EP0929709A1 - Dispositif d'entrainement pour faire avancer un article a coudre sur une machine a coudre - Google Patents

Dispositif d'entrainement pour faire avancer un article a coudre sur une machine a coudre

Info

Publication number
EP0929709A1
EP0929709A1 EP97942697A EP97942697A EP0929709A1 EP 0929709 A1 EP0929709 A1 EP 0929709A1 EP 97942697 A EP97942697 A EP 97942697A EP 97942697 A EP97942697 A EP 97942697A EP 0929709 A1 EP0929709 A1 EP 0929709A1
Authority
EP
European Patent Office
Prior art keywords
drive
belt
roller
conveyor
driven wheel
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
Application number
EP97942697A
Other languages
German (de)
English (en)
Other versions
EP0929709B1 (fr
Inventor
Johannes Sahl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0929709A1 publication Critical patent/EP0929709A1/fr
Application granted granted Critical
Publication of EP0929709B1 publication Critical patent/EP0929709B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/10—Work-feeding means with rotary circular feed members
    • D05B27/14—Work-feeding means with rotary circular feed members rotating discontinuously

Definitions

  • the invention relates to a drive device for the material feed of a sewing machine, with a conveyor that can be coupled to a continuous rotary drive via at least one intermediate drive.
  • feed devices for a gradual workpiece feed so that the sewing material stands still during the insertion of the needle and the feed movement takes place only in the time range in which the needle is outside the sewing material.
  • These known feed devices usually consist of a hopper feeder, in which the sewing material is gripped by a toothed feeder which periodically emerges from the throat plate and is advanced in the sewing direction.
  • the feed dog movement consists of a lifting and a sliding movement, which are carried out by two independent eccentric drives working as intermediate drives.
  • hop transports therefore require a high level of design effort with complicated mechanical drive and transmission elements, which also entails a corresponding need for maintenance and a high susceptibility to malfunction.
  • an additional material feed device which comprises a belt driven via deflection rollers in the feed direction, the belt, which is continuously driven by means of a rotary drive, drives a pressure device pressed onto the fabric layer in the feed direction behind the needle and via one Roller of the pressing device and a tensioning roller which is attached to a spring-loaded lever in the tension section of the belt and which loosens the tension of the belt as predetermined by the spring-loaded lever to such an extent that its propulsion can come to a standstill, as a result of which an intermittent operation is possible, but this feed device serves only as an additional device for conventional sewing material feed devices and is intended to effect displacement of the sewing material.
  • the belt of the additional device only drives the pressure roller intermittently and thus in accordance with the step-by-step feed of material, but it cannot replace the feed of material, but can only support it subsequently.
  • the invention is therefore based on the object of providing a drive device of the type described at the outset which, in a relatively simple and low-effort manner, allows intermittent material feed to be carried out as a pure sliding movement without a lifting component and also derives this sliding movement from a continuous rotary movement.
  • the intermediate drive consists of a belt drive with a belt rotating around a drive wheel and a driven wheel, the belt having an excess length being guided in the area of the working strand via a control roller and in the area of the empty strand via a tensioning roller and the
  • the control roller and the tensioning roller are mounted periodically to and fro in the sense of releasing or deflecting the belt for decelerating, stopping and accelerating the rotation of the driven wheel, and that the drive wheel is in rotary connection with a conveyor designed as a circulating conveyor, in particular a conveyor belt.
  • the belt drive which is preferably designed as a toothed belt drive, but could also be designed as a V-belt, flat belt, rope or chain drive or the like
  • Tensioning roller sets the driven wheel in rotation in a certain transmission ratio via the drive wheel and can pass on its rotary movement to the conveying devices to be driven via corresponding drive connections.
  • the control roller is displaced from a basic position in which the belt between the drive and driven wheels experiences a deflection due to the excess length of the belt, so that there is a reduction in the deflection, the pulling drive movement of the belt becomes equal due to the constant rotation of the drive wheel the release of the belt caught and thereby delayed the rotation of the driven wheel and even stopped with a correspondingly adjusted transverse adjustment of the control roller.
  • the tension pulley on the empty run side ensures constant belt tension by increasing the deflection of the belt and guarantees perfect belt guidance.
  • a periodic back and forth movement of the control roller and the tensioning roller and the associated increasing or decreasing deflection of the belt in the area of the work strand and also the empty strand thus influences the rotational movement of the driven wheel in the sense of decelerating and stopping or when adjusting it in the sense of accelerating and the circulating conveyor coupled with this driven wheel as the transporter also makes this rotary movement or conveying movement and is also periodically decelerated or stopped or accelerated, which allows an intermittent feed to occur in a simple manner.
  • a feed wheel or a feed roller or the like rotating element could be used as the circulating conveyor, but the best feed conditions result from a conveyor belt, since the conveyor belt can be formed by suitable deflection rollers to form certain straight-line conveyor sections which ensure an exact linear feed.
  • the conveyor speeds can now be selected independently of any lifting accelerations of the sewing material or workpiece, the frequency of the feed steps and the respective step lengths depending on the frequency of the control roller transverse adjustment and the speed of rotation of the belt drive depend, so that there is maximum freedom with regard to the control of the conveyor movement. Due to the missing lifting component in the feed step, such a drive device is ideally suited for the simultaneous drive of two paired transporters that guide the workpiece exactly between them and ensure optimal feed conditions even for two or more workpieces one above the other.
  • control roller could sit on a slide or the like guided in a displaceable manner, but expediently the control roller is mounted on a control lever which can be pivoted about a pivot axis parallel to the drive wheel axis, so that the transverse adjustment can be achieved as a pivoting movement which also varies without problems by changing the lever ratios can be.
  • control lever is mounted so as to be pivotable about a swivel axis coaxial with the drive wheel axis and, in addition to the control roller, also receives the preferably resiliently supported tensioning roller.
  • control pulley and tension pulley move on concentric circular arcs around the drive wheel axis, so that the deflection and release movements of the control pulley and tension pulley are the same and perfect belt guidance is possible. Differences occurring in the length range of the working or empty run can be absorbed by a resilient support of the tension pulley without stressing the belt elasticity.
  • a differential conveyor consisting of two conveyor belts is provided as the conveyor, the two conveyor belts being in drive connection with one another via a belt drive, the excessively long belt of which in the area of the work and empty dreams is in turn via a periodically transverse control roller or a Tension roller runs.
  • the two conveyor belts of the differential feed device are arranged in the feed direction in front of and behind the needle or the processing point and allow the workpiece to be fed on both sides of the processing.
  • the speed of the two conveyor belts can be relative change to each other so that the material can either be pushed together during the sewing and crimped or pulled apart and stretched.
  • the drive connection of the two conveyor belts by means of a belt drive which can be influenced by means of a control roller or tensioning roller now provides a simple possibility of influencing the conveyor speeds of the two conveyor belts in the desired sense and, for example, of tensioning the sewing material also during the stitch, in order to apply the sewing by thread tying Compensate thread tension and achieve optimal sewing quality.
  • the differential feed dog is designed with two conveyor belts to ensure perfect feed distances and the best guiding conditions for sewing.
  • the conveyor belts can also be arranged in pairs one above the other u. the like
  • control roller or tensioning roller forms an eccentric with an eccentric shaft that can be rotated and driven about an axis of rotation parallel to the belt drive axles, and the tensioning roller is seated on a spring-loaded swivel arm, so that a speed that is matched to the number of stitches of the eccentric brings about a corresponding deflection of the working strand and thus ensures the desired effect of the differential feed device, the spring-loaded swivel arm continuously pressing on the empty strand of the belt and ensuring the required belt tension.
  • FIGS. 3 to 6 the drive device according to the invention in a functional diagram with four functional positions.
  • a merely indicated sewing machine 1 has a crank mechanism 3, which can be driven via an upper drive shaft 2, for the needle bar 4 and the needle 5 inserted into the needle bar at the lower end.
  • a Transporter 7 of a feed device 8 is arranged for an intermittent material feed.
  • the drive for the feed device 8 is derived from a rotary drive 9 comprising an electric motor, which is coupled to the transporter 7 via a belt drive 10 as an intermediate drive.
  • the belt drive 10 consists of a drive wheel 11 driven by the rotary drive 9, a driven wheel 12 assigned to it and an excessively long belt 13, the working section 131 of the belt 13 being guided via a control roller 14 and the empty section 132 via a tensioning roller 15.
  • Control roller 14 and tension roller 15 are mounted on a control lever 16 which can be swiveled coaxially to the axis A of the drive wheel 11 and are periodically adjustable back and forth by means of the control lever 16 transversely to the belt circumferential direction.
  • an actuating lever 17 of an eccentric drive 18 seated on the upper drive shaft 2 acts on the control lever 16.
  • the driven gear 12 is in turn connected to the transporter 7 via a rotary connection 19 comprising a belt drive 191 and a connecting shaft 192, so that the rotary movement of the driven gear 12 is transmitted proportionally to the transporter 7 in a corresponding transmission ratio.
  • the conveyor 7 is designed as a differential conveyor and comprises two conveyor belts 20, 21 arranged in series, which in turn are in drive connection with one another via a belt drive 22, this belt drive 22 influencing the relative speeds of the two conveyor belts 20, 21 similarly to the belt drive 10 has an excessively long belt 23 which interacts with a control roller 24 in the region of the working strand 231 and with a tension roller 25 in the region of the empty strand 232.
  • the control roller 24 here forms an eccentric, which is rotatably and drivably seated on a lower eccentric shaft 26, which in turn is drive-connected to the upper drive shaft 2 via a belt drive 27.
  • the tensioning roller 25 is mounted on a spring-loaded swivel arm 28 and, due to the spring loading, ensures that the belt 23 is continuously tensioned regardless of the position of the control roller 24.
  • the belt drive 10 makes it possible to superimpose an additional belt movement on the continuous rotary movement of the drive wheel 11 through the interaction of the control and tension pulley 14, 15 with the correspondingly long belt 13, so that the belt movement driving the driven wheel 12 delays, stops and accelerates the output gear movement results.
  • control roller 14 is transversely adjusted by pivoting the control lever 16 in the sense of releasing the belt 13 and the belt tension is maintained via the tensioning roller 15, there is an interruption of the rotational movement of the driven wheel 12 during this releasing and when it is moved back in the sense of a new one Deflection of the belt 13 to an accelerated rotary movement, whereby an intermittent drive movement is transmitted from the driven wheel 12 via the rotary connection 19 to the transporter 7.
  • This intermittent drive movement is taken over by the conveyor belts 20, 21 of the conveyor 7, so that the desired step-by-step feeding of the material takes place during the sewing process.
  • An additional deceleration or acceleration component can be superimposed on the proportional drive connection by means of the drive connection of the two conveyor belts 20, 21 by means of the belt drive 22, which can also be influenced in its transmission effect with the control roller 24 and the tensioning roller 25, whereby the two Conveyor belts 20, 21 periodically rotate differently and, in the sense of a differential feeder, lead to tensioning or possibly pushing together of the sewing material, depending on whether a smooth or crimped seam is desired.
  • the needle bar 4 is at top dead center and the belt drive 10 is in a central position with the same belt deflection in the working and empty strand area.
  • the two conveyor belts 20, 21 are connected in the same direction via the belt drive 22, since the control roller 24 is lifted off the working strand 231.
  • a lowering of the needle bar 4 and at the same time a pivoting of the control lever 16 in the sense of an increased belt deflection of the belt drive 10 in the region of the working span 231, which leads to an accelerated rotary movement of the driven wheel 12 and thus the feed movement by the conveyor belts 20, 21.
  • the conveyor belts 20, 21 still run synchronously.
  • the needle bar 4 lifts again and pulls the needle 5 out of the material to be sewn, at the same time, due to the pivoting back of the control lever 16, an increased deflection of the belt 13 in the belt drive 10 and thus an acceleration of the driven wheel 12 and thus the Feed occurs while the belt drive 22 also ensures a synchronous drive movement for the two conveyor belts 20, 21 by lifting the control roller 24, as indicated in FIG. 6. With a further drive movement there is again a downward stroke of the needle according to FIG. 3 etc.
  • the feed device 8 according to the invention is distinguished by its particularly simple and intermittent drive which can be controlled within wide ranges, which brings about a linear conveying movement for the sewing material and which offers the prerequisites for perfect sewing material guidance practically independent of the number of stitches and the stitch width.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
EP97942697A 1996-10-04 1997-10-06 Dispositif d'entrainement pour faire avancer un article a coudre sur une machine a coudre Expired - Lifetime EP0929709B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0176096A AT404603B (de) 1996-10-04 1996-10-04 Antriebsvorrichtung für eine intermittierende förderbewegung
AT176096 1996-10-04
PCT/AT1997/000213 WO1998015678A1 (fr) 1996-10-04 1997-10-06 Dispositif d'entrainement pour faire avancer un article a coudre sur une machine a coudre

Publications (2)

Publication Number Publication Date
EP0929709A1 true EP0929709A1 (fr) 1999-07-21
EP0929709B1 EP0929709B1 (fr) 2001-02-21

Family

ID=3520415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97942697A Expired - Lifetime EP0929709B1 (fr) 1996-10-04 1997-10-06 Dispositif d'entrainement pour faire avancer un article a coudre sur une machine a coudre

Country Status (8)

Country Link
US (1) US6095070A (fr)
EP (1) EP0929709B1 (fr)
JP (1) JP2001501519A (fr)
KR (1) KR20000048795A (fr)
CN (1) CN1058308C (fr)
AT (2) AT404603B (fr)
DE (1) DE59703019D1 (fr)
WO (1) WO1998015678A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT413289B (de) * 2003-11-25 2006-01-15 Sahl Johannes Nähmaschine
CN102337644B (zh) * 2011-08-03 2013-04-10 苏州日和缝制设备有限公司 缝纫机送料驱动装置
CN102337646B (zh) * 2011-08-03 2013-10-23 苏州日和缝制设备有限公司 缝纫机上双向超越离合器的控制机构
TWI468568B (zh) * 2013-08-23 2015-01-11 Chee Siang Ind Co Ltd The conveyor of the sewing machine
JP6557026B2 (ja) * 2015-02-26 2019-08-07 蛇の目ミシン工業株式会社 ミシン
CN109238583B (zh) * 2018-07-12 2020-09-25 余柳婵 一种压力开关气密性智能检测机器人工作站
JP2022071261A (ja) * 2020-10-28 2022-05-16 株式会社ジャノメ ミシン
CN115045050A (zh) * 2022-07-12 2022-09-13 广东智能体科技有限公司 一种服装生产用的埋夹机器人

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2678010A (en) * 1951-03-28 1954-05-11 Singer Mfg Co Feeding mechanism for sewing machines
DE2848123C2 (de) * 1978-11-06 1983-10-06 Duerkoppwerke Gmbh, 4800 Bielefeld Nähmaschine mit einem oberen und einem unteren Transportband
US4413582A (en) * 1979-09-19 1983-11-08 Kochs Adler Ag Workpiece feeding device for a sewing machine
US4457243A (en) * 1982-02-04 1984-07-03 The Charles Stark Draper Laboratory, Inc. Automated seam joining apparatus
DE3447751A1 (de) * 1984-12-21 1986-07-03 Manfred 8024 Oberhaching Kropf Stoffvorschub-zusatzvorrichtung
JPH0710312B2 (ja) * 1986-11-15 1995-02-08 ブラザー工業株式会社 ミシンの布送り制御装置
DE9011178U1 (de) * 1990-07-30 1990-10-04 Dürkopp Adler AG, 4800 Bielefeld Einnadel- oder Mehrnadel-Nähmaschine mit einer Nähgut-Transportvorrichtung
JPH0780174A (ja) * 1993-09-10 1995-03-28 Singer Nikko Kk マスクの縫製装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9815678A1 *

Also Published As

Publication number Publication date
ATA176096A (de) 1998-05-15
CN1058308C (zh) 2000-11-08
US6095070A (en) 2000-08-01
DE59703019D1 (de) 2001-03-29
EP0929709B1 (fr) 2001-02-21
AT404603B (de) 1999-01-25
JP2001501519A (ja) 2001-02-06
WO1998015678A1 (fr) 1998-04-16
KR20000048795A (ko) 2000-07-25
CN1232514A (zh) 1999-10-20
ATE199268T1 (de) 2001-03-15

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