CN1299897A - Thread-cutting device for sewing machine - Google Patents
Thread-cutting device for sewing machine Download PDFInfo
- Publication number
- CN1299897A CN1299897A CN 00135724 CN00135724A CN1299897A CN 1299897 A CN1299897 A CN 1299897A CN 00135724 CN00135724 CN 00135724 CN 00135724 A CN00135724 A CN 00135724A CN 1299897 A CN1299897 A CN 1299897A
- Authority
- CN
- China
- Prior art keywords
- upper cutter
- cutter
- lower cutter
- sewing
- suture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
- D05B3/06—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for sewing buttonholes
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B73/00—Casings
- D05B73/04—Lower casings
- D05B73/12—Slides; Needle plates
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a thread cutter which is capable of cutting threads by widening front and rear ranges where the threads may be cut and shortening the remaining threads in compliance with the position of the terminal of a seam. This thread cutter is disposed at a right feed plate. The thread cutter has an upper knife and a lower knife for cutting the bobbin thread and a wadding near the terminal of sewing. The upper knife is moved by guide grooves, a step screw, a supporting shaft, an upper knife link and a lower knife link in such a manner that the front end of the upper knife draws a locus L. The upper knife and the lower knife are integrally mounted at a knife mounting section and the mounting position of a knife mounting sectionis changeable in the axial direction of the sewing machine.
Description
The present invention relates to a kind of thread cutting device of sewing machine for binding buttonhole of automatic locking buttonhole.
For example, carry out the sewing machine for binding buttonhole of eyelet around the buttonhole on sewing, generally have following structure.
That is, be arranged on cloth-pressing device is housed on the cloth pushing table on the sewing machine table, sewing is clamped on the cloth pushing table by cloth-pressing device.Carry sewing by the cloth-feeding device on this cloth pushing table along the shape driving of cutting out buttonhole.
And, be arranged on the shank on the head of sewing machine, make its knee-action by driving mechanism about the shank, by the eedle swing mechanism that is arranged on the head of sewing machine every seam 1 pin of eedle is swung simultaneously.
With moving up and down and the cooperating that eedle is swung of shank, the rotating shuttle driving mechanism that is arranged in the board makes the rotating shuttle action, carries out eyelet with both coordinations along buttonhole.
But also be provided with the hole-cutting device for cloth of forming by cutting knife and hammer body, on sewing, cut out buttonhole with desirable time point.
In such sewing machine for binding buttonhole, near described rotating shuttle, be provided with the guiding core line mechanism, the heart yearn that will draw from supply source is derived to the described eedle position that swings, and heart yearn is sewed up in the stitch stitch is reinforced.And the cloth pushing table of Sewing machines is provided with finishes the thread cutting device that cuts off bottom line and heart yearn behind the buttonhole.
Below, just the mechanism of thread cutting device in the past and setting around it describes with reference to accompanying drawing.
As shown in figure 16, be provided with in the rear end of left cloth pushing table 502 and make the moving up and down left compress of left cloth presser 506 actuation mechanism 504 up and down.And, be arranged on the right-hand member of left cloth pushing table 502 at the left receiving plate 508 of the lower support sewing of sewing.Left side cloth presser 506 descends, and clamps the sewing in buttonhole left side with left cloth presser 506 and left receiving plate 508.
Left and right sides cloth pushing table 501,502 is provided with for opposite, the left and right sides.In addition, make the moving up and down right compress of right cloth presser 505 up and down actuation mechanism 503 be arranged on the rear end of right cloth pushing table 501.And, being arranged on the left end of right cloth pushing table 501 at the right receiving plate 507 of the lower support sewing of sewing, right cloth presser 505 descends, and clamps the sewing on buttonhole right side with right cloth presser 505 and right receiving plate 507.And, between right receiving plate 507 and left receiving plate 508, the sewing of clamping is carried out buttonhole, cut buttonhole simultaneously.
And thread cutting device is by upper cutter 509 and lower cutter 510 with make upper cutter 509 and the lobe plate 512 of lower cutter 510 action and constitute to the linkage 513 of lobe plate 512 power transmission of drive unit 514.
Last lower cutter 509,510, the intermediate portion rotatably is supported on respectively on the right cloth pushing table 501 by segmentation screw 511, and upper cutter 509 is positioned at the top of lower cutter 510, and lower cutter 510 is arranged on the place ahead of the right receiving plate 507 of keeping right than upper cutter 509.
The front end of lower cutter 510 is positioned at the bottom of sewing, clamps the sewing on buttonhole right side with above-mentioned right cloth presser 505.And, being formed with cam docking section 510b at the base end part of lower cutter 510, cam docking section 510b docks with the cam surface 512a of lobe plate 512.This lobe plate 512 can be supported on the right cloth pushing table 501 by segmentation screw 515 with rotating freely.
In addition, be that the base end part of the upper cutter 509 of blade 509a is formed with cam docking section 509b at lateral edges, it docks with the cam part 512b of lobe plate 512.
When the blade 510a of the blade 509a of upper cutter 509 and lower cutter 510 is in open mode, chimeric lobe plate 512 between the cam docking section 510b of the cam docking section 509b of upper cutter 509 and lower cutter 510.At this moment, the end along the formation of the buttonhole on sewing stitch between above-mentioned rotating shuttle and above-mentioned guiding core line mechanism, clips bottom line and heart yearn, in its both sides, is provided with the blade 509a of upper cutter 509 and the blade 510a. of lower cutter 510.
When make linkage 513 actions by driving mechanism 514, when causing lobe plate 512 to rotate, make the cam docking section 510b pressurized of the cam docking section 509b of upper cutter 509 and lower cutter 510 and open, upper cutter 509 and lower cutter 510 are that rotate at the center with segmentation screw 511.Like this, the blade 509a of upper cutter 509 and the blade 510a of lower cutter 510 are closed near pin terminals, cut off bottom line and heart yearn.According to such cut-out, can make the suture length (residue line) of cut-out portion of cut-out portion from the terminal of stitch to bottom line and heart yearn short and can cut off bottom line and heart yearn.
But the buttonhole of being made is to be made of with the left and right sides line part that links to each other with its buttonhole portion buttonhole portion, because the length of line part can be done various changes, so just different according to the front and back position of the length pin terminals of line part.That is, along with buttonhole line part length shortens, the terminal location of stitch is by rear (Figure 16 top), and along with buttonhole line part length is elongated, the terminal location of stitch is (Figure 16 below) on the front.
So, when the length variations of buttonhole line part,,, must near its terminal, make the blade 510a closure of the blade 509a and the lower cutter 510 of upper cutter 509 corresponding to the terminal location of stitch for cutting out short residue line.
Because the lower cutter 510 in the above-mentioned thread cutting device in the past is provided with along buttonhole line part one side when last lower cutter opens, therefore can make the blade 510a of lower cutter 510 be long limit along line part, though like this length variations of line part also can be located at make terminal near.
But, upper cutter 509, as shown in figure 16, from the deployed position on the extended line that is positioned at line part to the off-position of lower cutter 510 closures, with the segmentation screw on the right receiving plate 507 511 is that the center is being supported rotationally, so if upper cutter 509 is oversize, the front end of upper cutter 509 will be involutory with left receiving plate 508.
That is, make the blade 509a of upper cutter 509 and lower cutter 510 blade 510a can be closed front and back expanded range unusual difficulty just, above-mentioned thread cutting device in the past corresponding to the length restriction of the buttonhole that can cut off in very narrow scope.
At this,, the object of the present invention is to provide and a kind ofly can cut off the front and back expanded range of line, and can cut off suture at the terminal location of stitch and make the very short thread cutting device of residue line for addressing the above problem.
Thread cutting device for the present invention's of addressing the above problem 1 Sewing machines, have the terminal location of making at the line that forms stitch, left and right sides clamping is also cut off the upper cutter and the lower cutter of suture, can displacement in the prescribed limit on a described straight line direction of making terminal location of cutting off line.It has: with respect to one fixedly straight line clamp suture, with the upper cutter direction of closing on can support rotationally, and can be corresponding to the described lower cutter of making the full displacement scope of terminal location; The described straight line direction in one edge moves, Yi Bian clamp suture, with the lower cutter direction of closing on can support rotationally, and can the corresponding described upper cutter of making the full displacement scope of terminal location along moving on the described straight line direction.
Like this, thread cutting device is made compact structure and also can enlarge tangential extent.
And, the thread cutting device of the present invention's 2 Sewing machines, have the terminal location of making at the line that forms stitch, left and right sides clamping is also cut off the upper cutter and the lower cutter of suture, and described the making that can cut off line can displacement in the prescribed limit of terminal location on a straight line direction.It has: with respect to one fixedly straight line clamp suture, with the upper cutter direction of closing on can support rotationally, and can be corresponding to the described lower cutter of making the full displacement scope of terminal location; The described straight line direction in one edge moves, Yi Bian clamp suture, with the lower cutter direction of closing on can support and the upper cutter that the moving range that moves along a described straight line direction can be moved in a described straight line direction adjusted rotationally.
Like this, 1 same with the present invention makes thread cutting device compact structure and can enlarge tangential extent.
And, the thread cutting device of the present invention's 3 Sewing machines, has the cloth presser of pushing down near the sewing of sewing position, and have between described cloth presser, make sewing be in the portion of bearing of clamp position, placing simultaneously described sewing and with this sewing to making the cloth pushing table that direction moves, with be arranged on described cloth pushing table one side, and have after finishing buttonhole will be from making the extended suture of terminal location at described near the upper cutter of clamping and cutting off the terminal location and the thread cutting device of lower cutter made, it is characterized by, have described lower cutter is arranged on the described cloth pushing table free to rotately, when cutting off described suture, with the blade of the blade of described upper cutter and described lower cutter from the state opened mutually when overlapping closing position moves up and down in described suture off-position, in the track that the front end of described upper cutter is walked out by the eedle position roughly along the axial displacement D1 of Sewing machines, when roughly being D1/D2 along ratio with the displacement D2 of described axial vertical direction, with be that the center is moved the rotation of described upper cutter by rotating fulcrum with described lower cutter, when being circular arc, the track that this upper cutter front end is walked out compares, make it (for example than the cutting knife mobile device of the big and mobile described upper cutter of D1/D2, gathering sill 340,341, segmentation screw 316, back shaft 318).
At this moment, the direction of principal axis of so-called Sewing machines is meant the fore-and-aft direction that this head of sewing machine extends.
Displacement by eedle position Sewing machines direction of principal axis (fore-and-aft direction of Sewing machines) in the track that the front end of this upper cutter is walked out is D1, and roughly the displacement with this direction of principal axis vertical direction is D2, and displacement D1 is D1/D2 with the ratio of displacement D2.
Then, the cutting knife mobile device moves described upper cutter, is that the center is moved the rotation of described upper cutter by the pivot point with lower cutter, and the track of being walked out with above-mentioned cutting knife front end is compared during for circular arc, describedly becomes big than D1/D2.
Also can make the lower cutter rotation, also can make the lower cutter rotation by other mobile devices by mobile device.
As mentioned above, be mobile upper cutter, when for example being the center rotation than upper cutter with the same fulcrum with lower cutter rotation, the front end of the upper cutter when making the blade of the blade of upper cutter and lower cutter closed is positioned at the rear that portion's front position is born on a corresponding left side.
Promptly, bear portion for the front end that does not make upper cutter touches a left side, upper cutter is moved to off-position after because displacement D1 is bigger than displacement D2, than being same pivot and when avoiding left receiving plate and rotating at upper cutter with the pivot with lower cutter, the front end of upper cutter is positioned at the rear.
So, for example, can use than the long upper cutter blade of above-mentioned example in the past.The front and back expanded range that can cut off with upper cutter blade and lower cutter blade like this.Therefore just can corresponding long making length and cut out short residue line.
In the above description, be that upper cutter and lower cutter are arranged on the right cloth pushing table, an opposite side of relation is set about also upper cutter and lower cutter etc. can being arranged on.And the front and back scope that can cut off with upper cutter blade and lower cutter blade is from the front end of left receiving plate to upper cutter and the longitudinal separation of the upper cutter front end of lower cutter when closed mutually.
The thread cutting device of the present invention's 4 Sewing machines is in the present invention's 3 thread cutting device, it is characterized in that it is boundary that the described portion of bearing is provided with the Sewing machines axis by eedle, is divided into left and right sides receiving plate (for example left receiving plate 113, right receiving plate 213); Described upper cutter and described lower cutter are under open mode, described lower cutter is arranged on front portion one side of side's receiving plate in the described left and right sides receiving plate that bears portion, the blade that can make described lower cutter is at described near axis and approximately along this axis direction, and described upper cutter is set to extend to the front portion of the opposing party's receiving plate from the front portion of a side receiving plate; When cutting off described suture, by the mobile device of described cutting knife the blade of lower cutter is rotated near above-mentioned axis, and, above-mentioned track of front end edge that extends to described receiving plate one side of bearing the opposing party of portion and the receiving plate of avoiding described the opposing party are moved.
According to the present invention 4, when upper cutter and lower cutter moved from the open mode to the closure state, along above-mentioned track, and the receiving plate of avoiding the opposing party moved from receiving plate the place ahead of the opposing party on the top of upper cutter, so upper cutter moves on to off-position.
At this moment, the front end of upper cutter is for walking out above-mentioned track, 3 same with the present invention, for example, is center when rotating than upper cutter with the same fulcrum with the rotating fulcrum of lower cutter, and the front end of the upper cutter the when blade of upper cutter and the blade of lower cutter are closed is positioned at the rear of the opposing party's receiving plate front position.So, enlarged with the blade of upper cutter and the blade of lower cutter and can cut off the scope of suture, can be corresponding to the length of buttonhole parallel portion, and make terminal near the cut-out suture.
Therefore and the rotation of lower cutter is also undertaken by mobile device, does not need to make lower cutter rotates other tumbler, and the thread cutting device of simple structure is provided.
The thread cutting device of the present invention's 5 Sewing machines is characterized in that, as shown in Figure 8, is in the present invention's 3 or 4 thread cutting device, on described upper cutter, and the gathering sill (340,341) that to be provided with 2 length directions be different directions; On the installation site of the described upper cutter of described cloth pushing table, be provided with 2 and (for example insert 2 fulcrum shafts in the described gathering sill respectively, segmentation screw 316, back shaft 318), 2 gathering sills that this fulcrum shaft inserts, has when cutting off described suture the guiding shape that the described track of front end edge of described upper cutter is moved.
The present invention's 5 be the present invention 3 or the desirable concrete structure of 4 thread cutting device, according to the present invention 5, the gathering sill that will have the shape that the described track of the front end edge that makes upper cutter moves is arranged on the upper cutter, so simplified the structure of thread cutting device.And, only upper cutter is moved along described track with 2 gathering sills and 2 back shafts, therefore simplified the structure of thread cutting device.
In addition, 3 same with the present invention, the front end of upper cutter is for walking out above-mentioned track, for example, is center when rotating than upper cutter with the same fulcrum with the rotating fulcrum of lower cutter, and the front end of upper cutter was positioned at the rear with respect to the front position of the opposing party's receiving plate when the blade of upper cutter and the blade of lower cutter were closed.So, can make the front and back expanded range of cutting off suture with the blade of the blade of upper cutter and lower cutter, make the parallel portion length of its corresponding buttonhole, can make the end near the cut-out suture.
The thread cutting device of the present invention's 6 Sewing machines, have with place described sewing and with this sewing along the sewing machine for binding buttonhole of making the cloth pushing table that direction moves, be arranged on following described cloth pushing table one side of described sewing, and after finishing buttonhole, the upper cutter and the lower cutter of near suture approximate scissors shape of cut-out described final position of making that will stretch out from the final position of making of described sewing buttonhole, it is characterized by, have: the cutting knife supporting point part (for example, the cutting knife fixed part 303) that has the action fulcrum of described upper cutter and lower cutter; Be arranged on the described cloth pushing table, and described cutting knife supporting point part is installed, can freely change the fixed base board (for example, right delivery board 201) of the installation site that makes described cutting knife supporting point part simultaneously along the direction of principal axis of Sewing machines.
According to the present invention as described hereinbefore 6, the cutting knife supporting point part is with respect to the fixing base that is arranged on the cloth pushing table, its installation site can freely change along the direction of principal axis of Sewing machines, therefore corresponding to making terminal location (making length direction), each that can cut off with the blade of the blade of upper cutter and lower cutter is cut off can changing along the Sewing machines axis of scope.And during with the change of the installation site of upper cutter and lower cutter, upper cutter and lower cutter keep the roughly shape of scissors, with the cutting knife supporting point part along the change of Sewing machines direction of principal axis, so need not adjust again to the cutting knife pressure of upper cutter and lower cutter.
The thread cutting device of the present invention's 7 Sewing machines, as Fig. 3～shown in Figure 5, in the thread cutting device of the present invention's 6 Sewing machines, have: when cutting off described suture, the drive source (for example, driving mechanism 31) that the blade of the blade of described upper cutter and lower cutter is moved to the closing position that overlaps up and down in described cut-out suture position from the state of opening mutually; The upper cutter connecting rod (304) that is rotatably connected with above-mentioned upper cutter; The lower cutter connecting rod (305) that is rotatably connected with above-mentioned lower cutter; Be connected with above-mentioned drive source, be connected with the lower cutter connecting rod with above-mentioned upper cutter connecting rod again simultaneously, and make progress cutter connecting rod and lower cutter connecting rod transmission driving force, the connection connecting rod 306 that when transmission, slightly linearly moves simultaneously; Described connection connecting rod, with the connecting portion of upper cutter connecting rod and lower cutter connecting rod and with the connecting portion of drive source at least one side's connecting portion, its link position can freely change along the direction of principal axis of Sewing machines roughly.
According to aforesaid the present invention's 7, the connecting portion of upper cutter connecting rod and lower cutter connecting rod and with the connecting portion of drive source at least one side's connecting portion, its link position can freely change along the direction of principal axis of Sewing machines roughly, even therefore do not change the axial position of Sewing machines of drive source, the position of upper cutter and lower cutter is changed along the Sewing machines direction of principal axis with respect to cloth pushing table with upper cutter connecting rod and lower cutter connecting rod.
Promptly, the position of upper cutter and lower cutter can keep the direction of principal axis change along Sewing machines of original scissors shape, so, have effect and the effect same with the present invention's 6, make corresponding to the terminal location of making, the cut-out scope of upper cutter and lower cutter can not need the cutting knife pressure of upper cutter and lower cutter is adjusted along the change of Sewing machines direction of principal axis simultaneously.
Below, symbol among accompanying drawing and the figure is described.
Fig. 1 is suitable for the overall perspective view of the summary formation of routine sewing machine for binding buttonhole for the present invention.
Fig. 2 is the left cloth-pressing device of above-mentioned sewing machine for binding buttonhole and the exploded perspective view of right cloth-pressing device.
Fig. 3 is the exploded perspective view of thread cutting device example involved in the present invention.
Fig. 4 is the upper cutter of above-mentioned thread cutting device and the vertical view of the mutual open mode of lower cutter.
Fig. 5 is the upper cutter of above-mentioned thread cutting device and the lower cutter vertical view to the off-position mobile status.
Fig. 6 is the major part figure of above-mentioned thread cutting device.
Fig. 7 is the major part figure of above-mentioned thread cutting device.
Fig. 8 is the front end trace specification figure of the upper cutter of above-mentioned thread cutting device.
Fig. 9 is the vertical view of the main portion of above-mentioned thread cutting device.
Figure 10 is the vertical view of the main portion of above-mentioned thread cutting device.
Figure 11 is the key diagram of above-mentioned thread cutting device action.
Figure 12 is the key diagram of above-mentioned thread cutting device action.
Figure 13 is the key diagram of above-mentioned thread cutting device action.
Figure 14 is the key diagram of above-mentioned thread cutting device action.
Figure 15 is the key diagram of above-mentioned thread cutting device action.
The vertical view of Figure 16 thread cutting device example in the past.
Among the figure: 1-eye Sewing machines, 14-eedle, 16-cloth pushing table, 30-tangent line main body, 31-driving mechanism (drive source), 51-bottom line (suture), 52-heart yearn (suture), 101-left delivery board (being included in the cloth pushing table), 112-cloth presser, 113-left receiving plate (bears portion, the opposing party's receiving plate), 201-right delivery board (being included in the cloth pushing table), 213-right receiving plate (bears portion, one side's receiving plate), 301-upper cutter, 301c-blade (blade of upper cutter), 302-lower cutter, 302b-blade (blade of lower cutter), the lateral margin of 302c-lower cutter (with the lateral margin of the opposite side of blade lateral margin of lower cutter), 303-fixed cutting tool portion (cutting knife supporting point part), 303b-junction surface (second junction surface), 304-upper cutter connecting rod (cutting knife mobile device), 305-lower cutter connecting rod (cutting knife mobile device), 306-connection connecting rod (cutting knife mobile device), 306a-fixed part (with the connecting portion of drive source), 307-driving cylinder, 316-segmentation screw (cutting knife mobile device, supporting axis), 318-supporting axis (cutting knife mobile device, supporting axis), 322-fixing hole (the 1st junction surface), 326-bolt (detent mechanism), 340-gathering sill (cutting knife mobile device), 341-gathering sill (cutting knife mobile device).
Embodiment
Below, the embodiment of the thread cutting device of Sewing machines of the present invention is described according to Fig. 1～Figure 15.
In Fig. 1, Sewing machines 10 is by the board 11 of slightly rectangular case shape, with the vertical body portion 20 that erects from the rear portion of this board, almost constitute with top, be placed on by casing 13 on the operating desk (not showing among the figure) of Sewing machines with the head 12 that board 11 forwards stretches out abreast from vertical body portion 20.In the following description, the axle side of Sewing machines is a fore-and-aft direction.
At the head of head 12, the shank that has eedle 14 15 of its bottom, but knee-action and every seam 1 pin all make the eedle action that swings.
And in board 11, the position of the vertical lower of shank 15 is provided with the rotating shuttle that does not show among 2 figure.The moving up and down and eedle swing synchronization action of this rotating shuttle and shank 15 forms stitch with eedle 14 coordinations like this on the sewing that is placed on the cloth pushing table 16.And, near above-mentioned rotating shuttle, being provided with the heart yearn 52 of will draw from the suture supply source, the heart yearn guiding mechanism that does not show among the figure that derives between the eedle swing position of the left and right sides of Sewing needles 14, heart yearn 52 sew up in the stitch stitch are strengthened.
And, in board portion 11, being arranged in the rotating shuttle side (rear side) of advancing is provided with by rag knife 17 (showing at Fig. 4 etc.), with the hole-cutting device for cloth 19 that constitutes from the hammer body 18 of top contact separation with this rag knife 17 (show Fig. 4 etc.), this hole-cutting device for cloth 19 is moved at needed time point, on sewing, cut out circular hole or straight hole.
On board portion 11, be provided with the cloth pushing table 16 of placing sewing, be provided with left cloth-feeding plate 101 of formation and right cloth-feeding plate 201 above the cloth pushing table 16 at this.Left side cloth-feeding plate 101 and right cloth-feeding plate 201, the Sewing machines axis that extends with front and back is the center, is arranged to left and right sides subtend.Being respectively arranged with left cloth-pressing device 102 described later and right cloth-pressing device 202 (showing in Fig. 2 etc.) on left cloth-feeding plate 101 and the right cloth-feeding plate 201, push down sewing from the both sides of described incision by this left side cloth-pressing device 102 and right cloth-pressing device 202.
Cloth pushing table 16 all is the casing of thin rectangular shape shape, has 2 pulse motors not showing among the figure and is driven by transport, moves at left and right directions and fore-and-aft direction.This cloth pushing table 16 from the state of determining at origin position, moves to making the starting position from origin position by the operation to the firing switch that do not show among the figure, and moves along the buttonhole that should form on the sewing.The sewing that will be placed on like this on the cloth pushing table 16 moves to the necessary position of the straight below of eedle 14, carries out eyelet along the buttonhole order.
Then, cloth pushing table 16 returns initial point after sewing upper edge buttonhole is finished eyelet, and the position of buttonhole is positioned at rag knife 17 and hypophysis 18 places on the sewing of Fang Zhiing in the above.On this position, (cut off the cloth position), the incision of hypophysis 18 trailing edge buttonholes.
On the right cloth-feeding plate 201 of cloth pushing table 16, be provided with after finishing eyelet, cut off the thread cutting device 37 that extends in the bottom line 51 (show Fig. 5 etc. in) of needle plate 21 (show Fig. 4 etc.) and above-mentioned heart yearn guiding mechanism and heart yearn 52 (show Fig. 5 etc. in) from the terminal that forms stitch at sewing upper edge buttonhole.
Below, be elaborated with reference to accompanying drawing.
Among Fig. 2, on the rear end of left cloth pushing table 101, fixing compress bar fixed station 103 by bolt 104.About the fulcrum shaft 105 that extends, be fixed on the compress bar fixed station 103 by C type ring 106,106 free to rotately.This fulcrum shaft 105 penetrates compress rod base 107 and fastening by holding screw 108.The rear end of the compress bar 109 that extend front and back penetrates described compress rod base 107, and is fastening by holding screw 110.At the front end of compress bar 109, can freedom joltily fix cloth presser 112 by segmentation screw 111.This left cloth-pressing device 102, because the rotation of its compress rod base 107, compress bar 109 dipping and heavings move up and down cloth presser 112.Compress rod base 107 to cloth presser 112 application of force downwards, is moved upward cloth presser 112 by the drive unit that does not show among the figure by the force application apparatus that does not show among the figure.
In addition, right cloth-pressing device 202 is arranged on the rear end of right cloth-feeding plate 201, with left cloth-pressing device 102 be center subtend setting with the Sewing machines axis.The structure of right cloth-pressing device 202 has identical structure with left cloth-pressing device 102, at this, the structure identical with left cloth-pressing device 102 represented with same-sign, and the omission explanation.
Left receiving plate 113 is being fixed with screw 114 by margo dexter portion on left cloth-feeding plate 101.The direction of principal axis of the long edge Sewing machines of this left side receiving plate 113 is near above-mentioned left cloth presser 112 clamps the buttonhole left side that should make on the sewing.And right receiving plate 213 is being fixed with screw 214 by the left border portion on right cloth-feeding plate 201.This right side receiving plate 213 and left receiving plate 113 subtend settings.And this right side receiving plate 213 is near above-mentioned right cloth presser 112 clamps the buttonhole left side that should make on the sewing.
Below, with regard to thread cutting device 37, describe with reference to Fig. 3～Fig. 5.
This thread cutting device 37 is mainly formed by cutting off from the tangent line main frame 30 of extended bottom line 51 of buttonhole terminal and heart yearn 52 and the driving mechanism 31 and the right cloth-feeding plate 201 of driving tangent line main frame 30.
At first, driving mechanism 31 is described.
As shown in Figure 3, installing plate 38 is fixed on the front end inside of cloth pushing table 16 by screw 309, by this installing plate 308 driving cylinder 307 is fixed on cloth pushing table 16 inside.This driving cylinder 307 is arranged on the below of left cloth-feeding plate 101 and right cloth-feeding plate 201.Fixing driving output loading part 310 at the front end of cylinder 307.One end of tangent line crank connecting link 311 is being fixed roller 311a, and roller 311a engages with above-mentioned loading part 310.One end of tangent line drive rod 312 is formed with axial region 312a, and axial region 312a is inserted in the hole of right cloth-feeding plate 201 free to rotately.And axial region 312a penetrates the other end of tangent line crank connecting link 311, and usefulness screw 313 is fixed axial region 312a and is connected with tangent line crank connecting link 311.The end that forms the axial region 312a of tangent line drive rod 312 is the connecting portion that is connected with other ends of aftermentioned tangent line main frame 30.And, on tangent line crank connecting link 311, be fixed with the force application spring 328 that aftermentioned upper cutter 301 and lower cutter 302 are decontroled mutually.
Below, tangent line main frame 30 is described.
Tangent line main frame 30, mainly by the upper cutter that roughly is the scissors shape 301 and the lower cutter 302 that will near this makes the end, cut off from the extended bottom line 51 of eyelet terminal part and heart yearn 52, with the fixing cutting knife installation portion 303 of upper cutter 301 and lower cutter 302, with the upper cutter connecting rod 304 that is rotatably connected with upper cutter 301, with the lower cutter connecting rod 305 that is rotatably connected with lower cutter 302, and constitute with connecting rod 306 that upper cutter connecting rod 304 is connected with lower cutter connecting rod 305.
The connecting rod 306 of length on the Sewing machines direction of principal axis, its leading section is being arranged installing hole 306a along the Sewing machines direction of principal axis with predetermined distance, 306a ...,, be formed with protuberance 306b in the rear end of connecting rod 306.And, fixing an end of upper cutter connecting rod 304 and an end of lower cutter connecting rod 305 at about central portion of connecting rod by segmentation screw 314 free to rotately.At the other end of upper cutter connecting rod 304, connecting the cardinal extremity of upper cutter 301 free to rotately.At the other end of lower cutter connecting rod 305, connecting the cardinal extremity of lower cutter 302 free to rotately.
Below cutting knife installation portion 303, be formed with junction surface 303b, on cutting knife installation portion 303, be formed with recess 303a.On this recess 303a, insert embedding and leaf spring packing ring 315.Fixing lower cutter 302 by segmentation screw 316 on cutting knife installation portion 303, segmentation screw 316 is inserted in the above-mentioned leaf spring packing ring 315 free to rotately.Lateral margin at lower cutter is formed with blade 392b.
As mentioned above, tangent line main frame 30, by upper cutter 301, lower cutter 302, cutting knife installation portion 303, upper cutter connecting rod 304, lower cutter connecting rod 305 and connecting rod 306 one constitute.
Below, the adjustment of the cutting knife pressure of upper cutter 301 and lower cutter 302 is described.
As shown in Figure 6, because above-mentioned segmentation screw 316 is fastening, compression leaf spring packing ring 315 makes it exert pressure to upper cutter 301 and lower cutter 302.That is,, can adjust the cutting knife pressure of upper cutter 301 and lower cutter 302 by to these segmentation screw 316 amounts of being screwed into.
Below, the installation of the above-mentioned right cloth-feeding plate 201 of the above-mentioned tangent line main frame 30 of subtend describes.With reference to Fig. 3 and Fig. 4, on the right cloth-feeding plate 201 in the right side, be formed with length along the axial slot part 201a of Sewing machines, in slot part 201a, be formed with the patchhole 201b of length on the Sewing machines direction of principal axis.And, on right cloth-feeding plate 201, be disposed with installing hole 322,322 along the Sewing machines direction of principal axis with predetermined distance ...And, on right cloth-feeding plate 201, be provided with the dog screw 326 that can be free to slide with the direction of principal axis approximate vertical direction of Sewing machines, this dog screw 326 is by fastening being fixed on the position of stipulating on the right cloth-feeding plate 201 that be threaded with screw fixed part 327.
Above-mentioned connection connecting rod 306 can be inserted among the above-mentioned slot part 201a along the direction of principal axis of Sewing machines with being free to slide, and the protuberance 306b that connects connecting rod 306 simultaneously can be inserted among the above-mentioned patchhole 201b along the Sewing machines direction of principal axis with being free to slide.And the junction surface 303b of above-mentioned cutting knife installation portion 303 is inserted in above-mentioned installing hole 322,322 ... in an installing hole 322 in, in installing hole 322, engaging junction surface 303b.And, by screw 325,325 cutting knife installation portion 303 is fixed on the right cloth-feeding plate 201.And, insert installing hole 322 corresponding to junction surface 303b, the end 312b of an opposite side of the end that is provided with axial region 312a of tangent line drive rod 312 is fixed among the installing hole 306a among installation portion 306a, the 306a by segmentation screw 329 free to rotately.Decide the front and back position of the right relatively cloth-feeding plate 201 of cutting knife installation portion 303 like this.
Tangent line main frame 30 is to be fixed on the state on the right cloth-feeding plate 201, and this tangent line main frame 30 is hidden by cutting knife guard shield 321, and when thread cutting device 37 actions, sewing can not be involved in the thread cutting device 37.
As mentioned above, under tangent line main frame 30 mounted states, the blade 301c of upper cutter 301 and the blade 302b of lower cutter 302 are in opened state and show in Fig. 4.
As shown in Figure 4, the state that is provided with of the position of readiness of lower cutter 302 before cutting off bottom line 51 and heart yearn 52 is that the lateral margin of the blade 302b of lower cutter 302 is set to roughly along the Sewing machines direction of principal axis.And blade 302b is towards left receiving plate 113.And the lateral margin 302c of the opposite side of blade 302b, with the lateral margin almost parallel of blade 302b.In addition, above-mentioned dog screw 326 is fastening and fixing, determine upper cutter 301 and lower cutter 302 position of lower cutter 302 during open mode each other.If describe in detail, as shown in Figure 7, the lateral margin of the blade 302b of lower cutter 302 is set to continue with the left border of above-mentioned right receiving plate 213, docks with dog screw 326 with the lateral margin 302c of the opposite side of lateral margin of the blade 302b of lower cutter 302.
And with reference to Fig. 4, under this open state, the lateral margin of the front end of lower cutter 302 is with the front end adjacency of above-mentioned right receiving plate 213.The lateral margin of the front end of lower cutter 302 is arranged on a side of leaning on the rear than the front end of above-mentioned left receiving plate 113.And the thickness of the thickness of this lower cutter 302 and above-mentioned right receiving plate 213 is roughly the same, clamps the sewing on the right side of answering the eyelet buttonhole with above-mentioned cloth presser 112.
As mentioned above, owing to make the lateral margin of the blade 302b of lower cutter 302 be set to continue with the left border of right receiving plate 213, lower cutter 302 is with the reliable clamping sewing of above-mentioned right cloth presser 112, the empty needle pin in the time of therefore can preventing to make make underproof generation.
The state that is provided with of the position of readiness before cut-out, upper cutter 301 are set to from the place ahead of right receiving plate 213 state that extend in the place ahead of receiving plate 113 left.The blade 301c of upper cutter 301 is towards the buttonhole that should make.
What show among Fig. 5 is that the blade 301c of upper cutter 301 and the blade 302b of lower cutter 302 overlap up and down and closed state in off-position.
From the blade 302b open mode of the blade 301c and the lower cutter 302 of upper cutter 301, because above-mentioned connection connecting rod 306 rearward slides, above-mentioned lower cutter connecting rod 305 shakes.Above-mentioned like this lower cutter 302 is that rotate at the center with above-mentioned segmentation screw 316, and the blade 302b of lower cutter 302 is moved to above-mentioned off-position.
And same owing to connect the slip of connecting rod 306, above-mentioned upper cutter connecting rod 304 shakes.Because upper cutter connecting rod 304 is connected with the base end part of upper cutter 301 is free to rotate, therefore upper cutter 301 is moved like this.So, inserting the segmentation screw 316 in the gathering sill 341, upper cutter 301 slides along gathering sill 341 relatively.And, insert the back shaft 318 in the gathering sill 340, relatively move with upper cutter 301.Then, because segmentation screw 316 and supporting axis 318 be fixed on the cutting knife installing plate 303, so the front end of upper cutter 301 walks out the L track of regulation, and the blade 301c of upper cutter 301 moves to off-position.
L describes with reference to Fig. 8 to this track.
As shown in Figure 8, the state of blade 302b to open of the blade 301c of upper cutter 301 and lower cutter 302, upper cutter 301 are on the position of standby the time, and the position of the front end of upper cutter 301 is position O, and the arbitrfary point on the above-mentioned track L is a some P.From position O to the axial distance of the Sewing machines of a P is D1 (displacement D1), from the position O of sewing arbor approximate vertical direction be distance D 2 (displacement D2) to the distance of a P.The ratio of distance D 1 and distance D 2 is D1/D2.At this moment D1＞D2.As above-mentioned example in the past, because (promptly with the pivot point of lower cutter 510, segmentation screw 511) for making upper cutter 509 rotations, the center moves, when the run trace of the front end of upper cutter 509 is compared during for circular arc, in the axial displacement of Sewing machines and bigger with the ratio D1/D2 of the displacement of this direction of principal axis vertical direction.
Above-mentioned gathering sill 340,341 has shape and direction that the front end that makes upper cutter 301 moved and walked out the L track.And upper cutter 301 from position of readiness (open mode) when off-position moves, the front end of upper cutter 301 is avoided above-mentioned left receiving plate 113 and is moved.
Below, the action of thread cutting device 37 is described.
At first, sewing is located on cloth pushing table 16 in the face of origin position, start the Sewing machines switch, cloth pushing table 16 advances to after the position of making beginning, moves the eyelet on sewing by eedle 14 and rotating shuttle along the shape that should cut off buttonhole.Eyelet is the front portion of the left parallel portion (the left parallel portion of line part) from buttonhole, and the rear portion of the right parallel portion of the rear portion of parallel portion, round hole part, line part revolution (right-hand rotation) is left finished in the front portion of right parallel portion and made.That is, the front portion of line part becomes the position of making terminal.In addition, also can carry out left side revolution makes.
Finished eyelet, cloth pushing table 16 is drawn back to the cloth off-position, and afterwards, hole-cutting device for cloth 19 actions form buttonhole with round hole part and line part incision.
After finishing incision, the clamping sewing is removed in left cloth-pressing device 102 and 202 actions of right cloth-pressing device.
Under this state, bottom line 51 and heart yearn 52 are being made between terminal and needle plate 21 and the heart yearn guiding mechanism, and roughly the direction of principal axis at Sewing machines is in extended state.At this moment, the blade 301c of the upper cutter 301 of thread cutting device 37 as Fig. 4 and shown in Figure 11, clamps bottom line 51 and heart yearn 52, is on the position of readiness with the blade 302b opposition side of lower cutter 302.
Then, the driving cylinder 307 of thread cutting device 37 is to the prescribed direction application of force, makes by tangent line crank connecting link 311 and tangent line drive link 312 to be connected connecting rod 306 and rearward to slide, and lower cutter connecting rod 305 shakes, and lower cutter is rotated.Simultaneously, upper cutter connecting rod 304 shakes, and upper cutter 301 moves and its front end is walked out track L.At this moment, as shown in figure 12, upper cutter 301, its blade 301c are near the Sewing machines axis, and the front end of upper cutter 301 is avoided left receiving plate 113, passes through near left receiving plate 113.
At this moment, connect connecting rod 306 and further rearward slide, make the mechanism's of the falling cloth 319 auxiliary catch bottom lines 51 and the heart yearn 52 (Figure 13) of the leading section that is arranged on upper cutter 301, prevent that simultaneously the blade 301c that sewing is involved in upper cutter 301 is cut off.Connect connecting rod 306 and further rearward slide, the blade 302b interlock (Figure 14) of the blade 301c of upper cutter 301 and lower cutter 302 finally coincide at off-position blade 301c and blade 302b, and bottom line 51 and heart yearn 52 are cut off (Figure 15).
Below, the effect and the effect of above thread cutting device 37 described.
When upper cutter 301 (coincide position) from the position of readiness to the off-position was mobile, segmentation screw 316 was done to slide relatively to upper cutter 301 in gathering sill 341, and supporting axis 318 is done to slide relatively to upper cutter 301 in gathering sill 340 simultaneously.If describe in detail, that is, as shown in Figure 9, when upper cutter 301 moved from the position of readiness to the off-position, segmentation screw 316 relatively moved to upper cutter 301 from end 341a side direction the opposing party's of a side of gathering sill 341 end 341b side.And when upper cutter 301 moved from the position of readiness to the off-position, supporting axis 318 relatively moved to upper cutter 301 from end 340a side direction the opposing party's of a side of gathering sill 340 end 340b side.This segmentation screw 316 and supporting axis 318 are fixed with respect to right cloth-feeding plate 201.So the front end of upper cutter 301 can move by walking out track L.That is, the blade 301c of upper cutter 301,, moves to off-position Yi Bian rotate Yi Bian retreat to off-position.
Therefore, for example, be center when rotating with same fulcrum with the rotating fulcrum of lower cutter than the upper cutter of above-mentioned example in the past, upper cutter 301 is when off-position moves, and the front end of upper cutter 301 is positioned at the rear of left receiving plate 113 front ends.So scope (the axial scope of Sewing machines) is bigger than above-mentioned example in the past before and after the blade 302b closure of the blade 301c of the upper cutter 301 between the front-end and back-end of left receiving plate 113 and lower cutter 302.
On the other hand, the blade 302b of lower cutter 302 is set in total length and the length its subtend that strides across this front and back scope.
But, according to the length (making length) of buttonhole line part (parallel portion), the terminal location difference of its stitch.If the length of line part is short, the terminal location of its stitch is in the rear, if the length of line part is long, the terminal location of its stitch is in the place ahead.Above-mentioned thread cutting device 37, because scope enlarges than above-mentioned example in the past before and after the blade 301c of upper cutter 301 and the blade 302b closure of lower cutter 302, therefore can make bottom line 51 and heart yearn 52 short and cut off, enlarge scope (cut-out scope) before and after it than example in the past from making the extended suture length of terminal (residue suture length).So,, can cut off bottom line 51 and the heart yearn 52 pairing length of making have broadened with this thread cutting device 37.The front and back scope that can cut off with the blade 302b of the blade 301c of upper cutter 301 and lower cutter 302 is, from the front end of left receiving plate 113 to upper cutter 301 with the longitudinal separation of the front end of the upper cutter 301 of lower cutter 302 when closed mutually.
And, for example, duration is arranged even make length, short sometimes, it makes terminal location beyond above-mentioned cut-out scope the time, and above-mentioned thread cutting device 37 also can cut off bottom line 51 and heart yearn 52.Promptly, as shown in figure 10, this thread cutting device 37, the installing hole 322 that (direction of principal axis of Sewing machines) distributes before and after being formed with on right cloth-feeding plate 201,322 ... the junction surface 303b of cutting knife installation portion 303 can change front and back on the installing hole 322 that engages, and can change the installation site of front and back with respect to the right cloth-feeding plate 201 of tangent line main frame 30 (upper cutter 301 and lower cutter 302).Like this, thread cutting device 37 can front and back change in the cut-out scope.That is, with the buttonhole that should make to make length corresponding, in advance the installation site, front and back of tangent line main frame 30 is carried out the front and back change, can make bottom line 51 and heart yearn 52 short, and can cut off from making the extended suture length of terminal (residue suture length).And when change during with installing hole 322 that junction surface 303b engages, corresponding its changes, and the installation portion 306a of installation tangent line drive link 312 also should change.
And, the lateral margin 302c that the lateral margin of the blade 302b of lower cutter 302 is relative with it is parallel, and because dog screw 326 is fixed with respect to right cloth-feeding plate 201, when the change of the installation site of above-mentioned tangent line main frame 30, there is no need to adjust the lateral margin of the blade 302b of lower cutter 302 to such an extent that continue with the lateral margin in above-mentioned right receiving plate 213 left sides.
And, for example, because the blade 302b of mill lower cutter 302, make between the lateral margin of blade 302b of the lower cutter 302 lateral margin 302c opposite and shorten with it, when upper cutter 301 and lower cutter 302 are opened, blade 302b just can not continue with the lateral margin in right receiving plate 213 left sides, cause produce in making make defective.But,, the lateral margin in blade 302b and right receiving plate 213 left sides is continued fix dog screw 326 because dog screw 326 can be free to slide with respect to right cloth-feeding plate about 201.
And, upper cutter 301 and lower cutter 302 are one with respect to cutting knife installation portion 303, so, during with respect to the right receiving plate 213 change installation sites of upper cutter 301 and lower cutter 302, there is no need the cutting knife pressure of upper cutter 301 and lower cutter 302 is adjusted.
The present invention not only is defined in the above embodiments, certainly does various changes in the scope that does not break away from aim.For example, also can make crooked shape, also can make rectilinear form, as long as the front end that this gathering sill 340,341 is sent as an envoy to upper cutter 301 is walked out the guiding shape of L track being arranged on gathering sill 340,341 on the upper cutter 301.
And, also upper cutter connecting rod 304 can connected on the connecting rod 306 with the direction of principal axis arrangement of predetermined distance along Sewing machines with the connecting portion that is connected connecting rod 306 with lower cutter connecting rod 305.It is corresponding with the installation site of cutting knife installation portion 303 that Here it is, and the installation site that connects connecting rod 306 and upper cutter connecting rod 304 and lower cutter connecting rod 305 is changed.
And, though the mobile of upper cutter 301 and lower cutter 302 realize by driving cylinder 307, also can be by solenoid, transmission devices such as motor are realized.
And, the foregoing description, it is the situation that thread cutting device 37 of the present invention is applicable to sewing machine for binding buttonhole, but, thread cutting device of the present invention is also applicable to the sewing machine for binding buttonhole of other shape buttonholes, or for have with at the suture of the formation stitch of making terminal location from left and right sides clamping and the upper cutter and the lower cutter that cut off, and the described terminal location of making of the suture that should cut off is on a straight line direction and stride across the Sewing machines of prescribed limit variable bit.
And the foregoing description is that thread cutting device 37 is arranged on the right cloth-feeding plate 201, also can make it is arranged on structure on the left cloth-feeding plate 101.
As mentioned above, according to the present invention 1 and 2, can make the thread cutter compact conformation, and And can enlarge the scope of tangent line.
And, according to the present invention 3, the front end of upper cutter is walked out aforesaid track and is made Cutting knife moves, for example, than upper cutter by with the same fulcrum of the rotating fulcrum of lower cutter centered by turn to When moving, the front end of the upper cutter the when blade of upper cutter and the blade of lower cutter are closed for example is positioned at Rear corresponding to the front position of left receiving portion. Blade and the incision of upper cutter have so just been enlarged The front and back scope that the blade of cutter can cut off. Like this, make length and can make residue corresponding to long Line is short and can cut off suture.
And, 4 thread cutter according to the present invention, when upper cutter from the release position to cutting off the position Put when mobile, the receiving plate of avoiding the opposing party moves along above-mentioned track, so, with upper cutter and lower The scope that cutting knife can cut off rearward enlarges. Like this, make length and can make corresponding to long The residue line is short and can cut off suture.
And 5 thread cutter according to the present invention is owing to have guiding upper cutter being provided with The gathering sill of the shape of the above-mentioned track of the front end edge of upper cutter walking, so that the structure of thread cutter Simplify. And, only with 2 gathering sills and 2 supporting axis upper cutter is moved along described track, So that the structure of thread cutter simplify. In addition, 3 same with according to the present invention enlarged The cut-out scope of cutting off of upper cutter and lower cutter. Like this, corresponding to the long length energy of making Enough make residue line weak point and can cut off suture.
And 6 thread cutter according to the present invention is because cutting knife gives directions parts to send being arranged on Fixed base on the cloth platform, but its installation site along sewing machine direction of principal axis free variation, so, make It is corresponding to the terminal location of making (making length), the blade of upper cutter and the blade of lower cutter The cut-out scope that can cut off can change along the sewing machine direction of principal axis. And, when change upper cutter and incision During the installation site of cutter, upper cutter and lower cutter can keep its roughly shape of original scissors, with The cutting knife supporting point part is together in the change of sewing machine direction of principal axis, so there is no need upper cutter and incision The cutting knife pressure of cutter is adjusted.
And 7 thread cutter according to the present invention is because upper cutter connecting rod and lower cutter connecting rod Connecting portion and with the connecting portion of drive source at least one party's the link position of connecting portion, can the edge Sewing machine direction of principal axis free variation, thus the axial position of the sewing machine of drive source needn't be changed, The position of upper cutter and lower cutter can be with upper cutter connecting rod and lower cutter connecting rod with respect to work feed Platform changes along the sewing machine direction of principal axis. That is, the installation site of upper cutter and lower cutter is being kept Roughly the shape of original scissors changes along the sewing machine direction of principal axis. So, make its correspondence make terminal The cut-out scope of the upper cutter of position and lower cutter can be along the change of sewing machine direction of principal axis, and not having simultaneously must To adjust the cutting knife pressure of upper cutter and lower cutter.
Claims (7)
1. the thread cutting device of a Sewing machines, have the suture that forms stitch is being made upper cutter and the lower cutter that also cuts off from left and right sides clamping on the final position, the described final position of making that should cut off suture can stride across the prescribed limit change with respect to a straight line direction, it is characterized in that, have: with respect to one fixedly straight line clamp suture, be supported on rotationally on the direction near upper cutter, can face the described lower cutter of making the full displacement scope of final position; Move with the described straight line direction in an edge, on one side the clamping suture, be supported on rotationally on the direction near lower cutter, and, along moving of a described straight line direction, corresponding to the described upper cutter of making the displacement scope of final position.
2. the thread cutting device of a Sewing machines, have the suture that forms stitch is being made upper cutter and the lower cutter that also cuts off from left and right sides clamping on the final position, the described final position of making that should cut off suture can stride across the prescribed limit change with respect to a straight line direction, it is characterized in that, have: with respect to one fixedly straight line clamp suture, be supported on rotationally on the direction near upper cutter, can face the described lower cutter of making the full displacement scope of final position; Move with the described straight line direction in an edge, on one side the clamping suture, be supported on rotationally on the direction near lower cutter, and, can regulate along the upper cutter of the moving range of a described straight line direction.
3. the thread cutting device of a Sewing machines, have push down with sewing position near the cloth presser of sewing, and between described cloth presser, have a portion of bearing that makes sewing be in clamp position, be loaded with described sewing simultaneously also along making the cloth pushing table that direction moves sewing, with be arranged on described cloth pushing table one side, and have and make that clamp near the final position will be from making the extended suture in final position and cutting off the upper cutter of this suture and the thread cutting device of lower cutter after finishing buttonhole, it is characterized in that, when the closing position that the blade of described upper cutter and the blade of lower cutter overlap up and down to the off-position at described suture from open mode moves, the track that the front end of described upper cutter is walked out, by the eedle position roughly along the axial displacement D1 of Sewing machines be approximately perpendicular to ratio D1/D2 between the described axial displacement D2, value when the track of walking out than the front end that with the rotating fulcrum of described lower cutter is this upper cutter of center when described upper cutter is rotated is circular arc is big, the mobile device that upper cutter is moved.
4. according to the thread cutting device of the Sewing machines described in the claim 3, it is characterized in that it is that boundary is divided into left and right sides receiving plate that the described portion of bearing is set to the Sewing machines axis by the eedle position; Under described upper cutter and described lower cutter open mode, described lower cutter, be arranged on front portion one side of a side receiving plate in the described left and right sides receiving plate that bears portion, the blade that can make described lower cutter is at described near axis and roughly along this axis direction, and, described upper cutter is set to extend to the opposing party's receiving plate front from the front of the receiving plate of a side; When described cut-out suture, by described cutting knife mobile device the blade of lower cutter is rotated near described axis, and, the blade that makes upper cutter is near described axis, and, make the described track of the extended front end edge of receiving plate one side that bears the opposing party of portion to described, the receiving plate of avoiding the opposing party moves.
5. according to the thread cutting device of the Sewing machines described in claim 3 or 4, it is characterized in that, on described upper cutter, the gathering sill that to be provided with 2 length directions be different directions; On the installation site of the described upper cutter of described cloth pushing table, be provided with 2 fulcrum shafts that insert respectively in the described gathering sill, 2 gathering sills that this fulcrum shaft inserted have when cutting off described suture, the guiding shape that the described track of front end edge of described upper cutter is moved.
6. the thread cutting device of a Sewing machines, have and to be loaded with described sewing and to make this sewing along the sewing machine for binding buttonhole of making the cloth pushing table that direction moves, be set in place described cloth pushing table one side below described sewing, after finishing buttonhole, will be from described sewing buttonhole make the extended suture in final position near described upper cutter and the lower cutter that cuts off approximate scissors shape the final position of making, it is characterized in that having: the cutting knife supporting point part that has the action fulcrum of described upper cutter and lower cutter; Be arranged on the described cloth pushing table, and, described cutting knife supporting point part is being installed, can freely change the fixed pedestal portion of the installation site of described cutting knife supporting point part simultaneously along the Sewing machines direction of principal axis.
7. according to the thread cutting device of the Sewing machines described in the claim 6, it is characterized in that, have: when cutting off described suture, make the blade of described upper cutter and lower cutter blade from the state of opening up to each other to overlapping the drive source that closing position moves up and down in described suture off-position; The upper cutter connecting rod that is rotatably connected with described upper cutter; The lower cutter connecting rod that is rotatably connected with described lower cutter; Be connected with described drive source, be connected with the lower cutter connecting rod with described upper cutter connecting rod again simultaneously, and make progress cutter connecting rod and lower cutter connecting rod transmission driving force, the connection connecting rod of slightly linearly action when transmission simultaneously; Described connection connecting rod, the connecting portion of itself and upper cutter connecting rod and lower cutter connecting rod and with the connecting portion of drive source at least one side's connecting portion, its link position can freely change along the direction of principal axis of described Sewing machines roughly.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35793399 | 1999-12-16 | ||
| JP357933/1999 | 1999-12-16 | ||
| JP2000380655A JP4686025B2 (en) | 1999-12-16 | 2000-12-14 | Sewing machine thread trimmer |
| JP380655/2000 | 2000-12-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1299897A true CN1299897A (en) | 2001-06-20 |
| CN1136346C CN1136346C (en) | 2004-01-28 |
Family
ID=26580693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001357247A Expired - Lifetime CN1136346C (en) | 1999-12-16 | 2000-12-18 | Thread-cutting device for sewing machine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4686025B2 (en) |
| CN (1) | CN1136346C (en) |
| CZ (3) | CZ302489B6 (en) |
| DE (1) | DE10063003B4 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354465C (en) * | 2001-10-15 | 2007-12-12 | 重机公司 | Thread cutting device for sewing machine |
| CN100359078C (en) * | 2003-10-30 | 2008-01-02 | 星锐缝纫机股份有限公司 | Automatic thread-cutting device for cylindrical sewing machine |
| CN100432317C (en) * | 2001-12-13 | 2008-11-12 | 重机公司 | Buttonhole stitching machine |
| CN1676722B (en) * | 2004-04-01 | 2011-07-13 | 杜尔克普-阿德勒股份公司 | Sewing machine |
| CN103361891A (en) * | 2012-03-29 | 2013-10-23 | 杜尔克普—阿德勒股份公司 | Thread cutting module of a machine for sewing a buttonhole with an eyelet |
| WO2022104854A1 (en) * | 2020-11-21 | 2022-05-27 | 吴江市震宇缝制设备有限公司 | Thread trimming mechanism of sewing machine for production of protective clothing |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3779912B2 (en) * | 2001-11-19 | 2006-05-31 | Ｊｕｋｉ株式会社 | Buttonhole sewing machine |
| JP3940588B2 (en) * | 2001-11-26 | 2007-07-04 | Ｊｕｋｉ株式会社 | Bobbin thread cutting machine |
| JP4760190B2 (en) * | 2005-07-28 | 2011-08-31 | ブラザー工業株式会社 | Thread trimming device for eyelet sewing machine |
| JP4737525B2 (en) * | 2005-08-29 | 2011-08-03 | ブラザー工業株式会社 | Eyelet hole sewing machine |
| JP4650169B2 (en) * | 2005-08-30 | 2011-03-16 | ブラザー工業株式会社 | Eyelet hole sewing machine |
| CN101722398B (en) * | 2008-10-31 | 2013-02-06 | 青特集团有限公司 | Production process of press-welding brake |
| JP2010213767A (en) | 2009-03-13 | 2010-09-30 | Juki Corp | Thread-cutting device of sewing machine |
| DE102017207627A1 (en) * | 2017-05-05 | 2018-11-08 | Dürkopp Adler AG | Assembly for creating a seam beginning upper thread with a desired seam projection |
| CN113584747A (en) * | 2021-08-24 | 2021-11-02 | 湖州冠炯机电科技有限公司 | Rope cutting device and rope embroidery machine |
| CN114427146B (en) * | 2022-01-26 | 2023-06-20 | 台州辉腾电子科技股份有限公司 | Three-dimensional sewing template machine capable of automatically cutting threads |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3812092A1 (en) * | 1988-04-12 | 1989-10-26 | Duerkoppwerke | BUTTONHOLE SEWING MACHINE WITH A THREAD SEPARATOR AND CLAMPING DEVICE |
| JPH02121692A (en) * | 1988-10-31 | 1990-05-09 | Juki Corp | Thread cutter for sewing machine with horizontal bobbin case |
| JPH0798115B2 (en) * | 1989-08-31 | 1995-10-25 | ジューキ株式会社 | Thread cutting device for eyelet sewing machine |
| JP2553236B2 (en) * | 1990-08-17 | 1996-11-13 | 株式会社テック | Dot printer |
| JP3147580B2 (en) * | 1993-05-07 | 2001-03-19 | アイシン精機株式会社 | Sewing machine thread trimmer |
| JP3426709B2 (en) * | 1994-05-30 | 2003-07-14 | ブラザー工業株式会社 | Eyelet overhole sewing machine thread trimming device |
| US5623887A (en) * | 1994-07-29 | 1997-04-29 | Tokai Kogyo Mishin Kabushiki Kaisha | Thread cutting device in sewing machine |
| DE19531727C2 (en) * | 1994-10-13 | 1999-09-30 | Duerkopp Adler Ag | Thread cutting device for a sewing machine |
| JP3594735B2 (en) * | 1996-05-14 | 2004-12-02 | ジューキ株式会社 | Sewing machine thread trimmer |
| DE19801226C1 (en) * | 1998-01-15 | 1999-08-12 | Duerkopp Adler Ag | Thread cutter, for button hole sewing machine |
-
2000
- 2000-12-14 JP JP2000380655A patent/JP4686025B2/en not_active Expired - Fee Related
- 2000-12-15 CZ CZ20004722A patent/CZ302489B6/en not_active IP Right Cessation
- 2000-12-15 CZ CZ2009-608A patent/CZ306917B6/en not_active IP Right Cessation
- 2000-12-15 CZ CZ2009-607A patent/CZ306625B6/en not_active IP Right Cessation
- 2000-12-16 DE DE2000163003 patent/DE10063003B4/en not_active Expired - Fee Related
- 2000-12-18 CN CNB001357247A patent/CN1136346C/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354465C (en) * | 2001-10-15 | 2007-12-12 | 重机公司 | Thread cutting device for sewing machine |
| CN100432317C (en) * | 2001-12-13 | 2008-11-12 | 重机公司 | Buttonhole stitching machine |
| CN100359078C (en) * | 2003-10-30 | 2008-01-02 | 星锐缝纫机股份有限公司 | Automatic thread-cutting device for cylindrical sewing machine |
| CN1676722B (en) * | 2004-04-01 | 2011-07-13 | 杜尔克普-阿德勒股份公司 | Sewing machine |
| CN103361891A (en) * | 2012-03-29 | 2013-10-23 | 杜尔克普—阿德勒股份公司 | Thread cutting module of a machine for sewing a buttonhole with an eyelet |
| CN103361891B (en) * | 2012-03-29 | 2017-04-26 | 杜尔克普—阿德勒股份公司 | Thread cutting module of a machine for sewing a buttonhole with an eyelet |
| WO2022104854A1 (en) * | 2020-11-21 | 2022-05-27 | 吴江市震宇缝制设备有限公司 | Thread trimming mechanism of sewing machine for production of protective clothing |
Also Published As
| Publication number | Publication date |
|---|---|
| CZ20004722A3 (en) | 2003-01-15 |
| JP2001232086A (en) | 2001-08-28 |
| JP4686025B2 (en) | 2011-05-18 |
| DE10063003B4 (en) | 2010-02-04 |
| CZ306625B6 (en) | 2017-04-05 |
| CZ306917B6 (en) | 2017-09-13 |
| CN1136346C (en) | 2004-01-28 |
| CZ302489B6 (en) | 2011-06-15 |
| DE10063003A1 (en) | 2001-10-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1136346C (en) | Thread-cutting device for sewing machine | |
| CN1039732C (en) | Work-sheet retaining apparatus | |
| CN101054760A (en) | Sewing machine | |
| CN1840763A (en) | Darning width adjusting device for sewing machine | |
| JP2014068722A (en) | Buttonhole sewing machine | |
| CN1144906C (en) | Cloth feeding device for sewing machine | |
| CN1141429C (en) | Rolled seam sewing machine | |
| CN101041925A (en) | Sewing machine | |
| CN1133770C (en) | Button holing sewing machine | |
| CN1394994A (en) | Pocket cloth supply device of sewing machine for sewing inlaid wrap | |
| CN115552065A (en) | Sewing machine | |
| CN1837443A (en) | Fillet sewing machine | |
| CN1389612A (en) | Thread-laying device for sewing machine | |
| JP4020692B2 (en) | Needle feed sewing machine | |
| CN1904178A (en) | Panel strip seamer | |
| CN1757811A (en) | Middle presser foot device of sewing machine | |
| CN1381627A (en) | Buttonhole machine | |
| CN1420224A (en) | Buttonhole sewing machine | |
| CN1542195A (en) | Sewing machine | |
| CN1611653A (en) | Automatic sewing machine | |
| CN1944751A (en) | Clamping foot device for edge sewing machine | |
| CN1644781A (en) | Bottom thread feeder of sewing machine | |
| CN1326024A (en) | Cloth cutter for buttonhole sewing machine | |
| CN1948584A (en) | Chain manner stitch seam button sewing machine and button sewing method | |
| CN1421562A (en) | Device for severing lower thread on button holes-sewing sewing machine and button holes sewing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20040128 |
|
| CX01 | Expiry of patent term |