CN1295149A - Method and device for controlling feeding cups for sewing machine - Google Patents
Method and device for controlling feeding cups for sewing machine Download PDFInfo
- Publication number
- CN1295149A CN1295149A CN 00134727 CN00134727A CN1295149A CN 1295149 A CN1295149 A CN 1295149A CN 00134727 CN00134727 CN 00134727 CN 00134727 A CN00134727 A CN 00134727A CN 1295149 A CN1295149 A CN 1295149A
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- China
- Prior art keywords
- work feed
- feed device
- loopback
- cloth feeding
- feeding direction
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Abstract
The present invention provided a method and device for controlling feeding cups for sewing machine. When a cloth feeding means for transferring a matter to be sewed in such a manner that the cloth feeding direction can be changed normally and reversely selectably in a stitch forming position is laid in the reverse feeding state, the reverse feed quantity of a tip pulling roller engaged with the matter to be sewed from above ahead in the cloth feeding direction over the cloth feeding means to transfer the matter to be by rotation is controlled so as to be equal to or smaller than the reverse feed quantity of the cloth feeding means or the normal feed quantity of the tip putting roller.
Description
The present invention relates to a kind of feeding cups for sewing machine control device, described push rolls be arranged on the place ahead that needle tracking forms the cloth feeding direction of position with push rolls, from the top with sewn object joins and by rotating the handover sewn object.
In the past, known a kind of like this Sewing machines was provided with work feed device and push rolls, and wherein, described work feed device forms the work feed motion and presser feet co-operating of passing through feed dog on the position at needle tracking, thereby transfers sewn object; Described push rolls is set at the place ahead that needle tracking forms the cloth feeding direction of position, is configured to join from top and sewn object, and is rotated by motor.And, while this push rolls can draw sewn object sewed fabric moving the place ahead to described cloth feeding direction with the cloth feed amount of Duoing than described work feed device.
Yet, because push rolls in the past can only rotate towards a direction in order to move sewn object towards the place ahead of cloth feeding direction, so in making when the feeding direction of described feed dog being become the backhaul direction and carries out stitching for so-called time, the mutual tractive sewn object of feed dog and push rolls, push rolls is the top scuffing of sewn object, or the loopback amount do not become the amount of defined, and needle tracking is inconsistent, thereby the quality of sewings is reduced.
Therefore, in known this structure, when this feed dog loopback, allow push rolls keep rising in the mode that does not engage with sewn object, but, must be useful on the drivers such as solenoid that carry out this rising, need spended time owing to make solenoid add elastic force up to making push rolls rise, thereby the speed of Sewing machines be slow, sewing efficiency is reduced, or before push rolls rose and leaving sewn object, feed dog began loopback, thereby described sewings quality is reduced.
In addition, in known in the past structure, make the push rolls backward rotation during feed dog loopback.
Yet, as mentioned above, when the feed dog loopback, make in the counter-rotational this structure in the past of push rolls, because the cloth feed amount that the cloth feed amount of the cloth feed amount during loopback when sending to forward equates is carried out loopback, promptly, owing to carry out loopback with cloth feed amount more than the work feed device, thereby the sewn object of loopback will produce lax between presser feet and push rolls, sewn object is sent into the presser feet below in wrinkling mode and is made as a result, thereby the problem that produces is to lose the sewings commodity value or quality is descended.
The purpose of this invention is to provide a kind of Sewing machines that can improve the above-mentioned existing defective of prior art.
For achieving the above object, the invention provides a kind of control method of feeding cups for sewing machine, the work feed device forms on the position at needle tracking and transfers sewn object can selectively cloth feeding direction being transformed to forward and reverse mode, when described work feed device is become the loopback state, push rolls the place ahead of the cloth feeding direction of work feed device from above join with sewn object and transfer sewn object by rotating, the backhaul cloth feed amount of described push rolls is controlled to be and equals or be less than described work feed device loopback amount.Maybe can be controlled to be and be less than described push rolls forward feed.
The present invention also provides a kind of feeding cups for sewing machine control device, comprises work feed device, push rolls, driver and controller, and the work feed device forms on the position at needle tracking and transfers sewn object can selectively cloth feeding direction being transformed to forward and reverse mode; Push rolls the place ahead of the cloth feeding direction of work feed device from above join with sewn object and transfer sewn object by rotating; Driver carries out rotating drive can selectively cloth feeding direction being transformed to forward and reverse mode to above-mentioned push rolls; Controller is controlled to the rotation direction counter-rotating that makes described driver according to the cloth feeding direction of described work feed device, it is characterized in that, when described controller becomes the loopback state at described work feed device, when the cloth feeding direction with described push rolls becomes loopback, described loopback cloth feed amount changed to be less than the cloth feed amount that forward is sent to.
Described controller also can be provided with converter, and this converter can carry out plural at least cloth feed amount to the cloth feed amount of push rolls to be set, and according to the cloth feeding direction of described push rolls, the cloth feed amount that sets is changed.
The present invention also provides a kind of feeding cups for sewing machine control device, comprises work feed device, push rolls, driver, and the work feed device forms on the position at needle tracking and transfers sewn object can selectively cloth feeding direction being transformed to forward and reverse mode; Push rolls the place ahead of the cloth feeding direction of work feed device from above join with sewn object and transfer sewn object by rotating; Driver rotates described push rolls or stops; It is characterized in that,, when described work feed device becomes the loopback state, become idling conditions and described driver is stopped in order to make described push rolls as the controller of the rotation direction of described driver being controlled according to the cloth feeding direction of described work feed device.
Sewing machines of the present invention when described work feed device becomes the loopback state, because push rolls becomes to be less than the state that cloth feed amount is carried out loopback when just changeing, perhaps becomes idling conditions, thereby sewn object does not have before presser feet and loosely carries out loopback.
Fig. 1 is the Sewing machines embodiment view that push rolls of the present invention is equipped with in expression.
Fig. 2 is the sewing machine control circuit of the first embodiment of the present invention.
Fig. 3 is the loopback control flow chart of the first embodiment of the present invention.
Fig. 4 is the flow chart of the impulse motor backward rotation control subprogram of the first embodiment of the present invention.
Fig. 5 is the sewing machine control circuit figure of the second embodiment of the present invention.
Fig. 6 is the loopback control flow chart of the second embodiment of the present invention.
Fig. 7 is the sewing machine control circuit figure of the third embodiment of the present invention.
Fig. 8 is the loopback control flow chart of the third embodiment of the present invention.
Fig. 9 is the flow chart of the impulse motor backward rotation control subprogram of the fourth embodiment of the present invention.
[embodiment]
Among Fig. 1, pin N can be bearing on the head of sewing machine M with moving up and down, and with Sewing machines CD-ROM drive motor (not shown) interlock.And presser feet 1 is bearing on the head of sewing machine M, usually accepts the elastic force of effect downwards, and on the sewn object W that is crimped on by this elastic force on the down position on the needle plate P.
Be arranged at the feed dog 2 and described Sewing machines CD-ROM drive motor interlock of needle plate P below, produce mechanism (not shown) by well-known work feed motion and carry out elliptic motion (work feed four connecting rods).And feed dog 2 is connected with known mechanisms such as work feed amount changing mechanism and loopback mechanisms, wherein, described work feed amount changing mechanism produces in the mechanism by making cloth feed amount restriction cam change angle act on described work feed motion, thereby the cloth feed amount of feed dog 2 is changed; Described loopback mechanism acts on the described work feed amount changing mechanism by operation loopback bar, thereby the cloth feeding direction of feed dog 2 is become the loopback direction from forward feeding direction (Fig. 1 arrow X).
The front end of supporting arm 3 stretches to the cloth feeding direction (Fig. 1 left) at head of sewing machine M rear, can be supported in the front end of supporting arm 3 at the bolster 4 that descends end bearing to send cloth feeding mechanism A to with moving up and down.This bolster 4 is accepted usually the active force of effect downwards by the stage clip 5 that is wound on the bolster 4.
Send to cloth feeding mechanism A by the supporting mass 6 that is fixed in described bolster 4 lower ends, upwards the supporting arm 7 that prolongs of this supporting mass 6 cloth feeding direction (Fig. 1 is right-hand) below here, be fixed in impulse motor 8 on the supporting mass 6, the push rolls 9 that rotates by this impulse motor and the synchronous belt 10 that couples together between this push rolls 9 and the impulse motor 8 constituted.These structures of sending cloth feeding mechanism A to also are known structures.
Below first embodiment is described.
Among Fig. 2,11 pairs of described feed dogs 2 of rotation angle sensor detect to the rotational angle range that the top of needle plate P is outstanding in once rotating with the machine spindle during carrying out work feed, and each this rotational angle range is produced work feed signal in period.Send cloth feed amount setting apparatus 12a, 12b to and respectively the positive direction cloth feed amount and the backhaul direction cloth feed amount of described push rolls are set, produce cloth feed amount data corresponding to operator's setting value.Under send detector 13 and described work feed amount changing mechanism or work feed motion generating mechanism to be provided with explicitly, when detecting the cloth feed amount of described feed dog 2, produce following feed signals corresponding to this cloth feed amount.Feeding direction detector 14 is provided with explicitly with described feed motion generating mechanism or loopback mechanism, produces the signal corresponding to this state when the cloth feeding direction that detects described feed dog 2 is positive direction or backhaul direction respectively.
ROM15 stores the control program of each assembly of this Sewing machines.RAM16 stores the described setting value of cloth feed amount setting apparatus 12a, 12b or the status signal of described cloth feeding direction detector 14 etc. sent to.CPU17 controls each device according to described control program.
Sewing machines CD-ROM drive motor 18 drives or stops Sewing machines.Motor driver 19 makes the driving of Sewing machines CD-ROM drive motor or stops.Impulse motor driver 20 makes described impulse motor 8 drive or stop towards positive direction or backhaul direction, and under the control of CPU17 with produce described work feed signal Synchronization in period, rotating drive impulse motor 8.Pedal sensor 21 is provided with explicitly with pedal (not shown), so that produce initiating signal by preceding stepping on operation, and by stepping on the generation stop signal before discharging.
Control by the flow chart paired pulses motor 8 of Fig. 3 describes.
By sending cloth feed amount setting apparatus 12a, 12b to the setting value of push rolls 9 caused forwards, reverse feed is read in (S-1) among the RAM15.Pedal sensor 21 1 detects when stepping on before the pedal (S-2), just makes CD-ROM drive motor 18 become driving condition (S-3) by motor driver 19.
Usually, when this starts, feed dog is in forward work feed state (S-4), produce the signal that forward is sent state to by cloth feeding direction detector 14, when producing described work feed signal in period, by setting the forward feed, by motor driver 20 driving pulse motors 8 (S-5) by sending cloth feed amount setting apparatus 12a to.The cloth feed amount of the impulse motor 8 when usually, this forward being sent to is set for more than the cloth feed amount of feed dog 2.
When pedal sensor 21 detects pedal release (S-6), Sewing machines CD-ROM drive motor 18 just stops (S-7), and then impulse motor 8 also stops (S-8).
In described forward was sent to, by operating back the suture needle bar, feed dog 2 just became the state of loopback, when cloth feeding direction detector 14 produces the status signal of loopback (S-4), handled (S-9) with regard to the subprogram of paired pulses motor backward rotation control.
In the subprogram (Fig. 4) of this impulse motor backward rotation control, at first set for by the described cloth feed amount of sending to and set the loopback amount (S-91) that detector 12b has set, when each sensor 11 by described rotation produces regularly the work feed signal in period of (timing) work feed (S-92), the rotation direction of driver 20 paired pulses motors 8 is carried out backward rotation and is driven, and makes it to become this setting value (S-93).The loopback amount of this impulse motor 8 is lacked by the cloth feed amount that the operator sets for when sending to than the forward of impulse motor 8 usually, for example equates with the loopback amount of feed dog, perhaps also lacks than it.
Below with reference to Fig. 5, Fig. 6 second embodiment is described.
The control circuit of Fig. 5 is compared with first embodiment (Fig. 2), except do not have the backhaul direction send cloth feed amount setting apparatus 12a to, down the cloth feed amount detector 13, other structure is all identical.
As shown in Figure 6, preceding when stepping on plate (S-21), just drive Sewing machines CD-ROM drive motor 18 (S-2).So feed dog 2 is under the forward condition, impulse motor 8 rotates push rolls 9, to become by sending the forward cloth feed amount that cloth feed amount setting apparatus 12a sets to.
Step S-25～step S-27 is identical with first embodiment to be controlled.
When detecting the loopback state (S-23), impulse motor driver 20 is with regard to so that the mode that impulse motor 8 stops to be controlled (S-29).
Thus, push rolls 9 becomes the state of idle running, thereby loses the effect that sewn object W is transferred, and sewn object W only carries out work feed by the loopback action of feed dog 2.
Below with reference to Fig. 7, Fig. 8 the 3rd embodiment is described.
Among Fig. 7, be provided with loopback instruction device 22, solenoid drive circuit 23, loopback solenoid 24, compare with first embodiment (Fig. 2), except not having cloth feeding direction detector 14, other structure is all identical.
As shown in Figure 8, step S-31～S-33, the control of step S-35～S-38 is identical with first embodiment's (Fig. 3).
Operate described loopback instruction device 22 and when producing the loopback instruction (S-34), 23 pairs of loopback solenoids 24 of solenoid drive circuit add elastic force, feed dog 2 just becomes the state of loopback.This loopback amount is set by predetermined mechanism.
Therefore, the subprogram of paired pulses motor backward rotation control is handled (S-40), by with the identical control of described first embodiment (Fig. 4), rotate the control impuls motor by the backhaul direction, push rolls 9 with feed dog 2 about equally or be less than its loopback amount and carry out loopback.
Below the 4th embodiment is described.
In the 4th embodiment, the structure of circuit is identical with Fig. 5.That is, the cloth feed amount setting apparatus 12b that sends to that does not want among first, second embodiment reaches cloth feed amount detector 13 down.
By shown in Figure 9, the impulse motor backhaul direction among Fig. 3 and Fig. 8 rotated subprogram (Fig. 4) change.
Promptly, become the N% of forward feed (to be 100% of forward feed in the present embodiment loopback amount computing of push rolls 9, promptly equate) (S-94), and set the value (S-95) of its operation result for, when producing work feed signal in period (S-96), impulse motor driver 20 makes impulse motor 8 rotate (S-97) by the backhaul direction.
In addition, to the setting value of the N% in the described computing, the operator can be 100% with the interior change setting that carries out.Thus, push rolls 9 just can carry out loopback according to finer setting.And, also can carry out computing to the ratio of the loopback amount of feed dog 2.
In addition, in each embodiment, for the loopback amount of push rolls 9, though put down in writing the example that equates or be less than it with the loopback amount of feed dog 2,, as long as be less than the forward feed of push rolls 9.
In addition, in each embodiment, although understand impulse motor 8 is controlled to the situation of rotating when making 9 work feeds in machine spindle once rotates of push rolls constantly, still, in order to make the Sewing machines high speed, also can in the whole moment in the once rotation of machine spindle, rotate.At this moment, this control has not just needed each sensor 1 of rotating.
According to the present invention, because the cloth feed amount the when cloth feed amount during the push rolls loopback is sent to be less than the push rolls forward or carry out loopback to be less than or to equal feed dog loopback amount, thereby between presser feet and push rolls, can not produced lax by the sewn object of loopback, and can not send into the presser feet below wrinklingly and make, thereby the existing in the past problem that can solve the commodity value that loses sewings or quality is reduced.
Claims (5)
1. the control method of a feeding cups for sewing machine, it is characterized in that, the work feed device forms on the position at needle tracking and transfers sewn object can selectively cloth feeding direction being transformed to forward and reverse mode, when described work feed device is become the loopback state, push rolls the place ahead of the cloth feeding direction of work feed device from above join with sewn object and transfer sewn object by rotating, the loopback amount of described push rolls is controlled to be the loopback amount that equals or be less than described work feed device.
2. the control method of a feeding cups for sewing machine, it is characterized in that, the work feed device forms on the position at needle tracking and transfers sewn object can selectively cloth feeding direction being transformed to forward and reverse mode, when described work feed device is become the loopback state, push rolls the place ahead of the cloth feeding direction of work feed device from above join with sewn object and transfer sewn object by rotating, the loopback amount of described push rolls is controlled to be the forward feed that is less than described push rolls.
3. feeding cups for sewing machine control device comprises:
The work feed device is transferred sewn object can selectively cloth feeding direction being transformed to forward and reverse mode on needle tracking formation position;
Push rolls, the place ahead of the cloth feeding direction of work feed device from above join with sewn object and transfer sewn object by rotating;
Driver carries out rotating drive can selectively cloth feeding direction being transformed to forward and reverse mode to above-mentioned push rolls; And
Controller is controlled to the rotation direction counter-rotating that makes described driver according to the cloth feeding direction of described work feed device,
It is characterized in that, when described controller becomes the loopback state at described work feed device, make described push rolls loopback with the loopback amount of the forward feed that is less than described push rolls.
4. feeding cups for sewing machine control device comprises:
The work feed device is transferred sewn object can selectively cloth feeding direction being transformed to forward and reverse mode on needle tracking formation position;
Push rolls, the place ahead of the cloth feeding direction of work feed device from above join with sewn object and transfer sewn object by rotating;
Driver carries out rotating drive can selectively cloth feeding direction being transformed to forward and reverse mode to above-mentioned push rolls; And
Controller is controlled to the rotation direction counter-rotating that makes described driver according to the cloth feeding direction of described work feed device,
It is characterized in that, when described controller becomes the loopback state at described work feed device, when the cloth feeding direction with described push rolls becomes the loopback direction, the loopback quantitative change of described push rolls more is equal to or less than work feed device loopback amount.
5. feeding cups for sewing machine control device comprises:
The work feed device is transferred sewn object can selectively cloth feeding direction being transformed to forward and reverse mode on needle tracking formation position;
Push rolls, the place ahead of the cloth feeding direction of work feed device from above join with sewn object and transfer sewn object by rotating; And
Driver rotates described push rolls or stops;
It is characterized in that,, when described work feed device becomes the loopback state, become idling conditions, described driver is stopped in order to make described push rolls as the controller of controlling the rotation of described driver according to the cloth feeding direction of described work feed device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30429799A JP2001120870A (en) | 1999-10-26 | 1999-10-26 | Method for controlling tip pulling roller of sewing machine and device therefor |
| JP304297/1999 | 1999-10-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1295149A true CN1295149A (en) | 2001-05-16 |
| CN1204312C CN1204312C (en) | 2005-06-01 |
Family
ID=17931348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00134727 Expired - Fee Related CN1204312C (en) | 1999-10-26 | 2000-10-26 | Method and device for controlling feeding cups for sewing machine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2001120870A (en) |
| CN (1) | CN1204312C (en) |
| CZ (1) | CZ20003959A3 (en) |
| TW (1) | TW526302B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624760B (en) * | 2008-07-09 | 2013-07-17 | 余晋 | Material grabbing mechanism for portable bag closer |
| CN109554839A (en) * | 2017-09-25 | 2019-04-02 | Juki株式会社 | Sewing machine |
| CN113005646A (en) * | 2021-03-05 | 2021-06-22 | 苏州琼派瑞特电子科技有限公司 | Feeding mop mechanism for overedger |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106222893B (en) * | 2016-08-31 | 2022-04-15 | 苏州市志诚机械有限公司 | A pinch roller subassembly and sewing machine for sewing machine |
-
1999
- 1999-10-26 JP JP30429799A patent/JP2001120870A/en active Pending
-
2000
- 2000-10-25 CZ CZ20003959A patent/CZ20003959A3/en unknown
- 2000-10-25 TW TW89122476A patent/TW526302B/en not_active IP Right Cessation
- 2000-10-26 CN CN 00134727 patent/CN1204312C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624760B (en) * | 2008-07-09 | 2013-07-17 | 余晋 | Material grabbing mechanism for portable bag closer |
| CN109554839A (en) * | 2017-09-25 | 2019-04-02 | Juki株式会社 | Sewing machine |
| CN109554839B (en) * | 2017-09-25 | 2022-03-08 | Juki株式会社 | Sewing machine |
| CN113005646A (en) * | 2021-03-05 | 2021-06-22 | 苏州琼派瑞特电子科技有限公司 | Feeding mop mechanism for overedger |
Also Published As
| Publication number | Publication date |
|---|---|
| TW526302B (en) | 2003-04-01 |
| CZ20003959A3 (en) | 2002-02-13 |
| JP2001120870A (en) | 2001-05-08 |
| CN1204312C (en) | 2005-06-01 |
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Granted publication date: 20050601 Termination date: 20091126 |