CN106436059A - Sewing material gather removing mechanism, automatic edge alignment device of sewing machine and sewing machine - Google Patents
Sewing material gather removing mechanism, automatic edge alignment device of sewing machine and sewing machine Download PDFInfo
- Publication number
- CN106436059A CN106436059A CN201611236750.4A CN201611236750A CN106436059A CN 106436059 A CN106436059 A CN 106436059A CN 201611236750 A CN201611236750 A CN 201611236750A CN 106436059 A CN106436059 A CN 106436059A
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- China
- Prior art keywords
- sewing
- driving wheel
- drive wheel
- side drive
- guide
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Classifications
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B35/00—Work-feeding or -handling elements not otherwise provided for
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a sewing material gather removing mechanism. The sewing material gather removing mechanism comprises an upper-side driving wheel for driving an upper-layer sewing material to move in the feeding direction of a sewing machine and further comprises a gather removing guide portion arranged in the feeding direction and extending in the feeding direction. The gather removing guide portion is located on the rear side of the upper-side driving wheel in the feeding direction of forward movement of the upper-layer sewing material, the rear end, away from the upper-side driving wheel, of the gather removing guide portion is upwards and obliquely arranged, and the rear end of the gather removing guide portion is higher than lower end of the upper-side driving wheel. The gather removing guide portion is arranged on the rear side of the upper-side driving wheel and used for removing gathers or protrusions formed during sewing material feeding so as to achieve a good sewing material feeding effect and a sewing material ridge passing effect, and the appearance of sewing stitches is ensured. In addition, the gather removing guide portion is arranged on the rear side of the upper-side driving wheel, and combination between the gather removing guide portion and an upper-side driving wheel assembly can be promoted, so that an automatic edge alignment device of the sewing machine and a sewing machine sewing material feeding device re simple and compact, and reduction of the cost of the sewing machine is promoted.
Description
Technical field
The present invention relates to a kind of sewing machine, more particularly to a kind of sewing Qu Zhe mechanism, sewing machine automatic edge-adjusting device and
Sewing machine.
Background technology
Sewing machine if sewing has fold or projection, will result in sewing feeding during the double-deck sewing of sewing
When ran into Kan Chu can interim card, so as to cause sewing thread trace unsightly.Existing sewing machine automatic edge-adjusting device is not fully
The impact of consideration this respect, therefore interim card treatment effect when feeding to cloth bad；Or, existing sewing machine automatic edge-adjusting
Device installs an absolute construction additional and has sloping guide plate, but, its structure is complex, high cost.
Content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of structure simplify, low cost
Sewing Qu Zhe mechanism.
For achieving the above object, the present invention provides a kind of sewing Qu Zhe mechanism, including for driving upper strata sewing along vertical
In the upper side drive wheel that the direction of sewing machine feedstock direction is moved, also include to be arranged on feedstock direction and prolong along feedstock direction
That stretched removes pleat guide part；Along upper strata sewing move forward feedstock direction, described go pleat guide part be located at upper side drive wheel after
Side, described goes pleat guide part to be inclined upwardly away from the rear end of upper side drive wheel to arrange and go to the rear end of pleat guide part higher than upside
The lower end of driving wheel.
Preferably, described pleat guide part is gone to be flushed with the lower end of upper side drive wheel up and down near the front end of upper side drive wheel.
Further, also include the driving wheel fixing axle axially extending along feedstock direction and consolidate positioned at driving wheel respectively
Driving wheel fixed plate at dead axle two ends, the upper side drive wheel fixed cover is in driving wheel fixing axle, and the driving wheel is fixed
The two ends of axle are rotatably supported in driving wheel fixed plate.
Preferably, the rear end of the upper side drive wheel is provided with chamfered section, described go pleat guide part for the part of chamfered section outside
Surface.
Further, also include the guide positioned at upper side drive wheel rear side, the guide and upper side drive wheel or
Driving wheel fixing axle is mutually fixed, with tapered guide portion on the guide, the external diameter in the guide portion from front to back by
Decrescence little, described go pleat guide part for guide portion partial outer face.
Further, the guide positioned at upper side drive wheel rear side, the guide and driving wheel fixed plate are also included
Mutually fix, with the guide portion for inclining rearwardly and upwardly on the guide, described go pleat guide part for guide portion outer surface.
The lower end for being preferably located at the driving wheel fixed plate of driving wheel fixing axle rear end is provided with inclined upward backwards and prolongs
Stretch or inclined downward extends forward guide portion, the guide portion is integrated part with driving wheel fixed plate, described remove pleat guide part
Outer surface for guide portion.
The application also provides a kind of sewing machine automatic edge-adjusting device, including sewing Qu Zhe mechanism as above, Yi Jiyong
In driving lower floor sewing along the lower side drive wheel for moving perpendicular to the direction of sewing machine feedstock direction, the upper side drive wheel and under
Side drive wheel is all rotatable and is oppositely arranged up and down.
The application provides a kind of sewing machine again, is provided with sewing machine automatic edge-adjusting as above dress on the sewing machine
Put.
As described above, sewing Qu Zhe mechanism according to the present invention, sewing machine automatic edge-adjusting device and sewing machine, with
Lower beneficial effect：
The application is arranged in the rear side of upper side drive wheel and removes pleat guide part, with remove sewing in feeding the fold that occurs or
, there is Caton phenomenon during so as to eliminating sewing feeding in projection, crosses bank effect to reach preferable sewing feeding effect and sewing, protects
The aesthetics of card sewing thread trace；In addition, by the rear side for going pleat guide part to be arranged on upper side drive wheel, can be easy to remove pleat guide part
Combine with upside drive wheel assemblies so that sewing machine automatic edge-adjusting device and sewing machine sewing feed arrangement are simpler tight
Gather, advantageously reduce the cost of sewing machine.
Description of the drawings
Fig. 1 is the structural representation of sewing machine sewing feed arrangement in the application.
Fig. 2 to Fig. 6 forms the different embodiments of structure for removing pleat guide part in the application.
Component label instructions
1 upper strata sewing
2 lower floor's sewings
Side drive wheel on 3
31 chamfered section
4 remove pleat guide part
5 driving wheel fixing axles
6 driving wheel fixed plates
7 guides
8 guide portions
9 securing members
10 presser feets
11 feeding teeth
12 feeding feet
13 times side drive wheel
14 separating plates
15 upside detector units
16 downside detector units
17 sensor fixation plates
18 needle plates
Specific embodiment
Hereinafter embodiments of the present invention are illustrated by particular specific embodiment, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages of the present invention and effect easily.
It should be clear that structure depicted in this specification accompanying drawing, ratio, size etc., all only in order to coordinate disclosed in description
Content, so that those skilled in the art understands and reads, is not limited to the enforceable qualificationss of the present invention, therefore does not have
Technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, do not affecting institute's energy of the present invention
Under effect of generation and the purpose that can reach, still all should fall in the range of disclosed technology contents can be covered.
Meanwhile, in this specification cited such as " on ", D score, "left", "right", the term of " centre " and " " etc., be merely convenient to
Narration understands, and is not used to the enforceable scope of the restriction present invention, being altered or modified for its relativeness, changes skill in no essence
Hold in art, when being also considered as the enforceable category of the present invention.
As shown in figure 1, the application provides a kind of sewing Qu Zhe mechanism, including for driving upper strata sewing 1 along perpendicular to seam
Thread machine feedstock direction direction movement upper side drive wheel 3, also include to be arranged on feedstock direction and extend along feedstock direction
Remove pleat guide part 4, the upper side drive wheel 3 and go the part that pleat guide part 4 is all in the drive wheel assemblies of upside；For ease of retouching
State, sewing machine feedstock direction is defined as fore-and-aft direction, and when sewing, sewing is forward movement.Further, along upper strata sewing 1
The feedstock direction of forward movement, the rear side for going pleat guide part 4 to be located at upper side drive wheel 3, described removes pleat guide part 4 away from upper
The rear end of side drive wheel 3 is inclined upwardly and arranges and go to the rear end of pleat guide part 4 higher than the lower end of upper side drive wheel 3.
Sewing machine is in operation process, and sewing machine sewing feed arrangement drives sewing forward movement, therefore sewing is successively from going
The lower section of the lower section of pleat guide part 4 and upper side drive wheel 3 passes through；When fold or projection occurs when feeding forward in sewing, then
Fold or projection are gradually smoothed after contacting with pleat guide part 4 is removed so that aptychus on the sewing of 3 lower section of side drive wheel in entrance
Wrinkle or raised, therefore the application can effectively remove fold or the projection that sewing occurs in feeding, during so as to eliminating sewing feeding
There is Caton phenomenon, bank effect being crossed to reach preferable sewing feeding effect and sewing, sewing feeding is more steady, it is ensured that sewing
The aesthetics of stitching.In addition, the part that pleat guide part 4 will be gone to be set in the drive wheel assemblies of upside, can make sewing machine automatic
Edge-adjusting device and sewing machine sewing feed arrangement are simpler compact, advantageously reduce the cost of sewing machine.Preferably, described go
Pleat guide part 4 is flushed with the lower end of upper side drive wheel 3 up and down near the front end of upper side drive wheel 3, therefore, can will remove pleat guide part
4 front end is extended forwardly at the posterior end of side drive wheel 3.
Further, as shown in Figures 2 to 6, the sewing Qu Zhe mechanism also includes axially extending before and after feedstock direction
Driving wheel fixing axle 5 and the driving wheel fixed plate 6 being located at 5 rear and front end of driving wheel fixing axle respectively, the upside is driven
3 fixed cover of driving wheel is in driving wheel fixing axle 5, and the rear and front end of the driving wheel fixing axle 5 is rotatably supported at driving wheel
In fixed plate 6.
Several preferred embodiments for going pleat guide part 4 to form structure presented below.
Embodiment one as shown in Fig. 2 the rear end of the upper side drive wheel 3 be provided with along feedstock direction before and after extend chamfering
Portion 31, the mode of chamfered section 31 and size are not fixed, and the outer surface of 31 lower end of chamfered section removes pleat guide part 4, plays and lead for described
Material is acted on, and pleat guide part 4 of dieing is the partial outer face of chamfered section 31.In the embodiment, pleat guide part 4 will be gone to drive with upside
Driving wheel 3 becomes one, both are reduced to a guide cam structure, more reduces production cost.
Embodiment two as shown in figure 3, the rear side of the upper side drive wheel 3 is provided with guide 7, the guide 7 with upper
Side drive wheel 3 or driving wheel fixing axle 5 are mutually fixed, therefore guide 7 is rotated with upper side drive wheel 3；Have on the guide 7
The guide portion 8 for having a circle tapered and extending before and after feedstock direction, the external diameter in the guide portion 8 is gradually reduced from front to back,
The outer surface of 8 lower end of guide portion removes pleat guide part 4, plays guide effect for described, and pleat guide part 4 of dieing is the portion in guide portion 8
Exceptionally surface.
Embodiment three as shown in figure 4, the rear side of the upper side drive wheel 3 is provided with guide 7, the guide 7 with rear
The driving wheel fixed plate 6 of side is mutually fixed by securing members 9 such as screws, therefore guide 7 is not rotated with upper side drive wheel 3, and
Coordinate for gap between the front end of guide 7 and upper side drive wheel 3, there is on the guide 7 inclination rearwardly and upwardly, be in slope
The guide portion 8 of shape, the outer surface in guide portion 8 removes pleat guide part 4, plays guide effect for described, and pleat guide part 4 of dieing is guide
The outer surface in portion 8.
Example IV is as shown in figure 5, be provided with court positioned at the lower end of the driving wheel fixed plate 6 of 5 rear end of driving wheel fixing axle
Front lower place inclines the guide portion 8 for extending, therefore guide portion 8 is also in ramped shaped, and guide portion 8 is not rotated with upper side drive wheel 3, and
Coordinate for gap between the front end in guide portion 8 and upper side drive wheel 3, the guide portion 8 is integrated part with driving wheel fixed plate 6,
Described go pleat guide part 4 for guide portion 8 outer surface.
Embodiment five is as shown in fig. 6, be provided with court positioned at the lower end of the driving wheel fixed plate 6 of 5 rear end of driving wheel fixing axle
Back upper place inclines the guide portion 8 for extending, therefore guide portion 8 is in also ramped shaped, and the guide portion 8 is integrated with driving wheel fixed plate 6
Part, guide portion 8 is not rotated with upper side drive wheel 3, described go pleat guide part 4 for guide portion 8 outer surface.
The application also provides a kind of sewing machine, is configured with sewing machine sewing feed arrangement and sewing machine automatic edge-adjusting device,
Sewing machine sewing feed arrangement is used for driving upper strata sewing 1 and lower floor's sewing 2 to move forward, and sewing machine automatic edge-adjusting device is used for
Rear by the edge automatic aligning of the edge of upper strata sewing 1 and lower floor's sewing 2 and positioned at sewing machine sewing feed arrangement.Such as
Shown in Fig. 1, the sewing machine sewing feed arrangement includes to configure presser feet 10, the feeding tooth 11, Yi Jijin in 18 upper side of needle plate
To foot 12, the feeding tooth 11 and feeding foot 12 pump and front-rear reciprocation movement, therefore feeding tooth 11 and feeding foot
12 movement locus are all oval.The feeding tooth 11 is configured in the lower section of needle plate 18, feeds the lower feeding flank of tooth of 11 upper end of tooth
Expose from needle plate 18 upwards and contact with lower floor sewing 2, carry out the feed motion of lower floor's sewing 2；The feeding foot 12 is joined
Put in the top of presser feet 10, the upper feeding flank of tooth for feeding 12 lower end of foot is exposed downwards and connected with upper strata sewing 1 from presser feet 10
Touch, carry out the feed motion of upper strata sewing 1.
As shown in figure 1, the sewing machine automatic edge-adjusting device include upside drive wheel assemblies with upper side drive wheel 3,
Downside drive wheel assemblies, separating plate 14, upside detector unit 15 and downside detector unit 16 with lower side drive wheel 13；Described
Upper side drive wheel 3 and lower side drive wheel are arranged about 13；The separating plate 14 be located at upper side drive wheel 3 and lower side drive wheel 13 it
Between, for separating upper strata sewing 1 at sewing machine automatic edge-adjusting device with lower floor sewing 2, therefore upper strata sewing 1 is sandwiched in upside
Between driving wheel 3 and separating plate 14, lower floor's sewing 2 is sandwiched between lower side drive wheel 13 and separating plate 14.The upside drives
Wheel assembly includes sewing Qu Zhe mechanism as above, therefore has in the drive wheel assemblies of upside and remove pleat guide part 4, in addition,
Upside drive wheel assemblies also have upside driver element and upside lifting unit, and the upside driver element is used for driving upside to drive
Driving wheel 3 is rotated around the centrage for extending in front and back, to drive upper strata sewing 1 to move left and right；The upside lifting unit is used for driving
Move in upper side drive wheel 3 or move down, make side drive wheel 3 away from or be close to separating plate 14.The downside drive wheel assemblies are also wrapped
Downside driver element and downside lifting unit is included, the downside driver element is used for driving lower side drive wheel 13 to prolong around in front and back
The centrage rotation that stretches, to drive lower floor's sewing 2 to move left and right；The downside lifting unit is used for driving lower side drive wheel 13
Moving or move down, lower side drive wheel 13 is made close to or away from separating plate 14.Therefore, the sewing machine automatic edge-adjusting device that the application is related to
By moving left and right for each self-driven upper strata sewing 1 of upside drive wheel assemblies and downside drive wheel assemblies and lower floor's sewing 2, so as to
Realize the automatic edge-adjusting of upper strata sewing 1 and lower floor's sewing 2.More preferably, upper side drive wheel 3 is contacted with upper strata sewing 1 face, with
And the face that lower side drive wheel 13 is contacted with lower floor sewing 2 is all the flank of tooth, improve and the contact force between sewing, so as to improve band
The reliability of dynamic sewing movement.
Further, in above-mentioned sewing machine automatic edge-adjusting device, upside detector unit 15 is configured in feeding foot 12 and upside
Between driving wheel 3, for detecting whether upper strata sewing 1 moves to its assigned position, and result is inputed to the control of sewing machine
Unit；Downside detector unit 16 is configured between feeding tooth 11 and lower side drive wheel 13, for detecting whether lower floor's sewing 2 moves
To its assigned position, and result is inputed to the control unit of sewing machine.Described control unit is based on 15 He of upside detector unit
The testing result of downside detector unit 16, is controlled to each driver element, executes corresponding opposite side operation, so that upper strata sewing
1 and lower floor's sewing 2 be exactly in the position of respective regulation, improve the accuracy of automatic edge-adjusting.In the present embodiment, as Fig. 1 institute
Show, the upside detector unit 15 and downside detector unit 16 are installed admittedly by two pieces of sensor fixation plates being oppositely arranged in front and back 17
Fixed.
During sewing, feeding foot 12 and feeding tooth 11 coordinate presser feet 10 to drive upper strata sewing 1 and lower floor's sewing 2 respectively along entering
The forward movement of material direction, upper side drive wheel 3 and lower side drive wheel 13 drive upper strata to stitch under the driving of respective driver element respectively
Material 1 and lower floor's sewing 2 are moved left and right along the direction for being orthogonal to feedstock direction, so that upper strata sewing 1 and lower floor's sewing 2 enter
Row opposite side is sewed, and effectively removes, by removing pleat guide part 4, fold or the projection that sewing occurs in feeding, substantially increases seam
Thread quality.
In sum, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
Above-described embodiment only principle of the illustrative present invention and its effect, not for the restriction present invention.Any ripe
The personage for knowing this technology all can carry out modifications and changes without prejudice under the spirit and the scope of the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit such as
All equivalent modifications for becoming or change, must be covered by the claim of the present invention.
Claims (9)
1. a kind of sewing Qu Zhe mechanism, including for driving upper strata sewing (1) along moving perpendicular to the direction of sewing machine feedstock direction
Dynamic upper side drive wheel (3), it is characterised in that：Also include that the pleat that goes for being arranged on feedstock direction and extending along feedstock direction is led
To portion (4)；Along the feedstock direction that upper strata sewing (1) is moved forward, described pleat guide part (4) is gone to be located at upper side drive wheel (3)
Rear side, described go pleat guide part (4) away from upper side drive wheel (3) rear end be inclined upwardly setting and go after pleat guide part (4)
End is higher than the lower end of upper side drive wheel (3).
2. sewing Qu Zhe mechanism according to claim 1, it is characterised in that：Described go pleat guide part (4) near upside drive
The front end of driving wheel (3) is flushed up and down with the lower end of upper side drive wheel (3).
3. sewing Qu Zhe mechanism according to claim 1 and 2, it is characterised in that：Also include axially extending along feedstock direction
Driving wheel fixing axle (5) and respectively be located at driving wheel fixing axle (5) two ends at driving wheel fixed plate (6), the upside
Driving wheel (3) fixed cover is in driving wheel fixing axle (5), and the two ends of driving wheel fixing axle (5) are rotatably supported at drive
In driving wheel fixed plate (6).
4. sewing Qu Zhe mechanism according to claim 3, it is characterised in that：The rear end of upper side drive wheel (3) is provided with
Chamfered section (31), described go pleat guide part (4) for chamfered section (31) partial outer face.
5. sewing Qu Zhe mechanism according to claim 3, it is characterised in that：Also include positioned at upper side drive wheel (3) rear
The guide (7) of side, guide (7) are mutually fixed with upper side drive wheel (3) or driving wheel fixing axle (5), the guide
(7) upper have tapered guide portion (8), and the external diameter of guide portion (8) is gradually reduced from front to back, described removes pleat guide part
(4) it is the partial outer face in guide portion (8).
6. sewing Qu Zhe mechanism according to claim 3, it is characterised in that：Also include positioned at upper side drive wheel (3) rear
The guide (7) of side, guide (7) are mutually fixed with driving wheel fixed plate (6), have go up on described guide (7) backward
Side incline guide portion (8), described go pleat guide part (4) for guide portion (8) outer surface.
7. sewing Qu Zhe mechanism according to claim 3, it is characterised in that：Positioned at driving wheel fixing axle (5) rear end
The lower end of driving wheel fixed plate (6) is provided with the guide portion (8) that inclined upward extends or inclined downward extends forward backwards, described
Guide portion (8) and driving wheel fixed plate (6) are integrated part, described remove pleat guide part (4) for the outer surface in guide portion (8).
8. a kind of sewing machine automatic edge-adjusting device, it is characterised in that：Pleat machine is removed including the sewing described in any one of claim 1-7
Structure and the lower side drive wheel (13) for driving lower floor's sewing (2) edge to move perpendicular to the direction of sewing machine feedstock direction, institute
State side drive wheel (3) and lower side drive wheel (13) all rotatable and be oppositely arranged up and down.
9. a kind of sewing machine, it is characterised in that：The sewing machine automatic edge-adjusting dress being provided with the sewing machine described in claim 8
Put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611236750.4A CN106436059A (en) | 2016-12-28 | 2016-12-28 | Sewing material gather removing mechanism, automatic edge alignment device of sewing machine and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611236750.4A CN106436059A (en) | 2016-12-28 | 2016-12-28 | Sewing material gather removing mechanism, automatic edge alignment device of sewing machine and sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106436059A true CN106436059A (en) | 2017-02-22 |
Family
ID=58215689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611236750.4A Pending CN106436059A (en) | 2016-12-28 | 2016-12-28 | Sewing material gather removing mechanism, automatic edge alignment device of sewing machine and sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106436059A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108914405A (en) * | 2018-07-26 | 2018-11-30 | 杰克缝纫机股份有限公司 | A kind of sewing machine and its edge-adjusting device |
| CN109594218A (en) * | 2018-12-11 | 2019-04-09 | 杰克缝纫机股份有限公司 | A kind of sewing machine and its double-layer cloth alignment means |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4757773A (en) * | 1986-11-15 | 1988-07-19 | Brother Kogyo Kabushiki Kaisha | Programmed pattern aligning device for a sewing machine |
| CN101864644A (en) * | 2009-04-14 | 2010-10-20 | Juki株式会社 | Upward and downward feeding sewing machine |
| CN204342092U (en) * | 2014-11-04 | 2015-05-20 | 浙江大港印染有限公司 | A kind of cloth transmits expanding unit |
| CN204644694U (en) * | 2015-03-10 | 2015-09-16 | 德清县伊得利丝绸有限公司 | Cloth flattening apparatus |
-
2016
- 2016-12-28 CN CN201611236750.4A patent/CN106436059A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4757773A (en) * | 1986-11-15 | 1988-07-19 | Brother Kogyo Kabushiki Kaisha | Programmed pattern aligning device for a sewing machine |
| CN101864644A (en) * | 2009-04-14 | 2010-10-20 | Juki株式会社 | Upward and downward feeding sewing machine |
| CN204342092U (en) * | 2014-11-04 | 2015-05-20 | 浙江大港印染有限公司 | A kind of cloth transmits expanding unit |
| CN204644694U (en) * | 2015-03-10 | 2015-09-16 | 德清县伊得利丝绸有限公司 | Cloth flattening apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108914405A (en) * | 2018-07-26 | 2018-11-30 | 杰克缝纫机股份有限公司 | A kind of sewing machine and its edge-adjusting device |
| CN109594218A (en) * | 2018-12-11 | 2019-04-09 | 杰克缝纫机股份有限公司 | A kind of sewing machine and its double-layer cloth alignment means |
| CN109594218B (en) * | 2018-12-11 | 2021-02-02 | 杰克缝纫机股份有限公司 | Sewing machine and double-layer cloth aligning device thereof |
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Application publication date: 20170222 |
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