JP2017002421A - Method for controlling weft winding arm in weft length measurement and storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform correct positioning control of a weft winding arm with a simple configuration.SOLUTION: In response to an ON signal of an auxiliary switch, a weft engagement pin is moved from an engagement position to a release position and at the same time a motor is driven. The weft winding arm is rotated by rotation of the motor and a rotation amount sensor detects a rotation amount of the weft winding arm. The weft released from the weft engagement pin, a tip of which is held on a weft insertion nozzle side, revolves around a drum, and blocks a light beam from a weft release sensor. The weft release sensor originates a weft detection signal F1 according to passing of the weft. A rotation amount signal F2 outputted following the weft detection signal is recognized as an original position signal S and stored. Thus, a control device can calculate a rotation position of the weft winding arm by using the original position signal S and the rotation amount signal F2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for controlling a weft winding arm in a weft length measuring storage device.

  As the weft length measuring and storing device installed on the side of the loom, a method of winding and storing the weft on the drum by the weft winding arm is often used. When the weaving machine stops when the weaving machine is set up or when the weaving machine stops due to the weft being cut upstream of the weft length measuring and storing device, it is necessary to thread the weft into the weft measuring and storing device.

  In the threading operation, a series of operations in which the weft on the yarn feeding side is pulled through the weft winding arm and the weft pulled out from the weft winding arm is further pulled to the weft insertion nozzle side is performed manually or automatically by the operator. It is done by means. In the threading operation, in order to appropriately perform threading, it is necessary to stop the weft winding arm at a specific position regardless of whether it is manual or automatic. Particularly in the case of manual work, it is necessary for the operator to put his hand on the weft winding arm and stop the weft winding arm at a position where the threading can be performed.

  Patent Document 1 discloses a method for stopping a rotating yarn guide (weft winding arm) at an appropriate position in a weft length measuring and storing device (hereinafter referred to as a length measuring device) having means for automatically performing a weft threading operation. Is disclosed. When weft breakage occurs between the yarn feeder and the length measuring device, the loom stops and the rotary yarn guide stops. In the rotation range of the rotary yarn guide, an angle range corresponding to the weft locking pin is set as a stop prohibited area of the rotary yarn guide. The stop position of the rotating yarn guide is detected by an encoder. When the rotating yarn guide is stopped in the prohibited area, the drive motor of the rotating yarn guide is corrected and driven at a low speed, and the weft threading operation is performed after the rotating yarn guide is moved out of the prohibited area.

  Patent Document 2 discloses a fixed position stop device of a weft length measuring device provided with means for automatically performing a weft threading operation. The rotation range of the rotary yarn guide of the weft length measuring device is provided with four rotation detection proximity switches for detecting the rotation yarn guide, and one reference point detection proximity switch for detecting the rotation yarn guide. ing. When weft breakage occurs between the yarn feeder and the weft length measuring device, the loom and the weft length measuring device are stopped. After the loom stops, the drive motor of the rotating yarn guide is reversed and the rotating yarn guide is reversed at a slow speed.

  After the detection signal of the reference point detection proximity switch is output by the reverse rotation of the rotation yarn guide, when the detection signal from the first rotation detection proximity switch is output, the motor is turned off and the rotation yarn guide is turned off. Stop at a fixed position. After the rotary yarn guide stops at a fixed position, the threading operation is performed. After the detection signal of the reference point detection proximity switch is output, the detection signal from the second, third, or fourth rotation detection proximity switch is output, and then the motor rotates. The yarn guides are stopped at different positions.

Japanese Patent Laid-Open No. 3-180546 Japanese Patent Laid-Open No. 5-86553

  In Patent Document 1, since the drive motor of the rotary yarn guide has to be corrected and driven at a low speed after the weft length measuring and storage device is stopped, the configuration of the positioning control of the rotary yarn guide is complicated. In addition, the correction drive of the drive motor is only a function of moving the rotary yarn guide out of the prohibited area, so the rotary yarn guide does not always stop at a fixed position.

  According to Patent Document 2, it is necessary to newly provide a reference point detection proximity switch and a rotation detection proximity switch in the rotation range of the rotary yarn guide, and the rotary yarn guide is reversed at a slow speed after the weft length measuring device is stopped. Therefore, the configuration of the positioning control of the rotary yarn guide is complicated.

  An object of the present invention is to perform accurate positioning control of a weft winding arm with a simple configuration.

According to a first aspect of the present invention, there is provided a drum for storing the weft, a weft winding arm for rotating the periphery of the drum by driving a motor to wind the weft around the drum, and a weft insertion of the weft stored in the drum. A release position that is sometimes released, a weft lock pin that is moved to a lock position that locks the weft when the weft insertion ends, a weft release sensor that measures the number of ballooning of the weft when the weft is released, and the weft winding In the control method of the weft winding arm in the weft length measuring storage device comprising a rotation amount sensor for detecting the rotation amount of the arm,
The weft yarn drawn out from the weft winding arm and extending toward the weft insertion nozzle is prepared in advance, and the weft winding arm is rotated based on a preliminary winding signal for winding the weft around the drum. The release position is detected by the weft release sensor by detecting the weft ballooning accompanying the rotation of the weft winding arm, and the rotation amount signal of the rotation amount sensor output subsequent to the weft detection signal of the weft release sensor is the origin. The position signal is used, and the rotational position of the weft winding arm is calculated based on the origin position signal and the rotation amount signal from the rotation amount sensor.

  According to claim 1, by using the weft detection signal of the weft release sensor of the weft length measuring storage device, the origin position signal of the weft winding arm is detected without adding a special sensor, and the origin position signal The rotational position of the weft winding arm can be accurately calculated from the rotation amount signal. For this reason, it is possible to perform positioning control for accurately stopping the weft winding arm at an arbitrary position with a simple configuration. For example, it is possible to improve the work efficiency of the operator during threading.

  According to a second aspect of the present invention, the rotation amount sensor detects a rotation amount of the motor. According to claim 2, since the origin position signal of the weft winding arm can be detected using the weft detection signal of the weft release sensor, the rotation amount of the motor for grasping the rotation amount of the weft winding arm can be detected, for example, The simplest and cheapest rotation amount sensor such as an incremental encoder can be used.

  According to a third aspect of the present invention, the weft winding arm is stopped at a threading position suitable for threading work based on the calculated rotational position. According to the third aspect, since the origin position signal for the weft winding arm can be detected, the weft winding arm can be reliably stopped at a specific position.

  A fourth aspect of the present invention is characterized in that the weft winding arm is stopped by switching to a different rotational position when the loom stops due to yarn breakage and when the loom other than the yarn breakage stops. According to the fourth aspect, the workability for the weft length measuring and storing device can be improved by switching the weft winding arm to a different position and stopping it when the loom stops due to yarn breakage and when the loom other than yarn breakage stops. Can be improved.

  The present invention can perform accurate positioning control of the weft winding arm with a simple configuration.

It is a schematic front view which shows a weft length measuring storage apparatus. It is an operation | movement sequence which shows the control method of a weft winding arm. It is a schematic front view which shows the weft winding arm at the time of control. FIG. 4 is a schematic side view of FIG. 3.

  A first embodiment will be described with reference to FIGS. In FIG. 1, the outline of the weft length measuring storage device 1 will be described. The drum 2 for storing the weft Y is held in a stationary state by means of, for example, a magnet (not shown) or the like in an annular case 3 fixed to a frame (not shown). The weft winding arm 4 made of a hollow tube is connected to a motor shaft 6 made of a hollow tube connected to a rotor (not shown) of a motor 5 housed in the case 3, and the drum 2 is driven by the motor 5. Rotate around.

  The motor 5 is constituted by an AC motor, and is connected to the control device 8 via the inverter 7. A weft introduction tube 9 made of a hollow tube concentric with the motor shaft 6 is provided upstream of the motor shaft 6 in the weft travel direction (left side in FIG. 1). The hollow portion of the weft winding arm 4 is communicated with the hollow portion of the weft introduction tube 9 through the hollow portion of the motor shaft 6.

  At the downstream end of the drum 2 in the weft travel direction (the right end in FIG. 1), the weft locking pin 10 and the weft engagement that engage and release the weft Y by engaging and separating the peripheral surface of the drum 2. A weft release sensor 11 is provided for detecting the ballooning of the weft Y drawn from the drum 2 when the weft is released by the stop pin 10 and measuring the number of balloons. The weft lock pin 10 and the weft release sensor 11 are each connected to the control device 8. The weft locking pin 10 is moved to a release position separated from the peripheral surface of the drum 2 by a command signal transmitted from the control device 8 at the start of weft insertion to release the weft Y.

  The weft release sensor 11 detects ballooning of the weft Y drawn from the drum 2 as the weft is inserted, and outputs a detection signal to the control device 8. When the number of detection signals output from the weft release sensor 11, that is, the number of ballooning times reaches a preset number of weft draws, the control device 8 sends a command signal to engage the weft locking pin 10 with the drum 2. Move to the matching locking position. The weft locking pin 10 locks the weft Y at the locking position and prevents the weft Y from being pulled out.

  A yarn feeding bobbin 12 is installed on the upstream side of the weft length measuring storage device 1 in the weft direction (left side in FIG. 1), and the weft Y of the yarn feeding bobbin 12 passes from the weft introduction tube 9 through the motor shaft 6. It is drawn through the weft winding arm 4. The weft Y drawn out by the rotation of the weft winding arm 4 is wound around the peripheral surface of the drum 2 and stored when the weft locking pin 10 is in the locking position. The weft Y stored in the drum 2 passes through the balloon cover 13 installed on the downstream side in the weft measuring direction of the weft length measuring storage device 1 (right side in FIG. 1) and is drawn through the weft insertion nozzle 14 to be weft. When the locking pin 10 is in the release position, it is provided for weft insertion.

  The motor shaft 6 is provided with a rotation amount sensor 15 of the motor 5 as a rotation amount sensor for detecting the rotation amount of the weft winding arm 4. The rotation amount sensor 15 is configured by a sensor that simply detects the rotation amount of the motor 5, such as an incremental encoder without an origin signal. The rotation amount sensor 15 is electrically connected to the control device 8 and transmits a rotation amount signal of the motor 5. The rotation amount of the motor 5 detected by the rotation amount sensor 15 represents the rotation amount of the weft winding arm 4. Therefore, although how much the weft winding arm 4 has rotated can be known from the rotation amount signal of the rotation amount sensor 15, it is not known at which rotation position the weft winding arm 4 is located.

  The control device 8 is electrically connected to an encoder 16 that detects the rotation angle of the loom, and is configured to synchronize the control timing of the weft length measuring storage device 1 with the operation of the loom. In addition, a preliminary winding switch 17 is electrically connected to the control device 8. The preliminary winding switch 17 newly winds the weft Y around the drum 2 when the weaving machine is set up or when a weft break occurs in which the weft Y is cut between the weft length measuring storage device 1 and the yarn feeding bobbin 12. Means.

  The weft winding arm 4 is rotated by a motor 5, and the weft Y having a preset number of turns is wound around the peripheral surface of the drum 2 by the rotation of the winding arm 4.

  A method for controlling the weft winding arm 4 in this embodiment will be described with reference to FIGS. When the pre-winding switch 17 is turned on, the control device 8 starts rotating the motor 5 and moves or holds the weft locking pin 10 so as to be positioned at the release position. When the first weft detection signal F1 of the weft release sensor 11 is input after the pre-winding switch 17 is turned on, the control device 8 moves the weft locking pin 10 to the locking position. Accordingly, the preliminary winding of the weft Y is executed after the output of the first weft detection signal F1 of the weft release sensor 11. Further, the control device 8 recognizes the rotation amount signal F2 (the falling portion of the signal in FIG. 2) of the rotation amount sensor 15 output subsequent to the weft detection signal F1 of the weft release sensor 11 as the origin position signal S. ,Remember.

  The operator prepares in advance a weft Y drawn from the weft winding arm 4 and extending toward the weft insertion nozzle 14. When a preliminary winding signal is input to the control device 8 by turning on the preliminary winding switch 17, the weft locking pin 10 is released from the locking position by a command signal from the control device 8, as shown in FIGS. Moved to position. At the same time, the motor 5 is driven by a command signal from the control device 8. The weft winding arm 4 is rotated by the rotation of the motor 5, the rotation amount sensor 15 detects the rotation amount of the weft winding arm 4, and a rotation amount signal F 2 is transmitted to the control device 8.

  The weft Y drawn from the weft winding arm 4 is released from the weft locking pin 10 and the tip is held on the weft insertion nozzle 14 side, so that the periphery of the drum 2 is rotated by the rotation of the weft winding arm 4. It turns without being wound. As shown in FIG. 4, the weft Y passes through the position of the weft release sensor 11 and blocks the light beam L of the weft release sensor 11. The weft release sensor 11 detects the passage of the weft Y and transmits a weft detection signal F1 to the control device 8.

  The control device 8 recognizes and stores the falling edge of the rotation amount signal F2 output following the weft detection signal F1 as the origin position signal S. Accordingly, the subsequent rotation amount signal F2 is input to the control device 8 in a state where the origin position signal S is recognized and stored. Therefore, the control device 8 can calculate the rotational position of the weft winding arm 4 from the origin position signal S and the rotation amount signal F2.

  In addition, after recognizing the origin position signal S, the preliminary winding may be performed without moving the weft locking pin 10 to the release position when the preliminary winding switch 17 is operated. In this case, when the weft winding arm 4 is rotated by the operator, the recognized origin position and the rotational position of the weft winding arm 4 may be shifted. For this reason, in this embodiment, every time the preliminary winding switch 17 is operated, the weft locking pin 10 is released and the origin position signal S is updated. When a predetermined number of wefts Y are wound around the peripheral surface of the drum 2, the motor 5 is stopped and the preliminary winding is completed.

  In this embodiment, at the time of preliminary winding, by using the weft detection signal F1 of the weft release sensor 11, the origin position signal S of the weft winding arm 4 is recognized without adding a special sensor, and the origin position signal The rotational position of the weft winding arm 4 can be accurately calculated from S and the rotation amount signal F2. For this reason, positioning control for accurately stopping the weft winding arm 4 at an arbitrary fixed position can be performed with a simple configuration.

  Therefore, for example, as shown in FIG. 4, when the yarn is out, the weft winding arm 4 can be stopped at a position 4A suitable for the threading work of the worker 18, and the working efficiency of the worker 18 is improved. Can do. When the weaving machine is stopped other than the yarn breakage and the threading operation is unnecessary, the weft Y wound around the drum 2 with the weft winding arm 4 is difficult to loosen, for example, at the position 4B on the cheese stand 19 side. Can be stopped.

  Further, since the origin position signal S of the weft winding arm 4 can be detected by using the weft detection signal F1 of the weft release sensor 11, the rotation amount of the motor 5 for grasping the rotation amount of the weft winding arm 4 can be detected, for example. The simplest and cheapest rotation amount sensor 15 such as an incremental encoder can be used.

  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 present embodiment, an incremental encoder without an origin signal is shown as the rotation amount sensor 15. However, the rotation amount sensor 15 omits the incremental encoder and performs the position sensorless control of the motor 5 to allow weft winding. A method of grasping the rotation amount of the attachment arm 4 by calculation may be used. In this case, the rotation amount calculation unit constitutes a rotation amount sensor.
(2) The rotation amount sensor 15 that detects the rotation amount of the weft winding arm 4 is not limited to the configuration provided in the motor shaft 6, and may be a configuration that directly detects the rotation amount of the weft winding arm 4. Even in this case, since it is not necessary to detect the rotational position of the weft winding arm 4, the structure for detection is simplified and an inexpensive sensor can be used.

(3) In this embodiment, the weft release sensor 11 is provided at a position adjacent to the weft locking pin 10 on the peripheral surface of the drum 2, but may be provided at a position away from the weft locking pin 10. .
(4) FIG. 2 shows a configuration in which the weft locking pin 10 moves from the locking position to the releasing position when the preliminary winding switch 17 is turned on. However, the weft locking pin 10 exists in the releasing position in advance. In this case, the weft locking pin 10 may be maintained at the release position.
(5) In the present embodiment, the configuration in which the balloon cover 13 is installed between the weft length measuring storage device 1 and the weft insertion nozzle 14 is shown, but the balloon cover 13 is not necessarily required.

DESCRIPTION OF SYMBOLS 1 Weft length measurement storage apparatus 2 Drum 4 Weft winding arm 4A Threading work position 4B Position where weft is hard to loosen 5 Motor 6 Motor shaft 7 Inverter 8 Controller 9 Weft introduction pipe 10 Weft lock pin 11 Weft release sensor 12 Feed yarn Bobbin 13 Balloon cover 14 Weft insertion nozzle 15 Rotation amount sensor 16 Encoder 17 Pre-winding switch 18 Worker 19 Cheese stand F1 Weft detection signal F2 Rotation amount signal L Ray S Origin position signal Y Weft

Claims (4)

A drum for storing the weft, a weft winding arm for rotating the periphery of the drum by driving a motor to wind the weft around the peripheral surface of the drum, and a release position for releasing the weft stored in the drum at the start of weft insertion And a weft locking pin that is moved to a locking position for locking the weft at the end of weft insertion, a weft release sensor that measures the number of ballooning of the weft when the weft is released, and a rotation amount of the weft winding arm. In the control method of the weft winding arm in the weft length measuring storage device comprising a rotation amount sensor to detect,
Prepare the weft yarn drawn out from the weft winding arm in advance and extending to the weft insertion nozzle side,
The weft winding arm is rotated based on a preliminary winding signal for winding the weft around the drum, and the weft locking pin is set to a release position.
Detecting the weft yarn ballooning with the rotation of the weft winding arm by the weft release sensor;
The rotation amount signal of the rotation amount sensor output subsequent to the weft detection signal of the weft release sensor is used as an origin position signal,
A method for controlling a weft winding arm in a weft length measuring and storing device, wherein a rotational position of the weft winding arm is calculated based on the origin position signal and a rotation amount signal from the rotation amount sensor.   The method of controlling a weft winding arm in a weft length measuring and storing apparatus according to claim 1, wherein the rotation amount sensor detects the amount of rotation of the motor.   The weft winding arm in the weft length measuring and storing device according to claim 1 or 2, wherein the weft winding arm is stopped at a threading position suitable for a threading operation based on the calculated rotational position. Winding arm control method.   The said weft yarn winding arm is switched to a different rotational position and stopped when the loom stops due to yarn breakage and when the loom other than the yarn breakage stops. The control method of the weft winding arm in the weft length measuring and storing device according to any one of the above.

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