CN1334368A - Oscillating shuttle for double-locked stitch sewing machine with sewing thread cutting device - Google Patents
Oscillating shuttle for double-locked stitch sewing machine with sewing thread cutting device Download PDFInfo
- Publication number
- CN1334368A CN1334368A CN01121827.4A CN01121827A CN1334368A CN 1334368 A CN1334368 A CN 1334368A CN 01121827 A CN01121827 A CN 01121827A CN 1334368 A CN1334368 A CN 1334368A
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- China
- Prior art keywords
- shuttle
- sewing
- suture
- inner part
- projection
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- Granted
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- 238000009958 sewing Methods 0.000 title claims abstract description 45
- 238000005520 cutting process Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000033001 locomotion Effects 0.000 claims description 11
- 230000000284 resting effect Effects 0.000 claims description 10
- 239000000284 extract Substances 0.000 claims description 4
- 201000007094 prostatitis Diseases 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 7
- 238000000605 extraction Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention relates to a looper (23) of a double backstich sewing machine having a thread cutting device (52), wherein the looper (23) is provided with a shuttle body having an inner member (25) and rotates around the vertical axis, the inner member stores the sewing thread (42) on loop discharge side (63). The looper for a double backstitch sewing machine has a closure (38) for providing insurance to the sewing thread (42) inside the inner member, in addition, a wedge projection (46) is arranged on the cover (38) for defining the additional draw-out sewing thread (42) in cutting process of sewing thread, by extracting the additional sewing thread (42), the reliable sewing mark may be formed from the beginning of the next sewing process.
Description
The present invention relates to a kind of by the described shuttle of claim 1 preamble with double-lock type stitch sewing machine of thread-cutting device.
By known this type of shuttle of DE 28 40 913 A1 (corresponding to US-PS 4 200 050).In order to implement the suture cutting-off process, when idle running is moved, take out the line cutter from the clamp position near the revolution of catching line position that is positioned at the pinprick, and then as working motion reversed turning again to the clamp position.Along with implementing working motion, extract sewing thread and extraction out from the pin cable guiding device and be stored in suture in the shuttle, and will be fixed in the tension disk from the line end that shuttle is drawn by means of the reverse cutter of fixed-site.
The problem that exists in this class process is that the remaining the end of a thread that stays on sewing will be lacked on the one hand, should be able to sew up reliably when the linear slit that the beginning next one will be made but then.It is little to adopt known Sewing machines can reach the residual length of line.Formed such one but then here and extended to the stitching line segment of clamp position, that is, can not guarantee the stitching reliably at the beginning of the linear slit that will sew at the next one with this line segment from suture outlet.This mass defect is flagrant in these linear slits especially, and promptly they also should satisfy the purpose of decoration except fixed function, promptly is this situation in the leather field of furniture for example.
By the known a kind of thread-cutting device that is used for double-lock type stitch sewing machine of DE 36 15 268 C2.In implementing the suture cutting-off process, by a sewing thread of taking out an additional amount of line device extraction that is connected with the motion knife rest.Here, suture is unaffected.
The shuttle that the purpose of this invention is to provide the described type of a kind of preface wherein begins to realize reliable stitching at a linear slit.Has the described feature of its characteristic for reaching this purpose in the shuttle as described in the preamble by claim 1 a kind of.Adopt by shuttle of the present invention, when taking out the working motion of line device, extract the suture of additional amount out, thus reliably guarantee to sew up once more, that is begin a new linear slit, this means that the needle tracking that first needle tracking of linear slit has correct enforcement forms.
By the feature of claim 2, provide a kind of favourable layout of projection with respect to the suture outlet.The feature of claim 3 causes a kind of shuttle simple in structure, and wherein shuttle is only by the latch lever axial relief.The favourable feature that further develops by claim 4 and 5 reaches.Design by claim 6 causes a kind of shuttle, and wherein, the lid that the inner part of shuttle is housed is realized by a cover.The advantage of bringing by the design of claim 7 is, got rid of basically being used for the influence of the shuttle function that needle tracking forms.
Further specify two embodiment of the present invention by means of accompanying drawing below.Wherein:
Fig. 1 Sewing machines front view;
Fig. 2 contains the shuttle by first kind of embodiment of the present invention corresponding to the Sewing machines partial enlarged drawing of view arrow II among Fig. 1;
Fig. 3 and Fig. 2 corresponding view represent that wherein taking out the line cutter is in another position;
Fig. 4 presses the amplification view of cutting line IV-IV among Fig. 3;
The view that the modified form of implementation of Fig. 5 is corresponding with Fig. 2 and 3;
Second kind of embodiment single part of Fig. 6 front view; And
Part shown in Fig. 7 Fig. 6 is pressed the side view of the view arrow VII among Fig. 6.
Sewing machines 1 has a base plate 2 and the horn 4 behind upwardly extending main chamber 3 of base plate and the knuckle, and horn terminates in the head 5.Various assemblies are housed below base plate 2, and the back also can illustrate.Rotatably mounted horn axle 6 in horn 4, it drives the crank mechanism 7 of a band thread take-up tension lever 8 in head 5.Crank mechanism 7 is being connected with a shank 9 that can support movably in head 5 aspect the transmission, and there is pin 10 the shank lower end.Therefore pin 10 can be moved up and down along vertical axis 11 by crank mechanism 7 transmissions.Pin 10 is guided the line of being supplied with by bobbin 12 in a pinprick, hereinafter it is called sewing thread (Nadelfaden) 13.
The needle plate 15 that base plate 2 has a backing plate face 14 and is screwed, its upper surface constitutes the backing plate 16 that is placed on the sewing 17 above it.Backing plate 16 is arranged as perpendicular to axis 11 and extends.Needle plate 15 is shaped on a groove 18 that is run through by feed dog 19, and feed dog is useful on the pinprick 20 by pin 10.Feed dog 19 couples together in transmission with the feeding and the elevating drive mechanism that are located at below the base plate 2 in the known manner.In addition, needle plate 15 has two projections 21,22 in its downside design.
Shuttle 23 is below needle plate 15, and it is equipped with an inner part 25 that is contained in the shuttle body 24.Shuttle body 24 is connected with axle 26 usefulness screws, and axle 26 has 11 axis 27 that extend that parallel to the axis.Axle 26 can be rotated to support on one with bearing block 28 that base plate 2 usefulness screws are connected in.In bearing block 28 inside a gear drive is arranged, it has a driving shaft 29.Driving shaft 29 couples together with horn axle 6 in transmission by toothed belt transmission 30.The gearratio of toothed belt transmission 30 is 1: 2.This means that shuttle 23 takes two turns when horn axle 6 turns around.
Shuttle body 24 is designed to a jar shape, and design has a spur 31 on its circumference.In addition, on the shuttle body, be shaped on groove 32, rotatably mounted the supporting rib 33 of inner part 25 in the groove.32 designs have different interruptions and breach to supporting rib 33 with groove.In assembled state, groove 32 is partially enclosed by a bezel ring, that is screwed 34, so inner part 25 rotatably remains in the shuttle body 24.
Inner part 25 is designed to the jar shape at edge 35, on bottom 36, be provided with a cylindrical journal 37, the blind hole that extends internally from the end in axle journal 37 (indicating), the end of latch lever 38 is bearing in this blind hole pivotally by the pin of a horizontal expansion.The end that latch lever 38 is contained in the blind hole is in one by under the spring-loaded pressing means effect, so latch lever 38 can be positioned on closing position 39 and enable possition 40.Closing position 39 usefulness solid lines are represented in Fig. 4, and enable possition 40 usefulness chain-dotted lines are represented.
Adorned a shuttle 41 that can be rotated to support on the axle journal 37 in inner part 25, siding is wound on the shuttle, and the back claims that this line is a suture (Greiferfaden) 42.Inner part 25 is shaped on an outstanding flange 43, has wherein designed a groove 44.The free end 45 of latch lever 38 leans on flange 43 in this groove 44 when closing position 39 mutually.Establish a projection 46 on latch lever 38, it is designed to towards the end 45 direction wedge shape ground raise (Fig. 4).In closing position 39, projection 46 extends back to that side of shuttle 41 at latch lever 38.
Designed a seam 47 that semicircle outlet 48 is arranged in the zone of groove 44, the line segment 49 of suture 42 is drawn from exporting 48.In addition, latch lever 38 45 is shaped on semicircle breach 50 in the end, and its constitutes the border of outlet 48.
Establish an attaching clamp 51 that radially extends on this external inner part 25, it is contained between the projection 21,22 with a gap.
Establish a thread-cutting device 52 on bearing block 28, it has one can take out line cutter 55 being screwed in the axle upper end around the rotating axle 54 and of axis 53.Taking out the line cutter has the part 56 of a knuckle in free end design, and it catches line hook and tangent line sword (both are expression all).Here be designed to, take out line cutter 55 and can catch line position 57 (Fig. 3) and resting position (Fig. 2) by means of drive unit arrival.
Thread-cutting device 52 has a support 59, and it is screwed on bearing block 28.Free end at support 59 has a cutter 60 and a clamp that is screwed 61 that is screwed invariant position.Cutter 60 and clamp 61 are arranged as the knuckle part 56 of taking out line cutter 55 are between cutter 60 and the clamp 61 in resting position.
Except this particular design of latch lever 38, (Teile-Nr.:0791767742 is known Ausg./Edition:08/98) to shuttle 23 with relevant specification by commercial general Sewing machines (D rkopp Adler Klasse 767) with thread-cutting device 52.
During Sewing machines 1 operation, the line segment 49 of suture 42 upwards extends by breach 50 from exporting 48, and extends to sewing 17 places that are placed on the needle plate 15 by pinprick 20 therefrom.Specifically, if feed dog 19 is implemented its idle running motion, sewing 17 is placed on the needle plate 15 when the corner of a regulation of horn axle 6.When the sewing 17 of feed dog 19 above being placed on it implemented its feed motion, be placed on the feed dog 19 at a corner sewing 17 of horn axle 6.This working method is known by the Sewing machines that adopts so-called pin transmission (Nadeltransport) to process.Fig. 3 represents the position of The initial segment 49.It is corresponding to the trend of drawn straight line G1 among Fig. 2, and it extends by pinprick 20 and outlet 48.In service at Sewing machines 1, take out line cutter 55 and be in resting position represented among Fig. 2 58.
Based on the direction of rotation 62 (Fig. 2) of shuttle body 24, accept a coil (not shown) that forms by sewing thread 13 by spur 31.Coil is accepted side 63 by spur 31 extractions at the coil of shuttle 23 and is carried out.Coil accept side 63 in Fig. 2, be in straight line G2 above, straight line G2 extends by the center of pinprick 20 and axle journal 37.The coil that is released in of coil draws off side 64 and carries out, in Fig. 2 it be in straight line G2 below.
In service at Sewing machines, projection can not hinder the coil of sewing thread around inner part at all.Moreover the height of projection is designed to, and makes on the one hand to take out that line cutter 55 can be implemented its working motion and the danger that no conflict occurred.Guarantee that on the other hand shuttle 41 can be with a gap by in latch lever 38 part 25 taking-ups internally that are in enable possition 40 or the inner part 25 of packing into.
After the sewing process finishes, carry out the suture cutting-off process, take out line cutter 55 for this reason and be turned back to from resting position 58 and catch line position 57.On knuckle part 56, catch the line hook by means of design, arrest sewing thread 13 in the known manner around the part of inner part 25 guidings and the line segment 49 of suture 42.Along with the revolution of axis cutter 55 towards resting position 58 directions, line segment 49 is further extracted out, therefore extracts the suture 42 of ormal weight out from shuttle 41.This process is carried out so for a long time, till when taking out line cutter 55 and be in its resting position 58, finally disconnect sewing thread 13 and suture 42 by dissection thus at cutter 60 places of fixed-site, meanwhile clamp the suture 42 that extends towards outlet 48 direction, so there is a line segment 65 to walk around the projection 46 that is on the latch lever 38 and above shuttle 41, extend now towards clamp 61 directions from exporting 48.As shown in Figure 2, the line segment 65 that extends around projection 46 has the shape of knuckle, thereby has extracted the suture 42 of an additional amount out.
When adopting known shuttle on the Sewing machines of the double-lock type stitch with thread-cutting device, the line segment of clamping in clamp extends by straight line G3, and this straight-line pass outlet 48 and the clamp point on clamp 61 extend.Straight line G1, G3 and edge 35 surround a zone 66, it the shape of a secter pat is arranged substantially and in Fig. 2 hatching represent.This zone 66 is characterized in the range of movement of inner part 25 tops, when taking out line cutter 55 and move to resting position 58 from catching line position 57, and suture 42 inswept these range of movement.
By configuration projection in this range of movement 66 of suture 42, make to be ready to stand-by line segment 65 an additional line amount is arranged, so the reliable needle tracking of the assurance at the beginning of linear slit forms in sewing process next time.
Fig. 5 has represented a kind of remodeling to the foregoing description, and wherein identical structure division is with same label and add apostrophe " ' " expression in the back.Here, latch lever 38 ' design have projection 46 ', wherein, an end that comes to a point gradually 45 of latch lever 38 ' have ', it is arranged in the gap zygonema and is designed to the outlet 48 in hole ' have a distance.By latch lever 38 ' relevant projection 46 ' this configuration, extracted out have more substantial sutural line segment 64 '.With projection 46 ' with respect to outlet 48 ' be about 15 degree by angle W to be arranged in and to have confirmed in the real work to be suitable for.
Represented second kind of embodiment by Fig. 6 and 7, corresponding with embodiment 1 here structure division is with same label and add " a " expression.Inner part 25a seals with cover 67, and it is connected with inner part 25a is removable by latch lever 68.Cover 67 constitutes a lid that is used to the shuttle 41a insurance that is contained in the inner part 25a below it.On cover 67, establish upwardly extending projection 46a.In service at Sewing machines, line segment 49a extends to pinprick 20a from an outlet 48a who is designed to the hole, and here, pinprick 20a is located at a design has regular contactor to transmit, that is in the needle plate 69 of the fixing Sewing machines of pin.After finishing the suture cutting-off process, line segment 64a still by projection 46a with the shape of knuckle and thereby add longways and draw from outlet 48a.
Claims (7)
1. the shuttle (23) that has the double-lock type stitch sewing machine (1) of a thread-cutting device (52), wherein, Sewing machines (1) have one can be along vertical axis (11) the move up and down pin (10) of guiding sewing thread (13), have one to have a pinprick (20 that is used for by pin (10) with axis (11) layout that meets at right angles; Sewing backing plate (15 20a); 19), and there is one to have the thread-cutting device (52) of taking out line cutter (55), taking out the line cutter can move to around the axis of rotation (53) that parallel to the axis (11) are arranged and catch line position (57) and resting position (58), and it accepts clamp (61) interlocking of side (63) in resting position (58) with being contained in shuttle (23) coil, and this shuttle (23) has following characteristics:
-be contained in parallel to the axis (11) rotation axle (26) on shuttle body (24) a jar shape inner part (25 is arranged; 25 '; 25a);
-inner part (25; 25 '; 25a) cylindrical journal (37) is arranged, the shuttle (41) that is wound with suture (42) is installed round axle journal with one heart;
-inner part (25; 25 '; 25a) there is one to be positioned at the outlet (48 that shuttle (23) coil draws off side (64); 48 '; 48a), suture (42) exports thus upwards and discharges;
-shuttle (23) has a lid (38 that is connected with axle journal (37); 38 '; 67), be used to prevent at inner part (25; 25 '; Shuttle 25a) (41) axial dipole field is characterized by: lid (38; 38 '; 67) projection (46 is arranged; 46 '; 46a), it extends in suture (42) motor area (66) that suture (42) passes through by to the taking out line cutter (55) and extract out of resting position (58) motion the time, so suture (42) is designed to after implementing suture tangent line process from exporting (48; 48 '; 48a) around projection (46; 46 '; 46a) extend to clamp (61) direction.
2. according to the described shuttle of claim 1, it is characterized by: projection (46; 46 '; 46a) be arranged in along shuttle body (24) direction of rotation (62) in outlet (48; 48 '; 48a) rear size is that 10 to 75 angles of spending (W) are located.
3. according to claim 1 or 2 described shuttles, wherein be stamped latch lever (38; 38 '), it can be turned back to axle journal (37) end that closing position (39) and enable possition are bearing in inner part (25) (40), and its free end (45) draws off side (64) direction towards coil and extend, and it is characterized by: projection (46; 46) be located on the latch lever (38).
4. according to the described shuttle of claim 3, it is characterized by: latch lever (38; 38 ') end (45) in closing position abuts in the groove (44) of inner part (45), and it have one the guiding suture (42) breach (50).
5. according to the described shuttle of claim 3, it is characterized by: the end (45) of latch lever (38) constitutes the border of outlet (48) in closing position (39).
6. according to the described shuttle of claim 2, wherein, be stamped the cover (67) of a closed container shape inner part (25a), it is characterized by: projection is located on the cover (67).
7. according to the described shuttle of one of all claims 2 to 6 in prostatitis, it is characterized by: projection (46; 46 '; 46a) be designed to raise along with the increase from axis (27) distance is wedge shape ground.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10035819.5 | 2000-07-22 | ||
| DE10035819A DE10035819C1 (en) | 2000-07-22 | 2000-07-22 | Looper for a double backstitch sewing machine, has a projection at the looper closure to hold the lower thread in position after cutting, for correct stitching on resumption of sewing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1334368A true CN1334368A (en) | 2002-02-06 |
| CN1318671C CN1318671C (en) | 2007-05-30 |
Family
ID=7649914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011218274A Expired - Lifetime CN1318671C (en) | 2000-07-22 | 2001-06-27 | Oscillating shuttle for double-locked stitch sewing machine with sewing thread cutting device |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1318671C (en) |
| DE (1) | DE10035819C1 (en) |
| IT (1) | ITMI20011516A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058922B (en) * | 2006-04-21 | 2012-05-09 | 杜尔克普-阿德勒股份公司 | Lock-type chain stitch sewing machine |
| CN101392439B (en) * | 2007-09-20 | 2012-09-05 | Juki株式会社 | Sewing machine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202006009410U1 (en) * | 2006-04-21 | 2007-08-30 | Dürkopp Adler AG | Thread-pulling knife for a sewing machine |
| DE102015111580A1 (en) | 2014-08-05 | 2016-02-11 | Cm Cerliani S.R.L. | Gripper for a lockstitch sewing machine with stable tension of the bobbin thread |
| DE102017201929A1 (en) * | 2017-02-08 | 2018-08-09 | Dürkopp Adler AG | A lockstitch sewing machine and method for creating a seam-starting top thread with a low desired seam overhang |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3424116A (en) * | 1965-08-25 | 1969-01-28 | Union Special Maschinenfab | Thread cutoff device for lockstitch sewing machines |
| US3503355A (en) * | 1967-10-10 | 1970-03-31 | Kochs Adler Ag | Thread cutting device for lockstitch sewing machines |
| IT1126288B (en) * | 1977-09-27 | 1986-05-14 | Necchi Spa | THREAD CUTTER DEVICE IN SEWING STITCHED MACHINES |
| DE19801226C1 (en) * | 1998-01-15 | 1999-08-12 | Duerkopp Adler Ag | Thread cutter, for button hole sewing machine |
-
2000
- 2000-07-22 DE DE10035819A patent/DE10035819C1/en not_active Expired - Lifetime
-
2001
- 2001-06-27 CN CNB011218274A patent/CN1318671C/en not_active Expired - Lifetime
- 2001-07-17 IT IT2001MI001516A patent/ITMI20011516A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058922B (en) * | 2006-04-21 | 2012-05-09 | 杜尔克普-阿德勒股份公司 | Lock-type chain stitch sewing machine |
| CN101392439B (en) * | 2007-09-20 | 2012-09-05 | Juki株式会社 | Sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| ITMI20011516A0 (en) | 2001-07-17 |
| ITMI20011516A1 (en) | 2003-01-17 |
| DE10035819C1 (en) | 2001-11-15 |
| CN1318671C (en) | 2007-05-30 |
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| 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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070530 |