EP1491670A2 - Motorisch angetriebene Vorrichtung zum Öffnen eines Greifers - Google Patents

Motorisch angetriebene Vorrichtung zum Öffnen eines Greifers Download PDF

Info

Publication number: EP1491670A2
Authority: EP; European Patent Office
Prior art keywords: gripper; slider; opening device; opening; motor
Prior art date: 2003-06-26
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

EP04100265A

Other languages

English (en)

French (fr)

Other versions

EP1491670A3 (de

EP1491670B1 (de

Inventor

Angelo Gallizioli

Dario Magoni

Corrado Volpi

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.)

Promatech SpA

Original Assignee

Promatech SpA

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.)

2003-06-26

Filing date

2004-01-26

Publication date

2004-12-29

2004-01-26 Application filed by Promatech SpA filed Critical Promatech SpA

2004-12-29 Publication of EP1491670A2 publication Critical patent/EP1491670A2/de

2005-05-11 Publication of EP1491670A3 publication Critical patent/EP1491670A3/de

2009-11-11 Application granted granted Critical

2009-11-11 Publication of EP1491670B1 publication Critical patent/EP1491670B1/de

2024-01-26 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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Classifications

- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
- D03D47/20—Constructional features of the thread-engaging device on the inserters

Definitions

the present invention relates to a gripper-opening device for weaving looms, in particular to a motor-driven gripper opening device.
the drawing gripper is opened, in a manner known per se, by means of a gripper-opening device, substantially consisting of a cam device or other reference device engaging with a corresponding element of the gripper during its travel, causing the opening of the gripping system.
a gripper-opening device substantially consisting of a cam device or other reference device engaging with a corresponding element of the gripper during its travel, causing the opening of the gripping system.
a motor-driven gripper-opening device allows to flexibly adjust the opening time and position of the drawing gripper, without having to manually modify the mounting position of the gripper-opening system.
Such a device is disclosed, for example, in W097/40218.
a gripper-opening device is disclosed in the form of a shaped slider, which is capable of being shifted backwards and forwards, in the gripper movement direction, by means of an electric motor.
the rotary control of the driving shaft is transformed in a reciprocating rectilinear movement by means of a kinematic mechanism mode of interconnected small rods.
This system is space-consuming in a direction perpendicular to the weaving plane, due to the presence of the rod-and-crank kinematic mechanism, which extends below the weaving plane by a substantial measure.
the kinematic mechanism using rods is necessarily exposed to the outer environment which, as known, is dusty and full of threads, especially in the area of the loom where the gripper is moved back to upon thread insertion, which tends to affect the mechanism resulting in an increased risk of jamming or malfunctioning.
this solution relies on a labile and rather complex kinematic mechanism, and is therefore intended to operate in substantially stationary conditions, for example upon changing the weft thread.
the entire travel of the gripper-opening slider is accomplished by a very small rotation (certainly smaller than 90°) of the driving shaft, which goes to the detriment of control accuracy.
this mechanism is not considered suitable, also because it was observed that there is a need to vary the condition of the gripper opening device precisely and dynamically.
a conflict relating to the adjustment of the intervention time exists between the steady running mode and the slow running condition; in steady running mode, as a matter of fact, the elastic deformations of the gripper control, due to inertia forces, cause an anticipation in the opening of the gripper compared with what happens in the slow running condition: since adjustment is optimised for the steady running condition (to minimise weft misinsertions), in the slow running condition an anticipated opening of the gripper occurs which may lead to defects in the fabric.
fig. 1 is a perspective bottom view of the rear side of the gripper-opening device according to the invention.
fig. 2 is a view as shown in fig. 1 with the support bracket missing;
fig. 3 is a view as shown in fig. 2 with a further transmission component missing;
fig. 4 is a front elevation view of the device shown in fig. 1;
fig. 5 is an elevation rear view of the device shown in fig. 1;
fig. 6 is a plan bottom view of the device shown in fig. 5;
fig. 7 is a top plan view of the device shown in fig. 5.
a support rail (not shown) is provided to guide a drawing gripper (not shown) and to support a respective gripper-opening device 1.
This latter device consists of, in a manner known per se, a sliding bracket 2 supporting and guiding an adjusting slider 3.
the slider has a shaped edge capable of, according to a substantially known method, progressively engaging with a gripper-opening lever causing the opening of the gripping elements and the release of the weft thread.
the slider 3 slides backwards and forwards on the bracket 2, in the running direction of the gripper.
the slider 3 has a fixed position (except for the clearance required for the sliding motion) on the bracket 2 perpendicularly to the movement direction of the gripper.
the base 2a is fixed to the loom in a transversally adjustable manner, i.e. perpendicularly to the gripper trajectory.
the base has slots 2a' which are eccentric with respect to a threaded hole where a cam knob (not shown) is screwed in.
this "transversal" adjustment simply determines the extent of the gripper opening which, as known, must be as small as admitted by weft release requirements: should different wefts be introduced, such opening is adjusted according to the weft having the largest count.
bracket 2 and base 2a causes the slider 3, as well as the motor 8, to be inclined, with respect of the weaving plane. It is therefore provided that the same device may be mounted onto different embodiments of the bracket/base element, in order to adapt the attitude of the slider to the specific gripper employed.
a control head 4 projects, which ends with a plane pivot hinge 6 in its upper portion.
An exact straight-line guide mechanism 7 (referred to also in the following, this type of mechanism being well-represented in EP 893,522 in the name of the same Applicant), equipped with a respective motor 8, is also mounted onto the bracket 2 and engages with its control pin 9 in the plane pivot hinge 6.
the gear box containing the straight-line guide mechanism 7 is mounted at one end of the motor 8, and its plan perimeter - as well as the rectilinear path of the control pin - may be inscribed in the motor plan perimeter. This results in an extremely compact motor/drive assembly.
the reciprocating rectilinear movement of the control pin 9 is capable of driving the slider 3 backwards and forwards obtaining the desired adjustment movement of the gripper-opening system in an extremely efficient way.
the motion law of the motor 8 can then be set and controlled by electronic control drive, which acts according to the logic implemented in suitable software.
position adjustment of the slider 3 and timing thereof on the basis of the loom cycle degrees may be defined in a table according to the weaving parameters involved (fabric height, loom speed, weft count, and so on).
the table can be built on a theoretical basis and then corroborated and/or adjusted by field trials.
a further type of control adjustment may be carried out on the basis of feedback, according to the reading of the weft thread release time (highlighted for example by the weft tension development detected by the weft feeler): the statistical processing of this parameter can be used, for example, to correct the drift of the weft release time due to wear of the slider shim 3.
the main control and feedback correction thereof may later be built into a database by means of which the setting data of an item may be transferred from one loom to the other to form a knowledge base which can benefit many users, for example through a central surveillance and control system as described in the European Patent application no. 02425574 in the name of the same Applicant.
the exact straight-line guide device 7 and the corresponding motor 8 are suitably tilted, which drastically limits the space they occupy on the horizontal or transversal plane. Furthermore, the synergistic coupling of the exact straight-line guide drive and the gripper-opening slider, with no connecting rods hinged to one another, is extremely compact and rigid.
this system allows precise control even in dynamic conditions.
the slider 3 may be quickly displaced to delay gripper opening at the time when slow running of the loom is required.
control pin of the exact straight-line guide mechanism can be easily protected during its motion along a straight-line track by a suitable shielding, to prevent dirt from penetrating inside the sensitive transmission mechanisms, with the further benefits of an enhanced duration of the device and jam-free operation thereof.
the motor control software may even decide whether it is more convenient to perform a certain slider travel by rotating the motor in one sense or in the opposite one. As a matter of fact, it is the logic implemented in the control software which establishes - on the basis of the current position x and of the final position x+n that the slider is to assume to open the gripper in the subsequent loom cycle - whether to continue the rotation in the same sense or whether to reverse it, so that the least time is employed and so as to be in a stationary condition when the gripper arrives.

Landscapes

Engineering & Computer Science (AREA)
Textile Engineering (AREA)
Looms (AREA)
Arc-Extinguishing Devices That Are Switches (AREA)
Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Control And Other Processes For Unpacking Of Materials (AREA)
Glass Compositions (AREA)
Devices For Opening Bottles Or Cans (AREA)
Manipulator (AREA)
Mechanical Means For Catching Fish (AREA)
De-Stacking Of Articles (AREA)
Treatment Of Fiber Materials (AREA)
Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)

EP04100265A 2003-06-26 2004-01-26 Motorisch angetriebene Vorrichtung zum Öffnen eines Greifers Expired - Lifetime EP1491670B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
ITMI20030293		2003-06-26
IT000293U ITMI20030293U1 (it)	2003-06-26	2003-06-26	Apripinza motorizzato perfezionato

Publications (3)

Publication Number	Publication Date
EP1491670A2 true EP1491670A2 (de)	2004-12-29
EP1491670A3 EP1491670A3 (de)	2005-05-11
EP1491670B1 EP1491670B1 (de)	2009-11-11

Family

ID=30012571

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP04100265A Expired - Lifetime EP1491670B1 (de)	2003-06-26	2004-01-26	Motorisch angetriebene Vorrichtung zum Öffnen eines Greifers

Country Status (6)

Country	Link
EP (1)	EP1491670B1 (de)
CN (1)	CN2718000Y (de)
AT (1)	ATE448342T1 (de)
DE (1)	DE602004024003D1 (de)
ES (1)	ES2336557T3 (de)
IT (1)	ITMI20030293U1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2016177601A1 (en)	2015-05-07	2016-11-10	Picanol	Gripper opener for a weaving machine
ITUB20155478A1 (it) *	2015-11-11	2017-05-11	Pezzoli Miria	Dispositivo per l?apertura di un elemento di presa di filo di trama di un telaio a pinza, relativo 5 elemento di presa e metodo di apertura di un tale elemento di presa

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
BE695650A (de) *	1966-05-10	1967-09-01
DE3812966A1 (de) *	1987-10-02	1989-04-20	Textilma Ag	Greiferwebmaschine
KR20000005448A (ko) *	1996-04-19	2000-01-25	쉬테베르링크 미헬, 쉬테베르링크 파트릭	직조기 그리퍼의 그리퍼 고정부의 개방을 위한 장치2
IT1293618B1 (it) *	1997-07-17	1999-03-08	Vamatex Nuova Spa	Dispositivo di comando per la legatura a giro inglese in telai di tessitura

2003
- 2003-06-26 IT IT000293U patent/ITMI20030293U1/it unknown
2004
- 2004-01-26 AT AT04100265T patent/ATE448342T1/de not_active IP Right Cessation
- 2004-01-26 ES ES04100265T patent/ES2336557T3/es not_active Expired - Lifetime
- 2004-01-26 EP EP04100265A patent/EP1491670B1/de not_active Expired - Lifetime
- 2004-01-26 DE DE602004024003T patent/DE602004024003D1/de not_active Expired - Lifetime
- 2004-06-24 CN CNU200420073211XU patent/CN2718000Y/zh not_active Expired - Lifetime

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2016177601A1 (en)	2015-05-07	2016-11-10	Picanol	Gripper opener for a weaving machine
CN107580638A (zh) *	2015-05-07	2018-01-12	必佳乐公司	用于织机的片梭张开器
CN107580638B (zh) *	2015-05-07	2020-02-18	必佳乐公司	用于织机的片梭张开器
ITUB20155478A1 (it) *	2015-11-11	2017-05-11	Pezzoli Miria	Dispositivo per l?apertura di un elemento di presa di filo di trama di un telaio a pinza, relativo 5 elemento di presa e metodo di apertura di un tale elemento di presa
WO2017081712A3 (en) *	2015-11-11	2017-06-15	P.T.M.T. S.R.L.	Device for opening a gripping element of weft yarn of a gripper loom, related gripping element and method for opening such gripping element
CN108291336A (zh) *	2015-11-11	2018-07-17	P.T.M.T.有限责任公司	打开片梭织机的纬纱的夹纱元件的设备，相关夹纱元件和用于打开该夹纱元件的方法

Also Published As

Publication number	Publication date
ITMI20030293U1 (it)	2004-12-27
ATE448342T1 (de)	2009-11-15
CN2718000Y (zh)	2005-08-17
EP1491670A3 (de)	2005-05-11
ITMI20030293V0 (it)	2003-06-26
HK1074227A1 (en)	2005-11-04
EP1491670B1 (de)	2009-11-11
ES2336557T3 (es)	2010-04-14
DE602004024003D1 (de)	2009-12-24

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Publication	Publication Date	Title
US5400834A (en)	1995-03-28	Apparatus for selectively moving weft feeders between a rest position and a feed position
BE1009375A6 (nl)	1997-02-04	Kanteninrichting voor weefmachines.
US4706584A (en)	1987-11-17	Control unit for providing seam length control of a sewing machine
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EP1491670B1 (de)	2009-11-11	Motorisch angetriebene Vorrichtung zum Öffnen eines Greifers
KR100272353B1 (ko)	2000-11-15	낙하판 바아를 구비한 경편기
US4883210A (en)	1989-11-28	Material feeding apparatus
RU2091640C1 (ru)	1997-09-27	Высокоскоростная поворотная каретка
HK1074227B (en)	2010-05-20	Improved motor-driven gripper opening device
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