Classifications

• • 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
  • D03D49/22—Back rests; Lease rods; Brest beams
• • 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

Definitions

• the invention relates to a method for setting a match tree and / or a warp guard device of a weaving machine, whose match tree and / or warp guard device is adjustably mounted on the machine frame and can be converted from an actual position into a respective predetermined desired position by means of associated actuating means and can be determined in this.
• the warp threads of the warp must be divided into an upper and a lower compartment for a weft insertion from the so-called binding point to the reed. This is done with shafts in dobby machines and with harness cords in jacquard machines.
• the resulting angles between the warp threads delimiting the shed are directly dependent on the position of the match tree and the stroke of the shafts (harnesses). These angles of the shed are important for weaving and also different for different fabrics. That usually means that with one
• an uncontrolled tensioning unit for the weaving chain of a weaving machine which basically shows how the tensioning unit containing a coating roller (match tree) is adjustably mounted on the weaving machine frame in the horizontal and vertical direction.
• the tensioning unit is mounted on both sides on two slide-like components, which are guided in a longitudinally displaceable manner on two guide parts, which in turn are pivotably mounted on the side cheeks of the weaving machine frame about a common horizontal axis. Together with corresponding elongated holes Acting clamping screws allow the tensioning unit and thus the coating roller to be positioned in the optimal target position for the tissue to be produced.
• the clamping unit is adjusted by hand.
• a weaving machine known from US Pat. No. 5,261,463 has already been equipped with a device for checking the correct adjustment of the tensioning unit for the weaving chain.
• the loom of the weaving machine is mounted on the machine frame on each side of the machine by means of two slide-like bearing parts that can be moved at right angles to one another, whereby clamping screws that extend through elongated holes allow the horizontal and vertical adjustable match tree to be moved into its respective desired position and into to determine this.
• the actuation of the clamping screws and the adjustment of the match tree from the actual position to the target position are done by hand.
• the slide-like bearing parts are assigned non-contact, optical sensors on each side of the machine, which determine the horizontal and vertical position of the match tree and deliver corresponding data to a control unit, where this data is stored and displayed on a screen.
• the operator can thus follow the setting process on the screen, the reaching of a predetermined target setting being indicated by light signals.
• the adjustment of the two-roller match tree remains time-consuming because a large number of clamping screws on each machine side have to be loosened by hand and must be tightened again by hand after the match tree has also been moved manually. The same applies, incidentally, also to the warp guard device, if there is one.
• the object of the invention is therefore to show a way that allows a quick and precise adjustment of the match tree and / or the warp guard device in a weaving machine.
• the method according to the invention has the features of claims 1 and 13, while a device according to the invention intended for carrying out this method is the subject of claim 14.
• the term “match tree” is not restricted to a single coating roller, but also includes those embodiments in which the function of the matching tree for tensioning and deflecting the weaving chain is divided into several rollers, which may be combined to form a tensioning unit, as illustrated, for example, in the aforementioned DE 195 38 121 Cl.
• the actuating means are assigned at least one controllable, driven actuating device which allows the necessary actuating movements to be generated, for example, in the horizontal and / or the vertical direction.
• the respective actuating function of the actuating means i.e. recognized whether they are used to generate adjustment movements in, for example, the horizontal or vertical direction.
• the existing actual position of the match tree and / or the warp guard device is determined. This actual position is automatically compared with a predetermined target position for the respective actuating function. From this comparison, an actuating signal required for moving the match beam and / or the warp guard device into the desired position is generated, which is fed to the actuating device.
• the adjusting device then actuates the adjusting means to the extent necessary for the adjustment.
• the match tree and / or the warp guard device are automatically positioned exactly in the respective target position.
• the match tree can be adjusted jointly or separately from that of the warp guard device if there is one in the weaving machine.
• a movable actuating device is generally used, which is detachably coupled to the individual actuating means and is uncoupled from the actuating means once the adjustment process has been completed.
• the arrangement can be such that the actuating device is designed as a movable actuating unit containing the drive, which can be detachably coupled to the actuating means of the respective actuating function.
• the actuating means can be assigned to the individual actuating functions, movably mounted
• Bearing parts for example, have slides, which are each adjustable via a self-locking gear and contain a threaded spindle as the actuating means.
• the drive unit connected to the weaving machine control is placed one after the other on the threaded spindles assigned to the individual adjusting functions. It recognizes the location and function of the spindles by means of a coding device.
• a non-contact measuring system on the control unit such as an ultrasonic sensor or a laser measuring device, determines the existing distance setting of the associated bearing part or slide using a fixed reflector or reflection level and transmits the corresponding data to the weaving machine control.
• the drive of the actuating device is automatically moved accordingly until the predefined setpoint value is reached.
• the vertical adjustment range for the match tree adjustment alone allows an adjustment of approx. 200 mm. It is therefore also necessary to be able to move the warp guard device accordingly.
• the self-locking gears and their actuating means designed as threaded spindles
• a total of four movably mounted bearing parts (slides) with associated threaded spindles result on each machine side.
• Two threaded spindles are used for vertical and horizontal adjustment of the match tree; the two remaining threaded spindles allow the warp monitor device to be adjusted vertically and horizontally.
• the invention allows a quick and accurate setup of the match tree and / or the warp guard device.
• the settings made can also be reproduced when the same article is rewoven.
• the settings of the match tree and / or the warp guard device during the weaving process i.e. can be easily changed during production to optimize the setting.
• Such a change in the setting of the match tree can also be used according to the invention to keep the geometry of the so-called back pocket lying between the heald frames and the match tree constantly independent of a winding diameter of the warp beam that changes during weaving hold.
• an optimal match position achieved by means of the actuating units of the match beam is stored in the control unit as a target value, and a change in the position of the match beam based on the decreasing warp beam winding diameter using means known per se as measurement actual. Capture values continuously, transmit these actual values to the control unit in a signal-transmitting manner and, within the framework of a Sohlst value comparison that is to be carried out continuously, maintain the change in position through ongoing or time-based readjustment of the target setting of the match tree.
• the control units of the horizontal and vertical slides are fixed with the
• Figure 1 is a schematic representation of the shed formation in a dobby loom illustrating three different settings of the match tree.
• FIG. 2 shows a detail from a weaving machine, illustrating the coating Baums with an adjusting device according to the invention, in a schematic sectional view;
• Fig. 3 shows a warp guard device with a one-piece device according to the invention, in a schematic sectional view and in detail and
• FIG. 4 shows the adjustment unit of the device for adjusting the match tree according to FIG. 2 or the warp guard device according to FIG. 3, in a schematic representation in the state placed on a threaded spindle of the adjusting means and on a different scale.
• FIG. 1 The basic structure of a weaving machine is illustrated schematically in FIG. 1.
• a weave indicated at 2 is passed over a match tree 3, through which the warp threads of the warp 2 are deflected approximately into a horizontal plane 4, which contains the fabric 5 produced.
• the warp threads 2a, 2b on the warp chain 2 run through strands 6 by which they are divided into an upper compartment 8 and a lower compartment 9 for a weft insertion from the binding point denoted by 7.
• the reed of this weaving machine is labeled 10.
• the weft insertion elements are not shown any further.
• the tissue 5 produced is a breast tree 11 and a
• match tree 3 which cooperates with a warp tension compensation device indicated at 14, is therefore associated in the area of its bearing points with setting means which allow the
• Match tree 3 to adjust in the horizontal direction and in the vertical direction, as indicated by arrows 15 and 16 respectively.
• a warp monitor device known per se, which extends over the width of the weaving machine and monitors the warp threads 2a, 2b of the warp chain 2 in the area between the match tree 3 and the shafts 6 for warp thread breakage. In the event of a warp thread breakage, it switches off the weaving machine. Since the warp guard device 17 must be in a predetermined assignment to the warp threads for its proper function, it is generally necessary to adjust the warp guard device 17 accordingly when the match tree 3 is adjusted. In the area of its bearing points on the machine frame, it is therefore also equipped with associated adjusting means, which will be explained in detail with reference to FIG. 3.
• the adjusting means allowing the adjustment of the match tree 3 can be seen in detail from FIG. 2, which shows the mounting of the match tree 3 and the associated adjusting means for a machine side.
• the match tree 3 is pivotally mounted on both machine sides by means of a bracket 18 about a horizontal shaft 19 which is accommodated at the end in bearing parts which are designed as horizontal slides 20 and can be moved in the horizontal direction indicated by the arrows 15, in each case on a vertical slide 21 are stored.
• the vertical slide 21 is guided in a vertically displaceable manner on the machine frame, indicated at 22 in sections, in accordance with the arrows 16.
• Angle levers 23 of the warp tension compensation device 14 are coupled in a rotationally fixed manner to the straps 18 carrying the match tree 3, on which tension springs 24 act, which allow the match tree 3 to perform an elastic warp tension compensation movement.
• the warp tension compensation device 14 is known per se and therefore need not be explained further.
• the horizontal and vertical slides 20, 21 forming part of the adjusting means can each be moved in the horizontal or vertical direction by assigned self-locking gears.
• these self-locking gears are designed as screw-spindle gears, of which only the actuating elements in the form of the threaded spindles 25, 26 are shown in FIG. 2.
• the threaded spindle 25 of the horizontal slide 20 is guided in the vertical slide 21 and engages in a spindle nut of the horizontal slide 20 indicated at 27.
• the threaded spindle 26 coupled at the end to the vertical slide 21 interacts with a spindle nut 28 (FIG. 3) arranged on the machine frame 22 and fixed to the frame.
• the vertical, fixed guides of the vertical slide 21 are at 30 in
• the threaded spindles 25, 26 assigned to the two actuating functions, namely the adjustment of the match tree 3 in the horizontal and vertical directions, are each actuated by an actuating device which has an electromotive drive and is designed as an actuating unit 30 which is shown in greater detail in Fig. 4 is illustrated.
• the actuating unit 30, which is designed as a movable unit, contains at its one end-side end a plug-in coupling device, indicated at 31, with its drive, with which it can be plugged onto a coupling extension 32 of the threaded spindle 25 or 26, for example with a polygonal cross section.
• the drive unit 30 can actuate the respectively coupled threaded spindle 25 or 26 for adjusting the match tree 3 or the warp guard device 17.
• Each of the threaded spindles 25, 26 is a bar code, for example
• Coding part 33 is permanently assigned, the coding of which is read by a code reader 34 arranged on the actuating unit 30 which is plugged onto the respective threaded spindle 25 or 26 and which is characteristic of the location and the actuating function of the threaded spindle.
• the coding device formed by the coding part 33 and the code reader 34 can thus automatically recognize the location and function of the respective threaded spindle.
• a contactless measuring system 35 in the form of, for example, an ultrasound sensor or a laser measuring device, is arranged on the housing of the actuating unit 30, based on a fixed reflector or reflection plane 36, which is attached to one by the threaded spindle 25 or 26 in a fixed spatial association to the associated horizontal or vertical slide 20 or 21 held reflector part 37, the existing one
• the control unit 30 is connected via control lines 39 or in each case a bus to an electronic control unit 38 of the weaving machine, which, when the control unit 30 is attached to the screw spindle 25 or 26, provides data about the location (right or left machine side, for example) and the control function of the respective threaded spindle, as well transmitted about the actual position of the slide 20 or 21.
• the corresponding setting values are compared with target values which are valid for the target position of the match tree 3, are predetermined by the operator or are transmitted via a data network.
• an actuating signal is generated which the control unit 38 transmits to the drive of the actuating unit 30, which rotates the threaded spindle 25 or 26 coupled to it in such a way that the slide 20 or 21 and thus the match tree 3 is in its desired position Position will be transferred.
• the position of the match beam and thus the geometry of the back pocket formed by the warp threads 2a, 2b changes as the warp beam winding diameter decreases.
• the changed entry of the warp threads from the match into the warp guard device 17 is also of considerable disadvantage because the slats 40 of the warp guard device are then stimulated to an increased, uncontrolled movement, which has a lasting negative effect on the stopping behavior of the weaving machine.
• the change in the match beam position caused by the weaving of the warp beam 1 is detected as an actual position by means of a measuring device 47 known per se and is supplied to the control unit 38 via the line 48 as an electrical signal representing the actual value. This actual value is continuously compared with the value representing the target position of the coating roller and subsequently necessary corrections are made to maintain the target position of the coating roller by means of the actuating units 30.
• FIG. 3 shows the setting of the warp guard device 17 via appropriate adjusting means.
• these adjusting means are constructed similarly to the adjusting means of the match tree 3 explained with reference to FIG. The same parts are therefore provided with the same reference numerals and are not explained again.
• the warp guard direction 17 is basically known in its structure and function (compare, for example, the book “Weaving” by Dipl.-Ing. J. Schneider, Springer Verlag 1961). It has the individual warp thread scanning lamellae 40, which are movably guided up and down on rails 41 and is arranged with a frame part 420 which is continuous over the weaving machine width on a swivel table 42 which is pivotably mounted on the horizontal slide 20 of the adjusting means about a horizontal axis 43 .
• a rotary drive 44 connected to the respective horizontal slide 20 is coupled to the swivel table 42 and allows it to be swiveled about the horizontal axis 43.
• the rotary drive 44 is connected to the control unit 38, from which it receives, depending on the respective setting of the match tree 3, control signals which cause it to
• Adjust swivel table 42 in such a way that the slats 40 of the warp thread monitor device 17 assume the correct angular position with respect to the warp threads 2a, 2b of the warp 2 that they monitor.
• Embodiment is formed in the form of an actuator fixedly connected to the horizontal slide 20, embodiments are also conceivable in which the slide-fixed rotary drive 44 is replaced by the movable actuator 30.
• the pinion shaft 45 forming the actuating means of the self-locking swivel gear 46 designed as a worm gear for the swivel table 42 is provided with a coupling attachment 32 (FIG. 4) which allows the actuating unit 30 to be plugged on.
• the actuating unit 30 connected to the control unit 38 is successively placed on the individual threaded spindles 25, 26 or the pinion shaft 45 so as to prevent rotation.
• Your code reader 34 recognizes, via the associated coding on the respective code part 33, the location and the setting function of the respective threaded spindle or the pinion shaft 45.
• the setting unit 30 receives from the control unit 38 those for reaching it the required control signals required in each case.
• the adjusting means for the match tree 3 and / or the warp guard device 17 do not necessarily have to have carriages 20 and 21 that can be moved in the horizontal and vertical directions.
• the idea according to the invention can also be used in the same way for those weaving machines in which the match tree on the machine frame is adjustable in another way, for example pivotably mounted, as is the case in DE
• the coding device 33/34 can optionally be dispensed with if it is ensured in another way that the control unit 38 knows which actuating function the actuating unit 30 is currently assigned to.
• Control unit 38 can be optimally adjusted, for example with regard to warp thread breaks.
• the two threaded spindles 25 for the horizontal adjustment of the match tree 3 and / or the warp guard device 17 are assigned two actuating units 30 in order to appropriately adjust the warp tension by appropriately adjusting the match tree 3 when the weaving machine is stopped or when it is restarted.
• the actuating means of the match tree 3 and / or the warp guard device 17 can also have, in addition to the actuating functions described, further actuating functions, for example for adjusting the pretension of the match tree 3 via the tension compensation device 14.
• the invention allows a quick and accurate setup of the match tree 3 and the warp guard device 17 when changing articles.
• the settings can also be reproduced when the same article is rewoven.
• a radio-controlled robot carriage for example, which carries at least one actuating unit 30.
• this robot carriage moves to the loom under floor control and automatically takes, in accordance with the article data transmitted to the loom via a network (for example the Dostyle system developed by the applicant), the required setting of the match tree 3 and the warp guard device 17, at least for the each associated left and right actuators, automatically.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Looms (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)
• Lock And Its Accessories (AREA)

Applications Claiming Priority (3)

Publications (2)

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Family Applications (1)

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• 1997
  • 1997-09-13 DE DE19740309A patent/DE19740309A1/de not_active Ceased
• 1998
  • 1998-09-04 EP EP98951270A patent/EP0944752B1/fr not_active Expired - Lifetime
  • 1998-09-04 ES ES98951270T patent/ES2219914T3/es not_active Expired - Lifetime
  • 1998-09-04 AT AT98951270T patent/ATE264415T1/de not_active IP Right Cessation
  • 1998-09-04 JP JP51728199A patent/JP3481258B2/ja not_active Expired - Fee Related
  • 1998-09-04 WO PCT/DE1998/002610 patent/WO1999014410A2/fr not_active Ceased
  • 1998-09-04 US US09/308,068 patent/US6135162A/en not_active Expired - Fee Related
  • 1998-09-04 PT PT98951270T patent/PT944752E/pt unknown
  • 1998-09-04 DE DE59811197T patent/DE59811197D1/de not_active Expired - Fee Related

Non-Patent Citations (1)

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