JP2013002007A - Method of adjusting jet position of auxiliary nozzle in air jet type loom and device for adjusting jet position of auxiliary nozzle in air jet type loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of adjusting a jet position of an auxiliary nozzle, which is at least one of a sub-nozzle or a stretch nozzle so as to allow the optimal weft insertion according to the weaving state in the weaving process.SOLUTION: A method of adjusting a jet position of an auxiliary nozzle, which is an adjustment target, in an air-jet type loom comprises: setting at least one auxiliary nozzle as the adjustment target; and adjusting a jet position of the auxiliary nozzle of the adjustment target by means of an actuator according to the change of the weaving state in the weaving process. The method is especially adapted for an air-jet type loom comprising an auxiliary nozzle, which comprises a number of sub-nozzles that are disposed on a weft insertion path, and also adapted for a loom which implements weaving while changing the weaving state in the weaving process.

Description

  The present invention has an auxiliary nozzle including a plurality of sub-nozzles arranged along a weft insertion path, and an injection position of the auxiliary nozzle in an air jet loom in which weaving is performed with a change in the weaving state during weaving The present invention relates to a method and an apparatus for adjusting.

The “auxiliary nozzle” referred to in the present application includes at least a sub nozzle, and specifically includes a case where the sub nozzle is composed of only a sub nozzle and a case where the sub nozzle is composed of a stretch nozzle.
Further, in the present invention, the target stretch nozzle has the same form as the sub nozzle, and is the most anti-feeding side of auxiliary nozzles arranged in parallel on the loom and on the front of the weft insertion path. At a position away from the weft insertion path, the air injection port (more specifically, the traveling direction of the compressed air injected from the air injection port toward the non-feeding side) forms an acute angle on the anti-feeding side with respect to the weft. It shall be arranged as follows.

The “injection position” in the present application is at least one of the injection height position and the injection angle position.
The “injection height position” is the position of the air injection port in the axial direction of the sub nozzle and the stretch nozzle, and is a position that forms a certain height position from the reference point. As shown in FIG. 6, the reference point is a position when the air injection port 22a is the lowest in the movable range in the axial range of the auxiliary nozzle.
Furthermore, the “injection angle position” is an angular position of the air injection port around the axis of the auxiliary nozzle with respect to the axis, and more specifically, as shown in FIG. If it demonstrates using, when the sub nozzle 22 is seen from upper direction, it is the angle which the straight line which connects the said axis line and the air injection port (center of air injection port) 22a makes with respect to the weft insertion direction.

  In the air jet loom, in addition to the main nozzle that injects the weft, a large number of sub nozzles are arranged along the weft insertion path. When the weft insertion is performed, the compressed air is injected from the main nozzle so that the weft is injected from the main nozzle and flies toward the counter-feeding side, and in a preset period. Pressure air is ejected from the sub nozzle, and the weft flying is assisted by the pressure air ejected from the sub nozzle.

  In such an air jet loom, it is known that the injection position of the sub nozzle affects the flying of the weft. For this reason, it has been conventionally performed to adjust the injection position of the sub nozzle according to the weaving conditions such as the type of weft used for weaving. The “weaving conditions” referred to in the present application refers to the type of weft, the woven structure, the rotational speed of the loom, and the like.

  For example, Patent Document 1 discloses a conventional technique for adjusting the injection position of such a sub-nozzle, in which a motor capable of adjusting the height of the sub-nozzle is connected to the sub-nozzle referred to in the present application. This adjusts the height position of the air injection port of the sub nozzle at the time of weft insertion by a motor during the weaving preparation stage (weaving machine stop state).

  Further, as another conventional technique for adjusting the injection position of such a sub nozzle, a technique using a rack and pinion mechanism is disclosed in Patent Document 2. More specifically, a single rack extending along the weft insertion path is provided, and a sub-nozzle referred to in the present application is meshed and connected to the rack, and a rotation mechanism including a pinion is provided on the yarn supply side of the rack. Have been disclosed. This adjusts the injection angle position of the air injection port of the sub-nozzle at the time of weft insertion by a rotating mechanism during the weaving preparation stage.

JP-A-2-26958 Japanese Utility Model Publication No. 3-15576

  Incidentally, some air jet looms perform weaving by changing the weaving conditions during operation (weaving). In addition, with the change in weaving conditions, the weft flying state may change. Therefore, it is desirable to change the injection position of the sub nozzle as the weaving conditions are changed. Similarly, it is desirable to change not only the weaving conditions but also the sub-nozzle injection position in accordance with the change in the weaving state. The “weaving state” herein refers to a weft flying state such as a weaving condition or an arrival timing at which the leading end of the flying weft reaches a predetermined position in the weft insertion path.

  However, in the prior art described in Patent Documents 1 and 2, the injection position of the sub nozzle at the time of weft insertion is adjusted and set before the start of weaving in the weaving preparation stage, and at least weaving It is constant when the weft is inserted. Therefore, in the prior art described in Patent Documents 1 and 2, the injection position of the sub nozzle cannot be changed in accordance with the change of the weaving condition during weaving, and the optimum weft insertion according to the weaving condition is realized. I can't.

  In addition, the said patent document 1 is changing changing the injection height position of a sub nozzle during weaving. However, this is to change the injection height position of the sub nozzle between weft insertion and non-weft insertion during weaving, and as a result, the injection height position of the sub nozzle during weft insertion during weaving is It is constant.

  In addition, Patent Documents 1 and 2 describe only the adjustment for the sub-nozzle referred to in the present application, and do not describe the adjustment for the stretch nozzle disposed on the side opposite to the yarn feeding side from the sub-nozzle. However, if the stretch nozzle has the same structure as the sub nozzle, it can be considered that the same adjustment as that of the sub nozzle is possible.

  The present invention has been created in consideration of the above circumstances, and its problem is to adjust the injection position of the auxiliary nozzle so that the optimum weft insertion according to the weaving state during weaving is possible. And providing an apparatus.

  The present invention is premised on an air jet loom having an auxiliary nozzle including a plurality of sub-nozzles disposed along a weft insertion path, wherein weaving is performed with a change in the weaving state during weaving.

  The method for adjusting the injection position of the auxiliary nozzle in the air jet loom according to the present invention sets at least one of the auxiliary nozzles as an adjustment target, and adjusts the injection position of the auxiliary nozzle to be adjusted by an actuator. It is possible to adjust the injection position of the auxiliary nozzle to be adjusted in accordance with the change of the weaving state during weaving.

  Moreover, the auxiliary nozzle injection position adjusting device according to the present invention corresponding to such an adjustment method is such that at least one of the auxiliary nozzles to be adjusted is an injection position with respect to a support that supports the auxiliary nozzle. And a drive device that adjusts the injection position of the auxiliary nozzle to be adjusted. The drive device includes an actuator connected to the auxiliary nozzle to be adjusted, and a weaving state during weaving. And a control device that controls the driving of the actuator so as to adjust the ejection position of the auxiliary nozzle to be adjusted.

  In addition, as the adjustment method and the adjustment device, the auxiliary nozzle may include a stretch nozzle arranged in parallel to the sub-feeding side of the sub nozzle in addition to the sub nozzle. That is, when adjusting the injection position of the auxiliary nozzle, when the auxiliary nozzle is composed only of sub nozzles, at least one sub nozzle is formed, and when the auxiliary nozzle is composed of sub nozzles and a stretch nozzle In this case, at least one of the sub nozzle and the stretch nozzle is to be adjusted.

Moreover, the case where the injection position of an auxiliary nozzle is adjusted as the said adjustment method and adjustment apparatus are preset as a database can be considered.
Therefore, as an adjustment method, when the air jet loom is a loom set so as to automatically change the weaving conditions during weaving according to a plurality of preset weaving conditions, The position is adjusted, and a database including the injection position corresponding to each of the plurality of set weaving conditions is set in advance, and when the weaving conditions are changed, according to the changed weaving conditions The injection position may be selected from the database and the actuator may be driven based on the selected injection position.
Similarly, as the adjusting device, the control device corresponds to a setter for setting a database including the injection position corresponding to each of the set plural weaving conditions, and a weaving condition set from the database. And a drive controller that controls driving of an actuator connected to the auxiliary nozzle to be adjusted based on the selected injection position.

In particular, when the air jet loom is a multi-color weft insertion loom and the weaving condition is a weft selection pattern set for selectively wefting two or more wefts having different yarn types. Then, as the adjustment method at that time, the injection position corresponding to each weft to be inserted into the database is set, and the weft after switching is corresponding to the switching of the weft during weaving. The actuator may be driven based on the ejection position.
Similarly, the adjusting device is used for a loom having a multi-color weft insertion device including a weft selection signal generating unit that outputs a weft selection signal according to the selection pattern of the weft, and the setting device includes a weft A database including the injection position corresponding to each weft to be inserted is set, and the drive controller responds to the selected weft with the input of the weft selection signal from the weft selection signal generator. Further, the setting value of the ejection position of the auxiliary nozzle may be read from the database.

  Further, in the adjustment method and the adjustment device as described above, when the adjustment is properly performed up to the set injection position by a sensor, and the injection position is not a set value, Re-adjustment may be performed.

Specifically, as such an adjustment method, the injection position after the change of the injection position is detected, the detected value is compared with the injection position selected according to the weaving conditions, and a deviation is detected between them. If this occurs, the actuator may be driven so as to eliminate the deviation.
Similarly, as such an adjustment device, an injection position detection sensor for detecting the injection position is provided, and the control device uses a detection value of the injection position detection sensor after changing the injection position and the weaving condition. A discriminator for comparing the injection position selected according to the discriminator, and the drive controller generates a deviation between the injection position selected as a comparison result by the discriminator and a detection value of the sensor. The actuator may be driven so as to eliminate the deviation.

  Further, the adjustment method and the adjustment device according to the present invention are not limited to changing the injection position according to the change of the weaving condition as described above, but according to the flying state of the weft yarn detected by the sensor. This includes the case of adjusting the position.

In this case, as an adjustment method, the air jet loom includes a passage detection sensor for detecting the passage of the tip of the weft inserted to detect the flying state of the weft, and the position of the passage detection sensor is set to the tip of the weft. A reference value related to the rotation angle of the loom main shaft at the time of passing is preset in the setting device, the reference value is compared with the rotation angle when the weft is actually detected, and there is a deviation between the two. If it occurs, the actuator may be driven in a direction to eliminate the deviation.
Similarly, the adjustment device in that case includes the passage detection sensor, and the control device includes the setting device, the reference value, and the rotation angle when the weft yarn is detected by the passage detection sensor at the time of weft insertion. And a drive controller that controls the driving of the actuator in a direction to eliminate the deviation when a deviation occurs as a comparison result by the comparator.

  Here, “to drive the actuator in a direction to eliminate the deviation” means that the time point when the tip of the weft passes the position of the passage detection sensor to the reference value in order to reduce or eliminate the deviation. This means that the actuator is driven to adjust the injection position of the auxiliary nozzle so that the approaching weft yarn is in a flying state. However, the drive amount of the actuator in that case is not limited to the one that corresponds to the deviation and that the deviation is eliminated by a single drive, but is driven by a predetermined amount that is preset according to the direction of the deviation. It is good to do.

  According to the present invention, with the change of the weaving state during weaving, the optimum weft insertion can be performed by adjusting the injection position of the auxiliary nozzle to be adjusted, and the weaving property and the quality of the woven fabric are improved.

  In addition, a database relating to the injection position is provided, and the injection position corresponding to the weaving condition is selected from the database, and the actuator is driven based on the selected injection position. In an air-jet loom in which weaving conditions (for example, weft insertion patterns for selectively wefting two or more wefts of different yarn types) are changed, the weaving conditions after the change according to the change in the weaving conditions The injection position corresponding to is selected from the database, and the actuator is driven based on the selected injection position to automatically adjust the injection position, so that the injection position is not stopped without stopping the loom. Can be optimized according to each weaving condition during weaving, and optimum weft insertion is possible in weaving under each weaving condition That.

  In addition, an injection position detection sensor that detects the injection position of the auxiliary nozzle is provided, and the injection position that is adjusted in accordance with the change of the weaving condition is detected by the injection position detection sensor. By comparing the injection position (set value) set according to the weaving conditions and driving the actuator so as to eliminate any deviation between the two, it is possible to ensure the injection position. In addition, it can be optimized according to the weaving conditions.

  In addition, a passage detection sensor for detecting the passage of the tip of the weft is provided, and the tip of the weft passes the detection value of the passage detection sensor (the rotation angle of the loom main shaft when the weft is actually detected) and the position of the sensor. Compared to the reference value for the rotation angle of the loom main shaft at the time, and if there is a deviation between them, the actuator is driven in a direction to eliminate the deviation, so that the weft flying state is met Thus, the jetting position is changed, and as a result, the flying state of the weft yarn that has changed due to the progress of weaving or disturbance can be corrected, and proper weft insertion can be maintained.

It is explanatory drawing which shows the principal part in the weft insertion apparatus of an air injection type loom, and the adjustment apparatus of the injection position of an auxiliary nozzle. It is explanatory drawing which shows the drive transmission mechanism etc. for sub nozzles. (A) is a partially cutaway side view of FIG. 2, (b) is the sectional view on the AA line of FIG. It is explanatory drawing which shows the modification of the Example of FIG. It is explanatory drawing which shows another Example in the adjustment apparatus of the injection position of an auxiliary nozzle. It is explanatory drawing of the injection height position of an auxiliary nozzle. It is explanatory drawing of the injection angle position of an auxiliary nozzle.

  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. FIG. 1 also shows a two-color weft insertion device 11 for weft-inserting two types of weft yarns (the weft yarn a wound around the yarn feeder A and the weft yarn b wound around the yarn feeder B). The two-color weft inserting device 11 corresponds to the multi-color weft inserting device of the present invention.

  In the weft insertion device 11 of FIG. 1, the weft yarn a and the weft yarn b are drawn from the yarn feeders A or B supported by the respective yarn feeder stands 12, for example, the bobbin of the drum-type length measuring storage device 13. The yarn is wound around the outer peripheral surface of the drum 15 by the rotational movement of the yarn winding arm 14 while being guided to the inside of the winding arm 14 and being locked by the locking pin 16 on the outer peripheral surface of the drum 15 in a stationary state. As a result, the weft yarn a and the weft yarn b having a length required for one weft insertion are wound around the outer peripheral surface of the drum 15 and stored until the weft insertion.

  The length measuring storage device 13 (rotational movement of the yarn winding arm 14 and forward / backward movement of the locking pin 16) and the main nozzle 21 for weft insertion are made into a weft insertion pattern by the weft insertion control unit 44 of the weft insertion control device 43. It operates based on a selected weft selection pattern.

  When the locking pin 16 corresponding to the weft thread (weft thread b in the illustrated example) selected by the weft insertion control unit 44 is driven by the operating unit 17 at the weft insertion start timing and is retracted from the outer peripheral surface of the drum 15, the drum The weft b having a length necessary for one weft insertion wound around the outer periphery of the roller 15 is in a state where it can be unwound on the drum 15. The weft b passed from the drum 15 to the main nozzle 21 for weft insertion is unwound from the drum 15 and inserted by the main nozzle 21 performing an injection operation.

  The main nozzle 21 corresponding to the selected weft b starts injection of pressurized air toward the opening of the warp at the set weft insertion start timing, and continues the injection over the set injection period, A weft b having a predetermined length is injected and inserted into the opening. By this weft insertion operation, the weft b travels along the weft insertion path in the opening. 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 21 via an electromagnetic on-off valve 34. The electromagnetic on-off valve 34 operates based on the weft selection pattern 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 two colors, but in the case of weft insertion of three colors or more, the yarn feeder, the length measuring storage device 13, the main nozzle 21 and the like (described later) The auxiliary nozzles (except for the sub nozzle 22 and the stretch nozzle 23 in this embodiment, excluding the weft feeler 31) are installed according to the number of multicolors (the number of wefts) and are defined in the weft insertion pattern. The weft insertion operation is performed according to the selected pattern of the weft. In the case of one color weft insertion, only one yarn feeder, length measuring storage device 13, main nozzle 21 and the like are installed.

  In the process in which the weft b injected from the main nozzle 21 flies along the weft insertion path in the opening, the multiple sub-nozzles 22 included in the auxiliary nozzle pass the compressed air through the weft insertion path. It sprays in a running direction toward the running direction, and assists the flying weft b in the weft insertion direction. More specifically, the plurality of sub-nozzles 22 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 22 connected to the common electromagnetic switching valve 36. In the figure, the sub-nozzle groups are displayed as G1, G2, G3,.

  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 22 of each sub nozzle group through 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, supplies pressure air to the sub nozzles 22 of the corresponding sub nozzle group for the set injection period, and pressure air from the sub nozzles 22 is supplied. The flying weft b is assisted in the weft insertion direction.

  When the tip of the assisted weft b reaches the counter feed yarn side rather than the sub-nozzle 22 positioned closest to the counter feed yarn side, the weft b is tensioned by the injection of pressure air from the stretch nozzle 23 included in the auxiliary nozzle. Is granted. For this reason, the stretch nozzles 23 are arranged at a distance from the sub-feeding side rather than the sub-nozzles (most sub-feeding side sub-nozzles) 22 arranged along the weft insertion path. In addition, an electromagnetic on-off valve 37 is connected to the stretch nozzle 23.

  When the weft b is normally inserted by the injection operation of the main nozzle 21, the sub nozzle 22 of each sub nozzle group, and the stretch nozzle 23, the weft b is woven before weaving the woven fabric by a not-illustrated scissors movement. After being beaten and woven into the woven fabric, it is cut by a yarn feed cutter (not shown) on the weft insertion side and separated from the weft b inside the main nozzle 21. Whether or not the weft insertion has been normally performed is determined by a main controller (not shown) of the loom based on a signal from the weft feeler 31 that detects the arrival of the weft b. In the illustrated example, the weft feeler 31 is disposed outside a warp row (not shown) on the counterfeed side (on the counterfeed side from the stretch nozzle 23 along the weft insertion path).

  In order to detect the rotation angle of the main shaft 41, an encoder 42 is connected to the main shaft 41, and the encoder 42 generates a signal of the rotation angle of the main shaft 41 during weaving, which is not shown in the main controller of the loom, Also output to the weft insertion control unit 44 and the weft selection signal generation unit 45 of the weft insertion control device 43.

  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 from the encoder 42 and follows the weft selection pattern preset for the weft insertion pattern. The weft b) is selected for each weaving cycle, and a weft selection signal S1 corresponding to the selected weft is output to the weft insertion control unit 44 for each weaving cycle. The weft insertion control unit 44 controls the operations of the length measuring storage device 13, the main nozzle 21, the sub nozzle 22, the stretch nozzle 23, and the like corresponding to the selected weft based on the set control value under an appropriate rotation angle. The weft insertion operation of the selected weft is executed.

  The weft insertion control device 43 described above is configured as a combination of blocks according to function. Such a weft insertion control device 43 may be realized by combining devices composed of blocks, or by installing predetermined software in a computer and executing the software, input / output means and storage means of the computer. It is also possible to configure each block in which the arithmetic control means and the software cooperate and to realize it by a combination of these blocks.

  An input / setting display device 46 is communicably connected to the weft insertion control device 43 in order to set the weaving state data and the like for the weft insertion control device 43.

  The input / setting display device 46 is a display device. A part of the display screen also serves as a touch panel type input device, and various data input settings and display requests or various requests can be made by touching the buttons on the display screen. It is configured to enable such commands.

  In the air jet loom as described above, in the present invention, the weft insertion device 11 includes an adjusting device for adjusting the injection position of the auxiliary nozzle in addition to the basic configuration described above. In this embodiment, all the sub-nozzles 22 (more specifically, all the sub-nozzles 22 included in all the sub-nozzle groups) and the stretch nozzles 23 as the auxiliary nozzles are adjusted, and the injection height is set as the adjusted injection position. Both position and injection angle position shall be adjusted. And the said adjustment apparatus is comprised as a drive device which adjusts the injection position of such an auxiliary nozzle.

  In this embodiment, the driving device is composed of an actuator, a drive transmission mechanism 71, and an auxiliary nozzle control device 61a as a control device. As the actuator, a height position adjusting drive motor M1 for adjusting the injection height position and an angle position adjusting drive motor M2 for adjusting the injection angle position, that is, two drive motors M1 and M2 are used. Shall. Each drive motor M1, M2 is provided for each of the sub nozzle group and the stretch nozzle 23, and is connected to each auxiliary nozzle via each drive transmission mechanism 71. That is, in the present embodiment, the ejection position of the sub nozzle 22 is adjusted in units of sub nozzle groups. A front view showing such a connection structure of the sub-nozzles 22 included in each sub-nozzle group and the drive motors M1 and M2 via the drive transmission mechanism 71 is shown in FIG. 2, and a side view of FIG. 2 and a cross-sectional view taken along line AA of FIG. 2 are shown in FIGS. 3 (a) and 3 (b). Since there is only one stretch nozzle 23, it is connected to each drive motor M1, M2 in a one-to-one relationship (not shown).

  The sub-nozzle 22 is a hollow rod extending in a straight line. A pressure air supply port is formed at the base end of the sub-nozzle 22, and an air injection port 22a is formed on the side surface of the tip end of which the tip is closed like a bag. Is formed. The air injection port 22 a penetrates in a direction substantially orthogonal to the axial direction of the sub nozzle 22. Each sub-nozzle 22 is formed thicker in a step shape toward the outside in the radial direction on the base end side than the distal end portion where the air injection port 22a is provided, and is provided for each sub-nozzle 22 in this thick step-shaped portion 22b. It is supported by a dedicated nozzle holder 24 as a support so as to be rotatable and slidable in the height direction. Such a dedicated nozzle holder 24 is fixed to the lead holder 25 at intervals along the weft insertion path, whereby each sub nozzle 22 is arranged along the weft insertion path. Note that the lead holder 25 supports a hook (not shown).

  The drive transmission mechanism 71 includes a portion that functions for height position adjustment and a portion that functions for angle position adjustment. The detailed configuration is as follows.

  In the present embodiment, the part that functions as the height position adjustment in the drive transmission mechanism 71 is mainly the lifting body 72. The elevating body 72 stands in a substantially right angle to the base member 73 and a plate-like base member 73 that extends in the direction in which the sub-nozzles 22 are juxtaposed (hereinafter referred to as “width direction”). A plurality of support columns 74 provided and a guide member 75 supported by the support columns 74 and extending in parallel with the base member 73.

  The support columns 74 are three in the illustrated example, and are disposed so as to support both end portions and the intermediate portion in the width direction of the guide member 75 and in parallel with the axial direction of the sub nozzle 22. Hereinafter, the axial direction of the sub nozzle 22 and the direction parallel to the axial direction are referred to as a “height direction”.

  Each of the guide member 75 and the base member 73 has at least a length dimension corresponding to the existence range of the four sub-nozzles 22 constituting one sub-nozzle group in the width direction. The elevating body 72 is formed by combining and integrating the guide member 75 and the base member 73 so as to sandwich the support columns 74 therebetween.

  Further, among the three pillars 74 that connect the guide member 75 and the base member 73, the middle part pillar 74 has a female screw hole 81 that opens in the end surface on the base member 73 side and extends in the height direction. Is formed. Further, the base member 73 is formed with a hole 82 at a position concentrically communicating with the female screw hole 81 in a state where the base member 73 and the column 74 are combined. Is slightly larger than the inner diameter of the female screw hole 81. A male screw member 83 that is attached to the output shaft of the drive motor M1 for height position adjustment and that passes through the through hole 82 is screwed into the female screw hole 81 of the column 74 in the lifting body 72. With this configuration, the elevating body 72 moves up and down in the height direction according to the rotational drive of the output shaft of the drive motor M1, and is attached to the female screw hole 81 of the column 74 and the output shaft of the drive motor M1. The male screw member 83 constitutes a so-called ball screw mechanism.

  The drive motor M1 is supported by a support member 78 so that the axis of the output shaft is parallel to the height direction. The support member 78 extends in the width direction in front of the lower portion of the lead holder 25, and is fixed to the lead holder 25 via a bracket 79 by screwing or the like. The bracket 79 is formed with a through hole 79a in a portion located below the sub nozzle 22, and a tube 22c connected to the sub nozzle 22 can pass through the through hole 79a.

  Furthermore, a pair of guide rods 77 are erected on the support member 78 so as to extend in the height direction at positions corresponding to the columns 74 at both ends of the elevating body 72. On the other hand, the elevating body 72 is formed with a guide hole 76 that penetrates the base member 73 and extends in the height direction inside the struts 74 at both ends at the positions of the struts 74 at both ends. Then, by inserting and inserting each of the pair of guide bars 77 into each guide hole 76 of the lifting body 72, the lifting body 72 is guided to move up and down in the extending direction of the guide bars 77, that is, in the height direction. The

  A pinion 52 is concentrically fixed to each sub-nozzle 22 on its base end side (more specifically, a portion protruding downward from the nozzle holder 24 in the height direction). Further, the guide member 75 in the elevating body 72 is formed with a guide groove 75 a that opens on the surface facing the sub nozzle 22. And by inserting the outer peripheral part of the pinion 52 with respect to this guide groove 75a, the sub nozzle 22 and the raising / lowering body 72 are connected in the state in which the relative movement to a height direction is impossible. Therefore, the position of the sub nozzle 22 in the height direction is changed (adjusted) as the elevating body 72 moves up and down in the height direction.

  In the present embodiment, the portion that functions for adjusting the angular position in the drive transmission mechanism 71 is constituted by a rack and pinion mechanism including a rack 51 and the pinion 52 described above.

  The rack 51 has a dimension longer than that of the guide member 75 in the width direction. The rack 51 is inserted so as to be movable in the width direction with respect to the guide groove 75a, and the movement is guided by the inner surface of the guide groove 75a. The rack 51 meshes with the pinion 52 in the guide groove 75a. Therefore, according to this configuration, as the rack 51 moves in the width direction, the pinion 52 that meshes with the rack 51 rotates, and accordingly, the sub-nozzle 22 rotates forward and backward around the axis.

  As described above, the rack 51 is longer than the guide member 75 of the elevating body 72 in the width direction. Therefore, when the rack 51 is inserted into the guide groove 75a, the end portion of the rack 51 protrudes from the guide member 75 in the width direction. The rack 51 is engaged with a pinion 53 attached to the output shaft of the drive motor M2 for adjusting the angular position at the protruding portion. With this configuration, the rack 51 moves in the width direction as the output shaft of the drive motor M2 rotates. As a result, as described above, the sub-nozzle 22 rotates with the rotation of the pinion 52, and the ejection angle position of the sub-nozzle 22 is changed (adjusted).

  The drive motor M <b> 2 is supported by the base member 73 of the elevating body 72. More specifically, similarly to the rack 51, the base member 73 has a length in the width direction that is longer than that of the guide member 75, and the lifting body 72 has one end side in the width direction (right side in the drawing). The base member 73 is configured to protrude from the guide member 75. The drive motor M2 is mounted on the upper surface of the protruding portion of the base member 73. Therefore, the position of the drive motor M <b> 2 in the height direction is changed together with the sub nozzle 22 as the lifting body 72 moves up and down in the height direction.

  As shown in FIG. 1, each of the drive motors M1 and M2 is connected to an auxiliary nozzle control device 61a, and is driven to rotate by being supplied with an excitation current from the auxiliary nozzle control device 61a. The auxiliary nozzles including 23 are driven up and down or rotated to adjust their injection positions.

  The auxiliary nozzle control device 61a includes a drive controller 62 including a height position control unit 62a and an angular position control unit 62b, and a setting unit 63. The setting device 63 is communicably connected to the input / setting display device 46. Then, a database relating to the injection positions of the sub-nozzle 22 and the stretch nozzle 23 set by the input operation in the input / setting display device 46 is transferred from the input / setting display device 46 to the setting device 63, and the transferred database Is set. As described above, in this embodiment, since the injection position of the sub nozzle 22 is adjusted in units of sub nozzle groups, the injection position of the sub nozzles 22 in the database is set in units of sub nozzle groups.

In this database, the injection positions of the sub nozzles 22 (each sub nozzle group) and the stretch nozzles 23 to be adjusted are set in a manner corresponding to the weft types (each of the weft a and the weft b).
That is, in this database, for example, when the weft type to be inserted corresponding to each of the weft yarns a and b is the weft yarn a, the injection height position h of each sub nozzle group and the stretch nozzle 23, and the injection The angular position θ is sub nozzle group G1: h = r1, θ = x1 °, sub nozzle group G2: h = r2, θ = x2 °, sub nozzle group G3: h = r3, θ = x3 °,..., Stretch nozzle 23: When h = rn, θ = xn °, and the weft type to be inserted is the weft b, sub nozzle group G1: h = s1, θ = y1 °, sub nozzle group G2: h = s2, θ = y2 °, Sub nozzle group G3: h = s3, θ = y3 °,..., Stretch nozzle 23: h = sn, θ = yn °.

  The drive controller 62 is communicably connected to the setting device 63 and is communicably connected to the weft selection signal generator 45 in the weft insertion control device 43. Corresponding drive motors M1 and M2 are connected to the height position control unit 62a and the angular position control unit 62b included in the drive controller 62. Then, the weft selection signal S1 output from the weft selection signal generator 45 for each weaving cycle in order to switch the weft inserted during weaving is also input to the drive controller 62. Thereby, the height position control unit 62a and the angular position control unit 62b of the drive controller 62 set the set value of the injection position corresponding to the weft selection signal S1 from the weft selection signal generation unit 45 in the setting unit 63. Read from the database. Then, the height position control unit 62a and the angular position control unit 62b of the drive controller 62 supply excitation current to the corresponding drive motors M1 and M2 according to the set values read from the setter 63, thereby driving the drive motors M1 and M2. Drive M2.

The adjustment device for the auxiliary nozzle injection position described above adjusts the auxiliary nozzle injection position by a method comprising the following procedure.
(1) At the weaving preparation stage, the input / setting display device 46 sets a database of the above-described contents for the setting device 63.
(2) During weaving, the weft selection signal generator 45 selects the weft according to the set weft selection pattern based on the rotation angle (hereinafter referred to as “crank angle”) signal of the main shaft 41 from the encoder 42. The signal S1 is output to the weft insertion control unit 44 every weaving cycle. The weft insertion control unit 44 selects a weft insertion condition corresponding to the selected weft among a plurality of set weft insertion conditions based on the weft selection signal S1, and electromagnetically opens and closes according to the selected weft insertion condition. The valves 34, 36, 37, etc. are driven to execute the weft insertion of the selected weft. In this embodiment, the weft selection signal S1 is output from the weft selection signal generator 45 after the end of weft insertion and before the start of the next weaving cycle (crank angle 340 °) (for example, crank angle 340 °). Shall be.
(3) The weft selection signal S1 from the weft selection signal generator 45 is also output for each weaving cycle to the drive controller 62 of the auxiliary nozzle controller 61a. Based on the weft selection signal S1, the height position control unit 62a of the drive controller 62 sets the set value of the injection height position of each sub-nozzle group and the stretch nozzle 23 corresponding to the selected weft type. Read from. Similarly, the angular position control unit 62b of the drive controller 62 sets the set value of the injection angular position of each sub-nozzle group corresponding to the selected weft type and the stretch nozzle 23 in response to the input of the weft selection signal S1. (4) Next, the height position control unit 62a of the drive controller 62 makes the injection height position of each sub-nozzle group and the stretch nozzle 23 become the set value based on the read set value. The corresponding height position adjusting drive motors M1 are simultaneously driven. Specifically, the height position control unit 62a of the drive controller 62 obtains a deviation between the set value of the current injection height position and the read set value of the injection height position, and the rotation angle corresponding to the deviation. The excitation current is supplied to the drive motor M1 to rotate the output shaft of the corresponding drive motor M1 for height position adjustment, and the output shaft of the drive motor M1 is rotated. The injection height positions of the sub nozzle group and the stretch nozzle 23 are changed so as to become the set values of the read injection height positions.
The angular position control unit 62b of the drive controller 62 also performs the same processing as the height position control unit 62a to rotate the output shaft of the corresponding angular position adjusting drive motor M2, and as a result, the corresponding sub-nozzle group And the spray angle position of the stretch nozzle 23 is changed to become the set value of the read spray angle position.

  Note that the change in the auxiliary nozzle injection position (driving the drive motors M1 and M2) by the height position control unit 62a and the angular position control unit 62b of the drive controller 62 in (4) is performed by, for example, the weft selection signal S1. It is completed before the start of weft insertion in the next weaving cycle that has occurred. However, since the weft selection signal S1 is output every weaving cycle, in the case of a weft selection pattern in which wefts of the same type are successively inserted, the set value of the injection position read out is the previous value. It may be the same as the weft insertion. In that case, the drive controller 62 determines that the deviation is zero, and drives the drive motors M1 and M2 so that the rotation angle of the output shaft of the drive motors M1 and M2 (the injection position of the auxiliary nozzle) is held at the current position. To control.

  In the apparatus for adjusting the injection position of the auxiliary nozzle according to the present invention described above as an example, in the illustrated example, a configuration using a ball screw mechanism or a rack and pinion mechanism is adopted as the drive transmission mechanism. Rotating gears, worm gears, worm wheels, belts, chains, and the like may be used. Further, as the actuator, instead of the above-described drive motors M1 and M2, a direct drive motor that directly drives a drive target or a direct acting actuator (linear motor) may be used.

  Further, in the illustrated example, a plurality of sub-nozzles 22 included in the sub-nozzle group are connected to one actuator each for height position adjustment and angle position adjustment, and the injection positions of the plurality of sub-nozzles 22 are set in units of sub-nozzle groups. Although it is configured to be adjustable at the same time, instead of this, a plurality of sub nozzles 22 that are smaller than the sub nozzles 22 (four in the illustrated example) constituting the sub nozzle group or the sub nozzles 22 that constitute the sub nozzle group are used. Alternatively, the ejection positions of a large number of the plurality of sub-nozzles 22 may be adjusted simultaneously. Further, a configuration may be adopted in which one actuator for height position adjustment and one for angle position adjustment is connected to each sub-nozzle 22 so that the injection position can be adjusted for each sub-nozzle. However, the sub nozzles 22 whose injection positions are adjusted at the same time are not necessarily connected to a common actuator, and a plurality of sub nozzles 22 connected to different actuators may be adjusted simultaneously and by the same adjustment amount. .

  In the above-described embodiment, the injection angle position is changed in accordance with the weft type to be inserted as the weaving condition. However, the present invention is not limited to this, and other weaving conditions (woven structure, rotational speed of the loom) Etc.), the injection position may be changed. Further, in the case of an air jet loom (for example, a pile loom) in which a plurality of weaving conditions are switched simultaneously during weaving, the weaving pattern can be changed for each weaving pattern in which the plurality of weaving conditions are switched. The injection position may be changed accordingly. In this case, the injection position in consideration of a plurality of weaving conditions in the weaving pattern is set in the database for each weaving pattern.

  In the above embodiment, the drive controller 62 starts control for adjusting the injection position in response to the input of the weft selection signal S1, and the change of the injection position is started until weft insertion in the next weaving cycle is started. Although it has been completed, the start of control (start of driving of the actuator) is not limited to the input time point of the weft selection signal S1, and may be a preset crank angle. However, the crank angle is determined in consideration of the time required to adjust the injection position with respect to the time when weft insertion in the next weaving cycle is started. In this case, the crank angle (set value) is set in the setter 63 and the crank angle signal from the encoder 42 is also output to the drive controller 62 (see the dotted arrow in FIG. 1). ) When the crank angle reaches the set value set in the setting device 63, the drive controller 62 starts control for adjusting the injection position and adjusts the injection position of the auxiliary nozzle.

  Further, when the drive controller 62 starts control according to the crank angle set as described above, the injection positions of the auxiliary nozzles to be adjusted are changed all at once as in the above embodiment. Instead, the injection position can be changed according to the injection timing of each auxiliary nozzle. That is, in a general air jet loom, the injection timing of the sub nozzles 22 is set to be different for each sub nozzle group so that the injection is performed in a relay manner for each sub nozzle group. When adjusting all the sub-nozzles 22 in sub-nozzle group units, the adjustment timing may be varied according to the injection start timing.

  Further, as in the above-described embodiment, when the injection position is adjusted during weaving according to the setting value of the injection position, the adjusted injection position of the auxiliary nozzle is detected and the injection position is set. It may be determined whether or not they coincide with each other, and if a positional deviation occurs with respect to the set injection position, the positional deviation may be corrected. By the way, “when misalignment occurs” means that the injection position is adjusted to the set value due to malfunction of the control due to the influence of disturbance, other parts such as warp, or malfunction of the device. In this case, a deviation occurs between the adjusted injection position and the set value.

  FIG. 4 shows an auxiliary nozzle control device 61b in the auxiliary nozzle injection position adjusting device capable of correcting such positional deviation as a modification of the auxiliary nozzle control device 61a of the embodiment of FIG. Yes. In this adjusting device, each sensor (drive motor M1, M2) or each auxiliary nozzle (one of all the sub-nozzles 22 included in each sub-nozzle group and the stretch nozzle 23) is a sensor (not shown). It is assumed that a sensor for detecting the injection position of the auxiliary nozzle (an injection position detection sensor (specifically, an injection height position detection sensor and an injection angle position detection sensor)) is provided. The auxiliary nozzle control device 61b is configured to detect the injection position in addition to the drive controller 62 (height position control unit 62a and angular position control unit 62b) and the setting device 63 of the auxiliary nozzle control device 61a in the embodiment of FIG. The discriminator 64 is connected to the sensor.

  The discriminator 64 in the auxiliary nozzle control device 61b is also connected to the drive controller 62 so as to be communicable. In such an auxiliary nozzle control device 61b, after the adjustment of the injection position (injection height position and injection angle position) of the auxiliary nozzle to be adjusted, the injection position of the auxiliary nozzle is detected by the injection position detection sensor. The detected value of the injection position is output to the discriminator 64. Then, the discriminator 64 compares the detected value with the set value read from the height position control unit 62a and the angular position control unit 62b of the drive controller 62, and there is a deviation between the comparison results. In this case, the determination result is output to the height position control unit 62a and the angular position control unit 62b of the drive controller 62.

More specifically, the adjustment device corrects the misalignment of the ejection position of the auxiliary nozzle by a method according to the following procedure.
(1) The height position control unit 62a and the angular position control unit 62b of the drive controller 62 rotate the corresponding drive motors M1 and M2 for adjusting the injection position, and then the adjustment target read from the setting unit 63 The set values of the injection positions of the sub nozzles 22 (each sub nozzle group) and the stretch nozzle 23 are output to the discriminator 64.
(2) The injection position detection sensor detects the injection positions of the sub nozzle group and the stretch nozzle 23, and has a predetermined timing (for example, a preset crank angle) after the rotation drive of the output shafts of the drive motors M1 and M2 is completed. ), A detection signal indicating the detected value is output to the discriminator 64.
(3) The discriminator 64 compares the set values of the sub-nozzle group and the stretch nozzle 23 with the detected values for each adjustment target, and if there is a deviation (deviation), the deviation amount (height position) The deviation signal indicating the deviation amount and the rotational angle deviation amount) is output to the height position control unit 62a and the angular position control unit 62b of the drive controller 62 as a determination result. If there is no deviation, it is assumed that there is no deviation amount (= 0), and a deviation signal indicating the deviation amount = 0 is output to the height position control unit 62a and the angular position control unit 62b of the drive controller 62. Or the deviation signal is not output to the drive controller 62.
(4) The height position control unit 62a and the angular position control unit 62b of the drive controller 62, when there is a deviation, in detail, so as to eliminate the deviation amount based on the deviation signal. Excitation current is supplied to the drive motors M1 and M2 to drive the drive motors M1 and M2 so that the output shafts of the drive motors M1 and M2 corresponding to the rotation angle corresponding to the amount = 0 are rotated.
Further, the height position control unit 62a and the angular position control unit 62b of the drive controller 62 are based on a deviation signal indicating that the deviation amount = 0 when there is no deviation, or there is no deviation signal. Based on this, the drive of the drive motor is controlled so that the output shafts of the drive motors M1 and M2 are held at the current angular position.

  Further, in the modification of FIG. 4, it is determined whether or not there is a positional deviation every time the injection position is adjusted. However, not limited to this, every time the injection position is adjusted a plurality of times, the positional deviation is changed. It may be a discriminating one.

  In the embodiment described above, the injection position is changed according to the weaving condition as the weaving condition is switched, but instead, the flying state of the weft is detected and the detection result is It is good also as what changes an injection position based on it.

  That is, in the embodiment of FIG. 1, it is assumed that the flying state of the weft yarn changes as the weaving condition changes, and the injection position is changed as the weaving condition changes. However, the change in the weft flying state is caused by the weft unwinding resistance with the progress of weaving even in the weft unwound from the same yarn feeder (yarn feeder A or yarn feeder B). This may occur due to changes in Therefore, it is good also as what detects the flying state of a weft and adjusts an injection position based on the detection result. Regarding the detection of the weft flying state, the timing (crank angle) when the tip of the weft passes a predetermined position in the weft insertion path changes when the weft flying state changes. For example, a sensor that detects the passage (arrival) of the tip of the weft yarn may be provided at a predetermined intermediate position or a predetermined position on the counter yarn feeding side, and the flying state may be detected by the detection.

  Below, the Example of the adjustment apparatus which adjusts the injection position of an auxiliary nozzle based on the detection result of the above-mentioned weft flying state is described based on FIG. However, since the adjustment device according to this embodiment is basically the same as the embodiment of FIG. 1 except for the auxiliary nozzle control device, only the auxiliary nozzle control device 61c according to this embodiment is shown in FIG. Below, it demonstrates centering on the auxiliary nozzle control apparatus 61c.

  As shown in FIG. 5, the auxiliary nozzle controller 61 c is added to the drive controller 62 (height position controller 62 a and angular position controller 62 b) and the setter 63 of the auxiliary nozzle controller 61 a in the embodiment of FIG. 1. And a comparator 65. Further, it is assumed that the comparator 65 in the auxiliary nozzle control device 61c is communicably connected to the drive controller 62, the setting device 63, and a main control device (not shown).

  In this embodiment, the weft feeler (see FIG. 1) provided outside the warp row on the non-feed side of the air jet loom is used as a sensor (passage detection sensor) for detecting the passage (arrival) of the tip of the weft. Reference) 31 is used. The weft feeler 31 (passage detection sensor) is connected to the main control device, detects that the front end of the weft inserted has reached its detection area, and accordingly sends a weft detection signal. Output to the main controller. Then, based on this weft detection signal, the main control device obtains the weft arrival timing (actual weft arrival timing (detection value)) and outputs the obtained detection value to the comparator 65.

  On the other hand, the setting unit 63 of the auxiliary nozzle control device 61c is set with a reference value that is a target arrival timing, and is made to correspond to a deviation amount between this reference value and the actual weft arrival timing (detection value). The position adjustment amount (height position adjustment amount and angle position adjustment amount) of the auxiliary nozzle is set. Further, the comparator 65 of the auxiliary nozzle control device 61c reads the reference value from the setting device 63 in response to the input of the detection value, and compares the detection value with the reference value. When there is a deviation between the two as a comparison result, the comparator 65 outputs a deviation signal indicating the deviation amount to the height position control unit 62a and the angular position control unit 62b of the drive controller 62. .

More specifically, the adjusting device changes the injection position of the auxiliary nozzle by a method according to the following procedure.
(1) When the passage detection sensor (weft feeler 31) detects the passage of the tip of the weft thread inserted, it outputs a detection signal indicating this to a main controller (not shown).
(2) The main control device obtains the actual weft arrival timing (detection value) based on the detection signal, and outputs the obtained detection value to the comparator 65.
(3) The comparator 65 reads the target arrival timing (reference value) from the setter 63 according to the input of the detection value, and compares the read reference value with the detection value.
(4) If there is a deviation between the reference value and the detected value as a result of the comparison, the comparator 65 sends a deviation signal indicating the deviation amount to the height position control unit 62a of the drive controller 62. And output to the angular position control unit 62b. If there is no deviation, it is determined that there is no deviation amount (= 0), and a deviation signal indicating the deviation amount = 0 is output to the height position control unit 62a and the angular position control unit 62b of the drive controller 62. Alternatively, the deviation signal is not output to the height position control unit 62a and the angular position control unit 62b of the drive controller 62.
(5) When there is a deviation, the height position control unit 62a and the angular position control unit 62b of the drive controller 62, based on the deviation signal, drive motor M1, corresponding to the direction to eliminate the deviation, The output shaft of M2 is rotationally driven to change the injection position. Specifically, the height position control unit 62a and the angle position control unit 62b of the drive controller 62 read out the position adjustment amount corresponding to the deviation amount from the setting device 63, and correspond only to the rotation angle corresponding to the read position adjustment amount. An excitation current is supplied to the corresponding drive motors M1 and M2 so as to rotate the output shafts of the drive motors M1 and M2 to drive the corresponding drive motors M1 and M2.
Further, when there is no deviation, the height position control unit 62a and the angular position control unit 62b of the drive controller 62 are based on a deviation signal indicating that the deviation amount = 0 or there is no deviation signal. Based on this, the drive of the drive motors M1, M2 is controlled so as to hold the output shafts of the drive motors M1, M2 at the current angular position.

  The above processes (1) to (5) may be performed every weft insertion, or may be performed periodically, such as once every several times, or at a specially set time. It may be done. Alternatively, an average value of detection values obtained by the passage detection sensor may be obtained for each preset period, and the average value may be compared with a reference value to determine the presence or absence of a deviation.

  In the adjustment method of the present embodiment described above, the setting device 63 uses the deviation amount as a parameter and the position adjustment amount according to the deviation amount is set. However, the deviation amount and the auxiliary nozzle before adjustment are set. And the position adjustment amount corresponding to them may be set. For example, when the deviation amount is γ, the injection height position of the auxiliary nozzle before the adjustment is h1, and the injection angle position is θ1, the height position adjustment amount is X and the angle position adjustment amount is α. In addition, even if the deviation amount is γ, if the injection height position of the auxiliary nozzle before the adjustment is h2 and the injection angle position is θ2, the height position adjustment amount is Y, Let the angle adjustment amount be β. In this way, the position adjustment amount is set more precisely.

  Further, the position adjustment amount corresponding to the deviation amount is set in advance, and the corresponding drive motors M1 and M2 are driven according to the obtained deviation amount. Instead, only the direction of the deviation is provided. It is good also as what adjusts only a predetermined position adjustment amount based on this. The direction of deviation referred to here is the magnitude relationship of the detected value with respect to the reference value, and is either + or-. In this case, only a predetermined position adjustment amount is set in the setting device 63 instead of the position adjustment amount corresponding to the deviation amount. However, the position adjustment amount set in the setting device 63 may be different depending on the deviation direction (+, −).

  Specifically, in the control (5), when a deviation occurs, the height position control unit 62a and the angular position control unit 62b of the drive controller 62 are positioned according to the input of the deviation signal. The adjustment amount is read from the setting device 63, and is driven so that the output shafts of the drive motors M1 and M2 are rotated in the direction corresponding to the deviation direction indicated by the deviation signal by the rotation angle corresponding to the read position adjustment amount. Excitation current is supplied to the motors M1 and M2, and the drive motors M1 and M2 are driven. Then, the above-described (1) to (4) and the process of (5) including the current correspondence considering only the direction of the deviation are repeated until the deviation is eliminated.

  By the way, in the above, the detection of the weft flying state is detected at the timing when the tip of the weft reaches the arrangement position of the weft feeler 31 provided on the non-feed side of the weft insertion path. Not limited to this, it may be performed by detecting the timing at which the tip of the weft reaches an intermediate predetermined position in the weft insertion path in the weaving width direction (hereinafter simply referred to as “intermediate predetermined position”). For detection in this case, an unwinding sensor attached to the length measuring storage device 13 or a dedicated sensor provided at an intermediate predetermined position is used in place of the weft feeler 31 on the counterfeed side.

  For example, in the case where an unwinding sensor is used, this unwinding sensor is attached to the length measurement storage device 13 described in the embodiment of FIG. 1 and is wound around the drum 15 of the length measurement storage device 13. It detects the unwinding of each weft yarn. More specifically, a weft having a length necessary for one weft insertion is wound around the outer peripheral surface of the drum 15 of the length measuring storage device 13 shown in FIG. Has been. At the start of weft insertion, the locking pin 16 retreats from the outer peripheral surface of the drum 15 to release the weft locking, and the main nozzle 21 performs the injection operation, so that the weft is unwound from the drum 15. Weft insertion is performed. At this time, the unwinding sensor detects the number of times the unwound weft has crossed the sensor area of the unwinding sensor, and outputs the signal to the weft insertion control device 43 (weft insertion control unit 44) and the like. As a result, the weft insertion control device 43 grasps that the weft of a predetermined length has been unwound from the drum 15, and based on that, the weft thread is again locked by the locking pin 16, so that the predetermined length is reached. Insert the weft.

  In the case where the unwinding sensor is used, for example, if wefts of a length necessary for one weft insertion are four turns with respect to the drum 15, two wefts are unwound during actual weft insertion ( The detection timing corresponds to the end of the weft reaching an intermediate predetermined position. Thus, based on the signal from the unraveling sensor, for example, the main controller may determine the timing (detected value) based on the crank angle and output the determined detected value to the comparator 65. In this case, the setting unit 63 is set with a crank angle as a reference value for the timing at which the two wefts are unwound. And the comparator 65 should just compare the said reference value and the said detected value.

  When a dedicated sensor is used, a sensor is provided so that the tip of the weft can be detected in the vicinity of an intermediate predetermined position, and the setting device 63 has a timing at which the tip of the weft passes through the position of the sensor. It is assumed that the reference value is set by the crank angle. Then, based on the signal from the sensor, for example, the main controller determines the arrival timing (detection value) of the weft at an intermediate predetermined position based on the crank angle, and the comparator 65 calculates the detection value and the What is necessary is just to compare with a reference value.

  The present invention is not limited to the embodiments described above, and the following modifications are possible.

  In the above embodiment, all auxiliary nozzles (sub nozzles 22 and stretch nozzles 23 included in all sub nozzle groups) are targeted for adjustment, and the injection positions of all these sub nozzles 22 and stretch nozzles 23 are adjusted, that is, on the loom. Although all the auxiliary nozzles are to be adjusted, the present invention is not limited to this, and in the adjusting device according to the present invention, only some of the sub nozzles 22 may be adjusted.

  For example, when all sub-nozzles 22 included in the sub-nozzle group are set as adjustment targets, they are included in a sub-nozzle group (for example, a sub-nozzle group located in the middle of the weaving width direction) that has little influence on the weft flying state. All the sub nozzles 22 may be excluded from the adjustment targets. Further, only some of the sub-nozzles 22 included in all or part of the sub-nozzle groups may be auxiliary nozzles to be adjusted. Even in this case, the same effect as the above-described embodiment can be obtained.

  The stretch nozzle 23 may also be excluded from the auxiliary nozzles to be adjusted. The stretch nozzle 23 is for the purpose of maintaining the stretched state of the weft thread inserted rather than the weft flight, but adjusting the spray position of the stretch nozzle 23 has an effect on the stretched state of the weft thread. When changing a small weaving condition or the like, the stretch nozzle 23 may be excluded from the adjustment target.

  Moreover, in the said Example, although it shall adjust with respect to both the injection height position and the injection angle position, it is not restricted to this, You may adjust only either of the said both.

  Furthermore, in the said Example, although applied to the air injection type loom which inserts two types of wefts, it is not limited to this, It is applied to the air injection type loom which inserts one type or three or more types of wefts. It may be a thing.

A feed body B feed body a weft b weft S1 weft selection signal M1 drive motor M2 drive motor

11 Weft insertion device 12 Yarn feeder stand 13 Length measuring storage device 14 Yarn winding arm 15 Drum 16 Locking pin 17 Operator 21 Main nozzle 22 Sub nozzle 22a Air injection port 22b Stepped portion 22c Tube 23 Stretch nozzle 24 Nozzle holder (Support body)
25 Lead holder 31 Weft feeler (passage detection sensor)
32 pressure air source 33 pressure regulator 34 electromagnetic on-off valve 35 pressure regulator 36 electromagnetic on-off valve 37 electromagnetic on-off valve 41 spindle 42 encoder 43 weft insertion control unit 44 weft insertion control unit 45 weft selection signal generation unit 46 input / setting display device 51 rack 52 pinion 53 pinion 61a auxiliary nozzle control device (control device)
61b Auxiliary nozzle control device (control device)
61c auxiliary nozzle control device (control device)
62 Drive controller 62a Height position controller 62b Angular position controller 63 Setter 64 Discriminator 65 Comparator 71 Drive transmission mechanism 72 Elevator 73 Base member 74 Support column 75 Guide member 75a Guide groove 76 Guide hole 77 Guide rod 78 Member 79 bracket 79a through hole 81 female screw hole 82 through hole 83 male screw member

Claims (12)

In an air jet loom having an auxiliary nozzle including a number of sub-nozzles arranged along a weft insertion path, and weaving is performed with a change in the weaving state during weaving,
At least one of the auxiliary nozzles is set as an adjustment target, and the injection position of the auxiliary nozzle to be adjusted can be adjusted by an actuator.
A method for adjusting the injection position of an auxiliary nozzle in an air jet loom, wherein the injection position of the auxiliary nozzle to be adjusted is adjusted with a change in the weaving state during weaving.   The method for adjusting the injection position of the auxiliary nozzle according to claim 1, wherein the auxiliary nozzle includes, in addition to the sub-nozzle, a stretch nozzle arranged in parallel on the yarn feeding side of the sub-nozzle. The air jet loom is a loom that changes the weaving conditions during weaving according to a plurality of preset weaving conditions,
A database including the injection position corresponding to each of the set weaving conditions is set in advance,
3. When changing the weaving condition, the injection position corresponding to the changed weaving condition is selected from the database, and the actuator is driven based on the selected injection position. The method for adjusting the injection position of the auxiliary nozzle as described. The loom having a multi-color weft insertion device for selectively wefting two or more wefts having different yarn types during weaving according to the weft selection pattern set as the weaving condition, wherein the air jet loom comprises:
In the database, the injection position corresponding to each weft thread to be inserted is set,
4. The method of adjusting an injection position of an auxiliary nozzle according to claim 3, wherein the actuator is driven based on the injection position corresponding to the weft after switching as the weft is switched during weaving. Detecting the injection position after the change of the injection position, comparing the detection value and the injection position selected according to the weaving conditions,
The method for adjusting the injection position of the auxiliary nozzle according to claim 3 or 4, wherein when there is a deviation between the two, the actuator is driven so as to eliminate the deviation. The air jet loom is provided with a passage detection sensor for detecting the passage of the tip of the weft thread to be inserted, and a reference value relating to the rotation angle of the loom spindle at the time when the tip of the weft passes the position of the passage detection sensor is preset. Aside,
The reference value is compared with the rotation angle when the weft is actually detected, and when a deviation occurs between the two, the actuator is driven in a direction to eliminate the deviation. The adjustment method of the injection position of the auxiliary nozzle of 1 or 2. A device for adjusting the injection position of an auxiliary nozzle in an air jet loom having an auxiliary nozzle including a plurality of sub nozzles arranged along a weft insertion path, wherein weaving is performed with a change in the weaving state during weaving. There,
At least one of the auxiliary nozzles to be adjusted is supported so that the injection position can be adjusted with respect to a support that supports the auxiliary nozzle, and the drive device for adjusting the injection position of the auxiliary nozzle to be adjusted Including
The driving device controls the driving of the actuator so as to adjust the injection position of the auxiliary nozzle to be adjusted in accordance with the change of the weaving state during weaving and the actuator connected to the auxiliary nozzle to be adjusted And a device for adjusting the injection position of the auxiliary nozzle in the air jet loom.   8. The apparatus for adjusting the injection position of an auxiliary nozzle in an air-jet loom according to claim 7, wherein the auxiliary nozzle includes, in addition to the sub-nozzles, stretch nozzles arranged side by side on the side opposite to the yarn feeding side of the sub-nozzles. . The air jet loom is a loom that changes the weaving conditions during weaving according to a plurality of weaving conditions set in advance in the loom,
The control device sets a database including the injection position corresponding to each of the plurality of set weaving conditions, and selects the injection position corresponding to the weaving conditions set from the database. The air-jet loom according to claim 7 or 8, further comprising a drive controller that controls driving of an actuator coupled to the auxiliary nozzle to be adjusted based on the selected injection position. Device for adjusting the injection position of the auxiliary nozzle. The air jet loom is a multi-color weft insertion device that selectively wefts two or more wefts of different yarn types according to a weft selection pattern set as the weaving condition, and selects a weft according to the weft selection pattern A loom including a multi-color weft insertion device including a weft selection signal generating unit for outputting a signal,
In the setting device, a database including the injection position corresponding to each weft to be inserted is set,
The drive controller reads out the setting value of the injection position of the auxiliary nozzle corresponding to the selected weft from the database in accordance with the input of the weft selection signal from the weft selection signal generator. The adjustment apparatus of the injection position of the auxiliary nozzle in the air injection type loom of description. With an injection position detection sensor for detecting the injection position,
A discriminator for comparing the detected value of the injection position detection sensor after the control device has changed the injection position with the injection position selected in accordance with the weaving conditions;
The drive controller drives the actuator so as to eliminate the deviation when there is a deviation between the injection position selected as the comparison result by the discriminator and the detection value of the sensor. The apparatus for adjusting the injection position of the auxiliary nozzle in the air-jet loom according to claim 9 or 10. The air jet loom comprises a passage detection sensor for detecting the passage of the tip of a weft thread to be inserted,
The control device sets a reference value for a rotation angle of the loom main shaft at the time when the tip of the weft passes through the position of the passage detection sensor, and the weft is detected by the passage detection sensor when the reference value and the weft insertion. A comparator for comparing the rotation angle at the time of being generated, and a drive controller for controlling the driving of the actuator in a direction to eliminate the deviation when a deviation occurs between the two as a comparison result by the comparator; The apparatus for adjusting the injection position of the auxiliary nozzle in the air-injecting loom according to claim 7 or 8.

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