CN107805889B - Lower tug synchronous feeding structure - Google Patents
Lower tug synchronous feeding structure Download PDFInfo
- Publication number
- CN107805889B CN107805889B CN201711119879.1A CN201711119879A CN107805889B CN 107805889 B CN107805889 B CN 107805889B CN 201711119879 A CN201711119879 A CN 201711119879A CN 107805889 B CN107805889 B CN 107805889B
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- tug
- feeding structure
- shaft
- lower tug
- synchronous feeding
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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
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Unwinding Of Filamentary Materials (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
本发明提供了一种下拖轮同步送料结构，属于缝纫机技术领域。它解决了现有的缝纫机仅采用上后拖轮送料在输送多层缝料时经常发生上、下层缝料错位的问题。本下拖轮同步送料结构，包括穿设于缝纫机工作台内的与上拖轮平行的转轴和同轴套设在转轴上的下拖轮，下拖轮位于上拖轮的正下方处且与上拖轮相对设置，转轴上固定有摆杆，摆杆与缝纫机的主轴之间设有当主轴转动时用于带动摆杆摆动的传动组件，转轴与下拖轮之间设有当摆杆摆动时用于限制下拖轮始终单向转动的单向组件。本发明具有结构设计合理，适用范围广，在缝制多层缝料时缝料不错位、不起皱等优点。
The invention provides a synchronous feeding structure of a lower tug, belonging to the technical field of sewing machines. The utility model solves the problem that the upper and lower layers of sewing materials are often misaligned when conveying the multi-layer sewing materials by only using the upper and rear tugs to feed the existing sewing machines. The synchronous feeding structure of the lower tug includes a rotating shaft parallel to the upper tug and a lower tug coaxially sleeved on the rotating shaft. The lower tug is located directly below the upper tug and is opposite to the upper tug. A pendulum rod is fixed on the rotating shaft. Between the pendulum rod and the main shaft of the sewing machine, there is a transmission component that drives the pendulum rod to swing when the main shaft rotates. Between the rotating shaft and the lower tug wheel, when the pendulum rod swings, there is a transmission component that restricts the lower tug wheel from always moving. One-way assembly with one-way rotation. The invention has the advantages of reasonable structure design, wide application range, and good position and wrinkle-free when sewing multi-layer sewing materials.
Description
Technical Field
The invention belongs to the technical field of sewing machines, and relates to a synchronous feeding structure, in particular to a lower tug synchronous feeding structure which is cooperated with an upper tug.
Background
The traditional sewing machine has the feeding mode of feeding cloth by a feed dog, and part of the traditional sewing machine is that a needle and a presser foot participate in feeding together with the feed dog. Therefore, the Chinese patent discloses a rear tug device [ application publication No. CN106676764A ], which comprises a cloth feeding shaft, wherein the cloth feeding shaft is connected with an upper crank through more than one connecting rod through a lower crank, the upper crank is fixed on the cloth feeding shaft, the cloth feeding shaft is also provided with a fixing frame and an adjusting crank, the adjusting crank is fixedly connected with the cloth feeding shaft, the fixing frame and the cloth feeding shaft can move relatively, the adjusting crank is provided with a strip-shaped hole, one end of a pulling wheel frame is hinged on the strip-shaped hole, the other end of the pulling wheel frame is hinged with a long arm of the pulling wheel crank, the pulling wheel crank is hinged with the fixing frame, the pulling wheel crank is provided with a rear tug, and the position of the adjusting pulling wheel frame on the strip-shaped hole of the adjusting crank is adjusted to change the action length of the adjusting crank so.
Although the cloth feeding through the rear tugger has the advantages of simplicity and convenience in operation, reliability and the like, in the sewing operation process, the cloth is pulled only by the upper tugger, so that the phenomena of dislocation of upper and lower layers of sewing materials, rising of the sewing materials and the like frequently occur when a plurality of layers of sewing materials are sewn, and the product quality is influenced.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a lower tug synchronous feeding structure which can synchronously pull cloth with an upper tug to ensure that sewing materials are not misplaced and wrinkled when a plurality of layers of sewing materials are sewn.
The purpose of the invention can be realized by the following technical scheme:
this synchronous pay-off structure of tow boat down, including wear to locate in the sewing machine workstation with the parallel pivot of last tow boat and coaxial cover establish the lower tow boat in the pivot, lower tow boat be located the tow boat under and locate and set up with last tow boat relatively, its characterized in that, the pivot on be fixed with the pendulum rod, the main shaft of pendulum rod and sewing machine between be equipped with and be used for driving pendulum rod wobbling transmission assembly when the main shaft rotates, pivot and tow boat down between be equipped with and be used for restricting tow boat unidirectional rotation's one-way subassembly all the time when the pendulum rod swings.
The lower tug is horizontally arranged, the highest position of the lower tug is not lower than the upper surface of the workbench, and the lower tug rotates in a single direction under the action of the transmission assembly when feeding is needed.
In foretell synchronous pay-off structure of tow boat down, drive assembly including coaxial fixing at the adapter sleeve of main shaft tip, eccentric fixing at the adapter sleeve tip with the articulated shaft one of main shaft parallel, fix on the pendulum rod with the articulated shaft two of articulated shaft one parallel and with the articulated shaft one perpendicular connecting rod that sets up, a pot head of connecting rod is established on articulated shaft one, another pot head of connecting rod is established on articulated shaft two.
When the main shaft rotates, the connecting sleeve is driven to rotate, the first articulated shaft is driven to do circular motion around the central axis of the connecting sleeve, and the swing rod is pulled to swing within a certain angle range through the connecting rod.
In the synchronous feeding structure of the lower tug, a through chute extending in the radial direction is formed in the end portion of the connecting sleeve, a sliding block is arranged in the chute in a matched mode, the first hinge shaft is fixed on the sliding block, and an adjusting limiting unit used for adjusting the sliding block to a proper position and then fixing the sliding block at the current position is arranged between the sliding block and the connecting sleeve.
In foretell synchronous pay-off structure of tow boat down, the one end of spout has spacing portion, foretell regulation spacing unit include with slider threaded connection's adjusting screw, adjusting screw extend along the length direction of spout, adjusting screw on be equipped with the ring channel, spacing portion card go into in the ring channel.
When the adjusting screw is rotated, the adjusting screw can only rotate in the circumferential direction under the limitation of the annular groove and the limiting part, and the circumferential motion of the adjusting screw is converted into the linear motion of the sliding block due to the threaded connection of the adjusting screw and the sliding block, so that the position of the sliding block in the sliding groove is changed, namely the eccentric position of the first hinge shaft (the vertical distance between the first hinge shaft and the central axis of the connecting sleeve) is changed, and the purpose of adjusting the swing angle of the swing rod is achieved. When the swing angle of the swing rod is larger, the rotating speed of the rotating shaft is larger, and the feeding speed of the lower tug is higher.
In the synchronous feeding structure of the lower tug, the adjusting and limiting unit comprises a threaded hole arranged in the connecting sleeve and a bolt in threaded connection with the threaded hole, the threaded hole is perpendicular to the side surface of the sliding groove, the inner end of the threaded hole is communicated with the sliding groove, and the inner end of the bolt is abutted against the sliding block.
In foretell lower tow boat synchronous feeding structure, the tip of adapter sleeve is fixed with the limiting plate that is used for restricting the slider and drops, the limiting plate on set up the guide way that sets up with the spout is relative, the width of guide way is less than the width of spout, spacing portion be located the tip department of guide way and even as an organic whole with the limiting plate.
In the synchronous feeding structure of the lower tug, one end of the connecting rod is in threaded connection with a first ball connecting rod, the other end of the connecting rod is in threaded connection with a second ball connecting rod, the first ball connecting rod is sleeved on the first hinge shaft, and the second ball connecting rod is sleeved on the second hinge shaft.
In foretell tow boat synchronous feeding structure down, the pendulum rod on set up the fluting that extends along its length direction, foretell articulated shaft two is worn to establish in the fluting, articulated shaft two on link firmly paste the spacing dish that leans on one side of pendulum rod, articulated shaft two on threaded connection have paste the lock nut who leans on the pendulum rod opposite side. The purpose of adjusting the swing angle of the swing rod can be achieved by adjusting the position of the second hinge shaft in the slot. The closer the hinge shaft II is to the rotating shaft, the smaller the swing angle of the swing rod is.
In the synchronous feeding structure of the lower tug, the one-way component comprises a one-way bearing arranged between the rotating shaft and the lower tug. A one-way bearing is one that is free to rotate in one direction and locks in the other direction.
In the synchronous feeding structure of the lower tug, the number of the one-way bearings is 2.
The working process of the lower tug synchronous feeding structure is as follows: when the sewing machine works, the main shaft of the sewing machine rotates to drive the connecting sleeve to rotate, so that the first articulated shaft is driven to do circular motion around the central axis of the connecting sleeve, the first ball connecting rod, the second ball connecting rod and the second articulated shaft drive the oscillating bar to oscillate, the oscillating bar drives the rotating shaft to rotate around the central axis of the rotating shaft, the lower tug is driven to rotate in a single direction under the action of the single-direction bearing, and the synchronous feeding is realized by matching with the upper tug.
Compared with the prior art, this lower tug synchronous feeding structure has following advantage:
the swing angle of the swing rod can be adjusted, so that the cloth pulling amount of the lower towing wheel is changed, different processing requirements are met, and the application range is wide; the connection is convenient, the structure is compact, the lower tug wheel and the upper tug wheel synchronously pull cloth, when multi-layer sewing materials are sewn, the sewing materials are not staggered or wrinkled, and the feeding effect is good.
Drawings
FIG. 1 is a schematic view of a sewing machine according to one embodiment.
Fig. 2 is a schematic structural view of a synchronous feeding structure of a lower tug in the first embodiment.
Fig. 3 is a schematic structural diagram of an adjustment limiting unit in the first embodiment.
FIG. 4 is a side view of the rotating shaft and the swing link in the first embodiment.
In the figure, 1, an upper tug; 2. a rotating shaft; 3. a lower tug; 4. a swing rod; 5. a main shaft; 6. connecting sleeves; 7. a first hinge shaft; 8. a second hinge shaft; 9. a connecting rod; 10. a chute; 11. a slider; 12. a limiting part; 13. an adjusting screw; 14. an annular groove; 15. a limiting plate; 16. a guide groove; 17. a first ball connecting rod; 18. a second ball connecting rod; 19. grooving; 20. a limiting disc; 21. locking the nut; 22. and a one-way bearing.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example one
The lower tug synchronous feeding structure shown in the figures 1 and 2 comprises a rotating shaft 2 which is arranged in a sewing machine workbench in a penetrating mode and is parallel to an upper tug 1, and a lower tug 3 which is coaxially sleeved on the rotating shaft 2, wherein the lower tug 3 is positioned right below the upper tug 1 and is arranged opposite to the upper tug 1, as shown in the figure 1, the lower tug 3 is horizontally arranged, the highest position of the lower tug is not lower than the upper surface of the workbench, and when feeding is needed, the lower tug 3 rotates in a single direction under the action of a transmission assembly. As shown in fig. 1 and 2, a swing link 4 is fixed on the rotating shaft 2, a transmission component for driving the swing link 4 to swing when the main shaft 5 rotates is arranged between the swing link 4 and the main shaft 5 of the sewing machine, and a one-way component for limiting the lower tug 3 to rotate in one way all the time when the swing link 4 swings is arranged between the rotating shaft 2 and the lower tug 3.
As shown in fig. 2, the transmission assembly includes a connecting sleeve 6 coaxially fixed at an end of the main shaft 5, a first hinge shaft 7 eccentrically fixed at an end of the connecting sleeve 6 and parallel to the main shaft 5, a second hinge shaft 8 fixed on the swing rod 4 and parallel to the first hinge shaft 7, and a connecting rod 9 vertically arranged with the first hinge shaft 7, wherein one end of the connecting rod 9 is sleeved on the first hinge shaft 7, and the other end of the connecting rod 9 is sleeved on the second hinge shaft 8. When the main shaft 5 rotates, the connecting sleeve 6 is driven to rotate, the first articulated shaft 7 is driven to do circular motion around the central axis of the connecting sleeve 6, and the oscillating rod 4 is pulled to oscillate within a certain angle range through the connecting rod 9.
As shown in fig. 2, a through sliding groove 10 extending in the radial direction is formed in the end portion of the connecting sleeve 6, a sliding block 11 is arranged in the sliding groove 10 in a matched manner, the first hinge shaft 7 is fixed on the sliding block 11, and an adjusting limiting unit for adjusting the sliding block 11 to a proper position and then fixing the sliding block 11 at the current position is arranged between the sliding block 11 and the connecting sleeve 6.
One end of the sliding chute 10 is provided with a flat limiting part 12, the adjusting limiting unit comprises an adjusting screw 13 in threaded connection with the sliding block 10, as shown in fig. 3, the adjusting screw 13 extends along the length direction of the sliding chute 10, an annular groove 14 is arranged on the adjusting screw 13, and the limiting part 12 is clamped in the annular groove 14.
When the adjusting screw 13 is rotated, the adjusting screw 13 can only rotate in the circumferential direction under the limitation of the annular groove 14 and the limiting part 12, and the adjusting screw 13 is in threaded connection with the slider 10, so that the circumferential motion of the adjusting screw 13 is converted into the linear motion of the slider 10, and the position of the slider 10 in the sliding groove 10 is changed, namely the eccentric position of the first hinge shaft 7 (the vertical distance between the first hinge shaft 7 and the central axis of the connecting sleeve 6) is changed, and the purpose of adjusting the swing angle of the swing rod 4 is achieved. When the swing angle of the swing rod 4 is larger, the rotating speed of the rotating shaft 2 is larger, and the feeding speed of the lower tug 3 is higher.
As shown in fig. 2 and 3, a limiting plate 15 for limiting the sliding block 11 to fall off is fixed at an end of the connecting sleeve 6, a guide groove 16 opposite to the sliding groove 10 is formed in the limiting plate 15, the width of the guide groove 16 is smaller than that of the sliding groove 10, and the limiting portion 12 is located at an end of the guide groove 16 and is connected with the limiting plate 15 into a whole.
As shown in fig. 2, one end of the connecting rod 9 is connected with a first ball connecting rod 17 through a thread, the other end of the connecting rod is connected with a second ball connecting rod 18 through a thread, the first ball connecting rod 17 is sleeved on the first hinge shaft 7, and the second ball connecting rod 18 is sleeved on the second hinge shaft 8.
As shown in fig. 2, the swing rod 4 is flat, a slot 19 extending along the length direction of the swing rod 4 is formed in the swing rod 4, a second hinge shaft 8 is arranged in the slot 19 in a penetrating manner, as shown in fig. 4, a limit disc 20 attached to one side of the swing rod 4 is fixedly connected to the second hinge shaft 8, and a lock nut 21 attached to the other side of the swing rod 4 is connected to the second hinge shaft 8 through threads. The purpose of adjusting the swing angle of the swing rod 4 can be achieved by adjusting the position of the second hinge shaft 8 in the slot 19. The closer the hinge shaft II 8 is to the rotating shaft 2, the smaller the swing angle of the swing rod 4 is.
In this embodiment, the one-way assembly includes a one-way bearing 22 disposed between the rotating shaft 2 and the lower tug 3. The one-way bearing 22 is a bearing that is free to rotate in one direction and is dead-locked in the other direction. Specifically, as shown in fig. 4, the number of the one-way bearings 22 is 2.
The working process of the lower tug synchronous feeding structure is as follows: when the sewing machine works, the main shaft 5 of the sewing machine rotates to drive the connecting sleeve 6 to rotate, so that the first articulated shaft 7 is driven to do circular motion around the central axis of the connecting sleeve 6, the first ball connecting rod 17, the connecting rod 9, the second ball connecting rod 18 and the second articulated shaft 8 drive the swing rod 4 to swing, the swing rod 4 drives the rotating shaft 2 to rotate around the central axis of the rotating shaft, the lower dragging wheel 3 is driven to rotate in a single direction under the action of the one-way bearing 22, and synchronous feeding is realized by matching with the upper dragging wheel 1 which can lift up and down.
Example two
The structure principle of this embodiment is the same basically as the structure principle of embodiment one, and the difference lies in that, adjusts spacing unit including locating the screw hole in the adapter sleeve 6 and threaded connection in the bolt in this screw hole, and the screw hole is mutually perpendicular and the inner of screw hole communicates with spout 10 with the side of spout 10, and the inner of bolt supports and leans on slider 10.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (9)
1. A lower tug synchronous feeding structure comprises a rotating shaft (2) which is arranged in a sewing machine workbench in a penetrating mode and is parallel to an upper tug (1), and a lower tug (3) which is coaxially sleeved on the rotating shaft (2), wherein the lower tug (3) is positioned under the upper tug (1) and is arranged opposite to the upper tug (1), and the lower tug synchronous feeding structure is characterized in that a swing rod (4) is fixed on the rotating shaft (2), a transmission assembly which is used for driving the swing rod (4) to swing when a main shaft (5) rotates is arranged between the swing rod (4) and a main shaft (5) of a sewing machine, and a one-way assembly which is used for limiting the lower tug (3) to rotate in a one-way all the time when the swing rod (4) swings is arranged between the rotating shaft (2) and the lower tug (3); the coaxial adapter sleeve (6) that is fixed with on main shaft (5), the tip of adapter sleeve (6) is seted up radially extending and is link up spout (10), spout (10) fit in be equipped with slider (11), drive assembly locate between slider (11) and pendulum rod (4), slider (11) and adapter sleeve (6) between be equipped with and be used for fixing slider (11) at the spacing unit of regulation at the current position after adjusting slider (11) to suitable position.
2. The lower tug synchronous feeding structure according to claim 1, wherein the transmission assembly comprises a first hinged shaft (7) which is fixed on the sliding block (11), eccentrically arranged with the connecting sleeve (6) and parallel to the main shaft (5), a second hinged shaft (8) which is fixed on the swinging rod (4) and parallel to the first hinged shaft (7), and a connecting rod (9) which is perpendicular to the first hinged shaft (7), one end of the connecting rod (9) is sleeved on the first hinged shaft (7), and the other end of the connecting rod (9) is sleeved on the second hinged shaft (8).
3. The lower tug synchronous feeding structure according to claim 1 or 2, wherein one end of the sliding groove (10) is provided with a limiting part (12), the adjusting limiting unit comprises an adjusting screw (13) in threaded connection with the sliding block (11), the adjusting screw (13) extends along the length direction of the sliding groove (10), an annular groove (14) is formed in the adjusting screw (13), and the limiting part (12) is clamped in the annular groove (14).
4. The lower tug synchronous feeding structure according to claim 1 or 2, wherein the adjusting and limiting unit comprises a threaded hole arranged in the connecting sleeve (6) and a bolt in threaded connection with the threaded hole, the threaded hole is perpendicular to the side surface of the sliding groove (10), the inner end of the threaded hole is communicated with the sliding groove (10), and the inner end of the bolt abuts against the sliding block (11).
5. The lower tug synchronous feeding structure according to claim 3, wherein a limiting plate (15) used for limiting the sliding block (11) to fall off is fixed at the end of the connecting sleeve (6), a guide groove (16) opposite to the sliding groove (10) is formed in the limiting plate (15), the width of the guide groove (16) is smaller than that of the sliding groove (10), and the limiting part (12) is located at the end of the guide groove (16) and is connected with the limiting plate (15) into a whole.
6. The lower tug synchronous feeding structure according to claim 2, wherein one end of the connecting rod (9) is in threaded connection with a first ball connecting rod (17), the other end of the connecting rod is in threaded connection with a second ball connecting rod (18), the first ball connecting rod (17) is sleeved on the first hinge shaft (7), and the second ball connecting rod (18) is sleeved on the second hinge shaft (8).
7. The lower tug synchronous feeding structure according to claim 2, wherein the swing rod (4) is provided with a slot (19) extending along the length direction of the swing rod, the second hinge shaft (8) penetrates through the slot (19), the second hinge shaft (8) is fixedly connected with a limiting disc (20) attached to one side of the swing rod (4), and the second hinge shaft (8) is in threaded connection with a locking nut (21) attached to the other side of the swing rod (4).
8. The synchronous feeding structure of the lower tug boat of claim 1, wherein the one-way assembly comprises a one-way bearing (22) arranged between the rotating shaft (2) and the lower tug boat (3).
9. The lower tug synchronous feeding structure according to claim 8, wherein the number of the one-way bearings (22) is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711119879.1A CN107805889B (en) | 2017-11-14 | 2017-11-14 | Lower tug synchronous feeding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711119879.1A CN107805889B (en) | 2017-11-14 | 2017-11-14 | Lower tug synchronous feeding structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107805889A CN107805889A (en) | 2018-03-16 |
| CN107805889B true CN107805889B (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711119879.1A Active CN107805889B (en) | 2017-11-14 | 2017-11-14 | Lower tug synchronous feeding structure |
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| Country | Link |
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| CN (1) | CN107805889B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950890B (en) * | 2018-07-07 | 2020-07-24 | 黄昌辉 | Cloth feeding device of sewing machine |
| CN108950891B (en) * | 2018-08-15 | 2023-08-04 | 常州智谷机电科技有限公司 | Tug device |
| CN110565277B (en) * | 2019-08-21 | 2024-07-16 | 宁波卡维自动化科技有限公司 | Mop wheel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200964495Y (en) * | 2006-10-31 | 2007-10-24 | 中国标准缝纫机公司上海惠工缝纫机三厂 | Feeder of sewing machine |
| CN201809600U (en) * | 2010-09-26 | 2011-04-27 | 西安标准工业股份有限公司 | Backward-dragging mechanism of sewing machine |
| CN202347240U (en) * | 2011-12-12 | 2012-07-25 | 中国标准缝纫机公司上海惠工缝纫机三厂 | Cloth dragging device for auxiliary device of sewing machine |
| CN203411763U (en) * | 2013-08-24 | 2014-01-29 | 中捷缝纫机股份有限公司 | Synchronous feeding device of sewing machine |
| KR20140115647A (en) * | 2013-03-21 | 2014-10-01 | 박보인 | Feeding apparatus for sewing machine |
| CN204058889U (en) * | 2014-09-05 | 2014-12-31 | 西安标准工业股份有限公司 | A kind of Sewing machines with two-wheel cloth feeding mechanism |
| CN106676765A (en) * | 2016-12-31 | 2017-05-17 | 杰克缝纫机股份有限公司 | Synchronous feeding device and sewing machine |
-
2017
- 2017-11-14 CN CN201711119879.1A patent/CN107805889B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200964495Y (en) * | 2006-10-31 | 2007-10-24 | 中国标准缝纫机公司上海惠工缝纫机三厂 | Feeder of sewing machine |
| CN201809600U (en) * | 2010-09-26 | 2011-04-27 | 西安标准工业股份有限公司 | Backward-dragging mechanism of sewing machine |
| CN202347240U (en) * | 2011-12-12 | 2012-07-25 | 中国标准缝纫机公司上海惠工缝纫机三厂 | Cloth dragging device for auxiliary device of sewing machine |
| KR20140115647A (en) * | 2013-03-21 | 2014-10-01 | 박보인 | Feeding apparatus for sewing machine |
| CN203411763U (en) * | 2013-08-24 | 2014-01-29 | 中捷缝纫机股份有限公司 | Synchronous feeding device of sewing machine |
| CN204058889U (en) * | 2014-09-05 | 2014-12-31 | 西安标准工业股份有限公司 | A kind of Sewing machines with two-wheel cloth feeding mechanism |
| CN106676765A (en) * | 2016-12-31 | 2017-05-17 | 杰克缝纫机股份有限公司 | Synchronous feeding device and sewing machine |
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| CN107805889A (en) | 2018-03-16 |
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Address after: 318014 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |
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