CN101812779B - Wire shearing device of sewing machine - Google Patents
Wire shearing device of sewing machine Download PDFInfo
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- CN101812779B CN101812779B CN2010101252656A CN201010125265A CN101812779B CN 101812779 B CN101812779 B CN 101812779B CN 2010101252656 A CN2010101252656 A CN 2010101252656A CN 201010125265 A CN201010125265 A CN 201010125265A CN 101812779 B CN101812779 B CN 101812779B
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- 238000009958 sewing Methods 0.000 title claims abstract description 43
- 238000010008 shearing Methods 0.000 title abstract 2
- 238000006073 displacement reaction Methods 0.000 claims abstract description 84
- 230000001815 facial effect Effects 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 description 16
- 230000009471 action Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 2
- 238000013213 extrapolation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
- D05B65/02—Devices for severing the needle or lower thread controlled by the sewing mechanisms
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
- D05B37/04—Cutting devices
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
This invention provides a wire shearing device of sewing machine, includes: a suture tension adjusting unit (33) arranged on the upside of the sewing machine body (32) and providing either a tension clamping state or a clamping release state by means of shifting to the position of a clamping facial line (A) and a bottom line (C); a movable blade (35) moves forward and backward under the needle board (34) and shears the facial wire (A) and bottom wire(C); A swing arm (38), of which One end part is freely connected to the sewing machine body by means of angular displacement; a driven wheel (37) is connected between the other end and one end of the swing arm (38); a long hole (39) is formed in the cam part (40) , thereof , the swing arm (38) finishes an angular displacement from one direction to another direction through the displacement of the cam part (40) ; a first connection unit (42) transmits the displacement of the other end of the swing arm (38) to the suture tension adjusting unit (33) and a second connection unit (43) transmits the drive force of drive unit (41) to the movable blade (35) so as to drive it forward or backward.
Description
Technical field
The present invention relates to the cutting facility of Sewing machines.
Background technology
Fig. 6 is the perspective view of the structure of the cutting facility 1 of the Sewing machines of expression prior art.The prior art for example is documented in Japanese Utility Model and logins in No. 3136842 communique.The cutting facility 1 of the Sewing machines of prior art adopts following structure: an end of universal driving shaft 5 is connected on the piston rod 3 of pneumatic cylinder 2 by contiguous block 4, upper thread and bottom line are clipped in by being fixed on cam part 6 on these universal driving shaft 5 the other end the thread tension adjusting apparatus (not expression among the figure) that is called as " upper thread retainer " is upper gives desirable tension force to it, and remove the tension force that this clamp position discharges upper thread (Needles yarn) and bottom line (Le one パ yarn), the movable blade 12 that is arranged on the following approximate C word shape of needle plate (not expression among the figure) is moved synchronously towards arrow B 1 with above-mentioned universal driving shaft 5, upper thread and bottom line are cut off in the deflection displacement of B2.
The axis of above-mentioned universal driving shaft 5 is parallel with the axis of the piston rod 3 of above-mentioned pneumatic cylinder 2.And above-mentioned pneumatic cylinder 2 utilizes the single action pneumatic cylinder to realize, utilizes air pressure that piston rod 3 is retreated towards the direction of arrow A 1, utilizes the elastic force that recovers spring 2a that piston rod 3 is protracted towards the direction of arrow A 2.
An end that is connecting push rod 7 on the above-mentioned contiguous block 4, an end of the 1st swing arm 9 is connected on the other end of above-mentioned push rod 7 by the 1st pin 8.One end of blade drive rod 11 is connected on the other end of above-mentioned the 1st swing arm 9 by the 2nd pin 10, and above-mentioned movable blade 12 utilizes 13 angular displacements of the 3rd pin freely to be connected on the other end of above-mentioned blade drive rod 11.
The mid portion of above-mentioned the 1st swing arm 9 is supported on the body of Sewing machines with the 4th pin 14 pivots, when above-mentioned piston rod 3 retreats towards the direction of arrow A 1, above-mentioned the 1st swing arm 9 is pushed movable blade 12 by blade drive rod 11 and is advanced towards the direction of arrow B 1 around the axis angle displacement of the 4th pin 14.And when above-mentioned piston rod 3 stretched out towards the direction of arrow A 2, above-mentioned the 1st swing arm 9 retreated by the direction of blade drive rod 11 pulling movable blade 12 towards arrow B 2 around the in the opposite direction angular displacement of axis of above-mentioned the 4th pin 14.Above-mentioned movable blade 12 usefulness the 5th pin 15 pivots like this be bearing in above-mentioned needle plate below.
Above-mentioned cam part 6 is made of the tabular parts of strip shape with the extension of above-mentioned universal driving shaft 5 almost parallel ground, is formed with the 1st and the 2nd cam surface 6a, 6b on top.Above-mentioned the 1st cam surface 6a is inclined upwardly and forms towards the direction of arrow A 2.And above-mentioned the 2nd cam surface 6b is from the upper end horizontal-extending of the 1st cam surface 6a and form.
Be arranged on the support 16 that is fixed on the above-mentioned sewing machine main body back side to above-mentioned pneumatic cylinder 2 approximate horizontal, support the bottom of frame 17 to be fixed on the above-mentioned support 16.The central part of the 2nd swing arm 19 freely is connected on the upper end of above-mentioned support frame 17 with the horizontal axis swing of the 6th pin 18 around above-mentioned the 6th pin 18.Be provided with the driven pulley (ホ ロ ア) 20 that is guided by the above-mentioned the 1st and the 2nd cam surface 6a, 6b in an end of the 2nd swing arm 19.And, sell 21 along an end that is configured in the below of the connecting rod 23 of upper downward-extension with the 7th and be connected on the other end of above-mentioned the 2nd swing arm 19.The the above-mentioned the 6th and the 7th pin 18,21 is realized by cotter bolt.
The other end that is configured in the top of above-mentioned connecting rod 23 is connected on the above-mentioned thread tension adjusting apparatus, rise and descend towards the direction of arrow C 2 towards the direction of arrow C 1 by connecting rod 23, can switch above-mentioned thread tension adjusting apparatus to the clamp position of upper thread and bottom line and the disarm state of having removed this clamp position.
Such cutting facility 1 flexibly is clamped in upper thread and bottom line in the process of making gives suitable tension force in the above-mentioned thread tension adjusting apparatus, when making action when stopping, remove the clamp position of upper thread and bottom line and tension force when discharging above-mentioned the making of upper thread and bottom line, relax, prevent to cut off on inappropriate opportunity upper thread and bottom line when movable blade 12 makes upper thread and bottom line when the direction of arrow B 1 is advanced.
The cutting facility 1 of the Sewing machines of above-mentioned prior art is owing to adopt the 1st and the 2nd cam surface 6a that forms with cam part 6 tops, the 6b carrying is arranged on the driven pulley 20 on the 2nd swing arm 19 1 ends, by making cam part 6 towards arrow A 1, the direction of A2 moves to make connecting rod 23 towards arrow C 1, the structure that the direction of C2 moves up and down, even therefore form the 1st and the 2nd cam surface 6a with desirable angle of inclination at above-mentioned cam part 6,6b is in order to remove above-mentioned thread tension adjusting apparatus to the clamp position of upper thread and bottom line in movable blade 12 in progressive way, the side of arrow B 1, driven pulley 20 is followed swimmingly, and existence can not be removed thread tension adjusting apparatus to the such problem of the clamp position of upper thread and bottom line the most appropriate opportunity in movable blade 12 is advanced the way towards the direction of arrow B 1.
Summary of the invention
Purpose of the present invention is exactly that a kind of cutting facility that can remove the most appropriate opportunity in movable blade is advanced the way the Sewing machines of the clamp position of upper thread and bottom line will be provided.
The cutting facility of Sewing machines of the present invention is characterised in that and comprises: the thread tension adjustment unit, be arranged on the top of sewing machine main body, can switch to clamping upper thread and bottom line and give the clamp position of above-mentioned upper thread and bottom line tension and removed any state in the clamping disarm state of this clamp position; Movable blade towards advancing near the direction of needle downing position and retreating towards the direction of leaving above-mentioned needle downing position, is cut off above-mentioned upper thread and bottom line below needle plate; Swing arm, an end angular displacement freely is connected on the above-mentioned sewing machine main body, and the middle part between the other end and an above-mentioned end is provided with driven pulley; Cam part, be formed with the slotted hole that above-mentioned driven pulley freedom of movement ground embeds, utilize this cam part to make above-mentioned swing arm to a deflection displacement towards the displacement of a direction, utilize the displacement to another way of this cam part to make above-mentioned swing arm to another deflection displacement; Drive division makes above-mentioned cam part towards an above-mentioned direction and above-mentioned another direction displacement; The 1st connecting portion, the displacement of the other end of above-mentioned swing arm is passed to above-mentioned thread tension adjustment unit, above-mentioned thread tension adjustment unit is moved to above-mentioned clamping disarm state from above-mentioned clamp position, above-mentioned thread tension adjustment unit is moved to above-mentioned clamp position from above-mentioned clamping disarm state; And the 2nd connecting portion, the driving force of above-mentioned drive division is passed to above-mentioned movable blade, make the ground displacement that moves forward and backward of above-mentioned movable blade.
If employing the present invention, owing to be provided with driven pulley in an end of swing arm and the middle part between the other end, under the state in the slotted hole that this driven pulley freedom of movement ground is embedded cam part, can utilize cam part to make swing arm towards a deflection displacement towards the displacement of a direction, utilize cam part displacement to another way to make to another way angular displacement of swing arm, therefore can make driven pulley follow above-mentioned slotted hole towards the displacement of a direction and another direction according to cam part, can be in the process of movable blade forward motion be about to push away optimum position before expanding upper thread corresponding opportunity with upper thread rotating shuttle peripheral part, remove the thread tension adjustment unit to the clamp position of upper thread and bottom line.
The present invention preferably is formed with in the interior perimembranous that faces above-mentioned slotted hole of above-mentioned cam part: when above-mentioned cam part guides the 1st cam surface of above-mentioned driven pulley and guides the 2nd cam surface of above-mentioned driven pulley when above-mentioned cam part when above-mentioned another direction moves when an above-mentioned direction moves.
If employing the present invention, owing in above-mentioned slotted hole, form the 1st cam surface and the 2nd cam surface, so energy the enough the 1st and the 2nd cam surface makes effectively, and driven pulley is followed, displacement, can be in the process of movable blade forward motion be about to push away optimum position before expanding upper thread corresponding opportunity with upper thread rotating shuttle peripheral part, remove the thread tension adjustment unit to the clamp position of upper thread and bottom line.
The cutting facility of Sewing machines of the present invention is characterised in that and comprises: the thread tension adjustment unit, be arranged on the top of sewing machine main body, can switch to clamping upper thread and bottom line and give the clamp position of above-mentioned upper thread and bottom line tension and removed any state in the clamping disarm state of this clamp position; Movable blade towards advancing near the direction of needle downing position and retreating towards the direction of leaving above-mentioned needle downing position, is cut off above-mentioned upper thread and bottom line below needle plate; Driven pulley; The driven pulley guide member, be fixed on the above-mentioned sewing machine main body, be provided with and allow above-mentioned driven pulley towards the 1st direction with the 2nd direction displacement of the 1st opposite direction and stop above-mentioned driven pulley towards the driven pulley guide portion of the direction displacement that intersects with above-mentioned the 1st direction and the 2nd direction; Cam part, be formed with the slotted hole that above-mentioned driven pulley freedom of movement ground embeds, utilize this cam part to make above-mentioned driven pulley towards above-mentioned the 1st direction displacement towards the displacement along an above-mentioned crisscross direction, and utilize this cam part to make above-mentioned driven pulley towards above-mentioned the 2nd direction displacement towards the displacement along above-mentioned crisscross another direction; Drive division makes above-mentioned cam part towards an above-mentioned direction and above-mentioned another direction displacement; The 1st connecting portion, the displacement of above-mentioned driven pulley is passed to above-mentioned thread tension adjustment unit, above-mentioned thread tension adjustment unit is moved to above-mentioned clamping disarm state from above-mentioned clamp position, above-mentioned thread tension adjustment unit is moved to above-mentioned clamp position from above-mentioned clamping disarm state; And the 2nd connecting portion passes to above-mentioned movable blade with the driving force of above-mentioned drive division, above-mentioned movable blade is advanced and retreats the ground displacement.
If employing the present invention, owing to can allow driven pulley towards the displacement of the 1st direction and the 2nd direction by enough driven pulley guide members, and the displacement of the direction that prevention driven pulley court and the 1st and the 2nd direction are intersected, under the state in the slotted hole that driven pulley freedom of movement ground is embedded cam part, can utilize cam part to make above-mentioned driven pulley towards above-mentioned the 1st direction displacement towards the displacement of a direction, utilize cam part displacement to another way to make above-mentioned driven pulley towards above-mentioned the 2nd direction displacement, therefore can make driven pulley follow above-mentioned slotted hole towards the displacement of a direction and another direction according to cam part, can be in the process of movable blade forward motion be about to push away optimum position before expanding upper thread corresponding opportunity with upper thread rotating shuttle peripheral part, remove the thread tension adjustment unit to the clamp position of upper thread and bottom line.
Description of drawings
Purpose of the present invention, characteristic and advantage should be clearer and more definite from following detailed explanation and accompanying drawing.
Fig. 1 is the system diagram of the structure of the cutting facility of the Sewing machines of an example of expression the present invention;
Fig. 2 is the decomposition diagram of the cutting facility of Sewing machines;
Fig. 3 is the perspective view that is provided with the Sewing machines of cutting facility;
Fig. 4 A～Fig. 4 E is the key diagram of action that the cutting facility of Sewing machines is described, Fig. 4 A represents the state of movable blade before being about to enter in the wire loop of right side line; Fig. 4 B represents that right side line is pushed away the state that expands by the peripheral part of upper thread rotating shuttle; Fig. 4 C represents that right side line can not be resisted upper thread rotating shuttle peripheral part fully to the expansion power that pushes away of width both sides and the state cut off, Fig. 4 D represent right side line, central upper thread and left side line can not resist fully the upper thread rotating shuttle to extrapolation expansion power and being cut off, the peripheral part that bottom line is crossed the upper thread rotating shuttle embeds the state of thread cutter blade, and Fig. 4 E represents that movable blade normally enters the state in each wire loop of upper thread and bottom line;
Fig. 5 is the decomposition diagram of the structure of the cutting facility of the Sewing machines of other examples of expression the present invention;
Fig. 6 is the perspective view of the structure of the cutting facility of the Sewing machines of expression prior art.
The specific embodiment
Describe preferred example of the present invention in detail below with reference to accompanying drawing.
Fig. 1 is the system diagram of the structure of the cutting facility 30 of the Sewing machines of an example of expression the present invention, Fig. 2 is the decomposition diagram of the cutting facility 30 of Sewing machines, and Fig. 3 is the perspective view that is provided with the spininess dual ring sewing machine (many Needles Ring Sew い ミ シ Application) 31 of cutting facility 30.
The cutting facility 30 of the Sewing machines of this example comprises thread tension adjustment unit 33, movable blade 35, swing arm 38, cam part 40, drive division 41, the 1st connecting portion 42 and the 2nd connecting portion 43.
Spininess dual ring sewing machine 31 adopts above-mentioned thread tension adjustment unit 33 to be arranged on the top of sewing machine main body 32, can switch to the structure of any state in the following state: clip the clamp position that many (this example is 3) upper thread A1, A2, A3 (being written as " upper thread A " during general name), upper ornamental thread (upper Ornaments り yarn) B and bottom line C give each upper thread A, upper ornamental thread B and bottom line C tension force, and the clamping disarm state of having removed this clamp position.
Above-mentioned movable blade 35 direction (following sometimes be written as " direction of advance B11 ") towards the arrow B 11 of the position P that falls near pin below needle plate 34 is advanced, and retreat towards the direction (following sometimes be written as " direction of retreat B12 ") of leaving the arrow B 12 of above-mentioned needle downing position P, thereby cut off above-mentioned upper thread A and bottom line C.
One end of above-mentioned swing arm 38 freely is connected on the above-mentioned sewing machine main body 32 with 36 angular displacements of the 1st pin, and the middle part between the other end and an above-mentioned end is provided with driven pulley 37.
Form the slotted hole 39 that above-mentioned driven pulley 37 freedoms of movement ground embeds at above-mentioned cam part 40, by the displacement of above-mentioned cam part 40 towards the direction of arrow A 11, make above-mentioned swing arm 38 upwards angular displacements; By the displacement of above-mentioned cam part 40 towards the direction of arrow A 12, make above-mentioned swing arm 38 downward angular displacements.
Above-mentioned the 1st connecting portion 42 passes to above-mentioned thread tension adjustment unit 33 with the displacement of above-mentioned swing arm 38 the other end, above-mentioned thread tension adjustment unit 33 is moved to above-mentioned clamping disarm state from above-mentioned clamp position, above-mentioned thread tension adjustment unit 33 is moved to above-mentioned clamp position from above-mentioned clamping disarm state.
Above-mentioned the 2nd connecting portion 43 passes to above-mentioned movable blade 35 with the driving force of above-mentioned drive division 41, thereby makes above-mentioned movable blade 35 towards advancing direction B11 and direction of retreat B12 angular displacement.
Above-mentioned thread tension adjustment unit 33 comprises a plurality of (this example is 5) clamper 51 that substrate 50 and devices spaced apart on the longitudinally vertical with drawing Fig. 1 substrate 50 arrange.Each clamper 51 comprises: be fixed on the tubular retention tab 52 on the aforesaid substrate 50; Be installed on the retention tab 52, be provided with pass retention tab 52 and inwards side-prominent clamping remove the operating sheet 54 of pin 53; Be folded between operating sheet 54 and the retention tab 52, use the chucking power clamping upper thread A corresponding with the operational ton of aforesaid operations sheet 54, upper ornamental thread B and bottom line C, thereby give a pair of holding piece 55a, the 55b of upper thread A, upper ornamental thread B and the desirable tension force of bottom line C; Be installed on the retention tab 52, formed respectively the suture guiding sheet 57 of interspersed through hole 56a, 56b of each upper thread A of a pair of confession, upper ornamental thread B and bottom line C.
On same of aforesaid substrate 50, be provided with integratedly the suture inserting hole 58a that is formed with each upper thread A of each a pair of confession, upper ornamental thread B and bottom line C and passes respectively, the drawing lines guide portion 59 of 58b.Each upper thread A, upper ornamental thread B and bottom line C are wound up on the reel spool or bobbin that does not have expression among the figure, these upper threads A, upper ornamental thread B and bottom line C pass each suture inserting hole 58a, 58b of above-mentioned drawing lines guide portion 59, a suture inserting hole 58a who passes each suture guiding sheet 57 from a surperficial side is one rear flank to the inside, and one side is passed another suture inserting hole 58b to a surperficial side from the inside.
Pass each suture inserting hole 58a of above-mentioned drawing lines guide portion 59, each upper thread A of 58b, upper ornamental thread B and bottom line C from the inside one side pass a through hole 56a of each suture guiding sheet 57 to a surperficial side, through each holding piece 55a, between the 55b from a surperficial side pass another through hole 56b to the inside one side, pass respectively a plurality of (in this example being 5) the drawing lines guide member 61 that is arranged on sewing machine main body 32 tops, 62,63,64, the through hole that forms on 65, each upper thread A pierces in the through wires hole of each pin S, and upper ornamental thread B pierces in the through hole 67 of drawing lines metalwork (yarn road gold utensil) 66.
And, above-mentioned bottom line C passes suture inserting hole 58a, the 58b of drawing lines guide portion 59, one side is passed a through hole 56a of suture guiding sheet 57 to a surperficial side from the inside, between holding piece 55a, 55b, from a surperficial side pass another through hole 56b to the inside one side, import loopers 75 from bottom line flaccid part 69 through bottom line guide plates 70,71,72,73,74.
Above-mentioned cam part 40 is facing the interior perimembranous of above-mentioned slotted hole 39, A12 forms from reclinate the 1st cam surface 81 parallel to each other of horizontal direction and the 2nd cam surface 82 to another way, described the 1st cam surface 81 guides above-mentioned driven pulley 37 at above-mentioned cam part 40 when an above-mentioned direction A11 moves, described the 2nd cam surface 82 guides above-mentioned driven pulley 37 at above-mentioned cam part 40 when above-mentioned another direction A12 moves.
Above-mentioned drive division 41 has: o 83; Be fixed on the connector 85 on the plunger 84 of this o 83; One end is fixed on the connecting axle 86 on the connector 85; Be fixed on the contiguous block 87 on connecting axle 86 the other end; One end is fixed on the universal driving shaft 88 on the contiguous block 87; Intert for universal driving shaft 88, make universal driving shaft 88 along axis direction towards arrow A 11, the direction freedom of movement ground of A12 keeps the guide member 89 of universal driving shaft 88 the other end; Keep above-mentioned o 83 and universal driving shaft 88, be fixed on the support 79 at sewing machine main body 32 back sides.
Be equipped with to give the recurrence secondary spring 100 that makes the elastic force that this universal driving shaft 88 returns from the state that driven by o 83 towards the direction displacement of arrow A 11 to the direction towards arrow A 12 on the above-mentioned universal driving shaft 88.
Above-mentioned the 1st connecting portion 42 has the end that is configured in the below and freely is connected to the 1st attaching parts 94, one ends on the other end of above-mentioned swing arm 38 with 92 angular displacements of the 2nd pin and sells 95 angular displacements with the 3rd and freely be connected to the 2nd attaching parts 96 on the other end above being configured in of the 1st attaching parts 94.
The other end of above-mentioned the 2nd attaching parts 96 is fixed on the turning cylinder 97 of approximate horizontal configuration, and the push-pads 99 that pin 53 is removed in the clamping that is used for pushing each clamper 51 of above-mentioned thread tension adjustment unit 33 is fixed on the turning cylinder 97.This push-pads 99 is removed the chucking power that pin 53 is removed each a pair of holding piece 55a, 55b of each clamper 51 by the above-mentioned clamping of pushing, discharges the tension force of each upper thread A, upper ornamental thread B and bottom line C.
Above-mentioned the 2nd connecting portion 43 comprises: the 3rd attaching parts 101; The 4th attaching parts 102; The 5th attaching parts 103; One end angular displacement of the 3rd attaching parts 101 freely is connected to the pin of the 4th on the above-mentioned contiguous block 87 104; Angular displacement freely connects the 5th pin 105 of an end of the other end of the 3rd attaching parts 101 and the 4th attaching parts 102; Angular displacement freely connects the 6th pin 106 of an end of the other end of the 4th attaching parts 102 and the 5th attaching parts 103; Angular displacement freely is connected to the mid portion between the both ends of the 4th attaching parts 102 pin of the 7th on the sewing machine main body 32 107; Angular displacement freely connects the 8th pin 108 of the mid portion of the other end of the 5th attaching parts 103 and movable blade 35.
One end of above-mentioned movable blade 35 freely is connected to the inside of above-mentioned needle plate 34 with 109 angular displacements of the 9th pin.Above-mentioned the 1st～the 9th pin 36,92,95,104～109 also can be realized by for example cotter bolt.And the other end of above-mentioned movable blade 35 is provided with upper thread rotating shuttle (Needles yarn Off Star Network) 35a and bottom line rotating shuttle (Le one パ yarn Off Star Network) 35b in the 9th pin 109 1 sides as the angular displacement center.
Fig. 4 A～Fig. 4 E is the figure of action that the cutting facility 30 of Sewing machines is described, Fig. 4 A represents the state of movable blade 35 before being about to enter in the wire loop of right side line A; Fig. 4 B represents that right side line A1 is pushed away the state that expands by the peripheral part of upper thread rotating shuttle 35a; Fig. 4 C represents that right side line A1 can not resist upper thread rotating shuttle 35a peripheral part fully to the expansion power that pushes away of width both sides and the state cut off, Fig. 4 D represents that right side line A1, central upper thread A2 and left side line A3 can not resist being cut off to extrapolation expansion power of upper thread rotating shuttle 35a fully, the peripheral part that bottom line C crosses upper thread rotating shuttle 35a embeds the state of thread cutter blade, and Fig. 4 E represents that movable blade 35 normally enters the state in each wire loop of upper thread A1～A3 and bottom line C.In addition, the upper thread A1～A3 and the bottom line C that just cut off with movable blade 35 here describe, and do not cut off the explanation omission of the upper ornamental thread B of object as movable blade 35.
In the cutting facility 30 of above-mentioned Sewing machines, the thread tension adjustment unit 33 that is arranged at sewing machine main body 32 tops clip upper thread A1～A3, on ornamental thread B and bottom line C and give above-mentioned these upper threads A1～A3, under the clamp position of ornamental thread B and bottom line C tension force, be shown under the state that each pin S (with reference to Fig. 3) stops at dead point haply such as Fig. 4 A, movable blade 35 is advanced towards the direction near the arrow B 11 of needle downing position P below needle plate 34, and line A1 in the right side is pushed away by the peripheral part of upper thread rotating shuttle 35a and expands shown in Fig. 4 B.
At this moment, if do not adjust to the most appropriate opportunity on the opportunity of the clamp position of cutting facility 30 releasing 33 couples of upper thread A1～A3 of thread tension adjustment unit and bottom line C and the opportunity of movable blade 35 forward/backward action, keep the words of clamp position, then the tension force when making is endowed under the state on upper thread A1～A3 movable blade 35 and advances towards the direction of arrow B 11, pushes away expanding the upper thread wire loop.At this moment, do not remove the state of 33 couples of upper thread A1～A3 of thread tension adjustment unit and bottom line C clamping if be not in due course, then line A1 in the right side can not resist the expansion power that pushes away of upper thread rotating shuttle 35a peripheral part fully and cut off shown in Fig. 4 C.And central upper thread A2 and left side line A3 are pushed away by the peripheral part of upper thread rotating shuttle 35a and expand, and bottom line C is pulled on the peripheral part of upper thread rotating shuttle 35a.
And, when movable blade 35 continuation are advanced towards the direction of arrow B 11, shown in Fig. 4 D, central upper thread A2 and left side line A3 can not resist the pushing away expansion power of upper thread rotating shuttle 35a peripheral part fully and be cut off, and bottom line C crosses the peripheral part of upper thread rotating shuttle 35a and embeds the thread cutter blade.
If clip under the state of each suture at such thread tension adjustment unit 33 and to cut off upper thread A1～A3, then the tension force of upper thread A1～A3 sharply discharges, and upper thread is pulled back to thread tension adjustment unit one side under its reaction.The length of cutting off end of result from the through wires hole of pin to the upper thread of cutting off shortens, when again giving tension force in order to make next time and begin the moving up and down of pin, upper thread is extracted by the through wires hole from pin, and generation can not be made such problem swimmingly.And, when bottom line C is cut off by the thread cutter blade of upper thread rotating shuttle 35a as described above, the movable blade 35 that cutting off in the through wires hole that gets lodged in looper of bottom line C can not be kept out of the way the end and line ball spring (not expression among the figure) keep, when action was made in beginning next time, bottom line C was pulled out from looper 75.
In order to prevent such problem, form slotted hole 39 at cam part 40, form the 1st and the 2nd cam surface 81 at the inner peripheral surface that faces this slotted hole 39,82, make forcibly driven pulley 37 interior by the 1st and the 2nd cam surface 81 at slotted hole 39,82 guiding are driven, adjusting to movable blade 35 opportunity that the clamping of the thread tension adjustment unit 33 that can exactly cutting facility 30 be brought is removed advances opportune moment in the way towards the direction of arrow B 11, can be shown in Fig. 4 E, movable blade 35 is removed the clamp position of each upper thread A1～A3 and bottom line C on optimal opportunity, after making each upper thread A1～A3 and bottom line C lax, cut off upper thread A1～A3 and bottom line C.
Therefore, can make each upper thread A1～A3 is the suitable length of through wires hole of leaving each pin S, bottom line C can enough movable blade and line ball spring (not expression among the figure) keep, suture is extracted when preventing from making the action beginning next time, can not produce problem as described above.
In the such cutting facility 30 of this example, be provided with driven pulley 37 in an end of swing arm 38 and the mid portion of the other end, under the state in the slotted hole 39 that this driven pulley 37 freedoms of movement ground is embedded cam part 40, because by making cam part 40 can make swing arm 38 to a deflection displacement towards direction A11 displacement, by making to another way A12 displacement of cam part 40 can make swing arm 38 to the displacement of another one deflection, therefore utilize above-mentioned cam part 40 can make swing arm 38 towards the displacement of a direction A11 and another direction A12, the 1st attaching parts 94 and 96 interlocks of the 2nd attaching parts, any one from clamp position and clamping disarm state of thread tension adjustment unit 33 moved to another, can movable blade 35 advance the way in the clamp position of removing accurately upper thread A and bottom line C the most appropriate opportunity.
Fig. 5 is the decomposition diagram of the structure of the cutting facility 30a of the Sewing machines of other examples of expression the present invention.In addition, add identical Reference numeral with the corresponding part of above-mentioned example, and description thereof is omitted avoids repetition.The cutting facility 30a of the Sewing machines of this example comprises thread tension adjustment unit 33, movable blade 35, driven pulley 37, driven pulley guide member 121, cam part 40, drive division 41, the 1st connecting portion 42 and the 2nd connecting portion 43.
Above-mentioned driven pulley guide member 121 is fixed on the support 79, is provided with to allow driven pulley 37 towards the 1st direction J1 and the 2nd direction J2 displacement opposite with the 1st direction J1 and stop above-mentioned driven pulley 37 towards the direction K1 that intersects with the above-mentioned the 1st and the 2nd direction J1, J2, the driven pulley guide portion 120 of K2 displacement.Wherein, above-mentioned the 1st direction J1 is corresponding with the direction that above-mentioned thread tension adjustment unit 33 is moved from clamp position to the clamping disarm state, and the 2nd direction J2 is corresponding with the direction that above-mentioned thread tension adjustment unit 33 is moved from the clamping disarm state to clamp position.
Above-mentioned cam part 40 forms the slotted hole 39 that above-mentioned driven pulley 37 freedoms of movement ground is embedded, by the direction displacement towards arrow K1, make above-mentioned driven pulley 37 towards above-mentioned the 1st direction J1 displacement, and by the direction displacement towards arrow K2, make driven pulley 37 towards the 2nd direction J2 displacement.And above-mentioned cam part 40 is formed on the other end of the arm 38a on an end is combined in guide member 89 with bolt 36a the flange part 91.Above-mentioned driven pulley 37 is installed on the 2nd pin 92 of above-mentioned the 1st connecting portion 42.
Above-mentioned the 1st connecting portion 42 is with the displacement of above-mentioned arm 38a the other end---and the displacement that is above-mentioned driven pulley 37 passes to above-mentioned thread tension adjustment unit 33, makes the action or above-mentioned thread tension adjustment unit 33 is moved to above-mentioned clamp position from above-mentioned clamping disarm state from above-mentioned clamp position to above-mentioned clamping disarm state of above-mentioned thread tension adjustment unit 33.
Above-mentioned the 2nd connecting portion 43 passes to above-mentioned movable blade 35 with the driving force of above-mentioned drive division 41, makes above-mentioned movable blade 35 towards advancing direction B11 and direction of retreat B12 displacement.In this example, above-mentioned the 1st connecting portion 42 usefulness the 1st attaching parts 94 realize.
The cutting facility 30a of such Sewing machines allows driven pulley 37 towards the 1st direction J1 and the 2nd direction J2 displacement with driven pulley guide member 121, and stop above-mentioned driven pulley 37 towards and the 1st and the 2nd direction J1, the arrow K1 that J2 intersects, the direction displacement of K2, under the state in the slotted hole 39 that driven pulley 37 freedoms of movement ground is embedded cam part 40, cam part 40 makes above-mentioned driven pulley 37 towards the 1st direction J1 displacement towards the displacement of a direction K1, cam part 40 makes above-mentioned driven pulley 37 towards the 2nd direction J2 displacement to the displacement of another direction K2, thereby can switch accurately clamp position and the clamping disarm state of thread tension adjustment unit 33.
And, because driven pulley 37 is embedded in the slotted hole 39 of cam part 40, with the 1st cam surface 81 and the 2nd cam surface 82 these driven pulleys 37 of carrying and consist of, therefore even the careless contact such as operator's hand or object on every side and the impact force action that produces are in the 1st and the 2nd connecting portion 42,43, driven pulley 37 also can with the 1st and the 2nd cam surface 82 in some or both butts, can prevent the 2nd attaching parts 96 displacements that gap line tension adjustment unit 33 is nearest, and remove the such problem of clamp position of upper thread A, upper ornamental thread B and bottom line C.
The present invention can implement with the various forms that do not break away from its spirit and principal character.Therefore, above-mentioned example is had a few only example, and scope of the present invention is the described scope of claim, is not subjected to any restriction of specification text.And, belong to the interior distortion of claim scope or change all within the scope of the present invention.
Claims (1)
1. the cutting facility of a Sewing machines is characterized in that, comprising:
The thread tension adjustment unit is arranged on the top of sewing machine main body, can switch to clamping upper thread and bottom line and give the clamp position of above-mentioned upper thread and bottom line tension and removed any state in the clamping disarm state of this clamp position;
Movable blade towards advancing near the direction of needle downing position and retreating towards the direction of leaving above-mentioned needle downing position, is cut off above-mentioned upper thread and bottom line below needle plate;
Swing arm, an end angular displacement freely is connected on the above-mentioned sewing machine main body, and the middle part between the other end and an above-mentioned end is provided with driven pulley;
Cam part, be formed with the slotted hole that above-mentioned driven pulley freedom of movement ground embeds, utilize this cam part to make above-mentioned swing arm to a deflection displacement towards the displacement of a direction, utilize the displacement to another way of this cam part to make above-mentioned swing arm to another deflection displacement;
Drive division makes above-mentioned cam part towards an above-mentioned direction and above-mentioned another direction displacement;
The 1st connecting portion, the displacement of the other end of above-mentioned swing arm is passed to above-mentioned thread tension adjustment unit, above-mentioned thread tension adjustment unit is moved to above-mentioned clamping disarm state from above-mentioned clamp position, above-mentioned thread tension adjustment unit is moved to above-mentioned clamp position from above-mentioned clamping disarm state; And
The 2nd connecting portion passes to above-mentioned movable blade with the driving force of above-mentioned drive division, makes the ground displacement that moves forward and backward of above-mentioned movable blade;
Above-mentioned slotted hole forms with being bent, so that above-mentioned thread tension adjustment unit switches to above-mentioned clamping disarm state from above-mentioned clamp position in the way that above-mentioned movable blade is advanced;
The interior perimembranous that faces above-mentioned slotted hole at above-mentioned cam part is formed with: when above-mentioned cam part guides the 1st cam surface of above-mentioned driven pulley and guides the 2nd cam surface of above-mentioned driven pulley when above-mentioned cam part when above-mentioned another direction moves when an above-mentioned direction moves;
Above-mentioned the 1st cam surface and above-mentioned the 2nd cam surface form from horizontal direction towards above-mentioned another direction with being bent downwardly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009041542A JP5403401B2 (en) | 2009-02-24 | 2009-02-24 | Sewing machine thread trimmer |
| JP041542/2009 | 2009-02-24 |
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| Publication Number | Publication Date |
|---|---|
| CN101812779A CN101812779A (en) | 2010-08-25 |
| CN101812779B true CN101812779B (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101252656A Active CN101812779B (en) | 2009-02-24 | 2010-02-24 | Wire shearing device of sewing machine |
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| Country | Link |
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| JP (1) | JP5403401B2 (en) |
| KR (1) | KR101669674B1 (en) |
| CN (1) | CN101812779B (en) |
| TW (1) | TWI491776B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5850439B2 (en) * | 2013-09-20 | 2016-02-03 | ヤマトミシン製造株式会社 | Double chain stitch method and double chain stitch machine |
| CN109797492B (en) * | 2019-02-27 | 2021-04-20 | 杰克缝纫机股份有限公司 | Control method for eliminating stitches on fabric |
| CN111945311B (en) * | 2019-05-17 | 2022-03-01 | 杰克科技股份有限公司 | Thread trimming control method, thread trimming system and sewing machine |
| CN113235232B (en) * | 2019-10-12 | 2022-05-20 | 杰克科技股份有限公司 | Thread trimming and presser foot lifting mechanism and overedger |
| CN112064221B (en) * | 2020-09-30 | 2021-10-15 | 拓卡奔马机电科技有限公司 | Thread cutting system of sewing machine and sewing method |
| CN112323274B (en) * | 2020-11-21 | 2021-07-09 | 吴江市震宇缝制设备有限公司 | Protective clothing production is with sewing machine thread trimming mechanism |
| CN115323641A (en) * | 2022-08-29 | 2022-11-11 | 浙江中森缝纫机有限公司 | Cutting device and sewing machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62134452A (en) * | 1985-12-07 | 1987-06-17 | Katsumi Kuwabara | Circulation heating device for hot water |
| JPH03205092A (en) * | 1989-12-29 | 1991-09-06 | Juki Corp | Cycle sewing machine |
| JP3531524B2 (en) * | 1999-04-30 | 2004-05-31 | ブラザー工業株式会社 | Sewing machine lower thread cutting device |
| JP3817159B2 (en) * | 2001-10-15 | 2006-08-30 | Ｊｕｋｉ株式会社 | Thread trimmer for horizontal shuttle sewing machine |
| JP4138355B2 (en) * | 2002-04-02 | 2008-08-27 | Ｊｕｋｉ株式会社 | Upper thread holding device for sewing machine |
| CN101191276A (en) * | 2006-11-22 | 2008-06-04 | 梁海强 | Blind seam shoulder pad sewing machine |
| KR200447773Y1 (en) * | 2007-07-10 | 2010-02-17 | 치 시앙 인더스트리얼 캄퍼니 리미티드 | Automatic yarn cutting device of sewing machine |
-
2009
- 2009-02-24 JP JP2009041542A patent/JP5403401B2/en active Active
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2010
- 2010-01-19 TW TW099101347A patent/TWI491776B/en active
- 2010-02-01 KR KR1020100009195A patent/KR101669674B1/en active IP Right Grant
- 2010-02-24 CN CN2010101252656A patent/CN101812779B/en active Active
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| JP昭44-6853B 1969.03.23 |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201037119A (en) | 2010-10-16 |
| TWI491776B (en) | 2015-07-11 |
| CN101812779A (en) | 2010-08-25 |
| JP2010194066A (en) | 2010-09-09 |
| KR20100097012A (en) | 2010-09-02 |
| KR101669674B1 (en) | 2016-11-09 |
| JP5403401B2 (en) | 2014-01-29 |
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