EP1428917A2 - Verfahren zum Bestimmen des Schusseintragszeitpunktes und Verfahren zum Einstellen der Schusseintragsparameter in Düsenwebmaschinen - Google Patents

Verfahren zum Bestimmen des Schusseintragszeitpunktes und Verfahren zum Einstellen der Schusseintragsparameter in Düsenwebmaschinen Download PDF

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Publication number
EP1428917A2
EP1428917A2 EP03025784A EP03025784A EP1428917A2 EP 1428917 A2 EP1428917 A2 EP 1428917A2 EP 03025784 A EP03025784 A EP 03025784A EP 03025784 A EP03025784 A EP 03025784A EP 1428917 A2 EP1428917 A2 EP 1428917A2
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EP
European Patent Office
Prior art keywords
weft
timing
nozzle
sub
picking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03025784A
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English (en)
French (fr)
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EP1428917A3 (de
EP1428917B1 (de
Inventor
Hideki Banba
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Tsudakoma Corp
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Tsudakoma Industrial Co Ltd
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Publication date
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Publication of EP1428917A2 publication Critical patent/EP1428917A2/de
Publication of EP1428917A3 publication Critical patent/EP1428917A3/de
Application granted granted Critical
Publication of EP1428917B1 publication Critical patent/EP1428917B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/005—Displays or displaying data
    • 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
    • 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
    • D03D47/3053—Arrangements or lay out of air supply systems
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/02—General arrangements of driving mechanism

Definitions

  • the present invention relates to a method of calculating the timing of weft picking and a method of setting weft inserting condition, both being practicable in a fluid jet loom such as an air jet loom, a water jet loom or the like.
  • a weft is held in a device capable of measuring the length of the weft and storing the weft (referred to as “weft length measuring storage unit” hereinafter). At this time, the weft is in the state where the leading end portion of it is put into a weft inserting nozzle.
  • the weft is made free from a restrictive state caused by a weft engaging pin of the weft length measuring storage unit and is immediately inserted into a warp shed with assistance of the fluid jetting from the weft inserting nozzle.
  • the flying condition (weft inserting condition) of the weft varies depending on a sort of the weft as well as on the rotational number (r. p. m.) of the main shaft of the jet loom. Accordingly, the operator of the jet loom is requested to newly set the timing of weft picking whenever a sort of the weft and the rotational number of the main shaft have to be changed because of change in an objective fabric to be woven.
  • the procedure for setting the jet timing on the supplied pressure fluid of the weft inserting nozzle will be described by taking an air jet loom as an example of the fluid jet loom.
  • the weft inserting is carried out by means of a relay jet of the pressure air as performed under the cooperation of a weft inserting nozzle (i.e. a main nozzle) into which the weft is put in advance and a plurality of sub-nozzles following it.
  • weft flying start timing is determined, and then the jet start timing of the main nozzle and the release timing of the weft engaging pin are determined so as to correspond to the above weft flying start time.
  • a weft inserting pattern graph (weft flying line) is made based on the jet start timing of the main nozzle, which is decided in order to set the jet timing of the sub-nozzle.
  • the abscissa of this pattern graph indicates a crank angle of the main shaft of the air jet loom while the ordinate of the same indicates a fabric width (a distance from one selvedge on the main nozzle side to the other selvedge on the side opposite thereto).
  • the graph simply indicates the relation between the position of the leading end portion of the weft and the crank angle of the main shaft of the air jet loom in the form of a linear function i.e. a straight line.
  • the jet start timing of the sub-nozzle is set (decided) such that the jetting from the sub-nozzle starts preceding a crank angle (timing) determined from the above graph by a predetermined angle, the crank angle being given as an intersection of two lines, one line being a straight line (an imaginary flying line) drawn by connecting one point indicative of the timing of weft picking with the other point indicative of the timing of the objective weft arrival timing to the selvedge on the side counter to the weft inserting side, and the other line being a normal line (a straight line in parallel with the abscissa) indicative of the position of the sub-nozzle.
  • the jet end timing for terminating the jetting from the nozzle is set as the time when a predetermined period of time has passed after from the jet start.
  • the timing of weft picking as obtained from the graph fails to coincide with the actual timing of weft picking. Because of this, in such a technique that the jet timing of the nozzle is set by using the timing of the weft picking, should the jet start timing of one sub-nozzle be set based on the timing of weft picking which is deviated from the actual timing of the weft picking, the jet start timing of the other sub-nozzles arranged on the downstream side of the one sub-nozzle is also deviated more or less. As a result, the weft inserting comes to end in failure.
  • the jet start timing of the sub-nozzle is set based on the timing of weft picking which is deviated from the actual one, the weft flies up to a predetermined location of that sub-nozzle before it starts jetting the pressure air (fluid) in the process of the weft inserting, in other words, so-called insufficient preceding jet angle takes place.
  • the weft goes into a stall and the weft inserting is apt to become unstable.
  • the pressure air comes to be uselessly jetted from the sub-nozzle, which leads to the increase in the pressure air consumption amount.
  • the flying start timing of the weft that is, the actual timing of weft picking is under the control of the jet start timing of the main nozzle and the release timing of the weft engaging pin.
  • the actual timing of weft picking is a parameter indicative of whether the setting of weft inserting (i.e. said set timing of the main nozzle and the weft engaging pin) is good or not, it is widely used not only for setting the jet timing of the sub-nozzle but also for adjustment of the weft inserting, as described above.
  • an object of the invention is to obtain the timing of weft picking most approximated to the actual value by calculation, based on the known weft inserting condition.
  • the inventors of this invention have invented the following method of calculation as a result of their best efforts.
  • a calculation method is applicable to calculation of the timing of weft picking in a fluid jet loom of the class wherein there are provided a weft inserting nozzle which is supplied with a pressure fluid enabling normal weft inserting to be performed and jets the pressure fluid together with a weft in connection with a weft inserting command, and a weft engaging member for controlling the weft length, said weft engaging member being arranged on a weft length measuring storage unit and releasing the weft in connection with the fluid jet start by the weft inserting nozzle.
  • Such calculation method includes calculation of the timing of weft picking for the weft to enter a warp shed based on set values of known weft inserting conditions.
  • Set values of the weft inserting conditions include the jet start timing of the weft inserting nozzle, the weft release timing of the weft engaging member, and either the rotational number of the main shaft of the fluid jet loom or the pressure value of the pressure fluid.
  • the timing of weft picking is calculated based on set values of the known weft inserting condition, that is, the jet start timing of the weft inserting nozzle, the weft release timing of the weft engaging member, and either the rotational number of the main shaft of the fluid jet loom or the pressure value of the pressure fluid, which similarly affects the performance of accelerating the weft. Accordingly, even if the weft release timing of the weft engaging member is set earlier or later than the jet start timing of the weft inserting nozzle due to the sort of the weft, it is possible to obtain the timing of weft picking most approximated to the actual measurement value without carrying out actual measurement by means of the strobe flash technique.
  • the invention does not necessarily premise only the state where the loom 10 is steadily operated. It adequately takes account of such a state that the loom is operated in a transition state, for instance, the state of starting up the loom, the state of changing the rotational number of the main shaft of the fluid jet loom, and so forth.
  • the weft engaging member may include at least either a weft engaging pin of the weft measuring storage unit of the fixed drum type or a clamper arranged between the weft length measuring storage unit and the weft inserting nozzle.
  • a weft engaging pin of the weft measuring storage unit of the fixed drum type or a clamper arranged between the weft length measuring storage unit and the weft inserting nozzle.
  • the timing of weft picking can be calculated based on the following expression (1).
  • T A ⁇ x + B ⁇ y + C ⁇ z + D
  • the timing of weft picking can be calculated based on the following expression (2).
  • T A ⁇ x + B ⁇ y + E ⁇ z + F
  • timing of weft picking is calculated by using the above expressions (1) and (2), it becomes possible to obtain the almost same timing of weft picking as that which is attained by actual measurement using the strobe flash technique
  • a plurality of values of coefficients A, B, C, D or A, B, E, F in the above expressions (1) and (2) are set in advance corresponding to at least either the sort of the weft or the thickness of it, and when calculating the timing of weft picking, predetermined coefficients are selected corresponding to at least either the sort of the weft or the thickness of it.
  • a plurality of values of coefficients A, B, C, D or A, B, E, F in the above expressions (1) and (2) are set in advance corresponding to at least either the sort of the weft inserting nozzle or the number of it, and when calculating the timing of weft picking, predetermined coefficients are selected corresponding to at least either the sort of the weft inserting nozzle or the number of it.
  • the timing of weft picking most approximated to the actual measurement value can be obtained by only selecting coefficients which are stored in advance in response to the above change and applying those coefficients to the expressions (1) and (2).
  • a method of setting weft inserting condition according to the invention is for use in a fluid jet loom of the class wherein there are provided a plurality of sub-nozzles are arranged so as to pass through the warp shed and the jet start timing of one or more sub-nozzles is calculated based on the timing of weft picking which is calculated according to any one of the calculation methods as mentioned above.
  • a proper setting value of the jet timing of the sub-nozzle group can be obtained by calculating the jet start timing of sub-nozzle based on the above expression (3).
  • the form of the sub-nozzle group is determined based on how many sub-nozzles a switching valve manages, for instance one form wherein a switching valve is provided corresponding to each of sub-nozzles, in other words, on the basis of the one-to-one correspondence and the other form wherein one switching valve manages two or more sub-nozzles, in other words, on the basis of the one-to-multiple correspondence.
  • the number of the objective sub-nozzle groups of which the jet timing is to be set may be only one sub-nozzle, plural sub-nozzles, or all of them.
  • the jet timing of one or more specific sub-nozzle groups it may be possible to set the jet timing of only the nozzle group on the side near the weft length measuring storage unit or only the nozzle group on the side near the side opposite to the weft inserting side by making use of the above calculation method.
  • the jet timing of remaining sub-nozzle groups may be set manually.
  • a weft 12 extending from a weft package 14 is wound around the fixing drum 20 of a weft length measuring storage unit 16 (referred to "weft length measuring storage drum 20" hereinafter) and is stored there after its length is measured.
  • the leading end portion of the weft 12 is inserted into the weft inserting nozzle i.e. a main nozzle 18, which blows off the weft 12 by means of the compressed air supplied thereto and jetted therefrom.
  • the weft length measuring storage unit 16 winds the weft 12 around the weft length measuring storage drum 20, controls the weft by a weft engaging pin 22 such that the weft once wound around the drum 20 is not unwound therefrom as long as the weft engaging pin 22 works effectively.
  • the weft engaging pin 22 is constituted so as to engage with the drum 20 to control the length of the weft to be unwound therefrom.
  • the weft engaging pin 22 is operated by an electromagnetic solenoid.
  • the weft length measuring storage unit 16 disengages the weft engaging pin 22 from the drum 20, thereby the weft 12 being unwound from the drum 20 by a length (unwinding turns of the drum 20) necessary for one weft inserting operation.
  • a clamper (not shown) between the weft length measuring storage unit 16 and the main nozzle 18 to clamp the weft 12, thereby enabling the clamper to substantially act as a weft engaging member.
  • the weft length measuring storage unit 16 uses the clamper together with the weft engaging pin 22. To unwind the weft 12 from the weft length measuring storage drum 20 and to make the weft 12 free from the clamper is described by commonly using a term "release" and derivatives of it hereinafter.
  • the timing of disengaging the weft engaging pin 22 and the release timing of the weft from the clamper are compared with each other and the later timing is defined and used as the weft release timing.
  • a pool-case and an RDP are known as a weft length measuring storage unit using the clamper. These units measure the length of the weft by a length measuring roller and then, hold and store the measured weft in the air stream by clamping it until the weft inserting starts.
  • the main nozzle 18 is connected with a compressed air supply source 24 through several fluid control members.
  • the compressed air from the compressed air supply source 24 is supplied to the main nozzle 18 through a pressure regulator 26, an air tank (not shown), and an electromagnetic switching valve 28.
  • the compressed air supplied to the main nozzle 18 inserts the weft 12 into a warp shed formed by a lot of warps divided into two warp groups 30 made up of upper and lower warp groups.
  • the main nozzle 18 is firmly, immovably but detachably fitted to a reed slay (not shown) which is equipped with a reed 46.
  • a plurality of sub-nozzles 32 are also fitted to the above reed slay in the same manner as the main nozzle 18, that is, they are also firmly, immovably but detachably fitted to the reed slay. These sub-nozzles jets the weft only for further energizing the flying force of the weft.
  • These sub-nozzles 32 are provided along the weft flying course and are divided into a plurality of sub-nozzle groups in the weft inserting direction from the warp shed on the weft inlet side toward the warp shed on the weft outlet side such that each of sub-nozzle groups includes the respectively designed number of sub-nozzles.
  • the sub-nozzles 32 are divided into 8-sub-nozzle groups, which we call the first sub-nozzle group, the second sub-nozzle group, ..., the seventh sub-nozzle group and the eighth sub-nozzle group, in the order from the weft inserting side, respectively.
  • Each of the first through the seventh sub-nozzle groups includes five sub-nozzles while the eighth sub-nozzle group includes three sub-nozzles.
  • the pressure air from the pressure air supply source 24 is supplied to sub-nozzles 32 constituting each sub-nozzle group through the pressure regulator 26, the air tank and the electromagnetic switch valve 28, each of which corresponds to each sub-nozzle group on the basis of the one-to-one correspondence. Therefore, this makes it possible to set the pressure of the pressure air supplied to the sub-nozzle groups on the group by group basis.
  • the pressure regulator 26 there are not always necessary for the pressure regulator 26 to be arranged so as to correspond to the sub-nozzle group on the one-to-one basis.
  • one pressure regulator 26 may be arranged so as to manage a plurality of sub-nozzle groups or entirety of the sub-nozzle groups. The same thing can be said about the air tank.
  • the weft engaging pin 22 and the switching valve 28 are driven by an electromagnetic means such as an electromagnetic solenoid.
  • an electromagnetic means such as an electromagnetic solenoid.
  • the invention is not limited to this driving system.
  • a weft filler 34 and a stretch nozzle are provided on the side opposing to the weft feeding side such that both of them are firmly, immovably, but detachably fitted to the reed slay.
  • the weft filler 34 detects that the leading end portion of the weft 12 is rightly inserted up to the final position thereof, and the stretch nozzle jets the pressure air for giving tension to the weft 12 having been inserted into the warp shed.
  • the rotational angle of the main shaft 36 of the air jet loom 10 is detected at a real time by an encoder 38 and the detected angle is transmitted to a weft inserting control unit 40 as a crank angle signal.
  • the weft control unit 40 controls, with proper timing, the weft engaging pin 22, respective switching valves 28 for the main nozzle and sub-nozzle groups, and also the switching valve for the weft stretch nozzle, based on the weft inserting condition which is set in advance by a setting unit 44.
  • the main shaft 36 of the air jet loom being turned, the reed 46 is driven to start beating up through a crank mechanism (not shown) and others.
  • the main nozzle 18, a plurality of sub-nozzles 32 and the weft filler 34 are moved toward the cloth fell side along with the reed 46.
  • the weft length measuring storage drum 20 is engaged with the weft engaging pin 22.
  • the weft 12 is wound around the circumferential surface of the drum 20 and stored there.
  • the leading end portion of the weft 12 is previously inserted into the main nozzle 18 such that the leading end portion projects from the end on the weft outlet side of the main nozzle 18.
  • the weft 12 comes in a state where it is ready to be released from the drum 20. In this state, the weft 12 is jetted out of the main nozzle 18 along with the pressure air toward the warp shed to be inserted therein, and then, the leading end portion of the weft 12 flies toward the opposite side to the weft inserting side with the help of the relay jet performed by a plurality of sub-nozzle groups.
  • the weft release sensor 42 detects the weft 12 unwound and released from the above drum 20 and transmits the weft release signal to the weft inserting control unit 40.
  • the weft inserting control unit 40 counts the weft release signal to examine and confirm whether or not the weft is rightly released by a predetermined length equivalent to one weft picking length. If confirmed, the electromagnetic solenoid is driven to engage the weft engaging pin 22 with the weft length measuring storage drum 20, thereby preventing the weft 12 from being further released from the drum 20. In this way, the weft inserting is carried out with the weft 12 having a length which is rightly measured so as to be equivalent to one weft picking length.
  • the weft filler 34 detects the weft 12 and transmits a signal telling that the weft inserting has been duly completed to the weft inserting control unit 40.
  • the portion of the weft 12 as has been inserted into the warp shed formed by warps 30 is moved toward the cloth fell by the reed 46 and is then beaten up against the cloth fell finally.
  • the leading end portion of the weft 12 as has been inserted into the warp shed is further blown away by the pressure air current from a stretch nozzle (not shown) which is arranged outside the last one warp 30 on the opposite side to the weft inserting side, thereby tension being given not only to the leading end of the weft 12 but also to the other portion of the weft 12 having been inserted into the warp shed.
  • the weft 12 is cut by a cutter 50 and separated from the fabric being woven.
  • a setting unit 44 has a box shaped appearance as a whole and includes a display 54 arranged on the front side of it.
  • the display 54 is able to display the state of the setting unit 44.
  • a memory card 56 is exchangeably connected with a card interface 60 (referred to as "card I/F" hereinafter) as shown in Fig. 3.
  • a program for automatically setting coefficients A, B, C, D, E, F and the jet timing of the sub-nozzle in correspondence with the sort of a weft is renewably set up in the setting unit 44.
  • the memory card 56 is utilized for renewing the program for setting the jet timing of the sub-nozzle corresponding to the weft sort, and is also utilized for reading the record of set values corresponding to the same.
  • FIG. 2 there are shown on the left side of the display 54 (Fig. 2) five operational menu keys 62 of the push button type as aligned vertically. Each of five menu keys 62 is provided with a label put on the upper side of each operational menu key 62 indicative of respective sorts of them. These labels read “Host”, “Operate”, “Set”, “Preserve”, and “Weave” in order from upside to downside.
  • Each of eight function keys 64 are laterally aligned at a short distance from the lower side of the display 54 to be in parallel therewith.
  • Each of eight function keys 64 has a length of about 1/8 of the lower side of the display 54.
  • Each of eight function keys 64 is given a sign, which reads "f ⁇ 1", “f ⁇ 2", ⁇ , "f ⁇ 8" in order from left to right.
  • the cursor key 66 acting as an input means is located on the underside of the eight function keys 64.
  • the cursor key 66 is used for moving the cursor appearing on the screen of the display 54 in the desired direction within the range of the screen.
  • Fig. 3 shows an internal circuit 70 as used in the setting unit 44.
  • the internal circuit 70 includes the display 54, the card I/F 60, an input unit 72 in the form of a keyboard which includes various keys 62, 64, 66 and 68 as described above, a central processing unit (referred to as “CPU” hereinafter) 74, an input and output port (referred to “I/O port” hereinafter) 76 connected with the CPU 74, and a main memory (referred to as “memory unit” hereinafter) 78 connected with the CPU 74.
  • CPU central processing unit
  • I/O port input and output port
  • main memory unit main memory
  • the CPU 74 is connected with the card I/F 60, the display 54, the input unit 72 and the weft control unit 40.
  • the CPU 74 is also connected with the memory unit 78 through an internal wiring.
  • the operator can interactively input various values for setting the weft inserting condition by properly operating the cursor key 66 as well as the ten-key set 68 to numerically input necessary values in response to various image forms as displayed on the display screen.
  • the operator is able to have the display 54 displayed various information relating to the information on the operational state, the preservation state, the weaving state and others with regard to the air jet loom 10.
  • the setting unit 44 is connected with various units (not shown) other than the weft inserting unit of the air jet loom, for example, a let-off motion for controlling the tension given to the warp, a take-up motion for controlling the intermittent or continuous winding-up of the woven fabric, a main control unit for controlling the entire operation of the air jet loom such as the start and stop motion thereof. Therefore, the setting unit 44 is constituted such that it can interactively input suitable set values to each of the above units by carrying out the interactive input in the same manner as described above.
  • the air jet loom operator calls an image 80 as shown in Fig. 5 on the screen of the display 54 and inputs the values of various parameters as indicated in the image 80 to the setting unit 44 in the way as will be described later (Step 1).
  • the image 80 corresponds to the case where an air jet loom for use in the 4-color weft inserting is used for the 2-color weft inserting.
  • headword "Basic Setting: Weft” relating to contents now to be set, and the date and time as "2002, 03, 13. 12:25", illustratively.
  • set item In the wide space under the above headline space of the image 80, there are enumerated various objective items to be set (referred to as “set item” or “set items” hereinafter).
  • set item In the uppermost portion of the above wide space, there are laterally aligned a plurality of set items "Weft Color”, “Weft Sort”, “Release Number”, “Weft Picking (°)”, “Objective Weft Arrival (°)”, and “Fluid Pressure MPa”, which respectively indicate a weft color (number of the main nozzle), a weft sort, the number (turns) of release, a picking timing, an objective arrival angle and a fluid pressure with regard to each weft.
  • the value (set value) of each set item corresponding to the weft color is inputted to a corresponding rectangular frame.
  • a corresponding rectangular frame In the example as shown in Fig. 5, as the air jet loom is set in advance for 2-color weft inserting use, only rectangular frames corresponding to weft colors "C1" and "C2" are filled up with set values as inputted.
  • the information on various sorts of the weft for example "chemical fiber filament yarn”, “strong twisted yarn”, “cotton yarn 20/1S”, “cotton yarn 40/1S”, “cotton yarn 50/1S” and so forth is stored in advance in the memory unit 78. Therefore, the operator is able to obtain necessary information thereabout from the memory unit 78 by using the cursor 66.
  • the weft is made up of various elements as known well. However, some of them give an ill influence to the weft flying characteristic in the weft inserting process.
  • the following are considered as ill elements like that, for instance, the raw material of the weft, the thickness of it, the doubling ratio of it, the cross sectional shape of it, whether it twist-treated or not, whether it is stretch-treated or not, whether or not it has received sizing or oiling treatment, and so forth.
  • the weft sort may be set in detail on the basis of every element or only selected elements which are deemed to cause such ill influence with ease.
  • Each of signs “C1" to “C4" vertically aligned below the set item "Weft Color” is an ordinary number given to each of 4-color wefts to be inserted into the warp shed.
  • rectangular frames corresponding to "C3" and "C4" are kept in blank.
  • the set value of the timing (start timing) of weft picking is indicated in the rectangular frames vertically aligned below the set item "Weft Picking (°)”. This timing of weft picking is determined by using the rotational angle of the main shaft of the loom as a scale.
  • the set value of the objective weft arrival timing is indicated in the rectangular frames vertically aligned below the set item "Objective Weft Arrival (°)”. This objective weft arrival timing is determined also by using the rotational angle of the main shaft of the loom as a scale.
  • the set value of the fluid pressure supplied to the main nozzle is indicated in the rectangular frames vertically aligned below the set item "Fluid Pressure MPa”.
  • Three set items “Reed Drawing-in Width (cm)”, “Number of Sub-nozzles” and “Rotational Number of Loom (r. p. m.)” are laterally aligned in the about middle portion of the wide space of the image 80. Each set value of these three set items is indicated in each rectangular frame next to each of these three set items.
  • the set item “Reed Drawing-in Width (cm)” indicates the width of the fabric to be woven, in other ward, a distance W from one selvedge to the other as shown in Fig. 1.
  • the set item “Rotational Number of Loom (r. p. m.)” indicates the rotational number of the main shaft of the loom 10.
  • Sub-nozzle (G) indicative of an identification number given to each sub-nozzle group
  • Pitch (mm) indicative of a distance P between adjacent sub-nozzles 32 as shown in Fig. 1
  • Number of Sub-nozzles indicative of the number of sub-nozzles constituting each sub-nozzle group.
  • "Release Number” indicates the turning number of the weft length measuring storage drum 20 necessary for releasing or unwinding the weft 12 by a length needed for carrying out one weft picking.
  • the jet start timing of the sub-nozzle is set by making use of the value as set with regard to each of set items "Objective Weft Arrival (°)", “Fluid Pressure MPa”, “Reed Drawing-in Width (cm)", and “Number of Sub-nozzles”, and further making use of the set value of set items "Number of Sub-nozzles” and “Pitch (mm)” with respect to the sub-nozzle group.
  • the operator operates the cursor key 66 to move the cursor on the image 80 to a predetermined rectangular frame of the set item "Weft Sort” and selects an objective yarn sort. Furthermore, the operator operates the cursor key 66 to move to each rectangular frame of set items "Release Number”, “Weft Picking (°)", “Objective Weft Arrival (°)", and "Fluid Pressure MPa” corresponding to "C1" to "C4" of the set item "Weft Color”. Then, the operator inputs necessary values to each of the rectangular frames by using the ten-key set 68. With this, the Step 1 is completed.
  • Fig. 5 shows a state where the set item "Weft Sort” are set to be a value of "cotton 40/1S" equally for “C1” and “C2", the set item “Release Number” is set to be a value of 3 equally for “C1” and “C2”, the set item “Objective Weft Arrival (°)” is set to be a value of 210 equally for “C1” and “C2”, and the set item “Fluid Pressure MPa” is set to be values of 0.30 and 0.29 so as to correspond to "C1” and “C2", respectively.
  • Fig. 5 shows that the same setting is rightly done in the setting unit 44.
  • the operator pushes the function key "f ⁇ 3" assigned to the menu "Weft Inserting” to change the image 80 now on the screen of the display 54 as shown in Fig. 5 to an image 82 as shown in Fig. 6, and then inputs the weft inserting condition by operating keys of various sorts (Step 2).
  • Each timing (ON and OFF) of set items "Weft engaging pin", "Main”, “Auxiliary Main” and “Cutting” is set on the basis of the rotational angle of the main shaft 36 of the loom with regard to each of weft colors [C1] ⁇ [C4].
  • the set item "ON” and “OFF” of the set item "Weft engaging pin” indicate the release timing and the stop timing of the weft 12 as stored around the weft length measuring storage drum 20, respectively.
  • the set item “Main” stands for the main nozzle 18, and “ON” and “OFF” of it indicate the jet start timing and the jet end timing of the main nozzle, respectively.
  • the set item “Auxiliary Main” stands for an auxiliary nozzle which is provided between the clamper and the main nozzle 18 in the same way as the main nozzle 18 into which the weft 12 is inserted.
  • “ON' and “OFF” of set item “Auxiliary Main” indicate the jet start timing and the jet end timing of it, respectively.
  • Fig. 6 indicates a state where "ON' and “OFF” of the set item "Weft engaging pin” are set to be values of 60 and 180, “ON” and “OFF” of the set item “Main” are set to be values of 70 and 190, “ON' and “OFF” of the set item “Auxiliary Main” are set to be values of 70 and 190, and “ON' and “OFF” of the “Cutting” are set to be values of 320 and 30, respectively with regard to weft colors [C1] and [C2].
  • the set item "Cutting” indicates the jet timing of the main nozzle 18 for preventing the weft 12 tensioned at the beating-up time from slipping out of the main nozzle 18 when the weft 12 is cut by the cutter 50.
  • "ON” and “OFF” of the set item “Cutting” indicate the start and end timing of the air jet from the main nozzle 18, respectively, at the time of cutting the weft 12 by the cutter 50.
  • the function key menu "Sub_1",..., "Sub_4" indicate that an image for setting the jet timing of the sub-nozzles corresponding to the "C1" to "C4" of the set item "Weft Color” can be called on the display screen by operating function keys "f ⁇ 2", ..., "f ⁇ 5".
  • the condition as described above can be set by using the cursor key 66 and the ten-key set 68 after touching the corresponding key of the function keys 64.
  • the operator pushes the function key "f ⁇ 8" assigned to the menu "Picking Calculation” to instruct the CPU 74 to calculate the timing of weft picking by means of the main nozzle 18.
  • the operator can explicitly select either an expression (1) or (2) for obtaining the timing of weft picking T.
  • the timing of weft picking is calculated by means of the expression (1) or (2) based on the values which have been already inputted by using images 80 and 82 with regard to the jet start timing of the main nozzle 18, the weft release timing by the weft engaging pin 22, and the rotational number as set of the main shaft 36 of the loom 10 or the pressure value of the pressure fluid.
  • T A ⁇ x + B ⁇ y + C ⁇ z + D
  • T A ⁇ x + B ⁇ y + E ⁇ v + F
  • the expression (1) is obtained by replacing the pressure value v of the pressure fluid of the expression (2) by the rotational number z of the main shaft. If the rotational number of the main shaft 36 is set high, a period of time during which the warp shed is kept open is made short. Therefore, the weft 12 is required to complete its flight as fast as possible and the pressure value of the pressure fluid for flying the weft 12 is required to be set at a high value. In other words, as the rotational number z of the main shaft and the pressure value of the pressure fluid necessary for the weft inserting are mutually related with each other, the rotational number of the main shaft 36 is determined from the pressure value of the pressure fluid necessary for the weft inserting without any other condition. Accordingly, as described above, the expression (1) is obtainable by replacing the pressure value v of the pressure fluid jetted from the main nozzle 18 of the expression (2) with the rotational number z of the main shaft.
  • Predetermined coefficients A, B, C, D, E and F are calculated and memorized in advance based on the sort or the thickness of the weft as well as on the sort or the number of the main nozzle 18. Calculation is carried out according to a method as described later by using values as actually measured in advance.
  • delayed response issue is caused with regard to the movement of the switching valve, that is, the delayed valve movement caused by that the valve can not completely open or close as soon as it receives a signal for opening or closing the valve (i.e. switching signal) from the weft control unit 40.
  • a means e.g. delayed response compensating software of the built-in type which can compensate such delayed response and drive the electromagnetic actuator for the switching valve 26 at the timing of weft inserting as calculated by means of the above expression (1) or (2). Therefore, there is no need for such response delay to be considered with respect to expressions (1) and (2) as well as their coefficients.
  • the timing of weft picking as calculated by means of the above expression (1) or (2) can be confirmed by displaying the image for setting the weft inserting condition as shown in Fig. 5 or images as shown in Figs. 6 and 7 described later.
  • the operator may make use of the timing of weft picking obtained from these images for setting the weft inserting condition as the jet condition of the weft inserting nozzle of the weft inserting unit in the other loom.
  • Step S5 If the operator prefers not to automatically set the jet timing of sub-nozzles, he may proceed to the Step S5. If he likes to do it automatically, he may proceed to the Step S6.
  • the value of the calculated timing of weft picking T is also displayed in the corresponding rectangular frame of the set item "Weft Picking (°)" in the image 80.
  • the operator can judge whether the setting of the weft inserting unit is good or not, based on the value of the timing T.
  • the operator may do such that the image now on the display screen is automatically changed to the image 80 as shown in Fig. 5 after completing the calculation of the timing of weft picking, thereby displaying the calculated value of the timing of weft picking T in the corresponding rectangular frame of the set item "Weft Picking (°)".
  • Fig. 7 shows the image 84 displaying various values as set now of the jet timing of various sub-nozzles with regard to the weft color "C1".
  • the headline space of the image 84 contents now to be set are displayed.
  • [Setting of Timing of Weft Inserting] [Sub_Color-1] and the date "2002, 03, 13, 12:25” are shown in the headline space.
  • the most wide middle space of the image 84 displays the jet start timing "ON' and the jet end timing "OFF" for each of sub-nozzle groups in case of the weft color "C1". Respective values of the jet start timing and jet end timing are indicated in corresponding rectangular frames. In this embodiment, as sub-nozzles are divided into eight groups “Sub 1" through “Sub 8", the rectangular frames corresponding to "Sub 9" is kept open.
  • the set item "Stretch” in the image 84 indicates the jet start timing "ON' and the jet end timing "OFF" of the stretch nozzle giving tension to the weft 12 having been inserted into the warp shed.
  • the image 84 can be changed to an image 86 shown in Fig. 8 by pushing the function key "f ⁇ 1" assigned to the menu “Change” of the image 84.
  • the headline space of the image 86 contents of this image are displayed.
  • [Weft Inserting Adjustment] and date the date "2002, 03, 13, 12:25" are shown in the headline space.
  • the jet start/end timing of the sub-nozzle group as now selected is indicated in the lower part of the image 86.
  • the jet start/end timing of each sub-nozzle is displayed in the form of a graph occupying the approximately middle part of the image 86 so as to be recognized at a glance (Step 6 in Fig. 4).
  • the abscissa of the graph indicates the rotational angle (°) of the main shaft 36 of the loom while the ordinate indicates the reed width (reed drawing-in width) W (cm), and the jet start/end timing of each sub-nozzle group is indicated in the form of a rectangle.
  • the image 86 also shows three thin rectangles elongated in the direction from left to right. They are put one upon another so as to form three steps under the abscissa of the above graph.
  • the left and right ends of the top rectangle indicate the jet start/end timing of the main nozzle 18, the left and right ends of the middle rectangle indicate the release/engagement timing of the weft engaging pin 22, and the left and right ends of the bottom rectangle indicate the operation start/end timing of WBS.
  • WBS stands for a weft break control unit, which is provided between the clamper and the main nozzle and is able to decrease the velocity of the flying weft by bending the weft 12.
  • a long rectangle elongated in the direction from left to right is displayed above the right upper part of the graph.
  • the right and left ends of this rectangle indicate the jet start/end timing of the stretch nozzle.
  • the operator can individually change the set value of the jet start/end timing of each sub-nozzle group by selecting and touching an objective icon shown on the image 86 and then inputting a new set value by means of the ten-key set 68.
  • a plurality of icons vertically aligned on the most right side of the image 86 are given ordinal numbers 1 through 8 so as to correspond to the sub-nozzle group number.
  • the example as shown in Fig. 8 indicates the state where the icon No. 1 is selected.
  • the operator prefers to change the calculation results as shown on the image 86, he can do it in the following way.
  • the operator first selects one of sub-nozzle group icons by touching either one of two black triangular icons appearing between the graph and the eight icons vertically aligned on the image 86 and then changes the value of the jet start/end timing of the selected sub-nozzle group.
  • the upper triangular icon is used for moving the icon selection pointer in the direction toward the icon No. 1 while the lower one is used for moving the icon selection pointer in the reverse direction i.e. toward the icon No.1.
  • the operator touches a touch key "All Sub" on the left side of the icon No. 8 he can select all the sub-nozzle groups at a time and then change the value of the jet start/end timing of the selected sub-nozzle groups, if needed.
  • the operator can change the jet start/end timing of the selected sub-nozzle group by touching the following touch keys " ⁇ -ON”, “->ON”, “ ⁇ -OFF” and “->OFF” which are displayed on the lowest part of the image 86. If the operator touches " ⁇ -ON” and “ ⁇ -OFF”, the jet start/end timing of the selected sub-nozzle group is made faster, and if he touches "->ON” and "->OFF", the jet start/end timing of the selected sub-nozzle group is made slow. In this embodiment, it is set such that the rotational angle of the main shaft 36 is increased or decreased by a several degrees (°) at every one touching either touch key.
  • the image now on the display screen can go back to the image 84 (Fig. 7) by touching a touch key "END" shown at the lowest right corner of the image 86.
  • Calculation of the jet timing of each sub-nozzle is carried out by pushing the function key "f ⁇ 7" assigned to menu "Automatic Setting" of the image 82 (Fig. 6), thereby instructing the CPU 74 to calculate the jet timing of the sub-nozzle.
  • the jet start timing of each sub-nozzle group is calculated by the following expression (3) by using the distance L(i) as obtained with regard to each sub-nozzle group.
  • SV(i) T + (L(i) ⁇ (TG - T - G)/W) - H wherein,
  • TG is 210° from the value of the set item "Objective Weft Arrival (°)" as shown in Fig. 5.
  • Values "1ms” and “4ms” as used for calculating the coefficients G and H are empirical values to the last, which are attained through the experiences with the loom manufactured by Tsudakoma Kogyou K.K. and these values are usually within the range of several ms.
  • the jet end timing of each sub-nozzle group is calculated by an expression SV(i) + (60° ⁇ 70°).
  • the image 84 indicates a calculation result in which the jet end timing which are calculated by using an expression SV(i) + 60°.
  • An image 88 as shown in Fig. 9 indicates the jet start/end timing as calculated with regard to each sub-nozzle group by using the expression (3).
  • the image 88 has the same image constitution as the image 84 as shown in Fig. 7.
  • the expressions (1) and (2) for calculating the timing of weft picking are derived by the inventors paying attention to the point that the timing of weft picking T depends on other things than the jet start timing of the weft inserting nozzle.
  • the contents of the above compensation term 1 depends on the weft inserting condition (e.g. the weft release timing of the weft engaging pin) and the rotational number of the main shaft of the loom. This would be supported by some tests as described later.
  • T x + ⁇ (y - x) + ⁇ z + ⁇
  • the tests are carried out with an air jet loom ZAX (Product name of Tsudakoma Kogyou K.K.).
  • the timing of weft picking is measured by means of the stroboscopic flash under the condition where the reed drawing-in width W is 170 cm, the jet start timing x of the weft inserting nozzle is 80° (rotational angle of the main shaft), and the weft release timing of the weft engaging pin is varied from 60° ⁇ 100° (rotational angle of the main shaft) at an interval of 10°.
  • wefts which are a chemical fiber yarn BB (Bemberg) 84dtex, a twisted yarn PE (Polyester) 84dtex/twist number 1000 t/m, a cotton yarn C20/1S, a cotton yarn C40/1S, and a cotton yarn C50/1S.
  • the computer-aided multiple regression analysis using the expression (4) as the regression expression is carried out with regard to the measured values obtained through the tests, thereby obtaining the values of regression coefficients ⁇ , ⁇ and ⁇ and computing the value of a multiple correlation coefficient as well.
  • the multiple regression analysis and the calculation of multiple correlation coefficients are carried out by adopting the algorism as known well.
  • Table 1 shows the values of the regression coefficients ⁇ , ⁇ and ⁇ and the multiple correlation coefficients obtained on the basis of respective measurement values of T, x and y in respect of each of the above five sorts of wefts. Furthermore, Table 1 indicates the average values of the regression coefficients ⁇ , ⁇ and ⁇ as well as the multiple correlation coefficients, which represent all of the above-mentioned three sorts of cotton yarns i.e. C20/1S, C40/1S and C50/1S.
  • A 1- ⁇
  • B ⁇
  • C ⁇
  • D ⁇
  • coefficients ⁇ , ⁇ and ⁇ as shown in Table 1 are replaced by coefficients A, B, C, and D of the expression (5), that is, the expression (1), coefficients A, B, C, and D come to take values as shown in Table 2.
  • Each of coefficients A, B, C, and D as shown in Table 2 is set and stored in advance in the memory unit 78 in correspondence with the sorts of wefts, and when calculating the timing of weft picking, the coefficient is selected corresponding to the sort of the weft.
  • Table 3 indicates the value of the timing of weft picking as actually measured, the value of the timing of weft picking as calculated by means of the expression (1), and the difference (error) between the above two values, with respect to each of the chemical fiber yarn and the twisted yarn.
  • Table 4 indicates the value of the timing of weft picking as actually measured, the value of the timing of weft picking as calculated by means of the expression (1) using the coefficients for each cotton yarns and the average coefficients for all the cotton yarns, and errors between the actually measured value and the value as calculated by the expression (1), with respect to respective cotton yarns.
  • the weft release timing of the weft engaging pin 22 is set within the range of ⁇ 10% of the jet start timing of the main nozzle 18 (sign * in Table 4). In such range, the error between the measured value and the calculated value is within the range of ⁇ 5°. Accordingly, even if there are adopted coefficients A, B, C and D which are obtained by calculation without paying any consideration to the weft thickness, it is deemed that they would be practically usable within the setting range as actually carried out.
  • each of coefficients A, B, E and F of the expression (2) for calculating the timing of weft picking can be obtained by a procedure similar to that which is mentioned above.
  • Each of these coefficients A, B, E and F is set in advance corresponding to the pressure value of the pressure fluid, and the predetermined coefficients can be selected when calculating the timing of weft picking.
  • the timing of weft picking is not only used for setting the jet timing of the sub-nozzle 32 but also used for adjustment of the weft inserting. Furthermore, the timing of weft picking is made use of not only in the air jet type loom but also in the liquid jet type loom. Still further, the timing of weft picking is utilized in the fluid jet loom which is provided with the weft length measuring storage unit 16 of the other type than the fixed drum type (for example, the type of using the clamper in place of the weft engaging pin).
  • CMOS Compact Flash Card
  • SM Smart Media
  • MMC Multi Media Card
  • SD Security Digital Memory Card
  • MS card Memory Stick Card
  • the timing of weft picking is influenced by some factors, for instance, the sort and number of the weft and the sort of the main nozzle 18, whether or not there is provided an auxiliary main nozzle, and so forth. Accordingly, if the coefficients are selected so as to correspond to these influential factors, the timing of weft picking can be calculated with higher accuracy. Besides, if it is required to store a lot of coefficients, the setting unit 44 may store them once in the host computer with a large memory capacity and read out necessary coefficients therefrom in response to the need.
  • the calculated timing of weft picking is used for automatic setting of the jet timing of the sub-nozzle.
  • the application of the calculated timing of weft picking is not limited to the above. It is used for the setting of the operational timing of the other devices relating to the weft inserting, for example, a weft brake, a stretch nozzle and so forth.
  • the timing of weft picking has been described in connection with the rotational angle of the main shaft 36 of the loom.
  • this is done just as one of preferable ways of describing the timing of weft picking and does not exclude other way of description.
  • the timing of weft picking may be described on the basis of the passage of time counted from the time at which the main shaft 36 has passed a reference rotational angle as set in advance.
  • the weft inserting control unit 40 has to be constituted such that each switching valve and the electromagnetic solenoid is controlled by the passage of time counted from the moment at which the main shaft has passed the reference rotational angle.
  • the method of calculating the timing of weft picking according to the invention can be changed as follows.
  • the method of calculating the timing of weft picking as described above is practicable not only in the state where the loom 10 is steadily operated but also even when the loom is under the transition state, for instance, at the time of starting up the loom, at the time of changing the rotational number of the main shaft, and so forth. Needless to say, the actual measurement of the timing of weft picking is extremely difficult in such transition state. However, if the timing of weft picking can be calculated in such unsteady state, it becomes possible to easily judge whether the weft inserting condition is properly set or not.
  • the number of sub-nozzle group of which the jet timing is to be set may be only one, plural, or all of them.
  • the jet timing of one or more specific sub-nozzle groups it may be possible to set the jet timing of only the nozzle group near the weft length measuring storage unit side or only the nozzle group near the opposite side to the weft inserting side by making use of the above calculation method. In this case, the jet timing of remaining sub-nozzle groups may be set manually.
  • the method of calculating the timing of weft picking and the method of setting the weft inserting condition according to the invention are applicable not only to the air jet loom but also to the liquid jet loom.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP03025784A 2002-12-10 2003-11-11 Düsenwebmaschine zur Durchfüchrung eines Verfahrens zur Berechnung des Schusseintragszeitpunktes und eines Verfahrens zum Einstellen der Schusseintragsparameter Expired - Lifetime EP1428917B1 (de)

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JP2002358490A JP4022136B2 (ja) 2002-12-10 2002-12-10 緯糸打ち出しタイミングの算出方法及び緯入れ条件設定方法
JP2002358490 2002-12-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647618A3 (de) * 2004-09-06 2010-05-05 Tsudakoma Kogyo Kabushiki Kaisha Verfahren zum Einstellen von Einstellwerten in einer Webmaschine
EP2228470A3 (de) * 2009-03-09 2013-10-30 Tsudakoma Kogyo Kabushiki Kaisha Verfahren zum Einstellen von Schusseintragskonditionen einer Webmaschine mit Mehrfarbenschusseintrag

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JP5189731B2 (ja) * 2005-10-06 2013-04-24 津田駒工業株式会社 水噴射式織機
JP5027064B2 (ja) * 2008-06-23 2012-09-19 株式会社豊田中央研究所 ジェットルームにおける緯入れ方法
JP2013028870A (ja) * 2011-07-27 2013-02-07 Tsudakoma Corp 織機における製織方法及び製織装置
JP6145017B2 (ja) * 2013-02-27 2017-06-07 津田駒工業株式会社 水噴射式織機用の緯入れ情報の表示方法および装置
JP6328399B2 (ja) * 2013-02-27 2018-05-23 津田駒工業株式会社 水噴射式織機用の緯入れ情報の表示方法および装置
JP6283489B2 (ja) * 2013-02-27 2018-02-21 津田駒工業株式会社 織機用の情報表示方法および情報表示装置
JP6447533B2 (ja) * 2016-02-19 2019-01-09 株式会社豊田自動織機 エアジェット織機における緯入れ制御方法及び緯入れ制御装置
JP6106778B1 (ja) * 2016-03-04 2017-04-05 前多 株式会社 織物
CN108570750B (zh) * 2018-05-07 2020-10-30 杭州伊丝顿布艺有限公司 多功能户外用品纺织机械动力系统

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EP0414211A1 (de) * 1989-08-22 1991-02-27 Tsudakoma Kogyo Kabushiki Kaisha Schusseintragsregelsystem für Webmaschinen
EP0522846A1 (de) * 1991-07-09 1993-01-13 Tsudakoma Kogyo Kabushiki Kaisha Schusseintragkontrollverfahren und -vorrichtung in Düsenwebmaschine
DE4226693A1 (de) * 1991-08-12 1993-02-18 Nissan Motor Stroemungsduesen-webautomat und verfahren zu dessen steuerung

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US4732179A (en) * 1986-02-24 1988-03-22 Tsudakoma Corp. Automatic picking conditions regulating method and a device for carrying out the same
EP0414211A1 (de) * 1989-08-22 1991-02-27 Tsudakoma Kogyo Kabushiki Kaisha Schusseintragsregelsystem für Webmaschinen
EP0522846A1 (de) * 1991-07-09 1993-01-13 Tsudakoma Kogyo Kabushiki Kaisha Schusseintragkontrollverfahren und -vorrichtung in Düsenwebmaschine
DE4226693A1 (de) * 1991-08-12 1993-02-18 Nissan Motor Stroemungsduesen-webautomat und verfahren zu dessen steuerung

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Publication number Priority date Publication date Assignee Title
EP1647618A3 (de) * 2004-09-06 2010-05-05 Tsudakoma Kogyo Kabushiki Kaisha Verfahren zum Einstellen von Einstellwerten in einer Webmaschine
EP2228470A3 (de) * 2009-03-09 2013-10-30 Tsudakoma Kogyo Kabushiki Kaisha Verfahren zum Einstellen von Schusseintragskonditionen einer Webmaschine mit Mehrfarbenschusseintrag

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CN100371512C (zh) 2008-02-27
EP1428917A3 (de) 2004-08-25
EP1428917B1 (de) 2008-12-31
JP4022136B2 (ja) 2007-12-12
CN1506510A (zh) 2004-06-23
JP2004190165A (ja) 2004-07-08
DE60325548D1 (de) 2009-02-12

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