US3791325A - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
US3791325A
US3791325A US00251643A US3791325DA US3791325A US 3791325 A US3791325 A US 3791325A US 00251643 A US00251643 A US 00251643A US 3791325D A US3791325D A US 3791325DA US 3791325 A US3791325 A US 3791325A
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United States
Prior art keywords
wheel
wheels
work feeding
pinion
housing
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Expired - Lifetime
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US00251643A
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English (en)
Inventor
Koninck A De
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KONINCK A DE
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KONINCK A DE
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Filing date
Publication date
Priority claimed from BE768175A external-priority patent/BE768175A/xx
Application filed by KONINCK A DE filed Critical KONINCK A DE
Application granted granted Critical
Publication of US3791325A publication Critical patent/US3791325A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/20—Work-feeding means constituted by sewing needles
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/10—Work-feeding means with rotary circular feed members
    • D05B27/12—Work-feeding means with rotary circular feed members rotating continuously

Definitions

  • ABSTRACT Foreign Application Priority Data A sewing machine with a pair of wheels for conveying June 7, 1971 Belgium 104320 material layers to be joined by stitching.
  • the conveying wheels are arranged in the stitch-forming area with [52] US. Cl. 112/213, 1 12/214 each wheel associated with a member for driving said [51] Int. Cl. D05b 27/10, D05b 27/20 wheel continuously with the same peripheric speed, [58] Field of Search 112/213, 214 To the needle block are associated members driving said block alternately along the conveying direction.
  • References Cited One of said wheels is retractable to allow feeding of UMTED STATES PATENTS the material layers to be joined by stitching.
  • This invention pertains to a sewing machine which comprises at least one needle and two superposed wheels for conveying the material layers to be stitched, said wheels engaging one another with the circumference thereof through said material layers.
  • One of the proposed solutions lies in adding to the usual mechanism with conveying claw and presser foot, a conveying roller driven intermittently, which is arranged on the presser foot side but with a staggering relative to the claw.
  • Such an arrangement which is not usable for sewing narrow edgings, does not prevent the staggering of the upper layer relative to the lower layer as the upper layer driving is disturbed by two unaligned drives, and moreover the synchronizing of the drive by the claw and the rollers is impossible, which also adds to an improper working of the machine.
  • WEEK- A known solution of a different kind, applied to machines with presser foot and conveying claw, lies in imparting to the needle block in addition to the usual alternating movement in and out of the material layers to be stitched, an alternating movement along the conveying direction said movements the resultant of which is an oscillating motion of the needle block about an axis moving along the direction of the material layers to be joined, comprise an operating travel during which the needle (needles) being located in the material layers, takes said layers along in the conveying direction together with the claw, and a dead travel required to return the needle block and the claw to the starting point.
  • the wheels are arranged sidewise relatively to the needle as considered along the stitching direction, the needle receives an oscillating movement along the stitching direction, between two positions lying on either side of a vertical plane that passes through the wheel axes, each one of said wheels is connected to a continuous drive member with the same circumferential speed, and the upper wheel is provided with a raising device to allow the feeding and pressing between the wheels of the material layers to be stitched.
  • the conveying wheels are arranged between the machine area with the needles and the inner stitch-forming members, and a housing inside which are arranged two driving members the one end of which projects outside the housing and bears a pinion for powering a driving pinion co-axial with the conveying wheel, the upper conveying wheel as well as the driving pinion thereof being rotatably mounted on a shaft supported by a cage which is rotatably mounted about the power pinion, said shaft being connected to a lever for raising the cage by rotating thereof about the power pinion.
  • FIG. 1 is an elevation view partly in section and with parts broken away, of a sewing machine according to the invention.
  • FIG. 2 is an end view partly in section of the machine shown in FIG. 1.
  • FIG. 3 is a section view with parts broken away, along line lII--III in FIG. 2.
  • FIG. 4 is a section view with parts broken away, along line IVIV in FIG. 1.
  • FIGS. 5a to 5d diagrammatically show the positions of the conveying wheels and of a needle by different moments in the operating cycle of the machine according to the invention.
  • the sewing machine comprises a housing 1 with a lower portion 1' inside which is supported a crank-shaft 2 which is driven by a shaft not shown and an upper portion 1" inside which is supported a main upper shaft 3 which is driven by a belt 4 from the crank-shaft 2.
  • the crank-shaft 2 has a throw 5 on which swings a rod 6 hinged to an oscillating lever 7 of an axis 8 which bears in turn a pair of hooks 9 which cooperate to form the stitch with on the one hand, a pair of needles 10 and on the other hand, a pair of spreaders 11 which are attached to an alternating-motion axis 12.
  • the needles 10 are attached to the end of a needle bar 13 with which they comprise the needle block the needle bar is slidingly' supported in a frame 14 which oscillates in a way described below.
  • a small block 15 mounting the foot ofa lever 16 which is hinged on the other hand to a pivot 17 supported by a cam 18 which is made fast to the end of the main upper shaft 3.
  • This set of members moves alternately the needles 10 along the direction of bar 13, in and out of the material layers of an article to be stitched, by passing through a needle plate 19 on the housing 1.
  • the frame 14 is arranged at the end of a shaft 20 which is supported by bearings in the housing 1 and at the other end of which is attached the foot of a lever 21 which is associated to an eccentric 22 mounted on the main upper shaft 3,
  • This set of members causes the needle bar to oscillate about the axis of shaft 20.
  • the crank-shaft 2 bears a worm wheel 23 meshing with a worm 24 which is made fast to a shaft 25 extending in a plane at right angle to the shaft 2, slantwise from bottom to top between a level lying below the needle plate 19 and a level above said plate 19.
  • the shaft 25 bears a pair of spaced worms 26,27 which each mesh with a worm wheel 28,29 respectively mounted on a shaft 30,31 in parallel relationship with the main shaft 2.
  • Each one of said shafts 30,31 bears at that end thereof'projecting from the housing 1 which lies on the side of the stitch-forming members (needles 10, hooks 9, spreaders 11), a pinion 32,33 which meshes in turn with a larger-diameter pinion 34,35 which is integral with one of the superposed wheels 36,37 for conveying the material layers to be stitched.
  • the unit comprising the lower conveying wheel 36 and the pinion 34 is rotatably mounted on a shaft 38 which is supported by a cage 39 which is connected to the housing in 50 on that side opposite the wheel 36, the cage 39 supports through bearings 42 the shaft 30.
  • the unit comprising the upper conveying wheel 37 and the pinion is rotatably mounted on a shaft 40 which is fixedly mounted in a cage 41 which is rotatably mounted about the shaft 31 by means of bearings 43 the axis 40 projects inside a recess 44 of housing 1 where it bears the foot of a link 45 which is hinged on the other hand on a lever 46 which is supported by a pivot 47 projecting from the housing 1 the lever bears an operating handle 48 which allows to retract the conveying wheel 37 through rotating of the cage 41 and therewith of the unit comprised of the conveying wheel 37 and pinion 35 about the pinion 33 to allow the feeding of the material layers to be stitched between the conveying wheels 36,37.
  • the profile of the conveying wheel circumference is selected in any suitable way to provide driving without slipping of the material layers to be joined by stitching.
  • the serrated showing in the drawings is not limitative. The construction allows moreover to exchange the wheels to adapt same to the kind of work to be performed.
  • the lower conveying wheel 36 passes through the needle plate so as to enter in a way known from the usual conveying claws, the material layers to be stitched facing said wheel.
  • the material layers are continuously driven on either side of the sewing plane by the conveying wheels 36,37 in the stitch-forming area, the needles 10 moving together with the material layers, at the same speed and along the same direction, from that moment where they enter said layers until the moment where they leave said layers.
  • the material layers go on being fed in such a way that if as usual, the needles remain in the material layers during half the working cycle of the machine, the stitch length will be substantially twice as long as the needle path measured along the stitching line.
  • FIGS. 5a to 5d A working cycle of the machine according to the invention, corresponding to a 360 rotation of shafts 2 and 3, has been shown diagrammatically in FIGS. 5a to 5d.
  • a sewing machine for stitching material layers comprising:
  • said upper and said lower wheels each mounted on a driving shaft with their axes of rotation in the same vertical plane horizontally parallel to each other;
  • said upper wheel and said driving pinion rotatably mounted on said shaft about the said power pinion.
  • a sewing machine as claimed in claim 1 which comprises a control shaft arranged slanting upwards inside said housing, crosswise relative to the driving shafts; said control shaft bearing two worms a pinion rotating together with one of said driving shafts;
  • a sewing machine comprising:
  • a rotary drive shaft disposed at least partially in said housing
  • a lower work feeding rotary wheel which wheels form a pair of work feeding wheels in pressure contact with one another, having their axis of rotation arranged horizontally parallel one to the other and in the same vertical plane;
  • an upper and a lower rotating driving member each for one of said work feeding wheels, said driving members extending from a region within said housing to a region external thereof; connection within said housing from said shaft for continuously rotating said driving members;
  • each first pinion means being in driving engagement with one second pinion means to continuously rotate said work feeding wheels
  • a cage rotatably mounted on that part of said upper driving member which is external of said housing, said upper work feeding wheel and its associated second pinion means being rotatably mounted on a shaft carried by said cage;
  • stitchrforming members comprising:
  • a sewing machine comprising:
  • a rotary drive shaft disposed at least partially in said housing
  • a lower work feeding rotary wheel which wheels form a pair of work feeding wheels in pressure contact with one another, having their axis of rotation arranged horizontally parallel one to the other and in the same vertical plane;
  • said driving member extending from a region within said housing to a region external thereof; connection within said housing from said shaft for continuously rotating said driving member;
  • a second pinion means mounted co-axial with said upper work feeding wheel
  • said first and second pinion being in driving engagement to continuously rotate said upper work feeding wheel
  • stitch forming members comprising:
  • a reciprocating needle carrying bar extending in a vertical plane adjacent said work feeding wheels; and A means for oscillating said needle carrying bar for shifting the needle in the direction of feed whenever it is engaged with the work between two positions lying on either side' of said vertical plane containing both wheels rotating axis.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US00251643A 1971-06-07 1972-05-09 Sewing machine Expired - Lifetime US3791325A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE104320 1971-06-07
BE768175A BE768175A (fr) 1971-06-07 1971-06-07 Machine a coudre.

Publications (1)

Publication Number Publication Date
US3791325A true US3791325A (en) 1974-02-12

Family

ID=25647557

Family Applications (1)

Application Number Title Priority Date Filing Date
US00251643A Expired - Lifetime US3791325A (en) 1971-06-07 1972-05-09 Sewing machine

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US (1) US3791325A (enExample)
FR (1) FR2141079A5 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019170707A (ja) * 2018-03-28 2019-10-10 ペガサスミシン製造株式会社 ミシンの針棒駆動機構

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470502A (en) * 1945-10-20 1949-05-17 Union Special Machine Co Sewing machine
US2844113A (en) * 1955-07-05 1958-07-22 Union Special Machine Co Continuous feed needle feed sewing machine
US2866426A (en) * 1956-04-17 1958-12-30 Pfaff Ag G M Feeding mechanism for sewing machines
US3216386A (en) * 1962-01-03 1965-11-09 Necchi Spa Sewing machine with upper needle point and lower wheel feed

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470502A (en) * 1945-10-20 1949-05-17 Union Special Machine Co Sewing machine
US2844113A (en) * 1955-07-05 1958-07-22 Union Special Machine Co Continuous feed needle feed sewing machine
US2866426A (en) * 1956-04-17 1958-12-30 Pfaff Ag G M Feeding mechanism for sewing machines
US3216386A (en) * 1962-01-03 1965-11-09 Necchi Spa Sewing machine with upper needle point and lower wheel feed

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019170707A (ja) * 2018-03-28 2019-10-10 ペガサスミシン製造株式会社 ミシンの針棒駆動機構

Also Published As

Publication number Publication date
FR2141079A5 (enExample) 1973-01-19

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