EP0378965B1 - Dispositif presse-étoffe pour machine à coudre - Google Patents

Dispositif presse-étoffe pour machine à coudre Download PDF

Info

Publication number
EP0378965B1
EP0378965B1 EP89810850A EP89810850A EP0378965B1 EP 0378965 B1 EP0378965 B1 EP 0378965B1 EP 89810850 A EP89810850 A EP 89810850A EP 89810850 A EP89810850 A EP 89810850A EP 0378965 B1 EP0378965 B1 EP 0378965B1
Authority
EP
European Patent Office
Prior art keywords
lever
jack
ramp
sole plate
carriage
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 - Lifetime
Application number
EP89810850A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0378965A1 (fr
Inventor
Antonio Jimenez
Michel Combepine
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.)
Mefina SA
Original Assignee
Mefina SA
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 Mefina SA filed Critical Mefina SA
Publication of EP0378965A1 publication Critical patent/EP0378965A1/fr
Application granted granted Critical
Publication of EP0378965B1 publication Critical patent/EP0378965B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B29/00—Pressers; Presser feet
    • D05B29/02—Presser-control devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines

Definitions

  • the present invention relates to presser devices for sewing & machine, comprising, on the one hand, a rocking lever, one end of which carries a presser foot and, on the other hand, a control mechanism for driving this lever.
  • a first limit angular position in which the foot is applied to the material to be sewn
  • a second limit angular position in which this foot is distant from said material
  • said mechanism comprising at least one guide ramp and at least one rolling member capable of moving in contact with said ramp, the second end of said lever being kinematically integral with said rolling member.
  • the presser foot is, on the contrary, driven and maintained in the position applied to the material to be sewn as long as the needle bar occupies an axial position in which the needle is distant from the material: the presser foot then exerts pressure on the material to be sewn. sufficient to press it on the feed dogs of this material and thus ensure the axial displacement of the latter between two successive dives of the sewing needle.
  • the sewing machine including this type of presser device is particularly well suited to sewing decorative patterns of relatively large size, both in length and in width.
  • the invention aims to produce a fabric press device having a basic structure encompassing characteristics similar to those of the device which is the subject of US patent 4,480,566 in a combination allowing its use in a sewing machine of traditional architecture such that the stuffing press remains constantly supported on the material sewing, that is to say whatever the axial position occupied by the needle bar, whether or not the needle is stitched in the fabric.
  • the stuffing device is characterized, from that described by this American patent, by the fact that the control mechanism further comprises at least one jack, exerting a thrust on said tensioning rolling member keeping this member in contact with said ramp, and means making it possible to move the point of application of the jack on the rolling member of a first portion of this member on a second portion thereof and vice versa, said portions of the rolling member being located, for the first, between the zone of mutual contact between this member and the ramp, said lever then occupying said first limit tilting position, and, for the second, opposite from said first end of the lever with respect to said zone of mutual contact, the position occupied by said lever corresponding to said second angular limit position thereof.
  • the new proposed structure allows, on the one hand, the realization of a control mechanism for the lifting of the stuffing cloth Likely to be actuated easily, on request of the user, for example by a simple stepping motor controlled by a microprocessor, in the case of a computerized sewing machine, on the other hand, an automatic lifting of the stuffing press to the desired height when sewing materials of various thicknesses or having local extra thicknesses, even important, without these extra thicknesses causing a blockage of the material preventing its axial drive between two successive dives of the sewing needle for example.
  • l is the base of the housing of a machine to be sewn on which stands a column 2 carrying two arms 3 and 4 of which the first, 3, contains in particular a loop sensor and its control mechanism as well as a device for driving the material to be sewn, all not visible, and whose second arm, 4, carries a mechanism, not shown, for controlling the sliding, alternately in two opposite directions, of a needle bar 5, as well as a device 6 for driving this bar 5 in its throwing movement and a stuffing device 7 whose features will be described below.
  • the central motor of the sewing machine on which depend in particular the drive of the loop sensor, that of the material to be sewn and that of the bidirectional vertical movement of the needle bar, is arranged in column 2, alongside d 'a step-down transformer and a retressor assembly, all not visible in the drawing, for the current supply of the motor as well as an electronic circuit, not shown, grouping in the form of "solid state” chips, memories storage of programmed information for controlling the various functions of the sewing machine, and one or more microprocessors on which this control depends. All of these means, their coupling and functions are well known to those skilled in the art and will not be described here.
  • the sewing machine shown On the housing, and more particularly on its right front face in the drawing, the sewing machine shown carries a control keyboard of which only a switch 8, for actuating the stuffing device 7, has been shown in FIG. 1.
  • the device 6 is of the type described in document EP A1 0377404 to which reference will be made for the structural details.
  • a stepping motor 9 with a vertical axis, for controlling the tilting of a lever 10, articulated at 11 on a fixed support 12 and having a frustoconical opening forming a seat for the external face, with a spherical profile, of a bearing 13, placed in line with a second bearing 14, of structure identical to that of the bearing 13 and engaged in a corresponding seat formed in the upper flange 9a of the motor 9.
  • the bearings 13 and 14 are held in their respective seats by a spring 15, stretched between these bearings and crossed, like the bearings themselves, by the needle bar 5, the latter being moreover mounted to slide in these bearings.
  • a lamp 16 Under the support 12 is fixed a lamp 16 ensuring the lighting of the sewing area of the arm 3 through a window 4a formed in the wall of the arm 4.
  • a second window 4b of oblong shape, ensures the passage of the needle bar 5 and allows its throwing movements.
  • the presser device 7 comprises (fig. 1) a lever 70 at the right end of which is articulated, by an axis 70a, a presser foot 71 located below the needle bar 5 and that the lever 70 is intended to drive either in a low position, shown in solid lines, in which the foot presses the material to be sewn onto a needle plate 3a which has the upper face of the arm 3 of the machine (fig. 3) and more precisely on the claw , not shown, for driving the sewing material, from right to left in the drawing or vice-versa, either in a high position, shown in phantom, which is vertical to that occupied by the foot 71, in the low position .
  • the material to be sewn can be moved freely by hand, in particular to position the part to receive the seam under the needle 5a carried by the needle bar 5.
  • the stuffing device according to the invention allows the execution of seams in a very thick fabric, even becoming suddenly irregular, without blocking of this fabric by the foot 71.
  • the lever 70 can easily switch in one or the other of two directions F1 and F2 even when the foot 71 is applied to the fabric to be sewn, which explains the ease with which the machine sewing machine shown can sew stacks of fabric even of substantial thickness.
  • the lever 70 carries, on its left part (fig. 1), a flat and rectangular sole, 70b, projecting on each side of the lever and having, along its two longitudinal edges, two toothed sectors 70c and 70d each resting on a straight track specific to each sector, 72a, respectively 72b (figs 1 and 2) with toothed profile, cut on the upper face of a console 72 secured to the frame, partially shown of the sewing machine.
  • the pitch and the shape of the toothing of the toothed sectors 70c and 70d and those of the rolling tracks 72a and 72b are identical, the toothing of the former perfectly meshing with that of the latter.
  • the actuation of the lever 10 can be obtained either by means of a motorized control, such as that shown in Figures 1 and 8 in particular, or even by manual control, of the type visible in Figs 4 and 6 for example. It is, of course, possible to provide only the second of these possibilities, in particular in the case of low-end sewing machines, or, on the contrary, that the first, for sewing machines with high performance, such in particular electronic microprocessor sewing machines. Alternatively, such a type of machine could include both motorized control and manual control of the stuffing device according to the invention.
  • this device comprises a stepping motor 73 whose windings E1 and E2 (fig. 8) are supplied, in an appropriate manner, by "drivers" D1 and D2 controlled by a microprocessor ⁇ P, which, in a computerized sewing machine, can also be used for general control of the machine's functions.
  • the actuation of the switch 8 causes the impulse type information to be sent to the microprocessor alternately determining the commissioning of the driver D1 or of the driver D2 for a period of time sufficient to drive the foot 71 from its low position in its high position, and vice versa.
  • the housing of the motor 73 carries a barrel 73a, articulated on the housing of the sewing machine by means of two axes 73b (figs 1 and 3) projecting from the barrel 73a, on either side thereof. .
  • This barrel is crossed by the left end, in the drawing, of a threaded rod 73c extending in the extension of the shaft, not shown, of the motor, integral with this shaft, and engaged in a threaded passage 74a that has an axis 74c carrying two rollers 74b and forming part of a carriage 74 capable of rolling on the soleplate 70b of the lever 70, from the right end thereof to its left end and vice versa, according to the direction of rotation of the threaded rod 73c, that is to say of the armature of the stepping motor.
  • the length of the carriage stroke on the sole 70b is fixed by the number of control pulses sent by the drivers D1 and D2 on the windings E1 and E2 each time the switch 8 is actuated. This number will obviously be identical for each driver so that the stroke of the carriage will be the same in one direction or the other of its movement on the sole 70b.
  • the carriage 74 is fixed to the lower end of a bar 75 whose upper end, forked at 75a, slidably embraces a guide rod 76 fixed horizontally to the housing of the machine.
  • a spring 77 prestressed between the rod 76 and the carriage 74 on which it is supported and whose length is such that it remains under tension even when the bar 75 which carries it is disposed in its position inclined, shown in phantom in the drawing.
  • the assembly formed by the bar 75, the rod 76 and the spring 77 forms a sort of thrust cylinder exerting its action on the sole 70b of the lever 70 of which it will determine the angular position according to the position occupied at all times by the carriage 74 on the sole 70b. It will be recalled that the latter can be moved on this sole by rotation of the threaded rod 73c in one direction to the other, in the direction desired for the movement of the carriage 74.
  • the lever 70 will resume its low position as soon as, by a movement in the opposite direction of the carriage 74, the same vertical component of the force exerted by the spring 77 will pass to the right the support area of this lever.
  • the foot 71 and the lever 70 will be lifted quantity corresponding to this thickness: at the limit, the lever 70 and its foot 71 may even be temporarily driven into the high position shown in phantom in the drawing, giving way to the excess thickness of the material to be sewn without there being machine blocked.
  • the bar 75 will rise vertically by sliding its forked end 75a on the rod 76 and compressing the spring 77.
  • This bar will return to its usual axial position, smoothly, by relaxation of the spring 77, as soon as the foot 71 has passed over the temporary excess thickness of the material to be sewn.
  • the foot 71 and the lever 70 are somehow mounted on a real suspension allowing them to easily absorb all the obstacles that may present to them the surface of a sewing piece, even of relatively high thickness as is for example the case when it is a question of assembling several layers of coarse Jean type canvas or corduroy for example.
  • the stuffing device according to the invention may also include only a manual control of the kind illustrated by way of example in FIGS. 4 to 6.
  • Such a device differs from that described with reference to FIGS. 1 to 3 and 8 by the fact that the motor 73 and its annexed parts as well as the circuit which is the subject of FIG. 8 are deleted, with the corresponding modifications for the sewing machine housing especially. Therefore, the drive of the carriage 74 on the sole 70b * of the lever 70 * will be carried out by corresponding horizontal displacement, carried out manually, of a pull tab 78 secured to the carriage 70 * b and passing through a slot f formed in the housing of the machine, zipper that the user can control by finger action on a button 78 * fixed to the free end thereof (figs 1 and 6).
  • the stroke of the carriage 74 on the sole 70 * b of the lever 70 * is limited by meeting the rollers 74 * b with two pairs of stops, 70 * d and 70 * e alternately depending on the direction of movement of this carriage (fig. 5 ).
  • the rolling tracks 172 intended for the toothed sectors 170c of the lever 170 carrying the foot 171 could be cut from a single piece 180 constituting at the same time the lower flange of a motor step by step 190 for controlling the throwing movement of the needle bar of the machine.
  • the upper flange of this motor, 180 * would include a fork 180 * a at the end of which would be fixed the rod 176 allowing the axial sliding of the bar 175 of the pressure cylinder formed by this bar in cooperation with a coil spring 177.
  • the solution mentioned above makes it possible to combine the stuffing device according to the invention, the device for controlling the throwing of the needle bar and this needle bar to form a single aggregate, capable of being manufactured and mounted of independently, independently of the rest of the sewing machine, even in a workshop or factory distant from the final assembly location and at a time different from that of this assembly.
  • the adaptation mentioned above could be automatic thanks to a computerized program operated by the microprocessor of the circuit (figg. 8) and which would be accessible from various command keys, corresponding, each at a different position of the jack on the sole 70b, respectively 170b (figs 1 and 7), that is to say at an optimal pressure exerted by the presser foot of the machine on the material to be sewn, according to the characteristics which their own and the nature of the sewing pattern.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP89810850A 1988-11-30 1989-11-08 Dispositif presse-étoffe pour machine à coudre Expired - Lifetime EP0378965B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4437/88 1988-11-30
CH4437/88A CH677508A5 (zh) 1988-11-30 1988-11-30

Publications (2)

Publication Number Publication Date
EP0378965A1 EP0378965A1 (fr) 1990-07-25
EP0378965B1 true EP0378965B1 (fr) 1993-09-08

Family

ID=4276114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810850A Expired - Lifetime EP0378965B1 (fr) 1988-11-30 1989-11-08 Dispositif presse-étoffe pour machine à coudre

Country Status (14)

Country Link
US (1) US5042406A (zh)
EP (1) EP0378965B1 (zh)
JP (1) JPH02182287A (zh)
CN (1) CN1024026C (zh)
AU (1) AU619062B2 (zh)
BR (1) BR8906059A (zh)
CA (1) CA2004066A1 (zh)
CH (1) CH677508A5 (zh)
DD (1) DD296124A5 (zh)
DE (1) DE68909031T2 (zh)
ES (1) ES2045547T3 (zh)
PT (1) PT92427B (zh)
RU (1) RU1834933C (zh)
ZA (1) ZA899037B (zh)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1050913A (zh) * 1989-10-13 1991-04-24 曼飞那股份有限公司 用于将工具可拆换地安装在主动机构上的总成
CH684418A5 (fr) * 1990-11-29 1994-09-15 Mefina Sa Machine à coudre.
DE19918169A1 (de) * 1999-04-21 2000-10-26 Zsk Stickmasch Gmbh Höheneinstellung eines Stoffdrückers
US6170414B1 (en) 1999-05-07 2001-01-09 L&P Property Management Company Quilting machine with adjustable presser plate and method of operating the quilting machine
US6145456A (en) * 1999-05-07 2000-11-14 L&P Property Management Company Quilting machine with adjustable presser plate and method of operating the quilting machine
JP4185393B2 (ja) * 2003-04-16 2008-11-26 ペガサスミシン製造株式会社 ミシンのプレッサ装置
JP4478991B2 (ja) * 2008-02-15 2010-06-09 ヤマトミシン製造株式会社 ミシンの押え揚げ装置
DE102008016353A1 (de) * 2008-03-29 2009-10-08 Dürkopp Adler AG Nähmaschine
JP6552233B2 (ja) * 2015-03-20 2019-07-31 蛇の目ミシン工業株式会社 ミシン
CN110396775B (zh) * 2019-08-19 2024-06-04 宁波申洲针织有限公司 一种自动拼下摆罗纹装置
CN113502607A (zh) * 2021-08-11 2021-10-15 东莞诺德科技有限公司 一种女士皮包的自动打孔缝线设备

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1602140A (en) * 1923-12-31 1926-10-05 Samuel W Avis Presser-foot mechanism for sewing machines
FR614104A (fr) * 1925-04-07 1926-12-07 Junker & Ruh G M B H Presse-ouvrage pour machines à coudre les chaussures et le cuir
US2241778A (en) * 1939-06-02 1941-05-13 Giancola Nicholas Presser foot and multiple gauge for sewing machines
US2238796A (en) * 1939-06-10 1941-04-15 Singer Mfg Co Overedge sewing machine
US3437062A (en) * 1966-10-11 1969-04-08 Singer Co Mechanism for automatically adjusting the height of a top feed foot
US4166422A (en) * 1978-09-06 1979-09-04 Porter Robert E Top feed for sewing machine
JPS6332704Y2 (zh) * 1979-07-04 1988-08-31
US4214543A (en) * 1979-07-05 1980-07-29 The Singer Company Electronically controlled top feed arrangement for a sewing machine
GB2071170B (en) * 1980-01-31 1983-08-17 Brother Ind Ltd Work presser device for sewing machine
JPS57107187A (en) * 1980-12-25 1982-07-03 Tokyo Juki Industrial Co Ltd Upward feeding mechanism of sewing machine
DE3119716C1 (de) * 1981-05-18 1982-11-04 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Obertransporteinrichtung an einer Naehmaschine
US4480566A (en) * 1983-08-25 1984-11-06 The Singer Company Mending attachment for a sewing machine
DE3528295A1 (de) * 1985-08-07 1987-02-19 Pfaff Ind Masch Naehmaschine mit einer abtastvorrichtung

Also Published As

Publication number Publication date
RU1834933C (ru) 1993-08-15
DE68909031T2 (de) 1994-04-21
CH677508A5 (zh) 1991-05-31
PT92427A (pt) 1990-05-31
AU619062B2 (en) 1992-01-16
US5042406A (en) 1991-08-27
CN1024026C (zh) 1994-03-16
AU4569989A (en) 1990-06-07
DE68909031D1 (de) 1993-10-14
CA2004066A1 (fr) 1990-05-31
JPH02182287A (ja) 1990-07-16
CN1043171A (zh) 1990-06-20
DD296124A5 (de) 1991-11-21
PT92427B (pt) 1995-08-09
BR8906059A (pt) 1990-06-19
ZA899037B (en) 1990-09-26
EP0378965A1 (fr) 1990-07-25
ES2045547T3 (es) 1994-01-16

Similar Documents

Publication Publication Date Title
EP0378965B1 (fr) Dispositif presse-étoffe pour machine à coudre
EP0804888B1 (fr) Perfectionnements aux systèmes de réglage et de commande des divers éléments mobiles et/ou déformables d'un siège de bureau
JP3485341B2 (ja) ミシンの中押え高さ調整装置
FR2467901A1 (fr) Mecanisme d'alimentation pour machines a coudre
EP0122222B1 (fr) Machine à coudre
JPH0283157A (ja) ベルト式サンドペーパ研磨機
EP0566700B1 (fr) Procede de realisation d'un motif en relief sur un materiau textile a meches et dispositif de mise en ouvre
EP0020184B1 (fr) Perfectionnement aux machines à coudre comportant un dispositif de guidage automatique de la pièce
FR2465820A1 (fr) Dispositif a ourler a points invisibles pour matiere tubulaire
CH677804A5 (zh)
CH664776A5 (fr) Dispositif de selection de fils pour metier a tricoter.
WO1994001022A1 (fr) Literie constituee d'un sommier a dossier relevable et matelas adapte
FR2538422A1 (fr) Module de commande a boutons-poussoirs pour machines a coudre
JPS6315870B2 (zh)
JPS6121017Y2 (zh)
CN112796042B (zh) 一种缝纫机
JPS5844781B2 (ja) たて編機又は類似のもの用の柄出し装置の制御装置
EP0250303B1 (fr) Commutateur en particulier pour la commande des feux d'un véhicule automobile
BE519864A (zh)
FR2552456A1 (fr) Procede et dispositif pour coudre automatiquement sur un vetement une piece de tissu presentant des bords courbes
JPS6012520Y2 (ja) ミシンの上送り機構
JPS6042742B2 (ja) ミシンの送り歯のための調節装置
CH618224A5 (zh)
CN114990797A (zh) 一种缝纫机
EP0810311A1 (fr) Métier pour la réalisation de franges à tête gansée

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT SE

17P Request for examination filed

Effective date: 19900906

17Q First examination report despatched

Effective date: 19920128

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

REF Corresponds to:

Ref document number: 68909031

Country of ref document: DE

Date of ref document: 19931014

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19931101

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19931116

Year of fee payment: 5

ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19931123

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19931124

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19931130

Year of fee payment: 5

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19931130

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2045547

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19941108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19941109

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19941109

EAL Se: european patent in force in sweden

Ref document number: 89810850.1

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19941108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950801

EUG Se: european patent has lapsed

Ref document number: 89810850.1

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19951214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051108