EP0484485B1 - Nähmaschine - Google Patents

Nähmaschine Download PDF

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Publication number
EP0484485B1
EP0484485B1 EP91909276A EP91909276A EP0484485B1 EP 0484485 B1 EP0484485 B1 EP 0484485B1 EP 91909276 A EP91909276 A EP 91909276A EP 91909276 A EP91909276 A EP 91909276A EP 0484485 B1 EP0484485 B1 EP 0484485B1
Authority
EP
European Patent Office
Prior art keywords
ribs
limb
limbs
clamp
framework
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
EP91909276A
Other languages
English (en)
French (fr)
Other versions
EP0484485A1 (de
Inventor
Ingeborg Beau
Michel Combepine
Antonio Jimenez
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
Priority to AT91909276T priority Critical patent/ATE104376T1/de
Publication of EP0484485A1 publication Critical patent/EP0484485A1/de
Application granted granted Critical
Publication of EP0484485B1 publication Critical patent/EP0484485B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings

Definitions

  • a sewing machine comprising a frame having at least two substantially horizontal arms with which are associated at least one needle bar and its control mechanism, for one, and at least one mechanism for driving the material to be sewn and / or a loop sensor device, for the other, these arms projecting from the side of a connecting column.
  • the frame comprises, on the one hand, a structure made of synthetic material, plastic for example, forming a support base of the machine on which stands at least one support flange and, on the other hand, carried by this flange, a resistant framework having a general shape of U whose branches form, respectively, at least a part of the first and second of said arms and whose bottom constitutes at least a part of the column.
  • the synthetic material structure has a plurality of housings for positioning the frame on the structure, the fixing of the first on the second being obtained by means of flanges wrapping the framework in various places, fixed removably on the structure by screws.
  • the present invention aims to overcome these drawbacks.
  • the sewing machine visible in FIG. 1 has a housing 1 formed by assembling two shells, such as shell 1 a , which also constitutes one of the two elements of the frame of the machine, like which is described and illustrated in the document EP 337 952 A1 previously cited.
  • such a frame is constituted by the shell 1 and has a backbone resistant U-2 which appears in this case , in the form of a hollow body of hexagonal section, removably attached to this shell using three devices generically indicated by the reference 3 and whose structural features will be described later.
  • the positioning of the frame 2 on the frame 1 a is achieved by suitably profiled ribs, projecting from the bottom of the frame and the structural details of which will be indicated below with reference, in particular, to Figures 1 , 1A, 1B and 2.
  • the machine represented in FIG. 1 comprises a needle bar 4, a mechanism 5 for controlling the bar - needle, a drive mechanism for the sewing material and a loop sensor device, both indicated by the reference 6, these various elements being simply sketched in the drawing in the form of rectangles.
  • All of these members are traditionally driven from a motor 7 by means of a set of pulleys and belts, indicated generically by the reference 8, controlling two motor shafts 9 and 10 , respectively, passing through the upper arm of the framework 2, for the shaft 9, and the lower arm of the latter, for the shaft 10. Bearings not shown ensure the pivoting and the maintenance in a centered and horizontal position of the axes 9 and 10 in the respective arm of the frame.
  • the axes 9 and 10 are coupled to the mechanisms 5 and 6 respectively in a conventional manner in the field.
  • the frame 2, the axes 9 and 10, their bearings and the pulleys fixed at their respective right ends constitute an autonomous and removable unit which may, preferably , be manufactured in series, even in a place distant from where the final assembly of the machine will take place.
  • This unit could, moreover, constitute a spare assembly, in particular intended for "after-sales services" which could be called upon to repair a machine according to the invention including, for example, one or the other bearing carrying the axes 9 and 10 would turn out to be functionally deficient.
  • each fixing device 3 comprises, in essence, the elements which will now be described.
  • the positioning of the frame 2 on the shell 1 a is ensured, according to the invention, by a series of duly profiled ribs.
  • these are seven in number, namely two pairs of vertical ribs and identical 11a and 11b, 12a and 12b respectively, that comprises the upper portion of the shell 1a ( Figures 1 and 2), a horizontal rib 13, intended to cooperate with the bottom of the U formed by the framework 2 (FIG. 1A), and an additional pair of ribs 14a and 14b, projecting from the lower part of the shell of the housing (FIG. 1B).
  • the ribs of each pair of ribs are mutually parallel and are connected in pairs by two spacers 11c and 11d, 12c and 12d, 14c and 14d, for the ribs 11a, 11b; 12a, 12b; 14a, 14b, respectively.
  • the cross section of these spacers is trapezoidal.
  • the rib 11a has a cutout 11 e delimiting on the edge of this rib two bearing surfaces 11f and 11g whose respective inclination and spacing correspond substantially to those of a portion of the external lateral surface of the upper branch of the framework 2.
  • the ribs 11b, 12a and 12b have corresponding cutouts of the same shape and dimensions. In doing so, as soon as one position the frame 2, as illustrated, in contact with bearing surfaces of all of the ribs 11a, 11b, 12a and 12b, this frame occupies, with respect to the shell 1a, a perfectly defined position in the vertical direction in Figure 1 of the drawing.
  • the positioning of the frame 2 in the horizontal direction is provided by the rib 13 already mentioned which we see in Figure 1A that it has a cutout of shape and dimensions identical to those of the ribs 11a, 11b, 12a and 12b.
  • the ribs 14a and 14b (FIG. 1B), it will be noted that, unlike the ribs 11a and 11b, their portion forming a seat for the lower branch of the framework 2 has a completely rectilinear profile, without any cutting, so that the ribs 14a and 14b ensure the positioning of the framework on the framework only in the perpendicular direction in the plane of Figure 1 of the drawing (support of the frame 2 against the ribs 14a and 14b under the action of the clip 15).
  • the frame 2 is fixed to the frame which constitutes the shell 1 a of the housing by three flanges constituted by clips, such as the clip 15 shown on Figure 3A.
  • These clips are each formed by a segment of metal tape, made of spring steel for example, having a general shape of W, the free ends of which are wound at 15a and 15b to form a sort of hook.
  • the distance separating these hooks is much greater than that between the spacers 11c, 11d; 12c, 12d; 14c and 14d, already cited.
  • the ratio between the distance between the hooks 15a and 15b and the distance between the spacers 11c and 11d is around 1.4: this ratio can, of course, be different according to the type of material chosen for the clip 15 as well as according to the importance of the force which it is desired to exert on the frame 2, when the clip is mounted in the illustrated manner in figure 3.
  • the clip is pressed against the spacer 11c, and more particularly the bevelled face of the latter, then it is tightened by bringing the hook 15b of the hook 15a until this hook 15b comes to face the passage delimited by the spacer 11d and the framework 2, then the branch of the clip carrying this hook is engaged in this passage until the hook is beyond this spacer and the clip is allowed to relax to occupy the position illustrated in the drawing.
  • the dimensions of the clip 15 are such that, in this position, it comes to rest on the frame 2 with the most projecting portion, 15c (FIG. 3A), from the bottom of the W of the clip, at the same while it is in close contact with the spacers 11c and 11d by its hooks 15a and 15b as well as by the portions of its two branches which are adjacent to them.
  • the force F exerted by a clip, such as the clip 15, on the frame 2 is of course dependent on the dimensions of the latter and on the nature of the material which constitutes it. It should be sufficient to secure the framework 2 on the shell 1 a of the housing 1, in the position fixed by contact with the bearing surfaces (such as the surfaces 11f and 11g - Figure 3) provided for this purpose on the ribs 11a, 11b, 12a, 12b, 13 and 14a, 14b, both during the handling and transport operations of the sewing machine and, of course, during the operation thereof.
  • the bearing surfaces such as the surfaces 11f and 11g - Figure 3
  • a clip in a sewing machine of the type described, the importance of the mechanical forces transmitted to the frame 2 by the drive mechanisms of the needle bar or of the loop sensor, by example, is relatively reduced and that the part of these forces which affects the fixing clips is also reduced, so that such a clip could for example be formed by forming a section of steel tape- spring, with a thickness of the order of 4 to 5 / 10ths of a mm and a width of about ten millimeters.
  • the overall dimensions of a clip may be 7 to 8 cm in width (distance from the hooks) and 4 to 5 cm in height.
  • the fixing of the framework 2 is also ensured by means of elastic clips, such as the clip 150 (FIG. 5A).
  • Such a clip which in substance also has a general shape in W, has at the free ends of its two branches two portions 150a and 150b, folded in V, to form kinds of hooks by which the clip wraps and takes on the faces lateral and dorsal spacers 11c and 11d already mentioned.
  • the clip 150 of the present variant is mounted by spreading its two branches, for example by first placing the "hook” 150a resting on the spacer 11c then by tilting the clip by a pivoting movement, anti-clockwise and around this spacer while sufficiently spacing the two branches of the clip to allow the "hook” 150b to pass under the spacer 11d and at the rear thereof. The clip is then allowed to slightly relax so that it occupies the position illustrated in FIG. 5.
  • the three fixing clips that comprise the sewing machine according to the invention are of identical structure and are mounted in the same way.
  • each device for fixing the frame 2 to the shell 1 a of the machine housing comprises, in substance, two main parts, namely a locking bracket 16 and a control lever 17.
  • the lever 17 is constituted by a filiform U-shaped frame, for example metallic, the free ends of its branches of which are bent at 90 ° at 17a and 17b and are wound on themselves, in their intermediate part, to form scrolls 17c and 17d ( Figure 6).
  • This lever 17 is engaged, by its ends 17a and 17b, in openings 11h and 11i crossing the ribs 11a and 11b, respectively, and forming "bearing" for the lever 17.
  • This lever can therefore be tilted by pivoting of its ends 17a and 17b in said openings 11h and 11i.
  • the stirrup 16 is also constituted by a U-shaped wire frame, the free ends 16a and 16b of which are bent at 90 ° and are pivotally mounted by engagement, with play, in the volutes 17c and 17d, respectively, of the lever 17.
  • the stirrup can therefore be tilted relative to this lever while following the latter in its own tilting.
  • each of the U-shaped branches of the stirrup 16 is subdivided into five sectors 16c, 16d, 16e, 16f and 16g. It is indeed this yoke which is intended to maintain the frame 2 of the shell 1 a of the sewing machine casing, especially when the caliper is driven and locked under tension in that position occupies in FIG. 7, in which the portion 16g, bent in the shape of a hook, is taken on the spacer 11d already mentioned: the stirrup is then in contact with the framework 2 by its sections 16d and 16th and exerts, on thereof, the force necessary to ensure the positioning of this frame on the bearing surfaces 11f and 11g of already cited and its attachment to the shell 1a of the housing 1 of the machine.
  • this position of the stirrup 16 is a stable position, insofar as the fictitious plane, passing simultaneously by the contact zone of the legs of the stirrup 16, in particular of sections 16d and 16e of each branch, with the framework 2 and by the longitudinal axis of the bent parts 16a and 16b of these branches, that is to say to say in substance by the pivot axis of the latter in the volutes 17c and 17d of the control lever 17, extends to the right, in the drawing (FIG. 7), of the longitudinal axis of the bent parts, 17a and 17b, of this lever, that is to say by the pivot axis of the lever 17 relative to the ribs 11a and 11b.
  • this framework will be positioned correctly on the shell 1 a by simply placing it, by its two horizontal branches and by its vertical portion, at the junction of these branches, on the bearing surfaces provided on the ribs 11a and 11b, 12a and 12b, 13, 14a and 14b.
  • the fixing of the framework 2 on this shell will be obtained by implementing the three clamping devices in the manner described above.
  • the invention is, of course, not limited to what has been described and shown: in particular, it is obvious that it would be possible to obtain the positioning and the fixing of the framework 2 on the shell 1 a of the sewing machine housing by making use of "clips" of shape and / or structure different from those illustrated in the drawings.

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

Claims (3)

  1. Nähmaschine mit einem Gehäuse, das aufweist:
    einem Ständer, der einen ersten und einen zweiten im wesentlichen waagrechten Arm trägt; die in Zuordnung zum ersten Arm eine Nadelstange (4) und einen ersten Mechanismus (5) zur Betätigung der Nadelstange trägt; und die in Zuordnung zum zweiten Arm eine erste Einrichtung zum Mitnehmen des zu nähenden Materials (6), eine zweite Schleifensensoreinrichtung und einen zweiten Mechanismus (8, 10) zur Betätigung der genannten Einrichtungen trägt, wobei das Gehäuse eine Struktur besitzt, die aufweist:
    einen Sockel und eine Armatur in Form eines U (1a), die auf dem Sockel montiert ist und einen ersten und einen zweiten Arm, die sich parallel übereinander erstrecken, sowie einen Zwischenabschnitt besitzt, der die entsprechenden Enden des ersten und des zweiten Armes verbindet, wobei der erste und der zweite Arm der Armatur mindestens einen Teil des jeweils ersten bzw. zweiten Armes des Gehäuses bilden,
    wobei ein Traggerüst (2) in Form eines U einen dritten und einen vierten Arm und mindestens ein Verbindungsglied zwischen dem dritten und dem vierten Arm besitzt,
    Mittel, die das Positionieren des dritten und des vierten Armes des Traggerüstes jeweils auf dem ersten bzw. auf dem zweiten Arm der Armatur bewirken,
    eine Vielzahl von Schellen (15), die den dritten und den vierten Arm des Traggerüstes auf dem ersten und dem zweiten Arm der Armatur in der von den genannten Mitteln definierten Position fixieren, wobei jede Schelle Festhalteglieder (15a, 15b) umfaßt, die mit entsprechenden Befestigungsgliedern (11c, 11d) zusammenwirken, welche fest mit dem ersten und dem zweiten Arm der Armatur verbunden sind,
    dadurch gekennzeichnet, daß die genannten Mittel umfassen:
    einerseits eine erste (11a, 11b) und eine zweite Reihe (12a, 12b) von Rippenpaaren, die fest mit dem ersten bzw. mit dem zweiten Arm der Armatur (1a) verbunden sind, wobei die Rippen (11a, 11b; 12a, 12b) jedes Rippenpaares untereinander Abstand halten und quer zur Längsachse der Arme der Armatur ausgerichtet sind, und wobei die Befestigungsglieder (11c, 11d) fest mit den Rippen verbunden sind, und,
    andererseits mindestens eine zusätzliche Rippe (13), die mit dem Zwischenabschnitt der Armatur fest verbunden ist und in Querrichtung zur Ausrichtungsachse der Rippen der ersten (11a, 11b) und der zweiten (12a, 12b) Reihe der Rippenpaare verlaufen,
    wobei jede der Rippen einen Ausschnitt (11e) besitzt, der sich über einen Abschnitt der Länge ihrer Firstkante öffnen, und bei dem mindestens ein Abschnitt (11f, 11g) des Randes den Sitz für einen Abschnitt des dritten Armes des Traggerüstes (2), für die Rippen (11a, 11b) der genannten ersten Reihe, bzw. für einen Abschnitt des vierten Armes des Traggerüstes (2), für die Rippen (12a, 12b) der genannten zweiten Reihe bzw. für einen Abschnitt des Verbindungsstückes des Traggerüstes (2) und für die zusätzliche Rippe (13) bildet,
    wobei jede Schelle (15) im Raum zwischen den Rippen eines bestimmten Rippenpaares, das der betreffenden Schelle angehört, angeordnet ist, wobei dieses durch seine Festhalteglieder (15a, 15b) mit den Befestigungsgliedern (11c, 11d) der Rippen des betreffenden bestimmten Rippenpaares (Fig. 1, 3 und 7) in Halteverbindung stehen.
  2. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß jede Schelle (15) aus einem Bandelement aus elastisch verformbarem Material besteht, dessen Enden in Form von Haken umgebogen sind und die genannten Festhalteglieder (15a, 15b) bilden; und daß die Befestigungsglieder (11c, 11d) aus einem Abstandshalterpaar bestehen, an dem die Haken der Schelle angreifen und die, mit einem Ende, an der ersten (11a) der beiden Rippen fest verbunden sind, zwischen denen sich die Schelle befindet, und die mit dem anderen Ende mit der zweiten (11b) der beiden Rippen fest verbunden sind, wobei die Abstandshalter zu beiden Seiten des Ausschnittes (11e) jeder Rippe angeordnet sind (Fig. 2 und 3).
  3. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß jede Schelle (15) aus einem Bügel (16) zum Verriegeln der Schelle, und einem Hebel (17) zur Betätigung des Bügels (16) besteht; daß der Hebel (17) die allgemeine Form eines U's bildet, das einen fünften und einen sechsten Arm besitzt, welche durch ein zweites Verbindungselement dieser Arme vereinigt sind, und deren Enden (17a, 17b) abgewinkelt und schwenkbar in Durchgängen (11h, 11i) gefaßt sind, die in die eine oder in die andere Rippe jedes Rippenpaares (11a, 11b) eingearbeitet sind, zwischen denen sich die Schelle (15) befindet, wobei der mittlere Abschnitt (17c, 17d) des fünften und des sechsten Armes des Hebels (17) auf sich selbst umgebogen sind, um eine Spirale (17c, 17d) mit mindestens einer einzelnen Windung zu bilden; daß der Bügel (16) weiter die Form eines U's besitzt, das einen siebten und einen achten Arm aufweist, welche durch ein drittes Verbindungselement dieser Arme vereinigt sind und von denen ein erstes, freies Ende abgewinkelt und schwenkbar in die Öffnung der Spirale (17c) des fünften Armes eingreift, was das freie Ende (16a) des siebten Armes anbetrifft, und daß in der Öffnung der Spirale (17d) des sechsten Armes gelagert ist, was das freie Ende (16b) des achten Armes anbetrifft, wobei das zweite Ende des siebten und des achten Armes des Bügels (16) umgebogen ist, um einen Festhaltehaken (16g) zu bilden, der mit dem dritten Verbindungselement zusammenwirkt; und daß die Rippen (11a, 11b) jedes der Rippenpaare miteinander durch einen gemeinsamen Abstandshalter (11d) verbunden sind, der aus einem Befestigungsglied für den Festhaltehaken (16g) in der verriegelten Position der Schelle (Fig. 6 und 7) besteht.
EP91909276A 1990-05-23 1991-05-17 Nähmaschine Expired - Lifetime EP0484485B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91909276T ATE104376T1 (de) 1990-05-23 1991-05-17 Naehmaschine.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH1763/90A CH683353A5 (fr) 1990-05-23 1990-05-23 Machine à coudre.
CH1763/90 1990-05-23
PCT/CH1991/000119 WO1991018139A1 (fr) 1990-05-23 1991-05-17 Machine a coudre

Publications (2)

Publication Number Publication Date
EP0484485A1 EP0484485A1 (de) 1992-05-13
EP0484485B1 true EP0484485B1 (de) 1994-04-13

Family

ID=4217994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91909276A Expired - Lifetime EP0484485B1 (de) 1990-05-23 1991-05-17 Nähmaschine

Country Status (15)

Country Link
US (1) US5231942A (de)
EP (1) EP0484485B1 (de)
JP (1) JPH05500021A (de)
KR (1) KR920703908A (de)
CN (1) CN1024824C (de)
AU (1) AU640022B2 (de)
BR (1) BR9105768A (de)
CA (1) CA2064087A1 (de)
CH (1) CH683353A5 (de)
DE (1) DE69101691T2 (de)
ES (1) ES2051592T3 (de)
PT (1) PT97729A (de)
RU (1) RU1838480C (de)
WO (1) WO1991018139A1 (de)
ZA (1) ZA913843B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH684418A5 (fr) * 1990-11-29 1994-09-15 Mefina Sa Machine à coudre.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1101788A (fr) * 1954-03-24 1955-10-11 L Usien De La Marque Soc D Machine à coudre
US2946302A (en) * 1958-10-28 1960-07-26 Krasnitz Jacob Artistic cover for sewing machines
US3420200A (en) * 1966-02-03 1969-01-07 Singer Co Modular sewing machines
US4274349A (en) * 1979-04-05 1981-06-23 Doyel John S Toy electric sewing machine
US4552081A (en) * 1985-06-03 1985-11-12 The Singer Company Skeletal frame sewing machine
CH675600A5 (de) * 1988-04-14 1990-10-15 Mefina Sa

Also Published As

Publication number Publication date
DE69101691D1 (de) 1994-05-19
JPH05500021A (ja) 1993-01-14
US5231942A (en) 1993-08-03
PT97729A (pt) 1993-06-30
RU1838480C (ru) 1993-08-30
CN1024824C (zh) 1994-06-01
CN1057303A (zh) 1991-12-25
KR920703908A (ko) 1992-12-18
BR9105768A (pt) 1992-08-04
AU7788291A (en) 1991-12-10
WO1991018139A1 (fr) 1991-11-28
CA2064087A1 (fr) 1991-11-24
ZA913843B (en) 1992-02-26
EP0484485A1 (de) 1992-05-13
AU640022B2 (en) 1993-08-12
CH683353A5 (fr) 1994-02-28
ES2051592T3 (es) 1994-06-16
DE69101691T2 (de) 1994-08-25

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