JP5046419B2 - Drive control method of weft end processing device in non-woven loom - Google Patents

Description

  The present invention relates to a drive control method for a weft end processing apparatus that applies a false twist to the end of the ear and grips the weft end.

  In non-woven looms, weft ends that have been inserted are gripped by crossing with warp warps to form the end of the weft and twisted by a false twisting device to strengthen the weft end gripping force. Techniques for preventing the weft ends after cutting of the wefts from falling off the throwing ears are known, and many patent documents are disclosed.

For example, the weft end false twisting device 24 of the weft end processing device disclosed in Patent Document 1 is composed of a false twisting spindle 32 and a false twisting plate 34 having a yarn introduction hole 40 attached to the end of the heel side, It is arrange | positioned at the side part opposite to the weft insertion side of the woven fabric. In the embodiment of FIG. 1 of Patent Document 1, a false twist spindle 32 is connected to a drive shaft 46 rotated by a driving motor of a plain loom via a spindle pulley 36, a belt 54 and a one-way pulley 50 integrated with a one-way clutch 48. Are connected. Further, in the embodiment of FIG. 5, the false twist spindle 32 is connected to another motor 82 independent of the driving shaft of the non-woven loom via a spindle pulley 36, a belt 54 and a pulley 84. In any of the embodiments, the false twisting spindle 32 is brought into a stopped state during reverse rotation of the loom so that the false twisting state of the scraping ear 22 is eliminated and the weft pieces 20 are prevented from falling off and scattering from the scraping ear 22. Configured to be placed. Further, it is described that the false twisting spindle 32 is rotated in the forward rotation direction even in the operation for placing the yarn introduction hole 40 of the false twisting plate 34 at a position where the threading 22 can be easily passed.
JP 2002-235262 A

  The twisted state of the false ear 22 that has been false twisted extends to the vicinity of the weave. In addition, since the weft held by the scraper is cut by the cutter 18 when the weft insertion is repeated a predetermined number of times, only the weft piece 20 is gripped by the subsequent scraper 22. Therefore, in Patent Document 1, when the plain loom is reversed, the weft portion on the fabric side is released. However, since the weft corresponding to the predetermined number of weft insertions from the pre-weaving position is in a state before being cut by the cutter 18, the weft end portion is in a state of being firmly held by the scraper 22.

  In a weaving loom, if a weft insertion error occurs or if a weaving flaw is discovered after weaving operation for a predetermined time and can be repaired on the weaving loom, weave the weaving machine while reversing the weaving loom. The work of pulling out each book is performed. When performing such a textile restoration work, if the scraper 22 is in a twisted state as in Patent Document 1, it is difficult to easily extract the weft end on the front side of the weave. If the fabric repair work is still performed by the operator, for example, the operator pulls the weft end forcibly away from the scraper 22, or if the operator does not separate the weft end 22, the weft removed from the fabric is wound around the scraper 22. However, the burden on the worker must be large. On the other hand, when mechanically repairing, such as an automatic repair device for misplaced weft yarns that has been standardized in the plain weaving machines in recent years, it is substantially impossible to remove the weft yarns held by the scraper 22 near the front of the weave. It becomes possible and makes automation difficult.

  It is an object of the present invention to prevent the cut pieces from falling off and flying off from the scraping ears when reversing the plain loom, and to easily remove the wefts before cutting.

The invention of claim 1 is characterized in that a false twisting device is formed by crossing a weft end of a weft thread and a plurality of warp warps, and a twisting device for twisting the scraper and a plurality of weft insertions In a weft end processing apparatus in a non- woven loom equipped with a cutter that cuts the weft end later, during the normal weaving operation of the non-woven loom, the false twisting device is driven by a dedicated motor synchronized with the operation of the non-woven loom When the reversing of the satin loom is performed after the satin loom is stopped , the dedicated motor is turned up to the number of weft insertions from the pre-weaving position when the satin loom stops to the weft position before cutting by the cutter. during the reversed in synchronism with the shuttleless loom, the excess of the weft insertion times is reversed shuttleless looms characterized in that it does not release the twisted in捨耳stop the dedicated motor.

  According to the present invention described in claim 1, the end of the weft thread before cutting by the cutter can be easily extracted from the scraping ears, and the weft cutting edge held by the scraping ears can be reliably prevented from falling off and scattering. it can.

  According to the present invention of claim 2, the number of weft insertions from the pre-weaving position to the weft position before cutting by the cutter is the number of reversals that can release the weft insertion miss yarn when the satin loom stops due to a weft insertion error Therefore, it is possible to easily extract the wefts that have been missed during weaving loom operation and to facilitate the automation of weft extraction.

  According to a third aspect of the present invention, the dedicated motor includes a rotor integrated with a false twist spindle of the false twisting device and a stator that houses the rotor, and a rotational speed command of the false twist spindle output from the control device. Since the motor is started and stopped by the command of the motor drive command means based on the operation command, the installation space for the dedicated motor can be minimized and the configuration can be simplified.

  The invention of the present application can easily remove the weft yarn before cutting by the cutter while maintaining the function of preventing the pieces from falling off and scattering from the scraping ears during reverse rotation of the loom.

(First embodiment)
Hereinafter, a first embodiment implemented in a weft end processing apparatus of a water jet loom will be described with reference to FIGS.
In FIG. 1, wefts 3 are piecewise inserted between a large number of ground warp yarns 2 passed through a reed 1 to form a woven fabric 4. A plurality of selvage warps 5 passed through the ridge 1 are arranged outside the edge of the woven fabric 4 on the side opposite to the weft insertion side (not shown). The wefting warp 5 crosses the weft 3 inserted, thereby grasping the weft end 3a to form the wetting ear 6 to prevent loosening of the weft tension. In this embodiment, the weft end 3a is cut by the cutter 7 disposed along the edge of the woven fabric 4 after the weft insertion three times, so that the cut piece 3b remains on the scraper 6. Therefore, in this embodiment, the number of weft insertions up to the weft position before cutting by the cutter 7 is three.

  On the other hand, a false twisting device 8 comprising a hollow motor 9 as a dedicated motor, a false twist spindle 10 and a false twisted plate 11 on a flat plate is disposed on the path of the scraper 6. The hollow motor 9 is composed of a stepping motor comprising a stator 12 also serving as a housing and a rotor 13 built in the stator 12, and the rotor 13 is fixed to a false twist spindle 10 that penetrates the stator 12 and is rotatably supported. Has been. Accordingly, when the power is turned on, the rotor 13 rotates forward and backward, whereby the false twist spindle 10 can perform forward rotation in the direction of the arrow and reverse rotation in the direction opposite to the arrow. The false twisted plate 11 has three discarding guide holes 14 formed of through holes, and is attached integrally to an end portion of the false twist spindle 10 that protrudes toward the flange 1 side. In addition, a lapping guide 15 is disposed between the false twist plate 11 and the flange 1. The discarding guide 15 has a through hole (not shown) through which the discarding ear 6 passes at the center thereof and a guide plate 15a for guiding the weft end 3a projected to the woven fabric 4 side to the through hole.

  The discarding ear 6 is guided by the discarding guide 15, passed through the discarding guide hole 14 in a zigzag shape, and then inserted into the false twisting spindle 10 from an insertion hole (not shown) penetrating the side surface of the false twisting spindle 10. Passed. Further, the scraper 6 pulled out from the end of the false twist spindle 10 opposite to the flange 1 is gripped by the scraper pullout roller 16 and sent to a dust box (not shown) by the rotation of the scraper pullout roller 16 in the arrow direction. Accordingly, when the hollow motor 9 is driven, the scraper 6 in the state of being held in the scraper guide hole 14 of the false twist plate 11 is twisted between the scraper guide 15 and the scraper pulling roller 16 and discarded. The gripping force of the weft end 3a and the cut piece 3b by the ear 6 is strengthened.

  Next, the control means of the hollow motor 9 will be described with reference to FIG. The control device 17 includes a rotation speed calculation unit 18, a rotation speed command unit 19, and an operation command unit 20. The rotational speed command means 19 outputs the rotational speed command value of the false twist spindle 10 corresponding to the weaving conditions such as the weaving speed and density or the type of weft to the rotational speed calculation means 18. As the rotational speed command value of the false twisting spindle 10, tension is applied to the weft 3 by twisting of the scraper 6, so that an adjusted rotational speed is commanded, for example, fast for thick yarn and slow for thin yarn. The operation command means 20 outputs operation command values such as normal rotation, reverse rotation and stop of the false twist spindle 10 and their timing to the rotation speed calculation means 18. The command values of the rotation speed command means 19 and the operation command means 20 are input from the input device 21 and set. The rotation speed calculation means 18 compares the command value output from the rotation speed command means 19 with the loom rotation angle signal input from the rotation angle detector 22 of the loom, and calculates the rotation speed of the false twist spindle 10. The rotation speed signal of the false twist spindle 10 calculated by the rotation speed calculation means 18 is output to the motor drive command means 23, and the hollow motor 9 is driven.

  A drive control method for the false twisting device 8 configured as described above will be described based on a flowchart showing an example of repairing a weft insertion error yarn in FIG. There are various known weft insertion thread repair methods, but in this embodiment, when a weft insertion error occurs, the next weft insertion is automatically blocked, and after weaving the loom stops, the weft is reversed twice. A description will be given of a method in which a mis-inserted yarn is released from the ground warp yarn and the weft-inserted yarn can be pulled out. In FIG. 3, for convenience, the water jet loom is represented by a generic expression of a non-woven loom.

  Simultaneously with the start of the loom, the motor drive command means 23 starts the hollow motor 9 based on the command from the rotation speed calculation means 18 and the false twist spindle 10 is rotated. If the occurrence of a weft insertion error is detected by a weft insertion error detection means (not shown) during the operation of the weaving loom, the weaving loom and the hollow motor 9 are stopped after the completion of the next weft insertion operation. In the weft insertion operation after the weft insertion error has occurred, the weft insertion is prevented as described above, so that the loom loom performs two reverse rotations continuously and stops. The hollow motor 9 performs two reverse rotations in synchronism with the loom based on a command from the rotation speed calculation means 18 and stops. Accordingly, the twisted ear 6 is released from the twisted state of two weft insertions by the false twisting spindle 10 in accordance with the opening in the reverse direction of the ground warp yarn 2. At this time, the weft misplaced yarn is in a state where it can be removed because both the weft 3 held by the ground warp 2 and the weft end 3a held by the discard warp 5 are completely opened. For this reason, a weft insertion error yarn repair automatic machine (not shown) can easily extract the released weft insertion error yarn. Furthermore, when the operator reverses more than the number of weft insertions to the weft position before cutting by the cutter 7 (three times in this embodiment), only the plain loom is reversed and the hollow motor 9 is stopped. Will remain. Accordingly, the portion of the scraper 6 that holds the cut piece 3b cut by the cutter 7 is not released from the twisted state, so that the cut piece 3b has no possibility of falling off the scraper 6. When the weft insertion miss yarn repair is completed, the hollow motor 9 is restarted together with the non-woven loom according to the command of the rotational speed calculation means 18, and a normal weaving operation is performed.

  In the first embodiment, in addition to the function and effect that the cut piece 3b can be prevented from falling off the scraper 6 and the weft held by the scraper can be completely opened, and the weft 3 can be easily pulled out. There is an effect that automation of missed yarn repair can be promoted. Moreover, since the hollow motor 9 which is a dedicated motor is integrated with the false twist spindle 10, the installation space for the dedicated motor can be minimized and the configuration can be simplified.

  In the flowchart of FIG. 3, when the weft insertion error yarn repair method is automated by a method that does not prevent weft insertion after the weft insertion error, or when the operator manually repairs the weft insertion error yarn. In the case of performing the process, a step of removing the weft by stopping the weaving loom and the hollow motor 9 stopped by detecting the weft insertion error every reverse rotation is added. However, even in this case, the weft misplaced yarn is such that the weft 3 and the weft end 3a on the ground warp yarn 2 side are both open so that the weft misplaced yarn can be easily pulled out, and the portion of the scraper 6 that grips the cut piece 3b. Since the twisted state is not released, the cut piece 3b is not likely to fall off the scraping ear 6.

(Second Embodiment)
FIG. 4 shows a drive control method of the false twisting device 8 at the time of repairing a weaving wound by an operator as a second embodiment. In addition, the same code | symbol is attached | subjected about the structure same as 1st Embodiment, and detailed description is abbreviate | omitted.

  The hollow motor 9 is started simultaneously with the non-woven loom by the motor drive command means 23 based on the command of the rotation speed calculation means 18. During the operation of the loom, if a woven flaw is detected by some method such as visual inspection by an operator or use of a sheet inspection device, the hollow motor 9 is stopped together with the loom by a command from the rotational speed calculation means 18. Is done. An operator reverses the unwoven loom once by operating a reverse rotation switch (not shown) and then stops. By this operation, the rotation speed calculation means 18 outputs one reverse rotation and stop command to the motor drive command means 23, and performs one reverse rotation and stop of the hollow motor 9 in synchronism with the plain loom. Accordingly, since the weft 3 and the weft end 3a inserted immediately before the continuous weaving machine is completely released from the ground warp 2 and the discard warp 5, the operator can easily pull out the weft 3. However, since the scraped 6 twisted state at the position where the cut piece 3b is held is not released, the cut piece 3b is prevented from falling off. Thereafter, the operator sequentially repeats the reverse rotation, the stop, and the drawing operation of the weft 3.

  The rotation speed calculation means 18 counts the reverse rotation operation by the operator, and outputs the stop command for the hollow motor 9 to the motor drive command means 23 when the number of reverse rotations 3 to the weft 3 immediately before cutting by the cutter 7 is counted. Accordingly, when the operator performs a reverse operation after the number of reversals exceeding the number of weft insertions (three in this embodiment) to the weft position before cutting by the cutter 7, the unwoven loom reverses but the hollow motor 9 Keeps stopped. Since the weft 3 has already been cut at the weft end 3a, the weft 3 is completely opened only by the reverse opening of the ground warp 2, and the operator can easily pull out the weft 3. However, since the twisted ear 6 is not released from the twisted state due to the stop of the false twisting spindle 10, there is no loosening of the gripping state of the cut piece 3b, and it is possible to prevent the cut piece 3b from falling off. In this way, the operator repeats the reverse rotation, the stop and the drawing operation of the weft 3 of the loom. When the repair of the weaving is completed, the operator operates a start switch (not shown) to start the non-woven loom. In response to this operation, the rotation speed calculation means 18 of the control device 17 sends the motor drive command means 23 to A start command is output, and the hollow motor 9 is started in synchronism with the loom.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications are possible within the scope of the gist of the present invention, and can be implemented as follows.

(1) In the first and second embodiments, the motor for exclusive use of the false twisting device 8 is constituted by the hollow motor 9 composed of the stepping motor that is externally mounted on the false twist spindle 10, but the stepping motor is different from the false twist spindle 10. It is possible to implement with a configuration in which the false twist spindle 10 and the stepping motor are connected by a pulley and a belt.
(2) The dedicated motor of the false twisting device 8 is not limited to the stepping motor as in each of the above embodiments, but can be implemented by a servo motor or an induction motor.
(3) The motor drive command means 23 shown in each of the embodiments can be configured to automatically generate a drive signal suitable for the type of dedicated motor used. For example, as a drive signal, a pulse instruction type motor such as a stepping motor generates a pulse train, a position control type motor such as a servo motor generates a position command or an operation amount command, and a speed instruction type motor such as an induction motor. Then, the speed command voltage can be created.

It is a top view which shows the outline | summary of the false twist apparatus of the unwoven loom in 1st Embodiment. It is a block diagram which shows the exclusive motor drive control circuit of a false twist apparatus. It is a flowchart which shows 1st Embodiment. It is a flowchart which shows 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 筬 2 Ground warp 3 Weft 3a Weft end 3b Cut piece 4 Woven cloth 5 Disposal warp 6 Disposal 7 Cutter 8 False twisting device 9 Hollow motor 10 False twist spindle 11 False twist plate 12 Stator 13 Rotor 14 Closed ear guide hole 15 Dismantling guide 16 Dismantling drawer roller 17 Control device 18 Rotational speed calculation means 19 Rotational speed command means 20 Operation command means 21 Input device 22 Rotation angle detection device 23 of loom Motor drive command means

Claims (3)

A false twist is formed by intersecting a weft end inserted with a plurality of warp ends and a false twisting device for twisting the discard ear and a weft end held by the end after multiple weft insertions In the weft end processing apparatus in a plain loom equipped with a cutter for cutting,
During the normal weaving operation of the woven loom, the false twisting device is driven by a dedicated motor synchronized with the operation of the woven loom,
Wherein when the reverse rotation of the shuttleless loom to be performed after stopping the shuttleless loom, during the dedicated motor from the cloth fell position during the stop the shuttleless loom to the weft insertion times until the weft position before cutting by the cutter Reverse in sync with the loom,
A drive control method for a weft end processing apparatus in a warp weaving machine, wherein the dedicated motor is stopped and untwisted twisting is not released in the reverse rotation of the warp weaving machine exceeding the number of weft insertions.   The number of weft insertions from the pre-weaving position to the weft position before cutting by the cutter is the number of reversals that can release a weft insertion mis-thread when the unwoven loom stops due to a weft insertion error. The drive control method of the weft end processing apparatus in the unwoven loom according to 1.   The dedicated motor is composed of a rotor integrated with a false twist spindle of the false twist device and a stator having the rotor built therein, and a motor drive command means based on a rotational speed command and an operation command of the false twist spindle output from the control device. The drive control method for the weft end processing device in the non-woven weaving machine according to claim 1, wherein the driving and stopping is performed according to a command.

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