CN103726241B - Column Sewing machine with needle feed thread cutting mechanism - Google Patents
Column Sewing machine with needle feed thread cutting mechanism Download PDFInfo
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- CN103726241B CN103726241B CN201310734120.XA CN201310734120A CN103726241B CN 103726241 B CN103726241 B CN 103726241B CN 201310734120 A CN201310734120 A CN 201310734120A CN 103726241 B CN103726241 B CN 103726241B
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- slide block
- fork
- sewing machine
- chute
- cutting blade
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Abstract
The present invention relates to sewing machine.A kind of column Sewing machine with needle feed thread cutting mechanism, including cutting blade, drives the connecting rod of cutting blade, the trimming cam of drive link and the ledger-plate coordinated with cutting blade.The invention provides a kind of column Sewing machine with needle feed thread cutting mechanism, solve the problem that existing column Sewing machine with needle feed can not carry out automatic shearing.
Description
Technical field
The present invention relates to sewing machine, particularly relate to a kind of column Sewing machine with needle feed thread cutting mechanism.
Background technology
The machine of threading is to use one or more sewing thread, forms one or more stitchings on sewing, makes the machine that one or more layers sewing interweaves or unites by a seam.China Patent No. be 98122522.5, publication date be on June 23rd, 1999, entitled " clothes limit turns limit sewing machine automatically " patent document in disclose a kind of sewing machine.There is the deficiency needing artificial trimming in existing column sewing machine.
Summary of the invention
The invention provides a kind of column Sewing machine with needle feed thread cutting mechanism, solve the problem that existing column Sewing machine with needle feed can not carry out automatic shearing.
More than technical problem is that and solved by following technical proposal: a kind of column Sewing machine with needle feed thread cutting mechanism, including cutting blade, drive the connecting rod of cutting blade, the trimming cam of drive link and the ledger-plate coordinated with cutting blade.The present invention is arranged on below head base plate during use, during trimming, cutting blade and ledger-plate are not in separated position, upper thread and inner line (hereafter referred to collectively as sewing thread) pass between slave blade and ledger-plate, when needing trimming, reciprocating by trimming actuated by cams connecting rod, connecting rod drives cutting blade relative to ledger-plate folding, sewing thread is cut off by ledger-plate and cutting blade, after secant completes, trimming cam stops drive link motion, and cutting blade stops at the place not interfering sewing machine to carry out sewing operation.
Present invention additionally comprises clutch and slide block, described connecting rod one end and described cutting blade link together, the other end and described slide block link together, described trimming cam is cylindrical cam, the side face of described trimming cam is provided with chute, described slide block can be linked together to clutch with described chute by described clutch, described column Sewing machine with needle feed is provided with line shaft, and described trimming cam is driven by described line shaft.Can realize being installed in sewing machine the present invention in the case of the apparent size not increasing existing column sewing machine.During sewing machine work, line shaft drives trimming cam rotation, if not carrying out trimming work, under the effect of clutch, slide block is positioned at the outside of chute, connecting rod will not move together in company with trimming cam；When wanting trimming, under the effect of clutch, slide block be positioned at chute, connecting rod moves together in company with trimming cam, drives cutting blade to move back and forth, thus realize trimming during link motion.
As preferably, described clutch include mounting seat, fork, electric magnet and back-moving spring, one end of described fork be provided with fork hinge and hinged with described mounting seat by fork hinge, another is with together with described rod hinge connection；Both described back-moving spring and electric magnet, one be used for driving fork to move axially along fork hinge and described slide block is inserted in described chute, another one makes described slide block extract in described chute for driving fork to move axially along fork hinge.Simple in construction.
As preferably, described electric magnet is used for driving fork to move axially along fork hinge and described slide block is inserted in described chute, and described back-moving spring is used for driving fork to move axially along fork hinge and described slide block is extracted in described chute.If electric magnet lost efficacy time (the most not producing magnetic force), trimming cam and connecting rod are in released state, the i.e. present invention will not carry out trimming action, otherwise then galvanic electricity sector-meeting is a kind of in motion, and therefore the technical program is prevented from affecting when electric magnet lost efficacy the suture operation of sewing machine.
As preferably, described fork is provided with the first frictional damping face, described installing rack is provided with the second frictional damping face, together with first frictional damping face described in when slide block is in released state with described chute is connected to the second frictional damping face, described in when slide block is positioned at described chute, the first frictional damping face and the second frictional damping face separate.Existing clutch controls the method for separation point position, by controlling what the separation moment realized, the moment of the position i.e. moving at cutting blade not interfere sewing machine to carry out sewing operation makes connecting rod separate with trimming cam, but the uncertainty of the rotating speed due to line shaft, the resistance of each moving part can be along with using the change of time and the impact of the factors such as change, the motional inertia of connecting rod and cutting blade is among change, therefore galvanic electricity sheet stop position can be produced inaccurate and interfere the phenomenon of the sewing operation of sewing machine to produce, frictional damping face is set and can play the effect accurately stopped by cutting blade and anti-vibration is effective.
As preferably, the axis of described trimming cam is horizontally extending, and described trimming cam is positioned at the top of described fork, and described first frictional damping face is arranged at the downside of described fork.This technical scheme enables to the weight of fork and also functions to promote the effect of braking effect, improves reliability during braking, and braking reliability improves, the good reliability when present invention works.
Present invention additionally comprises knife rest and the movable arbor vertically extended, movable arbor is rotationally connected with described knife rest, described ledger-plate is fixed in the upper end of described knife rest, described galvanic electricity sheet and ledger-plate are distributed in the horizontal direction, described ledger-plate is provided with stationary knife blade, described stationary knife blade vertically extends, the lower end of described movable arbor connects the crank driving movable arbor to rotate, one end of described crank and described connecting rod is hingedly connected together, the other end of described connecting rod is connected with described trimming cam, described cutting blade is fixed in the upper end of described movable arbor, described cutting blade is provided with " V " font moving knife blade.When carrying out trimming operation, cutting blade reciprocating rotation is driven by movable arbor, during cutting blade rotates, moving knife blade catches on sewing thread, sewing thread is drawn close towards stationary knife blade while sliding along moving knife blade, make the action that sewing thread is cut simultaneously and sawed by blade, be the most not only avoided that blade produces concentrated wear, but also sewing thread can be made reliably to be cut off.Connecting rod drives movable arbor to make ledger-plate remove to carry out tangent line by rotational action by crank, cutting blade can be realized in the case of link motion speed is less there is bigger trimming speed, thus reliability when can improve trimming further, when line shaft rotating speed is less, sewing thread reliably can also be cut off, the sewing machine allowing the invention to same different rotating speeds mates, thus improves the versatility of the present invention.
As preferably, described cutting blade is tulwar, and the outer peripheral edge of described cutting blade is provided with described moving knife blade, and the lower surface axial along movable arbor of described cutting blade is provided with described moving knife blade.Allow the invention to can the most entirely cut off sewing wire harness different to fan-out angle and angle of inclination.
As preferably, described slide block is provided with dop, and described chute includes the section of dodging and interferes section, and described interference section is provided with the flange matched and stop slide block to skid off from described interference section along the radial direction that described trimming cam is sliding with described dop." section of dodging " refers to that the cutting blade when slide block is positioned at this position of chute is positioned at the part of the position that will not interfere with sewing machine sewing operation." interference section " refers to that the cutting blade when slide block is positioned at this position of chute is positioned at the part of the position that can interfere sewing machine sewing operation.The all of part of existing chute is all open, slide block can skid off the optional position from chute, this structure makes clutch can produce cutting blade when controlling inaccurate and stops at the position interfering sewing machine sewing operation, in order to avoid the generation of interference then requires height to clutch control accuracy.The technical program enables to the clutch by any control accuracy when carrying out clutch for clutch control, cutting blade all without stopping at the position interfering sewing machine sewing operation, good reliability.
As preferably, described trimming cam side face is provided with slide block and imports hole, and described slide block imports the aperture area in hole and tapers into bottom from opening, described in the section of dodging be positioned at described slide block and import the bottom in hole.The required precision of relative position between slide block and chute can be reduced, improve convenience during making；Even if slide block produces a certain amount of displacement after separating and also is able to again close in chute, improve the anti-vibration ability of the present invention, and when sewing machine is certain to produce vibration and sewing during sewing work, slide block and chute are to separate.
The present invention has an advantage that and is capable of automatically cutting off of sewing thread, is effectively improved the work efficiency of sewing machine.
Accompanying drawing explanation
Fig. 1 is the split view of the embodiment of the present invention one.
Fig. 2 is the close-up schematic view in Fig. 1 at A.
Fig. 3 is the close-up schematic view in Fig. 1 at B.
Fig. 4 is the use view of the embodiment of the present invention one.
Fig. 5 is the schematic diagram of the local of the embodiment of the present invention two.
Fig. 6 is the enlarged diagram of the trimming cam in the embodiment of the present invention two.
nullIn figure: trimming cam mechanism 1、Trimming cam 11、Chute 111、The section of dodging 1111、Interfere section 1112、Flange 11121、Slide block imports hole 112、Cam shaft 12、Back-up ring 13、Clutch 2、Mounting seat 21、First frictional damping face 211、Fork 22、Second frictional damping face 221、Electric magnet 23、Fork hinge 24、Back-moving spring 25、Slide block 26、Dop 261、Suspension plate 27、Linkage 3、Connecting rod 31、Right connecting bolt 32、Left connecting bolt 33、Tool rest 4、Cutting blade 5、Moving knife blade 51、First moving knife blade 511、Second moving knife blade 512、The free end 5121 of the lower sword of the second moving knife blade、3rd moving knife blade 513、The free end 5131 of the lower sword of the 3rd moving knife blade、The upper surface 52 axial along movable arbor of cutting blade、Crank 53、Movable arbor 54、Ledger-plate 6、Stationary knife blade 61、Head base plate 7、Head of sewing machine 8.
Detailed description of the invention
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings.
Embodiment one, sees Fig. 1, and a kind of column Sewing machine with needle feed thread cutting mechanism, including trimming cam mechanism 1, clutch 2, linkage 3, tool rest 4, cutting blade 5 and ledger-plate 6.
Trimming cam mechanism 1 includes trimming cam 11, cam shaft 12 and back-up ring 13.Trimming cam 11 is cylindrical cam.The axis of trimming cam 31 is horizontally extending.The side face of trimming cam 11 is provided with chute 111.Cam shaft 12 is tubular structure.The method that trimming cam mechanism 1 is combined is: cam shaft 12 is located in trimming cam 11 and is fixed by back-up ring 13.
Clutch 2 includes mounting seat 21, fork 22, electric magnet 23, fork hinge 24 and back-moving spring 25.Fork 22 is the level of state.Fork 22 upper surface is provided with slide block 26.One end of fork 22 is hinged by fork hinge 24 and mounting seat 21.Electric magnet 23 is fixed on mounting seat 21 by suspension plate 27.Slide block 26 is positioned at the lower section of chute 111 trimming cam 11.Certainly slide block 26 can also be set directly on linkage 3.Electric magnet 23 is used for driving fork 22 to move axially upwards along fork hinge and make slide block 26 be inserted in chute 111 (namely electric magnet 23 electric and make slide block 26 slide in chute 111 when producing magnetic force).Back-moving spring 25 is used for driving fork 22 to move axially downwards along fork hinge and slide block 26 is extracted from chute 111.
Linkage 3 includes connecting rod 31, left connecting bolt 33 and right connecting bolt 32.Connecting rod 31 is universal bearing connecting rod.The right-hand member of connecting rod 31 is linked together by the other end of right connecting bolt 32 and fork 12.The left end of connecting rod 31 is linked together by one end of left connecting bolt 33 and crank 53.The other end of crank 53 and the lower end of movable arbor 54 are fixed together.Movable arbor 54 vertically extends.
Tool rest 4 is the rotation shuttle seat in column Sewing machine with needle feed.Rotation shuttle seat is existing structure.Movable arbor 54 is rotationally connected with tool rest 4.
Cutting blade 5 is fixed in the upper end of movable arbor 54.Cutting blade 5 is the level of state.Cutting blade 5 is tulwar.
Ledger-plate 6 is fixed in the upper end of tool rest 4.Ledger-plate 6 is in vertical state.Galvanic electricity sheet 6 and ledger-plate 5 are distributed in the horizontal direction.
Seeing Fig. 2, cutting blade 5 is provided with " V " font moving knife blade 51.Moving knife blade 51 has three.Article three, moving knife blade 51 is respectively the first moving knife blade the 511, second moving knife blade 512 and the 3rd moving knife blade 513.First moving knife blade 511 is arranged at the outer peripheral edge of conducting strip 5.3rd moving knife blade 513 and the second moving knife blade 512 are arranged on the lower surface axial along movable arbor of cutting blade 5.The free end 5121 of the lower sword of the second moving knife blade from the distance of the upper surface 52 axial along movable arbor of cutting blade more than the free end 5131 of the lower sword of the 3rd moving knife blade from the upper surface 52 axial along movable arbor of cutting blade.The versatility of the present invention can be improved further.
Seeing Fig. 3, ledger-plate 6 is provided with stationary knife blade 61.Stationary knife blade 61 vertically extends.
See Fig. 4 and combine Fig. 2 and Fig. 3, use makes, tool rest 4 is fixed on the downside of head base plate 7, mounting seat 21 is fixed on the downside of head base plate 7, line shaft in trimming cam 11 and sewing machine (is the lower axle in sewing machine in the present embodiment, figure does not draw) it is fixed together coaxially so that the present invention is integrally located at the lower section of head of sewing machine 8.Lower axle drives trimming cam 11 to rotate, during suture, under the effect of back-moving spring 25, slide block 26 is positioned at the outside of chute 111, thus cutting blade 5 remains static and by outer peripheral face towards in the way of ledger-plate 6 with ledger-plate 6 separately, sewing thread passes between ledger-plate 6 and cutting blade 5.When wanting trimming, power to electric magnet 23, electric magnet 23 produces magnetic force makes slide block 26 be inserted in chute 111, the rotation of trimming cam 11 is converted to the reciprocating translatory of connecting rod 31 by chute 111, connecting rod 31 drives movable arbor 52 reciprocating rotation by bent axle 51, movable arbor 52 drives cutting blade 5 to reset and swings, each stock (at least two strands) in sewing thread is all caught on and drives sewing thread close towards stationary knife blade 61 by moving knife blade 51, moving knife blade 51 and stationary knife blade 61 produce the effect cut and saw to sewing thread simultaneously, thus are cut off by sewing thread.After completing trimming action, by controlling the dead electricity moment of electric magnet 23 so that slide block 26 rests on the place not interfering suture operation with chute 111 after separating under the effect of back-moving spring 25.
Embodiment two, sees Fig. 5, with the difference of embodiment one is: fork 22 is provided with the first frictional damping face 221.First frictional damping face 221 is arranged at the downside of fork 22.Installing rack 21 is provided with the second frictional damping face 211.Slide block 26 is provided with dop 261 towards one end of chute diapire 1111.
Seeing Fig. 6, chute 111 includes the section of dodging 1111 and interferes section 1112.The notch end interfering section 1112 is provided with flange 11121.Trimming cam 11 side face is provided with the slide block tapered into bottom opening area from opening and imports hole 112.The section of dodging 1111 is positioned at slideway and imports the bottom in hole 112.
See Fig. 5 and Fig. 6, when slide block 26 is in released state with chute 111, under the effect that back-moving spring 25 and fork 22 are conducted oneself with dignity, together with the first frictional damping face 221 is connected to the second frictional damping face 211 so that slide block and chute 111 are separated rear fork 31 and can be stopped in time.When slide block 26 is inserted in chute 111, no matter whether slide block aligns with chute, when trimming cam 11 turn to slide block 26 be positioned at slide block import hole 112 in time, the effect sliding block importing hole 112 at slide block slides in the section of dodging 1111, when slide block 26 runs to interfere section 1112, under the cooperation of flange 11121 and dop 261, slide block 26 can not remove chute 111, during so that slide block 26 extracts chute, cutting blade is off in the position not interfering suture.
Claims (8)
- null1. a column Sewing machine with needle feed thread cutting mechanism，It is characterized in that，Including cutting blade、Drive the connecting rod of cutting blade、The trimming cam of drive link、The ledger-plate coordinated with cutting blade、Knife rest and the movable arbor vertically extended，Movable arbor is rotationally connected with described knife rest，Described ledger-plate is fixed in the upper end of described knife rest，Described cutting blade and ledger-plate are distributed in the horizontal direction，Described ledger-plate is provided with stationary knife blade，Described stationary knife blade vertically extends，The lower end of described movable arbor connects the crank driving movable arbor to rotate，One end of described crank and described connecting rod is hingedly connected together，The other end of described connecting rod is connected with described trimming cam，Described cutting blade is fixed in the upper end of described movable arbor，Described cutting blade is provided with " V " font moving knife blade，Described cutting blade is tulwar，Described moving knife blade includes the first moving knife blade、Second moving knife blade and the 3rd moving knife blade，Described first moving knife blade is arranged at the outer peripheral edge of described cutting blade，Described 3rd moving knife blade and the second moving knife blade are arranged on the lower surface axial along movable arbor of described cutting blade，Trimming cam is arranged in cam shaft，Cam shaft is tubular structure.
- Column Sewing machine with needle feed thread cutting mechanism the most according to claim 1, it is characterized in that, also include clutch and slide block, described connecting rod one end and described cutting blade link together, the other end and described slide block link together, described trimming cam is cylindrical cam, the side face of described trimming cam is provided with chute, described slide block can be linked together to clutch with described chute by described clutch, described column Sewing machine with needle feed is provided with line shaft, and described trimming cam is driven by described line shaft.
- Column Sewing machine with needle feed thread cutting mechanism the most according to claim 2, it is characterized in that, described clutch include mounting seat, fork, electric magnet and back-moving spring, one end of described fork be provided with fork hinge and by fork hinge is hinged with described mounting seat, the other end is with together with described rod hinge connection；Both described back-moving spring and electric magnet, one be used for driving fork to move axially along fork hinge and described slide block is inserted in described chute, another one makes described slide block extract in described chute for driving fork to move axially along fork hinge.
- Column Sewing machine with needle feed thread cutting mechanism the most according to claim 3, it is characterized in that, described electric magnet is used for driving fork to move axially along fork hinge and described slide block is inserted in described chute, and described back-moving spring is used for driving fork to move axially along fork hinge and described slide block is extracted in described chute.
- 5. according to the column Sewing machine with needle feed thread cutting mechanism described in claim 3 or 4, it is characterized in that, described fork is provided with the first frictional damping face, described installing rack is provided with the second frictional damping face, together with first frictional damping face described in when slide block is in released state with described chute is connected to the second frictional damping face, described in when slide block is positioned at described chute, the first frictional damping face and the second frictional damping face separate.
- Column Sewing machine with needle feed thread cutting mechanism the most according to claim 5, it is characterized in that, the axis of described trimming cam is horizontally extending, and described trimming cam is positioned at the top of described fork, and described first frictional damping face is arranged at the downside of described fork.
- 7. according to the column Sewing machine with needle feed thread cutting mechanism described in Claims 2 or 3 or 4, it is characterized in that, described slide block is provided with dop, described chute includes the section of dodging and interferes section, and described interference section is provided with the flange matched and stop slide block to skid off from described interference section along the radial direction of described trimming cam with described dop.
- Column Sewing machine with needle feed thread cutting mechanism the most according to claim 7, it is characterized in that, described trimming cam side face be provided with slide block import hole, described slide block import hole aperture area taper into bottom from opening, described in the section of dodging be positioned at described slide block import hole bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310734120.XA CN103726241B (en) | 2013-12-27 | 2013-12-27 | Column Sewing machine with needle feed thread cutting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310734120.XA CN103726241B (en) | 2013-12-27 | 2013-12-27 | Column Sewing machine with needle feed thread cutting mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103726241A CN103726241A (en) | 2014-04-16 |
| CN103726241B true CN103726241B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310734120.XA Expired - Fee Related CN103726241B (en) | 2013-12-27 | 2013-12-27 | Column Sewing machine with needle feed thread cutting mechanism |
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| CN (1) | CN103726241B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592121A (en) * | 2017-01-18 | 2017-04-26 | 浙江飞凤缝制设备有限公司 | Sewing machine automatic shearing mechanism |
| CN106988040A (en) * | 2017-06-05 | 2017-07-28 | 标准缝纫机菀坪机械有限公司 | A kind of integrative feeding sewing machine thread cutting mechanism |
| CN107419448B (en) * | 2017-06-24 | 2023-07-11 | 浙江中捷缝纫科技有限公司 | Thread cutting mechanism of sewing machine |
| TWM567278U (en) * | 2018-03-08 | 2018-09-21 | 吳謹明 | Structure improvement of thread cutting mechanism of sewing machine |
| CN108589081A (en) * | 2018-08-02 | 2018-09-28 | 吴体民 | The cutting facility of column sewing machine |
| CN110042580B (en) * | 2019-06-04 | 2023-12-22 | 上海博岙机电制造有限公司 | Improved generation high platform truck flat knife cuts line's movable knife mechanism |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1147834B (en) * | 1961-12-13 | 1963-04-25 | Pfaff Ag G M | Thread trimmer on sewing machines |
| JP5042573B2 (en) * | 2006-09-15 | 2012-10-03 | Ｊｕｋｉ株式会社 | sewing machine |
| JP2011101718A (en) * | 2009-11-11 | 2011-05-26 | Juki Corp | Thread cutting device of sewing machine |
| CN202898752U (en) * | 2012-05-21 | 2013-04-24 | 东莞市嘉龙皮革机械有限公司 | Air cylinder actuating cam automatic trimming device |
| CN203729067U (en) * | 2013-12-27 | 2014-07-23 | 浙江飞凤缝制设备有限公司 | Thread trimming mechanism of vertical post needle feeding sewing machine |
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2013
- 2013-12-27 CN CN201310734120.XA patent/CN103726241B/en not_active Expired - Fee Related
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