CN206127623U - Thread shearing device of sewing machine - Google Patents
Thread shearing device of sewing machine Download PDFInfo
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- CN206127623U CN206127623U CN201621103236.9U CN201621103236U CN206127623U CN 206127623 U CN206127623 U CN 206127623U CN 201621103236 U CN201621103236 U CN 201621103236U CN 206127623 U CN206127623 U CN 206127623U
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Abstract
The utility model provides a thread shearing device of sewing machine, sewing machine is including the faller that has the faller tongue, thread shearing device of sewing machine is including stationary knife that has the stationary knife cutting edge and the upper slitter that is used for carrying out the trimming action and has the upper slitter cutting edge, upper slitter cutting edge and the interlock of stationary knife cutting edge looks, and form and be used for the trimming cutting edge of cutting off the suture, the direction of carrying the seam material forward during along the sewing machine sewing, the trimming cutting edge lies in between the leading edge of faller tongue and faller on the faller. The utility model relates to a thread shearing device of sewing machine in, will carry out between the leading edge that trimming cutting edge that trimming action back, stationary knife and the interlock of upper slitter looks formed set up faller tongue and faller on the faller afterwards by the upper slitter for the trimming cutting edge approaches the faller tongue more, thereby can install the position of back trimming inductor on sewing plate, approach the faller tongue more, and then the time point of back trimming shifts to an earlier date after will sewing, effectively avoids lou cutting the phenomenon.
Description
Technical field
This utility model is related to a kind of industrial sewing machine, more particularly to a kind of thread shearing device of sewing machine.
Background technology
At present, front cutting facility and rear cutting facility are equipped with industrial sewing machine, by the electronic control module of sewing machine
Automatically front trimming action and rear trimming action, front trimming action and rear trimming are performed with the sensor being arranged on sewing machine seam platform
Action is typically all made up of stationary knife and rotatable upper slitter.Such as, the Chinese utility model of Application No. 201320559872.2
In a kind of automaton of the industrial sewing machine disclosed in patent specification, the rear cutting facility disclosed in which includes being located at
The stationary knife of the Mesa of sewing sidepiece needle plate adjacent with stationary knife, cutter driving part and the moving knife being connected with cutter driving part,
Cutter driving part can drive moving knife to be rocked at stationary knife, and suture is cut off；In addition, can have no to doubt from its Figure of description 1 and Fig. 2
Ask and uniquely learn：Along the sew cloth direction moved forward in Mesa of sewing, described stationary knife and moving knife in sewing process
Be arranged at the front side of needle plate the front end close to needle plate, therefore, its by suture wire scissorss have no progeny produced by rear line pigtail it is most short
Length is：Length between the blade in needle falling hole and rear cutting facility on needle plate in the longitudinal direction.
But, in the rear cutting facility disclosed in the automaton of above-mentioned industrial sewing machine, due to rear cutting facility
In distance of the blade away from needle falling hole on needle plate it is longer, so as to cause the rear line pigtail produced after trimming long, cause next sewing
When be formed in that the line pigtail on sewing cloth is long, need workman to prune again, efficiency is low；Simultaneously as the blade in rear cutting facility
Distance away from needle falling hole on needle plate is longer, therefore, after sewing machine terminates, it is easy to occur in after rear cutting facility is not carried out and cuts
Before line action, workman drawn diagonally forward
Time point is delayed, so as to cause suture during the trimming action after rear cutting facility is not carried out away from rear cutting facility, finally to be led
The situation that leakage is cut is caused to occur.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model are to provide a kind of sewing machine trimming dress
Put, which can be prevented effectively from leakage cuts phenomenon.
For achieving the above object, this utility model provides a kind of thread shearing device of sewing machine, and the sewing machine is included with pin
The needle plate of plate tongue, the thread shearing device of sewing machine include the stationary knife with stationary knife blade and for performing trimming action and having
The upper slitter of upper slitter blade, the upper slitter blade is mutually engaged with stationary knife blade, and form trimming blade for suture is cut off；Edge
Sewing machine is fed forward the direction of sewing when sewing, the trimming blade is located at the leading edge of the needle plate tongue on needle plate and needle plate
Between.
Preferably, the auxiliary cloth feeding alveolus on front side of needle plate tongue, the trimming blade position are offered on the needle plate
Between the needle plate tongue and auxiliary cloth feeding alveolus on needle plate.
Preferably, the auxiliary cloth feeding alveolus on front side of needle plate tongue, the trimming blade position are offered on the needle plate
Between the auxiliary cloth feeding alveolus and the leading edge of needle plate on needle plate.
Further, the upper surface of the needle plate is provided with a support ledge, and the stationary knife is fixed on needle plate, the upper slitter
It is fixed on the upper cutter shaft extended before and after, the upper cutter shaft is rotatably supported in the support ledge of needle plate.
Preferably, a back-up ring is fixed with the upper cutter shaft, a stage clip is also cased with the upper cutter shaft, before the stage clip
Two ends are leant with the back-up ring and support ledge respectively afterwards, and the pretightning force of the stage clip makes upper slitter near the direction of stationary knife turn
Dynamic rear, the upper slitter blade of upper slitter is mutually engaged with the stationary knife blade of stationary knife.
Further, also including the connecting shaft extended before and after a support base and, the connecting shaft is rotatably supported at
In support base, the connecting shaft is connected by Hooks coupling universal coupling with the upper cutter shaft, and the connecting shaft is by a trimming driving source
Drive and rotate.
Preferably, the trimming driving source is an electric magnet, and the electric magnet has the electromagnet core that can extend downwardly from,
Also include trimming crank and the crank axle for extending in front and back, the electromagnet core is connected by crank axle with one end of trimming crank
Connect, the connecting shaft is fixed in the other end of trimming crank.
Further, also including the stationary knife mounting seat being fixed in the knife group fixed seat of sewing machine, the stationary knife is fixed on
The stationary knife mounting seat, the upper slitter are fixed on the upper cutter shaft extended before and after, and the upper cutter shaft is rotatably supported at knife
In group fixed seat.
Preferably, the line groove excessively for extending in front and back is offered on the upper surface of the stationary knife.
Further, the line of fall gap of up/down perforation is formed between the front end of needle plate tongue and the rear end of stationary knife,
It is provided with rear side of the stationary knife upper surface and tilts to diagonal brace face at line of fall gap obliquely, the back edge in the diagonal brace face forms institute
Stationary knife blade is stated, the stationary knife blade is less than needle plate tongue, cuts by described in the stationary knife blade and upper slitter blade that are engaged are formed
Line blade is located at the lower section of needle plate tongue.
Preferably, the upper slitter blade on the stationary knife blade and upper slitter on the stationary knife is all along perpendicular to the work feed side of sewing machine
Extend to the left and right.
Further, also including the rear trimming induction apparatuss being installed on sewing machine seam platform, the rear trimming induction apparatuss and sewing
The electronic control module of machine is connected；When rear trimming induction apparatuss detect grey sheeting split by rear trimming induction apparatuss, the sewing machine
The eedle of electric control module controls sewing machine is walked after N pins again, makes the upper slitter perform trimming action, N≤0.
As described above, the thread shearing device of sewing machine that this utility model is related to, has the advantages that：
In the thread shearing device of sewing machine that the application is related to, will be performed after trimming action by upper slitter, stationary knife is mutually engaged with upper slitter
After the trimming blade for being formed is arranged between the needle plate tongue on needle plate and the leading edge of needle plate so that trimming blade more connects
Needle plate tongue is bordering on, such that it is able to by for detecting whether the position for there are the rear trimming induction apparatuss that sewing back edge passes through is arranged on
On seam platform, and positioned at the rear side of needle plate leading edge, the position of rear trimming induction apparatuss is moved backward, be closer to needle plate tongue
Head, so after sewing is terminated after the time point of trimming shift to an earlier date, and then be prevented effectively from.
Description of the drawings
Fig. 1 is the structural representation of thread shearing device of sewing machine first embodiment in the application.
A circle enlarged drawings of the Fig. 2 for Fig. 1.
Fig. 3 is the connection diagram of needle plate and upper slitter in Fig. 1.
Fig. 4 is the connection diagram of needle plate and stationary knife in Fig. 1.
Fig. 5 is the structural representation of thread shearing device of sewing machine second embodiment in the application.
B circle enlarged drawings of the Fig. 6 for Fig. 5.
Fig. 7 is the structural representation of thread shearing device of sewing machine 3rd embodiment in the application.
Fig. 8 is the structural representation of thread shearing device of sewing machine fourth embodiment in the application.
Fig. 9 is the structural representation of the 5th embodiment of thread shearing device of sewing machine in the application.
Component label instructions
1 needle plate
101 needle plate tongues
102 needle falling holes
103 auxiliary cloth feeding alveolus
104 support ledges
105 auxiliary cloth feeding portions
2 stationary knifes
21 cross line groove
22 diagonal brace faces
3 upper slitters
31 trimming blades
Cutter shaft on 4
5 back-up rings
6 stage clips
7 support bases
8 connecting shafts
9 Hooks coupling universal couplings
10 trimming driving sources
11 trimming cranks
12 crank axles
13 knife group fixed seats
14 stationary knife mounting seats
15 line of fall gaps
Trimming induction apparatuss after 16
17 seam platforms
18 seam induction apparatuss
Trimming induction apparatuss before 19
20 upper slitter support bases
Specific embodiment
Embodiment of the present utility model is illustrated by particular specific embodiment below, those skilled in the art can be by this
Content disclosed by description understands other advantages of the present utility model and effect easily.
It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., only to coordinate description to be taken off
The content shown, so that those skilled in the art understands and reads, is not limited to the enforceable restriction bar of this utility model
Part, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not affecting
Under effect that this utility model can be generated and the purpose that can reach, still all should fall in the technology disclosed in this utility model
In the range of Rong get Neng is covered.Meanwhile, in this specification it is cited as " on ", D score, "left", "right", " centre " and " one "
Deng term, be merely convenient to describe understands, and is not used to limit the enforceable scope of this utility model, its relativeness
It is altered or modified, under without essence change technology contents, when being also considered as the enforceable category of this utility model.
In following examples, all directions are defined as follows：The width of sewing machine is defined as into fore-and-aft direction, will sewing
The length direction of machine is defined as left and right directions, the short transverse of sewing machine is defined as above-below direction, and front direction is in sewing
During, the moving direction that sews cloth on seam platform 17, the head of sewing machine is located at the left side of sewing machine, and the tail of sewing machine is located at
The right side of sewing machine.
The application provides a kind of thread shearing device of sewing machine, is installed on various industrial sewing machines, is particularly well-suited in overedger
Rear trimming, for shearing suture after sewing terminates, and effectively shorten the rear line of be formed in sewing rear edge after trimming
The length of pigtail, therefore the thread shearing device of sewing machine is also the rear cutting facility in sewing machine.Such as Fig. 1 and Fig. 2 or Fig. 5 and Fig. 6
Shown, the sewing machine for being provided with the thread shearing device of sewing machine includes the needle plate 1 with needle plate tongue 101, the needle plate tongue
101 right sides for being located at needle plate 1, offer the needle falling hole 102 on the left of needle plate tongue 101, the needle falling hole on the needle plate 1
About 102 run through needle plate 1, and the quantity of needle falling hole 102 is identical with the quantity of eedle in sewing machine, such as：It is provided with sewing machine
During two eedles, then two needle falling holes 102 are correspondingly arranged on needle plate 1, as shown in Fig. 2 two needle falling holes 102 or so arranging
Put.The needle plate 1 is arranged on the seam platform 17 of sewing machine.Meanwhile, seam induction apparatuss have been installed on the upper surface of the seam platform 17
18th, front trimming induction apparatuss 19 and rear trimming induction apparatuss 16, described seam induction apparatus 18, front trimming induction apparatuss 19 and the sensing of rear trimming
Device 16 is all connected with the electronic control module of sewing machine, rise seam induction apparatuss 18, front trimming induction apparatuss 19 and rear trimming induction apparatuss 16 by
Arranged to front successively afterwards；Wherein, when the leading edge for having sewing has passed through to stitch induction apparatuss 18, then sewing machine electric control module controls master
Galvanic electricity machine is rotated, and starts sewing；When the leading edge for having sewing passes through front trimming induction apparatuss 19, then sewing machine electric control module controls
Front cutting facility action in sewing machine, suture is cut off, and generation is formed in the front pigtail at sewing leading edge；When there is sewing
When back edge passes through rear trimming induction apparatuss 16, then the rear cutting facility action in sewing machine electric control module controls sewing machine will seam
Line is cut off, and generation is formed in the rear line pigtail of sewing rear edge.In addition, can also offer positioned at needle plate tongue on the needle plate 1
Auxiliary cloth feeding alveolus 103 on front side of in the of 1, the auxiliary cloth feeding alveolus 103 extends along the longitudinal direction, and up and down through needle plate 1, auxiliary
Help work feed alveolus 103 hold auxiliary cloth feeding tooth to expose upwards, the auxiliary cloth feeding tooth in sewing machine does front-rear reciprocation movement, realizes auxiliary
Help work feed.
The thread shearing device of sewing machine for trimming action after execution includes the stationary knife 2 with stationary knife blade and for holding
The action of row trimming and the upper slitter 3 with upper slitter blade, after the upper slitter 3 performs trimming action, then upper slitter blade and stationary knife blade
Mutually occlusion, and form trimming blade 31 for suture is cut off, the trimming blade 31 be located at rear trimming induction apparatuss 16 rear,
Or both left and right alignment；In order to effectively shorten the length of rear line pigtail produced after trimming terminates, as illustrated in figs. 2 or 6, along seam
Machine of threading is fed forward the direction of cloth when sewing, i.e., along the direction of the feed dog work feed forward of sewing machine, the application by stationary knife 2,
Upper slitter 3, and the trimming blade 31 that formed after stationary knife 2 and upper slitter 3 are engaged all be arranged at 101 and of needle plate tongue on needle plate 1
Between the leading edge of needle plate 1.Therefore, stationary knife 2, upper slitter 3 and trimming blade 31 can have following several installation sites：
First, as shown in Fig. 1 or Fig. 5 or Fig. 7, on needle plate 1, offer the auxiliary cloth feeding alveolus on front side of needle plate tongue 101
103, stationary knife 2, upper slitter 3 and trimming blade 31 are all disposed between the needle plate tongue 101 on needle plate 1 and auxiliary cloth feeding alveolus 103,
Therefore stationary knife 2, upper slitter 3 and trimming blade 31 are all located at the front side of needle plate tongue 101, the rear side of auxiliary cloth feeding alveolus 103.
2nd, as shown in figure 8, without auxiliary cloth feeding alveolus 103 on needle plate 1, then stationary knife 2, upper slitter 3 and trimming blade 31 are all arranged
Between the leading edge of needle plate tongue 101 and needle plate 1 on needle plate 1, therefore stationary knife 2, upper slitter 3 and trimming blade 31 are all located at needle plate
The front side of tongue 101, the rear side of 1 leading edge of needle plate.
3rd, as shown in figure 9, the auxiliary cloth feeding alveolus 103 on front side of needle plate tongue 101 is offered on needle plate 1, stationary knife 2,
Upper slitter 3 and trimming blade 31 are all disposed between the leading edge of auxiliary cloth feeding alveolus 103 and needle plate 1, therefore stationary knife 2, upper slitter 3 and are cut
Line blade 31 is all located at the front side of auxiliary cloth feeding alveolus 103, the rear side of 1 leading edge of needle plate.
In above-mentioned thread shearing device of sewing machine, as stationary knife 2, upper slitter 3 and trimming blade 31 are all disposed within the pin on needle plate 1
Between the leading edge of plate tongue 101 and needle plate 1, in terms of existing technologies, the application is by stationary knife 2, upper slitter 3 and trimming blade
Direction of 31 position all to close needle plate tongue 101 is arranged backward, therefore, the application can be by the rear trimming induction apparatuss 16
Position also synchronously to arranging near the direction of needle plate tongue 101 backward, therefore rear trimming induction apparatuss 16 may be installed seam platform 17
Upper surface on, and positioned at the rear side of 1 leading edge of needle plate, rear trimming induction apparatuss 16 are more close to 101 He of needle plate tongue
Needle falling hole 102, in other words, the distance between rear trimming induction apparatuss 16 and needle plate tongue 101 in the longitudinal direction is compared to existing
Greatly shorten for technology.Now, after sewing terminates, in the application, rear trimming induction apparatuss 16 have detected sewing back edge and have led to
The time point crossed shifts to an earlier date compared to existing technologies so that thread shearing device of sewing machine perform after trimming action time point
Also shift to an earlier date, therefore draw diagonally forward or just suture has been cut off when pulling back and sewing cloth backward in workman, so as to be prevented effectively from every time
Sewing terminate after, thread shearing device of sewing machine perform trimming action before, workman just will sew cloth diagonally forward draw or it is past backward
Pull back and cause to leak the phenomenon cut.Further, after sewing terminates, the electric control module controls upper slitter 3 of sewing machine performs trimming
Action is mutually engaged with stationary knife 2, is cut off suture so as to pass through trimming blade 31, the minimum length of the rear line pigtail produced after trimming
For the distance between rear trimming induction apparatuss 16 and trimming blade 31 in the longitudinal direction, the application is by stationary knife 2, upper slitter 3 and trimming
The position of blade 31 is all arranged backward, the rear trimming induction apparatuss 16 being closer on needle plate 1, so as to trimming sensing after can shortening
Spacing between device 16 and trimming blade 31 in the longitudinal direction, greatly reduces the rear line produced by after cutting facility trimming terminates
The length of pigtail；When rear trimming induction apparatuss 16 are flushed with trimming blade 31 or so, then can accomplish the length of the rear line pigtail of generation
It is zero.
In the application, the mounting means of the stationary knife 2 and upper slitter 3 has three kinds of embodiments, respectively：Embodiment one, stationary knife 2
The needle plate 1 of sewing machine is installed on upper slitter 3 all, then stationary knife 2 and upper slitter 3 are made of one with needle plate 1；Embodiment two, stationary knife 2 and on
Knife 3 is all installed on the knife group fixed seat 13 of sewing machine；Embodiment three, stationary knife 2 and upper slitter 3 are all installed on the upper slitter of sewing machine and support
Seat 20.
Embodiment one, stationary knife 2 and upper slitter 3 are all installed on the needle plate 1 of sewing machine, now, as shown in Figures 1 to 4, the pin
There is on plate 1 the auxiliary cloth feeding portion 105 for being used to opening up the auxiliary cloth feeding alveolus 103, therefore auxiliary cloth feeding portion 105 is located at needle plate 1
Forward right side, the stationary knife 2 is screwed in the rear end face in the auxiliary cloth feeding portion 105 of needle plate 1, so as to stationary knife 2 is installed
On needle plate 1；Front side right edge of the needle plate 1 in the upper surface in auxiliary cloth feeding portion 105 is provided with a support ledge 104, institute
The upper surface for stating support ledge 104 is smooth arc surface, be supported by the support ledge 104 it is one rotatable, and prolong in front and back
The upper cutter shaft 4 stretched, the upper slitter 3 are fixed on the rear end of cutter shaft 4, so as to upper slitter 3 is arranged on needle plate 1, and are carried by needle plate 1
For supporting.Or, as shown in figure 9, the breach located on front side of auxiliary cloth feeding alveolus 103 is opened up on needle plate 1, stationary knife 2 is put
In indentation, there and it is screwed in needle plate 1, the support ledge 104 is located at the front side of breach, and this structure is to sewing machine
Key position change few, risk is low.
Preferably, as shown in figure 3, a back-up ring 5 for being located at 104 front side of support ledge, institute are fixed with the upper cutter shaft 4
State and on cutter shaft 4, be also cased with stage clip 6 axially extending before and after, front end and the back-up ring 5 of the stage clip 6 lean, after stage clip 6
End leans with support ledge 104, makes upper slitter 3 to after the direction rotation near stationary knife 2, upper slitter 2 by the pretightning force of stage clip 6
Upper slitter blade accurately can be engaged with the stationary knife blade of stationary knife 2, and then realizes trimming function exactly.For the ease of by back-up ring 5
In loading on cutter shaft 4, the back-up ring 5 is a split washer, and with upper cutter shaft 4 to be tightly fixed, therefore back-up ring 5 can be card
Spring.
As the upper cutter shaft 4 provides support by needle plate 1, therefore the diameter of upper cutter shaft 4 is less, and upper cutter shaft 4 is a slender axles,
Cause upper slitter 3 be engaged trimming with stationary knife 2 exactly to effectively prevent elongated upper cutter shaft 4 from bending, deforming etc.
Phenomenon, it is as shown in figure 1, the thread shearing device of sewing machine is also including the connecting shaft 8 extended before and after a support base 7 and, described
Connecting shaft 8 is rotatably supported in support base 7, and the support base 7 is fixed in the casing of sewing machine, the connecting shaft 8
Rear end is connected by Hooks coupling universal coupling 9 with the front end of the upper cutter shaft 4, and the connecting shaft 8 is driven by a trimming driving source 10
Rotate.The axial length of upper cutter shaft 4 can effectively be shortened by said structure, and then it is existing to avoid cutter shaft 4 from bending, deformation etc. occur
As, it is ensured that upper slitter 3 and stationary knife 2 can be engaged exactly to be cut off suture, improves trimming reliability and stability.In addition, above-mentioned
Structure can conveniently realize the concentric installation between cutter shaft 4 and connecting shaft 8, i.e.,：First by upper cutter shaft 4, upper slitter 3, needle plate 1 and fixed
Knife 2 loads after assembling in sewing machine, then loads in sewing machine, finally by upper slitter after connecting shaft 8 and trimming driving source 10 are assembled
Axle 4 is connected using Hooks coupling universal coupling 9 with connecting shaft 8；As mismachining tolerance and needle plate 1 need to adjust when assembling, therefore upper cutter shaft 4
Can not ensure well and connecting shaft 8 between with one heart, after being connected upper cutter shaft 4 and connecting shaft 8 by Hooks coupling universal coupling 9, can be very
Eliminate well the problem brought by the concentricity between cutter shaft 4 and connecting shaft 8, it is ensured that 3 trimming accuracy of action of upper slitter, also
Easily can realize carrying out effective support to upper cutter shaft 4 and connecting shaft 8.
The trimming driving source 10 can be motor, and direct or indirect drive connection axle 8 turns an angle；The trimming
Driving source 10 can also be an electric magnet, and indirect drive connection axle 8 turns an angle.In the present embodiment, the trimming drives
Source 10 adopts electric magnet, now, as shown in figure 1, the electric magnet has the electromagnet core that can be extended downwardly from, the sewing machine
Cutting facility also includes the right-hand member of trimming crank 11 and the crank axle 12 for extending in front and back, the electromagnet core and trimming crank 11
It is connected by crank axle 12, the connecting shaft 8 is fixed in the left end of trimming crank 11.During trimming, electric magnet is powered, electromagnetism
Ferrum iron core is extended downwardly from, drive the right-hand member of trimming crank 11 centered on the axis of connecting shaft 8 line and to lower swing, and then drive
Connecting shaft 8 turns over certain angle, and connecting shaft 8 drives upper cutter shaft 4 and upper slitter 3 synchronously to turn an angle, makes upper slitter 3 and determine
Knife 2 is engaged, and cuts off suture.
Embodiment two, stationary knife 2 and upper slitter 3 are all installed on the knife group fixed seat 13 of sewing machine, now, such as Fig. 5 and Fig. 6 institutes
Show, the thread shearing device of sewing machine also includes the stationary knife mounting seat 14 being fixed in the knife group fixed seat 13 of sewing machine, described fixed
Knife 2 is fixed on the stationary knife mounting seat 14, and the upper slitter 3 is fixed on the rear end of cutter shaft 4, and upper cutter shaft 4 is rotatably supported at
In knife group fixed seat 13.As the knife group fixed seat 13 of sewing machine is that upper cutter shaft 4 provides support, therefore upper cutter shaft 4 is relatively large in diameter,
Suitably upper cutter shaft 4 can be done and slightly do length, and cause knife group fixed seat 13 to support the strong point of upper cutter shaft 4 to be located at upper cutter shaft 4
Middle, therefore, directly trimming driving source 10 can be connected with the front end of upper cutter shaft 4, direct or indirect drive connection axle 8
Turn an angle.In the same manner, trimming driving source 10 can be motor or electric magnet, when trimming driving source 10 is electric magnet, cut
Line driving source 10 passes through the trimming crank 11 and crank axle 12 drives upper cutter shaft 4 to rotate.
Embodiment three, stationary knife 2 and upper slitter 3 are all installed on the upper slitter support base 20 of sewing machine, now, such as Fig. 7 or Fig. 8 institutes
Show, upper slitter support base 20 and needle plate 1 are two separate parts, the upper slitter support base 20 is screwed in needle plate
1 right flank, the stationary knife 2 are fixed on the rear end face of upper slitter support base 20, and the upper slitter 3 is fixed on the rear end of cutter shaft 4,
Upper cutter shaft 4 is rotatably supported in upper slitter support base 20.Now, upper cutter shaft 4 also be a slender axles, therefore with one phase of embodiment
Together, need also exist for arranging back-up ring 5, stage clip 6, Hooks coupling universal coupling 9, and the connecting shaft 8 for being connected with trimming driving source 10.
Further, the upper slitter blade in the thread shearing device of sewing machine, on the stationary knife blade and upper slitter 3 of the stationary knife 2
All extend along cloth-feeding direction perpendicular to sewing machine or so；In addition, the section of the upper slitter 3 is generally V-shaped, 3 lower end of upper slitter
Tip form the upper slitter blade.As shown in Figure 2 and Figure 4, the line excessively for extending in front and back is offered on the upper surface of the stationary knife 2
Groove 21, is easy to line pigtail to be smoothly through this position, it is to avoid line pigtail is stuck, blocks.
Preferably, as shown in Fig. 3, Fig. 4 and Fig. 6, formed between the front end of the needle plate tongue 101 and the rear end of stationary knife 2
Have the line of fall gap 15 of up/down perforation, be provided with rear side of 2 upper surface of the stationary knife tilt to obliquely it is oblique at line of fall gap 15
Support face 22, the back edge in the diagonal brace face 22 form the stationary knife blade, and the stationary knife blade is less than needle plate tongue 101, by being engaged
Stationary knife blade and the trimming blade 31 that formed of upper slitter blade be located at the lower section of needle plate tongue 101；The diagonal brace face 22
Front end flush with the upper surface of stationary knife 2, the upper surface of stationary knife 2 is flushed with the upper surface of needle plate 1 or the slightly below upper end of needle plate 1
Face, is smoothly through in order to sew cloth.By line of fall gap 15, diagonal brace face 22, and the installation site of stationary knife blade can make seam
The suture after terminating of threading can fall on diagonal brace face 22, therefore after the position of trimming blade 31 is moved down exactly, can be accurate
Ground is cut off by the suture supported by diagonal brace face 22.
Further, after sewing terminates, then after trimming induction apparatuss 16 detect grey sheeting split pass through, and rear trimming induction apparatuss
16 are no longer sew cloth covers, and now, the eedle of the electric control module controls sewing machine of the sewing machine is walked after N pins again, makes institute
State upper slitter 3 and perform trimming action, N≤0.As N=0, then after illustrating sewing just forward past rear trimming induction apparatuss 16,
Upper slitter 3 just rotates down shearing suture, and line pigtail is shortest length.But, some producers define the length of line pigtail, then can pass through
The size of N is set obtaining corresponding line pigtail length, N=1,2,3 ...；When after trimming induction apparatuss 16 detected sewing just forward
More later after trimming induction apparatuss 16, the eedle of sewing machine is made to be walked after N pins again, upper slitter 3 just rotates down shearing suture, then line pigtail
Length be distance (i.e. the shortest length of line pigtail)+machine between trimming blade 31 and rear trimming induction apparatuss 16 in the longitudinal direction
The line pigtail length formed by pin walking N pins, so as to reach the purpose of line pigtail length after control, N is bigger, and produced rear line pigtail is long
Degree is longer.
In the same manner, when current trimming induction apparatuss 19 detect grey sheeting split and pass through, the electric control module controls sewing machine of sewing machine
Eedle walked after M pins again, the made front cutting facility of sewing machine performs trimming action, and the length of front pigtail is controlled with this；M gets over
Greatly, produced front pigtail length is shorter.
In sum, stationary knife 2, upper slitter 3 and trimming blade 31 are all arranged at the application the needle plate tongue 101 on needle plate 1
After and the leading edge of needle plate 1 between, it is substantially shorter between trimming blade 31 and rear trimming induction apparatuss 16 in the longitudinal direction
Distance, and trimming blade 31 and needle plate 1 on needle falling hole 102 between in the longitudinal direction apart from L, cut so as to greatly reduce
Line apparatus trimming terminate after produced by line pigtail length, can especially be prevented effectively from after every time sewing terminates, in sewing machine trimming
Before device performs trimming action, workman just will sew cloth and draw diagonally forward or cause to leak the phenomenon cut toward pulling back backward.
So, this utility model effectively overcomes various shortcoming of the prior art and has high industrial utilization.
Above-described embodiment only illustrative principle of the present utility model and its effect are new not for this practicality is limited
Type.Any person skilled in the art all can be carried out to above-described embodiment under without prejudice to spirit and the scope of the present utility model
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the essence disclosed in this utility model
All equivalent modifications completed under god and technological thought or change, should be covered by claim of the present utility model.
Claims (12)
1. a kind of thread shearing device of sewing machine, the sewing machine include the needle plate with needle plate tongue (101) (1), it is characterised in that：
The thread shearing device of sewing machine includes the stationary knife with stationary knife blade (2) and for performing trimming action and with upper slitter blade
Upper slitter (3), the upper slitter blade is mutually engaged with stationary knife blade, and form trimming blade (31) for suture is cut off；Along seam
Machine of threading is fed forward the direction of sewing, needle plate tongue (101) and pin of the trimming blade (31) on needle plate (1) when sewing
Between the leading edge of plate (1).
2. thread shearing device of sewing machine according to claim 1, it is characterised in that：Offer positioned at pin on the needle plate (1)
Auxiliary cloth feeding alveolus (103) on front side of plate tongue (101), needle plate tongue of the trimming blade (31) on needle plate (1)
(101) and auxiliary cloth feeding alveolus (103) between.
3. thread shearing device of sewing machine according to claim 1, it is characterised in that：Offer positioned at pin on the needle plate (1)
Auxiliary cloth feeding alveolus (103) on front side of plate tongue (101), auxiliary cloth feeding tooth of the trimming blade (31) on needle plate (1)
Between the leading edge of groove (103) and needle plate (1).
4. the thread shearing device of sewing machine according to any one of claim 1-3, it is characterised in that：The upper end of the needle plate (1)
Face is provided with a support ledge (104), and the stationary knife (2) is fixed on needle plate (1), and the upper slitter (3) extends before and after being fixed on one
Upper cutter shaft (4) on, the upper cutter shaft (4) is rotatably supported in the support ledge (104) of needle plate (1).
5. thread shearing device of sewing machine according to claim 4, it is characterised in that：A gear is fixed with the upper cutter shaft (4)
Circle (5), is also cased with a stage clip (6) on the upper cutter shaft (4), the rear and front end of the stage clip (6) respectively with the back-up ring (5) and
Support ledge (104) leans, the pretightning force of the stage clip (6) makes upper slitter (3) to after rotating near the direction of stationary knife (2), on
The upper slitter blade of knife (3) is mutually engaged with the stationary knife blade of stationary knife (2).
6. thread shearing device of sewing machine according to claim 4, it is characterised in that：Before and after also including a support base (7) and
The connecting shaft (8) of extension, the connecting shaft (8) are rotatably supported in support base (7), the connecting shaft (8) with it is described on
Cutter shaft (4) is connected by Hooks coupling universal coupling (9), and the connecting shaft (8) is driven by a trimming driving source (10) and rotated.
7. thread shearing device of sewing machine according to claim 6, it is characterised in that：The trimming driving source (10) is an electromagnetism
Ferrum, the electric magnet have the electromagnet core that can be extended downwardly from, also including trimming crank (11) and the crank axle for extending in front and back
(12), the electromagnet core is connected by crank axle (12) with one end of trimming crank (11), and the connecting shaft (8) is fixed
In the other end of trimming crank (11).
8. the thread shearing device of sewing machine according to any one of claim 1-3, it is characterised in that：Also include being fixed on sewing machine
Knife group fixed seat (13) on stationary knife mounting seat (14), the stationary knife (2) is fixed on the stationary knife mounting seat (14), it is described on
Knife (3) is fixed on the upper cutter shaft (4) extended before and after, and the upper cutter shaft (4) is rotatably supported at knife group fixed seat (13)
In.
9. the thread shearing device of sewing machine according to any one of claim 1-3, it is characterised in that：The upper end of the stationary knife (2)
The line groove (21) excessively for extending in front and back is offered on face.
10. the thread shearing device of sewing machine according to any one of claim 1-3, it is characterised in that：The needle plate tongue (101)
Front end and the rear end of stationary knife (2) between be formed with the line of fall gap (15) of up/down perforation, the rear side of stationary knife (2) upper surface
The diagonal brace face (22) for tilting to line of fall gap (15) place obliquely is provided with, the back edge in the diagonal brace face (22) forms the stationary knife knife
Sword, the stationary knife blade are less than needle plate tongue (101), the thread trimmer formed by the stationary knife blade and upper slitter blade that are engaged
Lower section of the sword (31) positioned at needle plate tongue (101).
11. thread shearing device of sewing machine according to claim 1, it is characterised in that：The stationary knife blade of the stationary knife (2) and upper
Upper slitter blade on knife (3) all extends along cloth-feeding direction perpendicular to sewing machine or so.
12. thread shearing device of sewing machine according to claim 1, it is characterised in that：Also include being installed on sewing machine seam platform
(17) the rear trimming induction apparatuss (16) on, the rear trimming induction apparatuss (16) are connected with the electronic control module of sewing machine；When after trimming
When induction apparatuss (16) detect grey sheeting split by rear trimming induction apparatuss (16), the electric control module controls sewing machine of the sewing machine
Eedle is walked after N pins again, makes the upper slitter (3) perform trimming action, N≤0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621103236.9U CN206127623U (en) | 2016-10-08 | 2016-10-08 | Thread shearing device of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621103236.9U CN206127623U (en) | 2016-10-08 | 2016-10-08 | Thread shearing device of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206127623U true CN206127623U (en) | 2017-04-26 |
Family
ID=58571888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621103236.9U Active CN206127623U (en) | 2016-10-08 | 2016-10-08 | Thread shearing device of sewing machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN206127623U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916507A (en) * | 2016-10-08 | 2018-04-17 | 杰克缝纫机股份有限公司 | A kind of thread shearing device of sewing machine |
| CN108239826A (en) * | 2018-03-16 | 2018-07-03 | 无锡品益缝纫机有限公司 | The control method of sewing machine automatic shearing |
| CN108677398A (en) * | 2018-05-31 | 2018-10-19 | 杰克缝纫机股份有限公司 | A kind of sewing machine trimming control method and mechanism and overedger |
| CN108823839A (en) * | 2018-06-12 | 2018-11-16 | 杰克缝纫机股份有限公司 | A kind of overseam trimming control method and structure |
| CN108866846A (en) * | 2018-06-12 | 2018-11-23 | 杰克缝纫机股份有限公司 | A kind of sewing machine trimming control method and mechanism and overedger |
| TWI794419B (en) * | 2019-02-23 | 2023-03-01 | 曾賢長 | Positioning device for a movable tongue seat with rotating motion |
-
2016
- 2016-10-08 CN CN201621103236.9U patent/CN206127623U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916507A (en) * | 2016-10-08 | 2018-04-17 | 杰克缝纫机股份有限公司 | A kind of thread shearing device of sewing machine |
| CN107916507B (en) * | 2016-10-08 | 2023-10-31 | 杰克科技股份有限公司 | Thread cutting device of sewing machine |
| CN108239826A (en) * | 2018-03-16 | 2018-07-03 | 无锡品益缝纫机有限公司 | The control method of sewing machine automatic shearing |
| CN108677398A (en) * | 2018-05-31 | 2018-10-19 | 杰克缝纫机股份有限公司 | A kind of sewing machine trimming control method and mechanism and overedger |
| CN108823839A (en) * | 2018-06-12 | 2018-11-16 | 杰克缝纫机股份有限公司 | A kind of overseam trimming control method and structure |
| CN108866846A (en) * | 2018-06-12 | 2018-11-23 | 杰克缝纫机股份有限公司 | A kind of sewing machine trimming control method and mechanism and overedger |
| TWI794419B (en) * | 2019-02-23 | 2023-03-01 | 曾賢長 | Positioning device for a movable tongue seat with rotating motion |
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Address after: 318010 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. |