Classifications

• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
  • D03C3/00—Jacquards
  • D03C3/10—Centre-shed jacquards
• • 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
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
  • D03D49/04—Control of the tension in warp or cloth
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
  • D03D49/04—Control of the tension in warp or cloth
  • D03D49/12—Controlling warp tension by means other than let-off mechanisms
  • D03D49/14—Compensating for tension differences during shedding
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
  • D03D51/18—Automatic stop motions
  • D03D51/20—Warp stop motions
  • D03D51/28—Warp stop motions electrical
  • D03D51/30—Warp stop motions electrical wherein droppers are suspended on individual warp threads or small groups of threads

Definitions

• the invention relates to a weaving machine according to the preamble of claim 1.
• a loom of the type mentioned is known from WO 99/13145.
• the weaving machine contains a warp thread tensioning device and a shed forming device that has warp threads that are prestressed in a first shed position.
• An oscillatingly drivable lifting device is equipped with drivers for the warp threads, with actuators which can be actuated by means of actuators being present in order to selectively engage the warp threads with the drivers which move the warp threads into a second compartment position. It is disadvantageous that in this weaving machine the lifting device equipped with the carriers has to move the entire path of the warp threads from the first compartment position to the second compartment position. The lifting device must therefore travel a relatively long way, which is time-consuming on the one hand and on the other hand requires higher driving forces.
• the object of the invention is to improve a loom of the type mentioned.
• the characterizing features of claim 1 Because the loom is a common for all warp threads has a second lifting device, which moves the warp threads from the first position into a switching position effective for the first lifting device, results in a very simple second lifting device for all warp threads, which moreover significantly reduces the switching path for the first lifting device, so that the first lifting device only one warp thread must still move from the switch position to the second compartment position. Both lifting devices only have to follow a limited route, for which they take less time. Since the lifting devices can also operate simultaneously, there is a significant increase in the performance of the weaving machine. Incidentally, this training also improves the service life due to the lower susceptibility to wear. The weaving machine also results in lower noise emissions.
• the second lifting device can be a lifting beam that extends over all the warp threads.
• the stroke of the second lifting device can be very different, it is advantageous if it executes at least half of the stroke of the warp threads in the shed according to claim 3.
• the first lifting device for each warp thread has a control lamella with a driver slot and an associated, preferably hook-shaped driver for the associated warp thread.
• the warp thread can be selectively brought into engagement with the driver by means of a control slat which can be switched by the actuator.
• the driving slot is assigned to the sliding path of the driving element and is guided in the switching area via a control slot extending obliquely to the sliding direction of the driving element out of the sliding path of the driving element into an expanded guide slot of the control plate.
• the guide slot is provided with a run-up side according to claim 6.
• control lamella can be designed as a sheet steel strip.
• the embodiment according to claim 7 is advantageous, according to which the control lamella is formed in the form of a sleeve with two side walls, between which the driver is displaceably mounted. This ensures that the warp thread is guided safely from and to the driver.
• at least the guide slot and the control slot in both side walls of the control lamella are mutually offset in the running direction of the warp thread in such a way that a deflection of the running warp thread in the control lamella is less than 90 ° is preferably 10 °.
• the warp thread tensioning device has an individual thread tensioner for each warp thread on the entry side of the warp threads to the shedding device. As a result, the tension of the individual warp thread can be adjusted more subtly to the respective position of the warp thread in the shed.
• the weaving machine can have the usual additional thread monitors. However, it is more advantageous if the thread tensioner is also designed as a warp thread monitor.
• each warp thread is guided over two spaced-apart guide elements, between which the thread tensioner acting on the warp thread is arranged, which exerts a pretension on the warp thread.
• the pretension can be generated by a tension weight.
• the embodiment according to claim 14, according to which the pretension is generated by a tension spring, is more advantageous. In particular, this also enables the thread tensioner to be arranged in a position deviating from the vertical.
• each thread tensioner can be provided with a closed eyelet.
• each thread tensioner has a lateral insertion eye for the warp thread.
• each thread tensioner is provided with a guide opening, by means of which it is slidably mounted on a holder in the tensioning direction.
• the thread tensioner is expediently provided with a handle part in the direction opposite to the pretensioning direction, which preferably has a signal part protruding from the direction of displacement.
• a signal part can be, for example, a protruding head part of the thread tensioner. This makes it easier to identify a thread tensioner on which a thread error has occurred, since it stands out from the plane of the thread tensioner working properly.
• the thread tensioner is arranged on a holder which has a central contact part projecting on one side, which is insulated and embedded in lateral contact parts interacting with the sides of the guide opening of the thread tensioner. If the warp thread tension is faulty, the contact parts come into contact with an end face of the guide opening, which bridges the contacts and thus triggers an error signal.
• the thread tensioner can be used on a wide variety of weaving machines. However, it is preferably in a weaving machine according to claim 18 in use, in which the warp thread tensioning device has a control device which is connected to the drive of a goods take-off in order to control the warp beam in such a way that the warp threads are all under a predeterminable tensioning force.
• the retention force can be generated by a brake device on the warp let-off.
• an embodiment according to claim 19 is more advantageous, according to which the warp beam is provided with its own drive which contains a self-locking transmission in order to generate the retaining force.
• the warp thread tensioning device can be further improved by the embodiment according to claim 20, according to which it has a match tree prestressed by means of a tension spring device for the warp threads.
• the tension spring device is connected to the control device, so that the drives of the warp beam and the take-off can be controlled in such a way that the predeterminable tension force is maintained on the match beam.
• Various variants are conceivable for the design of the tension spring device.
• the embodiment according to claim 21 is particularly advantageous, according to which the tension spring device has a leaf spring with a bending transducer, which delivers corresponding control signals to the control device.
• the warp thread tensioning device can be designed with a safety device that is operatively connected to the match tree and contains an emergency switch that responds when the force of the warp threads occurring in the match tree is greater than the set tension force by a definable safety amount.
• Figure 1 shows the schematic of a weaving machine in side view
• Figure 2 shows a section of the shedding device of the weaving machine
• Figure 1 on a larger scale
• Figure 3 shows the shedding device of Figure 2 in section IH-III
• FIGS. 4-8 different working stages of the shedding device of FIG. 2;
• Figure 9 shows the schematic of another weaving machine with individual thread tensioners in side view;
• Figure 10 shows the thread tensioner of the weaving machine according to Figure 9 in large
• FIG. 11 shows a section of the device according to FIG. 10.
• FIG. 1 schematically shows a weaving machine which generally has a warp let 2, which is designed, for example, as a warp beam, from which warp threads 4
• a control device 26 is used to control the weaving machine.
• the weaving machine is provided with a thread tensioning device, which primarily contains the take-off 24, the drive 28 thereof by means of the control device
• the retention force of the warp let-down can be generated by a braking device 29 or a separate drive, in which a motor is connected to the warp let-down by a self-locking gear.
• 25 direction additionally contains for each warp thread 4 an individual warp thread tensioner 8, which is arranged between two guide elements 30 and, in the example shown, individually biases the warp thread 4 running through an eyelet 34 by means of a biasing spring 32.
• the warp threads 4 are between a deflection roller 36 and a goods holder 22, which is also designed as a spreader can, biased into a first position F 1 .
• a first lifting device 38 which has drivers 40, which can be moved by means of a lifting beam 42 from a switching position F 2 into the second specialist position F 3, is used for the individual control of the warp threads 4.
• control means 46 that can be controlled by actuators 44, the warp threads 4 can be selectively engaged with the drivers 40 when the warp threads have been moved from the first specialist position Fi into the switching position F 2 by means of a common second lifting device 48, as shown in FIGS Figures 1 to 8 can be seen in detail.
• the control means 46 contain control lamellae 50, which are prestressed by means of a prestressing spring 52 against a walking beam 54, against which they abut via a stop 56.
• the actuators 44 contain hook parts 58 which cooperate with hook parts 60 on the control plates 50 and hold the control plate 50 in the raised position in the activated state.
• An actuator 44 which is not activated releases the displacement path of the control lamella 50.
• each control lamella 50 is symbolized on the basis of its switching travel, as is shown in detail on the basis of FIGS. 2 to 8.
• the control slats contain a driver slot 62 which lies in the displacement path of the warp thread 2.
• a control slot 64 adjoins the driver slot upwards, which guides the warp thread out of the displacement path of the driver into an enlarged guide slot 66, so that the driver 40 can no longer catch it.
• the control lamella is sleeve-shaped and has side walls 68, 70 which are connected by end walls 72, 74 and thus create a cavity in which the driver 40 is displaceably mounted.
• the driver slots 62a and 62b are arranged offset in the side walls 68, 70 in the running direction of the thread in such a way that the warp thread is inclined at an angle ⁇ from the vertical to the control plate when passing through the control plate, which angle is less than 90 °, preferably 40 ° is in order to keep the volume resistance of the warp thread through the control lamella and thus the wear of the warp thread on the one hand and the control lamella on the other hand as small as possible.
• the function of the shedding device is shown in more detail with reference to FIG. 1 in conjunction with FIGS. 2 to 8. If the control lamella is in the raised position in which it is held on the actuator, as can be seen in FIG. 1 for the right-hand actuator and in FIGS. 2, 4 and 5, the warp thread is moved out of the guide slot 66 by means of the second lifting device 40 an inclined run-up side 76 is guided into the control slot 64 and by means of the latter into the driving slot 62, in which the warp thread lies in the displacement path of the driving device 40. During the downward movement of the driver 40, the warp thread 4 is carried by the hook 40a of the driver 40 from the switching position F 2 into the second compartment position F 3 , which is the low compartment position. As long as the control lamella 50 remains in the raised state, the warp thread 4 is only moved back and forth by the height H1 between the switch position F 2 and the low position F 3 , as can be seen from FIGS. 2 and 4 to 6.
• the warp thread gets into the enlarged guide slot 66 via the control slot 64 during the upward movement of the driver 40 and thus outside the displacement path of the driver 40.
• the warp thread then comes again, as can be seen from FIGS. 7 and 8, into the displacement path of the second lifting device 48 and is moved over the height H2 from the switching position into the first specialist position Fi, which is the high specialist position.
• FIG. 9 shows a weaving machine with a special design of the warp thread tensioning device and the thread tensioner, which for example can have a shedding device according to the weaving machine of FIG. 1.
• the weaving machine contains a warp beam 2a, from which warp threads 4 are guided via a match beam 6a to individual thread tensioners 8a, which are arranged in front of a shedding device 12a.
• the shedding device 12a can be configured analogously to the shedding device 12 of the weaving machine of FIG. 1, but can also have other designs.
• the product web 20 that is generated is fed via a product deduction 24a deducted and wound on a fabric 80.
• the weaving machine contains a control device 26a, which is designed in particular for controlling the warp thread tensioning device.
• the warp beam 2a is actuated by a drive 82 which has a self-locking gear 84.
• the drive is controlled by the control device 26a as a function of the drive 28a of the goods take-off 24a and a tension spring device 86, with which the match tree 6a abuts the warp threads 4.
• the control is such that the goods take-off 24a is set as a function of the retaining force of the drive 82 of the warp beam 2a in such a way that a predetermined tensioning force can be maintained on the match beam 6a.
• the warp beam 6a is fastened to a rocker arm 88 which is supported by a support device 90 on a leaf spring 92 which is provided with a bending transducer 94 which transmits its data to the control device 26a.
• the support device 90 comprises a safety device 96 which contains a screw bolt 98, the head 100 of which is arranged displaceably in a holding bell 102.
• the holding bell 102 is connected to the rocker 88.
• the head 100 is supported on a stop 104 of the holding bell.
• a biasing spring 106 arranged outside of the holding bell 102 is supported on the one hand by an adjusting screw 108 on the screw bolt 98 and on the other hand by a washer 110 on the holding bell 102, so that the head 100 rests with a corresponding biasing force on the stop 104 of the holding bell 102.
• the bolt 98 is further connected to the leaf spring 92. If a tensioning force now occurs on the match tree 6a that is greater than the tensioning force set as permissible on the leaf spring 92, the biasing spring 106 is compressed and the holding bell 102 moves on the screw bolt 98, as a result of which a switch 112 connected to the holding bell 102 is closed and outputs an error signal to the control device 26a.
• FIGs 10 and 11 show in detail the design of the thread tensioner 8a, which are also designed as a thread monitor.
• the thread tensioner 8a are designed as lamellae and each have a guide opening 114, by means of which they are mounted on a holder 116 so that they can move in the tensioning direction.
• the holders have a central contact part 118 which projects on one side and is embedded in isolation in lateral contact parts 120. The latter are connected to the sides of the guide opening. If the warp tension is defective, the thread tensioners 8a are displaced by means of the biasing spring 32a until the contact parts 118, 120 of the holder 116 are in contact with an end face 124 of the guide opening 114 and trigger an error message.
• the thread tensioners each lie between two guide elements 30a for the warp thread 4, which is attached to the thread tensioners 8a via retractable eyelets 34a.
• the thread tensioners On the side facing away from the biasing spring 32a, the thread tensioners each contain a handle part 126 with a signal part 128 which protrudes from the displacement plane of the thread tensioners, so that thread tensioners can be recognized which indicate a broken warp thread and for this reason are no longer in alignment with the other signal parts 128 Hegen.
• the signal part 128 is formed by a head part protruding from the displacement plane.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Looms (AREA)
• Woven Fabrics (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=33546146

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• 2004
  • 2004-05-28 TW TW093115192A patent/TWI303679B/zh not_active IP Right Cessation
  • 2004-06-03 CN CN2004800163944A patent/CN1806072B/zh not_active Expired - Fee Related
  • 2004-06-03 EP EP04735865A patent/EP1631712B1/fr not_active Expired - Lifetime
  • 2004-06-03 AT AT04735865T patent/ATE389740T1/de not_active IP Right Cessation
  • 2004-06-03 KR KR1020057023587A patent/KR100760441B1/ko not_active IP Right Cessation
  • 2004-06-03 JP JP2006515621A patent/JP4276676B2/ja not_active Expired - Fee Related
  • 2004-06-03 US US10/559,948 patent/US7320343B2/en not_active Expired - Fee Related
  • 2004-06-03 WO PCT/CH2004/000337 patent/WO2004111321A1/fr active IP Right Grant
  • 2004-06-03 ES ES04735865T patent/ES2299836T3/es not_active Expired - Lifetime
  • 2004-06-03 BR BRPI0411345-4A patent/BRPI0411345A/pt not_active IP Right Cessation
  • 2004-06-03 DE DE502004006588T patent/DE502004006588D1/de not_active Expired - Fee Related
• 2006
  • 2006-09-04 HK HK06109814.9A patent/HK1089487A1/xx not_active IP Right Cessation

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