Mispicked weft removing method

Abstract: When mispicking occurs, a weft yarn (1) continuous to a mispicked weft yarn (1a) is inserted into the shed (6) of warp yarns in a loop by the jetting of a main picking nozzle (4) and auxiliary picking nozzles (9), a weft yarn retaining member (20) is located in the loop of the weft yarn (1) and the mispicked weft yarn (1a) is pulled to be removed from the picking side by way of the weft yarn (1), wherein given auxiliary picking nozzles (9) stops jetting when the weft yarn (1) is picked in a loop so that the tip end of the loop of the picked weft yarn (1) may not get out of the shed of the warp yarns more than necessary.

Description: The present invention relates to a method of removing a mispicked weft in a shed. A basic method of removing a mispicked weft in the shed of warp yarns by inserting the same from the picking side is proposed in EP-A 0 492 461, wherein a weft yarn continuous to the mispicked weft yarn is inserted into the same shed as the mispicked weft yarn in a U-shaped loop and a weft yarn retaining member serving as a yarn guide is inserted into the looped weft yarn and thereafter the weft yarn is pulled from the picking side so as to remove the mispicked weft yarn connected thereto. A main nozzle and all auxiliary picking nozzles jet a picking fluid all together in picking, during which a part of the mispicked weft yarn on the picking side is peeled off the cloth fell. According to the technique set forth above, however, since the mispicked weft yarns are not equally peeled off the cloth fell, the picked weft yarn is transferred more than necessary depending on the distance by which the mispicked weft yarn is peeled off the cloth fell even if the inserting length is regulated, so that it is liable to be caught by such a member as a weft feeler, a feeler cable or a saddle on the arriving side and consequently it is liable to be broken when it is further pulled being caught thereby, which results in a uncertain removal operation of the mispicked weft yarn. A mispicked weft removing method comprising the steps of inserting a weft yarn, which is inside a main picking nozzle, and which further is continuous to a mispicked weft yarn, into the shed of warp yarns in a loop by the jetting of said main picking nozzle and auxiliary picking nozzles when mispicking occurs, and pulling said weft yarn after locating a pulling member in said looped weft yarn in said shed of said warp yarns is disclosed in EP-A 0 330 023. In this method, the mispicked weft yarn is extracted from the arriving side of the weft yarn at the side opposite to the main picking nozzle by a withdrawing mechanism, which is not shown, so that the weft yarn continuous to the mispicked weft yarn must be inserted until it reaches the withdrawing mechanism. Although a countermeasure to insert the weft yarn so short as to remain in the shed of the warp yarns can be considered, it is not practicable because of the following reasons. That is, the end of the looped weft yarn on the side of the mispicked weft yarn is preferable to be as close as the arriving side when inserting is completed in order to form a wide-open U-shaped loop of the weft yarn so as to facilitate the entry of the retaining member adjacent to the picking side into the loop after inserting. In other words, the mispicked weft yarn is preferable to be peeled off the cloth fell to some extent in picking, but when the weft yarn is inserted short, the auxiliary picking nozzle does not apply a sufficient picking force to the weft yarn in the shed so that the mispicked weft yarn is not peeled off sufficiently toward the arriving side and the end of the looped weft yarn to be inserted cannot arrive at the vicinity of the arriving side. As a result, the weft yarn should be inserted more than a minimum length. This is a first problem. Moreover, they describe that a weft yarn guide is indispensable for performing the aforementioned method in order to reverse the pulling direction of the mispicked weft yarn to the direction reverse to that of pulling the weft yarn. For this purpose, the weft yarn guide has to be inserted in the preparatory stage of removing the mispicked weft yarn by an inserting means such as an air cylinder etc., which results in a complicated construction. This is a second problem. It is the first object of the present invention to solve the first problem, i.e., preventing the members provided outside of the shed of the warp yarns from interfering with the inserted weft yarn so as to perform the mispicked weft yarn removing operation with certainty by inserting the weft yarn while preventing the tip end of the weft yarn from getting out of the shed of the warp yarns more than necessary. This object is solved by any of the claims 1 to 3. As a result, the weft yarns are prevented from being caught by a member such as a weft feeler etc. at the looped portion thereof, and the removal operation thereafter is performed with certainty. It is the second object of the present invention to solve the second problem set forth above, i.e., reversing the pulling direction of the mispicked weft yarn continuous to the weft yarn without providing a specific weft yarn guide in the shed in the process of pulling the weft yarn from the picking side. In order to attain the aforementioned second object, the method according to the present invention as claimed in claim 4 comprises the steps of inserting a weft yarn continuous to a mispicked weft yarn into the same shed as the mispicked weft yarn as a U-shaped loop in an air jet room provided with auxiliary picking nozzles after the mispicking takes place, allowing the weft yarn to fall from the traveling path of the weft yarn by gravity at least by stopping the jetting of the auxiliary picking nozzles so as to let an auxiliary nozzle be relatively located in the U-shaped loop and reversing the pulling direction of the mispicked weft yarn by way of the auxiliary picking nozzle located in the loop by pulling the weft yarn from the picking side so as to peel the mispicked weft yarn off the fell of cloth. In this way, since the auxiliary picking nozzle is employed as a guide means for pulling the weft yarn continuous to the mispicked weft yarn, the displaceable weft yarn guide member set forth above and consequently the inserting operation of the same and a driving means for driving the same are not necessary, so that the construction of the loom can be simplified. Figs. 1 to 4 are views for explaining the mispicked weft removing operation according to a first embodiment of the present invention. Fig. 5 is an enlarged side view showing a reed, the shed of warp yarns, a weft yarn retaining member and an auxiliary picking nozzle. Fig. 6 is a view for explaining the mispicked weft yarn removing operation according to a modified first embodiment of the present invention. Figs. 7 to 14 are views for explaining the mispicked weft yearn removing method according to the second embodiment of the present invention. Fig. 15 is an enlarged front view showing a mounting portion on which a blowing-up nozzle, an intermediate guide and the like are mounted. Fig. 16 is an enlarged side view showing a mounting portion on which a blowing-up nozzle, an intermediate guide and the like are mounted. FIRST EMBODIMENT Figs. 1 to 4 show the operation of the mispicked weft yarn removing method according to the first embodiment of the present invention in relation to picking operation. The weft yarn 1 supplied by a feed yarn package 2 is measured, for example, for five rolls corresponding to the length of one pick by a drum type weft measuring and storing device 3 and is stored thereon until the time of picking, when the weft measuring and storing device 3 unwinds five rolls of the weft yarn 1 and supplies the same to a main picking nozzle 4 on the picking side by retracting the weft yarn retaining pin 31 from a drum 32. At that time, the main picking nozzle 4 picks the weft yarn 1 which passes therethrough into the shed 6 of warp yarns 5 together with a picking fluid by jetting the same toward the shed 6 of the warp yarns 5. In the picking process, a plurality of auxiliary picking nozzles 9 arranged along the traveling path of the weft yarn 1 in the shed 6 accelerate the weft yarn 1 in the traveling direction thereof by jetting air simultaneously or in relays in synchronism with the traveling speed of the weft yarn 1. A normal picking state is detected by a weft yarn feeler 7 on the arriving side, i.e., on the side opposite the picking side of the loom. The weft yarn feeler 7 detects the tip end of the picked weft yarn 1 and confirm the normal picking state and thereafter the weft yarn inside the shed 6 is woven into the cloth fell 12 to become a woven fabric 10 by the beating of the reed 11. A feed yarn cutter 8 on the picking side separates the picked weft yarn 1 in the shed 6 from that inside the main picking nozzle 4 by cutting that between the main picking nozzle 4 and the picking side of the cloth fell of the woven fabric 10. When mispicking occurs as illustrated in Fig. 1 in such a picking process, the weft yarn feeler 7 detects the mispicking state and supplies a signal for stopping the picking to a control system of the loom, not shown. The removal operation of the mispicked weft yarn starts upon reception of the loom stop signal. At first, the operation of preventing the mispicked weft yarn 1a from being separated from the weft yarn 1 inside the main picking nozzle 4 by the feed yarn cutter 8. For example, the main picking nozzle 4 stops its weak continuous jetting, a roll of weft yarn 1 is unwound from the weft measuring and storing device 3, the blowing-up nozzle 22 starts jetting and an air current is generated inside a guide hood 33 of a mispicked weft removing device 21 to take the mispicked weft yarn 1a therein before the feed yarn cutter 8 starts its operation. As a result, the weft yarn 1 located at the tip end portion of the main picking nozzle 4 is blown up toward the guide hood 33 of the mispicked weft removing device 21 forming a loop so as to be guided to a position where it is not cut by the feed yarn cutter 8. Thereafter the loom stops adjacent to a first stopping position (260°). In this way the weft yarn 1 supplied by the main picking nozzle 4 is prevented from being cut by the feed yarn cutter 8 and is guided into the guide hood 33 by the blowing operation of the blowing-up nozzle 22 and the sucking operation inside the guide hood 33. Thereafter the loom automatically makes more than a turn reversely and stops adjacent to a second stopping position (200°). Then the blowing-up nozzle 22 stops jetting. In this way the mispicked weft yarn 1a which is continuous to the weft yarn 1 inside the main picking nozzle 4 is exposed in front of the cloth fell 12 so as to be removable in the so-called pick finding state. Subsequently, the sucking operation inside the guide hood 33 is stopped, the main picking nozzle 4 and the auxiliary picking nozzles 9 start jetting and the weft measuring and storing device 3 unwinds, for example, three rolls of the weft yarn 1 on the drum 32 thereof so as to insert the unwound weft yarn 1 forming a U-shaped loop into the shed 6 of the warp yarns 5 by the jetting of the main picking nozzle 4 and the auxiliary picking nozzles 9. In the process of inserting the weft yarn 1 in the looped shape, the picking side portion of the mispicked weft yarn 1a is peeled off the cloth fell 12 by the pulling force during the inserting operation. In this way, the weft 1 newly inserted into the shed 6 and the mispicked weft 1a extend continuously in the shed 6 in a shape of Z in a plan view as shown in Fig. 3 and the tip end portion, i.e., the portion opposite the picking side of the weft 1 newly inserted into the shed 6 is folded back toward the arriving side so as to form a U-shaped loop. In this state, almost all the auxiliary picking nozzles 9 arranged between the picking side and the vicinity of the arriving side of the shed 6 are jetting, but given auxiliary picking nozzles 9 on the arriving side are set to be inactive. The given auxiliary picking nozzles 9 are those of the auxiliary picking nozzle group (an auxiliary picking nozzle group is composed of a pair of auxiliary picking nozzles) which is positioned on the side most opposite to the picking side according to this embodiment. The given auxiliary picking nozzle or nozzles 9 mean an auxiliary picking nozzle 9 or a group of auxiliary picking nozzles 9 which stop the unnecessary transfer of the weft yarn 1 outside of the shed 6 of the warp yarns 5 when they stop jetting other than those which contribute to the transfer of the weft yarn 1 from the picking side to the retaining member 20, described later, in the shed 6. Taking the inertia of the traveling weft yarn 1 into consideration, the auxiliary picking nozzles 9 which contribute to the transfer of the weft yarn 1 do not always mean all the auxiliary picking nozzles 9 arranged between the picking side of the shed 6 and the position thereof where the retaining member 20 is provided, but sometimes may mean those between the picking side of the shed 6 and a position thereof which is a little short of the retaining pin 20. Accordingly, the weft yarn 1 which is newly picked for removing the mispicked weft yarn 1a is accelerated by the auxiliary picking nozzles 9 which are continuously jetting but the U-shaped tip end portion thereof which reaches the area of the inactive auxiliary picking nozzles 9 is not accelerated so that the mispicked weft yarn 1a is no longer peeled off the cloth fell and does not get out of the arriving side of the shed 6 more than necessary since the given auxiliary picking nozzles 9 on the arriving side do not jet. Otherwise, the weft yarn 1 may be picked by the simultaneous jetting of the main picking nozzle 4 and auxiliary picking nozzles 9 and thereafter retracting the weft yarn retaining pin 31 after starting the jetting, or by retracting the weft yarn retaining pin 31 and allowing a plurality of auxiliary picking nozzles 9 arranged in the traveling direction of the weft yarn 1 to perform jetting in relays just after the main picking nozzle 4 starts jetting. Thereafter, the weft yarn retaining member 20 of the weft yarn 1 is inserted into the looped weft yarn 1 in the shed 6 from above the warp yarns 5 or from below the warp yarns 5 as illustrated in Fig. 4. Subsequently the main picking nozzle 4 and the auxiliary picking nozzles 9 stop jetting. The weft yarn retaining member 20 is supported by an operating portion 23 such as the piston rod of a pneumatic cylinder actuator so as to be vertically movable for entering the shed 6 from a standby position when the mispicked weft yarn 1a is removed. There is no need to provide the weft yarn retaining member 20 for exclusive use, but an auxiliary picking nozzle 9 located at a position about which the weft yarn 1 is looped can be also used for the weft yarn retaining member 20. In this case, it is enough to let the weft yarn 1 drop from the traveling path thereof so as to relatively let one of the auxiliary picking nozzles 9 be positioned in the loop by stopping the jetting of all the auxiliary picking nozzles 9 or the auxiliary picking nozzles 9 near the arriving side after the weft yarn 1 is picked in a looped shape. Thus the auxiliary picking nozzle 9 which happened to be inside the loop of the weft yarn 1 can be used as a weft yarn retaining member 20. Subsequently, the blowing-up nozzle 22 starts jetting, the weft measuring and storing device 3 releases the weft 1 of a length necessary for removing the mispicked weft 1a, the guide hood 33 starts suction and the main picking nozzle 4 has stopped jetting, so that the weft yarn 1 inside the main picking nozzle 4 enters the guide hood 33 by the air current from the blowing-up nozzle 22. When a yarn sensor etc. inside the weft yarn removing device 21 detects the entry of the weft yarn 1, the weft yarn removing device 21 hold the weft yarn 1 which has been sucked therein in preparation of the pulling operation of the weft yarn 1 and the mispicked weft yarn 1a continuous thereto. Thereafter, the blowing-up nozzle 22 stops jetting and the main picking nozzle 4 starts a weak continuous jetting in preparation for cutting the weft yarn 1. At this time, the guide hood 33 stops suction and the cutter 30 at the tip end of the main picking nozzle 4 cuts the weft yarn 1 so that the weft yarn 1 inside the main picking nozzle 4 is separated from the portion for removing the weft yarn 1. Then the weft yarn removing device 21 pulls the weft yarn 1 from the picking side by winding or sucking operation so as to extract the mispicked weft yarn 1a by way of the weft yarn 1 continuous thereto from the cloth fell in a pick finding state. The weft yarn 1 is brought into contact with the weft yarn retaining member 20 and is folded back thereabout, so that the mispicked weft yarn 1a is pulled toward the arriving side and is folded back in a hairpin shape in front of the cloth fell 12 and is peeled off therefrom. Upon completion of the extraction, the components which have worked for the extraction are stopped or set to the standby state and the weft yarn 1 and the mispicked weft yarn 1a which have been wound up are discharged to a trash box etc. At that time, the blowing-up nozzle 22 temporarily perform jetting to help discharging the mispicked weft yarn 1a. Meanwhile, the loom is automatically reversely rotated to stop adjacent to a third stopping position (300°) for starting a continuous operation. Thereafter the blowing-up nozzle 22 is set to be inactive and the guide hood 33 stops suction. The continuous operation starts upon reception of next operating instruction. It is preferable to advance a mesh shield plate 34 at least to the extension of the traveling path of the weft yarn 1 on the arriving side of the shed 6 when the weft yarn 1 is picked in the shed 6 in a loop, so as to prevent the weft yarn 1 from going out of the arriving side of the shed 6 and consequently from becoming entangled with members such as a weft yarn feeler 7 as exemplified in Fig. 6. When the weft yarn 1 is picked into the shed 6 in a loop, the auxiliary picking nozzles 9 may perform jetting according to the embodiment set forth above or prior arts. It is also possible to provide a sensor 35 at a proper position adjacent to the traveling path of the weft yarn 1 in the shed 6 of the warp yarns 5 as illustrated in the same figure 6 for stopping the jetting of all the auxiliary picking nozzles 9 or given auxiliary picking nozzles 9 on the arriving side relative to the sensor 35 when the same detects the tip end of the looped weft yarn 1. In this way the weft yarn 1 can be prevented from getting out of the arriving side of the shed 6 more than necessary in picking. It is also possible to restrain the weft yarn 1 from getting out of the shed 6 more than necessary by stopping the jetting of given auxiliary picking nozzles 9 when a given time has passed after the start of inserting the looped weft yarn (at a proper time before the tip end of the looped weft yarn 1 gets out of the shed 6 of the warp yarns 5). Moreover, it is also possible to insert a stop pin 36 into the shed 6 from above or from below before the weft yarn 1 is inserted in a loop in order to regulate the position where the mispicked weft yarn 1a is separated from the cloth fell 12 as illustrated in Fig. 6. According to this method, the mispicked weft yarn 1a is retained by the stop pin 36 so that the mispicked weft yarn 1a is limited in being separated from the cloth fell 12 and the tip end of the looped portion of the weft yarn 1 does not move toward the arriving side more than necessary, whereby the looped weft yarn 1 is prevented from becoming entangled with members such as the weft yarn feeler 7 on the arriving side. According to this embodiment, the looped portion of the weft yarn does not get out of the arriving side of the shed of the warp yarns more than necessary since given auxiliary picking nozzles are stopped when the weft yarn is inserted in a loop in the process of inserting the weft yarn continuous to the mispicked weft yarn in the shed of the warp yarns in a loop and pulling the same to remove the mispicked weft yarn continuous thereto from the picking side while locating a weft yarn retaining member in the loop, so that the weft yarn can be inserted in a loop correctly and the mispicked weft yarn is removed with certainty as the newly inserted weft yarn in a loop is prevented from becoming entangled with other members such as a weft yarn feeler. Providing the shield plate on the arriving side of the shed on the extension of the traveling path of the weft yarn or inserting a stop pin into the shed of the warp yarns can obtain the same effect as set forth above since the looped portion of the weft yarn can be prevented from getting out of the shed. SECOND EMBODIMENT Figs. 7 to 14 show the operation of the mispicked weft yarn removing method according to a second embodiment of the present invention in relation with picking. The second embodiment uses the auxiliary picking nozzles 9 for the movable retaining member 20 in the first embodiment. Accordingly, it does not matter whether given auxiliary picking nozzles 9 on the arriving side are stopped in inserting the weft yarn 1 as according to the first embodiment or not although the same method as the first embodiment is exemplified for explanation. As understood from the above description, the difference between the first and second embodiments is that one of the auxiliary picking nozzles 9 is used for the movable retaining member 20 according to the second embodiment. Since it has been already described in the first embodiment, only the difference between the two embodiments in drawing will be described hereinafter. Figs. 7, 9, 11 and 13 which show the second embodiment respectively correspond to Figs. 1, 2, 3 and 4 which show the first embodiment, and the difference therebetween is the movable retaining member 20 which is provided in the first embodiment but not in the second embodiment as evident from Fig. 13. Figs. 8, 10, 12 and 14 respectively show the main portions of Figs. 7, 9, 11 and 13. The blowing-up nozzle 22 and the guide 43 are mounted on a sley 45 on the front side of the reed 11 and the like directly or by way of a bracket 44 etc. as illustrated in Figs. 15 and 16. Particularly the intermediate guide 42 which has a U-shaped cross section with the opening directed toward the front side and is rotatably fixed to a bracket 46 mounted on a loom frame 47 etc. by a set of horizontal fitting bolt and nut 48 confronts the upper opening of the cylindrical guide 43 which moves together with the retracted reed 11 at the lower end thereof and confronts the lower opening of the guide hood 33 at the upper end thereof. When a weft yarn 1 is newly inserted into the shed 6 of the warp yarns 5 for removing the mispicked weft yarn 1a, it is recommended to start inserting by the jetting of the main picking nozzle 4 and the auxiliary picking nozzles 9 before the weft yarn 1 which has been blown up by the blowing-up 22 comes down. The mispicked weft yarn 1a is peeled off the cloth fell 12 at the picking side thereof as it is pulled by the picked weft yarn 1. In this way, the weft 1 newly inserted into the shed 6 and the mispicked weft 1a extend continuously in the shed 6 in a shape of Z in a plan view as shown in Fig. 12 and the tip end portion, i.e., the portion opposite the picking side of the weft 1 newly inserted into the shed 6 is folded back toward the arriving side so as to form a U-shaped loop. When the main picking nozzle 4 and the auxiliary picking nozzles 9 stop jetting, the weft yarn 1 and the mispicked weft yarn 1a continuous thereto drop by gravity. At that time, an auxiliary picking nozzle 9 enters the U-shaped loop of the weft yarn 1 continuous to the mispicked weft yarn 1a. In other words, the weft yarn 1 continuous to the mispicked weft yarn 1a lies about the upper portion of the auxiliary picking nozzle 9 on the arriving side forming a U-shaped loop. That is, the auxiliary picking nozzle 9 exists inside the loop of the weft yarn 1. At that time, almost all the auxiliary picking nozzles 9 are performing jetting, but given auxiliary picking nozzles 9, for example, two auxiliary picking nozzles 9 are set to be inactive at need. Since the given auxiliary picking nozzles 9 on the arriving side do not perform jetting, the newly picked weft yarn 1 which have been accelerated by the auxiliary picking nozzles 9 which continue jetting lose the acceleration at the position of the auxiliary picking nozzles which are inactive so that it does not get out of the arriving side more than necessary. The weft yarn removing device 21 pulls the weft yarn 1 from the picking side by winding or sucking operation to extract the mispicked weft yarn 1a by way of the weft yarn 1 continuous thereto from the cloth fell 12 in the picking state as illustrated in Figs. 13 and 14. In the course of the extraction, the weft yarn 1 is folded back as it becomes into contact with an auxiliary picking nozzle 9 so that it is pulled reversely. As a result, the mispicked weft yarn 1a is always extracted from the arriving side, so that the mispicked weft yarn 1a is folded back in a hairpin shape at the cloth fell 12 and extracted therefrom by a force applied thereto in the direction to separate the same from the cloth fell 12. Since the position where the loop of the weft yarn 1 is formed can be previously set by the released length of the weft yarn 1, the auxiliary picking nozzle 9 for folding back the weft yarn 1 can be specified. At that time, the folded back weft yarn 1 can correspond to the auxiliary picking nozzle 9 with certainty by mounting the specified auxiliary picking nozzle higher than other auxiliary picking nozzles 9. The weft yarn 1 is blown up for preventing the mispicked weft yarn 1a from being cut by the feed yarn cutter 8 according to the first and second embodiments set forth above, but the well-known method such as stopping the operation of the feed yarn cutter 8 per se or interposing a shield plate in the operating area of the feed yarn cutter 8 may be employed thereinstead. In the same way, the weft yarn is blown up to introduce the same continuous to the mispicked weft yarn into the weft yarn removing device according to the aforementioned embodiment, it may be replaced by a well-known method. The weft yarn removing device 21 is not limited to the winding type so long as it draws the weft yarn from the picking side. When the weft yarn 1 is picked in a loop, it is also possible to provide auxiliary picking nozzle type picking nozzles 9 on the arriving side directed toward the direction reverse to the traveling direction of the weft yarn 1, i.e., the picking side, which jet only when the weft yarn 1 is picked in a loop so as to prevent the tip end of the weft yarn 1 from getting out of the arriving side of the shed of the warp yarns 5 more than necessary. A retaining member may be mounted on the sley 45 in the same way as the auxiliary picking nozzle 9 instead of using the auxiliary picking nozzle 9 per se as the retaining member. In this case, it is advantageous that the retaining member has a shape similar to the auxiliary picking nozzle 9 and projects at a position higher than the auxiliary picking nozzle 9 for protecting the warp yarns from being injured in weaving. Since the auxiliary picking nozzle located in the U-shaped loop of the weft yarn reverses the drawing direction of the weft yarn according to the aforementioned embodiment, there is no need of a specific member for reversing the drawing direction of the weft yarn and there is also no need of driving means for vertically moving the specific member so that the construction can be simplified. Even if the weft yarn is not retained by the target auxiliary picking nozzle in the shed in the process of drawing the weft yarn, any of a plurality of auxiliary picking nozzles arranged in the picking direction of the weft yarn is located inside the loop of the weft yarn so as to serve as a retaining member, which eliminates the improper correspondence between the looped weft yarn and the yarn guide and makes the weft yarn removing operation more certain.

Claims: A mispicked weft removing method comprising the steps of: inserting a weft yarn (1), which is inside a main picking nozzle (4), and which further is continuous to a mispicked weft yarn (1a), into the shed (6) of warp yarns (5) in a loop by the jetting of said main picking nozzle (4) and auxiliary picking nozzles (9) when mispicking occurs; and pulling said weft yarn (1) from the picking side after locating a retaining member (9, 20) in said loop of said weft yarn (1) in said shed (6) of said warp yarns (5); characterized in that the method further comprises the step of stopping the jetting of given auxiliary picking nozzles (9) on the arriving side of said weft yarn (1) in the process of inserting said weft yarn (1) in a loop so that said weft yarn (1) does not get out of said shed (6) of said warp yarn (5) more than necessary. A mispicked weft removing method comprising the steps of: inserting a weft yarn (1), which is inside a main picking nozzle (4), and which further is continuous to a mispicked weft yarn (1a), into the shed (6) of warp yarns (5) in a loop by the jetting of said main picking nozzle (4) and auxiliary picking nozzles (9) when mispicking occurs; and pulling said weft yarn (1) from the picking side after locating a retaining member (9, 20) in said loop of said weft yarn (1) in said shed (6) of said warp yarns (5); characterized in that the method further comprises the step of providing a shield plate (34) on the arriving side of the travelling path of said weft yarn (1) in the process of inserting said weft yarn (1) in a loop at the fell of the cloth (12) so that said weft yarn (1) does not get out of said shed (6) of said warp yarns (5) more than necessary. A mispicked weft removing method comprising the steps of: inserting a weft yarn (1), which is inside a main picking nozzle (4), and which further is continuous to a mispicked weft yarn (1a), into the shed (6) of warp yarns (5) in a loop by the jetting of said main picking nozzle (4) and auxiliary picking nozzles (9) when mispicking occurs; and pulling said weft yarn (1) from the picking side after locating a retaining member (9, 20) in said loop of said weft yarn (1) in said shed (6) of said warp yarns (5); characterized in that the method further comprises the step of inserting a stop pin (36) into said shed (6) of said warp yarns (5) in order to restrain amount of peeling off of the mispicked weft yarn (1) from the fell of the cloth (12) so that said weft yarn (1) does not get out of said shed (6) of said warp yarns (5) more than necessary. A mispicked weft yarn removing method comprising the steps of: inserting a weft yarn (1), which is inside a main picking nozzle (4), and which further is continuous to a mispicked weft yarn (1a), into the shed (6) of warp yarns (5) in a loop by the jetting of said main picking nozzle (4) and auxiliary picking nozzles (9) when mispicking occurs; characterized in that the method further comprises the steps of stopping the jetting of said auxiliary picking nozzles (9) thereafter so as to let said looped weft yarn (1) drop by gravity so that an auxiliary picking nozzle (9) will be located in said looped weft yarn (1); and removing said mispicked weft yarn (1a) from the arriving side thereof by pulling said weft yarn (1) from the picking side as said weft yarn (1) continuous thereto is folded back by way of said auxiliary picking nozzle (9).

Inventors: AZUMA SATOSHI, SAWADA SHIGEHARU, TOBE YOSHINOBU, AZUMA, SATOSHI, SAWADA, SHIGEHARU, TOBE, YOSHINOBU
Applicants: TSUDAKOMA IND CO LTD, TSUDAKOMA KOGYO KABUSHIKI KAISHA
Application year: 1993
Main classification: D03D51
IPC codes: D03D51