EP0371919A1 - Nähmaschine - Google Patents

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Publication number
EP0371919A1
EP0371919A1 EP89810881A EP89810881A EP0371919A1 EP 0371919 A1 EP0371919 A1 EP 0371919A1 EP 89810881 A EP89810881 A EP 89810881A EP 89810881 A EP89810881 A EP 89810881A EP 0371919 A1 EP0371919 A1 EP 0371919A1
Authority
EP
European Patent Office
Prior art keywords
thread
channel
wire
housing
sewing machine
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.)
Withdrawn
Application number
EP89810881A
Other languages
English (en)
French (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 EP0371919A1 publication Critical patent/EP0371919A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B51/00—Applications of needle-thread guards; Thread-break detectors
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B43/00—Spool-pin assemblies incorporated in sewing machines

Definitions

  • the present invention relates to a sewing machine comprising a housing having a lower arm, an upper arm, a column uniting these arms and in the upper arm of which a needle bar is slidably mounted and a thread-pulling lever is mounted oscillating, means for driving this needle bar and this thread-pulling lever according to respective synchronous reciprocating movements and means for guiding the thread between a supply spool and a needle carried by the needle bar, defining a trajectory of this thread which cuts a portion of the trajectory of the thread-pulling lever to allow the drive of said thread in at least one direction of movement of the thread-pulling lever.
  • the thread puller comprises a thread gripping opening and a ramp adjacent to an inlet channel of this gripping opening.
  • This thread puller is driven in an oscillating movement in synchronism with the reciprocating sliding movement of the needle bar.
  • a passage containing the trajectory of the wire puller is provided in the upper arm of the machine housing to allow the wire gripping opening to exit the housing.
  • Thread guiding means are used to maintain a section of this thread through the outlet passage of the thread guide, in the path of the ramp adjacent to the inlet channel, so that when the thread puller is moved towards the wire, the ramp meets it and slides it over it, moving it away from its path until it enters the grip opening through the inlet channel.
  • An extension located opposite the inlet channel of the gripping opening prevents the untimely exit of the wire.
  • This thread puller therefore allows the automatic introduction of the thread by the simple fact that it is guided through the outlet passage of the thread guide and therefore extends transversely to its path.
  • the thread guiding means leading the thread from the feed reel to the needle bar needle.
  • several thread guides are arranged along the passage of the thread and in particular at the place where the thread changes direction to descend towards the needle. After being guided in a horizontal guide groove along which a wire clamp is arranged, the wire leaves the groove and must be introduced into a retaining guide before being brought into a vertical groove comprising guide members in which this wire must be introduced. Consequently, threading the thread, apart from that which relates to the thread puller, remains fairly traditional and therefore remains meticulous work requiring in particular good vision on the part of the operator. This addition of this threading also constitutes a source of frequent errors.
  • the object of the present invention is to further simplify this threading operation.
  • the subject of this invention is a sewing machine according to claim 1.
  • the machine shown in the drawing has a base 1 on the right part of which stands a column 2 carrying two arms 3 and 4, including the one occupying the lower position, 3, contains in particular a loop sensor and its control mechanism, both not shown, and whose upper arm, 4, carries a needle bar 5 and its drive mechanism 6, partially shown, a thread tensioner assembly 7, the structural features of which will be illustrated in detail by below, a device 8 for adjusting the tension of the wire f and its control wheel 9 (FIG. 2), a flywheel 10 and a bobbin winder 11 associated with this flywheel (FIG. 3).
  • the upper and left lateral faces (FIGS. 2 and 4) of the machine housing are provided with a rectilinear channel 12, extending in the longitudinal direction of the housing, approximately in the median plane of the arm 4.
  • this channel has a section having the general shape of a V whose shape is partially circular. It will be noted, moreover, that the device for adjusting the tension of the wire 8 is partially disposed inside this channel 12, more precisely by the active portion of the wire tightening plates that it comprises.
  • the machine housing shown also has a second channel, 13, extending in a transverse plane and communicating with the channel 12, at the right end of the latter (FIG. 2), hollowed out both on part of the face upper of column 2 of the housing than on the rear face thereof, up to the vicinity of the flywheel 10 and of the winder 11 already mentioned.
  • the section of the channel 13 is similar in shape to that of the channel 12.
  • the channels 12 and 13 serve in fact for the passage of the thread taken from a supply spool 14 to the needle 5a fixed at the end of the needle bar 5, respectively to the winder 11 depending on which one wishes to use the machine shown for sewing or, on the contrary, for winding a bobbin 11.
  • the column 2 comprises a housing 2a, accessible through an opening 2b ( Figures 3 and 5), along the lower edge of which is hinged a door 15 capable of being driven manually in two limit positions , one, tilted, shown in solid lines in Figure 5, providing access to the housing 2a of the column 2, the other, of rest in which the gate closes the opening 2b.
  • a pawl 16, fixed along the upper edge of the door 15, ensures that the latter is in the closed position of the housing 2a, in cooperation with a lug, not shown, fixed near the upper edge of the opening 2b.
  • the gate 15 is integral with a base 17 for a coil support 18 standing parallel to the gate 15.
  • the gate 15 is in vertical position for closing the housing 2a of the column 2; it is driven in its tilted position ( Figure 5) only when it comes to replacing the coil 14 for example.
  • the wall of the housing 2a has an opening 2c, putting this housing in communication with the bottom of the channel 12, respectively 13, and on the edges of which are fixed two wire references 20a, 20b respectively.
  • this wire must first of all be led between the clamping plates of the tensioning device 8, at a level making it possible to ensure the best possible operation of its plates. It must, moreover, be presented to the right of an opening 22 made at the left end, in the drawing (FIGS. 1, 2 and 7) of the channel 12 so as to be able to be grasped in passing, by the tensioning assembly of wire 7.
  • the wire tensioning assembly 7 comprises a wire pulling lever 23 that forms the left arm (FIG. 1) of a bent U-shaped rod, articulated by its intermediate portion 24 in two bearings 25a and 25b secured to the frame of the machine.
  • the right branch 26 of this rod is slidably engaged in a corresponding opening that has a stud 27 pivoted at the end of an arm 28 cabled on a shaft 29.
  • This shaft is that intended for controlling the alternating axial movement of the needle bar 5, movement obtained by the mechanism 6.
  • the two branches 23 and 16 of the wire tensioner assembly are not coplanar, the branch 23 occupying, seen from the front face of the machine, a position set back relative to the branch 26 such that, when the latter occupies its most forward tilted position, the branch 23 is placed as shown in solid lines in FIG. 6.
  • the axis 23 * corresponds to the maximum rear position in which can be driven branch 23: in this case, at the same time, branch 26 will occupy an angular position corresponding substantially to the maximum forward position of branch 23 (in solid lines in the drawing).
  • the wire puller that constitutes the branch 23 is bent so as to form a sort of eyelet 23a which is followed by a straight portion 23b, itself followed by a bent portion 23c, forming a "hook", the end of which follows a portion 23d, forming a "ramp", comprising three sections, one of which, starting from the edge of the opening of the hook 23c, substantially parallel to the terminal portion of the eyelet 23a, delimits therewith a channel 23e, a second section of which extends parallel to the upper branch of the hook, and the third of which goes, away from this hook, to a level lower than that of the branch of the hook secured to the part 23b of the hook.
  • the length of the space enveloped by the branches of the hook is several times greater than the diameter of the largest thread capable of being used by the sewing machine described. It can for example be five to seven times this diameter.
  • the length of the hook, the distance separating the open end of the hook and the part 23b mentioned above, as well as the spacing of the access channel delimited by this part and by the "ramp" 23d are substantially equal. and also a function of the maximum diameter of the sewing thread.
  • the machine shown is provided with two leaf springs 28a and 28b fixed by one end to the right edge, in the drawing, channel 12 and the other end of which is inserted into the bottom of the circular section of this channel, in contact with the latter.
  • the blade 28a and the blade 28b are flexible enough to obtain flexion by simply applying the wire on their upper face and by exerting, with fingers, a slight vertical thrust on the wire.
  • the length of the wire puller 23 and the dimension of its parts 23a to 23d are chosen such that the distance separating the mean longitudinal axis from the body of the hook 23c and the axis of articulation of the thread puller are spaced from each other by a value corresponding substantially to the average distance separating the part of the channel 12 of circular section and the same axis of articulation above.
  • the stroke of the thread puller 23 is chosen such that, at the right end thereof, in which this thread puller is shown in solid lines, the hook of the thread puller occupies practically a centered position relative to the axis of translation of the wire f.
  • the hook 23c of the thread puller can penetrate the channel 12 to reach this centered position thanks to the presence of the opening 22 already mentioned.
  • the four figures 9a to 9d show, in detail, how the wire puller proceeds to grasp the wire 7 and pass it through the opening of its hook.
  • the ramp 23d comes into contact with the thread f and pushes it upwards, in the drawing, by sliding on the ramp itself as the lever continues to move in the direction F to go beyond the portion occupied in FIG. 9a.
  • the assembly described allows the production of a sewing machine in which it is no longer necessary to thread the thread through an eyelet of the thread puller before passing it through the needle flange.
  • the channel 12 need not necessarily be located on the upper face of the upper arm of the machine. It could very well be formed on the anterior or posterior face of this arm, for example, or extend only over part of the length of the arm.
  • the channel or channels described could be obtained by juxtaposition of the junction edges of these shells, to which the profile of one half of the channel would be given individually. longed for.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP89810881A 1988-11-30 1989-11-17 Nähmaschine Withdrawn EP0371919A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4438/88 1988-11-30
CH4438/88A CH677509A5 (de) 1988-11-30 1988-11-30

Publications (1)

Publication Number Publication Date
EP0371919A1 true EP0371919A1 (de) 1990-06-06

Family

ID=4276130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810881A Withdrawn EP0371919A1 (de) 1988-11-30 1989-11-17 Nähmaschine

Country Status (12)

Country Link
US (1) US5063866A (de)
EP (1) EP0371919A1 (de)
JP (1) JPH02182291A (de)
KR (1) KR900008096A (de)
CN (1) CN1023943C (de)
AU (1) AU618646B2 (de)
BR (1) BR8906041A (de)
CA (1) CA2003960A1 (de)
CH (1) CH677509A5 (de)
PT (1) PT92428B (de)
RU (1) RU2051236C1 (de)
ZA (1) ZA899036B (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0570478U (ja) * 1992-02-28 1993-09-24 シンガー日鋼株式会社 ミシンの水平糸立棒支持装置
JP2002095882A (ja) * 2000-09-26 2002-04-02 Brother Ind Ltd 上糸カセット及び上糸交換装置
WO2002053821A1 (fr) * 2000-12-27 2002-07-11 Brother Kogyo Kabushiki Kaisha Machine a coudre avec cassette de fil d'aiguille et cassette de fil d'aiguille
JP3960175B2 (ja) * 2002-09-10 2007-08-15 ブラザー工業株式会社 ミシン及びこのミシンに装着される糸カセット
EP1637638A1 (de) * 2004-09-17 2006-03-22 Elna International Corp. S.A. Nähmaschine
EP1681381B1 (de) * 2005-01-12 2007-05-02 BERNINA International AG Garnrollenhalter für eine Mehrzahl von Oberfadenspulen
JP4862907B2 (ja) * 2009-03-24 2012-01-25 ブラザー工業株式会社 多針式ミシン
JP2011019700A (ja) * 2009-07-15 2011-02-03 Brother Industries Ltd 糸立て装置及びミシン
JP2011019699A (ja) * 2009-07-15 2011-02-03 Brother Industries Ltd 糸立て装置及びミシン
JP5532979B2 (ja) * 2010-02-01 2014-06-25 ブラザー工業株式会社 多針式ミシン
US9032889B2 (en) * 2011-03-04 2015-05-19 Brother International Corporation Cartridge selection mechanism for a sewing machine
CN106637727B (zh) * 2016-11-30 2022-03-04 西安标准工业股份有限公司 一种电子控线张力面线线头稳定机构及其控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1938018A (en) * 1930-09-17 1933-12-05 Doubler Charles W H Thread control mechanism
US2656805A (en) * 1949-11-23 1953-10-27 Gallaz And Co Sewing machine
EP0204426A1 (de) * 1985-05-07 1986-12-10 Jaguar Co., Ltd. Oberfadenleitvorrichtung für Nähmaschine

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH467888A (fr) * 1967-12-22 1969-01-31 Mefina Sa Dispositif tire-fil caché pour machine à coudre
FR2023072A1 (de) * 1968-11-12 1970-08-07 Du Pont
US3749039A (en) * 1972-10-24 1973-07-31 Singer Co Cassette threading arrangement in sewing machines
US4070977A (en) * 1976-11-02 1978-01-31 Aisin Seiki Kabusihki Kaisha Sewing machine
US4296701A (en) * 1980-11-06 1981-10-27 The Singer Company Threading arrangement for chainstitch sewing on a sewing machine
US4466371A (en) * 1983-07-11 1984-08-21 The Singer Company Threading arrangement for a sewing machine
JPS61151681A (ja) * 1984-12-26 1986-07-10 小島プレス工業株式会社 車両用デイスプレイ装置
SE8500404D0 (sv) * 1985-01-29 1985-01-29 Husqvarna Ab Anordning av tradtilldragare pa en symaskin
JPS61206480A (ja) * 1985-03-11 1986-09-12 ブラザー工業株式会社 ミシン
CA1301555C (en) * 1986-06-23 1992-05-26 Yoshio Mikuni Thread take-up lever device for sewing machines
JPH0728975B2 (ja) * 1987-03-19 1995-04-05 蛇の目ミシン工業株式会社 ミシンの自動上糸掛け装置
US4776292A (en) * 1987-12-07 1988-10-11 Ssmc Inc. Demand responsive sewing machine take-up and threading arrangement therefor
CH677119A5 (en) * 1988-10-28 1991-04-15 Mefina Sa Sewing machine - has additional free-wheeling clutch between motor and hand-wheel to allow motor to be used in reverse for bobbin winding

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1938018A (en) * 1930-09-17 1933-12-05 Doubler Charles W H Thread control mechanism
US2656805A (en) * 1949-11-23 1953-10-27 Gallaz And Co Sewing machine
EP0204426A1 (de) * 1985-05-07 1986-12-10 Jaguar Co., Ltd. Oberfadenleitvorrichtung für Nähmaschine

Also Published As

Publication number Publication date
BR8906041A (pt) 1990-06-19
CN1043174A (zh) 1990-06-20
CA2003960A1 (fr) 1990-05-31
CH677509A5 (de) 1991-05-31
PT92428A (pt) 1990-05-31
AU4570189A (en) 1990-06-07
ZA899036B (en) 1990-09-26
AU618646B2 (en) 1992-01-02
CN1023943C (zh) 1994-03-09
RU2051236C1 (ru) 1995-12-27
JPH02182291A (ja) 1990-07-16
KR900008096A (ko) 1990-06-02
PT92428B (pt) 1995-08-09
US5063866A (en) 1991-11-12

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

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Owner name: MEFINA S.A.

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Effective date: 19960601