment |
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| CN201710866873.4A CN107805888B (en) | 2017-09-22 | 2017-09-22 | T-shirt hem sewing method and sewing equipment |
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| CN107805888A CN107805888A (en) | 2018-03-16 |
| CN107805888B true CN107805888B (en) | 2023-03-14 |
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| CN112011905B (en) * | 2020-06-30 | 2021-09-21 | 嘉兴恒美服饰有限公司 | Sewing equipment free of turning over |
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| DE102007032658A1 (en) * | 2006-09-21 | 2008-04-03 | Dürkopp Adler AG | Sewing machine and insertion station for such a sewing machine |
| JP2009100988A (en) * | 2007-10-24 | 2009-05-14 | Juki Corp | Piping sewing machine |
| CN202626591U (en) * | 2012-04-23 | 2012-12-26 | 王小斌 | Device with automatic thread trimming function |
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| CN107805888A (en) | 2018-03-16 |
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