EP1367168A1 - Doppelnadelnähmaschine zum Formen einer eckigen Naht an einem Stoff - Google Patents

Doppelnadelnähmaschine zum Formen einer eckigen Naht an einem Stoff Download PDF

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Publication number
EP1367168A1
EP1367168A1 EP03009182A EP03009182A EP1367168A1 EP 1367168 A1 EP1367168 A1 EP 1367168A1 EP 03009182 A EP03009182 A EP 03009182A EP 03009182 A EP03009182 A EP 03009182A EP 1367168 A1 EP1367168 A1 EP 1367168A1
Authority
EP
European Patent Office
Prior art keywords
looper
fabric
needle
thread loop
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.)
Granted
Application number
EP03009182A
Other languages
English (en)
French (fr)
Other versions
EP1367168B1 (de
Inventor
Fumio Pegasus Sewing Machine Mfg. Co. Ltd. Toume
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.)
Pegasus Co Ltd
Original Assignee
Pegasus Sewing Machine Manufacturing Co Ltd
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 Pegasus Sewing Machine Manufacturing Co Ltd filed Critical Pegasus Sewing Machine Manufacturing Co Ltd
Publication of EP1367168A1 publication Critical patent/EP1367168A1/de
Application granted granted Critical
Publication of EP1367168B1 publication Critical patent/EP1367168B1/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
    • D05B61/00—Loop holders; Loop spreaders; Stitch-forming fingers
    • 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

  • the present invention relates to a double needle sewing machine for forming an angled stitching in fabric, which the fabric is turned at the time of pause of sewing by these needles and looper, and an angled stitching is formed in the turned fabric by resuming the sewing operation, and in particular a decorative double chain stitch is formed at the back side of the fabric.
  • a double needle sewing machine for forming an angled stitching in fabric as disclosed in Japanese Laid-open Patent No. 63-186688 has been known.
  • the known double needle sewing machine comprises right and left needles and a looper.
  • the needles are threaded respectively, and penetrate through a needle plate.
  • the looper moves back and forth from the right side along the needle penetration points of the needle plate so as to capture each thread loop formed behind the needles.
  • the sewing operator turns the fabric at the time of pause of sewing by the needles and looper, and resumes the sewing operation after turning of the fabric, so that an angled stitching is formed in the fabric.
  • This sewing machine is intended to form decorative stitches on the face and back side of the fabric, and a double chain stitch can be formed if upper covered thread is not used.
  • the present invention is devised in the light of the above background, and it is an object thereof to present a double needle sewing machine for forming an angled stitching in fabric capable of obtaining a sewn product of excellent appearance by forming an angled stitching without appearing a passing thread on the upper surface of the stitching angle portion of the fabric.
  • the double needle sewing machine for forming an angled stitching in fabric as set forth in claim 1 of the present invention comprises right and left needles and a looper.
  • the right and left needles are threaded respectively, and penetrate through the needle plate.
  • the looper moves back and forth from the right side along the needle penetration points of the needle plate, and captures each thread loop formed behind the needles.
  • the fabric is turned, and an angled stitching is formed in the fabric when resuming the sewing operation after turning of the fabric.
  • This sewing machine further comprises an air blower and a hook.
  • the air blower blows air to the thread loop formed in the rear portion when the needle ascends, and moves the thread loop away from the trajectory of the looper.
  • the hook is disposed so as to be movable toward and away from the looper, and slides the thread loop captured by the looper to the base side of the looper.
  • the air blower is operated continuously at the timing of first several stitches immediately before turning of the fabric and second several stitches immediately after turning of the fabric, and air is blown to the thread loop formed behind the right needle from its blowing position. As a result, the thread loop at the right needle side is moved away from the trajectory of the looper.
  • the hook is moved forward to the looper side at the timing of said first several stitches so as to slide at least the thread loop of the left needle captured by the looper to the base side of the looper, and the thread loop of the left needle is captured by the right needle, and then the air blower is operated at the timing of second several stitches so as to blow air to the thread loop formed behind the left needle from its blowing position.
  • the thread loop at the left needle side is captured by the right needle and the thread loop of the left needle side is moved away from the trajectory of the looper.
  • the thread loop at the right needle side when turning the fabric clockwise, from first several stitches immediately before turning of the fabric to second several stitches immediately after turning of the fabric, the thread loop at the right needle side is moved away from the trajectory of the looper, and a double chain stitch is formed in the fabric only at the left needle side.
  • the thread loop at the left needle side is captured by the right needle, and the thread loop at the left needle side is moved away from the trajectory of the looper, and a double chain stitch is formed in the fabric only at the right needle side.
  • a stitching is formed at the left needle side or right needle side only depending on the turning direction of the fabric, and by turning the fabric about the base of the stitching, visible passing thread is not formed on the upper surface of the stitching angle portion formed on the fabric whether the fabric turning direction is clockwise or counterclockwise, so that the appearance of the sewn product may be enhanced.
  • the air blower is disposed slidably right and left, and its blowing position is changeable depending on the turning direction of the fabric by such sliding motion, and therefore it is not required to install the air blower at each position corresponding to the turning direction of the fabric, and the number of parts disposed in the sewing machine is decreased and the cost is lowered.
  • the hook and air blower by disposing the hook and air blower so as to be movable back and forth and changeable in position by way of a pneumatic cylinder, the hook and blower can be moved flexibly as required, and angled stitching operation can be executed efficiently.
  • Fig. 1 is an essential perspective view showing a double needle sewing machine for forming an angled stitching in fabric according to the present invention.
  • a cylinder bed 1 of this sewing machine comprises a feed dog 2, a looper 3, and a needle plate 5.
  • the feed dog 2 moves in four directions to feed the fabric in the direction of arrow F, and the looper 3 oscillates in a direction intersecting with the fabric feed direction F.
  • the needle plate 5 (see Fig. 2) is fixed at screw holes 4.
  • the needles 6, 7 extend downward, and their leading ends penetrate the needle plate 5 by the vertical motion of the needle bar 9. Needle penetration points 5a, 5a of the needle plate 5 are formed at the base side of a tongue 5b extended in the fabric feed direction F as shown in Fig. 2.
  • the looper 3 is mounted on a looper shaft 11 by way of a looper stand 10, and the looper shaft 11 moves back and forth from the right side in cooperation with the rotation of the main shaft (not shown).
  • the forward and backward moving direction of the looper shaft 11 runs along the needle penetration points 5a, 5a of the needle plate 5, and the looper 3 moves back and forth laterally beneath the needle plate 5.
  • the looper 3 moves forward from the right side as shown in Fig. 1, the leading ends of the needles 6, 7 are elevated higher than the needle penetration points 5a, 5a of the needle plate 5.
  • thread holes 6a, 7a are provided for passing the needle threads 12, 13 as shown in Fig. 3 through Fig. 7, and an eyelet 3a for passing a looper thread 14 is provided at the leading end of the looper 3.
  • a hook 15 is provided for sliding the thread loop captured by the looper 3.
  • the hook 15 is slidably supported laterally in a groove 1a formed in the cylinder bed 1.
  • a protrusion 15a is formed at the base side of the hook 15, and the protrusion 15a is engaged with a bifurcate portion 16a formed at one end of a bell-crank lever 16.
  • the bell-crank lever 16 is rotatably fixed to the cylinder bed 1 by way of a stepped screw 17.
  • a pneumatic cylinder 18 is disposed at the leading end of the cylinder bed 1.
  • An operating piece 19 is fitted to a piston rod 18a of the pneumatic cylinder 18.
  • the operating piece 19 is coupled to a slot 16b of the bell-crank lever 16 by way of a stepped screw 20.
  • the mounting position of the operating piece 19 to the piston rod 18a can be adjusted by means of a nut 21.
  • the pneumatic cylinder 18 is connected to a high pressure air source (not shown) by way of a pipe 22.
  • An air blower 23 is disposed behind the cylinder bed 1.
  • the leading end portion of the air blower 23 proceeds into the inside of the cylinder bed 1 through a groove hole 1b, and the leading end blowing position is directed toward the looper 3 side so that air may be blown to the thread loop formed behind the needle at the time of ascending.
  • the air blower 23 is attached to a bracket 24 fixed to a piston rod (not shown) of the pen type pneumatic cylinder.
  • a slit type oil shield (not shown) is provided in the groove hole 1b so that the lubricating oil supplied in the cylinder bed 1 may not leak out.
  • a stitching (first stitching) S1 related to the stitch type 406 is formed by the needle threads 12, 13 and looper thread 14 threaded the needle holes 6a, 7a of the needles 6, 7 and the eyelet 3a of the looper 3, respectively.
  • the blowing position of the air blower 23 is changed to the right needle 7 side by sliding.
  • the thread loop formed behind the right needle 7 in ascending motion is moved away from the trajectory of the looper 3.
  • the looper 3 advances from the right side along the direction of arrow x in this state, as shown in Fig. 5, the thread loop formed behind the right needle 7 is not captured by the looper 3, but only the thread loop 12L formed behind the left needle 6 is captured.
  • the left needle 6 proceeds into a triangle formed by the looper 3 retreating to the left as indicated by arrow y, the looper thread 14 from the eyelet 3a of the looper 3 to the fabric W, and the thread loop 12L of the left needle captured by the looper 3.
  • the looper thread 14a of said triangle is captured by the left needle 6 as shown in Fig. 6.
  • the right needle 7 merely penetrates through the fabric W.
  • a stitching (several stitches) Sa related to stitch type 401 is formed in the fabric W by the needle thread 12 threaded the thread hole 6a of the left needle 6 and the looper thread 14 threaded the eyelet 3a of the looper 3.
  • the fabric W is turned clockwise by a specified angle from the base end SS of the stitching (see Fig. 9). After this turning, the fabric W is pressed to the needle plate 2 by the presser foot (not shown), and sewing operation by the sewing machine is resumed.
  • a stitching Sa related to stitch type 401 is formed in the fabric W consecutively to the base end SS of the first stitching. Then, stopping the air blow by the air blower 23, as shown in Fig. 10, a stitching (second stitching) S2 related to the same stitch type 406 is formed in succession, and therefore only the outside is left over as sewing line (stitches Sa, Sa related to stitch type 401) on the upper surface of the stitching angle portion, and passing thread is not formed.
  • the hook 15 is operated when the looper 3 moves forth in several stitches immediately before turning of the fabric.
  • the thread loops 12L, 13L captured by the looper 3 are moved to slide to the base end side of the looper 3 as shown in Fig. 11.
  • the looper 3 retreats to the right, the left needle 6 descending after passing the upper dead center proceeds into a triangle formed by the looper 3, the looper thread 14 from the eyelet 3a of the looper 3 to the fabric W, and the thread loop 12L of the left needle captured by the looper 3.
  • the right needle 7 captures said thread loop 12L, and proceeds into a triangle formed by the looper 3, the looper thread 14 from the eyelet 3a of the looper 3 to the fabric W, and the thread loop 13L of the right needle 7 captured by the looper 3.
  • the looper thread 12L of the left needle 6 captured by the right needle 7 is released from the looper 3 moving backward when the needles 6, 7 descend, and the thread loop 12LL of the left needle 6 released from the looper 3 is lifted to the fabric W side while being captured by the right needle 7 as shown in Fig. 12.
  • a stitching (several stitches) Sa related to stitch type 401 is formed in the fabric W by the needle thread 13 threaded the thread hole 7a of the right needle 7 and the looper thread 14 threaded the eyelet 3a of the looper 3.
  • the fabric W After stopping the driving of the sewing machine at arriving the needles 6,7 in the upper dead center ( see Fig. 16), the fabric W is turned counterclockwise by a specified angle from the base end SS of the stitching (see Fig. 17). After this turning, the fabric W is pressed to the needle plate 2 by the presser foot (not shown), and sewing operation by the sewing machine is resumed. For several stitches immediately after resuming the sewing operation, the operation of the air blower 23 continues, and a stitching Sa related to stitch type 401 is formed in the fabric W consecutively to the base end SS of the first stitching. Then, stopping the air blow by the air blower 23, as shown in Fig. 18, a stitching (second stitching) related to the same stitch type 406 is formed in succession. Therefore only the outside is left over as sewing line (stitching Sa, Sa related to stitch type 401) on the upper surface of the stitching angle portion, and passing thread is not formed.
  • the thread loops 12, 13L are moved by the hook 15 to slide to the base end side of the looper 3, but not limited to this operation, for example, only the thread loop 12L of the left needle may be moved to slide so that the thread loop 12L of the left needle may be captured by the descending right needle 7.
  • the fabric turning angle is 90°, but not limited to this angle, the fabric can be turned at any arbitrary angle.
  • the blowing position of the air blower is changed by the pen type pneumatic cylinder, but not limited to this operation, for example, the blowing position may be changed by foot pedal, knee switch or hand-operated parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Treatment Of Fiber Materials (AREA)
EP03009182A 2002-05-14 2003-04-22 Doppelnadelnähmaschine zum Formen einer eckigen Naht an einem Stoff Expired - Lifetime EP1367168B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002138586 2002-05-14
JP2002138586A JP3845335B2 (ja) 2002-05-14 2002-05-14 角縫い用の２本針ミシン

Publications (2)

Publication Number Publication Date
EP1367168A1 true EP1367168A1 (de) 2003-12-03
EP1367168B1 EP1367168B1 (de) 2005-08-17

Family

ID=29416868

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03009182A Expired - Lifetime EP1367168B1 (de) 2002-05-14 2003-04-22 Doppelnadelnähmaschine zum Formen einer eckigen Naht an einem Stoff

Country Status (5)

Country Link
EP (1) EP1367168B1 (de)
JP (1) JP3845335B2 (de)
CN (1) CN100480453C (de)
AT (1) ATE302299T1 (de)
TW (1) TW576442U (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5941271B2 (ja) * 2011-11-24 2016-06-29 ペガサスミシン製造株式会社 擬似二重環縫い目構造と、該縫い目を形成する多本針ミシン
CN103590201A (zh) * 2012-08-13 2014-02-19 顾飞龙 包缝针车起缝不留残线头的方法
CN103911774A (zh) * 2013-01-06 2014-07-09 顾飞龙 缝纫机的车缝线转折的车缝方法
JP2016202723A (ja) * 2015-04-27 2016-12-08 Juki株式会社 ミシン
CN107723945A (zh) * 2017-10-18 2018-02-23 杰克缝纫机股份有限公司 一种双针机拐角缝制控制方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019048A1 (de) * 1979-05-16 1980-11-26 Dürkoppwerke Gmbh Ziernaht-Nähmaschine
JPS63186688A (ja) * 1987-01-29 1988-08-02 ペガサスミシン製造株式会社 偏平縫いミシンの縫製方法及び偏平縫いミシン
EP0512145A1 (de) * 1991-05-10 1992-11-11 Dürkopp Adler Aktiengesellschaft Verfahren zum Herstellen einer im Nahtverlauf die Richtung ändernden Naht
JPH11276752A (ja) * 1998-03-29 1999-10-12 Brother Ind Ltd ミシン

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6253698A (ja) * 1985-09-03 1987-03-09 三菱電機株式会社 ２本針縫製装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019048A1 (de) * 1979-05-16 1980-11-26 Dürkoppwerke Gmbh Ziernaht-Nähmaschine
JPS63186688A (ja) * 1987-01-29 1988-08-02 ペガサスミシン製造株式会社 偏平縫いミシンの縫製方法及び偏平縫いミシン
EP0512145A1 (de) * 1991-05-10 1992-11-11 Dürkopp Adler Aktiengesellschaft Verfahren zum Herstellen einer im Nahtverlauf die Richtung ändernden Naht
JPH11276752A (ja) * 1998-03-29 1999-10-12 Brother Ind Ltd ミシン

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 01 31 January 2000 (2000-01-31) *

Also Published As

Publication number Publication date
EP1367168B1 (de) 2005-08-17
CN100480453C (zh) 2009-04-22
JP3845335B2 (ja) 2006-11-15
TW576442U (en) 2004-02-11
ATE302299T1 (de) 2005-09-15
JP2003326004A (ja) 2003-11-18
CN1458313A (zh) 2003-11-26

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