EP1052322A2 - Dispositif d'actionnement d'un boucleur oscillant d'une machine à coudre - Google Patents

Dispositif d'actionnement d'un boucleur oscillant d'une machine à coudre Download PDF

Info

Publication number: EP1052322A2
Authority: EP; European Patent Office
Prior art keywords: drive device; pinion; drive; rack; gripper
Prior art date: 1999-05-07
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

EP00810086A

Other languages

German (de)

English (en)

Other versions

EP1052322A3 (fr

EP1052322B1 (fr

Inventor

Christian Anderegg

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.)

Fritz Gegauf AG

Original Assignee

Fritz Gegauf AG

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.)

1999-05-07

Filing date

2000-01-31

Publication date

2000-11-15

2000-01-31 Application filed by Fritz Gegauf AG filed Critical Fritz Gegauf AG

2000-11-15 Publication of EP1052322A2 publication Critical patent/EP1052322A2/fr

2001-10-04 Publication of EP1052322A3 publication Critical patent/EP1052322A3/fr

2003-05-28 Application granted granted Critical

2003-05-28 Publication of EP1052322B1 publication Critical patent/EP1052322B1/fr

2020-01-31 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

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Classifications

- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/30—Driving-gear for loop takers

Definitions

the invention relates to a drive device for an oscillating hook of a sewing machine Preamble of claim 1.
the rack is in the Swiss patent specification 241880 in a longitudinal guide tangential to the gear and is from a crank rod attached to a crank driven.
the teeth of the rack are directly on one Extension of the crank rod is formed. The latter will from a rocker arm to an oscillating motion transferred.
Both drive devices can both horizontally and vertically oscillating grippers be used.
Deflection of the needle is due to the deviation of the phase position between the eye of the needle and gripper tip influenced or limited.
the Effects of this phase shift are described in the manual by Renters "The Sewing Machine Expert", Volume 3, 1957, described and illustrated.
the conditions of the loop takeover when zigzag sewing is therefore waived. To sum up clearly that by little or ideally none at all Deviations from the conditions, such as when sewing there is a straight seam, a larger zigzag width would be achievable.
the eccentric arrangement of the Drive gear on the gripper driver shaft, the Speed of the gripper tip when capturing the of the needle thread presented to the needle increase.
the angular position of the largest eccentricity of the Gear with respect to the gripper tip will be like this chosen that the gripper tip in Loop detection area or time with the maximum speed is moved past the needle.
the one sitting eccentrically on the gripper driver shaft Sprockets can be manufactured inexpensively.
the rack on the gear can be coaxial to the eccentrically arranged gear a guide disc are provided, which by an adjacent Guide means the lifting of the rack from the teeth prevented.
a crank rod is formed by spring force in Engage with the teeth of the gear can be kept.
the Invention can be arranged by arranging the teeth of the rack on a curved line the speed curve of the Gripper tip continues to grip the thread loop be optimized.
Advantageous in terms of noise turns out to be the use of a timing belt as an exaggeration.
a sewing machine 1 is shown schematically in FIG Side view shown and it's in there Machine housing 3, to which the free arm 5 and above the head 7 with the presser foot and not shown Needle bar holders are attached, visible.
the laterally cut free arm 5 is open the left side a crank drive 11 with one on it articulated crank rod 13 and at its front end a rack 15 visible.
the rack 15 meshes with a gear or pinion 17, which is eccentric the drive shaft 19 for the gripper 21 is placed.
the needle plate 23 is visible above the gripper 21 whose tap hole 25, the needle 9 can be passed.
the Crank drive 11 is by a not shown Motor started to rotate.
the crank drive is synchronous with the drive for the needle bar, not shown, and whose attached needle 9 is formed.
Figure 1 is the crank drive 13 with it attached rack 15 in the rear position and the needle 9 is not in engagement with the sewing material (sewing material not shown).
Figure 2 the needle 9 is through Stitch hole 25 immersed in the throat plate 23 and the Rack 15 has its extreme front and reverse position reached. In the front extreme position are those Teeth of the pinion 17 with the teeth of the rack 15 engaged, which is the smallest distance to the axis A of the Have drive shaft 19.
the teeth 27 of the rack 15 within one loop-shaped recess 29 at the end of the crank rod 13.
the area of the teeth 27 opposite Crank rod end faces one essentially parallel the slit-shaped opening 31 running through the tooth back.
a sliding block designed to move longitudinally 33 used and is from a hold-down 35 to the lower boundary surface 37 of the slit-shaped opening 31 pressed.
the hold-down 35 preferably comprises two parallel leg, the side of the slit-shaped opening 31 come to rest and this cover on the side.
the hold-down 35 is at one end a pivot axis 39 and is articulated by a spring 41 pressed clockwise on the sliding block 33.
the Force of the spring 41 is such that it is sufficient, the teeth 27 of the rack 15 safely at all times to keep in engagement with the teeth of the pinion 17.
the periphery 47 as Guide surface acts.
Disk 45 is preferably 45 made in one piece with the pinion 17 and sits with same eccentricity on the drive shaft 19 of the Grab driver 22. This ensures that the distance of the tooth flanks, which engage with the rack 15 and the line of contact between the periphery 47 the disc 45 with the guide surface 43 at the end 14 of the Crank rod 13 always remains constant.
crank rod 13 with the rack 15 is preferred produced as a fine-cut stamped part and can therefore be very precise and also extremely inexpensive to manufacture.
the position of the rack is a toothed belt 61, which on the one hand the eccentrically mounted pinion 17 and on the other hand, one rotatably mounted on an axis 75
Output gear 63 wraps around the crank rod 13 is driven to oscillate.
One by a spring 69 loaded belt tensioning lever 65 with a tensioning pulley 67 resembles that due to the eccentricity of the pinion 17 caused changes in the loop length of the Timing belt 61 out.
the changes in Wrapping lengths are very small because of that too Eccentricity of the pinion 17 is extremely low.
the gear 63 can also be used be mounted eccentrically on an axis 77.
the gear 63 could also be segment-like Belt carriers are used because the toothed belt 61 only a very limited oscillating stroke anyway executes.
FIG 4 the location of the Needle 9 in the three possible puncture positions of the gripper 21 or the gripper tip 53 is shown.
Position a is the position of the needle 9 and the hook 21 can be seen at the "right" puncture.
the position b shows the position of the gripper 21 and needle 9 at Center stitch, as used for straight seams, and in position c the needle 9 and the gripper 21 are in the puncture position "left” can be seen.
This Illustration shows that the distance B between the needle eye 51 and the hook tip 53 in dependence is different in size from the lateral position of the needle 9 (different phase position).

Landscapes

Engineering & Computer Science (AREA)
Textile Engineering (AREA)
Sewing Machines And Sewing (AREA)
Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

EP00810086A 1999-05-07 2000-01-31 Dispositif d'actionnement d'un boucleur oscillant d'une machine à coudre Expired - Lifetime EP1052322B1 (fr)

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
CH85999		1999-05-07
CH85999		1999-05-07
CH227299		1999-12-10
CH227299		1999-12-10

Publications (3)

Publication Number	Publication Date
EP1052322A2 true EP1052322A2 (fr)	2000-11-15
EP1052322A3 EP1052322A3 (fr)	2001-10-04
EP1052322B1 EP1052322B1 (fr)	2003-05-28

Family

ID=25685917

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP00810086A Expired - Lifetime EP1052322B1 (fr)	1999-05-07	2000-01-31	Dispositif d'actionnement d'un boucleur oscillant d'une machine à coudre

Country Status (6)

Country	Link
US (1)	US6182589B1 (fr)
EP (1)	EP1052322B1 (fr)
JP (1)	JP4381561B2 (fr)
CN (1)	CN1096518C (fr)
DE (1)	DE50002325D1 (fr)
TW (1)	TW573694U (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US6269760B1 (en) *	1999-10-08	2001-08-07	Robert A. Moore	Wide needle swing oscillating hook system for sewing machines
CN105624928B (zh) *	2016-03-30	2019-05-21	王雪松	便携式缝纫机

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1613605A (en) *	1924-03-26	1927-01-11	Singer Mfg Co	Looper mechanism for sewing machines
US2325467A (en) *	1940-05-24	1943-07-27	Beyer Werner Kurt Rudolf	Sewing machine
US3029762A (en) *	1960-09-23	1962-04-17	Singer Mfg Co	Shuttle mechanism for sewing machines
US3954070A (en) *	1975-05-28	1976-05-04	The Singer Company	Adjustable loop taker support for sewing machines
DE2938802A1 (de) *	1979-09-25	1981-04-02	The Singer Co., 06904 Stamford, Conn.	Naehmaschine
US5396853A (en) *	1994-03-04	1995-03-14	Huang; Dennis	Double-thread hand sewing machine transmission mechanism
US6032597A (en) *	1997-09-30	2000-03-07	Brother Kogyo Kabushiki Kaisha	Shuttle hook driver for sewing machine

2000
- 2000-01-31 DE DE50002325T patent/DE50002325D1/de not_active Expired - Lifetime
- 2000-01-31 EP EP00810086A patent/EP1052322B1/fr not_active Expired - Lifetime
- 2000-03-15 TW TW92214580U patent/TW573694U/zh not_active IP Right Cessation
- 2000-04-03 US US09/541,181 patent/US6182589B1/en not_active Expired - Fee Related
- 2000-04-30 CN CN00108241A patent/CN1096518C/zh not_active Expired - Fee Related
- 2000-05-01 JP JP2000132332A patent/JP4381561B2/ja not_active Expired - Lifetime

Also Published As

Publication number	Publication date
US6182589B1 (en)	2001-02-06
JP2000342875A (ja)	2000-12-12
CN1273296A (zh)	2000-11-15
EP1052322A3 (fr)	2001-10-04
CN1096518C (zh)	2002-12-18
DE50002325D1 (de)	2003-07-03
EP1052322B1 (fr)	2003-05-28
TW573694U (en)	2004-01-21
JP4381561B2 (ja)	2009-12-09

Legal Events

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