CN101372797B - Sewing machine and method for sewing a beginning of a seam with such a sewing machine - Google Patents
Sewing machine and method for sewing a beginning of a seam with such a sewing machine Download PDFInfo
- Publication number
- CN101372797B CN101372797B CN2008102133267A CN200810213326A CN101372797B CN 101372797 B CN101372797 B CN 101372797B CN 2008102133267 A CN2008102133267 A CN 2008102133267A CN 200810213326 A CN200810213326 A CN 200810213326A CN 101372797 B CN101372797 B CN 101372797B
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- Prior art keywords
- needlework
- thread
- folders
- anchoring
- tensioning device
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B47/00—Needle-thread tensioning devices; Applications of tensometers
- D05B47/04—Automatically-controlled tensioning devices
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B1/00—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both
- D05B1/02—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both for making single-thread seams
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B19/00—Programme-controlled sewing machines
- D05B19/02—Sewing machines having electronic memory or microprocessor control unit
- D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B19/00—Programme-controlled sewing machines
- D05B19/02—Sewing machines having electronic memory or microprocessor control unit
- D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
- D05B19/14—Control of needle movement, e.g. varying amplitude or period of needle movement
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B47/00—Needle-thread tensioning devices; Applications of tensometers
Abstract
This invention refers to a sewing machine with thread (9) supplier. A needle rod (7) with sewing needle (8) is used for guiding the thread to pass through the textile fabric. A thread hook (10) is used for hooking the thread in the forming period of thread track. A first thread clamp (14) is arranged in a supply side route of the thread between the thread hook and a thread rod (18). A main stringing device (21) is arranged in the supply side route line of the thread at the upper reach of the first thread clamp. A second thread clamp (28) capable of actuating is arranged in the supply side route passage of the thread (9) at the upper reach of the main stringing device (21). A thread drawing device (24) is arranged between the thread rod and the second thread clamp. The thread drawing device can controllably move between the neutral position and the thread drawing position, wherein at the thread drawing position, the passage of the thread is the thread passage difference which is longer than the passage of the neutral position, therefore, a short section of thread (9) projecting from the textile fabric at the sewing starting position is realize in the mode of reliable operation.
Description
Technical field
The present invention relates to a kind of Sewing machines, this Sewing machines comprises: the needlework supply; Comprise the shank for the sewing needle of guiding needle thread passing fabric, wherein, sewing needle can be driven between bottom dead centre and top dead-centre and vertically move up and down; Be used for the stumble line hook of needlework of during stitching forms hook; Be used for making needlework to form the thread take-up tension lever of ring; The first actuatable needlework folder between online hook and the thread take-up tension lever in the supply side travel path of needlework; And, the main wire tensioning device in the needlework supply side travel path of the first needlework folder upstream, wherein, main wire tensioning device applies the line tension of scheduled volume to needlework in the actuating state of main wire tensioning device.The invention still further relates to a kind of method of using this stitching sewing machine linear slit beginning.
Background technology
The Sewing machines of this general type is known from DE 10234251 A.That wherein describes is used for the measure of the free line end pull back of needlework very general.
Summary of the invention
Therefore, the objective of the invention is to operate reliable mode and realize that a bit of needlework are outstanding from fabric in linear slit beginning place, wherein this will spend in the less situation in structure aspects and realize.
According to the present invention, realize described purpose by a kind of Sewing machines, this Sewing machines is characterised in that, comprise: activatable the second needlework folder that is arranged in the supply side stroke route of needlework in main wire tensioning device upstream, be arranged between thread take-up tension lever and the second needlework folder and be in anchoring in the stroke route of needlework, this anchoring can controllably move between neutral position and backguy position, in this neutral position, needlework are advanced along the First Line path between thread take-up tension lever and the main wire tensioning device, in this backguy position, needlework are advanced along the second thread path between thread take-up tension lever and the main wire tensioning device, and described the second thread path is that to be longer than the thread path in First Line path poor.
The present invention is based on the following fact: the anchoring between thread take-up tension lever and the second needlework folder can make the excessive line that causes when thread take-up tension lever moves downward be left the thread take-up tension lever zone towards the pulling of needlework supply, wherein, when sewn seams at the first bruss, needlework are pulled in the fabric by thread take-up tension lever, and its degree is so that only there is the free end of a bit of needlework-be line-be left in linear slit beginning place outstanding from fabric.For this reason, needlework are pulled certain distance, and it is poor that this distance equals the thread path that caused by anchoring.Obtain thus a visually agreeable linear slit beginning, and need not further to shorten by cutting off described free end the outstanding free end of needlework.This is favourable in the application for the visual quality special concern of linear slit especially, for example when making leather when being used for interior vehicle components.Anchoring can be designed to press from both sides the parts that separate with activatable the second needlework.For example, anchoring can be designed to cooperate with the needlework that move between thread take-up tension lever and main wire tensioning device drags the line device.
Anchoring is arranged in the needlework travel paths between main wire tensioning device and the second needlework folder and is proved to be advantageous particularly.
The thread path that causes by the layout of anchoring-this layout so that by the motion between neutral position and backguy position is poor to equal that thread path that about 20mm-causes is poor to cause visually agreeable linear slit.According to the application of Sewing machines, it is contemplated that also other thread path is poor.
Can the effort with a small amount of structure aspects be combined with anchoring in the needlework pilot unit, this anchoring comprises a pivotable support, is provided with the line hole in this bracket end.
The different backguy position of can be as required setting by the automatic motion of anchoring-wherein, for the amount of variant backguy position line path difference different-pulling that can make needlework begin to locate at linear slit adapts to rim condition separately.These the backguy positions that can set as required can automatically be changed especially, thus make it possible to one of poor according to a plurality of possible thread paths of the needs automatic setting on the Sewing machines.This can realize in a controlled manner, for example, and the sewing program separately of selecting according to the operator.Then the change of this position is undertaken by the controlled driving of anchoring.
The electromagnetic driver that be used for to change anchoring guarantees simultaneously that to operate reliable and the effective mode of cost realizes the position changes fast.Perhaps, also can imagine air impeller or stepper motor to be used for making the anchoring motion.
The layout of anchoring-this layout so that this anchoring be installed on the clamping plate of the second needlework folders-so that anchoring and the second needlework folder can be combined in the unit, can be mounted together.
With top described corresponding about installing, described method comprises the steps: according to the advantage of the method for stitching sewing machine linear slit of the present invention beginning in use
-form wire loop by the shank of lifting band sewing needle, described shank upwards is lifted to one-tenth between bottom dead centre and the top dead-centre journey position of going in ring from bottom dead centre, wherein, when described lifting occurs, the first and second needlework double-layered quilts open to discharge needlework, main wire tensioning device activated, and anchoring is in the neutral position;
-after the one-tenth that arrives shank goes in ring the journey position, controllably activate the clamp position of the first and second needlework folder, and make main wire tensioning device ineffective, so that needlework are not tensioned;
-activate wire clamp and make main wire tensioning device ineffective after, make anchoring from shift-in backguy position, neutral position, when being lowered with convenient thread take-up tension lever, the needlework between thread take-up tension lever and the first needlework folder shorten;
-controllably activate subsequently the unwrapping wire position of the first and second needlework folder, and activate main wire tensioning device and make anchoring return the neutral position.
When forming first ring, the actuating of anchoring only occurs in each linear slit beginning, and this has been avoided anchoring to make unnecessary actuating in the process after initial stitching.When forming the first stitching, in other words, in the linear slit beginning, anchoring activated.Preferably, the whole sequence of this first stitching is carried out with the rotating speed of determining of arm axle, and the rated speed of described rotating ratio arm axle is slow.
Activate at the same time wire clamp and make main wire tensioning device ineffective after, be used for to change that the time lag of the position of anchoring-wherein said time lag is determined by Sewing machines and have nothing to do-be proved to be with the rotating speed of arm axle and be suitable for guaranteeing that operating reliable needlework in linear slit beginning place spurs sequence.In order to ensure reliably pulling of operation, time lag should not drop on and be lower than specific minimum of a value.
Be defined as that anchoring activates wire clamp at the same time and when making the ineffective rear about 50ms of main wire tensioning device the absolute time lag of shift-in backguy position be proved to be the reliably operation that is particularly suitable for guaranteeing anchoring.
Description of drawings
The below illustrates in greater detail embodiments of the invention by means of accompanying drawing, in the accompanying drawings:
Fig. 1 illustrates the front perspective view of Sewing machines;
Fig. 2 illustrates according to the needlework guidance unit of the Sewing machines of Fig. 1 thin section when " 205 ° of belt journeys " arm axle position with the ratio of amplifying;
Fig. 3 the needlework guidance unit is shown with the similar view of Fig. 2, wherein compare with Fig. 2 and removed some parts;
Fig. 4 illustrates according to the needlework guidance unit of the Sewing machines of Fig. 1 thin section when " 225 ° of anchorings activated " arm axle position with the ratio of amplifying;
Fig. 5 the needlework guidance unit is shown with the similar view of Fig. 4, wherein compare with Fig. 4 and removed some parts;
Fig. 6 illustrates according to the needlework guidance unit of the Sewing machines of Fig. 1 thin section when " 305 ° of anchorings return fully " arm axle position with the ratio of amplifying;
Fig. 7 the needlework guidance unit is shown with the similar view of Fig. 6, wherein compare with Fig. 6 and removed some parts;
Fig. 8 illustrates according to the needlework guidance unit of the Sewing machines of Fig. 1 thin section when " 0 ° of shank top dead-centre " arm axle position with the ratio of amplifying;
Fig. 9 illustrates according to the needlework guidance unit of the Sewing machines of Fig. 1 thin section when " 65 ° of thread take-up tension lever top dead-centres " arm axle position with the ratio of amplifying;
Figure 10 the needlework guidance unit is shown with the similar view of Fig. 9, wherein compare with Fig. 9 and removed some parts;
Figure 11 illustrates along the schematic diagram of the linear slit plane that is limited by needlework and bobbin thread by the vertical section of two-layer fabric, and wherein initial linear slit part as seen.
The specific embodiment
Sewing machines 1 has the infrabasal plate 3 of a upper arm 2 and a shelly, and they link to each other to form C-form stand by column 4.Arm axle 5 (seeing Fig. 2) is installed in arm 2, and described arm axle 5 can drive to rotate with being contained in the belt driver in the column 4 by means of motor.Be connected with central control unit 6 on the described motor, this central control unit schematically illustrated one-tenth in Fig. 1 is arranged in upper arm 2, but also this central control unit can be arranged in other position, or even in Sewing machines 1 outside, and for example be connected to Sewing machines by cable.Shank 7 is driven by arm axle 5 and moves up and down, and this shank lower end is fixed with pin 8.Needlework 9 (seeing Fig. 2) pass the eyelet of pin 8.
Arrange wired hook 10 in substrate 3, wherein, line hook 10 can drive to rotate around vertical rotation 11 (seeing Fig. 2), and this rotatablely moves and comes from a usual manner arm axle 5.Be positioned with bobbin thread supply 13 (seeing Figure 11) in the line shuttle box of online hook 10 or the Wiinding cartridge 12.
Fig. 2 is shown specifically needlework 9 and how is conducted through Sewing machines 1.Along the needlework supply side stroke relative with the needlework direction of feed, namely along updrift side, look from the eyelet of pin 8, be provided with the first needlework folder 14, this first needlework folder comprises the clamping plate 15 that can be shifted with respect to its base portion body 16.The first needlework folder 14 is connected to control module 6 allowing signal exchange, thus this first needlework folder 14 therein needlework 9 be clamped in the first needlework folder 14 the position the first clamp position and wherein the first needlework folder 14 discharge between the unwrapping wire position of needlework 9 and be shifted.Near the first needlework folder 14, needlework 9 are substantially vertically advanced.
Can limit the passage that needlework 9 pass the first needlework folder 14 by means of a plurality of threading openings 17 in the base portion body 16.In illustrated embodiment, needlework 9 pass second threading opening 17 in right side, and this threading opening 17 is perpendicular to one of four threading openings of total of line direction of feed layout.
The upstream of the first needlework folder 14 is provided with thread take-up tension lever 18, and moving up and down of this thread take-up tension lever also realizes by arm axle 5 in a known way.Between the thread take-up tension lever hole 19 of the free end that is arranged on thread take-up tension lever 18 and the first needlework folder 14, needlework 9 also pass the bullport 20 that is arranged on according to the upper end of the base portion body 16 of Fig. 2.
In the upstream of thread take-up tension lever 18, needlework 9 pass main wire tensioning device 21.Described main wire tensioning device 21 comprises two main turnbuckles 22, and they move with known manner, and directly in succession arranges on the needlework direction of feed.Main wire tensioning device 21 is connected to central control unit 6, in order to allow the exchange signal.When being activated by control module 6, main turnbuckle 22 acts on the line tension of needlework 9 to realize determining.
Between main wire tensioning device 21 and thread take-up tension lever 18, needlework 9 pass another bullport 23, and this bullport can be shifted in the mode that can set perpendicular to the needlework direction of feed.
Provided upstream at two main turnbuckles 22 is equipped with anchoring 24.Anchoring 24 has pivotable support 25, and this support is hinged to the clamping plate 27 of the second needlework folder 28 by hinge connector 26.Therefore anchoring 24 is installed to the clamping plate 27 of the second needlework folder 28.At its free end, the support 25 of anchoring 24 has the line hole 29 that can be shifted perpendicular to the travel path of needlework 9 between upstream master's turnbuckle 22 and the second needlework folder 28.Support 25 can move between neutral position shown in Figure 2 and backguy position shown in Figure 4, wherein, the thread path of needlework 9 between main wire tensioning device 21 and the second needlework folder 28 is poorer than the thread path of the circuit path length of the correspondence of needlework 9 in the neutral position of support 25.In described embodiment, this thread path is poor for example to equal 20 millimeters.
Between the line hole 29 of neutral position and upstream master's turnbuckle 22 and this line hole 29 and the second needlework folder 28, be equipped with a wire pin 31 along the travel path of needlework at an installing plate 30, this installing plate 30 is installed on the arm 2.In the backguy position of support 25, needlework 9 pass through these two wire pins 31, and pass through diagonally the line hole 29 of support 25 between described wire pin.These two wire pins 031 have guaranteed no matter support 25 is in the backguy position and still have been positioned at the neutral position that needlework 9 all can pass from the second needlework folder 28 in same point before entering upstream master's turnbuckle 22.
Provided upstream at the second needlework folder 28 is equipped with pre-wire tensioning device 32, and this pre-wire tensioning device is in a known way operation also, and can be connected to control module 6 to allow the exchange signal.Along wire pin 31, comprise two main turnbuckles 22 main wire tensioning device 21, comprise that the second needlework folder 28 of anchoring mounted thereto 24 and pre-wire tensioning device 32 also are attached to installing plate 30.
In the upstream of pre-wire tensioning device 32, needlework 9 pass a threading opening 33, and this threading opening is formed in the about 90 ° upper edge region of the bend forward of installing plate 30 (seeing Fig. 2).Be equipped with line shuttle as the needlework feeding mechanism-be not shown specifically in the provided upstream of threading opening 33.
Fig. 2 to 10 illustrates the instantaneous position of rotation of arm axle 5.Be provided with angle scale 35 at the handwheel 34 that is fixed in arm axle 5 ends and sentences therewith rotation, angle scale 35 is divided into 360 calibration, so that the complete rotation of indication arm axle.Each position, angle of angle scale 35 illustrates in the following description.
Fig. 2 and 3 illustrates 205 ° of arm axle 5 positions.In this position, shank 7 is again mobile slightly to be left it and is positioned at 180 ° of bottom dead centres of locating, thereby forms wire loop 36 near the eyelet of pin 8.205 ° of positions, the bill 37 of line hook 10 can engage wire loop 36 to pull needlework 9.
In Fig. 3, with a line fabric plane N E is shown.This line lies in the position on the needle plate 39 of Sewing machines 1 corresponding to fabric 38.
205 ° of positions, the first needlework folder 14 is in the clamp position.Main wire tensioning device 21 is inoperative, so needlework 9 not tensionings.Anchoring 24 is in the neutral position.The second needlework folder 28 is in the clamp position.Pre-wire tensioning device 32 works, so tensioning between needlework 9 online shuttles and the pre-wire tensioning device 32.Thread take-up tension lever 18 moves towards its bottom dead centre.Thread take-up tension lever 18 from it the dead point leave, thereby the line between two needlework folder 14,28 is excessive, that is to say, is not subjected to tension force at this some place line, shown in Fig. 2 and 3.The twice of the distance that this excessive line is advanced to 205 ° of positions shown in Fig. 2 and 3 from the top dead-centre of thread take-up tension lever 18 no better than thread take-up tension lever hole 19.
Figure 4 and 5 illustrate 225 ° of arm axle positions.With compare with 3 position according to Fig. 2, arm axle 5 turns over 20 ° along making direction.
225 ° of positions, the first needlework folder 14 is in the clamp position.Main wire tensioning device 21 is still inoperative.The support 25 of anchoring 24 has moved into the backguy position now.The second needlework folder 28 is in the clamp position.
225 ° of positions, thread take-up tension lever hole 19 has moved down farther, and is positioned at now the upstream of its bottom dead centre.By making anchoring 24 shift-in backguy positions, the excessive needlework near needlework hole 19 in Fig. 2 and 3 are retracted by the line hole 29 towards anchoring 24 now.Needlework 9 almost are stretched between thread take-up tension lever hole 19 and the first needlework folder 14 now.
225 ° of positions, line hook 10 also turns over corresponding angle around rotation 11, namely turns over 40 ° around rotation 11.Needlework 9 are pulled down by bill 37 now.
Fig. 6 and 7 illustrates 305 ° of arm axle positions.305 ° of positions, thread take-up tension lever hole 19 is positioned near the bottom dead centre.
The first needlework folder 14 is in the unwrapping wire position.Main wire tensioning device 21 works, and therefore keeps needlework 9 tensionings.The support 25 of anchoring 24 is in the neutral position.The second needlework folder 28 is in the unwrapping wire position.Pre-wire tensioning device 32 works.305 ° of positions, needlework 9 are pulled down fartherly by line hook 10.
Shifting to the process of 305 ° of arm axle positions from 225 ° of arm axle positions, line hook 10 passes fabric 38 with free end 40 pulling downwards of needlework 9.When arm axle 5 continued rotation, thread take-up tension lever 18 retracted needlework in the fabric.At last, free end 40 is from the small amount of the outstanding corresponding line length of fabric.
Fig. 8 illustrates 0 ° of arm axle position.In this arm axle position, shank 7 has arrived its top dead-centre.This position is used in the beginning of the process of making-namely be used in the beginning of linear slit, because at this place, provides the maximum free space of pin 8 belows to be used for fabric 38.
0 ° of position, the first needlework folder 14 is in the unwrapping wire position.Main wire tensioning device 21 works.Anchoring 24 is in the neutral position.It is 28 inoperative that the second needlework press from both sides.Pre-wire tensioning device 23 works.Thread take-up tension lever 18 moves up from bottom dead centre from it.
Fig. 9 and 10 illustrates 65 ° of arm axle positions.Pin 8 moves down.Two needlework folders 14 and 28 are in the unwrapping wire position.Main wire tensioning device 21 works.Pre-wire tensioning device 32 works.Anchoring 24 is in the neutral position.
The above-mentioned angle position sequence according to Fig. 1 to 10 of arm axle 5 is chosen to be used for the operator scheme of explanation anchoring 24.
When the practical operation of anchoring 24 was in 0 ° of position according to Fig. 8 at arm axle 5, wherein, needlework 9 were staggered but have free end 40.In this position, insert two-layer fabric.Storaging state information in control module 6 " linear slit begins ".From according to the position of Fig. 8, as shown in figure 11, sewn seams in fabric 38.Only have and at this moment-namely only have when forming the first stitching, anchoring 24 operates as described above.When the stitching that forms subsequently, anchoring 24 always remains on the neutral position.When anchoring 24 activated to move into the backguy position of 225 ° of arm axle positions, the free end 40 of needlework 9 was passed fabric 38 by thread take-up tension lever 18 to the meeting pulling, thereby shortens.
When anchoring 24 had moved into the backguy position and returned for the first time from the neutral position, the status information " linear slit begins " that is stored in the control module 6 became " continuously linear slit ".When carrying out the line cutting-off process, the status information in the control module 6 becomes " linear slit begins " again.In the monitoring state information in the process of making subsequently.Anchoring 24 only just moves when status information is " linear slit begins ".
Can be limited by the position, angle of the support 25 the backguy position from the length of the outstanding free end 40 of fabric 38.Particularly when support 25 is driven by stepper motor, but the line end length that chosen in advance is different in control module 6.Support 25 is limited according to selected line end length by control module 6 in the position, angle of backguy position.Perhaps, the backguy length that forms corresponding line end length also can be set by the mechanical stop that is used for support 25.
When activating at the same time needlework folder 14,28 and making main wire tensioning device 21 inoperative afterwards 50ms, anchoring 24 is from shift-in backguy position, neutral position.According to described embodiment, when arriving 305 ° of positions, finished following return movement: namely, make needlework folder 14,28 move into the unwrapping wire position, activate main wire tensioning device 21 and make anchoring 24 move into the neutral position; But, accessible continuously for guaranteeing the sewing process, in any case they all will be finished when reaching 305 ° of positions substantially.
By the restriction of control module 6, substantially depend on lag time needlework folder 14,28 and main wire tensioning device 21 guarantee to operate the required time of reliable change in location.
Move into the backguy position from the neutral position and return at the anchoring of the whole sequence of linear slit beginning place the first stitching-during this period-carry out with the rotating speed of determining of arm axle 5, this rotating speed is less than the rated speed of arm axle 5.This rotating speed that reduces of arm axle 5 is also limited by control module 6.When forming the first stitching with the arm axle rotating speed of determining, be used for when needlework folder 14,28 activates, changing anchoring 24 the position lag time and be used for making main wire tensioning device to add up to for example steady state value of 50ms 21 inoperative lag times.Be used for activating at the same time and change the position of anchoring 24 after the wire clamp 14,28 and main wire tensioning device can be determined for 21 motionless lag times and the rotating speed that changes with the alternative of the arm axle 5 of Sewing machines 1 is irrelevant.
Claims (11)
1. Sewing machines comprises:
-needlework (9) supply;
-shank (7), it comprises the sewing needle (8) that passes fabric (38) for guiding needlework (9), wherein, sewing needle (8) can be actuated between bottom dead centre and top dead-centre along vertically moving up and down;
-be used for the stumble line hook (10) of needlework (9) of during stitching forms hook;
-be used for the thread take-up tension lever (18) that the ring of needlework (9) forms;
Activatable the first needlework that are between-online hook (10) and the thread take-up tension lever (18) in the supply side stroke route of needlework (9) press from both sides (14);
-in the supply side stroke route of needlework (9), be in the main wire tensioning device (21) of the upstream of the first needlework folders (14), wherein this main wire tensioning device (21) applies the line tension of the amount of determining to needlework (9) in the actuating state of main wire tensioning device (21);
It is characterized in that, also comprise
-in the supply side stroke route of needlework (9), be in activatable the second needlework folders (28) of the upstream of main wire tensioning device (21);
-anchoring (24), it is arranged in the stroke route of needlework (9) between thread take-up tension lever (18) and the second needlework folders (28), and this anchoring (24) can be controllably mobile between neutral position and backguy position, wherein,
--in the neutral position, needlework (9) are advanced along the First Line path between the second needlework folders (28) and the main wire tensioning device (21),
--in the backguy position, needlework (9) are advanced along the second thread path between the second needlework folders (28) and the main wire tensioning device (21), and described the second thread path is poorer than the thread path of First Line path length.
2. Sewing machines according to claim 1 is characterized in that, described anchoring is arranged in the formation route of needlework (9) between main wire tensioning device (21) and the second needlework folders (28).
3. Sewing machines according to claim 1 is characterized in that, described anchoring (24) is arranged so that the poor total of thread path that is caused by the motion between neutral position and backguy position is about 20mm.
4. Sewing machines according to claim 1 is characterized in that, described anchoring (24) comprises pivotable support (25), and wired hole (29) is set in the end of this support, and wherein this end can pivot perpendicular to the stroke route of line.
5. Sewing machines according to claim 1, it is characterized in that described anchoring (24) is controllable in order to automatically move, wherein in one of the different backguys position that can set as required, for in the different backguys position each, the poor amount of thread path is different.
6. Sewing machines according to claim 1 is characterized in that, is provided with for the electromagnetic driver that changes anchoring (24).
7. Sewing machines according to claim 1 is characterized in that, described anchoring (24) is installed on the clamping plate (27) of the second needlework folders (28).
8. the method for Sewing machines (1) the sewn seams beginning of one of using according to claim 1-7, the method comprises the steps:
-form wire loop (36) by lifting with the shank (7) of sewing needle (8), described shank (7) upwards is lifted to one-tenth between bottom dead centre and the top dead-centre journey position of going in ring from bottom dead centre, wherein, when described lifting occurs, the first needlework folders (14) and the second needlework folders (28) are opened to discharge needlework, main wire tensioning device (21) activated, and anchoring (24) is in the neutral position;
-after the one-tenth that arrives shank (7) goes in ring the journey position, controllably activate the clamp position of the first needlework folders (14) and the second needlework folders (28), and make main wire tensioning device (21) ineffective, so that needlework (9) are not tensioned;
-after activating the first needlework folders (14) and the second needlework folders (28) and making main wire tensioning device (21) ineffective, make anchoring (24) move into the backguy position from the neutral position, when being lowered, the needlework (9) between thread take-up tension lever (18) and the first needlework folders (14) shorten with convenient thread take-up tension lever (18);
-controllably activate subsequently the unwrapping wire position of the first needlework folders (14) and the second needlework folders (28), activate main wire tensioning device (21), and make anchoring (24) return the neutral position.
9. method according to claim 8 is characterized in that, when forming first ring, described anchoring (24) only activated in the beginning of each linear slit.
10. method according to claim 8, it is characterized in that, activate at the same time the first needlework folder (14) and the second needlework press from both sides (28) and make main wire tensioning device (21) ineffective after, time lag for the position that changes anchoring (24) is definite by Sewing machines (1), and irrelevant with the rotating speed of arm axle (5).
11. method according to claim 10, it is characterized in that, when activating at the same time the first needlework folders (14) and the second needlework folders (28) and making the ineffective afterwards about 50ms of main wire tensioning device (21), make anchoring (24) move into the backguy position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007039596.7 | 2007-08-22 | ||
| DE102007039596A DE102007039596A1 (en) | 2007-08-22 | 2007-08-22 | Sewing machine and method for sewing a seam beginning with such a sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101372797A CN101372797A (en) | 2009-02-25 |
| CN101372797B true CN101372797B (en) | 2013-01-02 |
Family
ID=40122460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102133267A Expired - Fee Related CN101372797B (en) | 2007-08-22 | 2008-08-22 | Sewing machine and method for sewing a beginning of a seam with such a sewing machine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2028311B1 (en) |
| JP (1) | JP5508698B2 (en) |
| KR (1) | KR101410571B1 (en) |
| CN (1) | CN101372797B (en) |
| DE (1) | DE102007039596A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5174414B2 (en) | 2007-10-05 | 2013-04-03 | Ｊｕｋｉ株式会社 | Sewing thread tension control device |
| DE102009048794A1 (en) | 2009-10-08 | 2011-04-14 | CHEE SIANG INDUSTRIAL CO., LTD., Wugu | Thread drawing device for sewing machine, has thread tension-primary control device arranged on base plate, thread tension-secondary control device arranged on base plate, and thread drawing-electromagnet provided on side of base plate |
| CN102041645B (en) * | 2009-10-21 | 2012-10-17 | 启翔针车（上海）有限公司 | Stitching-starting thread-drawing device for automatic thread-cutting sewing machine |
| IT1396822B1 (en) * | 2009-11-11 | 2012-12-14 | Chee Siang Ind Co Ltd | FILTERHIP DEVICE AGENT TO START THE SEWING PROCESS FOR A SEWING MACHINE WITH THE POSSIBILITY OF AUTOMATIC WIRE CUTTING. |
| CN102220676B (en) * | 2010-04-19 | 2012-11-14 | 启翔针车（上海）有限公司 | Sewing machine needlework supplying device |
| DE102010043906A1 (en) | 2010-11-15 | 2012-05-16 | Dürkopp Adler AG | Sewing machine and method for sewing a seam beginning with such a sewing machine |
| DE102011005198A1 (en) * | 2011-03-07 | 2012-09-13 | Dürkopp Adler AG | Sewing machine and method for sewing a seam beginning with such a sewing machine |
| DE202012011059U1 (en) | 2012-11-19 | 2014-02-20 | Dürkopp Adler AG | sewing machine |
| DE102012221060B3 (en) * | 2012-11-19 | 2014-02-06 | Dürkopp Adler AG | sewing machine |
| DE102017201240A1 (en) | 2017-01-26 | 2018-07-26 | Dürkopp Adler AG | Method for producing a seam beginning upper thread of a seam to be formed in sewing material with a defined nominal seam projection and sewing machine for carrying out such a method |
| DE102017206499B3 (en) | 2017-04-18 | 2018-05-03 | Dürkopp Adler AG | sewing machine |
| DE102022203472A1 (en) | 2022-04-07 | 2023-10-12 | Dürkopp Adler GmbH | sewing machine |
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| US4364319A (en) * | 1978-04-08 | 1982-12-21 | Durkoppwerke Gmbh | Controlled thread clamp device for needle threads |
| US5931107A (en) * | 1997-12-22 | 1999-08-03 | Mcdonnell Douglas Corporation | Advanced stitching head for making stitches in a textile article having variable thickness |
| CN1478937A (en) * | 2002-07-27 | 2004-03-03 | �Ŷ�����-�����չɷݹ�˾ | Method for leading thread free and from top of sewing material to bottom and sewing machine using the method |
| CN1600932A (en) * | 2003-09-27 | 2005-03-30 | 杜尔克普-阿德勒股份公司 | Thread tensioner for a sewing machine |
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| DE3604299A1 (en) * | 1985-04-16 | 1986-10-16 | Kochs Adler Ag, 4800 Bielefeld | METHOD FOR PULLING THE FREE THREADING END OF A NEEDLE THREAD FROM THE TOP OF A SEWING MATERIAL ON ITS BASE AND DEVICE FOR IMPLEMENTING THE METHOD |
| DE4132991C1 (en) * | 1991-10-04 | 1992-12-03 | Duerkopp Adler Ag, 4800 Bielefeld, De | Producing seam having short thread ends on bottom of workpiece - involves drawing back needle thread from underside of workpiece so that only short thread piece remains on underside |
| JPH06134162A (en) * | 1992-10-28 | 1994-05-17 | Juki Corp | Upper thread supply controller for sewing machine |
| JPH06190173A (en) * | 1992-12-24 | 1994-07-12 | Juki Corp | Device for preventing thread from falling off from needle in beginning of sewing in sewing machine |
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-
2007
- 2007-08-22 DE DE102007039596A patent/DE102007039596A1/en not_active Withdrawn
-
2008
- 2008-08-06 EP EP08014040.3A patent/EP2028311B1/en not_active Expired - Fee Related
- 2008-08-20 KR KR1020080081354A patent/KR101410571B1/en active IP Right Grant
- 2008-08-21 JP JP2008212776A patent/JP5508698B2/en active Active
- 2008-08-22 CN CN2008102133267A patent/CN101372797B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3654883A (en) * | 1970-05-14 | 1972-04-11 | Union Special Machine Co | Thread control mechanism for sewing machines |
| US4364319A (en) * | 1978-04-08 | 1982-12-21 | Durkoppwerke Gmbh | Controlled thread clamp device for needle threads |
| US5931107A (en) * | 1997-12-22 | 1999-08-03 | Mcdonnell Douglas Corporation | Advanced stitching head for making stitches in a textile article having variable thickness |
| CN1478937A (en) * | 2002-07-27 | 2004-03-03 | �Ŷ�����-�����չɷݹ�˾ | Method for leading thread free and from top of sewing material to bottom and sewing machine using the method |
| CN1600932A (en) * | 2003-09-27 | 2005-03-30 | 杜尔克普-阿德勒股份公司 | Thread tensioner for a sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2028311A3 (en) | 2011-10-19 |
| KR20090020495A (en) | 2009-02-26 |
| DE102007039596A1 (en) | 2009-02-26 |
| EP2028311A2 (en) | 2009-02-25 |
| CN101372797A (en) | 2009-02-25 |
| JP5508698B2 (en) | 2014-06-04 |
| KR101410571B1 (en) | 2014-06-23 |
| EP2028311B1 (en) | 2013-10-09 |
| JP2009045468A (en) | 2009-03-05 |
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