EP0081289A1 - Machine à coudre automatique à aiguilles multiples - Google Patents

Machine à coudre automatique à aiguilles multiples Download PDF

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Publication number
EP0081289A1
EP0081289A1 EP82305575A EP82305575A EP0081289A1 EP 0081289 A1 EP0081289 A1 EP 0081289A1 EP 82305575 A EP82305575 A EP 82305575A EP 82305575 A EP82305575 A EP 82305575A EP 0081289 A1 EP0081289 A1 EP 0081289A1
Authority
EP
European Patent Office
Prior art keywords
needle
thread
inactive
machine according
active
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
EP82305575A
Other languages
German (de)
English (en)
Other versions
EP0081289B1 (fr
Inventor
Adolph Stephen Dorosz
Francis Andrew Wickers
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.)
Cambio Ragione Sociale british United Shoe Machine
Original Assignee
British United Shoe Machinery Ltd
USM Corp
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
Priority claimed from US06/315,415 external-priority patent/US4448139A/en
Priority claimed from US06/364,495 external-priority patent/US4450781A/en
Application filed by British United Shoe Machinery Ltd, USM Corp filed Critical British United Shoe Machinery Ltd
Publication of EP0081289A1 publication Critical patent/EP0081289A1/fr
Application granted granted Critical
Publication of EP0081289B1 publication Critical patent/EP0081289B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/06—Devices for severing the needle or lower thread and for disposing of the severed thread end ; Catching or wiping devices for the severed thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B53/00—Thread- or cord-laying mechanisms; Thread fingers
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B55/00—Needle holders; Needle bars
    • D05B55/14—Needle-bar drives
    • D05B55/16—Needle-bar drives with provision for disengaging individual needle bars
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/02—Pneumatic or hydraulic devices
    • D05D2207/04—Suction or blowing devices

Definitions

  • This invention is concerned with automatic sewing machines, comprising a plurality of needles each of which is movable into and out of an active (or stitching) position in which it is aligned with a needle drive bar, the or each other needle being held in an inactive position.
  • thread control means is provided for controlling the thread supplied to the or each inactive needle so as to ensure that such thread does not interfere with the thread supplied to the active needle during the operation of the latter.
  • the thread control means conveniently comprises, associated with each inactive needle position, a thread end removal device for drawing out of the way the thread end extending beyond the needle in such inactive position.
  • a thread end removal device for drawing out of the way the thread end extending beyond the needle in such inactive position.
  • each thread end removal device comprises a vacuum tube arranged adjacent its associated inactive needle position. More specifically, the end of each vacuum tube is preferably arranged adjacent the eye of the needle against the direction of feed of the thread through the eye.
  • the thread end removal device comprises a reciprocable thread-wiping finger arranged adjacent its associated inactive needle position and co-operative with a surface to clinch the end of the thread, extending beyond the needle when in its inactive position, against said surface to draw it out of the way.
  • the surface may conveniently be provided by a plate fixidly disposed parallel to the path of movement of its associated wiping finger, the latter being biassed against its associated plate.
  • a single motor may be provided for effecting reciprocating movement of the wiping fingers, the latter being effective only to draw the thread end of the or each inactive needle out of the way, while avoiding engagement with the thread supplied to the active needle.
  • the thread control means of the machine in accordance of the invention may also comprise, associated with each inactive needle position, a thread-nipping device by which, when a needle is in such inactive position, the thread supplied thereto is secured against being pulled from the eye thereof.
  • each thread-nipping device comprises a clamp element arranged adjacent its associated inactive needleposition and co-operative with a surface of a holder for the needle, the arrangement being such that the thread is clamped between said clamp element and said surface when the needle is moved to the inactive position.
  • the thread control means may also comprise, associated with each needle, a thread pull-back device including a guide element movable between an advanced position adjacent its associated needle and a retracted position spaced apart from the needle, the arrangement being such that when a needle is in the active position its associated guide element is in its advanced position, and when a needle is in an inactive position its associated guide element is in its retracted position.
  • a thread pull-back device including a guide element movable between an advanced position adjacent its associated needle and a retracted position spaced apart from the needle, the arrangement being such that when a needle is in the active position its associated guide element is in its advanced position, and when a needle is in an inactive position its associated guide element is in its retracted position.
  • the machine in accordance with the invention now to be described is an automatic sewing machine 20 capable of sewing two different threads into an item to be stitched.
  • the threads may be of a different colour, texture, or size, depending upon the requirements of the item being sewn.
  • the sewing machine 20 comprises a housing 22 disposed on a work support table 24.
  • a stitching mechanism 26 is disposed at one end of the housing 22 and is connectively associated therethrough by a drive shaft 28 to a drive means 30 at the other end of the housing 22.
  • An indexing mechanism 32 is connected to the stitching mechanism 26 to effectuate shuttling therein.
  • a thread monitor generally designated 34 controls the thread feed and usage and checks for irregularities associated therewith.
  • the stitching mechanism 26 is shown more clearly in Figure 2, which mechanism comprises a needle-holding cage 36 which mounts against the lower side of the housing 22, and which cage 36 has a pair of opposed channels 38 which each slidingly receive a shoulder 40 of a needle holder indexer 42.
  • a first needle 44 and a second needle 46 are each secured in a needle holder 48, 40 respectively, slidably received in an opening 52 within the needle holder indexer 42.
  • the holder indexer 42 has an extension 54 which slides under a bracket 56 one end of which is secured to the needle-holding cage 36.
  • the other end of the bracket 56 pivotally supports an indexing cylinder 58, which comprises a part of the indexing mechanism 32.
  • the indexing cylinder 58 has a piston (not shown) and a piston rod 60 which is pivotally connected to one end of an indexing lever 62.
  • the other end of the indexing lever 62 is swingably connected to the extension 54 of the needle holder indexer 42.
  • An elbow 64 disposed near the midpoint of the indexing lever 62 is pivotally attached to the bracket 56.
  • a needle bar 86 shown in Figure 2, has an arrangement of flanges 88 on the lower end thereof, which flanges 88 slidingly mate successively with a pair of opposed channels 90 on the upper end of each needle holder 48, 50.
  • the upper end of the needle bar 86 is pivotally connected to the lower end of a connecting rod 92 ( Figure 3) which is journalled on a crank shaft 94, on the end of the drive shaft 28, shown also in Figures 1 and 6.
  • a presser foot 82 is disposed adjacent the active position for the needles 44 and 46, and is reciprocably held by a presser foot bar 84 which extends through a fitting in the needle-holder cage 36.
  • the thread monitor 34 shown in Figures 4, 5 and 7, comprises an axis 96, journalled into a ferrule 97 supported in the housing 22, the axis 96 having a pair of thread-engaging wheels 98 rotatively disposed thereon.
  • a disk 100 having perforations arranged on its periphery, is secured to a side of each wheel 98, in a manner similar to the arrangement shown in U.S. Patent 3,843,883, which is now incorporated herein by reference.
  • the peripheral perforations are counted by a photoelectric device 102 adapted with an encoder, not shown, to monitor the thread usage.
  • the photoelectric device 102 is pivotally mounted on a shaft 104 secured to the housing 22, and may be swung out of the way to permit thread to be wound around the thread-engaging wheels 98, which pivoting out of the way is shown in dashed lines in Figures 4 and 5.
  • An adjustment knob 106 is threadably received on the distal end of the shaft 96, which knob 106.may be rotated to compress a sprin ⁇ 108 or biasing member between the knob 106 and an annular non-rotative housing 110 disposed on the axis 96 and against a friction disk 112 adjacent the outer thread-engaging wheel 98.
  • a roller thrust bearing 114 is disposed between the contiguous sides of the inner and outer thread-engaging wheels 98, and a second friction disk 116 is disposed against the inner side of the inner thread-engaging wheel 98 and into abutting contact with a non-rotative portion of the ferrule 97 as shown in Figure 7.
  • the machine in accordance with the invention also comprises thread control means for controlling a thread 160 (or 170) supplied to the needle44 (or 46) which is in an inactive position, during the operation of the needle in the active position.
  • the thread control means comprises thread-nipping means generally designated 66, comprising a first thread-nipper, in the form of a biasing element or resilient wheel 68 mounted on a first bracket 70 and secured to the needle-holder cage 36, and a second thread-nipper in the form of a biasing element or resilient wheel 74 mounted on a second bracket 76 and also secured to the needle-holder cage 36.
  • the thread control means comprises thread end removal means generally designated 72 comprising two vacuum tubes 78 having their distal ends disposed adjacent the inactive position of each needle 44, 46 respectively, as shown in Figures 1 and 2.
  • the tubes 78 are connected to a manifold 80 which is secured to the needle-holder cage 36.
  • the manifold 80 is connected to a vacuum source (not shown).
  • the thread control means further comprises a take-up lever 120 ( Figures 4 and 5) which extends through slot 122 in the housing 22 and has a distal portion 124 with two orifices through which the two threads 160, 170 pass.
  • the take-up lever 120 is shown in both its upper and its lower position in both Figures 4 and 5.
  • the thread control means comprises thread pullback means generally designated 126, shown in Figures 1, 3 and 4, which comprises one associated with each needle 44, 46 a first and a second pressurizable cylinder 128, 130, attached to a bracket arrangement 132 secured to the housing 22.
  • Each pressurizable cylinder 128, 130,actuatable by proper means (not shown), is a double-acting pressurizable cylinder, and each has an upper piston rod 134 and a lower piston rod 136 extending from their upper and lower ends respectively.
  • a guide ring 138 is arranged on the distal end of each lower piston rod 136.
  • the drive shaft 28 ( Figures 1 and 6) is turned by the drive means 30, which includes a motor (not shown) and is attached to a drive belt 140, which travels about a pulley 142 on the drive shaft 28.
  • a disk 144 is disposed on the drive shaft 28 adjacent the pulley 142.
  • the disk 144 has a wedge-shaped detent 146 arranged therein, as shown in Figure 6.
  • a pressurizable cylinder 148 is attached to the frame 22 of the sewing machine 20, by a bracket 150 secured generally under the drive shaft 28.
  • the cylinder 148 has a movable piston rod 152 extending therefrom.
  • a wedge-shaped extension 154 is attached to the distal end of the movable piston rod 152, mateable with the wedge-shaped detent 146 in the disk 144 on the drive shaft 28.
  • the two thread filaments 160, 170 ( Figures 4 and 5) are unwound from their respective spools (not shown) and extend through openings in a guide bracket 172 attached to the frame 22 above the thread monitor 34.
  • the threads 160, 170 each pass through a thread retainer 174, 176 beneath the guide bracket 172 and are each wound around one of the thread-engaging wheels 98 while the photoelectric device 102 is pivoted out of the way therefrom (as shown by the phantom lines in Figures 4 and 5).
  • the threads 160, 170 are then drawn around a guide spring 178 and through the guide rings or loops 138 on the distal end of each of the lower piston rods 136 on the thread pullback means 126, thence through their respective orifices on the distal portion 124 of the take-up lever 120, each thence through a channel 180 in the front shoulder40 of the needle-holder indexer 42.
  • the threads then extend through an opening on a tab 49 on the lower portion of the needle holders 48, 50, and through the eyes of their respective needles 44, 46.
  • the stitching mechanism 26 may be activated, once the desired needle 44 or 46 is shuttled to the active position, the remaining needle 44 or 46 at the same time being shuttled to the inactive position.
  • the active (or stitching) position is located directly beneath the needle bar 86.
  • the respective inactive positions of the two needles 44,46 are immediately adjacent the active position, one at either side thereof (see Figures 8 and 9).
  • each needle 44 or 46 may be shuttled from its respective inactive position to the active position, while the other needle 44 or 46 is shuttled to its respective inactive position from the active position by actuation of the indexing cylinder 58, upon receipt of a proper signal, causing pivotal movement of the indexing lever 62 about its pivot point in the elbow 64 thereof.
  • each of the needle holders 48, 50 has a channel therethrough and a detent 184 through which its associated needle 44, 46 may pass.
  • a ball 186 is biased by a spring 188 within the centre of the needle bar into the detent 184, to properly locate and help secure the needle holder 48 or 50 precisely in the active position while stitching.
  • Each inactive position has a biased ball 190 arranged between a locator plate 192 and the needle holder cage 36 to mate with the detent 184, to properly locate and hold secure the needle holder 48 or 50 in its inactive position while the other needle holder 48 or 50 is in the active position, as shown between the Figures 8 and 9.
  • the thread pullback means 126 is shown including a pair of adjustable bolts or stops 194 attached to the upper portion of the bracket 132. They are utilized to regulate the amount of upward travel of the upper piston rods 134, which are contiguous with and hence regulate the amount of upward travel of the lower piston rods 136 and their guide rings 138 attached thereto.
  • the guide ring 138 on the lower piston rod 136 on whichever pressurizable cylinder 128 or 130 is holding the thread 160 or 170 for the active needle 44 or 46 is lower than the ring 138 holding up and out of the way the thread 160 or 170 for the needle in the inactive position.
  • the second needle 46 is in the inactive position and the needle holder cage 36 has been shuttled to the right by proper actuation of indexing cylinder 58 by proper means (not shown).
  • the thread 170 for the second needle 46 is caught between the tab extension 49 on the lower portion of the second needle holder 50 and the second resilient elastomeric wheel 74, thus keeping the inactive thread 170 taut and out of the way.
  • the tail of the inactive thread 170 shown in Figure 4 has been sucked into its respective vacuum tube 78, which vacuum is maintained in both tubes 78 by proper vacuum generating means (not shown).
  • the lower piston rod 136 and its guide ring 138 of the first cylinder 128 is shown in phantom in its upper position and is shown in full lines where it would be in its lower position where it guides the thread 160 for the first needle 44 shown here as being in the active position.
  • Figure 5 shows the lower piston rods 136 holding the threads 160, 170 wherein the inactive needle in this view is the first needle 44 having the tail of its thread 160 sucked into the vacuum tube 78 and the thread 160 above the eye of the first needle 44 being trapped between the tab extension 49 on the lower portion of the first needle holder 48 and the first resilient elastomeric wheel 68, thus keeping the inactive thread 160 taut and out of the way.
  • the needle holders 48, 50 are not permitted to be shuttled by activation of the indexing cylinder 58 until the active needle holder 48 or 50 is brought into heightwise alignment with the other inactive needle holder 48 or 50, whereupon the indexing cylinder 58 may be activated by the proper mechanism (not shown) to effectuate the shuttle.
  • the proper alignment occurs when the wedge-shaped extension 154 is caused to be inserted into the wedge-shaped detent 146 on the disk 144 by actuation of its pneumatic cylinder 148. This brings the rotational movement of the drive shaft 28 to a stopped position within + .5 0 of the desired angular position.
  • the drive shaft 28 in turn effectuates the positioning of the needle bar 86, permitting, through proper circuitry, the pressurization of the indexing cylinder 58 to complete the needle shuttle, and thus allows automatic stitching by the successive needle as required of the machine 20.
  • the thread control means may comprises a a thread-wiping mechanism generally designated 200.
  • the mechanism 200 is arranged on the side of the machine opposite from the machine operator, and comprises two articulated hook-shaped fingers 202 and 204 ( Figures 10 and 12).
  • a drive means for the fingers comprises a pressurizable double-acting cylinder 206, secured to the housing 22, by a bracket 207, arranged adjacent the stitching mechanism 26.
  • the drive means may comprise a solenoid arrangement,in place of the pressurizable cylinder.
  • the first articulated finger 202 is secured to the distal end of a first shaft 208 ( Figures 10), and the second articulated finger 204 is secured to the distal end of a second shaft 210 ( Figure 12).
  • the drive means also includes a piston, not shown, arranged within the cylinder 206, having a piston rod 212 extending upwardly and outwardly therefrom.
  • a first transverse bracket 214 is secured to the distal end of the rod 212.
  • the upper end of each shaft 208 and 210 is respectively secured in a bore 216 in the bracket 214.
  • the other, lower, end of each shaft 208 and 210 is slidably received in a bore 218 in a second transverse bracket 220 to which the lower end of the cylinder 206 is attached.
  • a pair of wiper plates 222 and 224 extend downwardly from the second bracket 220 immediately adjacent and generally parallel to each articulated finger 202 and 204.
  • Each wiper plate 222 and 224 has a distal edge 226 which is generally parallel to the needles 44 and 46.
  • the distal ends of the fingers 202 and 204 are biased against their respective wiper plates222 and 224, the finger 202 or 204 holding the end of the thread 160 or 170 of the now inactive needle 44 or 46 thereagainst.
  • the pressurizable cylinder 206 is serviced by a first and a second pressurizable fluid supply conduit 230 and 232 which channel pressurizable fluid from a proper regulatable pressurizable source, not shown, to the cylinder 206.
  • the thread-wiping mechanism 200 is pressurized by effecting pressurized fluid to be channelled through conduit 230 to cause the piston rod 212 to move downwardly in the cylinder 206, from its position shown in phantom lines in Figure 11 and designated "A" and "B” to the lower position shown in full line drawing therein, prior to the needles 44 and 46 shifting by actuation of the indexing mechanism 32.
  • the fingers 202 and 204 extend to a position, shown in Figure 11, wherein the lowest portion or trough of the fingers 202 and 204 are beneath the needles 44 and 46.
  • the thread from whichever needle is the "to-be- active" needle 44 or 46 is then released from between its respective resilient wheel 68 or 74 and distal portion of its respective needle holder 48 or 50 as the needles and needle holders are caused to shift with respect to the resilient wheels 68 and 74.
  • the thread 160 or' 170 from the remaining "to-be- inactive" needle 44 or 46 is secured as it passes between its respective resilient wheel 68 or 74 and its respective needle holder 48 or 50.
  • the wiper fingers 202 and 204 are then retracted by pressurized fluid entering the cylinder 206 through the conduit 232, and the end of the thread,which has been cut by known means, in the now inactive needle is pulled out of the workpiece due to its being caught by its respective returning finger 202 or 204.
  • the fingers 202 and 204 may have slightly different configurations, and they may be actuated independently by independent means such as a pair or pressurizable cylinders or the like.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP82305575A 1981-10-27 1982-10-20 Machine à coudre automatique à aiguilles multiples Expired EP0081289B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US315415 1981-10-27
US06/315,415 US4448139A (en) 1981-10-27 1981-10-27 Automatic thread changing sewing machine
US06/364,495 US4450781A (en) 1982-04-01 1982-04-01 Thread wiping mechanism
US364495 1982-04-01

Publications (2)

Publication Number Publication Date
EP0081289A1 true EP0081289A1 (fr) 1983-06-15
EP0081289B1 EP0081289B1 (fr) 1986-07-09

Family

ID=26979886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82305575A Expired EP0081289B1 (fr) 1981-10-27 1982-10-20 Machine à coudre automatique à aiguilles multiples

Country Status (4)

Country Link
EP (1) EP0081289B1 (fr)
KR (1) KR860000398B1 (fr)
DE (1) DE3271949D1 (fr)
IL (1) IL67057A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2192221A1 (fr) * 2008-11-26 2010-06-02 Nähmaschinenfabrik Emil Stutznäcker GmbH & Co. KG Machine à coudre à plusieurs aiguilles

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1445554A (fr) * 1965-02-15 1966-07-15 Gen Automated Machinery Corp Perfectionnements à la commande des machines à coudre
US3494316A (en) * 1968-12-02 1970-02-10 Singer Co Thread wiping device
US3601074A (en) * 1970-02-27 1971-08-24 Union Special Maschinenfab Thread wiper for sewing machines including a thread-separating arrangement
US3848555A (en) * 1973-12-10 1974-11-19 R Boser Sewing machine cutting device
US3901171A (en) * 1974-08-05 1975-08-26 Clinton Ind Thread wiper
US3922983A (en) * 1974-05-09 1975-12-02 Helmut Schips Device for automatic cutting of thread in sewing machines
DE2949625A1 (de) * 1979-04-12 1980-10-16 Thueringer Obertrikotagen Veb Vorrichtung zum durchschneiden des leerkettels, insbesondere an grosskranz- rundkettelmaschinen
DE2938894A1 (de) * 1979-09-26 1981-04-09 Pfaff Industriemaschinen GmbH, 6750 Kaiserlautern Stickmaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1445554A (fr) * 1965-02-15 1966-07-15 Gen Automated Machinery Corp Perfectionnements à la commande des machines à coudre
US3494316A (en) * 1968-12-02 1970-02-10 Singer Co Thread wiping device
US3601074A (en) * 1970-02-27 1971-08-24 Union Special Maschinenfab Thread wiper for sewing machines including a thread-separating arrangement
US3848555A (en) * 1973-12-10 1974-11-19 R Boser Sewing machine cutting device
US3922983A (en) * 1974-05-09 1975-12-02 Helmut Schips Device for automatic cutting of thread in sewing machines
US3901171A (en) * 1974-08-05 1975-08-26 Clinton Ind Thread wiper
DE2949625A1 (de) * 1979-04-12 1980-10-16 Thueringer Obertrikotagen Veb Vorrichtung zum durchschneiden des leerkettels, insbesondere an grosskranz- rundkettelmaschinen
DE2938894A1 (de) * 1979-09-26 1981-04-09 Pfaff Industriemaschinen GmbH, 6750 Kaiserlautern Stickmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2192221A1 (fr) * 2008-11-26 2010-06-02 Nähmaschinenfabrik Emil Stutznäcker GmbH & Co. KG Machine à coudre à plusieurs aiguilles
US8250997B2 (en) 2008-11-26 2012-08-28 Nähmaschinenfabrik Emil Stutznäcker GmbH & Co. KG Multiple needle sewing machine

Also Published As

Publication number Publication date
KR860000398B1 (ko) 1986-04-17
IL67057A0 (en) 1983-02-23
IL67057A (en) 1985-06-30
KR840002045A (ko) 1984-06-11
EP0081289B1 (fr) 1986-07-09
DE3271949D1 (en) 1986-08-14

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