EP0867545A1 - Device for automatic replacement of the cloth beam in weaving looms - Google Patents
Device for automatic replacement of the cloth beam in weaving looms Download PDFInfo
- Publication number
- EP0867545A1 EP0867545A1 EP98105507A EP98105507A EP0867545A1 EP 0867545 A1 EP0867545 A1 EP 0867545A1 EP 98105507 A EP98105507 A EP 98105507A EP 98105507 A EP98105507 A EP 98105507A EP 0867545 A1 EP0867545 A1 EP 0867545A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- fabric
- cloth beam
- standby
- edge
- 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.)
- Granted
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
- D03J1/00—Auxiliary apparatus combined with or associated with looms
- D03J1/001—Cloth or warp beam replacement
Definitions
- the present invention relates to a device for automatic replacement of the cloth beam in weaving looms.
- the invention relates to a device which allows the cloth to be cut automatically when the cloth beam has reached the desired dimensions and said beam to be replaced with a new roller, with winding of the free edge of the new cloth being formed thereon.
- the device according to the present invention allows the abovementioned operations to be performed without having to interrupt the normal operation of the loom and may be applied successfully both to horizontal looms and to vertically extending looms which therefore have the cloth beam in the top part of the loom itself.
- One object of the present invention is to overcome this drawback by providing a device which is able to perform automatically replacement of the cloth beam with a new roller which, for this operation, does not require action on the part of any operator, except for removal of the full cloth beam.
- Another particularly important object of the present invention is that of allowing the entire operation of replacement of the cloth beam to be performed without even minimum stoppage of the loom, which is thus able to maintain unchanged its full production output.
- a further object of the present invention is that of providing an automatic device for replacement of the cloth which allows, where necessary, the operation of picking up of the full cloth beam to be delayed considerably with respect to the moment when it becomes full, for example for up to 30 minutes, without requiring either action on the part of an operator or interruption of the loom operation.
- a last object of the present invention is that of allowing the operation of replenishing of the loom with the new roller to be performed during a time period different from that in which replacement of the cloth beam takes place, thus allowing optimization of the operator intervention time.
- a device for automatic replacement of the cloth beam in a weaving loom of the type in which the cloth beam is supported and driven by a pair of cylinders on which it rests with its peripheral surface, characterized in that it comprises a pair of cradle arms for supporting an empty standby roller, automatic means for cutting the fabric, means for guiding the edge of the cut fabric around said standby cloth roller and means for causing rotation of said roller, said cradle arms oscillating between a first position in which said standby roller is located alongside the cloth beam and a second position in which said roller is free to position itself so as to rest on said driving cylinders.
- FIGs. 1 and 2 show the cloth beam 1 which rests on the pair of cylinders 2 and 3, respectively called a roll-pushing cylinder and a roll-winding cylinder, which perform and control winding thereof.
- the two cylinders 2 and 3 are operated by the cloth-pulling cylinder 4, via the toothed chain 5, in accordance with the arrangement already described in WO97/13899 in the name of the same Applicant.
- the device for automatic replacement of the cloth beam according to the present invention is arranged in this zone of the loom, namely in a lateral position with respect to the cloth beam 1 and the roll-winding cylinder 3.
- This device consists of several cooperating parts, namely: means for supporting and moving a standby roller; means for guiding and cutting the fabric; means for guiding and winding the new free edge of the fabric around said standby roller. These means will be described separately and in detail below.
- the means supporting and moving the standby roller 1R consist of a pair of cradle arms 6 arranged at the two ends of the loom, at a distance such as to be able to receive between them the standby roller 1R which rests with its central pin inside the free cradle-shaped ends 7 of the arms.
- Said arms 6 are pivotably mounted in a central position on a common axis which, in the embodiment shown, coincides for the sake of constructional convenience with that of the roll-winding cylinder 3.
- the ends of the arms 6 opposite to the cradle-shaped ends 7 are operated by two corresponding cylinder-and-piston units 8, which are preferably pneumatically operated, between a standby position 6A and a loading position 6C which can be clearly seen in Fig. 5.
- the shape of the cradle arms 6 is such that, in the loading position 6C, they form a slightly inclined support surface for the pin of the roller 1R so as to allow disengagement of the roller IR from the arms 6 simply by means of the force of gravity, as will be explained more clearly below.
- the means for guiding and cutting the fabric consist of a rectangular guide bar 9 with rounded edges, arranged immediately downstream of the roll-winding roller 3 and able to cause deviation of the path of the fabric being formed, away from the cloth beam 1 and towards the standby roller 1R, as can be clearly seen in Fig. 1.
- the guide bar 9 accommodates internally the fabric cutting means which can be seen more clearly in Figs. 2, 3 and 4 and which consist of a carriage 10 sliding on the guide 9 and carrying a fixed triangular cutter 11 and a rotary blade 12.
- the movement is imparted to the carriage 10 by an electric or pneumatic motor 13 via a belt 14 which extends in annular fashion across the whole width of the loom and has its ends fixed to the two sides of the carriage 10.
- the rotary movement for the rotary blade 12 is obtained by means of engagement of a gearwheel 15, which is fixed thereto and coaxial therewith, with a rectilinear rack 16 contained inside the guide bar 9.
- the arrangement of the fixed cutter 11 is such that its free end emerges from the edge of the guide bar 9 on which the fabric T rests.
- the means for guiding and winding the free edge of the fabric T around the standby roller 1R consist of a first series of fixed belt units 17 and a second series of oscillating belt units 18 which are suitable for controlling winding of the fabric T in the bottom part and in the upper part of the roller 1R, respectively.
- the belt units 17 extend between a rotating transverse shaft 19 which imparts movement to them and transmission bushes 21 mounted idle on a fixed shaft 20 so that the respective toothed belts 22 adhere elastically to the bottom part of the roller 1R.
- the belt units 18 are arranged between the same bushes 20 onto which the belts 22 engage, from which therefore they receive movement, and transmission bearings 23 fixed to the shaft 20 by means of rigid brackets 24.
- the shaft 20 - and together with them the brackets 24, the bearings 23 and hence the belt units 18 - are able to oscillate between a working position 23L and a rest position 23R (Fig. 5) as a result of the action of a cylinder-and-piston unit 26.
- the belts 25 of the units 18 adhere elastically to the upper surface of the standby roller 1R, in a manner entirely similar to that already seen for the belts 22 of the units 17.
- the fabric T supplied from the weaving zone passes, in an entirely conventional manner, across the cloth-pulling cylinder 4 and from here reaches the roll-winding cylinder 3.
- the fabric T no longer rests, following its usual path, in contact with the surface of the beam 1, but is deviated onto the bar 9 and then returns back onto the beam 1.
- the fabric T is always kept in close contact and properly tensioned against the side edge of the bar 9 from which the triangular cutter 11 of the cutting device projects.
- the cutting device is activated by operating the electric motor 13. Owing to the action of the endless belt 14 the cutting unit - formed by the carriage 10, the fixed cutter 11 and the rotary blade 12 - is rapidly displaced from one side to the other of the loom; during displacement the triangular cutter 11 grips the tensioned fabric and displaces it towards the inside of the bar until it is close to the rotary blade 12 where the fabric is cut with the maximum precision.
- the rotary blade 12 has a polygonal shape in plan view, as can be seen in Fig. 3.
- the cutting device is brought back into the rest position, while the tail end of the fabric is wound onto the beam 1 which continues to rotate about itself as a result of the action of the cylinders 2 and 3, until it is removed by a special bridge crane or truck and transferred to the packaging and despatch department.
- a special bridge crane or truck and transferred to the packaging and despatch department.
- the newly formed fabric therefore starts to be wound uniformly onto the replacement roller 1R, while the latter is in a lateral position - with respect to the ordinary position still occupied by the full cloth beam 1 - determined by the cradle arms in the position 6A shown in Fig. 5.
- the elasticity of the belts 22 and 25 and the possibility of performing gradual clockwise movement of the shaft 20, preferably in contrast with spring means, as winding of the fabric T onto the roller 1R proceeds, allows the weaving operation to be continued, keeping the roller 1R in this position even for very long periods of time, which can vary depending on the type of fabric being processed, but which are generally longer than at least 30 minutes.
- the operator therefore has a considerable amount of time available to plan carefully the operation of removing the full cloth beams 1 from the various working looms, avoiding any undesirable stoppage of the looms, since operation continues undisturbed with winding of the fabric onto the rollers 1R in the standby position.
- the operator performs displacement of the arms 6 which are displaced from the position 6A into the position 6C - an operation, this, which can obviously also be performed automatically by the control panel of the carriage or the bridge crane.
- the roller 1R is subjected on the one hand to the force of gravity, which pushes it along the inclined surface in the direction of the cylinders 2 and 3, while on the other hand it is retained by the fabric T which exerts a pulling force in the direction of the arrow F according to Fig. 5.
- the pulling force exerted by the fabric T therefore prevents the roller 1R from sliding with excessive speed along the inclined surface formed by the arm 6 in the position 6C and allows it to come into contact in a sufficiently gentle manner with the cylinder 2 and therefore - after the arm 6 has been brought again into the position 6A - into contact with the cylinder 3.
- the cylinder 1R has thus occupied its ordinary operating position, without the loom weaving operations or the fabric winding operations having been interrupted at all, providing moreover the operator with a long time during which to plan, more carefully and efficiently, removal of the full cloth beam, thus achieving the main objects of the invention.
- Replenishing of the loom with the empty replacement roller may therefore be performed at any time during winding of the cloth beam 1, since this operation merely requires positioning of the roller 1R on the cradle-shaped ends 7 of the arms 6. It is obvious, therefore, that, from this point of view as well, the desired objects of the invention have been achieved.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Replacement Of Web Rolls (AREA)
Abstract
Description
Claims (13)
- Device for automatic replacement of the cloth beam in a weaving loom, of the type in which the cloth beam is supported and driven by a pair of cylinders on which it rests with its peripheral surface, characterized in that it comprises a pair of cradle arms for supporting a standby cloth roller arranged parallel to the cloth beam, automatic means for cutting the fabric, means for guiding the edge of the cut fabric around said standby roller and means for causing rotation of said roller, said cradle arms oscillating in planes perpendicular to the axis of the roller between a first position in which said standby roller is located alongside the cloth beam and a second position in which said roller is free to position itself so as to rest on said driving cylinders.
- Device as claimed in claim 1, wherein said cradle arms are arranged on the two sides of the loom and have free cradle-shaped ends on which the ends of the axial pin of said standby roller rest.
- Device as claimed in claim 2, wherein said arms are hinged centrally on the same axis and are made to oscillate between said first and said second position by cylinder-and-piston means acting on their ends opposite to said cradle-shaped ends.
- Device as claimed in claim 3, wherein said axis coincides with the axis of one of the driving cylinders of the cloth beam.
- Device as claimed in claim 1, wherein said means for automatically cutting the fabric comprise a cross-bar which extends over the entire width of the loom and on one edge of which the path of the fabric being fed to the cloth beam is deviated away from said beam and towards said standby roller, and a device for cutting the fabric, slidable along said edge.
- Device as claimed in claim 5, wherein said cutting device is housed inside said bar and comprises a fixed triangular cutter, the tip of which emerges from the edge of the bar on which the fabric is deviated, and a rotary blade cooperating with said cutter.
- Device as claimed in claim 6, wherein said cutting device is mounted on a carriage movable along a guide extending longitudinally along said bar and drawn thereon by an endless belt driven by an electric or pneumatic motor.
- Device as claimed in claim 7, wherein said rotary blade is fixed to a gearwheel coaxial therewith, said gearwheel meshing with a rack-type profiled part extending longitudinally along said bar.
- Device as claimed in any one of claims 6 to 8, wherein said rotary blade has a polygonal profile.
- Device as claimed in claim 1, wherein said means for guiding the edge of the cut fabric around the standby roller and said means for causing rotation of the standby roller consist of a plurality of belt units arranged in contact with the rising semi-cylinder of said roller.
- Device as claimed in claim 10, wherein said belt units comprise lower fixed or elastically fixed units and upper units movable between one or more working positions, in which said units are in contact with the lateral surface of roller, and a rest position in which said units are made to move away from the surface of the roller.
- Device as claimed in any one of claims 5 to 11, wherein an inclined plate for accompanying the free edge of the fabric immediately after the cutting operation is arranged between the edge of said bar which deviates the fabric and the bottom part of said standby roller.
- Device as claimed in any one of the preceding claims, wherein said standby roller, in said first position, has a capacity for taking up fabric equivalent to at least 30 minutes' operation of the loom.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI970727 | 1997-03-27 | ||
IT97MI000727A IT1290492B1 (en) | 1997-03-27 | 1997-03-27 | DEVICE FOR AUTOMATIC REPLACEMENT OF THE SUBBIO CUP HOLDER IN WEAVING FRAMES |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0867545A1 true EP0867545A1 (en) | 1998-09-30 |
EP0867545B1 EP0867545B1 (en) | 2002-01-09 |
Family
ID=11376671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980105507 Expired - Lifetime EP0867545B1 (en) | 1997-03-27 | 1998-03-26 | Device for automatic replacement of the cloth beam in weaving looms |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0867545B1 (en) |
DE (1) | DE69803106T2 (en) |
IT (1) | IT1290492B1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0296114A1 (en) * | 1987-06-16 | 1988-12-21 | GebràDer Sulzer Aktiengesellschaft | Method for winding cloth beam in a transport device and transport device therefore in a weaving mill |
BE1000684A4 (en) * | 1987-06-29 | 1989-03-07 | Picanol Nv | Method of removing rolls of fabric from weaving machine - has empty wind-on bar pressed between roller and replaced bar against and trapping fabric which is then cut |
EP0438972A1 (en) * | 1990-01-24 | 1991-07-31 | GebràDer Sulzer Aktiengesellschaft | Cloth beam exchanger for looms |
EP0462636A1 (en) * | 1990-06-19 | 1991-12-27 | Picanol N.V. | Method and device for replacing a cloth beam in weaving machine |
-
1997
- 1997-03-27 IT IT97MI000727A patent/IT1290492B1/en active IP Right Grant
-
1998
- 1998-03-26 DE DE1998603106 patent/DE69803106T2/en not_active Expired - Fee Related
- 1998-03-26 EP EP19980105507 patent/EP0867545B1/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0296114A1 (en) * | 1987-06-16 | 1988-12-21 | GebràDer Sulzer Aktiengesellschaft | Method for winding cloth beam in a transport device and transport device therefore in a weaving mill |
BE1000684A4 (en) * | 1987-06-29 | 1989-03-07 | Picanol Nv | Method of removing rolls of fabric from weaving machine - has empty wind-on bar pressed between roller and replaced bar against and trapping fabric which is then cut |
EP0438972A1 (en) * | 1990-01-24 | 1991-07-31 | GebràDer Sulzer Aktiengesellschaft | Cloth beam exchanger for looms |
EP0462636A1 (en) * | 1990-06-19 | 1991-12-27 | Picanol N.V. | Method and device for replacing a cloth beam in weaving machine |
Also Published As
Publication number | Publication date |
---|---|
IT1290492B1 (en) | 1998-12-04 |
DE69803106D1 (en) | 2002-02-14 |
DE69803106T2 (en) | 2002-08-22 |
ITMI970727A1 (en) | 1998-09-27 |
EP0867545B1 (en) | 2002-01-09 |
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