EP0111017A1 - Transporteur de machine à coudre - Google Patents

Transporteur de machine à coudre Download PDF

Info

Publication number
EP0111017A1
EP0111017A1 EP82111298A EP82111298A EP0111017A1 EP 0111017 A1 EP0111017 A1 EP 0111017A1 EP 82111298 A EP82111298 A EP 82111298A EP 82111298 A EP82111298 A EP 82111298A EP 0111017 A1 EP0111017 A1 EP 0111017A1
Authority
EP
European Patent Office
Prior art keywords
crank
pin
flange
movement
supported
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
EP82111298A
Other languages
German (de)
English (en)
Other versions
EP0111017B1 (fr
Inventor
Paul Rohner
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
Priority to DE8282111298T priority Critical patent/DE3275303D1/de
Priority to EP19820111298 priority patent/EP0111017B1/fr
Publication of EP0111017A1 publication Critical patent/EP0111017A1/fr
Application granted granted Critical
Publication of EP0111017B1 publication Critical patent/EP0111017B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/22—Work-feeding means with means for setting length of stitch

Definitions

  • the invention relates to a device for the material feed of a :: sewing machine, which has a crank gear mounted in a housing for converting the rotary movement of an input shaft into a reciprocating movement of an output shaft, which has a crank pin adjustable in the crank radius for adjustment the stroke of a connecting rod is provided, the movement of which causes the pivoting movement of the output shaft.
  • the transfer to the sewing material can take place in different ways.
  • the so-called Roller transport in which the material to be sewn is additionally drawn off by a pair of rollers, arranged in the sewing direction, arranged behind the needle and inevitably driven by the above-mentioned gear mechanism.
  • crank pin of which is provided with an adjustable crank radius.
  • the connecting rod mounted on the crank pin transmits the double-stroke movement per revolution to the output shaft via a freewheel, so that the output shaft only moves during one stroke.
  • crank radius of the crank pin must be adjusted while the crank pin is at a standstill, the housing of the gear device being open in each case and the new setting of the crank radius having to be carried out using appropriate tools. This setting can therefore not be carried out by the person operating the sewing machine, but a trained person must be consulted.
  • crank pin is connected to a crank arm, which is guided in a guide flange of a bearing pin rotatably mounted in the housing and by the compressive force of a spring element rests against a stop that is axially displaceable to change the crank radius and that can be adjusted from outside the housing.
  • the arrow 1 represents a rotational movement of a crank 2 with an axis of rotation 3.
  • a crank pin 6 is connected, on which a connecting rod 7 is mounted.
  • the double arrow 8 represents the possibility of adjusting the radius of the crank pin 6.
  • the connecting rod 7 is connected to a freewheel 10 via a joint 9 articulated, which is mounted on an output shaft 11.
  • the double arrow 12 represents the back and forth movement of the output shaft 11, which is achieved by the described gear device during a rotary movement of the drive shaft 13 lying in the axis of rotation 3.
  • the drive shaft 13 is mounted in bearings 14, 15 fixed to the housing and the output shaft 11 in bearings 16, 17 also fixed to the housing.
  • the entire transmission device is housed in a housing, not shown, which is arranged, for example, on the arm stand of a sewing machine and is driven by the sewing machine motor via a toothed belt drive.
  • the output shaft 11 drives a pair of rollers, for example arranged behind the needle, via corresponding transmission members.
  • the connecting rod 7 with the freewheel 10 and the output shaft 11 are not connected to the present invention and are therefore not explained in detail.
  • the adjustment part shown in FIG. 2 comprises the adjustable crank arm 4, which is composed of a crank arm 18 and a guide flange 19.
  • the guide flange 19 is connected to a bearing pin 20 which is mounted in a flange bushing 23 by means of two roller bearings 21, 22, which in turn is fastened in a housing wall 25 by screws 24.
  • the screws 24 are also used to hold a cover 26 which has a threaded bore 28 for screwing in a threaded pin 29.
  • the threaded pin 29 can be actuated by a grip sleeve 30 which is connected to the threaded pin 29 by means of a bolt 31 and a screw 32.
  • a snap ring 33 limits the stroke of the threaded pin 29.
  • an adjusting bolt 34 is supported, which penetrates the bearing journal 20 and the guide flange 19 and projects into a recess 35 in the crank arm 18 until it is supported on an inclined surface 36 of the recess 35.
  • the adjusting bolt 34 projects into the recess 35 with a ball 37, however, the adjusting bolt 34 and the ball 37 could consist of one piece, the ball 37 forming the front part of the adjusting bolt 34.
  • crank web 18 is slidably guided between two side webs 38 of the guide flange 19, flange webs 40 being fastened on the side webs 38 by means of screws 39 and preventing the crank web 18 from falling out of the side webs 38.
  • the crank pin 6 is firmly connected to the crank arm 18.
  • a recess 41, 42 is arranged on each side of the recess 35. These two recesses 41, 42 are, see FIG. 4, inclined to this plane.
  • the recesses 41, 42 are therefore both in the guide flange 19 and in the crank arm 18 and receive a compression spring 43.
  • one end of the compression spring 43 is supported on the crank arm 18 and the other end on the guide flange 19.
  • the two compression springs 43 attempt to remove the crank pin 6 from the axis of rotation 3, but are prevented from doing so by the ball 37 of the adjusting bolt 34.
  • crank arms 4, 5 assume the position that corresponds to the greatest distance of the crank pin 6 from the axis of rotation 3 of the drive shaft 13.
  • the ball 37 is here the most retracted and only partially protrudes into the recess 35.
  • the threaded pin 29 is in the outermost position. So that the ball 37 can be supported in any position on the guide flange 19, a support pin 44 is supported in the guide flange 19, which protrudes into the recess 35. If the ball 37 is now pressed deeper into the recess 35 by screwing in the threaded pin 29, the crank pin 6 is moved against the axis of rotation 3 of the drive shaft 13 against the action of the springs 43.
  • crank pin 6 In the innermost position of the ball 37, the crank pin 6 is aligned with the drive shaft 13 and the bearing pin 20, so that the connecting rod 7 mounted on the crank pin 6 no longer performs any lifting movement. It is thus possible to set the stroke from zero to a maximum value, which is shown in FIGS. 3 and 4. Accordingly, the feed of the sewing material can be set from zero to a maximum feed value.
  • the crank arm 5 is composed of a drive flange 45 connected to the drive shaft 13 and a coupling flange 48 fastened on the crank pin 6 by means of a wedge 46 and a clamping screw 47.
  • the coupling of the two flanges 45, 48 takes place through a diagonal web 49 on the drive flange 45, which projects into a diagonal groove 50 of the coupling flange 48. If the threaded pin 29 is adjusted with the aid of the grip sleeve 30, the coupling flange 48 moves in the same way with respect to the drive flange 45 as the crank arm 18 with respect to the guide flange 19.
  • the position of the crank arm 18 and the coupling flange 48 remains relative the axis of rotation 3 unchanged.
  • the adjusting bolt 34 rotates with the guide flange 19 so that the end face of the adjusting bolt 34 supported on the threaded pin 29 rotates on the fixed threaded pin 29, but the wear is practically zero due to the low speed in the contact area and the relatively low pressures. Because the transition from the rotary movement to the stationary or manually operated part takes place in a range of low rotational speed in the setting part according to FIG. 2, the setting of the crank radius and thus the material feed on the sewing machine can be carried out not only when the machine is at a standstill but also during operation the sewing machine. Because of the simplicity of this adjustment option, the material feed can now also be adjusted by the seamstress herself.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP19820111298 1982-12-07 1982-12-07 Transporteur de machine à coudre Expired EP0111017B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8282111298T DE3275303D1 (en) 1982-12-07 1982-12-07 Sewing machine work feeding device
EP19820111298 EP0111017B1 (fr) 1982-12-07 1982-12-07 Transporteur de machine à coudre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19820111298 EP0111017B1 (fr) 1982-12-07 1982-12-07 Transporteur de machine à coudre

Publications (2)

Publication Number Publication Date
EP0111017A1 true EP0111017A1 (fr) 1984-06-20
EP0111017B1 EP0111017B1 (fr) 1987-01-28

Family

ID=8189379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820111298 Expired EP0111017B1 (fr) 1982-12-07 1982-12-07 Transporteur de machine à coudre

Country Status (2)

Country Link
EP (1) EP0111017B1 (fr)
DE (1) DE3275303D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0528095A1 (fr) * 1991-08-20 1993-02-24 N.V. Titan-Baratto S.A. Dispositif de réglage de la densité de point d'une surjeteuse
AT406059B (de) * 1993-12-22 2000-02-25 Naehtechnik Sahl Ges M B H Exzenter für verstellbare exzentertriebe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1685436A (en) * 1927-01-10 1928-09-25 Singer Mfg Co Feeding mechanism for sewing machines
US1736297A (en) * 1927-02-02 1929-11-19 Metropolitan Sewing Machine Co Puller-feed sewing machine
US2005656A (en) * 1931-12-19 1935-06-18 Freydberg Brothers Inc Feed reversing mechanism for sewing machines
US2730977A (en) * 1953-07-31 1956-01-17 Union Special Machine Co Feed mechanism for sewing machines
US4108094A (en) * 1977-04-29 1978-08-22 Reliable Attachment Company Ruffling attachment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1685436A (en) * 1927-01-10 1928-09-25 Singer Mfg Co Feeding mechanism for sewing machines
US1736297A (en) * 1927-02-02 1929-11-19 Metropolitan Sewing Machine Co Puller-feed sewing machine
US2005656A (en) * 1931-12-19 1935-06-18 Freydberg Brothers Inc Feed reversing mechanism for sewing machines
US2730977A (en) * 1953-07-31 1956-01-17 Union Special Machine Co Feed mechanism for sewing machines
US4108094A (en) * 1977-04-29 1978-08-22 Reliable Attachment Company Ruffling attachment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0528095A1 (fr) * 1991-08-20 1993-02-24 N.V. Titan-Baratto S.A. Dispositif de réglage de la densité de point d'une surjeteuse
AT406059B (de) * 1993-12-22 2000-02-25 Naehtechnik Sahl Ges M B H Exzenter für verstellbare exzentertriebe

Also Published As

Publication number Publication date
DE3275303D1 (en) 1987-03-05
EP0111017B1 (fr) 1987-01-28

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