JP5592239B2 - Sub nozzle injection period setting method for air jet loom - Google Patents

Description

  The present invention relates to a method for setting an injection period (an injection start time to an injection end time) of a sub nozzle in an air jet loom.

  In an air jet loom, a large number of sub nozzles arranged along a weft insertion path perform air injection during a preset period, so that wefts injected from a main nozzle are inserted. In general, the plurality of sub-nozzles are divided into a plurality of groups in the order of arrangement, and the sub-nozzles belonging to the same group are connected to a common on-off valve and are simultaneously injected. Such a group is a “sub-nozzle group” in the present application. And as shown in FIG. 6, at the time of weft insertion, the injection period is set so that each sub nozzle group performs relay-like injection in the order of arrangement from the one on the yarn supply side.

  By the way, in general, the injection period of each of the sub-nozzle groups is set considering only the viewpoint of stabilizing the weft insertion. Therefore, the injection period is not always set to the necessary minimum, but is set excessively. There are cases. In other words, from the standpoint of stabilizing the weft insertion, the air injection period of each sub-nozzle group may be sufficiently long. In this case, the air injection amount increases, so energy saving (reduction of air injection amount). From the point of view, it is not preferable.

  Therefore, regarding the injection period of the sub-nozzle, there is a method disclosed in Patent Document 1 as a setting method aimed at stabilizing the weft insertion and reducing the air injection amount at a stroke. Hereinafter, the setting method of Patent Document 1 will be described in a simplified manner.

  First, with respect to the injection period set in advance for each sub-nozzle group, a change is made to advance the injection end timing so that the injection period of the sub-nozzle group closest to the yarn feeding side is reduced by a predetermined minute time. Then, weft insertion is performed in this state to detect the arrival timing of the weft, and if the detected value is equal to or less than the target value, the injection period of the sub nozzle group on the upstream side in the weft insertion direction is the same as described above. Changes are made. Conversely, if the detected value exceeds the target value, the change is returned to the original value and the setting is completed. If the detected value is equal to or less than the target value even when the change is made up to the sub-nozzle group on the most yarn feeding side, the changes are made again in order from the sub-nozzle group on the most anti-feed side. In this way, the injection end timing is changed in order from the sub-nozzle group on the non-feed side, and in the state where the arrival timing is below the target timing, that is, in the range where weft insertion is performed stably, air injection is performed. The amount is reduced.

Japanese Patent Laid-Open No. 5-86542

  The technical idea that can be read from the setting method of Patent Document 1 is to advance the injection end timing in order from the sub-nozzle group closest to the yarn feeding side. In this case, the reduction amount of the air injection amount of each sub-nozzle group positioned second and subsequent from the most counter yarn feeding side is the same as or smaller than the sub-nozzle group positioned downstream in the weft insertion direction. .

  However, such a setting method is not sufficient for reducing the air injection amount. Details will be described below.

  For the sub-nozzle group located on the counter-feeding side, not only is the weft transported, but it also urges the vicinity of the tip of the weft that is finally inserted by a predetermined length, and the weft is fed on the tip side. Plays a leading role. For this reason, there is a limit in reducing the injection period related to the air injection amount. If the injection period is excessively reduced, the weft is loosened before being constrained by the warp, and the fabric is disadvantageous.

  On the other hand, the sub-nozzle group located on the intermediate side in the weft insertion direction has less influence on the weft insertion (arrival time, looseness of the weft yarn, etc.) due to the reduction in the injection period from the sub-nozzle group on the counter feed yarn side. It is possible to greatly reduce the injection period.

  However, in the case of the setting method disclosed in Patent Document 1, unless the injection period of the sub-nozzle group on the counter yarn feeding side is reduced, the injection period of the sub-nozzle group on the yarn feeding side is not reduced more than that. The reduction of the injection period of the sub-nozzle group located at the position cannot be made larger than that of the sub-nozzle group located on the counter feed yarn side. Therefore, the air injection amount cannot be reduced sufficiently.

  The present invention was created in consideration of the above-mentioned circumstances, and the problem is that in an air-jet loom, the sub-nozzle injection period that can stabilize weft insertion and reduce the amount of air injection at a time It is an object of the present invention to provide a method for appropriately and easily performing the setting.

  The present invention forms a plurality of sub nozzle groups by dividing a plurality of sub nozzles arranged along a weft insertion path into a plurality of sub nozzles connected to a common electromagnetic on-off valve, and for each of the plurality of sub nozzle groups. It is assumed that each sub-nozzle group performs air injection in the injection period set to “2”, so that the weft yarn injected from the main nozzle is assisted by the air injection and is inserted into the weft.

  Further, the sub nozzle injection period setting method in the air jet loom includes a plurality of sub nozzle groups including a sub nozzle group closest to the yarn feeding side and a downstream sub nozzle group group including two or more sub nozzle groups. An upstream sub-nozzle group including two or more sub-nozzle groups and one or more intermediate-stream sub-groups including sub-nozzle groups excluding the sub-nozzle groups included in the downstream and upstream sub-nozzle groups. The sub-nozzle group group is divided into sub-nozzle group groups, and at least the middle-stream side sub-nozzle group group and the upstream-side sub-nozzle group group are targeted, and the reduction period of the injection period with a predetermined period as one unit is the target sub-nozzle group group By setting each individually The air injection amount reduction patterns including the individual injection period reduction modes for all the target sub-nozzle group groups are determined with different contents, and the determined plurality of air injection amount reduction patterns are stored in advance. It is arbitrarily selectable, and when setting the injection period of each sub-nozzle, the operator arbitrarily selects the plurality of air injection amount reduction patterns, and is set based on the selected air injection amount reduction pattern. The injection end timing in the set value of the injection period is corrected.

  The “setting value of the set injection period” may be an initial setting value obtained based on the set weaving conditions (for example, the rotational speed of the loom, the weaving width, the type of weft), It may be a set value after correcting the initial set value.

  The air injection amount reduction pattern is not limited to the one that reduces the injection period of all the target sub-nozzle groups, and any pattern that reduces at least one injection period among all the target sub-nozzle groups may be used. Therefore, for example, when the target sub-nozzle groups are the upstream side and the midstream side, the air injection amount reduction pattern indicates the mode of reduction of the injection period, and the substream nozzle group on the upstream side indicates “1” unit for the substream group group on the midstream side. A pattern with a unit of “0” for the group, a pattern with a unit of “0” for the sub-nozzle group group on the middle stream side, a pattern with a unit of “1” on the sub-nozzle group group on the upstream side, or a sub-nozzle group on the upstream / middle stream side A pattern or the like having a unit of “1” for both groups may be used. In addition to this example, there are those described below as suitable for reducing the air injection amount.

  The plurality of air injection amount reduction patterns reduce at least the injection period of the upstream sub-nozzle group group, and the reduction amount of the injection period in the midstream sub-nozzle group group corresponds to the reduction amount of the injection period in the upstream sub-nozzle group group. A first reduction pattern that is the same or smaller, and a second reduction pattern in which the amount of reduction in the injection period in the sub-nozzle group group on the middle stream side is larger than the amount of reduction in the injection period in other sub-nozzle group groups, To do.

  Further, the first reduction pattern includes a plurality of different reduction amounts as a whole in which the amount of reduction in the injection period in the upstream sub-nozzle group group is the same as the amount of reduction in the injection period in the substream nozzle group in the middle stream side. Including a reduction pattern, the second reduction pattern may include a plurality of reduction patterns having different reduction amounts in the ejection period in the sub-nozzle group group on the middle stream side.

The air jet loom is not limited to a loom equipped with a weft insertion device for performing one-color weft insertion, but is a loom equipped with a weft insertion device (multi-color weft insertion device) for performing multi-color weft insertion. There may be. Preferred examples of the present invention include those described below.
The air jet loom is a loom provided with a multi-color weft insertion device composed of a plurality of weft insertion series, wherein the injection end timing is corrected for each weft insertion series.

  According to the present invention, the operator arbitrarily selects an air injection amount reduction pattern without being restricted by the reduction amount of the injection period (air injection amount) in the sub nozzle group group on the downstream side, thereby reducing the air injection amount. Since the amount of injection can be set, for example, the injection period in the sub-nozzle group group on the middle stream side that has little influence on the weft insertion can be shortened, and the amount of reduction in air injection amount on the premise of realizing the desired weft insertion More effective settings can be made. In addition, since a plurality of air injection amount reduction patterns stored in advance can be arbitrarily selected and set, the setting by the operator can be easily performed.

It is explanatory drawing which shows the principal part in the weft insertion apparatus of an air injection type loom. It is explanatory drawing which shows the display screen of the setting display apparatus in the case of selecting an air injection amount reduction pattern. It is explanatory drawing which showed the air injection amount reduction pattern in detail. It is explanatory drawing which showed the air injection amount reduction pattern of the modification in detail. It is explanatory drawing which showed the air injection amount reduction pattern of the modification in detail. It is a graph which shows the general injection period of the sub nozzle in the conventional air injection type loom.

  FIG. 1 shows a main part of a loom equipped with a multicolor weft insertion device as an example of an air jet loom to which the present invention is applied. Although only three weft insertion sequences are shown in FIG. 1, a six-color weft insertion device that actually has six weft insertion sequences will be described, and the following description will be based on that assumption. The six-color weft inserting device corresponds to the multi-color weft inserting device of the present invention. In addition, the “weft insertion series” referred to here includes a plurality of weft insertion-related devices (the length measuring storage device 15, the main nozzle 20, the sub nozzle 21, etc.) that operate to realize one weft insertion in cooperation. Say the group to which it belongs. However, the sub nozzle 21 is common to all the weft insertion series.

  In the weft insertion device 11 of FIG. 1, the wefts 14 of the collars C1, C2, C3... Are drawn from the yarn feeder 13 supported by the yarn feeder stand 12, and are, for example, drum-type length measuring and storage devices 15. The yarn winding arm 16 is guided to the inside of the yarn winding arm 16 and is wound around the outer peripheral surface of the drum 17 by the rotational movement of the yarn winding arm 16 while being locked by the locking pin 18 on the outer peripheral surface of the drum 17 in a stationary state. Accordingly, the weft 14 having a length necessary for one weft insertion is wound around the outer peripheral surface of the drum 17 and stored until the weft 14 is inserted.

  The length measuring storage device 15 (the rotational movement of the yarn winding arm 16 and the forward / backward movement of the locking pin 18) and the main nozzle 20 for weft insertion described later are inserted into the weft insertion pattern by the weft insertion controller 44 of the loom controller 42. The operation is performed based on the weft selection order defined in (1).

  At the weft insertion start timing, the locking pin 18 corresponding to the weft 14 selected by the weft insertion control unit 44 is driven by the operating device 19 and retracted from the outer peripheral surface of the drum 17 to be wound around the outer periphery of the drum 17. The weft 14 having a length necessary for one weft insertion can be unwound on the drum 17. The weft thread 14 passed from the drum 17 to the main nozzle 20 for weft insertion is unwound from above the drum 17 and inserted by the main nozzle 20 performing an injection operation.

  The main nozzle 20 corresponding to the selected weft 14 starts to inject the pressurized air toward the opening 23 of the warp 22 at the set weft insertion start timing, and continues the injection over the set injection period. Thus, the weft 14 having a predetermined length is injected and inserted into the opening 23. By this weft insertion operation, the weft 14 flies along a weft insertion path in the opening 23. The pressure air is supplied from a pressure air source 32, adjusted to an appropriate air pressure for weft insertion by a pressure regulator 33, and then supplied to the main nozzle 20 via an electromagnetic on-off valve 34. The electromagnetic on-off valve 34 operates based on the weft selection order defined in the weft insertion pattern under the control of the weft insertion control unit 44.

  As described above, the weft insertion device 11 of FIG. 1 corresponds to the weft insertion of six colors, but in the case of weft insertion of two or more colors, the yarn feeder 13, the length measuring storage device 15, the main nozzle 20, etc. The weft inserting operation is performed according to the weft selection order set according to the number of multicolors (the number of wefts) and set in the weft insertion pattern. In the case of one-color weft insertion, only one yarn feeder 13, length measuring storage device 15, main nozzle 20 and the like are installed.

  In the process in which the weft 14 injected from the main nozzle 20 travels along the weft insertion path in the opening 23, the multiple sub nozzles 21 direct the pressure air in the weft insertion path in the direction in which the weft 14 travels. In this way, the flying weft 14 is assisted in the weft insertion direction. More specifically, the plurality of sub-nozzles 21 are arranged at intervals along the weft insertion path, and more than one (four in the illustrated example) from the yarn feeding side toward the counter yarn feeding side. ) Are connected to a common electromagnetic switching valve 36. Thus, one sub-nozzle group is formed by the plurality of sub-nozzles 21 connected to the common electromagnetic switching valve 36. In the figure, the sub nozzle groups are displayed as 1G, 2G,... Further, in FIG. 1, only four electromagnetic open / close valves 36 are shown, but in reality, 13 electromagnetic open / close valves 36 are arranged, and 13 sub-nozzle groups are formed. This will be described later.

  Further, the pressure air is supplied from the pressure air source 32, adjusted to an appropriate air pressure by the pressure regulator 35, and then supplied to the sub nozzles 21 of each sub nozzle group via each electromagnetic on-off valve 36. Each electromagnetic on-off valve 36 is under the control of the weft insertion control unit 44 at the time of weft insertion, and supplies pressure air to the sub nozzles 21 of the corresponding sub nozzle group during the set injection period (injection start time to injection end time). Then, compressed air is jetted from the sub nozzle 21 to assist the flying weft 14 in the weft insertion direction.

  When the weft yarn 14 is inserted normally by the injection operation of the main nozzle 20 and the sub nozzle 21 of each sub nozzle group, the weft yarn 14 is beaten on the pre-weaving 26 of the woven fabric 25 by the hammering movement of the kite 24. After being woven into the woven fabric 25, it is cut by the yarn feeding cutter 27 on the weft insertion side and separated from the weft 14 inside the main nozzle 20. Whether or not weft insertion has been performed normally is determined based on signals from the feeler heads 30 and 31 that detect the arrival of the weft yarn 14.

  The loom control device 42 includes a main control device 42a and a weft insertion control device 43 (including a weft insertion control unit 44 and a weft selection signal generation unit 45). In order to detect the rotation angle θ of the main shaft 40, an encoder 41 is connected to the main shaft 40, and the encoder 41 generates a signal of the rotation angle θ of the main shaft 40 during weaving, and this is used as a main controller 42a, and This is sent to the weft insertion control unit 44 and the weft selection signal generation unit 45 of the weft insertion control device 43.

  The main control device 42a performs control of the main movement of the loom and control at the time of stopping based on the signal of the rotation angle θ of the main shaft 40. The weft selection signal generation unit 45 of the weft insertion control device 43 grasps the weaving cycle of the loom based on the rotation angle θ from the encoder 41, and selects the weft 14 according to the weft selection sequence preset in the weft insertion pattern. The weft selection signal S1 corresponding to the selected weft 14 is sent to the weft insertion control unit 44. The weft insertion control unit 44 operates the weft insertion series length measuring and storage device 15 corresponding to the selected weft 14, the main nozzle 20, the sub nozzle 21, and the like under an appropriate rotation angle θ according to the set control value. And the weft insertion operation of the weft 14 selected by the corresponding weft insertion sequence is executed.

  The loom control device 42 described above is configured as a combination of functional blocks. The loom control device 42 may be realized by combining devices composed of blocks, or by installing predetermined software on a computer and executing the software, the computer's input / output means, storage means, arithmetic control It is also possible to configure each block in which the means and software cooperate and to realize the block.

  Further, a setting display device 46 as a setting device is provided so as to be capable of bidirectional communication in order to exchange data of weaving conditions and the like with the main control device 42a and the weft insertion control device 43.

  The setting display device 46 includes a setting display 47, a port 48, a memory 49 as a storage unit, and a CPU 50 as a processing unit. The port 48 receives data (including various signals) from the setting display 47, the CPU 50, and the loom control device 42, and transmits and receives data among them.

  The memory 49 is rewritable. The memory 49 stores a program for controlling the touch panel type setting display 47 and other necessary software, and other necessary data.

  The setting display 47 is a display device, and a part of the display screen also serves as a touch panel type input device, and is configured to be able to request display and various commands by touching the buttons on the display screen. Yes.

  The CPU 50, a so-called microprocessor, controls input / output at the port 48 according to predetermined software stored in the memory 49, controls the setting display 47, and responds to a screen display request from the setting display 47. The predetermined data is read from 49 and the requested display screen is displayed on the setting display 47.

  FIG. 2 shows an example of display contents displayed on the display screen of the setting display 47. In the example of FIG. 2, the display screen displays a display content that allows the injection period (injection start time to injection end time) of each sub-nozzle group to be changed for each weft insertion series.

  In the left half of the display content, a bar graph representing the injection period of each sub-nozzle group is shown. In this graph, the abscissa indicates the crank angle (the loom main shaft rotation angle), and the ordinate indicates the weaving width with the yarn feeding side as the reference position. And in the position corresponding to the weaving width on the vertical axis, for each of the 13 sub-nozzle groups in this embodiment, each injection period is indicated by the length of the bar. For each sub-nozzle group, the one closest to the yarn feeding side is displayed as 1G, the adjacent one is displayed in the order of 2G, and the next adjacent one is displayed as 3G. A straight line that obliquely crosses the bar graph schematically shows the weft flight status. In the illustrated example, the weft insertion start timing is 90 ° crank angle, and the target arrival timing is 230 ° crank angle. It has become.

  In the illustrated example, six types of air injection amount reduction patterns are provided, and each pattern can be arbitrarily selected. Each pattern is selected using buttons displayed in a vertical line on the right side of the bar graph. Each button is hatched inside the square so that it can be distinguished from other buttons, and a number corresponding to each pattern is given inside the hatch. In this screen, it is assumed that the pattern corresponding to the button numbered 6 is selected. Next to the buttons numbered from 2 to 6, a “+ pattern” character and a small square with a number smaller by 1 than the number of each button are shown inside. Yes. This visually indicates that, for example, the pattern of number 2 is an air injection amount reduction pattern including the pattern of number 1.

  In the illustrated example, an air injection amount reduction pattern can be set for each weft insertion series. In this case, the weft insertion series is selected by another button displayed in a vertical line at the right end of the screen. The other button is provided with a yarn feeder mark inside the square, and a number corresponding to each weft insertion series is assigned to the inside of the yarn feeder mark. On this screen, there are buttons with yarn feeder marks numbered 1 to 8, among which buttons with yarn mark numbers 1 to 6 can be selected. The selectable button displays lightness brightly, and when selected, the lightness is darkened. In this screen, the weft insertion sequence corresponding to the button numbered 1 is selected. On the other hand, the buttons marked with the yarn feeder marks of Nos. 7 and 8 are lightly displayed to indicate that they cannot be selected.

  In the present embodiment, the initial setting value of the injection period of each sub-nozzle group is automatically obtained based on the weaving conditions (for example, the loom speed, weaving width, weft type, etc.) preset in the main controller 42a. It is assumed that each of the patterns shown in FIG. 2 can be corrected with an independent (uncombinable) air injection amount reduction pattern with respect to those initial set values.

  FIG. 3 explains the initial setting value of the injection period and the air injection amount reduction pattern of each sub-nozzle group shown in FIG. 2 using bar graph-like figures. Note that FIG. 3 is shown in FIG. 2 according to the crank angle on the horizontal axis in order to facilitate understanding of the relationship between the initial setting value of the injection period of each sub-nozzle group and the air injection amount reduction pattern. A horizontal bar corresponding to the injection period of the sub-nozzle group is drawn with its right end (injection end time) aligned.

  First, the initial setting value of the injection period of the sub nozzle group will be described in detail. In the illustrated example, the rectangular horizontal bars indicating the initial set values of the injection periods of the respective sub-nozzle groups are shown in a vertical line on the left side as described above. The horizontal bars of each sub-nozzle group are displayed so as to be stacked in order from the yarn feeding side to the counter yarn feeding side with the right ends aligned in a vertical line. At the left end and the right end of these stacked horizontal bars, the initial setting values of the injection start timing and the injection end timing in the injection period of each sub-nozzle group are shown as crank angles. The crank angles of the injection start timing and the injection end timing are gradually increased in order from the yarn supply side to the counter yarn supply side. The injection period determined from the injection start timing and the injection end timing is the longest on the counter-feeding side, the shortest on the feeding side, and the others other than itself. Is the same or longer than the one on the yarn feeding side. The area of the horizontal bar corresponds to the air injection amount.

  The injection period is not set for each sub-nozzle group, but is set for each sub-nozzle group group composed of two or more sub-nozzle groups adjacent in the order of arrangement. The “downstream sub-nozzle group group” in the present invention is a group composed of two or more sub-nozzle groups including the sub-nozzle group closest to the yarn feeding side. The “upstream sub-nozzle group group” in the present invention is a group composed of two or more sub-nozzle groups including the sub-nozzle group on the most yarn feeding side. The “middle-stream side sub-nozzle group group” in the present invention is one or more groups including sub-nozzle groups excluding the sub-nozzle groups included in each of the downstream-side and upstream-side sub-nozzle group groups.

  In addition, in the example shown in the drawing, the three sub nozzle groups 13G to 11G form the downstream sub nozzle group group GU1 in order from the sub nozzle group 13G closest to the yarn feeding side toward the yarn feeding side, and the most yarn feeding side. The four sub-nozzle groups 1G to 4G are arranged in order from the sub-nozzle group 1G toward the non-feeding side to constitute a sub-nozzle group group GU3 on the upstream side. Further, the remaining sub-nozzle groups 5G to 10G excluding the upstream and downstream sub-nozzle group groups constitute one midstream-side sub-nozzle group group GU2. In the example shown in the drawing, an air injection amount reduction pattern is determined for all these three sub nozzle group groups GU1 to GU3.

  Next, the air injection amount reduction pattern will be described in detail. The air injection amount reduction pattern includes a mode of reducing individual injection periods for all target sub-nozzle group groups. In this embodiment, all three sub nozzle group groups are targets. The reduction mode of the individual injection period is a unit in which a predetermined period is set as one unit, and the reduction mode (reduction amount) of the injection period is individually determined for each target sub-nozzle group group according to the number of units. is there. The air injection amount reduction pattern is created in advance and stored in the memory 49 of the setting display device 46 shown in FIG. In the example of FIG. 3, there are six types of air injection amount reduction patterns having different contents, which are shown as patterns 1 to 6. Further, in this figure, a horizontal bar having the same shape as the initial setting value of the injection period of each sub nozzle group is shown for each pattern so that the air injection reduction amount with respect to the initial setting value of the injection period of each sub nozzle group can be understood. A vertical bar representing a mode of reducing the injection period is hatched at the right end of the horizontal bar. The number of vertical bars aligned horizontally corresponds to the previous unit number. In this embodiment, a crank angle of 4 ° is set as one unit. That is, when the injection period is reduced by one unit, the injection end timing in the injection period of the target sub-nozzle group group is advanced (decreased) by 4 ° in crank angle from the initial set value.

上記表１に記載されている単独の数字は、削減量を表す単位の数であり、本発明の「サブノズルグループ群毎に個別に定めた噴射期間の削減態様」に相当する。そして、この表１の場合、各パターンは、上流側、中流側、下流側といったサブノズルグループ群毎に見れば他のパターンと同じ内容のこともあるが、全体として見れば他のパターンとは異なる内容となっている。 The different contents of each air injection amount reduction pattern shown in FIG. 3 are shown as patterns 1 to 6 in Table 1 below.

The single number described in Table 1 above is the number of units representing the reduction amount, and corresponds to the “injection period reduction mode individually determined for each sub-nozzle group group” of the present invention. In the case of Table 1, each pattern may have the same contents as other patterns when viewed for each sub-nozzle group group such as upstream side, middle stream side, and downstream side, but different from other patterns as a whole. It is a content.

  The patterns 1 to 4 belong to the “first reduction pattern” in the present invention. The first reduction pattern is a pattern in which at least the injection period of the upstream sub-nozzle group group is reduced, and the reduction amount of the injection period in the midstream sub-nozzle group group is the same as the reduction amount of the injection period in the upstream sub-nozzle group group It is. In addition, the patterns 1 to 4 are referred to in the present invention as "the first reduction pattern is a plurality of reductions in which the reduction amount of the injection period in the upstream and middle stream sub-nozzle group groups is the same and the overall reduction amount is different. Including the pattern. "

  On the other hand, the patterns 5 and 6 belong to the “second reduction pattern” in the present invention. The second reduction pattern is a pattern in which the amount of reduction in the injection period in the substream nozzle group on the middle stream side is larger than the amount of reduction in the injection period in the other sub nozzle groups. In addition, the patterns 5 and 6 are “the second reduction pattern includes a plurality of reduction patterns having different reduction amounts of the injection period in the sub-nozzle group group on the middle stream side” according to the present invention.

  In the multi-color weft insertion loom described above, as a default setting, the weaving conditions including the weaving width, the number of rotations of the loom, the type of weft used for weft insertion, and the weft insertion pattern indicating the selection order of the weft are set and displayed. This is set using the setting display 47 in 46. These weaving conditions are stored in a memory (not shown) in the main controller 42a of the loom controller 42.

  Further, based on the conditions (for example, weaving width, rotation speed, weft type, etc.) related to the sub-nozzle injection period among these weaving conditions, the CPU 50 in the setting display device 46 uses a predetermined program to set each sub-nozzle group group. The initial set value of the injection period is obtained, and the obtained initial set value is stored in the memory in the main controller 42a.

The injection period for each sub-nozzle group group is set according to the following procedure.
(1) First, the worker displays the screen shown in FIG. 2 on the setting display. In the graph shown in the left half of FIG. 2, the initial setting value is initially displayed as it is as shown in FIG.

(2) Then, when the operator selects one of the patterns, the injection end timing in the injection period of each sub-nozzle group group is corrected. Each pattern can be arbitrarily selected and is arbitrarily selected by an operator. For example, it is empirically known that the desired weft insertion can be achieved even if the reduction amount of the sub-nozzle group on the middle stream side is increased (the injection period is shortened) for the wefts to be inserted in the weft insertion sequence to be set May select pattern 5 or pattern 6 from the beginning. If it is unclear how much reduction can be achieved, pattern 1 or pattern 2 having a small reduction amount may be selected.

(3) Such correction work (correction work of the injection end timing in the injection period of the initial set value) is performed for each weft insertion series. When all the weft insertion series are corrected, the corrected setting value is transferred to the weft insertion control unit 44 and stored in a memory (not shown) in the weft insertion control unit 44.

  As a result, the weft insertion control unit 44, at the time of weft insertion, based on the weft selection signal S1 from the weft selection signal generation unit 45 and the injection period of each sub-nozzle group set for the selected weft insertion series. Controls the opening / closing of the electromagnetic on / off valves 36 for the sub nozzles.

(4) After the above setting, the operator confirms whether or not the selected air injection amount reduction pattern is appropriate by trial weaving. For example, if weft insertion according to the above setting results in a weft thread that has been inserted in a weft insertion series arriving later than the target allowable arrival timing range, or if the weft thread is loose It is conceivable that it is determined that the reduction amount is too large, and the injection period is reset by changing the correction amount to a pattern that is one step smaller.

  In addition, if the weft reaches the target arrival timing tolerance and the injection period is set by correction with a pattern with a small reduction amount, whether the air injection amount can be further reduced. In order to confirm, it is also conceivable to change the correction amount to a correction by a pattern that is one step larger and reset the injection period.

(5) As a result of repeating the above settings → trial weaving → correction change work, the air injection amount reduction is set to an appropriate amount with respect to the initial setting value of the injection period of the sub nozzle group in each weft insertion series can do.

  The air injection amount reduction pattern stored in advance is not limited to the above-described embodiment, and modifications such as the examples (modifications) shown in FIGS. 4 and 5 are possible. The outline is described first. In the above-described embodiment, the initial setting value of the injection period is corrected by selecting any one of a plurality of independent (uncombinable) patterns. However, the modified examples of FIGS. A plurality of injection amount reduction patterns are stored in advance, and these are combined to set a reduction amount for the air injection amount. Each example will be described in detail below in the order of the figure numbers.

上記表２に記載されている単独の数字は、削減量を表す単位の数である。また、上記のパターン１、２は、「第１の削減パターン」に属し、パターン３は、「第２の削減パターン」に属する。 In the modification of FIG. 4, as shown in FIG. 4A, there are three types of air injection patterns having different contents, which are displayed as patterns 1 to 3. Table 2 below shows the contents of each air injection amount reduction pattern. In this example as well, all three sub-nozzle group groups are targets (targets for which an injection period reduction mode is determined).

The single number described in Table 2 is the number of units representing the reduction amount. The patterns 1 and 2 belong to the “first reduction pattern”, and the pattern 3 belongs to the “second reduction pattern”.

In FIG. 4B, four types of combination patterns configured by combining the above patterns 1 to 3 are shown as an example.
The combination pattern <1> is a combination of the patterns 1 and 2 one by one.
The combination pattern <2> is a combination of one pattern 1 and two patterns 2.
The combination pattern <3> is a combination of one pattern 1, three patterns 2, and one pattern 3.
The combination pattern <4> is a combination of one pattern 1, three patterns 2, and two patterns 3.

  In the above embodiment, the amount of reduction relative to the air injection amount of the sub-nozzle group group on the upstream side is up to 4 units. However, in the case of this modified example, it may be 5 units or more depending on the combination. Is also possible.

上記表３に記載されている単独の数字は、削減量を表す単位の数である。また、上記のパターン３は、「第１の削減パターン」に属し、パターン２は、「第２の削減パターン」に属する。 In the modified example of FIG. 5, as shown in FIG. 5A, there are three types of air injection patterns having different contents, which are displayed as patterns 1 to 3. Table 3 below shows the contents of each air injection amount reduction pattern. In this example as well, all three sub-nozzle group groups are targets (targets for which an injection period reduction mode is determined).

The single number described in Table 3 is the number of units representing the reduction amount. The pattern 3 belongs to the “first reduction pattern”, and the pattern 2 belongs to the “second reduction pattern”.

In FIG. 5B, four types of combination patterns configured by combining the above patterns 1 to 3 are shown as an example.
The combination pattern <1> is a combination of two patterns 2.
The combination pattern <2> is a combination of four patterns 2 and one pattern 3.
The combination pattern <3> is a combination of four patterns 2 and three patterns 3.
The combination pattern <4> is a combination of one pattern 1, four patterns 2, and three patterns 3.

  With this modification, a more detailed reduction amount can be set. For example, it is possible to greatly reduce the air injection amount of the sub-nozzle group group on the midstream side, and then reduce the air injection amount of the sub-nozzle group group on the upstream side, and the air injection amount of the sub-nozzle group group on the downstream side cannot be reduced much. If it is known, it is possible to determine the reduction amount by a method of reducing in stages in the order of the middle stream side (pattern 2), upstream side (pattern 3), and downstream side (pattern 1). .

The present invention is not limited to the above embodiment and two modifications. For example, as an object of the air injection amount reduction pattern (an object for which a reduction mode of the injection period is determined), the above-described embodiments and the like all include downstream sub-nozzle group groups. The sub-nozzle group group is not essential and may include only the other sub-nozzle group group and / or the upstream-side sub-nozzle group group.
The reason for this is that, as described above in the section of the problem to be solved by the invention, the sub-nozzle group on the counterfeed side is not only transporting the weft yarn during weft insertion (during weft flight) but also the tip of the weft yarn is warped. Since it also plays a role in preventing weft loosening (stretching function) after reaching the yarn supply side, it is often not preferable to advance the injection end timing. Therefore, the present invention may exclude the sub-nozzle group group on the downstream side including the sub-nozzle group on the most opposite yarn feeding side as the target of the air injection amount reduction pattern.

  In the present invention, the number of sub-nozzle groups included in the sub-nozzle group groups on the downstream side and the upstream side is not limited to those in the above-described embodiment and the like. And at least one sub nozzle group adjacent to the sub nozzle group.

  Further, the present invention is not limited to the sub nozzle group excluding the sub nozzle group included in the downstream side and upstream side sub nozzle group groups, which constitutes one middle stream side sub nozzle group group as in the above-described embodiment, It may be divided into two or more in the order of arrangement, and two or more middle-stream side sub nozzle group groups may be configured. In this case, two or more middle-stream-side sub-nozzle group groups may have different ejection period reduction modes.

  Further, according to the present invention, the setting of one unit of reduction amount in the air injection amount reduction pattern is not limited to using the crank angle as in the above-described embodiment, and time or the like may be used in addition thereto.

DESCRIPTION OF SYMBOLS 11 Weft insertion apparatus 12 Yarn feeder stand 13 Yarn supply body 14 Weft yarn 15 Length measuring storage device 16 Yarn winding arm 17 Drum 18 Locking pin 19 Actuator 20 Main nozzle 21 Sub nozzle 22 Warp 23 Open 24 Cloth 25 Weaving cloth 26 27 Feeder cutter 30 Feeler head 31 Feeler head 32 Pressure air source 33 Pressure regulator 34 Electromagnetic on-off valve 35 Pressure regulator 36 Electromagnetic on-off valve 40 Main shaft 41 Encoder 42 Weaving machine control device 42a Main control device 43 Weft insertion control device 44 Weft insertion Control unit 45 Weft selection signal generator 46 Setting display device 47 Setting display 48 port 49 memory 50 CPU
C1 color C2 color C3 color S1 weft selection signal θ angle

Claims (4)

A plurality of sub-nozzles arranged along the weft insertion path are divided into a plurality of sub-nozzles connected to a common electromagnetic on-off valve, and a plurality of sub-nozzle groups are formed. In the air jet loom in which the wefts injected from the main nozzle are assisted by the air injection and the weft insertion is performed by each sub nozzle group performing air injection in the injection period, the sub nozzle injection in the air injection loom A period setting method,
The plurality of sub-nozzle groups includes the most counter-feeding sub-nozzle group and includes a downstream sub-nozzle group including two or more sub-nozzle groups, and includes the most sub-feeding-side sub-nozzle group and upstream including two or more sub-nozzle groups. And divided into one or more middle-stream side sub-nozzle group groups consisting of sub-nozzle groups excluding the sub-nozzle groups included in each of the downstream-side and upstream-side sub-nozzle group groups,
By individually determining a reduction mode of the injection period for each of the target sub-nozzle group groups with respect to at least the middle-stream side sub-nozzle group group and the upstream-side sub-nozzle group group as a target. The air injection amount reduction patterns including the individual injection period reduction modes for all the target sub-nozzle group groups are determined with different contents, and the determined plural air injection amount reduction patterns are stored in advance and arbitrarily Can be selected,
When setting the injection period of each sub-nozzle, the operator arbitrarily selects the plurality of air injection amount reduction patterns, and the set value of the injection period set based on the selected air injection amount reduction pattern A method for setting a sub-nozzle injection period in an air-jet loom, characterized in that the injection end timing is corrected.   The plurality of air injection amount reduction patterns reduce at least the injection period of the upstream sub-nozzle group group, and the reduction amount of the injection period in the midstream sub-nozzle group group corresponds to the reduction amount of the injection period in the upstream sub-nozzle group group. A first reduction pattern that is the same or smaller, and a second reduction pattern in which the amount of reduction in the injection period in the sub-nozzle group group on the middle stream side is larger than the amount of reduction in the injection period in other sub-nozzle group groups, The sub-nozzle injection period setting method for an air-jet loom according to claim 1. The first reduction pattern includes a plurality of reduction patterns in which the reduction amount of the injection period in the upstream sub-nozzle group group is the same as the reduction amount of the injection period in the sub-nozzle group group on the midstream side and the overall reduction amount is different. Including
3. The method for setting a sub-nozzle injection period in an air-jet loom according to claim 2, wherein the second reduction pattern includes a plurality of reduction patterns having different amounts of reduction in the injection period in the sub-nozzle group group on the middle stream side.   The air jet loom is a loom having a multi-color weft insertion device composed of a plurality of weft insertion series, wherein the injection end timing is corrected for each weft insertion series. 4. A sub nozzle injection period setting method in the air jet loom according to claim 3.

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