CN109267250A - A kind of cutting facility and its thread cutting method of sewing machine - Google Patents
A kind of cutting facility and its thread cutting method of sewing machine Download PDFInfo
- Publication number
- CN109267250A CN109267250A CN201811347834.4A CN201811347834A CN109267250A CN 109267250 A CN109267250 A CN 109267250A CN 201811347834 A CN201811347834 A CN 201811347834A CN 109267250 A CN109267250 A CN 109267250A
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- distributor plate
- line
- rotating shuttle
- sewing machine
- tailgate
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
- D05B65/006—Devices for severing the needle or lower thread with heated tools
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The present invention provides a kind of cutting facility of sewing machine and its thread cutting methods, belong to technical field of sewing machines.It solves existing trimming structure and cuts that rear remaining the end of a thread is different in size, the end of a thread notch is irregular, the technical problems such as bad stitching easy to form when playing seam.This cutting facility includes the driving mechanism that distributor plate, fervent cutter and driving distributor plate are rotated around the central axes of rotating shuttle, the leading flank of distributor plate is equipped with the separated time groove for accommodating suture, when trimming, the cutter head of fervent cutter can be tightly attached to the left part of distributor plate upper side.The present invention uses ultrasonic wave trimming, and cutter head can be located at apart from eedle closer proximity, and remaining the end of a thread is shorter, and to the thickness of the end of a thread without limitation, can prevent from forming " Bird's Nest " ball of string when seam.
Description
Technical field
The invention belongs to technical field of sewing machines, refer in particular to the cutting facility and its thread cutting method of a kind of sewing machine.
Background technique
The trimming structure of existing sewing is that the movable blade and stationary knife, stationary knife below needle plate and above rotating shuttle are fixed on
On sewing machine matrix, movable blade is driven by driving mechanism to be rotated around lower axle, movable point of a knife parting plane line wire loop with suture to
Stationary knife direction is mobile, cuts off suture in the mechanical snap that eedle side movable blade and stationary knife carry out high pressure.The stitching of sewing machine
It is mutually to be moved by eedle and rotating shuttle and formed, in the case where guaranteeing normal sewing state, suture cannot encounter the trimming edge of a knife, while not
The movement of eedle and rotating shuttle can be influenced, movable blade and stationary knife must just avoid moving part motion range, and stationary knife is fixed on eedle
Center side, stationary knife and eedle center will be there are a distances, and due to mechanical snap trimming, suture is in tensioned state, makes
Residual the end of a thread is too long and unstable on sewed product after trimming and to stay in residual upper thread the end of a thread length of eedle side unstable,
Blade is engaged friction for a long time, and thread cutting stability is poor, and service life is short, it is difficult to cut compared with tailor-tacking line, and cutting mechanics noise
It greatly, is that hardness is pulled open under the powerful pressure of cutter by cutting the end of a thread, the defects of the end of a thread notch is irregular, wire drawing, the end of a thread scatter.
Longer the end of a thread is remained on sewed product needs to increase artificial trimming the end of a thread process；The unstable upper thread the end of a thread of length is sewed in next time
Former needles form bad stitching (Bird's Nest), influence the quality of sewed product.
In order to solve the problems, such as seam Bird's Nest, there is a kind of head to pass through installation sliding wire-clamping device for thread end clamp in industry at present
Firmly, blade is set on presser feet, and pullling by wire-clamping device and sewing, makes to be cut on the top presser feet edge of a knife of the end of a thread when playing seam
It is disconnected, solve the problems, such as " Bird's Nest ".Technological means in this way has solved the problems, such as that seam Bird's Nest but causes head attachment means to influence behaviour
Make space, presser feet band blade is not general, and thick line blade cuts the end of a thread constantly cut off and air draught collection is needed to handle, and air draught needs gas
Source, presser feet secant will lead to the appearance that the end of a thread remains in a series of problems, such as sewing positive influences are beautiful.
Summary of the invention
The object of the present invention is to provide a kind of new cutting facility, which is the trimming problem after the completion of can solve and can solve
Certainly play seam Bird's Nest problem.
The object of the present invention is achieved like this:
A kind of cutting facility of sewing machine, it is characterised in that: including distributor plate, fervent cutter and driving distributor plate around rotating shuttle
Central axes rotation driving mechanism, the leading flank of the distributor plate is equipped with the separated time groove for accommodating suture, when trimming,
The cutter head of the fervent cutter can be tightly attached to the left part of distributor plate upper side.
In this cutting facility, fervent cutter can be located at eedle, needle plate side, and the cutting position closer apart from eedle makes to stitch
Material residual the end of a thread is shorter；And to cut-off suture the end of a thread thickness without limitation, part exchanging is few, and biggish mechanical shearing is not present
The friction of power, blade is smaller, and the service life is longer for part；Perfect edge sealing is realized at the material position of cutting, prevents suture material loose
Scattered feature, while can realize the anti-Bird's Nest function of seam, that realizes sewing machine high-quality stablizes sewing；Above-mentioned fervent cutter is super
Sound wave cutter and electrical knife.
In a kind of cutting facility of above-mentioned sewing machine, the rotating shuttle is equipped with can be around the rotation of the central axes of rotating shuttle
Off-line tailgate, the off-line tailgate are located at the inside of distributor plate, and the leading flank of the distributor plate is located at the leading flank of off-line tailgate
Rear side.The above-mentioned positional relationship of off-line tailgate and distributor plate was not only favorably rotated with off-line tailgate and distributor plate independently of each other, but also
The leading flank of distributor plate can be smoothly tightly attached to when suture is detached from from off-line tailgate and eventually fallen into separated time groove,
The stability of work is more preferable.
In a kind of cutting facility of above-mentioned sewing machine, the leading flank of the rotating shuttle is equipped with locating slot, the rotating shuttle
Front side be equipped with bottom plate be connected location hook, the location hook trailing flank middle part setting guiding projection can extend into positioning
In slot, the left cell wall of the locating slot is equipped with locating convex block, between the trailing flank of the locating convex block and the slot bottom of locating slot
There are there are gaps between the left side wall of gap, right side and guiding projection.
In a kind of cutting facility of above-mentioned sewing machine, the right part of the off-line tailgate leading flank has from left to right
The guide surface for the arc-shaped that width becomes narrow gradually.The design of guide surface can be such that suture more smoothly takes off from off-line tailgate
From.
In a kind of cutting facility of above-mentioned sewing machine, the front end of the left cell wall of the separated time groove is located at right cell wall
The left cell wall of the rear side of front end, the separated time groove is gradually tilted to the left from front to back.The design energy of separated time groove above structure
Enough ensure that suture smoothly enters in separated time groove, and locates always during distributor plate rotates clockwise homing
It in separated time groove, avoids sliding, the stability of off-line process is higher.
In a kind of cutting facility of above-mentioned sewing machine, the lower end of the fervent cutter is fixed with ultrasonic variable amplitude bar,
The ultrasonic variable amplitude bar with the ultrasonic transducer on bottom plate be fixed on by mounting bracket be connected.Wherein ultrasonic transducer
Middle connection live wire, ultrasonic transducer can convert electrical energy into mechanical energy (ultrasonic wave), and ultrasonic variable amplitude bar is by ultrasonic wave
The Amplitude amplification of energy converter output passes to fervent cutter, and amplitude is further amplified in fervent cutter, focuses ultrasonic wave, output ultrasound
Ultrasonic energy concentration is input to by cutting part by wave using cutter.
In a kind of cutting facility of above-mentioned sewing machine, the rotating shuttle is fixed on the front end of main shaft, the main shaft
Rear end is connected with the first actuator, and being arranged on the main shaft on rear side of the rotating shuttle can be described around the dividing wire frame of main axis
The rear side and dividing wire frame of distributor plate right part are connected, and the dividing wire frame is equipped with the interconnecting piece connecting with driving mechanism.
In a kind of cutting facility of above-mentioned sewing machine, the driving mechanism includes transmission shaft and driving transmission shaft rotation
The rear end of the second actuator turned, second actuator and transmission shaft connects, front end and the driving crank of the transmission shaft
One end is connected, and the other end of the driving crank and one end of drive link are hinged, the other end and separated time of the drive link
Interconnecting piece on frame is hinged.
In a kind of cutting facility of above-mentioned sewing machine, the rear end of the transmission shaft, which is arranged, is fixed with connector, described
One end of connector forms the driving plate of L font, is equipped with and divides between one end of the driving plate and the piston of the second actuator
The not connecting rod hinged with the two, the other end of the driving plate are equipped with rotatable idler wheel, the idler wheel and are fixed on master
The lateral surface of cam on axis leans.
In a kind of cutting facility of above-mentioned sewing machine, the cam is recessed equipped with the first contour groove and second
Slot, in the counterclockwise direction, first groove are located on front side of the second groove.
In a kind of cutting facility of above-mentioned sewing machine, the reset that driving piston sets back is arranged on the piston
Spring.
A kind of thread cutting method using above-mentioned cutting facility, characterized by the following steps:
A off-line: controlling off-line tailgate by the first actuator and the second actuator and distributor plate rotate counterclockwise,
The suture between off-line tailgate and location hook is set to deviate from and enter in the separated time groove of distributor plate by the control to timing；
B bracing wire: second actuator stops driving, and distributor plate resets under the collective effect of reset spring and cam,
In distributor plate reseting procedure, pull back into the suture in separated time groove along distributor plate surface grooves, after separated time sheet reset, earnestly
The cutter head of cutter is tightly attached to the left part of distributor plate, and suture is compressed between cutter head and distributor plate upper surface；
C trimming: starting ultrasonic transducer cuts formation high-frequency ultrasonic at the cutter head of fervent cutter by suture.
Further, in the step A, when sewing machine, which has stitched, carries out trimming, the first actuator first drives the rotating shuttle inverse time
The upper thread of needle rotation, eedle side is deviate from from the off-line tailgate of rotating shuttle around rotating shuttle, and upper thread is divided into below eedle by rotating shuttle
"eight" shape, the upper thread deviate from from the off-line tailgate of rotating shuttle at this time are located in locating slot, and then the second actuator drives separated time
Plate rotates counterclockwise, and the front end of distributor plate passes through on the downside of the upper thread of "eight" shape and continues to rotate, until being located in locating slot
Upper thread enters in the separated time groove of distributor plate, realizes off-line.
Further, in the step A, when sewing machine plays seam, eedle passes through sewing with upper thread and enters below needle plate,
First actuator drives rotating shuttle rotation, and before not deviating from also at off-line tailgate of the upper thread around rotating shuttle and from rotating shuttle, second is driven
Moving part drives the separated time groove of distributor plate to rotate counterclockwise to immediately below eedle one step ahead, and then the off-line tailgate of rotating shuttle is with rotation
The underface for going to eedle of shuttle, and continue counterclockwise rotation, when the right end of off-line tailgate turn to eedle just under
Fang Shi, upper thread can be detached from from off-line tailgate and enter in the separated time groove of distributor plate, realize off-line.
The present invention is prominent and beneficial compared with prior art to be had the technical effect that
1, since fervent cutter is high frequency machinery wave trimming in the present invention, the fervent cutter of cutter keen edge can be located at machine
Needle, needle plate side, the cutting position closer apart from eedle, it is shorter that sewing remains the end of a thread；And to cut-off suture the end of a thread thickness
Without limitation, part exchanging is few, and biggish mechanical shear stress is not present, and the friction of blade is smaller, adds a little low noises, and part uses the longevity
It orders longer.
2, the present invention is cut using ultrasonic wave, and suture makes cutting part moment soft under the action of ultrasonic energy
Change, fusing, perfect edge sealing can be realized to the material position of cutting, the feature that suture material is loose is prevented, realizes sewing machine Gao Pin
Matter stablizes sewing.
3, the present invention is cut using ultrasonic wave, and the tangent line edge of a knife (ultrasonic wave) has sewing-machine control systems to directly control,
Therefore anti-Bird's Nest function can be realized playing seam process.
Detailed description of the invention
Fig. 1 is the original state figure of the distributor plate of cutting facility of the invention.
Fig. 2 is the separated time state diagram of the anti-Bird's Nest of cutting facility of the invention.
Fig. 3 is the off-line state diagram of the anti-Bird's Nest of cutting facility of the invention.
Fig. 4 is the off-line state diagram of the trimming of cutting facility of the invention.
Fig. 5 is the off-line state diagram of the trimming of cutting facility of the invention.
Fig. 6 is the structural schematic diagram of the driving mechanism of cutting facility of the invention.
Fig. 7 is the structural schematic diagram of the cam of cutting facility of the invention.
In figure, 1, bottom plate；11, main shaft；12, cam；121, the first groove；122, the second groove；13, dividing wire frame；131,
Interconnecting piece；21, transmission shaft；22, the second actuator；23, crank is driven；24, drive link；25, connector；26, driving plate；
27, connecting rod；28, idler wheel；29, reset spring；31, fervent cutter；32, ultrasonic variable amplitude bar；33, ultrasonic transducer；34,
Mounting bracket；4, distributor plate；41, separated time groove；5, rotating shuttle；51, off-line tailgate；511, guide surface；52, locating slot；53, it positions
Convex block；6, location hook；61, guiding projection；7, suture；8, eedle.
Specific embodiment
With specific embodiment, the invention will be further described with reference to the accompanying drawing, referring to Fig. 1-7:
The cutting facility of this sewing machine includes distributor plate 4, fervent cutter 31 and driving distributor plate 4 around the central axes of rotating shuttle 5
The driving mechanism of rotation, the cutter head of fervent cutter 31 can be tightly attached to the left part of distributor plate 4, set on the leading flank of distributor plate 4
There is the separated time groove 41 for accommodating suture 7.Above-mentioned fervent cutter 31 can be located at eedle 8, needle plate side, closer apart from eedle 8
Cutting position, so that sewing is remained the end of a thread shorter；And to cut-off 7 the end of a thread thickness of suture without limitation, part exchanging is few, does not deposit
Smaller in the friction of biggish mechanical shear stress, blade, the service life is longer for part；Realize perfect envelope in the material position of cutting
Side, the feature for preventing 7 material of suture loose, while can realize the anti-Bird's Nest function of seam, that realizes sewing machine high-quality stablizes seam
It threads；Above-mentioned suture 7 is upper thread, and after the completion of sewing when trimming, this cutting facility also can simultaneously be sheared baseline.
As shown in Figs 1-4, the off-line tailgate 51 that rotating shuttle 5 can be followed to rotate is fixed on rotating shuttle 5, off-line tailgate 51 is located at
The inside of distributor plate 4, the leading flank of distributor plate 4 are located at the rear side of the leading flank of off-line tailgate 51；The leading flank of rotating shuttle 5 is equipped with
Locating slot 52, the front side of rotating shuttle 5 are equipped with the location hook 6 being connected with bottom plate 1, and the guiding of the middle part setting of 6 trailing flank of location hook is convex
Block 61 can extend into locating slot 52, and the left cell wall of locating slot 52 is equipped with locating convex block 53, the trailing flank of locating convex block 53 with
There are there are gaps between gap, right side and the left side wall of guiding projection 61 between the slot bottom of locating slot 52；Off-line tailgate 51
The right part of leading flank has the guide surface 511 for the arc-shaped that width becomes narrow gradually from left to right.Off-line tailgate 51 and distributor plate 4
Above-mentioned positional relationship not only favorably rotated independently of each other with off-line tailgate 51 and distributor plate 4, but also can be in suture 7 from off-line tailgate
51 are smoothly tightly attached to the leading flank of distributor plate 4 and eventually fall into separated time groove 41 when disengaging, and the stability of work is more
It is good；The design of guide surface 511 can be such that suture 7 is more smoothly detached from from off-line tailgate 51.
As shown in figure 3, the front end of the left cell wall of separated time groove 41 is located at the rear side of the front end of right cell wall, separated time groove 41
Left cell wall is gradually tilted to the left from front to back.The design of 41 above structure of separated time groove can ensure that suture 7 smoothly enters
It in separated time groove 41, and is constantly in separated time groove 41, avoids during distributor plate 4 rotates clockwise homing
It slides, the stability of off-line process is higher.
As shown in figures 1 to 6, the lower end of fervent cutter 31 is fixed with ultrasonic variable amplitude bar 32, ultrasonic variable amplitude bar 32 with
The ultrasonic transducer 33 on bottom plate 1 is fixed on by mounting bracket 34 to be connected.Wherein electricity is connected in ultrasonic transducer 33
Line, ultrasonic transducer 33 can convert electrical energy into mechanical energy (ultrasonic wave), and ultrasonic variable amplitude bar 32 is by ultrasonic transducer
The Amplitude amplification of 33 outputs passes to fervent cutter 31, and amplitude is further amplified in fervent cutter 31, focuses ultrasonic wave, output ultrasound
Ultrasonic energy concentration is input to by cutting part by wave using cutter.
As shown in fig. 6, rotating shuttle 5 is fixed on the front end of main shaft 11, the rear end of main shaft 11 is connected with the first actuator, rotation
Be arranged with 4 frame 13 of distributor plate that can be rotated around main shaft 11 on the main shaft 11 of the rear side of shuttle 5, the rear side of 4 right part of distributor plate with point
4 frame 13 of line plate is connected, and 4 frame 13 of distributor plate is equipped with the interconnecting piece 131 connecting with driving mechanism；Driving mechanism includes transmission shaft 21
And the second actuator 22 that driving transmission shaft 21 rotates, the second actuator 22 are connect with the rear end of transmission shaft 21, transmission shaft 21
Front end and driving crank 23 one end be connected, drive crank 23 the other end and drive link 24 one end it is hinged, driving company
Interconnecting piece 131 on the other end and dividing wire frame of bar 24 is hinged；The rear end of transmission shaft 21, which is arranged, is fixed with connector 25, connector
25 one end forms the driving plate 26 of L font, and difference is equipped between one end of driving plate 26 and the piston of the second actuator 22
The connecting rod 27 hinged with the two, the other end of driving plate 26 are equipped with rotatable idler wheel 28, idler wheel 28 and are fixed on main shaft
The lateral surface of cam 12 on 11 leans；Cam 12 is equipped with contour the first groove 121 and the second groove 122, in the inverse time
On needle direction, the first groove 121 is located at 122 front side of the second groove；The reset bullet that driving piston sets back is arranged on piston
Spring 29；Above-mentioned first actuator and the second actuator 22 can be motor or cylinder
Since fervent cutter 31 is high frequency machinery wave trimming in the present invention, the fervent cutter 31 of cutter keen edge can be located at
Eedle 8, needle plate side, the cutting position closer apart from eedle 8, it is shorter that sewing remains the end of a thread；And to cut-off 7 the end of a thread of suture
For thickness without limitation, part exchanging is few, biggish mechanical shear stress is not present, the friction of blade is smaller, adds a little low noises, and part makes
Use longer life expectancy；It is cut using ultrasonic wave, suture 7 makes the softening of cutting part moment under the action of ultrasonic energy, melts
Change, perfect edge sealing can be realized to the material position of cutting, the feature for preventing 7 material of suture loose realizes sewing machine high-quality
Stablize sewing.
There are two types of embodiments for this thread cutting method tool, under normal sewing state, as shown in Figure 1, distributor plate 4 is resetting bullet
The effect of spring 29 is lower to stablize in initial position, and distributor plate 4 is located at 8 side of eedle, and sewing machine is normally sewed.
The first embodiment:
A off-line: when sewing machine, which has stitched, carries out trimming, the first actuator elder generation driving spindle 11 of sewing machine turns counterclockwise
Dynamic, the cam 12 and rotating shuttle 5 being mounted on main shaft 11 also rotate counterclockwise together, when the off-line tailgate 51 of rotating shuttle 5 moves to machine
After immediately below needle 8, with the continuation rotary motion of rotating shuttle 5, the upper thread of 8 side of eedle bypasses off-line tailgate of the rotating shuttle 5 from rotating shuttle 5
Deviate from 51, upper thread is divided into "eight" shape by rotating shuttle 5 below eedle 8, as shown in figure 4, at this time from the off-line tailgate 51 of rotating shuttle 5
The upper thread of place's abjection is located in locating slot 52, and then 22 drive connection bar 27 of the second actuator drives driving plate 26 around transmission shaft 21
It swings, transmission shaft 21 is promoted to rotate, the idler wheel 28 being mounted in driving plate 26 is located at the first groove of trimming starting point of cam 12
In 121, the driving crank 23 for being mounted on 21 front end of transmission shaft drives drive link 24 to drive 4 frame 13 of distributor plate and be mounted on point
Around the central axes of main shaft 11 counterclockwise to a side oscillation of eedle 8, the front end of distributor plate 4 passes through distributor plate 4 on 4 frame 13 of line plate
It is continued to rotate after on the downside of the upper thread of "eight" shape, as shown in figure 5, until the upper thread being located in locating slot 52 enters distributor plate 4
Separated time groove 41 in, realize off-line.
B bracing wire: the first actuator continues driving spindle 11 and rotates, and the second actuator 22 stops driving, and distributor plate 4 is resetting
It is resetted under the collective effect of spring 29 and cam 12, in 4 reseting procedure of distributor plate, into 7 edge of suture in separated time groove 41
4 surface grooves of distributor plate are pulled back, and after distributor plate 4 resets, the cutter head of fervent cutter 31 is tightly attached to the left part of distributor plate 4, opposite joint
Line 7 forms clamping shape；
C trimming: sewing-machine control systems control ultrasonic transducer 33 and start, and make to form height at the cutter head of fervent cutter 31
Frequency ultrasonic cuts suture 7, and then control cutting supersonic generator power supply, the relatively short-term head of cutting stay on sewing, most
Completing sewing eventually terminates trimming movement.
Second of embodiment:
A off-line: when sewing machine plays seam, eedle 8 passes through sewing with upper thread and enters below needle plate, and the first of sewing machine drives
Moving part elder generation driving spindle 11 rotates counterclockwise, and the cam 12 and rotating shuttle 5 being mounted on main shaft 11 also rotate counterclockwise together, in machine
The upper thread of 8 side of needle from the off-line tailgate 51 of rotating shuttle 5 around rotating shuttle 5 and before not deviating from also, and eedle 8 is by upward below needle plate
In motion process, sewing-machine control systems control the second actuator 22 and drive driving plate 26 to put around transmission shaft 21 by connecting rod 27
It is dynamic, promote transmission shaft 21 to rotate；The idler wheel 28 being mounted in driving plate 26 contacts the second groove of trimming starting point of cam 12
122, the driving crank 23 for being mounted on 21 front end of transmission shaft drives drive link 24 to drive 4 frame 13 of distributor plate and be mounted on separated time
Distributor plate 4 on 4 frame 13 of plate swings to extreme position to the side of eedle 8 counterclockwise around the central axes of main shaft 11, at this time separated time
The separated time groove 41 of plate 4 is located at immediately below eedle 8, as shown in Fig. 2, sewing machine continues to move, wheel rolling contact cam 12 is by second
Groove 122 rotates to the first groove 121, due on cam 12 the first groove 121 and the second groove 122 it is contour, this section movement
Distributor plate 4 rests on always extreme position, and the right end of off-line tailgate 51 goes to eedle 8 with rotating shuttle 5 during this
Underface, as shown in figure 3, upper thread can be detached from from off-line tailgate 51 and enter in the separated time groove 41 of distributor plate 4 at this time, it is real
Existing off-line.
B bracing wire: the first actuator continues driving spindle 11 and rotates, and the second actuator 22 stops driving, and distributor plate 4 is resetting
It is resetted under the collective effect of spring 29 and cam 12, in 4 reseting procedure of distributor plate, into 7 edge of suture in separated time groove 41
4 surface grooves of distributor plate are pulled back, and after distributor plate 4 resets, the cutter head of fervent cutter 31 is tightly attached to the left part of distributor plate 4, opposite joint
Line 7 forms clamping shape；
C trimming: sewing-machine control systems control ultrasonic transducer 33 and start, and make to form height at the cutter head of fervent cutter 31
Frequency ultrasonic cuts suture 7, and then control cutting supersonic generator power supply, the relatively short-term head of cutting stay on sewing, most
Completing sewing eventually terminates trimming movement；7, suture have been cut off in this way, and the end of a thread is prevented to be wound " Bird's Nest " ball of string.
Above-described embodiment is only presently preferred embodiments of the present invention, and the top to bottom, left and right, front and rear that are directed to inside and outside are
For opposite attached drawing, change may be had after rotation, is not limited the scope of the invention according to this, therefore: Fan Yibenfa
The equivalence changes that bright structure, shape, principle are done, should all be covered by within protection scope of the present invention.
Claims (14)
1. a kind of cutting facility of sewing machine, it is characterised in that: including distributor plate (4), fervent cutter (31) and driving distributor plate
(4) leading flank of the driving mechanism rotated around the central axes of rotating shuttle (5), the distributor plate (4) is equipped with for accommodating suture (7)
Separated time groove (41), when trimming, the cutter head of the fervent cutter (31) can be tightly attached to the left end of distributor plate (4) upper side
Portion.
2. a kind of cutting facility of sewing machine according to claim 1, it is characterised in that: the rotating shuttle (5) is equipped with energy
The off-line tailgate (51) that enough central axes around rotating shuttle (5) rotate, the off-line tailgate (51) are located at the inside of distributor plate (4), institute
State distributor plate (4) leading flank be located at off-line tailgate (51) leading flank rear side.
3. a kind of cutting facility of sewing machine according to claim 2, it is characterised in that: the leading flank of the rotating shuttle (5)
It is equipped with locating slot (52), the front side of the rotating shuttle (5) is equipped with the location hook (6) being connected with bottom plate (1), the location hook (6)
The guiding projection (61) of the middle part setting of trailing flank can extend into locating slot (52), set on the left cell wall of the locating slot (52)
Have locating convex block (53), there are gaps, right side between the trailing flank of the locating convex block (53) and the slot bottom of locating slot (52)
There are gaps between the left side wall of guiding projection (61).
4. a kind of cutting facility of sewing machine according to claim 2, it is characterised in that: on front side of the off-line tailgate (51)
The right part in face has the guide surface (511) for the arc-shaped that width becomes narrow gradually from left to right.
5. a kind of cutting facility of sewing machine according to claim 1, it is characterised in that: a left side for the separated time groove (41)
The front end of cell wall is located at the rear side of the front end of right cell wall, and the left cell wall of the separated time groove (41) gradually inclines to the left from front to back
Tiltedly.
6. a kind of cutting facility of sewing machine according to claim 1, it is characterised in that: under the fervent cutter (31)
End is fixed with ultrasonic variable amplitude bar (32), and the ultrasonic variable amplitude bar (32) is fixed on bottom plate (1) with by mounting bracket (34)
On ultrasonic transducer (33) be connected.
7. a kind of cutting facility of sewing machine described in -6 any one according to claim 1, it is characterised in that: the rotating shuttle
(5) it is fixed on the front end of main shaft (11), the rear end of the main shaft (11) is connected with the first actuator, after the rotating shuttle (5)
The dividing wire frame (13) that can be rotated around main shaft (11), the rear side of distributor plate (4) right part are arranged on the main shaft (11) of side
It is connected with dividing wire frame (13), the dividing wire frame (13) is equipped with the interconnecting piece (131) connecting with driving mechanism.
8. a kind of cutting facility of sewing machine according to claim 7, it is characterised in that: the driving mechanism includes transmission
Axis (21) and the second actuator (22) of driving transmission shaft (21) rotation, second actuator (22) and transmission shaft (21)
Rear end connection, the front end of the transmission shaft (21) and one end of driving crank (23) are connected, described to drive the another of crank (23)
Hold, interconnecting piece (131) the hinge other end and dividing wire frame of the drive link (24) on hinged with one end of drive link (24)
It connects.
9. a kind of cutting facility of sewing machine according to claim 8, it is characterised in that: the rear end of the transmission shaft (21)
It is arranged and is fixed with connector (25), one end of the connector (25) forms the driving plate (26) of L font, the driving plate
(26) connecting rod (27) hinged with the two respectively, the driving plate are equipped between the piston of one end and the second actuator (22)
(26) the other end is equipped with rotatable idler wheel (28), the idler wheel (28) and the cam (12) that is fixed on main shaft (11)
Lateral surface leans.
10. a kind of cutting facility of sewing machine according to claim 9, it is characterised in that: the cam (12) is equipped with
Contour the first groove (121) and the second groove (122), in the counterclockwise direction, it is recessed that first groove (121) is located at second
On front side of slot (122).
11. a kind of cutting facility of sewing machine according to claim 9, it is characterised in that: be arranged with drive on the piston
The reset spring (29) that piston sets back.
12. a kind of thread cutting method using above-mentioned cutting facility, characterized by the following steps:
A off-line: pass through the off-line tailgate (51) and distributor plate (4) of the first actuator and the second actuator (22) control rotating shuttle (5)
It rotates counterclockwise, the abjection of the suture (7) between off-line tailgate (51) and location hook (6) is made simultaneously by the control to timing
Into in the separated time groove (41) of distributor plate (4)；
B bracing wire: second actuator (22) stops driving, and distributor plate (4) is common reset spring (29) and cam (12)
Effect is lower to be resetted, in distributor plate (4) reseting procedure, into the suture (7) in separated time groove (41) along distributor plate (4) surface ditch
Slot is pulled back, and after distributor plate (4) resets, the cutter head of fervent cutter (31) is tightly attached to the left part of distributor plate (4), and suture (7) is squeezed
It is pressed between cutter head and distributor plate (4) upper surface；
C trimming: starting ultrasonic transducer (33) makes to be formed high-frequency ultrasonic at the cutter head of fervent cutter (31) for suture (7)
It cuts.
13. a kind of thread cutting method using above-mentioned cutting facility according to claim 12, it is characterised in that: the step
In A, when sewing machine, which has stitched, carries out trimming, the first actuator driving off-line tailgate (51) is rotated counterclockwise, eedle (8) side
Upper thread is deviate from the off-line tailgate (51) of rotating shuttle (5) around rotating shuttle (5), and upper thread is divided into below eedle (8) by rotating shuttle (5)
"eight" shape, the upper thread deviate from the off-line tailgate (51) of rotating shuttle (5) at this time are located in locating slot (52), then the second driving
Part (22) driving distributor plate (4) rotates counterclockwise, and the front end of distributor plate (4) passes through on the downside of the upper thread of "eight" shape and continues to turn
It is dynamic, until the upper thread being located in locating slot (52) enters in the separated time groove (41) of distributor plate (4), realize off-line.
14. a kind of thread cutting method using above-mentioned cutting facility according to claim 12, it is characterised in that: the step
In A, when sewing machine plays seam, eedle (8) passes through sewing with upper thread and enters below needle plate, and the first actuator drives rotating shuttle (5)
Rotation, before not deviating from also at off-line tailgate (51) of the upper thread around rotating shuttle (5) and from rotating shuttle (5), the second actuator (22)
The separated time groove (41) of distributor plate (4) is driven to rotate counterclockwise to immediately below eedle (8) one step ahead, the then off-line of rotating shuttle (5)
Tailgate (51) goes to the underface of eedle (8) with the rotation of rotating shuttle (5), and continues rotation counterclockwise, when off-line tailgate
(51) when right end turns to the underface of eedle (8), upper thread can be detached from off-line tailgate (51) and enter distributor plate (4)
Separated time groove (41) in, realize off-line.
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| CN201811347834.4A CN109267250B (en) | 2018-11-13 | 2018-11-13 | Thread trimming device of sewing machine and thread trimming method thereof |
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| CN201811347834.4A CN109267250B (en) | 2018-11-13 | 2018-11-13 | Thread trimming device of sewing machine and thread trimming method thereof |
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| CN110042579A (en) * | 2019-05-31 | 2019-07-23 | 阮健明 | A kind of thread-trimming lifter-presser foot mechanism and sewing machine |
| CN110130012A (en) * | 2019-07-01 | 2019-08-16 | 浙江龙泰缝纫设备有限公司 | Thread shearing device of sewing machine |
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| CN109267250B (en) | 2021-06-01 |
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Address after: 318000 no.1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |