• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    One method of removing a weft yarn which has been improperly crisscrossed in an air-jet type loom includes shutting down the air-jet type loom as soon as one is turned off. detects a weft thread insertion failure, cutting the weft thread that has been improperly crisscrossed using a blade, and stopping the insertion of a weft thread that follows the weft thread that was improperly crisscrossed, after it was cut, by closing a main valve and a secondary valve; releasing the weft yarn which has been improperly crisscrossed, after it has been cut, from coming into contact between upper warp threads and lower warp threads; placing a pick nip line of a fabric on or above the upper end of a secondary nozzle; separating the weft thread which has been improperly crisscrossed, after cutting it, from the pick clamp line by moving the secondary nozzle backwards; opening a shed by moving the lower warp threads and the upper warp threads; and removing improperly crisscrossed weft yarn from the shed, after it has been cut, by ejecting compressed air from the secondary nozzle through the opening of the secondary nozzle.
    公开号:BE1023294B1
    申请号:E2015/0229
    申请日:2015-09-08
    公开日:2017-01-25
    发明作者:Shinji Takagi
    申请人:Kabushiki Kaisha Toyota Jidoshokki；
    IPC主号:
    专利说明:

    METHOD FOR REMOVING A FRAME WIRE WHICH WAS INCORRECTLY INTERCONNECTED IN A TYPE A WEAVING
    AIR JET
    BASIS OF THE INVENTION
    The present invention relates to a method for removing a weft yarn which has been incorrectly crisscrossed in an air jet loom when a weft insertion failure has occurred in the loom of the type jet.
    As disclosed, for example, in Unexamined Japanese Patent Application Publication No. 10-266046, various devices are known for removing a weft yarn which has been incorrectly crisscrossed in an air jet type loom. . According to the device of the aforementioned publication, for removing a weft yarn which has been incorrectly crisscrossed, there is provided a nozzle which prevents the insertion of the weft yarn on a flapper which is arranged directly below a main nozzle intended for inserting the weft yarn and disposing a guide duct of the weft yarn directly above the main nozzle so that the weft guide duct faces the nozzle which prevents insertion of yarn from the yarn frame. A weft sensor which also serves as a guide for the air and a suction pipe are arranged on the side corresponding to the outlet opening of the guide duct of the weft yarn. The outlet of the suction pipe is oriented towards a dust collection box. A weft yarn removal motor is disposed behind the area in which the leaf is capable of oscillating and a pneumatic cylinder is disposed above the weft yarn removal motor.
    A drive roller is connected to the weft thread removal motor and a driven roller is connected to a drive shaft of a pneumatic cylinder which is provided above the weft removal motor. The driven roller is movable to press-contact with the drive roller when the pneumatic cylinder protrudes. When weft insertion failure occurs, we do not perform a cut-off removal of a weft yarn that has been incorrectly crisscrossed on the side of the main weft yarn nozzle and the weft yarn which following the weft yarn which has been incorrectly crisscrossed, i.e. the next weft yarn, is ejected via the weft insertion nozzle at a normal insertion rate of the weft yarn. The next weft yarn is blown by air ejected from the nozzle which prevents insertion of the weft yarn into the weft guide duct and into the suction pipe. The following weft thread is held in the suction pipe by the flow of the suction air.
    The next weft yarn is cut at a location adjacent to the main weft threading nozzle and then the flapper is reversed to return to its rearmost position so that the warp threads move. to their lower and upper limit positions to form a maximum warp shed and the weft yarn which has been incorrectly crisscrossed is no longer held by the warp yarns. The area extending between the weft guide duct and the suction pipe is overlapped by the area in which the drive roller and the driven roller are held. When the driven roller is brought into press contact with the drive roller and is driven, the following weft yarn is sucked from the side where the suction pipe is located. Such a subsequent weft removal operation removes the previously incorrectly crisscrossed weft yarn which is connected to the next weft yarn from the shed of warp yarns. When the weft sensor detects the end of the step of removing a weft yarn that has been incorrectly crisscrossed, the driven roller separates from the pickup roller and the weaving operation of the press type weaving loom. air jet resumes.
    The air jet type loom of the aforementioned publication of Unexamined Japanese Patent Application No. 10-266046 requires an additional device which is specifically designed for removal of the weft yarn which has been improperly interwoven, as well as devices necessary for the weaving operation of the loom of the air jet type. The functional components of the weft removal device which has been incorrectly crisscrossed, such as the nozzle which prevents the insertion of the weft thread, the guide duct of the weft thread, the suction pipe, the roll the weft removal motor, the driven roller and the pneumatic cylinder shall be arranged close to the main weft insertion nozzle which is a major component of the weft insertion device . The arrangement of said functional components around the main weft insertion nozzle complicates the structure of the weft insertion device itself and consequently the maintenance work, such as the adjustment of the main nozzle of the weft insertion device. insertion of the weft thread can be complicated.
    In the jet loom of the air jet type, which has been described above, in which the weft removal operation is carried out which has been incorrectly crisscrossed by the rotation of the drive roller and of the driven roller, the driving roller and the driven roller must be rotated at low speed in order to be able to remove the weft yarn which has been incorrectly crisscrossed in a successful manner without breaking it. Therefore, an extended period of time is required for the weft removal operation that has been incorrectly crisscrossed. Since the air jet type loom is shut down when the procedure for removing the improperly crisscrossed weft yarn is performed, the time period corresponding to the withdrawal of the air jet type loom is stopped. a weft yarn that has been incorrectly crisscrossed may affect the operational performance of the jet loom. In particular, in the case of weaving a fabric of large width, the operation of removing a weft yarn which has been incorrectly crisscrossed extends over an extended period of time, since The drive and the driven roller must be rotated at low speed.
    The present invention relates to a method for removing a weft yarn which has been incorrectly crisscrossed in a rapid manner when a weft insert insertion failure has occurred in an air jet type loom without the need to provide any additional device for removing a weft yarn that has been incorrectly crisscrossed.
    SUMMARY OF THE INVENTION
    In accordance with one aspect of the present invention, there is provided a method for removing a weft yarn which has been incorrectly crisscrossed in an air jet type loom including a weft insertion nozzle to insert a Weft yarn through a crowd formed by upper warp yarns and lower warp yarns to weave a fabric, a main valve which is connected to the weft yarn insertion nozzle, a secondary nozzle to provide support to inserting the weft yarn through the shed, a secondary valve that is connected to the secondary nozzle, and a blade to cut the inserted weft yarn. In the method for removing a weft yarn that has been incorrectly crisscrossed, once the weft yarn that has been incorrectly crisscrossed causes a weft insertion error and has been cut by the blade, the weft yarn which was incorrectly crisscrossed is removed from the crowd after his break. The method for removing a weft yarn that has been incorrectly crisscrossed in an air jet type loom includes stopping the air jet type loom as soon as one detects a weft insert insertion failure, stopping the operation of the air jet type loom, cutting the weft yarn that has been incorrectly crisscrossed using the blade and stopping inserting a weft yarn that follows the weft yarn that has been incorrectly crisscrossed, after cutting, by closing the main valve and the secondary valve; after stopping the operation of the air jet type loom, releasing the weft yarn which has been incorrectly crisscrossed after being cut from its contact between the yarns of upper chain and lower warp yarns by raising and lowering the upper warp yarns and the lower warp yarns in a direction corresponding to the rotation of the air jet type weaving loom in the opposite direction; placing a draw line of the fabric on or above the upper end of the secondary nozzle by moving the upper warp yarns, the lower warp yarns and the fabric backward in the air jet type loom and also moving the upper warp yarns and the lower warp yarns down; separating the weft yarn that has been incorrectly crisscrossed, after cutting, from the fabric draw line through the upper end by moving the secondary nozzle rearwardly; opening the shed by moving the lower warp threads to a location corresponding to the injection hole of the secondary nozzle and moving the upper warp threads to a location which is located above the place corresponding to the lower warp threads that have been moved; and removing the weft yarn which has been incorrectly crisscrossed, after cutting, from the shedding of the upper warp yarns and the lower warp yarns by ejecting compressed air from the secondary nozzle via the opening of the secondary valve. Other aspects and advantages of the invention will become apparent from the following description when taken in conjunction with the accompanying drawings which illustrate by way of example the principles of the invention.
    BRIEF DESCRIPTION OF THE DRAWINGS
    FIG. 1 is a plan view showing schematically an air jet type loom in which a method is used to remove the weft yarn which has been incorrectly crisscrossed according to a first form. embodiment of the present invention; FIG. 2 is a cross-sectional side view of a weft insertion device of the air jet type loom of FIG. 1, showing a state in which the upper warp yarns the lower warp threads and the fabric are moved backwards; Fig. 3 is a cross-sectional side view showing a state in which the upper warp yarns and the lower warp yarns are moved downward; Fig. 4 is a partially enlarged fragmentary sectional view of the area A encircled by a dotted line in Fig. 3; Fig. 5 is a cross-sectional side view showing a state in which a secondary nozzle of the weft insertion device is moved backward; Fig. 6 is a cross-sectional side view of the weft insertion device, in which the lower warp threads are moved to a location corresponding to an injection hole of the secondary nozzle; Fig. 7 is a fragmentary plan view showing a portion of the weft insertion device of Fig. 6; Fig. 8 is a cross-sectional side view of the weft insertion device showing the removal of a weft yarn which has been incorrectly crisscrossed; Fig. 9 is a cross-sectional side view of the weft insertion device, in which there is shown a state in which the upper warp threads, the lower warp threads and the cloth are moved forward; and Fig. 10 is an enlarged cross-sectional view showing the weft yarn detecting device which has been incorrectly crisscrossed in an air jet type loom, in which a method for removing the weft yarn which has been incorrectly crisscrossed in accordance with a second embodiment of the present invention.
    DETAILED DESCRIPTION OF THE EMBODIMENTS
    A first embodiment of a method for removing a weft yarn that has been incorrectly crisscrossed in an air jet type loom according to the present invention will now be described with reference to FIGS. 1-9, beginning with by the description of the air jet type loom which is generally indicated by the reference numeral 1 in FIG. 1. It should be pointed out that in the description which follows, the side corresponding to the recovery a fabric W (i.e. the underside of Figure 1) corresponds to the front, and the side corresponding to the unwinding of the warp threads (the upper side of Figure 1) corresponds to the rear of the loom of the air jet type 1, respectively. Referring to FIG. 1, the air jet type loom 1 includes a drive motor 2 of the loom and a leaf 3 is driven by the drive motor 2 of the loom to oscillating forwards and backwards in the air jet type loom 1. A weft insertion nozzle 5, a plurality of secondary nozzles 6 and a plurality of rosemouth teeth 8 which form a guide passage 7 through which a weft thread Y passes, are mounted on the leaf 3. The weft insertion nozzle 5, the secondary nozzles 6 and the teeth of the ros 8 form a thread insertion device Weft 4
    The weft insertion nozzle 5 is connected to a source of compressed air 12 via a pipe 9, a main valve 10 and a main tank for the air 11. Each secondary nozzle 6 is connected to its associated secondary valve. 14 via a pipe 13 and also to a secondary tank for the air 16 and to the source of compressed air 12 via a pipe 15. A device for measuring and storing the weft yarn 17 is disposed at a location upstream from the weft insertion nozzle 5 (to the left of the nozzle 5 in FIG. 1). The device for measuring and storing the weft thread 17 measures the predetermined length of weft yarn Y which is required for weft thread insertion and conveys the measured weft yarn to the weft inserting nozzle. 5. The upper warp threads T1 and the lower warp threads T2 are unwound via a warp thread unwinder 19 having a unwind motor 18 and are lifted and lowered alternately to form a shed via an electronic device 22. method of forming a crowd including a plurality of heald frames 20 and a plurality of shedding motors 21 which are connected to the respective heald frames 20.
    A weft yarn Y is inserted through the weft insertion nozzle 5 in a shedding formed by the upper warp threads T1 and the lower warp threads T2 and is assisted in its flight through the shed by the nozzles. Secondary 6. The weft thread that has been inserted in a successful manner is beaten by a comb or a ros that is able to oscillate with the wing 3 to form the fabric W, and is then cut by using a blade 23 which is disposed at a location adjacent to the weft insertion nozzle 5. The fabric W is recovered by a fabric winding device 25 having a winding motor 24 A selvedge (not shown) for holding the leading end of the inserted weft yarn Y is formed on the downstream side of the weft insertion nozzle 5 outside the edge of the fabric W. A feeler 26 or an end detector is disposed at a location between the edge and the edge of the fabric W. The inserted weft yarn Y which is held by the selvedge is cut using an end blade 27 which is provided between the fabric W and the selvedge , and the resultant fabric W is recovered by the fabric winding device 25.
    A discharge duct 28 is provided on an extension of the guide passage 7 formed by the teeth of the ros 8 so as to completely cover the area of the end of the guide passage 7 on the output side. When a weft insert insertion failure is detected by the end probe 26, a weft yarn which has been incorrectly crisscrossed Y1 (as can be seen in FIG. 2) is removed, as will be described later. in a more detailed way. Specifically, the weft yarn which has been incorrectly crisscrossed Y1, after having been evacuated from the guide passage 7, is removed while being guided by the exhaust duct 28 to a dust collection box (not shown). provided in the loom of the air jet type 1.
    The loom of the air jet type 1 includes a control device 29 which is connected to the driving motor 2 of the loom, to the main valve 10, to the secondary valves 14, to the device for measuring and to storing the weft yarn 17, the unwinding motor 18, the shedding motors 21 and the winding motor 24 via signal lines 30 to 36, respectively. The control device 29 is also connected to an encoder 38 which is connected to the driving motor 2 of the loom via the signal line 37. The control device 29 determines an angular position of the loom 1 of the jet type. of air based on the detection signals that are sent by the encoder 38 and controls the driving motor 2 of the loom, the main valve 10, the secondary valves 14, the measuring and storage device of the loom. weft yarn 17, the unwinding motor 18, the shedding motors 21 and the winding motor 24 based on the determined angular position of the air jet type loom 1. The controller 29 is also connected to the end probe 26 via a signal line 39 to make a determination as to whether the insertion of the weft yarn was successful or not. shows a failure. For this purpose, the control device 29 stores a weaving control program and sends signals to each of the devices and elements of the weaving loom 1 of the air jet type connected thereto, depending from the program.
    The control device 29 is designed to drive the unwinding motor 18, the shedding motors 21 and the winding motor 24 individually, while the drive motor 2 of the weaving loom is at the same time. stop. In particular, in the case of an electronic crowd-forming device 22 in which each of the shed-forming motors 21 is connected to its corresponding stringer frame 20 which raises and lowers the upper warp yarns and the warp yarns. In order to form a crowd, the shedding motors 21 may be individually driven to control the heald frames 20 individually and appropriately, in a corresponding manner.
    A method for removing a weft yarn which has been incorrectly crisscrossed Y1 when a weft insert insertion failure has occurred in the air jet type loom 1 shown in FIG. now described with reference to FIGS. 2 to 9. During the weaving operation of air jet type loom 1, when an inserted weft yarn Y fails to reach a specified normal position, the end probe 26 sends to the controller 29 a signal indicating that a weft yarn Y has not arrived at the normal position and the controller 29 determines the presence of a yarn insertion failure. frame.
    The controller 29 stores a program for the removal of an incorrectly crisscrossed weft yarn, which is implemented in the case of weft insertion insertion failure, and sends a stop signal to driving motor 2 of the loom, the unwinding motor 18, the shedding motors 21 and the winding motor 24 depending on the weft removal program. The controller 29 also sends an off-function signal to the device for measuring and storing the weft thread 17, the main valve 10 and the secondary valves 14. Since a delay time exists between the moment when the driving motor 2 of the loom, the unwinding motor 18, the shedding motors 21 and the winding motor 24 receive a stop signal and the moment corresponding to their real stop, for a moment, a shed is formed by the upper warp threads T1 and the lower warp threads T2, and a next weft yarn Y following the weft yarn which has been incorrectly crisscrossed Y1 can be ejected from the die nozzle. insertion of weft yarn 5 before the jet loom 1 of the air jet type stops. However, in response to the control signal from the controller 29, no amount of compressed air is ejected by the weft insertion nozzle 5 and the secondary nozzles 6 as long as the operation of the loom weave 1 of the air jet type is stopped, so that the insertion of a weft thread following Y is prevented. The weft yarn which has been incorrectly crisscrossed is cut by the blade 23 which is provided adjacent to the weft insertion nozzle 5 while the operation of the jet loom 1 of the air jet type is shutdown.
    After stopping the air jet loom 1, the controller 29 sends a rotation command in the opposite direction to the respective crowd forming engines 21 of the crowd forming electronic device 22. As a result, the shedding motors 21 are rotated in the opposite direction in a manner which essentially corresponds to a complete rotation of the drive motor 2 of the loom so as to move the heald frames. 20 to form a shedding between the upper warp threads T1 and the lower warp threads T2, and the weft thread that has been incorrectly crisscrossed is removed from being brought into contact with the upper warp threads Tl and the warp threads. lower chain T2. Then, the control device 29 drives the unwinding motor 18 and the winding motor 24 so as to move the upper warp threads Tl, the lower warp threads T2 and the cloth W backwards or in the direction indicated by the arrow in FIG. 2. The fabric W moves backwardly on a forming plate 40 to a position where a WF draw line of the fabric W is disposed above the upper end 6A of the respective secondary nozzles 6.
    When the WF picking line of the fabric W has moved to the position above the upper end 6A of the secondary nozzles 6, the backward movement operation is terminated. Then, the controller 29 sends a drive instruction to the crowd forming electronic device 22 to drive the shedding motors 21. Specifically, the shedding motors 21 connected to the heald frames 20 for the lower warp yarns T2 are driven to move the lower warp yarns T2 downward, as can be seen by the indicated direction. by the arrow shown in Figure 3 and the shedding motors 21 which are connected to the heald frames 20 for the upper warp threads Tl are driven to move the warp threads Tl downward, as shown in FIG. can see it in the same direction indicated by the arrow shown in Figure 3. As a result, the fabric W is pressed against the upper ends 6A of the secondary nozzles 6, as can be seen in Figure 3. The first In this embodiment, the upper ends 6a of the secondary nozzles 6 are compressed against the weft yarn Y which is inserted directly before the weft yarn Y1 which has been incorrectly crisscrossed, as can be seen in FIG. 3. However, the backward travel distance traveled by the fabric W can be appropriately modified so that the upper ends 6A of the secondary nozzles 6 are compressed against the weft yarn Y1 which was incorrectly crisscrossed or against yarn Y that was inserted before weft yarn Y that was inserted directly before yarn Y1 that was incorrectly crisscrossed.
    Then, the controller 29 sends a rotation instruction in the opposite direction to the drive motors 2 of the loom. The driving motor 2 of the loom is rotated in the opposite direction and the leaf 3 is subjected to a corresponding backward oscillation. As shown in FIG. 4, the secondary nozzles 6 follow an upwardly and rearwardly arcuate movement in conjunction with the backward swinging movement of the wing 3. The secondary nozzles 6 which are then compressed against the fabric W at the upper ends 6A of said nozzles is obliquely upwardly (towards the secondary nozzle 6 which is illustrated by an imaginary line in FIG. 4) while sliding along the lower surface of the W. Although such movement of the upper ends 6A of the secondary nozzles 6 in sliding contact with the fabric W act on the weft yarns Y to impress them backwardly, the weft yarns Y which are held firmly by the upper warp threads T1 and by the lower warp threads T2 will not separate from the cloth W.
    On the other hand, the weft yarn Y1 which has been incorrectly crisscrossed is released from its contact between the upper warp threads T 1 and the lower warp threads T2 and consequently will slightly upset the Y warp threads which are already woven into the fabric W. Thus, the weft yarn Y1 which has been incorrectly crisscrossed is separated from the picking line WF easily via the sliding movement of the upper ends 6A of the secondary nozzles 6 and a gap Free is created between the Y1 weft yarn which was incorrectly crisscrossed and its most adjacent weft yarn Y which was inserted directly before the yarn Y1 which was incorrectly crisscrossed. As the secondary nozzles 6 move, the upper ends 6A of the secondary nozzles 6 further separate the weft yarn Y1 which has been incorrectly crisscrossed from the weft yarn Y and enter the space in question. When the secondary nozzles 6 have moved to their most rearward location, the weft yarn which has been incorrectly crisscrossed Y1 is pushed back by the dorsal surface of the respective secondary nozzles 6 and is completely separated. of the WF picking line of the fabric W. Then, the weft yarn Y1 which has been incorrectly crisscrossed is no longer stretched between the secondary nozzles 6 and has a zigzag-shaped configuration, as can be seen in Figure 7.
    When the weft yarn Y1 which has been incorrectly crisscrossed is completely separated, the controller 29 sends a drive instruction to the crowd forming electronic device 22. As a result, the crowd forming engines 21 which are connected to the heald frames 20 for the lower warp yarns T2 are driven to move the lower warp yarns T2 upward to a location corresponding to the injection holes 6B of the secondary nozzles 6, as can be seen in FIG. Since the weft yarn which was incorrectly crisscrossed Y 1 which is separated from the WF pick line of the fabric W is placed on the lower warp yarns T2, the weft yarn which has been incorrectly crisscrossed Y1 is guided to the location corresponding to the injection holes 6B of the secondary nozzles 6 by the upward movement of the lower warp threads T2. The shedding motors 21 which are connected to the heald frames 20 for the upper warp threads Tl move the upper warp threads T1 to a location which is located above the lower warp threads T2 and forming a shed between the upper warp threads T1 and the lower warp threads T2. The weft yarn which has been incorrectly crisscrossed Y1 and which has been placed on the lower warp threads T2 is arranged in front of the guide passage 7 of the teeth of the ros 8, the tips of the zigzag configuration formed by the weft yarn Y1 facing the injection holes 6B of the secondary nozzles 6, as shown in FIGS. 6 and 7.
    Once the weft yarn which has been incorrectly crisscrossed Y1 has come to be placed in front of the guide passage 7, facing the injection holes 6B of the secondary nozzles 6, as shown in FIG. control device 29 sends an opening instruction to all the secondary valves 14 of the secondary nozzles 6. As a result, the secondary valves 14 open and compressed air is ejected at the same time from the injection holes 6B 2. As shown in FIG. 8, the weft yarn in its entirety Y1 which has been incorrectly crisscrossed, oriented towards the injection holes 6B, is blown by the compressed air ejected by the injection holes. 6B into the guideway 7 of the teeth of the rose 8. The weft yarn which has been incorrectly crisscrossed Y1, which is blown into the guide passage 7 by the compressed air ejected by the secondary nozzles 6, is removed from the 'extrémit of the crowd on the opposite side to that occupied by the weft insertion nozzle 5. The weft yarn which has been incorrectly crisscrossed Y 1, which is evacuated from the crowd formed by the upper warp threads Tl and by the lower chain wires T2 spring exhaust duct 28 and is collected in the dust collector box.
    At the end of the removal of the weft yarn Y1 which has been incorrectly crisscrossed, the controller 29 sends a normal rotation control command to the warp wire feed device 19 and to the winding device of the fabric 25. Accordingly, the fabric W, the upper warp threads T1 and the lower warp threads T2 are moved forward so that the WF pick line of the cloth W returns to its normal position, as it is FIG. 9. At the same time, the control device 29 sends a training instruction to the electronic crowd-forming device 22. As a result, the drive motors 21 of the crowd-forming electronic device 22 cause the heald frames 20 for the upper warp threads T1 and for the lower warp threads T2. Specifically, the upper warp threads T1 and the lower warp threads T2 move to their upper and lower limit positions, respectively, to form a maximum warp shed.
    When the picking line WF has returned to its initial position and when the upper warp threads T1 and the lower warp threads T2 have moved to their upper and lower limit positions, respectively, the weaving loom 1 of Air jet is ready for commissioning. Then, the control device 29 instructs the loom 1 of the air jet type to restart and the weaving operation of the loom 1 of the air jet type resumes. The operations shown in FIGS. 2 to 9, which are carried out after the detection of a weft insertion failure and the restart of the air jet type loom 1, are carried out according to the programs that are installed in the controller 29. However, an operator can give the restart instruction to the loom 1 of the air jet type by pressing a start button (not shown) after removing the weft thread that has been incorrectly crisscrossed Y1.
    In the air jet type loom 1 according to the first embodiment, the secondary nozzles 6 which are part of the weft insertion device 4 of the air jet type loom 1 separate a weft yarn which has been incorrectly crisscrossed Y1 of the WF pick line of the fabric W in a successful manner. In addition, the secondary nozzles 6 evacuate and remove the separated weft yarn Y1 which has been incorrectly crisscrossed from the shed formed between the upper warp threads T1 and the lower warp threads T2 in a successful manner. The upper warp threads T1 and the lower warp threads T2 are driven by the heald frames 20 which are connected to their corresponding shedding motors 21 of the crowd-forming electronic device 22, which makes it possible to adjust without difficulty the direction and travel distance of the upper warp threads T1 and the lower warp threads T2. Further, after removal of the incorrectly crisscrossed weft yarn Y1, the WF pick tightening line automatically returns to its initial position and the upper warp threads Tl and the lower warp threads T2 also automatically return to their original position. initial positions, respectively, and the loom 1 of the air jet type is ready to resume the weaving operation. In other words, the method for removing a weft yarn Y1 which has been incorrectly crisscrossed is carried out sequentially until commissioning of the air jet type loom resumes.
    The present invention is not limited to the configurations that have been described in the above-mentioned embodiment and can be varied in various ways and implemented in a variety of ways while remaining within the scope of the invention. (1) The operation of moving only the upper warp threads T1, the lower warp threads T2 and the cloth W backwards (as shown in Fig. 2) and the operation of moving the warp threads upper Tl and downstream lower chain wires T2 (as shown in Figure 3) can be implemented in the reverse order or simultaneously. (2) The device for moving the upper warp threads T1 and the lower warp threads T2 is not limited to the electronic crowd-forming device 22 and it is possible to use a dobby or a Jacquard mechanism equipped with a mechanism which controls the movement of the warp threads using motors which are provided independently of the drive motor 2 of the loom. (3) In accordance with the first embodiment, the ejection of compressed air for discharging a weft yarn Y1 which has been incorrectly crisscrossed is carried out simultaneously by all the secondary nozzles 6. However, in accordance with the present invention, The configuration may also be such that compressed air is ejected in a manner relayed by all the secondary nozzles 6 or otherwise by a plurality of selected secondary nozzles 6. (4) The upper end of the secondary nozzles 6 may be needle-shaped in such a manner that the ends of the secondary nozzles 6 can easily penetrate the gap between the improperly interwoven weft yarn Y1 and the weft yarn which has been inserted. directly before the Y1 weft yarn which has been incorrectly crisscrossed. (5) Referring to Fig. 10, a second embodiment of the present invention will now be described. Reference numeral 41 denotes an improperly crisscrossed weft feeder which is disposed at a location between any two adjacent second nozzles 6 to detect a weft yarn Y1 that has been incorrectly crisscrossed. Alternatively, the configuration may be such that a number of the secondary nozzles 6 are replaced by the probe 41 of a weft thread which has been incorrectly crisscrossed, to play the same role.
    The improperly crisscrossed yarn probe 41 includes a cylindrical body 42 having substantially the same configuration as the secondary nozzles 6 and an aperture 43 formed at a location adjacent to the upper end of the cylindrical body 42. projection and receiving light 44 of a photoelectric sensor provided with a reflector is provided within the cylindrical body 42 so as to emit and receive light through the opening 43. The opening 43 is formed essentially at same place or level as the injection holes 6B of the secondary nozzles 6. When the weft yarn which has been incorrectly crisscrossed Y1 which has been separated from the WF pick line of the fabric W is subjected to movement by the lower chain son T2 to take the position corresponding to the injection holes 6B of the secondary nozzles 6, a beam of light BL is emitted by the light projection and reception device 44 on the weft yarn which has been incorrectly crisscrossed Y1, before being reflected by the weft yarn which has been incorrectly crisscrossed Y1. Reflected light, as indicated by RL, is received by the light sensor of the light projection and reception device 44.
    The light producing and receiving device 44 sends a light receiving signal to the controller 29. Thereafter, the controller 29 detects the incorrectly criss-crossed weft yarn Y1 and determines that the yarn The weft that has been incorrectly crisscrossed Y1 is separated from the WF pick line in a successful manner and moves on to the next step. In the absence of a weft yarn which has been incorrectly crisscrossed Y1, no light reception signal is sent by the light projection and reception device 44. Next, the control device 29 determines the fact that that the separation of the weft yarn which has been incorrectly crisscrossed Yl has not occurred and stops the process for the removal of the weft yarn which has been incorrectly crisscrossed Yl and at the same time triggers an alarm signal, for example.
    According to the second embodiment shown in FIG. 10, which includes an additional step of determining the presence or absence of the weft yarn which has been incorrectly crisscrossed Y1, the resumption of the weaving operation of the air jet type loom 1, while the weft yarn which has been incorrectly crisscrossed Y1 has not been removed, is prevented. The moment corresponding to the detection of the weft yarn which has been incorrectly crisscrossed Y 1 can be set between the moment corresponding to the implementation of the separation of the weft yarn which has been incorrectly crisscrossed Y 1 from the WF pick line and the moment corresponding to the evacuation of the weft yarn which has been incorrectly crisscrossed Y1 from the crowd of the upper warp threads T1 and the lower warp threads T2. A failure to remove the improperly crisscrossed weft yarn is detected at an early point in time and hence the manufacture of a defective fabric in which the weft yarn which has been incorrectly crisscrossed can be prevented. (6) The upper ends 6A of the secondary nozzles 6 are compressed against the fabric W as shown in FIG. 3. However, according to the present invention, a space can be provided between the upper ends 6A of the secondary nozzles 6 and the fabric W as long as the upper ends 6A of the secondary nozzles 6 which are moving backwards can come into contact with the weft yarn which has been incorrectly crisscrossed Y1.
    权利要求:
    Claims (3)
    [1]
    A method for removing a weft yarn which has been incorrectly crisscrossed (YI) in an air jet type loom (1) including a weft insertion nozzle (5) for inserting a yarn weft (Y) through a shed formed by upper warp yarns (Tl) and lower warp yarns (T2) to weave a fabric (W), a main valve (10) which is connected to the nozzle of inserting weft yarn (5), a secondary nozzle (6) to support the insertion of the weft yarn (Y) through the shed, a secondary valve (14) which is connected to the secondary nozzle (6). ), and a blade (23) for cutting the inserted weft yarn (Y), the method in which, after the weft yarn which has been incorrectly crisscrossed (Y1) causes a weft insert insertion failure, and cut by the blade (23), the weft yarn which has been incorrectly crisscrossed (Y1) is removed from the shed, after being cut, being characterized in that it comprises: stopping the operation of the air jet type loom (1) upon detecting the insertion failure of the weft yarn; stopping the operation of the jet loom (1); cutting the weft yarn which has been incorrectly crisscrossed (YI) using the blade (23) and stopping the insertion of a weft yarn (Y) following the weft yarn which has been incorrectly crisscrossed ( Yl) after shutting off, closing the main valve (10) and the secondary valve (14); after stopping the operation of the air jet type loom (1), releasing the weft yarn which has been incorrectly crisscrossed (Y1), after cutting, from its contact between the upper warp (Tl) and the lower warp (T2) yarns by raising and lowering the upper warp threads (Tl) and the lower warp threads (T2) in a direction corresponding to the inverted rotation of the warp air jet type weaving machine (1); placing a draw line (WF) of the fabric (W) on or above the upper end (6A) of the secondary nozzle (6) by moving the upper warp threads (Tl), the threads lower chain (T2) and the fabric (W) backwards in the air jet type loom (1) and also by moving the upper warp threads (Tl) and the lower warp threads (T2) down; separating the weft yarn which has been incorrectly crisscrossed (Y1), after cutting, from the picking line (WF) via the upper end (6A) by moving the secondary nozzle (6) rearwardly; open the crowd by moving the lower warp threads (T2) to a position corresponding to an injection hole (6B) of the secondary nozzle (6) and also by moving the upper warp threads (Tl) into a position which is located above the position corresponding to the lower (T2) warp threads moved; and removing the weft yarn which has been incorrectly crisscrossed (Y1), after being cut, from the crowd by ejecting compressed air from the secondary nozzle (6) via the opening of the secondary valve (14).
    [2]
    Method for removing a weft yarn which has been incorrectly crisscrossed (Y1) in the air jet type loom (1) according to claim 1, characterized in that the upper warp yarns (Tl) and the lower warp threads (T2) are raised and lowered alternately to form the shed via an electronic crowd-forming device (22) including a plurality of heald frames (20) and a plurality of shed-forming engines (21) which are connected to the respective heald frames (20).
    [3]
    Method for removing a weft yarn which has been incorrectly crisscrossed (Y1) in the air jet type loom (1) according to claim 1 or 2, characterized in that the loom of the type in the air jet (1) further includes a weft probe which has been incorrectly crisscrossed (41); and the weft yarn which has been incorrectly crisscrossed (W1) and which is separated after cutting from the picking line (WF) is detected by the weft yarn probe which has been incorrectly crisscrossed (41) before removing from the crowd the weft thread that has been incorrectly crisscrossed (W1) after it has been cut.
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    同族专利:
    公开号 | 公开日
    JP2016056471A|2016-04-21|
    CN105401311A|2016-03-16|
    BE1023294A1|2017-01-25|
    CN105401311B|2017-05-03|
    JP6028773B2|2016-11-16|
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    JP3241235B2|1995-05-01|2001-12-25|株式会社ヒメノ|Drilling method and drilling equipment|
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    JP2008285783A|2007-05-18|2008-11-27|Toyota Industries Corp|Method for detecting abnormal warp tension in loom|JP6384453B2|2015-11-03|2018-09-05|株式会社豊田自動織機|Weft detection method in air jet loom|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2014183031A|JP6028773B2|2014-09-09|2014-09-09|Weft processing method in air jet loom|
    JPJP2014-183031|2014-09-09|
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