WO2016129122A1 - 垂直全回転かま - Google Patents

垂直全回転かま Download PDF

Info

Publication number
WO2016129122A1
WO2016129122A1 PCT/JP2015/054038 JP2015054038W WO2016129122A1 WO 2016129122 A1 WO2016129122 A1 WO 2016129122A1 JP 2015054038 W JP2015054038 W JP 2015054038W WO 2016129122 A1 WO2016129122 A1 WO 2016129122A1
Authority
WO
WIPO (PCT)
Prior art keywords
bobbin case
hook
inner hook
peripheral wall
rotation
Prior art date
Application number
PCT/JP2015/054038
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
潤 畑中
Original Assignee
株式会社広瀬製作所
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 株式会社広瀬製作所 filed Critical 株式会社広瀬製作所
Priority to PCT/JP2015/054038 priority Critical patent/WO2016129122A1/ja
Priority to EP15881996.1A priority patent/EP3257992B1/en
Priority to KR1020177012098A priority patent/KR101962264B1/ko
Priority to JP2016574612A priority patent/JP6440746B2/ja
Priority to CN201580061246.2A priority patent/CN107109747B/zh
Publication of WO2016129122A1 publication Critical patent/WO2016129122A1/ja

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
    • D05B57/10—Shuttles
    • D05B57/14—Shuttles with rotary hooks
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/28—Applications of bobbins for storing the lower thread

Definitions

  • the present invention relates to a vertical full rotation hook provided in a sewing machine.
  • Patent Document 1 A conventional full vertical rotation hook is described in Patent Document 1, for example.
  • This prior art vertical full rotation hook is fixed to the lower shaft of the sewing machine and is detachably mounted on the outer hook having a sword tip, the inner hook held in the outer hook, and the inner hook.
  • a bobbin case and a bobbin around which a bobbin thread is wound and accommodated in the bobbin case are provided.
  • the lower shaft is driven to rotate in a predetermined rotation direction around a horizontal rotation axis, and the sewing needle is brought close to the rotation axis along the axis perpendicular to the rotation axis of the lower shaft.
  • the needle thread inserted through the sewing needle is captured by the sword tip to form a needle thread loop, and the needle thread passes over the thread while moving along the surface of the inner hook.
  • the stitches are formed on the workpiece by engaging with the lower thread drawn into the needle hole of the upper needle plate.
  • the inner hook has a substantially cylindrical peripheral wall portion, a bridge portion that extends in one diameter line direction to one end portion in the axial direction of the peripheral wall portion, and forms a bottom portion on the other end side in the axial direction of the peripheral wall portion.
  • the peripheral wall is formed with a needle drop hole through which the sewing needle is inserted, and an anti-rotation member whose base end is in contact with the inner body of the inner hook or the sewing machine so that the needle drop hole is always arranged on the axis of the sewing needle. Is prevented from rotating by following the outer hook.
  • the bobbin case includes a cylindrical peripheral wall portion that fits in the inner hook, an end wall portion that is provided so as to close an opening on one end side of the peripheral wall portion, and an end wall portion that is perpendicular to the axis of the peripheral wall portion.
  • An engagement piece also called a latch, held movably in the diameter direction, a latch spring that biases the engagement piece in one direction, and the engagement piece in the other direction against the spring force of the latch spring And an operating lever to be moved.
  • the engagement piece has a belt-like base portion and an engagement portion that extends substantially perpendicularly to one end portion in the longitudinal direction of the base portion, and the engagement piece projects the engagement portion with the engagement portion protruding from the peripheral wall portion.
  • the spring is biased in one direction by a latch spring in the protruding direction.
  • the latch spring is composed of a compression coil spring and is accommodated in a spring accommodation hole provided in the end wall portion in parallel with the longitudinal direction of the engagement piece.
  • the inner hook has a peripheral wall portion that allows the peripheral wall portion of the bobbin case to be fitted almost exactly, and a flange portion that is connected to one end portion on the open end side of the peripheral wall portion, and the peripheral wall portion and the flange portion include a peripheral wall.
  • An engaging recess is provided to engage the aforementioned engaging portion over the portion and the flange portion.
  • the lower thread is pulled out from the bobbin case with the progress of the stitches during sewing by the reciprocating displacement operation of the sewing needle and the rotation operation of the outer hook.
  • the bobbin is rotated in the bobbin case by a pulling force generated by discharging the lower thread.
  • the engaging portion of the bobbin case is engaged with the engaging recess of the inner hook so that the bobbin case is prevented from rotating about the axis of the inner hook of the bobbin case.
  • the engaging portion and the engaging recess have a clearance in the rotational direction with respect to the inner hook axis within a tolerance range of about 0.1 to 0.3 mm. For this reason, there is a problem in that the bobbin case mainly generates vibration in the rotational direction with respect to the inner hook during sewing, and thread breakage and thread balls are generated due to changes in the tension of the upper thread and the lower thread.
  • An object of the present invention is to provide a vertical full rotation rotary hook that can prevent yarn breakage and yarn ball generation.
  • the present invention is a sword tip portion that is fixed to a lower shaft that is rotationally driven around a rotation axis perpendicular to an axis of a needle bar to which a sewing needle is attached, and that has a tapered shape with a tip portion directed downstream in the rotation direction of the lower shaft.
  • a cylindrical peripheral wall portion in which a needle drop hole through which the sewing needle is inserted is formed in the outer hook, being rotatably held around the rotation axis, and a radial direction from one end portion of the peripheral wall portion A flange portion extending outward, and an inner hook provided with an engagement recess across the peripheral wall portion and the flange portion;
  • a spring member that is supported by the engagement recess and is disposed in the gap in a state where the engagement piece is engaged with the engagement recess; Including a bobbin accommodated in the bobbin case and wound with a bobbin thread.
  • the spring member is preferably a leaf spring.
  • the leaf spring includes a longitudinal plate-shaped attachment portion fixed on the upstream side in the rotational direction with respect to the engagement recess of the flange portion, and a longitudinal end of the attachment portion in the gap from the longitudinal direction. It is preferable to have a protrusion that extends and protrudes downstream in the rotation direction.
  • the spring member is provided in the engagement recess of the inner hook, in a state where the bobbin case is mounted on the inner hook, the engagement piece is spring-biased by the spring member to the downstream side in the rotation direction, and the bobbin case The vibration of the inner rotary hook is suppressed, and the occurrence of yarn breakage and yarn balls associated with changes in the tension of the upper thread and the lower thread can be prevented.
  • FIG. 2 is a cross-sectional view of the vertical full rotary hook 1 as seen from a section line II-II in FIG. It is a front view of the inner hook 3. It is a front view of the inner hook 3 to which the bobbin case 5 that houses the bobbin 4 is mounted.
  • FIG. 5 is a cross-sectional view taken along a section line VV in FIG. 3.
  • FIG. 5 is a cross-sectional view taken along the section line VI-VI in FIG. 4.
  • FIG. 4 is an enlarged cross-sectional view in the vicinity of a spring member 50. It is a side view of the inner hook 3.
  • FIG. 6 is a rear view of the inner hook 3 to which the bobbin case 5 is attached.
  • FIG. 1 is a front view showing a vertical full rotation hook 1 according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view of the vertical full rotation hook 1 as seen from the section line II-II in FIG.
  • FIG. 3 is a front view of the inner hook 3
  • FIG. 4 is a front view of the inner hook 3 to which the bobbin case 5 accommodating the bobbin 4 is mounted.
  • 5 is a cross-sectional view taken along section line VV in FIG. 3
  • FIG. 6 is a cross-sectional view taken along section line VI-VI in FIG.
  • the vertical full rotation hook 1 of the present embodiment includes an outer hook 2, an inner hook 3, a bobbin 4, and a bobbin case 5.
  • the outer hook 2 is fixed to a lower shaft 8 that is rotatably mounted in the direction of the arrow A around a rotation axis L2 perpendicular to the axis L1 of the needle bar 7 with the sewing needle 6 being detachably mounted on the same axis.
  • the outer hook 2 has a sword tip 9 that tapers toward the downstream side in the rotational direction A of the lower shaft 8 with its tip portion tapered.
  • the inner hook 3 is fitted into the outer hook 2, and a convex portion of a non-rotating member (not shown) is fitted into the concave portion 10 to prevent the inner hook 3 from rotating.
  • the inner hook 3 includes a cylindrical peripheral wall portion 12 in which a needle drop hole 11 into which the sewing needle 6 is inserted is formed, and a bottom portion 13 called a bridge that extends to the other end in the axial direction of the peripheral wall portion 12 and extends in the one-diameter line direction.
  • the stud 14 is vertically provided at the center of the bottom portion 13 toward the one end side in the axial direction of the peripheral wall portion 12 and is connected to the one end portion in the axial direction of the peripheral wall portion 12 so as to expand outward in the radial direction.
  • a rail 16 formed to protrude from the outer peripheral surface of the peripheral wall portion 12.
  • the inner hook 3 is provided with an engaging recess 28 in the peripheral wall portion and over the flange portion 15.
  • the outer hook 2 and the inner hook 3 are made of, for example, carburized and hardened carbon steel, and have a hardness of 650 HV or more by heat treatment.
  • the bobbin 4 and the bobbin case 5 are made of steel or stainless steel.
  • the above-described needle drop hole 11 is formed on the back side of the concave portion 10, that is, on one end side in the axial direction of the peripheral wall portion 12, and the above-described non-illustrated anti-rotation member defined by the concave portion 10.
  • a lower thread guide groove 35 that opens from the downstream side in the rotation direction A is formed in the fitting space in which the convex portions of the first and second projections are fitted. The lower thread guide groove 35 is inserted with the lower thread 21 drawn from between the peripheral wall portion of the bobbin case 5 and the thread tension spring 33 provided on the peripheral wall portion, and the needle hole of the needle plate provided in the sewing head.
  • a bobbin case 5 is detachably attached to the inner shuttle 3 and the bobbin 4 around which a lower thread 21 called a bobbin thread is wound is accommodated in the bobbin case 5.
  • the bobbin case 5 is formed with a first notch 22 for allowing the needle 6 to descend.
  • the first notch 22 is formed in the peripheral wall portion of the bobbin case 5 so as to extend in the axial direction, and is continuous with the second notch 23.
  • the bobbin case 5 is provided with a latch mechanism 25 that is detachably engaged with the inner hook 3.
  • a pair of protrusions 24 are provided on the inner peripheral portion 17 of the inner hook 3. These protrusions 24 are in contact with the inner surfaces of the peripheral wall portions of the bobbin case 5 facing each other through the second notch 23. As a result, when the bobbin case 5 is mounted on the inner rack 3, the insertion of the bobbin case 5 into the inner rack 3 is guided, and the angular displacement between the bobbin case 5 and the inner rack 3 together with the latch mechanism 25 is prevented. .
  • the latch mechanism 25 includes an operation lever 26 and an engagement piece 27, and the engagement piece 27 engages with an engagement recess 28 formed in the inner hook 3, whereby the corner between the inner hook 3 and the bobbin case 5.
  • the displacement is prevented, the bobbin case 5 is locked to the inner hook 3 to prevent the pulling out, and when the bobbin 4 is replaced, the locking state of the bobbin case 5 to the inner hook 3 is released, The bobbin case 5 can be detached from the inner hook 3.
  • the engagement piece 27 is engaged with an engagement portion 27 a that engages and engages with the engagement recess 28 in a state where the bobbin case 5 is mounted on the inner hook 3. It has a long plate-like base portion 27b continuous with the portion 27a, and is formed in a substantially L shape.
  • the engagement portion 27a is detachably engaged with the engagement recess 28 with a gap in the rotation direction A.
  • the flange portion 15 is provided with a spring member 50 that biases the engaging portion 27a from the upstream side in the rotational direction A toward the downstream side in the rotational direction A with the engaging portion 27a engaged with the engaging recess 28. It is done.
  • the spring member 50 is disposed in the gap.
  • FIG. 7 is an enlarged sectional view of the vicinity of the spring member 50
  • FIG. 8 is a side view of the inner hook 3
  • FIG. 9 is a side view of the inner hook 3 to which the bobbin case 5 is attached
  • 10 is a rear view of the inner hook 3
  • FIG. 11 is a rear view of the inner hook 3 to which the bobbin case 5 is attached.
  • the aforementioned spring member 50 is bent at a substantially right angle from a longitudinal plate-shaped attachment portion 51 fixed to the upstream side in the rotational direction A with respect to the engagement recess 28 of the flange portion 15 and from one end in the longitudinal direction of the attachment portion 51.
  • the spring member 50 is a leaf spring made of a spring steel plate having a thickness of about 0.15 mm, for example.
  • a mounting groove 53 extending in the direction is formed, and both the side parts 54a and 54b are caulked in a direction close to each other in a state where the mounting part 51 is fitted in the mounting groove 53, and the mounting part 51 is tightly attached by the side parts 54a and 54b. It may be fixed by caulking, which is deformed as described above.
  • the protrusion 52 is inclined toward the downstream side in the rotational direction A toward the insertion direction of the engagement portion 27a into the engagement recess 28 (rightward in FIG. 7) so that the bobbin case 5 can be easily attached to and detached from the inner hook 3.
  • the first portion 56 and the second portion 58 that inclines toward the upstream side in the rotational direction A toward the insertion direction through the peak portion 57 positioned on the most downstream side in the rotational direction A.
  • FIG. 12 is an enlarged cross-sectional view showing the vicinity of the spring member 50a of the inner hook 3 provided in the vertical full rotation hook 1a of another embodiment of the present invention
  • FIG. 13 shows the spring of the inner hook 3 to which the bobbin case 5 is attached. It is an expanded sectional view near member 50a. Note that portions corresponding to those of the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.
  • the vertical full rotation hook 1a of the present embodiment includes an outer hook 2, an inner hook 3, a bobbin 4, a bobbin case 5, and a spring member 50a.
  • the spring member 50a is connected to the mounting portion 61, the first semi-cylindrical first portion 62 that is connected to one end in the longitudinal direction of the mounting 61, the first portion 62, and the bobbin case. 5 and a second portion 63 inclined toward the upstream side in the rotational direction A toward the insertion direction (rightward in FIG. 12).
  • the spring member 50a is a leaf spring made of a spring steel plate having a thickness of about 0.15 mm, for example.
  • the attachment portion 61 is fixed to the flange portion 15 in the groove 53 by a rivet 64.
  • Such a spring member 50a presses the engaging portion 27a toward the downstream side in the rotational direction A by the second portion 63 and also presses the bobbin case 5 in the insertion direction.
  • the rattling and vibration can be suppressed, and the shakiness and vibration in the direction of the axis L2 can also be suppressed. This can more reliably prevent yarn breakage and yarn ball generation.
  • FIG. 14 is an enlarged cross-sectional view of the vicinity of the spring member 50b of the inner hook 3 provided in the vertical full rotation hook 1b according to still another embodiment of the present invention
  • FIG. 15 shows the spring of the inner hook 3 to which the bobbin case 5 is attached. It is an expanded sectional view near member 50b. Note that portions corresponding to those of the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.
  • the vertical full rotation hook 1b of this embodiment includes an outer hook 2, an inner hook 3b, a bobbin 4, a bobbin case 5, and a spring member 50b.
  • the spring member 50b is bent and connected to the attachment portion 71 at an angle larger than that of the attachment portion 71 in the longitudinal direction of the attachment portion 71, and extends into the engagement recess 28. It has a portion 72 and a projection 73 that is connected to the first portion 72 and protrudes in a convex manner toward the downstream side in the rotational direction A near the end of the bobbin case 5 on the downstream side in the insertion direction.
  • the spring member 50b is a leaf spring made of a spring steel plate having a thickness of about 0.15 mm, for example.
  • the attachment portion 71 is fixed to the flange portion 15 with a rivet 74.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
PCT/JP2015/054038 2015-02-13 2015-02-13 垂直全回転かま WO2016129122A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/JP2015/054038 WO2016129122A1 (ja) 2015-02-13 2015-02-13 垂直全回転かま
EP15881996.1A EP3257992B1 (en) 2015-02-13 2015-02-13 Vertical full rotation shuttle
KR1020177012098A KR101962264B1 (ko) 2015-02-13 2015-02-13 수직 전회전 북집
JP2016574612A JP6440746B2 (ja) 2015-02-13 2015-02-13 垂直全回転かま
CN201580061246.2A CN107109747B (zh) 2015-02-13 2015-02-13 垂直全旋转梭

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/054038 WO2016129122A1 (ja) 2015-02-13 2015-02-13 垂直全回転かま

Publications (1)

Publication Number Publication Date
WO2016129122A1 true WO2016129122A1 (ja) 2016-08-18

Family

ID=56614282

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/054038 WO2016129122A1 (ja) 2015-02-13 2015-02-13 垂直全回転かま

Country Status (5)

Country Link
EP (1) EP3257992B1 (ko)
JP (1) JP6440746B2 (ko)
KR (1) KR101962264B1 (ko)
CN (1) CN107109747B (ko)
WO (1) WO2016129122A1 (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7369439B2 (ja) 2019-10-16 2023-10-26 株式会社 神崎高級工機製作所 減速逆転機
JP7369438B2 (ja) 2019-10-02 2023-10-26 株式会社 神崎高級工機製作所 減速逆転機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58152277U (ja) * 1982-04-01 1983-10-12 株式会社廣瀬製作所 ミシンの全回転かま
JPS6141674U (ja) * 1984-08-23 1986-03-17 ジャガー株式会社 ミシンの全回転釜

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6314375Y2 (ko) * 1981-01-12 1988-04-22
JPS6114375U (ja) 1984-06-29 1986-01-28 追浜工業株式会社 エンジン回転計
JPH0268096A (ja) * 1988-09-01 1990-03-07 Hirose Mfg Co Ltd 本縫いミシンの全回転かま
JP2972965B2 (ja) * 1991-03-31 1999-11-08 ブラザー工業 株式会社 ミシンの全回転かま
JPH0642626Y2 (ja) * 1991-11-05 1994-11-09 株式会社廣瀬製作所 垂直全回転かま
CN1110590C (zh) * 1997-01-29 2003-06-04 株式会社广濑制作所 缝纫机的梭板
JP2824246B2 (ja) * 1997-02-07 1998-11-11 株式会社廣瀬製作所 ミシンのかま
JP4176991B2 (ja) * 1999-05-28 2008-11-05 三菱電機株式会社 全回転かま
JP5197197B2 (ja) * 2008-07-04 2013-05-15 Ｊｕｋｉ株式会社 ミシンのボビンケース
ITMI20130324A1 (it) * 2013-03-04 2014-09-05 Cm Cerliani S R L Crochet rotativo con capsula per macchina per cucire a punto annodato comprendente mezzi per ridurre i giochi tra capsula e cestello e ridurne la rumorosita'

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58152277U (ja) * 1982-04-01 1983-10-12 株式会社廣瀬製作所 ミシンの全回転かま
JPS6141674U (ja) * 1984-08-23 1986-03-17 ジャガー株式会社 ミシンの全回転釜

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3257992A4 *

Also Published As

Publication number Publication date
KR20170065627A (ko) 2017-06-13
EP3257992A1 (en) 2017-12-20
CN107109747B (zh) 2019-08-13
EP3257992A4 (en) 2018-07-04
CN107109747A (zh) 2017-08-29
JP6440746B2 (ja) 2018-12-19
JPWO2016129122A1 (ja) 2017-11-30
EP3257992B1 (en) 2023-04-05
KR101962264B1 (ko) 2019-03-26

Similar Documents

Publication Publication Date Title
JP6440746B2 (ja) 垂直全回転かま
JP6920789B2 (ja) 複数の部品からなるスライドを有するボビンケースを備えた本縫いミシン用フック
US6745712B1 (en) Fully rotatable shuttle
JP4953376B2 (ja) テンプル装置
US11591725B2 (en) Crank-type drive device for loom
JP6441084B2 (ja) ミシン
WO2016157488A1 (ja) 垂直全回転かま
JP4083890B2 (ja) ミシンの針棒
US10156034B1 (en) High velocity bobbin sewing system
JP6027632B2 (ja) 垂直全回転かま
JP6395864B2 (ja) 垂直全回転かま
TWI839930B (zh) 釣魚用紡車式捲線器
JP2005261847A (ja) ミシンのかまおよび外かま
JP4700361B2 (ja) カルコ
US744747A (en) Attachment for raceways for sewing-machine shuttles.
JP2588173Y2 (ja) 織機の耳糸ボビンホルダ装置
JP2005348771A (ja) ミシン
JP5197191B2 (ja) ミシンのオープナー機構
JP3490956B2 (ja) ミシンの垂直全回転かま
JP2588172Y2 (ja) 織機の耳糸ボビンホルダ装置
WO2016088208A1 (ja) 垂直全回転かま
JP2007097491A (ja) 魚釣用スピニングリール
JP2006326150A (ja) ミシンの糸通し装置
WO2014199435A1 (ja) 針寄せ位置調整装置および水平全回転かま
JP2012100934A (ja) シリンダ保持具

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15881996

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016574612

Country of ref document: JP

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 20177012098

Country of ref document: KR

Kind code of ref document: A

REEP Request for entry into the european phase

Ref document number: 2015881996

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE