EP0337952A1 - Nähmaschine - Google Patents

Nähmaschine Download PDF

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Publication number
EP0337952A1
EP0337952A1 EP89810270A EP89810270A EP0337952A1 EP 0337952 A1 EP0337952 A1 EP 0337952A1 EP 89810270 A EP89810270 A EP 89810270A EP 89810270 A EP89810270 A EP 89810270A EP 0337952 A1 EP0337952 A1 EP 0337952A1
Authority
EP
European Patent Office
Prior art keywords
frame
elements
sewing machine
machine according
plastic
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
EP89810270A
Other languages
English (en)
French (fr)
Other versions
EP0337952B1 (de
Inventor
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
Publication of EP0337952A1 publication Critical patent/EP0337952A1/de
Application granted granted Critical
Publication of EP0337952B1 publication Critical patent/EP0337952B1/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
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2209/00—Use of special materials
    • D05D2209/10—Particular use of plastics

Definitions

  • the present invention relates to a sewing machine, the frame of which has a column and two superimposed arms projecting laterally from this column and carrying, the upper arm, at least one sewing needle and a control mechanism and, the inner arm , at least one drive mechanism for the material to be sewn and / or one loop sensor device.
  • This invention also relates to a method of manufacturing this sewing machine.
  • Sewing machine frames include a column fixed to a base, two superimposed arms extending laterally to this column.
  • the upper arm carries at least one sewing needle and its control mechanism and, the lower arm generally a loop sensor device and a mechanism for driving the material to be sewn.
  • the frame of the machine in fact forms a housing and has, inside, different bearing surfaces and bearings for receiving the various organs of the machine.
  • the external face of the case gives the machine an essential part of its "design".
  • an internal frame even simplified to the maximum, must ensure the rigidity of the machine to guarantee correct operation of its structural elements. If a plastic frame, in the form of a housing, can be made sufficiently rigid because of its structure and the thickness of its walls, this is not necessarily the case of an internal frame of general U shape, especially if, without affecting the rigidity of the assembly, we want to reduce its weight as much as possible, and therefore the cost, while retaining optimal functional features.
  • the purpose of the present invention is precisely to provide a satisfactory solution to the objectives of simplification and rationalization mentioned above without however harming the rigidity of the sewing machine.
  • the present invention relates to a sewing machine frame according to claim 1, a sewing machine comprising such a frame and a method of manufacturing this frame.
  • the frame object of the invention allows great flexibility in the design of the machine. It can be used for sewing machines of all types. It is particularly suited to the design of modular machines. It also offers great flexibility with regard to the dressing of the machine, both aesthetically and functionally.
  • the frame B illustrated in FIG. 1 contains an armature 1 visible in FIG. 2, comprising two rods 2 and 3, solid or tubular, passing through the openings of two parallel plates 4 and 5.
  • armature 1 can be fixed to each other by welding or gluing, for example.
  • These elements can be made of various materials, metallic or not.
  • metallic materials one can consider the use of aluminum, aluminum alloys or also magnetic metals, for the reasons that will be explained later.
  • reinforced composite materials in particular matrices of polymers reinforced with filaments or fibers, for example carbon, Kevlar® or glass.
  • This frame 1 is partially embedded in a molded plastic body 6, U-shaped which includes an upper arm 7, a lower arm 8 and a vertical part of the column 9 connecting the upper 7 and lower arms 8.
  • the plates 4 and 5 constituting the armature of the column 9 of the frame B exit perpendicularly below the lower arm 8 to which is attached a base 10, made of metal and / or plastic, for example
  • Rods 2 and 3 protrude at the free ends respective arms 7 and 8 and thus offer positioning and fixing surfaces suitable for receiving the sewing mechanisms, upper and lower, of the sewing machine, symbolized in this variant by the two parallelepipeds M1 and M2 and representing for example respectively the control mechanism of the sewing needle and that ensuring the transport of the fabric and the formation of the stitch in cooperation with the needle.
  • rods 2 and 3 have a tubular structure, they could be used in particular for the passage of transmission, control or connection members not shown, for the mechanisms M1 and M2 or even for the passage of electrical connections of all kinds.
  • the frame 1 illustrated in Figure 1 is only one of the multiple embodiments. It is in particular possible, as illustrated by FIG. 3, to produce a frame 11 in one piece from a cylindrical profile bent in a U shape. Such a profile need not necessarily have a circular section. This can be triangular, square, U-shaped, X-shaped, T-shaped, double T-shaped, etc.
  • the reinforcement described does not necessarily have to extend inside all the parts of the frame. It can for example be limited to the plates 4 ′ and 5 ′ embedded in a column 9 ′ of the frame B, as is for example the case in the variant illustrated in FIG. 4.
  • the arms 7 ′ and 8 ′ of the frame no longer includes reinforcement. They may have housings 7 ′ a respectively 8 ′ a intended for positioning and fixing the mechanisms M1 and M2. These housings 7 ′ a and 8 ′ a may extend over the entire length of the frame B or over only a part.
  • This frame B further comprises a base 10 ′ which has come in one piece by molding, with the rest of this frame.
  • FIG. 5 shows a frame B, similar to that of FIG. 4, in which the frame is composed only of two solid or tubular rods 2 ′ and 3 ′ extending in the arms 7 ′ and 8 ′.
  • Different plastic materials can be used for the production of the molded part of the frame B.
  • polyester in particular polyethylene terephthalate (PETP), in particular that of Du Pont sold under the brand Rynite®, loaded with 30 to 55% of fibers, in particular glass fibers, molding temperature being between 260 ° and 300 ° C.
  • PETP polyethylene terephthalate
  • Rynite® polyethylene terephthalate
  • crystalline polyesters such as the product sold by Rhône-Poulenc, under the brand Teschster® T 20,000 VM 45 or E 20,021 V 35, loaded in particular with 20 to 30% of glass fibers, the molding temperature. being from 230 ° to 300 ° C.
  • Nylon, type polyamide 6.6 can also be used, in particular that marketed by Schulman under the brand Schulamid® loaded with 35 to 50% of glass fibers or other fillers and molded at a temperature of 280 ° to 300 ° C.
  • the reinforcement 1 can be reduced, as illustrated by the variants of FIGS. 4 and 5, or complete, as illustrated by FIGS. 1, 2 and 6 for example, by extending inside all parts of the frame.
  • the complete or partial reinforcement is positioned in a mold which is then filled with the plastic intended to drown the reinforcement.
  • the plastic material can, for example be injected or expanded in this mold, depending on the case.
  • the plastic part of the frame B can be molded in one or more pieces, independently of the frame which is then subsequently fixed to the plastic part.
  • this plastic part of the frame B is in one piece 16, as illustrated in FIG. 7, each of the arms 17 and 18 of this frame must be traversed longitudinally of a housing 17 a respectively 18 a whose cross section right will have the same profile as that of the rods 2 and 3 of the armature 1 of the same nature as that of FIG. 2.
  • the section of the housings 17 a , 18 a may however be slightly larger or slightly smaller than that of the rods 2 and 3, according to the method of fixing the frame 1 to the plastic part 16 of the frame B.
  • the section of the housing 17a, 18a should be slightly lower than that of the rods.
  • the heating will be at the wall of the housing 17a, 18a and may be obtained by heating the rods 2 and 3. If they are hollow, the heating may be achieved by introducing, inside the tubular rods 2 and 3, a heating fluid or an electrical resistance during the hunting of the rods 2 and 3 in the housings.
  • the heating temperature should reach a sufficient value for reflowing locally the thermoplastic material so that, once the rods 2 and 3 inserted into the housings 17 a, 18 a, is allowed to cool it off, the rods being then securely fixed in these housings.
  • the rods 2 and 3 are made of a magnetic material, it is possible to heat them by electromagnetic induction during their hunting.
  • the rods can be both solid and tubular.
  • the rods can be chased by heating them with ultrasound.
  • the housing section 17a, 18a could also be slightly higher than that of rods 2 and 3: the attachment could then be obtained by making use of a thermosetting resin, such as an epoxy resin, the polymerization of the resin being able to be carried out using the same heating means as those described above.
  • a thermosetting resin such as an epoxy resin
  • the rods could have a polygonal section to facilitate deformation.
  • This overpressure can be obtained by various means: using a pressurized fluid introduced inside the rods themselves or by blowing up an explosive charge inside the rods temporarily closed.
  • FIG. 8 corresponds to that of FIG. 7, the molded part 16 then being formed by two shells 16 a , 16 b each having imprints 17 a ′, 18 a ′ respectively 17 a ⁇ , 18 a ⁇ which , in this example, each substantially correspond to half of the cross section of the rods 2 respectively 3 of the frame 1.
  • the rods 2 and 3 of the frame 1 are sandwiched between the shells 16 a , 16 b taking place in the cavities 17 a ′, 17 a ⁇ and 18 a ′, 18 a ⁇ .
  • the imprints 17 a ′, 17 a ⁇ , 18 a ′, 18 a ⁇ (or only one of them at least by forming each of the housings intended to receive the rods 2 and 3 slightly less deep than that of the corresponding part of the rod to be received) so as to provide a very slight clearance between the assembly faces 16 c , 16 d of the shells once the rods 2 and 3 of the frame 1 are sandwiched between they.
  • Fixing screws 21, directed perpendicular to the assembly faces 16 c , 16 d make it possible to fix these shells to one another and to tighten the rods 2 and 3 in their respective housings.
  • the variant visible in FIG. 9 differs from the previous one essentially by replacing the shell 16b (fig. 8) with three flanges 19a, 19b and 19c capable of enclosing the rods 2 and 3 of the frame and their fixing in homologous housings of the shell 16a using screws 22.
  • the frame is formed by an L-shaped section angle, angled in a U, the opening of the profile is occupied by a block of plastic material 24, of homologous shape.
  • the two wings of the angle iron can, if desired, constitute a portion of the covering of the machine itself.
  • FIGS. 10B to 10D illustrate the possible use, for the same purposes, of reinforcements formed from angle sections of U, J or T section. Other types of angle bars are obviously usable as a variant.
  • the resistant frame of the frame is no longer embedded in the mass of plastic but is arranged outside of it. It is generally in direct intimate contact with this mass only through a portion of the lateral face.
  • the reinforcement may even constitute part of the mold necessary for obtaining the mass of plastic material which is intended for it: this way of proceeding makes it possible to obtain a very good mechanical connection. between the reinforcement and the plastic and, consequently, a homogeneous distribution of the mechanical stresses to which the frame will be subjected during the operation of the sewing machine that will incorporate it.
  • the invention is, of course, not limited to what has been shown in FIGS. 1 to 10D and to the description which refers to it. It will be noted, in particular, that all of the possible construction possibilities envisaged can be used "mutatis mutandis” also in the construction of sewing machines without free arms, called “base” machines, that is to say machines in which the work surface consists of a portion of the lower arm, thus also forming the base of the machine (fig. 11).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP89810270A 1988-04-14 1989-04-07 Nähmaschine Expired - Lifetime EP0337952B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1375/88 1988-04-14
CH1375/88A CH675600A5 (de) 1988-04-14 1988-04-14

Publications (2)

Publication Number Publication Date
EP0337952A1 true EP0337952A1 (de) 1989-10-18
EP0337952B1 EP0337952B1 (de) 1993-02-24

Family

ID=4208955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810270A Expired - Lifetime EP0337952B1 (de) 1988-04-14 1989-04-07 Nähmaschine

Country Status (6)

Country Link
US (1) US5140918A (de)
EP (1) EP0337952B1 (de)
JP (1) JPH01313088A (de)
CH (1) CH675600A5 (de)
DE (1) DE68904975T2 (de)
ES (1) ES2038843T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991018139A1 (fr) * 1990-05-23 1991-11-28 Mefina Sa Machine a coudre
EP0488955A1 (de) * 1990-11-29 1992-06-03 Mefina S.A. Nähmaschinengehäuse

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6694902B2 (en) * 2001-09-27 2004-02-24 Brother Kogyo Kabushiki Kaisha Sewing machine frame having reinforced structure and sewing machine provided with the frame
US6796255B2 (en) * 2001-09-27 2004-09-28 Brother Kogyo Kabushiki Kaisha Sewing machine frame having reinforced structure and sewing machine provided with the frame
US20050204977A1 (en) * 2004-02-17 2005-09-22 Tseng Hsien Chang Sewing machine body and method for making the same
US20050178308A1 (en) * 2004-02-17 2005-08-18 Chang Tseng H. Sewing machine body
JP2006129944A (ja) * 2004-11-02 2006-05-25 Aisin Seiki Co Ltd ミシン
US7040243B1 (en) * 2004-12-07 2006-05-09 Tseng Hsien Chang Body structure for sewing machine
JP4971004B2 (ja) * 2007-03-29 2012-07-11 株式会社鈴木製作所 ミシンのフレーム構造
US7934611B2 (en) * 2008-04-04 2011-05-03 Target Brands, Inc. Rack accessories

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1395834A (fr) * 1964-03-06 1965-04-16 Mach A Coudre Cosson Perfectionnements aux machines à coudre
FR1537818A (fr) * 1967-07-17 1968-08-30 Mach A Coudre Cosson Perfectionnement aux machines à coudre
DE2558450A1 (de) * 1975-12-23 1977-07-07 Koemmerling Kunststoff Blend- und/oder fluegelrahmen fuer fenster und tueren aus kunststoff
GB1530875A (en) * 1976-11-15 1978-11-01 Western Stamping Corp Sewing machine
DE2722824A1 (de) * 1977-05-20 1978-11-23 Fuchs Fa Otto Verfahren zum biegen von hohlprofilen
DE2908346A1 (de) * 1979-03-03 1980-09-11 Wilfried Ing Grad Droege Rahmen- und/oder strukturbauelement
US4440434A (en) * 1981-12-24 1984-04-03 Aldo Celli Vehicle body construction

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3420200A (en) * 1966-02-03 1969-01-07 Singer Co Modular sewing machines
JPS618866Y2 (de) * 1981-01-14 1986-03-19
JPS618866U (ja) * 1984-02-28 1986-01-20 株式会社島津製作所 ガスクロマトグラフ−質量分析装置
JPS61149198A (ja) * 1984-12-22 1986-07-07 ジャガー株式会社 ミシン
EP0188888B1 (de) * 1984-12-22 1989-07-05 Jaguar Co., Ltd. Nähmaschinengehäuse
US4552081A (en) * 1985-06-03 1985-11-12 The Singer Company Skeletal frame sewing machine
JPS6350037A (ja) * 1986-08-20 1988-03-02 Sumitomo Eaton Noba Kk ウエハ用カセツト

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1395834A (fr) * 1964-03-06 1965-04-16 Mach A Coudre Cosson Perfectionnements aux machines à coudre
FR1537818A (fr) * 1967-07-17 1968-08-30 Mach A Coudre Cosson Perfectionnement aux machines à coudre
DE2558450A1 (de) * 1975-12-23 1977-07-07 Koemmerling Kunststoff Blend- und/oder fluegelrahmen fuer fenster und tueren aus kunststoff
GB1530875A (en) * 1976-11-15 1978-11-01 Western Stamping Corp Sewing machine
DE2722824A1 (de) * 1977-05-20 1978-11-23 Fuchs Fa Otto Verfahren zum biegen von hohlprofilen
DE2908346A1 (de) * 1979-03-03 1980-09-11 Wilfried Ing Grad Droege Rahmen- und/oder strukturbauelement
US4440434A (en) * 1981-12-24 1984-04-03 Aldo Celli Vehicle body construction

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
INGENIEURS DE L'AUTOMOBILE, no. 4, juin 1983, pages 29-42, Paris, FR; M. ROUBINET: "Critères de choix de pièces en matériaux composites" *
INGENIEURS DE L'AUTOMOBILE, no. 4, juin 1983, pages 81-84, Paris, FR: M.M. COSTES et al.: "Le SMC: Une technique industrielle pour l'automobile?" *
PRODUCT ENGINEERING, avril 1973; "Weight-saving foam plastic sandwiches form auto chassis" *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991018139A1 (fr) * 1990-05-23 1991-11-28 Mefina Sa Machine a coudre
US5231942A (en) * 1990-05-23 1993-08-03 Mefina S.A. Sewing machine housing with removable inner framework
AU640022B2 (en) * 1990-05-23 1993-08-12 Mefina S.A. Sewing machine
EP0488955A1 (de) * 1990-11-29 1992-06-03 Mefina S.A. Nähmaschinengehäuse
US5205230A (en) * 1990-11-29 1993-04-27 Mefina S.A. Sewing machine

Also Published As

Publication number Publication date
US5140918A (en) 1992-08-25
EP0337952B1 (de) 1993-02-24
CH675600A5 (de) 1990-10-15
ES2038843T3 (es) 1993-08-01
DE68904975T2 (de) 1993-06-17
JPH01313088A (ja) 1989-12-18
DE68904975D1 (de) 1993-04-01

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