CN105297294A - Up-down differential feeding adjustable cuff sewing machine and electric and manual adjusting method thereof - Google Patents
Up-down differential feeding adjustable cuff sewing machine and electric and manual adjusting method thereof Download PDFInfo
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- CN105297294A CN105297294A CN201510772081.1A CN201510772081A CN105297294A CN 105297294 A CN105297294 A CN 105297294A CN 201510772081 A CN201510772081 A CN 201510772081A CN 105297294 A CN105297294 A CN 105297294A
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- lower differential
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- adjustment
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Abstract
The invention relates to an up-down differential feeding adjustable cuff sewing machine and an electric and manual adjusting method thereof. The up-down differential feeding adjustable cuff sewing machine comprises a machine frame, a feed shaft, a feed lifting rock shaft, a feeder mechanism and a down differential feeding adjusting mechanism. The down differential feeding adjusting mechanism comprises a stepping motor, a transmission crank A, a transmission connecting rod, a transmission crank B, a down differential wrench shaft, a transmission crank C, a down differential adjusting connecting rod and a down differential feeding conversion connecting rod. The down different feeding conversion connecting rod is moved up or down by linking the stepping motor with other parts, and therefore the swing angles of the feed lifting rock shaft and the feed shaft are changed, and electric down differential feeding adjusting is achieved. Manual adjusting is changed, so a down differential adjusting wrench drives the down differential wrench shaft to swing, finally the down differential feeding conversion connecting rod is moved up or down through linkage, and manual down differential feeding adjusting is achieved. By adding electric and manual down differential feeding adjusting, various types of fabric and decoration laces can be easily sewn through the cuff sewing machine, sewing difficulty and sewing cost are lowered, and work efficiency is improved.
Description
Technical field
The present invention relates to sewing machine, is the adjustable cuff sewing machine of a kind of top and bottom feed and electronic and manual adjustment method thereof.
Background technology
Cuff sewing machine in the market, the effect of stitching out when the fabric larger in the face of elasticity is always barely satisfactory, and at clothing shoulder or other positions, when requiring that upper and lower two shell fabrics all will make ornamental fold lace, then feels simply helpless, more difficult satisfied sewing requirement.Like this, not only limit the diversity of garment material, also limit costume design simultaneously.
Summary of the invention
For overcoming above-mentioned deficiency, the object of the invention is to provide the adjustable cuff sewing machine of a kind of top and bottom feed and electronic and manual adjustment method thereof to this area, making it solve, existing upper differential feed PLC technology cuff sewing machine is more difficult is applicable to the technical problem that diversity fabric is made and matting is made.Its objective is and to be achieved through the following technical solutions.
This top and bottom feed is adjustable, and cuff sewing machine comprises frame, feed spool, feed lifting rock shaft, feeding tooth mechanism, lower differential feed regulation, feed spool, feed lifting rock shaft all rotate and are positioned frame, feed spool, both feed lifting rock shafts one end interlock feeding tooth mechanism, the lower differential feed regulation of other end interlock, lower differential feed regulation comprises lower differential feed conversion connecting rod, crank, to link feed spool, feed lifting rock shaft respectively by crank in lower differential feed conversion connecting rod two ends, and feed spool, feed lifting rock shaft move up and down with lower differential feed conversion connecting rod and pivot angle change, it is characterized in that described lower differential feed regulation also comprises stepper motor, driving crank A, kinematic link, driving crank B, allowance below nominal size wrench axle, driving crank C, lower differential regulating connecting rod, described stepper motor is fixed on described frame, stepper motor output shaft to be connected described kinematic link one end by driving crank A, the kinematic link other end to be connected described allowance below nominal size wrench axle one end by driving crank B, allowance below nominal size wrench axle rotates and is positioned frame, the allowance below nominal size wrench axle other end to be connected described lower differential regulating connecting rod one end by described driving crank C, the lower differential regulating connecting rod other end is flexibly connected described lower differential feed conversion connecting rod, this lower differential feed conversion connecting rod is done with the output shaft positive and negative rotation swing of described stepper motor, lower movement.By adopting stepper motor to realize lower differential feed motorized adjustment, degree of regulation is high, effective, and make cuff sewing machine be applicable to diversity fabric and to make and matting is made, sewing efficiency is high.
This cuff sewing machine also comprises manually lower differential feed regulation, manually lower differential feed regulation comprises lower differential adjustment spanner, lower differential adjustable plate, fixing locating part, regulates locating part A, regulates locating part B, described allowance below nominal size wrench axle is fixedly connected with in the middle part of described lower differential adjustment spanner, the arc groove that it is the center of circle that described lower differential adjustable plate is provided with described allowance below nominal size wrench axle axle center, regulate locating part A, regulate locating part B to be all fixed in described arc groove, and adjustable along arc groove fixed position; Described fixing locating part is fixed on described frame, described lower differential adjustment spanner one end is provided with the first lock-bit coordinated with described fixing locating part locking when swinging with it, the lower differential adjustment spanner other end be provided with when swinging with it with the adjustment locating part A in described arc groove, the second lock-bit regulating the corresponding locking of locating part B to coordinate, the 3rd lock-bit; When described lower differential adjustment spanner be rocked to described fixing locating part to coordinate locking with described first lock-bit time, lower differential adjustment spanner is in adjustment initial zero position; Instantly differential adjustment spanner is rocked to described adjustment locating part A when coordinating locking with described second lock-bit or regulate locating part B to coordinate locking with described 3rd lock-bit, lower differential adjustment spanner is in adjustment station, regulates the station after station i.e. lower differential adjustment spanner oscillation adjustment.By setting up manually lower differential feed regulation, coordinate above-mentioned motorized adjustment, regulative mode variation, differential adjustment under facilitating cuff sewing machine.。
Described fixing locating part is provided with axis hole, is provided with elastic component and steel ball in axis hole, and steel ball is under elastic component elastic reaction, and part steel ball stretches out axis hole and offsets with the plate face activity of described lower differential adjustment spanner one end; Described adjustment locating part A, adjustment locating part B include regulating shaft, adjusting knob separately, axis hole is provided with in described regulating shaft, elastic component and steel ball is provided with equally in this axis hole, steel ball is under elastic component elastic reaction, and part steel ball stretches out axis hole and offsets with the plate face activity of the described lower differential adjustment spanner other end; Described adjustment locating part A, adjustment locating part B are all fixedly clamped in the arc groove of described lower differential adjustable plate by corresponding regulating shaft and adjusting knob threaded engagement; Described first lock-bit, the second lock-bit, the 3rd lock-bit are the circular hole that bore is less than described steel ball sphere diameter.
Position between second lock-bit of described lower differential adjustment spanner one end and the 3rd lock-bit is provided with bolt hole, and bolt hole connects caging bolt; When described lower differential adjustment spanner be rocked to regulate locating part A to coordinate locking with described second lock-bit time, described caging bolt end and described adjustment locating part A offset spacing; When described lower differential adjustment spanner be rocked to regulate locating part B to coordinate locking with described 3rd lock-bit time, described caging bolt end and described adjustment locating part B offset spacing.
The motorized adjustment method of this top and bottom feed is adjustable cuff sewing machine is: when described stepper motor output shaft rotary oscillation, stepper motor links described driving crank A, kinematic link, driving crank B swings, driving crank B links described allowance below nominal size wrench axle rotary oscillation, allowance below nominal size wrench axle links described driving crank C then, lower differential regulating connecting rod swings, lower differential regulating connecting rod drives on described lower differential feed conversion connecting rod and moves or move down, lower differential feed conversion connecting rod moves or moves down the described feed spool of interlock, the pivot angle change of feed lifting rock shaft, realize electronic lower differential feed to regulate.
The manual adjustment method of this top and bottom feed is adjustable cuff sewing machine is: under original state, the first lock-bit of described lower differential adjustment spanner coordinates with described fixing locating part locking, does not now regulate lower differential feed, when the described lower differential adjustment spanner of swing, described second lock-bit is coordinated with described adjustment locating part A locking or described 3rd lock-bit coordinates with described adjustment locating part B locking time, lower differential adjustment spanner turns over an angle, lower differential adjustment spanner drives described allowance below nominal size wrench axle rotary oscillation, allowance below nominal size wrench axle links described driving crank C then, lower differential regulating connecting rod swings, the described lower differential feed conversion connecting rod of lower differential regulating connecting rod interlock moves or moves down, lower differential feed conversion connecting rod moves or moves down the described feed spool of interlock, the pivot angle change of feed lifting rock shaft, realize manually lower differential feed to regulate.
In the method that above-mentioned manual lower differential feed regulates, by regulating described adjustment locating part A, regulating the fixed position of locating part B in described arc groove, thus regulate allowance below nominal size wrench axle to swing the angle put in place, the amount of moving or the amount of moving down on the described lower differential feed conversion connecting rod of corresponding change, realize the adjustment of lower differential feed amount.
On the basis of the present invention's differential feed PLC technology cuff sewing machine on existing, add the electronic of lower differential feed and manual adjustment means, multiple fabric and making of multiple matting is made to become more free and relaxed, improve the operating efficiency that this type of makes operation, reduce and make difficulty and make cost.Be suitable as cuff sewing machine to use, or the structure of same category of device is improved.
Accompanying drawing explanation
Fig. 1 is the structural representation of the electronic lower differential feed regulation of the present invention.
Fig. 2 is confined explosion's structural representation of differential feed regulation under the present invention manually.
Fig. 3 is the part-structure exploded perspective view of differential feed regulation under the present invention manually.
In figure, the name of sequence number is called: 1, input terminal, 2, control cabinet, 3, stepper motor, 4, driving crank A, 5, kinematic link, 6, driving crank B, 7, allowance below nominal size wrench axle, 8, driving crank C, 9, lower differential regulating connecting rod, 10, lower differential feed conversion connecting rod, 11, feed lifting rock shaft, 12, feed spool, 13, feeding tooth mechanism, 14, lower differential adjustment spanner, 1401, first lock-bit, 1402, second lock-bit, 1403, 3rd lock-bit, 15, lower differential adjustable plate, 1501, arc groove, 16, fixing locating part, 17, regulate locating part A, 18, regulate locating part 2, 19, regulating shaft, 20, adjusting knob, 21, elastic component, 22, steel ball, 23, caging bolt.
Detailed description of the invention
Now by reference to the accompanying drawings, the invention will be further described.
The present invention be differential PLC technology cuff sewing machine existing basis on add lower differential feed regulation, therefore be not described in detail upper differential portion, only emphasis describes lower differential feed regulation.
As shown in Figure 1, this top and bottom feed is adjustable, and cuff sewing machine comprises frame, feed spool 12, feed lifting rock shaft 11, feeding tooth mechanism 13, lower differential feed regulation, feed spool, feed lifting rock shaft all rotates and is positioned frame, feed spool, both feed lifting rock shafts one end interlock feeding tooth mechanism, the lower differential feed regulation of other end interlock, lower differential feed regulation comprises lower differential feed conversion connecting rod, crank, to link feed spool respectively by crank in lower differential feed conversion connecting rod two ends, feed lifting rock shaft, and feed spool, feed lifting rock shaft move up and down with lower differential feed conversion connecting rod 10 and pivot angle change, thus regulate the lower differential feed amount of feeding tooth mechanism.Concrete structure is: lower differential feed regulation also comprises stepper motor 3, driving crank A4, kinematic link 5, driving crank B6, allowance below nominal size wrench axle 7, driving crank C8, lower differential regulating connecting rod 9, and the input terminal 1 of control step motor rotary oscillation and control cabinet 2.Stepper motor is fixed on frame by motor rack, stepper motor output shaft is fixedly connected with driving crank A, driving crank A is flexibly connected kinematic link one end by articulated elements, the kinematic link other end is flexibly connected driving crank B by articulated elements, driving crank B is fixedly connected with allowance below nominal size wrench axle one end, allowance below nominal size wrench axle is rotated by axle sleeve and is positioned frame, the allowance below nominal size wrench axle other end is fixedly connected with driving crank C, driving crank C is flexibly connected lower differential regulating connecting rod one end by articulated elements, the lower differential regulating connecting rod other end is flexibly connected in the middle part of lower differential feed conversion connecting rod by articulated elements.Be connected by above-mentioned, under realizing stepper motor coordinated signals, differential feed conversion connecting rod moves up and down, thus changes feed lifting rock shaft, feed spool pivot angle, realizes electronic lower differential feed and regulates.
As shown in Figure 2, this cuff sewing machine also comprises manually lower differential feed regulation, and manually lower differential feed regulation comprises lower differential adjustment spanner 14, lower differential adjustable plate 15, fixing locating part 16, regulates locating part A17, regulates locating part B18.Be fixedly connected with allowance below nominal size wrench axle 7 in the middle part of lower differential adjustment spanner, lower differential adjustable plate is provided with the arc groove 1501 that following differential wrench shaft axle center is the center of circle.Fixing locating part is fixed on frame, and fixing locating part is provided with axis hole, is provided with elastic component 21 and steel ball 22 in axis hole, and steel ball is under elastic component elastic reaction, and steel ball part is stretched out axis hole and offseted with the plate face activity of lower differential adjustment spanner one end.Regulate locating part A, regulate locating part B to be all fixed in arc groove and adjustable along arc groove fixed position, to be specially: regulate locating part A, regulate locating part B to be equipped with regulating shaft 19, adjusting knob 20 separately, to be fixedly clamped in arc groove by regulating shaft and adjusting knob threaded engagement.Be provided with axis hole in regulating shaft, be provided with elastic component and steel ball equally in axis hole, steel ball is under elastic component elastic reaction, and steel ball part is stretched out axis hole and offseted with the plate face activity of the lower differential adjustment spanner other end.Lower differential adjustment spanner one end is provided with the first lock-bit 1401 coordinated with the steel ball locking of fixing locating part when swinging with it, the lower differential adjustment spanner other end be provided with when swinging with it with the adjustment locating part A in arc groove, the second lock-bit 1402, the 3rd lock-bit 1403 that regulate the corresponding locking of locating part B steel ball separately to coordinate.Above first lock-bit, the second lock-bit, the 3rd lock-bit are the circular hole that bore is less than steel ball sphere diameter.Instantly, the steel ball that differential adjustment spanner is rocked to fixing locating part coordinates locking during with the first lock-bit, lower differential adjustment spanner is in adjustment initial zero position; Instantly when differential adjustment spanner is rocked to and regulates the steel ball of locating part A to coordinate locking with the second lock-bit or regulate the steel ball of locating part B to coordinate locking with the 3rd lock-bit, lower differential adjustment spanner is in adjustment station, regulates the station after station i.e. lower differential adjustment spanner oscillation adjustment.
In order to make lower differential adjustment spanner 14 can reliably be rocked to adjustment station, the position between second lock-bit 1402 of lower differential adjustment spanner one end and the 3rd lock-bit 1403 is provided with bolt hole, and bolt hole connects caging bolt 23.Instantly, when differential adjustment spanner is rocked to and regulates locating part A17 and corresponding second lock-bit to coordinate locking, caging bolt end and adjustment locating part A offset spacing; Instantly, when differential adjustment spanner is rocked to and regulates locating part B18 and corresponding 3rd lock-bit to coordinate locking, caging bolt end and adjustment locating part B offset spacing.
The electronic lower differential feed control method of this top and bottom feed is adjustable cuff sewing machine is: input required Differential Control parameter by input terminal 1, by controller 2 control step motor 3 output shaft rotary oscillation, stepper motor interlock driving crank A4, kinematic link 5, driving crank B6 swings, driving crank B interlock allowance below nominal size wrench axle 7 rotary oscillation, allowance below nominal size wrench axle links driving crank C8 then, lower differential regulating connecting rod 9 swings, lower differential regulating connecting rod drives on lower differential feed conversion connecting rod 10 and moves or move down, lower differential feed conversion connecting rod moves or moves down interlock feed spool 12, the pivot angle change of feed lifting rock shaft 11, realize electronic lower differential feed to regulate.
The manually lower differential feed control method of this top and bottom feed is adjustable cuff sewing machine is: under original state, the first lock-bit 1401 of lower differential adjustment spanner 14 coordinates with fixing locating part 16 locking, does not now regulate lower differential feed.When needs regulate lower differential feed, first adjustment regulates locating part A17 or regulates the fixed position of locating part B18 in lower differential adjustable plate 15 arc groove 1501, method of adjustment is: by unscrewing the adjusting knob 20 regulating locating part A or regulate locating part B, make adjustment locating part A or regulate locating part B to be free to slide adjustment in arc groove, after adjusting to desired location, by adjusting knob locking.Next, lower differential adjustment spanner can be operated.When the lower differential adjustment spanner of swing, make the second lock-bit 1402 with when regulating locating part A locking to coordinate or the 3rd lock-bit 1403 coordinates with adjustment locating part B locking, lower differential adjustment spanner turns over an angle, lower differential adjustment spanner drives allowance below nominal size wrench axle 7 rotary oscillation, allowance below nominal size wrench axle links driving crank C8 then, lower differential regulating connecting rod 9 swings, the lower differential feed conversion connecting rod 10 of lower differential regulating connecting rod interlock moves or moves down, lower differential feed conversion connecting rod moves or moves down interlock feed spool 12, the pivot angle change of feed lifting rock shaft 11, realize manually lower differential feed to regulate.
Above content is intended to technological means of the present invention is described, and unrestricted technical scope of the present invention.Those skilled in the art do apparent improvement in conjunction with existing common practise to the present invention, within the protection domain also falling into the claims in the present invention.
Claims (7)
1. the adjustable cuff sewing machine of top and bottom feed, it comprises frame, feed spool (12), feed lifting rock shaft (11), feeding tooth mechanism (13), lower differential feed regulation, feed spool, feed lifting rock shaft all rotates and is positioned frame, feed spool, both feed lifting rock shafts one end interlock feeding tooth mechanism, the lower differential feed regulation of other end interlock, lower differential feed regulation comprises lower differential feed conversion connecting rod (10), crank, to link feed spool respectively by crank in lower differential feed conversion connecting rod two ends, feed lifting rock shaft, and feed spool, feed lifting rock shaft move up and down with lower differential feed conversion connecting rod and pivot angle change, it is characterized in that described lower differential feed regulation also comprises (3), driving crank A(4), kinematic link (5), driving crank B(6), allowance below nominal size wrench axle (7), driving crank C(8), lower differential regulating connecting rod (9), described stepper motor is fixed on described frame, stepper motor output shaft to be connected described kinematic link one end by driving crank A, the kinematic link other end to be connected described allowance below nominal size wrench axle one end by driving crank B, allowance below nominal size wrench axle rotates and is positioned frame, the allowance below nominal size wrench axle other end to be connected described lower differential regulating connecting rod one end by described driving crank C, the lower differential regulating connecting rod other end is flexibly connected described lower differential feed conversion connecting rod, this lower differential feed conversion connecting rod is done with the output shaft positive and negative rotation swing of described stepper motor, lower movement.
2. the adjustable cuff sewing machine of top and bottom feed according to claim 1, it is characterized in that this cuff sewing machine also comprises manually lower differential feed regulation, manually lower differential feed regulation comprises lower differential adjustment spanner (14), lower differential adjustable plate (15), fixing locating part (16), regulate locating part A(17), regulate locating part B(18), described allowance below nominal size wrench axle (7) is fixedly connected with in the middle part of described lower differential adjustment spanner, the arc groove (1501) that it is the center of circle that described lower differential adjustable plate is provided with described allowance below nominal size wrench axle axle center, regulate locating part A, locating part B is regulated all to be fixed in described arc groove, and it is adjustable along arc groove fixed position, described fixing locating part is fixed on described frame, described lower differential adjustment spanner one end is provided with the first lock-bit (1401) coordinated with described fixing locating part locking when swinging with it, the lower differential adjustment spanner other end be provided with when swinging with it with the adjustment locating part A in described arc groove, the second lock-bit (1402) regulating the corresponding locking of locating part B to coordinate, the 3rd lock-bit (1403), when described lower differential adjustment spanner be rocked to described fixing locating part to coordinate locking with described first lock-bit time, lower differential adjustment spanner is in adjustment initial zero position, instantly differential adjustment spanner is rocked to described adjustment locating part A when coordinating locking with described second lock-bit or regulate locating part B to coordinate locking with described 3rd lock-bit, lower differential adjustment spanner is in adjustment station, regulates the station after station i.e. lower differential adjustment spanner oscillation adjustment.
3. the adjustable cuff sewing machine of top and bottom feed according to claim 2, it is characterized in that described fixing locating part (16) is provided with axis hole, elastic component (21) and steel ball (22) is provided with in axis hole, steel ball is under elastic component elastic reaction, and steel ball part is stretched out axis hole and offseted with the plate face activity of described lower differential adjustment spanner (14) one end; Described adjustment locating part A(17), regulate locating part B(18) include regulating shaft (18), adjusting knob (20) separately, axis hole is provided with in described regulating shaft, elastic component and steel ball is provided with equally in this axis hole, steel ball is under elastic component elastic reaction, and steel ball part is stretched out axis hole and offseted with the plate face activity of the described lower differential adjustment spanner other end; Described adjustment locating part A, adjustment locating part B are all fixedly clamped in the arc groove (1501) of described lower differential adjustable plate (15) by corresponding regulating shaft and adjusting knob threaded engagement; Described first lock-bit (1401), the second lock-bit (1402), the 3rd lock-bit (1403) are the circular hole that bore is less than described steel ball sphere diameter.
4. the top and bottom feed according to Claims 2 or 3 is adjustable cuff sewing machine, it is characterized in that the position between second lock-bit (1402) of described lower differential adjustment spanner (14) one end and the 3rd lock-bit (1403) is provided with bolt hole, bolt hole connects caging bolt (23); Locating part A(17 is regulated when described lower differential adjustment spanner is rocked to) when coordinating locking with described second lock-bit, described caging bolt end and described adjustment locating part A offset spacing; Locating part B(18 is regulated when described lower differential adjustment spanner is rocked to) when coordinating locking with described 3rd lock-bit, described caging bolt end and described adjustment locating part B offset spacing.
5. the motorized adjustment method of the adjustable cuff sewing machine of top and bottom feed as claimed in claim 1, it is characterized in that when described stepper motor (3) output shaft rotary oscillation, stepper motor links described driving crank A(4), kinematic link (5), driving crank B(6) swing, driving crank B links described allowance below nominal size wrench axle (7) rotary oscillation, allowance below nominal size wrench axle links described driving crank C(8 then), lower differential regulating connecting rod (9) swings, lower differential regulating connecting rod drives on described lower differential feed conversion connecting rod (10) and moves or move down, lower differential feed conversion connecting rod moves or moves down the described feed spool of interlock (12), the pivot angle change of feed lifting rock shaft (11), realize electronic lower differential feed to regulate.
6. the manual adjustment method of the adjustable cuff sewing machine of top and bottom feed as claimed in claim 2, under it is characterized in that original state, first lock-bit (1401) of described lower differential adjustment spanner (14) coordinates with described fixing locating part (16) locking, does not now regulate lower differential feed, when the described lower differential adjustment spanner of swing, make described second lock-bit (1402) and described adjustment locating part A(17) locking coordinates or described 3rd lock-bit (1403) and described adjustment locating part B(18) locking is when coordinating, lower differential adjustment spanner turns over an angle, lower differential adjustment spanner drives described allowance below nominal size wrench axle (7) rotary oscillation, allowance below nominal size wrench axle links described driving crank C(8 then), lower differential regulating connecting rod (9) swings, the described lower differential feed conversion connecting rod (10) of lower differential regulating connecting rod interlock is moved or moved down, lower differential feed conversion connecting rod moves or moves down the described feed spool of interlock (12), the pivot angle change of feed lifting rock shaft (11), realize manually lower differential feed to regulate.
7. the manual adjustment method of the adjustable cuff sewing machine of top and bottom feed according to claim 6, it is characterized in that by regulating described adjustment locating part A(17), regulate locating part B(18) fixed position in described arc groove (1501), thus regulate allowance below nominal size wrench axle (7) to swing the angle put in place, the amount of moving or the amount of moving down on the described lower differential feed conversion connecting rod (10) of corresponding change, realize the adjustment of lower differential feed amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772081.1A CN105297294B (en) | 2015-11-12 | 2015-11-12 | Top and bottom feed is adjustable cuff sewing machine and its electronic and manual adjustment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772081.1A CN105297294B (en) | 2015-11-12 | 2015-11-12 | Top and bottom feed is adjustable cuff sewing machine and its electronic and manual adjustment method |
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| CN105297294A true CN105297294A (en) | 2016-02-03 |
| CN105297294B CN105297294B (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510772081.1A Active CN105297294B (en) | 2015-11-12 | 2015-11-12 | Top and bottom feed is adjustable cuff sewing machine and its electronic and manual adjustment method |
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| CN107916500A (en) * | 2017-12-07 | 2018-04-17 | 宁波三合鑫自动化有限公司 | Roll up S type bottom special mechanisms |
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| CN105297294B (en) | 2017-10-03 |
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