EP0111017B1 - Transporteur de machine à coudre - Google Patents

Transporteur de machine à coudre Download PDF

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Publication number
EP0111017B1
EP0111017B1 EP19820111298 EP82111298A EP0111017B1 EP 0111017 B1 EP0111017 B1 EP 0111017B1 EP 19820111298 EP19820111298 EP 19820111298 EP 82111298 A EP82111298 A EP 82111298A EP 0111017 B1 EP0111017 B1 EP 0111017B1
Authority
EP
European Patent Office
Prior art keywords
crank
pin
supported
flange
guide flange
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.)
Expired
Application number
EP19820111298
Other languages
German (de)
English (en)
Other versions
EP0111017A1 (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 feeding a sewing machine, according to the first part of claim 1.
  • the transfer to the sewing material can take place in different ways.
  • 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.
  • 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 articulated via a joint 9 to a freewheel 10 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 gear adjustment is accommodated 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.
  • a pair of rollers, for example arranged behind the needle, is driven by the output shaft 11 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 on the threaded pin 29, which penetrates the bearing pin 20 and the guide flange 19 and projects into a recess 35 in the crank arm 18 until it bears against an inclined surface 36 of the recess 35 supports.
  • 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 arm 18 is displaced between two side webs 38 of the guide flange 19 bar guided, with flange webs 40 being fastened by means of screws 39 on the side webs 38 and preventing the crank arm 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 9 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 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.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (3)

1. Transporteur de machine à coudre comportant un couple de cylindres, placé derrière l'aiguille, qui est entraîné, par l'intermédiaire d'un mécanisme à manivelle (2, 7, 10) qui est monté sur paliers dans une enveloppe de la machine à coudre et assure la transformation du mouvement de rotation d'un arbre d'entraînement (13) en un mouvement de va-et-vient d'un arbre entraîné (11), pour l'avance périodique de la paire de cylindres, et dont la manivelle (2) comporte un tourillon de vilebrequin (6) de rayon de manivelle réglable pour le réglage de la course d'une bielle (7) dont le mouvement produit le mouvement de basculement de l'arbre entraîné (11) le tourillon de vilebrequin (6) étant relié à la flasque de vilebrequin (18) d'un bras de manivelle (4) qui est guidée de manière à pouvoir se déplacer dans une bride de guidage (19) d'un tourillon (20) monté de manière à pouvoir tourner dans une enveloppe (25) et s'appliquant, sous la poussée d'un élément élastique (13), contre une butée (34, 37) qui peut se déplacer dans le sens axial pour modifier le rayon de manivelle et qui est constituée par un boulon de réglage (34) déplaçable traversant la bride de guidage (19) et le tourillon (20) par un alésage central et contre laquelle la flasque de vilebrequin (18) s'applique par une surface oblique (36) ménagée dans une partie en retrait (35) de la flasque, caractérisé en ce que le tourillon de vilebrequin (6) est monté sur palier dans un autre bras de manivelle (5) qui est constitué par une bride d'accouplement (48) et par une bride d'entraînement (45) reliée à la précédente par un dispositif de guidage (49, 50) de manière à être accouplée, avec possibilité de déplacement, à un arbre d'entraînement (13), la butée située dans un bras de manivelle (4) étant une bille qui peut être déplacée par le boulon de réglage (34) et qui est guidée par un corps d'appui (44) monté sur palier dans la bride de guidage (19) et faisant saillie dans la partie en retrait (35).
2. Dispositif selon la revendication 1, caractérisé en ce que le boulon de réglage (34) prend appui, du côté frontal, sur une goupille filetée (29) qui est vissé dans un alésage fileté (28) de l'enveloppe (25) ou d'une partie (26) de celle-ci et qui est reliée à une tête de réglage (30) permettant de régler de l'extérieur de l'enveloppe le rayon de manivelle du tourillon de vilebrequin (6).
3. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce qu'il comporte, dans le bras de manivelle (4), pour recevoir deux ressorts de compression (43) qui constituent l'élément élastique, des évidements (41, 42) qui sont ménagés dans la bride de guidage (19) et dans la flasque de manivelle (18), en oblique par rapport à un plan perpendiculaire à l'axe de rotation (3), de telle manière que l'une des extrémités des ressorts de compression prend appui dans la bride de guidage (19) et que l'autre extrémité prend appui dans la flasque de manivelle (18).
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 EP0111017A1 (fr) 1984-06-20
EP0111017B1 true 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)

Families Citing this family (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

Family Cites Families (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

Also Published As

Publication number Publication date
DE3275303D1 (en) 1987-03-05
EP0111017A1 (fr) 1984-06-20

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