EP0133966A2 - Heald frames control linkage in weave machines - Google Patents
Heald frames control linkage in weave machines Download PDFInfo
- Publication number
- EP0133966A2 EP0133966A2 EP84108930A EP84108930A EP0133966A2 EP 0133966 A2 EP0133966 A2 EP 0133966A2 EP 84108930 A EP84108930 A EP 84108930A EP 84108930 A EP84108930 A EP 84108930A EP 0133966 A2 EP0133966 A2 EP 0133966A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- linkage
- bar
- frame
- rigid bar
- angle levers
- 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- Withdrawn
Links
- 238000009941 weaving Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices
Definitions
- This invention relates to those devices mounted on weaving looms for determining the shed formation in accordance with the required weave for the fabric being formed.
- Device of this type are known to generally comprise a mechanism or "dobby" provided with a series of control members governed by a reading device, which receives programmed instructions contained in punched cards, in a punched paper tape or in a drum or chain with points.
- a reading device which receives programmed instructions contained in punched cards, in a punched paper tape or in a drum or chain with points.
- Each of these dobby memebers is connected to a heald frame, each heald being formed from an eye traversed by one of the warp threads.
- the selective vertical movement of these frames causes opening of the warp threads to allow passage of the weft threads in accordance with a prechosen programme corresponding to the pattern or weave to be obtained.
- Conventional dobbies comprise those of positive type in which the frames are driven positively upwards and downwards to overcome the reaction of the taut warp threads, and those of negative type in which said drive is in a single direction, in opposition to elastic return components.
- the present invention relates to dobbies of the second type.
- the present invention obviates this drawback by means of a linkage characterised by comprising a rigid bar controlled by said machine; a plurality of angle levers which are pivoted to the loom frame, are hinged to said bar and are connected by connecting rods to the heald frame; and spring return means acting on said rigid bar.
- the reference numeral 1 indicates the weaving machine (negative dobby) with its control lever 2
- the reference numeral 3 indicates the heald frame
- the frame 3 is controlled by the lever 2 from below by way of a rigid bar 4 and a system of angle levers 5 and connecting rods 6.
- the angle levers 5 are pivoted at their angle to the loom frame at 7, and have their ends hinged to the bar 4 and connecting rods 6. These latter are adjustable, being formed with a telescopic extension 6A which can be locked in various positions by means of screws 6B.
- the arrangement of Figure 1 comprises a series of return springs 8 acting substantially axially on the bar 4 by way of a swivel-mounted connector 9.
- the aforesaid embodiment has the great advantage that the return springs 8 act directly on the pull bar 4 and thus the articulated joints of the levers 5 support no extra load due to the return effect of the springs, the entire tension of the springs being supported only by the pull bar 4 and by the weaving machine 1. Moreover, the lever arrangement is such that the bar 4 operates under tension. The method is therefore very rational and effective.
- one of the angle levers of the linkage is replaced by a T lever 10 pivoted at its cross-point 11 to the loom frame and hinged at the end of its shank to the bar 4 and at one end of its arm to a connecting rod 6.
- the action of the return springs 8, which are disposed perpendicular to the bar 4, is applied at 12 to the other end of the arm of said T lever by way of a swivel-mounted connector 9.
- FIG. 3 A modification of the embodiment of Figure 2 is shown in Figure 3.
- This linkage uses two modified angle levers 5 comprising a protuberance 5A to which the action of return spring 8, in this case inclined to the bar 4, is applied by way of swivel-mounted connectors 9.
- Figure 4 shows a further scheme for controlling the heald frame from below, in which the rocker control lever and the first angle lever of the system are combined into a single toggle-joint lever 13 connected to the frame 3 by a connecting rod 6. There are also one or more other angle levers 5 and connecting rods 6 between the bar 4 and frame 3.
- the control system acts by lowering the frame 3, and the return springs 8 are mounted - axially to the bar 4 - in such a manner as to return the frame 3 to its raised position.
- Figure 5 shows a system for controlling the frame 3 from above.
- the control lever and first angle lever of the system are combined into a single toggle-joint lever 14 connected to the frame 3 by a connecting rod 6, one or more other angle levers 5 also being provided.
- the return springs 8 are disposed in such a manner as to return the heald frame 3 from its raised position to its lowered position, the weaving machine thus driving the frame only upward.
- the connection between the lever 14 and levers 5 is again made by means of a rigid bar 4 (on which the springs 8 act axially), and the connecting rods 6 which connect the lever 5 and 14 to the frame 3 are also rigid.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
In a weave machine of negative type, the heald frames are controlled by means of a linkage comprising: a rigid bar controlled by said machine; a plurality of angle levers which are pivoted to the loom frame, are hinged to said bar and are connected by connecting rods to the heald frame; and spring return means acting on said rigid bar.
Description
- This invention relates to those devices mounted on weaving looms for determining the shed formation in accordance with the required weave for the fabric being formed.
- Device of this type are known to generally comprise a mechanism or "dobby" provided with a series of control members governed by a reading device, which receives programmed instructions contained in punched cards, in a punched paper tape or in a drum or chain with points. Each of these dobby memebers is connected to a heald frame, each heald being formed from an eye traversed by one of the warp threads. The selective vertical movement of these frames causes opening of the warp threads to allow passage of the weft threads in accordance with a prechosen programme corresponding to the pattern or weave to be obtained.
- Conventional dobbies comprise those of positive type in which the frames are driven positively upwards and downwards to overcome the reaction of the taut warp threads, and those of negative type in which said drive is in a single direction, in opposition to elastic return components. The present invention relates to dobbies of the second type.
- Known construction of such dobbies of negative type already exist, in which the heald frames are pulled upwards (or downwards) by a pair of cables and returned to their low (or high) position by springs which act on rocker arms connected to the frames. These methods used up to the present time in weaving give rise to various drawbacks in that the cables tend to stretch against the action of the springs, so changing the level of the frame. It is therefore necessary to continuously reset the original position of the frames by adjusting tensioning devices disposed at the end of the cables.
- The present invention obviates this drawback by means of a linkage characterised by comprising a rigid bar controlled by said machine; a plurality of angle levers which are pivoted to the loom frame, are hinged to said bar and are connected by connecting rods to the heald frame; and spring return means acting on said rigid bar.
- The invention is represented on the accompanying drawings which show overall diagrammatic views of some preferred embodiments thereof, one for each of Figures 1 to 5, of which a detailed description is given hereinafter by way of example.
- In figure 1, the reference numeral 1 indicates the weaving machine (negative dobby) with its
control lever 2, and thereference numeral 3 indicates the heald frame. - According to the invention, the
frame 3 is controlled by thelever 2 from below by way of arigid bar 4 and a system of angle levers 5 and connectingrods 6. - According to the invention, the
angle levers 5 are pivoted at their angle to the loom frame at 7, and have their ends hinged to thebar 4 and connectingrods 6. These latter are adjustable, being formed with atelescopic extension 6A which can be locked in various positions by means ofscrews 6B. - Rotating the
control lever 2 clockwise, in accordance with the arrow, causes theframe 3 to rise. - For its return to its lowered position, the arrangement of Figure 1 comprises a series of
return springs 8 acting substantially axially on thebar 4 by way of a swivel-mountedconnector 9. - The aforesaid embodiment has the great advantage that the
return springs 8 act directly on thepull bar 4 and thus the articulated joints of thelevers 5 support no extra load due to the return effect of the springs, the entire tension of the springs being supported only by thepull bar 4 and by the weaving machine 1. Moreover, the lever arrangement is such that thebar 4 operates under tension. The method is therefore very rational and effective. - In the embodiment of Figure 2, one of the angle levers of the linkage is replaced by a
T lever 10 pivoted at itscross-point 11 to the loom frame and hinged at the end of its shank to thebar 4 and at one end of its arm to a connectingrod 6. The action of thereturn springs 8, which are disposed perpendicular to thebar 4, is applied at 12 to the other end of the arm of said T lever by way of a swivel-mountedconnector 9. - A modification of the embodiment of Figure 2 is shown in Figure 3. This linkage uses two modified
angle levers 5 comprising aprotuberance 5A to which the action ofreturn spring 8, in this case inclined to thebar 4, is applied by way of swivel-mountedconnectors 9. - Figure 4 shows a further scheme for controlling the heald frame from below, in which the rocker control lever and the first angle lever of the system are combined into a single toggle-
joint lever 13 connected to theframe 3 by a connectingrod 6. There are also one or more other angle levers 5 and connectingrods 6 between thebar 4 andframe 3. In this case, the control system acts by lowering theframe 3, and thereturn springs 8 are mounted - axially to the bar 4 - in such a manner as to return theframe 3 to its raised position. - Finally, Figure 5 shows a system for controlling the
frame 3 from above. Again in this case, the control lever and first angle lever of the system are combined into a single toggle-joint lever 14 connected to theframe 3 by a connectingrod 6, one or moreother angle levers 5 also being provided. Thereturn springs 8 are disposed in such a manner as to return theheald frame 3 from its raised position to its lowered position, the weaving machine thus driving the frame only upward. The connection between thelever 14 andlevers 5 is again made by means of a rigid bar 4 (on which thesprings 8 act axially), and the connectingrods 6 which connect thelever frame 3 are also rigid. - Many other embodiments are also possible, and these fall within the scope of the present invention.
Claims (6)
1) A linkage for weaving machines of negative type, characterised by comprising: a rigid bar controlled by said machine; a plurality of angle levers which are pivoted to the loom frame, are hinged to said bar and are connected by connecting rods to the heald frame; and spring return means acting on said rigid bar.
2) A linkage as claimed in claim 1), wherein the spring means act axially on said rigid bar.
3) A linkage as claimed in claim 1), wherein said connecting rods are of adjustable length.
4) A linkage as claimed in claim 1), wherein the spring means act perpendicularly to said rigid bar, on a right-angled appendix of one of said angle levers.
5) A linkage as claimed in claim 1), wherein the spring means act obliquely to said rigid bar, on protuberances of one of the arms of said angle levers.
6) A linkage as claimed in claim 1), wherein one of said angle levers is combined with the control lever of the weaving machine.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2254383 | 1983-08-12 | ||
IT8322543A IT8322543A0 (en) | 1983-08-12 | 1983-08-12 | LINKAGE FOR CONTROL OF HEDDLER FRAMES IN NEGATIVE WEAVING MACHINES. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0133966A2 true EP0133966A2 (en) | 1985-03-13 |
EP0133966A3 EP0133966A3 (en) | 1986-03-26 |
Family
ID=11197638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84108930A Withdrawn EP0133966A3 (en) | 1983-08-12 | 1984-07-27 | Heald frames control linkage in weave machines |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0133966A3 (en) |
IT (1) | IT8322543A0 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5002096A (en) * | 1988-10-04 | 1991-03-26 | Sulzer Brothers Limited | Heddle frame actuating apparatus with flexure spring |
US5201199A (en) * | 1991-09-10 | 1993-04-13 | Karl Mayer Textilmaschinenfabrik Gmbh | Warp knitting machine with differently resonant springs |
EP0627512A1 (en) * | 1993-06-03 | 1994-12-07 | S.A. DES ETABLISSEMENTS STAUBLI (France) | Damping device for looms |
WO1997013900A1 (en) * | 1995-10-12 | 1997-04-17 | Somet Societa' Meccanica Tesssile P.A. | System for controlling the heald frames of double-beam vertical looms |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE671650A (en) * | 1964-11-02 | 1966-02-14 | ||
FR2254503A1 (en) * | 1973-12-13 | 1975-07-11 | Rieter Ag Maschf | |
DE2651239B1 (en) * | 1976-11-10 | 1977-12-01 | Jaeger Emil Kg | PRESSURE MEDIUM CYLINDER FOR DRIVING WEBSITES |
FR2477186A1 (en) * | 1980-02-28 | 1981-09-04 | Staubli Sa Ets | Negative draft dobby loom - has two oscillating levers, connected to dobby and springs |
FR2488289A1 (en) * | 1980-08-06 | 1982-02-12 | Staubli Sa Ets | Negative dobby-shedding mechanism - has horizontal jack levers with cable connections to operating levers beneath heald shafts |
EP0066655A1 (en) * | 1981-06-01 | 1982-12-15 | N.V. Weefautomaten Picanol | Frame-driving unit for weaving looms |
-
1983
- 1983-08-12 IT IT8322543A patent/IT8322543A0/en unknown
-
1984
- 1984-07-27 EP EP84108930A patent/EP0133966A3/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE671650A (en) * | 1964-11-02 | 1966-02-14 | ||
FR2254503A1 (en) * | 1973-12-13 | 1975-07-11 | Rieter Ag Maschf | |
DE2651239B1 (en) * | 1976-11-10 | 1977-12-01 | Jaeger Emil Kg | PRESSURE MEDIUM CYLINDER FOR DRIVING WEBSITES |
FR2477186A1 (en) * | 1980-02-28 | 1981-09-04 | Staubli Sa Ets | Negative draft dobby loom - has two oscillating levers, connected to dobby and springs |
FR2488289A1 (en) * | 1980-08-06 | 1982-02-12 | Staubli Sa Ets | Negative dobby-shedding mechanism - has horizontal jack levers with cable connections to operating levers beneath heald shafts |
EP0066655A1 (en) * | 1981-06-01 | 1982-12-15 | N.V. Weefautomaten Picanol | Frame-driving unit for weaving looms |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5002096A (en) * | 1988-10-04 | 1991-03-26 | Sulzer Brothers Limited | Heddle frame actuating apparatus with flexure spring |
US5201199A (en) * | 1991-09-10 | 1993-04-13 | Karl Mayer Textilmaschinenfabrik Gmbh | Warp knitting machine with differently resonant springs |
EP0627512A1 (en) * | 1993-06-03 | 1994-12-07 | S.A. DES ETABLISSEMENTS STAUBLI (France) | Damping device for looms |
FR2705972A1 (en) * | 1993-06-03 | 1994-12-09 | Staubli Sa Ets | Damping device for weaving machine. |
WO1997013900A1 (en) * | 1995-10-12 | 1997-04-17 | Somet Societa' Meccanica Tesssile P.A. | System for controlling the heald frames of double-beam vertical looms |
Also Published As
Publication number | Publication date |
---|---|
EP0133966A3 (en) | 1986-03-26 |
IT8322543A0 (en) | 1983-08-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB2047755A (en) | Improvements in loom heald control means | |
US4569373A (en) | Terrycloth weaving machine | |
JP3255452B2 (en) | Apparatus for forming a shed in a loom | |
US3952778A (en) | Selvage forming device | |
EP0133966A2 (en) | Heald frames control linkage in weave machines | |
US3991793A (en) | Eccentric drive for a dobby | |
US5462093A (en) | Damper device for weaving machine oscillating members | |
US6244304B1 (en) | Doup end tension regulating device for a selvedge former | |
US5183080A (en) | Shed forming device for griffe frames | |
JPH0835144A (en) | Weaving mechanism | |
US2647541A (en) | Leno weaving | |
SU1313357A3 (en) | Shedding motion for wave-type shedding loom | |
US4460020A (en) | Device for actuating heddle frames in weaving looms | |
CZ284075B6 (en) | Loom | |
GB2238553A (en) | Device for effectively leno-weaving the lateral edge of a fabric in a loom | |
US5285819A (en) | Dobby drawing device | |
US4481979A (en) | Heald frame driving method in negative dobby machines or cam machines | |
US5103873A (en) | Mechanism for controlling griffe frame movement | |
US3456691A (en) | Shed-forming apparatus for a loom | |
US3171443A (en) | Selvage forming mechanism | |
EP0085108A1 (en) | Method of driving heald frame for negative dobby machine, negative cam machine | |
US3371687A (en) | Harnesses for jacquard machines | |
US3125128A (en) | Pfarrwaller | |
EP0522216A1 (en) | Jacquard mechanism | |
US3191634A (en) | Means for forming selvages in looms |
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): AT BE CH DE FR GB LI LU NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
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: 19860927 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: CREMONESI, GIAN LUIGI |