• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method and apparatus for determining the diameter of the warp beam in a loom including a warp unwinding motor for its rotation of a warp beam, independently and a winding motor of the warp. chain for the rotation of a winding beam of the fabric, independently. The method encompasses the steps before the loom begins to weave; detect chain tensions; calculating the variation of the chain tension from the chain tensions; and calculating the diameter of the chain beam based on the change in the chain intent.
    公开号:BE1019644A3
    申请号:E201000263
    申请日:2010-04-27
    公开日:2012-09-04
    发明作者:
    申请人:Toyota Jidoshokki Kk；
    IPC主号:
    专利说明:

    / / / ^
    Method and apparatus for determining the diameter of the warp beam in a loom.
    The present invention relates to a method and apparatus for determining the diameter of the warp beam in a loom.
    To maintain a given warp tension in a loom, the loom chain unwinding motor is driven at a rotational speed which is calculated as a function of the warp beam diameter for the warp distribution. . Since the warp beam diameter changes when the warp beam is replaced by a new one in a mounting operation, and also when the amount of warp on the warp beam decreases as a function of the warp beam. Weaving operation of the loom, it is difficult to determine the diameter of the warp beam mechanically. Thus, in reality, the diameter of the chain is often determined using alternative means.
    Japanese Unexamined Patent Publication No. 10-60753 discloses a method for determining the diameter of a pile warp beam and a method for determining the diameter of the lower warp haft. These processes are based on a fundamental idea that we will develop further below.
    When the loom is working, the pile chain haul is driven by the chain unwinding motor. A roller provided downstream of the pile warp beam, when looking in the distribution direction of the chain, is rotated as the distribution of the chain. A proximity switch is disposed adjacent to the running path of a sensed element which rotates integrally with the roller. The path followed by the detected element falls within the detection range of the proximity switch. The proximity switch at a position opposite the sensed element sends an ON signal to the controller. The controller calculates the diameter of the pile warp beam based on the signal from the proximity switch.
    In the above method of the conventional technique, the diameter of the warp wearer, which varies proportionally with the decrease in the amount of the warp on the warp wearer as the progress of the warp is increased. Work performed by the loom is calculated based on the signal representing the rotation of the roll. In such a process, the loom must be put into operation for a given period of time, so that the diameter of the new warp beam can not be calculated before starting the loom. In general, when replacing the chain coupling with a new one, the diameter of the new warp beam is entered manually as an initial value into the control device by the weaving machine operator.
    However, in the manual entry process, an erroneous diameter may be entered or the entry of the initial value may be negligently implemented. The term "negligence" is used to generally indicate that the diameter of the preceding chain is used, which has been set in the control device prior to replacement of the chain halftone. And even if the diameter of the new warp beam is entered according to the weaving specification, the actual diameter of the new warp beam may be different from that which corresponds to the weaving specifications for some reasons.
    In either case, when the loom is restarted after the mounting operation, the diameter of the warp wearer, different from the actual diameter, is used to calculate the rotational speed of the motor. course of the chain. In this way, an irregular increase or decrease in the tension of the warp can be obtained just after the start of the loom, which prevents an adequate weaving operation of the loom.
    The present invention relates to providing a method and apparatus for accurately determining the diameter of the warp wearer in correspondence with the actual diameter.
    SUMMARY OF THE INVENTION
    In accordance with one aspect of the present invention, a method and apparatus for determining the diameter of the warp wearer is used in a loom including a chain unwind motor to independently rotate a warp beam. and a winding motor of the chain for rotating a bobbin winding the fabric, independently. The method includes the steps of driving the chain unwinding motor and the chain winding motor before the loom begins its weaving operation, detecting warp tensions at intervals of time while the chain unwinding motor and the chain winding motor are driven, calculating the variation of the chain tension from the chain tensions and calculating the diameter of the chain. the warp beam based on the variation of the warp tension.
    Other aspects and advantages of the invention will become apparent from the following description which is taken in conjunction with the accompanying drawings, which illustrate by way of example the principles of the invention.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Fig. 1 is a schematic view of a loom, in which the method for determining the diameter of the chain knot according to the embodiments of the present invention is carried out; Fig. 2 is a diagram showing the relationship between a deviation of the calculated diameter of the warp wearer from the actual warp beam diameter and the change in warp tension; Figure 3 is a timing diagram of a chain unwinding motor, a chain winding motor and the warp tension of the loom of Figure 1; and Fig. 4 is a timing chart according to a second embodiment of the present invention.
    DETAILED DESCRIPTION OF THE FORMS OF REALIZATION
    FAVORITE
    Referring to Figure 1, a loom drive motor 1, a bidirectional chain unwind motor 3 and a bidirectional winding motor of the chain 14 are operated under control of a controller 2. The unwinding motor of the chain 3 is provided separately with respect to the drive motor of the weaving loom 1 and drives a warp beam 4 so as to allow the unfolding of the chain 4A and its distribution from 1 ' chain warp 4. The warp 4A is guided through a wire roll 5 and through a tensioning roller 6, and is threaded through the rails 7 and a comb of the wing 8. The weft (not shown) is inserted at through a crowd formed between the sheets of the chain 4A to weave a fabric 13A. The fabric 13A is guided through an expansion bar 9, a contact roller 10, a pressure roller 11 and a guide 12 to be wound on a winding beam of the fabric 13. The contact roller 10 and the winding hawthorn of the fabric 13 are driven by the winding motor of the chain 14 which is provided separately with respect to the drive motor 1 of the loom.
    The tensioning roller 6 is supported at one end of a tension lever 15 and imparts a tension to the chain 4A via an elastic force of an extension spring 17 which is mounted on an arm 16 which extends from the other end of the tension lever 15. The tension lever 15 is rotatably supported on an arm 19 which extends from the other end of a detection lever 18 and the other end of the detection lever 18 is coupled to a dynamometer 20. The tension of the chain 4A is transmitted via the tensioning roller 6, the tension lever 15 and the detection lever 18 to the dynamometer 20. The dynamometer 20 sends an electrical signal (detection signal) to the dynamometer 20. control device 2, depending on the tension of the chain. The tensioning roller 6, the tensioning lever 15, the detection lever 18 and the dynamometer 20 cooperate to detect the tension of the chain.
    The loom is provided with a control panel 21 having different switches such as an input switch 22 for entering the various weaving conditions including the type of fabric and its corresponding warp tension, a start switch 23 , a pulse switch 23 for forward 24, a pulse switch 25 for reverse, a stop switch 26, a drive switch 27 for driving the unwinding motor of the chain 3, and a switch drive 28 for driving the winding motor of the chain 14. These switches are electrically connected to the control device 2. The control device 2 is also connected to a rotary encoder 29 provided in the drive system of the loom to detect the rotation angle of the loom, a transformer 30 provided on the rotating shaft of the chain unwinding motor 3 to detect the ang the rotation of the unwinding motor of the chain 3 and a transformer 31 provided on the rotary shaft of the winding motor of the chain 14 to detect the rotation angle of the winding motor of the chain 14.
    Although in the present embodiment, the single control device 2 is used to control the operation of the loom drive motor 1, the chain unwind motor 3, the chain winding motor. 14 as well as other mechanisms such as the shedding mechanism, each of said motors and said mechanisms can have its own control device which is connected and which is controlled by the control device 2, as a control device host.
    In order to be able to actuate the loom, the control device 2 sends drive signals to the drive motor 1 of the loom, to the unwinding motor of the chain 3 and to the winding motor of the chain 14. When the loom is operational, the control device 2 receives detection signals that are emitted by the rotary encoder 29, the dynamometer 20, the transformer 30 of the unwinding motor of the chain 3 and the transformer 31 of the The control device 2 sends drive signals to the unwinding motor of the chain 3 and to the winding motor of the chain 14 so that the tension of the chain, which is calculated by the signal sent by the dynamometer 20, coincides with a predetermined target voltage.
    Although not shown in the drawings, the controller 2 includes a calculator, memory capacity and an input and output interface. When a new fabric is to be made, the loom is adjusted so that the chain doubling 4 is replaced by a new one, while the chain 4A is threaded onto the new warp beam 4. Then a signal Completion of the adjustment is sent to the controller 2, for example by actuating an adjustment completion switch 32 provided on the control panel 21. In addition, the weaving conditions for the new fabric are entered on a display screen. input which is turned on by operating the input switch 22 on the control panel, and is stored via the input and output interface in the memory of the controller 2.
    Hereinafter, the method for the determination of the diameter of the warp doublet is described when the chain weft 4 has been replaced by a new one, with reference to Figures 2 and 3.
    FIG. 2 shows the relationship between a deviation of the calculated diameter of the warp beam relative to the actual diameter and the variation of the warp tension. The relationship data for the warp yarns, which is used in the first embodiment shown in FIG. 2, has been obtained by experiment, and represents the basic idea of the present invention. Although the variation with respect to the actual voltage of the chain depends on the type of string to be used, said relation can be represented in general as shown in FIG. 2, whatever the type of string.
    As shown by the diagram in FIG. 2, in which the actual diameter of the warp beam 4 is set to act as a reference point or zero point, the calculated diameter of the warp beam deviates, in a positively or in a negative sense, relative to the reference point. The curve P, which is represented by a solid line, indicates the variation of the tension of the chain when the chain 4A is distributed via the forward rotation of the chain unwinding motor 3 and the chain winding motor 14 at a rotational speed which is calculated from the calculated diameter of the warp beam, with a positive or negative deviation. In the curve P, when the calculated diameter indicates a negative deviation, the variation of the tension of the chain undergoes a negative deviation from the reference point by following a quadratic curve. On the other hand, when the calculated diameter is deflected in the positive direction, the variation of the chain tension shows a positive deviation from the reference point by following a quadratic curve.
    The curve R, which is indicated by a dotted line, represents the variation of the tension of the chain when the chain 4A is rewound by the reverse rotation of the unwinding motor of the chain 3 and the winding motor of the chain 14 at a rotational speed which is calculated from the calculated diameter of the chain end, with a positive or negative deviation. In the curve R, when the calculated diameter indicates a negative deviation, the variation of the tension of the chain undergoes a positive deviation from the reference point by following a quadratic curve. On the other hand, when the calculated diameter is deflected in the positive direction, the variation of the chain tension shows a negative deviation from the reference point by following a quadratic curve.
    Thus, it is determined whether the calculated diameter of the warp doublet deviates from the actual diameter of the warp wearer by verifying the variation of the warp tension.
    Specifically, when the variation of the warp tension indicates a deflection in the positive direction or the negative direction from the reference point, the actual calculated diameter is corrected based on a deviation of the current calculated diameter from to the real diameter. The deviation is calculated in relation to the variation of the tension of the chain. Then, the speed of rotation of the unwinding motor of the chain 3 and the winding motor of the chain 14 is recalculated using the corrected diameter, and the unwinding motor of the chain 3 and the winding motor of the chain 14 are driven at the newly calculated speed to dispense the chain 4A or to wind the tissue 13Δ. When the variation of the tension of the warp becomes zero during such a process, the calculated diameter coincides with the actual diameter of the warp weft 4.
    However, it is not efficient to repeat the forward or reverse rotation of the motors 3 and 14 as long as the variation of the chain tension is not exactly equal to zero. According to the present embodiment, it is determined that the calculated diameter substantially coincides with the actual diameter as the variation of the warp tension falls within a predetermined permissible range A about the reference point.
    FIG. 3 shows a chronogram of the unwinding motor of the chain 3, the winding motor of the chain 14 and the tension of the chain. A correspondence is established between the deviation of the calculated diameter of the warp beam and the variation of the warp tension, as shown in FIG. 2, and this mapping is memorized in the control device 2 in the form of a program. The chain size is calculated according to the program after detecting the change in the chain tension.
    After the replacement of the chain doublet 4, the completion signal of the setting is entered in the control device 2 automatically or manually by operating the adjustment completion switch 32. unwinding of the chain 3 and the winding motor of the chain 14 are driven by the control device 2 forward for a given period of time TO in the first operation. In this case, since the diameter of the new warp beam 4 has not yet been recognized by the control device 2, the motors 3 and 14 are driven at the rotational speed calculated from the diameter of 1 '. previous warp beam which has been memorized before replacement of the warp doublet 4.
    The unwinding motor of the chain 3 and the winding motor of the chain 14 are started by driving them at a relatively low speed for an initial period of time T1. The rotation speed of the motor is switched by means of a switching mechanism. H1 at a relatively high control speed, calculated from the previous diameter of the chain link that was stored before the replacement of the chain weft 4. After the lapse of the time T0, the motor is stopped. unwinding of the chain 3 and the winding motor of the chain 14. A voltage detection signal in the first operation, which is shown by way of example in FIG. 3, is received by the control device 2 and stored in this last. According to the diagram of FIG. 2, the variation of the tension of the chain is deflected in the positive direction in the curve P when the calculated diameter deviates in the positive direction relative to the real diameter. Thus, the variation of the warp tension in the first operation, as shown in FIG. 3, indicates that the diameter of the warp wearer (calculated diameter of the warp wearer), which was used to calculate the speed of control rotation in the control device 2, is greater than the actual diameter.
    During the period immediately following the start of the motors 3 and 14, the tension of the chain is unstable and tends to decrease significantly because, for example, of the lengthening of the chain 4A. The tension of the chain stabilizes once the time T1 has elapsed. In the first operation, the chain unwinding motor 3 and the chain winding motor 14 are driven at the rotational speed calculated from the diameter of the warp beam which is larger than the actual diameter. In this case, the amount of the chain 4A to be dispensed is minimal, so that the tension of the chain increases to a constant extent after stabilization of the tension of the chain.
    The tension of the steady state chain is detected by the control device 2. Specifically, after the lapse of the time period T2, from the moment when the speed of rotation of the motor is switched to the speed of the control rotation 2, the control device 2 receives, at the point H2, a signal for detecting the tension of the chain emitted by the dynamometer 20. Then, the control device 2, once the time lapse T3 is reached. has elapsed, receives, at the point H3, a signal of detection of the tension of the chain emitted by the dynamometer 20. The control device 2 calculates the variation of the tension of the chain WT1 based on the difference between the tensions of the chain at the points H2 and H3, and determines whether the variation of the tension of the chain WT1 falls within the admissible range A. As can be seen from FIGS. 2 and 3, since the variation of the tension of the chain WT1 does not fall within the permissible range A, a correction value obtained from the variation of the tension of the chain WT1, is added to the actual calculated diameter in the first operation, and a newly obtained diameter of the The warp beam is stored in the control device 2. Specifically, a plurality of correction values which are proportional to the variation of the warp tension are previously stored in the control device 2, and a correction value which depends on the variation of the tension of the chain WT1 is extracted by reading and is used for the calculation of the diameter of the warp beam.
    After the first drive operation of the chain unwinding motor 3 and the chain winding motor 14 in their forward rotation, the controller 2 calculates a new control rotation speed based on the new warp beam diameter calculated after the first operation and then drives the chain unwinding motor 3 and the chain winding motor 14 in the reverse direction, the new control rotation speed during the lapse of time TO in the second operation.
    Also, in the second operation, the rotational speed of the motor is small for the initial time period T1 and switches to the control rotation speed at the point H1 from which the chain tension becomes stable. As was the case in the first operation, after the lapse of the time periods T2 and T3, the control device 2 determines the chain voltages at the points H2 and H3, respectively via detection signals emitted by the dynamometer 20. In the second operation, the tension of the chain decreases, as shown in FIG. 3. In accordance with the diagram of FIG. 2, the variation of the tension of the chain undergoes a deflection in the negative direction in the curve R when the diameter calculated deviates positively with respect to the actual diameter. Thus, the variation of the tension of the chain in the second operation, as shown in FIG. 3, represents the fact that the calculated diameter is greater than the actual diameter, but that the absolute variation of the tension of the chain is ie the difference between the actual diameter and the calculated diameter, decreases. The controller 2 calculates the variation of the voltage of the chain WT2 based on the difference between the chain voltages at the points H2 and H3, and determines whether the variation of the voltage of the chain WT2 falls within the permissible range A. Also, in the second operation, since the variation of the tension of the chain does not fall within the permissible range A, a correction value which is obtained from the variation of the tension of the WT2 chain, is added to the previous diameter calculated after the first operation, and the newly obtained diameter of the warp is stored in the control device 2. Specifically, since the variation of the voltage of the WT2 string is less than the variation of the string voltage WT1, a correction value which is smaller than the previous correction value is read out and is added to the diameter be calculated previously.
    In a manner similar to that indicated above, the control device 2 drives the unwinding motor of the chain 3 and the winding motor of the chain 14 forwards in the third operation so to detect the variation of the voltage of the WT3 chain (as can be seen in Figure 3). Since the variation of the tension of the chain WT3 does not fall within the permissible range A, the control device 2 drives the motors 3 and 14 in the opposite direction, in the fourth operation. According to the diagram of FIG. 2, since the variation of the tension of the chain undergoes a deflection in the negative direction in the curve P when the calculated diameter deviates negatively with respect to the real diameter, the variation of the tension of the chain in the third operation in Figure 3 represents the fact that the calculated diameter is smaller than the actual diameter. Thus, a correction value which depends on the variation of the warp tension WT3 is added to the calculated diameter in the third operation, and the newly obtained diameter of the warp is memorized for the next operation. As shown in FIG. 3, the absolute variation of the tension of the chain undergoes a progressive reduction towards the fourth operation, that is to say that WT1> WT2> WT3> WT4.
    If the control device 2 determines that the variation of the tension of the chain WT4 falls within the permissible range A, the control device 2 stops the actuation of the unwinding motor of the chain 3 and the motor 14 for unwinding the chain. . If, on the other hand, it is determined that the variation of the tension of the chain WT4 does not fall within the permissible range A, the control device 2 drives the motors 3 and 14 alternately forwards and backwards until the variation of the voltage falls within the permissible range A. This means that the step of driving the unwinding motor of the chain 3 and of the winding motor of the chain 14 is implemented by successively in the opposite direction to the previous driving direction of the unwinding motor of the chain 3 and the winding motor 14 of the chain.
    In the present embodiment, in which the variation of the tension of the chain WT4 in the fourth operation falls within the permissible range A, the calculated diameter which is used in the fourth operation is stored as the desired value of the diameter of 1 '. warp beam 4 in the weaving operation of the loom. As a variant, the calculated diameter, from which a correction value has been subtracted as a function of the variation of the tension of the chain WT4, can be memorized as a reference value and can be stored in the memory of the control device 2. After determining the diameter of the chain weft 4, the start switch 23 is actuated by the loom operator to start the loom. According to the first embodiment, the unwinding motor of the chain 3 and the winding motor of the chain 14 are driven at the rotation speed which corresponds precisely to the actual diameter of the warp beam 4, which allows to correctly distribute the chain 4A and start the operation of the loom stably. If the control device 2 determines that the variation of the tension of the chain falls within the permissible range A in the first operation, the second subsequent operation is not implemented, the diameter calculated in the first operation is stored as value setpoint and the speed of rotation of the unwinding motor of the chain 3 and the winding motor of the chain 14 is calculated by using the setpoint value. The rotational speed calculated in this way is stored as a set value which is used when starting the loom.
    The first embodiment provides the following advantages: (1) the diameter of the chain isoform 4 is calculated by detecting the variation of the warp tension and estimating the deviation from the actual diameter based on the variation detect the tension of the chain. As a result, the calculated diameter of the chain halt, which is substantially equal to the actual diameter, is easily and precisely obtained, which prevents an irregular increase in tension after the start of the loom; (2) no manual input of the chain loops diameter is required, which prevents human error such as incorrect entry or neglect upon entry; (3) the detection of the tension of the moving chain is not affected by the change in the tension of the warp which is due to the shedding movement and the beating motion of the loom in the weaving operation, which facilitates a correct detection of the tension of the chain; (4) the unwinding motor of the chain 3 and the winding motor of the chain 14 are driven forward and backward alternately, which prevents the degradation of the chain AA, for example by comparison with the the case in which the chain unwinding motor and the chain winding motor are driven only forward; (5) adjustment of the allowable range A for the variation of the tension of the chain makes it possible to efficiently calculate the diameter of the warp beam 4; (6) the relationship between the deviation of the calculated diameter of the warp beam and the variation of the warp tension as shown in FIG. 2 is matched, and the control 2, which facilitates the calculation of the diameter of the warp beam from the variation of the tension of the chain.
    Hereinafter, the second embodiment of the present invention will be described with reference to FIG. The second embodiment differs from the first embodiment in that the direction of movement and the speed of movement of the chain 4A are changed. Specifically, the unwinding motor of the chain 3 and the winding motor of the chain 14 are always driven forward to distribute the chain 4A forward, and the speed of rotation of the unwinding motor of the chain 3 and the winding motor of the chain 14 is constant during the period of time TO.
    After the lapse of time T4 (which corresponds to the addition of the time periods T1 and T2 in the first embodiment) and the time T3, the control device 2 determines the chain voltages based on the signals emitted by the dynamometer 20 at points H2 and H3, respectively to which the unwinding motor of the chain 3 and the winding motor of the chain 14 are driven at the control rotation speed and at which the tension of the chain becomes stable. As was the case in the first embodiment, the controller 2 calculates the variation of the chain voltage WT1 based on the difference between the chain voltages that are detected at the points H2 and H3, and determines whether the variation of the chain tension WT1 falls within the permissible range A (as can be seen in FIG. 2).
    When the variation of the warp tension WT1 does not fall within the allowable range A, the diameter of the warp beam 4 is recalculated and is stored in the control device 2, as was the case in the first form of production. Then, the control device 2 calculates the rotational speed of the motor from the newly stored diameter of the warp beam and drives the unwinding motor of the chain 3 and the winding motor of the chain 14 forward. in the second operation. Then, the controller 2 repeats the operations indicated above until the variation of the warp voltage falls within the allowable range A.
    According to the second embodiment, in which the chain 4A is always distributed forwards, the tension of the chain 4A tends to change, which facilitates the detection of variations in the tension of the chain.
    The above-mentioned embodiments may be modified in different ways as exemplified below.
    (1) Although in the first embodiment, the rotational speed of the motor is changed by switching from a low speed to a high speed, the rotational speed of the motor can remain constant as is the case in the second embodiment. In addition, the rotational speed of the motor can be changed in the second embodiment by switching from a low speed to a high speed as is the case in the first embodiment.
    (2) Although in the first and second embodiments the motor operating period is constant in the various operations, it can be varied as required.
    (3) Although, in the first and second embodiments, the allowable range A for the variation of the tension of the chain is set as shown in FIG. 2, the actuation of the motor can be repeated until that the variation of the tension of the chain becomes essentially null.
    (4) Although, in the first and second embodiments, the relationship between the deviation of the calculated diameter of the warp beam and the variation of the warp tension in the control device 2 is programmed, a formula can be programmed for calculating the diameter of the warp as a function of the variation of the tension of the warp.
    (5) The method of calculating the diameter of the warp doubloup according to the present invention can be implemented at any time after stopping the loom and before restarting the loom. , and also after the replacement of the chain halftone.
    (6) The present invention can be used to calculate the diameter of a pile warp beam in a pile weaving machine.
    (7) Although in the first and second embodiments, the chain unwinding motor 3 and the chain winding motor 14 are driven for the given period of time TO to calculate the diameter of the they can be driven in such a way that the amount of movement of the chain is constant. Alternatively, the operating time of the engine or the amount of movement of the chain in the respective operations are not necessarily constant, provided that the deviation of the calculated diameter from the actual diameter can be estimated from the variation of the tension of the chain.
    权利要求:
    Claims (8)
    [1]
    A method of determining the diameter of the warp loom in a loom which includes a chain unwinding motor for independently rotating a warp loom and a winding motor. the chain for the rotation of a fabric winding beam, independently, the method comprising the steps of: driving the chain unwinding motor and the chain winding motor before the loom does not start his weaving; detecting chain tensions at time intervals while the chain unwinding motor and the chain winding motor are driven; calculate the variation of the tension of the chain from the warp tensions; and calculating the diameter of the chain asunculus based on the variation of the chain intention.
    [2]
    The method of claim 1, wherein the step of calculating the diameter of the warp wear includes correcting the previously calculated diameter of the warp wearer based on a previously calculated deviation of the diameter of the warp. warp beam relative to the actual diameter of the warp, the deflection being determined by the variation of the warp tension.
    [3]
    The method according to claim 2, wherein the steps of driving the chain unwinding motor and the chain winding motor, detecting the chain tensions, calculating the variation of the chain tension and to calculate the diameter of the warp beam are repeated until the variation of the warp tension falls within a predetermined permissible range, the calculated diameter of the warp beam being used to determine the speed of the warp motor. the chain unwinding motor and the chain winding motor must be driven the next time.
    [4]
    A method according to claim 3, wherein the step of driving the chain unwinding motor and the chain winding motor is carried out successively in the opposite direction to the previous driving direction. the unwinding motor of the chain and the motor of winding of the chain.
    [5]
    The method of claim 3, wherein the step of driving the chain unwinding motor and the chain winding motor is always carried out in the forward direction.
    [6]
    The method according to any one of claims 2 to 5, wherein the step of calculating the warp beam diameter is carried out using a predetermined relationship between the deviation of the calculated beam diameter of the beam. chain and the variation of the tension of the chain.
    [7]
    A method according to any one of claims 1 to 5, wherein the steps of driving the chain unwinding motor and the chain winding motor, detecting chain tensions, calculating the variation of the tension of the chain and to calculate the diameter of the warp beam are implemented after the replacement of the warp beam.
    [8]
    An apparatus for determining the diameter of the warp beam in a loom, comprising: a chain unwinding motor for independently rotating a beam of the warp; a chain winding motor for rotating a fabric winding beam, independently, a controller for commenting on the operation of the chain unwinding motor and the chain winding motor; and a chain voltage detector which sends a detection signal as a function of the voltage of the chain; wherein the control device drives the chain unwinding motor and the chain winding motor before the loom begins to weave; the controller receives detection signals from the chain tension sensor at time intervals while the chain unwinding motor and the chain winding motor are driven; the controller calculates the variation of the string voltage from the detection signals; and the controller calculates the diameter of the warp beam based on the variation of the warp tension.
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    JP5182210B2|2013-04-17|
    CN101876118B|2012-04-18|
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    CN106044389A|2016-07-20|2016-10-26|江苏友诚数控科技有限公司|Bobbin creel mechanism with single yarn tension automatic control function|
    CN106480586A|2016-12-21|2017-03-08|江苏友诚数控科技有限公司|A kind of stop mechanism for towel machine pine tag mechanism|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2009109170A|JP5182210B2|2009-04-28|2009-04-28|Method for detecting the diameter of a warp beam in a loom|
    JP2009109170|2009-04-28|
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