EP0066655A1 - Frame-driving unit for weaving looms - Google Patents
Frame-driving unit for weaving looms Download PDFInfo
- Publication number
- EP0066655A1 EP0066655A1 EP81200591A EP81200591A EP0066655A1 EP 0066655 A1 EP0066655 A1 EP 0066655A1 EP 81200591 A EP81200591 A EP 81200591A EP 81200591 A EP81200591 A EP 81200591A EP 0066655 A1 EP0066655 A1 EP 0066655A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lever
- frame
- programming unit
- rotation
- point
- 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.)
- Withdrawn
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C13/00—Shedding mechanisms not otherwise provided for
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C1/00—Dobbies
- D03C1/14—Features common to dobbies of different types
- D03C1/144—Features common to dobbies of different types linking to the heald frame
Definitions
- This invention relates to a frame-driving unit for weaving looms, especially for looms equipped with a programming unit such as a dobby or the like.
- the frames are controlled positively from the afore-mentioned programming unit from their lower position to their higher position, wherein they can further be brought back in the low position by means of springs provided therefor.
- a characteristic known kinematic chain consists e.g. at least of a rocking arm subject to the above-mentioned programming unit; a flexible joint between this arm or lever and a second arm or lever which is supported to a fixed part of the loom; a tie rod between this second lever and a frame; and a spring means that makes contact with the afore-mentioned second lever.
- the present invention relates to a driving mechanism of the type as described above and in the preamble of the main claim.
- a programming unit 3 e.g. a dobby, is mounted on girder 1 .
- a kinematic chain is provided mainly consisting of :
- Each push rod 10 is hinged in 12 on the corresponding lever 6.
- the point of contact of spring means 11 on it is indicated by 13.
- Every lever 6 shows a circular leg 14 to which an extremity of the corresponding flexible connection 8 is fixed, viz. in an outward direction with respect to the centre of girder 1 and the point of rotation 7.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
Frame-driving unit for weaving looms equipped with a programming unit, said triving unit being of the type wherein a kinematic chain is provided, between said programming unit (3) and a frame (4), which kinematic chain at least consists of a rocking arm (5) subject to said programming unit; a flexible connection (8) between this arm and a second lever (6) which is mounted to a fixed part (1) of the loom; a rod (10) between said second lever (6) and a frame (4); and of a spring means (11) making contact with said second lever, characterized thereby that the geometry of the various points of rotation and connection (7, 9, 12, 13, 14) of said chain has been chosen in such a way that every rotation of said rocking arm (5) occasioned by the programming unit results in a positive downward movement of the frame (4).
Description
- This invention relates to a frame-driving unit for weaving looms, especially for looms equipped with a programming unit such as a dobby or the like.
- In most looms of this type the frames are controlled positively from the afore-mentioned programming unit from their lower position to their higher position, wherein they can further be brought back in the low position by means of springs provided therefor.
- A characteristic known kinematic chain consists e.g. at least of a rocking arm subject to the above-mentioned programming unit; a flexible joint between this arm or lever and a second arm or lever which is supported to a fixed part of the loom; a tie rod between this second lever and a frame; and a spring means that makes contact with the afore-mentioned second lever.
- Driving systems of that kind offer numerous disadvantages. It has been seen that the formation of the bottom shed of the gap in many looms required more force than the formation of the top shed. From a mechanical point of view it is thus somewhat illogical to positively control the upward movements of the frames.
- This positive upward movement of the frames also results in the fact that the afore-mentioned second levers should be supported above the frames. This requires a relatively massive construction of the conventional girders and the conventional architrave.
- It has to be remarked that other types of frame-driving mechanisms have also been proposed with which a positive downward movement of the frames or even a desmodromic motion could be obtained. Driving mechanisms of that kind, however, are expensive and cannot be made free from play.
- The present invention relates to a driving mechanism of the type as described above and in the preamble of the main claim.
- It is characterized thereby that the geometry of the various points of rotation and coupling of the above-mentioned chain is chosen in such a way that every positive rotation of said rocking arm occasioned by the programming unit results in a positive downard movement of the frame.
- The invention will now be illustrated more detailedly by means of the accompanying drawing, which represents a schematical front view of a device according to the present invention.
- In the drawing an
architrave 1 of a weaving loom is represented, which is supported by twogirders 2. - On girder 1 a programming unit 3, e.g. a dobby, is mounted.
- Between this programming unit 3 and every frame 4 a kinematic chain is provided mainly consisting of :
- - a rocking
arm 5, which can be rotated positively by the programming unit in the sense of arrow Fl; - - on the girder 1_ and on both of its extremities a second lever 6, which is supported in 7;
- - between the
lever 5 and every lever 6 aflexible connection 8, which each time runs over a guidingroller 9; - - between every lever 6 and the frame 4 a
push rod 10; and - - for every
lever 8 each time a spring means 11 which is connected with thecorresponding girder 2. - Each
push rod 10 is hinged in 12 on the corresponding lever 6. The point of contact of spring means 11 on it is indicated by 13. - The geometry of the thus described chain has been chosen in such a way that a positive downward movement (arrow F2) of the
frame 4 corresponds with every positive movement (Fl) of alever 5. For that purpose thepoints points girder 1. - Every lever 6 shows a
circular leg 14 to which an extremity of the correspondingflexible connection 8 is fixed, viz. in an outward direction with respect to the centre ofgirder 1 and the point of rotation 7. - It has to be noticed that the points of rotation 7 are applied at either side above
girders 2, which benefits the sturdiness of the construction. - It is evident that various modifications can be made to the above-described embodiment without departing from the scope of the invention.
Claims (2)
1.- Frame-driving unit for weaving looms equipped with a programming unit, said driving unit being of the type wherein a kinematic chain is provided, between said programming unit (3) and a frame (4), which kinematic chain at least consists of a rocking arm (5) subject to said programming unit; a flexible connection (8) between this arm and a second lever (6) which is mounted to a fixed part (1) of the loom; a rod (10) between said second lever (6) and a frame (4); and of a spring means (11) making contact with said second lever, characterized thereby that the geometry of the various points of rotation and connection (7, 9, 12, 13, 14) of said chain has been chosen in such a way that every rotation of said rocking arm (5) occasioned by the programming unit results in a positive downward movement of the frame (4).
2.- Frame-driving unit according to claim 1 for weaving looms equipped with a architrave (1) supported at both extremeties by girders (2) on which said programming unit (3), rocking arm (5) and a second lever (6) are mounted, characterized thereby that the second lever (6) is supported on the architrave (1) and above a girder (2), said rod (10) being connected with this second lever in a point (12) between the centre of the architrave (1) and the point of rotation (7) of said lever (6), said spring means (11) making contact with said lever (6) in a point (13), which is located substantially symmetrically with said point of connection (12) of the rod with respect to the point of rotation (7) of the second lever (6).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP81200591A EP0066655A1 (en) | 1981-06-01 | 1981-06-01 | Frame-driving unit for weaving looms |
YU01085/82A YU108582A (en) | 1981-06-01 | 1982-05-21 | Driving device for the frame of weaving looms |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP81200591A EP0066655A1 (en) | 1981-06-01 | 1981-06-01 | Frame-driving unit for weaving looms |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0066655A1 true EP0066655A1 (en) | 1982-12-15 |
Family
ID=8188128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81200591A Withdrawn EP0066655A1 (en) | 1981-06-01 | 1981-06-01 | Frame-driving unit for weaving looms |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0066655A1 (en) |
YU (1) | YU108582A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0085108A1 (en) * | 1980-12-27 | 1983-08-10 | Yamada Dobby Co., Ltd. | Method of driving heald frame for negative dobby machine, negative cam machine |
US4481979A (en) * | 1982-09-16 | 1984-11-13 | Yamada Dobby Co., Ltd. | Heald frame driving method in negative dobby machines or cam machines |
EP0133966A2 (en) * | 1983-08-12 | 1985-03-13 | FIMTESSILE FABBRICA ITALIANA MACCHINARIO TESSILE S.p.A. | Heald frames control linkage in weave machines |
US4603713A (en) * | 1983-02-28 | 1986-08-05 | Murata Kikai Kabushiki Kaisha | Lifting device for a heddle frame |
US4687029A (en) * | 1984-09-18 | 1987-08-18 | Murata Kikai Kabushiki Kaisha | Means for lifting motion of a heddle frame |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1125968A (en) * | 1964-11-02 | 1968-09-05 | Hijos De J Serra Borras | Looms |
GB1125969A (en) * | 1964-11-02 | 1968-09-05 | Sergio Serra Xaus | Looms |
FR2477186A1 (en) * | 1980-02-28 | 1981-09-04 | Staubli Sa Ets | Negative draft dobby loom - has two oscillating levers, connected to dobby and springs |
-
1981
- 1981-06-01 EP EP81200591A patent/EP0066655A1/en not_active Withdrawn
-
1982
- 1982-05-21 YU YU01085/82A patent/YU108582A/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1125968A (en) * | 1964-11-02 | 1968-09-05 | Hijos De J Serra Borras | Looms |
GB1125969A (en) * | 1964-11-02 | 1968-09-05 | Sergio Serra Xaus | Looms |
FR2477186A1 (en) * | 1980-02-28 | 1981-09-04 | Staubli Sa Ets | Negative draft dobby loom - has two oscillating levers, connected to dobby and springs |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0085108A1 (en) * | 1980-12-27 | 1983-08-10 | Yamada Dobby Co., Ltd. | Method of driving heald frame for negative dobby machine, negative cam machine |
EP0085108A4 (en) * | 1980-12-27 | 1985-09-02 | Yamada Dobby Co Ltd | Method of driving heald frame for negative dobby machine, negative cam machine. |
US4481979A (en) * | 1982-09-16 | 1984-11-13 | Yamada Dobby Co., Ltd. | Heald frame driving method in negative dobby machines or cam machines |
US4603713A (en) * | 1983-02-28 | 1986-08-05 | Murata Kikai Kabushiki Kaisha | Lifting device for a heddle frame |
EP0133966A2 (en) * | 1983-08-12 | 1985-03-13 | FIMTESSILE FABBRICA ITALIANA MACCHINARIO TESSILE S.p.A. | Heald frames control linkage in weave machines |
EP0133966A3 (en) * | 1983-08-12 | 1986-03-26 | FIMTESSILE FABBRICA ITALIANA MACCHINARIO TESSILE S.p.A. | Heald frames control linkage in weave machines |
US4687029A (en) * | 1984-09-18 | 1987-08-18 | Murata Kikai Kabushiki Kaisha | Means for lifting motion of a heddle frame |
Also Published As
Publication number | Publication date |
---|---|
YU108582A (en) | 1985-08-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): BE CH DE FR GB IT LI NL |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19831121 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SHAW, HENRY ANWYL |