EP3910098A1 - Métier à tisser à jet d'air avec dispositif de réglage de direction de sous-buse - Google Patents

Métier à tisser à jet d'air avec dispositif de réglage de direction de sous-buse Download PDF

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Publication number
EP3910098A1
EP3910098A1 EP21168013.7A EP21168013A EP3910098A1 EP 3910098 A1 EP3910098 A1 EP 3910098A1 EP 21168013 A EP21168013 A EP 21168013A EP 3910098 A1 EP3910098 A1 EP 3910098A1
Authority
EP
European Patent Office
Prior art keywords
sub
nozzle
measurement point
air
air pressure
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.)
Pending
Application number
EP21168013.7A
Other languages
German (de)
English (en)
Inventor
Masataka Hamaguchi
Hiroshi Yachi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP3910098A1 publication Critical patent/EP3910098A1/fr
Pending legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3006—Construction of the nozzles
    • D03D47/302—Auxiliary nozzles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D03D47/304—Controlling of the air supply to the auxiliary nozzles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3093—Displaying data

Definitions

  • the present disclosure relates to a sub-nozzle air direction adjustment device of an air jet loom.
  • Japanese Patent Application Publication No. H09-176937 discloses a sub-nozzle air direction adjustment device that adjusts a direction of air discharged from a sub-nozzle.
  • a sub-nozzle air direction adjustment device that adjusts a direction of air discharged from a sub-nozzle.
  • a plurality of pitot tubes are disposed along a wall surface of a reed, and a maximum air pressure of air discharged from each of sub-nozzles is measured while the pitot tubes are moved in a weft insertion direction.
  • An operator adjusts a rotation angle and a height of each of the sub-nozzles while checking a digital display and a bar indicator, so that a position where the maximum air pressure is measured is adjusted to a desirable position.
  • the rotation angle and the height of each of the sub-nozzles need be moved in a searching manner so as to adjust the direction of air discharged from each of the sub-nozzles. Therefore, there is a demand for efficient adjustment of the direction of air discharged from each of the sub-nozzles.
  • the present disclosure has been made to solve the above problem, and is directed to providing a sub-nozzle air direction adjustment device that can adjust a direction of air discharged from a sub-nozzle efficiently.
  • a sub-nozzle air direction adjustment device of an air jet loom including a main nozzle for weft insertion, a sub-nozzle for the weft insertion, a reed including a plurality of dents arranged in a weft insertion direction, a weft passage formed by guide recesses of the dents, and a weft yarn to be inserted through the weft passage by air discharged from the main nozzle and the sub-nozzle.
  • the sub-nozzle air direction adjustment device includes a pressure sensor that measures an air pressure of the air discharged from the sub-nozzle at a measurement point group including at least three measurement points, a calculation unit that calculates a maximum air pressure position that is positioned on an imaginary plane including the measurement point group and where the air pressure of the air discharged from the sub-nozzle becomes maximum, based on measured values at the measurement point group measured by the pressure sensor, and a display unit that displays the maximum air pressure position and a target position for the maximum air pressure position, the display unit showing at least one of a movement path of the maximum air pressure position obtained by rotating the sub-nozzle in a circumferential direction with an axial direction in which the sub-nozzle extends at a center, and a movement path of the target position, the movement path of the maximum air pressure position and the movement path of the target position being on the imaginary plane including the measurement point group.
  • upstream and downstream will be used to indicate directions with respect to a weft insertion direction, i.e., a direction in which a weft yarn is inserted through a warp shed and travels
  • upstream side will refer to a side from which the weft yarn is inserted
  • downstream side will refer to a side to which the weft yarn travels.
  • a weft insertion apparatus will be described firstly, and a sub-nozzle air direction adjustment device will be described next.
  • a weft insertion apparatus 10 includes a weft insertion nozzle 11, a yarn supply package 12, a weft measuring and storing device 13, a reed 14, a plurality of sub-nozzles 15 for a weft insertion, and a control device 16.
  • the control device 16 is equipped with a display device 16a having display and input functions.
  • the yarn supply package 12 is disposed upstream of the weft insertion nozzle 11. With the rotation of a winding arm (not illustrated) of the weft measuring and storing device 13, a weft yarn Y is pulled out from the yarn supply package 12 and wound around a storage drum 17 to be stored on the storage drum 17.
  • the weft measuring and storing device 13 has a weft stop pin 18 and a balloon sensor 19 that detects unwinding of the weft yarn Y from the weft measuring and storing device 13.
  • the weft stop pin 18 and the balloon sensor 19 are arranged at positions around the storage drum 17.
  • the weft stop pin 18 is electrically connected to the control device 16.
  • the weft stop pin 18 is operable to unwind the weft yarn Y stored on the storage drum 17 when an air jet loom is rotated to a predetermined angular position thereof that is preset in the control device 16.
  • a timing at which the weft stop pin 18 is actuated for unwinding the weft yarn Y corresponds to a weft insertion start timing.
  • the balloon sensor 19 is electrically connected to the control device 16.
  • the balloon sensor 19 detects the weft yarn Y being unwounded from the storage drum 17 during the weft insertion, and generates a weft unwinding signal to the control device 16.
  • the control device 16 receives a preset number of weft unwinding signals (four signals in the present embodiment)
  • the control device 16 actuates the weft stop pin 18.
  • the control device 16 causes the weft stop pin 18 to stop the weft yarn Y being unwounded from the storage drum 17, thereby ending the weft insertion.
  • an operation timing of the weft stop pin 18 to stop the weft yarn Y is set depending on the number of turns of the weft yarn Y to be wound around the storage drum 17 that is required for storing the weft yarn Y of a length corresponding to a weaving width TL of the air jet loom.
  • the control device 16 is configured to send an operation signal for stopping the weft yarn Y to the weft stop pin 18 upon receiving four weft unwinding signals from the balloon sensor 19.
  • the weft yarn Y of the length corresponding to a length required for the weft yarn Y wound around the storage drum 17 for four turns is inserted, according to the weft insertion apparatus 10 of the present embodiment.
  • a weft detection signal generated by the balloon sensor 19 corresponds to an unwinding signal representing unwinding of the weft yarn Y from the storage drum 17, and is recognized by the control device 16 as the weft unwinding timing based on an angular position signal of the air jet loom obtained from an encoder 20.
  • the weft insertion nozzle 11 includes a tandem nozzle 21 that pulls out the weft yarn Y from the storage drum 17 and a main nozzle 22 for inserting the weft yarn Y into a weft passage 14a in the reed 14.
  • the weft yarn Y is inserted through the weft passage 14a by air discharged from the main nozzle 22 and the sub-nozzles 15.
  • a brake 23 is disposed upstream of the tandem nozzle 21 to apply braking to the weft yarn Y then travelling before the weft insertion ends.
  • the main nozzle 22 is connected to a main valve 22v via a pipe 22a.
  • the main valve 22v is connected to a main air tank 26 via a pipe 22b.
  • the tandem nozzle 21 is connected to a tandem valve 21v via a pipe 21a.
  • the tandem valve 21v is connected to the main air tank 26 that is commonly used for the main valve 22v via a pipe 21b.
  • the main air tank 26 is connected through a main pressure meter 27, a main regulator 28, a source pressure meter 29, and a filter 30 to a common air compressor 31 which is installed in a weaving factory. Compressed air supplied from the air compressor 31 is adjusted to a set pressure by the main regulator 28 and stored in the main air tank 26. The pressure of the compressed air which is supplied to the main air tank 26 is constantly monitored by the main pressure meter 27.
  • the sub-nozzles 15 are divided into six groups each including four sub-nozzles 15.
  • Six sub-valves 32 are provided so as to correspond to each of the groups of the sub-nozzles 15, and each of the sub-nozzles 15 is connected to its associated sub-valve 32 through a pipe 33.
  • Each of the sub-valves 32 is connected to a common sub-air tank 34.
  • the sub-air tank 34 is connected to a sub-regulator 36 via a sub-pressure meter 35.
  • the sub-regulator 36 is connected through a pipe 36a to a pipe 28a which connects between the main pressure meter 27 and the main regulator 28.
  • Compressed air supplied from the air compressor 31 is adjusted to a set pressure by the sub-regulator 36 and stored in the sub-air tank 34.
  • the pressure of the compressed air which is supplied to the sub-air tank 34 is constantly monitored by the sub-pressure meter 35.
  • the main valve 22v, the tandem valve 21v, the sub-valves 32, the source pressure meter 29, the main pressure meter 27, the sub-pressure meter 35, and the brake 23 are electrically connected to the control device 16. Timings and durations of operations of the main valve 22v, the tandem valve 21v, the sub-valves 32, and the brake 23 are preset in the control device 16. In addition, the control device 16 receives detection signals from the source pressure meter 29, the main pressure meter 27, and the sub-pressure meter 35.
  • the control device 16 outputs an operation instruction signal to the main valve 22v and the tandem valve 21v before the weft insertion start timing at which the weft stop pin 18 is actuated, so that compressed air is discharged from the main nozzle 22 and the tandem nozzle 21.
  • the control device 16 outputs an operation instruction signal to the brake 23 before the weft leading end arrival timing at which the weft stop pin 18 is operated to stop the weft yarn Y on the storage drum 17.
  • the brake 23 applies braking to the weft yarn Y traveling at high speed so as to reduce the travelling speed of the weft yarn Y, thereby relieving the impact on the weft yarn Y at the weft leading end arrival timing.
  • Data of various fabric conditions and weaving conditions are registered and stored in the control device 16.
  • the fabric conditions include types of yarn used for the weft yarn Y such as material and count, a density of the weft yarn, types of yarn used for a warp yarn such as material and count, a density of the warp yarn, a weaving width, and a woven fabric structure.
  • the weaving conditions include the rotation speed of the loom, the pressures of compressed air in the main air tank 26 and the sub-air tank 34, the opening degrees of the main valve 22v and the tandem valve 21v, the weft insertion start timing, and the target weft leading end arrival timing.
  • tandem nozzle 21, the brake 23, the weft measuring and storing device 13 and the yarn supply package 12 are fixed to a bracket or the like that is mounted to a frame of the air jet loom or a floor surface.
  • the main nozzle 22, the sub-nozzles 15 and the reed 14 are mounted to a sley 24 of the air jet loom, the sley 24 making a reciprocating motion in a back and forth direction of the air jet loom.
  • the reed 14 includes a plurality of dents 14c arranged in line in the weft insertion direction and each having a guide recess 14b.
  • the weft passage 14a is formed by the guide recesses 14b of the dents 14c.
  • the sub-nozzles 15 are fixed to the sley 24 through support blocks 25.
  • the sub-nozzles 15 are movable in and out of a warp shed of warp yarns T from between the warp yarns T with the swinging movement of the sley 24.
  • an injection port 15a from which air is discharged is formed in a tip of each of the sub-nozzles 15. Air is injected in the weft passage 14a with air discharged from the injection ports 15a of the sub-nozzles 15 towards the guide recesses 14b of the dents 14c.
  • An operator adjusts the direction of air discharged from the sub-nozzles 15 every time the fabric conditions and the weaving conditions changes.
  • the fabric conditions and the weaving conditions are set through the control device 16.
  • the operator adjusts air directions of the sub-nozzles 15 one by one.
  • the air direction from the sub-nozzle 15 is adjusted by moving the sub-nozzle 15 relative to the support block 25 along the axial direction of the sub-nozzle 15 and by rotating the sub-nozzle 15 relative to the support block 25 in a circumferential direction with the axis of the sub-nozzle 15 at the center.
  • the axial direction of the sub-nozzle 15 will be simply referred to as an axial direction S11.
  • the circumferential direction with the axis of the sub-nozzle 15 at the center will be simply referred to as a circumferential direction S12.
  • an adjustment dent 114c, the sub-nozzle 15, and a sub-nozzle air direction adjustment device 40 are mounted on the sley 24.
  • the adjustment dent 114c is disposed at a portion of the reed 14 on the sley 24.
  • the adjustment dent 114c has the same shape as each of the dents 14c, and has an adjustment guide recess 114b having the same shape as the guide recess 14b of each of the dents 14c.
  • a space defined by the adjustment guide recess 114b corresponds to an adjustment weft passage 114a.
  • the adjustment weft passage 114a is formed at the same position as the weft passage 14a formed by the guide recesses 14b of the dents 14c.
  • the length of the sub-nozzle 15 projecting out from the support block 25 in the axial direction S11 is set at a specific projection length.
  • the specific projection length is set so as to correspond to the fabric conditions and the weaving conditions.
  • the adjustment of the air direction of the sub-nozzle 15 is accomplished using the sub-nozzle air direction adjustment device 40.
  • the sub-nozzle air direction adjustment device 40 includes a pressure measuring device 41, a calculation unit 51, and a display unit 52.
  • the pressure measuring device 41, the calculation unit 51, and the display unit 52 are electrically connected.
  • the display unit 52 has a first screen 52a, a second screen 52b, and a third screen 52c.
  • the pressure measuring device 41 is configured to measure an air pressure of air discharged from the sub-nozzle 15.
  • the pressure measuring device 41 is attached to the sley 24 downstream of the adjustment weft passage 114a by the operator.
  • the pressure measuring device 41 includes a sensor base member 42 that is attachable to and detachable from the sley 24, and a pressure sensor 43 mounted on the sensor base member 42.
  • the sensor base member 42 includes a base shaft portion 42a having a rectangular pillar shape, and a base main body 42b positioned at a first end portion of the base shaft portion 42a in an axial direction thereof and having a rectangular plate shape.
  • a second end portion of the base shaft portion 42a that is opposite from the base main body 42b in the axial direction of the base shaft portion 42a is mounted to the sley 24.
  • the base main body 42b is positioned downstream of the adjustment dent 114c in the weft insertion direction and side-by side with the adjustment dent 114c.
  • the pressure sensor 43 includes a plurality of pitot tubes 44 configured to measure a flow velocity of fluid.
  • the pressure sensor 43 of the present embodiment includes eight pitot tubes 44.
  • Each of the pitot tubes 44 extends along the weft insertion direction from the base main body 42b towards the adjustment dent 114c.
  • the pressure sensor 43 can measure the air pressure of the air discharged from the sub-nozzle 15 at eight measurement points with the pitot tubes 44.
  • the pitot tubes 44 are positioned inside the adjustment guide recess 114b of the adjustment dent 114c, on an edge portion of the adjustment dent 114c forming the adjustment guide recess 114b, and on a portion around the adjustment guide recess 114b, as viewed from the upstream side in the weft insertion direction.
  • Four pitot tubes 44 are positioned so as to form a square having a first length A in each side of the square, as viewed from the upstream side in the weft insertion direction. These four pitot tubes 44 will be referred to as the first pitot tubes 44a.
  • the second pitot tubes 44b are disposed outward of the four first pitot tubes 44a, as viewed from the upstream side in the weft insertion direction.
  • the first screen 52a of the display unit 52 displays a measurement point group P1 including four measuring points at which air pressures are measured by the four first pitot tubes 44a, and a preliminary measurement point group P2 including four measuring points at which air pressures are measured by the four second pitot tubes 44b.
  • the four measurement points of the preliminary measurement point group P2 are positioned outward of the four measurement points of the measurement point group P1.
  • the first screen 52a shows an X-Y coordinate system having an X-axis and a Y-axis, extending perpendicularly to each other, in which the measuring points of the measurement point group P1 and the measuring points of the preliminary measurement point group P2 are indicated at their respective coordinates.
  • the four measuring points of the measurement point group P1 displayed on the first screen 52a are defined as a first measurement point P11, a second measurement point P12, a third measurement point P13, and a fourth measurement point P14.
  • the X-coordinate values of the first measurement point P11 and the second measurement point P12 are the same.
  • the Y-coordinate values of the second measurement point P12 and the third measurement point P13 are the same.
  • the X-coordinate values of the third measurement point P13 and the fourth measurement point P14 are the same.
  • the X-coordinate values of the third measurement point P13 and the fourth measurement point P14 are greater than those of the first measurement point P11 and the second measurement point P12.
  • the Y-coordinate values of the fourth measurement point P14 and the first measurement point P11 are the same.
  • the Y-coordinate values of the fourth measurement point P14 and the first measurement point P11 are greater than those of the second measurement point P12 and the third measurement point P13.
  • the four measuring points of the preliminary measurement point group P2 displayed on the first screen 52a are defined as a first preliminary measurement point P21, a second preliminary measurement point P22, a third preliminary measurement point P23, and a fourth preliminary measurement point P24.
  • the X-coordinate values of the first preliminary measurement point P21 and the second preliminary measurement point P22 are the same.
  • the Y-coordinate values of the second preliminary measurement point P22 and the third preliminary measurement point P23 are the same.
  • the X-coordinate values of the third preliminary measurement point P23 and the fourth preliminary measurement point P24 are the same.
  • the X-coordinate values of the third preliminary measurement point P23 and the fourth preliminary measurement point P24 are greater than those of the first preliminary measurement point P21 and the second preliminary measurement point P22.
  • the Y-coordinate values of the fourth preliminary measurement point P24 and the first preliminary measurement point P21 are the same.
  • the Y-coordinate values of the fourth preliminary measurement point P24 and the first preliminary measurement point P21 are greater than those of the second preliminary measurement point P22 and the third preliminary measurement point P23.
  • the first screen 52a shows an air pressure distribution with a maximum air pressure position Pc at the center based on the measured values measured by the first pitot tubes 44a.
  • the air pressure distribution is shown by dot-hatching in the first screen 52a.
  • a portion showing the air pressure distribution on the first screen 52a is enlarged.
  • the maximum air pressure position Pc is a position where the air pressure of air discharged from the sub-nozzle 15 becomes maximum.
  • the air pressure is shown so as to be lower with increasing distance from the maximum air pressure position Pc so that the air pressure is distributed in a circle with the maximum air pressure position Pc at the center.
  • the air pressure measure by the preliminary measurement point group P2 is lower than the air pressure measured by the measurement point group P1 when the maximum air pressure position Pc is positioned in an area surrounded by the measurement point group P1.
  • the display unit 52 displays information indicating that preliminary adjustment is required for a distance L from the measurement point group P1 to the sub-nozzle 15, based on the measured values at the preliminary measurement point group P2 by the pressure sensor 43. Specifically, when a deviation value of the measured values among the measurement points of the preliminary measurement point group P2 is at or greater than a predetermined threshold value, the display unit 52 displays information indicating that preliminary adjustment is required to provide an instruction for the operator to perform the preliminary adjustment.
  • the threshold value is set to a value by which it can be estimated that the maximum air pressure position Pc is positioned in the area surrounded by the measurement point group P1 when the deviation value of the measured values among the measurement points of the preliminary measurement point group P2 is less than the threshold value.
  • the calculation unit 51 calculates a position of the maximum air pressure position Pc based on the measured values measured by the first pitot tubes 44a. In other words, the calculation unit 51 calculates the maximum air pressure position Pc based on the measured values at the measurement point group P1 by the pressure sensor 43. The calculation unit 51 of the present embodiment calculates the maximum air pressure position Pc based on the measured values at the first measurement point P11, the second measurement point P12, and the third measurement point P13. The maximum air pressure position Pc is positioned on an imaginary plane including the measurement point group P1.
  • the calculation unit 51 calculates differences between the measured values at the first measurement point P11 and the second measurement point P12 and an arbitrary fixed value, which is set in advance, as first calculation values.
  • the arbitrary fixed value is, for example, an air pressure value at the maximum air pressure position Pc which is set by the operator in advance. Then, the calculation unit 51 calculates a ratio of the first calculation value corresponding the first measurement point P11 to the first calculation value corresponding to the second measurement point P12.
  • the calculation unit 51 calculates differences between the measured values at the second measurement point P12 and the third measurement point P13 and an arbitrary fixed value, which is set in advance, as second calculation values.
  • the arbitrary fixed value is, for example, an air pressure value at the maximum air pressure position Pc which is set by the operator in advance. Then, the calculation unit 51 calculates a ratio of the second calculation value corresponding to the second measurement point P12 to the second calculation value corresponding to the third measurement point P13.
  • the calculation unit 51 calculates the maximum air pressure position Pc based on the calculated ratio of the first calculation values and the ratio of the second calculation values. Specifically, a line drawn by connecting points, at each of which the calculated ratio of the first calculation values is equal to a ratio of a distance to the first measurement point P11 to a distance to the second measurement point P12, is defined as a first measurement line L1. A line drawn by connecting points, at each of which the calculated ratio of the second calculation values is equal to a ratio of the distance to the second measurement point P12 to a distance to the third measurement point P13, is defined as a second measurement line L2. Then, the calculation unit 51 calculates an intersection point of the first measurement line L1 and the second measurement line L2 as the maximum air pressure position Pc.
  • first measurement line L1 and the second measurement line L2 are indicated by broken lines in the first screen 52a illustrated in FIG. 6 , but the first measurement line L1 and the second measurement line L2 need not necessarily be displayed or may be displayed on first screen 52a.
  • the calculation unit 51 is configured to calculate the maximum air pressure position Pc under the condition that the maximum air pressure position Pc is positioned in the area surrounded by the measurement point group P1. Thus, when the maximum air pressure position Pc is positioned in the area surrounded by the measurement point group P1, the calculation unit 51 calculates the maximum air pressure position Pc and the first screen 52a shows the maximum air pressure position Pc. On the other hands, when the maximum air pressure position Pc is not positioned in the area surrounded by the measurement point group P1, the calculation unit 51 does not calculate the maximum air pressure position Pc and the first screen 52a does not show the maximum air pressure position Pc.
  • the display unit 52 displays information providing an instruction on the preliminary adjustment.
  • the operator moves the pressure measuring device 41 in the weft insertion direction so as to adjust the distance L of the measurement point group P1 to the sub-nozzle 15.
  • the calculation unit 51 calculates the maximum air pressure position Pc and the first screen 52a shows the maximum air pressure position Pc.
  • the calculation unit 51 calculates a movement path Tp of the maximum air pressure position Pc when the sub-nozzle 15 rotates in the circumferential direction S12.
  • the display unit 52 displays the movement path Tp calculated by the calculation unit 51 on the first screen 52a.
  • the movement path Tp is positioned on an imaginary plane including the measurement point group P1.
  • the movement path Tp is a straight line including the maximum air pressure position Pc and representing a linear function having a slope which is set based on the set fabric conditions and weaving conditions. Under the same fabric conditions and the same weaving conditions, the movement path Tp displayed on the first screen 52a is shifted in the Y-axis direction with the same slope according to the distance L from the measurement point group P1 to the sub-nozzle 15.
  • the first screen 52a shows a target position Pt for the maximum air pressure position Pc of the sub-nozzle 15 and a movement path of the target position Pt.
  • the movement path of the target position Pt is defined as a target movement path Tt.
  • the target position Pt is the maximum air pressure position Pc set in advance based on fabric conditions and weaving conditions.
  • the target movement path Tt is a straight line including the target position Pt and representing a linear function having a slope which is set based on the set fabric conditions and the weaving conditions.
  • the target position Pt and the target movement path Tt are positioned on the imaginary plane including the measurement point group P1.
  • FIG. 6 illustrates a display image by the first screen 52a when the maximum air pressure position Pc and the target position Pt coincide with each other. In this case, the movement path Tp and the target movement path Tt also coincide with each other.
  • the display unit 52 displays a displacement between the movement path Tp and the target movement path Tt. Specifically, the display unit 52 displays a distance adjustment amount Lb that is an adjustment amount for the distance L from the measurement point group P1 to the sub-nozzle 15 in the weft insertion direction as the displacement between the movement path Tp and the target movement path Tt on the second screen 52b.
  • the distance adjustment amount Lb is a value set depending on the movement path Tp for a set fabric condition and weaving condition.
  • FIG. 7 illustrates a display image displayed by the display unit 52 in a case where the movement path Tp and the target movement path Tt are displaced.
  • the first screen 52a it is shown that the movement path Tp and the target movement path Tt having the same slope are displaced in the Y-axis direction.
  • the maximum air pressure position Pc is shown on the movement path Tp and the target position Pt is shown on the target movement path Tt.
  • the maximum air pressure position Pc and the target position Pt are displaced on the first screen 52a.
  • a Y-coordinate value of a point on the movement path Tp is a first coordinate value Y1 and a Y-coordinate value of a point on the target movement path Tt is a second coordinate value.
  • the display unit 52 displays the distance adjustment amount Lb on the second screen 52b based on a first difference ⁇ Y that is a difference between the first coordinate value Y1 and the second coordinate value Y2. That is, the display unit 52 displays the distance adjustment amount Lb on the second screen 52b based on a displaced amount between the movement path Tp and the target movement path Tt in the Y-axis direction.
  • the display unit 52 displays displacement between the maximum air pressure position Pc calculated by the calculation unit 51 and the target position Pt. Specifically, the display unit 52 displays a rotation adjustment amount Lc for the sub-nozzle 15 in the circumferential direction S12 as the displacement between the maximum air pressure position Pc and the target position Pt on the third screen 52c.
  • the rotation adjustment amount Lc is a value that allows the maximum air pressure position Pc and the target position Pt to coincide with each other when the sub-nozzle 15 is adjusted in the circumferential direction S12 by the rotation adjustment amount Lc while the movement path Tp and the target movement path Tt coincide with each other.
  • the rotation adjustment amount Lc is set correspondingly to the maximum air pressure position Pc for a set fabric condition and weaving condition.
  • FIG. 8 illustrates a display image displayed by the display unit 52 in a case where the maximum air pressure position Pc and the target position Pt are displaced while the movement path Tp and the target movement path Tt coincide with each other. It is assumed that X-coordinate values of the target position Pt and the maximum air pressure position Pc are a fourth coordinate value X1 and a fifth coordinate value X2, respectively.
  • the display unit 52 displays the rotation adjustment amount Lc on the third screen 52c based on a second difference ⁇ X that is a difference between the fourth coordinate value X1 and the fifth coordinate value X2.
  • the display unit 52 displays the rotation adjustment amount Lc on the third screen 52c based on a displacement amount between the maximum air pressure position Pc and the target position Pt in the X-axis direction.
  • the maximum air pressure position Pc is moved in the X-axis direction so as to coincide the target position Pt while the movement path Tp and the target movement path Tt coincide with each other.
  • the air direction adjustment process for the sub-nozzle 15 is performed on each of the sub-nozzles 15 to be mounted on the sley 24. Every time the adjustment of the air direction of one sub-nozzle 15 completes, the operator moves the adjustment dent 114c and the pressure measuring device 41 to a position corresponding to the next sub-nozzle 15 and performs the adjustment of the air direction of the next sub-nozzle 15.
  • the operator mounts the sub-nozzle 15, the adjustment dent 114c, and the pressure measuring device 41 on the sley 24.
  • the operation of the sub-nozzle air direction adjustment device 40 by the operator starts processing of the sub-nozzle air direction adjustment device 40.
  • Step S1 when the processing by the sub-nozzle air direction adjustment device 40 starts, firstly, whether or not discharge of air from the sub-nozzle 15 has been started is determined (Step S1).
  • the pressure sensor 43 detects the measured values at the preliminary measurement point group P2 corresponding to the second pitot tubes 44b, it is determined that the discharge of air from the sub-nozzle 15 has been started. While it is not determined that the discharge of air from the sub-nozzle 15 has been started (NO at Step S1), the determination at Step 1 is repeatedly performed.
  • the discharge of air from the sub-nozzle 15 is started by the operation by the operator, it is determined that the discharge of air from the sub-nozzle 15 has been started (YES at Step S1).
  • Step S2 whether or not the deviation of the measured values among the measurement points of the preliminary measurement point group P2 is at or greater than the predetermined threshold value is determined.
  • the display unit 52 display information indicating that the preliminary adjustment is required (Step S3), and then the operator moves the pressure measuring device 41.
  • the process proceeds to the next Step.
  • the calculation unit 51 calculates the maximum air pressure position Pc and the movement path Tp based on the measured values at the measurement point group P1 (Step S4). Then, the maximum air pressure position Pc, the movement path Tp, the target position Pt, and the target movement path Tt are displayed on the first screen 52a of the display unit 52 (Step 5).
  • Step S6 whether or not the movement path Tp and the target movement path Tt coincide with each other is determined.
  • the display unit 52 displays the distance adjustment amount Lb corresponding to the displacement amount between the movement path Tp and the target movement path Tt on the second screen 52b (Step S7), and then, the operator moves the pressure measuring device 41 by the distance adjustment amount Lb.
  • the process proceeds to the next Step.
  • Step S8 whether or not the maximum air pressure position Pc and the target position Pt coincide with each other is determined.
  • the display unit 52 displays the rotation adjustment amount Lc corresponding to the displacement amount between the maximum air pressure position Pc and the target position Pt on the third screen 52c (Step S9), and then, the operator rotates the sub-nozzle 15 in the circumferential direction S12 by the rotation adjustment amount Lc.
  • the adjustment dent 114c need not necessarily be provided for the adjustment of the air direction of the sub-nozzle 15.
  • the dents 14c of the air jet loom may be used for the adjustment of the air direction of the sub-nozzle 15.
  • the specifications of the calculation unit 51 and the display unit 52, the specification of the air pressure measurement by the pressure sensor 43, the specifications of the sub-nozzle air direction adjustment device 40 may be modified according to the specification of the dents 14c.
  • the pressure sensor 43 may further include a pitot tube 44 positioned in a region surrounded by the four first pitot tubes 44a. This pitot tube 44 may be positioned at a position where the distances to the first pitot tubes 44a are identical. This pitot tube 44 permits measuring the air pressure at the center of the air pressure distribution.
  • the display unit 52 may be configured to display information related to the preliminary adjustment based on the measured values at the preliminary measurement point group P2 by the pressure sensor 43, in addition to the information indicating that the preliminary adjustment of the distance L from the measurement point group P1 to the sub-nozzle 15 is required.
  • the display unit 52 may be configured to display the adjustment direction for the measurement point group P1, e.g., moving the measurement point group P1 away from and close to the sub-nozzle 15.
  • the display unit 52 displays "+" when the measurement point group P1 need be moved away from the sub-nozzle 15 and "-" when the measurement point group P1 need be moved closer to the sub-nozzle 15.
  • the display unit 52 may display an adjustment amount for the distance L from the measurement point group P1 to the sub-nozzle 15.
  • the number of the second pitot tubes 44b for the pressure sensor 43 may be changed as long as the pressure sensor 43 includes at least three second pitot tubes 44b. In short, the number of the second pitot tubes 44b may be changed as long as the air pressures are measured in the preliminary measurement point group P2 including at least three measurement points positioned outward of the measurement point group P1.
  • the second pitot tubes 44b may be omitted from the pressure sensor 43.
  • a plurality of values for the distance L is set depending on the fabric conditions and the weaving conditions, and the operator adjusts the position of the measurement point group P1 relative to the sub-nozzle 15 using the value for the distance L set correspondingly to the fabric conditions and the weaving conditions in adjusting the air direction of the sub-nozzle 15.
  • the measurement of air pressure at the preliminary measurement point group P2 and the display of information indicating that the preliminary adjustment is required by the display unit 52 are omitted.
  • Steps S2 and S3 are omitted.
  • the number of the first pitot tubes 44a of the pressure sensor 43 may be changed suitably as long as the pressure sensor 43 includes at least three first pitot tubes 44a. In short, the number of the first pitot tubes 44a may be changed as long as the air pressures are measured in the measurement point group P1 including at least three measurement points.
  • the display unit 52 may be configured to display information indicating that the adjustment of the position of the measurement point group P1 relative to the sub-nozzle 15 is required, instead of displaying the distance adjustment amount Lb. In this case, the display unit 52 displays the information indicating that the adjustment of the position of the measurement point group P1 relative to the sub-nozzle 15 is required at Step S7 in FIG. 9 .
  • the display of the distance adjustment amount Lb and the information indicating that the adjustment of the position of the measurement point group P1 relative to the sub-nozzle 15 is required by the display unit 52 may be omitted. In this case, the processing of Step S7 shown in FIG. 9 is omitted, and the processing of Step S6 is repeated while it is determined NO at Step S6.
  • the display unit 52 may be configured to display information indicating that the rotation adjustment of the sub-nozzle 15 is required, instead of displaying the rotation adjustment amount Lc. In this case, the display unit 52 displays information indicating that the rotation adjustment of the sub-nozzle 15 is required at Step S9 shown in FIG. 9 .
  • the display of rotation adjustment amount Lc and information indicating that the rotation adjustment of the sub-nozzle 15 by the display unit 52 may be omitted. In this case, the processing of Step 9 shown in FIG. 9 is omitted, and the processing of Step S8 is repeated while it is determined NO at Step S8.
  • the display unit 52 need not display the target movement path Tt. In this case, the display unit 52 displays the maximum air pressure position Pc, the target position Pt, and the movement path Tp. When the target position Pt displayed by the display unit 52 is not positioned on the movement path Tp, the operator adjusts the position of the measurement point group P1 relative to the sub-nozzle 15 until the target position Pt is positioned on the movement path Tp.
  • the display unit 52 need not necessarily display the movement path Tp. In this case, the display unit 52 displays the maximum air pressure position Pc, the target position, and the target movement path Tt. When the maximum air pressure position Pc displayed by the display unit 52 is not positioned on the target movement path Tt, the operator adjusts the position of the measurement point group P1 relative to the sub-nozzle 15 until the maximum air pressure position Pc is positioned on the target movement path Tt.
  • a sub-nozzle air direction adjustment device (40) of an air jet loom includes a pressure sensor (43), a calculation unit (51), and a display unit (52).
  • the pressure sensor (43) measures an air pressure from the sub-nozzle (15) at a measurement point group (P1) including at least three measurement points.
  • the calculation unit (51) calculates a maximum air pressure position (Pc) where the air pressure of the air discharged from the sub-nozzle (15) becomes maximum based on measured values at the measurement point group (P1) measured by the pressure sensor (43).
  • the display unit (52) displays the maximum air pressure position (Pc) and a target position (Pt), a movement path (Tp) of the maximum air pressure position (Pc) obtained by rotating the sub-nozzle (15) in a circumferential direction (S12) with an axis of the sub-nozzle (15) at a center, and a movement path (Tt) of the target position (Pt).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
EP21168013.7A 2020-05-12 2021-04-13 Métier à tisser à jet d'air avec dispositif de réglage de direction de sous-buse Pending EP3910098A1 (fr)

Applications Claiming Priority (1)

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JP2020083975A JP7298537B2 (ja) 2020-05-12 2020-05-12 エアジェット織機のサブノズル噴射方向調整装置

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EP3910098A1 true EP3910098A1 (fr) 2021-11-17

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JP2892479B2 (ja) * 1990-10-12 1999-05-17 津田駒工業株式会社 筬溝内の風速測定方法
JP2907648B2 (ja) * 1992-07-16 1999-06-21 津田駒工業株式会社 流体噴射式織機における噴射流測定方法と噴射流測定装置
JP3103758B2 (ja) * 1995-12-27 2000-10-30 株式会社豊田中央研究所 エアジェットルームにおける噴流指向方向測定方法及び装置
JP4153341B2 (ja) 2003-03-26 2008-09-24 三菱電線工業株式会社 光ファイバ
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JP5544313B2 (ja) * 2011-01-13 2014-07-09 津田駒工業株式会社 空気噴射式織機における製織方法
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CN110553824A (zh) * 2019-08-28 2019-12-10 常州捷特纺织器材有限公司 喷气织机用辅助喷嘴检测设备

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