CN105986371A - Automatic feeding device of sewing machine - Google Patents
Automatic feeding device of sewing machine Download PDFInfo
- Publication number
- CN105986371A CN105986371A CN201510187084.9A CN201510187084A CN105986371A CN 105986371 A CN105986371 A CN 105986371A CN 201510187084 A CN201510187084 A CN 201510187084A CN 105986371 A CN105986371 A CN 105986371A
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- material strip
- sewing machine
- assembly
- cut
- feeding
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Abstract
The invention provides an automatic feeding device of a sewing machine. The automatic feeding device comprises a bracket, a material band dragging assembly, a cutting assembly and a control circuit. Under the joint operation of the control circuit, the material band dragging assembly and the cutting assembly, a continuous material band is dragged and delivered towards a cloth pressing pin of the sewing machine by being matched with an action of a sewing machine pedal switch. The processing capacity of sewing machine operation can be effectively improved, material band torsion can be further effectively prevented under the limitation and guide of the material band dragging assembly, and the processing defects of sewing operation is remarkably decreased.
Description
Invention field
The present invention is about a kind of automatic feeding, particularly relates to a kind of can automatically feed seriality material strip and cut band
Sewing machine automatic feeding.
Background technology
Pressing, sewing machine is the capital equipment that rag trade is indispensable, and the most traditional sewing machine is many by the manpower side of trampling
Formula drives sewing pin, and along with the progress of science and technology, the most conventional sewing machine mostly is DYN dynamic sewing machine, mainly through horse
Reach driving sewing pin, accelerate sewing speed and increase productivity, and whether motor running can be controlled by a pedal switch,
To increase the convenience of sewing operation.
Furthermore, in many sewing processing operations, it is necessary to the decorative object (such as lace sheet) that quantity does not waits is sewed at product
On, and mostly similar decorative object be in the way of material strip to present, in order to it is cut to suitable length according to actual demand
Use, and relatively have convenience receiving or taking.
When the actual sewing operation carrying out material strip, if according to coordinating product specification to be cut in advance by material strip in advance suitably
Length, then the material strip after cutting is sewed on product, the state reversed, behaviour is formed owing to the material strip after cutting is as easy as rolling off a log
Make personnel and must notice whether material strip tail end has the situation of torsion at any time, enable the compress allowing material strip enter sewing machine smoothly
Foot, thus results in operational inconvenience, the most easily produces sewing flaw, so that sewing cannot effectively be promoted
Processing operation production capacity and quality.
Especially, when having the material strip sewing processing operation that several sewing machines carry out like products, relatively cannot control total seam simultaneously
The issuable fraction defective of machine of threading, and cannot accurately estimate that must to tailor the material strip of many small number standby, not only increase material strip
The difficulty of quantity keyholed back plate, more can therefore derive more material purchase, warehouse cost.
Summary of the invention
In view of this, the pay-off commonly used then is improved by applicant, it is provided that a kind of sewing machine self-feeding dress
Put.
The main object of the present invention is to provide a kind of sewing machine automatic feeding, and it has can feed seriality material automatically
Carry and cut the function of band, can effectively promote processing production capacity effect, and the generation that add man-hour flaw is greatly reduced.
For reaching above-mentioned purpose, the sewing machine automatic feeding of the present invention, it is provided at a sewing machine with a cloth pressing foot
At periphery, wear with the material strip for a sequential like and material strip is sent into this sewing machine, and including a bracket, being installed on this
On sewing machine and be provided with a swing arm；One material strip towing assembly, device is on this bracket and has a material-feeding rolling wheels and a material strip
Compacting wheel, this material strip compacting wheel is located in this swing arm, and this material strip compacting wheel shaft is set along in this torr with this material-feeding rolling wheels
On frame one end, phase para-position is in the position by both sides, path of this material strip, and separately this bracket is provided with one first pneumatic cylinder assembly,
In order to drive this swing arm to swing；One cutting assembly, has one first cut-off knife and one second cut-off knife corresponding intrument at this
The lower section that material-feeding rolling wheels is taken turns with the compacting of this material strip, and same phase para-position is in the both sides by path of this material strip, separately in this torr
Frame is provided with one for driving the second driving assembly of this first cut-off knife and this second cut-off knife relative displacement；One control circuit, electricity
It is connected to a knee switch, this first pneumatic cylinder assembly, this second driving assembly, for needing to cut off the feelings of this material strip
Under condition, start this knee switch and control this through this control circuit and second drive assembly to activate this second cut-off knife and cut out this material
During band, it is possible to this first pneumatic cylinder assembly of Synchronization Control swings this swing arm and takes turns, to roll with this feeding to move the compacting of this material strip
Take turns this material strip the most sandwiched and do not cut out place, make this material strip maintain and former wear position, be used for feeding next time.
Described control circuit is more electrically connected with a foot switch and with the tension adjustment assembly worn for this material strip, with
For when sewing, start this foot switch and through this control circuit to move this material strip compacting wheel so that it is roll with this feeding
Wheel, in the operating state opened, carries out tension force control in order to this tension adjustment assembly to this material strip.
Described control circuit is more electrically connected with a foot switch, and this material strip towing assembly is provided with this material-feeding rolling wheels of a driving
First rotated drives assembly, and this control circuit controls setting and the signal of this foot switch according to what acquiescence was preset, comes
Control this first driving assembly, whether this second driving assembly operates.
The first described driving assembly is a motor.
Described sewing machine automatic feeding is to be further provided with the most horizontal support stretching in above this sewing machine place, in
This support is provided with one for accepting the support wheel of material strip, and one for the 3rd driving assembly driving this support wheel to rotate, and this is the years old
Three drive assembly and are electrically connected with this control circuit.
The 3rd described driving assembly is a motor.
Described bracket has further included a feeding hopper, and this feeding hopper is relatively located at below this first and second cut-off knife place and has one
To the material strip guide hole tilted towards this cloth pressing foot direction, in order to be connected this material strip.
Described bracket has further included a gas blow pipe group, in order to blow this material strip, makes to allow this material under airflow function
The front end of band enters below this cloth pressing foot.The second described driving assembly is a pneumatic cylinder assembly, in order to drive this second sanction
Cutter swings, and makes this second cut-off knife and this first cut-off knife jointly cut off this material strip.
Described control circuit is that the control panel at this sewing machine front is located in electrical connection one relatively.
The technological means that the sewing machine automatic feeding of the present invention is provided, can be at control circuit, material strip towing assembly
And under the integrating operation of cutting assembly, need not the most manually wear material strip after cutting band every time, effectively promote sewing machine operation
Processing production capacity, and material strip towing assembly restriction, guide under, effective anti-stopping materials strip reverse, sewing is greatly reduced
The processing flaw of operation, is suitably applied the sewing processing operation of successional webbing especially；Especially, it is to sew each time
When action is nearly completed, then the material strip severing that will have sewed, relatively contribute to controlling material strip quantity, and then reduce material
Purchase, warehouse cost.
Accompanying drawing explanation
Fig. 1 is the use configuration status figure of present pre-ferred embodiments；
Fig. 2 is the use configuration status figure at another visual angle of present pre-ferred embodiments；
Fig. 3 is the schematic perspective view of present pre-ferred embodiments；
Fig. 4 is the schematic perspective view of material strip towing assembly in the present invention；
Fig. 5 is the schematic diagram that the towing of present invention material strip in a state of use delivers；
Fig. 6 is the schematic perspective view of tension adjustment assembly in the present invention；
Fig. 7 is the close-up schematic view of cutting assembly in the present invention；
Fig. 8 is the schematic diagram that present invention material strip in a state of use enters between material strip towing assembly；
Fig. 9 is the schematic diagram that present invention material strip in a state of use enters between cutting assembly；
Figure 10 is that neat schematic diagram is repaiied in material strip front end by present invention cutting assembly in a state of use；
Figure 11 is that material strip is sent into the schematic diagram below cloth pressing foot when lifting on cloth pressing foot by the present invention；
Figure 12 is that present invention cloth pressing foot after material strip enters cloth pressing foot coordinates the schematic diagram resetted；
Figure 13 is present invention operating state schematic diagram of material strip towing assembly when sewing action；
Figure 14 is that the present invention coordinates the operating state schematic diagram of material strip severing before sewing action completes.
Detailed description of the invention
Referring to shown in Fig. 1 to Fig. 5, sewing machine automatic feeding of the present invention is provided at the periphery of a sewing machine 10,
And controlled by the foot switch 11 of sewing machine 10, to coordinate, material strip 20 elastic for the tool of a sequential like is sent into sewing
Machine 10.
Automatic feeding includes bracket 30, material strip towing assembly 40, cutting assembly 50, and one controls electricity
Road 60.
Bracket 30 is installed on the front of sewing machine 10, and is located relatively at the front of cloth pressing foot 12, in time assembling, and torr
Frame 30 can be integrally provided on sewing machine 10, or is installed on sewing machine 10 in the way of screw locking.
Material strip towing assembly 40 by device on bracket 30 together group be located at the front of sewing machine 10, and material strip drags
Drag assembly 40 and there is material-feeding rolling wheels 41, material strip compacting wheel 42,1 first driving assembly 43, swing arm 44 and
First pneumatic cylinder assembly 45.
Material-feeding rolling wheels 41 and material strip compacting wheel 42 devices are on bracket 30 wherein one end, and lay respectively at material strip 20 and pass through
The position of both sides, path, and on bracket 30 other end, it is equiped with the first driving assembly driving material-feeding rolling wheels 41 to rotate
43 and the first pneumatic cylinder assembly 45.In time assembling, prior to being pivoted with a swing arm 44 on bracket 30, with by material strip compacting wheel
42 are located in swing arm 44 on it, and the first pneumatic cylinder assembly 45 is in order to drive swing arm 44 to carry out reciprocally swinging, and are electrically connected
It is connected to control circuit 60, makes to make material-feeding rolling wheels 41 and material strip compacting wheel under the start of the first pneumatic cylinder assembly 45
Entire effect is opened in 42 generations.
Bracket 30 is arranged at least one support bar 32 at material strip compacting wheel 42 relatively, positions in order to feed strip 20 stay bolt.
Cutting assembly 50 is that position is pulled between assembly 40 at the cloth pressing foot 12 of sewing machine 10 and the material strip in its front, cutting
Assembly 50 is installed on bracket 30 equally, and cutting assembly 50 includes one first cut-off knife 51,1 second cut-off knife 52 and uses
To drive the second driving assembly 53 of first and second cut-off knife 51,52 relative displacement.
First cut-off knife 51 and the second cut-off knife 52 lay respectively at material strip 20 and pass through both sides, path, and material-feeding rolling wheels 41, material strip
Compacting wheel 42 is located at material strip 20 one on the other the most respectively by both sides, path with this two cut-off knife.In time implementing,
First and second cut-off knife 51,52 is fixedly arranged on bracket 30 takes turns at 42 the same sides with material-feeding rolling wheels 41, material strip compacting, and the
Two driving assemblies 53 are to be located on bracket 30, in order to drive the second pneumatic cylinder assembly of the second cut-off knife 52 reciprocally swinging
Constitute, make, through first, second cut-off knife 51, the mutually split entire action of cut-off knife 52, to be pointed to the material strip passed through therebetween
20 produce cutting effect.
Control circuit 60 is electrically connected to foot switch 11, first and drives assembly 43, second to drive assembly 53, in order to foundation
Its control giving tacit consent to loading in advance is determined and the signal of foot switch 11, controls the first driving assembly 43, second and drives
Whether assembly 53 operates；In time implementing, control circuit 60 is to be electrically coupleable to one be relatively located at sewing machine 10 front
Control panel 61, to be user-friendly for associative operation, setting.
Furthermore, the sewing machine automatic feeding of the present invention, in time being embodied as, is to be further provided with one the most horizontal to stretch in
The support 70 at place above sewing machine 10, is provided with one in support 70 and takes turns 71 for accepting the support of material strip 20, and one supplies to drive
Dynamic support takes turns 71 the 3rd driving assemblies 72 rotated, and the 3rd drives assembly 72 to be electrically connected to control circuit 60 equally.
Shown in ginseng Fig. 5 to Fig. 7, sewing machine automatic feeding arranges a tension adjustment further on support 70
Assembly 80, to coordinate material strip 20 tension adjustment, makes material strip 20 normally be pulled delivery, and guarantees sewing quality.
In the present embodiment, support 70 is additionally provided with a upper support bar 731 between support wheel 71 and tension adjustment assembly 80, and
Between tension adjustment assembly 80 and sewing machine 10, it is again provided with a lower support bar 732, uses support by material thereon
Band 20.
And on bracket 30, as shown in Figure 7, be to locate below first and second cut-off knife 51,52 further, it is provided with one
In order to accept the feeding hopper 31 of material strip 20.Feeding hopper 31 have one downwardly toward sewing machine 10 cloth pressing foot 12 direction tilt
The material strip guide hole 311 of configuration, and feeding hopper 31 internal tool dividing plate width adjustable.
Before carrying out feeding, after material strip 20 first passes through the support wheel 71 on support 70 and upper support bar 731, pile warp
Tension adjustment assembly 80 associated component enters the material strip towing assembly 40 in sewing machine 10 front again by lower support bar 732
With cutting assembly 50.
Material strip 20 in said process, utilize upper and lower support bar 731,732 can towing delivery process in by material strip 20
Smooth, and in order to accept supporting wheel 71 and rotating under the 3rd driving driving assembly 72 and feed or greatly of material strip 20
Amplitude swings up and down, and reverses uneven section to be sent to unclamp on material strip 20.
After material strip 20 is by lower support bar 732, as shown in Figure 8, after the support bar 32 on pile warp bracket 30,
Control material-feeding rolling wheels 41 and material strip compacting wheel 42 sandwiched material strips 20, to treat follow-up feeding action.
Its operating process of automatic feeding in the present embodiment is:
During feeding, control material-feeding rolling wheels 41 and material strip compacting wheel 42 rotation through control circuit 60, with by material strip 20 such as
Shown in Fig. 9, sequentially suppress wheel 42 through material-feeding rolling wheels 41 and material strip, and enter into first, second cut-off knife 51,
Between 52.
If material strip 20 is for carrying out threading for the first time, the most as shown in Figure 10, the knee switch (figure of cutting assembly 50 is first started
In do not show) or be set by guidance panel 61, strip of having one's hair trimmed 20 front end is standby.
Then, as shown in Figure 11, material-feeding rolling wheels 41 is rotated further with material strip compacting wheel 42 and carries out feeding, and coordinates
The foot switch 11 of post legged sewing machine 10, makes to lift on the cloth pressing foot 12 of sewing machine 10, can pull assembly 40 at material strip
Under running, by material strip 20 through the guide hole 311 of feeding hopper 31, lead into below cloth pressing foot 12 through feeding hopper 31,
The gas blow pipe group (not shown) on bracket 30 can be coordinated in the process to impose a blowing action, can be in the effect of air-flow
Under allow material strip 20 front end rapidly enter below cloth pressing foot 12.
After material strip 20 does enter into below cloth pressing foot 12, as shown in figure 12, it is manually advanced and waits to stitch the cloth knitted, and
The foot switch 11 of reset sewing machine 10, makes the cloth pressing foot 12 of sewing machine 10 reset, to treat follow-up sewing action.
During sewing, the foot switch 11 of former riding sewing machine 10, proceed by relevant sewing action；Now, through control
Circuit 60 processed control the first pneumatic cylinder assembly 45 to move material strip compacting wheel 42, make two rollers in the operating state opened,
As shown in figure 13, and tension of engagement adjusts assembly 80, so that released material strip 20 is carried out tension force control, and can foundation
Sewing demand adjusts the Tensity size of material strip 20.
When sewing a to paragraph needs cutting, as shown in figure 14, first start the knee switch (not shown) of cutting assembly 50,
Material strips 20 between control circuit 60 can automatically control entire upper for material strip compacting wheel 42 and clamping two rollers simultaneously, then by the
One, the second cut-off knife 51,52 synchronizes automatic shearing band.Finally by complete, i.e. for material strip 20 sewing remaining in feeding hopper 31
Complete once to stitch to knit.
Knit as being intended to the seam carried out next time because previous seam knit after material strip 20 tail end, be to be fed when cutting band action
Roller 41 is clamping with material strip compacting wheel 42 institute, need not the most manually wear the step of that is repeatable Fig. 9 to Figure 14 of material strip 20
Suddenly carry out the seam directly carried out next time to knit, can effectively promote the processing production capacity of sewing machine 10 operation, and drag at material strip
Drag under the restriction of assembly 40, guiding, can reverse by the most anti-stopping materials strip 20, the processing flaw of sewing operation is greatly reduced.
In principle, the sewing machine automatic feeding in the present invention, in time using, can drag at control circuit 60, material strip
Drag under the integrating operation of assembly 40 and cutting assembly 50, coordinate foot switch 11 action of sewing machine 10, material strip drag
Drag assembly 40 to be delivered towards the cloth pressing foot 12 direction towing of sewing machine 10 by successional material strip 20.
Commonly use structure with tradition to compare, the sewing machine automatic feeding in the present invention, can material strip pull assembly 40,
Under the integrating operation of cutting assembly 50 and control circuit 60, need not the most manually wear material strip 20 every time after cutting band, have
Effect promotes the processing production capacity of sewing machine operation, and under the restriction, guiding of material strip towing assembly 40, effectively prevents material
Band 20 torsion, is greatly reduced the processing flaw of sewing operation, is especially suitably applied the sewing processing of successional webbing
Operation.
The foregoing is only presently preferred embodiments of the present invention, non-the scope of the claims the most i.e. limiting the present invention, therefore such as
Simple modification and equivalent structure that utilization description of the invention and graphic content are done change, and all should in like manner be contained in the present invention
The scope of the claims in.
Claims (10)
1. a sewing machine automatic feeding, is provided at one and has at the sewing machine periphery of a cloth pressing foot, with for one even
The material strip of continuous shape wears and material strip is sent into this sewing machine, it is characterised in that this automatic feeding includes:
One bracket, is installed on this sewing machine and is provided with a swing arm；
One material strip towing assembly, device is on this bracket and has a material-feeding rolling wheels and material strip compacting wheel, this material
Ratch with pressure is located in this swing arm, and this material strip compacting wheel shaft is set along in this bracket one end with this material-feeding rolling wheels
Upper phase para-position is in the position by both sides, path of this material strip, and separately this bracket is provided with one first pneumatic cylinder assembly,
In order to drive this swing arm to swing；
One cutting assembly, has one first cut-off knife and one second cut-off knife corresponding intrument at this material-feeding rolling wheels and this material
The lower section of ratch with pressure, and same phase para-position is in the both sides by path of this material strip, is separately provided with in this bracket
One for driving the second driving assembly of this first cut-off knife and this second cut-off knife relative displacement；
One control circuit, is connected to a knee switch, this first pneumatic cylinder assembly, this second driving assembly, with
For in the case of this material strip cut off by needs, start this knee switch and control this through this control circuit and second drive
Dynamic assembly activates this second cut-off knife when cutting out this material strip, it is possible to this first pneumatic cylinder assembly of Synchronization Control swings this pendulum
Arm moves this material strip compacting wheel, does not cuts out place with this material strip the most sandwiched with this material-feeding rolling wheels, makes this material strip
Maintain and former wear position, be used for feeding next time.
Sewing machine automatic feeding the most according to claim 1, it is characterised in that: this control circuit more connects to be had
One foot switch and one, with the tension adjustment assembly worn for this material strip, for when sewing, starts this and rides
Switch and pass through this control circuit to move this material strip compacting wheel so that it is with this material-feeding rolling wheels in the action shape opened
State, carries out tension force control in order to this tension adjustment assembly to this material strip.
Sewing machine automatic feeding the most according to claim 1, it is characterised in that: this control circuit more connects to be had
One foot switch, this material strip towing assembly is provided with the first driving assembly that this material-feeding rolling wheels of a driving rotates, and
This control circuit controls setting and the signal of this foot switch according to what acquiescence was preset, controls this first driving group
Whether part, this second driving assembly operate.
Sewing machine automatic feeding the most according to claim 3, it is characterised in that: this first drive assembly be for
One motor.
Sewing machine automatic feeding the most according to claim 1, it is characterised in that: this sewing machine self-feeding fills
Putting is to be further provided with the most horizontal support stretching in above this sewing machine place, is provided with one for accepting in this support
Material strip support wheel, and one for drive this support wheel rotate the 3rd driving assembly, the 3rd drive assembly and with
This control circuit connects.
Sewing machine automatic feeding the most according to claim 5, it is characterised in that: the 3rd drive assembly be for
One motor.
Sewing machine automatic feeding the most according to claim 1, it is characterised in that: this bracket has further included one and has fed
Hopper, this feeding hopper is relatively located at below this first and second cut-off knife place and has one and tilt to towards this cloth pressing foot direction
Material strip guide hole, in order to be connected this material strip.
Sewing machine automatic feeding the most according to claim 7, it is characterised in that: this bracket has further included one and has blown
Trachea group, in order to blow this material strip, makes to allow the front end of this material strip enter this cloth pressing foot under airflow function
Lower section.
Sewing machine automatic feeding the most according to claim 1, it is characterised in that: this second drive assembly be for
One pneumatic cylinder assembly, in order to drive this second cut-off knife to swing, makes this second cut-off knife jointly cut off with this first cut-off knife
This material strip.
10. according to the sewing machine automatic feeding described in claim 1 or 2 or 3, it is characterised in that: this control circuit
It is that the control panel at this sewing machine front is located in electrical connection one relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510187084.9A CN105986371B (en) | 2015-04-20 | 2015-04-20 | Sewing machine automatic feeding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510187084.9A CN105986371B (en) | 2015-04-20 | 2015-04-20 | Sewing machine automatic feeding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105986371A true CN105986371A (en) | 2016-10-05 |
| CN105986371B CN105986371B (en) | 2018-07-24 |
Family
ID=57039546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510187084.9A Active CN105986371B (en) | 2015-04-20 | 2015-04-20 | Sewing machine automatic feeding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105986371B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0491999A1 (en) * | 1990-12-28 | 1992-07-01 | Kun-Jung Lee | A sewing machine pressing leg and an adjusting device therefor |
| CN102134790A (en) * | 2011-03-19 | 2011-07-27 | 台州拓卡奔马机电科技有限公司 | Automatic feeding system for placket knitting machine |
| CN102162178A (en) * | 2011-03-29 | 2011-08-24 | 厦门市宏迪机电设备有限公司 | Automatic shearing and feeding machine of hook&loop |
| CN102433692A (en) * | 2011-08-10 | 2012-05-02 | 新杰克缝纫机股份有限公司 | Automatic feeding device of sewing machine |
| CN102493131A (en) * | 2011-12-03 | 2012-06-13 | 宁波舒普机电科技有限公司 | Feeding device for automatic band nailing machine |
| CN203451791U (en) * | 2013-08-30 | 2014-02-26 | 中捷缝纫机股份有限公司 | Automatic feeding device of flat-end buttonhole lockstitching machine |
| CN204608343U (en) * | 2015-04-20 | 2015-09-02 | 贺欣机械厂股份有限公司 | Sewing machines automatic feeding |
-
2015
- 2015-04-20 CN CN201510187084.9A patent/CN105986371B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0491999A1 (en) * | 1990-12-28 | 1992-07-01 | Kun-Jung Lee | A sewing machine pressing leg and an adjusting device therefor |
| CN102134790A (en) * | 2011-03-19 | 2011-07-27 | 台州拓卡奔马机电科技有限公司 | Automatic feeding system for placket knitting machine |
| CN102162178A (en) * | 2011-03-29 | 2011-08-24 | 厦门市宏迪机电设备有限公司 | Automatic shearing and feeding machine of hook&loop |
| CN102433692A (en) * | 2011-08-10 | 2012-05-02 | 新杰克缝纫机股份有限公司 | Automatic feeding device of sewing machine |
| CN102493131A (en) * | 2011-12-03 | 2012-06-13 | 宁波舒普机电科技有限公司 | Feeding device for automatic band nailing machine |
| CN203451791U (en) * | 2013-08-30 | 2014-02-26 | 中捷缝纫机股份有限公司 | Automatic feeding device of flat-end buttonhole lockstitching machine |
| CN204608343U (en) * | 2015-04-20 | 2015-09-02 | 贺欣机械厂股份有限公司 | Sewing machines automatic feeding |
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| Publication number | Publication date |
|---|---|
| CN105986371B (en) | 2018-07-24 |
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